Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / net / bridge / br_sysfs_br.c
blob5c1e5559ebba23c9cd5a1f6e1c0d63280821284a
1 /*
2 * Sysfs attributes of bridge ports
3 * Linux ethernet bridge
5 * Authors:
6 * Stephen Hemminger <shemminger@osdl.org>
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.
14 #include <linux/capability.h>
15 #include <linux/kernel.h>
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <linux/rtnetlink.h>
19 #include <linux/spinlock.h>
20 #include <linux/times.h>
22 #include "br_private.h"
24 #define to_dev(obj) container_of(obj, struct device, kobj)
25 #define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
28 * Common code for storing bridge parameters.
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))
34 struct net_bridge *br = to_bridge(d);
35 char *endp;
36 unsigned long val;
37 int err;
39 if (!capable(CAP_NET_ADMIN))
40 return -EPERM;
42 val = simple_strtoul(buf, &endp, 0);
43 if (endp == buf)
44 return -EINVAL;
46 spin_lock_bh(&br->lock);
47 err = (*set)(br, val);
48 spin_unlock_bh(&br->lock);
49 return err ? err : len;
53 static ssize_t show_forward_delay(struct device *d,
54 struct device_attribute *attr, char *buf)
56 struct net_bridge *br = to_bridge(d);
57 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
60 static int set_forward_delay(struct net_bridge *br, unsigned long val)
62 unsigned long delay = clock_t_to_jiffies(val);
63 br->forward_delay = delay;
64 if (br_is_root_bridge(br))
65 br->bridge_forward_delay = delay;
66 return 0;
69 static ssize_t store_forward_delay(struct device *d,
70 struct device_attribute *attr,
71 const char *buf, size_t len)
73 return store_bridge_parm(d, buf, len, set_forward_delay);
75 static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
76 show_forward_delay, store_forward_delay);
78 static ssize_t show_hello_time(struct device *d, struct device_attribute *attr,
79 char *buf)
81 return sprintf(buf, "%lu\n",
82 jiffies_to_clock_t(to_bridge(d)->hello_time));
85 static int set_hello_time(struct net_bridge *br, unsigned long val)
87 unsigned long t = clock_t_to_jiffies(val);
89 if (t < HZ)
90 return -EINVAL;
92 br->hello_time = t;
93 if (br_is_root_bridge(br))
94 br->bridge_hello_time = t;
95 return 0;
98 static ssize_t store_hello_time(struct device *d,
99 struct device_attribute *attr, const char *buf,
100 size_t len)
102 return store_bridge_parm(d, buf, len, set_hello_time);
104 static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
105 store_hello_time);
107 static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
108 char *buf)
110 return sprintf(buf, "%lu\n",
111 jiffies_to_clock_t(to_bridge(d)->max_age));
114 static int set_max_age(struct net_bridge *br, unsigned long val)
116 unsigned long t = clock_t_to_jiffies(val);
117 br->max_age = t;
118 if (br_is_root_bridge(br))
119 br->bridge_max_age = t;
120 return 0;
123 static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
124 const char *buf, size_t len)
126 return store_bridge_parm(d, buf, len, set_max_age);
128 static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
130 static ssize_t show_ageing_time(struct device *d,
131 struct device_attribute *attr, char *buf)
133 struct net_bridge *br = to_bridge(d);
134 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
137 static int set_ageing_time(struct net_bridge *br, unsigned long val)
139 br->ageing_time = clock_t_to_jiffies(val);
140 return 0;
143 static ssize_t store_ageing_time(struct device *d,
144 struct device_attribute *attr,
145 const char *buf, size_t len)
147 return store_bridge_parm(d, buf, len, set_ageing_time);
149 static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
150 store_ageing_time);
152 static ssize_t show_stp_state(struct device *d,
153 struct device_attribute *attr, char *buf)
155 struct net_bridge *br = to_bridge(d);
156 return sprintf(buf, "%d\n", br->stp_enabled);
160 static ssize_t store_stp_state(struct device *d,
161 struct device_attribute *attr, const char *buf,
162 size_t len)
164 struct net_bridge *br = to_bridge(d);
165 char *endp;
166 unsigned long val;
168 if (!capable(CAP_NET_ADMIN))
169 return -EPERM;
171 val = simple_strtoul(buf, &endp, 0);
172 if (endp == buf)
173 return -EINVAL;
175 if (!rtnl_trylock())
176 return restart_syscall();
177 br_stp_set_enabled(br, val);
178 rtnl_unlock();
180 return len;
182 static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
183 store_stp_state);
185 static ssize_t show_priority(struct device *d, struct device_attribute *attr,
186 char *buf)
188 struct net_bridge *br = to_bridge(d);
189 return sprintf(buf, "%d\n",
190 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
193 static int set_priority(struct net_bridge *br, unsigned long val)
195 br_stp_set_bridge_priority(br, (u16) val);
196 return 0;
199 static ssize_t store_priority(struct device *d, struct device_attribute *attr,
200 const char *buf, size_t len)
202 return store_bridge_parm(d, buf, len, set_priority);
204 static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
206 static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
207 char *buf)
209 return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
211 static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
213 static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
214 char *buf)
216 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
218 static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
220 static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
221 char *buf)
223 return sprintf(buf, "%d\n", to_bridge(d)->root_port);
225 static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
227 static ssize_t show_root_path_cost(struct device *d,
228 struct device_attribute *attr, char *buf)
230 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
232 static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
234 static ssize_t show_topology_change(struct device *d,
235 struct device_attribute *attr, char *buf)
237 return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
239 static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
241 static ssize_t show_topology_change_detected(struct device *d,
242 struct device_attribute *attr,
243 char *buf)
245 struct net_bridge *br = to_bridge(d);
246 return sprintf(buf, "%d\n", br->topology_change_detected);
248 static DEVICE_ATTR(topology_change_detected, S_IRUGO,
249 show_topology_change_detected, NULL);
251 static ssize_t show_hello_timer(struct device *d,
252 struct device_attribute *attr, char *buf)
254 struct net_bridge *br = to_bridge(d);
255 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
257 static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
259 static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
260 char *buf)
262 struct net_bridge *br = to_bridge(d);
263 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
265 static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
267 static ssize_t show_topology_change_timer(struct device *d,
268 struct device_attribute *attr,
269 char *buf)
271 struct net_bridge *br = to_bridge(d);
272 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
274 static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
275 NULL);
277 static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
278 char *buf)
280 struct net_bridge *br = to_bridge(d);
281 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
283 static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
285 static ssize_t show_group_addr(struct device *d,
286 struct device_attribute *attr, char *buf)
288 struct net_bridge *br = to_bridge(d);
289 return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
290 br->group_addr[0], br->group_addr[1],
291 br->group_addr[2], br->group_addr[3],
292 br->group_addr[4], br->group_addr[5]);
295 static ssize_t store_group_addr(struct device *d,
296 struct device_attribute *attr,
297 const char *buf, size_t len)
299 struct net_bridge *br = to_bridge(d);
300 unsigned new_addr[6];
301 int i;
303 if (!capable(CAP_NET_ADMIN))
304 return -EPERM;
306 if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
307 &new_addr[0], &new_addr[1], &new_addr[2],
308 &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
309 return -EINVAL;
311 /* Must be 01:80:c2:00:00:0X */
312 for (i = 0; i < 5; i++)
313 if (new_addr[i] != br_group_address[i])
314 return -EINVAL;
316 if (new_addr[5] & ~0xf)
317 return -EINVAL;
319 if (new_addr[5] == 1 || /* 802.3x Pause address */
320 new_addr[5] == 2 || /* 802.3ad Slow protocols */
321 new_addr[5] == 3) /* 802.1X PAE address */
322 return -EINVAL;
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 return len;
331 static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
332 show_group_addr, store_group_addr);
334 static ssize_t store_flush(struct device *d,
335 struct device_attribute *attr,
336 const char *buf, size_t len)
338 struct net_bridge *br = to_bridge(d);
340 if (!capable(CAP_NET_ADMIN))
341 return -EPERM;
343 br_fdb_flush(br);
344 return len;
346 static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
348 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
349 static ssize_t show_multicast_router(struct device *d,
350 struct device_attribute *attr, char *buf)
352 struct net_bridge *br = to_bridge(d);
353 return sprintf(buf, "%d\n", br->multicast_router);
356 static ssize_t store_multicast_router(struct device *d,
357 struct device_attribute *attr,
358 const char *buf, size_t len)
360 return store_bridge_parm(d, buf, len, br_multicast_set_router);
362 static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
363 store_multicast_router);
365 static ssize_t show_multicast_snooping(struct device *d,
366 struct device_attribute *attr,
367 char *buf)
369 struct net_bridge *br = to_bridge(d);
370 return sprintf(buf, "%d\n", !br->multicast_disabled);
373 static ssize_t store_multicast_snooping(struct device *d,
374 struct device_attribute *attr,
375 const char *buf, size_t len)
377 return store_bridge_parm(d, buf, len, br_multicast_toggle);
379 static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
380 show_multicast_snooping, store_multicast_snooping);
382 static ssize_t show_hash_elasticity(struct device *d,
383 struct device_attribute *attr, char *buf)
385 struct net_bridge *br = to_bridge(d);
386 return sprintf(buf, "%u\n", br->hash_elasticity);
389 static int set_elasticity(struct net_bridge *br, unsigned long val)
391 br->hash_elasticity = val;
392 return 0;
395 static ssize_t store_hash_elasticity(struct device *d,
396 struct device_attribute *attr,
397 const char *buf, size_t len)
399 return store_bridge_parm(d, buf, len, set_elasticity);
401 static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
402 store_hash_elasticity);
404 static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
405 char *buf)
407 struct net_bridge *br = to_bridge(d);
408 return sprintf(buf, "%u\n", br->hash_max);
411 static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
412 const char *buf, size_t len)
414 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
416 static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
417 store_hash_max);
419 static ssize_t show_multicast_last_member_count(struct device *d,
420 struct device_attribute *attr,
421 char *buf)
423 struct net_bridge *br = to_bridge(d);
424 return sprintf(buf, "%u\n", br->multicast_last_member_count);
427 static int set_last_member_count(struct net_bridge *br, unsigned long val)
429 br->multicast_last_member_count = val;
430 return 0;
433 static ssize_t store_multicast_last_member_count(struct device *d,
434 struct device_attribute *attr,
435 const char *buf, size_t len)
437 return store_bridge_parm(d, buf, len, set_last_member_count);
439 static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR,
440 show_multicast_last_member_count,
441 store_multicast_last_member_count);
443 static ssize_t show_multicast_startup_query_count(
444 struct device *d, struct device_attribute *attr, char *buf)
446 struct net_bridge *br = to_bridge(d);
447 return sprintf(buf, "%u\n", br->multicast_startup_query_count);
450 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
452 br->multicast_startup_query_count = val;
453 return 0;
456 static ssize_t store_multicast_startup_query_count(
457 struct device *d, struct device_attribute *attr, const char *buf,
458 size_t len)
460 return store_bridge_parm(d, buf, len, set_startup_query_count);
462 static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR,
463 show_multicast_startup_query_count,
464 store_multicast_startup_query_count);
466 static ssize_t show_multicast_last_member_interval(
467 struct device *d, struct device_attribute *attr, char *buf)
469 struct net_bridge *br = to_bridge(d);
470 return sprintf(buf, "%lu\n",
471 jiffies_to_clock_t(br->multicast_last_member_interval));
474 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
476 br->multicast_last_member_interval = clock_t_to_jiffies(val);
477 return 0;
480 static ssize_t store_multicast_last_member_interval(
481 struct device *d, struct device_attribute *attr, const char *buf,
482 size_t len)
484 return store_bridge_parm(d, buf, len, set_last_member_interval);
486 static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR,
487 show_multicast_last_member_interval,
488 store_multicast_last_member_interval);
490 static ssize_t show_multicast_membership_interval(
491 struct device *d, struct device_attribute *attr, char *buf)
493 struct net_bridge *br = to_bridge(d);
494 return sprintf(buf, "%lu\n",
495 jiffies_to_clock_t(br->multicast_membership_interval));
498 static int set_membership_interval(struct net_bridge *br, unsigned long val)
500 br->multicast_membership_interval = clock_t_to_jiffies(val);
501 return 0;
504 static ssize_t store_multicast_membership_interval(
505 struct device *d, struct device_attribute *attr, const char *buf,
506 size_t len)
508 return store_bridge_parm(d, buf, len, set_membership_interval);
510 static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR,
511 show_multicast_membership_interval,
512 store_multicast_membership_interval);
514 static ssize_t show_multicast_querier_interval(struct device *d,
515 struct device_attribute *attr,
516 char *buf)
518 struct net_bridge *br = to_bridge(d);
519 return sprintf(buf, "%lu\n",
520 jiffies_to_clock_t(br->multicast_querier_interval));
523 static int set_querier_interval(struct net_bridge *br, unsigned long val)
525 br->multicast_querier_interval = clock_t_to_jiffies(val);
526 return 0;
529 static ssize_t store_multicast_querier_interval(struct device *d,
530 struct device_attribute *attr,
531 const char *buf, size_t len)
533 return store_bridge_parm(d, buf, len, set_querier_interval);
535 static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR,
536 show_multicast_querier_interval,
537 store_multicast_querier_interval);
539 static ssize_t show_multicast_query_interval(struct device *d,
540 struct device_attribute *attr,
541 char *buf)
543 struct net_bridge *br = to_bridge(d);
544 return sprintf(buf, "%lu\n",
545 jiffies_to_clock_t(br->multicast_query_interval));
548 static int set_query_interval(struct net_bridge *br, unsigned long val)
550 br->multicast_query_interval = clock_t_to_jiffies(val);
551 return 0;
554 static ssize_t store_multicast_query_interval(struct device *d,
555 struct device_attribute *attr,
556 const char *buf, size_t len)
558 return store_bridge_parm(d, buf, len, set_query_interval);
560 static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR,
561 show_multicast_query_interval,
562 store_multicast_query_interval);
564 static ssize_t show_multicast_query_response_interval(
565 struct device *d, struct device_attribute *attr, char *buf)
567 struct net_bridge *br = to_bridge(d);
568 return sprintf(
569 buf, "%lu\n",
570 jiffies_to_clock_t(br->multicast_query_response_interval));
573 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
575 br->multicast_query_response_interval = clock_t_to_jiffies(val);
576 return 0;
579 static ssize_t store_multicast_query_response_interval(
580 struct device *d, struct device_attribute *attr, const char *buf,
581 size_t len)
583 return store_bridge_parm(d, buf, len, set_query_response_interval);
585 static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR,
586 show_multicast_query_response_interval,
587 store_multicast_query_response_interval);
589 static ssize_t show_multicast_startup_query_interval(
590 struct device *d, struct device_attribute *attr, char *buf)
592 struct net_bridge *br = to_bridge(d);
593 return sprintf(
594 buf, "%lu\n",
595 jiffies_to_clock_t(br->multicast_startup_query_interval));
598 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
600 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
601 return 0;
604 static ssize_t store_multicast_startup_query_interval(
605 struct device *d, struct device_attribute *attr, const char *buf,
606 size_t len)
608 return store_bridge_parm(d, buf, len, set_startup_query_interval);
610 static DEVICE_ATTR(multicast_startup_query_interval, S_IRUGO | S_IWUSR,
611 show_multicast_startup_query_interval,
612 store_multicast_startup_query_interval);
613 #endif
614 #ifdef CONFIG_BRIDGE_NETFILTER
615 static ssize_t show_nf_call_iptables(
616 struct device *d, struct device_attribute *attr, char *buf)
618 struct net_bridge *br = to_bridge(d);
619 return sprintf(buf, "%u\n", br->nf_call_iptables);
622 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
624 br->nf_call_iptables = val ? true : false;
625 return 0;
628 static ssize_t store_nf_call_iptables(
629 struct device *d, struct device_attribute *attr, const char *buf,
630 size_t len)
632 return store_bridge_parm(d, buf, len, set_nf_call_iptables);
634 static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR,
635 show_nf_call_iptables, store_nf_call_iptables);
637 static ssize_t show_nf_call_ip6tables(
638 struct device *d, struct device_attribute *attr, char *buf)
640 struct net_bridge *br = to_bridge(d);
641 return sprintf(buf, "%u\n", br->nf_call_ip6tables);
644 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
646 br->nf_call_ip6tables = val ? true : false;
647 return 0;
650 static ssize_t store_nf_call_ip6tables(
651 struct device *d, struct device_attribute *attr, const char *buf,
652 size_t len)
654 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
656 static DEVICE_ATTR(nf_call_ip6tables, S_IRUGO | S_IWUSR,
657 show_nf_call_ip6tables, store_nf_call_ip6tables);
659 static ssize_t show_nf_call_arptables(
660 struct device *d, struct device_attribute *attr, char *buf)
662 struct net_bridge *br = to_bridge(d);
663 return sprintf(buf, "%u\n", br->nf_call_arptables);
666 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
668 br->nf_call_arptables = val ? true : false;
669 return 0;
672 static ssize_t store_nf_call_arptables(
673 struct device *d, struct device_attribute *attr, const char *buf,
674 size_t len)
676 return store_bridge_parm(d, buf, len, set_nf_call_arptables);
678 static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR,
679 show_nf_call_arptables, store_nf_call_arptables);
680 #endif
682 static struct attribute *bridge_attrs[] = {
683 &dev_attr_forward_delay.attr,
684 &dev_attr_hello_time.attr,
685 &dev_attr_max_age.attr,
686 &dev_attr_ageing_time.attr,
687 &dev_attr_stp_state.attr,
688 &dev_attr_priority.attr,
689 &dev_attr_bridge_id.attr,
690 &dev_attr_root_id.attr,
691 &dev_attr_root_path_cost.attr,
692 &dev_attr_root_port.attr,
693 &dev_attr_topology_change.attr,
694 &dev_attr_topology_change_detected.attr,
695 &dev_attr_hello_timer.attr,
696 &dev_attr_tcn_timer.attr,
697 &dev_attr_topology_change_timer.attr,
698 &dev_attr_gc_timer.attr,
699 &dev_attr_group_addr.attr,
700 &dev_attr_flush.attr,
701 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
702 &dev_attr_multicast_router.attr,
703 &dev_attr_multicast_snooping.attr,
704 &dev_attr_hash_elasticity.attr,
705 &dev_attr_hash_max.attr,
706 &dev_attr_multicast_last_member_count.attr,
707 &dev_attr_multicast_startup_query_count.attr,
708 &dev_attr_multicast_last_member_interval.attr,
709 &dev_attr_multicast_membership_interval.attr,
710 &dev_attr_multicast_querier_interval.attr,
711 &dev_attr_multicast_query_interval.attr,
712 &dev_attr_multicast_query_response_interval.attr,
713 &dev_attr_multicast_startup_query_interval.attr,
714 #endif
715 #ifdef CONFIG_BRIDGE_NETFILTER
716 &dev_attr_nf_call_iptables.attr,
717 &dev_attr_nf_call_ip6tables.attr,
718 &dev_attr_nf_call_arptables.attr,
719 #endif
720 NULL
723 static struct attribute_group bridge_group = {
724 .name = SYSFS_BRIDGE_ATTR,
725 .attrs = bridge_attrs,
729 * Export the forwarding information table as a binary file
730 * The records are struct __fdb_entry.
732 * Returns the number of bytes read.
734 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
735 struct bin_attribute *bin_attr,
736 char *buf, loff_t off, size_t count)
738 struct device *dev = to_dev(kobj);
739 struct net_bridge *br = to_bridge(dev);
740 int n;
742 /* must read whole records */
743 if (off % sizeof(struct __fdb_entry) != 0)
744 return -EINVAL;
746 n = br_fdb_fillbuf(br, buf,
747 count / sizeof(struct __fdb_entry),
748 off / sizeof(struct __fdb_entry));
750 if (n > 0)
751 n *= sizeof(struct __fdb_entry);
753 return n;
756 static struct bin_attribute bridge_forward = {
757 .attr = { .name = SYSFS_BRIDGE_FDB,
758 .mode = S_IRUGO, },
759 .read = brforward_read,
763 * Add entries in sysfs onto the existing network class device
764 * for the bridge.
765 * Adds a attribute group "bridge" containing tuning parameters.
766 * Binary attribute containing the forward table
767 * Sub directory to hold links to interfaces.
769 * Note: the ifobj exists only to be a subdirectory
770 * to hold links. The ifobj exists in same data structure
771 * as it's parent the bridge so reference counting works.
773 int br_sysfs_addbr(struct net_device *dev)
775 struct kobject *brobj = &dev->dev.kobj;
776 struct net_bridge *br = netdev_priv(dev);
777 int err;
779 err = sysfs_create_group(brobj, &bridge_group);
780 if (err) {
781 pr_info("%s: can't create group %s/%s\n",
782 __func__, dev->name, bridge_group.name);
783 goto out1;
786 err = sysfs_create_bin_file(brobj, &bridge_forward);
787 if (err) {
788 pr_info("%s: can't create attribute file %s/%s\n",
789 __func__, dev->name, bridge_forward.attr.name);
790 goto out2;
793 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
794 if (!br->ifobj) {
795 pr_info("%s: can't add kobject (directory) %s/%s\n",
796 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
797 goto out3;
799 return 0;
800 out3:
801 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
802 out2:
803 sysfs_remove_group(&dev->dev.kobj, &bridge_group);
804 out1:
805 return err;
809 void br_sysfs_delbr(struct net_device *dev)
811 struct kobject *kobj = &dev->dev.kobj;
812 struct net_bridge *br = netdev_priv(dev);
814 kobject_put(br->ifobj);
815 sysfs_remove_bin_file(kobj, &bridge_forward);
816 sysfs_remove_group(kobj, &bridge_group);