bridge: Implement vlan ingress/egress policy with PVID.
[linux-3.10.git] / net / bridge / br_private.h
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 <linux/if_vlan.h>
22
23 #define BR_HASH_BITS 8
24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
25
26 #define BR_HOLD_TIME (1*HZ)
27
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)
31
32 #define BR_VERSION      "2.3"
33
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
39 /* Path to usermode spanning tree program */
40 #define BR_STP_PROG     "/sbin/bridge-stp"
41
42 typedef struct bridge_id bridge_id;
43 typedef struct mac_addr mac_addr;
44 typedef __u16 port_id;
45
46 struct bridge_id
47 {
48         unsigned char   prio[2];
49         unsigned char   addr[6];
50 };
51
52 struct mac_addr
53 {
54         unsigned char   addr[6];
55 };
56
57 struct br_ip
58 {
59         union {
60                 __be32  ip4;
61 #if IS_ENABLED(CONFIG_IPV6)
62                 struct in6_addr ip6;
63 #endif
64         } u;
65         __be16          proto;
66 };
67
68 struct net_port_vlans {
69         u16                             port_idx;
70         u16                             pvid;
71         union {
72                 struct net_bridge_port          *port;
73                 struct net_bridge               *br;
74         }                               parent;
75         struct rcu_head                 rcu;
76         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
77         u16                             num_vlans;
78 };
79
80 struct net_bridge_fdb_entry
81 {
82         struct hlist_node               hlist;
83         struct net_bridge_port          *dst;
84
85         struct rcu_head                 rcu;
86         unsigned long                   updated;
87         unsigned long                   used;
88         mac_addr                        addr;
89         unsigned char                   is_local;
90         unsigned char                   is_static;
91 };
92
93 struct net_bridge_port_group {
94         struct net_bridge_port          *port;
95         struct net_bridge_port_group __rcu *next;
96         struct hlist_node               mglist;
97         struct rcu_head                 rcu;
98         struct timer_list               timer;
99         struct br_ip                    addr;
100         unsigned char                   state;
101 };
102
103 struct net_bridge_mdb_entry
104 {
105         struct hlist_node               hlist[2];
106         struct net_bridge               *br;
107         struct net_bridge_port_group __rcu *ports;
108         struct rcu_head                 rcu;
109         struct timer_list               timer;
110         struct br_ip                    addr;
111         bool                            mglist;
112 };
113
114 struct net_bridge_mdb_htable
115 {
116         struct hlist_head               *mhash;
117         struct rcu_head                 rcu;
118         struct net_bridge_mdb_htable    *old;
119         u32                             size;
120         u32                             max;
121         u32                             secret;
122         u32                             ver;
123 };
124
125 struct net_bridge_port
126 {
127         struct net_bridge               *br;
128         struct net_device               *dev;
129         struct list_head                list;
130
131         /* STP */
132         u8                              priority;
133         u8                              state;
134         u16                             port_no;
135         unsigned char                   topology_change_ack;
136         unsigned char                   config_pending;
137         port_id                         port_id;
138         port_id                         designated_port;
139         bridge_id                       designated_root;
140         bridge_id                       designated_bridge;
141         u32                             path_cost;
142         u32                             designated_cost;
143         unsigned long                   designated_age;
144
145         struct timer_list               forward_delay_timer;
146         struct timer_list               hold_timer;
147         struct timer_list               message_age_timer;
148         struct kobject                  kobj;
149         struct rcu_head                 rcu;
150
151         unsigned long                   flags;
152 #define BR_HAIRPIN_MODE         0x00000001
153 #define BR_BPDU_GUARD           0x00000002
154 #define BR_ROOT_BLOCK           0x00000004
155 #define BR_MULTICAST_FAST_LEAVE 0x00000008
156
157 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
158         u32                             multicast_startup_queries_sent;
159         unsigned char                   multicast_router;
160         struct timer_list               multicast_router_timer;
161         struct timer_list               multicast_query_timer;
162         struct hlist_head               mglist;
163         struct hlist_node               rlist;
164 #endif
165
166 #ifdef CONFIG_SYSFS
167         char                            sysfs_name[IFNAMSIZ];
168 #endif
169
170 #ifdef CONFIG_NET_POLL_CONTROLLER
171         struct netpoll                  *np;
172 #endif
173 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
174         struct net_port_vlans __rcu     *vlan_info;
175 #endif
176 };
177
178 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
179
180 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
181 {
182         struct net_bridge_port *port =
183                         rcu_dereference_rtnl(dev->rx_handler_data);
184
185         return br_port_exists(dev) ? port : NULL;
186 }
187
188 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
189 {
190         return br_port_exists(dev) ?
191                 rtnl_dereference(dev->rx_handler_data) : NULL;
192 }
193
194 struct br_cpu_netstats {
195         u64                     rx_packets;
196         u64                     rx_bytes;
197         u64                     tx_packets;
198         u64                     tx_bytes;
199         struct u64_stats_sync   syncp;
200 };
201
202 struct net_bridge
203 {
204         spinlock_t                      lock;
205         struct list_head                port_list;
206         struct net_device               *dev;
207
208         struct br_cpu_netstats __percpu *stats;
209         spinlock_t                      hash_lock;
210         struct hlist_head               hash[BR_HASH_SIZE];
211 #ifdef CONFIG_BRIDGE_NETFILTER
212         struct rtable                   fake_rtable;
213         bool                            nf_call_iptables;
214         bool                            nf_call_ip6tables;
215         bool                            nf_call_arptables;
216 #endif
217         u16                             group_fwd_mask;
218
219         /* STP */
220         bridge_id                       designated_root;
221         bridge_id                       bridge_id;
222         u32                             root_path_cost;
223         unsigned long                   max_age;
224         unsigned long                   hello_time;
225         unsigned long                   forward_delay;
226         unsigned long                   bridge_max_age;
227         unsigned long                   ageing_time;
228         unsigned long                   bridge_hello_time;
229         unsigned long                   bridge_forward_delay;
230
231         u8                              group_addr[ETH_ALEN];
232         u16                             root_port;
233
234         enum {
235                 BR_NO_STP,              /* no spanning tree */
236                 BR_KERNEL_STP,          /* old STP in kernel */
237                 BR_USER_STP,            /* new RSTP in userspace */
238         } stp_enabled;
239
240         unsigned char                   topology_change;
241         unsigned char                   topology_change_detected;
242
243 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
244         unsigned char                   multicast_router;
245
246         u8                              multicast_disabled:1;
247         u8                              multicast_querier:1;
248
249         u32                             hash_elasticity;
250         u32                             hash_max;
251
252         u32                             multicast_last_member_count;
253         u32                             multicast_startup_queries_sent;
254         u32                             multicast_startup_query_count;
255
256         unsigned long                   multicast_last_member_interval;
257         unsigned long                   multicast_membership_interval;
258         unsigned long                   multicast_querier_interval;
259         unsigned long                   multicast_query_interval;
260         unsigned long                   multicast_query_response_interval;
261         unsigned long                   multicast_startup_query_interval;
262
263         spinlock_t                      multicast_lock;
264         struct net_bridge_mdb_htable __rcu *mdb;
265         struct hlist_head               router_list;
266
267         struct timer_list               multicast_router_timer;
268         struct timer_list               multicast_querier_timer;
269         struct timer_list               multicast_query_timer;
270 #endif
271
272         struct timer_list               hello_timer;
273         struct timer_list               tcn_timer;
274         struct timer_list               topology_change_timer;
275         struct timer_list               gc_timer;
276         struct kobject                  *ifobj;
277 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
278         u8                              vlan_enabled;
279         struct net_port_vlans __rcu     *vlan_info;
280 #endif
281 };
282
283 struct br_input_skb_cb {
284         struct net_device *brdev;
285 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
286         int igmp;
287         int mrouters_only;
288 #endif
289 };
290
291 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
292
293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
294 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
295 #else
296 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
297 #endif
298
299 #define br_printk(level, br, format, args...)   \
300         printk(level "%s: " format, (br)->dev->name, ##args)
301
302 #define br_err(__br, format, args...)                   \
303         br_printk(KERN_ERR, __br, format, ##args)
304 #define br_warn(__br, format, args...)                  \
305         br_printk(KERN_WARNING, __br, format, ##args)
306 #define br_notice(__br, format, args...)                \
307         br_printk(KERN_NOTICE, __br, format, ##args)
308 #define br_info(__br, format, args...)                  \
309         br_printk(KERN_INFO, __br, format, ##args)
310
311 #define br_debug(br, format, args...)                   \
312         pr_debug("%s: " format,  (br)->dev->name, ##args)
313
314 extern struct notifier_block br_device_notifier;
315
316 /* called under bridge lock */
317 static inline int br_is_root_bridge(const struct net_bridge *br)
318 {
319         return !memcmp(&br->bridge_id, &br->designated_root, 8);
320 }
321
322 /* br_device.c */
323 extern void br_dev_setup(struct net_device *dev);
324 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
325 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
326                                struct net_device *dev);
327 #ifdef CONFIG_NET_POLL_CONTROLLER
328 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
329 {
330         return br->dev->npinfo;
331 }
332
333 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
334                                        struct sk_buff *skb)
335 {
336         struct netpoll *np = p->np;
337
338         if (np)
339                 netpoll_send_skb(np, skb);
340 }
341
342 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
343 extern void br_netpoll_disable(struct net_bridge_port *p);
344 #else
345 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
346 {
347         return NULL;
348 }
349
350 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
351                                        struct sk_buff *skb)
352 {
353 }
354
355 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
356 {
357         return 0;
358 }
359
360 static inline void br_netpoll_disable(struct net_bridge_port *p)
361 {
362 }
363 #endif
364
365 /* br_fdb.c */
366 extern int br_fdb_init(void);
367 extern void br_fdb_fini(void);
368 extern void br_fdb_flush(struct net_bridge *br);
369 extern void br_fdb_changeaddr(struct net_bridge_port *p,
370                               const unsigned char *newaddr);
371 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
372 extern void br_fdb_cleanup(unsigned long arg);
373 extern void br_fdb_delete_by_port(struct net_bridge *br,
374                                   const struct net_bridge_port *p, int do_all);
375 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
376                                                  const unsigned char *addr);
377 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
378 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
379                           unsigned long count, unsigned long off);
380 extern int br_fdb_insert(struct net_bridge *br,
381                          struct net_bridge_port *source,
382                          const unsigned char *addr);
383 extern void br_fdb_update(struct net_bridge *br,
384                           struct net_bridge_port *source,
385                           const unsigned char *addr);
386
387 extern int br_fdb_delete(struct ndmsg *ndm,
388                          struct net_device *dev,
389                          const unsigned char *addr);
390 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
391                       struct net_device *dev,
392                       const unsigned char *addr,
393                       u16 nlh_flags);
394 extern int br_fdb_dump(struct sk_buff *skb,
395                        struct netlink_callback *cb,
396                        struct net_device *dev,
397                        int idx);
398
399 /* br_forward.c */
400 extern void br_deliver(const struct net_bridge_port *to,
401                 struct sk_buff *skb);
402 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
403 extern void br_forward(const struct net_bridge_port *to,
404                 struct sk_buff *skb, struct sk_buff *skb0);
405 extern int br_forward_finish(struct sk_buff *skb);
406 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
407 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
408                              struct sk_buff *skb2);
409
410 /* br_if.c */
411 extern void br_port_carrier_check(struct net_bridge_port *p);
412 extern int br_add_bridge(struct net *net, const char *name);
413 extern int br_del_bridge(struct net *net, const char *name);
414 extern void br_net_exit(struct net *net);
415 extern int br_add_if(struct net_bridge *br,
416               struct net_device *dev);
417 extern int br_del_if(struct net_bridge *br,
418               struct net_device *dev);
419 extern int br_min_mtu(const struct net_bridge *br);
420 extern netdev_features_t br_features_recompute(struct net_bridge *br,
421         netdev_features_t features);
422
423 /* br_input.c */
424 extern int br_handle_frame_finish(struct sk_buff *skb);
425 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
426
427 /* br_ioctl.c */
428 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
429 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
430
431 /* br_multicast.c */
432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
433 extern unsigned int br_mdb_rehash_seq;
434 extern int br_multicast_rcv(struct net_bridge *br,
435                             struct net_bridge_port *port,
436                             struct sk_buff *skb);
437 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
438                                                struct sk_buff *skb);
439 extern void br_multicast_add_port(struct net_bridge_port *port);
440 extern void br_multicast_del_port(struct net_bridge_port *port);
441 extern void br_multicast_enable_port(struct net_bridge_port *port);
442 extern void br_multicast_disable_port(struct net_bridge_port *port);
443 extern void br_multicast_init(struct net_bridge *br);
444 extern void br_multicast_open(struct net_bridge *br);
445 extern void br_multicast_stop(struct net_bridge *br);
446 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
447                                  struct sk_buff *skb);
448 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
449                                  struct sk_buff *skb, struct sk_buff *skb2);
450 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
451 extern int br_multicast_set_port_router(struct net_bridge_port *p,
452                                         unsigned long val);
453 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
454 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
455 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
456 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
457                                 struct net_bridge_mdb_htable *mdb,
458                                 struct br_ip *dst);
459 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
460                                 struct net_bridge_port *port, struct br_ip *group);
461 extern void br_multicast_free_pg(struct rcu_head *head);
462 extern struct net_bridge_port_group *br_multicast_new_port_group(
463                                 struct net_bridge_port *port,
464                                 struct br_ip *group,
465                                 struct net_bridge_port_group *next,
466                                 unsigned char state);
467 extern void br_mdb_init(void);
468 extern void br_mdb_uninit(void);
469 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
470                           struct br_ip *group, int type);
471
472 #define mlock_dereference(X, br) \
473         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
474
475 #if IS_ENABLED(CONFIG_IPV6)
476 #include <net/addrconf.h>
477 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
478 {
479         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
480                 return 1;
481         return 0;
482 }
483 #endif
484
485 static inline bool br_multicast_is_router(struct net_bridge *br)
486 {
487         return br->multicast_router == 2 ||
488                (br->multicast_router == 1 &&
489                 timer_pending(&br->multicast_router_timer));
490 }
491 #else
492 static inline int br_multicast_rcv(struct net_bridge *br,
493                                    struct net_bridge_port *port,
494                                    struct sk_buff *skb)
495 {
496         return 0;
497 }
498
499 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
500                                                       struct sk_buff *skb)
501 {
502         return NULL;
503 }
504
505 static inline void br_multicast_add_port(struct net_bridge_port *port)
506 {
507 }
508
509 static inline void br_multicast_del_port(struct net_bridge_port *port)
510 {
511 }
512
513 static inline void br_multicast_enable_port(struct net_bridge_port *port)
514 {
515 }
516
517 static inline void br_multicast_disable_port(struct net_bridge_port *port)
518 {
519 }
520
521 static inline void br_multicast_init(struct net_bridge *br)
522 {
523 }
524
525 static inline void br_multicast_open(struct net_bridge *br)
526 {
527 }
528
529 static inline void br_multicast_stop(struct net_bridge *br)
530 {
531 }
532
533 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
534                                         struct sk_buff *skb)
535 {
536 }
537
538 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
539                                         struct sk_buff *skb,
540                                         struct sk_buff *skb2)
541 {
542 }
543 static inline bool br_multicast_is_router(struct net_bridge *br)
544 {
545         return 0;
546 }
547 static inline void br_mdb_init(void)
548 {
549 }
550 static inline void br_mdb_uninit(void)
551 {
552 }
553 #endif
554
555 /* br_vlan.c */
556 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
557 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
558                                struct sk_buff *skb, u16 *vid);
559 extern bool br_allowed_egress(struct net_bridge *br,
560                               const struct net_port_vlans *v,
561                               const struct sk_buff *skb);
562 extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
563                                       const struct net_port_vlans *v,
564                                       struct sk_buff *skb);
565 extern int br_vlan_add(struct net_bridge *br, u16 vid);
566 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
567 extern void br_vlan_flush(struct net_bridge *br);
568 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
569 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid);
570 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
571 extern void nbp_vlan_flush(struct net_bridge_port *port);
572
573 static inline struct net_port_vlans *br_get_vlan_info(
574                                                 const struct net_bridge *br)
575 {
576         return rcu_dereference(br->vlan_info);
577 }
578
579 static inline struct net_port_vlans *nbp_get_vlan_info(
580                                                 const struct net_bridge_port *p)
581 {
582         return rcu_dereference(p->vlan_info);
583 }
584
585 /* Since bridge now depends on 8021Q module, but the time bridge sees the
586  * skb, the vlan tag will always be present if the frame was tagged.
587  */
588 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
589 {
590         int err = 0;
591
592         if (vlan_tx_tag_present(skb))
593                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
594         else {
595                 *vid = 0;
596                 err = -EINVAL;
597         }
598
599         return err;
600 }
601
602 static inline u16 br_get_pvid(const struct net_port_vlans *v)
603 {
604         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
605          * vid wasn't set
606          */
607         smp_rmb();
608         return (v->pvid & VLAN_TAG_PRESENT) ?
609                         (v->pvid & ~VLAN_TAG_PRESENT) :
610                         VLAN_N_VID;
611 }
612
613 #else
614 static inline bool br_allowed_ingress(struct net_bridge *br,
615                                       struct net_port_vlans *v,
616                                       struct sk_buff *skb,
617                                       u16 *vid)
618 {
619         return true;
620 }
621
622 static inline bool br_allowed_egress(struct net_bridge *br,
623                                      const struct net_port_vlans *v,
624                                      const struct sk_buff *skb)
625 {
626         return true;
627 }
628
629 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
630                                              const struct net_port_vlans *v,
631                                              struct sk_buff *skb)
632 {
633         return skb;
634 }
635
636 static inline int br_vlan_add(struct net_bridge *br, u16 vid)
637 {
638         return -EOPNOTSUPP;
639 }
640
641 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
642 {
643         return -EOPNOTSUPP;
644 }
645
646 static inline void br_vlan_flush(struct net_bridge *br)
647 {
648 }
649
650 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid)
651 {
652         return -EOPNOTSUPP;
653 }
654
655 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
656 {
657         return -EOPNOTSUPP;
658 }
659
660 static inline void nbp_vlan_flush(struct net_bridge_port *port)
661 {
662 }
663
664 static inline struct net_port_vlans *br_get_vlan_info(
665                                                 const struct net_bridge *br)
666 {
667         return NULL;
668 }
669 static inline struct net_port_vlans *nbp_get_vlan_info(
670                                                 const struct net_bridge_port *p)
671 {
672         return NULL;
673 }
674
675 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
676 {
677         return 0;
678 }
679 static inline u16 br_get_pvid(const struct net_port_vlans *v)
680 {
681         return VLAN_N_VID;      /* Returns invalid vid */
682 }
683 #endif
684
685 /* br_netfilter.c */
686 #ifdef CONFIG_BRIDGE_NETFILTER
687 extern int br_netfilter_init(void);
688 extern void br_netfilter_fini(void);
689 extern void br_netfilter_rtable_init(struct net_bridge *);
690 #else
691 #define br_netfilter_init()     (0)
692 #define br_netfilter_fini()     do { } while(0)
693 #define br_netfilter_rtable_init(x)
694 #endif
695
696 /* br_stp.c */
697 extern void br_log_state(const struct net_bridge_port *p);
698 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
699                                            u16 port_no);
700 extern void br_init_port(struct net_bridge_port *p);
701 extern void br_become_designated_port(struct net_bridge_port *p);
702
703 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
704 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
705 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
706
707
708 /* br_stp_if.c */
709 extern void br_stp_enable_bridge(struct net_bridge *br);
710 extern void br_stp_disable_bridge(struct net_bridge *br);
711 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
712 extern void br_stp_enable_port(struct net_bridge_port *p);
713 extern void br_stp_disable_port(struct net_bridge_port *p);
714 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
715 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
716 extern void br_stp_set_bridge_priority(struct net_bridge *br,
717                                        u16 newprio);
718 extern int br_stp_set_port_priority(struct net_bridge_port *p,
719                                     unsigned long newprio);
720 extern int br_stp_set_path_cost(struct net_bridge_port *p,
721                                 unsigned long path_cost);
722 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
723
724 /* br_stp_bpdu.c */
725 struct stp_proto;
726 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
727                        struct net_device *dev);
728
729 /* br_stp_timer.c */
730 extern void br_stp_timer_init(struct net_bridge *br);
731 extern void br_stp_port_timer_init(struct net_bridge_port *p);
732 extern unsigned long br_timer_value(const struct timer_list *timer);
733
734 /* br.c */
735 #if IS_ENABLED(CONFIG_ATM_LANE)
736 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
737 #endif
738
739 /* br_netlink.c */
740 extern struct rtnl_link_ops br_link_ops;
741 extern int br_netlink_init(void);
742 extern void br_netlink_fini(void);
743 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
744 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
745 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
746 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
747                       struct net_device *dev, u32 filter_mask);
748
749 #ifdef CONFIG_SYSFS
750 /* br_sysfs_if.c */
751 extern const struct sysfs_ops brport_sysfs_ops;
752 extern int br_sysfs_addif(struct net_bridge_port *p);
753 extern int br_sysfs_renameif(struct net_bridge_port *p);
754
755 /* br_sysfs_br.c */
756 extern int br_sysfs_addbr(struct net_device *dev);
757 extern void br_sysfs_delbr(struct net_device *dev);
758
759 #else
760
761 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
762 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
763 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
764 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
765 #endif /* CONFIG_SYSFS */
766
767 #endif