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 unsigned long multicast_querier_delay_time; 271 272 spinlock_t multicast_lock; 273 struct net_bridge_mdb_htable __rcu *mdb; 274 struct hlist_head router_list; 275 276 struct timer_list multicast_router_timer; 277 struct timer_list multicast_querier_timer; 278 struct timer_list multicast_query_timer; 279 #endif 280 281 struct timer_list hello_timer; 282 struct timer_list tcn_timer; 283 struct timer_list topology_change_timer; 284 struct timer_list gc_timer; 285 struct kobject *ifobj; 286 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 287 u8 vlan_enabled; 288 struct net_port_vlans __rcu *vlan_info; 289 #endif 290 }; 291 292 struct br_input_skb_cb { 293 struct net_device *brdev; 294 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 295 int igmp; 296 int mrouters_only; 297 #endif 298 }; 299 300 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 301 302 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 303 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 304 #else 305 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 306 #endif 307 308 #define br_printk(level, br, format, args...) \ 309 printk(level "%s: " format, (br)->dev->name, ##args) 310 311 #define br_err(__br, format, args...) \ 312 br_printk(KERN_ERR, __br, format, ##args) 313 #define br_warn(__br, format, args...) \ 314 br_printk(KERN_WARNING, __br, format, ##args) 315 #define br_notice(__br, format, args...) \ 316 br_printk(KERN_NOTICE, __br, format, ##args) 317 #define br_info(__br, format, args...) \ 318 br_printk(KERN_INFO, __br, format, ##args) 319 320 #define br_debug(br, format, args...) \ 321 pr_debug("%s: " format, (br)->dev->name, ##args) 322 323 extern struct notifier_block br_device_notifier; 324 325 /* called under bridge lock */ 326 static inline int br_is_root_bridge(const struct net_bridge *br) 327 { 328 return !memcmp(&br->bridge_id, &br->designated_root, 8); 329 } 330 331 /* br_device.c */ 332 extern void br_dev_setup(struct net_device *dev); 333 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 334 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 335 struct net_device *dev); 336 #ifdef CONFIG_NET_POLL_CONTROLLER 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 void br_netpoll_send_skb(const struct net_bridge_port *p, 350 struct sk_buff *skb) 351 { 352 } 353 354 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 355 { 356 return 0; 357 } 358 359 static inline void br_netpoll_disable(struct net_bridge_port *p) 360 { 361 } 362 #endif 363 364 /* br_fdb.c */ 365 extern int br_fdb_init(void); 366 extern void br_fdb_fini(void); 367 extern void br_fdb_flush(struct net_bridge *br); 368 extern void br_fdb_changeaddr(struct net_bridge_port *p, 369 const unsigned char *newaddr); 370 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 371 extern void br_fdb_cleanup(unsigned long arg); 372 extern void br_fdb_delete_by_port(struct net_bridge *br, 373 const struct net_bridge_port *p, int do_all); 374 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 375 const unsigned char *addr, 376 __u16 vid); 377 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 378 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 379 unsigned long count, unsigned long off); 380 extern int br_fdb_insert(struct net_bridge *br, 381 struct net_bridge_port *source, 382 const unsigned char *addr, 383 u16 vid); 384 extern void br_fdb_update(struct net_bridge *br, 385 struct net_bridge_port *source, 386 const unsigned char *addr, 387 u16 vid); 388 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 389 390 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 391 struct net_device *dev, 392 const unsigned char *addr); 393 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 394 struct net_device *dev, 395 const unsigned char *addr, 396 u16 nlh_flags); 397 extern int br_fdb_dump(struct sk_buff *skb, 398 struct netlink_callback *cb, 399 struct net_device *dev, 400 int idx); 401 402 /* br_forward.c */ 403 extern void br_deliver(const struct net_bridge_port *to, 404 struct sk_buff *skb); 405 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 406 extern void br_forward(const struct net_bridge_port *to, 407 struct sk_buff *skb, struct sk_buff *skb0); 408 extern int br_forward_finish(struct sk_buff *skb); 409 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 410 bool unicast); 411 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 412 struct sk_buff *skb2, bool unicast); 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, u16 vid); 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 __rcu *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 static inline bool br_multicast_is_router(struct net_bridge *br) 480 { 481 return br->multicast_router == 2 || 482 (br->multicast_router == 1 && 483 timer_pending(&br->multicast_router_timer)); 484 } 485 486 static inline bool br_multicast_querier_exists(struct net_bridge *br) 487 { 488 return time_is_before_jiffies(br->multicast_querier_delay_time) && 489 (br->multicast_querier || 490 timer_pending(&br->multicast_querier_timer)); 491 } 492 #else 493 static inline int br_multicast_rcv(struct net_bridge *br, 494 struct net_bridge_port *port, 495 struct sk_buff *skb) 496 { 497 return 0; 498 } 499 500 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 501 struct sk_buff *skb, u16 vid) 502 { 503 return NULL; 504 } 505 506 static inline void br_multicast_add_port(struct net_bridge_port *port) 507 { 508 } 509 510 static inline void br_multicast_del_port(struct net_bridge_port *port) 511 { 512 } 513 514 static inline void br_multicast_enable_port(struct net_bridge_port *port) 515 { 516 } 517 518 static inline void br_multicast_disable_port(struct net_bridge_port *port) 519 { 520 } 521 522 static inline void br_multicast_init(struct net_bridge *br) 523 { 524 } 525 526 static inline void br_multicast_open(struct net_bridge *br) 527 { 528 } 529 530 static inline void br_multicast_stop(struct net_bridge *br) 531 { 532 } 533 534 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 535 struct sk_buff *skb) 536 { 537 } 538 539 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 540 struct sk_buff *skb, 541 struct sk_buff *skb2) 542 { 543 } 544 static inline bool br_multicast_is_router(struct net_bridge *br) 545 { 546 return 0; 547 } 548 static inline bool br_multicast_querier_exists(struct net_bridge *br) 549 { 550 return false; 551 } 552 static inline void br_mdb_init(void) 553 { 554 } 555 static inline void br_mdb_uninit(void) 556 { 557 } 558 #endif 559 560 /* br_vlan.c */ 561 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 562 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 563 struct sk_buff *skb, u16 *vid); 564 extern bool br_allowed_egress(struct net_bridge *br, 565 const struct net_port_vlans *v, 566 const struct sk_buff *skb); 567 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 568 const struct net_port_vlans *v, 569 struct sk_buff *skb); 570 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 571 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 572 extern void br_vlan_flush(struct net_bridge *br); 573 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 574 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 575 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 576 extern void nbp_vlan_flush(struct net_bridge_port *port); 577 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 578 579 static inline struct net_port_vlans *br_get_vlan_info( 580 const struct net_bridge *br) 581 { 582 return rcu_dereference_rtnl(br->vlan_info); 583 } 584 585 static inline struct net_port_vlans *nbp_get_vlan_info( 586 const struct net_bridge_port *p) 587 { 588 return rcu_dereference_rtnl(p->vlan_info); 589 } 590 591 /* Since bridge now depends on 8021Q module, but the time bridge sees the 592 * skb, the vlan tag will always be present if the frame was tagged. 593 */ 594 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 595 { 596 int err = 0; 597 598 if (vlan_tx_tag_present(skb)) 599 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 600 else { 601 *vid = 0; 602 err = -EINVAL; 603 } 604 605 return err; 606 } 607 608 static inline u16 br_get_pvid(const struct net_port_vlans *v) 609 { 610 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 611 * vid wasn't set 612 */ 613 smp_rmb(); 614 return (v->pvid & VLAN_TAG_PRESENT) ? 615 (v->pvid & ~VLAN_TAG_PRESENT) : 616 VLAN_N_VID; 617 } 618 619 #else 620 static inline bool br_allowed_ingress(struct net_bridge *br, 621 struct net_port_vlans *v, 622 struct sk_buff *skb, 623 u16 *vid) 624 { 625 return true; 626 } 627 628 static inline bool br_allowed_egress(struct net_bridge *br, 629 const struct net_port_vlans *v, 630 const struct sk_buff *skb) 631 { 632 return true; 633 } 634 635 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 636 const struct net_port_vlans *v, 637 struct sk_buff *skb) 638 { 639 return skb; 640 } 641 642 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 643 { 644 return -EOPNOTSUPP; 645 } 646 647 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 648 { 649 return -EOPNOTSUPP; 650 } 651 652 static inline void br_vlan_flush(struct net_bridge *br) 653 { 654 } 655 656 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 657 { 658 return -EOPNOTSUPP; 659 } 660 661 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 662 { 663 return -EOPNOTSUPP; 664 } 665 666 static inline void nbp_vlan_flush(struct net_bridge_port *port) 667 { 668 } 669 670 static inline struct net_port_vlans *br_get_vlan_info( 671 const struct net_bridge *br) 672 { 673 return NULL; 674 } 675 static inline struct net_port_vlans *nbp_get_vlan_info( 676 const struct net_bridge_port *p) 677 { 678 return NULL; 679 } 680 681 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 682 { 683 return false; 684 } 685 686 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 687 { 688 return 0; 689 } 690 static inline u16 br_get_pvid(const struct net_port_vlans *v) 691 { 692 return VLAN_N_VID; /* Returns invalid vid */ 693 } 694 #endif 695 696 /* br_netfilter.c */ 697 #ifdef CONFIG_BRIDGE_NETFILTER 698 extern int br_netfilter_init(void); 699 extern void br_netfilter_fini(void); 700 extern void br_netfilter_rtable_init(struct net_bridge *); 701 #else 702 #define br_netfilter_init() (0) 703 #define br_netfilter_fini() do { } while(0) 704 #define br_netfilter_rtable_init(x) 705 #endif 706 707 /* br_stp.c */ 708 extern void br_log_state(const struct net_bridge_port *p); 709 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 710 u16 port_no); 711 extern void br_init_port(struct net_bridge_port *p); 712 extern void br_become_designated_port(struct net_bridge_port *p); 713 714 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 715 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 716 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 717 718 719 /* br_stp_if.c */ 720 extern void br_stp_enable_bridge(struct net_bridge *br); 721 extern void br_stp_disable_bridge(struct net_bridge *br); 722 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 723 extern void br_stp_enable_port(struct net_bridge_port *p); 724 extern void br_stp_disable_port(struct net_bridge_port *p); 725 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 726 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 727 extern void br_stp_set_bridge_priority(struct net_bridge *br, 728 u16 newprio); 729 extern int br_stp_set_port_priority(struct net_bridge_port *p, 730 unsigned long newprio); 731 extern int br_stp_set_path_cost(struct net_bridge_port *p, 732 unsigned long path_cost); 733 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 734 735 /* br_stp_bpdu.c */ 736 struct stp_proto; 737 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 738 struct net_device *dev); 739 740 /* br_stp_timer.c */ 741 extern void br_stp_timer_init(struct net_bridge *br); 742 extern void br_stp_port_timer_init(struct net_bridge_port *p); 743 extern unsigned long br_timer_value(const struct timer_list *timer); 744 745 /* br.c */ 746 #if IS_ENABLED(CONFIG_ATM_LANE) 747 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 748 #endif 749 750 /* br_netlink.c */ 751 extern struct rtnl_link_ops br_link_ops; 752 extern int br_netlink_init(void); 753 extern void br_netlink_fini(void); 754 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 755 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 756 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 757 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 758 struct net_device *dev, u32 filter_mask); 759 760 #ifdef CONFIG_SYSFS 761 /* br_sysfs_if.c */ 762 extern const struct sysfs_ops brport_sysfs_ops; 763 extern int br_sysfs_addif(struct net_bridge_port *p); 764 extern int br_sysfs_renameif(struct net_bridge_port *p); 765 766 /* br_sysfs_br.c */ 767 extern int br_sysfs_addbr(struct net_device *dev); 768 extern void br_sysfs_delbr(struct net_device *dev); 769 770 #else 771 772 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 773 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 774 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 775 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 776 #endif /* CONFIG_SYSFS */ 777 778 #endif 779