#define NETDEV_BONDING_INFO 0x0019
#define NETDEV_PRECHANGEUPPER 0x001A
#define NETDEV_CHANGELOWERSTATE 0x001B
+#define NETDEV_OFFLOAD_PUSH_VXLAN 0x001C
int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);