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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
f5796684 JG |
2 | /* |
3 | * Copyright (c) 2014 Nicira, Inc. | |
f5796684 JG |
4 | */ |
5 | ||
6 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
7 | ||
f5796684 JG |
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> | |
62b9c8d0 | 14 | #include <linux/module.h> |
f5796684 JG |
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" | |
6b001e68 | 25 | #include "vport-netdev.h" |
f5796684 | 26 | |
62b9c8d0 | 27 | static struct vport_ops ovs_geneve_vport_ops; |
f5796684 JG |
28 | /** |
29 | * struct geneve_port - Keeps track of open UDP ports | |
6b001e68 | 30 | * @dst_port: destination port. |
f5796684 JG |
31 | */ |
32 | struct geneve_port { | |
2f7066ad | 33 | u16 dst_port; |
f5796684 JG |
34 | }; |
35 | ||
f5796684 JG |
36 | static inline struct geneve_port *geneve_vport(const struct vport *vport) |
37 | { | |
38 | return vport_priv(vport); | |
39 | } | |
40 | ||
f5796684 JG |
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); | |
f5796684 | 45 | |
2f7066ad | 46 | if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->dst_port)) |
f5796684 JG |
47 | return -EMSGSIZE; |
48 | return 0; | |
49 | } | |
50 | ||
f5796684 JG |
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; | |
6b001e68 | 56 | struct net_device *dev; |
f5796684 JG |
57 | struct vport *vport; |
58 | struct nlattr *a; | |
f5796684 | 59 | u16 dst_port; |
6b001e68 | 60 | int err; |
f5796684 JG |
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); | |
2f7066ad | 82 | geneve_port->dst_port = dst_port; |
f5796684 | 83 | |
6b001e68 PS |
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(); | |
f5796684 | 88 | ovs_vport_free(vport); |
6b001e68 | 89 | return ERR_CAST(dev); |
f5796684 | 90 | } |
f5796684 | 91 | |
567c5e13 | 92 | err = dev_change_flags(dev, dev->flags | IFF_UP, NULL); |
4b5b9ba5 MP |
93 | if (err < 0) { |
94 | rtnl_delete_link(dev); | |
95 | rtnl_unlock(); | |
96 | ovs_vport_free(vport); | |
97 | goto error; | |
98 | } | |
99 | ||
6b001e68 | 100 | rtnl_unlock(); |
f5796684 JG |
101 | return vport; |
102 | error: | |
103 | return ERR_PTR(err); | |
104 | } | |
105 | ||
6b001e68 | 106 | static struct vport *geneve_create(const struct vport_parms *parms) |
f5796684 | 107 | { |
6b001e68 | 108 | struct vport *vport; |
f5796684 | 109 | |
6b001e68 PS |
110 | vport = geneve_tnl_create(parms); |
111 | if (IS_ERR(vport)) | |
112 | return vport; | |
8f0aad6f | 113 | |
6b001e68 | 114 | return ovs_netdev_link(vport, parms->name); |
8f0aad6f WZ |
115 | } |
116 | ||
62b9c8d0 | 117 | static struct vport_ops ovs_geneve_vport_ops = { |
f5796684 | 118 | .type = OVS_VPORT_TYPE_GENEVE, |
6b001e68 PS |
119 | .create = geneve_create, |
120 | .destroy = ovs_netdev_tunnel_destroy, | |
f5796684 | 121 | .get_options = geneve_get_options, |
aec15924 | 122 | .send = dev_queue_xmit, |
f5796684 | 123 | }; |
62b9c8d0 TG |
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 | ||
fc4fa6e1 | 138 | MODULE_DESCRIPTION("OVS: Geneve switching port"); |
62b9c8d0 TG |
139 | MODULE_LICENSE("GPL"); |
140 | MODULE_ALIAS("vport-type-5"); |