crush/CrushWrapper: rebuild reverse maps after rebuilding crush map

The Objecter will crash when localized reads are enabled and two threads
attempt to rebuild the (invalidated) reverse maps concurrently. This
should address the issue for the Objecter use-case without the need to
add additional locking.

Fixes: https://tracker.ceph.com/issues/44311
Signed-off-by: Jason Dillaman <dillaman@redhat.com>

diff --git a/src/crush/CrushWrapper.h b/src/crush/CrushWrapper.h
index 8e3ceee48f664206de08a35e25770c0cdc07c7fa..ed4a90addc425d691bd0e232b51ea4e4faf3ec91 100644 (file)
--- a/src/crush/CrushWrapper.h
+++ b/src/crush/CrushWrapper.h
@@ -1331,6 +1331,7 @@ public:
       crush->max_devices = name_map.rbegin()->first + 1;
     }
     have_uniform_rules = !has_legacy_rule_ids();
+    build_rmaps();
   }
   int bucket_set_alg(int id, int alg);