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TOMOYO Linux Cross Reference
Linux/net/bridge/br_private.h

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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 <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         __u16           vid;
 67 };
 68 
 69 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 70 /* our own querier */
 71 struct bridge_mcast_query {
 72         struct timer_list       timer;
 73         u32                     startup_sent;
 74 };
 75 
 76 /* other querier */
 77 struct bridge_mcast_querier {
 78         struct timer_list               timer;
 79         unsigned long                   delay_time;
 80 };
 81 #endif
 82 
 83 struct net_port_vlans {
 84         u16                             port_idx;
 85         u16                             pvid;
 86         union {
 87                 struct net_bridge_port          *port;
 88                 struct net_bridge               *br;
 89         }                               parent;
 90         struct rcu_head                 rcu;
 91         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
 92         unsigned long                   untagged_bitmap[BR_VLAN_BITMAP_LEN];
 93         u16                             num_vlans;
 94 };
 95 
 96 struct net_bridge_fdb_entry
 97 {
 98         struct hlist_node               hlist;
 99         struct net_bridge_port          *dst;
100 
101         struct rcu_head                 rcu;
102         unsigned long                   updated;
103         unsigned long                   used;
104         mac_addr                        addr;
105         unsigned char                   is_local;
106         unsigned char                   is_static;
107         __u16                           vlan_id;
108 };
109 
110 struct net_bridge_port_group {
111         struct net_bridge_port          *port;
112         struct net_bridge_port_group __rcu *next;
113         struct hlist_node               mglist;
114         struct rcu_head                 rcu;
115         struct timer_list               timer;
116         struct br_ip                    addr;
117         unsigned char                   state;
118 };
119 
120 struct net_bridge_mdb_entry
121 {
122         struct hlist_node               hlist[2];
123         struct net_bridge               *br;
124         struct net_bridge_port_group __rcu *ports;
125         struct rcu_head                 rcu;
126         struct timer_list               timer;
127         struct br_ip                    addr;
128         bool                            mglist;
129 };
130 
131 struct net_bridge_mdb_htable
132 {
133         struct hlist_head               *mhash;
134         struct rcu_head                 rcu;
135         struct net_bridge_mdb_htable    *old;
136         u32                             size;
137         u32                             max;
138         u32                             secret;
139         u32                             ver;
140 };
141 
142 struct net_bridge_port
143 {
144         struct net_bridge               *br;
145         struct net_device               *dev;
146         struct list_head                list;
147 
148         /* STP */
149         u8                              priority;
150         u8                              state;
151         u16                             port_no;
152         unsigned char                   topology_change_ack;
153         unsigned char                   config_pending;
154         port_id                         port_id;
155         port_id                         designated_port;
156         bridge_id                       designated_root;
157         bridge_id                       designated_bridge;
158         u32                             path_cost;
159         u32                             designated_cost;
160         unsigned long                   designated_age;
161 
162         struct timer_list               forward_delay_timer;
163         struct timer_list               hold_timer;
164         struct timer_list               message_age_timer;
165         struct kobject                  kobj;
166         struct rcu_head                 rcu;
167 
168         unsigned long                   flags;
169 #define BR_HAIRPIN_MODE         0x00000001
170 #define BR_BPDU_GUARD           0x00000002
171 #define BR_ROOT_BLOCK           0x00000004
172 #define BR_MULTICAST_FAST_LEAVE 0x00000008
173 #define BR_ADMIN_COST           0x00000010
174 #define BR_LEARNING             0x00000020
175 #define BR_FLOOD                0x00000040
176 
177 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
178         struct bridge_mcast_query       ip4_query;
179 #if IS_ENABLED(CONFIG_IPV6)
180         struct bridge_mcast_query       ip6_query;
181 #endif /* IS_ENABLED(CONFIG_IPV6) */
182         unsigned char                   multicast_router;
183         struct timer_list               multicast_router_timer;
184         struct hlist_head               mglist;
185         struct hlist_node               rlist;
186 #endif
187 
188 #ifdef CONFIG_SYSFS
189         char                            sysfs_name[IFNAMSIZ];
190 #endif
191 
192 #ifdef CONFIG_NET_POLL_CONTROLLER
193         struct netpoll                  *np;
194 #endif
195 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
196         struct net_port_vlans __rcu     *vlan_info;
197 #endif
198 };
199 
200 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
201 
202 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
203 {
204         return rcu_dereference(dev->rx_handler_data);
205 }
206 
207 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
208 {
209         return br_port_exists(dev) ?
210                 rtnl_dereference(dev->rx_handler_data) : NULL;
211 }
212 
213 struct br_cpu_netstats {
214         u64                     rx_packets;
215         u64                     rx_bytes;
216         u64                     tx_packets;
217         u64                     tx_bytes;
218         struct u64_stats_sync   syncp;
219 };
220 
221 struct net_bridge
222 {
223         spinlock_t                      lock;
224         struct list_head                port_list;
225         struct net_device               *dev;
226 
227         struct br_cpu_netstats __percpu *stats;
228         spinlock_t                      hash_lock;
229         struct hlist_head               hash[BR_HASH_SIZE];
230 #ifdef CONFIG_BRIDGE_NETFILTER
231         struct rtable                   fake_rtable;
232         bool                            nf_call_iptables;
233         bool                            nf_call_ip6tables;
234         bool                            nf_call_arptables;
235 #endif
236         u16                             group_fwd_mask;
237 
238         /* STP */
239         bridge_id                       designated_root;
240         bridge_id                       bridge_id;
241         u32                             root_path_cost;
242         unsigned long                   max_age;
243         unsigned long                   hello_time;
244         unsigned long                   forward_delay;
245         unsigned long                   bridge_max_age;
246         unsigned long                   ageing_time;
247         unsigned long                   bridge_hello_time;
248         unsigned long                   bridge_forward_delay;
249 
250         u8                              group_addr[ETH_ALEN];
251         u16                             root_port;
252 
253         enum {
254                 BR_NO_STP,              /* no spanning tree */
255                 BR_KERNEL_STP,          /* old STP in kernel */
256                 BR_USER_STP,            /* new RSTP in userspace */
257         } stp_enabled;
258 
259         unsigned char                   topology_change;
260         unsigned char                   topology_change_detected;
261 
262 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
263         unsigned char                   multicast_router;
264 
265         u8                              multicast_disabled:1;
266         u8                              multicast_querier:1;
267         u8                              multicast_query_use_ifaddr:1;
268 
269         u32                             hash_elasticity;
270         u32                             hash_max;
271 
272         u32                             multicast_last_member_count;
273         u32                             multicast_startup_query_count;
274 
275         unsigned long                   multicast_last_member_interval;
276         unsigned long                   multicast_membership_interval;
277         unsigned long                   multicast_querier_interval;
278         unsigned long                   multicast_query_interval;
279         unsigned long                   multicast_query_response_interval;
280         unsigned long                   multicast_startup_query_interval;
281 
282         spinlock_t                      multicast_lock;
283         struct net_bridge_mdb_htable __rcu *mdb;
284         struct hlist_head               router_list;
285 
286         struct timer_list               multicast_router_timer;
287         struct bridge_mcast_querier     ip4_querier;
288         struct bridge_mcast_query       ip4_query;
289 #if IS_ENABLED(CONFIG_IPV6)
290         struct bridge_mcast_querier     ip6_querier;
291         struct bridge_mcast_query       ip6_query;
292 #endif /* IS_ENABLED(CONFIG_IPV6) */
293 #endif
294 
295         struct timer_list               hello_timer;
296         struct timer_list               tcn_timer;
297         struct timer_list               topology_change_timer;
298         struct timer_list               gc_timer;
299         struct kobject                  *ifobj;
300 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
301         u8                              vlan_enabled;
302         struct net_port_vlans __rcu     *vlan_info;
303 #endif
304 };
305 
306 struct br_input_skb_cb {
307         struct net_device *brdev;
308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
309         int igmp;
310         int mrouters_only;
311 #endif
312 };
313 
314 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
315 
316 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
317 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
318 #else
319 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
320 #endif
321 
322 #define br_printk(level, br, format, args...)   \
323         printk(level "%s: " format, (br)->dev->name, ##args)
324 
325 #define br_err(__br, format, args...)                   \
326         br_printk(KERN_ERR, __br, format, ##args)
327 #define br_warn(__br, format, args...)                  \
328         br_printk(KERN_WARNING, __br, format, ##args)
329 #define br_notice(__br, format, args...)                \
330         br_printk(KERN_NOTICE, __br, format, ##args)
331 #define br_info(__br, format, args...)                  \
332         br_printk(KERN_INFO, __br, format, ##args)
333 
334 #define br_debug(br, format, args...)                   \
335         pr_debug("%s: " format,  (br)->dev->name, ##args)
336 
337 extern struct notifier_block br_device_notifier;
338 
339 /* called under bridge lock */
340 static inline int br_is_root_bridge(const struct net_bridge *br)
341 {
342         return !memcmp(&br->bridge_id, &br->designated_root, 8);
343 }
344 
345 /* br_device.c */
346 void br_dev_setup(struct net_device *dev);
347 void br_dev_delete(struct net_device *dev, struct list_head *list);
348 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
349 #ifdef CONFIG_NET_POLL_CONTROLLER
350 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
351                                        struct sk_buff *skb)
352 {
353         struct netpoll *np = p->np;
354 
355         if (np)
356                 netpoll_send_skb(np, skb);
357 }
358 
359 int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
360 void br_netpoll_disable(struct net_bridge_port *p);
361 #else
362 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
363                                        struct sk_buff *skb)
364 {
365 }
366 
367 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
368 {
369         return 0;
370 }
371 
372 static inline void br_netpoll_disable(struct net_bridge_port *p)
373 {
374 }
375 #endif
376 
377 /* br_fdb.c */
378 int br_fdb_init(void);
379 void br_fdb_fini(void);
380 void br_fdb_flush(struct net_bridge *br);
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,
390                    unsigned long off);
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);
395 int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
396 
397 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
398                   struct net_device *dev, const unsigned char *addr);
399 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
400                const unsigned char *addr, u16 nlh_flags);
401 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
402                 struct net_device *dev, int idx);
403 
404 /* br_forward.c */
405 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
406 int br_dev_queue_push_xmit(struct sk_buff *skb);
407 void br_forward(const struct net_bridge_port *to,
408                 struct sk_buff *skb, struct sk_buff *skb0);
409 int br_forward_finish(struct sk_buff *skb);
410 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
411 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
412                       struct sk_buff *skb2, bool unicast);
413 
414 /* br_if.c */
415 void br_port_carrier_check(struct net_bridge_port *p);
416 int br_add_bridge(struct net *net, const char *name);
417 int br_del_bridge(struct net *net, const char *name);
418 void br_net_exit(struct net *net);
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 
425 /* br_input.c */
426 int br_handle_frame_finish(struct sk_buff *skb);
427 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
428 
429 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
430 {
431         return rcu_dereference(dev->rx_handler) == br_handle_frame;
432 }
433 
434 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
435 {
436         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
437 }
438 
439 /* br_ioctl.c */
440 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
441 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
442                              void __user *arg);
443 
444 /* br_multicast.c */
445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
446 extern unsigned int br_mdb_rehash_seq;
447 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
448                      struct sk_buff *skb, u16 vid);
449 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
450                                         struct sk_buff *skb, u16 vid);
451 void br_multicast_add_port(struct net_bridge_port *port);
452 void br_multicast_del_port(struct net_bridge_port *port);
453 void br_multicast_enable_port(struct net_bridge_port *port);
454 void br_multicast_disable_port(struct net_bridge_port *port);
455 void br_multicast_init(struct net_bridge *br);
456 void br_multicast_open(struct net_bridge *br);
457 void br_multicast_stop(struct net_bridge *br);
458 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
459                           struct sk_buff *skb);
460 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
461                           struct sk_buff *skb, struct sk_buff *skb2);
462 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
463 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
464 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
465 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
466 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
467 struct net_bridge_mdb_entry *
468 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
469 struct net_bridge_mdb_entry *
470 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
471                        struct br_ip *group);
472 void br_multicast_free_pg(struct rcu_head *head);
473 struct net_bridge_port_group *
474 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
475                             struct net_bridge_port_group __rcu *next,
476                             unsigned char state);
477 void br_mdb_init(void);
478 void br_mdb_uninit(void);
479 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
480                    struct br_ip *group, int type);
481 
482 #define mlock_dereference(X, br) \
483         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
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 
492 static inline bool
493 __br_multicast_querier_exists(struct net_bridge *br,
494                               struct bridge_mcast_querier *querier)
495 {
496         return time_is_before_jiffies(querier->delay_time) &&
497                (br->multicast_querier || timer_pending(&querier->timer));
498 }
499 
500 static inline bool br_multicast_querier_exists(struct net_bridge *br,
501                                                struct ethhdr *eth)
502 {
503         switch (eth->h_proto) {
504         case (htons(ETH_P_IP)):
505                 return __br_multicast_querier_exists(br, &br->ip4_querier);
506 #if IS_ENABLED(CONFIG_IPV6)
507         case (htons(ETH_P_IPV6)):
508                 return __br_multicast_querier_exists(br, &br->ip6_querier);
509 #endif
510         default:
511                 return false;
512         }
513 }
514 #else
515 static inline int br_multicast_rcv(struct net_bridge *br,
516                                    struct net_bridge_port *port,
517                                    struct sk_buff *skb,
518                                    u16 vid)
519 {
520         return 0;
521 }
522 
523 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
524                                                       struct sk_buff *skb, u16 vid)
525 {
526         return NULL;
527 }
528 
529 static inline void br_multicast_add_port(struct net_bridge_port *port)
530 {
531 }
532 
533 static inline void br_multicast_del_port(struct net_bridge_port *port)
534 {
535 }
536 
537 static inline void br_multicast_enable_port(struct net_bridge_port *port)
538 {
539 }
540 
541 static inline void br_multicast_disable_port(struct net_bridge_port *port)
542 {
543 }
544 
545 static inline void br_multicast_init(struct net_bridge *br)
546 {
547 }
548 
549 static inline void br_multicast_open(struct net_bridge *br)
550 {
551 }
552 
553 static inline void br_multicast_stop(struct net_bridge *br)
554 {
555 }
556 
557 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
558                                         struct sk_buff *skb)
559 {
560 }
561 
562 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
563                                         struct sk_buff *skb,
564                                         struct sk_buff *skb2)
565 {
566 }
567 static inline bool br_multicast_is_router(struct net_bridge *br)
568 {
569         return 0;
570 }
571 static inline bool br_multicast_querier_exists(struct net_bridge *br,
572                                                struct ethhdr *eth)
573 {
574         return false;
575 }
576 static inline void br_mdb_init(void)
577 {
578 }
579 static inline void br_mdb_uninit(void)
580 {
581 }
582 #endif
583 
584 /* br_vlan.c */
585 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
586 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
587                         struct sk_buff *skb, u16 *vid);
588 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
589                        const struct sk_buff *skb);
590 struct sk_buff *br_handle_vlan(struct net_bridge *br,
591                                const struct net_port_vlans *v,
592                                struct sk_buff *skb);
593 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
594 int br_vlan_delete(struct net_bridge *br, u16 vid);
595 void br_vlan_flush(struct net_bridge *br);
596 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
597 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
598 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
599 void nbp_vlan_flush(struct net_bridge_port *port);
600 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
601 
602 static inline struct net_port_vlans *br_get_vlan_info(
603                                                 const struct net_bridge *br)
604 {
605         return rcu_dereference_rtnl(br->vlan_info);
606 }
607 
608 static inline struct net_port_vlans *nbp_get_vlan_info(
609                                                 const struct net_bridge_port *p)
610 {
611         return rcu_dereference_rtnl(p->vlan_info);
612 }
613 
614 /* Since bridge now depends on 8021Q module, but the time bridge sees the
615  * skb, the vlan tag will always be present if the frame was tagged.
616  */
617 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
618 {
619         int err = 0;
620 
621         if (vlan_tx_tag_present(skb))
622                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
623         else {
624                 *vid = 0;
625                 err = -EINVAL;
626         }
627 
628         return err;
629 }
630 
631 static inline u16 br_get_pvid(const struct net_port_vlans *v)
632 {
633         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
634          * vid wasn't set
635          */
636         smp_rmb();
637         return v->pvid ?: VLAN_N_VID;
638 }
639 
640 #else
641 static inline bool br_allowed_ingress(struct net_bridge *br,
642                                       struct net_port_vlans *v,
643                                       struct sk_buff *skb,
644                                       u16 *vid)
645 {
646         return true;
647 }
648 
649 static inline bool br_allowed_egress(struct net_bridge *br,
650                                      const struct net_port_vlans *v,
651                                      const struct sk_buff *skb)
652 {
653         return true;
654 }
655 
656 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
657                                              const struct net_port_vlans *v,
658                                              struct sk_buff *skb)
659 {
660         return skb;
661 }
662 
663 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
664 {
665         return -EOPNOTSUPP;
666 }
667 
668 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
669 {
670         return -EOPNOTSUPP;
671 }
672 
673 static inline void br_vlan_flush(struct net_bridge *br)
674 {
675 }
676 
677 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
678 {
679         return -EOPNOTSUPP;
680 }
681 
682 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
683 {
684         return -EOPNOTSUPP;
685 }
686 
687 static inline void nbp_vlan_flush(struct net_bridge_port *port)
688 {
689 }
690 
691 static inline struct net_port_vlans *br_get_vlan_info(
692                                                 const struct net_bridge *br)
693 {
694         return NULL;
695 }
696 static inline struct net_port_vlans *nbp_get_vlan_info(
697                                                 const struct net_bridge_port *p)
698 {
699         return NULL;
700 }
701 
702 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
703 {
704         return false;
705 }
706 
707 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
708 {
709         return 0;
710 }
711 static inline u16 br_get_pvid(const struct net_port_vlans *v)
712 {
713         return VLAN_N_VID;      /* Returns invalid vid */
714 }
715 #endif
716 
717 /* br_netfilter.c */
718 #ifdef CONFIG_BRIDGE_NETFILTER
719 int br_netfilter_init(void);
720 void br_netfilter_fini(void);
721 void br_netfilter_rtable_init(struct net_bridge *);
722 #else
723 #define br_netfilter_init()     (0)
724 #define br_netfilter_fini()     do { } while(0)
725 #define br_netfilter_rtable_init(x)
726 #endif
727 
728 /* br_stp.c */
729 void br_log_state(const struct net_bridge_port *p);
730 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
731 void br_init_port(struct net_bridge_port *p);
732 void br_become_designated_port(struct net_bridge_port *p);
733 
734 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
735 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
736 int br_set_hello_time(struct net_bridge *br, unsigned long x);
737 int br_set_max_age(struct net_bridge *br, unsigned long x);
738 
739 
740 /* br_stp_if.c */
741 void br_stp_enable_bridge(struct net_bridge *br);
742 void br_stp_disable_bridge(struct net_bridge *br);
743 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
744 void br_stp_enable_port(struct net_bridge_port *p);
745 void br_stp_disable_port(struct net_bridge_port *p);
746 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
747 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
748 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
749 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
750 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
751 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
752 
753 /* br_stp_bpdu.c */
754 struct stp_proto;
755 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
756                 struct net_device *dev);
757 
758 /* br_stp_timer.c */
759 void br_stp_timer_init(struct net_bridge *br);
760 void br_stp_port_timer_init(struct net_bridge_port *p);
761 unsigned long br_timer_value(const struct timer_list *timer);
762 
763 /* br.c */
764 #if IS_ENABLED(CONFIG_ATM_LANE)
765 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
766 #endif
767 
768 /* br_netlink.c */
769 extern struct rtnl_link_ops br_link_ops;
770 int br_netlink_init(void);
771 void br_netlink_fini(void);
772 void br_ifinfo_notify(int event, struct net_bridge_port *port);
773 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
774 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
775 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
776                u32 filter_mask);
777 
778 #ifdef CONFIG_SYSFS
779 /* br_sysfs_if.c */
780 extern const struct sysfs_ops brport_sysfs_ops;
781 int br_sysfs_addif(struct net_bridge_port *p);
782 int br_sysfs_renameif(struct net_bridge_port *p);
783 
784 /* br_sysfs_br.c */
785 int br_sysfs_addbr(struct net_device *dev);
786 void br_sysfs_delbr(struct net_device *dev);
787 
788 #else
789 
790 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
791 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
792 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
793 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
794 #endif /* CONFIG_SYSFS */
795 
796 #endif
797 

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