zebra: Display local MAC cache

Add vtysh handler and backend function to display the local MAC cache. Signed-off-by: Vivek Venkatraman <[email protected]>
FRRouting · Dec 3, 2024 · 489a332 · 489a332
1 parent 732c135
commit 489a332
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diff --git a/zebra/zebra_l2_bridge_if.c b/zebra/zebra_l2_bridge_if.c
@@ -55,6 +55,27 @@
 #include "zebra/zebra_evpn_vxlan.h"
 #include "zebra/zebra_router.h"
 
+static void zebra_l2_brvlan_print_mac_hash(struct hash_bucket *bucket,
+                                          void *ctxt)
+{
+       struct zebra_l2_brvlan_mac_ctx *ctx;
+       struct vty *vty;
+       struct zebra_l2_brvlan_mac *bmac;
+       char buf[ETHER_ADDR_STRLEN];
+       struct interface *ifp;
+
+       ctx = (struct zebra_l2_brvlan_mac_ctx *)ctxt;
+       vty = (struct vty *)(ctx->arg);
+       bmac = (struct zebra_l2_brvlan_mac *)bucket->data;
+
+       prefix_mac2str(&bmac->macaddr, buf, sizeof(buf));
+       ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT),
+                                       bmac->ifindex);
+
+       vty_out(vty, "%-17s %-7u %s\n", buf, bmac->ifindex,
+               ifp ? ifp->name : "-");
+}
+
 static unsigned int zebra_l2_bridge_vlan_hash_keymake(const void *p)
 {
 	const struct zebra_l2_bridge_vlan *bvlan;
@@ -63,6 +84,42 @@ static unsigned int zebra_l2_bridge_vlan_hash_keymake(const void *p)
 	return jhash(&bvlan->vid, sizeof(bvlan->vid), 0);
 }
 
+void zebra_l2_brvlan_print_macs(struct vty *vty, struct interface *br_if,
+                               vlanid_t vid, bool uj)
+{
+       struct zebra_if *zif;
+       struct zebra_l2_bridge_if *br;
+       uint32_t num_macs;
+       struct zebra_l2_brvlan_mac_ctx ctx;
+
+       zif = (struct zebra_if *)br_if->info;
+       br = BRIDGE_FROM_ZEBRA_IF(zif);
+       if (!br) {
+               return;
+       }
+       if (!br->mac_table[vid]) {
+               vty_out(vty,
+                       "%% bridge %s VID %u does not have a MAC hash table\n",
+                       br_if->name, vid);
+               return;
+       }
+       num_macs = hashcount(br->mac_table[vid]);
+       if (!num_macs) {
+               vty_out(vty, "bridge %s VID %u - No local MACs\n", br_if->name,
+                       vid);
+               return;
+       }
+
+       vty_out(vty, "bridge %s VID %u - Number of local MACs: %u\n",
+               br_if->name, vid, num_macs);
+       vty_out(vty, "%-17s %-7s %-30s\n", "MAC", "IfIndex", "Interface");
+       memset(&ctx, 0, sizeof(ctx));
+       ctx.br_if = br_if;
+       ctx.vid = vid;
+       ctx.arg = vty;
+       hash_iterate(br->mac_table[vid], zebra_l2_brvlan_print_mac_hash, &ctx);
+}
+
 static bool zebra_l2_bridge_vlan_hash_cmp(const void *p1, const void *p2)
 {
 	const struct zebra_l2_bridge_vlan *bv1;

diff --git a/zebra/zebra_l2_bridge_if.h b/zebra/zebra_l2_bridge_if.h
@@ -64,6 +64,8 @@ extern int
 zebra_l2_bridge_if_vlan_access_bd_deref(struct zebra_evpn_access_bd *bd);
 extern int
 zebra_l2_bridge_if_vlan_access_bd_ref(struct zebra_evpn_access_bd *bd);
+extern void zebra_l2_brvlan_print_macs(struct vty *vty, struct interface *br_if,
+                                      vlanid_t vid, bool uj);
 extern int zebra_l2_bridge_if_del(struct interface *ifp);
 extern int zebra_l2_bridge_if_add(struct interface *ifp);
 extern int zebra_l2_bridge_if_cleanup(struct interface *ifp);

diff --git a/zebra/zebra_vty.c b/zebra/zebra_vty.c
@@ -3513,6 +3513,40 @@ DEFUN (show_evpn_neigh_vni_vtep,
 	return CMD_SUCCESS;
 }
 
+DEFPY(show_evpn_local_mac, show_evpn_local_mac_cmd,
+      "show evpn local-mac IFNAME$if_name (1-4094)$vid [json$json]",
+      SHOW_STR
+      "EVPN\n"
+      "Local MAC addresses\n"
+      "Interface Name\n"
+      "VLAN ID\n" JSON_STR)
+{
+	struct vrf *vrf = NULL;
+	struct interface *ifp = NULL;
+	bool found = false;
+	bool uj = use_json(argc, argv);
+
+	if (!if_name || !vid) {
+		return CMD_WARNING;
+	}
+
+	RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
+		ifp = if_lookup_by_name(if_name, vrf->vrf_id);
+		if (ifp) {
+			found = true;
+			break;
+		}
+	}
+
+	if (!found) {
+		vty_out(vty, "%% Can't find interface %s\n", if_name);
+		return CMD_WARNING;
+	}
+
+	zebra_l2_brvlan_print_macs(vty, ifp, vid, uj);
+	return CMD_SUCCESS;
+}
+
 /* policy routing contexts */
 DEFUN (show_pbr_ipset,
        show_pbr_ipset_cmd,
@@ -4447,6 +4481,7 @@ void zebra_vty_init(void)
 	install_element(VIEW_NODE, &show_evpn_neigh_vni_vtep_cmd);
 	install_element(VIEW_NODE, &show_evpn_neigh_vni_dad_cmd);
 	install_element(VIEW_NODE, &show_evpn_neigh_vni_all_dad_cmd);
+	install_element(VIEW_NODE, &show_evpn_local_mac_cmd);
 	install_element(ENABLE_NODE, &clear_evpn_dup_addr_cmd);
 	install_element(CONFIG_NODE, &evpn_accept_bgp_seq_cmd);
 	install_element(CONFIG_NODE, &no_evpn_accept_bgp_seq_cmd);