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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[mirror_ubuntu-artful-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_MCAST_TO_UCAST */
127 + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
128 + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
129 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
130 + nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
131 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
132 + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
133 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
134 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
135 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
136 + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
137 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
138 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
139 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
140 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
141 + nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
142 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
143 + nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
144 #endif
145 + 0;
146 }
147
148 static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
149 {
150 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
151 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
152 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
153 + nla_total_size(4) /* IFLA_MASTER */
154 + nla_total_size(4) /* IFLA_MTU */
155 + nla_total_size(4) /* IFLA_LINK */
156 + nla_total_size(1) /* IFLA_OPERSTATE */
157 + nla_total_size(br_port_info_size()) /* IFLA_PROTINFO */
158 + nla_total_size(br_get_link_af_size_filtered(dev,
159 filter_mask)); /* IFLA_AF_SPEC */
160 }
161
162 static int br_port_fill_attrs(struct sk_buff *skb,
163 const struct net_bridge_port *p)
164 {
165 u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
166 u64 timerval;
167
168 if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
169 nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
170 nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
171 nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
172 nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
173 nla_put_u8(skb, IFLA_BRPORT_PROTECT,
174 !!(p->flags & BR_ROOT_BLOCK)) ||
175 nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
176 !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
177 nla_put_u8(skb, IFLA_BRPORT_MCAST_TO_UCAST,
178 !!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
179 nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
180 nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
181 !!(p->flags & BR_FLOOD)) ||
182 nla_put_u8(skb, IFLA_BRPORT_MCAST_FLOOD,
183 !!(p->flags & BR_MCAST_FLOOD)) ||
184 nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
185 nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
186 !!(p->flags & BR_PROXYARP_WIFI)) ||
187 nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
188 &p->designated_root) ||
189 nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
190 &p->designated_bridge) ||
191 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
192 nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
193 nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
194 nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
195 nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
196 p->topology_change_ack) ||
197 nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
198 return -EMSGSIZE;
199
200 timerval = br_timer_value(&p->message_age_timer);
201 if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
202 IFLA_BRPORT_PAD))
203 return -EMSGSIZE;
204 timerval = br_timer_value(&p->forward_delay_timer);
205 if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
206 IFLA_BRPORT_PAD))
207 return -EMSGSIZE;
208 timerval = br_timer_value(&p->hold_timer);
209 if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
210 IFLA_BRPORT_PAD))
211 return -EMSGSIZE;
212
213 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
214 if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
215 p->multicast_router))
216 return -EMSGSIZE;
217 #endif
218
219 return 0;
220 }
221
222 static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
223 u16 vid_end, u16 flags)
224 {
225 struct bridge_vlan_info vinfo;
226
227 if ((vid_end - vid_start) > 0) {
228 /* add range to skb */
229 vinfo.vid = vid_start;
230 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
231 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
232 sizeof(vinfo), &vinfo))
233 goto nla_put_failure;
234
235 vinfo.vid = vid_end;
236 vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
237 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
238 sizeof(vinfo), &vinfo))
239 goto nla_put_failure;
240 } else {
241 vinfo.vid = vid_start;
242 vinfo.flags = flags;
243 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
244 sizeof(vinfo), &vinfo))
245 goto nla_put_failure;
246 }
247
248 return 0;
249
250 nla_put_failure:
251 return -EMSGSIZE;
252 }
253
254 static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
255 struct net_bridge_vlan_group *vg)
256 {
257 struct net_bridge_vlan *v;
258 u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
259 u16 flags, pvid;
260 int err = 0;
261
262 /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
263 * and mark vlan info with begin and end flags
264 * if vlaninfo represents a range
265 */
266 pvid = br_get_pvid(vg);
267 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
268 flags = 0;
269 if (!br_vlan_should_use(v))
270 continue;
271 if (v->vid == pvid)
272 flags |= BRIDGE_VLAN_INFO_PVID;
273
274 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
275 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
276
277 if (vid_range_start == 0) {
278 goto initvars;
279 } else if ((v->vid - vid_range_end) == 1 &&
280 flags == vid_range_flags) {
281 vid_range_end = v->vid;
282 continue;
283 } else {
284 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
285 vid_range_end,
286 vid_range_flags);
287 if (err)
288 return err;
289 }
290
291 initvars:
292 vid_range_start = v->vid;
293 vid_range_end = v->vid;
294 vid_range_flags = flags;
295 }
296
297 if (vid_range_start != 0) {
298 /* Call it once more to send any left over vlans */
299 err = br_fill_ifvlaninfo_range(skb, vid_range_start,
300 vid_range_end,
301 vid_range_flags);
302 if (err)
303 return err;
304 }
305
306 return 0;
307 }
308
309 static int br_fill_ifvlaninfo(struct sk_buff *skb,
310 struct net_bridge_vlan_group *vg)
311 {
312 struct bridge_vlan_info vinfo;
313 struct net_bridge_vlan *v;
314 u16 pvid;
315
316 pvid = br_get_pvid(vg);
317 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
318 if (!br_vlan_should_use(v))
319 continue;
320
321 vinfo.vid = v->vid;
322 vinfo.flags = 0;
323 if (v->vid == pvid)
324 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
325
326 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
327 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
328
329 if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
330 sizeof(vinfo), &vinfo))
331 goto nla_put_failure;
332 }
333
334 return 0;
335
336 nla_put_failure:
337 return -EMSGSIZE;
338 }
339
340 /*
341 * Create one netlink message for one interface
342 * Contains port and master info as well as carrier and bridge state.
343 */
344 static int br_fill_ifinfo(struct sk_buff *skb,
345 struct net_bridge_port *port,
346 u32 pid, u32 seq, int event, unsigned int flags,
347 u32 filter_mask, const struct net_device *dev)
348 {
349 struct net_bridge *br;
350 struct ifinfomsg *hdr;
351 struct nlmsghdr *nlh;
352 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
353
354 if (port)
355 br = port->br;
356 else
357 br = netdev_priv(dev);
358
359 br_debug(br, "br_fill_info event %d port %s master %s\n",
360 event, dev->name, br->dev->name);
361
362 nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
363 if (nlh == NULL)
364 return -EMSGSIZE;
365
366 hdr = nlmsg_data(nlh);
367 hdr->ifi_family = AF_BRIDGE;
368 hdr->__ifi_pad = 0;
369 hdr->ifi_type = dev->type;
370 hdr->ifi_index = dev->ifindex;
371 hdr->ifi_flags = dev_get_flags(dev);
372 hdr->ifi_change = 0;
373
374 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
375 nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
376 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
377 nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
378 (dev->addr_len &&
379 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
380 (dev->ifindex != dev_get_iflink(dev) &&
381 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
382 goto nla_put_failure;
383
384 if (event == RTM_NEWLINK && port) {
385 struct nlattr *nest
386 = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
387
388 if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
389 goto nla_put_failure;
390 nla_nest_end(skb, nest);
391 }
392
393 /* Check if the VID information is requested */
394 if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
395 (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
396 struct net_bridge_vlan_group *vg;
397 struct nlattr *af;
398 int err;
399
400 /* RCU needed because of the VLAN locking rules (rcu || rtnl) */
401 rcu_read_lock();
402 if (port)
403 vg = nbp_vlan_group_rcu(port);
404 else
405 vg = br_vlan_group_rcu(br);
406
407 if (!vg || !vg->num_vlans) {
408 rcu_read_unlock();
409 goto done;
410 }
411 af = nla_nest_start(skb, IFLA_AF_SPEC);
412 if (!af) {
413 rcu_read_unlock();
414 goto nla_put_failure;
415 }
416 if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
417 err = br_fill_ifvlaninfo_compressed(skb, vg);
418 else
419 err = br_fill_ifvlaninfo(skb, vg);
420 rcu_read_unlock();
421 if (err)
422 goto nla_put_failure;
423 nla_nest_end(skb, af);
424 }
425
426 done:
427 nlmsg_end(skb, nlh);
428 return 0;
429
430 nla_put_failure:
431 nlmsg_cancel(skb, nlh);
432 return -EMSGSIZE;
433 }
434
435 /*
436 * Notify listeners of a change in port information
437 */
438 void br_ifinfo_notify(int event, struct net_bridge_port *port)
439 {
440 struct net *net;
441 struct sk_buff *skb;
442 int err = -ENOBUFS;
443 u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
444
445 if (!port)
446 return;
447
448 net = dev_net(port->dev);
449 br_debug(port->br, "port %u(%s) event %d\n",
450 (unsigned int)port->port_no, port->dev->name, event);
451
452 skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
453 if (skb == NULL)
454 goto errout;
455
456 err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
457 if (err < 0) {
458 /* -EMSGSIZE implies BUG in br_nlmsg_size() */
459 WARN_ON(err == -EMSGSIZE);
460 kfree_skb(skb);
461 goto errout;
462 }
463 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
464 return;
465 errout:
466 rtnl_set_sk_err(net, RTNLGRP_LINK, err);
467 }
468
469
470 /*
471 * Dump information about all ports, in response to GETLINK
472 */
473 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
474 struct net_device *dev, u32 filter_mask, int nlflags)
475 {
476 struct net_bridge_port *port = br_port_get_rtnl(dev);
477
478 if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
479 !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
480 return 0;
481
482 return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
483 filter_mask, dev);
484 }
485
486 static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
487 int cmd, struct bridge_vlan_info *vinfo)
488 {
489 int err = 0;
490
491 switch (cmd) {
492 case RTM_SETLINK:
493 if (p) {
494 /* if the MASTER flag is set this will act on the global
495 * per-VLAN entry as well
496 */
497 err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
498 if (err)
499 break;
500 } else {
501 vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
502 err = br_vlan_add(br, vinfo->vid, vinfo->flags);
503 }
504 break;
505
506 case RTM_DELLINK:
507 if (p) {
508 nbp_vlan_delete(p, vinfo->vid);
509 if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
510 br_vlan_delete(p->br, vinfo->vid);
511 } else {
512 br_vlan_delete(br, vinfo->vid);
513 }
514 break;
515 }
516
517 return err;
518 }
519
520 static int br_afspec(struct net_bridge *br,
521 struct net_bridge_port *p,
522 struct nlattr *af_spec,
523 int cmd)
524 {
525 struct bridge_vlan_info *vinfo_start = NULL;
526 struct bridge_vlan_info *vinfo = NULL;
527 struct nlattr *attr;
528 int err = 0;
529 int rem;
530
531 nla_for_each_nested(attr, af_spec, rem) {
532 if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
533 continue;
534 if (nla_len(attr) != sizeof(struct bridge_vlan_info))
535 return -EINVAL;
536 vinfo = nla_data(attr);
537 if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
538 return -EINVAL;
539 if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
540 if (vinfo_start)
541 return -EINVAL;
542 vinfo_start = vinfo;
543 /* don't allow range of pvids */
544 if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
545 return -EINVAL;
546 continue;
547 }
548
549 if (vinfo_start) {
550 struct bridge_vlan_info tmp_vinfo;
551 int v;
552
553 if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
554 return -EINVAL;
555
556 if (vinfo->vid <= vinfo_start->vid)
557 return -EINVAL;
558
559 memcpy(&tmp_vinfo, vinfo_start,
560 sizeof(struct bridge_vlan_info));
561
562 for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
563 tmp_vinfo.vid = v;
564 err = br_vlan_info(br, p, cmd, &tmp_vinfo);
565 if (err)
566 break;
567 }
568 vinfo_start = NULL;
569 } else {
570 err = br_vlan_info(br, p, cmd, vinfo);
571 }
572 if (err)
573 break;
574 }
575
576 return err;
577 }
578
579 static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
580 [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
581 [IFLA_BRPORT_COST] = { .type = NLA_U32 },
582 [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
583 [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
584 [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
585 [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
586 [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
587 [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
588 [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
589 [IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
590 [IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
591 [IFLA_BRPORT_MULTICAST_ROUTER] = { .type = NLA_U8 },
592 [IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
593 };
594
595 /* Change the state of the port and notify spanning tree */
596 static int br_set_port_state(struct net_bridge_port *p, u8 state)
597 {
598 if (state > BR_STATE_BLOCKING)
599 return -EINVAL;
600
601 /* if kernel STP is running, don't allow changes */
602 if (p->br->stp_enabled == BR_KERNEL_STP)
603 return -EBUSY;
604
605 /* if device is not up, change is not allowed
606 * if link is not present, only allowable state is disabled
607 */
608 if (!netif_running(p->dev) ||
609 (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
610 return -ENETDOWN;
611
612 br_set_state(p, state);
613 br_port_state_selection(p->br);
614 return 0;
615 }
616
617 /* Set/clear or port flags based on attribute */
618 static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
619 int attrtype, unsigned long mask)
620 {
621 if (tb[attrtype]) {
622 u8 flag = nla_get_u8(tb[attrtype]);
623 if (flag)
624 p->flags |= mask;
625 else
626 p->flags &= ~mask;
627 }
628 }
629
630 /* Process bridge protocol info on port */
631 static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
632 {
633 int err;
634 unsigned long old_flags = p->flags;
635
636 br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
637 br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
638 br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
639 br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
640 br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
641 br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
642 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
643 br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
644 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
645 br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
646
647 if (tb[IFLA_BRPORT_COST]) {
648 err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
649 if (err)
650 return err;
651 }
652
653 if (tb[IFLA_BRPORT_PRIORITY]) {
654 err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
655 if (err)
656 return err;
657 }
658
659 if (tb[IFLA_BRPORT_STATE]) {
660 err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
661 if (err)
662 return err;
663 }
664
665 if (tb[IFLA_BRPORT_FLUSH])
666 br_fdb_delete_by_port(p->br, p, 0, 0);
667
668 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
669 if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
670 u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
671
672 err = br_multicast_set_port_router(p, mcast_router);
673 if (err)
674 return err;
675 }
676 #endif
677 br_port_flags_change(p, old_flags ^ p->flags);
678 return 0;
679 }
680
681 /* Change state and parameters on port. */
682 int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
683 {
684 struct nlattr *protinfo;
685 struct nlattr *afspec;
686 struct net_bridge_port *p;
687 struct nlattr *tb[IFLA_BRPORT_MAX + 1];
688 int err = 0;
689
690 protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
691 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
692 if (!protinfo && !afspec)
693 return 0;
694
695 p = br_port_get_rtnl(dev);
696 /* We want to accept dev as bridge itself if the AF_SPEC
697 * is set to see if someone is setting vlan info on the bridge
698 */
699 if (!p && !afspec)
700 return -EINVAL;
701
702 if (p && protinfo) {
703 if (protinfo->nla_type & NLA_F_NESTED) {
704 err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
705 protinfo, br_port_policy);
706 if (err)
707 return err;
708
709 spin_lock_bh(&p->br->lock);
710 err = br_setport(p, tb);
711 spin_unlock_bh(&p->br->lock);
712 } else {
713 /* Binary compatibility with old RSTP */
714 if (nla_len(protinfo) < sizeof(u8))
715 return -EINVAL;
716
717 spin_lock_bh(&p->br->lock);
718 err = br_set_port_state(p, nla_get_u8(protinfo));
719 spin_unlock_bh(&p->br->lock);
720 }
721 if (err)
722 goto out;
723 }
724
725 if (afspec) {
726 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
727 afspec, RTM_SETLINK);
728 }
729
730 if (err == 0)
731 br_ifinfo_notify(RTM_NEWLINK, p);
732 out:
733 return err;
734 }
735
736 /* Delete port information */
737 int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
738 {
739 struct nlattr *afspec;
740 struct net_bridge_port *p;
741 int err = 0;
742
743 afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
744 if (!afspec)
745 return 0;
746
747 p = br_port_get_rtnl(dev);
748 /* We want to accept dev as bridge itself as well */
749 if (!p && !(dev->priv_flags & IFF_EBRIDGE))
750 return -EINVAL;
751
752 err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
753 afspec, RTM_DELLINK);
754 if (err == 0)
755 /* Send RTM_NEWLINK because userspace
756 * expects RTM_NEWLINK for vlan dels
757 */
758 br_ifinfo_notify(RTM_NEWLINK, p);
759
760 return err;
761 }
762 static int br_validate(struct nlattr *tb[], struct nlattr *data[])
763 {
764 if (tb[IFLA_ADDRESS]) {
765 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
766 return -EINVAL;
767 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
768 return -EADDRNOTAVAIL;
769 }
770
771 if (!data)
772 return 0;
773
774 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
775 if (data[IFLA_BR_VLAN_PROTOCOL]) {
776 switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
777 case htons(ETH_P_8021Q):
778 case htons(ETH_P_8021AD):
779 break;
780 default:
781 return -EPROTONOSUPPORT;
782 }
783 }
784 #endif
785
786 return 0;
787 }
788
789 static int br_port_slave_changelink(struct net_device *brdev,
790 struct net_device *dev,
791 struct nlattr *tb[],
792 struct nlattr *data[])
793 {
794 struct net_bridge *br = netdev_priv(brdev);
795 int ret;
796
797 if (!data)
798 return 0;
799
800 spin_lock_bh(&br->lock);
801 ret = br_setport(br_port_get_rtnl(dev), data);
802 spin_unlock_bh(&br->lock);
803
804 return ret;
805 }
806
807 static int br_port_fill_slave_info(struct sk_buff *skb,
808 const struct net_device *brdev,
809 const struct net_device *dev)
810 {
811 return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
812 }
813
814 static size_t br_port_get_slave_size(const struct net_device *brdev,
815 const struct net_device *dev)
816 {
817 return br_port_info_size();
818 }
819
820 static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
821 [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
822 [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
823 [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
824 [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
825 [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
826 [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
827 [IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
828 [IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
829 [IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
830 [IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
831 .len = ETH_ALEN },
832 [IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
833 [IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
834 [IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
835 [IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
836 [IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
837 [IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
838 [IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
839 [IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
840 [IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
841 [IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
842 [IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
843 [IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
844 [IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
845 [IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
846 [IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
847 [IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
848 [IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
849 [IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
850 [IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
851 [IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
852 [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
853 [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
854 };
855
856 static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
857 struct nlattr *data[])
858 {
859 struct net_bridge *br = netdev_priv(brdev);
860 int err;
861
862 if (!data)
863 return 0;
864
865 if (data[IFLA_BR_FORWARD_DELAY]) {
866 err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
867 if (err)
868 return err;
869 }
870
871 if (data[IFLA_BR_HELLO_TIME]) {
872 err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
873 if (err)
874 return err;
875 }
876
877 if (data[IFLA_BR_MAX_AGE]) {
878 err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
879 if (err)
880 return err;
881 }
882
883 if (data[IFLA_BR_AGEING_TIME]) {
884 err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
885 if (err)
886 return err;
887 }
888
889 if (data[IFLA_BR_STP_STATE]) {
890 u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
891
892 br_stp_set_enabled(br, stp_enabled);
893 }
894
895 if (data[IFLA_BR_PRIORITY]) {
896 u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
897
898 br_stp_set_bridge_priority(br, priority);
899 }
900
901 if (data[IFLA_BR_VLAN_FILTERING]) {
902 u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
903
904 err = __br_vlan_filter_toggle(br, vlan_filter);
905 if (err)
906 return err;
907 }
908
909 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
910 if (data[IFLA_BR_VLAN_PROTOCOL]) {
911 __be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
912
913 err = __br_vlan_set_proto(br, vlan_proto);
914 if (err)
915 return err;
916 }
917
918 if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
919 __u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
920
921 err = __br_vlan_set_default_pvid(br, defpvid);
922 if (err)
923 return err;
924 }
925
926 if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
927 __u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
928
929 err = br_vlan_set_stats(br, vlan_stats);
930 if (err)
931 return err;
932 }
933 #endif
934
935 if (data[IFLA_BR_GROUP_FWD_MASK]) {
936 u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
937
938 if (fwd_mask & BR_GROUPFWD_RESTRICTED)
939 return -EINVAL;
940 br->group_fwd_mask = fwd_mask;
941 }
942
943 if (data[IFLA_BR_GROUP_ADDR]) {
944 u8 new_addr[ETH_ALEN];
945
946 if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
947 return -EINVAL;
948 memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
949 if (!is_link_local_ether_addr(new_addr))
950 return -EINVAL;
951 if (new_addr[5] == 1 || /* 802.3x Pause address */
952 new_addr[5] == 2 || /* 802.3ad Slow protocols */
953 new_addr[5] == 3) /* 802.1X PAE address */
954 return -EINVAL;
955 spin_lock_bh(&br->lock);
956 memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
957 spin_unlock_bh(&br->lock);
958 br->group_addr_set = true;
959 br_recalculate_fwd_mask(br);
960 }
961
962 if (data[IFLA_BR_FDB_FLUSH])
963 br_fdb_flush(br);
964
965 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
966 if (data[IFLA_BR_MCAST_ROUTER]) {
967 u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
968
969 err = br_multicast_set_router(br, multicast_router);
970 if (err)
971 return err;
972 }
973
974 if (data[IFLA_BR_MCAST_SNOOPING]) {
975 u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
976
977 err = br_multicast_toggle(br, mcast_snooping);
978 if (err)
979 return err;
980 }
981
982 if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
983 u8 val;
984
985 val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
986 br->multicast_query_use_ifaddr = !!val;
987 }
988
989 if (data[IFLA_BR_MCAST_QUERIER]) {
990 u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
991
992 err = br_multicast_set_querier(br, mcast_querier);
993 if (err)
994 return err;
995 }
996
997 if (data[IFLA_BR_MCAST_HASH_ELASTICITY]) {
998 u32 val = nla_get_u32(data[IFLA_BR_MCAST_HASH_ELASTICITY]);
999
1000 br->hash_elasticity = val;
1001 }
1002
1003 if (data[IFLA_BR_MCAST_HASH_MAX]) {
1004 u32 hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
1005
1006 err = br_multicast_set_hash_max(br, hash_max);
1007 if (err)
1008 return err;
1009 }
1010
1011 if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
1012 u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
1013
1014 br->multicast_last_member_count = val;
1015 }
1016
1017 if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
1018 u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
1019
1020 br->multicast_startup_query_count = val;
1021 }
1022
1023 if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
1024 u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
1025
1026 br->multicast_last_member_interval = clock_t_to_jiffies(val);
1027 }
1028
1029 if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
1030 u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
1031
1032 br->multicast_membership_interval = clock_t_to_jiffies(val);
1033 }
1034
1035 if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
1036 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
1037
1038 br->multicast_querier_interval = clock_t_to_jiffies(val);
1039 }
1040
1041 if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
1042 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
1043
1044 br->multicast_query_interval = clock_t_to_jiffies(val);
1045 }
1046
1047 if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
1048 u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
1049
1050 br->multicast_query_response_interval = clock_t_to_jiffies(val);
1051 }
1052
1053 if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
1054 u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
1055
1056 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
1057 }
1058
1059 if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
1060 __u8 mcast_stats;
1061
1062 mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
1063 br->multicast_stats_enabled = !!mcast_stats;
1064 }
1065
1066 if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
1067 __u8 igmp_version;
1068
1069 igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
1070 err = br_multicast_set_igmp_version(br, igmp_version);
1071 if (err)
1072 return err;
1073 }
1074
1075 #if IS_ENABLED(CONFIG_IPV6)
1076 if (data[IFLA_BR_MCAST_MLD_VERSION]) {
1077 __u8 mld_version;
1078
1079 mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
1080 err = br_multicast_set_mld_version(br, mld_version);
1081 if (err)
1082 return err;
1083 }
1084 #endif
1085 #endif
1086 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1087 if (data[IFLA_BR_NF_CALL_IPTABLES]) {
1088 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
1089
1090 br->nf_call_iptables = val ? true : false;
1091 }
1092
1093 if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
1094 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
1095
1096 br->nf_call_ip6tables = val ? true : false;
1097 }
1098
1099 if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
1100 u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
1101
1102 br->nf_call_arptables = val ? true : false;
1103 }
1104 #endif
1105
1106 return 0;
1107 }
1108
1109 static int br_dev_newlink(struct net *src_net, struct net_device *dev,
1110 struct nlattr *tb[], struct nlattr *data[])
1111 {
1112 struct net_bridge *br = netdev_priv(dev);
1113 int err;
1114
1115 if (tb[IFLA_ADDRESS]) {
1116 spin_lock_bh(&br->lock);
1117 br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
1118 spin_unlock_bh(&br->lock);
1119 }
1120
1121 err = br_changelink(dev, tb, data);
1122 if (err)
1123 return err;
1124
1125 return register_netdevice(dev);
1126 }
1127
1128 static size_t br_get_size(const struct net_device *brdev)
1129 {
1130 return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
1131 nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
1132 nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
1133 nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
1134 nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
1135 nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
1136 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
1137 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1138 nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
1139 nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
1140 nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
1141 #endif
1142 nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
1143 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
1144 nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
1145 nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
1146 nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
1147 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
1148 nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
1149 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
1150 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
1151 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
1152 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
1153 nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
1154 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1155 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
1156 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
1157 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
1158 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
1159 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
1160 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
1161 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
1162 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
1163 nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
1164 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
1165 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
1166 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
1167 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
1168 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
1169 nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
1170 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
1171 nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
1172 #endif
1173 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1174 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
1175 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
1176 nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
1177 #endif
1178 0;
1179 }
1180
1181 static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
1182 {
1183 struct net_bridge *br = netdev_priv(brdev);
1184 u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
1185 u32 hello_time = jiffies_to_clock_t(br->hello_time);
1186 u32 age_time = jiffies_to_clock_t(br->max_age);
1187 u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
1188 u32 stp_enabled = br->stp_enabled;
1189 u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
1190 u8 vlan_enabled = br_vlan_enabled(br);
1191 u64 clockval;
1192
1193 clockval = br_timer_value(&br->hello_timer);
1194 if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
1195 return -EMSGSIZE;
1196 clockval = br_timer_value(&br->tcn_timer);
1197 if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
1198 return -EMSGSIZE;
1199 clockval = br_timer_value(&br->topology_change_timer);
1200 if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
1201 IFLA_BR_PAD))
1202 return -EMSGSIZE;
1203 clockval = br_timer_value(&br->gc_timer);
1204 if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
1205 return -EMSGSIZE;
1206
1207 if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
1208 nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
1209 nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
1210 nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
1211 nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
1212 nla_put_u16(skb, IFLA_BR_PRIORITY, priority) ||
1213 nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
1214 nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
1215 nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
1216 &br->bridge_id) ||
1217 nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
1218 &br->designated_root) ||
1219 nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
1220 nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
1221 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
1222 nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
1223 br->topology_change_detected) ||
1224 nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr))
1225 return -EMSGSIZE;
1226
1227 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1228 if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
1229 nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
1230 nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED, br->vlan_stats_enabled))
1231 return -EMSGSIZE;
1232 #endif
1233 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1234 if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
1235 nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING, !br->multicast_disabled) ||
1236 nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
1237 br->multicast_query_use_ifaddr) ||
1238 nla_put_u8(skb, IFLA_BR_MCAST_QUERIER, br->multicast_querier) ||
1239 nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
1240 br->multicast_stats_enabled) ||
1241 nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY,
1242 br->hash_elasticity) ||
1243 nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
1244 nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
1245 br->multicast_last_member_count) ||
1246 nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
1247 br->multicast_startup_query_count) ||
1248 nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
1249 br->multicast_igmp_version))
1250 return -EMSGSIZE;
1251 #if IS_ENABLED(CONFIG_IPV6)
1252 if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
1253 br->multicast_mld_version))
1254 return -EMSGSIZE;
1255 #endif
1256 clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
1257 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
1258 IFLA_BR_PAD))
1259 return -EMSGSIZE;
1260 clockval = jiffies_to_clock_t(br->multicast_membership_interval);
1261 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
1262 IFLA_BR_PAD))
1263 return -EMSGSIZE;
1264 clockval = jiffies_to_clock_t(br->multicast_querier_interval);
1265 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
1266 IFLA_BR_PAD))
1267 return -EMSGSIZE;
1268 clockval = jiffies_to_clock_t(br->multicast_query_interval);
1269 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
1270 IFLA_BR_PAD))
1271 return -EMSGSIZE;
1272 clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
1273 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
1274 IFLA_BR_PAD))
1275 return -EMSGSIZE;
1276 clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
1277 if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
1278 IFLA_BR_PAD))
1279 return -EMSGSIZE;
1280 #endif
1281 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1282 if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
1283 br->nf_call_iptables ? 1 : 0) ||
1284 nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
1285 br->nf_call_ip6tables ? 1 : 0) ||
1286 nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
1287 br->nf_call_arptables ? 1 : 0))
1288 return -EMSGSIZE;
1289 #endif
1290
1291 return 0;
1292 }
1293
1294 static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
1295 {
1296 struct net_bridge_port *p = NULL;
1297 struct net_bridge_vlan_group *vg;
1298 struct net_bridge_vlan *v;
1299 struct net_bridge *br;
1300 int numvls = 0;
1301
1302 switch (attr) {
1303 case IFLA_STATS_LINK_XSTATS:
1304 br = netdev_priv(dev);
1305 vg = br_vlan_group(br);
1306 break;
1307 case IFLA_STATS_LINK_XSTATS_SLAVE:
1308 p = br_port_get_rtnl(dev);
1309 if (!p)
1310 return 0;
1311 br = p->br;
1312 vg = nbp_vlan_group(p);
1313 break;
1314 default:
1315 return 0;
1316 }
1317
1318 if (vg) {
1319 /* we need to count all, even placeholder entries */
1320 list_for_each_entry(v, &vg->vlan_list, vlist)
1321 numvls++;
1322 }
1323
1324 return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
1325 nla_total_size(sizeof(struct br_mcast_stats)) +
1326 nla_total_size(0);
1327 }
1328
1329 static int br_fill_linkxstats(struct sk_buff *skb,
1330 const struct net_device *dev,
1331 int *prividx, int attr)
1332 {
1333 struct nlattr *nla __maybe_unused;
1334 struct net_bridge_port *p = NULL;
1335 struct net_bridge_vlan_group *vg;
1336 struct net_bridge_vlan *v;
1337 struct net_bridge *br;
1338 struct nlattr *nest;
1339 int vl_idx = 0;
1340
1341 switch (attr) {
1342 case IFLA_STATS_LINK_XSTATS:
1343 br = netdev_priv(dev);
1344 vg = br_vlan_group(br);
1345 break;
1346 case IFLA_STATS_LINK_XSTATS_SLAVE:
1347 p = br_port_get_rtnl(dev);
1348 if (!p)
1349 return 0;
1350 br = p->br;
1351 vg = nbp_vlan_group(p);
1352 break;
1353 default:
1354 return -EINVAL;
1355 }
1356
1357 nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BRIDGE);
1358 if (!nest)
1359 return -EMSGSIZE;
1360
1361 if (vg) {
1362 u16 pvid;
1363
1364 pvid = br_get_pvid(vg);
1365 list_for_each_entry(v, &vg->vlan_list, vlist) {
1366 struct bridge_vlan_xstats vxi;
1367 struct br_vlan_stats stats;
1368
1369 if (++vl_idx < *prividx)
1370 continue;
1371 memset(&vxi, 0, sizeof(vxi));
1372 vxi.vid = v->vid;
1373 vxi.flags = v->flags;
1374 if (v->vid == pvid)
1375 vxi.flags |= BRIDGE_VLAN_INFO_PVID;
1376 br_vlan_get_stats(v, &stats);
1377 vxi.rx_bytes = stats.rx_bytes;
1378 vxi.rx_packets = stats.rx_packets;
1379 vxi.tx_bytes = stats.tx_bytes;
1380 vxi.tx_packets = stats.tx_packets;
1381
1382 if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
1383 goto nla_put_failure;
1384 }
1385 }
1386
1387 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
1388 if (++vl_idx >= *prividx) {
1389 nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
1390 sizeof(struct br_mcast_stats),
1391 BRIDGE_XSTATS_PAD);
1392 if (!nla)
1393 goto nla_put_failure;
1394 br_multicast_get_stats(br, p, nla_data(nla));
1395 }
1396 #endif
1397 nla_nest_end(skb, nest);
1398 *prividx = 0;
1399
1400 return 0;
1401
1402 nla_put_failure:
1403 nla_nest_end(skb, nest);
1404 *prividx = vl_idx;
1405
1406 return -EMSGSIZE;
1407 }
1408
1409 static struct rtnl_af_ops br_af_ops __read_mostly = {
1410 .family = AF_BRIDGE,
1411 .get_link_af_size = br_get_link_af_size_filtered,
1412 };
1413
1414 struct rtnl_link_ops br_link_ops __read_mostly = {
1415 .kind = "bridge",
1416 .priv_size = sizeof(struct net_bridge),
1417 .setup = br_dev_setup,
1418 .maxtype = IFLA_BR_MAX,
1419 .policy = br_policy,
1420 .validate = br_validate,
1421 .newlink = br_dev_newlink,
1422 .changelink = br_changelink,
1423 .dellink = br_dev_delete,
1424 .get_size = br_get_size,
1425 .fill_info = br_fill_info,
1426 .fill_linkxstats = br_fill_linkxstats,
1427 .get_linkxstats_size = br_get_linkxstats_size,
1428
1429 .slave_maxtype = IFLA_BRPORT_MAX,
1430 .slave_policy = br_port_policy,
1431 .slave_changelink = br_port_slave_changelink,
1432 .get_slave_size = br_port_get_slave_size,
1433 .fill_slave_info = br_port_fill_slave_info,
1434 };
1435
1436 int __init br_netlink_init(void)
1437 {
1438 int err;
1439
1440 br_mdb_init();
1441 rtnl_af_register(&br_af_ops);
1442
1443 err = rtnl_link_register(&br_link_ops);
1444 if (err)
1445 goto out_af;
1446
1447 return 0;
1448
1449 out_af:
1450 rtnl_af_unregister(&br_af_ops);
1451 br_mdb_uninit();
1452 return err;
1453 }
1454
1455 void br_netlink_fini(void)
1456 {
1457 br_mdb_uninit();
1458 rtnl_af_unregister(&br_af_ops);
1459 rtnl_link_unregister(&br_link_ops);
1460 }
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