mds/FSMap: use DECODE_OLDEST to gate FSMap version

This throws a proper exception which can be handled.

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

diff --git a/src/mds/FSMap.cc b/src/mds/FSMap.cc
index f88e446571dc5717203169d60401b296cb6d24bc..72ea71f3a2063f88316c4941f5e3fe9d83c1bb54 100644 (file)
--- a/src/mds/FSMap.cc
+++ b/src/mds/FSMap.cc
@@ -656,8 +656,7 @@ void FSMap::encode(bufferlist& bl, uint64_t features) const
 void FSMap::decode(bufferlist::const_iterator& p)
 {
   DECODE_START(7, p);
-  if (struct_v <= 6)
-    ceph_abort("detected old mdsmap in mon stores");
+  DECODE_OLDEST(7);
   decode(epoch, p);
   decode(next_filesystem_id, p);
   decode(legacy_client_fscid, p);