linux-stable/net/openvswitch/dp_notify.c
Pravin B Shelar 46df7b8145 openvswitch: Add support for network namespaces.
Following patch adds support for network namespace to openvswitch.
Since it must release devices when namespaces are destroyed, a
side effect of this patch is that the module no longer keeps a
refcount but instead cleans up any state when it is unloaded.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
2012-08-22 14:48:55 -07:00

68 lines
1.8 KiB
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 "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;
struct datapath *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)) {
netlink_set_err(ovs_dp_get_net(dp)->genl_sock, 0,
ovs_dp_vport_multicast_group.id,
PTR_ERR(notify));
break;
}
genlmsg_multicast_netns(ovs_dp_get_net(dp), 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
};