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 }; 143 144 struct br_cpu_netstats { 145 unsigned long rx_packets; 146 unsigned long rx_bytes; 147 unsigned long tx_packets; 148 unsigned long tx_bytes; 149 }; 150 151 struct net_bridge 152 { 153 spinlock_t lock; 154 struct list_head port_list; 155 struct net_device *dev; 156 157 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; 163 #endif 164 unsigned long flags; 165 #define BR_SET_MAC_ADDR 0x00000001 166 167 /* STP */ 168 bridge_id designated_root; 169 bridge_id bridge_id; 170 u32 root_path_cost; 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; 178 179 u8 group_addr[ETH_ALEN]; 180 u16 root_port; 181 182 enum { 183 BR_NO_STP, /* no spanning tree */ 184 BR_KERNEL_STP, /* old STP in kernel */ 185 BR_USER_STP, /* new RSTP in userspace */ 186 } stp_enabled; 187 188 unsigned char topology_change; 189 unsigned char topology_change_detected; 190 191 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 192 unsigned char multicast_router; 193 194 u8 multicast_disabled:1; 195 196 u32 hash_elasticity; 197 u32 hash_max; 198 199 u32 multicast_last_member_count; 200 u32 multicast_startup_queries_sent; 201 u32 multicast_startup_query_count; 202 203 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; 209 210 spinlock_t multicast_lock; 211 struct net_bridge_mdb_htable *mdb; 212 struct hlist_head router_list; 213 struct hlist_head mglist; 214 215 struct timer_list multicast_router_timer; 216 struct timer_list multicast_querier_timer; 217 struct timer_list multicast_query_timer; 218 #endif 219 220 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; 225 }; 226 227 struct br_input_skb_cb { 228 struct net_device *brdev; 229 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 230 int igmp; 231 int mrouters_only; 232 #endif 233 }; 234 235 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 236 237 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 238 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 239 #else 240 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 241 #endif 242 243 extern struct notifier_block br_device_notifier; 244 extern const u8 br_group_address[ETH_ALEN]; 245 246 /* called under bridge lock */ 247 static inline int br_is_root_bridge(const struct net_bridge *br) 248 { 249 return !memcmp(&br->bridge_id, &br->designated_root, 8); 250 } 251 252 /* br_device.c */ 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); 262 #else 263 #define br_netpoll_cleanup(br) 264 #define br_netpoll_enable(br, dev) 265 #define br_netpoll_disable(br, dev) 266 267 #endif 268 269 /* br_fdb.c */ 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); 289 290 /* br_forward.c */ 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); 300 301 /* br_if.c */ 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); 312 313 /* br_input.c */ 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); 317 318 /* br_ioctl.c */ 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); 321 322 /* br_multicast.c */ 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, 342 unsigned long val); 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); 345 346 static inline bool br_multicast_is_router(struct net_bridge *br) 347 { 348 return br->multicast_router == 2 || 349 (br->multicast_router == 1 && 350 timer_pending(&br->multicast_router_timer)); 351 } 352 #else 353 static inline int br_multicast_rcv(struct net_bridge *br, 354 struct net_bridge_port *port, 355 struct sk_buff *skb) 356 { 357 return 0; 358 } 359 360 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 361 struct sk_buff *skb) 362 { 363 return NULL; 364 } 365 366 static inline void br_multicast_add_port(struct net_bridge_port *port) 367 { 368 } 369 370 static inline void br_multicast_del_port(struct net_bridge_port *port) 371 { 372 } 373 374 static inline void br_multicast_enable_port(struct net_bridge_port *port) 375 { 376 } 377 378 static inline void br_multicast_disable_port(struct net_bridge_port *port) 379 { 380 } 381 382 static inline void br_multicast_init(struct net_bridge *br) 383 { 384 } 385 386 static inline void br_multicast_open(struct net_bridge *br) 387 { 388 } 389 390 static inline void br_multicast_stop(struct net_bridge *br) 391 { 392 } 393 394 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 395 struct sk_buff *skb) 396 { 397 } 398 399 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 400 struct sk_buff *skb, 401 struct sk_buff *skb2) 402 { 403 } 404 static inline bool br_multicast_is_router(struct net_bridge *br) 405 { 406 return 0; 407 } 408 #endif 409 410 /* br_netfilter.c */ 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 *); 415 #else 416 #define br_netfilter_init() (0) 417 #define br_netfilter_fini() do { } while(0) 418 #define br_netfilter_rtable_init(x) 419 #endif 420 421 /* br_stp.c */ 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, 424 u16 port_no); 425 extern void br_init_port(struct net_bridge_port *p); 426 extern void br_become_designated_port(struct net_bridge_port *p); 427 428 /* br_stp_if.c */ 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, 437 u16 newprio); 438 extern void br_stp_set_port_priority(struct net_bridge_port *p, 439 u8 newprio); 440 extern void br_stp_set_path_cost(struct net_bridge_port *p, 441 u32 path_cost); 442 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 443 444 /* br_stp_bpdu.c */ 445 struct stp_proto; 446 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 447 struct net_device *dev); 448 449 /* br_stp_timer.c */ 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); 453 454 /* br.c */ 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); 457 #endif 458 459 /* br_netlink.c */ 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); 463 464 #ifdef CONFIG_SYSFS 465 /* br_sysfs_if.c */ 466 extern const struct sysfs_ops brport_sysfs_ops; 467 extern int br_sysfs_addif(struct net_bridge_port *p); 468 469 /* br_sysfs_br.c */ 470 extern int br_sysfs_addbr(struct net_device *dev); 471 extern void br_sysfs_delbr(struct net_device *dev); 472 473 #else 474 475 #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 */ 479 480 #endif 481