blob: 50711368ad6a964726de2b284f84ca7d77468759 [file] [log] [blame]
Patrick McHardy07b5b172007-06-13 12:07:54 -07001/*
2 * VLAN netlink control interface
3 *
4 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 */
10
11#include <linux/kernel.h>
12#include <linux/netdevice.h>
13#include <linux/if_vlan.h>
Paul Gortmaker3a9a2312011-05-27 09:12:25 -040014#include <linux/module.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070015#include <net/net_namespace.h>
Patrick McHardy07b5b172007-06-13 12:07:54 -070016#include <net/netlink.h>
17#include <net/rtnetlink.h>
18#include "vlan.h"
19
20
21static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
22 [IFLA_VLAN_ID] = { .type = NLA_U16 },
23 [IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
24 [IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
25 [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
26};
27
28static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
29 [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
30};
31
32
33static inline int vlan_validate_qos_map(struct nlattr *attr)
34{
35 if (!attr)
36 return 0;
37 return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
38}
39
40static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
41{
42 struct ifla_vlan_flags *flags;
43 u16 id;
44 int err;
45
Patrick McHardy0e068772007-07-11 19:42:31 -070046 if (tb[IFLA_ADDRESS]) {
47 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
48 return -EINVAL;
49 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
50 return -EADDRNOTAVAIL;
51 }
52
Patrick McHardy07b5b172007-06-13 12:07:54 -070053 if (!data)
54 return -EINVAL;
55
56 if (data[IFLA_VLAN_ID]) {
57 id = nla_get_u16(data[IFLA_VLAN_ID]);
58 if (id >= VLAN_VID_MASK)
59 return -ERANGE;
60 }
61 if (data[IFLA_VLAN_FLAGS]) {
62 flags = nla_data(data[IFLA_VLAN_FLAGS]);
Patrick McHardy70c03b42008-07-05 21:26:57 -070063 if ((flags->flags & flags->mask) &
Patrick McHardy5e756592009-11-25 07:54:54 +000064 ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
65 VLAN_FLAG_LOOSE_BINDING))
Patrick McHardy07b5b172007-06-13 12:07:54 -070066 return -EINVAL;
67 }
68
69 err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
70 if (err < 0)
71 return err;
72 err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
73 if (err < 0)
74 return err;
75 return 0;
76}
77
78static int vlan_changelink(struct net_device *dev,
79 struct nlattr *tb[], struct nlattr *data[])
80{
Patrick McHardy07b5b172007-06-13 12:07:54 -070081 struct ifla_vlan_flags *flags;
82 struct ifla_vlan_qos_mapping *m;
83 struct nlattr *attr;
84 int rem;
85
86 if (data[IFLA_VLAN_FLAGS]) {
87 flags = nla_data(data[IFLA_VLAN_FLAGS]);
Patrick McHardyb3ce0322008-07-05 21:26:27 -070088 vlan_dev_change_flags(dev, flags->flags, flags->mask);
Patrick McHardy07b5b172007-06-13 12:07:54 -070089 }
90 if (data[IFLA_VLAN_INGRESS_QOS]) {
91 nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
92 m = nla_data(attr);
93 vlan_dev_set_ingress_priority(dev, m->to, m->from);
94 }
95 }
96 if (data[IFLA_VLAN_EGRESS_QOS]) {
97 nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
98 m = nla_data(attr);
99 vlan_dev_set_egress_priority(dev, m->from, m->to);
100 }
101 }
102 return 0;
103}
104
Eric W. Biederman81adee42009-11-08 00:53:51 -0800105static int vlan_newlink(struct net *src_net, struct net_device *dev,
Patrick McHardy07b5b172007-06-13 12:07:54 -0700106 struct nlattr *tb[], struct nlattr *data[])
107{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000108 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700109 struct net_device *real_dev;
110 int err;
111
112 if (!data[IFLA_VLAN_ID])
113 return -EINVAL;
114
115 if (!tb[IFLA_LINK])
116 return -EINVAL;
Eric W. Biederman81adee42009-11-08 00:53:51 -0800117 real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardy07b5b172007-06-13 12:07:54 -0700118 if (!real_dev)
119 return -ENODEV;
120
121 vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
122 vlan->real_dev = real_dev;
123 vlan->flags = VLAN_FLAG_REORDER_HDR;
124
125 err = vlan_check_real_dev(real_dev, vlan->vlan_id);
126 if (err < 0)
127 return err;
128
129 if (!tb[IFLA_MTU])
130 dev->mtu = real_dev->mtu;
131 else if (dev->mtu > real_dev->mtu)
132 return -EINVAL;
133
134 err = vlan_changelink(dev, tb, data);
135 if (err < 0)
136 return err;
137
138 return register_vlan_dev(dev);
139}
140
Patrick McHardy07b5b172007-06-13 12:07:54 -0700141static inline size_t vlan_qos_map_size(unsigned int n)
142{
143 if (n == 0)
144 return 0;
145 /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
146 return nla_total_size(sizeof(struct nlattr)) +
147 nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
148}
149
150static size_t vlan_get_size(const struct net_device *dev)
151{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000152 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700153
154 return nla_total_size(2) + /* IFLA_VLAN_ID */
John Fastabendfc482cc2009-09-25 13:11:24 +0000155 sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
Patrick McHardy07b5b172007-06-13 12:07:54 -0700156 vlan_qos_map_size(vlan->nr_ingress_mappings) +
157 vlan_qos_map_size(vlan->nr_egress_mappings);
158}
159
160static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
161{
Jiri Pirko7da82c02011-12-08 04:11:15 +0000162 struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700163 struct vlan_priority_tci_mapping *pm;
164 struct ifla_vlan_flags f;
165 struct ifla_vlan_qos_mapping m;
166 struct nlattr *nest;
167 unsigned int i;
168
Jiri Pirko7da82c02011-12-08 04:11:15 +0000169 NLA_PUT_U16(skb, IFLA_VLAN_ID, vlan_dev_priv(dev)->vlan_id);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700170 if (vlan->flags) {
171 f.flags = vlan->flags;
172 f.mask = ~0;
173 NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
174 }
175 if (vlan->nr_ingress_mappings) {
176 nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
177 if (nest == NULL)
178 goto nla_put_failure;
179
180 for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
181 if (!vlan->ingress_priority_map[i])
182 continue;
183
184 m.from = i;
185 m.to = vlan->ingress_priority_map[i];
186 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
187 sizeof(m), &m);
188 }
189 nla_nest_end(skb, nest);
190 }
191
192 if (vlan->nr_egress_mappings) {
193 nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
194 if (nest == NULL)
195 goto nla_put_failure;
196
197 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
198 for (pm = vlan->egress_priority_map[i]; pm;
199 pm = pm->next) {
200 if (!pm->vlan_qos)
201 continue;
202
203 m.from = pm->priority;
204 m.to = (pm->vlan_qos >> 13) & 0x7;
205 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
206 sizeof(m), &m);
207 }
208 }
209 nla_nest_end(skb, nest);
210 }
211 return 0;
212
213nla_put_failure:
214 return -EMSGSIZE;
215}
216
217struct rtnl_link_ops vlan_link_ops __read_mostly = {
218 .kind = "vlan",
219 .maxtype = IFLA_VLAN_MAX,
220 .policy = vlan_policy,
Jiri Pirko7da82c02011-12-08 04:11:15 +0000221 .priv_size = sizeof(struct vlan_dev_priv),
Patrick McHardy07b5b172007-06-13 12:07:54 -0700222 .setup = vlan_setup,
223 .validate = vlan_validate,
224 .newlink = vlan_newlink,
225 .changelink = vlan_changelink,
Patrick McHardyaf301512008-01-21 00:25:50 -0800226 .dellink = unregister_vlan_dev,
Patrick McHardy07b5b172007-06-13 12:07:54 -0700227 .get_size = vlan_get_size,
228 .fill_info = vlan_fill_info,
229};
230
231int __init vlan_netlink_init(void)
232{
233 return rtnl_link_register(&vlan_link_ops);
234}
235
236void __exit vlan_netlink_fini(void)
237{
238 rtnl_link_unregister(&vlan_link_ops);
239}
240
241MODULE_ALIAS_RTNL_LINK("vlan");