zebra: multiple vlan aware bridge data structure and related changes

Multiple vlan aware bridge data structure changes and its corresponding bridge
handling changes.
A new vlan-table is maintained for each bridge which records the zebra_l2_bridge_vlan
entry. zebra_l2_bridge_vlan maps vlan to access_bd associated to this bridge.

Existing zebra_evpn_access_bd structure is vlan aware which is now modified to be
(vlan, bridge) aware.

Whenever a new access_bd is instantiated, a corresponding entry is also recorded
in the zebra l2 bridge for the vlan.
When the access_bd is dereferenced or whenever a bridge is deleted, the
association is cleaned up.

Signed-off-by: Sharath Ramamurthy <sramamurthy@nvidia.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/zebra/zebra_l2_bridge_if.h b/zebra/zebra_l2_bridge_if.h
new file mode 100644
index 0000000000..734ecfdcf1
--- /dev/null
+++ b/zebra/zebra_l2_bridge_if.h
@@ -0,0 +1,75 @@
+/*
+ * Zebra L2 bridge interface data structures and definitions
+ * These are public definitions referenced by other files.
+ * Copyright (C) 2021 Cumulus Networks, Inc.
+ * Sharath Ramamurthy
+ *
+ * This file is part of FRR.
+ *
+ * FRR is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * FRR is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with FRR; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_L2_BRIDGE_IF_H
+#define _ZEBRA_L2_BRIDGE_IF_H
+
+#include <zebra.h>
+#include <zebra/zebra_router.h>
+
+#include "linklist.h"
+#include "if.h"
+#include "vlan.h"
+#include "vxlan.h"
+
+#include "lib/json.h"
+#include "zebra/zebra_vrf.h"
+#include "zebra/zserv.h"
+
+#include "zebra/zebra_dplane.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Bridge interface change flags of interest. */
+#define ZEBRA_BRIDGEIF_ACCESS_BD_CHANGE (1 << 0)
+
+extern struct zebra_l2_bridge_vlan *
+zebra_l2_bridge_if_vlan_find(const struct zebra_if *zif, vlanid_t vid);
+extern vni_t zebra_l2_bridge_if_vni_find(const struct zebra_if *zif,
+					 vlanid_t vid);
+extern void zebra_l2_bridge_if_vlan_iterate(
+	struct zebra_if *zif,
+	int (*func)(struct zebra_if *zif, struct zebra_l2_bridge_vlan *,
+		    void *),
+	void *arg);
+extern void
+zebra_l2_bridge_if_vlan_walk(struct zebra_if *zif,
+			     int (*func)(struct zebra_if *zif,
+					 struct zebra_l2_bridge_vlan *, void *),
+			     void *arg);
+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 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);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZEBRA_L2_BRIDGE_IF_H */