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1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
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.
11 */
12
13#ifndef _BR_PRIVATE_H
14#define _BR_PRIVATE_H
15
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 <net/ip6_fib.h>
22#include <linux/if_vlan.h>
23#include <linux/rhashtable.h>
24
25#define BR_HASH_BITS 8
26#define BR_HASH_SIZE (1 << BR_HASH_BITS)
27
28#define BR_HOLD_TIME (1*HZ)
29
30#define BR_PORT_BITS 10
31#define BR_MAX_PORTS (1<<BR_PORT_BITS)
32
33#define BR_VERSION "2.3"
34
35/* Control of forwarding link local multicast */
36#define BR_GROUPFWD_DEFAULT 0
37/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38#define BR_GROUPFWD_RESTRICTED 0x0007u
39/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40#define BR_GROUPFWD_8021AD 0xB801u
41
42/* Path to usermode spanning tree program */
43#define BR_STP_PROG "/sbin/bridge-stp"
44
45typedef struct bridge_id bridge_id;
46typedef struct mac_addr mac_addr;
47typedef __u16 port_id;
48
49struct bridge_id
50{
51 unsigned char prio[2];
52 unsigned char addr[ETH_ALEN];
53};
54
55struct mac_addr
56{
57 unsigned char addr[ETH_ALEN];
58};
59
60#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
61/* our own querier */
62struct bridge_mcast_own_query {
63 struct timer_list timer;
64 u32 startup_sent;
65};
66
67/* other querier */
68struct bridge_mcast_other_query {
69 struct timer_list timer;
70 unsigned long delay_time;
71};
72
73/* selected querier */
74struct bridge_mcast_querier {
75 struct br_ip addr;
76 struct net_bridge_port __rcu *port;
77};
78#endif
79
80/**
81 * struct net_bridge_vlan - per-vlan entry
82 *
83 * @vnode: rhashtable member
84 * @vid: VLAN id
85 * @flags: bridge vlan flags
86 * @br: if MASTER flag set, this points to a bridge struct
87 * @port: if MASTER flag unset, this points to a port struct
88 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
89 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
90 * for this VLAN entry
91 * @vlist: sorted list of VLAN entries
92 * @rcu: used for entry destruction
93 *
94 * This structure is shared between the global per-VLAN entries contained in
95 * the bridge rhashtable and the local per-port per-VLAN entries contained in
96 * the port's rhashtable. The union entries should be interpreted depending on
97 * the entry flags that are set.
98 */
99struct net_bridge_vlan {
100 struct rhash_head vnode;
101 u16 vid;
102 u16 flags;
103 union {
104 struct net_bridge *br;
105 struct net_bridge_port *port;
106 };
107 union {
108 atomic_t refcnt;
109 struct net_bridge_vlan *brvlan;
110 };
111 struct list_head vlist;
112
113 struct rcu_head rcu;
114};
115
116/**
117 * struct net_bridge_vlan_group
118 *
119 * @vlan_hash: VLAN entry rhashtable
120 * @vlan_list: sorted VLAN entry list
121 * @num_vlans: number of total VLAN entries
122 * @pvid: PVID VLAN id
123 *
124 * IMPORTANT: Be careful when checking if there're VLAN entries using list
125 * primitives because the bridge can have entries in its list which
126 * are just for global context but not for filtering, i.e. they have
127 * the master flag set but not the brentry flag. If you have to check
128 * if there're "real" entries in the bridge please test @num_vlans
129 */
130struct net_bridge_vlan_group {
131 struct rhashtable vlan_hash;
132 struct list_head vlan_list;
133 u16 num_vlans;
134 u16 pvid;
135};
136
137struct net_bridge_fdb_entry
138{
139 struct hlist_node hlist;
140 struct net_bridge_port *dst;
141
142 unsigned long updated;
143 unsigned long used;
144 mac_addr addr;
145 __u16 vlan_id;
146 unsigned char is_local:1,
147 is_static:1,
148 added_by_user:1,
149 added_by_external_learn:1;
150 struct rcu_head rcu;
151};
152
153#define MDB_PG_FLAGS_PERMANENT BIT(0)
154#define MDB_PG_FLAGS_OFFLOAD BIT(1)
155
156struct net_bridge_port_group {
157 struct net_bridge_port *port;
158 struct net_bridge_port_group __rcu *next;
159 struct hlist_node mglist;
160 struct rcu_head rcu;
161 struct timer_list timer;
162 struct br_ip addr;
163 unsigned char flags;
164};
165
166struct net_bridge_mdb_entry
167{
168 struct hlist_node hlist[2];
169 struct net_bridge *br;
170 struct net_bridge_port_group __rcu *ports;
171 struct rcu_head rcu;
172 struct timer_list timer;
173 struct br_ip addr;
174 bool mglist;
175};
176
177struct net_bridge_mdb_htable
178{
179 struct hlist_head *mhash;
180 struct rcu_head rcu;
181 struct net_bridge_mdb_htable *old;
182 u32 size;
183 u32 max;
184 u32 secret;
185 u32 ver;
186};
187
188struct net_bridge_port
189{
190 struct net_bridge *br;
191 struct net_device *dev;
192 struct list_head list;
193
194 /* STP */
195 u8 priority;
196 u8 state;
197 u16 port_no;
198 unsigned char topology_change_ack;
199 unsigned char config_pending;
200 port_id port_id;
201 port_id designated_port;
202 bridge_id designated_root;
203 bridge_id designated_bridge;
204 u32 path_cost;
205 u32 designated_cost;
206 unsigned long designated_age;
207
208 struct timer_list forward_delay_timer;
209 struct timer_list hold_timer;
210 struct timer_list message_age_timer;
211 struct kobject kobj;
212 struct rcu_head rcu;
213
214 unsigned long flags;
215
216#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
217 struct bridge_mcast_own_query ip4_own_query;
218#if IS_ENABLED(CONFIG_IPV6)
219 struct bridge_mcast_own_query ip6_own_query;
220#endif /* IS_ENABLED(CONFIG_IPV6) */
221 unsigned char multicast_router;
222 struct timer_list multicast_router_timer;
223 struct hlist_head mglist;
224 struct hlist_node rlist;
225#endif
226
227#ifdef CONFIG_SYSFS
228 char sysfs_name[IFNAMSIZ];
229#endif
230
231#ifdef CONFIG_NET_POLL_CONTROLLER
232 struct netpoll *np;
233#endif
234#ifdef CONFIG_BRIDGE_VLAN_FILTERING
235 struct net_bridge_vlan_group __rcu *vlgrp;
236#endif
237};
238
239#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
240#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
241
242#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
243
244static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
245{
246 return rcu_dereference(dev->rx_handler_data);
247}
248
249static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
250{
251 return br_port_exists(dev) ?
252 rtnl_dereference(dev->rx_handler_data) : NULL;
253}
254
255struct net_bridge
256{
257 spinlock_t lock;
258 struct list_head port_list;
259 struct net_device *dev;
260
261 struct pcpu_sw_netstats __percpu *stats;
262 spinlock_t hash_lock;
263 struct hlist_head hash[BR_HASH_SIZE];
264#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
265 union {
266 struct rtable fake_rtable;
267 struct rt6_info fake_rt6_info;
268 };
269 bool nf_call_iptables;
270 bool nf_call_ip6tables;
271 bool nf_call_arptables;
272#endif
273 u16 group_fwd_mask;
274 u16 group_fwd_mask_required;
275
276 /* STP */
277 bridge_id designated_root;
278 bridge_id bridge_id;
279 u32 root_path_cost;
280 unsigned long max_age;
281 unsigned long hello_time;
282 unsigned long forward_delay;
283 unsigned long bridge_max_age;
284 unsigned long ageing_time;
285 unsigned long bridge_hello_time;
286 unsigned long bridge_forward_delay;
287
288 u8 group_addr[ETH_ALEN];
289 bool group_addr_set;
290 u16 root_port;
291
292 enum {
293 BR_NO_STP, /* no spanning tree */
294 BR_KERNEL_STP, /* old STP in kernel */
295 BR_USER_STP, /* new RSTP in userspace */
296 } stp_enabled;
297
298 unsigned char topology_change;
299 unsigned char topology_change_detected;
300
301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302 unsigned char multicast_router;
303
304 u8 multicast_disabled:1;
305 u8 multicast_querier:1;
306 u8 multicast_query_use_ifaddr:1;
307
308 u32 hash_elasticity;
309 u32 hash_max;
310
311 u32 multicast_last_member_count;
312 u32 multicast_startup_query_count;
313
314 unsigned long multicast_last_member_interval;
315 unsigned long multicast_membership_interval;
316 unsigned long multicast_querier_interval;
317 unsigned long multicast_query_interval;
318 unsigned long multicast_query_response_interval;
319 unsigned long multicast_startup_query_interval;
320
321 spinlock_t multicast_lock;
322 struct net_bridge_mdb_htable __rcu *mdb;
323 struct hlist_head router_list;
324
325 struct timer_list multicast_router_timer;
326 struct bridge_mcast_other_query ip4_other_query;
327 struct bridge_mcast_own_query ip4_own_query;
328 struct bridge_mcast_querier ip4_querier;
329#if IS_ENABLED(CONFIG_IPV6)
330 struct bridge_mcast_other_query ip6_other_query;
331 struct bridge_mcast_own_query ip6_own_query;
332 struct bridge_mcast_querier ip6_querier;
333#endif /* IS_ENABLED(CONFIG_IPV6) */
334#endif
335
336 struct timer_list hello_timer;
337 struct timer_list tcn_timer;
338 struct timer_list topology_change_timer;
339 struct timer_list gc_timer;
340 struct kobject *ifobj;
341 u32 auto_cnt;
342#ifdef CONFIG_BRIDGE_VLAN_FILTERING
343 struct net_bridge_vlan_group __rcu *vlgrp;
344 u8 vlan_enabled;
345 __be16 vlan_proto;
346 u16 default_pvid;
347#endif
348};
349
350struct br_input_skb_cb {
351 struct net_device *brdev;
352
353#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
354 int igmp;
355 int mrouters_only;
356#endif
357
358 bool proxyarp_replied;
359
360#ifdef CONFIG_BRIDGE_VLAN_FILTERING
361 bool vlan_filtered;
362#endif
363};
364
365#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
366
367#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
368# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
369#else
370# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
371#endif
372
373#define br_printk(level, br, format, args...) \
374 printk(level "%s: " format, (br)->dev->name, ##args)
375
376#define br_err(__br, format, args...) \
377 br_printk(KERN_ERR, __br, format, ##args)
378#define br_warn(__br, format, args...) \
379 br_printk(KERN_WARNING, __br, format, ##args)
380#define br_notice(__br, format, args...) \
381 br_printk(KERN_NOTICE, __br, format, ##args)
382#define br_info(__br, format, args...) \
383 br_printk(KERN_INFO, __br, format, ##args)
384
385#define br_debug(br, format, args...) \
386 pr_debug("%s: " format, (br)->dev->name, ##args)
387
388/* called under bridge lock */
389static inline int br_is_root_bridge(const struct net_bridge *br)
390{
391 return !memcmp(&br->bridge_id, &br->designated_root, 8);
392}
393
394/* check if a VLAN entry is global */
395static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
396{
397 return v->flags & BRIDGE_VLAN_INFO_MASTER;
398}
399
400/* check if a VLAN entry is used by the bridge */
401static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
402{
403 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
404}
405
406/* check if we should use the vlan entry, returns false if it's only context */
407static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
408{
409 if (br_vlan_is_master(v)) {
410 if (br_vlan_is_brentry(v))
411 return true;
412 else
413 return false;
414 }
415
416 return true;
417}
418
419/* br_device.c */
420void br_dev_setup(struct net_device *dev);
421void br_dev_delete(struct net_device *dev, struct list_head *list);
422netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
423#ifdef CONFIG_NET_POLL_CONTROLLER
424static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
425 struct sk_buff *skb)
426{
427 struct netpoll *np = p->np;
428
429 if (np)
430 netpoll_send_skb(np, skb);
431}
432
433int br_netpoll_enable(struct net_bridge_port *p);
434void br_netpoll_disable(struct net_bridge_port *p);
435#else
436static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
437 struct sk_buff *skb)
438{
439}
440
441static inline int br_netpoll_enable(struct net_bridge_port *p)
442{
443 return 0;
444}
445
446static inline void br_netpoll_disable(struct net_bridge_port *p)
447{
448}
449#endif
450
451/* br_fdb.c */
452int br_fdb_init(void);
453void br_fdb_fini(void);
454void br_fdb_flush(struct net_bridge *br);
455void br_fdb_find_delete_local(struct net_bridge *br,
456 const struct net_bridge_port *p,
457 const unsigned char *addr, u16 vid);
458void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
459void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
460void br_fdb_cleanup(unsigned long arg);
461void br_fdb_delete_by_port(struct net_bridge *br,
462 const struct net_bridge_port *p, u16 vid, int do_all);
463struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
464 const unsigned char *addr, __u16 vid);
465int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
466int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
467 unsigned long off);
468int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
469 const unsigned char *addr, u16 vid);
470void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
471 const unsigned char *addr, u16 vid, bool added_by_user);
472
473int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
474 struct net_device *dev, const unsigned char *addr, u16 vid);
475int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
476 const unsigned char *addr, u16 vid, u16 nlh_flags);
477int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
478 struct net_device *dev, struct net_device *fdev, int idx);
479int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
480void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
481int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
482 const unsigned char *addr, u16 vid);
483int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
484 const unsigned char *addr, u16 vid);
485
486/* br_forward.c */
487void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
488int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
489void br_forward(const struct net_bridge_port *to,
490 struct sk_buff *skb, struct sk_buff *skb0);
491int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
492void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
493void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
494 struct sk_buff *skb2, bool unicast);
495
496/* br_if.c */
497void br_port_carrier_check(struct net_bridge_port *p);
498int br_add_bridge(struct net *net, const char *name);
499int br_del_bridge(struct net *net, const char *name);
500int br_add_if(struct net_bridge *br, struct net_device *dev);
501int br_del_if(struct net_bridge *br, struct net_device *dev);
502int br_min_mtu(const struct net_bridge *br);
503netdev_features_t br_features_recompute(struct net_bridge *br,
504 netdev_features_t features);
505void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
506void br_manage_promisc(struct net_bridge *br);
507
508/* br_input.c */
509int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
510rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
511
512static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
513{
514 return rcu_dereference(dev->rx_handler) == br_handle_frame;
515}
516
517static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
518{
519 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
520}
521
522/* br_ioctl.c */
523int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
525 void __user *arg);
526
527/* br_multicast.c */
528#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
529extern unsigned int br_mdb_rehash_seq;
530int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
531 struct sk_buff *skb, u16 vid);
532struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
533 struct sk_buff *skb, u16 vid);
534void br_multicast_add_port(struct net_bridge_port *port);
535void br_multicast_del_port(struct net_bridge_port *port);
536void br_multicast_enable_port(struct net_bridge_port *port);
537void br_multicast_disable_port(struct net_bridge_port *port);
538void br_multicast_init(struct net_bridge *br);
539void br_multicast_open(struct net_bridge *br);
540void br_multicast_stop(struct net_bridge *br);
541void br_multicast_dev_del(struct net_bridge *br);
542void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
543 struct sk_buff *skb);
544void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
545 struct sk_buff *skb, struct sk_buff *skb2);
546int br_multicast_set_router(struct net_bridge *br, unsigned long val);
547int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
548int br_multicast_toggle(struct net_bridge *br, unsigned long val);
549int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
550int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
551struct net_bridge_mdb_entry *
552br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
553struct net_bridge_mdb_entry *
554br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
555 struct br_ip *group);
556void br_multicast_free_pg(struct rcu_head *head);
557struct net_bridge_port_group *
558br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
559 struct net_bridge_port_group __rcu *next,
560 unsigned char flags);
561void br_mdb_init(void);
562void br_mdb_uninit(void);
563void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
564 struct br_ip *group, int type, u8 flags);
565void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
566 int type);
567
568#define mlock_dereference(X, br) \
569 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
570
571static inline bool br_multicast_is_router(struct net_bridge *br)
572{
573 return br->multicast_router == 2 ||
574 (br->multicast_router == 1 &&
575 timer_pending(&br->multicast_router_timer));
576}
577
578static inline bool
579__br_multicast_querier_exists(struct net_bridge *br,
580 struct bridge_mcast_other_query *querier)
581{
582 return time_is_before_jiffies(querier->delay_time) &&
583 (br->multicast_querier || timer_pending(&querier->timer));
584}
585
586static inline bool br_multicast_querier_exists(struct net_bridge *br,
587 struct ethhdr *eth)
588{
589 switch (eth->h_proto) {
590 case (htons(ETH_P_IP)):
591 return __br_multicast_querier_exists(br, &br->ip4_other_query);
592#if IS_ENABLED(CONFIG_IPV6)
593 case (htons(ETH_P_IPV6)):
594 return __br_multicast_querier_exists(br, &br->ip6_other_query);
595#endif
596 default:
597 return false;
598 }
599}
600#else
601static inline int br_multicast_rcv(struct net_bridge *br,
602 struct net_bridge_port *port,
603 struct sk_buff *skb,
604 u16 vid)
605{
606 return 0;
607}
608
609static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
610 struct sk_buff *skb, u16 vid)
611{
612 return NULL;
613}
614
615static inline void br_multicast_add_port(struct net_bridge_port *port)
616{
617}
618
619static inline void br_multicast_del_port(struct net_bridge_port *port)
620{
621}
622
623static inline void br_multicast_enable_port(struct net_bridge_port *port)
624{
625}
626
627static inline void br_multicast_disable_port(struct net_bridge_port *port)
628{
629}
630
631static inline void br_multicast_init(struct net_bridge *br)
632{
633}
634
635static inline void br_multicast_open(struct net_bridge *br)
636{
637}
638
639static inline void br_multicast_stop(struct net_bridge *br)
640{
641}
642
643static inline void br_multicast_dev_del(struct net_bridge *br)
644{
645}
646
647static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
648 struct sk_buff *skb)
649{
650}
651
652static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
653 struct sk_buff *skb,
654 struct sk_buff *skb2)
655{
656}
657static inline bool br_multicast_is_router(struct net_bridge *br)
658{
659 return 0;
660}
661static inline bool br_multicast_querier_exists(struct net_bridge *br,
662 struct ethhdr *eth)
663{
664 return false;
665}
666static inline void br_mdb_init(void)
667{
668}
669static inline void br_mdb_uninit(void)
670{
671}
672#endif
673
674/* br_vlan.c */
675#ifdef CONFIG_BRIDGE_VLAN_FILTERING
676bool br_allowed_ingress(const struct net_bridge *br,
677 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
678 u16 *vid);
679bool br_allowed_egress(struct net_bridge_vlan_group *vg,
680 const struct sk_buff *skb);
681bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
682struct sk_buff *br_handle_vlan(struct net_bridge *br,
683 struct net_bridge_vlan_group *vg,
684 struct sk_buff *skb);
685int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
686int br_vlan_delete(struct net_bridge *br, u16 vid);
687void br_vlan_flush(struct net_bridge *br);
688struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
689void br_recalculate_fwd_mask(struct net_bridge *br);
690int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
691int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
692int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
693int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
694int br_vlan_init(struct net_bridge *br);
695int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
696int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
697int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
698int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
699void nbp_vlan_flush(struct net_bridge_port *port);
700int nbp_vlan_init(struct net_bridge_port *port);
701int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
702
703static inline struct net_bridge_vlan_group *br_vlan_group(
704 const struct net_bridge *br)
705{
706 return rtnl_dereference(br->vlgrp);
707}
708
709static inline struct net_bridge_vlan_group *nbp_vlan_group(
710 const struct net_bridge_port *p)
711{
712 return rtnl_dereference(p->vlgrp);
713}
714
715static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
716 const struct net_bridge *br)
717{
718 return rcu_dereference(br->vlgrp);
719}
720
721static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
722 const struct net_bridge_port *p)
723{
724 return rcu_dereference(p->vlgrp);
725}
726
727/* Since bridge now depends on 8021Q module, but the time bridge sees the
728 * skb, the vlan tag will always be present if the frame was tagged.
729 */
730static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
731{
732 int err = 0;
733
734 if (skb_vlan_tag_present(skb)) {
735 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
736 } else {
737 *vid = 0;
738 err = -EINVAL;
739 }
740
741 return err;
742}
743
744static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
745{
746 if (!vg)
747 return 0;
748
749 smp_rmb();
750 return vg->pvid;
751}
752
753static inline int br_vlan_enabled(struct net_bridge *br)
754{
755 return br->vlan_enabled;
756}
757#else
758static inline bool br_allowed_ingress(const struct net_bridge *br,
759 struct net_bridge_vlan_group *vg,
760 struct sk_buff *skb,
761 u16 *vid)
762{
763 return true;
764}
765
766static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
767 const struct sk_buff *skb)
768{
769 return true;
770}
771
772static inline bool br_should_learn(struct net_bridge_port *p,
773 struct sk_buff *skb, u16 *vid)
774{
775 return true;
776}
777
778static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
779 struct net_bridge_vlan_group *vg,
780 struct sk_buff *skb)
781{
782 return skb;
783}
784
785static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
786{
787 return -EOPNOTSUPP;
788}
789
790static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
791{
792 return -EOPNOTSUPP;
793}
794
795static inline void br_vlan_flush(struct net_bridge *br)
796{
797}
798
799static inline void br_recalculate_fwd_mask(struct net_bridge *br)
800{
801}
802
803static inline int br_vlan_init(struct net_bridge *br)
804{
805 return 0;
806}
807
808static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
809{
810 return -EOPNOTSUPP;
811}
812
813static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
814{
815 return -EOPNOTSUPP;
816}
817
818static inline void nbp_vlan_flush(struct net_bridge_port *port)
819{
820}
821
822static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
823 u16 vid)
824{
825 return NULL;
826}
827
828static inline int nbp_vlan_init(struct net_bridge_port *port)
829{
830 return 0;
831}
832
833static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
834{
835 return 0;
836}
837
838static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
839{
840 return 0;
841}
842
843static inline int br_vlan_enabled(struct net_bridge *br)
844{
845 return 0;
846}
847
848static inline int __br_vlan_filter_toggle(struct net_bridge *br,
849 unsigned long val)
850{
851 return -EOPNOTSUPP;
852}
853
854static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
855 u32 filter_mask)
856{
857 return 0;
858}
859
860static inline struct net_bridge_vlan_group *br_vlan_group(
861 const struct net_bridge *br)
862{
863 return NULL;
864}
865
866static inline struct net_bridge_vlan_group *nbp_vlan_group(
867 const struct net_bridge_port *p)
868{
869 return NULL;
870}
871
872static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
873 const struct net_bridge *br)
874{
875 return NULL;
876}
877
878static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
879 const struct net_bridge_port *p)
880{
881 return NULL;
882}
883
884#endif
885
886struct nf_br_ops {
887 int (*br_dev_xmit_hook)(struct sk_buff *skb);
888};
889extern const struct nf_br_ops __rcu *nf_br_ops;
890
891/* br_netfilter.c */
892#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
893int br_nf_core_init(void);
894void br_nf_core_fini(void);
895void br_netfilter_rtable_init(struct net_bridge *);
896#else
897static inline int br_nf_core_init(void) { return 0; }
898static inline void br_nf_core_fini(void) {}
899#define br_netfilter_rtable_init(x)
900#endif
901
902/* br_stp.c */
903void br_set_state(struct net_bridge_port *p, unsigned int state);
904struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
905void br_init_port(struct net_bridge_port *p);
906void br_become_designated_port(struct net_bridge_port *p);
907
908void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
909int br_set_forward_delay(struct net_bridge *br, unsigned long x);
910int br_set_hello_time(struct net_bridge *br, unsigned long x);
911int br_set_max_age(struct net_bridge *br, unsigned long x);
912int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
913
914
915/* br_stp_if.c */
916void br_stp_enable_bridge(struct net_bridge *br);
917void br_stp_disable_bridge(struct net_bridge *br);
918void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
919void br_stp_enable_port(struct net_bridge_port *p);
920void br_stp_disable_port(struct net_bridge_port *p);
921bool br_stp_recalculate_bridge_id(struct net_bridge *br);
922void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
923void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
924int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
925int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
926ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
927
928/* br_stp_bpdu.c */
929struct stp_proto;
930void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
931 struct net_device *dev);
932
933/* br_stp_timer.c */
934void br_stp_timer_init(struct net_bridge *br);
935void br_stp_port_timer_init(struct net_bridge_port *p);
936unsigned long br_timer_value(const struct timer_list *timer);
937
938/* br.c */
939#if IS_ENABLED(CONFIG_ATM_LANE)
940extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
941#endif
942
943/* br_netlink.c */
944extern struct rtnl_link_ops br_link_ops;
945int br_netlink_init(void);
946void br_netlink_fini(void);
947void br_ifinfo_notify(int event, struct net_bridge_port *port);
948int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
949int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
950int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
951 u32 filter_mask, int nlflags);
952
953#ifdef CONFIG_SYSFS
954/* br_sysfs_if.c */
955extern const struct sysfs_ops brport_sysfs_ops;
956int br_sysfs_addif(struct net_bridge_port *p);
957int br_sysfs_renameif(struct net_bridge_port *p);
958
959/* br_sysfs_br.c */
960int br_sysfs_addbr(struct net_device *dev);
961void br_sysfs_delbr(struct net_device *dev);
962
963#else
964
965static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
966static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
967static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
968static inline void br_sysfs_delbr(struct net_device *dev) { return; }
969#endif /* CONFIG_SYSFS */
970
971#endif
1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
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.
11 */
12
13#ifndef _BR_PRIVATE_H
14#define _BR_PRIVATE_H
15
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
22#define BR_HASH_BITS 8
23#define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25#define BR_HOLD_TIME (1*HZ)
26
27#define BR_PORT_BITS 10
28#define BR_MAX_PORTS (1<<BR_PORT_BITS)
29
30#define BR_VERSION "2.3"
31
32/* Path to usermode spanning tree program */
33#define BR_STP_PROG "/sbin/bridge-stp"
34
35typedef struct bridge_id bridge_id;
36typedef struct mac_addr mac_addr;
37typedef __u16 port_id;
38
39struct bridge_id
40{
41 unsigned char prio[2];
42 unsigned char addr[6];
43};
44
45struct mac_addr
46{
47 unsigned char addr[6];
48};
49
50struct br_ip
51{
52 union {
53 __be32 ip4;
54#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
55 struct in6_addr ip6;
56#endif
57 } u;
58 __be16 proto;
59};
60
61struct net_bridge_fdb_entry
62{
63 struct hlist_node hlist;
64 struct net_bridge_port *dst;
65
66 struct rcu_head rcu;
67 unsigned long updated;
68 unsigned long used;
69 mac_addr addr;
70 unsigned char is_local;
71 unsigned char is_static;
72};
73
74struct net_bridge_port_group {
75 struct net_bridge_port *port;
76 struct net_bridge_port_group __rcu *next;
77 struct hlist_node mglist;
78 struct rcu_head rcu;
79 struct timer_list timer;
80 struct timer_list query_timer;
81 struct br_ip addr;
82 u32 queries_sent;
83};
84
85struct net_bridge_mdb_entry
86{
87 struct hlist_node hlist[2];
88 struct net_bridge *br;
89 struct net_bridge_port_group __rcu *ports;
90 struct rcu_head rcu;
91 struct timer_list timer;
92 struct timer_list query_timer;
93 struct br_ip addr;
94 bool mglist;
95 u32 queries_sent;
96};
97
98struct net_bridge_mdb_htable
99{
100 struct hlist_head *mhash;
101 struct rcu_head rcu;
102 struct net_bridge_mdb_htable *old;
103 u32 size;
104 u32 max;
105 u32 secret;
106 u32 ver;
107};
108
109struct net_bridge_port
110{
111 struct net_bridge *br;
112 struct net_device *dev;
113 struct list_head list;
114
115 /* STP */
116 u8 priority;
117 u8 state;
118 u16 port_no;
119 unsigned char topology_change_ack;
120 unsigned char config_pending;
121 port_id port_id;
122 port_id designated_port;
123 bridge_id designated_root;
124 bridge_id designated_bridge;
125 u32 path_cost;
126 u32 designated_cost;
127 unsigned long designated_age;
128
129 struct timer_list forward_delay_timer;
130 struct timer_list hold_timer;
131 struct timer_list message_age_timer;
132 struct kobject kobj;
133 struct rcu_head rcu;
134
135 unsigned long flags;
136#define BR_HAIRPIN_MODE 0x00000001
137
138#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
139 u32 multicast_startup_queries_sent;
140 unsigned char multicast_router;
141 struct timer_list multicast_router_timer;
142 struct timer_list multicast_query_timer;
143 struct hlist_head mglist;
144 struct hlist_node rlist;
145#endif
146
147#ifdef CONFIG_SYSFS
148 char sysfs_name[IFNAMSIZ];
149#endif
150
151#ifdef CONFIG_NET_POLL_CONTROLLER
152 struct netpoll *np;
153#endif
154};
155
156#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
157
158static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
159{
160 struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
161 return br_port_exists(dev) ? port : NULL;
162}
163
164static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
165{
166 return br_port_exists(dev) ?
167 rtnl_dereference(dev->rx_handler_data) : NULL;
168}
169
170struct br_cpu_netstats {
171 u64 rx_packets;
172 u64 rx_bytes;
173 u64 tx_packets;
174 u64 tx_bytes;
175 struct u64_stats_sync syncp;
176};
177
178struct net_bridge
179{
180 spinlock_t lock;
181 struct list_head port_list;
182 struct net_device *dev;
183
184 struct br_cpu_netstats __percpu *stats;
185 spinlock_t hash_lock;
186 struct hlist_head hash[BR_HASH_SIZE];
187#ifdef CONFIG_BRIDGE_NETFILTER
188 struct rtable fake_rtable;
189 bool nf_call_iptables;
190 bool nf_call_ip6tables;
191 bool nf_call_arptables;
192#endif
193 unsigned long flags;
194#define BR_SET_MAC_ADDR 0x00000001
195
196 /* STP */
197 bridge_id designated_root;
198 bridge_id bridge_id;
199 u32 root_path_cost;
200 unsigned long max_age;
201 unsigned long hello_time;
202 unsigned long forward_delay;
203 unsigned long bridge_max_age;
204 unsigned long ageing_time;
205 unsigned long bridge_hello_time;
206 unsigned long bridge_forward_delay;
207
208 u8 group_addr[ETH_ALEN];
209 u16 root_port;
210
211 enum {
212 BR_NO_STP, /* no spanning tree */
213 BR_KERNEL_STP, /* old STP in kernel */
214 BR_USER_STP, /* new RSTP in userspace */
215 } stp_enabled;
216
217 unsigned char topology_change;
218 unsigned char topology_change_detected;
219
220#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
221 unsigned char multicast_router;
222
223 u8 multicast_disabled:1;
224
225 u32 hash_elasticity;
226 u32 hash_max;
227
228 u32 multicast_last_member_count;
229 u32 multicast_startup_queries_sent;
230 u32 multicast_startup_query_count;
231
232 unsigned long multicast_last_member_interval;
233 unsigned long multicast_membership_interval;
234 unsigned long multicast_querier_interval;
235 unsigned long multicast_query_interval;
236 unsigned long multicast_query_response_interval;
237 unsigned long multicast_startup_query_interval;
238
239 spinlock_t multicast_lock;
240 struct net_bridge_mdb_htable __rcu *mdb;
241 struct hlist_head router_list;
242
243 struct timer_list multicast_router_timer;
244 struct timer_list multicast_querier_timer;
245 struct timer_list multicast_query_timer;
246#endif
247
248 struct timer_list hello_timer;
249 struct timer_list tcn_timer;
250 struct timer_list topology_change_timer;
251 struct timer_list gc_timer;
252 struct kobject *ifobj;
253};
254
255struct br_input_skb_cb {
256 struct net_device *brdev;
257#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258 int igmp;
259 int mrouters_only;
260#endif
261};
262
263#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
264
265#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
266# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
267#else
268# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
269#endif
270
271#define br_printk(level, br, format, args...) \
272 printk(level "%s: " format, (br)->dev->name, ##args)
273
274#define br_err(__br, format, args...) \
275 br_printk(KERN_ERR, __br, format, ##args)
276#define br_warn(__br, format, args...) \
277 br_printk(KERN_WARNING, __br, format, ##args)
278#define br_notice(__br, format, args...) \
279 br_printk(KERN_NOTICE, __br, format, ##args)
280#define br_info(__br, format, args...) \
281 br_printk(KERN_INFO, __br, format, ##args)
282
283#define br_debug(br, format, args...) \
284 pr_debug("%s: " format, (br)->dev->name, ##args)
285
286extern struct notifier_block br_device_notifier;
287extern const u8 br_group_address[ETH_ALEN];
288
289/* called under bridge lock */
290static inline int br_is_root_bridge(const struct net_bridge *br)
291{
292 return !memcmp(&br->bridge_id, &br->designated_root, 8);
293}
294
295/* br_device.c */
296extern void br_dev_setup(struct net_device *dev);
297extern void br_dev_delete(struct net_device *dev, struct list_head *list);
298extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
299 struct net_device *dev);
300#ifdef CONFIG_NET_POLL_CONTROLLER
301static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
302{
303 return br->dev->npinfo;
304}
305
306static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
307 struct sk_buff *skb)
308{
309 struct netpoll *np = p->np;
310
311 if (np)
312 netpoll_send_skb(np, skb);
313}
314
315extern int br_netpoll_enable(struct net_bridge_port *p);
316extern void br_netpoll_disable(struct net_bridge_port *p);
317#else
318static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
319{
320 return NULL;
321}
322
323static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
324 struct sk_buff *skb)
325{
326}
327
328static inline int br_netpoll_enable(struct net_bridge_port *p)
329{
330 return 0;
331}
332
333static inline void br_netpoll_disable(struct net_bridge_port *p)
334{
335}
336#endif
337
338/* br_fdb.c */
339extern int br_fdb_init(void);
340extern void br_fdb_fini(void);
341extern void br_fdb_flush(struct net_bridge *br);
342extern void br_fdb_changeaddr(struct net_bridge_port *p,
343 const unsigned char *newaddr);
344extern void br_fdb_cleanup(unsigned long arg);
345extern void br_fdb_delete_by_port(struct net_bridge *br,
346 const struct net_bridge_port *p, int do_all);
347extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
348 const unsigned char *addr);
349extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
350extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
351 unsigned long count, unsigned long off);
352extern int br_fdb_insert(struct net_bridge *br,
353 struct net_bridge_port *source,
354 const unsigned char *addr);
355extern void br_fdb_update(struct net_bridge *br,
356 struct net_bridge_port *source,
357 const unsigned char *addr);
358extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
359extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
360extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
361
362/* br_forward.c */
363extern void br_deliver(const struct net_bridge_port *to,
364 struct sk_buff *skb);
365extern int br_dev_queue_push_xmit(struct sk_buff *skb);
366extern void br_forward(const struct net_bridge_port *to,
367 struct sk_buff *skb, struct sk_buff *skb0);
368extern int br_forward_finish(struct sk_buff *skb);
369extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
370extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
371 struct sk_buff *skb2);
372
373/* br_if.c */
374extern void br_port_carrier_check(struct net_bridge_port *p);
375extern int br_add_bridge(struct net *net, const char *name);
376extern int br_del_bridge(struct net *net, const char *name);
377extern void br_net_exit(struct net *net);
378extern int br_add_if(struct net_bridge *br,
379 struct net_device *dev);
380extern int br_del_if(struct net_bridge *br,
381 struct net_device *dev);
382extern int br_min_mtu(const struct net_bridge *br);
383extern u32 br_features_recompute(struct net_bridge *br, u32 features);
384
385/* br_input.c */
386extern int br_handle_frame_finish(struct sk_buff *skb);
387extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
388
389/* br_ioctl.c */
390extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
391extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
392
393/* br_multicast.c */
394#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
395extern int br_multicast_rcv(struct net_bridge *br,
396 struct net_bridge_port *port,
397 struct sk_buff *skb);
398extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
399 struct sk_buff *skb);
400extern void br_multicast_add_port(struct net_bridge_port *port);
401extern void br_multicast_del_port(struct net_bridge_port *port);
402extern void br_multicast_enable_port(struct net_bridge_port *port);
403extern void br_multicast_disable_port(struct net_bridge_port *port);
404extern void br_multicast_init(struct net_bridge *br);
405extern void br_multicast_open(struct net_bridge *br);
406extern void br_multicast_stop(struct net_bridge *br);
407extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
408 struct sk_buff *skb);
409extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
410 struct sk_buff *skb, struct sk_buff *skb2);
411extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
412extern int br_multicast_set_port_router(struct net_bridge_port *p,
413 unsigned long val);
414extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
415extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
416
417static inline bool br_multicast_is_router(struct net_bridge *br)
418{
419 return br->multicast_router == 2 ||
420 (br->multicast_router == 1 &&
421 timer_pending(&br->multicast_router_timer));
422}
423#else
424static inline int br_multicast_rcv(struct net_bridge *br,
425 struct net_bridge_port *port,
426 struct sk_buff *skb)
427{
428 return 0;
429}
430
431static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
432 struct sk_buff *skb)
433{
434 return NULL;
435}
436
437static inline void br_multicast_add_port(struct net_bridge_port *port)
438{
439}
440
441static inline void br_multicast_del_port(struct net_bridge_port *port)
442{
443}
444
445static inline void br_multicast_enable_port(struct net_bridge_port *port)
446{
447}
448
449static inline void br_multicast_disable_port(struct net_bridge_port *port)
450{
451}
452
453static inline void br_multicast_init(struct net_bridge *br)
454{
455}
456
457static inline void br_multicast_open(struct net_bridge *br)
458{
459}
460
461static inline void br_multicast_stop(struct net_bridge *br)
462{
463}
464
465static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
466 struct sk_buff *skb)
467{
468}
469
470static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
471 struct sk_buff *skb,
472 struct sk_buff *skb2)
473{
474}
475static inline bool br_multicast_is_router(struct net_bridge *br)
476{
477 return 0;
478}
479#endif
480
481/* br_netfilter.c */
482#ifdef CONFIG_BRIDGE_NETFILTER
483extern int br_netfilter_init(void);
484extern void br_netfilter_fini(void);
485extern void br_netfilter_rtable_init(struct net_bridge *);
486#else
487#define br_netfilter_init() (0)
488#define br_netfilter_fini() do { } while(0)
489#define br_netfilter_rtable_init(x)
490#endif
491
492/* br_stp.c */
493extern void br_log_state(const struct net_bridge_port *p);
494extern struct net_bridge_port *br_get_port(struct net_bridge *br,
495 u16 port_no);
496extern void br_init_port(struct net_bridge_port *p);
497extern void br_become_designated_port(struct net_bridge_port *p);
498
499extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
500extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
501extern int br_set_max_age(struct net_bridge *br, unsigned long x);
502
503
504/* br_stp_if.c */
505extern void br_stp_enable_bridge(struct net_bridge *br);
506extern void br_stp_disable_bridge(struct net_bridge *br);
507extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
508extern void br_stp_enable_port(struct net_bridge_port *p);
509extern void br_stp_disable_port(struct net_bridge_port *p);
510extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
511extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
512extern void br_stp_set_bridge_priority(struct net_bridge *br,
513 u16 newprio);
514extern int br_stp_set_port_priority(struct net_bridge_port *p,
515 unsigned long newprio);
516extern int br_stp_set_path_cost(struct net_bridge_port *p,
517 unsigned long path_cost);
518extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
519
520/* br_stp_bpdu.c */
521struct stp_proto;
522extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
523 struct net_device *dev);
524
525/* br_stp_timer.c */
526extern void br_stp_timer_init(struct net_bridge *br);
527extern void br_stp_port_timer_init(struct net_bridge_port *p);
528extern unsigned long br_timer_value(const struct timer_list *timer);
529
530/* br.c */
531#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
532extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
533#endif
534
535/* br_netlink.c */
536extern int br_netlink_init(void);
537extern void br_netlink_fini(void);
538extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
539
540#ifdef CONFIG_SYSFS
541/* br_sysfs_if.c */
542extern const struct sysfs_ops brport_sysfs_ops;
543extern int br_sysfs_addif(struct net_bridge_port *p);
544extern int br_sysfs_renameif(struct net_bridge_port *p);
545
546/* br_sysfs_br.c */
547extern int br_sysfs_addbr(struct net_device *dev);
548extern void br_sysfs_delbr(struct net_device *dev);
549
550#else
551
552#define br_sysfs_addif(p) (0)
553#define br_sysfs_renameif(p) (0)
554#define br_sysfs_addbr(dev) (0)
555#define br_sysfs_delbr(dev) do { } while(0)
556#endif /* CONFIG_SYSFS */
557
558#endif