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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 | ||
15702dc9 JB |
73 | err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy, |
74 | NULL); | |
0c7930a3 TG |
75 | if (err < 0) |
76 | return err; | |
77 | ||
0c7930a3 | 78 | if (exts[OVS_VXLAN_EXT_GBP]) |
e23775f2 | 79 | conf->flags |= VXLAN_F_GBP; |
0c7930a3 TG |
80 | |
81 | return 0; | |
82 | } | |
83 | ||
c405d282 | 84 | static struct vport *vxlan_tnl_create(const struct vport_parms *parms) |
79f827fa | 85 | { |
c405d282 PS |
86 | struct net *net = ovs_dp_get_net(parms->dp); |
87 | struct nlattr *options = parms->options; | |
e23775f2 | 88 | struct net_device *dev; |
c405d282 | 89 | struct vport *vport; |
79f827fa | 90 | struct nlattr *a; |
1b7ee51f | 91 | int err; |
e23775f2 PS |
92 | struct vxlan_config conf = { |
93 | .no_share = true, | |
c1eb18c4 | 94 | .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX, |
06f1a61a DW |
95 | /* Don't restrict the packets that can be sent by MTU */ |
96 | .mtu = IP_MAX_MTU, | |
e23775f2 | 97 | }; |
79f827fa KM |
98 | |
99 | if (!options) { | |
100 | err = -EINVAL; | |
c405d282 | 101 | goto error; |
79f827fa | 102 | } |
e23775f2 | 103 | |
79f827fa KM |
104 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); |
105 | if (a && nla_len(a) == sizeof(u16)) { | |
e23775f2 | 106 | conf.dst_port = htons(nla_get_u16(a)); |
79f827fa KM |
107 | } else { |
108 | /* Require destination port from userspace. */ | |
109 | err = -EINVAL; | |
c405d282 | 110 | goto error; |
79f827fa KM |
111 | } |
112 | ||
e23775f2 | 113 | vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); |
c405d282 PS |
114 | if (IS_ERR(vport)) |
115 | return vport; | |
79f827fa | 116 | |
0c7930a3 TG |
117 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); |
118 | if (a) { | |
e23775f2 | 119 | err = vxlan_configure_exts(vport, a, &conf); |
0c7930a3 TG |
120 | if (err) { |
121 | ovs_vport_free(vport); | |
122 | goto error; | |
123 | } | |
124 | } | |
125 | ||
e23775f2 PS |
126 | rtnl_lock(); |
127 | dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); | |
128 | if (IS_ERR(dev)) { | |
129 | rtnl_unlock(); | |
1b7ee51f | 130 | ovs_vport_free(vport); |
e23775f2 | 131 | return ERR_CAST(dev); |
1b7ee51f | 132 | } |
79f827fa | 133 | |
c59b72b5 PS |
134 | err = dev_change_flags(dev, dev->flags | IFF_UP); |
135 | if (err < 0) { | |
136 | rtnl_delete_link(dev); | |
137 | rtnl_unlock(); | |
138 | ovs_vport_free(vport); | |
139 | goto error; | |
140 | } | |
141 | ||
e23775f2 | 142 | rtnl_unlock(); |
c405d282 | 143 | return vport; |
79f827fa | 144 | error: |
c405d282 | 145 | return ERR_PTR(err); |
79f827fa KM |
146 | } |
147 | ||
e23775f2 | 148 | static struct vport *vxlan_create(const struct vport_parms *parms) |
79f827fa | 149 | { |
e23775f2 | 150 | struct vport *vport; |
1b7ee51f | 151 | |
e23775f2 PS |
152 | vport = vxlan_tnl_create(parms); |
153 | if (IS_ERR(vport)) | |
154 | return vport; | |
1b7ee51f | 155 | |
e23775f2 | 156 | return ovs_netdev_link(vport, parms->name); |
79f827fa KM |
157 | } |
158 | ||
e23775f2 | 159 | static struct vport_ops ovs_vxlan_netdev_vport_ops = { |
8b7ea2d4 | 160 | .type = OVS_VPORT_TYPE_VXLAN, |
e23775f2 PS |
161 | .create = vxlan_create, |
162 | .destroy = ovs_netdev_tunnel_destroy, | |
8b7ea2d4 | 163 | .get_options = vxlan_get_options, |
564666e9 | 164 | #ifndef USE_UPSTREAM_TUNNEL |
aad7cb91 | 165 | .fill_metadata_dst = vxlan_fill_metadata_dst, |
564666e9 | 166 | #endif |
e23775f2 | 167 | .send = vxlan_xmit, |
79f827fa | 168 | }; |
5a38795f TG |
169 | |
170 | static int __init ovs_vxlan_tnl_init(void) | |
171 | { | |
e23775f2 | 172 | return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
173 | } |
174 | ||
175 | static void __exit ovs_vxlan_tnl_exit(void) | |
176 | { | |
e23775f2 | 177 | ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
178 | } |
179 | ||
180 | module_init(ovs_vxlan_tnl_init); | |
181 | module_exit(ovs_vxlan_tnl_exit); | |
182 | ||
183 | MODULE_DESCRIPTION("OVS: VXLAN switching port"); | |
184 | MODULE_LICENSE("GPL"); | |
185 | MODULE_ALIAS("vport-type-4"); |