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];
52 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
59 struct net_bridge_fdb_entry
61 struct hlist_node hlist
;
62 struct net_bridge_port
*dst
;
65 unsigned long ageing_timer
;
67 unsigned char is_local
;
68 unsigned char is_static
;
71 struct net_bridge_port_group
{
72 struct net_bridge_port
*port
;
73 struct net_bridge_port_group
*next
;
74 struct hlist_node mglist
;
76 struct timer_list timer
;
77 struct timer_list query_timer
;
82 struct net_bridge_mdb_entry
84 struct hlist_node hlist
[2];
85 struct hlist_node mglist
;
86 struct net_bridge
*br
;
87 struct net_bridge_port_group
*ports
;
89 struct timer_list timer
;
90 struct timer_list query_timer
;
95 struct net_bridge_mdb_htable
97 struct hlist_head
*mhash
;
99 struct net_bridge_mdb_htable
*old
;
106 struct net_bridge_port
108 struct net_bridge
*br
;
109 struct net_device
*dev
;
110 struct list_head list
;
116 unsigned char topology_change_ack
;
117 unsigned char config_pending
;
119 port_id designated_port
;
120 bridge_id designated_root
;
121 bridge_id designated_bridge
;
125 struct timer_list forward_delay_timer
;
126 struct timer_list hold_timer
;
127 struct timer_list message_age_timer
;
132 #define BR_HAIRPIN_MODE 0x00000001
134 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
135 u32 multicast_startup_queries_sent
;
136 unsigned char multicast_router
;
137 struct timer_list multicast_router_timer
;
138 struct timer_list multicast_query_timer
;
139 struct hlist_head mglist
;
140 struct hlist_node rlist
;
144 struct br_cpu_netstats
{
145 unsigned long rx_packets
;
146 unsigned long rx_bytes
;
147 unsigned long tx_packets
;
148 unsigned long tx_bytes
;
154 struct list_head port_list
;
155 struct net_device
*dev
;
157 struct br_cpu_netstats __percpu
*stats
;
158 spinlock_t hash_lock
;
159 struct hlist_head hash
[BR_HASH_SIZE
];
160 unsigned long feature_mask
;
161 #ifdef CONFIG_BRIDGE_NETFILTER
162 struct rtable fake_rtable
;
165 #define BR_SET_MAC_ADDR 0x00000001
168 bridge_id designated_root
;
171 unsigned long max_age
;
172 unsigned long hello_time
;
173 unsigned long forward_delay
;
174 unsigned long bridge_max_age
;
175 unsigned long ageing_time
;
176 unsigned long bridge_hello_time
;
177 unsigned long bridge_forward_delay
;
179 u8 group_addr
[ETH_ALEN
];
183 BR_NO_STP
, /* no spanning tree */
184 BR_KERNEL_STP
, /* old STP in kernel */
185 BR_USER_STP
, /* new RSTP in userspace */
188 unsigned char topology_change
;
189 unsigned char topology_change_detected
;
191 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
192 unsigned char multicast_router
;
194 u8 multicast_disabled
:1;
199 u32 multicast_last_member_count
;
200 u32 multicast_startup_queries_sent
;
201 u32 multicast_startup_query_count
;
203 unsigned long multicast_last_member_interval
;
204 unsigned long multicast_membership_interval
;
205 unsigned long multicast_querier_interval
;
206 unsigned long multicast_query_interval
;
207 unsigned long multicast_query_response_interval
;
208 unsigned long multicast_startup_query_interval
;
210 spinlock_t multicast_lock
;
211 struct net_bridge_mdb_htable
*mdb
;
212 struct hlist_head router_list
;
213 struct hlist_head mglist
;
215 struct timer_list multicast_router_timer
;
216 struct timer_list multicast_querier_timer
;
217 struct timer_list multicast_query_timer
;
220 struct timer_list hello_timer
;
221 struct timer_list tcn_timer
;
222 struct timer_list topology_change_timer
;
223 struct timer_list gc_timer
;
224 struct kobject
*ifobj
;
227 struct br_input_skb_cb
{
228 struct net_device
*brdev
;
229 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
235 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
237 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
238 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
240 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
243 extern struct notifier_block br_device_notifier
;
244 extern const u8 br_group_address
[ETH_ALEN
];
246 /* called under bridge lock */
247 static inline int br_is_root_bridge(const struct net_bridge
*br
)
249 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
253 extern void br_dev_setup(struct net_device
*dev
);
254 extern netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
,
255 struct net_device
*dev
);
256 #ifdef CONFIG_NET_POLL_CONTROLLER
257 extern void br_netpoll_cleanup(struct net_device
*dev
);
258 extern void br_netpoll_enable(struct net_bridge
*br
,
259 struct net_device
*dev
);
260 extern void br_netpoll_disable(struct net_bridge
*br
,
261 struct net_device
*dev
);
263 #define br_netpoll_cleanup(br)
264 #define br_netpoll_enable(br, dev)
265 #define br_netpoll_disable(br, dev)
270 extern int br_fdb_init(void);
271 extern void br_fdb_fini(void);
272 extern void br_fdb_flush(struct net_bridge
*br
);
273 extern void br_fdb_changeaddr(struct net_bridge_port
*p
,
274 const unsigned char *newaddr
);
275 extern void br_fdb_cleanup(unsigned long arg
);
276 extern void br_fdb_delete_by_port(struct net_bridge
*br
,
277 const struct net_bridge_port
*p
, int do_all
);
278 extern struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
279 const unsigned char *addr
);
280 extern int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
281 extern int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
,
282 unsigned long count
, unsigned long off
);
283 extern int br_fdb_insert(struct net_bridge
*br
,
284 struct net_bridge_port
*source
,
285 const unsigned char *addr
);
286 extern void br_fdb_update(struct net_bridge
*br
,
287 struct net_bridge_port
*source
,
288 const unsigned char *addr
);
291 extern void br_deliver(const struct net_bridge_port
*to
,
292 struct sk_buff
*skb
);
293 extern int br_dev_queue_push_xmit(struct sk_buff
*skb
);
294 extern void br_forward(const struct net_bridge_port
*to
,
295 struct sk_buff
*skb
, struct sk_buff
*skb0
);
296 extern int br_forward_finish(struct sk_buff
*skb
);
297 extern void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
);
298 extern void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
299 struct sk_buff
*skb2
);
302 extern void br_port_carrier_check(struct net_bridge_port
*p
);
303 extern int br_add_bridge(struct net
*net
, const char *name
);
304 extern int br_del_bridge(struct net
*net
, const char *name
);
305 extern void br_net_exit(struct net
*net
);
306 extern int br_add_if(struct net_bridge
*br
,
307 struct net_device
*dev
);
308 extern int br_del_if(struct net_bridge
*br
,
309 struct net_device
*dev
);
310 extern int br_min_mtu(const struct net_bridge
*br
);
311 extern void br_features_recompute(struct net_bridge
*br
);
314 extern int br_handle_frame_finish(struct sk_buff
*skb
);
315 extern struct sk_buff
*br_handle_frame(struct net_bridge_port
*p
,
316 struct sk_buff
*skb
);
319 extern int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
320 extern int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
, void __user
*arg
);
323 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
324 extern int br_multicast_rcv(struct net_bridge
*br
,
325 struct net_bridge_port
*port
,
326 struct sk_buff
*skb
);
327 extern struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
328 struct sk_buff
*skb
);
329 extern void br_multicast_add_port(struct net_bridge_port
*port
);
330 extern void br_multicast_del_port(struct net_bridge_port
*port
);
331 extern void br_multicast_enable_port(struct net_bridge_port
*port
);
332 extern void br_multicast_disable_port(struct net_bridge_port
*port
);
333 extern void br_multicast_init(struct net_bridge
*br
);
334 extern void br_multicast_open(struct net_bridge
*br
);
335 extern void br_multicast_stop(struct net_bridge
*br
);
336 extern void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
337 struct sk_buff
*skb
);
338 extern void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
339 struct sk_buff
*skb
, struct sk_buff
*skb2
);
340 extern int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
341 extern int br_multicast_set_port_router(struct net_bridge_port
*p
,
343 extern int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
344 extern int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
346 static inline bool br_multicast_is_router(struct net_bridge
*br
)
348 return br
->multicast_router
== 2 ||
349 (br
->multicast_router
== 1 &&
350 timer_pending(&br
->multicast_router_timer
));
353 static inline int br_multicast_rcv(struct net_bridge
*br
,
354 struct net_bridge_port
*port
,
360 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
366 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
370 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
374 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
378 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
382 static inline void br_multicast_init(struct net_bridge
*br
)
386 static inline void br_multicast_open(struct net_bridge
*br
)
390 static inline void br_multicast_stop(struct net_bridge
*br
)
394 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
399 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
401 struct sk_buff
*skb2
)
404 static inline bool br_multicast_is_router(struct net_bridge
*br
)
411 #ifdef CONFIG_BRIDGE_NETFILTER
412 extern int br_netfilter_init(void);
413 extern void br_netfilter_fini(void);
414 extern void br_netfilter_rtable_init(struct net_bridge
*);
416 #define br_netfilter_init() (0)
417 #define br_netfilter_fini() do { } while(0)
418 #define br_netfilter_rtable_init(x)
422 extern void br_log_state(const struct net_bridge_port
*p
);
423 extern struct net_bridge_port
*br_get_port(struct net_bridge
*br
,
425 extern void br_init_port(struct net_bridge_port
*p
);
426 extern void br_become_designated_port(struct net_bridge_port
*p
);
429 extern void br_stp_enable_bridge(struct net_bridge
*br
);
430 extern void br_stp_disable_bridge(struct net_bridge
*br
);
431 extern void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
432 extern void br_stp_enable_port(struct net_bridge_port
*p
);
433 extern void br_stp_disable_port(struct net_bridge_port
*p
);
434 extern void br_stp_recalculate_bridge_id(struct net_bridge
*br
);
435 extern void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
436 extern void br_stp_set_bridge_priority(struct net_bridge
*br
,
438 extern void br_stp_set_port_priority(struct net_bridge_port
*p
,
440 extern void br_stp_set_path_cost(struct net_bridge_port
*p
,
442 extern ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
446 extern void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
447 struct net_device
*dev
);
450 extern void br_stp_timer_init(struct net_bridge
*br
);
451 extern void br_stp_port_timer_init(struct net_bridge_port
*p
);
452 extern unsigned long br_timer_value(const struct timer_list
*timer
);
455 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
456 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
460 extern int br_netlink_init(void);
461 extern void br_netlink_fini(void);
462 extern void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
466 extern const struct sysfs_ops brport_sysfs_ops
;
467 extern int br_sysfs_addif(struct net_bridge_port
*p
);
470 extern int br_sysfs_addbr(struct net_device
*dev
);
471 extern void br_sysfs_delbr(struct net_device
*dev
);
475 #define br_sysfs_addif(p) (0)
476 #define br_sysfs_addbr(dev) (0)
477 #define br_sysfs_delbr(dev) do { } while(0)
478 #endif /* CONFIG_SYSFS */