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 <linux/netpoll.h>
19 #include <net/route.h>
21 #define BR_HASH_BITS 8
22 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
24 #define BR_HOLD_TIME (1*HZ)
26 #define BR_PORT_BITS 10
27 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
29 #define BR_VERSION "2.3"
31 /* Path to usermode spanning tree program */
32 #define BR_STP_PROG "/sbin/bridge-stp"
34 typedef struct bridge_id bridge_id;
35 typedef struct mac_addr mac_addr;
36 typedef __u16 port_id;
40 unsigned char prio[2];
41 unsigned char addr[6];
46 unsigned char addr[6];
53 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
60 struct net_bridge_fdb_entry
62 struct hlist_node hlist;
63 struct net_bridge_port *dst;
66 unsigned long ageing_timer;
68 unsigned char is_local;
69 unsigned char is_static;
72 struct net_bridge_port_group {
73 struct net_bridge_port *port;
74 struct net_bridge_port_group *next;
75 struct hlist_node mglist;
77 struct timer_list timer;
78 struct timer_list query_timer;
83 struct net_bridge_mdb_entry
85 struct hlist_node hlist[2];
86 struct hlist_node mglist;
87 struct net_bridge *br;
88 struct net_bridge_port_group *ports;
90 struct timer_list timer;
91 struct timer_list query_timer;
96 struct net_bridge_mdb_htable
98 struct hlist_head *mhash;
100 struct net_bridge_mdb_htable *old;
107 struct net_bridge_port
109 struct net_bridge *br;
110 struct net_device *dev;
111 struct list_head list;
117 unsigned char topology_change_ack;
118 unsigned char config_pending;
120 port_id designated_port;
121 bridge_id designated_root;
122 bridge_id designated_bridge;
126 struct timer_list forward_delay_timer;
127 struct timer_list hold_timer;
128 struct timer_list message_age_timer;
133 #define BR_HAIRPIN_MODE 0x00000001
135 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
136 u32 multicast_startup_queries_sent;
137 unsigned char multicast_router;
138 struct timer_list multicast_router_timer;
139 struct timer_list multicast_query_timer;
140 struct hlist_head mglist;
141 struct hlist_node rlist;
145 char sysfs_name[IFNAMSIZ];
148 #ifdef CONFIG_NET_POLL_CONTROLLER
153 #define br_port_get_rcu(dev) \
154 ((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
155 #define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
156 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
158 struct br_cpu_netstats {
159 unsigned long rx_packets;
160 unsigned long rx_bytes;
161 unsigned long tx_packets;
162 unsigned long tx_bytes;
168 struct list_head port_list;
169 struct net_device *dev;
171 struct br_cpu_netstats __percpu *stats;
172 spinlock_t hash_lock;
173 struct hlist_head hash[BR_HASH_SIZE];
174 unsigned long feature_mask;
175 #ifdef CONFIG_BRIDGE_NETFILTER
176 struct rtable fake_rtable;
179 #define BR_SET_MAC_ADDR 0x00000001
182 bridge_id designated_root;
185 unsigned long max_age;
186 unsigned long hello_time;
187 unsigned long forward_delay;
188 unsigned long bridge_max_age;
189 unsigned long ageing_time;
190 unsigned long bridge_hello_time;
191 unsigned long bridge_forward_delay;
193 u8 group_addr[ETH_ALEN];
197 BR_NO_STP, /* no spanning tree */
198 BR_KERNEL_STP, /* old STP in kernel */
199 BR_USER_STP, /* new RSTP in userspace */
202 unsigned char topology_change;
203 unsigned char topology_change_detected;
205 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
206 unsigned char multicast_router;
208 u8 multicast_disabled:1;
213 u32 multicast_last_member_count;
214 u32 multicast_startup_queries_sent;
215 u32 multicast_startup_query_count;
217 unsigned long multicast_last_member_interval;
218 unsigned long multicast_membership_interval;
219 unsigned long multicast_querier_interval;
220 unsigned long multicast_query_interval;
221 unsigned long multicast_query_response_interval;
222 unsigned long multicast_startup_query_interval;
224 spinlock_t multicast_lock;
225 struct net_bridge_mdb_htable *mdb;
226 struct hlist_head router_list;
227 struct hlist_head mglist;
229 struct timer_list multicast_router_timer;
230 struct timer_list multicast_querier_timer;
231 struct timer_list multicast_query_timer;
234 struct timer_list hello_timer;
235 struct timer_list tcn_timer;
236 struct timer_list topology_change_timer;
237 struct timer_list gc_timer;
238 struct kobject *ifobj;
241 struct br_input_skb_cb {
242 struct net_device *brdev;
243 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
249 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
251 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
252 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
254 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
257 #define br_printk(level, br, format, args...) \
258 printk(level "%s: " format, (br)->dev->name, ##args)
260 #define br_err(__br, format, args...) \
261 br_printk(KERN_ERR, __br, format, ##args)
262 #define br_warn(__br, format, args...) \
263 br_printk(KERN_WARNING, __br, format, ##args)
264 #define br_notice(__br, format, args...) \
265 br_printk(KERN_NOTICE, __br, format, ##args)
266 #define br_info(__br, format, args...) \
267 br_printk(KERN_INFO, __br, format, ##args)
269 #define br_debug(br, format, args...) \
270 pr_debug("%s: " format, (br)->dev->name, ##args)
272 extern struct notifier_block br_device_notifier;
273 extern const u8 br_group_address[ETH_ALEN];
275 /* called under bridge lock */
276 static inline int br_is_root_bridge(const struct net_bridge *br)
278 return !memcmp(&br->bridge_id, &br->designated_root, 8);
282 extern void br_dev_setup(struct net_device *dev);
283 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
284 struct net_device *dev);
285 #ifdef CONFIG_NET_POLL_CONTROLLER
286 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
288 return br->dev->npinfo;
291 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
294 struct netpoll *np = p->np;
297 netpoll_send_skb(np, skb);
300 extern int br_netpoll_enable(struct net_bridge_port *p);
301 extern void br_netpoll_disable(struct net_bridge_port *p);
303 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
308 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
313 static inline int br_netpoll_enable(struct net_bridge_port *p)
318 static inline void br_netpoll_disable(struct net_bridge_port *p)
324 extern int br_fdb_init(void);
325 extern void br_fdb_fini(void);
326 extern void br_fdb_flush(struct net_bridge *br);
327 extern void br_fdb_changeaddr(struct net_bridge_port *p,
328 const unsigned char *newaddr);
329 extern void br_fdb_cleanup(unsigned long arg);
330 extern void br_fdb_delete_by_port(struct net_bridge *br,
331 const struct net_bridge_port *p, int do_all);
332 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
333 const unsigned char *addr);
334 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
335 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
336 unsigned long count, unsigned long off);
337 extern int br_fdb_insert(struct net_bridge *br,
338 struct net_bridge_port *source,
339 const unsigned char *addr);
340 extern void br_fdb_update(struct net_bridge *br,
341 struct net_bridge_port *source,
342 const unsigned char *addr);
345 extern void br_deliver(const struct net_bridge_port *to,
346 struct sk_buff *skb);
347 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
348 extern void br_forward(const struct net_bridge_port *to,
349 struct sk_buff *skb, struct sk_buff *skb0);
350 extern int br_forward_finish(struct sk_buff *skb);
351 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
352 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
353 struct sk_buff *skb2);
356 extern void br_port_carrier_check(struct net_bridge_port *p);
357 extern int br_add_bridge(struct net *net, const char *name);
358 extern int br_del_bridge(struct net *net, const char *name);
359 extern void br_net_exit(struct net *net);
360 extern int br_add_if(struct net_bridge *br,
361 struct net_device *dev);
362 extern int br_del_if(struct net_bridge *br,
363 struct net_device *dev);
364 extern int br_min_mtu(const struct net_bridge *br);
365 extern void br_features_recompute(struct net_bridge *br);
368 extern int br_handle_frame_finish(struct sk_buff *skb);
369 extern struct sk_buff *br_handle_frame(struct sk_buff *skb);
372 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
373 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
376 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
377 extern int br_multicast_rcv(struct net_bridge *br,
378 struct net_bridge_port *port,
379 struct sk_buff *skb);
380 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
381 struct sk_buff *skb);
382 extern void br_multicast_add_port(struct net_bridge_port *port);
383 extern void br_multicast_del_port(struct net_bridge_port *port);
384 extern void br_multicast_enable_port(struct net_bridge_port *port);
385 extern void br_multicast_disable_port(struct net_bridge_port *port);
386 extern void br_multicast_init(struct net_bridge *br);
387 extern void br_multicast_open(struct net_bridge *br);
388 extern void br_multicast_stop(struct net_bridge *br);
389 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
390 struct sk_buff *skb);
391 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
392 struct sk_buff *skb, struct sk_buff *skb2);
393 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
394 extern int br_multicast_set_port_router(struct net_bridge_port *p,
396 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
397 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
399 static inline bool br_multicast_is_router(struct net_bridge *br)
401 return br->multicast_router == 2 ||
402 (br->multicast_router == 1 &&
403 timer_pending(&br->multicast_router_timer));
406 static inline int br_multicast_rcv(struct net_bridge *br,
407 struct net_bridge_port *port,
413 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
419 static inline void br_multicast_add_port(struct net_bridge_port *port)
423 static inline void br_multicast_del_port(struct net_bridge_port *port)
427 static inline void br_multicast_enable_port(struct net_bridge_port *port)
431 static inline void br_multicast_disable_port(struct net_bridge_port *port)
435 static inline void br_multicast_init(struct net_bridge *br)
439 static inline void br_multicast_open(struct net_bridge *br)
443 static inline void br_multicast_stop(struct net_bridge *br)
447 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
452 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
454 struct sk_buff *skb2)
457 static inline bool br_multicast_is_router(struct net_bridge *br)
464 #ifdef CONFIG_BRIDGE_NETFILTER
465 extern int br_netfilter_init(void);
466 extern void br_netfilter_fini(void);
467 extern void br_netfilter_rtable_init(struct net_bridge *);
469 #define br_netfilter_init() (0)
470 #define br_netfilter_fini() do { } while(0)
471 #define br_netfilter_rtable_init(x)
475 extern void br_log_state(const struct net_bridge_port *p);
476 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
478 extern void br_init_port(struct net_bridge_port *p);
479 extern void br_become_designated_port(struct net_bridge_port *p);
482 extern void br_stp_enable_bridge(struct net_bridge *br);
483 extern void br_stp_disable_bridge(struct net_bridge *br);
484 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
485 extern void br_stp_enable_port(struct net_bridge_port *p);
486 extern void br_stp_disable_port(struct net_bridge_port *p);
487 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
488 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
489 extern void br_stp_set_bridge_priority(struct net_bridge *br,
491 extern void br_stp_set_port_priority(struct net_bridge_port *p,
493 extern void br_stp_set_path_cost(struct net_bridge_port *p,
495 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
499 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
500 struct net_device *dev);
503 extern void br_stp_timer_init(struct net_bridge *br);
504 extern void br_stp_port_timer_init(struct net_bridge_port *p);
505 extern unsigned long br_timer_value(const struct timer_list *timer);
508 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
509 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
513 extern int br_netlink_init(void);
514 extern void br_netlink_fini(void);
515 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
519 extern const struct sysfs_ops brport_sysfs_ops;
520 extern int br_sysfs_addif(struct net_bridge_port *p);
521 extern int br_sysfs_renameif(struct net_bridge_port *p);
524 extern int br_sysfs_addbr(struct net_device *dev);
525 extern void br_sysfs_delbr(struct net_device *dev);
529 #define br_sysfs_addif(p) (0)
530 #define br_sysfs_renameif(p) (0)
531 #define br_sysfs_addbr(dev) (0)
532 #define br_sysfs_delbr(dev) do { } while(0)
533 #endif /* CONFIG_SYSFS */