Commit | Line | Data |
---|---|---|
07b5b17e PM |
1 | /* |
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> | |
3a9a231d | 14 | #include <linux/module.h> |
881d966b | 15 | #include <net/net_namespace.h> |
07b5b17e PM |
16 | #include <net/netlink.h> |
17 | #include <net/rtnetlink.h> | |
18 | #include "vlan.h" | |
19 | ||
20 | ||
21 | static 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 | ||
28 | static 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 | ||
33 | static 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 | ||
40 | static int vlan_validate(struct nlattr *tb[], struct nlattr *data[]) | |
41 | { | |
42 | struct ifla_vlan_flags *flags; | |
43 | u16 id; | |
44 | int err; | |
45 | ||
0e06877c PM |
46 | 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 | ||
07b5b17e PM |
53 | 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]); | |
70c03b49 | 63 | if ((flags->flags & flags->mask) & |
5e756593 PM |
64 | ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
65 | VLAN_FLAG_LOOSE_BINDING)) | |
07b5b17e PM |
66 | 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 | ||
78 | static int vlan_changelink(struct net_device *dev, | |
79 | struct nlattr *tb[], struct nlattr *data[]) | |
80 | { | |
07b5b17e PM |
81 | 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]); | |
b3ce0325 | 88 | vlan_dev_change_flags(dev, flags->flags, flags->mask); |
07b5b17e PM |
89 | } |
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 | ||
81adee47 | 105 | static int vlan_newlink(struct net *src_net, struct net_device *dev, |
07b5b17e PM |
106 | struct nlattr *tb[], struct nlattr *data[]) |
107 | { | |
7da82c06 | 108 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
07b5b17e PM |
109 | 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; | |
81adee47 | 117 | real_dev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
07b5b17e PM |
118 | 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 | ||
07b5b17e PM |
141 | static 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 | ||
150 | static size_t vlan_get_size(const struct net_device *dev) | |
151 | { | |
7da82c06 | 152 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
07b5b17e PM |
153 | |
154 | return nla_total_size(2) + /* IFLA_VLAN_ID */ | |
fc482cc5 | 155 | sizeof(struct ifla_vlan_flags) + /* IFLA_VLAN_FLAGS */ |
07b5b17e PM |
156 | vlan_qos_map_size(vlan->nr_ingress_mappings) + |
157 | vlan_qos_map_size(vlan->nr_egress_mappings); | |
158 | } | |
159 | ||
160 | static int vlan_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
161 | { | |
7da82c06 | 162 | struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
07b5b17e PM |
163 | 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 | ||
61849dda DM |
169 | if (nla_put_u16(skb, IFLA_VLAN_ID, vlan_dev_priv(dev)->vlan_id)) |
170 | goto nla_put_failure; | |
07b5b17e PM |
171 | if (vlan->flags) { |
172 | f.flags = vlan->flags; | |
173 | f.mask = ~0; | |
61849dda DM |
174 | if (nla_put(skb, IFLA_VLAN_FLAGS, sizeof(f), &f)) |
175 | goto nla_put_failure; | |
07b5b17e PM |
176 | } |
177 | if (vlan->nr_ingress_mappings) { | |
178 | nest = nla_nest_start(skb, IFLA_VLAN_INGRESS_QOS); | |
179 | if (nest == NULL) | |
180 | goto nla_put_failure; | |
181 | ||
182 | for (i = 0; i < ARRAY_SIZE(vlan->ingress_priority_map); i++) { | |
183 | if (!vlan->ingress_priority_map[i]) | |
184 | continue; | |
185 | ||
186 | m.from = i; | |
187 | m.to = vlan->ingress_priority_map[i]; | |
61849dda DM |
188 | if (nla_put(skb, IFLA_VLAN_QOS_MAPPING, |
189 | sizeof(m), &m)) | |
190 | goto nla_put_failure; | |
07b5b17e PM |
191 | } |
192 | nla_nest_end(skb, nest); | |
193 | } | |
194 | ||
195 | if (vlan->nr_egress_mappings) { | |
196 | nest = nla_nest_start(skb, IFLA_VLAN_EGRESS_QOS); | |
197 | if (nest == NULL) | |
198 | goto nla_put_failure; | |
199 | ||
200 | for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { | |
201 | for (pm = vlan->egress_priority_map[i]; pm; | |
202 | pm = pm->next) { | |
203 | if (!pm->vlan_qos) | |
204 | continue; | |
205 | ||
206 | m.from = pm->priority; | |
207 | m.to = (pm->vlan_qos >> 13) & 0x7; | |
61849dda DM |
208 | if (nla_put(skb, IFLA_VLAN_QOS_MAPPING, |
209 | sizeof(m), &m)) | |
210 | goto nla_put_failure; | |
07b5b17e PM |
211 | } |
212 | } | |
213 | nla_nest_end(skb, nest); | |
214 | } | |
215 | return 0; | |
216 | ||
217 | nla_put_failure: | |
218 | return -EMSGSIZE; | |
219 | } | |
220 | ||
221 | struct rtnl_link_ops vlan_link_ops __read_mostly = { | |
222 | .kind = "vlan", | |
223 | .maxtype = IFLA_VLAN_MAX, | |
224 | .policy = vlan_policy, | |
7da82c06 | 225 | .priv_size = sizeof(struct vlan_dev_priv), |
07b5b17e PM |
226 | .setup = vlan_setup, |
227 | .validate = vlan_validate, | |
228 | .newlink = vlan_newlink, | |
229 | .changelink = vlan_changelink, | |
af301517 | 230 | .dellink = unregister_vlan_dev, |
07b5b17e PM |
231 | .get_size = vlan_get_size, |
232 | .fill_info = vlan_fill_info, | |
233 | }; | |
234 | ||
235 | int __init vlan_netlink_init(void) | |
236 | { | |
237 | return rtnl_link_register(&vlan_link_ops); | |
238 | } | |
239 | ||
240 | void __exit vlan_netlink_fini(void) | |
241 | { | |
242 | rtnl_link_unregister(&vlan_link_ops); | |
243 | } | |
244 | ||
245 | MODULE_ALIAS_RTNL_LINK("vlan"); |