--- zzzz-none-000/linux-4.4.60/include/uapi/linux/openvswitch.h	2017-04-08 07:53:53.000000000 +0000
+++ hawkeye-5590-729/linux-4.4.60/include/uapi/linux/openvswitch.h	2022-03-30 14:21:53.000000000 +0000
@@ -253,6 +253,7 @@
 	OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
 				/* receiving upcalls */
 	OVS_VPORT_ATTR_STATS,	/* struct ovs_vport_stats */
+	OVS_VPORT_ATTR_MASTER,	/* Master device for this vport, device name */
 	__OVS_VPORT_ATTR_MAX
 };