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>
23 #include <linux/rhashtable.h>
25 #define BR_HASH_BITS 8
26 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
28 #define BR_HOLD_TIME (1*HZ)
30 #define BR_PORT_BITS 10
31 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
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;
81 * struct net_bridge_vlan - per-vlan entry
83 * @vnode: rhashtable member
85 * @flags: bridge vlan flags
86 * @br: if MASTER flag set, this points to a bridge struct
87 * @port: if MASTER flag unset, this points to a port struct
88 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
89 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
91 * @vlist: sorted list of VLAN entries
92 * @rcu: used for entry destruction
94 * This structure is shared between the global per-VLAN entries contained in
95 * the bridge rhashtable and the local per-port per-VLAN entries contained in
96 * the port's rhashtable. The union entries should be interpreted depending on
97 * the entry flags that are set.
99 struct net_bridge_vlan {
100 struct rhash_head vnode;
104 struct net_bridge *br;
105 struct net_bridge_port *port;
109 struct net_bridge_vlan *brvlan;
111 struct list_head vlist;
117 * struct net_bridge_vlan_group
119 * @vlan_hash: VLAN entry rhashtable
120 * @vlan_list: sorted VLAN entry list
121 * @num_vlans: number of total VLAN entries
122 * @pvid: PVID VLAN id
124 * IMPORTANT: Be careful when checking if there're VLAN entries using list
125 * primitives because the bridge can have entries in its list which
126 * are just for global context but not for filtering, i.e. they have
127 * the master flag set but not the brentry flag. If you have to check
128 * if there're "real" entries in the bridge please test @num_vlans
130 struct net_bridge_vlan_group {
131 struct rhashtable vlan_hash;
132 struct list_head vlan_list;
137 struct net_bridge_fdb_entry
139 struct hlist_node hlist;
140 struct net_bridge_port *dst;
142 unsigned long updated;
146 unsigned char is_local:1,
149 added_by_external_learn:1;
153 #define MDB_PG_FLAGS_PERMANENT BIT(0)
154 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
156 struct net_bridge_port_group {
157 struct net_bridge_port *port;
158 struct net_bridge_port_group __rcu *next;
159 struct hlist_node mglist;
161 struct timer_list timer;
166 struct net_bridge_mdb_entry
168 struct hlist_node hlist[2];
169 struct net_bridge *br;
170 struct net_bridge_port_group __rcu *ports;
172 struct timer_list timer;
177 struct net_bridge_mdb_htable
179 struct hlist_head *mhash;
181 struct net_bridge_mdb_htable *old;
188 struct net_bridge_port
190 struct net_bridge *br;
191 struct net_device *dev;
192 struct list_head list;
198 unsigned char topology_change_ack;
199 unsigned char config_pending;
201 port_id designated_port;
202 bridge_id designated_root;
203 bridge_id designated_bridge;
206 unsigned long designated_age;
208 struct timer_list forward_delay_timer;
209 struct timer_list hold_timer;
210 struct timer_list message_age_timer;
216 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
217 struct bridge_mcast_own_query ip4_own_query;
218 #if IS_ENABLED(CONFIG_IPV6)
219 struct bridge_mcast_own_query ip6_own_query;
220 #endif /* IS_ENABLED(CONFIG_IPV6) */
221 unsigned char multicast_router;
222 struct timer_list multicast_router_timer;
223 struct hlist_head mglist;
224 struct hlist_node rlist;
228 char sysfs_name[IFNAMSIZ];
231 #ifdef CONFIG_NET_POLL_CONTROLLER
234 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
235 struct net_bridge_vlan_group __rcu *vlgrp;
239 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
240 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
242 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
244 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
246 return rcu_dereference(dev->rx_handler_data);
249 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
251 return br_port_exists(dev) ?
252 rtnl_dereference(dev->rx_handler_data) : NULL;
258 struct list_head port_list;
259 struct net_device *dev;
261 struct pcpu_sw_netstats __percpu *stats;
262 spinlock_t hash_lock;
263 struct hlist_head hash[BR_HASH_SIZE];
264 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
266 struct rtable fake_rtable;
267 struct rt6_info fake_rt6_info;
269 bool nf_call_iptables;
270 bool nf_call_ip6tables;
271 bool nf_call_arptables;
274 u16 group_fwd_mask_required;
277 bridge_id designated_root;
280 unsigned long max_age;
281 unsigned long hello_time;
282 unsigned long forward_delay;
283 unsigned long bridge_max_age;
284 unsigned long ageing_time;
285 unsigned long bridge_hello_time;
286 unsigned long bridge_forward_delay;
288 u8 group_addr[ETH_ALEN];
293 BR_NO_STP, /* no spanning tree */
294 BR_KERNEL_STP, /* old STP in kernel */
295 BR_USER_STP, /* new RSTP in userspace */
298 unsigned char topology_change;
299 unsigned char topology_change_detected;
301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302 unsigned char multicast_router;
304 u8 multicast_disabled:1;
305 u8 multicast_querier:1;
306 u8 multicast_query_use_ifaddr:1;
311 u32 multicast_last_member_count;
312 u32 multicast_startup_query_count;
314 unsigned long multicast_last_member_interval;
315 unsigned long multicast_membership_interval;
316 unsigned long multicast_querier_interval;
317 unsigned long multicast_query_interval;
318 unsigned long multicast_query_response_interval;
319 unsigned long multicast_startup_query_interval;
321 spinlock_t multicast_lock;
322 struct net_bridge_mdb_htable __rcu *mdb;
323 struct hlist_head router_list;
325 struct timer_list multicast_router_timer;
326 struct bridge_mcast_other_query ip4_other_query;
327 struct bridge_mcast_own_query ip4_own_query;
328 struct bridge_mcast_querier ip4_querier;
329 #if IS_ENABLED(CONFIG_IPV6)
330 struct bridge_mcast_other_query ip6_other_query;
331 struct bridge_mcast_own_query ip6_own_query;
332 struct bridge_mcast_querier ip6_querier;
333 #endif /* IS_ENABLED(CONFIG_IPV6) */
336 struct timer_list hello_timer;
337 struct timer_list tcn_timer;
338 struct timer_list topology_change_timer;
339 struct timer_list gc_timer;
340 struct kobject *ifobj;
342 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
343 struct net_bridge_vlan_group __rcu *vlgrp;
350 struct br_input_skb_cb {
351 struct net_device *brdev;
353 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
358 bool proxyarp_replied;
360 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
365 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
367 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
368 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
370 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
373 #define br_printk(level, br, format, args...) \
374 printk(level "%s: " format, (br)->dev->name, ##args)
376 #define br_err(__br, format, args...) \
377 br_printk(KERN_ERR, __br, format, ##args)
378 #define br_warn(__br, format, args...) \
379 br_printk(KERN_WARNING, __br, format, ##args)
380 #define br_notice(__br, format, args...) \
381 br_printk(KERN_NOTICE, __br, format, ##args)
382 #define br_info(__br, format, args...) \
383 br_printk(KERN_INFO, __br, format, ##args)
385 #define br_debug(br, format, args...) \
386 pr_debug("%s: " format, (br)->dev->name, ##args)
388 /* called under bridge lock */
389 static inline int br_is_root_bridge(const struct net_bridge *br)
391 return !memcmp(&br->bridge_id, &br->designated_root, 8);
394 /* check if a VLAN entry is global */
395 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
397 return v->flags & BRIDGE_VLAN_INFO_MASTER;
400 /* check if a VLAN entry is used by the bridge */
401 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
403 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
406 /* check if we should use the vlan entry, returns false if it's only context */
407 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
409 if (br_vlan_is_master(v)) {
410 if (br_vlan_is_brentry(v))
420 void br_dev_setup(struct net_device *dev);
421 void br_dev_delete(struct net_device *dev, struct list_head *list);
422 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
423 #ifdef CONFIG_NET_POLL_CONTROLLER
424 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
427 struct netpoll *np = p->np;
430 netpoll_send_skb(np, skb);
433 int br_netpoll_enable(struct net_bridge_port *p);
434 void br_netpoll_disable(struct net_bridge_port *p);
436 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
441 static inline int br_netpoll_enable(struct net_bridge_port *p)
446 static inline void br_netpoll_disable(struct net_bridge_port *p)
452 int br_fdb_init(void);
453 void br_fdb_fini(void);
454 void br_fdb_flush(struct net_bridge *br);
455 void br_fdb_find_delete_local(struct net_bridge *br,
456 const struct net_bridge_port *p,
457 const unsigned char *addr, u16 vid);
458 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
459 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
460 void br_fdb_cleanup(unsigned long arg);
461 void br_fdb_delete_by_port(struct net_bridge *br,
462 const struct net_bridge_port *p, u16 vid, int do_all);
463 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
464 const unsigned char *addr, __u16 vid);
465 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
466 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
468 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
469 const unsigned char *addr, u16 vid);
470 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
471 const unsigned char *addr, u16 vid, bool added_by_user);
473 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
474 struct net_device *dev, const unsigned char *addr, u16 vid);
475 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
476 const unsigned char *addr, u16 vid, u16 nlh_flags);
477 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
478 struct net_device *dev, struct net_device *fdev, int idx);
479 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
480 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
481 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
482 const unsigned char *addr, u16 vid);
483 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
484 const unsigned char *addr, u16 vid);
487 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
488 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
489 void br_forward(const struct net_bridge_port *to,
490 struct sk_buff *skb, struct sk_buff *skb0);
491 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
492 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
493 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
494 struct sk_buff *skb2, bool unicast);
497 void br_port_carrier_check(struct net_bridge_port *p);
498 int br_add_bridge(struct net *net, const char *name);
499 int br_del_bridge(struct net *net, const char *name);
500 int br_add_if(struct net_bridge *br, struct net_device *dev);
501 int br_del_if(struct net_bridge *br, struct net_device *dev);
502 int br_min_mtu(const struct net_bridge *br);
503 netdev_features_t br_features_recompute(struct net_bridge *br,
504 netdev_features_t features);
505 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
506 void br_manage_promisc(struct net_bridge *br);
509 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
510 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
512 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
514 return rcu_dereference(dev->rx_handler) == br_handle_frame;
517 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
519 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
523 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
528 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
529 extern unsigned int br_mdb_rehash_seq;
530 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
531 struct sk_buff *skb, u16 vid);
532 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
533 struct sk_buff *skb, u16 vid);
534 void br_multicast_add_port(struct net_bridge_port *port);
535 void br_multicast_del_port(struct net_bridge_port *port);
536 void br_multicast_enable_port(struct net_bridge_port *port);
537 void br_multicast_disable_port(struct net_bridge_port *port);
538 void br_multicast_init(struct net_bridge *br);
539 void br_multicast_open(struct net_bridge *br);
540 void br_multicast_stop(struct net_bridge *br);
541 void br_multicast_dev_del(struct net_bridge *br);
542 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
543 struct sk_buff *skb);
544 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
545 struct sk_buff *skb, struct sk_buff *skb2);
546 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
547 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
548 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
549 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
550 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
551 struct net_bridge_mdb_entry *
552 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
553 struct net_bridge_mdb_entry *
554 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
555 struct br_ip *group);
556 void br_multicast_free_pg(struct rcu_head *head);
557 struct net_bridge_port_group *
558 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
559 struct net_bridge_port_group __rcu *next,
560 unsigned char flags);
561 void br_mdb_init(void);
562 void br_mdb_uninit(void);
563 void br_mdb_notify(struct net_device *dev, struct net_bridge_port_group *pg,
565 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
568 #define mlock_dereference(X, br) \
569 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
571 static inline bool br_multicast_is_router(struct net_bridge *br)
573 return br->multicast_router == 2 ||
574 (br->multicast_router == 1 &&
575 timer_pending(&br->multicast_router_timer));
579 __br_multicast_querier_exists(struct net_bridge *br,
580 struct bridge_mcast_other_query *querier)
582 return time_is_before_jiffies(querier->delay_time) &&
583 (br->multicast_querier || timer_pending(&querier->timer));
586 static inline bool br_multicast_querier_exists(struct net_bridge *br,
589 switch (eth->h_proto) {
590 case (htons(ETH_P_IP)):
591 return __br_multicast_querier_exists(br, &br->ip4_other_query);
592 #if IS_ENABLED(CONFIG_IPV6)
593 case (htons(ETH_P_IPV6)):
594 return __br_multicast_querier_exists(br, &br->ip6_other_query);
601 static inline int br_multicast_rcv(struct net_bridge *br,
602 struct net_bridge_port *port,
609 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
610 struct sk_buff *skb, u16 vid)
615 static inline void br_multicast_add_port(struct net_bridge_port *port)
619 static inline void br_multicast_del_port(struct net_bridge_port *port)
623 static inline void br_multicast_enable_port(struct net_bridge_port *port)
627 static inline void br_multicast_disable_port(struct net_bridge_port *port)
631 static inline void br_multicast_init(struct net_bridge *br)
635 static inline void br_multicast_open(struct net_bridge *br)
639 static inline void br_multicast_stop(struct net_bridge *br)
643 static inline void br_multicast_dev_del(struct net_bridge *br)
647 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
652 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
654 struct sk_buff *skb2)
657 static inline bool br_multicast_is_router(struct net_bridge *br)
661 static inline bool br_multicast_querier_exists(struct net_bridge *br,
666 static inline void br_mdb_init(void)
669 static inline void br_mdb_uninit(void)
675 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
676 bool br_allowed_ingress(const struct net_bridge *br,
677 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
679 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
680 const struct sk_buff *skb);
681 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
682 struct sk_buff *br_handle_vlan(struct net_bridge *br,
683 struct net_bridge_vlan_group *vg,
684 struct sk_buff *skb);
685 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
686 int br_vlan_delete(struct net_bridge *br, u16 vid);
687 void br_vlan_flush(struct net_bridge *br);
688 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
689 void br_recalculate_fwd_mask(struct net_bridge *br);
690 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
691 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
692 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
693 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
694 int br_vlan_init(struct net_bridge *br);
695 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
696 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
697 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
698 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
699 void nbp_vlan_flush(struct net_bridge_port *port);
700 int nbp_vlan_init(struct net_bridge_port *port);
701 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
703 static inline struct net_bridge_vlan_group *br_vlan_group(
704 const struct net_bridge *br)
706 return rtnl_dereference(br->vlgrp);
709 static inline struct net_bridge_vlan_group *nbp_vlan_group(
710 const struct net_bridge_port *p)
712 return rtnl_dereference(p->vlgrp);
715 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
716 const struct net_bridge *br)
718 return rcu_dereference(br->vlgrp);
721 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
722 const struct net_bridge_port *p)
724 return rcu_dereference(p->vlgrp);
727 /* Since bridge now depends on 8021Q module, but the time bridge sees the
728 * skb, the vlan tag will always be present if the frame was tagged.
730 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
734 if (skb_vlan_tag_present(skb)) {
735 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
744 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
753 static inline int br_vlan_enabled(struct net_bridge *br)
755 return br->vlan_enabled;
758 static inline bool br_allowed_ingress(const struct net_bridge *br,
759 struct net_bridge_vlan_group *vg,
766 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
767 const struct sk_buff *skb)
772 static inline bool br_should_learn(struct net_bridge_port *p,
773 struct sk_buff *skb, u16 *vid)
778 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
779 struct net_bridge_vlan_group *vg,
785 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
790 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
795 static inline void br_vlan_flush(struct net_bridge *br)
799 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
803 static inline int br_vlan_init(struct net_bridge *br)
808 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
813 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
818 static inline void nbp_vlan_flush(struct net_bridge_port *port)
822 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
828 static inline int nbp_vlan_init(struct net_bridge_port *port)
833 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
838 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
843 static inline int br_vlan_enabled(struct net_bridge *br)
848 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
854 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
860 static inline struct net_bridge_vlan_group *br_vlan_group(
861 const struct net_bridge *br)
866 static inline struct net_bridge_vlan_group *nbp_vlan_group(
867 const struct net_bridge_port *p)
872 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
873 const struct net_bridge *br)
878 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
879 const struct net_bridge_port *p)
887 int (*br_dev_xmit_hook)(struct sk_buff *skb);
889 extern const struct nf_br_ops __rcu *nf_br_ops;
892 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
893 int br_nf_core_init(void);
894 void br_nf_core_fini(void);
895 void br_netfilter_rtable_init(struct net_bridge *);
897 static inline int br_nf_core_init(void) { return 0; }
898 static inline void br_nf_core_fini(void) {}
899 #define br_netfilter_rtable_init(x)
903 void br_set_state(struct net_bridge_port *p, unsigned int state);
904 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
905 void br_init_port(struct net_bridge_port *p);
906 void br_become_designated_port(struct net_bridge_port *p);
908 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
909 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
910 int br_set_hello_time(struct net_bridge *br, unsigned long x);
911 int br_set_max_age(struct net_bridge *br, unsigned long x);
912 int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
916 void br_stp_enable_bridge(struct net_bridge *br);
917 void br_stp_disable_bridge(struct net_bridge *br);
918 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
919 void br_stp_enable_port(struct net_bridge_port *p);
920 void br_stp_disable_port(struct net_bridge_port *p);
921 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
922 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
923 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
924 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
925 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
926 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
930 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
931 struct net_device *dev);
934 void br_stp_timer_init(struct net_bridge *br);
935 void br_stp_port_timer_init(struct net_bridge_port *p);
936 unsigned long br_timer_value(const struct timer_list *timer);
939 #if IS_ENABLED(CONFIG_ATM_LANE)
940 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
944 extern struct rtnl_link_ops br_link_ops;
945 int br_netlink_init(void);
946 void br_netlink_fini(void);
947 void br_ifinfo_notify(int event, struct net_bridge_port *port);
948 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
949 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
950 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
951 u32 filter_mask, int nlflags);
955 extern const struct sysfs_ops brport_sysfs_ops;
956 int br_sysfs_addif(struct net_bridge_port *p);
957 int br_sysfs_renameif(struct net_bridge_port *p);
960 int br_sysfs_addbr(struct net_device *dev);
961 void br_sysfs_delbr(struct net_device *dev);
965 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
966 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
967 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
968 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
969 #endif /* CONFIG_SYSFS */