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Commit | Line | Data |
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79f827fa | 1 | /* |
e23775f2 | 2 | * Copyright (c) 2015 Nicira, Inc. |
a109c9fb | 3 | * Copyright (c) 2013 Cisco Systems, Inc. |
79f827fa KM |
4 | * |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
18 | */ | |
19 | ||
e23775f2 PS |
20 | #include <linux/kernel.h> |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/openvswitch.h> | |
5a38795f | 23 | #include <linux/module.h> |
79f827fa | 24 | #include <net/udp.h> |
1b7ee51f | 25 | #include <net/ip_tunnels.h> |
1b7ee51f | 26 | #include <net/rtnetlink.h> |
1b7ee51f | 27 | #include <net/vxlan.h> |
79f827fa KM |
28 | |
29 | #include "datapath.h" | |
79f827fa | 30 | #include "vport.h" |
e23775f2 | 31 | #include "vport-netdev.h" |
79f827fa | 32 | |
e23775f2 | 33 | static struct vport_ops ovs_vxlan_netdev_vport_ops; |
79f827fa | 34 | |
c405d282 | 35 | static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) |
85c9de19 | 36 | { |
e23775f2 PS |
37 | struct vxlan_dev *vxlan = netdev_priv(vport->dev); |
38 | __be16 dst_port = vxlan->cfg.dst_port; | |
85c9de19 | 39 | |
1b7ee51f | 40 | if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) |
c405d282 | 41 | return -EMSGSIZE; |
0c7930a3 | 42 | |
e23775f2 | 43 | if (vxlan->flags & VXLAN_F_GBP) { |
0c7930a3 TG |
44 | struct nlattr *exts; |
45 | ||
46 | exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION); | |
47 | if (!exts) | |
48 | return -EMSGSIZE; | |
49 | ||
e23775f2 | 50 | if (vxlan->flags & VXLAN_F_GBP && |
0c7930a3 TG |
51 | nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) |
52 | return -EMSGSIZE; | |
53 | ||
54 | nla_nest_end(skb, exts); | |
55 | } | |
56 | ||
c405d282 | 57 | return 0; |
85c9de19 PS |
58 | } |
59 | ||
e23775f2 | 60 | static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { |
0c7930a3 TG |
61 | [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, |
62 | }; | |
63 | ||
e23775f2 PS |
64 | static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, |
65 | struct vxlan_config *conf) | |
0c7930a3 | 66 | { |
e23775f2 | 67 | struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; |
0c7930a3 TG |
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 | if (err < 0) | |
75 | return err; | |
76 | ||
0c7930a3 | 77 | if (exts[OVS_VXLAN_EXT_GBP]) |
e23775f2 | 78 | conf->flags |= VXLAN_F_GBP; |
0c7930a3 TG |
79 | |
80 | return 0; | |
81 | } | |
82 | ||
c405d282 | 83 | static struct vport *vxlan_tnl_create(const struct vport_parms *parms) |
79f827fa | 84 | { |
c405d282 PS |
85 | struct net *net = ovs_dp_get_net(parms->dp); |
86 | struct nlattr *options = parms->options; | |
e23775f2 | 87 | struct net_device *dev; |
c405d282 | 88 | struct vport *vport; |
79f827fa | 89 | struct nlattr *a; |
1b7ee51f | 90 | int err; |
e23775f2 PS |
91 | struct vxlan_config conf = { |
92 | .no_share = true, | |
93 | .flags = VXLAN_F_COLLECT_METADATA, | |
94 | }; | |
79f827fa KM |
95 | |
96 | if (!options) { | |
97 | err = -EINVAL; | |
c405d282 | 98 | goto error; |
79f827fa | 99 | } |
e23775f2 | 100 | |
79f827fa KM |
101 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); |
102 | if (a && nla_len(a) == sizeof(u16)) { | |
e23775f2 | 103 | conf.dst_port = htons(nla_get_u16(a)); |
79f827fa KM |
104 | } else { |
105 | /* Require destination port from userspace. */ | |
106 | err = -EINVAL; | |
c405d282 | 107 | goto error; |
79f827fa KM |
108 | } |
109 | ||
e23775f2 | 110 | vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); |
c405d282 PS |
111 | if (IS_ERR(vport)) |
112 | return vport; | |
79f827fa | 113 | |
0c7930a3 TG |
114 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); |
115 | if (a) { | |
e23775f2 | 116 | err = vxlan_configure_exts(vport, a, &conf); |
0c7930a3 TG |
117 | if (err) { |
118 | ovs_vport_free(vport); | |
119 | goto error; | |
120 | } | |
121 | } | |
122 | ||
e23775f2 PS |
123 | rtnl_lock(); |
124 | dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); | |
125 | if (IS_ERR(dev)) { | |
126 | rtnl_unlock(); | |
1b7ee51f | 127 | ovs_vport_free(vport); |
e23775f2 | 128 | return ERR_CAST(dev); |
1b7ee51f | 129 | } |
79f827fa | 130 | |
e23775f2 PS |
131 | dev_change_flags(dev, dev->flags | IFF_UP); |
132 | rtnl_unlock(); | |
c405d282 | 133 | return vport; |
79f827fa | 134 | error: |
c405d282 | 135 | return ERR_PTR(err); |
79f827fa KM |
136 | } |
137 | ||
e23775f2 | 138 | static struct vport *vxlan_create(const struct vport_parms *parms) |
79f827fa | 139 | { |
e23775f2 | 140 | struct vport *vport; |
1b7ee51f | 141 | |
e23775f2 PS |
142 | vport = vxlan_tnl_create(parms); |
143 | if (IS_ERR(vport)) | |
144 | return vport; | |
1b7ee51f | 145 | |
e23775f2 | 146 | return ovs_netdev_link(vport, parms->name); |
79f827fa KM |
147 | } |
148 | ||
8b7ea2d4 | 149 | static int vxlan_get_egress_tun_info(struct vport *vport, struct sk_buff *skb, |
e23775f2 | 150 | struct dp_upcall_info *upcall) |
8b7ea2d4 | 151 | { |
e23775f2 | 152 | struct vxlan_dev *vxlan = netdev_priv(vport->dev); |
8b7ea2d4 | 153 | struct net *net = ovs_dp_get_net(vport->dp); |
e23775f2 | 154 | __be16 dst_port = vxlan_dev_dst_port(vxlan); |
8b7ea2d4 | 155 | __be16 src_port; |
e23775f2 PS |
156 | int port_min; |
157 | int port_max; | |
8b7ea2d4 | 158 | |
e23775f2 | 159 | inet_get_local_port_range(net, &port_min, &port_max); |
f6a0c895 | 160 | src_port = udp_flow_src_port(net, skb, 0, 0, true); |
8b7ea2d4 | 161 | |
e23775f2 PS |
162 | return ovs_tunnel_get_egress_info(upcall, net, |
163 | skb, IPPROTO_UDP, | |
8b7ea2d4 WZ |
164 | src_port, dst_port); |
165 | } | |
166 | ||
e23775f2 | 167 | static struct vport_ops ovs_vxlan_netdev_vport_ops = { |
8b7ea2d4 | 168 | .type = OVS_VPORT_TYPE_VXLAN, |
e23775f2 PS |
169 | .create = vxlan_create, |
170 | .destroy = ovs_netdev_tunnel_destroy, | |
8b7ea2d4 | 171 | .get_options = vxlan_get_options, |
e23775f2 | 172 | .send = vxlan_xmit, |
8b7ea2d4 | 173 | .get_egress_tun_info = vxlan_get_egress_tun_info, |
79f827fa | 174 | }; |
5a38795f TG |
175 | |
176 | static int __init ovs_vxlan_tnl_init(void) | |
177 | { | |
e23775f2 | 178 | return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
179 | } |
180 | ||
181 | static void __exit ovs_vxlan_tnl_exit(void) | |
182 | { | |
e23775f2 | 183 | ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
184 | } |
185 | ||
186 | module_init(ovs_vxlan_tnl_init); | |
187 | module_exit(ovs_vxlan_tnl_exit); | |
188 | ||
189 | MODULE_DESCRIPTION("OVS: VXLAN switching port"); | |
190 | MODULE_LICENSE("GPL"); | |
191 | MODULE_ALIAS("vport-type-4"); |