[PATCH 3.16 098/212] ext4: preserve the needs_recovery flag when the journal is aborted

[Ben Hutchings]

3.16.44-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Theodore Ts'o <ty...@mit.edu>

commit 97abd7d4b5d9c48ec15c425485f054e1c15e591b upstream.

If the journal is aborted, the needs_recovery feature flag should not
be removed.  Otherwise, it's the journal might not get replayed and
this could lead to more data getting lost.

Signed-off-by: Theodore Ts'o <ty...@mit.edu>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 fs/ext4/super.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -783,6 +783,7 @@ static void ext4_put_super(struct super_
 {
        struct ext4_sb_info *sbi = EXT4_SB(sb);
        struct ext4_super_block *es = sbi->s_es;
+       int aborted = 0;
        int i, err;
 
        ext4_unregister_li_request(sb);
@@ -792,9 +793,10 @@ static void ext4_put_super(struct super_
        destroy_workqueue(sbi->rsv_conversion_wq);
 
        if (sbi->s_journal) {
+               aborted = is_journal_aborted(sbi->s_journal);
                err = jbd2_journal_destroy(sbi->s_journal);
                sbi->s_journal = NULL;
-               if (err < 0)
+               if ((err < 0) && !aborted)
                        ext4_abort(sb, "Couldn't clean up the journal");
        }
 
@@ -805,7 +807,7 @@ static void ext4_put_super(struct super_
        ext4_ext_release(sb);
        ext4_xattr_put_super(sb);
 
-       if (!(sb->s_flags & MS_RDONLY)) {
+       if (!(sb->s_flags & MS_RDONLY) && !aborted) {
                EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
                es->s_state = cpu_to_le16(sbi->s_mount_state);
        }