[linux-2.6-block.git] / net / openvswitch / dp_notify.c

/*
 * 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) {
				if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
					continue;

				if (!(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
};
Commit	Line	Data
ccb1352e	1	/*
caf2ee14	2	* Copyright (c) 2007-2012 Nicira, Inc.
ccb1352e JG	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of version 2 of the GNU General Public
	6	* License as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	16	* 02110-1301, USA
	17	*/
	18
	19	#include <linux/netdevice.h>
	20	#include <net/genetlink.h>
8e4e1713	21	#include <net/netns/generic.h>
ccb1352e JG	22
	23	#include "datapath.h"
	24	#include "vport-internal_dev.h"
	25	#include "vport-netdev.h"
	26
8e4e1713 PS	27	static void dp_detach_port_notify(struct vport *vport)
	28	{
	29	struct sk_buff *notify;
	30	struct datapath *dp;
	31
	32	dp = vport->dp;
	33	notify = ovs_vport_cmd_build_info(vport, 0, 0,
	34	OVS_VPORT_CMD_DEL);
	35	ovs_dp_detach_port(vport);
	36	if (IS_ERR(notify)) {
68eb5503	37	genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
2a94fe48	38	0, PTR_ERR(notify));
8e4e1713 PS	39	return;
	40	}
	41
68eb5503 JB	42	genlmsg_multicast_netns(&dp_vport_genl_family,
68eb5503 JB	43	ovs_dp_get_net(dp), notify, 0,
2a94fe48	44	0, GFP_KERNEL);
8e4e1713 PS	45	}
	46
	47	void ovs_dp_notify_wq(struct work_struct *work)
	48	{
	49	struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
	50	struct datapath *dp;
	51
	52	ovs_lock();
	53	list_for_each_entry(dp, &ovs_net->dps, list_node) {
	54	int i;
	55
	56	for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
	57	struct vport *vport;
	58	struct hlist_node *n;
	59
	60	hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
13175303	61	if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
8e4e1713 PS	62	continue;
8e4e1713 PS	63
be4ace6e	64	if (!(vport->dev->priv_flags & IFF_OVS_DATAPATH))
8e4e1713 PS	65	dp_detach_port_notify(vport);
	66	}
	67	}
	68	}
	69	ovs_unlock();
	70	}
	71
ccb1352e JG	72	static int dp_device_event(struct notifier_block *unused, unsigned long event,
	73	void *ptr)
	74	{
8e4e1713	75	struct ovs_net *ovs_net;
351638e7	76	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
8e4e1713	77	struct vport *vport = NULL;
ccb1352e	78
8e4e1713	79	if (!ovs_is_internal_dev(dev))
ccb1352e JG	80	vport = ovs_netdev_get_vport(dev);
	81
	82	if (!vport)
	83	return NOTIFY_DONE;
	84
8e4e1713	85	if (event == NETDEV_UNREGISTER) {
b07c2651 AS	86	/* upper_dev_unlink and decrement promisc immediately */
	87	ovs_netdev_detach_dev(vport);
	88
	89	/* schedule vport destroy, dev_put and genl notification */
8e4e1713 PS	90	ovs_net = net_generic(dev_net(dev), ovs_net_id);
8e4e1713 PS	91	queue_work(system_wq, &ovs_net->dp_notify_work);
ccb1352e JG	92	}
	93
	94	return NOTIFY_DONE;
	95	}
	96
	97	struct notifier_block ovs_dp_device_notifier = {
	98	.notifier_call = dp_device_event
	99	};