c85943c2b23f221bba65ccca924afbf12f0bbeb9
[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 <net/route.h>
19
20 #define BR_HASH_BITS 8
21 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
22
23 #define BR_HOLD_TIME (1*HZ)
24
25 #define BR_PORT_BITS    10
26 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
27
28 #define BR_VERSION      "2.3"
29
30 /* Path to usermode spanning tree program */
31 #define BR_STP_PROG     "/sbin/bridge-stp"
32
33 typedef struct bridge_id bridge_id;
34 typedef struct mac_addr mac_addr;
35 typedef __u16 port_id;
36
37 struct bridge_id
38 {
39         unsigned char   prio[2];
40         unsigned char   addr[6];
41 };
42
43 struct mac_addr
44 {
45         unsigned char   addr[6];
46 };
47
48 struct net_bridge_fdb_entry
49 {
50         struct hlist_node               hlist;
51         struct net_bridge_port          *dst;
52
53         struct rcu_head                 rcu;
54         unsigned long                   ageing_timer;
55         mac_addr                        addr;
56         unsigned char                   is_local;
57         unsigned char                   is_static;
58 };
59
60 struct net_bridge_port_group {
61         struct net_bridge_port          *port;
62         struct net_bridge_port_group    *next;
63         struct hlist_node               mglist;
64         struct rcu_head                 rcu;
65         struct timer_list               timer;
66         struct timer_list               query_timer;
67         __be32                          addr;
68         u32                             queries_sent;
69 };
70
71 struct net_bridge_mdb_entry
72 {
73         struct hlist_node               hlist[2];
74         struct hlist_node               mglist;
75         struct net_bridge               *br;
76         struct net_bridge_port_group    *ports;
77         struct rcu_head                 rcu;
78         struct timer_list               timer;
79         struct timer_list               query_timer;
80         __be32                          addr;
81         u32                             queries_sent;
82 };
83
84 struct net_bridge_mdb_htable
85 {
86         struct hlist_head               *mhash;
87         struct rcu_head                 rcu;
88         struct net_bridge_mdb_htable    *old;
89         u32                             size;
90         u32                             max;
91         u32                             secret;
92         u32                             ver;
93 };
94
95 struct net_bridge_port
96 {
97         struct net_bridge               *br;
98         struct net_device               *dev;
99         struct list_head                list;
100
101         /* STP */
102         u8                              priority;
103         u8                              state;
104         u16                             port_no;
105         unsigned char                   topology_change_ack;
106         unsigned char                   config_pending;
107         port_id                         port_id;
108         port_id                         designated_port;
109         bridge_id                       designated_root;
110         bridge_id                       designated_bridge;
111         u32                             path_cost;
112         u32                             designated_cost;
113
114         struct timer_list               forward_delay_timer;
115         struct timer_list               hold_timer;
116         struct timer_list               message_age_timer;
117         struct kobject                  kobj;
118         struct rcu_head                 rcu;
119
120         unsigned long                   flags;
121 #define BR_HAIRPIN_MODE         0x00000001
122
123 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
124         u32                             multicast_startup_queries_sent;
125         unsigned char                   multicast_router;
126         struct timer_list               multicast_router_timer;
127         struct timer_list               multicast_query_timer;
128         struct hlist_head               mglist;
129         struct hlist_node               rlist;
130 #endif
131 };
132
133 struct net_bridge
134 {
135         spinlock_t                      lock;
136         struct list_head                port_list;
137         struct net_device               *dev;
138         spinlock_t                      hash_lock;
139         struct hlist_head               hash[BR_HASH_SIZE];
140         unsigned long                   feature_mask;
141 #ifdef CONFIG_BRIDGE_NETFILTER
142         struct rtable                   fake_rtable;
143 #endif
144         unsigned long                   flags;
145 #define BR_SET_MAC_ADDR         0x00000001
146
147         /* STP */
148         bridge_id                       designated_root;
149         bridge_id                       bridge_id;
150         u32                             root_path_cost;
151         unsigned long                   max_age;
152         unsigned long                   hello_time;
153         unsigned long                   forward_delay;
154         unsigned long                   bridge_max_age;
155         unsigned long                   ageing_time;
156         unsigned long                   bridge_hello_time;
157         unsigned long                   bridge_forward_delay;
158
159         u8                              group_addr[ETH_ALEN];
160         u16                             root_port;
161
162         enum {
163                 BR_NO_STP,              /* no spanning tree */
164                 BR_KERNEL_STP,          /* old STP in kernel */
165                 BR_USER_STP,            /* new RSTP in userspace */
166         } stp_enabled;
167
168         unsigned char                   topology_change;
169         unsigned char                   topology_change_detected;
170
171 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
172         unsigned char                   multicast_router;
173
174         u8                              multicast_disabled:1;
175
176         u32                             hash_elasticity;
177         u32                             hash_max;
178
179         u32                             multicast_last_member_count;
180         u32                             multicast_startup_queries_sent;
181         u32                             multicast_startup_query_count;
182
183         unsigned long                   multicast_last_member_interval;
184         unsigned long                   multicast_membership_interval;
185         unsigned long                   multicast_querier_interval;
186         unsigned long                   multicast_query_interval;
187         unsigned long                   multicast_query_response_interval;
188         unsigned long                   multicast_startup_query_interval;
189
190         spinlock_t                      multicast_lock;
191         struct net_bridge_mdb_htable    *mdb;
192         struct hlist_head               router_list;
193         struct hlist_head               mglist;
194
195         struct timer_list               multicast_router_timer;
196         struct timer_list               multicast_querier_timer;
197         struct timer_list               multicast_query_timer;
198 #endif
199
200         struct timer_list               hello_timer;
201         struct timer_list               tcn_timer;
202         struct timer_list               topology_change_timer;
203         struct timer_list               gc_timer;
204         struct kobject                  *ifobj;
205 };
206
207 struct br_input_skb_cb {
208         struct net_device *brdev;
209         int igmp;
210         int mrouters_only;
211 };
212
213 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
214
215 extern struct notifier_block br_device_notifier;
216 extern const u8 br_group_address[ETH_ALEN];
217
218 /* called under bridge lock */
219 static inline int br_is_root_bridge(const struct net_bridge *br)
220 {
221         return !memcmp(&br->bridge_id, &br->designated_root, 8);
222 }
223
224 /* br_device.c */
225 extern void br_dev_setup(struct net_device *dev);
226 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
227                                struct net_device *dev);
228
229 /* br_fdb.c */
230 extern int br_fdb_init(void);
231 extern void br_fdb_fini(void);
232 extern void br_fdb_flush(struct net_bridge *br);
233 extern void br_fdb_changeaddr(struct net_bridge_port *p,
234                               const unsigned char *newaddr);
235 extern void br_fdb_cleanup(unsigned long arg);
236 extern void br_fdb_delete_by_port(struct net_bridge *br,
237                                   const struct net_bridge_port *p, int do_all);
238 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
239                                                  const unsigned char *addr);
240 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
241 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
242                           unsigned long count, unsigned long off);
243 extern int br_fdb_insert(struct net_bridge *br,
244                          struct net_bridge_port *source,
245                          const unsigned char *addr);
246 extern void br_fdb_update(struct net_bridge *br,
247                           struct net_bridge_port *source,
248                           const unsigned char *addr);
249
250 /* br_forward.c */
251 extern void br_deliver(const struct net_bridge_port *to,
252                 struct sk_buff *skb);
253 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
254 extern void br_forward(const struct net_bridge_port *to,
255                 struct sk_buff *skb);
256 extern int br_forward_finish(struct sk_buff *skb);
257 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
258 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
259                              struct sk_buff *skb2);
260
261 /* br_if.c */
262 extern void br_port_carrier_check(struct net_bridge_port *p);
263 extern int br_add_bridge(struct net *net, const char *name);
264 extern int br_del_bridge(struct net *net, const char *name);
265 extern void br_net_exit(struct net *net);
266 extern int br_add_if(struct net_bridge *br,
267               struct net_device *dev);
268 extern int br_del_if(struct net_bridge *br,
269               struct net_device *dev);
270 extern int br_min_mtu(const struct net_bridge *br);
271 extern void br_features_recompute(struct net_bridge *br);
272
273 /* br_input.c */
274 extern int br_handle_frame_finish(struct sk_buff *skb);
275 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
276                                        struct sk_buff *skb);
277
278 /* br_ioctl.c */
279 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
280 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
281
282 /* br_multicast.c */
283 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
284 extern int br_multicast_rcv(struct net_bridge *br,
285                             struct net_bridge_port *port,
286                             struct sk_buff *skb);
287 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
288                                                struct sk_buff *skb);
289 extern void br_multicast_add_port(struct net_bridge_port *port);
290 extern void br_multicast_del_port(struct net_bridge_port *port);
291 extern void br_multicast_enable_port(struct net_bridge_port *port);
292 extern void br_multicast_disable_port(struct net_bridge_port *port);
293 extern void br_multicast_init(struct net_bridge *br);
294 extern void br_multicast_open(struct net_bridge *br);
295 extern void br_multicast_stop(struct net_bridge *br);
296 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
297                                  struct sk_buff *skb);
298 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
299                                  struct sk_buff *skb, struct sk_buff *skb2);
300 #else
301 static inline int br_multicast_rcv(struct net_bridge *br,
302                                    struct net_bridge_port *port,
303                                    struct sk_buff *skb)
304 {
305         return 0;
306 }
307
308 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
309                                                       struct sk_buff *skb)
310 {
311         return NULL;
312 }
313
314 static inline void br_multicast_add_port(struct net_bridge_port *port)
315 {
316 }
317
318 static inline void br_multicast_del_port(struct net_bridge_port *port)
319 {
320 }
321
322 static inline void br_multicast_enable_port(struct net_bridge_port *port)
323 {
324 }
325
326 static inline void br_multicast_disable_port(struct net_bridge_port *port)
327 {
328 }
329
330 static inline void br_multicast_init(struct net_bridge *br)
331 {
332 }
333
334 static inline void br_multicast_open(struct net_bridge *br)
335 {
336 }
337
338 static inline void br_multicast_stop(struct net_bridge *br)
339 {
340 }
341
342 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
343                                         struct sk_buff *skb)
344 {
345 }
346
347 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
348                                         struct sk_buff *skb,
349                                         struct sk_buff *skb2)
350 {
351 }
352 #endif
353
354 static inline bool br_multicast_is_router(struct net_bridge *br)
355 {
356         return br->multicast_router == 2 ||
357                (br->multicast_router == 1 &&
358                 timer_pending(&br->multicast_router_timer));
359 }
360
361 /* br_netfilter.c */
362 #ifdef CONFIG_BRIDGE_NETFILTER
363 extern int br_netfilter_init(void);
364 extern void br_netfilter_fini(void);
365 extern void br_netfilter_rtable_init(struct net_bridge *);
366 #else
367 #define br_netfilter_init()     (0)
368 #define br_netfilter_fini()     do { } while(0)
369 #define br_netfilter_rtable_init(x)
370 #endif
371
372 /* br_stp.c */
373 extern void br_log_state(const struct net_bridge_port *p);
374 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
375                                            u16 port_no);
376 extern void br_init_port(struct net_bridge_port *p);
377 extern void br_become_designated_port(struct net_bridge_port *p);
378
379 /* br_stp_if.c */
380 extern void br_stp_enable_bridge(struct net_bridge *br);
381 extern void br_stp_disable_bridge(struct net_bridge *br);
382 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
383 extern void br_stp_enable_port(struct net_bridge_port *p);
384 extern void br_stp_disable_port(struct net_bridge_port *p);
385 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
386 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
387 extern void br_stp_set_bridge_priority(struct net_bridge *br,
388                                        u16 newprio);
389 extern void br_stp_set_port_priority(struct net_bridge_port *p,
390                                      u8 newprio);
391 extern void br_stp_set_path_cost(struct net_bridge_port *p,
392                                  u32 path_cost);
393 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
394
395 /* br_stp_bpdu.c */
396 struct stp_proto;
397 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
398                        struct net_device *dev);
399
400 /* br_stp_timer.c */
401 extern void br_stp_timer_init(struct net_bridge *br);
402 extern void br_stp_port_timer_init(struct net_bridge_port *p);
403 extern unsigned long br_timer_value(const struct timer_list *timer);
404
405 /* br.c */
406 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
407 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
408 #endif
409
410 /* br_netlink.c */
411 extern int br_netlink_init(void);
412 extern void br_netlink_fini(void);
413 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
414
415 #ifdef CONFIG_SYSFS
416 /* br_sysfs_if.c */
417 extern struct sysfs_ops brport_sysfs_ops;
418 extern int br_sysfs_addif(struct net_bridge_port *p);
419
420 /* br_sysfs_br.c */
421 extern int br_sysfs_addbr(struct net_device *dev);
422 extern void br_sysfs_delbr(struct net_device *dev);
423
424 #else
425
426 #define br_sysfs_addif(p)       (0)
427 #define br_sysfs_addbr(dev)     (0)
428 #define br_sysfs_delbr(dev)     do { } while(0)
429 #endif /* CONFIG_SYSFS */
430
431 #endif