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authorLinus Torvalds <torvalds@linux-foundation.org>2011-01-21 07:33:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-21 07:33:37 -0800
commit4843456c5c341eb57f80f9224362a22665d14107 (patch)
tree5656b405a8b1d2596e8eb748b953ee677a261e3c /fs/ext4
parent2b1caf6ed7b888c95a1909d343799672731651a5 (diff)
parentf00c9e44ad1a9660fe8cd3ca15b6cd9497172eab (diff)
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: quota: Fix deadlock during path resolution
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/super.c25
1 files changed, 7 insertions, 18 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index cb10a06775e..48ce561fafa 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1161,7 +1161,7 @@ static int ext4_release_dquot(struct dquot *dquot);
static int ext4_mark_dquot_dirty(struct dquot *dquot);
static int ext4_write_info(struct super_block *sb, int type);
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
- char *path);
+ struct path *path);
static int ext4_quota_off(struct super_block *sb, int type);
static int ext4_quota_on_mount(struct super_block *sb, int type);
static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
@@ -4558,27 +4558,20 @@ static int ext4_quota_on_mount(struct super_block *sb, int type)
* Standard function to be called on quota_on
*/
static int ext4_quota_on(struct super_block *sb, int type, int format_id,
- char *name)
+ struct path *path)
{
int err;
- struct path path;
if (!test_opt(sb, QUOTA))
return -EINVAL;
- err = kern_path(name, LOOKUP_FOLLOW, &path);
- if (err)
- return err;
-
/* Quotafile not on the same filesystem? */
- if (path.mnt->mnt_sb != sb) {
- path_put(&path);
+ if (path->mnt->mnt_sb != sb)
return -EXDEV;
- }
/* Journaling quota? */
if (EXT4_SB(sb)->s_qf_names[type]) {
/* Quotafile not in fs root? */
- if (path.dentry->d_parent != sb->s_root)
+ if (path->dentry->d_parent != sb->s_root)
ext4_msg(sb, KERN_WARNING,
"Quota file not on filesystem root. "
"Journaled quota will not work");
@@ -4589,7 +4582,7 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
* all updates to the file when we bypass pagecache...
*/
if (EXT4_SB(sb)->s_journal &&
- ext4_should_journal_data(path.dentry->d_inode)) {
+ ext4_should_journal_data(path->dentry->d_inode)) {
/*
* We don't need to lock updates but journal_flush() could
* otherwise be livelocked...
@@ -4597,15 +4590,11 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- if (err) {
- path_put(&path);
+ if (err)
return err;
- }
}
- err = dquot_quota_on_path(sb, type, format_id, &path);
- path_put(&path);
- return err;
+ return dquot_quota_on(sb, type, format_id, path);
}
static int ext4_quota_off(struct super_block *sb, int type)