Merge tag 'for-linus-20140225' of git://git.infradead.org/linux-mtd
[platform/adaptation/renesas_rcar/renesas_kernel.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         __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         unsigned char                   added_by_user;
108         __u16                           vlan_id;
109 };
110
111 struct net_bridge_port_group {
112         struct net_bridge_port          *port;
113         struct net_bridge_port_group __rcu *next;
114         struct hlist_node               mglist;
115         struct rcu_head                 rcu;
116         struct timer_list               timer;
117         struct br_ip                    addr;
118         unsigned char                   state;
119 };
120
121 struct net_bridge_mdb_entry
122 {
123         struct hlist_node               hlist[2];
124         struct net_bridge               *br;
125         struct net_bridge_port_group __rcu *ports;
126         struct rcu_head                 rcu;
127         struct timer_list               timer;
128         struct br_ip                    addr;
129         bool                            mglist;
130 };
131
132 struct net_bridge_mdb_htable
133 {
134         struct hlist_head               *mhash;
135         struct rcu_head                 rcu;
136         struct net_bridge_mdb_htable    *old;
137         u32                             size;
138         u32                             max;
139         u32                             secret;
140         u32                             ver;
141 };
142
143 struct net_bridge_port
144 {
145         struct net_bridge               *br;
146         struct net_device               *dev;
147         struct list_head                list;
148
149         /* STP */
150         u8                              priority;
151         u8                              state;
152         u16                             port_no;
153         unsigned char                   topology_change_ack;
154         unsigned char                   config_pending;
155         port_id                         port_id;
156         port_id                         designated_port;
157         bridge_id                       designated_root;
158         bridge_id                       designated_bridge;
159         u32                             path_cost;
160         u32                             designated_cost;
161         unsigned long                   designated_age;
162
163         struct timer_list               forward_delay_timer;
164         struct timer_list               hold_timer;
165         struct timer_list               message_age_timer;
166         struct kobject                  kobj;
167         struct rcu_head                 rcu;
168
169         unsigned long                   flags;
170 #define BR_HAIRPIN_MODE         0x00000001
171 #define BR_BPDU_GUARD           0x00000002
172 #define BR_ROOT_BLOCK           0x00000004
173 #define BR_MULTICAST_FAST_LEAVE 0x00000008
174 #define BR_ADMIN_COST           0x00000010
175 #define BR_LEARNING             0x00000020
176 #define BR_FLOOD                0x00000040
177
178 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
179         struct bridge_mcast_query       ip4_query;
180 #if IS_ENABLED(CONFIG_IPV6)
181         struct bridge_mcast_query       ip6_query;
182 #endif /* IS_ENABLED(CONFIG_IPV6) */
183         unsigned char                   multicast_router;
184         struct timer_list               multicast_router_timer;
185         struct hlist_head               mglist;
186         struct hlist_node               rlist;
187 #endif
188
189 #ifdef CONFIG_SYSFS
190         char                            sysfs_name[IFNAMSIZ];
191 #endif
192
193 #ifdef CONFIG_NET_POLL_CONTROLLER
194         struct netpoll                  *np;
195 #endif
196 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
197         struct net_port_vlans __rcu     *vlan_info;
198 #endif
199 };
200
201 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
202
203 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
204 {
205         return rcu_dereference(dev->rx_handler_data);
206 }
207
208 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
209 {
210         return br_port_exists(dev) ?
211                 rtnl_dereference(dev->rx_handler_data) : NULL;
212 }
213
214 struct net_bridge
215 {
216         spinlock_t                      lock;
217         struct list_head                port_list;
218         struct net_device               *dev;
219
220         struct pcpu_sw_netstats         __percpu *stats;
221         spinlock_t                      hash_lock;
222         struct hlist_head               hash[BR_HASH_SIZE];
223 #ifdef CONFIG_BRIDGE_NETFILTER
224         struct rtable                   fake_rtable;
225         bool                            nf_call_iptables;
226         bool                            nf_call_ip6tables;
227         bool                            nf_call_arptables;
228 #endif
229         u16                             group_fwd_mask;
230
231         /* STP */
232         bridge_id                       designated_root;
233         bridge_id                       bridge_id;
234         u32                             root_path_cost;
235         unsigned long                   max_age;
236         unsigned long                   hello_time;
237         unsigned long                   forward_delay;
238         unsigned long                   bridge_max_age;
239         unsigned long                   ageing_time;
240         unsigned long                   bridge_hello_time;
241         unsigned long                   bridge_forward_delay;
242
243         u8                              group_addr[ETH_ALEN];
244         u16                             root_port;
245
246         enum {
247                 BR_NO_STP,              /* no spanning tree */
248                 BR_KERNEL_STP,          /* old STP in kernel */
249                 BR_USER_STP,            /* new RSTP in userspace */
250         } stp_enabled;
251
252         unsigned char                   topology_change;
253         unsigned char                   topology_change_detected;
254
255 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
256         unsigned char                   multicast_router;
257
258         u8                              multicast_disabled:1;
259         u8                              multicast_querier:1;
260         u8                              multicast_query_use_ifaddr:1;
261
262         u32                             hash_elasticity;
263         u32                             hash_max;
264
265         u32                             multicast_last_member_count;
266         u32                             multicast_startup_query_count;
267
268         unsigned long                   multicast_last_member_interval;
269         unsigned long                   multicast_membership_interval;
270         unsigned long                   multicast_querier_interval;
271         unsigned long                   multicast_query_interval;
272         unsigned long                   multicast_query_response_interval;
273         unsigned long                   multicast_startup_query_interval;
274
275         spinlock_t                      multicast_lock;
276         struct net_bridge_mdb_htable __rcu *mdb;
277         struct hlist_head               router_list;
278
279         struct timer_list               multicast_router_timer;
280         struct bridge_mcast_querier     ip4_querier;
281         struct bridge_mcast_query       ip4_query;
282 #if IS_ENABLED(CONFIG_IPV6)
283         struct bridge_mcast_querier     ip6_querier;
284         struct bridge_mcast_query       ip6_query;
285 #endif /* IS_ENABLED(CONFIG_IPV6) */
286 #endif
287
288         struct timer_list               hello_timer;
289         struct timer_list               tcn_timer;
290         struct timer_list               topology_change_timer;
291         struct timer_list               gc_timer;
292         struct kobject                  *ifobj;
293 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
294         u8                              vlan_enabled;
295         struct net_port_vlans __rcu     *vlan_info;
296 #endif
297 };
298
299 struct br_input_skb_cb {
300         struct net_device *brdev;
301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302         int igmp;
303         int mrouters_only;
304 #endif
305 };
306
307 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
308
309 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
310 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
311 #else
312 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
313 #endif
314
315 #define br_printk(level, br, format, args...)   \
316         printk(level "%s: " format, (br)->dev->name, ##args)
317
318 #define br_err(__br, format, args...)                   \
319         br_printk(KERN_ERR, __br, format, ##args)
320 #define br_warn(__br, format, args...)                  \
321         br_printk(KERN_WARNING, __br, format, ##args)
322 #define br_notice(__br, format, args...)                \
323         br_printk(KERN_NOTICE, __br, format, ##args)
324 #define br_info(__br, format, args...)                  \
325         br_printk(KERN_INFO, __br, format, ##args)
326
327 #define br_debug(br, format, args...)                   \
328         pr_debug("%s: " format,  (br)->dev->name, ##args)
329
330 extern struct notifier_block br_device_notifier;
331
332 /* called under bridge lock */
333 static inline int br_is_root_bridge(const struct net_bridge *br)
334 {
335         return !memcmp(&br->bridge_id, &br->designated_root, 8);
336 }
337
338 /* br_device.c */
339 void br_dev_setup(struct net_device *dev);
340 void br_dev_delete(struct net_device *dev, struct list_head *list);
341 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
342 #ifdef CONFIG_NET_POLL_CONTROLLER
343 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
344                                        struct sk_buff *skb)
345 {
346         struct netpoll *np = p->np;
347
348         if (np)
349                 netpoll_send_skb(np, skb);
350 }
351
352 int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
353 void br_netpoll_disable(struct net_bridge_port *p);
354 #else
355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
356                                        struct sk_buff *skb)
357 {
358 }
359
360 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
361 {
362         return 0;
363 }
364
365 static inline void br_netpoll_disable(struct net_bridge_port *p)
366 {
367 }
368 #endif
369
370 /* br_fdb.c */
371 int br_fdb_init(void);
372 void br_fdb_fini(void);
373 void br_fdb_flush(struct net_bridge *br);
374 void br_fdb_find_delete_local(struct net_bridge *br,
375                               const struct net_bridge_port *p,
376                               const unsigned char *addr, u16 vid);
377 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
378 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
379 void br_fdb_cleanup(unsigned long arg);
380 void br_fdb_delete_by_port(struct net_bridge *br,
381                            const struct net_bridge_port *p, int do_all);
382 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
383                                           const unsigned char *addr, __u16 vid);
384 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
385 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
386                    unsigned long off);
387 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
388                   const unsigned char *addr, u16 vid);
389 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
390                    const unsigned char *addr, u16 vid, bool added_by_user);
391
392 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
393                   struct net_device *dev, const unsigned char *addr);
394 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
395                const unsigned char *addr, u16 nlh_flags);
396 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
397                 struct net_device *dev, int idx);
398
399 /* br_forward.c */
400 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
401 int br_dev_queue_push_xmit(struct sk_buff *skb);
402 void br_forward(const struct net_bridge_port *to,
403                 struct sk_buff *skb, struct sk_buff *skb0);
404 int br_forward_finish(struct sk_buff *skb);
405 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
406 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
407                       struct sk_buff *skb2, bool unicast);
408
409 /* br_if.c */
410 void br_port_carrier_check(struct net_bridge_port *p);
411 int br_add_bridge(struct net *net, const char *name);
412 int br_del_bridge(struct net *net, const char *name);
413 int br_add_if(struct net_bridge *br, struct net_device *dev);
414 int br_del_if(struct net_bridge *br, struct net_device *dev);
415 int br_min_mtu(const struct net_bridge *br);
416 netdev_features_t br_features_recompute(struct net_bridge *br,
417                                         netdev_features_t features);
418
419 /* br_input.c */
420 int br_handle_frame_finish(struct sk_buff *skb);
421 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
422
423 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
424 {
425         return rcu_dereference(dev->rx_handler) == br_handle_frame;
426 }
427
428 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
429 {
430         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
431 }
432
433 /* br_ioctl.c */
434 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
435 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
436                              void __user *arg);
437
438 /* br_multicast.c */
439 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
440 extern unsigned int br_mdb_rehash_seq;
441 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
442                      struct sk_buff *skb, u16 vid);
443 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
444                                         struct sk_buff *skb, u16 vid);
445 void br_multicast_add_port(struct net_bridge_port *port);
446 void br_multicast_del_port(struct net_bridge_port *port);
447 void br_multicast_enable_port(struct net_bridge_port *port);
448 void br_multicast_disable_port(struct net_bridge_port *port);
449 void br_multicast_init(struct net_bridge *br);
450 void br_multicast_open(struct net_bridge *br);
451 void br_multicast_stop(struct net_bridge *br);
452 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
453                           struct sk_buff *skb);
454 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
455                           struct sk_buff *skb, struct sk_buff *skb2);
456 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
457 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
458 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
459 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
460 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
461 struct net_bridge_mdb_entry *
462 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
463 struct net_bridge_mdb_entry *
464 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
465                        struct br_ip *group);
466 void br_multicast_free_pg(struct rcu_head *head);
467 struct net_bridge_port_group *
468 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
469                             struct net_bridge_port_group __rcu *next,
470                             unsigned char state);
471 void br_mdb_init(void);
472 void br_mdb_uninit(void);
473 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
474                    struct br_ip *group, int type);
475
476 #define mlock_dereference(X, br) \
477         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
478
479 static inline bool br_multicast_is_router(struct net_bridge *br)
480 {
481         return br->multicast_router == 2 ||
482                (br->multicast_router == 1 &&
483                 timer_pending(&br->multicast_router_timer));
484 }
485
486 static inline bool
487 __br_multicast_querier_exists(struct net_bridge *br,
488                               struct bridge_mcast_querier *querier)
489 {
490         return time_is_before_jiffies(querier->delay_time) &&
491                (br->multicast_querier || timer_pending(&querier->timer));
492 }
493
494 static inline bool br_multicast_querier_exists(struct net_bridge *br,
495                                                struct ethhdr *eth)
496 {
497         switch (eth->h_proto) {
498         case (htons(ETH_P_IP)):
499                 return __br_multicast_querier_exists(br, &br->ip4_querier);
500 #if IS_ENABLED(CONFIG_IPV6)
501         case (htons(ETH_P_IPV6)):
502                 return __br_multicast_querier_exists(br, &br->ip6_querier);
503 #endif
504         default:
505                 return false;
506         }
507 }
508 #else
509 static inline int br_multicast_rcv(struct net_bridge *br,
510                                    struct net_bridge_port *port,
511                                    struct sk_buff *skb,
512                                    u16 vid)
513 {
514         return 0;
515 }
516
517 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
518                                                       struct sk_buff *skb, u16 vid)
519 {
520         return NULL;
521 }
522
523 static inline void br_multicast_add_port(struct net_bridge_port *port)
524 {
525 }
526
527 static inline void br_multicast_del_port(struct net_bridge_port *port)
528 {
529 }
530
531 static inline void br_multicast_enable_port(struct net_bridge_port *port)
532 {
533 }
534
535 static inline void br_multicast_disable_port(struct net_bridge_port *port)
536 {
537 }
538
539 static inline void br_multicast_init(struct net_bridge *br)
540 {
541 }
542
543 static inline void br_multicast_open(struct net_bridge *br)
544 {
545 }
546
547 static inline void br_multicast_stop(struct net_bridge *br)
548 {
549 }
550
551 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
552                                         struct sk_buff *skb)
553 {
554 }
555
556 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
557                                         struct sk_buff *skb,
558                                         struct sk_buff *skb2)
559 {
560 }
561 static inline bool br_multicast_is_router(struct net_bridge *br)
562 {
563         return 0;
564 }
565 static inline bool br_multicast_querier_exists(struct net_bridge *br,
566                                                struct ethhdr *eth)
567 {
568         return false;
569 }
570 static inline void br_mdb_init(void)
571 {
572 }
573 static inline void br_mdb_uninit(void)
574 {
575 }
576 #endif
577
578 /* br_vlan.c */
579 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
580 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
581                         struct sk_buff *skb, u16 *vid);
582 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
583                        const struct sk_buff *skb);
584 struct sk_buff *br_handle_vlan(struct net_bridge *br,
585                                const struct net_port_vlans *v,
586                                struct sk_buff *skb);
587 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
588 int br_vlan_delete(struct net_bridge *br, u16 vid);
589 void br_vlan_flush(struct net_bridge *br);
590 bool br_vlan_find(struct net_bridge *br, u16 vid);
591 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
592 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
593 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
594 void nbp_vlan_flush(struct net_bridge_port *port);
595 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
596
597 static inline struct net_port_vlans *br_get_vlan_info(
598                                                 const struct net_bridge *br)
599 {
600         return rcu_dereference_rtnl(br->vlan_info);
601 }
602
603 static inline struct net_port_vlans *nbp_get_vlan_info(
604                                                 const struct net_bridge_port *p)
605 {
606         return rcu_dereference_rtnl(p->vlan_info);
607 }
608
609 /* Since bridge now depends on 8021Q module, but the time bridge sees the
610  * skb, the vlan tag will always be present if the frame was tagged.
611  */
612 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
613 {
614         int err = 0;
615
616         if (vlan_tx_tag_present(skb))
617                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
618         else {
619                 *vid = 0;
620                 err = -EINVAL;
621         }
622
623         return err;
624 }
625
626 static inline u16 br_get_pvid(const struct net_port_vlans *v)
627 {
628         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
629          * vid wasn't set
630          */
631         smp_rmb();
632         return v->pvid ?: VLAN_N_VID;
633 }
634
635 #else
636 static inline bool br_allowed_ingress(struct net_bridge *br,
637                                       struct net_port_vlans *v,
638                                       struct sk_buff *skb,
639                                       u16 *vid)
640 {
641         return true;
642 }
643
644 static inline bool br_allowed_egress(struct net_bridge *br,
645                                      const struct net_port_vlans *v,
646                                      const struct sk_buff *skb)
647 {
648         return true;
649 }
650
651 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
652                                              const struct net_port_vlans *v,
653                                              struct sk_buff *skb)
654 {
655         return skb;
656 }
657
658 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
659 {
660         return -EOPNOTSUPP;
661 }
662
663 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
664 {
665         return -EOPNOTSUPP;
666 }
667
668 static inline void br_vlan_flush(struct net_bridge *br)
669 {
670 }
671
672 static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
673 {
674         return false;
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