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];
249 BR_NO_STP, /* no spanning tree */
250 BR_KERNEL_STP, /* old STP in kernel */
251 BR_USER_STP, /* new RSTP in userspace */
254 unsigned char topology_change;
255 unsigned char topology_change_detected;
257 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258 unsigned char multicast_router;
260 u8 multicast_disabled:1;
261 u8 multicast_querier:1;
262 u8 multicast_query_use_ifaddr:1;
267 u32 multicast_last_member_count;
268 u32 multicast_startup_query_count;
270 unsigned long multicast_last_member_interval;
271 unsigned long multicast_membership_interval;
272 unsigned long multicast_querier_interval;
273 unsigned long multicast_query_interval;
274 unsigned long multicast_query_response_interval;
275 unsigned long multicast_startup_query_interval;
277 spinlock_t multicast_lock;
278 struct net_bridge_mdb_htable __rcu *mdb;
279 struct hlist_head router_list;
281 struct timer_list multicast_router_timer;
282 struct bridge_mcast_other_query ip4_other_query;
283 struct bridge_mcast_own_query ip4_own_query;
284 struct bridge_mcast_querier ip4_querier;
285 #if IS_ENABLED(CONFIG_IPV6)
286 struct bridge_mcast_other_query ip6_other_query;
287 struct bridge_mcast_own_query ip6_own_query;
288 struct bridge_mcast_querier ip6_querier;
289 #endif /* IS_ENABLED(CONFIG_IPV6) */
292 struct timer_list hello_timer;
293 struct timer_list tcn_timer;
294 struct timer_list topology_change_timer;
295 struct timer_list gc_timer;
296 struct kobject *ifobj;
298 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
301 struct net_port_vlans __rcu *vlan_info;
305 struct br_input_skb_cb {
306 struct net_device *brdev;
307 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
313 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
315 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
316 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
318 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
321 #define br_printk(level, br, format, args...) \
322 printk(level "%s: " format, (br)->dev->name, ##args)
324 #define br_err(__br, format, args...) \
325 br_printk(KERN_ERR, __br, format, ##args)
326 #define br_warn(__br, format, args...) \
327 br_printk(KERN_WARNING, __br, format, ##args)
328 #define br_notice(__br, format, args...) \
329 br_printk(KERN_NOTICE, __br, format, ##args)
330 #define br_info(__br, format, args...) \
331 br_printk(KERN_INFO, __br, format, ##args)
333 #define br_debug(br, format, args...) \
334 pr_debug("%s: " format, (br)->dev->name, ##args)
336 /* called under bridge lock */
337 static inline int br_is_root_bridge(const struct net_bridge *br)
339 return !memcmp(&br->bridge_id, &br->designated_root, 8);
343 void br_dev_setup(struct net_device *dev);
344 void br_dev_delete(struct net_device *dev, struct list_head *list);
345 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
346 #ifdef CONFIG_NET_POLL_CONTROLLER
347 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
350 struct netpoll *np = p->np;
353 netpoll_send_skb(np, skb);
356 int br_netpoll_enable(struct net_bridge_port *p);
357 void br_netpoll_disable(struct net_bridge_port *p);
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)
369 static inline void br_netpoll_disable(struct net_bridge_port *p)
375 int br_fdb_init(void);
376 void br_fdb_fini(void);
377 void br_fdb_flush(struct net_bridge *br);
378 void br_fdb_find_delete_local(struct net_bridge *br,
379 const struct net_bridge_port *p,
380 const unsigned char *addr, u16 vid);
381 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
382 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
383 void br_fdb_cleanup(unsigned long arg);
384 void br_fdb_delete_by_port(struct net_bridge *br,
385 const struct net_bridge_port *p, int do_all);
386 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
387 const unsigned char *addr, __u16 vid);
388 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
389 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
391 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
392 const unsigned char *addr, u16 vid);
393 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
394 const unsigned char *addr, u16 vid, bool added_by_user);
396 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
397 struct net_device *dev, const unsigned char *addr);
398 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
399 const unsigned char *addr, u16 nlh_flags);
400 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
401 struct net_device *dev, int idx);
402 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
403 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
406 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
407 int br_dev_queue_push_xmit(struct sk_buff *skb);
408 void br_forward(const struct net_bridge_port *to,
409 struct sk_buff *skb, struct sk_buff *skb0);
410 int br_forward_finish(struct sk_buff *skb);
411 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
412 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
413 struct sk_buff *skb2, bool unicast);
416 void br_port_carrier_check(struct net_bridge_port *p);
417 int br_add_bridge(struct net *net, const char *name);
418 int br_del_bridge(struct net *net, const char *name);
419 int br_add_if(struct net_bridge *br, struct net_device *dev);
420 int br_del_if(struct net_bridge *br, struct net_device *dev);
421 int br_min_mtu(const struct net_bridge *br);
422 netdev_features_t br_features_recompute(struct net_bridge *br,
423 netdev_features_t features);
424 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
425 void br_manage_promisc(struct net_bridge *br);
428 int br_handle_frame_finish(struct sk_buff *skb);
429 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
431 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
433 return rcu_dereference(dev->rx_handler) == br_handle_frame;
436 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
438 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
442 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
443 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
447 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
448 extern unsigned int br_mdb_rehash_seq;
449 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
450 struct sk_buff *skb, u16 vid);
451 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
452 struct sk_buff *skb, u16 vid);
453 void br_multicast_add_port(struct net_bridge_port *port);
454 void br_multicast_del_port(struct net_bridge_port *port);
455 void br_multicast_enable_port(struct net_bridge_port *port);
456 void br_multicast_disable_port(struct net_bridge_port *port);
457 void br_multicast_init(struct net_bridge *br);
458 void br_multicast_open(struct net_bridge *br);
459 void br_multicast_stop(struct net_bridge *br);
460 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
461 struct sk_buff *skb);
462 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
463 struct sk_buff *skb, struct sk_buff *skb2);
464 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
465 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
466 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
467 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
468 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
469 struct net_bridge_mdb_entry *
470 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
471 struct net_bridge_mdb_entry *
472 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
473 struct br_ip *group);
474 void br_multicast_free_pg(struct rcu_head *head);
475 struct net_bridge_port_group *
476 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
477 struct net_bridge_port_group __rcu *next,
478 unsigned char state);
479 void br_mdb_init(void);
480 void br_mdb_uninit(void);
481 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
482 struct br_ip *group, int type);
484 #define mlock_dereference(X, br) \
485 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
487 static inline bool br_multicast_is_router(struct net_bridge *br)
489 return br->multicast_router == 2 ||
490 (br->multicast_router == 1 &&
491 timer_pending(&br->multicast_router_timer));
495 __br_multicast_querier_exists(struct net_bridge *br,
496 struct bridge_mcast_other_query *querier)
498 return time_is_before_jiffies(querier->delay_time) &&
499 (br->multicast_querier || timer_pending(&querier->timer));
502 static inline bool br_multicast_querier_exists(struct net_bridge *br,
505 switch (eth->h_proto) {
506 case (htons(ETH_P_IP)):
507 return __br_multicast_querier_exists(br, &br->ip4_other_query);
508 #if IS_ENABLED(CONFIG_IPV6)
509 case (htons(ETH_P_IPV6)):
510 return __br_multicast_querier_exists(br, &br->ip6_other_query);
517 static inline int br_multicast_rcv(struct net_bridge *br,
518 struct net_bridge_port *port,
525 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
526 struct sk_buff *skb, u16 vid)
531 static inline void br_multicast_add_port(struct net_bridge_port *port)
535 static inline void br_multicast_del_port(struct net_bridge_port *port)
539 static inline void br_multicast_enable_port(struct net_bridge_port *port)
543 static inline void br_multicast_disable_port(struct net_bridge_port *port)
547 static inline void br_multicast_init(struct net_bridge *br)
551 static inline void br_multicast_open(struct net_bridge *br)
555 static inline void br_multicast_stop(struct net_bridge *br)
559 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
564 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
566 struct sk_buff *skb2)
569 static inline bool br_multicast_is_router(struct net_bridge *br)
573 static inline bool br_multicast_querier_exists(struct net_bridge *br,
578 static inline void br_mdb_init(void)
581 static inline void br_mdb_uninit(void)
587 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
588 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
589 struct sk_buff *skb, u16 *vid);
590 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
591 const struct sk_buff *skb);
592 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
593 struct sk_buff *br_handle_vlan(struct net_bridge *br,
594 const struct net_port_vlans *v,
595 struct sk_buff *skb);
596 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
597 int br_vlan_delete(struct net_bridge *br, u16 vid);
598 void br_vlan_flush(struct net_bridge *br);
599 bool br_vlan_find(struct net_bridge *br, u16 vid);
600 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
601 void br_vlan_init(struct net_bridge *br);
602 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
603 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
604 void nbp_vlan_flush(struct net_bridge_port *port);
605 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
607 static inline struct net_port_vlans *br_get_vlan_info(
608 const struct net_bridge *br)
610 return rcu_dereference_rtnl(br->vlan_info);
613 static inline struct net_port_vlans *nbp_get_vlan_info(
614 const struct net_bridge_port *p)
616 return rcu_dereference_rtnl(p->vlan_info);
619 /* Since bridge now depends on 8021Q module, but the time bridge sees the
620 * skb, the vlan tag will always be present if the frame was tagged.
622 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
626 if (vlan_tx_tag_present(skb))
627 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
636 static inline u16 br_get_pvid(const struct net_port_vlans *v)
638 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
642 return v->pvid ?: VLAN_N_VID;
645 static inline int br_vlan_enabled(struct net_bridge *br)
647 return br->vlan_enabled;
650 static inline bool br_allowed_ingress(struct net_bridge *br,
651 struct net_port_vlans *v,
658 static inline bool br_allowed_egress(struct net_bridge *br,
659 const struct net_port_vlans *v,
660 const struct sk_buff *skb)
665 static inline bool br_should_learn(struct net_bridge_port *p,
666 struct sk_buff *skb, u16 *vid)
671 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
672 const struct net_port_vlans *v,
678 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
683 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
688 static inline void br_vlan_flush(struct net_bridge *br)
692 static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
697 static inline void br_vlan_init(struct net_bridge *br)
701 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
706 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
711 static inline void nbp_vlan_flush(struct net_bridge_port *port)
715 static inline struct net_port_vlans *br_get_vlan_info(
716 const struct net_bridge *br)
720 static inline struct net_port_vlans *nbp_get_vlan_info(
721 const struct net_bridge_port *p)
726 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
731 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
735 static inline u16 br_get_pvid(const struct net_port_vlans *v)
737 return VLAN_N_VID; /* Returns invalid vid */
740 static inline int br_vlan_enabled(struct net_bridge *br)
747 #ifdef CONFIG_BRIDGE_NETFILTER
748 int br_netfilter_init(void);
749 void br_netfilter_fini(void);
750 void br_netfilter_rtable_init(struct net_bridge *);
752 #define br_netfilter_init() (0)
753 #define br_netfilter_fini() do { } while (0)
754 #define br_netfilter_rtable_init(x)
758 void br_log_state(const struct net_bridge_port *p);
759 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
760 void br_init_port(struct net_bridge_port *p);
761 void br_become_designated_port(struct net_bridge_port *p);
763 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
764 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
765 int br_set_hello_time(struct net_bridge *br, unsigned long x);
766 int br_set_max_age(struct net_bridge *br, unsigned long x);
770 void br_stp_enable_bridge(struct net_bridge *br);
771 void br_stp_disable_bridge(struct net_bridge *br);
772 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
773 void br_stp_enable_port(struct net_bridge_port *p);
774 void br_stp_disable_port(struct net_bridge_port *p);
775 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
776 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
777 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
778 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
779 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
780 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
784 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
785 struct net_device *dev);
788 void br_stp_timer_init(struct net_bridge *br);
789 void br_stp_port_timer_init(struct net_bridge_port *p);
790 unsigned long br_timer_value(const struct timer_list *timer);
793 #if IS_ENABLED(CONFIG_ATM_LANE)
794 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
798 extern struct rtnl_link_ops br_link_ops;
799 int br_netlink_init(void);
800 void br_netlink_fini(void);
801 void br_ifinfo_notify(int event, struct net_bridge_port *port);
802 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
803 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
804 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
809 extern const struct sysfs_ops brport_sysfs_ops;
810 int br_sysfs_addif(struct net_bridge_port *p);
811 int br_sysfs_renameif(struct net_bridge_port *p);
814 int br_sysfs_addbr(struct net_device *dev);
815 void br_sysfs_delbr(struct net_device *dev);
819 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
820 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
821 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
822 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
823 #endif /* CONFIG_SYSFS */