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1da177e4 LT |
1 | /* |
2 | * Linux ethernet bridge | |
3 | * | |
4 | * Authors: | |
5 | * Lennert Buytenhek <buytenh@gnu.org> | |
6 | * | |
1da177e4 LT |
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> | |
1da177e4 | 17 | #include <linux/if_bridge.h> |
4adf0af6 | 18 | #include <net/route.h> |
1da177e4 LT |
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 | ||
9cde0708 SH |
28 | #define BR_VERSION "2.3" |
29 | ||
30 | /* Path to usermode spanning tree program */ | |
31 | #define BR_STP_PROG "/sbin/bridge-stp" | |
8cbb512e | 32 | |
1da177e4 LT |
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; | |
1da177e4 LT |
54 | unsigned long ageing_timer; |
55 | mac_addr addr; | |
56 | unsigned char is_local; | |
57 | unsigned char is_static; | |
58 | }; | |
59 | ||
eb1d1641 HX |
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 | ||
1da177e4 LT |
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; | |
3982d3d2 FA |
119 | |
120 | unsigned long flags; | |
121 | #define BR_HAIRPIN_MODE 0x00000001 | |
eb1d1641 HX |
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 | |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct net_bridge | |
134 | { | |
135 | spinlock_t lock; | |
136 | struct list_head port_list; | |
137 | struct net_device *dev; | |
1da177e4 LT |
138 | spinlock_t hash_lock; |
139 | struct hlist_head hash[BR_HASH_SIZE]; | |
edb5e46f | 140 | unsigned long feature_mask; |
4adf0af6 SW |
141 | #ifdef CONFIG_BRIDGE_NETFILTER |
142 | struct rtable fake_rtable; | |
143 | #endif | |
92c0574f SH |
144 | unsigned long flags; |
145 | #define BR_SET_MAC_ADDR 0x00000001 | |
1da177e4 LT |
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 | ||
fda93d92 | 159 | u8 group_addr[ETH_ALEN]; |
1da177e4 | 160 | u16 root_port; |
9cde0708 SH |
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 | ||
1da177e4 LT |
168 | unsigned char topology_change; |
169 | unsigned char topology_change_detected; | |
170 | ||
eb1d1641 HX |
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 | ||
1da177e4 LT |
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; | |
43b98c4a | 204 | struct kobject *ifobj; |
1da177e4 LT |
205 | }; |
206 | ||
68b7c895 HX |
207 | struct br_input_skb_cb { |
208 | struct net_device *brdev; | |
eb1d1641 HX |
209 | int igmp; |
210 | int mrouters_only; | |
68b7c895 HX |
211 | }; |
212 | ||
213 | #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) | |
214 | ||
1da177e4 | 215 | extern struct notifier_block br_device_notifier; |
fda93d92 | 216 | extern const u8 br_group_address[ETH_ALEN]; |
1da177e4 LT |
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 | ||
1da177e4 LT |
224 | /* br_device.c */ |
225 | extern void br_dev_setup(struct net_device *dev); | |
6fef4c0c SH |
226 | extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, |
227 | struct net_device *dev); | |
1da177e4 LT |
228 | |
229 | /* br_fdb.c */ | |
87a596e0 | 230 | extern int br_fdb_init(void); |
1da177e4 | 231 | extern void br_fdb_fini(void); |
9cf63747 | 232 | extern void br_fdb_flush(struct net_bridge *br); |
1da177e4 LT |
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, | |
1a620698 | 237 | const struct net_bridge_port *p, int do_all); |
1da177e4 LT |
238 | extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
239 | const unsigned char *addr); | |
da678292 | 240 | extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); |
9d6f229f | 241 | extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, |
1da177e4 LT |
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); | |
e081e1e3 | 257 | extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); |
b33084be HX |
258 | extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, |
259 | struct sk_buff *skb2); | |
1da177e4 LT |
260 | |
261 | /* br_if.c */ | |
269def7c | 262 | extern void br_port_carrier_check(struct net_bridge_port *p); |
4aa678ba AD |
263 | extern int br_add_bridge(struct net *net, const char *name); |
264 | extern int br_del_bridge(struct net *net, const char *name); | |
712d6954 | 265 | extern void br_net_exit(struct net *net); |
1da177e4 LT |
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); | |
81d35307 | 271 | extern void br_features_recompute(struct net_bridge *br); |
1da177e4 LT |
272 | |
273 | /* br_input.c */ | |
274 | extern int br_handle_frame_finish(struct sk_buff *skb); | |
6229e362 SH |
275 | extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, |
276 | struct sk_buff *skb); | |
1da177e4 LT |
277 | |
278 | /* br_ioctl.c */ | |
279 | extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
881d966b | 280 | extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); |
1da177e4 | 281 | |
eb1d1641 HX |
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); | |
5cb5e947 HX |
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); | |
eb1d1641 HX |
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 | } | |
5cb5e947 HX |
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 | } | |
eb1d1641 HX |
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 | ||
1da177e4 | 361 | /* br_netfilter.c */ |
c0909713 | 362 | #ifdef CONFIG_BRIDGE_NETFILTER |
1da177e4 LT |
363 | extern int br_netfilter_init(void); |
364 | extern void br_netfilter_fini(void); | |
4adf0af6 | 365 | extern void br_netfilter_rtable_init(struct net_bridge *); |
c0909713 SH |
366 | #else |
367 | #define br_netfilter_init() (0) | |
368 | #define br_netfilter_fini() do { } while(0) | |
4adf0af6 | 369 | #define br_netfilter_rtable_init(x) |
c0909713 | 370 | #endif |
1da177e4 LT |
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, | |
9d6f229f | 375 | u16 port_no); |
1da177e4 LT |
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); | |
9cde0708 | 382 | extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); |
1da177e4 LT |
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); | |
4505a3ef | 386 | extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); |
1da177e4 LT |
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 */ | |
7c85fbf0 PM |
396 | struct stp_proto; |
397 | extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, | |
398 | struct net_device *dev); | |
1da177e4 LT |
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 */ | |
da678292 MM |
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 | |
1da177e4 | 409 | |
11dc1f36 | 410 | /* br_netlink.c */ |
32fe21c0 | 411 | extern int br_netlink_init(void); |
11dc1f36 SH |
412 | extern void br_netlink_fini(void); |
413 | extern void br_ifinfo_notify(int event, struct net_bridge_port *port); | |
414 | ||
1da177e4 LT |
415 | #ifdef CONFIG_SYSFS |
416 | /* br_sysfs_if.c */ | |
bab1deea | 417 | extern struct sysfs_ops brport_sysfs_ops; |
1da177e4 | 418 | extern int br_sysfs_addif(struct net_bridge_port *p); |
1da177e4 LT |
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) | |
1da177e4 LT |
427 | #define br_sysfs_addbr(dev) (0) |
428 | #define br_sysfs_delbr(dev) do { } while(0) | |
429 | #endif /* CONFIG_SYSFS */ | |
430 | ||
431 | #endif |