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 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 79 u16 num_vlans; 80 }; 81 82 struct net_bridge_fdb_entry 83 { 84 struct hlist_node hlist; 85 struct net_bridge_port *dst; 86 87 struct rcu_head rcu; 88 unsigned long updated; 89 unsigned long used; 90 mac_addr addr; 91 unsigned char is_local; 92 unsigned char is_static; 93 __u16 vlan_id; 94 }; 95 96 struct net_bridge_port_group { 97 struct net_bridge_port *port; 98 struct net_bridge_port_group __rcu *next; 99 struct hlist_node mglist; 100 struct rcu_head rcu; 101 struct timer_list timer; 102 struct br_ip addr; 103 unsigned char state; 104 }; 105 106 struct net_bridge_mdb_entry 107 { 108 struct hlist_node hlist[2]; 109 struct net_bridge *br; 110 struct net_bridge_port_group __rcu *ports; 111 struct rcu_head rcu; 112 struct timer_list timer; 113 struct br_ip addr; 114 bool mglist; 115 }; 116 117 struct net_bridge_mdb_htable 118 { 119 struct hlist_head *mhash; 120 struct rcu_head rcu; 121 struct net_bridge_mdb_htable *old; 122 u32 size; 123 u32 max; 124 u32 secret; 125 u32 ver; 126 }; 127 128 struct net_bridge_port 129 { 130 struct net_bridge *br; 131 struct net_device *dev; 132 struct list_head list; 133 134 /* STP */ 135 u8 priority; 136 u8 state; 137 u16 port_no; 138 unsigned char topology_change_ack; 139 unsigned char config_pending; 140 port_id port_id; 141 port_id designated_port; 142 bridge_id designated_root; 143 bridge_id designated_bridge; 144 u32 path_cost; 145 u32 designated_cost; 146 unsigned long designated_age; 147 148 struct timer_list forward_delay_timer; 149 struct timer_list hold_timer; 150 struct timer_list message_age_timer; 151 struct kobject kobj; 152 struct rcu_head rcu; 153 154 unsigned long flags; 155 #define BR_HAIRPIN_MODE 0x00000001 156 #define BR_BPDU_GUARD 0x00000002 157 #define BR_ROOT_BLOCK 0x00000004 158 #define BR_MULTICAST_FAST_LEAVE 0x00000008 159 #define BR_ADMIN_COST 0x00000010 160 161 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 162 u32 multicast_startup_queries_sent; 163 unsigned char multicast_router; 164 struct timer_list multicast_router_timer; 165 struct timer_list multicast_query_timer; 166 struct hlist_head mglist; 167 struct hlist_node rlist; 168 #endif 169 170 #ifdef CONFIG_SYSFS 171 char sysfs_name[IFNAMSIZ]; 172 #endif 173 174 #ifdef CONFIG_NET_POLL_CONTROLLER 175 struct netpoll *np; 176 #endif 177 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 178 struct net_port_vlans __rcu *vlan_info; 179 #endif 180 }; 181 182 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 183 184 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 185 { 186 struct net_bridge_port *port = 187 rcu_dereference_rtnl(dev->rx_handler_data); 188 189 return br_port_exists(dev) ? port : NULL; 190 } 191 192 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 193 { 194 return br_port_exists(dev) ? 195 rtnl_dereference(dev->rx_handler_data) : NULL; 196 } 197 198 struct br_cpu_netstats { 199 u64 rx_packets; 200 u64 rx_bytes; 201 u64 tx_packets; 202 u64 tx_bytes; 203 struct u64_stats_sync syncp; 204 }; 205 206 struct net_bridge 207 { 208 spinlock_t lock; 209 struct list_head port_list; 210 struct net_device *dev; 211 212 struct br_cpu_netstats __percpu *stats; 213 spinlock_t hash_lock; 214 struct hlist_head hash[BR_HASH_SIZE]; 215 #ifdef CONFIG_BRIDGE_NETFILTER 216 struct rtable fake_rtable; 217 bool nf_call_iptables; 218 bool nf_call_ip6tables; 219 bool nf_call_arptables; 220 #endif 221 u16 group_fwd_mask; 222 223 /* STP */ 224 bridge_id designated_root; 225 bridge_id bridge_id; 226 u32 root_path_cost; 227 unsigned long max_age; 228 unsigned long hello_time; 229 unsigned long forward_delay; 230 unsigned long bridge_max_age; 231 unsigned long ageing_time; 232 unsigned long bridge_hello_time; 233 unsigned long bridge_forward_delay; 234 235 u8 group_addr[ETH_ALEN]; 236 u16 root_port; 237 238 enum { 239 BR_NO_STP, /* no spanning tree */ 240 BR_KERNEL_STP, /* old STP in kernel */ 241 BR_USER_STP, /* new RSTP in userspace */ 242 } stp_enabled; 243 244 unsigned char topology_change; 245 unsigned char topology_change_detected; 246 247 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 248 unsigned char multicast_router; 249 250 u8 multicast_disabled:1; 251 u8 multicast_querier:1; 252 253 u32 hash_elasticity; 254 u32 hash_max; 255 256 u32 multicast_last_member_count; 257 u32 multicast_startup_queries_sent; 258 u32 multicast_startup_query_count; 259 260 unsigned long multicast_last_member_interval; 261 unsigned long multicast_membership_interval; 262 unsigned long multicast_querier_interval; 263 unsigned long multicast_query_interval; 264 unsigned long multicast_query_response_interval; 265 unsigned long multicast_startup_query_interval; 266 267 spinlock_t multicast_lock; 268 struct net_bridge_mdb_htable __rcu *mdb; 269 struct hlist_head router_list; 270 271 struct timer_list multicast_router_timer; 272 struct timer_list multicast_querier_timer; 273 struct timer_list multicast_query_timer; 274 #endif 275 276 struct timer_list hello_timer; 277 struct timer_list tcn_timer; 278 struct timer_list topology_change_timer; 279 struct timer_list gc_timer; 280 struct kobject *ifobj; 281 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 282 u8 vlan_enabled; 283 struct net_port_vlans __rcu *vlan_info; 284 #endif 285 }; 286 287 struct br_input_skb_cb { 288 struct net_device *brdev; 289 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 290 int igmp; 291 int mrouters_only; 292 #endif 293 }; 294 295 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 296 297 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 298 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 299 #else 300 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 301 #endif 302 303 #define br_printk(level, br, format, args...) \ 304 printk(level "%s: " format, (br)->dev->name, ##args) 305 306 #define br_err(__br, format, args...) \ 307 br_printk(KERN_ERR, __br, format, ##args) 308 #define br_warn(__br, format, args...) \ 309 br_printk(KERN_WARNING, __br, format, ##args) 310 #define br_notice(__br, format, args...) \ 311 br_printk(KERN_NOTICE, __br, format, ##args) 312 #define br_info(__br, format, args...) \ 313 br_printk(KERN_INFO, __br, format, ##args) 314 315 #define br_debug(br, format, args...) \ 316 pr_debug("%s: " format, (br)->dev->name, ##args) 317 318 extern struct notifier_block br_device_notifier; 319 320 /* called under bridge lock */ 321 static inline int br_is_root_bridge(const struct net_bridge *br) 322 { 323 return !memcmp(&br->bridge_id, &br->designated_root, 8); 324 } 325 326 /* br_device.c */ 327 extern void br_dev_setup(struct net_device *dev); 328 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 329 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 330 struct net_device *dev); 331 #ifdef CONFIG_NET_POLL_CONTROLLER 332 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 333 { 334 return br->dev->npinfo; 335 } 336 337 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 338 struct sk_buff *skb) 339 { 340 struct netpoll *np = p->np; 341 342 if (np) 343 netpoll_send_skb(np, skb); 344 } 345 346 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 347 extern void br_netpoll_disable(struct net_bridge_port *p); 348 #else 349 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 350 { 351 return NULL; 352 } 353 354 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 355 struct sk_buff *skb) 356 { 357 } 358 359 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 360 { 361 return 0; 362 } 363 364 static inline void br_netpoll_disable(struct net_bridge_port *p) 365 { 366 } 367 #endif 368 369 /* br_fdb.c */ 370 extern int br_fdb_init(void); 371 extern void br_fdb_fini(void); 372 extern void br_fdb_flush(struct net_bridge *br); 373 extern void br_fdb_changeaddr(struct net_bridge_port *p, 374 const unsigned char *newaddr); 375 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 376 extern void br_fdb_cleanup(unsigned long arg); 377 extern void br_fdb_delete_by_port(struct net_bridge *br, 378 const struct net_bridge_port *p, int do_all); 379 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 380 const unsigned char *addr, 381 __u16 vid); 382 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 383 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 384 unsigned long count, unsigned long off); 385 extern int br_fdb_insert(struct net_bridge *br, 386 struct net_bridge_port *source, 387 const unsigned char *addr, 388 u16 vid); 389 extern void br_fdb_update(struct net_bridge *br, 390 struct net_bridge_port *source, 391 const unsigned char *addr, 392 u16 vid); 393 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 394 395 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 396 struct net_device *dev, 397 const unsigned char *addr); 398 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 399 struct net_device *dev, 400 const unsigned char *addr, 401 u16 nlh_flags); 402 extern int br_fdb_dump(struct sk_buff *skb, 403 struct netlink_callback *cb, 404 struct net_device *dev, 405 int idx); 406 407 /* br_forward.c */ 408 extern void br_deliver(const struct net_bridge_port *to, 409 struct sk_buff *skb); 410 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 411 extern void br_forward(const struct net_bridge_port *to, 412 struct sk_buff *skb, struct sk_buff *skb0); 413 extern int br_forward_finish(struct sk_buff *skb); 414 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 415 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 416 struct sk_buff *skb2); 417 418 /* br_if.c */ 419 extern void br_port_carrier_check(struct net_bridge_port *p); 420 extern int br_add_bridge(struct net *net, const char *name); 421 extern int br_del_bridge(struct net *net, const char *name); 422 extern void br_net_exit(struct net *net); 423 extern int br_add_if(struct net_bridge *br, 424 struct net_device *dev); 425 extern int br_del_if(struct net_bridge *br, 426 struct net_device *dev); 427 extern int br_min_mtu(const struct net_bridge *br); 428 extern netdev_features_t br_features_recompute(struct net_bridge *br, 429 netdev_features_t features); 430 431 /* br_input.c */ 432 extern int br_handle_frame_finish(struct sk_buff *skb); 433 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 434 435 /* br_ioctl.c */ 436 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 437 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 438 439 /* br_multicast.c */ 440 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 441 extern unsigned int br_mdb_rehash_seq; 442 extern int br_multicast_rcv(struct net_bridge *br, 443 struct net_bridge_port *port, 444 struct sk_buff *skb); 445 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 446 struct sk_buff *skb, u16 vid); 447 extern void br_multicast_add_port(struct net_bridge_port *port); 448 extern void br_multicast_del_port(struct net_bridge_port *port); 449 extern void br_multicast_enable_port(struct net_bridge_port *port); 450 extern void br_multicast_disable_port(struct net_bridge_port *port); 451 extern void br_multicast_init(struct net_bridge *br); 452 extern void br_multicast_open(struct net_bridge *br); 453 extern void br_multicast_stop(struct net_bridge *br); 454 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 455 struct sk_buff *skb); 456 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 457 struct sk_buff *skb, struct sk_buff *skb2); 458 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 459 extern int br_multicast_set_port_router(struct net_bridge_port *p, 460 unsigned long val); 461 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 462 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 463 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 464 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 465 struct net_bridge_mdb_htable *mdb, 466 struct br_ip *dst); 467 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 468 struct net_bridge_port *port, struct br_ip *group); 469 extern void br_multicast_free_pg(struct rcu_head *head); 470 extern struct net_bridge_port_group *br_multicast_new_port_group( 471 struct net_bridge_port *port, 472 struct br_ip *group, 473 struct net_bridge_port_group *next, 474 unsigned char state); 475 extern void br_mdb_init(void); 476 extern void br_mdb_uninit(void); 477 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 478 struct br_ip *group, int type); 479 480 #define mlock_dereference(X, br) \ 481 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 482 483 #if IS_ENABLED(CONFIG_IPV6) 484 #include <net/addrconf.h> 485 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 486 { 487 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 488 return 1; 489 return 0; 490 } 491 #endif 492 493 static inline bool br_multicast_is_router(struct net_bridge *br) 494 { 495 return br->multicast_router == 2 || 496 (br->multicast_router == 1 && 497 timer_pending(&br->multicast_router_timer)); 498 } 499 #else 500 static inline int br_multicast_rcv(struct net_bridge *br, 501 struct net_bridge_port *port, 502 struct sk_buff *skb) 503 { 504 return 0; 505 } 506 507 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 508 struct sk_buff *skb, u16 vid) 509 { 510 return NULL; 511 } 512 513 static inline void br_multicast_add_port(struct net_bridge_port *port) 514 { 515 } 516 517 static inline void br_multicast_del_port(struct net_bridge_port *port) 518 { 519 } 520 521 static inline void br_multicast_enable_port(struct net_bridge_port *port) 522 { 523 } 524 525 static inline void br_multicast_disable_port(struct net_bridge_port *port) 526 { 527 } 528 529 static inline void br_multicast_init(struct net_bridge *br) 530 { 531 } 532 533 static inline void br_multicast_open(struct net_bridge *br) 534 { 535 } 536 537 static inline void br_multicast_stop(struct net_bridge *br) 538 { 539 } 540 541 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 542 struct sk_buff *skb) 543 { 544 } 545 546 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 547 struct sk_buff *skb, 548 struct sk_buff *skb2) 549 { 550 } 551 static inline bool br_multicast_is_router(struct net_bridge *br) 552 { 553 return 0; 554 } 555 static inline void br_mdb_init(void) 556 { 557 } 558 static inline void br_mdb_uninit(void) 559 { 560 } 561 #endif 562 563 /* br_vlan.c */ 564 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 565 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 566 struct sk_buff *skb, u16 *vid); 567 extern bool br_allowed_egress(struct net_bridge *br, 568 const struct net_port_vlans *v, 569 const struct sk_buff *skb); 570 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 571 const struct net_port_vlans *v, 572 struct sk_buff *skb); 573 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 574 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 575 extern void br_vlan_flush(struct net_bridge *br); 576 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 577 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 578 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 579 extern void nbp_vlan_flush(struct net_bridge_port *port); 580 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 581 582 static inline struct net_port_vlans *br_get_vlan_info( 583 const struct net_bridge *br) 584 { 585 return rcu_dereference_rtnl(br->vlan_info); 586 } 587 588 static inline struct net_port_vlans *nbp_get_vlan_info( 589 const struct net_bridge_port *p) 590 { 591 return rcu_dereference_rtnl(p->vlan_info); 592 } 593 594 /* Since bridge now depends on 8021Q module, but the time bridge sees the 595 * skb, the vlan tag will always be present if the frame was tagged. 596 */ 597 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 598 { 599 int err = 0; 600 601 if (vlan_tx_tag_present(skb)) 602 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 603 else { 604 *vid = 0; 605 err = -EINVAL; 606 } 607 608 return err; 609 } 610 611 static inline u16 br_get_pvid(const struct net_port_vlans *v) 612 { 613 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 614 * vid wasn't set 615 */ 616 smp_rmb(); 617 return (v->pvid & VLAN_TAG_PRESENT) ? 618 (v->pvid & ~VLAN_TAG_PRESENT) : 619 VLAN_N_VID; 620 } 621 622 #else 623 static inline bool br_allowed_ingress(struct net_bridge *br, 624 struct net_port_vlans *v, 625 struct sk_buff *skb, 626 u16 *vid) 627 { 628 return true; 629 } 630 631 static inline bool br_allowed_egress(struct net_bridge *br, 632 const struct net_port_vlans *v, 633 const struct sk_buff *skb) 634 { 635 return true; 636 } 637 638 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 639 const struct net_port_vlans *v, 640 struct sk_buff *skb) 641 { 642 return skb; 643 } 644 645 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 646 { 647 return -EOPNOTSUPP; 648 } 649 650 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 651 { 652 return -EOPNOTSUPP; 653 } 654 655 static inline void br_vlan_flush(struct net_bridge *br) 656 { 657 } 658 659 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 660 { 661 return -EOPNOTSUPP; 662 } 663 664 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 665 { 666 return -EOPNOTSUPP; 667 } 668 669 static inline void nbp_vlan_flush(struct net_bridge_port *port) 670 { 671 } 672 673 static inline struct net_port_vlans *br_get_vlan_info( 674 const struct net_bridge *br) 675 { 676 return NULL; 677 } 678 static inline struct net_port_vlans *nbp_get_vlan_info( 679 const struct net_bridge_port *p) 680 { 681 return NULL; 682 } 683 684 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 685 { 686 return false; 687 } 688 689 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 690 { 691 return 0; 692 } 693 static inline u16 br_get_pvid(const struct net_port_vlans *v) 694 { 695 return VLAN_N_VID; /* Returns invalid vid */ 696 } 697 #endif 698 699 /* br_netfilter.c */ 700 #ifdef CONFIG_BRIDGE_NETFILTER 701 extern int br_netfilter_init(void); 702 extern void br_netfilter_fini(void); 703 extern void br_netfilter_rtable_init(struct net_bridge *); 704 #else 705 #define br_netfilter_init() (0) 706 #define br_netfilter_fini() do { } while(0) 707 #define br_netfilter_rtable_init(x) 708 #endif 709 710 /* br_stp.c */ 711 extern void br_log_state(const struct net_bridge_port *p); 712 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 713 u16 port_no); 714 extern void br_init_port(struct net_bridge_port *p); 715 extern void br_become_designated_port(struct net_bridge_port *p); 716 717 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 718 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 719 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 720 721 722 /* br_stp_if.c */ 723 extern void br_stp_enable_bridge(struct net_bridge *br); 724 extern void br_stp_disable_bridge(struct net_bridge *br); 725 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 726 extern void br_stp_enable_port(struct net_bridge_port *p); 727 extern void br_stp_disable_port(struct net_bridge_port *p); 728 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 729 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 730 extern void br_stp_set_bridge_priority(struct net_bridge *br, 731 u16 newprio); 732 extern int br_stp_set_port_priority(struct net_bridge_port *p, 733 unsigned long newprio); 734 extern int br_stp_set_path_cost(struct net_bridge_port *p, 735 unsigned long path_cost); 736 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 737 738 /* br_stp_bpdu.c */ 739 struct stp_proto; 740 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 741 struct net_device *dev); 742 743 /* br_stp_timer.c */ 744 extern void br_stp_timer_init(struct net_bridge *br); 745 extern void br_stp_port_timer_init(struct net_bridge_port *p); 746 extern unsigned long br_timer_value(const struct timer_list *timer); 747 748 /* br.c */ 749 #if IS_ENABLED(CONFIG_ATM_LANE) 750 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 751 #endif 752 753 /* br_netlink.c */ 754 extern struct rtnl_link_ops br_link_ops; 755 extern int br_netlink_init(void); 756 extern void br_netlink_fini(void); 757 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 758 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 759 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 760 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 761 struct net_device *dev, u32 filter_mask); 762 763 #ifdef CONFIG_SYSFS 764 /* br_sysfs_if.c */ 765 extern const struct sysfs_ops brport_sysfs_ops; 766 extern int br_sysfs_addif(struct net_bridge_port *p); 767 extern int br_sysfs_renameif(struct net_bridge_port *p); 768 769 /* br_sysfs_br.c */ 770 extern int br_sysfs_addbr(struct net_device *dev); 771 extern void br_sysfs_delbr(struct net_device *dev); 772 773 #else 774 775 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 776 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 777 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 778 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 779 #endif /* CONFIG_SYSFS */ 780 781 #endif 782