diff options
| author | Joseph Qi | 2015-09-04 15:43:37 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2015-09-04 16:54:41 -0700 |
| commit | 512f62acbdf1ee81ce4882c85835f5420a1c304c (patch) | |
| tree | 0c34ad3fd96408a4c572634a939cb2769f129bd2 /fs/ocfs2/file.c | |
| parent | 81cf09edc793688cbf53c3082802571e2018f3ac (diff) | |
ocfs2: fix race between dio and recover orphan
During direct io the inode will be added to orphan first and then
deleted from orphan. There is a race window that the orphan entry will
be deleted twice and thus trigger the BUG when validating
OCFS2_DIO_ORPHANED_FL in ocfs2_del_inode_from_orphan.
ocfs2_direct_IO_write
...
ocfs2_add_inode_to_orphan
>>>>>>>> race window.
1) another node may rm the file and then down, this node
take care of orphan recovery and clear flag
OCFS2_DIO_ORPHANED_FL.
2) since rw lock is unlocked, it may race with another
orphan recovery and append dio.
ocfs2_del_inode_from_orphan
So take inode mutex lock when recovering orphans and make rw unlock at the
end of aio write in case of append dio.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reported-by: Yiwen Jiang <jiangyiwen@huawei.com>
Cc: Weiwei Wang <wangww631@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/file.c')
| -rw-r--r-- | fs/ocfs2/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c index 2eb11363b1f7..5d384a6cd696 100644 --- a/fs/ocfs2/file.c +++ b/fs/ocfs2/file.c @@ -2416,7 +2416,7 @@ relock: } no_sync: - if (unaligned_dio) { + if (unaligned_dio && ocfs2_iocb_is_unaligned_aio(iocb)) { ocfs2_iocb_clear_unaligned_aio(iocb); mutex_unlock(&OCFS2_I(inode)->ip_unaligned_aio); } |