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