Root/net/bridge/br_sysfs_br.c

1/*
2 * Sysfs attributes of bridge ports
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/if_bridge.h>
18#include <linux/rtnetlink.h>
19#include <linux/spinlock.h>
20#include <linux/times.h>
21
22#include "br_private.h"
23
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)))
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 (!capable(CAP_NET_ADMIN))
40        return -EPERM;
41
42    val = simple_strtoul(buf, &endp, 0);
43    if (endp == buf)
44        return -EINVAL;
45
46    spin_lock_bh(&br->lock);
47    err = (*set)(br, val);
48    spin_unlock_bh(&br->lock);
49    return err ? err : len;
50}
51
52
53static ssize_t show_forward_delay(struct device *d,
54                  struct device_attribute *attr, char *buf)
55{
56    struct net_bridge *br = to_bridge(d);
57    return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
58}
59
60static int set_forward_delay(struct net_bridge *br, unsigned long val)
61{
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;
67}
68
69static ssize_t store_forward_delay(struct device *d,
70                   struct device_attribute *attr,
71                   const char *buf, size_t len)
72{
73    return store_bridge_parm(d, buf, len, set_forward_delay);
74}
75static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
76           show_forward_delay, store_forward_delay);
77
78static ssize_t show_hello_time(struct device *d, struct device_attribute *attr,
79                   char *buf)
80{
81    return sprintf(buf, "%lu\n",
82               jiffies_to_clock_t(to_bridge(d)->hello_time));
83}
84
85static int set_hello_time(struct net_bridge *br, unsigned long val)
86{
87    unsigned long t = clock_t_to_jiffies(val);
88
89    if (t < HZ)
90        return -EINVAL;
91
92    br->hello_time = t;
93    if (br_is_root_bridge(br))
94        br->bridge_hello_time = t;
95    return 0;
96}
97
98static ssize_t store_hello_time(struct device *d,
99                struct device_attribute *attr, const char *buf,
100                size_t len)
101{
102    return store_bridge_parm(d, buf, len, set_hello_time);
103}
104static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
105           store_hello_time);
106
107static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
108                char *buf)
109{
110    return sprintf(buf, "%lu\n",
111               jiffies_to_clock_t(to_bridge(d)->max_age));
112}
113
114static int set_max_age(struct net_bridge *br, unsigned long val)
115{
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;
121}
122
123static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
124                 const char *buf, size_t len)
125{
126    return store_bridge_parm(d, buf, len, set_max_age);
127}
128static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
129
130static ssize_t show_ageing_time(struct device *d,
131                struct device_attribute *attr, char *buf)
132{
133    struct net_bridge *br = to_bridge(d);
134    return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
135}
136
137static int set_ageing_time(struct net_bridge *br, unsigned long val)
138{
139    br->ageing_time = clock_t_to_jiffies(val);
140    return 0;
141}
142
143static ssize_t store_ageing_time(struct device *d,
144                 struct device_attribute *attr,
145                 const char *buf, size_t len)
146{
147    return store_bridge_parm(d, buf, len, set_ageing_time);
148}
149static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
150           store_ageing_time);
151
152static ssize_t show_stp_state(struct device *d,
153                  struct device_attribute *attr, char *buf)
154{
155    struct net_bridge *br = to_bridge(d);
156    return sprintf(buf, "%d\n", br->stp_enabled);
157}
158
159
160static ssize_t store_stp_state(struct device *d,
161                   struct device_attribute *attr, const char *buf,
162                   size_t len)
163{
164    struct net_bridge *br = to_bridge(d);
165    char *endp;
166    unsigned long val;
167
168    if (!capable(CAP_NET_ADMIN))
169        return -EPERM;
170
171    val = simple_strtoul(buf, &endp, 0);
172    if (endp == buf)
173        return -EINVAL;
174
175    if (!rtnl_trylock())
176        return restart_syscall();
177    br_stp_set_enabled(br, val);
178    rtnl_unlock();
179
180    return len;
181}
182static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
183           store_stp_state);
184
185static ssize_t show_priority(struct device *d, struct device_attribute *attr,
186                 char *buf)
187{
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]);
191}
192
193static int set_priority(struct net_bridge *br, unsigned long val)
194{
195    br_stp_set_bridge_priority(br, (u16) val);
196    return 0;
197}
198
199static ssize_t store_priority(struct device *d, struct device_attribute *attr,
200                   const char *buf, size_t len)
201{
202    return store_bridge_parm(d, buf, len, set_priority);
203}
204static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
205
206static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
207                char *buf)
208{
209    return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
210}
211static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
212
213static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
214                  char *buf)
215{
216    return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
217}
218static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
219
220static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
221                  char *buf)
222{
223    return sprintf(buf, "%d\n", to_bridge(d)->root_port);
224}
225static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
226
227static ssize_t show_root_path_cost(struct device *d,
228                   struct device_attribute *attr, char *buf)
229{
230    return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
231}
232static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
233
234static ssize_t show_topology_change(struct device *d,
235                    struct device_attribute *attr, char *buf)
236{
237    return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
238}
239static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
240
241static ssize_t show_topology_change_detected(struct device *d,
242                         struct device_attribute *attr,
243                         char *buf)
244{
245    struct net_bridge *br = to_bridge(d);
246    return sprintf(buf, "%d\n", br->topology_change_detected);
247}
248static DEVICE_ATTR(topology_change_detected, S_IRUGO,
249           show_topology_change_detected, NULL);
250
251static ssize_t show_hello_timer(struct device *d,
252                struct device_attribute *attr, char *buf)
253{
254    struct net_bridge *br = to_bridge(d);
255    return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
256}
257static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
258
259static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
260                  char *buf)
261{
262    struct net_bridge *br = to_bridge(d);
263    return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
264}
265static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
266
267static ssize_t show_topology_change_timer(struct device *d,
268                      struct device_attribute *attr,
269                      char *buf)
270{
271    struct net_bridge *br = to_bridge(d);
272    return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
273}
274static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
275           NULL);
276
277static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
278                 char *buf)
279{
280    struct net_bridge *br = to_bridge(d);
281    return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
282}
283static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
284
285static ssize_t show_group_addr(struct device *d,
286                   struct device_attribute *attr, char *buf)
287{
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]);
293}
294
295static ssize_t store_group_addr(struct device *d,
296                struct device_attribute *attr,
297                const char *buf, size_t len)
298{
299    struct net_bridge *br = to_bridge(d);
300    unsigned new_addr[6];
301    int i;
302
303    if (!capable(CAP_NET_ADMIN))
304        return -EPERM;
305
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;
310
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;
315
316    if (new_addr[5] & ~0xf)
317        return -EINVAL;
318
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;
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    return len;
329}
330
331static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
332           show_group_addr, store_group_addr);
333
334static ssize_t store_flush(struct device *d,
335               struct device_attribute *attr,
336               const char *buf, size_t len)
337{
338    struct net_bridge *br = to_bridge(d);
339
340    if (!capable(CAP_NET_ADMIN))
341        return -EPERM;
342
343    br_fdb_flush(br);
344    return len;
345}
346static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
347
348#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
349static ssize_t show_multicast_router(struct device *d,
350                     struct device_attribute *attr, char *buf)
351{
352    struct net_bridge *br = to_bridge(d);
353    return sprintf(buf, "%d\n", br->multicast_router);
354}
355
356static ssize_t store_multicast_router(struct device *d,
357                      struct device_attribute *attr,
358                      const char *buf, size_t len)
359{
360    return store_bridge_parm(d, buf, len, br_multicast_set_router);
361}
362static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
363           store_multicast_router);
364
365static ssize_t show_multicast_snooping(struct device *d,
366                       struct device_attribute *attr,
367                       char *buf)
368{
369    struct net_bridge *br = to_bridge(d);
370    return sprintf(buf, "%d\n", !br->multicast_disabled);
371}
372
373static ssize_t store_multicast_snooping(struct device *d,
374                    struct device_attribute *attr,
375                    const char *buf, size_t len)
376{
377    return store_bridge_parm(d, buf, len, br_multicast_toggle);
378}
379static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
380           show_multicast_snooping, store_multicast_snooping);
381
382static ssize_t show_hash_elasticity(struct device *d,
383                    struct device_attribute *attr, char *buf)
384{
385    struct net_bridge *br = to_bridge(d);
386    return sprintf(buf, "%u\n", br->hash_elasticity);
387}
388
389static int set_elasticity(struct net_bridge *br, unsigned long val)
390{
391    br->hash_elasticity = val;
392    return 0;
393}
394
395static ssize_t store_hash_elasticity(struct device *d,
396                     struct device_attribute *attr,
397                     const char *buf, size_t len)
398{
399    return store_bridge_parm(d, buf, len, set_elasticity);
400}
401static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
402           store_hash_elasticity);
403
404static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
405                 char *buf)
406{
407    struct net_bridge *br = to_bridge(d);
408    return sprintf(buf, "%u\n", br->hash_max);
409}
410
411static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
412                  const char *buf, size_t len)
413{
414    return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
415}
416static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
417           store_hash_max);
418
419static ssize_t show_multicast_last_member_count(struct device *d,
420                        struct device_attribute *attr,
421                        char *buf)
422{
423    struct net_bridge *br = to_bridge(d);
424    return sprintf(buf, "%u\n", br->multicast_last_member_count);
425}
426
427static int set_last_member_count(struct net_bridge *br, unsigned long val)
428{
429    br->multicast_last_member_count = val;
430    return 0;
431}
432
433static ssize_t store_multicast_last_member_count(struct device *d,
434                         struct device_attribute *attr,
435                         const char *buf, size_t len)
436{
437    return store_bridge_parm(d, buf, len, set_last_member_count);
438}
439static DEVICE_ATTR(multicast_last_member_count, S_IRUGO | S_IWUSR,
440           show_multicast_last_member_count,
441           store_multicast_last_member_count);
442
443static ssize_t show_multicast_startup_query_count(
444    struct device *d, struct device_attribute *attr, char *buf)
445{
446    struct net_bridge *br = to_bridge(d);
447    return sprintf(buf, "%u\n", br->multicast_startup_query_count);
448}
449
450static int set_startup_query_count(struct net_bridge *br, unsigned long val)
451{
452    br->multicast_startup_query_count = val;
453    return 0;
454}
455
456static ssize_t store_multicast_startup_query_count(
457    struct device *d, struct device_attribute *attr, const char *buf,
458    size_t len)
459{
460    return store_bridge_parm(d, buf, len, set_startup_query_count);
461}
462static DEVICE_ATTR(multicast_startup_query_count, S_IRUGO | S_IWUSR,
463           show_multicast_startup_query_count,
464           store_multicast_startup_query_count);
465
466static ssize_t show_multicast_last_member_interval(
467    struct device *d, struct device_attribute *attr, char *buf)
468{
469    struct net_bridge *br = to_bridge(d);
470    return sprintf(buf, "%lu\n",
471               jiffies_to_clock_t(br->multicast_last_member_interval));
472}
473
474static int set_last_member_interval(struct net_bridge *br, unsigned long val)
475{
476    br->multicast_last_member_interval = clock_t_to_jiffies(val);
477    return 0;
478}
479
480static ssize_t store_multicast_last_member_interval(
481    struct device *d, struct device_attribute *attr, const char *buf,
482    size_t len)
483{
484    return store_bridge_parm(d, buf, len, set_last_member_interval);
485}
486static DEVICE_ATTR(multicast_last_member_interval, S_IRUGO | S_IWUSR,
487           show_multicast_last_member_interval,
488           store_multicast_last_member_interval);
489
490static ssize_t show_multicast_membership_interval(
491    struct device *d, struct device_attribute *attr, char *buf)
492{
493    struct net_bridge *br = to_bridge(d);
494    return sprintf(buf, "%lu\n",
495               jiffies_to_clock_t(br->multicast_membership_interval));
496}
497
498static int set_membership_interval(struct net_bridge *br, unsigned long val)
499{
500    br->multicast_membership_interval = clock_t_to_jiffies(val);
501    return 0;
502}
503
504static ssize_t store_multicast_membership_interval(
505    struct device *d, struct device_attribute *attr, const char *buf,
506    size_t len)
507{
508    return store_bridge_parm(d, buf, len, set_membership_interval);
509}
510static DEVICE_ATTR(multicast_membership_interval, S_IRUGO | S_IWUSR,
511           show_multicast_membership_interval,
512           store_multicast_membership_interval);
513
514static ssize_t show_multicast_querier_interval(struct device *d,
515                           struct device_attribute *attr,
516                           char *buf)
517{
518    struct net_bridge *br = to_bridge(d);
519    return sprintf(buf, "%lu\n",
520               jiffies_to_clock_t(br->multicast_querier_interval));
521}
522
523static int set_querier_interval(struct net_bridge *br, unsigned long val)
524{
525    br->multicast_querier_interval = clock_t_to_jiffies(val);
526    return 0;
527}
528
529static ssize_t store_multicast_querier_interval(struct device *d,
530                        struct device_attribute *attr,
531                        const char *buf, size_t len)
532{
533    return store_bridge_parm(d, buf, len, set_querier_interval);
534}
535static DEVICE_ATTR(multicast_querier_interval, S_IRUGO | S_IWUSR,
536           show_multicast_querier_interval,
537           store_multicast_querier_interval);
538
539static ssize_t show_multicast_query_interval(struct device *d,
540                         struct device_attribute *attr,
541                         char *buf)
542{
543    struct net_bridge *br = to_bridge(d);
544    return sprintf(buf, "%lu\n",
545               jiffies_to_clock_t(br->multicast_query_interval));
546}
547
548static int set_query_interval(struct net_bridge *br, unsigned long val)
549{
550    br->multicast_query_interval = clock_t_to_jiffies(val);
551    return 0;
552}
553
554static ssize_t store_multicast_query_interval(struct device *d,
555                          struct device_attribute *attr,
556                          const char *buf, size_t len)
557{
558    return store_bridge_parm(d, buf, len, set_query_interval);
559}
560static DEVICE_ATTR(multicast_query_interval, S_IRUGO | S_IWUSR,
561           show_multicast_query_interval,
562           store_multicast_query_interval);
563
564static ssize_t show_multicast_query_response_interval(
565    struct device *d, struct device_attribute *attr, char *buf)
566{
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));
571}
572
573static int set_query_response_interval(struct net_bridge *br, unsigned long val)
574{
575    br->multicast_query_response_interval = clock_t_to_jiffies(val);
576    return 0;
577}
578
579static ssize_t store_multicast_query_response_interval(
580    struct device *d, struct device_attribute *attr, const char *buf,
581    size_t len)
582{
583    return store_bridge_parm(d, buf, len, set_query_response_interval);
584}
585static DEVICE_ATTR(multicast_query_response_interval, S_IRUGO | S_IWUSR,
586           show_multicast_query_response_interval,
587           store_multicast_query_response_interval);
588
589static ssize_t show_multicast_startup_query_interval(
590    struct device *d, struct device_attribute *attr, char *buf)
591{
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));
596}
597
598static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
599{
600    br->multicast_startup_query_interval = clock_t_to_jiffies(val);
601    return 0;
602}
603
604static ssize_t store_multicast_startup_query_interval(
605    struct device *d, struct device_attribute *attr, const char *buf,
606    size_t len)
607{
608    return store_bridge_parm(d, buf, len, set_startup_query_interval);
609}
610static 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
615static ssize_t show_nf_call_iptables(
616    struct device *d, struct device_attribute *attr, char *buf)
617{
618    struct net_bridge *br = to_bridge(d);
619    return sprintf(buf, "%u\n", br->nf_call_iptables);
620}
621
622static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
623{
624    br->nf_call_iptables = val ? true : false;
625    return 0;
626}
627
628static ssize_t store_nf_call_iptables(
629    struct device *d, struct device_attribute *attr, const char *buf,
630    size_t len)
631{
632    return store_bridge_parm(d, buf, len, set_nf_call_iptables);
633}
634static DEVICE_ATTR(nf_call_iptables, S_IRUGO | S_IWUSR,
635           show_nf_call_iptables, store_nf_call_iptables);
636
637static ssize_t show_nf_call_ip6tables(
638    struct device *d, struct device_attribute *attr, char *buf)
639{
640    struct net_bridge *br = to_bridge(d);
641    return sprintf(buf, "%u\n", br->nf_call_ip6tables);
642}
643
644static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
645{
646    br->nf_call_ip6tables = val ? true : false;
647    return 0;
648}
649
650static ssize_t store_nf_call_ip6tables(
651    struct device *d, struct device_attribute *attr, const char *buf,
652    size_t len)
653{
654    return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
655}
656static DEVICE_ATTR(nf_call_ip6tables, S_IRUGO | S_IWUSR,
657           show_nf_call_ip6tables, store_nf_call_ip6tables);
658
659static ssize_t show_nf_call_arptables(
660    struct device *d, struct device_attribute *attr, char *buf)
661{
662    struct net_bridge *br = to_bridge(d);
663    return sprintf(buf, "%u\n", br->nf_call_arptables);
664}
665
666static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
667{
668    br->nf_call_arptables = val ? true : false;
669    return 0;
670}
671
672static ssize_t store_nf_call_arptables(
673    struct device *d, struct device_attribute *attr, const char *buf,
674    size_t len)
675{
676    return store_bridge_parm(d, buf, len, set_nf_call_arptables);
677}
678static DEVICE_ATTR(nf_call_arptables, S_IRUGO | S_IWUSR,
679           show_nf_call_arptables, store_nf_call_arptables);
680#endif
681
682static 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
721};
722
723static struct attribute_group bridge_group = {
724    .name = SYSFS_BRIDGE_ATTR,
725    .attrs = bridge_attrs,
726};
727
728/*
729 * Export the forwarding information table as a binary file
730 * The records are struct __fdb_entry.
731 *
732 * Returns the number of bytes read.
733 */
734static 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)
737{
738    struct device *dev = to_dev(kobj);
739    struct net_bridge *br = to_bridge(dev);
740    int n;
741
742    /* must read whole records */
743    if (off % sizeof(struct __fdb_entry) != 0)
744        return -EINVAL;
745
746    n = br_fdb_fillbuf(br, buf,
747                count / sizeof(struct __fdb_entry),
748                off / sizeof(struct __fdb_entry));
749
750    if (n > 0)
751        n *= sizeof(struct __fdb_entry);
752
753    return n;
754}
755
756static struct bin_attribute bridge_forward = {
757    .attr = { .name = SYSFS_BRIDGE_FDB,
758          .mode = S_IRUGO, },
759    .read = brforward_read,
760};
761
762/*
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.
768 *
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.
772 */
773int br_sysfs_addbr(struct net_device *dev)
774{
775    struct kobject *brobj = &dev->dev.kobj;
776    struct net_bridge *br = netdev_priv(dev);
777    int err;
778
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;
784    }
785
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;
791    }
792
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;
798    }
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;
806
807}
808
809void br_sysfs_delbr(struct net_device *dev)
810{
811    struct kobject *kobj = &dev->dev.kobj;
812    struct net_bridge *br = netdev_priv(dev);
813
814    kobject_put(br->ifobj);
815    sysfs_remove_bin_file(kobj, &bridge_forward);
816    sysfs_remove_group(kobj, &bridge_group);
817}
818

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