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ceph: fscache: Wait for completion of object initialization

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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.

Tested-by: Milosz Tanski <milosz@adfin.com>
Signed-off-by: Yunchuan Wen <yunchuanwen@ubuntukylin.com>
Signed-off-by: Min Chen <minchen@ubuntukylin.com>
Signed-off-by: Li Wang <liwang@ubuntukylin.com>
This commit is contained in:
Yunchuan Wen 2013-12-26 06:29:28 -08:00 committed by Yan, Zheng
parent 32d3e148dd
commit f1fc4fee3b
1 changed files with 1 additions and 0 deletions
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fs/ceph/cache.c
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@ -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);