ofproto: Guarantee uninstalled facets have no dp_packet_count.

facet_push_stats() implicitly assumes that uninstalled facets have
no dp_[packet|byte]_count.  This commit guarantees and enforces
this invariant.

Bug #4732.

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index 456dcb1971401090b474f96c52fa5053c51b24c1..61d08ea482997d15bae5dd40daa4edb83d10f4f7 100644 (file)
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -1526,6 +1526,8 @@ ofproto_flush_flows(struct ofproto *ofproto)
          * individually since we are about to blow away all the facets with
          * dpif_flow_flush(). */
         facet->installed = false;
+        facet->dp_packet_count = 0;
+        facet->dp_byte_count = 0;
         facet_remove(ofproto, facet);
     }
 
@@ -2401,6 +2403,9 @@ facet_uninstall(struct ofproto *p, struct facet *facet)
         facet->installed = false;
         facet->dp_packet_count = 0;
         facet->dp_byte_count = 0;
+    } else {
+        assert(facet->dp_packet_count == 0);
+        assert(facet->dp_byte_count == 0);
     }
 }