switchdev: Adding MDB entry offload

Define HW multicast entry: MAC and VID.
Using a MAC address simplifies support for both IPV4 and IPv6.
Signed-off-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/switchdev.h

@@ -68,6 +68,7 @@ enum switchdev_obj_id {
 	SWITCHDEV_OBJ_ID_PORT_VLAN,
 	SWITCHDEV_OBJ_ID_IPV4_FIB,
 	SWITCHDEV_OBJ_ID_PORT_FDB,
+	SWITCHDEV_OBJ_ID_PORT_MDB,
 };
 
 struct switchdev_obj {
@@ -113,6 +114,16 @@ struct switchdev_obj_port_fdb {
 #define SWITCHDEV_OBJ_PORT_FDB(obj) \
 	container_of(obj, struct switchdev_obj_port_fdb, obj)
 
+/* SWITCHDEV_OBJ_ID_PORT_MDB */
+struct switchdev_obj_port_mdb {
+	struct switchdev_obj obj;
+	unsigned char addr[ETH_ALEN];
+	u16 vid;
+};
+
+#define SWITCHDEV_OBJ_PORT_MDB(obj) \
+	container_of(obj, struct switchdev_obj_port_mdb, obj)
+
 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
 				  void *data, void (*destructor)(void const *),
 				  struct switchdev_trans_item *tritem);

net/switchdev/switchdev.c

@@ -345,6 +345,8 @@ static size_t switchdev_obj_size(const struct switchdev_obj *obj)
 		return sizeof(struct switchdev_obj_ipv4_fib);
 	case SWITCHDEV_OBJ_ID_PORT_FDB:
 		return sizeof(struct switchdev_obj_port_fdb);
+	case SWITCHDEV_OBJ_ID_PORT_MDB:
+		return sizeof(struct switchdev_obj_port_mdb);
 	default:
 		BUG();
 	}