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>
(cherry picked from commit 8b866794f5b3674c5e3ad9adceb5e3230d55a0e0)

diff --git a/src/crush/CrushWrapper.h b/src/crush/CrushWrapper.h
index 9dffe69c8a228a1fc0e0cd9381a12487fafd1c28..136ad53864995730fd746fed5cdc9a1abfa91a38 100644 (file)
--- a/src/crush/CrushWrapper.h
+++ b/src/crush/CrushWrapper.h
@@ -1321,6 +1321,7 @@ 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);