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 56e93107214bbcb7c3bc2c6cf6ee17d66fd8eb64..a5c12386676c82416f172e49398b09db34b2f5dd 100644 (file)
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -2262,7 +2262,8 @@ 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);