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