2 * Copyright (c) 2014 Nicira, Inc.
3 * Copyright (c) 2013 Cisco Systems, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 #include <linux/kernel.h>
21 #include <linux/skbuff.h>
22 #include <linux/openvswitch.h>
23 #include <linux/module.h>
25 #include <net/ip_tunnels.h>
26 #include <net/rtnetlink.h>
27 #include <net/vxlan.h>
31 #include "vport-netdev.h"
33 static struct vport_ops ovs_vxlan_netdev_vport_ops;
35 static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
37 struct vxlan_dev *vxlan = netdev_priv(vport->dev);
38 __be16 dst_port = vxlan->cfg.dst_port;
40 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
43 if (vxlan->flags & VXLAN_F_GBP) {
46 exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
50 if (vxlan->flags & VXLAN_F_GBP &&
51 nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
54 nla_nest_end(skb, exts);
60 static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
61 [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
64 static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
65 struct vxlan_config *conf)
67 struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
70 if (nla_len(attr) < sizeof(struct nlattr))
73 err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);
77 if (exts[OVS_VXLAN_EXT_GBP])
78 conf->flags |= VXLAN_F_GBP;
83 static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
85 struct net *net = ovs_dp_get_net(parms->dp);
86 struct nlattr *options = parms->options;
87 struct net_device *dev;
91 struct vxlan_config conf = {
93 .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
94 /* Don't restrict the packets that can be sent by MTU */
103 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
104 if (a && nla_len(a) == sizeof(u16)) {
105 conf.dst_port = htons(nla_get_u16(a));
107 /* Require destination port from userspace. */
112 vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
116 a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
118 err = vxlan_configure_exts(vport, a, &conf);
120 ovs_vport_free(vport);
126 dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
129 ovs_vport_free(vport);
130 return ERR_CAST(dev);
133 dev_change_flags(dev, dev->flags | IFF_UP);
140 static struct vport *vxlan_create(const struct vport_parms *parms)
144 vport = vxlan_tnl_create(parms);
148 return ovs_netdev_link(vport, parms->name);
151 static struct vport_ops ovs_vxlan_netdev_vport_ops = {
152 .type = OVS_VPORT_TYPE_VXLAN,
153 .create = vxlan_create,
154 .destroy = ovs_netdev_tunnel_destroy,
155 .get_options = vxlan_get_options,
156 .send = dev_queue_xmit,
159 static int __init ovs_vxlan_tnl_init(void)
161 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
164 static void __exit ovs_vxlan_tnl_exit(void)
166 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
169 module_init(ovs_vxlan_tnl_init);
170 module_exit(ovs_vxlan_tnl_exit);
172 MODULE_DESCRIPTION("OVS: VXLAN switching port");
173 MODULE_LICENSE("GPL");
174 MODULE_ALIAS("vport-type-4");