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 bool timer_armed; 116 }; 117 118 struct net_bridge_mdb_htable 119 { 120 struct hlist_head *mhash; 121 struct rcu_head rcu; 122 struct net_bridge_mdb_htable *old; 123 u32 size; 124 u32 max; 125 u32 secret; 126 u32 ver; 127 }; 128 129 struct net_bridge_port 130 { 131 struct net_bridge *br; 132 struct net_device *dev; 133 struct list_head list; 134 135 /* STP */ 136 u8 priority; 137 u8 state; 138 u16 port_no; 139 unsigned char topology_change_ack; 140 unsigned char config_pending; 141 port_id port_id; 142 port_id designated_port; 143 bridge_id designated_root; 144 bridge_id designated_bridge; 145 u32 path_cost; 146 u32 designated_cost; 147 unsigned long designated_age; 148 149 struct timer_list forward_delay_timer; 150 struct timer_list hold_timer; 151 struct timer_list message_age_timer; 152 struct kobject kobj; 153 struct rcu_head rcu; 154 155 unsigned long flags; 156 #define BR_HAIRPIN_MODE 0x00000001 157 #define BR_BPDU_GUARD 0x00000002 158 #define BR_ROOT_BLOCK 0x00000004 159 #define BR_MULTICAST_FAST_LEAVE 0x00000008 160 #define BR_ADMIN_COST 0x00000010 161 #define BR_LEARNING 0x00000020 162 #define BR_FLOOD 0x00000040 163 164 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 165 u32 multicast_startup_queries_sent; 166 unsigned char multicast_router; 167 struct timer_list multicast_router_timer; 168 struct timer_list multicast_query_timer; 169 struct hlist_head mglist; 170 struct hlist_node rlist; 171 #endif 172 173 #ifdef CONFIG_SYSFS 174 char sysfs_name[IFNAMSIZ]; 175 #endif 176 177 #ifdef CONFIG_NET_POLL_CONTROLLER 178 struct netpoll *np; 179 #endif 180 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 181 struct net_port_vlans __rcu *vlan_info; 182 #endif 183 }; 184 185 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 186 187 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 188 { 189 struct net_bridge_port *port = 190 rcu_dereference_rtnl(dev->rx_handler_data); 191 192 return br_port_exists(dev) ? port : NULL; 193 } 194 195 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 196 { 197 return br_port_exists(dev) ? 198 rtnl_dereference(dev->rx_handler_data) : NULL; 199 } 200 201 struct br_cpu_netstats { 202 u64 rx_packets; 203 u64 rx_bytes; 204 u64 tx_packets; 205 u64 tx_bytes; 206 struct u64_stats_sync syncp; 207 }; 208 209 struct net_bridge 210 { 211 spinlock_t lock; 212 struct list_head port_list; 213 struct net_device *dev; 214 215 struct br_cpu_netstats __percpu *stats; 216 spinlock_t hash_lock; 217 struct hlist_head hash[BR_HASH_SIZE]; 218 #ifdef CONFIG_BRIDGE_NETFILTER 219 struct rtable fake_rtable; 220 bool nf_call_iptables; 221 bool nf_call_ip6tables; 222 bool nf_call_arptables; 223 #endif 224 u16 group_fwd_mask; 225 226 /* STP */ 227 bridge_id designated_root; 228 bridge_id bridge_id; 229 u32 root_path_cost; 230 unsigned long max_age; 231 unsigned long hello_time; 232 unsigned long forward_delay; 233 unsigned long bridge_max_age; 234 unsigned long ageing_time; 235 unsigned long bridge_hello_time; 236 unsigned long bridge_forward_delay; 237 238 u8 group_addr[ETH_ALEN]; 239 u16 root_port; 240 241 enum { 242 BR_NO_STP, /* no spanning tree */ 243 BR_KERNEL_STP, /* old STP in kernel */ 244 BR_USER_STP, /* new RSTP in userspace */ 245 } stp_enabled; 246 247 unsigned char topology_change; 248 unsigned char topology_change_detected; 249 250 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 251 unsigned char multicast_router; 252 253 u8 multicast_disabled:1; 254 u8 multicast_querier:1; 255 u8 multicast_query_use_ifaddr:1; 256 257 u32 hash_elasticity; 258 u32 hash_max; 259 260 u32 multicast_last_member_count; 261 u32 multicast_startup_queries_sent; 262 u32 multicast_startup_query_count; 263 264 unsigned long multicast_last_member_interval; 265 unsigned long multicast_membership_interval; 266 unsigned long multicast_querier_interval; 267 unsigned long multicast_query_interval; 268 unsigned long multicast_query_response_interval; 269 unsigned long multicast_startup_query_interval; 270 271 spinlock_t multicast_lock; 272 struct net_bridge_mdb_htable __rcu *mdb; 273 struct hlist_head router_list; 274 275 struct timer_list multicast_router_timer; 276 struct timer_list multicast_querier_timer; 277 struct timer_list multicast_query_timer; 278 #endif 279 280 struct timer_list hello_timer; 281 struct timer_list tcn_timer; 282 struct timer_list topology_change_timer; 283 struct timer_list gc_timer; 284 struct kobject *ifobj; 285 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 286 u8 vlan_enabled; 287 struct net_port_vlans __rcu *vlan_info; 288 #endif 289 }; 290 291 struct br_input_skb_cb { 292 struct net_device *brdev; 293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 294 int igmp; 295 int mrouters_only; 296 #endif 297 }; 298 299 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 300 301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 302 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 303 #else 304 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 305 #endif 306 307 #define br_printk(level, br, format, args...) \ 308 printk(level "%s: " format, (br)->dev->name, ##args) 309 310 #define br_err(__br, format, args...) \ 311 br_printk(KERN_ERR, __br, format, ##args) 312 #define br_warn(__br, format, args...) \ 313 br_printk(KERN_WARNING, __br, format, ##args) 314 #define br_notice(__br, format, args...) \ 315 br_printk(KERN_NOTICE, __br, format, ##args) 316 #define br_info(__br, format, args...) \ 317 br_printk(KERN_INFO, __br, format, ##args) 318 319 #define br_debug(br, format, args...) \ 320 pr_debug("%s: " format, (br)->dev->name, ##args) 321 322 extern struct notifier_block br_device_notifier; 323 324 /* called under bridge lock */ 325 static inline int br_is_root_bridge(const struct net_bridge *br) 326 { 327 return !memcmp(&br->bridge_id, &br->designated_root, 8); 328 } 329 330 /* br_device.c */ 331 extern void br_dev_setup(struct net_device *dev); 332 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 333 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 334 struct net_device *dev); 335 #ifdef CONFIG_NET_POLL_CONTROLLER 336 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 337 struct sk_buff *skb) 338 { 339 struct netpoll *np = p->np; 340 341 if (np) 342 netpoll_send_skb(np, skb); 343 } 344 345 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 346 extern void br_netpoll_disable(struct net_bridge_port *p); 347 #else 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 __u16 vid); 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 u16 vid); 383 extern void br_fdb_update(struct net_bridge *br, 384 struct net_bridge_port *source, 385 const unsigned char *addr, 386 u16 vid); 387 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 388 389 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 390 struct net_device *dev, 391 const unsigned char *addr); 392 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 393 struct net_device *dev, 394 const unsigned char *addr, 395 u16 nlh_flags); 396 extern int br_fdb_dump(struct sk_buff *skb, 397 struct netlink_callback *cb, 398 struct net_device *dev, 399 int idx); 400 401 /* br_forward.c */ 402 extern void br_deliver(const struct net_bridge_port *to, 403 struct sk_buff *skb); 404 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 405 extern void br_forward(const struct net_bridge_port *to, 406 struct sk_buff *skb, struct sk_buff *skb0); 407 extern int br_forward_finish(struct sk_buff *skb); 408 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 409 bool unicast); 410 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 411 struct sk_buff *skb2, bool unicast); 412 413 /* br_if.c */ 414 extern void br_port_carrier_check(struct net_bridge_port *p); 415 extern int br_add_bridge(struct net *net, const char *name); 416 extern int br_del_bridge(struct net *net, const char *name); 417 extern void br_net_exit(struct net *net); 418 extern int br_add_if(struct net_bridge *br, 419 struct net_device *dev); 420 extern int br_del_if(struct net_bridge *br, 421 struct net_device *dev); 422 extern int br_min_mtu(const struct net_bridge *br); 423 extern netdev_features_t br_features_recompute(struct net_bridge *br, 424 netdev_features_t features); 425 426 /* br_input.c */ 427 extern int br_handle_frame_finish(struct sk_buff *skb); 428 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 429 430 /* br_ioctl.c */ 431 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 432 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 433 434 /* br_multicast.c */ 435 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 436 extern unsigned int br_mdb_rehash_seq; 437 extern int br_multicast_rcv(struct net_bridge *br, 438 struct net_bridge_port *port, 439 struct sk_buff *skb); 440 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 441 struct sk_buff *skb, u16 vid); 442 extern void br_multicast_add_port(struct net_bridge_port *port); 443 extern void br_multicast_del_port(struct net_bridge_port *port); 444 extern void br_multicast_enable_port(struct net_bridge_port *port); 445 extern void br_multicast_disable_port(struct net_bridge_port *port); 446 extern void br_multicast_init(struct net_bridge *br); 447 extern void br_multicast_open(struct net_bridge *br); 448 extern void br_multicast_stop(struct net_bridge *br); 449 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 450 struct sk_buff *skb); 451 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 452 struct sk_buff *skb, struct sk_buff *skb2); 453 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 454 extern int br_multicast_set_port_router(struct net_bridge_port *p, 455 unsigned long val); 456 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 457 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 458 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 459 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 460 struct net_bridge_mdb_htable *mdb, 461 struct br_ip *dst); 462 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 463 struct net_bridge_port *port, struct br_ip *group); 464 extern void br_multicast_free_pg(struct rcu_head *head); 465 extern struct net_bridge_port_group *br_multicast_new_port_group( 466 struct net_bridge_port *port, 467 struct br_ip *group, 468 struct net_bridge_port_group *next, 469 unsigned char state); 470 extern void br_mdb_init(void); 471 extern void br_mdb_uninit(void); 472 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 473 struct br_ip *group, int type); 474 475 #define mlock_dereference(X, br) \ 476 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 477 478 #if IS_ENABLED(CONFIG_IPV6) 479 #include <net/addrconf.h> 480 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 481 { 482 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 483 return 1; 484 return 0; 485 } 486 #endif 487 488 static inline bool br_multicast_is_router(struct net_bridge *br) 489 { 490 return br->multicast_router == 2 || 491 (br->multicast_router == 1 && 492 timer_pending(&br->multicast_router_timer)); 493 } 494 #else 495 static inline int br_multicast_rcv(struct net_bridge *br, 496 struct net_bridge_port *port, 497 struct sk_buff *skb) 498 { 499 return 0; 500 } 501 502 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 503 struct sk_buff *skb, u16 vid) 504 { 505 return NULL; 506 } 507 508 static inline void br_multicast_add_port(struct net_bridge_port *port) 509 { 510 } 511 512 static inline void br_multicast_del_port(struct net_bridge_port *port) 513 { 514 } 515 516 static inline void br_multicast_enable_port(struct net_bridge_port *port) 517 { 518 } 519 520 static inline void br_multicast_disable_port(struct net_bridge_port *port) 521 { 522 } 523 524 static inline void br_multicast_init(struct net_bridge *br) 525 { 526 } 527 528 static inline void br_multicast_open(struct net_bridge *br) 529 { 530 } 531 532 static inline void br_multicast_stop(struct net_bridge *br) 533 { 534 } 535 536 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 537 struct sk_buff *skb) 538 { 539 } 540 541 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 542 struct sk_buff *skb, 543 struct sk_buff *skb2) 544 { 545 } 546 static inline bool br_multicast_is_router(struct net_bridge *br) 547 { 548 return 0; 549 } 550 static inline void br_mdb_init(void) 551 { 552 } 553 static inline void br_mdb_uninit(void) 554 { 555 } 556 #endif 557 558 /* br_vlan.c */ 559 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 560 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 561 struct sk_buff *skb, u16 *vid); 562 extern bool br_allowed_egress(struct net_bridge *br, 563 const struct net_port_vlans *v, 564 const struct sk_buff *skb); 565 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 566 const struct net_port_vlans *v, 567 struct sk_buff *skb); 568 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 569 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 570 extern void br_vlan_flush(struct net_bridge *br); 571 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 572 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 573 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 574 extern void nbp_vlan_flush(struct net_bridge_port *port); 575 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 576 577 static inline struct net_port_vlans *br_get_vlan_info( 578 const struct net_bridge *br) 579 { 580 return rcu_dereference_rtnl(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_rtnl(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 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 680 { 681 return false; 682 } 683 684 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 685 { 686 return 0; 687 } 688 static inline u16 br_get_pvid(const struct net_port_vlans *v) 689 { 690 return VLAN_N_VID; /* Returns invalid vid */ 691 } 692 #endif 693 694 /* br_netfilter.c */ 695 #ifdef CONFIG_BRIDGE_NETFILTER 696 extern int br_netfilter_init(void); 697 extern void br_netfilter_fini(void); 698 extern void br_netfilter_rtable_init(struct net_bridge *); 699 #else 700 #define br_netfilter_init() (0) 701 #define br_netfilter_fini() do { } while(0) 702 #define br_netfilter_rtable_init(x) 703 #endif 704 705 /* br_stp.c */ 706 extern void br_log_state(const struct net_bridge_port *p); 707 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 708 u16 port_no); 709 extern void br_init_port(struct net_bridge_port *p); 710 extern void br_become_designated_port(struct net_bridge_port *p); 711 712 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 713 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 714 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 715 716 717 /* br_stp_if.c */ 718 extern void br_stp_enable_bridge(struct net_bridge *br); 719 extern void br_stp_disable_bridge(struct net_bridge *br); 720 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 721 extern void br_stp_enable_port(struct net_bridge_port *p); 722 extern void br_stp_disable_port(struct net_bridge_port *p); 723 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 724 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 725 extern void br_stp_set_bridge_priority(struct net_bridge *br, 726 u16 newprio); 727 extern int br_stp_set_port_priority(struct net_bridge_port *p, 728 unsigned long newprio); 729 extern int br_stp_set_path_cost(struct net_bridge_port *p, 730 unsigned long path_cost); 731 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 732 733 /* br_stp_bpdu.c */ 734 struct stp_proto; 735 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 736 struct net_device *dev); 737 738 /* br_stp_timer.c */ 739 extern void br_stp_timer_init(struct net_bridge *br); 740 extern void br_stp_port_timer_init(struct net_bridge_port *p); 741 extern unsigned long br_timer_value(const struct timer_list *timer); 742 743 /* br.c */ 744 #if IS_ENABLED(CONFIG_ATM_LANE) 745 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 746 #endif 747 748 /* br_netlink.c */ 749 extern struct rtnl_link_ops br_link_ops; 750 extern int br_netlink_init(void); 751 extern void br_netlink_fini(void); 752 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 753 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 754 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 755 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 756 struct net_device *dev, u32 filter_mask); 757 758 #ifdef CONFIG_SYSFS 759 /* br_sysfs_if.c */ 760 extern const struct sysfs_ops brport_sysfs_ops; 761 extern int br_sysfs_addif(struct net_bridge_port *p); 762 extern int br_sysfs_renameif(struct net_bridge_port *p); 763 764 /* br_sysfs_br.c */ 765 extern int br_sysfs_addbr(struct net_device *dev); 766 extern void br_sysfs_delbr(struct net_device *dev); 767 768 #else 769 770 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 771 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 772 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 773 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 774 #endif /* CONFIG_SYSFS */ 775 776 #endif 777