1 /* 2 * Linux ethernet bridge 3 * 4 * Authors: 5 * Lennert Buytenhek <buytenh@gnu.org> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #ifndef _BR_PRIVATE_H 14 #define _BR_PRIVATE_H 15 16 #include <linux/netdevice.h> 17 #include <linux/if_bridge.h> 18 #include <linux/netpoll.h> 19 #include <linux/u64_stats_sync.h> 20 #include <net/route.h> 21 #include <linux/if_vlan.h> 22 23 #define BR_HASH_BITS 8 24 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 25 26 #define BR_HOLD_TIME (1*HZ) 27 28 #define BR_PORT_BITS 10 29 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 30 #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID) 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding control protocols like STP and LLDP */ 37 #define BR_GROUPFWD_RESTRICTED 0x4007u 38 39 /* Path to usermode spanning tree program */ 40 #define BR_STP_PROG "/sbin/bridge-stp" 41 42 typedef struct bridge_id bridge_id; 43 typedef struct mac_addr mac_addr; 44 typedef __u16 port_id; 45 46 struct bridge_id 47 { 48 unsigned char prio[2]; 49 unsigned char addr[6]; 50 }; 51 52 struct mac_addr 53 { 54 unsigned char addr[6]; 55 }; 56 57 struct br_ip 58 { 59 union { 60 __be32 ip4; 61 #if IS_ENABLED(CONFIG_IPV6) 62 struct in6_addr ip6; 63 #endif 64 } u; 65 __be16 proto; 66 __u16 vid; 67 }; 68 69 struct net_port_vlans { 70 u16 port_idx; 71 u16 pvid; 72 union { 73 struct net_bridge_port *port; 74 struct net_bridge *br; 75 } parent; 76 struct rcu_head rcu; 77 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 78 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 79 u16 num_vlans; 80 }; 81 82 struct net_bridge_fdb_entry 83 { 84 struct hlist_node hlist; 85 struct net_bridge_port *dst; 86 87 struct rcu_head rcu; 88 unsigned long updated; 89 unsigned long used; 90 mac_addr addr; 91 unsigned char is_local; 92 unsigned char is_static; 93 __u16 vlan_id; 94 }; 95 96 struct net_bridge_port_group { 97 struct net_bridge_port *port; 98 struct net_bridge_port_group __rcu *next; 99 struct hlist_node mglist; 100 struct rcu_head rcu; 101 struct timer_list timer; 102 struct br_ip addr; 103 unsigned char state; 104 }; 105 106 struct net_bridge_mdb_entry 107 { 108 struct hlist_node hlist[2]; 109 struct net_bridge *br; 110 struct net_bridge_port_group __rcu *ports; 111 struct rcu_head rcu; 112 struct timer_list timer; 113 struct br_ip addr; 114 bool mglist; 115 bool timer_armed; 116 }; 117 118 struct net_bridge_mdb_htable 119 { 120 struct hlist_head *mhash; 121 struct rcu_head rcu; 122 struct net_bridge_mdb_htable *old; 123 u32 size; 124 u32 max; 125 u32 secret; 126 u32 ver; 127 }; 128 129 struct net_bridge_port 130 { 131 struct net_bridge *br; 132 struct net_device *dev; 133 struct list_head list; 134 135 /* STP */ 136 u8 priority; 137 u8 state; 138 u16 port_no; 139 unsigned char topology_change_ack; 140 unsigned char config_pending; 141 port_id port_id; 142 port_id designated_port; 143 bridge_id designated_root; 144 bridge_id designated_bridge; 145 u32 path_cost; 146 u32 designated_cost; 147 unsigned long designated_age; 148 149 struct timer_list forward_delay_timer; 150 struct timer_list hold_timer; 151 struct timer_list message_age_timer; 152 struct kobject kobj; 153 struct rcu_head rcu; 154 155 unsigned long flags; 156 #define BR_HAIRPIN_MODE 0x00000001 157 #define BR_BPDU_GUARD 0x00000002 158 #define BR_ROOT_BLOCK 0x00000004 159 #define BR_MULTICAST_FAST_LEAVE 0x00000008 160 #define BR_ADMIN_COST 0x00000010 161 #define BR_LEARNING 0x00000020 162 #define BR_FLOOD 0x00000040 163 164 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 165 u32 multicast_startup_queries_sent; 166 unsigned char multicast_router; 167 struct timer_list multicast_router_timer; 168 struct timer_list multicast_query_timer; 169 struct hlist_head mglist; 170 struct hlist_node rlist; 171 #endif 172 173 #ifdef CONFIG_SYSFS 174 char sysfs_name[IFNAMSIZ]; 175 #endif 176 177 #ifdef CONFIG_NET_POLL_CONTROLLER 178 struct netpoll *np; 179 #endif 180 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 181 struct net_port_vlans __rcu *vlan_info; 182 #endif 183 }; 184 185 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 186 187 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 188 { 189 struct net_bridge_port *port = 190 rcu_dereference_rtnl(dev->rx_handler_data); 191 192 return br_port_exists(dev) ? port : NULL; 193 } 194 195 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev) 196 { 197 return br_port_exists(dev) ? 198 rtnl_dereference(dev->rx_handler_data) : NULL; 199 } 200 201 struct br_cpu_netstats { 202 u64 rx_packets; 203 u64 rx_bytes; 204 u64 tx_packets; 205 u64 tx_bytes; 206 struct u64_stats_sync syncp; 207 }; 208 209 struct net_bridge 210 { 211 spinlock_t lock; 212 struct list_head port_list; 213 struct net_device *dev; 214 215 struct br_cpu_netstats __percpu *stats; 216 spinlock_t hash_lock; 217 struct hlist_head hash[BR_HASH_SIZE]; 218 #ifdef CONFIG_BRIDGE_NETFILTER 219 struct rtable fake_rtable; 220 bool nf_call_iptables; 221 bool nf_call_ip6tables; 222 bool nf_call_arptables; 223 #endif 224 u16 group_fwd_mask; 225 226 /* STP */ 227 bridge_id designated_root; 228 bridge_id bridge_id; 229 u32 root_path_cost; 230 unsigned long max_age; 231 unsigned long hello_time; 232 unsigned long forward_delay; 233 unsigned long bridge_max_age; 234 unsigned long ageing_time; 235 unsigned long bridge_hello_time; 236 unsigned long bridge_forward_delay; 237 238 u8 group_addr[ETH_ALEN]; 239 u16 root_port; 240 241 enum { 242 BR_NO_STP, /* no spanning tree */ 243 BR_KERNEL_STP, /* old STP in kernel */ 244 BR_USER_STP, /* new RSTP in userspace */ 245 } stp_enabled; 246 247 unsigned char topology_change; 248 unsigned char topology_change_detected; 249 250 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 251 unsigned char multicast_router; 252 253 u8 multicast_disabled:1; 254 u8 multicast_querier:1; 255 u8 multicast_query_use_ifaddr:1; 256 257 u32 hash_elasticity; 258 u32 hash_max; 259 260 u32 multicast_last_member_count; 261 u32 multicast_startup_queries_sent; 262 u32 multicast_startup_query_count; 263 264 unsigned long multicast_last_member_interval; 265 unsigned long multicast_membership_interval; 266 unsigned long multicast_querier_interval; 267 unsigned long multicast_query_interval; 268 unsigned long multicast_query_response_interval; 269 unsigned long multicast_startup_query_interval; 270 unsigned long multicast_querier_delay_time; 271 272 spinlock_t multicast_lock; 273 struct net_bridge_mdb_htable __rcu *mdb; 274 struct hlist_head router_list; 275 276 struct timer_list multicast_router_timer; 277 struct timer_list multicast_querier_timer; 278 struct timer_list multicast_query_timer; 279 #endif 280 281 struct timer_list hello_timer; 282 struct timer_list tcn_timer; 283 struct timer_list topology_change_timer; 284 struct timer_list gc_timer; 285 struct kobject *ifobj; 286 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 287 u8 vlan_enabled; 288 struct net_port_vlans __rcu *vlan_info; 289 #endif 290 }; 291 292 struct br_input_skb_cb { 293 struct net_device *brdev; 294 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 295 int igmp; 296 int mrouters_only; 297 #endif 298 }; 299 300 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 301 302 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 303 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 304 #else 305 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 306 #endif 307 308 #define br_printk(level, br, format, args...) \ 309 printk(level "%s: " format, (br)->dev->name, ##args) 310 311 #define br_err(__br, format, args...) \ 312 br_printk(KERN_ERR, __br, format, ##args) 313 #define br_warn(__br, format, args...) \ 314 br_printk(KERN_WARNING, __br, format, ##args) 315 #define br_notice(__br, format, args...) \ 316 br_printk(KERN_NOTICE, __br, format, ##args) 317 #define br_info(__br, format, args...) \ 318 br_printk(KERN_INFO, __br, format, ##args) 319 320 #define br_debug(br, format, args...) \ 321 pr_debug("%s: " format, (br)->dev->name, ##args) 322 323 extern struct notifier_block br_device_notifier; 324 325 /* called under bridge lock */ 326 static inline int br_is_root_bridge(const struct net_bridge *br) 327 { 328 return !memcmp(&br->bridge_id, &br->designated_root, 8); 329 } 330 331 /* br_device.c */ 332 extern void br_dev_setup(struct net_device *dev); 333 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 334 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 335 struct net_device *dev); 336 #ifdef CONFIG_NET_POLL_CONTROLLER 337 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 338 struct sk_buff *skb) 339 { 340 struct netpoll *np = p->np; 341 342 if (np) 343 netpoll_send_skb(np, skb); 344 } 345 346 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 347 extern void br_netpoll_disable(struct net_bridge_port *p); 348 #else 349 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 350 struct sk_buff *skb) 351 { 352 } 353 354 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 355 { 356 return 0; 357 } 358 359 static inline void br_netpoll_disable(struct net_bridge_port *p) 360 { 361 } 362 #endif 363 364 /* br_fdb.c */ 365 extern int br_fdb_init(void); 366 extern void br_fdb_fini(void); 367 extern void br_fdb_flush(struct net_bridge *br); 368 extern void br_fdb_changeaddr(struct net_bridge_port *p, 369 const unsigned char *newaddr); 370 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 371 extern void br_fdb_cleanup(unsigned long arg); 372 extern void br_fdb_delete_by_port(struct net_bridge *br, 373 const struct net_bridge_port *p, int do_all); 374 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 375 const unsigned char *addr, 376 __u16 vid); 377 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 378 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 379 unsigned long count, unsigned long off); 380 extern int br_fdb_insert(struct net_bridge *br, 381 struct net_bridge_port *source, 382 const unsigned char *addr, 383 u16 vid); 384 extern void br_fdb_update(struct net_bridge *br, 385 struct net_bridge_port *source, 386 const unsigned char *addr, 387 u16 vid); 388 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 389 390 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 391 struct net_device *dev, 392 const unsigned char *addr); 393 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 394 struct net_device *dev, 395 const unsigned char *addr, 396 u16 nlh_flags); 397 extern int br_fdb_dump(struct sk_buff *skb, 398 struct netlink_callback *cb, 399 struct net_device *dev, 400 int idx); 401 402 /* br_forward.c */ 403 extern void br_deliver(const struct net_bridge_port *to, 404 struct sk_buff *skb); 405 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 406 extern void br_forward(const struct net_bridge_port *to, 407 struct sk_buff *skb, struct sk_buff *skb0); 408 extern int br_forward_finish(struct sk_buff *skb); 409 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 410 bool unicast); 411 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 412 struct sk_buff *skb2, bool unicast); 413 414 /* br_if.c */ 415 extern void br_port_carrier_check(struct net_bridge_port *p); 416 extern int br_add_bridge(struct net *net, const char *name); 417 extern int br_del_bridge(struct net *net, const char *name); 418 extern void br_net_exit(struct net *net); 419 extern int br_add_if(struct net_bridge *br, 420 struct net_device *dev); 421 extern int br_del_if(struct net_bridge *br, 422 struct net_device *dev); 423 extern int br_min_mtu(const struct net_bridge *br); 424 extern netdev_features_t br_features_recompute(struct net_bridge *br, 425 netdev_features_t features); 426 427 /* br_input.c */ 428 extern int br_handle_frame_finish(struct sk_buff *skb); 429 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 430 431 /* br_ioctl.c */ 432 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 433 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 434 435 /* br_multicast.c */ 436 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 437 extern unsigned int br_mdb_rehash_seq; 438 extern int br_multicast_rcv(struct net_bridge *br, 439 struct net_bridge_port *port, 440 struct sk_buff *skb); 441 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 442 struct sk_buff *skb, u16 vid); 443 extern void br_multicast_add_port(struct net_bridge_port *port); 444 extern void br_multicast_del_port(struct net_bridge_port *port); 445 extern void br_multicast_enable_port(struct net_bridge_port *port); 446 extern void br_multicast_disable_port(struct net_bridge_port *port); 447 extern void br_multicast_init(struct net_bridge *br); 448 extern void br_multicast_open(struct net_bridge *br); 449 extern void br_multicast_stop(struct net_bridge *br); 450 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 451 struct sk_buff *skb); 452 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 453 struct sk_buff *skb, struct sk_buff *skb2); 454 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 455 extern int br_multicast_set_port_router(struct net_bridge_port *p, 456 unsigned long val); 457 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 458 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 459 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 460 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 461 struct net_bridge_mdb_htable *mdb, 462 struct br_ip *dst); 463 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 464 struct net_bridge_port *port, struct br_ip *group); 465 extern void br_multicast_free_pg(struct rcu_head *head); 466 extern struct net_bridge_port_group *br_multicast_new_port_group( 467 struct net_bridge_port *port, 468 struct br_ip *group, 469 struct net_bridge_port_group *next, 470 unsigned char state); 471 extern void br_mdb_init(void); 472 extern void br_mdb_uninit(void); 473 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 474 struct br_ip *group, int type); 475 476 #define mlock_dereference(X, br) \ 477 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 478 479 #if IS_ENABLED(CONFIG_IPV6) 480 #include <net/addrconf.h> 481 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr) 482 { 483 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr)) 484 return 1; 485 return 0; 486 } 487 #endif 488 489 static inline bool br_multicast_is_router(struct net_bridge *br) 490 { 491 return br->multicast_router == 2 || 492 (br->multicast_router == 1 && 493 timer_pending(&br->multicast_router_timer)); 494 } 495 496 static inline bool br_multicast_querier_exists(struct net_bridge *br) 497 { 498 return time_is_before_jiffies(br->multicast_querier_delay_time) && 499 (br->multicast_querier || 500 timer_pending(&br->multicast_querier_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 bool br_multicast_querier_exists(struct net_bridge *br) 559 { 560 return false; 561 } 562 static inline void br_mdb_init(void) 563 { 564 } 565 static inline void br_mdb_uninit(void) 566 { 567 } 568 #endif 569 570 /* br_vlan.c */ 571 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 572 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 573 struct sk_buff *skb, u16 *vid); 574 extern bool br_allowed_egress(struct net_bridge *br, 575 const struct net_port_vlans *v, 576 const struct sk_buff *skb); 577 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 578 const struct net_port_vlans *v, 579 struct sk_buff *skb); 580 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 581 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 582 extern void br_vlan_flush(struct net_bridge *br); 583 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 584 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 585 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 586 extern void nbp_vlan_flush(struct net_bridge_port *port); 587 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 588 589 static inline struct net_port_vlans *br_get_vlan_info( 590 const struct net_bridge *br) 591 { 592 return rcu_dereference_rtnl(br->vlan_info); 593 } 594 595 static inline struct net_port_vlans *nbp_get_vlan_info( 596 const struct net_bridge_port *p) 597 { 598 return rcu_dereference_rtnl(p->vlan_info); 599 } 600 601 /* Since bridge now depends on 8021Q module, but the time bridge sees the 602 * skb, the vlan tag will always be present if the frame was tagged. 603 */ 604 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 605 { 606 int err = 0; 607 608 if (vlan_tx_tag_present(skb)) 609 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 610 else { 611 *vid = 0; 612 err = -EINVAL; 613 } 614 615 return err; 616 } 617 618 static inline u16 br_get_pvid(const struct net_port_vlans *v) 619 { 620 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 621 * vid wasn't set 622 */ 623 smp_rmb(); 624 return (v->pvid & VLAN_TAG_PRESENT) ? 625 (v->pvid & ~VLAN_TAG_PRESENT) : 626 VLAN_N_VID; 627 } 628 629 #else 630 static inline bool br_allowed_ingress(struct net_bridge *br, 631 struct net_port_vlans *v, 632 struct sk_buff *skb, 633 u16 *vid) 634 { 635 return true; 636 } 637 638 static inline bool br_allowed_egress(struct net_bridge *br, 639 const struct net_port_vlans *v, 640 const struct sk_buff *skb) 641 { 642 return true; 643 } 644 645 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 646 const struct net_port_vlans *v, 647 struct sk_buff *skb) 648 { 649 return skb; 650 } 651 652 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 653 { 654 return -EOPNOTSUPP; 655 } 656 657 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 658 { 659 return -EOPNOTSUPP; 660 } 661 662 static inline void br_vlan_flush(struct net_bridge *br) 663 { 664 } 665 666 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 667 { 668 return -EOPNOTSUPP; 669 } 670 671 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 672 { 673 return -EOPNOTSUPP; 674 } 675 676 static inline void nbp_vlan_flush(struct net_bridge_port *port) 677 { 678 } 679 680 static inline struct net_port_vlans *br_get_vlan_info( 681 const struct net_bridge *br) 682 { 683 return NULL; 684 } 685 static inline struct net_port_vlans *nbp_get_vlan_info( 686 const struct net_bridge_port *p) 687 { 688 return NULL; 689 } 690 691 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 692 { 693 return false; 694 } 695 696 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 697 { 698 return 0; 699 } 700 static inline u16 br_get_pvid(const struct net_port_vlans *v) 701 { 702 return VLAN_N_VID; /* Returns invalid vid */ 703 } 704 #endif 705 706 /* br_netfilter.c */ 707 #ifdef CONFIG_BRIDGE_NETFILTER 708 extern int br_netfilter_init(void); 709 extern void br_netfilter_fini(void); 710 extern void br_netfilter_rtable_init(struct net_bridge *); 711 #else 712 #define br_netfilter_init() (0) 713 #define br_netfilter_fini() do { } while(0) 714 #define br_netfilter_rtable_init(x) 715 #endif 716 717 /* br_stp.c */ 718 extern void br_log_state(const struct net_bridge_port *p); 719 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 720 u16 port_no); 721 extern void br_init_port(struct net_bridge_port *p); 722 extern void br_become_designated_port(struct net_bridge_port *p); 723 724 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 725 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 726 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 727 728 729 /* br_stp_if.c */ 730 extern void br_stp_enable_bridge(struct net_bridge *br); 731 extern void br_stp_disable_bridge(struct net_bridge *br); 732 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 733 extern void br_stp_enable_port(struct net_bridge_port *p); 734 extern void br_stp_disable_port(struct net_bridge_port *p); 735 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 736 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 737 extern void br_stp_set_bridge_priority(struct net_bridge *br, 738 u16 newprio); 739 extern int br_stp_set_port_priority(struct net_bridge_port *p, 740 unsigned long newprio); 741 extern int br_stp_set_path_cost(struct net_bridge_port *p, 742 unsigned long path_cost); 743 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 744 745 /* br_stp_bpdu.c */ 746 struct stp_proto; 747 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 748 struct net_device *dev); 749 750 /* br_stp_timer.c */ 751 extern void br_stp_timer_init(struct net_bridge *br); 752 extern void br_stp_port_timer_init(struct net_bridge_port *p); 753 extern unsigned long br_timer_value(const struct timer_list *timer); 754 755 /* br.c */ 756 #if IS_ENABLED(CONFIG_ATM_LANE) 757 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 758 #endif 759 760 /* br_netlink.c */ 761 extern struct rtnl_link_ops br_link_ops; 762 extern int br_netlink_init(void); 763 extern void br_netlink_fini(void); 764 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 765 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 766 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 767 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 768 struct net_device *dev, u32 filter_mask); 769 770 #ifdef CONFIG_SYSFS 771 /* br_sysfs_if.c */ 772 extern const struct sysfs_ops brport_sysfs_ops; 773 extern int br_sysfs_addif(struct net_bridge_port *p); 774 extern int br_sysfs_renameif(struct net_bridge_port *p); 775 776 /* br_sysfs_br.c */ 777 extern int br_sysfs_addbr(struct net_device *dev); 778 extern void br_sysfs_delbr(struct net_device *dev); 779 780 #else 781 782 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 783 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 784 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 785 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 786 #endif /* CONFIG_SYSFS */ 787 788 #endif 789