blob: 547173336cd308567c6815170a7ff542710b5705 [file] [log] [blame]
Thomas Grafdcc38c02015-07-29 13:52:06 +02001/*
2 * Copyright (c) 2014 Nicira, Inc.
3 * Copyright (c) 2013 Cisco Systems, Inc.
4 *
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.
8 *
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.
13 *
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
17 * 02110-1301, USA
18 */
19
20#include <linux/kernel.h>
21#include <linux/skbuff.h>
22#include <linux/openvswitch.h>
23#include <linux/module.h>
24#include <net/udp.h>
25#include <net/ip_tunnels.h>
26#include <net/rtnetlink.h>
27#include <net/vxlan.h>
28
29#include "datapath.h"
30#include "vport.h"
31#include "vport-netdev.h"
32
33static struct vport_ops ovs_vxlan_netdev_vport_ops;
34
35static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
36{
37 struct vxlan_dev *vxlan = netdev_priv(vport->dev);
38 __be16 dst_port = vxlan->cfg.dst_port;
39
40 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
41 return -EMSGSIZE;
42
43 if (vxlan->flags & VXLAN_F_GBP) {
44 struct nlattr *exts;
45
46 exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
47 if (!exts)
48 return -EMSGSIZE;
49
50 if (vxlan->flags & VXLAN_F_GBP &&
51 nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
52 return -EMSGSIZE;
53
54 nla_nest_end(skb, exts);
55 }
56
57 return 0;
58}
59
60static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
61 [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
62};
63
64static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
65 struct vxlan_config *conf)
66{
67 struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
68 int err;
69
70 if (nla_len(attr) < sizeof(struct nlattr))
71 return -EINVAL;
72
73 err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy);
74 if (err < 0)
75 return err;
76
77 if (exts[OVS_VXLAN_EXT_GBP])
78 conf->flags |= VXLAN_F_GBP;
79
80 return 0;
81}
82
83static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
84{
85 struct net *net = ovs_dp_get_net(parms->dp);
86 struct nlattr *options = parms->options;
87 struct net_device *dev;
88 struct vport *vport;
89 struct nlattr *a;
90 int err;
91 struct vxlan_config conf = {
92 .no_share = true,
93 .flags = VXLAN_F_FLOW_BASED | VXLAN_F_COLLECT_METADATA,
94 };
95
96 if (!options) {
97 err = -EINVAL;
98 goto error;
99 }
100
101 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
102 if (a && nla_len(a) == sizeof(u16)) {
103 conf.dst_port = htons(nla_get_u16(a));
104 } else {
105 /* Require destination port from userspace. */
106 err = -EINVAL;
107 goto error;
108 }
109
110 vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
111 if (IS_ERR(vport))
112 return vport;
113
114 a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
115 if (a) {
116 err = vxlan_configure_exts(vport, a, &conf);
117 if (err) {
118 ovs_vport_free(vport);
119 goto error;
120 }
121 }
122
123 rtnl_lock();
124 dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
125 if (IS_ERR(dev)) {
126 rtnl_unlock();
127 ovs_vport_free(vport);
128 return ERR_CAST(dev);
129 }
130
131 dev_change_flags(dev, dev->flags | IFF_UP);
132 rtnl_unlock();
133 return vport;
134error:
135 return ERR_PTR(err);
136}
137
138static struct vport *vxlan_create(const struct vport_parms *parms)
139{
140 struct vport *vport;
141
142 vport = vxlan_tnl_create(parms);
143 if (IS_ERR(vport))
144 return vport;
145
146 return ovs_netdev_link(vport, parms->name);
147}
148
149static void vxlan_destroy(struct vport *vport)
150{
151 rtnl_lock();
152 if (vport->dev->priv_flags & IFF_OVS_DATAPATH)
153 ovs_netdev_detach_dev(vport);
154
155 /* Early release so we can unregister the device */
156 dev_put(vport->dev);
157 rtnl_delete_link(vport->dev);
158 vport->dev = NULL;
159 rtnl_unlock();
160
161 call_rcu(&vport->rcu, ovs_vport_free_rcu);
162}
163
164static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
165 struct ip_tunnel_info *egress_tun_info)
166{
167 struct vxlan_dev *vxlan = netdev_priv(vport->dev);
168 struct net *net = ovs_dp_get_net(vport->dp);
169 __be16 dst_port = vxlan_dev_dst_port(vxlan);
170 __be16 src_port;
171 int port_min;
172 int port_max;
173
174 inet_get_local_port_range(net, &port_min, &port_max);
175 src_port = udp_flow_src_port(net, skb, 0, 0, true);
176
177 return ovs_tunnel_get_egress_info(egress_tun_info, net,
178 OVS_CB(skb)->egress_tun_info,
179 IPPROTO_UDP, skb->mark,
180 src_port, dst_port);
181}
182
183static struct vport_ops ovs_vxlan_netdev_vport_ops = {
184 .type = OVS_VPORT_TYPE_VXLAN,
185 .create = vxlan_create,
186 .destroy = vxlan_destroy,
187 .get_options = vxlan_get_options,
188 .send = ovs_netdev_send,
189 .get_egress_tun_info = vxlan_get_egress_tun_info,
190};
191
192static int __init ovs_vxlan_tnl_init(void)
193{
194 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
195}
196
197static void __exit ovs_vxlan_tnl_exit(void)
198{
199 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
200}
201
202module_init(ovs_vxlan_tnl_init);
203module_exit(ovs_vxlan_tnl_exit);
204
205MODULE_DESCRIPTION("OVS: VXLAN switching port");
206MODULE_LICENSE("GPL");
207MODULE_ALIAS("vport-type-4");