tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2014 Nicira, Inc.
3 *
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.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/in.h>
13#include <linux/ip.h>
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>
19
20#include <net/geneve.h>
21#include <net/icmp.h>
22#include <net/ip.h>
23#include <net/route.h>
24#include <net/udp.h>
25#include <net/xfrm.h>
26
27#include "datapath.h"
28#include "vport.h"
29#include "vport-netdev.h"
30
31static struct vport_ops ovs_geneve_vport_ops;
32/**
33 * struct geneve_port - Keeps track of open UDP ports
34 * @dst_port: destination port.
35 */
36struct geneve_port {
37 u16 dst_port;
38};
39
40static inline struct geneve_port *geneve_vport(const struct vport *vport)
41{
42 return vport_priv(vport);
43}
44
45static int geneve_get_options(const struct vport *vport,
46 struct sk_buff *skb)
47{
48 struct geneve_port *geneve_port = geneve_vport(vport);
49
50 if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->dst_port))
51 return -EMSGSIZE;
52 return 0;
53}
54
55static struct vport *geneve_tnl_create(const struct vport_parms *parms)
56{
57 struct net *net = ovs_dp_get_net(parms->dp);
58 struct nlattr *options = parms->options;
59 struct geneve_port *geneve_port;
60 struct net_device *dev;
61 struct vport *vport;
62 struct nlattr *a;
63 u16 dst_port;
64 int err;
65
66 if (!options) {
67 err = -EINVAL;
68 goto error;
69 }
70
71 a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
72 if (a && nla_len(a) == sizeof(u16)) {
73 dst_port = nla_get_u16(a);
74 } else {
75 /* Require destination port from userspace. */
76 err = -EINVAL;
77 goto error;
78 }
79
80 vport = ovs_vport_alloc(sizeof(struct geneve_port),
81 &ovs_geneve_vport_ops, parms);
82 if (IS_ERR(vport))
83 return vport;
84
85 geneve_port = geneve_vport(vport);
86 geneve_port->dst_port = dst_port;
87
88 rtnl_lock();
89 dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port);
90 if (IS_ERR(dev)) {
91 rtnl_unlock();
92 ovs_vport_free(vport);
93 return ERR_CAST(dev);
94 }
95
96 err = dev_change_flags(dev, dev->flags | IFF_UP);
97 if (err < 0) {
98 rtnl_delete_link(dev);
99 rtnl_unlock();
100 ovs_vport_free(vport);
101 goto error;
102 }
103
104 rtnl_unlock();
105 return vport;
106error:
107 return ERR_PTR(err);
108}
109
110static struct vport *geneve_create(const struct vport_parms *parms)
111{
112 struct vport *vport;
113
114 vport = geneve_tnl_create(parms);
115 if (IS_ERR(vport))
116 return vport;
117
118 return ovs_netdev_link(vport, parms->name);
119}
120
121static struct vport_ops ovs_geneve_vport_ops = {
122 .type = OVS_VPORT_TYPE_GENEVE,
123 .create = geneve_create,
124 .destroy = ovs_netdev_tunnel_destroy,
125 .get_options = geneve_get_options,
126 .send = dev_queue_xmit,
127};
128
129static int __init ovs_geneve_tnl_init(void)
130{
131 return ovs_vport_ops_register(&ovs_geneve_vport_ops);
132}
133
134static void __exit ovs_geneve_tnl_exit(void)
135{
136 ovs_vport_ops_unregister(&ovs_geneve_vport_ops);
137}
138
139module_init(ovs_geneve_tnl_init);
140module_exit(ovs_geneve_tnl_exit);
141
142MODULE_DESCRIPTION("OVS: Geneve switching port");
143MODULE_LICENSE("GPL");
144MODULE_ALIAS("vport-type-5");