FSMap: guard the ever_enabled_multiple decode

Signed-off-by: Greg Farnum <gfarnum@redhat.com>

diff --git a/src/mds/FSMap.cc b/src/mds/FSMap.cc
index 73e425da1507f73cefc06c8bc85ef47cf20a6d49..2fc9f3fbff8efa26eefd61c06725943237a77f2b 100644 (file)
--- a/src/mds/FSMap.cc
+++ b/src/mds/FSMap.cc
@@ -440,7 +440,9 @@ void FSMap::decode(bufferlist::iterator& p)
     ::decode(mds_roles, p);
     ::decode(standby_daemons, p);
     ::decode(standby_epochs, p);
-    ::decode(ever_enabled_multiple, p);
+    if (struct_v >= 7) {
+      ::decode(ever_enabled_multiple, p);
+    }
   }
 
   DECODE_FINISH(p);