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Date: Wed, 25 Apr 2007 16:50:19 +0100
From: David Howells <dhowells@...hat.com>
To: torvalds@...l.org, akpm@...l.org
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
netdev@...r.kernel.org, dhowells@...hat.com
Subject: [PATCH 16/16] AFS: Add "directory write" support [try #4]
Add support for the create, link, symlink, unlink, mkdir, rmdir and rename VFS
operations to the in-kernel AFS filesystem.
Also:
(1) Fix dentry and inode revalidation. d_revalidate should only look at
state of the dentry. Revalidation of the contents of an inode pointed to
by a dentry is now separate.
(2) Fix afs_lookup() to hash negative dentries as well as positive ones.
Signed-Off-By: David Howells <dhowells@...hat.com>
---
fs/afs/afs.h | 26 ++
fs/afs/afs_fs.h | 11 +
fs/afs/callback.c | 36 +++
fs/afs/dir.c | 676 ++++++++++++++++++++++++++++++++++++++++++-----------
fs/afs/file.c | 7 +
fs/afs/fsclient.c | 625 +++++++++++++++++++++++++++++++++++++++++++++----
fs/afs/inode.c | 115 ++++++++-
fs/afs/internal.h | 54 ++++
fs/afs/misc.c | 21 ++
fs/afs/security.c | 31 ++
fs/afs/server.c | 2
fs/afs/super.c | 6
fs/afs/vnode.c | 422 +++++++++++++++++++++++++++++++--
fs/afs/volume.c | 14 +
14 files changed, 1778 insertions(+), 268 deletions(-)
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index 3f255d6..085cf60 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -106,19 +106,37 @@ struct afs_file_status {
afs_file_type_t type; /* file type */
unsigned nlink; /* link count */
- size_t size; /* file size */
+ u64 size; /* file size */
afs_dataversion_t data_version; /* current data version */
- unsigned author; /* author ID */
- unsigned owner; /* owner ID */
+ u32 author; /* author ID */
+ u32 owner; /* owner ID */
+ u32 group; /* group ID */
afs_access_t caller_access; /* access rights for authenticated caller */
afs_access_t anon_access; /* access rights for unauthenticated caller */
umode_t mode; /* UNIX mode */
- struct afs_fid parent; /* parent file ID */
+ struct afs_fid parent; /* parent dir ID for non-dirs only */
time_t mtime_client; /* last time client changed data */
time_t mtime_server; /* last time server changed data */
};
/*
+ * AFS file status change request
+ */
+struct afs_store_status {
+ u32 mask; /* which bits of the struct are set */
+ u32 mtime_client; /* last time client changed data */
+ u32 owner; /* owner ID */
+ u32 group; /* group ID */
+ umode_t mode; /* UNIX mode */
+};
+
+#define AFS_SET_MTIME 0x01 /* set the mtime */
+#define AFS_SET_OWNER 0x02 /* set the owner ID */
+#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
+#define AFS_SET_MODE 0x08 /* set the UNIX mode */
+#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
+
+/*
* AFS volume synchronisation information
*/
struct afs_volsync {
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h
index fd38595..89e0d16 100644
--- a/fs/afs/afs_fs.h
+++ b/fs/afs/afs_fs.h
@@ -16,12 +16,19 @@
#define FS_SERVICE 1 /* AFS File Service ID */
enum AFS_FS_Operations {
- FSFETCHSTATUS = 132, /* AFS Fetch file status */
FSFETCHDATA = 130, /* AFS Fetch file data */
+ FSFETCHSTATUS = 132, /* AFS Fetch file status */
+ FSREMOVEFILE = 136, /* AFS Remove a file */
+ FSCREATEFILE = 137, /* AFS Create a file */
+ FSRENAME = 138, /* AFS Rename or move a file or directory */
+ FSSYMLINK = 139, /* AFS Create a symbolic link */
+ FSLINK = 140, /* AFS Create a hard link */
+ FSMAKEDIR = 141, /* AFS Create a directory */
+ FSREMOVEDIR = 142, /* AFS Remove a directory */
FSGIVEUPCALLBACKS = 147, /* AFS Discard callback promises */
FSGETVOLUMEINFO = 148, /* AFS Get root volume information */
FSGETROOTVOLUME = 151, /* AFS Get root volume name */
- FSLOOKUP = 161 /* AFS lookup file in directory */
+ FSLOOKUP = 161, /* AFS lookup file in directory */
};
enum AFS_FS_Errors {
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index e674beb..639399f 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -44,7 +44,8 @@ void afs_init_callback_state(struct afs_server *server)
while (!RB_EMPTY_ROOT(&server->cb_promises)) {
vnode = rb_entry(server->cb_promises.rb_node,
struct afs_vnode, cb_promise);
- printk("\nUNPROMISE on %p\n", vnode);
+ _debug("UNPROMISE { vid=%x vn=%u uq=%u}",
+ vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
rb_erase(&vnode->cb_promise, &server->cb_promises);
vnode->cb_promised = false;
}
@@ -68,7 +69,7 @@ void afs_broken_callback_work(struct work_struct *work)
/* we're only interested in dealing with a broken callback on *this*
* vnode and only if no-one else has dealt with it yet */
- if (!mutex_trylock(&vnode->cb_broken_lock))
+ if (!mutex_trylock(&vnode->validate_lock))
return; /* someone else is dealing with it */
if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
@@ -84,13 +85,14 @@ void afs_broken_callback_work(struct work_struct *work)
/* if the vnode's data version number changed then its contents
* are different */
if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
- _debug("zap data");
+ _debug("zap data {%x:%u}",
+ vnode->fid.vid, vnode->fid.vnode);
invalidate_remote_inode(&vnode->vfs_inode);
}
}
out:
- mutex_unlock(&vnode->cb_broken_lock);
+ mutex_unlock(&vnode->validate_lock);
/* avoid the potential race whereby the mutex_trylock() in this
* function happens again between the clear_bit() and the
@@ -252,6 +254,32 @@ static void afs_do_give_up_callback(struct afs_server *server,
}
/*
+ * discard the callback on a deleted item
+ */
+void afs_discard_callback_on_delete(struct afs_vnode *vnode)
+{
+ struct afs_server *server = vnode->server;
+
+ _enter("%d", vnode->cb_promised);
+
+ if (!vnode->cb_promised) {
+ _leave(" [not promised]");
+ return;
+ }
+
+ ASSERT(server != NULL);
+
+ spin_lock(&server->cb_lock);
+ if (vnode->cb_promised) {
+ ASSERT(server->cb_promises.rb_node != NULL);
+ rb_erase(&vnode->cb_promise, &server->cb_promises);
+ vnode->cb_promised = false;
+ }
+ spin_unlock(&server->cb_lock);
+ _leave("");
+}
+
+/*
* give up the callback registered for a vnode on the file server when the
* inode is being cleared
*/
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 8736841..dbbe75d 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -18,40 +18,50 @@
#include <linux/ctype.h>
#include "internal.h"
-static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd);
+static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd);
static int afs_dir_open(struct inode *inode, struct file *file);
-static int afs_dir_readdir(struct file *file, void *dirent, filldir_t filldir);
+static int afs_readdir(struct file *file, void *dirent, filldir_t filldir);
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd);
static int afs_d_delete(struct dentry *dentry);
-static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
+static void afs_d_release(struct dentry *dentry);
+static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
loff_t fpos, u64 ino, unsigned dtype);
+static int afs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd);
+static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+static int afs_rmdir(struct inode *dir, struct dentry *dentry);
+static int afs_unlink(struct inode *dir, struct dentry *dentry);
+static int afs_link(struct dentry *from, struct inode *dir,
+ struct dentry *dentry);
+static int afs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *content);
+static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry);
const struct file_operations afs_dir_file_operations = {
.open = afs_dir_open,
.release = afs_release,
- .readdir = afs_dir_readdir,
+ .readdir = afs_readdir,
};
const struct inode_operations afs_dir_inode_operations = {
- .lookup = afs_dir_lookup,
+ .create = afs_create,
+ .lookup = afs_lookup,
+ .link = afs_link,
+ .unlink = afs_unlink,
+ .symlink = afs_symlink,
+ .mkdir = afs_mkdir,
+ .rmdir = afs_rmdir,
+ .rename = afs_rename,
.permission = afs_permission,
.getattr = afs_inode_getattr,
-#if 0 /* TODO */
- .create = afs_dir_create,
- .link = afs_dir_link,
- .unlink = afs_dir_unlink,
- .symlink = afs_dir_symlink,
- .mkdir = afs_dir_mkdir,
- .rmdir = afs_dir_rmdir,
- .mknod = afs_dir_mknod,
- .rename = afs_dir_rename,
-#endif
};
static struct dentry_operations afs_fs_dentry_operations = {
.d_revalidate = afs_d_revalidate,
.d_delete = afs_d_delete,
+ .d_release = afs_d_release,
};
#define AFS_DIR_HASHTBL_SIZE 128
@@ -103,7 +113,7 @@ struct afs_dir_page {
union afs_dir_block blocks[PAGE_SIZE / sizeof(union afs_dir_block)];
};
-struct afs_dir_lookup_cookie {
+struct afs_lookup_cookie {
struct afs_fid fid;
const char *name;
size_t nlen;
@@ -299,7 +309,7 @@ static int afs_dir_iterate_block(unsigned *fpos,
nlen,
blkoff + offset * sizeof(union afs_dirent),
ntohl(dire->u.vnode),
- filldir == afs_dir_lookup_filldir ?
+ filldir == afs_lookup_filldir ?
ntohl(dire->u.unique) : DT_UNKNOWN);
if (ret < 0) {
_leave(" = 0 [full]");
@@ -379,7 +389,7 @@ out:
/*
* read an AFS directory
*/
-static int afs_dir_readdir(struct file *file, void *cookie, filldir_t filldir)
+static int afs_readdir(struct file *file, void *cookie, filldir_t filldir)
{
unsigned fpos;
int ret;
@@ -403,10 +413,10 @@ static int afs_dir_readdir(struct file *file, void *cookie, filldir_t filldir)
* - if afs_dir_iterate_block() spots this function, it'll pass the FID
* uniquifier through dtype
*/
-static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
- loff_t fpos, u64 ino, unsigned dtype)
+static int afs_lookup_filldir(void *_cookie, const char *name, int nlen,
+ loff_t fpos, u64 ino, unsigned dtype)
{
- struct afs_dir_lookup_cookie *cookie = _cookie;
+ struct afs_lookup_cookie *cookie = _cookie;
_enter("{%s,%Zu},%s,%u,,%llu,%u",
cookie->name, cookie->nlen, name, nlen, ino, dtype);
@@ -430,11 +440,12 @@ static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
/*
* do a lookup in a directory
+ * - just returns the FID the dentry name maps to if found
*/
static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
struct afs_fid *fid, struct key *key)
{
- struct afs_dir_lookup_cookie cookie;
+ struct afs_lookup_cookie cookie;
struct afs_super_info *as;
unsigned fpos;
int ret;
@@ -450,7 +461,7 @@ static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
cookie.found = 0;
fpos = 0;
- ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir,
+ ret = afs_dir_iterate(dir, &fpos, &cookie, afs_lookup_filldir,
key);
if (ret < 0) {
_leave(" = %d [iter]", ret);
@@ -471,8 +482,8 @@ static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
/*
* look up an entry in a directory
*/
-static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
{
struct afs_vnode *vnode;
struct afs_fid fid;
@@ -480,14 +491,18 @@ static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
struct key *key;
int ret;
- _enter("{%lu},%p{%s}", dir->i_ino, dentry, dentry->d_name.name);
+ vnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},%p{%s},",
+ vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name);
+
+ ASSERTCMP(dentry->d_inode, ==, NULL);
if (dentry->d_name.len > 255) {
_leave(" = -ENAMETOOLONG");
return ERR_PTR(-ENAMETOOLONG);
}
- vnode = AFS_FS_I(dir);
if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
_leave(" = -ESTALE");
return ERR_PTR(-ESTALE);
@@ -499,15 +514,28 @@ static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
return ERR_PTR(PTR_ERR(key));
}
+ ret = afs_validate(vnode, key);
+ if (ret < 0) {
+ key_put(key);
+ _leave(" = %d [val]", ret);
+ return ERR_PTR(ret);
+ }
+
ret = afs_do_lookup(dir, dentry, &fid, key);
if (ret < 0) {
key_put(key);
+ if (ret == -ENOENT) {
+ d_add(dentry, NULL);
+ _leave(" = NULL [negative]");
+ return NULL;
+ }
_leave(" = %d [do]", ret);
return ERR_PTR(ret);
}
+ dentry->d_fsdata = (void *)(unsigned long) vnode->status.data_version;
/* instantiate the dentry */
- inode = afs_iget(dir->i_sb, key, &fid);
+ inode = afs_iget(dir->i_sb, key, &fid, NULL, NULL);
key_put(key);
if (IS_ERR(inode)) {
_leave(" = %ld", PTR_ERR(inode));
@@ -527,105 +555,64 @@ static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
}
/*
- * propagate changed and modified flags on a directory to all the children of
- * that directory as they may indicate that the ACL on the dir has changed,
- * potentially rendering the child inaccessible or that a file has been deleted
- * or renamed
- */
-static void afs_propagate_dir_changes(struct dentry *dir)
-{
- struct dentry *child;
- bool c, m;
-
- c = test_bit(AFS_VNODE_CHANGED, &AFS_FS_I(dir->d_inode)->flags);
- m = test_bit(AFS_VNODE_MODIFIED, &AFS_FS_I(dir->d_inode)->flags);
-
- _enter("{%d,%d}", c, m);
-
- spin_lock(&dir->d_lock);
-
- list_for_each_entry(child, &dir->d_subdirs, d_u.d_child) {
- if (child->d_inode) {
- struct afs_vnode *vnode;
-
- _debug("tag %s", child->d_name.name);
- vnode = AFS_FS_I(child->d_inode);
- if (c)
- set_bit(AFS_VNODE_DIR_CHANGED, &vnode->flags);
- if (m)
- set_bit(AFS_VNODE_DIR_MODIFIED, &vnode->flags);
- }
- }
-
- spin_unlock(&dir->d_lock);
-}
-
-/*
* check that a dentry lookup hit has found a valid entry
* - NOTE! the hit can be a negative hit too, so we can't assume we have an
* inode
- * - there are several things we need to check
- * - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
- * symlink)
- * - parent dir metadata changed (security changes)
- * - dentry data changed (write, truncate)
- * - dentry metadata changed (security changes)
*/
static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
- struct afs_vnode *vnode;
+ struct afs_vnode *vnode, *dir;
struct afs_fid fid;
struct dentry *parent;
- struct inode *inode, *dir;
struct key *key;
+ void *dir_version;
int ret;
vnode = AFS_FS_I(dentry->d_inode);
- _enter("{sb=%p n=%s fl=%lx},",
- dentry->d_sb, dentry->d_name.name, vnode->flags);
+ if (dentry->d_inode)
+ _enter("{v={%x:%u} n=%s fl=%lx},",
+ vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
+ vnode->flags);
+ else
+ _enter("{neg n=%s}", dentry->d_name.name);
- key = afs_request_key(vnode->volume->cell);
+ key = afs_request_key(AFS_FS_S(dentry->d_sb)->volume->cell);
if (IS_ERR(key))
key = NULL;
/* lock down the parent dentry so we can peer at it */
parent = dget_parent(dentry);
-
- dir = parent->d_inode;
- inode = dentry->d_inode;
-
- /* handle a negative dentry */
- if (!inode)
+ if (!parent->d_inode)
goto out_bad;
- /* handle a bad inode */
- if (is_bad_inode(inode)) {
- printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n",
- parent->d_name.name, dentry->d_name.name);
- goto out_bad;
- }
+ dir = AFS_FS_I(parent->d_inode);
- /* check that this dirent still exists if the directory's contents were
- * modified */
- if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(dir)->flags)) {
+ /* validate the parent directory */
+ if (test_bit(AFS_VNODE_MODIFIED, &dir->flags))
+ afs_validate(dir, key);
+
+ if (test_bit(AFS_VNODE_DELETED, &dir->flags)) {
_debug("%s: parent dir deleted", dentry->d_name.name);
goto out_bad;
}
- if (test_and_clear_bit(AFS_VNODE_DIR_MODIFIED, &vnode->flags)) {
- /* rm/rmdir/rename may have occurred */
- _debug("dir modified");
+ dir_version = (void *) (unsigned long) dir->status.data_version;
+ if (dentry->d_fsdata == dir_version)
+ goto out_valid; /* the dir contents are unchanged */
- /* search the directory for this vnode */
- ret = afs_do_lookup(dir, dentry, &fid, key);
- if (ret == -ENOENT) {
- _debug("%s: dirent not found", dentry->d_name.name);
- goto not_found;
- }
- if (ret < 0) {
- _debug("failed to iterate dir %s: %d",
- parent->d_name.name, ret);
+ _debug("dir modified");
+
+ /* search the directory for this vnode */
+ ret = afs_do_lookup(&dir->vfs_inode, dentry, &fid, key);
+ switch (ret) {
+ case 0:
+ /* the filename maps to something */
+ if (!dentry->d_inode)
+ goto out_bad;
+ if (is_bad_inode(dentry->d_inode)) {
+ printk("kAFS: afs_d_revalidate: %s/%s has bad inode\n",
+ parent->d_name.name, dentry->d_name.name);
goto out_bad;
}
@@ -639,56 +626,35 @@ static int afs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
}
/* if the vnode ID uniqifier has changed, then the file has
- * been deleted */
+ * been deleted and replaced, and the original vnode ID has
+ * been reused */
if (fid.unique != vnode->fid.unique) {
_debug("%s: file deleted (uq %u -> %u I:%lu)",
dentry->d_name.name, fid.unique,
- vnode->fid.unique, inode->i_version);
+ vnode->fid.unique, dentry->d_inode->i_version);
spin_lock(&vnode->lock);
set_bit(AFS_VNODE_DELETED, &vnode->flags);
spin_unlock(&vnode->lock);
- invalidate_remote_inode(inode);
- goto out_bad;
+ goto not_found;
}
- }
+ goto out_valid;
- /* if the directory's metadata were changed then the security may be
- * different and we may no longer have access */
- mutex_lock(&vnode->cb_broken_lock);
-
- if (test_and_clear_bit(AFS_VNODE_DIR_CHANGED, &vnode->flags) ||
- test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
- _debug("%s: changed", dentry->d_name.name);
- set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
- if (afs_vnode_fetch_status(vnode, NULL, key) < 0) {
- mutex_unlock(&vnode->cb_broken_lock);
- goto out_bad;
- }
- }
+ case -ENOENT:
+ /* the filename is unknown */
+ _debug("%s: dirent not found", dentry->d_name.name);
+ if (dentry->d_inode)
+ goto not_found;
+ goto out_valid;
- if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
- _debug("%s: file already deleted", dentry->d_name.name);
- mutex_unlock(&vnode->cb_broken_lock);
+ default:
+ _debug("failed to iterate dir %s: %d",
+ parent->d_name.name, ret);
goto out_bad;
}
- /* if the vnode's data version number changed then its contents are
- * different */
- if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
- _debug("zap data");
- invalidate_remote_inode(inode);
- }
-
- if (S_ISDIR(inode->i_mode) &&
- (test_bit(AFS_VNODE_CHANGED, &vnode->flags) ||
- test_bit(AFS_VNODE_MODIFIED, &vnode->flags)))
- afs_propagate_dir_changes(dentry);
-
- clear_bit(AFS_VNODE_CHANGED, &vnode->flags);
- clear_bit(AFS_VNODE_MODIFIED, &vnode->flags);
- mutex_unlock(&vnode->cb_broken_lock);
-
out_valid:
+ dentry->d_fsdata = dir_version;
+out_skip:
dput(parent);
key_put(key);
_leave(" = 1 [valid]");
@@ -701,10 +667,10 @@ not_found:
spin_unlock(&dentry->d_lock);
out_bad:
- if (inode) {
+ if (dentry->d_inode) {
/* don't unhash if we have submounts */
if (have_submounts(dentry))
- goto out_valid;
+ goto out_skip;
}
_debug("dropping dentry %s/%s",
@@ -742,3 +708,433 @@ zap:
_leave(" = 1 [zap]");
return 1;
}
+
+/*
+ * handle dentry release
+ */
+static void afs_d_release(struct dentry *dentry)
+{
+ _enter("%s", dentry->d_name.name);
+}
+
+/*
+ * create a directory on an AFS filesystem
+ */
+static int afs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ struct afs_file_status status;
+ struct afs_callback cb;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%o",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ mode |= S_IFDIR;
+ ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
+ mode, &fid, &status, &cb, &server);
+ if (ret < 0)
+ goto mkdir_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+mkdir_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * remove a directory from an AFS filesystem
+ */
+static int afs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s}",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, true);
+ if (ret < 0)
+ goto rmdir_error;
+
+ if (dentry->d_inode) {
+ vnode = AFS_FS_I(dentry->d_inode);
+ clear_nlink(&vnode->vfs_inode);
+ set_bit(AFS_VNODE_DELETED, &vnode->flags);
+ afs_discard_callback_on_delete(vnode);
+ }
+
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+rmdir_error:
+ key_put(key);
+error:
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * remove a file from an AFS filesystem
+ */
+static int afs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s}",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ if (dentry->d_inode) {
+ vnode = AFS_FS_I(dentry->d_inode);
+
+ /* make sure we have a callback promise on the victim */
+ ret = afs_validate(vnode, key);
+ if (ret < 0)
+ goto error;
+ }
+
+ ret = afs_vnode_remove(dvnode, key, dentry->d_name.name, false);
+ if (ret < 0)
+ goto remove_error;
+
+ if (dentry->d_inode) {
+ /* if the file wasn't deleted due to excess hard links, the
+ * fileserver will break the callback promise on the file - if
+ * it had one - before it returns to us, and if it was deleted,
+ * it won't
+ *
+ * however, if we didn't have a callback promise outstanding,
+ * or it was outstanding on a different server, then it won't
+ * break it either...
+ */
+ vnode = AFS_FS_I(dentry->d_inode);
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ _debug("AFS_VNODE_DELETED");
+ if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags))
+ _debug("AFS_VNODE_CB_BROKEN");
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ ret = afs_validate(vnode, key);
+ _debug("nlink %d [val %d]", vnode->vfs_inode.i_nlink, ret);
+ }
+
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+remove_error:
+ key_put(key);
+error:
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a regular file on an AFS filesystem
+ */
+static int afs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+{
+ struct afs_file_status status;
+ struct afs_callback cb;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%o,",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ mode |= S_IFREG;
+ ret = afs_vnode_create(dvnode, key, dentry->d_name.name,
+ mode, &fid, &status, &cb, &server);
+ if (ret < 0)
+ goto create_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, &cb);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+create_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a hard link between files in an AFS filesystem
+ */
+static int afs_link(struct dentry *from, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct afs_vnode *dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ vnode = AFS_FS_I(from->d_inode);
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%x:%d},{%s}",
+ vnode->fid.vid, vnode->fid.vnode,
+ dvnode->fid.vid, dvnode->fid.vnode,
+ dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_link(dvnode, vnode, key, dentry->d_name.name);
+ if (ret < 0)
+ goto link_error;
+
+ atomic_inc(&vnode->vfs_inode.i_count);
+ d_instantiate(dentry, &vnode->vfs_inode);
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+link_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * create a symlink in an AFS filesystem
+ */
+static int afs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *content)
+{
+ struct afs_file_status status;
+ struct afs_server *server;
+ struct afs_vnode *dvnode, *vnode;
+ struct afs_fid fid;
+ struct inode *inode;
+ struct key *key;
+ int ret;
+
+ dvnode = AFS_FS_I(dir);
+
+ _enter("{%x:%d},{%s},%s",
+ dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name,
+ content);
+
+ ret = -ENAMETOOLONG;
+ if (dentry->d_name.len > 255)
+ goto error;
+
+ ret = -EINVAL;
+ if (strlen(content) > 1023)
+ goto error;
+
+ key = afs_request_key(dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_symlink(dvnode, key, dentry->d_name.name, content,
+ &fid, &status, &server);
+ if (ret < 0)
+ goto create_error;
+
+ inode = afs_iget(dir->i_sb, key, &fid, &status, NULL);
+ if (IS_ERR(inode)) {
+ /* ENOMEM at a really inconvenient time - just abandon the new
+ * directory on the server */
+ ret = PTR_ERR(inode);
+ goto iget_error;
+ }
+
+ /* apply the status report we've got for the new vnode */
+ vnode = AFS_FS_I(inode);
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+
+ d_instantiate(dentry, inode);
+ if (d_unhashed(dentry)) {
+ _debug("not hashed");
+ d_rehash(dentry);
+ }
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+iget_error:
+ afs_put_server(server);
+create_error:
+ key_put(key);
+error:
+ d_drop(dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
+ * rename a file in an AFS filesystem and/or move it between directories
+ */
+static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
+ struct key *key;
+ int ret;
+
+ vnode = AFS_FS_I(old_dentry->d_inode);
+ orig_dvnode = AFS_FS_I(old_dir);
+ new_dvnode = AFS_FS_I(new_dir);
+
+ _enter("{%x:%d},{%x:%d},{%x:%d},{%s}",
+ orig_dvnode->fid.vid, orig_dvnode->fid.vnode,
+ vnode->fid.vid, vnode->fid.vnode,
+ new_dvnode->fid.vid, new_dvnode->fid.vnode,
+ new_dentry->d_name.name);
+
+ ret = -ENAMETOOLONG;
+ if (new_dentry->d_name.len > 255)
+ goto error;
+
+ key = afs_request_key(orig_dvnode->volume->cell);
+ if (IS_ERR(key)) {
+ ret = PTR_ERR(key);
+ goto error;
+ }
+
+ ret = afs_vnode_rename(orig_dvnode, new_dvnode, key,
+ old_dentry->d_name.name,
+ new_dentry->d_name.name);
+ if (ret < 0)
+ goto rename_error;
+ key_put(key);
+ _leave(" = 0");
+ return 0;
+
+rename_error:
+ key_put(key);
+error:
+ d_drop(new_dentry);
+ _leave(" = %d", ret);
+ return ret;
+}
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 101bbb8..59cd955 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -50,6 +50,7 @@ int afs_open(struct inode *inode, struct file *file)
{
struct afs_vnode *vnode = AFS_FS_I(inode);
struct key *key;
+ int ret;
_enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
@@ -58,6 +59,12 @@ int afs_open(struct inode *inode, struct file *file)
_leave(" = %ld [key]", PTR_ERR(key));
return PTR_ERR(key);
}
+
+ ret = afs_validate(vnode, key);
+ if (ret < 0) {
+ _leave(" = %d [val]", ret);
+ return ret;
+ }
file->private_data = key;
_leave(" = 0");
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 321b489..f036b4c 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -16,14 +16,28 @@
#include "afs_fs.h"
/*
+ * decode an AFSFid block
+ */
+static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
+{
+ const __be32 *bp = *_bp;
+
+ fid->vid = ntohl(*bp++);
+ fid->vnode = ntohl(*bp++);
+ fid->unique = ntohl(*bp++);
+ *_bp = bp;
+}
+
+/*
* decode an AFSFetchStatus block
*/
static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
+ struct afs_file_status *status,
struct afs_vnode *vnode)
{
const __be32 *bp = *_bp;
umode_t mode;
- u64 data_version;
+ u64 data_version, size;
u32 changed = 0; /* becomes non-zero if ctime-type changes seen */
#define EXTRACT(DST) \
@@ -33,55 +47,68 @@ static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
DST = x; \
} while (0)
- vnode->status.if_version = ntohl(*bp++);
- EXTRACT(vnode->status.type);
- vnode->status.nlink = ntohl(*bp++);
- EXTRACT(vnode->status.size);
+ status->if_version = ntohl(*bp++);
+ EXTRACT(status->type);
+ EXTRACT(status->nlink);
+ size = ntohl(*bp++);
data_version = ntohl(*bp++);
- EXTRACT(vnode->status.author);
- EXTRACT(vnode->status.owner);
- EXTRACT(vnode->status.caller_access); /* call ticket dependent */
- EXTRACT(vnode->status.anon_access);
- EXTRACT(vnode->status.mode);
- vnode->status.parent.vid = vnode->fid.vid;
- EXTRACT(vnode->status.parent.vnode);
- EXTRACT(vnode->status.parent.unique);
+ EXTRACT(status->author);
+ EXTRACT(status->owner);
+ EXTRACT(status->caller_access); /* call ticket dependent */
+ EXTRACT(status->anon_access);
+ EXTRACT(status->mode);
+ EXTRACT(status->parent.vnode);
+ EXTRACT(status->parent.unique);
bp++; /* seg size */
- vnode->status.mtime_client = ntohl(*bp++);
- vnode->status.mtime_server = ntohl(*bp++);
- bp++; /* group */
+ status->mtime_client = ntohl(*bp++);
+ status->mtime_server = ntohl(*bp++);
+ EXTRACT(status->group);
bp++; /* sync counter */
data_version |= (u64) ntohl(*bp++) << 32;
- bp++; /* spare2 */
- bp++; /* spare3 */
- bp++; /* spare4 */
+ bp++; /* lock count */
+ size |= (u64) ntohl(*bp++) << 32;
+ bp++; /* spare 4 */
*_bp = bp;
- if (changed) {
- _debug("vnode changed");
- set_bit(AFS_VNODE_CHANGED, &vnode->flags);
- vnode->vfs_inode.i_uid = vnode->status.owner;
- vnode->vfs_inode.i_size = vnode->status.size;
- vnode->vfs_inode.i_version = vnode->fid.unique;
-
- vnode->status.mode &= S_IALLUGO;
- mode = vnode->vfs_inode.i_mode;
- mode &= ~S_IALLUGO;
- mode |= vnode->status.mode;
- vnode->vfs_inode.i_mode = mode;
+ if (size != status->size) {
+ status->size = size;
+ changed |= true;
}
+ status->mode &= S_IALLUGO;
_debug("vnode time %lx, %lx",
- vnode->status.mtime_client, vnode->status.mtime_server);
- vnode->vfs_inode.i_ctime.tv_sec = vnode->status.mtime_server;
- vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
- vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
-
- if (vnode->status.data_version != data_version) {
- _debug("vnode modified %llx", data_version);
- vnode->status.data_version = data_version;
- set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
- set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
+ status->mtime_client, status->mtime_server);
+
+ if (vnode) {
+ status->parent.vid = vnode->fid.vid;
+ if (changed && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
+ _debug("vnode changed");
+ i_size_write(&vnode->vfs_inode, size);
+ vnode->vfs_inode.i_uid = status->owner;
+ vnode->vfs_inode.i_gid = status->group;
+ vnode->vfs_inode.i_version = vnode->fid.unique;
+ vnode->vfs_inode.i_nlink = status->nlink;
+
+ mode = vnode->vfs_inode.i_mode;
+ mode &= ~S_IALLUGO;
+ mode |= status->mode;
+ barrier();
+ vnode->vfs_inode.i_mode = mode;
+ }
+
+ vnode->vfs_inode.i_ctime.tv_sec = status->mtime_server;
+ vnode->vfs_inode.i_mtime = vnode->vfs_inode.i_ctime;
+ vnode->vfs_inode.i_atime = vnode->vfs_inode.i_ctime;
+ }
+
+ if (status->data_version != data_version) {
+ status->data_version = data_version;
+ if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
+ _debug("vnode modified %llx on {%x:%u}",
+ data_version, vnode->fid.vid, vnode->fid.vnode);
+ set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
+ set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
+ }
}
}
@@ -99,6 +126,17 @@ static void xdr_decode_AFSCallBack(const __be32 **_bp, struct afs_vnode *vnode)
*_bp = bp;
}
+static void xdr_decode_AFSCallBack_raw(const __be32 **_bp,
+ struct afs_callback *cb)
+{
+ const __be32 *bp = *_bp;
+
+ cb->version = ntohl(*bp++);
+ cb->expiry = ntohl(*bp++);
+ cb->type = ntohl(*bp++);
+ *_bp = bp;
+}
+
/*
* decode an AFSVolSync block
*/
@@ -122,6 +160,7 @@ static void xdr_decode_AFSVolSync(const __be32 **_bp,
static int afs_deliver_fs_fetch_status(struct afs_call *call,
struct sk_buff *skb, bool last)
{
+ struct afs_vnode *vnode = call->reply;
const __be32 *bp;
_enter(",,%u", last);
@@ -135,8 +174,8 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call,
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, call->reply);
- xdr_decode_AFSCallBack(&bp, call->reply);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack(&bp, vnode);
if (call->reply2)
xdr_decode_AFSVolSync(&bp, call->reply2);
@@ -166,9 +205,10 @@ int afs_fs_fetch_file_status(struct afs_server *server,
struct afs_call *call;
__be32 *bp;
- _enter(",%x,,,", key_serial(key));
+ _enter(",%x,{%x:%d},,",
+ key_serial(key), vnode->fid.vid, vnode->fid.vnode);
- call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, 120);
+ call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
@@ -194,6 +234,7 @@ int afs_fs_fetch_file_status(struct afs_server *server,
static int afs_deliver_fs_fetch_data(struct afs_call *call,
struct sk_buff *skb, bool last)
{
+ struct afs_vnode *vnode = call->reply;
const __be32 *bp;
struct page *page;
void *buffer;
@@ -248,7 +289,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
/* extract the metadata */
case 3:
- ret = afs_extract_data(call, skb, last, call->buffer, 120);
+ ret = afs_extract_data(call, skb, last, call->buffer,
+ (21 + 3 + 6) * 4);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
@@ -256,8 +298,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call,
}
bp = call->buffer;
- xdr_decode_AFSFetchStatus(&bp, call->reply);
- xdr_decode_AFSCallBack(&bp, call->reply);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack(&bp, vnode);
if (call->reply2)
xdr_decode_AFSVolSync(&bp, call->reply2);
@@ -296,7 +338,6 @@ int afs_fs_fetch_data(struct afs_server *server,
struct afs_vnode *vnode,
off_t offset, size_t length,
struct page *buffer,
- struct afs_volsync *volsync,
const struct afs_wait_mode *wait_mode)
{
struct afs_call *call;
@@ -304,13 +345,13 @@ int afs_fs_fetch_data(struct afs_server *server,
_enter("");
- call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, 120);
+ call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = key;
call->reply = vnode;
- call->reply2 = volsync;
+ call->reply2 = NULL; /* volsync */
call->reply3 = buffer;
call->service_id = FS_SERVICE;
call->port = htons(AFS_FS_PORT);
@@ -411,3 +452,485 @@ int afs_fs_give_up_callbacks(struct afs_server *server,
return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
}
+
+/*
+ * deliver reply data to an FS.CreateFile or an FS.MakeDir
+ */
+static int afs_deliver_fs_create_vnode(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFid(&bp, call->reply2);
+ xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSCallBack_raw(&bp, call->reply4);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.CreateFile and FS.MakeDir operation type
+ */
+static const struct afs_call_type afs_RXFSCreateXXXX = {
+ .name = "FS.CreateXXXX",
+ .deliver = afs_deliver_fs_create_vnode,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * create a file or make a directory
+ */
+int afs_fs_create(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ umode_t mode,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_callback *newcb,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz + (6 * 4);
+
+ call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
+ (3 + 21 + 21 + 3 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = newfid;
+ call->reply3 = newstatus;
+ call->reply4 = newcb;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
+ }
+ *bp++ = htonl(AFS_SET_MODE);
+ *bp++ = 0; /* mtime */
+ *bp++ = 0; /* owner */
+ *bp++ = 0; /* group */
+ *bp++ = htonl(mode & S_IALLUGO); /* unix mode */
+ *bp++ = 0; /* segment size */
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.RemoveFile or FS.RemoveDir
+ */
+static int afs_deliver_fs_remove(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.RemoveDir/FS.RemoveFile operation type
+ */
+static const struct afs_call_type afs_RXFSRemoveXXXX = {
+ .name = "FS.RemoveXXXX",
+ .deliver = afs_deliver_fs_remove,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * remove a file or directory
+ */
+int afs_fs_remove(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ bool isdir,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz;
+
+ call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
+ }
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.Link
+ */
+static int afs_deliver_fs_link(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *dvnode = call->reply, *vnode = call->reply2;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Link operation type
+ */
+static const struct afs_call_type afs_RXFSLink = {
+ .name = "FS.Link",
+ .deliver = afs_deliver_fs_link,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * make a hard link
+ */
+int afs_fs_link(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *dvnode,
+ struct afs_vnode *vnode,
+ const char *name,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+ reqsz = (5 * 4) + namesz + padsz + (3 * 4);
+
+ call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = dvnode;
+ call->reply2 = vnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSLINK);
+ *bp++ = htonl(dvnode->fid.vid);
+ *bp++ = htonl(dvnode->fid.vnode);
+ *bp++ = htonl(dvnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
+ }
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.Symlink
+ */
+static int afs_deliver_fs_symlink(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *vnode = call->reply;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFid(&bp, call->reply2);
+ xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
+ xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Symlink operation type
+ */
+static const struct afs_call_type afs_RXFSSymlink = {
+ .name = "FS.Symlink",
+ .deliver = afs_deliver_fs_symlink,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * create a symbolic link
+ */
+int afs_fs_symlink(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *vnode,
+ const char *name,
+ const char *contents,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t namesz, reqsz, padsz, c_namesz, c_padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ namesz = strlen(name);
+ padsz = (4 - (namesz & 3)) & 3;
+
+ c_namesz = strlen(contents);
+ c_padsz = (4 - (c_namesz & 3)) & 3;
+
+ reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
+
+ call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
+ (3 + 21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = vnode;
+ call->reply2 = newfid;
+ call->reply3 = newstatus;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSSYMLINK);
+ *bp++ = htonl(vnode->fid.vid);
+ *bp++ = htonl(vnode->fid.vnode);
+ *bp++ = htonl(vnode->fid.unique);
+ *bp++ = htonl(namesz);
+ memcpy(bp, name, namesz);
+ bp = (void *) bp + namesz;
+ if (padsz > 0) {
+ memset(bp, 0, padsz);
+ bp = (void *) bp + padsz;
+ }
+ *bp++ = htonl(c_namesz);
+ memcpy(bp, contents, c_namesz);
+ bp = (void *) bp + c_namesz;
+ if (c_padsz > 0) {
+ memset(bp, 0, c_padsz);
+ bp = (void *) bp + c_padsz;
+ }
+ *bp++ = htonl(AFS_SET_MODE);
+ *bp++ = 0; /* mtime */
+ *bp++ = 0; /* owner */
+ *bp++ = 0; /* group */
+ *bp++ = htonl(S_IRWXUGO); /* unix mode */
+ *bp++ = 0; /* segment size */
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.Rename
+ */
+static int afs_deliver_fs_rename(struct afs_call *call,
+ struct sk_buff *skb, bool last)
+{
+ struct afs_vnode *orig_dvnode = call->reply, *new_dvnode = call->reply2;
+ const __be32 *bp;
+
+ _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+
+ afs_transfer_reply(call, skb);
+ if (!last)
+ return 0;
+
+ if (call->reply_size != call->reply_max)
+ return -EBADMSG;
+
+ /* unmarshall the reply once we've received all of it */
+ bp = call->buffer;
+ xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode);
+ if (new_dvnode != orig_dvnode)
+ xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode);
+ /* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * FS.Rename operation type
+ */
+static const struct afs_call_type afs_RXFSRename = {
+ .name = "FS.Rename",
+ .deliver = afs_deliver_fs_rename,
+ .abort_to_error = afs_abort_to_error,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * create a symbolic link
+ */
+int afs_fs_rename(struct afs_server *server,
+ struct key *key,
+ struct afs_vnode *orig_dvnode,
+ const char *orig_name,
+ struct afs_vnode *new_dvnode,
+ const char *new_name,
+ const struct afs_wait_mode *wait_mode)
+{
+ struct afs_call *call;
+ size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
+ __be32 *bp;
+
+ _enter("");
+
+ o_namesz = strlen(orig_name);
+ o_padsz = (4 - (o_namesz & 3)) & 3;
+
+ n_namesz = strlen(new_name);
+ n_padsz = (4 - (n_namesz & 3)) & 3;
+
+ reqsz = (4 * 4) +
+ 4 + o_namesz + o_padsz +
+ (3 * 4) +
+ 4 + n_namesz + n_padsz;
+
+ call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
+ if (!call)
+ return -ENOMEM;
+
+ call->key = key;
+ call->reply = orig_dvnode;
+ call->reply2 = new_dvnode;
+ call->service_id = FS_SERVICE;
+ call->port = htons(AFS_FS_PORT);
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(FSRENAME);
+ *bp++ = htonl(orig_dvnode->fid.vid);
+ *bp++ = htonl(orig_dvnode->fid.vnode);
+ *bp++ = htonl(orig_dvnode->fid.unique);
+ *bp++ = htonl(o_namesz);
+ memcpy(bp, orig_name, o_namesz);
+ bp = (void *) bp + o_namesz;
+ if (o_padsz > 0) {
+ memset(bp, 0, o_padsz);
+ bp = (void *) bp + o_padsz;
+ }
+
+ *bp++ = htonl(new_dvnode->fid.vid);
+ *bp++ = htonl(new_dvnode->fid.vnode);
+ *bp++ = htonl(new_dvnode->fid.unique);
+ *bp++ = htonl(n_namesz);
+ memcpy(bp, new_name, n_namesz);
+ bp = (void *) bp + n_namesz;
+ if (n_padsz > 0) {
+ memset(bp, 0, n_padsz);
+ bp = (void *) bp + n_padsz;
+ }
+
+ return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 2273362..56ca858 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -33,7 +33,7 @@ static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
{
struct inode *inode = AFS_VNODE_TO_I(vnode);
- _debug("FS: ft=%d lk=%d sz=%Zu ver=%Lu mod=%hu",
+ _debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
vnode->status.type,
vnode->status.nlink,
vnode->status.size,
@@ -115,8 +115,9 @@ static int afs_iget5_set(struct inode *inode, void *opaque)
/*
* inode retrieval
*/
-inline struct inode *afs_iget(struct super_block *sb, struct key *key,
- struct afs_fid *fid)
+struct inode *afs_iget(struct super_block *sb, struct key *key,
+ struct afs_fid *fid, struct afs_file_status *status,
+ struct afs_callback *cb)
{
struct afs_iget_data data = { .fid = *fid };
struct afs_super_info *as;
@@ -156,16 +157,37 @@ inline struct inode *afs_iget(struct super_block *sb, struct key *key,
&vnode->cache);
#endif
- /* okay... it's a new inode */
- set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
- ret = afs_vnode_fetch_status(vnode, NULL, key);
- if (ret < 0)
- goto bad_inode;
+ if (!status) {
+ /* it's a remotely extant inode */
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto bad_inode;
+ } else {
+ /* it's an inode we just created */
+ memcpy(&vnode->status, status, sizeof(vnode->status));
+
+ if (!cb) {
+ /* it's a symlink we just created (the fileserver
+ * didn't give us a callback) */
+ vnode->cb_version = 0;
+ vnode->cb_expiry = 0;
+ vnode->cb_type = 0;
+ vnode->cb_expires = get_seconds();
+ } else {
+ vnode->cb_version = cb->version;
+ vnode->cb_expiry = cb->expiry;
+ vnode->cb_type = cb->type;
+ vnode->cb_expires = vnode->cb_expiry + get_seconds();
+ }
+ }
+
ret = afs_inode_map_status(vnode, key);
if (ret < 0)
goto bad_inode;
/* success */
+ clear_bit(AFS_VNODE_UNSET, &vnode->flags);
inode->i_flags |= S_NOATIME;
unlock_new_inode(inode);
_leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type);
@@ -182,6 +204,78 @@ bad_inode:
}
/*
+ * validate a vnode/inode
+ * - there are several things we need to check
+ * - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
+ * symlink)
+ * - parent dir metadata changed (security changes)
+ * - dentry data changed (write, truncate)
+ * - dentry metadata changed (security changes)
+ */
+int afs_validate(struct afs_vnode *vnode, struct key *key)
+{
+ int ret;
+
+ _enter("{v={%x:%u} fl=%lx},%x",
+ vnode->fid.vid, vnode->fid.vnode, vnode->flags,
+ key_serial(key));
+
+ if (vnode->cb_promised &&
+ !test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) &&
+ !test_bit(AFS_VNODE_MODIFIED, &vnode->flags) &&
+ !test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+ if (vnode->cb_expires < get_seconds() + 10) {
+ _debug("callback expired");
+ set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ } else {
+ goto valid;
+ }
+ }
+
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ goto valid;
+
+ mutex_lock(&vnode->validate_lock);
+
+ /* if the promise has expired, we need to check the server again to get
+ * a new promise - note that if the (parent) directory's metadata was
+ * changed then the security may be different and we may no longer have
+ * access */
+ if (!vnode->cb_promised ||
+ test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
+ _debug("not promised");
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto error_unlock;
+ _debug("new promise [fl=%lx]", vnode->flags);
+ }
+
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
+ _debug("file already deleted");
+ ret = -ESTALE;
+ goto error_unlock;
+ }
+
+ /* if the vnode's data version number changed then its contents are
+ * different */
+ if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+ _debug("zap data {%x:%d}", vnode->fid.vid, vnode->fid.vnode);
+ invalidate_remote_inode(&vnode->vfs_inode);
+ }
+
+ clear_bit(AFS_VNODE_MODIFIED, &vnode->flags);
+ mutex_unlock(&vnode->validate_lock);
+valid:
+ _leave(" = 0");
+ return 0;
+
+error_unlock:
+ mutex_unlock(&vnode->validate_lock);
+ _leave(" = %d", ret);
+ return ret;
+}
+
+/*
* read the attributes of an inode
*/
int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
@@ -207,9 +301,10 @@ void afs_clear_inode(struct inode *inode)
vnode = AFS_FS_I(inode);
- _enter("ino=%lu { vn=%08x v=%u x=%u t=%u }",
- inode->i_ino,
+ _enter("{%x:%d.%d} v=%u x=%u t=%u }",
+ vnode->fid.vid,
vnode->fid.vnode,
+ vnode->fid.unique,
vnode->cb_version,
vnode->cb_expiry,
vnode->cb_type);
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 6120d4b..73bfa0b 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -80,6 +80,7 @@ struct afs_call {
void *reply; /* reply buffer (first part) */
void *reply2; /* reply buffer (second part) */
void *reply3; /* reply buffer (third part) */
+ void *reply4; /* reply buffer (fourth part) */
enum { /* call state */
AFS_CALL_REQUESTING, /* request is being sent for outgoing call */
AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */
@@ -300,19 +301,18 @@ struct afs_vnode {
#endif
struct afs_permits *permits; /* cache of permits so far obtained */
struct mutex permits_lock; /* lock for altering permits list */
+ struct mutex validate_lock; /* lock for validating this vnode */
wait_queue_head_t update_waitq; /* status fetch waitqueue */
- unsigned update_cnt; /* number of outstanding ops that will update the
+ int update_cnt; /* number of outstanding ops that will update the
* status */
spinlock_t lock; /* waitqueue/flags lock */
unsigned long flags;
#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
-#define AFS_VNODE_CHANGED 1 /* set if vnode's metadata changed */
+#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
#define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
-#define AFS_VNODE_DIR_CHANGED 6 /* set if vnode's parent dir metadata changed */
-#define AFS_VNODE_DIR_MODIFIED 7 /* set if vnode's parent dir data modified */
long acl_order; /* ACL check count (callback break count) */
@@ -320,7 +320,6 @@ struct afs_vnode {
struct rb_node server_rb; /* link in server->fs_vnodes */
struct rb_node cb_promise; /* link in server->cb_promises */
struct work_struct cb_broken_work; /* work to be done on callback break */
- struct mutex cb_broken_lock; /* lock against multiple attempts to fix break */
time_t cb_expires; /* time at which callback expires */
time_t cb_expires_at; /* time used to order cb_promise */
unsigned cb_version; /* callback version */
@@ -388,6 +387,7 @@ extern void afs_init_callback_state(struct afs_server *);
extern void afs_broken_callback_work(struct work_struct *);
extern void afs_break_callbacks(struct afs_server *, size_t,
struct afs_callback[]);
+extern void afs_discard_callback_on_delete(struct afs_vnode *);
extern void afs_give_up_callback(struct afs_vnode *);
extern void afs_dispatch_give_up_callbacks(struct work_struct *);
extern void afs_flush_callback_breaks(struct afs_server *);
@@ -448,14 +448,34 @@ extern int afs_fs_give_up_callbacks(struct afs_server *,
const struct afs_wait_mode *);
extern int afs_fs_fetch_data(struct afs_server *, struct key *,
struct afs_vnode *, off_t, size_t, struct page *,
- struct afs_volsync *,
const struct afs_wait_mode *);
+extern int afs_fs_create(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, umode_t,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *,
+ const struct afs_wait_mode *);
+extern int afs_fs_remove(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, bool,
+ const struct afs_wait_mode *);
+extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
+extern int afs_fs_symlink(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, const char *,
+ struct afs_fid *, struct afs_file_status *,
+ const struct afs_wait_mode *);
+extern int afs_fs_rename(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
/*
* inode.c
*/
extern struct inode *afs_iget(struct super_block *, struct key *,
- struct afs_fid *);
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *);
+extern int afs_validate(struct afs_vnode *, struct key *);
extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
struct kstat *);
extern void afs_zap_permits(struct rcu_head *);
@@ -522,7 +542,11 @@ extern int afs_permission(struct inode *, int, struct nameidata *);
*/
extern spinlock_t afs_server_peer_lock;
-#define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0)
+#define afs_get_server(S) \
+do { \
+ _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
+ atomic_inc(&(S)->usage); \
+} while(0)
extern struct afs_server *afs_lookup_server(struct afs_cell *,
const struct in_addr *);
@@ -588,10 +612,24 @@ static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
return &vnode->vfs_inode;
}
+extern void afs_vnode_finalise_status_update(struct afs_vnode *,
+ struct afs_server *);
extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
struct key *);
extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
off_t, size_t, struct page *);
+extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *,
+ umode_t, struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *, struct afs_server **);
+extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
+ bool);
+extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
+ const char *);
+extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *,
+ const char *, struct afs_fid *,
+ struct afs_file_status *, struct afs_server **);
+extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
+ struct key *, const char *, const char *);
/*
* volume.c
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index 98e9276..cdb9792 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -22,6 +22,7 @@ int afs_abort_to_error(u32 abort_code)
{
switch (abort_code) {
case 13: return -EACCES;
+ case 30: return -EROFS;
case VSALVAGE: return -EIO;
case VNOVNODE: return -ENOENT;
case VNOVOL: return -ENOMEDIUM;
@@ -33,6 +34,24 @@ int afs_abort_to_error(u32 abort_code)
case VOVERQUOTA: return -EDQUOT;
case VBUSY: return -EBUSY;
case VMOVED: return -ENXIO;
- default: return -EIO;
+ case 0x2f6df0c: return -EACCES;
+ case 0x2f6df0f: return -EBUSY;
+ case 0x2f6df10: return -EEXIST;
+ case 0x2f6df11: return -EXDEV;
+ case 0x2f6df13: return -ENOTDIR;
+ case 0x2f6df14: return -EISDIR;
+ case 0x2f6df15: return -EINVAL;
+ case 0x2f6df1a: return -EFBIG;
+ case 0x2f6df1b: return -ENOSPC;
+ case 0x2f6df1d: return -EROFS;
+ case 0x2f6df1e: return -EMLINK;
+ case 0x2f6df20: return -EDOM;
+ case 0x2f6df21: return -ERANGE;
+ case 0x2f6df22: return -EDEADLK;
+ case 0x2f6df23: return -ENAMETOOLONG;
+ case 0x2f6df24: return -ENOLCK;
+ case 0x2f6df26: return -ENOTEMPTY;
+ case 0x2f6df78: return -EDQUOT;
+ default: return -EREMOTEIO;
}
}
diff --git a/fs/afs/security.c b/fs/afs/security.c
index cbdd7f7..f9f424d 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -92,7 +92,7 @@ static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode,
ASSERT(auth_inode != NULL);
} else {
auth_inode = afs_iget(vnode->vfs_inode.i_sb, key,
- &vnode->status.parent);
+ &vnode->status.parent, NULL, NULL);
if (IS_ERR(auth_inode))
return ERR_PTR(PTR_ERR(auth_inode));
}
@@ -288,7 +288,8 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
struct key *key;
int ret;
- _enter("{%x:%x},%x,", vnode->fid.vid, vnode->fid.vnode, mask);
+ _enter("{{%x:%x},%lx},%x,",
+ vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key)) {
@@ -296,13 +297,19 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
return PTR_ERR(key);
}
+ /* if the promise has expired, we need to check the server again */
+ if (!vnode->cb_promised) {
+ _debug("not promised");
+ ret = afs_vnode_fetch_status(vnode, NULL, key);
+ if (ret < 0)
+ goto error;
+ _debug("new promise [fl=%lx]", vnode->flags);
+ }
+
/* check the permits to see if we've got one yet */
ret = afs_check_permit(vnode, key, &access);
- if (ret < 0) {
- key_put(key);
- _leave(" = %d [check]", ret);
- return ret;
- }
+ if (ret < 0)
+ goto error;
/* interpret the access mask */
_debug("REQ %x ACC %x on %s",
@@ -336,10 +343,14 @@ int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
}
key_put(key);
- return generic_permission(inode, mask, NULL);
+ ret = generic_permission(inode, mask, NULL);
+ _leave(" = %d", ret);
+ return ret;
permission_denied:
+ ret = -EACCES;
+error:
key_put(key);
- _leave(" = -EACCES");
- return -EACCES;
+ _leave(" = %d", ret);
+ return ret;
}
diff --git a/fs/afs/server.c b/fs/afs/server.c
index d44bba3..1654e90 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -223,6 +223,8 @@ void afs_put_server(struct afs_server *server)
_enter("%p{%d}", server, atomic_read(&server->usage));
+ _debug("PUT SERVER %d", atomic_read(&server->usage));
+
ASSERTCMP(atomic_read(&server->usage), >, 0);
if (likely(!atomic_dec_and_test(&server->usage))) {
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 17d7092..441f583 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -331,7 +331,7 @@ static int afs_fill_super(struct super_block *sb, void *data)
fid.vid = as->volume->vid;
fid.vnode = 1;
fid.unique = 1;
- inode = afs_iget(sb, params->key, &fid);
+ inode = afs_iget(sb, params->key, &fid, NULL, NULL);
if (IS_ERR(inode))
goto error_inode;
@@ -473,9 +473,9 @@ static void afs_i_init_once(void *_vnode, struct kmem_cache *cachep,
inode_init_once(&vnode->vfs_inode);
init_waitqueue_head(&vnode->update_waitq);
mutex_init(&vnode->permits_lock);
+ mutex_init(&vnode->validate_lock);
spin_lock_init(&vnode->lock);
INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
- mutex_init(&vnode->cb_broken_lock);
}
}
@@ -497,7 +497,7 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
vnode->volume = NULL;
vnode->update_cnt = 0;
- vnode->flags = 0;
+ vnode->flags = 1 << AFS_VNODE_UNSET;
vnode->cb_promised = false;
return &vnode->vfs_inode;
diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index 1600976..a1904ab 100644
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -30,7 +30,7 @@ static noinline bool dump_tree_aux(struct rb_node *node, struct rb_node *parent,
bad = dump_tree_aux(node->rb_left, node, depth + 2, '/');
vnode = rb_entry(node, struct afs_vnode, cb_promise);
- kdebug("%c %*.*s%c%p {%d}",
+ _debug("%c %*.*s%c%p {%d}",
rb_is_red(node) ? 'R' : 'B',
depth, depth, "", lr,
vnode, vnode->cb_expires_at);
@@ -47,7 +47,7 @@ static noinline bool dump_tree_aux(struct rb_node *node, struct rb_node *parent,
static noinline void dump_tree(const char *name, struct afs_server *server)
{
- kenter("%s", name);
+ _enter("%s", name);
if (dump_tree_aux(server->cb_promises.rb_node, NULL, 0, '-'))
BUG();
}
@@ -187,47 +187,61 @@ static void afs_vnode_deleted_remotely(struct afs_vnode *vnode)
spin_unlock(&server->cb_lock);
}
+ spin_lock(&vnode->server->fs_lock);
+ rb_erase(&vnode->server_rb, &vnode->server->fs_vnodes);
+ spin_unlock(&vnode->server->fs_lock);
+
+ vnode->server = NULL;
afs_put_server(server);
}
/*
- * finish off updating the recorded status of a file
+ * finish off updating the recorded status of a file after a successful
+ * operation completion
* - starts callback expiry timer
* - adds to server's callback list
*/
-static void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
- struct afs_server *server,
- int ret)
+void afs_vnode_finalise_status_update(struct afs_vnode *vnode,
+ struct afs_server *server)
{
struct afs_server *oldserver = NULL;
- _enter("%p,%p,%d", vnode, server, ret);
+ _enter("%p,%p", vnode, server);
+
+ spin_lock(&vnode->lock);
+ clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+ afs_vnode_note_promise(vnode, server);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+
+ wake_up_all(&vnode->update_waitq);
+ afs_put_server(oldserver);
+ _leave("");
+}
+
+/*
+ * finish off updating the recorded status of a file after an operation failed
+ */
+static void afs_vnode_status_update_failed(struct afs_vnode *vnode, int ret)
+{
+ _enter("%p,%d", vnode, ret);
spin_lock(&vnode->lock);
clear_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
- switch (ret) {
- case 0:
- afs_vnode_note_promise(vnode, server);
- break;
- case -ENOENT:
+ if (ret == -ENOENT) {
/* the file was deleted on the server */
_debug("got NOENT from server - marking file deleted");
afs_vnode_deleted_remotely(vnode);
- break;
- default:
- break;
}
vnode->update_cnt--;
-
+ ASSERTCMP(vnode->update_cnt, >=, 0);
spin_unlock(&vnode->lock);
wake_up_all(&vnode->update_waitq);
-
- afs_put_server(oldserver);
-
_leave("");
}
@@ -275,8 +289,12 @@ int afs_vnode_fetch_status(struct afs_vnode *vnode,
return 0;
}
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
if (vnode->update_cnt > 0) {
/* someone else started a fetch */
+ _debug("wait on fetch %d", vnode->update_cnt);
+
set_current_state(TASK_UNINTERRUPTIBLE);
ASSERT(myself.func != NULL);
add_wait_queue(&vnode->update_waitq, &myself);
@@ -325,7 +343,7 @@ get_anyway:
/* pick a server to query */
server = afs_volume_pick_fileserver(vnode);
if (IS_ERR(server))
- return PTR_ERR(server);
+ goto no_server;
_debug("USING SERVER: %p{%08x}",
server, ntohl(server->addr.s_addr));
@@ -336,17 +354,34 @@ get_anyway:
} while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- if (ret == 0 && auth_vnode)
- afs_cache_permit(vnode, key, acl_order);
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ _debug("adjust");
+ if (auth_vnode)
+ afs_cache_permit(vnode, key, acl_order);
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ _debug("failed [%d]", ret);
+ afs_vnode_status_update_failed(vnode, ret);
+ }
- _leave(" = %d", ret);
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
}
/*
* fetch file data from the volume
- * - TODO implement caching and server failover
+ * - TODO implement caching
*/
int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key,
off_t offset, size_t length, struct page *page)
@@ -372,18 +407,349 @@ int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key,
/* pick a server to query */
server = afs_volume_pick_fileserver(vnode);
if (IS_ERR(server))
- return PTR_ERR(server);
+ goto no_server;
_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
ret = afs_fs_fetch_data(server, key, vnode, offset, length,
- page, NULL, &afs_sync_call);
+ page, &afs_sync_call);
} while (!afs_volume_release_fileserver(vnode, server, ret));
/* adjust the flags */
- afs_vnode_finalise_status_update(vnode, server, ret);
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ }
_leave(" = %d", ret);
return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ return PTR_ERR(server);
+}
+
+/*
+ * make a file or a directory
+ */
+int afs_vnode_create(struct afs_vnode *vnode, struct key *key,
+ const char *name, umode_t mode, struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_callback *newcb, struct afs_server **_server)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s,,",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're creating in */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_create(server, key, vnode, name, mode, newfid,
+ newstatus, newcb, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * remove a file or directory
+ */
+int afs_vnode_remove(struct afs_vnode *vnode, struct key *key, const char *name,
+ bool isdir)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_remove(server, key, vnode, name, isdir,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * create a hard link
+ */
+extern int afs_vnode_link(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+ struct key *key, const char *name)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s",
+ dvnode->volume->vlocation->vldb.name,
+ dvnode->fid.vid,
+ dvnode->fid.vnode,
+ dvnode->fid.unique,
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name);
+
+ /* this op will fetch the status on the directory we're removing from */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt++;
+ spin_unlock(&dvnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(dvnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_link(server, key, dvnode, vnode, name,
+ &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ afs_vnode_finalise_status_update(dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ afs_vnode_status_update_failed(dvnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ spin_lock(&dvnode->lock);
+ dvnode->update_cnt--;
+ ASSERTCMP(dvnode->update_cnt, >=, 0);
+ spin_unlock(&dvnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * create a symbolic link
+ */
+int afs_vnode_symlink(struct afs_vnode *vnode, struct key *key,
+ const char *name, const char *content,
+ struct afs_fid *newfid,
+ struct afs_file_status *newstatus,
+ struct afs_server **_server)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%x,%s,%s,,,",
+ vnode->volume->vlocation->vldb.name,
+ vnode->fid.vid,
+ vnode->fid.vnode,
+ vnode->fid.unique,
+ key_serial(key),
+ name, content);
+
+ /* this op will fetch the status on the directory we're creating in */
+ spin_lock(&vnode->lock);
+ vnode->update_cnt++;
+ spin_unlock(&vnode->lock);
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(vnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_symlink(server, key, vnode, name, content,
+ newfid, newstatus, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(vnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(vnode, server);
+ *_server = server;
+ } else {
+ afs_vnode_status_update_failed(vnode, ret);
+ *_server = NULL;
+ }
+
+ _leave(" = %d [cnt %d]", ret, vnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&vnode->lock);
+ vnode->update_cnt--;
+ ASSERTCMP(vnode->update_cnt, >=, 0);
+ spin_unlock(&vnode->lock);
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), vnode->update_cnt);
+ return PTR_ERR(server);
+}
+
+/*
+ * rename a file
+ */
+int afs_vnode_rename(struct afs_vnode *orig_dvnode,
+ struct afs_vnode *new_dvnode,
+ struct key *key,
+ const char *orig_name,
+ const char *new_name)
+{
+ struct afs_server *server;
+ int ret;
+
+ _enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s,%s",
+ orig_dvnode->volume->vlocation->vldb.name,
+ orig_dvnode->fid.vid,
+ orig_dvnode->fid.vnode,
+ orig_dvnode->fid.unique,
+ new_dvnode->volume->vlocation->vldb.name,
+ new_dvnode->fid.vid,
+ new_dvnode->fid.vnode,
+ new_dvnode->fid.unique,
+ key_serial(key),
+ orig_name,
+ new_name);
+
+ /* this op will fetch the status on both the directories we're dealing
+ * with */
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt++;
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt++;
+ spin_unlock(&new_dvnode->lock);
+ }
+
+ do {
+ /* pick a server to query */
+ server = afs_volume_pick_fileserver(orig_dvnode);
+ if (IS_ERR(server))
+ goto no_server;
+
+ _debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+ ret = afs_fs_rename(server, key, orig_dvnode, orig_name,
+ new_dvnode, new_name, &afs_sync_call);
+
+ } while (!afs_volume_release_fileserver(orig_dvnode, server, ret));
+
+ /* adjust the flags */
+ if (ret == 0) {
+ afs_vnode_finalise_status_update(orig_dvnode, server);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_finalise_status_update(new_dvnode, server);
+ afs_put_server(server);
+ } else {
+ afs_vnode_status_update_failed(orig_dvnode, ret);
+ if (new_dvnode != orig_dvnode)
+ afs_vnode_status_update_failed(new_dvnode, ret);
+ }
+
+ _leave(" = %d [cnt %d]", ret, orig_dvnode->update_cnt);
+ return ret;
+
+no_server:
+ spin_lock(&orig_dvnode->lock);
+ orig_dvnode->update_cnt--;
+ ASSERTCMP(orig_dvnode->update_cnt, >=, 0);
+ spin_unlock(&orig_dvnode->lock);
+ if (new_dvnode != orig_dvnode) {
+ spin_lock(&new_dvnode->lock);
+ new_dvnode->update_cnt--;
+ ASSERTCMP(new_dvnode->update_cnt, >=, 0);
+ spin_unlock(&new_dvnode->lock);
+ }
+ _leave(" = %ld [cnt %d]", PTR_ERR(server), orig_dvnode->update_cnt);
+ return PTR_ERR(server);
}
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 15e1367..dd160ca 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -295,6 +295,7 @@ struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *vnode)
* - releases the ref on the server struct that was acquired by picking
* - records result of using a particular server to access a volume
* - return 0 to try again, 1 if okay or to issue error
+ * - the caller must release the server struct if result was 0
*/
int afs_volume_release_fileserver(struct afs_vnode *vnode,
struct afs_server *server,
@@ -312,7 +313,8 @@ int afs_volume_release_fileserver(struct afs_vnode *vnode,
case 0:
server->fs_act_jif = jiffies;
server->fs_state = 0;
- break;
+ _leave("");
+ return 1;
/* the fileserver denied all knowledge of the volume */
case -ENOMEDIUM:
@@ -377,14 +379,12 @@ int afs_volume_release_fileserver(struct afs_vnode *vnode,
server->fs_act_jif = jiffies;
case -ENOMEM:
case -ENONET:
- break;
+ /* tell the caller to accept the result */
+ afs_put_server(server);
+ _leave(" [local failure]");
+ return 1;
}
- /* tell the caller to accept the result */
- afs_put_server(server);
- _leave("");
- return 1;
-
/* tell the caller to loop around and try the next server */
try_next_server_upw:
up_write(&volume->server_sem);
-
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