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 <linux/netpoll.h> 19 #include <net/route.h> 20 21 #define BR_HASH_BITS 8 22 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 23 24 #define BR_HOLD_TIME (1*HZ) 25 26 #define BR_PORT_BITS 10 27 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 28 29 #define BR_VERSION "2.3" 30 31 /* Path to usermode spanning tree program */ 32 #define BR_STP_PROG "/sbin/bridge-stp" 33 34 typedef struct bridge_id bridge_id; 35 typedef struct mac_addr mac_addr; 36 typedef __u16 port_id; 37 38 struct bridge_id 39 { 40 unsigned char prio[2]; 41 unsigned char addr[6]; 42 }; 43 44 struct mac_addr 45 { 46 unsigned char addr[6]; 47 }; 48 49 struct br_ip 50 { 51 union { 52 __be32 ip4; 53 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 54 struct in6_addr ip6; 55 #endif 56 } u; 57 __be16 proto; 58 }; 59 60 struct net_bridge_fdb_entry 61 { 62 struct hlist_node hlist; 63 struct net_bridge_port *dst; 64 65 struct rcu_head rcu; 66 unsigned long ageing_timer; 67 mac_addr addr; 68 unsigned char is_local; 69 unsigned char is_static; 70 }; 71 72 struct net_bridge_port_group { 73 struct net_bridge_port *port; 74 struct net_bridge_port_group *next; 75 struct hlist_node mglist; 76 struct rcu_head rcu; 77 struct timer_list timer; 78 struct timer_list query_timer; 79 struct br_ip addr; 80 u32 queries_sent; 81 }; 82 83 struct net_bridge_mdb_entry 84 { 85 struct hlist_node hlist[2]; 86 struct hlist_node mglist; 87 struct net_bridge *br; 88 struct net_bridge_port_group *ports; 89 struct rcu_head rcu; 90 struct timer_list timer; 91 struct timer_list query_timer; 92 struct br_ip addr; 93 u32 queries_sent; 94 }; 95 96 struct net_bridge_mdb_htable 97 { 98 struct hlist_head *mhash; 99 struct rcu_head rcu; 100 struct net_bridge_mdb_htable *old; 101 u32 size; 102 u32 max; 103 u32 secret; 104 u32 ver; 105 }; 106 107 struct net_bridge_port 108 { 109 struct net_bridge *br; 110 struct net_device *dev; 111 struct list_head list; 112 113 /* STP */ 114 u8 priority; 115 u8 state; 116 u16 port_no; 117 unsigned char topology_change_ack; 118 unsigned char config_pending; 119 port_id port_id; 120 port_id designated_port; 121 bridge_id designated_root; 122 bridge_id designated_bridge; 123 u32 path_cost; 124 u32 designated_cost; 125 126 struct timer_list forward_delay_timer; 127 struct timer_list hold_timer; 128 struct timer_list message_age_timer; 129 struct kobject kobj; 130 struct rcu_head rcu; 131 132 unsigned long flags; 133 #define BR_HAIRPIN_MODE 0x00000001 134 135 #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; 142 #endif 143 144 #ifdef CONFIG_SYSFS 145 char sysfs_name[IFNAMSIZ]; 146 #endif 147 148 #ifdef CONFIG_NET_POLL_CONTROLLER 149 struct netpoll *np; 150 #endif 151 }; 152 153 struct br_cpu_netstats { 154 unsigned long rx_packets; 155 unsigned long rx_bytes; 156 unsigned long tx_packets; 157 unsigned long tx_bytes; 158 }; 159 160 struct net_bridge 161 { 162 spinlock_t lock; 163 struct list_head port_list; 164 struct net_device *dev; 165 166 struct br_cpu_netstats __percpu *stats; 167 spinlock_t hash_lock; 168 struct hlist_head hash[BR_HASH_SIZE]; 169 unsigned long feature_mask; 170 #ifdef CONFIG_BRIDGE_NETFILTER 171 struct rtable fake_rtable; 172 #endif 173 unsigned long flags; 174 #define BR_SET_MAC_ADDR 0x00000001 175 176 /* STP */ 177 bridge_id designated_root; 178 bridge_id bridge_id; 179 u32 root_path_cost; 180 unsigned long max_age; 181 unsigned long hello_time; 182 unsigned long forward_delay; 183 unsigned long bridge_max_age; 184 unsigned long ageing_time; 185 unsigned long bridge_hello_time; 186 unsigned long bridge_forward_delay; 187 188 u8 group_addr[ETH_ALEN]; 189 u16 root_port; 190 191 enum { 192 BR_NO_STP, /* no spanning tree */ 193 BR_KERNEL_STP, /* old STP in kernel */ 194 BR_USER_STP, /* new RSTP in userspace */ 195 } stp_enabled; 196 197 unsigned char topology_change; 198 unsigned char topology_change_detected; 199 200 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 201 unsigned char multicast_router; 202 203 u8 multicast_disabled:1; 204 205 u32 hash_elasticity; 206 u32 hash_max; 207 208 u32 multicast_last_member_count; 209 u32 multicast_startup_queries_sent; 210 u32 multicast_startup_query_count; 211 212 unsigned long multicast_last_member_interval; 213 unsigned long multicast_membership_interval; 214 unsigned long multicast_querier_interval; 215 unsigned long multicast_query_interval; 216 unsigned long multicast_query_response_interval; 217 unsigned long multicast_startup_query_interval; 218 219 spinlock_t multicast_lock; 220 struct net_bridge_mdb_htable *mdb; 221 struct hlist_head router_list; 222 struct hlist_head mglist; 223 224 struct timer_list multicast_router_timer; 225 struct timer_list multicast_querier_timer; 226 struct timer_list multicast_query_timer; 227 #endif 228 229 struct timer_list hello_timer; 230 struct timer_list tcn_timer; 231 struct timer_list topology_change_timer; 232 struct timer_list gc_timer; 233 struct kobject *ifobj; 234 }; 235 236 struct br_input_skb_cb { 237 struct net_device *brdev; 238 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 239 int igmp; 240 int mrouters_only; 241 #endif 242 }; 243 244 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 245 246 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 247 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 248 #else 249 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 250 #endif 251 252 #define br_printk(level, br, format, args...) \ 253 printk(level "%s: " format, (br)->dev->name, ##args) 254 255 #define br_err(__br, format, args...) \ 256 br_printk(KERN_ERR, __br, format, ##args) 257 #define br_warn(__br, format, args...) \ 258 br_printk(KERN_WARNING, __br, format, ##args) 259 #define br_notice(__br, format, args...) \ 260 br_printk(KERN_NOTICE, __br, format, ##args) 261 #define br_info(__br, format, args...) \ 262 br_printk(KERN_INFO, __br, format, ##args) 263 264 #define br_debug(br, format, args...) \ 265 pr_debug("%s: " format, (br)->dev->name, ##args) 266 267 extern struct notifier_block br_device_notifier; 268 extern const u8 br_group_address[ETH_ALEN]; 269 270 /* called under bridge lock */ 271 static inline int br_is_root_bridge(const struct net_bridge *br) 272 { 273 return !memcmp(&br->bridge_id, &br->designated_root, 8); 274 } 275 276 /* br_device.c */ 277 extern void br_dev_setup(struct net_device *dev); 278 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 279 struct net_device *dev); 280 #ifdef CONFIG_NET_POLL_CONTROLLER 281 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 282 { 283 return br->dev->npinfo; 284 } 285 286 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 287 struct sk_buff *skb) 288 { 289 struct netpoll *np = p->np; 290 291 if (np) 292 netpoll_send_skb(np, skb); 293 } 294 295 extern int br_netpoll_enable(struct net_bridge_port *p); 296 extern void br_netpoll_disable(struct net_bridge_port *p); 297 #else 298 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 299 { 300 return NULL; 301 } 302 303 static inline void br_netpoll_send_skb(struct net_bridge_port *p, 304 struct sk_buff *skb) 305 { 306 } 307 308 static inline int br_netpoll_enable(struct net_bridge_port *p) 309 { 310 return 0; 311 } 312 313 static inline void br_netpoll_disable(struct net_bridge_port *p) 314 { 315 } 316 #endif 317 318 /* br_fdb.c */ 319 extern int br_fdb_init(void); 320 extern void br_fdb_fini(void); 321 extern void br_fdb_flush(struct net_bridge *br); 322 extern void br_fdb_changeaddr(struct net_bridge_port *p, 323 const unsigned char *newaddr); 324 extern void br_fdb_cleanup(unsigned long arg); 325 extern void br_fdb_delete_by_port(struct net_bridge *br, 326 const struct net_bridge_port *p, int do_all); 327 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 328 const unsigned char *addr); 329 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 330 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 331 unsigned long count, unsigned long off); 332 extern int br_fdb_insert(struct net_bridge *br, 333 struct net_bridge_port *source, 334 const unsigned char *addr); 335 extern void br_fdb_update(struct net_bridge *br, 336 struct net_bridge_port *source, 337 const unsigned char *addr); 338 339 /* br_forward.c */ 340 extern void br_deliver(const struct net_bridge_port *to, 341 struct sk_buff *skb); 342 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 343 extern void br_forward(const struct net_bridge_port *to, 344 struct sk_buff *skb, struct sk_buff *skb0); 345 extern int br_forward_finish(struct sk_buff *skb); 346 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 347 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 348 struct sk_buff *skb2); 349 350 /* br_if.c */ 351 extern void br_port_carrier_check(struct net_bridge_port *p); 352 extern int br_add_bridge(struct net *net, const char *name); 353 extern int br_del_bridge(struct net *net, const char *name); 354 extern void br_net_exit(struct net *net); 355 extern int br_add_if(struct net_bridge *br, 356 struct net_device *dev); 357 extern int br_del_if(struct net_bridge *br, 358 struct net_device *dev); 359 extern int br_min_mtu(const struct net_bridge *br); 360 extern void br_features_recompute(struct net_bridge *br); 361 362 /* br_input.c */ 363 extern int br_handle_frame_finish(struct sk_buff *skb); 364 extern struct sk_buff *br_handle_frame(struct sk_buff *skb); 365 366 /* br_ioctl.c */ 367 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 368 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 369 370 /* br_multicast.c */ 371 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 372 extern int br_multicast_rcv(struct net_bridge *br, 373 struct net_bridge_port *port, 374 struct sk_buff *skb); 375 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 376 struct sk_buff *skb); 377 extern void br_multicast_add_port(struct net_bridge_port *port); 378 extern void br_multicast_del_port(struct net_bridge_port *port); 379 extern void br_multicast_enable_port(struct net_bridge_port *port); 380 extern void br_multicast_disable_port(struct net_bridge_port *port); 381 extern void br_multicast_init(struct net_bridge *br); 382 extern void br_multicast_open(struct net_bridge *br); 383 extern void br_multicast_stop(struct net_bridge *br); 384 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 385 struct sk_buff *skb); 386 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 387 struct sk_buff *skb, struct sk_buff *skb2); 388 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 389 extern int br_multicast_set_port_router(struct net_bridge_port *p, 390 unsigned long val); 391 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 392 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 393 394 static inline bool br_multicast_is_router(struct net_bridge *br) 395 { 396 return br->multicast_router == 2 || 397 (br->multicast_router == 1 && 398 timer_pending(&br->multicast_router_timer)); 399 } 400 #else 401 static inline int br_multicast_rcv(struct net_bridge *br, 402 struct net_bridge_port *port, 403 struct sk_buff *skb) 404 { 405 return 0; 406 } 407 408 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 409 struct sk_buff *skb) 410 { 411 return NULL; 412 } 413 414 static inline void br_multicast_add_port(struct net_bridge_port *port) 415 { 416 } 417 418 static inline void br_multicast_del_port(struct net_bridge_port *port) 419 { 420 } 421 422 static inline void br_multicast_enable_port(struct net_bridge_port *port) 423 { 424 } 425 426 static inline void br_multicast_disable_port(struct net_bridge_port *port) 427 { 428 } 429 430 static inline void br_multicast_init(struct net_bridge *br) 431 { 432 } 433 434 static inline void br_multicast_open(struct net_bridge *br) 435 { 436 } 437 438 static inline void br_multicast_stop(struct net_bridge *br) 439 { 440 } 441 442 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 443 struct sk_buff *skb) 444 { 445 } 446 447 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 448 struct sk_buff *skb, 449 struct sk_buff *skb2) 450 { 451 } 452 static inline bool br_multicast_is_router(struct net_bridge *br) 453 { 454 return 0; 455 } 456 #endif 457 458 /* br_netfilter.c */ 459 #ifdef CONFIG_BRIDGE_NETFILTER 460 extern int br_netfilter_init(void); 461 extern void br_netfilter_fini(void); 462 extern void br_netfilter_rtable_init(struct net_bridge *); 463 #else 464 #define br_netfilter_init() (0) 465 #define br_netfilter_fini() do { } while(0) 466 #define br_netfilter_rtable_init(x) 467 #endif 468 469 /* br_stp.c */ 470 extern void br_log_state(const struct net_bridge_port *p); 471 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 472 u16 port_no); 473 extern void br_init_port(struct net_bridge_port *p); 474 extern void br_become_designated_port(struct net_bridge_port *p); 475 476 /* br_stp_if.c */ 477 extern void br_stp_enable_bridge(struct net_bridge *br); 478 extern void br_stp_disable_bridge(struct net_bridge *br); 479 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 480 extern void br_stp_enable_port(struct net_bridge_port *p); 481 extern void br_stp_disable_port(struct net_bridge_port *p); 482 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 483 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 484 extern void br_stp_set_bridge_priority(struct net_bridge *br, 485 u16 newprio); 486 extern void br_stp_set_port_priority(struct net_bridge_port *p, 487 u8 newprio); 488 extern void br_stp_set_path_cost(struct net_bridge_port *p, 489 u32 path_cost); 490 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 491 492 /* br_stp_bpdu.c */ 493 struct stp_proto; 494 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 495 struct net_device *dev); 496 497 /* br_stp_timer.c */ 498 extern void br_stp_timer_init(struct net_bridge *br); 499 extern void br_stp_port_timer_init(struct net_bridge_port *p); 500 extern unsigned long br_timer_value(const struct timer_list *timer); 501 502 /* br.c */ 503 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 504 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 505 #endif 506 507 /* br_netlink.c */ 508 extern int br_netlink_init(void); 509 extern void br_netlink_fini(void); 510 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 511 512 #ifdef CONFIG_SYSFS 513 /* br_sysfs_if.c */ 514 extern const struct sysfs_ops brport_sysfs_ops; 515 extern int br_sysfs_addif(struct net_bridge_port *p); 516 extern int br_sysfs_renameif(struct net_bridge_port *p); 517 518 /* br_sysfs_br.c */ 519 extern int br_sysfs_addbr(struct net_device *dev); 520 extern void br_sysfs_delbr(struct net_device *dev); 521 522 #else 523 524 #define br_sysfs_addif(p) (0) 525 #define br_sysfs_renameif(p) (0) 526 #define br_sysfs_addbr(dev) (0) 527 #define br_sysfs_delbr(dev) do { } while(0) 528 #endif /* CONFIG_SYSFS */ 529 530 #endif 531