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[mirror_ubuntu-zesty-kernel.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_port_slave_changelink(struct net_device *brdev,
785 struct net_device *dev,
786 struct nlattr *tb[],
787 struct nlattr *data[])
788 {
789 struct net_bridge *br = netdev_priv(brdev);
790 int ret;
791
792 if (!data)
793 return 0;
794
795 spin_lock_bh(&br->lock);
796 ret = br_setport(br_port_get_rtnl(dev), data);
797 spin_unlock_bh(&br->lock);
798
799 return ret;
800 }
801
802 static int br_port_fill_slave_info(struct sk_buff *skb,
803 const struct net_device *brdev,
804 const struct net_device *dev)
805 {
806 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
807 }
808
809 static size_t br_port_get_slave_size(const struct net_device *brdev,
810 const struct net_device *dev)
811 {
812 return br_port_info_size();
813 }
814
815 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
816 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
817 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
818 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
819 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
820 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
821 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
822 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
823 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
824 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
825 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
826 .len = ETH_ALEN },
827 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
828 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
829 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
830 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
831 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
832 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
833 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
834 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
835 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
836 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
837 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
838 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
839 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
840 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
841 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
842 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
843 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
844 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
845 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
846 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
847 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
848 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
849 };
850
851 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
852 struct nlattr *data[])
853 {
854 struct net_bridge *br = netdev_priv(brdev);
855 int err;
856
857 if (!data)
858 return 0;
859
860 if (data[IFLA_BR_FORWARD_DELAY]) {
861 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
862 if (err)
863 return err;
864 }
865
866 if (data[IFLA_BR_HELLO_TIME]) {
867 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
868 if (err)
869 return err;
870 }
871
872 if (data[IFLA_BR_MAX_AGE]) {
873 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
874 if (err)
875 return err;
876 }
877
878 if (data[IFLA_BR_AGEING_TIME]) {
879 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
880 if (err)
881 return err;
882 }
883
884 if (data[IFLA_BR_STP_STATE]) {
885 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
886
887 br_stp_set_enabled(br, stp_enabled);
888 }
889
890 if (data[IFLA_BR_PRIORITY]) {
891 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
892
893 br_stp_set_bridge_priority(br, priority);
894 }
895
896 if (data[IFLA_BR_VLAN_FILTERING]) {
897 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
898
899 err = __br_vlan_filter_toggle(br, vlan_filter);
900 if (err)
901 return err;
902 }
903
904 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
905 if (data[IFLA_BR_VLAN_PROTOCOL]) {
906 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
907
908 err = __br_vlan_set_proto(br, vlan_proto);
909 if (err)
910 return err;
911 }
912
913 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
914 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
915
916 err = __br_vlan_set_default_pvid(br, defpvid);
917 if (err)
918 return err;
919 }
920
921 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
922 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
923
924 err = br_vlan_set_stats(br, vlan_stats);
925 if (err)
926 return err;
927 }
928 #endif
929
930 if (data[IFLA_BR_GROUP_FWD_MASK]) {
931 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
932
933 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
934 return -EINVAL;
935 br->group_fwd_mask = fwd_mask;
936 }
937
938 if (data[IFLA_BR_GROUP_ADDR]) {
939 u8 new_addr[ETH_ALEN];
940
941 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
942 return -EINVAL;
943 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
944 if (!is_link_local_ether_addr(new_addr))
945 return -EINVAL;
946 if (new_addr[5] == 1 || /* 802.3x Pause address */
947 new_addr[5] == 2 || /* 802.3ad Slow protocols */
948 new_addr[5] == 3) /* 802.1X PAE address */
949 return -EINVAL;
950 spin_lock_bh(&br->lock);
951 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
952 spin_unlock_bh(&br->lock);
953 br->group_addr_set = true;
954 br_recalculate_fwd_mask(br);
955 }
956
957 if (data[IFLA_BR_FDB_FLUSH])
958 br_fdb_flush(br);
959
960 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
961 if (data[IFLA_BR_MCAST_ROUTER]) {
962 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
963
964 err = br_multicast_set_router(br, multicast_router);
965 if (err)
966 return err;
967 }
968
969 if (data[IFLA_BR_MCAST_SNOOPING]) {
970 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
971
972 err = br_multicast_toggle(br, mcast_snooping);
973 if (err)
974 return err;
975 }
976
977 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
978 u8 val;
979
980 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
981 br->multicast_query_use_ifaddr = !!val;
982 }
983
984 if (data[IFLA_BR_MCAST_QUERIER]) {
985 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
986
987 err = br_multicast_set_querier(br, mcast_querier);
988 if (err)
989 return err;
990 }
991
992 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
993 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
994
995 br->hash_elasticity = val;
996 }
997
998 if (data[IFLA_BR_MCAST_HASH_MAX]) {
999 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1000
1001 err = br_multicast_set_hash_max(br, hash_max);
1002 if (err)
1003 return err;
1004 }
1005
1006 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1007 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1008
1009 br->multicast_last_member_count = val;
1010 }
1011
1012 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1013 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1014
1015 br->multicast_startup_query_count = val;
1016 }
1017
1018 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1019 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1020
1021 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1022 }
1023
1024 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1025 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1026
1027 br->multicast_membership_interval = clock_t_to_jiffies(val);
1028 }
1029
1030 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1031 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1032
1033 br->multicast_querier_interval = clock_t_to_jiffies(val);
1034 }
1035
1036 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1037 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1038
1039 br->multicast_query_interval = clock_t_to_jiffies(val);
1040 }
1041
1042 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1043 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1044
1045 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1046 }
1047
1048 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1049 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1050
1051 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1052 }
1053
1054 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1055 __u8 mcast_stats;
1056
1057 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1058 br->multicast_stats_enabled = !!mcast_stats;
1059 }
1060
1061 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1062 __u8 igmp_version;
1063
1064 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1065 err = br_multicast_set_igmp_version(br, igmp_version);
1066 if (err)
1067 return err;
1068 }
1069
1070 #if IS_ENABLED(CONFIG_IPV6)
1071 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1072 __u8 mld_version;
1073
1074 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1075 err = br_multicast_set_mld_version(br, mld_version);
1076 if (err)
1077 return err;
1078 }
1079 #endif
1080 #endif
1081 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1082 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1083 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1084
1085 br->nf_call_iptables = val ? true : false;
1086 }
1087
1088 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1089 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1090
1091 br->nf_call_ip6tables = val ? true : false;
1092 }
1093
1094 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1095 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1096
1097 br->nf_call_arptables = val ? true : false;
1098 }
1099 #endif
1100
1101 return 0;
1102 }
1103
1104 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1105 struct nlattr *tb[], struct nlattr *data[])
1106 {
1107 struct net_bridge *br = netdev_priv(dev);
1108 int err;
1109
1110 if (tb[IFLA_ADDRESS]) {
1111 spin_lock_bh(&br->lock);
1112 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1113 spin_unlock_bh(&br->lock);
1114 }
1115
1116 err = br_changelink(dev, tb, data);
1117 if (err)
1118 return err;
1119
1120 return register_netdevice(dev);
1121 }
1122
1123 static size_t br_get_size(const struct net_device *brdev)
1124 {
1125 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1126 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1127 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1128 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1129 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1130 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1131 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1132 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1133 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1134 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1135 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1136 #endif
1137 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1138 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1139 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1140 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1141 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1142 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1143 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1144 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1145 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1146 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1147 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1148 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1149 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1150 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1151 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1152 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1153 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1154 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1155 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1156 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1157 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1158 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1159 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1160 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1161 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1162 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1163 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1164 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1165 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1166 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1167 #endif
1168 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1169 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1170 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1171 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1172 #endif
1173 0;
1174 }
1175
1176 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1177 {
1178 struct net_bridge *br = netdev_priv(brdev);
1179 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1180 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1181 u32 age_time = jiffies_to_clock_t(br->max_age);
1182 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1183 u32 stp_enabled = br->stp_enabled;
1184 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1185 u8 vlan_enabled = br_vlan_enabled(br);
1186 u64 clockval;
1187
1188 clockval = br_timer_value(&br->hello_timer);
1189 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1190 return -EMSGSIZE;
1191 clockval = br_timer_value(&br->tcn_timer);
1192 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1193 return -EMSGSIZE;
1194 clockval = br_timer_value(&br->topology_change_timer);
1195 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1196 IFLA_BR_PAD))
1197 return -EMSGSIZE;
1198 clockval = br_timer_value(&br->gc_timer);
1199 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1200 return -EMSGSIZE;
1201
1202 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1203 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1204 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1205 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1206 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1207 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1208 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1209 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1210 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1211 &br->bridge_id) ||
1212 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1213 &br->designated_root) ||
1214 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1215 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1216 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1217 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1218 br->topology_change_detected) ||
1219 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1220 return -EMSGSIZE;
1221
1222 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1223 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1224 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1225 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1226 return -EMSGSIZE;
1227 #endif
1228 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1229 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1230 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1231 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1232 br->multicast_query_use_ifaddr) ||
1233 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1234 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1235 br->multicast_stats_enabled) ||
1236 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1237 br->hash_elasticity) ||
1238 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1239 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1240 br->multicast_last_member_count) ||
1241 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1242 br->multicast_startup_query_count) ||
1243 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1244 br->multicast_igmp_version))
1245 return -EMSGSIZE;
1246 #if IS_ENABLED(CONFIG_IPV6)
1247 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1248 br->multicast_mld_version))
1249 return -EMSGSIZE;
1250 #endif
1251 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1252 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1253 IFLA_BR_PAD))
1254 return -EMSGSIZE;
1255 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1256 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1257 IFLA_BR_PAD))
1258 return -EMSGSIZE;
1259 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1260 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1261 IFLA_BR_PAD))
1262 return -EMSGSIZE;
1263 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1264 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1265 IFLA_BR_PAD))
1266 return -EMSGSIZE;
1267 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1268 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1269 IFLA_BR_PAD))
1270 return -EMSGSIZE;
1271 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1272 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1273 IFLA_BR_PAD))
1274 return -EMSGSIZE;
1275 #endif
1276 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1277 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1278 br->nf_call_iptables ? 1 : 0) ||
1279 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1280 br->nf_call_ip6tables ? 1 : 0) ||
1281 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1282 br->nf_call_arptables ? 1 : 0))
1283 return -EMSGSIZE;
1284 #endif
1285
1286 return 0;
1287 }
1288
1289 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1290 {
1291 struct net_bridge_port *p = NULL;
1292 struct net_bridge_vlan_group *vg;
1293 struct net_bridge_vlan *v;
1294 struct net_bridge *br;
1295 int numvls = 0;
1296
1297 switch (attr) {
1298 case IFLA_STATS_LINK_XSTATS:
1299 br = netdev_priv(dev);
1300 vg = br_vlan_group(br);
1301 break;
1302 case IFLA_STATS_LINK_XSTATS_SLAVE:
1303 p = br_port_get_rtnl(dev);
1304 if (!p)
1305 return 0;
1306 br = p->br;
1307 vg = nbp_vlan_group(p);
1308 break;
1309 default:
1310 return 0;
1311 }
1312
1313 if (vg) {
1314 /* we need to count all, even placeholder entries */
1315 list_for_each_entry(v, &vg->vlan_list, vlist)
1316 numvls++;
1317 }
1318
1319 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1320 nla_total_size(sizeof(struct br_mcast_stats)) +
1321 nla_total_size(0);
1322 }
1323
1324 static int br_fill_linkxstats(struct sk_buff *skb,
1325 const struct net_device *dev,
1326 int *prividx, int attr)
1327 {
1328 struct nlattr *nla __maybe_unused;
1329 struct net_bridge_port *p = NULL;
1330 struct net_bridge_vlan_group *vg;
1331 struct net_bridge_vlan *v;
1332 struct net_bridge *br;
1333 struct nlattr *nest;
1334 int vl_idx = 0;
1335
1336 switch (attr) {
1337 case IFLA_STATS_LINK_XSTATS:
1338 br = netdev_priv(dev);
1339 vg = br_vlan_group(br);
1340 break;
1341 case IFLA_STATS_LINK_XSTATS_SLAVE:
1342 p = br_port_get_rtnl(dev);
1343 if (!p)
1344 return 0;
1345 br = p->br;
1346 vg = nbp_vlan_group(p);
1347 break;
1348 default:
1349 return -EINVAL;
1350 }
1351
1352 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1353 if (!nest)
1354 return -EMSGSIZE;
1355
1356 if (vg) {
1357 u16 pvid;
1358
1359 pvid = br_get_pvid(vg);
1360 list_for_each_entry(v, &vg->vlan_list, vlist) {
1361 struct bridge_vlan_xstats vxi;
1362 struct br_vlan_stats stats;
1363
1364 if (++vl_idx < *prividx)
1365 continue;
1366 memset(&vxi, 0, sizeof(vxi));
1367 vxi.vid = v->vid;
1368 vxi.flags = v->flags;
1369 if (v->vid == pvid)
1370 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1371 br_vlan_get_stats(v, &stats);
1372 vxi.rx_bytes = stats.rx_bytes;
1373 vxi.rx_packets = stats.rx_packets;
1374 vxi.tx_bytes = stats.tx_bytes;
1375 vxi.tx_packets = stats.tx_packets;
1376
1377 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1378 goto nla_put_failure;
1379 }
1380 }
1381
1382 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1383 if (++vl_idx >= *prividx) {
1384 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1385 sizeof(struct br_mcast_stats),
1386 BRIDGE_XSTATS_PAD);
1387 if (!nla)
1388 goto nla_put_failure;
1389 br_multicast_get_stats(br, p, nla_data(nla));
1390 }
1391 #endif
1392 nla_nest_end(skb, nest);
1393 *prividx = 0;
1394
1395 return 0;
1396
1397 nla_put_failure:
1398 nla_nest_end(skb, nest);
1399 *prividx = vl_idx;
1400
1401 return -EMSGSIZE;
1402 }
1403
1404 static struct rtnl_af_ops br_af_ops __read_mostly = {
1405 .family = AF_BRIDGE,
1406 .get_link_af_size = br_get_link_af_size_filtered,
1407 };
1408
1409 struct rtnl_link_ops br_link_ops __read_mostly = {
1410 .kind = "bridge",
1411 .priv_size = sizeof(struct net_bridge),
1412 .setup = br_dev_setup,
1413 .maxtype = IFLA_BR_MAX,
1414 .policy = br_policy,
1415 .validate = br_validate,
1416 .newlink = br_dev_newlink,
1417 .changelink = br_changelink,
1418 .dellink = br_dev_delete,
1419 .get_size = br_get_size,
1420 .fill_info = br_fill_info,
1421 .fill_linkxstats = br_fill_linkxstats,
1422 .get_linkxstats_size = br_get_linkxstats_size,
1423
1424 .slave_maxtype = IFLA_BRPORT_MAX,
1425 .slave_policy = br_port_policy,
1426 .slave_changelink = br_port_slave_changelink,
1427 .get_slave_size = br_port_get_slave_size,
1428 .fill_slave_info = br_port_fill_slave_info,
1429 };
1430
1431 int __init br_netlink_init(void)
1432 {
1433 int err;
1434
1435 br_mdb_init();
1436 rtnl_af_register(&br_af_ops);
1437
1438 err = rtnl_link_register(&br_link_ops);
1439 if (err)
1440 goto out_af;
1441
1442 return 0;
1443
1444 out_af:
1445 rtnl_af_unregister(&br_af_ops);
1446 br_mdb_uninit();
1447 return err;
1448 }
1449
1450 void br_netlink_fini(void)
1451 {
1452 br_mdb_uninit();
1453 rtnl_af_unregister(&br_af_ops);
1454 rtnl_link_unregister(&br_link_ops);
1455 }
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