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 struct netpoll_info *br_netpoll_info(struct net_bridge *br) 337 { 338 return br->dev->npinfo; 339 } 340 341 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 342 struct sk_buff *skb) 343 { 344 struct netpoll *np = p->np; 345 346 if (np) 347 netpoll_send_skb(np, skb); 348 } 349 350 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 351 extern void br_netpoll_disable(struct net_bridge_port *p); 352 #else 353 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 354 { 355 return NULL; 356 } 357 358 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 359 struct sk_buff *skb) 360 { 361 } 362 363 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 364 { 365 return 0; 366 } 367 368 static inline void br_netpoll_disable(struct net_bridge_port *p) 369 { 370 } 371 #endif 372 373 /* br_fdb.c */ 374 extern int br_fdb_init(void); 375 extern void br_fdb_fini(void); 376 extern void br_fdb_flush(struct net_bridge *br); 377 extern void br_fdb_changeaddr(struct net_bridge_port *p, 378 const unsigned char *newaddr); 379 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 380 extern void br_fdb_cleanup(unsigned long arg); 381 extern void br_fdb_delete_by_port(struct net_bridge *br, 382 const struct net_bridge_port *p, int do_all); 383 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 384 const unsigned char *addr, 385 __u16 vid); 386 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 387 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 388 unsigned long count, unsigned long off); 389 extern int br_fdb_insert(struct net_bridge *br, 390 struct net_bridge_port *source, 391 const unsigned char *addr, 392 u16 vid); 393 extern void br_fdb_update(struct net_bridge *br, 394 struct net_bridge_port *source, 395 const unsigned char *addr, 396 u16 vid); 397 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 398 399 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 400 struct net_device *dev, 401 const unsigned char *addr); 402 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 403 struct net_device *dev, 404 const unsigned char *addr, 405 u16 nlh_flags); 406 extern int br_fdb_dump(struct sk_buff *skb, 407 struct netlink_callback *cb, 408 struct net_device *dev, 409 int idx); 410 411 /* br_forward.c */ 412 extern void br_deliver(const struct net_bridge_port *to, 413 struct sk_buff *skb); 414 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 415 extern void br_forward(const struct net_bridge_port *to, 416 struct sk_buff *skb, struct sk_buff *skb0); 417 extern int br_forward_finish(struct sk_buff *skb); 418 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 419 bool unicast); 420 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 421 struct sk_buff *skb2, bool unicast); 422 423 /* br_if.c */ 424 extern void br_port_carrier_check(struct net_bridge_port *p); 425 extern int br_add_bridge(struct net *net, const char *name); 426 extern int br_del_bridge(struct net *net, const char *name); 427 extern void br_net_exit(struct net *net); 428 extern int br_add_if(struct net_bridge *br, 429 struct net_device *dev); 430 extern int br_del_if(struct net_bridge *br, 431 struct net_device *dev); 432 extern int br_min_mtu(const struct net_bridge *br); 433 extern netdev_features_t br_features_recompute(struct net_bridge *br, 434 netdev_features_t features); 435 436 /* br_input.c */ 437 extern int br_handle_frame_finish(struct sk_buff *skb); 438 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 439 440 /* br_ioctl.c */ 441 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 442 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 443 444 /* br_multicast.c */ 445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 446 extern unsigned int br_mdb_rehash_seq; 447 extern int br_multicast_rcv(struct net_bridge *br, 448 struct net_bridge_port *port, 449 struct sk_buff *skb); 450 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 451 struct sk_buff *skb, u16 vid); 452 extern void br_multicast_add_port(struct net_bridge_port *port); 453 extern void br_multicast_del_port(struct net_bridge_port *port); 454 extern void br_multicast_enable_port(struct net_bridge_port *port); 455 extern void br_multicast_disable_port(struct net_bridge_port *port); 456 extern void br_multicast_init(struct net_bridge *br); 457 extern void br_multicast_open(struct net_bridge *br); 458 extern void br_multicast_stop(struct net_bridge *br); 459 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 460 struct sk_buff *skb); 461 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 462 struct sk_buff *skb, struct sk_buff *skb2); 463 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 464 extern int br_multicast_set_port_router(struct net_bridge_port *p, 465 unsigned long val); 466 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 467 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 468 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 469 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 470 struct net_bridge_mdb_htable *mdb, 471 struct br_ip *dst); 472 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 473 struct net_bridge_port *port, struct br_ip *group); 474 extern void br_multicast_free_pg(struct rcu_head *head); 475 extern struct net_bridge_port_group *br_multicast_new_port_group( 476 struct net_bridge_port *port, 477 struct br_ip *group, 478 struct net_bridge_port_group *next, 479 unsigned char state); 480 extern void br_mdb_init(void); 481 extern void br_mdb_uninit(void); 482 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 483 struct br_ip *group, int type); 484 485 #define mlock_dereference(X, br) \ 486 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 487 488 #if IS_ENABLED(CONFIG_IPV6) 489 #include <net/addrconf.h> 490 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 491 { 492 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 493 return 1; 494 return 0; 495 } 496 #endif 497 498 static inline bool br_multicast_is_router(struct net_bridge *br) 499 { 500 return br->multicast_router == 2 || 501 (br->multicast_router == 1 && 502 timer_pending(&br->multicast_router_timer)); 503 } 504 #else 505 static inline int br_multicast_rcv(struct net_bridge *br, 506 struct net_bridge_port *port, 507 struct sk_buff *skb) 508 { 509 return 0; 510 } 511 512 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 513 struct sk_buff *skb, u16 vid) 514 { 515 return NULL; 516 } 517 518 static inline void br_multicast_add_port(struct net_bridge_port *port) 519 { 520 } 521 522 static inline void br_multicast_del_port(struct net_bridge_port *port) 523 { 524 } 525 526 static inline void br_multicast_enable_port(struct net_bridge_port *port) 527 { 528 } 529 530 static inline void br_multicast_disable_port(struct net_bridge_port *port) 531 { 532 } 533 534 static inline void br_multicast_init(struct net_bridge *br) 535 { 536 } 537 538 static inline void br_multicast_open(struct net_bridge *br) 539 { 540 } 541 542 static inline void br_multicast_stop(struct net_bridge *br) 543 { 544 } 545 546 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 547 struct sk_buff *skb) 548 { 549 } 550 551 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 552 struct sk_buff *skb, 553 struct sk_buff *skb2) 554 { 555 } 556 static inline bool br_multicast_is_router(struct net_bridge *br) 557 { 558 return 0; 559 } 560 static inline void br_mdb_init(void) 561 { 562 } 563 static inline void br_mdb_uninit(void) 564 { 565 } 566 #endif 567 568 /* br_vlan.c */ 569 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 570 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 571 struct sk_buff *skb, u16 *vid); 572 extern bool br_allowed_egress(struct net_bridge *br, 573 const struct net_port_vlans *v, 574 const struct sk_buff *skb); 575 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 576 const struct net_port_vlans *v, 577 struct sk_buff *skb); 578 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 579 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 580 extern void br_vlan_flush(struct net_bridge *br); 581 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 582 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 583 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 584 extern void nbp_vlan_flush(struct net_bridge_port *port); 585 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 586 587 static inline struct net_port_vlans *br_get_vlan_info( 588 const struct net_bridge *br) 589 { 590 return rcu_dereference_rtnl(br->vlan_info); 591 } 592 593 static inline struct net_port_vlans *nbp_get_vlan_info( 594 const struct net_bridge_port *p) 595 { 596 return rcu_dereference_rtnl(p->vlan_info); 597 } 598 599 /* Since bridge now depends on 8021Q module, but the time bridge sees the 600 * skb, the vlan tag will always be present if the frame was tagged. 601 */ 602 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 603 { 604 int err = 0; 605 606 if (vlan_tx_tag_present(skb)) 607 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 608 else { 609 *vid = 0; 610 err = -EINVAL; 611 } 612 613 return err; 614 } 615 616 static inline u16 br_get_pvid(const struct net_port_vlans *v) 617 { 618 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 619 * vid wasn't set 620 */ 621 smp_rmb(); 622 return (v->pvid & VLAN_TAG_PRESENT) ? 623 (v->pvid & ~VLAN_TAG_PRESENT) : 624 VLAN_N_VID; 625 } 626 627 #else 628 static inline bool br_allowed_ingress(struct net_bridge *br, 629 struct net_port_vlans *v, 630 struct sk_buff *skb, 631 u16 *vid) 632 { 633 return true; 634 } 635 636 static inline bool br_allowed_egress(struct net_bridge *br, 637 const struct net_port_vlans *v, 638 const struct sk_buff *skb) 639 { 640 return true; 641 } 642 643 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 644 const struct net_port_vlans *v, 645 struct sk_buff *skb) 646 { 647 return skb; 648 } 649 650 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 651 { 652 return -EOPNOTSUPP; 653 } 654 655 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 656 { 657 return -EOPNOTSUPP; 658 } 659 660 static inline void br_vlan_flush(struct net_bridge *br) 661 { 662 } 663 664 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 665 { 666 return -EOPNOTSUPP; 667 } 668 669 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 670 { 671 return -EOPNOTSUPP; 672 } 673 674 static inline void nbp_vlan_flush(struct net_bridge_port *port) 675 { 676 } 677 678 static inline struct net_port_vlans *br_get_vlan_info( 679 const struct net_bridge *br) 680 { 681 return NULL; 682 } 683 static inline struct net_port_vlans *nbp_get_vlan_info( 684 const struct net_bridge_port *p) 685 { 686 return NULL; 687 } 688 689 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 690 { 691 return false; 692 } 693 694 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 695 { 696 return 0; 697 } 698 static inline u16 br_get_pvid(const struct net_port_vlans *v) 699 { 700 return VLAN_N_VID; /* Returns invalid vid */ 701 } 702 #endif 703 704 /* br_netfilter.c */ 705 #ifdef CONFIG_BRIDGE_NETFILTER 706 extern int br_netfilter_init(void); 707 extern void br_netfilter_fini(void); 708 extern void br_netfilter_rtable_init(struct net_bridge *); 709 #else 710 #define br_netfilter_init() (0) 711 #define br_netfilter_fini() do { } while(0) 712 #define br_netfilter_rtable_init(x) 713 #endif 714 715 /* br_stp.c */ 716 extern void br_log_state(const struct net_bridge_port *p); 717 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 718 u16 port_no); 719 extern void br_init_port(struct net_bridge_port *p); 720 extern void br_become_designated_port(struct net_bridge_port *p); 721 722 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 723 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 724 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 725 726 727 /* br_stp_if.c */ 728 extern void br_stp_enable_bridge(struct net_bridge *br); 729 extern void br_stp_disable_bridge(struct net_bridge *br); 730 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 731 extern void br_stp_enable_port(struct net_bridge_port *p); 732 extern void br_stp_disable_port(struct net_bridge_port *p); 733 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 734 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 735 extern void br_stp_set_bridge_priority(struct net_bridge *br, 736 u16 newprio); 737 extern int br_stp_set_port_priority(struct net_bridge_port *p, 738 unsigned long newprio); 739 extern int br_stp_set_path_cost(struct net_bridge_port *p, 740 unsigned long path_cost); 741 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 742 743 /* br_stp_bpdu.c */ 744 struct stp_proto; 745 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 746 struct net_device *dev); 747 748 /* br_stp_timer.c */ 749 extern void br_stp_timer_init(struct net_bridge *br); 750 extern void br_stp_port_timer_init(struct net_bridge_port *p); 751 extern unsigned long br_timer_value(const struct timer_list *timer); 752 753 /* br.c */ 754 #if IS_ENABLED(CONFIG_ATM_LANE) 755 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 756 #endif 757 758 /* br_netlink.c */ 759 extern struct rtnl_link_ops br_link_ops; 760 extern int br_netlink_init(void); 761 extern void br_netlink_fini(void); 762 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 763 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 764 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 765 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 766 struct net_device *dev, u32 filter_mask); 767 768 #ifdef CONFIG_SYSFS 769 /* br_sysfs_if.c */ 770 extern const struct sysfs_ops brport_sysfs_ops; 771 extern int br_sysfs_addif(struct net_bridge_port *p); 772 extern int br_sysfs_renameif(struct net_bridge_port *p); 773 774 /* br_sysfs_br.c */ 775 extern int br_sysfs_addbr(struct net_device *dev); 776 extern void br_sysfs_delbr(struct net_device *dev); 777 778 #else 779 780 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 781 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 782 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 783 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 784 #endif /* CONFIG_SYSFS */ 785 786 #endif 787