blob: be9a5c19a775aa64751b93795ccd5df1a453297a [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>
Eric W. Biederman881d9662007-09-17 11:56:21 -070014#include <net/net_namespace.h>
Patrick McHardy07b5b172007-06-13 12:07:54 -070015#include <net/netlink.h>
16#include <net/rtnetlink.h>
17#include "vlan.h"
18
19
20static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
21 [IFLA_VLAN_ID] = { .type = NLA_U16 },
22 [IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
23 [IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
24 [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
25};
26
27static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
28 [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
29};
30
31
32static inline int vlan_validate_qos_map(struct nlattr *attr)
33{
34 if (!attr)
35 return 0;
36 return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
37}
38
39static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
40{
41 struct ifla_vlan_flags *flags;
42 u16 id;
43 int err;
44
Patrick McHardy0e068772007-07-11 19:42:31 -070045 if (tb[IFLA_ADDRESS]) {
46 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
47 return -EINVAL;
48 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
49 return -EADDRNOTAVAIL;
50 }
51
Patrick McHardy07b5b172007-06-13 12:07:54 -070052 if (!data)
53 return -EINVAL;
54
55 if (data[IFLA_VLAN_ID]) {
56 id = nla_get_u16(data[IFLA_VLAN_ID]);
57 if (id >= VLAN_VID_MASK)
58 return -ERANGE;
59 }
60 if (data[IFLA_VLAN_FLAGS]) {
61 flags = nla_data(data[IFLA_VLAN_FLAGS]);
Patrick McHardy70c03b42008-07-05 21:26:57 -070062 if ((flags->flags & flags->mask) &
Patrick McHardy5e756592009-11-25 07:54:54 +000063 ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP |
64 VLAN_FLAG_LOOSE_BINDING))
Patrick McHardy07b5b172007-06-13 12:07:54 -070065 return -EINVAL;
66 }
67
68 err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
69 if (err < 0)
70 return err;
71 err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
72 if (err < 0)
73 return err;
74 return 0;
75}
76
77static int vlan_changelink(struct net_device *dev,
78 struct nlattr *tb[], struct nlattr *data[])
79{
Patrick McHardy07b5b172007-06-13 12:07:54 -070080 struct ifla_vlan_flags *flags;
81 struct ifla_vlan_qos_mapping *m;
82 struct nlattr *attr;
83 int rem;
84
85 if (data[IFLA_VLAN_FLAGS]) {
86 flags = nla_data(data[IFLA_VLAN_FLAGS]);
Patrick McHardyb3ce0322008-07-05 21:26:27 -070087 vlan_dev_change_flags(dev, flags->flags, flags->mask);
Patrick McHardy07b5b172007-06-13 12:07:54 -070088 }
89 if (data[IFLA_VLAN_INGRESS_QOS]) {
90 nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
91 m = nla_data(attr);
92 vlan_dev_set_ingress_priority(dev, m->to, m->from);
93 }
94 }
95 if (data[IFLA_VLAN_EGRESS_QOS]) {
96 nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
97 m = nla_data(attr);
98 vlan_dev_set_egress_priority(dev, m->from, m->to);
99 }
100 }
101 return 0;
102}
103
Eric W. Biederman81adee42009-11-08 00:53:51 -0800104static int vlan_newlink(struct net *src_net, struct net_device *dev,
Patrick McHardy07b5b172007-06-13 12:07:54 -0700105 struct nlattr *tb[], struct nlattr *data[])
106{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800107 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700108 struct net_device *real_dev;
109 int err;
110
111 if (!data[IFLA_VLAN_ID])
112 return -EINVAL;
113
114 if (!tb[IFLA_LINK])
115 return -EINVAL;
Eric W. Biederman81adee42009-11-08 00:53:51 -0800116 real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardy07b5b172007-06-13 12:07:54 -0700117 if (!real_dev)
118 return -ENODEV;
119
120 vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
121 vlan->real_dev = real_dev;
122 vlan->flags = VLAN_FLAG_REORDER_HDR;
123
124 err = vlan_check_real_dev(real_dev, vlan->vlan_id);
125 if (err < 0)
126 return err;
127
128 if (!tb[IFLA_MTU])
129 dev->mtu = real_dev->mtu;
130 else if (dev->mtu > real_dev->mtu)
131 return -EINVAL;
132
133 err = vlan_changelink(dev, tb, data);
134 if (err < 0)
135 return err;
136
137 return register_vlan_dev(dev);
138}
139
Patrick McHardy07b5b172007-06-13 12:07:54 -0700140static inline size_t vlan_qos_map_size(unsigned int n)
141{
142 if (n == 0)
143 return 0;
144 /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
145 return nla_total_size(sizeof(struct nlattr)) +
146 nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
147}
148
149static size_t vlan_get_size(const struct net_device *dev)
150{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800151 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700152
153 return nla_total_size(2) + /* IFLA_VLAN_ID */
John Fastabendfc482cc2009-09-25 13:11:24 +0000154 sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */
Patrick McHardy07b5b172007-06-13 12:07:54 -0700155 vlan_qos_map_size(vlan->nr_ingress_mappings) +
156 vlan_qos_map_size(vlan->nr_egress_mappings);
157}
158
159static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
160{
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800161 struct vlan_dev_info *vlan = vlan_dev_info(dev);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700162 struct vlan_priority_tci_mapping *pm;
163 struct ifla_vlan_flags f;
164 struct ifla_vlan_qos_mapping m;
165 struct nlattr *nest;
166 unsigned int i;
167
Patrick McHardy9dfebcc2008-01-21 00:26:07 -0800168 NLA_PUT_U16(skb, IFLA_VLAN_ID, vlan_dev_info(dev)->vlan_id);
Patrick McHardy07b5b172007-06-13 12:07:54 -0700169 if (vlan->flags) {
170 f.flags = vlan->flags;
171 f.mask = ~0;
172 NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
173 }
174 if (vlan->nr_ingress_mappings) {
175 nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
176 if (nest == NULL)
177 goto nla_put_failure;
178
179 for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
180 if (!vlan->ingress_priority_map[i])
181 continue;
182
183 m.from = i;
184 m.to = vlan->ingress_priority_map[i];
185 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
186 sizeof(m), &m);
187 }
188 nla_nest_end(skb, nest);
189 }
190
191 if (vlan->nr_egress_mappings) {
192 nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
193 if (nest == NULL)
194 goto nla_put_failure;
195
196 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
197 for (pm = vlan->egress_priority_map[i]; pm;
198 pm = pm->next) {
199 if (!pm->vlan_qos)
200 continue;
201
202 m.from = pm->priority;
203 m.to = (pm->vlan_qos >> 13) & 0x7;
204 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
205 sizeof(m), &m);
206 }
207 }
208 nla_nest_end(skb, nest);
209 }
210 return 0;
211
212nla_put_failure:
213 return -EMSGSIZE;
214}
215
216struct rtnl_link_ops vlan_link_ops __read_mostly = {
217 .kind = "vlan",
218 .maxtype = IFLA_VLAN_MAX,
219 .policy = vlan_policy,
220 .priv_size = sizeof(struct vlan_dev_info),
221 .setup = vlan_setup,
222 .validate = vlan_validate,
223 .newlink = vlan_newlink,
224 .changelink = vlan_changelink,
Patrick McHardyaf301512008-01-21 00:25:50 -0800225 .dellink = unregister_vlan_dev,
Patrick McHardy07b5b172007-06-13 12:07:54 -0700226 .get_size = vlan_get_size,
227 .fill_info = vlan_fill_info,
228};
229
230int __init vlan_netlink_init(void)
231{
232 return rtnl_link_register(&vlan_link_ops);
233}
234
235void __exit vlan_netlink_fini(void)
236{
237 rtnl_link_unregister(&vlan_link_ops);
238}
239
240MODULE_ALIAS_RTNL_LINK("vlan");