2 * VLAN netlink control interface
4 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
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.
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/if_vlan.h>
14 #include <net/netlink.h>
15 #include <net/rtnetlink.h>
19 static const struct nla_policy vlan_policy[IFLA_VLAN_MAX + 1] = {
20 [IFLA_VLAN_ID] = { .type = NLA_U16 },
21 [IFLA_VLAN_FLAGS] = { .len = sizeof(struct ifla_vlan_flags) },
22 [IFLA_VLAN_EGRESS_QOS] = { .type = NLA_NESTED },
23 [IFLA_VLAN_INGRESS_QOS] = { .type = NLA_NESTED },
26 static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
27 [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
31 static inline int vlan_validate_qos_map(struct nlattr *attr)
35 return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
38 static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
40 struct ifla_vlan_flags *flags;
47 if (data[IFLA_VLAN_ID]) {
48 id = nla_get_u16(data[IFLA_VLAN_ID]);
49 if (id >= VLAN_VID_MASK)
52 if (data[IFLA_VLAN_FLAGS]) {
53 flags = nla_data(data[IFLA_VLAN_FLAGS]);
54 if ((flags->flags & flags->mask) & ~VLAN_FLAG_REORDER_HDR)
58 err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
61 err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
67 static int vlan_changelink(struct net_device *dev,
68 struct nlattr *tb[], struct nlattr *data[])
70 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
71 struct ifla_vlan_flags *flags;
72 struct ifla_vlan_qos_mapping *m;
76 if (data[IFLA_VLAN_FLAGS]) {
77 flags = nla_data(data[IFLA_VLAN_FLAGS]);
78 vlan->flags = (vlan->flags & ~flags->mask) |
79 (flags->flags & flags->mask);
81 if (data[IFLA_VLAN_INGRESS_QOS]) {
82 nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
84 vlan_dev_set_ingress_priority(dev, m->to, m->from);
87 if (data[IFLA_VLAN_EGRESS_QOS]) {
88 nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
90 vlan_dev_set_egress_priority(dev, m->from, m->to);
96 static int vlan_newlink(struct net_device *dev,
97 struct nlattr *tb[], struct nlattr *data[])
99 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
100 struct net_device *real_dev;
103 if (!data[IFLA_VLAN_ID])
108 real_dev = __dev_get_by_index(nla_get_u32(tb[IFLA_LINK]));
112 vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
113 vlan->real_dev = real_dev;
114 vlan->flags = VLAN_FLAG_REORDER_HDR;
116 err = vlan_check_real_dev(real_dev, vlan->vlan_id);
121 dev->mtu = real_dev->mtu;
122 else if (dev->mtu > real_dev->mtu)
125 err = vlan_changelink(dev, tb, data);
129 return register_vlan_dev(dev);
132 static void vlan_dellink(struct net_device *dev)
134 unregister_vlan_device(dev);
137 static inline size_t vlan_qos_map_size(unsigned int n)
141 /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
142 return nla_total_size(sizeof(struct nlattr)) +
143 nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
146 static size_t vlan_get_size(const struct net_device *dev)
148 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
150 return nla_total_size(2) + /* IFLA_VLAN_ID */
151 vlan_qos_map_size(vlan->nr_ingress_mappings) +
152 vlan_qos_map_size(vlan->nr_egress_mappings);
155 static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
157 struct vlan_dev_info *vlan = VLAN_DEV_INFO(dev);
158 struct vlan_priority_tci_mapping *pm;
159 struct ifla_vlan_flags f;
160 struct ifla_vlan_qos_mapping m;
164 NLA_PUT_U16(skb, IFLA_VLAN_ID, VLAN_DEV_INFO(dev)->vlan_id);
166 f.flags = vlan->flags;
168 NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
170 if (vlan->nr_ingress_mappings) {
171 nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
173 goto nla_put_failure;
175 for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
176 if (!vlan->ingress_priority_map[i])
180 m.to = vlan->ingress_priority_map[i];
181 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
184 nla_nest_end(skb, nest);
187 if (vlan->nr_egress_mappings) {
188 nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
190 goto nla_put_failure;
192 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
193 for (pm = vlan->egress_priority_map[i]; pm;
198 m.from = pm->priority;
199 m.to = (pm->vlan_qos >> 13) & 0x7;
200 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
204 nla_nest_end(skb, nest);
212 struct rtnl_link_ops vlan_link_ops __read_mostly = {
214 .maxtype = IFLA_VLAN_MAX,
215 .policy = vlan_policy,
216 .priv_size = sizeof(struct vlan_dev_info),
218 .validate = vlan_validate,
219 .newlink = vlan_newlink,
220 .changelink = vlan_changelink,
221 .dellink = vlan_dellink,
222 .get_size = vlan_get_size,
223 .fill_info = vlan_fill_info,
226 int __init vlan_netlink_init(void)
228 return rtnl_link_register(&vlan_link_ops);
231 void __exit vlan_netlink_fini(void)
233 rtnl_link_unregister(&vlan_link_ops);
236 MODULE_ALIAS_RTNL_LINK("vlan");