Log which loadbalancer already exists when adding fails

Author: PlagueCZ

src/dp_lb.c

@@ -71,8 +71,11 @@ int dp_create_lb(struct dpgrpc_lb *lb, const union dp_ipv6 *ul_ip)
 	lb_key.vni = lb->vni;
 	dp_copy_ipaddr(&lb_key.ip, &lb->addr);
 
-	if (DP_SUCCESS(rte_hash_lookup(lb_table, &lb_key)))
+	if (DP_SUCCESS(rte_hash_lookup_data(lb_table, &lb_key, (void **)&lb_val))) {
+		DPS_LOG_WARNING("Loadbalancer for this IP already exists",
+						DP_LOG_IPV4(lb->addr.ipv4), DP_LOG_VNI(lb->vni), DP_LOG_LBID(lb_val->lb_id));
 		return DP_GRPC_ERR_ALREADY_EXISTS;
+	}
 
 	lb_val = rte_zmalloc("lb_val", sizeof(struct lb_value), RTE_CACHE_LINE_SIZE);
 	if (!lb_val)