ocfs2: need rollback when journal_access failed in ocfs2_orphan_add()
authorYounger Liu <younger.liu@huawei.com>
Wed, 3 Jul 2013 22:00:58 +0000 (15:00 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 3 Jul 2013 23:07:24 +0000 (16:07 -0700)
While adding a file into orphan dir in ocfs2_orphan_add(), it calls
__ocfs2_add_entry() before ocfs2_journal_access_di().  If
ocfs2_journal_access_di() failed, the file is added into orphan dir, and
orphan dir dinode updated, but file dinode has not been updated.
Accordingly, the data is not consistent between file dinode and orphan
dir.

So, need to call ocfs2_journal_access_di() before __ocfs2_add_entry(),
and if ocfs2_journal_access_di() failed, orphan_fe and
orphan_dir_inode->i_nlink need rollback.

This bug was added by 3939fda4 ("Ocfs2: Journaling i_flags and
i_orphaned_slot when adding inode to orphan dir.").

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Acked-by: Jeff Liu <jeff.liu@oracle.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/ocfs2/namei.c

index 75964addfe3242fec9a9eb5f963e126d191a86af..30842f5cf590b11432a9a74f7758bcc1555c0180 100644 (file)
@@ -2012,6 +2012,21 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
                goto leave;
        }
 
+       /*
+        * We're going to journal the change of i_flags and i_orphaned_slot.
+        * It's safe anyway, though some callers may duplicate the journaling.
+        * Journaling within the func just make the logic look more
+        * straightforward.
+        */
+       status = ocfs2_journal_access_di(handle,
+                                        INODE_CACHE(inode),
+                                        fe_bh,
+                                        OCFS2_JOURNAL_ACCESS_WRITE);
+       if (status < 0) {
+               mlog_errno(status);
+               goto leave;
+       }
+
        /* we're a cluster, and nlink can change on disk from
         * underneath us... */
        orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
@@ -2026,22 +2041,7 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
                                   orphan_dir_bh, lookup);
        if (status < 0) {
                mlog_errno(status);
-               goto leave;
-       }
-
-       /*
-        * We're going to journal the change of i_flags and i_orphaned_slot.
-        * It's safe anyway, though some callers may duplicate the journaling.
-        * Journaling within the func just make the logic look more
-        * straightforward.
-        */
-       status = ocfs2_journal_access_di(handle,
-                                        INODE_CACHE(inode),
-                                        fe_bh,
-                                        OCFS2_JOURNAL_ACCESS_WRITE);
-       if (status < 0) {
-               mlog_errno(status);
-               goto leave;
+               goto rollback;
        }
 
        fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
@@ -2057,11 +2057,16 @@ static int ocfs2_orphan_add(struct ocfs2_super *osb,
        trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
                                   osb->slot_num);
 
+rollback:
+       if (status < 0) {
+               if (S_ISDIR(inode->i_mode))
+                       ocfs2_add_links_count(orphan_fe, -1);
+               set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
+       }
+
 leave:
        brelse(orphan_dir_bh);
 
-       if (status)
-               mlog_errno(status);
        return status;
 }