[ovs-dev,v2,05/14] ovn-northd: replace build_lswitch_input_port_sec with iterators

diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
index 838772bee..0f3818890 100644
--- a/northd/ovn-northd.c
+++ b/northd/ovn-northd.c
@@ -4750,46 +4750,40 @@  has_stateful_acl(struct ovn_datapath *od)
 }
 
 static void
-build_lswitch_input_port_sec(struct hmap *ports, struct hmap *datapaths,
-                             struct hmap *lflows)
+build_lswitch_input_port_sec_op(
+        struct ovn_port *op, struct hmap *lflows,
+        struct ds *match, struct ds *actions)
 {
     /* Logical switch ingress table 0: Ingress port security - L2
      *  (priority 50).
      *  Ingress table 1: Ingress port security - IP (priority 90 and 80)
      *  Ingress table 2: Ingress port security - ND (priority 90 and 80)
      */
-    struct ds actions = DS_EMPTY_INITIALIZER;
-    struct ds match = DS_EMPTY_INITIALIZER;
-    struct ovn_port *op;
-
-    HMAP_FOR_EACH (op, key_node, ports) {
-        if (!op->nbsp) {
-            continue;
-        }
 
+    if (op->nbsp) {
         if (!lsp_is_enabled(op->nbsp)) {
             /* Drop packets from disabled logical ports (since logical flow
              * tables are default-drop). */
-            continue;
+            return;
         }
 
         if (lsp_is_external(op->nbsp)) {
-            continue;
+            return;
         }
 
-        ds_clear(&match);
-        ds_clear(&actions);
-        ds_put_format(&match, "inport == %s", op->json_key);
+        ds_clear(match);
+        ds_clear(actions);
+        ds_put_format(match, "inport == %s", op->json_key);
         build_port_security_l2("eth.src", op->ps_addrs, op->n_ps_addrs,
-                               &match);
+                               match);
 
         const char *queue_id = smap_get(&op->sb->options, "qdisc_queue_id");
         if (queue_id) {
-            ds_put_format(&actions, "set_queue(%s); ", queue_id);
+            ds_put_format(actions, "set_queue(%s); ", queue_id);
         }
-        ds_put_cstr(&actions, "next;");
+        ds_put_cstr(actions, "next;");
         ovn_lflow_add_with_hint(lflows, op->od, S_SWITCH_IN_PORT_SEC_L2, 50,
-                                ds_cstr(&match), ds_cstr(&actions),
+                                ds_cstr(match), ds_cstr(actions),
                                 &op->nbsp->header_);
 
         if (op->nbsp->n_port_security) {
@@ -4797,22 +4791,19 @@  build_lswitch_input_port_sec(struct hmap *ports, struct hmap *datapaths,
             build_port_security_nd(op, lflows, &op->nbsp->header_);
         }
     }
+}
 
+static void
+build_lswitch_input_port_sec_od(
+        struct ovn_datapath *od, struct hmap *lflows)
+{
     /* Ingress table 1 and 2: Port security - IP and ND, by default
      * goto next. (priority 0)
      */
-    struct ovn_datapath *od;
-    HMAP_FOR_EACH (od, key_node, datapaths) {
-        if (!od->nbs) {
-            continue;
-        }
-
+   if (od->nbs) {
         ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_ND, 0, "1", "next;");
         ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_IP, 0, "1", "next;");
     }
-
-    ds_destroy(&match);
-    ds_destroy(&actions);
 }
 
 static void
@@ -6775,6 +6766,8 @@  build_lswitch_flows(struct hmap *datapaths, struct hmap *ports,
     /* Build pre-ACL and ACL tables for both ingress and egress.
      * Ingress tables 3 through 10.  Egress tables 0 through 7. */
     struct ovn_datapath *od;
+    struct ovn_port *op;
+
     HMAP_FOR_EACH (od, key_node, datapaths) {
         build_lswitch_flows_pre_acl_and_acl(od, lflows,
                     port_groups, meter_groups, lbs);
@@ -6789,12 +6782,17 @@  build_lswitch_flows(struct hmap *datapaths, struct hmap *ports,
         build_lswitch_ingress_admission_control(od, lflows);
     }
 
-    build_lswitch_input_port_sec(ports, datapaths, lflows);
+    HMAP_FOR_EACH (op, key_node, ports) {
+        build_lswitch_input_port_sec_op(op, lflows, &match, &actions);
+    }
+
+    HMAP_FOR_EACH (od, key_node, datapaths) {
+         build_lswitch_input_port_sec_od(od, lflows);
+    }
 
     /* Ingress table 13: ARP/ND responder, skip requests coming from localnet
      * and vtep ports. (priority 100); see ovn-northd.8.xml for the
      * rationale. */
-    struct ovn_port *op;
     HMAP_FOR_EACH (op, key_node, ports) {
         if (!op->nbsp) {
             continue;