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

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