[PATCH 4.9 081/125] ocfs2: clear journal dirty flag after shutdown journal

From: Greg Kroah-Hartman
Date: Wed Dec 04 2019 - 13:16:42 EST


From: Junxiao Bi <junxiao.bi@xxxxxxxxxx>

[ Upstream commit d85400af790dba2aa294f0a77e712f166681f977 ]

Dirty flag of the journal should be cleared at the last stage of umount,
if do it before jbd2_journal_destroy(), then some metadata in uncommitted
transaction could be lost due to io error, but as dirty flag of journal
was already cleared, we can't find that until run a full fsck. This may
cause system panic or other corruption.

Link: http://lkml.kernel.org/r/20181121020023.3034-3-junxiao.bi@xxxxxxxxxx
Signed-off-by: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Reviewed-by: Yiwen Jiang <jiangyiwen@xxxxxxxxxx>
Reviewed-by: Joseph Qi <jiangqi903@xxxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Changwei Ge <ge.changwei@xxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/ocfs2/journal.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index a30f63623db70..13cf69aa4cae8 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1018,7 +1018,8 @@ void ocfs2_journal_shutdown(struct ocfs2_super *osb)
mlog_errno(status);
}

- if (status == 0) {
+ /* Shutdown the kernel journal system */
+ if (!jbd2_journal_destroy(journal->j_journal) && !status) {
/*
* Do not toggle if flush was unsuccessful otherwise
* will leave dirty metadata in a "clean" journal
@@ -1027,9 +1028,6 @@ void ocfs2_journal_shutdown(struct ocfs2_super *osb)
if (status < 0)
mlog_errno(status);
}
-
- /* Shutdown the kernel journal system */
- jbd2_journal_destroy(journal->j_journal);
journal->j_journal = NULL;

OCFS2_I(inode)->ip_open_count--;
--
2.20.1