2 * Copyright (c) 2007-2014 Nicira, Inc.
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.
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.
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
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22 #include <linux/skbuff.h>
24 #include <linux/if_tunnel.h>
25 #include <linux/if_vlan.h>
27 #include <linux/in_route.h>
28 #include <linux/inetdevice.h>
29 #include <linux/jhash.h>
30 #include <linux/list.h>
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/workqueue.h>
34 #include <linux/rculist.h>
35 #include <net/route.h>
40 #include <net/ip_tunnels.h>
42 #include <net/net_namespace.h>
43 #include <net/netns/generic.h>
44 #include <net/protocol.h>
48 #include "vport-netdev.h"
50 static struct vport_ops ovs_gre_vport_ops;
52 static struct vport *gre_tnl_create(const struct vport_parms *parms)
54 struct net *net = ovs_dp_get_net(parms->dp);
55 struct net_device *dev;
59 vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
64 dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
67 ovs_vport_free(vport);
71 err = dev_change_flags(dev, dev->flags | IFF_UP);
73 rtnl_delete_link(dev);
75 ovs_vport_free(vport);
83 static struct vport *gre_create(const struct vport_parms *parms)
87 vport = gre_tnl_create(parms);
91 return ovs_netdev_link(vport, parms->name);
94 static struct vport_ops ovs_gre_vport_ops = {
95 .type = OVS_VPORT_TYPE_GRE,
97 .send = dev_queue_xmit,
98 .destroy = ovs_netdev_tunnel_destroy,
101 static int __init ovs_gre_tnl_init(void)
103 return ovs_vport_ops_register(&ovs_gre_vport_ops);
106 static void __exit ovs_gre_tnl_exit(void)
108 ovs_vport_ops_unregister(&ovs_gre_vport_ops);
111 module_init(ovs_gre_tnl_init);
112 module_exit(ovs_gre_tnl_exit);
114 MODULE_DESCRIPTION("OVS: GRE switching port");
115 MODULE_LICENSE("GPL");
116 MODULE_ALIAS("vport-type-3");