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/*
* Copyright (c) 2007-2014 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
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/if.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/in_route.h>
#include <linux/inetdevice.h>
#include <linux/jhash.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/rculist.h>
#include <net/route.h>
#include <net/xfrm.h>
#include <net/icmp.h>
#include <net/ip.h>
#include <net/ip_tunnels.h>
#include <net/gre.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/protocol.h>
#include "datapath.h"
#include "vport.h"
#include "vport-netdev.h"
static struct vport_ops ovs_gre_vport_ops;
static struct vport *gre_tnl_create(const struct vport_parms *parms)
{
struct net *net = ovs_dp_get_net(parms->dp);
struct net_device *dev;
struct vport *vport;
vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
if (IS_ERR(vport))
return vport;
rtnl_lock();
dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
if (IS_ERR(dev)) {
rtnl_unlock();
ovs_vport_free(vport);
return ERR_CAST(dev);
}
dev_change_flags(dev, dev->flags | IFF_UP);
rtnl_unlock();
return vport;
}
static struct vport *gre_create(const struct vport_parms *parms)
{
struct vport *vport;
vport = gre_tnl_create(parms);
if (IS_ERR(vport))
return vport;
return ovs_netdev_link(vport, parms->name);
}
static int gre_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
struct dp_upcall_info *upcall)
{
return ovs_tunnel_get_egress_info(upcall, ovs_dp_get_net(vport->dp),
skb, IPPROTO_GRE, 0, 0);
}
static struct vport_ops ovs_gre_vport_ops = {
.type = OVS_VPORT_TYPE_GRE,
.create = gre_create,
.send = ovs_netdev_send,
.get_egress_tun_info = gre_get_egress_tun_info,
.destroy = ovs_netdev_tunnel_destroy,
.owner = THIS_MODULE,
};
static int __init ovs_gre_tnl_init(void)
{
return ovs_vport_ops_register(&ovs_gre_vport_ops);
}
static void __exit ovs_gre_tnl_exit(void)
{
ovs_vport_ops_unregister(&ovs_gre_vport_ops);
}
module_init(ovs_gre_tnl_init);
module_exit(ovs_gre_tnl_exit);
MODULE_DESCRIPTION("OVS: GRE switching port");
MODULE_LICENSE("GPL");
MODULE_ALIAS("vport-type-3");
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