mon/PGMap: fix incorrect pg_pool_sum when delete pool

We found the pools num diplayed by "ceph -s" is not the same with
"ceph osd lspools" after deleting a pool sometime. The result is
Mgr ClusterState::ingest_pgstats get the old pg_stat which pg is
not deleted in some osd before the pool deleted and add to
pending_inc.pool_statfs_updates. The deleted pool will be added to
pg_pool_sum unconsciously by PGMap::apply_incremental and which has
been deleted in OSDMap. This will also casue MON's Segmentation
fault.

Fixes: https://tracker.ceph.com/issues/42689
Fixes: https://tracker.ceph.com/issues/42592
Fixes: https://tracker.ceph.com/issues/41228
Fixes: https://tracker.ceph.com/issues/40011
Signed-off-by: luo rixin <luorixin@huawei.com>

diff --git a/src/mon/PGMap.cc b/src/mon/PGMap.cc
index ee4334f2ac39a77f3f0e7d492e581ce6f438253f..e1ce677436cfeb406ee7ddfc23b70b7dcc834bec 100644 (file)
--- a/src/mon/PGMap.cc
+++ b/src/mon/PGMap.cc
@@ -1175,14 +1175,16 @@ void PGMap::apply_incremental(CephContext *cct, const Incremental& inc)
 
     auto pool_statfs_iter =
       pool_statfs.find(std::make_pair(update_pool, update_osd));
-    pool_stat_t &pool_sum_ref = pg_pool_sum[update_pool];
-    if (pool_statfs_iter == pool_statfs.end()) {
-      pool_statfs.emplace(std::make_pair(update_pool, update_osd), statfs_inc);
-    } else {
-      pool_sum_ref.sub(pool_statfs_iter->second);
-      pool_statfs_iter->second = statfs_inc;
+    if (pg_pool_sum.count(update_pool)) { 
+      pool_stat_t &pool_sum_ref = pg_pool_sum[update_pool];
+      if (pool_statfs_iter == pool_statfs.end()) {
+        pool_statfs.emplace(std::make_pair(update_pool, update_osd), statfs_inc);
+      } else {
+        pool_sum_ref.sub(pool_statfs_iter->second);
+        pool_statfs_iter->second = statfs_inc;
+      }
+      pool_sum_ref.add(statfs_inc);
     }
-    pool_sum_ref.add(statfs_inc);
   }
 
   for (auto p = inc.get_osd_stat_updates().begin();