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1/*
2 * Bridge per vlan tunnel port dst_metadata netlink control interface
3 *
4 * Authors:
5 * Roopa Prabhu <roopa@cumulusnetworks.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/etherdevice.h>
16#include <net/rtnetlink.h>
17#include <net/net_namespace.h>
18#include <net/sock.h>
19#include <uapi/linux/if_bridge.h>
20#include <net/dst_metadata.h>
21
22#include "br_private.h"
23#include "br_private_tunnel.h"
24
25static size_t __get_vlan_tinfo_size(void)
26{
27 return nla_total_size(0) + /* nest IFLA_BRIDGE_VLAN_TUNNEL_INFO */
28 nla_total_size(sizeof(u32)) + /* IFLA_BRIDGE_VLAN_TUNNEL_ID */
29 nla_total_size(sizeof(u16)) + /* IFLA_BRIDGE_VLAN_TUNNEL_VID */
30 nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_VLAN_TUNNEL_FLAGS */
31}
32
33static bool vlan_tunid_inrange(struct net_bridge_vlan *v_curr,
34 struct net_bridge_vlan *v_last)
35{
36 __be32 tunid_curr = tunnel_id_to_key32(v_curr->tinfo.tunnel_id);
37 __be32 tunid_last = tunnel_id_to_key32(v_last->tinfo.tunnel_id);
38
39 return (be32_to_cpu(tunid_curr) - be32_to_cpu(tunid_last)) == 1;
40}
41
42static int __get_num_vlan_tunnel_infos(struct net_bridge_vlan_group *vg)
43{
44 struct net_bridge_vlan *v, *vtbegin = NULL, *vtend = NULL;
45 int num_tinfos = 0;
46
47 /* Count number of vlan infos */
48 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
49 /* only a context, bridge vlan not activated */
50 if (!br_vlan_should_use(v) || !v->tinfo.tunnel_id)
51 continue;
52
53 if (!vtbegin) {
54 goto initvars;
55 } else if ((v->vid - vtend->vid) == 1 &&
56 vlan_tunid_inrange(v, vtend)) {
57 vtend = v;
58 continue;
59 } else {
60 if ((vtend->vid - vtbegin->vid) > 0)
61 num_tinfos += 2;
62 else
63 num_tinfos += 1;
64 }
65initvars:
66 vtbegin = v;
67 vtend = v;
68 }
69
70 if (vtbegin && vtend) {
71 if ((vtend->vid - vtbegin->vid) > 0)
72 num_tinfos += 2;
73 else
74 num_tinfos += 1;
75 }
76
77 return num_tinfos;
78}
79
80int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg)
81{
82 int num_tinfos;
83
84 if (!vg)
85 return 0;
86
87 rcu_read_lock();
88 num_tinfos = __get_num_vlan_tunnel_infos(vg);
89 rcu_read_unlock();
90
91 return num_tinfos * __get_vlan_tinfo_size();
92}
93
94static int br_fill_vlan_tinfo(struct sk_buff *skb, u16 vid,
95 __be64 tunnel_id, u16 flags)
96{
97 __be32 tid = tunnel_id_to_key32(tunnel_id);
98 struct nlattr *tmap;
99
100 tmap = nla_nest_start(skb, IFLA_BRIDGE_VLAN_TUNNEL_INFO);
101 if (!tmap)
102 return -EMSGSIZE;
103 if (nla_put_u32(skb, IFLA_BRIDGE_VLAN_TUNNEL_ID,
104 be32_to_cpu(tid)))
105 goto nla_put_failure;
106 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_VID,
107 vid))
108 goto nla_put_failure;
109 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_FLAGS,
110 flags))
111 goto nla_put_failure;
112 nla_nest_end(skb, tmap);
113
114 return 0;
115
116nla_put_failure:
117 nla_nest_cancel(skb, tmap);
118
119 return -EMSGSIZE;
120}
121
122static int br_fill_vlan_tinfo_range(struct sk_buff *skb,
123 struct net_bridge_vlan *vtbegin,
124 struct net_bridge_vlan *vtend)
125{
126 int err;
127
128 if (vtend && (vtend->vid - vtbegin->vid) > 0) {
129 /* add range to skb */
130 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
131 vtbegin->tinfo.tunnel_id,
132 BRIDGE_VLAN_INFO_RANGE_BEGIN);
133 if (err)
134 return err;
135
136 err = br_fill_vlan_tinfo(skb, vtend->vid,
137 vtend->tinfo.tunnel_id,
138 BRIDGE_VLAN_INFO_RANGE_END);
139 if (err)
140 return err;
141 } else {
142 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
143 vtbegin->tinfo.tunnel_id,
144 0);
145 if (err)
146 return err;
147 }
148
149 return 0;
150}
151
152int br_fill_vlan_tunnel_info(struct sk_buff *skb,
153 struct net_bridge_vlan_group *vg)
154{
155 struct net_bridge_vlan *vtbegin = NULL;
156 struct net_bridge_vlan *vtend = NULL;
157 struct net_bridge_vlan *v;
158 int err;
159
160 /* Count number of vlan infos */
161 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
162 /* only a context, bridge vlan not activated */
163 if (!br_vlan_should_use(v))
164 continue;
165
166 if (!v->tinfo.tunnel_dst)
167 continue;
168
169 if (!vtbegin) {
170 goto initvars;
171 } else if ((v->vid - vtend->vid) == 1 &&
172 vlan_tunid_inrange(v, vtend)) {
173 vtend = v;
174 continue;
175 } else {
176 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
177 if (err)
178 return err;
179 }
180initvars:
181 vtbegin = v;
182 vtend = v;
183 }
184
185 if (vtbegin) {
186 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
187 if (err)
188 return err;
189 }
190
191 return 0;
192}
193
194static const struct nla_policy vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1] = {
195 [IFLA_BRIDGE_VLAN_TUNNEL_ID] = { .type = NLA_U32 },
196 [IFLA_BRIDGE_VLAN_TUNNEL_VID] = { .type = NLA_U16 },
197 [IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
198};
199
200static int br_vlan_tunnel_info(struct net_bridge_port *p, int cmd,
201 u16 vid, u32 tun_id, bool *changed)
202{
203 int err = 0;
204
205 if (!p)
206 return -EINVAL;
207
208 switch (cmd) {
209 case RTM_SETLINK:
210 err = nbp_vlan_tunnel_info_add(p, vid, tun_id);
211 if (!err)
212 *changed = true;
213 break;
214 case RTM_DELLINK:
215 if (!nbp_vlan_tunnel_info_delete(p, vid))
216 *changed = true;
217 break;
218 }
219
220 return err;
221}
222
223int br_parse_vlan_tunnel_info(struct nlattr *attr,
224 struct vtunnel_info *tinfo)
225{
226 struct nlattr *tb[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1];
227 u32 tun_id;
228 u16 vid, flags = 0;
229 int err;
230
231 memset(tinfo, 0, sizeof(*tinfo));
232
233 err = nla_parse_nested(tb, IFLA_BRIDGE_VLAN_TUNNEL_MAX, attr,
234 vlan_tunnel_policy, NULL);
235 if (err < 0)
236 return err;
237
238 if (!tb[IFLA_BRIDGE_VLAN_TUNNEL_ID] ||
239 !tb[IFLA_BRIDGE_VLAN_TUNNEL_VID])
240 return -EINVAL;
241
242 tun_id = nla_get_u32(tb[IFLA_BRIDGE_VLAN_TUNNEL_ID]);
243 vid = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_VID]);
244 if (vid >= VLAN_VID_MASK)
245 return -ERANGE;
246
247 if (tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS])
248 flags = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS]);
249
250 tinfo->tunid = tun_id;
251 tinfo->vid = vid;
252 tinfo->flags = flags;
253
254 return 0;
255}
256
257int br_process_vlan_tunnel_info(struct net_bridge *br,
258 struct net_bridge_port *p, int cmd,
259 struct vtunnel_info *tinfo_curr,
260 struct vtunnel_info *tinfo_last,
261 bool *changed)
262{
263 int err;
264
265 if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
266 if (tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN)
267 return -EINVAL;
268 memcpy(tinfo_last, tinfo_curr, sizeof(struct vtunnel_info));
269 } else if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END) {
270 int t, v;
271
272 if (!(tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN))
273 return -EINVAL;
274 if ((tinfo_curr->vid - tinfo_last->vid) !=
275 (tinfo_curr->tunid - tinfo_last->tunid))
276 return -EINVAL;
277 t = tinfo_last->tunid;
278 for (v = tinfo_last->vid; v <= tinfo_curr->vid; v++) {
279 err = br_vlan_tunnel_info(p, cmd, v, t, changed);
280 if (err)
281 return err;
282 t++;
283 }
284 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
285 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
286 } else {
287 if (tinfo_last->flags)
288 return -EINVAL;
289 err = br_vlan_tunnel_info(p, cmd, tinfo_curr->vid,
290 tinfo_curr->tunid, changed);
291 if (err)
292 return err;
293 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
294 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
295 }
296
297 return 0;
298}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Bridge per vlan tunnel port dst_metadata netlink control interface
4 *
5 * Authors:
6 * Roopa Prabhu <roopa@cumulusnetworks.com>
7 */
8
9#include <linux/kernel.h>
10#include <linux/slab.h>
11#include <linux/etherdevice.h>
12#include <net/rtnetlink.h>
13#include <net/net_namespace.h>
14#include <net/sock.h>
15#include <uapi/linux/if_bridge.h>
16#include <net/dst_metadata.h>
17
18#include "br_private.h"
19#include "br_private_tunnel.h"
20
21static size_t __get_vlan_tinfo_size(void)
22{
23 return nla_total_size(0) + /* nest IFLA_BRIDGE_VLAN_TUNNEL_INFO */
24 nla_total_size(sizeof(u32)) + /* IFLA_BRIDGE_VLAN_TUNNEL_ID */
25 nla_total_size(sizeof(u16)) + /* IFLA_BRIDGE_VLAN_TUNNEL_VID */
26 nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_VLAN_TUNNEL_FLAGS */
27}
28
29bool vlan_tunid_inrange(const struct net_bridge_vlan *v_curr,
30 const struct net_bridge_vlan *v_last)
31{
32 __be32 tunid_curr = tunnel_id_to_key32(v_curr->tinfo.tunnel_id);
33 __be32 tunid_last = tunnel_id_to_key32(v_last->tinfo.tunnel_id);
34
35 return (be32_to_cpu(tunid_curr) - be32_to_cpu(tunid_last)) == 1;
36}
37
38static int __get_num_vlan_tunnel_infos(struct net_bridge_vlan_group *vg)
39{
40 struct net_bridge_vlan *v, *vtbegin = NULL, *vtend = NULL;
41 int num_tinfos = 0;
42
43 /* Count number of vlan infos */
44 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
45 /* only a context, bridge vlan not activated */
46 if (!br_vlan_should_use(v) || !v->tinfo.tunnel_id)
47 continue;
48
49 if (!vtbegin) {
50 goto initvars;
51 } else if ((v->vid - vtend->vid) == 1 &&
52 vlan_tunid_inrange(v, vtend)) {
53 vtend = v;
54 continue;
55 } else {
56 if ((vtend->vid - vtbegin->vid) > 0)
57 num_tinfos += 2;
58 else
59 num_tinfos += 1;
60 }
61initvars:
62 vtbegin = v;
63 vtend = v;
64 }
65
66 if (vtbegin && vtend) {
67 if ((vtend->vid - vtbegin->vid) > 0)
68 num_tinfos += 2;
69 else
70 num_tinfos += 1;
71 }
72
73 return num_tinfos;
74}
75
76int br_get_vlan_tunnel_info_size(struct net_bridge_vlan_group *vg)
77{
78 int num_tinfos;
79
80 if (!vg)
81 return 0;
82
83 rcu_read_lock();
84 num_tinfos = __get_num_vlan_tunnel_infos(vg);
85 rcu_read_unlock();
86
87 return num_tinfos * __get_vlan_tinfo_size();
88}
89
90static int br_fill_vlan_tinfo(struct sk_buff *skb, u16 vid,
91 __be64 tunnel_id, u16 flags)
92{
93 __be32 tid = tunnel_id_to_key32(tunnel_id);
94 struct nlattr *tmap;
95
96 tmap = nla_nest_start_noflag(skb, IFLA_BRIDGE_VLAN_TUNNEL_INFO);
97 if (!tmap)
98 return -EMSGSIZE;
99 if (nla_put_u32(skb, IFLA_BRIDGE_VLAN_TUNNEL_ID,
100 be32_to_cpu(tid)))
101 goto nla_put_failure;
102 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_VID,
103 vid))
104 goto nla_put_failure;
105 if (nla_put_u16(skb, IFLA_BRIDGE_VLAN_TUNNEL_FLAGS,
106 flags))
107 goto nla_put_failure;
108 nla_nest_end(skb, tmap);
109
110 return 0;
111
112nla_put_failure:
113 nla_nest_cancel(skb, tmap);
114
115 return -EMSGSIZE;
116}
117
118static int br_fill_vlan_tinfo_range(struct sk_buff *skb,
119 struct net_bridge_vlan *vtbegin,
120 struct net_bridge_vlan *vtend)
121{
122 int err;
123
124 if (vtend && (vtend->vid - vtbegin->vid) > 0) {
125 /* add range to skb */
126 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
127 vtbegin->tinfo.tunnel_id,
128 BRIDGE_VLAN_INFO_RANGE_BEGIN);
129 if (err)
130 return err;
131
132 err = br_fill_vlan_tinfo(skb, vtend->vid,
133 vtend->tinfo.tunnel_id,
134 BRIDGE_VLAN_INFO_RANGE_END);
135 if (err)
136 return err;
137 } else {
138 err = br_fill_vlan_tinfo(skb, vtbegin->vid,
139 vtbegin->tinfo.tunnel_id,
140 0);
141 if (err)
142 return err;
143 }
144
145 return 0;
146}
147
148int br_fill_vlan_tunnel_info(struct sk_buff *skb,
149 struct net_bridge_vlan_group *vg)
150{
151 struct net_bridge_vlan *vtbegin = NULL;
152 struct net_bridge_vlan *vtend = NULL;
153 struct net_bridge_vlan *v;
154 int err;
155
156 /* Count number of vlan infos */
157 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
158 /* only a context, bridge vlan not activated */
159 if (!br_vlan_should_use(v))
160 continue;
161
162 if (!v->tinfo.tunnel_dst)
163 continue;
164
165 if (!vtbegin) {
166 goto initvars;
167 } else if ((v->vid - vtend->vid) == 1 &&
168 vlan_tunid_inrange(v, vtend)) {
169 vtend = v;
170 continue;
171 } else {
172 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
173 if (err)
174 return err;
175 }
176initvars:
177 vtbegin = v;
178 vtend = v;
179 }
180
181 if (vtbegin) {
182 err = br_fill_vlan_tinfo_range(skb, vtbegin, vtend);
183 if (err)
184 return err;
185 }
186
187 return 0;
188}
189
190static const struct nla_policy vlan_tunnel_policy[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1] = {
191 [IFLA_BRIDGE_VLAN_TUNNEL_ID] = { .type = NLA_U32 },
192 [IFLA_BRIDGE_VLAN_TUNNEL_VID] = { .type = NLA_U16 },
193 [IFLA_BRIDGE_VLAN_TUNNEL_FLAGS] = { .type = NLA_U16 },
194};
195
196int br_vlan_tunnel_info(const struct net_bridge_port *p, int cmd,
197 u16 vid, u32 tun_id, bool *changed)
198{
199 int err = 0;
200
201 if (!p)
202 return -EINVAL;
203
204 switch (cmd) {
205 case RTM_SETLINK:
206 err = nbp_vlan_tunnel_info_add(p, vid, tun_id);
207 if (!err)
208 *changed = true;
209 break;
210 case RTM_DELLINK:
211 if (!nbp_vlan_tunnel_info_delete(p, vid))
212 *changed = true;
213 break;
214 }
215
216 return err;
217}
218
219int br_parse_vlan_tunnel_info(struct nlattr *attr,
220 struct vtunnel_info *tinfo)
221{
222 struct nlattr *tb[IFLA_BRIDGE_VLAN_TUNNEL_MAX + 1];
223 u32 tun_id;
224 u16 vid, flags = 0;
225 int err;
226
227 memset(tinfo, 0, sizeof(*tinfo));
228
229 err = nla_parse_nested_deprecated(tb, IFLA_BRIDGE_VLAN_TUNNEL_MAX,
230 attr, vlan_tunnel_policy, NULL);
231 if (err < 0)
232 return err;
233
234 if (!tb[IFLA_BRIDGE_VLAN_TUNNEL_ID] ||
235 !tb[IFLA_BRIDGE_VLAN_TUNNEL_VID])
236 return -EINVAL;
237
238 tun_id = nla_get_u32(tb[IFLA_BRIDGE_VLAN_TUNNEL_ID]);
239 vid = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_VID]);
240 if (vid >= VLAN_VID_MASK)
241 return -ERANGE;
242
243 if (tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS])
244 flags = nla_get_u16(tb[IFLA_BRIDGE_VLAN_TUNNEL_FLAGS]);
245
246 tinfo->tunid = tun_id;
247 tinfo->vid = vid;
248 tinfo->flags = flags;
249
250 return 0;
251}
252
253/* send a notification if v_curr can't enter the range and start a new one */
254static void __vlan_tunnel_handle_range(const struct net_bridge_port *p,
255 struct net_bridge_vlan **v_start,
256 struct net_bridge_vlan **v_end,
257 int v_curr, bool curr_change)
258{
259 struct net_bridge_vlan_group *vg;
260 struct net_bridge_vlan *v;
261
262 vg = nbp_vlan_group(p);
263 if (!vg)
264 return;
265
266 v = br_vlan_find(vg, v_curr);
267
268 if (!*v_start)
269 goto out_init;
270
271 if (v && curr_change && br_vlan_can_enter_range(v, *v_end)) {
272 *v_end = v;
273 return;
274 }
275
276 br_vlan_notify(p->br, p, (*v_start)->vid, (*v_end)->vid, RTM_NEWVLAN);
277out_init:
278 /* we start a range only if there are any changes to notify about */
279 *v_start = curr_change ? v : NULL;
280 *v_end = *v_start;
281}
282
283int br_process_vlan_tunnel_info(const struct net_bridge *br,
284 const struct net_bridge_port *p, int cmd,
285 struct vtunnel_info *tinfo_curr,
286 struct vtunnel_info *tinfo_last,
287 bool *changed)
288{
289 int err;
290
291 if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
292 if (tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN)
293 return -EINVAL;
294 memcpy(tinfo_last, tinfo_curr, sizeof(struct vtunnel_info));
295 } else if (tinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END) {
296 struct net_bridge_vlan *v_start = NULL, *v_end = NULL;
297 int t, v;
298
299 if (!(tinfo_last->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN))
300 return -EINVAL;
301 if ((tinfo_curr->vid - tinfo_last->vid) !=
302 (tinfo_curr->tunid - tinfo_last->tunid))
303 return -EINVAL;
304 t = tinfo_last->tunid;
305 for (v = tinfo_last->vid; v <= tinfo_curr->vid; v++) {
306 bool curr_change = false;
307
308 err = br_vlan_tunnel_info(p, cmd, v, t, &curr_change);
309 if (err)
310 break;
311 t++;
312
313 if (curr_change)
314 *changed = curr_change;
315 __vlan_tunnel_handle_range(p, &v_start, &v_end, v,
316 curr_change);
317 }
318 if (v_start && v_end)
319 br_vlan_notify(br, p, v_start->vid, v_end->vid,
320 RTM_NEWVLAN);
321 if (err)
322 return err;
323
324 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
325 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
326 } else {
327 if (tinfo_last->flags)
328 return -EINVAL;
329 err = br_vlan_tunnel_info(p, cmd, tinfo_curr->vid,
330 tinfo_curr->tunid, changed);
331 if (err)
332 return err;
333 br_vlan_notify(br, p, tinfo_curr->vid, 0, RTM_NEWVLAN);
334 memset(tinfo_last, 0, sizeof(struct vtunnel_info));
335 memset(tinfo_curr, 0, sizeof(struct vtunnel_info));
336 }
337
338 return 0;
339}