1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2014 Nicira, Inc.
4 * Copyright (c) 2013 Cisco Systems, Inc.
7 #include <linux/kernel.h>
8 #include <linux/skbuff.h>
9 #include <linux/openvswitch.h>
10 #include <linux/module.h>
12 #include <net/ip_tunnels.h>
13 #include <net/rtnetlink.h>
14 #include <net/vxlan.h>
18 #include "vport-netdev.h"
20 static struct vport_ops ovs_vxlan_netdev_vport_ops;
22 static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
24 struct vxlan_dev *vxlan = netdev_priv(vport->dev);
25 __be16 dst_port = vxlan->cfg.dst_port;
27 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
30 if (vxlan->cfg.flags & VXLAN_F_GBP) {
33 exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION);
37 if (vxlan->cfg.flags & VXLAN_F_GBP &&
38 nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
41 nla_nest_end(skb, exts);
47 static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
48 [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
51 static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
52 struct vxlan_config *conf)
54 struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
57 if (nla_len(attr) < sizeof(struct nlattr))
60 err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr,
65 if (exts[OVS_VXLAN_EXT_GBP])
66 conf->flags |= VXLAN_F_GBP;
71 static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
73 struct net *net = ovs_dp_get_net(parms->dp);
74 struct nlattr *options = parms->options;
75 struct net_device *dev;
79 struct vxlan_config conf = {
81 .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
82 /* Don't restrict the packets that can be sent by MTU */
91 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
92 if (a && nla_len(a) == sizeof(u16)) {
93 conf.dst_port = htons(nla_get_u16(a));
95 /* Require destination port from userspace. */
100 vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
104 a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
106 err = vxlan_configure_exts(vport, a, &conf);
108 ovs_vport_free(vport);
114 dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
117 ovs_vport_free(vport);
118 return ERR_CAST(dev);
121 err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
123 rtnl_delete_link(dev, 0, NULL);
125 ovs_vport_free(vport);
135 static struct vport *vxlan_create(const struct vport_parms *parms)
139 vport = vxlan_tnl_create(parms);
143 return ovs_netdev_link(vport, parms->name);
146 static struct vport_ops ovs_vxlan_netdev_vport_ops = {
147 .type = OVS_VPORT_TYPE_VXLAN,
148 .create = vxlan_create,
149 .destroy = ovs_netdev_tunnel_destroy,
150 .get_options = vxlan_get_options,
151 .send = dev_queue_xmit,
154 static int __init ovs_vxlan_tnl_init(void)
156 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
159 static void __exit ovs_vxlan_tnl_exit(void)
161 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
164 module_init(ovs_vxlan_tnl_init);
165 module_exit(ovs_vxlan_tnl_exit);
167 MODULE_DESCRIPTION("OVS: VXLAN switching port");
168 MODULE_LICENSE("GPL");
169 MODULE_ALIAS("vport-type-4");