[linux-2.6-block.git] / net / openvswitch / vport-gre.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2007-2014 Nicira, Inc.
 */

#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, 0, NULL);
		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
c9422999	1	// SPDX-License-Identifier: GPL-2.0-only
aa310701	2	/*
8c8b1b83	3	* Copyright (c) 2007-2014 Nicira, Inc.
aa310701 PS	4	*/
aa310701 PS	5
aa310701 PS	6	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	7
	8	#include <linux/if.h>
	9	#include <linux/skbuff.h>
	10	#include <linux/ip.h>
	11	#include <linux/if_tunnel.h>
	12	#include <linux/if_vlan.h>
	13	#include <linux/in.h>
aa310701 PS	14	#include <linux/in_route.h>
	15	#include <linux/inetdevice.h>
	16	#include <linux/jhash.h>
	17	#include <linux/list.h>
	18	#include <linux/kernel.h>
62b9c8d0	19	#include <linux/module.h>
aa310701 PS	20	#include <linux/workqueue.h>
	21	#include <linux/rculist.h>
	22	#include <net/route.h>
	23	#include <net/xfrm.h>
	24
	25	#include <net/icmp.h>
	26	#include <net/ip.h>
	27	#include <net/ip_tunnels.h>
	28	#include <net/gre.h>
	29	#include <net/net_namespace.h>
	30	#include <net/netns/generic.h>
	31	#include <net/protocol.h>
	32
	33	#include "datapath.h"
	34	#include "vport.h"
b2acd1dc	35	#include "vport-netdev.h"
aa310701	36
62b9c8d0 TG	37	static struct vport_ops ovs_gre_vport_ops;
62b9c8d0 TG	38
b2acd1dc	39	static struct vport gre_tnl_create(const struct vport_parms parms)
aa310701	40	{
b2acd1dc PS	41	struct net *net = ovs_dp_get_net(parms->dp);
b2acd1dc PS	42	struct net_device *dev;
e0bb8c44	43	struct vport *vport;
4b5b9ba5	44	int err;
e0bb8c44	45
b2acd1dc PS	46	vport = ovs_vport_alloc(0, &ovs_gre_vport_ops, parms);
	47	if (IS_ERR(vport))
	48	return vport;
	49
	50	rtnl_lock();
	51	dev = gretap_fb_dev_create(net, parms->name, NET_NAME_USER);
	52	if (IS_ERR(dev)) {
	53	rtnl_unlock();
	54	ovs_vport_free(vport);
	55	return ERR_CAST(dev);
aa310701 PS	56	}
aa310701 PS	57
567c5e13	58	err = dev_change_flags(dev, dev->flags \| IFF_UP, NULL);
4b5b9ba5	59	if (err < 0) {
f3a63cce	60	rtnl_delete_link(dev, 0, NULL);
4b5b9ba5 MP	61	rtnl_unlock();
	62	ovs_vport_free(vport);
	63	return ERR_PTR(err);
	64	}
aa310701	65
4b5b9ba5	66	rtnl_unlock();
b2acd1dc	67	return vport;
aa310701 PS	68	}
	69
	70	static struct vport gre_create(const struct vport_parms parms)
	71	{
aa310701	72	struct vport *vport;
aa310701	73
b2acd1dc	74	vport = gre_tnl_create(parms);
aa310701	75	if (IS_ERR(vport))
b2acd1dc	76	return vport;
aa310701	77
b2acd1dc	78	return ovs_netdev_link(vport, parms->name);
aa310701 PS	79	}
aa310701 PS	80
62b9c8d0	81	static struct vport_ops ovs_gre_vport_ops = {
aa310701 PS	82	.type = OVS_VPORT_TYPE_GRE,
aa310701 PS	83	.create = gre_create,
aec15924	84	.send = dev_queue_xmit,
b2acd1dc	85	.destroy = ovs_netdev_tunnel_destroy,
aa310701	86	};
62b9c8d0 TG	87
	88	static int __init ovs_gre_tnl_init(void)
	89	{
	90	return ovs_vport_ops_register(&ovs_gre_vport_ops);
	91	}
	92
	93	static void __exit ovs_gre_tnl_exit(void)
	94	{
	95	ovs_vport_ops_unregister(&ovs_gre_vport_ops);
	96	}
	97
	98	module_init(ovs_gre_tnl_init);
	99	module_exit(ovs_gre_tnl_exit);
	100
	101	MODULE_DESCRIPTION("OVS: GRE switching port");
	102	MODULE_LICENSE("GPL");
	103	MODULE_ALIAS("vport-type-3");