[linux.git] / net / openvswitch / vport-gre.c

/*
 * 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;
	int err;

	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);
	}

	err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
	if (err < 0) {
		rtnl_delete_link(dev);
		rtnl_unlock();
		ovs_vport_free(vport);
		return ERR_PTR(err);
	}

	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 struct vport_ops ovs_gre_vport_ops = {
	.type		= OVS_VPORT_TYPE_GRE,
	.create		= gre_create,
	.send		= dev_queue_xmit,
	.destroy	= ovs_netdev_tunnel_destroy,
};

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");
Commit	Line	Data
aa310701	1	/*
8c8b1b83	2	* Copyright (c) 2007-2014 Nicira, Inc.
aa310701 PS	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
aa310701 PS	19	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	20
	21	#include <linux/if.h>
	22	#include <linux/skbuff.h>
	23	#include <linux/ip.h>
	24	#include <linux/if_tunnel.h>
	25	#include <linux/if_vlan.h>
	26	#include <linux/in.h>
aa310701 PS	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>
62b9c8d0	32	#include <linux/module.h>
aa310701 PS	33	#include <linux/workqueue.h>
	34	#include <linux/rculist.h>
	35	#include <net/route.h>
	36	#include <net/xfrm.h>
	37
	38	#include <net/icmp.h>
	39	#include <net/ip.h>
	40	#include <net/ip_tunnels.h>
	41	#include <net/gre.h>
	42	#include <net/net_namespace.h>
	43	#include <net/netns/generic.h>
	44	#include <net/protocol.h>
	45
	46	#include "datapath.h"
	47	#include "vport.h"
b2acd1dc	48	#include "vport-netdev.h"
aa310701	49
62b9c8d0 TG	50	static struct vport_ops ovs_gre_vport_ops;
62b9c8d0 TG	51
b2acd1dc	52	static struct vport gre_tnl_create(const struct vport_parms parms)
aa310701	53	{
b2acd1dc PS	54	struct net *net = ovs_dp_get_net(parms->dp);
b2acd1dc PS	55	struct net_device *dev;
e0bb8c44	56	struct vport *vport;
4b5b9ba5	57	int err;
e0bb8c44	58
b2acd1dc PS	59	vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
	60	if (IS_ERR(vport))
	61	return vport;
	62
	63	rtnl_lock();
	64	dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
	65	if (IS_ERR(dev)) {
	66	rtnl_unlock();
	67	ovs_vport_free(vport);
	68	return ERR_CAST(dev);
aa310701 PS	69	}
aa310701 PS	70
567c5e13	71	err = dev_change_flags(dev, dev->flags \| IFF_UP, NULL);
4b5b9ba5 MP	72	if (err < 0) {
	73	rtnl_delete_link(dev);
	74	rtnl_unlock();
	75	ovs_vport_free(vport);
	76	return ERR_PTR(err);
	77	}
aa310701	78
4b5b9ba5	79	rtnl_unlock();
b2acd1dc	80	return vport;
aa310701 PS	81	}
	82
	83	static struct vport gre_create(const struct vport_parms parms)
	84	{
aa310701	85	struct vport *vport;
aa310701	86
b2acd1dc	87	vport = gre_tnl_create(parms);
aa310701	88	if (IS_ERR(vport))
b2acd1dc	89	return vport;
aa310701	90
b2acd1dc	91	return ovs_netdev_link(vport, parms->name);
aa310701 PS	92	}
aa310701 PS	93
62b9c8d0	94	static struct vport_ops ovs_gre_vport_ops = {
aa310701 PS	95	.type = OVS_VPORT_TYPE_GRE,
aa310701 PS	96	.create = gre_create,
aec15924	97	.send = dev_queue_xmit,
b2acd1dc	98	.destroy = ovs_netdev_tunnel_destroy,
aa310701	99	};
62b9c8d0 TG	100
	101	static int __init ovs_gre_tnl_init(void)
	102	{
	103	return ovs_vport_ops_register(&ovs_gre_vport_ops);
	104	}
	105
	106	static void __exit ovs_gre_tnl_exit(void)
	107	{
	108	ovs_vport_ops_unregister(&ovs_gre_vport_ops);
	109	}
	110
	111	module_init(ovs_gre_tnl_init);
	112	module_exit(ovs_gre_tnl_exit);
	113
	114	MODULE_DESCRIPTION("OVS: GRE switching port");
	115	MODULE_LICENSE("GPL");
	116	MODULE_ALIAS("vport-type-3");