1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Copyright (c) 2015,2017 Nicira, Inc.
* Copyright (c) 2013 Cisco Systems, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/openvswitch.h>
#include <linux/module.h>
#include <net/udp.h>
#include <net/ip_tunnels.h>
#include <net/rtnetlink.h>
#include <net/vxlan.h>
#include "datapath.h"
#include "vport.h"
#include "vport-netdev.h"
static struct vport_ops ovs_vxlan_netdev_vport_ops;
static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
{
struct vxlan_dev *vxlan = netdev_priv(vport->dev);
__be16 dst_port = vxlan->cfg.dst_port;
if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
return -EMSGSIZE;
#ifdef HAVE_VXLAN_DEV_CFG
if (vxlan->cfg.flags & VXLAN_F_GBP) {
#else
if (vxlan->flags & VXLAN_F_GBP) {
#endif
struct nlattr *exts;
exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION);
if (!exts)
return -EMSGSIZE;
#ifdef HAVE_VXLAN_DEV_CFG
if (vxlan->cfg.flags & VXLAN_F_GBP &&
#else
if (vxlan->flags & VXLAN_F_GBP &&
#endif
nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
return -EMSGSIZE;
nla_nest_end(skb, exts);
#ifdef HAVE_VXLAN_DEV_CFG
} else if (vxlan->cfg.flags & VXLAN_F_GPE) {
#else
} else if (vxlan->flags & VXLAN_F_GPE) {
#endif
struct nlattr *exts;
exts = nla_nest_start(skb, OVS_TUNNEL_ATTR_EXTENSION);
if (!exts)
return -EMSGSIZE;
#ifdef HAVE_VXLAN_DEV_CFG
if (vxlan->cfg.flags & VXLAN_F_GPE &&
#else
if (vxlan->flags & VXLAN_F_GPE &&
#endif
nla_put_flag(skb, OVS_VXLAN_EXT_GPE))
return -EMSGSIZE;
nla_nest_end(skb, exts);
}
return 0;
}
static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
[OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
[OVS_VXLAN_EXT_GPE] = { .type = NLA_FLAG, },
};
static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
struct vxlan_config *conf)
{
struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
int err;
if (nla_len(attr) < sizeof(struct nlattr))
return -EINVAL;
err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr,
exts_policy, NULL);
if (err < 0)
return err;
if (exts[OVS_VXLAN_EXT_GBP])
conf->flags |= VXLAN_F_GBP;
else if (exts[OVS_VXLAN_EXT_GPE])
conf->flags |= VXLAN_F_GPE;
return 0;
}
static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
{
struct net *net = ovs_dp_get_net(parms->dp);
struct nlattr *options = parms->options;
struct net_device *dev;
struct vport *vport;
struct nlattr *a;
int err;
struct vxlan_config conf = {
.no_share = true,
.flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
/* Don't restrict the packets that can be sent by MTU */
.mtu = IP_MAX_MTU,
};
if (!options) {
err = -EINVAL;
goto error;
}
a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
if (a && nla_len(a) == sizeof(u16)) {
conf.dst_port = htons(nla_get_u16(a));
} else {
/* Require destination port from userspace. */
err = -EINVAL;
goto error;
}
vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
if (IS_ERR(vport))
return vport;
a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
if (a) {
err = vxlan_configure_exts(vport, a, &conf);
if (err) {
ovs_vport_free(vport);
goto error;
}
}
rtnl_lock();
dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
if (IS_ERR(dev)) {
rtnl_unlock();
ovs_vport_free(vport);
return ERR_CAST(dev);
}
err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
if (err < 0) {
rtnl_delete_link(dev);
rtnl_unlock();
ovs_vport_free(vport);
goto error;
}
rtnl_unlock();
return vport;
error:
return ERR_PTR(err);
}
static struct vport *vxlan_create(const struct vport_parms *parms)
{
struct vport *vport;
vport = vxlan_tnl_create(parms);
if (IS_ERR(vport))
return vport;
return ovs_netdev_link(vport, parms->name);
}
static struct vport_ops ovs_vxlan_netdev_vport_ops = {
.type = OVS_VPORT_TYPE_VXLAN,
.create = vxlan_create,
.destroy = ovs_netdev_tunnel_destroy,
.get_options = vxlan_get_options,
#ifndef USE_UPSTREAM_TUNNEL
.fill_metadata_dst = vxlan_fill_metadata_dst,
#endif
.send = vxlan_xmit,
};
static int __init ovs_vxlan_tnl_init(void)
{
return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
}
static void __exit ovs_vxlan_tnl_exit(void)
{
ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
}
module_init(ovs_vxlan_tnl_init);
module_exit(ovs_vxlan_tnl_exit);
MODULE_DESCRIPTION("OVS: VXLAN switching port");
MODULE_LICENSE("GPL");
MODULE_ALIAS("vport-type-4");
|
