/* * Copyright (c) 2007-2012 Nicira, Inc. * * 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 <net/netns/generic.h> #include "datapath.h"#include "vport-internal_dev.h"#include "vport-netdev.h" static void dp_detach_port_notify(struct vport *vport){	struct sk_buff *notify;	struct datapath *dp; 	dp = vport->dp;	notify = ovs_vport_cmd_build_info(vport, 0, 0,					  OVS_VPORT_CMD_DEL);	ovs_dp_detach_port(vport);	if (IS_ERR(notify)) {		genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,			     0, PTR_ERR(notify));		return;	} 	genlmsg_multicast_netns(&dp_vport_genl_family,				ovs_dp_get_net(dp), notify, 0,				0, GFP_KERNEL);} void ovs_dp_notify_wq(struct work_struct *work){	struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);	struct datapath *dp; 	ovs_lock();	list_for_each_entry(dp, &ovs_net->dps, list_node) {		int i; 		for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {			struct vport *vport;			struct hlist_node *n; 			hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {				struct netdev_vport *netdev_vport; 				if (vport->ops->type != OVS_VPORT_TYPE_NETDEV)					continue; 				netdev_vport = netdev_vport_priv(vport);				if (!(netdev_vport->dev->priv_flags & IFF_OVS_DATAPATH))					dp_detach_port_notify(vport);			}		}	}	ovs_unlock();} static int dp_device_event(struct notifier_block *unused, unsigned long event,			   void *ptr){	struct ovs_net *ovs_net;	struct net_device *dev = netdev_notifier_info_to_dev(ptr);	struct vport *vport = NULL; 	if (!ovs_is_internal_dev(dev))		vport = ovs_netdev_get_vport(dev); 	if (!vport)		return NOTIFY_DONE; 	if (event == NETDEV_UNREGISTER) {		/* upper_dev_unlink and decrement promisc immediately */		ovs_netdev_detach_dev(vport); 		/* schedule vport destroy, dev_put and genl notification */		ovs_net = net_generic(dev_net(dev), ovs_net_id);		queue_work(system_wq, &ovs_net->dp_notify_work);	} 	return NOTIFY_DONE;} struct notifier_block ovs_dp_device_notifier = {	.notifier_call = dp_device_event};