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 br_ip 49 { 50 union { 51 __be32 ip4; 52 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 53 struct in6_addr ip6; 54 #endif 55 } u; 56 __be16 proto; 57 }; 58 59 struct net_bridge_fdb_entry 60 { 61 struct hlist_node hlist; 62 struct net_bridge_port *dst; 63 64 struct rcu_head rcu; 65 unsigned long ageing_timer; 66 mac_addr addr; 67 unsigned char is_local; 68 unsigned char is_static; 69 }; 70 71 struct net_bridge_port_group { 72 struct net_bridge_port *port; 73 struct net_bridge_port_group *next; 74 struct hlist_node mglist; 75 struct rcu_head rcu; 76 struct timer_list timer; 77 struct timer_list query_timer; 78 struct br_ip addr; 79 u32 queries_sent; 80 }; 81 82 struct net_bridge_mdb_entry 83 { 84 struct hlist_node hlist[2]; 85 struct hlist_node mglist; 86 struct net_bridge *br; 87 struct net_bridge_port_group *ports; 88 struct rcu_head rcu; 89 struct timer_list timer; 90 struct timer_list query_timer; 91 struct br_ip addr; 92 u32 queries_sent; 93 }; 94 95 struct net_bridge_mdb_htable 96 { 97 struct hlist_head *mhash; 98 struct rcu_head rcu; 99 struct net_bridge_mdb_htable *old; 100 u32 size; 101 u32 max; 102 u32 secret; 103 u32 ver; 104 }; 105 106 struct net_bridge_port 107 { 108 struct net_bridge *br; 109 struct net_device *dev; 110 struct list_head list; 111 112 /* STP */ 113 u8 priority; 114 u8 state; 115 u16 port_no; 116 unsigned char topology_change_ack; 117 unsigned char config_pending; 118 port_id port_id; 119 port_id designated_port; 120 bridge_id designated_root; 121 bridge_id designated_bridge; 122 u32 path_cost; 123 u32 designated_cost; 124 125 struct timer_list forward_delay_timer; 126 struct timer_list hold_timer; 127 struct timer_list message_age_timer; 128 struct kobject kobj; 129 struct rcu_head rcu; 130 131 unsigned long flags; 132 #define BR_HAIRPIN_MODE 0x00000001 133 134 #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; 141 #endif 142 143 #ifdef CONFIG_SYSFS 144 char sysfs_name[IFNAMSIZ]; 145 #endif 146 }; 147 148 struct br_cpu_netstats { 149 unsigned long rx_packets; 150 unsigned long rx_bytes; 151 unsigned long tx_packets; 152 unsigned long tx_bytes; 153 }; 154 155 struct net_bridge 156 { 157 spinlock_t lock; 158 struct list_head port_list; 159 struct net_device *dev; 160 161 struct br_cpu_netstats __percpu *stats; 162 spinlock_t hash_lock; 163 struct hlist_head hash[BR_HASH_SIZE]; 164 unsigned long feature_mask; 165 #ifdef CONFIG_BRIDGE_NETFILTER 166 struct rtable fake_rtable; 167 #endif 168 unsigned long flags; 169 #define BR_SET_MAC_ADDR 0x00000001 170 171 /* STP */ 172 bridge_id designated_root; 173 bridge_id bridge_id; 174 u32 root_path_cost; 175 unsigned long max_age; 176 unsigned long hello_time; 177 unsigned long forward_delay; 178 unsigned long bridge_max_age; 179 unsigned long ageing_time; 180 unsigned long bridge_hello_time; 181 unsigned long bridge_forward_delay; 182 183 u8 group_addr[ETH_ALEN]; 184 u16 root_port; 185 186 enum { 187 BR_NO_STP, /* no spanning tree */ 188 BR_KERNEL_STP, /* old STP in kernel */ 189 BR_USER_STP, /* new RSTP in userspace */ 190 } stp_enabled; 191 192 unsigned char topology_change; 193 unsigned char topology_change_detected; 194 195 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 196 unsigned char multicast_router; 197 198 u8 multicast_disabled:1; 199 200 u32 hash_elasticity; 201 u32 hash_max; 202 203 u32 multicast_last_member_count; 204 u32 multicast_startup_queries_sent; 205 u32 multicast_startup_query_count; 206 207 unsigned long multicast_last_member_interval; 208 unsigned long multicast_membership_interval; 209 unsigned long multicast_querier_interval; 210 unsigned long multicast_query_interval; 211 unsigned long multicast_query_response_interval; 212 unsigned long multicast_startup_query_interval; 213 214 spinlock_t multicast_lock; 215 struct net_bridge_mdb_htable *mdb; 216 struct hlist_head router_list; 217 struct hlist_head mglist; 218 219 struct timer_list multicast_router_timer; 220 struct timer_list multicast_querier_timer; 221 struct timer_list multicast_query_timer; 222 #endif 223 224 struct timer_list hello_timer; 225 struct timer_list tcn_timer; 226 struct timer_list topology_change_timer; 227 struct timer_list gc_timer; 228 struct kobject *ifobj; 229 }; 230 231 struct br_input_skb_cb { 232 struct net_device *brdev; 233 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 234 int igmp; 235 int mrouters_only; 236 #endif 237 }; 238 239 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 240 241 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 242 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 243 #else 244 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 245 #endif 246 247 #define br_printk(level, br, format, args...) \ 248 printk(level "%s: " format, (br)->dev->name, ##args) 249 250 #define br_err(__br, format, args...) \ 251 br_printk(KERN_ERR, __br, format, ##args) 252 #define br_warn(__br, format, args...) \ 253 br_printk(KERN_WARNING, __br, format, ##args) 254 #define br_notice(__br, format, args...) \ 255 br_printk(KERN_NOTICE, __br, format, ##args) 256 #define br_info(__br, format, args...) \ 257 br_printk(KERN_INFO, __br, format, ##args) 258 259 #define br_debug(br, format, args...) \ 260 pr_debug("%s: " format, (br)->dev->name, ##args) 261 262 extern struct notifier_block br_device_notifier; 263 extern const u8 br_group_address[ETH_ALEN]; 264 265 /* called under bridge lock */ 266 static inline int br_is_root_bridge(const struct net_bridge *br) 267 { 268 return !memcmp(&br->bridge_id, &br->designated_root, 8); 269 } 270 271 static inline struct net_bridge_port *br_port(const struct net_device *dev) 272 { 273 return rcu_dereference(dev->br_port); 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 extern void br_netpoll_cleanup(struct net_device *dev); 282 extern void br_netpoll_enable(struct net_bridge *br, 283 struct net_device *dev); 284 extern void br_netpoll_disable(struct net_bridge *br, 285 struct net_device *dev); 286 #else 287 #define br_netpoll_cleanup(br) 288 #define br_netpoll_enable(br, dev) 289 #define br_netpoll_disable(br, dev) 290 291 #endif 292 293 /* br_fdb.c */ 294 extern int br_fdb_init(void); 295 extern void br_fdb_fini(void); 296 extern void br_fdb_flush(struct net_bridge *br); 297 extern void br_fdb_changeaddr(struct net_bridge_port *p, 298 const unsigned char *newaddr); 299 extern void br_fdb_cleanup(unsigned long arg); 300 extern void br_fdb_delete_by_port(struct net_bridge *br, 301 const struct net_bridge_port *p, int do_all); 302 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 303 const unsigned char *addr); 304 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 305 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 306 unsigned long count, unsigned long off); 307 extern int br_fdb_insert(struct net_bridge *br, 308 struct net_bridge_port *source, 309 const unsigned char *addr); 310 extern void br_fdb_update(struct net_bridge *br, 311 struct net_bridge_port *source, 312 const unsigned char *addr); 313 314 /* br_forward.c */ 315 extern void br_deliver(const struct net_bridge_port *to, 316 struct sk_buff *skb); 317 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 318 extern void br_forward(const struct net_bridge_port *to, 319 struct sk_buff *skb, struct sk_buff *skb0); 320 extern int br_forward_finish(struct sk_buff *skb); 321 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 322 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 323 struct sk_buff *skb2); 324 325 /* br_if.c */ 326 extern void br_port_carrier_check(struct net_bridge_port *p); 327 extern int br_add_bridge(struct net *net, const char *name); 328 extern int br_del_bridge(struct net *net, const char *name); 329 extern void br_net_exit(struct net *net); 330 extern int br_add_if(struct net_bridge *br, 331 struct net_device *dev); 332 extern int br_del_if(struct net_bridge *br, 333 struct net_device *dev); 334 extern int br_min_mtu(const struct net_bridge *br); 335 extern void br_features_recompute(struct net_bridge *br); 336 337 /* br_input.c */ 338 extern int br_handle_frame_finish(struct sk_buff *skb); 339 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 340 struct sk_buff *skb); 341 342 /* br_ioctl.c */ 343 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 344 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 345 346 /* br_multicast.c */ 347 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 348 extern int br_multicast_rcv(struct net_bridge *br, 349 struct net_bridge_port *port, 350 struct sk_buff *skb); 351 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 352 struct sk_buff *skb); 353 extern void br_multicast_add_port(struct net_bridge_port *port); 354 extern void br_multicast_del_port(struct net_bridge_port *port); 355 extern void br_multicast_enable_port(struct net_bridge_port *port); 356 extern void br_multicast_disable_port(struct net_bridge_port *port); 357 extern void br_multicast_init(struct net_bridge *br); 358 extern void br_multicast_open(struct net_bridge *br); 359 extern void br_multicast_stop(struct net_bridge *br); 360 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 361 struct sk_buff *skb); 362 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 363 struct sk_buff *skb, struct sk_buff *skb2); 364 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 365 extern int br_multicast_set_port_router(struct net_bridge_port *p, 366 unsigned long val); 367 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 368 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 369 370 static inline bool br_multicast_is_router(struct net_bridge *br) 371 { 372 return br->multicast_router == 2 || 373 (br->multicast_router == 1 && 374 timer_pending(&br->multicast_router_timer)); 375 } 376 #else 377 static inline int br_multicast_rcv(struct net_bridge *br, 378 struct net_bridge_port *port, 379 struct sk_buff *skb) 380 { 381 return 0; 382 } 383 384 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 385 struct sk_buff *skb) 386 { 387 return NULL; 388 } 389 390 static inline void br_multicast_add_port(struct net_bridge_port *port) 391 { 392 } 393 394 static inline void br_multicast_del_port(struct net_bridge_port *port) 395 { 396 } 397 398 static inline void br_multicast_enable_port(struct net_bridge_port *port) 399 { 400 } 401 402 static inline void br_multicast_disable_port(struct net_bridge_port *port) 403 { 404 } 405 406 static inline void br_multicast_init(struct net_bridge *br) 407 { 408 } 409 410 static inline void br_multicast_open(struct net_bridge *br) 411 { 412 } 413 414 static inline void br_multicast_stop(struct net_bridge *br) 415 { 416 } 417 418 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 419 struct sk_buff *skb) 420 { 421 } 422 423 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 424 struct sk_buff *skb, 425 struct sk_buff *skb2) 426 { 427 } 428 static inline bool br_multicast_is_router(struct net_bridge *br) 429 { 430 return 0; 431 } 432 #endif 433 434 /* br_netfilter.c */ 435 #ifdef CONFIG_BRIDGE_NETFILTER 436 extern int br_netfilter_init(void); 437 extern void br_netfilter_fini(void); 438 extern void br_netfilter_rtable_init(struct net_bridge *); 439 #else 440 #define br_netfilter_init() (0) 441 #define br_netfilter_fini() do { } while(0) 442 #define br_netfilter_rtable_init(x) 443 #endif 444 445 /* br_stp.c */ 446 extern void br_log_state(const struct net_bridge_port *p); 447 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 448 u16 port_no); 449 extern void br_init_port(struct net_bridge_port *p); 450 extern void br_become_designated_port(struct net_bridge_port *p); 451 452 /* br_stp_if.c */ 453 extern void br_stp_enable_bridge(struct net_bridge *br); 454 extern void br_stp_disable_bridge(struct net_bridge *br); 455 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 456 extern void br_stp_enable_port(struct net_bridge_port *p); 457 extern void br_stp_disable_port(struct net_bridge_port *p); 458 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 459 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 460 extern void br_stp_set_bridge_priority(struct net_bridge *br, 461 u16 newprio); 462 extern void br_stp_set_port_priority(struct net_bridge_port *p, 463 u8 newprio); 464 extern void br_stp_set_path_cost(struct net_bridge_port *p, 465 u32 path_cost); 466 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 467 468 /* br_stp_bpdu.c */ 469 struct stp_proto; 470 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 471 struct net_device *dev); 472 473 /* br_stp_timer.c */ 474 extern void br_stp_timer_init(struct net_bridge *br); 475 extern void br_stp_port_timer_init(struct net_bridge_port *p); 476 extern unsigned long br_timer_value(const struct timer_list *timer); 477 478 /* br.c */ 479 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 480 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 481 #endif 482 483 /* br_netlink.c */ 484 extern int br_netlink_init(void); 485 extern void br_netlink_fini(void); 486 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 487 488 #ifdef CONFIG_SYSFS 489 /* br_sysfs_if.c */ 490 extern const struct sysfs_ops brport_sysfs_ops; 491 extern int br_sysfs_addif(struct net_bridge_port *p); 492 extern int br_sysfs_renameif(struct net_bridge_port *p); 493 494 /* br_sysfs_br.c */ 495 extern int br_sysfs_addbr(struct net_device *dev); 496 extern void br_sysfs_delbr(struct net_device *dev); 497 498 #else 499 500 #define br_sysfs_addif(p) (0) 501 #define br_sysfs_renameif(p) (0) 502 #define br_sysfs_addbr(dev) (0) 503 #define br_sysfs_delbr(dev) do { } while(0) 504 #endif /* CONFIG_SYSFS */ 505 506 #endif 507