2 * Copyright (c) 2015 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/net.h>
15 #include <linux/rculist.h>
16 #include <linux/udp.h>
17 #include <linux/if_vlan.h>
18 #include <linux/module.h>
23 #include <net/route.h>
30 #include "vport-netdev.h"
33 static struct vport_ops ovs_stt_vport_ops;
35 * struct stt_port - Keeps track of open UDP ports
36 * @dst_port: destination port.
42 static inline struct stt_port *stt_vport(const struct vport *vport)
44 return vport_priv(vport);
47 static int stt_get_options(const struct vport *vport,
50 struct stt_port *stt_port = stt_vport(vport);
52 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, stt_port->port_no))
57 static struct vport *stt_tnl_create(const struct vport_parms *parms)
59 struct net *net = ovs_dp_get_net(parms->dp);
60 struct nlattr *options = parms->options;
61 struct stt_port *stt_port;
62 struct net_device *dev;
73 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
74 if (a && nla_len(a) == sizeof(u16)) {
75 dst_port = nla_get_u16(a);
77 /* Require destination port from userspace. */
82 vport = ovs_vport_alloc(sizeof(struct stt_port),
83 &ovs_stt_vport_ops, parms);
87 stt_port = stt_vport(vport);
88 stt_port->port_no = dst_port;
91 dev = stt_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
94 ovs_vport_free(vport);
98 dev_change_flags(dev, dev->flags | IFF_UP);
105 static struct vport *stt_create(const struct vport_parms *parms)
109 vport = stt_tnl_create(parms);
113 return ovs_netdev_link(vport, parms->name);
116 static struct vport_ops ovs_stt_vport_ops = {
117 .type = OVS_VPORT_TYPE_STT,
118 .create = stt_create,
119 .destroy = ovs_netdev_tunnel_destroy,
120 .get_options = stt_get_options,
121 #ifndef USE_UPSTREAM_TUNNEL
122 .fill_metadata_dst = stt_fill_metadata_dst,
124 .send = ovs_stt_xmit,
127 static int __init ovs_stt_tnl_init(void)
129 return ovs_vport_ops_register(&ovs_stt_vport_ops);
132 static void __exit ovs_stt_tnl_exit(void)
134 ovs_vport_ops_unregister(&ovs_stt_vport_ops);
137 module_init(ovs_stt_tnl_init);
138 module_exit(ovs_stt_tnl_exit);
140 MODULE_DESCRIPTION("OVS: STT switching port");
141 MODULE_LICENSE("GPL");
142 MODULE_ALIAS("vport-type-106");