zebra: Add "show evpn vni detail" command

Change helps display detailed output for all possible VNIs without
specifying VNI. It helps in troubleshooting - a single command can
be fired to capture detailed info on all VNIs.

Ticket: CM-22831
Signed-off-by: Nitin Soni <nsoni@cumulusnetworks.com>
Reviewed-by: CCR-8013

zebra/zebra_vty.c

@@ -1782,7 +1782,7 @@ DEFUN (show_evpn_vni,
        "show evpn vni [json]",
        SHOW_STR
        "EVPN\n"
-       "VxLAN information\n"
+       "VxLAN Network Identifier\n"
        JSON_STR)
 {
 	struct zebra_vrf *zvrf;
@@ -1793,6 +1793,22 @@ DEFUN (show_evpn_vni,
 	return CMD_SUCCESS;
 }
 
+DEFUN (show_evpn_vni_detail, show_evpn_vni_detail_cmd,
+       "show evpn vni detail [json]",
+       SHOW_STR
+       "EVPN\n"
+       "VxLAN Network Identifier\n"
+       "Detailed Information On Each VNI\n"
+       JSON_STR)
+{
+	struct zebra_vrf *zvrf;
+	bool uj = use_json(argc, argv);
+
+	zvrf = vrf_info_lookup(VRF_DEFAULT);
+	zebra_vxlan_print_vnis_detail(vty, zvrf, uj);
+	return CMD_SUCCESS;
+}
+
 DEFUN (show_evpn_vni_vni,
        show_evpn_vni_vni_cmd,
        "show evpn vni " CMD_VNI_RANGE "[json]",
@@ -2743,6 +2759,7 @@ void zebra_vty_init(void)
 
 	install_element(VIEW_NODE, &show_evpn_global_cmd);
 	install_element(VIEW_NODE, &show_evpn_vni_cmd);
+	install_element(VIEW_NODE, &show_evpn_vni_detail_cmd);
 	install_element(VIEW_NODE, &show_evpn_vni_vni_cmd);
 	install_element(VIEW_NODE, &show_evpn_rmac_vni_mac_cmd);
 	install_element(VIEW_NODE, &show_evpn_rmac_vni_cmd);

zebra/zebra_vxlan.c

@@ -1195,6 +1195,35 @@ static void zl3vni_print_hash(struct hash_backet *backet, void *ctx[])
 	}
 }
 
+/* Private Structure to pass callback data for hash iterator */
+struct zvni_evpn_show {
+	struct vty *vty;
+	json_object *json;
+	struct zebra_vrf *zvrf;
+};
+
+/* print a L3 VNI hash entry in detail*/
+static void zl3vni_print_hash_detail(struct hash_backet *backet, void *data)
+{
+	struct vty *vty = NULL;
+	zebra_l3vni_t *zl3vni = NULL;
+	json_object *json = NULL;
+	bool use_json = false;
+	struct zvni_evpn_show *zes = data;
+
+	vty = zes->vty;
+	json = zes->json;
+
+	if (json)
+		use_json = true;
+
+	zl3vni = (zebra_l3vni_t *)backet->data;
+
+	zebra_vxlan_print_vni(vty, zes->zvrf, zl3vni->vni, use_json);
+	vty_out(vty, "\n");
+}
+
+
 /*
  * Print a VNI hash entry - called for display of all VNIs.
  */
@@ -1259,6 +1288,29 @@ static void zvni_print_hash(struct hash_backet *backet, void *ctxt[])
 	}
 }
 
+/*
+ * Print a VNI hash entry in detail - called for display of all VNIs.
+ */
+static void zvni_print_hash_detail(struct hash_backet *backet, void *data)
+{
+	struct vty *vty;
+	zebra_vni_t *zvni;
+	json_object *json = NULL;
+	bool use_json = false;
+	struct zvni_evpn_show *zes = data;
+
+	vty = zes->vty;
+	json = zes->json;
+
+	if (json)
+		use_json = true;
+
+	zvni = (zebra_vni_t *)backet->data;
+
+	zebra_vxlan_print_vni(vty, zes->zvrf, zvni->vni, use_json);
+	vty_out(vty, "\n");
+}
+
 /*
  * Inform BGP about local MACIP.
  */
@@ -5426,6 +5478,49 @@ void zebra_vxlan_print_vnis(struct vty *vty, struct zebra_vrf *zvrf,
 	}
 }
 
+/*
+ * Display VNI hash table in detail(VTY command handler).
+ */
+void zebra_vxlan_print_vnis_detail(struct vty *vty, struct zebra_vrf *zvrf,
+				   bool use_json)
+{
+	json_object *json = NULL;
+	struct zebra_ns *zns = NULL;
+	struct zvni_evpn_show zes;
+
+	if (!is_evpn_enabled())
+		return;
+
+	zns = zebra_ns_lookup(NS_DEFAULT);
+	if (!zns)
+		return;
+
+
+	if (use_json)
+		json = json_object_new_object();
+
+	zes.vty = vty;
+	zes.json = json;
+	zes.zvrf = zvrf;
+
+	/* Display all L2-VNIs */
+	hash_iterate(zvrf->vni_table, (void (*)(struct hash_backet *,
+						void *))zvni_print_hash_detail,
+		     &zes);
+
+	/* Display all L3-VNIs */
+	hash_iterate(zrouter.l3vni_table,
+		     (void (*)(struct hash_backet *,
+			       void *))zl3vni_print_hash_detail,
+		     &zes);
+
+	if (use_json) {
+		vty_out(vty, "%s\n", json_object_to_json_string_ext(
+					     json, JSON_C_TO_STRING_PRETTY));
+		json_object_free(json);
+	}
+}
+
 /*
  * Handle neighbor delete notification from the kernel (on a VLAN device
  * / L3 interface). This may result in either the neighbor getting deleted

zebra/zebra_vxlan.h

@@ -117,6 +117,9 @@ extern void zebra_vxlan_print_vni(struct vty *vty, struct zebra_vrf *zvrf,
 				  vni_t vni, bool use_json);
 extern void zebra_vxlan_print_vnis(struct vty *vty, struct zebra_vrf *zvrf,
 				   bool use_json);
+extern void zebra_vxlan_print_vnis_detail(struct vty *vty,
+					  struct zebra_vrf *zvrf,
+					  bool use_json);
 extern void zebra_vxlan_print_rmacs_l3vni(struct vty *vty, vni_t vni,
 					  bool use_json);
 extern void zebra_vxlan_print_rmacs_all_l3vni(struct vty *vty, bool use_json);