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