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 <linux/u64_stats_sync.h> 20 #include <net/route.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_VERSION "2.3" 31 32 /* Path to usermode spanning tree program */ 33 #define BR_STP_PROG "/sbin/bridge-stp" 34 35 typedef struct bridge_id bridge_id; 36 typedef struct mac_addr mac_addr; 37 typedef __u16 port_id; 38 39 struct bridge_id 40 { 41 unsigned char prio[2]; 42 unsigned char addr[6]; 43 }; 44 45 struct mac_addr 46 { 47 unsigned char addr[6]; 48 }; 49 50 struct br_ip 51 { 52 union { 53 __be32 ip4; 54 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 55 struct in6_addr ip6; 56 #endif 57 } u; 58 __be16 proto; 59 }; 60 61 struct net_bridge_fdb_entry 62 { 63 struct hlist_node hlist; 64 struct net_bridge_port *dst; 65 66 struct rcu_head rcu; 67 unsigned long ageing_timer; 68 mac_addr addr; 69 unsigned char is_local; 70 unsigned char is_static; 71 }; 72 73 struct net_bridge_port_group { 74 struct net_bridge_port *port; 75 struct net_bridge_port_group __rcu *next; 76 struct hlist_node mglist; 77 struct rcu_head rcu; 78 struct timer_list timer; 79 struct timer_list query_timer; 80 struct br_ip addr; 81 u32 queries_sent; 82 }; 83 84 struct net_bridge_mdb_entry 85 { 86 struct hlist_node hlist[2]; 87 struct hlist_node mglist; 88 struct net_bridge *br; 89 struct net_bridge_port_group __rcu *ports; 90 struct rcu_head rcu; 91 struct timer_list timer; 92 struct timer_list query_timer; 93 struct br_ip addr; 94 u32 queries_sent; 95 }; 96 97 struct net_bridge_mdb_htable 98 { 99 struct hlist_head *mhash; 100 struct rcu_head rcu; 101 struct net_bridge_mdb_htable *old; 102 u32 size; 103 u32 max; 104 u32 secret; 105 u32 ver; 106 }; 107 108 struct net_bridge_port 109 { 110 struct net_bridge *br; 111 struct net_device *dev; 112 struct list_head list; 113 114 /* STP */ 115 u8 priority; 116 u8 state; 117 u16 port_no; 118 unsigned char topology_change_ack; 119 unsigned char config_pending; 120 port_id port_id; 121 port_id designated_port; 122 bridge_id designated_root; 123 bridge_id designated_bridge; 124 u32 path_cost; 125 u32 designated_cost; 126 127 struct timer_list forward_delay_timer; 128 struct timer_list hold_timer; 129 struct timer_list message_age_timer; 130 struct kobject kobj; 131 struct rcu_head rcu; 132 133 unsigned long flags; 134 #define BR_HAIRPIN_MODE 0x00000001 135 136 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 137 u32 multicast_startup_queries_sent; 138 unsigned char multicast_router; 139 struct timer_list multicast_router_timer; 140 struct timer_list multicast_query_timer; 141 struct hlist_head mglist; 142 struct hlist_node rlist; 143 #endif 144 145 #ifdef CONFIG_SYSFS 146 char sysfs_name[IFNAMSIZ]; 147 #endif 148 149 #ifdef CONFIG_NET_POLL_CONTROLLER 150 struct netpoll *np; 151 #endif 152 }; 153 154 #define br_port_get_rcu(dev) \ 155 ((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data)) 156 #define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data) 157 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 158 159 struct br_cpu_netstats { 160 u64 rx_packets; 161 u64 rx_bytes; 162 u64 tx_packets; 163 u64 tx_bytes; 164 struct u64_stats_sync syncp; 165 }; 166 167 struct net_bridge 168 { 169 spinlock_t lock; 170 struct list_head port_list; 171 struct net_device *dev; 172 173 struct br_cpu_netstats __percpu *stats; 174 spinlock_t hash_lock; 175 struct hlist_head hash[BR_HASH_SIZE]; 176 unsigned long feature_mask; 177 #ifdef CONFIG_BRIDGE_NETFILTER 178 struct rtable fake_rtable; 179 bool nf_call_iptables; 180 bool nf_call_ip6tables; 181 bool nf_call_arptables; 182 #endif 183 unsigned long flags; 184 #define BR_SET_MAC_ADDR 0x00000001 185 186 /* STP */ 187 bridge_id designated_root; 188 bridge_id bridge_id; 189 u32 root_path_cost; 190 unsigned long max_age; 191 unsigned long hello_time; 192 unsigned long forward_delay; 193 unsigned long bridge_max_age; 194 unsigned long ageing_time; 195 unsigned long bridge_hello_time; 196 unsigned long bridge_forward_delay; 197 198 u8 group_addr[ETH_ALEN]; 199 u16 root_port; 200 201 enum { 202 BR_NO_STP, /* no spanning tree */ 203 BR_KERNEL_STP, /* old STP in kernel */ 204 BR_USER_STP, /* new RSTP in userspace */ 205 } stp_enabled; 206 207 unsigned char topology_change; 208 unsigned char topology_change_detected; 209 210 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 211 unsigned char multicast_router; 212 213 u8 multicast_disabled:1; 214 215 u32 hash_elasticity; 216 u32 hash_max; 217 218 u32 multicast_last_member_count; 219 u32 multicast_startup_queries_sent; 220 u32 multicast_startup_query_count; 221 222 unsigned long multicast_last_member_interval; 223 unsigned long multicast_membership_interval; 224 unsigned long multicast_querier_interval; 225 unsigned long multicast_query_interval; 226 unsigned long multicast_query_response_interval; 227 unsigned long multicast_startup_query_interval; 228 229 spinlock_t multicast_lock; 230 struct net_bridge_mdb_htable __rcu *mdb; 231 struct hlist_head router_list; 232 struct hlist_head mglist; 233 234 struct timer_list multicast_router_timer; 235 struct timer_list multicast_querier_timer; 236 struct timer_list multicast_query_timer; 237 #endif 238 239 struct timer_list hello_timer; 240 struct timer_list tcn_timer; 241 struct timer_list topology_change_timer; 242 struct timer_list gc_timer; 243 struct kobject *ifobj; 244 }; 245 246 struct br_input_skb_cb { 247 struct net_device *brdev; 248 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 249 int igmp; 250 int mrouters_only; 251 #endif 252 }; 253 254 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 255 256 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 257 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 258 #else 259 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 260 #endif 261 262 #define br_printk(level, br, format, args...) \ 263 printk(level "%s: " format, (br)->dev->name, ##args) 264 265 #define br_err(__br, format, args...) \ 266 br_printk(KERN_ERR, __br, format, ##args) 267 #define br_warn(__br, format, args...) \ 268 br_printk(KERN_WARNING, __br, format, ##args) 269 #define br_notice(__br, format, args...) \ 270 br_printk(KERN_NOTICE, __br, format, ##args) 271 #define br_info(__br, format, args...) \ 272 br_printk(KERN_INFO, __br, format, ##args) 273 274 #define br_debug(br, format, args...) \ 275 pr_debug("%s: " format, (br)->dev->name, ##args) 276 277 extern struct notifier_block br_device_notifier; 278 extern const u8 br_group_address[ETH_ALEN]; 279 280 /* called under bridge lock */ 281 static inline int br_is_root_bridge(const struct net_bridge *br) 282 { 283 return !memcmp(&br->bridge_id, &br->designated_root, 8); 284 } 285 286 /* br_device.c */ 287 extern void br_dev_setup(struct net_device *dev); 288 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 289 struct net_device *dev); 290 #ifdef CONFIG_NET_POLL_CONTROLLER 291 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 292 { 293 return br->dev->npinfo; 294 } 295 296 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 297 struct sk_buff *skb) 298 { 299 struct netpoll *np = p->np; 300 301 if (np) 302 netpoll_send_skb(np, skb); 303 } 304 305 extern int br_netpoll_enable(struct net_bridge_port *p); 306 extern void br_netpoll_disable(struct net_bridge_port *p); 307 #else 308 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 309 { 310 return NULL; 311 } 312 313 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 314 struct sk_buff *skb) 315 { 316 } 317 318 static inline int br_netpoll_enable(struct net_bridge_port *p) 319 { 320 return 0; 321 } 322 323 static inline void br_netpoll_disable(struct net_bridge_port *p) 324 { 325 } 326 #endif 327 328 /* br_fdb.c */ 329 extern int br_fdb_init(void); 330 extern void br_fdb_fini(void); 331 extern void br_fdb_flush(struct net_bridge *br); 332 extern void br_fdb_changeaddr(struct net_bridge_port *p, 333 const unsigned char *newaddr); 334 extern void br_fdb_cleanup(unsigned long arg); 335 extern void br_fdb_delete_by_port(struct net_bridge *br, 336 const struct net_bridge_port *p, int do_all); 337 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 338 const unsigned char *addr); 339 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 340 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 341 unsigned long count, unsigned long off); 342 extern int br_fdb_insert(struct net_bridge *br, 343 struct net_bridge_port *source, 344 const unsigned char *addr); 345 extern void br_fdb_update(struct net_bridge *br, 346 struct net_bridge_port *source, 347 const unsigned char *addr); 348 349 /* br_forward.c */ 350 extern void br_deliver(const struct net_bridge_port *to, 351 struct sk_buff *skb); 352 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 353 extern void br_forward(const struct net_bridge_port *to, 354 struct sk_buff *skb, struct sk_buff *skb0); 355 extern int br_forward_finish(struct sk_buff *skb); 356 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 357 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 358 struct sk_buff *skb2); 359 360 /* br_if.c */ 361 extern void br_port_carrier_check(struct net_bridge_port *p); 362 extern int br_add_bridge(struct net *net, const char *name); 363 extern int br_del_bridge(struct net *net, const char *name); 364 extern void br_net_exit(struct net *net); 365 extern int br_add_if(struct net_bridge *br, 366 struct net_device *dev); 367 extern int br_del_if(struct net_bridge *br, 368 struct net_device *dev); 369 extern int br_min_mtu(const struct net_bridge *br); 370 extern void br_features_recompute(struct net_bridge *br); 371 372 /* br_input.c */ 373 extern int br_handle_frame_finish(struct sk_buff *skb); 374 extern struct sk_buff *br_handle_frame(struct sk_buff *skb); 375 376 /* br_ioctl.c */ 377 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 378 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 379 380 /* br_multicast.c */ 381 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 382 extern int br_multicast_rcv(struct net_bridge *br, 383 struct net_bridge_port *port, 384 struct sk_buff *skb); 385 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 386 struct sk_buff *skb); 387 extern void br_multicast_add_port(struct net_bridge_port *port); 388 extern void br_multicast_del_port(struct net_bridge_port *port); 389 extern void br_multicast_enable_port(struct net_bridge_port *port); 390 extern void br_multicast_disable_port(struct net_bridge_port *port); 391 extern void br_multicast_init(struct net_bridge *br); 392 extern void br_multicast_open(struct net_bridge *br); 393 extern void br_multicast_stop(struct net_bridge *br); 394 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 395 struct sk_buff *skb); 396 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 397 struct sk_buff *skb, struct sk_buff *skb2); 398 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 399 extern int br_multicast_set_port_router(struct net_bridge_port *p, 400 unsigned long val); 401 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 402 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 403 404 static inline bool br_multicast_is_router(struct net_bridge *br) 405 { 406 return br->multicast_router == 2 || 407 (br->multicast_router == 1 && 408 timer_pending(&br->multicast_router_timer)); 409 } 410 #else 411 static inline int br_multicast_rcv(struct net_bridge *br, 412 struct net_bridge_port *port, 413 struct sk_buff *skb) 414 { 415 return 0; 416 } 417 418 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 419 struct sk_buff *skb) 420 { 421 return NULL; 422 } 423 424 static inline void br_multicast_add_port(struct net_bridge_port *port) 425 { 426 } 427 428 static inline void br_multicast_del_port(struct net_bridge_port *port) 429 { 430 } 431 432 static inline void br_multicast_enable_port(struct net_bridge_port *port) 433 { 434 } 435 436 static inline void br_multicast_disable_port(struct net_bridge_port *port) 437 { 438 } 439 440 static inline void br_multicast_init(struct net_bridge *br) 441 { 442 } 443 444 static inline void br_multicast_open(struct net_bridge *br) 445 { 446 } 447 448 static inline void br_multicast_stop(struct net_bridge *br) 449 { 450 } 451 452 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 453 struct sk_buff *skb) 454 { 455 } 456 457 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 458 struct sk_buff *skb, 459 struct sk_buff *skb2) 460 { 461 } 462 static inline bool br_multicast_is_router(struct net_bridge *br) 463 { 464 return 0; 465 } 466 #endif 467 468 /* br_netfilter.c */ 469 #ifdef CONFIG_BRIDGE_NETFILTER 470 extern int br_netfilter_init(void); 471 extern void br_netfilter_fini(void); 472 extern void br_netfilter_rtable_init(struct net_bridge *); 473 #else 474 #define br_netfilter_init() (0) 475 #define br_netfilter_fini() do { } while(0) 476 #define br_netfilter_rtable_init(x) 477 #endif 478 479 /* br_stp.c */ 480 extern void br_log_state(const struct net_bridge_port *p); 481 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 482 u16 port_no); 483 extern void br_init_port(struct net_bridge_port *p); 484 extern void br_become_designated_port(struct net_bridge_port *p); 485 486 /* br_stp_if.c */ 487 extern void br_stp_enable_bridge(struct net_bridge *br); 488 extern void br_stp_disable_bridge(struct net_bridge *br); 489 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 490 extern void br_stp_enable_port(struct net_bridge_port *p); 491 extern void br_stp_disable_port(struct net_bridge_port *p); 492 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 493 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 494 extern void br_stp_set_bridge_priority(struct net_bridge *br, 495 u16 newprio); 496 extern void br_stp_set_port_priority(struct net_bridge_port *p, 497 u8 newprio); 498 extern void br_stp_set_path_cost(struct net_bridge_port *p, 499 u32 path_cost); 500 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 501 502 /* br_stp_bpdu.c */ 503 struct stp_proto; 504 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 505 struct net_device *dev); 506 507 /* br_stp_timer.c */ 508 extern void br_stp_timer_init(struct net_bridge *br); 509 extern void br_stp_port_timer_init(struct net_bridge_port *p); 510 extern unsigned long br_timer_value(const struct timer_list *timer); 511 512 /* br.c */ 513 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 514 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 515 #endif 516 517 /* br_netlink.c */ 518 extern int br_netlink_init(void); 519 extern void br_netlink_fini(void); 520 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 521 522 #ifdef CONFIG_SYSFS 523 /* br_sysfs_if.c */ 524 extern const struct sysfs_ops brport_sysfs_ops; 525 extern int br_sysfs_addif(struct net_bridge_port *p); 526 extern int br_sysfs_renameif(struct net_bridge_port *p); 527 528 /* br_sysfs_br.c */ 529 extern int br_sysfs_addbr(struct net_device *dev); 530 extern void br_sysfs_delbr(struct net_device *dev); 531 532 #else 533 534 #define br_sysfs_addif(p) (0) 535 #define br_sysfs_renameif(p) (0) 536 #define br_sysfs_addbr(dev) (0) 537 #define br_sysfs_delbr(dev) do { } while(0) 538 #endif /* CONFIG_SYSFS */ 539 540 #endif 541