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 struct net_port_vlans
{
73 struct net_bridge_port
*port
;
74 struct net_bridge
*br
;
77 unsigned long vlan_bitmap
[BR_VLAN_BITMAP_LEN
];
78 unsigned long untagged_bitmap
[BR_VLAN_BITMAP_LEN
];
82 struct net_bridge_fdb_entry
84 struct hlist_node hlist
;
85 struct net_bridge_port
*dst
;
88 unsigned long updated
;
91 unsigned char is_local
;
92 unsigned char is_static
;
96 struct net_bridge_port_group
{
97 struct net_bridge_port
*port
;
98 struct net_bridge_port_group __rcu
*next
;
99 struct hlist_node mglist
;
101 struct timer_list timer
;
106 struct net_bridge_mdb_entry
108 struct hlist_node hlist
[2];
109 struct net_bridge
*br
;
110 struct net_bridge_port_group __rcu
*ports
;
112 struct timer_list timer
;
118 struct net_bridge_mdb_htable
120 struct hlist_head
*mhash
;
122 struct net_bridge_mdb_htable
*old
;
129 struct net_bridge_port
131 struct net_bridge
*br
;
132 struct net_device
*dev
;
133 struct list_head list
;
139 unsigned char topology_change_ack
;
140 unsigned char config_pending
;
142 port_id designated_port
;
143 bridge_id designated_root
;
144 bridge_id designated_bridge
;
147 unsigned long designated_age
;
149 struct timer_list forward_delay_timer
;
150 struct timer_list hold_timer
;
151 struct timer_list message_age_timer
;
156 #define BR_HAIRPIN_MODE 0x00000001
157 #define BR_BPDU_GUARD 0x00000002
158 #define BR_ROOT_BLOCK 0x00000004
159 #define BR_MULTICAST_FAST_LEAVE 0x00000008
160 #define BR_ADMIN_COST 0x00000010
161 #define BR_LEARNING 0x00000020
162 #define BR_FLOOD 0x00000040
164 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
165 u32 multicast_startup_queries_sent
;
166 unsigned char multicast_router
;
167 struct timer_list multicast_router_timer
;
168 struct timer_list multicast_query_timer
;
169 struct hlist_head mglist
;
170 struct hlist_node rlist
;
174 char sysfs_name
[IFNAMSIZ
];
177 #ifdef CONFIG_NET_POLL_CONTROLLER
180 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
181 struct net_port_vlans __rcu
*vlan_info
;
185 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
187 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
189 struct net_bridge_port
*port
=
190 rcu_dereference_rtnl(dev
->rx_handler_data
);
192 return br_port_exists(dev
) ? port
: NULL
;
195 static inline struct net_bridge_port
*br_port_get_rtnl(struct net_device
*dev
)
197 return br_port_exists(dev
) ?
198 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
201 struct br_cpu_netstats
{
206 struct u64_stats_sync syncp
;
212 struct list_head port_list
;
213 struct net_device
*dev
;
215 struct br_cpu_netstats __percpu
*stats
;
216 spinlock_t hash_lock
;
217 struct hlist_head hash
[BR_HASH_SIZE
];
218 #ifdef CONFIG_BRIDGE_NETFILTER
219 struct rtable fake_rtable
;
220 bool nf_call_iptables
;
221 bool nf_call_ip6tables
;
222 bool nf_call_arptables
;
227 bridge_id designated_root
;
230 unsigned long max_age
;
231 unsigned long hello_time
;
232 unsigned long forward_delay
;
233 unsigned long bridge_max_age
;
234 unsigned long ageing_time
;
235 unsigned long bridge_hello_time
;
236 unsigned long bridge_forward_delay
;
238 u8 group_addr
[ETH_ALEN
];
242 BR_NO_STP
, /* no spanning tree */
243 BR_KERNEL_STP
, /* old STP in kernel */
244 BR_USER_STP
, /* new RSTP in userspace */
247 unsigned char topology_change
;
248 unsigned char topology_change_detected
;
250 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
251 unsigned char multicast_router
;
253 u8 multicast_disabled
:1;
254 u8 multicast_querier
:1;
255 u8 multicast_query_use_ifaddr
:1;
260 u32 multicast_last_member_count
;
261 u32 multicast_startup_queries_sent
;
262 u32 multicast_startup_query_count
;
264 unsigned long multicast_last_member_interval
;
265 unsigned long multicast_membership_interval
;
266 unsigned long multicast_querier_interval
;
267 unsigned long multicast_query_interval
;
268 unsigned long multicast_query_response_interval
;
269 unsigned long multicast_startup_query_interval
;
270 unsigned long multicast_querier_delay_time
;
272 spinlock_t multicast_lock
;
273 struct net_bridge_mdb_htable __rcu
*mdb
;
274 struct hlist_head router_list
;
276 struct timer_list multicast_router_timer
;
277 struct timer_list multicast_querier_timer
;
278 struct timer_list multicast_query_timer
;
281 struct timer_list hello_timer
;
282 struct timer_list tcn_timer
;
283 struct timer_list topology_change_timer
;
284 struct timer_list gc_timer
;
285 struct kobject
*ifobj
;
286 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
288 struct net_port_vlans __rcu
*vlan_info
;
292 struct br_input_skb_cb
{
293 struct net_device
*brdev
;
294 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
300 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
302 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
303 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
305 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
308 #define br_printk(level, br, format, args...) \
309 printk(level "%s: " format, (br)->dev->name, ##args)
311 #define br_err(__br, format, args...) \
312 br_printk(KERN_ERR, __br, format, ##args)
313 #define br_warn(__br, format, args...) \
314 br_printk(KERN_WARNING, __br, format, ##args)
315 #define br_notice(__br, format, args...) \
316 br_printk(KERN_NOTICE, __br, format, ##args)
317 #define br_info(__br, format, args...) \
318 br_printk(KERN_INFO, __br, format, ##args)
320 #define br_debug(br, format, args...) \
321 pr_debug("%s: " format, (br)->dev->name, ##args)
323 extern struct notifier_block br_device_notifier
;
325 /* called under bridge lock */
326 static inline int br_is_root_bridge(const struct net_bridge
*br
)
328 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
332 extern void br_dev_setup(struct net_device
*dev
);
333 extern void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
334 extern netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
,
335 struct net_device
*dev
);
336 #ifdef CONFIG_NET_POLL_CONTROLLER
337 static inline struct netpoll_info
*br_netpoll_info(struct net_bridge
*br
)
339 return br
->dev
->npinfo
;
342 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
345 struct netpoll
*np
= p
->np
;
348 netpoll_send_skb(np
, skb
);
351 extern int br_netpoll_enable(struct net_bridge_port
*p
, gfp_t gfp
);
352 extern void br_netpoll_disable(struct net_bridge_port
*p
);
354 static inline struct netpoll_info
*br_netpoll_info(struct net_bridge
*br
)
359 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
364 static inline int br_netpoll_enable(struct net_bridge_port
*p
, gfp_t gfp
)
369 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
375 extern int br_fdb_init(void);
376 extern void br_fdb_fini(void);
377 extern void br_fdb_flush(struct net_bridge
*br
);
378 extern void br_fdb_changeaddr(struct net_bridge_port
*p
,
379 const unsigned char *newaddr
);
380 extern void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
381 extern void br_fdb_cleanup(unsigned long arg
);
382 extern void br_fdb_delete_by_port(struct net_bridge
*br
,
383 const struct net_bridge_port
*p
, int do_all
);
384 extern struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
385 const unsigned char *addr
,
387 extern int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
388 extern int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
,
389 unsigned long count
, unsigned long off
);
390 extern int br_fdb_insert(struct net_bridge
*br
,
391 struct net_bridge_port
*source
,
392 const unsigned char *addr
,
394 extern void br_fdb_update(struct net_bridge
*br
,
395 struct net_bridge_port
*source
,
396 const unsigned char *addr
,
398 extern int fdb_delete_by_addr(struct net_bridge
*br
, const u8
*addr
, u16 vid
);
400 extern int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
401 struct net_device
*dev
,
402 const unsigned char *addr
);
403 extern int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[],
404 struct net_device
*dev
,
405 const unsigned char *addr
,
407 extern int br_fdb_dump(struct sk_buff
*skb
,
408 struct netlink_callback
*cb
,
409 struct net_device
*dev
,
413 extern void br_deliver(const struct net_bridge_port
*to
,
414 struct sk_buff
*skb
);
415 extern int br_dev_queue_push_xmit(struct sk_buff
*skb
);
416 extern void br_forward(const struct net_bridge_port
*to
,
417 struct sk_buff
*skb
, struct sk_buff
*skb0
);
418 extern int br_forward_finish(struct sk_buff
*skb
);
419 extern void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
,
421 extern void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
422 struct sk_buff
*skb2
, bool unicast
);
425 extern void br_port_carrier_check(struct net_bridge_port
*p
);
426 extern int br_add_bridge(struct net
*net
, const char *name
);
427 extern int br_del_bridge(struct net
*net
, const char *name
);
428 extern void br_net_exit(struct net
*net
);
429 extern int br_add_if(struct net_bridge
*br
,
430 struct net_device
*dev
);
431 extern int br_del_if(struct net_bridge
*br
,
432 struct net_device
*dev
);
433 extern int br_min_mtu(const struct net_bridge
*br
);
434 extern netdev_features_t
br_features_recompute(struct net_bridge
*br
,
435 netdev_features_t features
);
438 extern int br_handle_frame_finish(struct sk_buff
*skb
);
439 extern rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
442 extern int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
443 extern int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
, void __user
*arg
);
446 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
447 extern unsigned int br_mdb_rehash_seq
;
448 extern int br_multicast_rcv(struct net_bridge
*br
,
449 struct net_bridge_port
*port
,
450 struct sk_buff
*skb
);
451 extern struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
452 struct sk_buff
*skb
, u16 vid
);
453 extern void br_multicast_add_port(struct net_bridge_port
*port
);
454 extern void br_multicast_del_port(struct net_bridge_port
*port
);
455 extern void br_multicast_enable_port(struct net_bridge_port
*port
);
456 extern void br_multicast_disable_port(struct net_bridge_port
*port
);
457 extern void br_multicast_init(struct net_bridge
*br
);
458 extern void br_multicast_open(struct net_bridge
*br
);
459 extern void br_multicast_stop(struct net_bridge
*br
);
460 extern void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
461 struct sk_buff
*skb
);
462 extern void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
463 struct sk_buff
*skb
, struct sk_buff
*skb2
);
464 extern int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
465 extern int br_multicast_set_port_router(struct net_bridge_port
*p
,
467 extern int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
468 extern int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
469 extern int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
470 extern struct net_bridge_mdb_entry
*br_mdb_ip_get(
471 struct net_bridge_mdb_htable
*mdb
,
473 extern struct net_bridge_mdb_entry
*br_multicast_new_group(struct net_bridge
*br
,
474 struct net_bridge_port
*port
, struct br_ip
*group
);
475 extern void br_multicast_free_pg(struct rcu_head
*head
);
476 extern struct net_bridge_port_group
*br_multicast_new_port_group(
477 struct net_bridge_port
*port
,
479 struct net_bridge_port_group
*next
,
480 unsigned char state
);
481 extern void br_mdb_init(void);
482 extern void br_mdb_uninit(void);
483 extern void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
484 struct br_ip
*group
, int type
);
486 #define mlock_dereference(X, br) \
487 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
489 #if IS_ENABLED(CONFIG_IPV6)
490 #include <net/addrconf.h>
491 static inline int ipv6_is_transient_multicast(const struct in6_addr
*addr
)
493 if (ipv6_addr_is_multicast(addr
) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr
))
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
));
506 static inline bool br_multicast_querier_exists(struct net_bridge
*br
)
508 return time_is_before_jiffies(br
->multicast_querier_delay_time
) &&
509 (br
->multicast_querier
||
510 timer_pending(&br
->multicast_querier_timer
));
513 static inline int br_multicast_rcv(struct net_bridge
*br
,
514 struct net_bridge_port
*port
,
520 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
521 struct sk_buff
*skb
, u16 vid
)
526 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
530 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
534 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
538 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
542 static inline void br_multicast_init(struct net_bridge
*br
)
546 static inline void br_multicast_open(struct net_bridge
*br
)
550 static inline void br_multicast_stop(struct net_bridge
*br
)
554 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
559 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
561 struct sk_buff
*skb2
)
564 static inline bool br_multicast_is_router(struct net_bridge
*br
)
568 static inline bool br_multicast_querier_exists(struct net_bridge
*br
)
572 static inline void br_mdb_init(void)
575 static inline void br_mdb_uninit(void)
581 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
582 extern bool br_allowed_ingress(struct net_bridge
*br
, struct net_port_vlans
*v
,
583 struct sk_buff
*skb
, u16
*vid
);
584 extern bool br_allowed_egress(struct net_bridge
*br
,
585 const struct net_port_vlans
*v
,
586 const struct sk_buff
*skb
);
587 extern struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
588 const struct net_port_vlans
*v
,
589 struct sk_buff
*skb
);
590 extern int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
591 extern int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
592 extern void br_vlan_flush(struct net_bridge
*br
);
593 extern int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
594 extern int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
595 extern int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
596 extern void nbp_vlan_flush(struct net_bridge_port
*port
);
597 extern bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
);
599 static inline struct net_port_vlans
*br_get_vlan_info(
600 const struct net_bridge
*br
)
602 return rcu_dereference_rtnl(br
->vlan_info
);
605 static inline struct net_port_vlans
*nbp_get_vlan_info(
606 const struct net_bridge_port
*p
)
608 return rcu_dereference_rtnl(p
->vlan_info
);
611 /* Since bridge now depends on 8021Q module, but the time bridge sees the
612 * skb, the vlan tag will always be present if the frame was tagged.
614 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
618 if (vlan_tx_tag_present(skb
))
619 *vid
= vlan_tx_tag_get(skb
) & VLAN_VID_MASK
;
628 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
630 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
634 return (v
->pvid
& VLAN_TAG_PRESENT
) ?
635 (v
->pvid
& ~VLAN_TAG_PRESENT
) :
640 static inline bool br_allowed_ingress(struct net_bridge
*br
,
641 struct net_port_vlans
*v
,
648 static inline bool br_allowed_egress(struct net_bridge
*br
,
649 const struct net_port_vlans
*v
,
650 const struct sk_buff
*skb
)
655 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
656 const struct net_port_vlans
*v
,
662 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
667 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
672 static inline void br_vlan_flush(struct net_bridge
*br
)
676 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
681 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
686 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
690 static inline struct net_port_vlans
*br_get_vlan_info(
691 const struct net_bridge
*br
)
695 static inline struct net_port_vlans
*nbp_get_vlan_info(
696 const struct net_bridge_port
*p
)
701 static inline bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
)
706 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
710 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
712 return VLAN_N_VID
; /* Returns invalid vid */
717 #ifdef CONFIG_BRIDGE_NETFILTER
718 extern int br_netfilter_init(void);
719 extern void br_netfilter_fini(void);
720 extern void br_netfilter_rtable_init(struct net_bridge
*);
722 #define br_netfilter_init() (0)
723 #define br_netfilter_fini() do { } while(0)
724 #define br_netfilter_rtable_init(x)
728 extern void br_log_state(const struct net_bridge_port
*p
);
729 extern struct net_bridge_port
*br_get_port(struct net_bridge
*br
,
731 extern void br_init_port(struct net_bridge_port
*p
);
732 extern void br_become_designated_port(struct net_bridge_port
*p
);
734 extern int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
735 extern int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
736 extern int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
740 extern void br_stp_enable_bridge(struct net_bridge
*br
);
741 extern void br_stp_disable_bridge(struct net_bridge
*br
);
742 extern void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
743 extern void br_stp_enable_port(struct net_bridge_port
*p
);
744 extern void br_stp_disable_port(struct net_bridge_port
*p
);
745 extern bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
746 extern void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
747 extern void br_stp_set_bridge_priority(struct net_bridge
*br
,
749 extern int br_stp_set_port_priority(struct net_bridge_port
*p
,
750 unsigned long newprio
);
751 extern int br_stp_set_path_cost(struct net_bridge_port
*p
,
752 unsigned long path_cost
);
753 extern ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
757 extern void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
758 struct net_device
*dev
);
761 extern void br_stp_timer_init(struct net_bridge
*br
);
762 extern void br_stp_port_timer_init(struct net_bridge_port
*p
);
763 extern unsigned long br_timer_value(const struct timer_list
*timer
);
766 #if IS_ENABLED(CONFIG_ATM_LANE)
767 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
771 extern struct rtnl_link_ops br_link_ops
;
772 extern int br_netlink_init(void);
773 extern void br_netlink_fini(void);
774 extern void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
775 extern int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
776 extern int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
777 extern int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
,
778 struct net_device
*dev
, u32 filter_mask
);
782 extern const struct sysfs_ops brport_sysfs_ops
;
783 extern int br_sysfs_addif(struct net_bridge_port
*p
);
784 extern int br_sysfs_renameif(struct net_bridge_port
*p
);
787 extern int br_sysfs_addbr(struct net_device
*dev
);
788 extern void br_sysfs_delbr(struct net_device
*dev
);
792 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
793 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
794 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
795 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
796 #endif /* CONFIG_SYSFS */