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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->cfg.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->cfg.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 NULL);
75 if (err < 0)
76 return err;
77
78 if (exts[OVS_VXLAN_EXT_GBP])
79 conf->flags |= VXLAN_F_GBP;
80
81 return 0;
82}
83
84static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
85{
86 struct net *net = ovs_dp_get_net(parms->dp);
87 struct nlattr *options = parms->options;
88 struct net_device *dev;
89 struct vport *vport;
90 struct nlattr *a;
91 int err;
92 struct vxlan_config conf = {
93 .no_share = true,
94 .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
95
96 .mtu = IP_MAX_MTU,
97 };
98
99 if (!options) {
100 err = -EINVAL;
101 goto error;
102 }
103
104 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
105 if (a && nla_len(a) == sizeof(u16)) {
106 conf.dst_port = htons(nla_get_u16(a));
107 } else {
108
109 err = -EINVAL;
110 goto error;
111 }
112
113 vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
114 if (IS_ERR(vport))
115 return vport;
116
117 a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
118 if (a) {
119 err = vxlan_configure_exts(vport, a, &conf);
120 if (err) {
121 ovs_vport_free(vport);
122 goto error;
123 }
124 }
125
126 rtnl_lock();
127 dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
128 if (IS_ERR(dev)) {
129 rtnl_unlock();
130 ovs_vport_free(vport);
131 return ERR_CAST(dev);
132 }
133
134 err = dev_change_flags(dev, dev->flags | IFF_UP);
135 if (err < 0) {
136 rtnl_delete_link(dev);
137 rtnl_unlock();
138 ovs_vport_free(vport);
139 goto error;
140 }
141
142 rtnl_unlock();
143 return vport;
144error:
145 return ERR_PTR(err);
146}
147
148static struct vport *vxlan_create(const struct vport_parms *parms)
149{
150 struct vport *vport;
151
152 vport = vxlan_tnl_create(parms);
153 if (IS_ERR(vport))
154 return vport;
155
156 return ovs_netdev_link(vport, parms->name);
157}
158
159static struct vport_ops ovs_vxlan_netdev_vport_ops = {
160 .type = OVS_VPORT_TYPE_VXLAN,
161 .create = vxlan_create,
162 .destroy = ovs_netdev_tunnel_destroy,
163 .get_options = vxlan_get_options,
164 .send = dev_queue_xmit,
165};
166
167static int __init ovs_vxlan_tnl_init(void)
168{
169 return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
170}
171
172static void __exit ovs_vxlan_tnl_exit(void)
173{
174 ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
175}
176
177module_init(ovs_vxlan_tnl_init);
178module_exit(ovs_vxlan_tnl_exit);
179
180MODULE_DESCRIPTION("OVS: VXLAN switching port");
181MODULE_LICENSE("GPL");
182MODULE_ALIAS("vport-type-4");
183
