osd: pg_stat_t: throw exception on unknown encoding

This is better then decoding nonsense, eating ram, etc.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/src/osd/osd_types.h b/src/osd/osd_types.h
index ab07b1bb10e24350af467ba82299e4758d755d9b..997793c022ac7382ea2b37ea65b8186b5cb32544 100644 (file)
--- a/src/osd/osd_types.h
+++ b/src/osd/osd_types.h
@@ -993,6 +993,8 @@ struct pg_stat_t {
   void decode(bufferlist::iterator &bl) {
     __u8 v;
     ::decode(v, bl);
+    if (v > 4)
+      throw buffer::malformed_input("unknown pg_stat_t encoding version > 4");
 
     ::decode(version, bl);
     ::decode(reported, bl);