snap_types: fix encode/decode for the newly added fiels in SnapRealmInfoNew

Signed-off-by: Venky Shankar <[email protected]>

Author: vshankar

src/common/snap_types.cc

@@ -61,7 +61,7 @@ std::list<SnapRealmInfo> SnapRealmInfo::generate_test_instances()
 void SnapRealmInfoNew::encode(ceph::buffer::list& bl) const
 {
   using ceph::encode;
-  ENCODE_START(1, 1, bl);
+  ENCODE_START(2, 1, bl);
   encode(info, bl);
   encode(last_modified, bl);
   encode(change_attr, bl);
@@ -72,11 +72,13 @@ void SnapRealmInfoNew::encode(ceph::buffer::list& bl) const
 void SnapRealmInfoNew::decode(ceph::buffer::list::const_iterator& bl)
 {
   using ceph::decode;
-  DECODE_START(1, bl);
+  DECODE_START(2, bl);
   decode(info, bl);
   decode(last_modified, bl);
   decode(change_attr, bl);
-  decode(flags, bl);
+  if (struct_v >= 2) {
+    decode(flags, bl);
+  }
   DECODE_FINISH(bl);
 }