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Merge remote-tracking branch 'sound-asoc/for-next'
[deliverable/linux.git] / net / bridge / br_netlink.c
1 /*
2 * Bridge netlink control interface
3 *
4 * Authors:
5 * Stephen Hemminger <shemminger@osdl.org>
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
21 #include "br_private.h"
22 #include "br_private_stp.h"
23
24 static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
25 u32 filter_mask)
26 {
27 struct net_bridge_vlan *v;
28 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
29 u16 flags, pvid;
30 int num_vlans = 0;
31
32 if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
33 return 0;
34
35 pvid = br_get_pvid(vg);
36 /* Count number of vlan infos */
37 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
38 flags = 0;
39 /* only a context, bridge vlan not activated */
40 if (!br_vlan_should_use(v))
41 continue;
42 if (v->vid == pvid)
43 flags |= BRIDGE_VLAN_INFO_PVID;
44
45 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
46 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
47
48 if (vid_range_start == 0) {
49 goto initvars;
50 } else if ((v->vid - vid_range_end) == 1 &&
51 flags == vid_range_flags) {
52 vid_range_end = v->vid;
53 continue;
54 } else {
55 if ((vid_range_end - vid_range_start) > 0)
56 num_vlans += 2;
57 else
58 num_vlans += 1;
59 }
60 initvars:
61 vid_range_start = v->vid;
62 vid_range_end = v->vid;
63 vid_range_flags = flags;
64 }
65
66 if (vid_range_start != 0) {
67 if ((vid_range_end - vid_range_start) > 0)
68 num_vlans += 2;
69 else
70 num_vlans += 1;
71 }
72
73 return num_vlans;
74 }
75
76 static int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
77 u32 filter_mask)
78 {
79 int num_vlans;
80
81 if (!vg)
82 return 0;
83
84 if (filter_mask & RTEXT_FILTER_BRVLAN)
85 return vg->num_vlans;
86
87 rcu_read_lock();
88 num_vlans = __get_num_vlan_infos(vg, filter_mask);
89 rcu_read_unlock();
90
91 return num_vlans;
92 }
93
94 static size_t br_get_link_af_size_filtered(const struct net_device *dev,
95 u32 filter_mask)
96 {
97 struct net_bridge_vlan_group *vg = NULL;
98 struct net_bridge_port *p;
99 struct net_bridge *br;
100 int num_vlan_infos;
101
102 rcu_read_lock();
103 if (br_port_exists(dev)) {
104 p = br_port_get_rcu(dev);
105 vg = nbp_vlan_group_rcu(p);
106 } else if (dev->priv_flags & IFF_EBRIDGE) {
107 br = netdev_priv(dev);
108 vg = br_vlan_group_rcu(br);
109 }
110 num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
111 rcu_read_unlock();
112
113 /* Each VLAN is returned in bridge_vlan_info along with flags */
114 return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
115 }
116
117 static inline size_t br_port_info_size(void)
118 {
119 return nla_total_size(1) /* IFLA_BRPORT_STATE */
120 + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
121 + nla_total_size(4) /* IFLA_BRPORT_COST */
122 + nla_total_size(1) /* IFLA_BRPORT_MODE */
123 + nla_total_size(1) /* IFLA_BRPORT_GUARD */
124 + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
125 + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
126 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
127 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
128 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
130 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
131 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
132 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
133 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
134 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
135 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
136 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
137 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
138 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
139 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
140 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
141 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
142 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
143 #endif
144 + 0;
145 }
146
147 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
148 {
149 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
150 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
151 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
152 + nla_total_size(4) /* IFLA_MASTER */
153 + nla_total_size(4) /* IFLA_MTU */
154 + nla_total_size(4) /* IFLA_LINK */
155 + nla_total_size(1) /* IFLA_OPERSTATE */
156 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
157 + nla_total_size(br_get_link_af_size_filtered(dev,
158 filter_mask)); /* IFLA_AF_SPEC */
159 }
160
161 static int br_port_fill_attrs(struct sk_buff *skb,
162 const struct net_bridge_port *p)
163 {
164 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
165 u64 timerval;
166
167 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
168 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
169 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
170 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
171 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
172 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
173 !!(p->flags & BR_ROOT_BLOCK)) ||
174 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
175 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
176 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
177 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
178 !!(p->flags & BR_FLOOD)) ||
179 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
180 !!(p->flags & BR_MCAST_FLOOD)) ||
181 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
182 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
183 !!(p->flags & BR_PROXYARP_WIFI)) ||
184 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
185 &p->designated_root) ||
186 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
187 &p->designated_bridge) ||
188 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
189 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
190 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
191 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
192 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
193 p->topology_change_ack) ||
194 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
195 return -EMSGSIZE;
196
197 timerval = br_timer_value(&p->message_age_timer);
198 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
199 IFLA_BRPORT_PAD))
200 return -EMSGSIZE;
201 timerval = br_timer_value(&p->forward_delay_timer);
202 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
203 IFLA_BRPORT_PAD))
204 return -EMSGSIZE;
205 timerval = br_timer_value(&p->hold_timer);
206 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
207 IFLA_BRPORT_PAD))
208 return -EMSGSIZE;
209
210 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
211 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
212 p->multicast_router))
213 return -EMSGSIZE;
214 #endif
215
216 return 0;
217 }
218
219 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
220 u16 vid_end, u16 flags)
221 {
222 struct bridge_vlan_info vinfo;
223
224 if ((vid_end - vid_start) > 0) {
225 /* add range to skb */
226 vinfo.vid = vid_start;
227 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
228 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
229 sizeof(vinfo), &vinfo))
230 goto nla_put_failure;
231
232 vinfo.vid = vid_end;
233 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
234 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
235 sizeof(vinfo), &vinfo))
236 goto nla_put_failure;
237 } else {
238 vinfo.vid = vid_start;
239 vinfo.flags = flags;
240 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
241 sizeof(vinfo), &vinfo))
242 goto nla_put_failure;
243 }
244
245 return 0;
246
247 nla_put_failure:
248 return -EMSGSIZE;
249 }
250
251 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
252 struct net_bridge_vlan_group *vg)
253 {
254 struct net_bridge_vlan *v;
255 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
256 u16 flags, pvid;
257 int err = 0;
258
259 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
260 * and mark vlan info with begin and end flags
261 * if vlaninfo represents a range
262 */
263 pvid = br_get_pvid(vg);
264 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
265 flags = 0;
266 if (!br_vlan_should_use(v))
267 continue;
268 if (v->vid == pvid)
269 flags |= BRIDGE_VLAN_INFO_PVID;
270
271 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
272 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
273
274 if (vid_range_start == 0) {
275 goto initvars;
276 } else if ((v->vid - vid_range_end) == 1 &&
277 flags == vid_range_flags) {
278 vid_range_end = v->vid;
279 continue;
280 } else {
281 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
282 vid_range_end,
283 vid_range_flags);
284 if (err)
285 return err;
286 }
287
288 initvars:
289 vid_range_start = v->vid;
290 vid_range_end = v->vid;
291 vid_range_flags = flags;
292 }
293
294 if (vid_range_start != 0) {
295 /* Call it once more to send any left over vlans */
296 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
297 vid_range_end,
298 vid_range_flags);
299 if (err)
300 return err;
301 }
302
303 return 0;
304 }
305
306 static int br_fill_ifvlaninfo(struct sk_buff *skb,
307 struct net_bridge_vlan_group *vg)
308 {
309 struct bridge_vlan_info vinfo;
310 struct net_bridge_vlan *v;
311 u16 pvid;
312
313 pvid = br_get_pvid(vg);
314 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
315 if (!br_vlan_should_use(v))
316 continue;
317
318 vinfo.vid = v->vid;
319 vinfo.flags = 0;
320 if (v->vid == pvid)
321 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
322
323 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
324 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
325
326 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
327 sizeof(vinfo), &vinfo))
328 goto nla_put_failure;
329 }
330
331 return 0;
332
333 nla_put_failure:
334 return -EMSGSIZE;
335 }
336
337 /*
338 * Create one netlink message for one interface
339 * Contains port and master info as well as carrier and bridge state.
340 */
341 static int br_fill_ifinfo(struct sk_buff *skb,
342 struct net_bridge_port *port,
343 u32 pid, u32 seq, int event, unsigned int flags,
344 u32 filter_mask, const struct net_device *dev)
345 {
346 struct net_bridge *br;
347 struct ifinfomsg *hdr;
348 struct nlmsghdr *nlh;
349 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
350
351 if (port)
352 br = port->br;
353 else
354 br = netdev_priv(dev);
355
356 br_debug(br, "br_fill_info event %d port %s master %s\n",
357 event, dev->name, br->dev->name);
358
359 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
360 if (nlh == NULL)
361 return -EMSGSIZE;
362
363 hdr = nlmsg_data(nlh);
364 hdr->ifi_family = AF_BRIDGE;
365 hdr->__ifi_pad = 0;
366 hdr->ifi_type = dev->type;
367 hdr->ifi_index = dev->ifindex;
368 hdr->ifi_flags = dev_get_flags(dev);
369 hdr->ifi_change = 0;
370
371 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
372 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
373 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
374 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
375 (dev->addr_len &&
376 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
377 (dev->ifindex != dev_get_iflink(dev) &&
378 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
379 goto nla_put_failure;
380
381 if (event == RTM_NEWLINK && port) {
382 struct nlattr *nest
383 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
384
385 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
386 goto nla_put_failure;
387 nla_nest_end(skb, nest);
388 }
389
390 /* Check if the VID information is requested */
391 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
392 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
393 struct net_bridge_vlan_group *vg;
394 struct nlattr *af;
395 int err;
396
397 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
398 rcu_read_lock();
399 if (port)
400 vg = nbp_vlan_group_rcu(port);
401 else
402 vg = br_vlan_group_rcu(br);
403
404 if (!vg || !vg->num_vlans) {
405 rcu_read_unlock();
406 goto done;
407 }
408 af = nla_nest_start(skb, IFLA_AF_SPEC);
409 if (!af) {
410 rcu_read_unlock();
411 goto nla_put_failure;
412 }
413 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
414 err = br_fill_ifvlaninfo_compressed(skb, vg);
415 else
416 err = br_fill_ifvlaninfo(skb, vg);
417 rcu_read_unlock();
418 if (err)
419 goto nla_put_failure;
420 nla_nest_end(skb, af);
421 }
422
423 done:
424 nlmsg_end(skb, nlh);
425 return 0;
426
427 nla_put_failure:
428 nlmsg_cancel(skb, nlh);
429 return -EMSGSIZE;
430 }
431
432 /*
433 * Notify listeners of a change in port information
434 */
435 void br_ifinfo_notify(int event, struct net_bridge_port *port)
436 {
437 struct net *net;
438 struct sk_buff *skb;
439 int err = -ENOBUFS;
440 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
441
442 if (!port)
443 return;
444
445 net = dev_net(port->dev);
446 br_debug(port->br, "port %u(%s) event %d\n",
447 (unsigned int)port->port_no, port->dev->name, event);
448
449 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
450 if (skb == NULL)
451 goto errout;
452
453 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
454 if (err < 0) {
455 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
456 WARN_ON(err == -EMSGSIZE);
457 kfree_skb(skb);
458 goto errout;
459 }
460 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
461 return;
462 errout:
463 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
464 }
465
466
467 /*
468 * Dump information about all ports, in response to GETLINK
469 */
470 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
471 struct net_device *dev, u32 filter_mask, int nlflags)
472 {
473 struct net_bridge_port *port = br_port_get_rtnl(dev);
474
475 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
476 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
477 return 0;
478
479 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
480 filter_mask, dev);
481 }
482
483 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
484 int cmd, struct bridge_vlan_info *vinfo)
485 {
486 int err = 0;
487
488 switch (cmd) {
489 case RTM_SETLINK:
490 if (p) {
491 /* if the MASTER flag is set this will act on the global
492 * per-VLAN entry as well
493 */
494 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
495 if (err)
496 break;
497 } else {
498 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
499 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
500 }
501 break;
502
503 case RTM_DELLINK:
504 if (p) {
505 nbp_vlan_delete(p, vinfo->vid);
506 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
507 br_vlan_delete(p->br, vinfo->vid);
508 } else {
509 br_vlan_delete(br, vinfo->vid);
510 }
511 break;
512 }
513
514 return err;
515 }
516
517 static int br_afspec(struct net_bridge *br,
518 struct net_bridge_port *p,
519 struct nlattr *af_spec,
520 int cmd)
521 {
522 struct bridge_vlan_info *vinfo_start = NULL;
523 struct bridge_vlan_info *vinfo = NULL;
524 struct nlattr *attr;
525 int err = 0;
526 int rem;
527
528 nla_for_each_nested(attr, af_spec, rem) {
529 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
530 continue;
531 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
532 return -EINVAL;
533 vinfo = nla_data(attr);
534 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
535 return -EINVAL;
536 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
537 if (vinfo_start)
538 return -EINVAL;
539 vinfo_start = vinfo;
540 /* don't allow range of pvids */
541 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
542 return -EINVAL;
543 continue;
544 }
545
546 if (vinfo_start) {
547 struct bridge_vlan_info tmp_vinfo;
548 int v;
549
550 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
551 return -EINVAL;
552
553 if (vinfo->vid <= vinfo_start->vid)
554 return -EINVAL;
555
556 memcpy(&tmp_vinfo, vinfo_start,
557 sizeof(struct bridge_vlan_info));
558
559 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
560 tmp_vinfo.vid = v;
561 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
562 if (err)
563 break;
564 }
565 vinfo_start = NULL;
566 } else {
567 err = br_vlan_info(br, p, cmd, vinfo);
568 }
569 if (err)
570 break;
571 }
572
573 return err;
574 }
575
576 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
577 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
578 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
579 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
580 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
581 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
582 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
583 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
584 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
585 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
586 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
587 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
588 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
589 };
590
591 /* Change the state of the port and notify spanning tree */
592 static int br_set_port_state(struct net_bridge_port *p, u8 state)
593 {
594 if (state > BR_STATE_BLOCKING)
595 return -EINVAL;
596
597 /* if kernel STP is running, don't allow changes */
598 if (p->br->stp_enabled == BR_KERNEL_STP)
599 return -EBUSY;
600
601 /* if device is not up, change is not allowed
602 * if link is not present, only allowable state is disabled
603 */
604 if (!netif_running(p->dev) ||
605 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
606 return -ENETDOWN;
607
608 br_set_state(p, state);
609 br_port_state_selection(p->br);
610 return 0;
611 }
612
613 /* Set/clear or port flags based on attribute */
614 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
615 int attrtype, unsigned long mask)
616 {
617 if (tb[attrtype]) {
618 u8 flag = nla_get_u8(tb[attrtype]);
619 if (flag)
620 p->flags |= mask;
621 else
622 p->flags &= ~mask;
623 }
624 }
625
626 /* Process bridge protocol info on port */
627 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
628 {
629 int err;
630 unsigned long old_flags = p->flags;
631
632 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
633 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
634 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
635 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
636 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
637 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
638 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
639 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
640 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
641
642 if (tb[IFLA_BRPORT_COST]) {
643 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
644 if (err)
645 return err;
646 }
647
648 if (tb[IFLA_BRPORT_PRIORITY]) {
649 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
650 if (err)
651 return err;
652 }
653
654 if (tb[IFLA_BRPORT_STATE]) {
655 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
656 if (err)
657 return err;
658 }
659
660 if (tb[IFLA_BRPORT_FLUSH])
661 br_fdb_delete_by_port(p->br, p, 0, 0);
662
663 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
664 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
665 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
666
667 err = br_multicast_set_port_router(p, mcast_router);
668 if (err)
669 return err;
670 }
671 #endif
672 br_port_flags_change(p, old_flags ^ p->flags);
673 return 0;
674 }
675
676 /* Change state and parameters on port. */
677 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
678 {
679 struct nlattr *protinfo;
680 struct nlattr *afspec;
681 struct net_bridge_port *p;
682 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
683 int err = 0;
684
685 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
686 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
687 if (!protinfo && !afspec)
688 return 0;
689
690 p = br_port_get_rtnl(dev);
691 /* We want to accept dev as bridge itself if the AF_SPEC
692 * is set to see if someone is setting vlan info on the bridge
693 */
694 if (!p && !afspec)
695 return -EINVAL;
696
697 if (p && protinfo) {
698 if (protinfo->nla_type & NLA_F_NESTED) {
699 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
700 protinfo, br_port_policy);
701 if (err)
702 return err;
703
704 spin_lock_bh(&p->br->lock);
705 err = br_setport(p, tb);
706 spin_unlock_bh(&p->br->lock);
707 } else {
708 /* Binary compatibility with old RSTP */
709 if (nla_len(protinfo) < sizeof(u8))
710 return -EINVAL;
711
712 spin_lock_bh(&p->br->lock);
713 err = br_set_port_state(p, nla_get_u8(protinfo));
714 spin_unlock_bh(&p->br->lock);
715 }
716 if (err)
717 goto out;
718 }
719
720 if (afspec) {
721 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
722 afspec, RTM_SETLINK);
723 }
724
725 if (err == 0)
726 br_ifinfo_notify(RTM_NEWLINK, p);
727 out:
728 return err;
729 }
730
731 /* Delete port information */
732 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
733 {
734 struct nlattr *afspec;
735 struct net_bridge_port *p;
736 int err = 0;
737
738 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
739 if (!afspec)
740 return 0;
741
742 p = br_port_get_rtnl(dev);
743 /* We want to accept dev as bridge itself as well */
744 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
745 return -EINVAL;
746
747 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
748 afspec, RTM_DELLINK);
749 if (err == 0)
750 /* Send RTM_NEWLINK because userspace
751 * expects RTM_NEWLINK for vlan dels
752 */
753 br_ifinfo_notify(RTM_NEWLINK, p);
754
755 return err;
756 }
757 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
758 {
759 if (tb[IFLA_ADDRESS]) {
760 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
761 return -EINVAL;
762 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
763 return -EADDRNOTAVAIL;
764 }
765
766 if (!data)
767 return 0;
768
769 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
770 if (data[IFLA_BR_VLAN_PROTOCOL]) {
771 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
772 case htons(ETH_P_8021Q):
773 case htons(ETH_P_8021AD):
774 break;
775 default:
776 return -EPROTONOSUPPORT;
777 }
778 }
779 #endif
780
781 return 0;
782 }
783
784 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
785 struct nlattr *tb[], struct nlattr *data[])
786 {
787 struct net_bridge *br = netdev_priv(dev);
788
789 if (tb[IFLA_ADDRESS]) {
790 spin_lock_bh(&br->lock);
791 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
792 spin_unlock_bh(&br->lock);
793 }
794
795 return register_netdevice(dev);
796 }
797
798 static int br_port_slave_changelink(struct net_device *brdev,
799 struct net_device *dev,
800 struct nlattr *tb[],
801 struct nlattr *data[])
802 {
803 struct net_bridge *br = netdev_priv(brdev);
804 int ret;
805
806 if (!data)
807 return 0;
808
809 spin_lock_bh(&br->lock);
810 ret = br_setport(br_port_get_rtnl(dev), data);
811 spin_unlock_bh(&br->lock);
812
813 return ret;
814 }
815
816 static int br_port_fill_slave_info(struct sk_buff *skb,
817 const struct net_device *brdev,
818 const struct net_device *dev)
819 {
820 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
821 }
822
823 static size_t br_port_get_slave_size(const struct net_device *brdev,
824 const struct net_device *dev)
825 {
826 return br_port_info_size();
827 }
828
829 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
830 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
831 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
832 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
833 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
834 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
835 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
836 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
837 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
838 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
839 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
840 .len = ETH_ALEN },
841 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
842 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
843 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
844 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
845 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
846 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
847 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
848 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
849 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
850 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
851 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
852 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
853 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
854 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
855 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
856 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
857 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
858 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
859 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
860 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
861 };
862
863 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
864 struct nlattr *data[])
865 {
866 struct net_bridge *br = netdev_priv(brdev);
867 int err;
868
869 if (!data)
870 return 0;
871
872 if (data[IFLA_BR_FORWARD_DELAY]) {
873 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
874 if (err)
875 return err;
876 }
877
878 if (data[IFLA_BR_HELLO_TIME]) {
879 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
880 if (err)
881 return err;
882 }
883
884 if (data[IFLA_BR_MAX_AGE]) {
885 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
886 if (err)
887 return err;
888 }
889
890 if (data[IFLA_BR_AGEING_TIME]) {
891 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
892 if (err)
893 return err;
894 }
895
896 if (data[IFLA_BR_STP_STATE]) {
897 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
898
899 br_stp_set_enabled(br, stp_enabled);
900 }
901
902 if (data[IFLA_BR_PRIORITY]) {
903 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
904
905 br_stp_set_bridge_priority(br, priority);
906 }
907
908 if (data[IFLA_BR_VLAN_FILTERING]) {
909 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
910
911 err = __br_vlan_filter_toggle(br, vlan_filter);
912 if (err)
913 return err;
914 }
915
916 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
917 if (data[IFLA_BR_VLAN_PROTOCOL]) {
918 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
919
920 err = __br_vlan_set_proto(br, vlan_proto);
921 if (err)
922 return err;
923 }
924
925 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
926 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
927
928 err = __br_vlan_set_default_pvid(br, defpvid);
929 if (err)
930 return err;
931 }
932
933 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
934 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
935
936 err = br_vlan_set_stats(br, vlan_stats);
937 if (err)
938 return err;
939 }
940 #endif
941
942 if (data[IFLA_BR_GROUP_FWD_MASK]) {
943 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
944
945 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
946 return -EINVAL;
947 br->group_fwd_mask = fwd_mask;
948 }
949
950 if (data[IFLA_BR_GROUP_ADDR]) {
951 u8 new_addr[ETH_ALEN];
952
953 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
954 return -EINVAL;
955 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
956 if (!is_link_local_ether_addr(new_addr))
957 return -EINVAL;
958 if (new_addr[5] == 1 || /* 802.3x Pause address */
959 new_addr[5] == 2 || /* 802.3ad Slow protocols */
960 new_addr[5] == 3) /* 802.1X PAE address */
961 return -EINVAL;
962 spin_lock_bh(&br->lock);
963 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
964 spin_unlock_bh(&br->lock);
965 br->group_addr_set = true;
966 br_recalculate_fwd_mask(br);
967 }
968
969 if (data[IFLA_BR_FDB_FLUSH])
970 br_fdb_flush(br);
971
972 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
973 if (data[IFLA_BR_MCAST_ROUTER]) {
974 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
975
976 err = br_multicast_set_router(br, multicast_router);
977 if (err)
978 return err;
979 }
980
981 if (data[IFLA_BR_MCAST_SNOOPING]) {
982 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
983
984 err = br_multicast_toggle(br, mcast_snooping);
985 if (err)
986 return err;
987 }
988
989 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
990 u8 val;
991
992 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
993 br->multicast_query_use_ifaddr = !!val;
994 }
995
996 if (data[IFLA_BR_MCAST_QUERIER]) {
997 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
998
999 err = br_multicast_set_querier(br, mcast_querier);
1000 if (err)
1001 return err;
1002 }
1003
1004 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
1005 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
1006
1007 br->hash_elasticity = val;
1008 }
1009
1010 if (data[IFLA_BR_MCAST_HASH_MAX]) {
1011 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1012
1013 err = br_multicast_set_hash_max(br, hash_max);
1014 if (err)
1015 return err;
1016 }
1017
1018 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1019 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1020
1021 br->multicast_last_member_count = val;
1022 }
1023
1024 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1025 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1026
1027 br->multicast_startup_query_count = val;
1028 }
1029
1030 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1031 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1032
1033 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1034 }
1035
1036 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1037 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1038
1039 br->multicast_membership_interval = clock_t_to_jiffies(val);
1040 }
1041
1042 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1043 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1044
1045 br->multicast_querier_interval = clock_t_to_jiffies(val);
1046 }
1047
1048 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1049 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1050
1051 br->multicast_query_interval = clock_t_to_jiffies(val);
1052 }
1053
1054 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1055 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1056
1057 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1058 }
1059
1060 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1061 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1062
1063 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1064 }
1065
1066 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1067 __u8 mcast_stats;
1068
1069 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1070 br->multicast_stats_enabled = !!mcast_stats;
1071 }
1072 #endif
1073 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1074 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1075 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1076
1077 br->nf_call_iptables = val ? true : false;
1078 }
1079
1080 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1081 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1082
1083 br->nf_call_ip6tables = val ? true : false;
1084 }
1085
1086 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1087 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1088
1089 br->nf_call_arptables = val ? true : false;
1090 }
1091 #endif
1092
1093 return 0;
1094 }
1095
1096 static size_t br_get_size(const struct net_device *brdev)
1097 {
1098 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1099 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1100 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1101 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1102 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1103 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1104 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1105 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1106 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1107 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1108 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1109 #endif
1110 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1111 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1112 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1113 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1114 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1115 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1116 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1117 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1118 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1119 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1120 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1121 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1122 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1123 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1124 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1125 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1126 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1127 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1128 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1129 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1130 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1131 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1132 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1133 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1134 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1135 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1136 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1137 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1138 #endif
1139 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1140 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1141 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1142 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1143 #endif
1144 0;
1145 }
1146
1147 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1148 {
1149 struct net_bridge *br = netdev_priv(brdev);
1150 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1151 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1152 u32 age_time = jiffies_to_clock_t(br->max_age);
1153 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1154 u32 stp_enabled = br->stp_enabled;
1155 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1156 u8 vlan_enabled = br_vlan_enabled(br);
1157 u64 clockval;
1158
1159 clockval = br_timer_value(&br->hello_timer);
1160 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1161 return -EMSGSIZE;
1162 clockval = br_timer_value(&br->tcn_timer);
1163 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1164 return -EMSGSIZE;
1165 clockval = br_timer_value(&br->topology_change_timer);
1166 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1167 IFLA_BR_PAD))
1168 return -EMSGSIZE;
1169 clockval = br_timer_value(&br->gc_timer);
1170 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1171 return -EMSGSIZE;
1172
1173 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1174 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1175 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1176 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1177 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1178 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1179 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1180 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1181 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1182 &br->bridge_id) ||
1183 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1184 &br->designated_root) ||
1185 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1186 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1187 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1188 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1189 br->topology_change_detected) ||
1190 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1191 return -EMSGSIZE;
1192
1193 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1194 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1195 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1196 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1197 return -EMSGSIZE;
1198 #endif
1199 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1200 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1201 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1202 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1203 br->multicast_query_use_ifaddr) ||
1204 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1205 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1206 br->multicast_stats_enabled) ||
1207 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1208 br->hash_elasticity) ||
1209 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1210 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1211 br->multicast_last_member_count) ||
1212 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1213 br->multicast_startup_query_count))
1214 return -EMSGSIZE;
1215
1216 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1217 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1218 IFLA_BR_PAD))
1219 return -EMSGSIZE;
1220 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1221 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1222 IFLA_BR_PAD))
1223 return -EMSGSIZE;
1224 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1225 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1226 IFLA_BR_PAD))
1227 return -EMSGSIZE;
1228 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1229 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1230 IFLA_BR_PAD))
1231 return -EMSGSIZE;
1232 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1233 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1234 IFLA_BR_PAD))
1235 return -EMSGSIZE;
1236 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1237 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1238 IFLA_BR_PAD))
1239 return -EMSGSIZE;
1240 #endif
1241 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1242 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1243 br->nf_call_iptables ? 1 : 0) ||
1244 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1245 br->nf_call_ip6tables ? 1 : 0) ||
1246 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1247 br->nf_call_arptables ? 1 : 0))
1248 return -EMSGSIZE;
1249 #endif
1250
1251 return 0;
1252 }
1253
1254 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1255 {
1256 struct net_bridge_port *p = NULL;
1257 struct net_bridge_vlan_group *vg;
1258 struct net_bridge_vlan *v;
1259 struct net_bridge *br;
1260 int numvls = 0;
1261
1262 switch (attr) {
1263 case IFLA_STATS_LINK_XSTATS:
1264 br = netdev_priv(dev);
1265 vg = br_vlan_group(br);
1266 break;
1267 case IFLA_STATS_LINK_XSTATS_SLAVE:
1268 p = br_port_get_rtnl(dev);
1269 if (!p)
1270 return 0;
1271 br = p->br;
1272 vg = nbp_vlan_group(p);
1273 break;
1274 default:
1275 return 0;
1276 }
1277
1278 if (vg) {
1279 /* we need to count all, even placeholder entries */
1280 list_for_each_entry(v, &vg->vlan_list, vlist)
1281 numvls++;
1282 }
1283
1284 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1285 nla_total_size(sizeof(struct br_mcast_stats)) +
1286 nla_total_size(0);
1287 }
1288
1289 static int br_fill_linkxstats(struct sk_buff *skb,
1290 const struct net_device *dev,
1291 int *prividx, int attr)
1292 {
1293 struct nlattr *nla __maybe_unused;
1294 struct net_bridge_port *p = NULL;
1295 struct net_bridge_vlan_group *vg;
1296 struct net_bridge_vlan *v;
1297 struct net_bridge *br;
1298 struct nlattr *nest;
1299 int vl_idx = 0;
1300
1301 switch (attr) {
1302 case IFLA_STATS_LINK_XSTATS:
1303 br = netdev_priv(dev);
1304 vg = br_vlan_group(br);
1305 break;
1306 case IFLA_STATS_LINK_XSTATS_SLAVE:
1307 p = br_port_get_rtnl(dev);
1308 if (!p)
1309 return 0;
1310 br = p->br;
1311 vg = nbp_vlan_group(p);
1312 break;
1313 default:
1314 return -EINVAL;
1315 }
1316
1317 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1318 if (!nest)
1319 return -EMSGSIZE;
1320
1321 if (vg) {
1322 u16 pvid;
1323
1324 pvid = br_get_pvid(vg);
1325 list_for_each_entry(v, &vg->vlan_list, vlist) {
1326 struct bridge_vlan_xstats vxi;
1327 struct br_vlan_stats stats;
1328
1329 if (++vl_idx < *prividx)
1330 continue;
1331 memset(&vxi, 0, sizeof(vxi));
1332 vxi.vid = v->vid;
1333 vxi.flags = v->flags;
1334 if (v->vid == pvid)
1335 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1336 br_vlan_get_stats(v, &stats);
1337 vxi.rx_bytes = stats.rx_bytes;
1338 vxi.rx_packets = stats.rx_packets;
1339 vxi.tx_bytes = stats.tx_bytes;
1340 vxi.tx_packets = stats.tx_packets;
1341
1342 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1343 goto nla_put_failure;
1344 }
1345 }
1346
1347 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1348 if (++vl_idx >= *prividx) {
1349 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1350 sizeof(struct br_mcast_stats),
1351 BRIDGE_XSTATS_PAD);
1352 if (!nla)
1353 goto nla_put_failure;
1354 br_multicast_get_stats(br, p, nla_data(nla));
1355 }
1356 #endif
1357 nla_nest_end(skb, nest);
1358 *prividx = 0;
1359
1360 return 0;
1361
1362 nla_put_failure:
1363 nla_nest_end(skb, nest);
1364 *prividx = vl_idx;
1365
1366 return -EMSGSIZE;
1367 }
1368
1369 static struct rtnl_af_ops br_af_ops __read_mostly = {
1370 .family = AF_BRIDGE,
1371 .get_link_af_size = br_get_link_af_size_filtered,
1372 };
1373
1374 struct rtnl_link_ops br_link_ops __read_mostly = {
1375 .kind = "bridge",
1376 .priv_size = sizeof(struct net_bridge),
1377 .setup = br_dev_setup,
1378 .maxtype = IFLA_BR_MAX,
1379 .policy = br_policy,
1380 .validate = br_validate,
1381 .newlink = br_dev_newlink,
1382 .changelink = br_changelink,
1383 .dellink = br_dev_delete,
1384 .get_size = br_get_size,
1385 .fill_info = br_fill_info,
1386 .fill_linkxstats = br_fill_linkxstats,
1387 .get_linkxstats_size = br_get_linkxstats_size,
1388
1389 .slave_maxtype = IFLA_BRPORT_MAX,
1390 .slave_policy = br_port_policy,
1391 .slave_changelink = br_port_slave_changelink,
1392 .get_slave_size = br_port_get_slave_size,
1393 .fill_slave_info = br_port_fill_slave_info,
1394 };
1395
1396 int __init br_netlink_init(void)
1397 {
1398 int err;
1399
1400 br_mdb_init();
1401 rtnl_af_register(&br_af_ops);
1402
1403 err = rtnl_link_register(&br_link_ops);
1404 if (err)
1405 goto out_af;
1406
1407 return 0;
1408
1409 out_af:
1410 rtnl_af_unregister(&br_af_ops);
1411 br_mdb_uninit();
1412 return err;
1413 }
1414
1415 void br_netlink_fini(void)
1416 {
1417 br_mdb_uninit();
1418 rtnl_af_unregister(&br_af_ops);
1419 rtnl_link_unregister(&br_link_ops);
1420 }
Linux kernel - Deliverables
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