linux/net/openvswitch/vport-vxlan.c
Thomas Gleixner c942299924 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 269
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 21 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141334.228102212@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:30:29 +02:00

170 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014 Nicira, Inc.
* Copyright (c) 2013 Cisco Systems, Inc.
*/
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/openvswitch.h>
#include <linux/module.h>
#include <net/udp.h>
#include <net/ip_tunnels.h>
#include <net/rtnetlink.h>
#include <net/vxlan.h>
#include "datapath.h"
#include "vport.h"
#include "vport-netdev.h"
static struct vport_ops ovs_vxlan_netdev_vport_ops;
static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
{
struct vxlan_dev *vxlan = netdev_priv(vport->dev);
__be16 dst_port = vxlan->cfg.dst_port;
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
return -EMSGSIZE;
if (vxlan->cfg.flags & VXLAN_F_GBP) {
struct nlattr *exts;
exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION);
if (!exts)
return -EMSGSIZE;
if (vxlan->cfg.flags & VXLAN_F_GBP &&
nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
return -EMSGSIZE;
nla_nest_end(skb, exts);
}
return 0;
}
static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
[OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
};
static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
struct vxlan_config *conf)
{
struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
int err;
if (nla_len(attr) < sizeof(struct nlattr))
return -EINVAL;
err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr,
exts_policy, NULL);
if (err < 0)
return err;
if (exts[OVS_VXLAN_EXT_GBP])
conf->flags |= VXLAN_F_GBP;
return 0;
}
static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
{
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct net_device *dev;
struct vport *vport;
struct nlattr *a;
int err;
struct vxlan_config conf = {
.no_share = true,
.flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
/* Don't restrict the packets that can be sent by MTU */
.mtu = IP_MAX_MTU,
};
if (!options) {
err = -EINVAL;
goto error;
}
a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
if (a && nla_len(a) == sizeof(u16)) {
conf.dst_port = htons(nla_get_u16(a));
} else {
/* Require destination port from userspace. */
err = -EINVAL;
goto error;
}
vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
if (IS_ERR(vport))
return vport;
a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
if (a) {
err = vxlan_configure_exts(vport, a, &conf);
if (err) {
ovs_vport_free(vport);
goto error;
}
}
rtnl_lock();
dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
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);
goto error;
}
rtnl_unlock();
return vport;
error:
return ERR_PTR(err);
}
static struct vport *vxlan_create(const struct vport_parms *parms)
{
struct vport *vport;
vport = vxlan_tnl_create(parms);
if (IS_ERR(vport))
return vport;
return ovs_netdev_link(vport, parms->name);
}
static struct vport_ops ovs_vxlan_netdev_vport_ops = {
.type = OVS_VPORT_TYPE_VXLAN,
.create = vxlan_create,
.destroy = ovs_netdev_tunnel_destroy,
.get_options = vxlan_get_options,
.send = dev_queue_xmit,
};
static int __init ovs_vxlan_tnl_init(void)
{
return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
}
static void __exit ovs_vxlan_tnl_exit(void)
{
ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
}
module_init(ovs_vxlan_tnl_init);
module_exit(ovs_vxlan_tnl_exit);
MODULE_DESCRIPTION("OVS: VXLAN switching port");
MODULE_LICENSE("GPL");
MODULE_ALIAS("vport-type-4");