tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
33typedef 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;
54 unsigned long ageing_timer;
55 mac_addr addr;
56 unsigned char is_local;
57 unsigned char is_static;
58};
59
60struct 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
95struct 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
133struct 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
207struct 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
223extern struct notifier_block br_device_notifier;
224extern const u8 br_group_address[ETH_ALEN];
225
226/* called under bridge lock */
227static 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 */
233extern void br_dev_setup(struct net_device *dev);
234extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
235 struct net_device *dev);
236
237/* br_fdb.c */
238extern int br_fdb_init(void);
239extern void br_fdb_fini(void);
240extern void br_fdb_flush(struct net_bridge *br);
241extern void br_fdb_changeaddr(struct net_bridge_port *p,
242 const unsigned char *newaddr);
243extern void br_fdb_cleanup(unsigned long arg);
244extern void br_fdb_delete_by_port(struct net_bridge *br,
245 const struct net_bridge_port *p, int do_all);
246extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
247 const unsigned char *addr);
248extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
249extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
250 unsigned long count, unsigned long off);
251extern int br_fdb_insert(struct net_bridge *br,
252 struct net_bridge_port *source,
253 const unsigned char *addr);
254extern void br_fdb_update(struct net_bridge *br,
255 struct net_bridge_port *source,
256 const unsigned char *addr);
257
258/* br_forward.c */
259extern void br_deliver(const struct net_bridge_port *to,
260 struct sk_buff *skb);
261extern int br_dev_queue_push_xmit(struct sk_buff *skb);
262extern void br_forward(const struct net_bridge_port *to,
263 struct sk_buff *skb, struct sk_buff *skb0);
264extern int br_forward_finish(struct sk_buff *skb);
265extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
266extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
267 struct sk_buff *skb2);
268
269/* br_if.c */
270extern void br_port_carrier_check(struct net_bridge_port *p);
271extern int br_add_bridge(struct net *net, const char *name);
272extern int br_del_bridge(struct net *net, const char *name);
273extern void br_net_exit(struct net *net);
274extern int br_add_if(struct net_bridge *br,
275 struct net_device *dev);
276extern int br_del_if(struct net_bridge *br,
277 struct net_device *dev);
278extern int br_min_mtu(const struct net_bridge *br);
279extern void br_features_recompute(struct net_bridge *br);
280
281/* br_input.c */
282extern int br_handle_frame_finish(struct sk_buff *skb);
283extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
284 struct sk_buff *skb);
285
286/* br_ioctl.c */
287extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
288extern 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
292extern int br_multicast_rcv(struct net_bridge *br,
293 struct net_bridge_port *port,
294 struct sk_buff *skb);
295extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
296 struct sk_buff *skb);
297extern void br_multicast_add_port(struct net_bridge_port *port);
298extern void br_multicast_del_port(struct net_bridge_port *port);
299extern void br_multicast_enable_port(struct net_bridge_port *port);
300extern void br_multicast_disable_port(struct net_bridge_port *port);
301extern void br_multicast_init(struct net_bridge *br);
302extern void br_multicast_open(struct net_bridge *br);
303extern void br_multicast_stop(struct net_bridge *br);
304extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
305 struct sk_buff *skb);
306extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
307 struct sk_buff *skb, struct sk_buff *skb2);
308extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
309extern int br_multicast_set_port_router(struct net_bridge_port *p,
310 unsigned long val);
311extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
312extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
313
314static 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
321static 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
328static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
329 struct sk_buff *skb)
330{
331 return NULL;
332}
333
334static inline void br_multicast_add_port(struct net_bridge_port *port)
335{
336}
337
338static inline void br_multicast_del_port(struct net_bridge_port *port)
339{
340}
341
342static inline void br_multicast_enable_port(struct net_bridge_port *port)
343{
344}
345
346static inline void br_multicast_disable_port(struct net_bridge_port *port)
347{
348}
349
350static inline void br_multicast_init(struct net_bridge *br)
351{
352}
353
354static inline void br_multicast_open(struct net_bridge *br)
355{
356}
357
358static inline void br_multicast_stop(struct net_bridge *br)
359{
360}
361
362static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
363 struct sk_buff *skb)
364{
365}
366
367static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
368 struct sk_buff *skb,
369 struct sk_buff *skb2)
370{
371}
372static 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
380extern int br_netfilter_init(void);
381extern void br_netfilter_fini(void);
382extern 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 */
390extern void br_log_state(const struct net_bridge_port *p);
391extern struct net_bridge_port *br_get_port(struct net_bridge *br,
392 u16 port_no);
393extern void br_init_port(struct net_bridge_port *p);
394extern void br_become_designated_port(struct net_bridge_port *p);
395
396/* br_stp_if.c */
397extern void br_stp_enable_bridge(struct net_bridge *br);
398extern void br_stp_disable_bridge(struct net_bridge *br);
399extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
400extern void br_stp_enable_port(struct net_bridge_port *p);
401extern void br_stp_disable_port(struct net_bridge_port *p);
402extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
403extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
404extern void br_stp_set_bridge_priority(struct net_bridge *br,
405 u16 newprio);
406extern void br_stp_set_port_priority(struct net_bridge_port *p,
407 u8 newprio);
408extern void br_stp_set_path_cost(struct net_bridge_port *p,
409 u32 path_cost);
410extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
411
412/* br_stp_bpdu.c */
413struct stp_proto;
414extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
415 struct net_device *dev);
416
417/* br_stp_timer.c */
418extern void br_stp_timer_init(struct net_bridge *br);
419extern void br_stp_port_timer_init(struct net_bridge_port *p);
420extern 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)
424extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
425#endif
426
427/* br_netlink.c */
428extern int br_netlink_init(void);
429extern void br_netlink_fini(void);
430extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
431
432#ifdef CONFIG_SYSFS
433/* br_sysfs_if.c */
434extern const struct sysfs_ops brport_sysfs_ops;
435extern int br_sysfs_addif(struct net_bridge_port *p);
436
437/* br_sysfs_br.c */
438extern int br_sysfs_addbr(struct net_device *dev);
439extern 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