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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-21 07:33:37 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-21 07:33:37 -0800 |
| commit | 4843456c5c341eb57f80f9224362a22665d14107 (patch) | |
| tree | 5656b405a8b1d2596e8eb748b953ee677a261e3c /fs/ext3 | |
| parent | 2b1caf6ed7b888c95a1909d343799672731651a5 (diff) | |
| parent | f00c9e44ad1a9660fe8cd3ca15b6cd9497172eab (diff) | |
| download | kernel-common-4843456c5c341eb57f80f9224362a22665d14107.tar.gz kernel-common-4843456c5c341eb57f80f9224362a22665d14107.tar.bz2 kernel-common-4843456c5c341eb57f80f9224362a22665d14107.zip | |
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/ext3')
| -rw-r--r-- | fs/ext3/super.c | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 7aa767d4f06f..85c8cc8f2473 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -754,7 +754,7 @@ static int ext3_release_dquot(struct dquot *dquot); static int ext3_mark_dquot_dirty(struct dquot *dquot); static int ext3_write_info(struct super_block *sb, int type); static int ext3_quota_on(struct super_block *sb, int type, int format_id, - char *path); + struct path *path); static int ext3_quota_on_mount(struct super_block *sb, int type); static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off); @@ -2877,27 +2877,20 @@ static int ext3_quota_on_mount(struct super_block *sb, int type) * Standard function to be called on quota_on */ static int ext3_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 (EXT3_SB(sb)->s_qf_names[type]) { /* Quotafile not of fs root? */ - if (path.dentry->d_parent != sb->s_root) + if (path->dentry->d_parent != sb->s_root) ext3_msg(sb, KERN_WARNING, "warning: Quota file not on filesystem root. " "Journaled quota will not work."); @@ -2907,7 +2900,7 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id, * When we journal data on quota file, we have to flush journal to see * all updates to the file when we bypass pagecache... */ - if (ext3_should_journal_data(path.dentry->d_inode)) { + if (ext3_should_journal_data(path->dentry->d_inode)) { /* * We don't need to lock updates but journal_flush() could * otherwise be livelocked... @@ -2915,15 +2908,11 @@ static int ext3_quota_on(struct super_block *sb, int type, int format_id, journal_lock_updates(EXT3_SB(sb)->s_journal); err = journal_flush(EXT3_SB(sb)->s_journal); journal_unlock_updates(EXT3_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); } /* Read data from quotafile - avoid pagecache and such because we cannot afford |