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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/if_bridge.h>
Simon Wunderlich4adf0af2008-07-30 16:27:55 -070018#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
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
Stephen Hemminger9cde0702007-03-21 14:22:44 -070028#define BR_VERSION "2.3"
29
30/* Path to usermode spanning tree program */
31#define BR_STP_PROG "/sbin/bridge-stp"
Stephen Hemminger8cbb5122005-12-21 19:01:30 -080032
Linus Torvalds1da177e2005-04-16 15:20:36 -070033typedef struct bridge_id bridge_id;
34typedef struct mac_addr mac_addr;
35typedef __u16 port_id;
36
37struct bridge_id
38{
39 unsigned char prio[2];
40 unsigned char addr[6];
41};
42
43struct mac_addr
44{
45 unsigned char addr[6];
46};
47
48struct net_bridge_fdb_entry
49{
50 struct hlist_node hlist;
51 struct net_bridge_port *dst;
52
53 struct rcu_head rcu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 unsigned long ageing_timer;
55 mac_addr addr;
56 unsigned char is_local;
57 unsigned char is_static;
58};
59
Herbert Xueb1d1642010-02-27 19:41:45 +000060struct 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
71struct 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
84struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070095struct 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;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000119
120 unsigned long flags;
121#define BR_HAIRPIN_MODE 0x00000001
Herbert Xueb1d1642010-02-27 19:41:45 +0000122
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131};
132
133struct net_bridge
134{
135 spinlock_t lock;
136 struct list_head port_list;
137 struct net_device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 spinlock_t hash_lock;
139 struct hlist_head hash[BR_HASH_SIZE];
Stephen Hemmingeredb5e462005-12-21 19:00:58 -0800140 unsigned long feature_mask;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700141#ifdef CONFIG_BRIDGE_NETFILTER
142 struct rtable fake_rtable;
143#endif
Stephen Hemminger92c05742008-06-17 16:10:06 -0700144 unsigned long flags;
145#define BR_SET_MAC_ADDR 0x00000001
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
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
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800159 u8 group_addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 u16 root_port;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700161
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 unsigned char topology_change;
169 unsigned char topology_change_detected;
170
Herbert Xueb1d1642010-02-27 19:41:45 +0000171#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 struct timer_list hello_timer;
201 struct timer_list tcn_timer;
202 struct timer_list topology_change_timer;
203 struct timer_list gc_timer;
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400204 struct kobject *ifobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205};
206
Herbert Xu68b7c892010-02-27 19:41:40 +0000207struct br_input_skb_cb {
208 struct net_device *brdev;
Herbert Xueb1d1642010-02-27 19:41:45 +0000209 int igmp;
210 int mrouters_only;
Herbert Xu68b7c892010-02-27 19:41:40 +0000211};
212
213#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215extern struct notifier_block br_device_notifier;
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800216extern const u8 br_group_address[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218/* called under bridge lock */
219static inline int br_is_root_bridge(const struct net_bridge *br)
220{
221 return !memcmp(&br->bridge_id, &br->designated_root, 8);
222}
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224/* br_device.c */
225extern void br_dev_setup(struct net_device *dev);
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000226extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
227 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229/* br_fdb.c */
Akinobu Mita87a596e2007-04-07 18:57:07 +0900230extern int br_fdb_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231extern void br_fdb_fini(void);
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700232extern void br_fdb_flush(struct net_bridge *br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233extern void br_fdb_changeaddr(struct net_bridge_port *p,
234 const unsigned char *newaddr);
235extern void br_fdb_cleanup(unsigned long arg);
236extern void br_fdb_delete_by_port(struct net_bridge *br,
Stephen Hemminger1a620692006-10-12 14:45:38 -0700237 const struct net_bridge_port *p, int do_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
239 const unsigned char *addr);
Michał Mirosławda678292009-06-05 05:35:28 +0000240extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900241extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 unsigned long count, unsigned long off);
243extern int br_fdb_insert(struct net_bridge *br,
244 struct net_bridge_port *source,
245 const unsigned char *addr);
246extern void br_fdb_update(struct net_bridge *br,
247 struct net_bridge_port *source,
248 const unsigned char *addr);
249
250/* br_forward.c */
251extern void br_deliver(const struct net_bridge_port *to,
252 struct sk_buff *skb);
253extern int br_dev_queue_push_xmit(struct sk_buff *skb);
254extern void br_forward(const struct net_bridge_port *to,
255 struct sk_buff *skb);
256extern int br_forward_finish(struct sk_buff *skb);
Herbert Xue081e1e2007-09-16 16:20:48 -0700257extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
Herbert Xub33084b2010-02-27 19:41:41 +0000258extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
259 struct sk_buff *skb2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261/* br_if.c */
Stephen Hemminger269def72007-02-22 01:10:18 -0800262extern void br_port_carrier_check(struct net_bridge_port *p);
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700263extern int br_add_bridge(struct net *net, const char *name);
264extern int br_del_bridge(struct net *net, const char *name);
Alexey Dobriyan712d6952008-09-08 16:20:18 -0700265extern void br_net_exit(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266extern int br_add_if(struct net_bridge *br,
267 struct net_device *dev);
268extern int br_del_if(struct net_bridge *br,
269 struct net_device *dev);
270extern int br_min_mtu(const struct net_bridge *br);
Stephen Hemminger81d35302005-05-29 14:15:17 -0700271extern void br_features_recompute(struct net_bridge *br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273/* br_input.c */
274extern int br_handle_frame_finish(struct sk_buff *skb);
Stephen Hemminger6229e362007-03-21 13:38:47 -0700275extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
276 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278/* br_ioctl.c */
279extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700280extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Herbert Xueb1d1642010-02-27 19:41:45 +0000282/* br_multicast.c */
283#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
284extern int br_multicast_rcv(struct net_bridge *br,
285 struct net_bridge_port *port,
286 struct sk_buff *skb);
287extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
288 struct sk_buff *skb);
289extern void br_multicast_add_port(struct net_bridge_port *port);
290extern void br_multicast_del_port(struct net_bridge_port *port);
291extern void br_multicast_enable_port(struct net_bridge_port *port);
292extern void br_multicast_disable_port(struct net_bridge_port *port);
293extern void br_multicast_init(struct net_bridge *br);
294extern void br_multicast_open(struct net_bridge *br);
295extern void br_multicast_stop(struct net_bridge *br);
Herbert Xu5cb5e942010-02-27 19:41:46 +0000296extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
297 struct sk_buff *skb);
298extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
299 struct sk_buff *skb, struct sk_buff *skb2);
Herbert Xu0909e112010-02-27 19:41:49 +0000300extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
301extern int br_multicast_set_port_router(struct net_bridge_port *p,
302 unsigned long val);
Herbert Xu561f11032010-02-27 19:41:50 +0000303extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
Herbert Xub1951672010-02-27 19:41:51 +0000304extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000305
306static inline bool br_multicast_is_router(struct net_bridge *br)
307{
308 return br->multicast_router == 2 ||
309 (br->multicast_router == 1 &&
310 timer_pending(&br->multicast_router_timer));
311}
Herbert Xueb1d1642010-02-27 19:41:45 +0000312#else
313static inline int br_multicast_rcv(struct net_bridge *br,
314 struct net_bridge_port *port,
315 struct sk_buff *skb)
316{
317 return 0;
318}
319
320static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
321 struct sk_buff *skb)
322{
323 return NULL;
324}
325
326static inline void br_multicast_add_port(struct net_bridge_port *port)
327{
328}
329
330static inline void br_multicast_del_port(struct net_bridge_port *port)
331{
332}
333
334static inline void br_multicast_enable_port(struct net_bridge_port *port)
335{
336}
337
338static inline void br_multicast_disable_port(struct net_bridge_port *port)
339{
340}
341
342static inline void br_multicast_init(struct net_bridge *br)
343{
344}
345
346static inline void br_multicast_open(struct net_bridge *br)
347{
348}
349
350static inline void br_multicast_stop(struct net_bridge *br)
351{
352}
Herbert Xu5cb5e942010-02-27 19:41:46 +0000353
354static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
355 struct sk_buff *skb)
356{
357}
358
359static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
360 struct sk_buff *skb,
361 struct sk_buff *skb2)
362{
363}
Herbert Xueb1d1642010-02-27 19:41:45 +0000364static inline bool br_multicast_is_router(struct net_bridge *br)
365{
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000366 return 0;
Herbert Xueb1d1642010-02-27 19:41:45 +0000367}
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000368#endif
Herbert Xueb1d1642010-02-27 19:41:45 +0000369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370/* br_netfilter.c */
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700371#ifdef CONFIG_BRIDGE_NETFILTER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372extern int br_netfilter_init(void);
373extern void br_netfilter_fini(void);
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700374extern void br_netfilter_rtable_init(struct net_bridge *);
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700375#else
376#define br_netfilter_init() (0)
377#define br_netfilter_fini() do { } while(0)
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700378#define br_netfilter_rtable_init(x)
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700379#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381/* br_stp.c */
382extern void br_log_state(const struct net_bridge_port *p);
383extern struct net_bridge_port *br_get_port(struct net_bridge *br,
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900384 u16 port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385extern void br_init_port(struct net_bridge_port *p);
386extern void br_become_designated_port(struct net_bridge_port *p);
387
388/* br_stp_if.c */
389extern void br_stp_enable_bridge(struct net_bridge *br);
390extern void br_stp_disable_bridge(struct net_bridge *br);
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700391extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392extern void br_stp_enable_port(struct net_bridge_port *p);
393extern void br_stp_disable_port(struct net_bridge_port *p);
394extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
Stephen Hemminger4505a3e2005-12-21 18:51:49 -0800395extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396extern void br_stp_set_bridge_priority(struct net_bridge *br,
397 u16 newprio);
398extern void br_stp_set_port_priority(struct net_bridge_port *p,
399 u8 newprio);
400extern void br_stp_set_path_cost(struct net_bridge_port *p,
401 u32 path_cost);
402extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
403
404/* br_stp_bpdu.c */
Patrick McHardy7c85fbf2008-07-05 21:25:56 -0700405struct stp_proto;
406extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
407 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409/* br_stp_timer.c */
410extern void br_stp_timer_init(struct net_bridge *br);
411extern void br_stp_port_timer_init(struct net_bridge_port *p);
412extern unsigned long br_timer_value(const struct timer_list *timer);
413
414/* br.c */
Michał Mirosławda678292009-06-05 05:35:28 +0000415#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
416extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
417#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700419/* br_netlink.c */
Thomas Graf32fe21c2007-03-22 11:59:03 -0700420extern int br_netlink_init(void);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700421extern void br_netlink_fini(void);
422extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424#ifdef CONFIG_SYSFS
425/* br_sysfs_if.c */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100426extern const struct sysfs_ops brport_sysfs_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427extern int br_sysfs_addif(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429/* br_sysfs_br.c */
430extern int br_sysfs_addbr(struct net_device *dev);
431extern void br_sysfs_delbr(struct net_device *dev);
432
433#else
434
435#define br_sysfs_addif(p) (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436#define br_sysfs_addbr(dev) (0)
437#define br_sysfs_delbr(dev) do { } while(0)
438#endif /* CONFIG_SYSFS */
439
440#endif