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
39 /* Path to usermode spanning tree program */
40 #define BR_STP_PROG "/sbin/bridge-stp"
42 typedef struct bridge_id bridge_id
;
43 typedef struct mac_addr mac_addr
;
44 typedef __u16 port_id
;
48 unsigned char prio
[2];
49 unsigned char addr
[6];
54 unsigned char addr
[6];
61 #if IS_ENABLED(CONFIG_IPV6)
69 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
71 struct bridge_mcast_query
{
72 struct timer_list timer
;
77 struct bridge_mcast_querier
{
78 struct timer_list timer
;
79 unsigned long delay_time
;
83 struct net_port_vlans
{
87 struct net_bridge_port
*port
;
88 struct net_bridge
*br
;
91 unsigned long vlan_bitmap
[BR_VLAN_BITMAP_LEN
];
92 unsigned long untagged_bitmap
[BR_VLAN_BITMAP_LEN
];
96 struct net_bridge_fdb_entry
98 struct hlist_node hlist
;
99 struct net_bridge_port
*dst
;
102 unsigned long updated
;
105 unsigned char is_local
;
106 unsigned char is_static
;
110 struct net_bridge_port_group
{
111 struct net_bridge_port
*port
;
112 struct net_bridge_port_group __rcu
*next
;
113 struct hlist_node mglist
;
115 struct timer_list timer
;
120 struct net_bridge_mdb_entry
122 struct hlist_node hlist
[2];
123 struct net_bridge
*br
;
124 struct net_bridge_port_group __rcu
*ports
;
126 struct timer_list timer
;
132 struct net_bridge_mdb_htable
134 struct hlist_head
*mhash
;
136 struct net_bridge_mdb_htable
*old
;
143 struct net_bridge_port
145 struct net_bridge
*br
;
146 struct net_device
*dev
;
147 struct list_head list
;
153 unsigned char topology_change_ack
;
154 unsigned char config_pending
;
156 port_id designated_port
;
157 bridge_id designated_root
;
158 bridge_id designated_bridge
;
161 unsigned long designated_age
;
163 struct timer_list forward_delay_timer
;
164 struct timer_list hold_timer
;
165 struct timer_list message_age_timer
;
170 #define BR_HAIRPIN_MODE 0x00000001
171 #define BR_BPDU_GUARD 0x00000002
172 #define BR_ROOT_BLOCK 0x00000004
173 #define BR_MULTICAST_FAST_LEAVE 0x00000008
174 #define BR_ADMIN_COST 0x00000010
175 #define BR_LEARNING 0x00000020
176 #define BR_FLOOD 0x00000040
178 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
179 struct bridge_mcast_query ip4_query
;
180 #if IS_ENABLED(CONFIG_IPV6)
181 struct bridge_mcast_query ip6_query
;
182 #endif /* IS_ENABLED(CONFIG_IPV6) */
183 unsigned char multicast_router
;
184 struct timer_list multicast_router_timer
;
185 struct hlist_head mglist
;
186 struct hlist_node rlist
;
190 char sysfs_name
[IFNAMSIZ
];
193 #ifdef CONFIG_NET_POLL_CONTROLLER
196 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
197 struct net_port_vlans __rcu
*vlan_info
;
201 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
203 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
205 return rcu_dereference(dev
->rx_handler_data
);
208 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
210 return br_port_exists(dev
) ?
211 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
214 struct br_cpu_netstats
{
219 struct u64_stats_sync syncp
;
225 struct list_head port_list
;
226 struct net_device
*dev
;
228 struct br_cpu_netstats __percpu
*stats
;
229 spinlock_t hash_lock
;
230 struct hlist_head hash
[BR_HASH_SIZE
];
231 #ifdef CONFIG_BRIDGE_NETFILTER
232 struct rtable fake_rtable
;
233 bool nf_call_iptables
;
234 bool nf_call_ip6tables
;
235 bool nf_call_arptables
;
240 bridge_id designated_root
;
243 unsigned long max_age
;
244 unsigned long hello_time
;
245 unsigned long forward_delay
;
246 unsigned long bridge_max_age
;
247 unsigned long ageing_time
;
248 unsigned long bridge_hello_time
;
249 unsigned long bridge_forward_delay
;
251 u8 group_addr
[ETH_ALEN
];
255 BR_NO_STP
, /* no spanning tree */
256 BR_KERNEL_STP
, /* old STP in kernel */
257 BR_USER_STP
, /* new RSTP in userspace */
260 unsigned char topology_change
;
261 unsigned char topology_change_detected
;
263 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
264 unsigned char multicast_router
;
266 u8 multicast_disabled
:1;
267 u8 multicast_querier
:1;
268 u8 multicast_query_use_ifaddr
:1;
273 u32 multicast_last_member_count
;
274 u32 multicast_startup_query_count
;
276 unsigned long multicast_last_member_interval
;
277 unsigned long multicast_membership_interval
;
278 unsigned long multicast_querier_interval
;
279 unsigned long multicast_query_interval
;
280 unsigned long multicast_query_response_interval
;
281 unsigned long multicast_startup_query_interval
;
283 spinlock_t multicast_lock
;
284 struct net_bridge_mdb_htable __rcu
*mdb
;
285 struct hlist_head router_list
;
287 struct timer_list multicast_router_timer
;
288 struct bridge_mcast_querier ip4_querier
;
289 struct bridge_mcast_query ip4_query
;
290 #if IS_ENABLED(CONFIG_IPV6)
291 struct bridge_mcast_querier ip6_querier
;
292 struct bridge_mcast_query ip6_query
;
293 #endif /* IS_ENABLED(CONFIG_IPV6) */
296 struct timer_list hello_timer
;
297 struct timer_list tcn_timer
;
298 struct timer_list topology_change_timer
;
299 struct timer_list gc_timer
;
300 struct kobject
*ifobj
;
301 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
303 struct net_port_vlans __rcu
*vlan_info
;
307 struct br_input_skb_cb
{
308 struct net_device
*brdev
;
309 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
315 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
317 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
318 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
320 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
323 #define br_printk(level, br, format, args...) \
324 printk(level "%s: " format, (br)->dev->name, ##args)
326 #define br_err(__br, format, args...) \
327 br_printk(KERN_ERR, __br, format, ##args)
328 #define br_warn(__br, format, args...) \
329 br_printk(KERN_WARNING, __br, format, ##args)
330 #define br_notice(__br, format, args...) \
331 br_printk(KERN_NOTICE, __br, format, ##args)
332 #define br_info(__br, format, args...) \
333 br_printk(KERN_INFO, __br, format, ##args)
335 #define br_debug(br, format, args...) \
336 pr_debug("%s: " format, (br)->dev->name, ##args)
338 extern struct notifier_block br_device_notifier
;
340 /* called under bridge lock */
341 static inline int br_is_root_bridge(const struct net_bridge
*br
)
343 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
347 extern void br_dev_setup(struct net_device
*dev
);
348 extern void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
349 extern netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
,
350 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 extern int br_netpoll_enable(struct net_bridge_port
*p
, gfp_t gfp
);
362 extern 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
, gfp_t gfp
)
374 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
380 extern int br_fdb_init(void);
381 extern void br_fdb_fini(void);
382 extern void br_fdb_flush(struct net_bridge
*br
);
383 extern void br_fdb_changeaddr(struct net_bridge_port
*p
,
384 const unsigned char *newaddr
);
385 extern void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
386 extern void br_fdb_cleanup(unsigned long arg
);
387 extern void br_fdb_delete_by_port(struct net_bridge
*br
,
388 const struct net_bridge_port
*p
, int do_all
);
389 extern struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
390 const unsigned char *addr
,
392 extern int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
393 extern int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
,
394 unsigned long count
, unsigned long off
);
395 extern int br_fdb_insert(struct net_bridge
*br
,
396 struct net_bridge_port
*source
,
397 const unsigned char *addr
,
399 extern void br_fdb_update(struct net_bridge
*br
,
400 struct net_bridge_port
*source
,
401 const unsigned char *addr
,
403 extern int fdb_delete_by_addr(struct net_bridge
*br
, const u8
*addr
, u16 vid
);
405 extern int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
406 struct net_device
*dev
,
407 const unsigned char *addr
);
408 extern int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[],
409 struct net_device
*dev
,
410 const unsigned char *addr
,
412 extern int br_fdb_dump(struct sk_buff
*skb
,
413 struct netlink_callback
*cb
,
414 struct net_device
*dev
,
418 extern void br_deliver(const struct net_bridge_port
*to
,
419 struct sk_buff
*skb
);
420 extern int br_dev_queue_push_xmit(struct sk_buff
*skb
);
421 extern void br_forward(const struct net_bridge_port
*to
,
422 struct sk_buff
*skb
, struct sk_buff
*skb0
);
423 extern int br_forward_finish(struct sk_buff
*skb
);
424 extern void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
,
426 extern void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
427 struct sk_buff
*skb2
, bool unicast
);
430 extern void br_port_carrier_check(struct net_bridge_port
*p
);
431 extern int br_add_bridge(struct net
*net
, const char *name
);
432 extern int br_del_bridge(struct net
*net
, const char *name
);
433 extern void br_net_exit(struct net
*net
);
434 extern int br_add_if(struct net_bridge
*br
,
435 struct net_device
*dev
);
436 extern int br_del_if(struct net_bridge
*br
,
437 struct net_device
*dev
);
438 extern int br_min_mtu(const struct net_bridge
*br
);
439 extern netdev_features_t
br_features_recompute(struct net_bridge
*br
,
440 netdev_features_t features
);
443 extern int br_handle_frame_finish(struct sk_buff
*skb
);
444 extern rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
447 extern int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
448 extern int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
, void __user
*arg
);
451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
452 extern unsigned int br_mdb_rehash_seq
;
453 extern int br_multicast_rcv(struct net_bridge
*br
,
454 struct net_bridge_port
*port
,
455 struct sk_buff
*skb
);
456 extern struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
457 struct sk_buff
*skb
, u16 vid
);
458 extern void br_multicast_add_port(struct net_bridge_port
*port
);
459 extern void br_multicast_del_port(struct net_bridge_port
*port
);
460 extern void br_multicast_enable_port(struct net_bridge_port
*port
);
461 extern void br_multicast_disable_port(struct net_bridge_port
*port
);
462 extern void br_multicast_init(struct net_bridge
*br
);
463 extern void br_multicast_open(struct net_bridge
*br
);
464 extern void br_multicast_stop(struct net_bridge
*br
);
465 extern void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
466 struct sk_buff
*skb
);
467 extern void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
468 struct sk_buff
*skb
, struct sk_buff
*skb2
);
469 extern int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
470 extern int br_multicast_set_port_router(struct net_bridge_port
*p
,
472 extern int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
473 extern int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
474 extern int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
475 extern struct net_bridge_mdb_entry
*br_mdb_ip_get(
476 struct net_bridge_mdb_htable
*mdb
,
478 extern struct net_bridge_mdb_entry
*br_multicast_new_group(struct net_bridge
*br
,
479 struct net_bridge_port
*port
, struct br_ip
*group
);
480 extern void br_multicast_free_pg(struct rcu_head
*head
);
481 extern struct net_bridge_port_group
*br_multicast_new_port_group(
482 struct net_bridge_port
*port
,
484 struct net_bridge_port_group __rcu
*next
,
485 unsigned char state
);
486 extern void br_mdb_init(void);
487 extern void br_mdb_uninit(void);
488 extern void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
489 struct br_ip
*group
, int type
);
491 #define mlock_dereference(X, br) \
492 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
494 static inline bool br_multicast_is_router(struct net_bridge
*br
)
496 return br
->multicast_router
== 2 ||
497 (br
->multicast_router
== 1 &&
498 timer_pending(&br
->multicast_router_timer
));
502 __br_multicast_querier_exists(struct net_bridge
*br
,
503 struct bridge_mcast_querier
*querier
)
505 return time_is_before_jiffies(querier
->delay_time
) &&
506 (br
->multicast_querier
|| timer_pending(&querier
->timer
));
509 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
512 switch (eth
->h_proto
) {
513 case (htons(ETH_P_IP
)):
514 return __br_multicast_querier_exists(br
, &br
->ip4_querier
);
515 #if IS_ENABLED(CONFIG_IPV6)
516 case (htons(ETH_P_IPV6
)):
517 return __br_multicast_querier_exists(br
, &br
->ip6_querier
);
524 static inline int br_multicast_rcv(struct net_bridge
*br
,
525 struct net_bridge_port
*port
,
531 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
532 struct sk_buff
*skb
, u16 vid
)
537 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
541 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
545 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
549 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
553 static inline void br_multicast_init(struct net_bridge
*br
)
557 static inline void br_multicast_open(struct net_bridge
*br
)
561 static inline void br_multicast_stop(struct net_bridge
*br
)
565 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
570 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
572 struct sk_buff
*skb2
)
575 static inline bool br_multicast_is_router(struct net_bridge
*br
)
579 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
584 static inline void br_mdb_init(void)
587 static inline void br_mdb_uninit(void)
593 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
594 extern bool br_allowed_ingress(struct net_bridge
*br
, struct net_port_vlans
*v
,
595 struct sk_buff
*skb
, u16
*vid
);
596 extern bool br_allowed_egress(struct net_bridge
*br
,
597 const struct net_port_vlans
*v
,
598 const struct sk_buff
*skb
);
599 extern struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
600 const struct net_port_vlans
*v
,
601 struct sk_buff
*skb
);
602 extern int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
603 extern int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
604 extern void br_vlan_flush(struct net_bridge
*br
);
605 extern int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
606 extern int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
607 extern int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
608 extern void nbp_vlan_flush(struct net_bridge_port
*port
);
609 extern bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
);
611 static inline struct net_port_vlans
*br_get_vlan_info(
612 const struct net_bridge
*br
)
614 return rcu_dereference_rtnl(br
->vlan_info
);
617 static inline struct net_port_vlans
*nbp_get_vlan_info(
618 const struct net_bridge_port
*p
)
620 return rcu_dereference_rtnl(p
->vlan_info
);
623 /* Since bridge now depends on 8021Q module, but the time bridge sees the
624 * skb, the vlan tag will always be present if the frame was tagged.
626 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
630 if (vlan_tx_tag_present(skb
))
631 *vid
= vlan_tx_tag_get(skb
) & VLAN_VID_MASK
;
640 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
642 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
646 return (v
->pvid
& VLAN_TAG_PRESENT
) ?
647 (v
->pvid
& ~VLAN_TAG_PRESENT
) :
652 static inline bool br_allowed_ingress(struct net_bridge
*br
,
653 struct net_port_vlans
*v
,
660 static inline bool br_allowed_egress(struct net_bridge
*br
,
661 const struct net_port_vlans
*v
,
662 const struct sk_buff
*skb
)
667 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
668 const struct net_port_vlans
*v
,
674 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
679 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
684 static inline void br_vlan_flush(struct net_bridge
*br
)
688 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
693 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
698 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
702 static inline struct net_port_vlans
*br_get_vlan_info(
703 const struct net_bridge
*br
)
707 static inline struct net_port_vlans
*nbp_get_vlan_info(
708 const struct net_bridge_port
*p
)
713 static inline bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
)
718 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
722 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
724 return VLAN_N_VID
; /* Returns invalid vid */
729 #ifdef CONFIG_BRIDGE_NETFILTER
730 extern int br_netfilter_init(void);
731 extern void br_netfilter_fini(void);
732 extern void br_netfilter_rtable_init(struct net_bridge
*);
734 #define br_netfilter_init() (0)
735 #define br_netfilter_fini() do { } while(0)
736 #define br_netfilter_rtable_init(x)
740 extern void br_log_state(const struct net_bridge_port
*p
);
741 extern struct net_bridge_port
*br_get_port(struct net_bridge
*br
,
743 extern void br_init_port(struct net_bridge_port
*p
);
744 extern void br_become_designated_port(struct net_bridge_port
*p
);
746 extern void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
747 extern int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
748 extern int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
749 extern int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
753 extern void br_stp_enable_bridge(struct net_bridge
*br
);
754 extern void br_stp_disable_bridge(struct net_bridge
*br
);
755 extern void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
756 extern void br_stp_enable_port(struct net_bridge_port
*p
);
757 extern void br_stp_disable_port(struct net_bridge_port
*p
);
758 extern bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
759 extern void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
760 extern void br_stp_set_bridge_priority(struct net_bridge
*br
,
762 extern int br_stp_set_port_priority(struct net_bridge_port
*p
,
763 unsigned long newprio
);
764 extern int br_stp_set_path_cost(struct net_bridge_port
*p
,
765 unsigned long path_cost
);
766 extern ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
770 extern void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
771 struct net_device
*dev
);
774 extern void br_stp_timer_init(struct net_bridge
*br
);
775 extern void br_stp_port_timer_init(struct net_bridge_port
*p
);
776 extern unsigned long br_timer_value(const struct timer_list
*timer
);
779 #if IS_ENABLED(CONFIG_ATM_LANE)
780 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
784 extern struct rtnl_link_ops br_link_ops
;
785 extern int br_netlink_init(void);
786 extern void br_netlink_fini(void);
787 extern void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
788 extern int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
789 extern int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
790 extern int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
791 struct net_device
*dev
, u32 filter_mask
);
795 extern const struct sysfs_ops brport_sysfs_ops
;
796 extern int br_sysfs_addif(struct net_bridge_port
*p
);
797 extern int br_sysfs_renameif(struct net_bridge_port
*p
);
800 extern int br_sysfs_addbr(struct net_device
*dev
);
801 extern void br_sysfs_delbr(struct net_device
*dev
);
805 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
806 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
807 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
808 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
809 #endif /* CONFIG_SYSFS */