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1/*
2 * Sysfs attributes of bridge
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Stephen Hemminger <shemminger@osdl.org>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
14#include <linux/capability.h>
15#include <linux/kernel.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <linux/if_bridge.h>
19#include <linux/rtnetlink.h>
20#include <linux/spinlock.h>
21#include <linux/times.h>
22
23#include "br_private.h"
24
25#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
26
27/*
28 * Common code for storing bridge parameters.
29 */
30static ssize_t store_bridge_parm(struct device *d,
31 const char *buf, size_t len,
32 int (*set)(struct net_bridge *, unsigned long))
33{
34 struct net_bridge *br = to_bridge(d);
35 char *endp;
36 unsigned long val;
37 int err;
38
39 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
40 return -EPERM;
41
42 val = simple_strtoul(buf, &endp, 0);
43 if (endp == buf)
44 return -EINVAL;
45
46 err = (*set)(br, val);
47 return err ? err : len;
48}
49
50
51static ssize_t forward_delay_show(struct device *d,
52 struct device_attribute *attr, char *buf)
53{
54 struct net_bridge *br = to_bridge(d);
55 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
56}
57
58static ssize_t forward_delay_store(struct device *d,
59 struct device_attribute *attr,
60 const char *buf, size_t len)
61{
62 return store_bridge_parm(d, buf, len, br_set_forward_delay);
63}
64static DEVICE_ATTR_RW(forward_delay);
65
66static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
67 char *buf)
68{
69 return sprintf(buf, "%lu\n",
70 jiffies_to_clock_t(to_bridge(d)->hello_time));
71}
72
73static ssize_t hello_time_store(struct device *d,
74 struct device_attribute *attr, const char *buf,
75 size_t len)
76{
77 return store_bridge_parm(d, buf, len, br_set_hello_time);
78}
79static DEVICE_ATTR_RW(hello_time);
80
81static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
82 char *buf)
83{
84 return sprintf(buf, "%lu\n",
85 jiffies_to_clock_t(to_bridge(d)->max_age));
86}
87
88static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
89 const char *buf, size_t len)
90{
91 return store_bridge_parm(d, buf, len, br_set_max_age);
92}
93static DEVICE_ATTR_RW(max_age);
94
95static ssize_t ageing_time_show(struct device *d,
96 struct device_attribute *attr, char *buf)
97{
98 struct net_bridge *br = to_bridge(d);
99 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
100}
101
102static int set_ageing_time(struct net_bridge *br, unsigned long val)
103{
104 int ret;
105
106 if (!rtnl_trylock())
107 return restart_syscall();
108
109 ret = br_set_ageing_time(br, val);
110 rtnl_unlock();
111
112 return ret;
113}
114
115static ssize_t ageing_time_store(struct device *d,
116 struct device_attribute *attr,
117 const char *buf, size_t len)
118{
119 return store_bridge_parm(d, buf, len, set_ageing_time);
120}
121static DEVICE_ATTR_RW(ageing_time);
122
123static ssize_t stp_state_show(struct device *d,
124 struct device_attribute *attr, char *buf)
125{
126 struct net_bridge *br = to_bridge(d);
127 return sprintf(buf, "%d\n", br->stp_enabled);
128}
129
130
131static ssize_t stp_state_store(struct device *d,
132 struct device_attribute *attr, const char *buf,
133 size_t len)
134{
135 struct net_bridge *br = to_bridge(d);
136 char *endp;
137 unsigned long val;
138
139 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
140 return -EPERM;
141
142 val = simple_strtoul(buf, &endp, 0);
143 if (endp == buf)
144 return -EINVAL;
145
146 if (!rtnl_trylock())
147 return restart_syscall();
148 br_stp_set_enabled(br, val);
149 rtnl_unlock();
150
151 return len;
152}
153static DEVICE_ATTR_RW(stp_state);
154
155static ssize_t group_fwd_mask_show(struct device *d,
156 struct device_attribute *attr,
157 char *buf)
158{
159 struct net_bridge *br = to_bridge(d);
160 return sprintf(buf, "%#x\n", br->group_fwd_mask);
161}
162
163
164static ssize_t group_fwd_mask_store(struct device *d,
165 struct device_attribute *attr,
166 const char *buf,
167 size_t len)
168{
169 struct net_bridge *br = to_bridge(d);
170 char *endp;
171 unsigned long val;
172
173 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
174 return -EPERM;
175
176 val = simple_strtoul(buf, &endp, 0);
177 if (endp == buf)
178 return -EINVAL;
179
180 if (val & BR_GROUPFWD_RESTRICTED)
181 return -EINVAL;
182
183 br->group_fwd_mask = val;
184
185 return len;
186}
187static DEVICE_ATTR_RW(group_fwd_mask);
188
189static ssize_t priority_show(struct device *d, struct device_attribute *attr,
190 char *buf)
191{
192 struct net_bridge *br = to_bridge(d);
193 return sprintf(buf, "%d\n",
194 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
195}
196
197static int set_priority(struct net_bridge *br, unsigned long val)
198{
199 br_stp_set_bridge_priority(br, (u16) val);
200 return 0;
201}
202
203static ssize_t priority_store(struct device *d, struct device_attribute *attr,
204 const char *buf, size_t len)
205{
206 return store_bridge_parm(d, buf, len, set_priority);
207}
208static DEVICE_ATTR_RW(priority);
209
210static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
211 char *buf)
212{
213 return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
214}
215static DEVICE_ATTR_RO(root_id);
216
217static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
218 char *buf)
219{
220 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
221}
222static DEVICE_ATTR_RO(bridge_id);
223
224static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
225 char *buf)
226{
227 return sprintf(buf, "%d\n", to_bridge(d)->root_port);
228}
229static DEVICE_ATTR_RO(root_port);
230
231static ssize_t root_path_cost_show(struct device *d,
232 struct device_attribute *attr, char *buf)
233{
234 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
235}
236static DEVICE_ATTR_RO(root_path_cost);
237
238static ssize_t topology_change_show(struct device *d,
239 struct device_attribute *attr, char *buf)
240{
241 return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
242}
243static DEVICE_ATTR_RO(topology_change);
244
245static ssize_t topology_change_detected_show(struct device *d,
246 struct device_attribute *attr,
247 char *buf)
248{
249 struct net_bridge *br = to_bridge(d);
250 return sprintf(buf, "%d\n", br->topology_change_detected);
251}
252static DEVICE_ATTR_RO(topology_change_detected);
253
254static ssize_t hello_timer_show(struct device *d,
255 struct device_attribute *attr, char *buf)
256{
257 struct net_bridge *br = to_bridge(d);
258 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
259}
260static DEVICE_ATTR_RO(hello_timer);
261
262static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
263 char *buf)
264{
265 struct net_bridge *br = to_bridge(d);
266 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
267}
268static DEVICE_ATTR_RO(tcn_timer);
269
270static ssize_t topology_change_timer_show(struct device *d,
271 struct device_attribute *attr,
272 char *buf)
273{
274 struct net_bridge *br = to_bridge(d);
275 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
276}
277static DEVICE_ATTR_RO(topology_change_timer);
278
279static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
280 char *buf)
281{
282 struct net_bridge *br = to_bridge(d);
283 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
284}
285static DEVICE_ATTR_RO(gc_timer);
286
287static ssize_t group_addr_show(struct device *d,
288 struct device_attribute *attr, char *buf)
289{
290 struct net_bridge *br = to_bridge(d);
291 return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
292 br->group_addr[0], br->group_addr[1],
293 br->group_addr[2], br->group_addr[3],
294 br->group_addr[4], br->group_addr[5]);
295}
296
297static ssize_t group_addr_store(struct device *d,
298 struct device_attribute *attr,
299 const char *buf, size_t len)
300{
301 struct net_bridge *br = to_bridge(d);
302 u8 new_addr[6];
303 int i;
304
305 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
306 return -EPERM;
307
308 if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
309 &new_addr[0], &new_addr[1], &new_addr[2],
310 &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
311 return -EINVAL;
312
313 if (!is_link_local_ether_addr(new_addr))
314 return -EINVAL;
315
316 if (new_addr[5] == 1 || /* 802.3x Pause address */
317 new_addr[5] == 2 || /* 802.3ad Slow protocols */
318 new_addr[5] == 3) /* 802.1X PAE address */
319 return -EINVAL;
320
321 if (!rtnl_trylock())
322 return restart_syscall();
323
324 spin_lock_bh(&br->lock);
325 for (i = 0; i < 6; i++)
326 br->group_addr[i] = new_addr[i];
327 spin_unlock_bh(&br->lock);
328
329 br->group_addr_set = true;
330 br_recalculate_fwd_mask(br);
331
332 rtnl_unlock();
333
334 return len;
335}
336
337static DEVICE_ATTR_RW(group_addr);
338
339static ssize_t flush_store(struct device *d,
340 struct device_attribute *attr,
341 const char *buf, size_t len)
342{
343 struct net_bridge *br = to_bridge(d);
344
345 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
346 return -EPERM;
347
348 br_fdb_flush(br);
349 return len;
350}
351static DEVICE_ATTR_WO(flush);
352
353#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
354static ssize_t multicast_router_show(struct device *d,
355 struct device_attribute *attr, char *buf)
356{
357 struct net_bridge *br = to_bridge(d);
358 return sprintf(buf, "%d\n", br->multicast_router);
359}
360
361static ssize_t multicast_router_store(struct device *d,
362 struct device_attribute *attr,
363 const char *buf, size_t len)
364{
365 return store_bridge_parm(d, buf, len, br_multicast_set_router);
366}
367static DEVICE_ATTR_RW(multicast_router);
368
369static ssize_t multicast_snooping_show(struct device *d,
370 struct device_attribute *attr,
371 char *buf)
372{
373 struct net_bridge *br = to_bridge(d);
374 return sprintf(buf, "%d\n", !br->multicast_disabled);
375}
376
377static ssize_t multicast_snooping_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, br_multicast_toggle);
382}
383static DEVICE_ATTR_RW(multicast_snooping);
384
385static ssize_t multicast_query_use_ifaddr_show(struct device *d,
386 struct device_attribute *attr,
387 char *buf)
388{
389 struct net_bridge *br = to_bridge(d);
390 return sprintf(buf, "%d\n", br->multicast_query_use_ifaddr);
391}
392
393static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
394{
395 br->multicast_query_use_ifaddr = !!val;
396 return 0;
397}
398
399static ssize_t
400multicast_query_use_ifaddr_store(struct device *d,
401 struct device_attribute *attr,
402 const char *buf, size_t len)
403{
404 return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
405}
406static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
407
408static ssize_t multicast_querier_show(struct device *d,
409 struct device_attribute *attr,
410 char *buf)
411{
412 struct net_bridge *br = to_bridge(d);
413 return sprintf(buf, "%d\n", br->multicast_querier);
414}
415
416static ssize_t multicast_querier_store(struct device *d,
417 struct device_attribute *attr,
418 const char *buf, size_t len)
419{
420 return store_bridge_parm(d, buf, len, br_multicast_set_querier);
421}
422static DEVICE_ATTR_RW(multicast_querier);
423
424static ssize_t hash_elasticity_show(struct device *d,
425 struct device_attribute *attr, char *buf)
426{
427 struct net_bridge *br = to_bridge(d);
428 return sprintf(buf, "%u\n", br->hash_elasticity);
429}
430
431static int set_elasticity(struct net_bridge *br, unsigned long val)
432{
433 br->hash_elasticity = val;
434 return 0;
435}
436
437static ssize_t hash_elasticity_store(struct device *d,
438 struct device_attribute *attr,
439 const char *buf, size_t len)
440{
441 return store_bridge_parm(d, buf, len, set_elasticity);
442}
443static DEVICE_ATTR_RW(hash_elasticity);
444
445static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
446 char *buf)
447{
448 struct net_bridge *br = to_bridge(d);
449 return sprintf(buf, "%u\n", br->hash_max);
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, br_multicast_set_hash_max);
456}
457static DEVICE_ATTR_RW(hash_max);
458
459static ssize_t multicast_last_member_count_show(struct device *d,
460 struct device_attribute *attr,
461 char *buf)
462{
463 struct net_bridge *br = to_bridge(d);
464 return sprintf(buf, "%u\n", br->multicast_last_member_count);
465}
466
467static int set_last_member_count(struct net_bridge *br, unsigned long val)
468{
469 br->multicast_last_member_count = val;
470 return 0;
471}
472
473static ssize_t multicast_last_member_count_store(struct device *d,
474 struct device_attribute *attr,
475 const char *buf, size_t len)
476{
477 return store_bridge_parm(d, buf, len, set_last_member_count);
478}
479static DEVICE_ATTR_RW(multicast_last_member_count);
480
481static ssize_t multicast_startup_query_count_show(
482 struct device *d, struct device_attribute *attr, char *buf)
483{
484 struct net_bridge *br = to_bridge(d);
485 return sprintf(buf, "%u\n", br->multicast_startup_query_count);
486}
487
488static int set_startup_query_count(struct net_bridge *br, unsigned long val)
489{
490 br->multicast_startup_query_count = val;
491 return 0;
492}
493
494static ssize_t multicast_startup_query_count_store(
495 struct device *d, struct device_attribute *attr, const char *buf,
496 size_t len)
497{
498 return store_bridge_parm(d, buf, len, set_startup_query_count);
499}
500static DEVICE_ATTR_RW(multicast_startup_query_count);
501
502static ssize_t multicast_last_member_interval_show(
503 struct device *d, struct device_attribute *attr, char *buf)
504{
505 struct net_bridge *br = to_bridge(d);
506 return sprintf(buf, "%lu\n",
507 jiffies_to_clock_t(br->multicast_last_member_interval));
508}
509
510static int set_last_member_interval(struct net_bridge *br, unsigned long val)
511{
512 br->multicast_last_member_interval = clock_t_to_jiffies(val);
513 return 0;
514}
515
516static ssize_t multicast_last_member_interval_store(
517 struct device *d, struct device_attribute *attr, const char *buf,
518 size_t len)
519{
520 return store_bridge_parm(d, buf, len, set_last_member_interval);
521}
522static DEVICE_ATTR_RW(multicast_last_member_interval);
523
524static ssize_t multicast_membership_interval_show(
525 struct device *d, struct device_attribute *attr, char *buf)
526{
527 struct net_bridge *br = to_bridge(d);
528 return sprintf(buf, "%lu\n",
529 jiffies_to_clock_t(br->multicast_membership_interval));
530}
531
532static int set_membership_interval(struct net_bridge *br, unsigned long val)
533{
534 br->multicast_membership_interval = clock_t_to_jiffies(val);
535 return 0;
536}
537
538static ssize_t multicast_membership_interval_store(
539 struct device *d, struct device_attribute *attr, const char *buf,
540 size_t len)
541{
542 return store_bridge_parm(d, buf, len, set_membership_interval);
543}
544static DEVICE_ATTR_RW(multicast_membership_interval);
545
546static ssize_t multicast_querier_interval_show(struct device *d,
547 struct device_attribute *attr,
548 char *buf)
549{
550 struct net_bridge *br = to_bridge(d);
551 return sprintf(buf, "%lu\n",
552 jiffies_to_clock_t(br->multicast_querier_interval));
553}
554
555static int set_querier_interval(struct net_bridge *br, unsigned long val)
556{
557 br->multicast_querier_interval = clock_t_to_jiffies(val);
558 return 0;
559}
560
561static ssize_t multicast_querier_interval_store(struct device *d,
562 struct device_attribute *attr,
563 const char *buf, size_t len)
564{
565 return store_bridge_parm(d, buf, len, set_querier_interval);
566}
567static DEVICE_ATTR_RW(multicast_querier_interval);
568
569static ssize_t multicast_query_interval_show(struct device *d,
570 struct device_attribute *attr,
571 char *buf)
572{
573 struct net_bridge *br = to_bridge(d);
574 return sprintf(buf, "%lu\n",
575 jiffies_to_clock_t(br->multicast_query_interval));
576}
577
578static int set_query_interval(struct net_bridge *br, unsigned long val)
579{
580 br->multicast_query_interval = clock_t_to_jiffies(val);
581 return 0;
582}
583
584static ssize_t multicast_query_interval_store(struct device *d,
585 struct device_attribute *attr,
586 const char *buf, size_t len)
587{
588 return store_bridge_parm(d, buf, len, set_query_interval);
589}
590static DEVICE_ATTR_RW(multicast_query_interval);
591
592static ssize_t multicast_query_response_interval_show(
593 struct device *d, struct device_attribute *attr, char *buf)
594{
595 struct net_bridge *br = to_bridge(d);
596 return sprintf(
597 buf, "%lu\n",
598 jiffies_to_clock_t(br->multicast_query_response_interval));
599}
600
601static int set_query_response_interval(struct net_bridge *br, unsigned long val)
602{
603 br->multicast_query_response_interval = clock_t_to_jiffies(val);
604 return 0;
605}
606
607static ssize_t multicast_query_response_interval_store(
608 struct device *d, struct device_attribute *attr, const char *buf,
609 size_t len)
610{
611 return store_bridge_parm(d, buf, len, set_query_response_interval);
612}
613static DEVICE_ATTR_RW(multicast_query_response_interval);
614
615static ssize_t multicast_startup_query_interval_show(
616 struct device *d, struct device_attribute *attr, char *buf)
617{
618 struct net_bridge *br = to_bridge(d);
619 return sprintf(
620 buf, "%lu\n",
621 jiffies_to_clock_t(br->multicast_startup_query_interval));
622}
623
624static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
625{
626 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
627 return 0;
628}
629
630static ssize_t multicast_startup_query_interval_store(
631 struct device *d, struct device_attribute *attr, const char *buf,
632 size_t len)
633{
634 return store_bridge_parm(d, buf, len, set_startup_query_interval);
635}
636static DEVICE_ATTR_RW(multicast_startup_query_interval);
637#endif
638#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
639static ssize_t nf_call_iptables_show(
640 struct device *d, struct device_attribute *attr, char *buf)
641{
642 struct net_bridge *br = to_bridge(d);
643 return sprintf(buf, "%u\n", br->nf_call_iptables);
644}
645
646static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
647{
648 br->nf_call_iptables = val ? true : false;
649 return 0;
650}
651
652static ssize_t nf_call_iptables_store(
653 struct device *d, struct device_attribute *attr, const char *buf,
654 size_t len)
655{
656 return store_bridge_parm(d, buf, len, set_nf_call_iptables);
657}
658static DEVICE_ATTR_RW(nf_call_iptables);
659
660static ssize_t nf_call_ip6tables_show(
661 struct device *d, struct device_attribute *attr, char *buf)
662{
663 struct net_bridge *br = to_bridge(d);
664 return sprintf(buf, "%u\n", br->nf_call_ip6tables);
665}
666
667static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
668{
669 br->nf_call_ip6tables = val ? true : false;
670 return 0;
671}
672
673static ssize_t nf_call_ip6tables_store(
674 struct device *d, struct device_attribute *attr, const char *buf,
675 size_t len)
676{
677 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
678}
679static DEVICE_ATTR_RW(nf_call_ip6tables);
680
681static ssize_t nf_call_arptables_show(
682 struct device *d, struct device_attribute *attr, char *buf)
683{
684 struct net_bridge *br = to_bridge(d);
685 return sprintf(buf, "%u\n", br->nf_call_arptables);
686}
687
688static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
689{
690 br->nf_call_arptables = val ? true : false;
691 return 0;
692}
693
694static ssize_t nf_call_arptables_store(
695 struct device *d, struct device_attribute *attr, const char *buf,
696 size_t len)
697{
698 return store_bridge_parm(d, buf, len, set_nf_call_arptables);
699}
700static DEVICE_ATTR_RW(nf_call_arptables);
701#endif
702#ifdef CONFIG_BRIDGE_VLAN_FILTERING
703static ssize_t vlan_filtering_show(struct device *d,
704 struct device_attribute *attr,
705 char *buf)
706{
707 struct net_bridge *br = to_bridge(d);
708 return sprintf(buf, "%d\n", br->vlan_enabled);
709}
710
711static ssize_t vlan_filtering_store(struct device *d,
712 struct device_attribute *attr,
713 const char *buf, size_t len)
714{
715 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
716}
717static DEVICE_ATTR_RW(vlan_filtering);
718
719static ssize_t vlan_protocol_show(struct device *d,
720 struct device_attribute *attr,
721 char *buf)
722{
723 struct net_bridge *br = to_bridge(d);
724 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
725}
726
727static ssize_t vlan_protocol_store(struct device *d,
728 struct device_attribute *attr,
729 const char *buf, size_t len)
730{
731 return store_bridge_parm(d, buf, len, br_vlan_set_proto);
732}
733static DEVICE_ATTR_RW(vlan_protocol);
734
735static ssize_t default_pvid_show(struct device *d,
736 struct device_attribute *attr,
737 char *buf)
738{
739 struct net_bridge *br = to_bridge(d);
740 return sprintf(buf, "%d\n", br->default_pvid);
741}
742
743static ssize_t default_pvid_store(struct device *d,
744 struct device_attribute *attr,
745 const char *buf, size_t len)
746{
747 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
748}
749static DEVICE_ATTR_RW(default_pvid);
750#endif
751
752static struct attribute *bridge_attrs[] = {
753 &dev_attr_forward_delay.attr,
754 &dev_attr_hello_time.attr,
755 &dev_attr_max_age.attr,
756 &dev_attr_ageing_time.attr,
757 &dev_attr_stp_state.attr,
758 &dev_attr_group_fwd_mask.attr,
759 &dev_attr_priority.attr,
760 &dev_attr_bridge_id.attr,
761 &dev_attr_root_id.attr,
762 &dev_attr_root_path_cost.attr,
763 &dev_attr_root_port.attr,
764 &dev_attr_topology_change.attr,
765 &dev_attr_topology_change_detected.attr,
766 &dev_attr_hello_timer.attr,
767 &dev_attr_tcn_timer.attr,
768 &dev_attr_topology_change_timer.attr,
769 &dev_attr_gc_timer.attr,
770 &dev_attr_group_addr.attr,
771 &dev_attr_flush.attr,
772#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
773 &dev_attr_multicast_router.attr,
774 &dev_attr_multicast_snooping.attr,
775 &dev_attr_multicast_querier.attr,
776 &dev_attr_multicast_query_use_ifaddr.attr,
777 &dev_attr_hash_elasticity.attr,
778 &dev_attr_hash_max.attr,
779 &dev_attr_multicast_last_member_count.attr,
780 &dev_attr_multicast_startup_query_count.attr,
781 &dev_attr_multicast_last_member_interval.attr,
782 &dev_attr_multicast_membership_interval.attr,
783 &dev_attr_multicast_querier_interval.attr,
784 &dev_attr_multicast_query_interval.attr,
785 &dev_attr_multicast_query_response_interval.attr,
786 &dev_attr_multicast_startup_query_interval.attr,
787#endif
788#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
789 &dev_attr_nf_call_iptables.attr,
790 &dev_attr_nf_call_ip6tables.attr,
791 &dev_attr_nf_call_arptables.attr,
792#endif
793#ifdef CONFIG_BRIDGE_VLAN_FILTERING
794 &dev_attr_vlan_filtering.attr,
795 &dev_attr_vlan_protocol.attr,
796 &dev_attr_default_pvid.attr,
797#endif
798 NULL
799};
800
801static struct attribute_group bridge_group = {
802 .name = SYSFS_BRIDGE_ATTR,
803 .attrs = bridge_attrs,
804};
805
806/*
807 * Export the forwarding information table as a binary file
808 * The records are struct __fdb_entry.
809 *
810 * Returns the number of bytes read.
811 */
812static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
813 struct bin_attribute *bin_attr,
814 char *buf, loff_t off, size_t count)
815{
816 struct device *dev = kobj_to_dev(kobj);
817 struct net_bridge *br = to_bridge(dev);
818 int n;
819
820 /* must read whole records */
821 if (off % sizeof(struct __fdb_entry) != 0)
822 return -EINVAL;
823
824 n = br_fdb_fillbuf(br, buf,
825 count / sizeof(struct __fdb_entry),
826 off / sizeof(struct __fdb_entry));
827
828 if (n > 0)
829 n *= sizeof(struct __fdb_entry);
830
831 return n;
832}
833
834static struct bin_attribute bridge_forward = {
835 .attr = { .name = SYSFS_BRIDGE_FDB,
836 .mode = S_IRUGO, },
837 .read = brforward_read,
838};
839
840/*
841 * Add entries in sysfs onto the existing network class device
842 * for the bridge.
843 * Adds a attribute group "bridge" containing tuning parameters.
844 * Binary attribute containing the forward table
845 * Sub directory to hold links to interfaces.
846 *
847 * Note: the ifobj exists only to be a subdirectory
848 * to hold links. The ifobj exists in same data structure
849 * as it's parent the bridge so reference counting works.
850 */
851int br_sysfs_addbr(struct net_device *dev)
852{
853 struct kobject *brobj = &dev->dev.kobj;
854 struct net_bridge *br = netdev_priv(dev);
855 int err;
856
857 err = sysfs_create_group(brobj, &bridge_group);
858 if (err) {
859 pr_info("%s: can't create group %s/%s\n",
860 __func__, dev->name, bridge_group.name);
861 goto out1;
862 }
863
864 err = sysfs_create_bin_file(brobj, &bridge_forward);
865 if (err) {
866 pr_info("%s: can't create attribute file %s/%s\n",
867 __func__, dev->name, bridge_forward.attr.name);
868 goto out2;
869 }
870
871 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
872 if (!br->ifobj) {
873 pr_info("%s: can't add kobject (directory) %s/%s\n",
874 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
875 goto out3;
876 }
877 return 0;
878 out3:
879 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
880 out2:
881 sysfs_remove_group(&dev->dev.kobj, &bridge_group);
882 out1:
883 return err;
884
885}
886
887void br_sysfs_delbr(struct net_device *dev)
888{
889 struct kobject *kobj = &dev->dev.kobj;
890 struct net_bridge *br = netdev_priv(dev);
891
892 kobject_put(br->ifobj);
893 sysfs_remove_bin_file(kobj, &bridge_forward);
894 sysfs_remove_group(kobj, &bridge_group);
895}
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}