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 162 163 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 164 u32 multicast_startup_queries_sent; 165 unsigned char multicast_router; 166 struct timer_list multicast_router_timer; 167 struct timer_list multicast_query_timer; 168 struct hlist_head mglist; 169 struct hlist_node rlist; 170 #endif 171 172 #ifdef CONFIG_SYSFS 173 char sysfs_name[IFNAMSIZ]; 174 #endif 175 176 #ifdef CONFIG_NET_POLL_CONTROLLER 177 struct netpoll *np; 178 #endif 179 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 180 struct net_port_vlans __rcu *vlan_info; 181 #endif 182 }; 183 184 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 185 186 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 187 { 188 struct net_bridge_port *port = 189 rcu_dereference_rtnl(dev->rx_handler_data); 190 191 return br_port_exists(dev) ? port : NULL; 192 } 193 194 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 195 { 196 return br_port_exists(dev) ? 197 rtnl_dereference(dev->rx_handler_data) : NULL; 198 } 199 200 struct br_cpu_netstats { 201 u64 rx_packets; 202 u64 rx_bytes; 203 u64 tx_packets; 204 u64 tx_bytes; 205 struct u64_stats_sync syncp; 206 }; 207 208 struct net_bridge 209 { 210 spinlock_t lock; 211 struct list_head port_list; 212 struct net_device *dev; 213 214 struct br_cpu_netstats __percpu *stats; 215 spinlock_t hash_lock; 216 struct hlist_head hash[BR_HASH_SIZE]; 217 #ifdef CONFIG_BRIDGE_NETFILTER 218 struct rtable fake_rtable; 219 bool nf_call_iptables; 220 bool nf_call_ip6tables; 221 bool nf_call_arptables; 222 #endif 223 u16 group_fwd_mask; 224 225 /* STP */ 226 bridge_id designated_root; 227 bridge_id bridge_id; 228 u32 root_path_cost; 229 unsigned long max_age; 230 unsigned long hello_time; 231 unsigned long forward_delay; 232 unsigned long bridge_max_age; 233 unsigned long ageing_time; 234 unsigned long bridge_hello_time; 235 unsigned long bridge_forward_delay; 236 237 u8 group_addr[ETH_ALEN]; 238 u16 root_port; 239 240 enum { 241 BR_NO_STP, /* no spanning tree */ 242 BR_KERNEL_STP, /* old STP in kernel */ 243 BR_USER_STP, /* new RSTP in userspace */ 244 } stp_enabled; 245 246 unsigned char topology_change; 247 unsigned char topology_change_detected; 248 249 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 250 unsigned char multicast_router; 251 252 u8 multicast_disabled:1; 253 u8 multicast_querier:1; 254 u8 multicast_query_use_ifaddr:1; 255 256 u32 hash_elasticity; 257 u32 hash_max; 258 259 u32 multicast_last_member_count; 260 u32 multicast_startup_queries_sent; 261 u32 multicast_startup_query_count; 262 263 unsigned long multicast_last_member_interval; 264 unsigned long multicast_membership_interval; 265 unsigned long multicast_querier_interval; 266 unsigned long multicast_query_interval; 267 unsigned long multicast_query_response_interval; 268 unsigned long multicast_startup_query_interval; 269 270 spinlock_t multicast_lock; 271 struct net_bridge_mdb_htable __rcu *mdb; 272 struct hlist_head router_list; 273 274 struct timer_list multicast_router_timer; 275 struct timer_list multicast_querier_timer; 276 struct timer_list multicast_query_timer; 277 #endif 278 279 struct timer_list hello_timer; 280 struct timer_list tcn_timer; 281 struct timer_list topology_change_timer; 282 struct timer_list gc_timer; 283 struct kobject *ifobj; 284 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 285 u8 vlan_enabled; 286 struct net_port_vlans __rcu *vlan_info; 287 #endif 288 }; 289 290 struct br_input_skb_cb { 291 struct net_device *brdev; 292 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 293 int igmp; 294 int mrouters_only; 295 #endif 296 }; 297 298 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 299 300 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 301 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 302 #else 303 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 304 #endif 305 306 #define br_printk(level, br, format, args...) \ 307 printk(level "%s: " format, (br)->dev->name, ##args) 308 309 #define br_err(__br, format, args...) \ 310 br_printk(KERN_ERR, __br, format, ##args) 311 #define br_warn(__br, format, args...) \ 312 br_printk(KERN_WARNING, __br, format, ##args) 313 #define br_notice(__br, format, args...) \ 314 br_printk(KERN_NOTICE, __br, format, ##args) 315 #define br_info(__br, format, args...) \ 316 br_printk(KERN_INFO, __br, format, ##args) 317 318 #define br_debug(br, format, args...) \ 319 pr_debug("%s: " format, (br)->dev->name, ##args) 320 321 extern struct notifier_block br_device_notifier; 322 323 /* called under bridge lock */ 324 static inline int br_is_root_bridge(const struct net_bridge *br) 325 { 326 return !memcmp(&br->bridge_id, &br->designated_root, 8); 327 } 328 329 /* br_device.c */ 330 extern void br_dev_setup(struct net_device *dev); 331 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 332 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 333 struct net_device *dev); 334 #ifdef CONFIG_NET_POLL_CONTROLLER 335 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 336 { 337 return br->dev->npinfo; 338 } 339 340 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 341 struct sk_buff *skb) 342 { 343 struct netpoll *np = p->np; 344 345 if (np) 346 netpoll_send_skb(np, skb); 347 } 348 349 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 350 extern void br_netpoll_disable(struct net_bridge_port *p); 351 #else 352 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 353 { 354 return NULL; 355 } 356 357 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 358 struct sk_buff *skb) 359 { 360 } 361 362 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 363 { 364 return 0; 365 } 366 367 static inline void br_netpoll_disable(struct net_bridge_port *p) 368 { 369 } 370 #endif 371 372 /* br_fdb.c */ 373 extern int br_fdb_init(void); 374 extern void br_fdb_fini(void); 375 extern void br_fdb_flush(struct net_bridge *br); 376 extern void br_fdb_changeaddr(struct net_bridge_port *p, 377 const unsigned char *newaddr); 378 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 379 extern void br_fdb_cleanup(unsigned long arg); 380 extern void br_fdb_delete_by_port(struct net_bridge *br, 381 const struct net_bridge_port *p, int do_all); 382 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 383 const unsigned char *addr, 384 __u16 vid); 385 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 386 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 387 unsigned long count, unsigned long off); 388 extern int br_fdb_insert(struct net_bridge *br, 389 struct net_bridge_port *source, 390 const unsigned char *addr, 391 u16 vid); 392 extern void br_fdb_update(struct net_bridge *br, 393 struct net_bridge_port *source, 394 const unsigned char *addr, 395 u16 vid); 396 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 397 398 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 399 struct net_device *dev, 400 const unsigned char *addr); 401 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 402 struct net_device *dev, 403 const unsigned char *addr, 404 u16 nlh_flags); 405 extern int br_fdb_dump(struct sk_buff *skb, 406 struct netlink_callback *cb, 407 struct net_device *dev, 408 int idx); 409 410 /* br_forward.c */ 411 extern void br_deliver(const struct net_bridge_port *to, 412 struct sk_buff *skb); 413 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 414 extern void br_forward(const struct net_bridge_port *to, 415 struct sk_buff *skb, struct sk_buff *skb0); 416 extern int br_forward_finish(struct sk_buff *skb); 417 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 418 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 419 struct sk_buff *skb2); 420 421 /* br_if.c */ 422 extern void br_port_carrier_check(struct net_bridge_port *p); 423 extern int br_add_bridge(struct net *net, const char *name); 424 extern int br_del_bridge(struct net *net, const char *name); 425 extern void br_net_exit(struct net *net); 426 extern int br_add_if(struct net_bridge *br, 427 struct net_device *dev); 428 extern int br_del_if(struct net_bridge *br, 429 struct net_device *dev); 430 extern int br_min_mtu(const struct net_bridge *br); 431 extern netdev_features_t br_features_recompute(struct net_bridge *br, 432 netdev_features_t features); 433 434 /* br_input.c */ 435 extern int br_handle_frame_finish(struct sk_buff *skb); 436 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 437 438 /* br_ioctl.c */ 439 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 440 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 441 442 /* br_multicast.c */ 443 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 444 extern unsigned int br_mdb_rehash_seq; 445 extern int br_multicast_rcv(struct net_bridge *br, 446 struct net_bridge_port *port, 447 struct sk_buff *skb); 448 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 449 struct sk_buff *skb, u16 vid); 450 extern void br_multicast_add_port(struct net_bridge_port *port); 451 extern void br_multicast_del_port(struct net_bridge_port *port); 452 extern void br_multicast_enable_port(struct net_bridge_port *port); 453 extern void br_multicast_disable_port(struct net_bridge_port *port); 454 extern void br_multicast_init(struct net_bridge *br); 455 extern void br_multicast_open(struct net_bridge *br); 456 extern void br_multicast_stop(struct net_bridge *br); 457 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 458 struct sk_buff *skb); 459 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 460 struct sk_buff *skb, struct sk_buff *skb2); 461 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 462 extern int br_multicast_set_port_router(struct net_bridge_port *p, 463 unsigned long val); 464 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 465 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 466 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 467 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 468 struct net_bridge_mdb_htable *mdb, 469 struct br_ip *dst); 470 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 471 struct net_bridge_port *port, struct br_ip *group); 472 extern void br_multicast_free_pg(struct rcu_head *head); 473 extern struct net_bridge_port_group *br_multicast_new_port_group( 474 struct net_bridge_port *port, 475 struct br_ip *group, 476 struct net_bridge_port_group *next, 477 unsigned char state); 478 extern void br_mdb_init(void); 479 extern void br_mdb_uninit(void); 480 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 481 struct br_ip *group, int type); 482 483 #define mlock_dereference(X, br) \ 484 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 485 486 #if IS_ENABLED(CONFIG_IPV6) 487 #include <net/addrconf.h> 488 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 489 { 490 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 491 return 1; 492 return 0; 493 } 494 #endif 495 496 static inline bool br_multicast_is_router(struct net_bridge *br) 497 { 498 return br->multicast_router == 2 || 499 (br->multicast_router == 1 && 500 timer_pending(&br->multicast_router_timer)); 501 } 502 #else 503 static inline int br_multicast_rcv(struct net_bridge *br, 504 struct net_bridge_port *port, 505 struct sk_buff *skb) 506 { 507 return 0; 508 } 509 510 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 511 struct sk_buff *skb, u16 vid) 512 { 513 return NULL; 514 } 515 516 static inline void br_multicast_add_port(struct net_bridge_port *port) 517 { 518 } 519 520 static inline void br_multicast_del_port(struct net_bridge_port *port) 521 { 522 } 523 524 static inline void br_multicast_enable_port(struct net_bridge_port *port) 525 { 526 } 527 528 static inline void br_multicast_disable_port(struct net_bridge_port *port) 529 { 530 } 531 532 static inline void br_multicast_init(struct net_bridge *br) 533 { 534 } 535 536 static inline void br_multicast_open(struct net_bridge *br) 537 { 538 } 539 540 static inline void br_multicast_stop(struct net_bridge *br) 541 { 542 } 543 544 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 545 struct sk_buff *skb) 546 { 547 } 548 549 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 550 struct sk_buff *skb, 551 struct sk_buff *skb2) 552 { 553 } 554 static inline bool br_multicast_is_router(struct net_bridge *br) 555 { 556 return 0; 557 } 558 static inline void br_mdb_init(void) 559 { 560 } 561 static inline void br_mdb_uninit(void) 562 { 563 } 564 #endif 565 566 /* br_vlan.c */ 567 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 568 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 569 struct sk_buff *skb, u16 *vid); 570 extern bool br_allowed_egress(struct net_bridge *br, 571 const struct net_port_vlans *v, 572 const struct sk_buff *skb); 573 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 574 const struct net_port_vlans *v, 575 struct sk_buff *skb); 576 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 577 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 578 extern void br_vlan_flush(struct net_bridge *br); 579 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 580 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 581 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 582 extern void nbp_vlan_flush(struct net_bridge_port *port); 583 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 584 585 static inline struct net_port_vlans *br_get_vlan_info( 586 const struct net_bridge *br) 587 { 588 return rcu_dereference_rtnl(br->vlan_info); 589 } 590 591 static inline struct net_port_vlans *nbp_get_vlan_info( 592 const struct net_bridge_port *p) 593 { 594 return rcu_dereference_rtnl(p->vlan_info); 595 } 596 597 /* Since bridge now depends on 8021Q module, but the time bridge sees the 598 * skb, the vlan tag will always be present if the frame was tagged. 599 */ 600 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 601 { 602 int err = 0; 603 604 if (vlan_tx_tag_present(skb)) 605 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 606 else { 607 *vid = 0; 608 err = -EINVAL; 609 } 610 611 return err; 612 } 613 614 static inline u16 br_get_pvid(const struct net_port_vlans *v) 615 { 616 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 617 * vid wasn't set 618 */ 619 smp_rmb(); 620 return (v->pvid & VLAN_TAG_PRESENT) ? 621 (v->pvid & ~VLAN_TAG_PRESENT) : 622 VLAN_N_VID; 623 } 624 625 #else 626 static inline bool br_allowed_ingress(struct net_bridge *br, 627 struct net_port_vlans *v, 628 struct sk_buff *skb, 629 u16 *vid) 630 { 631 return true; 632 } 633 634 static inline bool br_allowed_egress(struct net_bridge *br, 635 const struct net_port_vlans *v, 636 const struct sk_buff *skb) 637 { 638 return true; 639 } 640 641 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 642 const struct net_port_vlans *v, 643 struct sk_buff *skb) 644 { 645 return skb; 646 } 647 648 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 649 { 650 return -EOPNOTSUPP; 651 } 652 653 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 654 { 655 return -EOPNOTSUPP; 656 } 657 658 static inline void br_vlan_flush(struct net_bridge *br) 659 { 660 } 661 662 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 663 { 664 return -EOPNOTSUPP; 665 } 666 667 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 668 { 669 return -EOPNOTSUPP; 670 } 671 672 static inline void nbp_vlan_flush(struct net_bridge_port *port) 673 { 674 } 675 676 static inline struct net_port_vlans *br_get_vlan_info( 677 const struct net_bridge *br) 678 { 679 return NULL; 680 } 681 static inline struct net_port_vlans *nbp_get_vlan_info( 682 const struct net_bridge_port *p) 683 { 684 return NULL; 685 } 686 687 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 688 { 689 return false; 690 } 691 692 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 693 { 694 return 0; 695 } 696 static inline u16 br_get_pvid(const struct net_port_vlans *v) 697 { 698 return VLAN_N_VID; /* Returns invalid vid */ 699 } 700 #endif 701 702 /* br_netfilter.c */ 703 #ifdef CONFIG_BRIDGE_NETFILTER 704 extern int br_netfilter_init(void); 705 extern void br_netfilter_fini(void); 706 extern void br_netfilter_rtable_init(struct net_bridge *); 707 #else 708 #define br_netfilter_init() (0) 709 #define br_netfilter_fini() do { } while(0) 710 #define br_netfilter_rtable_init(x) 711 #endif 712 713 /* br_stp.c */ 714 extern void br_log_state(const struct net_bridge_port *p); 715 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 716 u16 port_no); 717 extern void br_init_port(struct net_bridge_port *p); 718 extern void br_become_designated_port(struct net_bridge_port *p); 719 720 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 721 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 722 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 723 724 725 /* br_stp_if.c */ 726 extern void br_stp_enable_bridge(struct net_bridge *br); 727 extern void br_stp_disable_bridge(struct net_bridge *br); 728 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 729 extern void br_stp_enable_port(struct net_bridge_port *p); 730 extern void br_stp_disable_port(struct net_bridge_port *p); 731 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 732 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 733 extern void br_stp_set_bridge_priority(struct net_bridge *br, 734 u16 newprio); 735 extern int br_stp_set_port_priority(struct net_bridge_port *p, 736 unsigned long newprio); 737 extern int br_stp_set_path_cost(struct net_bridge_port *p, 738 unsigned long path_cost); 739 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 740 741 /* br_stp_bpdu.c */ 742 struct stp_proto; 743 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 744 struct net_device *dev); 745 746 /* br_stp_timer.c */ 747 extern void br_stp_timer_init(struct net_bridge *br); 748 extern void br_stp_port_timer_init(struct net_bridge_port *p); 749 extern unsigned long br_timer_value(const struct timer_list *timer); 750 751 /* br.c */ 752 #if IS_ENABLED(CONFIG_ATM_LANE) 753 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 754 #endif 755 756 /* br_netlink.c */ 757 extern struct rtnl_link_ops br_link_ops; 758 extern int br_netlink_init(void); 759 extern void br_netlink_fini(void); 760 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 761 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 762 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 763 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 764 struct net_device *dev, u32 filter_mask); 765 766 #ifdef CONFIG_SYSFS 767 /* br_sysfs_if.c */ 768 extern const struct sysfs_ops brport_sysfs_ops; 769 extern int br_sysfs_addif(struct net_bridge_port *p); 770 extern int br_sysfs_renameif(struct net_bridge_port *p); 771 772 /* br_sysfs_br.c */ 773 extern int br_sysfs_addbr(struct net_device *dev); 774 extern void br_sysfs_delbr(struct net_device *dev); 775 776 #else 777 778 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 779 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 780 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 781 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 782 #endif /* CONFIG_SYSFS */ 783 784 #endif 785