[PATCH 3.10 010/268] ext4: preserve the needs_recovery flag when the journal is aborted

Willy Tarreau
2017-06-19T18:35:01Z

From: Theodore Ts'o <tytso@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 <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
fs/ext4/super.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ae1d5c4..aa50d44 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -753,6 +753,7 @@ static void ext4_put_super(struct super_block *sb)
{
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);
@@ -762,9 +763,10 @@ static void ext4_put_super(struct super_block *sb)
destroy_workqueue(sbi->dio_unwritten_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");
}

@@ -775,7 +777,7 @@ static void ext4_put_super(struct super_block *sb)
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);
}
--
2.8.0.rc2.1.gbe9624a