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 br_cpu_netstats { 134 unsigned long rx_packets; 135 unsigned long rx_bytes; 136 unsigned long tx_packets; 137 unsigned long tx_bytes; 138 }; 139 140 struct net_bridge 141 { 142 spinlock_t lock; 143 struct list_head port_list; 144 struct net_device *dev; 145 146 struct br_cpu_netstats __percpu *stats; 147 spinlock_t hash_lock; 148 struct hlist_head hash[BR_HASH_SIZE]; 149 unsigned long feature_mask; 150 #ifdef CONFIG_BRIDGE_NETFILTER 151 struct rtable fake_rtable; 152 #endif 153 unsigned long flags; 154 #define BR_SET_MAC_ADDR 0x00000001 155 156 /* STP */ 157 bridge_id designated_root; 158 bridge_id bridge_id; 159 u32 root_path_cost; 160 unsigned long max_age; 161 unsigned long hello_time; 162 unsigned long forward_delay; 163 unsigned long bridge_max_age; 164 unsigned long ageing_time; 165 unsigned long bridge_hello_time; 166 unsigned long bridge_forward_delay; 167 168 u8 group_addr[ETH_ALEN]; 169 u16 root_port; 170 171 enum { 172 BR_NO_STP, /* no spanning tree */ 173 BR_KERNEL_STP, /* old STP in kernel */ 174 BR_USER_STP, /* new RSTP in userspace */ 175 } stp_enabled; 176 177 unsigned char topology_change; 178 unsigned char topology_change_detected; 179 180 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 181 unsigned char multicast_router; 182 183 u8 multicast_disabled:1; 184 185 u32 hash_elasticity; 186 u32 hash_max; 187 188 u32 multicast_last_member_count; 189 u32 multicast_startup_queries_sent; 190 u32 multicast_startup_query_count; 191 192 unsigned long multicast_last_member_interval; 193 unsigned long multicast_membership_interval; 194 unsigned long multicast_querier_interval; 195 unsigned long multicast_query_interval; 196 unsigned long multicast_query_response_interval; 197 unsigned long multicast_startup_query_interval; 198 199 spinlock_t multicast_lock; 200 struct net_bridge_mdb_htable *mdb; 201 struct hlist_head router_list; 202 struct hlist_head mglist; 203 204 struct timer_list multicast_router_timer; 205 struct timer_list multicast_querier_timer; 206 struct timer_list multicast_query_timer; 207 #endif 208 209 struct timer_list hello_timer; 210 struct timer_list tcn_timer; 211 struct timer_list topology_change_timer; 212 struct timer_list gc_timer; 213 struct kobject *ifobj; 214 }; 215 216 struct br_input_skb_cb { 217 struct net_device *brdev; 218 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 219 int igmp; 220 int mrouters_only; 221 #endif 222 }; 223 224 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 225 226 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 227 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 228 #else 229 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 230 #endif 231 232 extern struct notifier_block br_device_notifier; 233 extern const u8 br_group_address[ETH_ALEN]; 234 235 /* called under bridge lock */ 236 static inline int br_is_root_bridge(const struct net_bridge *br) 237 { 238 return !memcmp(&br->bridge_id, &br->designated_root, 8); 239 } 240 241 /* br_device.c */ 242 extern void br_dev_setup(struct net_device *dev); 243 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 244 struct net_device *dev); 245 246 /* br_fdb.c */ 247 extern int br_fdb_init(void); 248 extern void br_fdb_fini(void); 249 extern void br_fdb_flush(struct net_bridge *br); 250 extern void br_fdb_changeaddr(struct net_bridge_port *p, 251 const unsigned char *newaddr); 252 extern void br_fdb_cleanup(unsigned long arg); 253 extern void br_fdb_delete_by_port(struct net_bridge *br, 254 const struct net_bridge_port *p, int do_all); 255 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 256 const unsigned char *addr); 257 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 258 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 259 unsigned long count, unsigned long off); 260 extern int br_fdb_insert(struct net_bridge *br, 261 struct net_bridge_port *source, 262 const unsigned char *addr); 263 extern void br_fdb_update(struct net_bridge *br, 264 struct net_bridge_port *source, 265 const unsigned char *addr); 266 267 /* br_forward.c */ 268 extern void br_deliver(const struct net_bridge_port *to, 269 struct sk_buff *skb); 270 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 271 extern void br_forward(const struct net_bridge_port *to, 272 struct sk_buff *skb, struct sk_buff *skb0); 273 extern int br_forward_finish(struct sk_buff *skb); 274 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 275 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 276 struct sk_buff *skb2); 277 278 /* br_if.c */ 279 extern void br_port_carrier_check(struct net_bridge_port *p); 280 extern int br_add_bridge(struct net *net, const char *name); 281 extern int br_del_bridge(struct net *net, const char *name); 282 extern void br_net_exit(struct net *net); 283 extern int br_add_if(struct net_bridge *br, 284 struct net_device *dev); 285 extern int br_del_if(struct net_bridge *br, 286 struct net_device *dev); 287 extern int br_min_mtu(const struct net_bridge *br); 288 extern void br_features_recompute(struct net_bridge *br); 289 290 /* br_input.c */ 291 extern int br_handle_frame_finish(struct sk_buff *skb); 292 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 293 struct sk_buff *skb); 294 295 /* br_ioctl.c */ 296 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 297 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 298 299 /* br_multicast.c */ 300 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 301 extern int br_multicast_rcv(struct net_bridge *br, 302 struct net_bridge_port *port, 303 struct sk_buff *skb); 304 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 305 struct sk_buff *skb); 306 extern void br_multicast_add_port(struct net_bridge_port *port); 307 extern void br_multicast_del_port(struct net_bridge_port *port); 308 extern void br_multicast_enable_port(struct net_bridge_port *port); 309 extern void br_multicast_disable_port(struct net_bridge_port *port); 310 extern void br_multicast_init(struct net_bridge *br); 311 extern void br_multicast_open(struct net_bridge *br); 312 extern void br_multicast_stop(struct net_bridge *br); 313 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 314 struct sk_buff *skb); 315 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 316 struct sk_buff *skb, struct sk_buff *skb2); 317 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 318 extern int br_multicast_set_port_router(struct net_bridge_port *p, 319 unsigned long val); 320 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 321 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 322 323 static inline bool br_multicast_is_router(struct net_bridge *br) 324 { 325 return br->multicast_router == 2 || 326 (br->multicast_router == 1 && 327 timer_pending(&br->multicast_router_timer)); 328 } 329 #else 330 static inline int br_multicast_rcv(struct net_bridge *br, 331 struct net_bridge_port *port, 332 struct sk_buff *skb) 333 { 334 return 0; 335 } 336 337 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 338 struct sk_buff *skb) 339 { 340 return NULL; 341 } 342 343 static inline void br_multicast_add_port(struct net_bridge_port *port) 344 { 345 } 346 347 static inline void br_multicast_del_port(struct net_bridge_port *port) 348 { 349 } 350 351 static inline void br_multicast_enable_port(struct net_bridge_port *port) 352 { 353 } 354 355 static inline void br_multicast_disable_port(struct net_bridge_port *port) 356 { 357 } 358 359 static inline void br_multicast_init(struct net_bridge *br) 360 { 361 } 362 363 static inline void br_multicast_open(struct net_bridge *br) 364 { 365 } 366 367 static inline void br_multicast_stop(struct net_bridge *br) 368 { 369 } 370 371 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 372 struct sk_buff *skb) 373 { 374 } 375 376 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 377 struct sk_buff *skb, 378 struct sk_buff *skb2) 379 { 380 } 381 static inline bool br_multicast_is_router(struct net_bridge *br) 382 { 383 return 0; 384 } 385 #endif 386 387 /* br_netfilter.c */ 388 #ifdef CONFIG_BRIDGE_NETFILTER 389 extern int br_netfilter_init(void); 390 extern void br_netfilter_fini(void); 391 extern void br_netfilter_rtable_init(struct net_bridge *); 392 #else 393 #define br_netfilter_init() (0) 394 #define br_netfilter_fini() do { } while(0) 395 #define br_netfilter_rtable_init(x) 396 #endif 397 398 /* br_stp.c */ 399 extern void br_log_state(const struct net_bridge_port *p); 400 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 401 u16 port_no); 402 extern void br_init_port(struct net_bridge_port *p); 403 extern void br_become_designated_port(struct net_bridge_port *p); 404 405 /* br_stp_if.c */ 406 extern void br_stp_enable_bridge(struct net_bridge *br); 407 extern void br_stp_disable_bridge(struct net_bridge *br); 408 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 409 extern void br_stp_enable_port(struct net_bridge_port *p); 410 extern void br_stp_disable_port(struct net_bridge_port *p); 411 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 412 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 413 extern void br_stp_set_bridge_priority(struct net_bridge *br, 414 u16 newprio); 415 extern void br_stp_set_port_priority(struct net_bridge_port *p, 416 u8 newprio); 417 extern void br_stp_set_path_cost(struct net_bridge_port *p, 418 u32 path_cost); 419 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 420 421 /* br_stp_bpdu.c */ 422 struct stp_proto; 423 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 424 struct net_device *dev); 425 426 /* br_stp_timer.c */ 427 extern void br_stp_timer_init(struct net_bridge *br); 428 extern void br_stp_port_timer_init(struct net_bridge_port *p); 429 extern unsigned long br_timer_value(const struct timer_list *timer); 430 431 /* br.c */ 432 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 433 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 434 #endif 435 436 /* br_netlink.c */ 437 extern int br_netlink_init(void); 438 extern void br_netlink_fini(void); 439 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 440 441 #ifdef CONFIG_SYSFS 442 /* br_sysfs_if.c */ 443 extern const struct sysfs_ops brport_sysfs_ops; 444 extern int br_sysfs_addif(struct net_bridge_port *p); 445 446 /* br_sysfs_br.c */ 447 extern int br_sysfs_addbr(struct net_device *dev); 448 extern void br_sysfs_delbr(struct net_device *dev); 449 450 #else 451 452 #define br_sysfs_addif(p) (0) 453 #define br_sysfs_addbr(dev) (0) 454 #define br_sysfs_delbr(dev) do { } while(0) 455 #endif /* CONFIG_SYSFS */ 456 457 #endif 458