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) & ~VLAN_FLAG_REORDER_HDR)
66 err = vlan_validate_qos_map(data[IFLA_VLAN_INGRESS_QOS]);
69 err = vlan_validate_qos_map(data[IFLA_VLAN_EGRESS_QOS]);
75 static int vlan_changelink(struct net_device *dev,
76 struct nlattr *tb[], struct nlattr *data[])
78 struct ifla_vlan_flags *flags;
79 struct ifla_vlan_qos_mapping *m;
83 if (data[IFLA_VLAN_FLAGS]) {
84 flags = nla_data(data[IFLA_VLAN_FLAGS]);
85 vlan_dev_change_flags(dev, flags->flags, flags->mask);
87 if (data[IFLA_VLAN_INGRESS_QOS]) {
88 nla_for_each_nested(attr, data[IFLA_VLAN_INGRESS_QOS], rem) {
90 vlan_dev_set_ingress_priority(dev, m->to, m->from);
93 if (data[IFLA_VLAN_EGRESS_QOS]) {
94 nla_for_each_nested(attr, data[IFLA_VLAN_EGRESS_QOS], rem) {
96 vlan_dev_set_egress_priority(dev, m->from, m->to);
102 static int vlan_newlink(struct net_device *dev,
103 struct nlattr *tb[], struct nlattr *data[])
105 struct vlan_dev_info *vlan = vlan_dev_info(dev);
106 struct net_device *real_dev;
109 if (!data[IFLA_VLAN_ID])
114 real_dev = __dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK]));
118 vlan->vlan_id = nla_get_u16(data[IFLA_VLAN_ID]);
119 vlan->real_dev = real_dev;
120 vlan->flags = VLAN_FLAG_REORDER_HDR;
122 err = vlan_check_real_dev(real_dev, vlan->vlan_id);
127 dev->mtu = real_dev->mtu;
128 else if (dev->mtu > real_dev->mtu)
131 err = vlan_changelink(dev, tb, data);
135 return register_vlan_dev(dev);
138 static inline size_t vlan_qos_map_size(unsigned int n)
142 /* IFLA_VLAN_{EGRESS,INGRESS}_QOS + n * IFLA_VLAN_QOS_MAPPING */
143 return nla_total_size(sizeof(struct nlattr)) +
144 nla_total_size(sizeof(struct ifla_vlan_qos_mapping)) * n;
147 static size_t vlan_get_size(const struct net_device *dev)
149 struct vlan_dev_info *vlan = vlan_dev_info(dev);
151 return nla_total_size(2) + /* IFLA_VLAN_ID */
152 vlan_qos_map_size(vlan->nr_ingress_mappings) +
153 vlan_qos_map_size(vlan->nr_egress_mappings);
156 static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
158 struct vlan_dev_info *vlan = vlan_dev_info(dev);
159 struct vlan_priority_tci_mapping *pm;
160 struct ifla_vlan_flags f;
161 struct ifla_vlan_qos_mapping m;
165 NLA_PUT_U16(skb, IFLA_VLAN_ID, vlan_dev_info(dev)->vlan_id);
167 f.flags = vlan->flags;
169 NLA_PUT(skb, IFLA_VLAN_FLAGS, sizeof(f), &f);
171 if (vlan->nr_ingress_mappings) {
172 nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS);
174 goto nla_put_failure;
176 for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) {
177 if (!vlan->ingress_priority_map[i])
181 m.to = vlan->ingress_priority_map[i];
182 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
185 nla_nest_end(skb, nest);
188 if (vlan->nr_egress_mappings) {
189 nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS);
191 goto nla_put_failure;
193 for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
194 for (pm = vlan->egress_priority_map[i]; pm;
199 m.from = pm->priority;
200 m.to = (pm->vlan_qos >> 13) & 0x7;
201 NLA_PUT(skb, IFLA_VLAN_QOS_MAPPING,
205 nla_nest_end(skb, nest);
213 struct rtnl_link_ops vlan_link_ops __read_mostly = {
215 .maxtype = IFLA_VLAN_MAX,
216 .policy = vlan_policy,
217 .priv_size = sizeof(struct vlan_dev_info),
219 .validate = vlan_validate,
220 .newlink = vlan_newlink,
221 .changelink = vlan_changelink,
222 .dellink = unregister_vlan_dev,
223 .get_size = vlan_get_size,
224 .fill_info = vlan_fill_info,
227 int __init vlan_netlink_init(void)
229 return rtnl_link_register(&vlan_link_ops);
232 void __exit vlan_netlink_fini(void)
234 rtnl_link_unregister(&vlan_link_ops);
237 MODULE_ALIAS_RTNL_LINK("vlan");