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