Commit | Line | Data |
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f5796684 JG |
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 | ||
f5796684 JG |
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> | |
62b9c8d0 | 18 | #include <linux/module.h> |
f5796684 JG |
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" | |
6b001e68 | 29 | #include "vport-netdev.h" |
f5796684 | 30 | |
62b9c8d0 | 31 | static struct vport_ops ovs_geneve_vport_ops; |
f5796684 JG |
32 | /** |
33 | * struct geneve_port - Keeps track of open UDP ports | |
6b001e68 | 34 | * @dst_port: destination port. |
f5796684 JG |
35 | */ |
36 | struct geneve_port { | |
6b001e68 | 37 | u16 port_no; |
f5796684 JG |
38 | }; |
39 | ||
f5796684 JG |
40 | static inline struct geneve_port *geneve_vport(const struct vport *vport) |
41 | { | |
42 | return vport_priv(vport); | |
43 | } | |
44 | ||
f5796684 JG |
45 | static int geneve_get_options(const struct vport *vport, |
46 | struct sk_buff *skb) | |
47 | { | |
48 | struct geneve_port *geneve_port = geneve_vport(vport); | |
f5796684 | 49 | |
6b001e68 | 50 | if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, geneve_port->port_no)) |
f5796684 JG |
51 | return -EMSGSIZE; |
52 | return 0; | |
53 | } | |
54 | ||
6b001e68 | 55 | static int geneve_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, |
4c222798 | 56 | struct dp_upcall_info *upcall) |
f5796684 JG |
57 | { |
58 | struct geneve_port *geneve_port = geneve_vport(vport); | |
6b001e68 PS |
59 | struct net *net = ovs_dp_get_net(vport->dp); |
60 | __be16 dport = htons(geneve_port->port_no); | |
61 | __be16 sport = udp_flow_src_port(net, skb, 1, USHRT_MAX, true); | |
f5796684 | 62 | |
4c222798 | 63 | return ovs_tunnel_get_egress_info(upcall, ovs_dp_get_net(vport->dp), |
3eedb41f | 64 | skb, IPPROTO_UDP, sport, dport); |
f5796684 JG |
65 | } |
66 | ||
67 | static struct vport *geneve_tnl_create(const struct vport_parms *parms) | |
68 | { | |
69 | struct net *net = ovs_dp_get_net(parms->dp); | |
70 | struct nlattr *options = parms->options; | |
71 | struct geneve_port *geneve_port; | |
6b001e68 | 72 | struct net_device *dev; |
f5796684 JG |
73 | struct vport *vport; |
74 | struct nlattr *a; | |
f5796684 | 75 | u16 dst_port; |
6b001e68 | 76 | int err; |
f5796684 JG |
77 | |
78 | if (!options) { | |
79 | err = -EINVAL; | |
80 | goto error; | |
81 | } | |
82 | ||
83 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); | |
84 | if (a && nla_len(a) == sizeof(u16)) { | |
85 | dst_port = nla_get_u16(a); | |
86 | } else { | |
87 | /* Require destination port from userspace. */ | |
88 | err = -EINVAL; | |
89 | goto error; | |
90 | } | |
91 | ||
92 | vport = ovs_vport_alloc(sizeof(struct geneve_port), | |
93 | &ovs_geneve_vport_ops, parms); | |
94 | if (IS_ERR(vport)) | |
95 | return vport; | |
96 | ||
97 | geneve_port = geneve_vport(vport); | |
6b001e68 | 98 | geneve_port->port_no = dst_port; |
f5796684 | 99 | |
6b001e68 PS |
100 | rtnl_lock(); |
101 | dev = geneve_dev_create_fb(net, parms->name, NET_NAME_USER, dst_port); | |
102 | if (IS_ERR(dev)) { | |
103 | rtnl_unlock(); | |
f5796684 | 104 | ovs_vport_free(vport); |
6b001e68 | 105 | return ERR_CAST(dev); |
f5796684 | 106 | } |
f5796684 | 107 | |
6b001e68 PS |
108 | dev_change_flags(dev, dev->flags | IFF_UP); |
109 | rtnl_unlock(); | |
f5796684 JG |
110 | return vport; |
111 | error: | |
112 | return ERR_PTR(err); | |
113 | } | |
114 | ||
6b001e68 | 115 | static struct vport *geneve_create(const struct vport_parms *parms) |
f5796684 | 116 | { |
6b001e68 | 117 | struct vport *vport; |
f5796684 | 118 | |
6b001e68 PS |
119 | vport = geneve_tnl_create(parms); |
120 | if (IS_ERR(vport)) | |
121 | return vport; | |
8f0aad6f | 122 | |
6b001e68 | 123 | return ovs_netdev_link(vport, parms->name); |
8f0aad6f WZ |
124 | } |
125 | ||
62b9c8d0 | 126 | static struct vport_ops ovs_geneve_vport_ops = { |
f5796684 | 127 | .type = OVS_VPORT_TYPE_GENEVE, |
6b001e68 PS |
128 | .create = geneve_create, |
129 | .destroy = ovs_netdev_tunnel_destroy, | |
f5796684 | 130 | .get_options = geneve_get_options, |
6b001e68 | 131 | .send = ovs_netdev_send, |
62b9c8d0 | 132 | .owner = THIS_MODULE, |
8f0aad6f | 133 | .get_egress_tun_info = geneve_get_egress_tun_info, |
f5796684 | 134 | }; |
62b9c8d0 TG |
135 | |
136 | static int __init ovs_geneve_tnl_init(void) | |
137 | { | |
138 | return ovs_vport_ops_register(&ovs_geneve_vport_ops); | |
139 | } | |
140 | ||
141 | static void __exit ovs_geneve_tnl_exit(void) | |
142 | { | |
143 | ovs_vport_ops_unregister(&ovs_geneve_vport_ops); | |
144 | } | |
145 | ||
146 | module_init(ovs_geneve_tnl_init); | |
147 | module_exit(ovs_geneve_tnl_exit); | |
148 | ||
149 | MODULE_DESCRIPTION("OVS: Geneve swiching port"); | |
150 | MODULE_LICENSE("GPL"); | |
151 | MODULE_ALIAS("vport-type-5"); |