cls/rbd: set_features should adjust the mask to known features

Signed-off-by: Jason Dillaman <dillaman@redhat.com>

diff --git a/src/cls/rbd/cls_rbd.cc b/src/cls/rbd/cls_rbd.cc
index f7bf2e33411012acfd111d186f36649402ba1f5e..c90bc335326328981712f6cf2a5f494ee2be4678 100644 (file)
--- a/src/cls/rbd/cls_rbd.cc
+++ b/src/cls/rbd/cls_rbd.cc
@@ -414,6 +414,9 @@ int set_features(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
     return r;
   }
 
+  // newer clients might attempt to mask off features we don't support
+  mask &= RBD_FEATURES_ALL;
+
   uint64_t enabled_features = features & mask;
   if ((enabled_features & RBD_FEATURES_MUTABLE) != enabled_features) {
     CLS_ERR("Attempting to enable immutable feature: %" PRIu64,