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 }; 67 68 struct net_port_vlans { 69 u16 port_idx; 70 u16 pvid; 71 union { 72 struct net_bridge_port *port; 73 struct net_bridge *br; 74 } parent; 75 struct rcu_head rcu; 76 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 77 u16 num_vlans; 78 }; 79 80 struct net_bridge_fdb_entry 81 { 82 struct hlist_node hlist; 83 struct net_bridge_port *dst; 84 85 struct rcu_head rcu; 86 unsigned long updated; 87 unsigned long used; 88 mac_addr addr; 89 unsigned char is_local; 90 unsigned char is_static; 91 }; 92 93 struct net_bridge_port_group { 94 struct net_bridge_port *port; 95 struct net_bridge_port_group __rcu *next; 96 struct hlist_node mglist; 97 struct rcu_head rcu; 98 struct timer_list timer; 99 struct br_ip addr; 100 unsigned char state; 101 }; 102 103 struct net_bridge_mdb_entry 104 { 105 struct hlist_node hlist[2]; 106 struct net_bridge *br; 107 struct net_bridge_port_group __rcu *ports; 108 struct rcu_head rcu; 109 struct timer_list timer; 110 struct br_ip addr; 111 bool mglist; 112 }; 113 114 struct net_bridge_mdb_htable 115 { 116 struct hlist_head *mhash; 117 struct rcu_head rcu; 118 struct net_bridge_mdb_htable *old; 119 u32 size; 120 u32 max; 121 u32 secret; 122 u32 ver; 123 }; 124 125 struct net_bridge_port 126 { 127 struct net_bridge *br; 128 struct net_device *dev; 129 struct list_head list; 130 131 /* STP */ 132 u8 priority; 133 u8 state; 134 u16 port_no; 135 unsigned char topology_change_ack; 136 unsigned char config_pending; 137 port_id port_id; 138 port_id designated_port; 139 bridge_id designated_root; 140 bridge_id designated_bridge; 141 u32 path_cost; 142 u32 designated_cost; 143 unsigned long designated_age; 144 145 struct timer_list forward_delay_timer; 146 struct timer_list hold_timer; 147 struct timer_list message_age_timer; 148 struct kobject kobj; 149 struct rcu_head rcu; 150 151 unsigned long flags; 152 #define BR_HAIRPIN_MODE 0x00000001 153 #define BR_BPDU_GUARD 0x00000002 154 #define BR_ROOT_BLOCK 0x00000004 155 #define BR_MULTICAST_FAST_LEAVE 0x00000008 156 157 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 158 u32 multicast_startup_queries_sent; 159 unsigned char multicast_router; 160 struct timer_list multicast_router_timer; 161 struct timer_list multicast_query_timer; 162 struct hlist_head mglist; 163 struct hlist_node rlist; 164 #endif 165 166 #ifdef CONFIG_SYSFS 167 char sysfs_name[IFNAMSIZ]; 168 #endif 169 170 #ifdef CONFIG_NET_POLL_CONTROLLER 171 struct netpoll *np; 172 #endif 173 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 174 struct net_port_vlans __rcu *vlan_info; 175 #endif 176 }; 177 178 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 179 180 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 181 { 182 struct net_bridge_port *port = 183 rcu_dereference_rtnl(dev->rx_handler_data); 184 185 return br_port_exists(dev) ? port : NULL; 186 } 187 188 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 189 { 190 return br_port_exists(dev) ? 191 rtnl_dereference(dev->rx_handler_data) : NULL; 192 } 193 194 struct br_cpu_netstats { 195 u64 rx_packets; 196 u64 rx_bytes; 197 u64 tx_packets; 198 u64 tx_bytes; 199 struct u64_stats_sync syncp; 200 }; 201 202 struct net_bridge 203 { 204 spinlock_t lock; 205 struct list_head port_list; 206 struct net_device *dev; 207 208 struct br_cpu_netstats __percpu *stats; 209 spinlock_t hash_lock; 210 struct hlist_head hash[BR_HASH_SIZE]; 211 #ifdef CONFIG_BRIDGE_NETFILTER 212 struct rtable fake_rtable; 213 bool nf_call_iptables; 214 bool nf_call_ip6tables; 215 bool nf_call_arptables; 216 #endif 217 u16 group_fwd_mask; 218 219 /* STP */ 220 bridge_id designated_root; 221 bridge_id bridge_id; 222 u32 root_path_cost; 223 unsigned long max_age; 224 unsigned long hello_time; 225 unsigned long forward_delay; 226 unsigned long bridge_max_age; 227 unsigned long ageing_time; 228 unsigned long bridge_hello_time; 229 unsigned long bridge_forward_delay; 230 231 u8 group_addr[ETH_ALEN]; 232 u16 root_port; 233 234 enum { 235 BR_NO_STP, /* no spanning tree */ 236 BR_KERNEL_STP, /* old STP in kernel */ 237 BR_USER_STP, /* new RSTP in userspace */ 238 } stp_enabled; 239 240 unsigned char topology_change; 241 unsigned char topology_change_detected; 242 243 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 244 unsigned char multicast_router; 245 246 u8 multicast_disabled:1; 247 u8 multicast_querier:1; 248 249 u32 hash_elasticity; 250 u32 hash_max; 251 252 u32 multicast_last_member_count; 253 u32 multicast_startup_queries_sent; 254 u32 multicast_startup_query_count; 255 256 unsigned long multicast_last_member_interval; 257 unsigned long multicast_membership_interval; 258 unsigned long multicast_querier_interval; 259 unsigned long multicast_query_interval; 260 unsigned long multicast_query_response_interval; 261 unsigned long multicast_startup_query_interval; 262 263 spinlock_t multicast_lock; 264 struct net_bridge_mdb_htable __rcu *mdb; 265 struct hlist_head router_list; 266 267 struct timer_list multicast_router_timer; 268 struct timer_list multicast_querier_timer; 269 struct timer_list multicast_query_timer; 270 #endif 271 272 struct timer_list hello_timer; 273 struct timer_list tcn_timer; 274 struct timer_list topology_change_timer; 275 struct timer_list gc_timer; 276 struct kobject *ifobj; 277 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 278 u8 vlan_enabled; 279 struct net_port_vlans __rcu *vlan_info; 280 #endif 281 }; 282 283 struct br_input_skb_cb { 284 struct net_device *brdev; 285 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 286 int igmp; 287 int mrouters_only; 288 #endif 289 }; 290 291 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 292 293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 294 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 295 #else 296 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 297 #endif 298 299 #define br_printk(level, br, format, args...) \ 300 printk(level "%s: " format, (br)->dev->name, ##args) 301 302 #define br_err(__br, format, args...) \ 303 br_printk(KERN_ERR, __br, format, ##args) 304 #define br_warn(__br, format, args...) \ 305 br_printk(KERN_WARNING, __br, format, ##args) 306 #define br_notice(__br, format, args...) \ 307 br_printk(KERN_NOTICE, __br, format, ##args) 308 #define br_info(__br, format, args...) \ 309 br_printk(KERN_INFO, __br, format, ##args) 310 311 #define br_debug(br, format, args...) \ 312 pr_debug("%s: " format, (br)->dev->name, ##args) 313 314 extern struct notifier_block br_device_notifier; 315 316 /* called under bridge lock */ 317 static inline int br_is_root_bridge(const struct net_bridge *br) 318 { 319 return !memcmp(&br->bridge_id, &br->designated_root, 8); 320 } 321 322 /* br_device.c */ 323 extern void br_dev_setup(struct net_device *dev); 324 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 325 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 326 struct net_device *dev); 327 #ifdef CONFIG_NET_POLL_CONTROLLER 328 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 329 { 330 return br->dev->npinfo; 331 } 332 333 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 334 struct sk_buff *skb) 335 { 336 struct netpoll *np = p->np; 337 338 if (np) 339 netpoll_send_skb(np, skb); 340 } 341 342 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 343 extern void br_netpoll_disable(struct net_bridge_port *p); 344 #else 345 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br) 346 { 347 return NULL; 348 } 349 350 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 351 struct sk_buff *skb) 352 { 353 } 354 355 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 356 { 357 return 0; 358 } 359 360 static inline void br_netpoll_disable(struct net_bridge_port *p) 361 { 362 } 363 #endif 364 365 /* br_fdb.c */ 366 extern int br_fdb_init(void); 367 extern void br_fdb_fini(void); 368 extern void br_fdb_flush(struct net_bridge *br); 369 extern void br_fdb_changeaddr(struct net_bridge_port *p, 370 const unsigned char *newaddr); 371 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 372 extern void br_fdb_cleanup(unsigned long arg); 373 extern void br_fdb_delete_by_port(struct net_bridge *br, 374 const struct net_bridge_port *p, int do_all); 375 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 376 const unsigned char *addr); 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 extern void br_fdb_update(struct net_bridge *br, 384 struct net_bridge_port *source, 385 const unsigned char *addr); 386 387 extern int br_fdb_delete(struct ndmsg *ndm, 388 struct net_device *dev, 389 const unsigned char *addr); 390 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 391 struct net_device *dev, 392 const unsigned char *addr, 393 u16 nlh_flags); 394 extern int br_fdb_dump(struct sk_buff *skb, 395 struct netlink_callback *cb, 396 struct net_device *dev, 397 int idx); 398 399 /* br_forward.c */ 400 extern void br_deliver(const struct net_bridge_port *to, 401 struct sk_buff *skb); 402 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 403 extern void br_forward(const struct net_bridge_port *to, 404 struct sk_buff *skb, struct sk_buff *skb0); 405 extern int br_forward_finish(struct sk_buff *skb); 406 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 407 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 408 struct sk_buff *skb2); 409 410 /* br_if.c */ 411 extern void br_port_carrier_check(struct net_bridge_port *p); 412 extern int br_add_bridge(struct net *net, const char *name); 413 extern int br_del_bridge(struct net *net, const char *name); 414 extern void br_net_exit(struct net *net); 415 extern int br_add_if(struct net_bridge *br, 416 struct net_device *dev); 417 extern int br_del_if(struct net_bridge *br, 418 struct net_device *dev); 419 extern int br_min_mtu(const struct net_bridge *br); 420 extern netdev_features_t br_features_recompute(struct net_bridge *br, 421 netdev_features_t features); 422 423 /* br_input.c */ 424 extern int br_handle_frame_finish(struct sk_buff *skb); 425 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 426 427 /* br_ioctl.c */ 428 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 429 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 430 431 /* br_multicast.c */ 432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 433 extern unsigned int br_mdb_rehash_seq; 434 extern int br_multicast_rcv(struct net_bridge *br, 435 struct net_bridge_port *port, 436 struct sk_buff *skb); 437 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 438 struct sk_buff *skb); 439 extern void br_multicast_add_port(struct net_bridge_port *port); 440 extern void br_multicast_del_port(struct net_bridge_port *port); 441 extern void br_multicast_enable_port(struct net_bridge_port *port); 442 extern void br_multicast_disable_port(struct net_bridge_port *port); 443 extern void br_multicast_init(struct net_bridge *br); 444 extern void br_multicast_open(struct net_bridge *br); 445 extern void br_multicast_stop(struct net_bridge *br); 446 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 447 struct sk_buff *skb); 448 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 449 struct sk_buff *skb, struct sk_buff *skb2); 450 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 451 extern int br_multicast_set_port_router(struct net_bridge_port *p, 452 unsigned long val); 453 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 454 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 455 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 456 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 457 struct net_bridge_mdb_htable *mdb, 458 struct br_ip *dst); 459 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 460 struct net_bridge_port *port, struct br_ip *group); 461 extern void br_multicast_free_pg(struct rcu_head *head); 462 extern struct net_bridge_port_group *br_multicast_new_port_group( 463 struct net_bridge_port *port, 464 struct br_ip *group, 465 struct net_bridge_port_group *next, 466 unsigned char state); 467 extern void br_mdb_init(void); 468 extern void br_mdb_uninit(void); 469 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 470 struct br_ip *group, int type); 471 472 #define mlock_dereference(X, br) \ 473 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 474 475 #if IS_ENABLED(CONFIG_IPV6) 476 #include <net/addrconf.h> 477 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 478 { 479 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 480 return 1; 481 return 0; 482 } 483 #endif 484 485 static inline bool br_multicast_is_router(struct net_bridge *br) 486 { 487 return br->multicast_router == 2 || 488 (br->multicast_router == 1 && 489 timer_pending(&br->multicast_router_timer)); 490 } 491 #else 492 static inline int br_multicast_rcv(struct net_bridge *br, 493 struct net_bridge_port *port, 494 struct sk_buff *skb) 495 { 496 return 0; 497 } 498 499 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 500 struct sk_buff *skb) 501 { 502 return NULL; 503 } 504 505 static inline void br_multicast_add_port(struct net_bridge_port *port) 506 { 507 } 508 509 static inline void br_multicast_del_port(struct net_bridge_port *port) 510 { 511 } 512 513 static inline void br_multicast_enable_port(struct net_bridge_port *port) 514 { 515 } 516 517 static inline void br_multicast_disable_port(struct net_bridge_port *port) 518 { 519 } 520 521 static inline void br_multicast_init(struct net_bridge *br) 522 { 523 } 524 525 static inline void br_multicast_open(struct net_bridge *br) 526 { 527 } 528 529 static inline void br_multicast_stop(struct net_bridge *br) 530 { 531 } 532 533 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 534 struct sk_buff *skb) 535 { 536 } 537 538 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 539 struct sk_buff *skb, 540 struct sk_buff *skb2) 541 { 542 } 543 static inline bool br_multicast_is_router(struct net_bridge *br) 544 { 545 return 0; 546 } 547 static inline void br_mdb_init(void) 548 { 549 } 550 static inline void br_mdb_uninit(void) 551 { 552 } 553 #endif 554 555 /* br_vlan.c */ 556 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 557 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 558 struct sk_buff *skb, u16 *vid); 559 extern bool br_allowed_egress(struct net_bridge *br, 560 const struct net_port_vlans *v, 561 const struct sk_buff *skb); 562 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 563 const struct net_port_vlans *v, 564 struct sk_buff *skb); 565 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 566 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 567 extern void br_vlan_flush(struct net_bridge *br); 568 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 569 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 570 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 571 extern void nbp_vlan_flush(struct net_bridge_port *port); 572 573 static inline struct net_port_vlans *br_get_vlan_info( 574 const struct net_bridge *br) 575 { 576 return rcu_dereference(br->vlan_info); 577 } 578 579 static inline struct net_port_vlans *nbp_get_vlan_info( 580 const struct net_bridge_port *p) 581 { 582 return rcu_dereference(p->vlan_info); 583 } 584 585 /* Since bridge now depends on 8021Q module, but the time bridge sees the 586 * skb, the vlan tag will always be present if the frame was tagged. 587 */ 588 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 589 { 590 int err = 0; 591 592 if (vlan_tx_tag_present(skb)) 593 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 594 else { 595 *vid = 0; 596 err = -EINVAL; 597 } 598 599 return err; 600 } 601 602 static inline u16 br_get_pvid(const struct net_port_vlans *v) 603 { 604 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 605 * vid wasn't set 606 */ 607 smp_rmb(); 608 return (v->pvid & VLAN_TAG_PRESENT) ? 609 (v->pvid & ~VLAN_TAG_PRESENT) : 610 VLAN_N_VID; 611 } 612 613 #else 614 static inline bool br_allowed_ingress(struct net_bridge *br, 615 struct net_port_vlans *v, 616 struct sk_buff *skb, 617 u16 *vid) 618 { 619 return true; 620 } 621 622 static inline bool br_allowed_egress(struct net_bridge *br, 623 const struct net_port_vlans *v, 624 const struct sk_buff *skb) 625 { 626 return true; 627 } 628 629 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 630 const struct net_port_vlans *v, 631 struct sk_buff *skb) 632 { 633 return skb; 634 } 635 636 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 637 { 638 return -EOPNOTSUPP; 639 } 640 641 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 642 { 643 return -EOPNOTSUPP; 644 } 645 646 static inline void br_vlan_flush(struct net_bridge *br) 647 { 648 } 649 650 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 651 { 652 return -EOPNOTSUPP; 653 } 654 655 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 656 { 657 return -EOPNOTSUPP; 658 } 659 660 static inline void nbp_vlan_flush(struct net_bridge_port *port) 661 { 662 } 663 664 static inline struct net_port_vlans *br_get_vlan_info( 665 const struct net_bridge *br) 666 { 667 return NULL; 668 } 669 static inline struct net_port_vlans *nbp_get_vlan_info( 670 const struct net_bridge_port *p) 671 { 672 return NULL; 673 } 674 675 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 676 { 677 return 0; 678 } 679 static inline u16 br_get_pvid(const struct net_port_vlans *v) 680 { 681 return VLAN_N_VID; /* Returns invalid vid */ 682 } 683 #endif 684 685 /* br_netfilter.c */ 686 #ifdef CONFIG_BRIDGE_NETFILTER 687 extern int br_netfilter_init(void); 688 extern void br_netfilter_fini(void); 689 extern void br_netfilter_rtable_init(struct net_bridge *); 690 #else 691 #define br_netfilter_init() (0) 692 #define br_netfilter_fini() do { } while(0) 693 #define br_netfilter_rtable_init(x) 694 #endif 695 696 /* br_stp.c */ 697 extern void br_log_state(const struct net_bridge_port *p); 698 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 699 u16 port_no); 700 extern void br_init_port(struct net_bridge_port *p); 701 extern void br_become_designated_port(struct net_bridge_port *p); 702 703 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 704 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 705 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 706 707 708 /* br_stp_if.c */ 709 extern void br_stp_enable_bridge(struct net_bridge *br); 710 extern void br_stp_disable_bridge(struct net_bridge *br); 711 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 712 extern void br_stp_enable_port(struct net_bridge_port *p); 713 extern void br_stp_disable_port(struct net_bridge_port *p); 714 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 715 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 716 extern void br_stp_set_bridge_priority(struct net_bridge *br, 717 u16 newprio); 718 extern int br_stp_set_port_priority(struct net_bridge_port *p, 719 unsigned long newprio); 720 extern int br_stp_set_path_cost(struct net_bridge_port *p, 721 unsigned long path_cost); 722 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 723 724 /* br_stp_bpdu.c */ 725 struct stp_proto; 726 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 727 struct net_device *dev); 728 729 /* br_stp_timer.c */ 730 extern void br_stp_timer_init(struct net_bridge *br); 731 extern void br_stp_port_timer_init(struct net_bridge_port *p); 732 extern unsigned long br_timer_value(const struct timer_list *timer); 733 734 /* br.c */ 735 #if IS_ENABLED(CONFIG_ATM_LANE) 736 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 737 #endif 738 739 /* br_netlink.c */ 740 extern struct rtnl_link_ops br_link_ops; 741 extern int br_netlink_init(void); 742 extern void br_netlink_fini(void); 743 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 744 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 745 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 746 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 747 struct net_device *dev, u32 filter_mask); 748 749 #ifdef CONFIG_SYSFS 750 /* br_sysfs_if.c */ 751 extern const struct sysfs_ops brport_sysfs_ops; 752 extern int br_sysfs_addif(struct net_bridge_port *p); 753 extern int br_sysfs_renameif(struct net_bridge_port *p); 754 755 /* br_sysfs_br.c */ 756 extern int br_sysfs_addbr(struct net_device *dev); 757 extern void br_sysfs_delbr(struct net_device *dev); 758 759 #else 760 761 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 762 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 763 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 764 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 765 #endif /* CONFIG_SYSFS */ 766 767 #endif 768