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 __u16 vid; 67 }; 68 69 struct net_port_vlans { 70 u16 port_idx; 71 u16 pvid; 72 union { 73 struct net_bridge_port *port; 74 struct net_bridge *br; 75 } parent; 76 struct rcu_head rcu; 77 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 78 u16 num_vlans; 79 }; 80 81 struct net_bridge_fdb_entry 82 { 83 struct hlist_node hlist; 84 struct net_bridge_port *dst; 85 86 struct rcu_head rcu; 87 unsigned long updated; 88 unsigned long used; 89 mac_addr addr; 90 unsigned char is_local; 91 unsigned char is_static; 92 __u16 vlan_id; 93 }; 94 95 struct net_bridge_port_group { 96 struct net_bridge_port *port; 97 struct net_bridge_port_group __rcu *next; 98 struct hlist_node mglist; 99 struct rcu_head rcu; 100 struct timer_list timer; 101 struct br_ip addr; 102 unsigned char state; 103 }; 104 105 struct net_bridge_mdb_entry 106 { 107 struct hlist_node hlist[2]; 108 struct net_bridge *br; 109 struct net_bridge_port_group __rcu *ports; 110 struct rcu_head rcu; 111 struct timer_list timer; 112 struct br_ip addr; 113 bool mglist; 114 }; 115 116 struct net_bridge_mdb_htable 117 { 118 struct hlist_head *mhash; 119 struct rcu_head rcu; 120 struct net_bridge_mdb_htable *old; 121 u32 size; 122 u32 max; 123 u32 secret; 124 u32 ver; 125 }; 126 127 struct net_bridge_port 128 { 129 struct net_bridge *br; 130 struct net_device *dev; 131 struct list_head list; 132 133 /* STP */ 134 u8 priority; 135 u8 state; 136 u16 port_no; 137 unsigned char topology_change_ack; 138 unsigned char config_pending; 139 port_id port_id; 140 port_id designated_port; 141 bridge_id designated_root; 142 bridge_id designated_bridge; 143 u32 path_cost; 144 u32 designated_cost; 145 unsigned long designated_age; 146 147 struct timer_list forward_delay_timer; 148 struct timer_list hold_timer; 149 struct timer_list message_age_timer; 150 struct kobject kobj; 151 struct rcu_head rcu; 152 153 unsigned long flags; 154 #define BR_HAIRPIN_MODE 0x00000001 155 #define BR_BPDU_GUARD 0x00000002 156 #define BR_ROOT_BLOCK 0x00000004 157 #define BR_MULTICAST_FAST_LEAVE 0x00000008 158 159 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 160 u32 multicast_startup_queries_sent; 161 unsigned char multicast_router; 162 struct timer_list multicast_router_timer; 163 struct timer_list multicast_query_timer; 164 struct hlist_head mglist; 165 struct hlist_node rlist; 166 #endif 167 168 #ifdef CONFIG_SYSFS 169 char sysfs_name[IFNAMSIZ]; 170 #endif 171 172 #ifdef CONFIG_NET_POLL_CONTROLLER 173 struct netpoll *np; 174 #endif 175 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 176 struct net_port_vlans __rcu *vlan_info; 177 #endif 178 }; 179 180 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 181 182 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 183 { 184 struct net_bridge_port *port = 185 rcu_dereference_rtnl(dev->rx_handler_data); 186 187 return br_port_exists(dev) ? port : NULL; 188 } 189 190 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 191 { 192 return br_port_exists(dev) ? 193 rtnl_dereference(dev->rx_handler_data) : NULL; 194 } 195 196 struct br_cpu_netstats { 197 u64 rx_packets; 198 u64 rx_bytes; 199 u64 tx_packets; 200 u64 tx_bytes; 201 struct u64_stats_sync syncp; 202 }; 203 204 struct net_bridge 205 { 206 spinlock_t lock; 207 struct list_head port_list; 208 struct net_device *dev; 209 210 struct br_cpu_netstats __percpu *stats; 211 spinlock_t hash_lock; 212 struct hlist_head hash[BR_HASH_SIZE]; 213 #ifdef CONFIG_BRIDGE_NETFILTER 214 struct rtable fake_rtable; 215 bool nf_call_iptables; 216 bool nf_call_ip6tables; 217 bool nf_call_arptables; 218 #endif 219 u16 group_fwd_mask; 220 221 /* STP */ 222 bridge_id designated_root; 223 bridge_id bridge_id; 224 u32 root_path_cost; 225 unsigned long max_age; 226 unsigned long hello_time; 227 unsigned long forward_delay; 228 unsigned long bridge_max_age; 229 unsigned long ageing_time; 230 unsigned long bridge_hello_time; 231 unsigned long bridge_forward_delay; 232 233 u8 group_addr[ETH_ALEN]; 234 u16 root_port; 235 236 enum { 237 BR_NO_STP, /* no spanning tree */ 238 BR_KERNEL_STP, /* old STP in kernel */ 239 BR_USER_STP, /* new RSTP in userspace */ 240 } stp_enabled; 241 242 unsigned char topology_change; 243 unsigned char topology_change_detected; 244 245 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 246 unsigned char multicast_router; 247 248 u8 multicast_disabled:1; 249 u8 multicast_querier:1; 250 251 u32 hash_elasticity; 252 u32 hash_max; 253 254 u32 multicast_last_member_count; 255 u32 multicast_startup_queries_sent; 256 u32 multicast_startup_query_count; 257 258 unsigned long multicast_last_member_interval; 259 unsigned long multicast_membership_interval; 260 unsigned long multicast_querier_interval; 261 unsigned long multicast_query_interval; 262 unsigned long multicast_query_response_interval; 263 unsigned long multicast_startup_query_interval; 264 265 spinlock_t multicast_lock; 266 struct net_bridge_mdb_htable __rcu *mdb; 267 struct hlist_head router_list; 268 269 struct timer_list multicast_router_timer; 270 struct timer_list multicast_querier_timer; 271 struct timer_list multicast_query_timer; 272 #endif 273 274 struct timer_list hello_timer; 275 struct timer_list tcn_timer; 276 struct timer_list topology_change_timer; 277 struct timer_list gc_timer; 278 struct kobject *ifobj; 279 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 280 u8 vlan_enabled; 281 struct net_port_vlans __rcu *vlan_info; 282 #endif 283 }; 284 285 struct br_input_skb_cb { 286 struct net_device *brdev; 287 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 288 int igmp; 289 int mrouters_only; 290 #endif 291 }; 292 293 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 294 295 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 296 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 297 #else 298 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 299 #endif 300 301 #define br_printk(level, br, format, args...) \ 302 printk(level "%s: " format, (br)->dev->name, ##args) 303 304 #define br_err(__br, format, args...) \ 305 br_printk(KERN_ERR, __br, format, ##args) 306 #define br_warn(__br, format, args...) \ 307 br_printk(KERN_WARNING, __br, format, ##args) 308 #define br_notice(__br, format, args...) \ 309 br_printk(KERN_NOTICE, __br, format, ##args) 310 #define br_info(__br, format, args...) \ 311 br_printk(KERN_INFO, __br, format, ##args) 312 313 #define br_debug(br, format, args...) \ 314 pr_debug("%s: " format, (br)->dev->name, ##args) 315 316 extern struct notifier_block br_device_notifier; 317 318 /* called under bridge lock */ 319 static inline int br_is_root_bridge(const struct net_bridge *br) 320 { 321 return !memcmp(&br->bridge_id, &br->designated_root, 8); 322 } 323 324 /* br_device.c */ 325 extern void br_dev_setup(struct net_device *dev); 326 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 327 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 328 struct net_device *dev); 329 #ifdef CONFIG_NET_POLL_CONTROLLER 330 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 331 { 332 return br->dev->npinfo; 333 } 334 335 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 336 struct sk_buff *skb) 337 { 338 struct netpoll *np = p->np; 339 340 if (np) 341 netpoll_send_skb(np, skb); 342 } 343 344 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 345 extern void br_netpoll_disable(struct net_bridge_port *p); 346 #else 347 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 348 { 349 return NULL; 350 } 351 352 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 353 struct sk_buff *skb) 354 { 355 } 356 357 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 358 { 359 return 0; 360 } 361 362 static inline void br_netpoll_disable(struct net_bridge_port *p) 363 { 364 } 365 #endif 366 367 /* br_fdb.c */ 368 extern int br_fdb_init(void); 369 extern void br_fdb_fini(void); 370 extern void br_fdb_flush(struct net_bridge *br); 371 extern void br_fdb_changeaddr(struct net_bridge_port *p, 372 const unsigned char *newaddr); 373 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 374 extern void br_fdb_cleanup(unsigned long arg); 375 extern void br_fdb_delete_by_port(struct net_bridge *br, 376 const struct net_bridge_port *p, int do_all); 377 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 378 const unsigned char *addr, 379 __u16 vid); 380 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 381 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 382 unsigned long count, unsigned long off); 383 extern int br_fdb_insert(struct net_bridge *br, 384 struct net_bridge_port *source, 385 const unsigned char *addr); 386 extern void br_fdb_update(struct net_bridge *br, 387 struct net_bridge_port *source, 388 const unsigned char *addr, 389 u16 vid); 390 391 extern int br_fdb_delete(struct ndmsg *ndm, 392 struct net_device *dev, 393 const unsigned char *addr); 394 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 395 struct net_device *dev, 396 const unsigned char *addr, 397 u16 nlh_flags); 398 extern int br_fdb_dump(struct sk_buff *skb, 399 struct netlink_callback *cb, 400 struct net_device *dev, 401 int idx); 402 403 /* br_forward.c */ 404 extern void br_deliver(const struct net_bridge_port *to, 405 struct sk_buff *skb); 406 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 407 extern void br_forward(const struct net_bridge_port *to, 408 struct sk_buff *skb, struct sk_buff *skb0); 409 extern int br_forward_finish(struct sk_buff *skb); 410 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 411 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 412 struct sk_buff *skb2); 413 414 /* br_if.c */ 415 extern void br_port_carrier_check(struct net_bridge_port *p); 416 extern int br_add_bridge(struct net *net, const char *name); 417 extern int br_del_bridge(struct net *net, const char *name); 418 extern void br_net_exit(struct net *net); 419 extern int br_add_if(struct net_bridge *br, 420 struct net_device *dev); 421 extern int br_del_if(struct net_bridge *br, 422 struct net_device *dev); 423 extern int br_min_mtu(const struct net_bridge *br); 424 extern netdev_features_t br_features_recompute(struct net_bridge *br, 425 netdev_features_t features); 426 427 /* br_input.c */ 428 extern int br_handle_frame_finish(struct sk_buff *skb); 429 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 430 431 /* br_ioctl.c */ 432 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 433 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 434 435 /* br_multicast.c */ 436 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 437 extern unsigned int br_mdb_rehash_seq; 438 extern int br_multicast_rcv(struct net_bridge *br, 439 struct net_bridge_port *port, 440 struct sk_buff *skb); 441 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 442 struct sk_buff *skb); 443 extern void br_multicast_add_port(struct net_bridge_port *port); 444 extern void br_multicast_del_port(struct net_bridge_port *port); 445 extern void br_multicast_enable_port(struct net_bridge_port *port); 446 extern void br_multicast_disable_port(struct net_bridge_port *port); 447 extern void br_multicast_init(struct net_bridge *br); 448 extern void br_multicast_open(struct net_bridge *br); 449 extern void br_multicast_stop(struct net_bridge *br); 450 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 451 struct sk_buff *skb); 452 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 453 struct sk_buff *skb, struct sk_buff *skb2); 454 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 455 extern int br_multicast_set_port_router(struct net_bridge_port *p, 456 unsigned long val); 457 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 458 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 459 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 460 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 461 struct net_bridge_mdb_htable *mdb, 462 struct br_ip *dst); 463 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 464 struct net_bridge_port *port, struct br_ip *group); 465 extern void br_multicast_free_pg(struct rcu_head *head); 466 extern struct net_bridge_port_group *br_multicast_new_port_group( 467 struct net_bridge_port *port, 468 struct br_ip *group, 469 struct net_bridge_port_group *next, 470 unsigned char state); 471 extern void br_mdb_init(void); 472 extern void br_mdb_uninit(void); 473 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 474 struct br_ip *group, int type); 475 476 #define mlock_dereference(X, br) \ 477 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 478 479 #if IS_ENABLED(CONFIG_IPV6) 480 #include <net/addrconf.h> 481 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 482 { 483 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 484 return 1; 485 return 0; 486 } 487 #endif 488 489 static inline bool br_multicast_is_router(struct net_bridge *br) 490 { 491 return br->multicast_router == 2 || 492 (br->multicast_router == 1 && 493 timer_pending(&br->multicast_router_timer)); 494 } 495 #else 496 static inline int br_multicast_rcv(struct net_bridge *br, 497 struct net_bridge_port *port, 498 struct sk_buff *skb) 499 { 500 return 0; 501 } 502 503 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 504 struct sk_buff *skb) 505 { 506 return NULL; 507 } 508 509 static inline void br_multicast_add_port(struct net_bridge_port *port) 510 { 511 } 512 513 static inline void br_multicast_del_port(struct net_bridge_port *port) 514 { 515 } 516 517 static inline void br_multicast_enable_port(struct net_bridge_port *port) 518 { 519 } 520 521 static inline void br_multicast_disable_port(struct net_bridge_port *port) 522 { 523 } 524 525 static inline void br_multicast_init(struct net_bridge *br) 526 { 527 } 528 529 static inline void br_multicast_open(struct net_bridge *br) 530 { 531 } 532 533 static inline void br_multicast_stop(struct net_bridge *br) 534 { 535 } 536 537 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 538 struct sk_buff *skb) 539 { 540 } 541 542 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 543 struct sk_buff *skb, 544 struct sk_buff *skb2) 545 { 546 } 547 static inline bool br_multicast_is_router(struct net_bridge *br) 548 { 549 return 0; 550 } 551 static inline void br_mdb_init(void) 552 { 553 } 554 static inline void br_mdb_uninit(void) 555 { 556 } 557 #endif 558 559 /* br_vlan.c */ 560 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 561 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 562 struct sk_buff *skb, u16 *vid); 563 extern bool br_allowed_egress(struct net_bridge *br, 564 const struct net_port_vlans *v, 565 const struct sk_buff *skb); 566 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 567 const struct net_port_vlans *v, 568 struct sk_buff *skb); 569 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 570 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 571 extern void br_vlan_flush(struct net_bridge *br); 572 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 573 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 574 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 575 extern void nbp_vlan_flush(struct net_bridge_port *port); 576 577 static inline struct net_port_vlans *br_get_vlan_info( 578 const struct net_bridge *br) 579 { 580 return rcu_dereference(br->vlan_info); 581 } 582 583 static inline struct net_port_vlans *nbp_get_vlan_info( 584 const struct net_bridge_port *p) 585 { 586 return rcu_dereference(p->vlan_info); 587 } 588 589 /* Since bridge now depends on 8021Q module, but the time bridge sees the 590 * skb, the vlan tag will always be present if the frame was tagged. 591 */ 592 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 593 { 594 int err = 0; 595 596 if (vlan_tx_tag_present(skb)) 597 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 598 else { 599 *vid = 0; 600 err = -EINVAL; 601 } 602 603 return err; 604 } 605 606 static inline u16 br_get_pvid(const struct net_port_vlans *v) 607 { 608 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 609 * vid wasn't set 610 */ 611 smp_rmb(); 612 return (v->pvid & VLAN_TAG_PRESENT) ? 613 (v->pvid & ~VLAN_TAG_PRESENT) : 614 VLAN_N_VID; 615 } 616 617 #else 618 static inline bool br_allowed_ingress(struct net_bridge *br, 619 struct net_port_vlans *v, 620 struct sk_buff *skb, 621 u16 *vid) 622 { 623 return true; 624 } 625 626 static inline bool br_allowed_egress(struct net_bridge *br, 627 const struct net_port_vlans *v, 628 const struct sk_buff *skb) 629 { 630 return true; 631 } 632 633 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 634 const struct net_port_vlans *v, 635 struct sk_buff *skb) 636 { 637 return skb; 638 } 639 640 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 641 { 642 return -EOPNOTSUPP; 643 } 644 645 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 646 { 647 return -EOPNOTSUPP; 648 } 649 650 static inline void br_vlan_flush(struct net_bridge *br) 651 { 652 } 653 654 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 655 { 656 return -EOPNOTSUPP; 657 } 658 659 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 660 { 661 return -EOPNOTSUPP; 662 } 663 664 static inline void nbp_vlan_flush(struct net_bridge_port *port) 665 { 666 } 667 668 static inline struct net_port_vlans *br_get_vlan_info( 669 const struct net_bridge *br) 670 { 671 return NULL; 672 } 673 static inline struct net_port_vlans *nbp_get_vlan_info( 674 const struct net_bridge_port *p) 675 { 676 return NULL; 677 } 678 679 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 680 { 681 return 0; 682 } 683 static inline u16 br_get_pvid(const struct net_port_vlans *v) 684 { 685 return VLAN_N_VID; /* Returns invalid vid */ 686 } 687 #endif 688 689 /* br_netfilter.c */ 690 #ifdef CONFIG_BRIDGE_NETFILTER 691 extern int br_netfilter_init(void); 692 extern void br_netfilter_fini(void); 693 extern void br_netfilter_rtable_init(struct net_bridge *); 694 #else 695 #define br_netfilter_init() (0) 696 #define br_netfilter_fini() do { } while(0) 697 #define br_netfilter_rtable_init(x) 698 #endif 699 700 /* br_stp.c */ 701 extern void br_log_state(const struct net_bridge_port *p); 702 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 703 u16 port_no); 704 extern void br_init_port(struct net_bridge_port *p); 705 extern void br_become_designated_port(struct net_bridge_port *p); 706 707 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 708 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 709 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 710 711 712 /* br_stp_if.c */ 713 extern void br_stp_enable_bridge(struct net_bridge *br); 714 extern void br_stp_disable_bridge(struct net_bridge *br); 715 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 716 extern void br_stp_enable_port(struct net_bridge_port *p); 717 extern void br_stp_disable_port(struct net_bridge_port *p); 718 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 719 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 720 extern void br_stp_set_bridge_priority(struct net_bridge *br, 721 u16 newprio); 722 extern int br_stp_set_port_priority(struct net_bridge_port *p, 723 unsigned long newprio); 724 extern int br_stp_set_path_cost(struct net_bridge_port *p, 725 unsigned long path_cost); 726 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 727 728 /* br_stp_bpdu.c */ 729 struct stp_proto; 730 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 731 struct net_device *dev); 732 733 /* br_stp_timer.c */ 734 extern void br_stp_timer_init(struct net_bridge *br); 735 extern void br_stp_port_timer_init(struct net_bridge_port *p); 736 extern unsigned long br_timer_value(const struct timer_list *timer); 737 738 /* br.c */ 739 #if IS_ENABLED(CONFIG_ATM_LANE) 740 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 741 #endif 742 743 /* br_netlink.c */ 744 extern struct rtnl_link_ops br_link_ops; 745 extern int br_netlink_init(void); 746 extern void br_netlink_fini(void); 747 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 748 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 749 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 750 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 751 struct net_device *dev, u32 filter_mask); 752 753 #ifdef CONFIG_SYSFS 754 /* br_sysfs_if.c */ 755 extern const struct sysfs_ops brport_sysfs_ops; 756 extern int br_sysfs_addif(struct net_bridge_port *p); 757 extern int br_sysfs_renameif(struct net_bridge_port *p); 758 759 /* br_sysfs_br.c */ 760 extern int br_sysfs_addbr(struct net_device *dev); 761 extern void br_sysfs_delbr(struct net_device *dev); 762 763 #else 764 765 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 766 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 767 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 768 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 769 #endif /* CONFIG_SYSFS */ 770 771 #endif 772