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 33 typedef struct bridge_id bridge_id; 34 typedef struct mac_addr mac_addr; 35 typedef __u16 port_id; 36 37 struct bridge_id 38 { 39 unsigned char prio[2]; 40 unsigned char addr[6]; 41 }; 42 43 struct mac_addr 44 { 45 unsigned char addr[6]; 46 }; 47 48 struct 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 60 struct 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 71 struct 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 84 struct 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 95 struct 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 }; 132 133 struct 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 }; 206 207 struct 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 222 223 extern struct notifier_block br_device_notifier; 224 extern const u8 br_group_address[ETH_ALEN]; 225 226 /* called under bridge lock */ 227 static 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 */ 233 extern void br_dev_setup(struct net_device *dev); 234 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 235 struct net_device *dev); 236 237 /* br_fdb.c */ 238 extern int br_fdb_init(void); 239 extern void br_fdb_fini(void); 240 extern void br_fdb_flush(struct net_bridge *br); 241 extern void br_fdb_changeaddr(struct net_bridge_port *p, 242 const unsigned char *newaddr); 243 extern void br_fdb_cleanup(unsigned long arg); 244 extern void br_fdb_delete_by_port(struct net_bridge *br, 245 const struct net_bridge_port *p, int do_all); 246 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 247 const unsigned char *addr); 248 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 249 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 250 unsigned long count, unsigned long off); 251 extern int br_fdb_insert(struct net_bridge *br, 252 struct net_bridge_port *source, 253 const unsigned char *addr); 254 extern void br_fdb_update(struct net_bridge *br, 255 struct net_bridge_port *source, 256 const unsigned char *addr); 257 258 /* br_forward.c */ 259 extern void br_deliver(const struct net_bridge_port *to, 260 struct sk_buff *skb); 261 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 262 extern void br_forward(const struct net_bridge_port *to, 263 struct sk_buff *skb, struct sk_buff *skb0); 264 extern int br_forward_finish(struct sk_buff *skb); 265 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 266 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 267 struct sk_buff *skb2); 268 269 /* br_if.c */ 270 extern void br_port_carrier_check(struct net_bridge_port *p); 271 extern int br_add_bridge(struct net *net, const char *name); 272 extern int br_del_bridge(struct net *net, const char *name); 273 extern void br_net_exit(struct net *net); 274 extern int br_add_if(struct net_bridge *br, 275 struct net_device *dev); 276 extern int br_del_if(struct net_bridge *br, 277 struct net_device *dev); 278 extern int br_min_mtu(const struct net_bridge *br); 279 extern void br_features_recompute(struct net_bridge *br); 280 281 /* br_input.c */ 282 extern int br_handle_frame_finish(struct sk_buff *skb); 283 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 284 struct sk_buff *skb); 285 286 /* br_ioctl.c */ 287 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 288 extern 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 292 extern int br_multicast_rcv(struct net_bridge *br, 293 struct net_bridge_port *port, 294 struct sk_buff *skb); 295 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 296 struct sk_buff *skb); 297 extern void br_multicast_add_port(struct net_bridge_port *port); 298 extern void br_multicast_del_port(struct net_bridge_port *port); 299 extern void br_multicast_enable_port(struct net_bridge_port *port); 300 extern void br_multicast_disable_port(struct net_bridge_port *port); 301 extern void br_multicast_init(struct net_bridge *br); 302 extern void br_multicast_open(struct net_bridge *br); 303 extern void br_multicast_stop(struct net_bridge *br); 304 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 305 struct sk_buff *skb); 306 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 307 struct sk_buff *skb, struct sk_buff *skb2); 308 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 309 extern int br_multicast_set_port_router(struct net_bridge_port *p, 310 unsigned long val); 311 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 312 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 313 314 static 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 321 static 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 } 327 328 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 329 struct sk_buff *skb) 330 { 331 return NULL; 332 } 333 334 static inline void br_multicast_add_port(struct net_bridge_port *port) 335 { 336 } 337 338 static inline void br_multicast_del_port(struct net_bridge_port *port) 339 { 340 } 341 342 static inline void br_multicast_enable_port(struct net_bridge_port *port) 343 { 344 } 345 346 static inline void br_multicast_disable_port(struct net_bridge_port *port) 347 { 348 } 349 350 static inline void br_multicast_init(struct net_bridge *br) 351 { 352 } 353 354 static inline void br_multicast_open(struct net_bridge *br) 355 { 356 } 357 358 static inline void br_multicast_stop(struct net_bridge *br) 359 { 360 } 361 362 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 363 struct sk_buff *skb) 364 { 365 } 366 367 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 368 struct sk_buff *skb, 369 struct sk_buff *skb2) 370 { 371 } 372 static 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 380 extern int br_netfilter_init(void); 381 extern void br_netfilter_fini(void); 382 extern 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 */ 390 extern void br_log_state(const struct net_bridge_port *p); 391 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 392 u16 port_no); 393 extern void br_init_port(struct net_bridge_port *p); 394 extern void br_become_designated_port(struct net_bridge_port *p); 395 396 /* br_stp_if.c */ 397 extern void br_stp_enable_bridge(struct net_bridge *br); 398 extern void br_stp_disable_bridge(struct net_bridge *br); 399 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 400 extern void br_stp_enable_port(struct net_bridge_port *p); 401 extern void br_stp_disable_port(struct net_bridge_port *p); 402 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 403 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 404 extern void br_stp_set_bridge_priority(struct net_bridge *br, 405 u16 newprio); 406 extern void br_stp_set_port_priority(struct net_bridge_port *p, 407 u8 newprio); 408 extern void br_stp_set_path_cost(struct net_bridge_port *p, 409 u32 path_cost); 410 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 411 412 /* br_stp_bpdu.c */ 413 struct stp_proto; 414 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 415 struct net_device *dev); 416 417 /* br_stp_timer.c */ 418 extern void br_stp_timer_init(struct net_bridge *br); 419 extern void br_stp_port_timer_init(struct net_bridge_port *p); 420 extern 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) 424 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 425 #endif 426 427 /* br_netlink.c */ 428 extern int br_netlink_init(void); 429 extern void br_netlink_fini(void); 430 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 431 432 #ifdef CONFIG_SYSFS 433 /* br_sysfs_if.c */ 434 extern const struct sysfs_ops brport_sysfs_ops; 435 extern int br_sysfs_addif(struct net_bridge_port *p); 436 437 /* br_sysfs_br.c */ 438 extern int br_sysfs_addbr(struct net_device *dev); 439 extern 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 449