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
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* VLAN netlink control interface
*
* Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <net/net_namespace.h>
#include <net/netlink.h>
#include <net/rtnetlink.h>
#include "vlan.h"
static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
[IFLA_VLAN_ID] = { .type = NLA_U16 },
[IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
[IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
[IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
};
static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
[IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
};
static inline int vlan_validate_qos_map(struct nlattr *attr)
{
if (!attr)
return 0;
return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
}
static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
{
struct ifla_vlan_flags *flags;
u16 id;
int err;
if (tb[IFLA_ADDRESS]) {
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
return -EINVAL;
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
return -EADDRNOTAVAIL;
}
if (!data)
return -EINVAL;
if (data[IFLA_VLAN_ID]) {
id = nla_get_u16(data[IFLA_VLAN_ID]);
if (id >= VLAN_VID_MASK)
return -ERANGE;
}
if (data[IFLA_VLAN_FLAGS]) {
flags = nla_data(data[IFLA_VLAN_FLAGS]);
if ((flags->flags & flags->mask) &
~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
VLAN_FLAG_LOOSE_BINDING))
return -EINVAL;
}
err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
if (err < 0)
return err;
err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
if (err < 0)
return err;
return 0;
}
static int vlan_changelink(struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct ifla_vlan_flags *flags;
struct ifla_vlan_qos_mapping *m;
struct nlattr *attr;
int rem;
if (data[IFLA_VLAN_FLAGS]) {
flags = nla_data(data[IFLA_VLAN_FLAGS]);
vlan_dev_change_flags(dev, flags->flags, flags->mask);
}
if (data[IFLA_VLAN_INGRESS_QOS]) {
nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
m = nla_data(attr);
vlan_dev_set_ingress_priority(dev, m->to, m->from);
}
}
if (data[IFLA_VLAN_EGRESS_QOS]) {
nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
m = nla_data(attr);
vlan_dev_set_egress_priority(dev, m->from, m->to);
}
}
return 0;
}
static int vlan_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct net_device *real_dev;
int err;
if (!data[IFLA_VLAN_ID])
return -EINVAL;
if (!tb[IFLA_LINK])
return -EINVAL;
real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
if (!real_dev)
return -ENODEV;
vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
vlan->real_dev = real_dev;
vlan->flags = VLAN_FLAG_REORDER_HDR;
err = vlan_check_real_dev(real_dev, vlan->vlan_id);
if (err < 0)
return err;
if (!tb[IFLA_MTU])
dev->mtu = real_dev->mtu;
else if (dev->mtu > real_dev->mtu)
return -EINVAL;
err = vlan_changelink(dev, tb, data);
if (err < 0)
return err;
return register_vlan_dev(dev);
}
static inline size_t vlan_qos_map_size(unsigned int n)
{
if (n == 0)
return 0;
/* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
return nla_total_size(sizeof(struct nlattr)) +
nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
}
static size_t vlan_get_size(const struct net_device *dev)
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
return nla_total_size(2) + /* IFLA_VLAN_ID */
sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
vlan_qos_map_size(vlan->nr_ingress_mappings) +
vlan_qos_map_size(vlan->nr_egress_mappings);
}
static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
struct vlan_dev_info *vlan = vlan_dev_info(dev);
struct vlan_priority_tci_mapping *pm;
struct ifla_vlan_flags f;
struct ifla_vlan_qos_mapping m;
struct nlattr *nest;
unsigned int i;
NLA_PUT_U16(skb, IFLA_VLAN_ID, vlan_dev_info(dev)->vlan_id);
if (vlan->flags) {
f.flags = vlan->flags;
f.mask = ~0;
NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
}
if (vlan->nr_ingress_mappings) {
nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
if (nest == NULL)
goto nla_put_failure;
for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
if (!vlan->ingress_priority_map[i])
continue;
m.from = i;
m.to = vlan->ingress_priority_map[i];
NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
sizeof(m), &m);
}
nla_nest_end(skb, nest);
}
if (vlan->nr_egress_mappings) {
nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
if (nest == NULL)
goto nla_put_failure;
for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
for (pm = vlan->egress_priority_map[i]; pm;
pm = pm->next) {
if (!pm->vlan_qos)
continue;
m.from = pm->priority;
m.to = (pm->vlan_qos >> 13) & 0x7;
NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
sizeof(m), &m);
}
}
nla_nest_end(skb, nest);
}
return 0;
nla_put_failure:
return -EMSGSIZE;
}
struct rtnl_link_ops vlan_link_ops __read_mostly = {
.kind = "vlan",
.maxtype = IFLA_VLAN_MAX,
.policy = vlan_policy,
.priv_size = sizeof(struct vlan_dev_info),
.setup = vlan_setup,
.validate = vlan_validate,
.newlink = vlan_newlink,
.changelink = vlan_changelink,
.dellink = unregister_vlan_dev,
.get_size = vlan_get_size,
.fill_info = vlan_fill_info,
};
int __init vlan_netlink_init(void)
{
return rtnl_link_register(&vlan_link_ops);
}
void __exit vlan_netlink_fini(void)
{
rtnl_link_unregister(&vlan_link_ops);
}
MODULE_ALIAS_RTNL_LINK("vlan");
|
