Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6.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
22 #define BR_HASH_BITS 8
23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25 #define BR_HOLD_TIME (1*HZ)
26
27 #define BR_PORT_BITS    10
28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
29
30 #define BR_VERSION      "2.3"
31
32 /* Path to usermode spanning tree program */
33 #define BR_STP_PROG     "/sbin/bridge-stp"
34
35 typedef struct bridge_id bridge_id;
36 typedef struct mac_addr mac_addr;
37 typedef __u16 port_id;
38
39 struct bridge_id
40 {
41         unsigned char   prio[2];
42         unsigned char   addr[6];
43 };
44
45 struct mac_addr
46 {
47         unsigned char   addr[6];
48 };
49
50 struct br_ip
51 {
52         union {
53                 __be32  ip4;
54 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
55                 struct in6_addr ip6;
56 #endif
57         } u;
58         __be16          proto;
59 };
60
61 struct net_bridge_fdb_entry
62 {
63         struct hlist_node               hlist;
64         struct net_bridge_port          *dst;
65
66         struct rcu_head                 rcu;
67         unsigned long                   updated;
68         unsigned long                   used;
69         mac_addr                        addr;
70         unsigned char                   is_local;
71         unsigned char                   is_static;
72 };
73
74 struct net_bridge_port_group {
75         struct net_bridge_port          *port;
76         struct net_bridge_port_group __rcu *next;
77         struct hlist_node               mglist;
78         struct rcu_head                 rcu;
79         struct timer_list               timer;
80         struct timer_list               query_timer;
81         struct br_ip                    addr;
82         u32                             queries_sent;
83 };
84
85 struct net_bridge_mdb_entry
86 {
87         struct hlist_node               hlist[2];
88         struct net_bridge               *br;
89         struct net_bridge_port_group __rcu *ports;
90         struct rcu_head                 rcu;
91         struct timer_list               timer;
92         struct timer_list               query_timer;
93         struct br_ip                    addr;
94         bool                            mglist;
95         u32                             queries_sent;
96 };
97
98 struct net_bridge_mdb_htable
99 {
100         struct hlist_head               *mhash;
101         struct rcu_head                 rcu;
102         struct net_bridge_mdb_htable    *old;
103         u32                             size;
104         u32                             max;
105         u32                             secret;
106         u32                             ver;
107 };
108
109 struct net_bridge_port
110 {
111         struct net_bridge               *br;
112         struct net_device               *dev;
113         struct list_head                list;
114
115         /* STP */
116         u8                              priority;
117         u8                              state;
118         u16                             port_no;
119         unsigned char                   topology_change_ack;
120         unsigned char                   config_pending;
121         port_id                         port_id;
122         port_id                         designated_port;
123         bridge_id                       designated_root;
124         bridge_id                       designated_bridge;
125         u32                             path_cost;
126         u32                             designated_cost;
127
128         struct timer_list               forward_delay_timer;
129         struct timer_list               hold_timer;
130         struct timer_list               message_age_timer;
131         struct kobject                  kobj;
132         struct rcu_head                 rcu;
133
134         unsigned long                   flags;
135 #define BR_HAIRPIN_MODE         0x00000001
136
137 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
138         u32                             multicast_startup_queries_sent;
139         unsigned char                   multicast_router;
140         struct timer_list               multicast_router_timer;
141         struct timer_list               multicast_query_timer;
142         struct hlist_head               mglist;
143         struct hlist_node               rlist;
144 #endif
145
146 #ifdef CONFIG_SYSFS
147         char                            sysfs_name[IFNAMSIZ];
148 #endif
149
150 #ifdef CONFIG_NET_POLL_CONTROLLER
151         struct netpoll                  *np;
152 #endif
153 };
154
155 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
156
157 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
158 {
159         struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
160         return br_port_exists(dev) ? port : NULL;
161 }
162
163 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
164 {
165         return br_port_exists(dev) ?
166                 rtnl_dereference(dev->rx_handler_data) : NULL;
167 }
168
169 struct br_cpu_netstats {
170         u64                     rx_packets;
171         u64                     rx_bytes;
172         u64                     tx_packets;
173         u64                     tx_bytes;
174         struct u64_stats_sync   syncp;
175 };
176
177 struct net_bridge
178 {
179         spinlock_t                      lock;
180         struct list_head                port_list;
181         struct net_device               *dev;
182
183         struct br_cpu_netstats __percpu *stats;
184         spinlock_t                      hash_lock;
185         struct hlist_head               hash[BR_HASH_SIZE];
186 #ifdef CONFIG_BRIDGE_NETFILTER
187         struct rtable                   fake_rtable;
188         bool                            nf_call_iptables;
189         bool                            nf_call_ip6tables;
190         bool                            nf_call_arptables;
191 #endif
192         unsigned long                   flags;
193 #define BR_SET_MAC_ADDR         0x00000001
194
195         /* STP */
196         bridge_id                       designated_root;
197         bridge_id                       bridge_id;
198         u32                             root_path_cost;
199         unsigned long                   max_age;
200         unsigned long                   hello_time;
201         unsigned long                   forward_delay;
202         unsigned long                   bridge_max_age;
203         unsigned long                   ageing_time;
204         unsigned long                   bridge_hello_time;
205         unsigned long                   bridge_forward_delay;
206
207         u8                              group_addr[ETH_ALEN];
208         u16                             root_port;
209
210         enum {
211                 BR_NO_STP,              /* no spanning tree */
212                 BR_KERNEL_STP,          /* old STP in kernel */
213                 BR_USER_STP,            /* new RSTP in userspace */
214         } stp_enabled;
215
216         unsigned char                   topology_change;
217         unsigned char                   topology_change_detected;
218
219 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
220         unsigned char                   multicast_router;
221
222         u8                              multicast_disabled:1;
223
224         u32                             hash_elasticity;
225         u32                             hash_max;
226
227         u32                             multicast_last_member_count;
228         u32                             multicast_startup_queries_sent;
229         u32                             multicast_startup_query_count;
230
231         unsigned long                   multicast_last_member_interval;
232         unsigned long                   multicast_membership_interval;
233         unsigned long                   multicast_querier_interval;
234         unsigned long                   multicast_query_interval;
235         unsigned long                   multicast_query_response_interval;
236         unsigned long                   multicast_startup_query_interval;
237
238         spinlock_t                      multicast_lock;
239         struct net_bridge_mdb_htable __rcu *mdb;
240         struct hlist_head               router_list;
241
242         struct timer_list               multicast_router_timer;
243         struct timer_list               multicast_querier_timer;
244         struct timer_list               multicast_query_timer;
245 #endif
246
247         struct timer_list               hello_timer;
248         struct timer_list               tcn_timer;
249         struct timer_list               topology_change_timer;
250         struct timer_list               gc_timer;
251         struct kobject                  *ifobj;
252 };
253
254 struct br_input_skb_cb {
255         struct net_device *brdev;
256 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
257         int igmp;
258         int mrouters_only;
259 #endif
260 };
261
262 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
263
264 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
265 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
266 #else
267 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
268 #endif
269
270 #define br_printk(level, br, format, args...)   \
271         printk(level "%s: " format, (br)->dev->name, ##args)
272
273 #define br_err(__br, format, args...)                   \
274         br_printk(KERN_ERR, __br, format, ##args)
275 #define br_warn(__br, format, args...)                  \
276         br_printk(KERN_WARNING, __br, format, ##args)
277 #define br_notice(__br, format, args...)                \
278         br_printk(KERN_NOTICE, __br, format, ##args)
279 #define br_info(__br, format, args...)                  \
280         br_printk(KERN_INFO, __br, format, ##args)
281
282 #define br_debug(br, format, args...)                   \
283         pr_debug("%s: " format,  (br)->dev->name, ##args)
284
285 extern struct notifier_block br_device_notifier;
286 extern const u8 br_group_address[ETH_ALEN];
287
288 /* called under bridge lock */
289 static inline int br_is_root_bridge(const struct net_bridge *br)
290 {
291         return !memcmp(&br->bridge_id, &br->designated_root, 8);
292 }
293
294 /* br_device.c */
295 extern void br_dev_setup(struct net_device *dev);
296 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
297                                struct net_device *dev);
298 #ifdef CONFIG_NET_POLL_CONTROLLER
299 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
300 {
301         return br->dev->npinfo;
302 }
303
304 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
305                                        struct sk_buff *skb)
306 {
307         struct netpoll *np = p->np;
308
309         if (np)
310                 netpoll_send_skb(np, skb);
311 }
312
313 extern int br_netpoll_enable(struct net_bridge_port *p);
314 extern void br_netpoll_disable(struct net_bridge_port *p);
315 #else
316 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
317 {
318         return NULL;
319 }
320
321 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
322                                        struct sk_buff *skb)
323 {
324 }
325
326 static inline int br_netpoll_enable(struct net_bridge_port *p)
327 {
328         return 0;
329 }
330
331 static inline void br_netpoll_disable(struct net_bridge_port *p)
332 {
333 }
334 #endif
335
336 /* br_fdb.c */
337 extern int br_fdb_init(void);
338 extern void br_fdb_fini(void);
339 extern void br_fdb_flush(struct net_bridge *br);
340 extern void br_fdb_changeaddr(struct net_bridge_port *p,
341                               const unsigned char *newaddr);
342 extern void br_fdb_cleanup(unsigned long arg);
343 extern void br_fdb_delete_by_port(struct net_bridge *br,
344                                   const struct net_bridge_port *p, int do_all);
345 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
346                                                  const unsigned char *addr);
347 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
348 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
349                           unsigned long count, unsigned long off);
350 extern int br_fdb_insert(struct net_bridge *br,
351                          struct net_bridge_port *source,
352                          const unsigned char *addr);
353 extern void br_fdb_update(struct net_bridge *br,
354                           struct net_bridge_port *source,
355                           const unsigned char *addr);
356 extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
357 extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
358 extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
359
360 /* br_forward.c */
361 extern void br_deliver(const struct net_bridge_port *to,
362                 struct sk_buff *skb);
363 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
364 extern void br_forward(const struct net_bridge_port *to,
365                 struct sk_buff *skb, struct sk_buff *skb0);
366 extern int br_forward_finish(struct sk_buff *skb);
367 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
368 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
369                              struct sk_buff *skb2);
370
371 /* br_if.c */
372 extern void br_port_carrier_check(struct net_bridge_port *p);
373 extern int br_add_bridge(struct net *net, const char *name);
374 extern int br_del_bridge(struct net *net, const char *name);
375 extern void br_net_exit(struct net *net);
376 extern int br_add_if(struct net_bridge *br,
377               struct net_device *dev);
378 extern int br_del_if(struct net_bridge *br,
379               struct net_device *dev);
380 extern int br_min_mtu(const struct net_bridge *br);
381 extern u32 br_features_recompute(struct net_bridge *br, u32 features);
382
383 /* br_input.c */
384 extern int br_handle_frame_finish(struct sk_buff *skb);
385 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
386
387 /* br_ioctl.c */
388 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
389 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
390
391 /* br_multicast.c */
392 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
393 extern int br_multicast_rcv(struct net_bridge *br,
394                             struct net_bridge_port *port,
395                             struct sk_buff *skb);
396 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
397                                                struct sk_buff *skb);
398 extern void br_multicast_add_port(struct net_bridge_port *port);
399 extern void br_multicast_del_port(struct net_bridge_port *port);
400 extern void br_multicast_enable_port(struct net_bridge_port *port);
401 extern void br_multicast_disable_port(struct net_bridge_port *port);
402 extern void br_multicast_init(struct net_bridge *br);
403 extern void br_multicast_open(struct net_bridge *br);
404 extern void br_multicast_stop(struct net_bridge *br);
405 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
406                                  struct sk_buff *skb);
407 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
408                                  struct sk_buff *skb, struct sk_buff *skb2);
409 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
410 extern int br_multicast_set_port_router(struct net_bridge_port *p,
411                                         unsigned long val);
412 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
413 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
414
415 static inline bool br_multicast_is_router(struct net_bridge *br)
416 {
417         return br->multicast_router == 2 ||
418                (br->multicast_router == 1 &&
419                 timer_pending(&br->multicast_router_timer));
420 }
421 #else
422 static inline int br_multicast_rcv(struct net_bridge *br,
423                                    struct net_bridge_port *port,
424                                    struct sk_buff *skb)
425 {
426         return 0;
427 }
428
429 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
430                                                       struct sk_buff *skb)
431 {
432         return NULL;
433 }
434
435 static inline void br_multicast_add_port(struct net_bridge_port *port)
436 {
437 }
438
439 static inline void br_multicast_del_port(struct net_bridge_port *port)
440 {
441 }
442
443 static inline void br_multicast_enable_port(struct net_bridge_port *port)
444 {
445 }
446
447 static inline void br_multicast_disable_port(struct net_bridge_port *port)
448 {
449 }
450
451 static inline void br_multicast_init(struct net_bridge *br)
452 {
453 }
454
455 static inline void br_multicast_open(struct net_bridge *br)
456 {
457 }
458
459 static inline void br_multicast_stop(struct net_bridge *br)
460 {
461 }
462
463 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
464                                         struct sk_buff *skb)
465 {
466 }
467
468 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
469                                         struct sk_buff *skb,
470                                         struct sk_buff *skb2)
471 {
472 }
473 static inline bool br_multicast_is_router(struct net_bridge *br)
474 {
475         return 0;
476 }
477 #endif
478
479 /* br_netfilter.c */
480 #ifdef CONFIG_BRIDGE_NETFILTER
481 extern int br_netfilter_init(void);
482 extern void br_netfilter_fini(void);
483 extern void br_netfilter_rtable_init(struct net_bridge *);
484 #else
485 #define br_netfilter_init()     (0)
486 #define br_netfilter_fini()     do { } while(0)
487 #define br_netfilter_rtable_init(x)
488 #endif
489
490 /* br_stp.c */
491 extern void br_log_state(const struct net_bridge_port *p);
492 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
493                                            u16 port_no);
494 extern void br_init_port(struct net_bridge_port *p);
495 extern void br_become_designated_port(struct net_bridge_port *p);
496
497 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
498 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
499 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
500
501
502 /* br_stp_if.c */
503 extern void br_stp_enable_bridge(struct net_bridge *br);
504 extern void br_stp_disable_bridge(struct net_bridge *br);
505 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
506 extern void br_stp_enable_port(struct net_bridge_port *p);
507 extern void br_stp_disable_port(struct net_bridge_port *p);
508 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
509 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
510 extern void br_stp_set_bridge_priority(struct net_bridge *br,
511                                        u16 newprio);
512 extern int br_stp_set_port_priority(struct net_bridge_port *p,
513                                     unsigned long newprio);
514 extern int br_stp_set_path_cost(struct net_bridge_port *p,
515                                 unsigned long path_cost);
516 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
517
518 /* br_stp_bpdu.c */
519 struct stp_proto;
520 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
521                        struct net_device *dev);
522
523 /* br_stp_timer.c */
524 extern void br_stp_timer_init(struct net_bridge *br);
525 extern void br_stp_port_timer_init(struct net_bridge_port *p);
526 extern unsigned long br_timer_value(const struct timer_list *timer);
527
528 /* br.c */
529 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
530 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
531 #endif
532
533 /* br_netlink.c */
534 extern int br_netlink_init(void);
535 extern void br_netlink_fini(void);
536 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
537
538 #ifdef CONFIG_SYSFS
539 /* br_sysfs_if.c */
540 extern const struct sysfs_ops brport_sysfs_ops;
541 extern int br_sysfs_addif(struct net_bridge_port *p);
542 extern int br_sysfs_renameif(struct net_bridge_port *p);
543
544 /* br_sysfs_br.c */
545 extern int br_sysfs_addbr(struct net_device *dev);
546 extern void br_sysfs_delbr(struct net_device *dev);
547
548 #else
549
550 #define br_sysfs_addif(p)       (0)
551 #define br_sysfs_renameif(p)    (0)
552 #define br_sysfs_addbr(dev)     (0)
553 #define br_sysfs_delbr(dev)     do { } while(0)
554 #endif /* CONFIG_SYSFS */
555
556 #endif