Add Openflow 1.3 test for asynchronous message control.
[sliver-openvswitch.git] / datapath / dp_notify.c
1 /*
2  * Copyright (c) 2007-2012 Nicira, Inc.
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>
21
22 #include "datapath.h"
23 #include "vport-internal_dev.h"
24 #include "vport-netdev.h"
25
26 static int dp_device_event(struct notifier_block *unused, unsigned long event,
27                            void *ptr)
28 {
29         struct net_device *dev = ptr;
30         struct vport *vport;
31
32         if (ovs_is_internal_dev(dev))
33                 vport = ovs_internal_dev_get_vport(dev);
34         else
35                 vport = ovs_netdev_get_vport(dev);
36
37         if (!vport)
38                 return NOTIFY_DONE;
39
40         switch (event) {
41         case NETDEV_UNREGISTER:
42                 if (!ovs_is_internal_dev(dev)) {
43                         struct sk_buff *notify;
44                         struct datapath *dp = vport->dp;
45
46                         notify = ovs_vport_cmd_build_info(vport, 0, 0,
47                                                           OVS_VPORT_CMD_DEL);
48                         ovs_dp_detach_port(vport);
49                         if (IS_ERR(notify)) {
50                                 netlink_set_err(GENL_SOCK(ovs_dp_get_net(dp)), 0,
51                                                 ovs_dp_vport_multicast_group.id,
52                                                 PTR_ERR(notify));
53                                 break;
54                         }
55
56                         genlmsg_multicast_netns(ovs_dp_get_net(dp), notify, 0,
57                                                 ovs_dp_vport_multicast_group.id,
58                                                 GFP_KERNEL);
59                 }
60                 break;
61
62         }
63
64         return NOTIFY_DONE;
65 }
66
67 struct notifier_block ovs_dp_device_notifier = {
68         .notifier_call = dp_device_event
69 };