mds: skip fragment space check for replayed request

when handling replayed request, stray directory can be different
from the stray directory used by the original request. The fragment
space check for stray directory can fail.

Fixes: http://tracker.ceph.com/issues/18660
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
(cherry picked from commit afe889cbc5baab196567c2aad01f49fe90901fda)

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 4fa218980f2e5a8a946b66feb6a0ef3741437f4a..007ee12802ee0c6e3ba49c44542eb105e933f0a5 100644 (file)
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -2270,7 +2270,8 @@ CDentry* Server::prepare_stray_dentry(MDRequestRef& mdr, CInode *in)
 
   CDir *straydir = mdcache->get_stray_dir(in);
 
-  if (!check_fragment_space(mdr, straydir))
+  if (!mdr->client_request->is_replay() &&
+      !check_fragment_space(mdr, straydir))
     return NULL;
 
   straydn = mdcache->get_or_create_stray_dentry(in);