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Date: Fri, 21 Jun 2024 14:59:41 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org,
akpm@...ux-foundation.org,
torvalds@...ux-foundation.org,
stable@...r.kernel.org
Cc: lwn@....net,
jslaby@...e.cz,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Linux 5.10.220
diff --git a/Documentation/filesystems/files.rst b/Documentation/filesystems/files.rst
index cbf8e57376bf..bcf84459917f 100644
--- a/Documentation/filesystems/files.rst
+++ b/Documentation/filesystems/files.rst
@@ -62,7 +62,7 @@ the fdtable structure -
be held.
4. To look up the file structure given an fd, a reader
- must use either fcheck() or fcheck_files() APIs. These
+ must use either lookup_fd_rcu() or files_lookup_fd_rcu() APIs. These
take care of barrier requirements due to lock-free lookup.
An example::
@@ -70,7 +70,7 @@ the fdtable structure -
struct file *file;
rcu_read_lock();
- file = fcheck(fd);
+ file = lookup_fd_rcu(fd);
if (file) {
...
}
@@ -84,7 +84,7 @@ the fdtable structure -
on ->f_count::
rcu_read_lock();
- file = fcheck_files(files, fd);
+ file = files_lookup_fd_rcu(files, fd);
if (file) {
if (atomic_long_inc_not_zero(&file->f_count))
*fput_needed = 1;
@@ -104,7 +104,7 @@ the fdtable structure -
lock-free, they must be installed using rcu_assign_pointer()
API. If they are looked up lock-free, rcu_dereference()
must be used. However it is advisable to use files_fdtable()
- and fcheck()/fcheck_files() which take care of these issues.
+ and lookup_fd_rcu()/files_lookup_fd_rcu() which take care of these issues.
7. While updating, the fdtable pointer must be looked up while
holding files->file_lock. If ->file_lock is dropped, then
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index fbd695d66905..23a0d24168bc 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -433,17 +433,21 @@ prototypes::
void (*lm_break)(struct file_lock *); /* break_lease callback */
int (*lm_change)(struct file_lock **, int);
bool (*lm_breaker_owns_lease)(struct file_lock *);
+ bool (*lm_lock_expirable)(struct file_lock *);
+ void (*lm_expire_lock)(void);
locking rules:
====================== ============= ================= =========
-ops inode->i_lock blocked_lock_lock may block
+ops flc_lock blocked_lock_lock may block
====================== ============= ================= =========
-lm_notify: yes yes no
+lm_notify: no yes no
lm_grant: no no no
lm_break: yes no no
lm_change yes no no
-lm_breaker_owns_lease: no no no
+lm_breaker_owns_lease: yes no no
+lm_lock_expirable yes no no
+lm_expire_lock no no yes
====================== ============= ================= =========
buffer_head
diff --git a/Documentation/filesystems/nfs/exporting.rst b/Documentation/filesystems/nfs/exporting.rst
index 33d588a01ace..6f59a364f84c 100644
--- a/Documentation/filesystems/nfs/exporting.rst
+++ b/Documentation/filesystems/nfs/exporting.rst
@@ -154,6 +154,11 @@ struct which has the following members:
to find potential names, and matches inode numbers to find the correct
match.
+ flags
+ Some filesystems may need to be handled differently than others. The
+ export_operations struct also includes a flags field that allows the
+ filesystem to communicate such information to nfsd. See the Export
+ Operations Flags section below for more explanation.
A filehandle fragment consists of an array of 1 or more 4byte words,
together with a one byte "type".
@@ -163,3 +168,76 @@ generated by encode_fh, in which case it will have been padded with
nuls. Rather, the encode_fh routine should choose a "type" which
indicates the decode_fh how much of the filehandle is valid, and how
it should be interpreted.
+
+Export Operations Flags
+-----------------------
+In addition to the operation vector pointers, struct export_operations also
+contains a "flags" field that allows the filesystem to communicate to nfsd
+that it may want to do things differently when dealing with it. The
+following flags are defined:
+
+ EXPORT_OP_NOWCC - disable NFSv3 WCC attributes on this filesystem
+ RFC 1813 recommends that servers always send weak cache consistency
+ (WCC) data to the client after each operation. The server should
+ atomically collect attributes about the inode, do an operation on it,
+ and then collect the attributes afterward. This allows the client to
+ skip issuing GETATTRs in some situations but means that the server
+ is calling vfs_getattr for almost all RPCs. On some filesystems
+ (particularly those that are clustered or networked) this is expensive
+ and atomicity is difficult to guarantee. This flag indicates to nfsd
+ that it should skip providing WCC attributes to the client in NFSv3
+ replies when doing operations on this filesystem. Consider enabling
+ this on filesystems that have an expensive ->getattr inode operation,
+ or when atomicity between pre and post operation attribute collection
+ is impossible to guarantee.
+
+ EXPORT_OP_NOSUBTREECHK - disallow subtree checking on this fs
+ Many NFS operations deal with filehandles, which the server must then
+ vet to ensure that they live inside of an exported tree. When the
+ export consists of an entire filesystem, this is trivial. nfsd can just
+ ensure that the filehandle live on the filesystem. When only part of a
+ filesystem is exported however, then nfsd must walk the ancestors of the
+ inode to ensure that it's within an exported subtree. This is an
+ expensive operation and not all filesystems can support it properly.
+ This flag exempts the filesystem from subtree checking and causes
+ exportfs to get back an error if it tries to enable subtree checking
+ on it.
+
+ EXPORT_OP_CLOSE_BEFORE_UNLINK - always close cached files before unlinking
+ On some exportable filesystems (such as NFS) unlinking a file that
+ is still open can cause a fair bit of extra work. For instance,
+ the NFS client will do a "sillyrename" to ensure that the file
+ sticks around while it's still open. When reexporting, that open
+ file is held by nfsd so we usually end up doing a sillyrename, and
+ then immediately deleting the sillyrenamed file just afterward when
+ the link count actually goes to zero. Sometimes this delete can race
+ with other operations (for instance an rmdir of the parent directory).
+ This flag causes nfsd to close any open files for this inode _before_
+ calling into the vfs to do an unlink or a rename that would replace
+ an existing file.
+
+ EXPORT_OP_REMOTE_FS - Backing storage for this filesystem is remote
+ PF_LOCAL_THROTTLE exists for loopback NFSD, where a thread needs to
+ write to one bdi (the final bdi) in order to free up writes queued
+ to another bdi (the client bdi). Such threads get a private balance
+ of dirty pages so that dirty pages for the client bdi do not imact
+ the daemon writing to the final bdi. For filesystems whose durable
+ storage is not local (such as exported NFS filesystems), this
+ constraint has negative consequences. EXPORT_OP_REMOTE_FS enables
+ an export to disable writeback throttling.
+
+ EXPORT_OP_NOATOMIC_ATTR - Filesystem does not update attributes atomically
+ EXPORT_OP_NOATOMIC_ATTR indicates that the exported filesystem
+ cannot provide the semantics required by the "atomic" boolean in
+ NFSv4's change_info4. This boolean indicates to a client whether the
+ returned before and after change attributes were obtained atomically
+ with the respect to the requested metadata operation (UNLINK,
+ OPEN/CREATE, MKDIR, etc).
+
+ EXPORT_OP_FLUSH_ON_CLOSE - Filesystem flushes file data on close(2)
+ On most filesystems, inodes can remain under writeback after the
+ file is closed. NFSD relies on client activity or local flusher
+ threads to handle writeback. Certain filesystems, such as NFS, flush
+ all of an inode's dirty data on last close. Exports that behave this
+ way should set EXPORT_OP_FLUSH_ON_CLOSE so that NFSD knows to skip
+ waiting for writeback when closing such files.
diff --git a/Makefile b/Makefile
index 3b36b77589f2..9304408d8ace 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 5
PATCHLEVEL = 10
-SUBLEVEL = 219
+SUBLEVEL = 220
EXTRAVERSION =
NAME = Dare mighty things
diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
index 026c181a98c5..60b5583e9eaf 100644
--- a/arch/powerpc/platforms/cell/spufs/coredump.c
+++ b/arch/powerpc/platforms/cell/spufs/coredump.c
@@ -74,7 +74,7 @@ static struct spu_context *coredump_next_context(int *fd)
*fd = n - 1;
rcu_read_lock();
- file = fcheck(*fd);
+ file = lookup_fd_rcu(*fd);
ctx = SPUFS_I(file_inode(file))->i_ctx;
get_spu_context(ctx);
rcu_read_unlock();
diff --git a/crypto/algboss.c b/crypto/algboss.c
index 5ebccbd6b74e..b87f907bb142 100644
--- a/crypto/algboss.c
+++ b/crypto/algboss.c
@@ -74,7 +74,7 @@ static int cryptomgr_probe(void *data)
complete_all(¶m->larval->completion);
crypto_alg_put(¶m->larval->alg);
kfree(param);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
}
static int cryptomgr_schedule_probe(struct crypto_larval *larval)
@@ -209,7 +209,7 @@ static int cryptomgr_test(void *data)
crypto_alg_tested(param->driver, err);
kfree(param);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
}
static int cryptomgr_schedule_test(struct crypto_alg *alg)
diff --git a/fs/Kconfig b/fs/Kconfig
index da524c4d7b7e..11b60d160f88 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -320,7 +320,7 @@ config LOCKD
config LOCKD_V4
bool
- depends on NFSD_V3 || NFS_V3
+ depends on NFSD || NFS_V3
depends on FILE_LOCKING
default y
@@ -333,6 +333,10 @@ config NFS_COMMON
depends on NFSD || NFS_FS || LOCKD
default y
+config NFS_V4_2_SSC_HELPER
+ bool
+ default y if NFS_V4_2
+
source "net/sunrpc/Kconfig"
source "fs/ceph/Kconfig"
source "fs/cifs/Kconfig"
diff --git a/fs/autofs/dev-ioctl.c b/fs/autofs/dev-ioctl.c
index 322b7dfb4ea0..5bf781ea6d67 100644
--- a/fs/autofs/dev-ioctl.c
+++ b/fs/autofs/dev-ioctl.c
@@ -4,9 +4,10 @@
* Copyright 2008 Ian Kent <raven@...maw.net>
*/
+#include <linux/module.h>
#include <linux/miscdevice.h>
#include <linux/compat.h>
-#include <linux/syscalls.h>
+#include <linux/fdtable.h>
#include <linux/magic.h>
#include <linux/nospec.h>
@@ -289,7 +290,7 @@ static int autofs_dev_ioctl_closemount(struct file *fp,
struct autofs_sb_info *sbi,
struct autofs_dev_ioctl *param)
{
- return ksys_close(param->ioctlfd);
+ return close_fd(param->ioctlfd);
}
/*
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index ecc8ecbbfa5a..7b987de0babe 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -412,9 +412,14 @@ static int cachefiles_bury_object(struct cachefiles_cache *cache,
if (ret < 0) {
cachefiles_io_error(cache, "Rename security error %d", ret);
} else {
+ struct renamedata rd = {
+ .old_dir = d_inode(dir),
+ .old_dentry = rep,
+ .new_dir = d_inode(cache->graveyard),
+ .new_dentry = grave,
+ };
trace_cachefiles_rename(object, rep, grave, why);
- ret = vfs_rename(d_inode(dir), rep,
- d_inode(cache->graveyard), grave, NULL, 0);
+ ret = vfs_rename(&rd);
if (ret != 0 && ret != -ENOMEM)
cachefiles_io_error(cache,
"Rename failed with error %d", ret);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 164b98540716..a3c0e6a4e484 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1242,7 +1242,7 @@ cifs_demultiplex_thread(void *p)
}
memalloc_noreclaim_restore(noreclaim_flag);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
}
/* extract the host portion of the UNC string */
diff --git a/fs/coredump.c b/fs/coredump.c
index 9d91e831ed0b..7b085975ea16 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -590,7 +590,6 @@ void do_coredump(const kernel_siginfo_t *siginfo)
int ispipe;
size_t *argv = NULL;
int argc = 0;
- struct files_struct *displaced;
/* require nonrelative corefile path and be extra careful */
bool need_suid_safe = false;
bool core_dumped = false;
@@ -797,11 +796,9 @@ void do_coredump(const kernel_siginfo_t *siginfo)
}
/* get us an unshared descriptor table; almost always a no-op */
- retval = unshare_files(&displaced);
+ retval = unshare_files();
if (retval)
goto close_fail;
- if (displaced)
- put_files_struct(displaced);
if (!dump_interrupted()) {
/*
* umh disabled with CONFIG_STATIC_USERMODEHELPER_PATH="" would
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c867a0d62f36..1dbe0c3ff38e 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -598,6 +598,7 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct dentry *lower_new_dir_dentry;
struct dentry *trap;
struct inode *target_inode;
+ struct renamedata rd = {};
if (flags)
return -EINVAL;
@@ -627,9 +628,12 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = -ENOTEMPTY;
goto out_lock;
}
- rc = vfs_rename(d_inode(lower_old_dir_dentry), lower_old_dentry,
- d_inode(lower_new_dir_dentry), lower_new_dentry,
- NULL, 0);
+
+ rd.old_dir = d_inode(lower_old_dir_dentry);
+ rd.old_dentry = lower_old_dentry;
+ rd.new_dir = d_inode(lower_new_dir_dentry);
+ rd.new_dentry = lower_new_dentry;
+ rc = vfs_rename(&rd);
if (rc)
goto out_lock;
if (target_inode)
diff --git a/fs/exec.c b/fs/exec.c
index ebe9011955b9..d5c8f085235b 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1264,6 +1264,11 @@ int begin_new_exec(struct linux_binprm * bprm)
if (retval)
goto out;
+ /* Ensure the files table is not shared. */
+ retval = unshare_files();
+ if (retval)
+ goto out;
+
/*
* Must be called _before_ exec_mmap() as bprm->mm is
* not visibile until then. This also enables the update
@@ -1789,7 +1794,6 @@ static int bprm_execve(struct linux_binprm *bprm,
int fd, struct filename *filename, int flags)
{
struct file *file;
- struct files_struct *displaced;
int retval;
/*
@@ -1797,13 +1801,9 @@ static int bprm_execve(struct linux_binprm *bprm,
*/
io_uring_task_cancel();
- retval = unshare_files(&displaced);
- if (retval)
- return retval;
-
retval = prepare_bprm_creds(bprm);
if (retval)
- goto out_files;
+ return retval;
check_unsafe_exec(bprm);
current->in_execve = 1;
@@ -1818,11 +1818,14 @@ static int bprm_execve(struct linux_binprm *bprm,
bprm->file = file;
/*
* Record that a name derived from an O_CLOEXEC fd will be
- * inaccessible after exec. Relies on having exclusive access to
- * current->files (due to unshare_files above).
+ * inaccessible after exec. This allows the code in exec to
+ * choose to fail when the executable is not mmaped into the
+ * interpreter and an open file descriptor is not passed to
+ * the interpreter. This makes for a better user experience
+ * than having the interpreter start and then immediately fail
+ * when it finds the executable is inaccessible.
*/
- if (bprm->fdpath &&
- close_on_exec(fd, rcu_dereference_raw(current->files->fdt)))
+ if (bprm->fdpath && get_close_on_exec(fd))
bprm->interp_flags |= BINPRM_FLAGS_PATH_INACCESSIBLE;
/* Set the unchanging part of bprm->cred */
@@ -1840,8 +1843,6 @@ static int bprm_execve(struct linux_binprm *bprm,
rseq_execve(current);
acct_update_integrals(current);
task_numa_free(current, false);
- if (displaced)
- put_files_struct(displaced);
return retval;
out:
@@ -1858,10 +1859,6 @@ static int bprm_execve(struct linux_binprm *bprm,
current->fs->in_exec = 0;
current->in_execve = 0;
-out_files:
- if (displaced)
- reset_files_struct(displaced);
-
return retval;
}
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 2dd55b172d57..8c28bd1c9ed9 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -18,7 +18,7 @@
#include <linux/sched.h>
#include <linux/cred.h>
-#define dprintk(fmt, args...) do{}while(0)
+#define dprintk(fmt, args...) pr_debug(fmt, ##args)
static int get_name(const struct path *path, char *name, struct dentry *child);
@@ -132,8 +132,8 @@ static struct dentry *reconnect_one(struct vfsmount *mnt,
inode_unlock(dentry->d_inode);
if (IS_ERR(parent)) {
- dprintk("%s: get_parent of %ld failed, err %d\n",
- __func__, dentry->d_inode->i_ino, PTR_ERR(parent));
+ dprintk("get_parent of %lu failed, err %ld\n",
+ dentry->d_inode->i_ino, PTR_ERR(parent));
return parent;
}
@@ -147,7 +147,7 @@ static struct dentry *reconnect_one(struct vfsmount *mnt,
dprintk("%s: found name: %s\n", __func__, nbuf);
tmp = lookup_one_len_unlocked(nbuf, parent, strlen(nbuf));
if (IS_ERR(tmp)) {
- dprintk("%s: lookup failed: %d\n", __func__, PTR_ERR(tmp));
+ dprintk("lookup failed: %ld\n", PTR_ERR(tmp));
err = PTR_ERR(tmp);
goto out_err;
}
@@ -417,9 +417,11 @@ int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len,
}
EXPORT_SYMBOL_GPL(exportfs_encode_fh);
-struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
- int fh_len, int fileid_type,
- int (*acceptable)(void *, struct dentry *), void *context)
+struct dentry *
+exportfs_decode_fh_raw(struct vfsmount *mnt, struct fid *fid, int fh_len,
+ int fileid_type,
+ int (*acceptable)(void *, struct dentry *),
+ void *context)
{
const struct export_operations *nop = mnt->mnt_sb->s_export_op;
struct dentry *result, *alias;
@@ -432,10 +434,8 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
if (!nop || !nop->fh_to_dentry)
return ERR_PTR(-ESTALE);
result = nop->fh_to_dentry(mnt->mnt_sb, fid, fh_len, fileid_type);
- if (PTR_ERR(result) == -ENOMEM)
- return ERR_CAST(result);
if (IS_ERR_OR_NULL(result))
- return ERR_PTR(-ESTALE);
+ return result;
/*
* If no acceptance criteria was specified by caller, a disconnected
@@ -561,10 +561,26 @@ struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
err_result:
dput(result);
- if (err != -ENOMEM)
- err = -ESTALE;
return ERR_PTR(err);
}
+EXPORT_SYMBOL_GPL(exportfs_decode_fh_raw);
+
+struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
+ int fh_len, int fileid_type,
+ int (*acceptable)(void *, struct dentry *),
+ void *context)
+{
+ struct dentry *ret;
+
+ ret = exportfs_decode_fh_raw(mnt, fid, fh_len, fileid_type,
+ acceptable, context);
+ if (IS_ERR_OR_NULL(ret)) {
+ if (ret == ERR_PTR(-ENOMEM))
+ return ret;
+ return ERR_PTR(-ESTALE);
+ }
+ return ret;
+}
EXPORT_SYMBOL_GPL(exportfs_decode_fh);
MODULE_LICENSE("GPL");
diff --git a/fs/file.c b/fs/file.c
index d6bc73960e4a..fdb84a64724b 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -175,7 +175,7 @@ static int expand_fdtable(struct files_struct *files, unsigned int nr)
spin_unlock(&files->file_lock);
new_fdt = alloc_fdtable(nr);
- /* make sure all __fd_install() have seen resize_in_progress
+ /* make sure all fd_install() have seen resize_in_progress
* or have finished their rcu_read_lock_sched() section.
*/
if (atomic_read(&files->count) > 1)
@@ -198,7 +198,7 @@ static int expand_fdtable(struct files_struct *files, unsigned int nr)
rcu_assign_pointer(files->fdt, new_fdt);
if (cur_fdt != &files->fdtab)
call_rcu(&cur_fdt->rcu, free_fdtable_rcu);
- /* coupled with smp_rmb() in __fd_install() */
+ /* coupled with smp_rmb() in fd_install() */
smp_wmb();
return 1;
}
@@ -466,18 +466,6 @@ void put_files_struct(struct files_struct *files)
}
}
-void reset_files_struct(struct files_struct *files)
-{
- struct task_struct *tsk = current;
- struct files_struct *old;
-
- old = tsk->files;
- task_lock(tsk);
- tsk->files = files;
- task_unlock(tsk);
- put_files_struct(old);
-}
-
void exit_files(struct task_struct *tsk)
{
struct files_struct * files = tsk->files;
@@ -521,9 +509,9 @@ static unsigned int find_next_fd(struct fdtable *fdt, unsigned int start)
/*
* allocate a file descriptor, mark it busy.
*/
-int __alloc_fd(struct files_struct *files,
- unsigned start, unsigned end, unsigned flags)
+static int alloc_fd(unsigned start, unsigned end, unsigned flags)
{
+ struct files_struct *files = current->files;
unsigned int fd;
int error;
struct fdtable *fdt;
@@ -579,14 +567,9 @@ int __alloc_fd(struct files_struct *files,
return error;
}
-static int alloc_fd(unsigned start, unsigned flags)
-{
- return __alloc_fd(current->files, start, rlimit(RLIMIT_NOFILE), flags);
-}
-
int __get_unused_fd_flags(unsigned flags, unsigned long nofile)
{
- return __alloc_fd(current->files, 0, nofile, flags);
+ return alloc_fd(0, nofile, flags);
}
int get_unused_fd_flags(unsigned flags)
@@ -625,17 +608,13 @@ EXPORT_SYMBOL(put_unused_fd);
* It should never happen - if we allow dup2() do it, _really_ bad things
* will follow.
*
- * NOTE: __fd_install() variant is really, really low-level; don't
- * use it unless you are forced to by truly lousy API shoved down
- * your throat. 'files' *MUST* be either current->files or obtained
- * by get_files_struct(current) done by whoever had given it to you,
- * or really bad things will happen. Normally you want to use
- * fd_install() instead.
+ * This consumes the "file" refcount, so callers should treat it
+ * as if they had called fput(file).
*/
-void __fd_install(struct files_struct *files, unsigned int fd,
- struct file *file)
+void fd_install(unsigned int fd, struct file *file)
{
+ struct files_struct *files = current->files;
struct fdtable *fdt;
rcu_read_lock_sched();
@@ -657,15 +636,6 @@ void __fd_install(struct files_struct *files, unsigned int fd,
rcu_read_unlock_sched();
}
-/*
- * This consumes the "file" refcount, so callers should treat it
- * as if they had called fput(file).
- */
-void fd_install(unsigned int fd, struct file *file)
-{
- __fd_install(current->files, fd, file);
-}
-
EXPORT_SYMBOL(fd_install);
static struct file *pick_file(struct files_struct *files, unsigned fd)
@@ -689,11 +659,9 @@ static struct file *pick_file(struct files_struct *files, unsigned fd)
return file;
}
-/*
- * The same warnings as for __alloc_fd()/__fd_install() apply here...
- */
-int __close_fd(struct files_struct *files, unsigned fd)
+int close_fd(unsigned fd)
{
+ struct files_struct *files = current->files;
struct file *file;
file = pick_file(files, fd);
@@ -702,7 +670,7 @@ int __close_fd(struct files_struct *files, unsigned fd)
return filp_close(file, files);
}
-EXPORT_SYMBOL(__close_fd); /* for ksys_close() */
+EXPORT_SYMBOL(close_fd); /* for ksys_close() */
/**
* __close_range() - Close all file descriptors in a given range.
@@ -861,68 +829,28 @@ void do_close_on_exec(struct files_struct *files)
spin_unlock(&files->file_lock);
}
-static inline struct file *__fget_files_rcu(struct files_struct *files,
- unsigned int fd, fmode_t mask, unsigned int refs)
-{
- for (;;) {
- struct file *file;
- struct fdtable *fdt = rcu_dereference_raw(files->fdt);
- struct file __rcu **fdentry;
-
- if (unlikely(fd >= fdt->max_fds))
- return NULL;
-
- fdentry = fdt->fd + array_index_nospec(fd, fdt->max_fds);
- file = rcu_dereference_raw(*fdentry);
- if (unlikely(!file))
- return NULL;
-
- if (unlikely(file->f_mode & mask))
- return NULL;
-
- /*
- * Ok, we have a file pointer. However, because we do
- * this all locklessly under RCU, we may be racing with
- * that file being closed.
- *
- * Such a race can take two forms:
- *
- * (a) the file ref already went down to zero,
- * and get_file_rcu_many() fails. Just try
- * again:
- */
- if (unlikely(!get_file_rcu_many(file, refs)))
- continue;
-
- /*
- * (b) the file table entry has changed under us.
- * Note that we don't need to re-check the 'fdt->fd'
- * pointer having changed, because it always goes
- * hand-in-hand with 'fdt'.
- *
- * If so, we need to put our refs and try again.
- */
- if (unlikely(rcu_dereference_raw(files->fdt) != fdt) ||
- unlikely(rcu_dereference_raw(*fdentry) != file)) {
- fput_many(file, refs);
- continue;
- }
-
- /*
- * Ok, we have a ref to the file, and checked that it
- * still exists.
- */
- return file;
- }
-}
-
static struct file *__fget_files(struct files_struct *files, unsigned int fd,
fmode_t mask, unsigned int refs)
{
struct file *file;
rcu_read_lock();
- file = __fget_files_rcu(files, fd, mask, refs);
+loop:
+ file = files_lookup_fd_rcu(files, fd);
+ if (file) {
+ /* File object ref couldn't be taken.
+ * dup2() atomicity guarantee is the reason
+ * we loop to catch the new file (or NULL pointer)
+ */
+ if (file->f_mode & mask)
+ file = NULL;
+ else if (!get_file_rcu_many(file, refs))
+ goto loop;
+ else if (files_lookup_fd_raw(files, fd) != file) {
+ fput_many(file, refs);
+ goto loop;
+ }
+ }
rcu_read_unlock();
return file;
@@ -963,6 +891,42 @@ struct file *fget_task(struct task_struct *task, unsigned int fd)
return file;
}
+struct file *task_lookup_fd_rcu(struct task_struct *task, unsigned int fd)
+{
+ /* Must be called with rcu_read_lock held */
+ struct files_struct *files;
+ struct file *file = NULL;
+
+ task_lock(task);
+ files = task->files;
+ if (files)
+ file = files_lookup_fd_rcu(files, fd);
+ task_unlock(task);
+
+ return file;
+}
+
+struct file *task_lookup_next_fd_rcu(struct task_struct *task, unsigned int *ret_fd)
+{
+ /* Must be called with rcu_read_lock held */
+ struct files_struct *files;
+ unsigned int fd = *ret_fd;
+ struct file *file = NULL;
+
+ task_lock(task);
+ files = task->files;
+ if (files) {
+ for (; fd < files_fdtable(files)->max_fds; fd++) {
+ file = files_lookup_fd_rcu(files, fd);
+ if (file)
+ break;
+ }
+ }
+ task_unlock(task);
+ *ret_fd = fd;
+ return file;
+}
+
/*
* Lightweight file lookup - no refcnt increment if fd table isn't shared.
*
@@ -985,7 +949,7 @@ static unsigned long __fget_light(unsigned int fd, fmode_t mask)
struct file *file;
if (atomic_read(&files->count) == 1) {
- file = __fcheck_files(files, fd);
+ file = files_lookup_fd_raw(files, fd);
if (!file || unlikely(file->f_mode & mask))
return 0;
return (unsigned long)file;
@@ -1121,7 +1085,7 @@ int replace_fd(unsigned fd, struct file *file, unsigned flags)
struct files_struct *files = current->files;
if (!file)
- return __close_fd(files, fd);
+ return close_fd(fd);
if (fd >= rlimit(RLIMIT_NOFILE))
return -EBADF;
@@ -1210,7 +1174,7 @@ static int ksys_dup3(unsigned int oldfd, unsigned int newfd, int flags)
spin_lock(&files->file_lock);
err = expand_files(files, newfd);
- file = fcheck(oldfd);
+ file = files_lookup_fd_locked(files, oldfd);
if (unlikely(!file))
goto Ebadf;
if (unlikely(err < 0)) {
@@ -1239,7 +1203,7 @@ SYSCALL_DEFINE2(dup2, unsigned int, oldfd, unsigned int, newfd)
int retval = oldfd;
rcu_read_lock();
- if (!fcheck_files(files, oldfd))
+ if (!files_lookup_fd_rcu(files, oldfd))
retval = -EBADF;
rcu_read_unlock();
return retval;
@@ -1264,10 +1228,11 @@ SYSCALL_DEFINE1(dup, unsigned int, fildes)
int f_dupfd(unsigned int from, struct file *file, unsigned flags)
{
+ unsigned long nofile = rlimit(RLIMIT_NOFILE);
int err;
- if (from >= rlimit(RLIMIT_NOFILE))
+ if (from >= nofile)
return -EINVAL;
- err = alloc_fd(from, flags);
+ err = alloc_fd(from, nofile, flags);
if (err >= 0) {
get_file(file);
fd_install(err, file);
diff --git a/fs/init.c b/fs/init.c
index e9c320a48cf1..02723bea8499 100644
--- a/fs/init.c
+++ b/fs/init.c
@@ -49,7 +49,7 @@ int __init init_chdir(const char *filename)
error = kern_path(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
if (error)
return error;
- error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
+ error = path_permission(&path, MAY_EXEC | MAY_CHDIR);
if (!error)
set_fs_pwd(current->fs, &path);
path_put(&path);
@@ -64,7 +64,7 @@ int __init init_chroot(const char *filename)
error = kern_path(filename, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
if (error)
return error;
- error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
+ error = path_permission(&path, MAY_EXEC | MAY_CHDIR);
if (error)
goto dput_and_out;
error = -EPERM;
@@ -118,7 +118,7 @@ int __init init_eaccess(const char *filename)
error = kern_path(filename, LOOKUP_FOLLOW, &path);
if (error)
return error;
- error = inode_permission(d_inode(path.dentry), MAY_ACCESS);
+ error = path_permission(&path, MAY_ACCESS);
path_put(&path);
return error;
}
diff --git a/fs/lockd/clnt4xdr.c b/fs/lockd/clnt4xdr.c
index 7df6324ccb8a..8161667c976f 100644
--- a/fs/lockd/clnt4xdr.c
+++ b/fs/lockd/clnt4xdr.c
@@ -261,7 +261,6 @@ static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result)
u32 exclusive;
int error;
__be32 *p;
- s32 end;
memset(lock, 0, sizeof(*lock));
locks_init_lock(fl);
@@ -285,13 +284,7 @@ static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result)
fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK;
p = xdr_decode_hyper(p, &l_offset);
xdr_decode_hyper(p, &l_len);
- end = l_offset + l_len - 1;
-
- fl->fl_start = (loff_t)l_offset;
- if (l_len == 0 || end < 0)
- fl->fl_end = OFFSET_MAX;
- else
- fl->fl_end = (loff_t)end;
+ nlm4svc_set_file_lock_range(fl, l_offset, l_len);
error = 0;
out:
return error;
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index b11f2afa84f1..99fffc9cb958 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -794,9 +794,6 @@ static void nlmclnt_cancel_callback(struct rpc_task *task, void *data)
goto retry_cancel;
}
- dprintk("lockd: cancel status %u (task %u)\n",
- status, task->tk_pid);
-
switch (status) {
case NLM_LCK_GRANTED:
case NLM_LCK_DENIED_GRACE_PERIOD:
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 771c289f6df7..cdc8e12cdac4 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -163,8 +163,8 @@ static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni,
host->h_nsmhandle = nsm;
host->h_addrbuf = nsm->sm_addrbuf;
host->net = ni->net;
- host->h_cred = get_cred(ni->cred),
- strlcpy(host->nodename, utsname()->nodename, sizeof(host->nodename));
+ host->h_cred = get_cred(ni->cred);
+ strscpy(host->nodename, utsname()->nodename, sizeof(host->nodename));
out:
return host;
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 1a639e34847d..5579e67da17d 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -54,13 +54,9 @@ EXPORT_SYMBOL_GPL(nlmsvc_ops);
static DEFINE_MUTEX(nlmsvc_mutex);
static unsigned int nlmsvc_users;
-static struct task_struct *nlmsvc_task;
-static struct svc_rqst *nlmsvc_rqst;
+static struct svc_serv *nlmsvc_serv;
unsigned long nlmsvc_timeout;
-static atomic_t nlm_ntf_refcnt = ATOMIC_INIT(0);
-static DECLARE_WAIT_QUEUE_HEAD(nlm_ntf_wq);
-
unsigned int lockd_net_id;
/*
@@ -184,6 +180,10 @@ lockd(void *vrqstp)
nlm_shutdown_hosts();
cancel_delayed_work_sync(&ln->grace_period_end);
locks_end_grace(&ln->lockd_manager);
+
+ dprintk("lockd_down: service stopped\n");
+
+ svc_exit_thread(rqstp);
return 0;
}
@@ -196,8 +196,8 @@ static int create_lockd_listener(struct svc_serv *serv, const char *name,
xprt = svc_find_xprt(serv, name, net, family, 0);
if (xprt == NULL)
- return svc_create_xprt(serv, name, net, family, port,
- SVC_SOCK_DEFAULTS, cred);
+ return svc_xprt_create(serv, name, net, family, port,
+ SVC_SOCK_DEFAULTS, cred);
svc_xprt_put(xprt);
return 0;
}
@@ -247,7 +247,8 @@ static int make_socks(struct svc_serv *serv, struct net *net,
if (warned++ == 0)
printk(KERN_WARNING
"lockd_up: makesock failed, error=%d\n", err);
- svc_shutdown_net(serv, net);
+ svc_xprt_destroy_all(serv, net);
+ svc_rpcb_cleanup(serv, net);
return err;
}
@@ -285,13 +286,12 @@ static void lockd_down_net(struct svc_serv *serv, struct net *net)
nlm_shutdown_hosts_net(net);
cancel_delayed_work_sync(&ln->grace_period_end);
locks_end_grace(&ln->lockd_manager);
- svc_shutdown_net(serv, net);
- dprintk("%s: per-net data destroyed; net=%x\n",
- __func__, net->ns.inum);
+ svc_xprt_destroy_all(serv, net);
+ svc_rpcb_cleanup(serv, net);
}
} else {
- pr_err("%s: no users! task=%p, net=%x\n",
- __func__, nlmsvc_task, net->ns.inum);
+ pr_err("%s: no users! net=%x\n",
+ __func__, net->ns.inum);
BUG();
}
}
@@ -302,20 +302,16 @@ static int lockd_inetaddr_event(struct notifier_block *this,
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
struct sockaddr_in sin;
- if ((event != NETDEV_DOWN) ||
- !atomic_inc_not_zero(&nlm_ntf_refcnt))
+ if (event != NETDEV_DOWN)
goto out;
- if (nlmsvc_rqst) {
+ if (nlmsvc_serv) {
dprintk("lockd_inetaddr_event: removed %pI4\n",
&ifa->ifa_local);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = ifa->ifa_local;
- svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
- (struct sockaddr *)&sin);
+ svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin);
}
- atomic_dec(&nlm_ntf_refcnt);
- wake_up(&nlm_ntf_wq);
out:
return NOTIFY_DONE;
@@ -332,21 +328,17 @@ static int lockd_inet6addr_event(struct notifier_block *this,
struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
struct sockaddr_in6 sin6;
- if ((event != NETDEV_DOWN) ||
- !atomic_inc_not_zero(&nlm_ntf_refcnt))
+ if (event != NETDEV_DOWN)
goto out;
- if (nlmsvc_rqst) {
+ if (nlmsvc_serv) {
dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = ifa->addr;
if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6.sin6_scope_id = ifa->idev->dev->ifindex;
- svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
- (struct sockaddr *)&sin6);
+ svc_age_temp_xprts_now(nlmsvc_serv, (struct sockaddr *)&sin6);
}
- atomic_dec(&nlm_ntf_refcnt);
- wake_up(&nlm_ntf_wq);
out:
return NOTIFY_DONE;
@@ -357,86 +349,14 @@ static struct notifier_block lockd_inet6addr_notifier = {
};
#endif
-static void lockd_unregister_notifiers(void)
-{
- unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
-#if IS_ENABLED(CONFIG_IPV6)
- unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
-#endif
- wait_event(nlm_ntf_wq, atomic_read(&nlm_ntf_refcnt) == 0);
-}
-
-static void lockd_svc_exit_thread(void)
-{
- atomic_dec(&nlm_ntf_refcnt);
- lockd_unregister_notifiers();
- svc_exit_thread(nlmsvc_rqst);
-}
-
-static int lockd_start_svc(struct svc_serv *serv)
+static int lockd_get(void)
{
+ struct svc_serv *serv;
int error;
- if (nlmsvc_rqst)
+ if (nlmsvc_serv) {
+ nlmsvc_users++;
return 0;
-
- /*
- * Create the kernel thread and wait for it to start.
- */
- nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
- if (IS_ERR(nlmsvc_rqst)) {
- error = PTR_ERR(nlmsvc_rqst);
- printk(KERN_WARNING
- "lockd_up: svc_rqst allocation failed, error=%d\n",
- error);
- lockd_unregister_notifiers();
- goto out_rqst;
- }
-
- atomic_inc(&nlm_ntf_refcnt);
- svc_sock_update_bufs(serv);
- serv->sv_maxconn = nlm_max_connections;
-
- nlmsvc_task = kthread_create(lockd, nlmsvc_rqst, "%s", serv->sv_name);
- if (IS_ERR(nlmsvc_task)) {
- error = PTR_ERR(nlmsvc_task);
- printk(KERN_WARNING
- "lockd_up: kthread_run failed, error=%d\n", error);
- goto out_task;
- }
- nlmsvc_rqst->rq_task = nlmsvc_task;
- wake_up_process(nlmsvc_task);
-
- dprintk("lockd_up: service started\n");
- return 0;
-
-out_task:
- lockd_svc_exit_thread();
- nlmsvc_task = NULL;
-out_rqst:
- nlmsvc_rqst = NULL;
- return error;
-}
-
-static const struct svc_serv_ops lockd_sv_ops = {
- .svo_shutdown = svc_rpcb_cleanup,
- .svo_enqueue_xprt = svc_xprt_do_enqueue,
-};
-
-static struct svc_serv *lockd_create_svc(void)
-{
- struct svc_serv *serv;
-
- /*
- * Check whether we're already up and running.
- */
- if (nlmsvc_rqst) {
- /*
- * Note: increase service usage, because later in case of error
- * svc_destroy() will be called.
- */
- svc_get(nlmsvc_rqst->rq_server);
- return nlmsvc_rqst->rq_server;
}
/*
@@ -451,17 +371,44 @@ static struct svc_serv *lockd_create_svc(void)
nlm_timeout = LOCKD_DFLT_TIMEO;
nlmsvc_timeout = nlm_timeout * HZ;
- serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, &lockd_sv_ops);
+ serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, lockd);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
}
+
+ serv->sv_maxconn = nlm_max_connections;
+ error = svc_set_num_threads(serv, NULL, 1);
+ /* The thread now holds the only reference */
+ svc_put(serv);
+ if (error < 0)
+ return error;
+
+ nlmsvc_serv = serv;
register_inetaddr_notifier(&lockd_inetaddr_notifier);
#if IS_ENABLED(CONFIG_IPV6)
register_inet6addr_notifier(&lockd_inet6addr_notifier);
#endif
dprintk("lockd_up: service created\n");
- return serv;
+ nlmsvc_users++;
+ return 0;
+}
+
+static void lockd_put(void)
+{
+ if (WARN(nlmsvc_users <= 0, "lockd_down: no users!\n"))
+ return;
+ if (--nlmsvc_users)
+ return;
+
+ unregister_inetaddr_notifier(&lockd_inetaddr_notifier);
+#if IS_ENABLED(CONFIG_IPV6)
+ unregister_inet6addr_notifier(&lockd_inet6addr_notifier);
+#endif
+
+ svc_set_num_threads(nlmsvc_serv, NULL, 0);
+ nlmsvc_serv = NULL;
+ dprintk("lockd_down: service destroyed\n");
}
/*
@@ -469,36 +416,21 @@ static struct svc_serv *lockd_create_svc(void)
*/
int lockd_up(struct net *net, const struct cred *cred)
{
- struct svc_serv *serv;
int error;
mutex_lock(&nlmsvc_mutex);
- serv = lockd_create_svc();
- if (IS_ERR(serv)) {
- error = PTR_ERR(serv);
- goto err_create;
- }
+ error = lockd_get();
+ if (error)
+ goto err;
- error = lockd_up_net(serv, net, cred);
+ error = lockd_up_net(nlmsvc_serv, net, cred);
if (error < 0) {
- lockd_unregister_notifiers();
- goto err_put;
+ lockd_put();
+ goto err;
}
- error = lockd_start_svc(serv);
- if (error < 0) {
- lockd_down_net(serv, net);
- goto err_put;
- }
- nlmsvc_users++;
- /*
- * Note: svc_serv structures have an initial use count of 1,
- * so we exit through here on both success and failure.
- */
-err_put:
- svc_destroy(serv);
-err_create:
+err:
mutex_unlock(&nlmsvc_mutex);
return error;
}
@@ -511,27 +443,8 @@ void
lockd_down(struct net *net)
{
mutex_lock(&nlmsvc_mutex);
- lockd_down_net(nlmsvc_rqst->rq_server, net);
- if (nlmsvc_users) {
- if (--nlmsvc_users)
- goto out;
- } else {
- printk(KERN_ERR "lockd_down: no users! task=%p\n",
- nlmsvc_task);
- BUG();
- }
-
- if (!nlmsvc_task) {
- printk(KERN_ERR "lockd_down: no lockd running.\n");
- BUG();
- }
- kthread_stop(nlmsvc_task);
- dprintk("lockd_down: service stopped\n");
- lockd_svc_exit_thread();
- dprintk("lockd_down: service destroyed\n");
- nlmsvc_task = NULL;
- nlmsvc_rqst = NULL;
-out:
+ lockd_down_net(nlmsvc_serv, net);
+ lockd_put();
mutex_unlock(&nlmsvc_mutex);
}
EXPORT_SYMBOL_GPL(lockd_down);
@@ -584,7 +497,7 @@ static struct ctl_table nlm_sysctls[] = {
.data = &nsm_use_hostnames,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec,
+ .proc_handler = proc_dobool,
},
{
.procname = "nsm_local_state",
@@ -649,6 +562,7 @@ static int lockd_authenticate(struct svc_rqst *rqstp)
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
case RPC_AUTH_UNIX:
+ rqstp->rq_auth_stat = rpc_auth_ok;
if (rqstp->rq_proc == 0)
return SVC_OK;
if (is_callback(rqstp->rq_proc)) {
@@ -659,6 +573,7 @@ static int lockd_authenticate(struct svc_rqst *rqstp)
}
return svc_set_client(rqstp);
}
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
return SVC_DENIED;
}
@@ -766,6 +681,44 @@ static void __exit exit_nlm(void)
module_init(init_nlm);
module_exit(exit_nlm);
+/**
+ * nlmsvc_dispatch - Process an NLM Request
+ * @rqstp: incoming request
+ * @statp: pointer to location of accept_stat field in RPC Reply buffer
+ *
+ * Return values:
+ * %0: Processing complete; do not send a Reply
+ * %1: Processing complete; send Reply in rqstp->rq_res
+ */
+static int nlmsvc_dispatch(struct svc_rqst *rqstp, __be32 *statp)
+{
+ const struct svc_procedure *procp = rqstp->rq_procinfo;
+
+ svcxdr_init_decode(rqstp);
+ if (!procp->pc_decode(rqstp, &rqstp->rq_arg_stream))
+ goto out_decode_err;
+
+ *statp = procp->pc_func(rqstp);
+ if (*statp == rpc_drop_reply)
+ return 0;
+ if (*statp != rpc_success)
+ return 1;
+
+ svcxdr_init_encode(rqstp);
+ if (!procp->pc_encode(rqstp, &rqstp->rq_res_stream))
+ goto out_encode_err;
+
+ return 1;
+
+out_decode_err:
+ *statp = rpc_garbage_args;
+ return 1;
+
+out_encode_err:
+ *statp = rpc_system_err;
+ return 1;
+}
+
/*
* Define NLM program and procedures
*/
@@ -775,6 +728,7 @@ static const struct svc_version nlmsvc_version1 = {
.vs_nproc = 17,
.vs_proc = nlmsvc_procedures,
.vs_count = nlmsvc_version1_count,
+ .vs_dispatch = nlmsvc_dispatch,
.vs_xdrsize = NLMSVC_XDRSIZE,
};
static unsigned int nlmsvc_version3_count[24];
@@ -783,6 +737,7 @@ static const struct svc_version nlmsvc_version3 = {
.vs_nproc = 24,
.vs_proc = nlmsvc_procedures,
.vs_count = nlmsvc_version3_count,
+ .vs_dispatch = nlmsvc_dispatch,
.vs_xdrsize = NLMSVC_XDRSIZE,
};
#ifdef CONFIG_LOCKD_V4
@@ -792,6 +747,7 @@ static const struct svc_version nlmsvc_version4 = {
.vs_nproc = 24,
.vs_proc = nlmsvc_procedures4,
.vs_count = nlmsvc_version4_count,
+ .vs_dispatch = nlmsvc_dispatch,
.vs_xdrsize = NLMSVC_XDRSIZE,
};
#endif
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index fa41dda39925..b72023a6b4c1 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -32,6 +32,10 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
if (!nlmsvc_ops)
return nlm_lck_denied_nolocks;
+ if (lock->lock_start > OFFSET_MAX ||
+ (lock->lock_len && ((lock->lock_len - 1) > (OFFSET_MAX - lock->lock_start))))
+ return nlm4_fbig;
+
/* Obtain host handle */
if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
|| (argp->monitor && nsm_monitor(host) < 0))
@@ -40,13 +44,21 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Obtain file pointer. Not used by FREE_ALL call. */
if (filp != NULL) {
- if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
+ int mode = lock_to_openmode(&lock->fl);
+
+ error = nlm_lookup_file(rqstp, &file, lock);
+ if (error)
goto no_locks;
*filp = file;
/* Set up the missing parts of the file_lock structure */
- lock->fl.fl_file = file->f_file;
+ lock->fl.fl_flags = FL_POSIX;
+ lock->fl.fl_file = file->f_file[mode];
lock->fl.fl_pid = current->tgid;
+ lock->fl.fl_start = (loff_t)lock->lock_start;
+ lock->fl.fl_end = lock->lock_len ?
+ (loff_t)(lock->lock_start + lock->lock_len - 1) :
+ OFFSET_MAX;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
if (!lock->fl.fl_owner) {
@@ -84,6 +96,7 @@ __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
struct nlm_args *argp = rqstp->rq_argp;
struct nlm_host *host;
struct nlm_file *file;
+ struct nlm_lockowner *test_owner;
__be32 rc = rpc_success;
dprintk("lockd: TEST4 called\n");
@@ -93,6 +106,7 @@ __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
+ test_owner = argp->lock.fl.fl_owner;
/* Now check for conflicting locks */
resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie);
if (resp->status == nlm_drop_reply)
@@ -100,7 +114,7 @@ __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
else
dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));
- nlmsvc_release_lockowner(&argp->lock);
+ nlmsvc_put_lockowner(test_owner);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
@@ -266,8 +280,6 @@ nlm4svc_proc_granted(struct svc_rqst *rqstp)
*/
static void nlm4svc_callback_exit(struct rpc_task *task, void *data)
{
- dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
- -task->tk_status);
}
static void nlm4svc_callback_release(void *data)
@@ -510,191 +522,239 @@ const struct svc_procedure nlmsvc_procedures4[24] = {
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "NULL",
},
[NLMPROC_TEST] = {
.pc_func = nlm4svc_proc_test,
.pc_decode = nlm4svc_decode_testargs,
.pc_encode = nlm4svc_encode_testres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+2+No+Rg,
+ .pc_name = "TEST",
},
[NLMPROC_LOCK] = {
.pc_func = nlm4svc_proc_lock,
.pc_decode = nlm4svc_decode_lockargs,
.pc_encode = nlm4svc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "LOCK",
},
[NLMPROC_CANCEL] = {
.pc_func = nlm4svc_proc_cancel,
.pc_decode = nlm4svc_decode_cancargs,
.pc_encode = nlm4svc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "CANCEL",
},
[NLMPROC_UNLOCK] = {
.pc_func = nlm4svc_proc_unlock,
.pc_decode = nlm4svc_decode_unlockargs,
.pc_encode = nlm4svc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "UNLOCK",
},
[NLMPROC_GRANTED] = {
.pc_func = nlm4svc_proc_granted,
.pc_decode = nlm4svc_decode_testargs,
.pc_encode = nlm4svc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "GRANTED",
},
[NLMPROC_TEST_MSG] = {
.pc_func = nlm4svc_proc_test_msg,
.pc_decode = nlm4svc_decode_testargs,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "TEST_MSG",
},
[NLMPROC_LOCK_MSG] = {
.pc_func = nlm4svc_proc_lock_msg,
.pc_decode = nlm4svc_decode_lockargs,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "LOCK_MSG",
},
[NLMPROC_CANCEL_MSG] = {
.pc_func = nlm4svc_proc_cancel_msg,
.pc_decode = nlm4svc_decode_cancargs,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "CANCEL_MSG",
},
[NLMPROC_UNLOCK_MSG] = {
.pc_func = nlm4svc_proc_unlock_msg,
.pc_decode = nlm4svc_decode_unlockargs,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNLOCK_MSG",
},
[NLMPROC_GRANTED_MSG] = {
.pc_func = nlm4svc_proc_granted_msg,
.pc_decode = nlm4svc_decode_testargs,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "GRANTED_MSG",
},
[NLMPROC_TEST_RES] = {
.pc_func = nlm4svc_proc_null,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "TEST_RES",
},
[NLMPROC_LOCK_RES] = {
.pc_func = nlm4svc_proc_null,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "LOCK_RES",
},
[NLMPROC_CANCEL_RES] = {
.pc_func = nlm4svc_proc_null,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "CANCEL_RES",
},
[NLMPROC_UNLOCK_RES] = {
.pc_func = nlm4svc_proc_null,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNLOCK_RES",
},
[NLMPROC_GRANTED_RES] = {
.pc_func = nlm4svc_proc_granted_res,
.pc_decode = nlm4svc_decode_res,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "GRANTED_RES",
},
[NLMPROC_NSM_NOTIFY] = {
.pc_func = nlm4svc_proc_sm_notify,
.pc_decode = nlm4svc_decode_reboot,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_reboot),
+ .pc_argzero = sizeof(struct nlm_reboot),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "SM_NOTIFY",
},
[17] = {
.pc_func = nlm4svc_proc_unused,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = 0,
+ .pc_name = "UNUSED",
},
[18] = {
.pc_func = nlm4svc_proc_unused,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = 0,
+ .pc_name = "UNUSED",
},
[19] = {
.pc_func = nlm4svc_proc_unused,
.pc_decode = nlm4svc_decode_void,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = 0,
+ .pc_name = "UNUSED",
},
[NLMPROC_SHARE] = {
.pc_func = nlm4svc_proc_share,
.pc_decode = nlm4svc_decode_shareargs,
.pc_encode = nlm4svc_encode_shareres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+1,
+ .pc_name = "SHARE",
},
[NLMPROC_UNSHARE] = {
.pc_func = nlm4svc_proc_unshare,
.pc_decode = nlm4svc_decode_shareargs,
.pc_encode = nlm4svc_encode_shareres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+1,
+ .pc_name = "UNSHARE",
},
[NLMPROC_NM_LOCK] = {
.pc_func = nlm4svc_proc_nm_lock,
.pc_decode = nlm4svc_decode_lockargs,
.pc_encode = nlm4svc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "NM_LOCK",
},
[NLMPROC_FREE_ALL] = {
.pc_func = nlm4svc_proc_free_all,
.pc_decode = nlm4svc_decode_notify,
.pc_encode = nlm4svc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "FREE_ALL",
},
};
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 273a81971ed5..4e30f3c50970 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -31,6 +31,7 @@
#include <linux/lockd/nlm.h>
#include <linux/lockd/lockd.h>
#include <linux/kthread.h>
+#include <linux/exportfs.h>
#define NLMDBG_FACILITY NLMDBG_SVCLOCK
@@ -339,7 +340,7 @@ nlmsvc_get_lockowner(struct nlm_lockowner *lockowner)
return lockowner;
}
-static void nlmsvc_put_lockowner(struct nlm_lockowner *lockowner)
+void nlmsvc_put_lockowner(struct nlm_lockowner *lockowner)
{
if (!refcount_dec_and_lock(&lockowner->count, &lockowner->host->h_lock))
return;
@@ -469,18 +470,27 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
struct nlm_host *host, struct nlm_lock *lock, int wait,
struct nlm_cookie *cookie, int reclaim)
{
+#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
+ struct inode *inode = nlmsvc_file_inode(file);
+#endif
struct nlm_block *block = NULL;
int error;
+ int mode;
+ int async_block = 0;
__be32 ret;
dprintk("lockd: nlmsvc_lock(%s/%ld, ty=%d, pi=%d, %Ld-%Ld, bl=%d)\n",
- locks_inode(file->f_file)->i_sb->s_id,
- locks_inode(file->f_file)->i_ino,
+ inode->i_sb->s_id, inode->i_ino,
lock->fl.fl_type, lock->fl.fl_pid,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end,
wait);
+ if (nlmsvc_file_file(file)->f_op->lock) {
+ async_block = wait;
+ wait = 0;
+ }
+
/* Lock file against concurrent access */
mutex_lock(&file->f_mutex);
/* Get existing block (in case client is busy-waiting)
@@ -524,7 +534,8 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
if (!wait)
lock->fl.fl_flags &= ~FL_SLEEP;
- error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL);
+ mode = lock_to_openmode(&lock->fl);
+ error = vfs_lock_file(file->f_file[mode], F_SETLK, &lock->fl, NULL);
lock->fl.fl_flags &= ~FL_SLEEP;
dprintk("lockd: vfs_lock_file returned %d\n", error);
@@ -540,7 +551,7 @@ nlmsvc_lock(struct svc_rqst *rqstp, struct nlm_file *file,
*/
if (wait)
break;
- ret = nlm_lck_denied;
+ ret = async_block ? nlm_lck_blocked : nlm_lck_denied;
goto out;
case FILE_LOCK_DEFERRED:
if (wait)
@@ -577,12 +588,12 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
struct nlm_lock *conflock, struct nlm_cookie *cookie)
{
int error;
+ int mode;
__be32 ret;
- struct nlm_lockowner *test_owner;
dprintk("lockd: nlmsvc_testlock(%s/%ld, ty=%d, %Ld-%Ld)\n",
- locks_inode(file->f_file)->i_sb->s_id,
- locks_inode(file->f_file)->i_ino,
+ nlmsvc_file_inode(file)->i_sb->s_id,
+ nlmsvc_file_inode(file)->i_ino,
lock->fl.fl_type,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
@@ -592,10 +603,8 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
goto out;
}
- /* If there's a conflicting lock, remember to clean up the test lock */
- test_owner = (struct nlm_lockowner *)lock->fl.fl_owner;
-
- error = vfs_test_lock(file->f_file, &lock->fl);
+ mode = lock_to_openmode(&lock->fl);
+ error = vfs_test_lock(file->f_file[mode], &lock->fl);
if (error) {
/* We can't currently deal with deferred test requests */
if (error == FILE_LOCK_DEFERRED)
@@ -622,10 +631,6 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
conflock->fl.fl_end = lock->fl.fl_end;
locks_release_private(&lock->fl);
- /* Clean up the test lock */
- lock->fl.fl_owner = NULL;
- nlmsvc_put_lockowner(test_owner);
-
ret = nlm_lck_denied;
out:
return ret;
@@ -641,11 +646,11 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
__be32
nlmsvc_unlock(struct net *net, struct nlm_file *file, struct nlm_lock *lock)
{
- int error;
+ int error = 0;
dprintk("lockd: nlmsvc_unlock(%s/%ld, pi=%d, %Ld-%Ld)\n",
- locks_inode(file->f_file)->i_sb->s_id,
- locks_inode(file->f_file)->i_ino,
+ nlmsvc_file_inode(file)->i_sb->s_id,
+ nlmsvc_file_inode(file)->i_ino,
lock->fl.fl_pid,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
@@ -654,7 +659,14 @@ nlmsvc_unlock(struct net *net, struct nlm_file *file, struct nlm_lock *lock)
nlmsvc_cancel_blocked(net, file, lock);
lock->fl.fl_type = F_UNLCK;
- error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL);
+ lock->fl.fl_file = file->f_file[O_RDONLY];
+ if (lock->fl.fl_file)
+ error = vfs_lock_file(lock->fl.fl_file, F_SETLK,
+ &lock->fl, NULL);
+ lock->fl.fl_file = file->f_file[O_WRONLY];
+ if (lock->fl.fl_file)
+ error |= vfs_lock_file(lock->fl.fl_file, F_SETLK,
+ &lock->fl, NULL);
return (error < 0)? nlm_lck_denied_nolocks : nlm_granted;
}
@@ -671,10 +683,11 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l
{
struct nlm_block *block;
int status = 0;
+ int mode;
dprintk("lockd: nlmsvc_cancel(%s/%ld, pi=%d, %Ld-%Ld)\n",
- locks_inode(file->f_file)->i_sb->s_id,
- locks_inode(file->f_file)->i_ino,
+ nlmsvc_file_inode(file)->i_sb->s_id,
+ nlmsvc_file_inode(file)->i_ino,
lock->fl.fl_pid,
(long long)lock->fl.fl_start,
(long long)lock->fl.fl_end);
@@ -686,8 +699,10 @@ nlmsvc_cancel_blocked(struct net *net, struct nlm_file *file, struct nlm_lock *l
block = nlmsvc_lookup_block(file, lock);
mutex_unlock(&file->f_mutex);
if (block != NULL) {
- vfs_cancel_lock(block->b_file->f_file,
- &block->b_call->a_args.lock.fl);
+ struct file_lock *fl = &block->b_call->a_args.lock.fl;
+
+ mode = lock_to_openmode(fl);
+ vfs_cancel_lock(block->b_file->f_file[mode], fl);
status = nlmsvc_unlink_block(block);
nlmsvc_release_block(block);
}
@@ -803,6 +818,7 @@ nlmsvc_grant_blocked(struct nlm_block *block)
{
struct nlm_file *file = block->b_file;
struct nlm_lock *lock = &block->b_call->a_args.lock;
+ int mode;
int error;
loff_t fl_start, fl_end;
@@ -828,7 +844,8 @@ nlmsvc_grant_blocked(struct nlm_block *block)
lock->fl.fl_flags |= FL_SLEEP;
fl_start = lock->fl.fl_start;
fl_end = lock->fl.fl_end;
- error = vfs_lock_file(file->f_file, F_SETLK, &lock->fl, NULL);
+ mode = lock_to_openmode(&lock->fl);
+ error = vfs_lock_file(file->f_file[mode], F_SETLK, &lock->fl, NULL);
lock->fl.fl_flags &= ~FL_SLEEP;
lock->fl.fl_start = fl_start;
lock->fl.fl_end = fl_end;
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 50855f2c1f4b..32784f508c81 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -55,6 +55,7 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_host *host = NULL;
struct nlm_file *file = NULL;
struct nlm_lock *lock = &argp->lock;
+ int mode;
__be32 error = 0;
/* nfsd callbacks must have been installed for this procedure */
@@ -69,13 +70,15 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
/* Obtain file pointer. Not used by FREE_ALL call. */
if (filp != NULL) {
- error = cast_status(nlm_lookup_file(rqstp, &file, &lock->fh));
+ error = cast_status(nlm_lookup_file(rqstp, &file, lock));
if (error != 0)
goto no_locks;
*filp = file;
/* Set up the missing parts of the file_lock structure */
- lock->fl.fl_file = file->f_file;
+ mode = lock_to_openmode(&lock->fl);
+ lock->fl.fl_flags = FL_POSIX;
+ lock->fl.fl_file = file->f_file[mode];
lock->fl.fl_pid = current->tgid;
lock->fl.fl_lmops = &nlmsvc_lock_operations;
nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
@@ -114,6 +117,7 @@ __nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
struct nlm_args *argp = rqstp->rq_argp;
struct nlm_host *host;
struct nlm_file *file;
+ struct nlm_lockowner *test_owner;
__be32 rc = rpc_success;
dprintk("lockd: TEST called\n");
@@ -123,6 +127,8 @@ __nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;
+ test_owner = argp->lock.fl.fl_owner;
+
/* Now check for conflicting locks */
resp->status = cast_status(nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie));
if (resp->status == nlm_drop_reply)
@@ -131,7 +137,7 @@ __nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
dprintk("lockd: TEST status %d vers %d\n",
ntohl(resp->status), rqstp->rq_vers);
- nlmsvc_release_lockowner(&argp->lock);
+ nlmsvc_put_lockowner(test_owner);
nlmsvc_release_host(host);
nlm_release_file(file);
return rc;
@@ -299,8 +305,6 @@ nlmsvc_proc_granted(struct svc_rqst *rqstp)
*/
static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
{
- dprintk("lockd: %5u callback returned %d\n", task->tk_pid,
- -task->tk_status);
}
void nlmsvc_release_call(struct nlm_rqst *call)
@@ -552,191 +556,239 @@ const struct svc_procedure nlmsvc_procedures[24] = {
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "NULL",
},
[NLMPROC_TEST] = {
.pc_func = nlmsvc_proc_test,
.pc_decode = nlmsvc_decode_testargs,
.pc_encode = nlmsvc_encode_testres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+2+No+Rg,
+ .pc_name = "TEST",
},
[NLMPROC_LOCK] = {
.pc_func = nlmsvc_proc_lock,
.pc_decode = nlmsvc_decode_lockargs,
.pc_encode = nlmsvc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "LOCK",
},
[NLMPROC_CANCEL] = {
.pc_func = nlmsvc_proc_cancel,
.pc_decode = nlmsvc_decode_cancargs,
.pc_encode = nlmsvc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "CANCEL",
},
[NLMPROC_UNLOCK] = {
.pc_func = nlmsvc_proc_unlock,
.pc_decode = nlmsvc_decode_unlockargs,
.pc_encode = nlmsvc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "UNLOCK",
},
[NLMPROC_GRANTED] = {
.pc_func = nlmsvc_proc_granted,
.pc_decode = nlmsvc_decode_testargs,
.pc_encode = nlmsvc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "GRANTED",
},
[NLMPROC_TEST_MSG] = {
.pc_func = nlmsvc_proc_test_msg,
.pc_decode = nlmsvc_decode_testargs,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "TEST_MSG",
},
[NLMPROC_LOCK_MSG] = {
.pc_func = nlmsvc_proc_lock_msg,
.pc_decode = nlmsvc_decode_lockargs,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "LOCK_MSG",
},
[NLMPROC_CANCEL_MSG] = {
.pc_func = nlmsvc_proc_cancel_msg,
.pc_decode = nlmsvc_decode_cancargs,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "CANCEL_MSG",
},
[NLMPROC_UNLOCK_MSG] = {
.pc_func = nlmsvc_proc_unlock_msg,
.pc_decode = nlmsvc_decode_unlockargs,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNLOCK_MSG",
},
[NLMPROC_GRANTED_MSG] = {
.pc_func = nlmsvc_proc_granted_msg,
.pc_decode = nlmsvc_decode_testargs,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "GRANTED_MSG",
},
[NLMPROC_TEST_RES] = {
.pc_func = nlmsvc_proc_null,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "TEST_RES",
},
[NLMPROC_LOCK_RES] = {
.pc_func = nlmsvc_proc_null,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "LOCK_RES",
},
[NLMPROC_CANCEL_RES] = {
.pc_func = nlmsvc_proc_null,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "CANCEL_RES",
},
[NLMPROC_UNLOCK_RES] = {
.pc_func = nlmsvc_proc_null,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNLOCK_RES",
},
[NLMPROC_GRANTED_RES] = {
.pc_func = nlmsvc_proc_granted_res,
.pc_decode = nlmsvc_decode_res,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_res),
+ .pc_argzero = sizeof(struct nlm_res),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "GRANTED_RES",
},
[NLMPROC_NSM_NOTIFY] = {
.pc_func = nlmsvc_proc_sm_notify,
.pc_decode = nlmsvc_decode_reboot,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_reboot),
+ .pc_argzero = sizeof(struct nlm_reboot),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "SM_NOTIFY",
},
[17] = {
.pc_func = nlmsvc_proc_unused,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNUSED",
},
[18] = {
.pc_func = nlmsvc_proc_unused,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNUSED",
},
[19] = {
.pc_func = nlmsvc_proc_unused,
.pc_decode = nlmsvc_decode_void,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_void),
+ .pc_argzero = sizeof(struct nlm_void),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = St,
+ .pc_name = "UNUSED",
},
[NLMPROC_SHARE] = {
.pc_func = nlmsvc_proc_share,
.pc_decode = nlmsvc_decode_shareargs,
.pc_encode = nlmsvc_encode_shareres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+1,
+ .pc_name = "SHARE",
},
[NLMPROC_UNSHARE] = {
.pc_func = nlmsvc_proc_unshare,
.pc_decode = nlmsvc_decode_shareargs,
.pc_encode = nlmsvc_encode_shareres,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St+1,
+ .pc_name = "UNSHARE",
},
[NLMPROC_NM_LOCK] = {
.pc_func = nlmsvc_proc_nm_lock,
.pc_decode = nlmsvc_decode_lockargs,
.pc_encode = nlmsvc_encode_res,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_res),
.pc_xdrressize = Ck+St,
+ .pc_name = "NM_LOCK",
},
[NLMPROC_FREE_ALL] = {
.pc_func = nlmsvc_proc_free_all,
.pc_decode = nlmsvc_decode_notify,
.pc_encode = nlmsvc_encode_void,
.pc_argsize = sizeof(struct nlm_args),
+ .pc_argzero = sizeof(struct nlm_args),
.pc_ressize = sizeof(struct nlm_void),
.pc_xdrressize = 0,
+ .pc_name = "FREE_ALL",
},
};
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 028fc152da22..e3b6229e7ae5 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -45,7 +45,7 @@ static inline void nlm_debug_print_fh(char *msg, struct nfs_fh *f)
static inline void nlm_debug_print_file(char *msg, struct nlm_file *file)
{
- struct inode *inode = locks_inode(file->f_file);
+ struct inode *inode = nlmsvc_file_inode(file);
dprintk("lockd: %s %s/%ld\n",
msg, inode->i_sb->s_id, inode->i_ino);
@@ -71,56 +71,75 @@ static inline unsigned int file_hash(struct nfs_fh *f)
return tmp & (FILE_NRHASH - 1);
}
+int lock_to_openmode(struct file_lock *lock)
+{
+ return (lock->fl_type == F_WRLCK) ? O_WRONLY : O_RDONLY;
+}
+
+/*
+ * Open the file. Note that if we're reexporting, for example,
+ * this could block the lockd thread for a while.
+ *
+ * We have to make sure we have the right credential to open
+ * the file.
+ */
+static __be32 nlm_do_fopen(struct svc_rqst *rqstp,
+ struct nlm_file *file, int mode)
+{
+ struct file **fp = &file->f_file[mode];
+ __be32 nfserr;
+
+ if (*fp)
+ return 0;
+ nfserr = nlmsvc_ops->fopen(rqstp, &file->f_handle, fp, mode);
+ if (nfserr)
+ dprintk("lockd: open failed (error %d)\n", nfserr);
+ return nfserr;
+}
+
/*
* Lookup file info. If it doesn't exist, create a file info struct
* and open a (VFS) file for the given inode.
- *
- * FIXME:
- * Note that we open the file O_RDONLY even when creating write locks.
- * This is not quite right, but for now, we assume the client performs
- * the proper R/W checking.
*/
__be32
nlm_lookup_file(struct svc_rqst *rqstp, struct nlm_file **result,
- struct nfs_fh *f)
+ struct nlm_lock *lock)
{
struct nlm_file *file;
unsigned int hash;
__be32 nfserr;
+ int mode;
- nlm_debug_print_fh("nlm_lookup_file", f);
+ nlm_debug_print_fh("nlm_lookup_file", &lock->fh);
- hash = file_hash(f);
+ hash = file_hash(&lock->fh);
+ mode = lock_to_openmode(&lock->fl);
/* Lock file table */
mutex_lock(&nlm_file_mutex);
hlist_for_each_entry(file, &nlm_files[hash], f_list)
- if (!nfs_compare_fh(&file->f_handle, f))
+ if (!nfs_compare_fh(&file->f_handle, &lock->fh)) {
+ mutex_lock(&file->f_mutex);
+ nfserr = nlm_do_fopen(rqstp, file, mode);
+ mutex_unlock(&file->f_mutex);
goto found;
-
- nlm_debug_print_fh("creating file for", f);
+ }
+ nlm_debug_print_fh("creating file for", &lock->fh);
nfserr = nlm_lck_denied_nolocks;
file = kzalloc(sizeof(*file), GFP_KERNEL);
if (!file)
- goto out_unlock;
+ goto out_free;
- memcpy(&file->f_handle, f, sizeof(struct nfs_fh));
+ memcpy(&file->f_handle, &lock->fh, sizeof(struct nfs_fh));
mutex_init(&file->f_mutex);
INIT_HLIST_NODE(&file->f_list);
INIT_LIST_HEAD(&file->f_blocks);
- /* Open the file. Note that this must not sleep for too long, else
- * we would lock up lockd:-) So no NFS re-exports, folks.
- *
- * We have to make sure we have the right credential to open
- * the file.
- */
- if ((nfserr = nlmsvc_ops->fopen(rqstp, f, &file->f_file)) != 0) {
- dprintk("lockd: open failed (error %d)\n", nfserr);
- goto out_free;
- }
+ nfserr = nlm_do_fopen(rqstp, file, mode);
+ if (nfserr)
+ goto out_unlock;
hlist_add_head(&file->f_list, &nlm_files[hash]);
@@ -128,7 +147,6 @@ nlm_lookup_file(struct svc_rqst *rqstp, struct nlm_file **result,
dprintk("lockd: found file %p (count %d)\n", file, file->f_count);
*result = file;
file->f_count++;
- nfserr = 0;
out_unlock:
mutex_unlock(&nlm_file_mutex);
@@ -148,13 +166,40 @@ nlm_delete_file(struct nlm_file *file)
nlm_debug_print_file("closing file", file);
if (!hlist_unhashed(&file->f_list)) {
hlist_del(&file->f_list);
- nlmsvc_ops->fclose(file->f_file);
+ if (file->f_file[O_RDONLY])
+ nlmsvc_ops->fclose(file->f_file[O_RDONLY]);
+ if (file->f_file[O_WRONLY])
+ nlmsvc_ops->fclose(file->f_file[O_WRONLY]);
kfree(file);
} else {
printk(KERN_WARNING "lockd: attempt to release unknown file!\n");
}
}
+static int nlm_unlock_files(struct nlm_file *file, const struct file_lock *fl)
+{
+ struct file_lock lock;
+
+ locks_init_lock(&lock);
+ lock.fl_type = F_UNLCK;
+ lock.fl_start = 0;
+ lock.fl_end = OFFSET_MAX;
+ lock.fl_owner = fl->fl_owner;
+ lock.fl_pid = fl->fl_pid;
+ lock.fl_flags = FL_POSIX;
+
+ lock.fl_file = file->f_file[O_RDONLY];
+ if (lock.fl_file && vfs_lock_file(lock.fl_file, F_SETLK, &lock, NULL))
+ goto out_err;
+ lock.fl_file = file->f_file[O_WRONLY];
+ if (lock.fl_file && vfs_lock_file(lock.fl_file, F_SETLK, &lock, NULL))
+ goto out_err;
+ return 0;
+out_err:
+ pr_warn("lockd: unlock failure in %s:%d\n", __FILE__, __LINE__);
+ return 1;
+}
+
/*
* Loop over all locks on the given file and perform the specified
* action.
@@ -165,7 +210,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
- struct file_lock_context *flctx = inode->i_flctx;
+ struct file_lock_context *flctx = locks_inode_context(inode);
struct nlm_host *lockhost;
if (!flctx || list_empty_careful(&flctx->flc_posix))
@@ -182,17 +227,10 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
lockhost = ((struct nlm_lockowner *)fl->fl_owner)->host;
if (match(lockhost, host)) {
- struct file_lock lock = *fl;
spin_unlock(&flctx->flc_lock);
- lock.fl_type = F_UNLCK;
- lock.fl_start = 0;
- lock.fl_end = OFFSET_MAX;
- if (vfs_lock_file(file->f_file, F_SETLK, &lock, NULL) < 0) {
- printk("lockd: unlock failure in %s:%d\n",
- __FILE__, __LINE__);
+ if (nlm_unlock_files(file, fl))
return 1;
- }
goto again;
}
}
@@ -227,7 +265,7 @@ nlm_file_inuse(struct nlm_file *file)
{
struct inode *inode = nlmsvc_file_inode(file);
struct file_lock *fl;
- struct file_lock_context *flctx = inode->i_flctx;
+ struct file_lock_context *flctx = locks_inode_context(inode);
if (file->f_count || !list_empty(&file->f_blocks) || file->f_shares)
return 1;
@@ -246,6 +284,14 @@ nlm_file_inuse(struct nlm_file *file)
return 0;
}
+static void nlm_close_files(struct nlm_file *file)
+{
+ if (file->f_file[O_RDONLY])
+ nlmsvc_ops->fclose(file->f_file[O_RDONLY]);
+ if (file->f_file[O_WRONLY])
+ nlmsvc_ops->fclose(file->f_file[O_WRONLY]);
+}
+
/*
* Loop over all files in the file table.
*/
@@ -276,7 +322,7 @@ nlm_traverse_files(void *data, nlm_host_match_fn_t match,
if (list_empty(&file->f_blocks) && !file->f_locks
&& !file->f_shares && !file->f_count) {
hlist_del(&file->f_list);
- nlmsvc_ops->fclose(file->f_file);
+ nlm_close_files(file);
kfree(file);
}
}
@@ -410,12 +456,13 @@ nlmsvc_invalidate_all(void)
nlm_traverse_files(NULL, nlmsvc_is_client, NULL);
}
+
static int
nlmsvc_match_sb(void *datap, struct nlm_file *file)
{
struct super_block *sb = datap;
- return sb == locks_inode(file->f_file)->i_sb;
+ return sb == nlmsvc_file_inode(file)->i_sb;
}
/**
diff --git a/fs/lockd/svcxdr.h b/fs/lockd/svcxdr.h
new file mode 100644
index 000000000000..4f1a451da5ba
--- /dev/null
+++ b/fs/lockd/svcxdr.h
@@ -0,0 +1,142 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Encode/decode NLM basic data types
+ *
+ * Basic NLMv3 XDR data types are not defined in an IETF standards
+ * document. X/Open has a description of these data types that
+ * is useful. See Chapter 10 of "Protocols for Interworking:
+ * XNFS, Version 3W".
+ *
+ * Basic NLMv4 XDR data types are defined in Appendix II.1.4 of
+ * RFC 1813: "NFS Version 3 Protocol Specification".
+ *
+ * Author: Chuck Lever <chuck.lever@...cle.com>
+ *
+ * Copyright (c) 2020, Oracle and/or its affiliates.
+ */
+
+#ifndef _LOCKD_SVCXDR_H_
+#define _LOCKD_SVCXDR_H_
+
+static inline bool
+svcxdr_decode_stats(struct xdr_stream *xdr, __be32 *status)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, XDR_UNIT);
+ if (!p)
+ return false;
+ *status = *p;
+
+ return true;
+}
+
+static inline bool
+svcxdr_encode_stats(struct xdr_stream *xdr, __be32 status)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT);
+ if (!p)
+ return false;
+ *p = status;
+
+ return true;
+}
+
+static inline bool
+svcxdr_decode_string(struct xdr_stream *xdr, char **data, unsigned int *data_len)
+{
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > NLM_MAXSTRLEN)
+ return false;
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ *data_len = len;
+ *data = (char *)p;
+
+ return true;
+}
+
+/*
+ * NLM cookies are defined by specification to be a variable-length
+ * XDR opaque no longer than 1024 bytes. However, this implementation
+ * limits their length to 32 bytes, and treats zero-length cookies
+ * specially.
+ */
+static inline bool
+svcxdr_decode_cookie(struct xdr_stream *xdr, struct nlm_cookie *cookie)
+{
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > NLM_MAXCOOKIELEN)
+ return false;
+ if (!len)
+ goto out_hpux;
+
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ cookie->len = len;
+ memcpy(cookie->data, p, len);
+
+ return true;
+
+ /* apparently HPUX can return empty cookies */
+out_hpux:
+ cookie->len = 4;
+ memset(cookie->data, 0, 4);
+ return true;
+}
+
+static inline bool
+svcxdr_encode_cookie(struct xdr_stream *xdr, const struct nlm_cookie *cookie)
+{
+ __be32 *p;
+
+ if (xdr_stream_encode_u32(xdr, cookie->len) < 0)
+ return false;
+ p = xdr_reserve_space(xdr, cookie->len);
+ if (!p)
+ return false;
+ memcpy(p, cookie->data, cookie->len);
+
+ return true;
+}
+
+static inline bool
+svcxdr_decode_owner(struct xdr_stream *xdr, struct xdr_netobj *obj)
+{
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > XDR_MAX_NETOBJ)
+ return false;
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ obj->len = len;
+ obj->data = (u8 *)p;
+
+ return true;
+}
+
+static inline bool
+svcxdr_encode_owner(struct xdr_stream *xdr, const struct xdr_netobj *obj)
+{
+ if (obj->len > XDR_MAX_NETOBJ)
+ return false;
+ return xdr_stream_encode_opaque(xdr, obj->data, obj->len) > 0;
+}
+
+#endif /* _LOCKD_SVCXDR_H_ */
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 982629f7b120..2fb5748dae0c 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -19,7 +19,7 @@
#include <uapi/linux/nfs2.h>
-#define NLMDBG_FACILITY NLMDBG_XDR
+#include "svcxdr.h"
static inline loff_t
@@ -42,311 +42,313 @@ loff_t_to_s32(loff_t offset)
}
/*
- * XDR functions for basic NLM types
+ * NLM file handles are defined by specification to be a variable-length
+ * XDR opaque no longer than 1024 bytes. However, this implementation
+ * constrains their length to exactly the length of an NFSv2 file
+ * handle.
*/
-static __be32 *nlm_decode_cookie(__be32 *p, struct nlm_cookie *c)
+static bool
+svcxdr_decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
{
- unsigned int len;
-
- len = ntohl(*p++);
-
- if(len==0)
- {
- c->len=4;
- memset(c->data, 0, 4); /* hockeypux brain damage */
- }
- else if(len<=NLM_MAXCOOKIELEN)
- {
- c->len=len;
- memcpy(c->data, p, len);
- p+=XDR_QUADLEN(len);
- }
- else
- {
- dprintk("lockd: bad cookie size %d (only cookies under "
- "%d bytes are supported.)\n",
- len, NLM_MAXCOOKIELEN);
- return NULL;
- }
- return p;
-}
-
-static inline __be32 *
-nlm_encode_cookie(__be32 *p, struct nlm_cookie *c)
-{
- *p++ = htonl(c->len);
- memcpy(p, c->data, c->len);
- p+=XDR_QUADLEN(c->len);
- return p;
-}
-
-static __be32 *
-nlm_decode_fh(__be32 *p, struct nfs_fh *f)
-{
- unsigned int len;
-
- if ((len = ntohl(*p++)) != NFS2_FHSIZE) {
- dprintk("lockd: bad fhandle size %d (should be %d)\n",
- len, NFS2_FHSIZE);
- return NULL;
- }
- f->size = NFS2_FHSIZE;
- memset(f->data, 0, sizeof(f->data));
- memcpy(f->data, p, NFS2_FHSIZE);
- return p + XDR_QUADLEN(NFS2_FHSIZE);
-}
-
-/*
- * Encode and decode owner handle
- */
-static inline __be32 *
-nlm_decode_oh(__be32 *p, struct xdr_netobj *oh)
-{
- return xdr_decode_netobj(p, oh);
-}
-
-static inline __be32 *
-nlm_encode_oh(__be32 *p, struct xdr_netobj *oh)
-{
- return xdr_encode_netobj(p, oh);
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len != NFS2_FHSIZE)
+ return false;
+
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ fh->size = NFS2_FHSIZE;
+ memcpy(fh->data, p, len);
+ memset(fh->data + NFS2_FHSIZE, 0, sizeof(fh->data) - NFS2_FHSIZE);
+
+ return true;
}
-static __be32 *
-nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
+static bool
+svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
{
- struct file_lock *fl = &lock->fl;
- s32 start, len, end;
-
- if (!(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len,
- NLM_MAXSTRLEN))
- || !(p = nlm_decode_fh(p, &lock->fh))
- || !(p = nlm_decode_oh(p, &lock->oh)))
- return NULL;
- lock->svid = ntohl(*p++);
+ struct file_lock *fl = &lock->fl;
+ s32 start, len, end;
+
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return false;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &lock->svid) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &start) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
locks_init_lock(fl);
fl->fl_flags = FL_POSIX;
- fl->fl_type = F_RDLCK; /* as good as anything else */
- start = ntohl(*p++);
- len = ntohl(*p++);
+ fl->fl_type = F_RDLCK;
end = start + len - 1;
-
fl->fl_start = s32_to_loff_t(start);
-
if (len == 0 || end < 0)
fl->fl_end = OFFSET_MAX;
else
fl->fl_end = s32_to_loff_t(end);
- return p;
+
+ return true;
}
-/*
- * Encode result of a TEST/TEST_MSG call
- */
-static __be32 *
-nlm_encode_testres(__be32 *p, struct nlm_res *resp)
+static bool
+svcxdr_encode_holder(struct xdr_stream *xdr, const struct nlm_lock *lock)
{
- s32 start, len;
-
- if (!(p = nlm_encode_cookie(p, &resp->cookie)))
- return NULL;
- *p++ = resp->status;
-
- if (resp->status == nlm_lck_denied) {
- struct file_lock *fl = &resp->lock.fl;
-
- *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
- *p++ = htonl(resp->lock.svid);
-
- /* Encode owner handle. */
- if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
- return NULL;
+ const struct file_lock *fl = &lock->fl;
+ s32 start, len;
+
+ /* exclusive */
+ if (xdr_stream_encode_bool(xdr, fl->fl_type != F_RDLCK) < 0)
+ return false;
+ if (xdr_stream_encode_u32(xdr, lock->svid) < 0)
+ return false;
+ if (!svcxdr_encode_owner(xdr, &lock->oh))
+ return false;
+ start = loff_t_to_s32(fl->fl_start);
+ if (fl->fl_end == OFFSET_MAX)
+ len = 0;
+ else
+ len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
+ if (xdr_stream_encode_u32(xdr, start) < 0)
+ return false;
+ if (xdr_stream_encode_u32(xdr, len) < 0)
+ return false;
- start = loff_t_to_s32(fl->fl_start);
- if (fl->fl_end == OFFSET_MAX)
- len = 0;
- else
- len = loff_t_to_s32(fl->fl_end - fl->fl_start + 1);
+ return true;
+}
- *p++ = htonl(start);
- *p++ = htonl(len);
+static bool
+svcxdr_encode_testrply(struct xdr_stream *xdr, const struct nlm_res *resp)
+{
+ if (!svcxdr_encode_stats(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nlm_lck_denied:
+ if (!svcxdr_encode_holder(xdr, &resp->lock))
+ return false;
}
- return p;
+ return true;
}
/*
- * First, the server side XDR functions
+ * Decode Call arguments
*/
-int
-nlmsvc_decode_testargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm_decode_cookie(p, &argp->cookie)))
- return 0;
-
- exclusive = ntohl(*p++);
- if (!(p = nlm_decode_lock(p, &argp->lock)))
- return 0;
- if (exclusive)
- argp->lock.fl.fl_type = F_WRLCK;
- return xdr_argsize_check(rqstp, p);
+bool
+nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
}
-int
-nlmsvc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_args *argp = rqstp->rq_argp;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
+ if (exclusive)
+ argp->lock.fl.fl_type = F_WRLCK;
- if (!(p = nlm_encode_testres(p, resp)))
- return 0;
- return xdr_ressize_check(rqstp, p);
+ return true;
}
-int
-nlmsvc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm_decode_cookie(p, &argp->cookie)))
- return 0;
- argp->block = ntohl(*p++);
- exclusive = ntohl(*p++);
- if (!(p = nlm_decode_lock(p, &argp->lock)))
- return 0;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &argp->block) < 0)
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
if (exclusive)
argp->lock.fl.fl_type = F_WRLCK;
- argp->reclaim = ntohl(*p++);
- argp->state = ntohl(*p++);
+ if (xdr_stream_decode_bool(xdr, &argp->reclaim) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
argp->monitor = 1; /* monitor client by default */
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nlmsvc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm_decode_cookie(p, &argp->cookie)))
- return 0;
- argp->block = ntohl(*p++);
- exclusive = ntohl(*p++);
- if (!(p = nlm_decode_lock(p, &argp->lock)))
- return 0;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &argp->block) < 0)
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
if (exclusive)
argp->lock.fl.fl_type = F_WRLCK;
- return xdr_argsize_check(rqstp, p);
+
+ return true;
}
-int
-nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- if (!(p = nlm_decode_cookie(p, &argp->cookie))
- || !(p = nlm_decode_lock(p, &argp->lock)))
- return 0;
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
argp->lock.fl.fl_type = F_UNLCK;
- return xdr_argsize_check(rqstp, p);
+
+ return true;
}
-int
-nlmsvc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_args *argp = rqstp->rq_argp;
- struct nlm_lock *lock = &argp->lock;
+ struct nlm_res *resp = rqstp->rq_argp;
- memset(lock, 0, sizeof(*lock));
- locks_init_lock(&lock->fl);
- lock->svid = ~(u32) 0;
-
- if (!(p = nlm_decode_cookie(p, &argp->cookie))
- || !(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN))
- || !(p = nlm_decode_fh(p, &lock->fh))
- || !(p = nlm_decode_oh(p, &lock->oh)))
- return 0;
- argp->fsm_mode = ntohl(*p++);
- argp->fsm_access = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_cookie(xdr, &resp->cookie))
+ return false;
+ if (!svcxdr_decode_stats(xdr, &resp->status))
+ return false;
+
+ return true;
}
-int
-nlmsvc_encode_shareres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_reboot *argp = rqstp->rq_argp;
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > SM_MAXSTRLEN)
+ return false;
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ argp->len = len;
+ argp->mon = (char *)p;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
+ p = xdr_inline_decode(xdr, SM_PRIV_SIZE);
+ if (!p)
+ return false;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
- if (!(p = nlm_encode_cookie(p, &resp->cookie)))
- return 0;
- *p++ = resp->status;
- *p++ = xdr_zero; /* sequence argument */
- return xdr_ressize_check(rqstp, p);
+ return true;
}
-int
-nlmsvc_encode_res(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_args *argp = rqstp->rq_argp;
+ struct nlm_lock *lock = &argp->lock;
- if (!(p = nlm_encode_cookie(p, &resp->cookie)))
- return 0;
- *p++ = resp->status;
- return xdr_ressize_check(rqstp, p);
+ memset(lock, 0, sizeof(*lock));
+ locks_init_lock(&lock->fl);
+ lock->svid = ~(u32)0;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return false;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return false;
+ /* XXX: Range checks are missing in the original code */
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_mode) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_access) < 0)
+ return false;
+
+ return true;
}
-int
-nlmsvc_decode_notify(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
struct nlm_lock *lock = &argp->lock;
- if (!(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN)))
- return 0;
- argp->state = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
+
+ return true;
}
-int
-nlmsvc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nlm_reboot *argp = rqstp->rq_argp;
- if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
- return 0;
- argp->state = ntohl(*p++);
- memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
- p += XDR_QUADLEN(SM_PRIV_SIZE);
- return xdr_argsize_check(rqstp, p);
+/*
+ * Encode Reply results
+ */
+
+bool
+nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
}
-int
-nlmsvc_decode_res(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_argp;
+ struct nlm_res *resp = rqstp->rq_resp;
- if (!(p = nlm_decode_cookie(p, &resp->cookie)))
- return 0;
- resp->status = *p++;
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_encode_cookie(xdr, &resp->cookie) &&
+ svcxdr_encode_testrply(xdr, resp);
}
-int
-nlmsvc_decode_void(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- return xdr_argsize_check(rqstp, p);
+ struct nlm_res *resp = rqstp->rq_resp;
+
+ return svcxdr_encode_cookie(xdr, &resp->cookie) &&
+ svcxdr_encode_stats(xdr, resp->status);
}
-int
-nlmsvc_encode_void(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- return xdr_ressize_check(rqstp, p);
+ struct nlm_res *resp = rqstp->rq_resp;
+
+ if (!svcxdr_encode_cookie(xdr, &resp->cookie))
+ return false;
+ if (!svcxdr_encode_stats(xdr, resp->status))
+ return false;
+ /* sequence */
+ if (xdr_stream_encode_u32(xdr, 0) < 0)
+ return false;
+
+ return true;
}
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 5fa9f48a9dba..5fcbf30cd275 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -18,14 +18,7 @@
#include <linux/sunrpc/stats.h>
#include <linux/lockd/lockd.h>
-#define NLMDBG_FACILITY NLMDBG_XDR
-
-static inline loff_t
-s64_to_loff_t(__s64 offset)
-{
- return (loff_t)offset;
-}
-
+#include "svcxdr.h"
static inline s64
loff_t_to_s64(loff_t offset)
@@ -40,310 +33,317 @@ loff_t_to_s64(loff_t offset)
return res;
}
-/*
- * XDR functions for basic NLM types
- */
-static __be32 *
-nlm4_decode_cookie(__be32 *p, struct nlm_cookie *c)
-{
- unsigned int len;
-
- len = ntohl(*p++);
-
- if(len==0)
- {
- c->len=4;
- memset(c->data, 0, 4); /* hockeypux brain damage */
- }
- else if(len<=NLM_MAXCOOKIELEN)
- {
- c->len=len;
- memcpy(c->data, p, len);
- p+=XDR_QUADLEN(len);
- }
- else
- {
- dprintk("lockd: bad cookie size %d (only cookies under "
- "%d bytes are supported.)\n",
- len, NLM_MAXCOOKIELEN);
- return NULL;
- }
- return p;
-}
-
-static __be32 *
-nlm4_encode_cookie(__be32 *p, struct nlm_cookie *c)
+void nlm4svc_set_file_lock_range(struct file_lock *fl, u64 off, u64 len)
{
- *p++ = htonl(c->len);
- memcpy(p, c->data, c->len);
- p+=XDR_QUADLEN(c->len);
- return p;
-}
+ s64 end = off + len - 1;
-static __be32 *
-nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
-{
- memset(f->data, 0, sizeof(f->data));
- f->size = ntohl(*p++);
- if (f->size > NFS_MAXFHSIZE) {
- dprintk("lockd: bad fhandle size %d (should be <=%d)\n",
- f->size, NFS_MAXFHSIZE);
- return NULL;
- }
- memcpy(f->data, p, f->size);
- return p + XDR_QUADLEN(f->size);
+ fl->fl_start = off;
+ if (len == 0 || end < 0)
+ fl->fl_end = OFFSET_MAX;
+ else
+ fl->fl_end = end;
}
/*
- * Encode and decode owner handle
+ * NLM file handles are defined by specification to be a variable-length
+ * XDR opaque no longer than 1024 bytes. However, this implementation
+ * limits their length to the size of an NFSv3 file handle.
*/
-static __be32 *
-nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
+static bool
+svcxdr_decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
{
- return xdr_decode_netobj(p, oh);
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > NFS_MAXFHSIZE)
+ return false;
+
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ fh->size = len;
+ memcpy(fh->data, p, len);
+ memset(fh->data + len, 0, sizeof(fh->data) - len);
+
+ return true;
}
-static __be32 *
-nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
+static bool
+svcxdr_decode_lock(struct xdr_stream *xdr, struct nlm_lock *lock)
{
- struct file_lock *fl = &lock->fl;
- __u64 len, start;
- __s64 end;
-
- if (!(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN))
- || !(p = nlm4_decode_fh(p, &lock->fh))
- || !(p = nlm4_decode_oh(p, &lock->oh)))
- return NULL;
- lock->svid = ntohl(*p++);
+ struct file_lock *fl = &lock->fl;
+
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return false;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &lock->svid) < 0)
+ return false;
+ if (xdr_stream_decode_u64(xdr, &lock->lock_start) < 0)
+ return false;
+ if (xdr_stream_decode_u64(xdr, &lock->lock_len) < 0)
+ return false;
locks_init_lock(fl);
fl->fl_flags = FL_POSIX;
- fl->fl_type = F_RDLCK; /* as good as anything else */
- p = xdr_decode_hyper(p, &start);
- p = xdr_decode_hyper(p, &len);
- end = start + len - 1;
-
- fl->fl_start = s64_to_loff_t(start);
+ fl->fl_type = F_RDLCK;
+ nlm4svc_set_file_lock_range(fl, lock->lock_start, lock->lock_len);
+ return true;
+}
- if (len == 0 || end < 0)
- fl->fl_end = OFFSET_MAX;
+static bool
+svcxdr_encode_holder(struct xdr_stream *xdr, const struct nlm_lock *lock)
+{
+ const struct file_lock *fl = &lock->fl;
+ s64 start, len;
+
+ /* exclusive */
+ if (xdr_stream_encode_bool(xdr, fl->fl_type != F_RDLCK) < 0)
+ return false;
+ if (xdr_stream_encode_u32(xdr, lock->svid) < 0)
+ return false;
+ if (!svcxdr_encode_owner(xdr, &lock->oh))
+ return false;
+ start = loff_t_to_s64(fl->fl_start);
+ if (fl->fl_end == OFFSET_MAX)
+ len = 0;
else
- fl->fl_end = s64_to_loff_t(end);
- return p;
+ len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
+ if (xdr_stream_encode_u64(xdr, start) < 0)
+ return false;
+ if (xdr_stream_encode_u64(xdr, len) < 0)
+ return false;
+
+ return true;
}
-/*
- * Encode result of a TEST/TEST_MSG call
- */
-static __be32 *
-nlm4_encode_testres(__be32 *p, struct nlm_res *resp)
+static bool
+svcxdr_encode_testrply(struct xdr_stream *xdr, const struct nlm_res *resp)
{
- s64 start, len;
-
- dprintk("xdr: before encode_testres (p %p resp %p)\n", p, resp);
- if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
- return NULL;
- *p++ = resp->status;
-
- if (resp->status == nlm_lck_denied) {
- struct file_lock *fl = &resp->lock.fl;
-
- *p++ = (fl->fl_type == F_RDLCK)? xdr_zero : xdr_one;
- *p++ = htonl(resp->lock.svid);
-
- /* Encode owner handle. */
- if (!(p = xdr_encode_netobj(p, &resp->lock.oh)))
- return NULL;
-
- start = loff_t_to_s64(fl->fl_start);
- if (fl->fl_end == OFFSET_MAX)
- len = 0;
- else
- len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
-
- p = xdr_encode_hyper(p, start);
- p = xdr_encode_hyper(p, len);
- dprintk("xdr: encode_testres (status %u pid %d type %d start %Ld end %Ld)\n",
- resp->status, (int)resp->lock.svid, fl->fl_type,
- (long long)fl->fl_start, (long long)fl->fl_end);
+ if (!svcxdr_encode_stats(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nlm_lck_denied:
+ if (!svcxdr_encode_holder(xdr, &resp->lock))
+ return false;
}
- dprintk("xdr: after encode_testres (p %p resp %p)\n", p, resp);
- return p;
+ return true;
}
/*
- * First, the server side XDR functions
+ * Decode Call arguments
*/
-int
-nlm4svc_decode_testargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
- return 0;
-
- exclusive = ntohl(*p++);
- if (!(p = nlm4_decode_lock(p, &argp->lock)))
- return 0;
- if (exclusive)
- argp->lock.fl.fl_type = F_WRLCK;
- return xdr_argsize_check(rqstp, p);
+bool
+nlm4svc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
}
-int
-nlm4svc_encode_testres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_args *argp = rqstp->rq_argp;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
+ if (exclusive)
+ argp->lock.fl.fl_type = F_WRLCK;
- if (!(p = nlm4_encode_testres(p, resp)))
- return 0;
- return xdr_ressize_check(rqstp, p);
+ return true;
}
-int
-nlm4svc_decode_lockargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
- return 0;
- argp->block = ntohl(*p++);
- exclusive = ntohl(*p++);
- if (!(p = nlm4_decode_lock(p, &argp->lock)))
- return 0;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &argp->block) < 0)
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
if (exclusive)
argp->lock.fl.fl_type = F_WRLCK;
- argp->reclaim = ntohl(*p++);
- argp->state = ntohl(*p++);
+ if (xdr_stream_decode_bool(xdr, &argp->reclaim) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
argp->monitor = 1; /* monitor client by default */
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nlm4svc_decode_cancargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- u32 exclusive;
-
- if (!(p = nlm4_decode_cookie(p, &argp->cookie)))
- return 0;
- argp->block = ntohl(*p++);
- exclusive = ntohl(*p++);
- if (!(p = nlm4_decode_lock(p, &argp->lock)))
- return 0;
+ u32 exclusive;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (xdr_stream_decode_bool(xdr, &argp->block) < 0)
+ return false;
+ if (xdr_stream_decode_bool(xdr, &exclusive) < 0)
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
if (exclusive)
argp->lock.fl.fl_type = F_WRLCK;
- return xdr_argsize_check(rqstp, p);
+
+ return true;
}
-int
-nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
- if (!(p = nlm4_decode_cookie(p, &argp->cookie))
- || !(p = nlm4_decode_lock(p, &argp->lock)))
- return 0;
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (!svcxdr_decode_lock(xdr, &argp->lock))
+ return false;
argp->lock.fl.fl_type = F_UNLCK;
- return xdr_argsize_check(rqstp, p);
+
+ return true;
}
-int
-nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_args *argp = rqstp->rq_argp;
- struct nlm_lock *lock = &argp->lock;
+ struct nlm_res *resp = rqstp->rq_argp;
- memset(lock, 0, sizeof(*lock));
- locks_init_lock(&lock->fl);
- lock->svid = ~(u32) 0;
-
- if (!(p = nlm4_decode_cookie(p, &argp->cookie))
- || !(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN))
- || !(p = nlm4_decode_fh(p, &lock->fh))
- || !(p = nlm4_decode_oh(p, &lock->oh)))
- return 0;
- argp->fsm_mode = ntohl(*p++);
- argp->fsm_access = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_cookie(xdr, &resp->cookie))
+ return false;
+ if (!svcxdr_decode_stats(xdr, &resp->status))
+ return false;
+
+ return true;
}
-int
-nlm4svc_encode_shareres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_reboot *argp = rqstp->rq_argp;
+ __be32 *p;
+ u32 len;
+
+ if (xdr_stream_decode_u32(xdr, &len) < 0)
+ return false;
+ if (len > SM_MAXSTRLEN)
+ return false;
+ p = xdr_inline_decode(xdr, len);
+ if (!p)
+ return false;
+ argp->len = len;
+ argp->mon = (char *)p;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
+ p = xdr_inline_decode(xdr, SM_PRIV_SIZE);
+ if (!p)
+ return false;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
- if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
- return 0;
- *p++ = resp->status;
- *p++ = xdr_zero; /* sequence argument */
- return xdr_ressize_check(rqstp, p);
+ return true;
}
-int
-nlm4svc_encode_res(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_resp;
+ struct nlm_args *argp = rqstp->rq_argp;
+ struct nlm_lock *lock = &argp->lock;
- if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
- return 0;
- *p++ = resp->status;
- return xdr_ressize_check(rqstp, p);
+ memset(lock, 0, sizeof(*lock));
+ locks_init_lock(&lock->fl);
+ lock->svid = ~(u32)0;
+
+ if (!svcxdr_decode_cookie(xdr, &argp->cookie))
+ return false;
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (!svcxdr_decode_fhandle(xdr, &lock->fh))
+ return false;
+ if (!svcxdr_decode_owner(xdr, &lock->oh))
+ return false;
+ /* XXX: Range checks are missing in the original code */
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_mode) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->fsm_access) < 0)
+ return false;
+
+ return true;
}
-int
-nlm4svc_decode_notify(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nlm_args *argp = rqstp->rq_argp;
struct nlm_lock *lock = &argp->lock;
- if (!(p = xdr_decode_string_inplace(p, &lock->caller,
- &lock->len, NLM_MAXSTRLEN)))
- return 0;
- argp->state = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_string(xdr, &lock->caller, &lock->len))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->state) < 0)
+ return false;
+
+ return true;
}
-int
-nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nlm_reboot *argp = rqstp->rq_argp;
- if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
- return 0;
- argp->state = ntohl(*p++);
- memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
- p += XDR_QUADLEN(SM_PRIV_SIZE);
- return xdr_argsize_check(rqstp, p);
+/*
+ * Encode Reply results
+ */
+
+bool
+nlm4svc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
}
-int
-nlm4svc_decode_res(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nlm_res *resp = rqstp->rq_argp;
+ struct nlm_res *resp = rqstp->rq_resp;
- if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
- return 0;
- resp->status = *p++;
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_encode_cookie(xdr, &resp->cookie) &&
+ svcxdr_encode_testrply(xdr, resp);
}
-int
-nlm4svc_decode_void(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- return xdr_argsize_check(rqstp, p);
+ struct nlm_res *resp = rqstp->rq_resp;
+
+ return svcxdr_encode_cookie(xdr, &resp->cookie) &&
+ svcxdr_encode_stats(xdr, resp->status);
}
-int
-nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p)
+bool
+nlm4svc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- return xdr_ressize_check(rqstp, p);
+ struct nlm_res *resp = rqstp->rq_resp;
+
+ if (!svcxdr_encode_cookie(xdr, &resp->cookie))
+ return false;
+ if (!svcxdr_encode_stats(xdr, resp->status))
+ return false;
+ /* sequence */
+ if (xdr_stream_encode_u32(xdr, 0) < 0)
+ return false;
+
+ return true;
}
diff --git a/fs/locks.c b/fs/locks.c
index cbb5701ce9f3..b0753c8871fb 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -251,7 +251,7 @@ locks_get_lock_context(struct inode *inode, int type)
struct file_lock_context *ctx;
/* paired with cmpxchg() below */
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (likely(ctx) || type == F_UNLCK)
goto out;
@@ -270,7 +270,7 @@ locks_get_lock_context(struct inode *inode, int type)
*/
if (cmpxchg(&inode->i_flctx, NULL, ctx)) {
kmem_cache_free(flctx_cache, ctx);
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
}
out:
trace_locks_get_lock_context(inode, type, ctx);
@@ -323,7 +323,7 @@ locks_check_ctx_file_list(struct file *filp, struct list_head *list,
void
locks_free_lock_context(struct inode *inode)
{
- struct file_lock_context *ctx = inode->i_flctx;
+ struct file_lock_context *ctx = locks_inode_context(inode);
if (unlikely(ctx)) {
locks_check_ctx_lists(inode);
@@ -376,6 +376,34 @@ void locks_release_private(struct file_lock *fl)
}
EXPORT_SYMBOL_GPL(locks_release_private);
+/**
+ * locks_owner_has_blockers - Check for blocking lock requests
+ * @flctx: file lock context
+ * @owner: lock owner
+ *
+ * Return values:
+ * %true: @owner has at least one blocker
+ * %false: @owner has no blockers
+ */
+bool locks_owner_has_blockers(struct file_lock_context *flctx,
+ fl_owner_t owner)
+{
+ struct file_lock *fl;
+
+ spin_lock(&flctx->flc_lock);
+ list_for_each_entry(fl, &flctx->flc_posix, fl_list) {
+ if (fl->fl_owner != owner)
+ continue;
+ if (!list_empty(&fl->fl_blocked_requests)) {
+ spin_unlock(&flctx->flc_lock);
+ return true;
+ }
+ }
+ spin_unlock(&flctx->flc_lock);
+ return false;
+}
+EXPORT_SYMBOL_GPL(locks_owner_has_blockers);
+
/* Free a lock which is not in use. */
void locks_free_lock(struct file_lock *fl)
{
@@ -954,19 +982,32 @@ posix_test_lock(struct file *filp, struct file_lock *fl)
struct file_lock *cfl;
struct file_lock_context *ctx;
struct inode *inode = locks_inode(filp);
+ void *owner;
+ void (*func)(void);
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx || list_empty_careful(&ctx->flc_posix)) {
fl->fl_type = F_UNLCK;
return;
}
+retry:
spin_lock(&ctx->flc_lock);
list_for_each_entry(cfl, &ctx->flc_posix, fl_list) {
- if (posix_locks_conflict(fl, cfl)) {
- locks_copy_conflock(fl, cfl);
- goto out;
+ if (!posix_locks_conflict(fl, cfl))
+ continue;
+ if (cfl->fl_lmops && cfl->fl_lmops->lm_lock_expirable
+ && (*cfl->fl_lmops->lm_lock_expirable)(cfl)) {
+ owner = cfl->fl_lmops->lm_mod_owner;
+ func = cfl->fl_lmops->lm_expire_lock;
+ __module_get(owner);
+ spin_unlock(&ctx->flc_lock);
+ (*func)();
+ module_put(owner);
+ goto retry;
}
+ locks_copy_conflock(fl, cfl);
+ goto out;
}
fl->fl_type = F_UNLCK;
out:
@@ -1140,6 +1181,8 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
int error;
bool added = false;
LIST_HEAD(dispose);
+ void *owner;
+ void (*func)(void);
ctx = locks_get_lock_context(inode, request->fl_type);
if (!ctx)
@@ -1158,6 +1201,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
new_fl2 = locks_alloc_lock();
}
+retry:
percpu_down_read(&file_rwsem);
spin_lock(&ctx->flc_lock);
/*
@@ -1169,6 +1213,17 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
list_for_each_entry(fl, &ctx->flc_posix, fl_list) {
if (!posix_locks_conflict(request, fl))
continue;
+ if (fl->fl_lmops && fl->fl_lmops->lm_lock_expirable
+ && (*fl->fl_lmops->lm_lock_expirable)(fl)) {
+ owner = fl->fl_lmops->lm_mod_owner;
+ func = fl->fl_lmops->lm_expire_lock;
+ __module_get(owner);
+ spin_unlock(&ctx->flc_lock);
+ percpu_up_read(&file_rwsem);
+ (*func)();
+ module_put(owner);
+ goto retry;
+ }
if (conflock)
locks_copy_conflock(conflock, fl);
error = -EAGAIN;
@@ -1619,7 +1674,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
new_fl->fl_flags = type;
/* typically we will check that ctx is non-NULL before calling */
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx) {
WARN_ON_ONCE(1);
goto free_lock;
@@ -1724,7 +1779,7 @@ void lease_get_mtime(struct inode *inode, struct timespec64 *time)
struct file_lock_context *ctx;
struct file_lock *fl;
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (ctx && !list_empty_careful(&ctx->flc_lease)) {
spin_lock(&ctx->flc_lock);
fl = list_first_entry_or_null(&ctx->flc_lease,
@@ -1770,7 +1825,7 @@ int fcntl_getlease(struct file *filp)
int type = F_UNLCK;
LIST_HEAD(dispose);
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (ctx && !list_empty_careful(&ctx->flc_lease)) {
percpu_down_read(&file_rwsem);
spin_lock(&ctx->flc_lock);
@@ -1808,6 +1863,9 @@ check_conflicting_open(struct file *filp, const long arg, int flags)
if (flags & FL_LAYOUT)
return 0;
+ if (flags & FL_DELEG)
+ /* We leave these checks to the caller */
+ return 0;
if (arg == F_RDLCK)
return inode_is_open_for_write(inode) ? -EAGAIN : 0;
@@ -1956,7 +2014,7 @@ static int generic_delete_lease(struct file *filp, void *owner)
struct file_lock_context *ctx;
LIST_HEAD(dispose);
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx) {
trace_generic_delete_lease(inode, NULL);
return error;
@@ -2536,14 +2594,15 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
*/
if (!error && file_lock->fl_type != F_UNLCK &&
!(file_lock->fl_flags & FL_OFDLCK)) {
+ struct files_struct *files = current->files;
/*
* We need that spin_lock here - it prevents reordering between
* update of i_flctx->flc_posix and check for it done in
* close(). rcu_read_lock() wouldn't do.
*/
- spin_lock(¤t->files->file_lock);
- f = fcheck(fd);
- spin_unlock(¤t->files->file_lock);
+ spin_lock(&files->file_lock);
+ f = files_lookup_fd_locked(files, fd);
+ spin_unlock(&files->file_lock);
if (f != filp) {
file_lock->fl_type = F_UNLCK;
error = do_lock_file_wait(filp, cmd, file_lock);
@@ -2667,14 +2726,15 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
*/
if (!error && file_lock->fl_type != F_UNLCK &&
!(file_lock->fl_flags & FL_OFDLCK)) {
+ struct files_struct *files = current->files;
/*
* We need that spin_lock here - it prevents reordering between
* update of i_flctx->flc_posix and check for it done in
* close(). rcu_read_lock() wouldn't do.
*/
- spin_lock(¤t->files->file_lock);
- f = fcheck(fd);
- spin_unlock(¤t->files->file_lock);
+ spin_lock(&files->file_lock);
+ f = files_lookup_fd_locked(files, fd);
+ spin_unlock(&files->file_lock);
if (f != filp) {
file_lock->fl_type = F_UNLCK;
error = do_lock_file_wait(filp, cmd, file_lock);
@@ -2705,7 +2765,7 @@ void locks_remove_posix(struct file *filp, fl_owner_t owner)
* posix_lock_file(). Another process could be setting a lock on this
* file at the same time, but we wouldn't remove that lock anyway.
*/
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx || list_empty(&ctx->flc_posix))
return;
@@ -2778,7 +2838,7 @@ void locks_remove_file(struct file *filp)
{
struct file_lock_context *ctx;
- ctx = smp_load_acquire(&locks_inode(filp)->i_flctx);
+ ctx = locks_inode_context(locks_inode(filp));
if (!ctx)
return;
@@ -2825,7 +2885,7 @@ bool vfs_inode_has_locks(struct inode *inode)
struct file_lock_context *ctx;
bool ret;
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx)
return false;
@@ -2970,7 +3030,7 @@ void show_fd_locks(struct seq_file *f,
struct file_lock_context *ctx;
int id = 0;
- ctx = smp_load_acquire(&inode->i_flctx);
+ ctx = locks_inode_context(inode);
if (!ctx)
return;
diff --git a/fs/namei.c b/fs/namei.c
index cb37d7c477e0..72521a614514 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4277,11 +4277,14 @@ SYSCALL_DEFINE2(link, const char __user *, oldname, const char __user *, newname
* ->i_mutex on parents, which works but leads to some truly excessive
* locking].
*/
-int vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- struct inode **delegated_inode, unsigned int flags)
+int vfs_rename(struct renamedata *rd)
{
int error;
+ struct inode *old_dir = rd->old_dir, *new_dir = rd->new_dir;
+ struct dentry *old_dentry = rd->old_dentry;
+ struct dentry *new_dentry = rd->new_dentry;
+ struct inode **delegated_inode = rd->delegated_inode;
+ unsigned int flags = rd->flags;
bool is_dir = d_is_dir(old_dentry);
struct inode *source = old_dentry->d_inode;
struct inode *target = new_dentry->d_inode;
@@ -4429,6 +4432,7 @@ EXPORT_SYMBOL(vfs_rename);
int do_renameat2(int olddfd, struct filename *from, int newdfd,
struct filename *to, unsigned int flags)
{
+ struct renamedata rd;
struct dentry *old_dentry, *new_dentry;
struct dentry *trap;
struct path old_path, new_path;
@@ -4532,9 +4536,14 @@ int do_renameat2(int olddfd, struct filename *from, int newdfd,
&new_path, new_dentry, flags);
if (error)
goto exit5;
- error = vfs_rename(old_path.dentry->d_inode, old_dentry,
- new_path.dentry->d_inode, new_dentry,
- &delegated_inode, flags);
+
+ rd.old_dir = old_path.dentry->d_inode;
+ rd.old_dentry = old_dentry;
+ rd.new_dir = new_path.dentry->d_inode;
+ rd.new_dentry = new_dentry;
+ rd.delegated_inode = &delegated_inode;
+ rd.flags = flags;
+ error = vfs_rename(&rd);
exit5:
dput(new_dentry);
exit4:
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 73000aa2d220..a9e563145e0c 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -699,7 +699,7 @@ bl_alloc_lseg(struct pnfs_layout_hdr *lo, struct nfs4_layoutget_res *lgr,
xdr_init_decode_pages(&xdr, &buf,
lgr->layoutp->pages, lgr->layoutp->len);
- xdr_set_scratch_buffer(&xdr, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&xdr, scratch);
status = -EIO;
p = xdr_inline_decode(&xdr, 4);
diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c
index 6e3a14fdff9c..16412d6636e8 100644
--- a/fs/nfs/blocklayout/dev.c
+++ b/fs/nfs/blocklayout/dev.c
@@ -510,7 +510,7 @@ bl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
goto out;
xdr_init_decode_pages(&xdr, &buf, pdev->pages, pdev->pglen);
- xdr_set_scratch_buffer(&xdr, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&xdr, scratch);
p = xdr_inline_decode(&xdr, sizeof(__be32));
if (!p)
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 7817ad94a6ba..8fe143cad4a2 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -17,7 +17,6 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/freezer.h>
-#include <linux/kthread.h>
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/bc_xprt.h>
@@ -45,18 +44,18 @@ static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
int ret;
struct nfs_net *nn = net_generic(net, nfs_net_id);
- ret = svc_create_xprt(serv, "tcp", net, PF_INET,
- nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
- cred);
+ ret = svc_xprt_create(serv, "tcp", net, PF_INET,
+ nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
+ cred);
if (ret <= 0)
goto out_err;
nn->nfs_callback_tcpport = ret;
dprintk("NFS: Callback listener port = %u (af %u, net %x)\n",
nn->nfs_callback_tcpport, PF_INET, net->ns.inum);
- ret = svc_create_xprt(serv, "tcp", net, PF_INET6,
- nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
- cred);
+ ret = svc_xprt_create(serv, "tcp", net, PF_INET6,
+ nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
+ cred);
if (ret > 0) {
nn->nfs_callback_tcpport6 = ret;
dprintk("NFS: Callback listener port = %u (af %u, net %x)\n",
@@ -81,9 +80,6 @@ nfs4_callback_svc(void *vrqstp)
set_freezable();
while (!kthread_freezable_should_stop(NULL)) {
-
- if (signal_pending(current))
- flush_signals(current);
/*
* Listen for a request on the socket
*/
@@ -92,8 +88,8 @@ nfs4_callback_svc(void *vrqstp)
continue;
svc_process(rqstp);
}
+
svc_exit_thread(rqstp);
- module_put_and_exit(0);
return 0;
}
@@ -113,11 +109,7 @@ nfs41_callback_svc(void *vrqstp)
set_freezable();
while (!kthread_freezable_should_stop(NULL)) {
-
- if (signal_pending(current))
- flush_signals(current);
-
- prepare_to_wait(&serv->sv_cb_waitq, &wq, TASK_INTERRUPTIBLE);
+ prepare_to_wait(&serv->sv_cb_waitq, &wq, TASK_IDLE);
spin_lock_bh(&serv->sv_cb_lock);
if (!list_empty(&serv->sv_cb_list)) {
req = list_first_entry(&serv->sv_cb_list,
@@ -132,12 +124,12 @@ nfs41_callback_svc(void *vrqstp)
} else {
spin_unlock_bh(&serv->sv_cb_lock);
if (!kthread_should_stop())
- schedule();
+ freezable_schedule();
finish_wait(&serv->sv_cb_waitq, &wq);
}
}
+
svc_exit_thread(rqstp);
- module_put_and_exit(0);
return 0;
}
@@ -169,12 +161,12 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt,
if (nrservs < NFS4_MIN_NR_CALLBACK_THREADS)
nrservs = NFS4_MIN_NR_CALLBACK_THREADS;
- if (serv->sv_nrthreads-1 == nrservs)
+ if (serv->sv_nrthreads == nrservs)
return 0;
- ret = serv->sv_ops->svo_setup(serv, NULL, nrservs);
+ ret = svc_set_num_threads(serv, NULL, nrservs);
if (ret) {
- serv->sv_ops->svo_setup(serv, NULL, 0);
+ svc_set_num_threads(serv, NULL, 0);
return ret;
}
dprintk("nfs_callback_up: service started\n");
@@ -189,7 +181,7 @@ static void nfs_callback_down_net(u32 minorversion, struct svc_serv *serv, struc
return;
dprintk("NFS: destroy per-net callback data; net=%x\n", net->ns.inum);
- svc_shutdown_net(serv, net);
+ svc_xprt_destroy_all(serv, net);
}
static int nfs_callback_up_net(int minorversion, struct svc_serv *serv,
@@ -232,59 +224,17 @@ static int nfs_callback_up_net(int minorversion, struct svc_serv *serv,
return ret;
}
-static const struct svc_serv_ops nfs40_cb_sv_ops = {
- .svo_function = nfs4_callback_svc,
- .svo_enqueue_xprt = svc_xprt_do_enqueue,
- .svo_setup = svc_set_num_threads_sync,
- .svo_module = THIS_MODULE,
-};
-#if defined(CONFIG_NFS_V4_1)
-static const struct svc_serv_ops nfs41_cb_sv_ops = {
- .svo_function = nfs41_callback_svc,
- .svo_enqueue_xprt = svc_xprt_do_enqueue,
- .svo_setup = svc_set_num_threads_sync,
- .svo_module = THIS_MODULE,
-};
-
-static const struct svc_serv_ops *nfs4_cb_sv_ops[] = {
- [0] = &nfs40_cb_sv_ops,
- [1] = &nfs41_cb_sv_ops,
-};
-#else
-static const struct svc_serv_ops *nfs4_cb_sv_ops[] = {
- [0] = &nfs40_cb_sv_ops,
- [1] = NULL,
-};
-#endif
-
static struct svc_serv *nfs_callback_create_svc(int minorversion)
{
struct nfs_callback_data *cb_info = &nfs_callback_info[minorversion];
- const struct svc_serv_ops *sv_ops;
+ int (*threadfn)(void *data);
struct svc_serv *serv;
/*
* Check whether we're already up and running.
*/
- if (cb_info->serv) {
- /*
- * Note: increase service usage, because later in case of error
- * svc_destroy() will be called.
- */
- svc_get(cb_info->serv);
- return cb_info->serv;
- }
-
- switch (minorversion) {
- case 0:
- sv_ops = nfs4_cb_sv_ops[0];
- break;
- default:
- sv_ops = nfs4_cb_sv_ops[1];
- }
-
- if (sv_ops == NULL)
- return ERR_PTR(-ENOTSUPP);
+ if (cb_info->serv)
+ return svc_get(cb_info->serv);
/*
* Sanity check: if there's no task,
@@ -294,7 +244,16 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion)
printk(KERN_WARNING "nfs_callback_create_svc: no kthread, %d users??\n",
cb_info->users);
- serv = svc_create_pooled(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, sv_ops);
+ threadfn = nfs4_callback_svc;
+#if defined(CONFIG_NFS_V4_1)
+ if (minorversion)
+ threadfn = nfs41_callback_svc;
+#else
+ if (minorversion)
+ return ERR_PTR(-ENOTSUPP);
+#endif
+ serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE,
+ threadfn);
if (!serv) {
printk(KERN_ERR "nfs_callback_create_svc: create service failed\n");
return ERR_PTR(-ENOMEM);
@@ -335,16 +294,10 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
goto err_start;
cb_info->users++;
- /*
- * svc_create creates the svc_serv with sv_nrthreads == 1, and then
- * svc_prepare_thread increments that. So we need to call svc_destroy
- * on both success and failure so that the refcount is 1 when the
- * thread exits.
- */
err_net:
if (!cb_info->users)
cb_info->serv = NULL;
- svc_destroy(serv);
+ svc_put(serv);
err_create:
mutex_unlock(&nfs_callback_mutex);
return ret;
@@ -369,8 +322,8 @@ void nfs_callback_down(int minorversion, struct net *net)
cb_info->users--;
if (cb_info->users == 0) {
svc_get(serv);
- serv->sv_ops->svo_setup(serv, NULL, 0);
- svc_destroy(serv);
+ svc_set_num_threads(serv, NULL, 0);
+ svc_put(serv);
dprintk("nfs_callback_down: service destroyed\n");
cb_info->serv = NULL;
}
@@ -429,6 +382,8 @@ check_gss_callback_principal(struct nfs_client *clp, struct svc_rqst *rqstp)
*/
static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
+
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
@@ -439,6 +394,8 @@ static int nfs_callback_authenticate(struct svc_rqst *rqstp)
if (svc_is_backchannel(rqstp))
return SVC_DENIED;
}
+
+ rqstp->rq_auth_stat = rpc_auth_ok;
return SVC_OK;
}
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index ca8a4aa351dc..db69fc267c9a 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -63,14 +63,13 @@ static __be32 nfs4_callback_null(struct svc_rqst *rqstp)
return htonl(NFS4_OK);
}
-static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_argsize_check(rqstp, p);
-}
-
-static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p)
+/*
+ * svc_process_common() looks for an XDR encoder to know when
+ * not to drop a Reply.
+ */
+static bool nfs4_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- return xdr_ressize_check(rqstp, p);
+ return true;
}
static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len,
@@ -984,7 +983,17 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp)
out_invalidcred:
pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n");
- return svc_return_autherr(rqstp, rpc_autherr_badcred);
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
+ return rpc_success;
+}
+
+static int
+nfs_callback_dispatch(struct svc_rqst *rqstp, __be32 *statp)
+{
+ const struct svc_procedure *procp = rqstp->rq_procinfo;
+
+ *statp = procp->pc_func(rqstp);
+ return 1;
}
/*
@@ -1053,16 +1062,18 @@ static struct callback_op callback_ops[] = {
static const struct svc_procedure nfs4_callback_procedures1[] = {
[CB_NULL] = {
.pc_func = nfs4_callback_null,
- .pc_decode = nfs4_decode_void,
.pc_encode = nfs4_encode_void,
.pc_xdrressize = 1,
+ .pc_name = "NULL",
},
[CB_COMPOUND] = {
.pc_func = nfs4_callback_compound,
.pc_encode = nfs4_encode_void,
.pc_argsize = 256,
+ .pc_argzero = 256,
.pc_ressize = 256,
.pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
+ .pc_name = "COMPOUND",
}
};
@@ -1073,7 +1084,7 @@ const struct svc_version nfs4_callback_version1 = {
.vs_proc = nfs4_callback_procedures1,
.vs_count = nfs4_callback_count1,
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
- .vs_dispatch = NULL,
+ .vs_dispatch = nfs_callback_dispatch,
.vs_hidden = true,
.vs_need_cong_ctrl = true,
};
@@ -1085,7 +1096,7 @@ const struct svc_version nfs4_callback_version4 = {
.vs_proc = nfs4_callback_procedures1,
.vs_count = nfs4_callback_count4,
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
- .vs_dispatch = NULL,
+ .vs_dispatch = nfs_callback_dispatch,
.vs_hidden = true,
.vs_need_cong_ctrl = true,
};
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 9f88ca7b2001..935029632d5f 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -576,7 +576,7 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
goto out_nopages;
xdr_init_decode_pages(&stream, &buf, xdr_pages, buflen);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&stream, scratch);
do {
if (entry->label)
diff --git a/fs/nfs/export.c b/fs/nfs/export.c
index 3430d6891e89..993be63ab301 100644
--- a/fs/nfs/export.c
+++ b/fs/nfs/export.c
@@ -167,8 +167,25 @@ nfs_get_parent(struct dentry *dentry)
return parent;
}
+static u64 nfs_fetch_iversion(struct inode *inode)
+{
+ struct nfs_server *server = NFS_SERVER(inode);
+
+ if (nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
+ NFS_INO_REVAL_PAGECACHE))
+ __nfs_revalidate_inode(server, inode);
+ return inode_peek_iversion_raw(inode);
+}
+
const struct export_operations nfs_export_ops = {
.encode_fh = nfs_encode_fh,
.fh_to_dentry = nfs_fh_to_dentry,
.get_parent = nfs_get_parent,
+ .fetch_iversion = nfs_fetch_iversion,
+ .flags = EXPORT_OP_NOWCC |
+ EXPORT_OP_NOSUBTREECHK |
+ EXPORT_OP_CLOSE_BEFORE_UNLINK |
+ EXPORT_OP_REMOTE_FS |
+ EXPORT_OP_NOATOMIC_ATTR |
+ EXPORT_OP_FLUSH_ON_CLOSE,
};
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 7be1a7f7fcb2..d35aae47b062 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -798,6 +798,9 @@ int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
nfs_inc_stats(inode, NFSIOS_VFSLOCK);
+ if (fl->fl_flags & FL_RECLAIM)
+ return -ENOGRACE;
+
/* No mandatory locks over NFS */
if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
goto out_err;
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index deecfb50dd7e..2ed8b6885b09 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -293,8 +293,6 @@ static void filelayout_read_call_done(struct rpc_task *task, void *data)
{
struct nfs_pgio_header *hdr = data;
- dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
-
if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
task->tk_status == 0) {
nfs41_sequence_done(task, &hdr->res.seq_res);
@@ -666,7 +664,7 @@ filelayout_decode_layout(struct pnfs_layout_hdr *flo,
return -ENOMEM;
xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&stream, scratch);
/* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8),
* num_fh (4) */
diff --git a/fs/nfs/filelayout/filelayoutdev.c b/fs/nfs/filelayout/filelayoutdev.c
index d913e818858f..86c3f7e69ec4 100644
--- a/fs/nfs/filelayout/filelayoutdev.c
+++ b/fs/nfs/filelayout/filelayoutdev.c
@@ -82,7 +82,7 @@ nfs4_fl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
goto out_err;
xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&stream, scratch);
/* Get the stripe count (number of stripe index) */
p = xdr_inline_decode(&stream, 4);
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index e4f2820ba5a5..a263bfec4244 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -378,7 +378,7 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages,
lgr->layoutp->len);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&stream, scratch);
/* stripe unit and mirror_array_cnt */
rc = -EIO;
@@ -1419,8 +1419,6 @@ static void ff_layout_read_call_done(struct rpc_task *task, void *data)
{
struct nfs_pgio_header *hdr = data;
- dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status);
-
if (test_bit(NFS_IOHDR_REDO, &hdr->flags) &&
task->tk_status == 0) {
nfs4_sequence_done(task, &hdr->res.seq_res);
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 1f12297109b4..bfa7202ca7be 100644
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -69,7 +69,7 @@ nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
INIT_LIST_HEAD(&dsaddrs);
xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen);
- xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(&stream, scratch);
/* multipath count */
p = xdr_inline_decode(&stream, 4);
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index f2248d9d4db5..df5bee2f505c 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -1536,7 +1536,7 @@ static int nfs4_xdr_dec_listxattrs(struct rpc_rqst *rqstp,
struct compound_hdr hdr;
int status;
- xdr_set_scratch_buffer(xdr, page_address(res->scratch), PAGE_SIZE);
+ xdr_set_scratch_page(xdr, res->scratch);
status = decode_compound_hdr(xdr, &hdr);
if (status)
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index afb617a4a7e4..d8fc5d72a161 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2757,7 +2757,7 @@ static int nfs4_run_state_manager(void *ptr)
goto again;
nfs_put_client(clp);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
return 0;
}
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index f1e599553f2b..4e5c6cb770ad 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -6404,10 +6404,8 @@ nfs4_xdr_dec_getacl(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
struct compound_hdr hdr;
int status;
- if (res->acl_scratch != NULL) {
- void *p = page_address(res->acl_scratch);
- xdr_set_scratch_buffer(xdr, p, PAGE_SIZE);
- }
+ if (res->acl_scratch != NULL)
+ xdr_set_scratch_page(xdr, res->acl_scratch);
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 17fef6eb490c..d79a3b6cb070 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -870,9 +870,6 @@ static void nfs_pgio_result(struct rpc_task *task, void *calldata)
struct nfs_pgio_header *hdr = calldata;
struct inode *inode = hdr->inode;
- dprintk("NFS: %s: %5u, (status %d)\n", __func__,
- task->tk_pid, task->tk_status);
-
if (hdr->rw_ops->rw_done(task, hdr, inode) != 0)
return;
if (task->tk_status < 0)
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index b3fcc27b9564..1ffce9076060 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -86,9 +86,11 @@ const struct super_operations nfs_sops = {
};
EXPORT_SYMBOL_GPL(nfs_sops);
+#ifdef CONFIG_NFS_V4_2
static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = {
.sco_sb_deactive = nfs_sb_deactive,
};
+#endif
#if IS_ENABLED(CONFIG_NFS_V4)
static int __init register_nfs4_fs(void)
@@ -111,6 +113,7 @@ static void unregister_nfs4_fs(void)
}
#endif
+#ifdef CONFIG_NFS_V4_2
static void nfs_ssc_register_ops(void)
{
nfs_ssc_register(&nfs_ssc_clnt_ops_tbl);
@@ -120,6 +123,7 @@ static void nfs_ssc_unregister_ops(void)
{
nfs_ssc_unregister(&nfs_ssc_clnt_ops_tbl);
}
+#endif /* CONFIG_NFS_V4_2 */
static struct shrinker acl_shrinker = {
.count_objects = nfs_access_cache_count,
@@ -148,7 +152,9 @@ int __init register_nfs_fs(void)
ret = register_shrinker(&acl_shrinker);
if (ret < 0)
goto error_3;
+#ifdef CONFIG_NFS_V4_2
nfs_ssc_register_ops();
+#endif
return 0;
error_3:
nfs_unregister_sysctl();
@@ -168,7 +174,9 @@ void __exit unregister_nfs_fs(void)
unregister_shrinker(&acl_shrinker);
nfs_unregister_sysctl();
unregister_nfs4_fs();
+#ifdef CONFIG_NFS_V4_2
nfs_ssc_unregister_ops();
+#endif
unregister_filesystem(&nfs_fs_type);
}
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 4cf060691979..2bde35921f2b 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1809,9 +1809,6 @@ static void nfs_commit_done(struct rpc_task *task, void *calldata)
{
struct nfs_commit_data *data = calldata;
- dprintk("NFS: %5u nfs_commit_done (status %d)\n",
- task->tk_pid, task->tk_status);
-
/* Call the NFS version-specific code */
NFS_PROTO(data->inode)->commit_done(task, data);
trace_nfs_commit_done(task, data);
diff --git a/fs/nfs_common/Makefile b/fs/nfs_common/Makefile
index fa82f5aaa6d9..119c75ab9fd0 100644
--- a/fs/nfs_common/Makefile
+++ b/fs/nfs_common/Makefile
@@ -7,4 +7,4 @@ obj-$(CONFIG_NFS_ACL_SUPPORT) += nfs_acl.o
nfs_acl-objs := nfsacl.o
obj-$(CONFIG_GRACE_PERIOD) += grace.o
-obj-$(CONFIG_GRACE_PERIOD) += nfs_ssc.o
+obj-$(CONFIG_NFS_V4_2_SSC_HELPER) += nfs_ssc.o
diff --git a/fs/nfs_common/nfs_ssc.c b/fs/nfs_common/nfs_ssc.c
index f43bbb373913..7c1509e968c8 100644
--- a/fs/nfs_common/nfs_ssc.c
+++ b/fs/nfs_common/nfs_ssc.c
@@ -1,7 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
- * fs/nfs_common/nfs_ssc_comm.c
- *
* Helper for knfsd's SSC to access ops in NFS client modules
*
* Author: Dai Ngo <dai.ngo@...cle.com>
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index d056ad2fdefd..5a5bd85d08f8 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -136,6 +136,77 @@ int nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
}
EXPORT_SYMBOL_GPL(nfsacl_encode);
+/**
+ * nfs_stream_encode_acl - Encode an NFSv3 ACL
+ *
+ * @xdr: an xdr_stream positioned to receive an encoded ACL
+ * @inode: inode of file whose ACL this is
+ * @acl: posix_acl to encode
+ * @encode_entries: whether to encode ACEs as well
+ * @typeflag: ACL type: NFS_ACL_DEFAULT or zero
+ *
+ * Return values:
+ * %false: The ACL could not be encoded
+ * %true: @xdr is advanced to the next available position
+ */
+bool nfs_stream_encode_acl(struct xdr_stream *xdr, struct inode *inode,
+ struct posix_acl *acl, int encode_entries,
+ int typeflag)
+{
+ const size_t elem_size = XDR_UNIT * 3;
+ u32 entries = (acl && acl->a_count) ? max_t(int, acl->a_count, 4) : 0;
+ struct nfsacl_encode_desc nfsacl_desc = {
+ .desc = {
+ .elem_size = elem_size,
+ .array_len = encode_entries ? entries : 0,
+ .xcode = xdr_nfsace_encode,
+ },
+ .acl = acl,
+ .typeflag = typeflag,
+ .uid = inode->i_uid,
+ .gid = inode->i_gid,
+ };
+ struct nfsacl_simple_acl aclbuf;
+ unsigned int base;
+ int err;
+
+ if (entries > NFS_ACL_MAX_ENTRIES)
+ return false;
+ if (xdr_stream_encode_u32(xdr, entries) < 0)
+ return false;
+
+ if (encode_entries && acl && acl->a_count == 3) {
+ struct posix_acl *acl2 = &aclbuf.acl;
+
+ /* Avoid the use of posix_acl_alloc(). nfsacl_encode() is
+ * invoked in contexts where a memory allocation failure is
+ * fatal. Fortunately this fake ACL is small enough to
+ * construct on the stack. */
+ posix_acl_init(acl2, 4);
+
+ /* Insert entries in canonical order: other orders seem
+ to confuse Solaris VxFS. */
+ acl2->a_entries[0] = acl->a_entries[0]; /* ACL_USER_OBJ */
+ acl2->a_entries[1] = acl->a_entries[1]; /* ACL_GROUP_OBJ */
+ acl2->a_entries[2] = acl->a_entries[1]; /* ACL_MASK */
+ acl2->a_entries[2].e_tag = ACL_MASK;
+ acl2->a_entries[3] = acl->a_entries[2]; /* ACL_OTHER */
+ nfsacl_desc.acl = acl2;
+ }
+
+ base = xdr_stream_pos(xdr);
+ if (!xdr_reserve_space(xdr, XDR_UNIT +
+ elem_size * nfsacl_desc.desc.array_len))
+ return false;
+ err = xdr_encode_array2(xdr->buf, base, &nfsacl_desc.desc);
+ if (err)
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(nfs_stream_encode_acl);
+
+
struct nfsacl_decode_desc {
struct xdr_array2_desc desc;
unsigned int count;
@@ -295,3 +366,55 @@ int nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
nfsacl_desc.desc.array_len;
}
EXPORT_SYMBOL_GPL(nfsacl_decode);
+
+/**
+ * nfs_stream_decode_acl - Decode an NFSv3 ACL
+ *
+ * @xdr: an xdr_stream positioned at an encoded ACL
+ * @aclcnt: OUT: count of ACEs in decoded posix_acl
+ * @pacl: OUT: a dynamically-allocated buffer containing the decoded posix_acl
+ *
+ * Return values:
+ * %false: The encoded ACL is not valid
+ * %true: @pacl contains a decoded ACL, and @xdr is advanced
+ *
+ * On a successful return, caller must release *pacl using posix_acl_release().
+ */
+bool nfs_stream_decode_acl(struct xdr_stream *xdr, unsigned int *aclcnt,
+ struct posix_acl **pacl)
+{
+ const size_t elem_size = XDR_UNIT * 3;
+ struct nfsacl_decode_desc nfsacl_desc = {
+ .desc = {
+ .elem_size = elem_size,
+ .xcode = pacl ? xdr_nfsace_decode : NULL,
+ },
+ };
+ unsigned int base;
+ u32 entries;
+
+ if (xdr_stream_decode_u32(xdr, &entries) < 0)
+ return false;
+ if (entries > NFS_ACL_MAX_ENTRIES)
+ return false;
+
+ base = xdr_stream_pos(xdr);
+ if (!xdr_inline_decode(xdr, XDR_UNIT + elem_size * entries))
+ return false;
+ nfsacl_desc.desc.array_maxlen = entries;
+ if (xdr_decode_array2(xdr->buf, base, &nfsacl_desc.desc))
+ return false;
+
+ if (pacl) {
+ if (entries != nfsacl_desc.desc.array_len ||
+ posix_acl_from_nfsacl(nfsacl_desc.acl) != 0) {
+ posix_acl_release(nfsacl_desc.acl);
+ return false;
+ }
+ *pacl = nfsacl_desc.acl;
+ }
+ if (aclcnt)
+ *aclcnt = entries;
+ return true;
+}
+EXPORT_SYMBOL_GPL(nfs_stream_decode_acl);
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index 248f1459c039..6d2d498a5957 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -8,6 +8,7 @@ config NFSD
select SUNRPC
select EXPORTFS
select NFS_ACL_SUPPORT if NFSD_V2_ACL
+ select NFS_ACL_SUPPORT if NFSD_V3_ACL
depends on MULTIUSER
help
Choose Y here if you want to allow other computers to access
@@ -26,28 +27,29 @@ config NFSD
Below you can choose which versions of the NFS protocol are
available to clients mounting the NFS server on this system.
- Support for NFS version 2 (RFC 1094) is always available when
+ Support for NFS version 3 (RFC 1813) is always available when
CONFIG_NFSD is selected.
If unsure, say N.
-config NFSD_V2_ACL
- bool
- depends on NFSD
-
-config NFSD_V3
- bool "NFS server support for NFS version 3"
+config NFSD_V2
+ bool "NFS server support for NFS version 2 (DEPRECATED)"
depends on NFSD
+ default n
help
- This option enables support in your system's NFS server for
- version 3 of the NFS protocol (RFC 1813).
+ NFSv2 (RFC 1094) was the first publicly-released version of NFS.
+ Unless you are hosting ancient (1990's era) NFS clients, you don't
+ need this.
- If unsure, say Y.
+ If unsure, say N.
+
+config NFSD_V2_ACL
+ bool "NFS server support for the NFSv2 ACL protocol extension"
+ depends on NFSD_V2
config NFSD_V3_ACL
bool "NFS server support for the NFSv3 ACL protocol extension"
- depends on NFSD_V3
- select NFSD_V2_ACL
+ depends on NFSD
help
Solaris NFS servers support an auxiliary NFSv3 ACL protocol that
never became an official part of the NFS version 3 protocol.
@@ -70,13 +72,13 @@ config NFSD_V3_ACL
config NFSD_V4
bool "NFS server support for NFS version 4"
depends on NFSD && PROC_FS
- select NFSD_V3
select FS_POSIX_ACL
select SUNRPC_GSS
select CRYPTO
select CRYPTO_MD5
select CRYPTO_SHA256
select GRACE_PERIOD
+ select NFS_V4_2_SSC_HELPER if NFS_V4_2
help
This option enables support in your system's NFS server for
version 4 of the NFS protocol (RFC 3530).
@@ -98,7 +100,7 @@ config NFSD_BLOCKLAYOUT
help
This option enables support for the exporting pNFS block layouts
in the kernel's NFS server. The pNFS block layout enables NFS
- clients to directly perform I/O to block devices accesible to both
+ clients to directly perform I/O to block devices accessible to both
the server and the clients. See RFC 5663 for more details.
If unsure, say N.
@@ -112,7 +114,7 @@ config NFSD_SCSILAYOUT
help
This option enables support for the exporting pNFS SCSI layouts
in the kernel's NFS server. The pNFS SCSI layout enables NFS
- clients to directly perform I/O to SCSI devices accesible to both
+ clients to directly perform I/O to SCSI devices accessible to both
the server and the clients. See draft-ietf-nfsv4-scsi-layout for
more details.
@@ -126,7 +128,7 @@ config NFSD_FLEXFILELAYOUT
This option enables support for the exporting pNFS Flex File
layouts in the kernel's NFS server. The pNFS Flex File layout
enables NFS clients to directly perform I/O to NFSv3 devices
- accesible to both the server and the clients. See
+ accessible to both the server and the clients. See
draft-ietf-nfsv4-flex-files for more details.
Warning, this server implements the bare minimum functionality
@@ -137,7 +139,7 @@ config NFSD_FLEXFILELAYOUT
config NFSD_V4_2_INTER_SSC
bool "NFSv4.2 inter server to server COPY"
- depends on NFSD_V4 && NFS_V4_1 && NFS_V4_2
+ depends on NFSD_V4 && NFS_V4_2
help
This option enables support for NFSv4.2 inter server to
server copy where the destination server calls the NFSv4.2
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index 3f0983e93a99..6fffc8f03f74 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -10,11 +10,11 @@ obj-$(CONFIG_NFSD) += nfsd.o
# this one should be compiled first, as the tracing macros can easily blow up
nfsd-y += trace.o
-nfsd-y += nfssvc.o nfsctl.o nfsproc.o nfsfh.o vfs.o \
- export.o auth.o lockd.o nfscache.o nfsxdr.o \
- stats.o filecache.o
+nfsd-y += nfssvc.o nfsctl.o nfsfh.o vfs.o \
+ export.o auth.o lockd.o nfscache.o \
+ stats.o filecache.o nfs3proc.o nfs3xdr.o
+nfsd-$(CONFIG_NFSD_V2) += nfsproc.o nfsxdr.o
nfsd-$(CONFIG_NFSD_V2_ACL) += nfs2acl.o
-nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o
nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \
nfs4acl.o nfs4callback.o nfs4recover.o
diff --git a/fs/nfsd/acl.h b/fs/nfsd/acl.h
index ba14d2f4b64f..4b7324458a94 100644
--- a/fs/nfsd/acl.h
+++ b/fs/nfsd/acl.h
@@ -38,6 +38,8 @@
struct nfs4_acl;
struct svc_fh;
struct svc_rqst;
+struct nfsd_attrs;
+enum nfs_ftype4;
int nfs4_acl_bytes(int entries);
int nfs4_acl_get_whotype(char *, u32);
@@ -45,7 +47,7 @@ __be32 nfs4_acl_write_who(struct xdr_stream *xdr, int who);
int nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
struct nfs4_acl **acl);
-__be32 nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct nfs4_acl *acl);
+__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
+ struct nfsd_attrs *attr);
#endif /* LINUX_NFS4_ACL_H */
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index a07c39c94bbd..d91a686d2f31 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -16,6 +16,7 @@
#include "blocklayoutxdr.h"
#include "pnfs.h"
#include "filecache.h"
+#include "vfs.h"
#define NFSDDBG_FACILITY NFSDDBG_PNFS
diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c
index 2455dc8be18a..1ed2f691ebb9 100644
--- a/fs/nfsd/blocklayoutxdr.c
+++ b/fs/nfsd/blocklayoutxdr.c
@@ -9,6 +9,7 @@
#include "nfsd.h"
#include "blocklayoutxdr.h"
+#include "vfs.h"
#define NFSDDBG_FACILITY NFSDDBG_PNFS
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
index 65c331f75e9c..f21259ead64b 100644
--- a/fs/nfsd/cache.h
+++ b/fs/nfsd/cache.h
@@ -84,6 +84,6 @@ int nfsd_reply_cache_init(struct nfsd_net *);
void nfsd_reply_cache_shutdown(struct nfsd_net *);
int nfsd_cache_lookup(struct svc_rqst *);
void nfsd_cache_update(struct svc_rqst *, int, __be32 *);
-int nfsd_reply_cache_stats_open(struct inode *, struct file *);
+int nfsd_reply_cache_stats_show(struct seq_file *m, void *v);
#endif /* NFSCACHE_H */
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 21e404e7cb68..7c863f2c21e0 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -331,12 +331,29 @@ static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
fsloc->locations = NULL;
}
+static int export_stats_init(struct export_stats *stats)
+{
+ stats->start_time = ktime_get_seconds();
+ return nfsd_percpu_counters_init(stats->counter, EXP_STATS_COUNTERS_NUM);
+}
+
+static void export_stats_reset(struct export_stats *stats)
+{
+ nfsd_percpu_counters_reset(stats->counter, EXP_STATS_COUNTERS_NUM);
+}
+
+static void export_stats_destroy(struct export_stats *stats)
+{
+ nfsd_percpu_counters_destroy(stats->counter, EXP_STATS_COUNTERS_NUM);
+}
+
static void svc_export_put(struct kref *ref)
{
struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
path_put(&exp->ex_path);
auth_domain_put(exp->ex_client);
nfsd4_fslocs_free(&exp->ex_fslocs);
+ export_stats_destroy(&exp->ex_stats);
kfree(exp->ex_uuid);
kfree_rcu(exp, ex_rcu);
}
@@ -408,6 +425,12 @@ static int check_export(struct inode *inode, int *flags, unsigned char *uuid)
return -EINVAL;
}
+ if (inode->i_sb->s_export_op->flags & EXPORT_OP_NOSUBTREECHK &&
+ !(*flags & NFSEXP_NOSUBTREECHECK)) {
+ dprintk("%s: %s does not support subtree checking!\n",
+ __func__, inode->i_sb->s_type->name);
+ return -EINVAL;
+ }
return 0;
}
@@ -686,22 +709,47 @@ static void exp_flags(struct seq_file *m, int flag, int fsid,
kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fslocs);
static void show_secinfo(struct seq_file *m, struct svc_export *exp);
+static int is_export_stats_file(struct seq_file *m)
+{
+ /*
+ * The export_stats file uses the same ops as the exports file.
+ * We use the file's name to determine the reported info per export.
+ * There is no rename in nsfdfs, so d_name.name is stable.
+ */
+ return !strcmp(m->file->f_path.dentry->d_name.name, "export_stats");
+}
+
static int svc_export_show(struct seq_file *m,
struct cache_detail *cd,
struct cache_head *h)
{
- struct svc_export *exp ;
+ struct svc_export *exp;
+ bool export_stats = is_export_stats_file(m);
- if (h ==NULL) {
- seq_puts(m, "#path domain(flags)\n");
+ if (h == NULL) {
+ if (export_stats)
+ seq_puts(m, "#path domain start-time\n#\tstats\n");
+ else
+ seq_puts(m, "#path domain(flags)\n");
return 0;
}
exp = container_of(h, struct svc_export, h);
seq_path(m, &exp->ex_path, " \t\n\\");
seq_putc(m, '\t');
seq_escape(m, exp->ex_client->name, " \t\n\\");
+ if (export_stats) {
+ seq_printf(m, "\t%lld\n", exp->ex_stats.start_time);
+ seq_printf(m, "\tfh_stale: %lld\n",
+ percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_FH_STALE]));
+ seq_printf(m, "\tio_read: %lld\n",
+ percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_READ]));
+ seq_printf(m, "\tio_write: %lld\n",
+ percpu_counter_sum_positive(&exp->ex_stats.counter[EXP_STATS_IO_WRITE]));
+ seq_putc(m, '\n');
+ return 0;
+ }
seq_putc(m, '(');
- if (test_bit(CACHE_VALID, &h->flags) &&
+ if (test_bit(CACHE_VALID, &h->flags) &&
!test_bit(CACHE_NEGATIVE, &h->flags)) {
exp_flags(m, exp->ex_flags, exp->ex_fsid,
exp->ex_anon_uid, exp->ex_anon_gid, &exp->ex_fslocs);
@@ -742,6 +790,7 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
new->ex_layout_types = 0;
new->ex_uuid = NULL;
new->cd = item->cd;
+ export_stats_reset(&new->ex_stats);
}
static void export_update(struct cache_head *cnew, struct cache_head *citem)
@@ -774,10 +823,15 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
static struct cache_head *svc_export_alloc(void)
{
struct svc_export *i = kmalloc(sizeof(*i), GFP_KERNEL);
- if (i)
- return &i->h;
- else
+ if (!i)
+ return NULL;
+
+ if (export_stats_init(&i->ex_stats)) {
+ kfree(i);
return NULL;
+ }
+
+ return &i->h;
}
static const struct cache_detail svc_export_cache_template = {
@@ -1239,10 +1293,14 @@ static int e_show(struct seq_file *m, void *p)
struct cache_head *cp = p;
struct svc_export *exp = container_of(cp, struct svc_export, h);
struct cache_detail *cd = m->private;
+ bool export_stats = is_export_stats_file(m);
if (p == SEQ_START_TOKEN) {
seq_puts(m, "# Version 1.1\n");
- seq_puts(m, "# Path Client(Flags) # IPs\n");
+ if (export_stats)
+ seq_puts(m, "# Path Client Start-time\n#\tStats\n");
+ else
+ seq_puts(m, "# Path Client(Flags) # IPs\n");
return 0;
}
diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h
index e7daa1f246f0..d03f7f6a8642 100644
--- a/fs/nfsd/export.h
+++ b/fs/nfsd/export.h
@@ -6,6 +6,7 @@
#define NFSD_EXPORT_H
#include <linux/sunrpc/cache.h>
+#include <linux/percpu_counter.h>
#include <uapi/linux/nfsd/export.h>
#include <linux/nfs4.h>
@@ -46,6 +47,19 @@ struct exp_flavor_info {
u32 flags;
};
+/* Per-export stats */
+enum {
+ EXP_STATS_FH_STALE,
+ EXP_STATS_IO_READ,
+ EXP_STATS_IO_WRITE,
+ EXP_STATS_COUNTERS_NUM
+};
+
+struct export_stats {
+ time64_t start_time;
+ struct percpu_counter counter[EXP_STATS_COUNTERS_NUM];
+};
+
struct svc_export {
struct cache_head h;
struct auth_domain * ex_client;
@@ -62,6 +76,7 @@ struct svc_export {
struct nfsd4_deviceid_map *ex_devid_map;
struct cache_detail *cd;
struct rcu_head ex_rcu;
+ struct export_stats ex_stats;
};
/* an "export key" (expkey) maps a filehandlefragement to an
@@ -100,7 +115,6 @@ struct svc_export * rqst_find_fsidzero_export(struct svc_rqst *);
int exp_rootfh(struct net *, struct auth_domain *,
char *path, struct knfsd_fh *, int maxsize);
__be32 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
-__be32 nfserrno(int errno);
static inline void exp_put(struct svc_export *exp)
{
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index e30e1ddc1ace..615ea8324911 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -1,7 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * Open file cache.
+ * The NFSD open file cache.
*
* (c) 2015 - Jeff Layton <jeff.layton@...marydata.com>
+ *
+ * An nfsd_file object is a per-file collection of open state that binds
+ * together:
+ * - a struct file *
+ * - a user credential
+ * - a network namespace
+ * - a read-ahead context
+ * - monitoring for writeback errors
+ *
+ * nfsd_file objects are reference-counted. Consumers acquire a new
+ * object via the nfsd_file_acquire API. They manage their interest in
+ * the acquired object, and hence the object's reference count, via
+ * nfsd_file_get and nfsd_file_put. There are two varieties of nfsd_file
+ * object:
+ *
+ * * non-garbage-collected: When a consumer wants to precisely control
+ * the lifetime of a file's open state, it acquires a non-garbage-
+ * collected nfsd_file. The final nfsd_file_put releases the open
+ * state immediately.
+ *
+ * * garbage-collected: When a consumer does not control the lifetime
+ * of open state, it acquires a garbage-collected nfsd_file. The
+ * final nfsd_file_put allows the open state to linger for a period
+ * during which it may be re-used.
*/
#include <linux/hash.h>
@@ -12,6 +37,7 @@
#include <linux/fsnotify_backend.h>
#include <linux/fsnotify.h>
#include <linux/seq_file.h>
+#include <linux/rhashtable.h>
#include "vfs.h"
#include "nfsd.h"
@@ -20,63 +46,75 @@
#include "filecache.h"
#include "trace.h"
-#define NFSDDBG_FACILITY NFSDDBG_FH
-
-/* FIXME: dynamically size this for the machine somehow? */
-#define NFSD_FILE_HASH_BITS 12
-#define NFSD_FILE_HASH_SIZE (1 << NFSD_FILE_HASH_BITS)
#define NFSD_LAUNDRETTE_DELAY (2 * HZ)
-#define NFSD_FILE_SHUTDOWN (1)
-#define NFSD_FILE_LRU_THRESHOLD (4096UL)
-#define NFSD_FILE_LRU_LIMIT (NFSD_FILE_LRU_THRESHOLD << 2)
+#define NFSD_FILE_CACHE_UP (0)
/* We only care about NFSD_MAY_READ/WRITE for this cache */
#define NFSD_FILE_MAY_MASK (NFSD_MAY_READ|NFSD_MAY_WRITE)
-struct nfsd_fcache_bucket {
- struct hlist_head nfb_head;
- spinlock_t nfb_lock;
- unsigned int nfb_count;
- unsigned int nfb_maxcount;
-};
-
static DEFINE_PER_CPU(unsigned long, nfsd_file_cache_hits);
+static DEFINE_PER_CPU(unsigned long, nfsd_file_acquisitions);
+static DEFINE_PER_CPU(unsigned long, nfsd_file_releases);
+static DEFINE_PER_CPU(unsigned long, nfsd_file_total_age);
+static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions);
struct nfsd_fcache_disposal {
- struct list_head list;
struct work_struct work;
- struct net *net;
spinlock_t lock;
struct list_head freeme;
- struct rcu_head rcu;
};
static struct workqueue_struct *nfsd_filecache_wq __read_mostly;
static struct kmem_cache *nfsd_file_slab;
static struct kmem_cache *nfsd_file_mark_slab;
-static struct nfsd_fcache_bucket *nfsd_file_hashtbl;
static struct list_lru nfsd_file_lru;
-static long nfsd_file_lru_flags;
+static unsigned long nfsd_file_flags;
static struct fsnotify_group *nfsd_file_fsnotify_group;
-static atomic_long_t nfsd_filecache_count;
static struct delayed_work nfsd_filecache_laundrette;
-static DEFINE_SPINLOCK(laundrette_lock);
-static LIST_HEAD(laundrettes);
+static struct rhltable nfsd_file_rhltable
+ ____cacheline_aligned_in_smp;
+
+static bool
+nfsd_match_cred(const struct cred *c1, const struct cred *c2)
+{
+ int i;
+
+ if (!uid_eq(c1->fsuid, c2->fsuid))
+ return false;
+ if (!gid_eq(c1->fsgid, c2->fsgid))
+ return false;
+ if (c1->group_info == NULL || c2->group_info == NULL)
+ return c1->group_info == c2->group_info;
+ if (c1->group_info->ngroups != c2->group_info->ngroups)
+ return false;
+ for (i = 0; i < c1->group_info->ngroups; i++) {
+ if (!gid_eq(c1->group_info->gid[i], c2->group_info->gid[i]))
+ return false;
+ }
+ return true;
+}
-static void nfsd_file_gc(void);
+static const struct rhashtable_params nfsd_file_rhash_params = {
+ .key_len = sizeof_field(struct nfsd_file, nf_inode),
+ .key_offset = offsetof(struct nfsd_file, nf_inode),
+ .head_offset = offsetof(struct nfsd_file, nf_rlist),
+
+ /*
+ * Start with a single page hash table to reduce resizing churn
+ * on light workloads.
+ */
+ .min_size = 256,
+ .automatic_shrinking = true,
+};
static void
nfsd_file_schedule_laundrette(void)
{
- long count = atomic_long_read(&nfsd_filecache_count);
-
- if (count == 0 || test_bit(NFSD_FILE_SHUTDOWN, &nfsd_file_lru_flags))
- return;
-
- queue_delayed_work(system_wq, &nfsd_filecache_laundrette,
- NFSD_LAUNDRETTE_DELAY);
+ if (test_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags))
+ queue_delayed_work(system_wq, &nfsd_filecache_laundrette,
+ NFSD_LAUNDRETTE_DELAY);
}
static void
@@ -115,22 +153,21 @@ nfsd_file_mark_put(struct nfsd_file_mark *nfm)
}
static struct nfsd_file_mark *
-nfsd_file_mark_find_or_create(struct nfsd_file *nf)
+nfsd_file_mark_find_or_create(struct nfsd_file *nf, struct inode *inode)
{
int err;
struct fsnotify_mark *mark;
struct nfsd_file_mark *nfm = NULL, *new;
- struct inode *inode = nf->nf_inode;
do {
- mutex_lock(&nfsd_file_fsnotify_group->mark_mutex);
+ fsnotify_group_lock(nfsd_file_fsnotify_group);
mark = fsnotify_find_mark(&inode->i_fsnotify_marks,
- nfsd_file_fsnotify_group);
+ nfsd_file_fsnotify_group);
if (mark) {
nfm = nfsd_file_mark_get(container_of(mark,
struct nfsd_file_mark,
nfm_mark));
- mutex_unlock(&nfsd_file_fsnotify_group->mark_mutex);
+ fsnotify_group_unlock(nfsd_file_fsnotify_group);
if (nfm) {
fsnotify_put_mark(mark);
break;
@@ -138,8 +175,9 @@ nfsd_file_mark_find_or_create(struct nfsd_file *nf)
/* Avoid soft lockup race with nfsd_file_mark_put() */
fsnotify_destroy_mark(mark, nfsd_file_fsnotify_group);
fsnotify_put_mark(mark);
- } else
- mutex_unlock(&nfsd_file_fsnotify_group->mark_mutex);
+ } else {
+ fsnotify_group_unlock(nfsd_file_fsnotify_group);
+ }
/* allocate a new nfm */
new = kmem_cache_alloc(nfsd_file_mark_slab, GFP_KERNEL);
@@ -170,244 +208,233 @@ nfsd_file_mark_find_or_create(struct nfsd_file *nf)
}
static struct nfsd_file *
-nfsd_file_alloc(struct inode *inode, unsigned int may, unsigned int hashval,
- struct net *net)
+nfsd_file_alloc(struct net *net, struct inode *inode, unsigned char need,
+ bool want_gc)
{
struct nfsd_file *nf;
nf = kmem_cache_alloc(nfsd_file_slab, GFP_KERNEL);
- if (nf) {
- INIT_HLIST_NODE(&nf->nf_node);
- INIT_LIST_HEAD(&nf->nf_lru);
- nf->nf_file = NULL;
- nf->nf_cred = get_current_cred();
- nf->nf_net = net;
- nf->nf_flags = 0;
- nf->nf_inode = inode;
- nf->nf_hashval = hashval;
- refcount_set(&nf->nf_ref, 1);
- nf->nf_may = may & NFSD_FILE_MAY_MASK;
- if (may & NFSD_MAY_NOT_BREAK_LEASE) {
- if (may & NFSD_MAY_WRITE)
- __set_bit(NFSD_FILE_BREAK_WRITE, &nf->nf_flags);
- if (may & NFSD_MAY_READ)
- __set_bit(NFSD_FILE_BREAK_READ, &nf->nf_flags);
- }
- nf->nf_mark = NULL;
- trace_nfsd_file_alloc(nf);
- }
- return nf;
-}
-
-static bool
-nfsd_file_free(struct nfsd_file *nf)
-{
- bool flush = false;
-
- trace_nfsd_file_put_final(nf);
- if (nf->nf_mark)
- nfsd_file_mark_put(nf->nf_mark);
- if (nf->nf_file) {
- get_file(nf->nf_file);
- filp_close(nf->nf_file, NULL);
- fput(nf->nf_file);
- flush = true;
- }
- call_rcu(&nf->nf_rcu, nfsd_file_slab_free);
- return flush;
-}
-
-static bool
-nfsd_file_check_writeback(struct nfsd_file *nf)
-{
- struct file *file = nf->nf_file;
- struct address_space *mapping;
+ if (unlikely(!nf))
+ return NULL;
- if (!file || !(file->f_mode & FMODE_WRITE))
- return false;
- mapping = file->f_mapping;
- return mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) ||
- mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK);
+ INIT_LIST_HEAD(&nf->nf_lru);
+ nf->nf_birthtime = ktime_get();
+ nf->nf_file = NULL;
+ nf->nf_cred = get_current_cred();
+ nf->nf_net = net;
+ nf->nf_flags = want_gc ?
+ BIT(NFSD_FILE_HASHED) | BIT(NFSD_FILE_PENDING) | BIT(NFSD_FILE_GC) :
+ BIT(NFSD_FILE_HASHED) | BIT(NFSD_FILE_PENDING);
+ nf->nf_inode = inode;
+ refcount_set(&nf->nf_ref, 1);
+ nf->nf_may = need;
+ nf->nf_mark = NULL;
+ return nf;
}
-static int
+/**
+ * nfsd_file_check_write_error - check for writeback errors on a file
+ * @nf: nfsd_file to check for writeback errors
+ *
+ * Check whether a nfsd_file has an unseen error. Reset the write
+ * verifier if so.
+ */
+static void
nfsd_file_check_write_error(struct nfsd_file *nf)
{
struct file *file = nf->nf_file;
- if (!file || !(file->f_mode & FMODE_WRITE))
- return 0;
- return filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err));
+ if ((file->f_mode & FMODE_WRITE) &&
+ filemap_check_wb_err(file->f_mapping, READ_ONCE(file->f_wb_err)))
+ nfsd_reset_write_verifier(net_generic(nf->nf_net, nfsd_net_id));
}
static void
-nfsd_file_do_unhash(struct nfsd_file *nf)
+nfsd_file_hash_remove(struct nfsd_file *nf)
{
- lockdep_assert_held(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
-
trace_nfsd_file_unhash(nf);
-
- if (nfsd_file_check_write_error(nf))
- nfsd_reset_boot_verifier(net_generic(nf->nf_net, nfsd_net_id));
- --nfsd_file_hashtbl[nf->nf_hashval].nfb_count;
- hlist_del_rcu(&nf->nf_node);
- atomic_long_dec(&nfsd_filecache_count);
+ rhltable_remove(&nfsd_file_rhltable, &nf->nf_rlist,
+ nfsd_file_rhash_params);
}
static bool
nfsd_file_unhash(struct nfsd_file *nf)
{
if (test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
- nfsd_file_do_unhash(nf);
- if (!list_empty(&nf->nf_lru))
- list_lru_del(&nfsd_file_lru, &nf->nf_lru);
+ nfsd_file_hash_remove(nf);
return true;
}
return false;
}
-/*
- * Return true if the file was unhashed.
- */
-static bool
-nfsd_file_unhash_and_release_locked(struct nfsd_file *nf, struct list_head *dispose)
+static void
+nfsd_file_free(struct nfsd_file *nf)
{
- lockdep_assert_held(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
-
- trace_nfsd_file_unhash_and_release_locked(nf);
- if (!nfsd_file_unhash(nf))
- return false;
- /* keep final reference for nfsd_file_lru_dispose */
- if (refcount_dec_not_one(&nf->nf_ref))
- return true;
+ s64 age = ktime_to_ms(ktime_sub(ktime_get(), nf->nf_birthtime));
- list_add(&nf->nf_lru, dispose);
- return true;
-}
+ trace_nfsd_file_free(nf);
-static void
-nfsd_file_put_noref(struct nfsd_file *nf)
-{
- trace_nfsd_file_put(nf);
+ this_cpu_inc(nfsd_file_releases);
+ this_cpu_add(nfsd_file_total_age, age);
- if (refcount_dec_and_test(&nf->nf_ref)) {
- WARN_ON(test_bit(NFSD_FILE_HASHED, &nf->nf_flags));
- nfsd_file_free(nf);
+ nfsd_file_unhash(nf);
+ if (nf->nf_mark)
+ nfsd_file_mark_put(nf->nf_mark);
+ if (nf->nf_file) {
+ nfsd_file_check_write_error(nf);
+ filp_close(nf->nf_file, NULL);
}
-}
-void
-nfsd_file_put(struct nfsd_file *nf)
-{
- bool is_hashed;
-
- set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags);
- if (refcount_read(&nf->nf_ref) > 2 || !nf->nf_file) {
- nfsd_file_put_noref(nf);
+ /*
+ * If this item is still linked via nf_lru, that's a bug.
+ * WARN and leak it to preserve system stability.
+ */
+ if (WARN_ON_ONCE(!list_empty(&nf->nf_lru)))
return;
- }
- filemap_flush(nf->nf_file->f_mapping);
- is_hashed = test_bit(NFSD_FILE_HASHED, &nf->nf_flags) != 0;
- nfsd_file_put_noref(nf);
- if (is_hashed)
- nfsd_file_schedule_laundrette();
- if (atomic_long_read(&nfsd_filecache_count) >= NFSD_FILE_LRU_LIMIT)
- nfsd_file_gc();
+ call_rcu(&nf->nf_rcu, nfsd_file_slab_free);
}
-struct nfsd_file *
-nfsd_file_get(struct nfsd_file *nf)
+static bool
+nfsd_file_check_writeback(struct nfsd_file *nf)
{
- if (likely(refcount_inc_not_zero(&nf->nf_ref)))
- return nf;
- return NULL;
+ struct file *file = nf->nf_file;
+ struct address_space *mapping;
+
+ /* File not open for write? */
+ if (!(file->f_mode & FMODE_WRITE))
+ return false;
+
+ /*
+ * Some filesystems (e.g. NFS) flush all dirty data on close.
+ * On others, there is no need to wait for writeback.
+ */
+ if (!(file_inode(file)->i_sb->s_export_op->flags & EXPORT_OP_FLUSH_ON_CLOSE))
+ return false;
+
+ mapping = file->f_mapping;
+ return mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) ||
+ mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK);
}
-static void
-nfsd_file_dispose_list(struct list_head *dispose)
-{
- struct nfsd_file *nf;
- while(!list_empty(dispose)) {
- nf = list_first_entry(dispose, struct nfsd_file, nf_lru);
- list_del(&nf->nf_lru);
- nfsd_file_put_noref(nf);
+static bool nfsd_file_lru_add(struct nfsd_file *nf)
+{
+ set_bit(NFSD_FILE_REFERENCED, &nf->nf_flags);
+ if (list_lru_add(&nfsd_file_lru, &nf->nf_lru)) {
+ trace_nfsd_file_lru_add(nf);
+ return true;
}
+ return false;
}
-static void
-nfsd_file_dispose_list_sync(struct list_head *dispose)
+static bool nfsd_file_lru_remove(struct nfsd_file *nf)
{
- bool flush = false;
- struct nfsd_file *nf;
-
- while(!list_empty(dispose)) {
- nf = list_first_entry(dispose, struct nfsd_file, nf_lru);
- list_del(&nf->nf_lru);
- if (!refcount_dec_and_test(&nf->nf_ref))
- continue;
- if (nfsd_file_free(nf))
- flush = true;
+ if (list_lru_del(&nfsd_file_lru, &nf->nf_lru)) {
+ trace_nfsd_file_lru_del(nf);
+ return true;
}
- if (flush)
- flush_delayed_fput();
+ return false;
}
-static void
-nfsd_file_list_remove_disposal(struct list_head *dst,
- struct nfsd_fcache_disposal *l)
+struct nfsd_file *
+nfsd_file_get(struct nfsd_file *nf)
{
- spin_lock(&l->lock);
- list_splice_init(&l->freeme, dst);
- spin_unlock(&l->lock);
+ if (nf && refcount_inc_not_zero(&nf->nf_ref))
+ return nf;
+ return NULL;
}
-static void
-nfsd_file_list_add_disposal(struct list_head *files, struct net *net)
+/**
+ * nfsd_file_put - put the reference to a nfsd_file
+ * @nf: nfsd_file of which to put the reference
+ *
+ * Put a reference to a nfsd_file. In the non-GC case, we just put the
+ * reference immediately. In the GC case, if the reference would be
+ * the last one, the put it on the LRU instead to be cleaned up later.
+ */
+void
+nfsd_file_put(struct nfsd_file *nf)
{
- struct nfsd_fcache_disposal *l;
+ might_sleep();
+ trace_nfsd_file_put(nf);
- rcu_read_lock();
- list_for_each_entry_rcu(l, &laundrettes, list) {
- if (l->net == net) {
- spin_lock(&l->lock);
- list_splice_tail_init(files, &l->freeme);
- spin_unlock(&l->lock);
- queue_work(nfsd_filecache_wq, &l->work);
- break;
+ if (test_bit(NFSD_FILE_GC, &nf->nf_flags) &&
+ test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
+ /*
+ * If this is the last reference (nf_ref == 1), then try to
+ * transfer it to the LRU.
+ */
+ if (refcount_dec_not_one(&nf->nf_ref))
+ return;
+
+ /* Try to add it to the LRU. If that fails, decrement. */
+ if (nfsd_file_lru_add(nf)) {
+ /* If it's still hashed, we're done */
+ if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
+ nfsd_file_schedule_laundrette();
+ return;
+ }
+
+ /*
+ * We're racing with unhashing, so try to remove it from
+ * the LRU. If removal fails, then someone else already
+ * has our reference.
+ */
+ if (!nfsd_file_lru_remove(nf))
+ return;
}
}
- rcu_read_unlock();
+ if (refcount_dec_and_test(&nf->nf_ref))
+ nfsd_file_free(nf);
}
static void
-nfsd_file_list_add_pernet(struct list_head *dst, struct list_head *src,
- struct net *net)
+nfsd_file_dispose_list(struct list_head *dispose)
{
- struct nfsd_file *nf, *tmp;
+ struct nfsd_file *nf;
- list_for_each_entry_safe(nf, tmp, src, nf_lru) {
- if (nf->nf_net == net)
- list_move_tail(&nf->nf_lru, dst);
+ while (!list_empty(dispose)) {
+ nf = list_first_entry(dispose, struct nfsd_file, nf_lru);
+ list_del_init(&nf->nf_lru);
+ nfsd_file_free(nf);
}
}
+/**
+ * nfsd_file_dispose_list_delayed - move list of dead files to net's freeme list
+ * @dispose: list of nfsd_files to be disposed
+ *
+ * Transfers each file to the "freeme" list for its nfsd_net, to eventually
+ * be disposed of by the per-net garbage collector.
+ */
static void
nfsd_file_dispose_list_delayed(struct list_head *dispose)
{
- LIST_HEAD(list);
- struct nfsd_file *nf;
-
while(!list_empty(dispose)) {
- nf = list_first_entry(dispose, struct nfsd_file, nf_lru);
- nfsd_file_list_add_pernet(&list, dispose, nf->nf_net);
- nfsd_file_list_add_disposal(&list, nf->nf_net);
+ struct nfsd_file *nf = list_first_entry(dispose,
+ struct nfsd_file, nf_lru);
+ struct nfsd_net *nn = net_generic(nf->nf_net, nfsd_net_id);
+ struct nfsd_fcache_disposal *l = nn->fcache_disposal;
+
+ spin_lock(&l->lock);
+ list_move_tail(&nf->nf_lru, &l->freeme);
+ spin_unlock(&l->lock);
+ queue_work(nfsd_filecache_wq, &l->work);
}
}
-/*
- * Note this can deadlock with nfsd_file_cache_purge.
+/**
+ * nfsd_file_lru_cb - Examine an entry on the LRU list
+ * @item: LRU entry to examine
+ * @lru: controlling LRU
+ * @lock: LRU list lock (unused)
+ * @arg: dispose list
+ *
+ * Return values:
+ * %LRU_REMOVED: @item was removed from the LRU
+ * %LRU_ROTATE: @item is to be moved to the LRU tail
+ * %LRU_SKIP: @item cannot be evicted
*/
static enum lru_status
nfsd_file_lru_cb(struct list_head *item, struct list_lru_one *lru,
@@ -418,72 +445,60 @@ nfsd_file_lru_cb(struct list_head *item, struct list_lru_one *lru,
struct list_head *head = arg;
struct nfsd_file *nf = list_entry(item, struct nfsd_file, nf_lru);
- /*
- * Do a lockless refcount check. The hashtable holds one reference, so
- * we look to see if anything else has a reference, or if any have
- * been put since the shrinker last ran. Those don't get unhashed and
- * released.
- *
- * Note that in the put path, we set the flag and then decrement the
- * counter. Here we check the counter and then test and clear the flag.
- * That order is deliberate to ensure that we can do this locklessly.
- */
- if (refcount_read(&nf->nf_ref) > 1)
- goto out_skip;
+ /* We should only be dealing with GC entries here */
+ WARN_ON_ONCE(!test_bit(NFSD_FILE_GC, &nf->nf_flags));
/*
* Don't throw out files that are still undergoing I/O or
* that have uncleared errors pending.
*/
- if (nfsd_file_check_writeback(nf))
- goto out_skip;
+ if (nfsd_file_check_writeback(nf)) {
+ trace_nfsd_file_gc_writeback(nf);
+ return LRU_SKIP;
+ }
- if (test_and_clear_bit(NFSD_FILE_REFERENCED, &nf->nf_flags))
- goto out_skip;
+ /* If it was recently added to the list, skip it */
+ if (test_and_clear_bit(NFSD_FILE_REFERENCED, &nf->nf_flags)) {
+ trace_nfsd_file_gc_referenced(nf);
+ return LRU_ROTATE;
+ }
- if (!test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags))
- goto out_skip;
+ /*
+ * Put the reference held on behalf of the LRU. If it wasn't the last
+ * one, then just remove it from the LRU and ignore it.
+ */
+ if (!refcount_dec_and_test(&nf->nf_ref)) {
+ trace_nfsd_file_gc_in_use(nf);
+ list_lru_isolate(lru, &nf->nf_lru);
+ return LRU_REMOVED;
+ }
+ /* Refcount went to zero. Unhash it and queue it to the dispose list */
+ nfsd_file_unhash(nf);
list_lru_isolate_move(lru, &nf->nf_lru, head);
+ this_cpu_inc(nfsd_file_evictions);
+ trace_nfsd_file_gc_disposed(nf);
return LRU_REMOVED;
-out_skip:
- return LRU_SKIP;
-}
-
-static unsigned long
-nfsd_file_lru_walk_list(struct shrink_control *sc)
-{
- LIST_HEAD(head);
- struct nfsd_file *nf;
- unsigned long ret;
-
- if (sc)
- ret = list_lru_shrink_walk(&nfsd_file_lru, sc,
- nfsd_file_lru_cb, &head);
- else
- ret = list_lru_walk(&nfsd_file_lru,
- nfsd_file_lru_cb,
- &head, LONG_MAX);
- list_for_each_entry(nf, &head, nf_lru) {
- spin_lock(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
- nfsd_file_do_unhash(nf);
- spin_unlock(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
- }
- nfsd_file_dispose_list_delayed(&head);
- return ret;
}
static void
nfsd_file_gc(void)
{
- nfsd_file_lru_walk_list(NULL);
+ LIST_HEAD(dispose);
+ unsigned long ret;
+
+ ret = list_lru_walk(&nfsd_file_lru, nfsd_file_lru_cb,
+ &dispose, list_lru_count(&nfsd_file_lru));
+ trace_nfsd_file_gc_removed(ret, list_lru_count(&nfsd_file_lru));
+ nfsd_file_dispose_list_delayed(&dispose);
}
static void
nfsd_file_gc_worker(struct work_struct *work)
{
nfsd_file_gc();
- nfsd_file_schedule_laundrette();
+ if (list_lru_count(&nfsd_file_lru))
+ nfsd_file_schedule_laundrette();
}
static unsigned long
@@ -495,7 +510,14 @@ nfsd_file_lru_count(struct shrinker *s, struct shrink_control *sc)
static unsigned long
nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc)
{
- return nfsd_file_lru_walk_list(sc);
+ LIST_HEAD(dispose);
+ unsigned long ret;
+
+ ret = list_lru_shrink_walk(&nfsd_file_lru, sc,
+ nfsd_file_lru_cb, &dispose);
+ trace_nfsd_file_shrinker_removed(ret, list_lru_count(&nfsd_file_lru));
+ nfsd_file_dispose_list_delayed(&dispose);
+ return ret;
}
static struct shrinker nfsd_file_shrinker = {
@@ -504,70 +526,123 @@ static struct shrinker nfsd_file_shrinker = {
.seeks = 1,
};
+/**
+ * nfsd_file_cond_queue - conditionally unhash and queue a nfsd_file
+ * @nf: nfsd_file to attempt to queue
+ * @dispose: private list to queue successfully-put objects
+ *
+ * Unhash an nfsd_file, try to get a reference to it, and then put that
+ * reference. If it's the last reference, queue it to the dispose list.
+ */
+static void
+nfsd_file_cond_queue(struct nfsd_file *nf, struct list_head *dispose)
+ __must_hold(RCU)
+{
+ int decrement = 1;
+
+ /* If we raced with someone else unhashing, ignore it */
+ if (!nfsd_file_unhash(nf))
+ return;
+
+ /* If we can't get a reference, ignore it */
+ if (!nfsd_file_get(nf))
+ return;
+
+ /* Extra decrement if we remove from the LRU */
+ if (nfsd_file_lru_remove(nf))
+ ++decrement;
+
+ /* If refcount goes to 0, then put on the dispose list */
+ if (refcount_sub_and_test(decrement, &nf->nf_ref)) {
+ list_add(&nf->nf_lru, dispose);
+ trace_nfsd_file_closing(nf);
+ }
+}
+
+/**
+ * nfsd_file_queue_for_close: try to close out any open nfsd_files for an inode
+ * @inode: inode on which to close out nfsd_files
+ * @dispose: list on which to gather nfsd_files to close out
+ *
+ * An nfsd_file represents a struct file being held open on behalf of nfsd.
+ * An open file however can block other activity (such as leases), or cause
+ * undesirable behavior (e.g. spurious silly-renames when reexporting NFS).
+ *
+ * This function is intended to find open nfsd_files when this sort of
+ * conflicting access occurs and then attempt to close those files out.
+ *
+ * Populates the dispose list with entries that have already had their
+ * refcounts go to zero. The actual free of an nfsd_file can be expensive,
+ * so we leave it up to the caller whether it wants to wait or not.
+ */
static void
-__nfsd_file_close_inode(struct inode *inode, unsigned int hashval,
- struct list_head *dispose)
+nfsd_file_queue_for_close(struct inode *inode, struct list_head *dispose)
{
- struct nfsd_file *nf;
- struct hlist_node *tmp;
+ struct rhlist_head *tmp, *list;
+ struct nfsd_file *nf;
- spin_lock(&nfsd_file_hashtbl[hashval].nfb_lock);
- hlist_for_each_entry_safe(nf, tmp, &nfsd_file_hashtbl[hashval].nfb_head, nf_node) {
- if (inode == nf->nf_inode)
- nfsd_file_unhash_and_release_locked(nf, dispose);
+ rcu_read_lock();
+ list = rhltable_lookup(&nfsd_file_rhltable, &inode,
+ nfsd_file_rhash_params);
+ rhl_for_each_entry_rcu(nf, tmp, list, nf_rlist) {
+ if (!test_bit(NFSD_FILE_GC, &nf->nf_flags))
+ continue;
+ nfsd_file_cond_queue(nf, dispose);
}
- spin_unlock(&nfsd_file_hashtbl[hashval].nfb_lock);
+ rcu_read_unlock();
}
/**
- * nfsd_file_close_inode_sync - attempt to forcibly close a nfsd_file
+ * nfsd_file_close_inode - attempt a delayed close of a nfsd_file
* @inode: inode of the file to attempt to remove
*
- * Walk the whole hash bucket, looking for any files that correspond to "inode".
- * If any do, then unhash them and put the hashtable reference to them and
- * destroy any that had their last reference put. Also ensure that any of the
- * fputs also have their final __fput done as well.
+ * Close out any open nfsd_files that can be reaped for @inode. The
+ * actual freeing is deferred to the dispose_list_delayed infrastructure.
+ *
+ * This is used by the fsnotify callbacks and setlease notifier.
*/
-void
-nfsd_file_close_inode_sync(struct inode *inode)
+static void
+nfsd_file_close_inode(struct inode *inode)
{
- unsigned int hashval = (unsigned int)hash_long(inode->i_ino,
- NFSD_FILE_HASH_BITS);
LIST_HEAD(dispose);
- __nfsd_file_close_inode(inode, hashval, &dispose);
- trace_nfsd_file_close_inode_sync(inode, hashval, !list_empty(&dispose));
- nfsd_file_dispose_list_sync(&dispose);
+ nfsd_file_queue_for_close(inode, &dispose);
+ nfsd_file_dispose_list_delayed(&dispose);
}
/**
* nfsd_file_close_inode_sync - attempt to forcibly close a nfsd_file
* @inode: inode of the file to attempt to remove
*
- * Walk the whole hash bucket, looking for any files that correspond to "inode".
- * If any do, then unhash them and put the hashtable reference to them and
- * destroy any that had their last reference put.
+ * Close out any open nfsd_files that can be reaped for @inode. The
+ * nfsd_files are closed out synchronously.
+ *
+ * This is called from nfsd_rename and nfsd_unlink to avoid silly-renames
+ * when reexporting NFS.
*/
-static void
-nfsd_file_close_inode(struct inode *inode)
+void
+nfsd_file_close_inode_sync(struct inode *inode)
{
- unsigned int hashval = (unsigned int)hash_long(inode->i_ino,
- NFSD_FILE_HASH_BITS);
+ struct nfsd_file *nf;
LIST_HEAD(dispose);
- __nfsd_file_close_inode(inode, hashval, &dispose);
- trace_nfsd_file_close_inode(inode, hashval, !list_empty(&dispose));
- nfsd_file_dispose_list_delayed(&dispose);
+ trace_nfsd_file_close(inode);
+
+ nfsd_file_queue_for_close(inode, &dispose);
+ while (!list_empty(&dispose)) {
+ nf = list_first_entry(&dispose, struct nfsd_file, nf_lru);
+ list_del_init(&nf->nf_lru);
+ nfsd_file_free(nf);
+ }
+ flush_delayed_fput();
}
/**
* nfsd_file_delayed_close - close unused nfsd_files
* @work: dummy
*
- * Walk the LRU list and close any entries that have not been used since
- * the last scan.
- *
- * Note this can deadlock with nfsd_file_cache_purge.
+ * Scrape the freeme list for this nfsd_net, and then dispose of them
+ * all.
*/
static void
nfsd_file_delayed_close(struct work_struct *work)
@@ -576,7 +651,10 @@ nfsd_file_delayed_close(struct work_struct *work)
struct nfsd_fcache_disposal *l = container_of(work,
struct nfsd_fcache_disposal, work);
- nfsd_file_list_remove_disposal(&head, l);
+ spin_lock(&l->lock);
+ list_splice_init(&l->freeme, &head);
+ spin_unlock(&l->lock);
+
nfsd_file_dispose_list(&head);
}
@@ -588,7 +666,7 @@ nfsd_file_lease_notifier_call(struct notifier_block *nb, unsigned long arg,
/* Only close files for F_SETLEASE leases */
if (fl->fl_flags & FL_LEASE)
- nfsd_file_close_inode_sync(file_inode(fl->fl_file));
+ nfsd_file_close_inode(file_inode(fl->fl_file));
return 0;
}
@@ -601,6 +679,9 @@ nfsd_file_fsnotify_handle_event(struct fsnotify_mark *mark, u32 mask,
struct inode *inode, struct inode *dir,
const struct qstr *name, u32 cookie)
{
+ if (WARN_ON_ONCE(!inode))
+ return 0;
+
trace_nfsd_file_fsnotify_handle_event(inode, mask);
/* Should be no marks on non-regular files */
@@ -628,25 +709,21 @@ static const struct fsnotify_ops nfsd_file_fsnotify_ops = {
int
nfsd_file_cache_init(void)
{
- int ret = -ENOMEM;
- unsigned int i;
-
- clear_bit(NFSD_FILE_SHUTDOWN, &nfsd_file_lru_flags);
+ int ret;
- if (nfsd_file_hashtbl)
+ lockdep_assert_held(&nfsd_mutex);
+ if (test_and_set_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags) == 1)
return 0;
+ ret = rhltable_init(&nfsd_file_rhltable, &nfsd_file_rhash_params);
+ if (ret)
+ return ret;
+
+ ret = -ENOMEM;
nfsd_filecache_wq = alloc_workqueue("nfsd_filecache", 0, 0);
if (!nfsd_filecache_wq)
goto out;
- nfsd_file_hashtbl = kvcalloc(NFSD_FILE_HASH_SIZE,
- sizeof(*nfsd_file_hashtbl), GFP_KERNEL);
- if (!nfsd_file_hashtbl) {
- pr_err("nfsd: unable to allocate nfsd_file_hashtbl\n");
- goto out_err;
- }
-
nfsd_file_slab = kmem_cache_create("nfsd_file",
sizeof(struct nfsd_file), 0, 0, NULL);
if (!nfsd_file_slab) {
@@ -680,19 +757,16 @@ nfsd_file_cache_init(void)
goto out_shrinker;
}
- nfsd_file_fsnotify_group = fsnotify_alloc_group(&nfsd_file_fsnotify_ops);
+ nfsd_file_fsnotify_group = fsnotify_alloc_group(&nfsd_file_fsnotify_ops,
+ FSNOTIFY_GROUP_NOFS);
if (IS_ERR(nfsd_file_fsnotify_group)) {
pr_err("nfsd: unable to create fsnotify group: %ld\n",
PTR_ERR(nfsd_file_fsnotify_group));
+ ret = PTR_ERR(nfsd_file_fsnotify_group);
nfsd_file_fsnotify_group = NULL;
goto out_notifier;
}
- for (i = 0; i < NFSD_FILE_HASH_SIZE; i++) {
- INIT_HLIST_HEAD(&nfsd_file_hashtbl[i].nfb_head);
- spin_lock_init(&nfsd_file_hashtbl[i].nfb_lock);
- }
-
INIT_DELAYED_WORK(&nfsd_filecache_laundrette, nfsd_file_gc_worker);
out:
return ret;
@@ -707,50 +781,47 @@ nfsd_file_cache_init(void)
nfsd_file_slab = NULL;
kmem_cache_destroy(nfsd_file_mark_slab);
nfsd_file_mark_slab = NULL;
- kvfree(nfsd_file_hashtbl);
- nfsd_file_hashtbl = NULL;
destroy_workqueue(nfsd_filecache_wq);
nfsd_filecache_wq = NULL;
+ rhltable_destroy(&nfsd_file_rhltable);
goto out;
}
-/*
- * Note this can deadlock with nfsd_file_lru_cb.
+/**
+ * __nfsd_file_cache_purge: clean out the cache for shutdown
+ * @net: net-namespace to shut down the cache (may be NULL)
+ *
+ * Walk the nfsd_file cache and close out any that match @net. If @net is NULL,
+ * then close out everything. Called when an nfsd instance is being shut down,
+ * and when the exports table is flushed.
*/
-void
-nfsd_file_cache_purge(struct net *net)
+static void
+__nfsd_file_cache_purge(struct net *net)
{
- unsigned int i;
- struct nfsd_file *nf;
- struct hlist_node *next;
+ struct rhashtable_iter iter;
+ struct nfsd_file *nf;
LIST_HEAD(dispose);
- bool del;
- if (!nfsd_file_hashtbl)
- return;
+ rhltable_walk_enter(&nfsd_file_rhltable, &iter);
+ do {
+ rhashtable_walk_start(&iter);
- for (i = 0; i < NFSD_FILE_HASH_SIZE; i++) {
- struct nfsd_fcache_bucket *nfb = &nfsd_file_hashtbl[i];
+ nf = rhashtable_walk_next(&iter);
+ while (!IS_ERR_OR_NULL(nf)) {
+ if (!net || nf->nf_net == net)
+ nfsd_file_cond_queue(nf, &dispose);
+ nf = rhashtable_walk_next(&iter);
+ }
- spin_lock(&nfb->nfb_lock);
- hlist_for_each_entry_safe(nf, next, &nfb->nfb_head, nf_node) {
- if (net && nf->nf_net != net)
- continue;
- del = nfsd_file_unhash_and_release_locked(nf, &dispose);
+ rhashtable_walk_stop(&iter);
+ } while (nf == ERR_PTR(-EAGAIN));
+ rhashtable_walk_exit(&iter);
- /*
- * Deadlock detected! Something marked this entry as
- * unhased, but hasn't removed it from the hash list.
- */
- WARN_ON_ONCE(!del);
- }
- spin_unlock(&nfb->nfb_lock);
- nfsd_file_dispose_list(&dispose);
- }
+ nfsd_file_dispose_list(&dispose);
}
static struct nfsd_fcache_disposal *
-nfsd_alloc_fcache_disposal(struct net *net)
+nfsd_alloc_fcache_disposal(void)
{
struct nfsd_fcache_disposal *l;
@@ -758,7 +829,6 @@ nfsd_alloc_fcache_disposal(struct net *net)
if (!l)
return NULL;
INIT_WORK(&l->work, nfsd_file_delayed_close);
- l->net = net;
spin_lock_init(&l->lock);
INIT_LIST_HEAD(&l->freeme);
return l;
@@ -767,61 +837,40 @@ nfsd_alloc_fcache_disposal(struct net *net)
static void
nfsd_free_fcache_disposal(struct nfsd_fcache_disposal *l)
{
- rcu_assign_pointer(l->net, NULL);
cancel_work_sync(&l->work);
nfsd_file_dispose_list(&l->freeme);
- kfree_rcu(l, rcu);
+ kfree(l);
}
static void
-nfsd_add_fcache_disposal(struct nfsd_fcache_disposal *l)
-{
- spin_lock(&laundrette_lock);
- list_add_tail_rcu(&l->list, &laundrettes);
- spin_unlock(&laundrette_lock);
-}
-
-static void
-nfsd_del_fcache_disposal(struct nfsd_fcache_disposal *l)
-{
- spin_lock(&laundrette_lock);
- list_del_rcu(&l->list);
- spin_unlock(&laundrette_lock);
-}
-
-static int
-nfsd_alloc_fcache_disposal_net(struct net *net)
+nfsd_free_fcache_disposal_net(struct net *net)
{
- struct nfsd_fcache_disposal *l;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct nfsd_fcache_disposal *l = nn->fcache_disposal;
- l = nfsd_alloc_fcache_disposal(net);
- if (!l)
- return -ENOMEM;
- nfsd_add_fcache_disposal(l);
- return 0;
+ nfsd_free_fcache_disposal(l);
}
-static void
-nfsd_free_fcache_disposal_net(struct net *net)
+int
+nfsd_file_cache_start_net(struct net *net)
{
- struct nfsd_fcache_disposal *l;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- rcu_read_lock();
- list_for_each_entry_rcu(l, &laundrettes, list) {
- if (l->net != net)
- continue;
- nfsd_del_fcache_disposal(l);
- rcu_read_unlock();
- nfsd_free_fcache_disposal(l);
- return;
- }
- rcu_read_unlock();
+ nn->fcache_disposal = nfsd_alloc_fcache_disposal();
+ return nn->fcache_disposal ? 0 : -ENOMEM;
}
-int
-nfsd_file_cache_start_net(struct net *net)
+/**
+ * nfsd_file_cache_purge - Remove all cache items associated with @net
+ * @net: target net namespace
+ *
+ */
+void
+nfsd_file_cache_purge(struct net *net)
{
- return nfsd_alloc_fcache_disposal_net(net);
+ lockdep_assert_held(&nfsd_mutex);
+ if (test_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags) == 1)
+ __nfsd_file_cache_purge(net);
}
void
@@ -834,7 +883,11 @@ nfsd_file_cache_shutdown_net(struct net *net)
void
nfsd_file_cache_shutdown(void)
{
- set_bit(NFSD_FILE_SHUTDOWN, &nfsd_file_lru_flags);
+ int i;
+
+ lockdep_assert_held(&nfsd_mutex);
+ if (test_and_clear_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags) == 0)
+ return;
lease_unregister_notifier(&nfsd_file_lease_notifier);
unregister_shrinker(&nfsd_file_shrinker);
@@ -843,7 +896,7 @@ nfsd_file_cache_shutdown(void)
* calling nfsd_file_cache_purge
*/
cancel_delayed_work_sync(&nfsd_filecache_laundrette);
- nfsd_file_cache_purge(NULL);
+ __nfsd_file_cache_purge(NULL);
list_lru_destroy(&nfsd_file_lru);
rcu_barrier();
fsnotify_put_group(nfsd_file_fsnotify_group);
@@ -853,240 +906,332 @@ nfsd_file_cache_shutdown(void)
fsnotify_wait_marks_destroyed();
kmem_cache_destroy(nfsd_file_mark_slab);
nfsd_file_mark_slab = NULL;
- kvfree(nfsd_file_hashtbl);
- nfsd_file_hashtbl = NULL;
destroy_workqueue(nfsd_filecache_wq);
nfsd_filecache_wq = NULL;
-}
-
-static bool
-nfsd_match_cred(const struct cred *c1, const struct cred *c2)
-{
- int i;
-
- if (!uid_eq(c1->fsuid, c2->fsuid))
- return false;
- if (!gid_eq(c1->fsgid, c2->fsgid))
- return false;
- if (c1->group_info == NULL || c2->group_info == NULL)
- return c1->group_info == c2->group_info;
- if (c1->group_info->ngroups != c2->group_info->ngroups)
- return false;
- for (i = 0; i < c1->group_info->ngroups; i++) {
- if (!gid_eq(c1->group_info->gid[i], c2->group_info->gid[i]))
- return false;
+ rhltable_destroy(&nfsd_file_rhltable);
+
+ for_each_possible_cpu(i) {
+ per_cpu(nfsd_file_cache_hits, i) = 0;
+ per_cpu(nfsd_file_acquisitions, i) = 0;
+ per_cpu(nfsd_file_releases, i) = 0;
+ per_cpu(nfsd_file_total_age, i) = 0;
+ per_cpu(nfsd_file_evictions, i) = 0;
}
- return true;
}
static struct nfsd_file *
-nfsd_file_find_locked(struct inode *inode, unsigned int may_flags,
- unsigned int hashval, struct net *net)
+nfsd_file_lookup_locked(const struct net *net, const struct cred *cred,
+ struct inode *inode, unsigned char need,
+ bool want_gc)
{
+ struct rhlist_head *tmp, *list;
struct nfsd_file *nf;
- unsigned char need = may_flags & NFSD_FILE_MAY_MASK;
- hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head,
- nf_node, lockdep_is_held(&nfsd_file_hashtbl[hashval].nfb_lock)) {
+ list = rhltable_lookup(&nfsd_file_rhltable, &inode,
+ nfsd_file_rhash_params);
+ rhl_for_each_entry_rcu(nf, tmp, list, nf_rlist) {
if (nf->nf_may != need)
continue;
- if (nf->nf_inode != inode)
- continue;
if (nf->nf_net != net)
continue;
- if (!nfsd_match_cred(nf->nf_cred, current_cred()))
+ if (!nfsd_match_cred(nf->nf_cred, cred))
continue;
- if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags))
+ if (test_bit(NFSD_FILE_GC, &nf->nf_flags) != want_gc)
continue;
- if (nfsd_file_get(nf) != NULL)
- return nf;
+ if (test_bit(NFSD_FILE_HASHED, &nf->nf_flags) == 0)
+ continue;
+
+ if (!nfsd_file_get(nf))
+ continue;
+ return nf;
}
return NULL;
}
/**
- * nfsd_file_is_cached - are there any cached open files for this fh?
- * @inode: inode of the file to check
+ * nfsd_file_is_cached - are there any cached open files for this inode?
+ * @inode: inode to check
+ *
+ * The lookup matches inodes in all net namespaces and is atomic wrt
+ * nfsd_file_acquire().
*
- * Scan the hashtable for open files that match this fh. Returns true if there
- * are any, and false if not.
+ * Return values:
+ * %true: filecache contains at least one file matching this inode
+ * %false: filecache contains no files matching this inode
*/
bool
nfsd_file_is_cached(struct inode *inode)
{
- bool ret = false;
- struct nfsd_file *nf;
- unsigned int hashval;
-
- hashval = (unsigned int)hash_long(inode->i_ino, NFSD_FILE_HASH_BITS);
+ struct rhlist_head *tmp, *list;
+ struct nfsd_file *nf;
+ bool ret = false;
rcu_read_lock();
- hlist_for_each_entry_rcu(nf, &nfsd_file_hashtbl[hashval].nfb_head,
- nf_node) {
- if (inode == nf->nf_inode) {
+ list = rhltable_lookup(&nfsd_file_rhltable, &inode,
+ nfsd_file_rhash_params);
+ rhl_for_each_entry_rcu(nf, tmp, list, nf_rlist)
+ if (test_bit(NFSD_FILE_GC, &nf->nf_flags)) {
ret = true;
break;
}
- }
rcu_read_unlock();
- trace_nfsd_file_is_cached(inode, hashval, (int)ret);
+
+ trace_nfsd_file_is_cached(inode, (int)ret);
return ret;
}
-__be32
-nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
- unsigned int may_flags, struct nfsd_file **pnf)
+static __be32
+nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct file *file,
+ struct nfsd_file **pnf, bool want_gc)
{
- __be32 status;
+ unsigned char need = may_flags & NFSD_FILE_MAY_MASK;
struct net *net = SVC_NET(rqstp);
- struct nfsd_file *nf, *new;
+ struct nfsd_file *new, *nf;
+ const struct cred *cred;
+ bool open_retry = true;
struct inode *inode;
- unsigned int hashval;
- bool retry = true;
+ __be32 status;
+ int ret;
- /* FIXME: skip this if fh_dentry is already set? */
status = fh_verify(rqstp, fhp, S_IFREG,
may_flags|NFSD_MAY_OWNER_OVERRIDE);
if (status != nfs_ok)
return status;
-
inode = d_inode(fhp->fh_dentry);
- hashval = (unsigned int)hash_long(inode->i_ino, NFSD_FILE_HASH_BITS);
+ cred = get_current_cred();
+
retry:
rcu_read_lock();
- nf = nfsd_file_find_locked(inode, may_flags, hashval, net);
+ nf = nfsd_file_lookup_locked(net, cred, inode, need, want_gc);
rcu_read_unlock();
- if (nf)
+
+ if (nf) {
+ /*
+ * If the nf is on the LRU then it holds an extra reference
+ * that must be put if it's removed. It had better not be
+ * the last one however, since we should hold another.
+ */
+ if (nfsd_file_lru_remove(nf))
+ WARN_ON_ONCE(refcount_dec_and_test(&nf->nf_ref));
goto wait_for_construction;
+ }
- new = nfsd_file_alloc(inode, may_flags, hashval, net);
+ new = nfsd_file_alloc(net, inode, need, want_gc);
if (!new) {
- trace_nfsd_file_acquire(rqstp, hashval, inode, may_flags,
- NULL, nfserr_jukebox);
- return nfserr_jukebox;
+ status = nfserr_jukebox;
+ goto out;
}
- spin_lock(&nfsd_file_hashtbl[hashval].nfb_lock);
- nf = nfsd_file_find_locked(inode, may_flags, hashval, net);
- if (nf == NULL)
+ rcu_read_lock();
+ spin_lock(&inode->i_lock);
+ nf = nfsd_file_lookup_locked(net, cred, inode, need, want_gc);
+ if (unlikely(nf)) {
+ spin_unlock(&inode->i_lock);
+ rcu_read_unlock();
+ nfsd_file_slab_free(&new->nf_rcu);
+ goto wait_for_construction;
+ }
+ nf = new;
+ ret = rhltable_insert(&nfsd_file_rhltable, &nf->nf_rlist,
+ nfsd_file_rhash_params);
+ spin_unlock(&inode->i_lock);
+ rcu_read_unlock();
+ if (likely(ret == 0))
goto open_file;
- spin_unlock(&nfsd_file_hashtbl[hashval].nfb_lock);
- nfsd_file_slab_free(&new->nf_rcu);
+
+ if (ret == -EEXIST)
+ goto retry;
+ trace_nfsd_file_insert_err(rqstp, inode, may_flags, ret);
+ status = nfserr_jukebox;
+ goto construction_err;
wait_for_construction:
wait_on_bit(&nf->nf_flags, NFSD_FILE_PENDING, TASK_UNINTERRUPTIBLE);
/* Did construction of this file fail? */
if (!test_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
- if (!retry) {
+ trace_nfsd_file_cons_err(rqstp, inode, may_flags, nf);
+ if (!open_retry) {
status = nfserr_jukebox;
- goto out;
+ goto construction_err;
}
- retry = false;
- nfsd_file_put_noref(nf);
+ open_retry = false;
goto retry;
}
-
this_cpu_inc(nfsd_file_cache_hits);
- if (!(may_flags & NFSD_MAY_NOT_BREAK_LEASE)) {
- bool write = (may_flags & NFSD_MAY_WRITE);
-
- if (test_bit(NFSD_FILE_BREAK_READ, &nf->nf_flags) ||
- (test_bit(NFSD_FILE_BREAK_WRITE, &nf->nf_flags) && write)) {
- status = nfserrno(nfsd_open_break_lease(
- file_inode(nf->nf_file), may_flags));
- if (status == nfs_ok) {
- clear_bit(NFSD_FILE_BREAK_READ, &nf->nf_flags);
- if (write)
- clear_bit(NFSD_FILE_BREAK_WRITE,
- &nf->nf_flags);
- }
- }
+ status = nfserrno(nfsd_open_break_lease(file_inode(nf->nf_file), may_flags));
+ if (status != nfs_ok) {
+ nfsd_file_put(nf);
+ nf = NULL;
}
+
out:
if (status == nfs_ok) {
+ this_cpu_inc(nfsd_file_acquisitions);
+ nfsd_file_check_write_error(nf);
*pnf = nf;
- } else {
- nfsd_file_put(nf);
- nf = NULL;
}
-
- trace_nfsd_file_acquire(rqstp, hashval, inode, may_flags, nf, status);
+ put_cred(cred);
+ trace_nfsd_file_acquire(rqstp, inode, may_flags, nf, status);
return status;
+
open_file:
- nf = new;
- /* Take reference for the hashtable */
- refcount_inc(&nf->nf_ref);
- __set_bit(NFSD_FILE_HASHED, &nf->nf_flags);
- __set_bit(NFSD_FILE_PENDING, &nf->nf_flags);
- list_lru_add(&nfsd_file_lru, &nf->nf_lru);
- hlist_add_head_rcu(&nf->nf_node, &nfsd_file_hashtbl[hashval].nfb_head);
- ++nfsd_file_hashtbl[hashval].nfb_count;
- nfsd_file_hashtbl[hashval].nfb_maxcount = max(nfsd_file_hashtbl[hashval].nfb_maxcount,
- nfsd_file_hashtbl[hashval].nfb_count);
- spin_unlock(&nfsd_file_hashtbl[hashval].nfb_lock);
- if (atomic_long_inc_return(&nfsd_filecache_count) >= NFSD_FILE_LRU_THRESHOLD)
- nfsd_file_gc();
-
- nf->nf_mark = nfsd_file_mark_find_or_create(nf);
- if (nf->nf_mark)
- status = nfsd_open_verified(rqstp, fhp, S_IFREG,
- may_flags, &nf->nf_file);
- else
+ trace_nfsd_file_alloc(nf);
+ nf->nf_mark = nfsd_file_mark_find_or_create(nf, inode);
+ if (nf->nf_mark) {
+ if (file) {
+ get_file(file);
+ nf->nf_file = file;
+ status = nfs_ok;
+ trace_nfsd_file_opened(nf, status);
+ } else {
+ status = nfsd_open_verified(rqstp, fhp, may_flags,
+ &nf->nf_file);
+ trace_nfsd_file_open(nf, status);
+ }
+ } else
status = nfserr_jukebox;
/*
* If construction failed, or we raced with a call to unlink()
* then unhash.
*/
- if (status != nfs_ok || inode->i_nlink == 0) {
- bool do_free;
- spin_lock(&nfsd_file_hashtbl[hashval].nfb_lock);
- do_free = nfsd_file_unhash(nf);
- spin_unlock(&nfsd_file_hashtbl[hashval].nfb_lock);
- if (do_free)
- nfsd_file_put_noref(nf);
- }
- clear_bit_unlock(NFSD_FILE_PENDING, &nf->nf_flags);
- smp_mb__after_atomic();
- wake_up_bit(&nf->nf_flags, NFSD_FILE_PENDING);
+ if (status != nfs_ok || inode->i_nlink == 0)
+ nfsd_file_unhash(nf);
+ clear_and_wake_up_bit(NFSD_FILE_PENDING, &nf->nf_flags);
+ if (status == nfs_ok)
+ goto out;
+
+construction_err:
+ if (refcount_dec_and_test(&nf->nf_ref))
+ nfsd_file_free(nf);
+ nf = NULL;
goto out;
}
+/**
+ * nfsd_file_acquire_gc - Get a struct nfsd_file with an open file
+ * @rqstp: the RPC transaction being executed
+ * @fhp: the NFS filehandle of the file to be opened
+ * @may_flags: NFSD_MAY_ settings for the file
+ * @pnf: OUT: new or found "struct nfsd_file" object
+ *
+ * The nfsd_file object returned by this API is reference-counted
+ * and garbage-collected. The object is retained for a few
+ * seconds after the final nfsd_file_put() in case the caller
+ * wants to re-use it.
+ *
+ * Return values:
+ * %nfs_ok - @pnf points to an nfsd_file with its reference
+ * count boosted.
+ *
+ * On error, an nfsstat value in network byte order is returned.
+ */
+__be32
+nfsd_file_acquire_gc(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct nfsd_file **pnf)
+{
+ return nfsd_file_do_acquire(rqstp, fhp, may_flags, NULL, pnf, true);
+}
+
+/**
+ * nfsd_file_acquire - Get a struct nfsd_file with an open file
+ * @rqstp: the RPC transaction being executed
+ * @fhp: the NFS filehandle of the file to be opened
+ * @may_flags: NFSD_MAY_ settings for the file
+ * @pnf: OUT: new or found "struct nfsd_file" object
+ *
+ * The nfsd_file_object returned by this API is reference-counted
+ * but not garbage-collected. The object is unhashed after the
+ * final nfsd_file_put().
+ *
+ * Return values:
+ * %nfs_ok - @pnf points to an nfsd_file with its reference
+ * count boosted.
+ *
+ * On error, an nfsstat value in network byte order is returned.
+ */
+__be32
+nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct nfsd_file **pnf)
+{
+ return nfsd_file_do_acquire(rqstp, fhp, may_flags, NULL, pnf, false);
+}
+
+/**
+ * nfsd_file_acquire_opened - Get a struct nfsd_file using existing open file
+ * @rqstp: the RPC transaction being executed
+ * @fhp: the NFS filehandle of the file just created
+ * @may_flags: NFSD_MAY_ settings for the file
+ * @file: cached, already-open file (may be NULL)
+ * @pnf: OUT: new or found "struct nfsd_file" object
+ *
+ * Acquire a nfsd_file object that is not GC'ed. If one doesn't already exist,
+ * and @file is non-NULL, use it to instantiate a new nfsd_file instead of
+ * opening a new one.
+ *
+ * Return values:
+ * %nfs_ok - @pnf points to an nfsd_file with its reference
+ * count boosted.
+ *
+ * On error, an nfsstat value in network byte order is returned.
+ */
+__be32
+nfsd_file_acquire_opened(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct file *file,
+ struct nfsd_file **pnf)
+{
+ return nfsd_file_do_acquire(rqstp, fhp, may_flags, file, pnf, false);
+}
+
/*
* Note that fields may be added, removed or reordered in the future. Programs
* scraping this file for info should test the labels to ensure they're
* getting the correct field.
*/
-static int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
+int nfsd_file_cache_stats_show(struct seq_file *m, void *v)
{
- unsigned int i, count = 0, longest = 0;
- unsigned long hits = 0;
+ unsigned long releases = 0, evictions = 0;
+ unsigned long hits = 0, acquisitions = 0;
+ unsigned int i, count = 0, buckets = 0;
+ unsigned long lru = 0, total_age = 0;
- /*
- * No need for spinlocks here since we're not terribly interested in
- * accuracy. We do take the nfsd_mutex simply to ensure that we
- * don't end up racing with server shutdown
- */
+ /* Serialize with server shutdown */
mutex_lock(&nfsd_mutex);
- if (nfsd_file_hashtbl) {
- for (i = 0; i < NFSD_FILE_HASH_SIZE; i++) {
- count += nfsd_file_hashtbl[i].nfb_count;
- longest = max(longest, nfsd_file_hashtbl[i].nfb_count);
- }
+ if (test_bit(NFSD_FILE_CACHE_UP, &nfsd_file_flags) == 1) {
+ struct bucket_table *tbl;
+ struct rhashtable *ht;
+
+ lru = list_lru_count(&nfsd_file_lru);
+
+ rcu_read_lock();
+ ht = &nfsd_file_rhltable.ht;
+ count = atomic_read(&ht->nelems);
+ tbl = rht_dereference_rcu(ht->tbl, ht);
+ buckets = tbl->size;
+ rcu_read_unlock();
}
mutex_unlock(&nfsd_mutex);
- for_each_possible_cpu(i)
+ for_each_possible_cpu(i) {
hits += per_cpu(nfsd_file_cache_hits, i);
+ acquisitions += per_cpu(nfsd_file_acquisitions, i);
+ releases += per_cpu(nfsd_file_releases, i);
+ total_age += per_cpu(nfsd_file_total_age, i);
+ evictions += per_cpu(nfsd_file_evictions, i);
+ }
- seq_printf(m, "total entries: %u\n", count);
- seq_printf(m, "longest chain: %u\n", longest);
+ seq_printf(m, "total inodes: %u\n", count);
+ seq_printf(m, "hash buckets: %u\n", buckets);
+ seq_printf(m, "lru entries: %lu\n", lru);
seq_printf(m, "cache hits: %lu\n", hits);
+ seq_printf(m, "acquisitions: %lu\n", acquisitions);
+ seq_printf(m, "releases: %lu\n", releases);
+ seq_printf(m, "evictions: %lu\n", evictions);
+ if (releases)
+ seq_printf(m, "mean age (ms): %ld\n", total_age / releases);
+ else
+ seq_printf(m, "mean age (ms): -\n");
return 0;
}
-
-int nfsd_file_cache_stats_open(struct inode *inode, struct file *file)
-{
- return single_open(file, nfsd_file_cache_stats_show, NULL);
-}
diff --git a/fs/nfsd/filecache.h b/fs/nfsd/filecache.h
index 435ceab27897..e54165a3224f 100644
--- a/fs/nfsd/filecache.h
+++ b/fs/nfsd/filecache.h
@@ -29,23 +29,23 @@ struct nfsd_file_mark {
* never be dereferenced, only used for comparison.
*/
struct nfsd_file {
- struct hlist_node nf_node;
- struct list_head nf_lru;
- struct rcu_head nf_rcu;
+ struct rhlist_head nf_rlist;
+ void *nf_inode;
struct file *nf_file;
const struct cred *nf_cred;
struct net *nf_net;
#define NFSD_FILE_HASHED (0)
#define NFSD_FILE_PENDING (1)
-#define NFSD_FILE_BREAK_READ (2)
-#define NFSD_FILE_BREAK_WRITE (3)
-#define NFSD_FILE_REFERENCED (4)
+#define NFSD_FILE_REFERENCED (2)
+#define NFSD_FILE_GC (3)
unsigned long nf_flags;
- struct inode *nf_inode;
- unsigned int nf_hashval;
refcount_t nf_ref;
unsigned char nf_may;
+
struct nfsd_file_mark *nf_mark;
+ struct list_head nf_lru;
+ struct rcu_head nf_rcu;
+ ktime_t nf_birthtime;
};
int nfsd_file_cache_init(void);
@@ -57,7 +57,12 @@ void nfsd_file_put(struct nfsd_file *nf);
struct nfsd_file *nfsd_file_get(struct nfsd_file *nf);
void nfsd_file_close_inode_sync(struct inode *inode);
bool nfsd_file_is_cached(struct inode *inode);
+__be32 nfsd_file_acquire_gc(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct nfsd_file **nfp);
__be32 nfsd_file_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned int may_flags, struct nfsd_file **nfp);
-int nfsd_file_cache_stats_open(struct inode *, struct file *);
+__be32 nfsd_file_acquire_opened(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ unsigned int may_flags, struct file *file,
+ struct nfsd_file **nfp);
+int nfsd_file_cache_stats_show(struct seq_file *m, void *v);
#endif /* _FS_NFSD_FILECACHE_H */
diff --git a/fs/nfsd/flexfilelayout.c b/fs/nfsd/flexfilelayout.c
index db7ef07ae50c..fabc21ed68ce 100644
--- a/fs/nfsd/flexfilelayout.c
+++ b/fs/nfsd/flexfilelayout.c
@@ -15,6 +15,7 @@
#include "flexfilelayoutxdr.h"
#include "pnfs.h"
+#include "vfs.h"
#define NFSDDBG_FACILITY NFSDDBG_PNFS
@@ -61,7 +62,7 @@ nfsd4_ff_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
goto out_error;
fl->fh.size = fhp->fh_handle.fh_size;
- memcpy(fl->fh.data, &fhp->fh_handle.fh_base, fl->fh.size);
+ memcpy(fl->fh.data, &fhp->fh_handle.fh_raw, fl->fh.size);
/* Give whole file layout segments */
seg->offset = 0;
diff --git a/fs/nfsd/lockd.c b/fs/nfsd/lockd.c
index 3f5b3d7b62b7..46a7f9b813e5 100644
--- a/fs/nfsd/lockd.c
+++ b/fs/nfsd/lockd.c
@@ -25,18 +25,22 @@
* Note: we hold the dentry use count while the file is open.
*/
static __be32
-nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
+nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp,
+ int mode)
{
__be32 nfserr;
+ int access;
struct svc_fh fh;
/* must initialize before using! but maxsize doesn't matter */
fh_init(&fh,0);
fh.fh_handle.fh_size = f->size;
- memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
+ memcpy(&fh.fh_handle.fh_raw, f->data, f->size);
fh.fh_export = NULL;
- nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
+ access = (mode == O_WRONLY) ? NFSD_MAY_WRITE : NFSD_MAY_READ;
+ access |= NFSD_MAY_LOCK;
+ nfserr = nfsd_open(rqstp, &fh, S_IFREG, access, filp);
fh_put(&fh);
/* We return nlm error codes as nlm doesn't know
* about nfsd, but nfsd does know about nlm..
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 02d3d2f0e616..51a4b7885cae 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -10,6 +10,8 @@
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+#include <linux/percpu_counter.h>
+#include <linux/siphash.h>
/* Hash tables for nfs4_clientid state */
#define CLIENT_HASH_BITS 4
@@ -21,6 +23,14 @@
struct cld_net;
struct nfsd4_client_tracking_ops;
+enum {
+ /* cache misses due only to checksum comparison failures */
+ NFSD_NET_PAYLOAD_MISSES,
+ /* amount of memory (in bytes) currently consumed by the DRC */
+ NFSD_NET_DRC_MEM_USAGE,
+ NFSD_NET_COUNTERS_NUM
+};
+
/*
* Represents a nfsd "container". With respect to nfsv4 state tracking, the
* fields of interest are the *_id_hashtbls and the *_name_tree. These track
@@ -99,9 +109,8 @@ struct nfsd_net {
bool nfsd_net_up;
bool lockd_up;
- /* Time of server startup */
- struct timespec64 nfssvc_boot;
- seqlock_t boot_lock;
+ seqlock_t writeverf_lock;
+ unsigned char writeverf[8];
/*
* Max number of connections this nfsd container will allow. Defaults
@@ -114,12 +123,13 @@ struct nfsd_net {
u32 clverifier_counter;
struct svc_serv *nfsd_serv;
-
- wait_queue_head_t ntf_wq;
- atomic_t ntf_refcnt;
-
- /* Allow umount to wait for nfsd state cleanup */
- struct completion nfsd_shutdown_complete;
+ /* When a listening socket is added to nfsd, keep_active is set
+ * and this justifies a reference on nfsd_serv. This stops
+ * nfsd_serv from being freed. When the number of threads is
+ * set, keep_active is cleared and the reference is dropped. So
+ * when the last thread exits, the service will be destroyed.
+ */
+ int keep_active;
/*
* clientid and stateid data for construction of net unique COPY
@@ -149,20 +159,16 @@ struct nfsd_net {
/*
* Stats and other tracking of on the duplicate reply cache.
- * These fields and the "rc" fields in nfsdstats are modified
- * with only the per-bucket cache lock, which isn't really safe
- * and should be fixed if we want the statistics to be
- * completely accurate.
+ * The longest_chain* fields are modified with only the per-bucket
+ * cache lock, which isn't really safe and should be fixed if we want
+ * these statistics to be completely accurate.
*/
/* total number of entries */
atomic_t num_drc_entries;
- /* cache misses due only to checksum comparison failures */
- unsigned int payload_misses;
-
- /* amount of memory (in bytes) currently consumed by the DRC */
- unsigned int drc_mem_usage;
+ /* Per-netns stats counters */
+ struct percpu_counter counter[NFSD_NET_COUNTERS_NUM];
/* longest hash chain seen */
unsigned int longest_chain;
@@ -171,8 +177,25 @@ struct nfsd_net {
unsigned int longest_chain_cachesize;
struct shrinker nfsd_reply_cache_shrinker;
+
+ /* tracking server-to-server copy mounts */
+ spinlock_t nfsd_ssc_lock;
+ struct list_head nfsd_ssc_mount_list;
+ wait_queue_head_t nfsd_ssc_waitq;
+
/* utsname taken from the process that starts the server */
char nfsd_name[UNX_MAXNODENAME+1];
+
+ struct nfsd_fcache_disposal *fcache_disposal;
+
+ siphash_key_t siphash_key;
+
+ atomic_t nfs4_client_count;
+ int nfs4_max_clients;
+
+ atomic_t nfsd_courtesy_clients;
+ struct shrinker nfsd_client_shrinker;
+ struct work_struct nfsd_shrinker_work;
};
/* Simple check to find out if a given net was properly initialized */
@@ -182,6 +205,6 @@ extern void nfsd_netns_free_versions(struct nfsd_net *nn);
extern unsigned int nfsd_net_id;
-void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn);
-void nfsd_reset_boot_verifier(struct nfsd_net *nn);
+void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn);
+void nfsd_reset_write_verifier(struct nfsd_net *nn);
#endif /* __NFSD_NETNS_H__ */
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index 6a900f770dd2..9adf672dedbd 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -111,7 +111,7 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
if (error)
goto out_errno;
- fh_lock(fh);
+ inode_lock(inode);
error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
if (error)
@@ -120,7 +120,7 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
if (error)
goto out_drop_lock;
- fh_unlock(fh);
+ inode_unlock(inode);
fh_drop_write(fh);
@@ -134,7 +134,7 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
return rpc_success;
out_drop_lock:
- fh_unlock(fh);
+ inode_unlock(inode);
fh_drop_write(fh);
out_errno:
resp->status = nfserrno(error);
@@ -185,161 +185,106 @@ static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
/*
* XDR decode functions
*/
-static int nfsaclsvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
-{
- return 1;
-}
-static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_getaclargs *argp = rqstp->rq_argp;
- p = nfs2svc_decode_fh(p, &argp->fh);
- if (!p)
- return 0;
- argp->mask = ntohl(*p); p++;
+ if (!svcxdr_decode_fhandle(xdr, &argp->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
+ return false;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-
-static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_setaclargs *argp = rqstp->rq_argp;
- struct kvec *head = rqstp->rq_arg.head;
- unsigned int base;
- int n;
-
- p = nfs2svc_decode_fh(p, &argp->fh);
- if (!p)
- return 0;
- argp->mask = ntohl(*p++);
- if (argp->mask & ~NFS_ACL_MASK ||
- !xdr_argsize_check(rqstp, p))
- return 0;
-
- base = (char *)p - (char *)head->iov_base;
- n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
- (argp->mask & NFS_ACL) ?
- &argp->acl_access : NULL);
- if (n > 0)
- n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
- (argp->mask & NFS_DFACL) ?
- &argp->acl_default : NULL);
- return (n > 0);
-}
-static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nfsd_fhandle *argp = rqstp->rq_argp;
-
- p = nfs2svc_decode_fh(p, &argp->fh);
- if (!p)
- return 0;
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_fhandle(xdr, &argp->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
+ return false;
+ if (argp->mask & ~NFS_ACL_MASK)
+ return false;
+ if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
+ &argp->acl_access : NULL))
+ return false;
+ if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
+ &argp->acl_default : NULL))
+ return false;
+
+ return true;
}
-static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nfsd3_accessargs *argp = rqstp->rq_argp;
+ struct nfsd3_accessargs *args = rqstp->rq_argp;
- p = nfs2svc_decode_fh(p, &argp->fh);
- if (!p)
- return 0;
- argp->access = ntohl(*p++);
+ if (!svcxdr_decode_fhandle(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->access) < 0)
+ return false;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
/*
* XDR encode functions
*/
-/*
- * There must be an encoding function for void results so svc_process
- * will work properly.
- */
-static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_ressize_check(rqstp, p);
-}
-
/* GETACL */
-static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_getaclres *resp = rqstp->rq_resp;
struct dentry *dentry = resp->fh.fh_dentry;
struct inode *inode;
- struct kvec *head = rqstp->rq_res.head;
- unsigned int base;
- int n;
- int w;
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- return xdr_ressize_check(rqstp, p);
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
- /*
- * Since this is version 2, the check for nfserr in
- * nfsd_dispatch actually ensures the following cannot happen.
- * However, it seems fragile to depend on that.
- */
if (dentry == NULL || d_really_is_negative(dentry))
- return 0;
+ return true;
inode = d_inode(dentry);
- p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
- *p++ = htonl(resp->mask);
- if (!xdr_ressize_check(rqstp, p))
- return 0;
- base = (char *)p - (char *)head->iov_base;
-
- rqstp->rq_res.page_len = w = nfsacl_size(
- (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
- (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
- while (w > 0) {
- if (!*(rqstp->rq_next_page++))
- return 0;
- w -= PAGE_SIZE;
- }
+ if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
+ return false;
- n = nfsacl_encode(&rqstp->rq_res, base, inode,
- resp->acl_access,
- resp->mask & NFS_ACL, 0);
- if (n > 0)
- n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
- resp->acl_default,
- resp->mask & NFS_DFACL,
- NFS_ACL_DEFAULT);
- return (n > 0);
-}
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
+ resp->mask & NFS_ACL, 0))
+ return false;
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
+ resp->mask & NFS_DFACL, NFS_ACL_DEFAULT))
+ return false;
-static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nfsd_attrstat *resp = rqstp->rq_resp;
-
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- goto out;
-
- p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
-out:
- return xdr_ressize_check(rqstp, p);
+ return true;
}
/* ACCESS */
-static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- goto out;
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->access) < 0)
+ return false;
+ break;
+ }
- p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
- *p++ = htonl(resp->access);
-out:
- return xdr_ressize_check(rqstp, p);
+ return true;
}
/*
@@ -354,13 +299,6 @@ static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp)
posix_acl_release(resp->acl_default);
}
-static void nfsaclsvc_release_attrstat(struct svc_rqst *rqstp)
-{
- struct nfsd_attrstat *resp = rqstp->rq_resp;
-
- fh_put(&resp->fh);
-}
-
static void nfsaclsvc_release_access(struct svc_rqst *rqstp)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
@@ -378,12 +316,14 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_acl_procedures2[5] = {
[ACLPROC2_NULL] = {
.pc_func = nfsacld_proc_null,
- .pc_decode = nfsaclsvc_decode_voidarg,
- .pc_encode = nfsaclsvc_encode_voidres,
- .pc_argsize = sizeof(struct nfsd3_voidargs),
- .pc_ressize = sizeof(struct nfsd3_voidargs),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
+ .pc_name = "NULL",
},
[ACLPROC2_GETACL] = {
.pc_func = nfsacld_proc_getacl,
@@ -391,29 +331,35 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
.pc_encode = nfsaclsvc_encode_getaclres,
.pc_release = nfsaclsvc_release_getacl,
.pc_argsize = sizeof(struct nfsd3_getaclargs),
+ .pc_argzero = sizeof(struct nfsd3_getaclargs),
.pc_ressize = sizeof(struct nfsd3_getaclres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+1+2*(1+ACL),
+ .pc_name = "GETACL",
},
[ACLPROC2_SETACL] = {
.pc_func = nfsacld_proc_setacl,
.pc_decode = nfsaclsvc_decode_setaclargs,
- .pc_encode = nfsaclsvc_encode_attrstatres,
- .pc_release = nfsaclsvc_release_attrstat,
+ .pc_encode = nfssvc_encode_attrstatres,
+ .pc_release = nfssvc_release_attrstat,
.pc_argsize = sizeof(struct nfsd3_setaclargs),
+ .pc_argzero = sizeof(struct nfsd3_setaclargs),
.pc_ressize = sizeof(struct nfsd_attrstat),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT,
+ .pc_name = "SETACL",
},
[ACLPROC2_GETATTR] = {
.pc_func = nfsacld_proc_getattr,
- .pc_decode = nfsaclsvc_decode_fhandleargs,
- .pc_encode = nfsaclsvc_encode_attrstatres,
- .pc_release = nfsaclsvc_release_attrstat,
+ .pc_decode = nfssvc_decode_fhandleargs,
+ .pc_encode = nfssvc_encode_attrstatres,
+ .pc_release = nfssvc_release_attrstat,
.pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd_attrstat),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT,
+ .pc_name = "GETATTR",
},
[ACLPROC2_ACCESS] = {
.pc_func = nfsacld_proc_access,
@@ -421,9 +367,11 @@ static const struct svc_procedure nfsd_acl_procedures2[5] = {
.pc_encode = nfsaclsvc_encode_accessres,
.pc_release = nfsaclsvc_release_access,
.pc_argsize = sizeof(struct nfsd3_accessargs),
+ .pc_argzero = sizeof(struct nfsd3_accessargs),
.pc_ressize = sizeof(struct nfsd3_accessres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT+1,
+ .pc_name = "SETATTR",
},
};
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 34a394e50e1d..161f831b3a1b 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -101,7 +101,7 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
if (error)
goto out_errno;
- fh_lock(fh);
+ inode_lock(inode);
error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
if (error)
@@ -109,7 +109,7 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
out_drop_lock:
- fh_unlock(fh);
+ inode_unlock(inode);
fh_drop_write(fh);
out_errno:
resp->status = nfserrno(error);
@@ -124,43 +124,39 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
/*
* XDR decode functions
*/
-static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
+
+static bool
+nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_getaclargs *args = rqstp->rq_argp;
- p = nfs3svc_decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->mask = ntohl(*p); p++;
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->mask) < 0)
+ return false;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-
-static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
- struct nfsd3_setaclargs *args = rqstp->rq_argp;
- struct kvec *head = rqstp->rq_arg.head;
- unsigned int base;
- int n;
-
- p = nfs3svc_decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->mask = ntohl(*p++);
- if (args->mask & ~NFS_ACL_MASK ||
- !xdr_argsize_check(rqstp, p))
- return 0;
-
- base = (char *)p - (char *)head->iov_base;
- n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
- (args->mask & NFS_ACL) ?
- &args->acl_access : NULL);
- if (n > 0)
- n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
- (args->mask & NFS_DFACL) ?
- &args->acl_default : NULL);
- return (n > 0);
+ struct nfsd3_setaclargs *argp = rqstp->rq_argp;
+
+ if (!svcxdr_decode_nfs_fh3(xdr, &argp->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &argp->mask) < 0)
+ return false;
+ if (argp->mask & ~NFS_ACL_MASK)
+ return false;
+ if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ?
+ &argp->acl_access : NULL))
+ return false;
+ if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ?
+ &argp->acl_default : NULL))
+ return false;
+
+ return true;
}
/*
@@ -168,59 +164,47 @@ static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
*/
/* GETACL */
-static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfs3svc_encode_getaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_getaclres *resp = rqstp->rq_resp;
struct dentry *dentry = resp->fh.fh_dentry;
+ struct inode *inode;
- *p++ = resp->status;
- p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
- if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
- struct inode *inode = d_inode(dentry);
- struct kvec *head = rqstp->rq_res.head;
- unsigned int base;
- int n;
- int w;
-
- *p++ = htonl(resp->mask);
- if (!xdr_ressize_check(rqstp, p))
- return 0;
- base = (char *)p - (char *)head->iov_base;
-
- rqstp->rq_res.page_len = w = nfsacl_size(
- (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
- (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
- while (w > 0) {
- if (!*(rqstp->rq_next_page++))
- return 0;
- w -= PAGE_SIZE;
- }
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ inode = d_inode(dentry);
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->mask) < 0)
+ return false;
+
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access,
+ resp->mask & NFS_ACL, 0))
+ return false;
+ if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default,
+ resp->mask & NFS_DFACL,
+ NFS_ACL_DEFAULT))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
- n = nfsacl_encode(&rqstp->rq_res, base, inode,
- resp->acl_access,
- resp->mask & NFS_ACL, 0);
- if (n > 0)
- n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
- resp->acl_default,
- resp->mask & NFS_DFACL,
- NFS_ACL_DEFAULT);
- if (n <= 0)
- return 0;
- } else
- if (!xdr_ressize_check(rqstp, p))
- return 0;
-
- return 1;
+ return true;
}
/* SETACL */
-static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p)
+static bool
+nfs3svc_encode_setaclres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
- return xdr_ressize_check(rqstp, p);
+ return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+ svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh);
}
/*
@@ -245,12 +229,14 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_acl_procedures3[3] = {
[ACLPROC3_NULL] = {
.pc_func = nfsd3_proc_null,
- .pc_decode = nfs3svc_decode_voidarg,
- .pc_encode = nfs3svc_encode_voidres,
- .pc_argsize = sizeof(struct nfsd3_voidargs),
- .pc_ressize = sizeof(struct nfsd3_voidargs),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
+ .pc_name = "NULL",
},
[ACLPROC3_GETACL] = {
.pc_func = nfsd3_proc_getacl,
@@ -258,9 +244,11 @@ static const struct svc_procedure nfsd_acl_procedures3[3] = {
.pc_encode = nfs3svc_encode_getaclres,
.pc_release = nfs3svc_release_getacl,
.pc_argsize = sizeof(struct nfsd3_getaclargs),
+ .pc_argzero = sizeof(struct nfsd3_getaclargs),
.pc_ressize = sizeof(struct nfsd3_getaclres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+1+2*(1+ACL),
+ .pc_name = "GETACL",
},
[ACLPROC3_SETACL] = {
.pc_func = nfsd3_proc_setacl,
@@ -268,9 +256,11 @@ static const struct svc_procedure nfsd_acl_procedures3[3] = {
.pc_encode = nfs3svc_encode_setaclres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_setaclargs),
+ .pc_argzero = sizeof(struct nfsd3_setaclargs),
.pc_ressize = sizeof(struct nfsd3_attrstat),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT,
+ .pc_name = "SETACL",
},
};
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 981a4e4c9a3c..19cf583096d9 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -8,10 +8,12 @@
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/magic.h>
+#include <linux/namei.h>
#include "cache.h"
#include "xdr3.h"
#include "vfs.h"
+#include "filecache.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -66,12 +68,15 @@ nfsd3_proc_setattr(struct svc_rqst *rqstp)
{
struct nfsd3_sattrargs *argp = rqstp->rq_argp;
struct nfsd3_attrstat *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
dprintk("nfsd: SETATTR(3) %s\n",
SVCFH_fmt(&argp->fh));
fh_copy(&resp->fh, &argp->fh);
- resp->status = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
+ resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs,
argp->check_guard, argp->guardtime);
return rpc_success;
}
@@ -124,7 +129,7 @@ nfsd3_proc_access(struct svc_rqst *rqstp)
static __be32
nfsd3_proc_readlink(struct svc_rqst *rqstp)
{
- struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
+ struct nfsd_fhandle *argp = rqstp->rq_argp;
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
@@ -132,7 +137,9 @@ nfsd3_proc_readlink(struct svc_rqst *rqstp)
/* Read the symlink. */
fh_copy(&resp->fh, &argp->fh);
resp->len = NFS3_MAXPATHLEN;
- resp->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
+ resp->pages = rqstp->rq_next_page++;
+ resp->status = nfsd_readlink(rqstp, &resp->fh,
+ page_address(*resp->pages), &resp->len);
return rpc_success;
}
@@ -144,25 +151,43 @@ nfsd3_proc_read(struct svc_rqst *rqstp)
{
struct nfsd3_readargs *argp = rqstp->rq_argp;
struct nfsd3_readres *resp = rqstp->rq_resp;
- u32 max_blocksize = svc_max_payload(rqstp);
- unsigned long cnt = min(argp->count, max_blocksize);
+ unsigned int len;
+ int v;
dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
SVCFH_fmt(&argp->fh),
(unsigned long) argp->count,
(unsigned long long) argp->offset);
+ argp->count = min_t(u32, argp->count, svc_max_payload(rqstp));
+ argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
+ if (argp->offset > (u64)OFFSET_MAX)
+ argp->offset = (u64)OFFSET_MAX;
+ if (argp->offset + argp->count > (u64)OFFSET_MAX)
+ argp->count = (u64)OFFSET_MAX - argp->offset;
+
+ v = 0;
+ len = argp->count;
+ resp->pages = rqstp->rq_next_page;
+ while (len > 0) {
+ struct page *page = *(rqstp->rq_next_page++);
+
+ rqstp->rq_vec[v].iov_base = page_address(page);
+ rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
+ len -= rqstp->rq_vec[v].iov_len;
+ v++;
+ }
+
/* Obtain buffer pointer for payload.
* 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
* + 1 (xdr opaque byte count) = 26
*/
- resp->count = cnt;
+ resp->count = argp->count;
svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
fh_copy(&resp->fh, &argp->fh);
resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
- rqstp->rq_vec, argp->vlen, &resp->count,
- &resp->eof);
+ rqstp->rq_vec, v, &resp->count, &resp->eof);
return rpc_success;
}
@@ -190,32 +215,147 @@ nfsd3_proc_write(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->committed = argp->stable;
- nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
- &argp->first, cnt);
- if (!nvecs) {
- resp->status = nfserr_io;
- goto out;
- }
+ nvecs = svc_fill_write_vector(rqstp, &argp->payload);
+
resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
rqstp->rq_vec, nvecs, &cnt,
resp->committed, resp->verf);
resp->count = cnt;
-out:
return rpc_success;
}
/*
- * With NFSv3, CREATE processing is a lot easier than with NFSv2.
- * At least in theory; we'll see how it fares in practice when the
- * first reports about SunOS compatibility problems start to pour in...
+ * Implement NFSv3's unchecked, guarded, and exclusive CREATE
+ * semantics for regular files. Except for the created file,
+ * this operation is stateless on the server.
+ *
+ * Upon return, caller must release @fhp and @resfhp.
*/
+static __be32
+nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct svc_fh *resfhp, struct nfsd3_createargs *argp)
+{
+ struct iattr *iap = &argp->attrs;
+ struct dentry *parent, *child;
+ struct nfsd_attrs attrs = {
+ .na_iattr = iap,
+ };
+ __u32 v_mtime, v_atime;
+ struct inode *inode;
+ __be32 status;
+ int host_err;
+
+ if (isdotent(argp->name, argp->len))
+ return nfserr_exist;
+ if (!(iap->ia_valid & ATTR_MODE))
+ iap->ia_mode = 0;
+
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
+ if (status != nfs_ok)
+ return status;
+
+ parent = fhp->fh_dentry;
+ inode = d_inode(parent);
+
+ host_err = fh_want_write(fhp);
+ if (host_err)
+ return nfserrno(host_err);
+
+ inode_lock_nested(inode, I_MUTEX_PARENT);
+
+ child = lookup_one_len(argp->name, parent, argp->len);
+ if (IS_ERR(child)) {
+ status = nfserrno(PTR_ERR(child));
+ goto out;
+ }
+
+ if (d_really_is_negative(child)) {
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
+ if (status != nfs_ok)
+ goto out;
+ }
+
+ status = fh_compose(resfhp, fhp->fh_export, child, fhp);
+ if (status != nfs_ok)
+ goto out;
+
+ v_mtime = 0;
+ v_atime = 0;
+ if (argp->createmode == NFS3_CREATE_EXCLUSIVE) {
+ u32 *verifier = (u32 *)argp->verf;
+
+ /*
+ * Solaris 7 gets confused (bugid 4218508) if these have
+ * the high bit set, as do xfs filesystems without the
+ * "bigtime" feature. So just clear the high bits.
+ */
+ v_mtime = verifier[0] & 0x7fffffff;
+ v_atime = verifier[1] & 0x7fffffff;
+ }
+
+ if (d_really_is_positive(child)) {
+ status = nfs_ok;
+
+ switch (argp->createmode) {
+ case NFS3_CREATE_UNCHECKED:
+ if (!d_is_reg(child))
+ break;
+ iap->ia_valid &= ATTR_SIZE;
+ goto set_attr;
+ case NFS3_CREATE_GUARDED:
+ status = nfserr_exist;
+ break;
+ case NFS3_CREATE_EXCLUSIVE:
+ if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
+ d_inode(child)->i_atime.tv_sec == v_atime &&
+ d_inode(child)->i_size == 0) {
+ break;
+ }
+ status = nfserr_exist;
+ }
+ goto out;
+ }
+
+ if (!IS_POSIXACL(inode))
+ iap->ia_mode &= ~current_umask();
+
+ fh_fill_pre_attrs(fhp);
+ host_err = vfs_create(inode, child, iap->ia_mode, true);
+ if (host_err < 0) {
+ status = nfserrno(host_err);
+ goto out;
+ }
+ fh_fill_post_attrs(fhp);
+
+ /* A newly created file already has a file size of zero. */
+ if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
+ iap->ia_valid &= ~ATTR_SIZE;
+ if (argp->createmode == NFS3_CREATE_EXCLUSIVE) {
+ iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
+ ATTR_MTIME_SET | ATTR_ATIME_SET;
+ iap->ia_mtime.tv_sec = v_mtime;
+ iap->ia_atime.tv_sec = v_atime;
+ iap->ia_mtime.tv_nsec = 0;
+ iap->ia_atime.tv_nsec = 0;
+ }
+
+set_attr:
+ status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
+
+out:
+ inode_unlock(inode);
+ if (child && !IS_ERR(child))
+ dput(child);
+ fh_drop_write(fhp);
+ return status;
+}
+
static __be32
nfsd3_proc_create(struct svc_rqst *rqstp)
{
struct nfsd3_createargs *argp = rqstp->rq_argp;
struct nfsd3_diropres *resp = rqstp->rq_resp;
- svc_fh *dirfhp, *newfhp = NULL;
- struct iattr *attr;
+ svc_fh *dirfhp, *newfhp;
dprintk("nfsd: CREATE(3) %s %.*s\n",
SVCFH_fmt(&argp->fh),
@@ -224,21 +364,8 @@ nfsd3_proc_create(struct svc_rqst *rqstp)
dirfhp = fh_copy(&resp->dirfh, &argp->fh);
newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
- attr = &argp->attrs;
-
- /* Unfudge the mode bits */
- attr->ia_mode &= ~S_IFMT;
- if (!(attr->ia_valid & ATTR_MODE)) {
- attr->ia_valid |= ATTR_MODE;
- attr->ia_mode = S_IFREG;
- } else {
- attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
- }
- /* Now create the file and set attributes */
- resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
- attr, newfhp, argp->createmode,
- (u32 *)argp->verf, NULL, NULL);
+ resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp);
return rpc_success;
}
@@ -250,6 +377,9 @@ nfsd3_proc_mkdir(struct svc_rqst *rqstp)
{
struct nfsd3_createargs *argp = rqstp->rq_argp;
struct nfsd3_diropres *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
dprintk("nfsd: MKDIR(3) %s %.*s\n",
SVCFH_fmt(&argp->fh),
@@ -260,8 +390,7 @@ nfsd3_proc_mkdir(struct svc_rqst *rqstp)
fh_copy(&resp->dirfh, &argp->fh);
fh_init(&resp->fh, NFS3_FHSIZE);
resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
- &argp->attrs, S_IFDIR, 0, &resp->fh);
- fh_unlock(&resp->dirfh);
+ &attrs, S_IFDIR, 0, &resp->fh);
return rpc_success;
}
@@ -270,6 +399,9 @@ nfsd3_proc_symlink(struct svc_rqst *rqstp)
{
struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
struct nfsd3_diropres *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
if (argp->tlen == 0) {
resp->status = nfserr_inval;
@@ -296,7 +428,7 @@ nfsd3_proc_symlink(struct svc_rqst *rqstp)
fh_copy(&resp->dirfh, &argp->ffh);
fh_init(&resp->fh, NFS3_FHSIZE);
resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
- argp->flen, argp->tname, &resp->fh);
+ argp->flen, argp->tname, &attrs, &resp->fh);
kfree(argp->tname);
out:
return rpc_success;
@@ -310,6 +442,9 @@ nfsd3_proc_mknod(struct svc_rqst *rqstp)
{
struct nfsd3_mknodargs *argp = rqstp->rq_argp;
struct nfsd3_diropres *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
int type;
dev_t rdev = 0;
@@ -335,8 +470,7 @@ nfsd3_proc_mknod(struct svc_rqst *rqstp)
type = nfs3_ftypes[argp->ftype];
resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
- &argp->attrs, type, rdev, &resp->fh);
- fh_unlock(&resp->dirfh);
+ &attrs, type, rdev, &resp->fh);
out:
return rpc_success;
}
@@ -359,7 +493,6 @@ nfsd3_proc_remove(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
argp->name, argp->len);
- fh_unlock(&resp->fh);
return rpc_success;
}
@@ -380,7 +513,6 @@ nfsd3_proc_rmdir(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
argp->name, argp->len);
- fh_unlock(&resp->fh);
return rpc_success;
}
@@ -426,6 +558,26 @@ nfsd3_proc_link(struct svc_rqst *rqstp)
return rpc_success;
}
+static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
+ struct nfsd3_readdirres *resp,
+ u32 count)
+{
+ struct xdr_buf *buf = &resp->dirlist;
+ struct xdr_stream *xdr = &resp->xdr;
+ unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen,
+ svc_max_payload(rqstp));
+
+ memset(buf, 0, sizeof(*buf));
+
+ /* Reserve room for the NULL ptr & eof flag (-2 words) */
+ buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf);
+ buf->buflen -= XDR_UNIT * 2;
+ buf->pages = rqstp->rq_next_page;
+ rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+ xdr_init_encode_pages(xdr, buf, buf->pages, NULL);
+}
+
/*
* Read a portion of a directory.
*/
@@ -434,53 +586,26 @@ nfsd3_proc_readdir(struct svc_rqst *rqstp)
{
struct nfsd3_readdirargs *argp = rqstp->rq_argp;
struct nfsd3_readdirres *resp = rqstp->rq_resp;
- int count = 0;
- struct page **p;
- caddr_t page_addr = NULL;
+ loff_t offset;
dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->count, (u32) argp->cookie);
- /* Make sure we've room for the NULL ptr & eof flag, and shrink to
- * client read size */
- count = (argp->count >> 2) - 2;
+ nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
- /* Read directory and encode entries on the fly */
fh_copy(&resp->fh, &argp->fh);
-
- resp->buflen = count;
resp->common.err = nfs_ok;
- resp->buffer = argp->buffer;
+ resp->cookie_offset = 0;
resp->rqstp = rqstp;
- resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie,
- &resp->common, nfs3svc_encode_entry);
+ offset = argp->cookie;
+ resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
+ &resp->common, nfs3svc_encode_entry3);
memcpy(resp->verf, argp->verf, 8);
- count = 0;
- for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
- page_addr = page_address(*p);
+ nfs3svc_encode_cookie3(resp, offset);
- if (((caddr_t)resp->buffer >= page_addr) &&
- ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
- count += (caddr_t)resp->buffer - page_addr;
- break;
- }
- count += PAGE_SIZE;
- }
- resp->count = count >> 2;
- if (resp->offset) {
- loff_t offset = argp->cookie;
-
- if (unlikely(resp->offset1)) {
- /* we ended up with offset on a page boundary */
- *resp->offset = htonl(offset >> 32);
- *resp->offset1 = htonl(offset & 0xffffffff);
- resp->offset1 = NULL;
- } else {
- xdr_encode_hyper(resp->offset, offset);
- }
- resp->offset = NULL;
- }
+ /* Recycle only pages that were part of the reply */
+ rqstp->rq_next_page = resp->xdr.page_ptr + 1;
return rpc_success;
}
@@ -494,25 +619,17 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
{
struct nfsd3_readdirargs *argp = rqstp->rq_argp;
struct nfsd3_readdirres *resp = rqstp->rq_resp;
- int count = 0;
loff_t offset;
- struct page **p;
- caddr_t page_addr = NULL;
dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->count, (u32) argp->cookie);
- /* Convert byte count to number of words (i.e. >> 2),
- * and reserve room for the NULL ptr & eof flag (-2 words) */
- resp->count = (argp->count >> 2) - 2;
+ nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
- /* Read directory and encode entries on the fly */
fh_copy(&resp->fh, &argp->fh);
-
resp->common.err = nfs_ok;
- resp->buffer = argp->buffer;
- resp->buflen = resp->count;
+ resp->cookie_offset = 0;
resp->rqstp = rqstp;
offset = argp->cookie;
@@ -526,30 +643,12 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
}
resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
- &resp->common, nfs3svc_encode_entry_plus);
+ &resp->common, nfs3svc_encode_entryplus3);
memcpy(resp->verf, argp->verf, 8);
- for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
- page_addr = page_address(*p);
+ nfs3svc_encode_cookie3(resp, offset);
- if (((caddr_t)resp->buffer >= page_addr) &&
- ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
- count += (caddr_t)resp->buffer - page_addr;
- break;
- }
- count += PAGE_SIZE;
- }
- resp->count = count >> 2;
- if (resp->offset) {
- if (unlikely(resp->offset1)) {
- /* we ended up with offset on a page boundary */
- *resp->offset = htonl(offset >> 32);
- *resp->offset1 = htonl(offset & 0xffffffff);
- resp->offset1 = NULL;
- } else {
- xdr_encode_hyper(resp->offset, offset);
- }
- resp->offset = NULL;
- }
+ /* Recycle only pages that were part of the reply */
+ rqstp->rq_next_page = resp->xdr.page_ptr + 1;
out:
return rpc_success;
@@ -665,20 +764,21 @@ nfsd3_proc_commit(struct svc_rqst *rqstp)
{
struct nfsd3_commitargs *argp = rqstp->rq_argp;
struct nfsd3_commitres *resp = rqstp->rq_resp;
+ struct nfsd_file *nf;
dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
SVCFH_fmt(&argp->fh),
argp->count,
(unsigned long long) argp->offset);
- if (argp->offset > NFS_OFFSET_MAX) {
- resp->status = nfserr_inval;
- goto out;
- }
-
fh_copy(&resp->fh, &argp->fh);
- resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
+ resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE |
+ NFSD_MAY_NOT_BREAK_LEASE, &nf);
+ if (resp->status)
+ goto out;
+ resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset,
argp->count, resp->verf);
+ nfsd_file_put(nf);
out:
return rpc_success;
}
@@ -688,18 +788,14 @@ nfsd3_proc_commit(struct svc_rqst *rqstp)
* NFSv3 Server procedures.
* Only the results of non-idempotent operations are cached.
*/
-#define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
#define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
#define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
#define nfsd3_mkdirargs nfsd3_createargs
#define nfsd3_readdirplusargs nfsd3_readdirargs
#define nfsd3_fhandleargs nfsd_fhandle
-#define nfsd3_fhandleres nfsd3_attrstat
#define nfsd3_attrstatres nfsd3_attrstat
#define nfsd3_wccstatres nfsd3_attrstat
#define nfsd3_createres nfsd3_diropres
-#define nfsd3_voidres nfsd3_voidargs
-struct nfsd3_voidargs { int dummy; };
#define ST 1 /* status*/
#define FH 17 /* filehandle with length */
@@ -710,22 +806,26 @@ struct nfsd3_voidargs { int dummy; };
static const struct svc_procedure nfsd_procedures3[22] = {
[NFS3PROC_NULL] = {
.pc_func = nfsd3_proc_null,
- .pc_decode = nfs3svc_decode_voidarg,
- .pc_encode = nfs3svc_encode_voidres,
- .pc_argsize = sizeof(struct nfsd3_voidargs),
- .pc_ressize = sizeof(struct nfsd3_voidres),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
+ .pc_name = "NULL",
},
[NFS3PROC_GETATTR] = {
.pc_func = nfsd3_proc_getattr,
.pc_decode = nfs3svc_decode_fhandleargs,
- .pc_encode = nfs3svc_encode_attrstatres,
+ .pc_encode = nfs3svc_encode_getattrres,
.pc_release = nfs3svc_release_fhandle,
- .pc_argsize = sizeof(struct nfsd3_fhandleargs),
+ .pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd3_attrstatres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT,
+ .pc_name = "GETATTR",
},
[NFS3PROC_SETATTR] = {
.pc_func = nfsd3_proc_setattr,
@@ -733,19 +833,23 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_wccstatres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_sattrargs),
+ .pc_argzero = sizeof(struct nfsd3_sattrargs),
.pc_ressize = sizeof(struct nfsd3_wccstatres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+WC,
+ .pc_name = "SETATTR",
},
[NFS3PROC_LOOKUP] = {
.pc_func = nfsd3_proc_lookup,
.pc_decode = nfs3svc_decode_diropargs,
- .pc_encode = nfs3svc_encode_diropres,
+ .pc_encode = nfs3svc_encode_lookupres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_diropargs),
+ .pc_argzero = sizeof(struct nfsd3_diropargs),
.pc_ressize = sizeof(struct nfsd3_diropres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+FH+pAT+pAT,
+ .pc_name = "LOOKUP",
},
[NFS3PROC_ACCESS] = {
.pc_func = nfsd3_proc_access,
@@ -753,19 +857,23 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_accessres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_accessargs),
+ .pc_argzero = sizeof(struct nfsd3_accessargs),
.pc_ressize = sizeof(struct nfsd3_accessres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+1,
+ .pc_name = "ACCESS",
},
[NFS3PROC_READLINK] = {
.pc_func = nfsd3_proc_readlink,
- .pc_decode = nfs3svc_decode_readlinkargs,
+ .pc_decode = nfs3svc_decode_fhandleargs,
.pc_encode = nfs3svc_encode_readlinkres,
.pc_release = nfs3svc_release_fhandle,
- .pc_argsize = sizeof(struct nfsd3_readlinkargs),
+ .pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd3_readlinkres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
+ .pc_name = "READLINK",
},
[NFS3PROC_READ] = {
.pc_func = nfsd3_proc_read,
@@ -773,9 +881,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_readres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_readargs),
+ .pc_argzero = sizeof(struct nfsd3_readargs),
.pc_ressize = sizeof(struct nfsd3_readres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
+ .pc_name = "READ",
},
[NFS3PROC_WRITE] = {
.pc_func = nfsd3_proc_write,
@@ -783,9 +893,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_writeres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_writeargs),
+ .pc_argzero = sizeof(struct nfsd3_writeargs),
.pc_ressize = sizeof(struct nfsd3_writeres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+WC+4,
+ .pc_name = "WRITE",
},
[NFS3PROC_CREATE] = {
.pc_func = nfsd3_proc_create,
@@ -793,9 +905,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_createres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_createargs),
+ .pc_argzero = sizeof(struct nfsd3_createargs),
.pc_ressize = sizeof(struct nfsd3_createres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+(1+FH+pAT)+WC,
+ .pc_name = "CREATE",
},
[NFS3PROC_MKDIR] = {
.pc_func = nfsd3_proc_mkdir,
@@ -803,9 +917,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_createres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_mkdirargs),
+ .pc_argzero = sizeof(struct nfsd3_mkdirargs),
.pc_ressize = sizeof(struct nfsd3_createres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+(1+FH+pAT)+WC,
+ .pc_name = "MKDIR",
},
[NFS3PROC_SYMLINK] = {
.pc_func = nfsd3_proc_symlink,
@@ -813,9 +929,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_createres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_symlinkargs),
+ .pc_argzero = sizeof(struct nfsd3_symlinkargs),
.pc_ressize = sizeof(struct nfsd3_createres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+(1+FH+pAT)+WC,
+ .pc_name = "SYMLINK",
},
[NFS3PROC_MKNOD] = {
.pc_func = nfsd3_proc_mknod,
@@ -823,9 +941,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_createres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_mknodargs),
+ .pc_argzero = sizeof(struct nfsd3_mknodargs),
.pc_ressize = sizeof(struct nfsd3_createres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+(1+FH+pAT)+WC,
+ .pc_name = "MKNOD",
},
[NFS3PROC_REMOVE] = {
.pc_func = nfsd3_proc_remove,
@@ -833,9 +953,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_wccstatres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_diropargs),
+ .pc_argzero = sizeof(struct nfsd3_diropargs),
.pc_ressize = sizeof(struct nfsd3_wccstatres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+WC,
+ .pc_name = "REMOVE",
},
[NFS3PROC_RMDIR] = {
.pc_func = nfsd3_proc_rmdir,
@@ -843,9 +965,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_wccstatres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_diropargs),
+ .pc_argzero = sizeof(struct nfsd3_diropargs),
.pc_ressize = sizeof(struct nfsd3_wccstatres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+WC,
+ .pc_name = "RMDIR",
},
[NFS3PROC_RENAME] = {
.pc_func = nfsd3_proc_rename,
@@ -853,9 +977,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_renameres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_renameargs),
+ .pc_argzero = sizeof(struct nfsd3_renameargs),
.pc_ressize = sizeof(struct nfsd3_renameres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+WC+WC,
+ .pc_name = "RENAME",
},
[NFS3PROC_LINK] = {
.pc_func = nfsd3_proc_link,
@@ -863,9 +989,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_linkres,
.pc_release = nfs3svc_release_fhandle2,
.pc_argsize = sizeof(struct nfsd3_linkargs),
+ .pc_argzero = sizeof(struct nfsd3_linkargs),
.pc_ressize = sizeof(struct nfsd3_linkres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+pAT+WC,
+ .pc_name = "LINK",
},
[NFS3PROC_READDIR] = {
.pc_func = nfsd3_proc_readdir,
@@ -873,8 +1001,10 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_readdirres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_readdirargs),
+ .pc_argzero = sizeof(struct nfsd3_readdirargs),
.pc_ressize = sizeof(struct nfsd3_readdirres),
.pc_cachetype = RC_NOCACHE,
+ .pc_name = "READDIR",
},
[NFS3PROC_READDIRPLUS] = {
.pc_func = nfsd3_proc_readdirplus,
@@ -882,35 +1012,43 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_readdirres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_readdirplusargs),
+ .pc_argzero = sizeof(struct nfsd3_readdirplusargs),
.pc_ressize = sizeof(struct nfsd3_readdirres),
.pc_cachetype = RC_NOCACHE,
+ .pc_name = "READDIRPLUS",
},
[NFS3PROC_FSSTAT] = {
.pc_func = nfsd3_proc_fsstat,
.pc_decode = nfs3svc_decode_fhandleargs,
.pc_encode = nfs3svc_encode_fsstatres,
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+ .pc_argzero = sizeof(struct nfsd3_fhandleargs),
.pc_ressize = sizeof(struct nfsd3_fsstatres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+2*6+1,
+ .pc_name = "FSSTAT",
},
[NFS3PROC_FSINFO] = {
.pc_func = nfsd3_proc_fsinfo,
.pc_decode = nfs3svc_decode_fhandleargs,
.pc_encode = nfs3svc_encode_fsinfores,
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+ .pc_argzero = sizeof(struct nfsd3_fhandleargs),
.pc_ressize = sizeof(struct nfsd3_fsinfores),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+12,
+ .pc_name = "FSINFO",
},
[NFS3PROC_PATHCONF] = {
.pc_func = nfsd3_proc_pathconf,
.pc_decode = nfs3svc_decode_fhandleargs,
.pc_encode = nfs3svc_encode_pathconfres,
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
+ .pc_argzero = sizeof(struct nfsd3_fhandleargs),
.pc_ressize = sizeof(struct nfsd3_pathconfres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+pAT+6,
+ .pc_name = "PATHCONF",
},
[NFS3PROC_COMMIT] = {
.pc_func = nfsd3_proc_commit,
@@ -918,9 +1056,11 @@ static const struct svc_procedure nfsd_procedures3[22] = {
.pc_encode = nfs3svc_encode_commitres,
.pc_release = nfs3svc_release_fhandle,
.pc_argsize = sizeof(struct nfsd3_commitargs),
+ .pc_argzero = sizeof(struct nfsd3_commitargs),
.pc_ressize = sizeof(struct nfsd3_commitres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+WC+2,
+ .pc_name = "COMMIT",
},
};
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 716566da400e..3308dd671ef0 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -14,13 +14,26 @@
#include "netns.h"
#include "vfs.h"
-#define NFSDDBG_FACILITY NFSDDBG_XDR
+/*
+ * Force construction of an empty post-op attr
+ */
+static const struct svc_fh nfs3svc_null_fh = {
+ .fh_no_wcc = true,
+};
+/*
+ * time_delta. {1, 0} means the server is accurate only
+ * to the nearest second.
+ */
+static const struct timespec64 nfs3svc_time_delta = {
+ .tv_sec = 1,
+ .tv_nsec = 0,
+};
/*
* Mapping of S_IF* types to NFS file types
*/
-static u32 nfs3_ftypes[] = {
+static const u32 nfs3_ftypes[] = {
NF3NON, NF3FIFO, NF3CHR, NF3BAD,
NF3DIR, NF3BAD, NF3BLK, NF3BAD,
NF3REG, NF3BAD, NF3LNK, NF3BAD,
@@ -29,824 +42,938 @@ static u32 nfs3_ftypes[] = {
/*
- * XDR functions for basic NFS types
+ * Basic NFSv3 data types (RFC 1813 Sections 2.5 and 2.6)
*/
+
static __be32 *
-encode_time3(__be32 *p, struct timespec64 *time)
+encode_nfstime3(__be32 *p, const struct timespec64 *time)
{
- *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
+ *p++ = cpu_to_be32((u32)time->tv_sec);
+ *p++ = cpu_to_be32(time->tv_nsec);
+
return p;
}
-static __be32 *
-decode_time3(__be32 *p, struct timespec64 *time)
+static bool
+svcxdr_decode_nfstime3(struct xdr_stream *xdr, struct timespec64 *timep)
{
- time->tv_sec = ntohl(*p++);
- time->tv_nsec = ntohl(*p++);
- return p;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, XDR_UNIT * 2);
+ if (!p)
+ return false;
+ timep->tv_sec = be32_to_cpup(p++);
+ timep->tv_nsec = be32_to_cpup(p);
+
+ return true;
}
-static __be32 *
-decode_fh(__be32 *p, struct svc_fh *fhp)
+/**
+ * svcxdr_decode_nfs_fh3 - Decode an NFSv3 file handle
+ * @xdr: XDR stream positioned at an undecoded NFSv3 FH
+ * @fhp: OUT: filled-in server file handle
+ *
+ * Return values:
+ * %false: The encoded file handle was not valid
+ * %true: @fhp has been initialized
+ */
+bool
+svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp)
{
- unsigned int size;
+ __be32 *p;
+ u32 size;
+
+ if (xdr_stream_decode_u32(xdr, &size) < 0)
+ return false;
+ if (size == 0 || size > NFS3_FHSIZE)
+ return false;
+ p = xdr_inline_decode(xdr, size);
+ if (!p)
+ return false;
fh_init(fhp, NFS3_FHSIZE);
- size = ntohl(*p++);
- if (size > NFS3_FHSIZE)
- return NULL;
-
- memcpy(&fhp->fh_handle.fh_base, p, size);
fhp->fh_handle.fh_size = size;
- return p + XDR_QUADLEN(size);
+ memcpy(&fhp->fh_handle.fh_raw, p, size);
+
+ return true;
}
-/* Helper function for NFSv3 ACL code */
-__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
+/**
+ * svcxdr_encode_nfsstat3 - Encode an NFSv3 status code
+ * @xdr: XDR stream
+ * @status: status value to encode
+ *
+ * Return values:
+ * %false: Send buffer space was exhausted
+ * %true: Success
+ */
+bool
+svcxdr_encode_nfsstat3(struct xdr_stream *xdr, __be32 status)
{
- return decode_fh(p, fhp);
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, sizeof(status));
+ if (!p)
+ return false;
+ *p = status;
+
+ return true;
}
-static __be32 *
-encode_fh(__be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_nfs_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
+{
+ u32 size = fhp->fh_handle.fh_size;
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT + size);
+ if (!p)
+ return false;
+ *p++ = cpu_to_be32(size);
+ if (size)
+ p[XDR_QUADLEN(size) - 1] = 0;
+ memcpy(p, &fhp->fh_handle.fh_raw, size);
+
+ return true;
+}
+
+static bool
+svcxdr_encode_post_op_fh3(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
- unsigned int size = fhp->fh_handle.fh_size;
- *p++ = htonl(size);
- if (size) p[XDR_QUADLEN(size)-1]=0;
- memcpy(p, &fhp->fh_handle.fh_base, size);
- return p + XDR_QUADLEN(size);
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ if (!svcxdr_encode_nfs_fh3(xdr, fhp))
+ return false;
+
+ return true;
}
-/*
- * Decode a file name and make sure that the path contains
- * no slashes or null bytes.
- */
-static __be32 *
-decode_filename(__be32 *p, char **namp, unsigned int *lenp)
+static bool
+svcxdr_encode_cookieverf3(struct xdr_stream *xdr, const __be32 *verf)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, NFS3_COOKIEVERFSIZE);
+ if (!p)
+ return false;
+ memcpy(p, verf, NFS3_COOKIEVERFSIZE);
+
+ return true;
+}
+
+static bool
+svcxdr_encode_writeverf3(struct xdr_stream *xdr, const __be32 *verf)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, NFS3_WRITEVERFSIZE);
+ if (!p)
+ return false;
+ memcpy(p, verf, NFS3_WRITEVERFSIZE);
+
+ return true;
+}
+
+static bool
+svcxdr_decode_filename3(struct xdr_stream *xdr, char **name, unsigned int *len)
{
- char *name;
- unsigned int i;
-
- if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
- for (i = 0, name = *namp; i < *lenp; i++, name++) {
- if (*name == '\0' || *name == '/')
- return NULL;
- }
+ u32 size, i;
+ __be32 *p;
+ char *c;
+
+ if (xdr_stream_decode_u32(xdr, &size) < 0)
+ return false;
+ if (size == 0 || size > NFS3_MAXNAMLEN)
+ return false;
+ p = xdr_inline_decode(xdr, size);
+ if (!p)
+ return false;
+
+ *len = size;
+ *name = (char *)p;
+ for (i = 0, c = *name; i < size; i++, c++) {
+ if (*c == '\0' || *c == '/')
+ return false;
}
- return p;
+ return true;
}
-static __be32 *
-decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns)
+static bool
+svcxdr_decode_diropargs3(struct xdr_stream *xdr, struct svc_fh *fhp,
+ char **name, unsigned int *len)
+{
+ return svcxdr_decode_nfs_fh3(xdr, fhp) &&
+ svcxdr_decode_filename3(xdr, name, len);
+}
+
+static bool
+svcxdr_decode_sattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ struct iattr *iap)
{
- u32 tmp;
+ u32 set_it;
iap->ia_valid = 0;
- if (*p++) {
+ if (xdr_stream_decode_bool(xdr, &set_it) < 0)
+ return false;
+ if (set_it) {
+ u32 mode;
+
+ if (xdr_stream_decode_u32(xdr, &mode) < 0)
+ return false;
iap->ia_valid |= ATTR_MODE;
- iap->ia_mode = ntohl(*p++);
+ iap->ia_mode = mode;
}
- if (*p++) {
- iap->ia_uid = make_kuid(userns, ntohl(*p++));
+ if (xdr_stream_decode_bool(xdr, &set_it) < 0)
+ return false;
+ if (set_it) {
+ u32 uid;
+
+ if (xdr_stream_decode_u32(xdr, &uid) < 0)
+ return false;
+ iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), uid);
if (uid_valid(iap->ia_uid))
iap->ia_valid |= ATTR_UID;
}
- if (*p++) {
- iap->ia_gid = make_kgid(userns, ntohl(*p++));
+ if (xdr_stream_decode_bool(xdr, &set_it) < 0)
+ return false;
+ if (set_it) {
+ u32 gid;
+
+ if (xdr_stream_decode_u32(xdr, &gid) < 0)
+ return false;
+ iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), gid);
if (gid_valid(iap->ia_gid))
iap->ia_valid |= ATTR_GID;
}
- if (*p++) {
- u64 newsize;
+ if (xdr_stream_decode_bool(xdr, &set_it) < 0)
+ return false;
+ if (set_it) {
+ u64 newsize;
+ if (xdr_stream_decode_u64(xdr, &newsize) < 0)
+ return false;
iap->ia_valid |= ATTR_SIZE;
- p = xdr_decode_hyper(p, &newsize);
- iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
+ iap->ia_size = newsize;
}
- if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
+ if (xdr_stream_decode_u32(xdr, &set_it) < 0)
+ return false;
+ switch (set_it) {
+ case DONT_CHANGE:
+ break;
+ case SET_TO_SERVER_TIME:
iap->ia_valid |= ATTR_ATIME;
- } else if (tmp == 2) { /* set to client time */
+ break;
+ case SET_TO_CLIENT_TIME:
+ if (!svcxdr_decode_nfstime3(xdr, &iap->ia_atime))
+ return false;
iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
- iap->ia_atime.tv_sec = ntohl(*p++);
- iap->ia_atime.tv_nsec = ntohl(*p++);
+ break;
+ default:
+ return false;
}
- if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
+ if (xdr_stream_decode_u32(xdr, &set_it) < 0)
+ return false;
+ switch (set_it) {
+ case DONT_CHANGE:
+ break;
+ case SET_TO_SERVER_TIME:
iap->ia_valid |= ATTR_MTIME;
- } else if (tmp == 2) { /* set to client time */
+ break;
+ case SET_TO_CLIENT_TIME:
+ if (!svcxdr_decode_nfstime3(xdr, &iap->ia_mtime))
+ return false;
iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
- iap->ia_mtime.tv_sec = ntohl(*p++);
- iap->ia_mtime.tv_nsec = ntohl(*p++);
+ break;
+ default:
+ return false;
}
- return p;
+
+ return true;
}
-static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_decode_sattrguard3(struct xdr_stream *xdr, struct nfsd3_sattrargs *args)
{
- u64 f;
- switch(fsid_source(fhp)) {
- default:
- case FSIDSOURCE_DEV:
- p = xdr_encode_hyper(p, (u64)huge_encode_dev
- (fhp->fh_dentry->d_sb->s_dev));
- break;
- case FSIDSOURCE_FSID:
- p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
- break;
- case FSIDSOURCE_UUID:
- f = ((u64*)fhp->fh_export->ex_uuid)[0];
- f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
- p = xdr_encode_hyper(p, f);
- break;
- }
- return p;
+ __be32 *p;
+ u32 check;
+
+ if (xdr_stream_decode_bool(xdr, &check) < 0)
+ return false;
+ if (check) {
+ p = xdr_inline_decode(xdr, XDR_UNIT * 2);
+ if (!p)
+ return false;
+ args->check_guard = 1;
+ args->guardtime = be32_to_cpup(p);
+ } else
+ args->check_guard = 0;
+
+ return true;
}
-static __be32 *
-encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
- struct kstat *stat)
+static bool
+svcxdr_decode_specdata3(struct xdr_stream *xdr, struct nfsd3_mknodargs *args)
{
- struct user_namespace *userns = nfsd_user_namespace(rqstp);
- *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
- *p++ = htonl((u32) (stat->mode & S_IALLUGO));
- *p++ = htonl((u32) stat->nlink);
- *p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
- *p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
- if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
- p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
- } else {
- p = xdr_encode_hyper(p, (u64) stat->size);
- }
- p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
- *p++ = htonl((u32) MAJOR(stat->rdev));
- *p++ = htonl((u32) MINOR(stat->rdev));
- p = encode_fsid(p, fhp);
- p = xdr_encode_hyper(p, stat->ino);
- p = encode_time3(p, &stat->atime);
- p = encode_time3(p, &stat->mtime);
- p = encode_time3(p, &stat->ctime);
+ __be32 *p;
- return p;
+ p = xdr_inline_decode(xdr, XDR_UNIT * 2);
+ if (!p)
+ return false;
+ args->major = be32_to_cpup(p++);
+ args->minor = be32_to_cpup(p);
+
+ return true;
}
-static __be32 *
-encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_decode_devicedata3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ struct nfsd3_mknodargs *args)
{
- /* Attributes to follow */
- *p++ = xdr_one;
- return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
+ return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
+ svcxdr_decode_specdata3(xdr, args);
}
-/*
- * Encode post-operation attributes.
- * The inode may be NULL if the call failed because of a stale file
- * handle. In this case, no attributes are returned.
- */
-static __be32 *
-encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_fattr3(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp, const struct kstat *stat)
{
- struct dentry *dentry = fhp->fh_dentry;
- if (dentry && d_really_is_positive(dentry)) {
- __be32 err;
- struct kstat stat;
-
- err = fh_getattr(fhp, &stat);
- if (!err) {
- *p++ = xdr_one; /* attributes follow */
- lease_get_mtime(d_inode(dentry), &stat.mtime);
- return encode_fattr3(rqstp, p, fhp, &stat);
- }
+ struct user_namespace *userns = nfsd_user_namespace(rqstp);
+ __be32 *p;
+ u64 fsid;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT * 21);
+ if (!p)
+ return false;
+
+ *p++ = cpu_to_be32(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
+ *p++ = cpu_to_be32((u32)(stat->mode & S_IALLUGO));
+ *p++ = cpu_to_be32((u32)stat->nlink);
+ *p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
+ *p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
+ if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN)
+ p = xdr_encode_hyper(p, (u64)NFS3_MAXPATHLEN);
+ else
+ p = xdr_encode_hyper(p, (u64)stat->size);
+
+ /* used */
+ p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
+
+ /* rdev */
+ *p++ = cpu_to_be32((u32)MAJOR(stat->rdev));
+ *p++ = cpu_to_be32((u32)MINOR(stat->rdev));
+
+ switch(fsid_source(fhp)) {
+ case FSIDSOURCE_FSID:
+ fsid = (u64)fhp->fh_export->ex_fsid;
+ break;
+ case FSIDSOURCE_UUID:
+ fsid = ((u64 *)fhp->fh_export->ex_uuid)[0];
+ fsid ^= ((u64 *)fhp->fh_export->ex_uuid)[1];
+ break;
+ default:
+ fsid = (u64)huge_encode_dev(fhp->fh_dentry->d_sb->s_dev);
}
- *p++ = xdr_zero;
- return p;
+ p = xdr_encode_hyper(p, fsid);
+
+ /* fileid */
+ p = xdr_encode_hyper(p, stat->ino);
+
+ p = encode_nfstime3(p, &stat->atime);
+ p = encode_nfstime3(p, &stat->mtime);
+ encode_nfstime3(p, &stat->ctime);
+
+ return true;
}
-/* Helper for NFSv3 ACLs */
-__be32 *
-nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_wcc_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
- return encode_post_op_attr(rqstp, p, fhp);
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT * 6);
+ if (!p)
+ return false;
+ p = xdr_encode_hyper(p, (u64)fhp->fh_pre_size);
+ p = encode_nfstime3(p, &fhp->fh_pre_mtime);
+ encode_nfstime3(p, &fhp->fh_pre_ctime);
+
+ return true;
}
-/*
- * Enocde weak cache consistency data
- */
-static __be32 *
-encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_pre_op_attr(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
- struct dentry *dentry = fhp->fh_dentry;
-
- if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) {
- if (fhp->fh_pre_saved) {
- *p++ = xdr_one;
- p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
- p = encode_time3(p, &fhp->fh_pre_mtime);
- p = encode_time3(p, &fhp->fh_pre_ctime);
- } else {
- *p++ = xdr_zero;
- }
- return encode_saved_post_attr(rqstp, p, fhp);
+ if (!fhp->fh_pre_saved) {
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ return true;
}
- /* no pre- or post-attrs */
- *p++ = xdr_zero;
- return encode_post_op_attr(rqstp, p, fhp);
+
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ return svcxdr_encode_wcc_attr(xdr, fhp);
}
-/*
- * Fill in the pre_op attr for the wcc data
+/**
+ * svcxdr_encode_post_op_attr - Encode NFSv3 post-op attributes
+ * @rqstp: Context of a completed RPC transaction
+ * @xdr: XDR stream
+ * @fhp: File handle to encode
+ *
+ * Return values:
+ * %false: Send buffer space was exhausted
+ * %true: Success
*/
-void fill_pre_wcc(struct svc_fh *fhp)
+bool
+svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp)
{
- struct inode *inode;
- struct kstat stat;
- __be32 err;
+ struct dentry *dentry = fhp->fh_dentry;
+ struct kstat stat;
- if (fhp->fh_pre_saved)
- return;
+ /*
+ * The inode may be NULL if the call failed because of a
+ * stale file handle. In this case, no attributes are
+ * returned.
+ */
+ if (fhp->fh_no_wcc || !dentry || !d_really_is_positive(dentry))
+ goto no_post_op_attrs;
+ if (fh_getattr(fhp, &stat) != nfs_ok)
+ goto no_post_op_attrs;
- inode = d_inode(fhp->fh_dentry);
- err = fh_getattr(fhp, &stat);
- if (err) {
- /* Grab the times from inode anyway */
- stat.mtime = inode->i_mtime;
- stat.ctime = inode->i_ctime;
- stat.size = inode->i_size;
- }
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ lease_get_mtime(d_inode(dentry), &stat.mtime);
+ if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &stat))
+ return false;
- fhp->fh_pre_mtime = stat.mtime;
- fhp->fh_pre_ctime = stat.ctime;
- fhp->fh_pre_size = stat.size;
- fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
- fhp->fh_pre_saved = true;
+ return true;
+
+no_post_op_attrs:
+ return xdr_stream_encode_item_absent(xdr) > 0;
}
/*
- * Fill in the post_op attr for the wcc data
+ * Encode weak cache consistency data
*/
-void fill_post_wcc(struct svc_fh *fhp)
+static bool
+svcxdr_encode_wcc_data(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp)
{
- __be32 err;
-
- if (fhp->fh_post_saved)
- printk("nfsd: inode locked twice during operation.\n");
-
- err = fh_getattr(fhp, &fhp->fh_post_attr);
- fhp->fh_post_change = nfsd4_change_attribute(&fhp->fh_post_attr,
- d_inode(fhp->fh_dentry));
- if (err) {
- fhp->fh_post_saved = false;
- /* Grab the ctime anyway - set_change_info might use it */
- fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime;
- } else
- fhp->fh_post_saved = true;
+ struct dentry *dentry = fhp->fh_dentry;
+
+ if (!dentry || !d_really_is_positive(dentry) || !fhp->fh_post_saved)
+ goto neither;
+
+ /* before */
+ if (!svcxdr_encode_pre_op_attr(xdr, fhp))
+ return false;
+
+ /* after */
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ if (!svcxdr_encode_fattr3(rqstp, xdr, fhp, &fhp->fh_post_attr))
+ return false;
+
+ return true;
+
+neither:
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, fhp))
+ return false;
+
+ return true;
}
/*
* XDR decode functions
*/
-int
-nfs3svc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
-{
- return 1;
-}
-int
-nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_fhandle *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_nfs_fh3(xdr, &args->fh);
}
-int
-nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_sattrargs *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- if ((args->check_guard = ntohl(*p++)) != 0) {
- struct timespec64 time;
- p = decode_time3(p, &time);
- args->guardtime = time.tv_sec;
- }
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_nfs_fh3(xdr, &args->fh) &&
+ svcxdr_decode_sattr3(rqstp, xdr, &args->attrs) &&
+ svcxdr_decode_sattrguard3(xdr, args);
}
-int
-nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len);
}
-int
-nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_accessargs *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->access = ntohl(*p++);
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->access) < 0)
+ return false;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readargs *args = rqstp->rq_argp;
- unsigned int len;
- int v;
- u32 max_blocksize = svc_max_payload(rqstp);
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = xdr_decode_hyper(p, &args->offset);
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
- args->count = ntohl(*p++);
- len = min(args->count, max_blocksize);
-
- /* set up the kvec */
- v=0;
- while (len > 0) {
- struct page *p = *(rqstp->rq_next_page++);
-
- rqstp->rq_vec[v].iov_base = page_address(p);
- rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
- len -= rqstp->rq_vec[v].iov_len;
- v++;
- }
- args->vlen = v;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_writeargs *args = rqstp->rq_argp;
- unsigned int len, hdr, dlen;
u32 max_blocksize = svc_max_payload(rqstp);
- struct kvec *head = rqstp->rq_arg.head;
- struct kvec *tail = rqstp->rq_arg.tail;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = xdr_decode_hyper(p, &args->offset);
-
- args->count = ntohl(*p++);
- args->stable = ntohl(*p++);
- len = args->len = ntohl(*p++);
- if ((void *)p > head->iov_base + head->iov_len)
- return 0;
- /*
- * The count must equal the amount of data passed.
- */
- if (args->count != args->len)
- return 0;
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->stable) < 0)
+ return false;
- /*
- * Check to make sure that we got the right number of
- * bytes.
- */
- hdr = (void*)p - head->iov_base;
- dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr;
- /*
- * Round the length of the data which was specified up to
- * the next multiple of XDR units and then compare that
- * against the length which was actually received.
- * Note that when RPCSEC/GSS (for example) is used, the
- * data buffer can be padded so dlen might be larger
- * than required. It must never be smaller.
- */
- if (dlen < XDR_QUADLEN(len)*4)
- return 0;
+ /* opaque data */
+ if (xdr_stream_decode_u32(xdr, &args->len) < 0)
+ return false;
+ /* request sanity */
+ if (args->count != args->len)
+ return false;
if (args->count > max_blocksize) {
args->count = max_blocksize;
- len = args->len = max_blocksize;
+ args->len = max_blocksize;
}
- args->first.iov_base = (void *)p;
- args->first.iov_len = head->iov_len - hdr;
- return 1;
+ return xdr_stream_subsegment(xdr, &args->payload, args->count);
}
-int
-nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_createargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
-
- switch (args->createmode = ntohl(*p++)) {
+ if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->createmode) < 0)
+ return false;
+ switch (args->createmode) {
case NFS3_CREATE_UNCHECKED:
case NFS3_CREATE_GUARDED:
- p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
- break;
+ return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
case NFS3_CREATE_EXCLUSIVE:
- args->verf = p;
- p += 2;
+ args->verf = xdr_inline_decode(xdr, NFS3_CREATEVERFSIZE);
+ if (!args->verf)
+ return false;
break;
default:
- return 0;
+ return false;
}
-
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_createargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->fh)) ||
- !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
- p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs3(xdr, &args->fh,
+ &args->name, &args->len) &&
+ svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
}
-int
-nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_symlinkargs *args = rqstp->rq_argp;
- char *base = (char *)p;
- size_t dlen;
-
- if (!(p = decode_fh(p, &args->ffh)) ||
- !(p = decode_filename(p, &args->fname, &args->flen)))
- return 0;
- p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- args->tlen = ntohl(*p++);
-
- args->first.iov_base = p;
- args->first.iov_len = rqstp->rq_arg.head[0].iov_len;
- args->first.iov_len -= (char *)p - base;
+ struct kvec *head = rqstp->rq_arg.head;
- dlen = args->first.iov_len + rqstp->rq_arg.page_len +
- rqstp->rq_arg.tail[0].iov_len;
- if (dlen < XDR_QUADLEN(args->tlen) << 2)
- return 0;
- return 1;
+ if (!svcxdr_decode_diropargs3(xdr, &args->ffh, &args->fname, &args->flen))
+ return false;
+ if (!svcxdr_decode_sattr3(rqstp, xdr, &args->attrs))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
+ return false;
+
+ /* symlink_data */
+ args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
+ args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
+ return args->first.iov_base != NULL;
}
-int
-nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_mknodargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
-
- args->ftype = ntohl(*p++);
-
- if (args->ftype == NF3BLK || args->ftype == NF3CHR
- || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
- p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
- args->major = ntohl(*p++);
- args->minor = ntohl(*p++);
+ if (!svcxdr_decode_diropargs3(xdr, &args->fh, &args->name, &args->len))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->ftype) < 0)
+ return false;
+ switch (args->ftype) {
+ case NF3CHR:
+ case NF3BLK:
+ return svcxdr_decode_devicedata3(rqstp, xdr, args);
+ case NF3SOCK:
+ case NF3FIFO:
+ return svcxdr_decode_sattr3(rqstp, xdr, &args->attrs);
+ case NF3REG:
+ case NF3DIR:
+ case NF3LNK:
+ /* Valid XDR but illegal file types */
+ break;
+ default:
+ return false;
}
- return xdr_argsize_check(rqstp, p);
+ return true;
}
-int
-nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_renameargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_filename(p, &args->fname, &args->flen))
- || !(p = decode_fh(p, &args->tfh))
- || !(p = decode_filename(p, &args->tname, &args->tlen)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
-}
-
-int
-nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nfsd3_readlinkargs *args = rqstp->rq_argp;
-
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->buffer = page_address(*(rqstp->rq_next_page++));
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs3(xdr, &args->ffh,
+ &args->fname, &args->flen) &&
+ svcxdr_decode_diropargs3(xdr, &args->tfh,
+ &args->tname, &args->tlen);
}
-int
-nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_linkargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_fh(p, &args->tfh))
- || !(p = decode_filename(p, &args->tname, &args->tlen)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_nfs_fh3(xdr, &args->ffh) &&
+ svcxdr_decode_diropargs3(xdr, &args->tfh,
+ &args->tname, &args->tlen);
}
-int
-nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirargs *args = rqstp->rq_argp;
- int len;
- u32 max_blocksize = svc_max_payload(rqstp);
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = xdr_decode_hyper(p, &args->cookie);
- args->verf = p; p += 2;
- args->dircount = ~0;
- args->count = ntohl(*p++);
- len = args->count = min_t(u32, args->count, max_blocksize);
-
- while (len > 0) {
- struct page *p = *(rqstp->rq_next_page++);
- if (!args->buffer)
- args->buffer = page_address(p);
- len -= PAGE_SIZE;
- }
-
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
+ return false;
+ args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
+ if (!args->verf)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
+
+ return true;
}
-int
-nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirargs *args = rqstp->rq_argp;
- int len;
- u32 max_blocksize = svc_max_payload(rqstp);
-
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = xdr_decode_hyper(p, &args->cookie);
- args->verf = p; p += 2;
- args->dircount = ntohl(*p++);
- args->count = ntohl(*p++);
-
- len = args->count = min(args->count, max_blocksize);
- while (len > 0) {
- struct page *p = *(rqstp->rq_next_page++);
- if (!args->buffer)
- args->buffer = page_address(p);
- len -= PAGE_SIZE;
- }
-
- return xdr_argsize_check(rqstp, p);
+ u32 dircount;
+
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u64(xdr, &args->cookie) < 0)
+ return false;
+ args->verf = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
+ if (!args->verf)
+ return false;
+ /* dircount is ignored */
+ if (xdr_stream_decode_u32(xdr, &dircount) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
+
+ return true;
}
-int
-nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_commitargs *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = xdr_decode_hyper(p, &args->offset);
- args->count = ntohl(*p++);
- return xdr_argsize_check(rqstp, p);
+ if (!svcxdr_decode_nfs_fh3(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u64(xdr, &args->offset) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
+
+ return true;
}
/*
* XDR encode functions
*/
-int
-nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_ressize_check(rqstp, p);
-}
-
/* GETATTR */
-int
-nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status == 0) {
- lease_get_mtime(d_inode(resp->fh.fh_dentry),
- &resp->stat.mtime);
- p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ lease_get_mtime(d_inode(resp->fh.fh_dentry), &resp->stat.mtime);
+ if (!svcxdr_encode_fattr3(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ break;
}
- return xdr_ressize_check(rqstp, p);
+
+ return true;
}
/* SETATTR, REMOVE, RMDIR */
-int
-nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_wcc_data(rqstp, p, &resp->fh);
- return xdr_ressize_check(rqstp, p);
+ return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+ svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh);
}
/* LOOKUP */
-int
-nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status == 0) {
- p = encode_fh(p, &resp->fh);
- p = encode_post_op_attr(rqstp, p, &resp->fh);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_nfs_fh3(xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->dirfh))
+ return false;
}
- p = encode_post_op_attr(rqstp, p, &resp->dirfh);
- return xdr_ressize_check(rqstp, p);
+
+ return true;
}
/* ACCESS */
-int
-nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_post_op_attr(rqstp, p, &resp->fh);
- if (resp->status == 0)
- *p++ = htonl(resp->access);
- return xdr_ressize_check(rqstp, p);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->access) < 0)
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
+
+ return true;
}
/* READLINK */
-int
-nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
+ struct kvec *head = rqstp->rq_res.head;
+
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->len) < 0)
+ return false;
+ xdr_write_pages(xdr, resp->pages, 0, resp->len);
+ if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
- *p++ = resp->status;
- p = encode_post_op_attr(rqstp, p, &resp->fh);
- if (resp->status == 0) {
- *p++ = htonl(resp->len);
- xdr_ressize_check(rqstp, p);
- rqstp->rq_res.page_len = resp->len;
- if (resp->len & 3) {
- /* need to pad the tail */
- rqstp->rq_res.tail[0].iov_base = p;
- *p = 0;
- rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
- }
- return 1;
- } else
- return xdr_ressize_check(rqstp, p);
+ return true;
}
/* READ */
-int
-nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readres *resp = rqstp->rq_resp;
+ struct kvec *head = rqstp->rq_res.head;
+
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->count) < 0)
+ return false;
+ if (xdr_stream_encode_bool(xdr, resp->eof) < 0)
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->count) < 0)
+ return false;
+ xdr_write_pages(xdr, resp->pages, rqstp->rq_res.page_base,
+ resp->count);
+ if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
- *p++ = resp->status;
- p = encode_post_op_attr(rqstp, p, &resp->fh);
- if (resp->status == 0) {
- *p++ = htonl(resp->count);
- *p++ = htonl(resp->eof);
- *p++ = htonl(resp->count); /* xdr opaque count */
- xdr_ressize_check(rqstp, p);
- /* now update rqstp->rq_res to reflect data as well */
- rqstp->rq_res.page_len = resp->count;
- if (resp->count & 3) {
- /* need to pad the tail */
- rqstp->rq_res.tail[0].iov_base = p;
- *p = 0;
- rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
- }
- return 1;
- } else
- return xdr_ressize_check(rqstp, p);
+ return true;
}
/* WRITE */
-int
-nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_writeres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_wcc_data(rqstp, p, &resp->fh);
- if (resp->status == 0) {
- *p++ = htonl(resp->count);
- *p++ = htonl(resp->committed);
- *p++ = resp->verf[0];
- *p++ = resp->verf[1];
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->count) < 0)
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->committed) < 0)
+ return false;
+ if (!svcxdr_encode_writeverf3(xdr, resp->verf))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+ return false;
}
- return xdr_ressize_check(rqstp, p);
+
+ return true;
}
/* CREATE, MKDIR, SYMLINK, MKNOD */
-int
-nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status == 0) {
- *p++ = xdr_one;
- p = encode_fh(p, &resp->fh);
- p = encode_post_op_attr(rqstp, p, &resp->fh);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_fh3(xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->dirfh))
+ return false;
}
- p = encode_wcc_data(rqstp, p, &resp->dirfh);
- return xdr_ressize_check(rqstp, p);
+
+ return true;
}
/* RENAME */
-int
-nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_renameres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_wcc_data(rqstp, p, &resp->ffh);
- p = encode_wcc_data(rqstp, p, &resp->tfh);
- return xdr_ressize_check(rqstp, p);
+ return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+ svcxdr_encode_wcc_data(rqstp, xdr, &resp->ffh) &&
+ svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
}
/* LINK */
-int
-nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_linkres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_post_op_attr(rqstp, p, &resp->fh);
- p = encode_wcc_data(rqstp, p, &resp->tfh);
- return xdr_ressize_check(rqstp, p);
+ return svcxdr_encode_nfsstat3(xdr, resp->status) &&
+ svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh) &&
+ svcxdr_encode_wcc_data(rqstp, xdr, &resp->tfh);
}
/* READDIR */
-int
-nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_readdirres *resp = rqstp->rq_resp;
+ struct xdr_buf *dirlist = &resp->dirlist;
+
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_cookieverf3(xdr, resp->verf))
+ return false;
+ xdr_write_pages(xdr, dirlist->pages, 0, dirlist->len);
+ /* no more entries */
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh))
+ return false;
+ }
- *p++ = resp->status;
- p = encode_post_op_attr(rqstp, p, &resp->fh);
-
- if (resp->status == 0) {
- /* stupid readdir cookie */
- memcpy(p, resp->verf, 8); p += 2;
- xdr_ressize_check(rqstp, p);
- if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
- return 1; /*No room for trailer */
- rqstp->rq_res.page_len = (resp->count) << 2;
-
- /* add the 'tail' to the end of the 'head' page - page 0. */
- rqstp->rq_res.tail[0].iov_base = p;
- *p++ = 0; /* no more entries */
- *p++ = htonl(resp->common.err == nfserr_eof);
- rqstp->rq_res.tail[0].iov_len = 2<<2;
- return 1;
- } else
- return xdr_ressize_check(rqstp, p);
-}
-
-static __be32 *
-encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
- int namlen, u64 ino)
-{
- *p++ = xdr_one; /* mark entry present */
- p = xdr_encode_hyper(p, ino); /* file id */
- p = xdr_encode_array(p, name, namlen);/* name length & name */
-
- cd->offset = p; /* remember pointer */
- p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
-
- return p;
+ return true;
}
static __be32
@@ -887,267 +1014,323 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
return rv;
}
-static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
-{
- struct svc_fh *fh = &cd->scratch;
- __be32 err;
-
- fh_init(fh, NFS3_FHSIZE);
- err = compose_entry_fh(cd, fh, name, namlen, ino);
- if (err) {
- *p++ = 0;
- *p++ = 0;
- goto out;
- }
- p = encode_post_op_attr(cd->rqstp, p, fh);
- *p++ = xdr_one; /* yes, a file handle follows */
- p = encode_fh(p, fh);
-out:
- fh_put(fh);
- return p;
-}
-
-/*
- * Encode a directory entry. This one works for both normal readdir
- * and readdirplus.
- * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
- * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
- *
- * The readdirplus baggage is 1+21 words for post_op_attr, plus the
- * file handle.
+/**
+ * nfs3svc_encode_cookie3 - Encode a directory offset cookie
+ * @resp: readdir result context
+ * @offset: offset cookie to encode
+ *
+ * The buffer space for the offset cookie has already been reserved
+ * by svcxdr_encode_entry3_common().
*/
-
-#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
-#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
-static int
-encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
- loff_t offset, u64 ino, unsigned int d_type, int plus)
+void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset)
{
- struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
- common);
- __be32 *p = cd->buffer;
- caddr_t curr_page_addr = NULL;
- struct page ** page;
- int slen; /* string (name) length */
- int elen; /* estimated entry length in words */
- int num_entry_words = 0; /* actual number of words */
-
- if (cd->offset) {
- u64 offset64 = offset;
-
- if (unlikely(cd->offset1)) {
- /* we ended up with offset on a page boundary */
- *cd->offset = htonl(offset64 >> 32);
- *cd->offset1 = htonl(offset64 & 0xffffffff);
- cd->offset1 = NULL;
- } else {
- xdr_encode_hyper(cd->offset, offset64);
- }
- cd->offset = NULL;
- }
-
- /*
- dprintk("encode_entry(%.*s @%ld%s)\n",
- namlen, name, (long) offset, plus? " plus" : "");
- */
-
- /* truncate filename if too long */
- namlen = min(namlen, NFS3_MAXNAMLEN);
+ __be64 cookie = cpu_to_be64(offset);
- slen = XDR_QUADLEN(namlen);
- elen = slen + NFS3_ENTRY_BAGGAGE
- + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
+ if (!resp->cookie_offset)
+ return;
+ write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
+ sizeof(cookie));
+ resp->cookie_offset = 0;
+}
- if (cd->buflen < elen) {
- cd->common.err = nfserr_toosmall;
- return -EINVAL;
- }
+static bool
+svcxdr_encode_entry3_common(struct nfsd3_readdirres *resp, const char *name,
+ int namlen, loff_t offset, u64 ino)
+{
+ struct xdr_buf *dirlist = &resp->dirlist;
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ /* fileid */
+ if (xdr_stream_encode_u64(xdr, ino) < 0)
+ return false;
+ /* name */
+ if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS3_MAXNAMLEN)) < 0)
+ return false;
+ /* cookie */
+ resp->cookie_offset = dirlist->len;
+ if (xdr_stream_encode_u64(xdr, OFFSET_MAX) < 0)
+ return false;
+
+ return true;
+}
- /* determine which page in rq_respages[] we are currently filling */
- for (page = cd->rqstp->rq_respages + 1;
- page < cd->rqstp->rq_next_page; page++) {
- curr_page_addr = page_address(*page);
+/**
+ * nfs3svc_encode_entry3 - encode one NFSv3 READDIR entry
+ * @data: directory context
+ * @name: name of the object to be encoded
+ * @namlen: length of that name, in bytes
+ * @offset: the offset of the previous entry
+ * @ino: the fileid of this entry
+ * @d_type: unused
+ *
+ * Return values:
+ * %0: Entry was successfully encoded.
+ * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
+ *
+ * On exit, the following fields are updated:
+ * - resp->xdr
+ * - resp->common.err
+ * - resp->cookie_offset
+ */
+int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct readdir_cd *ccd = data;
+ struct nfsd3_readdirres *resp = container_of(ccd,
+ struct nfsd3_readdirres,
+ common);
+ unsigned int starting_length = resp->dirlist.len;
- if (((caddr_t)cd->buffer >= curr_page_addr) &&
- ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
- break;
- }
+ /* The offset cookie for the previous entry */
+ nfs3svc_encode_cookie3(resp, offset);
- if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
- /* encode entry in current page */
+ if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
+ goto out_toosmall;
- p = encode_entry_baggage(cd, p, name, namlen, ino);
+ xdr_commit_encode(&resp->xdr);
+ resp->common.err = nfs_ok;
+ return 0;
- if (plus)
- p = encode_entryplus_baggage(cd, p, name, namlen, ino);
- num_entry_words = p - cd->buffer;
- } else if (*(page+1) != NULL) {
- /* temporarily encode entry into next page, then move back to
- * current and next page in rq_respages[] */
- __be32 *p1, *tmp;
- int len1, len2;
+out_toosmall:
+ resp->cookie_offset = 0;
+ resp->common.err = nfserr_toosmall;
+ resp->dirlist.len = starting_length;
+ return -EINVAL;
+}
- /* grab next page for temporary storage of entry */
- p1 = tmp = page_address(*(page+1));
+static bool
+svcxdr_encode_entry3_plus(struct nfsd3_readdirres *resp, const char *name,
+ int namlen, u64 ino)
+{
+ struct xdr_stream *xdr = &resp->xdr;
+ struct svc_fh *fhp = &resp->scratch;
+ bool result;
- p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
+ result = false;
+ fh_init(fhp, NFS3_FHSIZE);
+ if (compose_entry_fh(resp, fhp, name, namlen, ino) != nfs_ok)
+ goto out_noattrs;
- if (plus)
- p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
+ if (!svcxdr_encode_post_op_attr(resp->rqstp, xdr, fhp))
+ goto out;
+ if (!svcxdr_encode_post_op_fh3(xdr, fhp))
+ goto out;
+ result = true;
- /* determine entry word length and lengths to go in pages */
- num_entry_words = p1 - tmp;
- len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
- if ((num_entry_words << 2) < len1) {
- /* the actual number of words in the entry is less
- * than elen and can still fit in the current page
- */
- memmove(p, tmp, num_entry_words << 2);
- p += num_entry_words;
-
- /* update offset */
- cd->offset = cd->buffer + (cd->offset - tmp);
- } else {
- unsigned int offset_r = (cd->offset - tmp) << 2;
-
- /* update pointer to offset location.
- * This is a 64bit quantity, so we need to
- * deal with 3 cases:
- * - entirely in first page
- * - entirely in second page
- * - 4 bytes in each page
- */
- if (offset_r + 8 <= len1) {
- cd->offset = p + (cd->offset - tmp);
- } else if (offset_r >= len1) {
- cd->offset -= len1 >> 2;
- } else {
- /* sitting on the fence */
- BUG_ON(offset_r != len1 - 4);
- cd->offset = p + (cd->offset - tmp);
- cd->offset1 = tmp;
- }
-
- len2 = (num_entry_words << 2) - len1;
-
- /* move from temp page to current and next pages */
- memmove(p, tmp, len1);
- memmove(tmp, (caddr_t)tmp+len1, len2);
-
- p = tmp + (len2 >> 2);
- }
- }
- else {
- cd->common.err = nfserr_toosmall;
- return -EINVAL;
- }
+out:
+ fh_put(fhp);
+ return result;
+
+out_noattrs:
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ return true;
+}
- cd->buflen -= num_entry_words;
- cd->buffer = p;
- cd->common.err = nfs_ok;
+/**
+ * nfs3svc_encode_entryplus3 - encode one NFSv3 READDIRPLUS entry
+ * @data: directory context
+ * @name: name of the object to be encoded
+ * @namlen: length of that name, in bytes
+ * @offset: the offset of the previous entry
+ * @ino: the fileid of this entry
+ * @d_type: unused
+ *
+ * Return values:
+ * %0: Entry was successfully encoded.
+ * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
+ *
+ * On exit, the following fields are updated:
+ * - resp->xdr
+ * - resp->common.err
+ * - resp->cookie_offset
+ */
+int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct readdir_cd *ccd = data;
+ struct nfsd3_readdirres *resp = container_of(ccd,
+ struct nfsd3_readdirres,
+ common);
+ unsigned int starting_length = resp->dirlist.len;
+
+ /* The offset cookie for the previous entry */
+ nfs3svc_encode_cookie3(resp, offset);
+
+ if (!svcxdr_encode_entry3_common(resp, name, namlen, offset, ino))
+ goto out_toosmall;
+ if (!svcxdr_encode_entry3_plus(resp, name, namlen, ino))
+ goto out_toosmall;
+
+ xdr_commit_encode(&resp->xdr);
+ resp->common.err = nfs_ok;
return 0;
+out_toosmall:
+ resp->cookie_offset = 0;
+ resp->common.err = nfserr_toosmall;
+ resp->dirlist.len = starting_length;
+ return -EINVAL;
}
-int
-nfs3svc_encode_entry(void *cd, const char *name,
- int namlen, loff_t offset, u64 ino, unsigned int d_type)
+static bool
+svcxdr_encode_fsstat3resok(struct xdr_stream *xdr,
+ const struct nfsd3_fsstatres *resp)
{
- return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
-}
+ const struct kstatfs *s = &resp->stats;
+ u64 bs = s->f_bsize;
+ __be32 *p;
-int
-nfs3svc_encode_entry_plus(void *cd, const char *name,
- int namlen, loff_t offset, u64 ino,
- unsigned int d_type)
-{
- return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
+ p = xdr_reserve_space(xdr, XDR_UNIT * 13);
+ if (!p)
+ return false;
+ p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
+ p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
+ p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
+ p = xdr_encode_hyper(p, s->f_files); /* total inodes */
+ p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
+ p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
+ *p = cpu_to_be32(resp->invarsec); /* mean unchanged time */
+
+ return true;
}
/* FSSTAT */
-int
-nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_fsstatres *resp = rqstp->rq_resp;
- struct kstatfs *s = &resp->stats;
- u64 bs = s->f_bsize;
-
- *p++ = resp->status;
- *p++ = xdr_zero; /* no post_op_attr */
-
- if (resp->status == 0) {
- p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
- p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
- p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
- p = xdr_encode_hyper(p, s->f_files); /* total inodes */
- p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
- p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
- *p++ = htonl(resp->invarsec); /* mean unchanged time */
+
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
+ if (!svcxdr_encode_fsstat3resok(xdr, resp))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
}
- return xdr_ressize_check(rqstp, p);
+
+ return true;
+}
+
+static bool
+svcxdr_encode_fsinfo3resok(struct xdr_stream *xdr,
+ const struct nfsd3_fsinfores *resp)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT * 12);
+ if (!p)
+ return false;
+ *p++ = cpu_to_be32(resp->f_rtmax);
+ *p++ = cpu_to_be32(resp->f_rtpref);
+ *p++ = cpu_to_be32(resp->f_rtmult);
+ *p++ = cpu_to_be32(resp->f_wtmax);
+ *p++ = cpu_to_be32(resp->f_wtpref);
+ *p++ = cpu_to_be32(resp->f_wtmult);
+ *p++ = cpu_to_be32(resp->f_dtpref);
+ p = xdr_encode_hyper(p, resp->f_maxfilesize);
+ p = encode_nfstime3(p, &nfs3svc_time_delta);
+ *p = cpu_to_be32(resp->f_properties);
+
+ return true;
}
/* FSINFO */
-int
-nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
- *p++ = resp->status;
- *p++ = xdr_zero; /* no post_op_attr */
-
- if (resp->status == 0) {
- *p++ = htonl(resp->f_rtmax);
- *p++ = htonl(resp->f_rtpref);
- *p++ = htonl(resp->f_rtmult);
- *p++ = htonl(resp->f_wtmax);
- *p++ = htonl(resp->f_wtpref);
- *p++ = htonl(resp->f_wtmult);
- *p++ = htonl(resp->f_dtpref);
- p = xdr_encode_hyper(p, resp->f_maxfilesize);
- *p++ = xdr_one;
- *p++ = xdr_zero;
- *p++ = htonl(resp->f_properties);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
+ if (!svcxdr_encode_fsinfo3resok(xdr, resp))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
}
- return xdr_ressize_check(rqstp, p);
+ return true;
+}
+
+static bool
+svcxdr_encode_pathconf3resok(struct xdr_stream *xdr,
+ const struct nfsd3_pathconfres *resp)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT * 6);
+ if (!p)
+ return false;
+ *p++ = cpu_to_be32(resp->p_link_max);
+ *p++ = cpu_to_be32(resp->p_name_max);
+ p = xdr_encode_bool(p, resp->p_no_trunc);
+ p = xdr_encode_bool(p, resp->p_chown_restricted);
+ p = xdr_encode_bool(p, resp->p_case_insensitive);
+ xdr_encode_bool(p, resp->p_case_preserving);
+
+ return true;
}
/* PATHCONF */
-int
-nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_pathconfres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- *p++ = xdr_zero; /* no post_op_attr */
-
- if (resp->status == 0) {
- *p++ = htonl(resp->p_link_max);
- *p++ = htonl(resp->p_name_max);
- *p++ = htonl(resp->p_no_trunc);
- *p++ = htonl(resp->p_chown_restricted);
- *p++ = htonl(resp->p_case_insensitive);
- *p++ = htonl(resp->p_case_preserving);
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
+ if (!svcxdr_encode_pathconf3resok(xdr, resp))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_post_op_attr(rqstp, xdr, &nfs3svc_null_fh))
+ return false;
}
- return xdr_ressize_check(rqstp, p);
+ return true;
}
/* COMMIT */
-int
-nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd3_commitres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- p = encode_wcc_data(rqstp, p, &resp->fh);
- /* Write verifier */
- if (resp->status == 0) {
- *p++ = resp->verf[0];
- *p++ = resp->verf[1];
+ if (!svcxdr_encode_nfsstat3(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_writeverf3(xdr, resp->verf))
+ return false;
+ break;
+ default:
+ if (!svcxdr_encode_wcc_data(rqstp, xdr, &resp->fh))
+ return false;
}
- return xdr_ressize_check(rqstp, p);
+
+ return true;
}
/*
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index 71292a0d6f09..bb8e2f6d7d03 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -751,57 +751,26 @@ static int nfs4_acl_nfsv4_to_posix(struct nfs4_acl *acl,
return ret;
}
-__be32
-nfsd4_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct nfs4_acl *acl)
+__be32 nfsd4_acl_to_attr(enum nfs_ftype4 type, struct nfs4_acl *acl,
+ struct nfsd_attrs *attr)
{
- __be32 error;
int host_error;
- struct dentry *dentry;
- struct inode *inode;
- struct posix_acl *pacl = NULL, *dpacl = NULL;
unsigned int flags = 0;
- /* Get inode */
- error = fh_verify(rqstp, fhp, 0, NFSD_MAY_SATTR);
- if (error)
- return error;
-
- dentry = fhp->fh_dentry;
- inode = d_inode(dentry);
+ if (!acl)
+ return nfs_ok;
- if (S_ISDIR(inode->i_mode))
+ if (type == NF4DIR)
flags = NFS4_ACL_DIR;
- host_error = nfs4_acl_nfsv4_to_posix(acl, &pacl, &dpacl, flags);
+ host_error = nfs4_acl_nfsv4_to_posix(acl, &attr->na_pacl,
+ &attr->na_dpacl, flags);
if (host_error == -EINVAL)
return nfserr_attrnotsupp;
- if (host_error < 0)
- goto out_nfserr;
-
- fh_lock(fhp);
-
- host_error = set_posix_acl(inode, ACL_TYPE_ACCESS, pacl);
- if (host_error < 0)
- goto out_drop_lock;
-
- if (S_ISDIR(inode->i_mode)) {
- host_error = set_posix_acl(inode, ACL_TYPE_DEFAULT, dpacl);
- }
-
-out_drop_lock:
- fh_unlock(fhp);
-
- posix_acl_release(pacl);
- posix_acl_release(dpacl);
-out_nfserr:
- if (host_error == -EOPNOTSUPP)
- return nfserr_attrnotsupp;
else
return nfserrno(host_error);
}
-
static short
ace2type(struct nfs4_ace *ace)
{
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index f5b7ad0847f2..4eae2c5af2ed 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -76,6 +76,17 @@ static __be32 *xdr_encode_empty_array(__be32 *p)
* 1 Protocol"
*/
+static void encode_uint32(struct xdr_stream *xdr, u32 n)
+{
+ WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
+}
+
+static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap,
+ size_t len)
+{
+ WARN_ON_ONCE(xdr_stream_encode_uint32_array(xdr, bitmap, len) < 0);
+}
+
/*
* nfs_cb_opnum4
*
@@ -121,7 +132,7 @@ static void encode_nfs_fh4(struct xdr_stream *xdr, const struct knfsd_fh *fh)
BUG_ON(length > NFS4_FHSIZE);
p = xdr_reserve_space(xdr, 4 + length);
- xdr_encode_opaque(p, &fh->fh_base, length);
+ xdr_encode_opaque(p, &fh->fh_raw, length);
}
/*
@@ -328,6 +339,24 @@ static void encode_cb_recall4args(struct xdr_stream *xdr,
hdr->nops++;
}
+/*
+ * CB_RECALLANY4args
+ *
+ * struct CB_RECALLANY4args {
+ * uint32_t craa_objects_to_keep;
+ * bitmap4 craa_type_mask;
+ * };
+ */
+static void
+encode_cb_recallany4args(struct xdr_stream *xdr,
+ struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra)
+{
+ encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY);
+ encode_uint32(xdr, ra->ra_keep);
+ encode_bitmap4(xdr, ra->ra_bmval, ARRAY_SIZE(ra->ra_bmval));
+ hdr->nops++;
+}
+
/*
* CB_SEQUENCE4args
*
@@ -482,6 +511,26 @@ static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr,
encode_cb_nops(&hdr);
}
+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static void
+nfs4_xdr_enc_cb_recall_any(struct rpc_rqst *req,
+ struct xdr_stream *xdr, const void *data)
+{
+ const struct nfsd4_callback *cb = data;
+ struct nfsd4_cb_recall_any *ra;
+ struct nfs4_cb_compound_hdr hdr = {
+ .ident = cb->cb_clp->cl_cb_ident,
+ .minorversion = cb->cb_clp->cl_minorversion,
+ };
+
+ ra = container_of(cb, struct nfsd4_cb_recall_any, ra_cb);
+ encode_cb_compound4args(xdr, &hdr);
+ encode_cb_sequence4args(xdr, cb, &hdr);
+ encode_cb_recallany4args(xdr, &hdr, ra);
+ encode_cb_nops(&hdr);
+}
/*
* NFSv4.0 and NFSv4.1 XDR decode functions
@@ -520,6 +569,28 @@ static int nfs4_xdr_dec_cb_recall(struct rpc_rqst *rqstp,
return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status);
}
+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static int
+nfs4_xdr_dec_cb_recall_any(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *data)
+{
+ struct nfsd4_callback *cb = data;
+ struct nfs4_cb_compound_hdr hdr;
+ int status;
+
+ status = decode_cb_compound4res(xdr, &hdr);
+ if (unlikely(status))
+ return status;
+ status = decode_cb_sequence4res(xdr, cb);
+ if (unlikely(status || cb->cb_seq_status))
+ return status;
+ status = decode_cb_op_status(xdr, OP_CB_RECALL_ANY, &cb->cb_status);
+ return status;
+}
+
#ifdef CONFIG_NFSD_PNFS
/*
* CB_LAYOUTRECALL4args
@@ -679,7 +750,7 @@ static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp,
* case NFS4_OK:
* write_response4 coa_resok4;
* default:
- * length4 coa_bytes_copied;
+ * length4 coa_bytes_copied;
* };
* struct CB_OFFLOAD4args {
* nfs_fh4 coa_fh;
@@ -688,21 +759,22 @@ static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp,
* };
*/
static void encode_offload_info4(struct xdr_stream *xdr,
- __be32 nfserr,
- const struct nfsd4_copy *cp)
+ const struct nfsd4_cb_offload *cbo)
{
__be32 *p;
p = xdr_reserve_space(xdr, 4);
- *p++ = nfserr;
- if (!nfserr) {
+ *p = cbo->co_nfserr;
+ switch (cbo->co_nfserr) {
+ case nfs_ok:
p = xdr_reserve_space(xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
p = xdr_encode_empty_array(p);
- p = xdr_encode_hyper(p, cp->cp_res.wr_bytes_written);
- *p++ = cpu_to_be32(cp->cp_res.wr_stable_how);
- p = xdr_encode_opaque_fixed(p, cp->cp_res.wr_verifier.data,
+ p = xdr_encode_hyper(p, cbo->co_res.wr_bytes_written);
+ *p++ = cpu_to_be32(cbo->co_res.wr_stable_how);
+ p = xdr_encode_opaque_fixed(p, cbo->co_res.wr_verifier.data,
NFS4_VERIFIER_SIZE);
- } else {
+ break;
+ default:
p = xdr_reserve_space(xdr, 8);
/* We always return success if bytes were written */
p = xdr_encode_hyper(p, 0);
@@ -710,18 +782,16 @@ static void encode_offload_info4(struct xdr_stream *xdr,
}
static void encode_cb_offload4args(struct xdr_stream *xdr,
- __be32 nfserr,
- const struct knfsd_fh *fh,
- const struct nfsd4_copy *cp,
+ const struct nfsd4_cb_offload *cbo,
struct nfs4_cb_compound_hdr *hdr)
{
__be32 *p;
p = xdr_reserve_space(xdr, 4);
- *p++ = cpu_to_be32(OP_CB_OFFLOAD);
- encode_nfs_fh4(xdr, fh);
- encode_stateid4(xdr, &cp->cp_res.cb_stateid);
- encode_offload_info4(xdr, nfserr, cp);
+ *p = cpu_to_be32(OP_CB_OFFLOAD);
+ encode_nfs_fh4(xdr, &cbo->co_fh);
+ encode_stateid4(xdr, &cbo->co_res.cb_stateid);
+ encode_offload_info4(xdr, cbo);
hdr->nops++;
}
@@ -731,8 +801,8 @@ static void nfs4_xdr_enc_cb_offload(struct rpc_rqst *req,
const void *data)
{
const struct nfsd4_callback *cb = data;
- const struct nfsd4_copy *cp =
- container_of(cb, struct nfsd4_copy, cp_cb);
+ const struct nfsd4_cb_offload *cbo =
+ container_of(cb, struct nfsd4_cb_offload, co_cb);
struct nfs4_cb_compound_hdr hdr = {
.ident = 0,
.minorversion = cb->cb_clp->cl_minorversion,
@@ -740,7 +810,7 @@ static void nfs4_xdr_enc_cb_offload(struct rpc_rqst *req,
encode_cb_compound4args(xdr, &hdr);
encode_cb_sequence4args(xdr, cb, &hdr);
- encode_cb_offload4args(xdr, cp->nfserr, &cp->fh, cp, &hdr);
+ encode_cb_offload4args(xdr, cbo, &hdr);
encode_cb_nops(&hdr);
}
@@ -784,6 +854,7 @@ static const struct rpc_procinfo nfs4_cb_procedures[] = {
#endif
PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock),
PROC(CB_OFFLOAD, COMPOUND, cb_offload, cb_offload),
+ PROC(CB_RECALL_ANY, COMPOUND, cb_recall_any, cb_recall_any),
};
static unsigned int nfs4_cb_counts[ARRAY_SIZE(nfs4_cb_procedures)];
@@ -941,37 +1012,43 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
clp->cl_cb_conn.cb_xprt = conn->cb_xprt;
clp->cl_cb_client = client;
clp->cl_cb_cred = cred;
- trace_nfsd_cb_setup(clp);
+ rcu_read_lock();
+ trace_nfsd_cb_setup(clp, rpc_peeraddr2str(client, RPC_DISPLAY_NETID),
+ args.authflavor);
+ rcu_read_unlock();
return 0;
}
+static void nfsd4_mark_cb_state(struct nfs4_client *clp, int newstate)
+{
+ if (clp->cl_cb_state != newstate) {
+ clp->cl_cb_state = newstate;
+ trace_nfsd_cb_state(clp);
+ }
+}
+
static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason)
{
if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))
return;
- clp->cl_cb_state = NFSD4_CB_DOWN;
- trace_nfsd_cb_state(clp);
+ nfsd4_mark_cb_state(clp, NFSD4_CB_DOWN);
}
static void nfsd4_mark_cb_fault(struct nfs4_client *clp, int reason)
{
if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))
return;
- clp->cl_cb_state = NFSD4_CB_FAULT;
- trace_nfsd_cb_state(clp);
+ nfsd4_mark_cb_state(clp, NFSD4_CB_FAULT);
}
static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
{
struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null);
- trace_nfsd_cb_done(clp, task->tk_status);
if (task->tk_status)
nfsd4_mark_cb_down(clp, task->tk_status);
- else {
- clp->cl_cb_state = NFSD4_CB_UP;
- trace_nfsd_cb_state(clp);
- }
+ else
+ nfsd4_mark_cb_state(clp, NFSD4_CB_UP);
}
static void nfsd4_cb_probe_release(void *calldata)
@@ -995,8 +1072,8 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
*/
void nfsd4_probe_callback(struct nfs4_client *clp)
{
- clp->cl_cb_state = NFSD4_CB_UNKNOWN;
- trace_nfsd_cb_state(clp);
+ trace_nfsd_cb_probe(clp);
+ nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN);
set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
nfsd4_run_cb(&clp->cl_cb_null);
}
@@ -1009,11 +1086,10 @@ void nfsd4_probe_callback_sync(struct nfs4_client *clp)
void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn)
{
- clp->cl_cb_state = NFSD4_CB_UNKNOWN;
+ nfsd4_mark_cb_state(clp, NFSD4_CB_UNKNOWN);
spin_lock(&clp->cl_lock);
memcpy(&clp->cl_cb_conn, conn, sizeof(struct nfs4_cb_conn));
spin_unlock(&clp->cl_lock);
- trace_nfsd_cb_state(clp);
}
/*
@@ -1170,8 +1246,6 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
struct nfsd4_callback *cb = calldata;
struct nfs4_client *clp = cb->cb_clp;
- trace_nfsd_cb_done(clp, task->tk_status);
-
if (!nfsd4_cb_sequence_done(task, cb))
return;
@@ -1231,6 +1305,9 @@ void nfsd4_destroy_callback_queue(void)
/* must be called under the state lock */
void nfsd4_shutdown_callback(struct nfs4_client *clp)
{
+ if (clp->cl_cb_state != NFSD4_CB_UNKNOWN)
+ trace_nfsd_cb_shutdown(clp);
+
set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags);
/*
* Note this won't actually result in a null callback;
@@ -1276,7 +1353,6 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
* kill the old client:
*/
if (clp->cl_cb_client) {
- trace_nfsd_cb_shutdown(clp);
rpc_shutdown_client(clp->cl_cb_client);
clp->cl_cb_client = NULL;
put_cred(clp->cl_cb_cred);
@@ -1322,8 +1398,6 @@ nfsd4_run_cb_work(struct work_struct *work)
struct rpc_clnt *clnt;
int flags;
- trace_nfsd_cb_work(clp, cb->cb_msg.rpc_proc->p_name);
-
if (cb->cb_need_restart) {
cb->cb_need_restart = false;
} else {
@@ -1345,7 +1419,7 @@ nfsd4_run_cb_work(struct work_struct *work)
* Don't send probe messages for 4.1 or later.
*/
if (!cb->cb_ops && clp->cl_minorversion) {
- clp->cl_cb_state = NFSD4_CB_UP;
+ nfsd4_mark_cb_state(clp, NFSD4_CB_UP);
nfsd41_destroy_cb(cb);
return;
}
@@ -1371,11 +1445,21 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
cb->cb_holds_slot = false;
}
-void nfsd4_run_cb(struct nfsd4_callback *cb)
+/**
+ * nfsd4_run_cb - queue up a callback job to run
+ * @cb: callback to queue
+ *
+ * Kick off a callback to do its thing. Returns false if it was already
+ * on a queue, true otherwise.
+ */
+bool nfsd4_run_cb(struct nfsd4_callback *cb)
{
struct nfs4_client *clp = cb->cb_clp;
+ bool queued;
nfsd41_cb_inflight_begin(clp);
- if (!nfsd4_queue_cb(cb))
+ queued = nfsd4_queue_cb(cb);
+ if (!queued)
nfsd41_cb_inflight_end(clp);
+ return queued;
}
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index f92161ce1f97..5e9809aff37e 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -41,6 +41,7 @@
#include "idmap.h"
#include "nfsd.h"
#include "netns.h"
+#include "vfs.h"
/*
* Turn off idmapping when using AUTH_SYS.
@@ -82,8 +83,8 @@ ent_init(struct cache_head *cnew, struct cache_head *citm)
new->id = itm->id;
new->type = itm->type;
- strlcpy(new->name, itm->name, sizeof(new->name));
- strlcpy(new->authname, itm->authname, sizeof(new->authname));
+ strscpy(new->name, itm->name, sizeof(new->name));
+ strscpy(new->authname, itm->authname, sizeof(new->authname));
}
static void
@@ -548,7 +549,7 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
return nfserr_badowner;
memcpy(key.name, name, namelen);
key.name[namelen] = '\0';
- strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
+ strscpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
ret = idmap_lookup(rqstp, nametoid_lookup, &key, nn->nametoid_cache, &item);
if (ret == -ENOENT)
return nfserr_badowner;
@@ -584,7 +585,7 @@ static __be32 idmap_id_to_name(struct xdr_stream *xdr,
int ret;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
- strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
+ strscpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
ret = idmap_lookup(rqstp, idtoname_lookup, &key, nn->idtoname_cache, &item);
if (ret == -ENOENT)
return encode_ascii_id(xdr, id);
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 2673019d30ec..e4e23b2a3e65 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -421,7 +421,7 @@ nfsd4_insert_layout(struct nfsd4_layoutget *lgp, struct nfs4_layout_stateid *ls)
new = kmem_cache_alloc(nfs4_layout_cache, GFP_KERNEL);
if (!new)
return nfserr_jukebox;
- memcpy(&new->lo_seg, seg, sizeof(lp->lo_seg));
+ memcpy(&new->lo_seg, seg, sizeof(new->lo_seg));
new->lo_state = ls;
spin_lock(&fp->fi_lock);
@@ -657,7 +657,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
ktime_t now, cutoff;
const struct nfsd4_layout_ops *ops;
-
+ trace_nfsd_cb_layout_done(&ls->ls_stid.sc_stateid, task);
switch (task->tk_status) {
case 0:
case -NFS4ERR_DELAY:
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index e84996c3867c..2c0de247083a 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -37,6 +37,9 @@
#include <linux/falloc.h>
#include <linux/slab.h>
#include <linux/kthread.h>
+#include <linux/namei.h>
+#include <linux/freezer.h>
+
#include <linux/sunrpc/addr.h>
#include <linux/nfs_ssc.h>
@@ -50,34 +53,16 @@
#include "pnfs.h"
#include "trace.h"
-#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
-#include <linux/security.h>
-
-static inline void
-nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
-{
- struct inode *inode = d_inode(resfh->fh_dentry);
- int status;
-
- inode_lock(inode);
- status = security_inode_setsecctx(resfh->fh_dentry,
- label->data, label->len);
- inode_unlock(inode);
-
- if (status)
- /*
- * XXX: We should really fail the whole open, but we may
- * already have created a new file, so it may be too
- * late. For now this seems the least of evils:
- */
- bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+static bool inter_copy_offload_enable;
+module_param(inter_copy_offload_enable, bool, 0644);
+MODULE_PARM_DESC(inter_copy_offload_enable,
+ "Enable inter server to server copy offload. Default: false");
- return;
-}
-#else
-static inline void
-nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
-{ }
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+static int nfsd4_ssc_umount_timeout = 900000; /* default to 15 mins */
+module_param(nfsd4_ssc_umount_timeout, int, 0644);
+MODULE_PARM_DESC(nfsd4_ssc_umount_timeout,
+ "idle msecs before unmount export from source server");
#endif
#define NFSDDBG_FACILITY NFSDDBG_PROC
@@ -144,26 +129,6 @@ is_create_with_attrs(struct nfsd4_open *open)
|| open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
}
-/*
- * if error occurs when setting the acl, just clear the acl bit
- * in the returned attr bitmap.
- */
-static void
-do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct nfs4_acl *acl, u32 *bmval)
-{
- __be32 status;
-
- status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
- if (status)
- /*
- * We should probably fail the whole open at this point,
- * but we've already created the file, so it's too late;
- * So this seems the least of evils:
- */
- bmval[0] &= ~FATTR4_WORD0_ACL;
-}
-
static inline void
fh_dup2(struct svc_fh *dst, struct svc_fh *src)
{
@@ -177,7 +142,6 @@ fh_dup2(struct svc_fh *dst, struct svc_fh *src)
static __be32
do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
{
- __be32 status;
if (open->op_truncate &&
!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
@@ -192,9 +156,7 @@ do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs
if (open->op_share_deny & NFS4_SHARE_DENY_READ)
accmode |= NFSD_MAY_WRITE;
- status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
-
- return status;
+ return fh_verify(rqstp, current_fh, S_IFREG, accmode);
}
static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
@@ -223,6 +185,202 @@ static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate
&resfh->fh_handle);
}
+static inline bool nfsd4_create_is_exclusive(int createmode)
+{
+ return createmode == NFS4_CREATE_EXCLUSIVE ||
+ createmode == NFS4_CREATE_EXCLUSIVE4_1;
+}
+
+static __be32
+nfsd4_vfs_create(struct svc_fh *fhp, struct dentry *child,
+ struct nfsd4_open *open)
+{
+ struct file *filp;
+ struct path path;
+ int oflags;
+
+ oflags = O_CREAT | O_LARGEFILE;
+ switch (open->op_share_access & NFS4_SHARE_ACCESS_BOTH) {
+ case NFS4_SHARE_ACCESS_WRITE:
+ oflags |= O_WRONLY;
+ break;
+ case NFS4_SHARE_ACCESS_BOTH:
+ oflags |= O_RDWR;
+ break;
+ default:
+ oflags |= O_RDONLY;
+ }
+
+ path.mnt = fhp->fh_export->ex_path.mnt;
+ path.dentry = child;
+ filp = dentry_create(&path, oflags, open->op_iattr.ia_mode,
+ current_cred());
+ if (IS_ERR(filp))
+ return nfserrno(PTR_ERR(filp));
+
+ open->op_filp = filp;
+ return nfs_ok;
+}
+
+/*
+ * Implement NFSv4's unchecked, guarded, and exclusive create
+ * semantics for regular files. Open state for this new file is
+ * subsequently fabricated in nfsd4_process_open2().
+ *
+ * Upon return, caller must release @fhp and @resfhp.
+ */
+static __be32
+nfsd4_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct svc_fh *resfhp, struct nfsd4_open *open)
+{
+ struct iattr *iap = &open->op_iattr;
+ struct nfsd_attrs attrs = {
+ .na_iattr = iap,
+ .na_seclabel = &open->op_label,
+ };
+ struct dentry *parent, *child;
+ __u32 v_mtime, v_atime;
+ struct inode *inode;
+ __be32 status;
+ int host_err;
+
+ if (isdotent(open->op_fname, open->op_fnamelen))
+ return nfserr_exist;
+ if (!(iap->ia_valid & ATTR_MODE))
+ iap->ia_mode = 0;
+
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
+ if (status != nfs_ok)
+ return status;
+ parent = fhp->fh_dentry;
+ inode = d_inode(parent);
+
+ host_err = fh_want_write(fhp);
+ if (host_err)
+ return nfserrno(host_err);
+
+ if (is_create_with_attrs(open))
+ nfsd4_acl_to_attr(NF4REG, open->op_acl, &attrs);
+
+ inode_lock_nested(inode, I_MUTEX_PARENT);
+
+ child = lookup_one_len(open->op_fname, parent, open->op_fnamelen);
+ if (IS_ERR(child)) {
+ status = nfserrno(PTR_ERR(child));
+ goto out;
+ }
+
+ if (d_really_is_negative(child)) {
+ status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
+ if (status != nfs_ok)
+ goto out;
+ }
+
+ status = fh_compose(resfhp, fhp->fh_export, child, fhp);
+ if (status != nfs_ok)
+ goto out;
+
+ v_mtime = 0;
+ v_atime = 0;
+ if (nfsd4_create_is_exclusive(open->op_createmode)) {
+ u32 *verifier = (u32 *)open->op_verf.data;
+
+ /*
+ * Solaris 7 gets confused (bugid 4218508) if these have
+ * the high bit set, as do xfs filesystems without the
+ * "bigtime" feature. So just clear the high bits. If this
+ * is ever changed to use different attrs for storing the
+ * verifier, then do_open_lookup() will also need to be
+ * fixed accordingly.
+ */
+ v_mtime = verifier[0] & 0x7fffffff;
+ v_atime = verifier[1] & 0x7fffffff;
+ }
+
+ if (d_really_is_positive(child)) {
+ status = nfs_ok;
+
+ /* NFSv4 protocol requires change attributes even though
+ * no change happened.
+ */
+ fh_fill_both_attrs(fhp);
+
+ switch (open->op_createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ if (!d_is_reg(child))
+ break;
+
+ /*
+ * In NFSv4, we don't want to truncate the file
+ * now. This would be wrong if the OPEN fails for
+ * some other reason. Furthermore, if the size is
+ * nonzero, we should ignore it according to spec!
+ */
+ open->op_truncate = (iap->ia_valid & ATTR_SIZE) &&
+ !iap->ia_size;
+ break;
+ case NFS4_CREATE_GUARDED:
+ status = nfserr_exist;
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
+ d_inode(child)->i_atime.tv_sec == v_atime &&
+ d_inode(child)->i_size == 0) {
+ open->op_created = true;
+ break; /* subtle */
+ }
+ status = nfserr_exist;
+ break;
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
+ d_inode(child)->i_atime.tv_sec == v_atime &&
+ d_inode(child)->i_size == 0) {
+ open->op_created = true;
+ goto set_attr; /* subtle */
+ }
+ status = nfserr_exist;
+ }
+ goto out;
+ }
+
+ if (!IS_POSIXACL(inode))
+ iap->ia_mode &= ~current_umask();
+
+ fh_fill_pre_attrs(fhp);
+ status = nfsd4_vfs_create(fhp, child, open);
+ if (status != nfs_ok)
+ goto out;
+ open->op_created = true;
+ fh_fill_post_attrs(fhp);
+
+ /* A newly created file already has a file size of zero. */
+ if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
+ iap->ia_valid &= ~ATTR_SIZE;
+ if (nfsd4_create_is_exclusive(open->op_createmode)) {
+ iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
+ ATTR_MTIME_SET|ATTR_ATIME_SET;
+ iap->ia_mtime.tv_sec = v_mtime;
+ iap->ia_atime.tv_sec = v_atime;
+ iap->ia_mtime.tv_nsec = 0;
+ iap->ia_atime.tv_nsec = 0;
+ }
+
+set_attr:
+ status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
+
+ if (attrs.na_labelerr)
+ open->op_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ if (attrs.na_aclerr)
+ open->op_bmval[0] &= ~FATTR4_WORD0_ACL;
+out:
+ inode_unlock(inode);
+ nfsd_attrs_free(&attrs);
+ if (child && !IS_ERR(child))
+ dput(child);
+ fh_drop_write(fhp);
+ return status;
+}
+
static __be32
do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
{
@@ -252,47 +410,33 @@ do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stru
* yes | yes | GUARDED4 | GUARDED4
*/
- /*
- * Note: create modes (UNCHECKED,GUARDED...) are the same
- * in NFSv4 as in v3 except EXCLUSIVE4_1.
- */
current->fs->umask = open->op_umask;
- status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
- open->op_fname.len, &open->op_iattr,
- *resfh, open->op_createmode,
- (u32 *)open->op_verf.data,
- &open->op_truncate, &open->op_created);
+ status = nfsd4_create_file(rqstp, current_fh, *resfh, open);
current->fs->umask = 0;
- if (!status && open->op_label.len)
- nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
-
/*
* Following rfc 3530 14.2.16, and rfc 5661 18.16.4
* use the returned bitmask to indicate which attributes
* we used to store the verifier:
*/
- if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
+ if (nfsd4_create_is_exclusive(open->op_createmode) && status == 0)
open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
FATTR4_WORD1_TIME_MODIFY);
- } else
- /*
- * Note this may exit with the parent still locked.
- * We will hold the lock until nfsd4_open's final
- * lookup, to prevent renames or unlinks until we've had
- * a chance to an acquire a delegation if appropriate.
- */
+ } else {
status = nfsd_lookup(rqstp, current_fh,
- open->op_fname.data, open->op_fname.len, *resfh);
+ open->op_fname, open->op_fnamelen, *resfh);
+ if (!status)
+ /* NFSv4 protocol requires change attributes even though
+ * no change happened.
+ */
+ fh_fill_both_attrs(current_fh);
+ }
if (status)
goto out;
status = nfsd_check_obj_isreg(*resfh);
if (status)
goto out;
- if (is_create_with_attrs(open) && open->op_acl != NULL)
- do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
-
nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
accmode = NFSD_MAY_NOP;
if (open->op_created ||
@@ -308,7 +452,6 @@ static __be32
do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
{
struct svc_fh *current_fh = &cstate->current_fh;
- __be32 status;
int accmode = 0;
/* We don't know the target directory, and therefore can not
@@ -333,9 +476,7 @@ do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, str
if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
accmode = NFSD_MAY_OWNER_OVERRIDE;
- status = do_open_permission(rqstp, current_fh, open, accmode);
-
- return status;
+ return do_open_permission(rqstp, current_fh, open, accmode);
}
static void
@@ -360,9 +501,12 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
bool reclaim = false;
dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
- (int)open->op_fname.len, open->op_fname.data,
+ (int)open->op_fnamelen, open->op_fname,
open->op_openowner);
+ open->op_filp = NULL;
+ open->op_rqstp = rqstp;
+
/* This check required by spec. */
if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
return nfserr_inval;
@@ -373,8 +517,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
* Before RECLAIM_COMPLETE done, server should deny new lock
*/
if (nfsd4_has_session(cstate) &&
- !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
- &cstate->session->se_client->cl_flags) &&
+ !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
return nfserr_grace;
@@ -416,51 +559,46 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
switch (open->op_claim_type) {
- case NFS4_OPEN_CLAIM_DELEGATE_CUR:
- case NFS4_OPEN_CLAIM_NULL:
- status = do_open_lookup(rqstp, cstate, open, &resfh);
- if (status)
- goto out;
- break;
- case NFS4_OPEN_CLAIM_PREVIOUS:
- status = nfs4_check_open_reclaim(&open->op_clientid,
- cstate, nn);
- if (status)
- goto out;
- open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
- reclaim = true;
- fallthrough;
- case NFS4_OPEN_CLAIM_FH:
- case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
- status = do_open_fhandle(rqstp, cstate, open);
- if (status)
- goto out;
- resfh = &cstate->current_fh;
- break;
- case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
- case NFS4_OPEN_CLAIM_DELEGATE_PREV:
- dprintk("NFSD: unsupported OPEN claim type %d\n",
- open->op_claim_type);
- status = nfserr_notsupp;
+ case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+ case NFS4_OPEN_CLAIM_NULL:
+ status = do_open_lookup(rqstp, cstate, open, &resfh);
+ if (status)
+ goto out;
+ break;
+ case NFS4_OPEN_CLAIM_PREVIOUS:
+ status = nfs4_check_open_reclaim(cstate->clp);
+ if (status)
goto out;
- default:
- dprintk("NFSD: Invalid OPEN claim type %d\n",
- open->op_claim_type);
- status = nfserr_inval;
+ open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
+ reclaim = true;
+ fallthrough;
+ case NFS4_OPEN_CLAIM_FH:
+ case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
+ status = do_open_fhandle(rqstp, cstate, open);
+ if (status)
goto out;
+ resfh = &cstate->current_fh;
+ break;
+ case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
+ case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+ status = nfserr_notsupp;
+ goto out;
+ default:
+ status = nfserr_inval;
+ goto out;
}
- /*
- * nfsd4_process_open2() does the actual opening of the file. If
- * successful, it (1) truncates the file if open->op_truncate was
- * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
- */
+
status = nfsd4_process_open2(rqstp, resfh, open);
- WARN(status && open->op_created,
- "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
- be32_to_cpu(status));
+ if (status && open->op_created)
+ pr_warn("nfsd4_process_open2 failed to open newly-created file: status=%u\n",
+ be32_to_cpu(status));
if (reclaim && !status)
nn->somebody_reclaimed = true;
out:
+ if (open->op_filp) {
+ fput(open->op_filp);
+ open->op_filp = NULL;
+ }
if (resfh && resfh != &cstate->current_fh) {
fh_dup2(&cstate->current_fh, resfh);
fh_put(resfh);
@@ -509,7 +647,7 @@ nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
fh_put(&cstate->current_fh);
cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
- memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
+ memcpy(&cstate->current_fh.fh_handle.fh_raw, putfh->pf_fhval,
putfh->pf_fhlen);
ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
@@ -525,11 +663,9 @@ static __be32
nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
- __be32 status;
-
fh_put(&cstate->current_fh);
- status = exp_pseudoroot(rqstp, &cstate->current_fh);
- return status;
+
+ return exp_pseudoroot(rqstp, &cstate->current_fh);
}
static __be32
@@ -588,7 +724,7 @@ static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
- nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
+ nfsd_copy_write_verifier(verf, net_generic(net, nfsd_net_id));
}
static __be32
@@ -596,10 +732,19 @@ nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_commit *commit = &u->commit;
+ struct nfsd_file *nf;
+ __be32 status;
+
+ status = nfsd_file_acquire(rqstp, &cstate->current_fh, NFSD_MAY_WRITE |
+ NFSD_MAY_NOT_BREAK_LEASE, &nf);
+ if (status != nfs_ok)
+ return status;
- return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
+ status = nfsd_commit(rqstp, &cstate->current_fh, nf, commit->co_offset,
commit->co_count,
(__be32 *)commit->co_verf.data);
+ nfsd_file_put(nf);
+ return status;
}
static __be32
@@ -607,6 +752,10 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_create *create = &u->create;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &create->cr_iattr,
+ .na_seclabel = &create->cr_label,
+ };
struct svc_fh resfh;
__be32 status;
dev_t rdev;
@@ -622,12 +771,13 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
return status;
+ status = nfsd4_acl_to_attr(create->cr_type, create->cr_acl, &attrs);
current->fs->umask = create->cr_umask;
switch (create->cr_type) {
case NF4LNK:
status = nfsd_symlink(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- create->cr_data, &resfh);
+ create->cr_data, &attrs, &resfh);
break;
case NF4BLK:
@@ -638,7 +788,7 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out_umask;
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- &create->cr_iattr, S_IFBLK, rdev, &resfh);
+ &attrs, S_IFBLK, rdev, &resfh);
break;
case NF4CHR:
@@ -649,26 +799,26 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out_umask;
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- &create->cr_iattr,S_IFCHR, rdev, &resfh);
+ &attrs, S_IFCHR, rdev, &resfh);
break;
case NF4SOCK:
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- &create->cr_iattr, S_IFSOCK, 0, &resfh);
+ &attrs, S_IFSOCK, 0, &resfh);
break;
case NF4FIFO:
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- &create->cr_iattr, S_IFIFO, 0, &resfh);
+ &attrs, S_IFIFO, 0, &resfh);
break;
case NF4DIR:
create->cr_iattr.ia_valid &= ~ATTR_SIZE;
status = nfsd_create(rqstp, &cstate->current_fh,
create->cr_name, create->cr_namelen,
- &create->cr_iattr, S_IFDIR, 0, &resfh);
+ &attrs, S_IFDIR, 0, &resfh);
break;
default:
@@ -678,20 +828,17 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
goto out;
- if (create->cr_label.len)
- nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
-
- if (create->cr_acl != NULL)
- do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
- create->cr_bmval);
-
- fh_unlock(&cstate->current_fh);
+ if (attrs.na_labelerr)
+ create->cr_bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+ if (attrs.na_aclerr)
+ create->cr_bmval[0] &= ~FATTR4_WORD0_ACL;
set_change_info(&create->cr_cinfo, &cstate->current_fh);
fh_dup2(&cstate->current_fh, &resfh);
out:
fh_put(&resfh);
out_umask:
current->fs->umask = 0;
+ nfsd_attrs_free(&attrs);
return status;
}
@@ -772,12 +919,16 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
read->rd_nf = NULL;
- if (read->rd_offset >= OFFSET_MAX)
- return nfserr_inval;
trace_nfsd_read_start(rqstp, &cstate->current_fh,
read->rd_offset, read->rd_length);
+ read->rd_length = min_t(u32, read->rd_length, svc_max_payload(rqstp));
+ if (read->rd_offset > (u64)OFFSET_MAX)
+ read->rd_offset = (u64)OFFSET_MAX;
+ if (read->rd_offset + read->rd_length > (u64)OFFSET_MAX)
+ read->rd_length = (u64)OFFSET_MAX - read->rd_offset;
+
/*
* If we do a zero copy read, then a client will see read data
* that reflects the state of the file *after* performing the
@@ -793,12 +944,7 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&read->rd_stateid, RD_STATE,
&read->rd_nf, NULL);
- if (status) {
- dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
- goto out;
- }
- status = nfs_ok;
-out:
+
read->rd_rqstp = rqstp;
read->rd_fhp = &cstate->current_fh;
return status;
@@ -860,10 +1006,8 @@ nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return nfserr_grace;
status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
remove->rm_name, remove->rm_namelen);
- if (!status) {
- fh_unlock(&cstate->current_fh);
+ if (!status)
set_change_info(&remove->rm_cinfo, &cstate->current_fh);
- }
return status;
}
@@ -903,7 +1047,6 @@ nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
&exp, &dentry);
if (err)
return err;
- fh_unlock(&cstate->current_fh);
if (d_really_is_negative(dentry)) {
exp_put(exp);
err = nfserr_noent;
@@ -958,17 +1101,21 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_setattr *setattr = &u->setattr;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &setattr->sa_iattr,
+ .na_seclabel = &setattr->sa_label,
+ };
+ struct inode *inode;
__be32 status = nfs_ok;
+ bool save_no_wcc;
int err;
if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
status = nfs4_preprocess_stateid_op(rqstp, cstate,
&cstate->current_fh, &setattr->sa_stateid,
WR_STATE, NULL, NULL);
- if (status) {
- dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
+ if (status)
return status;
- }
}
err = fh_want_write(&cstate->current_fh);
if (err)
@@ -980,19 +1127,23 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
goto out;
- if (setattr->sa_acl != NULL)
- status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
- setattr->sa_acl);
- if (status)
- goto out;
- if (setattr->sa_label.len)
- status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
- &setattr->sa_label);
+ inode = cstate->current_fh.fh_dentry->d_inode;
+ status = nfsd4_acl_to_attr(S_ISDIR(inode->i_mode) ? NF4DIR : NF4REG,
+ setattr->sa_acl, &attrs);
+
if (status)
goto out;
- status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
+ save_no_wcc = cstate->current_fh.fh_no_wcc;
+ cstate->current_fh.fh_no_wcc = true;
+ status = nfsd_setattr(rqstp, &cstate->current_fh, &attrs,
0, (time64_t)0);
+ cstate->current_fh.fh_no_wcc = save_no_wcc;
+ if (!status)
+ status = nfserrno(attrs.na_labelerr);
+ if (!status)
+ status = nfserrno(attrs.na_aclerr);
out:
+ nfsd_attrs_free(&attrs);
fh_drop_write(&cstate->current_fh);
return status;
}
@@ -1017,15 +1168,12 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
write->wr_offset, cnt);
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
stateid, WR_STATE, &nf, NULL);
- if (status) {
- dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
+ if (status)
return status;
- }
write->wr_how_written = write->wr_stable_how;
- nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
- &write->wr_head, write->wr_buflen);
+ nvecs = svc_fill_write_vector(rqstp, &write->wr_payload);
WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
@@ -1052,17 +1200,13 @@ nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
src_stateid, RD_STATE, src, NULL);
- if (status) {
- dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
+ if (status)
goto out;
- }
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
dst_stateid, WR_STATE, dst, NULL);
- if (status) {
- dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
+ if (status)
goto out_put_src;
- }
/* fix up for NFS-specific error code */
if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
@@ -1095,7 +1239,7 @@ nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
goto out;
- status = nfsd4_clone_file_range(src, clone->cl_src_pos,
+ status = nfsd4_clone_file_range(rqstp, src, clone->cl_src_pos,
dst, clone->cl_dst_pos, clone->cl_count,
EX_ISSYNC(cstate->current_fh.fh_export));
@@ -1105,30 +1249,17 @@ nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status;
}
-void nfs4_put_copy(struct nfsd4_copy *copy)
+static void nfs4_put_copy(struct nfsd4_copy *copy)
{
if (!refcount_dec_and_test(©->refcount))
return;
+ kfree(copy->cp_src);
kfree(copy);
}
-static bool
-check_and_set_stop_copy(struct nfsd4_copy *copy)
-{
- bool value;
-
- spin_lock(©->cp_clp->async_lock);
- value = copy->stopped;
- if (!copy->stopped)
- copy->stopped = true;
- spin_unlock(©->cp_clp->async_lock);
- return value;
-}
-
static void nfsd4_stop_copy(struct nfsd4_copy *copy)
{
- /* only 1 thread should stop the copy */
- if (!check_and_set_stop_copy(copy))
+ if (!test_and_set_bit(NFSD4_COPY_F_STOPPED, ©->cp_flags))
kthread_stop(copy->copy_task);
nfs4_put_copy(copy);
}
@@ -1165,12 +1296,88 @@ extern void nfs_sb_deactive(struct super_block *sb);
#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
+/*
+ * setup a work entry in the ssc delayed unmount list.
+ */
+static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr,
+ struct nfsd4_ssc_umount_item **nsui)
+{
+ struct nfsd4_ssc_umount_item *ni = NULL;
+ struct nfsd4_ssc_umount_item *work = NULL;
+ struct nfsd4_ssc_umount_item *tmp;
+ DEFINE_WAIT(wait);
+ __be32 status = 0;
+
+ *nsui = NULL;
+ work = kzalloc(sizeof(*work), GFP_KERNEL);
+try_again:
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
+ if (strncmp(ni->nsui_ipaddr, ipaddr, sizeof(ni->nsui_ipaddr)))
+ continue;
+ /* found a match */
+ if (ni->nsui_busy) {
+ /* wait - and try again */
+ prepare_to_wait(&nn->nfsd_ssc_waitq, &wait, TASK_IDLE);
+ spin_unlock(&nn->nfsd_ssc_lock);
+
+ /* allow 20secs for mount/unmount for now - revisit */
+ if (kthread_should_stop() ||
+ (freezable_schedule_timeout(20*HZ) == 0)) {
+ finish_wait(&nn->nfsd_ssc_waitq, &wait);
+ kfree(work);
+ return nfserr_eagain;
+ }
+ finish_wait(&nn->nfsd_ssc_waitq, &wait);
+ goto try_again;
+ }
+ *nsui = ni;
+ refcount_inc(&ni->nsui_refcnt);
+ spin_unlock(&nn->nfsd_ssc_lock);
+ kfree(work);
+
+ /* return vfsmount in (*nsui)->nsui_vfsmount */
+ return 0;
+ }
+ if (work) {
+ strscpy(work->nsui_ipaddr, ipaddr, sizeof(work->nsui_ipaddr) - 1);
+ refcount_set(&work->nsui_refcnt, 2);
+ work->nsui_busy = true;
+ list_add_tail(&work->nsui_list, &nn->nfsd_ssc_mount_list);
+ *nsui = work;
+ } else
+ status = nfserr_resource;
+ spin_unlock(&nn->nfsd_ssc_lock);
+ return status;
+}
+
+static void nfsd4_ssc_update_dul(struct nfsd_net *nn,
+ struct nfsd4_ssc_umount_item *nsui,
+ struct vfsmount *ss_mnt)
+{
+ spin_lock(&nn->nfsd_ssc_lock);
+ nsui->nsui_vfsmount = ss_mnt;
+ nsui->nsui_busy = false;
+ wake_up_all(&nn->nfsd_ssc_waitq);
+ spin_unlock(&nn->nfsd_ssc_lock);
+}
+
+static void nfsd4_ssc_cancel_dul(struct nfsd_net *nn,
+ struct nfsd4_ssc_umount_item *nsui)
+{
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_del(&nsui->nsui_list);
+ wake_up_all(&nn->nfsd_ssc_waitq);
+ spin_unlock(&nn->nfsd_ssc_lock);
+ kfree(nsui);
+}
+
/*
* Support one copy source server for now.
*/
static __be32
nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
- struct vfsmount **mount)
+ struct nfsd4_ssc_umount_item **nsui)
{
struct file_system_type *type;
struct vfsmount *ss_mnt;
@@ -1181,12 +1388,14 @@ nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
char *ipaddr, *dev_name, *raw_data;
int len, raw_len;
__be32 status = nfserr_inval;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
naddr = &nss->u.nl4_addr;
tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
naddr->addr_len,
(struct sockaddr *)&tmp_addr,
sizeof(tmp_addr));
+ *nsui = NULL;
if (tmp_addrlen == 0)
goto out_err;
@@ -1229,14 +1438,23 @@ nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
goto out_free_rawdata;
snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
+ status = nfsd4_ssc_setup_dul(nn, ipaddr, nsui);
+ if (status)
+ goto out_free_devname;
+ if ((*nsui)->nsui_vfsmount)
+ goto out_done;
+
/* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
module_put(type->owner);
- if (IS_ERR(ss_mnt))
+ if (IS_ERR(ss_mnt)) {
+ status = nfserr_nodev;
+ nfsd4_ssc_cancel_dul(nn, *nsui);
goto out_free_devname;
-
+ }
+ nfsd4_ssc_update_dul(nn, *nsui, ss_mnt);
+out_done:
status = 0;
- *mount = ss_mnt;
out_free_devname:
kfree(dev_name);
@@ -1260,7 +1478,7 @@ nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
- struct nfsd4_copy *copy, struct vfsmount **mount)
+ struct nfsd4_copy *copy)
{
struct svc_fh *s_fh = NULL;
stateid_t *s_stid = ©->cp_src_stateid;
@@ -1273,14 +1491,14 @@ nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
if (status)
goto out;
- status = nfsd4_interssc_connect(©->cp_src, rqstp, mount);
+ status = nfsd4_interssc_connect(copy->cp_src, rqstp, ©->ss_nsui);
if (status)
goto out;
s_fh = &cstate->save_fh;
copy->c_fh.size = s_fh->fh_handle.fh_size;
- memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
+ memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_raw, copy->c_fh.size);
copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
sizeof(stateid_opaque_t));
@@ -1291,13 +1509,26 @@ nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
}
static void
-nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
+nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
struct nfsd_file *dst)
{
- nfs42_ssc_close(src->nf_file);
- fput(src->nf_file);
- nfsd_file_put(dst);
- mntput(ss_mnt);
+ struct nfsd_net *nn = net_generic(dst->nf_net, nfsd_net_id);
+ long timeout = msecs_to_jiffies(nfsd4_ssc_umount_timeout);
+
+ nfs42_ssc_close(filp);
+ fput(filp);
+
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_del(&nsui->nsui_list);
+ /*
+ * vfsmount can be shared by multiple exports,
+ * decrement refcnt. If the count drops to 1 it
+ * will be unmounted when nsui_expire expires.
+ */
+ refcount_dec(&nsui->nsui_refcnt);
+ nsui->nsui_expire = jiffies + timeout;
+ list_add_tail(&nsui->nsui_list, &nn->nfsd_ssc_mount_list);
+ spin_unlock(&nn->nfsd_ssc_lock);
}
#else /* CONFIG_NFSD_V4_2_INTER_SSC */
@@ -1305,15 +1536,13 @@ nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
static __be32
nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
- struct nfsd4_copy *copy,
- struct vfsmount **mount)
+ struct nfsd4_copy *copy)
{
- *mount = NULL;
return nfserr_inval;
}
static void
-nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
+nfsd4_cleanup_inter_ssc(struct nfsd4_ssc_umount_item *nsui, struct file *filp,
struct nfsd_file *dst)
{
}
@@ -1336,23 +1565,21 @@ nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
©->nf_dst);
}
-static void
-nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
-{
- nfsd_file_put(src);
- nfsd_file_put(dst);
-}
-
static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
{
- struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
+ struct nfsd4_cb_offload *cbo =
+ container_of(cb, struct nfsd4_cb_offload, co_cb);
- nfs4_put_copy(copy);
+ kfree(cbo);
}
static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
struct rpc_task *task)
{
+ struct nfsd4_cb_offload *cbo =
+ container_of(cb, struct nfsd4_cb_offload, co_cb);
+
+ trace_nfsd_cb_offload_done(&cbo->co_res.cb_stateid, task);
return 1;
}
@@ -1363,20 +1590,28 @@ static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
{
- copy->cp_res.wr_stable_how = NFS_UNSTABLE;
- copy->cp_synchronous = sync;
+ copy->cp_res.wr_stable_how =
+ test_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags) ?
+ NFS_FILE_SYNC : NFS_UNSTABLE;
+ nfsd4_copy_set_sync(copy, sync);
gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net);
}
-static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
+static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy,
+ struct file *dst,
+ struct file *src)
{
- struct file *dst = copy->nf_dst->nf_file;
- struct file *src = copy->nf_src->nf_file;
+ errseq_t since;
ssize_t bytes_copied = 0;
- size_t bytes_total = copy->cp_count;
+ u64 bytes_total = copy->cp_count;
u64 src_pos = copy->cp_src_pos;
u64 dst_pos = copy->cp_dst_pos;
+ int status;
+ loff_t end;
+ /* See RFC 7862 p.67: */
+ if (bytes_total == 0)
+ bytes_total = ULLONG_MAX;
do {
if (kthread_should_stop())
break;
@@ -1388,16 +1623,29 @@ static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
copy->cp_res.wr_bytes_written += bytes_copied;
src_pos += bytes_copied;
dst_pos += bytes_copied;
- } while (bytes_total > 0 && !copy->cp_synchronous);
+ } while (bytes_total > 0 && nfsd4_copy_is_async(copy));
+ /* for a non-zero asynchronous copy do a commit of data */
+ if (nfsd4_copy_is_async(copy) && copy->cp_res.wr_bytes_written > 0) {
+ since = READ_ONCE(dst->f_wb_err);
+ end = copy->cp_dst_pos + copy->cp_res.wr_bytes_written - 1;
+ status = vfs_fsync_range(dst, copy->cp_dst_pos, end, 0);
+ if (!status)
+ status = filemap_check_wb_err(dst->f_mapping, since);
+ if (!status)
+ set_bit(NFSD4_COPY_F_COMMITTED, ©->cp_flags);
+ }
return bytes_copied;
}
-static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
+static __be32 nfsd4_do_copy(struct nfsd4_copy *copy,
+ struct file *src, struct file *dst,
+ bool sync)
{
__be32 status;
ssize_t bytes;
- bytes = _nfsd_copy_file_range(copy);
+ bytes = _nfsd_copy_file_range(copy, dst, src);
+
/* for async copy, we ignore the error, client can always retry
* to get the error
*/
@@ -1407,13 +1655,6 @@ static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
nfsd4_init_copy_res(copy, sync);
status = nfs_ok;
}
-
- if (!copy->cp_intra) /* Inter server SSC */
- nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
- copy->nf_dst);
- else
- nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
-
return status;
}
@@ -1422,71 +1663,100 @@ static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
dst->cp_src_pos = src->cp_src_pos;
dst->cp_dst_pos = src->cp_dst_pos;
dst->cp_count = src->cp_count;
- dst->cp_synchronous = src->cp_synchronous;
+ dst->cp_flags = src->cp_flags;
memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
memcpy(&dst->fh, &src->fh, sizeof(src->fh));
dst->cp_clp = src->cp_clp;
dst->nf_dst = nfsd_file_get(src->nf_dst);
- dst->cp_intra = src->cp_intra;
- if (src->cp_intra) /* for inter, file_src doesn't exist yet */
+ /* for inter, nf_src doesn't exist yet */
+ if (!nfsd4_ssc_is_inter(src))
dst->nf_src = nfsd_file_get(src->nf_src);
memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
- memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
+ memcpy(dst->cp_src, src->cp_src, sizeof(struct nl4_server));
memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
- dst->ss_mnt = src->ss_mnt;
+ dst->ss_nsui = src->ss_nsui;
+}
+
+static void release_copy_files(struct nfsd4_copy *copy)
+{
+ if (copy->nf_src)
+ nfsd_file_put(copy->nf_src);
+ if (copy->nf_dst)
+ nfsd_file_put(copy->nf_dst);
}
static void cleanup_async_copy(struct nfsd4_copy *copy)
{
nfs4_free_copy_state(copy);
- nfsd_file_put(copy->nf_dst);
- if (copy->cp_intra)
- nfsd_file_put(copy->nf_src);
- spin_lock(©->cp_clp->async_lock);
- list_del(©->copies);
- spin_unlock(©->cp_clp->async_lock);
+ release_copy_files(copy);
+ if (copy->cp_clp) {
+ spin_lock(©->cp_clp->async_lock);
+ if (!list_empty(©->copies))
+ list_del_init(©->copies);
+ spin_unlock(©->cp_clp->async_lock);
+ }
nfs4_put_copy(copy);
}
+static void nfsd4_send_cb_offload(struct nfsd4_copy *copy, __be32 nfserr)
+{
+ struct nfsd4_cb_offload *cbo;
+
+ cbo = kzalloc(sizeof(*cbo), GFP_KERNEL);
+ if (!cbo)
+ return;
+
+ memcpy(&cbo->co_res, ©->cp_res, sizeof(copy->cp_res));
+ memcpy(&cbo->co_fh, ©->fh, sizeof(copy->fh));
+ cbo->co_nfserr = nfserr;
+
+ nfsd4_init_cb(&cbo->co_cb, copy->cp_clp, &nfsd4_cb_offload_ops,
+ NFSPROC4_CLNT_CB_OFFLOAD);
+ trace_nfsd_cb_offload(copy->cp_clp, &cbo->co_res.cb_stateid,
+ &cbo->co_fh, copy->cp_count, nfserr);
+ nfsd4_run_cb(&cbo->co_cb);
+}
+
+/**
+ * nfsd4_do_async_copy - kthread function for background server-side COPY
+ * @data: arguments for COPY operation
+ *
+ * Return values:
+ * %0: Copy operation is done.
+ */
static int nfsd4_do_async_copy(void *data)
{
struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
- struct nfsd4_copy *cb_copy;
+ __be32 nfserr;
- if (!copy->cp_intra) { /* Inter server SSC */
- copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
- if (!copy->nf_src) {
- copy->nfserr = nfserr_serverfault;
- /* ss_mnt will be unmounted by the laundromat */
- goto do_callback;
- }
- copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh,
- ©->stateid);
- if (IS_ERR(copy->nf_src->nf_file)) {
- copy->nfserr = nfserr_offload_denied;
+ if (nfsd4_ssc_is_inter(copy)) {
+ struct file *filp;
+
+ filp = nfs42_ssc_open(copy->ss_nsui->nsui_vfsmount,
+ ©->c_fh, ©->stateid);
+ if (IS_ERR(filp)) {
+ switch (PTR_ERR(filp)) {
+ case -EBADF:
+ nfserr = nfserr_wrong_type;
+ break;
+ default:
+ nfserr = nfserr_offload_denied;
+ }
/* ss_mnt will be unmounted by the laundromat */
goto do_callback;
}
+ nfserr = nfsd4_do_copy(copy, filp, copy->nf_dst->nf_file,
+ false);
+ nfsd4_cleanup_inter_ssc(copy->ss_nsui, filp, copy->nf_dst);
+ } else {
+ nfserr = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+ copy->nf_dst->nf_file, false);
}
- copy->nfserr = nfsd4_do_copy(copy, 0);
do_callback:
- cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
- if (!cb_copy)
- goto out;
- refcount_set(&cb_copy->refcount, 1);
- memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res));
- cb_copy->cp_clp = copy->cp_clp;
- cb_copy->nfserr = copy->nfserr;
- memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh));
- nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
- &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
- nfsd4_run_cb(&cb_copy->cp_cb);
-out:
- if (!copy->cp_intra)
- kfree(copy->nf_src);
+ nfsd4_send_cb_offload(copy, nfserr);
cleanup_async_copy(copy);
return 0;
}
@@ -1499,13 +1769,12 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
struct nfsd4_copy *async_copy = NULL;
- if (!copy->cp_intra) { /* Inter server SSC */
- if (!inter_copy_offload_enable || copy->cp_synchronous) {
+ if (nfsd4_ssc_is_inter(copy)) {
+ if (!inter_copy_offload_enable || nfsd4_copy_is_sync(copy)) {
status = nfserr_notsupp;
goto out;
}
- status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
- ©->ss_mnt);
+ status = nfsd4_setup_inter_ssc(rqstp, cstate, copy);
if (status)
return nfserr_offload_denied;
} else {
@@ -1517,17 +1786,21 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
copy->cp_clp = cstate->clp;
memcpy(©->fh, &cstate->current_fh.fh_handle,
sizeof(struct knfsd_fh));
- if (!copy->cp_synchronous) {
+ if (nfsd4_copy_is_async(copy)) {
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
status = nfserrno(-ENOMEM);
async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
if (!async_copy)
goto out_err;
+ INIT_LIST_HEAD(&async_copy->copies);
+ refcount_set(&async_copy->refcount, 1);
+ async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
+ if (!async_copy->cp_src)
+ goto out_err;
if (!nfs4_init_copy_state(nn, copy))
goto out_err;
- refcount_set(&async_copy->refcount, 1);
- memcpy(©->cp_res.cb_stateid, ©->cp_stateid.stid,
+ memcpy(©->cp_res.cb_stateid, ©->cp_stateid.cs_stid,
sizeof(copy->cp_res.cb_stateid));
dup_copy_fields(copy, async_copy);
async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
@@ -1541,18 +1814,24 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
wake_up_process(async_copy->copy_task);
status = nfs_ok;
} else {
- status = nfsd4_do_copy(copy, 1);
+ status = nfsd4_do_copy(copy, copy->nf_src->nf_file,
+ copy->nf_dst->nf_file, true);
}
out:
+ release_copy_files(copy);
return status;
out_err:
+ if (nfsd4_ssc_is_inter(copy)) {
+ /*
+ * Source's vfsmount of inter-copy will be unmounted
+ * by the laundromat. Use copy instead of async_copy
+ * since async_copy->ss_nsui might not be set yet.
+ */
+ refcount_dec(©->ss_nsui->nsui_refcnt);
+ }
if (async_copy)
cleanup_async_copy(async_copy);
status = nfserrno(-ENOMEM);
- /*
- * source's vfsmount of inter-copy will be unmounted
- * by the laundromat
- */
goto out;
}
@@ -1563,7 +1842,7 @@ find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
spin_lock(&clp->async_lock);
list_for_each_entry(copy, &clp->async_copies, copies) {
- if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
+ if (memcmp(©->cp_stateid.cs_stid, stateid, NFS4_STATEID_SIZE))
continue;
refcount_inc(©->refcount);
spin_unlock(&clp->async_lock);
@@ -1617,16 +1896,16 @@ nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
cps = nfs4_alloc_init_cpntf_state(nn, stid);
if (!cps)
goto out;
- memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
+ memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.cs_stid, sizeof(stateid_t));
memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
/* For now, only return one server address in cpn_src, the
* address used by the client to connect to this server.
*/
- cn->cpn_src.nl4_type = NL4_NETADDR;
+ cn->cpn_src->nl4_type = NL4_NETADDR;
status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
- &cn->cpn_src.u.nl4_addr);
+ &cn->cpn_src->u.nl4_addr);
WARN_ON_ONCE(status);
if (status) {
nfs4_put_cpntf_state(nn, cps);
@@ -1647,10 +1926,8 @@ nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&fallocate->falloc_stateid,
WR_STATE, &nf, NULL);
- if (status != nfs_ok) {
- dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
+ if (status != nfs_ok)
return status;
- }
status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
fallocate->falloc_offset,
@@ -1706,10 +1983,8 @@ nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
&seek->seek_stateid,
RD_STATE, &nf, NULL);
- if (status) {
- dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
+ if (status)
return status;
- }
switch (seek->seek_whence) {
case NFS4_CONTENT_DATA:
@@ -1877,7 +2152,7 @@ nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
nfserr = nfs_ok;
if (gdp->gd_maxcount != 0) {
nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
- rqstp, cstate->session->se_client, gdp);
+ rqstp, cstate->clp, gdp);
}
gdp->gd_notify_types &= ops->notify_types;
@@ -2163,7 +2438,7 @@ nfsd4_proc_null(struct svc_rqst *rqstp)
static inline void nfsd4_increment_op_stats(u32 opnum)
{
if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
- nfsdstats.nfs4_opcount[opnum]++;
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
}
static const struct nfsd4_operation nfsd4_ops[];
@@ -2253,25 +2528,6 @@ static bool need_wrongsec_check(struct svc_rqst *rqstp)
return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
}
-static void svcxdr_init_encode(struct svc_rqst *rqstp,
- struct nfsd4_compoundres *resp)
-{
- struct xdr_stream *xdr = &resp->xdr;
- struct xdr_buf *buf = &rqstp->rq_res;
- struct kvec *head = buf->head;
-
- xdr->buf = buf;
- xdr->iov = head;
- xdr->p = head->iov_base + head->iov_len;
- xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
- /* Tail and page_len should be zero at this point: */
- buf->len = buf->head[0].iov_len;
- xdr->scratch.iov_len = 0;
- xdr->page_ptr = buf->pages - 1;
- buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
- - rqstp->rq_auth_slack;
-}
-
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
static void
check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
@@ -2299,7 +2555,7 @@ check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
return;
}
putfh = (struct nfsd4_putfh *)&saved_op->u;
- if (!copy->cp_intra)
+ if (nfsd4_ssc_is_inter(copy))
putfh->no_verify = true;
}
}
@@ -2326,10 +2582,14 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
__be32 status;
- svcxdr_init_encode(rqstp, resp);
- resp->tagp = resp->xdr.p;
+ resp->xdr = &rqstp->rq_res_stream;
+ resp->statusp = resp->xdr->p;
+
+ /* reserve space for: NFS status code */
+ xdr_reserve_space(resp->xdr, XDR_UNIT);
+
/* reserve space for: taglen, tag, and opcnt */
- xdr_reserve_space(&resp->xdr, 8 + args->taglen);
+ xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
resp->taglen = args->taglen;
resp->tag = args->tag;
resp->rqstp = rqstp;
@@ -2348,9 +2608,6 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
status = nfserr_minor_vers_mismatch;
if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
goto out;
- status = nfserr_resource;
- if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
- goto out;
status = nfs41_check_op_ordering(args);
if (status) {
@@ -2363,10 +2620,20 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
rqstp->rq_lease_breaker = (void **)&cstate->clp;
- trace_nfsd_compound(rqstp, args->opcnt);
+ trace_nfsd_compound(rqstp, args->client_opcnt);
while (!status && resp->opcnt < args->opcnt) {
op = &args->ops[resp->opcnt++];
+ if (unlikely(resp->opcnt == NFSD_MAX_OPS_PER_COMPOUND)) {
+ /* If there are still more operations to process,
+ * stop here and report NFS4ERR_RESOURCE. */
+ if (cstate->minorversion == 0 &&
+ args->client_opcnt > resp->opcnt) {
+ op->status = nfserr_resource;
+ goto encode_op;
+ }
+ }
+
/*
* The XDR decode routines may have pre-set op->status;
* for example, if there is a miscellaneous XDR error
@@ -2390,13 +2657,13 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
goto encode_op;
}
- fh_clear_wcc(current_fh);
+ fh_clear_pre_post_attrs(current_fh);
/* If op is non-idempotent */
if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
/*
* Don't execute this op if we couldn't encode a
- * succesful reply:
+ * successful reply:
*/
u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
/*
@@ -2435,15 +2702,15 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
encode_op:
if (op->status == nfserr_replay_me) {
op->replay = &cstate->replay_owner->so_replay;
- nfsd4_encode_replay(&resp->xdr, op);
+ nfsd4_encode_replay(resp->xdr, op);
status = op->status = op->replay->rp_status;
} else {
nfsd4_encode_operation(resp, op);
status = op->status;
}
- trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
- nfsd4_op_name(op->opnum));
+ trace_nfsd_compound_status(args->client_opcnt, resp->opcnt,
+ status, nfsd4_op_name(op->opnum));
nfsd4_cstate_clear_replay(cstate);
nfsd4_increment_op_stats(op->opnum);
@@ -2477,28 +2744,49 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
-static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+/*
+ * The _rsize() helpers are invoked by the NFSv4 COMPOUND decoder, which
+ * is called before sunrpc sets rq_res.buflen. Thus we have to compute
+ * the maximum payload size here, based on transport limits and the size
+ * of the remaining space in the rq_pages array.
+ */
+static u32 nfsd4_max_payload(const struct svc_rqst *rqstp)
+{
+ u32 buflen;
+
+ buflen = (rqstp->rq_page_end - rqstp->rq_next_page) * PAGE_SIZE;
+ buflen -= rqstp->rq_auth_slack;
+ buflen -= rqstp->rq_res.head[0].iov_len;
+ return min_t(u32, buflen, svc_max_payload(rqstp));
+}
+
+static u32 nfsd4_only_status_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size) * sizeof(__be32);
}
-static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_status_stateid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
}
-static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_access_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
/* ac_supported, ac_resp_access */
return (op_encode_hdr_size + 2)* sizeof(__be32);
}
-static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_commit_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_create_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
@@ -2509,17 +2797,17 @@ static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op
* the op prematurely if the estimate is too large. We may turn off splice
* reads unnecessarily.
*/
-static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_getattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 *bmap = op->u.getattr.ga_bmval;
+ const u32 *bmap = op->u.getattr.ga_bmval;
u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
u32 ret = 0;
if (bmap0 & FATTR4_WORD0_ACL)
- return svc_max_payload(rqstp);
+ return nfsd4_max_payload(rqstp);
if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
- return svc_max_payload(rqstp);
+ return nfsd4_max_payload(rqstp);
if (bmap1 & FATTR4_WORD1_OWNER) {
ret += IDMAP_NAMESZ + 4;
@@ -2547,24 +2835,28 @@ static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
return ret;
}
-static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_getfh_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
}
-static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_link_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
-static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_lock_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
* sizeof(__be32);
}
-static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_open_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_stateid_maxsz
+ op_encode_change_info_maxsz + 1
@@ -2572,20 +2864,18 @@ static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+ op_encode_delegation_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_read_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount = 0, rlen = 0;
-
- maxcount = svc_max_payload(rqstp);
- rlen = min(op->u.read.rd_length, maxcount);
+ u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
-static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_read_plus_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount = svc_max_payload(rqstp);
- u32 rlen = min(op->u.read.rd_length, maxcount);
+ u32 rlen = min(op->u.read.rd_length, nfsd4_max_payload(rqstp));
/*
* If we detect that the file changed during hole encoding, then we
* recover by encoding the remaining reply as data. This means we need
@@ -2596,70 +2886,77 @@ static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op
return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
-static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_readdir_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount = 0, rlen = 0;
-
- maxcount = svc_max_payload(rqstp);
- rlen = min(op->u.readdir.rd_maxcount, maxcount);
+ u32 rlen = min(op->u.readdir.rd_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + op_encode_verifier_maxsz +
XDR_QUADLEN(rlen)) * sizeof(__be32);
}
-static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_readlink_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
}
-static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_remove_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
-static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_rename_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz
+ op_encode_change_info_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_sequence_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size
+ XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
}
-static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_test_stateid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
* sizeof(__be32);
}
-static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_setattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_secinfo_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
(4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
}
-static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_setclientid_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
sizeof(__be32);
}
-static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_write_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_exchange_id_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1 + 1 + /* eir_flags, spr_how */\
@@ -2673,14 +2970,16 @@ static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_o
0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
}
-static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_bind_conn_to_session_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
}
-static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_create_session_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + \
XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
@@ -2689,7 +2988,8 @@ static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd
op_encode_channel_attrs_maxsz) * sizeof(__be32);
}
-static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_copy_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* wr_callback */ +
@@ -2701,16 +3001,16 @@ static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1 /* cr_synchronous */) * sizeof(__be32);
}
-static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_offload_status_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
2 /* osr_count */ +
1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
}
-static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_copy_notify_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
3 /* cnr_lease_time */ +
@@ -2725,12 +3025,10 @@ static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
}
#ifdef CONFIG_NFSD_PNFS
-static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_getdeviceinfo_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount = 0, rlen = 0;
-
- maxcount = svc_max_payload(rqstp);
- rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
+ u32 rlen = min(op->u.getdeviceinfo.gd_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size +
1 /* gd_layout_type*/ +
@@ -2743,7 +3041,8 @@ static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4
* so we need to define an arbitrary upper bound here.
*/
#define MAX_LAYOUT_SIZE 128
-static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutget_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* logr_return_on_close */ +
@@ -2752,14 +3051,16 @@ static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op
MAX_LAYOUT_SIZE) * sizeof(__be32);
}
-static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutcommit_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* locr_newsize */ +
2 /* ns_size */) * sizeof(__be32);
}
-static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_layoutreturn_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size +
1 /* lrs_stateid */ +
@@ -2768,41 +3069,36 @@ static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_
#endif /* CONFIG_NFSD_PNFS */
-static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
+static u32 nfsd4_seek_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + 3) * sizeof(__be32);
}
-static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_getxattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount, rlen;
-
- maxcount = svc_max_payload(rqstp);
- rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
+ u32 rlen = min_t(u32, XATTR_SIZE_MAX, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
-static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_setxattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
}
-static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_listxattrs_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
- u32 maxcount, rlen;
-
- maxcount = svc_max_payload(rqstp);
- rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
+ u32 rlen = min(op->u.listxattrs.lsxa_maxcount, nfsd4_max_payload(rqstp));
return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
}
-static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
- struct nfsd4_op *op)
+static u32 nfsd4_removexattr_rsize(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op)
{
return (op_encode_hdr_size + op_encode_change_info_maxsz)
* sizeof(__be32);
@@ -3235,7 +3531,7 @@ bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
{
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct nfsd4_compoundargs *argp = rqstp->rq_argp;
- struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
+ struct nfsd4_op *this;
struct nfsd4_compound_state *cstate = &resp->cstate;
struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
u32 opiter;
@@ -3272,7 +3568,7 @@ int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
void warn_on_nonidempotent_op(struct nfsd4_op *op)
{
if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
- pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
+ pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
op->opnum, nfsd4_op_name(op->opnum));
WARN_ON_ONCE(1);
}
@@ -3285,28 +3581,29 @@ static const char *nfsd4_op_name(unsigned opnum)
return "unknown_operation";
}
-#define nfsd4_voidres nfsd4_voidargs
-struct nfsd4_voidargs { int dummy; };
-
static const struct svc_procedure nfsd_procedures4[2] = {
[NFSPROC4_NULL] = {
.pc_func = nfsd4_proc_null,
- .pc_decode = nfs4svc_decode_voidarg,
- .pc_encode = nfs4svc_encode_voidres,
- .pc_argsize = sizeof(struct nfsd4_voidargs),
- .pc_ressize = sizeof(struct nfsd4_voidres),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 1,
+ .pc_name = "NULL",
},
[NFSPROC4_COMPOUND] = {
.pc_func = nfsd4_proc_compound,
.pc_decode = nfs4svc_decode_compoundargs,
.pc_encode = nfs4svc_encode_compoundres,
.pc_argsize = sizeof(struct nfsd4_compoundargs),
+ .pc_argzero = offsetof(struct nfsd4_compoundargs, iops),
.pc_ressize = sizeof(struct nfsd4_compoundres),
.pc_release = nfsd4_release_compoundargs,
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = NFSD_BUFSIZE/4,
+ .pc_name = "COMPOUND",
},
};
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 83c4e6883953..189c622dde61 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -626,7 +626,7 @@ nfsd4_legacy_tracking_init(struct net *net)
status = nfsd4_load_reboot_recovery_data(net);
if (status)
goto err;
- printk("NFSD: Using legacy client tracking operations.\n");
+ pr_info("NFSD: Using legacy client tracking operations.\n");
return 0;
err:
@@ -807,17 +807,17 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
if (get_user(namelen, &ci->cc_name.cn_len))
return -EFAULT;
name.data = memdup_user(&ci->cc_name.cn_id, namelen);
- if (IS_ERR_OR_NULL(name.data))
- return -EFAULT;
+ if (IS_ERR(name.data))
+ return PTR_ERR(name.data);
name.len = namelen;
get_user(princhashlen, &ci->cc_princhash.cp_len);
if (princhashlen > 0) {
princhash.data = memdup_user(
&ci->cc_princhash.cp_data,
princhashlen);
- if (IS_ERR_OR_NULL(princhash.data)) {
+ if (IS_ERR(princhash.data)) {
kfree(name.data);
- return -EFAULT;
+ return PTR_ERR(princhash.data);
}
princhash.len = princhashlen;
} else
@@ -829,8 +829,8 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg,
if (get_user(namelen, &cnm->cn_len))
return -EFAULT;
name.data = memdup_user(&cnm->cn_id, namelen);
- if (IS_ERR_OR_NULL(name.data))
- return -EFAULT;
+ if (IS_ERR(name.data))
+ return PTR_ERR(name.data);
name.len = namelen;
}
if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) {
@@ -1030,7 +1030,7 @@ nfsd4_init_cld_pipe(struct net *net)
status = __nfsd4_init_cld_pipe(net);
if (!status)
- printk("NFSD: Using old nfsdcld client tracking operations.\n");
+ pr_info("NFSD: Using old nfsdcld client tracking operations.\n");
return status;
}
@@ -1607,7 +1607,7 @@ nfsd4_cld_tracking_init(struct net *net)
nfs4_release_reclaim(nn);
goto err_remove;
} else
- printk("NFSD: Using nfsdcld client tracking operations.\n");
+ pr_info("NFSD: Using nfsdcld client tracking operations.\n");
return 0;
err_remove:
@@ -1866,7 +1866,7 @@ nfsd4_umh_cltrack_init(struct net *net)
ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL);
kfree(grace_start);
if (!ret)
- printk("NFSD: Using UMH upcall client tracking operations.\n");
+ pr_info("NFSD: Using UMH upcall client tracking operations.\n");
return ret;
}
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d402ca0b535f..228560f3fd0e 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -43,6 +43,10 @@
#include <linux/sunrpc/addr.h>
#include <linux/jhash.h>
#include <linux/string_helpers.h>
+#include <linux/fsnotify.h>
+#include <linux/rhashtable.h>
+#include <linux/nfs_ssc.h>
+
#include "xdr4.h"
#include "xdr4cb.h"
#include "vfs.h"
@@ -82,6 +86,7 @@ static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
void nfsd4_end_grace(struct nfsd_net *nn);
static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps);
+static void nfsd4_file_hash_remove(struct nfs4_file *fi);
/* Locking: */
@@ -123,6 +128,23 @@ static void free_session(struct nfsd4_session *);
static const struct nfsd4_callback_ops nfsd4_cb_recall_ops;
static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops;
+static struct workqueue_struct *laundry_wq;
+
+int nfsd4_create_laundry_wq(void)
+{
+ int rc = 0;
+
+ laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
+ if (laundry_wq == NULL)
+ rc = -ENOMEM;
+ return rc;
+}
+
+void nfsd4_destroy_laundry_wq(void)
+{
+ destroy_workqueue(laundry_wq);
+}
+
static bool is_session_dead(struct nfsd4_session *ses)
{
return ses->se_flags & NFS4_SESSION_DEAD;
@@ -141,6 +163,13 @@ static bool is_client_expired(struct nfs4_client *clp)
return clp->cl_time == 0;
}
+static void nfsd4_dec_courtesy_client_count(struct nfsd_net *nn,
+ struct nfs4_client *clp)
+{
+ if (clp->cl_state != NFSD4_ACTIVE)
+ atomic_add_unless(&nn->nfsd_courtesy_clients, -1, 0);
+}
+
static __be32 get_client_locked(struct nfs4_client *clp)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
@@ -150,6 +179,8 @@ static __be32 get_client_locked(struct nfs4_client *clp)
if (is_client_expired(clp))
return nfserr_expired;
atomic_inc(&clp->cl_rpc_users);
+ nfsd4_dec_courtesy_client_count(nn, clp);
+ clp->cl_state = NFSD4_ACTIVE;
return nfs_ok;
}
@@ -170,6 +201,8 @@ renew_client_locked(struct nfs4_client *clp)
list_move_tail(&clp->cl_lru, &nn->client_lru);
clp->cl_time = ktime_get_boottime_seconds();
+ nfsd4_dec_courtesy_client_count(nn, clp);
+ clp->cl_state = NFSD4_ACTIVE;
}
static void put_client_renew_locked(struct nfs4_client *clp)
@@ -244,6 +277,7 @@ find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
list_for_each_entry(cur, &lo->lo_blocked, nbl_list) {
if (fh_match(fh, &cur->nbl_fh)) {
list_del_init(&cur->nbl_list);
+ WARN_ON(list_empty(&cur->nbl_lru));
list_del_init(&cur->nbl_lru);
found = cur;
break;
@@ -269,6 +303,7 @@ find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
INIT_LIST_HEAD(&nbl->nbl_lru);
fh_copy_shallow(&nbl->nbl_fh, fh);
locks_init_lock(&nbl->nbl_lock);
+ kref_init(&nbl->nbl_kref);
nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client,
&nfsd4_cb_notify_lock_ops,
NFSPROC4_CLNT_CB_NOTIFY_LOCK);
@@ -278,13 +313,22 @@ find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
}
static void
-free_blocked_lock(struct nfsd4_blocked_lock *nbl)
+free_nbl(struct kref *kref)
{
- locks_delete_block(&nbl->nbl_lock);
+ struct nfsd4_blocked_lock *nbl;
+
+ nbl = container_of(kref, struct nfsd4_blocked_lock, nbl_kref);
locks_release_private(&nbl->nbl_lock);
kfree(nbl);
}
+static void
+free_blocked_lock(struct nfsd4_blocked_lock *nbl)
+{
+ locks_delete_block(&nbl->nbl_lock);
+ kref_put(&nbl->nbl_kref, free_nbl);
+}
+
static void
remove_blocked_locks(struct nfs4_lockowner *lo)
{
@@ -300,6 +344,7 @@ remove_blocked_locks(struct nfs4_lockowner *lo)
struct nfsd4_blocked_lock,
nbl_list);
list_del_init(&nbl->nbl_list);
+ WARN_ON(list_empty(&nbl->nbl_lru));
list_move(&nbl->nbl_lru, &reaplist);
}
spin_unlock(&nn->blocked_locks_lock);
@@ -324,6 +369,8 @@ nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
static int
nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
{
+ trace_nfsd_cb_notify_lock_done(&zero_stateid, task);
+
/*
* Since this is just an optimization, we don't try very hard if it
* turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and
@@ -353,6 +400,130 @@ static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
.release = nfsd4_cb_notify_lock_release,
};
+/*
+ * We store the NONE, READ, WRITE, and BOTH bits separately in the
+ * st_{access,deny}_bmap field of the stateid, in order to track not
+ * only what share bits are currently in force, but also what
+ * combinations of share bits previous opens have used. This allows us
+ * to enforce the recommendation in
+ * https://datatracker.ietf.org/doc/html/rfc7530#section-16.19.4 that
+ * the server return an error if the client attempt to downgrade to a
+ * combination of share bits not explicable by closing some of its
+ * previous opens.
+ *
+ * This enforcement is arguably incomplete, since we don't keep
+ * track of access/deny bit combinations; so, e.g., we allow:
+ *
+ * OPEN allow read, deny write
+ * OPEN allow both, deny none
+ * DOWNGRADE allow read, deny none
+ *
+ * which we should reject.
+ *
+ * But you could also argue that our current code is already overkill,
+ * since it only exists to return NFS4ERR_INVAL on incorrect client
+ * behavior.
+ */
+static unsigned int
+bmap_to_share_mode(unsigned long bmap)
+{
+ int i;
+ unsigned int access = 0;
+
+ for (i = 1; i < 4; i++) {
+ if (test_bit(i, &bmap))
+ access |= i;
+ }
+ return access;
+}
+
+/* set share access for a given stateid */
+static inline void
+set_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << access;
+
+ WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
+ stp->st_access_bmap |= mask;
+}
+
+/* clear share access for a given stateid */
+static inline void
+clear_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << access;
+
+ WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
+ stp->st_access_bmap &= ~mask;
+}
+
+/* test whether a given stateid has access */
+static inline bool
+test_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << access;
+
+ return (bool)(stp->st_access_bmap & mask);
+}
+
+/* set share deny for a given stateid */
+static inline void
+set_deny(u32 deny, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << deny;
+
+ WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
+ stp->st_deny_bmap |= mask;
+}
+
+/* clear share deny for a given stateid */
+static inline void
+clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << deny;
+
+ WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
+ stp->st_deny_bmap &= ~mask;
+}
+
+/* test whether a given stateid is denying specific access */
+static inline bool
+test_deny(u32 deny, struct nfs4_ol_stateid *stp)
+{
+ unsigned char mask = 1 << deny;
+
+ return (bool)(stp->st_deny_bmap & mask);
+}
+
+static int nfs4_access_to_omode(u32 access)
+{
+ switch (access & NFS4_SHARE_ACCESS_BOTH) {
+ case NFS4_SHARE_ACCESS_READ:
+ return O_RDONLY;
+ case NFS4_SHARE_ACCESS_WRITE:
+ return O_WRONLY;
+ case NFS4_SHARE_ACCESS_BOTH:
+ return O_RDWR;
+ }
+ WARN_ON_ONCE(1);
+ return O_RDONLY;
+}
+
+static inline int
+access_permit_read(struct nfs4_ol_stateid *stp)
+{
+ return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
+ test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
+ test_access(NFS4_SHARE_ACCESS_WRITE, stp);
+}
+
+static inline int
+access_permit_write(struct nfs4_ol_stateid *stp)
+{
+ return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
+ test_access(NFS4_SHARE_ACCESS_BOTH, stp);
+}
+
static inline struct nfs4_stateowner *
nfs4_get_stateowner(struct nfs4_stateowner *sop)
{
@@ -420,11 +591,8 @@ static void nfsd4_free_file_rcu(struct rcu_head *rcu)
void
put_nfs4_file(struct nfs4_file *fi)
{
- might_lock(&state_lock);
-
- if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) {
- hlist_del_rcu(&fi->fi_hash);
- spin_unlock(&state_lock);
+ if (refcount_dec_and_test(&fi->fi_ref)) {
+ nfsd4_file_hash_remove(fi);
WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate));
WARN_ON_ONCE(!list_empty(&fi->fi_delegations));
call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu);
@@ -434,9 +602,7 @@ put_nfs4_file(struct nfs4_file *fi)
static struct nfsd_file *
__nfs4_get_fd(struct nfs4_file *f, int oflag)
{
- if (f->fi_fds[oflag])
- return nfsd_file_get(f->fi_fds[oflag]);
- return NULL;
+ return nfsd_file_get(f->fi_fds[oflag]);
}
static struct nfsd_file *
@@ -549,21 +715,71 @@ static unsigned int ownerstr_hashval(struct xdr_netobj *ownername)
return ret & OWNER_HASH_MASK;
}
-/* hash table for nfs4_file */
-#define FILE_HASH_BITS 8
-#define FILE_HASH_SIZE (1 << FILE_HASH_BITS)
+static struct rhltable nfs4_file_rhltable ____cacheline_aligned_in_smp;
-static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh)
-{
- return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0);
-}
+static const struct rhashtable_params nfs4_file_rhash_params = {
+ .key_len = sizeof_field(struct nfs4_file, fi_inode),
+ .key_offset = offsetof(struct nfs4_file, fi_inode),
+ .head_offset = offsetof(struct nfs4_file, fi_rlist),
-static unsigned int file_hashval(struct knfsd_fh *fh)
+ /*
+ * Start with a single page hash table to reduce resizing churn
+ * on light workloads.
+ */
+ .min_size = 256,
+ .automatic_shrinking = true,
+};
+
+/*
+ * Check if courtesy clients have conflicting access and resolve it if possible
+ *
+ * access: is op_share_access if share_access is true.
+ * Check if access mode, op_share_access, would conflict with
+ * the current deny mode of the file 'fp'.
+ * access: is op_share_deny if share_access is false.
+ * Check if the deny mode, op_share_deny, would conflict with
+ * current access of the file 'fp'.
+ * stp: skip checking this entry.
+ * new_stp: normal open, not open upgrade.
+ *
+ * Function returns:
+ * false - access/deny mode conflict with normal client.
+ * true - no conflict or conflict with courtesy client(s) is resolved.
+ */
+static bool
+nfs4_resolve_deny_conflicts_locked(struct nfs4_file *fp, bool new_stp,
+ struct nfs4_ol_stateid *stp, u32 access, bool share_access)
{
- return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1);
-}
+ struct nfs4_ol_stateid *st;
+ bool resolvable = true;
+ unsigned char bmap;
+ struct nfsd_net *nn;
+ struct nfs4_client *clp;
-static struct hlist_head file_hashtbl[FILE_HASH_SIZE];
+ lockdep_assert_held(&fp->fi_lock);
+ list_for_each_entry(st, &fp->fi_stateids, st_perfile) {
+ /* ignore lock stateid */
+ if (st->st_openstp)
+ continue;
+ if (st == stp && new_stp)
+ continue;
+ /* check file access against deny mode or vice versa */
+ bmap = share_access ? st->st_deny_bmap : st->st_access_bmap;
+ if (!(access & bmap_to_share_mode(bmap)))
+ continue;
+ clp = st->st_stid.sc_client;
+ if (try_to_expire_client(clp))
+ continue;
+ resolvable = false;
+ break;
+ }
+ if (resolvable) {
+ clp = stp->st_stid.sc_client;
+ nn = net_generic(clp->net, nfsd_net_id);
+ mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);
+ }
+ return resolvable;
+}
static void
__nfs4_file_get_access(struct nfs4_file *fp, u32 access)
@@ -768,23 +984,23 @@ struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *sla
* Create a unique stateid_t to represent each COPY.
*/
static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid,
- unsigned char sc_type)
+ unsigned char cs_type)
{
int new_id;
- stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
- stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
- stid->sc_type = sc_type;
+ stid->cs_stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time;
+ stid->cs_stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id;
idr_preload(GFP_KERNEL);
spin_lock(&nn->s2s_cp_lock);
new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT);
- stid->stid.si_opaque.so_id = new_id;
- stid->stid.si_generation = 1;
+ stid->cs_stid.si_opaque.so_id = new_id;
+ stid->cs_stid.si_generation = 1;
spin_unlock(&nn->s2s_cp_lock);
idr_preload_end();
if (new_id < 0)
return 0;
+ stid->cs_type = cs_type;
return 1;
}
@@ -802,7 +1018,7 @@ struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
if (!cps)
return NULL;
cps->cpntf_time = ktime_get_boottime_seconds();
- refcount_set(&cps->cp_stateid.sc_count, 1);
+ refcount_set(&cps->cp_stateid.cs_count, 1);
if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID))
goto out_free;
spin_lock(&nn->s2s_cp_lock);
@@ -818,11 +1034,12 @@ void nfs4_free_copy_state(struct nfsd4_copy *copy)
{
struct nfsd_net *nn;
- WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID);
+ if (copy->cp_stateid.cs_type != NFS4_COPY_STID)
+ return;
nn = net_generic(copy->cp_clp->net, nfsd_net_id);
spin_lock(&nn->s2s_cp_lock);
idr_remove(&nn->s2s_cp_stateids,
- copy->cp_stateid.stid.si_opaque.so_id);
+ copy->cp_stateid.cs_stid.si_opaque.so_id);
spin_unlock(&nn->s2s_cp_lock);
}
@@ -854,7 +1071,12 @@ static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp)
static void nfs4_free_deleg(struct nfs4_stid *stid)
{
- WARN_ON(!list_empty(&stid->sc_cp_list));
+ struct nfs4_delegation *dp = delegstateid(stid);
+
+ WARN_ON_ONCE(!list_empty(&stid->sc_cp_list));
+ WARN_ON_ONCE(!list_empty(&dp->dl_perfile));
+ WARN_ON_ONCE(!list_empty(&dp->dl_perclnt));
+ WARN_ON_ONCE(!list_empty(&dp->dl_recall_lru));
kmem_cache_free(deleg_slab, stid);
atomic_long_dec(&num_delegations);
}
@@ -904,7 +1126,7 @@ static int delegation_blocked(struct knfsd_fh *fh)
}
spin_unlock(&blocked_delegations_lock);
}
- hash = jhash(&fh->fh_base, fh->fh_size, 0);
+ hash = jhash(&fh->fh_raw, fh->fh_size, 0);
if (test_bit(hash&255, bd->set[0]) &&
test_bit((hash>>8)&255, bd->set[0]) &&
test_bit((hash>>16)&255, bd->set[0]))
@@ -923,7 +1145,7 @@ static void block_delegations(struct knfsd_fh *fh)
u32 hash;
struct bloom_pair *bd = &blocked_delegations;
- hash = jhash(&fh->fh_base, fh->fh_size, 0);
+ hash = jhash(&fh->fh_raw, fh->fh_size, 0);
spin_lock(&blocked_delegations_lock);
__set_bit(hash&255, bd->set[bd->new]);
@@ -937,7 +1159,6 @@ static void block_delegations(struct knfsd_fh *fh)
static struct nfs4_delegation *
alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
- struct svc_fh *current_fh,
struct nfs4_clnt_odstate *odstate)
{
struct nfs4_delegation *dp;
@@ -947,7 +1168,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
n = atomic_long_inc_return(&num_delegations);
if (n < 0 || n > max_delegations)
goto out_dec;
- if (delegation_blocked(¤t_fh->fh_handle))
+ if (delegation_blocked(&fp->fi_fhandle))
goto out_dec;
dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg));
if (dp == NULL)
@@ -966,6 +1187,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp,
get_clnt_odstate(odstate);
dp->dl_type = NFS4_OPEN_DELEGATE_READ;
dp->dl_retries = 1;
+ dp->dl_recalled = false;
nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
&nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL);
get_nfs4_file(fp);
@@ -1144,6 +1366,8 @@ static void revoke_delegation(struct nfs4_delegation *dp)
WARN_ON(!list_empty(&dp->dl_recall_lru));
+ trace_nfsd_stid_revoke(&dp->dl_stid);
+
if (clp->cl_minorversion) {
spin_lock(&clp->cl_lock);
dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID;
@@ -1169,175 +1393,73 @@ static unsigned int clientstr_hashval(struct xdr_netobj name)
}
/*
- * We store the NONE, READ, WRITE, and BOTH bits separately in the
- * st_{access,deny}_bmap field of the stateid, in order to track not
- * only what share bits are currently in force, but also what
- * combinations of share bits previous opens have used. This allows us
- * to enforce the recommendation of rfc 3530 14.2.19 that the server
- * return an error if the client attempt to downgrade to a combination
- * of share bits not explicable by closing some of its previous opens.
- *
- * XXX: This enforcement is actually incomplete, since we don't keep
- * track of access/deny bit combinations; so, e.g., we allow:
- *
- * OPEN allow read, deny write
- * OPEN allow both, deny none
- * DOWNGRADE allow read, deny none
- *
- * which we should reject.
+ * A stateid that had a deny mode associated with it is being released
+ * or downgraded. Recalculate the deny mode on the file.
*/
-static unsigned int
-bmap_to_share_mode(unsigned long bmap) {
+static void
+recalculate_deny_mode(struct nfs4_file *fp)
+{
+ struct nfs4_ol_stateid *stp;
+
+ spin_lock(&fp->fi_lock);
+ fp->fi_share_deny = 0;
+ list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
+ fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
+ spin_unlock(&fp->fi_lock);
+}
+
+static void
+reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
+{
int i;
- unsigned int access = 0;
+ bool change = false;
for (i = 1; i < 4; i++) {
- if (test_bit(i, &bmap))
- access |= i;
+ if ((i & deny) != i) {
+ change = true;
+ clear_deny(i, stp);
+ }
}
- return access;
+
+ /* Recalculate per-file deny mode if there was a change */
+ if (change)
+ recalculate_deny_mode(stp->st_stid.sc_file);
}
-/* set share access for a given stateid */
-static inline void
-set_access(u32 access, struct nfs4_ol_stateid *stp)
+/* release all access and file references for a given stateid */
+static void
+release_all_access(struct nfs4_ol_stateid *stp)
{
- unsigned char mask = 1 << access;
+ int i;
+ struct nfs4_file *fp = stp->st_stid.sc_file;
- WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
- stp->st_access_bmap |= mask;
+ if (fp && stp->st_deny_bmap != 0)
+ recalculate_deny_mode(fp);
+
+ for (i = 1; i < 4; i++) {
+ if (test_access(i, stp))
+ nfs4_file_put_access(stp->st_stid.sc_file, i);
+ clear_access(i, stp);
+ }
}
-/* clear share access for a given stateid */
-static inline void
-clear_access(u32 access, struct nfs4_ol_stateid *stp)
+static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
{
- unsigned char mask = 1 << access;
-
- WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH);
- stp->st_access_bmap &= ~mask;
+ kfree(sop->so_owner.data);
+ sop->so_ops->so_free(sop);
}
-/* test whether a given stateid has access */
-static inline bool
-test_access(u32 access, struct nfs4_ol_stateid *stp)
+static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
{
- unsigned char mask = 1 << access;
+ struct nfs4_client *clp = sop->so_client;
- return (bool)(stp->st_access_bmap & mask);
-}
-
-/* set share deny for a given stateid */
-static inline void
-set_deny(u32 deny, struct nfs4_ol_stateid *stp)
-{
- unsigned char mask = 1 << deny;
-
- WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
- stp->st_deny_bmap |= mask;
-}
-
-/* clear share deny for a given stateid */
-static inline void
-clear_deny(u32 deny, struct nfs4_ol_stateid *stp)
-{
- unsigned char mask = 1 << deny;
-
- WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH);
- stp->st_deny_bmap &= ~mask;
-}
-
-/* test whether a given stateid is denying specific access */
-static inline bool
-test_deny(u32 deny, struct nfs4_ol_stateid *stp)
-{
- unsigned char mask = 1 << deny;
-
- return (bool)(stp->st_deny_bmap & mask);
-}
-
-static int nfs4_access_to_omode(u32 access)
-{
- switch (access & NFS4_SHARE_ACCESS_BOTH) {
- case NFS4_SHARE_ACCESS_READ:
- return O_RDONLY;
- case NFS4_SHARE_ACCESS_WRITE:
- return O_WRONLY;
- case NFS4_SHARE_ACCESS_BOTH:
- return O_RDWR;
- }
- WARN_ON_ONCE(1);
- return O_RDONLY;
-}
-
-/*
- * A stateid that had a deny mode associated with it is being released
- * or downgraded. Recalculate the deny mode on the file.
- */
-static void
-recalculate_deny_mode(struct nfs4_file *fp)
-{
- struct nfs4_ol_stateid *stp;
-
- spin_lock(&fp->fi_lock);
- fp->fi_share_deny = 0;
- list_for_each_entry(stp, &fp->fi_stateids, st_perfile)
- fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
- spin_unlock(&fp->fi_lock);
-}
-
-static void
-reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp)
-{
- int i;
- bool change = false;
-
- for (i = 1; i < 4; i++) {
- if ((i & deny) != i) {
- change = true;
- clear_deny(i, stp);
- }
- }
-
- /* Recalculate per-file deny mode if there was a change */
- if (change)
- recalculate_deny_mode(stp->st_stid.sc_file);
-}
-
-/* release all access and file references for a given stateid */
-static void
-release_all_access(struct nfs4_ol_stateid *stp)
-{
- int i;
- struct nfs4_file *fp = stp->st_stid.sc_file;
-
- if (fp && stp->st_deny_bmap != 0)
- recalculate_deny_mode(fp);
-
- for (i = 1; i < 4; i++) {
- if (test_access(i, stp))
- nfs4_file_put_access(stp->st_stid.sc_file, i);
- clear_access(i, stp);
- }
-}
-
-static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop)
-{
- kfree(sop->so_owner.data);
- sop->so_ops->so_free(sop);
-}
-
-static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
-{
- struct nfs4_client *clp = sop->so_client;
-
- might_lock(&clp->cl_lock);
-
- if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
- return;
- sop->so_ops->so_unhash(sop);
- spin_unlock(&clp->cl_lock);
- nfs4_free_stateowner(sop);
+ might_lock(&clp->cl_lock);
+
+ if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
+ return;
+ sop->so_ops->so_unhash(sop);
+ spin_unlock(&clp->cl_lock);
+ nfs4_free_stateowner(sop);
}
static bool
@@ -1710,13 +1832,12 @@ static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs,
int numslots = fattrs->maxreqs;
int slotsize = slot_bytes(fattrs);
struct nfsd4_session *new;
- int mem, i;
+ int i;
- BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *)
- + sizeof(struct nfsd4_session) > PAGE_SIZE);
- mem = numslots * sizeof(struct nfsd4_slot *);
+ BUILD_BUG_ON(struct_size(new, se_slots, NFSD_MAX_SLOTS_PER_SESSION)
+ > PAGE_SIZE);
- new = kzalloc(sizeof(*new) + mem, GFP_KERNEL);
+ new = kzalloc(struct_size(new, se_slots, numslots), GFP_KERNEL);
if (!new)
return NULL;
/* allocate each struct nfsd4_slot and data cache in one piece */
@@ -1748,6 +1869,8 @@ static void nfsd4_conn_lost(struct svc_xpt_user *u)
struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user);
struct nfs4_client *clp = c->cn_session->se_client;
+ trace_nfsd_cb_lost(clp);
+
spin_lock(&clp->cl_lock);
if (!list_empty(&c->cn_persession)) {
list_del(&c->cn_persession);
@@ -1959,11 +2082,16 @@ STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn)
* This type of memory management is somewhat inefficient, but we use it
* anyway since SETCLIENTID is not a common operation.
*/
-static struct nfs4_client *alloc_client(struct xdr_netobj name)
+static struct nfs4_client *alloc_client(struct xdr_netobj name,
+ struct nfsd_net *nn)
{
struct nfs4_client *clp;
int i;
+ if (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) {
+ mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);
+ return NULL;
+ }
clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
if (clp == NULL)
return NULL;
@@ -1981,6 +2109,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
idr_init(&clp->cl_stateids);
atomic_set(&clp->cl_rpc_users, 0);
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
+ clp->cl_state = NFSD4_ACTIVE;
+ atomic_inc(&nn->nfs4_client_count);
+ atomic_set(&clp->cl_delegs_in_recall, 0);
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_openowners);
INIT_LIST_HEAD(&clp->cl_delegations);
@@ -2012,6 +2143,7 @@ static void __free_client(struct kref *k)
kfree(clp->cl_nii_domain.data);
kfree(clp->cl_nii_name.data);
idr_destroy(&clp->cl_stateids);
+ kfree(clp->cl_ra);
kmem_cache_free(client_slab, clp);
}
@@ -2087,6 +2219,7 @@ static __be32 mark_client_expired_locked(struct nfs4_client *clp)
static void
__destroy_client(struct nfs4_client *clp)
{
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
int i;
struct nfs4_openowner *oo;
struct nfs4_delegation *dp;
@@ -2130,6 +2263,8 @@ __destroy_client(struct nfs4_client *clp)
nfsd4_shutdown_callback(clp);
if (clp->cl_cb_conn.cb_xprt)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
+ atomic_add_unless(&nn->nfs4_client_count, -1, 0);
+ nfsd4_dec_courtesy_client_count(nn, clp);
free_client(clp);
wake_up_all(&expiry_wq);
}
@@ -2358,9 +2493,24 @@ static void seq_quote_mem(struct seq_file *m, char *data, int len)
seq_printf(m, "\"");
}
+static const char *cb_state2str(int state)
+{
+ switch (state) {
+ case NFSD4_CB_UP:
+ return "UP";
+ case NFSD4_CB_UNKNOWN:
+ return "UNKNOWN";
+ case NFSD4_CB_DOWN:
+ return "DOWN";
+ case NFSD4_CB_FAULT:
+ return "FAULT";
+ }
+ return "UNDEFINED";
+}
+
static int client_info_show(struct seq_file *m, void *v)
{
- struct inode *inode = m->private;
+ struct inode *inode = file_inode(m->file);
struct nfs4_client *clp;
u64 clid;
@@ -2370,6 +2520,17 @@ static int client_info_show(struct seq_file *m, void *v)
memcpy(&clid, &clp->cl_clientid, sizeof(clid));
seq_printf(m, "clientid: 0x%llx\n", clid);
seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
+
+ if (clp->cl_state == NFSD4_COURTESY)
+ seq_puts(m, "status: courtesy\n");
+ else if (clp->cl_state == NFSD4_EXPIRABLE)
+ seq_puts(m, "status: expirable\n");
+ else if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags))
+ seq_puts(m, "status: confirmed\n");
+ else
+ seq_puts(m, "status: unconfirmed\n");
+ seq_printf(m, "seconds from last renew: %lld\n",
+ ktime_get_boottime_seconds() - clp->cl_time);
seq_printf(m, "name: ");
seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
@@ -2382,22 +2543,14 @@ static int client_info_show(struct seq_file *m, void *v)
seq_printf(m, "\nImplementation time: [%lld, %ld]\n",
clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
}
+ seq_printf(m, "callback state: %s\n", cb_state2str(clp->cl_cb_state));
+ seq_printf(m, "callback address: %pISpc\n", &clp->cl_cb_conn.cb_addr);
drop_client(clp);
return 0;
}
-static int client_info_open(struct inode *inode, struct file *file)
-{
- return single_open(file, client_info_show, inode);
-}
-
-static const struct file_operations client_info_fops = {
- .open = client_info_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(client_info);
static void *states_start(struct seq_file *s, loff_t *pos)
__acquires(&clp->cl_lock)
@@ -2440,7 +2593,7 @@ static void nfs4_show_fname(struct seq_file *s, struct nfsd_file *f)
static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f)
{
- struct inode *inode = f->nf_inode;
+ struct inode *inode = file_inode(f->nf_file);
seq_printf(s, "superblock: \"%02x:%02x:%ld\"",
MAJOR(inode->i_sb->s_dev),
@@ -2668,6 +2821,8 @@ static void force_expire_client(struct nfs4_client *clp)
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
bool already_expired;
+ trace_nfsd_clid_admin_expired(&clp->cl_clientid);
+
spin_lock(&nn->client_lock);
clp->cl_time = 0;
spin_unlock(&nn->client_lock);
@@ -2716,6 +2871,36 @@ static const struct tree_descr client_files[] = {
[3] = {""},
};
+static int
+nfsd4_cb_recall_any_done(struct nfsd4_callback *cb,
+ struct rpc_task *task)
+{
+ switch (task->tk_status) {
+ case -NFS4ERR_DELAY:
+ rpc_delay(task, 2 * HZ);
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+static void
+nfsd4_cb_recall_any_release(struct nfsd4_callback *cb)
+{
+ struct nfs4_client *clp = cb->cb_clp;
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ spin_lock(&nn->client_lock);
+ clear_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);
+ put_client_renew_locked(clp);
+ spin_unlock(&nn->client_lock);
+}
+
+static const struct nfsd4_callback_ops nfsd4_cb_recall_any_ops = {
+ .done = nfsd4_cb_recall_any_done,
+ .release = nfsd4_cb_recall_any_release,
+};
+
static struct nfs4_client *create_client(struct xdr_netobj name,
struct svc_rqst *rqstp, nfs4_verifier *verf)
{
@@ -2724,8 +2909,9 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
int ret;
struct net *net = SVC_NET(rqstp);
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct dentry *dentries[ARRAY_SIZE(client_files)];
- clp = alloc_client(name);
+ clp = alloc_client(name, nn);
if (clp == NULL)
return NULL;
@@ -2743,13 +2929,23 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
clp->cl_cb_session = NULL;
clp->net = net;
- clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,
- clp->cl_clientid.cl_id - nn->clientid_base,
- client_files);
+ clp->cl_nfsd_dentry = nfsd_client_mkdir(
+ nn, &clp->cl_nfsdfs,
+ clp->cl_clientid.cl_id - nn->clientid_base,
+ client_files, dentries);
+ clp->cl_nfsd_info_dentry = dentries[0];
if (!clp->cl_nfsd_dentry) {
free_client(clp);
return NULL;
}
+ clp->cl_ra = kzalloc(sizeof(*clp->cl_ra), GFP_KERNEL);
+ if (!clp->cl_ra) {
+ free_client(clp);
+ return NULL;
+ }
+ clp->cl_ra_time = 0;
+ nfsd4_init_cb(&clp->cl_ra->ra_cb, clp, &nfsd4_cb_recall_any_ops,
+ NFSPROC4_CLNT_CB_RECALL_ANY);
return clp;
}
@@ -2816,11 +3012,11 @@ move_to_confirmed(struct nfs4_client *clp)
lockdep_assert_held(&nn->client_lock);
- dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp);
list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]);
rb_erase(&clp->cl_namenode, &nn->unconf_name_tree);
add_clp_to_name_tree(clp, &nn->conf_name_tree);
set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags);
+ trace_nfsd_clid_confirmed(&clp->cl_clientid);
renew_client_locked(clp);
}
@@ -2925,7 +3121,7 @@ gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_r
static void
nfsd4_store_cache_entry(struct nfsd4_compoundres *resp)
{
- struct xdr_buf *buf = resp->xdr.buf;
+ struct xdr_buf *buf = resp->xdr->buf;
struct nfsd4_slot *slot = resp->cstate.slot;
unsigned int base;
@@ -2995,7 +3191,7 @@ nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp,
struct nfsd4_sequence *seq)
{
struct nfsd4_slot *slot = resp->cstate.slot;
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
__be32 status;
@@ -3089,7 +3285,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
rpc_ntop(sa, addr_str, sizeof(addr_str));
dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
- "ip_addr=%s flags %x, spa_how %d\n",
+ "ip_addr=%s flags %x, spa_how %u\n",
__func__, rqstp, exid, exid->clname.len, exid->clname.data,
addr_str, exid->flags, exid->spa_how);
@@ -3136,6 +3332,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out_nolock;
}
new->cl_mach_cred = true;
+ break;
case SP4_NONE:
break;
default: /* checked by xdr code */
@@ -3172,20 +3369,24 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
}
/* case 6 */
exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
+ trace_nfsd_clid_confirmed_r(conf);
goto out_copy;
}
if (!creds_match) { /* case 3 */
if (client_has_state(conf)) {
status = nfserr_clid_inuse;
+ trace_nfsd_clid_cred_mismatch(conf, rqstp);
goto out;
}
goto out_new;
}
if (verfs_match) { /* case 2 */
conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
+ trace_nfsd_clid_confirmed_r(conf);
goto out_copy;
}
/* case 5, client reboot */
+ trace_nfsd_clid_verf_mismatch(conf, rqstp, &verf);
conf = NULL;
goto out_new;
}
@@ -3195,16 +3396,19 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
- unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
+ unconf = find_unconfirmed_client_by_name(&exid->clname, nn);
if (unconf) /* case 4, possible retry or client restart */
unhash_client_locked(unconf);
- /* case 1 (normal case) */
+ /* case 1, new owner ID */
+ trace_nfsd_clid_fresh(new);
+
out_new:
if (conf) {
status = mark_client_expired_locked(conf);
if (status)
goto out;
+ trace_nfsd_clid_replaced(&conf->cl_clientid);
}
new->cl_minorversion = cstate->minorversion;
new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
@@ -3228,8 +3432,10 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
out_nolock:
if (new)
expire_client(new);
- if (unconf)
+ if (unconf) {
+ trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
expire_client(unconf);
+ }
return status;
}
@@ -3421,9 +3627,10 @@ nfsd4_create_session(struct svc_rqst *rqstp,
goto out_free_conn;
}
} else if (unconf) {
+ status = nfserr_clid_inuse;
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) ||
!rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) {
- status = nfserr_clid_inuse;
+ trace_nfsd_clid_cred_mismatch(unconf, rqstp);
goto out_free_conn;
}
status = nfserr_wrong_cred;
@@ -3443,6 +3650,7 @@ nfsd4_create_session(struct svc_rqst *rqstp,
old = NULL;
goto out_free_conn;
}
+ trace_nfsd_clid_replaced(&old->cl_clientid);
}
move_to_confirmed(unconf);
conf = unconf;
@@ -3467,6 +3675,8 @@ nfsd4_create_session(struct svc_rqst *rqstp,
/* cache solo and embedded create sessions under the client_lock */
nfsd4_cache_create_session(cr_ses, cs_slot, status);
spin_unlock(&nn->client_lock);
+ if (conf == unconf)
+ fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);
/* init connection and backchannel */
nfsd4_init_conn(rqstp, conn, new);
nfsd4_put_session(new);
@@ -3740,7 +3950,7 @@ nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
{
struct nfsd4_sequence *seq = &u->sequence;
struct nfsd4_compoundres *resp = rqstp->rq_resp;
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
struct nfsd4_session *session;
struct nfs4_client *clp;
struct nfsd4_slot *slot;
@@ -3910,6 +4120,7 @@ nfsd4_destroy_clientid(struct svc_rqst *rqstp,
status = nfserr_wrong_cred;
goto out;
}
+ trace_nfsd_clid_destroyed(&clp->cl_clientid);
unhash_client_locked(clp);
out:
spin_unlock(&nn->client_lock);
@@ -3923,6 +4134,7 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
{
struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
+ struct nfs4_client *clp = cstate->clp;
__be32 status = 0;
if (rc->rca_one_fs) {
@@ -3936,12 +4148,11 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp,
}
status = nfserr_complete_already;
- if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
- &cstate->session->se_client->cl_flags))
+ if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))
goto out;
status = nfserr_stale_clientid;
- if (is_client_expired(cstate->session->se_client))
+ if (is_client_expired(clp))
/*
* The following error isn't really legal.
* But we only get here if the client just explicitly
@@ -3952,8 +4163,9 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp,
goto out;
status = nfs_ok;
- nfsd4_client_record_create(cstate->session->se_client);
- inc_reclaim_complete(cstate->session->se_client);
+ trace_nfsd_clid_reclaim_complete(&clp->cl_clientid);
+ nfsd4_client_record_create(clp);
+ inc_reclaim_complete(clp);
out:
return status;
}
@@ -3973,27 +4185,29 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
new = create_client(clname, rqstp, &clverifier);
if (new == NULL)
return nfserr_jukebox;
- /* Cases below refer to rfc 3530 section 14.2.33: */
spin_lock(&nn->client_lock);
conf = find_confirmed_client_by_name(&clname, nn);
if (conf && client_has_state(conf)) {
- /* case 0: */
status = nfserr_clid_inuse;
if (clp_used_exchangeid(conf))
goto out;
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
- trace_nfsd_clid_inuse_err(conf);
+ trace_nfsd_clid_cred_mismatch(conf, rqstp);
goto out;
}
}
unconf = find_unconfirmed_client_by_name(&clname, nn);
if (unconf)
unhash_client_locked(unconf);
- /* We need to handle only case 1: probable callback update */
- if (conf && same_verf(&conf->cl_verifier, &clverifier)) {
- copy_clid(new, conf);
- gen_confirm(new, nn);
- }
+ if (conf) {
+ if (same_verf(&conf->cl_verifier, &clverifier)) {
+ copy_clid(new, conf);
+ gen_confirm(new, nn);
+ } else
+ trace_nfsd_clid_verf_mismatch(conf, rqstp,
+ &clverifier);
+ } else
+ trace_nfsd_clid_fresh(new);
new->cl_minorversion = 0;
gen_callback(new, setclid, rqstp);
add_to_unconfirmed(new);
@@ -4006,12 +4220,13 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
spin_unlock(&nn->client_lock);
if (new)
free_client(new);
- if (unconf)
+ if (unconf) {
+ trace_nfsd_clid_expire_unconf(&unconf->cl_clientid);
expire_client(unconf);
+ }
return status;
}
-
__be32
nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
@@ -4040,25 +4255,27 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
* Nevertheless, RFC 7530 recommends INUSE for this case:
*/
status = nfserr_clid_inuse;
- if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
+ if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
+ trace_nfsd_clid_cred_mismatch(unconf, rqstp);
goto out;
- if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
+ }
+ if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
+ trace_nfsd_clid_cred_mismatch(conf, rqstp);
goto out;
- /* cases below refer to rfc 3530 section 14.2.34: */
+ }
if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
if (conf && same_verf(&confirm, &conf->cl_confirm)) {
- /* case 2: probable retransmit */
status = nfs_ok;
- } else /* case 4: client hasn't noticed we rebooted yet? */
+ } else
status = nfserr_stale_clientid;
goto out;
}
status = nfs_ok;
- if (conf) { /* case 1: callback update */
+ if (conf) {
old = unconf;
unhash_client_locked(old);
nfsd4_change_callback(conf, &unconf->cl_cb_conn);
- } else { /* case 3: normal case; new or rebooted client */
+ } else {
old = find_confirmed_client_by_name(&unconf->cl_name, nn);
if (old) {
status = nfserr_clid_inuse;
@@ -4073,12 +4290,15 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
old = NULL;
goto out;
}
+ trace_nfsd_clid_replaced(&old->cl_clientid);
}
move_to_confirmed(unconf);
conf = unconf;
}
get_client_locked(conf);
spin_unlock(&nn->client_lock);
+ if (conf == unconf)
+ fsnotify_dentry(conf->cl_nfsd_info_dentry, FS_MODIFY);
nfsd4_probe_callback(conf);
spin_lock(&nn->client_lock);
put_client_renew_locked(conf);
@@ -4095,27 +4315,26 @@ static struct nfs4_file *nfsd4_alloc_file(void)
}
/* OPEN Share state helper functions */
-static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval,
- struct nfs4_file *fp)
-{
- lockdep_assert_held(&state_lock);
+static void nfsd4_file_init(const struct svc_fh *fh, struct nfs4_file *fp)
+{
refcount_set(&fp->fi_ref, 1);
spin_lock_init(&fp->fi_lock);
INIT_LIST_HEAD(&fp->fi_stateids);
INIT_LIST_HEAD(&fp->fi_delegations);
INIT_LIST_HEAD(&fp->fi_clnt_odstate);
- fh_copy_shallow(&fp->fi_fhandle, fh);
+ fh_copy_shallow(&fp->fi_fhandle, &fh->fh_handle);
fp->fi_deleg_file = NULL;
fp->fi_had_conflict = false;
fp->fi_share_deny = 0;
memset(fp->fi_fds, 0, sizeof(fp->fi_fds));
memset(fp->fi_access, 0, sizeof(fp->fi_access));
+ fp->fi_aliased = false;
+ fp->fi_inode = d_inode(fh->fh_dentry);
#ifdef CONFIG_NFSD_PNFS
INIT_LIST_HEAD(&fp->fi_lo_states);
atomic_set(&fp->fi_lo_recalls, 0);
#endif
- hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]);
}
void
@@ -4179,6 +4398,51 @@ nfsd4_init_slabs(void)
return -ENOMEM;
}
+static unsigned long
+nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+ int count;
+ struct nfsd_net *nn = container_of(shrink,
+ struct nfsd_net, nfsd_client_shrinker);
+
+ count = atomic_read(&nn->nfsd_courtesy_clients);
+ if (!count)
+ count = atomic_long_read(&num_delegations);
+ if (count)
+ queue_work(laundry_wq, &nn->nfsd_shrinker_work);
+ return (unsigned long)count;
+}
+
+static unsigned long
+nfsd4_state_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc)
+{
+ return SHRINK_STOP;
+}
+
+void
+nfsd4_init_leases_net(struct nfsd_net *nn)
+{
+ struct sysinfo si;
+ u64 max_clients;
+
+ nn->nfsd4_lease = 90; /* default lease time */
+ nn->nfsd4_grace = 90;
+ nn->somebody_reclaimed = false;
+ nn->track_reclaim_completes = false;
+ nn->clverifier_counter = prandom_u32();
+ nn->clientid_base = prandom_u32();
+ nn->clientid_counter = nn->clientid_base + 1;
+ nn->s2s_cp_cl_id = nn->clientid_counter++;
+
+ atomic_set(&nn->nfs4_client_count, 0);
+ si_meminfo(&si);
+ max_clients = (u64)si.totalram * si.mem_unit / (1024 * 1024 * 1024);
+ max_clients *= NFS4_CLIENTS_PER_GB;
+ nn->nfs4_max_clients = max_t(int, max_clients, NFS4_CLIENTS_PER_GB);
+
+ atomic_set(&nn->nfsd_courtesy_clients, 0);
+}
+
static void init_nfs4_replay(struct nfs4_replay *rp)
{
rp->rp_status = nfserr_serverfault;
@@ -4447,55 +4711,80 @@ move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net)
nfs4_put_stid(&last->st_stid);
}
-/* search file_hashtbl[] for file */
-static struct nfs4_file *
-find_file_locked(struct knfsd_fh *fh, unsigned int hashval)
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_lookup(const struct svc_fh *fhp)
{
- struct nfs4_file *fp;
+ struct inode *inode = d_inode(fhp->fh_dentry);
+ struct rhlist_head *tmp, *list;
+ struct nfs4_file *fi;
- hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash,
- lockdep_is_held(&state_lock)) {
- if (fh_match(&fp->fi_fhandle, fh)) {
- if (refcount_inc_not_zero(&fp->fi_ref))
- return fp;
+ rcu_read_lock();
+ list = rhltable_lookup(&nfs4_file_rhltable, &inode,
+ nfs4_file_rhash_params);
+ rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref)) {
+ rcu_read_unlock();
+ return fi;
+ }
}
}
+ rcu_read_unlock();
return NULL;
}
-struct nfs4_file *
-find_file(struct knfsd_fh *fh)
-{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
+/*
+ * On hash insertion, identify entries with the same inode but
+ * distinct filehandles. They will all be on the list returned
+ * by rhltable_lookup().
+ *
+ * inode->i_lock prevents racing insertions from adding an entry
+ * for the same inode/fhp pair twice.
+ */
+static noinline_for_stack struct nfs4_file *
+nfsd4_file_hash_insert(struct nfs4_file *new, const struct svc_fh *fhp)
+{
+ struct inode *inode = d_inode(fhp->fh_dentry);
+ struct rhlist_head *tmp, *list;
+ struct nfs4_file *ret = NULL;
+ bool alias_found = false;
+ struct nfs4_file *fi;
+ int err;
rcu_read_lock();
- fp = find_file_locked(fh, hashval);
- rcu_read_unlock();
- return fp;
-}
+ spin_lock(&inode->i_lock);
-static struct nfs4_file *
-find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh)
-{
- struct nfs4_file *fp;
- unsigned int hashval = file_hashval(fh);
+ list = rhltable_lookup(&nfs4_file_rhltable, &inode,
+ nfs4_file_rhash_params);
+ rhl_for_each_entry_rcu(fi, tmp, list, fi_rlist) {
+ if (fh_match(&fi->fi_fhandle, &fhp->fh_handle)) {
+ if (refcount_inc_not_zero(&fi->fi_ref))
+ ret = fi;
+ } else
+ fi->fi_aliased = alias_found = true;
+ }
+ if (ret)
+ goto out_unlock;
- rcu_read_lock();
- fp = find_file_locked(fh, hashval);
- rcu_read_unlock();
- if (fp)
- return fp;
+ nfsd4_file_init(fhp, new);
+ err = rhltable_insert(&nfs4_file_rhltable, &new->fi_rlist,
+ nfs4_file_rhash_params);
+ if (err)
+ goto out_unlock;
- spin_lock(&state_lock);
- fp = find_file_locked(fh, hashval);
- if (likely(fp == NULL)) {
- nfsd4_init_file(fh, hashval, new);
- fp = new;
- }
- spin_unlock(&state_lock);
+ new->fi_aliased = alias_found;
+ ret = new;
- return fp;
+out_unlock:
+ spin_unlock(&inode->i_lock);
+ rcu_read_unlock();
+ return ret;
+}
+
+static noinline_for_stack void nfsd4_file_hash_remove(struct nfs4_file *fi)
+{
+ rhltable_remove(&nfs4_file_rhltable, &fi->fi_rlist,
+ nfs4_file_rhash_params);
}
/*
@@ -4508,9 +4797,10 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
struct nfs4_file *fp;
__be32 ret = nfs_ok;
- fp = find_file(¤t_fh->fh_handle);
+ fp = nfsd4_file_hash_lookup(current_fh);
if (!fp)
return ret;
+
/* Check for conflicting share reservations */
spin_lock(&fp->fi_lock);
if (fp->fi_share_deny & deny_type)
@@ -4520,6 +4810,35 @@ nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type)
return ret;
}
+static bool nfsd4_deleg_present(const struct inode *inode)
+{
+ struct file_lock_context *ctx = locks_inode_context(inode);
+
+ return ctx && !list_empty_careful(&ctx->flc_lease);
+}
+
+/**
+ * nfsd_wait_for_delegreturn - wait for delegations to be returned
+ * @rqstp: the RPC transaction being executed
+ * @inode: in-core inode of the file being waited for
+ *
+ * The timeout prevents deadlock if all nfsd threads happen to be
+ * tied up waiting for returning delegations.
+ *
+ * Return values:
+ * %true: delegation was returned
+ * %false: timed out waiting for delegreturn
+ */
+bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode)
+{
+ long __maybe_unused timeo;
+
+ timeo = wait_var_event_timeout(inode, !nfsd4_deleg_present(inode),
+ NFSD_DELEGRETURN_TIMEOUT);
+ trace_nfsd_delegret_wakeup(rqstp, inode, timeo);
+ return timeo > 0;
+}
+
static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb)
{
struct nfs4_delegation *dp = cb_to_delegation(cb);
@@ -4548,6 +4867,8 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
{
struct nfs4_delegation *dp = cb_to_delegation(cb);
+ trace_nfsd_cb_recall_done(&dp->dl_stid.sc_stateid, task);
+
if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID ||
dp->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID)
return 1;
@@ -4593,22 +4914,30 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
* We're assuming the state code never drops its reference
* without first removing the lease. Since we're in this lease
* callback (and since the lease code is serialized by the
- * i_lock) we know the server hasn't removed the lease yet, and
+ * flc_lock) we know the server hasn't removed the lease yet, and
* we know it's safe to take a reference.
*/
refcount_inc(&dp->dl_stid.sc_count);
- nfsd4_run_cb(&dp->dl_recall);
+ WARN_ON_ONCE(!nfsd4_run_cb(&dp->dl_recall));
}
-/* Called from break_lease() with i_lock held. */
+/* Called from break_lease() with flc_lock held. */
static bool
nfsd_break_deleg_cb(struct file_lock *fl)
{
- bool ret = false;
struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner;
struct nfs4_file *fp = dp->dl_stid.sc_file;
+ struct nfs4_client *clp = dp->dl_stid.sc_client;
+ struct nfsd_net *nn;
+
+ trace_nfsd_cb_recall(&dp->dl_stid);
- trace_nfsd_deleg_break(&dp->dl_stid.sc_stateid);
+ dp->dl_recalled = true;
+ atomic_inc(&clp->cl_delegs_in_recall);
+ if (try_to_expire_client(clp)) {
+ nn = net_generic(clp->net, nfsd_net_id);
+ mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);
+ }
/*
* We don't want the locks code to timeout the lease for us;
@@ -4617,11 +4946,9 @@ nfsd_break_deleg_cb(struct file_lock *fl)
*/
fl->fl_break_time = 0;
- spin_lock(&fp->fi_lock);
fp->fi_had_conflict = true;
nfsd_break_one_deleg(dp);
- spin_unlock(&fp->fi_lock);
- return ret;
+ return false;
}
/**
@@ -4652,9 +4979,14 @@ static int
nfsd_change_deleg_cb(struct file_lock *onlist, int arg,
struct list_head *dispose)
{
- if (arg & F_UNLCK)
+ struct nfs4_delegation *dp = (struct nfs4_delegation *)onlist->fl_owner;
+ struct nfs4_client *clp = dp->dl_stid.sc_client;
+
+ if (arg & F_UNLCK) {
+ if (dp->dl_recalled)
+ atomic_dec(&clp->cl_delegs_in_recall);
return lease_modify(onlist, arg, dispose);
- else
+ } else
return -EAGAIN;
}
@@ -4675,40 +5007,37 @@ static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4
return nfserr_bad_seqid;
}
-static __be32 lookup_clientid(clientid_t *clid,
- struct nfsd4_compound_state *cstate,
- struct nfsd_net *nn,
- bool sessions)
+static struct nfs4_client *lookup_clientid(clientid_t *clid, bool sessions,
+ struct nfsd_net *nn)
{
struct nfs4_client *found;
+ spin_lock(&nn->client_lock);
+ found = find_confirmed_client(clid, sessions, nn);
+ if (found)
+ atomic_inc(&found->cl_rpc_users);
+ spin_unlock(&nn->client_lock);
+ return found;
+}
+
+static __be32 set_client(clientid_t *clid,
+ struct nfsd4_compound_state *cstate,
+ struct nfsd_net *nn)
+{
if (cstate->clp) {
- found = cstate->clp;
- if (!same_clid(&found->cl_clientid, clid))
+ if (!same_clid(&cstate->clp->cl_clientid, clid))
return nfserr_stale_clientid;
return nfs_ok;
}
-
if (STALE_CLIENTID(clid, nn))
return nfserr_stale_clientid;
-
/*
- * For v4.1+ we get the client in the SEQUENCE op. If we don't have one
- * cached already then we know this is for is for v4.0 and "sessions"
- * will be false.
+ * We're in the 4.0 case (otherwise the SEQUENCE op would have
+ * set cstate->clp), so session = false:
*/
- WARN_ON_ONCE(cstate->session);
- spin_lock(&nn->client_lock);
- found = find_confirmed_client(clid, sessions, nn);
- if (!found) {
- spin_unlock(&nn->client_lock);
+ cstate->clp = lookup_clientid(clid, false, nn);
+ if (!cstate->clp)
return nfserr_expired;
- }
- atomic_inc(&found->cl_rpc_users);
- spin_unlock(&nn->client_lock);
-
- /* Cache the nfs4_client in cstate! */
- cstate->clp = found;
return nfs_ok;
}
@@ -4722,8 +5051,6 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
struct nfs4_openowner *oo = NULL;
__be32 status;
- if (STALE_CLIENTID(&open->op_clientid, nn))
- return nfserr_stale_clientid;
/*
* In case we need it later, after we've already created the
* file and don't want to risk a further failure:
@@ -4732,7 +5059,7 @@ nfsd4_process_open1(struct nfsd4_compound_state *cstate,
if (open->op_file == NULL)
return nfserr_jukebox;
- status = lookup_clientid(clientid, cstate, nn, false);
+ status = set_client(clientid, cstate, nn);
if (status)
return status;
clp = cstate->clp;
@@ -4856,16 +5183,19 @@ nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh,
.ia_valid = ATTR_SIZE,
.ia_size = 0,
};
+ struct nfsd_attrs attrs = {
+ .na_iattr = &iattr,
+ };
if (!open->op_truncate)
return 0;
if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
return nfserr_inval;
- return nfsd_setattr(rqstp, fh, &iattr, 0, (time64_t)0);
+ return nfsd_setattr(rqstp, fh, &attrs, 0, (time64_t)0);
}
static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
- struct nfsd4_open *open)
+ struct nfsd4_open *open, bool new_stp)
{
struct nfsd_file *nf = NULL;
__be32 status;
@@ -4881,6 +5211,13 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
*/
status = nfs4_file_check_deny(fp, open->op_share_deny);
if (status != nfs_ok) {
+ if (status != nfserr_share_denied) {
+ spin_unlock(&fp->fi_lock);
+ goto out;
+ }
+ if (nfs4_resolve_deny_conflicts_locked(fp, new_stp,
+ stp, open->op_share_deny, false))
+ status = nfserr_jukebox;
spin_unlock(&fp->fi_lock);
goto out;
}
@@ -4888,6 +5225,13 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
/* set access to the file */
status = nfs4_file_get_access(fp, open->op_share_access);
if (status != nfs_ok) {
+ if (status != nfserr_share_denied) {
+ spin_unlock(&fp->fi_lock);
+ goto out;
+ }
+ if (nfs4_resolve_deny_conflicts_locked(fp, new_stp,
+ stp, open->op_share_access, true))
+ status = nfserr_jukebox;
spin_unlock(&fp->fi_lock);
goto out;
}
@@ -4903,9 +5247,12 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
if (!fp->fi_fds[oflag]) {
spin_unlock(&fp->fi_lock);
- status = nfsd_file_acquire(rqstp, cur_fh, access, &nf);
- if (status)
+
+ status = nfsd_file_acquire_opened(rqstp, cur_fh, access,
+ open->op_filp, &nf);
+ if (status != nfs_ok)
goto out_put_access;
+
spin_lock(&fp->fi_lock);
if (!fp->fi_fds[oflag]) {
fp->fi_fds[oflag] = nf;
@@ -4934,21 +5281,30 @@ static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp,
}
static __be32
-nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open)
+nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp,
+ struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp,
+ struct nfsd4_open *open)
{
__be32 status;
unsigned char old_deny_bmap = stp->st_deny_bmap;
if (!test_access(open->op_share_access, stp))
- return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open);
+ return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open, false);
/* test and set deny mode */
spin_lock(&fp->fi_lock);
status = nfs4_file_check_deny(fp, open->op_share_deny);
- if (status == nfs_ok) {
+ switch (status) {
+ case nfs_ok:
set_deny(open->op_share_deny, stp);
fp->fi_share_deny |=
- (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
+ (open->op_share_deny & NFS4_SHARE_DENY_BOTH);
+ break;
+ case nfserr_share_denied:
+ if (nfs4_resolve_deny_conflicts_locked(fp, false,
+ stp, open->op_share_deny, false))
+ status = nfserr_jukebox;
+ break;
}
spin_unlock(&fp->fi_lock);
@@ -4992,11 +5348,118 @@ static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp,
return fl;
}
+static int nfsd4_check_conflicting_opens(struct nfs4_client *clp,
+ struct nfs4_file *fp)
+{
+ struct nfs4_ol_stateid *st;
+ struct file *f = fp->fi_deleg_file->nf_file;
+ struct inode *ino = locks_inode(f);
+ int writes;
+
+ writes = atomic_read(&ino->i_writecount);
+ if (!writes)
+ return 0;
+ /*
+ * There could be multiple filehandles (hence multiple
+ * nfs4_files) referencing this file, but that's not too
+ * common; let's just give up in that case rather than
+ * trying to go look up all the clients using that other
+ * nfs4_file as well:
+ */
+ if (fp->fi_aliased)
+ return -EAGAIN;
+ /*
+ * If there's a close in progress, make sure that we see it
+ * clear any fi_fds[] entries before we see it decrement
+ * i_writecount:
+ */
+ smp_mb__after_atomic();
+
+ if (fp->fi_fds[O_WRONLY])
+ writes--;
+ if (fp->fi_fds[O_RDWR])
+ writes--;
+ if (writes > 0)
+ return -EAGAIN; /* There may be non-NFSv4 writers */
+ /*
+ * It's possible there are non-NFSv4 write opens in progress,
+ * but if they haven't incremented i_writecount yet then they
+ * also haven't called break lease yet; so, they'll break this
+ * lease soon enough. So, all that's left to check for is NFSv4
+ * opens:
+ */
+ spin_lock(&fp->fi_lock);
+ list_for_each_entry(st, &fp->fi_stateids, st_perfile) {
+ if (st->st_openstp == NULL /* it's an open */ &&
+ access_permit_write(st) &&
+ st->st_stid.sc_client != clp) {
+ spin_unlock(&fp->fi_lock);
+ return -EAGAIN;
+ }
+ }
+ spin_unlock(&fp->fi_lock);
+ /*
+ * There's a small chance that we could be racing with another
+ * NFSv4 open. However, any open that hasn't added itself to
+ * the fi_stateids list also hasn't called break_lease yet; so,
+ * they'll break this lease soon enough.
+ */
+ return 0;
+}
+
+/*
+ * It's possible that between opening the dentry and setting the delegation,
+ * that it has been renamed or unlinked. Redo the lookup to verify that this
+ * hasn't happened.
+ */
+static int
+nfsd4_verify_deleg_dentry(struct nfsd4_open *open, struct nfs4_file *fp,
+ struct svc_fh *parent)
+{
+ struct svc_export *exp;
+ struct dentry *child;
+ __be32 err;
+
+ err = nfsd_lookup_dentry(open->op_rqstp, parent,
+ open->op_fname, open->op_fnamelen,
+ &exp, &child);
+
+ if (err)
+ return -EAGAIN;
+
+ exp_put(exp);
+ dput(child);
+ if (child != file_dentry(fp->fi_deleg_file->nf_file))
+ return -EAGAIN;
+
+ return 0;
+}
+
+/*
+ * We avoid breaking delegations held by a client due to its own activity, but
+ * clearing setuid/setgid bits on a write is an implicit activity and the client
+ * may not notice and continue using the old mode. Avoid giving out a delegation
+ * on setuid/setgid files when the client is requesting an open for write.
+ */
+static int
+nfsd4_verify_setuid_write(struct nfsd4_open *open, struct nfsd_file *nf)
+{
+ struct inode *inode = file_inode(nf->nf_file);
+
+ if ((open->op_share_access & NFS4_SHARE_ACCESS_WRITE) &&
+ (inode->i_mode & (S_ISUID|S_ISGID)))
+ return -EAGAIN;
+ return 0;
+}
+
static struct nfs4_delegation *
-nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
- struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate)
+nfs4_set_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
+ struct svc_fh *parent)
{
int status = 0;
+ struct nfs4_client *clp = stp->st_stid.sc_client;
+ struct nfs4_file *fp = stp->st_stid.sc_file;
+ struct nfs4_clnt_odstate *odstate = stp->st_clnt_odstate;
struct nfs4_delegation *dp;
struct nfsd_file *nf;
struct file_lock *fl;
@@ -5011,14 +5474,19 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
nf = find_readable_file(fp);
if (!nf) {
- /* We should always have a readable file here */
- WARN_ON_ONCE(1);
- return ERR_PTR(-EBADF);
+ /*
+ * We probably could attempt another open and get a read
+ * delegation, but for now, don't bother until the
+ * client actually sends us one.
+ */
+ return ERR_PTR(-EAGAIN);
}
spin_lock(&state_lock);
spin_lock(&fp->fi_lock);
if (nfs4_delegation_exists(clp, fp))
status = -EAGAIN;
+ else if (nfsd4_verify_setuid_write(open, nf))
+ status = -EAGAIN;
else if (!fp->fi_deleg_file) {
fp->fi_deleg_file = nf;
/* increment early to prevent fi_deleg_file from being
@@ -5035,7 +5503,7 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
return ERR_PTR(status);
status = -ENOMEM;
- dp = alloc_init_deleg(clp, fp, fh, odstate);
+ dp = alloc_init_deleg(clp, fp, odstate);
if (!dp)
goto out_delegees;
@@ -5049,12 +5517,31 @@ nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh,
if (status)
goto out_clnt_odstate;
+ if (parent) {
+ status = nfsd4_verify_deleg_dentry(open, fp, parent);
+ if (status)
+ goto out_unlock;
+ }
+
+ status = nfsd4_check_conflicting_opens(clp, fp);
+ if (status)
+ goto out_unlock;
+
+ /*
+ * Now that the deleg is set, check again to ensure that nothing
+ * raced in and changed the mode while we weren't lookng.
+ */
+ status = nfsd4_verify_setuid_write(open, fp->fi_deleg_file);
+ if (status)
+ goto out_unlock;
+
+ status = -EAGAIN;
+ if (fp->fi_had_conflict)
+ goto out_unlock;
+
spin_lock(&state_lock);
spin_lock(&fp->fi_lock);
- if (fp->fi_had_conflict)
- status = -EAGAIN;
- else
- status = hash_delegation_locked(dp, fp);
+ status = hash_delegation_locked(dp, fp);
spin_unlock(&fp->fi_lock);
spin_unlock(&state_lock);
@@ -5100,12 +5587,13 @@ static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status)
* proper support for them.
*/
static void
-nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
- struct nfs4_ol_stateid *stp)
+nfs4_open_delegation(struct nfsd4_open *open, struct nfs4_ol_stateid *stp,
+ struct svc_fh *currentfh)
{
struct nfs4_delegation *dp;
struct nfs4_openowner *oo = openowner(stp->st_stateowner);
struct nfs4_client *clp = stp->st_stid.sc_client;
+ struct svc_fh *parent = NULL;
int cb_up;
int status = 0;
@@ -5119,6 +5607,8 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
goto out_no_deleg;
break;
case NFS4_OPEN_CLAIM_NULL:
+ parent = currentfh;
+ fallthrough;
case NFS4_OPEN_CLAIM_FH:
/*
* Let's not give out any delegations till everyone's
@@ -5129,22 +5619,11 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open,
goto out_no_deleg;
if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED))
goto out_no_deleg;
- /*
- * Also, if the file was opened for write or
- * create, there's a good chance the client's
- * about to write to it, resulting in an
- * immediate recall (since we don't support
- * write delegations):
- */
- if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
- goto out_no_deleg;
- if (open->op_create == NFS4_OPEN_CREATE)
- goto out_no_deleg;
break;
default:
goto out_no_deleg;
}
- dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate);
+ dp = nfs4_set_delegation(open, stp, parent);
if (IS_ERR(dp))
goto out_no_deleg;
@@ -5186,6 +5665,18 @@ static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open,
*/
}
+/**
+ * nfsd4_process_open2 - finish open processing
+ * @rqstp: the RPC transaction being executed
+ * @current_fh: NFSv4 COMPOUND's current filehandle
+ * @open: OPEN arguments
+ *
+ * If successful, (1) truncate the file if open->op_truncate was
+ * set, (2) set open->op_stateid, (3) set open->op_delegation.
+ *
+ * Returns %nfs_ok on success; otherwise an nfs4stat value in
+ * network byte order is returned.
+ */
__be32
nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
{
@@ -5202,7 +5693,9 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
* and check for delegations in the process of being recalled.
* If not found, create the nfs4_file struct
*/
- fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle);
+ fp = nfsd4_file_hash_insert(open->op_file, current_fh);
+ if (unlikely(!fp))
+ return nfserr_jukebox;
if (fp != open->op_file) {
status = nfs4_check_deleg(cl, open, &dp);
if (status)
@@ -5235,7 +5728,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
goto out;
}
} else {
- status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open);
+ status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open, true);
if (status) {
stp->st_stid.sc_type = NFS4_CLOSED_STID;
release_open_stateid(stp);
@@ -5264,7 +5757,7 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
* Attempt to hand out a delegation. No error return, because the
* OPEN succeeds even if we fail.
*/
- nfs4_open_delegation(current_fh, open, stp);
+ nfs4_open_delegation(open, stp, &resp->cstate.current_fh);
nodeleg:
status = nfs_ok;
trace_nfsd_open(&stp->st_stid.sc_stateid);
@@ -5322,137 +5815,313 @@ nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
trace_nfsd_clid_renew(clid);
- status = lookup_clientid(clid, cstate, nn, false);
+ status = set_client(clid, cstate, nn);
if (status)
- goto out;
+ return status;
clp = cstate->clp;
- status = nfserr_cb_path_down;
if (!list_empty(&clp->cl_delegations)
&& clp->cl_cb_state != NFSD4_CB_UP)
- goto out;
- status = nfs_ok;
-out:
- return status;
+ return nfserr_cb_path_down;
+ return nfs_ok;
+}
+
+void
+nfsd4_end_grace(struct nfsd_net *nn)
+{
+ /* do nothing if grace period already ended */
+ if (nn->grace_ended)
+ return;
+
+ trace_nfsd_grace_complete(nn);
+ nn->grace_ended = true;
+ /*
+ * If the server goes down again right now, an NFSv4
+ * client will still be allowed to reclaim after it comes back up,
+ * even if it hasn't yet had a chance to reclaim state this time.
+ *
+ */
+ nfsd4_record_grace_done(nn);
+ /*
+ * At this point, NFSv4 clients can still reclaim. But if the
+ * server crashes, any that have not yet reclaimed will be out
+ * of luck on the next boot.
+ *
+ * (NFSv4.1+ clients are considered to have reclaimed once they
+ * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
+ * have reclaimed after their first OPEN.)
+ */
+ locks_end_grace(&nn->nfsd4_manager);
+ /*
+ * At this point, and once lockd and/or any other containers
+ * exit their grace period, further reclaims will fail and
+ * regular locking can resume.
+ */
+}
+
+/*
+ * If we've waited a lease period but there are still clients trying to
+ * reclaim, wait a little longer to give them a chance to finish.
+ */
+static bool clients_still_reclaiming(struct nfsd_net *nn)
+{
+ time64_t double_grace_period_end = nn->boot_time +
+ 2 * nn->nfsd4_lease;
+
+ if (nn->track_reclaim_completes &&
+ atomic_read(&nn->nr_reclaim_complete) ==
+ nn->reclaim_str_hashtbl_size)
+ return false;
+ if (!nn->somebody_reclaimed)
+ return false;
+ nn->somebody_reclaimed = false;
+ /*
+ * If we've given them *two* lease times to reclaim, and they're
+ * still not done, give up:
+ */
+ if (ktime_get_boottime_seconds() > double_grace_period_end)
+ return false;
+ return true;
+}
+
+struct laundry_time {
+ time64_t cutoff;
+ time64_t new_timeo;
+};
+
+static bool state_expired(struct laundry_time *lt, time64_t last_refresh)
+{
+ time64_t time_remaining;
+
+ if (last_refresh < lt->cutoff)
+ return true;
+ time_remaining = last_refresh - lt->cutoff;
+ lt->new_timeo = min(lt->new_timeo, time_remaining);
+ return false;
+}
+
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+void nfsd4_ssc_init_umount_work(struct nfsd_net *nn)
+{
+ spin_lock_init(&nn->nfsd_ssc_lock);
+ INIT_LIST_HEAD(&nn->nfsd_ssc_mount_list);
+ init_waitqueue_head(&nn->nfsd_ssc_waitq);
+}
+EXPORT_SYMBOL_GPL(nfsd4_ssc_init_umount_work);
+
+/*
+ * This is called when nfsd is being shutdown, after all inter_ssc
+ * cleanup were done, to destroy the ssc delayed unmount list.
+ */
+static void nfsd4_ssc_shutdown_umount(struct nfsd_net *nn)
+{
+ struct nfsd4_ssc_umount_item *ni = NULL;
+ struct nfsd4_ssc_umount_item *tmp;
+
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
+ list_del(&ni->nsui_list);
+ spin_unlock(&nn->nfsd_ssc_lock);
+ mntput(ni->nsui_vfsmount);
+ kfree(ni);
+ spin_lock(&nn->nfsd_ssc_lock);
+ }
+ spin_unlock(&nn->nfsd_ssc_lock);
+}
+
+static void nfsd4_ssc_expire_umount(struct nfsd_net *nn)
+{
+ bool do_wakeup = false;
+ struct nfsd4_ssc_umount_item *ni = NULL;
+ struct nfsd4_ssc_umount_item *tmp;
+
+ spin_lock(&nn->nfsd_ssc_lock);
+ list_for_each_entry_safe(ni, tmp, &nn->nfsd_ssc_mount_list, nsui_list) {
+ if (time_after(jiffies, ni->nsui_expire)) {
+ if (refcount_read(&ni->nsui_refcnt) > 1)
+ continue;
+
+ /* mark being unmount */
+ ni->nsui_busy = true;
+ spin_unlock(&nn->nfsd_ssc_lock);
+ mntput(ni->nsui_vfsmount);
+ spin_lock(&nn->nfsd_ssc_lock);
+
+ /* waiters need to start from begin of list */
+ list_del(&ni->nsui_list);
+ kfree(ni);
+
+ /* wakeup ssc_connect waiters */
+ do_wakeup = true;
+ continue;
+ }
+ break;
+ }
+ if (do_wakeup)
+ wake_up_all(&nn->nfsd_ssc_waitq);
+ spin_unlock(&nn->nfsd_ssc_lock);
+}
+#endif
+
+/* Check if any lock belonging to this lockowner has any blockers */
+static bool
+nfs4_lockowner_has_blockers(struct nfs4_lockowner *lo)
+{
+ struct file_lock_context *ctx;
+ struct nfs4_ol_stateid *stp;
+ struct nfs4_file *nf;
+
+ list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {
+ nf = stp->st_stid.sc_file;
+ ctx = locks_inode_context(nf->fi_inode);
+ if (!ctx)
+ continue;
+ if (locks_owner_has_blockers(ctx, lo))
+ return true;
+ }
+ return false;
+}
+
+static bool
+nfs4_anylock_blockers(struct nfs4_client *clp)
+{
+ int i;
+ struct nfs4_stateowner *so;
+ struct nfs4_lockowner *lo;
+
+ if (atomic_read(&clp->cl_delegs_in_recall))
+ return true;
+ spin_lock(&clp->cl_lock);
+ for (i = 0; i < OWNER_HASH_SIZE; i++) {
+ list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[i],
+ so_strhash) {
+ if (so->so_is_open_owner)
+ continue;
+ lo = lockowner(so);
+ if (nfs4_lockowner_has_blockers(lo)) {
+ spin_unlock(&clp->cl_lock);
+ return true;
+ }
+ }
+ }
+ spin_unlock(&clp->cl_lock);
+ return false;
}
-void
-nfsd4_end_grace(struct nfsd_net *nn)
+static void
+nfs4_get_client_reaplist(struct nfsd_net *nn, struct list_head *reaplist,
+ struct laundry_time *lt)
{
- /* do nothing if grace period already ended */
- if (nn->grace_ended)
- return;
+ unsigned int maxreap, reapcnt = 0;
+ struct list_head *pos, *next;
+ struct nfs4_client *clp;
- trace_nfsd_grace_complete(nn);
- nn->grace_ended = true;
- /*
- * If the server goes down again right now, an NFSv4
- * client will still be allowed to reclaim after it comes back up,
- * even if it hasn't yet had a chance to reclaim state this time.
- *
- */
- nfsd4_record_grace_done(nn);
- /*
- * At this point, NFSv4 clients can still reclaim. But if the
- * server crashes, any that have not yet reclaimed will be out
- * of luck on the next boot.
- *
- * (NFSv4.1+ clients are considered to have reclaimed once they
- * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to
- * have reclaimed after their first OPEN.)
- */
- locks_end_grace(&nn->nfsd4_manager);
- /*
- * At this point, and once lockd and/or any other containers
- * exit their grace period, further reclaims will fail and
- * regular locking can resume.
- */
+ maxreap = (atomic_read(&nn->nfs4_client_count) >= nn->nfs4_max_clients) ?
+ NFSD_CLIENT_MAX_TRIM_PER_RUN : 0;
+ INIT_LIST_HEAD(reaplist);
+ spin_lock(&nn->client_lock);
+ list_for_each_safe(pos, next, &nn->client_lru) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
+ if (clp->cl_state == NFSD4_EXPIRABLE)
+ goto exp_client;
+ if (!state_expired(lt, clp->cl_time))
+ break;
+ if (!atomic_read(&clp->cl_rpc_users)) {
+ if (clp->cl_state == NFSD4_ACTIVE)
+ atomic_inc(&nn->nfsd_courtesy_clients);
+ clp->cl_state = NFSD4_COURTESY;
+ }
+ if (!client_has_state(clp))
+ goto exp_client;
+ if (!nfs4_anylock_blockers(clp))
+ if (reapcnt >= maxreap)
+ continue;
+exp_client:
+ if (!mark_client_expired_locked(clp)) {
+ list_add(&clp->cl_lru, reaplist);
+ reapcnt++;
+ }
+ }
+ spin_unlock(&nn->client_lock);
}
-/*
- * If we've waited a lease period but there are still clients trying to
- * reclaim, wait a little longer to give them a chance to finish.
- */
-static bool clients_still_reclaiming(struct nfsd_net *nn)
+static void
+nfs4_get_courtesy_client_reaplist(struct nfsd_net *nn,
+ struct list_head *reaplist)
{
- time64_t double_grace_period_end = nn->boot_time +
- 2 * nn->nfsd4_lease;
+ unsigned int maxreap = 0, reapcnt = 0;
+ struct list_head *pos, *next;
+ struct nfs4_client *clp;
- if (nn->track_reclaim_completes &&
- atomic_read(&nn->nr_reclaim_complete) ==
- nn->reclaim_str_hashtbl_size)
- return false;
- if (!nn->somebody_reclaimed)
- return false;
- nn->somebody_reclaimed = false;
- /*
- * If we've given them *two* lease times to reclaim, and they're
- * still not done, give up:
- */
- if (ktime_get_boottime_seconds() > double_grace_period_end)
- return false;
- return true;
+ maxreap = NFSD_CLIENT_MAX_TRIM_PER_RUN;
+ INIT_LIST_HEAD(reaplist);
+
+ spin_lock(&nn->client_lock);
+ list_for_each_safe(pos, next, &nn->client_lru) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
+ if (clp->cl_state == NFSD4_ACTIVE)
+ break;
+ if (reapcnt >= maxreap)
+ break;
+ if (!mark_client_expired_locked(clp)) {
+ list_add(&clp->cl_lru, reaplist);
+ reapcnt++;
+ }
+ }
+ spin_unlock(&nn->client_lock);
+}
+
+static void
+nfs4_process_client_reaplist(struct list_head *reaplist)
+{
+ struct list_head *pos, *next;
+ struct nfs4_client *clp;
+
+ list_for_each_safe(pos, next, reaplist) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
+ trace_nfsd_clid_purged(&clp->cl_clientid);
+ list_del_init(&clp->cl_lru);
+ expire_client(clp);
+ }
}
static time64_t
nfs4_laundromat(struct nfsd_net *nn)
{
- struct nfs4_client *clp;
struct nfs4_openowner *oo;
struct nfs4_delegation *dp;
struct nfs4_ol_stateid *stp;
struct nfsd4_blocked_lock *nbl;
struct list_head *pos, *next, reaplist;
- time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease;
- time64_t t, new_timeo = nn->nfsd4_lease;
+ struct laundry_time lt = {
+ .cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease,
+ .new_timeo = nn->nfsd4_lease
+ };
struct nfs4_cpntf_state *cps;
copy_stateid_t *cps_t;
int i;
if (clients_still_reclaiming(nn)) {
- new_timeo = 0;
+ lt.new_timeo = 0;
goto out;
}
nfsd4_end_grace(nn);
- INIT_LIST_HEAD(&reaplist);
spin_lock(&nn->s2s_cp_lock);
idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) {
cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid);
- if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID &&
- cps->cpntf_time < cutoff)
+ if (cps->cp_stateid.cs_type == NFS4_COPYNOTIFY_STID &&
+ state_expired(<, cps->cpntf_time))
_free_cpntf_state_locked(nn, cps);
}
spin_unlock(&nn->s2s_cp_lock);
+ nfs4_get_client_reaplist(nn, &reaplist, <);
+ nfs4_process_client_reaplist(&reaplist);
- spin_lock(&nn->client_lock);
- list_for_each_safe(pos, next, &nn->client_lru) {
- clp = list_entry(pos, struct nfs4_client, cl_lru);
- if (clp->cl_time > cutoff) {
- t = clp->cl_time - cutoff;
- new_timeo = min(new_timeo, t);
- break;
- }
- if (mark_client_expired_locked(clp)) {
- trace_nfsd_clid_expired(&clp->cl_clientid);
- continue;
- }
- list_add(&clp->cl_lru, &reaplist);
- }
- spin_unlock(&nn->client_lock);
- list_for_each_safe(pos, next, &reaplist) {
- clp = list_entry(pos, struct nfs4_client, cl_lru);
- trace_nfsd_clid_purged(&clp->cl_clientid);
- list_del_init(&clp->cl_lru);
- expire_client(clp);
- }
spin_lock(&state_lock);
list_for_each_safe(pos, next, &nn->del_recall_lru) {
dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru);
- if (dp->dl_time > cutoff) {
- t = dp->dl_time - cutoff;
- new_timeo = min(new_timeo, t);
+ if (!state_expired(<, dp->dl_time))
break;
- }
WARN_ON(!unhash_delegation_locked(dp));
list_add(&dp->dl_recall_lru, &reaplist);
}
@@ -5468,11 +6137,8 @@ nfs4_laundromat(struct nfsd_net *nn)
while (!list_empty(&nn->close_lru)) {
oo = list_first_entry(&nn->close_lru, struct nfs4_openowner,
oo_close_lru);
- if (oo->oo_time > cutoff) {
- t = oo->oo_time - cutoff;
- new_timeo = min(new_timeo, t);
+ if (!state_expired(<, oo->oo_time))
break;
- }
list_del_init(&oo->oo_close_lru);
stp = oo->oo_last_closed_stid;
oo->oo_last_closed_stid = NULL;
@@ -5498,11 +6164,8 @@ nfs4_laundromat(struct nfsd_net *nn)
while (!list_empty(&nn->blocked_locks_lru)) {
nbl = list_first_entry(&nn->blocked_locks_lru,
struct nfsd4_blocked_lock, nbl_lru);
- if (nbl->nbl_time > cutoff) {
- t = nbl->nbl_time - cutoff;
- new_timeo = min(new_timeo, t);
+ if (!state_expired(<, nbl->nbl_time))
break;
- }
list_move(&nbl->nbl_lru, &reaplist);
list_del_init(&nbl->nbl_list);
}
@@ -5514,12 +6177,14 @@ nfs4_laundromat(struct nfsd_net *nn)
list_del_init(&nbl->nbl_lru);
free_blocked_lock(nbl);
}
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+ /* service the server-to-server copy delayed unmount list */
+ nfsd4_ssc_expire_umount(nn);
+#endif
out:
- new_timeo = max_t(time64_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
- return new_timeo;
+ return max_t(time64_t, lt.new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT);
}
-static struct workqueue_struct *laundry_wq;
static void laundromat_main(struct work_struct *);
static void
@@ -5534,26 +6199,68 @@ laundromat_main(struct work_struct *laundry)
queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ);
}
-static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
+static void
+courtesy_client_reaper(struct nfsd_net *nn)
{
- if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
- return nfserr_bad_stateid;
- return nfs_ok;
+ struct list_head reaplist;
+
+ nfs4_get_courtesy_client_reaplist(nn, &reaplist);
+ nfs4_process_client_reaplist(&reaplist);
}
-static inline int
-access_permit_read(struct nfs4_ol_stateid *stp)
+static void
+deleg_reaper(struct nfsd_net *nn)
{
- return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
- test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
- test_access(NFS4_SHARE_ACCESS_WRITE, stp);
+ struct list_head *pos, *next;
+ struct nfs4_client *clp;
+ struct list_head cblist;
+
+ INIT_LIST_HEAD(&cblist);
+ spin_lock(&nn->client_lock);
+ list_for_each_safe(pos, next, &nn->client_lru) {
+ clp = list_entry(pos, struct nfs4_client, cl_lru);
+ if (clp->cl_state != NFSD4_ACTIVE ||
+ list_empty(&clp->cl_delegations) ||
+ atomic_read(&clp->cl_delegs_in_recall) ||
+ test_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags) ||
+ (ktime_get_boottime_seconds() -
+ clp->cl_ra_time < 5)) {
+ continue;
+ }
+ list_add(&clp->cl_ra_cblist, &cblist);
+
+ /* release in nfsd4_cb_recall_any_release */
+ atomic_inc(&clp->cl_rpc_users);
+ set_bit(NFSD4_CLIENT_CB_RECALL_ANY, &clp->cl_flags);
+ clp->cl_ra_time = ktime_get_boottime_seconds();
+ }
+ spin_unlock(&nn->client_lock);
+
+ while (!list_empty(&cblist)) {
+ clp = list_first_entry(&cblist, struct nfs4_client,
+ cl_ra_cblist);
+ list_del_init(&clp->cl_ra_cblist);
+ clp->cl_ra->ra_keep = 0;
+ clp->cl_ra->ra_bmval[0] = BIT(RCA4_TYPE_MASK_RDATA_DLG);
+ nfsd4_run_cb(&clp->cl_ra->ra_cb);
+ }
}
-static inline int
-access_permit_write(struct nfs4_ol_stateid *stp)
+static void
+nfsd4_state_shrinker_worker(struct work_struct *work)
{
- return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
- test_access(NFS4_SHARE_ACCESS_BOTH, stp);
+ struct nfsd_net *nn = container_of(work, struct nfsd_net,
+ nfsd_shrinker_work);
+
+ courtesy_client_reaper(nn);
+ deleg_reaper(nn);
+}
+
+static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp)
+{
+ if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle))
+ return nfserr_bad_stateid;
+ return nfs_ok;
}
static
@@ -5692,6 +6399,7 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
struct nfs4_stid **s, struct nfsd_net *nn)
{
__be32 status;
+ struct nfs4_stid *stid;
bool return_revoked = false;
/*
@@ -5706,8 +6414,7 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) ||
CLOSE_STATEID(stateid))
return nfserr_bad_stateid;
- status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn,
- false);
+ status = set_client(&stateid->si_opaque.so_clid, cstate, nn);
if (status == nfserr_stale_clientid) {
if (cstate->session)
return nfserr_bad_stateid;
@@ -5715,15 +6422,16 @@ nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
}
if (status)
return status;
- *s = find_stateid_by_type(cstate->clp, stateid, typemask);
- if (!*s)
+ stid = find_stateid_by_type(cstate->clp, stateid, typemask);
+ if (!stid)
return nfserr_bad_stateid;
- if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
- nfs4_put_stid(*s);
+ if ((stid->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) {
+ nfs4_put_stid(stid);
if (cstate->minorversion)
return nfserr_deleg_revoked;
return nfserr_bad_stateid;
}
+ *s = stid;
return nfs_ok;
}
@@ -5788,12 +6496,12 @@ nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s,
static void
_free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps)
{
- WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID);
- if (!refcount_dec_and_test(&cps->cp_stateid.sc_count))
+ WARN_ON_ONCE(cps->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID);
+ if (!refcount_dec_and_test(&cps->cp_stateid.cs_count))
return;
list_del(&cps->cp_list);
idr_remove(&nn->s2s_cp_stateids,
- cps->cp_stateid.stid.si_opaque.so_id);
+ cps->cp_stateid.cs_stid.si_opaque.so_id);
kfree(cps);
}
/*
@@ -5815,12 +6523,12 @@ __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
if (cps_t) {
state = container_of(cps_t, struct nfs4_cpntf_state,
cp_stateid);
- if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) {
+ if (state->cp_stateid.cs_type != NFS4_COPYNOTIFY_STID) {
state = NULL;
goto unlock;
}
if (!clp)
- refcount_inc(&state->cp_stateid.sc_count);
+ refcount_inc(&state->cp_stateid.cs_count);
else
_free_cpntf_state_locked(nn, state);
}
@@ -5838,21 +6546,27 @@ static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
{
__be32 status;
struct nfs4_cpntf_state *cps = NULL;
- struct nfsd4_compound_state cstate;
+ struct nfs4_client *found;
status = manage_cpntf_state(nn, st, NULL, &cps);
if (status)
return status;
cps->cpntf_time = ktime_get_boottime_seconds();
- memset(&cstate, 0, sizeof(cstate));
- status = lookup_clientid(&cps->cp_p_clid, &cstate, nn, true);
- if (status)
+
+ status = nfserr_expired;
+ found = lookup_clientid(&cps->cp_p_clid, true, nn);
+ if (!found)
goto out;
- status = nfsd4_lookup_stateid(&cstate, &cps->cp_p_stateid,
- NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
- stid, nn);
- put_client_renew(cstate.clp);
+
+ *stid = find_stateid_by_type(found, &cps->cp_p_stateid,
+ NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID);
+ if (*stid)
+ status = nfs_ok;
+ else
+ status = nfserr_bad_stateid;
+
+ put_client_renew(found);
out:
nfs4_put_cpntf_state(nn, cps);
return status;
@@ -5887,7 +6601,11 @@ nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
return nfserr_grace;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
- status = check_special_stateids(net, fhp, stateid, flags);
+ if (cstid)
+ status = nfserr_bad_stateid;
+ else
+ status = check_special_stateids(net, fhp, stateid,
+ flags);
goto done;
}
@@ -5941,7 +6659,7 @@ nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
{
struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
struct nfsd4_test_stateid_id *stateid;
- struct nfs4_client *cl = cstate->session->se_client;
+ struct nfs4_client *cl = cstate->clp;
list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
stateid->ts_id_status =
@@ -5987,7 +6705,7 @@ nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
stateid_t *stateid = &free_stateid->fr_stateid;
struct nfs4_stid *s;
struct nfs4_delegation *dp;
- struct nfs4_client *cl = cstate->session->se_client;
+ struct nfs4_client *cl = cstate->clp;
__be32 ret = nfserr_bad_stateid;
spin_lock(&cl->cl_lock);
@@ -6316,6 +7034,8 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (status)
goto put_stateid;
+ trace_nfsd_deleg_return(stateid);
+ wake_up_var(d_inode(cstate->current_fh.fh_dentry));
destroy_delegation(dp);
put_stateid:
nfs4_put_stid(&dp->dl_stid);
@@ -6323,15 +7043,6 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return status;
}
-static inline u64
-end_offset(u64 start, u64 len)
-{
- u64 end;
-
- end = start + len;
- return end >= start ? end: NFS4_MAX_UINT64;
-}
-
/* last octet in a range */
static inline u64
last_byte_offset(u64 start, u64 len)
@@ -6361,7 +7072,7 @@ nfs4_transform_lock_offset(struct file_lock *lock)
}
static fl_owner_t
-nfsd4_fl_get_owner(fl_owner_t owner)
+nfsd4_lm_get_owner(fl_owner_t owner)
{
struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
@@ -6370,7 +7081,7 @@ nfsd4_fl_get_owner(fl_owner_t owner)
}
static void
-nfsd4_fl_put_owner(fl_owner_t owner)
+nfsd4_lm_put_owner(fl_owner_t owner)
{
struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner;
@@ -6378,6 +7089,29 @@ nfsd4_fl_put_owner(fl_owner_t owner)
nfs4_put_stateowner(&lo->lo_owner);
}
+/* return pointer to struct nfs4_client if client is expirable */
+static bool
+nfsd4_lm_lock_expirable(struct file_lock *cfl)
+{
+ struct nfs4_lockowner *lo = (struct nfs4_lockowner *)cfl->fl_owner;
+ struct nfs4_client *clp = lo->lo_owner.so_client;
+ struct nfsd_net *nn;
+
+ if (try_to_expire_client(clp)) {
+ nn = net_generic(clp->net, nfsd_net_id);
+ mod_delayed_work(laundry_wq, &nn->laundromat_work, 0);
+ return true;
+ }
+ return false;
+}
+
+/* schedule laundromat to run immediately and wait for it to complete */
+static void
+nfsd4_lm_expire_lock(void)
+{
+ flush_workqueue(laundry_wq);
+}
+
static void
nfsd4_lm_notify(struct file_lock *fl)
{
@@ -6397,14 +7131,19 @@ nfsd4_lm_notify(struct file_lock *fl)
}
spin_unlock(&nn->blocked_locks_lock);
- if (queue)
+ if (queue) {
+ trace_nfsd_cb_notify_lock(lo, nbl);
nfsd4_run_cb(&nbl->nbl_cb);
+ }
}
static const struct lock_manager_operations nfsd_posix_mng_ops = {
+ .lm_mod_owner = THIS_MODULE,
.lm_notify = nfsd4_lm_notify,
- .lm_get_owner = nfsd4_fl_get_owner,
- .lm_put_owner = nfsd4_fl_put_owner,
+ .lm_get_owner = nfsd4_lm_get_owner,
+ .lm_put_owner = nfsd4_lm_put_owner,
+ .lm_lock_expirable = nfsd4_lm_lock_expirable,
+ .lm_expire_lock = nfsd4_lm_expire_lock,
};
static inline void
@@ -6719,13 +7458,9 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (nfsd4_has_session(cstate))
/* See rfc 5661 18.10.3: given clientid is ignored: */
memcpy(&lock->lk_new_clientid,
- &cstate->session->se_client->cl_clientid,
+ &cstate->clp->cl_clientid,
sizeof(clientid_t));
- status = nfserr_stale_clientid;
- if (STALE_CLIENTID(&lock->lk_new_clientid, nn))
- goto out;
-
/* validate and update open stateid and open seqid */
status = nfs4_preprocess_confirmed_seqid_op(cstate,
lock->lk_new_open_seqid,
@@ -6763,6 +7498,9 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (!locks_in_grace(net) && lock->lk_reclaim)
goto out;
+ if (lock->lk_reclaim)
+ fl_flags |= FL_RECLAIM;
+
fp = lock_stp->st_stid.sc_file;
switch (lock->lk_type) {
case NFS4_READW_LT:
@@ -6799,6 +7537,16 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
}
+ /*
+ * Most filesystems with their own ->lock operations will block
+ * the nfsd thread waiting to acquire the lock. That leads to
+ * deadlocks (we don't want every nfsd thread tied up waiting
+ * for file locks), so don't attempt blocking lock notifications
+ * on those filesystems:
+ */
+ if (nf->nf_file->f_op->lock)
+ fl_flags &= ~FL_SLEEP;
+
nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn);
if (!nbl) {
dprintk("NFSD: %s: unable to allocate block!\n", __func__);
@@ -6829,6 +7577,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
spin_lock(&nn->blocked_locks_lock);
list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
+ kref_get(&nbl->nbl_kref);
spin_unlock(&nn->blocked_locks_lock);
}
@@ -6841,6 +7590,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nn->somebody_reclaimed = true;
break;
case FILE_LOCK_DEFERRED:
+ kref_put(&nbl->nbl_kref, free_nbl);
nbl = NULL;
fallthrough;
case -EAGAIN: /* conflock holds conflicting lock */
@@ -6861,8 +7611,13 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
/* dequeue it if we queued it before */
if (fl_flags & FL_SLEEP) {
spin_lock(&nn->blocked_locks_lock);
- list_del_init(&nbl->nbl_list);
- list_del_init(&nbl->nbl_lru);
+ if (!list_empty(&nbl->nbl_list) &&
+ !list_empty(&nbl->nbl_lru)) {
+ list_del_init(&nbl->nbl_list);
+ list_del_init(&nbl->nbl_lru);
+ kref_put(&nbl->nbl_kref, free_nbl);
+ }
+ /* nbl can use one of lists to be linked to reaplist */
spin_unlock(&nn->blocked_locks_lock);
}
free_blocked_lock(nbl);
@@ -6903,21 +7658,22 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock)
{
struct nfsd_file *nf;
+ struct inode *inode;
__be32 err;
err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf);
if (err)
return err;
- fh_lock(fhp); /* to block new leases till after test_lock: */
- err = nfserrno(nfsd_open_break_lease(fhp->fh_dentry->d_inode,
- NFSD_MAY_READ));
+ inode = fhp->fh_dentry->d_inode;
+ inode_lock(inode); /* to block new leases till after test_lock: */
+ err = nfserrno(nfsd_open_break_lease(inode, NFSD_MAY_READ));
if (err)
goto out;
lock->fl_file = nf->nf_file;
err = nfserrno(vfs_test_lock(nf->nf_file, lock));
lock->fl_file = NULL;
out:
- fh_unlock(fhp);
+ inode_unlock(inode);
nfsd_file_put(nf);
return err;
}
@@ -6942,8 +7698,7 @@ nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
return nfserr_inval;
if (!nfsd4_has_session(cstate)) {
- status = lookup_clientid(&lockt->lt_clientid, cstate, nn,
- false);
+ status = set_client(&lockt->lt_clientid, cstate, nn);
if (status)
goto out;
}
@@ -7080,18 +7835,20 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
{
struct file_lock *fl;
int status = false;
- struct nfsd_file *nf = find_any_file(fp);
+ struct nfsd_file *nf;
struct inode *inode;
struct file_lock_context *flctx;
+ spin_lock(&fp->fi_lock);
+ nf = find_any_file_locked(fp);
if (!nf) {
/* Any valid lock stateid should have some sort of access */
WARN_ON_ONCE(1);
- return status;
+ goto out;
}
inode = locks_inode(nf->nf_file);
- flctx = inode->i_flctx;
+ flctx = locks_inode_context(inode);
if (flctx && !list_empty_careful(&flctx->flc_posix)) {
spin_lock(&flctx->flc_lock);
@@ -7103,57 +7860,62 @@ check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner)
}
spin_unlock(&flctx->flc_lock);
}
- nfsd_file_put(nf);
+out:
+ spin_unlock(&fp->fi_lock);
return status;
}
+/**
+ * nfsd4_release_lockowner - process NFSv4.0 RELEASE_LOCKOWNER operations
+ * @rqstp: RPC transaction
+ * @cstate: NFSv4 COMPOUND state
+ * @u: RELEASE_LOCKOWNER arguments
+ *
+ * Check if theree are any locks still held and if not - free the lockowner
+ * and any lock state that is owned.
+ *
+ * Return values:
+ * %nfs_ok: lockowner released or not found
+ * %nfserr_locks_held: lockowner still in use
+ * %nfserr_stale_clientid: clientid no longer active
+ * %nfserr_expired: clientid not recognized
+ */
__be32
nfsd4_release_lockowner(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
union nfsd4_op_u *u)
{
struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
clientid_t *clid = &rlockowner->rl_clientid;
- struct nfs4_stateowner *sop;
- struct nfs4_lockowner *lo = NULL;
struct nfs4_ol_stateid *stp;
- struct xdr_netobj *owner = &rlockowner->rl_owner;
- unsigned int hashval = ownerstr_hashval(owner);
- __be32 status;
- struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+ struct nfs4_lockowner *lo;
struct nfs4_client *clp;
- LIST_HEAD (reaplist);
+ LIST_HEAD(reaplist);
+ __be32 status;
dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n",
clid->cl_boot, clid->cl_id);
- status = lookup_clientid(clid, cstate, nn, false);
+ status = set_client(clid, cstate, nn);
if (status)
return status;
-
clp = cstate->clp;
- /* Find the matching lock stateowner */
- spin_lock(&clp->cl_lock);
- list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval],
- so_strhash) {
- if (sop->so_is_open_owner || !same_owner_str(sop, owner))
- continue;
+ spin_lock(&clp->cl_lock);
+ lo = find_lockowner_str_locked(clp, &rlockowner->rl_owner);
+ if (!lo) {
+ spin_unlock(&clp->cl_lock);
+ return nfs_ok;
+ }
- if (atomic_read(&sop->so_count) != 1) {
+ list_for_each_entry(stp, &lo->lo_owner.so_stateids, st_perstateowner) {
+ if (check_for_locks(stp->st_stid.sc_file, lo)) {
spin_unlock(&clp->cl_lock);
+ nfs4_put_stateowner(&lo->lo_owner);
return nfserr_locks_held;
}
-
- lo = lockowner(sop);
- nfs4_get_stateowner(sop);
- break;
- }
- if (!lo) {
- spin_unlock(&clp->cl_lock);
- return status;
}
-
unhash_lockowner_locked(lo);
while (!list_empty(&lo->lo_owner.so_stateids)) {
stp = list_first_entry(&lo->lo_owner.so_stateids,
@@ -7163,11 +7925,11 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
put_ol_stateid_locked(stp, &reaplist);
}
spin_unlock(&clp->cl_lock);
+
free_ol_stateid_reaplist(&reaplist);
remove_blocked_locks(lo);
nfs4_put_stateowner(&lo->lo_owner);
-
- return status;
+ return nfs_ok;
}
static inline struct nfs4_client_reclaim *
@@ -7256,25 +8018,13 @@ nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn)
return NULL;
}
-/*
-* Called from OPEN. Look for clientid in reclaim list.
-*/
__be32
-nfs4_check_open_reclaim(clientid_t *clid,
- struct nfsd4_compound_state *cstate,
- struct nfsd_net *nn)
+nfs4_check_open_reclaim(struct nfs4_client *clp)
{
- __be32 status;
-
- /* find clientid in conf_id_hashtbl */
- status = lookup_clientid(clid, cstate, nn, false);
- if (status)
- return nfserr_reclaim_bad;
-
- if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags))
+ if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &clp->cl_flags))
return nfserr_no_grace;
- if (nfsd4_client_record_check(cstate->clp))
+ if (nfsd4_client_record_check(clp))
return nfserr_reclaim_bad;
return nfs_ok;
@@ -7345,10 +8095,20 @@ static int nfs4_state_create_net(struct net *net)
INIT_LIST_HEAD(&nn->blocked_locks_lru);
INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main);
+ INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker);
get_net(net);
+ nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan;
+ nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count;
+ nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS;
+
+ if (register_shrinker(&nn->nfsd_client_shrinker))
+ goto err_shrinker;
return 0;
+err_shrinker:
+ put_net(net);
+ kfree(nn->sessionid_hashtbl);
err_sessionid:
kfree(nn->unconf_id_hashtbl);
err_unconf_id:
@@ -7420,22 +8180,18 @@ nfs4_state_start(void)
{
int ret;
- laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4");
- if (laundry_wq == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- ret = nfsd4_create_callback_queue();
+ ret = rhltable_init(&nfs4_file_rhltable, &nfs4_file_rhash_params);
if (ret)
- goto out_free_laundry;
+ return ret;
+
+ ret = nfsd4_create_callback_queue();
+ if (ret) {
+ rhltable_destroy(&nfs4_file_rhltable);
+ return ret;
+ }
set_max_delegations();
return 0;
-
-out_free_laundry:
- destroy_workqueue(laundry_wq);
-out:
- return ret;
}
void
@@ -7445,6 +8201,8 @@ nfs4_state_shutdown_net(struct net *net)
struct list_head *pos, *next, reaplist;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ unregister_shrinker(&nn->nfsd_client_shrinker);
+ cancel_work(&nn->nfsd_shrinker_work);
cancel_delayed_work_sync(&nn->laundromat_work);
locks_end_grace(&nn->nfsd4_manager);
@@ -7464,13 +8222,16 @@ nfs4_state_shutdown_net(struct net *net)
nfsd4_client_tracking_exit(net);
nfs4_state_destroy_net(net);
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+ nfsd4_ssc_shutdown_umount(nn);
+#endif
}
void
nfs4_state_shutdown(void)
{
- destroy_workqueue(laundry_wq);
nfsd4_destroy_callback_queue();
+ rhltable_destroy(&nfs4_file_rhltable);
}
static void
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index dbfa24cf3390..5a68c6286492 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -42,6 +42,8 @@
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/addr.h>
#include <linux/xattr.h>
+#include <linux/vmalloc.h>
+
#include <uapi/linux/xattr.h>
#include "idmap.h"
@@ -54,6 +56,8 @@
#include "pnfs.h"
#include "filecache.h"
+#include "trace.h"
+
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
#endif
@@ -90,6 +94,8 @@ check_filename(char *str, int len)
if (len == 0)
return nfserr_inval;
+ if (len > NFS4_MAXNAMLEN)
+ return nfserr_nametoolong;
if (isdotent(str, len))
return nfserr_badname;
for (i = 0; i < len; i++)
@@ -98,122 +104,6 @@ check_filename(char *str, int len)
return 0;
}
-#define DECODE_HEAD \
- __be32 *p; \
- __be32 status
-#define DECODE_TAIL \
- status = 0; \
-out: \
- return status; \
-xdr_error: \
- dprintk("NFSD: xdr error (%s:%d)\n", \
- __FILE__, __LINE__); \
- status = nfserr_bad_xdr; \
- goto out
-
-#define READMEM(x,nbytes) do { \
- x = (char *)p; \
- p += XDR_QUADLEN(nbytes); \
-} while (0)
-#define SAVEMEM(x,nbytes) do { \
- if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
- savemem(argp, p, nbytes) : \
- (char *)p)) { \
- dprintk("NFSD: xdr error (%s:%d)\n", \
- __FILE__, __LINE__); \
- goto xdr_error; \
- } \
- p += XDR_QUADLEN(nbytes); \
-} while (0)
-#define COPYMEM(x,nbytes) do { \
- memcpy((x), p, nbytes); \
- p += XDR_QUADLEN(nbytes); \
-} while (0)
-
-/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
-#define READ_BUF(nbytes) do { \
- if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
- p = argp->p; \
- argp->p += XDR_QUADLEN(nbytes); \
- } else if (!(p = read_buf(argp, nbytes))) { \
- dprintk("NFSD: xdr error (%s:%d)\n", \
- __FILE__, __LINE__); \
- goto xdr_error; \
- } \
-} while (0)
-
-static void next_decode_page(struct nfsd4_compoundargs *argp)
-{
- argp->p = page_address(argp->pagelist[0]);
- argp->pagelist++;
- if (argp->pagelen < PAGE_SIZE) {
- argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
- argp->pagelen = 0;
- } else {
- argp->end = argp->p + (PAGE_SIZE>>2);
- argp->pagelen -= PAGE_SIZE;
- }
-}
-
-static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
-{
- /* We want more bytes than seem to be available.
- * Maybe we need a new page, maybe we have just run out
- */
- unsigned int avail = (char *)argp->end - (char *)argp->p;
- __be32 *p;
-
- if (argp->pagelen == 0) {
- struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
-
- if (!argp->tail) {
- argp->tail = true;
- avail = vec->iov_len;
- argp->p = vec->iov_base;
- argp->end = vec->iov_base + avail;
- }
-
- if (avail < nbytes)
- return NULL;
-
- p = argp->p;
- argp->p += XDR_QUADLEN(nbytes);
- return p;
- }
-
- if (avail + argp->pagelen < nbytes)
- return NULL;
- if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
- return NULL;
- /* ok, we can do it with the current plus the next page */
- if (nbytes <= sizeof(argp->tmp))
- p = argp->tmp;
- else {
- kfree(argp->tmpp);
- p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
- if (!p)
- return NULL;
-
- }
- /*
- * The following memcpy is safe because read_buf is always
- * called with nbytes > avail, and the two cases above both
- * guarantee p points to at least nbytes bytes.
- */
- memcpy(p, argp->p, avail);
- next_decode_page(argp);
- memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
- argp->p += XDR_QUADLEN(nbytes - avail);
- return p;
-}
-
-static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
-{
- unsigned int this = (char *)argp->end - (char *)argp->p;
-
- return this + argp->pagelen;
-}
-
static int zero_clientid(clientid_t *clid)
{
return (clid->cl_boot == 0) && (clid->cl_id == 0);
@@ -259,118 +149,246 @@ svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
return p;
}
-static __be32
-svcxdr_construct_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
- struct page ***pagelist, u32 buflen)
+static void *
+svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
{
- int avail;
- int len;
- int pages;
+ __be32 *tmp;
- /* Sorry .. no magic macros for this.. *
- * READ_BUF(write->wr_buflen);
- * SAVEMEM(write->wr_buf, write->wr_buflen);
+ /*
+ * The location of the decoded data item is stable,
+ * so @p is OK to use. This is the common case.
*/
- avail = (char *)argp->end - (char *)argp->p;
- if (avail + argp->pagelen < buflen) {
- dprintk("NFSD: xdr error (%s:%d)\n",
- __FILE__, __LINE__);
+ if (p != argp->xdr->scratch.iov_base)
+ return p;
+
+ tmp = svcxdr_tmpalloc(argp, len);
+ if (!tmp)
+ return NULL;
+ memcpy(tmp, p, len);
+ return tmp;
+}
+
+/*
+ * NFSv4 basic data type decoders
+ */
+
+/*
+ * This helper handles variable-length opaques which belong to protocol
+ * elements that this implementation does not support.
+ */
+static __be32
+nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
+{
+ u32 len;
+
+ if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
+ return nfserr_bad_xdr;
+ if (maxlen && len > maxlen)
+ return nfserr_bad_xdr;
+ if (!xdr_inline_decode(argp->xdr, len))
return nfserr_bad_xdr;
- }
- head->iov_base = argp->p;
- head->iov_len = avail;
- *pagelist = argp->pagelist;
- len = XDR_QUADLEN(buflen) << 2;
- if (len >= avail) {
- len -= avail;
+ return nfs_ok;
+}
- pages = len >> PAGE_SHIFT;
- argp->pagelist += pages;
- argp->pagelen -= pages * PAGE_SIZE;
- len -= pages * PAGE_SIZE;
+static __be32
+nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
+{
+ __be32 *p;
+ u32 len;
- next_decode_page(argp);
- }
- argp->p += XDR_QUADLEN(len);
+ if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
+ return nfserr_bad_xdr;
+ if (len == 0 || len > NFS4_OPAQUE_LIMIT)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, len);
+ if (!p)
+ return nfserr_bad_xdr;
+ o->data = svcxdr_savemem(argp, p, len);
+ if (!o->data)
+ return nfserr_jukebox;
+ o->len = len;
- return 0;
+ return nfs_ok;
}
-/**
- * savemem - duplicate a chunk of memory for later processing
- * @argp: NFSv4 compound argument structure to be freed with
- * @p: pointer to be duplicated
- * @nbytes: length to be duplicated
- *
- * Returns a pointer to a copy of @nbytes bytes of memory at @p
- * that are preserved until processing of the NFSv4 compound
- * operation described by @argp finishes.
- */
-static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
+static __be32
+nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
{
- void *ret;
+ __be32 *p, status;
- ret = svcxdr_tmpalloc(argp, nbytes);
- if (!ret)
- return NULL;
- memcpy(ret, p, nbytes);
- return ret;
+ if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, *lenp);
+ if (!p)
+ return nfserr_bad_xdr;
+ status = check_filename((char *)p, *lenp);
+ if (status)
+ return status;
+ *namp = svcxdr_savemem(argp, p, *lenp);
+ if (!*namp)
+ return nfserr_jukebox;
+
+ return nfs_ok;
}
static __be32
-nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
+nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
{
- DECODE_HEAD;
+ __be32 *p;
- READ_BUF(12);
+ p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
+ if (!p)
+ return nfserr_bad_xdr;
p = xdr_decode_hyper(p, &tv->tv_sec);
tv->tv_nsec = be32_to_cpup(p++);
if (tv->tv_nsec >= (u32)1000000000)
return nfserr_inval;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(verf->data, p, sizeof(verf->data));
+ return nfs_ok;
+}
+
+/**
+ * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
+ * @argp: NFSv4 compound argument structure
+ * @bmval: pointer to an array of u32's to decode into
+ * @bmlen: size of the @bmval array
+ *
+ * The server needs to return nfs_ok rather than nfserr_bad_xdr when
+ * encountering bitmaps containing bits it does not recognize. This
+ * includes bits in bitmap words past WORDn, where WORDn is the last
+ * bitmap WORD the implementation currently supports. Thus we are
+ * careful here to simply ignore bits in bitmap words that this
+ * implementation has yet to support explicitly.
+ *
+ * Return values:
+ * %nfs_ok: @bmval populated successfully
+ * %nfserr_bad_xdr: the encoded bitmap was invalid
+ */
+static __be32
+nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
+{
+ ssize_t status;
- DECODE_TAIL;
+ status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen);
+ return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok;
}
static __be32
-nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
+nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
+{
+ __be32 *p, status;
+ u32 length;
+
+ if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
+ return nfserr_bad_xdr;
+
+ if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, length);
+ if (!p)
+ return nfserr_bad_xdr;
+ ace->whotype = nfs4_acl_get_whotype((char *)p, length);
+ if (ace->whotype != NFS4_ACL_WHO_NAMED)
+ status = nfs_ok;
+ else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
+ status = nfsd_map_name_to_gid(argp->rqstp,
+ (char *)p, length, &ace->who_gid);
+ else
+ status = nfsd_map_name_to_uid(argp->rqstp,
+ (char *)p, length, &ace->who_uid);
+
+ return status;
+}
+
+/* A counted array of nfsace4's */
+static noinline __be32
+nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
{
- u32 bmlen;
- DECODE_HEAD;
+ struct nfs4_ace *ace;
+ __be32 status;
+ u32 count;
+
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+
+ if (count > xdr_stream_remaining(argp->xdr) / 20)
+ /*
+ * Even with 4-byte names there wouldn't be
+ * space for that many aces; something fishy is
+ * going on:
+ */
+ return nfserr_fbig;
+
+ *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
+ if (*acl == NULL)
+ return nfserr_jukebox;
- bmval[0] = 0;
- bmval[1] = 0;
- bmval[2] = 0;
+ (*acl)->naces = count;
+ for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
+ status = nfsd4_decode_nfsace4(argp, ace);
+ if (status)
+ return status;
+ }
+
+ return nfs_ok;
+}
+
+static noinline __be32
+nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
+ struct xdr_netobj *label)
+{
+ u32 lfs, pi, length;
+ __be32 *p;
- READ_BUF(4);
- bmlen = be32_to_cpup(p++);
- if (bmlen > 1000)
- goto xdr_error;
+ if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
+ return nfserr_bad_xdr;
- READ_BUF(bmlen << 2);
- if (bmlen > 0)
- bmval[0] = be32_to_cpup(p++);
- if (bmlen > 1)
- bmval[1] = be32_to_cpup(p++);
- if (bmlen > 2)
- bmval[2] = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+ return nfserr_bad_xdr;
+ if (length > NFS4_MAXLABELLEN)
+ return nfserr_badlabel;
+ p = xdr_inline_decode(argp->xdr, length);
+ if (!p)
+ return nfserr_bad_xdr;
+ label->len = length;
+ label->data = svcxdr_dupstr(argp, p, length);
+ if (!label->data)
+ return nfserr_jukebox;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
- struct iattr *iattr, struct nfs4_acl **acl,
- struct xdr_netobj *label, int *umask)
+nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
+ struct iattr *iattr, struct nfs4_acl **acl,
+ struct xdr_netobj *label, int *umask)
{
- int expected_len, len = 0;
- u32 dummy32;
- char *buf;
+ unsigned int starting_pos;
+ u32 attrlist4_count;
+ __be32 *p, status;
- DECODE_HEAD;
iattr->ia_valid = 0;
- if ((status = nfsd4_decode_bitmap(argp, bmval)))
- return status;
+ status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
+ if (status)
+ return nfserr_bad_xdr;
if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
|| bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
@@ -380,96 +398,69 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
return nfserr_attrnotsupp;
}
- READ_BUF(4);
- expected_len = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
+ return nfserr_bad_xdr;
+ starting_pos = xdr_stream_pos(argp->xdr);
if (bmval[0] & FATTR4_WORD0_SIZE) {
- READ_BUF(8);
- len += 8;
- p = xdr_decode_hyper(p, &iattr->ia_size);
+ u64 size;
+
+ if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
+ return nfserr_bad_xdr;
+ iattr->ia_size = size;
iattr->ia_valid |= ATTR_SIZE;
}
if (bmval[0] & FATTR4_WORD0_ACL) {
- u32 nace;
- struct nfs4_ace *ace;
-
- READ_BUF(4); len += 4;
- nace = be32_to_cpup(p++);
-
- if (nace > compoundargs_bytes_left(argp)/20)
- /*
- * Even with 4-byte names there wouldn't be
- * space for that many aces; something fishy is
- * going on:
- */
- return nfserr_fbig;
-
- *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
- if (*acl == NULL)
- return nfserr_jukebox;
-
- (*acl)->naces = nace;
- for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
- READ_BUF(16); len += 16;
- ace->type = be32_to_cpup(p++);
- ace->flag = be32_to_cpup(p++);
- ace->access_mask = be32_to_cpup(p++);
- dummy32 = be32_to_cpup(p++);
- READ_BUF(dummy32);
- len += XDR_QUADLEN(dummy32) << 2;
- READMEM(buf, dummy32);
- ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
- status = nfs_ok;
- if (ace->whotype != NFS4_ACL_WHO_NAMED)
- ;
- else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
- status = nfsd_map_name_to_gid(argp->rqstp,
- buf, dummy32, &ace->who_gid);
- else
- status = nfsd_map_name_to_uid(argp->rqstp,
- buf, dummy32, &ace->who_uid);
- if (status)
- return status;
- }
+ status = nfsd4_decode_acl(argp, acl);
+ if (status)
+ return status;
} else
*acl = NULL;
if (bmval[1] & FATTR4_WORD1_MODE) {
- READ_BUF(4);
- len += 4;
- iattr->ia_mode = be32_to_cpup(p++);
+ u32 mode;
+
+ if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
+ return nfserr_bad_xdr;
+ iattr->ia_mode = mode;
iattr->ia_mode &= (S_IFMT | S_IALLUGO);
iattr->ia_valid |= ATTR_MODE;
}
if (bmval[1] & FATTR4_WORD1_OWNER) {
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++);
- READ_BUF(dummy32);
- len += (XDR_QUADLEN(dummy32) << 2);
- READMEM(buf, dummy32);
- if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
+ u32 length;
+
+ if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, length);
+ if (!p)
+ return nfserr_bad_xdr;
+ status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
+ &iattr->ia_uid);
+ if (status)
return status;
iattr->ia_valid |= ATTR_UID;
}
if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++);
- READ_BUF(dummy32);
- len += (XDR_QUADLEN(dummy32) << 2);
- READMEM(buf, dummy32);
- if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
+ u32 length;
+
+ if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, length);
+ if (!p)
+ return nfserr_bad_xdr;
+ status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
+ &iattr->ia_gid);
+ if (status)
return status;
iattr->ia_valid |= ATTR_GID;
}
if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++);
- switch (dummy32) {
+ u32 set_it;
+
+ if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
+ return nfserr_bad_xdr;
+ switch (set_it) {
case NFS4_SET_TO_CLIENT_TIME:
- len += 12;
- status = nfsd4_decode_time(argp, &iattr->ia_atime);
+ status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
if (status)
return status;
iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
@@ -478,17 +469,26 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
iattr->ia_valid |= ATTR_ATIME;
break;
default:
- goto xdr_error;
+ return nfserr_bad_xdr;
}
}
+ if (bmval[1] & FATTR4_WORD1_TIME_CREATE) {
+ struct timespec64 ts;
+
+ /* No Linux filesystem supports setting this attribute. */
+ bmval[1] &= ~FATTR4_WORD1_TIME_CREATE;
+ status = nfsd4_decode_nfstime4(argp, &ts);
+ if (status)
+ return status;
+ }
if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++);
- switch (dummy32) {
+ u32 set_it;
+
+ if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
+ return nfserr_bad_xdr;
+ switch (set_it) {
case NFS4_SET_TO_CLIENT_TIME:
- len += 12;
- status = nfsd4_decode_time(argp, &iattr->ia_mtime);
+ status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
if (status)
return status;
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
@@ -497,222 +497,335 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
iattr->ia_valid |= ATTR_MTIME;
break;
default:
- goto xdr_error;
+ return nfserr_bad_xdr;
}
}
-
label->len = 0;
if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
- READ_BUF(4);
- len += 4;
- dummy32 = be32_to_cpup(p++);
- READ_BUF(dummy32);
- if (dummy32 > NFS4_MAXLABELLEN)
- return nfserr_badlabel;
- len += (XDR_QUADLEN(dummy32) << 2);
- READMEM(buf, dummy32);
- label->len = dummy32;
- label->data = svcxdr_dupstr(argp, buf, dummy32);
- if (!label->data)
- return nfserr_jukebox;
+ status = nfsd4_decode_security_label(argp, label);
+ if (status)
+ return status;
}
if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
+ u32 mode, mask;
+
if (!umask)
- goto xdr_error;
- READ_BUF(8);
- len += 8;
- dummy32 = be32_to_cpup(p++);
- iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
- dummy32 = be32_to_cpup(p++);
- *umask = dummy32 & S_IRWXUGO;
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
+ return nfserr_bad_xdr;
+ iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
+ if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
+ return nfserr_bad_xdr;
+ *umask = mask & S_IRWXUGO;
iattr->ia_valid |= ATTR_MODE;
}
- if (len != expected_len)
- goto xdr_error;
- DECODE_TAIL;
+ /* request sanity: did attrlist4 contain the expected number of words? */
+ if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
+ return nfserr_bad_xdr;
+
+ return nfs_ok;
}
static __be32
-nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
+nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
{
- DECODE_HEAD;
+ __be32 *p;
- READ_BUF(sizeof(stateid_t));
+ p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
+ if (!p)
+ return nfserr_bad_xdr;
sid->si_generation = be32_to_cpup(p++);
- COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
-
- DECODE_TAIL;
+ memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
+ return nfs_ok;
}
static __be32
-nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
+nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
{
- DECODE_HEAD;
-
- READ_BUF(4);
- access->ac_req_access = be32_to_cpup(p++);
+ __be32 *p;
- DECODE_TAIL;
+ p = xdr_inline_decode(argp->xdr, sizeof(__be64));
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(clientid, p, sizeof(*clientid));
+ return nfs_ok;
}
-static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
+static __be32
+nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
+ clientid_t *clientid, struct xdr_netobj *owner)
{
- DECODE_HEAD;
- struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
- u32 dummy, uid, gid;
- char *machine_name;
- int i;
- int nr_secflavs;
+ __be32 status;
- /* callback_sec_params4 */
- READ_BUF(4);
- nr_secflavs = be32_to_cpup(p++);
- if (nr_secflavs)
- cbs->flavor = (u32)(-1);
- else
- /* Is this legal? Be generous, take it to mean AUTH_NONE: */
- cbs->flavor = 0;
- for (i = 0; i < nr_secflavs; ++i) {
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- switch (dummy) {
- case RPC_AUTH_NULL:
- /* Nothing to read */
- if (cbs->flavor == (u32)(-1))
- cbs->flavor = RPC_AUTH_NULL;
- break;
- case RPC_AUTH_UNIX:
- READ_BUF(8);
- /* stamp */
- dummy = be32_to_cpup(p++);
-
- /* machine name */
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- SAVEMEM(machine_name, dummy);
-
- /* uid, gid */
- READ_BUF(8);
- uid = be32_to_cpup(p++);
- gid = be32_to_cpup(p++);
-
- /* more gids */
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy * 4);
- if (cbs->flavor == (u32)(-1)) {
- kuid_t kuid = make_kuid(userns, uid);
- kgid_t kgid = make_kgid(userns, gid);
- if (uid_valid(kuid) && gid_valid(kgid)) {
- cbs->uid = kuid;
- cbs->gid = kgid;
- cbs->flavor = RPC_AUTH_UNIX;
- } else {
- dprintk("RPC_AUTH_UNIX with invalid"
- "uid or gid ignoring!\n");
- }
- }
- break;
- case RPC_AUTH_GSS:
- dprintk("RPC_AUTH_GSS callback secflavor "
- "not supported!\n");
- READ_BUF(8);
- /* gcbp_service */
- dummy = be32_to_cpup(p++);
- /* gcbp_handle_from_server */
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- /* gcbp_handle_from_client */
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- break;
- default:
- dprintk("Illegal callback secflavor\n");
- return nfserr_inval;
- }
- }
- DECODE_TAIL;
+ status = nfsd4_decode_clientid4(argp, clientid);
+ if (status)
+ return status;
+ return nfsd4_decode_opaque(argp, owner);
}
-static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
+#ifdef CONFIG_NFSD_PNFS
+static __be32
+nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_deviceid *devid)
{
- DECODE_HEAD;
-
- READ_BUF(4);
- bc->bc_cb_program = be32_to_cpup(p++);
- nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
+ __be32 *p;
- DECODE_TAIL;
+ p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(devid, p, sizeof(*devid));
+ return nfs_ok;
}
-static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
+static __be32
+nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutcommit *lcp)
{
- DECODE_HEAD;
+ if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
+ return nfserr_bad_xdr;
+ if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
+ return nfserr_bad_xdr;
+ if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
+ return nfserr_bad_xdr;
+
+ if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
+ return nfserr_bad_xdr;
+ if (lcp->lc_up_len > 0) {
+ lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
+ if (!lcp->lc_up_layout)
+ return nfserr_bad_xdr;
+ }
- READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
- COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
- bcts->dir = be32_to_cpup(p++);
- /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
- * could help us figure out we should be using it. */
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
+nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_layoutreturn *lrp)
{
- DECODE_HEAD;
+ __be32 status;
- READ_BUF(4);
- close->cl_seqid = be32_to_cpup(p++);
- return nfsd4_decode_stateid(argp, &close->cl_stateid);
+ if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
+ return nfserr_bad_xdr;
+ switch (lrp->lr_return_type) {
+ case RETURN_FILE:
+ if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
+ return nfserr_bad_xdr;
+ if (lrp->lrf_body_len > 0) {
+ lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
+ if (!lrp->lrf_body)
+ return nfserr_bad_xdr;
+ }
+ break;
+ case RETURN_FSID:
+ case RETURN_ALL:
+ lrp->lr_seg.offset = 0;
+ lrp->lr_seg.length = NFS4_MAX_UINT64;
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
- DECODE_TAIL;
+ return nfs_ok;
}
+#endif /* CONFIG_NFSD_PNFS */
static __be32
-nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
+nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
+ struct nfs4_sessionid *sessionid)
{
- DECODE_HEAD;
-
- READ_BUF(12);
- p = xdr_decode_hyper(p, &commit->co_offset);
- commit->co_count = be32_to_cpup(p++);
+ __be32 *p;
- DECODE_TAIL;
+ p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(sessionid->data, p, sizeof(sessionid->data));
+ return nfs_ok;
}
+/* Defined in Appendix A of RFC 5531 */
static __be32
-nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
+nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
+ struct nfsd4_cb_sec *cbs)
{
- DECODE_HEAD;
+ u32 stamp, gidcount, uid, gid;
+ __be32 *p, status;
- READ_BUF(4);
- create->cr_type = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
+ return nfserr_bad_xdr;
+ /* machine name */
+ status = nfsd4_decode_ignored_string(argp, 255);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
+ return nfserr_bad_xdr;
+ if (gidcount > 16)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, gidcount << 2);
+ if (!p)
+ return nfserr_bad_xdr;
+ if (cbs->flavor == (u32)(-1)) {
+ struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
+
+ kuid_t kuid = make_kuid(userns, uid);
+ kgid_t kgid = make_kgid(userns, gid);
+ if (uid_valid(kuid) && gid_valid(kgid)) {
+ cbs->uid = kuid;
+ cbs->gid = kgid;
+ cbs->flavor = RPC_AUTH_UNIX;
+ } else {
+ dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
+ }
+ }
+
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_cb_sec *cbs)
+{
+ __be32 status;
+ u32 service;
+
+ dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
+
+ if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
+ return nfserr_bad_xdr;
+ if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
+ return nfserr_bad_xdr;
+ /* gcbp_handle_from_server */
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+ /* gcbp_handle_from_client */
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+
+ return nfs_ok;
+}
+
+/* a counted array of callback_sec_parms4 items */
+static __be32
+nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
+{
+ u32 i, secflavor, nr_secflavs;
+ __be32 status;
+
+ /* callback_sec_params4 */
+ if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
+ return nfserr_bad_xdr;
+ if (nr_secflavs)
+ cbs->flavor = (u32)(-1);
+ else
+ /* Is this legal? Be generous, take it to mean AUTH_NONE: */
+ cbs->flavor = 0;
+
+ for (i = 0; i < nr_secflavs; ++i) {
+ if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
+ return nfserr_bad_xdr;
+ switch (secflavor) {
+ case RPC_AUTH_NULL:
+ /* void */
+ if (cbs->flavor == (u32)(-1))
+ cbs->flavor = RPC_AUTH_NULL;
+ break;
+ case RPC_AUTH_UNIX:
+ status = nfsd4_decode_authsys_parms(argp, cbs);
+ if (status)
+ return status;
+ break;
+ case RPC_AUTH_GSS:
+ status = nfsd4_decode_gss_cb_handles4(argp, cbs);
+ if (status)
+ return status;
+ break;
+ default:
+ return nfserr_inval;
+ }
+ }
+
+ return nfs_ok;
+}
+
+
+/*
+ * NFSv4 operation argument decoders
+ */
+
+static __be32
+nfsd4_decode_access(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_access *access = &u->access;
+ if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
+ return nfserr_bad_xdr;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
+{
+ struct nfsd4_close *close = &u->close;
+ if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_stateid4(argp, &close->cl_stateid);
+}
+
+
+static __be32
+nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
+{
+ struct nfsd4_commit *commit = &u->commit;
+ if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
+ return nfserr_bad_xdr;
+ memset(&commit->co_verf, 0, sizeof(commit->co_verf));
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
+{
+ struct nfsd4_create *create = &u->create;
+ __be32 *p, status;
+
+ memset(create, 0, sizeof(*create));
+ if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
+ return nfserr_bad_xdr;
switch (create->cr_type) {
case NF4LNK:
- READ_BUF(4);
- create->cr_datalen = be32_to_cpup(p++);
- READ_BUF(create->cr_datalen);
+ if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, create->cr_datalen);
+ if (!p)
+ return nfserr_bad_xdr;
create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
if (!create->cr_data)
return nfserr_jukebox;
break;
case NF4BLK:
case NF4CHR:
- READ_BUF(8);
- create->cr_specdata1 = be32_to_cpup(p++);
- create->cr_specdata2 = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
+ return nfserr_bad_xdr;
break;
case NF4SOCK:
case NF4FIFO:
@@ -720,151 +833,221 @@ nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create
default:
break;
}
-
- READ_BUF(4);
- create->cr_namelen = be32_to_cpup(p++);
- READ_BUF(create->cr_namelen);
- SAVEMEM(create->cr_name, create->cr_namelen);
- if ((status = check_filename(create->cr_name, create->cr_namelen)))
+ status = nfsd4_decode_component4(argp, &create->cr_name,
+ &create->cr_namelen);
+ if (status)
return status;
-
- status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
- &create->cr_acl, &create->cr_label,
- &create->cr_umask);
+ status = nfsd4_decode_fattr4(argp, create->cr_bmval,
+ ARRAY_SIZE(create->cr_bmval),
+ &create->cr_iattr, &create->cr_acl,
+ &create->cr_label, &create->cr_umask);
if (status)
- goto out;
+ return status;
- DECODE_TAIL;
+ return nfs_ok;
}
static inline __be32
-nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
+nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- return nfsd4_decode_stateid(argp, &dr->dr_stateid);
+ struct nfsd4_delegreturn *dr = &u->delegreturn;
+ return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
}
static inline __be32
-nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
+nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
+ struct nfsd4_getattr *getattr = &u->getattr;
+ memset(getattr, 0, sizeof(*getattr));
+ return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
+ ARRAY_SIZE(getattr->ga_bmval));
}
static __be32
-nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
+nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_link *link = &u->link;
+ memset(link, 0, sizeof(*link));
+ return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
+}
- READ_BUF(4);
- link->li_namelen = be32_to_cpup(p++);
- READ_BUF(link->li_namelen);
- SAVEMEM(link->li_name, link->li_namelen);
- if ((status = check_filename(link->li_name, link->li_namelen)))
- return status;
+static __be32
+nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_lock *lock)
+{
+ __be32 status;
- DECODE_TAIL;
+ if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
+ &lock->lk_new_owner);
}
static __be32
-nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
+nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_lock *lock)
{
- DECODE_HEAD;
+ __be32 status;
- /*
- * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
- */
- READ_BUF(28);
- lock->lk_type = be32_to_cpup(p++);
- if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
- goto xdr_error;
- lock->lk_reclaim = be32_to_cpup(p++);
- p = xdr_decode_hyper(p, &lock->lk_offset);
- p = xdr_decode_hyper(p, &lock->lk_length);
- lock->lk_is_new = be32_to_cpup(p++);
-
- if (lock->lk_is_new) {
- READ_BUF(4);
- lock->lk_new_open_seqid = be32_to_cpup(p++);
- status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
- if (status)
- return status;
- READ_BUF(8 + sizeof(clientid_t));
- lock->lk_new_lock_seqid = be32_to_cpup(p++);
- COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
- lock->lk_new_owner.len = be32_to_cpup(p++);
- READ_BUF(lock->lk_new_owner.len);
- READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
- } else {
- status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
- if (status)
- return status;
- READ_BUF(4);
- lock->lk_old_lock_seqid = be32_to_cpup(p++);
- }
+ status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
+ return nfserr_bad_xdr;
- DECODE_TAIL;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
+{
+ if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
+ return nfserr_bad_xdr;
+ if (lock->lk_is_new)
+ return nfsd4_decode_open_to_lock_owner4(argp, lock);
+ return nfsd4_decode_exist_lock_owner4(argp, lock);
}
static __be32
-nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
+nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- READ_BUF(32);
- lockt->lt_type = be32_to_cpup(p++);
- if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
- goto xdr_error;
- p = xdr_decode_hyper(p, &lockt->lt_offset);
- p = xdr_decode_hyper(p, &lockt->lt_length);
- COPYMEM(&lockt->lt_clientid, 8);
- lockt->lt_owner.len = be32_to_cpup(p++);
- READ_BUF(lockt->lt_owner.len);
- READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
+ struct nfsd4_lock *lock = &u->lock;
+ memset(lock, 0, sizeof(*lock));
+ if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
+ return nfserr_bad_xdr;
+ if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_locker4(argp, lock);
+}
- DECODE_TAIL;
+static __be32
+nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
+{
+ struct nfsd4_lockt *lockt = &u->lockt;
+ memset(lockt, 0, sizeof(*lockt));
+ if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
+ return nfserr_bad_xdr;
+ if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
+ &lockt->lt_owner);
}
static __be32
-nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
+nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_locku *locku = &u->locku;
+ __be32 status;
- READ_BUF(8);
- locku->lu_type = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
+ return nfserr_bad_xdr;
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
- goto xdr_error;
- locku->lu_seqid = be32_to_cpup(p++);
- status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
if (status)
return status;
- READ_BUF(16);
- p = xdr_decode_hyper(p, &locku->lu_offset);
- p = xdr_decode_hyper(p, &locku->lu_length);
+ if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
+ return nfserr_bad_xdr;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
+nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_lookup *lookup = &u->lookup;
+ return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
+}
- READ_BUF(4);
- lookup->lo_len = be32_to_cpup(p++);
- READ_BUF(lookup->lo_len);
- SAVEMEM(lookup->lo_name, lookup->lo_len);
- if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
- return status;
+static __be32
+nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
+{
+ __be32 status;
+
+ if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
+ return nfserr_bad_xdr;
+ switch (open->op_createmode) {
+ case NFS4_CREATE_UNCHECKED:
+ case NFS4_CREATE_GUARDED:
+ status = nfsd4_decode_fattr4(argp, open->op_bmval,
+ ARRAY_SIZE(open->op_bmval),
+ &open->op_iattr, &open->op_acl,
+ &open->op_label, &open->op_umask);
+ if (status)
+ return status;
+ break;
+ case NFS4_CREATE_EXCLUSIVE:
+ status = nfsd4_decode_verifier4(argp, &open->op_verf);
+ if (status)
+ return status;
+ break;
+ case NFS4_CREATE_EXCLUSIVE4_1:
+ if (argp->minorversion < 1)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_verifier4(argp, &open->op_verf);
+ if (status)
+ return status;
+ status = nfsd4_decode_fattr4(argp, open->op_bmval,
+ ARRAY_SIZE(open->op_bmval),
+ &open->op_iattr, &open->op_acl,
+ &open->op_label, &open->op_umask);
+ if (status)
+ return status;
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
+
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
+{
+ __be32 status;
+
+ if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
+ return nfserr_bad_xdr;
+ switch (open->op_create) {
+ case NFS4_OPEN_NOCREATE:
+ break;
+ case NFS4_OPEN_CREATE:
+ status = nfsd4_decode_createhow4(argp, open);
+ if (status)
+ return status;
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
{
- __be32 *p;
u32 w;
- READ_BUF(4);
- w = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
+ return nfserr_bad_xdr;
*share_access = w & NFS4_SHARE_ACCESS_MASK;
*deleg_want = w & NFS4_SHARE_WANT_MASK;
if (deleg_when)
@@ -907,930 +1090,935 @@ static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *sh
NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
return nfs_ok;
}
-xdr_error:
return nfserr_bad_xdr;
}
static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
{
- __be32 *p;
-
- READ_BUF(4);
- *x = be32_to_cpup(p++);
- /* Note: unlinke access bits, deny bits may be zero. */
- if (*x & ~NFS4_SHARE_DENY_BOTH)
+ if (xdr_stream_decode_u32(argp->xdr, x) < 0)
return nfserr_bad_xdr;
- return nfs_ok;
-xdr_error:
- return nfserr_bad_xdr;
-}
-
-static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
-{
- __be32 *p;
-
- READ_BUF(4);
- o->len = be32_to_cpup(p++);
-
- if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
+ /* Note: unlike access bits, deny bits may be zero. */
+ if (*x & ~NFS4_SHARE_DENY_BOTH)
return nfserr_bad_xdr;
- READ_BUF(o->len);
- SAVEMEM(o->data, o->len);
return nfs_ok;
-xdr_error:
- return nfserr_bad_xdr;
}
static __be32
-nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
+nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_open *open)
{
- DECODE_HEAD;
- u32 dummy;
-
- memset(open->op_bmval, 0, sizeof(open->op_bmval));
- open->op_iattr.ia_valid = 0;
- open->op_openowner = NULL;
-
- open->op_xdr_error = 0;
- /* seqid, share_access, share_deny, clientid, ownerlen */
- READ_BUF(4);
- open->op_seqid = be32_to_cpup(p++);
- /* decode, yet ignore deleg_when until supported */
- status = nfsd4_decode_share_access(argp, &open->op_share_access,
- &open->op_deleg_want, &dummy);
- if (status)
- goto xdr_error;
- status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
- if (status)
- goto xdr_error;
- READ_BUF(sizeof(clientid_t));
- COPYMEM(&open->op_clientid, sizeof(clientid_t));
- status = nfsd4_decode_opaque(argp, &open->op_owner);
- if (status)
- goto xdr_error;
- READ_BUF(4);
- open->op_create = be32_to_cpup(p++);
- switch (open->op_create) {
- case NFS4_OPEN_NOCREATE:
- break;
- case NFS4_OPEN_CREATE:
- READ_BUF(4);
- open->op_createmode = be32_to_cpup(p++);
- switch (open->op_createmode) {
- case NFS4_CREATE_UNCHECKED:
- case NFS4_CREATE_GUARDED:
- status = nfsd4_decode_fattr(argp, open->op_bmval,
- &open->op_iattr, &open->op_acl, &open->op_label,
- &open->op_umask);
- if (status)
- goto out;
- break;
- case NFS4_CREATE_EXCLUSIVE:
- READ_BUF(NFS4_VERIFIER_SIZE);
- COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
- break;
- case NFS4_CREATE_EXCLUSIVE4_1:
- if (argp->minorversion < 1)
- goto xdr_error;
- READ_BUF(NFS4_VERIFIER_SIZE);
- COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
- status = nfsd4_decode_fattr(argp, open->op_bmval,
- &open->op_iattr, &open->op_acl, &open->op_label,
- &open->op_umask);
- if (status)
- goto out;
- break;
- default:
- goto xdr_error;
- }
- break;
- default:
- goto xdr_error;
- }
+ __be32 status;
- /* open_claim */
- READ_BUF(4);
- open->op_claim_type = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
+ return nfserr_bad_xdr;
switch (open->op_claim_type) {
case NFS4_OPEN_CLAIM_NULL:
case NFS4_OPEN_CLAIM_DELEGATE_PREV:
- READ_BUF(4);
- open->op_fname.len = be32_to_cpup(p++);
- READ_BUF(open->op_fname.len);
- SAVEMEM(open->op_fname.data, open->op_fname.len);
- if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
+ status = nfsd4_decode_component4(argp, &open->op_fname,
+ &open->op_fnamelen);
+ if (status)
return status;
break;
case NFS4_OPEN_CLAIM_PREVIOUS:
- READ_BUF(4);
- open->op_delegate_type = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
+ return nfserr_bad_xdr;
break;
case NFS4_OPEN_CLAIM_DELEGATE_CUR:
- status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
+ status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
if (status)
return status;
- READ_BUF(4);
- open->op_fname.len = be32_to_cpup(p++);
- READ_BUF(open->op_fname.len);
- SAVEMEM(open->op_fname.data, open->op_fname.len);
- if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
+ status = nfsd4_decode_component4(argp, &open->op_fname,
+ &open->op_fnamelen);
+ if (status)
return status;
break;
case NFS4_OPEN_CLAIM_FH:
case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
if (argp->minorversion < 1)
- goto xdr_error;
+ return nfserr_bad_xdr;
/* void */
break;
case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
if (argp->minorversion < 1)
- goto xdr_error;
- status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
if (status)
return status;
break;
default:
- goto xdr_error;
+ return nfserr_bad_xdr;
}
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
+nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_open *open = &u->open;
+ __be32 status;
+ u32 dummy;
- if (argp->minorversion >= 1)
- return nfserr_notsupp;
+ memset(open, 0, sizeof(*open));
- status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
+ if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
+ return nfserr_bad_xdr;
+ /* deleg_want is ignored */
+ status = nfsd4_decode_share_access(argp, &open->op_share_access,
+ &open->op_deleg_want, &dummy);
if (status)
return status;
- READ_BUF(4);
- open_conf->oc_seqid = be32_to_cpup(p++);
-
- DECODE_TAIL;
-}
-
-static __be32
-nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
-{
- DECODE_HEAD;
-
- status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
+ status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
if (status)
return status;
- READ_BUF(4);
- open_down->od_seqid = be32_to_cpup(p++);
- status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
- &open_down->od_deleg_want, NULL);
+ status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
+ &open->op_owner);
if (status)
return status;
- status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
+ status = nfsd4_decode_openflag4(argp, open);
if (status)
return status;
- DECODE_TAIL;
+ return nfsd4_decode_open_claim4(argp, open);
}
static __be32
-nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
+nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- READ_BUF(4);
- putfh->pf_fhlen = be32_to_cpup(p++);
- if (putfh->pf_fhlen > NFS4_FHSIZE)
- goto xdr_error;
- READ_BUF(putfh->pf_fhlen);
- SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
+ struct nfsd4_open_confirm *open_conf = &u->open_confirm;
+ __be32 status;
- DECODE_TAIL;
-}
+ if (argp->minorversion >= 1)
+ return nfserr_notsupp;
-static __be32
-nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
-{
- if (argp->minorversion == 0)
- return nfs_ok;
- return nfserr_notsupp;
+ status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
+ return nfserr_bad_xdr;
+
+ memset(&open_conf->oc_resp_stateid, 0,
+ sizeof(open_conf->oc_resp_stateid));
+ return nfs_ok;
}
static __be32
-nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
+nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_open_downgrade *open_down = &u->open_downgrade;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, &read->rd_stateid);
+ memset(open_down, 0, sizeof(*open_down));
+ status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
if (status)
return status;
- READ_BUF(12);
- p = xdr_decode_hyper(p, &read->rd_offset);
- read->rd_length = be32_to_cpup(p++);
-
- DECODE_TAIL;
+ if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
+ return nfserr_bad_xdr;
+ /* deleg_want is ignored */
+ status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
+ &open_down->od_deleg_want, NULL);
+ if (status)
+ return status;
+ return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
}
static __be32
-nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
+nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_putfh *putfh = &u->putfh;
+ __be32 *p;
- READ_BUF(24);
- p = xdr_decode_hyper(p, &readdir->rd_cookie);
- COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
- readdir->rd_dircount = be32_to_cpup(p++);
- readdir->rd_maxcount = be32_to_cpup(p++);
- if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
- goto out;
+ if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
+ return nfserr_bad_xdr;
+ if (putfh->pf_fhlen > NFS4_FHSIZE)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
+ if (!p)
+ return nfserr_bad_xdr;
+ putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
+ if (!putfh->pf_fhval)
+ return nfserr_jukebox;
- DECODE_TAIL;
+ putfh->no_verify = false;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
+nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
{
- DECODE_HEAD;
-
- READ_BUF(4);
- remove->rm_namelen = be32_to_cpup(p++);
- READ_BUF(remove->rm_namelen);
- SAVEMEM(remove->rm_name, remove->rm_namelen);
- if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
- return status;
-
- DECODE_TAIL;
+ if (argp->minorversion == 0)
+ return nfs_ok;
+ return nfserr_notsupp;
}
static __be32
-nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
+nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_read *read = &u->read;
+ __be32 status;
- READ_BUF(4);
- rename->rn_snamelen = be32_to_cpup(p++);
- READ_BUF(rename->rn_snamelen);
- SAVEMEM(rename->rn_sname, rename->rn_snamelen);
- READ_BUF(4);
- rename->rn_tnamelen = be32_to_cpup(p++);
- READ_BUF(rename->rn_tnamelen);
- SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
- if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
- return status;
- if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
+ memset(read, 0, sizeof(*read));
+ status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
+ if (status)
return status;
+ if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
+ return nfserr_bad_xdr;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
+nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_readdir *readdir = &u->readdir;
+ __be32 status;
- if (argp->minorversion >= 1)
- return nfserr_notsupp;
+ memset(readdir, 0, sizeof(*readdir));
+ if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
+ ARRAY_SIZE(readdir->rd_bmval)) < 0)
+ return nfserr_bad_xdr;
- READ_BUF(sizeof(clientid_t));
- COPYMEM(clientid, sizeof(clientid_t));
+ return nfs_ok;
+}
- DECODE_TAIL;
+static __be32
+nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
+{
+ struct nfsd4_remove *remove = &u->remove;
+ memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo));
+ return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
}
static __be32
-nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
- struct nfsd4_secinfo *secinfo)
+nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_rename *rename = &u->rename;
+ __be32 status;
- READ_BUF(4);
- secinfo->si_namelen = be32_to_cpup(p++);
- READ_BUF(secinfo->si_namelen);
- SAVEMEM(secinfo->si_name, secinfo->si_namelen);
- status = check_filename(secinfo->si_name, secinfo->si_namelen);
+ memset(rename, 0, sizeof(*rename));
+ status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
if (status)
return status;
- DECODE_TAIL;
+ return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
}
static __be32
-nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
- struct nfsd4_secinfo_no_name *sin)
+nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ clientid_t *clientid = &u->renew;
+ return nfsd4_decode_clientid4(argp, clientid);
+}
- READ_BUF(4);
- sin->sin_style = be32_to_cpup(p++);
- DECODE_TAIL;
+static __be32
+nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_secinfo *secinfo = &u->secinfo;
+ secinfo->si_exp = NULL;
+ return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
}
static __be32
-nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
+nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
+ struct nfsd4_setattr *setattr = &u->setattr;
__be32 status;
- status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
+ memset(setattr, 0, sizeof(*setattr));
+ status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
if (status)
return status;
- return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
- &setattr->sa_acl, &setattr->sa_label, NULL);
+ return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
+ ARRAY_SIZE(setattr->sa_bmval),
+ &setattr->sa_iattr, &setattr->sa_acl,
+ &setattr->sa_label, NULL);
}
static __be32
-nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
+nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_setclientid *setclientid = &u->setclientid;
+ __be32 *p, status;
+
+ memset(setclientid, 0, sizeof(*setclientid));
if (argp->minorversion >= 1)
return nfserr_notsupp;
- READ_BUF(NFS4_VERIFIER_SIZE);
- COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
-
+ status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
+ if (status)
+ return status;
status = nfsd4_decode_opaque(argp, &setclientid->se_name);
if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
+ if (!p)
return nfserr_bad_xdr;
- READ_BUF(8);
- setclientid->se_callback_prog = be32_to_cpup(p++);
- setclientid->se_callback_netid_len = be32_to_cpup(p++);
- READ_BUF(setclientid->se_callback_netid_len);
- SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
- READ_BUF(4);
- setclientid->se_callback_addr_len = be32_to_cpup(p++);
+ setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
+ setclientid->se_callback_netid_len);
+ if (!setclientid->se_callback_netid_val)
+ return nfserr_jukebox;
- READ_BUF(setclientid->se_callback_addr_len);
- SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
- READ_BUF(4);
- setclientid->se_callback_ident = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
+ if (!p)
+ return nfserr_bad_xdr;
+ setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
+ setclientid->se_callback_addr_len);
+ if (!setclientid->se_callback_addr_val)
+ return nfserr_jukebox;
+ if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
+ return nfserr_bad_xdr;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
+nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm;
+ __be32 status;
if (argp->minorversion >= 1)
return nfserr_notsupp;
- READ_BUF(8 + NFS4_VERIFIER_SIZE);
- COPYMEM(&scd_c->sc_clientid, 8);
- COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
-
- DECODE_TAIL;
+ status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
+ if (status)
+ return status;
+ return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
}
/* Also used for NVERIFY */
static __be32
-nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
+nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_verify *verify = &u->verify;
+ __be32 *p, status;
- if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
- goto out;
+ memset(verify, 0, sizeof(*verify));
+
+ status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
+ ARRAY_SIZE(verify->ve_bmval));
+ if (status)
+ return status;
/* For convenience's sake, we compare raw xdr'd attributes in
* nfsd4_proc_verify */
- READ_BUF(4);
- verify->ve_attrlen = be32_to_cpup(p++);
- READ_BUF(verify->ve_attrlen);
- SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
+ if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
+ if (!p)
+ return nfserr_bad_xdr;
+ verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
+ if (!verify->ve_attrval)
+ return nfserr_jukebox;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
+nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_write *write = &u->write;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, &write->wr_stateid);
+ status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
if (status)
return status;
- READ_BUF(16);
- p = xdr_decode_hyper(p, &write->wr_offset);
- write->wr_stable_how = be32_to_cpup(p++);
+ if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
+ return nfserr_bad_xdr;
if (write->wr_stable_how > NFS_FILE_SYNC)
- goto xdr_error;
- write->wr_buflen = be32_to_cpup(p++);
-
- status = svcxdr_construct_vector(argp, &write->wr_head,
- &write->wr_pagelist, write->wr_buflen);
- if (status)
- return status;
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
+ return nfserr_bad_xdr;
+ if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
+ return nfserr_bad_xdr;
- DECODE_TAIL;
+ write->wr_bytes_written = 0;
+ write->wr_how_written = 0;
+ memset(&write->wr_verifier, 0, sizeof(write->wr_verifier));
+ return nfs_ok;
}
static __be32
-nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
+nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
+ __be32 status;
if (argp->minorversion >= 1)
return nfserr_notsupp;
- READ_BUF(12);
- COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
- rlockowner->rl_owner.len = be32_to_cpup(p++);
- READ_BUF(rlockowner->rl_owner.len);
- READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
+ status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
+ &rlockowner->rl_owner);
+ if (status)
+ return status;
if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
return nfserr_inval;
- DECODE_TAIL;
+
+ return nfs_ok;
+}
+
+static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
+ memset(bc, 0, sizeof(*bc));
+ if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
+}
+
+static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
+ u32 use_conn_in_rdma_mode;
+ __be32 status;
+
+ memset(bcts, 0, sizeof(*bcts));
+ status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
+ return nfserr_bad_xdr;
+
+ return nfs_ok;
}
static __be32
-nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
- struct nfsd4_exchange_id *exid)
+nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
{
- int dummy, tmp;
- DECODE_HEAD;
+ __be32 status;
- READ_BUF(NFS4_VERIFIER_SIZE);
- COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
+ status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
+ ARRAY_SIZE(exid->spo_must_enforce));
+ if (status)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
+ ARRAY_SIZE(exid->spo_must_allow));
+ if (status)
+ return nfserr_bad_xdr;
- status = nfsd4_decode_opaque(argp, &exid->clname);
+ return nfs_ok;
+}
+
+/*
+ * This implementation currently does not support SP4_SSV.
+ * This decoder simply skips over these arguments.
+ */
+static noinline __be32
+nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
+{
+ u32 count, window, num_gss_handles;
+ __be32 status;
+
+ /* ssp_ops */
+ status = nfsd4_decode_state_protect_ops(argp, exid);
if (status)
+ return status;
+
+ /* ssp_hash_algs<> */
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
return nfserr_bad_xdr;
+ while (count--) {
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+ }
- READ_BUF(4);
- exid->flags = be32_to_cpup(p++);
+ /* ssp_encr_algs<> */
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+ while (count--) {
+ status = nfsd4_decode_ignored_string(argp, 0);
+ if (status)
+ return status;
+ }
+
+ if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
+ return nfserr_bad_xdr;
+
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
+{
+ __be32 status;
- /* Ignore state_protect4_a */
- READ_BUF(4);
- exid->spa_how = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
+ return nfserr_bad_xdr;
switch (exid->spa_how) {
case SP4_NONE:
break;
case SP4_MACH_CRED:
- /* spo_must_enforce */
- status = nfsd4_decode_bitmap(argp,
- exid->spo_must_enforce);
- if (status)
- goto out;
- /* spo_must_allow */
- status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
+ status = nfsd4_decode_state_protect_ops(argp, exid);
if (status)
- goto out;
+ return status;
break;
case SP4_SSV:
- /* ssp_ops */
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy * 4);
- p += dummy;
-
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy * 4);
- p += dummy;
-
- /* ssp_hash_algs<> */
- READ_BUF(4);
- tmp = be32_to_cpup(p++);
- while (tmp--) {
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- }
-
- /* ssp_encr_algs<> */
- READ_BUF(4);
- tmp = be32_to_cpup(p++);
- while (tmp--) {
- READ_BUF(4);
- dummy = be32_to_cpup(p++);
- READ_BUF(dummy);
- p += XDR_QUADLEN(dummy);
- }
-
- /* ignore ssp_window and ssp_num_gss_handles: */
- READ_BUF(8);
+ status = nfsd4_decode_ssv_sp_parms(argp, exid);
+ if (status)
+ return status;
break;
default:
- goto xdr_error;
+ return nfserr_bad_xdr;
}
- READ_BUF(4); /* nfs_impl_id4 array length */
- dummy = be32_to_cpup(p++);
+ return nfs_ok;
+}
- if (dummy > 1)
- goto xdr_error;
+static __be32
+nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_exchange_id *exid)
+{
+ __be32 status;
+ u32 count;
- if (dummy == 1) {
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+ switch (count) {
+ case 0:
+ break;
+ case 1:
+ /* Note that RFC 8881 places no length limit on
+ * nii_domain, but this implementation permits no
+ * more than NFS4_OPAQUE_LIMIT bytes */
status = nfsd4_decode_opaque(argp, &exid->nii_domain);
if (status)
- goto xdr_error;
-
- /* nii_name */
+ return status;
+ /* Note that RFC 8881 places no length limit on
+ * nii_name, but this implementation permits no
+ * more than NFS4_OPAQUE_LIMIT bytes */
status = nfsd4_decode_opaque(argp, &exid->nii_name);
if (status)
- goto xdr_error;
-
- /* nii_date */
- status = nfsd4_decode_time(argp, &exid->nii_time);
+ return status;
+ status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
if (status)
- goto xdr_error;
+ return status;
+ break;
+ default:
+ return nfserr_bad_xdr;
}
- DECODE_TAIL;
-}
-static __be32
-nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
- struct nfsd4_create_session *sess)
-{
- DECODE_HEAD;
-
- READ_BUF(16);
- COPYMEM(&sess->clientid, 8);
- sess->seqid = be32_to_cpup(p++);
- sess->flags = be32_to_cpup(p++);
-
- /* Fore channel attrs */
- READ_BUF(28);
- p++; /* headerpadsz is always 0 */
- sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
- sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
- sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
- sess->fore_channel.maxops = be32_to_cpup(p++);
- sess->fore_channel.maxreqs = be32_to_cpup(p++);
- sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
- if (sess->fore_channel.nr_rdma_attrs == 1) {
- READ_BUF(4);
- sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
- } else if (sess->fore_channel.nr_rdma_attrs > 1) {
- dprintk("Too many fore channel attr bitmaps!\n");
- goto xdr_error;
- }
-
- /* Back channel attrs */
- READ_BUF(28);
- p++; /* headerpadsz is always 0 */
- sess->back_channel.maxreq_sz = be32_to_cpup(p++);
- sess->back_channel.maxresp_sz = be32_to_cpup(p++);
- sess->back_channel.maxresp_cached = be32_to_cpup(p++);
- sess->back_channel.maxops = be32_to_cpup(p++);
- sess->back_channel.maxreqs = be32_to_cpup(p++);
- sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
- if (sess->back_channel.nr_rdma_attrs == 1) {
- READ_BUF(4);
- sess->back_channel.rdma_attrs = be32_to_cpup(p++);
- } else if (sess->back_channel.nr_rdma_attrs > 1) {
- dprintk("Too many back channel attr bitmaps!\n");
- goto xdr_error;
- }
-
- READ_BUF(4);
- sess->callback_prog = be32_to_cpup(p++);
- nfsd4_decode_cb_sec(argp, &sess->cb_sec);
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
- struct nfsd4_destroy_session *destroy_session)
+nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
- READ_BUF(NFS4_MAX_SESSIONID_LEN);
- COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
+ struct nfsd4_exchange_id *exid = &u->exchange_id;
+ __be32 status;
- DECODE_TAIL;
+ memset(exid, 0, sizeof(*exid));
+ status = nfsd4_decode_verifier4(argp, &exid->verifier);
+ if (status)
+ return status;
+ status = nfsd4_decode_opaque(argp, &exid->clname);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_state_protect4_a(argp, exid);
+ if (status)
+ return status;
+ return nfsd4_decode_nfs_impl_id4(argp, exid);
}
static __be32
-nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
- struct nfsd4_free_stateid *free_stateid)
+nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
+ struct nfsd4_channel_attrs *ca)
{
- DECODE_HEAD;
-
- READ_BUF(sizeof(stateid_t));
- free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
- COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
-
- DECODE_TAIL;
-}
+ __be32 *p;
-static __be32
-nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
- struct nfsd4_sequence *seq)
-{
- DECODE_HEAD;
+ p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
+ if (!p)
+ return nfserr_bad_xdr;
- READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
- COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
- seq->seqid = be32_to_cpup(p++);
- seq->slotid = be32_to_cpup(p++);
- seq->maxslots = be32_to_cpup(p++);
- seq->cachethis = be32_to_cpup(p++);
+ /* headerpadsz is ignored */
+ p++;
+ ca->maxreq_sz = be32_to_cpup(p++);
+ ca->maxresp_sz = be32_to_cpup(p++);
+ ca->maxresp_cached = be32_to_cpup(p++);
+ ca->maxops = be32_to_cpup(p++);
+ ca->maxreqs = be32_to_cpup(p++);
+ ca->nr_rdma_attrs = be32_to_cpup(p);
+ switch (ca->nr_rdma_attrs) {
+ case 0:
+ break;
+ case 1:
+ if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
+ return nfserr_bad_xdr;
+ break;
+ default:
+ return nfserr_bad_xdr;
+ }
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
+nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- int i;
- __be32 *p, status;
- struct nfsd4_test_stateid_id *stateid;
-
- READ_BUF(4);
- test_stateid->ts_num_ids = ntohl(*p++);
-
- INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
-
- for (i = 0; i < test_stateid->ts_num_ids; i++) {
- stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
- if (!stateid) {
- status = nfserrno(-ENOMEM);
- goto out;
- }
-
- INIT_LIST_HEAD(&stateid->ts_id_list);
- list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
-
- status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
- if (status)
- goto out;
- }
+ struct nfsd4_create_session *sess = &u->create_session;
+ __be32 status;
- status = 0;
-out:
- return status;
-xdr_error:
- dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
- status = nfserr_bad_xdr;
- goto out;
+ memset(sess, 0, sizeof(*sess));
+ status = nfsd4_decode_clientid4(argp, &sess->clientid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
+ if (status)
+ return status;
+ status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_cb_sec(argp, &sess->cb_sec);
}
-static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
+static __be32
+nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- READ_BUF(8);
- COPYMEM(&dc->clientid, 8);
-
- DECODE_TAIL;
+ struct nfsd4_destroy_session *destroy_session = &u->destroy_session;
+ return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
}
-static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
+static __be32
+nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- READ_BUF(4);
- rc->rca_one_fs = be32_to_cpup(p++);
-
- DECODE_TAIL;
+ struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
+ return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
}
#ifdef CONFIG_NFSD_PNFS
static __be32
nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
- struct nfsd4_getdeviceinfo *gdev)
-{
- DECODE_HEAD;
- u32 num, i;
-
- READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
- COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
- gdev->gd_layout_type = be32_to_cpup(p++);
- gdev->gd_maxcount = be32_to_cpup(p++);
- num = be32_to_cpup(p++);
- if (num) {
- if (num > 1000)
- goto xdr_error;
- READ_BUF(4 * num);
- gdev->gd_notify_types = be32_to_cpup(p++);
- for (i = 1; i < num; i++) {
- if (be32_to_cpup(p++)) {
- status = nfserr_inval;
- goto out;
- }
- }
- }
- DECODE_TAIL;
-}
-
-static __be32
-nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
- struct nfsd4_layoutget *lgp)
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- READ_BUF(36);
- lgp->lg_signal = be32_to_cpup(p++);
- lgp->lg_layout_type = be32_to_cpup(p++);
- lgp->lg_seg.iomode = be32_to_cpup(p++);
- p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
- p = xdr_decode_hyper(p, &lgp->lg_seg.length);
- p = xdr_decode_hyper(p, &lgp->lg_minlength);
+ struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
+ memset(gdev, 0, sizeof(*gdev));
+ status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
if (status)
return status;
+ if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_uint32_array(argp->xdr,
+ &gdev->gd_notify_types, 1) < 0)
+ return nfserr_bad_xdr;
- READ_BUF(4);
- lgp->lg_maxcount = be32_to_cpup(p++);
-
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
- struct nfsd4_layoutcommit *lcp)
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
- u32 timechange;
-
- READ_BUF(20);
- p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
- p = xdr_decode_hyper(p, &lcp->lc_seg.length);
- lcp->lc_reclaim = be32_to_cpup(p++);
+ struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
+ __be32 *p, status;
- status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
+ memset(lcp, 0, sizeof(*lcp));
+ if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
if (status)
return status;
-
- READ_BUF(4);
- lcp->lc_newoffset = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
+ return nfserr_bad_xdr;
if (lcp->lc_newoffset) {
- READ_BUF(8);
- p = xdr_decode_hyper(p, &lcp->lc_last_wr);
+ if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
+ return nfserr_bad_xdr;
} else
lcp->lc_last_wr = 0;
- READ_BUF(4);
- timechange = be32_to_cpup(p++);
- if (timechange) {
- status = nfsd4_decode_time(argp, &lcp->lc_mtime);
+ p = xdr_inline_decode(argp->xdr, XDR_UNIT);
+ if (!p)
+ return nfserr_bad_xdr;
+ if (xdr_item_is_present(p)) {
+ status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
if (status)
return status;
} else {
lcp->lc_mtime.tv_nsec = UTIME_NOW;
}
- READ_BUF(8);
- lcp->lc_layout_type = be32_to_cpup(p++);
+ return nfsd4_decode_layoutupdate4(argp, lcp);
+}
- /*
- * Save the layout update in XDR format and let the layout driver deal
- * with it later.
- */
- lcp->lc_up_len = be32_to_cpup(p++);
- if (lcp->lc_up_len > 0) {
- READ_BUF(lcp->lc_up_len);
- READMEM(lcp->lc_up_layout, lcp->lc_up_len);
- }
+static __be32
+nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_layoutget *lgp = &u->layoutget;
+ __be32 status;
- DECODE_TAIL;
+ memset(lgp, 0, sizeof(*lgp));
+ if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
+ return nfserr_bad_xdr;
+ status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
+ return nfserr_bad_xdr;
+
+ return nfs_ok;
}
static __be32
nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
- struct nfsd4_layoutreturn *lrp)
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
+ memset(lrp, 0, sizeof(*lrp));
+ if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
+ return nfserr_bad_xdr;
+ return nfsd4_decode_layoutreturn4(argp, lrp);
+}
+#endif /* CONFIG_NFSD_PNFS */
- READ_BUF(16);
- lrp->lr_reclaim = be32_to_cpup(p++);
- lrp->lr_layout_type = be32_to_cpup(p++);
- lrp->lr_seg.iomode = be32_to_cpup(p++);
- lrp->lr_return_type = be32_to_cpup(p++);
- if (lrp->lr_return_type == RETURN_FILE) {
- READ_BUF(16);
- p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
- p = xdr_decode_hyper(p, &lrp->lr_seg.length);
+static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name;
+ if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
+ return nfserr_bad_xdr;
- status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
- if (status)
- return status;
+ sin->sin_exp = NULL;
+ return nfs_ok;
+}
- READ_BUF(4);
- lrp->lrf_body_len = be32_to_cpup(p++);
- if (lrp->lrf_body_len > 0) {
- READ_BUF(lrp->lrf_body_len);
- READMEM(lrp->lrf_body, lrp->lrf_body_len);
- }
- } else {
- lrp->lr_seg.offset = 0;
- lrp->lr_seg.length = NFS4_MAX_UINT64;
+static __be32
+nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_sequence *seq = &u->sequence;
+ __be32 *p, status;
+
+ status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
+ if (status)
+ return status;
+ p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
+ if (!p)
+ return nfserr_bad_xdr;
+ seq->seqid = be32_to_cpup(p++);
+ seq->slotid = be32_to_cpup(p++);
+ seq->maxslots = be32_to_cpup(p++);
+ seq->cachethis = be32_to_cpup(p);
+
+ seq->status_flags = 0;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
+ struct nfsd4_test_stateid_id *stateid;
+ __be32 status;
+ u32 i;
+
+ memset(test_stateid, 0, sizeof(*test_stateid));
+ if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
+ return nfserr_bad_xdr;
+
+ INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
+ for (i = 0; i < test_stateid->ts_num_ids; i++) {
+ stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
+ if (!stateid)
+ return nfserr_jukebox;
+ INIT_LIST_HEAD(&stateid->ts_id_list);
+ list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
+ status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
+ if (status)
+ return status;
}
- DECODE_TAIL;
+ return nfs_ok;
}
-#endif /* CONFIG_NFSD_PNFS */
-static __be32
-nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
- struct nfsd4_fallocate *fallocate)
+static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
-
- status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
- if (status)
- return status;
-
- READ_BUF(16);
- p = xdr_decode_hyper(p, &fallocate->falloc_offset);
- xdr_decode_hyper(p, &fallocate->falloc_length);
+ struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
+ return nfsd4_decode_clientid4(argp, &dc->clientid);
+}
- DECODE_TAIL;
+static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
+ if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
+ return nfserr_bad_xdr;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
+nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_fallocate *fallocate = &u->allocate;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
- if (status)
- return status;
- status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
+ status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
if (status)
return status;
+ if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
+ return nfserr_bad_xdr;
- READ_BUF(8 + 8 + 8);
- p = xdr_decode_hyper(p, &clone->cl_src_pos);
- p = xdr_decode_hyper(p, &clone->cl_dst_pos);
- p = xdr_decode_hyper(p, &clone->cl_count);
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
struct nl4_server *ns)
{
- DECODE_HEAD;
struct nfs42_netaddr *naddr;
+ __be32 *p;
- READ_BUF(4);
- ns->nl4_type = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
+ return nfserr_bad_xdr;
/* currently support for 1 inter-server source server */
switch (ns->nl4_type) {
case NL4_NETADDR:
naddr = &ns->u.nl4_addr;
- READ_BUF(4);
- naddr->netid_len = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
+ return nfserr_bad_xdr;
if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
- goto xdr_error;
+ return nfserr_bad_xdr;
- READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
- COPYMEM(naddr->netid, naddr->netid_len);
+ p = xdr_inline_decode(argp->xdr, naddr->netid_len);
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(naddr->netid, p, naddr->netid_len);
- naddr->addr_len = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
+ return nfserr_bad_xdr;
if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
- goto xdr_error;
+ return nfserr_bad_xdr;
- READ_BUF(naddr->addr_len);
- COPYMEM(naddr->addr, naddr->addr_len);
+ p = xdr_inline_decode(argp->xdr, naddr->addr_len);
+ if (!p)
+ return nfserr_bad_xdr;
+ memcpy(naddr->addr, p, naddr->addr_len);
break;
default:
- goto xdr_error;
+ return nfserr_bad_xdr;
}
- DECODE_TAIL;
+
+ return nfs_ok;
}
static __be32
-nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
+nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_copy *copy = &u->copy;
+ u32 consecutive, i, count, sync;
struct nl4_server *ns_dummy;
- int i, count;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
+ memset(copy, 0, sizeof(*copy));
+ status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
if (status)
return status;
- status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
+ status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
if (status)
return status;
+ if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
+ return nfserr_bad_xdr;
+ /* ca_consecutive: we always do consecutive copies */
+ if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
+ return nfserr_bad_xdr;
+ nfsd4_copy_set_sync(copy, sync);
- READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
- p = xdr_decode_hyper(p, ©->cp_src_pos);
- p = xdr_decode_hyper(p, ©->cp_dst_pos);
- p = xdr_decode_hyper(p, ©->cp_count);
- p++; /* ca_consecutive: we always do consecutive copies */
- copy->cp_synchronous = be32_to_cpup(p++);
-
- count = be32_to_cpup(p++);
-
- copy->cp_intra = false;
+ if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
+ return nfserr_bad_xdr;
+ copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
+ if (copy->cp_src == NULL)
+ return nfserr_jukebox;
if (count == 0) { /* intra-server copy */
- copy->cp_intra = true;
- goto intra;
+ __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
+ return nfs_ok;
}
- /* decode all the supplied server addresses but use first */
- status = nfsd4_decode_nl4_server(argp, ©->cp_src);
+ /* decode all the supplied server addresses but use only the first */
+ status = nfsd4_decode_nl4_server(argp, copy->cp_src);
if (status)
return status;
ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
if (ns_dummy == NULL)
- return nfserrno(-ENOMEM);
+ return nfserr_jukebox;
for (i = 0; i < count - 1; i++) {
status = nfsd4_decode_nl4_server(argp, ns_dummy);
if (status) {
@@ -1839,44 +2027,80 @@ nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
}
}
kfree(ns_dummy);
-intra:
- DECODE_TAIL;
+ return nfs_ok;
+}
+
+static __be32
+nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
+ union nfsd4_op_u *u)
+{
+ struct nfsd4_copy_notify *cn = &u->copy_notify;
+ __be32 status;
+
+ memset(cn, 0, sizeof(*cn));
+ cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
+ if (cn->cpn_src == NULL)
+ return nfserr_jukebox;
+ cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
+ if (cn->cpn_dst == NULL)
+ return nfserr_jukebox;
+
+ status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
+ if (status)
+ return status;
+ return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
}
static __be32
nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
- struct nfsd4_offload_status *os)
+ union nfsd4_op_u *u)
{
- return nfsd4_decode_stateid(argp, &os->stateid);
+ struct nfsd4_offload_status *os = &u->offload_status;
+ os->count = 0;
+ os->status = 0;
+ return nfsd4_decode_stateid4(argp, &os->stateid);
}
static __be32
-nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
- struct nfsd4_copy_notify *cn)
+nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
+ struct nfsd4_seek *seek = &u->seek;
__be32 status;
- status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
+ status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
if (status)
return status;
- return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
+ if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
+ return nfserr_bad_xdr;
+
+ seek->seek_eof = 0;
+ seek->seek_pos = 0;
+ return nfs_ok;
}
static __be32
-nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
+nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_clone *clone = &u->clone;
+ __be32 status;
- status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
+ status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
if (status)
return status;
+ status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
+ if (status)
+ return status;
+ if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
+ return nfserr_bad_xdr;
+ if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
+ return nfserr_bad_xdr;
- READ_BUF(8 + 4);
- p = xdr_decode_hyper(p, &seek->seek_offset);
- seek->seek_whence = be32_to_cpup(p);
-
- DECODE_TAIL;
+ return nfs_ok;
}
/*
@@ -1889,13 +2113,14 @@ nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
*/
/*
- * Decode data into buffer. Uses head and pages constructed by
- * svcxdr_construct_vector.
+ * Decode data into buffer.
*/
static __be32
-nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
- struct page **pages, char **bufp, u32 buflen)
+nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
+ char **bufp, u32 buflen)
{
+ struct page **pages = xdr->pages;
+ struct kvec *head = xdr->head;
char *tmp, *dp;
u32 len;
@@ -1938,25 +2163,22 @@ nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
static __be32
nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
{
- DECODE_HEAD;
char *name, *sp, *dp;
u32 namelen, cnt;
+ __be32 *p;
- READ_BUF(4);
- namelen = be32_to_cpup(p++);
-
+ if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
+ return nfserr_bad_xdr;
if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
return nfserr_nametoolong;
-
if (namelen == 0)
- goto xdr_error;
-
- READ_BUF(namelen);
-
+ return nfserr_bad_xdr;
+ p = xdr_inline_decode(argp->xdr, namelen);
+ if (!p)
+ return nfserr_bad_xdr;
name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
if (!name)
return nfserr_jukebox;
-
memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
/*
@@ -1969,14 +2191,14 @@ nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
while (cnt-- > 0) {
if (*sp == '\0')
- goto xdr_error;
+ return nfserr_bad_xdr;
*dp++ = *sp++;
}
*dp = '\0';
*namep = name;
- DECODE_TAIL;
+ return nfs_ok;
}
/*
@@ -1987,11 +2209,13 @@ nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
*/
static __be32
nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
- struct nfsd4_getxattr *getxattr)
+ union nfsd4_op_u *u)
{
+ struct nfsd4_getxattr *getxattr = &u->getxattr;
__be32 status;
u32 maxcount;
+ memset(getxattr, 0, sizeof(*getxattr));
status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
if (status)
return status;
@@ -2000,21 +2224,21 @@ nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
getxattr->getxa_len = maxcount;
-
- return status;
+ return nfs_ok;
}
static __be32
nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
- struct nfsd4_setxattr *setxattr)
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_setxattr *setxattr = &u->setxattr;
u32 flags, maxcount, size;
- struct kvec head;
- struct page **pagelist;
+ __be32 status;
+
+ memset(setxattr, 0, sizeof(*setxattr));
- READ_BUF(4);
- flags = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
+ return nfserr_bad_xdr;
if (flags > SETXATTR4_REPLACE)
return nfserr_inval;
@@ -2027,33 +2251,35 @@ nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
maxcount = svc_max_payload(argp->rqstp);
maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
- READ_BUF(4);
- size = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
+ return nfserr_bad_xdr;
if (size > maxcount)
return nfserr_xattr2big;
setxattr->setxa_len = size;
if (size > 0) {
- status = svcxdr_construct_vector(argp, &head, &pagelist, size);
- if (status)
- return status;
+ struct xdr_buf payload;
- status = nfsd4_vbuf_from_vector(argp, &head, pagelist,
- &setxattr->setxa_buf, size);
+ if (!xdr_stream_subsegment(argp->xdr, &payload, size))
+ return nfserr_bad_xdr;
+ status = nfsd4_vbuf_from_vector(argp, &payload,
+ &setxattr->setxa_buf, size);
}
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
- struct nfsd4_listxattrs *listxattrs)
+ union nfsd4_op_u *u)
{
- DECODE_HEAD;
+ struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
u32 maxcount;
- READ_BUF(12);
- p = xdr_decode_hyper(p, &listxattrs->lsxa_cookie);
+ memset(listxattrs, 0, sizeof(*listxattrs));
+
+ if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
+ return nfserr_bad_xdr;
/*
* If the cookie is too large to have even one user.x attribute
@@ -2063,7 +2289,8 @@ nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
(XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
return nfserr_badcookie;
- maxcount = be32_to_cpup(p++);
+ if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
+ return nfserr_bad_xdr;
if (maxcount < 8)
/* Always need at least 2 words (length and one character) */
return nfserr_inval;
@@ -2071,117 +2298,119 @@ nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
maxcount = min(maxcount, svc_max_payload(argp->rqstp));
listxattrs->lsxa_maxcount = maxcount;
- DECODE_TAIL;
+ return nfs_ok;
}
static __be32
nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
- struct nfsd4_removexattr *removexattr)
+ union nfsd4_op_u *u)
{
+ struct nfsd4_removexattr *removexattr = &u->removexattr;
+ memset(removexattr, 0, sizeof(*removexattr));
return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
}
static __be32
-nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
+nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
{
return nfs_ok;
}
static __be32
-nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
+nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
{
return nfserr_notsupp;
}
-typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
+typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u);
static const nfsd4_dec nfsd4_dec_ops[] = {
- [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
- [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
- [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
- [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
- [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
- [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
- [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
- [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
- [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
- [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
- [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
- [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
- [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
- [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
- [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
- [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
- [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
- [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
- [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
- [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
- [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
- [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
- [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
- [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
- [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
- [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
- [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
- [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
- [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
- [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
+ [OP_ACCESS] = nfsd4_decode_access,
+ [OP_CLOSE] = nfsd4_decode_close,
+ [OP_COMMIT] = nfsd4_decode_commit,
+ [OP_CREATE] = nfsd4_decode_create,
+ [OP_DELEGPURGE] = nfsd4_decode_notsupp,
+ [OP_DELEGRETURN] = nfsd4_decode_delegreturn,
+ [OP_GETATTR] = nfsd4_decode_getattr,
+ [OP_GETFH] = nfsd4_decode_noop,
+ [OP_LINK] = nfsd4_decode_link,
+ [OP_LOCK] = nfsd4_decode_lock,
+ [OP_LOCKT] = nfsd4_decode_lockt,
+ [OP_LOCKU] = nfsd4_decode_locku,
+ [OP_LOOKUP] = nfsd4_decode_lookup,
+ [OP_LOOKUPP] = nfsd4_decode_noop,
+ [OP_NVERIFY] = nfsd4_decode_verify,
+ [OP_OPEN] = nfsd4_decode_open,
+ [OP_OPENATTR] = nfsd4_decode_notsupp,
+ [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm,
+ [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade,
+ [OP_PUTFH] = nfsd4_decode_putfh,
+ [OP_PUTPUBFH] = nfsd4_decode_putpubfh,
+ [OP_PUTROOTFH] = nfsd4_decode_noop,
+ [OP_READ] = nfsd4_decode_read,
+ [OP_READDIR] = nfsd4_decode_readdir,
+ [OP_READLINK] = nfsd4_decode_noop,
+ [OP_REMOVE] = nfsd4_decode_remove,
+ [OP_RENAME] = nfsd4_decode_rename,
+ [OP_RENEW] = nfsd4_decode_renew,
+ [OP_RESTOREFH] = nfsd4_decode_noop,
+ [OP_SAVEFH] = nfsd4_decode_noop,
+ [OP_SECINFO] = nfsd4_decode_secinfo,
+ [OP_SETATTR] = nfsd4_decode_setattr,
+ [OP_SETCLIENTID] = nfsd4_decode_setclientid,
+ [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm,
+ [OP_VERIFY] = nfsd4_decode_verify,
+ [OP_WRITE] = nfsd4_decode_write,
+ [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner,
/* new operations for NFSv4.1 */
- [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
- [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
- [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
- [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
- [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
- [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
- [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl,
+ [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session,
+ [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id,
+ [OP_CREATE_SESSION] = nfsd4_decode_create_session,
+ [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session,
+ [OP_FREE_STATEID] = nfsd4_decode_free_stateid,
+ [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp,
#ifdef CONFIG_NFSD_PNFS
- [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
- [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
- [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
- [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
+ [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo,
+ [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
+ [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit,
+ [OP_LAYOUTGET] = nfsd4_decode_layoutget,
+ [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn,
#else
- [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_GETDEVICEINFO] = nfsd4_decode_notsupp,
+ [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
+ [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp,
+ [OP_LAYOUTGET] = nfsd4_decode_notsupp,
+ [OP_LAYOUTRETURN] = nfsd4_decode_notsupp,
#endif
- [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
- [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
- [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
- [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
- [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
+ [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name,
+ [OP_SEQUENCE] = nfsd4_decode_sequence,
+ [OP_SET_SSV] = nfsd4_decode_notsupp,
+ [OP_TEST_STATEID] = nfsd4_decode_test_stateid,
+ [OP_WANT_DELEGATION] = nfsd4_decode_notsupp,
+ [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid,
+ [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete,
/* new operations for NFSv4.2 */
- [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
- [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
- [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
- [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
- [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
- [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
- [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
- [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
- [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
- [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
+ [OP_ALLOCATE] = nfsd4_decode_fallocate,
+ [OP_COPY] = nfsd4_decode_copy,
+ [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify,
+ [OP_DEALLOCATE] = nfsd4_decode_fallocate,
+ [OP_IO_ADVISE] = nfsd4_decode_notsupp,
+ [OP_LAYOUTERROR] = nfsd4_decode_notsupp,
+ [OP_LAYOUTSTATS] = nfsd4_decode_notsupp,
+ [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status,
+ [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status,
+ [OP_READ_PLUS] = nfsd4_decode_read,
+ [OP_SEEK] = nfsd4_decode_seek,
+ [OP_WRITE_SAME] = nfsd4_decode_notsupp,
+ [OP_CLONE] = nfsd4_decode_clone,
/* RFC 8276 extended atributes operations */
- [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
- [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
- [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
- [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
+ [OP_GETXATTR] = nfsd4_decode_getxattr,
+ [OP_SETXATTR] = nfsd4_decode_setxattr,
+ [OP_LISTXATTRS] = nfsd4_decode_listxattrs,
+ [OP_REMOVEXATTR] = nfsd4_decode_removexattr,
};
static inline bool
@@ -2198,43 +2427,46 @@ nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
return true;
}
-static __be32
+static bool
nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
{
- DECODE_HEAD;
struct nfsd4_op *op;
bool cachethis = false;
int auth_slack= argp->rqstp->rq_auth_slack;
int max_reply = auth_slack + 8; /* opcnt, status */
int readcount = 0;
int readbytes = 0;
+ __be32 *p;
int i;
- READ_BUF(4);
- argp->taglen = be32_to_cpup(p++);
- READ_BUF(argp->taglen);
- SAVEMEM(argp->tag, argp->taglen);
- READ_BUF(8);
- argp->minorversion = be32_to_cpup(p++);
- argp->opcnt = be32_to_cpup(p++);
- max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
-
- if (argp->taglen > NFSD4_MAX_TAGLEN)
- goto xdr_error;
- /*
- * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
- * here, so we return success at the xdr level so that
- * nfsd4_proc can handle this is an NFS-level error.
- */
- if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
- return 0;
+ if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
+ return false;
+ max_reply += XDR_UNIT;
+ argp->tag = NULL;
+ if (unlikely(argp->taglen)) {
+ if (argp->taglen > NFSD4_MAX_TAGLEN)
+ return false;
+ p = xdr_inline_decode(argp->xdr, argp->taglen);
+ if (!p)
+ return false;
+ argp->tag = svcxdr_savemem(argp, p, argp->taglen);
+ if (!argp->tag)
+ return false;
+ max_reply += xdr_align_size(argp->taglen);
+ }
+
+ if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
+ return false;
+ if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0)
+ return false;
+ argp->opcnt = min_t(u32, argp->client_opcnt,
+ NFSD_MAX_OPS_PER_COMPOUND);
if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
- argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
+ argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops));
if (!argp->ops) {
argp->ops = argp->iops;
- dprintk("nfsd: couldn't allocate room for COMPOUND\n");
- goto xdr_error;
+ return false;
}
}
@@ -2244,17 +2476,23 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
for (i = 0; i < argp->opcnt; i++) {
op = &argp->ops[i];
op->replay = NULL;
+ op->opdesc = NULL;
- READ_BUF(4);
- op->opnum = be32_to_cpup(p++);
-
- if (nfsd4_opnum_in_range(argp, op))
+ if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
+ return false;
+ if (nfsd4_opnum_in_range(argp, op)) {
+ op->opdesc = OPDESC(op);
op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
- else {
+ if (op->status != nfs_ok)
+ trace_nfsd_compound_decode_err(argp->rqstp,
+ argp->opcnt, i,
+ op->opnum,
+ op->status);
+ } else {
op->opnum = OP_ILLEGAL;
op->status = nfserr_op_illegal;
}
- op->opdesc = OPDESC(op);
+
/*
* We'll try to cache the result in the DRC if any one
* op in the compound wants to be cached:
@@ -2289,7 +2527,7 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
- DECODE_TAIL;
+ return true;
}
static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
@@ -2298,15 +2536,25 @@ static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
if (exp->ex_flags & NFSEXP_V4ROOT) {
*p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
*p++ = 0;
- } else if (IS_I_VERSION(inode)) {
+ } else
p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
- } else {
- *p++ = cpu_to_be32(stat->ctime.tv_sec);
- *p++ = cpu_to_be32(stat->ctime.tv_nsec);
- }
return p;
}
+static __be32 nfsd4_encode_nfstime4(struct xdr_stream *xdr,
+ struct timespec64 *tv)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, XDR_UNIT * 3);
+ if (!p)
+ return nfserr_resource;
+
+ p = xdr_encode_hyper(p, (s64)tv->tv_sec);
+ *p = cpu_to_be32(tv->tv_nsec);
+ return nfs_ok;
+}
+
/*
* ctime (in NFSv4, time_metadata) is not writeable, and the client
* doesn't really care what resolution could theoretically be stored by
@@ -2335,15 +2583,8 @@ static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
{
*p++ = cpu_to_be32(c->atomic);
- if (c->change_supported) {
- p = xdr_encode_hyper(p, c->before_change);
- p = xdr_encode_hyper(p, c->after_change);
- } else {
- *p++ = cpu_to_be32(c->before_ctime_sec);
- *p++ = cpu_to_be32(c->before_ctime_nsec);
- *p++ = cpu_to_be32(c->after_ctime_sec);
- *p++ = cpu_to_be32(c->after_ctime_nsec);
- }
+ p = xdr_encode_hyper(p, c->before_change);
+ p = xdr_encode_hyper(p, c->after_change);
return p;
}
@@ -2558,7 +2799,7 @@ static u32 nfs4_file_type(umode_t mode)
case S_IFREG: return NF4REG;
case S_IFSOCK: return NF4SOCK;
default: return NF4BAD;
- };
+ }
}
static inline __be32
@@ -2642,9 +2883,10 @@ static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32
}
-static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
+static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
{
struct path path = exp->ex_path;
+ struct kstat stat;
int err;
path_get(&path);
@@ -2652,8 +2894,10 @@ static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
if (path.dentry != path.mnt->mnt_root)
break;
}
- err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
+ err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
path_put(&path);
+ if (!err)
+ *pino = stat.ino;
return err;
}
@@ -2706,10 +2950,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
struct kstat stat;
struct svc_fh *tempfh = NULL;
struct kstatfs statfs;
- __be32 *p;
+ __be32 *p, *attrlen_p;
int starting_len = xdr->buf->len;
int attrlen_offset;
- __be32 attrlen;
u32 dummy;
u64 dummy64;
u32 rdattr_err = 0;
@@ -2741,6 +2984,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
if (err)
goto out_nfserr;
+ if (!(stat.result_mask & STATX_BTIME))
+ /* underlying FS does not offer btime so we can't share it */
+ bmval1 &= ~FATTR4_WORD1_TIME_CREATE;
if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
@@ -2794,10 +3040,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
goto out;
attrlen_offset = xdr->buf->len;
- p = xdr_reserve_space(xdr, 4);
- if (!p)
+ attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
+ if (!attrlen_p)
goto out_resource;
- p++; /* to be backfilled later */
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
u32 supp[3];
@@ -2983,7 +3228,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
if (!p)
goto out_resource;
- p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
+ p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
fhp->fh_handle.fh_size);
}
if (bmval0 & FATTR4_WORD0_FILEID) {
@@ -3115,11 +3360,14 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
p = xdr_encode_hyper(p, dummy64);
}
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
- p = xdr_reserve_space(xdr, 12);
- if (!p)
- goto out_resource;
- p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
- *p++ = cpu_to_be32(stat.atime.tv_nsec);
+ status = nfsd4_encode_nfstime4(xdr, &stat.atime);
+ if (status)
+ goto out;
+ }
+ if (bmval1 & FATTR4_WORD1_TIME_CREATE) {
+ status = nfsd4_encode_nfstime4(xdr, &stat.btime);
+ if (status)
+ goto out;
}
if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
p = xdr_reserve_space(xdr, 12);
@@ -3128,36 +3376,31 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
p = encode_time_delta(p, d_inode(dentry));
}
if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
- p = xdr_reserve_space(xdr, 12);
- if (!p)
- goto out_resource;
- p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
- *p++ = cpu_to_be32(stat.ctime.tv_nsec);
+ status = nfsd4_encode_nfstime4(xdr, &stat.ctime);
+ if (status)
+ goto out;
}
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
- p = xdr_reserve_space(xdr, 12);
- if (!p)
- goto out_resource;
- p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
- *p++ = cpu_to_be32(stat.mtime.tv_nsec);
+ status = nfsd4_encode_nfstime4(xdr, &stat.mtime);
+ if (status)
+ goto out;
}
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
- struct kstat parent_stat;
u64 ino = stat.ino;
p = xdr_reserve_space(xdr, 8);
if (!p)
goto out_resource;
/*
- * Get parent's attributes if not ignoring crossmount
- * and this is the root of a cross-mounted filesystem.
+ * Get ino of mountpoint in parent filesystem, if not ignoring
+ * crossmount and this is the root of a cross-mounted
+ * filesystem.
*/
if (ignore_crossmnt == 0 &&
dentry == exp->ex_path.mnt->mnt_root) {
- err = get_parent_attributes(exp, &parent_stat);
+ err = nfsd4_get_mounted_on_ino(exp, &ino);
if (err)
goto out_nfserr;
- ino = parent_stat.ino;
}
p = xdr_encode_hyper(p, ino);
}
@@ -3194,16 +3437,6 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
goto out;
}
- if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
- p = xdr_reserve_space(xdr, 4);
- if (!p)
- goto out_resource;
- if (IS_I_VERSION(d_inode(dentry)))
- *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
- else
- *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
- }
-
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
status = nfsd4_encode_security_label(xdr, rqstp, context,
@@ -3222,8 +3455,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
*p++ = cpu_to_be32(err == 0);
}
- attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
- write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
+ *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
status = nfs_ok;
out:
@@ -3392,7 +3624,7 @@ nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
p = xdr_reserve_space(xdr, 3*4 + namlen);
if (!p)
goto fail;
- p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
+ p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */
p = xdr_encode_array(p, name, namlen); /* name length & name */
nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
@@ -3476,9 +3708,11 @@ nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
}
static __be32
-nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
+nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_access *access = &u->access;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 8);
@@ -3489,9 +3723,11 @@ nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_
return 0;
}
-static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
+static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
@@ -3506,18 +3742,22 @@ static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp,
}
static __be32
-nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
+nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_close *close = &u->close;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_encode_stateid(xdr, &close->cl_stateid);
}
static __be32
-nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
+nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_commit *commit = &u->commit;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
@@ -3529,9 +3769,11 @@ nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_
}
static __be32
-nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
+nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_create *create = &u->create;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 20);
@@ -3543,19 +3785,23 @@ nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_
}
static __be32
-nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
+nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
+ struct nfsd4_getattr *getattr = &u->getattr;
struct svc_fh *fhp = getattr->ga_fhp;
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
getattr->ga_bmval, resp->rqstp, 0);
}
static __be32
-nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
+nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct svc_fh **fhpp = &u->getfh;
+ struct xdr_stream *xdr = resp->xdr;
struct svc_fh *fhp = *fhpp;
unsigned int len;
__be32 *p;
@@ -3564,7 +3810,7 @@ nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh
p = xdr_reserve_space(xdr, len + 4);
if (!p)
return nfserr_resource;
- p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
+ p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
return 0;
}
@@ -3608,9 +3854,11 @@ nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
}
static __be32
-nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
+nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_lock *lock = &u->lock;
+ struct xdr_stream *xdr = resp->xdr;
if (!nfserr)
nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
@@ -3621,9 +3869,11 @@ nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lo
}
static __be32
-nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
+nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_lockt *lockt = &u->lockt;
+ struct xdr_stream *xdr = resp->xdr;
if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
@@ -3631,18 +3881,22 @@ nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_l
}
static __be32
-nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
+nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_locku *locku = &u->locku;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
}
static __be32
-nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
+nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_link *link = &u->link;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 20);
@@ -3654,9 +3908,11 @@ nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_li
static __be32
-nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
+nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_open *open = &u->open;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
@@ -3748,17 +4004,21 @@ nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_op
}
static __be32
-nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
+nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_open_confirm *oc = &u->open_confirm;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
}
static __be32
-nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
+nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_open_downgrade *od = &u->open_downgrade;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_encode_stateid(xdr, &od->od_stateid);
}
@@ -3768,33 +4028,28 @@ static __be32 nfsd4_encode_splice_read(
struct nfsd4_read *read,
struct file *file, unsigned long maxcount)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
struct xdr_buf *buf = xdr->buf;
- u32 eof;
- int space_left;
+ int status, space_left;
__be32 nfserr;
- __be32 *p = xdr->p - 2;
/* Make sure there will be room for padding if needed */
if (xdr->end - xdr->p < 1)
return nfserr_resource;
nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
- file, read->rd_offset, &maxcount, &eof);
+ file, read->rd_offset, &maxcount,
+ &read->rd_eof);
read->rd_length = maxcount;
- if (nfserr) {
- /*
- * nfsd_splice_actor may have already messed with the
- * page length; reset it so as not to confuse
- * xdr_truncate_encode:
- */
- buf->page_len = 0;
- return nfserr;
+ if (nfserr)
+ goto out_err;
+ status = svc_encode_result_payload(read->rd_rqstp,
+ buf->head[0].iov_len, maxcount);
+ if (status) {
+ nfserr = nfserrno(status);
+ goto out_err;
}
- *(p++) = htonl(eof);
- *(p++) = htonl(maxcount);
-
buf->page_len = maxcount;
buf->len += maxcount;
xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
@@ -3820,18 +4075,25 @@ static __be32 nfsd4_encode_splice_read(
xdr->end = (__be32 *)((void *)xdr->end + space_left);
return 0;
+
+out_err:
+ /*
+ * nfsd_splice_actor may have already messed with the
+ * page length; reset it so as not to confuse
+ * xdr_truncate_encode in our caller.
+ */
+ buf->page_len = 0;
+ return nfserr;
}
static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
struct nfsd4_read *read,
struct file *file, unsigned long maxcount)
{
- struct xdr_stream *xdr = &resp->xdr;
- u32 eof;
- int starting_len = xdr->buf->len - 8;
+ struct xdr_stream *xdr = resp->xdr;
+ unsigned int starting_len = xdr->buf->len;
+ __be32 zero = xdr_zero;
__be32 nfserr;
- __be32 tmp;
- int pad;
read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
if (read->rd_vlen < 0)
@@ -3839,33 +4101,27 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
- &eof);
+ &read->rd_eof);
read->rd_length = maxcount;
if (nfserr)
return nfserr;
- if (svc_encode_read_payload(resp->rqstp, starting_len + 8, maxcount))
+ if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
return nfserr_io;
- xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
-
- tmp = htonl(eof);
- write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
- tmp = htonl(maxcount);
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
-
- tmp = xdr_zero;
- pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
- &tmp, pad);
- return 0;
+ xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
+ write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
+ xdr_pad_size(maxcount));
+ return nfs_ok;
}
static __be32
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_read *read)
+ union nfsd4_op_u *u)
{
+ struct nfsd4_read *read = &u->read;
+ bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
unsigned long maxcount;
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
struct file *file;
int starting_len = xdr->buf->len;
__be32 *p;
@@ -3876,45 +4132,44 @@ nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
if (!p) {
- WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
+ WARN_ON_ONCE(splice_ok);
return nfserr_resource;
}
- if (resp->xdr.buf->page_len &&
- test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
+ if (resp->xdr->buf->page_len && splice_ok) {
WARN_ON_ONCE(1);
return nfserr_serverfault;
}
xdr_commit_encode(xdr);
- maxcount = svc_max_payload(resp->rqstp);
- maxcount = min_t(unsigned long, maxcount,
+ maxcount = min_t(unsigned long, read->rd_length,
(xdr->buf->buflen - xdr->buf->len));
- maxcount = min_t(unsigned long, maxcount, read->rd_length);
- if (file->f_op->splice_read &&
- test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
+ if (file->f_op->splice_read && splice_ok)
nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
else
nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
-
- if (nfserr)
+ if (nfserr) {
xdr_truncate_encode(xdr, starting_len);
+ return nfserr;
+ }
- return nfserr;
+ p = xdr_encode_bool(p, read->rd_eof);
+ *p = cpu_to_be32(read->rd_length);
+ return nfs_ok;
}
static __be32
-nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
+nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- int maxcount;
- __be32 wire_count;
- int zero = 0;
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_readlink *readlink = &u->readlink;
+ __be32 *p, *maxcount_p, zero = xdr_zero;
+ struct xdr_stream *xdr = resp->xdr;
int length_offset = xdr->buf->len;
- __be32 *p;
+ int maxcount, status;
- p = xdr_reserve_space(xdr, 4);
- if (!p)
+ maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
+ if (!maxcount_p)
return nfserr_resource;
maxcount = PAGE_SIZE;
@@ -3931,28 +4186,35 @@ nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd
(char *)p, &maxcount);
if (nfserr == nfserr_isdir)
nfserr = nfserr_inval;
- if (nfserr) {
- xdr_truncate_encode(xdr, length_offset);
- return nfserr;
- }
+ if (nfserr)
+ goto out_err;
+ status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
+ maxcount);
+ if (status) {
+ nfserr = nfserrno(status);
+ goto out_err;
+ }
+ *maxcount_p = cpu_to_be32(maxcount);
+ xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
+ write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
+ xdr_pad_size(maxcount));
+ return nfs_ok;
- wire_count = htonl(maxcount);
- write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
- xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
- if (maxcount & 3)
- write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
- &zero, 4 - (maxcount&3));
- return 0;
+out_err:
+ xdr_truncate_encode(xdr, length_offset);
+ return nfserr;
}
static __be32
-nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
+nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
+ struct nfsd4_readdir *readdir = &u->readdir;
int maxcount;
int bytes_left;
loff_t offset;
__be64 wire_offset;
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
int starting_len = xdr->buf->len;
__be32 *p;
@@ -3963,8 +4225,8 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
*p++ = cpu_to_be32(0);
*p++ = cpu_to_be32(0);
- resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
- - (char *)resp->xdr.buf->head[0].iov_base;
+ xdr->buf->head[0].iov_len = (char *)xdr->p -
+ (char *)xdr->buf->head[0].iov_base;
/*
* Number of bytes left for directory entries allowing for the
@@ -4037,9 +4299,11 @@ nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
}
static __be32
-nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
+nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_remove *remove = &u->remove;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 20);
@@ -4050,9 +4314,11 @@ nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_
}
static __be32
-nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
+nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_rename *rename = &u->rename;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 40);
@@ -4133,18 +4399,20 @@ nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_secinfo *secinfo)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_secinfo *secinfo = &u->secinfo;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
}
static __be32
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_secinfo_no_name *secinfo)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name;
+ struct xdr_stream *xdr = resp->xdr;
return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
}
@@ -4154,9 +4422,11 @@ nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
* regardless of the error status.
*/
static __be32
-nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
+nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_setattr *setattr = &u->setattr;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 16);
@@ -4178,9 +4448,11 @@ nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4
}
static __be32
-nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
+nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_setclientid *scd = &u->setclientid;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
if (!nfserr) {
@@ -4202,9 +4474,11 @@ nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct n
}
static __be32
-nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
+nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_write *write = &u->write;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 16);
@@ -4219,9 +4493,10 @@ nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_w
static __be32
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_exchange_id *exid)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_exchange_id *exid = &u->exchange_id;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
char *major_id;
char *server_scope;
@@ -4297,9 +4572,10 @@ nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_create_session *sess)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_create_session *sess = &u->create_session;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 24);
@@ -4350,9 +4626,10 @@ nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_sequence *seq)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_sequence *seq = &u->sequence;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
@@ -4373,9 +4650,10 @@ nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_test_stateid *test_stateid)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
+ struct xdr_stream *xdr = resp->xdr;
struct nfsd4_test_stateid_id *stateid, *next;
__be32 *p;
@@ -4394,9 +4672,10 @@ nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
#ifdef CONFIG_NFSD_PNFS
static __be32
nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_getdeviceinfo *gdev)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
+ struct xdr_stream *xdr = resp->xdr;
const struct nfsd4_layout_ops *ops;
u32 starting_len = xdr->buf->len, needed_len;
__be32 *p;
@@ -4447,9 +4726,10 @@ nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_layoutget *lgp)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_layoutget *lgp = &u->layoutget;
+ struct xdr_stream *xdr = resp->xdr;
const struct nfsd4_layout_ops *ops;
__be32 *p;
@@ -4474,9 +4754,10 @@ nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_layoutcommit *lcp)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 4);
@@ -4495,9 +4776,10 @@ nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_layoutreturn *lrp)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 4);
@@ -4515,7 +4797,7 @@ nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
struct nfsd42_write_res *write, bool sync)
{
__be32 *p;
- p = xdr_reserve_space(&resp->xdr, 4);
+ p = xdr_reserve_space(resp->xdr, 4);
if (!p)
return nfserr_resource;
@@ -4524,11 +4806,11 @@ nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
else {
__be32 nfserr;
*p++ = cpu_to_be32(1);
- nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
+ nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
if (nfserr)
return nfserr;
}
- p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
+ p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
if (!p)
return nfserr_resource;
@@ -4542,7 +4824,7 @@ nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
static __be32
nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
struct nfs42_netaddr *addr;
__be32 *p;
@@ -4581,26 +4863,28 @@ nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
static __be32
nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_copy *copy)
+ union nfsd4_op_u *u)
{
+ struct nfsd4_copy *copy = &u->copy;
__be32 *p;
nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
- copy->cp_synchronous);
+ nfsd4_copy_is_sync(copy));
if (nfserr)
return nfserr;
- p = xdr_reserve_space(&resp->xdr, 4 + 4);
+ p = xdr_reserve_space(resp->xdr, 4 + 4);
*p++ = xdr_one; /* cr_consecutive */
- *p++ = cpu_to_be32(copy->cp_synchronous);
+ *p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero;
return 0;
}
static __be32
nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_offload_status *os)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_offload_status *os = &u->offload_status;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 8 + 4);
@@ -4613,159 +4897,84 @@ nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
- struct nfsd4_read *read,
- unsigned long *maxcount, u32 *eof,
- loff_t *pos)
+ struct nfsd4_read *read)
{
- struct xdr_stream *xdr = &resp->xdr;
+ bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
struct file *file = read->rd_nf->nf_file;
- int starting_len = xdr->buf->len;
- loff_t hole_pos;
- __be32 nfserr;
- __be32 *p, tmp;
- __be64 tmp64;
-
- hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
- if (hole_pos > read->rd_offset)
- *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
- *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
+ struct xdr_stream *xdr = resp->xdr;
+ unsigned long maxcount;
+ __be32 nfserr, *p;
/* Content type, offset, byte count */
p = xdr_reserve_space(xdr, 4 + 8 + 4);
if (!p)
- return nfserr_resource;
+ return nfserr_io;
+ if (resp->xdr->buf->page_len && splice_ok) {
+ WARN_ON_ONCE(splice_ok);
+ return nfserr_serverfault;
+ }
- read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
- if (read->rd_vlen < 0)
- return nfserr_resource;
+ maxcount = min_t(unsigned long, read->rd_length,
+ (xdr->buf->buflen - xdr->buf->len));
- nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
- resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
+ if (file->f_op->splice_read && splice_ok)
+ nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
+ else
+ nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
if (nfserr)
return nfserr;
- xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
-
- tmp = htonl(NFS4_CONTENT_DATA);
- write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
- tmp64 = cpu_to_be64(read->rd_offset);
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
- tmp = htonl(*maxcount);
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
-
- tmp = xdr_zero;
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
- xdr_pad_size(*maxcount));
- return nfs_ok;
-}
-
-static __be32
-nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
- struct nfsd4_read *read,
- unsigned long *maxcount, u32 *eof)
-{
- struct file *file = read->rd_nf->nf_file;
- loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
- loff_t f_size = i_size_read(file_inode(file));
- unsigned long count;
- __be32 *p;
-
- if (data_pos == -ENXIO)
- data_pos = f_size;
- else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
- return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
- count = data_pos - read->rd_offset;
-
- /* Content type, offset, byte count */
- p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8);
- if (!p)
- return nfserr_resource;
- *p++ = htonl(NFS4_CONTENT_HOLE);
- p = xdr_encode_hyper(p, read->rd_offset);
- p = xdr_encode_hyper(p, count);
+ *p++ = cpu_to_be32(NFS4_CONTENT_DATA);
+ p = xdr_encode_hyper(p, read->rd_offset);
+ *p = cpu_to_be32(read->rd_length);
- *eof = (read->rd_offset + count) >= f_size;
- *maxcount = min_t(unsigned long, count, *maxcount);
return nfs_ok;
}
static __be32
nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_read *read)
+ union nfsd4_op_u *u)
{
- unsigned long maxcount, count;
- struct xdr_stream *xdr = &resp->xdr;
- struct file *file;
+ struct nfsd4_read *read = &u->read;
+ struct file *file = read->rd_nf->nf_file;
+ struct xdr_stream *xdr = resp->xdr;
int starting_len = xdr->buf->len;
- int last_segment = xdr->buf->len;
- int segments = 0;
- __be32 *p, tmp;
- bool is_data;
- loff_t pos;
- u32 eof;
+ u32 segments = 0;
+ __be32 *p;
if (nfserr)
return nfserr;
- file = read->rd_nf->nf_file;
/* eof flag, segment count */
p = xdr_reserve_space(xdr, 4 + 4);
if (!p)
- return nfserr_resource;
+ return nfserr_io;
xdr_commit_encode(xdr);
- maxcount = svc_max_payload(resp->rqstp);
- maxcount = min_t(unsigned long, maxcount,
- (xdr->buf->buflen - xdr->buf->len));
- maxcount = min_t(unsigned long, maxcount, read->rd_length);
- count = maxcount;
-
- eof = read->rd_offset >= i_size_read(file_inode(file));
- if (eof)
+ read->rd_eof = read->rd_offset >= i_size_read(file_inode(file));
+ if (read->rd_eof)
goto out;
- pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
- is_data = pos > read->rd_offset;
-
- while (count > 0 && !eof) {
- maxcount = count;
- if (is_data)
- nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
- segments == 0 ? &pos : NULL);
- else
- nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
- if (nfserr)
- goto out;
- count -= maxcount;
- read->rd_offset += maxcount;
- is_data = !is_data;
- last_segment = xdr->buf->len;
- segments++;
- }
-
-out:
- if (nfserr && segments == 0)
+ nfserr = nfsd4_encode_read_plus_data(resp, read);
+ if (nfserr) {
xdr_truncate_encode(xdr, starting_len);
- else {
- if (nfserr) {
- xdr_truncate_encode(xdr, last_segment);
- nfserr = nfs_ok;
- eof = 0;
- }
- tmp = htonl(eof);
- write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
- tmp = htonl(segments);
- write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
+ return nfserr;
}
+ segments++;
+
+out:
+ p = xdr_encode_bool(p, read->rd_eof);
+ *p = cpu_to_be32(segments);
return nfserr;
}
static __be32
nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_copy_notify *cn)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_copy_notify *cn = &u->copy_notify;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
if (nfserr)
@@ -4792,16 +5001,18 @@ nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
*p++ = cpu_to_be32(1);
- return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
+ nfserr = nfsd42_encode_nl4_server(resp, cn->cpn_src);
+ return nfserr;
}
static __be32
nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_seek *seek)
+ union nfsd4_op_u *u)
{
+ struct nfsd4_seek *seek = &u->seek;
__be32 *p;
- p = xdr_reserve_space(&resp->xdr, 4 + 8);
+ p = xdr_reserve_space(resp->xdr, 4 + 8);
*p++ = cpu_to_be32(seek->seek_eof);
p = xdr_encode_hyper(p, seek->seek_pos);
@@ -4809,7 +5020,8 @@ nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
}
static __be32
-nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
+nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr,
+ union nfsd4_op_u *p)
{
return nfserr;
}
@@ -4860,9 +5072,10 @@ nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
static __be32
nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_getxattr *getxattr)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_getxattr *getxattr = &u->getxattr;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p, err;
p = xdr_reserve_space(xdr, 4);
@@ -4884,9 +5097,10 @@ nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_setxattr *setxattr)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_setxattr *setxattr = &u->setxattr;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 20);
@@ -4925,9 +5139,10 @@ nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
static __be32
nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_listxattrs *listxattrs)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
+ struct xdr_stream *xdr = resp->xdr;
u32 cookie_offset, count_offset, eof;
u32 left, xdrleft, slen, count;
u32 xdrlen, offset;
@@ -5036,9 +5251,10 @@ nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
static __be32
nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
- struct nfsd4_removexattr *removexattr)
+ union nfsd4_op_u *u)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct nfsd4_removexattr *removexattr = &u->removexattr;
+ struct xdr_stream *xdr = resp->xdr;
__be32 *p;
p = xdr_reserve_space(xdr, 20);
@@ -5049,7 +5265,7 @@ nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
return 0;
}
-typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
+typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u);
/*
* Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
@@ -5057,93 +5273,93 @@ typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
* done in the decoding phase.
*/
static const nfsd4_enc nfsd4_enc_ops[] = {
- [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
- [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
- [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
- [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
- [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
- [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
- [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
- [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
- [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
- [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
- [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
- [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
- [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
- [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
- [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
- [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
- [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
- [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
- [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
- [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
- [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
- [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
- [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_ACCESS] = nfsd4_encode_access,
+ [OP_CLOSE] = nfsd4_encode_close,
+ [OP_COMMIT] = nfsd4_encode_commit,
+ [OP_CREATE] = nfsd4_encode_create,
+ [OP_DELEGPURGE] = nfsd4_encode_noop,
+ [OP_DELEGRETURN] = nfsd4_encode_noop,
+ [OP_GETATTR] = nfsd4_encode_getattr,
+ [OP_GETFH] = nfsd4_encode_getfh,
+ [OP_LINK] = nfsd4_encode_link,
+ [OP_LOCK] = nfsd4_encode_lock,
+ [OP_LOCKT] = nfsd4_encode_lockt,
+ [OP_LOCKU] = nfsd4_encode_locku,
+ [OP_LOOKUP] = nfsd4_encode_noop,
+ [OP_LOOKUPP] = nfsd4_encode_noop,
+ [OP_NVERIFY] = nfsd4_encode_noop,
+ [OP_OPEN] = nfsd4_encode_open,
+ [OP_OPENATTR] = nfsd4_encode_noop,
+ [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm,
+ [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade,
+ [OP_PUTFH] = nfsd4_encode_noop,
+ [OP_PUTPUBFH] = nfsd4_encode_noop,
+ [OP_PUTROOTFH] = nfsd4_encode_noop,
+ [OP_READ] = nfsd4_encode_read,
+ [OP_READDIR] = nfsd4_encode_readdir,
+ [OP_READLINK] = nfsd4_encode_readlink,
+ [OP_REMOVE] = nfsd4_encode_remove,
+ [OP_RENAME] = nfsd4_encode_rename,
+ [OP_RENEW] = nfsd4_encode_noop,
+ [OP_RESTOREFH] = nfsd4_encode_noop,
+ [OP_SAVEFH] = nfsd4_encode_noop,
+ [OP_SECINFO] = nfsd4_encode_secinfo,
+ [OP_SETATTR] = nfsd4_encode_setattr,
+ [OP_SETCLIENTID] = nfsd4_encode_setclientid,
+ [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop,
+ [OP_VERIFY] = nfsd4_encode_noop,
+ [OP_WRITE] = nfsd4_encode_write,
+ [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop,
/* NFSv4.1 operations */
- [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
- [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
- [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
- [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop,
+ [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session,
+ [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id,
+ [OP_CREATE_SESSION] = nfsd4_encode_create_session,
+ [OP_DESTROY_SESSION] = nfsd4_encode_noop,
+ [OP_FREE_STATEID] = nfsd4_encode_noop,
+ [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop,
#ifdef CONFIG_NFSD_PNFS
- [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
- [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
- [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
- [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
+ [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo,
+ [OP_GETDEVICELIST] = nfsd4_encode_noop,
+ [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit,
+ [OP_LAYOUTGET] = nfsd4_encode_layoutget,
+ [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn,
#else
- [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_GETDEVICEINFO] = nfsd4_encode_noop,
+ [OP_GETDEVICELIST] = nfsd4_encode_noop,
+ [OP_LAYOUTCOMMIT] = nfsd4_encode_noop,
+ [OP_LAYOUTGET] = nfsd4_encode_noop,
+ [OP_LAYOUTRETURN] = nfsd4_encode_noop,
#endif
- [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
- [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
- [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
- [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name,
+ [OP_SEQUENCE] = nfsd4_encode_sequence,
+ [OP_SET_SSV] = nfsd4_encode_noop,
+ [OP_TEST_STATEID] = nfsd4_encode_test_stateid,
+ [OP_WANT_DELEGATION] = nfsd4_encode_noop,
+ [OP_DESTROY_CLIENTID] = nfsd4_encode_noop,
+ [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop,
/* NFSv4.2 operations */
- [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
- [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
- [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
- [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
- [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
- [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
- [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
+ [OP_ALLOCATE] = nfsd4_encode_noop,
+ [OP_COPY] = nfsd4_encode_copy,
+ [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify,
+ [OP_DEALLOCATE] = nfsd4_encode_noop,
+ [OP_IO_ADVISE] = nfsd4_encode_noop,
+ [OP_LAYOUTERROR] = nfsd4_encode_noop,
+ [OP_LAYOUTSTATS] = nfsd4_encode_noop,
+ [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop,
+ [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status,
+ [OP_READ_PLUS] = nfsd4_encode_read_plus,
+ [OP_SEEK] = nfsd4_encode_seek,
+ [OP_WRITE_SAME] = nfsd4_encode_noop,
+ [OP_CLONE] = nfsd4_encode_noop,
/* RFC 8276 extended atributes operations */
- [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
- [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
- [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
- [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
+ [OP_GETXATTR] = nfsd4_encode_getxattr,
+ [OP_SETXATTR] = nfsd4_encode_setxattr,
+ [OP_LISTXATTRS] = nfsd4_encode_listxattrs,
+ [OP_REMOVEXATTR] = nfsd4_encode_removexattr,
};
/*
@@ -5178,7 +5394,7 @@ __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
- struct xdr_stream *xdr = &resp->xdr;
+ struct xdr_stream *xdr = resp->xdr;
struct nfs4_stateowner *so = resp->cstate.replay_owner;
struct svc_rqst *rqstp = resp->rqstp;
const struct nfsd4_operation *opdesc = op->opdesc;
@@ -5187,10 +5403,8 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
__be32 *p;
p = xdr_reserve_space(xdr, 8);
- if (!p) {
- WARN_ON_ONCE(1);
- return;
- }
+ if (!p)
+ goto release;
*p++ = cpu_to_be32(op->opnum);
post_err_offset = xdr->buf->len;
@@ -5199,12 +5413,12 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
if (op->status && opdesc &&
!(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
goto status;
- BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
+ BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
!nfsd4_enc_ops[op->opnum]);
encoder = nfsd4_enc_ops[op->opnum];
op->status = encoder(resp, op->status, &op->u);
- if (opdesc && opdesc->op_release)
- opdesc->op_release(&op->u);
+ if (op->status)
+ trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
xdr_commit_encode(xdr);
/* nfsd4_check_resp_size guarantees enough room for error status */
@@ -5244,8 +5458,10 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
so->so_replay.rp_buf, len);
}
status:
- /* Note that op->status is already in network byte order: */
- write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
+ *p = op->status;
+release:
+ if (opdesc && opdesc->op_release)
+ opdesc->op_release(&op->u);
}
/*
@@ -5271,22 +5487,14 @@ nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
}
-int
-nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_ressize_check(rqstp, p);
-}
-
void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
{
struct nfsd4_compoundargs *args = rqstp->rq_argp;
if (args->ops != args->iops) {
- kfree(args->ops);
+ vfree(args->ops);
args->ops = args->iops;
}
- kfree(args->tmpp);
- args->tmpp = NULL;
while (args->to_free) {
struct svcxdr_tmpbuf *tb = args->to_free;
args->to_free = tb->next;
@@ -5294,57 +5502,44 @@ void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
}
}
-int
-nfs4svc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
-{
- return 1;
-}
-
-int
-nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd4_compoundargs *args = rqstp->rq_argp;
- if (rqstp->rq_arg.head[0].iov_len % 4) {
- /* client is nuts */
- dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
- __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
- return 0;
- }
- args->p = p;
- args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
- args->pagelist = rqstp->rq_arg.pages;
- args->pagelen = rqstp->rq_arg.page_len;
- args->tail = false;
- args->tmpp = NULL;
+ /* svcxdr_tmp_alloc */
args->to_free = NULL;
+
+ args->xdr = xdr;
args->ops = args->iops;
args->rqstp = rqstp;
- return !nfsd4_decode_compound(args);
+ return nfsd4_decode_compound(args);
}
-int
-nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd4_compoundres *resp = rqstp->rq_resp;
- struct xdr_buf *buf = resp->xdr.buf;
+ __be32 *p;
- WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
- buf->tail[0].iov_len);
+ /*
+ * Send buffer space for the following items is reserved
+ * at the top of nfsd4_proc_compound().
+ */
+ p = resp->statusp;
- *p = resp->cstate.status;
+ *p++ = resp->cstate.status;
- rqstp->rq_next_page = resp->xdr.page_ptr + 1;
+ rqstp->rq_next_page = xdr->page_ptr + 1;
- p = resp->tagp;
*p++ = htonl(resp->taglen);
memcpy(p, resp->tag, resp->taglen);
p += XDR_QUADLEN(resp->taglen);
*p++ = htonl(resp->opcnt);
nfsd4_sequence_done(resp);
- return 1;
+ return true;
}
/*
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index 80c90fc231a5..2b5417e06d80 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -84,12 +84,6 @@ nfsd_hashsize(unsigned int limit)
return roundup_pow_of_two(limit / TARGET_BUCKET_SIZE);
}
-static u32
-nfsd_cache_hash(__be32 xid, struct nfsd_net *nn)
-{
- return hash_32(be32_to_cpu(xid), nn->maskbits);
-}
-
static struct svc_cacherep *
nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum,
struct nfsd_net *nn)
@@ -121,14 +115,14 @@ nfsd_reply_cache_free_locked(struct nfsd_drc_bucket *b, struct svc_cacherep *rp,
struct nfsd_net *nn)
{
if (rp->c_type == RC_REPLBUFF && rp->c_replvec.iov_base) {
- nn->drc_mem_usage -= rp->c_replvec.iov_len;
+ nfsd_stats_drc_mem_usage_sub(nn, rp->c_replvec.iov_len);
kfree(rp->c_replvec.iov_base);
}
if (rp->c_state != RC_UNUSED) {
rb_erase(&rp->c_node, &b->rb_head);
list_del(&rp->c_lru);
atomic_dec(&nn->num_drc_entries);
- nn->drc_mem_usage -= sizeof(*rp);
+ nfsd_stats_drc_mem_usage_sub(nn, sizeof(*rp));
}
kmem_cache_free(drc_slab, rp);
}
@@ -154,6 +148,16 @@ void nfsd_drc_slab_free(void)
kmem_cache_destroy(drc_slab);
}
+static int nfsd_reply_cache_stats_init(struct nfsd_net *nn)
+{
+ return nfsd_percpu_counters_init(nn->counter, NFSD_NET_COUNTERS_NUM);
+}
+
+static void nfsd_reply_cache_stats_destroy(struct nfsd_net *nn)
+{
+ nfsd_percpu_counters_destroy(nn->counter, NFSD_NET_COUNTERS_NUM);
+}
+
int nfsd_reply_cache_init(struct nfsd_net *nn)
{
unsigned int hashsize;
@@ -165,12 +169,16 @@ int nfsd_reply_cache_init(struct nfsd_net *nn)
hashsize = nfsd_hashsize(nn->max_drc_entries);
nn->maskbits = ilog2(hashsize);
+ status = nfsd_reply_cache_stats_init(nn);
+ if (status)
+ goto out_nomem;
+
nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan;
nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count;
nn->nfsd_reply_cache_shrinker.seeks = 1;
status = register_shrinker(&nn->nfsd_reply_cache_shrinker);
if (status)
- goto out_nomem;
+ goto out_stats_destroy;
nn->drc_hashtbl = kvzalloc(array_size(hashsize,
sizeof(*nn->drc_hashtbl)), GFP_KERNEL);
@@ -186,6 +194,8 @@ int nfsd_reply_cache_init(struct nfsd_net *nn)
return 0;
out_shrinker:
unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
+out_stats_destroy:
+ nfsd_reply_cache_stats_destroy(nn);
out_nomem:
printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
return -ENOMEM;
@@ -206,6 +216,7 @@ void nfsd_reply_cache_shutdown(struct nfsd_net *nn)
rp, nn);
}
}
+ nfsd_reply_cache_stats_destroy(nn);
kvfree(nn->drc_hashtbl);
nn->drc_hashtbl = NULL;
@@ -224,8 +235,16 @@ lru_put_end(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
list_move_tail(&rp->c_lru, &b->lru_head);
}
-static long
-prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn)
+static noinline struct nfsd_drc_bucket *
+nfsd_cache_bucket_find(__be32 xid, struct nfsd_net *nn)
+{
+ unsigned int hash = hash_32((__force u32)xid, nn->maskbits);
+
+ return &nn->drc_hashtbl[hash];
+}
+
+static long prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn,
+ unsigned int max)
{
struct svc_cacherep *rp, *tmp;
long freed = 0;
@@ -241,11 +260,17 @@ prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn)
time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
break;
nfsd_reply_cache_free_locked(b, rp, nn);
- freed++;
+ if (max && freed++ > max)
+ break;
}
return freed;
}
+static long nfsd_prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn)
+{
+ return prune_bucket(b, nn, 3);
+}
+
/*
* Walk the LRU list and prune off entries that are older than RC_EXPIRE.
* Also prune the oldest ones when the total exceeds the max number of entries.
@@ -262,7 +287,7 @@ prune_cache_entries(struct nfsd_net *nn)
if (list_empty(&b->lru_head))
continue;
spin_lock(&b->cache_lock);
- freed += prune_bucket(b, nn);
+ freed += prune_bucket(b, nn, 0);
spin_unlock(&b->cache_lock);
}
return freed;
@@ -324,7 +349,7 @@ nfsd_cache_key_cmp(const struct svc_cacherep *key,
{
if (key->c_key.k_xid == rp->c_key.k_xid &&
key->c_key.k_csum != rp->c_key.k_csum) {
- ++nn->payload_misses;
+ nfsd_stats_payload_misses_inc(nn);
trace_nfsd_drc_mismatch(nn, key, rp);
}
@@ -396,18 +421,16 @@ nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key,
*/
int nfsd_cache_lookup(struct svc_rqst *rqstp)
{
- struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+ struct nfsd_net *nn;
struct svc_cacherep *rp, *found;
- __be32 xid = rqstp->rq_xid;
__wsum csum;
- u32 hash = nfsd_cache_hash(xid, nn);
- struct nfsd_drc_bucket *b = &nn->drc_hashtbl[hash];
+ struct nfsd_drc_bucket *b;
int type = rqstp->rq_cachetype;
int rtn = RC_DOIT;
rqstp->rq_cacherep = NULL;
if (type == RC_NOCACHE) {
- nfsdstats.rcnocache++;
+ nfsd_stats_rc_nocache_inc();
goto out;
}
@@ -417,27 +440,25 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp)
* Since the common case is a cache miss followed by an insert,
* preallocate an entry.
*/
+ nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
rp = nfsd_reply_cache_alloc(rqstp, csum, nn);
if (!rp)
goto out;
+ b = nfsd_cache_bucket_find(rqstp->rq_xid, nn);
spin_lock(&b->cache_lock);
found = nfsd_cache_insert(b, rp, nn);
- if (found != rp) {
- nfsd_reply_cache_free_locked(NULL, rp, nn);
- rp = found;
+ if (found != rp)
goto found_entry;
- }
- nfsdstats.rcmisses++;
+ nfsd_stats_rc_misses_inc();
rqstp->rq_cacherep = rp;
rp->c_state = RC_INPROG;
atomic_inc(&nn->num_drc_entries);
- nn->drc_mem_usage += sizeof(*rp);
+ nfsd_stats_drc_mem_usage_add(nn, sizeof(*rp));
- /* go ahead and prune the cache */
- prune_bucket(b, nn);
+ nfsd_prune_bucket(b, nn);
out_unlock:
spin_unlock(&b->cache_lock);
@@ -446,8 +467,10 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp)
found_entry:
/* We found a matching entry which is either in progress or done. */
- nfsdstats.rchits++;
+ nfsd_reply_cache_free_locked(NULL, rp, nn);
+ nfsd_stats_rc_hits_inc();
rtn = RC_DROPIT;
+ rp = found;
/* Request being processed */
if (rp->c_state == RC_INPROG)
@@ -506,7 +529,6 @@ void nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct svc_cacherep *rp = rqstp->rq_cacherep;
struct kvec *resv = &rqstp->rq_res.head[0], *cachv;
- u32 hash;
struct nfsd_drc_bucket *b;
int len;
size_t bufsize = 0;
@@ -514,8 +536,7 @@ void nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
if (!rp)
return;
- hash = nfsd_cache_hash(rp->c_key.k_xid, nn);
- b = &nn->drc_hashtbl[hash];
+ b = nfsd_cache_bucket_find(rp->c_key.k_xid, nn);
len = resv->iov_len - ((char*)statp - (char*)resv->iov_base);
len >>= 2;
@@ -548,7 +569,7 @@ void nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
return;
}
spin_lock(&b->cache_lock);
- nn->drc_mem_usage += bufsize;
+ nfsd_stats_drc_mem_usage_add(nn, bufsize);
lru_put_end(b, rp);
rp->c_secure = test_bit(RQ_SECURE, &rqstp->rq_flags);
rp->c_type = cachetype;
@@ -582,28 +603,26 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
* scraping this file for info should test the labels to ensure they're
* getting the correct field.
*/
-static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
+int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
{
- struct nfsd_net *nn = m->private;
+ struct nfsd_net *nn = net_generic(file_inode(m->file)->i_sb->s_fs_info,
+ nfsd_net_id);
seq_printf(m, "max entries: %u\n", nn->max_drc_entries);
seq_printf(m, "num entries: %u\n",
- atomic_read(&nn->num_drc_entries));
+ atomic_read(&nn->num_drc_entries));
seq_printf(m, "hash buckets: %u\n", 1 << nn->maskbits);
- seq_printf(m, "mem usage: %u\n", nn->drc_mem_usage);
- seq_printf(m, "cache hits: %u\n", nfsdstats.rchits);
- seq_printf(m, "cache misses: %u\n", nfsdstats.rcmisses);
- seq_printf(m, "not cached: %u\n", nfsdstats.rcnocache);
- seq_printf(m, "payload misses: %u\n", nn->payload_misses);
+ seq_printf(m, "mem usage: %lld\n",
+ percpu_counter_sum_positive(&nn->counter[NFSD_NET_DRC_MEM_USAGE]));
+ seq_printf(m, "cache hits: %lld\n",
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]));
+ seq_printf(m, "cache misses: %lld\n",
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]));
+ seq_printf(m, "not cached: %lld\n",
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]));
+ seq_printf(m, "payload misses: %lld\n",
+ percpu_counter_sum_positive(&nn->counter[NFSD_NET_PAYLOAD_MISSES]));
seq_printf(m, "longest chain len: %u\n", nn->longest_chain);
seq_printf(m, "cachesize at longest: %u\n", nn->longest_chain_cachesize);
return 0;
}
-
-int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
-{
- struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
- nfsd_net_id);
-
- return single_open(file, nfsd_reply_cache_stats_show, nn);
-}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index c4b11560ac1b..f77f00c93172 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -25,6 +25,7 @@
#include "state.h"
#include "netns.h"
#include "pnfs.h"
+#include "filecache.h"
/*
* We have a single directory with several nodes in it.
@@ -32,6 +33,7 @@
enum {
NFSD_Root = 1,
NFSD_List,
+ NFSD_Export_Stats,
NFSD_Export_features,
NFSD_Fh,
NFSD_FO_UnlockIP,
@@ -44,6 +46,7 @@ enum {
NFSD_Ports,
NFSD_MaxBlkSize,
NFSD_MaxConnections,
+ NFSD_Filecache,
NFSD_SupportedEnctypes,
/*
* The below MUST come last. Otherwise we leave a hole in nfsd_files[]
@@ -182,17 +185,7 @@ static int export_features_show(struct seq_file *m, void *v)
return 0;
}
-static int export_features_open(struct inode *inode, struct file *file)
-{
- return single_open(file, export_features_show, NULL);
-}
-
-static const struct file_operations export_features_operations = {
- .open = export_features_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(export_features);
#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
static int supported_enctypes_show(struct seq_file *m, void *v)
@@ -201,17 +194,7 @@ static int supported_enctypes_show(struct seq_file *m, void *v)
return 0;
}
-static int supported_enctypes_open(struct inode *inode, struct file *file)
-{
- return single_open(file, supported_enctypes_show, NULL);
-}
-
-static const struct file_operations supported_enctypes_ops = {
- .open = supported_enctypes_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(supported_enctypes);
#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
static const struct file_operations pool_stats_operations = {
@@ -221,12 +204,9 @@ static const struct file_operations pool_stats_operations = {
.release = nfsd_pool_stats_release,
};
-static const struct file_operations reply_cache_stats_operations = {
- .open = nfsd_reply_cache_stats_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats);
+
+DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats);
/*----------------------------------------------------------------------------*/
/*
@@ -394,12 +374,12 @@ static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
auth_domain_put(dom);
if (len)
return len;
-
+
mesg = buf;
len = SIMPLE_TRANSACTION_LIMIT;
- qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
+ qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size);
mesg[-1] = '\n';
- return mesg - buf;
+ return mesg - buf;
}
/*
@@ -601,7 +581,9 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET;
switch(num) {
+#ifdef CONFIG_NFSD_V2
case 2:
+#endif
case 3:
nfsd_vers(nn, num, cmd);
break;
@@ -621,7 +603,9 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
}
break;
default:
- return -EINVAL;
+ /* Ignore requests to disable non-existent versions */
+ if (cmd == NFSD_SET)
+ return -EINVAL;
}
vers += len + 1;
} while ((len = qword_get(&mesg, vers, size)) > 0);
@@ -632,7 +616,6 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
}
/* Now write current state into reply buffer */
- len = 0;
sep = "";
remaining = SIMPLE_TRANSACTION_LIMIT;
for (num=2 ; num <= 4 ; num++) {
@@ -726,28 +709,25 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred
char *mesg = buf;
int fd, err;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv;
err = get_int(&mesg, &fd);
if (err != 0 || fd < 0)
return -EINVAL;
- if (svc_alien_sock(net, fd)) {
- printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__);
- return -EINVAL;
- }
-
err = nfsd_create_serv(net);
if (err != 0)
return err;
- err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);
- if (err < 0) {
- nfsd_destroy(net);
- return err;
- }
+ serv = nn->nfsd_serv;
+ err = svc_addsock(serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);
+
+ if (err < 0 && !serv->sv_nrthreads && !nn->keep_active)
+ nfsd_last_thread(net);
+ else if (err >= 0 && !serv->sv_nrthreads && !xchg(&nn->keep_active, 1))
+ svc_get(serv);
- /* Decrease the count, but don't shut down the service */
- nn->nfsd_serv->sv_nrthreads--;
+ svc_put(serv);
return err;
}
@@ -761,6 +741,7 @@ static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cr
struct svc_xprt *xprt;
int port, err;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv;
if (sscanf(buf, "%15s %5u", transport, &port) != 2)
return -EINVAL;
@@ -772,30 +753,33 @@ static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cr
if (err != 0)
return err;
- err = svc_create_xprt(nn->nfsd_serv, transport, net,
- PF_INET, port, SVC_SOCK_ANONYMOUS, cred);
+ serv = nn->nfsd_serv;
+ err = svc_xprt_create(serv, transport, net,
+ PF_INET, port, SVC_SOCK_ANONYMOUS, cred);
if (err < 0)
goto out_err;
- err = svc_create_xprt(nn->nfsd_serv, transport, net,
- PF_INET6, port, SVC_SOCK_ANONYMOUS, cred);
+ err = svc_xprt_create(serv, transport, net,
+ PF_INET6, port, SVC_SOCK_ANONYMOUS, cred);
if (err < 0 && err != -EAFNOSUPPORT)
goto out_close;
- /* Decrease the count, but don't shut down the service */
- nn->nfsd_serv->sv_nrthreads--;
+ if (!serv->sv_nrthreads && !xchg(&nn->keep_active, 1))
+ svc_get(serv);
+
+ svc_put(serv);
return 0;
out_close:
- xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);
+ xprt = svc_find_xprt(serv, transport, net, PF_INET, port);
if (xprt != NULL) {
- svc_close_xprt(xprt);
+ svc_xprt_close(xprt);
svc_xprt_put(xprt);
}
out_err:
- if (!list_empty(&nn->nfsd_serv->sv_permsocks))
- nn->nfsd_serv->sv_nrthreads--;
- else
- nfsd_destroy(net);
+ if (!serv->sv_nrthreads && !nn->keep_active)
+ nfsd_last_thread(net);
+
+ svc_put(serv);
return err;
}
@@ -1168,6 +1152,7 @@ static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode)
inode->i_fop = &simple_dir_operations;
inode->i_op = &simple_dir_inode_operations;
inc_nlink(inode);
+ break;
default:
break;
}
@@ -1269,7 +1254,8 @@ static void nfsdfs_remove_files(struct dentry *root)
/* XXX: cut'n'paste from simple_fill_super; figure out if we could share
* code instead. */
static int nfsdfs_create_files(struct dentry *root,
- const struct tree_descr *files)
+ const struct tree_descr *files,
+ struct dentry **fdentries)
{
struct inode *dir = d_inode(root);
struct inode *inode;
@@ -1278,8 +1264,6 @@ static int nfsdfs_create_files(struct dentry *root,
inode_lock(dir);
for (i = 0; files->name && files->name[0]; i++, files++) {
- if (!files->name)
- continue;
dentry = d_alloc_name(root, files->name);
if (!dentry)
goto out;
@@ -1293,6 +1277,8 @@ static int nfsdfs_create_files(struct dentry *root,
inode->i_private = __get_nfsdfs_client(dir);
d_add(dentry, inode);
fsnotify_create(dir, dentry);
+ if (fdentries)
+ fdentries[i] = dentry;
}
inode_unlock(dir);
return 0;
@@ -1304,8 +1290,9 @@ static int nfsdfs_create_files(struct dentry *root,
/* on success, returns positive number unique to that client. */
struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
- struct nfsdfs_client *ncl, u32 id,
- const struct tree_descr *files)
+ struct nfsdfs_client *ncl, u32 id,
+ const struct tree_descr *files,
+ struct dentry **fdentries)
{
struct dentry *dentry;
char name[11];
@@ -1316,7 +1303,7 @@ struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);
if (IS_ERR(dentry)) /* XXX: tossing errors? */
return NULL;
- ret = nfsdfs_create_files(dentry, files);
+ ret = nfsdfs_create_files(dentry, files, fdentries);
if (ret) {
nfsd_client_rmdir(dentry);
return NULL;
@@ -1352,8 +1339,10 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
static const struct tree_descr nfsd_files[] = {
[NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
+ /* Per-export io stats use same ops as exports file */
+ [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO},
[NFSD_Export_features] = {"export_features",
- &export_features_operations, S_IRUGO},
+ &export_features_fops, S_IRUGO},
[NFSD_FO_UnlockIP] = {"unlock_ip",
&transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_FO_UnlockFS] = {"unlock_filesystem",
@@ -1362,13 +1351,16 @@ static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc)
[NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
- [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
+ [NFSD_Reply_Cache_Stats] = {"reply_cache_stats",
+ &nfsd_reply_cache_stats_fops, S_IRUGO},
[NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
[NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
[NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO},
+ [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO},
#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
- [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
+ [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes",
+ &supported_enctypes_fops, S_IRUGO},
#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
#ifdef CONFIG_NFSD_V4
[NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
@@ -1468,25 +1460,16 @@ static __net_init int nfsd_init_net(struct net *net)
goto out_idmap_error;
nn->nfsd_versions = NULL;
nn->nfsd4_minorversions = NULL;
+ nfsd4_init_leases_net(nn);
retval = nfsd_reply_cache_init(nn);
if (retval)
- goto out_drc_error;
- nn->nfsd4_lease = 90; /* default lease time */
- nn->nfsd4_grace = 90;
- nn->somebody_reclaimed = false;
- nn->track_reclaim_completes = false;
- nn->clverifier_counter = prandom_u32();
- nn->clientid_base = prandom_u32();
- nn->clientid_counter = nn->clientid_base + 1;
- nn->s2s_cp_cl_id = nn->clientid_counter++;
-
- atomic_set(&nn->ntf_refcnt, 0);
- init_waitqueue_head(&nn->ntf_wq);
- seqlock_init(&nn->boot_lock);
+ goto out_cache_error;
+ get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key));
+ seqlock_init(&nn->writeverf_lock);
return 0;
-out_drc_error:
+out_cache_error:
nfsd_idmap_shutdown(net);
out_idmap_error:
nfsd_export_shutdown(net);
@@ -1514,7 +1497,6 @@ static struct pernet_operations nfsd_net_ops = {
static int __init init_nfsd(void)
{
int retval;
- printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@...ad.swb.de).\n");
retval = nfsd4_init_slabs();
if (retval)
@@ -1522,7 +1504,9 @@ static int __init init_nfsd(void)
retval = nfsd4_init_pnfs();
if (retval)
goto out_free_slabs;
- nfsd_stat_init(); /* Statistics */
+ retval = nfsd_stat_init(); /* Statistics */
+ if (retval)
+ goto out_free_pnfs;
retval = nfsd_drc_slab_create();
if (retval)
goto out_free_stat;
@@ -1530,20 +1514,25 @@ static int __init init_nfsd(void)
retval = create_proc_exports_entry();
if (retval)
goto out_free_lockd;
- retval = register_filesystem(&nfsd_fs_type);
- if (retval)
- goto out_free_exports;
retval = register_pernet_subsys(&nfsd_net_ops);
if (retval < 0)
- goto out_free_filesystem;
+ goto out_free_exports;
retval = register_cld_notifier();
+ if (retval)
+ goto out_free_subsys;
+ retval = nfsd4_create_laundry_wq();
+ if (retval)
+ goto out_free_cld;
+ retval = register_filesystem(&nfsd_fs_type);
if (retval)
goto out_free_all;
return 0;
out_free_all:
+ nfsd4_destroy_laundry_wq();
+out_free_cld:
+ unregister_cld_notifier();
+out_free_subsys:
unregister_pernet_subsys(&nfsd_net_ops);
-out_free_filesystem:
- unregister_filesystem(&nfsd_fs_type);
out_free_exports:
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
@@ -1552,6 +1541,7 @@ static int __init init_nfsd(void)
nfsd_drc_slab_free();
out_free_stat:
nfsd_stat_shutdown();
+out_free_pnfs:
nfsd4_exit_pnfs();
out_free_slabs:
nfsd4_free_slabs();
@@ -1560,6 +1550,8 @@ static int __init init_nfsd(void)
static void __exit exit_nfsd(void)
{
+ unregister_filesystem(&nfsd_fs_type);
+ nfsd4_destroy_laundry_wq();
unregister_cld_notifier();
unregister_pernet_subsys(&nfsd_net_ops);
nfsd_drc_slab_free();
@@ -1569,7 +1561,6 @@ static void __exit exit_nfsd(void)
nfsd_lockd_shutdown();
nfsd4_free_slabs();
nfsd4_exit_pnfs();
- unregister_filesystem(&nfsd_fs_type);
}
MODULE_AUTHOR("Olaf Kirch <okir@...ad.swb.de>");
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 4362d295ed34..013bfa24ced2 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -24,8 +24,8 @@
#include <uapi/linux/nfsd/debug.h>
#include "netns.h"
-#include "stats.h"
#include "export.h"
+#include "stats.h"
#undef ifdebug
#ifdef CONFIG_SUNRPC_DEBUG
@@ -64,8 +64,7 @@ struct readdir_cd {
extern struct svc_program nfsd_program;
-extern const struct svc_version nfsd_version2, nfsd_version3,
- nfsd_version4;
+extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
extern struct mutex nfsd_mutex;
extern spinlock_t nfsd_drc_lock;
extern unsigned long nfsd_drc_max_mem;
@@ -73,6 +72,16 @@ extern unsigned long nfsd_drc_mem_used;
extern const struct seq_operations nfs_exports_op;
+/*
+ * Common void argument and result helpers
+ */
+struct nfsd_voidargs { };
+struct nfsd_voidres { };
+bool nfssvc_decode_voidarg(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr);
+bool nfssvc_encode_voidres(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr);
+
/*
* Function prototypes.
*/
@@ -87,8 +96,6 @@ int nfsd_pool_stats_open(struct inode *, struct file *);
int nfsd_pool_stats_release(struct inode *, struct file *);
void nfsd_shutdown_threads(struct net *net);
-void nfsd_destroy(struct net *net);
-
bool i_am_nfsd(void);
struct nfsdfs_client {
@@ -98,7 +105,9 @@ struct nfsdfs_client {
struct nfsdfs_client *get_nfsdfs_client(struct inode *);
struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
- struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
+ struct nfsdfs_client *ncl, u32 id,
+ const struct tree_descr *,
+ struct dentry **fdentries);
void nfsd_client_rmdir(struct dentry *dentry);
@@ -122,6 +131,7 @@ int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
void nfsd_reset_versions(struct nfsd_net *nn);
int nfsd_create_serv(struct net *net);
+void nfsd_last_thread(struct net *net);
extern int nfsd_max_blksize;
@@ -150,6 +160,9 @@ void nfs4_state_shutdown_net(struct net *net);
int nfs4_reset_recoverydir(char *recdir);
char * nfs4_recoverydir(void);
bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
+int nfsd4_create_laundry_wq(void);
+void nfsd4_destroy_laundry_wq(void);
+bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
#else
static inline int nfsd4_init_slabs(void) { return 0; }
static inline void nfsd4_free_slabs(void) { }
@@ -163,6 +176,13 @@ static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
{
return false;
}
+static inline int nfsd4_create_laundry_wq(void) { return 0; };
+static inline void nfsd4_destroy_laundry_wq(void) {};
+static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
+ struct inode *inode)
+{
+ return false;
+}
#endif
/*
@@ -324,6 +344,10 @@ void nfsd_lockd_shutdown(void);
#define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
+#define NFSD_COURTESY_CLIENT_TIMEOUT (24 * 60 * 60) /* seconds */
+#define NFSD_CLIENT_MAX_TRIM_PER_RUN 128
+#define NFS4_CLIENTS_PER_GB 1024
+#define NFSD_DELEGRETURN_TIMEOUT (HZ / 34) /* 30ms */
/*
* The following attributes are currently not supported by the NFSv4 server:
@@ -352,7 +376,7 @@ void nfsd_lockd_shutdown(void);
| FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
| FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
| FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
- | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
+ | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_CREATE \
| FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
#define NFSD4_SUPPORTED_ATTRS_WORD2 0
@@ -386,7 +410,6 @@ void nfsd_lockd_shutdown(void);
#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
(NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
- FATTR4_WORD2_CHANGE_ATTR_TYPE | \
FATTR4_WORD2_MODE_UMASK | \
NFSD4_2_SECURITY_ATTRS | \
FATTR4_WORD2_XATTR_SUPPORT)
@@ -449,7 +472,8 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
#define NFSD_WRITEABLE_ATTRS_WORD1 \
(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
- | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
+ | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
+ | FATTR4_WORD1_TIME_MODIFY_SET)
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
FATTR4_WORD2_SECURITY_LABEL
@@ -475,12 +499,20 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
extern int nfsd4_is_junction(struct dentry *dentry);
extern int register_cld_notifier(void);
extern void unregister_cld_notifier(void);
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
+#endif
+
+extern void nfsd4_init_leases_net(struct nfsd_net *nn);
+
#else /* CONFIG_NFSD_V4 */
static inline int nfsd4_is_junction(struct dentry *dentry)
{
return 0;
}
+static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };
+
#define register_cld_notifier() 0
#define unregister_cld_notifier() do { } while(0)
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index c81dbbad8792..db8d62632a5b 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -153,11 +153,12 @@ static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
{
struct knfsd_fh *fh = &fhp->fh_handle;
- struct fid *fid = NULL, sfid;
+ struct fid *fid = NULL;
struct svc_export *exp;
struct dentry *dentry;
int fileid_type;
int data_left = fh->fh_size/4;
+ int len;
__be32 error;
error = nfserr_stale;
@@ -166,48 +167,35 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
if (rqstp->rq_vers == 4 && fh->fh_size == 0)
return nfserr_nofilehandle;
- if (fh->fh_version == 1) {
- int len;
-
- if (--data_left < 0)
- return error;
- if (fh->fh_auth_type != 0)
- return error;
- len = key_len(fh->fh_fsid_type) / 4;
- if (len == 0)
- return error;
- if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
- /* deprecated, convert to type 3 */
- len = key_len(FSID_ENCODE_DEV)/4;
- fh->fh_fsid_type = FSID_ENCODE_DEV;
- /*
- * struct knfsd_fh uses host-endian fields, which are
- * sometimes used to hold net-endian values. This
- * confuses sparse, so we must use __force here to
- * keep it from complaining.
- */
- fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
- ntohl((__force __be32)fh->fh_fsid[1])));
- fh->fh_fsid[1] = fh->fh_fsid[2];
- }
- data_left -= len;
- if (data_left < 0)
- return error;
- exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
- fid = (struct fid *)(fh->fh_fsid + len);
- } else {
- __u32 tfh[2];
- dev_t xdev;
- ino_t xino;
-
- if (fh->fh_size != NFS_FHSIZE)
- return error;
- /* assume old filehandle format */
- xdev = old_decode_dev(fh->ofh_xdev);
- xino = u32_to_ino_t(fh->ofh_xino);
- mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
- exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
+ if (fh->fh_version != 1)
+ return error;
+
+ if (--data_left < 0)
+ return error;
+ if (fh->fh_auth_type != 0)
+ return error;
+ len = key_len(fh->fh_fsid_type) / 4;
+ if (len == 0)
+ return error;
+ if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
+ /* deprecated, convert to type 3 */
+ len = key_len(FSID_ENCODE_DEV)/4;
+ fh->fh_fsid_type = FSID_ENCODE_DEV;
+ /*
+ * struct knfsd_fh uses host-endian fields, which are
+ * sometimes used to hold net-endian values. This
+ * confuses sparse, so we must use __force here to
+ * keep it from complaining.
+ */
+ fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
+ ntohl((__force __be32)fh->fh_fsid[1])));
+ fh->fh_fsid[1] = fh->fh_fsid[2];
}
+ data_left -= len;
+ if (data_left < 0)
+ return error;
+ exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
+ fid = (struct fid *)(fh->fh_fsid + len);
error = nfserr_stale;
if (IS_ERR(exp)) {
@@ -252,28 +240,25 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
if (rqstp->rq_vers > 2)
error = nfserr_badhandle;
- if (fh->fh_version != 1) {
- sfid.i32.ino = fh->ofh_ino;
- sfid.i32.gen = fh->ofh_generation;
- sfid.i32.parent_ino = fh->ofh_dirino;
- fid = &sfid;
- data_left = 3;
- if (fh->ofh_dirino == 0)
- fileid_type = FILEID_INO32_GEN;
- else
- fileid_type = FILEID_INO32_GEN_PARENT;
- } else
- fileid_type = fh->fh_fileid_type;
+ fileid_type = fh->fh_fileid_type;
if (fileid_type == FILEID_ROOT)
dentry = dget(exp->ex_path.dentry);
else {
- dentry = exportfs_decode_fh(exp->ex_path.mnt, fid,
- data_left, fileid_type,
- nfsd_acceptable, exp);
- if (IS_ERR_OR_NULL(dentry))
+ dentry = exportfs_decode_fh_raw(exp->ex_path.mnt, fid,
+ data_left, fileid_type,
+ nfsd_acceptable, exp);
+ if (IS_ERR_OR_NULL(dentry)) {
trace_nfsd_set_fh_dentry_badhandle(rqstp, fhp,
dentry ? PTR_ERR(dentry) : -ESTALE);
+ switch (PTR_ERR(dentry)) {
+ case -ENOMEM:
+ case -ETIMEDOUT:
+ break;
+ default:
+ dentry = ERR_PTR(-ESTALE);
+ }
+ }
}
if (dentry == NULL)
goto out;
@@ -291,6 +276,20 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
fhp->fh_dentry = dentry;
fhp->fh_export = exp;
+
+ switch (rqstp->rq_vers) {
+ case 4:
+ if (dentry->d_sb->s_export_op->flags & EXPORT_OP_NOATOMIC_ATTR)
+ fhp->fh_no_atomic_attr = true;
+ break;
+ case 3:
+ if (dentry->d_sb->s_export_op->flags & EXPORT_OP_NOWCC)
+ fhp->fh_no_wcc = true;
+ break;
+ case 2:
+ fhp->fh_no_wcc = true;
+ }
+
return 0;
out:
exp_put(exp);
@@ -327,7 +326,7 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
__be32
fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
{
- struct svc_export *exp;
+ struct svc_export *exp = NULL;
struct dentry *dentry;
__be32 error;
@@ -400,7 +399,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, int access)
}
out:
if (error == nfserr_stale)
- nfsdstats.fh_stale++;
+ nfsd_stats_fh_stale_inc(exp);
return error;
}
@@ -429,20 +428,6 @@ static void _fh_update(struct svc_fh *fhp, struct svc_export *exp,
}
}
-/*
- * for composing old style file handles
- */
-static inline void _fh_update_old(struct dentry *dentry,
- struct svc_export *exp,
- struct knfsd_fh *fh)
-{
- fh->ofh_ino = ino_t_to_u32(d_inode(dentry)->i_ino);
- fh->ofh_generation = d_inode(dentry)->i_generation;
- if (d_is_dir(dentry) ||
- (exp->ex_flags & NFSEXP_NOSUBTREECHECK))
- fh->ofh_dirino = 0;
-}
-
static bool is_root_export(struct svc_export *exp)
{
return exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root;
@@ -539,9 +524,6 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
/* ref_fh is a reference file handle.
* if it is non-null and for the same filesystem, then we should compose
* a filehandle which is of the same version, where possible.
- * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
- * Then create a 32byte filehandle using nfs_fhbase_old
- *
*/
struct inode * inode = d_inode(dentry);
@@ -559,10 +541,13 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
*/
set_version_and_fsid_type(fhp, exp, ref_fh);
+ /* If we have a ref_fh, then copy the fh_no_wcc setting from it. */
+ fhp->fh_no_wcc = ref_fh ? ref_fh->fh_no_wcc : false;
+
if (ref_fh == fhp)
fh_put(ref_fh);
- if (fhp->fh_locked || fhp->fh_dentry) {
+ if (fhp->fh_dentry) {
printk(KERN_ERR "fh_compose: fh %pd2 not initialized!\n",
dentry);
}
@@ -574,35 +559,21 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
fhp->fh_dentry = dget(dentry); /* our internal copy */
fhp->fh_export = exp_get(exp);
- if (fhp->fh_handle.fh_version == 0xca) {
- /* old style filehandle please */
- memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
- fhp->fh_handle.fh_size = NFS_FHSIZE;
- fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
- fhp->fh_handle.ofh_dev = old_encode_dev(ex_dev);
- fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
- fhp->fh_handle.ofh_xino =
- ino_t_to_u32(d_inode(exp->ex_path.dentry)->i_ino);
- fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
- if (inode)
- _fh_update_old(dentry, exp, &fhp->fh_handle);
- } else {
- fhp->fh_handle.fh_size =
- key_len(fhp->fh_handle.fh_fsid_type) + 4;
- fhp->fh_handle.fh_auth_type = 0;
-
- mk_fsid(fhp->fh_handle.fh_fsid_type,
- fhp->fh_handle.fh_fsid,
- ex_dev,
- d_inode(exp->ex_path.dentry)->i_ino,
- exp->ex_fsid, exp->ex_uuid);
-
- if (inode)
- _fh_update(fhp, exp, dentry);
- if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
- fh_put(fhp);
- return nfserr_opnotsupp;
- }
+ fhp->fh_handle.fh_size =
+ key_len(fhp->fh_handle.fh_fsid_type) + 4;
+ fhp->fh_handle.fh_auth_type = 0;
+
+ mk_fsid(fhp->fh_handle.fh_fsid_type,
+ fhp->fh_handle.fh_fsid,
+ ex_dev,
+ d_inode(exp->ex_path.dentry)->i_ino,
+ exp->ex_fsid, exp->ex_uuid);
+
+ if (inode)
+ _fh_update(fhp, exp, dentry);
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
+ fh_put(fhp);
+ return nfserr_opnotsupp;
}
return 0;
@@ -623,16 +594,12 @@ fh_update(struct svc_fh *fhp)
dentry = fhp->fh_dentry;
if (d_really_is_negative(dentry))
goto out_negative;
- if (fhp->fh_handle.fh_version != 1) {
- _fh_update_old(dentry, fhp->fh_export, &fhp->fh_handle);
- } else {
- if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
- return 0;
+ if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
+ return 0;
- _fh_update(fhp, fhp->fh_export, dentry);
- if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
- return nfserr_opnotsupp;
- }
+ _fh_update(fhp, fhp->fh_export, dentry);
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
+ return nfserr_opnotsupp;
return 0;
out_bad:
printk(KERN_ERR "fh_update: fh not verified!\n");
@@ -643,6 +610,85 @@ fh_update(struct svc_fh *fhp)
return nfserr_serverfault;
}
+/**
+ * fh_fill_pre_attrs - Fill in pre-op attributes
+ * @fhp: file handle to be updated
+ *
+ */
+void fh_fill_pre_attrs(struct svc_fh *fhp)
+{
+ bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
+ struct inode *inode;
+ struct kstat stat;
+ __be32 err;
+
+ if (fhp->fh_no_wcc || fhp->fh_pre_saved)
+ return;
+
+ inode = d_inode(fhp->fh_dentry);
+ err = fh_getattr(fhp, &stat);
+ if (err) {
+ /* Grab the times from inode anyway */
+ stat.mtime = inode->i_mtime;
+ stat.ctime = inode->i_ctime;
+ stat.size = inode->i_size;
+ }
+ if (v4)
+ fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
+
+ fhp->fh_pre_mtime = stat.mtime;
+ fhp->fh_pre_ctime = stat.ctime;
+ fhp->fh_pre_size = stat.size;
+ fhp->fh_pre_saved = true;
+}
+
+/**
+ * fh_fill_post_attrs - Fill in post-op attributes
+ * @fhp: file handle to be updated
+ *
+ */
+void fh_fill_post_attrs(struct svc_fh *fhp)
+{
+ bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE);
+ struct inode *inode = d_inode(fhp->fh_dentry);
+ __be32 err;
+
+ if (fhp->fh_no_wcc)
+ return;
+
+ if (fhp->fh_post_saved)
+ printk("nfsd: inode locked twice during operation.\n");
+
+ err = fh_getattr(fhp, &fhp->fh_post_attr);
+ if (err) {
+ fhp->fh_post_saved = false;
+ fhp->fh_post_attr.ctime = inode->i_ctime;
+ } else
+ fhp->fh_post_saved = true;
+ if (v4)
+ fhp->fh_post_change =
+ nfsd4_change_attribute(&fhp->fh_post_attr, inode);
+}
+
+/**
+ * fh_fill_both_attrs - Fill pre-op and post-op attributes
+ * @fhp: file handle to be updated
+ *
+ * This is used when the directory wasn't changed, but wcc attributes
+ * are needed anyway.
+ */
+void fh_fill_both_attrs(struct svc_fh *fhp)
+{
+ fh_fill_post_attrs(fhp);
+ if (!fhp->fh_post_saved)
+ return;
+ fhp->fh_pre_change = fhp->fh_post_change;
+ fhp->fh_pre_mtime = fhp->fh_post_attr.mtime;
+ fhp->fh_pre_ctime = fhp->fh_post_attr.ctime;
+ fhp->fh_pre_size = fhp->fh_post_attr.size;
+ fhp->fh_pre_saved = true;
+}
+
/*
* Release a file handle.
*/
@@ -652,16 +698,16 @@ fh_put(struct svc_fh *fhp)
struct dentry * dentry = fhp->fh_dentry;
struct svc_export * exp = fhp->fh_export;
if (dentry) {
- fh_unlock(fhp);
fhp->fh_dentry = NULL;
dput(dentry);
- fh_clear_wcc(fhp);
+ fh_clear_pre_post_attrs(fhp);
}
fh_drop_write(fhp);
if (exp) {
exp_put(exp);
fhp->fh_export = NULL;
}
+ fhp->fh_no_wcc = false;
return;
}
@@ -671,20 +717,15 @@ fh_put(struct svc_fh *fhp)
char * SVCFH_fmt(struct svc_fh *fhp)
{
struct knfsd_fh *fh = &fhp->fh_handle;
+ static char buf[2+1+1+64*3+1];
- static char buf[80];
- sprintf(buf, "%d: %08x %08x %08x %08x %08x %08x",
- fh->fh_size,
- fh->fh_base.fh_pad[0],
- fh->fh_base.fh_pad[1],
- fh->fh_base.fh_pad[2],
- fh->fh_base.fh_pad[3],
- fh->fh_base.fh_pad[4],
- fh->fh_base.fh_pad[5]);
+ if (fh->fh_size < 0 || fh->fh_size> 64)
+ return "bad-fh";
+ sprintf(buf, "%d: %*ph", fh->fh_size, fh->fh_size, fh->fh_raw);
return buf;
}
-enum fsid_source fsid_source(struct svc_fh *fhp)
+enum fsid_source fsid_source(const struct svc_fh *fhp)
{
if (fhp->fh_handle.fh_version != 1)
return FSIDSOURCE_DEV;
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index 56cfbc361561..513e028b0bbe 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -10,8 +10,56 @@
#include <linux/crc32.h>
#include <linux/sunrpc/svc.h>
-#include <uapi/linux/nfsd/nfsfh.h>
#include <linux/iversion.h>
+#include <linux/exportfs.h>
+#include <linux/nfs4.h>
+
+/*
+ * The file handle starts with a sequence of four-byte words.
+ * The first word contains a version number (1) and three descriptor bytes
+ * that tell how the remaining 3 variable length fields should be handled.
+ * These three bytes are auth_type, fsid_type and fileid_type.
+ *
+ * All four-byte values are in host-byte-order.
+ *
+ * The auth_type field is deprecated and must be set to 0.
+ *
+ * The fsid_type identifies how the filesystem (or export point) is
+ * encoded.
+ * Current values:
+ * 0 - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
+ * NOTE: we cannot use the kdev_t device id value, because kdev_t.h
+ * says we mustn't. We must break it up and reassemble.
+ * 1 - 4 byte user specified identifier
+ * 2 - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
+ * 3 - 4 byte device id, encoded for user-space, 4 byte inode number
+ * 4 - 4 byte inode number and 4 byte uuid
+ * 5 - 8 byte uuid
+ * 6 - 16 byte uuid
+ * 7 - 8 byte inode number and 16 byte uuid
+ *
+ * The fileid_type identifies how the file within the filesystem is encoded.
+ * The values for this field are filesystem specific, exccept that
+ * filesystems must not use the values '0' or '0xff'. 'See enum fid_type'
+ * in include/linux/exportfs.h for currently registered values.
+ */
+
+struct knfsd_fh {
+ unsigned int fh_size; /*
+ * Points to the current size while
+ * building a new file handle.
+ */
+ union {
+ char fh_raw[NFS4_FHSIZE];
+ struct {
+ u8 fh_version; /* == 1 */
+ u8 fh_auth_type; /* deprecated */
+ u8 fh_fsid_type;
+ u8 fh_fileid_type;
+ u32 fh_fsid[]; /* flexible-array member */
+ };
+ };
+};
static inline __u32 ino_t_to_u32(ino_t ino)
{
@@ -33,14 +81,18 @@ typedef struct svc_fh {
struct dentry * fh_dentry; /* validated dentry */
struct svc_export * fh_export; /* export pointer */
- bool fh_locked; /* inode locked by us */
bool fh_want_write; /* remount protection taken */
+ bool fh_no_wcc; /* no wcc data needed */
+ bool fh_no_atomic_attr;
+ /*
+ * wcc data is not atomic with
+ * operation
+ */
int fh_flags; /* FH flags */
-#ifdef CONFIG_NFSD_V3
bool fh_post_saved; /* post-op attrs saved */
bool fh_pre_saved; /* pre-op attrs saved */
- /* Pre-op attributes saved during fh_lock */
+ /* Pre-op attributes saved when inode is locked */
__u64 fh_pre_size; /* size before operation */
struct timespec64 fh_pre_mtime; /* mtime before oper */
struct timespec64 fh_pre_ctime; /* ctime before oper */
@@ -50,11 +102,9 @@ typedef struct svc_fh {
*/
u64 fh_pre_change;
- /* Post-op attributes saved in fh_unlock */
+ /* Post-op attributes saved in fh_fill_post_attrs() */
struct kstat fh_post_attr; /* full attrs after operation */
u64 fh_post_change; /* nfsv4 change; see above */
-#endif /* CONFIG_NFSD_V3 */
-
} svc_fh;
#define NFSD4_FH_FOREIGN (1<<0)
#define SET_FH_FLAG(c, f) ((c)->fh_flags |= (f))
@@ -76,7 +126,7 @@ enum fsid_source {
FSIDSOURCE_FSID,
FSIDSOURCE_UUID,
};
-extern enum fsid_source fsid_source(struct svc_fh *fhp);
+extern enum fsid_source fsid_source(const struct svc_fh *fhp);
/*
@@ -170,19 +220,19 @@ __be32 fh_update(struct svc_fh *);
void fh_put(struct svc_fh *);
static __inline__ struct svc_fh *
-fh_copy(struct svc_fh *dst, struct svc_fh *src)
+fh_copy(struct svc_fh *dst, const struct svc_fh *src)
{
- WARN_ON(src->fh_dentry || src->fh_locked);
-
+ WARN_ON(src->fh_dentry);
+
*dst = *src;
return dst;
}
static inline void
-fh_copy_shallow(struct knfsd_fh *dst, struct knfsd_fh *src)
+fh_copy_shallow(struct knfsd_fh *dst, const struct knfsd_fh *src)
{
dst->fh_size = src->fh_size;
- memcpy(&dst->fh_base, &src->fh_base, src->fh_size);
+ memcpy(&dst->fh_raw, &src->fh_raw, src->fh_size);
}
static __inline__ struct svc_fh *
@@ -193,16 +243,18 @@ fh_init(struct svc_fh *fhp, int maxsize)
return fhp;
}
-static inline bool fh_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2)
+static inline bool fh_match(const struct knfsd_fh *fh1,
+ const struct knfsd_fh *fh2)
{
if (fh1->fh_size != fh2->fh_size)
return false;
- if (memcmp(fh1->fh_base.fh_pad, fh2->fh_base.fh_pad, fh1->fh_size) != 0)
+ if (memcmp(fh1->fh_raw, fh2->fh_raw, fh1->fh_size) != 0)
return false;
return true;
}
-static inline bool fh_fsid_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2)
+static inline bool fh_fsid_match(const struct knfsd_fh *fh1,
+ const struct knfsd_fh *fh2)
{
if (fh1->fh_fsid_type != fh2->fh_fsid_type)
return false;
@@ -219,27 +271,23 @@ static inline bool fh_fsid_match(struct knfsd_fh *fh1, struct knfsd_fh *fh2)
* returns a crc32 hash for the filehandle that is compatible with
* the one displayed by "wireshark".
*/
-
-static inline u32
-knfsd_fh_hash(struct knfsd_fh *fh)
+static inline u32 knfsd_fh_hash(const struct knfsd_fh *fh)
{
- return ~crc32_le(0xFFFFFFFF, (unsigned char *)&fh->fh_base, fh->fh_size);
+ return ~crc32_le(0xFFFFFFFF, fh->fh_raw, fh->fh_size);
}
#else
-static inline u32
-knfsd_fh_hash(struct knfsd_fh *fh)
+static inline u32 knfsd_fh_hash(const struct knfsd_fh *fh)
{
return 0;
}
#endif
-#ifdef CONFIG_NFSD_V3
-/*
- * The wcc data stored in current_fh should be cleared
- * between compound ops.
+/**
+ * fh_clear_pre_post_attrs - Reset pre/post attributes
+ * @fhp: file handle to be updated
+ *
*/
-static inline void
-fh_clear_wcc(struct svc_fh *fhp)
+static inline void fh_clear_pre_post_attrs(struct svc_fh *fhp)
{
fhp->fh_post_saved = false;
fhp->fh_pre_saved = false;
@@ -259,68 +307,21 @@ fh_clear_wcc(struct svc_fh *fhp)
static inline u64 nfsd4_change_attribute(struct kstat *stat,
struct inode *inode)
{
- u64 chattr;
-
- chattr = stat->ctime.tv_sec;
- chattr <<= 30;
- chattr += stat->ctime.tv_nsec;
- chattr += inode_query_iversion(inode);
- return chattr;
-}
-
-extern void fill_pre_wcc(struct svc_fh *fhp);
-extern void fill_post_wcc(struct svc_fh *fhp);
-#else
-#define fh_clear_wcc(ignored)
-#define fill_pre_wcc(ignored)
-#define fill_post_wcc(notused)
-#endif /* CONFIG_NFSD_V3 */
-
-
-/*
- * Lock a file handle/inode
- * NOTE: both fh_lock and fh_unlock are done "by hand" in
- * vfs.c:nfsd_rename as it needs to grab 2 i_mutex's at once
- * so, any changes here should be reflected there.
- */
-
-static inline void
-fh_lock_nested(struct svc_fh *fhp, unsigned int subclass)
-{
- struct dentry *dentry = fhp->fh_dentry;
- struct inode *inode;
-
- BUG_ON(!dentry);
-
- if (fhp->fh_locked) {
- printk(KERN_WARNING "fh_lock: %pd2 already locked!\n",
- dentry);
- return;
- }
-
- inode = d_inode(dentry);
- inode_lock_nested(inode, subclass);
- fill_pre_wcc(fhp);
- fhp->fh_locked = true;
-}
-
-static inline void
-fh_lock(struct svc_fh *fhp)
-{
- fh_lock_nested(fhp, I_MUTEX_NORMAL);
-}
-
-/*
- * Unlock a file handle/inode
- */
-static inline void
-fh_unlock(struct svc_fh *fhp)
-{
- if (fhp->fh_locked) {
- fill_post_wcc(fhp);
- inode_unlock(d_inode(fhp->fh_dentry));
- fhp->fh_locked = false;
- }
+ if (inode->i_sb->s_export_op->fetch_iversion)
+ return inode->i_sb->s_export_op->fetch_iversion(inode);
+ else if (IS_I_VERSION(inode)) {
+ u64 chattr;
+
+ chattr = stat->ctime.tv_sec;
+ chattr <<= 30;
+ chattr += stat->ctime.tv_nsec;
+ chattr += inode_query_iversion(inode);
+ return chattr;
+ } else
+ return time_to_chattr(&stat->ctime);
}
+extern void fh_fill_pre_attrs(struct svc_fh *fhp);
+extern void fh_fill_post_attrs(struct svc_fh *fhp);
+extern void fh_fill_both_attrs(struct svc_fh *fhp);
#endif /* _LINUX_NFSD_NFSFH_H */
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index bbd01e8397f6..96426dea7d41 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -51,6 +51,9 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
struct nfsd_sattrargs *argp = rqstp->rq_argp;
struct nfsd_attrstat *resp = rqstp->rq_resp;
struct iattr *iap = &argp->attrs;
+ struct nfsd_attrs attrs = {
+ .na_iattr = iap,
+ };
struct svc_fh *fhp;
dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
@@ -100,7 +103,7 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
}
}
- resp->status = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0);
+ resp->status = nfsd_setattr(rqstp, fhp, &attrs, 0, (time64_t)0);
if (resp->status != nfs_ok)
goto out;
@@ -149,14 +152,16 @@ nfsd_proc_lookup(struct svc_rqst *rqstp)
static __be32
nfsd_proc_readlink(struct svc_rqst *rqstp)
{
- struct nfsd_readlinkargs *argp = rqstp->rq_argp;
+ struct nfsd_fhandle *argp = rqstp->rq_argp;
struct nfsd_readlinkres *resp = rqstp->rq_resp;
dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
/* Read the symlink. */
resp->len = NFS_MAXPATHLEN;
- resp->status = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
+ resp->page = *(rqstp->rq_next_page++);
+ resp->status = nfsd_readlink(rqstp, &argp->fh,
+ page_address(resp->page), &resp->len);
fh_put(&argp->fh);
return rpc_success;
@@ -171,36 +176,42 @@ nfsd_proc_read(struct svc_rqst *rqstp)
{
struct nfsd_readargs *argp = rqstp->rq_argp;
struct nfsd_readres *resp = rqstp->rq_resp;
+ unsigned int len;
u32 eof;
+ int v;
dprintk("nfsd: READ %s %d bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->count, argp->offset);
+ argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2);
+ argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
+
+ v = 0;
+ len = argp->count;
+ resp->pages = rqstp->rq_next_page;
+ while (len > 0) {
+ struct page *page = *(rqstp->rq_next_page++);
+
+ rqstp->rq_vec[v].iov_base = page_address(page);
+ rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
+ len -= rqstp->rq_vec[v].iov_len;
+ v++;
+ }
+
/* Obtain buffer pointer for payload. 19 is 1 word for
* status, 17 words for fattr, and 1 word for the byte count.
*/
-
- if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
- char buf[RPC_MAX_ADDRBUFLEN];
- printk(KERN_NOTICE
- "oversized read request from %s (%d bytes)\n",
- svc_print_addr(rqstp, buf, sizeof(buf)),
- argp->count);
- argp->count = NFSSVC_MAXBLKSIZE_V2;
- }
svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
resp->count = argp->count;
- resp->status = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
- argp->offset,
- rqstp->rq_vec, argp->vlen,
- &resp->count,
- &eof);
+ fh_copy(&resp->fh, &argp->fh);
+ resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
+ rqstp->rq_vec, v, &resp->count, &eof);
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
- return rpc_drop_reply;
+ set_bit(RQ_DROPME, &rqstp->rq_flags);
return rpc_success;
}
@@ -227,12 +238,7 @@ nfsd_proc_write(struct svc_rqst *rqstp)
SVCFH_fmt(&argp->fh),
argp->len, argp->offset);
- nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
- &argp->first, cnt);
- if (!nvecs) {
- resp->status = nfserr_io;
- goto out;
- }
+ nvecs = svc_fill_write_vector(rqstp, &argp->payload);
resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
argp->offset, rqstp->rq_vec, nvecs,
@@ -240,8 +246,7 @@ nfsd_proc_write(struct svc_rqst *rqstp)
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
- return rpc_drop_reply;
-out:
+ set_bit(RQ_DROPME, &rqstp->rq_flags);
return rpc_success;
}
@@ -259,6 +264,9 @@ nfsd_proc_create(struct svc_rqst *rqstp)
svc_fh *dirfhp = &argp->fh;
svc_fh *newfhp = &resp->fh;
struct iattr *attr = &argp->attrs;
+ struct nfsd_attrs attrs = {
+ .na_iattr = attr,
+ };
struct inode *inode;
struct dentry *dchild;
int type, mode;
@@ -284,7 +292,7 @@ nfsd_proc_create(struct svc_rqst *rqstp)
goto done;
}
- fh_lock_nested(dirfhp, I_MUTEX_PARENT);
+ inode_lock_nested(dirfhp->fh_dentry->d_inode, I_MUTEX_PARENT);
dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
if (IS_ERR(dchild)) {
resp->status = nfserrno(PTR_ERR(dchild));
@@ -383,9 +391,8 @@ nfsd_proc_create(struct svc_rqst *rqstp)
resp->status = nfs_ok;
if (!inode) {
/* File doesn't exist. Create it and set attrs */
- resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name,
- argp->len, attr, type, rdev,
- newfhp);
+ resp->status = nfsd_create_locked(rqstp, dirfhp, &attrs, type,
+ rdev, newfhp);
} else if (type == S_IFREG) {
dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
argp->name, attr->ia_valid, (long) attr->ia_size);
@@ -395,13 +402,12 @@ nfsd_proc_create(struct svc_rqst *rqstp)
*/
attr->ia_valid &= ATTR_SIZE;
if (attr->ia_valid)
- resp->status = nfsd_setattr(rqstp, newfhp, attr, 0,
+ resp->status = nfsd_setattr(rqstp, newfhp, &attrs, 0,
(time64_t)0);
}
out_unlock:
- /* We don't really need to unlock, as fh_put does it. */
- fh_unlock(dirfhp);
+ inode_unlock(dirfhp->fh_dentry->d_inode);
fh_drop_write(dirfhp);
done:
fh_put(dirfhp);
@@ -471,6 +477,9 @@ nfsd_proc_symlink(struct svc_rqst *rqstp)
{
struct nfsd_symlinkargs *argp = rqstp->rq_argp;
struct nfsd_stat *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
struct svc_fh newfh;
if (argp->tlen > NFS_MAXPATHLEN) {
@@ -492,7 +501,7 @@ nfsd_proc_symlink(struct svc_rqst *rqstp)
fh_init(&newfh, NFS_FHSIZE);
resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
- argp->tname, &newfh);
+ argp->tname, &attrs, &newfh);
kfree(argp->tname);
fh_put(&argp->ffh);
@@ -510,6 +519,9 @@ nfsd_proc_mkdir(struct svc_rqst *rqstp)
{
struct nfsd_createargs *argp = rqstp->rq_argp;
struct nfsd_diropres *resp = rqstp->rq_resp;
+ struct nfsd_attrs attrs = {
+ .na_iattr = &argp->attrs,
+ };
dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
@@ -521,7 +533,7 @@ nfsd_proc_mkdir(struct svc_rqst *rqstp)
argp->attrs.ia_valid &= ~ATTR_SIZE;
fh_init(&resp->fh, NFS_FHSIZE);
resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
- &argp->attrs, S_IFDIR, 0, &resp->fh);
+ &attrs, S_IFDIR, 0, &resp->fh);
fh_put(&argp->fh);
if (resp->status != nfs_ok)
goto out;
@@ -548,6 +560,24 @@ nfsd_proc_rmdir(struct svc_rqst *rqstp)
return rpc_success;
}
+static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
+ struct nfsd_readdirres *resp,
+ u32 count)
+{
+ struct xdr_buf *buf = &resp->dirlist;
+ struct xdr_stream *xdr = &resp->xdr;
+
+ memset(buf, 0, sizeof(*buf));
+
+ /* Reserve room for the NULL ptr & eof flag (-2 words) */
+ buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), (u32)PAGE_SIZE);
+ buf->buflen -= XDR_UNIT * 2;
+ buf->pages = rqstp->rq_next_page;
+ rqstp->rq_next_page++;
+
+ xdr_init_encode_pages(xdr, buf, buf->pages, NULL);
+}
+
/*
* Read a portion of a directory.
*/
@@ -556,33 +586,20 @@ nfsd_proc_readdir(struct svc_rqst *rqstp)
{
struct nfsd_readdirargs *argp = rqstp->rq_argp;
struct nfsd_readdirres *resp = rqstp->rq_resp;
- int count;
loff_t offset;
dprintk("nfsd: READDIR %s %d bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->count, argp->cookie);
- /* Shrink to the client read size */
- count = (argp->count >> 2) - 2;
+ nfsd_init_dirlist_pages(rqstp, resp, argp->count);
- /* Make sure we've room for the NULL ptr & eof flag */
- count -= 2;
- if (count < 0)
- count = 0;
-
- resp->buffer = argp->buffer;
- resp->offset = NULL;
- resp->buflen = count;
resp->common.err = nfs_ok;
- /* Read directory and encode entries on the fly */
+ resp->cookie_offset = 0;
offset = argp->cookie;
resp->status = nfsd_readdir(rqstp, &argp->fh, &offset,
&resp->common, nfssvc_encode_entry);
-
- resp->count = resp->buffer - argp->buffer;
- if (resp->offset)
- *resp->offset = htonl(offset);
+ nfssvc_encode_nfscookie(resp, offset);
fh_put(&argp->fh);
return rpc_success;
@@ -609,7 +626,6 @@ nfsd_proc_statfs(struct svc_rqst *rqstp)
* NFSv2 Server procedures.
* Only the results of non-idempotent operations are cached.
*/
-struct nfsd_void { int dummy; };
#define ST 1 /* status */
#define FH 8 /* filehandle */
@@ -618,41 +634,49 @@ struct nfsd_void { int dummy; };
static const struct svc_procedure nfsd_procedures2[18] = {
[NFSPROC_NULL] = {
.pc_func = nfsd_proc_null,
- .pc_decode = nfssvc_decode_void,
- .pc_encode = nfssvc_encode_void,
- .pc_argsize = sizeof(struct nfsd_void),
- .pc_ressize = sizeof(struct nfsd_void),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
+ .pc_name = "NULL",
},
[NFSPROC_GETATTR] = {
.pc_func = nfsd_proc_getattr,
- .pc_decode = nfssvc_decode_fhandle,
- .pc_encode = nfssvc_encode_attrstat,
+ .pc_decode = nfssvc_decode_fhandleargs,
+ .pc_encode = nfssvc_encode_attrstatres,
.pc_release = nfssvc_release_attrstat,
.pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd_attrstat),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT,
+ .pc_name = "GETATTR",
},
[NFSPROC_SETATTR] = {
.pc_func = nfsd_proc_setattr,
.pc_decode = nfssvc_decode_sattrargs,
- .pc_encode = nfssvc_encode_attrstat,
+ .pc_encode = nfssvc_encode_attrstatres,
.pc_release = nfssvc_release_attrstat,
.pc_argsize = sizeof(struct nfsd_sattrargs),
+ .pc_argzero = sizeof(struct nfsd_sattrargs),
.pc_ressize = sizeof(struct nfsd_attrstat),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+AT,
+ .pc_name = "SETATTR",
},
[NFSPROC_ROOT] = {
.pc_func = nfsd_proc_root,
- .pc_decode = nfssvc_decode_void,
- .pc_encode = nfssvc_encode_void,
- .pc_argsize = sizeof(struct nfsd_void),
- .pc_ressize = sizeof(struct nfsd_void),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
+ .pc_name = "ROOT",
},
[NFSPROC_LOOKUP] = {
.pc_func = nfsd_proc_lookup,
@@ -660,18 +684,22 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_encode = nfssvc_encode_diropres,
.pc_release = nfssvc_release_diropres,
.pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_argzero = sizeof(struct nfsd_diropargs),
.pc_ressize = sizeof(struct nfsd_diropres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+FH+AT,
+ .pc_name = "LOOKUP",
},
[NFSPROC_READLINK] = {
.pc_func = nfsd_proc_readlink,
- .pc_decode = nfssvc_decode_readlinkargs,
+ .pc_decode = nfssvc_decode_fhandleargs,
.pc_encode = nfssvc_encode_readlinkres,
- .pc_argsize = sizeof(struct nfsd_readlinkargs),
+ .pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd_readlinkres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
+ .pc_name = "READLINK",
},
[NFSPROC_READ] = {
.pc_func = nfsd_proc_read,
@@ -679,28 +707,34 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_encode = nfssvc_encode_readres,
.pc_release = nfssvc_release_readres,
.pc_argsize = sizeof(struct nfsd_readargs),
+ .pc_argzero = sizeof(struct nfsd_readargs),
.pc_ressize = sizeof(struct nfsd_readres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
+ .pc_name = "READ",
},
[NFSPROC_WRITECACHE] = {
.pc_func = nfsd_proc_writecache,
- .pc_decode = nfssvc_decode_void,
- .pc_encode = nfssvc_encode_void,
- .pc_argsize = sizeof(struct nfsd_void),
- .pc_ressize = sizeof(struct nfsd_void),
+ .pc_decode = nfssvc_decode_voidarg,
+ .pc_encode = nfssvc_encode_voidres,
+ .pc_argsize = sizeof(struct nfsd_voidargs),
+ .pc_argzero = sizeof(struct nfsd_voidargs),
+ .pc_ressize = sizeof(struct nfsd_voidres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = 0,
+ .pc_name = "WRITECACHE",
},
[NFSPROC_WRITE] = {
.pc_func = nfsd_proc_write,
.pc_decode = nfssvc_decode_writeargs,
- .pc_encode = nfssvc_encode_attrstat,
+ .pc_encode = nfssvc_encode_attrstatres,
.pc_release = nfssvc_release_attrstat,
.pc_argsize = sizeof(struct nfsd_writeargs),
+ .pc_argzero = sizeof(struct nfsd_writeargs),
.pc_ressize = sizeof(struct nfsd_attrstat),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+AT,
+ .pc_name = "WRITE",
},
[NFSPROC_CREATE] = {
.pc_func = nfsd_proc_create,
@@ -708,45 +742,55 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_encode = nfssvc_encode_diropres,
.pc_release = nfssvc_release_diropres,
.pc_argsize = sizeof(struct nfsd_createargs),
+ .pc_argzero = sizeof(struct nfsd_createargs),
.pc_ressize = sizeof(struct nfsd_diropres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+FH+AT,
+ .pc_name = "CREATE",
},
[NFSPROC_REMOVE] = {
.pc_func = nfsd_proc_remove,
.pc_decode = nfssvc_decode_diropargs,
- .pc_encode = nfssvc_encode_stat,
+ .pc_encode = nfssvc_encode_statres,
.pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_argzero = sizeof(struct nfsd_diropargs),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
+ .pc_name = "REMOVE",
},
[NFSPROC_RENAME] = {
.pc_func = nfsd_proc_rename,
.pc_decode = nfssvc_decode_renameargs,
- .pc_encode = nfssvc_encode_stat,
+ .pc_encode = nfssvc_encode_statres,
.pc_argsize = sizeof(struct nfsd_renameargs),
+ .pc_argzero = sizeof(struct nfsd_renameargs),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
+ .pc_name = "RENAME",
},
[NFSPROC_LINK] = {
.pc_func = nfsd_proc_link,
.pc_decode = nfssvc_decode_linkargs,
- .pc_encode = nfssvc_encode_stat,
+ .pc_encode = nfssvc_encode_statres,
.pc_argsize = sizeof(struct nfsd_linkargs),
+ .pc_argzero = sizeof(struct nfsd_linkargs),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
+ .pc_name = "LINK",
},
[NFSPROC_SYMLINK] = {
.pc_func = nfsd_proc_symlink,
.pc_decode = nfssvc_decode_symlinkargs,
- .pc_encode = nfssvc_encode_stat,
+ .pc_encode = nfssvc_encode_statres,
.pc_argsize = sizeof(struct nfsd_symlinkargs),
+ .pc_argzero = sizeof(struct nfsd_symlinkargs),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
+ .pc_name = "SYMLINK",
},
[NFSPROC_MKDIR] = {
.pc_func = nfsd_proc_mkdir,
@@ -754,35 +798,43 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_encode = nfssvc_encode_diropres,
.pc_release = nfssvc_release_diropres,
.pc_argsize = sizeof(struct nfsd_createargs),
+ .pc_argzero = sizeof(struct nfsd_createargs),
.pc_ressize = sizeof(struct nfsd_diropres),
.pc_cachetype = RC_REPLBUFF,
.pc_xdrressize = ST+FH+AT,
+ .pc_name = "MKDIR",
},
[NFSPROC_RMDIR] = {
.pc_func = nfsd_proc_rmdir,
.pc_decode = nfssvc_decode_diropargs,
- .pc_encode = nfssvc_encode_stat,
+ .pc_encode = nfssvc_encode_statres,
.pc_argsize = sizeof(struct nfsd_diropargs),
+ .pc_argzero = sizeof(struct nfsd_diropargs),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
+ .pc_name = "RMDIR",
},
[NFSPROC_READDIR] = {
.pc_func = nfsd_proc_readdir,
.pc_decode = nfssvc_decode_readdirargs,
.pc_encode = nfssvc_encode_readdirres,
.pc_argsize = sizeof(struct nfsd_readdirargs),
+ .pc_argzero = sizeof(struct nfsd_readdirargs),
.pc_ressize = sizeof(struct nfsd_readdirres),
.pc_cachetype = RC_NOCACHE,
+ .pc_name = "READDIR",
},
[NFSPROC_STATFS] = {
.pc_func = nfsd_proc_statfs,
- .pc_decode = nfssvc_decode_fhandle,
+ .pc_decode = nfssvc_decode_fhandleargs,
.pc_encode = nfssvc_encode_statfsres,
.pc_argsize = sizeof(struct nfsd_fhandle),
+ .pc_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd_statfsres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+5,
+ .pc_name = "STATFS",
},
};
@@ -796,61 +848,3 @@ const struct svc_version nfsd_version2 = {
.vs_dispatch = nfsd_dispatch,
.vs_xdrsize = NFS2_SVC_XDRSIZE,
};
-
-/*
- * Map errnos to NFS errnos.
- */
-__be32
-nfserrno (int errno)
-{
- static struct {
- __be32 nfserr;
- int syserr;
- } nfs_errtbl[] = {
- { nfs_ok, 0 },
- { nfserr_perm, -EPERM },
- { nfserr_noent, -ENOENT },
- { nfserr_io, -EIO },
- { nfserr_nxio, -ENXIO },
- { nfserr_fbig, -E2BIG },
- { nfserr_acces, -EACCES },
- { nfserr_exist, -EEXIST },
- { nfserr_xdev, -EXDEV },
- { nfserr_mlink, -EMLINK },
- { nfserr_nodev, -ENODEV },
- { nfserr_notdir, -ENOTDIR },
- { nfserr_isdir, -EISDIR },
- { nfserr_inval, -EINVAL },
- { nfserr_fbig, -EFBIG },
- { nfserr_nospc, -ENOSPC },
- { nfserr_rofs, -EROFS },
- { nfserr_mlink, -EMLINK },
- { nfserr_nametoolong, -ENAMETOOLONG },
- { nfserr_notempty, -ENOTEMPTY },
-#ifdef EDQUOT
- { nfserr_dquot, -EDQUOT },
-#endif
- { nfserr_stale, -ESTALE },
- { nfserr_jukebox, -ETIMEDOUT },
- { nfserr_jukebox, -ERESTARTSYS },
- { nfserr_jukebox, -EAGAIN },
- { nfserr_jukebox, -EWOULDBLOCK },
- { nfserr_jukebox, -ENOMEM },
- { nfserr_io, -ETXTBSY },
- { nfserr_notsupp, -EOPNOTSUPP },
- { nfserr_toosmall, -ETOOSMALL },
- { nfserr_serverfault, -ESERVERFAULT },
- { nfserr_serverfault, -ENFILE },
- { nfserr_io, -EUCLEAN },
- { nfserr_perm, -ENOKEY },
- };
- int i;
-
- for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
- if (nfs_errtbl[i].syserr == errno)
- return nfs_errtbl[i].nfserr;
- }
- WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno);
- return nfserr_io;
-}
-
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 2e61a565cdbd..3d4fd40c987b 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/fs_struct.h>
#include <linux/swap.h>
+#include <linux/siphash.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svcsock.h>
@@ -29,13 +30,9 @@
#include "netns.h"
#include "filecache.h"
-#define NFSDDBG_FACILITY NFSDDBG_SVC
+#include "trace.h"
-bool inter_copy_offload_enable;
-EXPORT_SYMBOL_GPL(inter_copy_offload_enable);
-module_param(inter_copy_offload_enable, bool, 0644);
-MODULE_PARM_DESC(inter_copy_offload_enable,
- "Enable inter server to server copy offload. Default: false");
+#define NFSDDBG_FACILITY NFSDDBG_SVC
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
@@ -59,18 +56,17 @@ static __be32 nfsd_init_request(struct svc_rqst *,
struct svc_process_info *);
/*
- * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
- * of the svc_serv struct. In particular, ->sv_nrthreads but also to some
- * extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt
+ * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and some members
+ * of the svc_serv struct such as ->sv_temp_socks and ->sv_permsocks.
*
* If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a
- * properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number
- * of nfsd threads must exist and each must listed in ->sp_all_threads in each
- * entry of ->sv_pools[].
+ * properly initialised 'struct svc_serv' with ->sv_nrthreads > 0 (unless
+ * nn->keep_active is set). That number of nfsd threads must
+ * exist and each must be listed in ->sp_all_threads in some entry of
+ * ->sv_pools[].
*
- * Transitions of the thread count between zero and non-zero are of particular
- * interest since the svc_serv needs to be created and initialized at that
- * point, or freed.
+ * Each active thread holds a counted reference on nn->nfsd_serv, as does
+ * the nn->keep_active flag and various transient calls to svc_get().
*
* Finally, the nfsd_mutex also protects some of the global variables that are
* accessed when nfsd starts and that are settable via the write_* routines in
@@ -88,15 +84,19 @@ DEFINE_MUTEX(nfsd_mutex);
* version 4.1 DRC caches.
* nfsd_drc_pages_used tracks the current version 4.1 DRC memory usage.
*/
-spinlock_t nfsd_drc_lock;
+DEFINE_SPINLOCK(nfsd_drc_lock);
unsigned long nfsd_drc_max_mem;
unsigned long nfsd_drc_mem_used;
#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
static struct svc_stat nfsd_acl_svcstats;
static const struct svc_version *nfsd_acl_version[] = {
+# if defined(CONFIG_NFSD_V2_ACL)
[2] = &nfsd_acl_version2,
+# endif
+# if defined(CONFIG_NFSD_V3_ACL)
[3] = &nfsd_acl_version3,
+# endif
};
#define NFSD_ACL_MINVERS 2
@@ -120,10 +120,10 @@ static struct svc_stat nfsd_acl_svcstats = {
#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
static const struct svc_version *nfsd_version[] = {
+#if defined(CONFIG_NFSD_V2)
[2] = &nfsd_version2,
-#if defined(CONFIG_NFSD_V3)
- [3] = &nfsd_version3,
#endif
+ [3] = &nfsd_version3,
#if defined(CONFIG_NFSD_V4)
[4] = &nfsd_version4,
#endif
@@ -297,13 +297,13 @@ static int nfsd_init_socks(struct net *net, const struct cred *cred)
if (!list_empty(&nn->nfsd_serv->sv_permsocks))
return 0;
- error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
- SVC_SOCK_DEFAULTS, cred);
+ error = svc_xprt_create(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
+ SVC_SOCK_DEFAULTS, cred);
if (error < 0)
return error;
- error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
- SVC_SOCK_DEFAULTS, cred);
+ error = svc_xprt_create(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
+ SVC_SOCK_DEFAULTS, cred);
if (error < 0)
return error;
@@ -312,7 +312,7 @@ static int nfsd_init_socks(struct net *net, const struct cred *cred)
static int nfsd_users = 0;
-static int nfsd_startup_generic(int nrservs)
+static int nfsd_startup_generic(void)
{
int ret;
@@ -349,36 +349,60 @@ static bool nfsd_needs_lockd(struct nfsd_net *nn)
return nfsd_vers(nn, 2, NFSD_TEST) || nfsd_vers(nn, 3, NFSD_TEST);
}
-void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn)
+/**
+ * nfsd_copy_write_verifier - Atomically copy a write verifier
+ * @verf: buffer in which to receive the verifier cookie
+ * @nn: NFS net namespace
+ *
+ * This function provides a wait-free mechanism for copying the
+ * namespace's write verifier without tearing it.
+ */
+void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn)
{
int seq = 0;
do {
- read_seqbegin_or_lock(&nn->boot_lock, &seq);
- /*
- * This is opaque to client, so no need to byte-swap. Use
- * __force to keep sparse happy. y2038 time_t overflow is
- * irrelevant in this usage
- */
- verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
- verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
- } while (need_seqretry(&nn->boot_lock, seq));
- done_seqretry(&nn->boot_lock, seq);
+ read_seqbegin_or_lock(&nn->writeverf_lock, &seq);
+ memcpy(verf, nn->writeverf, sizeof(nn->writeverf));
+ } while (need_seqretry(&nn->writeverf_lock, seq));
+ done_seqretry(&nn->writeverf_lock, seq);
}
-static void nfsd_reset_boot_verifier_locked(struct nfsd_net *nn)
+static void nfsd_reset_write_verifier_locked(struct nfsd_net *nn)
{
- ktime_get_real_ts64(&nn->nfssvc_boot);
+ struct timespec64 now;
+ u64 verf;
+
+ /*
+ * Because the time value is hashed, y2038 time_t overflow
+ * is irrelevant in this usage.
+ */
+ ktime_get_raw_ts64(&now);
+ verf = siphash_2u64(now.tv_sec, now.tv_nsec, &nn->siphash_key);
+ memcpy(nn->writeverf, &verf, sizeof(nn->writeverf));
}
-void nfsd_reset_boot_verifier(struct nfsd_net *nn)
+/**
+ * nfsd_reset_write_verifier - Generate a new write verifier
+ * @nn: NFS net namespace
+ *
+ * This function updates the ->writeverf field of @nn. This field
+ * contains an opaque cookie that, according to Section 18.32.3 of
+ * RFC 8881, "the client can use to determine whether a server has
+ * changed instance state (e.g., server restart) between a call to
+ * WRITE and a subsequent call to either WRITE or COMMIT. This
+ * cookie MUST be unchanged during a single instance of the NFSv4.1
+ * server and MUST be unique between instances of the NFSv4.1
+ * server."
+ */
+void nfsd_reset_write_verifier(struct nfsd_net *nn)
{
- write_seqlock(&nn->boot_lock);
- nfsd_reset_boot_verifier_locked(nn);
- write_sequnlock(&nn->boot_lock);
+ write_seqlock(&nn->writeverf_lock);
+ nfsd_reset_write_verifier_locked(nn);
+ write_sequnlock(&nn->writeverf_lock);
}
-static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cred)
+static int nfsd_startup_net(struct net *net, const struct cred *cred)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int ret;
@@ -386,7 +410,7 @@ static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cre
if (nn->nfsd_net_up)
return 0;
- ret = nfsd_startup_generic(nrservs);
+ ret = nfsd_startup_generic();
if (ret)
return ret;
ret = nfsd_init_socks(net, cred);
@@ -407,6 +431,9 @@ static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cre
if (ret)
goto out_filecache;
+#ifdef CONFIG_NFSD_V4_2_INTER_SSC
+ nfsd4_ssc_init_umount_work(nn);
+#endif
nn->nfsd_net_up = true;
return 0;
@@ -436,6 +463,7 @@ static void nfsd_shutdown_net(struct net *net)
nfsd_shutdown_generic();
}
+static DEFINE_SPINLOCK(nfsd_notifier_lock);
static int nfsd_inetaddr_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
@@ -445,18 +473,17 @@ static int nfsd_inetaddr_event(struct notifier_block *this, unsigned long event,
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
struct sockaddr_in sin;
- if ((event != NETDEV_DOWN) ||
- !atomic_inc_not_zero(&nn->ntf_refcnt))
+ if (event != NETDEV_DOWN || !nn->nfsd_serv)
goto out;
+ spin_lock(&nfsd_notifier_lock);
if (nn->nfsd_serv) {
dprintk("nfsd_inetaddr_event: removed %pI4\n", &ifa->ifa_local);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = ifa->ifa_local;
svc_age_temp_xprts_now(nn->nfsd_serv, (struct sockaddr *)&sin);
}
- atomic_dec(&nn->ntf_refcnt);
- wake_up(&nn->ntf_wq);
+ spin_unlock(&nfsd_notifier_lock);
out:
return NOTIFY_DONE;
@@ -476,10 +503,10 @@ static int nfsd_inet6addr_event(struct notifier_block *this,
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
struct sockaddr_in6 sin6;
- if ((event != NETDEV_DOWN) ||
- !atomic_inc_not_zero(&nn->ntf_refcnt))
+ if (event != NETDEV_DOWN || !nn->nfsd_serv)
goto out;
+ spin_lock(&nfsd_notifier_lock);
if (nn->nfsd_serv) {
dprintk("nfsd_inet6addr_event: removed %pI6\n", &ifa->addr);
sin6.sin6_family = AF_INET6;
@@ -488,8 +515,8 @@ static int nfsd_inet6addr_event(struct notifier_block *this,
sin6.sin6_scope_id = ifa->idev->dev->ifindex;
svc_age_temp_xprts_now(nn->nfsd_serv, (struct sockaddr *)&sin6);
}
- atomic_dec(&nn->ntf_refcnt);
- wake_up(&nn->ntf_wq);
+ spin_unlock(&nfsd_notifier_lock);
+
out:
return NOTIFY_DONE;
}
@@ -502,11 +529,15 @@ static struct notifier_block nfsd_inet6addr_notifier = {
/* Only used under nfsd_mutex, so this atomic may be overkill: */
static atomic_t nfsd_notifier_refcount = ATOMIC_INIT(0);
-static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
+void nfsd_last_thread(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv = nn->nfsd_serv;
+
+ spin_lock(&nfsd_notifier_lock);
+ nn->nfsd_serv = NULL;
+ spin_unlock(&nfsd_notifier_lock);
- atomic_dec(&nn->ntf_refcnt);
/* check if the notifier still has clients */
if (atomic_dec_return(&nfsd_notifier_refcount) == 0) {
unregister_inetaddr_notifier(&nfsd_inetaddr_notifier);
@@ -514,7 +545,8 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
unregister_inet6addr_notifier(&nfsd_inet6addr_notifier);
#endif
}
- wait_event(nn->ntf_wq, atomic_read(&nn->ntf_refcnt) == 0);
+
+ svc_xprt_destroy_all(serv, net);
/*
* write_ports can create the server without actually starting
@@ -567,7 +599,6 @@ static void set_max_drc(void)
nfsd_drc_max_mem = (nr_free_buffer_pages()
>> NFSD_DRC_SIZE_SHIFT) * PAGE_SIZE;
nfsd_drc_mem_used = 0;
- spin_lock_init(&nfsd_drc_lock);
dprintk("%s nfsd_drc_max_mem %lu \n", __func__, nfsd_drc_max_mem);
}
@@ -592,24 +623,6 @@ static int nfsd_get_default_max_blksize(void)
return ret;
}
-static const struct svc_serv_ops nfsd_thread_sv_ops = {
- .svo_shutdown = nfsd_last_thread,
- .svo_function = nfsd,
- .svo_enqueue_xprt = svc_xprt_do_enqueue,
- .svo_setup = svc_set_num_threads,
- .svo_module = THIS_MODULE,
-};
-
-static void nfsd_complete_shutdown(struct net *net)
-{
- struct nfsd_net *nn = net_generic(net, nfsd_net_id);
-
- WARN_ON(!mutex_is_locked(&nfsd_mutex));
-
- nn->nfsd_serv = NULL;
- complete(&nn->nfsd_shutdown_complete);
-}
-
void nfsd_shutdown_threads(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
@@ -624,11 +637,10 @@ void nfsd_shutdown_threads(struct net *net)
svc_get(serv);
/* Kill outstanding nfsd threads */
- serv->sv_ops->svo_setup(serv, NULL, 0);
- nfsd_destroy(net);
+ svc_set_num_threads(serv, NULL, 0);
+ nfsd_last_thread(net);
+ svc_put(serv);
mutex_unlock(&nfsd_mutex);
- /* Wait for shutdown of nfsd_serv to complete */
- wait_for_completion(&nn->nfsd_shutdown_complete);
}
bool i_am_nfsd(void)
@@ -640,6 +652,7 @@ int nfsd_create_serv(struct net *net)
{
int error;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv;
WARN_ON(!mutex_is_locked(&nfsd_mutex));
if (nn->nfsd_serv) {
@@ -649,19 +662,19 @@ int nfsd_create_serv(struct net *net)
if (nfsd_max_blksize == 0)
nfsd_max_blksize = nfsd_get_default_max_blksize();
nfsd_reset_versions(nn);
- nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
- &nfsd_thread_sv_ops);
- if (nn->nfsd_serv == NULL)
+ serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize, nfsd);
+ if (serv == NULL)
return -ENOMEM;
- init_completion(&nn->nfsd_shutdown_complete);
- nn->nfsd_serv->sv_maxconn = nn->max_connections;
- error = svc_bind(nn->nfsd_serv, net);
+ serv->sv_maxconn = nn->max_connections;
+ error = svc_bind(serv, net);
if (error < 0) {
- svc_destroy(nn->nfsd_serv);
- nfsd_complete_shutdown(net);
+ svc_put(serv);
return error;
}
+ spin_lock(&nfsd_notifier_lock);
+ nn->nfsd_serv = serv;
+ spin_unlock(&nfsd_notifier_lock);
set_max_drc();
/* check if the notifier is already set */
@@ -671,8 +684,7 @@ int nfsd_create_serv(struct net *net)
register_inet6addr_notifier(&nfsd_inet6addr_notifier);
#endif
}
- atomic_inc(&nn->ntf_refcnt);
- nfsd_reset_boot_verifier(nn);
+ nfsd_reset_write_verifier(nn);
return 0;
}
@@ -699,18 +711,6 @@ int nfsd_get_nrthreads(int n, int *nthreads, struct net *net)
return 0;
}
-void nfsd_destroy(struct net *net)
-{
- struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- int destroy = (nn->nfsd_serv->sv_nrthreads == 1);
-
- if (destroy)
- svc_shutdown_net(nn->nfsd_serv, net);
- svc_destroy(nn->nfsd_serv);
- if (destroy)
- nfsd_complete_shutdown(net);
-}
-
int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
{
int i = 0;
@@ -735,7 +735,7 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
if (tot > NFSD_MAXSERVS) {
/* total too large: scale down requested numbers */
for (i = 0; i < n && tot > 0; i++) {
- int new = nthreads[i] * NFSD_MAXSERVS / tot;
+ int new = nthreads[i] * NFSD_MAXSERVS / tot;
tot -= (nthreads[i] - new);
nthreads[i] = new;
}
@@ -755,12 +755,13 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
/* apply the new numbers */
svc_get(nn->nfsd_serv);
for (i = 0; i < n; i++) {
- err = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
- &nn->nfsd_serv->sv_pools[i], nthreads[i]);
+ err = svc_set_num_threads(nn->nfsd_serv,
+ &nn->nfsd_serv->sv_pools[i],
+ nthreads[i]);
if (err)
break;
}
- nfsd_destroy(net);
+ svc_put(nn->nfsd_serv);
return err;
}
@@ -775,6 +776,7 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
int error;
bool nfsd_up_before;
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ struct svc_serv *serv;
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
@@ -786,7 +788,7 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
if (nrservs == 0 && nn->nfsd_serv == NULL)
goto out;
- strlcpy(nn->nfsd_name, utsname()->nodename,
+ strscpy(nn->nfsd_name, utsname()->nodename,
sizeof(nn->nfsd_name));
error = nfsd_create_serv(net);
@@ -794,24 +796,25 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
goto out;
nfsd_up_before = nn->nfsd_net_up;
+ serv = nn->nfsd_serv;
- error = nfsd_startup_net(nrservs, net, cred);
+ error = nfsd_startup_net(net, cred);
if (error)
- goto out_destroy;
- error = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
- NULL, nrservs);
+ goto out_put;
+ error = svc_set_num_threads(serv, NULL, nrservs);
if (error)
goto out_shutdown;
- /* We are holding a reference to nn->nfsd_serv which
- * we don't want to count in the return value,
- * so subtract 1
- */
- error = nn->nfsd_serv->sv_nrthreads - 1;
+ error = serv->sv_nrthreads;
+ if (error == 0)
+ nfsd_last_thread(net);
out_shutdown:
if (error < 0 && !nfsd_up_before)
nfsd_shutdown_net(net);
-out_destroy:
- nfsd_destroy(net); /* Release server */
+out_put:
+ /* Threads now hold service active */
+ if (xchg(&nn->keep_active, 0))
+ svc_put(serv);
+ svc_put(serv);
out:
mutex_unlock(&nfsd_mutex);
return error;
@@ -925,9 +928,6 @@ nfsd(void *vrqstp)
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
int err;
- /* Lock module and set up kernel thread */
- mutex_lock(&nfsd_mutex);
-
/* At this point, the thread shares current->fs
* with the init process. We need to create files with the
* umask as defined by the client instead of init's umask. */
@@ -938,17 +938,7 @@ nfsd(void *vrqstp)
current->fs->umask = 0;
- /*
- * thread is spawned with all signals set to SIG_IGN, re-enable
- * the ones that will bring down the thread
- */
- allow_signal(SIGKILL);
- allow_signal(SIGHUP);
- allow_signal(SIGINT);
- allow_signal(SIGQUIT);
-
- nfsdstats.th_cnt++;
- mutex_unlock(&nfsd_mutex);
+ atomic_inc(&nfsdstats.th_cnt);
set_freezable();
@@ -972,57 +962,14 @@ nfsd(void *vrqstp)
validate_process_creds();
}
- /* Clear signals before calling svc_exit_thread() */
- flush_signals(current);
-
- mutex_lock(&nfsd_mutex);
- nfsdstats.th_cnt --;
+ atomic_dec(&nfsdstats.th_cnt);
out:
- rqstp->rq_server = NULL;
-
/* Release the thread */
svc_exit_thread(rqstp);
-
- nfsd_destroy(net);
-
- /* Release module */
- mutex_unlock(&nfsd_mutex);
- module_put_and_exit(0);
return 0;
}
-/*
- * A write procedure can have a large argument, and a read procedure can
- * have a large reply, but no NFSv2 or NFSv3 procedure has argument and
- * reply that can both be larger than a page. The xdr code has taken
- * advantage of this assumption to be a sloppy about bounds checking in
- * some cases. Pending a rewrite of the NFSv2/v3 xdr code to fix that
- * problem, we enforce these assumptions here:
- */
-static bool nfs_request_too_big(struct svc_rqst *rqstp,
- const struct svc_procedure *proc)
-{
- /*
- * The ACL code has more careful bounds-checking and is not
- * susceptible to this problem:
- */
- if (rqstp->rq_prog != NFS_PROGRAM)
- return false;
- /*
- * Ditto NFSv4 (which can in theory have argument and reply both
- * more than a page):
- */
- if (rqstp->rq_vers >= 4)
- return false;
- /* The reply will be small, we're OK: */
- if (proc->pc_xdrressize > 0 &&
- proc->pc_xdrressize < XDR_QUADLEN(PAGE_SIZE))
- return false;
-
- return rqstp->rq_arg.len > PAGE_SIZE;
-}
-
/**
* nfsd_dispatch - Process an NFS or NFSACL Request
* @rqstp: incoming request
@@ -1037,22 +984,15 @@ static bool nfs_request_too_big(struct svc_rqst *rqstp,
int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
{
const struct svc_procedure *proc = rqstp->rq_procinfo;
- struct kvec *argv = &rqstp->rq_arg.head[0];
- struct kvec *resv = &rqstp->rq_res.head[0];
- __be32 *p;
-
- dprintk("nfsd_dispatch: vers %d proc %d\n",
- rqstp->rq_vers, rqstp->rq_proc);
-
- if (nfs_request_too_big(rqstp, proc))
- goto out_too_large;
/*
* Give the xdr decoder a chance to change this if it wants
* (necessary in the NFSv4.0 compound case)
*/
rqstp->rq_cachetype = proc->pc_cachetype;
- if (!proc->pc_decode(rqstp, argv->iov_base))
+
+ svcxdr_init_decode(rqstp);
+ if (!proc->pc_decode(rqstp, &rqstp->rq_arg_stream))
goto out_decode_err;
switch (nfsd_cache_lookup(rqstp)) {
@@ -1068,43 +1008,64 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
* Need to grab the location to store the status, as
* NFSv4 does some encoding while processing
*/
- p = resv->iov_base + resv->iov_len;
- resv->iov_len += sizeof(__be32);
+ svcxdr_init_encode(rqstp);
*statp = proc->pc_func(rqstp);
- if (*statp == rpc_drop_reply || test_bit(RQ_DROPME, &rqstp->rq_flags))
+ if (test_bit(RQ_DROPME, &rqstp->rq_flags))
goto out_update_drop;
- if (!proc->pc_encode(rqstp, p))
+ if (!proc->pc_encode(rqstp, &rqstp->rq_res_stream))
goto out_encode_err;
nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1);
out_cached_reply:
return 1;
-out_too_large:
- dprintk("nfsd: NFSv%d argument too large\n", rqstp->rq_vers);
- *statp = rpc_garbage_args;
- return 1;
-
out_decode_err:
- dprintk("nfsd: failed to decode arguments!\n");
+ trace_nfsd_garbage_args_err(rqstp);
*statp = rpc_garbage_args;
return 1;
out_update_drop:
- dprintk("nfsd: Dropping request; may be revisited later\n");
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
out_dropit:
return 0;
out_encode_err:
- dprintk("nfsd: failed to encode result!\n");
+ trace_nfsd_cant_encode_err(rqstp);
nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
*statp = rpc_system_err;
return 1;
}
+/**
+ * nfssvc_decode_voidarg - Decode void arguments
+ * @rqstp: Server RPC transaction context
+ * @xdr: XDR stream positioned at arguments to decode
+ *
+ * Return values:
+ * %false: Arguments were not valid
+ * %true: Decoding was successful
+ */
+bool nfssvc_decode_voidarg(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
+}
+
+/**
+ * nfssvc_encode_voidres - Encode void results
+ * @rqstp: Server RPC transaction context
+ * @xdr: XDR stream into which to encode results
+ *
+ * Return values:
+ * %false: Local error while encoding
+ * %true: Encoding was successful
+ */
+bool nfssvc_encode_voidres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
+{
+ return true;
+}
+
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
int ret;
@@ -1115,7 +1076,6 @@ int nfsd_pool_stats_open(struct inode *inode, struct file *file)
mutex_unlock(&nfsd_mutex);
return -ENODEV;
}
- /* bump up the psudo refcount while traversing */
svc_get(nn->nfsd_serv);
ret = svc_pool_stats_open(nn->nfsd_serv, file);
mutex_unlock(&nfsd_mutex);
@@ -1124,12 +1084,12 @@ int nfsd_pool_stats_open(struct inode *inode, struct file *file)
int nfsd_pool_stats_release(struct inode *inode, struct file *file)
{
+ struct seq_file *seq = file->private_data;
+ struct svc_serv *serv = seq->private;
int ret = seq_release(inode, file);
- struct net *net = inode->i_sb->s_fs_info;
mutex_lock(&nfsd_mutex);
- /* this function really, really should have been called svc_put() */
- nfsd_destroy(net);
+ svc_put(serv);
mutex_unlock(&nfsd_mutex);
return ret;
}
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 8a288c8fcd57..caf6355b18fa 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -9,12 +9,10 @@
#include "xdr.h"
#include "auth.h"
-#define NFSDDBG_FACILITY NFSDDBG_XDR
-
/*
* Mapping of S_IF* types to NFS file types
*/
-static u32 nfs_ftypes[] = {
+static const u32 nfs_ftypes[] = {
NFNON, NFCHR, NFCHR, NFBAD,
NFDIR, NFBAD, NFBLK, NFBAD,
NFREG, NFBAD, NFLNK, NFBAD,
@@ -23,93 +21,168 @@ static u32 nfs_ftypes[] = {
/*
- * XDR functions for basic NFS types
+ * Basic NFSv2 data types (RFC 1094 Section 2.3)
*/
-static __be32 *
-decode_fh(__be32 *p, struct svc_fh *fhp)
+
+/**
+ * svcxdr_encode_stat - Encode an NFSv2 status code
+ * @xdr: XDR stream
+ * @status: status value to encode
+ *
+ * Return values:
+ * %false: Send buffer space was exhausted
+ * %true: Success
+ */
+bool
+svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status)
{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, sizeof(status));
+ if (!p)
+ return false;
+ *p = status;
+
+ return true;
+}
+
+/**
+ * svcxdr_decode_fhandle - Decode an NFSv2 file handle
+ * @xdr: XDR stream positioned at an encoded NFSv2 FH
+ * @fhp: OUT: filled-in server file handle
+ *
+ * Return values:
+ * %false: The encoded file handle was not valid
+ * %true: @fhp has been initialized
+ */
+bool
+svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp)
+{
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, NFS_FHSIZE);
+ if (!p)
+ return false;
fh_init(fhp, NFS_FHSIZE);
- memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
+ memcpy(&fhp->fh_handle.fh_raw, p, NFS_FHSIZE);
fhp->fh_handle.fh_size = NFS_FHSIZE;
- /* FIXME: Look up export pointer here and verify
- * Sun Secure RPC if requested */
- return p + (NFS_FHSIZE >> 2);
+ return true;
}
-/* Helper function for NFSv2 ACL code */
-__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
+static bool
+svcxdr_encode_fhandle(struct xdr_stream *xdr, const struct svc_fh *fhp)
{
- return decode_fh(p, fhp);
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, NFS_FHSIZE);
+ if (!p)
+ return false;
+ memcpy(p, &fhp->fh_handle.fh_raw, NFS_FHSIZE);
+
+ return true;
}
static __be32 *
-encode_fh(__be32 *p, struct svc_fh *fhp)
+encode_timeval(__be32 *p, const struct timespec64 *time)
{
- memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
- return p + (NFS_FHSIZE>> 2);
+ *p++ = cpu_to_be32((u32)time->tv_sec);
+ if (time->tv_nsec)
+ *p++ = cpu_to_be32(time->tv_nsec / NSEC_PER_USEC);
+ else
+ *p++ = xdr_zero;
+ return p;
}
-/*
- * Decode a file name and make sure that the path contains
- * no slashes or null bytes.
- */
-static __be32 *
-decode_filename(__be32 *p, char **namp, unsigned int *lenp)
+static bool
+svcxdr_decode_filename(struct xdr_stream *xdr, char **name, unsigned int *len)
{
- char *name;
- unsigned int i;
-
- if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
- for (i = 0, name = *namp; i < *lenp; i++, name++) {
- if (*name == '\0' || *name == '/')
- return NULL;
- }
- }
+ u32 size, i;
+ __be32 *p;
+ char *c;
+
+ if (xdr_stream_decode_u32(xdr, &size) < 0)
+ return false;
+ if (size == 0 || size > NFS_MAXNAMLEN)
+ return false;
+ p = xdr_inline_decode(xdr, size);
+ if (!p)
+ return false;
- return p;
+ *len = size;
+ *name = (char *)p;
+ for (i = 0, c = *name; i < size; i++, c++)
+ if (*c == '\0' || *c == '/')
+ return false;
+
+ return true;
}
-static __be32 *
-decode_sattr(__be32 *p, struct iattr *iap, struct user_namespace *userns)
+static bool
+svcxdr_decode_diropargs(struct xdr_stream *xdr, struct svc_fh *fhp,
+ char **name, unsigned int *len)
+{
+ return svcxdr_decode_fhandle(xdr, fhp) &&
+ svcxdr_decode_filename(xdr, name, len);
+}
+
+static bool
+svcxdr_decode_sattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ struct iattr *iap)
{
- u32 tmp, tmp1;
+ u32 tmp1, tmp2;
+ __be32 *p;
+
+ p = xdr_inline_decode(xdr, XDR_UNIT * 8);
+ if (!p)
+ return false;
iap->ia_valid = 0;
- /* Sun client bug compatibility check: some sun clients seem to
- * put 0xffff in the mode field when they mean 0xffffffff.
- * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
+ /*
+ * Some Sun clients put 0xffff in the mode field when they
+ * mean 0xffffffff.
*/
- if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
+ tmp1 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1 && tmp1 != 0xffff) {
iap->ia_valid |= ATTR_MODE;
- iap->ia_mode = tmp;
+ iap->ia_mode = tmp1;
}
- if ((tmp = ntohl(*p++)) != (u32)-1) {
- iap->ia_uid = make_kuid(userns, tmp);
+
+ tmp1 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1) {
+ iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), tmp1);
if (uid_valid(iap->ia_uid))
iap->ia_valid |= ATTR_UID;
}
- if ((tmp = ntohl(*p++)) != (u32)-1) {
- iap->ia_gid = make_kgid(userns, tmp);
+
+ tmp1 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1) {
+ iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), tmp1);
if (gid_valid(iap->ia_gid))
iap->ia_valid |= ATTR_GID;
}
- if ((tmp = ntohl(*p++)) != (u32)-1) {
+
+ tmp1 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1) {
iap->ia_valid |= ATTR_SIZE;
- iap->ia_size = tmp;
+ iap->ia_size = tmp1;
}
- tmp = ntohl(*p++); tmp1 = ntohl(*p++);
- if (tmp != (u32)-1 && tmp1 != (u32)-1) {
+
+ tmp1 = be32_to_cpup(p++);
+ tmp2 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1 && tmp2 != (u32)-1) {
iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
- iap->ia_atime.tv_sec = tmp;
- iap->ia_atime.tv_nsec = tmp1 * 1000;
+ iap->ia_atime.tv_sec = tmp1;
+ iap->ia_atime.tv_nsec = tmp2 * NSEC_PER_USEC;
}
- tmp = ntohl(*p++); tmp1 = ntohl(*p++);
- if (tmp != (u32)-1 && tmp1 != (u32)-1) {
+
+ tmp1 = be32_to_cpup(p++);
+ tmp2 = be32_to_cpup(p++);
+ if (tmp1 != (u32)-1 && tmp2 != (u32)-1) {
iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
- iap->ia_mtime.tv_sec = tmp;
- iap->ia_mtime.tv_nsec = tmp1 * 1000;
+ iap->ia_mtime.tv_sec = tmp1;
+ iap->ia_mtime.tv_nsec = tmp2 * NSEC_PER_USEC;
/*
* Passing the invalid value useconds=1000000 for mtime
* is a Sun convention for "set both mtime and atime to
@@ -119,476 +192,447 @@ decode_sattr(__be32 *p, struct iattr *iap, struct user_namespace *userns)
* sattr in section 6.1 of "NFS Illustrated" by
* Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
*/
- if (tmp1 == 1000000)
+ if (tmp2 == 1000000)
iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
}
- return p;
+
+ return true;
}
-static __be32 *
-encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
- struct kstat *stat)
+/**
+ * svcxdr_encode_fattr - Encode NFSv2 file attributes
+ * @rqstp: Context of a completed RPC transaction
+ * @xdr: XDR stream
+ * @fhp: File handle to encode
+ * @stat: Attributes to encode
+ *
+ * Return values:
+ * %false: Send buffer space was exhausted
+ * %true: Success
+ */
+bool
+svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp, const struct kstat *stat)
{
struct user_namespace *userns = nfsd_user_namespace(rqstp);
- struct dentry *dentry = fhp->fh_dentry;
- int type;
+ struct dentry *dentry = fhp->fh_dentry;
+ int type = stat->mode & S_IFMT;
struct timespec64 time;
- u32 f;
+ __be32 *p;
+ u32 fsid;
- type = (stat->mode & S_IFMT);
+ p = xdr_reserve_space(xdr, XDR_UNIT * 17);
+ if (!p)
+ return false;
- *p++ = htonl(nfs_ftypes[type >> 12]);
- *p++ = htonl((u32) stat->mode);
- *p++ = htonl((u32) stat->nlink);
- *p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
- *p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
+ *p++ = cpu_to_be32(nfs_ftypes[type >> 12]);
+ *p++ = cpu_to_be32((u32)stat->mode);
+ *p++ = cpu_to_be32((u32)stat->nlink);
+ *p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
+ *p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
- if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
- *p++ = htonl(NFS_MAXPATHLEN);
- } else {
- *p++ = htonl((u32) stat->size);
- }
- *p++ = htonl((u32) stat->blksize);
+ if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN)
+ *p++ = cpu_to_be32(NFS_MAXPATHLEN);
+ else
+ *p++ = cpu_to_be32((u32) stat->size);
+ *p++ = cpu_to_be32((u32) stat->blksize);
if (S_ISCHR(type) || S_ISBLK(type))
- *p++ = htonl(new_encode_dev(stat->rdev));
+ *p++ = cpu_to_be32(new_encode_dev(stat->rdev));
else
- *p++ = htonl(0xffffffff);
- *p++ = htonl((u32) stat->blocks);
+ *p++ = cpu_to_be32(0xffffffff);
+ *p++ = cpu_to_be32((u32)stat->blocks);
+
switch (fsid_source(fhp)) {
- default:
- case FSIDSOURCE_DEV:
- *p++ = htonl(new_encode_dev(stat->dev));
- break;
case FSIDSOURCE_FSID:
- *p++ = htonl((u32) fhp->fh_export->ex_fsid);
+ fsid = (u32)fhp->fh_export->ex_fsid;
break;
case FSIDSOURCE_UUID:
- f = ((u32*)fhp->fh_export->ex_uuid)[0];
- f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
- f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
- f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
- *p++ = htonl(f);
+ fsid = ((u32 *)fhp->fh_export->ex_uuid)[0];
+ fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[1];
+ fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[2];
+ fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[3];
+ break;
+ default:
+ fsid = new_encode_dev(stat->dev);
break;
}
- *p++ = htonl((u32) stat->ino);
- *p++ = htonl((u32) stat->atime.tv_sec);
- *p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
+ *p++ = cpu_to_be32(fsid);
+
+ *p++ = cpu_to_be32((u32)stat->ino);
+ p = encode_timeval(p, &stat->atime);
time = stat->mtime;
- lease_get_mtime(d_inode(dentry), &time);
- *p++ = htonl((u32) time.tv_sec);
- *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
- *p++ = htonl((u32) stat->ctime.tv_sec);
- *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
+ lease_get_mtime(d_inode(dentry), &time);
+ p = encode_timeval(p, &time);
+ encode_timeval(p, &stat->ctime);
- return p;
-}
-
-/* Helper function for NFSv2 ACL code */
-__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, struct kstat *stat)
-{
- return encode_fattr(rqstp, p, fhp, stat);
+ return true;
}
/*
* XDR decode functions
*/
-int
-nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_argsize_check(rqstp, p);
-}
-int
-nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_fhandle *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_fhandle(xdr, &args->fh);
}
-int
-nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_sattrargs *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_fhandle(xdr, &args->fh) &&
+ svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
-nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_diropargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs(xdr, &args->fh, &args->name, &args->len);
}
-int
-nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readargs *args = rqstp->rq_argp;
- unsigned int len;
- int v;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
-
- args->offset = ntohl(*p++);
- len = args->count = ntohl(*p++);
- p++; /* totalcount - unused */
-
- len = min_t(unsigned int, len, NFSSVC_MAXBLKSIZE_V2);
-
- /* set up somewhere to store response.
- * We take pages, put them on reslist and include in iovec
- */
- v=0;
- while (len > 0) {
- struct page *p = *(rqstp->rq_next_page++);
-
- rqstp->rq_vec[v].iov_base = page_address(p);
- rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
- len -= rqstp->rq_vec[v].iov_len;
- v++;
- }
- args->vlen = v;
- return xdr_argsize_check(rqstp, p);
+ u32 totalcount;
+
+ if (!svcxdr_decode_fhandle(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
+ /* totalcount is ignored */
+ if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
+ return false;
+
+ return true;
}
-int
-nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_writeargs *args = rqstp->rq_argp;
- unsigned int len, hdr, dlen;
- struct kvec *head = rqstp->rq_arg.head;
-
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
-
- p++; /* beginoffset */
- args->offset = ntohl(*p++); /* offset */
- p++; /* totalcount */
- len = args->len = ntohl(*p++);
- /*
- * The protocol specifies a maximum of 8192 bytes.
- */
- if (len > NFSSVC_MAXBLKSIZE_V2)
- return 0;
-
- /*
- * Check to make sure that we got the right number of
- * bytes.
- */
- hdr = (void*)p - head->iov_base;
- if (hdr > head->iov_len)
- return 0;
- dlen = head->iov_len + rqstp->rq_arg.page_len - hdr;
-
- /*
- * Round the length of the data which was specified up to
- * the next multiple of XDR units and then compare that
- * against the length which was actually received.
- * Note that when RPCSEC/GSS (for example) is used, the
- * data buffer can be padded so dlen might be larger
- * than required. It must never be smaller.
- */
- if (dlen < XDR_QUADLEN(len)*4)
- return 0;
-
- args->first.iov_base = (void *)p;
- args->first.iov_len = head->iov_len - hdr;
- return 1;
+ u32 beginoffset, totalcount;
+
+ if (!svcxdr_decode_fhandle(xdr, &args->fh))
+ return false;
+ /* beginoffset is ignored */
+ if (xdr_stream_decode_u32(xdr, &beginoffset) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
+ return false;
+ /* totalcount is ignored */
+ if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
+ return false;
+
+ /* opaque data */
+ if (xdr_stream_decode_u32(xdr, &args->len) < 0)
+ return false;
+ if (args->len > NFSSVC_MAXBLKSIZE_V2)
+ return false;
+
+ return xdr_stream_subsegment(xdr, &args->payload, args->len);
}
-int
-nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_createargs *args = rqstp->rq_argp;
- if ( !(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len)))
- return 0;
- p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs(xdr, &args->fh,
+ &args->name, &args->len) &&
+ svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
-nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_renameargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_filename(p, &args->fname, &args->flen))
- || !(p = decode_fh(p, &args->tfh))
- || !(p = decode_filename(p, &args->tname, &args->tlen)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
-}
-
-int
-nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p)
-{
- struct nfsd_readlinkargs *args = rqstp->rq_argp;
-
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->buffer = page_address(*(rqstp->rq_next_page++));
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_diropargs(xdr, &args->ffh,
+ &args->fname, &args->flen) &&
+ svcxdr_decode_diropargs(xdr, &args->tfh,
+ &args->tname, &args->tlen);
}
-int
-nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_linkargs *args = rqstp->rq_argp;
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_fh(p, &args->tfh))
- || !(p = decode_filename(p, &args->tname, &args->tlen)))
- return 0;
-
- return xdr_argsize_check(rqstp, p);
+ return svcxdr_decode_fhandle(xdr, &args->ffh) &&
+ svcxdr_decode_diropargs(xdr, &args->tfh,
+ &args->tname, &args->tlen);
}
-int
-nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_symlinkargs *args = rqstp->rq_argp;
- char *base = (char *)p;
- size_t xdrlen;
-
- if ( !(p = decode_fh(p, &args->ffh))
- || !(p = decode_filename(p, &args->fname, &args->flen)))
- return 0;
+ struct kvec *head = rqstp->rq_arg.head;
- args->tlen = ntohl(*p++);
+ if (!svcxdr_decode_diropargs(xdr, &args->ffh, &args->fname, &args->flen))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
+ return false;
if (args->tlen == 0)
- return 0;
-
- args->first.iov_base = p;
- args->first.iov_len = rqstp->rq_arg.head[0].iov_len;
- args->first.iov_len -= (char *)p - base;
+ return false;
- /* This request is never larger than a page. Therefore,
- * transport will deliver either:
- * 1. pathname in the pagelist -> sattr is in the tail.
- * 2. everything in the head buffer -> sattr is in the head.
- */
- if (rqstp->rq_arg.page_len) {
- if (args->tlen != rqstp->rq_arg.page_len)
- return 0;
- p = rqstp->rq_arg.tail[0].iov_base;
- } else {
- xdrlen = XDR_QUADLEN(args->tlen);
- if (xdrlen > args->first.iov_len - (8 * sizeof(__be32)))
- return 0;
- p += xdrlen;
- }
- decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
-
- return 1;
+ args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
+ args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
+ if (!args->first.iov_base)
+ return false;
+ return svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
}
-int
-nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readdirargs *args = rqstp->rq_argp;
- p = decode_fh(p, &args->fh);
- if (!p)
- return 0;
- args->cookie = ntohl(*p++);
- args->count = ntohl(*p++);
- args->count = min_t(u32, args->count, PAGE_SIZE);
- args->buffer = page_address(*(rqstp->rq_next_page++));
+ if (!svcxdr_decode_fhandle(xdr, &args->fh))
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->cookie) < 0)
+ return false;
+ if (xdr_stream_decode_u32(xdr, &args->count) < 0)
+ return false;
- return xdr_argsize_check(rqstp, p);
+ return true;
}
/*
* XDR encode functions
*/
-int
-nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p)
-{
- return xdr_ressize_check(rqstp, p);
-}
-int
-nfssvc_encode_stat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_stat *resp = rqstp->rq_resp;
- *p++ = resp->status;
- return xdr_ressize_check(rqstp, p);
+ return svcxdr_encode_stat(xdr, resp->status);
}
-int
-nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_attrstat *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- goto out;
- p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
-out:
- return xdr_ressize_check(rqstp, p);
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ break;
+ }
+
+ return true;
}
-int
-nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_diropres *resp = rqstp->rq_resp;
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- goto out;
- p = encode_fh(p, &resp->fh);
- p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
-out:
- return xdr_ressize_check(rqstp, p);
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_fhandle(xdr, &resp->fh))
+ return false;
+ if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ break;
+ }
+
+ return true;
}
-int
-nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readlinkres *resp = rqstp->rq_resp;
-
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- return xdr_ressize_check(rqstp, p);
-
- *p++ = htonl(resp->len);
- xdr_ressize_check(rqstp, p);
- rqstp->rq_res.page_len = resp->len;
- if (resp->len & 3) {
- /* need to pad the tail */
- rqstp->rq_res.tail[0].iov_base = p;
- *p = 0;
- rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
+ struct kvec *head = rqstp->rq_res.head;
+
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (xdr_stream_encode_u32(xdr, resp->len) < 0)
+ return false;
+ xdr_write_pages(xdr, &resp->page, 0, resp->len);
+ if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
+ return false;
+ break;
}
- return 1;
+
+ return true;
}
-int
-nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readres *resp = rqstp->rq_resp;
-
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- return xdr_ressize_check(rqstp, p);
-
- p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
- *p++ = htonl(resp->count);
- xdr_ressize_check(rqstp, p);
-
- /* now update rqstp->rq_res to reflect data as well */
- rqstp->rq_res.page_len = resp->count;
- if (resp->count & 3) {
- /* need to pad the tail */
- rqstp->rq_res.tail[0].iov_base = p;
- *p = 0;
- rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
+ struct kvec *head = rqstp->rq_res.head;
+
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
+ return false;
+ if (xdr_stream_encode_u32(xdr, resp->count) < 0)
+ return false;
+ xdr_write_pages(xdr, resp->pages, rqstp->rq_res.page_base,
+ resp->count);
+ if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
+ return false;
+ break;
}
- return 1;
+
+ return true;
}
-int
-nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_readdirres *resp = rqstp->rq_resp;
+ struct xdr_buf *dirlist = &resp->dirlist;
+
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ xdr_write_pages(xdr, dirlist->pages, 0, dirlist->len);
+ /* no more entries */
+ if (xdr_stream_encode_item_absent(xdr) < 0)
+ return false;
+ if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
+ return false;
+ break;
+ }
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- return xdr_ressize_check(rqstp, p);
-
- xdr_ressize_check(rqstp, p);
- p = resp->buffer;
- *p++ = 0; /* no more entries */
- *p++ = htonl((resp->common.err == nfserr_eof));
- rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
-
- return 1;
+ return true;
}
-int
-nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p)
+bool
+nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
{
struct nfsd_statfsres *resp = rqstp->rq_resp;
struct kstatfs *stat = &resp->stats;
+ __be32 *p;
+
+ if (!svcxdr_encode_stat(xdr, resp->status))
+ return false;
+ switch (resp->status) {
+ case nfs_ok:
+ p = xdr_reserve_space(xdr, XDR_UNIT * 5);
+ if (!p)
+ return false;
+ *p++ = cpu_to_be32(NFSSVC_MAXBLKSIZE_V2);
+ *p++ = cpu_to_be32(stat->f_bsize);
+ *p++ = cpu_to_be32(stat->f_blocks);
+ *p++ = cpu_to_be32(stat->f_bfree);
+ *p = cpu_to_be32(stat->f_bavail);
+ break;
+ }
- *p++ = resp->status;
- if (resp->status != nfs_ok)
- return xdr_ressize_check(rqstp, p);
+ return true;
+}
- *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
- *p++ = htonl(stat->f_bsize);
- *p++ = htonl(stat->f_blocks);
- *p++ = htonl(stat->f_bfree);
- *p++ = htonl(stat->f_bavail);
- return xdr_ressize_check(rqstp, p);
+/**
+ * nfssvc_encode_nfscookie - Encode a directory offset cookie
+ * @resp: readdir result context
+ * @offset: offset cookie to encode
+ *
+ * The buffer space for the offset cookie has already been reserved
+ * by svcxdr_encode_entry_common().
+ */
+void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset)
+{
+ __be32 cookie = cpu_to_be32(offset);
+
+ if (!resp->cookie_offset)
+ return;
+
+ write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
+ sizeof(cookie));
+ resp->cookie_offset = 0;
}
-int
-nfssvc_encode_entry(void *ccdv, const char *name,
- int namlen, loff_t offset, u64 ino, unsigned int d_type)
+static bool
+svcxdr_encode_entry_common(struct nfsd_readdirres *resp, const char *name,
+ int namlen, loff_t offset, u64 ino)
{
- struct readdir_cd *ccd = ccdv;
- struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
- __be32 *p = cd->buffer;
- int buflen, slen;
+ struct xdr_buf *dirlist = &resp->dirlist;
+ struct xdr_stream *xdr = &resp->xdr;
+
+ if (xdr_stream_encode_item_present(xdr) < 0)
+ return false;
+ /* fileid */
+ if (xdr_stream_encode_u32(xdr, (u32)ino) < 0)
+ return false;
+ /* name */
+ if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS2_MAXNAMLEN)) < 0)
+ return false;
+ /* cookie */
+ resp->cookie_offset = dirlist->len;
+ if (xdr_stream_encode_u32(xdr, ~0U) < 0)
+ return false;
+
+ return true;
+}
- /*
- dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
- namlen, name, offset, ino);
- */
+/**
+ * nfssvc_encode_entry - encode one NFSv2 READDIR entry
+ * @data: directory context
+ * @name: name of the object to be encoded
+ * @namlen: length of that name, in bytes
+ * @offset: the offset of the previous entry
+ * @ino: the fileid of this entry
+ * @d_type: unused
+ *
+ * Return values:
+ * %0: Entry was successfully encoded.
+ * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
+ *
+ * On exit, the following fields are updated:
+ * - resp->xdr
+ * - resp->common.err
+ * - resp->cookie_offset
+ */
+int nfssvc_encode_entry(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct readdir_cd *ccd = data;
+ struct nfsd_readdirres *resp = container_of(ccd,
+ struct nfsd_readdirres,
+ common);
+ unsigned int starting_length = resp->dirlist.len;
- if (offset > ~((u32) 0)) {
- cd->common.err = nfserr_fbig;
- return -EINVAL;
- }
- if (cd->offset)
- *cd->offset = htonl(offset);
+ /* The offset cookie for the previous entry */
+ nfssvc_encode_nfscookie(resp, offset);
- /* truncate filename */
- namlen = min(namlen, NFS2_MAXNAMLEN);
- slen = XDR_QUADLEN(namlen);
+ if (!svcxdr_encode_entry_common(resp, name, namlen, offset, ino))
+ goto out_toosmall;
- if ((buflen = cd->buflen - slen - 4) < 0) {
- cd->common.err = nfserr_toosmall;
- return -EINVAL;
- }
- if (ino > ~((u32) 0)) {
- cd->common.err = nfserr_fbig;
- return -EINVAL;
- }
- *p++ = xdr_one; /* mark entry present */
- *p++ = htonl((u32) ino); /* file id */
- p = xdr_encode_array(p, name, namlen);/* name length & name */
- cd->offset = p; /* remember pointer */
- *p++ = htonl(~0U); /* offset of next entry */
-
- cd->buflen = buflen;
- cd->buffer = p;
- cd->common.err = nfs_ok;
+ xdr_commit_encode(&resp->xdr);
+ resp->common.err = nfs_ok;
return 0;
+
+out_toosmall:
+ resp->cookie_offset = 0;
+ resp->common.err = nfserr_toosmall;
+ resp->dirlist.len = starting_length;
+ return -EINVAL;
}
/*
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 9eae11a9d21c..e94634d30591 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -57,11 +57,11 @@ typedef struct {
} stateid_t;
typedef struct {
- stateid_t stid;
+ stateid_t cs_stid;
#define NFS4_COPY_STID 1
#define NFS4_COPYNOTIFY_STID 2
- unsigned char sc_type;
- refcount_t sc_count;
+ unsigned char cs_type;
+ refcount_t cs_count;
} copy_stateid_t;
struct nfsd4_callback {
@@ -149,6 +149,7 @@ struct nfs4_delegation {
/* For recall: */
int dl_retries;
struct nfsd4_callback dl_recall;
+ bool dl_recalled;
};
#define cb_to_delegation(cb) \
@@ -174,7 +175,7 @@ static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
/* Maximum number of slots per session. 160 is useful for long haul TCP */
#define NFSD_MAX_SLOTS_PER_SESSION 160
/* Maximum number of operations per session compound */
-#define NFSD_MAX_OPS_PER_COMPOUND 16
+#define NFSD_MAX_OPS_PER_COMPOUND 50
/* Maximum session per slot cache size */
#define NFSD_SLOT_CACHE_SIZE 2048
/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
@@ -282,6 +283,28 @@ struct nfsd4_sessionid {
#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
+/*
+ * State Meaning Where set
+ * --------------------------------------------------------------------------
+ * | NFSD4_ACTIVE | Confirmed, active | Default |
+ * |------------------- ----------------------------------------------------|
+ * | NFSD4_COURTESY | Courtesy state. | nfs4_get_client_reaplist |
+ * | | Lease/lock/share | |
+ * | | reservation conflict | |
+ * | | can cause Courtesy | |
+ * | | client to be expired | |
+ * |------------------------------------------------------------------------|
+ * | NFSD4_EXPIRABLE | Courtesy client to be| nfs4_laundromat |
+ * | | expired by Laundromat| try_to_expire_client |
+ * | | due to conflict | |
+ * |------------------------------------------------------------------------|
+ */
+enum {
+ NFSD4_ACTIVE = 0,
+ NFSD4_COURTESY,
+ NFSD4_EXPIRABLE,
+};
+
/*
* struct nfs4_client - one per client. Clientids live here.
*
@@ -345,6 +368,7 @@ struct nfs4_client {
#define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
1 << NFSD4_CLIENT_CB_KILL)
+#define NFSD4_CLIENT_CB_RECALL_ANY (6)
unsigned long cl_flags;
const struct cred *cl_cb_cred;
struct rpc_clnt *cl_cb_client;
@@ -371,6 +395,10 @@ struct nfs4_client {
/* debugging info directory under nfsd/clients/ : */
struct dentry *cl_nfsd_dentry;
+ /* 'info' file within that directory. Ref is not counted,
+ * but will remain valid iff cl_nfsd_dentry != NULL
+ */
+ struct dentry *cl_nfsd_info_dentry;
/* for nfs41 callbacks */
/* We currently support a single back channel with a single slot */
@@ -381,6 +409,13 @@ struct nfs4_client {
struct list_head async_copies; /* list of async copies */
spinlock_t async_lock; /* lock for async copies */
atomic_t cl_cb_inflight; /* Outstanding callbacks */
+
+ unsigned int cl_state;
+ atomic_t cl_delegs_in_recall;
+
+ struct nfsd4_cb_recall_any *cl_ra;
+ time64_t cl_ra_time;
+ struct list_head cl_ra_cblist;
};
/* struct nfs4_client_reset
@@ -506,14 +541,13 @@ struct nfs4_clnt_odstate {
* inode can have multiple filehandles associated with it, so there is
* (potentially) a many to one relationship between this struct and struct
* inode.
- *
- * These are hashed by filehandle in the file_hashtbl, which is protected by
- * the global state_lock spinlock.
*/
struct nfs4_file {
refcount_t fi_ref;
+ struct inode * fi_inode;
+ bool fi_aliased;
spinlock_t fi_lock;
- struct hlist_node fi_hash; /* hash on fi_fhandle */
+ struct rhlist_head fi_rlist;
struct list_head fi_stateids;
union {
struct list_head fi_delegations;
@@ -562,6 +596,10 @@ struct nfs4_ol_stateid {
struct list_head st_locks;
struct nfs4_stateowner *st_stateowner;
struct nfs4_clnt_odstate *st_clnt_odstate;
+/*
+ * These bitmasks use 3 separate bits for READ, ALLOW, and BOTH; see the
+ * comment above bmap_to_share_mode() for explanation:
+ */
unsigned char st_access_bmap;
unsigned char st_deny_bmap;
struct nfs4_ol_stateid *st_openstp;
@@ -603,6 +641,7 @@ enum nfsd4_cb_op {
NFSPROC4_CLNT_CB_OFFLOAD,
NFSPROC4_CLNT_CB_SEQUENCE,
NFSPROC4_CLNT_CB_NOTIFY_LOCK,
+ NFSPROC4_CLNT_CB_RECALL_ANY,
};
/* Returns true iff a is later than b: */
@@ -623,6 +662,7 @@ struct nfsd4_blocked_lock {
struct file_lock nbl_lock;
struct knfsd_fh nbl_fh;
struct nfsd4_callback nbl_cb;
+ struct kref nbl_kref;
};
struct nfsd4_compound_state;
@@ -649,26 +689,22 @@ void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *)
extern void nfs4_release_reclaim(struct nfsd_net *);
extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
struct nfsd_net *nn);
-extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
- struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
+extern __be32 nfs4_check_open_reclaim(struct nfs4_client *);
extern void nfsd4_probe_callback(struct nfs4_client *clp);
extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
-extern void nfsd4_run_cb(struct nfsd4_callback *cb);
+extern bool nfsd4_run_cb(struct nfsd4_callback *cb);
extern int nfsd4_create_callback_queue(void);
extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);
extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
-extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
struct xdr_netobj princhash, struct nfsd_net *nn);
extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
-struct nfs4_file *find_file(struct knfsd_fh *fh);
void put_nfs4_file(struct nfs4_file *fi);
-extern void nfs4_put_copy(struct nfsd4_copy *copy);
extern struct nfsd4_copy *
find_async_copy(struct nfs4_client *clp, stateid_t *staetid);
extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
@@ -693,4 +729,9 @@ extern void nfsd4_client_record_remove(struct nfs4_client *clp);
extern int nfsd4_client_record_check(struct nfs4_client *clp);
extern void nfsd4_record_grace_done(struct nfsd_net *nn);
+static inline bool try_to_expire_client(struct nfs4_client *clp)
+{
+ cmpxchg(&clp->cl_state, NFSD4_COURTESY, NFSD4_EXPIRABLE);
+ return clp->cl_state == NFSD4_EXPIRABLE;
+}
#endif /* NFSD4_STATE_H */
diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index b1bc582b0493..777e24e5da33 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -7,16 +7,14 @@
* Format:
* rc <hits> <misses> <nocache>
* Statistsics for the reply cache
- * fh <stale> <total-lookups> <anonlookups> <dir-not-in-dcache> <nondir-not-in-dcache>
+ * fh <stale> <deprecated filehandle cache stats>
* statistics for filehandle lookup
* io <bytes-read> <bytes-written>
* statistics for IO throughput
- * th <threads> <fullcnt> <10%-20%> <20%-30%> ... <90%-100%> <100%>
- * time (seconds) when nfsd thread usage above thresholds
- * and number of times that all threads were in use
- * ra cache-size <10% <20% <30% ... <100% not-found
- * number of times that read-ahead entry was found that deep in
- * the cache.
+ * th <threads> <deprecated thread usage histogram stats>
+ * number of threads
+ * ra <deprecated ra-cache stats>
+ *
* plus generic RPC stats (see net/sunrpc/stats.c)
*
* Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@...ad.swb.de>
@@ -34,35 +32,28 @@ struct svc_stat nfsd_svcstats = {
.program = &nfsd_program,
};
-static int nfsd_proc_show(struct seq_file *seq, void *v)
+static int nfsd_show(struct seq_file *seq, void *v)
{
int i;
- seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
- nfsdstats.rchits,
- nfsdstats.rcmisses,
- nfsdstats.rcnocache,
- nfsdstats.fh_stale,
- nfsdstats.fh_lookup,
- nfsdstats.fh_anon,
- nfsdstats.fh_nocache_dir,
- nfsdstats.fh_nocache_nondir,
- nfsdstats.io_read,
- nfsdstats.io_write);
+ seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n",
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_HITS]),
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_MISSES]),
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]),
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_FH_STALE]),
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_READ]),
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_IO_WRITE]));
+
/* thread usage: */
- seq_printf(seq, "th %u %u", nfsdstats.th_cnt, nfsdstats.th_fullcnt);
- for (i=0; i<10; i++) {
- unsigned int jifs = nfsdstats.th_usage[i];
- unsigned int sec = jifs / HZ, msec = (jifs % HZ)*1000/HZ;
- seq_printf(seq, " %u.%03u", sec, msec);
- }
+ seq_printf(seq, "th %u 0", atomic_read(&nfsdstats.th_cnt));
+
+ /* deprecated thread usage histogram stats */
+ for (i = 0; i < 10; i++)
+ seq_puts(seq, " 0.000");
+
+ /* deprecated ra-cache stats */
+ seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n");
- /* newline and ra-cache */
- seq_printf(seq, "\nra %u", nfsdstats.ra_size);
- for (i=0; i<11; i++)
- seq_printf(seq, " %u", nfsdstats.ra_depth[i]);
- seq_putc(seq, '\n');
-
/* show my rpc info */
svc_seq_show(seq, &nfsd_svcstats);
@@ -70,8 +61,10 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
/* Show count for individual nfsv4 operations */
/* Writing operation numbers 0 1 2 also for maintaining uniformity */
seq_printf(seq,"proc4ops %u", LAST_NFS4_OP + 1);
- for (i = 0; i <= LAST_NFS4_OP; i++)
- seq_printf(seq, " %u", nfsdstats.nfs4_opcount[i]);
+ for (i = 0; i <= LAST_NFS4_OP; i++) {
+ seq_printf(seq, " %lld",
+ percpu_counter_sum_positive(&nfsdstats.counter[NFSD_STATS_NFS4_OP(i)]));
+ }
seq_putc(seq, '\n');
#endif
@@ -79,26 +72,65 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
return 0;
}
-static int nfsd_proc_open(struct inode *inode, struct file *file)
+DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
+
+int nfsd_percpu_counters_init(struct percpu_counter counters[], int num)
{
- return single_open(file, nfsd_proc_show, NULL);
+ int i, err = 0;
+
+ for (i = 0; !err && i < num; i++)
+ err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
+
+ if (!err)
+ return 0;
+
+ for (; i > 0; i--)
+ percpu_counter_destroy(&counters[i-1]);
+
+ return err;
}
-static const struct proc_ops nfsd_proc_ops = {
- .proc_open = nfsd_proc_open,
- .proc_read = seq_read,
- .proc_lseek = seq_lseek,
- .proc_release = single_release,
-};
+void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++)
+ percpu_counter_set(&counters[i], 0);
+}
+
+void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++)
+ percpu_counter_destroy(&counters[i]);
+}
+
+static int nfsd_stat_counters_init(void)
+{
+ return nfsd_percpu_counters_init(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
+}
+
+static void nfsd_stat_counters_destroy(void)
+{
+ nfsd_percpu_counters_destroy(nfsdstats.counter, NFSD_STATS_COUNTERS_NUM);
+}
-void
-nfsd_stat_init(void)
+int nfsd_stat_init(void)
{
+ int err;
+
+ err = nfsd_stat_counters_init();
+ if (err)
+ return err;
+
svc_proc_register(&init_net, &nfsd_svcstats, &nfsd_proc_ops);
+
+ return 0;
}
-void
-nfsd_stat_shutdown(void)
+void nfsd_stat_shutdown(void)
{
+ nfsd_stat_counters_destroy();
svc_proc_unregister(&init_net, "nfsd");
}
diff --git a/fs/nfsd/stats.h b/fs/nfsd/stats.h
index b23fdac69820..9b43dc3d9991 100644
--- a/fs/nfsd/stats.h
+++ b/fs/nfsd/stats.h
@@ -8,37 +8,89 @@
#define _NFSD_STATS_H
#include <uapi/linux/nfsd/stats.h>
+#include <linux/percpu_counter.h>
-struct nfsd_stats {
- unsigned int rchits; /* repcache hits */
- unsigned int rcmisses; /* repcache hits */
- unsigned int rcnocache; /* uncached reqs */
- unsigned int fh_stale; /* FH stale error */
- unsigned int fh_lookup; /* dentry cached */
- unsigned int fh_anon; /* anon file dentry returned */
- unsigned int fh_nocache_dir; /* filehandle not found in dcache */
- unsigned int fh_nocache_nondir; /* filehandle not found in dcache */
- unsigned int io_read; /* bytes returned to read requests */
- unsigned int io_write; /* bytes passed in write requests */
- unsigned int th_cnt; /* number of available threads */
- unsigned int th_usage[10]; /* number of ticks during which n perdeciles
- * of available threads were in use */
- unsigned int th_fullcnt; /* number of times last free thread was used */
- unsigned int ra_size; /* size of ra cache */
- unsigned int ra_depth[11]; /* number of times ra entry was found that deep
- * in the cache (10percentiles). [10] = not found */
+enum {
+ NFSD_STATS_RC_HITS, /* repcache hits */
+ NFSD_STATS_RC_MISSES, /* repcache misses */
+ NFSD_STATS_RC_NOCACHE, /* uncached reqs */
+ NFSD_STATS_FH_STALE, /* FH stale error */
+ NFSD_STATS_IO_READ, /* bytes returned to read requests */
+ NFSD_STATS_IO_WRITE, /* bytes passed in write requests */
#ifdef CONFIG_NFSD_V4
- unsigned int nfs4_opcount[LAST_NFS4_OP + 1]; /* count of individual nfsv4 operations */
+ NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
+ NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP,
+#define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
#endif
-
+ NFSD_STATS_COUNTERS_NUM
};
+struct nfsd_stats {
+ struct percpu_counter counter[NFSD_STATS_COUNTERS_NUM];
+
+ atomic_t th_cnt; /* number of available threads */
+};
extern struct nfsd_stats nfsdstats;
+
extern struct svc_stat nfsd_svcstats;
-void nfsd_stat_init(void);
-void nfsd_stat_shutdown(void);
+int nfsd_percpu_counters_init(struct percpu_counter counters[], int num);
+void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num);
+void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num);
+int nfsd_stat_init(void);
+void nfsd_stat_shutdown(void);
+
+static inline void nfsd_stats_rc_hits_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_HITS]);
+}
+
+static inline void nfsd_stats_rc_misses_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_MISSES]);
+}
+
+static inline void nfsd_stats_rc_nocache_inc(void)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_RC_NOCACHE]);
+}
+
+static inline void nfsd_stats_fh_stale_inc(struct svc_export *exp)
+{
+ percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_FH_STALE]);
+ if (exp)
+ percpu_counter_inc(&exp->ex_stats.counter[EXP_STATS_FH_STALE]);
+}
+
+static inline void nfsd_stats_io_read_add(struct svc_export *exp, s64 amount)
+{
+ percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_READ], amount);
+ if (exp)
+ percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_READ], amount);
+}
+
+static inline void nfsd_stats_io_write_add(struct svc_export *exp, s64 amount)
+{
+ percpu_counter_add(&nfsdstats.counter[NFSD_STATS_IO_WRITE], amount);
+ if (exp)
+ percpu_counter_add(&exp->ex_stats.counter[EXP_STATS_IO_WRITE], amount);
+}
+
+static inline void nfsd_stats_payload_misses_inc(struct nfsd_net *nn)
+{
+ percpu_counter_inc(&nn->counter[NFSD_NET_PAYLOAD_MISSES]);
+}
+
+static inline void nfsd_stats_drc_mem_usage_add(struct nfsd_net *nn, s64 amount)
+{
+ percpu_counter_add(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
+}
+
+static inline void nfsd_stats_drc_mem_usage_sub(struct nfsd_net *nn, s64 amount)
+{
+ percpu_counter_sub(&nn->counter[NFSD_NET_DRC_MEM_USAGE], amount);
+}
#endif /* _NFSD_STATS_H */
diff --git a/fs/nfsd/trace.c b/fs/nfsd/trace.c
index 90967466a1e5..f008b95ceec2 100644
--- a/fs/nfsd/trace.c
+++ b/fs/nfsd/trace.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#define CREATE_TRACE_POINTS
#include "trace.h"
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index a952f4a9b2a6..445d00f00eab 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -12,6 +12,86 @@
#include "export.h"
#include "nfsfh.h"
+#define NFSD_TRACE_PROC_ARG_FIELDS \
+ __field(unsigned int, netns_ino) \
+ __field(u32, xid) \
+ __array(unsigned char, server, sizeof(struct sockaddr_in6)) \
+ __array(unsigned char, client, sizeof(struct sockaddr_in6))
+
+#define NFSD_TRACE_PROC_ARG_ASSIGNMENTS \
+ do { \
+ __entry->netns_ino = SVC_NET(rqstp)->ns.inum; \
+ __entry->xid = be32_to_cpu(rqstp->rq_xid); \
+ memcpy(__entry->server, &rqstp->rq_xprt->xpt_local, \
+ rqstp->rq_xprt->xpt_locallen); \
+ memcpy(__entry->client, &rqstp->rq_xprt->xpt_remote, \
+ rqstp->rq_xprt->xpt_remotelen); \
+ } while (0);
+
+#define NFSD_TRACE_PROC_RES_FIELDS \
+ __field(unsigned int, netns_ino) \
+ __field(u32, xid) \
+ __field(unsigned long, status) \
+ __array(unsigned char, server, sizeof(struct sockaddr_in6)) \
+ __array(unsigned char, client, sizeof(struct sockaddr_in6))
+
+#define NFSD_TRACE_PROC_RES_ASSIGNMENTS(error) \
+ do { \
+ __entry->netns_ino = SVC_NET(rqstp)->ns.inum; \
+ __entry->xid = be32_to_cpu(rqstp->rq_xid); \
+ __entry->status = be32_to_cpu(error); \
+ memcpy(__entry->server, &rqstp->rq_xprt->xpt_local, \
+ rqstp->rq_xprt->xpt_locallen); \
+ memcpy(__entry->client, &rqstp->rq_xprt->xpt_remote, \
+ rqstp->rq_xprt->xpt_remotelen); \
+ } while (0);
+
+DECLARE_EVENT_CLASS(nfsd_xdr_err_class,
+ TP_PROTO(
+ const struct svc_rqst *rqstp
+ ),
+ TP_ARGS(rqstp),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_ARG_FIELDS
+
+ __field(u32, vers)
+ __field(u32, proc)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_ARG_ASSIGNMENTS
+
+ __entry->vers = rqstp->rq_vers;
+ __entry->proc = rqstp->rq_proc;
+ ),
+ TP_printk("xid=0x%08x vers=%u proc=%u",
+ __entry->xid, __entry->vers, __entry->proc
+ )
+);
+
+#define DEFINE_NFSD_XDR_ERR_EVENT(name) \
+DEFINE_EVENT(nfsd_xdr_err_class, nfsd_##name##_err, \
+ TP_PROTO(const struct svc_rqst *rqstp), \
+ TP_ARGS(rqstp))
+
+DEFINE_NFSD_XDR_ERR_EVENT(garbage_args);
+DEFINE_NFSD_XDR_ERR_EVENT(cant_encode);
+
+#define show_nfsd_may_flags(x) \
+ __print_flags(x, "|", \
+ { NFSD_MAY_EXEC, "EXEC" }, \
+ { NFSD_MAY_WRITE, "WRITE" }, \
+ { NFSD_MAY_READ, "READ" }, \
+ { NFSD_MAY_SATTR, "SATTR" }, \
+ { NFSD_MAY_TRUNC, "TRUNC" }, \
+ { NFSD_MAY_LOCK, "LOCK" }, \
+ { NFSD_MAY_OWNER_OVERRIDE, "OWNER_OVERRIDE" }, \
+ { NFSD_MAY_LOCAL_ACCESS, "LOCAL_ACCESS" }, \
+ { NFSD_MAY_BYPASS_GSS_ON_ROOT, "BYPASS_GSS_ON_ROOT" }, \
+ { NFSD_MAY_NOT_BREAK_LEASE, "NOT_BREAK_LEASE" }, \
+ { NFSD_MAY_BYPASS_GSS, "BYPASS_GSS" }, \
+ { NFSD_MAY_READ_IF_EXEC, "READ_IF_EXEC" }, \
+ { NFSD_MAY_64BIT_COOKIE, "64BIT_COOKIE" })
+
TRACE_EVENT(nfsd_compound,
TP_PROTO(const struct svc_rqst *rqst,
u32 args_opcnt),
@@ -51,6 +131,56 @@ TRACE_EVENT(nfsd_compound_status,
__get_str(name), __entry->status)
)
+TRACE_EVENT(nfsd_compound_decode_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ u32 args_opcnt,
+ u32 resp_opcnt,
+ u32 opnum,
+ __be32 status
+ ),
+ TP_ARGS(rqstp, args_opcnt, resp_opcnt, opnum, status),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_RES_FIELDS
+
+ __field(u32, args_opcnt)
+ __field(u32, resp_opcnt)
+ __field(u32, opnum)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_RES_ASSIGNMENTS(status)
+
+ __entry->args_opcnt = args_opcnt;
+ __entry->resp_opcnt = resp_opcnt;
+ __entry->opnum = opnum;
+ ),
+ TP_printk("op=%u/%u opnum=%u status=%lu",
+ __entry->resp_opcnt, __entry->args_opcnt,
+ __entry->opnum, __entry->status)
+);
+
+TRACE_EVENT(nfsd_compound_encode_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ u32 opnum,
+ __be32 status
+ ),
+ TP_ARGS(rqstp, opnum, status),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_RES_FIELDS
+
+ __field(u32, opnum)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_RES_ASSIGNMENTS(status)
+
+ __entry->opnum = opnum;
+ ),
+ TP_printk("opnum=%u status=%lu",
+ __entry->opnum, __entry->status)
+);
+
+
DECLARE_EVENT_CLASS(nfsd_fh_err_class,
TP_PROTO(struct svc_rqst *rqstp,
struct svc_fh *fhp,
@@ -247,10 +377,106 @@ DEFINE_EVENT(nfsd_err_class, nfsd_##name, \
DEFINE_NFSD_ERR_EVENT(read_err);
DEFINE_NFSD_ERR_EVENT(write_err);
+TRACE_EVENT(nfsd_dirent,
+ TP_PROTO(struct svc_fh *fhp,
+ u64 ino,
+ const char *name,
+ int namlen),
+ TP_ARGS(fhp, ino, name, namlen),
+ TP_STRUCT__entry(
+ __field(u32, fh_hash)
+ __field(u64, ino)
+ __field(int, len)
+ __dynamic_array(unsigned char, name, namlen)
+ ),
+ TP_fast_assign(
+ __entry->fh_hash = fhp ? knfsd_fh_hash(&fhp->fh_handle) : 0;
+ __entry->ino = ino;
+ __entry->len = namlen;
+ memcpy(__get_str(name), name, namlen);
+ ),
+ TP_printk("fh_hash=0x%08x ino=%llu name=%.*s",
+ __entry->fh_hash, __entry->ino,
+ __entry->len, __get_str(name))
+)
+
+DECLARE_EVENT_CLASS(nfsd_copy_err_class,
+ TP_PROTO(struct svc_rqst *rqstp,
+ struct svc_fh *src_fhp,
+ loff_t src_offset,
+ struct svc_fh *dst_fhp,
+ loff_t dst_offset,
+ u64 count,
+ int status),
+ TP_ARGS(rqstp, src_fhp, src_offset, dst_fhp, dst_offset, count, status),
+ TP_STRUCT__entry(
+ __field(u32, xid)
+ __field(u32, src_fh_hash)
+ __field(loff_t, src_offset)
+ __field(u32, dst_fh_hash)
+ __field(loff_t, dst_offset)
+ __field(u64, count)
+ __field(int, status)
+ ),
+ TP_fast_assign(
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ __entry->src_fh_hash = knfsd_fh_hash(&src_fhp->fh_handle);
+ __entry->src_offset = src_offset;
+ __entry->dst_fh_hash = knfsd_fh_hash(&dst_fhp->fh_handle);
+ __entry->dst_offset = dst_offset;
+ __entry->count = count;
+ __entry->status = status;
+ ),
+ TP_printk("xid=0x%08x src_fh_hash=0x%08x src_offset=%lld "
+ "dst_fh_hash=0x%08x dst_offset=%lld "
+ "count=%llu status=%d",
+ __entry->xid, __entry->src_fh_hash, __entry->src_offset,
+ __entry->dst_fh_hash, __entry->dst_offset,
+ (unsigned long long)__entry->count,
+ __entry->status)
+)
+
+#define DEFINE_NFSD_COPY_ERR_EVENT(name) \
+DEFINE_EVENT(nfsd_copy_err_class, nfsd_##name, \
+ TP_PROTO(struct svc_rqst *rqstp, \
+ struct svc_fh *src_fhp, \
+ loff_t src_offset, \
+ struct svc_fh *dst_fhp, \
+ loff_t dst_offset, \
+ u64 count, \
+ int status), \
+ TP_ARGS(rqstp, src_fhp, src_offset, dst_fhp, dst_offset, \
+ count, status))
+
+DEFINE_NFSD_COPY_ERR_EVENT(clone_file_range_err);
+
#include "state.h"
#include "filecache.h"
#include "vfs.h"
+TRACE_EVENT(nfsd_delegret_wakeup,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct inode *inode,
+ long timeo
+ ),
+ TP_ARGS(rqstp, inode, timeo),
+ TP_STRUCT__entry(
+ __field(u32, xid)
+ __field(const void *, inode)
+ __field(long, timeo)
+ ),
+ TP_fast_assign(
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ __entry->inode = inode;
+ __entry->timeo = timeo;
+ ),
+ TP_printk("xid=0x%08x inode=%p%s",
+ __entry->xid, __entry->inode,
+ __entry->timeo == 0 ? " (timed out)" : ""
+ )
+);
+
DECLARE_EVENT_CLASS(nfsd_stateid_class,
TP_PROTO(stateid_t *stp),
TP_ARGS(stp),
@@ -291,7 +517,7 @@ DEFINE_STATEID_EVENT(layout_recall_release);
DEFINE_STATEID_EVENT(open);
DEFINE_STATEID_EVENT(deleg_read);
-DEFINE_STATEID_EVENT(deleg_break);
+DEFINE_STATEID_EVENT(deleg_return);
DEFINE_STATEID_EVENT(deleg_recall);
DECLARE_EVENT_CLASS(nfsd_stateseqid_class,
@@ -324,6 +550,61 @@ DEFINE_EVENT(nfsd_stateseqid_class, nfsd_##name, \
DEFINE_STATESEQID_EVENT(preprocess);
DEFINE_STATESEQID_EVENT(open_confirm);
+TRACE_DEFINE_ENUM(NFS4_OPEN_STID);
+TRACE_DEFINE_ENUM(NFS4_LOCK_STID);
+TRACE_DEFINE_ENUM(NFS4_DELEG_STID);
+TRACE_DEFINE_ENUM(NFS4_CLOSED_STID);
+TRACE_DEFINE_ENUM(NFS4_REVOKED_DELEG_STID);
+TRACE_DEFINE_ENUM(NFS4_CLOSED_DELEG_STID);
+TRACE_DEFINE_ENUM(NFS4_LAYOUT_STID);
+
+#define show_stid_type(x) \
+ __print_flags(x, "|", \
+ { NFS4_OPEN_STID, "OPEN" }, \
+ { NFS4_LOCK_STID, "LOCK" }, \
+ { NFS4_DELEG_STID, "DELEG" }, \
+ { NFS4_CLOSED_STID, "CLOSED" }, \
+ { NFS4_REVOKED_DELEG_STID, "REVOKED" }, \
+ { NFS4_CLOSED_DELEG_STID, "CLOSED_DELEG" }, \
+ { NFS4_LAYOUT_STID, "LAYOUT" })
+
+DECLARE_EVENT_CLASS(nfsd_stid_class,
+ TP_PROTO(
+ const struct nfs4_stid *stid
+ ),
+ TP_ARGS(stid),
+ TP_STRUCT__entry(
+ __field(unsigned long, sc_type)
+ __field(int, sc_count)
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __field(u32, si_id)
+ __field(u32, si_generation)
+ ),
+ TP_fast_assign(
+ const stateid_t *stp = &stid->sc_stateid;
+
+ __entry->sc_type = stid->sc_type;
+ __entry->sc_count = refcount_read(&stid->sc_count);
+ __entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+ __entry->cl_id = stp->si_opaque.so_clid.cl_id;
+ __entry->si_id = stp->si_opaque.so_id;
+ __entry->si_generation = stp->si_generation;
+ ),
+ TP_printk("client %08x:%08x stateid %08x:%08x ref=%d type=%s",
+ __entry->cl_boot, __entry->cl_id,
+ __entry->si_id, __entry->si_generation,
+ __entry->sc_count, show_stid_type(__entry->sc_type)
+ )
+);
+
+#define DEFINE_STID_EVENT(name) \
+DEFINE_EVENT(nfsd_stid_class, nfsd_stid_##name, \
+ TP_PROTO(const struct nfs4_stid *stid), \
+ TP_ARGS(stid))
+
+DEFINE_STID_EVENT(revoke);
+
DECLARE_EVENT_CLASS(nfsd_clientid_class,
TP_PROTO(const clientid_t *clid),
TP_ARGS(clid),
@@ -343,7 +624,12 @@ DEFINE_EVENT(nfsd_clientid_class, nfsd_clid_##name, \
TP_PROTO(const clientid_t *clid), \
TP_ARGS(clid))
-DEFINE_CLIENTID_EVENT(expired);
+DEFINE_CLIENTID_EVENT(expire_unconf);
+DEFINE_CLIENTID_EVENT(reclaim_complete);
+DEFINE_CLIENTID_EVENT(confirmed);
+DEFINE_CLIENTID_EVENT(destroyed);
+DEFINE_CLIENTID_EVENT(admin_expired);
+DEFINE_CLIENTID_EVENT(replaced);
DEFINE_CLIENTID_EVENT(purged);
DEFINE_CLIENTID_EVENT(renew);
DEFINE_CLIENTID_EVENT(stale);
@@ -368,56 +654,145 @@ DEFINE_EVENT(nfsd_net_class, nfsd_##name, \
DEFINE_NET_EVENT(grace_start);
DEFINE_NET_EVENT(grace_complete);
-TRACE_EVENT(nfsd_clid_inuse_err,
+TRACE_EVENT(nfsd_writeverf_reset,
+ TP_PROTO(
+ const struct nfsd_net *nn,
+ const struct svc_rqst *rqstp,
+ int error
+ ),
+ TP_ARGS(nn, rqstp, error),
+ TP_STRUCT__entry(
+ __field(unsigned long long, boot_time)
+ __field(u32, xid)
+ __field(int, error)
+ __array(unsigned char, verifier, NFS4_VERIFIER_SIZE)
+ ),
+ TP_fast_assign(
+ __entry->boot_time = nn->boot_time;
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ __entry->error = error;
+
+ /* avoid seqlock inside TP_fast_assign */
+ memcpy(__entry->verifier, nn->writeverf,
+ NFS4_VERIFIER_SIZE);
+ ),
+ TP_printk("boot_time=%16llx xid=0x%08x error=%d new verifier=0x%s",
+ __entry->boot_time, __entry->xid, __entry->error,
+ __print_hex_str(__entry->verifier, NFS4_VERIFIER_SIZE)
+ )
+);
+
+TRACE_EVENT(nfsd_clid_cred_mismatch,
+ TP_PROTO(
+ const struct nfs4_client *clp,
+ const struct svc_rqst *rqstp
+ ),
+ TP_ARGS(clp, rqstp),
+ TP_STRUCT__entry(
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __field(unsigned long, cl_flavor)
+ __field(unsigned long, new_flavor)
+ __array(unsigned char, addr, sizeof(struct sockaddr_in6))
+ ),
+ TP_fast_assign(
+ __entry->cl_boot = clp->cl_clientid.cl_boot;
+ __entry->cl_id = clp->cl_clientid.cl_id;
+ __entry->cl_flavor = clp->cl_cred.cr_flavor;
+ __entry->new_flavor = rqstp->rq_cred.cr_flavor;
+ memcpy(__entry->addr, &rqstp->rq_xprt->xpt_remote,
+ sizeof(struct sockaddr_in6));
+ ),
+ TP_printk("client %08x:%08x flavor=%s, conflict=%s from addr=%pISpc",
+ __entry->cl_boot, __entry->cl_id,
+ show_nfsd_authflavor(__entry->cl_flavor),
+ show_nfsd_authflavor(__entry->new_flavor), __entry->addr
+ )
+)
+
+TRACE_EVENT(nfsd_clid_verf_mismatch,
+ TP_PROTO(
+ const struct nfs4_client *clp,
+ const struct svc_rqst *rqstp,
+ const nfs4_verifier *verf
+ ),
+ TP_ARGS(clp, rqstp, verf),
+ TP_STRUCT__entry(
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __array(unsigned char, cl_verifier, NFS4_VERIFIER_SIZE)
+ __array(unsigned char, new_verifier, NFS4_VERIFIER_SIZE)
+ __array(unsigned char, addr, sizeof(struct sockaddr_in6))
+ ),
+ TP_fast_assign(
+ __entry->cl_boot = clp->cl_clientid.cl_boot;
+ __entry->cl_id = clp->cl_clientid.cl_id;
+ memcpy(__entry->cl_verifier, (void *)&clp->cl_verifier,
+ NFS4_VERIFIER_SIZE);
+ memcpy(__entry->new_verifier, (void *)verf,
+ NFS4_VERIFIER_SIZE);
+ memcpy(__entry->addr, &rqstp->rq_xprt->xpt_remote,
+ sizeof(struct sockaddr_in6));
+ ),
+ TP_printk("client %08x:%08x verf=0x%s, updated=0x%s from addr=%pISpc",
+ __entry->cl_boot, __entry->cl_id,
+ __print_hex_str(__entry->cl_verifier, NFS4_VERIFIER_SIZE),
+ __print_hex_str(__entry->new_verifier, NFS4_VERIFIER_SIZE),
+ __entry->addr
+ )
+);
+
+DECLARE_EVENT_CLASS(nfsd_clid_class,
TP_PROTO(const struct nfs4_client *clp),
TP_ARGS(clp),
TP_STRUCT__entry(
__field(u32, cl_boot)
__field(u32, cl_id)
__array(unsigned char, addr, sizeof(struct sockaddr_in6))
- __field(unsigned int, namelen)
- __dynamic_array(unsigned char, name, clp->cl_name.len)
+ __field(unsigned long, flavor)
+ __array(unsigned char, verifier, NFS4_VERIFIER_SIZE)
+ __dynamic_array(char, name, clp->cl_name.len + 1)
),
TP_fast_assign(
__entry->cl_boot = clp->cl_clientid.cl_boot;
__entry->cl_id = clp->cl_clientid.cl_id;
memcpy(__entry->addr, &clp->cl_addr,
sizeof(struct sockaddr_in6));
- __entry->namelen = clp->cl_name.len;
- memcpy(__get_dynamic_array(name), clp->cl_name.data,
- clp->cl_name.len);
+ __entry->flavor = clp->cl_cred.cr_flavor;
+ memcpy(__entry->verifier, (void *)&clp->cl_verifier,
+ NFS4_VERIFIER_SIZE);
+ memcpy(__get_str(name), clp->cl_name.data, clp->cl_name.len);
+ __get_str(name)[clp->cl_name.len] = '\0';
),
- TP_printk("nfs4_clientid %.*s already in use by %pISpc, client %08x:%08x",
- __entry->namelen, __get_str(name), __entry->addr,
+ TP_printk("addr=%pISpc name='%s' verifier=0x%s flavor=%s client=%08x:%08x",
+ __entry->addr, __get_str(name),
+ __print_hex_str(__entry->verifier, NFS4_VERIFIER_SIZE),
+ show_nfsd_authflavor(__entry->flavor),
__entry->cl_boot, __entry->cl_id)
-)
+);
-TRACE_DEFINE_ENUM(NFSD_FILE_HASHED);
-TRACE_DEFINE_ENUM(NFSD_FILE_PENDING);
-TRACE_DEFINE_ENUM(NFSD_FILE_BREAK_READ);
-TRACE_DEFINE_ENUM(NFSD_FILE_BREAK_WRITE);
-TRACE_DEFINE_ENUM(NFSD_FILE_REFERENCED);
+#define DEFINE_CLID_EVENT(name) \
+DEFINE_EVENT(nfsd_clid_class, nfsd_clid_##name, \
+ TP_PROTO(const struct nfs4_client *clp), \
+ TP_ARGS(clp))
+
+DEFINE_CLID_EVENT(fresh);
+DEFINE_CLID_EVENT(confirmed_r);
+/*
+ * from fs/nfsd/filecache.h
+ */
#define show_nf_flags(val) \
__print_flags(val, "|", \
{ 1 << NFSD_FILE_HASHED, "HASHED" }, \
{ 1 << NFSD_FILE_PENDING, "PENDING" }, \
- { 1 << NFSD_FILE_BREAK_READ, "BREAK_READ" }, \
- { 1 << NFSD_FILE_BREAK_WRITE, "BREAK_WRITE" }, \
- { 1 << NFSD_FILE_REFERENCED, "REFERENCED"})
-
-/* FIXME: This should probably be fleshed out in the future. */
-#define show_nf_may(val) \
- __print_flags(val, "|", \
- { NFSD_MAY_READ, "READ" }, \
- { NFSD_MAY_WRITE, "WRITE" }, \
- { NFSD_MAY_NOT_BREAK_LEASE, "NOT_BREAK_LEASE" })
+ { 1 << NFSD_FILE_REFERENCED, "REFERENCED" }, \
+ { 1 << NFSD_FILE_GC, "GC" })
DECLARE_EVENT_CLASS(nfsd_file_class,
TP_PROTO(struct nfsd_file *nf),
TP_ARGS(nf),
TP_STRUCT__entry(
- __field(unsigned int, nf_hashval)
__field(void *, nf_inode)
__field(int, nf_ref)
__field(unsigned long, nf_flags)
@@ -425,19 +800,17 @@ DECLARE_EVENT_CLASS(nfsd_file_class,
__field(struct file *, nf_file)
),
TP_fast_assign(
- __entry->nf_hashval = nf->nf_hashval;
__entry->nf_inode = nf->nf_inode;
__entry->nf_ref = refcount_read(&nf->nf_ref);
__entry->nf_flags = nf->nf_flags;
__entry->nf_may = nf->nf_may;
__entry->nf_file = nf->nf_file;
),
- TP_printk("hash=0x%x inode=0x%p ref=%d flags=%s may=%s file=%p",
- __entry->nf_hashval,
+ TP_printk("inode=%p ref=%d flags=%s may=%s nf_file=%p",
__entry->nf_inode,
__entry->nf_ref,
show_nf_flags(__entry->nf_flags),
- show_nf_may(__entry->nf_may),
+ show_nfsd_may_flags(__entry->nf_may),
__entry->nf_file)
)
@@ -446,34 +819,60 @@ DEFINE_EVENT(nfsd_file_class, name, \
TP_PROTO(struct nfsd_file *nf), \
TP_ARGS(nf))
-DEFINE_NFSD_FILE_EVENT(nfsd_file_alloc);
-DEFINE_NFSD_FILE_EVENT(nfsd_file_put_final);
+DEFINE_NFSD_FILE_EVENT(nfsd_file_free);
DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash);
DEFINE_NFSD_FILE_EVENT(nfsd_file_put);
-DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_release_locked);
+DEFINE_NFSD_FILE_EVENT(nfsd_file_closing);
+DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_queue);
+
+TRACE_EVENT(nfsd_file_alloc,
+ TP_PROTO(
+ const struct nfsd_file *nf
+ ),
+ TP_ARGS(nf),
+ TP_STRUCT__entry(
+ __field(const void *, nf_inode)
+ __field(unsigned long, nf_flags)
+ __field(unsigned long, nf_may)
+ __field(unsigned int, nf_ref)
+ ),
+ TP_fast_assign(
+ __entry->nf_inode = nf->nf_inode;
+ __entry->nf_flags = nf->nf_flags;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->nf_may = nf->nf_may;
+ ),
+ TP_printk("inode=%p ref=%u flags=%s may=%s",
+ __entry->nf_inode, __entry->nf_ref,
+ show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may)
+ )
+);
TRACE_EVENT(nfsd_file_acquire,
- TP_PROTO(struct svc_rqst *rqstp, unsigned int hash,
- struct inode *inode, unsigned int may_flags,
- struct nfsd_file *nf, __be32 status),
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct inode *inode,
+ unsigned int may_flags,
+ const struct nfsd_file *nf,
+ __be32 status
+ ),
- TP_ARGS(rqstp, hash, inode, may_flags, nf, status),
+ TP_ARGS(rqstp, inode, may_flags, nf, status),
TP_STRUCT__entry(
__field(u32, xid)
- __field(unsigned int, hash)
- __field(void *, inode)
- __field(unsigned int, may_flags)
- __field(int, nf_ref)
+ __field(const void *, inode)
+ __field(unsigned long, may_flags)
+ __field(unsigned int, nf_ref)
__field(unsigned long, nf_flags)
- __field(unsigned char, nf_may)
- __field(struct file *, nf_file)
+ __field(unsigned long, nf_may)
+ __field(const void *, nf_file)
__field(u32, status)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(rqstp->rq_xid);
- __entry->hash = hash;
__entry->inode = inode;
__entry->may_flags = may_flags;
__entry->nf_ref = nf ? refcount_read(&nf->nf_ref) : 0;
@@ -483,39 +882,131 @@ TRACE_EVENT(nfsd_file_acquire,
__entry->status = be32_to_cpu(status);
),
- TP_printk("xid=0x%x hash=0x%x inode=0x%p may_flags=%s ref=%d nf_flags=%s nf_may=%s nf_file=0x%p status=%u",
- __entry->xid, __entry->hash, __entry->inode,
- show_nf_may(__entry->may_flags), __entry->nf_ref,
- show_nf_flags(__entry->nf_flags),
- show_nf_may(__entry->nf_may), __entry->nf_file,
- __entry->status)
+ TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p status=%u",
+ __entry->xid, __entry->inode,
+ show_nfsd_may_flags(__entry->may_flags),
+ __entry->nf_ref, show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may),
+ __entry->nf_file, __entry->status
+ )
);
-DECLARE_EVENT_CLASS(nfsd_file_search_class,
- TP_PROTO(struct inode *inode, unsigned int hash, int found),
- TP_ARGS(inode, hash, found),
+TRACE_EVENT(nfsd_file_insert_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct inode *inode,
+ unsigned int may_flags,
+ long error
+ ),
+ TP_ARGS(rqstp, inode, may_flags, error),
TP_STRUCT__entry(
- __field(struct inode *, inode)
- __field(unsigned int, hash)
- __field(int, found)
+ __field(u32, xid)
+ __field(const void *, inode)
+ __field(unsigned long, may_flags)
+ __field(long, error)
),
TP_fast_assign(
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
__entry->inode = inode;
- __entry->hash = hash;
- __entry->found = found;
+ __entry->may_flags = may_flags;
+ __entry->error = error;
),
- TP_printk("hash=0x%x inode=0x%p found=%d", __entry->hash,
- __entry->inode, __entry->found)
+ TP_printk("xid=0x%x inode=%p may_flags=%s error=%ld",
+ __entry->xid, __entry->inode,
+ show_nfsd_may_flags(__entry->may_flags),
+ __entry->error
+ )
);
-#define DEFINE_NFSD_FILE_SEARCH_EVENT(name) \
-DEFINE_EVENT(nfsd_file_search_class, name, \
- TP_PROTO(struct inode *inode, unsigned int hash, int found), \
- TP_ARGS(inode, hash, found))
+TRACE_EVENT(nfsd_file_cons_err,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct inode *inode,
+ unsigned int may_flags,
+ const struct nfsd_file *nf
+ ),
+ TP_ARGS(rqstp, inode, may_flags, nf),
+ TP_STRUCT__entry(
+ __field(u32, xid)
+ __field(const void *, inode)
+ __field(unsigned long, may_flags)
+ __field(unsigned int, nf_ref)
+ __field(unsigned long, nf_flags)
+ __field(unsigned long, nf_may)
+ __field(const void *, nf_file)
+ ),
+ TP_fast_assign(
+ __entry->xid = be32_to_cpu(rqstp->rq_xid);
+ __entry->inode = inode;
+ __entry->may_flags = may_flags;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->nf_flags = nf->nf_flags;
+ __entry->nf_may = nf->nf_may;
+ __entry->nf_file = nf->nf_file;
+ ),
+ TP_printk("xid=0x%x inode=%p may_flags=%s ref=%u nf_flags=%s nf_may=%s nf_file=%p",
+ __entry->xid, __entry->inode,
+ show_nfsd_may_flags(__entry->may_flags), __entry->nf_ref,
+ show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may), __entry->nf_file
+ )
+);
+
+DECLARE_EVENT_CLASS(nfsd_file_open_class,
+ TP_PROTO(const struct nfsd_file *nf, __be32 status),
+ TP_ARGS(nf, status),
+ TP_STRUCT__entry(
+ __field(void *, nf_inode) /* cannot be dereferenced */
+ __field(int, nf_ref)
+ __field(unsigned long, nf_flags)
+ __field(unsigned long, nf_may)
+ __field(void *, nf_file) /* cannot be dereferenced */
+ ),
+ TP_fast_assign(
+ __entry->nf_inode = nf->nf_inode;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->nf_flags = nf->nf_flags;
+ __entry->nf_may = nf->nf_may;
+ __entry->nf_file = nf->nf_file;
+ ),
+ TP_printk("inode=%p ref=%d flags=%s may=%s file=%p",
+ __entry->nf_inode,
+ __entry->nf_ref,
+ show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may),
+ __entry->nf_file)
+)
+
+#define DEFINE_NFSD_FILE_OPEN_EVENT(name) \
+DEFINE_EVENT(nfsd_file_open_class, name, \
+ TP_PROTO( \
+ const struct nfsd_file *nf, \
+ __be32 status \
+ ), \
+ TP_ARGS(nf, status))
-DEFINE_NFSD_FILE_SEARCH_EVENT(nfsd_file_close_inode_sync);
-DEFINE_NFSD_FILE_SEARCH_EVENT(nfsd_file_close_inode);
-DEFINE_NFSD_FILE_SEARCH_EVENT(nfsd_file_is_cached);
+DEFINE_NFSD_FILE_OPEN_EVENT(nfsd_file_open);
+DEFINE_NFSD_FILE_OPEN_EVENT(nfsd_file_opened);
+
+TRACE_EVENT(nfsd_file_is_cached,
+ TP_PROTO(
+ const struct inode *inode,
+ int found
+ ),
+ TP_ARGS(inode, found),
+ TP_STRUCT__entry(
+ __field(const struct inode *, inode)
+ __field(int, found)
+ ),
+ TP_fast_assign(
+ __entry->inode = inode;
+ __entry->found = found;
+ ),
+ TP_printk("inode=%p is %scached",
+ __entry->inode,
+ __entry->found ? "" : "not "
+ )
+);
TRACE_EVENT(nfsd_file_fsnotify_handle_event,
TP_PROTO(struct inode *inode, u32 mask),
@@ -532,10 +1023,95 @@ TRACE_EVENT(nfsd_file_fsnotify_handle_event,
__entry->mode = inode->i_mode;
__entry->mask = mask;
),
- TP_printk("inode=0x%p nlink=%u mode=0%ho mask=0x%x", __entry->inode,
+ TP_printk("inode=%p nlink=%u mode=0%ho mask=0x%x", __entry->inode,
__entry->nlink, __entry->mode, __entry->mask)
);
+DECLARE_EVENT_CLASS(nfsd_file_gc_class,
+ TP_PROTO(
+ const struct nfsd_file *nf
+ ),
+ TP_ARGS(nf),
+ TP_STRUCT__entry(
+ __field(void *, nf_inode)
+ __field(void *, nf_file)
+ __field(int, nf_ref)
+ __field(unsigned long, nf_flags)
+ ),
+ TP_fast_assign(
+ __entry->nf_inode = nf->nf_inode;
+ __entry->nf_file = nf->nf_file;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->nf_flags = nf->nf_flags;
+ ),
+ TP_printk("inode=%p ref=%d nf_flags=%s nf_file=%p",
+ __entry->nf_inode, __entry->nf_ref,
+ show_nf_flags(__entry->nf_flags),
+ __entry->nf_file
+ )
+);
+
+#define DEFINE_NFSD_FILE_GC_EVENT(name) \
+DEFINE_EVENT(nfsd_file_gc_class, name, \
+ TP_PROTO( \
+ const struct nfsd_file *nf \
+ ), \
+ TP_ARGS(nf))
+
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_lru_add);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_lru_add_disposed);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_lru_del);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_lru_del_disposed);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_gc_in_use);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_gc_writeback);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_gc_referenced);
+DEFINE_NFSD_FILE_GC_EVENT(nfsd_file_gc_disposed);
+
+DECLARE_EVENT_CLASS(nfsd_file_lruwalk_class,
+ TP_PROTO(
+ unsigned long removed,
+ unsigned long remaining
+ ),
+ TP_ARGS(removed, remaining),
+ TP_STRUCT__entry(
+ __field(unsigned long, removed)
+ __field(unsigned long, remaining)
+ ),
+ TP_fast_assign(
+ __entry->removed = removed;
+ __entry->remaining = remaining;
+ ),
+ TP_printk("%lu entries removed, %lu remaining",
+ __entry->removed, __entry->remaining)
+);
+
+#define DEFINE_NFSD_FILE_LRUWALK_EVENT(name) \
+DEFINE_EVENT(nfsd_file_lruwalk_class, name, \
+ TP_PROTO( \
+ unsigned long removed, \
+ unsigned long remaining \
+ ), \
+ TP_ARGS(removed, remaining))
+
+DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_gc_removed);
+DEFINE_NFSD_FILE_LRUWALK_EVENT(nfsd_file_shrinker_removed);
+
+TRACE_EVENT(nfsd_file_close,
+ TP_PROTO(
+ const struct inode *inode
+ ),
+ TP_ARGS(inode),
+ TP_STRUCT__entry(
+ __field(const void *, inode)
+ ),
+ TP_fast_assign(
+ __entry->inode = inode;
+ ),
+ TP_printk("inode=%p",
+ __entry->inode
+ )
+);
+
#include "cache.h"
TRACE_DEFINE_ENUM(RC_DROPIT);
@@ -616,9 +1192,9 @@ TRACE_EVENT(nfsd_cb_args,
memcpy(__entry->addr, &conn->cb_addr,
sizeof(struct sockaddr_in6));
),
- TP_printk("client %08x:%08x callback addr=%pISpc prog=%u ident=%u",
- __entry->cl_boot, __entry->cl_id,
- __entry->addr, __entry->prog, __entry->ident)
+ TP_printk("addr=%pISpc client %08x:%08x prog=%u ident=%u",
+ __entry->addr, __entry->cl_boot, __entry->cl_id,
+ __entry->prog, __entry->ident)
);
TRACE_EVENT(nfsd_cb_nodelegs,
@@ -635,11 +1211,6 @@ TRACE_EVENT(nfsd_cb_nodelegs,
TP_printk("client %08x:%08x", __entry->cl_boot, __entry->cl_id)
)
-TRACE_DEFINE_ENUM(NFSD4_CB_UP);
-TRACE_DEFINE_ENUM(NFSD4_CB_UNKNOWN);
-TRACE_DEFINE_ENUM(NFSD4_CB_DOWN);
-TRACE_DEFINE_ENUM(NFSD4_CB_FAULT);
-
#define show_cb_state(val) \
__print_symbolic(val, \
{ NFSD4_CB_UP, "UP" }, \
@@ -673,10 +1244,53 @@ DEFINE_EVENT(nfsd_cb_class, nfsd_cb_##name, \
TP_PROTO(const struct nfs4_client *clp), \
TP_ARGS(clp))
-DEFINE_NFSD_CB_EVENT(setup);
DEFINE_NFSD_CB_EVENT(state);
+DEFINE_NFSD_CB_EVENT(probe);
+DEFINE_NFSD_CB_EVENT(lost);
DEFINE_NFSD_CB_EVENT(shutdown);
+TRACE_DEFINE_ENUM(RPC_AUTH_NULL);
+TRACE_DEFINE_ENUM(RPC_AUTH_UNIX);
+TRACE_DEFINE_ENUM(RPC_AUTH_GSS);
+TRACE_DEFINE_ENUM(RPC_AUTH_GSS_KRB5);
+TRACE_DEFINE_ENUM(RPC_AUTH_GSS_KRB5I);
+TRACE_DEFINE_ENUM(RPC_AUTH_GSS_KRB5P);
+
+#define show_nfsd_authflavor(val) \
+ __print_symbolic(val, \
+ { RPC_AUTH_NULL, "none" }, \
+ { RPC_AUTH_UNIX, "sys" }, \
+ { RPC_AUTH_GSS, "gss" }, \
+ { RPC_AUTH_GSS_KRB5, "krb5" }, \
+ { RPC_AUTH_GSS_KRB5I, "krb5i" }, \
+ { RPC_AUTH_GSS_KRB5P, "krb5p" })
+
+TRACE_EVENT(nfsd_cb_setup,
+ TP_PROTO(const struct nfs4_client *clp,
+ const char *netid,
+ rpc_authflavor_t authflavor
+ ),
+ TP_ARGS(clp, netid, authflavor),
+ TP_STRUCT__entry(
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __field(unsigned long, authflavor)
+ __array(unsigned char, addr, sizeof(struct sockaddr_in6))
+ __array(unsigned char, netid, 8)
+ ),
+ TP_fast_assign(
+ __entry->cl_boot = clp->cl_clientid.cl_boot;
+ __entry->cl_id = clp->cl_clientid.cl_id;
+ strlcpy(__entry->netid, netid, sizeof(__entry->netid));
+ __entry->authflavor = authflavor;
+ memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr,
+ sizeof(struct sockaddr_in6));
+ ),
+ TP_printk("addr=%pISpc client %08x:%08x proto=%s flavor=%s",
+ __entry->addr, __entry->cl_boot, __entry->cl_id,
+ __entry->netid, show_nfsd_authflavor(__entry->authflavor))
+);
+
TRACE_EVENT(nfsd_cb_setup_err,
TP_PROTO(
const struct nfs4_client *clp,
@@ -700,54 +1314,138 @@ TRACE_EVENT(nfsd_cb_setup_err,
__entry->addr, __entry->cl_boot, __entry->cl_id, __entry->error)
);
-TRACE_EVENT(nfsd_cb_work,
+TRACE_EVENT(nfsd_cb_recall,
TP_PROTO(
- const struct nfs4_client *clp,
- const char *procedure
+ const struct nfs4_stid *stid
+ ),
+ TP_ARGS(stid),
+ TP_STRUCT__entry(
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __field(u32, si_id)
+ __field(u32, si_generation)
+ __array(unsigned char, addr, sizeof(struct sockaddr_in6))
),
- TP_ARGS(clp, procedure),
+ TP_fast_assign(
+ const stateid_t *stp = &stid->sc_stateid;
+ const struct nfs4_client *clp = stid->sc_client;
+
+ __entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+ __entry->cl_id = stp->si_opaque.so_clid.cl_id;
+ __entry->si_id = stp->si_opaque.so_id;
+ __entry->si_generation = stp->si_generation;
+ if (clp)
+ memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr,
+ sizeof(struct sockaddr_in6));
+ else
+ memset(__entry->addr, 0, sizeof(struct sockaddr_in6));
+ ),
+ TP_printk("addr=%pISpc client %08x:%08x stateid %08x:%08x",
+ __entry->addr, __entry->cl_boot, __entry->cl_id,
+ __entry->si_id, __entry->si_generation)
+);
+
+TRACE_EVENT(nfsd_cb_notify_lock,
+ TP_PROTO(
+ const struct nfs4_lockowner *lo,
+ const struct nfsd4_blocked_lock *nbl
+ ),
+ TP_ARGS(lo, nbl),
TP_STRUCT__entry(
__field(u32, cl_boot)
__field(u32, cl_id)
- __string(procedure, procedure)
+ __field(u32, fh_hash)
__array(unsigned char, addr, sizeof(struct sockaddr_in6))
),
TP_fast_assign(
+ const struct nfs4_client *clp = lo->lo_owner.so_client;
+
__entry->cl_boot = clp->cl_clientid.cl_boot;
__entry->cl_id = clp->cl_clientid.cl_id;
- __assign_str(procedure, procedure)
+ __entry->fh_hash = knfsd_fh_hash(&nbl->nbl_fh);
memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr,
sizeof(struct sockaddr_in6));
),
- TP_printk("addr=%pISpc client %08x:%08x procedure=%s",
+ TP_printk("addr=%pISpc client %08x:%08x fh_hash=0x%08x",
__entry->addr, __entry->cl_boot, __entry->cl_id,
- __get_str(procedure))
+ __entry->fh_hash)
);
-TRACE_EVENT(nfsd_cb_done,
+TRACE_EVENT(nfsd_cb_offload,
TP_PROTO(
const struct nfs4_client *clp,
- int status
+ const stateid_t *stp,
+ const struct knfsd_fh *fh,
+ u64 count,
+ __be32 status
),
- TP_ARGS(clp, status),
+ TP_ARGS(clp, stp, fh, count, status),
TP_STRUCT__entry(
__field(u32, cl_boot)
__field(u32, cl_id)
+ __field(u32, si_id)
+ __field(u32, si_generation)
+ __field(u32, fh_hash)
__field(int, status)
+ __field(u64, count)
__array(unsigned char, addr, sizeof(struct sockaddr_in6))
),
TP_fast_assign(
- __entry->cl_boot = clp->cl_clientid.cl_boot;
- __entry->cl_id = clp->cl_clientid.cl_id;
- __entry->status = status;
+ __entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+ __entry->cl_id = stp->si_opaque.so_clid.cl_id;
+ __entry->si_id = stp->si_opaque.so_id;
+ __entry->si_generation = stp->si_generation;
+ __entry->fh_hash = knfsd_fh_hash(fh);
+ __entry->status = be32_to_cpu(status);
+ __entry->count = count;
memcpy(__entry->addr, &clp->cl_cb_conn.cb_addr,
sizeof(struct sockaddr_in6));
),
- TP_printk("addr=%pISpc client %08x:%08x status=%d",
+ TP_printk("addr=%pISpc client %08x:%08x stateid %08x:%08x fh_hash=0x%08x count=%llu status=%d",
__entry->addr, __entry->cl_boot, __entry->cl_id,
- __entry->status)
+ __entry->si_id, __entry->si_generation,
+ __entry->fh_hash, __entry->count, __entry->status)
+);
+
+DECLARE_EVENT_CLASS(nfsd_cb_done_class,
+ TP_PROTO(
+ const stateid_t *stp,
+ const struct rpc_task *task
+ ),
+ TP_ARGS(stp, task),
+ TP_STRUCT__entry(
+ __field(u32, cl_boot)
+ __field(u32, cl_id)
+ __field(u32, si_id)
+ __field(u32, si_generation)
+ __field(int, status)
+ ),
+ TP_fast_assign(
+ __entry->cl_boot = stp->si_opaque.so_clid.cl_boot;
+ __entry->cl_id = stp->si_opaque.so_clid.cl_id;
+ __entry->si_id = stp->si_opaque.so_id;
+ __entry->si_generation = stp->si_generation;
+ __entry->status = task->tk_status;
+ ),
+ TP_printk("client %08x:%08x stateid %08x:%08x status=%d",
+ __entry->cl_boot, __entry->cl_id, __entry->si_id,
+ __entry->si_generation, __entry->status
+ )
);
+#define DEFINE_NFSD_CB_DONE_EVENT(name) \
+DEFINE_EVENT(nfsd_cb_done_class, name, \
+ TP_PROTO( \
+ const stateid_t *stp, \
+ const struct rpc_task *task \
+ ), \
+ TP_ARGS(stp, task))
+
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_recall_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_notify_lock_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_layout_done);
+DEFINE_NFSD_CB_DONE_EVENT(nfsd_cb_offload_done);
+
#endif /* _NFSD_TRACE_H */
#undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 31edb883afd0..0ea05ddff0d0 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -32,14 +32,13 @@
#include <linux/writeback.h>
#include <linux/security.h>
-#ifdef CONFIG_NFSD_V3
#include "xdr3.h"
-#endif /* CONFIG_NFSD_V3 */
#ifdef CONFIG_NFSD_V4
#include "../internal.h"
#include "acl.h"
#include "idmap.h"
+#include "xdr4.h"
#endif /* CONFIG_NFSD_V4 */
#include "nfsd.h"
@@ -49,6 +48,69 @@
#define NFSDDBG_FACILITY NFSDDBG_FILEOP
+/**
+ * nfserrno - Map Linux errnos to NFS errnos
+ * @errno: POSIX(-ish) error code to be mapped
+ *
+ * Returns the appropriate (net-endian) nfserr_* (or nfs_ok if errno is 0). If
+ * it's an error we don't expect, log it once and return nfserr_io.
+ */
+__be32
+nfserrno (int errno)
+{
+ static struct {
+ __be32 nfserr;
+ int syserr;
+ } nfs_errtbl[] = {
+ { nfs_ok, 0 },
+ { nfserr_perm, -EPERM },
+ { nfserr_noent, -ENOENT },
+ { nfserr_io, -EIO },
+ { nfserr_nxio, -ENXIO },
+ { nfserr_fbig, -E2BIG },
+ { nfserr_stale, -EBADF },
+ { nfserr_acces, -EACCES },
+ { nfserr_exist, -EEXIST },
+ { nfserr_xdev, -EXDEV },
+ { nfserr_mlink, -EMLINK },
+ { nfserr_nodev, -ENODEV },
+ { nfserr_notdir, -ENOTDIR },
+ { nfserr_isdir, -EISDIR },
+ { nfserr_inval, -EINVAL },
+ { nfserr_fbig, -EFBIG },
+ { nfserr_nospc, -ENOSPC },
+ { nfserr_rofs, -EROFS },
+ { nfserr_mlink, -EMLINK },
+ { nfserr_nametoolong, -ENAMETOOLONG },
+ { nfserr_notempty, -ENOTEMPTY },
+ { nfserr_dquot, -EDQUOT },
+ { nfserr_stale, -ESTALE },
+ { nfserr_jukebox, -ETIMEDOUT },
+ { nfserr_jukebox, -ERESTARTSYS },
+ { nfserr_jukebox, -EAGAIN },
+ { nfserr_jukebox, -EWOULDBLOCK },
+ { nfserr_jukebox, -ENOMEM },
+ { nfserr_io, -ETXTBSY },
+ { nfserr_notsupp, -EOPNOTSUPP },
+ { nfserr_toosmall, -ETOOSMALL },
+ { nfserr_serverfault, -ESERVERFAULT },
+ { nfserr_serverfault, -ENFILE },
+ { nfserr_io, -EREMOTEIO },
+ { nfserr_stale, -EOPENSTALE },
+ { nfserr_io, -EUCLEAN },
+ { nfserr_perm, -ENOKEY },
+ { nfserr_no_grace, -ENOGRACE},
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
+ if (nfs_errtbl[i].syserr == errno)
+ return nfs_errtbl[i].nfserr;
+ }
+ WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno);
+ return nfserr_io;
+}
+
/*
* Called from nfsd_lookup and encode_dirent. Check if we have crossed
* a mount point.
@@ -199,27 +261,13 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
goto out_nfserr;
}
} else {
- /*
- * In the nfsd4_open() case, this may be held across
- * subsequent open and delegation acquisition which may
- * need to take the child's i_mutex:
- */
- fh_lock_nested(fhp, I_MUTEX_PARENT);
- dentry = lookup_one_len(name, dparent, len);
+ dentry = lookup_one_len_unlocked(name, dparent, len);
host_err = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto out_nfserr;
if (nfsd_mountpoint(dentry, exp)) {
- /*
- * We don't need the i_mutex after all. It's
- * still possible we could open this (regular
- * files can be mountpoints too), but the
- * i_mutex is just there to prevent renames of
- * something that we might be about to delegate,
- * and a mountpoint won't be renamed:
- */
- fh_unlock(fhp);
- if ((host_err = nfsd_cross_mnt(rqstp, &dentry, &exp))) {
+ host_err = nfsd_cross_mnt(rqstp, &dentry, &exp);
+ if (host_err) {
dput(dentry);
goto out_nfserr;
}
@@ -234,7 +282,15 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
return nfserrno(host_err);
}
-/*
+/**
+ * nfsd_lookup - look up a single path component for nfsd
+ *
+ * @rqstp: the request context
+ * @fhp: the file handle of the directory
+ * @name: the component name, or %NULL to look up parent
+ * @len: length of name to examine
+ * @resfh: pointer to pre-initialised filehandle to hold result.
+ *
* Look up one component of a pathname.
* N.B. After this call _both_ fhp and resfh need an fh_put
*
@@ -244,11 +300,11 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
* returned. Otherwise the covered directory is returned.
* NOTE: this mountpoint crossing is not supported properly by all
* clients and is explicitly disallowed for NFSv3
- * NeilBrown <neilb@....unsw.edu.au>
+ *
*/
__be32
nfsd_lookup(struct svc_rqst *rqstp, struct svc_fh *fhp, const char *name,
- unsigned int len, struct svc_fh *resfh)
+ unsigned int len, struct svc_fh *resfh)
{
struct svc_export *exp;
struct dentry *dentry;
@@ -306,6 +362,10 @@ commit_metadata(struct svc_fh *fhp)
static void
nfsd_sanitize_attrs(struct inode *inode, struct iattr *iap)
{
+ /* Ignore mode updates on symlinks */
+ if (S_ISLNK(inode->i_mode))
+ iap->ia_valid &= ~ATTR_MODE;
+
/* sanitize the mode change */
if (iap->ia_valid & ATTR_MODE) {
iap->ia_mode &= S_IALLUGO;
@@ -359,21 +419,77 @@ nfsd_get_write_access(struct svc_rqst *rqstp, struct svc_fh *fhp,
return nfserrno(host_err);
}
-/*
- * Set various file attributes. After this call fhp needs an fh_put.
+static int __nfsd_setattr(struct dentry *dentry, struct iattr *iap)
+{
+ int host_err;
+
+ if (iap->ia_valid & ATTR_SIZE) {
+ /*
+ * RFC5661, Section 18.30.4:
+ * Changing the size of a file with SETATTR indirectly
+ * changes the time_modify and change attributes.
+ *
+ * (and similar for the older RFCs)
+ */
+ struct iattr size_attr = {
+ .ia_valid = ATTR_SIZE | ATTR_CTIME | ATTR_MTIME,
+ .ia_size = iap->ia_size,
+ };
+
+ if (iap->ia_size < 0)
+ return -EFBIG;
+
+ host_err = notify_change(dentry, &size_attr, NULL);
+ if (host_err)
+ return host_err;
+ iap->ia_valid &= ~ATTR_SIZE;
+
+ /*
+ * Avoid the additional setattr call below if the only other
+ * attribute that the client sends is the mtime, as we update
+ * it as part of the size change above.
+ */
+ if ((iap->ia_valid & ~ATTR_MTIME) == 0)
+ return 0;
+ }
+
+ if (!iap->ia_valid)
+ return 0;
+
+ iap->ia_valid |= ATTR_CTIME;
+ return notify_change(dentry, iap, NULL);
+}
+
+/**
+ * nfsd_setattr - Set various file attributes.
+ * @rqstp: controlling RPC transaction
+ * @fhp: filehandle of target
+ * @attr: attributes to set
+ * @check_guard: set to 1 if guardtime is a valid timestamp
+ * @guardtime: do not act if ctime.tv_sec does not match this timestamp
+ *
+ * This call may adjust the contents of @attr (in particular, this
+ * call may change the bits in the na_iattr.ia_valid field).
+ *
+ * Returns nfs_ok on success, otherwise an NFS status code is
+ * returned. Caller must release @fhp by calling fh_put in either
+ * case.
*/
__be32
-nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
+nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct nfsd_attrs *attr,
int check_guard, time64_t guardtime)
{
struct dentry *dentry;
struct inode *inode;
+ struct iattr *iap = attr->na_iattr;
int accmode = NFSD_MAY_SATTR;
umode_t ftype = 0;
__be32 err;
- int host_err;
+ int host_err = 0;
bool get_write_count;
bool size_change = (iap->ia_valid & ATTR_SIZE);
+ int retries;
if (iap->ia_valid & ATTR_SIZE) {
accmode |= NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE;
@@ -409,13 +525,6 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
dentry = fhp->fh_dentry;
inode = d_inode(dentry);
- /* Ignore any mode updates on symlinks */
- if (S_ISLNK(inode->i_mode))
- iap->ia_valid &= ~ATTR_MODE;
-
- if (!iap->ia_valid)
- return 0;
-
nfsd_sanitize_attrs(inode, iap);
if (check_guard && guardtime != inode->i_ctime.tv_sec)
@@ -434,45 +543,41 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
return err;
}
- fh_lock(fhp);
- if (size_change) {
- /*
- * RFC5661, Section 18.30.4:
- * Changing the size of a file with SETATTR indirectly
- * changes the time_modify and change attributes.
- *
- * (and similar for the older RFCs)
- */
- struct iattr size_attr = {
- .ia_valid = ATTR_SIZE | ATTR_CTIME | ATTR_MTIME,
- .ia_size = iap->ia_size,
- };
-
- host_err = notify_change(dentry, &size_attr, NULL);
- if (host_err)
- goto out_unlock;
- iap->ia_valid &= ~ATTR_SIZE;
+ inode_lock(inode);
+ fh_fill_pre_attrs(fhp);
+ for (retries = 1;;) {
+ struct iattr attrs;
/*
- * Avoid the additional setattr call below if the only other
- * attribute that the client sends is the mtime, as we update
- * it as part of the size change above.
+ * notify_change() can alter its iattr argument, making
+ * @iap unsuitable for submission multiple times. Make a
+ * copy for every loop iteration.
*/
- if ((iap->ia_valid & ~ATTR_MTIME) == 0)
- goto out_unlock;
+ attrs = *iap;
+ host_err = __nfsd_setattr(dentry, &attrs);
+ if (host_err != -EAGAIN || !retries--)
+ break;
+ if (!nfsd_wait_for_delegreturn(rqstp, inode))
+ break;
}
-
- iap->ia_valid |= ATTR_CTIME;
- host_err = notify_change(dentry, iap, NULL);
-
-out_unlock:
- fh_unlock(fhp);
+ if (attr->na_seclabel && attr->na_seclabel->len)
+ attr->na_labelerr = security_inode_setsecctx(dentry,
+ attr->na_seclabel->data, attr->na_seclabel->len);
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL) && attr->na_pacl)
+ attr->na_aclerr = set_posix_acl(inode, ACL_TYPE_ACCESS,
+ attr->na_pacl);
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL) &&
+ !attr->na_aclerr && attr->na_dpacl && S_ISDIR(inode->i_mode))
+ attr->na_aclerr = set_posix_acl(inode, ACL_TYPE_DEFAULT,
+ attr->na_dpacl);
+ fh_fill_post_attrs(fhp);
+ inode_unlock(inode);
if (size_change)
put_write_access(inode);
out:
if (!host_err)
host_err = commit_metadata(fhp);
- return nfserrno(host_err);
+ return err != 0 ? err : nfserrno(host_err);
}
#if defined(CONFIG_NFSD_V4)
@@ -503,35 +608,16 @@ int nfsd4_is_junction(struct dentry *dentry)
return 0;
return 1;
}
-#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
-__be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct xdr_netobj *label)
-{
- __be32 error;
- int host_error;
- struct dentry *dentry;
- error = fh_verify(rqstp, fhp, 0 /* S_IFREG */, NFSD_MAY_SATTR);
- if (error)
- return error;
-
- dentry = fhp->fh_dentry;
-
- inode_lock(d_inode(dentry));
- host_error = security_inode_setsecctx(dentry, label->data, label->len);
- inode_unlock(d_inode(dentry));
- return nfserrno(host_error);
-}
-#else
-__be32 nfsd4_set_nfs4_label(struct svc_rqst *rqstp, struct svc_fh *fhp,
- struct xdr_netobj *label)
+static struct nfsd4_compound_state *nfsd4_get_cstate(struct svc_rqst *rqstp)
{
- return nfserr_notsupp;
+ return &((struct nfsd4_compoundres *)rqstp->rq_resp)->cstate;
}
-#endif
-__be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
- struct nfsd_file *nf_dst, u64 dst_pos, u64 count, bool sync)
+__be32 nfsd4_clone_file_range(struct svc_rqst *rqstp,
+ struct nfsd_file *nf_src, u64 src_pos,
+ struct nfsd_file *nf_dst, u64 dst_pos,
+ u64 count, bool sync)
{
struct file *src = nf_src->nf_file;
struct file *dst = nf_dst->nf_file;
@@ -558,8 +644,17 @@ __be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
if (!status)
status = commit_inode_metadata(file_inode(src));
if (status < 0) {
- nfsd_reset_boot_verifier(net_generic(nf_dst->nf_net,
- nfsd_net_id));
+ struct nfsd_net *nn = net_generic(nf_dst->nf_net,
+ nfsd_net_id);
+
+ trace_nfsd_clone_file_range_err(rqstp,
+ &nfsd4_get_cstate(rqstp)->save_fh,
+ src_pos,
+ &nfsd4_get_cstate(rqstp)->current_fh,
+ dst_pos,
+ count, status);
+ nfsd_reset_write_verifier(nn);
+ trace_nfsd_writeverf_reset(nn, rqstp, status);
ret = nfserrno(status);
}
}
@@ -606,7 +701,6 @@ __be32 nfsd4_vfs_fallocate(struct svc_rqst *rqstp, struct svc_fh *fhp,
}
#endif /* defined(CONFIG_NFSD_V4) */
-#ifdef CONFIG_NFSD_V3
/*
* Check server access rights to a file system object
*/
@@ -718,7 +812,6 @@ nfsd_access(struct svc_rqst *rqstp, struct svc_fh *fhp, u32 *access, u32 *suppor
out:
return error;
}
-#endif /* CONFIG_NFSD_V3 */
int nfsd_open_break_lease(struct inode *inode, int access)
{
@@ -751,9 +844,6 @@ __nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
path.dentry = fhp->fh_dentry;
inode = d_inode(path.dentry);
- /* Disallow write access to files with the append-only bit set
- * or any access when mandatory locking enabled
- */
err = nfserr_perm;
if (IS_APPEND(inode) && (may_flags & NFSD_MAY_WRITE))
goto out;
@@ -808,6 +898,7 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
int may_flags, struct file **filp)
{
__be32 err;
+ bool retried = false;
validate_process_creds();
/*
@@ -823,21 +914,37 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
*/
if (type == S_IFREG)
may_flags |= NFSD_MAY_OWNER_OVERRIDE;
+retry:
err = fh_verify(rqstp, fhp, type, may_flags);
- if (!err)
+ if (!err) {
err = __nfsd_open(rqstp, fhp, type, may_flags, filp);
+ if (err == nfserr_stale && !retried) {
+ retried = true;
+ fh_put(fhp);
+ goto retry;
+ }
+ }
validate_process_creds();
return err;
}
+/**
+ * nfsd_open_verified - Open a regular file for the filecache
+ * @rqstp: RPC request
+ * @fhp: NFS filehandle of the file to open
+ * @may_flags: internal permission flags
+ * @filp: OUT: open "struct file *"
+ *
+ * Returns an nfsstat value in network byte order.
+ */
__be32
-nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type,
- int may_flags, struct file **filp)
+nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, int may_flags,
+ struct file **filp)
{
__be32 err;
validate_process_creds();
- err = __nfsd_open(rqstp, fhp, type, may_flags, filp);
+ err = __nfsd_open(rqstp, fhp, S_IFREG, may_flags, filp);
validate_process_creds();
return err;
}
@@ -852,28 +959,24 @@ nfsd_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
struct splice_desc *sd)
{
struct svc_rqst *rqstp = sd->u.data;
- struct page **pp = rqstp->rq_next_page;
- struct page *page = buf->page;
- size_t size;
-
- size = sd->len;
-
- if (rqstp->rq_res.page_len == 0) {
- get_page(page);
- put_page(*rqstp->rq_next_page);
- *(rqstp->rq_next_page++) = page;
- rqstp->rq_res.page_base = buf->offset;
- rqstp->rq_res.page_len = size;
- } else if (page != pp[-1]) {
- get_page(page);
- if (*rqstp->rq_next_page)
- put_page(*rqstp->rq_next_page);
- *(rqstp->rq_next_page++) = page;
- rqstp->rq_res.page_len += size;
- } else
- rqstp->rq_res.page_len += size;
+ struct page *page = buf->page; // may be a compound one
+ unsigned offset = buf->offset;
+ struct page *last_page;
- return size;
+ last_page = page + (offset + sd->len - 1) / PAGE_SIZE;
+ for (page += offset / PAGE_SIZE; page <= last_page; page++) {
+ /*
+ * Skip page replacement when extending the contents
+ * of the current page.
+ */
+ if (page == *(rqstp->rq_next_page - 1))
+ continue;
+ svc_rqst_replace_page(rqstp, page);
+ }
+ if (rqstp->rq_res.page_len == 0) // first call
+ rqstp->rq_res.page_base = offset % PAGE_SIZE;
+ rqstp->rq_res.page_len += sd->len;
+ return sd->len;
}
static int nfsd_direct_splice_actor(struct pipe_inode_info *pipe,
@@ -897,7 +1000,7 @@ static __be32 nfsd_finish_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
unsigned long *count, u32 *eof, ssize_t host_err)
{
if (host_err >= 0) {
- nfsdstats.io_read += host_err;
+ nfsd_stats_io_read_add(fhp->fh_export, host_err);
*eof = nfsd_eof_on_read(file, offset, host_err, *count);
*count = host_err;
fsnotify_access(file);
@@ -985,7 +1088,9 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
unsigned long *cnt, int stable,
__be32 *verf)
{
+ struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
struct file *file = nf->nf_file;
+ struct super_block *sb = file_inode(file)->i_sb;
struct svc_export *exp;
struct iov_iter iter;
errseq_t since;
@@ -993,12 +1098,18 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
int host_err;
int use_wgather;
loff_t pos = offset;
+ unsigned long exp_op_flags = 0;
unsigned int pflags = current->flags;
rwf_t flags = 0;
+ bool restore_flags = false;
trace_nfsd_write_opened(rqstp, fhp, offset, *cnt);
- if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
+ if (sb->s_export_op)
+ exp_op_flags = sb->s_export_op->flags;
+
+ if (test_bit(RQ_LOCAL, &rqstp->rq_flags) &&
+ !(exp_op_flags & EXPORT_OP_REMOTE_FS)) {
/*
* We want throttling in balance_dirty_pages()
* and shrink_inactive_list() to only consider
@@ -1007,6 +1118,8 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
* the client's dirty pages or its congested queue.
*/
current->flags |= PF_LOCAL_THROTTLE;
+ restore_flags = true;
+ }
exp = fhp->fh_export;
use_wgather = (rqstp->rq_vers == 2) && EX_WGATHER(exp);
@@ -1019,29 +1132,18 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
iov_iter_kvec(&iter, WRITE, vec, vlen, *cnt);
since = READ_ONCE(file->f_wb_err);
- if (flags & RWF_SYNC) {
- if (verf)
- nfsd_copy_boot_verifier(verf,
- net_generic(SVC_NET(rqstp),
- nfsd_net_id));
- host_err = vfs_iter_write(file, &iter, &pos, flags);
- if (host_err < 0)
- nfsd_reset_boot_verifier(net_generic(SVC_NET(rqstp),
- nfsd_net_id));
- } else {
- if (verf)
- nfsd_copy_boot_verifier(verf,
- net_generic(SVC_NET(rqstp),
- nfsd_net_id));
- host_err = vfs_iter_write(file, &iter, &pos, flags);
- }
+ if (verf)
+ nfsd_copy_write_verifier(verf, nn);
+ file_start_write(file);
+ host_err = vfs_iter_write(file, &iter, &pos, flags);
+ file_end_write(file);
if (host_err < 0) {
- nfsd_reset_boot_verifier(net_generic(SVC_NET(rqstp),
- nfsd_net_id));
+ nfsd_reset_write_verifier(nn);
+ trace_nfsd_writeverf_reset(nn, rqstp, host_err);
goto out_nfserr;
}
*cnt = host_err;
- nfsdstats.io_write += *cnt;
+ nfsd_stats_io_write_add(exp, *cnt);
fsnotify_modify(file);
host_err = filemap_check_wb_err(file->f_mapping, since);
if (host_err < 0)
@@ -1049,9 +1151,10 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
if (stable && use_wgather) {
host_err = wait_for_concurrent_writes(file);
- if (host_err < 0)
- nfsd_reset_boot_verifier(net_generic(SVC_NET(rqstp),
- nfsd_net_id));
+ if (host_err < 0) {
+ nfsd_reset_write_verifier(nn);
+ trace_nfsd_writeverf_reset(nn, rqstp, host_err);
+ }
}
out_nfserr:
@@ -1062,7 +1165,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
trace_nfsd_write_err(rqstp, fhp, offset, host_err);
nfserr = nfserrno(host_err);
}
- if (test_bit(RQ_LOCAL, &rqstp->rq_flags))
+ if (restore_flags)
current_restore_flags(pflags, PF_LOCAL_THROTTLE);
return nfserr;
}
@@ -1081,7 +1184,7 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
__be32 err;
trace_nfsd_read_start(rqstp, fhp, offset, *count);
- err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf);
+ err = nfsd_file_acquire_gc(rqstp, fhp, NFSD_MAY_READ, &nf);
if (err)
return err;
@@ -1113,7 +1216,7 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
trace_nfsd_write_start(rqstp, fhp, offset, *cnt);
- err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_WRITE, &nf);
+ err = nfsd_file_acquire_gc(rqstp, fhp, NFSD_MAY_WRITE, &nf);
if (err)
goto out;
@@ -1125,45 +1228,59 @@ nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
return err;
}
-#ifdef CONFIG_NFSD_V3
-/*
- * Commit all pending writes to stable storage.
+/**
+ * nfsd_commit - Commit pending writes to stable storage
+ * @rqstp: RPC request being processed
+ * @fhp: NFS filehandle
+ * @nf: target file
+ * @offset: raw offset from beginning of file
+ * @count: raw count of bytes to sync
+ * @verf: filled in with the server's current write verifier
*
- * Note: we only guarantee that data that lies within the range specified
- * by the 'offset' and 'count' parameters will be synced.
+ * Note: we guarantee that data that lies within the range specified
+ * by the 'offset' and 'count' parameters will be synced. The server
+ * is permitted to sync data that lies outside this range at the
+ * same time.
*
* Unfortunately we cannot lock the file to make sure we return full WCC
* data to the client, as locking happens lower down in the filesystem.
+ *
+ * Return values:
+ * An nfsstat value in network byte order.
*/
__be32
-nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
- loff_t offset, unsigned long count, __be32 *verf)
+nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
+ u64 offset, u32 count, __be32 *verf)
{
- struct nfsd_file *nf;
- loff_t end = LLONG_MAX;
- __be32 err = nfserr_inval;
+ __be32 err = nfs_ok;
+ u64 maxbytes;
+ loff_t start, end;
+ struct nfsd_net *nn;
- if (offset < 0)
- goto out;
- if (count != 0) {
- end = offset + (loff_t)count - 1;
- if (end < offset)
- goto out;
+ /*
+ * Convert the client-provided (offset, count) range to a
+ * (start, end) range. If the client-provided range falls
+ * outside the maximum file size of the underlying FS,
+ * clamp the sync range appropriately.
+ */
+ start = 0;
+ end = LLONG_MAX;
+ maxbytes = (u64)fhp->fh_dentry->d_sb->s_maxbytes;
+ if (offset < maxbytes) {
+ start = offset;
+ if (count && (offset + count - 1 < maxbytes))
+ end = offset + count - 1;
}
- err = nfsd_file_acquire(rqstp, fhp,
- NFSD_MAY_WRITE|NFSD_MAY_NOT_BREAK_LEASE, &nf);
- if (err)
- goto out;
+ nn = net_generic(nf->nf_net, nfsd_net_id);
if (EX_ISSYNC(fhp->fh_export)) {
errseq_t since = READ_ONCE(nf->nf_file->f_wb_err);
int err2;
- err2 = vfs_fsync_range(nf->nf_file, offset, end, 0);
+ err2 = vfs_fsync_range(nf->nf_file, start, end, 0);
switch (err2) {
case 0:
- nfsd_copy_boot_verifier(verf, net_generic(nf->nf_net,
- nfsd_net_id));
+ nfsd_copy_write_verifier(verf, nn);
err2 = filemap_check_wb_err(nf->nf_file->f_mapping,
since);
err = nfserrno(err2);
@@ -1172,28 +1289,37 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp,
err = nfserr_notsupp;
break;
default:
- nfsd_reset_boot_verifier(net_generic(nf->nf_net,
- nfsd_net_id));
+ nfsd_reset_write_verifier(nn);
+ trace_nfsd_writeverf_reset(nn, rqstp, err2);
err = nfserrno(err2);
}
} else
- nfsd_copy_boot_verifier(verf, net_generic(nf->nf_net,
- nfsd_net_id));
+ nfsd_copy_write_verifier(verf, nn);
- nfsd_file_put(nf);
-out:
return err;
}
-#endif /* CONFIG_NFSD_V3 */
-static __be32
-nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
- struct iattr *iap)
+/**
+ * nfsd_create_setattr - Set a created file's attributes
+ * @rqstp: RPC transaction being executed
+ * @fhp: NFS filehandle of parent directory
+ * @resfhp: NFS filehandle of new object
+ * @attrs: requested attributes of new object
+ *
+ * Returns nfs_ok on success, or an nfsstat in network byte order.
+ */
+__be32
+nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct svc_fh *resfhp, struct nfsd_attrs *attrs)
{
+ struct iattr *iap = attrs->na_iattr;
+ __be32 status;
+
/*
- * Mode has already been set earlier in create:
+ * Mode has already been set by file creation.
*/
iap->ia_valid &= ~ATTR_MODE;
+
/*
* Setting uid/gid works only for root. Irix appears to
* send along the gid on create when it tries to implement
@@ -1201,10 +1327,31 @@ nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *resfhp,
*/
if (!uid_eq(current_fsuid(), GLOBAL_ROOT_UID))
iap->ia_valid &= ~(ATTR_UID|ATTR_GID);
+
+ /*
+ * Callers expect new file metadata to be committed even
+ * if the attributes have not changed.
+ */
if (iap->ia_valid)
- return nfsd_setattr(rqstp, resfhp, iap, 0, (time64_t)0);
- /* Callers expect file metadata to be committed here */
- return nfserrno(commit_metadata(resfhp));
+ status = nfsd_setattr(rqstp, resfhp, attrs, 0, (time64_t)0);
+ else
+ status = nfserrno(commit_metadata(resfhp));
+
+ /*
+ * Transactional filesystems had a chance to commit changes
+ * for both parent and child simultaneously making the
+ * following commit_metadata a noop in many cases.
+ */
+ if (!status)
+ status = nfserrno(commit_metadata(fhp));
+
+ /*
+ * Update the new filehandle to pick up the new attributes.
+ */
+ if (!status)
+ status = fh_update(resfhp);
+
+ return status;
}
/* HPUX client sometimes creates a file in mode 000, and sets size to 0.
@@ -1225,26 +1372,19 @@ nfsd_check_ignore_resizing(struct iattr *iap)
/* The parent directory should already be locked: */
__be32
nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp,
- char *fname, int flen, struct iattr *iap,
- int type, dev_t rdev, struct svc_fh *resfhp)
+ struct nfsd_attrs *attrs,
+ int type, dev_t rdev, struct svc_fh *resfhp)
{
struct dentry *dentry, *dchild;
struct inode *dirp;
+ struct iattr *iap = attrs->na_iattr;
__be32 err;
- __be32 err2;
int host_err;
dentry = fhp->fh_dentry;
dirp = d_inode(dentry);
dchild = dget(resfhp->fh_dentry);
- if (!fhp->fh_locked) {
- WARN_ONCE(1, "nfsd_create: parent %pd2 not locked!\n",
- dentry);
- err = nfserr_io;
- goto out;
- }
-
err = nfsd_permission(rqstp, fhp->fh_export, dentry, NFSD_MAY_CREATE);
if (err)
goto out;
@@ -1257,7 +1397,6 @@ nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp,
iap->ia_mode &= ~current_umask();
err = 0;
- host_err = 0;
switch (type) {
case S_IFREG:
host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
@@ -1303,22 +1442,8 @@ nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp,
if (host_err < 0)
goto out_nfserr;
- err = nfsd_create_setattr(rqstp, resfhp, iap);
+ err = nfsd_create_setattr(rqstp, fhp, resfhp, attrs);
- /*
- * nfsd_create_setattr already committed the child. Transactional
- * filesystems had a chance to commit changes for both parent and
- * child simultaneously making the following commit_metadata a
- * noop.
- */
- err2 = nfserrno(commit_metadata(fhp));
- if (err2)
- err = err2;
- /*
- * Update the file handle to get the new inode info.
- */
- if (!err)
- err = fh_update(resfhp);
out:
dput(dchild);
return err;
@@ -1336,8 +1461,8 @@ nfsd_create_locked(struct svc_rqst *rqstp, struct svc_fh *fhp,
*/
__be32
nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
- char *fname, int flen, struct iattr *iap,
- int type, dev_t rdev, struct svc_fh *resfhp)
+ char *fname, int flen, struct nfsd_attrs *attrs,
+ int type, dev_t rdev, struct svc_fh *resfhp)
{
struct dentry *dentry, *dchild = NULL;
__be32 err;
@@ -1356,11 +1481,13 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
if (host_err)
return nfserrno(host_err);
- fh_lock_nested(fhp, I_MUTEX_PARENT);
+ inode_lock_nested(dentry->d_inode, I_MUTEX_PARENT);
dchild = lookup_one_len(fname, dentry, flen);
host_err = PTR_ERR(dchild);
- if (IS_ERR(dchild))
- return nfserrno(host_err);
+ if (IS_ERR(dchild)) {
+ err = nfserrno(host_err);
+ goto out_unlock;
+ }
err = fh_compose(resfhp, fhp->fh_export, dchild, fhp);
/*
* We unconditionally drop our ref to dchild as fh_compose will have
@@ -1368,178 +1495,14 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
*/
dput(dchild);
if (err)
- return err;
- return nfsd_create_locked(rqstp, fhp, fname, flen, iap, type,
- rdev, resfhp);
-}
-
-#ifdef CONFIG_NFSD_V3
-
-/*
- * NFSv3 and NFSv4 version of nfsd_create
- */
-__be32
-do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
- char *fname, int flen, struct iattr *iap,
- struct svc_fh *resfhp, int createmode, u32 *verifier,
- bool *truncp, bool *created)
-{
- struct dentry *dentry, *dchild = NULL;
- struct inode *dirp;
- __be32 err;
- int host_err;
- __u32 v_mtime=0, v_atime=0;
-
- err = nfserr_perm;
- if (!flen)
- goto out;
- err = nfserr_exist;
- if (isdotent(fname, flen))
- goto out;
- if (!(iap->ia_valid & ATTR_MODE))
- iap->ia_mode = 0;
- err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
- if (err)
- goto out;
-
- dentry = fhp->fh_dentry;
- dirp = d_inode(dentry);
-
- host_err = fh_want_write(fhp);
- if (host_err)
- goto out_nfserr;
-
- fh_lock_nested(fhp, I_MUTEX_PARENT);
-
- /*
- * Compose the response file handle.
- */
- dchild = lookup_one_len(fname, dentry, flen);
- host_err = PTR_ERR(dchild);
- if (IS_ERR(dchild))
- goto out_nfserr;
-
- /* If file doesn't exist, check for permissions to create one */
- if (d_really_is_negative(dchild)) {
- err = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
- if (err)
- goto out;
- }
-
- err = fh_compose(resfhp, fhp->fh_export, dchild, fhp);
- if (err)
- goto out;
-
- if (nfsd_create_is_exclusive(createmode)) {
- /* solaris7 gets confused (bugid 4218508) if these have
- * the high bit set, so just clear the high bits. If this is
- * ever changed to use different attrs for storing the
- * verifier, then do_open_lookup() will also need to be fixed
- * accordingly.
- */
- v_mtime = verifier[0]&0x7fffffff;
- v_atime = verifier[1]&0x7fffffff;
- }
-
- if (d_really_is_positive(dchild)) {
- err = 0;
-
- switch (createmode) {
- case NFS3_CREATE_UNCHECKED:
- if (! d_is_reg(dchild))
- goto out;
- else if (truncp) {
- /* in nfsv4, we need to treat this case a little
- * differently. we don't want to truncate the
- * file now; this would be wrong if the OPEN
- * fails for some other reason. furthermore,
- * if the size is nonzero, we should ignore it
- * according to spec!
- */
- *truncp = (iap->ia_valid & ATTR_SIZE) && !iap->ia_size;
- }
- else {
- iap->ia_valid &= ATTR_SIZE;
- goto set_attr;
- }
- break;
- case NFS3_CREATE_EXCLUSIVE:
- if ( d_inode(dchild)->i_mtime.tv_sec == v_mtime
- && d_inode(dchild)->i_atime.tv_sec == v_atime
- && d_inode(dchild)->i_size == 0 ) {
- if (created)
- *created = true;
- break;
- }
- fallthrough;
- case NFS4_CREATE_EXCLUSIVE4_1:
- if ( d_inode(dchild)->i_mtime.tv_sec == v_mtime
- && d_inode(dchild)->i_atime.tv_sec == v_atime
- && d_inode(dchild)->i_size == 0 ) {
- if (created)
- *created = true;
- goto set_attr;
- }
- fallthrough;
- case NFS3_CREATE_GUARDED:
- err = nfserr_exist;
- }
- fh_drop_write(fhp);
- goto out;
- }
-
- if (!IS_POSIXACL(dirp))
- iap->ia_mode &= ~current_umask();
-
- host_err = vfs_create(dirp, dchild, iap->ia_mode, true);
- if (host_err < 0) {
- fh_drop_write(fhp);
- goto out_nfserr;
- }
- if (created)
- *created = true;
-
- nfsd_check_ignore_resizing(iap);
-
- if (nfsd_create_is_exclusive(createmode)) {
- /* Cram the verifier into atime/mtime */
- iap->ia_valid = ATTR_MTIME|ATTR_ATIME
- | ATTR_MTIME_SET|ATTR_ATIME_SET;
- /* XXX someone who knows this better please fix it for nsec */
- iap->ia_mtime.tv_sec = v_mtime;
- iap->ia_atime.tv_sec = v_atime;
- iap->ia_mtime.tv_nsec = 0;
- iap->ia_atime.tv_nsec = 0;
- }
-
- set_attr:
- err = nfsd_create_setattr(rqstp, resfhp, iap);
-
- /*
- * nfsd_create_setattr already committed the child
- * (and possibly also the parent).
- */
- if (!err)
- err = nfserrno(commit_metadata(fhp));
-
- /*
- * Update the filehandle to get the new inode info.
- */
- if (!err)
- err = fh_update(resfhp);
-
- out:
- fh_unlock(fhp);
- if (dchild && !IS_ERR(dchild))
- dput(dchild);
- fh_drop_write(fhp);
- return err;
-
- out_nfserr:
- err = nfserrno(host_err);
- goto out;
+ goto out_unlock;
+ fh_fill_pre_attrs(fhp);
+ err = nfsd_create_locked(rqstp, fhp, attrs, type, rdev, resfhp);
+ fh_fill_post_attrs(fhp);
+out_unlock:
+ inode_unlock(dentry->d_inode);
+ return err;
}
-#endif /* CONFIG_NFSD_V3 */
/*
* Read a symlink. On entry, *lenp must contain the maximum path length that
@@ -1579,15 +1542,25 @@ nfsd_readlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *buf, int *lenp)
return 0;
}
-/*
- * Create a symlink and look up its inode
+/**
+ * nfsd_symlink - Create a symlink and look up its inode
+ * @rqstp: RPC transaction being executed
+ * @fhp: NFS filehandle of parent directory
+ * @fname: filename of the new symlink
+ * @flen: length of @fname
+ * @path: content of the new symlink (NUL-terminated)
+ * @attrs: requested attributes of new object
+ * @resfhp: NFS filehandle of new object
+ *
* N.B. After this call _both_ fhp and resfhp need an fh_put
+ *
+ * Returns nfs_ok on success, or an nfsstat in network byte order.
*/
__be32
nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
- char *fname, int flen,
- char *path,
- struct svc_fh *resfhp)
+ char *fname, int flen,
+ char *path, struct nfsd_attrs *attrs,
+ struct svc_fh *resfhp)
{
struct dentry *dentry, *dnew;
__be32 err, cerr;
@@ -1605,33 +1578,35 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp,
goto out;
host_err = fh_want_write(fhp);
- if (host_err)
- goto out_nfserr;
+ if (host_err) {
+ err = nfserrno(host_err);
+ goto out;
+ }
- fh_lock(fhp);
dentry = fhp->fh_dentry;
+ inode_lock_nested(dentry->d_inode, I_MUTEX_PARENT);
dnew = lookup_one_len(fname, dentry, flen);
- host_err = PTR_ERR(dnew);
- if (IS_ERR(dnew))
- goto out_nfserr;
-
+ if (IS_ERR(dnew)) {
+ err = nfserrno(PTR_ERR(dnew));
+ inode_unlock(dentry->d_inode);
+ goto out_drop_write;
+ }
+ fh_fill_pre_attrs(fhp);
host_err = vfs_symlink(d_inode(dentry), dnew, path);
err = nfserrno(host_err);
+ cerr = fh_compose(resfhp, fhp->fh_export, dnew, fhp);
+ if (!err)
+ nfsd_create_setattr(rqstp, fhp, resfhp, attrs);
+ fh_fill_post_attrs(fhp);
+ inode_unlock(dentry->d_inode);
if (!err)
err = nfserrno(commit_metadata(fhp));
- fh_unlock(fhp);
-
- fh_drop_write(fhp);
-
- cerr = fh_compose(resfhp, fhp->fh_export, dnew, fhp);
dput(dnew);
if (err==0) err = cerr;
+out_drop_write:
+ fh_drop_write(fhp);
out:
return err;
-
-out_nfserr:
- err = nfserrno(host_err);
- goto out;
}
/*
@@ -1669,21 +1644,25 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
goto out;
}
- fh_lock_nested(ffhp, I_MUTEX_PARENT);
ddir = ffhp->fh_dentry;
dirp = d_inode(ddir);
+ inode_lock_nested(dirp, I_MUTEX_PARENT);
dnew = lookup_one_len(name, ddir, len);
- host_err = PTR_ERR(dnew);
- if (IS_ERR(dnew))
- goto out_nfserr;
+ if (IS_ERR(dnew)) {
+ err = nfserrno(PTR_ERR(dnew));
+ goto out_unlock;
+ }
dold = tfhp->fh_dentry;
err = nfserr_noent;
if (d_really_is_negative(dold))
goto out_dput;
+ fh_fill_pre_attrs(ffhp);
host_err = vfs_link(dold, dirp, dnew, NULL);
+ fh_fill_post_attrs(ffhp);
+ inode_unlock(dirp);
if (!host_err) {
err = nfserrno(commit_metadata(ffhp));
if (!err)
@@ -1694,17 +1673,17 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
else
err = nfserrno(host_err);
}
-out_dput:
dput(dnew);
-out_unlock:
- fh_unlock(ffhp);
+out_drop_write:
fh_drop_write(tfhp);
out:
return err;
-out_nfserr:
- err = nfserrno(host_err);
- goto out_unlock;
+out_dput:
+ dput(dnew);
+out_unlock:
+ inode_unlock(dirp);
+ goto out_drop_write;
}
static void
@@ -1739,7 +1718,7 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
struct inode *fdir, *tdir;
__be32 err;
int host_err;
- bool has_cached = false;
+ bool close_cached = false;
err = fh_verify(rqstp, ffhp, S_IFDIR, NFSD_MAY_REMOVE);
if (err)
@@ -1771,12 +1750,9 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
goto out;
}
- /* cannot use fh_lock as we need deadlock protective ordering
- * so do it by hand */
trap = lock_rename(tdentry, fdentry);
- ffhp->fh_locked = tfhp->fh_locked = true;
- fill_pre_wcc(ffhp);
- fill_pre_wcc(tfhp);
+ fh_fill_pre_attrs(ffhp);
+ fh_fill_pre_attrs(tfhp);
odentry = lookup_one_len(fname, fdentry, flen);
host_err = PTR_ERR(odentry);
@@ -1798,11 +1774,26 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
if (ndentry == trap)
goto out_dput_new;
- if (nfsd_has_cached_files(ndentry)) {
- has_cached = true;
+ if ((ndentry->d_sb->s_export_op->flags & EXPORT_OP_CLOSE_BEFORE_UNLINK) &&
+ nfsd_has_cached_files(ndentry)) {
+ close_cached = true;
goto out_dput_old;
} else {
- host_err = vfs_rename(fdir, odentry, tdir, ndentry, NULL, 0);
+ struct renamedata rd = {
+ .old_dir = fdir,
+ .old_dentry = odentry,
+ .new_dir = tdir,
+ .new_dentry = ndentry,
+ };
+ int retries;
+
+ for (retries = 1;;) {
+ host_err = vfs_rename(&rd);
+ if (host_err != -EAGAIN || !retries--)
+ break;
+ if (!nfsd_wait_for_delegreturn(rqstp, d_inode(odentry)))
+ break;
+ }
if (!host_err) {
host_err = commit_metadata(tfhp);
if (!host_err)
@@ -1815,17 +1806,12 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
dput(odentry);
out_nfserr:
err = nfserrno(host_err);
- /*
- * We cannot rely on fh_unlock on the two filehandles,
- * as that would do the wrong thing if the two directories
- * were the same, so again we do it by hand.
- */
- if (!has_cached) {
- fill_post_wcc(ffhp);
- fill_post_wcc(tfhp);
+
+ if (!close_cached) {
+ fh_fill_post_attrs(ffhp);
+ fh_fill_post_attrs(tfhp);
}
unlock_rename(tdentry, fdentry);
- ffhp->fh_locked = tfhp->fh_locked = false;
fh_drop_write(ffhp);
/*
@@ -1834,8 +1820,8 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
* shouldn't be done with locks held however, so we delay it until this
* point and then reattempt the whole shebang.
*/
- if (has_cached) {
- has_cached = false;
+ if (close_cached) {
+ close_cached = false;
nfsd_close_cached_files(ndentry);
dput(ndentry);
goto retry;
@@ -1854,6 +1840,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
{
struct dentry *dentry, *rdentry;
struct inode *dirp;
+ struct inode *rinode;
__be32 err;
int host_err;
@@ -1868,34 +1855,50 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
if (host_err)
goto out_nfserr;
- fh_lock_nested(fhp, I_MUTEX_PARENT);
dentry = fhp->fh_dentry;
dirp = d_inode(dentry);
+ inode_lock_nested(dirp, I_MUTEX_PARENT);
rdentry = lookup_one_len(fname, dentry, flen);
host_err = PTR_ERR(rdentry);
if (IS_ERR(rdentry))
- goto out_drop_write;
+ goto out_unlock;
if (d_really_is_negative(rdentry)) {
dput(rdentry);
host_err = -ENOENT;
- goto out_drop_write;
+ goto out_unlock;
}
+ rinode = d_inode(rdentry);
+ ihold(rinode);
if (!type)
type = d_inode(rdentry)->i_mode & S_IFMT;
+ fh_fill_pre_attrs(fhp);
if (type != S_IFDIR) {
- nfsd_close_cached_files(rdentry);
- host_err = vfs_unlink(dirp, rdentry, NULL);
+ int retries;
+
+ if (rdentry->d_sb->s_export_op->flags & EXPORT_OP_CLOSE_BEFORE_UNLINK)
+ nfsd_close_cached_files(rdentry);
+
+ for (retries = 1;;) {
+ host_err = vfs_unlink(dirp, rdentry, NULL);
+ if (host_err != -EAGAIN || !retries--)
+ break;
+ if (!nfsd_wait_for_delegreturn(rqstp, rinode))
+ break;
+ }
} else {
host_err = vfs_rmdir(dirp, rdentry);
}
+ fh_fill_post_attrs(fhp);
+ inode_unlock(dirp);
if (!host_err)
host_err = commit_metadata(fhp);
dput(rdentry);
+ iput(rinode); /* truncate the inode here */
out_drop_write:
fh_drop_write(fhp);
@@ -1913,6 +1916,9 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
}
out:
return err;
+out_unlock:
+ inode_unlock(dirp);
+ goto out_drop_write;
}
/*
@@ -1962,8 +1968,9 @@ static int nfsd_buffered_filldir(struct dir_context *ctx, const char *name,
return 0;
}
-static __be32 nfsd_buffered_readdir(struct file *file, nfsd_filldir_t func,
- struct readdir_cd *cdp, loff_t *offsetp)
+static __be32 nfsd_buffered_readdir(struct file *file, struct svc_fh *fhp,
+ nfsd_filldir_t func, struct readdir_cd *cdp,
+ loff_t *offsetp)
{
struct buffered_dirent *de;
int host_err;
@@ -2009,6 +2016,8 @@ static __be32 nfsd_buffered_readdir(struct file *file, nfsd_filldir_t func,
if (cdp->err != nfs_ok)
break;
+ trace_nfsd_dirent(fhp, de->ino, de->name, de->namlen);
+
reclen = ALIGN(sizeof(*de) + de->namlen,
sizeof(u64));
size -= reclen;
@@ -2056,7 +2065,7 @@ nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp,
goto out_close;
}
- err = nfsd_buffered_readdir(file, func, cdp, offsetp);
+ err = nfsd_buffered_readdir(file, fhp, func, cdp, offsetp);
if (err == nfserr_eof || err == nfserr_toosmall)
err = nfs_ok; /* can still be found in ->err */
@@ -2263,13 +2272,16 @@ nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char **bufp,
return err;
}
-/*
- * Removexattr and setxattr need to call fh_lock to both lock the inode
- * and set the change attribute. Since the top-level vfs_removexattr
- * and vfs_setxattr calls already do their own inode_lock calls, call
- * the _locked variant. Pass in a NULL pointer for delegated_inode,
- * and let the client deal with NFS4ERR_DELAY (same as with e.g.
- * setattr and remove).
+/**
+ * nfsd_removexattr - Remove an extended attribute
+ * @rqstp: RPC transaction being executed
+ * @fhp: NFS filehandle of object with xattr to remove
+ * @name: name of xattr to remove (NUL-terminate)
+ *
+ * Pass in a NULL pointer for delegated_inode, and let the client deal
+ * with NFS4ERR_DELAY (same as with e.g. setattr and remove).
+ *
+ * Returns nfs_ok on success, or an nfsstat in network byte order.
*/
__be32
nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char *name)
@@ -2285,11 +2297,13 @@ nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char *name)
if (ret)
return nfserrno(ret);
- fh_lock(fhp);
+ inode_lock(fhp->fh_dentry->d_inode);
+ fh_fill_pre_attrs(fhp);
ret = __vfs_removexattr_locked(fhp->fh_dentry, name, NULL);
- fh_unlock(fhp);
+ fh_fill_post_attrs(fhp);
+ inode_unlock(fhp->fh_dentry->d_inode);
fh_drop_write(fhp);
return nfsd_xattr_errno(ret);
@@ -2309,12 +2323,13 @@ nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, char *name,
ret = fh_want_write(fhp);
if (ret)
return nfserrno(ret);
- fh_lock(fhp);
+ inode_lock(fhp->fh_dentry->d_inode);
+ fh_fill_pre_attrs(fhp);
ret = __vfs_setxattr_locked(fhp->fh_dentry, name, buf, len, flags,
NULL);
-
- fh_unlock(fhp);
+ fh_fill_post_attrs(fhp);
+ inode_unlock(fhp->fh_dentry->d_inode);
fh_drop_write(fhp);
return nfsd_xattr_errno(ret);
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index a2442ebe5acf..dbdfef7ae85b 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -6,6 +6,8 @@
#ifndef LINUX_NFSD_VFS_H
#define LINUX_NFSD_VFS_H
+#include <linux/fs.h>
+#include <linux/posix_acl.h>
#include "nfsfh.h"
#include "nfsd.h"
@@ -42,6 +44,23 @@ struct nfsd_file;
typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
/* nfsd/vfs.c */
+struct nfsd_attrs {
+ struct iattr *na_iattr; /* input */
+ struct xdr_netobj *na_seclabel; /* input */
+ struct posix_acl *na_pacl; /* input */
+ struct posix_acl *na_dpacl; /* input */
+
+ int na_labelerr; /* output */
+ int na_aclerr; /* output */
+};
+
+static inline void nfsd_attrs_free(struct nfsd_attrs *attrs)
+{
+ posix_acl_release(attrs->na_pacl);
+ posix_acl_release(attrs->na_dpacl);
+}
+
+__be32 nfserrno (int errno);
int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
struct svc_export **expp);
__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *,
@@ -50,32 +69,28 @@ __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
const char *, unsigned int,
struct svc_export **, struct dentry **);
__be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *,
- struct iattr *, int, time64_t);
+ struct nfsd_attrs *, int, time64_t);
int nfsd_mountpoint(struct dentry *, struct svc_export *);
#ifdef CONFIG_NFSD_V4
-__be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
- struct xdr_netobj *);
__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
struct file *, loff_t, loff_t, int);
-__be32 nfsd4_clone_file_range(struct nfsd_file *nf_src, u64 src_pos,
+__be32 nfsd4_clone_file_range(struct svc_rqst *rqstp,
+ struct nfsd_file *nf_src, u64 src_pos,
struct nfsd_file *nf_dst, u64 dst_pos,
u64 count, bool sync);
#endif /* CONFIG_NFSD_V4 */
__be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *,
- char *name, int len, struct iattr *attrs,
- int type, dev_t rdev, struct svc_fh *res);
+ struct nfsd_attrs *attrs, int type, dev_t rdev,
+ struct svc_fh *res);
__be32 nfsd_create(struct svc_rqst *, struct svc_fh *,
- char *name, int len, struct iattr *attrs,
+ char *name, int len, struct nfsd_attrs *attrs,
int type, dev_t rdev, struct svc_fh *res);
-#ifdef CONFIG_NFSD_V3
__be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
-__be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *,
- char *name, int len, struct iattr *attrs,
- struct svc_fh *res, int createmode,
- u32 *verifier, bool *truncp, bool *created);
-__be32 nfsd_commit(struct svc_rqst *, struct svc_fh *,
- loff_t, unsigned long, __be32 *verf);
-#endif /* CONFIG_NFSD_V3 */
+__be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
+ struct svc_fh *resfhp, struct nfsd_attrs *iap);
+__be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp,
+ struct nfsd_file *nf, u64 offset, u32 count,
+ __be32 *verf);
#ifdef CONFIG_NFSD_V4
__be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
char *name, void **bufp, int *lenp);
@@ -89,7 +104,7 @@ __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp,
int nfsd_open_break_lease(struct inode *, int);
__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
int, struct file **);
-__be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t,
+__be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *,
int, struct file **);
__be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct file *file, loff_t offset,
@@ -113,8 +128,9 @@ __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *,
char *, int *);
__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *,
- char *name, int len, char *path,
- struct svc_fh *res);
+ char *name, int len, char *path,
+ struct nfsd_attrs *attrs,
+ struct svc_fh *res);
__be32 nfsd_link(struct svc_rqst *, struct svc_fh *,
char *, int, struct svc_fh *);
ssize_t nfsd_copy_file_range(struct file *, u64,
@@ -152,7 +168,7 @@ static inline void fh_drop_write(struct svc_fh *fh)
}
}
-static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
+static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat)
{
struct path p = {.mnt = fh->fh_export->ex_path.mnt,
.dentry = fh->fh_dentry};
@@ -160,10 +176,4 @@ static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
AT_STATX_SYNC_AS_STAT));
}
-static inline int nfsd_create_is_exclusive(int createmode)
-{
- return createmode == NFS3_CREATE_EXCLUSIVE
- || createmode == NFS4_CREATE_EXCLUSIVE4_1;
-}
-
#endif /* LINUX_NFSD_VFS_H */
diff --git a/fs/nfsd/xdr.h b/fs/nfsd/xdr.h
index b8cc6a4b2e0e..852f71580bd0 100644
--- a/fs/nfsd/xdr.h
+++ b/fs/nfsd/xdr.h
@@ -27,14 +27,13 @@ struct nfsd_readargs {
struct svc_fh fh;
__u32 offset;
__u32 count;
- int vlen;
};
struct nfsd_writeargs {
svc_fh fh;
__u32 offset;
__u32 len;
- struct kvec first;
+ struct xdr_buf payload;
};
struct nfsd_createargs {
@@ -53,11 +52,6 @@ struct nfsd_renameargs {
unsigned int tlen;
};
-struct nfsd_readlinkargs {
- struct svc_fh fh;
- char * buffer;
-};
-
struct nfsd_linkargs {
struct svc_fh ffh;
struct svc_fh tfh;
@@ -79,7 +73,6 @@ struct nfsd_readdirargs {
struct svc_fh fh;
__u32 cookie;
__u32 count;
- __be32 * buffer;
};
struct nfsd_stat {
@@ -101,6 +94,7 @@ struct nfsd_diropres {
struct nfsd_readlinkres {
__be32 status;
int len;
+ struct page *page;
};
struct nfsd_readres {
@@ -108,17 +102,20 @@ struct nfsd_readres {
struct svc_fh fh;
unsigned long count;
struct kstat stat;
+ struct page **pages;
};
struct nfsd_readdirres {
+ /* Components of the reply */
__be32 status;
int count;
+ /* Used to encode the reply's entry list */
+ struct xdr_stream xdr;
+ struct xdr_buf dirlist;
struct readdir_cd common;
- __be32 * buffer;
- int buflen;
- __be32 * offset;
+ unsigned int cookie_offset;
};
struct nfsd_statfsres {
@@ -144,36 +141,37 @@ union nfsd_xdrstore {
#define NFS2_SVC_XDRSIZE sizeof(union nfsd_xdrstore)
-int nfssvc_decode_void(struct svc_rqst *, __be32 *);
-int nfssvc_decode_fhandle(struct svc_rqst *, __be32 *);
-int nfssvc_decode_sattrargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_diropargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_readargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_writeargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_createargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_renameargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_readlinkargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *);
-int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *);
-int nfssvc_encode_void(struct svc_rqst *, __be32 *);
-int nfssvc_encode_stat(struct svc_rqst *, __be32 *);
-int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *);
-int nfssvc_encode_diropres(struct svc_rqst *, __be32 *);
-int nfssvc_encode_readlinkres(struct svc_rqst *, __be32 *);
-int nfssvc_encode_readres(struct svc_rqst *, __be32 *);
-int nfssvc_encode_statfsres(struct svc_rqst *, __be32 *);
-int nfssvc_encode_readdirres(struct svc_rqst *, __be32 *);
-
-int nfssvc_encode_entry(void *, const char *name,
- int namlen, loff_t offset, u64 ino, unsigned int);
+bool nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+
+bool nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+
+void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset);
+int nfssvc_encode_entry(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type);
void nfssvc_release_attrstat(struct svc_rqst *rqstp);
void nfssvc_release_diropres(struct svc_rqst *rqstp);
void nfssvc_release_readres(struct svc_rqst *rqstp);
/* Helper functions for NFSv2 ACL code */
-__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, struct kstat *stat);
-__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp);
+bool svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp);
+bool svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status);
+bool svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp, const struct kstat *stat);
#endif /* LINUX_NFSD_H */
diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h
index ae6fa6c9cb46..03fe4e21306c 100644
--- a/fs/nfsd/xdr3.h
+++ b/fs/nfsd/xdr3.h
@@ -25,14 +25,13 @@ struct nfsd3_diropargs {
struct nfsd3_accessargs {
struct svc_fh fh;
- unsigned int access;
+ __u32 access;
};
struct nfsd3_readargs {
struct svc_fh fh;
__u64 offset;
__u32 count;
- int vlen;
};
struct nfsd3_writeargs {
@@ -41,7 +40,7 @@ struct nfsd3_writeargs {
__u32 count;
int stable;
__u32 len;
- struct kvec first;
+ struct xdr_buf payload;
};
struct nfsd3_createargs {
@@ -71,11 +70,6 @@ struct nfsd3_renameargs {
unsigned int tlen;
};
-struct nfsd3_readlinkargs {
- struct svc_fh fh;
- char * buffer;
-};
-
struct nfsd3_linkargs {
struct svc_fh ffh;
struct svc_fh tfh;
@@ -96,10 +90,8 @@ struct nfsd3_symlinkargs {
struct nfsd3_readdirargs {
struct svc_fh fh;
__u64 cookie;
- __u32 dircount;
__u32 count;
__be32 * verf;
- __be32 * buffer;
};
struct nfsd3_commitargs {
@@ -110,13 +102,13 @@ struct nfsd3_commitargs {
struct nfsd3_getaclargs {
struct svc_fh fh;
- int mask;
+ __u32 mask;
};
struct posix_acl;
struct nfsd3_setaclargs {
struct svc_fh fh;
- int mask;
+ __u32 mask;
struct posix_acl *acl_access;
struct posix_acl *acl_default;
};
@@ -145,6 +137,7 @@ struct nfsd3_readlinkres {
__be32 status;
struct svc_fh fh;
__u32 len;
+ struct page **pages;
};
struct nfsd3_readres {
@@ -152,6 +145,7 @@ struct nfsd3_readres {
struct svc_fh fh;
unsigned long count;
__u32 eof;
+ struct page **pages;
};
struct nfsd3_writeres {
@@ -175,19 +169,17 @@ struct nfsd3_linkres {
};
struct nfsd3_readdirres {
+ /* Components of the reply */
__be32 status;
struct svc_fh fh;
- /* Just to save kmalloc on every readdirplus entry (svc_fh is a
- * little large for the stack): */
- struct svc_fh scratch;
- int count;
__be32 verf[2];
+ /* Used to encode the reply's entry list */
+ struct xdr_stream xdr;
+ struct xdr_buf dirlist;
+ struct svc_fh scratch;
struct readdir_cd common;
- __be32 * buffer;
- int buflen;
- __be32 * offset;
- __be32 * offset1;
+ unsigned int cookie_offset;
struct svc_rqst * rqstp;
};
@@ -273,52 +265,50 @@ union nfsd3_xdrstore {
#define NFS3_SVC_XDRSIZE sizeof(union nfsd3_xdrstore)
-int nfs3svc_decode_voidarg(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_fhandle(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_sattrargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_diropargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_accessargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_readargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_writeargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_createargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_mkdirargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_mknodargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_renameargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_readlinkargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_linkargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_symlinkargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_readdirargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_readdirplusargs(struct svc_rqst *, __be32 *);
-int nfs3svc_decode_commitargs(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_voidres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_attrstat(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_wccstat(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_diropres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_accessres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_readlinkres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_readres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_writeres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_createres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_renameres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_linkres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_readdirres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_fsstatres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_fsinfores(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_pathconfres(struct svc_rqst *, __be32 *);
-int nfs3svc_encode_commitres(struct svc_rqst *, __be32 *);
+bool nfs3svc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_accessargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_decode_commitargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+
+bool nfs3svc_encode_getattrres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_wccstat(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_lookupres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_accessres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_writeres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_createres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_renameres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_linkres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs3svc_encode_commitres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
void nfs3svc_release_fhandle(struct svc_rqst *);
void nfs3svc_release_fhandle2(struct svc_rqst *);
-int nfs3svc_encode_entry(void *, const char *name,
- int namlen, loff_t offset, u64 ino,
- unsigned int);
-int nfs3svc_encode_entry_plus(void *, const char *name,
- int namlen, loff_t offset, u64 ino,
- unsigned int);
-/* Helper functions for NFSv3 ACL code */
-__be32 *nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p,
- struct svc_fh *fhp);
-__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp);
+void nfs3svc_encode_cookie3(struct nfsd3_readdirres *resp, u64 offset);
+int nfs3svc_encode_entry3(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type);
+int nfs3svc_encode_entryplus3(void *data, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type);
+/* Helper functions for NFSv3 ACL code */
+bool svcxdr_decode_nfs_fh3(struct xdr_stream *xdr, struct svc_fh *fhp);
+bool svcxdr_encode_nfsstat3(struct xdr_stream *xdr, __be32 status);
+bool svcxdr_encode_post_op_attr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
+ const struct svc_fh *fhp);
#endif /* _LINUX_NFSD_XDR3_H */
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 679d40af1bbb..a034b9b62137 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -76,12 +76,7 @@ static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
struct nfsd4_change_info {
u32 atomic;
- bool change_supported;
- u32 before_ctime_sec;
- u32 before_ctime_nsec;
u64 before_change;
- u32 after_ctime_sec;
- u32 after_ctime_nsec;
u64 after_change;
};
@@ -252,7 +247,8 @@ struct nfsd4_listxattrs {
struct nfsd4_open {
u32 op_claim_type; /* request */
- struct xdr_netobj op_fname; /* request - everything but CLAIM_PREV */
+ u32 op_fnamelen;
+ char * op_fname; /* request - everything but CLAIM_PREV */
u32 op_delegate_type; /* request - CLAIM_PREV only */
stateid_t op_delegate_stateid; /* request - response */
u32 op_why_no_deleg; /* response - DELEG_NONE_EXT only */
@@ -277,11 +273,13 @@ struct nfsd4_open {
bool op_truncate; /* used during processing */
bool op_created; /* used during processing */
struct nfs4_openowner *op_openowner; /* used during processing */
+ struct file *op_filp; /* used during processing */
struct nfs4_file *op_file; /* used during processing */
struct nfs4_ol_stateid *op_stp; /* used during processing */
struct nfs4_clnt_odstate *op_odstate; /* used during processing */
struct nfs4_acl *op_acl;
struct xdr_netobj op_label;
+ struct svc_rqst *op_rqstp;
};
struct nfsd4_open_confirm {
@@ -305,9 +303,10 @@ struct nfsd4_read {
u32 rd_length; /* request */
int rd_vlen;
struct nfsd_file *rd_nf;
-
+
struct svc_rqst *rd_rqstp; /* response */
- struct svc_fh *rd_fhp; /* response */
+ struct svc_fh *rd_fhp; /* response */
+ u32 rd_eof; /* response */
};
struct nfsd4_readdir {
@@ -385,13 +384,6 @@ struct nfsd4_setclientid_confirm {
nfs4_verifier sc_confirm;
};
-struct nfsd4_saved_compoundargs {
- __be32 *p;
- __be32 *end;
- int pagelen;
- struct page **pagelist;
-};
-
struct nfsd4_test_stateid_id {
__be32 ts_id_status;
stateid_t ts_id_stateid;
@@ -419,8 +411,7 @@ struct nfsd4_write {
u64 wr_offset; /* request */
u32 wr_stable_how; /* request */
u32 wr_buflen; /* request */
- struct kvec wr_head;
- struct page ** wr_pagelist; /* request */
+ struct xdr_buf wr_payload; /* request */
u32 wr_bytes_written; /* response */
u32 wr_how_written; /* response */
@@ -433,7 +424,7 @@ struct nfsd4_exchange_id {
u32 flags;
clientid_t clientid;
u32 seqid;
- int spa_how;
+ u32 spa_how;
u32 spo_must_enforce[3];
u32 spo_must_allow[3];
struct xdr_netobj nii_domain;
@@ -543,6 +534,13 @@ struct nfsd42_write_res {
stateid_t cb_stateid;
};
+struct nfsd4_cb_offload {
+ struct nfsd4_callback co_cb;
+ struct nfsd42_write_res co_res;
+ __be32 co_nfserr;
+ struct knfsd_fh co_fh;
+};
+
struct nfsd4_copy {
/* request */
stateid_t cp_src_stateid;
@@ -550,18 +548,16 @@ struct nfsd4_copy {
u64 cp_src_pos;
u64 cp_dst_pos;
u64 cp_count;
- struct nl4_server cp_src;
- bool cp_intra;
+ struct nl4_server *cp_src;
- /* both */
- bool cp_synchronous;
+ unsigned long cp_flags;
+#define NFSD4_COPY_F_STOPPED (0)
+#define NFSD4_COPY_F_INTRA (1)
+#define NFSD4_COPY_F_SYNCHRONOUS (2)
+#define NFSD4_COPY_F_COMMITTED (3)
/* response */
struct nfsd42_write_res cp_res;
-
- /* for cb_offload */
- struct nfsd4_callback cp_cb;
- __be32 nfserr;
struct knfsd_fh fh;
struct nfs4_client *cp_clp;
@@ -574,13 +570,34 @@ struct nfsd4_copy {
struct list_head copies;
struct task_struct *copy_task;
refcount_t refcount;
- bool stopped;
- struct vfsmount *ss_mnt;
+ struct nfsd4_ssc_umount_item *ss_nsui;
struct nfs_fh c_fh;
nfs4_stateid stateid;
};
-extern bool inter_copy_offload_enable;
+
+static inline void nfsd4_copy_set_sync(struct nfsd4_copy *copy, bool sync)
+{
+ if (sync)
+ set_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
+ else
+ clear_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
+}
+
+static inline bool nfsd4_copy_is_sync(const struct nfsd4_copy *copy)
+{
+ return test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
+}
+
+static inline bool nfsd4_copy_is_async(const struct nfsd4_copy *copy)
+{
+ return !test_bit(NFSD4_COPY_F_SYNCHRONOUS, ©->cp_flags);
+}
+
+static inline bool nfsd4_ssc_is_inter(const struct nfsd4_copy *copy)
+{
+ return !test_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
+}
struct nfsd4_seek {
/* request */
@@ -605,19 +622,20 @@ struct nfsd4_offload_status {
struct nfsd4_copy_notify {
/* request */
stateid_t cpn_src_stateid;
- struct nl4_server cpn_dst;
+ struct nl4_server *cpn_dst;
/* response */
stateid_t cpn_cnr_stateid;
u64 cpn_sec;
u32 cpn_nsec;
- struct nl4_server cpn_src;
+ struct nl4_server *cpn_src;
};
struct nfsd4_op {
- int opnum;
- const struct nfsd4_operation * opdesc;
+ u32 opnum;
__be32 status;
+ const struct nfsd4_operation *opdesc;
+ struct nfs4_replay *replay;
union nfsd4_op_u {
struct nfsd4_access access;
struct nfsd4_close close;
@@ -681,7 +699,6 @@ struct nfsd4_op {
struct nfsd4_listxattrs listxattrs;
struct nfsd4_removexattr removexattr;
} u;
- struct nfs4_replay * replay;
};
bool nfsd4_cache_this_op(struct nfsd4_op *);
@@ -696,35 +713,29 @@ struct svcxdr_tmpbuf {
struct nfsd4_compoundargs {
/* scratch variables for XDR decode */
- __be32 * p;
- __be32 * end;
- struct page ** pagelist;
- int pagelen;
- bool tail;
- __be32 tmp[8];
- __be32 * tmpp;
+ struct xdr_stream *xdr;
struct svcxdr_tmpbuf *to_free;
-
struct svc_rqst *rqstp;
- u32 taglen;
char * tag;
+ u32 taglen;
u32 minorversion;
+ u32 client_opcnt;
u32 opcnt;
struct nfsd4_op *ops;
struct nfsd4_op iops[8];
- int cachetype;
};
struct nfsd4_compoundres {
/* scratch variables for XDR encode */
- struct xdr_stream xdr;
+ struct xdr_stream *xdr;
struct svc_rqst * rqstp;
- u32 taglen;
+ __be32 *statusp;
char * tag;
+ u32 taglen;
u32 opcnt;
- __be32 * tagp; /* tag, opcount encode location */
+
struct nfsd4_compound_state cstate;
};
@@ -767,24 +778,16 @@ static inline void
set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
{
BUG_ON(!fhp->fh_pre_saved);
- cinfo->atomic = (u32)fhp->fh_post_saved;
- cinfo->change_supported = IS_I_VERSION(d_inode(fhp->fh_dentry));
+ cinfo->atomic = (u32)(fhp->fh_post_saved && !fhp->fh_no_atomic_attr);
cinfo->before_change = fhp->fh_pre_change;
cinfo->after_change = fhp->fh_post_change;
- cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
- cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
- cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
- cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;
-
}
bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);
-int nfs4svc_decode_voidarg(struct svc_rqst *, __be32 *);
-int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *);
-int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *);
-int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *);
+bool nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op);
@@ -885,13 +888,19 @@ struct nfsd4_operation {
u32 op_flags;
char *op_name;
/* Try to get response size before operation */
- u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
+ u32 (*op_rsize_bop)(const struct svc_rqst *rqstp,
+ const struct nfsd4_op *op);
void (*op_get_currentstateid)(struct nfsd4_compound_state *,
union nfsd4_op_u *);
void (*op_set_currentstateid)(struct nfsd4_compound_state *,
union nfsd4_op_u *);
};
+struct nfsd4_cb_recall_any {
+ struct nfsd4_callback ra_cb;
+ u32 ra_keep;
+ u32 ra_bmval[1];
+};
#endif
diff --git a/fs/nfsd/xdr4cb.h b/fs/nfsd/xdr4cb.h
index 547cf07cf4e0..0d39af1b00a0 100644
--- a/fs/nfsd/xdr4cb.h
+++ b/fs/nfsd/xdr4cb.h
@@ -48,3 +48,9 @@
#define NFS4_dec_cb_offload_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)
+#define NFS4_enc_cb_recall_any_sz (cb_compound_enc_hdr_sz + \
+ cb_sequence_enc_sz + \
+ 1 + 1 + 1)
+#define NFS4_dec_cb_recall_any_sz (cb_compound_dec_hdr_sz + \
+ cb_sequence_dec_sz + \
+ op_dec_sz)
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index e45ca6ecba95..fa81c59a2ad4 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -150,7 +150,7 @@ void dnotify_flush(struct file *filp, fl_owner_t id)
return;
dn_mark = container_of(fsn_mark, struct dnotify_mark, fsn_mark);
- mutex_lock(&dnotify_group->mark_mutex);
+ fsnotify_group_lock(dnotify_group);
spin_lock(&fsn_mark->lock);
prev = &dn_mark->dn;
@@ -173,7 +173,7 @@ void dnotify_flush(struct file *filp, fl_owner_t id)
free = true;
}
- mutex_unlock(&dnotify_group->mark_mutex);
+ fsnotify_group_unlock(dnotify_group);
if (free)
fsnotify_free_mark(fsn_mark);
@@ -196,7 +196,7 @@ static __u32 convert_arg(unsigned long arg)
if (arg & DN_ATTRIB)
new_mask |= FS_ATTRIB;
if (arg & DN_RENAME)
- new_mask |= FS_DN_RENAME;
+ new_mask |= FS_RENAME;
if (arg & DN_CREATE)
new_mask |= (FS_CREATE | FS_MOVED_TO);
@@ -306,7 +306,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
new_dn_mark->dn = NULL;
/* this is needed to prevent the fcntl/close race described below */
- mutex_lock(&dnotify_group->mark_mutex);
+ fsnotify_group_lock(dnotify_group);
/* add the new_fsn_mark or find an old one. */
fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, dnotify_group);
@@ -316,7 +316,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
} else {
error = fsnotify_add_inode_mark_locked(new_fsn_mark, inode, 0);
if (error) {
- mutex_unlock(&dnotify_group->mark_mutex);
+ fsnotify_group_unlock(dnotify_group);
goto out_err;
}
spin_lock(&new_fsn_mark->lock);
@@ -327,7 +327,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
}
rcu_read_lock();
- f = fcheck(fd);
+ f = lookup_fd_rcu(fd);
rcu_read_unlock();
/* if (f != filp) means that we lost a race and another task/thread
@@ -365,7 +365,7 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
if (destroy)
fsnotify_detach_mark(fsn_mark);
- mutex_unlock(&dnotify_group->mark_mutex);
+ fsnotify_group_unlock(dnotify_group);
if (destroy)
fsnotify_free_mark(fsn_mark);
fsnotify_put_mark(fsn_mark);
@@ -383,7 +383,8 @@ static int __init dnotify_init(void)
SLAB_PANIC|SLAB_ACCOUNT);
dnotify_mark_cache = KMEM_CACHE(dnotify_mark, SLAB_PANIC|SLAB_ACCOUNT);
- dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops);
+ dnotify_group = fsnotify_alloc_group(&dnotify_fsnotify_ops,
+ FSNOTIFY_GROUP_NOFS);
if (IS_ERR(dnotify_group))
panic("unable to allocate fsnotify group for dnotify\n");
return 0;
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index c3af99e94f1d..a2a15bc4df28 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -14,20 +14,33 @@
#include <linux/audit.h>
#include <linux/sched/mm.h>
#include <linux/statfs.h>
+#include <linux/stringhash.h>
#include "fanotify.h"
-static bool fanotify_path_equal(struct path *p1, struct path *p2)
+static bool fanotify_path_equal(const struct path *p1, const struct path *p2)
{
return p1->mnt == p2->mnt && p1->dentry == p2->dentry;
}
+static unsigned int fanotify_hash_path(const struct path *path)
+{
+ return hash_ptr(path->dentry, FANOTIFY_EVENT_HASH_BITS) ^
+ hash_ptr(path->mnt, FANOTIFY_EVENT_HASH_BITS);
+}
+
static inline bool fanotify_fsid_equal(__kernel_fsid_t *fsid1,
__kernel_fsid_t *fsid2)
{
return fsid1->val[0] == fsid2->val[0] && fsid1->val[1] == fsid2->val[1];
}
+static unsigned int fanotify_hash_fsid(__kernel_fsid_t *fsid)
+{
+ return hash_32(fsid->val[0], FANOTIFY_EVENT_HASH_BITS) ^
+ hash_32(fsid->val[1], FANOTIFY_EVENT_HASH_BITS);
+}
+
static bool fanotify_fh_equal(struct fanotify_fh *fh1,
struct fanotify_fh *fh2)
{
@@ -38,6 +51,16 @@ static bool fanotify_fh_equal(struct fanotify_fh *fh1,
!memcmp(fanotify_fh_buf(fh1), fanotify_fh_buf(fh2), fh1->len);
}
+static unsigned int fanotify_hash_fh(struct fanotify_fh *fh)
+{
+ long salt = (long)fh->type | (long)fh->len << 8;
+
+ /*
+ * full_name_hash() works long by long, so it handles fh buf optimally.
+ */
+ return full_name_hash((void *)salt, fanotify_fh_buf(fh), fh->len);
+}
+
static bool fanotify_fid_event_equal(struct fanotify_fid_event *ffe1,
struct fanotify_fid_event *ffe2)
{
@@ -53,8 +76,10 @@ static bool fanotify_info_equal(struct fanotify_info *info1,
struct fanotify_info *info2)
{
if (info1->dir_fh_totlen != info2->dir_fh_totlen ||
+ info1->dir2_fh_totlen != info2->dir2_fh_totlen ||
info1->file_fh_totlen != info2->file_fh_totlen ||
- info1->name_len != info2->name_len)
+ info1->name_len != info2->name_len ||
+ info1->name2_len != info2->name2_len)
return false;
if (info1->dir_fh_totlen &&
@@ -62,14 +87,24 @@ static bool fanotify_info_equal(struct fanotify_info *info1,
fanotify_info_dir_fh(info2)))
return false;
+ if (info1->dir2_fh_totlen &&
+ !fanotify_fh_equal(fanotify_info_dir2_fh(info1),
+ fanotify_info_dir2_fh(info2)))
+ return false;
+
if (info1->file_fh_totlen &&
!fanotify_fh_equal(fanotify_info_file_fh(info1),
fanotify_info_file_fh(info2)))
return false;
- return !info1->name_len ||
- !memcmp(fanotify_info_name(info1), fanotify_info_name(info2),
- info1->name_len);
+ if (info1->name_len &&
+ memcmp(fanotify_info_name(info1), fanotify_info_name(info2),
+ info1->name_len))
+ return false;
+
+ return !info1->name2_len ||
+ !memcmp(fanotify_info_name2(info1), fanotify_info_name2(info2),
+ info1->name2_len);
}
static bool fanotify_name_event_equal(struct fanotify_name_event *fne1,
@@ -88,16 +123,22 @@ static bool fanotify_name_event_equal(struct fanotify_name_event *fne1,
return fanotify_info_equal(info1, info2);
}
-static bool fanotify_should_merge(struct fsnotify_event *old_fsn,
- struct fsnotify_event *new_fsn)
+static bool fanotify_error_event_equal(struct fanotify_error_event *fee1,
+ struct fanotify_error_event *fee2)
{
- struct fanotify_event *old, *new;
+ /* Error events against the same file system are always merged. */
+ if (!fanotify_fsid_equal(&fee1->fsid, &fee2->fsid))
+ return false;
- pr_debug("%s: old=%p new=%p\n", __func__, old_fsn, new_fsn);
- old = FANOTIFY_E(old_fsn);
- new = FANOTIFY_E(new_fsn);
+ return true;
+}
- if (old_fsn->objectid != new_fsn->objectid ||
+static bool fanotify_should_merge(struct fanotify_event *old,
+ struct fanotify_event *new)
+{
+ pr_debug("%s: old=%p new=%p\n", __func__, old, new);
+
+ if (old->hash != new->hash ||
old->type != new->type || old->pid != new->pid)
return false;
@@ -112,6 +153,13 @@ static bool fanotify_should_merge(struct fsnotify_event *old_fsn,
if ((old->mask & FS_ISDIR) != (new->mask & FS_ISDIR))
return false;
+ /*
+ * FAN_RENAME event is reported with special info record types,
+ * so we cannot merge it with other events.
+ */
+ if ((old->mask & FAN_RENAME) != (new->mask & FAN_RENAME))
+ return false;
+
switch (old->type) {
case FANOTIFY_EVENT_TYPE_PATH:
return fanotify_path_equal(fanotify_event_path(old),
@@ -122,6 +170,9 @@ static bool fanotify_should_merge(struct fsnotify_event *old_fsn,
case FANOTIFY_EVENT_TYPE_FID_NAME:
return fanotify_name_event_equal(FANOTIFY_NE(old),
FANOTIFY_NE(new));
+ case FANOTIFY_EVENT_TYPE_FS_ERROR:
+ return fanotify_error_event_equal(FANOTIFY_EE(old),
+ FANOTIFY_EE(new));
default:
WARN_ON_ONCE(1);
}
@@ -133,14 +184,16 @@ static bool fanotify_should_merge(struct fsnotify_event *old_fsn,
#define FANOTIFY_MAX_MERGE_EVENTS 128
/* and the list better be locked by something too! */
-static int fanotify_merge(struct list_head *list, struct fsnotify_event *event)
+static int fanotify_merge(struct fsnotify_group *group,
+ struct fsnotify_event *event)
{
- struct fsnotify_event *test_event;
- struct fanotify_event *new;
+ struct fanotify_event *old, *new = FANOTIFY_E(event);
+ unsigned int bucket = fanotify_event_hash_bucket(group, new);
+ struct hlist_head *hlist = &group->fanotify_data.merge_hash[bucket];
int i = 0;
- pr_debug("%s: list=%p event=%p\n", __func__, list, event);
- new = FANOTIFY_E(event);
+ pr_debug("%s: group=%p event=%p bucket=%u\n", __func__,
+ group, event, bucket);
/*
* Don't merge a permission event with any other event so that we know
@@ -150,11 +203,15 @@ static int fanotify_merge(struct list_head *list, struct fsnotify_event *event)
if (fanotify_is_perm_event(new->mask))
return 0;
- list_for_each_entry_reverse(test_event, list, list) {
+ hlist_for_each_entry(old, hlist, merge_list) {
if (++i > FANOTIFY_MAX_MERGE_EVENTS)
break;
- if (fanotify_should_merge(test_event, event)) {
- FANOTIFY_E(test_event)->mask |= new->mask;
+ if (fanotify_should_merge(old, new)) {
+ old->mask |= new->mask;
+
+ if (fanotify_is_error_event(old->mask))
+ FANOTIFY_EE(old)->err_count++;
+
return 1;
}
}
@@ -190,8 +247,11 @@ static int fanotify_get_response(struct fsnotify_group *group,
return ret;
}
/* Event not yet reported? Just remove it. */
- if (event->state == FAN_EVENT_INIT)
+ if (event->state == FAN_EVENT_INIT) {
fsnotify_remove_queued_event(group, &event->fae.fse);
+ /* Permission events are not supposed to be hashed */
+ WARN_ON_ONCE(!hlist_unhashed(&event->fae.merge_list));
+ }
/*
* Event may be also answered in case signal delivery raced
* with wakeup. In that case we have nothing to do besides
@@ -231,15 +291,17 @@ static int fanotify_get_response(struct fsnotify_group *group,
*/
static u32 fanotify_group_event_mask(struct fsnotify_group *group,
struct fsnotify_iter_info *iter_info,
- u32 event_mask, const void *data,
- int data_type, struct inode *dir)
+ u32 *match_mask, u32 event_mask,
+ const void *data, int data_type,
+ struct inode *dir)
{
- __u32 marks_mask = 0, marks_ignored_mask = 0;
+ __u32 marks_mask = 0, marks_ignore_mask = 0;
__u32 test_mask, user_mask = FANOTIFY_OUTGOING_EVENTS |
FANOTIFY_EVENT_FLAGS;
const struct path *path = fsnotify_data_path(data, data_type);
unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
struct fsnotify_mark *mark;
+ bool ondir = event_mask & FAN_ONDIR;
int type;
pr_debug("%s: report_mask=%x mask=%x data=%p data_type=%d\n",
@@ -254,37 +316,30 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
return 0;
} else if (!(fid_mode & FAN_REPORT_FID)) {
/* Do we have a directory inode to report? */
- if (!dir && !(event_mask & FS_ISDIR))
+ if (!dir && !ondir)
return 0;
}
- fsnotify_foreach_obj_type(type) {
- if (!fsnotify_iter_should_report_type(iter_info, type))
- continue;
- mark = iter_info->marks[type];
-
- /* Apply ignore mask regardless of ISDIR and ON_CHILD flags */
- marks_ignored_mask |= mark->ignored_mask;
-
+ fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
/*
- * If the event is on dir and this mark doesn't care about
- * events on dir, don't send it!
+ * Apply ignore mask depending on event flags in ignore mask.
*/
- if (event_mask & FS_ISDIR && !(mark->mask & FS_ISDIR))
- continue;
+ marks_ignore_mask |=
+ fsnotify_effective_ignore_mask(mark, ondir, type);
/*
- * If the event is on a child and this mark is on a parent not
- * watching children, don't send it!
+ * Send the event depending on event flags in mark mask.
*/
- if (type == FSNOTIFY_OBJ_TYPE_PARENT &&
- !(mark->mask & FS_EVENT_ON_CHILD))
+ if (!fsnotify_mask_applicable(mark->mask, ondir, type))
continue;
marks_mask |= mark->mask;
+
+ /* Record the mark types of this group that matched the event */
+ *match_mask |= 1U << type;
}
- test_mask = event_mask & marks_mask & ~marks_ignored_mask;
+ test_mask = event_mask & marks_mask & ~marks_ignore_mask;
/*
* For dirent modification events (create/delete/move) that do not carry
@@ -319,13 +374,23 @@ static u32 fanotify_group_event_mask(struct fsnotify_group *group,
static int fanotify_encode_fh_len(struct inode *inode)
{
int dwords = 0;
+ int fh_len;
if (!inode)
return 0;
exportfs_encode_inode_fh(inode, NULL, &dwords, NULL);
+ fh_len = dwords << 2;
- return dwords << 2;
+ /*
+ * struct fanotify_error_event might be preallocated and is
+ * limited to MAX_HANDLE_SZ. This should never happen, but
+ * safeguard by forcing an invalid file handle.
+ */
+ if (WARN_ON_ONCE(fh_len > MAX_HANDLE_SZ))
+ return 0;
+
+ return fh_len;
}
/*
@@ -335,7 +400,8 @@ static int fanotify_encode_fh_len(struct inode *inode)
* Return 0 on failure to encode.
*/
static int fanotify_encode_fh(struct fanotify_fh *fh, struct inode *inode,
- unsigned int fh_len, gfp_t gfp)
+ unsigned int fh_len, unsigned int *hash,
+ gfp_t gfp)
{
int dwords, type = 0;
char *ext_buf = NULL;
@@ -345,15 +411,21 @@ static int fanotify_encode_fh(struct fanotify_fh *fh, struct inode *inode,
fh->type = FILEID_ROOT;
fh->len = 0;
fh->flags = 0;
+
+ /*
+ * Invalid FHs are used by FAN_FS_ERROR for errors not
+ * linked to any inode. The f_handle won't be reported
+ * back to userspace.
+ */
if (!inode)
- return 0;
+ goto out;
/*
* !gpf means preallocated variable size fh, but fh_len could
* be zero in that case if encoding fh len failed.
*/
err = -ENOENT;
- if (fh_len < 4 || WARN_ON_ONCE(fh_len % 4))
+ if (fh_len < 4 || WARN_ON_ONCE(fh_len % 4) || fh_len > MAX_HANDLE_SZ)
goto out_err;
/* No external buffer in a variable size allocated fh */
@@ -378,6 +450,14 @@ static int fanotify_encode_fh(struct fanotify_fh *fh, struct inode *inode,
fh->type = type;
fh->len = fh_len;
+out:
+ /*
+ * Mix fh into event merge key. Hash might be NULL in case of
+ * unhashed FID events (i.e. FAN_FS_ERROR).
+ */
+ if (hash)
+ *hash ^= fanotify_hash_fh(fh);
+
return FANOTIFY_FH_HDR_LEN + fh_len;
out_err:
@@ -392,17 +472,41 @@ static int fanotify_encode_fh(struct fanotify_fh *fh, struct inode *inode,
}
/*
- * The inode to use as identifier when reporting fid depends on the event.
- * Report the modified directory inode on dirent modification events.
- * Report the "victim" inode otherwise.
+ * FAN_REPORT_FID is ambiguous in that it reports the fid of the child for
+ * some events and the fid of the parent for create/delete/move events.
+ *
+ * With the FAN_REPORT_TARGET_FID flag, the fid of the child is reported
+ * also in create/delete/move events in addition to the fid of the parent
+ * and the name of the child.
+ */
+static inline bool fanotify_report_child_fid(unsigned int fid_mode, u32 mask)
+{
+ if (mask & ALL_FSNOTIFY_DIRENT_EVENTS)
+ return (fid_mode & FAN_REPORT_TARGET_FID);
+
+ return (fid_mode & FAN_REPORT_FID) && !(mask & FAN_ONDIR);
+}
+
+/*
+ * The inode to use as identifier when reporting fid depends on the event
+ * and the group flags.
+ *
+ * With the group flag FAN_REPORT_TARGET_FID, always report the child fid.
+ *
+ * Without the group flag FAN_REPORT_TARGET_FID, report the modified directory
+ * fid on dirent events and the child fid otherwise.
+ *
* For example:
- * FS_ATTRIB reports the child inode even if reported on a watched parent.
- * FS_CREATE reports the modified dir inode and not the created inode.
+ * FS_ATTRIB reports the child fid even if reported on a watched parent.
+ * FS_CREATE reports the modified dir fid without FAN_REPORT_TARGET_FID.
+ * and reports the created child fid with FAN_REPORT_TARGET_FID.
*/
static struct inode *fanotify_fid_inode(u32 event_mask, const void *data,
- int data_type, struct inode *dir)
+ int data_type, struct inode *dir,
+ unsigned int fid_mode)
{
- if (event_mask & ALL_FSNOTIFY_DIRENT_EVENTS)
+ if ((event_mask & ALL_FSNOTIFY_DIRENT_EVENTS) &&
+ !(fid_mode & FAN_REPORT_TARGET_FID))
return dir;
return fsnotify_data_inode(data, data_type);
@@ -424,13 +528,14 @@ static struct inode *fanotify_dfid_inode(u32 event_mask, const void *data,
if (event_mask & ALL_FSNOTIFY_DIRENT_EVENTS)
return dir;
- if (S_ISDIR(inode->i_mode))
+ if (inode && S_ISDIR(inode->i_mode))
return inode;
return dir;
}
static struct fanotify_event *fanotify_alloc_path_event(const struct path *path,
+ unsigned int *hash,
gfp_t gfp)
{
struct fanotify_path_event *pevent;
@@ -441,6 +546,7 @@ static struct fanotify_event *fanotify_alloc_path_event(const struct path *path,
pevent->fae.type = FANOTIFY_EVENT_TYPE_PATH;
pevent->path = *path;
+ *hash ^= fanotify_hash_path(path);
path_get(path);
return &pevent->fae;
@@ -466,6 +572,7 @@ static struct fanotify_event *fanotify_alloc_perm_event(const struct path *path,
static struct fanotify_event *fanotify_alloc_fid_event(struct inode *id,
__kernel_fsid_t *fsid,
+ unsigned int *hash,
gfp_t gfp)
{
struct fanotify_fid_event *ffe;
@@ -476,78 +583,153 @@ static struct fanotify_event *fanotify_alloc_fid_event(struct inode *id,
ffe->fae.type = FANOTIFY_EVENT_TYPE_FID;
ffe->fsid = *fsid;
+ *hash ^= fanotify_hash_fsid(fsid);
fanotify_encode_fh(&ffe->object_fh, id, fanotify_encode_fh_len(id),
- gfp);
+ hash, gfp);
return &ffe->fae;
}
-static struct fanotify_event *fanotify_alloc_name_event(struct inode *id,
+static struct fanotify_event *fanotify_alloc_name_event(struct inode *dir,
__kernel_fsid_t *fsid,
- const struct qstr *file_name,
+ const struct qstr *name,
struct inode *child,
+ struct dentry *moved,
+ unsigned int *hash,
gfp_t gfp)
{
struct fanotify_name_event *fne;
struct fanotify_info *info;
struct fanotify_fh *dfh, *ffh;
- unsigned int dir_fh_len = fanotify_encode_fh_len(id);
+ struct inode *dir2 = moved ? d_inode(moved->d_parent) : NULL;
+ const struct qstr *name2 = moved ? &moved->d_name : NULL;
+ unsigned int dir_fh_len = fanotify_encode_fh_len(dir);
+ unsigned int dir2_fh_len = fanotify_encode_fh_len(dir2);
unsigned int child_fh_len = fanotify_encode_fh_len(child);
- unsigned int size;
-
- size = sizeof(*fne) + FANOTIFY_FH_HDR_LEN + dir_fh_len;
+ unsigned long name_len = name ? name->len : 0;
+ unsigned long name2_len = name2 ? name2->len : 0;
+ unsigned int len, size;
+
+ /* Reserve terminating null byte even for empty name */
+ size = sizeof(*fne) + name_len + name2_len + 2;
+ if (dir_fh_len)
+ size += FANOTIFY_FH_HDR_LEN + dir_fh_len;
+ if (dir2_fh_len)
+ size += FANOTIFY_FH_HDR_LEN + dir2_fh_len;
if (child_fh_len)
size += FANOTIFY_FH_HDR_LEN + child_fh_len;
- if (file_name)
- size += file_name->len + 1;
fne = kmalloc(size, gfp);
if (!fne)
return NULL;
fne->fae.type = FANOTIFY_EVENT_TYPE_FID_NAME;
fne->fsid = *fsid;
+ *hash ^= fanotify_hash_fsid(fsid);
info = &fne->info;
fanotify_info_init(info);
- dfh = fanotify_info_dir_fh(info);
- info->dir_fh_totlen = fanotify_encode_fh(dfh, id, dir_fh_len, 0);
+ if (dir_fh_len) {
+ dfh = fanotify_info_dir_fh(info);
+ len = fanotify_encode_fh(dfh, dir, dir_fh_len, hash, 0);
+ fanotify_info_set_dir_fh(info, len);
+ }
+ if (dir2_fh_len) {
+ dfh = fanotify_info_dir2_fh(info);
+ len = fanotify_encode_fh(dfh, dir2, dir2_fh_len, hash, 0);
+ fanotify_info_set_dir2_fh(info, len);
+ }
if (child_fh_len) {
ffh = fanotify_info_file_fh(info);
- info->file_fh_totlen = fanotify_encode_fh(ffh, child, child_fh_len, 0);
+ len = fanotify_encode_fh(ffh, child, child_fh_len, hash, 0);
+ fanotify_info_set_file_fh(info, len);
+ }
+ if (name_len) {
+ fanotify_info_copy_name(info, name);
+ *hash ^= full_name_hash((void *)name_len, name->name, name_len);
+ }
+ if (name2_len) {
+ fanotify_info_copy_name2(info, name2);
+ *hash ^= full_name_hash((void *)name2_len, name2->name,
+ name2_len);
}
- if (file_name)
- fanotify_info_copy_name(info, file_name);
- pr_debug("%s: ino=%lu size=%u dir_fh_len=%u child_fh_len=%u name_len=%u name='%.*s'\n",
- __func__, id->i_ino, size, dir_fh_len, child_fh_len,
+ pr_debug("%s: size=%u dir_fh_len=%u child_fh_len=%u name_len=%u name='%.*s'\n",
+ __func__, size, dir_fh_len, child_fh_len,
info->name_len, info->name_len, fanotify_info_name(info));
+ if (dir2_fh_len) {
+ pr_debug("%s: dir2_fh_len=%u name2_len=%u name2='%.*s'\n",
+ __func__, dir2_fh_len, info->name2_len,
+ info->name2_len, fanotify_info_name2(info));
+ }
+
return &fne->fae;
}
-static struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
- u32 mask, const void *data,
- int data_type, struct inode *dir,
- const struct qstr *file_name,
- __kernel_fsid_t *fsid)
+static struct fanotify_event *fanotify_alloc_error_event(
+ struct fsnotify_group *group,
+ __kernel_fsid_t *fsid,
+ const void *data, int data_type,
+ unsigned int *hash)
+{
+ struct fs_error_report *report =
+ fsnotify_data_error_report(data, data_type);
+ struct inode *inode;
+ struct fanotify_error_event *fee;
+ int fh_len;
+
+ if (WARN_ON_ONCE(!report))
+ return NULL;
+
+ fee = mempool_alloc(&group->fanotify_data.error_events_pool, GFP_NOFS);
+ if (!fee)
+ return NULL;
+
+ fee->fae.type = FANOTIFY_EVENT_TYPE_FS_ERROR;
+ fee->error = report->error;
+ fee->err_count = 1;
+ fee->fsid = *fsid;
+
+ inode = report->inode;
+ fh_len = fanotify_encode_fh_len(inode);
+
+ /* Bad fh_len. Fallback to using an invalid fh. Should never happen. */
+ if (!fh_len && inode)
+ inode = NULL;
+
+ fanotify_encode_fh(&fee->object_fh, inode, fh_len, NULL, 0);
+
+ *hash ^= fanotify_hash_fsid(fsid);
+
+ return &fee->fae;
+}
+
+static struct fanotify_event *fanotify_alloc_event(
+ struct fsnotify_group *group,
+ u32 mask, const void *data, int data_type,
+ struct inode *dir, const struct qstr *file_name,
+ __kernel_fsid_t *fsid, u32 match_mask)
{
struct fanotify_event *event = NULL;
gfp_t gfp = GFP_KERNEL_ACCOUNT;
- struct inode *id = fanotify_fid_inode(mask, data, data_type, dir);
+ unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
+ struct inode *id = fanotify_fid_inode(mask, data, data_type, dir,
+ fid_mode);
struct inode *dirid = fanotify_dfid_inode(mask, data, data_type, dir);
const struct path *path = fsnotify_data_path(data, data_type);
- unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
struct mem_cgroup *old_memcg;
+ struct dentry *moved = NULL;
struct inode *child = NULL;
bool name_event = false;
+ unsigned int hash = 0;
+ bool ondir = mask & FAN_ONDIR;
+ struct pid *pid;
if ((fid_mode & FAN_REPORT_DIR_FID) && dirid) {
/*
- * With both flags FAN_REPORT_DIR_FID and FAN_REPORT_FID, we
- * report the child fid for events reported on a non-dir child
+ * For certain events and group flags, report the child fid
* in addition to reporting the parent fid and maybe child name.
*/
- if ((fid_mode & FAN_REPORT_FID) &&
- id != dirid && !(mask & FAN_ONDIR))
+ if (fanotify_report_child_fid(fid_mode, mask) && id != dirid)
child = id;
id = dirid;
@@ -568,10 +750,41 @@ static struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
if (!(fid_mode & FAN_REPORT_NAME)) {
name_event = !!child;
file_name = NULL;
- } else if ((mask & ALL_FSNOTIFY_DIRENT_EVENTS) ||
- !(mask & FAN_ONDIR)) {
+ } else if ((mask & ALL_FSNOTIFY_DIRENT_EVENTS) || !ondir) {
name_event = true;
}
+
+ /*
+ * In the special case of FAN_RENAME event, use the match_mask
+ * to determine if we need to report only the old parent+name,
+ * only the new parent+name or both.
+ * 'dirid' and 'file_name' are the old parent+name and
+ * 'moved' has the new parent+name.
+ */
+ if (mask & FAN_RENAME) {
+ bool report_old, report_new;
+
+ if (WARN_ON_ONCE(!match_mask))
+ return NULL;
+
+ /* Report both old and new parent+name if sb watching */
+ report_old = report_new =
+ match_mask & (1U << FSNOTIFY_ITER_TYPE_SB);
+ report_old |=
+ match_mask & (1U << FSNOTIFY_ITER_TYPE_INODE);
+ report_new |=
+ match_mask & (1U << FSNOTIFY_ITER_TYPE_INODE2);
+
+ if (!report_old) {
+ /* Do not report old parent+name */
+ dirid = NULL;
+ file_name = NULL;
+ }
+ if (report_new) {
+ /* Report new parent+name */
+ moved = fsnotify_data_dentry(data, data_type);
+ }
+ }
}
/*
@@ -590,28 +803,30 @@ static struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
if (fanotify_is_perm_event(mask)) {
event = fanotify_alloc_perm_event(path, gfp);
- } else if (name_event && (file_name || child)) {
- event = fanotify_alloc_name_event(id, fsid, file_name, child,
- gfp);
+ } else if (fanotify_is_error_event(mask)) {
+ event = fanotify_alloc_error_event(group, fsid, data,
+ data_type, &hash);
+ } else if (name_event && (file_name || moved || child)) {
+ event = fanotify_alloc_name_event(dirid, fsid, file_name, child,
+ moved, &hash, gfp);
} else if (fid_mode) {
- event = fanotify_alloc_fid_event(id, fsid, gfp);
+ event = fanotify_alloc_fid_event(id, fsid, &hash, gfp);
} else {
- event = fanotify_alloc_path_event(path, gfp);
+ event = fanotify_alloc_path_event(path, &hash, gfp);
}
if (!event)
goto out;
- /*
- * Use the victim inode instead of the watching inode as the id for
- * event queue, so event reported on parent is merged with event
- * reported on child when both directory and child watches exist.
- */
- fanotify_init_event(event, (unsigned long)id, mask);
if (FAN_GROUP_FLAG(group, FAN_REPORT_TID))
- event->pid = get_pid(task_pid(current));
+ pid = get_pid(task_pid(current));
else
- event->pid = get_pid(task_tgid(current));
+ pid = get_pid(task_tgid(current));
+
+ /* Mix event info, FAN_ONDIR flag and pid into event merge key */
+ hash ^= hash_long((unsigned long)pid | ondir, FANOTIFY_EVENT_HASH_BITS);
+ fanotify_init_event(event, hash, mask);
+ event->pid = pid;
out:
set_active_memcg(old_memcg);
@@ -625,16 +840,14 @@ static struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
*/
static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info)
{
+ struct fsnotify_mark *mark;
int type;
__kernel_fsid_t fsid = {};
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
struct fsnotify_mark_connector *conn;
- if (!fsnotify_iter_should_report_type(iter_info, type))
- continue;
-
- conn = READ_ONCE(iter_info->marks[type]->connector);
+ conn = READ_ONCE(mark->connector);
/* Mark is just getting destroyed or created? */
if (!conn)
continue;
@@ -651,6 +864,27 @@ static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info)
return fsid;
}
+/*
+ * Add an event to hash table for faster merge.
+ */
+static void fanotify_insert_event(struct fsnotify_group *group,
+ struct fsnotify_event *fsn_event)
+{
+ struct fanotify_event *event = FANOTIFY_E(fsn_event);
+ unsigned int bucket = fanotify_event_hash_bucket(group, event);
+ struct hlist_head *hlist = &group->fanotify_data.merge_hash[bucket];
+
+ assert_spin_locked(&group->notification_lock);
+
+ if (!fanotify_is_hashed_event(event->mask))
+ return;
+
+ pr_debug("%s: group=%p event=%p bucket=%u\n", __func__,
+ group, event, bucket);
+
+ hlist_add_head(&event->merge_list, hlist);
+}
+
static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
const void *data, int data_type,
struct inode *dir,
@@ -661,6 +895,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
struct fanotify_event *event;
struct fsnotify_event *fsn_event;
__kernel_fsid_t fsid = {};
+ u32 match_mask = 0;
BUILD_BUG_ON(FAN_ACCESS != FS_ACCESS);
BUILD_BUG_ON(FAN_MODIFY != FS_MODIFY);
@@ -681,15 +916,18 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
BUILD_BUG_ON(FAN_ONDIR != FS_ISDIR);
BUILD_BUG_ON(FAN_OPEN_EXEC != FS_OPEN_EXEC);
BUILD_BUG_ON(FAN_OPEN_EXEC_PERM != FS_OPEN_EXEC_PERM);
+ BUILD_BUG_ON(FAN_FS_ERROR != FS_ERROR);
+ BUILD_BUG_ON(FAN_RENAME != FS_RENAME);
- BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 19);
+ BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 21);
- mask = fanotify_group_event_mask(group, iter_info, mask, data,
- data_type, dir);
+ mask = fanotify_group_event_mask(group, iter_info, &match_mask,
+ mask, data, data_type, dir);
if (!mask)
return 0;
- pr_debug("%s: group=%p mask=%x\n", __func__, group, mask);
+ pr_debug("%s: group=%p mask=%x report_mask=%x\n", __func__,
+ group, mask, match_mask);
if (fanotify_is_perm_event(mask)) {
/*
@@ -708,7 +946,7 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
}
event = fanotify_alloc_event(group, mask, data, data_type, dir,
- file_name, &fsid);
+ file_name, &fsid, match_mask);
ret = -ENOMEM;
if (unlikely(!event)) {
/*
@@ -721,7 +959,8 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
}
fsn_event = &event->fse;
- ret = fsnotify_add_event(group, fsn_event, fanotify_merge);
+ ret = fsnotify_insert_event(group, fsn_event, fanotify_merge,
+ fanotify_insert_event);
if (ret) {
/* Permission events shouldn't be merged */
BUG_ON(ret == 1 && mask & FANOTIFY_PERM_EVENTS);
@@ -742,11 +981,13 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
static void fanotify_free_group_priv(struct fsnotify_group *group)
{
- struct user_struct *user;
+ kfree(group->fanotify_data.merge_hash);
+ if (group->fanotify_data.ucounts)
+ dec_ucount(group->fanotify_data.ucounts,
+ UCOUNT_FANOTIFY_GROUPS);
- user = group->fanotify_data.user;
- atomic_dec(&user->fanotify_listeners);
- free_uid(user);
+ if (mempool_initialized(&group->fanotify_data.error_events_pool))
+ mempool_exit(&group->fanotify_data.error_events_pool);
}
static void fanotify_free_path_event(struct fanotify_event *event)
@@ -775,7 +1016,16 @@ static void fanotify_free_name_event(struct fanotify_event *event)
kfree(FANOTIFY_NE(event));
}
-static void fanotify_free_event(struct fsnotify_event *fsn_event)
+static void fanotify_free_error_event(struct fsnotify_group *group,
+ struct fanotify_event *event)
+{
+ struct fanotify_error_event *fee = FANOTIFY_EE(event);
+
+ mempool_free(fee, &group->fanotify_data.error_events_pool);
+}
+
+static void fanotify_free_event(struct fsnotify_group *group,
+ struct fsnotify_event *fsn_event)
{
struct fanotify_event *event;
@@ -797,11 +1047,21 @@ static void fanotify_free_event(struct fsnotify_event *fsn_event)
case FANOTIFY_EVENT_TYPE_OVERFLOW:
kfree(event);
break;
+ case FANOTIFY_EVENT_TYPE_FS_ERROR:
+ fanotify_free_error_event(group, event);
+ break;
default:
WARN_ON_ONCE(1);
}
}
+static void fanotify_freeing_mark(struct fsnotify_mark *mark,
+ struct fsnotify_group *group)
+{
+ if (!FAN_GROUP_FLAG(group, FAN_UNLIMITED_MARKS))
+ dec_ucount(group->fanotify_data.ucounts, UCOUNT_FANOTIFY_MARKS);
+}
+
static void fanotify_free_mark(struct fsnotify_mark *fsn_mark)
{
kmem_cache_free(fanotify_mark_cache, fsn_mark);
@@ -811,5 +1071,6 @@ const struct fsnotify_ops fanotify_fsnotify_ops = {
.handle_event = fanotify_handle_event,
.free_group_priv = fanotify_free_group_priv,
.free_event = fanotify_free_event,
+ .freeing_mark = fanotify_freeing_mark,
.free_mark = fanotify_free_mark,
};
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h
index 896c819a1786..57f51a9a3015 100644
--- a/fs/notify/fanotify/fanotify.h
+++ b/fs/notify/fanotify/fanotify.h
@@ -3,6 +3,7 @@
#include <linux/path.h>
#include <linux/slab.h>
#include <linux/exportfs.h>
+#include <linux/hashtable.h>
extern struct kmem_cache *fanotify_mark_cache;
extern struct kmem_cache *fanotify_fid_event_cachep;
@@ -39,15 +40,45 @@ struct fanotify_fh {
struct fanotify_info {
/* size of dir_fh/file_fh including fanotify_fh hdr size */
u8 dir_fh_totlen;
+ u8 dir2_fh_totlen;
u8 file_fh_totlen;
u8 name_len;
- u8 pad;
+ u8 name2_len;
+ u8 pad[3];
unsigned char buf[];
/*
* (struct fanotify_fh) dir_fh starts at buf[0]
- * (optional) file_fh starts at buf[dir_fh_totlen]
- * name starts at buf[dir_fh_totlen + file_fh_totlen]
+ * (optional) dir2_fh starts at buf[dir_fh_totlen]
+ * (optional) file_fh starts at buf[dir_fh_totlen + dir2_fh_totlen]
+ * name starts at buf[dir_fh_totlen + dir2_fh_totlen + file_fh_totlen]
+ * ...
*/
+#define FANOTIFY_DIR_FH_SIZE(info) ((info)->dir_fh_totlen)
+#define FANOTIFY_DIR2_FH_SIZE(info) ((info)->dir2_fh_totlen)
+#define FANOTIFY_FILE_FH_SIZE(info) ((info)->file_fh_totlen)
+#define FANOTIFY_NAME_SIZE(info) ((info)->name_len + 1)
+#define FANOTIFY_NAME2_SIZE(info) ((info)->name2_len + 1)
+
+#define FANOTIFY_DIR_FH_OFFSET(info) 0
+#define FANOTIFY_DIR2_FH_OFFSET(info) \
+ (FANOTIFY_DIR_FH_OFFSET(info) + FANOTIFY_DIR_FH_SIZE(info))
+#define FANOTIFY_FILE_FH_OFFSET(info) \
+ (FANOTIFY_DIR2_FH_OFFSET(info) + FANOTIFY_DIR2_FH_SIZE(info))
+#define FANOTIFY_NAME_OFFSET(info) \
+ (FANOTIFY_FILE_FH_OFFSET(info) + FANOTIFY_FILE_FH_SIZE(info))
+#define FANOTIFY_NAME2_OFFSET(info) \
+ (FANOTIFY_NAME_OFFSET(info) + FANOTIFY_NAME_SIZE(info))
+
+#define FANOTIFY_DIR_FH_BUF(info) \
+ ((info)->buf + FANOTIFY_DIR_FH_OFFSET(info))
+#define FANOTIFY_DIR2_FH_BUF(info) \
+ ((info)->buf + FANOTIFY_DIR2_FH_OFFSET(info))
+#define FANOTIFY_FILE_FH_BUF(info) \
+ ((info)->buf + FANOTIFY_FILE_FH_OFFSET(info))
+#define FANOTIFY_NAME_BUF(info) \
+ ((info)->buf + FANOTIFY_NAME_OFFSET(info))
+#define FANOTIFY_NAME2_BUF(info) \
+ ((info)->buf + FANOTIFY_NAME2_OFFSET(info))
} __aligned(4);
static inline bool fanotify_fh_has_ext_buf(struct fanotify_fh *fh)
@@ -86,7 +117,21 @@ static inline struct fanotify_fh *fanotify_info_dir_fh(struct fanotify_info *inf
{
BUILD_BUG_ON(offsetof(struct fanotify_info, buf) % 4);
- return (struct fanotify_fh *)info->buf;
+ return (struct fanotify_fh *)FANOTIFY_DIR_FH_BUF(info);
+}
+
+static inline int fanotify_info_dir2_fh_len(struct fanotify_info *info)
+{
+ if (!info->dir2_fh_totlen ||
+ WARN_ON_ONCE(info->dir2_fh_totlen < FANOTIFY_FH_HDR_LEN))
+ return 0;
+
+ return info->dir2_fh_totlen - FANOTIFY_FH_HDR_LEN;
+}
+
+static inline struct fanotify_fh *fanotify_info_dir2_fh(struct fanotify_info *info)
+{
+ return (struct fanotify_fh *)FANOTIFY_DIR2_FH_BUF(info);
}
static inline int fanotify_info_file_fh_len(struct fanotify_info *info)
@@ -100,27 +145,90 @@ static inline int fanotify_info_file_fh_len(struct fanotify_info *info)
static inline struct fanotify_fh *fanotify_info_file_fh(struct fanotify_info *info)
{
- return (struct fanotify_fh *)(info->buf + info->dir_fh_totlen);
+ return (struct fanotify_fh *)FANOTIFY_FILE_FH_BUF(info);
+}
+
+static inline char *fanotify_info_name(struct fanotify_info *info)
+{
+ if (!info->name_len)
+ return NULL;
+
+ return FANOTIFY_NAME_BUF(info);
}
-static inline const char *fanotify_info_name(struct fanotify_info *info)
+static inline char *fanotify_info_name2(struct fanotify_info *info)
{
- return info->buf + info->dir_fh_totlen + info->file_fh_totlen;
+ if (!info->name2_len)
+ return NULL;
+
+ return FANOTIFY_NAME2_BUF(info);
}
static inline void fanotify_info_init(struct fanotify_info *info)
{
+ BUILD_BUG_ON(FANOTIFY_FH_HDR_LEN + MAX_HANDLE_SZ > U8_MAX);
+ BUILD_BUG_ON(NAME_MAX > U8_MAX);
+
info->dir_fh_totlen = 0;
+ info->dir2_fh_totlen = 0;
info->file_fh_totlen = 0;
info->name_len = 0;
+ info->name2_len = 0;
+}
+
+/* These set/copy helpers MUST be called by order */
+static inline void fanotify_info_set_dir_fh(struct fanotify_info *info,
+ unsigned int totlen)
+{
+ if (WARN_ON_ONCE(info->dir2_fh_totlen > 0) ||
+ WARN_ON_ONCE(info->file_fh_totlen > 0) ||
+ WARN_ON_ONCE(info->name_len > 0) ||
+ WARN_ON_ONCE(info->name2_len > 0))
+ return;
+
+ info->dir_fh_totlen = totlen;
+}
+
+static inline void fanotify_info_set_dir2_fh(struct fanotify_info *info,
+ unsigned int totlen)
+{
+ if (WARN_ON_ONCE(info->file_fh_totlen > 0) ||
+ WARN_ON_ONCE(info->name_len > 0) ||
+ WARN_ON_ONCE(info->name2_len > 0))
+ return;
+
+ info->dir2_fh_totlen = totlen;
+}
+
+static inline void fanotify_info_set_file_fh(struct fanotify_info *info,
+ unsigned int totlen)
+{
+ if (WARN_ON_ONCE(info->name_len > 0) ||
+ WARN_ON_ONCE(info->name2_len > 0))
+ return;
+
+ info->file_fh_totlen = totlen;
}
static inline void fanotify_info_copy_name(struct fanotify_info *info,
const struct qstr *name)
{
+ if (WARN_ON_ONCE(name->len > NAME_MAX) ||
+ WARN_ON_ONCE(info->name2_len > 0))
+ return;
+
info->name_len = name->len;
- strcpy(info->buf + info->dir_fh_totlen + info->file_fh_totlen,
- name->name);
+ strcpy(fanotify_info_name(info), name->name);
+}
+
+static inline void fanotify_info_copy_name2(struct fanotify_info *info,
+ const struct qstr *name)
+{
+ if (WARN_ON_ONCE(name->len > NAME_MAX))
+ return;
+
+ info->name2_len = name->len;
+ strcpy(fanotify_info_name2(info), name->name);
}
/*
@@ -135,29 +243,48 @@ enum fanotify_event_type {
FANOTIFY_EVENT_TYPE_PATH,
FANOTIFY_EVENT_TYPE_PATH_PERM,
FANOTIFY_EVENT_TYPE_OVERFLOW, /* struct fanotify_event */
+ FANOTIFY_EVENT_TYPE_FS_ERROR, /* struct fanotify_error_event */
+ __FANOTIFY_EVENT_TYPE_NUM
};
+#define FANOTIFY_EVENT_TYPE_BITS \
+ (ilog2(__FANOTIFY_EVENT_TYPE_NUM - 1) + 1)
+#define FANOTIFY_EVENT_HASH_BITS \
+ (32 - FANOTIFY_EVENT_TYPE_BITS)
+
struct fanotify_event {
struct fsnotify_event fse;
+ struct hlist_node merge_list; /* List for hashed merge */
u32 mask;
- enum fanotify_event_type type;
+ struct {
+ unsigned int type : FANOTIFY_EVENT_TYPE_BITS;
+ unsigned int hash : FANOTIFY_EVENT_HASH_BITS;
+ };
struct pid *pid;
};
static inline void fanotify_init_event(struct fanotify_event *event,
- unsigned long id, u32 mask)
+ unsigned int hash, u32 mask)
{
- fsnotify_init_event(&event->fse, id);
+ fsnotify_init_event(&event->fse);
+ INIT_HLIST_NODE(&event->merge_list);
+ event->hash = hash;
event->mask = mask;
event->pid = NULL;
}
+#define FANOTIFY_INLINE_FH(name, size) \
+struct { \
+ struct fanotify_fh (name); \
+ /* Space for object_fh.buf[] - access with fanotify_fh_buf() */ \
+ unsigned char _inline_fh_buf[(size)]; \
+}
+
struct fanotify_fid_event {
struct fanotify_event fae;
__kernel_fsid_t fsid;
- struct fanotify_fh object_fh;
- /* Reserve space in object_fh.buf[] - access with fanotify_fh_buf() */
- unsigned char _inline_fh_buf[FANOTIFY_INLINE_FH_LEN];
+
+ FANOTIFY_INLINE_FH(object_fh, FANOTIFY_INLINE_FH_LEN);
};
static inline struct fanotify_fid_event *
@@ -178,12 +305,30 @@ FANOTIFY_NE(struct fanotify_event *event)
return container_of(event, struct fanotify_name_event, fae);
}
+struct fanotify_error_event {
+ struct fanotify_event fae;
+ s32 error; /* Error reported by the Filesystem. */
+ u32 err_count; /* Suppressed errors count */
+
+ __kernel_fsid_t fsid; /* FSID this error refers to. */
+
+ FANOTIFY_INLINE_FH(object_fh, MAX_HANDLE_SZ);
+};
+
+static inline struct fanotify_error_event *
+FANOTIFY_EE(struct fanotify_event *event)
+{
+ return container_of(event, struct fanotify_error_event, fae);
+}
+
static inline __kernel_fsid_t *fanotify_event_fsid(struct fanotify_event *event)
{
if (event->type == FANOTIFY_EVENT_TYPE_FID)
return &FANOTIFY_FE(event)->fsid;
else if (event->type == FANOTIFY_EVENT_TYPE_FID_NAME)
return &FANOTIFY_NE(event)->fsid;
+ else if (event->type == FANOTIFY_EVENT_TYPE_FS_ERROR)
+ return &FANOTIFY_EE(event)->fsid;
else
return NULL;
}
@@ -195,6 +340,8 @@ static inline struct fanotify_fh *fanotify_event_object_fh(
return &FANOTIFY_FE(event)->object_fh;
else if (event->type == FANOTIFY_EVENT_TYPE_FID_NAME)
return fanotify_info_file_fh(&FANOTIFY_NE(event)->info);
+ else if (event->type == FANOTIFY_EVENT_TYPE_FS_ERROR)
+ return &FANOTIFY_EE(event)->object_fh;
else
return NULL;
}
@@ -226,6 +373,37 @@ static inline int fanotify_event_dir_fh_len(struct fanotify_event *event)
return info ? fanotify_info_dir_fh_len(info) : 0;
}
+static inline int fanotify_event_dir2_fh_len(struct fanotify_event *event)
+{
+ struct fanotify_info *info = fanotify_event_info(event);
+
+ return info ? fanotify_info_dir2_fh_len(info) : 0;
+}
+
+static inline bool fanotify_event_has_object_fh(struct fanotify_event *event)
+{
+ /* For error events, even zeroed fh are reported. */
+ if (event->type == FANOTIFY_EVENT_TYPE_FS_ERROR)
+ return true;
+ return fanotify_event_object_fh_len(event) > 0;
+}
+
+static inline bool fanotify_event_has_dir_fh(struct fanotify_event *event)
+{
+ return fanotify_event_dir_fh_len(event) > 0;
+}
+
+static inline bool fanotify_event_has_dir2_fh(struct fanotify_event *event)
+{
+ return fanotify_event_dir2_fh_len(event) > 0;
+}
+
+static inline bool fanotify_event_has_any_dir_fh(struct fanotify_event *event)
+{
+ return fanotify_event_has_dir_fh(event) ||
+ fanotify_event_has_dir2_fh(event);
+}
+
struct fanotify_path_event {
struct fanotify_event fae;
struct path path;
@@ -269,13 +447,12 @@ static inline struct fanotify_event *FANOTIFY_E(struct fsnotify_event *fse)
return container_of(fse, struct fanotify_event, fse);
}
-static inline bool fanotify_event_has_path(struct fanotify_event *event)
+static inline bool fanotify_is_error_event(u32 mask)
{
- return event->type == FANOTIFY_EVENT_TYPE_PATH ||
- event->type == FANOTIFY_EVENT_TYPE_PATH_PERM;
+ return mask & FAN_FS_ERROR;
}
-static inline struct path *fanotify_event_path(struct fanotify_event *event)
+static inline const struct path *fanotify_event_path(struct fanotify_event *event)
{
if (event->type == FANOTIFY_EVENT_TYPE_PATH)
return &FANOTIFY_PE(event)->path;
@@ -284,3 +461,40 @@ static inline struct path *fanotify_event_path(struct fanotify_event *event)
else
return NULL;
}
+
+/*
+ * Use 128 size hash table to speed up events merge.
+ */
+#define FANOTIFY_HTABLE_BITS (7)
+#define FANOTIFY_HTABLE_SIZE (1 << FANOTIFY_HTABLE_BITS)
+#define FANOTIFY_HTABLE_MASK (FANOTIFY_HTABLE_SIZE - 1)
+
+/*
+ * Permission events and overflow event do not get merged - don't hash them.
+ */
+static inline bool fanotify_is_hashed_event(u32 mask)
+{
+ return !(fanotify_is_perm_event(mask) ||
+ fsnotify_is_overflow_event(mask));
+}
+
+static inline unsigned int fanotify_event_hash_bucket(
+ struct fsnotify_group *group,
+ struct fanotify_event *event)
+{
+ return event->hash & FANOTIFY_HTABLE_MASK;
+}
+
+static inline unsigned int fanotify_mark_user_flags(struct fsnotify_mark *mark)
+{
+ unsigned int mflags = 0;
+
+ if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
+ mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
+ if (mark->flags & FSNOTIFY_MARK_FLAG_NO_IREF)
+ mflags |= FAN_MARK_EVICTABLE;
+ if (mark->flags & FSNOTIFY_MARK_FLAG_HAS_IGNORE_FLAGS)
+ mflags |= FAN_MARK_IGNORE;
+
+ return mflags;
+}
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 84de9f97bbc0..5302313f28be 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/fanotify.h>
#include <linux/fcntl.h>
+#include <linux/fdtable.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/anon_inodes.h>
@@ -27,8 +28,62 @@
#include "fanotify.h"
#define FANOTIFY_DEFAULT_MAX_EVENTS 16384
-#define FANOTIFY_DEFAULT_MAX_MARKS 8192
-#define FANOTIFY_DEFAULT_MAX_LISTENERS 128
+#define FANOTIFY_OLD_DEFAULT_MAX_MARKS 8192
+#define FANOTIFY_DEFAULT_MAX_GROUPS 128
+#define FANOTIFY_DEFAULT_FEE_POOL_SIZE 32
+
+/*
+ * Legacy fanotify marks limits (8192) is per group and we introduced a tunable
+ * limit of marks per user, similar to inotify. Effectively, the legacy limit
+ * of fanotify marks per user is <max marks per group> * <max groups per user>.
+ * This default limit (1M) also happens to match the increased limit of inotify
+ * max_user_watches since v5.10.
+ */
+#define FANOTIFY_DEFAULT_MAX_USER_MARKS \
+ (FANOTIFY_OLD_DEFAULT_MAX_MARKS * FANOTIFY_DEFAULT_MAX_GROUPS)
+
+/*
+ * Most of the memory cost of adding an inode mark is pinning the marked inode.
+ * The size of the filesystem inode struct is not uniform across filesystems,
+ * so double the size of a VFS inode is used as a conservative approximation.
+ */
+#define INODE_MARK_COST (2 * sizeof(struct inode))
+
+/* configurable via /proc/sys/fs/fanotify/ */
+static int fanotify_max_queued_events __read_mostly;
+
+#ifdef CONFIG_SYSCTL
+
+#include <linux/sysctl.h>
+
+struct ctl_table fanotify_table[] = {
+ {
+ .procname = "max_user_groups",
+ .data = &init_user_ns.ucount_max[UCOUNT_FANOTIFY_GROUPS],
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "max_user_marks",
+ .data = &init_user_ns.ucount_max[UCOUNT_FANOTIFY_MARKS],
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "max_queued_events",
+ .data = &fanotify_max_queued_events,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO
+ },
+ { }
+};
+#endif /* CONFIG_SYSCTL */
/*
* All flags that may be specified in parameter event_f_flags of fanotify_init.
@@ -51,8 +106,12 @@ struct kmem_cache *fanotify_path_event_cachep __read_mostly;
struct kmem_cache *fanotify_perm_event_cachep __read_mostly;
#define FANOTIFY_EVENT_ALIGN 4
-#define FANOTIFY_INFO_HDR_LEN \
+#define FANOTIFY_FID_INFO_HDR_LEN \
(sizeof(struct fanotify_event_info_fid) + sizeof(struct file_handle))
+#define FANOTIFY_PIDFD_INFO_HDR_LEN \
+ sizeof(struct fanotify_event_info_pidfd)
+#define FANOTIFY_ERROR_INFO_LEN \
+ (sizeof(struct fanotify_event_info_error))
static int fanotify_fid_info_len(int fh_len, int name_len)
{
@@ -61,21 +120,45 @@ static int fanotify_fid_info_len(int fh_len, int name_len)
if (name_len)
info_len += name_len + 1;
- return roundup(FANOTIFY_INFO_HDR_LEN + info_len, FANOTIFY_EVENT_ALIGN);
+ return roundup(FANOTIFY_FID_INFO_HDR_LEN + info_len,
+ FANOTIFY_EVENT_ALIGN);
}
-static int fanotify_event_info_len(unsigned int fid_mode,
- struct fanotify_event *event)
+/* FAN_RENAME may have one or two dir+name info records */
+static int fanotify_dir_name_info_len(struct fanotify_event *event)
{
struct fanotify_info *info = fanotify_event_info(event);
int dir_fh_len = fanotify_event_dir_fh_len(event);
- int fh_len = fanotify_event_object_fh_len(event);
+ int dir2_fh_len = fanotify_event_dir2_fh_len(event);
int info_len = 0;
+
+ if (dir_fh_len)
+ info_len += fanotify_fid_info_len(dir_fh_len,
+ info->name_len);
+ if (dir2_fh_len)
+ info_len += fanotify_fid_info_len(dir2_fh_len,
+ info->name2_len);
+
+ return info_len;
+}
+
+static size_t fanotify_event_len(unsigned int info_mode,
+ struct fanotify_event *event)
+{
+ size_t event_len = FAN_EVENT_METADATA_LEN;
+ int fh_len;
int dot_len = 0;
- if (dir_fh_len) {
- info_len += fanotify_fid_info_len(dir_fh_len, info->name_len);
- } else if ((fid_mode & FAN_REPORT_NAME) && (event->mask & FAN_ONDIR)) {
+ if (!info_mode)
+ return event_len;
+
+ if (fanotify_is_error_event(event->mask))
+ event_len += FANOTIFY_ERROR_INFO_LEN;
+
+ if (fanotify_event_has_any_dir_fh(event)) {
+ event_len += fanotify_dir_name_info_len(event);
+ } else if ((info_mode & FAN_REPORT_NAME) &&
+ (event->mask & FAN_ONDIR)) {
/*
* With group flag FAN_REPORT_NAME, if name was not recorded in
* event on a directory, we will report the name ".".
@@ -83,10 +166,32 @@ static int fanotify_event_info_len(unsigned int fid_mode,
dot_len = 1;
}
- if (fh_len)
- info_len += fanotify_fid_info_len(fh_len, dot_len);
+ if (info_mode & FAN_REPORT_PIDFD)
+ event_len += FANOTIFY_PIDFD_INFO_HDR_LEN;
- return info_len;
+ if (fanotify_event_has_object_fh(event)) {
+ fh_len = fanotify_event_object_fh_len(event);
+ event_len += fanotify_fid_info_len(fh_len, dot_len);
+ }
+
+ return event_len;
+}
+
+/*
+ * Remove an hashed event from merge hash table.
+ */
+static void fanotify_unhash_event(struct fsnotify_group *group,
+ struct fanotify_event *event)
+{
+ assert_spin_locked(&group->notification_lock);
+
+ pr_debug("%s: group=%p event=%p bucket=%u\n", __func__,
+ group, event, fanotify_event_hash_bucket(group, event));
+
+ if (WARN_ON_ONCE(hlist_unhashed(&event->merge_list)))
+ return;
+
+ hlist_del_init(&event->merge_list);
}
/*
@@ -98,34 +203,41 @@ static int fanotify_event_info_len(unsigned int fid_mode,
static struct fanotify_event *get_one_event(struct fsnotify_group *group,
size_t count)
{
- size_t event_size = FAN_EVENT_METADATA_LEN;
+ size_t event_size;
struct fanotify_event *event = NULL;
- unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
+ struct fsnotify_event *fsn_event;
+ unsigned int info_mode = FAN_GROUP_FLAG(group, FANOTIFY_INFO_MODES);
pr_debug("%s: group=%p count=%zd\n", __func__, group, count);
spin_lock(&group->notification_lock);
- if (fsnotify_notify_queue_is_empty(group))
+ fsn_event = fsnotify_peek_first_event(group);
+ if (!fsn_event)
goto out;
- if (fid_mode) {
- event_size += fanotify_event_info_len(fid_mode,
- FANOTIFY_E(fsnotify_peek_first_event(group)));
- }
+ event = FANOTIFY_E(fsn_event);
+ event_size = fanotify_event_len(info_mode, event);
if (event_size > count) {
event = ERR_PTR(-EINVAL);
goto out;
}
- event = FANOTIFY_E(fsnotify_remove_first_event(group));
+
+ /*
+ * Held the notification_lock the whole time, so this is the
+ * same event we peeked above.
+ */
+ fsnotify_remove_first_event(group);
if (fanotify_is_perm_event(event->mask))
FANOTIFY_PERM(event)->state = FAN_EVENT_REPORTED;
+ if (fanotify_is_hashed_event(event->mask))
+ fanotify_unhash_event(group, event);
out:
spin_unlock(&group->notification_lock);
return event;
}
-static int create_fd(struct fsnotify_group *group, struct path *path,
+static int create_fd(struct fsnotify_group *group, const struct path *path,
struct file **file)
{
int client_fd;
@@ -140,7 +252,7 @@ static int create_fd(struct fsnotify_group *group, struct path *path,
* originally opened O_WRONLY.
*/
new_file = dentry_open(path,
- group->fanotify_data.f_flags | FMODE_NONOTIFY,
+ group->fanotify_data.f_flags | __FMODE_NONOTIFY,
current_cred());
if (IS_ERR(new_file)) {
/*
@@ -225,9 +337,31 @@ static int process_access_response(struct fsnotify_group *group,
return -ENOENT;
}
-static int copy_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
- int info_type, const char *name, size_t name_len,
- char __user *buf, size_t count)
+static size_t copy_error_info_to_user(struct fanotify_event *event,
+ char __user *buf, int count)
+{
+ struct fanotify_event_info_error info = { };
+ struct fanotify_error_event *fee = FANOTIFY_EE(event);
+
+ info.hdr.info_type = FAN_EVENT_INFO_TYPE_ERROR;
+ info.hdr.len = FANOTIFY_ERROR_INFO_LEN;
+
+ if (WARN_ON(count < info.hdr.len))
+ return -EFAULT;
+
+ info.error = fee->error;
+ info.error_count = fee->err_count;
+
+ if (copy_to_user(buf, &info, sizeof(info)))
+ return -EFAULT;
+
+ return info.hdr.len;
+}
+
+static int copy_fid_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
+ int info_type, const char *name,
+ size_t name_len,
+ char __user *buf, size_t count)
{
struct fanotify_event_info_fid info = { };
struct file_handle handle = { };
@@ -239,9 +373,6 @@ static int copy_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
pr_debug("%s: fh_len=%zu name_len=%zu, info_len=%zu, count=%zu\n",
__func__, fh_len, name_len, info_len, count);
- if (!fh_len)
- return 0;
-
if (WARN_ON_ONCE(len < sizeof(info) || len > count))
return -EFAULT;
@@ -256,6 +387,8 @@ static int copy_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
return -EFAULT;
break;
case FAN_EVENT_INFO_TYPE_DFID_NAME:
+ case FAN_EVENT_INFO_TYPE_OLD_DFID_NAME:
+ case FAN_EVENT_INFO_TYPE_NEW_DFID_NAME:
if (WARN_ON_ONCE(!name || !name_len))
return -EFAULT;
break;
@@ -276,6 +409,11 @@ static int copy_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
handle.handle_type = fh->type;
handle.handle_bytes = fh_len;
+
+ /* Mangle handle_type for bad file_handle */
+ if (!fh_len)
+ handle.handle_type = FILEID_INVALID;
+
if (copy_to_user(buf, &handle, sizeof(handle)))
return -EFAULT;
@@ -320,68 +458,79 @@ static int copy_info_to_user(__kernel_fsid_t *fsid, struct fanotify_fh *fh,
return info_len;
}
-static ssize_t copy_event_to_user(struct fsnotify_group *group,
- struct fanotify_event *event,
- char __user *buf, size_t count)
+static int copy_pidfd_info_to_user(int pidfd,
+ char __user *buf,
+ size_t count)
{
- struct fanotify_event_metadata metadata;
- struct path *path = fanotify_event_path(event);
- struct fanotify_info *info = fanotify_event_info(event);
- unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
- struct file *f = NULL;
- int ret, fd = FAN_NOFD;
- int info_type = 0;
+ struct fanotify_event_info_pidfd info = { };
+ size_t info_len = FANOTIFY_PIDFD_INFO_HDR_LEN;
- pr_debug("%s: group=%p event=%p\n", __func__, group, event);
+ if (WARN_ON_ONCE(info_len > count))
+ return -EFAULT;
- metadata.event_len = FAN_EVENT_METADATA_LEN +
- fanotify_event_info_len(fid_mode, event);
- metadata.metadata_len = FAN_EVENT_METADATA_LEN;
- metadata.vers = FANOTIFY_METADATA_VERSION;
- metadata.reserved = 0;
- metadata.mask = event->mask & FANOTIFY_OUTGOING_EVENTS;
- metadata.pid = pid_vnr(event->pid);
+ info.hdr.info_type = FAN_EVENT_INFO_TYPE_PIDFD;
+ info.hdr.len = info_len;
+ info.pidfd = pidfd;
- if (path && path->mnt && path->dentry) {
- fd = create_fd(group, path, &f);
- if (fd < 0)
- return fd;
- }
- metadata.fd = fd;
+ if (copy_to_user(buf, &info, info_len))
+ return -EFAULT;
+
+ return info_len;
+}
+
+static int copy_info_records_to_user(struct fanotify_event *event,
+ struct fanotify_info *info,
+ unsigned int info_mode, int pidfd,
+ char __user *buf, size_t count)
+{
+ int ret, total_bytes = 0, info_type = 0;
+ unsigned int fid_mode = info_mode & FANOTIFY_FID_BITS;
+ unsigned int pidfd_mode = info_mode & FAN_REPORT_PIDFD;
- ret = -EFAULT;
/*
- * Sanity check copy size in case get_one_event() and
- * event_len sizes ever get out of sync.
+ * Event info records order is as follows:
+ * 1. dir fid + name
+ * 2. (optional) new dir fid + new name
+ * 3. (optional) child fid
*/
- if (WARN_ON_ONCE(metadata.event_len > count))
- goto out_close_fd;
+ if (fanotify_event_has_dir_fh(event)) {
+ info_type = info->name_len ? FAN_EVENT_INFO_TYPE_DFID_NAME :
+ FAN_EVENT_INFO_TYPE_DFID;
- if (copy_to_user(buf, &metadata, FAN_EVENT_METADATA_LEN))
- goto out_close_fd;
+ /* FAN_RENAME uses special info types */
+ if (event->mask & FAN_RENAME)
+ info_type = FAN_EVENT_INFO_TYPE_OLD_DFID_NAME;
- buf += FAN_EVENT_METADATA_LEN;
- count -= FAN_EVENT_METADATA_LEN;
+ ret = copy_fid_info_to_user(fanotify_event_fsid(event),
+ fanotify_info_dir_fh(info),
+ info_type,
+ fanotify_info_name(info),
+ info->name_len, buf, count);
+ if (ret < 0)
+ return ret;
- if (fanotify_is_perm_event(event->mask))
- FANOTIFY_PERM(event)->fd = fd;
+ buf += ret;
+ count -= ret;
+ total_bytes += ret;
+ }
- /* Event info records order is: dir fid + name, child fid */
- if (fanotify_event_dir_fh_len(event)) {
- info_type = info->name_len ? FAN_EVENT_INFO_TYPE_DFID_NAME :
- FAN_EVENT_INFO_TYPE_DFID;
- ret = copy_info_to_user(fanotify_event_fsid(event),
- fanotify_info_dir_fh(info),
- info_type, fanotify_info_name(info),
- info->name_len, buf, count);
+ /* New dir fid+name may be reported in addition to old dir fid+name */
+ if (fanotify_event_has_dir2_fh(event)) {
+ info_type = FAN_EVENT_INFO_TYPE_NEW_DFID_NAME;
+ ret = copy_fid_info_to_user(fanotify_event_fsid(event),
+ fanotify_info_dir2_fh(info),
+ info_type,
+ fanotify_info_name2(info),
+ info->name2_len, buf, count);
if (ret < 0)
- goto out_close_fd;
+ return ret;
buf += ret;
count -= ret;
+ total_bytes += ret;
}
- if (fanotify_event_object_fh_len(event)) {
+ if (fanotify_event_has_object_fh(event)) {
const char *dot = NULL;
int dot_len = 0;
@@ -395,8 +544,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
(event->mask & FAN_ONDIR)) {
/*
* With group flag FAN_REPORT_NAME, if name was not
- * recorded in an event on a directory, report the
- * name "." with info type DFID_NAME.
+ * recorded in an event on a directory, report the name
+ * "." with info type DFID_NAME.
*/
info_type = FAN_EVENT_INFO_TYPE_DFID_NAME;
dot = ".";
@@ -419,14 +568,132 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
info_type = FAN_EVENT_INFO_TYPE_FID;
}
- ret = copy_info_to_user(fanotify_event_fsid(event),
- fanotify_event_object_fh(event),
- info_type, dot, dot_len, buf, count);
+ ret = copy_fid_info_to_user(fanotify_event_fsid(event),
+ fanotify_event_object_fh(event),
+ info_type, dot, dot_len,
+ buf, count);
if (ret < 0)
- goto out_close_fd;
+ return ret;
+
+ buf += ret;
+ count -= ret;
+ total_bytes += ret;
+ }
+
+ if (pidfd_mode) {
+ ret = copy_pidfd_info_to_user(pidfd, buf, count);
+ if (ret < 0)
+ return ret;
+
+ buf += ret;
+ count -= ret;
+ total_bytes += ret;
+ }
+ if (fanotify_is_error_event(event->mask)) {
+ ret = copy_error_info_to_user(event, buf, count);
+ if (ret < 0)
+ return ret;
buf += ret;
count -= ret;
+ total_bytes += ret;
+ }
+
+ return total_bytes;
+}
+
+static ssize_t copy_event_to_user(struct fsnotify_group *group,
+ struct fanotify_event *event,
+ char __user *buf, size_t count)
+{
+ struct fanotify_event_metadata metadata;
+ const struct path *path = fanotify_event_path(event);
+ struct fanotify_info *info = fanotify_event_info(event);
+ unsigned int info_mode = FAN_GROUP_FLAG(group, FANOTIFY_INFO_MODES);
+ unsigned int pidfd_mode = info_mode & FAN_REPORT_PIDFD;
+ struct file *f = NULL;
+ int ret, pidfd = FAN_NOPIDFD, fd = FAN_NOFD;
+
+ pr_debug("%s: group=%p event=%p\n", __func__, group, event);
+
+ metadata.event_len = fanotify_event_len(info_mode, event);
+ metadata.metadata_len = FAN_EVENT_METADATA_LEN;
+ metadata.vers = FANOTIFY_METADATA_VERSION;
+ metadata.reserved = 0;
+ metadata.mask = event->mask & FANOTIFY_OUTGOING_EVENTS;
+ metadata.pid = pid_vnr(event->pid);
+ /*
+ * For an unprivileged listener, event->pid can be used to identify the
+ * events generated by the listener process itself, without disclosing
+ * the pids of other processes.
+ */
+ if (FAN_GROUP_FLAG(group, FANOTIFY_UNPRIV) &&
+ task_tgid(current) != event->pid)
+ metadata.pid = 0;
+
+ /*
+ * For now, fid mode is required for an unprivileged listener and
+ * fid mode does not report fd in events. Keep this check anyway
+ * for safety in case fid mode requirement is relaxed in the future
+ * to allow unprivileged listener to get events with no fd and no fid.
+ */
+ if (!FAN_GROUP_FLAG(group, FANOTIFY_UNPRIV) &&
+ path && path->mnt && path->dentry) {
+ fd = create_fd(group, path, &f);
+ if (fd < 0)
+ return fd;
+ }
+ metadata.fd = fd;
+
+ if (pidfd_mode) {
+ /*
+ * Complain if the FAN_REPORT_PIDFD and FAN_REPORT_TID mutual
+ * exclusion is ever lifted. At the time of incoporating pidfd
+ * support within fanotify, the pidfd API only supported the
+ * creation of pidfds for thread-group leaders.
+ */
+ WARN_ON_ONCE(FAN_GROUP_FLAG(group, FAN_REPORT_TID));
+
+ /*
+ * The PIDTYPE_TGID check for an event->pid is performed
+ * preemptively in an attempt to catch out cases where the event
+ * listener reads events after the event generating process has
+ * already terminated. Report FAN_NOPIDFD to the event listener
+ * in those cases, with all other pidfd creation errors being
+ * reported as FAN_EPIDFD.
+ */
+ if (metadata.pid == 0 ||
+ !pid_has_task(event->pid, PIDTYPE_TGID)) {
+ pidfd = FAN_NOPIDFD;
+ } else {
+ pidfd = pidfd_create(event->pid, 0);
+ if (pidfd < 0)
+ pidfd = FAN_EPIDFD;
+ }
+ }
+
+ ret = -EFAULT;
+ /*
+ * Sanity check copy size in case get_one_event() and
+ * event_len sizes ever get out of sync.
+ */
+ if (WARN_ON_ONCE(metadata.event_len > count))
+ goto out_close_fd;
+
+ if (copy_to_user(buf, &metadata, FAN_EVENT_METADATA_LEN))
+ goto out_close_fd;
+
+ buf += FAN_EVENT_METADATA_LEN;
+ count -= FAN_EVENT_METADATA_LEN;
+
+ if (fanotify_is_perm_event(event->mask))
+ FANOTIFY_PERM(event)->fd = fd;
+
+ if (info_mode) {
+ ret = copy_info_records_to_user(event, info, info_mode, pidfd,
+ buf, count);
+ if (ret < 0)
+ goto out_close_fd;
}
if (f)
@@ -439,6 +706,10 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
put_unused_fd(fd);
fput(f);
}
+
+ if (pidfd >= 0)
+ close_fd(pidfd);
+
return ret;
}
@@ -573,6 +844,7 @@ static ssize_t fanotify_write(struct file *file, const char __user *buf, size_t
static int fanotify_release(struct inode *ignored, struct file *file)
{
struct fsnotify_group *group = file->private_data;
+ struct fsnotify_event *fsn_event;
/*
* Stop new events from arriving in the notification queue. since
@@ -601,13 +873,12 @@ static int fanotify_release(struct inode *ignored, struct file *file)
* dequeue them and set the response. They will be freed once the
* response is consumed and fanotify_get_response() returns.
*/
- while (!fsnotify_notify_queue_is_empty(group)) {
- struct fanotify_event *event;
+ while ((fsn_event = fsnotify_remove_first_event(group))) {
+ struct fanotify_event *event = FANOTIFY_E(fsn_event);
- event = FANOTIFY_E(fsnotify_remove_first_event(group));
if (!(event->mask & FANOTIFY_PERM_EVENTS)) {
spin_unlock(&group->notification_lock);
- fsnotify_destroy_event(group, &event->fse);
+ fsnotify_destroy_event(group, fsn_event);
} else {
finish_permission_event(group, FANOTIFY_PERM(event),
FAN_ALLOW);
@@ -702,7 +973,7 @@ static int fanotify_find_path(int dfd, const char __user *filename,
}
/* you can only watch an inode if you have read permissions on it */
- ret = inode_permission(path->dentry->d_inode, MAY_READ);
+ ret = path_permission(path, MAY_READ);
if (ret) {
path_put(path);
goto out;
@@ -720,27 +991,28 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
__u32 mask, unsigned int flags,
__u32 umask, int *destroy)
{
- __u32 oldmask = 0;
+ __u32 oldmask, newmask;
/* umask bits cannot be removed by user */
mask &= ~umask;
spin_lock(&fsn_mark->lock);
- if (!(flags & FAN_MARK_IGNORED_MASK)) {
- oldmask = fsn_mark->mask;
+ oldmask = fsnotify_calc_mask(fsn_mark);
+ if (!(flags & FANOTIFY_MARK_IGNORE_BITS)) {
fsn_mark->mask &= ~mask;
} else {
- fsn_mark->ignored_mask &= ~mask;
+ fsn_mark->ignore_mask &= ~mask;
}
+ newmask = fsnotify_calc_mask(fsn_mark);
/*
* We need to keep the mark around even if remaining mask cannot
* result in any events (e.g. mask == FAN_ONDIR) to support incremenal
* changes to the mask.
* Destroy mark when only umask bits remain.
*/
- *destroy = !((fsn_mark->mask | fsn_mark->ignored_mask) & ~umask);
+ *destroy = !((fsn_mark->mask | fsn_mark->ignore_mask) & ~umask);
spin_unlock(&fsn_mark->lock);
- return mask & oldmask;
+ return oldmask & ~newmask;
}
static int fanotify_remove_mark(struct fsnotify_group *group,
@@ -751,10 +1023,10 @@ static int fanotify_remove_mark(struct fsnotify_group *group,
__u32 removed;
int destroy_mark;
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
fsn_mark = fsnotify_find_mark(connp, group);
if (!fsn_mark) {
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
return -ENOENT;
}
@@ -764,7 +1036,7 @@ static int fanotify_remove_mark(struct fsnotify_group *group,
fsnotify_recalc_mask(fsn_mark->connector);
if (destroy_mark)
fsnotify_detach_mark(fsn_mark);
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
if (destroy_mark)
fsnotify_free_mark(fsn_mark);
@@ -797,76 +1069,199 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group,
flags, umask);
}
-static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
- __u32 mask,
- unsigned int flags)
+static bool fanotify_mark_update_flags(struct fsnotify_mark *fsn_mark,
+ unsigned int fan_flags)
+{
+ bool want_iref = !(fan_flags & FAN_MARK_EVICTABLE);
+ unsigned int ignore = fan_flags & FANOTIFY_MARK_IGNORE_BITS;
+ bool recalc = false;
+
+ /*
+ * When using FAN_MARK_IGNORE for the first time, mark starts using
+ * independent event flags in ignore mask. After that, trying to
+ * update the ignore mask with the old FAN_MARK_IGNORED_MASK API
+ * will result in EEXIST error.
+ */
+ if (ignore == FAN_MARK_IGNORE)
+ fsn_mark->flags |= FSNOTIFY_MARK_FLAG_HAS_IGNORE_FLAGS;
+
+ /*
+ * Setting FAN_MARK_IGNORED_SURV_MODIFY for the first time may lead to
+ * the removal of the FS_MODIFY bit in calculated mask if it was set
+ * because of an ignore mask that is now going to survive FS_MODIFY.
+ */
+ if (ignore && (fan_flags & FAN_MARK_IGNORED_SURV_MODIFY) &&
+ !(fsn_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)) {
+ fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;
+ if (!(fsn_mark->mask & FS_MODIFY))
+ recalc = true;
+ }
+
+ if (fsn_mark->connector->type != FSNOTIFY_OBJ_TYPE_INODE ||
+ want_iref == !(fsn_mark->flags & FSNOTIFY_MARK_FLAG_NO_IREF))
+ return recalc;
+
+ /*
+ * NO_IREF may be removed from a mark, but not added.
+ * When removed, fsnotify_recalc_mask() will take the inode ref.
+ */
+ WARN_ON_ONCE(!want_iref);
+ fsn_mark->flags &= ~FSNOTIFY_MARK_FLAG_NO_IREF;
+
+ return true;
+}
+
+static bool fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
+ __u32 mask, unsigned int fan_flags)
{
- __u32 oldmask = -1;
+ bool recalc;
spin_lock(&fsn_mark->lock);
- if (!(flags & FAN_MARK_IGNORED_MASK)) {
- oldmask = fsn_mark->mask;
+ if (!(fan_flags & FANOTIFY_MARK_IGNORE_BITS))
fsn_mark->mask |= mask;
- } else {
- fsn_mark->ignored_mask |= mask;
- if (flags & FAN_MARK_IGNORED_SURV_MODIFY)
- fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;
- }
+ else
+ fsn_mark->ignore_mask |= mask;
+
+ recalc = fsnotify_calc_mask(fsn_mark) &
+ ~fsnotify_conn_mask(fsn_mark->connector);
+
+ recalc |= fanotify_mark_update_flags(fsn_mark, fan_flags);
spin_unlock(&fsn_mark->lock);
- return mask & ~oldmask;
+ return recalc;
}
static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
fsnotify_connp_t *connp,
- unsigned int type,
+ unsigned int obj_type,
+ unsigned int fan_flags,
__kernel_fsid_t *fsid)
{
+ struct ucounts *ucounts = group->fanotify_data.ucounts;
struct fsnotify_mark *mark;
int ret;
- if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks)
+ /*
+ * Enforce per user marks limits per user in all containing user ns.
+ * A group with FAN_UNLIMITED_MARKS does not contribute to mark count
+ * in the limited groups account.
+ */
+ if (!FAN_GROUP_FLAG(group, FAN_UNLIMITED_MARKS) &&
+ !inc_ucount(ucounts->ns, ucounts->uid, UCOUNT_FANOTIFY_MARKS))
return ERR_PTR(-ENOSPC);
mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
- if (!mark)
- return ERR_PTR(-ENOMEM);
+ if (!mark) {
+ ret = -ENOMEM;
+ goto out_dec_ucounts;
+ }
fsnotify_init_mark(mark, group);
- ret = fsnotify_add_mark_locked(mark, connp, type, 0, fsid);
+ if (fan_flags & FAN_MARK_EVICTABLE)
+ mark->flags |= FSNOTIFY_MARK_FLAG_NO_IREF;
+
+ ret = fsnotify_add_mark_locked(mark, connp, obj_type, 0, fsid);
if (ret) {
fsnotify_put_mark(mark);
- return ERR_PTR(ret);
+ goto out_dec_ucounts;
}
return mark;
+
+out_dec_ucounts:
+ if (!FAN_GROUP_FLAG(group, FAN_UNLIMITED_MARKS))
+ dec_ucount(ucounts, UCOUNT_FANOTIFY_MARKS);
+ return ERR_PTR(ret);
}
+static int fanotify_group_init_error_pool(struct fsnotify_group *group)
+{
+ if (mempool_initialized(&group->fanotify_data.error_events_pool))
+ return 0;
+
+ return mempool_init_kmalloc_pool(&group->fanotify_data.error_events_pool,
+ FANOTIFY_DEFAULT_FEE_POOL_SIZE,
+ sizeof(struct fanotify_error_event));
+}
+
+static int fanotify_may_update_existing_mark(struct fsnotify_mark *fsn_mark,
+ unsigned int fan_flags)
+{
+ /*
+ * Non evictable mark cannot be downgraded to evictable mark.
+ */
+ if (fan_flags & FAN_MARK_EVICTABLE &&
+ !(fsn_mark->flags & FSNOTIFY_MARK_FLAG_NO_IREF))
+ return -EEXIST;
+
+ /*
+ * New ignore mask semantics cannot be downgraded to old semantics.
+ */
+ if (fan_flags & FAN_MARK_IGNORED_MASK &&
+ fsn_mark->flags & FSNOTIFY_MARK_FLAG_HAS_IGNORE_FLAGS)
+ return -EEXIST;
+
+ /*
+ * An ignore mask that survives modify could never be downgraded to not
+ * survive modify. With new FAN_MARK_IGNORE semantics we make that rule
+ * explicit and return an error when trying to update the ignore mask
+ * without the original FAN_MARK_IGNORED_SURV_MODIFY value.
+ */
+ if (fan_flags & FAN_MARK_IGNORE &&
+ !(fan_flags & FAN_MARK_IGNORED_SURV_MODIFY) &&
+ fsn_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
+ return -EEXIST;
+
+ return 0;
+}
static int fanotify_add_mark(struct fsnotify_group *group,
- fsnotify_connp_t *connp, unsigned int type,
- __u32 mask, unsigned int flags,
+ fsnotify_connp_t *connp, unsigned int obj_type,
+ __u32 mask, unsigned int fan_flags,
__kernel_fsid_t *fsid)
{
struct fsnotify_mark *fsn_mark;
- __u32 added;
+ bool recalc;
+ int ret = 0;
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
fsn_mark = fsnotify_find_mark(connp, group);
if (!fsn_mark) {
- fsn_mark = fanotify_add_new_mark(group, connp, type, fsid);
+ fsn_mark = fanotify_add_new_mark(group, connp, obj_type,
+ fan_flags, fsid);
if (IS_ERR(fsn_mark)) {
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
return PTR_ERR(fsn_mark);
}
}
- added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
- if (added & ~fsnotify_conn_mask(fsn_mark->connector))
+
+ /*
+ * Check if requested mark flags conflict with an existing mark flags.
+ */
+ ret = fanotify_may_update_existing_mark(fsn_mark, fan_flags);
+ if (ret)
+ goto out;
+
+ /*
+ * Error events are pre-allocated per group, only if strictly
+ * needed (i.e. FAN_FS_ERROR was requested).
+ */
+ if (!(fan_flags & FANOTIFY_MARK_IGNORE_BITS) &&
+ (mask & FAN_FS_ERROR)) {
+ ret = fanotify_group_init_error_pool(group);
+ if (ret)
+ goto out;
+ }
+
+ recalc = fanotify_mark_add_to_mask(fsn_mark, mask, fan_flags);
+ if (recalc)
fsnotify_recalc_mask(fsn_mark->connector);
- mutex_unlock(&group->mark_mutex);
+
+out:
+ fsnotify_group_unlock(group);
fsnotify_put_mark(fsn_mark);
- return 0;
+ return ret;
}
static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
@@ -893,10 +1288,10 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
/*
* If some other task has this inode open for write we should not add
- * an ignored mark, unless that ignored mark is supposed to survive
+ * an ignore mask, unless that ignore mask is supposed to survive
* modification changes anyway.
*/
- if ((flags & FAN_MARK_IGNORED_MASK) &&
+ if ((flags & FANOTIFY_MARK_IGNORE_BITS) &&
!(flags & FAN_MARK_IGNORED_SURV_MODIFY) &&
inode_is_open_for_write(inode))
return 0;
@@ -919,20 +1314,49 @@ static struct fsnotify_event *fanotify_alloc_overflow_event(void)
return &oevent->fse;
}
+static struct hlist_head *fanotify_alloc_merge_hash(void)
+{
+ struct hlist_head *hash;
+
+ hash = kmalloc(sizeof(struct hlist_head) << FANOTIFY_HTABLE_BITS,
+ GFP_KERNEL_ACCOUNT);
+ if (!hash)
+ return NULL;
+
+ __hash_init(hash, FANOTIFY_HTABLE_SIZE);
+
+ return hash;
+}
+
/* fanotify syscalls */
SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
{
struct fsnotify_group *group;
int f_flags, fd;
- struct user_struct *user;
unsigned int fid_mode = flags & FANOTIFY_FID_BITS;
unsigned int class = flags & FANOTIFY_CLASS_BITS;
+ unsigned int internal_flags = 0;
pr_debug("%s: flags=%x event_f_flags=%x\n",
__func__, flags, event_f_flags);
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
+ if (!capable(CAP_SYS_ADMIN)) {
+ /*
+ * An unprivileged user can setup an fanotify group with
+ * limited functionality - an unprivileged group is limited to
+ * notification events with file handles and it cannot use
+ * unlimited queue/marks.
+ */
+ if ((flags & FANOTIFY_ADMIN_INIT_FLAGS) || !fid_mode)
+ return -EPERM;
+
+ /*
+ * Setting the internal flag FANOTIFY_UNPRIV on the group
+ * prevents setting mount/filesystem marks on this group and
+ * prevents reporting pid and open fd in events.
+ */
+ internal_flags |= FANOTIFY_UNPRIV;
+ }
#ifdef CONFIG_AUDITSYSCALL
if (flags & ~(FANOTIFY_INIT_FLAGS | FAN_ENABLE_AUDIT))
@@ -941,6 +1365,14 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
#endif
return -EINVAL;
+ /*
+ * A pidfd can only be returned for a thread-group leader; thus
+ * FAN_REPORT_PIDFD and FAN_REPORT_TID need to remain mutually
+ * exclusive.
+ */
+ if ((flags & FAN_REPORT_PIDFD) && (flags & FAN_REPORT_TID))
+ return -EINVAL;
+
if (event_f_flags & ~FANOTIFY_INIT_ALL_EVENT_F_BITS)
return -EINVAL;
@@ -963,30 +1395,46 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
if ((fid_mode & FAN_REPORT_NAME) && !(fid_mode & FAN_REPORT_DIR_FID))
return -EINVAL;
- user = get_current_user();
- if (atomic_read(&user->fanotify_listeners) > FANOTIFY_DEFAULT_MAX_LISTENERS) {
- free_uid(user);
- return -EMFILE;
- }
+ /*
+ * FAN_REPORT_TARGET_FID requires FAN_REPORT_NAME and FAN_REPORT_FID
+ * and is used as an indication to report both dir and child fid on all
+ * dirent events.
+ */
+ if ((fid_mode & FAN_REPORT_TARGET_FID) &&
+ (!(fid_mode & FAN_REPORT_NAME) || !(fid_mode & FAN_REPORT_FID)))
+ return -EINVAL;
- f_flags = O_RDWR | FMODE_NONOTIFY;
+ f_flags = O_RDWR | __FMODE_NONOTIFY;
if (flags & FAN_CLOEXEC)
f_flags |= O_CLOEXEC;
if (flags & FAN_NONBLOCK)
f_flags |= O_NONBLOCK;
/* fsnotify_alloc_group takes a ref. Dropped in fanotify_release */
- group = fsnotify_alloc_group(&fanotify_fsnotify_ops);
+ group = fsnotify_alloc_group(&fanotify_fsnotify_ops,
+ FSNOTIFY_GROUP_USER | FSNOTIFY_GROUP_NOFS);
if (IS_ERR(group)) {
- free_uid(user);
return PTR_ERR(group);
}
- group->fanotify_data.user = user;
- group->fanotify_data.flags = flags;
- atomic_inc(&user->fanotify_listeners);
+ /* Enforce groups limits per user in all containing user ns */
+ group->fanotify_data.ucounts = inc_ucount(current_user_ns(),
+ current_euid(),
+ UCOUNT_FANOTIFY_GROUPS);
+ if (!group->fanotify_data.ucounts) {
+ fd = -EMFILE;
+ goto out_destroy_group;
+ }
+
+ group->fanotify_data.flags = flags | internal_flags;
group->memcg = get_mem_cgroup_from_mm(current->mm);
+ group->fanotify_data.merge_hash = fanotify_alloc_merge_hash();
+ if (!group->fanotify_data.merge_hash) {
+ fd = -ENOMEM;
+ goto out_destroy_group;
+ }
+
group->overflow_event = fanotify_alloc_overflow_event();
if (unlikely(!group->overflow_event)) {
fd = -ENOMEM;
@@ -1019,16 +1467,13 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
goto out_destroy_group;
group->max_events = UINT_MAX;
} else {
- group->max_events = FANOTIFY_DEFAULT_MAX_EVENTS;
+ group->max_events = fanotify_max_queued_events;
}
if (flags & FAN_UNLIMITED_MARKS) {
fd = -EPERM;
if (!capable(CAP_SYS_ADMIN))
goto out_destroy_group;
- group->fanotify_data.max_marks = UINT_MAX;
- } else {
- group->fanotify_data.max_marks = FANOTIFY_DEFAULT_MAX_MARKS;
}
if (flags & FAN_ENABLE_AUDIT) {
@@ -1048,16 +1493,15 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
return fd;
}
-/* Check if filesystem can encode a unique fid */
-static int fanotify_test_fid(struct path *path, __kernel_fsid_t *fsid)
+static int fanotify_test_fsid(struct dentry *dentry, __kernel_fsid_t *fsid)
{
__kernel_fsid_t root_fsid;
int err;
/*
- * Make sure path is not in filesystem with zero fsid (e.g. tmpfs).
+ * Make sure dentry is not of a filesystem with zero fsid (e.g. fuse).
*/
- err = vfs_get_fsid(path->dentry, fsid);
+ err = vfs_get_fsid(dentry, fsid);
if (err)
return err;
@@ -1065,10 +1509,10 @@ static int fanotify_test_fid(struct path *path, __kernel_fsid_t *fsid)
return -ENODEV;
/*
- * Make sure path is not inside a filesystem subvolume (e.g. btrfs)
+ * Make sure dentry is not of a filesystem subvolume (e.g. btrfs)
* which uses a different fsid than sb root.
*/
- err = vfs_get_fsid(path->dentry->d_sb->s_root, &root_fsid);
+ err = vfs_get_fsid(dentry->d_sb->s_root, &root_fsid);
if (err)
return err;
@@ -1076,6 +1520,12 @@ static int fanotify_test_fid(struct path *path, __kernel_fsid_t *fsid)
root_fsid.val[1] != fsid->val[1])
return -EXDEV;
+ return 0;
+}
+
+/* Check if filesystem can encode a unique fid */
+static int fanotify_test_fid(struct dentry *dentry)
+{
/*
* We need to make sure that the file system supports at least
* encoding a file handle so user can use name_to_handle_at() to
@@ -1083,17 +1533,22 @@ static int fanotify_test_fid(struct path *path, __kernel_fsid_t *fsid)
* objects. However, name_to_handle_at() requires that the
* filesystem also supports decoding file handles.
*/
- if (!path->dentry->d_sb->s_export_op ||
- !path->dentry->d_sb->s_export_op->fh_to_dentry)
+ if (!dentry->d_sb->s_export_op ||
+ !dentry->d_sb->s_export_op->fh_to_dentry)
return -EOPNOTSUPP;
return 0;
}
-static int fanotify_events_supported(struct path *path, __u64 mask,
+static int fanotify_events_supported(struct fsnotify_group *group,
+ const struct path *path, __u64 mask,
unsigned int flags)
{
unsigned int mark_type = flags & FANOTIFY_MARK_TYPE_BITS;
+ /* Strict validation of events in non-dir inode mask with v5.17+ APIs */
+ bool strict_dir_events = FAN_GROUP_FLAG(group, FAN_REPORT_TARGET_FID) ||
+ (mask & FAN_RENAME) ||
+ (flags & FAN_MARK_IGNORE);
/*
* Some filesystems such as 'proc' acquire unusual locks when opening
@@ -1121,6 +1576,15 @@ static int fanotify_events_supported(struct path *path, __u64 mask,
path->mnt->mnt_sb->s_flags & SB_NOUSER)
return -EINVAL;
+ /*
+ * We shouldn't have allowed setting dirent events and the directory
+ * flags FAN_ONDIR and FAN_EVENT_ON_CHILD in mask of non-dir inode,
+ * but because we always allowed it, error only when using new APIs.
+ */
+ if (strict_dir_events && mark_type == FAN_MARK_INODE &&
+ !d_is_dir(path->dentry) && (mask & FANOTIFY_DIRONLY_EVENT_BITS))
+ return -ENOTDIR;
+
return 0;
}
@@ -1135,7 +1599,8 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
__kernel_fsid_t __fsid, *fsid = NULL;
u32 valid_mask = FANOTIFY_EVENTS | FANOTIFY_EVENT_FLAGS;
unsigned int mark_type = flags & FANOTIFY_MARK_TYPE_BITS;
- bool ignored = flags & FAN_MARK_IGNORED_MASK;
+ unsigned int mark_cmd = flags & FANOTIFY_MARK_CMD_BITS;
+ unsigned int ignore = flags & FANOTIFY_MARK_IGNORE_BITS;
unsigned int obj_type, fid_mode;
u32 umask = 0;
int ret;
@@ -1144,7 +1609,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
__func__, fanotify_fd, flags, dfd, pathname, mask);
/* we only use the lower 32 bits as of right now. */
- if (mask & ((__u64)0xffffffff << 32))
+ if (upper_32_bits(mask))
return -EINVAL;
if (flags & ~FANOTIFY_MARK_FLAGS)
@@ -1164,7 +1629,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
return -EINVAL;
}
- switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
+ switch (mark_cmd) {
case FAN_MARK_ADD:
case FAN_MARK_REMOVE:
if (!mask)
@@ -1184,9 +1649,19 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
if (mask & ~valid_mask)
return -EINVAL;
- /* Event flags (ONDIR, ON_CHILD) are meaningless in ignored mask */
- if (ignored)
+
+ /* We don't allow FAN_MARK_IGNORE & FAN_MARK_IGNORED_MASK together */
+ if (ignore == (FAN_MARK_IGNORE | FAN_MARK_IGNORED_MASK))
+ return -EINVAL;
+
+ /*
+ * Event flags (FAN_ONDIR, FAN_EVENT_ON_CHILD) have no effect with
+ * FAN_MARK_IGNORED_MASK.
+ */
+ if (ignore == FAN_MARK_IGNORED_MASK) {
mask &= ~FANOTIFY_EVENT_FLAGS;
+ umask = FANOTIFY_EVENT_FLAGS;
+ }
f = fdget(fanotify_fd);
if (unlikely(!f.file))
@@ -1198,6 +1673,17 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
goto fput_and_out;
group = f.file->private_data;
+ /*
+ * An unprivileged user is not allowed to setup mount nor filesystem
+ * marks. This also includes setting up such marks by a group that
+ * was initialized by an unprivileged user.
+ */
+ ret = -EPERM;
+ if ((!capable(CAP_SYS_ADMIN) ||
+ FAN_GROUP_FLAG(group, FANOTIFY_UNPRIV)) &&
+ mark_type != FAN_MARK_INODE)
+ goto fput_and_out;
+
/*
* group->priority == FS_PRIO_0 == FAN_CLASS_NOTIF. These are not
* allowed to set permissions events.
@@ -1207,19 +1693,39 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
group->priority == FS_PRIO_0)
goto fput_and_out;
+ if (mask & FAN_FS_ERROR &&
+ mark_type != FAN_MARK_FILESYSTEM)
+ goto fput_and_out;
+
+ /*
+ * Evictable is only relevant for inode marks, because only inode object
+ * can be evicted on memory pressure.
+ */
+ if (flags & FAN_MARK_EVICTABLE &&
+ mark_type != FAN_MARK_INODE)
+ goto fput_and_out;
+
/*
- * Events with data type inode do not carry enough information to report
- * event->fd, so we do not allow setting a mask for inode events unless
- * group supports reporting fid.
- * inode events are not supported on a mount mark, because they do not
- * carry enough information (i.e. path) to be filtered by mount point.
+ * Events that do not carry enough information to report
+ * event->fd require a group that supports reporting fid. Those
+ * events are not supported on a mount mark, because they do not
+ * carry enough information (i.e. path) to be filtered by mount
+ * point.
*/
fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS);
- if (mask & FANOTIFY_INODE_EVENTS &&
+ if (mask & ~(FANOTIFY_FD_EVENTS|FANOTIFY_EVENT_FLAGS) &&
(!fid_mode || mark_type == FAN_MARK_MOUNT))
goto fput_and_out;
- if (flags & FAN_MARK_FLUSH) {
+ /*
+ * FAN_RENAME uses special info type records to report the old and
+ * new parent+name. Reporting only old and new parent id is less
+ * useful and was not implemented.
+ */
+ if (mask & FAN_RENAME && !(fid_mode & FAN_REPORT_NAME))
+ goto fput_and_out;
+
+ if (mark_cmd == FAN_MARK_FLUSH) {
ret = 0;
if (mark_type == FAN_MARK_MOUNT)
fsnotify_clear_vfsmount_marks_by_group(group);
@@ -1235,14 +1741,18 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
if (ret)
goto fput_and_out;
- if (flags & FAN_MARK_ADD) {
- ret = fanotify_events_supported(&path, mask, flags);
+ if (mark_cmd == FAN_MARK_ADD) {
+ ret = fanotify_events_supported(group, &path, mask, flags);
if (ret)
goto path_put_and_out;
}
if (fid_mode) {
- ret = fanotify_test_fid(&path, &__fsid);
+ ret = fanotify_test_fsid(path.dentry, &__fsid);
+ if (ret)
+ goto path_put_and_out;
+
+ ret = fanotify_test_fid(path.dentry);
if (ret)
goto path_put_and_out;
@@ -1255,6 +1765,13 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
else
mnt = path.mnt;
+ ret = mnt ? -EINVAL : -EISDIR;
+ /* FAN_MARK_IGNORE requires SURV_MODIFY for sb/mount/dir marks */
+ if (mark_cmd == FAN_MARK_ADD && ignore == FAN_MARK_IGNORE &&
+ (mnt || S_ISDIR(inode->i_mode)) &&
+ !(flags & FAN_MARK_IGNORED_SURV_MODIFY))
+ goto path_put_and_out;
+
/* Mask out FAN_EVENT_ON_CHILD flag for sb/mount/non-dir marks */
if (mnt || !S_ISDIR(inode->i_mode)) {
mask &= ~FAN_EVENT_ON_CHILD;
@@ -1264,12 +1781,12 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
* events with parent/name info for non-directory.
*/
if ((fid_mode & FAN_REPORT_DIR_FID) &&
- (flags & FAN_MARK_ADD) && !ignored)
+ (flags & FAN_MARK_ADD) && !ignore)
mask |= FAN_EVENT_ON_CHILD;
}
/* create/update an inode mark */
- switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE)) {
+ switch (mark_cmd) {
case FAN_MARK_ADD:
if (mark_type == FAN_MARK_MOUNT)
ret = fanotify_add_vfsmount_mark(group, mnt, mask,
@@ -1330,8 +1847,24 @@ SYSCALL32_DEFINE6(fanotify_mark,
*/
static int __init fanotify_user_setup(void)
{
- BUILD_BUG_ON(HWEIGHT32(FANOTIFY_INIT_FLAGS) != 10);
- BUILD_BUG_ON(HWEIGHT32(FANOTIFY_MARK_FLAGS) != 9);
+ struct sysinfo si;
+ int max_marks;
+
+ si_meminfo(&si);
+ /*
+ * Allow up to 1% of addressable memory to be accounted for per user
+ * marks limited to the range [8192, 1048576]. mount and sb marks are
+ * a lot cheaper than inode marks, but there is no reason for a user
+ * to have many of those, so calculate by the cost of inode marks.
+ */
+ max_marks = (((si.totalram - si.totalhigh) / 100) << PAGE_SHIFT) /
+ INODE_MARK_COST;
+ max_marks = clamp(max_marks, FANOTIFY_OLD_DEFAULT_MAX_MARKS,
+ FANOTIFY_DEFAULT_MAX_USER_MARKS);
+
+ BUILD_BUG_ON(FANOTIFY_INIT_FLAGS & FANOTIFY_INTERNAL_GROUP_FLAGS);
+ BUILD_BUG_ON(HWEIGHT32(FANOTIFY_INIT_FLAGS) != 12);
+ BUILD_BUG_ON(HWEIGHT32(FANOTIFY_MARK_FLAGS) != 11);
fanotify_mark_cache = KMEM_CACHE(fsnotify_mark,
SLAB_PANIC|SLAB_ACCOUNT);
@@ -1344,6 +1877,11 @@ static int __init fanotify_user_setup(void)
KMEM_CACHE(fanotify_perm_event, SLAB_PANIC);
}
+ fanotify_max_queued_events = FANOTIFY_DEFAULT_MAX_EVENTS;
+ init_user_ns.ucount_max[UCOUNT_FANOTIFY_GROUPS] =
+ FANOTIFY_DEFAULT_MAX_GROUPS;
+ init_user_ns.ucount_max[UCOUNT_FANOTIFY_MARKS] = max_marks;
+
return 0;
}
device_initcall(fanotify_user_setup);
diff --git a/fs/notify/fdinfo.c b/fs/notify/fdinfo.c
index 765b50aeadd2..55081ae3a6ec 100644
--- a/fs/notify/fdinfo.c
+++ b/fs/notify/fdinfo.c
@@ -14,6 +14,7 @@
#include <linux/exportfs.h>
#include "inotify/inotify.h"
+#include "fanotify/fanotify.h"
#include "fdinfo.h"
#include "fsnotify.h"
@@ -28,13 +29,13 @@ static void show_fdinfo(struct seq_file *m, struct file *f,
struct fsnotify_group *group = f->private_data;
struct fsnotify_mark *mark;
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
list_for_each_entry(mark, &group->marks_list, g_list) {
show(m, mark);
if (seq_has_overflowed(m))
break;
}
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
}
#if defined(CONFIG_EXPORTFS)
@@ -103,19 +104,16 @@ void inotify_show_fdinfo(struct seq_file *m, struct file *f)
static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
{
- unsigned int mflags = 0;
+ unsigned int mflags = fanotify_mark_user_flags(mark);
struct inode *inode;
- if (mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY)
- mflags |= FAN_MARK_IGNORED_SURV_MODIFY;
-
if (mark->connector->type == FSNOTIFY_OBJ_TYPE_INODE) {
inode = igrab(fsnotify_conn_inode(mark->connector));
if (!inode)
return;
seq_printf(m, "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x ",
inode->i_ino, inode->i_sb->s_dev,
- mflags, mark->mask, mark->ignored_mask);
+ mflags, mark->mask, mark->ignore_mask);
show_mark_fhandle(m, inode);
seq_putc(m, '\n');
iput(inode);
@@ -123,12 +121,12 @@ static void fanotify_fdinfo(struct seq_file *m, struct fsnotify_mark *mark)
struct mount *mnt = fsnotify_conn_mount(mark->connector);
seq_printf(m, "fanotify mnt_id:%x mflags:%x mask:%x ignored_mask:%x\n",
- mnt->mnt_id, mflags, mark->mask, mark->ignored_mask);
+ mnt->mnt_id, mflags, mark->mask, mark->ignore_mask);
} else if (mark->connector->type == FSNOTIFY_OBJ_TYPE_SB) {
struct super_block *sb = fsnotify_conn_sb(mark->connector);
seq_printf(m, "fanotify sdev:%x mflags:%x mask:%x ignored_mask:%x\n",
- sb->s_dev, mflags, mark->mask, mark->ignored_mask);
+ sb->s_dev, mflags, mark->mask, mark->ignore_mask);
}
}
@@ -137,7 +135,8 @@ void fanotify_show_fdinfo(struct seq_file *m, struct file *f)
struct fsnotify_group *group = f->private_data;
seq_printf(m, "fanotify flags:%x event-flags:%x\n",
- group->fanotify_data.flags, group->fanotify_data.f_flags);
+ group->fanotify_data.flags & FANOTIFY_INIT_FLAGS,
+ group->fanotify_data.f_flags);
show_fdinfo(m, f, fanotify_fdinfo);
}
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 30d422b8c0fc..7974e91ffe13 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -70,8 +70,7 @@ static void fsnotify_unmount_inodes(struct super_block *sb)
spin_unlock(&inode->i_lock);
spin_unlock(&sb->s_inode_list_lock);
- if (iput_inode)
- iput(iput_inode);
+ iput(iput_inode);
/* for each watch, send FS_UNMOUNT and then remove it */
fsnotify_inode(inode, FS_UNMOUNT);
@@ -85,24 +84,23 @@ static void fsnotify_unmount_inodes(struct super_block *sb)
}
spin_unlock(&sb->s_inode_list_lock);
- if (iput_inode)
- iput(iput_inode);
- /* Wait for outstanding inode references from connectors */
- wait_var_event(&sb->s_fsnotify_inode_refs,
- !atomic_long_read(&sb->s_fsnotify_inode_refs));
+ iput(iput_inode);
}
void fsnotify_sb_delete(struct super_block *sb)
{
fsnotify_unmount_inodes(sb);
fsnotify_clear_marks_by_sb(sb);
+ /* Wait for outstanding object references from connectors */
+ wait_var_event(&sb->s_fsnotify_connectors,
+ !atomic_long_read(&sb->s_fsnotify_connectors));
}
/*
* Given an inode, first check if we care what happens to our children. Inotify
* and dnotify both tell their parents about events. If we care about any event
* on a child we run all of our children and set a dentry flag saying that the
- * parent cares. Thus when an event happens on a child it can quickly tell if
+ * parent cares. Thus when an event happens on a child it can quickly tell
* if there is a need to find a parent and send the event to the parent.
*/
void __fsnotify_update_child_dentry_flags(struct inode *inode)
@@ -252,7 +250,10 @@ static int fsnotify_handle_inode_event(struct fsnotify_group *group,
if (WARN_ON_ONCE(!ops->handle_inode_event))
return 0;
- if ((inode_mark->mask & FS_EXCL_UNLINK) &&
+ if (WARN_ON_ONCE(!inode && !dir))
+ return 0;
+
+ if ((inode_mark->flags & FSNOTIFY_MARK_FLAG_EXCL_UNLINK) &&
path && d_unlinked(path->dentry))
return 0;
@@ -276,23 +277,28 @@ static int fsnotify_handle_event(struct fsnotify_group *group, __u32 mask,
WARN_ON_ONCE(fsnotify_iter_vfsmount_mark(iter_info)))
return 0;
- if (parent_mark) {
- /*
- * parent_mark indicates that the parent inode is watching
- * children and interested in this event, which is an event
- * possible on child. But is *this mark* watching children and
- * interested in this event?
- */
- if (parent_mark->mask & FS_EVENT_ON_CHILD) {
- ret = fsnotify_handle_inode_event(group, parent_mark, mask,
- data, data_type, dir, name, 0);
- if (ret)
- return ret;
- }
- if (!inode_mark)
+ /*
+ * For FS_RENAME, 'dir' is old dir and 'data' is new dentry.
+ * The only ->handle_inode_event() backend that supports FS_RENAME is
+ * dnotify, where it means file was renamed within same parent.
+ */
+ if (mask & FS_RENAME) {
+ struct dentry *moved = fsnotify_data_dentry(data, data_type);
+
+ if (dir != moved->d_parent->d_inode)
return 0;
}
+ if (parent_mark) {
+ ret = fsnotify_handle_inode_event(group, parent_mark, mask,
+ data, data_type, dir, name, 0);
+ if (ret)
+ return ret;
+ }
+
+ if (!inode_mark)
+ return 0;
+
if (mask & FS_EVENT_ON_CHILD) {
/*
* Some events can be sent on both parent dir and child marks
@@ -318,42 +324,36 @@ static int send_to_group(__u32 mask, const void *data, int data_type,
struct fsnotify_group *group = NULL;
__u32 test_mask = (mask & ALL_FSNOTIFY_EVENTS);
__u32 marks_mask = 0;
- __u32 marks_ignored_mask = 0;
+ __u32 marks_ignore_mask = 0;
+ bool is_dir = mask & FS_ISDIR;
struct fsnotify_mark *mark;
int type;
- if (WARN_ON(!iter_info->report_mask))
+ if (!iter_info->report_mask)
return 0;
/* clear ignored on inode modification */
if (mask & FS_MODIFY) {
- fsnotify_foreach_obj_type(type) {
- if (!fsnotify_iter_should_report_type(iter_info, type))
- continue;
- mark = iter_info->marks[type];
- if (mark &&
- !(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
- mark->ignored_mask = 0;
+ fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
+ if (!(mark->flags &
+ FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
+ mark->ignore_mask = 0;
}
}
- fsnotify_foreach_obj_type(type) {
- if (!fsnotify_iter_should_report_type(iter_info, type))
- continue;
- mark = iter_info->marks[type];
- /* does the object mark tell us to do something? */
- if (mark) {
- group = mark->group;
- marks_mask |= mark->mask;
- marks_ignored_mask |= mark->ignored_mask;
- }
+ /* Are any of the group marks interested in this event? */
+ fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
+ group = mark->group;
+ marks_mask |= mark->mask;
+ marks_ignore_mask |=
+ fsnotify_effective_ignore_mask(mark, is_dir, type);
}
- pr_debug("%s: group=%p mask=%x marks_mask=%x marks_ignored_mask=%x data=%p data_type=%d dir=%p cookie=%d\n",
- __func__, group, mask, marks_mask, marks_ignored_mask,
+ pr_debug("%s: group=%p mask=%x marks_mask=%x marks_ignore_mask=%x data=%p data_type=%d dir=%p cookie=%d\n",
+ __func__, group, mask, marks_mask, marks_ignore_mask,
data, data_type, dir, cookie);
- if (!(test_mask & marks_mask & ~marks_ignored_mask))
+ if (!(test_mask & marks_mask & ~marks_ignore_mask))
return 0;
if (group->ops->handle_event) {
@@ -390,11 +390,11 @@ static struct fsnotify_mark *fsnotify_next_mark(struct fsnotify_mark *mark)
/*
* iter_info is a multi head priority queue of marks.
- * Pick a subset of marks from queue heads, all with the
- * same group and set the report_mask for selected subset.
- * Returns the report_mask of the selected subset.
+ * Pick a subset of marks from queue heads, all with the same group
+ * and set the report_mask to a subset of the selected marks.
+ * Returns false if there are no more groups to iterate.
*/
-static unsigned int fsnotify_iter_select_report_types(
+static bool fsnotify_iter_select_report_types(
struct fsnotify_iter_info *iter_info)
{
struct fsnotify_group *max_prio_group = NULL;
@@ -402,7 +402,7 @@ static unsigned int fsnotify_iter_select_report_types(
int type;
/* Choose max prio group among groups of all queue heads */
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
mark = iter_info->marks[type];
if (mark &&
fsnotify_compare_groups(max_prio_group, mark->group) > 0)
@@ -410,30 +410,49 @@ static unsigned int fsnotify_iter_select_report_types(
}
if (!max_prio_group)
- return 0;
+ return false;
/* Set the report mask for marks from same group as max prio group */
+ iter_info->current_group = max_prio_group;
iter_info->report_mask = 0;
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
mark = iter_info->marks[type];
- if (mark &&
- fsnotify_compare_groups(max_prio_group, mark->group) == 0)
+ if (mark && mark->group == iter_info->current_group) {
+ /*
+ * FSNOTIFY_ITER_TYPE_PARENT indicates that this inode
+ * is watching children and interested in this event,
+ * which is an event possible on child.
+ * But is *this mark* watching children?
+ */
+ if (type == FSNOTIFY_ITER_TYPE_PARENT &&
+ !(mark->mask & FS_EVENT_ON_CHILD) &&
+ !(fsnotify_ignore_mask(mark) & FS_EVENT_ON_CHILD))
+ continue;
+
fsnotify_iter_set_report_type(iter_info, type);
+ }
}
- return iter_info->report_mask;
+ return true;
}
/*
- * Pop from iter_info multi head queue, the marks that were iterated in the
+ * Pop from iter_info multi head queue, the marks that belong to the group of
* current iteration step.
*/
static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
{
+ struct fsnotify_mark *mark;
int type;
- fsnotify_foreach_obj_type(type) {
- if (fsnotify_iter_should_report_type(iter_info, type))
+ /*
+ * We cannot use fsnotify_foreach_iter_mark_type() here because we
+ * may need to advance a mark of type X that belongs to current_group
+ * but was not selected for reporting.
+ */
+ fsnotify_foreach_iter_type(type) {
+ mark = iter_info->marks[type];
+ if (mark && mark->group == iter_info->current_group)
iter_info->marks[type] =
fsnotify_next_mark(iter_info->marks[type]);
}
@@ -455,18 +474,20 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
* @file_name is relative to
* @file_name: optional file name associated with event
* @inode: optional inode associated with event -
- * either @dir or @inode must be non-NULL.
- * if both are non-NULL event may be reported to both.
+ * If @dir and @inode are both non-NULL, event may be
+ * reported to both.
* @cookie: inotify rename cookie
*/
int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
const struct qstr *file_name, struct inode *inode, u32 cookie)
{
const struct path *path = fsnotify_data_path(data, data_type);
+ struct super_block *sb = fsnotify_data_sb(data, data_type);
struct fsnotify_iter_info iter_info = {};
- struct super_block *sb;
struct mount *mnt = NULL;
- struct inode *parent = NULL;
+ struct inode *inode2 = NULL;
+ struct dentry *moved;
+ int inode2_type;
int ret = 0;
__u32 test_mask, marks_mask;
@@ -476,14 +497,20 @@ int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
if (!inode) {
/* Dirent event - report on TYPE_INODE to dir */
inode = dir;
+ /* For FS_RENAME, inode is old_dir and inode2 is new_dir */
+ if (mask & FS_RENAME) {
+ moved = fsnotify_data_dentry(data, data_type);
+ inode2 = moved->d_parent->d_inode;
+ inode2_type = FSNOTIFY_ITER_TYPE_INODE2;
+ }
} else if (mask & FS_EVENT_ON_CHILD) {
/*
* Event on child - report on TYPE_PARENT to dir if it is
* watching children and on TYPE_INODE to child.
*/
- parent = dir;
+ inode2 = dir;
+ inode2_type = FSNOTIFY_ITER_TYPE_PARENT;
}
- sb = inode->i_sb;
/*
* Optimization: srcu_read_lock() has a memory barrier which can
@@ -495,7 +522,7 @@ int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
if (!sb->s_fsnotify_marks &&
(!mnt || !mnt->mnt_fsnotify_marks) &&
(!inode || !inode->i_fsnotify_marks) &&
- (!parent || !parent->i_fsnotify_marks))
+ (!inode2 || !inode2->i_fsnotify_marks))
return 0;
marks_mask = sb->s_fsnotify_mask;
@@ -503,33 +530,35 @@ int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
marks_mask |= mnt->mnt_fsnotify_mask;
if (inode)
marks_mask |= inode->i_fsnotify_mask;
- if (parent)
- marks_mask |= parent->i_fsnotify_mask;
+ if (inode2)
+ marks_mask |= inode2->i_fsnotify_mask;
/*
- * if this is a modify event we may need to clear the ignored masks
- * otherwise return if none of the marks care about this type of event.
+ * If this is a modify event we may need to clear some ignore masks.
+ * In that case, the object with ignore masks will have the FS_MODIFY
+ * event in its mask.
+ * Otherwise, return if none of the marks care about this type of event.
*/
test_mask = (mask & ALL_FSNOTIFY_EVENTS);
- if (!(mask & FS_MODIFY) && !(test_mask & marks_mask))
+ if (!(test_mask & marks_mask))
return 0;
iter_info.srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
- iter_info.marks[FSNOTIFY_OBJ_TYPE_SB] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_SB] =
fsnotify_first_mark(&sb->s_fsnotify_marks);
if (mnt) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_VFSMOUNT] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_VFSMOUNT] =
fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
}
if (inode) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
+ iter_info.marks[FSNOTIFY_ITER_TYPE_INODE] =
fsnotify_first_mark(&inode->i_fsnotify_marks);
}
- if (parent) {
- iter_info.marks[FSNOTIFY_OBJ_TYPE_PARENT] =
- fsnotify_first_mark(&parent->i_fsnotify_marks);
+ if (inode2) {
+ iter_info.marks[inode2_type] =
+ fsnotify_first_mark(&inode2->i_fsnotify_marks);
}
/*
@@ -558,7 +587,7 @@ static __init int fsnotify_init(void)
{
int ret;
- BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 25);
+ BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 23);
ret = init_srcu_struct(&fsnotify_mark_srcu);
if (ret)
diff --git a/fs/notify/fsnotify.h b/fs/notify/fsnotify.h
index ff2063ec6b0f..fde74eb333cc 100644
--- a/fs/notify/fsnotify.h
+++ b/fs/notify/fsnotify.h
@@ -27,6 +27,21 @@ static inline struct super_block *fsnotify_conn_sb(
return container_of(conn->obj, struct super_block, s_fsnotify_marks);
}
+static inline struct super_block *fsnotify_connector_sb(
+ struct fsnotify_mark_connector *conn)
+{
+ switch (conn->type) {
+ case FSNOTIFY_OBJ_TYPE_INODE:
+ return fsnotify_conn_inode(conn)->i_sb;
+ case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
+ return fsnotify_conn_mount(conn)->mnt.mnt_sb;
+ case FSNOTIFY_OBJ_TYPE_SB:
+ return fsnotify_conn_sb(conn);
+ default:
+ return NULL;
+ }
+}
+
/* destroy all events sitting in this groups notification queue */
extern void fsnotify_flush_notify(struct fsnotify_group *group);
@@ -61,10 +76,6 @@ static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
*/
extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
-/* allocate and destroy and event holder to attach events to notification/access queues */
-extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
-extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
-
extern struct kmem_cache *fsnotify_mark_connector_cachep;
#endif /* __FS_NOTIFY_FSNOTIFY_H_ */
diff --git a/fs/notify/group.c b/fs/notify/group.c
index a4a4b1c64d32..1de6631a3925 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -58,7 +58,7 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
fsnotify_group_stop_queueing(group);
/* Clear all marks for this group and queue them for destruction */
- fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_ALL_TYPES_MASK);
+ fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_ANY);
/*
* Some marks can still be pinned when waiting for response from
@@ -88,7 +88,7 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
* that deliberately ignores overflow events.
*/
if (group->overflow_event)
- group->ops->free_event(group->overflow_event);
+ group->ops->free_event(group, group->overflow_event);
fsnotify_put_group(group);
}
@@ -111,20 +111,19 @@ void fsnotify_put_group(struct fsnotify_group *group)
}
EXPORT_SYMBOL_GPL(fsnotify_put_group);
-/*
- * Create a new fsnotify_group and hold a reference for the group returned.
- */
-struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
+static struct fsnotify_group *__fsnotify_alloc_group(
+ const struct fsnotify_ops *ops,
+ int flags, gfp_t gfp)
{
+ static struct lock_class_key nofs_marks_lock;
struct fsnotify_group *group;
- group = kzalloc(sizeof(struct fsnotify_group), GFP_KERNEL);
+ group = kzalloc(sizeof(struct fsnotify_group), gfp);
if (!group)
return ERR_PTR(-ENOMEM);
/* set to 0 when there a no external references to this group */
refcount_set(&group->refcnt, 1);
- atomic_set(&group->num_marks, 0);
atomic_set(&group->user_waits, 0);
spin_lock_init(&group->notification_lock);
@@ -136,9 +135,32 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
INIT_LIST_HEAD(&group->marks_list);
group->ops = ops;
+ group->flags = flags;
+ /*
+ * For most backends, eviction of inode with a mark is not expected,
+ * because marks hold a refcount on the inode against eviction.
+ *
+ * Use a different lockdep class for groups that support evictable
+ * inode marks, because with evictable marks, mark_mutex is NOT
+ * fs-reclaim safe - the mutex is taken when evicting inodes.
+ */
+ if (flags & FSNOTIFY_GROUP_NOFS)
+ lockdep_set_class(&group->mark_mutex, &nofs_marks_lock);
return group;
}
+
+/*
+ * Create a new fsnotify_group and hold a reference for the group returned.
+ */
+struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops,
+ int flags)
+{
+ gfp_t gfp = (flags & FSNOTIFY_GROUP_USER) ? GFP_KERNEL_ACCOUNT :
+ GFP_KERNEL;
+
+ return __fsnotify_alloc_group(ops, flags, gfp);
+}
EXPORT_SYMBOL_GPL(fsnotify_alloc_group);
int fsnotify_fasync(int fd, struct file *file, int on)
diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h
index 8f00151eb731..7d5df7a21539 100644
--- a/fs/notify/inotify/inotify.h
+++ b/fs/notify/inotify/inotify.h
@@ -27,11 +27,18 @@ static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse)
* userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is
* used only internally to the kernel.
*/
-#define INOTIFY_USER_MASK (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK)
+#define INOTIFY_USER_MASK (IN_ALL_EVENTS)
static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark)
{
- return fsn_mark->mask & INOTIFY_USER_MASK;
+ __u32 mask = fsn_mark->mask & INOTIFY_USER_MASK;
+
+ if (fsn_mark->flags & FSNOTIFY_MARK_FLAG_EXCL_UNLINK)
+ mask |= IN_EXCL_UNLINK;
+ if (fsn_mark->flags & FSNOTIFY_MARK_FLAG_IN_ONESHOT)
+ mask |= IN_ONESHOT;
+
+ return mask;
}
extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 66991c7fef9e..993375f0db67 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -46,9 +46,10 @@ static bool event_compare(struct fsnotify_event *old_fsn,
return false;
}
-static int inotify_merge(struct list_head *list,
- struct fsnotify_event *event)
+static int inotify_merge(struct fsnotify_group *group,
+ struct fsnotify_event *event)
{
+ struct list_head *list = &group->notification_list;
struct fsnotify_event *last_event;
last_event = list_entry(list->prev, struct fsnotify_event, list);
@@ -114,7 +115,7 @@ int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, u32 mask,
mask &= ~IN_ISDIR;
fsn_event = &event->fse;
- fsnotify_init_event(fsn_event, 0);
+ fsnotify_init_event(fsn_event);
event->mask = mask;
event->wd = wd;
event->sync_cookie = cookie;
@@ -128,7 +129,7 @@ int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, u32 mask,
fsnotify_destroy_event(group, fsn_event);
}
- if (inode_mark->mask & IN_ONESHOT)
+ if (inode_mark->flags & FSNOTIFY_MARK_FLAG_IN_ONESHOT)
fsnotify_destroy_mark(inode_mark, group);
return 0;
@@ -183,7 +184,8 @@ static void inotify_free_group_priv(struct fsnotify_group *group)
dec_inotify_instances(group->inotify_data.ucounts);
}
-static void inotify_free_event(struct fsnotify_event *fsn_event)
+static void inotify_free_event(struct fsnotify_group *group,
+ struct fsnotify_event *fsn_event)
{
kfree(INOTIFY_E(fsn_event));
}
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 32b6b97021be..7360d16ce46d 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -37,6 +37,15 @@
#include <asm/ioctls.h>
+/*
+ * An inotify watch requires allocating an inotify_inode_mark structure as
+ * well as pinning the watched inode. Doubling the size of a VFS inode
+ * should be more than enough to cover the additional filesystem inode
+ * size increase.
+ */
+#define INOTIFY_WATCH_COST (sizeof(struct inotify_inode_mark) + \
+ 2 * sizeof(struct inode))
+
/* configurable via /proc/sys/fs/inotify/ */
static int inotify_max_queued_events __read_mostly;
@@ -80,10 +89,10 @@ static inline __u32 inotify_arg_to_mask(struct inode *inode, u32 arg)
__u32 mask;
/*
- * Everything should accept their own ignored and should receive events
- * when the inode is unmounted. All directories care about children.
+ * Everything should receive events when the inode is unmounted.
+ * All directories care about children.
*/
- mask = (FS_IN_IGNORED | FS_UNMOUNT);
+ mask = (FS_UNMOUNT);
if (S_ISDIR(inode->i_mode))
mask |= FS_EVENT_ON_CHILD;
@@ -93,13 +102,28 @@ static inline __u32 inotify_arg_to_mask(struct inode *inode, u32 arg)
return mask;
}
+#define INOTIFY_MARK_FLAGS \
+ (FSNOTIFY_MARK_FLAG_EXCL_UNLINK | FSNOTIFY_MARK_FLAG_IN_ONESHOT)
+
+static inline unsigned int inotify_arg_to_flags(u32 arg)
+{
+ unsigned int flags = 0;
+
+ if (arg & IN_EXCL_UNLINK)
+ flags |= FSNOTIFY_MARK_FLAG_EXCL_UNLINK;
+ if (arg & IN_ONESHOT)
+ flags |= FSNOTIFY_MARK_FLAG_IN_ONESHOT;
+
+ return flags;
+}
+
static inline u32 inotify_mask_to_arg(__u32 mask)
{
return mask & (IN_ALL_EVENTS | IN_ISDIR | IN_UNMOUNT | IN_IGNORED |
IN_Q_OVERFLOW);
}
-/* intofiy userspace file descriptor functions */
+/* inotify userspace file descriptor functions */
static __poll_t inotify_poll(struct file *file, poll_table *wait)
{
struct fsnotify_group *group = file->private_data;
@@ -137,10 +161,9 @@ static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
size_t event_size = sizeof(struct inotify_event);
struct fsnotify_event *event;
- if (fsnotify_notify_queue_is_empty(group))
- return NULL;
-
event = fsnotify_peek_first_event(group);
+ if (!event)
+ return NULL;
pr_debug("%s: group=%p event=%p\n", __func__, group, event);
@@ -343,7 +366,7 @@ static int inotify_find_inode(const char __user *dirname, struct path *path,
if (error)
return error;
/* you can only watch an inode if you have read permissions on it */
- error = inode_permission(path->dentry->d_inode, MAY_READ);
+ error = path_permission(path, MAY_READ);
if (error) {
path_put(path);
return error;
@@ -505,13 +528,10 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
struct fsnotify_mark *fsn_mark;
struct inotify_inode_mark *i_mark;
__u32 old_mask, new_mask;
- __u32 mask;
- int add = (arg & IN_MASK_ADD);
+ int replace = !(arg & IN_MASK_ADD);
int create = (arg & IN_MASK_CREATE);
int ret;
- mask = inotify_arg_to_mask(inode, arg);
-
fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, group);
if (!fsn_mark)
return -ENOENT;
@@ -524,10 +544,12 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
spin_lock(&fsn_mark->lock);
old_mask = fsn_mark->mask;
- if (add)
- fsn_mark->mask |= mask;
- else
- fsn_mark->mask = mask;
+ if (replace) {
+ fsn_mark->mask = 0;
+ fsn_mark->flags &= ~INOTIFY_MARK_FLAGS;
+ }
+ fsn_mark->mask |= inotify_arg_to_mask(inode, arg);
+ fsn_mark->flags |= inotify_arg_to_flags(arg);
new_mask = fsn_mark->mask;
spin_unlock(&fsn_mark->lock);
@@ -558,19 +580,17 @@ static int inotify_new_watch(struct fsnotify_group *group,
u32 arg)
{
struct inotify_inode_mark *tmp_i_mark;
- __u32 mask;
int ret;
struct idr *idr = &group->inotify_data.idr;
spinlock_t *idr_lock = &group->inotify_data.idr_lock;
- mask = inotify_arg_to_mask(inode, arg);
-
tmp_i_mark = kmem_cache_alloc(inotify_inode_mark_cachep, GFP_KERNEL);
if (unlikely(!tmp_i_mark))
return -ENOMEM;
fsnotify_init_mark(&tmp_i_mark->fsn_mark, group);
- tmp_i_mark->fsn_mark.mask = mask;
+ tmp_i_mark->fsn_mark.mask = inotify_arg_to_mask(inode, arg);
+ tmp_i_mark->fsn_mark.flags = inotify_arg_to_flags(arg);
tmp_i_mark->wd = -1;
ret = inotify_add_to_idr(idr, idr_lock, tmp_i_mark);
@@ -607,13 +627,13 @@ static int inotify_update_watch(struct fsnotify_group *group, struct inode *inod
{
int ret = 0;
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
/* try to update and existing watch with the new arg */
ret = inotify_update_existing_watch(group, inode, arg);
/* no mark present, try to add a new one */
if (ret == -ENOENT)
ret = inotify_new_watch(group, inode, arg);
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
return ret;
}
@@ -623,17 +643,18 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events)
struct fsnotify_group *group;
struct inotify_event_info *oevent;
- group = fsnotify_alloc_group(&inotify_fsnotify_ops);
+ group = fsnotify_alloc_group(&inotify_fsnotify_ops,
+ FSNOTIFY_GROUP_USER);
if (IS_ERR(group))
return group;
- oevent = kmalloc(sizeof(struct inotify_event_info), GFP_KERNEL);
+ oevent = kmalloc(sizeof(struct inotify_event_info), GFP_KERNEL_ACCOUNT);
if (unlikely(!oevent)) {
fsnotify_destroy_group(group);
return ERR_PTR(-ENOMEM);
}
group->overflow_event = &oevent->fse;
- fsnotify_init_event(group->overflow_event, 0);
+ fsnotify_init_event(group->overflow_event);
oevent->mask = FS_Q_OVERFLOW;
oevent->wd = -1;
oevent->sync_cookie = 0;
@@ -797,6 +818,18 @@ SYSCALL_DEFINE2(inotify_rm_watch, int, fd, __s32, wd)
*/
static int __init inotify_user_setup(void)
{
+ unsigned long watches_max;
+ struct sysinfo si;
+
+ si_meminfo(&si);
+ /*
+ * Allow up to 1% of addressable memory to be allocated for inotify
+ * watches (per user) limited to the range [8192, 1048576].
+ */
+ watches_max = (((si.totalram - si.totalhigh) / 100) << PAGE_SHIFT) /
+ INOTIFY_WATCH_COST;
+ watches_max = clamp(watches_max, 8192UL, 1048576UL);
+
BUILD_BUG_ON(IN_ACCESS != FS_ACCESS);
BUILD_BUG_ON(IN_MODIFY != FS_MODIFY);
BUILD_BUG_ON(IN_ATTRIB != FS_ATTRIB);
@@ -812,9 +845,7 @@ static int __init inotify_user_setup(void)
BUILD_BUG_ON(IN_UNMOUNT != FS_UNMOUNT);
BUILD_BUG_ON(IN_Q_OVERFLOW != FS_Q_OVERFLOW);
BUILD_BUG_ON(IN_IGNORED != FS_IN_IGNORED);
- BUILD_BUG_ON(IN_EXCL_UNLINK != FS_EXCL_UNLINK);
BUILD_BUG_ON(IN_ISDIR != FS_ISDIR);
- BUILD_BUG_ON(IN_ONESHOT != FS_IN_ONESHOT);
BUILD_BUG_ON(HWEIGHT32(ALL_INOTIFY_BITS) != 22);
@@ -823,7 +854,7 @@ static int __init inotify_user_setup(void)
inotify_max_queued_events = 16384;
init_user_ns.ucount_max[UCOUNT_INOTIFY_INSTANCES] = 128;
- init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES] = 8192;
+ init_user_ns.ucount_max[UCOUNT_INOTIFY_WATCHES] = watches_max;
return 0;
}
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 5b44be5f93dd..c74ef947447d 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -116,20 +116,64 @@ __u32 fsnotify_conn_mask(struct fsnotify_mark_connector *conn)
return *fsnotify_conn_mask_p(conn);
}
-static void __fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
+static void fsnotify_get_inode_ref(struct inode *inode)
+{
+ ihold(inode);
+ atomic_long_inc(&inode->i_sb->s_fsnotify_connectors);
+}
+
+/*
+ * Grab or drop inode reference for the connector if needed.
+ *
+ * When it's time to drop the reference, we only clear the HAS_IREF flag and
+ * return the inode object. fsnotify_drop_object() will be resonsible for doing
+ * iput() outside of spinlocks. This happens when last mark that wanted iref is
+ * detached.
+ */
+static struct inode *fsnotify_update_iref(struct fsnotify_mark_connector *conn,
+ bool want_iref)
+{
+ bool has_iref = conn->flags & FSNOTIFY_CONN_FLAG_HAS_IREF;
+ struct inode *inode = NULL;
+
+ if (conn->type != FSNOTIFY_OBJ_TYPE_INODE ||
+ want_iref == has_iref)
+ return NULL;
+
+ if (want_iref) {
+ /* Pin inode if any mark wants inode refcount held */
+ fsnotify_get_inode_ref(fsnotify_conn_inode(conn));
+ conn->flags |= FSNOTIFY_CONN_FLAG_HAS_IREF;
+ } else {
+ /* Unpin inode after detach of last mark that wanted iref */
+ inode = fsnotify_conn_inode(conn);
+ conn->flags &= ~FSNOTIFY_CONN_FLAG_HAS_IREF;
+ }
+
+ return inode;
+}
+
+static void *__fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
{
u32 new_mask = 0;
+ bool want_iref = false;
struct fsnotify_mark *mark;
assert_spin_locked(&conn->lock);
/* We can get detached connector here when inode is getting unlinked. */
if (!fsnotify_valid_obj_type(conn->type))
- return;
+ return NULL;
hlist_for_each_entry(mark, &conn->list, obj_list) {
- if (mark->flags & FSNOTIFY_MARK_FLAG_ATTACHED)
- new_mask |= mark->mask;
+ if (!(mark->flags & FSNOTIFY_MARK_FLAG_ATTACHED))
+ continue;
+ new_mask |= fsnotify_calc_mask(mark);
+ if (conn->type == FSNOTIFY_OBJ_TYPE_INODE &&
+ !(mark->flags & FSNOTIFY_MARK_FLAG_NO_IREF))
+ want_iref = true;
}
*fsnotify_conn_mask_p(conn) = new_mask;
+
+ return fsnotify_update_iref(conn, want_iref);
}
/*
@@ -169,6 +213,31 @@ static void fsnotify_connector_destroy_workfn(struct work_struct *work)
}
}
+static void fsnotify_put_inode_ref(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+
+ iput(inode);
+ if (atomic_long_dec_and_test(&sb->s_fsnotify_connectors))
+ wake_up_var(&sb->s_fsnotify_connectors);
+}
+
+static void fsnotify_get_sb_connectors(struct fsnotify_mark_connector *conn)
+{
+ struct super_block *sb = fsnotify_connector_sb(conn);
+
+ if (sb)
+ atomic_long_inc(&sb->s_fsnotify_connectors);
+}
+
+static void fsnotify_put_sb_connectors(struct fsnotify_mark_connector *conn)
+{
+ struct super_block *sb = fsnotify_connector_sb(conn);
+
+ if (sb && atomic_long_dec_and_test(&sb->s_fsnotify_connectors))
+ wake_up_var(&sb->s_fsnotify_connectors);
+}
+
static void *fsnotify_detach_connector_from_object(
struct fsnotify_mark_connector *conn,
unsigned int *type)
@@ -182,13 +251,17 @@ static void *fsnotify_detach_connector_from_object(
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE) {
inode = fsnotify_conn_inode(conn);
inode->i_fsnotify_mask = 0;
- atomic_long_inc(&inode->i_sb->s_fsnotify_inode_refs);
+
+ /* Unpin inode when detaching from connector */
+ if (!(conn->flags & FSNOTIFY_CONN_FLAG_HAS_IREF))
+ inode = NULL;
} else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT) {
fsnotify_conn_mount(conn)->mnt_fsnotify_mask = 0;
} else if (conn->type == FSNOTIFY_OBJ_TYPE_SB) {
fsnotify_conn_sb(conn)->s_fsnotify_mask = 0;
}
+ fsnotify_put_sb_connectors(conn);
rcu_assign_pointer(*(conn->obj), NULL);
conn->obj = NULL;
conn->type = FSNOTIFY_OBJ_TYPE_DETACHED;
@@ -209,19 +282,12 @@ static void fsnotify_final_mark_destroy(struct fsnotify_mark *mark)
/* Drop object reference originally held by a connector */
static void fsnotify_drop_object(unsigned int type, void *objp)
{
- struct inode *inode;
- struct super_block *sb;
-
if (!objp)
return;
/* Currently only inode references are passed to be dropped */
if (WARN_ON_ONCE(type != FSNOTIFY_OBJ_TYPE_INODE))
return;
- inode = objp;
- sb = inode->i_sb;
- iput(inode);
- if (atomic_long_dec_and_test(&sb->s_fsnotify_inode_refs))
- wake_up_var(&sb->s_fsnotify_inode_refs);
+ fsnotify_put_inode_ref(objp);
}
void fsnotify_put_mark(struct fsnotify_mark *mark)
@@ -250,7 +316,8 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
objp = fsnotify_detach_connector_from_object(conn, &type);
free_conn = true;
} else {
- __fsnotify_recalc_mask(conn);
+ objp = __fsnotify_recalc_mask(conn);
+ type = conn->type;
}
WRITE_ONCE(mark->connector, NULL);
spin_unlock(&conn->lock);
@@ -329,7 +396,7 @@ bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info)
{
int type;
- fsnotify_foreach_obj_type(type) {
+ fsnotify_foreach_iter_type(type) {
/* This can fail if mark is being removed */
if (!fsnotify_get_mark_safe(iter_info->marks[type])) {
__release(&fsnotify_mark_srcu);
@@ -358,7 +425,7 @@ void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info)
int type;
iter_info->srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
- fsnotify_foreach_obj_type(type)
+ fsnotify_foreach_iter_type(type)
fsnotify_put_mark_wake(iter_info->marks[type]);
}
@@ -374,9 +441,7 @@ void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info)
*/
void fsnotify_detach_mark(struct fsnotify_mark *mark)
{
- struct fsnotify_group *group = mark->group;
-
- WARN_ON_ONCE(!mutex_is_locked(&group->mark_mutex));
+ fsnotify_group_assert_locked(mark->group);
WARN_ON_ONCE(!srcu_read_lock_held(&fsnotify_mark_srcu) &&
refcount_read(&mark->refcnt) < 1 +
!!(mark->flags & FSNOTIFY_MARK_FLAG_ATTACHED));
@@ -391,8 +456,6 @@ void fsnotify_detach_mark(struct fsnotify_mark *mark)
list_del_init(&mark->g_list);
spin_unlock(&mark->lock);
- atomic_dec(&group->num_marks);
-
/* Drop mark reference acquired in fsnotify_add_mark_locked() */
fsnotify_put_mark(mark);
}
@@ -430,9 +493,9 @@ void fsnotify_free_mark(struct fsnotify_mark *mark)
void fsnotify_destroy_mark(struct fsnotify_mark *mark,
struct fsnotify_group *group)
{
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
fsnotify_detach_mark(mark);
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
fsnotify_free_mark(mark);
}
EXPORT_SYMBOL_GPL(fsnotify_destroy_mark);
@@ -474,10 +537,9 @@ int fsnotify_compare_groups(struct fsnotify_group *a, struct fsnotify_group *b)
}
static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
- unsigned int type,
+ unsigned int obj_type,
__kernel_fsid_t *fsid)
{
- struct inode *inode = NULL;
struct fsnotify_mark_connector *conn;
conn = kmem_cache_alloc(fsnotify_mark_connector_cachep, GFP_KERNEL);
@@ -485,7 +547,8 @@ static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
return -ENOMEM;
spin_lock_init(&conn->lock);
INIT_HLIST_HEAD(&conn->list);
- conn->type = type;
+ conn->flags = 0;
+ conn->type = obj_type;
conn->obj = connp;
/* Cache fsid of filesystem containing the object */
if (fsid) {
@@ -495,16 +558,15 @@ static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
conn->fsid.val[0] = conn->fsid.val[1] = 0;
conn->flags = 0;
}
- if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
- inode = igrab(fsnotify_conn_inode(conn));
+ fsnotify_get_sb_connectors(conn);
+
/*
* cmpxchg() provides the barrier so that readers of *connp can see
* only initialized structure
*/
if (cmpxchg(connp, NULL, conn)) {
/* Someone else created list structure for us */
- if (inode)
- iput(inode);
+ fsnotify_put_sb_connectors(conn);
kmem_cache_free(fsnotify_mark_connector_cachep, conn);
}
@@ -545,15 +607,16 @@ static struct fsnotify_mark_connector *fsnotify_grab_connector(
* priority, highest number first, and then by the group's location in memory.
*/
static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
- fsnotify_connp_t *connp, unsigned int type,
- int allow_dups, __kernel_fsid_t *fsid)
+ fsnotify_connp_t *connp,
+ unsigned int obj_type,
+ int add_flags, __kernel_fsid_t *fsid)
{
struct fsnotify_mark *lmark, *last = NULL;
struct fsnotify_mark_connector *conn;
int cmp;
int err = 0;
- if (WARN_ON(!fsnotify_valid_obj_type(type)))
+ if (WARN_ON(!fsnotify_valid_obj_type(obj_type)))
return -EINVAL;
/* Backend is expected to check for zero fsid (e.g. tmpfs) */
@@ -565,7 +628,8 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
conn = fsnotify_grab_connector(connp);
if (!conn) {
spin_unlock(&mark->lock);
- err = fsnotify_attach_connector_to_object(connp, type, fsid);
+ err = fsnotify_attach_connector_to_object(connp, obj_type,
+ fsid);
if (err)
return err;
goto restart;
@@ -604,7 +668,7 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
if ((lmark->group == mark->group) &&
(lmark->flags & FSNOTIFY_MARK_FLAG_ATTACHED) &&
- !allow_dups) {
+ !(mark->group->flags & FSNOTIFY_GROUP_DUPS)) {
err = -EEXIST;
goto out_err;
}
@@ -638,13 +702,13 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
* event types should be delivered to which group.
*/
int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
- fsnotify_connp_t *connp, unsigned int type,
- int allow_dups, __kernel_fsid_t *fsid)
+ fsnotify_connp_t *connp, unsigned int obj_type,
+ int add_flags, __kernel_fsid_t *fsid)
{
struct fsnotify_group *group = mark->group;
int ret = 0;
- BUG_ON(!mutex_is_locked(&group->mark_mutex));
+ fsnotify_group_assert_locked(group);
/*
* LOCKING ORDER!!!!
@@ -656,16 +720,14 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
mark->flags |= FSNOTIFY_MARK_FLAG_ALIVE | FSNOTIFY_MARK_FLAG_ATTACHED;
list_add(&mark->g_list, &group->marks_list);
- atomic_inc(&group->num_marks);
fsnotify_get_mark(mark); /* for g_list */
spin_unlock(&mark->lock);
- ret = fsnotify_add_mark_list(mark, connp, type, allow_dups, fsid);
+ ret = fsnotify_add_mark_list(mark, connp, obj_type, add_flags, fsid);
if (ret)
goto err;
- if (mark->mask)
- fsnotify_recalc_mask(mark->connector);
+ fsnotify_recalc_mask(mark->connector);
return ret;
err:
@@ -674,21 +736,21 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
FSNOTIFY_MARK_FLAG_ATTACHED);
list_del_init(&mark->g_list);
spin_unlock(&mark->lock);
- atomic_dec(&group->num_marks);
fsnotify_put_mark(mark);
return ret;
}
int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
- unsigned int type, int allow_dups, __kernel_fsid_t *fsid)
+ unsigned int obj_type, int add_flags,
+ __kernel_fsid_t *fsid)
{
int ret;
struct fsnotify_group *group = mark->group;
- mutex_lock(&group->mark_mutex);
- ret = fsnotify_add_mark_locked(mark, connp, type, allow_dups, fsid);
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_lock(group);
+ ret = fsnotify_add_mark_locked(mark, connp, obj_type, add_flags, fsid);
+ fsnotify_group_unlock(group);
return ret;
}
EXPORT_SYMBOL_GPL(fsnotify_add_mark);
@@ -722,14 +784,14 @@ EXPORT_SYMBOL_GPL(fsnotify_find_mark);
/* Clear any marks in a group with given type mask */
void fsnotify_clear_marks_by_group(struct fsnotify_group *group,
- unsigned int type_mask)
+ unsigned int obj_type)
{
struct fsnotify_mark *lmark, *mark;
LIST_HEAD(to_free);
struct list_head *head = &to_free;
/* Skip selection step if we want to clear all marks. */
- if (type_mask == FSNOTIFY_OBJ_ALL_TYPES_MASK) {
+ if (obj_type == FSNOTIFY_OBJ_TYPE_ANY) {
head = &group->marks_list;
goto clear;
}
@@ -742,24 +804,24 @@ void fsnotify_clear_marks_by_group(struct fsnotify_group *group,
* move marks to free to to_free list in one go and then free marks in
* to_free list one by one.
*/
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) {
- if ((1U << mark->connector->type) & type_mask)
+ if (mark->connector->type == obj_type)
list_move(&mark->g_list, &to_free);
}
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
clear:
while (1) {
- mutex_lock(&group->mark_mutex);
+ fsnotify_group_lock(group);
if (list_empty(head)) {
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
break;
}
mark = list_first_entry(head, struct fsnotify_mark, g_list);
fsnotify_get_mark(mark);
fsnotify_detach_mark(mark);
- mutex_unlock(&group->mark_mutex);
+ fsnotify_group_unlock(group);
fsnotify_free_mark(mark);
fsnotify_put_mark(mark);
}
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 75d79d6d3ef0..9022ae650cf8 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -47,13 +47,6 @@ u32 fsnotify_get_cookie(void)
}
EXPORT_SYMBOL_GPL(fsnotify_get_cookie);
-/* return true if the notify queue is empty, false otherwise */
-bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group)
-{
- assert_spin_locked(&group->notification_lock);
- return list_empty(&group->notification_list) ? true : false;
-}
-
void fsnotify_destroy_event(struct fsnotify_group *group,
struct fsnotify_event *event)
{
@@ -71,20 +64,26 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
WARN_ON(!list_empty(&event->list));
spin_unlock(&group->notification_lock);
}
- group->ops->free_event(event);
+ group->ops->free_event(group, event);
}
/*
- * Add an event to the group notification queue. The group can later pull this
- * event off the queue to deal with. The function returns 0 if the event was
- * added to the queue, 1 if the event was merged with some other queued event,
+ * Try to add an event to the notification queue.
+ * The group can later pull this event off the queue to deal with.
+ * The group can use the @merge hook to merge the event with a queued event.
+ * The group can use the @insert hook to insert the event into hash table.
+ * The function returns:
+ * 0 if the event was added to a queue
+ * 1 if the event was merged with some other queued event
* 2 if the event was not queued - either the queue of events has overflown
- * or the group is shutting down.
+ * or the group is shutting down.
*/
-int fsnotify_add_event(struct fsnotify_group *group,
- struct fsnotify_event *event,
- int (*merge)(struct list_head *,
- struct fsnotify_event *))
+int fsnotify_insert_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ int (*merge)(struct fsnotify_group *,
+ struct fsnotify_event *),
+ void (*insert)(struct fsnotify_group *,
+ struct fsnotify_event *))
{
int ret = 0;
struct list_head *list = &group->notification_list;
@@ -111,7 +110,7 @@ int fsnotify_add_event(struct fsnotify_group *group,
}
if (!list_empty(list) && merge) {
- ret = merge(list, event);
+ ret = merge(group, event);
if (ret) {
spin_unlock(&group->notification_lock);
return ret;
@@ -121,6 +120,8 @@ int fsnotify_add_event(struct fsnotify_group *group,
queue:
group->q_len++;
list_add_tail(&event->list, list);
+ if (insert)
+ insert(group, event);
spin_unlock(&group->notification_lock);
wake_up(&group->notification_waitq);
@@ -141,33 +142,36 @@ void fsnotify_remove_queued_event(struct fsnotify_group *group,
}
/*
- * Remove and return the first event from the notification list. It is the
- * responsibility of the caller to destroy the obtained event
+ * Return the first event on the notification list without removing it.
+ * Returns NULL if the list is empty.
*/
-struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group)
+struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group)
{
- struct fsnotify_event *event;
-
assert_spin_locked(&group->notification_lock);
- pr_debug("%s: group=%p\n", __func__, group);
+ if (fsnotify_notify_queue_is_empty(group))
+ return NULL;
- event = list_first_entry(&group->notification_list,
- struct fsnotify_event, list);
- fsnotify_remove_queued_event(group, event);
- return event;
+ return list_first_entry(&group->notification_list,
+ struct fsnotify_event, list);
}
/*
- * This will not remove the event, that must be done with
- * fsnotify_remove_first_event()
+ * Remove and return the first event from the notification list. It is the
+ * responsibility of the caller to destroy the obtained event
*/
-struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group)
+struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group)
{
- assert_spin_locked(&group->notification_lock);
+ struct fsnotify_event *event = fsnotify_peek_first_event(group);
- return list_first_entry(&group->notification_list,
- struct fsnotify_event, list);
+ if (!event)
+ return NULL;
+
+ pr_debug("%s: group=%p event=%p\n", __func__, group, event);
+
+ fsnotify_remove_queued_event(group, event);
+
+ return event;
}
/*
diff --git a/fs/open.c b/fs/open.c
index 83f62cf1432c..d69312a2d434 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -492,7 +492,7 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename)
if (error)
goto out;
- error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
+ error = path_permission(&path, MAY_EXEC | MAY_CHDIR);
if (error)
goto dput_and_out;
@@ -521,7 +521,7 @@ SYSCALL_DEFINE1(fchdir, unsigned int, fd)
if (!d_can_lookup(f.file->f_path.dentry))
goto out_putf;
- error = inode_permission(file_inode(f.file), MAY_EXEC | MAY_CHDIR);
+ error = file_permission(f.file, MAY_EXEC | MAY_CHDIR);
if (!error)
set_fs_pwd(current->fs, &f.file->f_path);
out_putf:
@@ -540,7 +540,7 @@ SYSCALL_DEFINE1(chroot, const char __user *, filename)
if (error)
goto out;
- error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
+ error = path_permission(&path, MAY_EXEC | MAY_CHDIR);
if (error)
goto dput_and_out;
@@ -954,6 +954,47 @@ struct file *dentry_open(const struct path *path, int flags,
}
EXPORT_SYMBOL(dentry_open);
+/**
+ * dentry_create - Create and open a file
+ * @path: path to create
+ * @flags: O_ flags
+ * @mode: mode bits for new file
+ * @cred: credentials to use
+ *
+ * Caller must hold the parent directory's lock, and have prepared
+ * a negative dentry, placed in @path->dentry, for the new file.
+ *
+ * Caller sets @path->mnt to the vfsmount of the filesystem where
+ * the new file is to be created. The parent directory and the
+ * negative dentry must reside on the same filesystem instance.
+ *
+ * On success, returns a "struct file *". Otherwise a ERR_PTR
+ * is returned.
+ */
+struct file *dentry_create(const struct path *path, int flags, umode_t mode,
+ const struct cred *cred)
+{
+ struct file *f;
+ int error;
+
+ validate_creds(cred);
+ f = alloc_empty_file(flags, cred);
+ if (IS_ERR(f))
+ return f;
+
+ error = vfs_create(d_inode(path->dentry->d_parent),
+ path->dentry, mode, true);
+ if (!error)
+ error = vfs_open(path, f);
+
+ if (unlikely(error)) {
+ fput(f);
+ return ERR_PTR(error);
+ }
+ return f;
+}
+EXPORT_SYMBOL(dentry_create);
+
struct file *open_with_fake_path(const struct path *path, int flags,
struct inode *inode, const struct cred *cred)
{
@@ -1310,7 +1351,7 @@ EXPORT_SYMBOL(filp_close);
*/
SYSCALL_DEFINE1(close, unsigned int, fd)
{
- int retval = __close_fd(current->files, fd);
+ int retval = close_fd(fd);
/* can't restart close syscall because file table entry was cleared */
if (unlikely(retval == -ERESTARTSYS ||
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 26f91868fbda..87b7a4a74f4e 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -212,9 +212,16 @@ static inline int ovl_do_rename(struct inode *olddir, struct dentry *olddentry,
unsigned int flags)
{
int err;
+ struct renamedata rd = {
+ .old_dir = olddir,
+ .old_dentry = olddentry,
+ .new_dir = newdir,
+ .new_dentry = newdentry,
+ .flags = flags,
+ };
pr_debug("rename(%pd2, %pd2, 0x%x)\n", olddentry, newdentry, flags);
- err = vfs_rename(olddir, olddentry, newdir, newdentry, NULL, flags);
+ err = vfs_rename(&rd);
if (err) {
pr_debug("...rename(%pd2, %pd2, ...) = %i\n",
olddentry, newdentry, err);
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 81882a13212d..cb51763ed554 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -28,14 +28,13 @@ static int seq_show(struct seq_file *m, void *v)
if (!task)
return -ENOENT;
- files = get_files_struct(task);
- put_task_struct(task);
-
+ task_lock(task);
+ files = task->files;
if (files) {
unsigned int fd = proc_fd(m->private);
spin_lock(&files->file_lock);
- file = fcheck_files(files, fd);
+ file = files_lookup_fd_locked(files, fd);
if (file) {
struct fdtable *fdt = files_fdtable(files);
@@ -47,8 +46,9 @@ static int seq_show(struct seq_file *m, void *v)
ret = 0;
}
spin_unlock(&files->file_lock);
- put_files_struct(files);
}
+ task_unlock(task);
+ put_task_struct(task);
if (ret)
return ret;
@@ -57,6 +57,7 @@ static int seq_show(struct seq_file *m, void *v)
(long long)file->f_pos, f_flags,
real_mount(file->f_path.mnt)->mnt_id);
+ /* show_fd_locks() never deferences files so a stale value is safe */
show_fd_locks(m, file, files);
if (seq_has_overflowed(m))
goto out;
@@ -83,18 +84,13 @@ static const struct file_operations proc_fdinfo_file_operations = {
static bool tid_fd_mode(struct task_struct *task, unsigned fd, fmode_t *mode)
{
- struct files_struct *files = get_files_struct(task);
struct file *file;
- if (!files)
- return false;
-
rcu_read_lock();
- file = fcheck_files(files, fd);
+ file = task_lookup_fd_rcu(task, fd);
if (file)
*mode = file->f_mode;
rcu_read_unlock();
- put_files_struct(files);
return !!file;
}
@@ -146,29 +142,22 @@ static const struct dentry_operations tid_fd_dentry_operations = {
static int proc_fd_link(struct dentry *dentry, struct path *path)
{
- struct files_struct *files = NULL;
struct task_struct *task;
int ret = -ENOENT;
task = get_proc_task(d_inode(dentry));
if (task) {
- files = get_files_struct(task);
- put_task_struct(task);
- }
-
- if (files) {
unsigned int fd = proc_fd(d_inode(dentry));
struct file *fd_file;
- spin_lock(&files->file_lock);
- fd_file = fcheck_files(files, fd);
+ fd_file = fget_task(task, fd);
if (fd_file) {
*path = fd_file->f_path;
path_get(&fd_file->f_path);
ret = 0;
+ fput(fd_file);
}
- spin_unlock(&files->file_lock);
- put_files_struct(files);
+ put_task_struct(task);
}
return ret;
@@ -229,7 +218,6 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
instantiate_t instantiate)
{
struct task_struct *p = get_proc_task(file_inode(file));
- struct files_struct *files;
unsigned int fd;
if (!p)
@@ -237,22 +225,18 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
if (!dir_emit_dots(file, ctx))
goto out;
- files = get_files_struct(p);
- if (!files)
- goto out;
rcu_read_lock();
- for (fd = ctx->pos - 2;
- fd < files_fdtable(files)->max_fds;
- fd++, ctx->pos++) {
+ for (fd = ctx->pos - 2;; fd++) {
struct file *f;
struct fd_data data;
char name[10 + 1];
unsigned int len;
- f = fcheck_files(files, fd);
+ f = task_lookup_next_fd_rcu(p, &fd);
+ ctx->pos = fd + 2LL;
if (!f)
- continue;
+ break;
data.mode = f->f_mode;
rcu_read_unlock();
data.fd = fd;
@@ -261,13 +245,11 @@ static int proc_readfd_common(struct file *file, struct dir_context *ctx,
if (!proc_fill_cache(file, ctx,
name, len, instantiate, p,
&data))
- goto out_fd_loop;
+ goto out;
cond_resched();
rcu_read_lock();
}
rcu_read_unlock();
-out_fd_loop:
- put_files_struct(files);
out:
put_task_struct(p);
return 0;
diff --git a/fs/udf/file.c b/fs/udf/file.c
index e283a62701b8..25f7c915f22b 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -181,7 +181,7 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
long old_block, new_block;
int result;
- if (inode_permission(inode, MAY_READ) != 0) {
+ if (file_permission(filp, MAY_READ) != 0) {
udf_debug("no permission to access inode %lu\n", inode->i_ino);
return -EPERM;
}
diff --git a/fs/verity/enable.c b/fs/verity/enable.c
index 5ceae66e1ae0..29becb66d0d8 100644
--- a/fs/verity/enable.c
+++ b/fs/verity/enable.c
@@ -369,7 +369,7 @@ int fsverity_ioctl_enable(struct file *filp, const void __user *uarg)
* has verity enabled, and to stabilize the data being hashed.
*/
- err = inode_permission(inode, MAY_WRITE);
+ err = file_permission(filp, MAY_WRITE);
if (err)
return err;
diff --git a/include/linux/dnotify.h b/include/linux/dnotify.h
index 0aad774beaec..b87c3b85a166 100644
--- a/include/linux/dnotify.h
+++ b/include/linux/dnotify.h
@@ -26,7 +26,7 @@ struct dnotify_struct {
FS_MODIFY | FS_MODIFY_CHILD |\
FS_ACCESS | FS_ACCESS_CHILD |\
FS_ATTRIB | FS_ATTRIB_CHILD |\
- FS_CREATE | FS_DN_RENAME |\
+ FS_CREATE | FS_RENAME |\
FS_MOVED_FROM | FS_MOVED_TO)
extern int dir_notify_enable;
diff --git a/include/linux/errno.h b/include/linux/errno.h
index d73f597a2484..8b0c754bab02 100644
--- a/include/linux/errno.h
+++ b/include/linux/errno.h
@@ -31,5 +31,6 @@
#define EJUKEBOX 528 /* Request initiated, but will not complete before timeout */
#define EIOCBQUEUED 529 /* iocb queued, will get completion event */
#define ERECALLCONFLICT 530 /* conflict with recalled state */
+#define ENOGRACE 531 /* NFS file lock reclaim refused */
#endif
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index 3ceb72b67a7a..218fc5c54e90 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -213,12 +213,27 @@ struct export_operations {
bool write, u32 *device_generation);
int (*commit_blocks)(struct inode *inode, struct iomap *iomaps,
int nr_iomaps, struct iattr *iattr);
+ u64 (*fetch_iversion)(struct inode *);
+#define EXPORT_OP_NOWCC (0x1) /* don't collect v3 wcc data */
+#define EXPORT_OP_NOSUBTREECHK (0x2) /* no subtree checking */
+#define EXPORT_OP_CLOSE_BEFORE_UNLINK (0x4) /* close files before unlink */
+#define EXPORT_OP_REMOTE_FS (0x8) /* Filesystem is remote */
+#define EXPORT_OP_NOATOMIC_ATTR (0x10) /* Filesystem cannot supply
+ atomic attribute updates
+ */
+#define EXPORT_OP_FLUSH_ON_CLOSE (0x20) /* fs flushes file data on close */
+ unsigned long flags;
};
extern int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid,
int *max_len, struct inode *parent);
extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid,
int *max_len, int connectable);
+extern struct dentry *exportfs_decode_fh_raw(struct vfsmount *mnt,
+ struct fid *fid, int fh_len,
+ int fileid_type,
+ int (*acceptable)(void *, struct dentry *),
+ void *context);
extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid *fid,
int fh_len, int fileid_type, int (*acceptable)(void *, struct dentry *),
void *context);
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index 3e9c56ee651f..558844c8d259 100644
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -2,8 +2,11 @@
#ifndef _LINUX_FANOTIFY_H
#define _LINUX_FANOTIFY_H
+#include <linux/sysctl.h>
#include <uapi/linux/fanotify.h>
+extern struct ctl_table fanotify_table[]; /* for sysctl */
+
#define FAN_GROUP_FLAG(group, flag) \
((group)->fanotify_data.flags & (flag))
@@ -15,27 +18,62 @@
* these constant, the programs may break if re-compiled with new uapi headers
* and then run on an old kernel.
*/
-#define FANOTIFY_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
+
+/* Group classes where permission events are allowed */
+#define FANOTIFY_PERM_CLASSES (FAN_CLASS_CONTENT | \
FAN_CLASS_PRE_CONTENT)
-#define FANOTIFY_FID_BITS (FAN_REPORT_FID | FAN_REPORT_DFID_NAME)
+#define FANOTIFY_CLASS_BITS (FAN_CLASS_NOTIF | FANOTIFY_PERM_CLASSES)
+
+#define FANOTIFY_FID_BITS (FAN_REPORT_DFID_NAME_TARGET)
+
+#define FANOTIFY_INFO_MODES (FANOTIFY_FID_BITS | FAN_REPORT_PIDFD)
+
+/*
+ * fanotify_init() flags that require CAP_SYS_ADMIN.
+ * We do not allow unprivileged groups to request permission events.
+ * We do not allow unprivileged groups to get other process pid in events.
+ * We do not allow unprivileged groups to use unlimited resources.
+ */
+#define FANOTIFY_ADMIN_INIT_FLAGS (FANOTIFY_PERM_CLASSES | \
+ FAN_REPORT_TID | \
+ FAN_REPORT_PIDFD | \
+ FAN_UNLIMITED_QUEUE | \
+ FAN_UNLIMITED_MARKS)
+
+/*
+ * fanotify_init() flags that are allowed for user without CAP_SYS_ADMIN.
+ * FAN_CLASS_NOTIF is the only class we allow for unprivileged group.
+ * We do not allow unprivileged groups to get file descriptors in events,
+ * so one of the flags for reporting file handles is required.
+ */
+#define FANOTIFY_USER_INIT_FLAGS (FAN_CLASS_NOTIF | \
+ FANOTIFY_FID_BITS | \
+ FAN_CLOEXEC | FAN_NONBLOCK)
+
+#define FANOTIFY_INIT_FLAGS (FANOTIFY_ADMIN_INIT_FLAGS | \
+ FANOTIFY_USER_INIT_FLAGS)
-#define FANOTIFY_INIT_FLAGS (FANOTIFY_CLASS_BITS | FANOTIFY_FID_BITS | \
- FAN_REPORT_TID | \
- FAN_CLOEXEC | FAN_NONBLOCK | \
- FAN_UNLIMITED_QUEUE | FAN_UNLIMITED_MARKS)
+/* Internal group flags */
+#define FANOTIFY_UNPRIV 0x80000000
+#define FANOTIFY_INTERNAL_GROUP_FLAGS (FANOTIFY_UNPRIV)
#define FANOTIFY_MARK_TYPE_BITS (FAN_MARK_INODE | FAN_MARK_MOUNT | \
FAN_MARK_FILESYSTEM)
+#define FANOTIFY_MARK_CMD_BITS (FAN_MARK_ADD | FAN_MARK_REMOVE | \
+ FAN_MARK_FLUSH)
+
+#define FANOTIFY_MARK_IGNORE_BITS (FAN_MARK_IGNORED_MASK | \
+ FAN_MARK_IGNORE)
+
#define FANOTIFY_MARK_FLAGS (FANOTIFY_MARK_TYPE_BITS | \
- FAN_MARK_ADD | \
- FAN_MARK_REMOVE | \
+ FANOTIFY_MARK_CMD_BITS | \
+ FANOTIFY_MARK_IGNORE_BITS | \
FAN_MARK_DONT_FOLLOW | \
FAN_MARK_ONLYDIR | \
- FAN_MARK_IGNORED_MASK | \
FAN_MARK_IGNORED_SURV_MODIFY | \
- FAN_MARK_FLUSH)
+ FAN_MARK_EVICTABLE)
/*
* Events that can be reported with data type FSNOTIFY_EVENT_PATH.
@@ -49,15 +87,23 @@
* Directory entry modification events - reported only to directory
* where entry is modified and not to a watching parent.
*/
-#define FANOTIFY_DIRENT_EVENTS (FAN_MOVE | FAN_CREATE | FAN_DELETE)
+#define FANOTIFY_DIRENT_EVENTS (FAN_MOVE | FAN_CREATE | FAN_DELETE | \
+ FAN_RENAME)
+
+/* Events that can be reported with event->fd */
+#define FANOTIFY_FD_EVENTS (FANOTIFY_PATH_EVENTS | FANOTIFY_PERM_EVENTS)
/* Events that can only be reported with data type FSNOTIFY_EVENT_INODE */
#define FANOTIFY_INODE_EVENTS (FANOTIFY_DIRENT_EVENTS | \
FAN_ATTRIB | FAN_MOVE_SELF | FAN_DELETE_SELF)
+/* Events that can only be reported with data type FSNOTIFY_EVENT_ERROR */
+#define FANOTIFY_ERROR_EVENTS (FAN_FS_ERROR)
+
/* Events that user can request to be notified on */
#define FANOTIFY_EVENTS (FANOTIFY_PATH_EVENTS | \
- FANOTIFY_INODE_EVENTS)
+ FANOTIFY_INODE_EVENTS | \
+ FANOTIFY_ERROR_EVENTS)
/* Events that require a permission response from user */
#define FANOTIFY_PERM_EVENTS (FAN_OPEN_PERM | FAN_ACCESS_PERM | \
@@ -71,6 +117,10 @@
FANOTIFY_PERM_EVENTS | \
FAN_Q_OVERFLOW | FAN_ONDIR)
+/* Events and flags relevant only for directories */
+#define FANOTIFY_DIRONLY_EVENT_BITS (FANOTIFY_DIRENT_EVENTS | \
+ FAN_EVENT_ON_CHILD | FAN_ONDIR)
+
#define ALL_FANOTIFY_EVENT_BITS (FANOTIFY_OUTGOING_EVENTS | \
FANOTIFY_EVENT_FLAGS)
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index f1a99d3e5570..4ed3589f9294 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -80,7 +80,7 @@ struct dentry;
/*
* The caller must ensure that fd table isn't shared or hold rcu or file lock
*/
-static inline struct file *__fcheck_files(struct files_struct *files, unsigned int fd)
+static inline struct file *files_lookup_fd_raw(struct files_struct *files, unsigned int fd)
{
struct fdtable *fdt = rcu_dereference_raw(files->fdt);
@@ -91,37 +91,40 @@ static inline struct file *__fcheck_files(struct files_struct *files, unsigned i
return NULL;
}
-static inline struct file *fcheck_files(struct files_struct *files, unsigned int fd)
+static inline struct file *files_lookup_fd_locked(struct files_struct *files, unsigned int fd)
{
- RCU_LOCKDEP_WARN(!rcu_read_lock_held() &&
- !lockdep_is_held(&files->file_lock),
+ RCU_LOCKDEP_WARN(!lockdep_is_held(&files->file_lock),
"suspicious rcu_dereference_check() usage");
- return __fcheck_files(files, fd);
+ return files_lookup_fd_raw(files, fd);
}
-/*
- * Check whether the specified fd has an open file.
- */
-#define fcheck(fd) fcheck_files(current->files, fd)
+static inline struct file *files_lookup_fd_rcu(struct files_struct *files, unsigned int fd)
+{
+ RCU_LOCKDEP_WARN(!rcu_read_lock_held(),
+ "suspicious rcu_dereference_check() usage");
+ return files_lookup_fd_raw(files, fd);
+}
+
+static inline struct file *lookup_fd_rcu(unsigned int fd)
+{
+ return files_lookup_fd_rcu(current->files, fd);
+}
+
+struct file *task_lookup_fd_rcu(struct task_struct *task, unsigned int fd);
+struct file *task_lookup_next_fd_rcu(struct task_struct *task, unsigned int *fd);
struct task_struct;
struct files_struct *get_files_struct(struct task_struct *);
void put_files_struct(struct files_struct *fs);
-void reset_files_struct(struct files_struct *);
-int unshare_files(struct files_struct **);
+int unshare_files(void);
struct files_struct *dup_fd(struct files_struct *, unsigned, int *) __latent_entropy;
void do_close_on_exec(struct files_struct *);
int iterate_fd(struct files_struct *, unsigned,
int (*)(const void *, struct file *, unsigned),
const void *);
-extern int __alloc_fd(struct files_struct *files,
- unsigned start, unsigned end, unsigned flags);
-extern void __fd_install(struct files_struct *files,
- unsigned int fd, struct file *file);
-extern int __close_fd(struct files_struct *files,
- unsigned int fd);
+extern int close_fd(unsigned int fd);
extern int __close_range(unsigned int fd, unsigned int max_fd, unsigned int flags);
extern int close_fd_get_file(unsigned int fd, struct file **res);
extern int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6de70634e547..6a26ef54ac25 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -996,6 +996,7 @@ static inline struct file *get_file(struct file *f)
#define FL_UNLOCK_PENDING 512 /* Lease is being broken */
#define FL_OFDLCK 1024 /* lock is "owned" by struct file */
#define FL_LAYOUT 2048 /* outstanding pNFS layout */
+#define FL_RECLAIM 4096 /* reclaiming from a reboot server */
#define FL_CLOSE_POSIX (FL_POSIX | FL_CLOSE)
@@ -1016,6 +1017,7 @@ struct file_lock_operations {
};
struct lock_manager_operations {
+ void *lm_mod_owner;
fl_owner_t (*lm_get_owner)(fl_owner_t);
void (*lm_put_owner)(fl_owner_t);
void (*lm_notify)(struct file_lock *); /* unblock callback */
@@ -1024,6 +1026,8 @@ struct lock_manager_operations {
int (*lm_change)(struct file_lock *, int, struct list_head *);
void (*lm_setup)(struct file_lock *, void **);
bool (*lm_breaker_owns_lease)(struct file_lock *);
+ bool (*lm_lock_expirable)(struct file_lock *cfl);
+ void (*lm_expire_lock)(void);
};
struct lock_manager {
@@ -1162,6 +1166,15 @@ extern void lease_unregister_notifier(struct notifier_block *);
struct files_struct;
extern void show_fd_locks(struct seq_file *f,
struct file *filp, struct files_struct *files);
+extern bool locks_owner_has_blockers(struct file_lock_context *flctx,
+ fl_owner_t owner);
+
+static inline struct file_lock_context *
+locks_inode_context(const struct inode *inode)
+{
+ return smp_load_acquire(&inode->i_flctx);
+}
+
#else /* !CONFIG_FILE_LOCKING */
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
struct flock __user *user)
@@ -1302,6 +1315,18 @@ static inline int lease_modify(struct file_lock *fl, int arg,
struct files_struct;
static inline void show_fd_locks(struct seq_file *f,
struct file *filp, struct files_struct *files) {}
+static inline bool locks_owner_has_blockers(struct file_lock_context *flctx,
+ fl_owner_t owner)
+{
+ return false;
+}
+
+static inline struct file_lock_context *
+locks_inode_context(const struct inode *inode)
+{
+ return NULL;
+}
+
#endif /* !CONFIG_FILE_LOCKING */
static inline struct inode *file_inode(const struct file *f)
@@ -1512,8 +1537,11 @@ struct super_block {
/* Number of inodes with nlink == 0 but still referenced */
atomic_long_t s_remove_count;
- /* Pending fsnotify inode refs */
- atomic_long_t s_fsnotify_inode_refs;
+ /*
+ * Number of inode/mount/sb objects that are being watched, note that
+ * inodes objects are currently double-accounted.
+ */
+ atomic_long_t s_fsnotify_connectors;
/* Being remounted read-only */
int s_readonly_remount;
@@ -1780,7 +1808,17 @@ extern int vfs_symlink(struct inode *, struct dentry *, const char *);
extern int vfs_link(struct dentry *, struct inode *, struct dentry *, struct inode **);
extern int vfs_rmdir(struct inode *, struct dentry *);
extern int vfs_unlink(struct inode *, struct dentry *, struct inode **);
-extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int);
+
+struct renamedata {
+ struct inode *old_dir;
+ struct dentry *old_dentry;
+ struct inode *new_dir;
+ struct dentry *new_dentry;
+ struct inode **delegated_inode;
+ unsigned int flags;
+} __randomize_layout;
+
+int vfs_rename(struct renamedata *);
static inline int vfs_whiteout(struct inode *dir, struct dentry *dentry)
{
@@ -2594,6 +2632,8 @@ extern struct file *filp_open(const char *, int, umode_t);
extern struct file *file_open_root(struct dentry *, struct vfsmount *,
const char *, int, umode_t);
extern struct file * dentry_open(const struct path *, int, const struct cred *);
+extern struct file *dentry_create(const struct path *path, int flags,
+ umode_t mode, const struct cred *cred);
extern struct file * open_with_fake_path(const struct path *, int,
struct inode*, const struct cred *);
static inline struct file *file_clone_open(struct file *file)
@@ -2824,6 +2864,14 @@ static inline int bmap(struct inode *inode, sector_t *block)
extern int notify_change(struct dentry *, struct iattr *, struct inode **);
extern int inode_permission(struct inode *, int);
extern int generic_permission(struct inode *, int);
+static inline int file_permission(struct file *file, int mask)
+{
+ return inode_permission(file_inode(file), mask);
+}
+static inline int path_permission(const struct path *path, int mask)
+{
+ return inode_permission(d_inode(path->dentry), mask);
+}
extern int __check_sticky(struct inode *dir, struct inode *inode);
static inline bool execute_ok(struct inode *inode)
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 79add91eaa04..bb8467cd11ae 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -26,21 +26,27 @@
* FS_EVENT_ON_CHILD mask on the parent inode and will not be reported if only
* the child is interested and not the parent.
*/
-static inline void fsnotify_name(struct inode *dir, __u32 mask,
- struct inode *child,
- const struct qstr *name, u32 cookie)
+static inline int fsnotify_name(__u32 mask, const void *data, int data_type,
+ struct inode *dir, const struct qstr *name,
+ u32 cookie)
{
- fsnotify(mask, child, FSNOTIFY_EVENT_INODE, dir, name, NULL, cookie);
+ if (atomic_long_read(&dir->i_sb->s_fsnotify_connectors) == 0)
+ return 0;
+
+ return fsnotify(mask, data, data_type, dir, name, NULL, cookie);
}
static inline void fsnotify_dirent(struct inode *dir, struct dentry *dentry,
__u32 mask)
{
- fsnotify_name(dir, mask, d_inode(dentry), &dentry->d_name, 0);
+ fsnotify_name(mask, dentry, FSNOTIFY_EVENT_DENTRY, dir, &dentry->d_name, 0);
}
static inline void fsnotify_inode(struct inode *inode, __u32 mask)
{
+ if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
+ return;
+
if (S_ISDIR(inode->i_mode))
mask |= FS_ISDIR;
@@ -53,6 +59,9 @@ static inline int fsnotify_parent(struct dentry *dentry, __u32 mask,
{
struct inode *inode = d_inode(dentry);
+ if (atomic_long_read(&inode->i_sb->s_fsnotify_connectors) == 0)
+ return 0;
+
if (S_ISDIR(inode->i_mode)) {
mask |= FS_ISDIR;
@@ -77,7 +86,7 @@ static inline int fsnotify_parent(struct dentry *dentry, __u32 mask,
*/
static inline void fsnotify_dentry(struct dentry *dentry, __u32 mask)
{
- fsnotify_parent(dentry, mask, d_inode(dentry), FSNOTIFY_EVENT_INODE);
+ fsnotify_parent(dentry, mask, dentry, FSNOTIFY_EVENT_DENTRY);
}
static inline int fsnotify_file(struct file *file, __u32 mask)
@@ -135,18 +144,23 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
u32 fs_cookie = fsnotify_get_cookie();
__u32 old_dir_mask = FS_MOVED_FROM;
__u32 new_dir_mask = FS_MOVED_TO;
+ __u32 rename_mask = FS_RENAME;
const struct qstr *new_name = &moved->d_name;
- if (old_dir == new_dir)
- old_dir_mask |= FS_DN_RENAME;
-
if (isdir) {
old_dir_mask |= FS_ISDIR;
new_dir_mask |= FS_ISDIR;
+ rename_mask |= FS_ISDIR;
}
- fsnotify_name(old_dir, old_dir_mask, source, old_name, fs_cookie);
- fsnotify_name(new_dir, new_dir_mask, source, new_name, fs_cookie);
+ /* Event with information about both old and new parent+name */
+ fsnotify_name(rename_mask, moved, FSNOTIFY_EVENT_DENTRY,
+ old_dir, old_name, 0);
+
+ fsnotify_name(old_dir_mask, source, FSNOTIFY_EVENT_INODE,
+ old_dir, old_name, fs_cookie);
+ fsnotify_name(new_dir_mask, source, FSNOTIFY_EVENT_INODE,
+ new_dir, new_name, fs_cookie);
if (target)
fsnotify_link_count(target);
@@ -181,16 +195,22 @@ static inline void fsnotify_inoderemove(struct inode *inode)
/*
* fsnotify_create - 'name' was linked in
+ *
+ * Caller must make sure that dentry->d_name is stable.
+ * Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
+ * ->d_inode later
*/
-static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
+static inline void fsnotify_create(struct inode *dir, struct dentry *dentry)
{
- audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
+ audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);
- fsnotify_dirent(inode, dentry, FS_CREATE);
+ fsnotify_dirent(dir, dentry, FS_CREATE);
}
/*
* fsnotify_link - new hardlink in 'inode' directory
+ *
+ * Caller must make sure that new_dentry->d_name is stable.
* Note: We have to pass also the linked inode ptr as some filesystems leave
* new_dentry->d_inode NULL and instantiate inode pointer later
*/
@@ -200,7 +220,8 @@ static inline void fsnotify_link(struct inode *dir, struct inode *inode,
fsnotify_link_count(inode);
audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
- fsnotify_name(dir, FS_CREATE, inode, &new_dentry->d_name, 0);
+ fsnotify_name(FS_CREATE, inode, FSNOTIFY_EVENT_INODE,
+ dir, &new_dentry->d_name, 0);
}
/*
@@ -219,7 +240,8 @@ static inline void fsnotify_delete(struct inode *dir, struct inode *inode,
if (S_ISDIR(inode->i_mode))
mask |= FS_ISDIR;
- fsnotify_name(dir, mask, inode, &dentry->d_name, 0);
+ fsnotify_name(mask, inode, FSNOTIFY_EVENT_INODE, dir, &dentry->d_name,
+ 0);
}
/**
@@ -254,12 +276,16 @@ static inline void fsnotify_unlink(struct inode *dir, struct dentry *dentry)
/*
* fsnotify_mkdir - directory 'name' was created
+ *
+ * Caller must make sure that dentry->d_name is stable.
+ * Note: some filesystems (e.g. kernfs) leave @dentry negative and instantiate
+ * ->d_inode later
*/
-static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
+static inline void fsnotify_mkdir(struct inode *dir, struct dentry *dentry)
{
- audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
+ audit_inode_child(dir, dentry, AUDIT_TYPE_CHILD_CREATE);
- fsnotify_dirent(inode, dentry, FS_CREATE | FS_ISDIR);
+ fsnotify_dirent(dir, dentry, FS_CREATE | FS_ISDIR);
}
/*
@@ -353,4 +379,17 @@ static inline void fsnotify_change(struct dentry *dentry, unsigned int ia_valid)
fsnotify_dentry(dentry, mask);
}
+static inline int fsnotify_sb_error(struct super_block *sb, struct inode *inode,
+ int error)
+{
+ struct fs_error_report report = {
+ .error = error,
+ .inode = inode,
+ .sb = sb,
+ };
+
+ return fsnotify(FS_ERROR, &report, FSNOTIFY_EVENT_ERROR,
+ NULL, NULL, NULL, 0);
+}
+
#endif /* _LINUX_FS_NOTIFY_H */
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index a2e42d3cd87c..d7d96c806bff 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -19,6 +19,8 @@
#include <linux/atomic.h>
#include <linux/user_namespace.h>
#include <linux/refcount.h>
+#include <linux/mempool.h>
+#include <linux/sched/mm.h>
/*
* IN_* from inotfy.h lines up EXACTLY with FS_*, this is so we can easily
@@ -42,13 +44,18 @@
#define FS_UNMOUNT 0x00002000 /* inode on umount fs */
#define FS_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
+#define FS_ERROR 0x00008000 /* Filesystem Error (fanotify) */
+
+/*
+ * FS_IN_IGNORED overloads FS_ERROR. It is only used internally by inotify
+ * which does not support FS_ERROR.
+ */
#define FS_IN_IGNORED 0x00008000 /* last inotify event here */
#define FS_OPEN_PERM 0x00010000 /* open event in an permission hook */
#define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */
#define FS_OPEN_EXEC_PERM 0x00040000 /* open/exec event in a permission hook */
-#define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */
/*
* Set on inode mark that cares about things that happen to its children.
* Always set for dnotify and inotify.
@@ -56,10 +63,9 @@
*/
#define FS_EVENT_ON_CHILD 0x08000000
-#define FS_DN_RENAME 0x10000000 /* file renamed */
+#define FS_RENAME 0x10000000 /* File was renamed */
#define FS_DN_MULTISHOT 0x20000000 /* dnotify multishot */
#define FS_ISDIR 0x40000000 /* event occurred against dir */
-#define FS_IN_ONESHOT 0x80000000 /* only send event once */
#define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO)
@@ -69,7 +75,7 @@
* The watching parent may get an FS_ATTRIB|FS_EVENT_ON_CHILD event
* when a directory entry inside a child subdir changes.
*/
-#define ALL_FSNOTIFY_DIRENT_EVENTS (FS_CREATE | FS_DELETE | FS_MOVE)
+#define ALL_FSNOTIFY_DIRENT_EVENTS (FS_CREATE | FS_DELETE | FS_MOVE | FS_RENAME)
#define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM | \
FS_OPEN_EXEC_PERM)
@@ -94,12 +100,12 @@
/* Events that can be reported to backends */
#define ALL_FSNOTIFY_EVENTS (ALL_FSNOTIFY_DIRENT_EVENTS | \
FS_EVENTS_POSS_ON_CHILD | \
- FS_DELETE_SELF | FS_MOVE_SELF | FS_DN_RENAME | \
- FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED)
+ FS_DELETE_SELF | FS_MOVE_SELF | \
+ FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \
+ FS_ERROR)
/* Extra flags that may be reported with event or control handling of events */
-#define ALL_FSNOTIFY_FLAGS (FS_EXCL_UNLINK | FS_ISDIR | FS_IN_ONESHOT | \
- FS_DN_MULTISHOT | FS_EVENT_ON_CHILD)
+#define ALL_FSNOTIFY_FLAGS (FS_ISDIR | FS_EVENT_ON_CHILD | FS_DN_MULTISHOT)
#define ALL_FSNOTIFY_BITS (ALL_FSNOTIFY_EVENTS | ALL_FSNOTIFY_FLAGS)
@@ -136,6 +142,7 @@ struct mem_cgroup;
* @dir: optional directory associated with event -
* if @file_name is not NULL, this is the directory that
* @file_name is relative to.
+ * Either @inode or @dir must be non-NULL.
* @file_name: optional file name associated with event
* @cookie: inotify rename cookie
*
@@ -155,7 +162,7 @@ struct fsnotify_ops {
const struct qstr *file_name, u32 cookie);
void (*free_group_priv)(struct fsnotify_group *group);
void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
- void (*free_event)(struct fsnotify_event *event);
+ void (*free_event)(struct fsnotify_group *group, struct fsnotify_event *event);
/* called on final put+free to free memory */
void (*free_mark)(struct fsnotify_mark *mark);
};
@@ -167,7 +174,6 @@ struct fsnotify_ops {
*/
struct fsnotify_event {
struct list_head list;
- unsigned long objectid; /* identifier for queue merges */
};
/*
@@ -205,11 +211,14 @@ struct fsnotify_group {
unsigned int priority;
bool shutdown; /* group is being shut down, don't queue more events */
+#define FSNOTIFY_GROUP_USER 0x01 /* user allocated group */
+#define FSNOTIFY_GROUP_DUPS 0x02 /* allow multiple marks per object */
+#define FSNOTIFY_GROUP_NOFS 0x04 /* group lock is not direct reclaim safe */
+ int flags;
+ unsigned int owner_flags; /* stored flags of mark_mutex owner */
+
/* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
struct mutex mark_mutex; /* protect marks_list */
- atomic_t num_marks; /* 1 for each mark and 1 for not being
- * past the point of no return when freeing
- * a group */
atomic_t user_waits; /* Number of tasks waiting for user
* response */
struct list_head marks_list; /* all inode marks for this group */
@@ -234,23 +243,58 @@ struct fsnotify_group {
#endif
#ifdef CONFIG_FANOTIFY
struct fanotify_group_private_data {
+ /* Hash table of events for merge */
+ struct hlist_head *merge_hash;
/* allows a group to block waiting for a userspace response */
struct list_head access_list;
wait_queue_head_t access_waitq;
int flags; /* flags from fanotify_init() */
int f_flags; /* event_f_flags from fanotify_init() */
- unsigned int max_marks;
- struct user_struct *user;
+ struct ucounts *ucounts;
+ mempool_t error_events_pool;
} fanotify_data;
#endif /* CONFIG_FANOTIFY */
};
};
+/*
+ * These helpers are used to prevent deadlock when reclaiming inodes with
+ * evictable marks of the same group that is allocating a new mark.
+ */
+static inline void fsnotify_group_lock(struct fsnotify_group *group)
+{
+ mutex_lock(&group->mark_mutex);
+ if (group->flags & FSNOTIFY_GROUP_NOFS)
+ group->owner_flags = memalloc_nofs_save();
+}
+
+static inline void fsnotify_group_unlock(struct fsnotify_group *group)
+{
+ if (group->flags & FSNOTIFY_GROUP_NOFS)
+ memalloc_nofs_restore(group->owner_flags);
+ mutex_unlock(&group->mark_mutex);
+}
+
+static inline void fsnotify_group_assert_locked(struct fsnotify_group *group)
+{
+ WARN_ON_ONCE(!mutex_is_locked(&group->mark_mutex));
+ if (group->flags & FSNOTIFY_GROUP_NOFS)
+ WARN_ON_ONCE(!(current->flags & PF_MEMALLOC_NOFS));
+}
+
/* When calling fsnotify tell it if the data is a path or inode */
enum fsnotify_data_type {
FSNOTIFY_EVENT_NONE,
FSNOTIFY_EVENT_PATH,
FSNOTIFY_EVENT_INODE,
+ FSNOTIFY_EVENT_DENTRY,
+ FSNOTIFY_EVENT_ERROR,
+};
+
+struct fs_error_report {
+ int error;
+ struct inode *inode;
+ struct super_block *sb;
};
static inline struct inode *fsnotify_data_inode(const void *data, int data_type)
@@ -258,8 +302,25 @@ static inline struct inode *fsnotify_data_inode(const void *data, int data_type)
switch (data_type) {
case FSNOTIFY_EVENT_INODE:
return (struct inode *)data;
+ case FSNOTIFY_EVENT_DENTRY:
+ return d_inode(data);
case FSNOTIFY_EVENT_PATH:
return d_inode(((const struct path *)data)->dentry);
+ case FSNOTIFY_EVENT_ERROR:
+ return ((struct fs_error_report *)data)->inode;
+ default:
+ return NULL;
+ }
+}
+
+static inline struct dentry *fsnotify_data_dentry(const void *data, int data_type)
+{
+ switch (data_type) {
+ case FSNOTIFY_EVENT_DENTRY:
+ /* Non const is needed for dget() */
+ return (struct dentry *)data;
+ case FSNOTIFY_EVENT_PATH:
+ return ((const struct path *)data)->dentry;
default:
return NULL;
}
@@ -276,58 +337,110 @@ static inline const struct path *fsnotify_data_path(const void *data,
}
}
+static inline struct super_block *fsnotify_data_sb(const void *data,
+ int data_type)
+{
+ switch (data_type) {
+ case FSNOTIFY_EVENT_INODE:
+ return ((struct inode *)data)->i_sb;
+ case FSNOTIFY_EVENT_DENTRY:
+ return ((struct dentry *)data)->d_sb;
+ case FSNOTIFY_EVENT_PATH:
+ return ((const struct path *)data)->dentry->d_sb;
+ case FSNOTIFY_EVENT_ERROR:
+ return ((struct fs_error_report *) data)->sb;
+ default:
+ return NULL;
+ }
+}
+
+static inline struct fs_error_report *fsnotify_data_error_report(
+ const void *data,
+ int data_type)
+{
+ switch (data_type) {
+ case FSNOTIFY_EVENT_ERROR:
+ return (struct fs_error_report *) data;
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * Index to merged marks iterator array that correlates to a type of watch.
+ * The type of watched object can be deduced from the iterator type, but not
+ * the other way around, because an event can match different watched objects
+ * of the same object type.
+ * For example, both parent and child are watching an object of type inode.
+ */
+enum fsnotify_iter_type {
+ FSNOTIFY_ITER_TYPE_INODE,
+ FSNOTIFY_ITER_TYPE_VFSMOUNT,
+ FSNOTIFY_ITER_TYPE_SB,
+ FSNOTIFY_ITER_TYPE_PARENT,
+ FSNOTIFY_ITER_TYPE_INODE2,
+ FSNOTIFY_ITER_TYPE_COUNT
+};
+
+/* The type of object that a mark is attached to */
enum fsnotify_obj_type {
+ FSNOTIFY_OBJ_TYPE_ANY = -1,
FSNOTIFY_OBJ_TYPE_INODE,
- FSNOTIFY_OBJ_TYPE_PARENT,
FSNOTIFY_OBJ_TYPE_VFSMOUNT,
FSNOTIFY_OBJ_TYPE_SB,
FSNOTIFY_OBJ_TYPE_COUNT,
FSNOTIFY_OBJ_TYPE_DETACHED = FSNOTIFY_OBJ_TYPE_COUNT
};
-#define FSNOTIFY_OBJ_TYPE_INODE_FL (1U << FSNOTIFY_OBJ_TYPE_INODE)
-#define FSNOTIFY_OBJ_TYPE_PARENT_FL (1U << FSNOTIFY_OBJ_TYPE_PARENT)
-#define FSNOTIFY_OBJ_TYPE_VFSMOUNT_FL (1U << FSNOTIFY_OBJ_TYPE_VFSMOUNT)
-#define FSNOTIFY_OBJ_TYPE_SB_FL (1U << FSNOTIFY_OBJ_TYPE_SB)
-#define FSNOTIFY_OBJ_ALL_TYPES_MASK ((1U << FSNOTIFY_OBJ_TYPE_COUNT) - 1)
-
-static inline bool fsnotify_valid_obj_type(unsigned int type)
+static inline bool fsnotify_valid_obj_type(unsigned int obj_type)
{
- return (type < FSNOTIFY_OBJ_TYPE_COUNT);
+ return (obj_type < FSNOTIFY_OBJ_TYPE_COUNT);
}
struct fsnotify_iter_info {
- struct fsnotify_mark *marks[FSNOTIFY_OBJ_TYPE_COUNT];
+ struct fsnotify_mark *marks[FSNOTIFY_ITER_TYPE_COUNT];
+ struct fsnotify_group *current_group;
unsigned int report_mask;
int srcu_idx;
};
static inline bool fsnotify_iter_should_report_type(
- struct fsnotify_iter_info *iter_info, int type)
+ struct fsnotify_iter_info *iter_info, int iter_type)
{
- return (iter_info->report_mask & (1U << type));
+ return (iter_info->report_mask & (1U << iter_type));
}
static inline void fsnotify_iter_set_report_type(
- struct fsnotify_iter_info *iter_info, int type)
+ struct fsnotify_iter_info *iter_info, int iter_type)
+{
+ iter_info->report_mask |= (1U << iter_type);
+}
+
+static inline struct fsnotify_mark *fsnotify_iter_mark(
+ struct fsnotify_iter_info *iter_info, int iter_type)
{
- iter_info->report_mask |= (1U << type);
+ if (fsnotify_iter_should_report_type(iter_info, iter_type))
+ return iter_info->marks[iter_type];
+ return NULL;
}
-static inline void fsnotify_iter_set_report_type_mark(
- struct fsnotify_iter_info *iter_info, int type,
- struct fsnotify_mark *mark)
+static inline int fsnotify_iter_step(struct fsnotify_iter_info *iter, int type,
+ struct fsnotify_mark **markp)
{
- iter_info->marks[type] = mark;
- iter_info->report_mask |= (1U << type);
+ while (type < FSNOTIFY_ITER_TYPE_COUNT) {
+ *markp = fsnotify_iter_mark(iter, type);
+ if (*markp)
+ break;
+ type++;
+ }
+ return type;
}
#define FSNOTIFY_ITER_FUNCS(name, NAME) \
static inline struct fsnotify_mark *fsnotify_iter_##name##_mark( \
struct fsnotify_iter_info *iter_info) \
{ \
- return (iter_info->report_mask & FSNOTIFY_OBJ_TYPE_##NAME##_FL) ? \
- iter_info->marks[FSNOTIFY_OBJ_TYPE_##NAME] : NULL; \
+ return fsnotify_iter_mark(iter_info, FSNOTIFY_ITER_TYPE_##NAME); \
}
FSNOTIFY_ITER_FUNCS(inode, INODE)
@@ -335,8 +448,13 @@ FSNOTIFY_ITER_FUNCS(parent, PARENT)
FSNOTIFY_ITER_FUNCS(vfsmount, VFSMOUNT)
FSNOTIFY_ITER_FUNCS(sb, SB)
-#define fsnotify_foreach_obj_type(type) \
- for (type = 0; type < FSNOTIFY_OBJ_TYPE_COUNT; type++)
+#define fsnotify_foreach_iter_type(type) \
+ for (type = 0; type < FSNOTIFY_ITER_TYPE_COUNT; type++)
+#define fsnotify_foreach_iter_mark_type(iter, mark, type) \
+ for (type = 0; \
+ type = fsnotify_iter_step(iter, type, &mark), \
+ type < FSNOTIFY_ITER_TYPE_COUNT; \
+ type++)
/*
* fsnotify_connp_t is what we embed in objects which connector can be attached
@@ -355,6 +473,7 @@ struct fsnotify_mark_connector {
spinlock_t lock;
unsigned short type; /* Type of object [lock] */
#define FSNOTIFY_CONN_FLAG_HAS_FSID 0x01
+#define FSNOTIFY_CONN_FLAG_HAS_IREF 0x02
unsigned short flags; /* flags [lock] */
__kernel_fsid_t fsid; /* fsid of filesystem containing object */
union {
@@ -399,11 +518,18 @@ struct fsnotify_mark {
struct hlist_node obj_list;
/* Head of list of marks for an object [mark ref] */
struct fsnotify_mark_connector *connector;
- /* Events types to ignore [mark->lock, group->mark_mutex] */
- __u32 ignored_mask;
-#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01
-#define FSNOTIFY_MARK_FLAG_ALIVE 0x02
-#define FSNOTIFY_MARK_FLAG_ATTACHED 0x04
+ /* Events types and flags to ignore [mark->lock, group->mark_mutex] */
+ __u32 ignore_mask;
+ /* General fsnotify mark flags */
+#define FSNOTIFY_MARK_FLAG_ALIVE 0x0001
+#define FSNOTIFY_MARK_FLAG_ATTACHED 0x0002
+ /* inotify mark flags */
+#define FSNOTIFY_MARK_FLAG_EXCL_UNLINK 0x0010
+#define FSNOTIFY_MARK_FLAG_IN_ONESHOT 0x0020
+ /* fanotify mark flags */
+#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x0100
+#define FSNOTIFY_MARK_FLAG_NO_IREF 0x0200
+#define FSNOTIFY_MARK_FLAG_HAS_IGNORE_FLAGS 0x0400
unsigned int flags; /* flags [mark->lock] */
};
@@ -469,7 +595,9 @@ static inline void fsnotify_update_flags(struct dentry *dentry)
/* called from fsnotify listeners, such as fanotify or dnotify */
/* create a new group */
-extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
+extern struct fsnotify_group *fsnotify_alloc_group(
+ const struct fsnotify_ops *ops,
+ int flags);
/* get reference to a group */
extern void fsnotify_get_group(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */
@@ -484,17 +612,39 @@ extern int fsnotify_fasync(int fd, struct file *file, int on);
extern void fsnotify_destroy_event(struct fsnotify_group *group,
struct fsnotify_event *event);
/* attach the event to the group notification queue */
-extern int fsnotify_add_event(struct fsnotify_group *group,
- struct fsnotify_event *event,
- int (*merge)(struct list_head *,
- struct fsnotify_event *));
+extern int fsnotify_insert_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ int (*merge)(struct fsnotify_group *,
+ struct fsnotify_event *),
+ void (*insert)(struct fsnotify_group *,
+ struct fsnotify_event *));
+
+static inline int fsnotify_add_event(struct fsnotify_group *group,
+ struct fsnotify_event *event,
+ int (*merge)(struct fsnotify_group *,
+ struct fsnotify_event *))
+{
+ return fsnotify_insert_event(group, event, merge, NULL);
+}
+
/* Queue overflow event to a notification group */
static inline void fsnotify_queue_overflow(struct fsnotify_group *group)
{
fsnotify_add_event(group, group->overflow_event, NULL);
}
-/* true if the group notification queue is empty */
+static inline bool fsnotify_is_overflow_event(u32 mask)
+{
+ return mask & FS_Q_OVERFLOW;
+}
+
+static inline bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group)
+{
+ assert_spin_locked(&group->notification_lock);
+
+ return list_empty(&group->notification_list);
+}
+
extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
/* return, but do not dequeue the first event on the notification queue */
extern struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group);
@@ -506,6 +656,101 @@ extern void fsnotify_remove_queued_event(struct fsnotify_group *group,
/* functions used to manipulate the marks attached to inodes */
+/*
+ * Canonical "ignore mask" including event flags.
+ *
+ * Note the subtle semantic difference from the legacy ->ignored_mask.
+ * ->ignored_mask traditionally only meant which events should be ignored,
+ * while ->ignore_mask also includes flags regarding the type of objects on
+ * which events should be ignored.
+ */
+static inline __u32 fsnotify_ignore_mask(struct fsnotify_mark *mark)
+{
+ __u32 ignore_mask = mark->ignore_mask;
+
+ /* The event flags in ignore mask take effect */
+ if (mark->flags & FSNOTIFY_MARK_FLAG_HAS_IGNORE_FLAGS)
+ return ignore_mask;
+
+ /*
+ * Legacy behavior:
+ * - Always ignore events on dir
+ * - Ignore events on child if parent is watching children
+ */
+ ignore_mask |= FS_ISDIR;
+ ignore_mask &= ~FS_EVENT_ON_CHILD;
+ ignore_mask |= mark->mask & FS_EVENT_ON_CHILD;
+
+ return ignore_mask;
+}
+
+/* Legacy ignored_mask - only event types to ignore */
+static inline __u32 fsnotify_ignored_events(struct fsnotify_mark *mark)
+{
+ return mark->ignore_mask & ALL_FSNOTIFY_EVENTS;
+}
+
+/*
+ * Check if mask (or ignore mask) should be applied depending if victim is a
+ * directory and whether it is reported to a watching parent.
+ */
+static inline bool fsnotify_mask_applicable(__u32 mask, bool is_dir,
+ int iter_type)
+{
+ /* Should mask be applied to a directory? */
+ if (is_dir && !(mask & FS_ISDIR))
+ return false;
+
+ /* Should mask be applied to a child? */
+ if (iter_type == FSNOTIFY_ITER_TYPE_PARENT &&
+ !(mask & FS_EVENT_ON_CHILD))
+ return false;
+
+ return true;
+}
+
+/*
+ * Effective ignore mask taking into account if event victim is a
+ * directory and whether it is reported to a watching parent.
+ */
+static inline __u32 fsnotify_effective_ignore_mask(struct fsnotify_mark *mark,
+ bool is_dir, int iter_type)
+{
+ __u32 ignore_mask = fsnotify_ignored_events(mark);
+
+ if (!ignore_mask)
+ return 0;
+
+ /* For non-dir and non-child, no need to consult the event flags */
+ if (!is_dir && iter_type != FSNOTIFY_ITER_TYPE_PARENT)
+ return ignore_mask;
+
+ ignore_mask = fsnotify_ignore_mask(mark);
+ if (!fsnotify_mask_applicable(ignore_mask, is_dir, iter_type))
+ return 0;
+
+ return ignore_mask & ALL_FSNOTIFY_EVENTS;
+}
+
+/* Get mask for calculating object interest taking ignore mask into account */
+static inline __u32 fsnotify_calc_mask(struct fsnotify_mark *mark)
+{
+ __u32 mask = mark->mask;
+
+ if (!fsnotify_ignored_events(mark))
+ return mask;
+
+ /* Interest in FS_MODIFY may be needed for clearing ignore mask */
+ if (!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
+ mask |= FS_MODIFY;
+
+ /*
+ * If mark is interested in ignoring events on children, the object must
+ * show interest in those events for fsnotify_parent() to notice it.
+ */
+ return mask | mark->ignore_mask;
+}
+
/* Get mask of events for a list of marks */
extern __u32 fsnotify_conn_mask(struct fsnotify_mark_connector *conn);
/* Calculate mask of events for a list of marks */
@@ -520,27 +765,27 @@ extern int fsnotify_get_conn_fsid(const struct fsnotify_mark_connector *conn,
__kernel_fsid_t *fsid);
/* attach the mark to the object */
extern int fsnotify_add_mark(struct fsnotify_mark *mark,
- fsnotify_connp_t *connp, unsigned int type,
- int allow_dups, __kernel_fsid_t *fsid);
+ fsnotify_connp_t *connp, unsigned int obj_type,
+ int add_flags, __kernel_fsid_t *fsid);
extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
fsnotify_connp_t *connp,
- unsigned int type, int allow_dups,
+ unsigned int obj_type, int add_flags,
__kernel_fsid_t *fsid);
/* attach the mark to the inode */
static inline int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
struct inode *inode,
- int allow_dups)
+ int add_flags)
{
return fsnotify_add_mark(mark, &inode->i_fsnotify_marks,
- FSNOTIFY_OBJ_TYPE_INODE, allow_dups, NULL);
+ FSNOTIFY_OBJ_TYPE_INODE, add_flags, NULL);
}
static inline int fsnotify_add_inode_mark_locked(struct fsnotify_mark *mark,
struct inode *inode,
- int allow_dups)
+ int add_flags)
{
return fsnotify_add_mark_locked(mark, &inode->i_fsnotify_marks,
- FSNOTIFY_OBJ_TYPE_INODE, allow_dups,
+ FSNOTIFY_OBJ_TYPE_INODE, add_flags,
NULL);
}
@@ -553,33 +798,32 @@ extern void fsnotify_detach_mark(struct fsnotify_mark *mark);
extern void fsnotify_free_mark(struct fsnotify_mark *mark);
/* Wait until all marks queued for destruction are destroyed */
extern void fsnotify_wait_marks_destroyed(void);
-/* run all the marks in a group, and clear all of the marks attached to given object type */
-extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group, unsigned int type);
+/* Clear all of the marks of a group attached to a given object type */
+extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group,
+ unsigned int obj_type);
/* run all the marks in a group, and clear all of the vfsmount marks */
static inline void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group)
{
- fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_VFSMOUNT_FL);
+ fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_VFSMOUNT);
}
/* run all the marks in a group, and clear all of the inode marks */
static inline void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group)
{
- fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_INODE_FL);
+ fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_INODE);
}
/* run all the marks in a group, and clear all of the sn marks */
static inline void fsnotify_clear_sb_marks_by_group(struct fsnotify_group *group)
{
- fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_SB_FL);
+ fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_SB);
}
extern void fsnotify_get_mark(struct fsnotify_mark *mark);
extern void fsnotify_put_mark(struct fsnotify_mark *mark);
extern void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info);
extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info);
-static inline void fsnotify_init_event(struct fsnotify_event *event,
- unsigned long objectid)
+static inline void fsnotify_init_event(struct fsnotify_event *event)
{
INIT_LIST_HEAD(&event->list);
- event->objectid = objectid;
}
#else
diff --git a/include/linux/iversion.h b/include/linux/iversion.h
index 2917ef990d43..3bfebde5a1a6 100644
--- a/include/linux/iversion.h
+++ b/include/linux/iversion.h
@@ -328,6 +328,19 @@ inode_query_iversion(struct inode *inode)
return cur >> I_VERSION_QUERIED_SHIFT;
}
+/*
+ * For filesystems without any sort of change attribute, the best we can
+ * do is fake one up from the ctime:
+ */
+static inline u64 time_to_chattr(struct timespec64 *t)
+{
+ u64 chattr = t->tv_sec;
+
+ chattr <<= 32;
+ chattr += t->tv_nsec;
+ return chattr;
+}
+
/**
* inode_eq_iversion_raw - check whether the raw i_version counter has changed
* @inode: inode to check
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 481273f0c72d..465060acc981 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -71,15 +71,14 @@ static inline void *dereference_symbol_descriptor(void *ptr)
return ptr;
}
-#ifdef CONFIG_KALLSYMS
-/* Lookup the address for a symbol. Returns 0 if not found. */
-unsigned long kallsyms_lookup_name(const char *name);
-
-/* Call a function on each kallsyms symbol in the core kernel */
int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
unsigned long),
void *data);
+#ifdef CONFIG_KALLSYMS
+/* Lookup the address for a symbol. Returns 0 if not found. */
+unsigned long kallsyms_lookup_name(const char *name);
+
extern int kallsyms_lookup_size_offset(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset);
@@ -108,14 +107,6 @@ static inline unsigned long kallsyms_lookup_name(const char *name)
return 0;
}
-static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
- struct module *,
- unsigned long),
- void *data)
-{
- return 0;
-}
-
static inline int kallsyms_lookup_size_offset(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset)
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 2484ed97e72f..9dae77a97a03 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -68,6 +68,7 @@ void *kthread_probe_data(struct task_struct *k);
int kthread_park(struct task_struct *k);
void kthread_unpark(struct task_struct *k);
void kthread_parkme(void);
+void kthread_exit(long result) __noreturn;
int kthreadd(void *unused);
extern struct task_struct *kthreadd_task;
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index 0520c0cd73f4..3bc9f7410e21 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -27,7 +27,8 @@ struct rpc_task;
struct nlmsvc_binding {
__be32 (*fopen)(struct svc_rqst *,
struct nfs_fh *,
- struct file **);
+ struct file **,
+ int mode);
void (*fclose)(struct file *);
};
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index 666f5f310a04..70ce419e2709 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -10,6 +10,8 @@
#ifndef LINUX_LOCKD_LOCKD_H
#define LINUX_LOCKD_LOCKD_H
+/* XXX: a lot of this should really be under fs/lockd. */
+
#include <linux/in.h>
#include <linux/in6.h>
#include <net/ipv6.h>
@@ -154,7 +156,8 @@ struct nlm_rqst {
struct nlm_file {
struct hlist_node f_list; /* linked list */
struct nfs_fh f_handle; /* NFS file handle */
- struct file * f_file; /* VFS file pointer */
+ struct file * f_file[2]; /* VFS file pointers,
+ indexed by O_ flags */
struct nlm_share * f_shares; /* DOS shares */
struct list_head f_blocks; /* blocked locks */
unsigned int f_locks; /* guesstimate # of locks */
@@ -267,6 +270,7 @@ typedef int (*nlm_host_match_fn_t)(void *cur, struct nlm_host *ref);
/*
* Server-side lock handling
*/
+int lock_to_openmode(struct file_lock *);
__be32 nlmsvc_lock(struct svc_rqst *, struct nlm_file *,
struct nlm_host *, struct nlm_lock *, int,
struct nlm_cookie *, int);
@@ -286,8 +290,9 @@ void nlmsvc_locks_init_private(struct file_lock *, struct nlm_host *, pid_t);
* File handling for the server personality
*/
__be32 nlm_lookup_file(struct svc_rqst *, struct nlm_file **,
- struct nfs_fh *);
+ struct nlm_lock *);
void nlm_release_file(struct nlm_file *);
+void nlmsvc_put_lockowner(struct nlm_lockowner *);
void nlmsvc_release_lockowner(struct nlm_lock *);
void nlmsvc_mark_resources(struct net *);
void nlmsvc_free_host_resources(struct nlm_host *);
@@ -299,9 +304,15 @@ void nlmsvc_invalidate_all(void);
int nlmsvc_unlock_all_by_sb(struct super_block *sb);
int nlmsvc_unlock_all_by_ip(struct sockaddr *server_addr);
+static inline struct file *nlmsvc_file_file(struct nlm_file *file)
+{
+ return file->f_file[O_RDONLY] ?
+ file->f_file[O_RDONLY] : file->f_file[O_WRONLY];
+}
+
static inline struct inode *nlmsvc_file_inode(struct nlm_file *file)
{
- return locks_inode(file->f_file);
+ return locks_inode(nlmsvc_file_file(file));
}
static inline int __nlm_privileged_request4(const struct sockaddr *sap)
diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
index 7ab9f264313f..67e4a2c5500b 100644
--- a/include/linux/lockd/xdr.h
+++ b/include/linux/lockd/xdr.h
@@ -41,6 +41,8 @@ struct nlm_lock {
struct nfs_fh fh;
struct xdr_netobj oh;
u32 svid;
+ u64 lock_start;
+ u64 lock_len;
struct file_lock fl;
};
@@ -96,24 +98,19 @@ struct nlm_reboot {
*/
#define NLMSVC_XDRSIZE sizeof(struct nlm_args)
-int nlmsvc_decode_testargs(struct svc_rqst *, __be32 *);
-int nlmsvc_encode_testres(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_lockargs(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_cancargs(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_unlockargs(struct svc_rqst *, __be32 *);
-int nlmsvc_encode_res(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_res(struct svc_rqst *, __be32 *);
-int nlmsvc_encode_void(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_void(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_shareargs(struct svc_rqst *, __be32 *);
-int nlmsvc_encode_shareres(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_notify(struct svc_rqst *, __be32 *);
-int nlmsvc_decode_reboot(struct svc_rqst *, __be32 *);
-/*
-int nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
- */
+bool nlmsvc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+
+bool nlmsvc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlmsvc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
#endif /* LOCKD_XDR_H */
diff --git a/include/linux/lockd/xdr4.h b/include/linux/lockd/xdr4.h
index e709fe5924f2..72831e35dca3 100644
--- a/include/linux/lockd/xdr4.h
+++ b/include/linux/lockd/xdr4.h
@@ -22,27 +22,22 @@
#define nlm4_fbig cpu_to_be32(NLM_FBIG)
#define nlm4_failed cpu_to_be32(NLM_FAILED)
+void nlm4svc_set_file_lock_range(struct file_lock *fl, u64 off, u64 len);
+bool nlm4svc_decode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_testargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_lockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_cancargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_unlockargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_reboot(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_shareargs(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_decode_notify(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_encode_testres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_encode_res(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_encode_void(struct svc_rqst *rqstp, struct xdr_stream *xdr);
+bool nlm4svc_encode_shareres(struct svc_rqst *rqstp, struct xdr_stream *xdr);
-int nlm4svc_decode_testargs(struct svc_rqst *, __be32 *);
-int nlm4svc_encode_testres(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_lockargs(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_cancargs(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_unlockargs(struct svc_rqst *, __be32 *);
-int nlm4svc_encode_res(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_res(struct svc_rqst *, __be32 *);
-int nlm4svc_encode_void(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_void(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_shareargs(struct svc_rqst *, __be32 *);
-int nlm4svc_encode_shareres(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_notify(struct svc_rqst *, __be32 *);
-int nlm4svc_decode_reboot(struct svc_rqst *, __be32 *);
-/*
-int nlmclt_encode_testargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_lockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_cancargs(struct rpc_rqst *, u32 *, struct nlm_args *);
-int nlmclt_encode_unlockargs(struct rpc_rqst *, u32 *, struct nlm_args *);
- */
extern const struct rpc_version nlm_version4;
#endif /* LOCKD_XDR4_H */
diff --git a/include/linux/module.h b/include/linux/module.h
index 6264617bab4d..a55a40c28568 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -582,7 +582,7 @@ static inline bool within_module(unsigned long addr, const struct module *mod)
return within_module_init(addr, mod) || within_module_core(addr, mod);
}
-/* Search for module by name: must hold module_mutex. */
+/* Search for module by name: must be in a RCU-sched critical section. */
struct module *find_module(const char *name);
struct symsearch {
@@ -604,13 +604,9 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
/* Look for this name: can be of form module:name. */
unsigned long module_kallsyms_lookup_name(const char *name);
-int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
- struct module *, unsigned long),
- void *data);
-
-extern void __noreturn __module_put_and_exit(struct module *mod,
+extern void __noreturn __module_put_and_kthread_exit(struct module *mod,
long code);
-#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
+#define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code)
#ifdef CONFIG_MODULE_UNLOAD
int module_refcount(struct module *mod);
@@ -791,14 +787,6 @@ static inline unsigned long module_kallsyms_lookup_name(const char *name)
return 0;
}
-static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
- struct module *,
- unsigned long),
- void *data)
-{
- return 0;
-}
-
static inline int register_module_notifier(struct notifier_block *nb)
{
/* no events will happen anyway, so this can always succeed */
@@ -810,7 +798,7 @@ static inline int unregister_module_notifier(struct notifier_block *nb)
return 0;
}
-#define module_put_and_exit(code) do_exit(code)
+#define module_put_and_kthread_exit(code) kthread_exit(code)
static inline void print_modules(void)
{
@@ -887,4 +875,8 @@ static inline bool module_sig_ok(struct module *module)
}
#endif /* CONFIG_MODULE_SIG */
+int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *, unsigned long),
+ void *data);
+
#endif /* _LINUX_MODULE_H */
diff --git a/include/linux/nfs.h b/include/linux/nfs.h
index 0dc7ad38a0da..b06375e88e58 100644
--- a/include/linux/nfs.h
+++ b/include/linux/nfs.h
@@ -36,14 +36,6 @@ static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *sourc
memcpy(target->data, source->data, source->size);
}
-
-/*
- * This is really a general kernel constant, but since nothing like
- * this is defined in the kernel headers, I have to do it here.
- */
-#define NFS_OFFSET_MAX ((__s64)((~(__u64)0) >> 1))
-
-
enum nfs3_stable_how {
NFS_UNSTABLE = 0,
NFS_DATA_SYNC = 1,
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 9dc7eeac924f..ea88d0f462c9 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -385,13 +385,6 @@ enum lock_type4 {
NFS4_WRITEW_LT = 4
};
-enum change_attr_type4 {
- NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR = 0,
- NFS4_CHANGE_TYPE_IS_VERSION_COUNTER = 1,
- NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS = 2,
- NFS4_CHANGE_TYPE_IS_TIME_METADATA = 3,
- NFS4_CHANGE_TYPE_IS_UNDEFINED = 4
-};
/* Mandatory Attributes */
#define FATTR4_WORD0_SUPPORTED_ATTRS (1UL << 0)
@@ -459,7 +452,6 @@ enum change_attr_type4 {
#define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1)
#define FATTR4_WORD2_MDSTHRESHOLD (1UL << 4)
#define FATTR4_WORD2_CLONE_BLKSIZE (1UL << 13)
-#define FATTR4_WORD2_CHANGE_ATTR_TYPE (1UL << 15)
#define FATTR4_WORD2_SECURITY_LABEL (1UL << 16)
#define FATTR4_WORD2_MODE_UMASK (1UL << 17)
#define FATTR4_WORD2_XATTR_SUPPORT (1UL << 18)
@@ -725,4 +717,17 @@ enum nfs4_setxattr_options {
SETXATTR4_CREATE = 1,
SETXATTR4_REPLACE = 2,
};
+
+enum {
+ RCA4_TYPE_MASK_RDATA_DLG = 0,
+ RCA4_TYPE_MASK_WDATA_DLG = 1,
+ RCA4_TYPE_MASK_DIR_DLG = 2,
+ RCA4_TYPE_MASK_FILE_LAYOUT = 3,
+ RCA4_TYPE_MASK_BLK_LAYOUT = 4,
+ RCA4_TYPE_MASK_OBJ_LAYOUT_MIN = 8,
+ RCA4_TYPE_MASK_OBJ_LAYOUT_MAX = 9,
+ RCA4_TYPE_MASK_OTHER_LAYOUT_MIN = 12,
+ RCA4_TYPE_MASK_OTHER_LAYOUT_MAX = 15,
+};
+
#endif
diff --git a/include/linux/nfs_ssc.h b/include/linux/nfs_ssc.h
index f5ba0fbff72f..22265b1ff080 100644
--- a/include/linux/nfs_ssc.h
+++ b/include/linux/nfs_ssc.h
@@ -8,6 +8,7 @@
*/
#include <linux/nfs_fs.h>
+#include <linux/sunrpc/svc.h>
extern struct nfs_ssc_client_ops_tbl nfs_ssc_client_tbl;
@@ -54,6 +55,19 @@ static inline void nfs42_ssc_close(struct file *filep)
}
#endif
+struct nfsd4_ssc_umount_item {
+ struct list_head nsui_list;
+ bool nsui_busy;
+ /*
+ * nsui_refcnt inited to 2, 1 on list and 1 for consumer. Entry
+ * is removed when refcnt drops to 1 and nsui_expire expires.
+ */
+ refcount_t nsui_refcnt;
+ unsigned long nsui_expire;
+ struct vfsmount *nsui_vfsmount;
+ char nsui_ipaddr[RPC_MAX_ADDRBUFLEN + 1];
+};
+
/*
* NFS_FS
*/
diff --git a/include/linux/nfsacl.h b/include/linux/nfsacl.h
index 103d44695323..8e76a79cdc6a 100644
--- a/include/linux/nfsacl.h
+++ b/include/linux/nfsacl.h
@@ -38,5 +38,11 @@ nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
extern int
nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
struct posix_acl **pacl);
+extern bool
+nfs_stream_decode_acl(struct xdr_stream *xdr, unsigned int *aclcnt,
+ struct posix_acl **pacl);
+extern bool
+nfs_stream_encode_acl(struct xdr_stream *xdr, struct inode *inode,
+ struct posix_acl *acl, int encode_entries, int typeflag);
#endif /* __LINUX_NFSACL_H */
diff --git a/include/linux/pid.h b/include/linux/pid.h
index fa10acb8d6a4..af308e15f174 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -78,6 +78,7 @@ struct file;
extern struct pid *pidfd_pid(const struct file *file);
struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);
+int pidfd_create(struct pid *pid, unsigned int flags);
static inline struct pid *get_pid(struct pid *pid)
{
diff --git a/include/linux/sched/user.h b/include/linux/sched/user.h
index a8ec3b6093fc..3632c5d6ec55 100644
--- a/include/linux/sched/user.h
+++ b/include/linux/sched/user.h
@@ -14,9 +14,6 @@ struct user_struct {
refcount_t __count; /* reference count */
atomic_t processes; /* How many processes does this user have? */
atomic_t sigpending; /* How many pending signals does this user have? */
-#ifdef CONFIG_FANOTIFY
- atomic_t fanotify_listeners;
-#endif
#ifdef CONFIG_EPOLL
atomic_long_t epoll_watches; /* The number of file descriptors currently watched */
#endif
diff --git a/include/linux/sunrpc/msg_prot.h b/include/linux/sunrpc/msg_prot.h
index 43f854487539..938c2bf29db8 100644
--- a/include/linux/sunrpc/msg_prot.h
+++ b/include/linux/sunrpc/msg_prot.h
@@ -10,9 +10,6 @@
#define RPC_VERSION 2
-/* size of an XDR encoding unit in bytes, i.e. 32bit */
-#define XDR_UNIT (4)
-
/* spec defines authentication flavor as an unsigned 32 bit integer */
typedef u32 rpc_authflavor_t;
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 386628b36bc7..1cf7a7799cc0 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -19,6 +19,7 @@
#include <linux/sunrpc/svcauth.h>
#include <linux/wait.h>
#include <linux/mm.h>
+#include <linux/pagevec.h>
/* statistics for svc_pool structures */
struct svc_pool_stats {
@@ -51,25 +52,6 @@ struct svc_pool {
unsigned long sp_flags;
} ____cacheline_aligned_in_smp;
-struct svc_serv;
-
-struct svc_serv_ops {
- /* Callback to use when last thread exits. */
- void (*svo_shutdown)(struct svc_serv *, struct net *);
-
- /* function for service threads to run */
- int (*svo_function)(void *);
-
- /* queue up a transport for servicing */
- void (*svo_enqueue_xprt)(struct svc_xprt *);
-
- /* set up thread (or whatever) execution context */
- int (*svo_setup)(struct svc_serv *, struct svc_pool *, int);
-
- /* optional module to count when adding threads (pooled svcs only) */
- struct module *svo_module;
-};
-
/*
* RPC service.
*
@@ -84,6 +66,7 @@ struct svc_serv {
struct svc_program * sv_program; /* RPC program */
struct svc_stat * sv_stats; /* RPC statistics */
spinlock_t sv_lock;
+ struct kref sv_refcnt;
unsigned int sv_nrthreads; /* # of server threads */
unsigned int sv_maxconn; /* max connections allowed or
* '0' causing max to be based
@@ -101,7 +84,8 @@ struct svc_serv {
unsigned int sv_nrpools; /* number of thread pools */
struct svc_pool * sv_pools; /* array of thread pools */
- const struct svc_serv_ops *sv_ops; /* server operations */
+ int (*sv_threadfn)(void *data);
+
#if defined(CONFIG_SUNRPC_BACKCHANNEL)
struct list_head sv_cb_list; /* queue for callback requests
* that arrive over the same
@@ -113,15 +97,30 @@ struct svc_serv {
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
};
-/*
- * We use sv_nrthreads as a reference count. svc_destroy() drops
- * this refcount, so we need to bump it up around operations that
- * change the number of threads. Horrible, but there it is.
- * Should be called with the "service mutex" held.
+/**
+ * svc_get() - increment reference count on a SUNRPC serv
+ * @serv: the svc_serv to have count incremented
+ *
+ * Returns: the svc_serv that was passed in.
*/
-static inline void svc_get(struct svc_serv *serv)
+static inline struct svc_serv *svc_get(struct svc_serv *serv)
{
- serv->sv_nrthreads++;
+ kref_get(&serv->sv_refcnt);
+ return serv;
+}
+
+void svc_destroy(struct kref *);
+
+/**
+ * svc_put - decrement reference count on a SUNRPC serv
+ * @serv: the svc_serv to have count decremented
+ *
+ * When the reference count reaches zero, svc_destroy()
+ * is called to clean up and free the serv.
+ */
+static inline void svc_put(struct svc_serv *serv)
+{
+ kref_put(&serv->sv_refcnt, svc_destroy);
}
/*
@@ -247,12 +246,16 @@ struct svc_rqst {
size_t rq_xprt_hlen; /* xprt header len */
struct xdr_buf rq_arg;
+ struct xdr_stream rq_arg_stream;
+ struct xdr_stream rq_res_stream;
+ struct page *rq_scratch_page;
struct xdr_buf rq_res;
struct page *rq_pages[RPCSVC_MAXPAGES + 1];
struct page * *rq_respages; /* points into rq_pages */
struct page * *rq_next_page; /* next reply page to use */
struct page * *rq_page_end; /* one past the last page */
+ struct pagevec rq_pvec;
struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
struct bio_vec rq_bvec[RPCSVC_MAXPAGES];
@@ -272,13 +275,13 @@ struct svc_rqst {
#define RQ_VICTIM (5) /* about to be shut down */
#define RQ_BUSY (6) /* request is busy */
#define RQ_DATA (7) /* request has data */
-#define RQ_AUTHERR (8) /* Request status is auth error */
unsigned long rq_flags; /* flags field */
ktime_t rq_qtime; /* enqueue time */
void * rq_argp; /* decoded arguments */
void * rq_resp; /* xdr'd results */
void * rq_auth_data; /* flavor-specific data */
+ __be32 rq_auth_stat; /* authentication status */
int rq_auth_slack; /* extra space xdr code
* should leave in head
* for krb5i, krb5p.
@@ -452,40 +455,21 @@ struct svc_procedure {
/* process the request: */
__be32 (*pc_func)(struct svc_rqst *);
/* XDR decode args: */
- int (*pc_decode)(struct svc_rqst *, __be32 *data);
+ bool (*pc_decode)(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr);
/* XDR encode result: */
- int (*pc_encode)(struct svc_rqst *, __be32 *data);
+ bool (*pc_encode)(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr);
/* XDR free result: */
void (*pc_release)(struct svc_rqst *);
unsigned int pc_argsize; /* argument struct size */
+ unsigned int pc_argzero; /* how much of argument to clear */
unsigned int pc_ressize; /* result struct size */
unsigned int pc_cachetype; /* cache info (NFS) */
unsigned int pc_xdrressize; /* maximum size of XDR reply */
+ const char * pc_name; /* for display */
};
-/*
- * Mode for mapping cpus to pools.
- */
-enum {
- SVC_POOL_AUTO = -1, /* choose one of the others */
- SVC_POOL_GLOBAL, /* no mapping, just a single global pool
- * (legacy & UP mode) */
- SVC_POOL_PERCPU, /* one pool per cpu */
- SVC_POOL_PERNODE /* one pool per numa node */
-};
-
-struct svc_pool_map {
- int count; /* How many svc_servs use us */
- int mode; /* Note: int not enum to avoid
- * warnings about "enumeration value
- * not handled in switch" */
- unsigned int npools;
- unsigned int *pool_to; /* maps pool id to cpu or node */
- unsigned int *to_pool; /* maps cpu or node to pool id */
-};
-
-extern struct svc_pool_map svc_pool_map;
-
/*
* Function prototypes.
*/
@@ -493,22 +477,17 @@ int svc_rpcb_setup(struct svc_serv *serv, struct net *net);
void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net);
int svc_bind(struct svc_serv *serv, struct net *net);
struct svc_serv *svc_create(struct svc_program *, unsigned int,
- const struct svc_serv_ops *);
+ int (*threadfn)(void *data));
struct svc_rqst *svc_rqst_alloc(struct svc_serv *serv,
struct svc_pool *pool, int node);
-struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
- struct svc_pool *pool, int node);
+void svc_rqst_replace_page(struct svc_rqst *rqstp,
+ struct page *page);
void svc_rqst_free(struct svc_rqst *);
void svc_exit_thread(struct svc_rqst *);
-unsigned int svc_pool_map_get(void);
-void svc_pool_map_put(void);
struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
- const struct svc_serv_ops *);
+ int (*threadfn)(void *data));
int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
-int svc_set_num_threads_sync(struct svc_serv *, struct svc_pool *, int);
int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
-void svc_destroy(struct svc_serv *);
-void svc_shutdown_net(struct svc_serv *, struct net *);
int svc_process(struct svc_rqst *);
int bc_svc_process(struct svc_serv *, struct rpc_rqst *,
struct svc_rqst *);
@@ -519,16 +498,14 @@ void svc_wake_up(struct svc_serv *);
void svc_reserve(struct svc_rqst *rqstp, int space);
struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu);
char * svc_print_addr(struct svc_rqst *, char *, size_t);
-int svc_encode_read_payload(struct svc_rqst *rqstp,
- unsigned int offset,
- unsigned int length);
+int svc_encode_result_payload(struct svc_rqst *rqstp,
+ unsigned int offset,
+ unsigned int length);
unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
- struct page **pages,
- struct kvec *first, size_t total);
+ struct xdr_buf *payload);
char *svc_fill_symlink_pathname(struct svc_rqst *rqstp,
struct kvec *first, void *p,
size_t total);
-__be32 svc_return_autherr(struct svc_rqst *rqstp, __be32 auth_err);
__be32 svc_generic_init_request(struct svc_rqst *rqstp,
const struct svc_program *progp,
struct svc_process_info *procinfo);
@@ -557,4 +534,42 @@ static inline void svc_reserve_auth(struct svc_rqst *rqstp, int space)
svc_reserve(rqstp, space + rqstp->rq_auth_slack);
}
+/**
+ * svcxdr_init_decode - Prepare an xdr_stream for svc Call decoding
+ * @rqstp: controlling server RPC transaction context
+ *
+ */
+static inline void svcxdr_init_decode(struct svc_rqst *rqstp)
+{
+ struct xdr_stream *xdr = &rqstp->rq_arg_stream;
+ struct kvec *argv = rqstp->rq_arg.head;
+
+ xdr_init_decode(xdr, &rqstp->rq_arg, argv->iov_base, NULL);
+ xdr_set_scratch_page(xdr, rqstp->rq_scratch_page);
+}
+
+/**
+ * svcxdr_init_encode - Prepare an xdr_stream for svc Reply encoding
+ * @rqstp: controlling server RPC transaction context
+ *
+ */
+static inline void svcxdr_init_encode(struct svc_rqst *rqstp)
+{
+ struct xdr_stream *xdr = &rqstp->rq_res_stream;
+ struct xdr_buf *buf = &rqstp->rq_res;
+ struct kvec *resv = buf->head;
+
+ xdr_reset_scratch_buffer(xdr);
+
+ xdr->buf = buf;
+ xdr->iov = resv;
+ xdr->p = resv->iov_base + resv->iov_len;
+ xdr->end = resv->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
+ buf->len = resv->iov_len;
+ xdr->page_ptr = buf->pages - 1;
+ buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages);
+ buf->buflen -= rqstp->rq_auth_slack;
+ xdr->rqst = NULL;
+}
+
#endif /* SUNRPC_SVC_H */
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 9dc3a3b88391..2b870a3f391b 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -207,8 +207,8 @@ extern void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_recv_ctxt *rctxt,
int status);
extern int svc_rdma_sendto(struct svc_rqst *);
-extern int svc_rdma_read_payload(struct svc_rqst *rqstp, unsigned int offset,
- unsigned int length);
+extern int svc_rdma_result_payload(struct svc_rqst *rqstp, unsigned int offset,
+ unsigned int length);
/* svc_rdma_transport.c */
extern struct svc_xprt_class svc_rdma_class;
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h
index aca35ab5cff2..dbffb92511ef 100644
--- a/include/linux/sunrpc/svc_xprt.h
+++ b/include/linux/sunrpc/svc_xprt.h
@@ -21,8 +21,8 @@ struct svc_xprt_ops {
int (*xpo_has_wspace)(struct svc_xprt *);
int (*xpo_recvfrom)(struct svc_rqst *);
int (*xpo_sendto)(struct svc_rqst *);
- int (*xpo_read_payload)(struct svc_rqst *, unsigned int,
- unsigned int);
+ int (*xpo_result_payload)(struct svc_rqst *, unsigned int,
+ unsigned int);
void (*xpo_release_rqst)(struct svc_rqst *);
void (*xpo_detach)(struct svc_xprt *);
void (*xpo_free)(struct svc_xprt *);
@@ -127,14 +127,16 @@ int svc_reg_xprt_class(struct svc_xprt_class *);
void svc_unreg_xprt_class(struct svc_xprt_class *);
void svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
struct svc_serv *);
-int svc_create_xprt(struct svc_serv *, const char *, struct net *,
- const int, const unsigned short, int,
- const struct cred *);
-void svc_xprt_do_enqueue(struct svc_xprt *xprt);
+int svc_xprt_create(struct svc_serv *serv, const char *xprt_name,
+ struct net *net, const int family,
+ const unsigned short port, int flags,
+ const struct cred *cred);
+void svc_xprt_destroy_all(struct svc_serv *serv, struct net *net);
+void svc_xprt_received(struct svc_xprt *xprt);
void svc_xprt_enqueue(struct svc_xprt *xprt);
void svc_xprt_put(struct svc_xprt *xprt);
void svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
-void svc_close_xprt(struct svc_xprt *xprt);
+void svc_xprt_close(struct svc_xprt *xprt);
int svc_port_is_privileged(struct sockaddr *sin);
int svc_print_xprts(char *buf, int maxlen);
struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
diff --git a/include/linux/sunrpc/svcauth.h b/include/linux/sunrpc/svcauth.h
index b0003866a249..6d9cc9080aca 100644
--- a/include/linux/sunrpc/svcauth.h
+++ b/include/linux/sunrpc/svcauth.h
@@ -127,7 +127,7 @@ struct auth_ops {
char * name;
struct module *owner;
int flavour;
- int (*accept)(struct svc_rqst *rq, __be32 *authp);
+ int (*accept)(struct svc_rqst *rq);
int (*release)(struct svc_rqst *rq);
void (*domain_release)(struct auth_domain *);
int (*set_client)(struct svc_rqst *rq);
@@ -149,7 +149,7 @@ struct auth_ops {
struct svc_xprt;
-extern int svc_authenticate(struct svc_rqst *rqstp, __be32 *authp);
+extern int svc_authenticate(struct svc_rqst *rqstp);
extern int svc_authorise(struct svc_rqst *rqstp);
extern int svc_set_client(struct svc_rqst *rqstp);
extern int svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops);
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h
index b7ac7fe68306..a366d3eb0531 100644
--- a/include/linux/sunrpc/svcsock.h
+++ b/include/linux/sunrpc/svcsock.h
@@ -57,10 +57,9 @@ int svc_recv(struct svc_rqst *, long);
int svc_send(struct svc_rqst *);
void svc_drop(struct svc_rqst *);
void svc_sock_update_bufs(struct svc_serv *serv);
-bool svc_alien_sock(struct net *net, int fd);
-int svc_addsock(struct svc_serv *serv, const int fd,
- char *name_return, const size_t len,
- const struct cred *cred);
+int svc_addsock(struct svc_serv *serv, struct net *net,
+ const int fd, char *name_return, const size_t len,
+ const struct cred *cred);
void svc_init_xprt_sock(void);
void svc_cleanup_xprt_sock(void);
struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 6d9d1520612b..c1c50eaae472 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -19,6 +19,13 @@
struct bio_vec;
struct rpc_rqst;
+/*
+ * Size of an XDR encoding unit in bytes, i.e. 32 bits,
+ * as defined in Section 3 of RFC 4506. All encoded
+ * XDR data items are aligned on a boundary of 32 bits.
+ */
+#define XDR_UNIT sizeof(__be32)
+
/*
* Buffer adjustment
*/
@@ -232,10 +239,12 @@ typedef int (*kxdrdproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf,
__be32 *p, struct rpc_rqst *rqst);
+extern void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
+ struct page **pages, struct rpc_rqst *rqst);
extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes);
extern int xdr_reserve_space_vec(struct xdr_stream *xdr, struct kvec *vec,
size_t nbytes);
-extern void xdr_commit_encode(struct xdr_stream *xdr);
+extern void __xdr_commit_encode(struct xdr_stream *xdr);
extern void xdr_truncate_encode(struct xdr_stream *xdr, size_t len);
extern int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen);
extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages,
@@ -246,13 +255,71 @@ extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf,
__be32 *p, struct rpc_rqst *rqst);
extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
struct page **pages, unsigned int len);
-extern void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen);
extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes);
extern unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data);
extern uint64_t xdr_align_data(struct xdr_stream *, uint64_t, uint32_t);
extern uint64_t xdr_expand_hole(struct xdr_stream *, uint64_t, uint64_t);
+extern bool xdr_stream_subsegment(struct xdr_stream *xdr, struct xdr_buf *subbuf,
+ unsigned int len);
+
+/**
+ * xdr_set_scratch_buffer - Attach a scratch buffer for decoding data.
+ * @xdr: pointer to xdr_stream struct
+ * @buf: pointer to an empty buffer
+ * @buflen: size of 'buf'
+ *
+ * The scratch buffer is used when decoding from an array of pages.
+ * If an xdr_inline_decode() call spans across page boundaries, then
+ * we copy the data into the scratch buffer in order to allow linear
+ * access.
+ */
+static inline void
+xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen)
+{
+ xdr->scratch.iov_base = buf;
+ xdr->scratch.iov_len = buflen;
+}
+
+/**
+ * xdr_set_scratch_page - Attach a scratch buffer for decoding data
+ * @xdr: pointer to xdr_stream struct
+ * @page: an anonymous page
+ *
+ * See xdr_set_scratch_buffer().
+ */
+static inline void
+xdr_set_scratch_page(struct xdr_stream *xdr, struct page *page)
+{
+ xdr_set_scratch_buffer(xdr, page_address(page), PAGE_SIZE);
+}
+
+/**
+ * xdr_reset_scratch_buffer - Clear scratch buffer information
+ * @xdr: pointer to xdr_stream struct
+ *
+ * See xdr_set_scratch_buffer().
+ */
+static inline void
+xdr_reset_scratch_buffer(struct xdr_stream *xdr)
+{
+ xdr_set_scratch_buffer(xdr, NULL, 0);
+}
+
+/**
+ * xdr_commit_encode - Ensure all data is written to xdr->buf
+ * @xdr: pointer to xdr_stream
+ *
+ * Handle encoding across page boundaries by giving the caller a
+ * temporary location to write to, then later copying the data into
+ * place. __xdr_commit_encode() does that copying.
+ */
+static inline void xdr_commit_encode(struct xdr_stream *xdr)
+{
+ if (unlikely(xdr->scratch.iov_len))
+ __xdr_commit_encode(xdr);
+}
/**
* xdr_stream_remaining - Return the number of bytes remaining in the stream
@@ -285,7 +352,7 @@ ssize_t xdr_stream_decode_string_dup(struct xdr_stream *xdr, char **str,
static inline size_t
xdr_align_size(size_t n)
{
- const size_t mask = sizeof(__u32) - 1;
+ const size_t mask = XDR_UNIT - 1;
return (n + mask) & ~mask;
}
@@ -315,7 +382,7 @@ static inline size_t xdr_pad_size(size_t n)
*/
static inline ssize_t xdr_stream_encode_item_present(struct xdr_stream *xdr)
{
- const size_t len = sizeof(__be32);
+ const size_t len = XDR_UNIT;
__be32 *p = xdr_reserve_space(xdr, len);
if (unlikely(!p))
@@ -334,7 +401,7 @@ static inline ssize_t xdr_stream_encode_item_present(struct xdr_stream *xdr)
*/
static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr)
{
- const size_t len = sizeof(__be32);
+ const size_t len = XDR_UNIT;
__be32 *p = xdr_reserve_space(xdr, len);
if (unlikely(!p))
@@ -343,6 +410,40 @@ static inline int xdr_stream_encode_item_absent(struct xdr_stream *xdr)
return len;
}
+/**
+ * xdr_encode_bool - Encode a boolean item
+ * @p: address in a buffer into which to encode
+ * @n: boolean value to encode
+ *
+ * Return value:
+ * Address of item following the encoded boolean
+ */
+static inline __be32 *xdr_encode_bool(__be32 *p, u32 n)
+{
+ *p++ = n ? xdr_one : xdr_zero;
+ return p;
+}
+
+/**
+ * xdr_stream_encode_bool - Encode a boolean item
+ * @xdr: pointer to xdr_stream
+ * @n: boolean value to encode
+ *
+ * Return values:
+ * On success, returns length in bytes of XDR buffer consumed
+ * %-EMSGSIZE on XDR buffer overflow
+ */
+static inline int xdr_stream_encode_bool(struct xdr_stream *xdr, __u32 n)
+{
+ const size_t len = XDR_UNIT;
+ __be32 *p = xdr_reserve_space(xdr, len);
+
+ if (unlikely(!p))
+ return -EMSGSIZE;
+ xdr_encode_bool(p, n);
+ return len;
+}
+
/**
* xdr_stream_encode_u32 - Encode a 32-bit integer
* @xdr: pointer to xdr_stream
@@ -504,6 +605,27 @@ static inline bool xdr_item_is_present(const __be32 *p)
return *p != xdr_zero;
}
+/**
+ * xdr_stream_decode_bool - Decode a boolean
+ * @xdr: pointer to xdr_stream
+ * @ptr: pointer to a u32 in which to store the result
+ *
+ * Return values:
+ * %0 on success
+ * %-EBADMSG on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_decode_bool(struct xdr_stream *xdr, __u32 *ptr)
+{
+ const size_t count = sizeof(*ptr);
+ __be32 *p = xdr_inline_decode(xdr, count);
+
+ if (unlikely(!p))
+ return -EBADMSG;
+ *ptr = (*p != xdr_zero);
+ return 0;
+}
+
/**
* xdr_stream_decode_u32 - Decode a 32-bit integer
* @xdr: pointer to xdr_stream
@@ -525,6 +647,27 @@ xdr_stream_decode_u32(struct xdr_stream *xdr, __u32 *ptr)
return 0;
}
+/**
+ * xdr_stream_decode_u64 - Decode a 64-bit integer
+ * @xdr: pointer to xdr_stream
+ * @ptr: location to store 64-bit integer
+ *
+ * Return values:
+ * %0 on success
+ * %-EBADMSG on XDR buffer overflow
+ */
+static inline ssize_t
+xdr_stream_decode_u64(struct xdr_stream *xdr, __u64 *ptr)
+{
+ const size_t count = sizeof(*ptr);
+ __be32 *p = xdr_inline_decode(xdr, count);
+
+ if (unlikely(!p))
+ return -EBADMSG;
+ xdr_decode_hyper(p, ptr);
+ return 0;
+}
+
/**
* xdr_stream_decode_opaque_fixed - Decode fixed length opaque xdr data
* @xdr: pointer to xdr_stream
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 17a24e1180da..1ea422b1a9f1 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -1320,18 +1320,6 @@ static inline long ksys_ftruncate(unsigned int fd, loff_t length)
return do_sys_ftruncate(fd, length, 1);
}
-extern int __close_fd(struct files_struct *files, unsigned int fd);
-
-/*
- * In contrast to sys_close(), this stub does not check whether the syscall
- * should or should not be restarted, but returns the raw error codes from
- * __close_fd().
- */
-static inline int ksys_close(unsigned int fd)
-{
- return __close_fd(current->files, fd);
-}
-
extern long do_sys_truncate(const char __user *pathname, loff_t length);
static inline long ksys_truncate(const char __user *pathname, loff_t length)
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index c202a72e1690..47cf70c8eb93 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -55,6 +55,8 @@ typedef int proc_handler(struct ctl_table *ctl, int write, void *buffer,
size_t *lenp, loff_t *ppos);
int proc_dostring(struct ctl_table *, int, void *, size_t *, loff_t *);
+int proc_dobool(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos);
int proc_dointvec(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_douintvec(struct ctl_table *, int, void *, size_t *, loff_t *);
int proc_dointvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *);
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 7616c7bf4b24..0793951867ae 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -49,6 +49,10 @@ enum ucount_type {
#ifdef CONFIG_INOTIFY_USER
UCOUNT_INOTIFY_INSTANCES,
UCOUNT_INOTIFY_WATCHES,
+#endif
+#ifdef CONFIG_FANOTIFY
+ UCOUNT_FANOTIFY_GROUPS,
+ UCOUNT_FANOTIFY_MARKS,
#endif
UCOUNT_COUNTS,
};
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 8220369ee610..56e4a57d2538 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -394,6 +394,7 @@ DEFINE_RPC_RUNNING_EVENT(complete);
DEFINE_RPC_RUNNING_EVENT(timeout);
DEFINE_RPC_RUNNING_EVENT(signalled);
DEFINE_RPC_RUNNING_EVENT(end);
+DEFINE_RPC_RUNNING_EVENT(call_done);
DECLARE_EVENT_CLASS(rpc_task_queued,
@@ -1480,8 +1481,7 @@ DEFINE_SVCXDRBUF_EVENT(sendto);
svc_rqst_flag(SPLICE_OK) \
svc_rqst_flag(VICTIM) \
svc_rqst_flag(BUSY) \
- svc_rqst_flag(DATA) \
- svc_rqst_flag_end(AUTHERR)
+ svc_rqst_flag_end(DATA)
#undef svc_rqst_flag
#undef svc_rqst_flag_end
@@ -1547,9 +1547,9 @@ TRACE_DEFINE_ENUM(SVC_COMPLETE);
{ SVC_COMPLETE, "SVC_COMPLETE" })
TRACE_EVENT(svc_authenticate,
- TP_PROTO(const struct svc_rqst *rqst, int auth_res, __be32 auth_stat),
+ TP_PROTO(const struct svc_rqst *rqst, int auth_res),
- TP_ARGS(rqst, auth_res, auth_stat),
+ TP_ARGS(rqst, auth_res),
TP_STRUCT__entry(
__field(u32, xid)
@@ -1560,7 +1560,7 @@ TRACE_EVENT(svc_authenticate,
TP_fast_assign(
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->svc_status = auth_res;
- __entry->auth_stat = be32_to_cpu(auth_stat);
+ __entry->auth_stat = be32_to_cpu(rqst->rq_auth_stat);
),
TP_printk("xid=0x%08x auth_res=%s auth_stat=%s",
@@ -1578,6 +1578,7 @@ TRACE_EVENT(svc_process,
__field(u32, vers)
__field(u32, proc)
__string(service, name)
+ __string(procedure, rqst->rq_procinfo->pc_name)
__string(addr, rqst->rq_xprt ?
rqst->rq_xprt->xpt_remotebuf : "(null)")
),
@@ -1587,13 +1588,16 @@ TRACE_EVENT(svc_process,
__entry->vers = rqst->rq_vers;
__entry->proc = rqst->rq_proc;
__assign_str(service, name);
+ __assign_str(procedure, rqst->rq_procinfo->pc_name);
__assign_str(addr, rqst->rq_xprt ?
rqst->rq_xprt->xpt_remotebuf : "(null)");
),
- TP_printk("addr=%s xid=0x%08x service=%s vers=%u proc=%u",
+ TP_printk("addr=%s xid=0x%08x service=%s vers=%u proc=%s",
__get_str(addr), __entry->xid,
- __get_str(service), __entry->vers, __entry->proc)
+ __get_str(service), __entry->vers,
+ __get_str(procedure)
+ )
);
DECLARE_EVENT_CLASS(svc_rqst_event,
@@ -1752,6 +1756,7 @@ DECLARE_EVENT_CLASS(svc_xprt_event,
), \
TP_ARGS(xprt))
+DEFINE_SVC_XPRT_EVENT(received);
DEFINE_SVC_XPRT_EVENT(no_write_space);
DEFINE_SVC_XPRT_EVENT(close);
DEFINE_SVC_XPRT_EVENT(detach);
@@ -1849,6 +1854,7 @@ TRACE_EVENT(svc_stats_latency,
TP_STRUCT__entry(
__field(u32, xid)
__field(unsigned long, execute)
+ __string(procedure, rqst->rq_procinfo->pc_name)
__string(addr, rqst->rq_xprt->xpt_remotebuf)
),
@@ -1856,11 +1862,13 @@ TRACE_EVENT(svc_stats_latency,
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->execute = ktime_to_us(ktime_sub(ktime_get(),
rqst->rq_stime));
+ __assign_str(procedure, rqst->rq_procinfo->pc_name);
__assign_str(addr, rqst->rq_xprt->xpt_remotebuf);
),
- TP_printk("addr=%s xid=0x%08x execute-us=%lu",
- __get_str(addr), __entry->xid, __entry->execute)
+ TP_printk("addr=%s xid=0x%08x proc=%s execute-us=%lu",
+ __get_str(addr), __entry->xid, __get_str(procedure),
+ __entry->execute)
);
DECLARE_EVENT_CLASS(svc_deferred_event,
diff --git a/include/uapi/linux/fanotify.h b/include/uapi/linux/fanotify.h
index fbf9c5c7dd59..d8536d77fea1 100644
--- a/include/uapi/linux/fanotify.h
+++ b/include/uapi/linux/fanotify.h
@@ -20,6 +20,7 @@
#define FAN_OPEN_EXEC 0x00001000 /* File was opened for exec */
#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
+#define FAN_FS_ERROR 0x00008000 /* Filesystem error */
#define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
#define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
@@ -27,6 +28,8 @@
#define FAN_EVENT_ON_CHILD 0x08000000 /* Interested in child events */
+#define FAN_RENAME 0x10000000 /* File was renamed */
+
#define FAN_ONDIR 0x40000000 /* Event occurred against dir */
/* helper events */
@@ -51,13 +54,18 @@
#define FAN_ENABLE_AUDIT 0x00000040
/* Flags to determine fanotify event format */
+#define FAN_REPORT_PIDFD 0x00000080 /* Report pidfd for event->pid */
#define FAN_REPORT_TID 0x00000100 /* event->pid is thread id */
#define FAN_REPORT_FID 0x00000200 /* Report unique file id */
#define FAN_REPORT_DIR_FID 0x00000400 /* Report unique directory id */
#define FAN_REPORT_NAME 0x00000800 /* Report events with name */
+#define FAN_REPORT_TARGET_FID 0x00001000 /* Report dirent target id */
/* Convenience macro - FAN_REPORT_NAME requires FAN_REPORT_DIR_FID */
#define FAN_REPORT_DFID_NAME (FAN_REPORT_DIR_FID | FAN_REPORT_NAME)
+/* Convenience macro - FAN_REPORT_TARGET_FID requires all other FID flags */
+#define FAN_REPORT_DFID_NAME_TARGET (FAN_REPORT_DFID_NAME | \
+ FAN_REPORT_FID | FAN_REPORT_TARGET_FID)
/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
@@ -74,12 +82,21 @@
#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
#define FAN_MARK_FLUSH 0x00000080
/* FAN_MARK_FILESYSTEM is 0x00000100 */
+#define FAN_MARK_EVICTABLE 0x00000200
+/* This bit is mutually exclusive with FAN_MARK_IGNORED_MASK bit */
+#define FAN_MARK_IGNORE 0x00000400
/* These are NOT bitwise flags. Both bits can be used togther. */
#define FAN_MARK_INODE 0x00000000
#define FAN_MARK_MOUNT 0x00000010
#define FAN_MARK_FILESYSTEM 0x00000100
+/*
+ * Convenience macro - FAN_MARK_IGNORE requires FAN_MARK_IGNORED_SURV_MODIFY
+ * for non-inode mark types.
+ */
+#define FAN_MARK_IGNORE_SURV (FAN_MARK_IGNORE | FAN_MARK_IGNORED_SURV_MODIFY)
+
/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
FAN_MARK_REMOVE |\
@@ -123,6 +140,14 @@ struct fanotify_event_metadata {
#define FAN_EVENT_INFO_TYPE_FID 1
#define FAN_EVENT_INFO_TYPE_DFID_NAME 2
#define FAN_EVENT_INFO_TYPE_DFID 3
+#define FAN_EVENT_INFO_TYPE_PIDFD 4
+#define FAN_EVENT_INFO_TYPE_ERROR 5
+
+/* Special info types for FAN_RENAME */
+#define FAN_EVENT_INFO_TYPE_OLD_DFID_NAME 10
+/* Reserved for FAN_EVENT_INFO_TYPE_OLD_DFID 11 */
+#define FAN_EVENT_INFO_TYPE_NEW_DFID_NAME 12
+/* Reserved for FAN_EVENT_INFO_TYPE_NEW_DFID 13 */
/* Variable length info record following event metadata */
struct fanotify_event_info_header {
@@ -148,6 +173,21 @@ struct fanotify_event_info_fid {
unsigned char handle[0];
};
+/*
+ * This structure is used for info records of type FAN_EVENT_INFO_TYPE_PIDFD.
+ * It holds a pidfd for the pid that was responsible for generating an event.
+ */
+struct fanotify_event_info_pidfd {
+ struct fanotify_event_info_header hdr;
+ __s32 pidfd;
+};
+
+struct fanotify_event_info_error {
+ struct fanotify_event_info_header hdr;
+ __s32 error;
+ __u32 error_count;
+};
+
struct fanotify_response {
__s32 fd;
__u32 response;
@@ -160,6 +200,8 @@ struct fanotify_response {
/* No fd set in event */
#define FAN_NOFD -1
+#define FAN_NOPIDFD FAN_NOFD
+#define FAN_EPIDFD -2
/* Helper functions to deal with fanotify_event_metadata buffers */
#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
diff --git a/include/uapi/linux/nfs3.h b/include/uapi/linux/nfs3.h
index 37e4b34e6b43..c22ab77713bd 100644
--- a/include/uapi/linux/nfs3.h
+++ b/include/uapi/linux/nfs3.h
@@ -63,6 +63,12 @@ enum nfs3_ftype {
NF3BAD = 8
};
+enum nfs3_time_how {
+ DONT_CHANGE = 0,
+ SET_TO_SERVER_TIME = 1,
+ SET_TO_CLIENT_TIME = 2,
+};
+
struct nfs3_fh {
unsigned short size;
unsigned char data[NFS3_FHSIZE];
diff --git a/include/uapi/linux/nfsd/nfsfh.h b/include/uapi/linux/nfsd/nfsfh.h
deleted file mode 100644
index ff0ca88b1c8f..000000000000
--- a/include/uapi/linux/nfsd/nfsfh.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * This file describes the layout of the file handles as passed
- * over the wire.
- *
- * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@...ad.swb.de>
- */
-
-#ifndef _UAPI_LINUX_NFSD_FH_H
-#define _UAPI_LINUX_NFSD_FH_H
-
-#include <linux/types.h>
-#include <linux/nfs.h>
-#include <linux/nfs2.h>
-#include <linux/nfs3.h>
-#include <linux/nfs4.h>
-
-/*
- * This is the old "dentry style" Linux NFSv2 file handle.
- *
- * The xino and xdev fields are currently used to transport the
- * ino/dev of the exported inode.
- */
-struct nfs_fhbase_old {
- __u32 fb_dcookie; /* dentry cookie - always 0xfeebbaca */
- __u32 fb_ino; /* our inode number */
- __u32 fb_dirino; /* dir inode number, 0 for directories */
- __u32 fb_dev; /* our device */
- __u32 fb_xdev;
- __u32 fb_xino;
- __u32 fb_generation;
-};
-
-/*
- * This is the new flexible, extensible style NFSv2/v3/v4 file handle.
- * by Neil Brown <neilb@....unsw.edu.au> - March 2000
- *
- * The file handle starts with a sequence of four-byte words.
- * The first word contains a version number (1) and three descriptor bytes
- * that tell how the remaining 3 variable length fields should be handled.
- * These three bytes are auth_type, fsid_type and fileid_type.
- *
- * All four-byte values are in host-byte-order.
- *
- * The auth_type field is deprecated and must be set to 0.
- *
- * The fsid_type identifies how the filesystem (or export point) is
- * encoded.
- * Current values:
- * 0 - 4 byte device id (ms-2-bytes major, ls-2-bytes minor), 4byte inode number
- * NOTE: we cannot use the kdev_t device id value, because kdev_t.h
- * says we mustn't. We must break it up and reassemble.
- * 1 - 4 byte user specified identifier
- * 2 - 4 byte major, 4 byte minor, 4 byte inode number - DEPRECATED
- * 3 - 4 byte device id, encoded for user-space, 4 byte inode number
- * 4 - 4 byte inode number and 4 byte uuid
- * 5 - 8 byte uuid
- * 6 - 16 byte uuid
- * 7 - 8 byte inode number and 16 byte uuid
- *
- * The fileid_type identified how the file within the filesystem is encoded.
- * The values for this field are filesystem specific, exccept that
- * filesystems must not use the values '0' or '0xff'. 'See enum fid_type'
- * in include/linux/exportfs.h for currently registered values.
- */
-struct nfs_fhbase_new {
- __u8 fb_version; /* == 1, even => nfs_fhbase_old */
- __u8 fb_auth_type;
- __u8 fb_fsid_type;
- __u8 fb_fileid_type;
- __u32 fb_auth[1];
-/* __u32 fb_fsid[0]; floating */
-/* __u32 fb_fileid[0]; floating */
-};
-
-struct knfsd_fh {
- unsigned int fh_size; /* significant for NFSv3.
- * Points to the current size while building
- * a new file handle
- */
- union {
- struct nfs_fhbase_old fh_old;
- __u32 fh_pad[NFS4_FHSIZE/4];
- struct nfs_fhbase_new fh_new;
- } fh_base;
-};
-
-#define ofh_dcookie fh_base.fh_old.fb_dcookie
-#define ofh_ino fh_base.fh_old.fb_ino
-#define ofh_dirino fh_base.fh_old.fb_dirino
-#define ofh_dev fh_base.fh_old.fb_dev
-#define ofh_xdev fh_base.fh_old.fb_xdev
-#define ofh_xino fh_base.fh_old.fb_xino
-#define ofh_generation fh_base.fh_old.fb_generation
-
-#define fh_version fh_base.fh_new.fb_version
-#define fh_fsid_type fh_base.fh_new.fb_fsid_type
-#define fh_auth_type fh_base.fh_new.fb_auth_type
-#define fh_fileid_type fh_base.fh_new.fb_fileid_type
-#define fh_fsid fh_base.fh_new.fb_auth
-
-/* Do not use, provided for userspace compatiblity. */
-#define fh_auth fh_base.fh_new.fb_auth
-
-#endif /* _UAPI_LINUX_NFSD_FH_H */
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index b2ebacd2f309..691f90dd09d2 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -100,7 +100,7 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa
audit_update_mark(audit_mark, dentry->d_inode);
audit_mark->rule = krule;
- ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, true);
+ ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, 0);
if (ret < 0) {
audit_mark->path = NULL;
fsnotify_put_mark(&audit_mark->mark);
@@ -161,8 +161,7 @@ static int audit_mark_handle_event(struct fsnotify_mark *inode_mark, u32 mask,
audit_mark = container_of(inode_mark, struct audit_fsnotify_mark, mark);
- if (WARN_ON_ONCE(inode_mark->group != audit_fsnotify_group) ||
- WARN_ON_ONCE(!inode))
+ if (WARN_ON_ONCE(inode_mark->group != audit_fsnotify_group))
return 0;
if (mask & (FS_CREATE|FS_MOVED_TO|FS_DELETE|FS_MOVED_FROM)) {
@@ -183,7 +182,8 @@ static const struct fsnotify_ops audit_mark_fsnotify_ops = {
static int __init audit_fsnotify_init(void)
{
- audit_fsnotify_group = fsnotify_alloc_group(&audit_mark_fsnotify_ops);
+ audit_fsnotify_group = fsnotify_alloc_group(&audit_mark_fsnotify_ops,
+ FSNOTIFY_GROUP_DUPS);
if (IS_ERR(audit_fsnotify_group)) {
audit_fsnotify_group = NULL;
audit_panic("cannot create audit fsnotify group");
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 39241207ec04..0c35879bbf7c 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -1077,7 +1077,7 @@ static int __init audit_tree_init(void)
audit_tree_mark_cachep = KMEM_CACHE(audit_tree_mark, SLAB_PANIC);
- audit_tree_group = fsnotify_alloc_group(&audit_tree_ops);
+ audit_tree_group = fsnotify_alloc_group(&audit_tree_ops, 0);
if (IS_ERR(audit_tree_group))
audit_panic("cannot initialize fsnotify group for rectree watches");
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index edbeffee64b8..5cf22fe30149 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -472,8 +472,7 @@ static int audit_watch_handle_event(struct fsnotify_mark *inode_mark, u32 mask,
parent = container_of(inode_mark, struct audit_parent, mark);
- if (WARN_ON_ONCE(inode_mark->group != audit_watch_group) ||
- WARN_ON_ONCE(!inode))
+ if (WARN_ON_ONCE(inode_mark->group != audit_watch_group))
return 0;
if (mask & (FS_CREATE|FS_MOVED_TO) && inode)
@@ -493,7 +492,7 @@ static const struct fsnotify_ops audit_watch_fsnotify_ops = {
static int __init audit_watch_init(void)
{
- audit_watch_group = fsnotify_alloc_group(&audit_watch_fsnotify_ops);
+ audit_watch_group = fsnotify_alloc_group(&audit_watch_fsnotify_ops, 0);
if (IS_ERR(audit_watch_group)) {
audit_watch_group = NULL;
audit_panic("cannot create audit fsnotify group");
diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index 6b14b4c4068c..5966013bc788 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -507,7 +507,7 @@ static void *bpf_obj_do_get(const char __user *pathname,
return ERR_PTR(ret);
inode = d_backing_inode(path.dentry);
- ret = inode_permission(inode, ACC_MODE(flags));
+ ret = path_permission(&path, ACC_MODE(flags));
if (ret)
goto out;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index e1bee8cd3404..fbe7f8e2b022 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -3929,7 +3929,6 @@ static int bpf_task_fd_query(const union bpf_attr *attr,
pid_t pid = attr->task_fd_query.pid;
u32 fd = attr->task_fd_query.fd;
const struct perf_event *event;
- struct files_struct *files;
struct task_struct *task;
struct file *file;
int err;
@@ -3949,23 +3948,11 @@ static int bpf_task_fd_query(const union bpf_attr *attr,
if (!task)
return -ENOENT;
- files = get_files_struct(task);
- put_task_struct(task);
- if (!files)
- return -ENOENT;
-
err = 0;
- spin_lock(&files->file_lock);
- file = fcheck_files(files, fd);
+ file = fget_task(task, fd);
+ put_task_struct(task);
if (!file)
- err = -EBADF;
- else
- get_file(file);
- spin_unlock(&files->file_lock);
- put_files_struct(files);
-
- if (err)
- goto out;
+ return -EBADF;
if (file->f_op == &bpf_link_fops) {
struct bpf_link *link = file->private_data;
@@ -4005,7 +3992,6 @@ static int bpf_task_fd_query(const union bpf_attr *attr,
err = -ENOTSUPP;
put_file:
fput(file);
-out:
return err;
}
diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index f3d3a562a802..762b4d7c3779 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -185,7 +185,7 @@ task_file_seq_get_next(struct bpf_iter_seq_task_file_info *info)
for (; curr_fd < max_fds; curr_fd++) {
struct file *f;
- f = fcheck_files(curr_files, curr_fd);
+ f = files_lookup_fd_rcu(curr_files, curr_fd);
if (!f)
continue;
if (!get_file_rcu(f))
diff --git a/kernel/fork.c b/kernel/fork.c
index 633b0af1d1a7..8b8a5a172b15 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -3077,21 +3077,21 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
* the exec layer of the kernel.
*/
-int unshare_files(struct files_struct **displaced)
+int unshare_files(void)
{
struct task_struct *task = current;
- struct files_struct *copy = NULL;
+ struct files_struct *old, *copy = NULL;
int error;
error = unshare_fd(CLONE_FILES, NR_OPEN_MAX, ©);
- if (error || !copy) {
- *displaced = NULL;
+ if (error || !copy)
return error;
- }
- *displaced = task->files;
+
+ old = task->files;
task_lock(task);
task->files = copy;
task_unlock(task);
+ put_files_struct(old);
return 0;
}
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index fe9de067771c..8043a90aa50e 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -177,6 +177,11 @@ unsigned long kallsyms_lookup_name(const char *name)
return module_kallsyms_lookup_name(name);
}
+#ifdef CONFIG_LIVEPATCH
+/*
+ * Iterate over all symbols in vmlinux. For symbols from modules use
+ * module_kallsyms_on_each_symbol instead.
+ */
int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
unsigned long),
void *data)
@@ -192,8 +197,9 @@ int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
if (ret != 0)
return ret;
}
- return module_kallsyms_on_each_symbol(fn, data);
+ return 0;
}
+#endif /* CONFIG_LIVEPATCH */
static unsigned long get_symbol_pos(unsigned long addr,
unsigned long *symbolsize,
diff --git a/kernel/kcmp.c b/kernel/kcmp.c
index c0d2ad9b4705..5353edfad8e1 100644
--- a/kernel/kcmp.c
+++ b/kernel/kcmp.c
@@ -61,16 +61,11 @@ static int kcmp_ptr(void *v1, void *v2, enum kcmp_type type)
static struct file *
get_file_raw_ptr(struct task_struct *task, unsigned int idx)
{
- struct file *file = NULL;
+ struct file *file;
- task_lock(task);
rcu_read_lock();
-
- if (task->files)
- file = fcheck_files(task->files, idx);
-
+ file = task_lookup_fd_rcu(task, idx);
rcu_read_unlock();
- task_unlock(task);
return file;
}
@@ -107,7 +102,6 @@ static int kcmp_epoll_target(struct task_struct *task1,
{
struct file *filp, *filp_epoll, *filp_tgt;
struct kcmp_epoll_slot slot;
- struct files_struct *files;
if (copy_from_user(&slot, uslot, sizeof(slot)))
return -EFAULT;
@@ -116,23 +110,12 @@ static int kcmp_epoll_target(struct task_struct *task1,
if (!filp)
return -EBADF;
- files = get_files_struct(task2);
- if (!files)
+ filp_epoll = fget_task(task2, slot.efd);
+ if (!filp_epoll)
return -EBADF;
- spin_lock(&files->file_lock);
- filp_epoll = fcheck_files(files, slot.efd);
- if (filp_epoll)
- get_file(filp_epoll);
- else
- filp_tgt = ERR_PTR(-EBADF);
- spin_unlock(&files->file_lock);
- put_files_struct(files);
-
- if (filp_epoll) {
- filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff);
- fput(filp_epoll);
- }
+ filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff);
+ fput(filp_epoll);
if (IS_ERR(filp_tgt))
return PTR_ERR(filp_tgt);
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 508fe5278285..9d6cc9c15a55 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -262,6 +262,21 @@ void kthread_parkme(void)
}
EXPORT_SYMBOL_GPL(kthread_parkme);
+/**
+ * kthread_exit - Cause the current kthread return @result to kthread_stop().
+ * @result: The integer value to return to kthread_stop().
+ *
+ * While kthread_exit can be called directly, it exists so that
+ * functions which do some additional work in non-modular code such as
+ * module_put_and_kthread_exit can be implemented.
+ *
+ * Does not return.
+ */
+void __noreturn kthread_exit(long result)
+{
+ do_exit(result);
+}
+
static int kthread(void *_create)
{
/* Copy data: it's on kthread's stack */
@@ -279,13 +294,13 @@ static int kthread(void *_create)
done = xchg(&create->done, NULL);
if (!done) {
kfree(create);
- do_exit(-EINTR);
+ kthread_exit(-EINTR);
}
if (!self) {
create->result = ERR_PTR(-ENOMEM);
complete(done);
- do_exit(-ENOMEM);
+ kthread_exit(-ENOMEM);
}
self->threadfn = threadfn;
@@ -312,7 +327,7 @@ static int kthread(void *_create)
__kthread_parkme(self);
ret = threadfn(data);
}
- do_exit(ret);
+ kthread_exit(ret);
}
/* called from do_fork() to get node information for about to be created task */
@@ -621,7 +636,7 @@ EXPORT_SYMBOL_GPL(kthread_park);
* instead of calling wake_up_process(): the thread will exit without
* calling threadfn().
*
- * If threadfn() may call do_exit() itself, the caller must ensure
+ * If threadfn() may call kthread_exit() itself, the caller must ensure
* task_struct can't go away.
*
* Returns the result of threadfn(), or %-EINTR if wake_up_process()
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index f5faf935c2d8..147ed154ebc7 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -19,6 +19,7 @@
#include <linux/moduleloader.h>
#include <linux/completion.h>
#include <linux/memory.h>
+#include <linux/rcupdate.h>
#include <asm/cacheflush.h>
#include "core.h"
#include "patch.h"
@@ -57,7 +58,7 @@ static void klp_find_object_module(struct klp_object *obj)
if (!klp_is_module(obj))
return;
- mutex_lock(&module_mutex);
+ rcu_read_lock_sched();
/*
* We do not want to block removal of patched modules and therefore
* we do not take a reference here. The patches are removed by
@@ -74,7 +75,7 @@ static void klp_find_object_module(struct klp_object *obj)
if (mod && mod->klp_alive)
obj->mod = mod;
- mutex_unlock(&module_mutex);
+ rcu_read_unlock_sched();
}
static bool klp_initialized(void)
@@ -163,12 +164,10 @@ static int klp_find_object_symbol(const char *objname, const char *name,
.pos = sympos,
};
- mutex_lock(&module_mutex);
if (objname)
module_kallsyms_on_each_symbol(klp_find_callback, &args);
else
kallsyms_on_each_symbol(klp_find_callback, &args);
- mutex_unlock(&module_mutex);
/*
* Ensure an address was found. If sympos is 0, ensure symbol is unique;
diff --git a/kernel/module.c b/kernel/module.c
index 72a5dcdccf7b..edc7b99cb16f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -88,7 +88,6 @@
* 3) module_addr_min/module_addr_max.
* (delete and add uses RCU list operations). */
DEFINE_MUTEX(module_mutex);
-EXPORT_SYMBOL_GPL(module_mutex);
static LIST_HEAD(modules);
/* Work queue for freeing init sections in success case */
@@ -256,11 +255,6 @@ static void mod_update_bounds(struct module *mod)
struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */
#endif /* CONFIG_KGDB_KDB */
-static void module_assert_mutex(void)
-{
- lockdep_assert_held(&module_mutex);
-}
-
static void module_assert_mutex_or_preempt(void)
{
#ifdef CONFIG_LOCKDEP
@@ -340,14 +334,14 @@ static inline void add_taint_module(struct module *mod, unsigned flag,
/*
* A thread that wants to hold a reference to a module only while it
- * is running can call this to safely exit. nfsd and lockd use this.
+ * is running can call this to safely exit.
*/
-void __noreturn __module_put_and_exit(struct module *mod, long code)
+void __noreturn __module_put_and_kthread_exit(struct module *mod, long code)
{
module_put(mod);
- do_exit(code);
+ kthread_exit(code);
}
-EXPORT_SYMBOL(__module_put_and_exit);
+EXPORT_SYMBOL(__module_put_and_kthread_exit);
/* Find a module section: 0 means not found. */
static unsigned int find_sec(const struct load_info *info, const char *name)
@@ -642,10 +636,8 @@ static struct module *find_module_all(const char *name, size_t len,
struct module *find_module(const char *name)
{
- module_assert_mutex();
return find_module_all(name, strlen(name), false);
}
-EXPORT_SYMBOL_GPL(find_module);
#ifdef CONFIG_SMP
@@ -4452,6 +4444,7 @@ unsigned long module_kallsyms_lookup_name(const char *name)
return ret;
}
+#ifdef CONFIG_LIVEPATCH
int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
struct module *, unsigned long),
void *data)
@@ -4460,8 +4453,7 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
unsigned int i;
int ret;
- module_assert_mutex();
-
+ mutex_lock(&module_mutex);
list_for_each_entry(mod, &modules, list) {
/* We hold module_mutex: no need for rcu_dereference_sched */
struct mod_kallsyms *kallsyms = mod->kallsyms;
@@ -4477,11 +4469,13 @@ int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
ret = fn(data, kallsyms_symbol_name(kallsyms, i),
mod, kallsyms_symbol_value(sym));
if (ret != 0)
- return ret;
+ break;
}
}
- return 0;
+ mutex_unlock(&module_mutex);
+ return ret;
}
+#endif /* CONFIG_LIVEPATCH */
#endif /* CONFIG_KALLSYMS */
/* Maximum number of characters written by module_flags() */
diff --git a/kernel/pid.c b/kernel/pid.c
index 4856818c9de1..0820f2c50bb0 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -550,13 +550,21 @@ struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags)
* Note, that this function can only be called after the fd table has
* been unshared to avoid leaking the pidfd to the new process.
*
+ * This symbol should not be explicitly exported to loadable modules.
+ *
* Return: On success, a cloexec pidfd is returned.
* On error, a negative errno number will be returned.
*/
-static int pidfd_create(struct pid *pid, unsigned int flags)
+int pidfd_create(struct pid *pid, unsigned int flags)
{
int fd;
+ if (!pid || !pid_has_task(pid, PIDTYPE_TGID))
+ return -EINVAL;
+
+ if (flags & ~(O_NONBLOCK | O_RDWR | O_CLOEXEC))
+ return -EINVAL;
+
fd = anon_inode_getfd("[pidfd]", &pidfd_fops, get_pid(pid),
flags | O_RDWR | O_CLOEXEC);
if (fd < 0)
@@ -596,10 +604,7 @@ SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags)
if (!p)
return -ESRCH;
- if (pid_has_task(p, PIDTYPE_TGID))
- fd = pidfd_create(p, flags);
- else
- fd = -EINVAL;
+ fd = pidfd_create(p, flags);
put_pid(p);
return fd;
diff --git a/kernel/sys.c b/kernel/sys.c
index efc213ae4c5a..7a2cfb57fa9e 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1873,7 +1873,7 @@ static int prctl_set_mm_exe_file(struct mm_struct *mm, unsigned int fd)
if (!S_ISREG(inode->i_mode) || path_noexec(&exe.file->f_path))
goto exit;
- err = inode_permission(inode, MAY_EXEC);
+ err = file_permission(exe.file, MAY_EXEC);
if (err)
goto exit;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 99a19190196e..abe0f16d5364 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -142,6 +142,9 @@ static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
#ifdef CONFIG_INOTIFY_USER
#include <linux/inotify.h>
#endif
+#ifdef CONFIG_FANOTIFY
+#include <linux/fanotify.h>
+#endif
#ifdef CONFIG_PROC_SYSCTL
@@ -543,6 +546,21 @@ static void proc_put_char(void **buf, size_t *size, char c)
}
}
+static int do_proc_dobool_conv(bool *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ if (write) {
+ *(bool *)valp = *lvalp;
+ } else {
+ int val = *(bool *)valp;
+
+ *lvalp = (unsigned long)val;
+ *negp = false;
+ }
+ return 0;
+}
+
static int do_proc_dointvec_conv(bool *negp, unsigned long *lvalp,
int *valp,
int write, void *data)
@@ -805,6 +823,26 @@ static int do_proc_douintvec(struct ctl_table *table, int write,
buffer, lenp, ppos, conv, data);
}
+/**
+ * proc_dobool - read/write a bool
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * Returns 0 on success.
+ */
+int proc_dobool(struct ctl_table *table, int write, void *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ return do_proc_dointvec(table, write, buffer, lenp, ppos,
+ do_proc_dobool_conv, NULL);
+}
+
/**
* proc_dointvec - read a vector of integers
* @table: the sysctl table
@@ -1641,6 +1679,12 @@ int proc_dostring(struct ctl_table *table, int write,
return -ENOSYS;
}
+int proc_dobool(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
int proc_dointvec(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
@@ -3330,7 +3374,14 @@ static struct ctl_table fs_table[] = {
.mode = 0555,
.child = inotify_table,
},
-#endif
+#endif
+#ifdef CONFIG_FANOTIFY
+ {
+ .procname = "fanotify",
+ .mode = 0555,
+ .child = fanotify_table,
+ },
+#endif
#ifdef CONFIG_EPOLL
{
.procname = "epoll",
@@ -3493,6 +3544,7 @@ int __init sysctl_init(void)
* No sense putting this after each symbol definition, twice,
* exception granted :-)
*/
+EXPORT_SYMBOL(proc_dobool);
EXPORT_SYMBOL(proc_dointvec);
EXPORT_SYMBOL(proc_douintvec);
EXPORT_SYMBOL(proc_dointvec_jiffies);
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 718357289899..5453af26ff76 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -124,9 +124,9 @@ static nokprobe_inline bool trace_kprobe_module_exist(struct trace_kprobe *tk)
if (!p)
return true;
*p = '\0';
- mutex_lock(&module_mutex);
+ rcu_read_lock_sched();
ret = !!find_module(tk->symbol);
- mutex_unlock(&module_mutex);
+ rcu_read_unlock_sched();
*p = ':';
return ret;
diff --git a/kernel/ucount.c b/kernel/ucount.c
index 11b1596e2542..8d8874f1c35e 100644
--- a/kernel/ucount.c
+++ b/kernel/ucount.c
@@ -73,6 +73,10 @@ static struct ctl_table user_table[] = {
#ifdef CONFIG_INOTIFY_USER
UCOUNT_ENTRY("max_inotify_instances"),
UCOUNT_ENTRY("max_inotify_watches"),
+#endif
+#ifdef CONFIG_FANOTIFY
+ UCOUNT_ENTRY("max_fanotify_groups"),
+ UCOUNT_ENTRY("max_fanotify_marks"),
#endif
{ }
};
diff --git a/mm/madvise.c b/mm/madvise.c
index f71fc88f0b33..a63aa04ec7fa 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -543,7 +543,7 @@ static inline bool can_do_pageout(struct vm_area_struct *vma)
* opens a side channel.
*/
return inode_owner_or_capable(file_inode(vma->vm_file)) ||
- inode_permission(file_inode(vma->vm_file), MAY_WRITE) == 0;
+ file_permission(vma->vm_file, MAY_WRITE) == 0;
}
static long madvise_pageout(struct vm_area_struct *vma,
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ddc8ed096dec..186ae9dba0fd 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4918,7 +4918,7 @@ static ssize_t memcg_write_event_control(struct kernfs_open_file *of,
/* the process need read permission on control file */
/* AV: shouldn't we check that it's been opened for read instead? */
- ret = inode_permission(file_inode(cfile.file), MAY_READ);
+ ret = file_permission(cfile.file, MAY_READ);
if (ret < 0)
goto out_put_cfile;
diff --git a/mm/mincore.c b/mm/mincore.c
index 02db1a834021..7bdb4673f776 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -167,7 +167,7 @@ static inline bool can_do_mincore(struct vm_area_struct *vma)
* mappings, which opens a side channel.
*/
return inode_owner_or_capable(file_inode(vma->vm_file)) ||
- inode_permission(file_inode(vma->vm_file), MAY_WRITE) == 0;
+ file_permission(vma->vm_file, MAY_WRITE) == 0;
}
static const struct mm_walk_ops mincore_walk_ops = {
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index 43c284158f63..09b6d825124e 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -535,7 +535,7 @@ static int bnep_session(void *arg)
up_write(&bnep_session_sem);
free_netdev(dev);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
return 0;
}
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index 83eb84e8e688..90d130588a3e 100644
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -323,7 +323,7 @@ static int cmtp_session(void *arg)
up_write(&cmtp_session_sem);
kfree(session);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
return 0;
}
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index b946a6379433..3ff870599eb7 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -1305,7 +1305,7 @@ static int hidp_session_thread(void *arg)
l2cap_unregister_user(session->conn, &session->user);
hidp_session_put(session);
- module_put_and_exit(0);
+ module_put_and_kthread_exit(0);
return 0;
}
diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c
index e265b8d38aa1..a857fc99431c 100644
--- a/net/sunrpc/auth_gss/gss_rpc_xdr.c
+++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c
@@ -800,7 +800,7 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
scratch = alloc_page(GFP_KERNEL);
if (!scratch)
return -ENOMEM;
- xdr_set_scratch_buffer(xdr, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(xdr, scratch);
/* res->status */
err = gssx_dec_status(xdr, &res->status);
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 784c8b24f164..329eac782cc5 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -707,11 +707,11 @@ svc_safe_putnetobj(struct kvec *resv, struct xdr_netobj *o)
/*
* Verify the checksum on the header and return SVC_OK on success.
* Otherwise, return SVC_DROP (in the case of a bad sequence number)
- * or return SVC_DENIED and indicate error in authp.
+ * or return SVC_DENIED and indicate error in rqstp->rq_auth_stat.
*/
static int
gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
- __be32 *rpcstart, struct rpc_gss_wire_cred *gc, __be32 *authp)
+ __be32 *rpcstart, struct rpc_gss_wire_cred *gc)
{
struct gss_ctx *ctx_id = rsci->mechctx;
struct xdr_buf rpchdr;
@@ -725,7 +725,7 @@ gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
iov.iov_len = (u8 *)argv->iov_base - (u8 *)rpcstart;
xdr_buf_from_iov(&iov, &rpchdr);
- *authp = rpc_autherr_badverf;
+ rqstp->rq_auth_stat = rpc_autherr_badverf;
if (argv->iov_len < 4)
return SVC_DENIED;
flavor = svc_getnl(argv);
@@ -737,13 +737,13 @@ gss_verify_header(struct svc_rqst *rqstp, struct rsc *rsci,
if (rqstp->rq_deferred) /* skip verification of revisited request */
return SVC_OK;
if (gss_verify_mic(ctx_id, &rpchdr, &checksum) != GSS_S_COMPLETE) {
- *authp = rpcsec_gsserr_credproblem;
+ rqstp->rq_auth_stat = rpcsec_gsserr_credproblem;
return SVC_DENIED;
}
if (gc->gc_seq > MAXSEQ) {
trace_rpcgss_svc_seqno_large(rqstp, gc->gc_seq);
- *authp = rpcsec_gsserr_ctxproblem;
+ rqstp->rq_auth_stat = rpcsec_gsserr_ctxproblem;
return SVC_DENIED;
}
if (!gss_check_seq_num(rqstp, rsci, gc->gc_seq))
@@ -1038,6 +1038,8 @@ svcauth_gss_set_client(struct svc_rqst *rqstp)
struct rpc_gss_wire_cred *gc = &svcdata->clcred;
int stat;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
+
/*
* A gss export can be specified either by:
* export *(sec=krb5,rw)
@@ -1053,6 +1055,8 @@ svcauth_gss_set_client(struct svc_rqst *rqstp)
stat = svcauth_unix_set_client(rqstp);
if (stat == SVC_DROP || stat == SVC_CLOSE)
return stat;
+
+ rqstp->rq_auth_stat = rpc_auth_ok;
return SVC_OK;
}
@@ -1136,7 +1140,7 @@ static void gss_free_in_token_pages(struct gssp_in_token *in_token)
}
static int gss_read_proxy_verf(struct svc_rqst *rqstp,
- struct rpc_gss_wire_cred *gc, __be32 *authp,
+ struct rpc_gss_wire_cred *gc,
struct xdr_netobj *in_handle,
struct gssp_in_token *in_token)
{
@@ -1145,7 +1149,7 @@ static int gss_read_proxy_verf(struct svc_rqst *rqstp,
int pages, i, res, pgto, pgfrom;
size_t inlen, to_offs, from_offs;
- res = gss_read_common_verf(gc, argv, authp, in_handle);
+ res = gss_read_common_verf(gc, argv, &rqstp->rq_auth_stat, in_handle);
if (res)
return res;
@@ -1226,7 +1230,7 @@ gss_write_resv(struct kvec *resv, size_t size_limit,
* Otherwise, drop the request pending an answer to the upcall.
*/
static int svcauth_gss_legacy_init(struct svc_rqst *rqstp,
- struct rpc_gss_wire_cred *gc, __be32 *authp)
+ struct rpc_gss_wire_cred *gc)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
@@ -1235,7 +1239,7 @@ static int svcauth_gss_legacy_init(struct svc_rqst *rqstp,
struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
memset(&rsikey, 0, sizeof(rsikey));
- ret = gss_read_verf(gc, argv, authp,
+ ret = gss_read_verf(gc, argv, &rqstp->rq_auth_stat,
&rsikey.in_handle, &rsikey.in_token);
if (ret)
return ret;
@@ -1338,7 +1342,7 @@ static int gss_proxy_save_rsc(struct cache_detail *cd,
}
static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
- struct rpc_gss_wire_cred *gc, __be32 *authp)
+ struct rpc_gss_wire_cred *gc)
{
struct kvec *resv = &rqstp->rq_res.head[0];
struct xdr_netobj cli_handle;
@@ -1350,8 +1354,7 @@ static int svcauth_gss_proxy_init(struct svc_rqst *rqstp,
struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
memset(&ud, 0, sizeof(ud));
- ret = gss_read_proxy_verf(rqstp, gc, authp,
- &ud.in_handle, &ud.in_token);
+ ret = gss_read_proxy_verf(rqstp, gc, &ud.in_handle, &ud.in_token);
if (ret)
return ret;
@@ -1524,7 +1527,7 @@ static void destroy_use_gss_proxy_proc_entry(struct net *net) {}
* response here and return SVC_COMPLETE.
*/
static int
-svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
+svcauth_gss_accept(struct svc_rqst *rqstp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
@@ -1537,7 +1540,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
int ret;
struct sunrpc_net *sn = net_generic(SVC_NET(rqstp), sunrpc_net_id);
- *authp = rpc_autherr_badcred;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
if (!svcdata)
svcdata = kmalloc(sizeof(*svcdata), GFP_KERNEL);
if (!svcdata)
@@ -1574,22 +1577,22 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
if ((gc->gc_proc != RPC_GSS_PROC_DATA) && (rqstp->rq_proc != 0))
goto auth_err;
- *authp = rpc_autherr_badverf;
+ rqstp->rq_auth_stat = rpc_autherr_badverf;
switch (gc->gc_proc) {
case RPC_GSS_PROC_INIT:
case RPC_GSS_PROC_CONTINUE_INIT:
if (use_gss_proxy(SVC_NET(rqstp)))
- return svcauth_gss_proxy_init(rqstp, gc, authp);
+ return svcauth_gss_proxy_init(rqstp, gc);
else
- return svcauth_gss_legacy_init(rqstp, gc, authp);
+ return svcauth_gss_legacy_init(rqstp, gc);
case RPC_GSS_PROC_DATA:
case RPC_GSS_PROC_DESTROY:
/* Look up the context, and check the verifier: */
- *authp = rpcsec_gsserr_credproblem;
+ rqstp->rq_auth_stat = rpcsec_gsserr_credproblem;
rsci = gss_svc_searchbyctx(sn->rsc_cache, &gc->gc_ctx);
if (!rsci)
goto auth_err;
- switch (gss_verify_header(rqstp, rsci, rpcstart, gc, authp)) {
+ switch (gss_verify_header(rqstp, rsci, rpcstart, gc)) {
case SVC_OK:
break;
case SVC_DENIED:
@@ -1599,7 +1602,7 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
}
break;
default:
- *authp = rpc_autherr_rejectedcred;
+ rqstp->rq_auth_stat = rpc_autherr_rejectedcred;
goto auth_err;
}
@@ -1615,13 +1618,13 @@ svcauth_gss_accept(struct svc_rqst *rqstp, __be32 *authp)
svc_putnl(resv, RPC_SUCCESS);
goto complete;
case RPC_GSS_PROC_DATA:
- *authp = rpcsec_gsserr_ctxproblem;
+ rqstp->rq_auth_stat = rpcsec_gsserr_ctxproblem;
svcdata->verf_start = resv->iov_base + resv->iov_len;
if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
goto auth_err;
rqstp->rq_cred = rsci->cred;
get_group_info(rsci->cred.cr_group_info);
- *authp = rpc_autherr_badcred;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
switch (gc->gc_svc) {
case RPC_GSS_SVC_NONE:
break;
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index a00890962e11..a4c9d410eb8d 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -821,6 +821,7 @@ void rpc_exit_task(struct rpc_task *task)
else if (task->tk_client)
rpc_count_iostats(task, task->tk_client->cl_metrics);
if (task->tk_ops->rpc_call_done != NULL) {
+ trace_rpc_task_call_done(task, task->tk_ops->rpc_call_done);
task->tk_ops->rpc_call_done(task, task->tk_calldata);
if (task->tk_action != NULL) {
/* Always release the RPC slot and buffer memory */
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index cfe8b911ca01..26d972c54a59 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -35,18 +35,37 @@
static void svc_unregister(const struct svc_serv *serv, struct net *net);
-#define svc_serv_is_pooled(serv) ((serv)->sv_ops->svo_function)
-
#define SVC_POOL_DEFAULT SVC_POOL_GLOBAL
+/*
+ * Mode for mapping cpus to pools.
+ */
+enum {
+ SVC_POOL_AUTO = -1, /* choose one of the others */
+ SVC_POOL_GLOBAL, /* no mapping, just a single global pool
+ * (legacy & UP mode) */
+ SVC_POOL_PERCPU, /* one pool per cpu */
+ SVC_POOL_PERNODE /* one pool per numa node */
+};
+
/*
* Structure for mapping cpus to pools and vice versa.
* Setup once during sunrpc initialisation.
*/
-struct svc_pool_map svc_pool_map = {
+
+struct svc_pool_map {
+ int count; /* How many svc_servs use us */
+ int mode; /* Note: int not enum to avoid
+ * warnings about "enumeration value
+ * not handled in switch" */
+ unsigned int npools;
+ unsigned int *pool_to; /* maps pool id to cpu or node */
+ unsigned int *to_pool; /* maps cpu or node to pool id */
+};
+
+static struct svc_pool_map svc_pool_map = {
.mode = SVC_POOL_DEFAULT
};
-EXPORT_SYMBOL_GPL(svc_pool_map);
static DEFINE_MUTEX(svc_pool_map_mutex);/* protects svc_pool_map.count only */
@@ -217,10 +236,12 @@ svc_pool_map_init_pernode(struct svc_pool_map *m)
/*
* Add a reference to the global map of cpus to pools (and
- * vice versa). Initialise the map if we're the first user.
- * Returns the number of pools.
+ * vice versa) if pools are in use.
+ * Initialise the map if we're the first user.
+ * Returns the number of pools. If this is '1', no reference
+ * was taken.
*/
-unsigned int
+static unsigned int
svc_pool_map_get(void)
{
struct svc_pool_map *m = &svc_pool_map;
@@ -230,6 +251,7 @@ svc_pool_map_get(void)
if (m->count++) {
mutex_unlock(&svc_pool_map_mutex);
+ WARN_ON_ONCE(m->npools <= 1);
return m->npools;
}
@@ -245,30 +267,36 @@ svc_pool_map_get(void)
break;
}
- if (npools < 0) {
+ if (npools <= 0) {
/* default, or memory allocation failure */
npools = 1;
m->mode = SVC_POOL_GLOBAL;
}
m->npools = npools;
+ if (npools == 1)
+ /* service is unpooled, so doesn't hold a reference */
+ m->count--;
+
mutex_unlock(&svc_pool_map_mutex);
- return m->npools;
+ return npools;
}
-EXPORT_SYMBOL_GPL(svc_pool_map_get);
/*
- * Drop a reference to the global map of cpus to pools.
+ * Drop a reference to the global map of cpus to pools, if
+ * pools were in use, i.e. if npools > 1.
* When the last reference is dropped, the map data is
* freed; this allows the sysadmin to change the pool
* mode using the pool_mode module option without
* rebooting or re-loading sunrpc.ko.
*/
-void
-svc_pool_map_put(void)
+static void
+svc_pool_map_put(int npools)
{
struct svc_pool_map *m = &svc_pool_map;
+ if (npools <= 1)
+ return;
mutex_lock(&svc_pool_map_mutex);
if (!--m->count) {
@@ -281,7 +309,6 @@ svc_pool_map_put(void)
mutex_unlock(&svc_pool_map_mutex);
}
-EXPORT_SYMBOL_GPL(svc_pool_map_put);
static int svc_pool_map_get_node(unsigned int pidx)
{
@@ -338,21 +365,18 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
struct svc_pool_map *m = &svc_pool_map;
unsigned int pidx = 0;
- /*
- * An uninitialised map happens in a pure client when
- * lockd is brought up, so silently treat it the
- * same as SVC_POOL_GLOBAL.
- */
- if (svc_serv_is_pooled(serv)) {
- switch (m->mode) {
- case SVC_POOL_PERCPU:
- pidx = m->to_pool[cpu];
- break;
- case SVC_POOL_PERNODE:
- pidx = m->to_pool[cpu_to_node(cpu)];
- break;
- }
+ if (serv->sv_nrpools <= 1)
+ return serv->sv_pools;
+
+ switch (m->mode) {
+ case SVC_POOL_PERCPU:
+ pidx = m->to_pool[cpu];
+ break;
+ case SVC_POOL_PERNODE:
+ pidx = m->to_pool[cpu_to_node(cpu)];
+ break;
}
+
return &serv->sv_pools[pidx % serv->sv_nrpools];
}
@@ -422,7 +446,7 @@ __svc_init_bc(struct svc_serv *serv)
*/
static struct svc_serv *
__svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
- const struct svc_serv_ops *ops)
+ int (*threadfn)(void *data))
{
struct svc_serv *serv;
unsigned int vers;
@@ -433,13 +457,13 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
return NULL;
serv->sv_name = prog->pg_name;
serv->sv_program = prog;
- serv->sv_nrthreads = 1;
+ kref_init(&serv->sv_refcnt);
serv->sv_stats = prog->pg_stats;
if (bufsize > RPCSVC_MAXPAYLOAD)
bufsize = RPCSVC_MAXPAYLOAD;
serv->sv_max_payload = bufsize? bufsize : 4096;
serv->sv_max_mesg = roundup(serv->sv_max_payload + PAGE_SIZE, PAGE_SIZE);
- serv->sv_ops = ops;
+ serv->sv_threadfn = threadfn;
xdrsize = 0;
while (prog) {
prog->pg_lovers = prog->pg_nvers-1;
@@ -485,59 +509,56 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
return serv;
}
-struct svc_serv *
-svc_create(struct svc_program *prog, unsigned int bufsize,
- const struct svc_serv_ops *ops)
+/**
+ * svc_create - Create an RPC service
+ * @prog: the RPC program the new service will handle
+ * @bufsize: maximum message size for @prog
+ * @threadfn: a function to service RPC requests for @prog
+ *
+ * Returns an instantiated struct svc_serv object or NULL.
+ */
+struct svc_serv *svc_create(struct svc_program *prog, unsigned int bufsize,
+ int (*threadfn)(void *data))
{
- return __svc_create(prog, bufsize, /*npools*/1, ops);
+ return __svc_create(prog, bufsize, 1, threadfn);
}
EXPORT_SYMBOL_GPL(svc_create);
-struct svc_serv *
-svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
- const struct svc_serv_ops *ops)
+/**
+ * svc_create_pooled - Create an RPC service with pooled threads
+ * @prog: the RPC program the new service will handle
+ * @bufsize: maximum message size for @prog
+ * @threadfn: a function to service RPC requests for @prog
+ *
+ * Returns an instantiated struct svc_serv object or NULL.
+ */
+struct svc_serv *svc_create_pooled(struct svc_program *prog,
+ unsigned int bufsize,
+ int (*threadfn)(void *data))
{
struct svc_serv *serv;
unsigned int npools = svc_pool_map_get();
- serv = __svc_create(prog, bufsize, npools, ops);
+ serv = __svc_create(prog, bufsize, npools, threadfn);
if (!serv)
goto out_err;
return serv;
out_err:
- svc_pool_map_put();
+ svc_pool_map_put(npools);
return NULL;
}
EXPORT_SYMBOL_GPL(svc_create_pooled);
-void svc_shutdown_net(struct svc_serv *serv, struct net *net)
-{
- svc_close_net(serv, net);
-
- if (serv->sv_ops->svo_shutdown)
- serv->sv_ops->svo_shutdown(serv, net);
-}
-EXPORT_SYMBOL_GPL(svc_shutdown_net);
-
/*
* Destroy an RPC service. Should be called with appropriate locking to
- * protect the sv_nrthreads, sv_permsocks and sv_tempsocks.
+ * protect sv_permsocks and sv_tempsocks.
*/
void
-svc_destroy(struct svc_serv *serv)
+svc_destroy(struct kref *ref)
{
- dprintk("svc: svc_destroy(%s, %d)\n",
- serv->sv_program->pg_name,
- serv->sv_nrthreads);
-
- if (serv->sv_nrthreads) {
- if (--(serv->sv_nrthreads) != 0) {
- svc_sock_update_bufs(serv);
- return;
- }
- } else
- printk("svc_destroy: no threads for serv=%p!\n", serv);
+ struct svc_serv *serv = container_of(ref, struct svc_serv, sv_refcnt);
+ dprintk("svc: svc_destroy(%s)\n", serv->sv_program->pg_name);
del_timer_sync(&serv->sv_temptimer);
/*
@@ -549,8 +570,7 @@ svc_destroy(struct svc_serv *serv)
cache_clean_deferred(serv);
- if (svc_serv_is_pooled(serv))
- svc_pool_map_put();
+ svc_pool_map_put(serv->sv_nrpools);
kfree(serv->sv_pools);
kfree(serv);
@@ -614,6 +634,10 @@ svc_rqst_alloc(struct svc_serv *serv, struct svc_pool *pool, int node)
rqstp->rq_server = serv;
rqstp->rq_pool = pool;
+ rqstp->rq_scratch_page = alloc_pages_node(node, GFP_KERNEL, 0);
+ if (!rqstp->rq_scratch_page)
+ goto out_enomem;
+
rqstp->rq_argp = kmalloc_node(serv->sv_xdrsize, GFP_KERNEL, node);
if (!rqstp->rq_argp)
goto out_enomem;
@@ -632,7 +656,7 @@ svc_rqst_alloc(struct svc_serv *serv, struct svc_pool *pool, int node)
}
EXPORT_SYMBOL_GPL(svc_rqst_alloc);
-struct svc_rqst *
+static struct svc_rqst *
svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node)
{
struct svc_rqst *rqstp;
@@ -641,14 +665,17 @@ svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node)
if (!rqstp)
return ERR_PTR(-ENOMEM);
- serv->sv_nrthreads++;
+ svc_get(serv);
+ spin_lock_bh(&serv->sv_lock);
+ serv->sv_nrthreads += 1;
+ spin_unlock_bh(&serv->sv_lock);
+
spin_lock_bh(&pool->sp_lock);
pool->sp_nrthreads++;
list_add_rcu(&rqstp->rq_all, &pool->sp_all_threads);
spin_unlock_bh(&pool->sp_lock);
return rqstp;
}
-EXPORT_SYMBOL_GPL(svc_prepare_thread);
/*
* Choose a pool in which to create a new thread, for svc_set_num_threads
@@ -722,11 +749,9 @@ svc_start_kthreads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
if (IS_ERR(rqstp))
return PTR_ERR(rqstp);
- __module_get(serv->sv_ops->svo_module);
- task = kthread_create_on_node(serv->sv_ops->svo_function, rqstp,
+ task = kthread_create_on_node(serv->sv_threadfn, rqstp,
node, "%s", serv->sv_name);
if (IS_ERR(task)) {
- module_put(serv->sv_ops->svo_module);
svc_exit_thread(rqstp);
return PTR_ERR(task);
}
@@ -742,59 +767,13 @@ svc_start_kthreads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
return 0;
}
-
-/* destroy old threads */
-static int
-svc_signal_kthreads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
-{
- struct task_struct *task;
- unsigned int state = serv->sv_nrthreads-1;
-
- /* destroy old threads */
- do {
- task = choose_victim(serv, pool, &state);
- if (task == NULL)
- break;
- send_sig(SIGINT, task, 1);
- nrservs++;
- } while (nrservs < 0);
-
- return 0;
-}
-
/*
* Create or destroy enough new threads to make the number
* of threads the given number. If `pool' is non-NULL, applies
* only to threads in that pool, otherwise round-robins between
* all pools. Caller must ensure that mutual exclusion between this and
* server startup or shutdown.
- *
- * Destroying threads relies on the service threads filling in
- * rqstp->rq_task, which only the nfs ones do. Assumes the serv
- * has been created using svc_create_pooled().
- *
- * Based on code that used to be in nfsd_svc() but tweaked
- * to be pool-aware.
*/
-int
-svc_set_num_threads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
-{
- if (pool == NULL) {
- /* The -1 assumes caller has done a svc_get() */
- nrservs -= (serv->sv_nrthreads-1);
- } else {
- spin_lock_bh(&pool->sp_lock);
- nrservs -= pool->sp_nrthreads;
- spin_unlock_bh(&pool->sp_lock);
- }
-
- if (nrservs > 0)
- return svc_start_kthreads(serv, pool, nrservs);
- if (nrservs < 0)
- return svc_signal_kthreads(serv, pool, nrservs);
- return 0;
-}
-EXPORT_SYMBOL_GPL(svc_set_num_threads);
/* destroy old threads */
static int
@@ -819,11 +798,10 @@ svc_stop_kthreads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
}
int
-svc_set_num_threads_sync(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
+svc_set_num_threads(struct svc_serv *serv, struct svc_pool *pool, int nrservs)
{
if (pool == NULL) {
- /* The -1 assumes caller has done a svc_get() */
- nrservs -= (serv->sv_nrthreads-1);
+ nrservs -= serv->sv_nrthreads;
} else {
spin_lock_bh(&pool->sp_lock);
nrservs -= pool->sp_nrthreads;
@@ -836,7 +814,28 @@ svc_set_num_threads_sync(struct svc_serv *serv, struct svc_pool *pool, int nrser
return svc_stop_kthreads(serv, pool, nrservs);
return 0;
}
-EXPORT_SYMBOL_GPL(svc_set_num_threads_sync);
+EXPORT_SYMBOL_GPL(svc_set_num_threads);
+
+/**
+ * svc_rqst_replace_page - Replace one page in rq_pages[]
+ * @rqstp: svc_rqst with pages to replace
+ * @page: replacement page
+ *
+ * When replacing a page in rq_pages, batch the release of the
+ * replaced pages to avoid hammering the page allocator.
+ */
+void svc_rqst_replace_page(struct svc_rqst *rqstp, struct page *page)
+{
+ if (*rqstp->rq_next_page) {
+ if (!pagevec_space(&rqstp->rq_pvec))
+ __pagevec_release(&rqstp->rq_pvec);
+ pagevec_add(&rqstp->rq_pvec, *rqstp->rq_next_page);
+ }
+
+ get_page(page);
+ *(rqstp->rq_next_page++) = page;
+}
+EXPORT_SYMBOL_GPL(svc_rqst_replace_page);
/*
* Called from a server thread as it's exiting. Caller must hold the "service
@@ -846,6 +845,7 @@ void
svc_rqst_free(struct svc_rqst *rqstp)
{
svc_release_buffer(rqstp);
+ put_page(rqstp->rq_scratch_page);
kfree(rqstp->rq_resp);
kfree(rqstp->rq_argp);
kfree(rqstp->rq_auth_data);
@@ -865,11 +865,14 @@ svc_exit_thread(struct svc_rqst *rqstp)
list_del_rcu(&rqstp->rq_all);
spin_unlock_bh(&pool->sp_lock);
+ spin_lock_bh(&serv->sv_lock);
+ serv->sv_nrthreads -= 1;
+ spin_unlock_bh(&serv->sv_lock);
+ svc_sock_update_bufs(serv);
+
svc_rqst_free(rqstp);
- /* Release the server */
- if (serv)
- svc_destroy(serv);
+ svc_put(serv);
}
EXPORT_SYMBOL_GPL(svc_exit_thread);
@@ -1161,22 +1164,6 @@ void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
static __printf(2,3) void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) {}
#endif
-__be32
-svc_return_autherr(struct svc_rqst *rqstp, __be32 auth_err)
-{
- set_bit(RQ_AUTHERR, &rqstp->rq_flags);
- return auth_err;
-}
-EXPORT_SYMBOL_GPL(svc_return_autherr);
-
-static __be32
-svc_get_autherr(struct svc_rqst *rqstp, __be32 *statp)
-{
- if (test_and_clear_bit(RQ_AUTHERR, &rqstp->rq_flags))
- return *statp;
- return rpc_auth_ok;
-}
-
static int
svc_generic_dispatch(struct svc_rqst *rqstp, __be32 *statp)
{
@@ -1200,7 +1187,7 @@ svc_generic_dispatch(struct svc_rqst *rqstp, __be32 *statp)
test_bit(RQ_DROPME, &rqstp->rq_flags))
return 0;
- if (test_bit(RQ_AUTHERR, &rqstp->rq_flags))
+ if (rqstp->rq_auth_stat != rpc_auth_ok)
return 1;
if (*statp != rpc_success)
@@ -1250,7 +1237,7 @@ svc_generic_init_request(struct svc_rqst *rqstp,
rqstp->rq_procinfo = procp = &versp->vs_proc[rqstp->rq_proc];
/* Initialize storage for argp and resp */
- memset(rqstp->rq_argp, 0, procp->pc_argsize);
+ memset(rqstp->rq_argp, 0, procp->pc_argzero);
memset(rqstp->rq_resp, 0, procp->pc_ressize);
/* Bump per-procedure stats counter */
@@ -1279,7 +1266,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
struct svc_process_info process;
__be32 *statp;
u32 prog, vers;
- __be32 auth_stat, rpc_stat;
+ __be32 rpc_stat;
int auth_res;
__be32 *reply_statp;
@@ -1322,14 +1309,12 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
* We do this before anything else in order to get a decent
* auth verifier.
*/
- auth_res = svc_authenticate(rqstp, &auth_stat);
+ auth_res = svc_authenticate(rqstp);
/* Also give the program a chance to reject this call: */
- if (auth_res == SVC_OK && progp) {
- auth_stat = rpc_autherr_badcred;
+ if (auth_res == SVC_OK && progp)
auth_res = progp->pg_authenticate(rqstp);
- }
if (auth_res != SVC_OK)
- trace_svc_authenticate(rqstp, auth_res, auth_stat);
+ trace_svc_authenticate(rqstp, auth_res);
switch (auth_res) {
case SVC_OK:
break;
@@ -1388,15 +1373,15 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
goto release_dropit;
if (*statp == rpc_garbage_args)
goto err_garbage;
- auth_stat = svc_get_autherr(rqstp, statp);
- if (auth_stat != rpc_auth_ok)
- goto err_release_bad_auth;
} else {
dprintk("svc: calling dispatcher\n");
if (!process.dispatch(rqstp, statp))
goto release_dropit; /* Release reply info */
}
+ if (rqstp->rq_auth_stat != rpc_auth_ok)
+ goto err_release_bad_auth;
+
/* Check RPC status result */
if (*statp != rpc_success)
resv->iov_len = ((void*)statp) - resv->iov_base + 4;
@@ -1425,7 +1410,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
svc_authorise(rqstp);
close_xprt:
if (rqstp->rq_xprt && test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags))
- svc_close_xprt(rqstp->rq_xprt);
+ svc_xprt_close(rqstp->rq_xprt);
dprintk("svc: svc_process close\n");
return 0;
@@ -1446,13 +1431,14 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv)
if (procp->pc_release)
procp->pc_release(rqstp);
err_bad_auth:
- dprintk("svc: authentication failed (%d)\n", ntohl(auth_stat));
+ dprintk("svc: authentication failed (%d)\n",
+ be32_to_cpu(rqstp->rq_auth_stat));
serv->sv_stats->rpcbadauth++;
/* Restore write pointer to location of accept status: */
xdr_ressize_check(rqstp, reply_statp);
svc_putnl(resv, 1); /* REJECT */
svc_putnl(resv, 1); /* AUTH_ERROR */
- svc_putnl(resv, ntohl(auth_stat)); /* status */
+ svc_putu32(resv, rqstp->rq_auth_stat); /* status */
goto sendit;
err_bad_prog:
@@ -1626,7 +1612,7 @@ u32 svc_max_payload(const struct svc_rqst *rqstp)
EXPORT_SYMBOL_GPL(svc_max_payload);
/**
- * svc_encode_read_payload - mark a range of bytes as a READ payload
+ * svc_encode_result_payload - mark a range of bytes as a result payload
* @rqstp: svc_rqst to operate on
* @offset: payload's byte offset in rqstp->rq_res
* @length: size of payload, in bytes
@@ -1634,26 +1620,28 @@ EXPORT_SYMBOL_GPL(svc_max_payload);
* Returns zero on success, or a negative errno if a permanent
* error occurred.
*/
-int svc_encode_read_payload(struct svc_rqst *rqstp, unsigned int offset,
- unsigned int length)
+int svc_encode_result_payload(struct svc_rqst *rqstp, unsigned int offset,
+ unsigned int length)
{
- return rqstp->rq_xprt->xpt_ops->xpo_read_payload(rqstp, offset, length);
+ return rqstp->rq_xprt->xpt_ops->xpo_result_payload(rqstp, offset,
+ length);
}
-EXPORT_SYMBOL_GPL(svc_encode_read_payload);
+EXPORT_SYMBOL_GPL(svc_encode_result_payload);
/**
* svc_fill_write_vector - Construct data argument for VFS write call
* @rqstp: svc_rqst to operate on
- * @pages: list of pages containing data payload
- * @first: buffer containing first section of write payload
- * @total: total number of bytes of write payload
+ * @payload: xdr_buf containing only the write data payload
*
* Fills in rqstp::rq_vec, and returns the number of elements.
*/
-unsigned int svc_fill_write_vector(struct svc_rqst *rqstp, struct page **pages,
- struct kvec *first, size_t total)
+unsigned int svc_fill_write_vector(struct svc_rqst *rqstp,
+ struct xdr_buf *payload)
{
+ struct page **pages = payload->pages;
+ struct kvec *first = payload->head;
struct kvec *vec = rqstp->rq_vec;
+ size_t total = payload->len;
unsigned int i;
/* Some types of transport can present the write payload
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 06e503466c32..d1eacf3358b8 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -233,30 +233,35 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl,
return xprt;
}
-/*
- * svc_xprt_received conditionally queues the transport for processing
- * by another thread. The caller must hold the XPT_BUSY bit and must
+/**
+ * svc_xprt_received - start next receiver thread
+ * @xprt: controlling transport
+ *
+ * The caller must hold the XPT_BUSY bit and must
* not thereafter touch transport data.
*
* Note: XPT_DATA only gets cleared when a read-attempt finds no (or
* insufficient) data.
*/
-static void svc_xprt_received(struct svc_xprt *xprt)
+void svc_xprt_received(struct svc_xprt *xprt)
{
if (!test_bit(XPT_BUSY, &xprt->xpt_flags)) {
WARN_ONCE(1, "xprt=0x%p already busy!", xprt);
return;
}
+ trace_svc_xprt_received(xprt);
+
/* As soon as we clear busy, the xprt could be closed and
- * 'put', so we need a reference to call svc_enqueue_xprt with:
+ * 'put', so we need a reference to call svc_xprt_enqueue with:
*/
svc_xprt_get(xprt);
smp_mb__before_atomic();
clear_bit(XPT_BUSY, &xprt->xpt_flags);
- xprt->xpt_server->sv_ops->svo_enqueue_xprt(xprt);
+ svc_xprt_enqueue(xprt);
svc_xprt_put(xprt);
}
+EXPORT_SYMBOL_GPL(svc_xprt_received);
void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *new)
{
@@ -267,7 +272,7 @@ void svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *new)
svc_xprt_received(new);
}
-static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
+static int _svc_xprt_create(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags,
const struct cred *cred)
@@ -303,21 +308,35 @@ static int _svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
return -EPROTONOSUPPORT;
}
-int svc_create_xprt(struct svc_serv *serv, const char *xprt_name,
+/**
+ * svc_xprt_create - Add a new listener to @serv
+ * @serv: target RPC service
+ * @xprt_name: transport class name
+ * @net: network namespace
+ * @family: network address family
+ * @port: listener port
+ * @flags: SVC_SOCK flags
+ * @cred: credential to bind to this transport
+ *
+ * Return values:
+ * %0: New listener added successfully
+ * %-EPROTONOSUPPORT: Requested transport type not supported
+ */
+int svc_xprt_create(struct svc_serv *serv, const char *xprt_name,
struct net *net, const int family,
const unsigned short port, int flags,
const struct cred *cred)
{
int err;
- err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred);
+ err = _svc_xprt_create(serv, xprt_name, net, family, port, flags, cred);
if (err == -EPROTONOSUPPORT) {
request_module("svc%s", xprt_name);
- err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred);
+ err = _svc_xprt_create(serv, xprt_name, net, family, port, flags, cred);
}
return err;
}
-EXPORT_SYMBOL_GPL(svc_create_xprt);
+EXPORT_SYMBOL_GPL(svc_xprt_create);
/*
* Copy the local and remote xprt addresses to the rqstp structure
@@ -393,6 +412,8 @@ static bool svc_xprt_ready(struct svc_xprt *xprt)
smp_rmb();
xpt_flags = READ_ONCE(xprt->xpt_flags);
+ if (xpt_flags & BIT(XPT_BUSY))
+ return false;
if (xpt_flags & (BIT(XPT_CONN) | BIT(XPT_CLOSE)))
return true;
if (xpt_flags & (BIT(XPT_DATA) | BIT(XPT_DEFERRED))) {
@@ -405,7 +426,12 @@ static bool svc_xprt_ready(struct svc_xprt *xprt)
return false;
}
-void svc_xprt_do_enqueue(struct svc_xprt *xprt)
+/**
+ * svc_xprt_enqueue - Queue a transport on an idle nfsd thread
+ * @xprt: transport with data pending
+ *
+ */
+void svc_xprt_enqueue(struct svc_xprt *xprt)
{
struct svc_pool *pool;
struct svc_rqst *rqstp = NULL;
@@ -449,19 +475,6 @@ void svc_xprt_do_enqueue(struct svc_xprt *xprt)
put_cpu();
trace_svc_xprt_do_enqueue(xprt, rqstp);
}
-EXPORT_SYMBOL_GPL(svc_xprt_do_enqueue);
-
-/*
- * Queue up a transport with data pending. If there are idle nfsd
- * processes, wake 'em up.
- *
- */
-void svc_xprt_enqueue(struct svc_xprt *xprt)
-{
- if (test_bit(XPT_BUSY, &xprt->xpt_flags))
- return;
- xprt->xpt_server->sv_ops->svo_enqueue_xprt(xprt);
-}
EXPORT_SYMBOL_GPL(svc_xprt_enqueue);
/*
@@ -520,6 +533,7 @@ static void svc_xprt_release(struct svc_rqst *rqstp)
kfree(rqstp->rq_deferred);
rqstp->rq_deferred = NULL;
+ pagevec_release(&rqstp->rq_pvec);
svc_free_res_pages(rqstp);
rqstp->rq_res.page_len = 0;
rqstp->rq_res.page_base = 0;
@@ -646,6 +660,8 @@ static int svc_alloc_arg(struct svc_rqst *rqstp)
int pages;
int i;
+ pagevec_init(&rqstp->rq_pvec);
+
/* now allocate needed pages. If we get a failure, sleep briefly */
pages = (serv->sv_max_mesg + 2 * PAGE_SIZE) >> PAGE_SHIFT;
if (pages > RPCSVC_MAXPAGES) {
@@ -658,13 +674,13 @@ static int svc_alloc_arg(struct svc_rqst *rqstp)
while (rqstp->rq_pages[i] == NULL) {
struct page *p = alloc_page(GFP_KERNEL);
if (!p) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (signalled() || kthread_should_stop()) {
+ set_current_state(TASK_IDLE);
+ if (kthread_should_stop()) {
set_current_state(TASK_RUNNING);
return -EINTR;
}
- schedule_timeout(msecs_to_jiffies(500));
}
+ freezable_schedule_timeout(msecs_to_jiffies(500));
rqstp->rq_pages[i] = p;
}
rqstp->rq_page_end = &rqstp->rq_pages[i];
@@ -697,7 +713,7 @@ rqst_should_sleep(struct svc_rqst *rqstp)
return false;
/* are we shutting down? */
- if (signalled() || kthread_should_stop())
+ if (kthread_should_stop())
return false;
/* are we freezing? */
@@ -719,18 +735,14 @@ static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
if (rqstp->rq_xprt)
goto out_found;
- /*
- * We have to be able to interrupt this wait
- * to bring down the daemons ...
- */
- set_current_state(TASK_INTERRUPTIBLE);
+ set_current_state(TASK_IDLE);
smp_mb__before_atomic();
clear_bit(SP_CONGESTED, &pool->sp_flags);
clear_bit(RQ_BUSY, &rqstp->rq_flags);
smp_mb__after_atomic();
if (likely(rqst_should_sleep(rqstp)))
- time_left = schedule_timeout(timeout);
+ time_left = freezable_schedule_timeout(timeout);
else
__set_current_state(TASK_RUNNING);
@@ -745,7 +757,7 @@ static struct svc_xprt *svc_get_next_xprt(struct svc_rqst *rqstp, long timeout)
if (!time_left)
atomic_long_inc(&pool->sp_stats.threads_timedout);
- if (signalled() || kthread_should_stop())
+ if (kthread_should_stop())
return ERR_PTR(-EINTR);
return ERR_PTR(-EAGAIN);
out_found:
@@ -844,7 +856,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
try_to_freeze();
cond_resched();
err = -EINTR;
- if (signalled() || kthread_should_stop())
+ if (kthread_should_stop())
goto out;
xprt = svc_get_next_xprt(rqstp, timeout);
@@ -1040,7 +1052,12 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
svc_xprt_put(xprt);
}
-void svc_close_xprt(struct svc_xprt *xprt)
+/**
+ * svc_xprt_close - Close a client connection
+ * @xprt: transport to disconnect
+ *
+ */
+void svc_xprt_close(struct svc_xprt *xprt)
{
trace_svc_xprt_close(xprt);
set_bit(XPT_CLOSE, &xprt->xpt_flags);
@@ -1055,7 +1072,7 @@ void svc_close_xprt(struct svc_xprt *xprt)
*/
svc_delete_xprt(xprt);
}
-EXPORT_SYMBOL_GPL(svc_close_xprt);
+EXPORT_SYMBOL_GPL(svc_xprt_close);
static int svc_close_list(struct svc_serv *serv, struct list_head *xprt_list, struct net *net)
{
@@ -1107,7 +1124,11 @@ static void svc_clean_up_xprts(struct svc_serv *serv, struct net *net)
}
}
-/*
+/**
+ * svc_xprt_destroy_all - Destroy transports associated with @serv
+ * @serv: RPC service to be shut down
+ * @net: target network namespace
+ *
* Server threads may still be running (especially in the case where the
* service is still running in other network namespaces).
*
@@ -1119,7 +1140,7 @@ static void svc_clean_up_xprts(struct svc_serv *serv, struct net *net)
* threads, we may need to wait a little while and then check again to
* see if they're done.
*/
-void svc_close_net(struct svc_serv *serv, struct net *net)
+void svc_xprt_destroy_all(struct svc_serv *serv, struct net *net)
{
int delay = 0;
@@ -1130,6 +1151,7 @@ void svc_close_net(struct svc_serv *serv, struct net *net)
msleep(delay++);
}
}
+EXPORT_SYMBOL_GPL(svc_xprt_destroy_all);
/*
* Handle defer and revisit of requests
diff --git a/net/sunrpc/svcauth.c b/net/sunrpc/svcauth.c
index 998b196b6176..5a8b8e03fdd4 100644
--- a/net/sunrpc/svcauth.c
+++ b/net/sunrpc/svcauth.c
@@ -59,12 +59,12 @@ svc_put_auth_ops(struct auth_ops *aops)
}
int
-svc_authenticate(struct svc_rqst *rqstp, __be32 *authp)
+svc_authenticate(struct svc_rqst *rqstp)
{
rpc_authflavor_t flavor;
struct auth_ops *aops;
- *authp = rpc_auth_ok;
+ rqstp->rq_auth_stat = rpc_auth_ok;
flavor = svc_getnl(&rqstp->rq_arg.head[0]);
@@ -72,7 +72,7 @@ svc_authenticate(struct svc_rqst *rqstp, __be32 *authp)
aops = svc_get_auth_ops(flavor);
if (aops == NULL) {
- *authp = rpc_autherr_badcred;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
return SVC_DENIED;
}
@@ -80,7 +80,7 @@ svc_authenticate(struct svc_rqst *rqstp, __be32 *authp)
init_svc_cred(&rqstp->rq_cred);
rqstp->rq_authop = aops;
- return aops->accept(rqstp, authp);
+ return aops->accept(rqstp);
}
EXPORT_SYMBOL_GPL(svc_authenticate);
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 60754a292589..1868596259af 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -699,8 +699,9 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
rqstp->rq_client = NULL;
if (rqstp->rq_proc == 0)
- return SVC_OK;
+ goto out;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
ipm = ip_map_cached_get(xprt);
if (ipm == NULL)
ipm = __ip_map_lookup(sn->ip_map_cache, rqstp->rq_server->sv_program->pg_class,
@@ -737,13 +738,16 @@ svcauth_unix_set_client(struct svc_rqst *rqstp)
put_group_info(cred->cr_group_info);
cred->cr_group_info = gi;
}
+
+out:
+ rqstp->rq_auth_stat = rpc_auth_ok;
return SVC_OK;
}
EXPORT_SYMBOL_GPL(svcauth_unix_set_client);
static int
-svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
+svcauth_null_accept(struct svc_rqst *rqstp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
@@ -754,12 +758,12 @@ svcauth_null_accept(struct svc_rqst *rqstp, __be32 *authp)
if (svc_getu32(argv) != 0) {
dprintk("svc: bad null cred\n");
- *authp = rpc_autherr_badcred;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
return SVC_DENIED;
}
if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
dprintk("svc: bad null verf\n");
- *authp = rpc_autherr_badverf;
+ rqstp->rq_auth_stat = rpc_autherr_badverf;
return SVC_DENIED;
}
@@ -803,7 +807,7 @@ struct auth_ops svcauth_null = {
static int
-svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
+svcauth_unix_accept(struct svc_rqst *rqstp)
{
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
@@ -845,7 +849,7 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
}
groups_sort(cred->cr_group_info);
if (svc_getu32(argv) != htonl(RPC_AUTH_NULL) || svc_getu32(argv) != 0) {
- *authp = rpc_autherr_badverf;
+ rqstp->rq_auth_stat = rpc_autherr_badverf;
return SVC_DENIED;
}
@@ -857,7 +861,7 @@ svcauth_unix_accept(struct svc_rqst *rqstp, __be32 *authp)
return SVC_OK;
badcred:
- *authp = rpc_autherr_badcred;
+ rqstp->rq_auth_stat = rpc_autherr_badcred;
return SVC_DENIED;
}
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 3d5ee042c501..cb0cfcd8a814 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -181,8 +181,8 @@ static void svc_set_cmsg_data(struct svc_rqst *rqstp, struct cmsghdr *cmh)
}
}
-static int svc_sock_read_payload(struct svc_rqst *rqstp, unsigned int offset,
- unsigned int length)
+static int svc_sock_result_payload(struct svc_rqst *rqstp, unsigned int offset,
+ unsigned int length)
{
return 0;
}
@@ -635,7 +635,7 @@ static const struct svc_xprt_ops svc_udp_ops = {
.xpo_create = svc_udp_create,
.xpo_recvfrom = svc_udp_recvfrom,
.xpo_sendto = svc_udp_sendto,
- .xpo_read_payload = svc_sock_read_payload,
+ .xpo_result_payload = svc_sock_result_payload,
.xpo_release_rqst = svc_udp_release_rqst,
.xpo_detach = svc_sock_detach,
.xpo_free = svc_sock_free,
@@ -1209,7 +1209,7 @@ static const struct svc_xprt_ops svc_tcp_ops = {
.xpo_create = svc_tcp_create,
.xpo_recvfrom = svc_tcp_recvfrom,
.xpo_sendto = svc_tcp_sendto,
- .xpo_read_payload = svc_sock_read_payload,
+ .xpo_result_payload = svc_sock_result_payload,
.xpo_release_rqst = svc_tcp_release_rqst,
.xpo_detach = svc_tcp_sock_detach,
.xpo_free = svc_sock_free,
@@ -1342,25 +1342,10 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv,
return svsk;
}
-bool svc_alien_sock(struct net *net, int fd)
-{
- int err;
- struct socket *sock = sockfd_lookup(fd, &err);
- bool ret = false;
-
- if (!sock)
- goto out;
- if (sock_net(sock->sk) != net)
- ret = true;
- sockfd_put(sock);
-out:
- return ret;
-}
-EXPORT_SYMBOL_GPL(svc_alien_sock);
-
/**
* svc_addsock - add a listener socket to an RPC service
* @serv: pointer to RPC service to which to add a new listener
+ * @net: caller's network namespace
* @fd: file descriptor of the new listener
* @name_return: pointer to buffer to fill in with name of listener
* @len: size of the buffer
@@ -1370,8 +1355,8 @@ EXPORT_SYMBOL_GPL(svc_alien_sock);
* Name is terminated with '\n'. On error, returns a negative errno
* value.
*/
-int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
- const size_t len, const struct cred *cred)
+int svc_addsock(struct svc_serv *serv, struct net *net, const int fd,
+ char *name_return, const size_t len, const struct cred *cred)
{
int err = 0;
struct socket *so = sockfd_lookup(fd, &err);
@@ -1382,6 +1367,9 @@ int svc_addsock(struct svc_serv *serv, const int fd, char *name_return,
if (!so)
return err;
+ err = -EINVAL;
+ if (sock_net(so->sk) != net)
+ goto out;
err = -EAFNOSUPPORT;
if ((so->sk->sk_family != PF_INET) && (so->sk->sk_family != PF_INET6))
goto out;
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index d84bb5037bb5..e2bd0cd39114 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -669,7 +669,7 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p,
struct kvec *iov = buf->head;
int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;
- xdr_set_scratch_buffer(xdr, NULL, 0);
+ xdr_reset_scratch_buffer(xdr);
BUG_ON(scratch_len < 0);
xdr->buf = buf;
xdr->iov = iov;
@@ -691,7 +691,29 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p,
EXPORT_SYMBOL_GPL(xdr_init_encode);
/**
- * xdr_commit_encode - Ensure all data is written to buffer
+ * xdr_init_encode_pages - Initialize an xdr_stream for encoding into pages
+ * @xdr: pointer to xdr_stream struct
+ * @buf: pointer to XDR buffer into which to encode data
+ * @pages: list of pages to decode into
+ * @rqst: pointer to controlling rpc_rqst, for debugging
+ *
+ */
+void xdr_init_encode_pages(struct xdr_stream *xdr, struct xdr_buf *buf,
+ struct page **pages, struct rpc_rqst *rqst)
+{
+ xdr_reset_scratch_buffer(xdr);
+
+ xdr->buf = buf;
+ xdr->page_ptr = pages;
+ xdr->iov = NULL;
+ xdr->p = page_address(*pages);
+ xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
+ xdr->rqst = rqst;
+}
+EXPORT_SYMBOL_GPL(xdr_init_encode_pages);
+
+/**
+ * __xdr_commit_encode - Ensure all data is written to buffer
* @xdr: pointer to xdr_stream
*
* We handle encoding across page boundaries by giving the caller a
@@ -703,22 +725,25 @@ EXPORT_SYMBOL_GPL(xdr_init_encode);
* required at the end of encoding, or any other time when the xdr_buf
* data might be read.
*/
-inline void xdr_commit_encode(struct xdr_stream *xdr)
+void __xdr_commit_encode(struct xdr_stream *xdr)
{
int shift = xdr->scratch.iov_len;
void *page;
- if (shift == 0)
- return;
page = page_address(*xdr->page_ptr);
memcpy(xdr->scratch.iov_base, page, shift);
memmove(page, page + shift, (void *)xdr->p - page);
- xdr->scratch.iov_len = 0;
+ xdr_reset_scratch_buffer(xdr);
}
-EXPORT_SYMBOL_GPL(xdr_commit_encode);
+EXPORT_SYMBOL_GPL(__xdr_commit_encode);
-static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
- size_t nbytes)
+/*
+ * The buffer space to be reserved crosses the boundary between
+ * xdr->buf->head and xdr->buf->pages, or between two pages
+ * in xdr->buf->pages.
+ */
+static noinline __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
+ size_t nbytes)
{
__be32 *p;
int space_left;
@@ -743,8 +768,7 @@ static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
* the "scratch" iov to track any temporarily unused fragment of
* space at the end of the previous buffer:
*/
- xdr->scratch.iov_base = xdr->p;
- xdr->scratch.iov_len = frag1bytes;
+ xdr_set_scratch_buffer(xdr, xdr->p, frag1bytes);
p = page_address(*xdr->page_ptr);
/*
* Note this is where the next encode will start after we've
@@ -1056,8 +1080,7 @@ void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p,
struct rpc_rqst *rqst)
{
xdr->buf = buf;
- xdr->scratch.iov_base = NULL;
- xdr->scratch.iov_len = 0;
+ xdr_reset_scratch_buffer(xdr);
xdr->nwords = XDR_QUADLEN(buf->len);
if (buf->head[0].iov_len != 0)
xdr_set_iov(xdr, buf->head, buf->len);
@@ -1105,24 +1128,6 @@ static __be32 * __xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
return p;
}
-/**
- * xdr_set_scratch_buffer - Attach a scratch buffer for decoding data.
- * @xdr: pointer to xdr_stream struct
- * @buf: pointer to an empty buffer
- * @buflen: size of 'buf'
- *
- * The scratch buffer is used when decoding from an array of pages.
- * If an xdr_inline_decode() call spans across page boundaries, then
- * we copy the data into the scratch buffer in order to allow linear
- * access.
- */
-void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen)
-{
- xdr->scratch.iov_base = buf;
- xdr->scratch.iov_len = buflen;
-}
-EXPORT_SYMBOL_GPL(xdr_set_scratch_buffer);
-
static __be32 *xdr_copy_to_scratch(struct xdr_stream *xdr, size_t nbytes)
{
__be32 *p;
@@ -1432,6 +1437,51 @@ xdr_buf_subsegment(struct xdr_buf *buf, struct xdr_buf *subbuf,
}
EXPORT_SYMBOL_GPL(xdr_buf_subsegment);
+/**
+ * xdr_stream_subsegment - set @subbuf to a portion of @xdr
+ * @xdr: an xdr_stream set up for decoding
+ * @subbuf: the result buffer
+ * @nbytes: length of @xdr to extract, in bytes
+ *
+ * Sets up @subbuf to represent a portion of @xdr. The portion
+ * starts at the current offset in @xdr, and extends for a length
+ * of @nbytes. If this is successful, @xdr is advanced to the next
+ * position following that portion.
+ *
+ * Return values:
+ * %true: @subbuf has been initialized, and @xdr has been advanced.
+ * %false: a bounds error has occurred
+ */
+bool xdr_stream_subsegment(struct xdr_stream *xdr, struct xdr_buf *subbuf,
+ unsigned int nbytes)
+{
+ unsigned int remaining, offset, len;
+
+ if (xdr_buf_subsegment(xdr->buf, subbuf, xdr_stream_pos(xdr), nbytes))
+ return false;
+
+ if (subbuf->head[0].iov_len)
+ if (!__xdr_inline_decode(xdr, subbuf->head[0].iov_len))
+ return false;
+
+ remaining = subbuf->page_len;
+ offset = subbuf->page_base;
+ while (remaining) {
+ len = min_t(unsigned int, remaining, PAGE_SIZE) - offset;
+
+ if (xdr->p == xdr->end && !xdr_set_next_buffer(xdr))
+ return false;
+ if (!__xdr_inline_decode(xdr, len))
+ return false;
+
+ remaining -= len;
+ offset = 0;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(xdr_stream_subsegment);
+
/**
* xdr_buf_trim - lop at most "len" bytes off the end of "buf"
* @buf: buf to be trimmed
diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
index c5154bc38e12..feac8c26fb87 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
@@ -186,7 +186,7 @@ static int xprt_rdma_bc_send_request(struct rpc_rqst *rqst)
ret = rpcrdma_bc_send_request(rdma, rqst);
if (ret == -ENOTCONN)
- svc_close_xprt(sxprt);
+ svc_xprt_close(sxprt);
return ret;
}
diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index c3d588b149aa..d6436c13d5c4 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -448,7 +448,6 @@ static ssize_t svc_rdma_encode_write_chunk(__be32 *src,
* svc_rdma_encode_write_list - Encode RPC Reply's Write chunk list
* @rctxt: Reply context with information about the RPC Call
* @sctxt: Send context for the RPC Reply
- * @length: size in bytes of the payload in the first Write chunk
*
* The client provides a Write chunk list in the Call message. Fill
* in the segments in the first Write chunk in the Reply's transport
@@ -465,12 +464,12 @@ static ssize_t svc_rdma_encode_write_chunk(__be32 *src,
*/
static ssize_t
svc_rdma_encode_write_list(const struct svc_rdma_recv_ctxt *rctxt,
- struct svc_rdma_send_ctxt *sctxt,
- unsigned int length)
+ struct svc_rdma_send_ctxt *sctxt)
{
ssize_t len, ret;
- ret = svc_rdma_encode_write_chunk(rctxt->rc_write_list, sctxt, length);
+ ret = svc_rdma_encode_write_chunk(rctxt->rc_write_list, sctxt,
+ rctxt->rc_read_payload_length);
if (ret < 0)
return ret;
len = ret;
@@ -923,21 +922,12 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
goto err0;
if (wr_lst) {
/* XXX: Presume the client sent only one Write chunk */
- unsigned long offset;
- unsigned int length;
-
- if (rctxt->rc_read_payload_length) {
- offset = rctxt->rc_read_payload_offset;
- length = rctxt->rc_read_payload_length;
- } else {
- offset = xdr->head[0].iov_len;
- length = xdr->page_len;
- }
- ret = svc_rdma_send_write_chunk(rdma, wr_lst, xdr, offset,
- length);
+ ret = svc_rdma_send_write_chunk(rdma, wr_lst, xdr,
+ rctxt->rc_read_payload_offset,
+ rctxt->rc_read_payload_length);
if (ret < 0)
goto err2;
- if (svc_rdma_encode_write_list(rctxt, sctxt, length) < 0)
+ if (svc_rdma_encode_write_list(rctxt, sctxt) < 0)
goto err0;
} else {
if (xdr_stream_encode_item_absent(&sctxt->sc_stream) < 0)
@@ -979,19 +969,19 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
}
/**
- * svc_rdma_read_payload - special processing for a READ payload
+ * svc_rdma_result_payload - special processing for a result payload
* @rqstp: svc_rqst to operate on
* @offset: payload's byte offset in @xdr
* @length: size of payload, in bytes
*
* Returns zero on success.
*
- * For the moment, just record the xdr_buf location of the READ
+ * For the moment, just record the xdr_buf location of the result
* payload. svc_rdma_sendto will use that location later when
* we actually send the payload.
*/
-int svc_rdma_read_payload(struct svc_rqst *rqstp, unsigned int offset,
- unsigned int length)
+int svc_rdma_result_payload(struct svc_rqst *rqstp, unsigned int offset,
+ unsigned int length)
{
struct svc_rdma_recv_ctxt *rctxt = rqstp->rq_xprt_ctxt;
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 5f7e3d12523f..c895f80df659 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -80,7 +80,7 @@ static const struct svc_xprt_ops svc_rdma_ops = {
.xpo_create = svc_rdma_create,
.xpo_recvfrom = svc_rdma_recvfrom,
.xpo_sendto = svc_rdma_sendto,
- .xpo_read_payload = svc_rdma_read_payload,
+ .xpo_result_payload = svc_rdma_result_payload,
.xpo_release_rqst = svc_rdma_release_rqst,
.xpo_detach = svc_rdma_detach,
.xpo_free = svc_rdma_free,
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3ab726a668e8..405bf3e6eb79 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -959,7 +959,7 @@ static struct sock *unix_find_other(struct net *net,
if (err)
goto fail;
inode = d_backing_inode(path.dentry);
- err = inode_permission(inode, MAY_WRITE);
+ err = path_permission(&path, MAY_WRITE);
if (err)
goto put_fail;
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 059b78d08f7a..0506a48f124c 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -168,8 +168,9 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
"panic",
"do_exit",
"do_task_dead",
+ "kthread_exit",
"make_task_dead",
- "__module_put_and_exit",
+ "__module_put_and_kthread_exit",
"complete_and_exit",
"__reiserfs_panic",
"lbug_with_loc",
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