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authorTristan Ye <tristan.ye@oracle.com>2010-12-07 14:35:07 +0800
committerJoel Becker <joel.becker@oracle.com>2010-12-09 15:36:48 -0800
commit39c99f12f15c8bf8257985d9b2a2548a03d18c00 (patch)
tree38f09ce41f6cbfd3a73b1dc66098ba3bf05e2d6a /fs/ocfs2/aops.c
parent388c4bcb4e63e88fb1f312a2f5f9eb2623afcf5b (diff)
downloadlinux-39c99f12f15c8bf8257985d9b2a2548a03d18c00.tar.bz2
Ocfs2: Teach 'coherency=full' O_DIRECT writes to correctly up_read i_alloc_sem.
Due to newly-introduced 'coherency=full' O_DIRECT writes also takes the EX rw_lock like buffered writes did(rw_level == 1), it turns out messing the usage of 'level' in ocfs2_dio_end_io() up, which caused i_alloc_sem being failed to get up_read'd correctly. This patch tries to teach ocfs2_dio_end_io to understand well on all locking stuffs by explicitly introducing a new bit for i_alloc_sem in iocb's private data, just like what we did for rw_lock. Signed-off-by: Tristan Ye <tristan.ye@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/aops.c')
-rw-r--r--fs/ocfs2/aops.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index f1e962cb3b73..0d7c5540ad66 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -573,11 +573,14 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
/* this io's submitter should not have unlocked this before we could */
BUG_ON(!ocfs2_iocb_is_rw_locked(iocb));
+ if (ocfs2_iocb_is_sem_locked(iocb)) {
+ up_read(&inode->i_alloc_sem);
+ ocfs2_iocb_clear_sem_locked(iocb);
+ }
+
ocfs2_iocb_clear_rw_locked(iocb);
level = ocfs2_iocb_rw_locked_level(iocb);
- if (!level)
- up_read(&inode->i_alloc_sem);
ocfs2_rw_unlock(inode, level);
if (is_async)