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 #include <linux/if_vlan.h> 22 23 #define BR_HASH_BITS 8 24 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 25 26 #define BR_HOLD_TIME (1*HZ) 27 28 #define BR_PORT_BITS 10 29 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 30 #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID) 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding control protocols like STP and LLDP */ 37 #define BR_GROUPFWD_RESTRICTED 0x4007u 38 39 /* Path to usermode spanning tree program */ 40 #define BR_STP_PROG "/sbin/bridge-stp" 41 42 typedef struct bridge_id bridge_id; 43 typedef struct mac_addr mac_addr; 44 typedef __u16 port_id; 45 46 struct bridge_id 47 { 48 unsigned char prio[2]; 49 unsigned char addr[6]; 50 }; 51 52 struct mac_addr 53 { 54 unsigned char addr[6]; 55 }; 56 57 struct br_ip 58 { 59 union { 60 __be32 ip4; 61 #if IS_ENABLED(CONFIG_IPV6) 62 struct in6_addr ip6; 63 #endif 64 } u; 65 __be16 proto; 66 }; 67 68 struct net_port_vlans { 69 u16 port_idx; 70 union { 71 struct net_bridge_port *port; 72 struct net_bridge *br; 73 } parent; 74 struct rcu_head rcu; 75 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 76 u16 num_vlans; 77 }; 78 79 struct net_bridge_fdb_entry 80 { 81 struct hlist_node hlist; 82 struct net_bridge_port *dst; 83 84 struct rcu_head rcu; 85 unsigned long updated; 86 unsigned long used; 87 mac_addr addr; 88 unsigned char is_local; 89 unsigned char is_static; 90 }; 91 92 struct net_bridge_port_group { 93 struct net_bridge_port *port; 94 struct net_bridge_port_group __rcu *next; 95 struct hlist_node mglist; 96 struct rcu_head rcu; 97 struct timer_list timer; 98 struct br_ip addr; 99 unsigned char state; 100 }; 101 102 struct net_bridge_mdb_entry 103 { 104 struct hlist_node hlist[2]; 105 struct net_bridge *br; 106 struct net_bridge_port_group __rcu *ports; 107 struct rcu_head rcu; 108 struct timer_list timer; 109 struct br_ip addr; 110 bool mglist; 111 }; 112 113 struct net_bridge_mdb_htable 114 { 115 struct hlist_head *mhash; 116 struct rcu_head rcu; 117 struct net_bridge_mdb_htable *old; 118 u32 size; 119 u32 max; 120 u32 secret; 121 u32 ver; 122 }; 123 124 struct net_bridge_port 125 { 126 struct net_bridge *br; 127 struct net_device *dev; 128 struct list_head list; 129 130 /* STP */ 131 u8 priority; 132 u8 state; 133 u16 port_no; 134 unsigned char topology_change_ack; 135 unsigned char config_pending; 136 port_id port_id; 137 port_id designated_port; 138 bridge_id designated_root; 139 bridge_id designated_bridge; 140 u32 path_cost; 141 u32 designated_cost; 142 unsigned long designated_age; 143 144 struct timer_list forward_delay_timer; 145 struct timer_list hold_timer; 146 struct timer_list message_age_timer; 147 struct kobject kobj; 148 struct rcu_head rcu; 149 150 unsigned long flags; 151 #define BR_HAIRPIN_MODE 0x00000001 152 #define BR_BPDU_GUARD 0x00000002 153 #define BR_ROOT_BLOCK 0x00000004 154 #define BR_MULTICAST_FAST_LEAVE 0x00000008 155 156 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 157 u32 multicast_startup_queries_sent; 158 unsigned char multicast_router; 159 struct timer_list multicast_router_timer; 160 struct timer_list multicast_query_timer; 161 struct hlist_head mglist; 162 struct hlist_node rlist; 163 #endif 164 165 #ifdef CONFIG_SYSFS 166 char sysfs_name[IFNAMSIZ]; 167 #endif 168 169 #ifdef CONFIG_NET_POLL_CONTROLLER 170 struct netpoll *np; 171 #endif 172 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 173 struct net_port_vlans __rcu *vlan_info; 174 #endif 175 }; 176 177 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 178 179 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 180 { 181 struct net_bridge_port *port = 182 rcu_dereference_rtnl(dev->rx_handler_data); 183 184 return br_port_exists(dev) ? port : NULL; 185 } 186 187 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 188 { 189 return br_port_exists(dev) ? 190 rtnl_dereference(dev->rx_handler_data) : NULL; 191 } 192 193 struct br_cpu_netstats { 194 u64 rx_packets; 195 u64 rx_bytes; 196 u64 tx_packets; 197 u64 tx_bytes; 198 struct u64_stats_sync syncp; 199 }; 200 201 struct net_bridge 202 { 203 spinlock_t lock; 204 struct list_head port_list; 205 struct net_device *dev; 206 207 struct br_cpu_netstats __percpu *stats; 208 spinlock_t hash_lock; 209 struct hlist_head hash[BR_HASH_SIZE]; 210 #ifdef CONFIG_BRIDGE_NETFILTER 211 struct rtable fake_rtable; 212 bool nf_call_iptables; 213 bool nf_call_ip6tables; 214 bool nf_call_arptables; 215 #endif 216 u16 group_fwd_mask; 217 218 /* STP */ 219 bridge_id designated_root; 220 bridge_id bridge_id; 221 u32 root_path_cost; 222 unsigned long max_age; 223 unsigned long hello_time; 224 unsigned long forward_delay; 225 unsigned long bridge_max_age; 226 unsigned long ageing_time; 227 unsigned long bridge_hello_time; 228 unsigned long bridge_forward_delay; 229 230 u8 group_addr[ETH_ALEN]; 231 u16 root_port; 232 233 enum { 234 BR_NO_STP, /* no spanning tree */ 235 BR_KERNEL_STP, /* old STP in kernel */ 236 BR_USER_STP, /* new RSTP in userspace */ 237 } stp_enabled; 238 239 unsigned char topology_change; 240 unsigned char topology_change_detected; 241 242 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 243 unsigned char multicast_router; 244 245 u8 multicast_disabled:1; 246 u8 multicast_querier:1; 247 248 u32 hash_elasticity; 249 u32 hash_max; 250 251 u32 multicast_last_member_count; 252 u32 multicast_startup_queries_sent; 253 u32 multicast_startup_query_count; 254 255 unsigned long multicast_last_member_interval; 256 unsigned long multicast_membership_interval; 257 unsigned long multicast_querier_interval; 258 unsigned long multicast_query_interval; 259 unsigned long multicast_query_response_interval; 260 unsigned long multicast_startup_query_interval; 261 262 spinlock_t multicast_lock; 263 struct net_bridge_mdb_htable __rcu *mdb; 264 struct hlist_head router_list; 265 266 struct timer_list multicast_router_timer; 267 struct timer_list multicast_querier_timer; 268 struct timer_list multicast_query_timer; 269 #endif 270 271 struct timer_list hello_timer; 272 struct timer_list tcn_timer; 273 struct timer_list topology_change_timer; 274 struct timer_list gc_timer; 275 struct kobject *ifobj; 276 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 277 u8 vlan_enabled; 278 struct net_port_vlans __rcu *vlan_info; 279 #endif 280 }; 281 282 struct br_input_skb_cb { 283 struct net_device *brdev; 284 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 285 int igmp; 286 int mrouters_only; 287 #endif 288 }; 289 290 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 291 292 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 293 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 294 #else 295 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 296 #endif 297 298 #define br_printk(level, br, format, args...) \ 299 printk(level "%s: " format, (br)->dev->name, ##args) 300 301 #define br_err(__br, format, args...) \ 302 br_printk(KERN_ERR, __br, format, ##args) 303 #define br_warn(__br, format, args...) \ 304 br_printk(KERN_WARNING, __br, format, ##args) 305 #define br_notice(__br, format, args...) \ 306 br_printk(KERN_NOTICE, __br, format, ##args) 307 #define br_info(__br, format, args...) \ 308 br_printk(KERN_INFO, __br, format, ##args) 309 310 #define br_debug(br, format, args...) \ 311 pr_debug("%s: " format, (br)->dev->name, ##args) 312 313 extern struct notifier_block br_device_notifier; 314 315 /* called under bridge lock */ 316 static inline int br_is_root_bridge(const struct net_bridge *br) 317 { 318 return !memcmp(&br->bridge_id, &br->designated_root, 8); 319 } 320 321 /* br_device.c */ 322 extern void br_dev_setup(struct net_device *dev); 323 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 324 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 325 struct net_device *dev); 326 #ifdef CONFIG_NET_POLL_CONTROLLER 327 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 328 { 329 return br->dev->npinfo; 330 } 331 332 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 333 struct sk_buff *skb) 334 { 335 struct netpoll *np = p->np; 336 337 if (np) 338 netpoll_send_skb(np, skb); 339 } 340 341 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 342 extern void br_netpoll_disable(struct net_bridge_port *p); 343 #else 344 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 345 { 346 return NULL; 347 } 348 349 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 350 struct sk_buff *skb) 351 { 352 } 353 354 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 355 { 356 return 0; 357 } 358 359 static inline void br_netpoll_disable(struct net_bridge_port *p) 360 { 361 } 362 #endif 363 364 /* br_fdb.c */ 365 extern int br_fdb_init(void); 366 extern void br_fdb_fini(void); 367 extern void br_fdb_flush(struct net_bridge *br); 368 extern void br_fdb_changeaddr(struct net_bridge_port *p, 369 const unsigned char *newaddr); 370 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 371 extern void br_fdb_cleanup(unsigned long arg); 372 extern void br_fdb_delete_by_port(struct net_bridge *br, 373 const struct net_bridge_port *p, int do_all); 374 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 375 const unsigned char *addr); 376 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 377 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 378 unsigned long count, unsigned long off); 379 extern int br_fdb_insert(struct net_bridge *br, 380 struct net_bridge_port *source, 381 const unsigned char *addr); 382 extern void br_fdb_update(struct net_bridge *br, 383 struct net_bridge_port *source, 384 const unsigned char *addr); 385 386 extern int br_fdb_delete(struct ndmsg *ndm, 387 struct net_device *dev, 388 const unsigned char *addr); 389 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 390 struct net_device *dev, 391 const unsigned char *addr, 392 u16 nlh_flags); 393 extern int br_fdb_dump(struct sk_buff *skb, 394 struct netlink_callback *cb, 395 struct net_device *dev, 396 int idx); 397 398 /* br_forward.c */ 399 extern void br_deliver(const struct net_bridge_port *to, 400 struct sk_buff *skb); 401 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 402 extern void br_forward(const struct net_bridge_port *to, 403 struct sk_buff *skb, struct sk_buff *skb0); 404 extern int br_forward_finish(struct sk_buff *skb); 405 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 406 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 407 struct sk_buff *skb2); 408 409 /* br_if.c */ 410 extern void br_port_carrier_check(struct net_bridge_port *p); 411 extern int br_add_bridge(struct net *net, const char *name); 412 extern int br_del_bridge(struct net *net, const char *name); 413 extern void br_net_exit(struct net *net); 414 extern int br_add_if(struct net_bridge *br, 415 struct net_device *dev); 416 extern int br_del_if(struct net_bridge *br, 417 struct net_device *dev); 418 extern int br_min_mtu(const struct net_bridge *br); 419 extern netdev_features_t br_features_recompute(struct net_bridge *br, 420 netdev_features_t features); 421 422 /* br_input.c */ 423 extern int br_handle_frame_finish(struct sk_buff *skb); 424 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 425 426 /* br_ioctl.c */ 427 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 428 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 429 430 /* br_multicast.c */ 431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 432 extern unsigned int br_mdb_rehash_seq; 433 extern int br_multicast_rcv(struct net_bridge *br, 434 struct net_bridge_port *port, 435 struct sk_buff *skb); 436 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 437 struct sk_buff *skb); 438 extern void br_multicast_add_port(struct net_bridge_port *port); 439 extern void br_multicast_del_port(struct net_bridge_port *port); 440 extern void br_multicast_enable_port(struct net_bridge_port *port); 441 extern void br_multicast_disable_port(struct net_bridge_port *port); 442 extern void br_multicast_init(struct net_bridge *br); 443 extern void br_multicast_open(struct net_bridge *br); 444 extern void br_multicast_stop(struct net_bridge *br); 445 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 446 struct sk_buff *skb); 447 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 448 struct sk_buff *skb, struct sk_buff *skb2); 449 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 450 extern int br_multicast_set_port_router(struct net_bridge_port *p, 451 unsigned long val); 452 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 453 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 454 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 455 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 456 struct net_bridge_mdb_htable *mdb, 457 struct br_ip *dst); 458 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 459 struct net_bridge_port *port, struct br_ip *group); 460 extern void br_multicast_free_pg(struct rcu_head *head); 461 extern struct net_bridge_port_group *br_multicast_new_port_group( 462 struct net_bridge_port *port, 463 struct br_ip *group, 464 struct net_bridge_port_group *next, 465 unsigned char state); 466 extern void br_mdb_init(void); 467 extern void br_mdb_uninit(void); 468 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 469 struct br_ip *group, int type); 470 471 #define mlock_dereference(X, br) \ 472 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 473 474 #if IS_ENABLED(CONFIG_IPV6) 475 #include <net/addrconf.h> 476 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 477 { 478 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 479 return 1; 480 return 0; 481 } 482 #endif 483 484 static inline bool br_multicast_is_router(struct net_bridge *br) 485 { 486 return br->multicast_router == 2 || 487 (br->multicast_router == 1 && 488 timer_pending(&br->multicast_router_timer)); 489 } 490 #else 491 static inline int br_multicast_rcv(struct net_bridge *br, 492 struct net_bridge_port *port, 493 struct sk_buff *skb) 494 { 495 return 0; 496 } 497 498 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 499 struct sk_buff *skb) 500 { 501 return NULL; 502 } 503 504 static inline void br_multicast_add_port(struct net_bridge_port *port) 505 { 506 } 507 508 static inline void br_multicast_del_port(struct net_bridge_port *port) 509 { 510 } 511 512 static inline void br_multicast_enable_port(struct net_bridge_port *port) 513 { 514 } 515 516 static inline void br_multicast_disable_port(struct net_bridge_port *port) 517 { 518 } 519 520 static inline void br_multicast_init(struct net_bridge *br) 521 { 522 } 523 524 static inline void br_multicast_open(struct net_bridge *br) 525 { 526 } 527 528 static inline void br_multicast_stop(struct net_bridge *br) 529 { 530 } 531 532 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 533 struct sk_buff *skb) 534 { 535 } 536 537 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 538 struct sk_buff *skb, 539 struct sk_buff *skb2) 540 { 541 } 542 static inline bool br_multicast_is_router(struct net_bridge *br) 543 { 544 return 0; 545 } 546 static inline void br_mdb_init(void) 547 { 548 } 549 static inline void br_mdb_uninit(void) 550 { 551 } 552 #endif 553 554 /* br_vlan.c */ 555 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 556 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 557 struct sk_buff *skb); 558 extern bool br_allowed_egress(struct net_bridge *br, 559 const struct net_port_vlans *v, 560 const struct sk_buff *skb); 561 extern int br_vlan_add(struct net_bridge *br, u16 vid); 562 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 563 extern void br_vlan_flush(struct net_bridge *br); 564 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 565 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid); 566 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 567 extern void nbp_vlan_flush(struct net_bridge_port *port); 568 569 static inline struct net_port_vlans *br_get_vlan_info( 570 const struct net_bridge *br) 571 { 572 return rcu_dereference(br->vlan_info); 573 } 574 575 static inline struct net_port_vlans *nbp_get_vlan_info( 576 const struct net_bridge_port *p) 577 { 578 return rcu_dereference(p->vlan_info); 579 } 580 581 /* Since bridge now depends on 8021Q module, but the time bridge sees the 582 * skb, the vlan tag will always be present if the frame was tagged. 583 */ 584 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 585 { 586 int err = 0; 587 588 if (vlan_tx_tag_present(skb)) 589 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 590 else { 591 *vid = 0; 592 err = -EINVAL; 593 } 594 595 return err; 596 } 597 #else 598 static inline bool br_allowed_ingress(struct net_bridge *br, 599 struct net_port_vlans *v, 600 struct sk_buff *skb) 601 { 602 return true; 603 } 604 605 static inline bool br_allowed_egress(struct net_bridge *br, 606 const struct net_port_vlans *v, 607 const struct sk_buff *skb) 608 { 609 return true; 610 } 611 612 static inline int br_vlan_add(struct net_bridge *br, u16 vid) 613 { 614 return -EOPNOTSUPP; 615 } 616 617 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 618 { 619 return -EOPNOTSUPP; 620 } 621 622 static inline void br_vlan_flush(struct net_bridge *br) 623 { 624 } 625 626 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid) 627 { 628 return -EOPNOTSUPP; 629 } 630 631 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 632 { 633 return -EOPNOTSUPP; 634 } 635 636 static inline void nbp_vlan_flush(struct net_bridge_port *port) 637 { 638 } 639 640 static inline struct net_port_vlans *br_get_vlan_info( 641 const struct net_bridge *br) 642 { 643 return NULL; 644 } 645 static inline struct net_port_vlans *nbp_get_vlan_info( 646 const struct net_bridge_port *p) 647 { 648 return NULL; 649 } 650 651 static inline u16 br_vlan_get_tag(const struct sk_buff *skb) 652 { 653 return 0; 654 } 655 #endif 656 657 /* br_netfilter.c */ 658 #ifdef CONFIG_BRIDGE_NETFILTER 659 extern int br_netfilter_init(void); 660 extern void br_netfilter_fini(void); 661 extern void br_netfilter_rtable_init(struct net_bridge *); 662 #else 663 #define br_netfilter_init() (0) 664 #define br_netfilter_fini() do { } while(0) 665 #define br_netfilter_rtable_init(x) 666 #endif 667 668 /* br_stp.c */ 669 extern void br_log_state(const struct net_bridge_port *p); 670 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 671 u16 port_no); 672 extern void br_init_port(struct net_bridge_port *p); 673 extern void br_become_designated_port(struct net_bridge_port *p); 674 675 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 676 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 677 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 678 679 680 /* br_stp_if.c */ 681 extern void br_stp_enable_bridge(struct net_bridge *br); 682 extern void br_stp_disable_bridge(struct net_bridge *br); 683 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 684 extern void br_stp_enable_port(struct net_bridge_port *p); 685 extern void br_stp_disable_port(struct net_bridge_port *p); 686 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 687 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 688 extern void br_stp_set_bridge_priority(struct net_bridge *br, 689 u16 newprio); 690 extern int br_stp_set_port_priority(struct net_bridge_port *p, 691 unsigned long newprio); 692 extern int br_stp_set_path_cost(struct net_bridge_port *p, 693 unsigned long path_cost); 694 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 695 696 /* br_stp_bpdu.c */ 697 struct stp_proto; 698 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 699 struct net_device *dev); 700 701 /* br_stp_timer.c */ 702 extern void br_stp_timer_init(struct net_bridge *br); 703 extern void br_stp_port_timer_init(struct net_bridge_port *p); 704 extern unsigned long br_timer_value(const struct timer_list *timer); 705 706 /* br.c */ 707 #if IS_ENABLED(CONFIG_ATM_LANE) 708 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 709 #endif 710 711 /* br_netlink.c */ 712 extern struct rtnl_link_ops br_link_ops; 713 extern int br_netlink_init(void); 714 extern void br_netlink_fini(void); 715 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 716 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 717 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 718 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 719 struct net_device *dev, u32 filter_mask); 720 721 #ifdef CONFIG_SYSFS 722 /* br_sysfs_if.c */ 723 extern const struct sysfs_ops brport_sysfs_ops; 724 extern int br_sysfs_addif(struct net_bridge_port *p); 725 extern int br_sysfs_renameif(struct net_bridge_port *p); 726 727 /* br_sysfs_br.c */ 728 extern int br_sysfs_addbr(struct net_device *dev); 729 extern void br_sysfs_delbr(struct net_device *dev); 730 731 #else 732 733 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 734 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 735 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 736 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 737 #endif /* CONFIG_SYSFS */ 738 739 #endif 740