mds: skip fetching the dirfrags if not a directory

The backtrace in openfile table maybe out-of-date, just skip fetching
dirfrags instead of crash the MDS.

Fixes: https://tracker.ceph.com/issues/54384
Signed-off-by: Xiubo Li <xiubli@redhat.com>

diff --git a/src/mds/OpenFileTable.cc b/src/mds/OpenFileTable.cc
index 8436e5e7d1d69738b9cdb558c71ad9c418fbc6e9..4322b6a8a7d59cabd985c46ff9526c946001d412 100644 (file)
--- a/src/mds/OpenFileTable.cc
+++ b/src/mds/OpenFileTable.cc
@@ -1061,6 +1061,12 @@ void OpenFileTable::_prefetch_dirfrags()
     CInode *diri = mdcache->get_inode(ino);
     if (!diri)
       continue;
+
+    if (!diri->is_dir()) {
+      dout(10) << " " << *diri << " is not dir" << dendl;
+      continue;
+    }
+
     if (diri->state_test(CInode::STATE_REJOINUNDEF))
       continue;