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
;
107 unsigned char added_by_user
;
111 struct net_bridge_port_group
{
112 struct net_bridge_port
*port
;
113 struct net_bridge_port_group __rcu
*next
;
114 struct hlist_node mglist
;
116 struct timer_list timer
;
121 struct net_bridge_mdb_entry
123 struct hlist_node hlist
[2];
124 struct net_bridge
*br
;
125 struct net_bridge_port_group __rcu
*ports
;
127 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
;
217 struct list_head port_list
;
218 struct net_device
*dev
;
220 struct pcpu_sw_netstats __percpu
*stats
;
221 spinlock_t hash_lock
;
222 struct hlist_head hash
[BR_HASH_SIZE
];
223 #ifdef CONFIG_BRIDGE_NETFILTER
224 struct rtable fake_rtable
;
225 bool nf_call_iptables
;
226 bool nf_call_ip6tables
;
227 bool nf_call_arptables
;
232 bridge_id designated_root
;
235 unsigned long max_age
;
236 unsigned long hello_time
;
237 unsigned long forward_delay
;
238 unsigned long bridge_max_age
;
239 unsigned long ageing_time
;
240 unsigned long bridge_hello_time
;
241 unsigned long bridge_forward_delay
;
243 u8 group_addr
[ETH_ALEN
];
247 BR_NO_STP
, /* no spanning tree */
248 BR_KERNEL_STP
, /* old STP in kernel */
249 BR_USER_STP
, /* new RSTP in userspace */
252 unsigned char topology_change
;
253 unsigned char topology_change_detected
;
255 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
256 unsigned char multicast_router
;
258 u8 multicast_disabled
:1;
259 u8 multicast_querier
:1;
260 u8 multicast_query_use_ifaddr
:1;
265 u32 multicast_last_member_count
;
266 u32 multicast_startup_query_count
;
268 unsigned long multicast_last_member_interval
;
269 unsigned long multicast_membership_interval
;
270 unsigned long multicast_querier_interval
;
271 unsigned long multicast_query_interval
;
272 unsigned long multicast_query_response_interval
;
273 unsigned long multicast_startup_query_interval
;
275 spinlock_t multicast_lock
;
276 struct net_bridge_mdb_htable __rcu
*mdb
;
277 struct hlist_head router_list
;
279 struct timer_list multicast_router_timer
;
280 struct bridge_mcast_querier ip4_querier
;
281 struct bridge_mcast_query ip4_query
;
282 #if IS_ENABLED(CONFIG_IPV6)
283 struct bridge_mcast_querier ip6_querier
;
284 struct bridge_mcast_query ip6_query
;
285 #endif /* IS_ENABLED(CONFIG_IPV6) */
288 struct timer_list hello_timer
;
289 struct timer_list tcn_timer
;
290 struct timer_list topology_change_timer
;
291 struct timer_list gc_timer
;
292 struct kobject
*ifobj
;
293 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
295 struct net_port_vlans __rcu
*vlan_info
;
299 struct br_input_skb_cb
{
300 struct net_device
*brdev
;
301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
307 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
309 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
310 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
312 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
315 #define br_printk(level, br, format, args...) \
316 printk(level "%s: " format, (br)->dev->name, ##args)
318 #define br_err(__br, format, args...) \
319 br_printk(KERN_ERR, __br, format, ##args)
320 #define br_warn(__br, format, args...) \
321 br_printk(KERN_WARNING, __br, format, ##args)
322 #define br_notice(__br, format, args...) \
323 br_printk(KERN_NOTICE, __br, format, ##args)
324 #define br_info(__br, format, args...) \
325 br_printk(KERN_INFO, __br, format, ##args)
327 #define br_debug(br, format, args...) \
328 pr_debug("%s: " format, (br)->dev->name, ##args)
330 extern struct notifier_block br_device_notifier
;
332 /* called under bridge lock */
333 static inline int br_is_root_bridge(const struct net_bridge
*br
)
335 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
339 void br_dev_setup(struct net_device
*dev
);
340 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
341 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
342 #ifdef CONFIG_NET_POLL_CONTROLLER
343 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
346 struct netpoll
*np
= p
->np
;
349 netpoll_send_skb(np
, skb
);
352 int br_netpoll_enable(struct net_bridge_port
*p
, gfp_t gfp
);
353 void br_netpoll_disable(struct net_bridge_port
*p
);
355 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
360 static inline int br_netpoll_enable(struct net_bridge_port
*p
, gfp_t gfp
)
365 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
371 int br_fdb_init(void);
372 void br_fdb_fini(void);
373 void br_fdb_flush(struct net_bridge
*br
);
374 void br_fdb_find_delete_local(struct net_bridge
*br
,
375 const struct net_bridge_port
*p
,
376 const unsigned char *addr
, u16 vid
);
377 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
378 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
379 void br_fdb_cleanup(unsigned long arg
);
380 void br_fdb_delete_by_port(struct net_bridge
*br
,
381 const struct net_bridge_port
*p
, int do_all
);
382 struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
383 const unsigned char *addr
, __u16 vid
);
384 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
385 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
387 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
388 const unsigned char *addr
, u16 vid
);
389 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
390 const unsigned char *addr
, u16 vid
, bool added_by_user
);
392 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
393 struct net_device
*dev
, const unsigned char *addr
);
394 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
395 const unsigned char *addr
, u16 nlh_flags
);
396 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
397 struct net_device
*dev
, int idx
);
400 void br_deliver(const struct net_bridge_port
*to
, struct sk_buff
*skb
);
401 int br_dev_queue_push_xmit(struct sk_buff
*skb
);
402 void br_forward(const struct net_bridge_port
*to
,
403 struct sk_buff
*skb
, struct sk_buff
*skb0
);
404 int br_forward_finish(struct sk_buff
*skb
);
405 void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
, bool unicast
);
406 void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
407 struct sk_buff
*skb2
, bool unicast
);
410 void br_port_carrier_check(struct net_bridge_port
*p
);
411 int br_add_bridge(struct net
*net
, const char *name
);
412 int br_del_bridge(struct net
*net
, const char *name
);
413 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
);
414 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
415 int br_min_mtu(const struct net_bridge
*br
);
416 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
417 netdev_features_t features
);
420 int br_handle_frame_finish(struct sk_buff
*skb
);
421 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
423 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
425 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
428 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
430 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
434 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
435 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
439 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
440 extern unsigned int br_mdb_rehash_seq
;
441 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
442 struct sk_buff
*skb
, u16 vid
);
443 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
444 struct sk_buff
*skb
, u16 vid
);
445 void br_multicast_add_port(struct net_bridge_port
*port
);
446 void br_multicast_del_port(struct net_bridge_port
*port
);
447 void br_multicast_enable_port(struct net_bridge_port
*port
);
448 void br_multicast_disable_port(struct net_bridge_port
*port
);
449 void br_multicast_init(struct net_bridge
*br
);
450 void br_multicast_open(struct net_bridge
*br
);
451 void br_multicast_stop(struct net_bridge
*br
);
452 void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
453 struct sk_buff
*skb
);
454 void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
455 struct sk_buff
*skb
, struct sk_buff
*skb2
);
456 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
457 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
458 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
459 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
460 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
461 struct net_bridge_mdb_entry
*
462 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
463 struct net_bridge_mdb_entry
*
464 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
465 struct br_ip
*group
);
466 void br_multicast_free_pg(struct rcu_head
*head
);
467 struct net_bridge_port_group
*
468 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
469 struct net_bridge_port_group __rcu
*next
,
470 unsigned char state
);
471 void br_mdb_init(void);
472 void br_mdb_uninit(void);
473 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
474 struct br_ip
*group
, int type
);
476 #define mlock_dereference(X, br) \
477 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
479 static inline bool br_multicast_is_router(struct net_bridge
*br
)
481 return br
->multicast_router
== 2 ||
482 (br
->multicast_router
== 1 &&
483 timer_pending(&br
->multicast_router_timer
));
487 __br_multicast_querier_exists(struct net_bridge
*br
,
488 struct bridge_mcast_querier
*querier
)
490 return time_is_before_jiffies(querier
->delay_time
) &&
491 (br
->multicast_querier
|| timer_pending(&querier
->timer
));
494 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
497 switch (eth
->h_proto
) {
498 case (htons(ETH_P_IP
)):
499 return __br_multicast_querier_exists(br
, &br
->ip4_querier
);
500 #if IS_ENABLED(CONFIG_IPV6)
501 case (htons(ETH_P_IPV6
)):
502 return __br_multicast_querier_exists(br
, &br
->ip6_querier
);
509 static inline int br_multicast_rcv(struct net_bridge
*br
,
510 struct net_bridge_port
*port
,
517 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
518 struct sk_buff
*skb
, u16 vid
)
523 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
527 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
531 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
535 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
539 static inline void br_multicast_init(struct net_bridge
*br
)
543 static inline void br_multicast_open(struct net_bridge
*br
)
547 static inline void br_multicast_stop(struct net_bridge
*br
)
551 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
556 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
558 struct sk_buff
*skb2
)
561 static inline bool br_multicast_is_router(struct net_bridge
*br
)
565 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
570 static inline void br_mdb_init(void)
573 static inline void br_mdb_uninit(void)
579 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
580 bool br_allowed_ingress(struct net_bridge
*br
, struct net_port_vlans
*v
,
581 struct sk_buff
*skb
, u16
*vid
);
582 bool br_allowed_egress(struct net_bridge
*br
, const struct net_port_vlans
*v
,
583 const struct sk_buff
*skb
);
584 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
585 const struct net_port_vlans
*v
,
586 struct sk_buff
*skb
);
587 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
588 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
589 void br_vlan_flush(struct net_bridge
*br
);
590 bool br_vlan_find(struct net_bridge
*br
, u16 vid
);
591 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
592 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
593 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
594 void nbp_vlan_flush(struct net_bridge_port
*port
);
595 bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
);
597 static inline struct net_port_vlans
*br_get_vlan_info(
598 const struct net_bridge
*br
)
600 return rcu_dereference_rtnl(br
->vlan_info
);
603 static inline struct net_port_vlans
*nbp_get_vlan_info(
604 const struct net_bridge_port
*p
)
606 return rcu_dereference_rtnl(p
->vlan_info
);
609 /* Since bridge now depends on 8021Q module, but the time bridge sees the
610 * skb, the vlan tag will always be present if the frame was tagged.
612 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
616 if (vlan_tx_tag_present(skb
))
617 *vid
= vlan_tx_tag_get(skb
) & VLAN_VID_MASK
;
626 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
628 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
632 return v
->pvid
?: VLAN_N_VID
;
636 static inline bool br_allowed_ingress(struct net_bridge
*br
,
637 struct net_port_vlans
*v
,
644 static inline bool br_allowed_egress(struct net_bridge
*br
,
645 const struct net_port_vlans
*v
,
646 const struct sk_buff
*skb
)
651 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
652 const struct net_port_vlans
*v
,
658 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
663 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
668 static inline void br_vlan_flush(struct net_bridge
*br
)
672 static inline bool br_vlan_find(struct net_bridge
*br
, u16 vid
)
677 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
682 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
687 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
691 static inline struct net_port_vlans
*br_get_vlan_info(
692 const struct net_bridge
*br
)
696 static inline struct net_port_vlans
*nbp_get_vlan_info(
697 const struct net_bridge_port
*p
)
702 static inline bool nbp_vlan_find(struct net_bridge_port
*port
, u16 vid
)
707 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
711 static inline u16
br_get_pvid(const struct net_port_vlans
*v
)
713 return VLAN_N_VID
; /* Returns invalid vid */
718 #ifdef CONFIG_BRIDGE_NETFILTER
719 int br_netfilter_init(void);
720 void br_netfilter_fini(void);
721 void br_netfilter_rtable_init(struct net_bridge
*);
723 #define br_netfilter_init() (0)
724 #define br_netfilter_fini() do { } while (0)
725 #define br_netfilter_rtable_init(x)
729 void br_log_state(const struct net_bridge_port
*p
);
730 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
731 void br_init_port(struct net_bridge_port
*p
);
732 void br_become_designated_port(struct net_bridge_port
*p
);
734 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
735 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
736 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
737 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
741 void br_stp_enable_bridge(struct net_bridge
*br
);
742 void br_stp_disable_bridge(struct net_bridge
*br
);
743 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
744 void br_stp_enable_port(struct net_bridge_port
*p
);
745 void br_stp_disable_port(struct net_bridge_port
*p
);
746 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
747 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
748 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
749 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
750 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
751 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
755 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
756 struct net_device
*dev
);
759 void br_stp_timer_init(struct net_bridge
*br
);
760 void br_stp_port_timer_init(struct net_bridge_port
*p
);
761 unsigned long br_timer_value(const struct timer_list
*timer
);
764 #if IS_ENABLED(CONFIG_ATM_LANE)
765 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
769 extern struct rtnl_link_ops br_link_ops
;
770 int br_netlink_init(void);
771 void br_netlink_fini(void);
772 void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
773 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
774 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
);
775 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
780 extern const struct sysfs_ops brport_sysfs_ops
;
781 int br_sysfs_addif(struct net_bridge_port
*p
);
782 int br_sysfs_renameif(struct net_bridge_port
*p
);
785 int br_sysfs_addbr(struct net_device
*dev
);
786 void br_sysfs_delbr(struct net_device
*dev
);
790 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
791 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
792 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
793 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
794 #endif /* CONFIG_SYSFS */