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 <linux/if_vlan.h>
23 #define BR_HASH_BITS 8
24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
26 #define BR_HOLD_TIME (1*HZ)
28 #define BR_PORT_BITS 10
29 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
30 #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
32 #define BR_VERSION "2.3"
34 /* Control of forwarding link local multicast */
35 #define BR_GROUPFWD_DEFAULT 0
36 /* Don't allow forwarding control protocols like STP and LLDP */
37 #define BR_GROUPFWD_RESTRICTED 0x4007u
38 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
39 #define BR_GROUPFWD_8021AD 0xB801u
41 /* Path to usermode spanning tree program */
42 #define BR_STP_PROG "/sbin/bridge-stp"
44 typedef struct bridge_id bridge_id
;
45 typedef struct mac_addr mac_addr
;
46 typedef __u16 port_id
;
50 unsigned char prio
[2];
51 unsigned char addr
[ETH_ALEN
];
56 unsigned char addr
[ETH_ALEN
];
59 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
61 struct bridge_mcast_own_query
{
62 struct timer_list timer
;
67 struct bridge_mcast_other_query
{
68 struct timer_list timer
;
69 unsigned long delay_time
;
72 /* selected querier */
73 struct bridge_mcast_querier
{
75 struct net_bridge_port __rcu
*port
;
79 struct net_port_vlans
{
83 struct net_bridge_port
*port
;
84 struct net_bridge
*br
;
87 unsigned long vlan_bitmap
[BR_VLAN_BITMAP_LEN
];
88 unsigned long untagged_bitmap
[BR_VLAN_BITMAP_LEN
];
92 struct net_bridge_fdb_entry
94 struct hlist_node hlist
;
95 struct net_bridge_port
*dst
;
98 unsigned long updated
;
101 unsigned char is_local
;
102 unsigned char is_static
;
103 unsigned char added_by_user
;
107 struct net_bridge_port_group
{
108 struct net_bridge_port
*port
;
109 struct net_bridge_port_group __rcu
*next
;
110 struct hlist_node mglist
;
112 struct timer_list timer
;
117 struct net_bridge_mdb_entry
119 struct hlist_node hlist
[2];
120 struct net_bridge
*br
;
121 struct net_bridge_port_group __rcu
*ports
;
123 struct timer_list timer
;
128 struct net_bridge_mdb_htable
130 struct hlist_head
*mhash
;
132 struct net_bridge_mdb_htable
*old
;
139 struct net_bridge_port
141 struct net_bridge
*br
;
142 struct net_device
*dev
;
143 struct list_head list
;
149 unsigned char topology_change_ack
;
150 unsigned char config_pending
;
152 port_id designated_port
;
153 bridge_id designated_root
;
154 bridge_id designated_bridge
;
157 unsigned long designated_age
;
159 struct timer_list forward_delay_timer
;
160 struct timer_list hold_timer
;
161 struct timer_list message_age_timer
;
166 #define BR_HAIRPIN_MODE 0x00000001
167 #define BR_BPDU_GUARD 0x00000002
168 #define BR_ROOT_BLOCK 0x00000004
169 #define BR_MULTICAST_FAST_LEAVE 0x00000008
170 #define BR_ADMIN_COST 0x00000010
171 #define BR_LEARNING 0x00000020
172 #define BR_FLOOD 0x00000040
173 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
174 #define BR_PROMISC 0x00000080
176 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
177 struct bridge_mcast_own_query ip4_own_query
;
178 #if IS_ENABLED(CONFIG_IPV6)
179 struct bridge_mcast_own_query ip6_own_query
;
180 #endif /* IS_ENABLED(CONFIG_IPV6) */
181 unsigned char multicast_router
;
182 struct timer_list multicast_router_timer
;
183 struct hlist_head mglist
;
184 struct hlist_node rlist
;
188 char sysfs_name
[IFNAMSIZ
];
191 #ifdef CONFIG_NET_POLL_CONTROLLER
194 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
195 struct net_port_vlans __rcu
*vlan_info
;
199 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
200 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
202 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
204 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
206 return rcu_dereference(dev
->rx_handler_data
);
209 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
211 return br_port_exists(dev
) ?
212 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
218 struct list_head port_list
;
219 struct net_device
*dev
;
221 struct pcpu_sw_netstats __percpu
*stats
;
222 spinlock_t hash_lock
;
223 struct hlist_head hash
[BR_HASH_SIZE
];
224 #ifdef CONFIG_BRIDGE_NETFILTER
225 struct rtable fake_rtable
;
226 bool nf_call_iptables
;
227 bool nf_call_ip6tables
;
228 bool nf_call_arptables
;
231 u16 group_fwd_mask_required
;
234 bridge_id designated_root
;
237 unsigned long max_age
;
238 unsigned long hello_time
;
239 unsigned long forward_delay
;
240 unsigned long bridge_max_age
;
241 unsigned long ageing_time
;
242 unsigned long bridge_hello_time
;
243 unsigned long bridge_forward_delay
;
245 u8 group_addr
[ETH_ALEN
];
250 BR_NO_STP
, /* no spanning tree */
251 BR_KERNEL_STP
, /* old STP in kernel */
252 BR_USER_STP
, /* new RSTP in userspace */
255 unsigned char topology_change
;
256 unsigned char topology_change_detected
;
258 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
259 unsigned char multicast_router
;
261 u8 multicast_disabled
:1;
262 u8 multicast_querier
:1;
263 u8 multicast_query_use_ifaddr
:1;
268 u32 multicast_last_member_count
;
269 u32 multicast_startup_query_count
;
271 unsigned long multicast_last_member_interval
;
272 unsigned long multicast_membership_interval
;
273 unsigned long multicast_querier_interval
;
274 unsigned long multicast_query_interval
;
275 unsigned long multicast_query_response_interval
;
276 unsigned long multicast_startup_query_interval
;
278 spinlock_t multicast_lock
;
279 struct net_bridge_mdb_htable __rcu
*mdb
;
280 struct hlist_head router_list
;
282 struct timer_list multicast_router_timer
;
283 struct bridge_mcast_other_query ip4_other_query
;
284 struct bridge_mcast_own_query ip4_own_query
;
285 struct bridge_mcast_querier ip4_querier
;
286 #if IS_ENABLED(CONFIG_IPV6)
287 struct bridge_mcast_other_query ip6_other_query
;
288 struct bridge_mcast_own_query ip6_own_query
;
289 struct bridge_mcast_querier ip6_querier
;
290 #endif /* IS_ENABLED(CONFIG_IPV6) */
293 struct timer_list hello_timer
;
294 struct timer_list tcn_timer
;
295 struct timer_list topology_change_timer
;
296 struct timer_list gc_timer
;
297 struct kobject
*ifobj
;
299 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
302 struct net_port_vlans __rcu
*vlan_info
;
306 struct br_input_skb_cb
{
307 struct net_device
*brdev
;
308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
314 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
316 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
317 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
319 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
322 #define br_printk(level, br, format, args...) \
323 printk(level "%s: " format, (br)->dev->name, ##args)
325 #define br_err(__br, format, args...) \
326 br_printk(KERN_ERR, __br, format, ##args)
327 #define br_warn(__br, format, args...) \
328 br_printk(KERN_WARNING, __br, format, ##args)
329 #define br_notice(__br, format, args...) \
330 br_printk(KERN_NOTICE, __br, format, ##args)
331 #define br_info(__br, format, args...) \
332 br_printk(KERN_INFO, __br, format, ##args)
334 #define br_debug(br, format, args...) \
335 pr_debug("%s: " format, (br)->dev->name, ##args)
337 /* called under bridge lock */
338 static inline int br_is_root_bridge(const struct net_bridge
*br
)
340 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
344 void br_dev_setup(struct net_device
*dev
);
345 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
346 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
347 #ifdef CONFIG_NET_POLL_CONTROLLER
348 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
351 struct netpoll
*np
= p
->np
;
354 netpoll_send_skb(np
, skb
);
357 int br_netpoll_enable(struct net_bridge_port
*p
);
358 void br_netpoll_disable(struct net_bridge_port
*p
);
360 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
365 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
370 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
376 int br_fdb_init(void);
377 void br_fdb_fini(void);
378 void br_fdb_flush(struct net_bridge
*br
);
379 void br_fdb_find_delete_local(struct net_bridge
*br
,
380 const struct net_bridge_port
*p
,
381 const unsigned char *addr
, u16 vid
);
382 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
383 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
384 void br_fdb_cleanup(unsigned long arg
);
385 void br_fdb_delete_by_port(struct net_bridge
*br
,
386 const struct net_bridge_port
*p
, int do_all
);
387 struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
388 const unsigned char *addr
, __u16 vid
);
389 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
390 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
392 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
393 const unsigned char *addr
, u16 vid
);
394 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
395 const unsigned char *addr
, u16 vid
, bool added_by_user
);
397 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
398 struct net_device
*dev
, const unsigned char *addr
);
399 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
400 const unsigned char *addr
, u16 nlh_flags
);
401 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
402 struct net_device
*dev
, int idx
);
403 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
404 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
407 void br_deliver(const struct net_bridge_port
*to
, struct sk_buff
*skb
);
408 int br_dev_queue_push_xmit(struct sk_buff
*skb
);
409 void br_forward(const struct net_bridge_port
*to
,
410 struct sk_buff
*skb
, struct sk_buff
*skb0
);
411 int br_forward_finish(struct sk_buff
*skb
);
412 void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
, bool unicast
);
413 void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
414 struct sk_buff
*skb2
, bool unicast
);
417 void br_port_carrier_check(struct net_bridge_port
*p
);
418 int br_add_bridge(struct net
*net
, const char *name
);
419 int br_del_bridge(struct net
*net
, const char *name
);
420 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
);
421 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
422 int br_min_mtu(const struct net_bridge
*br
);
423 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
424 netdev_features_t features
);
425 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
426 void br_manage_promisc(struct net_bridge
*br
);
429 int br_handle_frame_finish(struct sk_buff
*skb
);
430 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
432 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
434 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
437 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
439 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
443 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
444 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
448 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
449 extern unsigned int br_mdb_rehash_seq
;
450 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
451 struct sk_buff
*skb
, u16 vid
);
452 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
453 struct sk_buff
*skb
, u16 vid
);
454 void br_multicast_add_port(struct net_bridge_port
*port
);
455 void br_multicast_del_port(struct net_bridge_port
*port
);
456 void br_multicast_enable_port(struct net_bridge_port
*port
);
457 void br_multicast_disable_port(struct net_bridge_port
*port
);
458 void br_multicast_init(struct net_bridge
*br
);
459 void br_multicast_open(struct net_bridge
*br
);
460 void br_multicast_stop(struct net_bridge
*br
);
461 void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
462 struct sk_buff
*skb
);
463 void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
464 struct sk_buff
*skb
, struct sk_buff
*skb2
);
465 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
466 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
467 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
468 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
469 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
470 struct net_bridge_mdb_entry
*
471 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
472 struct net_bridge_mdb_entry
*
473 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
474 struct br_ip
*group
);
475 void br_multicast_free_pg(struct rcu_head
*head
);
476 struct net_bridge_port_group
*
477 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
478 struct net_bridge_port_group __rcu
*next
,
479 unsigned char state
);
480 void br_mdb_init(void);
481 void br_mdb_uninit(void);
482 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
483 struct br_ip
*group
, int type
);
485 #define mlock_dereference(X, br) \
486 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
488 static inline bool br_multicast_is_router(struct net_bridge
*br
)
490 return br
->multicast_router
== 2 ||
491 (br
->multicast_router
== 1 &&
492 timer_pending(&br
->multicast_router_timer
));
496 __br_multicast_querier_exists(struct net_bridge
*br
,
497 struct bridge_mcast_other_query
*querier
)
499 return time_is_before_jiffies(querier
->delay_time
) &&
500 (br
->multicast_querier
|| timer_pending(&querier
->timer
));
503 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
506 switch (eth
->h_proto
) {
507 case (htons(ETH_P_IP
)):
508 return __br_multicast_querier_exists(br
, &br
->ip4_other_query
);
509 #if IS_ENABLED(CONFIG_IPV6)
510 case (htons(ETH_P_IPV6
)):
511 return __br_multicast_querier_exists(br
, &br
->ip6_other_query
);
518 static inline int br_multicast_rcv(struct net_bridge
*br
,
519 struct net_bridge_port
*port
,
526 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
527 struct sk_buff
*skb
, u16 vid
)
532 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
536 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
540 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
544 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
548 static inline void br_multicast_init(struct net_bridge
*br
)
552 static inline void br_multicast_open(struct net_bridge
*br
)
556 static inline void br_multicast_stop(struct net_bridge
*br
)
560 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
565 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
567 struct sk_buff
*skb2
)
570 static inline bool br_multicast_is_router(struct net_bridge
*br
)
574 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
579 static inline void br_mdb_init(void)
582 static inline void br_mdb_uninit(void)
588 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
589 bool br_allowed_ingress(struct net_bridge
*br
, struct net_port_vlans
*v
,
590 struct sk_buff
*skb
, u16
*vid
);
591 bool br_allowed_egress(struct net_bridge
*br
, const struct net_port_vlans
*v
,
592 const struct sk_buff
*skb
);
593 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
594 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
595 const struct net_port_vlans
*v
,
596 struct sk_buff
*skb
);
597 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
598 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
599 void br_vlan_flush(struct net_bridge
*br
);
600 bool br_vlan_find(struct net_bridge
*br
, u16 vid
);
601 void br_recalculate_fwd_mask(struct net_bridge
*br
);
602 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
603 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
604 void br_vlan_init(struct net_bridge
*br
);
605 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
606 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
607 void nbp_vlan_flush(struct net_bridge_port
*port
);
608 bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
);
610 static inline struct net_port_vlans
*br_get_vlan_info(
611 const struct net_bridge
*br
)
613 return rcu_dereference_rtnl(br
->vlan_info
);
616 static inline struct net_port_vlans
*nbp_get_vlan_info(
617 const struct net_bridge_port
*p
)
619 return rcu_dereference_rtnl(p
->vlan_info
);
622 /* Since bridge now depends on 8021Q module, but the time bridge sees the
623 * skb, the vlan tag will always be present if the frame was tagged.
625 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
629 if (vlan_tx_tag_present(skb
))
630 *vid
= vlan_tx_tag_get(skb
) & VLAN_VID_MASK
;
639 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
641 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
645 return v
->pvid
?: VLAN_N_VID
;
648 static inline int br_vlan_enabled(struct net_bridge
*br
)
650 return br
->vlan_enabled
;
653 static inline bool br_allowed_ingress(struct net_bridge
*br
,
654 struct net_port_vlans
*v
,
661 static inline bool br_allowed_egress(struct net_bridge
*br
,
662 const struct net_port_vlans
*v
,
663 const struct sk_buff
*skb
)
668 static inline bool br_should_learn(struct net_bridge_port
*p
,
669 struct sk_buff
*skb
, u16
*vid
)
674 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
675 const struct net_port_vlans
*v
,
681 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
686 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
691 static inline void br_vlan_flush(struct net_bridge
*br
)
695 static inline bool br_vlan_find(struct net_bridge
*br
, u16 vid
)
700 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
704 static inline void br_vlan_init(struct net_bridge
*br
)
708 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
713 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
718 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
722 static inline struct net_port_vlans
*br_get_vlan_info(
723 const struct net_bridge
*br
)
727 static inline struct net_port_vlans
*nbp_get_vlan_info(
728 const struct net_bridge_port
*p
)
733 static inline bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
)
738 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
742 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
744 return VLAN_N_VID
; /* Returns invalid vid */
747 static inline int br_vlan_enabled(struct net_bridge
*br
)
754 #ifdef CONFIG_BRIDGE_NETFILTER
755 int br_netfilter_init(void);
756 void br_netfilter_fini(void);
757 void br_netfilter_rtable_init(struct net_bridge
*);
759 #define br_netfilter_init() (0)
760 #define br_netfilter_fini() do { } while (0)
761 #define br_netfilter_rtable_init(x)
765 void br_log_state(const struct net_bridge_port
*p
);
766 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
767 void br_init_port(struct net_bridge_port
*p
);
768 void br_become_designated_port(struct net_bridge_port
*p
);
770 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
771 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
772 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
773 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
777 void br_stp_enable_bridge(struct net_bridge
*br
);
778 void br_stp_disable_bridge(struct net_bridge
*br
);
779 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
780 void br_stp_enable_port(struct net_bridge_port
*p
);
781 void br_stp_disable_port(struct net_bridge_port
*p
);
782 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
783 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
784 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
785 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
786 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
787 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
791 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
792 struct net_device
*dev
);
795 void br_stp_timer_init(struct net_bridge
*br
);
796 void br_stp_port_timer_init(struct net_bridge_port
*p
);
797 unsigned long br_timer_value(const struct timer_list
*timer
);
800 #if IS_ENABLED(CONFIG_ATM_LANE)
801 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
805 extern struct rtnl_link_ops br_link_ops
;
806 int br_netlink_init(void);
807 void br_netlink_fini(void);
808 void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
809 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
810 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
811 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
816 extern const struct sysfs_ops brport_sysfs_ops
;
817 int br_sysfs_addif(struct net_bridge_port
*p
);
818 int br_sysfs_renameif(struct net_bridge_port
*p
);
821 int br_sysfs_addbr(struct net_device
*dev
);
822 void br_sysfs_delbr(struct net_device
*dev
);
826 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
827 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
828 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
829 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
830 #endif /* CONFIG_SYSFS */