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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 */
30 static 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 if (!rtnl_trylock())
47 return restart_syscall();
48
49 err = (*set)(br, val);
50 if (!err)
51 netdev_state_change(br->dev);
52 rtnl_unlock();
53
54 return err ? err : len;
55 }
56
57
58 static ssize_t forward_delay_show(struct device *d,
59 struct device_attribute *attr, char *buf)
60 {
61 struct net_bridge *br = to_bridge(d);
62 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
63 }
64
65 static ssize_t forward_delay_store(struct device *d,
66 struct device_attribute *attr,
67 const char *buf, size_t len)
68 {
69 return store_bridge_parm(d, buf, len, br_set_forward_delay);
70 }
71 static DEVICE_ATTR_RW(forward_delay);
72
73 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
74 char *buf)
75 {
76 return sprintf(buf, "%lu\n",
77 jiffies_to_clock_t(to_bridge(d)->hello_time));
78 }
79
80 static ssize_t hello_time_store(struct device *d,
81 struct device_attribute *attr, const char *buf,
82 size_t len)
83 {
84 return store_bridge_parm(d, buf, len, br_set_hello_time);
85 }
86 static DEVICE_ATTR_RW(hello_time);
87
88 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
89 char *buf)
90 {
91 return sprintf(buf, "%lu\n",
92 jiffies_to_clock_t(to_bridge(d)->max_age));
93 }
94
95 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
96 const char *buf, size_t len)
97 {
98 return store_bridge_parm(d, buf, len, br_set_max_age);
99 }
100 static DEVICE_ATTR_RW(max_age);
101
102 static ssize_t ageing_time_show(struct device *d,
103 struct device_attribute *attr, char *buf)
104 {
105 struct net_bridge *br = to_bridge(d);
106 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
107 }
108
109 static int set_ageing_time(struct net_bridge *br, unsigned long val)
110 {
111 return br_set_ageing_time(br, val);
112 }
113
114 static ssize_t ageing_time_store(struct device *d,
115 struct device_attribute *attr,
116 const char *buf, size_t len)
117 {
118 return store_bridge_parm(d, buf, len, set_ageing_time);
119 }
120 static DEVICE_ATTR_RW(ageing_time);
121
122 static ssize_t stp_state_show(struct device *d,
123 struct device_attribute *attr, char *buf)
124 {
125 struct net_bridge *br = to_bridge(d);
126 return sprintf(buf, "%d\n", br->stp_enabled);
127 }
128
129
130 static int set_stp_state(struct net_bridge *br, unsigned long val)
131 {
132 br_stp_set_enabled(br, val);
133
134 return 0;
135 }
136
137 static ssize_t stp_state_store(struct device *d,
138 struct device_attribute *attr, const char *buf,
139 size_t len)
140 {
141 return store_bridge_parm(d, buf, len, set_stp_state);
142 }
143 static DEVICE_ATTR_RW(stp_state);
144
145 static ssize_t group_fwd_mask_show(struct device *d,
146 struct device_attribute *attr,
147 char *buf)
148 {
149 struct net_bridge *br = to_bridge(d);
150 return sprintf(buf, "%#x\n", br->group_fwd_mask);
151 }
152
153 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val)
154 {
155 if (val & BR_GROUPFWD_RESTRICTED)
156 return -EINVAL;
157
158 br->group_fwd_mask = val;
159
160 return 0;
161 }
162
163 static ssize_t group_fwd_mask_store(struct device *d,
164 struct device_attribute *attr,
165 const char *buf,
166 size_t len)
167 {
168 return store_bridge_parm(d, buf, len, set_group_fwd_mask);
169 }
170 static DEVICE_ATTR_RW(group_fwd_mask);
171
172 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
173 char *buf)
174 {
175 struct net_bridge *br = to_bridge(d);
176 return sprintf(buf, "%d\n",
177 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
178 }
179
180 static int set_priority(struct net_bridge *br, unsigned long val)
181 {
182 br_stp_set_bridge_priority(br, (u16) val);
183 return 0;
184 }
185
186 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
187 const char *buf, size_t len)
188 {
189 return store_bridge_parm(d, buf, len, set_priority);
190 }
191 static DEVICE_ATTR_RW(priority);
192
193 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
194 char *buf)
195 {
196 return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
197 }
198 static DEVICE_ATTR_RO(root_id);
199
200 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
201 char *buf)
202 {
203 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
204 }
205 static DEVICE_ATTR_RO(bridge_id);
206
207 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
208 char *buf)
209 {
210 return sprintf(buf, "%d\n", to_bridge(d)->root_port);
211 }
212 static DEVICE_ATTR_RO(root_port);
213
214 static ssize_t root_path_cost_show(struct device *d,
215 struct device_attribute *attr, char *buf)
216 {
217 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
218 }
219 static DEVICE_ATTR_RO(root_path_cost);
220
221 static ssize_t topology_change_show(struct device *d,
222 struct device_attribute *attr, char *buf)
223 {
224 return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
225 }
226 static DEVICE_ATTR_RO(topology_change);
227
228 static ssize_t topology_change_detected_show(struct device *d,
229 struct device_attribute *attr,
230 char *buf)
231 {
232 struct net_bridge *br = to_bridge(d);
233 return sprintf(buf, "%d\n", br->topology_change_detected);
234 }
235 static DEVICE_ATTR_RO(topology_change_detected);
236
237 static ssize_t hello_timer_show(struct device *d,
238 struct device_attribute *attr, char *buf)
239 {
240 struct net_bridge *br = to_bridge(d);
241 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
242 }
243 static DEVICE_ATTR_RO(hello_timer);
244
245 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
246 char *buf)
247 {
248 struct net_bridge *br = to_bridge(d);
249 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
250 }
251 static DEVICE_ATTR_RO(tcn_timer);
252
253 static ssize_t topology_change_timer_show(struct device *d,
254 struct device_attribute *attr,
255 char *buf)
256 {
257 struct net_bridge *br = to_bridge(d);
258 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
259 }
260 static DEVICE_ATTR_RO(topology_change_timer);
261
262 static ssize_t gc_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->gc_timer));
267 }
268 static DEVICE_ATTR_RO(gc_timer);
269
270 static ssize_t group_addr_show(struct device *d,
271 struct device_attribute *attr, char *buf)
272 {
273 struct net_bridge *br = to_bridge(d);
274 return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
275 br->group_addr[0], br->group_addr[1],
276 br->group_addr[2], br->group_addr[3],
277 br->group_addr[4], br->group_addr[5]);
278 }
279
280 static ssize_t group_addr_store(struct device *d,
281 struct device_attribute *attr,
282 const char *buf, size_t len)
283 {
284 struct net_bridge *br = to_bridge(d);
285 u8 new_addr[6];
286 int i;
287
288 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
289 return -EPERM;
290
291 if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
292 &new_addr[0], &new_addr[1], &new_addr[2],
293 &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
294 return -EINVAL;
295
296 if (!is_link_local_ether_addr(new_addr))
297 return -EINVAL;
298
299 if (new_addr[5] == 1 || /* 802.3x Pause address */
300 new_addr[5] == 2 || /* 802.3ad Slow protocols */
301 new_addr[5] == 3) /* 802.1X PAE address */
302 return -EINVAL;
303
304 if (!rtnl_trylock())
305 return restart_syscall();
306
307 spin_lock_bh(&br->lock);
308 for (i = 0; i < 6; i++)
309 br->group_addr[i] = new_addr[i];
310 spin_unlock_bh(&br->lock);
311
312 br->group_addr_set = true;
313 br_recalculate_fwd_mask(br);
314 netdev_state_change(br->dev);
315
316 rtnl_unlock();
317
318 return len;
319 }
320
321 static DEVICE_ATTR_RW(group_addr);
322
323 static int set_flush(struct net_bridge *br, unsigned long val)
324 {
325 br_fdb_flush(br);
326 return 0;
327 }
328
329 static ssize_t flush_store(struct device *d,
330 struct device_attribute *attr,
331 const char *buf, size_t len)
332 {
333 return store_bridge_parm(d, buf, len, set_flush);
334 }
335 static DEVICE_ATTR_WO(flush);
336
337 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
338 static ssize_t multicast_router_show(struct device *d,
339 struct device_attribute *attr, char *buf)
340 {
341 struct net_bridge *br = to_bridge(d);
342 return sprintf(buf, "%d\n", br->multicast_router);
343 }
344
345 static ssize_t multicast_router_store(struct device *d,
346 struct device_attribute *attr,
347 const char *buf, size_t len)
348 {
349 return store_bridge_parm(d, buf, len, br_multicast_set_router);
350 }
351 static DEVICE_ATTR_RW(multicast_router);
352
353 static ssize_t multicast_snooping_show(struct device *d,
354 struct device_attribute *attr,
355 char *buf)
356 {
357 struct net_bridge *br = to_bridge(d);
358 return sprintf(buf, "%d\n", !br->multicast_disabled);
359 }
360
361 static ssize_t multicast_snooping_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_toggle);
366 }
367 static DEVICE_ATTR_RW(multicast_snooping);
368
369 static ssize_t multicast_query_use_ifaddr_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_query_use_ifaddr);
375 }
376
377 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
378 {
379 br->multicast_query_use_ifaddr = !!val;
380 return 0;
381 }
382
383 static ssize_t
384 multicast_query_use_ifaddr_store(struct device *d,
385 struct device_attribute *attr,
386 const char *buf, size_t len)
387 {
388 return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
389 }
390 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
391
392 static ssize_t multicast_querier_show(struct device *d,
393 struct device_attribute *attr,
394 char *buf)
395 {
396 struct net_bridge *br = to_bridge(d);
397 return sprintf(buf, "%d\n", br->multicast_querier);
398 }
399
400 static ssize_t multicast_querier_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, br_multicast_set_querier);
405 }
406 static DEVICE_ATTR_RW(multicast_querier);
407
408 static ssize_t hash_elasticity_show(struct device *d,
409 struct device_attribute *attr, char *buf)
410 {
411 struct net_bridge *br = to_bridge(d);
412 return sprintf(buf, "%u\n", br->hash_elasticity);
413 }
414
415 static int set_elasticity(struct net_bridge *br, unsigned long val)
416 {
417 br->hash_elasticity = val;
418 return 0;
419 }
420
421 static ssize_t hash_elasticity_store(struct device *d,
422 struct device_attribute *attr,
423 const char *buf, size_t len)
424 {
425 return store_bridge_parm(d, buf, len, set_elasticity);
426 }
427 static DEVICE_ATTR_RW(hash_elasticity);
428
429 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
430 char *buf)
431 {
432 struct net_bridge *br = to_bridge(d);
433 return sprintf(buf, "%u\n", br->hash_max);
434 }
435
436 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
437 const char *buf, size_t len)
438 {
439 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
440 }
441 static DEVICE_ATTR_RW(hash_max);
442
443 static ssize_t multicast_last_member_count_show(struct device *d,
444 struct device_attribute *attr,
445 char *buf)
446 {
447 struct net_bridge *br = to_bridge(d);
448 return sprintf(buf, "%u\n", br->multicast_last_member_count);
449 }
450
451 static int set_last_member_count(struct net_bridge *br, unsigned long val)
452 {
453 br->multicast_last_member_count = val;
454 return 0;
455 }
456
457 static ssize_t multicast_last_member_count_store(struct device *d,
458 struct device_attribute *attr,
459 const char *buf, size_t len)
460 {
461 return store_bridge_parm(d, buf, len, set_last_member_count);
462 }
463 static DEVICE_ATTR_RW(multicast_last_member_count);
464
465 static ssize_t multicast_startup_query_count_show(
466 struct device *d, struct device_attribute *attr, char *buf)
467 {
468 struct net_bridge *br = to_bridge(d);
469 return sprintf(buf, "%u\n", br->multicast_startup_query_count);
470 }
471
472 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
473 {
474 br->multicast_startup_query_count = val;
475 return 0;
476 }
477
478 static ssize_t multicast_startup_query_count_store(
479 struct device *d, struct device_attribute *attr, const char *buf,
480 size_t len)
481 {
482 return store_bridge_parm(d, buf, len, set_startup_query_count);
483 }
484 static DEVICE_ATTR_RW(multicast_startup_query_count);
485
486 static ssize_t multicast_last_member_interval_show(
487 struct device *d, struct device_attribute *attr, char *buf)
488 {
489 struct net_bridge *br = to_bridge(d);
490 return sprintf(buf, "%lu\n",
491 jiffies_to_clock_t(br->multicast_last_member_interval));
492 }
493
494 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
495 {
496 br->multicast_last_member_interval = clock_t_to_jiffies(val);
497 return 0;
498 }
499
500 static ssize_t multicast_last_member_interval_store(
501 struct device *d, struct device_attribute *attr, const char *buf,
502 size_t len)
503 {
504 return store_bridge_parm(d, buf, len, set_last_member_interval);
505 }
506 static DEVICE_ATTR_RW(multicast_last_member_interval);
507
508 static ssize_t multicast_membership_interval_show(
509 struct device *d, struct device_attribute *attr, char *buf)
510 {
511 struct net_bridge *br = to_bridge(d);
512 return sprintf(buf, "%lu\n",
513 jiffies_to_clock_t(br->multicast_membership_interval));
514 }
515
516 static int set_membership_interval(struct net_bridge *br, unsigned long val)
517 {
518 br->multicast_membership_interval = clock_t_to_jiffies(val);
519 return 0;
520 }
521
522 static ssize_t multicast_membership_interval_store(
523 struct device *d, struct device_attribute *attr, const char *buf,
524 size_t len)
525 {
526 return store_bridge_parm(d, buf, len, set_membership_interval);
527 }
528 static DEVICE_ATTR_RW(multicast_membership_interval);
529
530 static ssize_t multicast_querier_interval_show(struct device *d,
531 struct device_attribute *attr,
532 char *buf)
533 {
534 struct net_bridge *br = to_bridge(d);
535 return sprintf(buf, "%lu\n",
536 jiffies_to_clock_t(br->multicast_querier_interval));
537 }
538
539 static int set_querier_interval(struct net_bridge *br, unsigned long val)
540 {
541 br->multicast_querier_interval = clock_t_to_jiffies(val);
542 return 0;
543 }
544
545 static ssize_t multicast_querier_interval_store(struct device *d,
546 struct device_attribute *attr,
547 const char *buf, size_t len)
548 {
549 return store_bridge_parm(d, buf, len, set_querier_interval);
550 }
551 static DEVICE_ATTR_RW(multicast_querier_interval);
552
553 static ssize_t multicast_query_interval_show(struct device *d,
554 struct device_attribute *attr,
555 char *buf)
556 {
557 struct net_bridge *br = to_bridge(d);
558 return sprintf(buf, "%lu\n",
559 jiffies_to_clock_t(br->multicast_query_interval));
560 }
561
562 static int set_query_interval(struct net_bridge *br, unsigned long val)
563 {
564 br->multicast_query_interval = clock_t_to_jiffies(val);
565 return 0;
566 }
567
568 static ssize_t multicast_query_interval_store(struct device *d,
569 struct device_attribute *attr,
570 const char *buf, size_t len)
571 {
572 return store_bridge_parm(d, buf, len, set_query_interval);
573 }
574 static DEVICE_ATTR_RW(multicast_query_interval);
575
576 static ssize_t multicast_query_response_interval_show(
577 struct device *d, struct device_attribute *attr, char *buf)
578 {
579 struct net_bridge *br = to_bridge(d);
580 return sprintf(
581 buf, "%lu\n",
582 jiffies_to_clock_t(br->multicast_query_response_interval));
583 }
584
585 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
586 {
587 br->multicast_query_response_interval = clock_t_to_jiffies(val);
588 return 0;
589 }
590
591 static ssize_t multicast_query_response_interval_store(
592 struct device *d, struct device_attribute *attr, const char *buf,
593 size_t len)
594 {
595 return store_bridge_parm(d, buf, len, set_query_response_interval);
596 }
597 static DEVICE_ATTR_RW(multicast_query_response_interval);
598
599 static ssize_t multicast_startup_query_interval_show(
600 struct device *d, struct device_attribute *attr, char *buf)
601 {
602 struct net_bridge *br = to_bridge(d);
603 return sprintf(
604 buf, "%lu\n",
605 jiffies_to_clock_t(br->multicast_startup_query_interval));
606 }
607
608 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
609 {
610 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
611 return 0;
612 }
613
614 static ssize_t multicast_startup_query_interval_store(
615 struct device *d, struct device_attribute *attr, const char *buf,
616 size_t len)
617 {
618 return store_bridge_parm(d, buf, len, set_startup_query_interval);
619 }
620 static DEVICE_ATTR_RW(multicast_startup_query_interval);
621
622 static ssize_t multicast_stats_enabled_show(struct device *d,
623 struct device_attribute *attr,
624 char *buf)
625 {
626 struct net_bridge *br = to_bridge(d);
627
628 return sprintf(buf, "%u\n", br->multicast_stats_enabled);
629 }
630
631 static int set_stats_enabled(struct net_bridge *br, unsigned long val)
632 {
633 br->multicast_stats_enabled = !!val;
634 return 0;
635 }
636
637 static ssize_t multicast_stats_enabled_store(struct device *d,
638 struct device_attribute *attr,
639 const char *buf,
640 size_t len)
641 {
642 return store_bridge_parm(d, buf, len, set_stats_enabled);
643 }
644 static DEVICE_ATTR_RW(multicast_stats_enabled);
645 #endif
646 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
647 static ssize_t nf_call_iptables_show(
648 struct device *d, struct device_attribute *attr, char *buf)
649 {
650 struct net_bridge *br = to_bridge(d);
651 return sprintf(buf, "%u\n", br->nf_call_iptables);
652 }
653
654 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
655 {
656 br->nf_call_iptables = val ? true : false;
657 return 0;
658 }
659
660 static ssize_t nf_call_iptables_store(
661 struct device *d, struct device_attribute *attr, const char *buf,
662 size_t len)
663 {
664 return store_bridge_parm(d, buf, len, set_nf_call_iptables);
665 }
666 static DEVICE_ATTR_RW(nf_call_iptables);
667
668 static ssize_t nf_call_ip6tables_show(
669 struct device *d, struct device_attribute *attr, char *buf)
670 {
671 struct net_bridge *br = to_bridge(d);
672 return sprintf(buf, "%u\n", br->nf_call_ip6tables);
673 }
674
675 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
676 {
677 br->nf_call_ip6tables = val ? true : false;
678 return 0;
679 }
680
681 static ssize_t nf_call_ip6tables_store(
682 struct device *d, struct device_attribute *attr, const char *buf,
683 size_t len)
684 {
685 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
686 }
687 static DEVICE_ATTR_RW(nf_call_ip6tables);
688
689 static ssize_t nf_call_arptables_show(
690 struct device *d, struct device_attribute *attr, char *buf)
691 {
692 struct net_bridge *br = to_bridge(d);
693 return sprintf(buf, "%u\n", br->nf_call_arptables);
694 }
695
696 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
697 {
698 br->nf_call_arptables = val ? true : false;
699 return 0;
700 }
701
702 static ssize_t nf_call_arptables_store(
703 struct device *d, struct device_attribute *attr, const char *buf,
704 size_t len)
705 {
706 return store_bridge_parm(d, buf, len, set_nf_call_arptables);
707 }
708 static DEVICE_ATTR_RW(nf_call_arptables);
709 #endif
710 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
711 static ssize_t vlan_filtering_show(struct device *d,
712 struct device_attribute *attr,
713 char *buf)
714 {
715 struct net_bridge *br = to_bridge(d);
716 return sprintf(buf, "%d\n", br->vlan_enabled);
717 }
718
719 static ssize_t vlan_filtering_store(struct device *d,
720 struct device_attribute *attr,
721 const char *buf, size_t len)
722 {
723 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
724 }
725 static DEVICE_ATTR_RW(vlan_filtering);
726
727 static ssize_t vlan_protocol_show(struct device *d,
728 struct device_attribute *attr,
729 char *buf)
730 {
731 struct net_bridge *br = to_bridge(d);
732 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
733 }
734
735 static ssize_t vlan_protocol_store(struct device *d,
736 struct device_attribute *attr,
737 const char *buf, size_t len)
738 {
739 return store_bridge_parm(d, buf, len, br_vlan_set_proto);
740 }
741 static DEVICE_ATTR_RW(vlan_protocol);
742
743 static ssize_t default_pvid_show(struct device *d,
744 struct device_attribute *attr,
745 char *buf)
746 {
747 struct net_bridge *br = to_bridge(d);
748 return sprintf(buf, "%d\n", br->default_pvid);
749 }
750
751 static ssize_t default_pvid_store(struct device *d,
752 struct device_attribute *attr,
753 const char *buf, size_t len)
754 {
755 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
756 }
757 static DEVICE_ATTR_RW(default_pvid);
758
759 static ssize_t vlan_stats_enabled_show(struct device *d,
760 struct device_attribute *attr,
761 char *buf)
762 {
763 struct net_bridge *br = to_bridge(d);
764 return sprintf(buf, "%u\n", br->vlan_stats_enabled);
765 }
766
767 static ssize_t vlan_stats_enabled_store(struct device *d,
768 struct device_attribute *attr,
769 const char *buf, size_t len)
770 {
771 return store_bridge_parm(d, buf, len, br_vlan_set_stats);
772 }
773 static DEVICE_ATTR_RW(vlan_stats_enabled);
774 #endif
775
776 static struct attribute *bridge_attrs[] = {
777 &dev_attr_forward_delay.attr,
778 &dev_attr_hello_time.attr,
779 &dev_attr_max_age.attr,
780 &dev_attr_ageing_time.attr,
781 &dev_attr_stp_state.attr,
782 &dev_attr_group_fwd_mask.attr,
783 &dev_attr_priority.attr,
784 &dev_attr_bridge_id.attr,
785 &dev_attr_root_id.attr,
786 &dev_attr_root_path_cost.attr,
787 &dev_attr_root_port.attr,
788 &dev_attr_topology_change.attr,
789 &dev_attr_topology_change_detected.attr,
790 &dev_attr_hello_timer.attr,
791 &dev_attr_tcn_timer.attr,
792 &dev_attr_topology_change_timer.attr,
793 &dev_attr_gc_timer.attr,
794 &dev_attr_group_addr.attr,
795 &dev_attr_flush.attr,
796 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
797 &dev_attr_multicast_router.attr,
798 &dev_attr_multicast_snooping.attr,
799 &dev_attr_multicast_querier.attr,
800 &dev_attr_multicast_query_use_ifaddr.attr,
801 &dev_attr_hash_elasticity.attr,
802 &dev_attr_hash_max.attr,
803 &dev_attr_multicast_last_member_count.attr,
804 &dev_attr_multicast_startup_query_count.attr,
805 &dev_attr_multicast_last_member_interval.attr,
806 &dev_attr_multicast_membership_interval.attr,
807 &dev_attr_multicast_querier_interval.attr,
808 &dev_attr_multicast_query_interval.attr,
809 &dev_attr_multicast_query_response_interval.attr,
810 &dev_attr_multicast_startup_query_interval.attr,
811 &dev_attr_multicast_stats_enabled.attr,
812 #endif
813 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
814 &dev_attr_nf_call_iptables.attr,
815 &dev_attr_nf_call_ip6tables.attr,
816 &dev_attr_nf_call_arptables.attr,
817 #endif
818 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
819 &dev_attr_vlan_filtering.attr,
820 &dev_attr_vlan_protocol.attr,
821 &dev_attr_default_pvid.attr,
822 &dev_attr_vlan_stats_enabled.attr,
823 #endif
824 NULL
825 };
826
827 static struct attribute_group bridge_group = {
828 .name = SYSFS_BRIDGE_ATTR,
829 .attrs = bridge_attrs,
830 };
831
832 /*
833 * Export the forwarding information table as a binary file
834 * The records are struct __fdb_entry.
835 *
836 * Returns the number of bytes read.
837 */
838 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
839 struct bin_attribute *bin_attr,
840 char *buf, loff_t off, size_t count)
841 {
842 struct device *dev = kobj_to_dev(kobj);
843 struct net_bridge *br = to_bridge(dev);
844 int n;
845
846 /* must read whole records */
847 if (off % sizeof(struct __fdb_entry) != 0)
848 return -EINVAL;
849
850 n = br_fdb_fillbuf(br, buf,
851 count / sizeof(struct __fdb_entry),
852 off / sizeof(struct __fdb_entry));
853
854 if (n > 0)
855 n *= sizeof(struct __fdb_entry);
856
857 return n;
858 }
859
860 static struct bin_attribute bridge_forward = {
861 .attr = { .name = SYSFS_BRIDGE_FDB,
862 .mode = S_IRUGO, },
863 .read = brforward_read,
864 };
865
866 /*
867 * Add entries in sysfs onto the existing network class device
868 * for the bridge.
869 * Adds a attribute group "bridge" containing tuning parameters.
870 * Binary attribute containing the forward table
871 * Sub directory to hold links to interfaces.
872 *
873 * Note: the ifobj exists only to be a subdirectory
874 * to hold links. The ifobj exists in same data structure
875 * as it's parent the bridge so reference counting works.
876 */
877 int br_sysfs_addbr(struct net_device *dev)
878 {
879 struct kobject *brobj = &dev->dev.kobj;
880 struct net_bridge *br = netdev_priv(dev);
881 int err;
882
883 err = sysfs_create_group(brobj, &bridge_group);
884 if (err) {
885 pr_info("%s: can't create group %s/%s\n",
886 __func__, dev->name, bridge_group.name);
887 goto out1;
888 }
889
890 err = sysfs_create_bin_file(brobj, &bridge_forward);
891 if (err) {
892 pr_info("%s: can't create attribute file %s/%s\n",
893 __func__, dev->name, bridge_forward.attr.name);
894 goto out2;
895 }
896
897 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
898 if (!br->ifobj) {
899 pr_info("%s: can't add kobject (directory) %s/%s\n",
900 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
901 goto out3;
902 }
903 return 0;
904 out3:
905 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
906 out2:
907 sysfs_remove_group(&dev->dev.kobj, &bridge_group);
908 out1:
909 return err;
910
911 }
912
913 void br_sysfs_delbr(struct net_device *dev)
914 {
915 struct kobject *kobj = &dev->dev.kobj;
916 struct net_bridge *br = netdev_priv(dev);
917
918 kobject_put(br->ifobj);
919 sysfs_remove_bin_file(kobj, &bridge_forward);
920 sysfs_remove_group(kobj, &bridge_group);
921 }