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bridge: Add const to dummy br_netpoll_send_skb
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bridge / br_private.h
blob07cf57b373fec863754bb27b8f62b20eb928be3d
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 <net/route.h>
20
21 #define BR_HASH_BITS 8
22 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
23
24 #define BR_HOLD_TIME (1*HZ)
25
26 #define BR_PORT_BITS 10
27 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
28
29 #define BR_VERSION "2.3"
30
31 /* Path to usermode spanning tree program */
32 #define BR_STP_PROG "/sbin/bridge-stp"
33
34 typedef struct bridge_id bridge_id;
35 typedef struct mac_addr mac_addr;
36 typedef __u16 port_id;
37
38 struct bridge_id
39 {
40 unsigned char prio[2];
41 unsigned char addr[6];
42 };
43
44 struct mac_addr
45 {
46 unsigned char addr[6];
47 };
48
49 struct br_ip
50 {
51 union {
52 __be32 ip4;
53 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
54 struct in6_addr ip6;
55 #endif
56 } u;
57 __be16 proto;
58 };
59
60 struct net_bridge_fdb_entry
61 {
62 struct hlist_node hlist;
63 struct net_bridge_port *dst;
64
65 struct rcu_head rcu;
66 unsigned long ageing_timer;
67 mac_addr addr;
68 unsigned char is_local;
69 unsigned char is_static;
70 };
71
72 struct net_bridge_port_group {
73 struct net_bridge_port *port;
74 struct net_bridge_port_group *next;
75 struct hlist_node mglist;
76 struct rcu_head rcu;
77 struct timer_list timer;
78 struct timer_list query_timer;
79 struct br_ip addr;
80 u32 queries_sent;
81 };
82
83 struct net_bridge_mdb_entry
84 {
85 struct hlist_node hlist[2];
86 struct hlist_node mglist;
87 struct net_bridge *br;
88 struct net_bridge_port_group *ports;
89 struct rcu_head rcu;
90 struct timer_list timer;
91 struct timer_list query_timer;
92 struct br_ip addr;
93 u32 queries_sent;
94 };
95
96 struct net_bridge_mdb_htable
97 {
98 struct hlist_head *mhash;
99 struct rcu_head rcu;
100 struct net_bridge_mdb_htable *old;
101 u32 size;
102 u32 max;
103 u32 secret;
104 u32 ver;
105 };
106
107 struct net_bridge_port
108 {
109 struct net_bridge *br;
110 struct net_device *dev;
111 struct list_head list;
112
113 /* STP */
114 u8 priority;
115 u8 state;
116 u16 port_no;
117 unsigned char topology_change_ack;
118 unsigned char config_pending;
119 port_id port_id;
120 port_id designated_port;
121 bridge_id designated_root;
122 bridge_id designated_bridge;
123 u32 path_cost;
124 u32 designated_cost;
125
126 struct timer_list forward_delay_timer;
127 struct timer_list hold_timer;
128 struct timer_list message_age_timer;
129 struct kobject kobj;
130 struct rcu_head rcu;
131
132 unsigned long flags;
133 #define BR_HAIRPIN_MODE 0x00000001
134
135 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
136 u32 multicast_startup_queries_sent;
137 unsigned char multicast_router;
138 struct timer_list multicast_router_timer;
139 struct timer_list multicast_query_timer;
140 struct hlist_head mglist;
141 struct hlist_node rlist;
142 #endif
143
144 #ifdef CONFIG_SYSFS
145 char sysfs_name[IFNAMSIZ];
146 #endif
147
148 #ifdef CONFIG_NET_POLL_CONTROLLER
149 struct netpoll *np;
150 #endif
151 };
152
153 #define br_port_get_rcu(dev) \
154 ((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
155 #define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
156 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
157
158 struct br_cpu_netstats {
159 unsigned long rx_packets;
160 unsigned long rx_bytes;
161 unsigned long tx_packets;
162 unsigned long tx_bytes;
163 };
164
165 struct net_bridge
166 {
167 spinlock_t lock;
168 struct list_head port_list;
169 struct net_device *dev;
170
171 struct br_cpu_netstats __percpu *stats;
172 spinlock_t hash_lock;
173 struct hlist_head hash[BR_HASH_SIZE];
174 unsigned long feature_mask;
175 #ifdef CONFIG_BRIDGE_NETFILTER
176 struct rtable fake_rtable;
177 #endif
178 unsigned long flags;
179 #define BR_SET_MAC_ADDR 0x00000001
180
181 /* STP */
182 bridge_id designated_root;
183 bridge_id bridge_id;
184 u32 root_path_cost;
185 unsigned long max_age;
186 unsigned long hello_time;
187 unsigned long forward_delay;
188 unsigned long bridge_max_age;
189 unsigned long ageing_time;
190 unsigned long bridge_hello_time;
191 unsigned long bridge_forward_delay;
192
193 u8 group_addr[ETH_ALEN];
194 u16 root_port;
195
196 enum {
197 BR_NO_STP, /* no spanning tree */
198 BR_KERNEL_STP, /* old STP in kernel */
199 BR_USER_STP, /* new RSTP in userspace */
200 } stp_enabled;
201
202 unsigned char topology_change;
203 unsigned char topology_change_detected;
204
205 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
206 unsigned char multicast_router;
207
208 u8 multicast_disabled:1;
209
210 u32 hash_elasticity;
211 u32 hash_max;
212
213 u32 multicast_last_member_count;
214 u32 multicast_startup_queries_sent;
215 u32 multicast_startup_query_count;
216
217 unsigned long multicast_last_member_interval;
218 unsigned long multicast_membership_interval;
219 unsigned long multicast_querier_interval;
220 unsigned long multicast_query_interval;
221 unsigned long multicast_query_response_interval;
222 unsigned long multicast_startup_query_interval;
223
224 spinlock_t multicast_lock;
225 struct net_bridge_mdb_htable *mdb;
226 struct hlist_head router_list;
227 struct hlist_head mglist;
228
229 struct timer_list multicast_router_timer;
230 struct timer_list multicast_querier_timer;
231 struct timer_list multicast_query_timer;
232 #endif
233
234 struct timer_list hello_timer;
235 struct timer_list tcn_timer;
236 struct timer_list topology_change_timer;
237 struct timer_list gc_timer;
238 struct kobject *ifobj;
239 };
240
241 struct br_input_skb_cb {
242 struct net_device *brdev;
243 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
244 int igmp;
245 int mrouters_only;
246 #endif
247 };
248
249 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
250
251 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
252 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
253 #else
254 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
255 #endif
256
257 #define br_printk(level, br, format, args...) \
258 printk(level "%s: " format, (br)->dev->name, ##args)
259
260 #define br_err(__br, format, args...) \
261 br_printk(KERN_ERR, __br, format, ##args)
262 #define br_warn(__br, format, args...) \
263 br_printk(KERN_WARNING, __br, format, ##args)
264 #define br_notice(__br, format, args...) \
265 br_printk(KERN_NOTICE, __br, format, ##args)
266 #define br_info(__br, format, args...) \
267 br_printk(KERN_INFO, __br, format, ##args)
268
269 #define br_debug(br, format, args...) \
270 pr_debug("%s: " format, (br)->dev->name, ##args)
271
272 extern struct notifier_block br_device_notifier;
273 extern const u8 br_group_address[ETH_ALEN];
274
275 /* called under bridge lock */
276 static inline int br_is_root_bridge(const struct net_bridge *br)
277 {
278 return !memcmp(&br->bridge_id, &br->designated_root, 8);
279 }
280
281 /* br_device.c */
282 extern void br_dev_setup(struct net_device *dev);
283 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
284 struct net_device *dev);
285 #ifdef CONFIG_NET_POLL_CONTROLLER
286 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
287 {
288 return br->dev->npinfo;
289 }
290
291 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
292 struct sk_buff *skb)
293 {
294 struct netpoll *np = p->np;
295
296 if (np)
297 netpoll_send_skb(np, skb);
298 }
299
300 extern int br_netpoll_enable(struct net_bridge_port *p);
301 extern void br_netpoll_disable(struct net_bridge_port *p);
302 #else
303 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
304 {
305 return NULL;
306 }
307
308 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
309 struct sk_buff *skb)
310 {
311 }
312
313 static inline int br_netpoll_enable(struct net_bridge_port *p)
314 {
315 return 0;
316 }
317
318 static inline void br_netpoll_disable(struct net_bridge_port *p)
319 {
320 }
321 #endif
322
323 /* br_fdb.c */
324 extern int br_fdb_init(void);
325 extern void br_fdb_fini(void);
326 extern void br_fdb_flush(struct net_bridge *br);
327 extern void br_fdb_changeaddr(struct net_bridge_port *p,
328 const unsigned char *newaddr);
329 extern void br_fdb_cleanup(unsigned long arg);
330 extern void br_fdb_delete_by_port(struct net_bridge *br,
331 const struct net_bridge_port *p, int do_all);
332 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
333 const unsigned char *addr);
334 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
335 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
336 unsigned long count, unsigned long off);
337 extern int br_fdb_insert(struct net_bridge *br,
338 struct net_bridge_port *source,
339 const unsigned char *addr);
340 extern void br_fdb_update(struct net_bridge *br,
341 struct net_bridge_port *source,
342 const unsigned char *addr);
343
344 /* br_forward.c */
345 extern void br_deliver(const struct net_bridge_port *to,
346 struct sk_buff *skb);
347 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
348 extern void br_forward(const struct net_bridge_port *to,
349 struct sk_buff *skb, struct sk_buff *skb0);
350 extern int br_forward_finish(struct sk_buff *skb);
351 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
352 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
353 struct sk_buff *skb2);
354
355 /* br_if.c */
356 extern void br_port_carrier_check(struct net_bridge_port *p);
357 extern int br_add_bridge(struct net *net, const char *name);
358 extern int br_del_bridge(struct net *net, const char *name);
359 extern void br_net_exit(struct net *net);
360 extern int br_add_if(struct net_bridge *br,
361 struct net_device *dev);
362 extern int br_del_if(struct net_bridge *br,
363 struct net_device *dev);
364 extern int br_min_mtu(const struct net_bridge *br);
365 extern void br_features_recompute(struct net_bridge *br);
366
367 /* br_input.c */
368 extern int br_handle_frame_finish(struct sk_buff *skb);
369 extern struct sk_buff *br_handle_frame(struct sk_buff *skb);
370
371 /* br_ioctl.c */
372 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
373 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
374
375 /* br_multicast.c */
376 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
377 extern int br_multicast_rcv(struct net_bridge *br,
378 struct net_bridge_port *port,
379 struct sk_buff *skb);
380 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
381 struct sk_buff *skb);
382 extern void br_multicast_add_port(struct net_bridge_port *port);
383 extern void br_multicast_del_port(struct net_bridge_port *port);
384 extern void br_multicast_enable_port(struct net_bridge_port *port);
385 extern void br_multicast_disable_port(struct net_bridge_port *port);
386 extern void br_multicast_init(struct net_bridge *br);
387 extern void br_multicast_open(struct net_bridge *br);
388 extern void br_multicast_stop(struct net_bridge *br);
389 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
390 struct sk_buff *skb);
391 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
392 struct sk_buff *skb, struct sk_buff *skb2);
393 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
394 extern int br_multicast_set_port_router(struct net_bridge_port *p,
395 unsigned long val);
396 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
397 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
398
399 static inline bool br_multicast_is_router(struct net_bridge *br)
400 {
401 return br->multicast_router == 2 ||
402 (br->multicast_router == 1 &&
403 timer_pending(&br->multicast_router_timer));
404 }
405 #else
406 static inline int br_multicast_rcv(struct net_bridge *br,
407 struct net_bridge_port *port,
408 struct sk_buff *skb)
409 {
410 return 0;
411 }
412
413 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
414 struct sk_buff *skb)
415 {
416 return NULL;
417 }
418
419 static inline void br_multicast_add_port(struct net_bridge_port *port)
420 {
421 }
422
423 static inline void br_multicast_del_port(struct net_bridge_port *port)
424 {
425 }
426
427 static inline void br_multicast_enable_port(struct net_bridge_port *port)
428 {
429 }
430
431 static inline void br_multicast_disable_port(struct net_bridge_port *port)
432 {
433 }
434
435 static inline void br_multicast_init(struct net_bridge *br)
436 {
437 }
438
439 static inline void br_multicast_open(struct net_bridge *br)
440 {
441 }
442
443 static inline void br_multicast_stop(struct net_bridge *br)
444 {
445 }
446
447 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
448 struct sk_buff *skb)
449 {
450 }
451
452 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
453 struct sk_buff *skb,
454 struct sk_buff *skb2)
455 {
456 }
457 static inline bool br_multicast_is_router(struct net_bridge *br)
458 {
459 return 0;
460 }
461 #endif
462
463 /* br_netfilter.c */
464 #ifdef CONFIG_BRIDGE_NETFILTER
465 extern int br_netfilter_init(void);
466 extern void br_netfilter_fini(void);
467 extern void br_netfilter_rtable_init(struct net_bridge *);
468 #else
469 #define br_netfilter_init() (0)
470 #define br_netfilter_fini() do { } while(0)
471 #define br_netfilter_rtable_init(x)
472 #endif
473
474 /* br_stp.c */
475 extern void br_log_state(const struct net_bridge_port *p);
476 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
477 u16 port_no);
478 extern void br_init_port(struct net_bridge_port *p);
479 extern void br_become_designated_port(struct net_bridge_port *p);
480
481 /* br_stp_if.c */
482 extern void br_stp_enable_bridge(struct net_bridge *br);
483 extern void br_stp_disable_bridge(struct net_bridge *br);
484 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
485 extern void br_stp_enable_port(struct net_bridge_port *p);
486 extern void br_stp_disable_port(struct net_bridge_port *p);
487 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
488 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
489 extern void br_stp_set_bridge_priority(struct net_bridge *br,
490 u16 newprio);
491 extern void br_stp_set_port_priority(struct net_bridge_port *p,
492 u8 newprio);
493 extern void br_stp_set_path_cost(struct net_bridge_port *p,
494 u32 path_cost);
495 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
496
497 /* br_stp_bpdu.c */
498 struct stp_proto;
499 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
500 struct net_device *dev);
501
502 /* br_stp_timer.c */
503 extern void br_stp_timer_init(struct net_bridge *br);
504 extern void br_stp_port_timer_init(struct net_bridge_port *p);
505 extern unsigned long br_timer_value(const struct timer_list *timer);
506
507 /* br.c */
508 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
509 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
510 #endif
511
512 /* br_netlink.c */
513 extern int br_netlink_init(void);
514 extern void br_netlink_fini(void);
515 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
516
517 #ifdef CONFIG_SYSFS
518 /* br_sysfs_if.c */
519 extern const struct sysfs_ops brport_sysfs_ops;
520 extern int br_sysfs_addif(struct net_bridge_port *p);
521 extern int br_sysfs_renameif(struct net_bridge_port *p);
522
523 /* br_sysfs_br.c */
524 extern int br_sysfs_addbr(struct net_device *dev);
525 extern void br_sysfs_delbr(struct net_device *dev);
526
527 #else
528
529 #define br_sysfs_addif(p) (0)
530 #define br_sysfs_renameif(p) (0)
531 #define br_sysfs_addbr(dev) (0)
532 #define br_sysfs_delbr(dev) do { } while(0)
533 #endif /* CONFIG_SYSFS */
534
535 #endif
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