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Date: Thu, 17 Jan 2008 12:54:18 +0100
From: Mathieu Segaud <mathieu.segaud@...ala.cx>
To: reiserfs-devel@...r.kernel.org
Cc: reiserfs-devel@...esys.com, linux-kernel@...r.kernel.org,
akpm@...ux-foundation.org,
Mathieu Segaud <mathieu.segaud@...ala.cx>
Subject: [PATCH] Convert reiserfs_ioctl() to an unlocked_ioctl
Signed-off-by: Mathieu Segaud <mathieu.segaud@...ala.cx>
---
fs/reiserfs/dir.c | 2 +-
fs/reiserfs/file.c | 2 +-
fs/reiserfs/ioctl.c | 94 ++++++++++++++++++++++++++++---------------
include/linux/reiserfs_fs.h | 2 +-
4 files changed, 65 insertions(+), 35 deletions(-)
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index e6b03d2..f267cf9 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -20,7 +20,7 @@ const struct file_operations reiserfs_dir_operations = {
.read = generic_read_dir,
.readdir = reiserfs_readdir,
.fsync = reiserfs_dir_fsync,
- .ioctl = reiserfs_ioctl,
+ .unlocked_ioctl = reiserfs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = reiserfs_compat_ioctl,
#endif
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index a804903..e4d415c 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -284,7 +284,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
const struct file_operations reiserfs_file_operations = {
.read = do_sync_read,
.write = reiserfs_file_write,
- .ioctl = reiserfs_ioctl,
+ .unlocked_ioctl = reiserfs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = reiserfs_compat_ioctl,
#endif
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index e0f0f09..5da64ab 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -21,80 +21,110 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp);
** 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
** 3) That's all for a while ...
*/
-int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
+long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
unsigned int flags;
+ struct inode *inode;
+ long retval = 0;
+
+ lock_kernel();
+ inode = filp->f_dentry->d_inode;
switch (cmd) {
case REISERFS_IOC_UNPACK:
if (S_ISREG(inode->i_mode)) {
if (arg)
- return reiserfs_unpack(inode, filp);
- else
- return 0;
+ retval = reiserfs_unpack(inode, filp);
} else
- return -ENOTTY;
+ retval = -ENOTTY;
+ goto out;
/* following two cases are taken from fs/ext2/ioctl.c by Remy
Card (card@...i.ibp.fr) */
case REISERFS_IOC_GETFLAGS:
- if (!reiserfs_attrs(inode->i_sb))
- return -ENOTTY;
+ if (!reiserfs_attrs(inode->i_sb)) {
+ retval = -ENOTTY;
+ goto out;
+ }
flags = REISERFS_I(inode)->i_attrs;
i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
- return put_user(flags, (int __user *)arg);
+ retval = put_user(flags, (int __user *)arg);
+ goto out;
case REISERFS_IOC_SETFLAGS:{
- if (!reiserfs_attrs(inode->i_sb))
- return -ENOTTY;
+ if (!reiserfs_attrs(inode->i_sb)) {
+ retval = -ENOTTY;
+ goto out;
+ }
- if (IS_RDONLY(inode))
- return -EROFS;
+ if (IS_RDONLY(inode)) {
+ retval = -EROFS;
+ goto out;
+ }
- if (!is_owner_or_cap(inode))
- return -EPERM;
+ if (!is_owner_or_cap(inode)) {
+ retval = -EPERM;
+ goto out;
+ }
- if (get_user(flags, (int __user *)arg))
- return -EFAULT;
+ if (get_user(flags, (int __user *)arg)) {
+ retval = -EFAULT;
+ goto out;
+ }
/* Is it quota file? Do not allow user to mess with it. */
- if (IS_NOQUOTA(inode))
- return -EPERM;
+ if (IS_NOQUOTA(inode)) {
+ retval = -EPERM;
+ goto out;
+ }
if (((flags ^ REISERFS_I(inode)->
i_attrs) & (REISERFS_IMMUTABLE_FL |
REISERFS_APPEND_FL))
- && !capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
+ && !capable(CAP_LINUX_IMMUTABLE)) {
+ retval = -EPERM;
+ goto out;
+ }
if ((flags & REISERFS_NOTAIL_FL) &&
S_ISREG(inode->i_mode)) {
int result;
result = reiserfs_unpack(inode, filp);
- if (result)
+ if (result) {
+ unlock_kernel();
return result;
+ }
}
sd_attrs_to_i_attrs(flags, inode);
REISERFS_I(inode)->i_attrs = flags;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- return 0;
+ goto out;
}
case REISERFS_IOC_GETVERSION:
- return put_user(inode->i_generation, (int __user *)arg);
+ retval = put_user(inode->i_generation, (int __user *)arg);
+ goto out;
case REISERFS_IOC_SETVERSION:
- if (!is_owner_or_cap(inode))
- return -EPERM;
- if (IS_RDONLY(inode))
- return -EROFS;
- if (get_user(inode->i_generation, (int __user *)arg))
- return -EFAULT;
+ if (!is_owner_or_cap(inode)) {
+ retval = -EPERM;
+ goto out;
+ }
+ if (IS_RDONLY(inode)) {
+ retval = -EROFS;
+ goto out;
+ }
+ if (get_user(inode->i_generation, (int __user *)arg)) {
+ retval = -EFAULT;
+ goto out;
+ }
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- return 0;
+ goto out;
default:
- return -ENOTTY;
+ retval = -ENOTTY;
}
+out:
+ unlock_kernel();
+ return retval;
}
#ifdef CONFIG_COMPAT
diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h
index 422eab4..4994327 100644
--- a/include/linux/reiserfs_fs.h
+++ b/include/linux/reiserfs_fs.h
@@ -2172,7 +2172,7 @@ __u32 r5_hash(const signed char *msg, int len);
#define SPARE_SPACE 500
/* prototypes from ioctl.c */
-int reiserfs_ioctl(struct inode *inode, struct file *filp,
+long reiserfs_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
long reiserfs_compat_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg);
--
1.5.3.8
--
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