net: dsa: slave: Handle switchdev host mdb add/del

Add code to handle switchdev host mdb add/del. Since DSA uses one of
the switch ports as a transport to the host, we just need to add an
MDB on this port.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/slave.c

@@ -304,6 +304,13 @@ static int dsa_slave_port_obj_add(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
 		break;
+	case SWITCHDEV_OBJ_ID_HOST_MDB:
+		/* DSA can directly translate this to a normal MDB add,
+		 * but on the CPU port.
+		 */
+		err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
+				       trans);
+		break;
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
 					trans);
@@ -326,6 +333,12 @@ static int dsa_slave_port_obj_del(struct net_device *dev,
 	case SWITCHDEV_OBJ_ID_PORT_MDB:
 		err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
+	case SWITCHDEV_OBJ_ID_HOST_MDB:
+		/* DSA can directly translate this to a normal MDB add,
+		 * but on the CPU port.
+		 */
+		err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+		break;
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
 		err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
 		break;