2 * Linux ethernet bridge
5 * Lennert Buytenhek <buytenh@gnu.org>
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.
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <net/route.h>
20 #define BR_HASH_BITS 8
21 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
23 #define BR_HOLD_TIME (1*HZ)
25 #define BR_PORT_BITS 10
26 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
28 #define BR_VERSION "2.3"
30 /* Path to usermode spanning tree program */
31 #define BR_STP_PROG "/sbin/bridge-stp"
33 typedef struct bridge_id bridge_id
;
34 typedef struct mac_addr mac_addr
;
35 typedef __u16 port_id
;
39 unsigned char prio
[2];
40 unsigned char addr
[6];
45 unsigned char addr
[6];
48 struct net_bridge_fdb_entry
50 struct hlist_node hlist
;
51 struct net_bridge_port
*dst
;
54 unsigned long ageing_timer
;
56 unsigned char is_local
;
57 unsigned char is_static
;
60 struct net_bridge_port_group
{
61 struct net_bridge_port
*port
;
62 struct net_bridge_port_group
*next
;
63 struct hlist_node mglist
;
65 struct timer_list timer
;
66 struct timer_list query_timer
;
71 struct net_bridge_mdb_entry
73 struct hlist_node hlist
[2];
74 struct hlist_node mglist
;
75 struct net_bridge
*br
;
76 struct net_bridge_port_group
*ports
;
78 struct timer_list timer
;
79 struct timer_list query_timer
;
84 struct net_bridge_mdb_htable
86 struct hlist_head
*mhash
;
88 struct net_bridge_mdb_htable
*old
;
95 struct net_bridge_port
97 struct net_bridge
*br
;
98 struct net_device
*dev
;
99 struct list_head list
;
105 unsigned char topology_change_ack
;
106 unsigned char config_pending
;
108 port_id designated_port
;
109 bridge_id designated_root
;
110 bridge_id designated_bridge
;
114 struct timer_list forward_delay_timer
;
115 struct timer_list hold_timer
;
116 struct timer_list message_age_timer
;
121 #define BR_HAIRPIN_MODE 0x00000001
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
;
133 struct br_cpu_netstats
{
134 unsigned long rx_packets
;
135 unsigned long rx_bytes
;
136 unsigned long tx_packets
;
137 unsigned long tx_bytes
;
143 struct list_head port_list
;
144 struct net_device
*dev
;
146 struct br_cpu_netstats __percpu
*stats
;
147 spinlock_t hash_lock
;
148 struct hlist_head hash
[BR_HASH_SIZE
];
149 unsigned long feature_mask
;
150 #ifdef CONFIG_BRIDGE_NETFILTER
151 struct rtable fake_rtable
;
154 #define BR_SET_MAC_ADDR 0x00000001
157 bridge_id designated_root
;
160 unsigned long max_age
;
161 unsigned long hello_time
;
162 unsigned long forward_delay
;
163 unsigned long bridge_max_age
;
164 unsigned long ageing_time
;
165 unsigned long bridge_hello_time
;
166 unsigned long bridge_forward_delay
;
168 u8 group_addr
[ETH_ALEN
];
172 BR_NO_STP
, /* no spanning tree */
173 BR_KERNEL_STP
, /* old STP in kernel */
174 BR_USER_STP
, /* new RSTP in userspace */
177 unsigned char topology_change
;
178 unsigned char topology_change_detected
;
180 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
181 unsigned char multicast_router
;
183 u8 multicast_disabled
:1;
188 u32 multicast_last_member_count
;
189 u32 multicast_startup_queries_sent
;
190 u32 multicast_startup_query_count
;
192 unsigned long multicast_last_member_interval
;
193 unsigned long multicast_membership_interval
;
194 unsigned long multicast_querier_interval
;
195 unsigned long multicast_query_interval
;
196 unsigned long multicast_query_response_interval
;
197 unsigned long multicast_startup_query_interval
;
199 spinlock_t multicast_lock
;
200 struct net_bridge_mdb_htable
*mdb
;
201 struct hlist_head router_list
;
202 struct hlist_head mglist
;
204 struct timer_list multicast_router_timer
;
205 struct timer_list multicast_querier_timer
;
206 struct timer_list multicast_query_timer
;
209 struct timer_list hello_timer
;
210 struct timer_list tcn_timer
;
211 struct timer_list topology_change_timer
;
212 struct timer_list gc_timer
;
213 struct kobject
*ifobj
;
216 struct br_input_skb_cb
{
217 struct net_device
*brdev
;
218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
224 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
226 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
227 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
229 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
232 extern struct notifier_block br_device_notifier
;
233 extern const u8 br_group_address
[ETH_ALEN
];
235 /* called under bridge lock */
236 static inline int br_is_root_bridge(const struct net_bridge
*br
)
238 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
242 extern void br_dev_setup(struct net_device
*dev
);
243 extern netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
,
244 struct net_device
*dev
);
247 extern int br_fdb_init(void);
248 extern void br_fdb_fini(void);
249 extern void br_fdb_flush(struct net_bridge
*br
);
250 extern void br_fdb_changeaddr(struct net_bridge_port
*p
,
251 const unsigned char *newaddr
);
252 extern void br_fdb_cleanup(unsigned long arg
);
253 extern void br_fdb_delete_by_port(struct net_bridge
*br
,
254 const struct net_bridge_port
*p
, int do_all
);
255 extern struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
256 const unsigned char *addr
);
257 extern int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
258 extern int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
,
259 unsigned long count
, unsigned long off
);
260 extern int br_fdb_insert(struct net_bridge
*br
,
261 struct net_bridge_port
*source
,
262 const unsigned char *addr
);
263 extern void br_fdb_update(struct net_bridge
*br
,
264 struct net_bridge_port
*source
,
265 const unsigned char *addr
);
268 extern void br_deliver(const struct net_bridge_port
*to
,
269 struct sk_buff
*skb
);
270 extern int br_dev_queue_push_xmit(struct sk_buff
*skb
);
271 extern void br_forward(const struct net_bridge_port
*to
,
272 struct sk_buff
*skb
, struct sk_buff
*skb0
);
273 extern int br_forward_finish(struct sk_buff
*skb
);
274 extern void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
);
275 extern void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
276 struct sk_buff
*skb2
);
279 extern void br_port_carrier_check(struct net_bridge_port
*p
);
280 extern int br_add_bridge(struct net
*net
, const char *name
);
281 extern int br_del_bridge(struct net
*net
, const char *name
);
282 extern void br_net_exit(struct net
*net
);
283 extern int br_add_if(struct net_bridge
*br
,
284 struct net_device
*dev
);
285 extern int br_del_if(struct net_bridge
*br
,
286 struct net_device
*dev
);
287 extern int br_min_mtu(const struct net_bridge
*br
);
288 extern void br_features_recompute(struct net_bridge
*br
);
291 extern int br_handle_frame_finish(struct sk_buff
*skb
);
292 extern struct sk_buff
*br_handle_frame(struct net_bridge_port
*p
,
293 struct sk_buff
*skb
);
296 extern int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
297 extern int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
, void __user
*arg
);
300 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
301 extern int br_multicast_rcv(struct net_bridge
*br
,
302 struct net_bridge_port
*port
,
303 struct sk_buff
*skb
);
304 extern struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
305 struct sk_buff
*skb
);
306 extern void br_multicast_add_port(struct net_bridge_port
*port
);
307 extern void br_multicast_del_port(struct net_bridge_port
*port
);
308 extern void br_multicast_enable_port(struct net_bridge_port
*port
);
309 extern void br_multicast_disable_port(struct net_bridge_port
*port
);
310 extern void br_multicast_init(struct net_bridge
*br
);
311 extern void br_multicast_open(struct net_bridge
*br
);
312 extern void br_multicast_stop(struct net_bridge
*br
);
313 extern void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
314 struct sk_buff
*skb
);
315 extern void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
316 struct sk_buff
*skb
, struct sk_buff
*skb2
);
317 extern int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
318 extern int br_multicast_set_port_router(struct net_bridge_port
*p
,
320 extern int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
321 extern int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
323 static inline bool br_multicast_is_router(struct net_bridge
*br
)
325 return br
->multicast_router
== 2 ||
326 (br
->multicast_router
== 1 &&
327 timer_pending(&br
->multicast_router_timer
));
330 static inline int br_multicast_rcv(struct net_bridge
*br
,
331 struct net_bridge_port
*port
,
337 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
343 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
347 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
351 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
355 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
359 static inline void br_multicast_init(struct net_bridge
*br
)
363 static inline void br_multicast_open(struct net_bridge
*br
)
367 static inline void br_multicast_stop(struct net_bridge
*br
)
371 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
376 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
378 struct sk_buff
*skb2
)
381 static inline bool br_multicast_is_router(struct net_bridge
*br
)
388 #ifdef CONFIG_BRIDGE_NETFILTER
389 extern int br_netfilter_init(void);
390 extern void br_netfilter_fini(void);
391 extern void br_netfilter_rtable_init(struct net_bridge
*);
393 #define br_netfilter_init() (0)
394 #define br_netfilter_fini() do { } while(0)
395 #define br_netfilter_rtable_init(x)
399 extern void br_log_state(const struct net_bridge_port
*p
);
400 extern struct net_bridge_port
*br_get_port(struct net_bridge
*br
,
402 extern void br_init_port(struct net_bridge_port
*p
);
403 extern void br_become_designated_port(struct net_bridge_port
*p
);
406 extern void br_stp_enable_bridge(struct net_bridge
*br
);
407 extern void br_stp_disable_bridge(struct net_bridge
*br
);
408 extern void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
409 extern void br_stp_enable_port(struct net_bridge_port
*p
);
410 extern void br_stp_disable_port(struct net_bridge_port
*p
);
411 extern void br_stp_recalculate_bridge_id(struct net_bridge
*br
);
412 extern void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
413 extern void br_stp_set_bridge_priority(struct net_bridge
*br
,
415 extern void br_stp_set_port_priority(struct net_bridge_port
*p
,
417 extern void br_stp_set_path_cost(struct net_bridge_port
*p
,
419 extern ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
423 extern void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
424 struct net_device
*dev
);
427 extern void br_stp_timer_init(struct net_bridge
*br
);
428 extern void br_stp_port_timer_init(struct net_bridge_port
*p
);
429 extern unsigned long br_timer_value(const struct timer_list
*timer
);
432 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
433 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
437 extern int br_netlink_init(void);
438 extern void br_netlink_fini(void);
439 extern void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
443 extern const struct sysfs_ops brport_sysfs_ops
;
444 extern int br_sysfs_addif(struct net_bridge_port
*p
);
447 extern int br_sysfs_addbr(struct net_device
*dev
);
448 extern void br_sysfs_delbr(struct net_device
*dev
);
452 #define br_sysfs_addif(p) (0)
453 #define br_sysfs_addbr(dev) (0)
454 #define br_sysfs_delbr(dev) do { } while(0)
455 #endif /* CONFIG_SYSFS */