1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Sysfs attributes of bridge
4 * Linux ethernet bridge
5 *
6 * Authors:
7 * Stephen Hemminger <shemminger@osdl.org>
8 */
9
10#include <linux/capability.h>
11#include <linux/kernel.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/if_bridge.h>
15#include <linux/rtnetlink.h>
16#include <linux/spinlock.h>
17#include <linux/times.h>
18#include <linux/sched/signal.h>
19
20#include "br_private.h"
21
22/* IMPORTANT: new bridge options must be added with netlink support only
23 * please do not add new sysfs entries
24 */
25
26#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
27
28/*
29 * Common code for storing bridge parameters.
30 */
31static ssize_t store_bridge_parm(struct device *d,
32 const char *buf, size_t len,
33 int (*set)(struct net_bridge *br, unsigned long val,
34 struct netlink_ext_ack *extack))
35{
36 struct net_bridge *br = to_bridge(d);
37 struct netlink_ext_ack extack = {0};
38 unsigned long val;
39 int err;
40
41 if (!ns_capable(ns: dev_net(dev: br->dev)->user_ns, CAP_NET_ADMIN))
42 return -EPERM;
43
44 err = kstrtoul(s: buf, base: 0, res: &val);
45 if (err != 0)
46 return err;
47
48 if (!rtnl_trylock())
49 return restart_syscall();
50
51 err = (*set)(br, val, &extack);
52 if (!err)
53 netdev_state_change(dev: br->dev);
54 if (extack._msg) {
55 if (err)
56 br_err(br, "%s\n", extack._msg);
57 else
58 br_warn(br, "%s\n", extack._msg);
59 }
60 rtnl_unlock();
61
62 return err ? err : len;
63}
64
65
66static ssize_t forward_delay_show(struct device *d,
67 struct device_attribute *attr, char *buf)
68{
69 struct net_bridge *br = to_bridge(d);
70 return sprintf(buf, fmt: "%lu\n", jiffies_to_clock_t(x: br->forward_delay));
71}
72
73static int set_forward_delay(struct net_bridge *br, unsigned long val,
74 struct netlink_ext_ack *extack)
75{
76 return br_set_forward_delay(br, x: val);
77}
78
79static ssize_t forward_delay_store(struct device *d,
80 struct device_attribute *attr,
81 const char *buf, size_t len)
82{
83 return store_bridge_parm(d, buf, len, set: set_forward_delay);
84}
85static DEVICE_ATTR_RW(forward_delay);
86
87static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
88 char *buf)
89{
90 return sprintf(buf, fmt: "%lu\n",
91 jiffies_to_clock_t(to_bridge(d)->hello_time));
92}
93
94static int set_hello_time(struct net_bridge *br, unsigned long val,
95 struct netlink_ext_ack *extack)
96{
97 return br_set_hello_time(br, x: val);
98}
99
100static ssize_t hello_time_store(struct device *d,
101 struct device_attribute *attr, const char *buf,
102 size_t len)
103{
104 return store_bridge_parm(d, buf, len, set: set_hello_time);
105}
106static DEVICE_ATTR_RW(hello_time);
107
108static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
109 char *buf)
110{
111 return sprintf(buf, fmt: "%lu\n",
112 jiffies_to_clock_t(to_bridge(d)->max_age));
113}
114
115static int set_max_age(struct net_bridge *br, unsigned long val,
116 struct netlink_ext_ack *extack)
117{
118 return br_set_max_age(br, x: val);
119}
120
121static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
122 const char *buf, size_t len)
123{
124 return store_bridge_parm(d, buf, len, set: set_max_age);
125}
126static DEVICE_ATTR_RW(max_age);
127
128static ssize_t ageing_time_show(struct device *d,
129 struct device_attribute *attr, char *buf)
130{
131 struct net_bridge *br = to_bridge(d);
132 return sprintf(buf, fmt: "%lu\n", jiffies_to_clock_t(x: br->ageing_time));
133}
134
135static int set_ageing_time(struct net_bridge *br, unsigned long val,
136 struct netlink_ext_ack *extack)
137{
138 return br_set_ageing_time(br, ageing_time: val);
139}
140
141static ssize_t ageing_time_store(struct device *d,
142 struct device_attribute *attr,
143 const char *buf, size_t len)
144{
145 return store_bridge_parm(d, buf, len, set: set_ageing_time);
146}
147static DEVICE_ATTR_RW(ageing_time);
148
149static ssize_t stp_state_show(struct device *d,
150 struct device_attribute *attr, char *buf)
151{
152 struct net_bridge *br = to_bridge(d);
153 return sprintf(buf, fmt: "%d\n", br->stp_enabled);
154}
155
156
157static int set_stp_state(struct net_bridge *br, unsigned long val,
158 struct netlink_ext_ack *extack)
159{
160 return br_stp_set_enabled(br, val, extack);
161}
162
163static ssize_t stp_state_store(struct device *d,
164 struct device_attribute *attr, const char *buf,
165 size_t len)
166{
167 return store_bridge_parm(d, buf, len, set: set_stp_state);
168}
169static DEVICE_ATTR_RW(stp_state);
170
171static ssize_t group_fwd_mask_show(struct device *d,
172 struct device_attribute *attr,
173 char *buf)
174{
175 struct net_bridge *br = to_bridge(d);
176 return sprintf(buf, fmt: "%#x\n", br->group_fwd_mask);
177}
178
179static int set_group_fwd_mask(struct net_bridge *br, unsigned long val,
180 struct netlink_ext_ack *extack)
181{
182 if (val & BR_GROUPFWD_RESTRICTED)
183 return -EINVAL;
184
185 br->group_fwd_mask = val;
186
187 return 0;
188}
189
190static ssize_t group_fwd_mask_store(struct device *d,
191 struct device_attribute *attr,
192 const char *buf,
193 size_t len)
194{
195 return store_bridge_parm(d, buf, len, set: set_group_fwd_mask);
196}
197static DEVICE_ATTR_RW(group_fwd_mask);
198
199static ssize_t priority_show(struct device *d, struct device_attribute *attr,
200 char *buf)
201{
202 struct net_bridge *br = to_bridge(d);
203 return sprintf(buf, fmt: "%d\n",
204 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
205}
206
207static int set_priority(struct net_bridge *br, unsigned long val,
208 struct netlink_ext_ack *extack)
209{
210 br_stp_set_bridge_priority(br, newprio: (u16) val);
211 return 0;
212}
213
214static ssize_t priority_store(struct device *d, struct device_attribute *attr,
215 const char *buf, size_t len)
216{
217 return store_bridge_parm(d, buf, len, set: set_priority);
218}
219static DEVICE_ATTR_RW(priority);
220
221static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
222 char *buf)
223{
224 return br_show_bridge_id(buf, id: &to_bridge(d)->designated_root);
225}
226static DEVICE_ATTR_RO(root_id);
227
228static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
229 char *buf)
230{
231 return br_show_bridge_id(buf, id: &to_bridge(d)->bridge_id);
232}
233static DEVICE_ATTR_RO(bridge_id);
234
235static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
236 char *buf)
237{
238 return sprintf(buf, fmt: "%d\n", to_bridge(d)->root_port);
239}
240static DEVICE_ATTR_RO(root_port);
241
242static ssize_t root_path_cost_show(struct device *d,
243 struct device_attribute *attr, char *buf)
244{
245 return sprintf(buf, fmt: "%d\n", to_bridge(d)->root_path_cost);
246}
247static DEVICE_ATTR_RO(root_path_cost);
248
249static ssize_t topology_change_show(struct device *d,
250 struct device_attribute *attr, char *buf)
251{
252 return sprintf(buf, fmt: "%d\n", to_bridge(d)->topology_change);
253}
254static DEVICE_ATTR_RO(topology_change);
255
256static ssize_t topology_change_detected_show(struct device *d,
257 struct device_attribute *attr,
258 char *buf)
259{
260 struct net_bridge *br = to_bridge(d);
261 return sprintf(buf, fmt: "%d\n", br->topology_change_detected);
262}
263static DEVICE_ATTR_RO(topology_change_detected);
264
265static ssize_t hello_timer_show(struct device *d,
266 struct device_attribute *attr, char *buf)
267{
268 struct net_bridge *br = to_bridge(d);
269 return sprintf(buf, fmt: "%ld\n", br_timer_value(timer: &br->hello_timer));
270}
271static DEVICE_ATTR_RO(hello_timer);
272
273static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
274 char *buf)
275{
276 struct net_bridge *br = to_bridge(d);
277 return sprintf(buf, fmt: "%ld\n", br_timer_value(timer: &br->tcn_timer));
278}
279static DEVICE_ATTR_RO(tcn_timer);
280
281static ssize_t topology_change_timer_show(struct device *d,
282 struct device_attribute *attr,
283 char *buf)
284{
285 struct net_bridge *br = to_bridge(d);
286 return sprintf(buf, fmt: "%ld\n", br_timer_value(timer: &br->topology_change_timer));
287}
288static DEVICE_ATTR_RO(topology_change_timer);
289
290static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
291 char *buf)
292{
293 struct net_bridge *br = to_bridge(d);
294 return sprintf(buf, fmt: "%ld\n", br_timer_value(timer: &br->gc_work.timer));
295}
296static DEVICE_ATTR_RO(gc_timer);
297
298static ssize_t group_addr_show(struct device *d,
299 struct device_attribute *attr, char *buf)
300{
301 struct net_bridge *br = to_bridge(d);
302 return sprintf(buf, fmt: "%pM\n", br->group_addr);
303}
304
305static ssize_t group_addr_store(struct device *d,
306 struct device_attribute *attr,
307 const char *buf, size_t len)
308{
309 struct net_bridge *br = to_bridge(d);
310 u8 new_addr[6];
311
312 if (!ns_capable(ns: dev_net(dev: br->dev)->user_ns, CAP_NET_ADMIN))
313 return -EPERM;
314
315 if (!mac_pton(s: buf, mac: new_addr))
316 return -EINVAL;
317
318 if (!is_link_local_ether_addr(addr: new_addr))
319 return -EINVAL;
320
321 if (new_addr[5] == 1 || /* 802.3x Pause address */
322 new_addr[5] == 2 || /* 802.3ad Slow protocols */
323 new_addr[5] == 3) /* 802.1X PAE address */
324 return -EINVAL;
325
326 if (!rtnl_trylock())
327 return restart_syscall();
328
329 spin_lock_bh(lock: &br->lock);
330 ether_addr_copy(dst: br->group_addr, src: new_addr);
331 spin_unlock_bh(lock: &br->lock);
332
333 br_opt_toggle(br, opt: BROPT_GROUP_ADDR_SET, on: true);
334 br_recalculate_fwd_mask(br);
335 netdev_state_change(dev: br->dev);
336
337 rtnl_unlock();
338
339 return len;
340}
341
342static DEVICE_ATTR_RW(group_addr);
343
344static int set_flush(struct net_bridge *br, unsigned long val,
345 struct netlink_ext_ack *extack)
346{
347 struct net_bridge_fdb_flush_desc desc = {
348 .flags_mask = BIT(BR_FDB_STATIC)
349 };
350
351 br_fdb_flush(br, desc: &desc);
352 return 0;
353}
354
355static ssize_t flush_store(struct device *d,
356 struct device_attribute *attr,
357 const char *buf, size_t len)
358{
359 return store_bridge_parm(d, buf, len, set: set_flush);
360}
361static DEVICE_ATTR_WO(flush);
362
363static ssize_t no_linklocal_learn_show(struct device *d,
364 struct device_attribute *attr,
365 char *buf)
366{
367 struct net_bridge *br = to_bridge(d);
368 return sprintf(buf, fmt: "%d\n", br_boolopt_get(br, opt: BR_BOOLOPT_NO_LL_LEARN));
369}
370
371static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val,
372 struct netlink_ext_ack *extack)
373{
374 return br_boolopt_toggle(br, opt: BR_BOOLOPT_NO_LL_LEARN, on: !!val, extack);
375}
376
377static ssize_t no_linklocal_learn_store(struct device *d,
378 struct device_attribute *attr,
379 const char *buf, size_t len)
380{
381 return store_bridge_parm(d, buf, len, set: set_no_linklocal_learn);
382}
383static DEVICE_ATTR_RW(no_linklocal_learn);
384
385#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
386static ssize_t multicast_router_show(struct device *d,
387 struct device_attribute *attr, char *buf)
388{
389 struct net_bridge *br = to_bridge(d);
390 return sprintf(buf, fmt: "%d\n", br->multicast_ctx.multicast_router);
391}
392
393static int set_multicast_router(struct net_bridge *br, unsigned long val,
394 struct netlink_ext_ack *extack)
395{
396 return br_multicast_set_router(brmctx: &br->multicast_ctx, val);
397}
398
399static ssize_t multicast_router_store(struct device *d,
400 struct device_attribute *attr,
401 const char *buf, size_t len)
402{
403 return store_bridge_parm(d, buf, len, set: set_multicast_router);
404}
405static DEVICE_ATTR_RW(multicast_router);
406
407static ssize_t multicast_snooping_show(struct device *d,
408 struct device_attribute *attr,
409 char *buf)
410{
411 struct net_bridge *br = to_bridge(d);
412 return sprintf(buf, fmt: "%d\n", br_opt_get(br, opt: BROPT_MULTICAST_ENABLED));
413}
414
415static ssize_t multicast_snooping_store(struct device *d,
416 struct device_attribute *attr,
417 const char *buf, size_t len)
418{
419 return store_bridge_parm(d, buf, len, set: br_multicast_toggle);
420}
421static DEVICE_ATTR_RW(multicast_snooping);
422
423static ssize_t multicast_query_use_ifaddr_show(struct device *d,
424 struct device_attribute *attr,
425 char *buf)
426{
427 struct net_bridge *br = to_bridge(d);
428 return sprintf(buf, fmt: "%d\n",
429 br_opt_get(br, opt: BROPT_MULTICAST_QUERY_USE_IFADDR));
430}
431
432static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val,
433 struct netlink_ext_ack *extack)
434{
435 br_opt_toggle(br, opt: BROPT_MULTICAST_QUERY_USE_IFADDR, on: !!val);
436 return 0;
437}
438
439static ssize_t
440multicast_query_use_ifaddr_store(struct device *d,
441 struct device_attribute *attr,
442 const char *buf, size_t len)
443{
444 return store_bridge_parm(d, buf, len, set: set_query_use_ifaddr);
445}
446static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
447
448static ssize_t multicast_querier_show(struct device *d,
449 struct device_attribute *attr,
450 char *buf)
451{
452 struct net_bridge *br = to_bridge(d);
453 return sprintf(buf, fmt: "%d\n", br->multicast_ctx.multicast_querier);
454}
455
456static int set_multicast_querier(struct net_bridge *br, unsigned long val,
457 struct netlink_ext_ack *extack)
458{
459 return br_multicast_set_querier(brmctx: &br->multicast_ctx, val);
460}
461
462static ssize_t multicast_querier_store(struct device *d,
463 struct device_attribute *attr,
464 const char *buf, size_t len)
465{
466 return store_bridge_parm(d, buf, len, set: set_multicast_querier);
467}
468static DEVICE_ATTR_RW(multicast_querier);
469
470static ssize_t hash_elasticity_show(struct device *d,
471 struct device_attribute *attr, char *buf)
472{
473 return sprintf(buf, fmt: "%u\n", RHT_ELASTICITY);
474}
475
476static int set_elasticity(struct net_bridge *br, unsigned long val,
477 struct netlink_ext_ack *extack)
478{
479 /* 16 is RHT_ELASTICITY */
480 NL_SET_ERR_MSG_MOD(extack,
481 "the hash_elasticity option has been deprecated and is always 16");
482 return 0;
483}
484
485static ssize_t hash_elasticity_store(struct device *d,
486 struct device_attribute *attr,
487 const char *buf, size_t len)
488{
489 return store_bridge_parm(d, buf, len, set: set_elasticity);
490}
491static DEVICE_ATTR_RW(hash_elasticity);
492
493static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
494 char *buf)
495{
496 struct net_bridge *br = to_bridge(d);
497 return sprintf(buf, fmt: "%u\n", br->hash_max);
498}
499
500static int set_hash_max(struct net_bridge *br, unsigned long val,
501 struct netlink_ext_ack *extack)
502{
503 br->hash_max = val;
504 return 0;
505}
506
507static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
508 const char *buf, size_t len)
509{
510 return store_bridge_parm(d, buf, len, set: set_hash_max);
511}
512static DEVICE_ATTR_RW(hash_max);
513
514static ssize_t multicast_igmp_version_show(struct device *d,
515 struct device_attribute *attr,
516 char *buf)
517{
518 struct net_bridge *br = to_bridge(d);
519
520 return sprintf(buf, fmt: "%u\n", br->multicast_ctx.multicast_igmp_version);
521}
522
523static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val,
524 struct netlink_ext_ack *extack)
525{
526 return br_multicast_set_igmp_version(brmctx: &br->multicast_ctx, val);
527}
528
529static ssize_t multicast_igmp_version_store(struct device *d,
530 struct device_attribute *attr,
531 const char *buf, size_t len)
532{
533 return store_bridge_parm(d, buf, len, set: set_multicast_igmp_version);
534}
535static DEVICE_ATTR_RW(multicast_igmp_version);
536
537static ssize_t multicast_last_member_count_show(struct device *d,
538 struct device_attribute *attr,
539 char *buf)
540{
541 struct net_bridge *br = to_bridge(d);
542 return sprintf(buf, fmt: "%u\n", br->multicast_ctx.multicast_last_member_count);
543}
544
545static int set_last_member_count(struct net_bridge *br, unsigned long val,
546 struct netlink_ext_ack *extack)
547{
548 br->multicast_ctx.multicast_last_member_count = val;
549 return 0;
550}
551
552static ssize_t multicast_last_member_count_store(struct device *d,
553 struct device_attribute *attr,
554 const char *buf, size_t len)
555{
556 return store_bridge_parm(d, buf, len, set: set_last_member_count);
557}
558static DEVICE_ATTR_RW(multicast_last_member_count);
559
560static ssize_t multicast_startup_query_count_show(
561 struct device *d, struct device_attribute *attr, char *buf)
562{
563 struct net_bridge *br = to_bridge(d);
564 return sprintf(buf, fmt: "%u\n", br->multicast_ctx.multicast_startup_query_count);
565}
566
567static int set_startup_query_count(struct net_bridge *br, unsigned long val,
568 struct netlink_ext_ack *extack)
569{
570 br->multicast_ctx.multicast_startup_query_count = val;
571 return 0;
572}
573
574static ssize_t multicast_startup_query_count_store(
575 struct device *d, struct device_attribute *attr, const char *buf,
576 size_t len)
577{
578 return store_bridge_parm(d, buf, len, set: set_startup_query_count);
579}
580static DEVICE_ATTR_RW(multicast_startup_query_count);
581
582static ssize_t multicast_last_member_interval_show(
583 struct device *d, struct device_attribute *attr, char *buf)
584{
585 struct net_bridge *br = to_bridge(d);
586 return sprintf(buf, fmt: "%lu\n",
587 jiffies_to_clock_t(x: br->multicast_ctx.multicast_last_member_interval));
588}
589
590static int set_last_member_interval(struct net_bridge *br, unsigned long val,
591 struct netlink_ext_ack *extack)
592{
593 br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(x: val);
594 return 0;
595}
596
597static ssize_t multicast_last_member_interval_store(
598 struct device *d, struct device_attribute *attr, const char *buf,
599 size_t len)
600{
601 return store_bridge_parm(d, buf, len, set: set_last_member_interval);
602}
603static DEVICE_ATTR_RW(multicast_last_member_interval);
604
605static ssize_t multicast_membership_interval_show(
606 struct device *d, struct device_attribute *attr, char *buf)
607{
608 struct net_bridge *br = to_bridge(d);
609 return sprintf(buf, fmt: "%lu\n",
610 jiffies_to_clock_t(x: br->multicast_ctx.multicast_membership_interval));
611}
612
613static int set_membership_interval(struct net_bridge *br, unsigned long val,
614 struct netlink_ext_ack *extack)
615{
616 br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(x: val);
617 return 0;
618}
619
620static ssize_t multicast_membership_interval_store(
621 struct device *d, struct device_attribute *attr, const char *buf,
622 size_t len)
623{
624 return store_bridge_parm(d, buf, len, set: set_membership_interval);
625}
626static DEVICE_ATTR_RW(multicast_membership_interval);
627
628static ssize_t multicast_querier_interval_show(struct device *d,
629 struct device_attribute *attr,
630 char *buf)
631{
632 struct net_bridge *br = to_bridge(d);
633 return sprintf(buf, fmt: "%lu\n",
634 jiffies_to_clock_t(x: br->multicast_ctx.multicast_querier_interval));
635}
636
637static int set_querier_interval(struct net_bridge *br, unsigned long val,
638 struct netlink_ext_ack *extack)
639{
640 br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(x: val);
641 return 0;
642}
643
644static ssize_t multicast_querier_interval_store(struct device *d,
645 struct device_attribute *attr,
646 const char *buf, size_t len)
647{
648 return store_bridge_parm(d, buf, len, set: set_querier_interval);
649}
650static DEVICE_ATTR_RW(multicast_querier_interval);
651
652static ssize_t multicast_query_interval_show(struct device *d,
653 struct device_attribute *attr,
654 char *buf)
655{
656 struct net_bridge *br = to_bridge(d);
657 return sprintf(buf, fmt: "%lu\n",
658 jiffies_to_clock_t(x: br->multicast_ctx.multicast_query_interval));
659}
660
661static int set_query_interval(struct net_bridge *br, unsigned long val,
662 struct netlink_ext_ack *extack)
663{
664 br_multicast_set_query_intvl(brmctx: &br->multicast_ctx, val);
665 return 0;
666}
667
668static ssize_t multicast_query_interval_store(struct device *d,
669 struct device_attribute *attr,
670 const char *buf, size_t len)
671{
672 return store_bridge_parm(d, buf, len, set: set_query_interval);
673}
674static DEVICE_ATTR_RW(multicast_query_interval);
675
676static ssize_t multicast_query_response_interval_show(
677 struct device *d, struct device_attribute *attr, char *buf)
678{
679 struct net_bridge *br = to_bridge(d);
680 return sprintf(
681 buf, fmt: "%lu\n",
682 jiffies_to_clock_t(x: br->multicast_ctx.multicast_query_response_interval));
683}
684
685static int set_query_response_interval(struct net_bridge *br, unsigned long val,
686 struct netlink_ext_ack *extack)
687{
688 br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(x: val);
689 return 0;
690}
691
692static ssize_t multicast_query_response_interval_store(
693 struct device *d, struct device_attribute *attr, const char *buf,
694 size_t len)
695{
696 return store_bridge_parm(d, buf, len, set: set_query_response_interval);
697}
698static DEVICE_ATTR_RW(multicast_query_response_interval);
699
700static ssize_t multicast_startup_query_interval_show(
701 struct device *d, struct device_attribute *attr, char *buf)
702{
703 struct net_bridge *br = to_bridge(d);
704 return sprintf(
705 buf, fmt: "%lu\n",
706 jiffies_to_clock_t(x: br->multicast_ctx.multicast_startup_query_interval));
707}
708
709static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
710 struct netlink_ext_ack *extack)
711{
712 br_multicast_set_startup_query_intvl(brmctx: &br->multicast_ctx, val);
713 return 0;
714}
715
716static ssize_t multicast_startup_query_interval_store(
717 struct device *d, struct device_attribute *attr, const char *buf,
718 size_t len)
719{
720 return store_bridge_parm(d, buf, len, set: set_startup_query_interval);
721}
722static DEVICE_ATTR_RW(multicast_startup_query_interval);
723
724static ssize_t multicast_stats_enabled_show(struct device *d,
725 struct device_attribute *attr,
726 char *buf)
727{
728 struct net_bridge *br = to_bridge(d);
729
730 return sprintf(buf, fmt: "%d\n",
731 br_opt_get(br, opt: BROPT_MULTICAST_STATS_ENABLED));
732}
733
734static int set_stats_enabled(struct net_bridge *br, unsigned long val,
735 struct netlink_ext_ack *extack)
736{
737 br_opt_toggle(br, opt: BROPT_MULTICAST_STATS_ENABLED, on: !!val);
738 return 0;
739}
740
741static ssize_t multicast_stats_enabled_store(struct device *d,
742 struct device_attribute *attr,
743 const char *buf,
744 size_t len)
745{
746 return store_bridge_parm(d, buf, len, set: set_stats_enabled);
747}
748static DEVICE_ATTR_RW(multicast_stats_enabled);
749
750#if IS_ENABLED(CONFIG_IPV6)
751static ssize_t multicast_mld_version_show(struct device *d,
752 struct device_attribute *attr,
753 char *buf)
754{
755 struct net_bridge *br = to_bridge(d);
756
757 return sprintf(buf, fmt: "%u\n", br->multicast_ctx.multicast_mld_version);
758}
759
760static int set_multicast_mld_version(struct net_bridge *br, unsigned long val,
761 struct netlink_ext_ack *extack)
762{
763 return br_multicast_set_mld_version(brmctx: &br->multicast_ctx, val);
764}
765
766static ssize_t multicast_mld_version_store(struct device *d,
767 struct device_attribute *attr,
768 const char *buf, size_t len)
769{
770 return store_bridge_parm(d, buf, len, set: set_multicast_mld_version);
771}
772static DEVICE_ATTR_RW(multicast_mld_version);
773#endif
774#endif
775#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
776static ssize_t nf_call_iptables_show(
777 struct device *d, struct device_attribute *attr, char *buf)
778{
779 struct net_bridge *br = to_bridge(d);
780 return sprintf(buf, fmt: "%u\n", br_opt_get(br, opt: BROPT_NF_CALL_IPTABLES));
781}
782
783static int set_nf_call_iptables(struct net_bridge *br, unsigned long val,
784 struct netlink_ext_ack *extack)
785{
786 br_opt_toggle(br, opt: BROPT_NF_CALL_IPTABLES, on: !!val);
787 return 0;
788}
789
790static ssize_t nf_call_iptables_store(
791 struct device *d, struct device_attribute *attr, const char *buf,
792 size_t len)
793{
794 return store_bridge_parm(d, buf, len, set: set_nf_call_iptables);
795}
796static DEVICE_ATTR_RW(nf_call_iptables);
797
798static ssize_t nf_call_ip6tables_show(
799 struct device *d, struct device_attribute *attr, char *buf)
800{
801 struct net_bridge *br = to_bridge(d);
802 return sprintf(buf, fmt: "%u\n", br_opt_get(br, opt: BROPT_NF_CALL_IP6TABLES));
803}
804
805static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val,
806 struct netlink_ext_ack *extack)
807{
808 br_opt_toggle(br, opt: BROPT_NF_CALL_IP6TABLES, on: !!val);
809 return 0;
810}
811
812static ssize_t nf_call_ip6tables_store(
813 struct device *d, struct device_attribute *attr, const char *buf,
814 size_t len)
815{
816 return store_bridge_parm(d, buf, len, set: set_nf_call_ip6tables);
817}
818static DEVICE_ATTR_RW(nf_call_ip6tables);
819
820static ssize_t nf_call_arptables_show(
821 struct device *d, struct device_attribute *attr, char *buf)
822{
823 struct net_bridge *br = to_bridge(d);
824 return sprintf(buf, fmt: "%u\n", br_opt_get(br, opt: BROPT_NF_CALL_ARPTABLES));
825}
826
827static int set_nf_call_arptables(struct net_bridge *br, unsigned long val,
828 struct netlink_ext_ack *extack)
829{
830 br_opt_toggle(br, opt: BROPT_NF_CALL_ARPTABLES, on: !!val);
831 return 0;
832}
833
834static ssize_t nf_call_arptables_store(
835 struct device *d, struct device_attribute *attr, const char *buf,
836 size_t len)
837{
838 return store_bridge_parm(d, buf, len, set: set_nf_call_arptables);
839}
840static DEVICE_ATTR_RW(nf_call_arptables);
841#endif
842#ifdef CONFIG_BRIDGE_VLAN_FILTERING
843static ssize_t vlan_filtering_show(struct device *d,
844 struct device_attribute *attr,
845 char *buf)
846{
847 struct net_bridge *br = to_bridge(d);
848 return sprintf(buf, fmt: "%d\n", br_opt_get(br, opt: BROPT_VLAN_ENABLED));
849}
850
851static ssize_t vlan_filtering_store(struct device *d,
852 struct device_attribute *attr,
853 const char *buf, size_t len)
854{
855 return store_bridge_parm(d, buf, len, set: br_vlan_filter_toggle);
856}
857static DEVICE_ATTR_RW(vlan_filtering);
858
859static ssize_t vlan_protocol_show(struct device *d,
860 struct device_attribute *attr,
861 char *buf)
862{
863 struct net_bridge *br = to_bridge(d);
864 return sprintf(buf, fmt: "%#06x\n", ntohs(br->vlan_proto));
865}
866
867static ssize_t vlan_protocol_store(struct device *d,
868 struct device_attribute *attr,
869 const char *buf, size_t len)
870{
871 return store_bridge_parm(d, buf, len, set: br_vlan_set_proto);
872}
873static DEVICE_ATTR_RW(vlan_protocol);
874
875static ssize_t default_pvid_show(struct device *d,
876 struct device_attribute *attr,
877 char *buf)
878{
879 struct net_bridge *br = to_bridge(d);
880 return sprintf(buf, fmt: "%d\n", br->default_pvid);
881}
882
883static ssize_t default_pvid_store(struct device *d,
884 struct device_attribute *attr,
885 const char *buf, size_t len)
886{
887 return store_bridge_parm(d, buf, len, set: br_vlan_set_default_pvid);
888}
889static DEVICE_ATTR_RW(default_pvid);
890
891static ssize_t vlan_stats_enabled_show(struct device *d,
892 struct device_attribute *attr,
893 char *buf)
894{
895 struct net_bridge *br = to_bridge(d);
896 return sprintf(buf, fmt: "%u\n", br_opt_get(br, opt: BROPT_VLAN_STATS_ENABLED));
897}
898
899static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val,
900 struct netlink_ext_ack *extack)
901{
902 return br_vlan_set_stats(br, val);
903}
904
905static ssize_t vlan_stats_enabled_store(struct device *d,
906 struct device_attribute *attr,
907 const char *buf, size_t len)
908{
909 return store_bridge_parm(d, buf, len, set: set_vlan_stats_enabled);
910}
911static DEVICE_ATTR_RW(vlan_stats_enabled);
912
913static ssize_t vlan_stats_per_port_show(struct device *d,
914 struct device_attribute *attr,
915 char *buf)
916{
917 struct net_bridge *br = to_bridge(d);
918 return sprintf(buf, fmt: "%u\n", br_opt_get(br, opt: BROPT_VLAN_STATS_PER_PORT));
919}
920
921static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val,
922 struct netlink_ext_ack *extack)
923{
924 return br_vlan_set_stats_per_port(br, val);
925}
926
927static ssize_t vlan_stats_per_port_store(struct device *d,
928 struct device_attribute *attr,
929 const char *buf, size_t len)
930{
931 return store_bridge_parm(d, buf, len, set: set_vlan_stats_per_port);
932}
933static DEVICE_ATTR_RW(vlan_stats_per_port);
934#endif
935
936static struct attribute *bridge_attrs[] = {
937 &dev_attr_forward_delay.attr,
938 &dev_attr_hello_time.attr,
939 &dev_attr_max_age.attr,
940 &dev_attr_ageing_time.attr,
941 &dev_attr_stp_state.attr,
942 &dev_attr_group_fwd_mask.attr,
943 &dev_attr_priority.attr,
944 &dev_attr_bridge_id.attr,
945 &dev_attr_root_id.attr,
946 &dev_attr_root_path_cost.attr,
947 &dev_attr_root_port.attr,
948 &dev_attr_topology_change.attr,
949 &dev_attr_topology_change_detected.attr,
950 &dev_attr_hello_timer.attr,
951 &dev_attr_tcn_timer.attr,
952 &dev_attr_topology_change_timer.attr,
953 &dev_attr_gc_timer.attr,
954 &dev_attr_group_addr.attr,
955 &dev_attr_flush.attr,
956 &dev_attr_no_linklocal_learn.attr,
957#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
958 &dev_attr_multicast_router.attr,
959 &dev_attr_multicast_snooping.attr,
960 &dev_attr_multicast_querier.attr,
961 &dev_attr_multicast_query_use_ifaddr.attr,
962 &dev_attr_hash_elasticity.attr,
963 &dev_attr_hash_max.attr,
964 &dev_attr_multicast_last_member_count.attr,
965 &dev_attr_multicast_startup_query_count.attr,
966 &dev_attr_multicast_last_member_interval.attr,
967 &dev_attr_multicast_membership_interval.attr,
968 &dev_attr_multicast_querier_interval.attr,
969 &dev_attr_multicast_query_interval.attr,
970 &dev_attr_multicast_query_response_interval.attr,
971 &dev_attr_multicast_startup_query_interval.attr,
972 &dev_attr_multicast_stats_enabled.attr,
973 &dev_attr_multicast_igmp_version.attr,
974#if IS_ENABLED(CONFIG_IPV6)
975 &dev_attr_multicast_mld_version.attr,
976#endif
977#endif
978#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
979 &dev_attr_nf_call_iptables.attr,
980 &dev_attr_nf_call_ip6tables.attr,
981 &dev_attr_nf_call_arptables.attr,
982#endif
983#ifdef CONFIG_BRIDGE_VLAN_FILTERING
984 &dev_attr_vlan_filtering.attr,
985 &dev_attr_vlan_protocol.attr,
986 &dev_attr_default_pvid.attr,
987 &dev_attr_vlan_stats_enabled.attr,
988 &dev_attr_vlan_stats_per_port.attr,
989#endif
990 NULL
991};
992
993static const struct attribute_group bridge_group = {
994 .name = SYSFS_BRIDGE_ATTR,
995 .attrs = bridge_attrs,
996};
997
998/*
999 * Export the forwarding information table as a binary file
1000 * The records are struct __fdb_entry.
1001 *
1002 * Returns the number of bytes read.
1003 */
1004static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
1005 struct bin_attribute *bin_attr,
1006 char *buf, loff_t off, size_t count)
1007{
1008 struct device *dev = kobj_to_dev(kobj);
1009 struct net_bridge *br = to_bridge(dev);
1010 int n;
1011
1012 /* must read whole records */
1013 if (off % sizeof(struct __fdb_entry) != 0)
1014 return -EINVAL;
1015
1016 n = br_fdb_fillbuf(br, buf,
1017 count: count / sizeof(struct __fdb_entry),
1018 off: off / sizeof(struct __fdb_entry));
1019
1020 if (n > 0)
1021 n *= sizeof(struct __fdb_entry);
1022
1023 return n;
1024}
1025
1026static struct bin_attribute bridge_forward = {
1027 .attr = { .name = SYSFS_BRIDGE_FDB,
1028 .mode = 0444, },
1029 .read = brforward_read,
1030};
1031
1032/*
1033 * Add entries in sysfs onto the existing network class device
1034 * for the bridge.
1035 * Adds a attribute group "bridge" containing tuning parameters.
1036 * Binary attribute containing the forward table
1037 * Sub directory to hold links to interfaces.
1038 *
1039 * Note: the ifobj exists only to be a subdirectory
1040 * to hold links. The ifobj exists in same data structure
1041 * as it's parent the bridge so reference counting works.
1042 */
1043int br_sysfs_addbr(struct net_device *dev)
1044{
1045 struct kobject *brobj = &dev->dev.kobj;
1046 struct net_bridge *br = netdev_priv(dev);
1047 int err;
1048
1049 err = sysfs_create_group(kobj: brobj, grp: &bridge_group);
1050 if (err) {
1051 pr_info("%s: can't create group %s/%s\n",
1052 __func__, dev->name, bridge_group.name);
1053 goto out1;
1054 }
1055
1056 err = sysfs_create_bin_file(kobj: brobj, attr: &bridge_forward);
1057 if (err) {
1058 pr_info("%s: can't create attribute file %s/%s\n",
1059 __func__, dev->name, bridge_forward.attr.name);
1060 goto out2;
1061 }
1062
1063 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, parent: brobj);
1064 if (!br->ifobj) {
1065 pr_info("%s: can't add kobject (directory) %s/%s\n",
1066 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
1067 err = -ENOMEM;
1068 goto out3;
1069 }
1070 return 0;
1071 out3:
1072 sysfs_remove_bin_file(kobj: &dev->dev.kobj, attr: &bridge_forward);
1073 out2:
1074 sysfs_remove_group(kobj: &dev->dev.kobj, grp: &bridge_group);
1075 out1:
1076 return err;
1077
1078}
1079
1080void br_sysfs_delbr(struct net_device *dev)
1081{
1082 struct kobject *kobj = &dev->dev.kobj;
1083 struct net_bridge *br = netdev_priv(dev);
1084
1085 kobject_put(kobj: br->ifobj);
1086 sysfs_remove_bin_file(kobj, attr: &bridge_forward);
1087 sysfs_remove_group(kobj, grp: &bridge_group);
1088}
1089

source code of linux/net/bridge/br_sysfs_br.c