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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 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
210 | int igmp; |
211 | int mrouters_only; |
212 | #endif |
213 | }; |
214 | |
215 | #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) |
216 | |
217 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
218 | # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) |
219 | #else |
220 | # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) |
221 | #endif |
222 | |
223 | extern struct notifier_block br_device_notifier; |
224 | extern const u8 br_group_address[ETH_ALEN]; |
225 | |
226 | /* called under bridge lock */ |
227 | static inline int br_is_root_bridge(const struct net_bridge *br) |
228 | { |
229 | return !memcmp(&br->bridge_id, &br->designated_root, 8); |
230 | } |
231 | |
232 | /* br_device.c */ |
233 | extern void br_dev_setup(struct net_device *dev); |
234 | extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, |
235 | struct net_device *dev); |
236 | |
237 | /* br_fdb.c */ |
238 | extern int br_fdb_init(void); |
239 | extern void br_fdb_fini(void); |
240 | extern void br_fdb_flush(struct net_bridge *br); |
241 | extern void br_fdb_changeaddr(struct net_bridge_port *p, |
242 | const unsigned char *newaddr); |
243 | extern void br_fdb_cleanup(unsigned long arg); |
244 | extern void br_fdb_delete_by_port(struct net_bridge *br, |
245 | const struct net_bridge_port *p, int do_all); |
246 | extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
247 | const unsigned char *addr); |
248 | extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); |
249 | extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, |
250 | unsigned long count, unsigned long off); |
251 | extern int br_fdb_insert(struct net_bridge *br, |
252 | struct net_bridge_port *source, |
253 | const unsigned char *addr); |
254 | extern void br_fdb_update(struct net_bridge *br, |
255 | struct net_bridge_port *source, |
256 | const unsigned char *addr); |
257 | |
258 | /* br_forward.c */ |
259 | extern void br_deliver(const struct net_bridge_port *to, |
260 | struct sk_buff *skb); |
261 | extern int br_dev_queue_push_xmit(struct sk_buff *skb); |
262 | extern void br_forward(const struct net_bridge_port *to, |
263 | struct sk_buff *skb, struct sk_buff *skb0); |
264 | extern int br_forward_finish(struct sk_buff *skb); |
265 | extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); |
266 | extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, |
267 | struct sk_buff *skb2); |
268 | |
269 | /* br_if.c */ |
270 | extern void br_port_carrier_check(struct net_bridge_port *p); |
271 | extern int br_add_bridge(struct net *net, const char *name); |
272 | extern int br_del_bridge(struct net *net, const char *name); |
273 | extern void br_net_exit(struct net *net); |
274 | extern int br_add_if(struct net_bridge *br, |
275 | struct net_device *dev); |
276 | extern int br_del_if(struct net_bridge *br, |
277 | struct net_device *dev); |
278 | extern int br_min_mtu(const struct net_bridge *br); |
279 | extern void br_features_recompute(struct net_bridge *br); |
280 | |
281 | /* br_input.c */ |
282 | extern int br_handle_frame_finish(struct sk_buff *skb); |
283 | extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, |
284 | struct sk_buff *skb); |
285 | |
286 | /* br_ioctl.c */ |
287 | extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
288 | extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); |
289 | |
290 | /* br_multicast.c */ |
291 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
292 | extern int br_multicast_rcv(struct net_bridge *br, |
293 | struct net_bridge_port *port, |
294 | struct sk_buff *skb); |
295 | extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
296 | struct sk_buff *skb); |
297 | extern void br_multicast_add_port(struct net_bridge_port *port); |
298 | extern void br_multicast_del_port(struct net_bridge_port *port); |
299 | extern void br_multicast_enable_port(struct net_bridge_port *port); |
300 | extern void br_multicast_disable_port(struct net_bridge_port *port); |
301 | extern void br_multicast_init(struct net_bridge *br); |
302 | extern void br_multicast_open(struct net_bridge *br); |
303 | extern void br_multicast_stop(struct net_bridge *br); |
304 | extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, |
305 | struct sk_buff *skb); |
306 | extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
307 | struct sk_buff *skb, struct sk_buff *skb2); |
308 | extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); |
309 | extern int br_multicast_set_port_router(struct net_bridge_port *p, |
310 | unsigned long val); |
311 | extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); |
312 | extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); |
313 | |
314 | static inline bool br_multicast_is_router(struct net_bridge *br) |
315 | { |
316 | return br->multicast_router == 2 || |
317 | (br->multicast_router == 1 && |
318 | timer_pending(&br->multicast_router_timer)); |
319 | } |
320 | #else |
321 | static inline int br_multicast_rcv(struct net_bridge *br, |
322 | struct net_bridge_port *port, |
323 | struct sk_buff *skb) |
324 | { |
325 | return 0; |
326 | } |
327 | |
328 | static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, |
329 | struct sk_buff *skb) |
330 | { |
331 | return NULL; |
332 | } |
333 | |
334 | static inline void br_multicast_add_port(struct net_bridge_port *port) |
335 | { |
336 | } |
337 | |
338 | static inline void br_multicast_del_port(struct net_bridge_port *port) |
339 | { |
340 | } |
341 | |
342 | static inline void br_multicast_enable_port(struct net_bridge_port *port) |
343 | { |
344 | } |
345 | |
346 | static inline void br_multicast_disable_port(struct net_bridge_port *port) |
347 | { |
348 | } |
349 | |
350 | static inline void br_multicast_init(struct net_bridge *br) |
351 | { |
352 | } |
353 | |
354 | static inline void br_multicast_open(struct net_bridge *br) |
355 | { |
356 | } |
357 | |
358 | static inline void br_multicast_stop(struct net_bridge *br) |
359 | { |
360 | } |
361 | |
362 | static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, |
363 | struct sk_buff *skb) |
364 | { |
365 | } |
366 | |
367 | static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, |
368 | struct sk_buff *skb, |
369 | struct sk_buff *skb2) |
370 | { |
371 | } |
372 | static inline bool br_multicast_is_router(struct net_bridge *br) |
373 | { |
374 | return 0; |
375 | } |
376 | #endif |
377 | |
378 | /* br_netfilter.c */ |
379 | #ifdef CONFIG_BRIDGE_NETFILTER |
380 | extern int br_netfilter_init(void); |
381 | extern void br_netfilter_fini(void); |
382 | extern void br_netfilter_rtable_init(struct net_bridge *); |
383 | #else |
384 | #define br_netfilter_init() (0) |
385 | #define br_netfilter_fini() do { } while(0) |
386 | #define br_netfilter_rtable_init(x) |
387 | #endif |
388 | |
389 | /* br_stp.c */ |
390 | extern void br_log_state(const struct net_bridge_port *p); |
391 | extern struct net_bridge_port *br_get_port(struct net_bridge *br, |
392 | u16 port_no); |
393 | extern void br_init_port(struct net_bridge_port *p); |
394 | extern void br_become_designated_port(struct net_bridge_port *p); |
395 | |
396 | /* br_stp_if.c */ |
397 | extern void br_stp_enable_bridge(struct net_bridge *br); |
398 | extern void br_stp_disable_bridge(struct net_bridge *br); |
399 | extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); |
400 | extern void br_stp_enable_port(struct net_bridge_port *p); |
401 | extern void br_stp_disable_port(struct net_bridge_port *p); |
402 | extern void br_stp_recalculate_bridge_id(struct net_bridge *br); |
403 | extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); |
404 | extern void br_stp_set_bridge_priority(struct net_bridge *br, |
405 | u16 newprio); |
406 | extern void br_stp_set_port_priority(struct net_bridge_port *p, |
407 | u8 newprio); |
408 | extern void br_stp_set_path_cost(struct net_bridge_port *p, |
409 | u32 path_cost); |
410 | extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); |
411 | |
412 | /* br_stp_bpdu.c */ |
413 | struct stp_proto; |
414 | extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, |
415 | struct net_device *dev); |
416 | |
417 | /* br_stp_timer.c */ |
418 | extern void br_stp_timer_init(struct net_bridge *br); |
419 | extern void br_stp_port_timer_init(struct net_bridge_port *p); |
420 | extern unsigned long br_timer_value(const struct timer_list *timer); |
421 | |
422 | /* br.c */ |
423 | #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) |
424 | extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); |
425 | #endif |
426 | |
427 | /* br_netlink.c */ |
428 | extern int br_netlink_init(void); |
429 | extern void br_netlink_fini(void); |
430 | extern void br_ifinfo_notify(int event, struct net_bridge_port *port); |
431 | |
432 | #ifdef CONFIG_SYSFS |
433 | /* br_sysfs_if.c */ |
434 | extern const struct sysfs_ops brport_sysfs_ops; |
435 | extern int br_sysfs_addif(struct net_bridge_port *p); |
436 | |
437 | /* br_sysfs_br.c */ |
438 | extern int br_sysfs_addbr(struct net_device *dev); |
439 | extern void br_sysfs_delbr(struct net_device *dev); |
440 | |
441 | #else |
442 | |
443 | #define br_sysfs_addif(p) (0) |
444 | #define br_sysfs_addbr(dev) (0) |
445 | #define br_sysfs_delbr(dev) do { } while(0) |
446 | #endif /* CONFIG_SYSFS */ |
447 | |
448 | #endif |
449 |
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