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 */