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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#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}