1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Sysfs attributes of bridge
4 * Linux ethernet bridge
7 * Stephen Hemminger <shemminger@osdl.org>
10 #include <linux/capability.h>
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/if_bridge.h>
15 #include <linux/rtnetlink.h>
16 #include <linux/spinlock.h>
17 #include <linux/times.h>
18 #include <linux/sched/signal.h>
20 #include "br_private.h"
22 #define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
25 * Common code for storing bridge parameters.
27 static ssize_t store_bridge_parm(struct device *d,
28 const char *buf, size_t len,
29 int (*set)(struct net_bridge *, unsigned long))
31 struct net_bridge *br = to_bridge(d);
36 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
39 val = simple_strtoul(buf, &endp, 0);
44 return restart_syscall();
46 err = (*set)(br, val);
48 netdev_state_change(br->dev);
51 return err ? err : len;
55 static ssize_t forward_delay_show(struct device *d,
56 struct device_attribute *attr, char *buf)
58 struct net_bridge *br = to_bridge(d);
59 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
62 static ssize_t forward_delay_store(struct device *d,
63 struct device_attribute *attr,
64 const char *buf, size_t len)
66 return store_bridge_parm(d, buf, len, br_set_forward_delay);
68 static DEVICE_ATTR_RW(forward_delay);
70 static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
73 return sprintf(buf, "%lu\n",
74 jiffies_to_clock_t(to_bridge(d)->hello_time));
77 static ssize_t hello_time_store(struct device *d,
78 struct device_attribute *attr, const char *buf,
81 return store_bridge_parm(d, buf, len, br_set_hello_time);
83 static DEVICE_ATTR_RW(hello_time);
85 static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
88 return sprintf(buf, "%lu\n",
89 jiffies_to_clock_t(to_bridge(d)->max_age));
92 static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
93 const char *buf, size_t len)
95 return store_bridge_parm(d, buf, len, br_set_max_age);
97 static DEVICE_ATTR_RW(max_age);
99 static ssize_t ageing_time_show(struct device *d,
100 struct device_attribute *attr, char *buf)
102 struct net_bridge *br = to_bridge(d);
103 return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
106 static int set_ageing_time(struct net_bridge *br, unsigned long val)
108 return br_set_ageing_time(br, val);
111 static ssize_t ageing_time_store(struct device *d,
112 struct device_attribute *attr,
113 const char *buf, size_t len)
115 return store_bridge_parm(d, buf, len, set_ageing_time);
117 static DEVICE_ATTR_RW(ageing_time);
119 static ssize_t stp_state_show(struct device *d,
120 struct device_attribute *attr, char *buf)
122 struct net_bridge *br = to_bridge(d);
123 return sprintf(buf, "%d\n", br->stp_enabled);
127 static int set_stp_state(struct net_bridge *br, unsigned long val)
129 return br_stp_set_enabled(br, val, NULL);
132 static ssize_t stp_state_store(struct device *d,
133 struct device_attribute *attr, const char *buf,
136 return store_bridge_parm(d, buf, len, set_stp_state);
138 static DEVICE_ATTR_RW(stp_state);
140 static ssize_t group_fwd_mask_show(struct device *d,
141 struct device_attribute *attr,
144 struct net_bridge *br = to_bridge(d);
145 return sprintf(buf, "%#x\n", br->group_fwd_mask);
148 static int set_group_fwd_mask(struct net_bridge *br, unsigned long val)
150 if (val & BR_GROUPFWD_RESTRICTED)
153 br->group_fwd_mask = val;
158 static ssize_t group_fwd_mask_store(struct device *d,
159 struct device_attribute *attr,
163 return store_bridge_parm(d, buf, len, set_group_fwd_mask);
165 static DEVICE_ATTR_RW(group_fwd_mask);
167 static ssize_t priority_show(struct device *d, struct device_attribute *attr,
170 struct net_bridge *br = to_bridge(d);
171 return sprintf(buf, "%d\n",
172 (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
175 static int set_priority(struct net_bridge *br, unsigned long val)
177 br_stp_set_bridge_priority(br, (u16) val);
181 static ssize_t priority_store(struct device *d, struct device_attribute *attr,
182 const char *buf, size_t len)
184 return store_bridge_parm(d, buf, len, set_priority);
186 static DEVICE_ATTR_RW(priority);
188 static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
191 return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
193 static DEVICE_ATTR_RO(root_id);
195 static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
198 return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
200 static DEVICE_ATTR_RO(bridge_id);
202 static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
205 return sprintf(buf, "%d\n", to_bridge(d)->root_port);
207 static DEVICE_ATTR_RO(root_port);
209 static ssize_t root_path_cost_show(struct device *d,
210 struct device_attribute *attr, char *buf)
212 return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
214 static DEVICE_ATTR_RO(root_path_cost);
216 static ssize_t topology_change_show(struct device *d,
217 struct device_attribute *attr, char *buf)
219 return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
221 static DEVICE_ATTR_RO(topology_change);
223 static ssize_t topology_change_detected_show(struct device *d,
224 struct device_attribute *attr,
227 struct net_bridge *br = to_bridge(d);
228 return sprintf(buf, "%d\n", br->topology_change_detected);
230 static DEVICE_ATTR_RO(topology_change_detected);
232 static ssize_t hello_timer_show(struct device *d,
233 struct device_attribute *attr, char *buf)
235 struct net_bridge *br = to_bridge(d);
236 return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
238 static DEVICE_ATTR_RO(hello_timer);
240 static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
243 struct net_bridge *br = to_bridge(d);
244 return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
246 static DEVICE_ATTR_RO(tcn_timer);
248 static ssize_t topology_change_timer_show(struct device *d,
249 struct device_attribute *attr,
252 struct net_bridge *br = to_bridge(d);
253 return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
255 static DEVICE_ATTR_RO(topology_change_timer);
257 static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
260 struct net_bridge *br = to_bridge(d);
261 return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
263 static DEVICE_ATTR_RO(gc_timer);
265 static ssize_t group_addr_show(struct device *d,
266 struct device_attribute *attr, char *buf)
268 struct net_bridge *br = to_bridge(d);
269 return sprintf(buf, "%pM\n", br->group_addr);
272 static ssize_t group_addr_store(struct device *d,
273 struct device_attribute *attr,
274 const char *buf, size_t len)
276 struct net_bridge *br = to_bridge(d);
279 if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
282 if (!mac_pton(buf, new_addr))
285 if (!is_link_local_ether_addr(new_addr))
288 if (new_addr[5] == 1 || /* 802.3x Pause address */
289 new_addr[5] == 2 || /* 802.3ad Slow protocols */
290 new_addr[5] == 3) /* 802.1X PAE address */
294 return restart_syscall();
296 spin_lock_bh(&br->lock);
297 ether_addr_copy(br->group_addr, new_addr);
298 spin_unlock_bh(&br->lock);
300 br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
301 br_recalculate_fwd_mask(br);
302 netdev_state_change(br->dev);
309 static DEVICE_ATTR_RW(group_addr);
311 static int set_flush(struct net_bridge *br, unsigned long val)
317 static ssize_t flush_store(struct device *d,
318 struct device_attribute *attr,
319 const char *buf, size_t len)
321 return store_bridge_parm(d, buf, len, set_flush);
323 static DEVICE_ATTR_WO(flush);
325 static ssize_t no_linklocal_learn_show(struct device *d,
326 struct device_attribute *attr,
329 struct net_bridge *br = to_bridge(d);
330 return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
333 static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val)
335 return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, NULL);
338 static ssize_t no_linklocal_learn_store(struct device *d,
339 struct device_attribute *attr,
340 const char *buf, size_t len)
342 return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
344 static DEVICE_ATTR_RW(no_linklocal_learn);
346 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
347 static ssize_t multicast_router_show(struct device *d,
348 struct device_attribute *attr, char *buf)
350 struct net_bridge *br = to_bridge(d);
351 return sprintf(buf, "%d\n", br->multicast_router);
354 static ssize_t multicast_router_store(struct device *d,
355 struct device_attribute *attr,
356 const char *buf, size_t len)
358 return store_bridge_parm(d, buf, len, br_multicast_set_router);
360 static DEVICE_ATTR_RW(multicast_router);
362 static ssize_t multicast_snooping_show(struct device *d,
363 struct device_attribute *attr,
366 struct net_bridge *br = to_bridge(d);
367 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
370 static ssize_t multicast_snooping_store(struct device *d,
371 struct device_attribute *attr,
372 const char *buf, size_t len)
374 return store_bridge_parm(d, buf, len, br_multicast_toggle);
376 static DEVICE_ATTR_RW(multicast_snooping);
378 static ssize_t multicast_query_use_ifaddr_show(struct device *d,
379 struct device_attribute *attr,
382 struct net_bridge *br = to_bridge(d);
383 return sprintf(buf, "%d\n",
384 br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
387 static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val)
389 br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
394 multicast_query_use_ifaddr_store(struct device *d,
395 struct device_attribute *attr,
396 const char *buf, size_t len)
398 return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
400 static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
402 static ssize_t multicast_querier_show(struct device *d,
403 struct device_attribute *attr,
406 struct net_bridge *br = to_bridge(d);
407 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_QUERIER));
410 static ssize_t multicast_querier_store(struct device *d,
411 struct device_attribute *attr,
412 const char *buf, size_t len)
414 return store_bridge_parm(d, buf, len, br_multicast_set_querier);
416 static DEVICE_ATTR_RW(multicast_querier);
418 static ssize_t hash_elasticity_show(struct device *d,
419 struct device_attribute *attr, char *buf)
421 return sprintf(buf, "%u\n", RHT_ELASTICITY);
424 static int set_elasticity(struct net_bridge *br, unsigned long val)
426 br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
431 static ssize_t hash_elasticity_store(struct device *d,
432 struct device_attribute *attr,
433 const char *buf, size_t len)
435 return store_bridge_parm(d, buf, len, set_elasticity);
437 static DEVICE_ATTR_RW(hash_elasticity);
439 static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
442 struct net_bridge *br = to_bridge(d);
443 return sprintf(buf, "%u\n", br->hash_max);
446 static int set_hash_max(struct net_bridge *br, unsigned long val)
452 static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
453 const char *buf, size_t len)
455 return store_bridge_parm(d, buf, len, set_hash_max);
457 static DEVICE_ATTR_RW(hash_max);
459 static ssize_t multicast_igmp_version_show(struct device *d,
460 struct device_attribute *attr,
463 struct net_bridge *br = to_bridge(d);
465 return sprintf(buf, "%u\n", br->multicast_igmp_version);
468 static ssize_t multicast_igmp_version_store(struct device *d,
469 struct device_attribute *attr,
470 const char *buf, size_t len)
472 return store_bridge_parm(d, buf, len, br_multicast_set_igmp_version);
474 static DEVICE_ATTR_RW(multicast_igmp_version);
476 static ssize_t multicast_last_member_count_show(struct device *d,
477 struct device_attribute *attr,
480 struct net_bridge *br = to_bridge(d);
481 return sprintf(buf, "%u\n", br->multicast_last_member_count);
484 static int set_last_member_count(struct net_bridge *br, unsigned long val)
486 br->multicast_last_member_count = val;
490 static ssize_t multicast_last_member_count_store(struct device *d,
491 struct device_attribute *attr,
492 const char *buf, size_t len)
494 return store_bridge_parm(d, buf, len, set_last_member_count);
496 static DEVICE_ATTR_RW(multicast_last_member_count);
498 static ssize_t multicast_startup_query_count_show(
499 struct device *d, struct device_attribute *attr, char *buf)
501 struct net_bridge *br = to_bridge(d);
502 return sprintf(buf, "%u\n", br->multicast_startup_query_count);
505 static int set_startup_query_count(struct net_bridge *br, unsigned long val)
507 br->multicast_startup_query_count = val;
511 static ssize_t multicast_startup_query_count_store(
512 struct device *d, struct device_attribute *attr, const char *buf,
515 return store_bridge_parm(d, buf, len, set_startup_query_count);
517 static DEVICE_ATTR_RW(multicast_startup_query_count);
519 static ssize_t multicast_last_member_interval_show(
520 struct device *d, struct device_attribute *attr, char *buf)
522 struct net_bridge *br = to_bridge(d);
523 return sprintf(buf, "%lu\n",
524 jiffies_to_clock_t(br->multicast_last_member_interval));
527 static int set_last_member_interval(struct net_bridge *br, unsigned long val)
529 br->multicast_last_member_interval = clock_t_to_jiffies(val);
533 static ssize_t multicast_last_member_interval_store(
534 struct device *d, struct device_attribute *attr, const char *buf,
537 return store_bridge_parm(d, buf, len, set_last_member_interval);
539 static DEVICE_ATTR_RW(multicast_last_member_interval);
541 static ssize_t multicast_membership_interval_show(
542 struct device *d, struct device_attribute *attr, char *buf)
544 struct net_bridge *br = to_bridge(d);
545 return sprintf(buf, "%lu\n",
546 jiffies_to_clock_t(br->multicast_membership_interval));
549 static int set_membership_interval(struct net_bridge *br, unsigned long val)
551 br->multicast_membership_interval = clock_t_to_jiffies(val);
555 static ssize_t multicast_membership_interval_store(
556 struct device *d, struct device_attribute *attr, const char *buf,
559 return store_bridge_parm(d, buf, len, set_membership_interval);
561 static DEVICE_ATTR_RW(multicast_membership_interval);
563 static ssize_t multicast_querier_interval_show(struct device *d,
564 struct device_attribute *attr,
567 struct net_bridge *br = to_bridge(d);
568 return sprintf(buf, "%lu\n",
569 jiffies_to_clock_t(br->multicast_querier_interval));
572 static int set_querier_interval(struct net_bridge *br, unsigned long val)
574 br->multicast_querier_interval = clock_t_to_jiffies(val);
578 static ssize_t multicast_querier_interval_store(struct device *d,
579 struct device_attribute *attr,
580 const char *buf, size_t len)
582 return store_bridge_parm(d, buf, len, set_querier_interval);
584 static DEVICE_ATTR_RW(multicast_querier_interval);
586 static ssize_t multicast_query_interval_show(struct device *d,
587 struct device_attribute *attr,
590 struct net_bridge *br = to_bridge(d);
591 return sprintf(buf, "%lu\n",
592 jiffies_to_clock_t(br->multicast_query_interval));
595 static int set_query_interval(struct net_bridge *br, unsigned long val)
597 br->multicast_query_interval = clock_t_to_jiffies(val);
601 static ssize_t multicast_query_interval_store(struct device *d,
602 struct device_attribute *attr,
603 const char *buf, size_t len)
605 return store_bridge_parm(d, buf, len, set_query_interval);
607 static DEVICE_ATTR_RW(multicast_query_interval);
609 static ssize_t multicast_query_response_interval_show(
610 struct device *d, struct device_attribute *attr, char *buf)
612 struct net_bridge *br = to_bridge(d);
615 jiffies_to_clock_t(br->multicast_query_response_interval));
618 static int set_query_response_interval(struct net_bridge *br, unsigned long val)
620 br->multicast_query_response_interval = clock_t_to_jiffies(val);
624 static ssize_t multicast_query_response_interval_store(
625 struct device *d, struct device_attribute *attr, const char *buf,
628 return store_bridge_parm(d, buf, len, set_query_response_interval);
630 static DEVICE_ATTR_RW(multicast_query_response_interval);
632 static ssize_t multicast_startup_query_interval_show(
633 struct device *d, struct device_attribute *attr, char *buf)
635 struct net_bridge *br = to_bridge(d);
638 jiffies_to_clock_t(br->multicast_startup_query_interval));
641 static int set_startup_query_interval(struct net_bridge *br, unsigned long val)
643 br->multicast_startup_query_interval = clock_t_to_jiffies(val);
647 static ssize_t multicast_startup_query_interval_store(
648 struct device *d, struct device_attribute *attr, const char *buf,
651 return store_bridge_parm(d, buf, len, set_startup_query_interval);
653 static DEVICE_ATTR_RW(multicast_startup_query_interval);
655 static ssize_t multicast_stats_enabled_show(struct device *d,
656 struct device_attribute *attr,
659 struct net_bridge *br = to_bridge(d);
661 return sprintf(buf, "%d\n",
662 br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
665 static int set_stats_enabled(struct net_bridge *br, unsigned long val)
667 br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
671 static ssize_t multicast_stats_enabled_store(struct device *d,
672 struct device_attribute *attr,
676 return store_bridge_parm(d, buf, len, set_stats_enabled);
678 static DEVICE_ATTR_RW(multicast_stats_enabled);
680 #if IS_ENABLED(CONFIG_IPV6)
681 static ssize_t multicast_mld_version_show(struct device *d,
682 struct device_attribute *attr,
685 struct net_bridge *br = to_bridge(d);
687 return sprintf(buf, "%u\n", br->multicast_mld_version);
690 static ssize_t multicast_mld_version_store(struct device *d,
691 struct device_attribute *attr,
692 const char *buf, size_t len)
694 return store_bridge_parm(d, buf, len, br_multicast_set_mld_version);
696 static DEVICE_ATTR_RW(multicast_mld_version);
699 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
700 static ssize_t nf_call_iptables_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_IPTABLES));
707 static int set_nf_call_iptables(struct net_bridge *br, unsigned long val)
709 br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
713 static ssize_t nf_call_iptables_store(
714 struct device *d, struct device_attribute *attr, const char *buf,
717 return store_bridge_parm(d, buf, len, set_nf_call_iptables);
719 static DEVICE_ATTR_RW(nf_call_iptables);
721 static ssize_t nf_call_ip6tables_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_IP6TABLES));
728 static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val)
730 br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
734 static ssize_t nf_call_ip6tables_store(
735 struct device *d, struct device_attribute *attr, const char *buf,
738 return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
740 static DEVICE_ATTR_RW(nf_call_ip6tables);
742 static ssize_t nf_call_arptables_show(
743 struct device *d, struct device_attribute *attr, char *buf)
745 struct net_bridge *br = to_bridge(d);
746 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
749 static int set_nf_call_arptables(struct net_bridge *br, unsigned long val)
751 br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
755 static ssize_t nf_call_arptables_store(
756 struct device *d, struct device_attribute *attr, const char *buf,
759 return store_bridge_parm(d, buf, len, set_nf_call_arptables);
761 static DEVICE_ATTR_RW(nf_call_arptables);
763 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
764 static ssize_t vlan_filtering_show(struct device *d,
765 struct device_attribute *attr,
768 struct net_bridge *br = to_bridge(d);
769 return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
772 static ssize_t vlan_filtering_store(struct device *d,
773 struct device_attribute *attr,
774 const char *buf, size_t len)
776 return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
778 static DEVICE_ATTR_RW(vlan_filtering);
780 static ssize_t vlan_protocol_show(struct device *d,
781 struct device_attribute *attr,
784 struct net_bridge *br = to_bridge(d);
785 return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
788 static ssize_t vlan_protocol_store(struct device *d,
789 struct device_attribute *attr,
790 const char *buf, size_t len)
792 return store_bridge_parm(d, buf, len, br_vlan_set_proto);
794 static DEVICE_ATTR_RW(vlan_protocol);
796 static ssize_t default_pvid_show(struct device *d,
797 struct device_attribute *attr,
800 struct net_bridge *br = to_bridge(d);
801 return sprintf(buf, "%d\n", br->default_pvid);
804 static ssize_t default_pvid_store(struct device *d,
805 struct device_attribute *attr,
806 const char *buf, size_t len)
808 return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
810 static DEVICE_ATTR_RW(default_pvid);
812 static ssize_t vlan_stats_enabled_show(struct device *d,
813 struct device_attribute *attr,
816 struct net_bridge *br = to_bridge(d);
817 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
820 static ssize_t vlan_stats_enabled_store(struct device *d,
821 struct device_attribute *attr,
822 const char *buf, size_t len)
824 return store_bridge_parm(d, buf, len, br_vlan_set_stats);
826 static DEVICE_ATTR_RW(vlan_stats_enabled);
828 static ssize_t vlan_stats_per_port_show(struct device *d,
829 struct device_attribute *attr,
832 struct net_bridge *br = to_bridge(d);
833 return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
836 static ssize_t vlan_stats_per_port_store(struct device *d,
837 struct device_attribute *attr,
838 const char *buf, size_t len)
840 return store_bridge_parm(d, buf, len, br_vlan_set_stats_per_port);
842 static DEVICE_ATTR_RW(vlan_stats_per_port);
845 static struct attribute *bridge_attrs[] = {
846 &dev_attr_forward_delay.attr,
847 &dev_attr_hello_time.attr,
848 &dev_attr_max_age.attr,
849 &dev_attr_ageing_time.attr,
850 &dev_attr_stp_state.attr,
851 &dev_attr_group_fwd_mask.attr,
852 &dev_attr_priority.attr,
853 &dev_attr_bridge_id.attr,
854 &dev_attr_root_id.attr,
855 &dev_attr_root_path_cost.attr,
856 &dev_attr_root_port.attr,
857 &dev_attr_topology_change.attr,
858 &dev_attr_topology_change_detected.attr,
859 &dev_attr_hello_timer.attr,
860 &dev_attr_tcn_timer.attr,
861 &dev_attr_topology_change_timer.attr,
862 &dev_attr_gc_timer.attr,
863 &dev_attr_group_addr.attr,
864 &dev_attr_flush.attr,
865 &dev_attr_no_linklocal_learn.attr,
866 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
867 &dev_attr_multicast_router.attr,
868 &dev_attr_multicast_snooping.attr,
869 &dev_attr_multicast_querier.attr,
870 &dev_attr_multicast_query_use_ifaddr.attr,
871 &dev_attr_hash_elasticity.attr,
872 &dev_attr_hash_max.attr,
873 &dev_attr_multicast_last_member_count.attr,
874 &dev_attr_multicast_startup_query_count.attr,
875 &dev_attr_multicast_last_member_interval.attr,
876 &dev_attr_multicast_membership_interval.attr,
877 &dev_attr_multicast_querier_interval.attr,
878 &dev_attr_multicast_query_interval.attr,
879 &dev_attr_multicast_query_response_interval.attr,
880 &dev_attr_multicast_startup_query_interval.attr,
881 &dev_attr_multicast_stats_enabled.attr,
882 &dev_attr_multicast_igmp_version.attr,
883 #if IS_ENABLED(CONFIG_IPV6)
884 &dev_attr_multicast_mld_version.attr,
887 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
888 &dev_attr_nf_call_iptables.attr,
889 &dev_attr_nf_call_ip6tables.attr,
890 &dev_attr_nf_call_arptables.attr,
892 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
893 &dev_attr_vlan_filtering.attr,
894 &dev_attr_vlan_protocol.attr,
895 &dev_attr_default_pvid.attr,
896 &dev_attr_vlan_stats_enabled.attr,
897 &dev_attr_vlan_stats_per_port.attr,
902 static const struct attribute_group bridge_group = {
903 .name = SYSFS_BRIDGE_ATTR,
904 .attrs = bridge_attrs,
908 * Export the forwarding information table as a binary file
909 * The records are struct __fdb_entry.
911 * Returns the number of bytes read.
913 static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
914 struct bin_attribute *bin_attr,
915 char *buf, loff_t off, size_t count)
917 struct device *dev = kobj_to_dev(kobj);
918 struct net_bridge *br = to_bridge(dev);
921 /* must read whole records */
922 if (off % sizeof(struct __fdb_entry) != 0)
925 n = br_fdb_fillbuf(br, buf,
926 count / sizeof(struct __fdb_entry),
927 off / sizeof(struct __fdb_entry));
930 n *= sizeof(struct __fdb_entry);
935 static struct bin_attribute bridge_forward = {
936 .attr = { .name = SYSFS_BRIDGE_FDB,
938 .read = brforward_read,
942 * Add entries in sysfs onto the existing network class device
944 * Adds a attribute group "bridge" containing tuning parameters.
945 * Binary attribute containing the forward table
946 * Sub directory to hold links to interfaces.
948 * Note: the ifobj exists only to be a subdirectory
949 * to hold links. The ifobj exists in same data structure
950 * as it's parent the bridge so reference counting works.
952 int br_sysfs_addbr(struct net_device *dev)
954 struct kobject *brobj = &dev->dev.kobj;
955 struct net_bridge *br = netdev_priv(dev);
958 err = sysfs_create_group(brobj, &bridge_group);
960 pr_info("%s: can't create group %s/%s\n",
961 __func__, dev->name, bridge_group.name);
965 err = sysfs_create_bin_file(brobj, &bridge_forward);
967 pr_info("%s: can't create attribute file %s/%s\n",
968 __func__, dev->name, bridge_forward.attr.name);
972 br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
974 pr_info("%s: can't add kobject (directory) %s/%s\n",
975 __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
981 sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
983 sysfs_remove_group(&dev->dev.kobj, &bridge_group);
989 void br_sysfs_delbr(struct net_device *dev)
991 struct kobject *kobj = &dev->dev.kobj;
992 struct net_bridge *br = netdev_priv(dev);
994 kobject_put(br->ifobj);
995 sysfs_remove_bin_file(kobj, &bridge_forward);
996 sysfs_remove_group(kobj, &bridge_group);