ocfs2: clear journal dirty flag after shutdown journal

[ 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@oracle.com
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@versity.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index a30f636..13cf69a 100644 (file)
--- 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--;