2 * Linux ethernet bridge
5 * Lennert Buytenhek <buytenh@gnu.org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <linux/netpoll.h>
19 #include <linux/u64_stats_sync.h>
20 #include <net/route.h>
21 #include <net/ip6_fib.h>
22 #include <linux/if_vlan.h>
24 #define BR_HASH_BITS 8
25 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
27 #define BR_HOLD_TIME (1*HZ)
29 #define BR_PORT_BITS 10
30 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
31 #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
33 #define BR_VERSION "2.3"
35 /* Control of forwarding link local multicast */
36 #define BR_GROUPFWD_DEFAULT 0
37 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38 #define BR_GROUPFWD_RESTRICTED 0x0007u
39 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40 #define BR_GROUPFWD_8021AD 0xB801u
42 /* Path to usermode spanning tree program */
43 #define BR_STP_PROG "/sbin/bridge-stp"
45 typedef struct bridge_id bridge_id;
46 typedef struct mac_addr mac_addr;
47 typedef __u16 port_id;
51 unsigned char prio[2];
52 unsigned char addr[ETH_ALEN];
57 unsigned char addr[ETH_ALEN];
60 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
62 struct bridge_mcast_own_query {
63 struct timer_list timer;
68 struct bridge_mcast_other_query {
69 struct timer_list timer;
70 unsigned long delay_time;
73 /* selected querier */
74 struct bridge_mcast_querier {
76 struct net_bridge_port __rcu *port;
80 struct net_port_vlans {
84 struct net_bridge_port *port;
85 struct net_bridge *br;
88 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
89 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
93 struct net_bridge_fdb_entry
95 struct hlist_node hlist;
96 struct net_bridge_port *dst;
98 unsigned long updated;
102 unsigned char is_local:1,
105 added_by_external_learn:1;
109 struct net_bridge_port_group {
110 struct net_bridge_port *port;
111 struct net_bridge_port_group __rcu *next;
112 struct hlist_node mglist;
114 struct timer_list timer;
119 struct net_bridge_mdb_entry
121 struct hlist_node hlist[2];
122 struct net_bridge *br;
123 struct net_bridge_port_group __rcu *ports;
125 struct timer_list timer;
130 struct net_bridge_mdb_htable
132 struct hlist_head *mhash;
134 struct net_bridge_mdb_htable *old;
141 struct net_bridge_port
143 struct net_bridge *br;
144 struct net_device *dev;
145 struct list_head list;
151 unsigned char topology_change_ack;
152 unsigned char config_pending;
154 port_id designated_port;
155 bridge_id designated_root;
156 bridge_id designated_bridge;
159 unsigned long designated_age;
161 struct timer_list forward_delay_timer;
162 struct timer_list hold_timer;
163 struct timer_list message_age_timer;
169 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
170 struct bridge_mcast_own_query ip4_own_query;
171 #if IS_ENABLED(CONFIG_IPV6)
172 struct bridge_mcast_own_query ip6_own_query;
173 #endif /* IS_ENABLED(CONFIG_IPV6) */
174 unsigned char multicast_router;
175 struct timer_list multicast_router_timer;
176 struct hlist_head mglist;
177 struct hlist_node rlist;
181 char sysfs_name[IFNAMSIZ];
184 #ifdef CONFIG_NET_POLL_CONTROLLER
187 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
188 struct net_port_vlans __rcu *vlan_info;
192 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
193 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
195 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
197 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
199 return rcu_dereference(dev->rx_handler_data);
202 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
204 return br_port_exists(dev) ?
205 rtnl_dereference(dev->rx_handler_data) : NULL;
211 struct list_head port_list;
212 struct net_device *dev;
214 struct pcpu_sw_netstats __percpu *stats;
215 spinlock_t hash_lock;
216 struct hlist_head hash[BR_HASH_SIZE];
217 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
219 struct rtable fake_rtable;
220 struct rt6_info fake_rt6_info;
222 bool nf_call_iptables;
223 bool nf_call_ip6tables;
224 bool nf_call_arptables;
227 u16 group_fwd_mask_required;
230 bridge_id designated_root;
233 unsigned long max_age;
234 unsigned long hello_time;
235 unsigned long forward_delay;
236 unsigned long bridge_max_age;
237 unsigned long ageing_time;
238 unsigned long bridge_hello_time;
239 unsigned long bridge_forward_delay;
241 u8 group_addr[ETH_ALEN];
246 BR_NO_STP, /* no spanning tree */
247 BR_KERNEL_STP, /* old STP in kernel */
248 BR_USER_STP, /* new RSTP in userspace */
251 unsigned char topology_change;
252 unsigned char topology_change_detected;
254 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
255 unsigned char multicast_router;
257 u8 multicast_disabled:1;
258 u8 multicast_querier:1;
259 u8 multicast_query_use_ifaddr:1;
264 u32 multicast_last_member_count;
265 u32 multicast_startup_query_count;
267 unsigned long multicast_last_member_interval;
268 unsigned long multicast_membership_interval;
269 unsigned long multicast_querier_interval;
270 unsigned long multicast_query_interval;
271 unsigned long multicast_query_response_interval;
272 unsigned long multicast_startup_query_interval;
274 spinlock_t multicast_lock;
275 struct net_bridge_mdb_htable __rcu *mdb;
276 struct hlist_head router_list;
278 struct timer_list multicast_router_timer;
279 struct bridge_mcast_other_query ip4_other_query;
280 struct bridge_mcast_own_query ip4_own_query;
281 struct bridge_mcast_querier ip4_querier;
282 #if IS_ENABLED(CONFIG_IPV6)
283 struct bridge_mcast_other_query ip6_other_query;
284 struct bridge_mcast_own_query ip6_own_query;
285 struct bridge_mcast_querier ip6_querier;
286 #endif /* IS_ENABLED(CONFIG_IPV6) */
289 struct timer_list hello_timer;
290 struct timer_list tcn_timer;
291 struct timer_list topology_change_timer;
292 struct timer_list gc_timer;
293 struct kobject *ifobj;
295 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
299 struct net_port_vlans __rcu *vlan_info;
303 struct br_input_skb_cb {
304 struct net_device *brdev;
306 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
311 bool proxyarp_replied;
313 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
318 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
320 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
321 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
323 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
326 #define br_printk(level, br, format, args...) \
327 printk(level "%s: " format, (br)->dev->name, ##args)
329 #define br_err(__br, format, args...) \
330 br_printk(KERN_ERR, __br, format, ##args)
331 #define br_warn(__br, format, args...) \
332 br_printk(KERN_WARNING, __br, format, ##args)
333 #define br_notice(__br, format, args...) \
334 br_printk(KERN_NOTICE, __br, format, ##args)
335 #define br_info(__br, format, args...) \
336 br_printk(KERN_INFO, __br, format, ##args)
338 #define br_debug(br, format, args...) \
339 pr_debug("%s: " format, (br)->dev->name, ##args)
341 /* called under bridge lock */
342 static inline int br_is_root_bridge(const struct net_bridge *br)
344 return !memcmp(&br->bridge_id, &br->designated_root, 8);
348 void br_dev_setup(struct net_device *dev);
349 void br_dev_delete(struct net_device *dev, struct list_head *list);
350 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
351 #ifdef CONFIG_NET_POLL_CONTROLLER
352 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
355 struct netpoll *np = p->np;
358 netpoll_send_skb(np, skb);
361 int br_netpoll_enable(struct net_bridge_port *p);
362 void br_netpoll_disable(struct net_bridge_port *p);
364 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
369 static inline int br_netpoll_enable(struct net_bridge_port *p)
374 static inline void br_netpoll_disable(struct net_bridge_port *p)
380 int br_fdb_init(void);
381 void br_fdb_fini(void);
382 void br_fdb_flush(struct net_bridge *br);
383 void br_fdb_find_delete_local(struct net_bridge *br,
384 const struct net_bridge_port *p,
385 const unsigned char *addr, u16 vid);
386 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
387 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
388 void br_fdb_cleanup(unsigned long arg);
389 void br_fdb_delete_by_port(struct net_bridge *br,
390 const struct net_bridge_port *p, u16 vid, int do_all);
391 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
392 const unsigned char *addr, __u16 vid);
393 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
394 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
396 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
397 const unsigned char *addr, u16 vid);
398 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
399 const unsigned char *addr, u16 vid, bool added_by_user);
401 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
402 struct net_device *dev, const unsigned char *addr, u16 vid);
403 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
404 const unsigned char *addr, u16 vid, u16 nlh_flags);
405 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
406 struct net_device *dev, struct net_device *fdev, int idx);
407 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
408 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
409 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
410 const unsigned char *addr, u16 vid);
411 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
412 const unsigned char *addr, u16 vid);
415 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
416 int br_dev_queue_push_xmit(struct sock *sk, struct sk_buff *skb);
417 void br_forward(const struct net_bridge_port *to,
418 struct sk_buff *skb, struct sk_buff *skb0);
419 int br_forward_finish(struct sock *sk, struct sk_buff *skb);
420 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
421 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
422 struct sk_buff *skb2, bool unicast);
425 void br_port_carrier_check(struct net_bridge_port *p);
426 int br_add_bridge(struct net *net, const char *name);
427 int br_del_bridge(struct net *net, const char *name);
428 int br_add_if(struct net_bridge *br, struct net_device *dev);
429 int br_del_if(struct net_bridge *br, struct net_device *dev);
430 int br_min_mtu(const struct net_bridge *br);
431 netdev_features_t br_features_recompute(struct net_bridge *br,
432 netdev_features_t features);
433 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
434 void br_manage_promisc(struct net_bridge *br);
437 int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
438 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
440 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
442 return rcu_dereference(dev->rx_handler) == br_handle_frame;
445 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
447 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
451 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
452 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
456 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
457 extern unsigned int br_mdb_rehash_seq;
458 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
459 struct sk_buff *skb, u16 vid);
460 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
461 struct sk_buff *skb, u16 vid);
462 void br_multicast_add_port(struct net_bridge_port *port);
463 void br_multicast_del_port(struct net_bridge_port *port);
464 void br_multicast_enable_port(struct net_bridge_port *port);
465 void br_multicast_disable_port(struct net_bridge_port *port);
466 void br_multicast_init(struct net_bridge *br);
467 void br_multicast_open(struct net_bridge *br);
468 void br_multicast_stop(struct net_bridge *br);
469 void br_multicast_dev_del(struct net_bridge *br);
470 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
471 struct sk_buff *skb);
472 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
473 struct sk_buff *skb, struct sk_buff *skb2);
474 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
475 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
476 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
477 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
478 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
479 struct net_bridge_mdb_entry *
480 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
481 struct net_bridge_mdb_entry *
482 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
483 struct br_ip *group);
484 void br_multicast_free_pg(struct rcu_head *head);
485 struct net_bridge_port_group *
486 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
487 struct net_bridge_port_group __rcu *next,
488 unsigned char state);
489 void br_mdb_init(void);
490 void br_mdb_uninit(void);
491 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
492 struct br_ip *group, int type, u8 state);
493 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
496 #define mlock_dereference(X, br) \
497 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
499 static inline bool br_multicast_is_router(struct net_bridge *br)
501 return br->multicast_router == 2 ||
502 (br->multicast_router == 1 &&
503 timer_pending(&br->multicast_router_timer));
507 __br_multicast_querier_exists(struct net_bridge *br,
508 struct bridge_mcast_other_query *querier)
510 return time_is_before_jiffies(querier->delay_time) &&
511 (br->multicast_querier || timer_pending(&querier->timer));
514 static inline bool br_multicast_querier_exists(struct net_bridge *br,
517 switch (eth->h_proto) {
518 case (htons(ETH_P_IP)):
519 return __br_multicast_querier_exists(br, &br->ip4_other_query);
520 #if IS_ENABLED(CONFIG_IPV6)
521 case (htons(ETH_P_IPV6)):
522 return __br_multicast_querier_exists(br, &br->ip6_other_query);
529 static inline int br_multicast_rcv(struct net_bridge *br,
530 struct net_bridge_port *port,
537 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
538 struct sk_buff *skb, u16 vid)
543 static inline void br_multicast_add_port(struct net_bridge_port *port)
547 static inline void br_multicast_del_port(struct net_bridge_port *port)
551 static inline void br_multicast_enable_port(struct net_bridge_port *port)
555 static inline void br_multicast_disable_port(struct net_bridge_port *port)
559 static inline void br_multicast_init(struct net_bridge *br)
563 static inline void br_multicast_open(struct net_bridge *br)
567 static inline void br_multicast_stop(struct net_bridge *br)
571 static inline void br_multicast_dev_del(struct net_bridge *br)
575 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
580 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
582 struct sk_buff *skb2)
585 static inline bool br_multicast_is_router(struct net_bridge *br)
589 static inline bool br_multicast_querier_exists(struct net_bridge *br,
594 static inline void br_mdb_init(void)
597 static inline void br_mdb_uninit(void)
603 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
604 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
605 struct sk_buff *skb, u16 *vid);
606 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
607 const struct sk_buff *skb);
608 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
609 struct sk_buff *br_handle_vlan(struct net_bridge *br,
610 const struct net_port_vlans *v,
611 struct sk_buff *skb);
612 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
613 int br_vlan_delete(struct net_bridge *br, u16 vid);
614 void br_vlan_flush(struct net_bridge *br);
615 bool br_vlan_find(struct net_bridge *br, u16 vid);
616 void br_recalculate_fwd_mask(struct net_bridge *br);
617 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
618 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
619 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
620 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
621 int br_vlan_init(struct net_bridge *br);
622 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
623 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
624 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
625 void nbp_vlan_flush(struct net_bridge_port *port);
626 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
627 int nbp_vlan_init(struct net_bridge_port *port);
629 static inline struct net_port_vlans *br_get_vlan_info(
630 const struct net_bridge *br)
632 return rcu_dereference_rtnl(br->vlan_info);
635 static inline struct net_port_vlans *nbp_get_vlan_info(
636 const struct net_bridge_port *p)
638 return rcu_dereference_rtnl(p->vlan_info);
641 /* Since bridge now depends on 8021Q module, but the time bridge sees the
642 * skb, the vlan tag will always be present if the frame was tagged.
644 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
648 if (skb_vlan_tag_present(skb))
649 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
658 static inline u16 br_get_pvid(const struct net_port_vlans *v)
667 static inline int br_vlan_enabled(struct net_bridge *br)
669 return br->vlan_enabled;
672 static inline bool br_allowed_ingress(struct net_bridge *br,
673 struct net_port_vlans *v,
680 static inline bool br_allowed_egress(struct net_bridge *br,
681 const struct net_port_vlans *v,
682 const struct sk_buff *skb)
687 static inline bool br_should_learn(struct net_bridge_port *p,
688 struct sk_buff *skb, u16 *vid)
693 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
694 const struct net_port_vlans *v,
700 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
705 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
710 static inline void br_vlan_flush(struct net_bridge *br)
714 static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
719 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
723 static inline int br_vlan_init(struct net_bridge *br)
728 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
733 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
738 static inline void nbp_vlan_flush(struct net_bridge_port *port)
742 static inline struct net_port_vlans *br_get_vlan_info(
743 const struct net_bridge *br)
747 static inline struct net_port_vlans *nbp_get_vlan_info(
748 const struct net_bridge_port *p)
753 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
758 static inline int nbp_vlan_init(struct net_bridge_port *port)
763 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
767 static inline u16 br_get_pvid(const struct net_port_vlans *v)
772 static inline int br_vlan_enabled(struct net_bridge *br)
777 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
785 int (*br_dev_xmit_hook)(struct sk_buff *skb);
787 extern const struct nf_br_ops __rcu *nf_br_ops;
790 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
791 int br_nf_core_init(void);
792 void br_nf_core_fini(void);
793 void br_netfilter_rtable_init(struct net_bridge *);
795 static inline int br_nf_core_init(void) { return 0; }
796 static inline void br_nf_core_fini(void) {}
797 #define br_netfilter_rtable_init(x)
801 void br_log_state(const struct net_bridge_port *p);
802 void br_set_state(struct net_bridge_port *p, unsigned int state);
803 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
804 void br_init_port(struct net_bridge_port *p);
805 void br_become_designated_port(struct net_bridge_port *p);
807 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
808 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
809 int br_set_hello_time(struct net_bridge *br, unsigned long x);
810 int br_set_max_age(struct net_bridge *br, unsigned long x);
814 void br_stp_enable_bridge(struct net_bridge *br);
815 void br_stp_disable_bridge(struct net_bridge *br);
816 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
817 void br_stp_enable_port(struct net_bridge_port *p);
818 void br_stp_disable_port(struct net_bridge_port *p);
819 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
820 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
821 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
822 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
823 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
824 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
828 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
829 struct net_device *dev);
832 void br_stp_timer_init(struct net_bridge *br);
833 void br_stp_port_timer_init(struct net_bridge_port *p);
834 unsigned long br_timer_value(const struct timer_list *timer);
837 #if IS_ENABLED(CONFIG_ATM_LANE)
838 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
842 extern struct rtnl_link_ops br_link_ops;
843 int br_netlink_init(void);
844 void br_netlink_fini(void);
845 void br_ifinfo_notify(int event, struct net_bridge_port *port);
846 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
847 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
848 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
849 u32 filter_mask, int nlflags);
853 extern const struct sysfs_ops brport_sysfs_ops;
854 int br_sysfs_addif(struct net_bridge_port *p);
855 int br_sysfs_renameif(struct net_bridge_port *p);
858 int br_sysfs_addbr(struct net_device *dev);
859 void br_sysfs_delbr(struct net_device *dev);
863 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
864 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
865 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
866 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
867 #endif /* CONFIG_SYSFS */