/* * Copyright (c) 2007-2011 Nicira Networks. * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA */ #include <linux/netdevice.h>#include <net/genetlink.h> #include "datapath.h"#include "vport-internal_dev.h"#include "vport-netdev.h" static int dp_device_event(struct notifier_block *unused, unsigned long event,			   void *ptr){	struct net_device *dev = ptr;	struct vport *vport; 	if (ovs_is_internal_dev(dev))		vport = ovs_internal_dev_get_vport(dev);	else		vport = ovs_netdev_get_vport(dev); 	if (!vport)		return NOTIFY_DONE; 	switch (event) {	case NETDEV_UNREGISTER:		if (!ovs_is_internal_dev(dev)) {			struct sk_buff *notify; 			notify = ovs_vport_cmd_build_info(vport, 0, 0,							  OVS_VPORT_CMD_DEL);			ovs_dp_detach_port(vport);			if (IS_ERR(notify)) {				netlink_set_err(init_net.genl_sock, 0,						ovs_dp_vport_multicast_group.id,						PTR_ERR(notify));				break;			} 			genlmsg_multicast(notify, 0, ovs_dp_vport_multicast_group.id,					  GFP_KERNEL);		}		break;	} 	return NOTIFY_DONE;} struct notifier_block ovs_dp_device_notifier = {	.notifier_call = dp_device_event};