-/* Obtains statistic counters for 'rule' within 'p' and stores them into
- * '*packet_countp' and '*byte_countp'. The returned statistics include
- * statistics for all of 'rule''s facets. */
-static void
-query_stats(struct ofproto *p, struct rule *rule,
- uint64_t *packet_countp, uint64_t *byte_countp)
-{
- uint64_t packet_count, byte_count;
- struct facet *facet;
- struct odp_flow *odp_flows;
- size_t n_odp_flows;
-
- /* Start from historical data for 'rule' itself that are no longer tracked
- * by the datapath. This counts, for example, facets that have expired. */
- packet_count = rule->packet_count;
- byte_count = rule->byte_count;
-
- /* Prepare to ask the datapath for statistics on all of the rule's facets.
- *
- * Also, add any statistics that are not tracked by the datapath for each
- * facet. This includes, for example, statistics for packets that were
- * executed "by hand" by ofproto via dpif_execute() but must be accounted
- * to a rule. */
- odp_flows = xzalloc(list_size(&rule->facets) * sizeof *odp_flows);
- n_odp_flows = 0;
- LIST_FOR_EACH (facet, list_node, &rule->facets) {
- struct odp_flow *odp_flow = &odp_flows[n_odp_flows++];
- odp_flow_key_from_flow(&odp_flow->key, &facet->flow);
- packet_count += facet->packet_count;
- byte_count += facet->byte_count;
- }
-
- /* Fetch up-to-date statistics from the datapath and add them in. */
- if (!dpif_flow_get_multiple(p->dpif, odp_flows, n_odp_flows)) {
- size_t i;
-
- for (i = 0; i < n_odp_flows; i++) {
- struct odp_flow *odp_flow = &odp_flows[i];
- packet_count += odp_flow->stats.n_packets;
- byte_count += odp_flow->stats.n_bytes;
- }
- }
- free(odp_flows);
-
- /* Return the stats to the caller. */
- *packet_countp = packet_count;
- *byte_countp = byte_count;
-}
-