ipv4: flush route cache after change accept_local
[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         unsigned long                   designated_age;
128
129         struct timer_list               forward_delay_timer;
130         struct timer_list               hold_timer;
131         struct timer_list               message_age_timer;
132         struct kobject                  kobj;
133         struct rcu_head                 rcu;
134
135         unsigned long                   flags;
136 #define BR_HAIRPIN_MODE         0x00000001
137
138 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
139         u32                             multicast_startup_queries_sent;
140         unsigned char                   multicast_router;
141         struct timer_list               multicast_router_timer;
142         struct timer_list               multicast_query_timer;
143         struct hlist_head               mglist;
144         struct hlist_node               rlist;
145 #endif
146
147 #ifdef CONFIG_SYSFS
148         char                            sysfs_name[IFNAMSIZ];
149 #endif
150
151 #ifdef CONFIG_NET_POLL_CONTROLLER
152         struct netpoll                  *np;
153 #endif
154 };
155
156 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
157
158 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
159 {
160         struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
161         return br_port_exists(dev) ? port : NULL;
162 }
163
164 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
165 {
166         return br_port_exists(dev) ?
167                 rtnl_dereference(dev->rx_handler_data) : NULL;
168 }
169
170 struct br_cpu_netstats {
171         u64                     rx_packets;
172         u64                     rx_bytes;
173         u64                     tx_packets;
174         u64                     tx_bytes;
175         struct u64_stats_sync   syncp;
176 };
177
178 struct net_bridge
179 {
180         spinlock_t                      lock;
181         struct list_head                port_list;
182         struct net_device               *dev;
183
184         struct br_cpu_netstats __percpu *stats;
185         spinlock_t                      hash_lock;
186         struct hlist_head               hash[BR_HASH_SIZE];
187 #ifdef CONFIG_BRIDGE_NETFILTER
188         struct rtable                   fake_rtable;
189         bool                            nf_call_iptables;
190         bool                            nf_call_ip6tables;
191         bool                            nf_call_arptables;
192 #endif
193         unsigned long                   flags;
194 #define BR_SET_MAC_ADDR         0x00000001
195
196         /* STP */
197         bridge_id                       designated_root;
198         bridge_id                       bridge_id;
199         u32                             root_path_cost;
200         unsigned long                   max_age;
201         unsigned long                   hello_time;
202         unsigned long                   forward_delay;
203         unsigned long                   bridge_max_age;
204         unsigned long                   ageing_time;
205         unsigned long                   bridge_hello_time;
206         unsigned long                   bridge_forward_delay;
207
208         u8                              group_addr[ETH_ALEN];
209         u16                             root_port;
210
211         enum {
212                 BR_NO_STP,              /* no spanning tree */
213                 BR_KERNEL_STP,          /* old STP in kernel */
214                 BR_USER_STP,            /* new RSTP in userspace */
215         } stp_enabled;
216
217         unsigned char                   topology_change;
218         unsigned char                   topology_change_detected;
219
220 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
221         unsigned char                   multicast_router;
222
223         u8                              multicast_disabled:1;
224
225         u32                             hash_elasticity;
226         u32                             hash_max;
227
228         u32                             multicast_last_member_count;
229         u32                             multicast_startup_queries_sent;
230         u32                             multicast_startup_query_count;
231
232         unsigned long                   multicast_last_member_interval;
233         unsigned long                   multicast_membership_interval;
234         unsigned long                   multicast_querier_interval;
235         unsigned long                   multicast_query_interval;
236         unsigned long                   multicast_query_response_interval;
237         unsigned long                   multicast_startup_query_interval;
238
239         spinlock_t                      multicast_lock;
240         struct net_bridge_mdb_htable __rcu *mdb;
241         struct hlist_head               router_list;
242
243         struct timer_list               multicast_router_timer;
244         struct timer_list               multicast_querier_timer;
245         struct timer_list               multicast_query_timer;
246 #endif
247
248         struct timer_list               hello_timer;
249         struct timer_list               tcn_timer;
250         struct timer_list               topology_change_timer;
251         struct timer_list               gc_timer;
252         struct kobject                  *ifobj;
253 };
254
255 struct br_input_skb_cb {
256         struct net_device *brdev;
257 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258         int igmp;
259         int mrouters_only;
260 #endif
261 };
262
263 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
264
265 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
266 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
267 #else
268 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
269 #endif
270
271 #define br_printk(level, br, format, args...)   \
272         printk(level "%s: " format, (br)->dev->name, ##args)
273
274 #define br_err(__br, format, args...)                   \
275         br_printk(KERN_ERR, __br, format, ##args)
276 #define br_warn(__br, format, args...)                  \
277         br_printk(KERN_WARNING, __br, format, ##args)
278 #define br_notice(__br, format, args...)                \
279         br_printk(KERN_NOTICE, __br, format, ##args)
280 #define br_info(__br, format, args...)                  \
281         br_printk(KERN_INFO, __br, format, ##args)
282
283 #define br_debug(br, format, args...)                   \
284         pr_debug("%s: " format,  (br)->dev->name, ##args)
285
286 extern struct notifier_block br_device_notifier;
287 extern const u8 br_group_address[ETH_ALEN];
288
289 /* called under bridge lock */
290 static inline int br_is_root_bridge(const struct net_bridge *br)
291 {
292         return !memcmp(&br->bridge_id, &br->designated_root, 8);
293 }
294
295 /* br_device.c */
296 extern void br_dev_setup(struct net_device *dev);
297 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
298 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
299                                struct net_device *dev);
300 #ifdef CONFIG_NET_POLL_CONTROLLER
301 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
302 {
303         return br->dev->npinfo;
304 }
305
306 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
307                                        struct sk_buff *skb)
308 {
309         struct netpoll *np = p->np;
310
311         if (np)
312                 netpoll_send_skb(np, skb);
313 }
314
315 extern int br_netpoll_enable(struct net_bridge_port *p);
316 extern void br_netpoll_disable(struct net_bridge_port *p);
317 #else
318 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
319 {
320         return NULL;
321 }
322
323 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
324                                        struct sk_buff *skb)
325 {
326 }
327
328 static inline int br_netpoll_enable(struct net_bridge_port *p)
329 {
330         return 0;
331 }
332
333 static inline void br_netpoll_disable(struct net_bridge_port *p)
334 {
335 }
336 #endif
337
338 /* br_fdb.c */
339 extern int br_fdb_init(void);
340 extern void br_fdb_fini(void);
341 extern void br_fdb_flush(struct net_bridge *br);
342 extern void br_fdb_changeaddr(struct net_bridge_port *p,
343                               const unsigned char *newaddr);
344 extern void br_fdb_cleanup(unsigned long arg);
345 extern void br_fdb_delete_by_port(struct net_bridge *br,
346                                   const struct net_bridge_port *p, int do_all);
347 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
348                                                  const unsigned char *addr);
349 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
350 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
351                           unsigned long count, unsigned long off);
352 extern int br_fdb_insert(struct net_bridge *br,
353                          struct net_bridge_port *source,
354                          const unsigned char *addr);
355 extern void br_fdb_update(struct net_bridge *br,
356                           struct net_bridge_port *source,
357                           const unsigned char *addr);
358 extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
359 extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
360 extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
361
362 /* br_forward.c */
363 extern void br_deliver(const struct net_bridge_port *to,
364                 struct sk_buff *skb);
365 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
366 extern void br_forward(const struct net_bridge_port *to,
367                 struct sk_buff *skb, struct sk_buff *skb0);
368 extern int br_forward_finish(struct sk_buff *skb);
369 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
370 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
371                              struct sk_buff *skb2);
372
373 /* br_if.c */
374 extern void br_port_carrier_check(struct net_bridge_port *p);
375 extern int br_add_bridge(struct net *net, const char *name);
376 extern int br_del_bridge(struct net *net, const char *name);
377 extern void br_net_exit(struct net *net);
378 extern int br_add_if(struct net_bridge *br,
379               struct net_device *dev);
380 extern int br_del_if(struct net_bridge *br,
381               struct net_device *dev);
382 extern int br_min_mtu(const struct net_bridge *br);
383 extern u32 br_features_recompute(struct net_bridge *br, u32 features);
384
385 /* br_input.c */
386 extern int br_handle_frame_finish(struct sk_buff *skb);
387 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
388
389 /* br_ioctl.c */
390 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
391 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
392
393 /* br_multicast.c */
394 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
395 extern int br_multicast_rcv(struct net_bridge *br,
396                             struct net_bridge_port *port,
397                             struct sk_buff *skb);
398 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
399                                                struct sk_buff *skb);
400 extern void br_multicast_add_port(struct net_bridge_port *port);
401 extern void br_multicast_del_port(struct net_bridge_port *port);
402 extern void br_multicast_enable_port(struct net_bridge_port *port);
403 extern void br_multicast_disable_port(struct net_bridge_port *port);
404 extern void br_multicast_init(struct net_bridge *br);
405 extern void br_multicast_open(struct net_bridge *br);
406 extern void br_multicast_stop(struct net_bridge *br);
407 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
408                                  struct sk_buff *skb);
409 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
410                                  struct sk_buff *skb, struct sk_buff *skb2);
411 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
412 extern int br_multicast_set_port_router(struct net_bridge_port *p,
413                                         unsigned long val);
414 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
415 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
416
417 static inline bool br_multicast_is_router(struct net_bridge *br)
418 {
419         return br->multicast_router == 2 ||
420                (br->multicast_router == 1 &&
421                 timer_pending(&br->multicast_router_timer));
422 }
423 #else
424 static inline int br_multicast_rcv(struct net_bridge *br,
425                                    struct net_bridge_port *port,
426                                    struct sk_buff *skb)
427 {
428         return 0;
429 }
430
431 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
432                                                       struct sk_buff *skb)
433 {
434         return NULL;
435 }
436
437 static inline void br_multicast_add_port(struct net_bridge_port *port)
438 {
439 }
440
441 static inline void br_multicast_del_port(struct net_bridge_port *port)
442 {
443 }
444
445 static inline void br_multicast_enable_port(struct net_bridge_port *port)
446 {
447 }
448
449 static inline void br_multicast_disable_port(struct net_bridge_port *port)
450 {
451 }
452
453 static inline void br_multicast_init(struct net_bridge *br)
454 {
455 }
456
457 static inline void br_multicast_open(struct net_bridge *br)
458 {
459 }
460
461 static inline void br_multicast_stop(struct net_bridge *br)
462 {
463 }
464
465 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
466                                         struct sk_buff *skb)
467 {
468 }
469
470 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
471                                         struct sk_buff *skb,
472                                         struct sk_buff *skb2)
473 {
474 }
475 static inline bool br_multicast_is_router(struct net_bridge *br)
476 {
477         return 0;
478 }
479 #endif
480
481 /* br_netfilter.c */
482 #ifdef CONFIG_BRIDGE_NETFILTER
483 extern int br_netfilter_init(void);
484 extern void br_netfilter_fini(void);
485 extern void br_netfilter_rtable_init(struct net_bridge *);
486 #else
487 #define br_netfilter_init()     (0)
488 #define br_netfilter_fini()     do { } while(0)
489 #define br_netfilter_rtable_init(x)
490 #endif
491
492 /* br_stp.c */
493 extern void br_log_state(const struct net_bridge_port *p);
494 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
495                                            u16 port_no);
496 extern void br_init_port(struct net_bridge_port *p);
497 extern void br_become_designated_port(struct net_bridge_port *p);
498
499 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
500 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
501 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
502
503
504 /* br_stp_if.c */
505 extern void br_stp_enable_bridge(struct net_bridge *br);
506 extern void br_stp_disable_bridge(struct net_bridge *br);
507 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
508 extern void br_stp_enable_port(struct net_bridge_port *p);
509 extern void br_stp_disable_port(struct net_bridge_port *p);
510 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
511 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
512 extern void br_stp_set_bridge_priority(struct net_bridge *br,
513                                        u16 newprio);
514 extern int br_stp_set_port_priority(struct net_bridge_port *p,
515                                     unsigned long newprio);
516 extern int br_stp_set_path_cost(struct net_bridge_port *p,
517                                 unsigned long path_cost);
518 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
519
520 /* br_stp_bpdu.c */
521 struct stp_proto;
522 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
523                        struct net_device *dev);
524
525 /* br_stp_timer.c */
526 extern void br_stp_timer_init(struct net_bridge *br);
527 extern void br_stp_port_timer_init(struct net_bridge_port *p);
528 extern unsigned long br_timer_value(const struct timer_list *timer);
529
530 /* br.c */
531 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
532 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
533 #endif
534
535 /* br_netlink.c */
536 extern int br_netlink_init(void);
537 extern void br_netlink_fini(void);
538 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
539
540 #ifdef CONFIG_SYSFS
541 /* br_sysfs_if.c */
542 extern const struct sysfs_ops brport_sysfs_ops;
543 extern int br_sysfs_addif(struct net_bridge_port *p);
544 extern int br_sysfs_renameif(struct net_bridge_port *p);
545
546 /* br_sysfs_br.c */
547 extern int br_sysfs_addbr(struct net_device *dev);
548 extern void br_sysfs_delbr(struct net_device *dev);
549
550 #else
551
552 #define br_sysfs_addif(p)       (0)
553 #define br_sysfs_renameif(p)    (0)
554 #define br_sysfs_addbr(dev)     (0)
555 #define br_sysfs_delbr(dev)     do { } while(0)
556 #endif /* CONFIG_SYSFS */
557
558 #endif