2 * Sysfs attributes of bridge
3 * Linux ethernet bridge
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/etherdevice.h>
18 #include <linux/if_bridge.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/spinlock.h>
21 #include <linux/times.h>
22 #include <linux/sched/signal.h>
24 #include "br_private.h"
26 #define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
29 * Common code for storing bridge parameters.
31 static ssize_t store_bridge_parm(struct device *d,
32 const char *buf, size_t len,
33 int (*set)(struct net_bridge *, unsigned long))
35 struct net_bridge *br = to_bridge(d);
40 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
43 val = simple_strtoul(buf, &endp, 0);
48 return restart_syscall();
50 err = (*set)(br, val);
52 netdev_state_change(br->dev);
55 return err ? err : len;
59 static ssize_t forward_delay_show(struct device *d,
60 struct device_attribute *attr, char *buf)
62 struct net_bridge *br = to_bridge(d);
63 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
66 static ssize_t forward_delay_store(struct device *d,
67 struct device_attribute *attr,
68 const char *buf, size_t len)
70 return store_bridge_parm(d, buf, len, br_set_forward_delay);
72 static DEVICE_ATTR_RW(forward_delay);
74 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
77 return sprintf(buf, "%lu\n",
78 jiffies_to_clock_t(to_bridge(d)->hello_time));
81 static ssize_t hello_time_store(struct device *d,
82 struct device_attribute *attr, const char *buf,
85 return store_bridge_parm(d, buf, len, br_set_hello_time);
87 static DEVICE_ATTR_RW(hello_time);
89 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
92 return sprintf(buf, "%lu\n",
93 jiffies_to_clock_t(to_bridge(d)->max_age));
96 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
97 const char *buf, size_t len)
99 return store_bridge_parm(d, buf, len, br_set_max_age);
101 static DEVICE_ATTR_RW(max_age);
103 static ssize_t ageing_time_show(struct device *d,
104 struct device_attribute *attr, char *buf)
106 struct net_bridge *br = to_bridge(d);
107 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
110 static int set_ageing_time(struct net_bridge *br, unsigned long val)
112 return br_set_ageing_time(br, val);
115 static ssize_t ageing_time_store(struct device *d,
116 struct device_attribute *attr,
117 const char *buf, size_t len)
119 return store_bridge_parm(d, buf, len, set_ageing_time);
121 static DEVICE_ATTR_RW(ageing_time);
123 static ssize_t stp_state_show(struct device *d,
124 struct device_attribute *attr, char *buf)
126 struct net_bridge *br = to_bridge(d);
127 return sprintf(buf, "%d\n", br->stp_enabled);
131 static int set_stp_state(struct net_bridge *br, unsigned long val)
133 br_stp_set_enabled(br, val);
138 static ssize_t stp_state_store(struct device *d,
139 struct device_attribute *attr, const char *buf,
142 return store_bridge_parm(d, buf, len, set_stp_state);
144 static DEVICE_ATTR_RW(stp_state);
146 static ssize_t group_fwd_mask_show(struct device *d,
147 struct device_attribute *attr,
150 struct net_bridge *br = to_bridge(d);
151 return sprintf(buf, "%#x\n", br->group_fwd_mask);
154 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val)
156 if (val & BR_GROUPFWD_RESTRICTED)
159 br->group_fwd_mask = val;
164 static ssize_t group_fwd_mask_store(struct device *d,
165 struct device_attribute *attr,
169 return store_bridge_parm(d, buf, len, set_group_fwd_mask);
171 static DEVICE_ATTR_RW(group_fwd_mask);
173 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
176 struct net_bridge *br = to_bridge(d);
177 return sprintf(buf, "%d\n",
178 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
181 static int set_priority(struct net_bridge *br, unsigned long val)
183 br_stp_set_bridge_priority(br, (u16) val);
187 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
188 const char *buf, size_t len)
190 return store_bridge_parm(d, buf, len, set_priority);
192 static DEVICE_ATTR_RW(priority);
194 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
197 return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
199 static DEVICE_ATTR_RO(root_id);
201 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
204 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
206 static DEVICE_ATTR_RO(bridge_id);
208 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
211 return sprintf(buf, "%d\n", to_bridge(d)->root_port);
213 static DEVICE_ATTR_RO(root_port);
215 static ssize_t root_path_cost_show(struct device *d,
216 struct device_attribute *attr, char *buf)
218 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
220 static DEVICE_ATTR_RO(root_path_cost);
222 static ssize_t topology_change_show(struct device *d,
223 struct device_attribute *attr, char *buf)
225 return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
227 static DEVICE_ATTR_RO(topology_change);
229 static ssize_t topology_change_detected_show(struct device *d,
230 struct device_attribute *attr,
233 struct net_bridge *br = to_bridge(d);
234 return sprintf(buf, "%d\n", br->topology_change_detected);
236 static DEVICE_ATTR_RO(topology_change_detected);
238 static ssize_t hello_timer_show(struct device *d,
239 struct device_attribute *attr, char *buf)
241 struct net_bridge *br = to_bridge(d);
242 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
244 static DEVICE_ATTR_RO(hello_timer);
246 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
249 struct net_bridge *br = to_bridge(d);
250 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
252 static DEVICE_ATTR_RO(tcn_timer);
254 static ssize_t topology_change_timer_show(struct device *d,
255 struct device_attribute *attr,
258 struct net_bridge *br = to_bridge(d);
259 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
261 static DEVICE_ATTR_RO(topology_change_timer);
263 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
266 struct net_bridge *br = to_bridge(d);
267 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
269 static DEVICE_ATTR_RO(gc_timer);
271 static ssize_t group_addr_show(struct device *d,
272 struct device_attribute *attr, char *buf)
274 struct net_bridge *br = to_bridge(d);
275 return sprintf(buf, "%pM\n", br->group_addr);
278 static ssize_t group_addr_store(struct device *d,
279 struct device_attribute *attr,
280 const char *buf, size_t len)
282 struct net_bridge *br = to_bridge(d);
285 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
288 if (!mac_pton(buf, new_addr))
291 if (!is_link_local_ether_addr(new_addr))
294 if (new_addr[5] == 1 || /* 802.3x Pause address */
295 new_addr[5] == 2 || /* 802.3ad Slow protocols */
296 new_addr[5] == 3) /* 802.1X PAE address */
300 return restart_syscall();
302 spin_lock_bh(&br->lock);
303 ether_addr_copy(br->group_addr, new_addr);
304 spin_unlock_bh(&br->lock);
306 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
307 br_recalculate_fwd_mask(br);
308 netdev_state_change(br->dev);
315 static DEVICE_ATTR_RW(group_addr);
317 static int set_flush(struct net_bridge *br, unsigned long val)
323 static ssize_t flush_store(struct device *d,
324 struct device_attribute *attr,
325 const char *buf, size_t len)
327 return store_bridge_parm(d, buf, len, set_flush);
329 static DEVICE_ATTR_WO(flush);
331 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
332 static ssize_t multicast_router_show(struct device *d,
333 struct device_attribute *attr, char *buf)
335 struct net_bridge *br = to_bridge(d);
336 return sprintf(buf, "%d\n", br->multicast_router);
339 static ssize_t multicast_router_store(struct device *d,
340 struct device_attribute *attr,
341 const char *buf, size_t len)
343 return store_bridge_parm(d, buf, len, br_multicast_set_router);
345 static DEVICE_ATTR_RW(multicast_router);
347 static ssize_t multicast_snooping_show(struct device *d,
348 struct device_attribute *attr,
351 struct net_bridge *br = to_bridge(d);
352 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
355 static ssize_t multicast_snooping_store(struct device *d,
356 struct device_attribute *attr,
357 const char *buf, size_t len)
359 return store_bridge_parm(d, buf, len, br_multicast_toggle);
361 static DEVICE_ATTR_RW(multicast_snooping);
363 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
364 struct device_attribute *attr,
367 struct net_bridge *br = to_bridge(d);
368 return sprintf(buf, "%d\n",
369 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
372 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
374 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
379 multicast_query_use_ifaddr_store(struct device *d,
380 struct device_attribute *attr,
381 const char *buf, size_t len)
383 return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
385 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
387 static ssize_t multicast_querier_show(struct device *d,
388 struct device_attribute *attr,
391 struct net_bridge *br = to_bridge(d);
392 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_QUERIER));
395 static ssize_t multicast_querier_store(struct device *d,
396 struct device_attribute *attr,
397 const char *buf, size_t len)
399 return store_bridge_parm(d, buf, len, br_multicast_set_querier);
401 static DEVICE_ATTR_RW(multicast_querier);
403 static ssize_t hash_elasticity_show(struct device *d,
404 struct device_attribute *attr, char *buf)
406 struct net_bridge *br = to_bridge(d);
407 return sprintf(buf, "%u\n", br->hash_elasticity);
410 static int set_elasticity(struct net_bridge *br, unsigned long val)
412 br->hash_elasticity = val;
416 static ssize_t hash_elasticity_store(struct device *d,
417 struct device_attribute *attr,
418 const char *buf, size_t len)
420 return store_bridge_parm(d, buf, len, set_elasticity);
422 static DEVICE_ATTR_RW(hash_elasticity);
424 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
427 struct net_bridge *br = to_bridge(d);
428 return sprintf(buf, "%u\n", br->hash_max);
431 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
432 const char *buf, size_t len)
434 return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
436 static DEVICE_ATTR_RW(hash_max);
438 static ssize_t multicast_igmp_version_show(struct device *d,
439 struct device_attribute *attr,
442 struct net_bridge *br = to_bridge(d);
444 return sprintf(buf, "%u\n", br->multicast_igmp_version);
447 static ssize_t multicast_igmp_version_store(struct device *d,
448 struct device_attribute *attr,
449 const char *buf, size_t len)
451 return store_bridge_parm(d, buf, len, br_multicast_set_igmp_version);
453 static DEVICE_ATTR_RW(multicast_igmp_version);
455 static ssize_t multicast_last_member_count_show(struct device *d,
456 struct device_attribute *attr,
459 struct net_bridge *br = to_bridge(d);
460 return sprintf(buf, "%u\n", br->multicast_last_member_count);
463 static int set_last_member_count(struct net_bridge *br, unsigned long val)
465 br->multicast_last_member_count = val;
469 static ssize_t multicast_last_member_count_store(struct device *d,
470 struct device_attribute *attr,
471 const char *buf, size_t len)
473 return store_bridge_parm(d, buf, len, set_last_member_count);
475 static DEVICE_ATTR_RW(multicast_last_member_count);
477 static ssize_t multicast_startup_query_count_show(
478 struct device *d, struct device_attribute *attr, char *buf)
480 struct net_bridge *br = to_bridge(d);
481 return sprintf(buf, "%u\n", br->multicast_startup_query_count);
484 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
486 br->multicast_startup_query_count = val;
490 static ssize_t multicast_startup_query_count_store(
491 struct device *d, struct device_attribute *attr, const char *buf,
494 return store_bridge_parm(d, buf, len, set_startup_query_count);
496 static DEVICE_ATTR_RW(multicast_startup_query_count);
498 static ssize_t multicast_last_member_interval_show(
499 struct device *d, struct device_attribute *attr, char *buf)
501 struct net_bridge *br = to_bridge(d);
502 return sprintf(buf, "%lu\n",
503 jiffies_to_clock_t(br->multicast_last_member_interval));
506 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
508 br->multicast_last_member_interval = clock_t_to_jiffies(val);
512 static ssize_t multicast_last_member_interval_store(
513 struct device *d, struct device_attribute *attr, const char *buf,
516 return store_bridge_parm(d, buf, len, set_last_member_interval);
518 static DEVICE_ATTR_RW(multicast_last_member_interval);
520 static ssize_t multicast_membership_interval_show(
521 struct device *d, struct device_attribute *attr, char *buf)
523 struct net_bridge *br = to_bridge(d);
524 return sprintf(buf, "%lu\n",
525 jiffies_to_clock_t(br->multicast_membership_interval));
528 static int set_membership_interval(struct net_bridge *br, unsigned long val)
530 br->multicast_membership_interval = clock_t_to_jiffies(val);
534 static ssize_t multicast_membership_interval_store(
535 struct device *d, struct device_attribute *attr, const char *buf,
538 return store_bridge_parm(d, buf, len, set_membership_interval);
540 static DEVICE_ATTR_RW(multicast_membership_interval);
542 static ssize_t multicast_querier_interval_show(struct device *d,
543 struct device_attribute *attr,
546 struct net_bridge *br = to_bridge(d);
547 return sprintf(buf, "%lu\n",
548 jiffies_to_clock_t(br->multicast_querier_interval));
551 static int set_querier_interval(struct net_bridge *br, unsigned long val)
553 br->multicast_querier_interval = clock_t_to_jiffies(val);
557 static ssize_t multicast_querier_interval_store(struct device *d,
558 struct device_attribute *attr,
559 const char *buf, size_t len)
561 return store_bridge_parm(d, buf, len, set_querier_interval);
563 static DEVICE_ATTR_RW(multicast_querier_interval);
565 static ssize_t multicast_query_interval_show(struct device *d,
566 struct device_attribute *attr,
569 struct net_bridge *br = to_bridge(d);
570 return sprintf(buf, "%lu\n",
571 jiffies_to_clock_t(br->multicast_query_interval));
574 static int set_query_interval(struct net_bridge *br, unsigned long val)
576 br->multicast_query_interval = clock_t_to_jiffies(val);
580 static ssize_t multicast_query_interval_store(struct device *d,
581 struct device_attribute *attr,
582 const char *buf, size_t len)
584 return store_bridge_parm(d, buf, len, set_query_interval);
586 static DEVICE_ATTR_RW(multicast_query_interval);
588 static ssize_t multicast_query_response_interval_show(
589 struct device *d, struct device_attribute *attr, char *buf)
591 struct net_bridge *br = to_bridge(d);
594 jiffies_to_clock_t(br->multicast_query_response_interval));
597 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
599 br->multicast_query_response_interval = clock_t_to_jiffies(val);
603 static ssize_t multicast_query_response_interval_store(
604 struct device *d, struct device_attribute *attr, const char *buf,
607 return store_bridge_parm(d, buf, len, set_query_response_interval);
609 static DEVICE_ATTR_RW(multicast_query_response_interval);
611 static ssize_t multicast_startup_query_interval_show(
612 struct device *d, struct device_attribute *attr, char *buf)
614 struct net_bridge *br = to_bridge(d);
617 jiffies_to_clock_t(br->multicast_startup_query_interval));
620 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
622 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
626 static ssize_t multicast_startup_query_interval_store(
627 struct device *d, struct device_attribute *attr, const char *buf,
630 return store_bridge_parm(d, buf, len, set_startup_query_interval);
632 static DEVICE_ATTR_RW(multicast_startup_query_interval);
634 static ssize_t multicast_stats_enabled_show(struct device *d,
635 struct device_attribute *attr,
638 struct net_bridge *br = to_bridge(d);
640 return sprintf(buf, "%d\n",
641 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
644 static int set_stats_enabled(struct net_bridge *br, unsigned long val)
646 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
650 static ssize_t multicast_stats_enabled_store(struct device *d,
651 struct device_attribute *attr,
655 return store_bridge_parm(d, buf, len, set_stats_enabled);
657 static DEVICE_ATTR_RW(multicast_stats_enabled);
659 #if IS_ENABLED(CONFIG_IPV6)
660 static ssize_t multicast_mld_version_show(struct device *d,
661 struct device_attribute *attr,
664 struct net_bridge *br = to_bridge(d);
666 return sprintf(buf, "%u\n", br->multicast_mld_version);
669 static ssize_t multicast_mld_version_store(struct device *d,
670 struct device_attribute *attr,
671 const char *buf, size_t len)
673 return store_bridge_parm(d, buf, len, br_multicast_set_mld_version);
675 static DEVICE_ATTR_RW(multicast_mld_version);
678 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
679 static ssize_t nf_call_iptables_show(
680 struct device *d, struct device_attribute *attr, char *buf)
682 struct net_bridge *br = to_bridge(d);
683 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
686 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
688 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
692 static ssize_t nf_call_iptables_store(
693 struct device *d, struct device_attribute *attr, const char *buf,
696 return store_bridge_parm(d, buf, len, set_nf_call_iptables);
698 static DEVICE_ATTR_RW(nf_call_iptables);
700 static ssize_t nf_call_ip6tables_show(
701 struct device *d, struct device_attribute *attr, char *buf)
703 struct net_bridge *br = to_bridge(d);
704 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
707 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
709 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
713 static ssize_t nf_call_ip6tables_store(
714 struct device *d, struct device_attribute *attr, const char *buf,
717 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
719 static DEVICE_ATTR_RW(nf_call_ip6tables);
721 static ssize_t nf_call_arptables_show(
722 struct device *d, struct device_attribute *attr, char *buf)
724 struct net_bridge *br = to_bridge(d);
725 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
728 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
730 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
734 static ssize_t nf_call_arptables_store(
735 struct device *d, struct device_attribute *attr, const char *buf,
738 return store_bridge_parm(d, buf, len, set_nf_call_arptables);
740 static DEVICE_ATTR_RW(nf_call_arptables);
742 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
743 static ssize_t vlan_filtering_show(struct device *d,
744 struct device_attribute *attr,
747 struct net_bridge *br = to_bridge(d);
748 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
751 static ssize_t vlan_filtering_store(struct device *d,
752 struct device_attribute *attr,
753 const char *buf, size_t len)
755 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
757 static DEVICE_ATTR_RW(vlan_filtering);
759 static ssize_t vlan_protocol_show(struct device *d,
760 struct device_attribute *attr,
763 struct net_bridge *br = to_bridge(d);
764 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
767 static ssize_t vlan_protocol_store(struct device *d,
768 struct device_attribute *attr,
769 const char *buf, size_t len)
771 return store_bridge_parm(d, buf, len, br_vlan_set_proto);
773 static DEVICE_ATTR_RW(vlan_protocol);
775 static ssize_t default_pvid_show(struct device *d,
776 struct device_attribute *attr,
779 struct net_bridge *br = to_bridge(d);
780 return sprintf(buf, "%d\n", br->default_pvid);
783 static ssize_t default_pvid_store(struct device *d,
784 struct device_attribute *attr,
785 const char *buf, size_t len)
787 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
789 static DEVICE_ATTR_RW(default_pvid);
791 static ssize_t vlan_stats_enabled_show(struct device *d,
792 struct device_attribute *attr,
795 struct net_bridge *br = to_bridge(d);
796 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
799 static ssize_t vlan_stats_enabled_store(struct device *d,
800 struct device_attribute *attr,
801 const char *buf, size_t len)
803 return store_bridge_parm(d, buf, len, br_vlan_set_stats);
805 static DEVICE_ATTR_RW(vlan_stats_enabled);
807 static ssize_t vlan_stats_per_port_show(struct device *d,
808 struct device_attribute *attr,
811 struct net_bridge *br = to_bridge(d);
812 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
815 static ssize_t vlan_stats_per_port_store(struct device *d,
816 struct device_attribute *attr,
817 const char *buf, size_t len)
819 return store_bridge_parm(d, buf, len, br_vlan_set_stats_per_port);
821 static DEVICE_ATTR_RW(vlan_stats_per_port);
824 static struct attribute *bridge_attrs[] = {
825 &dev_attr_forward_delay.attr,
826 &dev_attr_hello_time.attr,
827 &dev_attr_max_age.attr,
828 &dev_attr_ageing_time.attr,
829 &dev_attr_stp_state.attr,
830 &dev_attr_group_fwd_mask.attr,
831 &dev_attr_priority.attr,
832 &dev_attr_bridge_id.attr,
833 &dev_attr_root_id.attr,
834 &dev_attr_root_path_cost.attr,
835 &dev_attr_root_port.attr,
836 &dev_attr_topology_change.attr,
837 &dev_attr_topology_change_detected.attr,
838 &dev_attr_hello_timer.attr,
839 &dev_attr_tcn_timer.attr,
840 &dev_attr_topology_change_timer.attr,
841 &dev_attr_gc_timer.attr,
842 &dev_attr_group_addr.attr,
843 &dev_attr_flush.attr,
844 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
845 &dev_attr_multicast_router.attr,
846 &dev_attr_multicast_snooping.attr,
847 &dev_attr_multicast_querier.attr,
848 &dev_attr_multicast_query_use_ifaddr.attr,
849 &dev_attr_hash_elasticity.attr,
850 &dev_attr_hash_max.attr,
851 &dev_attr_multicast_last_member_count.attr,
852 &dev_attr_multicast_startup_query_count.attr,
853 &dev_attr_multicast_last_member_interval.attr,
854 &dev_attr_multicast_membership_interval.attr,
855 &dev_attr_multicast_querier_interval.attr,
856 &dev_attr_multicast_query_interval.attr,
857 &dev_attr_multicast_query_response_interval.attr,
858 &dev_attr_multicast_startup_query_interval.attr,
859 &dev_attr_multicast_stats_enabled.attr,
860 &dev_attr_multicast_igmp_version.attr,
861 #if IS_ENABLED(CONFIG_IPV6)
862 &dev_attr_multicast_mld_version.attr,
865 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
866 &dev_attr_nf_call_iptables.attr,
867 &dev_attr_nf_call_ip6tables.attr,
868 &dev_attr_nf_call_arptables.attr,
870 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
871 &dev_attr_vlan_filtering.attr,
872 &dev_attr_vlan_protocol.attr,
873 &dev_attr_default_pvid.attr,
874 &dev_attr_vlan_stats_enabled.attr,
875 &dev_attr_vlan_stats_per_port.attr,
880 static const struct attribute_group bridge_group = {
881 .name = SYSFS_BRIDGE_ATTR,
882 .attrs = bridge_attrs,
886 * Export the forwarding information table as a binary file
887 * The records are struct __fdb_entry.
889 * Returns the number of bytes read.
891 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
892 struct bin_attribute *bin_attr,
893 char *buf, loff_t off, size_t count)
895 struct device *dev = kobj_to_dev(kobj);
896 struct net_bridge *br = to_bridge(dev);
899 /* must read whole records */
900 if (off % sizeof(struct __fdb_entry) != 0)
903 n = br_fdb_fillbuf(br, buf,
904 count / sizeof(struct __fdb_entry),
905 off / sizeof(struct __fdb_entry));
908 n *= sizeof(struct __fdb_entry);
913 static struct bin_attribute bridge_forward = {
914 .attr = { .name = SYSFS_BRIDGE_FDB,
916 .read = brforward_read,
920 * Add entries in sysfs onto the existing network class device
922 * Adds a attribute group "bridge" containing tuning parameters.
923 * Binary attribute containing the forward table
924 * Sub directory to hold links to interfaces.
926 * Note: the ifobj exists only to be a subdirectory
927 * to hold links. The ifobj exists in same data structure
928 * as it's parent the bridge so reference counting works.
930 int br_sysfs_addbr(struct net_device *dev)
932 struct kobject *brobj = &dev->dev.kobj;
933 struct net_bridge *br = netdev_priv(dev);
936 err = sysfs_create_group(brobj, &bridge_group);
938 pr_info("%s: can't create group %s/%s\n",
939 __func__, dev->name, bridge_group.name);
943 err = sysfs_create_bin_file(brobj, &bridge_forward);
945 pr_info("%s: can't create attribute file %s/%s\n",
946 __func__, dev->name, bridge_forward.attr.name);
950 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
952 pr_info("%s: can't add kobject (directory) %s/%s\n",
953 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
959 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
961 sysfs_remove_group(&dev->dev.kobj, &bridge_group);
967 void br_sysfs_delbr(struct net_device *dev)
969 struct kobject *kobj = &dev->dev.kobj;
970 struct net_bridge *br = netdev_priv(dev);
972 kobject_put(br->ifobj);
973 sysfs_remove_bin_file(kobj, &bridge_forward);
974 sysfs_remove_group(kobj, &bridge_group);