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authorJoseph Qi <joseph.qi@huawei.com>2015-09-05 01:43:37 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-05 02:54:41 +0300
commit512f62acbdf1ee81ce4882c85835f5420a1c304c (patch)
tree0c34ad3fd96408a4c572634a939cb2769f129bd2 /fs/ocfs2/file.c
parent81cf09edc793688cbf53c3082802571e2018f3ac (diff)
downloadlinux-512f62acbdf1ee81ce4882c85835f5420a1c304c.tar.xz
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.c2
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);
}