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[3/3] Ceph fscache: Wait for completion of object initialization

Message ID c2d6ad79005983f3834fbe5b8e241281f74296fe.1388066937.git.liwang@ubuntukylin.com (mailing list archive)
State New, archived
Headers show

Commit Message

Li Wang Dec. 26, 2013, 2:29 p.m. UTC 
From: Yunchuan Wen <yunchuanwen@ubuntukylin.com>

The object store limit needs to be updated after writing,
and this can be done provided the corresponding object has already
been initialized. Current object initialization is done asynchrously,
which introduce a race if a file is opened, then immediately followed
by a writing, the initialization may have not completed, the code will
reach the ASSERT in fscache_submit_exclusive_op() to cause kernel
bug.

Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com>
Signed-off-by: Min Chen <minchen@ubuntukylin.com>
Signed-off-by: Li Wang <liwang@ubuntukylin.com>
---
 fs/ceph/cache.c |    1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index 8c44fdd..834f9f3 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -205,6 +205,7 @@  void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc,
 	ci->fscache = fscache_acquire_cookie(fsc->fscache,
 					     &ceph_fscache_inode_object_def,
 					     ci, true);
+	fscache_check_consistency(ci->fscache);
 done:
 	mutex_unlock(&inode->i_mutex);