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 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 70 /* our own querier */ 71 struct bridge_mcast_query { 72 struct timer_list timer; 73 u32 startup_sent; 74 }; 75 76 /* other querier */ 77 struct bridge_mcast_querier { 78 struct timer_list timer; 79 unsigned long delay_time; 80 }; 81 #endif 82 83 struct net_port_vlans { 84 u16 port_idx; 85 u16 pvid; 86 union { 87 struct net_bridge_port *port; 88 struct net_bridge *br; 89 } parent; 90 struct rcu_head rcu; 91 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 92 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 93 u16 num_vlans; 94 }; 95 96 struct net_bridge_fdb_entry 97 { 98 struct hlist_node hlist; 99 struct net_bridge_port *dst; 100 101 struct rcu_head rcu; 102 unsigned long updated; 103 unsigned long used; 104 mac_addr addr; 105 unsigned char is_local; 106 unsigned char is_static; 107 __u16 vlan_id; 108 }; 109 110 struct net_bridge_port_group { 111 struct net_bridge_port *port; 112 struct net_bridge_port_group __rcu *next; 113 struct hlist_node mglist; 114 struct rcu_head rcu; 115 struct timer_list timer; 116 struct br_ip addr; 117 unsigned char state; 118 }; 119 120 struct net_bridge_mdb_entry 121 { 122 struct hlist_node hlist[2]; 123 struct net_bridge *br; 124 struct net_bridge_port_group __rcu *ports; 125 struct rcu_head rcu; 126 struct timer_list timer; 127 struct br_ip addr; 128 bool mglist; 129 bool timer_armed; 130 }; 131 132 struct net_bridge_mdb_htable 133 { 134 struct hlist_head *mhash; 135 struct rcu_head rcu; 136 struct net_bridge_mdb_htable *old; 137 u32 size; 138 u32 max; 139 u32 secret; 140 u32 ver; 141 }; 142 143 struct net_bridge_port 144 { 145 struct net_bridge *br; 146 struct net_device *dev; 147 struct list_head list; 148 149 /* STP */ 150 u8 priority; 151 u8 state; 152 u16 port_no; 153 unsigned char topology_change_ack; 154 unsigned char config_pending; 155 port_id port_id; 156 port_id designated_port; 157 bridge_id designated_root; 158 bridge_id designated_bridge; 159 u32 path_cost; 160 u32 designated_cost; 161 unsigned long designated_age; 162 163 struct timer_list forward_delay_timer; 164 struct timer_list hold_timer; 165 struct timer_list message_age_timer; 166 struct kobject kobj; 167 struct rcu_head rcu; 168 169 unsigned long flags; 170 #define BR_HAIRPIN_MODE 0x00000001 171 #define BR_BPDU_GUARD 0x00000002 172 #define BR_ROOT_BLOCK 0x00000004 173 #define BR_MULTICAST_FAST_LEAVE 0x00000008 174 #define BR_ADMIN_COST 0x00000010 175 #define BR_LEARNING 0x00000020 176 #define BR_FLOOD 0x00000040 177 178 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 179 struct bridge_mcast_query ip4_query; 180 #if IS_ENABLED(CONFIG_IPV6) 181 struct bridge_mcast_query ip6_query; 182 #endif /* IS_ENABLED(CONFIG_IPV6) */ 183 unsigned char multicast_router; 184 struct timer_list multicast_router_timer; 185 struct hlist_head mglist; 186 struct hlist_node rlist; 187 #endif 188 189 #ifdef CONFIG_SYSFS 190 char sysfs_name[IFNAMSIZ]; 191 #endif 192 193 #ifdef CONFIG_NET_POLL_CONTROLLER 194 struct netpoll *np; 195 #endif 196 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 197 struct net_port_vlans __rcu *vlan_info; 198 #endif 199 }; 200 201 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 202 203 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 204 { 205 return rcu_dereference(dev->rx_handler_data); 206 } 207 208 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 209 { 210 return br_port_exists(dev) ? 211 rtnl_dereference(dev->rx_handler_data) : NULL; 212 } 213 214 struct br_cpu_netstats { 215 u64 rx_packets; 216 u64 rx_bytes; 217 u64 tx_packets; 218 u64 tx_bytes; 219 struct u64_stats_sync syncp; 220 }; 221 222 struct net_bridge 223 { 224 spinlock_t lock; 225 struct list_head port_list; 226 struct net_device *dev; 227 228 struct br_cpu_netstats __percpu *stats; 229 spinlock_t hash_lock; 230 struct hlist_head hash[BR_HASH_SIZE]; 231 #ifdef CONFIG_BRIDGE_NETFILTER 232 struct rtable fake_rtable; 233 bool nf_call_iptables; 234 bool nf_call_ip6tables; 235 bool nf_call_arptables; 236 #endif 237 u16 group_fwd_mask; 238 239 /* STP */ 240 bridge_id designated_root; 241 bridge_id bridge_id; 242 u32 root_path_cost; 243 unsigned long max_age; 244 unsigned long hello_time; 245 unsigned long forward_delay; 246 unsigned long bridge_max_age; 247 unsigned long ageing_time; 248 unsigned long bridge_hello_time; 249 unsigned long bridge_forward_delay; 250 251 u8 group_addr[ETH_ALEN]; 252 u16 root_port; 253 254 enum { 255 BR_NO_STP, /* no spanning tree */ 256 BR_KERNEL_STP, /* old STP in kernel */ 257 BR_USER_STP, /* new RSTP in userspace */ 258 } stp_enabled; 259 260 unsigned char topology_change; 261 unsigned char topology_change_detected; 262 263 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 264 unsigned char multicast_router; 265 266 u8 multicast_disabled:1; 267 u8 multicast_querier:1; 268 u8 multicast_query_use_ifaddr:1; 269 270 u32 hash_elasticity; 271 u32 hash_max; 272 273 u32 multicast_last_member_count; 274 u32 multicast_startup_query_count; 275 276 unsigned long multicast_last_member_interval; 277 unsigned long multicast_membership_interval; 278 unsigned long multicast_querier_interval; 279 unsigned long multicast_query_interval; 280 unsigned long multicast_query_response_interval; 281 unsigned long multicast_startup_query_interval; 282 283 spinlock_t multicast_lock; 284 struct net_bridge_mdb_htable __rcu *mdb; 285 struct hlist_head router_list; 286 287 struct timer_list multicast_router_timer; 288 struct bridge_mcast_querier ip4_querier; 289 struct bridge_mcast_query ip4_query; 290 #if IS_ENABLED(CONFIG_IPV6) 291 struct bridge_mcast_querier ip6_querier; 292 struct bridge_mcast_query ip6_query; 293 #endif /* IS_ENABLED(CONFIG_IPV6) */ 294 #endif 295 296 struct timer_list hello_timer; 297 struct timer_list tcn_timer; 298 struct timer_list topology_change_timer; 299 struct timer_list gc_timer; 300 struct kobject *ifobj; 301 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 302 u8 vlan_enabled; 303 struct net_port_vlans __rcu *vlan_info; 304 #endif 305 }; 306 307 struct br_input_skb_cb { 308 struct net_device *brdev; 309 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 310 int igmp; 311 int mrouters_only; 312 #endif 313 }; 314 315 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 316 317 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 318 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 319 #else 320 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 321 #endif 322 323 #define br_printk(level, br, format, args...) \ 324 printk(level "%s: " format, (br)->dev->name, ##args) 325 326 #define br_err(__br, format, args...) \ 327 br_printk(KERN_ERR, __br, format, ##args) 328 #define br_warn(__br, format, args...) \ 329 br_printk(KERN_WARNING, __br, format, ##args) 330 #define br_notice(__br, format, args...) \ 331 br_printk(KERN_NOTICE, __br, format, ##args) 332 #define br_info(__br, format, args...) \ 333 br_printk(KERN_INFO, __br, format, ##args) 334 335 #define br_debug(br, format, args...) \ 336 pr_debug("%s: " format, (br)->dev->name, ##args) 337 338 extern struct notifier_block br_device_notifier; 339 340 /* called under bridge lock */ 341 static inline int br_is_root_bridge(const struct net_bridge *br) 342 { 343 return !memcmp(&br->bridge_id, &br->designated_root, 8); 344 } 345 346 /* br_device.c */ 347 extern void br_dev_setup(struct net_device *dev); 348 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 349 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 350 struct net_device *dev); 351 #ifdef CONFIG_NET_POLL_CONTROLLER 352 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 353 struct sk_buff *skb) 354 { 355 struct netpoll *np = p->np; 356 357 if (np) 358 netpoll_send_skb(np, skb); 359 } 360 361 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 362 extern void br_netpoll_disable(struct net_bridge_port *p); 363 #else 364 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 365 struct sk_buff *skb) 366 { 367 } 368 369 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 370 { 371 return 0; 372 } 373 374 static inline void br_netpoll_disable(struct net_bridge_port *p) 375 { 376 } 377 #endif 378 379 /* br_fdb.c */ 380 extern int br_fdb_init(void); 381 extern void br_fdb_fini(void); 382 extern void br_fdb_flush(struct net_bridge *br); 383 extern void br_fdb_changeaddr(struct net_bridge_port *p, 384 const unsigned char *newaddr); 385 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 386 extern void br_fdb_cleanup(unsigned long arg); 387 extern void br_fdb_delete_by_port(struct net_bridge *br, 388 const struct net_bridge_port *p, int do_all); 389 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 390 const unsigned char *addr, 391 __u16 vid); 392 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 393 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 394 unsigned long count, unsigned long off); 395 extern int br_fdb_insert(struct net_bridge *br, 396 struct net_bridge_port *source, 397 const unsigned char *addr, 398 u16 vid); 399 extern void br_fdb_update(struct net_bridge *br, 400 struct net_bridge_port *source, 401 const unsigned char *addr, 402 u16 vid); 403 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 404 405 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 406 struct net_device *dev, 407 const unsigned char *addr); 408 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 409 struct net_device *dev, 410 const unsigned char *addr, 411 u16 nlh_flags); 412 extern int br_fdb_dump(struct sk_buff *skb, 413 struct netlink_callback *cb, 414 struct net_device *dev, 415 int idx); 416 417 /* br_forward.c */ 418 extern void br_deliver(const struct net_bridge_port *to, 419 struct sk_buff *skb); 420 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 421 extern void br_forward(const struct net_bridge_port *to, 422 struct sk_buff *skb, struct sk_buff *skb0); 423 extern int br_forward_finish(struct sk_buff *skb); 424 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 425 bool unicast); 426 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 427 struct sk_buff *skb2, bool unicast); 428 429 /* br_if.c */ 430 extern void br_port_carrier_check(struct net_bridge_port *p); 431 extern int br_add_bridge(struct net *net, const char *name); 432 extern int br_del_bridge(struct net *net, const char *name); 433 extern void br_net_exit(struct net *net); 434 extern int br_add_if(struct net_bridge *br, 435 struct net_device *dev); 436 extern int br_del_if(struct net_bridge *br, 437 struct net_device *dev); 438 extern int br_min_mtu(const struct net_bridge *br); 439 extern netdev_features_t br_features_recompute(struct net_bridge *br, 440 netdev_features_t features); 441 442 /* br_input.c */ 443 extern int br_handle_frame_finish(struct sk_buff *skb); 444 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 445 446 /* br_ioctl.c */ 447 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 448 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 449 450 /* br_multicast.c */ 451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 452 extern unsigned int br_mdb_rehash_seq; 453 extern int br_multicast_rcv(struct net_bridge *br, 454 struct net_bridge_port *port, 455 struct sk_buff *skb); 456 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 457 struct sk_buff *skb, u16 vid); 458 extern void br_multicast_add_port(struct net_bridge_port *port); 459 extern void br_multicast_del_port(struct net_bridge_port *port); 460 extern void br_multicast_enable_port(struct net_bridge_port *port); 461 extern void br_multicast_disable_port(struct net_bridge_port *port); 462 extern void br_multicast_init(struct net_bridge *br); 463 extern void br_multicast_open(struct net_bridge *br); 464 extern void br_multicast_stop(struct net_bridge *br); 465 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 466 struct sk_buff *skb); 467 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 468 struct sk_buff *skb, struct sk_buff *skb2); 469 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 470 extern int br_multicast_set_port_router(struct net_bridge_port *p, 471 unsigned long val); 472 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 473 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 474 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 475 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 476 struct net_bridge_mdb_htable *mdb, 477 struct br_ip *dst); 478 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 479 struct net_bridge_port *port, struct br_ip *group); 480 extern void br_multicast_free_pg(struct rcu_head *head); 481 extern struct net_bridge_port_group *br_multicast_new_port_group( 482 struct net_bridge_port *port, 483 struct br_ip *group, 484 struct net_bridge_port_group __rcu *next, 485 unsigned char state); 486 extern void br_mdb_init(void); 487 extern void br_mdb_uninit(void); 488 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 489 struct br_ip *group, int type); 490 491 #define mlock_dereference(X, br) \ 492 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 493 494 static inline bool br_multicast_is_router(struct net_bridge *br) 495 { 496 return br->multicast_router == 2 || 497 (br->multicast_router == 1 && 498 timer_pending(&br->multicast_router_timer)); 499 } 500 501 static inline bool 502 __br_multicast_querier_exists(struct net_bridge *br, 503 struct bridge_mcast_querier *querier) 504 { 505 return time_is_before_jiffies(querier->delay_time) && 506 (br->multicast_querier || timer_pending(&querier->timer)); 507 } 508 509 static inline bool br_multicast_querier_exists(struct net_bridge *br, 510 struct ethhdr *eth) 511 { 512 switch (eth->h_proto) { 513 case (htons(ETH_P_IP)): 514 return __br_multicast_querier_exists(br, &br->ip4_querier); 515 #if IS_ENABLED(CONFIG_IPV6) 516 case (htons(ETH_P_IPV6)): 517 return __br_multicast_querier_exists(br, &br->ip6_querier); 518 #endif 519 default: 520 return false; 521 } 522 } 523 #else 524 static inline int br_multicast_rcv(struct net_bridge *br, 525 struct net_bridge_port *port, 526 struct sk_buff *skb) 527 { 528 return 0; 529 } 530 531 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 532 struct sk_buff *skb, u16 vid) 533 { 534 return NULL; 535 } 536 537 static inline void br_multicast_add_port(struct net_bridge_port *port) 538 { 539 } 540 541 static inline void br_multicast_del_port(struct net_bridge_port *port) 542 { 543 } 544 545 static inline void br_multicast_enable_port(struct net_bridge_port *port) 546 { 547 } 548 549 static inline void br_multicast_disable_port(struct net_bridge_port *port) 550 { 551 } 552 553 static inline void br_multicast_init(struct net_bridge *br) 554 { 555 } 556 557 static inline void br_multicast_open(struct net_bridge *br) 558 { 559 } 560 561 static inline void br_multicast_stop(struct net_bridge *br) 562 { 563 } 564 565 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 566 struct sk_buff *skb) 567 { 568 } 569 570 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 571 struct sk_buff *skb, 572 struct sk_buff *skb2) 573 { 574 } 575 static inline bool br_multicast_is_router(struct net_bridge *br) 576 { 577 return 0; 578 } 579 static inline bool br_multicast_querier_exists(struct net_bridge *br, 580 struct ethhdr *eth) 581 { 582 return false; 583 } 584 static inline void br_mdb_init(void) 585 { 586 } 587 static inline void br_mdb_uninit(void) 588 { 589 } 590 #endif 591 592 /* br_vlan.c */ 593 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 594 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 595 struct sk_buff *skb, u16 *vid); 596 extern bool br_allowed_egress(struct net_bridge *br, 597 const struct net_port_vlans *v, 598 const struct sk_buff *skb); 599 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 600 const struct net_port_vlans *v, 601 struct sk_buff *skb); 602 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 603 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 604 extern void br_vlan_flush(struct net_bridge *br); 605 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 606 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 607 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 608 extern void nbp_vlan_flush(struct net_bridge_port *port); 609 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 610 611 static inline struct net_port_vlans *br_get_vlan_info( 612 const struct net_bridge *br) 613 { 614 return rcu_dereference_rtnl(br->vlan_info); 615 } 616 617 static inline struct net_port_vlans *nbp_get_vlan_info( 618 const struct net_bridge_port *p) 619 { 620 return rcu_dereference_rtnl(p->vlan_info); 621 } 622 623 /* Since bridge now depends on 8021Q module, but the time bridge sees the 624 * skb, the vlan tag will always be present if the frame was tagged. 625 */ 626 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 627 { 628 int err = 0; 629 630 if (vlan_tx_tag_present(skb)) 631 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 632 else { 633 *vid = 0; 634 err = -EINVAL; 635 } 636 637 return err; 638 } 639 640 static inline u16 br_get_pvid(const struct net_port_vlans *v) 641 { 642 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 643 * vid wasn't set 644 */ 645 smp_rmb(); 646 return (v->pvid & VLAN_TAG_PRESENT) ? 647 (v->pvid & ~VLAN_TAG_PRESENT) : 648 VLAN_N_VID; 649 } 650 651 #else 652 static inline bool br_allowed_ingress(struct net_bridge *br, 653 struct net_port_vlans *v, 654 struct sk_buff *skb, 655 u16 *vid) 656 { 657 return true; 658 } 659 660 static inline bool br_allowed_egress(struct net_bridge *br, 661 const struct net_port_vlans *v, 662 const struct sk_buff *skb) 663 { 664 return true; 665 } 666 667 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 668 const struct net_port_vlans *v, 669 struct sk_buff *skb) 670 { 671 return skb; 672 } 673 674 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 675 { 676 return -EOPNOTSUPP; 677 } 678 679 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 680 { 681 return -EOPNOTSUPP; 682 } 683 684 static inline void br_vlan_flush(struct net_bridge *br) 685 { 686 } 687 688 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 689 { 690 return -EOPNOTSUPP; 691 } 692 693 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 694 { 695 return -EOPNOTSUPP; 696 } 697 698 static inline void nbp_vlan_flush(struct net_bridge_port *port) 699 { 700 } 701 702 static inline struct net_port_vlans *br_get_vlan_info( 703 const struct net_bridge *br) 704 { 705 return NULL; 706 } 707 static inline struct net_port_vlans *nbp_get_vlan_info( 708 const struct net_bridge_port *p) 709 { 710 return NULL; 711 } 712 713 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 714 { 715 return false; 716 } 717 718 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 719 { 720 return 0; 721 } 722 static inline u16 br_get_pvid(const struct net_port_vlans *v) 723 { 724 return VLAN_N_VID; /* Returns invalid vid */ 725 } 726 #endif 727 728 /* br_netfilter.c */ 729 #ifdef CONFIG_BRIDGE_NETFILTER 730 extern int br_netfilter_init(void); 731 extern void br_netfilter_fini(void); 732 extern void br_netfilter_rtable_init(struct net_bridge *); 733 #else 734 #define br_netfilter_init() (0) 735 #define br_netfilter_fini() do { } while(0) 736 #define br_netfilter_rtable_init(x) 737 #endif 738 739 /* br_stp.c */ 740 extern void br_log_state(const struct net_bridge_port *p); 741 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 742 u16 port_no); 743 extern void br_init_port(struct net_bridge_port *p); 744 extern void br_become_designated_port(struct net_bridge_port *p); 745 746 extern void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 747 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 748 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 749 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 750 751 752 /* br_stp_if.c */ 753 extern void br_stp_enable_bridge(struct net_bridge *br); 754 extern void br_stp_disable_bridge(struct net_bridge *br); 755 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 756 extern void br_stp_enable_port(struct net_bridge_port *p); 757 extern void br_stp_disable_port(struct net_bridge_port *p); 758 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 759 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 760 extern void br_stp_set_bridge_priority(struct net_bridge *br, 761 u16 newprio); 762 extern int br_stp_set_port_priority(struct net_bridge_port *p, 763 unsigned long newprio); 764 extern int br_stp_set_path_cost(struct net_bridge_port *p, 765 unsigned long path_cost); 766 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 767 768 /* br_stp_bpdu.c */ 769 struct stp_proto; 770 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 771 struct net_device *dev); 772 773 /* br_stp_timer.c */ 774 extern void br_stp_timer_init(struct net_bridge *br); 775 extern void br_stp_port_timer_init(struct net_bridge_port *p); 776 extern unsigned long br_timer_value(const struct timer_list *timer); 777 778 /* br.c */ 779 #if IS_ENABLED(CONFIG_ATM_LANE) 780 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 781 #endif 782 783 /* br_netlink.c */ 784 extern struct rtnl_link_ops br_link_ops; 785 extern int br_netlink_init(void); 786 extern void br_netlink_fini(void); 787 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 788 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 789 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 790 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 791 struct net_device *dev, u32 filter_mask); 792 793 #ifdef CONFIG_SYSFS 794 /* br_sysfs_if.c */ 795 extern const struct sysfs_ops brport_sysfs_ops; 796 extern int br_sysfs_addif(struct net_bridge_port *p); 797 extern int br_sysfs_renameif(struct net_bridge_port *p); 798 799 /* br_sysfs_br.c */ 800 extern int br_sysfs_addbr(struct net_device *dev); 801 extern void br_sysfs_delbr(struct net_device *dev); 802 803 #else 804 805 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 806 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 807 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 808 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 809 #endif /* CONFIG_SYSFS */ 810 811 #endif 812