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