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| author | Joseph Qi <joseph.qi@huawei.com> | 2015-06-15 14:36:01 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-08-12 16:33:15 +0200 |
| commit | 9c7fafb9e156840cc352ba5cdd2145baea835de4 (patch) | |
| tree | 24d1a76d7c54e85a5feca43eeadb290f1e27b511 /include/linux | |
| parent | 6e94fd8d05090f570c2718331f12b24bf86162cb (diff) | |
| download | lwn-9c7fafb9e156840cc352ba5cdd2145baea835de4.tar.gz lwn-9c7fafb9e156840cc352ba5cdd2145baea835de4.zip | |
jbd2: fix ocfs2 corrupt when updating journal superblock fails
commit 6f6a6fda294506dfe0e3e0a253bb2d2923f28f0a upstream.
If updating journal superblock fails after journal data has been
flushed, the error is omitted and this will mislead the caller as a
normal case. In ocfs2, the checkpoint will be treated successfully
and the other node can get the lock to update. Since the sb_start is
still pointing to the old log block, it will rewrite the journal data
during journal recovery by the other node. Thus the new updates will
be overwritten and ocfs2 corrupts. So in above case we have to return
the error, and ocfs2_commit_cache will take care of the error and
prevent the other node to do update first. And only after recovering
journal it can do the new updates.
The issue discussion mail can be found at:
https://oss.oracle.com/pipermail/ocfs2-devel/2015-June/010856.html
http://comments.gmane.org/gmane.comp.file-systems.ext4/48841
[ Fixed bug in patch which allowed a non-negative error return from
jbd2_cleanup_journal_tail() to leak out of jbd2_fjournal_flush(); this
was causing xfstests ext4/306 to fail. -- Ted ]
Reported-by: Yiwen Jiang <jiangyiwen@huawei.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Tested-by: Yiwen Jiang <jiangyiwen@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
[bwh: Backported to 3.2:
- Adjust context
- Don't drop j_checkpoint_mutex where we don't hold it]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/jbd2.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 5e29682c4508..4920c55c7625 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -974,7 +974,7 @@ extern struct journal_head * jbd2_journal_get_descriptor_buffer(journal_t *); int jbd2_journal_next_log_block(journal_t *, unsigned long long *); int jbd2_journal_get_log_tail(journal_t *journal, tid_t *tid, unsigned long *block); -void __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block); +int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block); /* Commit management */ extern void jbd2_journal_commit_transaction(journal_t *); @@ -1086,7 +1086,7 @@ extern int jbd2_journal_destroy (journal_t *); extern int jbd2_journal_recover (journal_t *journal); extern int jbd2_journal_wipe (journal_t *, int); extern int jbd2_journal_skip_recovery (journal_t *); -extern void jbd2_journal_update_sb_log_tail (journal_t *, tid_t, +extern int jbd2_journal_update_sb_log_tail (journal_t *, tid_t, unsigned long, int); extern void __jbd2_journal_abort_hard (journal_t *); extern void jbd2_journal_abort (journal_t *, int); |