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ext4: fix data integrity for ext4_sync_fs

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Inode's data or non journaled quota may be written w/o jounral so we
_must_ send a barrier at the end of ext4_sync_fs. But it can be
skipped if journal commit will do it for us.

Also fix data integrity for nojournal mode.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Dmitry Monakhov
2013-06-12 22:25:07 -04:00
committed by Theodore Ts'o
parent 9ff8644624
commit 06a407f13d
2 changed files with 48 additions and 1 deletions
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13
include/linux/jbd2.h
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@@ -1374,6 +1374,19 @@ static inline u32 jbd2_chksum(journal_t *journal, u32 crc,
return *(u32 *)desc.ctx;
}
/* Return most recent uncommitted transaction */
static inline tid_t jbd2_get_latest_transaction(journal_t *journal)
{
tid_t tid;
read_lock(&journal->j_state_lock);
tid = journal->j_commit_request;
if (journal->j_running_transaction)
tid = journal->j_running_transaction->t_tid;
read_unlock(&journal->j_state_lock);
return tid;
}
#ifdef __KERNEL__
#define buffer_trace_init(bh) do {} while (0)