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79f827fa | 1 | /* |
893fd5d2 | 2 | * Copyright (c) 2015,2017 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 | |
14365643 GR |
43 | #ifdef HAVE_VXLAN_DEV_CFG |
44 | if (vxlan->cfg.flags & VXLAN_F_GBP) { | |
45 | #else | |
e23775f2 | 46 | if (vxlan->flags & VXLAN_F_GBP) { |
14365643 | 47 | #endif |
0c7930a3 TG |
48 | struct nlattr *exts; |
49 | ||
09c33996 | 50 | exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION); |
0c7930a3 TG |
51 | if (!exts) |
52 | return -EMSGSIZE; | |
53 | ||
14365643 GR |
54 | #ifdef HAVE_VXLAN_DEV_CFG |
55 | if (vxlan->cfg.flags & VXLAN_F_GBP && | |
56 | #else | |
e23775f2 | 57 | if (vxlan->flags & VXLAN_F_GBP && |
14365643 | 58 | #endif |
0c7930a3 TG |
59 | nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) |
60 | return -EMSGSIZE; | |
61 | ||
fefbbb74 | 62 | nla_nest_end(skb, exts); |
893fd5d2 GR |
63 | #ifdef HAVE_VXLAN_DEV_CFG |
64 | } else if (vxlan->cfg.flags & VXLAN_F_GPE) { | |
65 | #else | |
fefbbb74 | 66 | } else if (vxlan->flags & VXLAN_F_GPE) { |
893fd5d2 | 67 | #endif |
fefbbb74 YY |
68 | struct nlattr *exts; |
69 | ||
70 | exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION); | |
71 | if (!exts) | |
72 | return -EMSGSIZE; | |
73 | ||
893fd5d2 GR |
74 | #ifdef HAVE_VXLAN_DEV_CFG |
75 | if (vxlan->cfg.flags & VXLAN_F_GPE && | |
76 | #else | |
fefbbb74 | 77 | if (vxlan->flags & VXLAN_F_GPE && |
893fd5d2 | 78 | #endif |
fefbbb74 YY |
79 | nla_put_flag(skb, OVS_VXLAN_EXT_GPE)) |
80 | return -EMSGSIZE; | |
81 | ||
0c7930a3 TG |
82 | nla_nest_end(skb, exts); |
83 | } | |
84 | ||
c405d282 | 85 | return 0; |
85c9de19 PS |
86 | } |
87 | ||
e23775f2 | 88 | static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { |
0c7930a3 | 89 | [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, |
fefbbb74 | 90 | [OVS_VXLAN_EXT_GPE] = { .type = NLA_FLAG, }, |
0c7930a3 TG |
91 | }; |
92 | ||
e23775f2 PS |
93 | static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, |
94 | struct vxlan_config *conf) | |
0c7930a3 | 95 | { |
e23775f2 | 96 | struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; |
0c7930a3 TG |
97 | int err; |
98 | ||
99 | if (nla_len(attr) < sizeof(struct nlattr)) | |
100 | return -EINVAL; | |
101 | ||
6db0f72d JB |
102 | err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr, |
103 | exts_policy, NULL); | |
0c7930a3 TG |
104 | if (err < 0) |
105 | return err; | |
106 | ||
0c7930a3 | 107 | if (exts[OVS_VXLAN_EXT_GBP]) |
e23775f2 | 108 | conf->flags |= VXLAN_F_GBP; |
fefbbb74 YY |
109 | else if (exts[OVS_VXLAN_EXT_GPE]) |
110 | conf->flags |= VXLAN_F_GPE; | |
0c7930a3 TG |
111 | |
112 | return 0; | |
113 | } | |
114 | ||
c405d282 | 115 | static struct vport *vxlan_tnl_create(const struct vport_parms *parms) |
79f827fa | 116 | { |
c405d282 PS |
117 | struct net *net = ovs_dp_get_net(parms->dp); |
118 | struct nlattr *options = parms->options; | |
e23775f2 | 119 | struct net_device *dev; |
c405d282 | 120 | struct vport *vport; |
79f827fa | 121 | struct nlattr *a; |
1b7ee51f | 122 | int err; |
e23775f2 PS |
123 | struct vxlan_config conf = { |
124 | .no_share = true, | |
c1eb18c4 | 125 | .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX, |
06f1a61a DW |
126 | /* Don't restrict the packets that can be sent by MTU */ |
127 | .mtu = IP_MAX_MTU, | |
e23775f2 | 128 | }; |
79f827fa KM |
129 | |
130 | if (!options) { | |
131 | err = -EINVAL; | |
c405d282 | 132 | goto error; |
79f827fa | 133 | } |
e23775f2 | 134 | |
79f827fa KM |
135 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); |
136 | if (a && nla_len(a) == sizeof(u16)) { | |
e23775f2 | 137 | conf.dst_port = htons(nla_get_u16(a)); |
79f827fa KM |
138 | } else { |
139 | /* Require destination port from userspace. */ | |
140 | err = -EINVAL; | |
c405d282 | 141 | goto error; |
79f827fa KM |
142 | } |
143 | ||
e23775f2 | 144 | vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); |
c405d282 PS |
145 | if (IS_ERR(vport)) |
146 | return vport; | |
79f827fa | 147 | |
0c7930a3 TG |
148 | a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); |
149 | if (a) { | |
e23775f2 | 150 | err = vxlan_configure_exts(vport, a, &conf); |
0c7930a3 TG |
151 | if (err) { |
152 | ovs_vport_free(vport); | |
153 | goto error; | |
154 | } | |
155 | } | |
156 | ||
e23775f2 PS |
157 | rtnl_lock(); |
158 | dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); | |
159 | if (IS_ERR(dev)) { | |
160 | rtnl_unlock(); | |
1b7ee51f | 161 | ovs_vport_free(vport); |
e23775f2 | 162 | return ERR_CAST(dev); |
1b7ee51f | 163 | } |
79f827fa | 164 | |
140c8971 | 165 | err = dev_change_flags(dev, dev->flags | IFF_UP, NULL); |
c59b72b5 PS |
166 | if (err < 0) { |
167 | rtnl_delete_link(dev); | |
168 | rtnl_unlock(); | |
169 | ovs_vport_free(vport); | |
170 | goto error; | |
171 | } | |
172 | ||
e23775f2 | 173 | rtnl_unlock(); |
c405d282 | 174 | return vport; |
79f827fa | 175 | error: |
c405d282 | 176 | return ERR_PTR(err); |
79f827fa KM |
177 | } |
178 | ||
e23775f2 | 179 | static struct vport *vxlan_create(const struct vport_parms *parms) |
79f827fa | 180 | { |
e23775f2 | 181 | struct vport *vport; |
1b7ee51f | 182 | |
e23775f2 PS |
183 | vport = vxlan_tnl_create(parms); |
184 | if (IS_ERR(vport)) | |
185 | return vport; | |
1b7ee51f | 186 | |
e23775f2 | 187 | return ovs_netdev_link(vport, parms->name); |
79f827fa KM |
188 | } |
189 | ||
e23775f2 | 190 | static struct vport_ops ovs_vxlan_netdev_vport_ops = { |
8b7ea2d4 | 191 | .type = OVS_VPORT_TYPE_VXLAN, |
e23775f2 PS |
192 | .create = vxlan_create, |
193 | .destroy = ovs_netdev_tunnel_destroy, | |
8b7ea2d4 | 194 | .get_options = vxlan_get_options, |
564666e9 | 195 | #ifndef USE_UPSTREAM_TUNNEL |
aad7cb91 | 196 | .fill_metadata_dst = vxlan_fill_metadata_dst, |
564666e9 | 197 | #endif |
e23775f2 | 198 | .send = vxlan_xmit, |
79f827fa | 199 | }; |
5a38795f TG |
200 | |
201 | static int __init ovs_vxlan_tnl_init(void) | |
202 | { | |
e23775f2 | 203 | return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
204 | } |
205 | ||
206 | static void __exit ovs_vxlan_tnl_exit(void) | |
207 | { | |
e23775f2 | 208 | ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); |
5a38795f TG |
209 | } |
210 | ||
211 | module_init(ovs_vxlan_tnl_init); | |
212 | module_exit(ovs_vxlan_tnl_exit); | |
213 | ||
214 | MODULE_DESCRIPTION("OVS: VXLAN switching port"); | |
215 | MODULE_LICENSE("GPL"); | |
216 | MODULE_ALIAS("vport-type-4"); |