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/net_namespace.h>
15 #include <net/netlink.h>
16 #include <net/rtnetlink.h>
20 static 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 },
27 static const struct nla_policy vlan_map_policy[IFLA_VLAN_QOS_MAX + 1] = {
28 [IFLA_VLAN_QOS_MAPPING] = { .len = sizeof(struct ifla_vlan_qos_mapping) },
32 static inline int vlan_validate_qos_map(struct nlattr *attr)
36 return nla_validate_nested(attr, IFLA_VLAN_QOS_MAX, vlan_map_policy);
39 static int vlan_validate(struct nlattr *tb[], struct nlattr *data[])
41 struct ifla_vlan_flags *flags;
45 if (tb[IFLA_ADDRESS]) {
46 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
48 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
49 return -EADDRNOTAVAIL;
55 if (data[IFLA_VLAN_ID]) {
56 id = nla_get_u16(data[IFLA_VLAN_ID]);
57 if (id >= VLAN_VID_MASK)
60 if (data[IFLA_VLAN_FLAGS]) {
61 flags = nla_data(data[IFLA_VLAN_FLAGS]);
62 if ((flags->flags & flags->mask) &
63 ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP))
67 err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
70 err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
76 static int vlan_changelink(struct net_device *dev,
77 struct nlattr *tb[], struct nlattr *data[])
79 struct ifla_vlan_flags *flags;
80 struct ifla_vlan_qos_mapping *m;
84 if (data[IFLA_VLAN_FLAGS]) {
85 flags = nla_data(data[IFLA_VLAN_FLAGS]);
86 vlan_dev_change_flags(dev, flags->flags, flags->mask);
88 if (data[IFLA_VLAN_INGRESS_QOS]) {
89 nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
91 vlan_dev_set_ingress_priority(dev, m->to, m->from);
94 if (data[IFLA_VLAN_EGRESS_QOS]) {
95 nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
97 vlan_dev_set_egress_priority(dev, m->from, m->to);
103 static int vlan_get_tx_queues(struct net *net,
105 unsigned int *num_tx_queues,
106 unsigned int *real_num_tx_queues)
108 struct net_device *real_dev;
113 real_dev = __dev_get_by_index(net, nla_get_u32(tb[IFLA_LINK]));
117 *num_tx_queues = real_dev->num_tx_queues;
118 *real_num_tx_queues = real_dev->real_num_tx_queues;
122 static int vlan_newlink(struct net_device *dev,
123 struct nlattr *tb[], struct nlattr *data[])
125 struct vlan_dev_info *vlan = vlan_dev_info(dev);
126 struct net_device *real_dev;
129 if (!data[IFLA_VLAN_ID])
134 real_dev = __dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK]));
138 vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
139 vlan->real_dev = real_dev;
140 vlan->flags = VLAN_FLAG_REORDER_HDR;
142 err = vlan_check_real_dev(real_dev, vlan->vlan_id);
147 dev->mtu = real_dev->mtu;
148 else if (dev->mtu > real_dev->mtu)
151 err = vlan_changelink(dev, tb, data);
155 return register_vlan_dev(dev);
158 static inline size_t vlan_qos_map_size(unsigned int n)
162 /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
163 return nla_total_size(sizeof(struct nlattr)) +
164 nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
167 static size_t vlan_get_size(const struct net_device *dev)
169 struct vlan_dev_info *vlan = vlan_dev_info(dev);
171 return nla_total_size(2) + /* IFLA_VLAN_ID */
172 vlan_qos_map_size(vlan->nr_ingress_mappings) +
173 vlan_qos_map_size(vlan->nr_egress_mappings);
176 static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
178 struct vlan_dev_info *vlan = vlan_dev_info(dev);
179 struct vlan_priority_tci_mapping *pm;
180 struct ifla_vlan_flags f;
181 struct ifla_vlan_qos_mapping m;
185 NLA_PUT_U16(skb, IFLA_VLAN_ID, vlan_dev_info(dev)->vlan_id);
187 f.flags = vlan->flags;
189 NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
191 if (vlan->nr_ingress_mappings) {
192 nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
194 goto nla_put_failure;
196 for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
197 if (!vlan->ingress_priority_map[i])
201 m.to = vlan->ingress_priority_map[i];
202 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
205 nla_nest_end(skb, nest);
208 if (vlan->nr_egress_mappings) {
209 nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
211 goto nla_put_failure;
213 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
214 for (pm = vlan->egress_priority_map[i]; pm;
219 m.from = pm->priority;
220 m.to = (pm->vlan_qos >> 13) & 0x7;
221 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
225 nla_nest_end(skb, nest);
233 struct rtnl_link_ops vlan_link_ops __read_mostly = {
235 .maxtype = IFLA_VLAN_MAX,
236 .policy = vlan_policy,
237 .priv_size = sizeof(struct vlan_dev_info),
238 .get_tx_queues = vlan_get_tx_queues,
240 .validate = vlan_validate,
241 .newlink = vlan_newlink,
242 .changelink = vlan_changelink,
243 .dellink = unregister_vlan_dev,
244 .get_size = vlan_get_size,
245 .fill_info = vlan_fill_info,
248 int __init vlan_netlink_init(void)
250 return rtnl_link_register(&vlan_link_ops);
253 void __exit vlan_netlink_fini(void)
255 rtnl_link_unregister(&vlan_link_ops);
258 MODULE_ALIAS_RTNL_LINK("vlan");