Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=baab81fa518ecfac597402b462631f5593926623
Commit: baab81fa518ecfac597402b462631f5593926623
Parent: 0afc2edfada50980bec999f94dcea26ebad3dda6
Author: Andi Kleen <[EMAIL PROTECTED]>
AuthorDate: Sun Jan 27 16:58:51 2008 -0600
Committer: Dave Kleikamp <[EMAIL PROTECTED]>
CommitDate: Thu Feb 7 13:33:58 2008 -0600
BKL-removal: Use unlocked_ioctl for jfs
Convert jfs_ioctl over to not use the BKL. The only potential race
I could see was with two ioctls in parallel changing the flags
and losing the updates. Use the i_mutex to protect against this.
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
Signed-off-by: Dave Kleikamp <[EMAIL PROTECTED]>
---
fs/jfs/file.c | 2 +-
fs/jfs/ioctl.c | 13 ++++++++++---
fs/jfs/jfs_inode.h | 3 +--
fs/jfs/namei.c | 2 +-
4 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 87eb936..713ff4c 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -112,5 +112,5 @@ const struct file_operations jfs_file_operations = {
.splice_write = generic_file_splice_write,
.fsync = jfs_fsync,
.release = jfs_release,
- .ioctl = jfs_ioctl,
+ .unlocked_ioctl = jfs_ioctl,
};
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index dfda12a..fc82ecc 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -51,9 +51,9 @@ static long jfs_map_ext2(unsigned long flags, int from)
}
-int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
- unsigned long arg)
+long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
+ struct inode *inode = filp->f_dentry->d_inode;
struct jfs_inode_info *jfs_inode = JFS_IP(inode);
unsigned int flags;
@@ -82,6 +82,10 @@ int jfs_ioctl(struct inode * inode, struct file * filp,
unsigned int cmd,
/* Is it quota file? Do not allow user to mess with it */
if (IS_NOQUOTA(inode))
return -EPERM;
+
+ /* Lock against other parallel changes of flags */
+ mutex_lock(&inode->i_mutex);
+
jfs_get_inode_flags(jfs_inode);
oldflags = jfs_inode->mode2;
@@ -92,8 +96,10 @@ int jfs_ioctl(struct inode * inode, struct file * filp,
unsigned int cmd,
if ((oldflags & JFS_IMMUTABLE_FL) ||
((flags ^ oldflags) &
(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
- if (!capable(CAP_LINUX_IMMUTABLE))
+ if (!capable(CAP_LINUX_IMMUTABLE)) {
+ mutex_unlock(&inode->i_mutex);
return -EPERM;
+ }
}
flags = flags & JFS_FL_USER_MODIFIABLE;
@@ -101,6 +107,7 @@ int jfs_ioctl(struct inode * inode, struct file * filp,
unsigned int cmd,
jfs_inode->mode2 = flags;
jfs_set_inode_flags(inode);
+ mutex_unlock(&inode->i_mutex);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
return 0;
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index 95a6a11..570fd5e 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -22,8 +22,7 @@ struct fid;
extern struct inode *ialloc(struct inode *, umode_t);
extern int jfs_fsync(struct file *, struct dentry *, int);
-extern int jfs_ioctl(struct inode *, struct file *,
- unsigned int, unsigned long);
+extern long jfs_ioctl(struct file *, unsigned int, unsigned long);
extern struct inode *jfs_iget(struct super_block *, unsigned long);
extern int jfs_commit_inode(struct inode *, int);
extern int jfs_write_inode(struct inode*, int);
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 403cfc2..6440904 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1556,7 +1556,7 @@ const struct file_operations jfs_dir_operations = {
.read = generic_read_dir,
.readdir = jfs_readdir,
.fsync = jfs_fsync,
- .ioctl = jfs_ioctl,
+ .unlocked_ioctl = jfs_ioctl,
};
static int jfs_ci_hash(struct dentry *dir, struct qstr *this)
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
