crush: rebuild shadow trees on removing crush rule

In case this is the last crush rule which is still referencing
a specific device class. Otherwise the device class might stay
hanging.

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
(cherry picked from commit 968b72d8595996ee4d2e1364264c4c8203532045)

diff --git a/src/crush/CrushWrapper.cc b/src/crush/CrushWrapper.cc
index 76c6afe60a5ce32535af0c088f30f4d2a0d86998..26954b8dee6dc4658dc111231434d4276297a51f 100644 (file)
--- a/src/crush/CrushWrapper.cc
+++ b/src/crush/CrushWrapper.cc
@@ -1667,7 +1667,7 @@ int CrushWrapper::remove_rule(int ruleno)
   crush->rules[ruleno] = NULL;
   rule_name_map.erase(ruleno);
   have_rmaps = false;
-  return 0;
+  return rebuild_roots_with_classes();
 }
 
 int CrushWrapper::bucket_adjust_item_weight(CephContext *cct, crush_bucket *bucket, int item, int weight)