| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1278195310-25590-7-git-send-email-arnd@arndb.de>
Date: Sun, 4 Jul 2010 00:15:10 +0200
From: Arnd Bergmann <arnd@...db.de>
To: linux-kernel@...r.kernel.org
Cc: John Kacur <jkacur@...hat.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 6/6] bkl: remove locked .ioctl file operation
The last user is gone, so we can safely remove this
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Documentation/filesystems/Locking | 8 +-------
Documentation/filesystems/vfs.txt | 6 +-----
fs/bad_inode.c | 7 -------
fs/compat_ioctl.c | 3 +--
fs/ioctl.c | 18 ++++--------------
fs/proc/inode.c | 17 ++++-------------
include/linux/fs.h | 5 ++---
7 files changed, 13 insertions(+), 51 deletions(-)
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 96d4293..34657e0 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -372,8 +372,6 @@ prototypes:
ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
- int (*ioctl) (struct inode *, struct file *, unsigned int,
- unsigned long);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
@@ -407,8 +405,7 @@ write: no
aio_write: no
readdir: no
poll: no
-ioctl: yes (see below)
-unlocked_ioctl: no (see below)
+unlocked_ioctl: no
compat_ioctl: no
mmap: no
open: no
@@ -451,9 +448,6 @@ move ->readdir() to inode_operations and use a separate method for directory
anything that resembles union-mount we won't have a struct file for all
components. And there are other reasons why the current interface is a mess...
-->ioctl() on regular files is superceded by the ->unlocked_ioctl() that
-doesn't take the BKL.
-
->read on directories probably must go away - we should just enforce -EISDIR
in sys_read() and friends.
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 94677e7..ed7e5ef 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -727,7 +727,6 @@ struct file_operations {
ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
- int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
@@ -768,10 +767,7 @@ otherwise noted.
activity on this file and (optionally) go to sleep until there
is activity. Called by the select(2) and poll(2) system calls
- ioctl: called by the ioctl(2) system call
-
- unlocked_ioctl: called by the ioctl(2) system call. Filesystems that do not
- require the BKL should use this method instead of the ioctl() above.
+ unlocked_ioctl: called by the ioctl(2) system call.
compat_ioctl: called by the ioctl(2) system call when 32 bit system calls
are used on 64 bit kernels.
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 52e59bf..f024d8a 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -55,12 +55,6 @@ static unsigned int bad_file_poll(struct file *filp, poll_table *wait)
return POLLERR;
}
-static int bad_file_ioctl (struct inode *inode, struct file *filp,
- unsigned int cmd, unsigned long arg)
-{
- return -EIO;
-}
-
static long bad_file_unlocked_ioctl(struct file *file, unsigned cmd,
unsigned long arg)
{
@@ -159,7 +153,6 @@ static const struct file_operations bad_file_ops =
.aio_write = bad_file_aio_write,
.readdir = bad_file_readdir,
.poll = bad_file_poll,
- .ioctl = bad_file_ioctl,
.unlocked_ioctl = bad_file_unlocked_ioctl,
.compat_ioctl = bad_file_compat_ioctl,
.mmap = bad_file_mmap,
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 618f381..0fffcdc 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1693,8 +1693,7 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
goto out_fput;
}
- if (!filp->f_op ||
- (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
+ if (!filp->f_op || !filp->f_op->unlocked_ioctl)
goto do_ioctl;
break;
}
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 2d140a7..f855ea4 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -29,7 +29,6 @@
* @arg: command-specific argument for ioctl
*
* Invokes filesystem specific ->unlocked_ioctl, if one exists; otherwise
- * invokes filesystem specific ->ioctl method. If neither method exists,
* returns -ENOTTY.
*
* Returns 0 on success, -errno on error.
@@ -39,21 +38,12 @@ static long vfs_ioctl(struct file *filp, unsigned int cmd,
{
int error = -ENOTTY;
- if (!filp->f_op)
+ if (!filp->f_op || !filp->f_op->unlocked_ioctl)
goto out;
- if (filp->f_op->unlocked_ioctl) {
- error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
- if (error == -ENOIOCTLCMD)
- error = -EINVAL;
- goto out;
- } else if (filp->f_op->ioctl) {
- lock_kernel();
- error = filp->f_op->ioctl(filp->f_path.dentry->d_inode,
- filp, cmd, arg);
- unlock_kernel();
- }
-
+ error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
+ if (error == -ENOIOCTLCMD)
+ error = -EINVAL;
out:
return error;
}
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index aea8502..041517c 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -214,8 +214,7 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne
{
struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
long rv = -ENOTTY;
- long (*unlocked_ioctl)(struct file *, unsigned int, unsigned long);
- int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long);
+ long (*ioctl)(struct file *, unsigned int, unsigned long);
spin_lock(&pde->pde_unload_lock);
if (!pde->proc_fops) {
@@ -223,19 +222,11 @@ static long proc_reg_unlocked_ioctl(struct file *file, unsigned int cmd, unsigne
return rv;
}
pde->pde_users++;
- unlocked_ioctl = pde->proc_fops->unlocked_ioctl;
- ioctl = pde->proc_fops->ioctl;
+ ioctl = pde->proc_fops->unlocked_ioctl;
spin_unlock(&pde->pde_unload_lock);
- if (unlocked_ioctl) {
- rv = unlocked_ioctl(file, cmd, arg);
- if (rv == -ENOIOCTLCMD)
- rv = -EINVAL;
- } else if (ioctl) {
- WARN_ONCE(1, "Procfs ioctl handlers must use unlocked_ioctl, "
- "%pf will be called without the Bkl held\n", ioctl);
- rv = ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
- }
+ if (ioctl)
+ rv = ioctl(file, cmd, arg);
pde_users_dec(pde);
return rv;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 471e1ff..019a1b8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1479,8 +1479,8 @@ struct block_device_operations;
/*
* NOTE:
- * read, write, poll, fsync, readv, writev, unlocked_ioctl and compat_ioctl
- * can be called without the big kernel lock held in all filesystems.
+ * all file operations except setlease can be called without
+ * the big kernel lock held in all filesystems.
*/
struct file_operations {
struct module *owner;
@@ -1491,7 +1491,6 @@ struct file_operations {
ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
int (*readdir) (struct file *, void *, filldir_t);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
- int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
long (*compat_ioctl) (struct file *, unsigned int, unsigned long);
int (*mmap) (struct file *, struct vm_area_struct *);
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists