1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2014 Nicira, Inc.
4 */
5
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8 #include <linux/in.h>
9 #include <linux/ip.h>
10 #include <linux/net.h>
11 #include <linux/rculist.h>
12 #include <linux/udp.h>
13 #include <linux/if_vlan.h>
14 #include <linux/module.h>
15
16 #include <net/geneve.h>
17 #include <net/icmp.h>
18 #include <net/ip.h>
19 #include <net/route.h>
20 #include <net/udp.h>
21 #include <net/xfrm.h>
22
23 #include "datapath.h"
24 #include "vport.h"
25 #include "vport-netdev.h"
26
27 static struct vport_ops ovs_geneve_vport_ops;
28 /**
29 * struct geneve_port - Keeps track of open UDP ports
30 * @dst_port: destination port.
31 */
32 struct geneve_port {
33 u16 dst_port;
34 };
35
36 static inline struct geneve_port *geneve_vport(const struct vport *vport)
37 {
38 return vport_priv(vport);
39 }
40
41 static int geneve_get_options(const struct vport *vport,
42 struct sk_buff *skb)
43 {
44 struct geneve_port *geneve_port = geneve_vport(vport);
45
46 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->dst_port))
47 return -EMSGSIZE;
48 return 0;
49 }
50
51 static struct vport *geneve_tnl_create(const struct vport_parms *parms)
52 {
53 struct net *net = ovs_dp_get_net(parms->dp);
54 struct nlattr *options = parms->options;
55 struct geneve_port *geneve_port;
56 struct net_device *dev;
57 struct vport *vport;
58 struct nlattr *a;
59 u16 dst_port;
60 int err;
61
62 if (!options) {
63 err = -EINVAL;
64 goto error;
65 }
66
67 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
68 if (a && nla_len(a) == sizeof(u16)) {
69 dst_port = nla_get_u16(a);
70 } else {
71 /* Require destination port from userspace. */
72 err = -EINVAL;
73 goto error;
74 }
75
76 vport = ovs_vport_alloc(sizeof(struct geneve_port),
77 &ovs_geneve_vport_ops, parms);
78 if (IS_ERR(vport))
79 return vport;
80
81 geneve_port = geneve_vport(vport);
82 geneve_port->dst_port = dst_port;
83
84 rtnl_lock();
85 dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
86 if (IS_ERR(dev)) {
87 rtnl_unlock();
88 ovs_vport_free(vport);
89 return ERR_CAST(dev);
90 }
91
92 err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
93 if (err < 0) {
94 rtnl_delete_link(dev, 0, NULL);
95 rtnl_unlock();
96 ovs_vport_free(vport);
97 goto error;
98 }
99
100 rtnl_unlock();
101 return vport;
102 error:
103 return ERR_PTR(err);
104 }
105
106 static struct vport *geneve_create(const struct vport_parms *parms)
107 {
108 struct vport *vport;
109
110 vport = geneve_tnl_create(parms);
111 if (IS_ERR(vport))
112 return vport;
113
114 return ovs_netdev_link(vport, parms->name);
115 }
116
117 static struct vport_ops ovs_geneve_vport_ops = {
118 .type = OVS_VPORT_TYPE_GENEVE,
119 .create = geneve_create,
120 .destroy = ovs_netdev_tunnel_destroy,
121 .get_options = geneve_get_options,
122 .send = dev_queue_xmit,
123 };
124
125 static int __init ovs_geneve_tnl_init(void)
126 {
127 return ovs_vport_ops_register(&ovs_geneve_vport_ops);
128 }
129
130 static void __exit ovs_geneve_tnl_exit(void)
131 {
132 ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
133 }
134
135 module_init(ovs_geneve_tnl_init);
136 module_exit(ovs_geneve_tnl_exit);
137
138 MODULE_DESCRIPTION("OVS: Geneve switching port");
139 MODULE_LICENSE("GPL");
140 MODULE_ALIAS("vport-type-5");
141
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