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 struct net_bridge_port *port = 206 rcu_dereference_rtnl(dev->rx_handler_data); 207 208 return br_port_exists(dev) ? port : NULL; 209 } 210 211 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 212 { 213 return br_port_exists(dev) ? 214 rtnl_dereference(dev->rx_handler_data) : NULL; 215 } 216 217 struct br_cpu_netstats { 218 u64 rx_packets; 219 u64 rx_bytes; 220 u64 tx_packets; 221 u64 tx_bytes; 222 struct u64_stats_sync syncp; 223 }; 224 225 struct net_bridge 226 { 227 spinlock_t lock; 228 struct list_head port_list; 229 struct net_device *dev; 230 231 struct br_cpu_netstats __percpu *stats; 232 spinlock_t hash_lock; 233 struct hlist_head hash[BR_HASH_SIZE]; 234 #ifdef CONFIG_BRIDGE_NETFILTER 235 struct rtable fake_rtable; 236 bool nf_call_iptables; 237 bool nf_call_ip6tables; 238 bool nf_call_arptables; 239 #endif 240 u16 group_fwd_mask; 241 242 /* STP */ 243 bridge_id designated_root; 244 bridge_id bridge_id; 245 u32 root_path_cost; 246 unsigned long max_age; 247 unsigned long hello_time; 248 unsigned long forward_delay; 249 unsigned long bridge_max_age; 250 unsigned long ageing_time; 251 unsigned long bridge_hello_time; 252 unsigned long bridge_forward_delay; 253 254 u8 group_addr[ETH_ALEN]; 255 u16 root_port; 256 257 enum { 258 BR_NO_STP, /* no spanning tree */ 259 BR_KERNEL_STP, /* old STP in kernel */ 260 BR_USER_STP, /* new RSTP in userspace */ 261 } stp_enabled; 262 263 unsigned char topology_change; 264 unsigned char topology_change_detected; 265 266 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 267 unsigned char multicast_router; 268 269 u8 multicast_disabled:1; 270 u8 multicast_querier:1; 271 u8 multicast_query_use_ifaddr:1; 272 273 u32 hash_elasticity; 274 u32 hash_max; 275 276 u32 multicast_last_member_count; 277 u32 multicast_startup_query_count; 278 279 unsigned long multicast_last_member_interval; 280 unsigned long multicast_membership_interval; 281 unsigned long multicast_querier_interval; 282 unsigned long multicast_query_interval; 283 unsigned long multicast_query_response_interval; 284 unsigned long multicast_startup_query_interval; 285 286 spinlock_t multicast_lock; 287 struct net_bridge_mdb_htable __rcu *mdb; 288 struct hlist_head router_list; 289 290 struct timer_list multicast_router_timer; 291 struct bridge_mcast_querier ip4_querier; 292 struct bridge_mcast_query ip4_query; 293 #if IS_ENABLED(CONFIG_IPV6) 294 struct bridge_mcast_querier ip6_querier; 295 struct bridge_mcast_query ip6_query; 296 #endif /* IS_ENABLED(CONFIG_IPV6) */ 297 #endif 298 299 struct timer_list hello_timer; 300 struct timer_list tcn_timer; 301 struct timer_list topology_change_timer; 302 struct timer_list gc_timer; 303 struct kobject *ifobj; 304 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 305 u8 vlan_enabled; 306 struct net_port_vlans __rcu *vlan_info; 307 #endif 308 }; 309 310 struct br_input_skb_cb { 311 struct net_device *brdev; 312 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 313 int igmp; 314 int mrouters_only; 315 #endif 316 }; 317 318 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 319 320 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 321 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 322 #else 323 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 324 #endif 325 326 #define br_printk(level, br, format, args...) \ 327 printk(level "%s: " format, (br)->dev->name, ##args) 328 329 #define br_err(__br, format, args...) \ 330 br_printk(KERN_ERR, __br, format, ##args) 331 #define br_warn(__br, format, args...) \ 332 br_printk(KERN_WARNING, __br, format, ##args) 333 #define br_notice(__br, format, args...) \ 334 br_printk(KERN_NOTICE, __br, format, ##args) 335 #define br_info(__br, format, args...) \ 336 br_printk(KERN_INFO, __br, format, ##args) 337 338 #define br_debug(br, format, args...) \ 339 pr_debug("%s: " format, (br)->dev->name, ##args) 340 341 extern struct notifier_block br_device_notifier; 342 343 /* called under bridge lock */ 344 static inline int br_is_root_bridge(const struct net_bridge *br) 345 { 346 return !memcmp(&br->bridge_id, &br->designated_root, 8); 347 } 348 349 /* br_device.c */ 350 extern void br_dev_setup(struct net_device *dev); 351 extern void br_dev_delete(struct net_device *dev, struct list_head *list); 352 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 353 struct net_device *dev); 354 #ifdef CONFIG_NET_POLL_CONTROLLER 355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 356 struct sk_buff *skb) 357 { 358 struct netpoll *np = p->np; 359 360 if (np) 361 netpoll_send_skb(np, skb); 362 } 363 364 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 365 extern void br_netpoll_disable(struct net_bridge_port *p); 366 #else 367 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 368 struct sk_buff *skb) 369 { 370 } 371 372 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 373 { 374 return 0; 375 } 376 377 static inline void br_netpoll_disable(struct net_bridge_port *p) 378 { 379 } 380 #endif 381 382 /* br_fdb.c */ 383 extern int br_fdb_init(void); 384 extern void br_fdb_fini(void); 385 extern void br_fdb_flush(struct net_bridge *br); 386 extern void br_fdb_changeaddr(struct net_bridge_port *p, 387 const unsigned char *newaddr); 388 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 389 extern void br_fdb_cleanup(unsigned long arg); 390 extern void br_fdb_delete_by_port(struct net_bridge *br, 391 const struct net_bridge_port *p, int do_all); 392 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 393 const unsigned char *addr, 394 __u16 vid); 395 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 396 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 397 unsigned long count, unsigned long off); 398 extern int br_fdb_insert(struct net_bridge *br, 399 struct net_bridge_port *source, 400 const unsigned char *addr, 401 u16 vid); 402 extern void br_fdb_update(struct net_bridge *br, 403 struct net_bridge_port *source, 404 const unsigned char *addr, 405 u16 vid); 406 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 407 408 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 409 struct net_device *dev, 410 const unsigned char *addr); 411 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], 412 struct net_device *dev, 413 const unsigned char *addr, 414 u16 nlh_flags); 415 extern int br_fdb_dump(struct sk_buff *skb, 416 struct netlink_callback *cb, 417 struct net_device *dev, 418 int idx); 419 420 /* br_forward.c */ 421 extern void br_deliver(const struct net_bridge_port *to, 422 struct sk_buff *skb); 423 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 424 extern void br_forward(const struct net_bridge_port *to, 425 struct sk_buff *skb, struct sk_buff *skb0); 426 extern int br_forward_finish(struct sk_buff *skb); 427 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, 428 bool unicast); 429 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 430 struct sk_buff *skb2, bool unicast); 431 432 /* br_if.c */ 433 extern void br_port_carrier_check(struct net_bridge_port *p); 434 extern int br_add_bridge(struct net *net, const char *name); 435 extern int br_del_bridge(struct net *net, const char *name); 436 extern void br_net_exit(struct net *net); 437 extern int br_add_if(struct net_bridge *br, 438 struct net_device *dev); 439 extern int br_del_if(struct net_bridge *br, 440 struct net_device *dev); 441 extern int br_min_mtu(const struct net_bridge *br); 442 extern netdev_features_t br_features_recompute(struct net_bridge *br, 443 netdev_features_t features); 444 445 /* br_input.c */ 446 extern int br_handle_frame_finish(struct sk_buff *skb); 447 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 448 449 /* br_ioctl.c */ 450 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 451 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 452 453 /* br_multicast.c */ 454 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 455 extern unsigned int br_mdb_rehash_seq; 456 extern int br_multicast_rcv(struct net_bridge *br, 457 struct net_bridge_port *port, 458 struct sk_buff *skb); 459 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 460 struct sk_buff *skb, u16 vid); 461 extern void br_multicast_add_port(struct net_bridge_port *port); 462 extern void br_multicast_del_port(struct net_bridge_port *port); 463 extern void br_multicast_enable_port(struct net_bridge_port *port); 464 extern void br_multicast_disable_port(struct net_bridge_port *port); 465 extern void br_multicast_init(struct net_bridge *br); 466 extern void br_multicast_open(struct net_bridge *br); 467 extern void br_multicast_stop(struct net_bridge *br); 468 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 469 struct sk_buff *skb); 470 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 471 struct sk_buff *skb, struct sk_buff *skb2); 472 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val); 473 extern int br_multicast_set_port_router(struct net_bridge_port *p, 474 unsigned long val); 475 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val); 476 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 477 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 478 extern struct net_bridge_mdb_entry *br_mdb_ip_get( 479 struct net_bridge_mdb_htable *mdb, 480 struct br_ip *dst); 481 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, 482 struct net_bridge_port *port, struct br_ip *group); 483 extern void br_multicast_free_pg(struct rcu_head *head); 484 extern struct net_bridge_port_group *br_multicast_new_port_group( 485 struct net_bridge_port *port, 486 struct br_ip *group, 487 struct net_bridge_port_group __rcu *next, 488 unsigned char state); 489 extern void br_mdb_init(void); 490 extern void br_mdb_uninit(void); 491 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 492 struct br_ip *group, int type); 493 494 #define mlock_dereference(X, br) \ 495 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 496 497 static inline bool br_multicast_is_router(struct net_bridge *br) 498 { 499 return br->multicast_router == 2 || 500 (br->multicast_router == 1 && 501 timer_pending(&br->multicast_router_timer)); 502 } 503 504 static inline bool 505 __br_multicast_querier_exists(struct net_bridge *br, 506 struct bridge_mcast_querier *querier) 507 { 508 return time_is_before_jiffies(querier->delay_time) && 509 (br->multicast_querier || timer_pending(&querier->timer)); 510 } 511 512 static inline bool br_multicast_querier_exists(struct net_bridge *br, 513 struct ethhdr *eth) 514 { 515 switch (eth->h_proto) { 516 case (htons(ETH_P_IP)): 517 return __br_multicast_querier_exists(br, &br->ip4_querier); 518 #if IS_ENABLED(CONFIG_IPV6) 519 case (htons(ETH_P_IPV6)): 520 return __br_multicast_querier_exists(br, &br->ip6_querier); 521 #endif 522 default: 523 return false; 524 } 525 } 526 #else 527 static inline int br_multicast_rcv(struct net_bridge *br, 528 struct net_bridge_port *port, 529 struct sk_buff *skb) 530 { 531 return 0; 532 } 533 534 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 535 struct sk_buff *skb, u16 vid) 536 { 537 return NULL; 538 } 539 540 static inline void br_multicast_add_port(struct net_bridge_port *port) 541 { 542 } 543 544 static inline void br_multicast_del_port(struct net_bridge_port *port) 545 { 546 } 547 548 static inline void br_multicast_enable_port(struct net_bridge_port *port) 549 { 550 } 551 552 static inline void br_multicast_disable_port(struct net_bridge_port *port) 553 { 554 } 555 556 static inline void br_multicast_init(struct net_bridge *br) 557 { 558 } 559 560 static inline void br_multicast_open(struct net_bridge *br) 561 { 562 } 563 564 static inline void br_multicast_stop(struct net_bridge *br) 565 { 566 } 567 568 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 569 struct sk_buff *skb) 570 { 571 } 572 573 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 574 struct sk_buff *skb, 575 struct sk_buff *skb2) 576 { 577 } 578 static inline bool br_multicast_is_router(struct net_bridge *br) 579 { 580 return 0; 581 } 582 static inline bool br_multicast_querier_exists(struct net_bridge *br, 583 struct ethhdr *eth) 584 { 585 return false; 586 } 587 static inline void br_mdb_init(void) 588 { 589 } 590 static inline void br_mdb_uninit(void) 591 { 592 } 593 #endif 594 595 /* br_vlan.c */ 596 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 597 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 598 struct sk_buff *skb, u16 *vid); 599 extern bool br_allowed_egress(struct net_bridge *br, 600 const struct net_port_vlans *v, 601 const struct sk_buff *skb); 602 extern struct sk_buff *br_handle_vlan(struct net_bridge *br, 603 const struct net_port_vlans *v, 604 struct sk_buff *skb); 605 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 606 extern int br_vlan_delete(struct net_bridge *br, u16 vid); 607 extern void br_vlan_flush(struct net_bridge *br); 608 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 609 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 610 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 611 extern void nbp_vlan_flush(struct net_bridge_port *port); 612 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 613 614 static inline struct net_port_vlans *br_get_vlan_info( 615 const struct net_bridge *br) 616 { 617 return rcu_dereference_rtnl(br->vlan_info); 618 } 619 620 static inline struct net_port_vlans *nbp_get_vlan_info( 621 const struct net_bridge_port *p) 622 { 623 return rcu_dereference_rtnl(p->vlan_info); 624 } 625 626 /* Since bridge now depends on 8021Q module, but the time bridge sees the 627 * skb, the vlan tag will always be present if the frame was tagged. 628 */ 629 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 630 { 631 int err = 0; 632 633 if (vlan_tx_tag_present(skb)) 634 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 635 else { 636 *vid = 0; 637 err = -EINVAL; 638 } 639 640 return err; 641 } 642 643 static inline u16 br_get_pvid(const struct net_port_vlans *v) 644 { 645 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 646 * vid wasn't set 647 */ 648 smp_rmb(); 649 return (v->pvid & VLAN_TAG_PRESENT) ? 650 (v->pvid & ~VLAN_TAG_PRESENT) : 651 VLAN_N_VID; 652 } 653 654 #else 655 static inline bool br_allowed_ingress(struct net_bridge *br, 656 struct net_port_vlans *v, 657 struct sk_buff *skb, 658 u16 *vid) 659 { 660 return true; 661 } 662 663 static inline bool br_allowed_egress(struct net_bridge *br, 664 const struct net_port_vlans *v, 665 const struct sk_buff *skb) 666 { 667 return true; 668 } 669 670 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 671 const struct net_port_vlans *v, 672 struct sk_buff *skb) 673 { 674 return skb; 675 } 676 677 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 678 { 679 return -EOPNOTSUPP; 680 } 681 682 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 683 { 684 return -EOPNOTSUPP; 685 } 686 687 static inline void br_vlan_flush(struct net_bridge *br) 688 { 689 } 690 691 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 692 { 693 return -EOPNOTSUPP; 694 } 695 696 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 697 { 698 return -EOPNOTSUPP; 699 } 700 701 static inline void nbp_vlan_flush(struct net_bridge_port *port) 702 { 703 } 704 705 static inline struct net_port_vlans *br_get_vlan_info( 706 const struct net_bridge *br) 707 { 708 return NULL; 709 } 710 static inline struct net_port_vlans *nbp_get_vlan_info( 711 const struct net_bridge_port *p) 712 { 713 return NULL; 714 } 715 716 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 717 { 718 return false; 719 } 720 721 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 722 { 723 return 0; 724 } 725 static inline u16 br_get_pvid(const struct net_port_vlans *v) 726 { 727 return VLAN_N_VID; /* Returns invalid vid */ 728 } 729 #endif 730 731 /* br_netfilter.c */ 732 #ifdef CONFIG_BRIDGE_NETFILTER 733 extern int br_netfilter_init(void); 734 extern void br_netfilter_fini(void); 735 extern void br_netfilter_rtable_init(struct net_bridge *); 736 #else 737 #define br_netfilter_init() (0) 738 #define br_netfilter_fini() do { } while(0) 739 #define br_netfilter_rtable_init(x) 740 #endif 741 742 /* br_stp.c */ 743 extern void br_log_state(const struct net_bridge_port *p); 744 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 745 u16 port_no); 746 extern void br_init_port(struct net_bridge_port *p); 747 extern void br_become_designated_port(struct net_bridge_port *p); 748 749 extern void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 750 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x); 751 extern int br_set_hello_time(struct net_bridge *br, unsigned long x); 752 extern int br_set_max_age(struct net_bridge *br, unsigned long x); 753 754 755 /* br_stp_if.c */ 756 extern void br_stp_enable_bridge(struct net_bridge *br); 757 extern void br_stp_disable_bridge(struct net_bridge *br); 758 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 759 extern void br_stp_enable_port(struct net_bridge_port *p); 760 extern void br_stp_disable_port(struct net_bridge_port *p); 761 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); 762 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 763 extern void br_stp_set_bridge_priority(struct net_bridge *br, 764 u16 newprio); 765 extern int br_stp_set_port_priority(struct net_bridge_port *p, 766 unsigned long newprio); 767 extern int br_stp_set_path_cost(struct net_bridge_port *p, 768 unsigned long path_cost); 769 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 770 771 /* br_stp_bpdu.c */ 772 struct stp_proto; 773 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 774 struct net_device *dev); 775 776 /* br_stp_timer.c */ 777 extern void br_stp_timer_init(struct net_bridge *br); 778 extern void br_stp_port_timer_init(struct net_bridge_port *p); 779 extern unsigned long br_timer_value(const struct timer_list *timer); 780 781 /* br.c */ 782 #if IS_ENABLED(CONFIG_ATM_LANE) 783 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 784 #endif 785 786 /* br_netlink.c */ 787 extern struct rtnl_link_ops br_link_ops; 788 extern int br_netlink_init(void); 789 extern void br_netlink_fini(void); 790 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 791 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 792 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 793 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, 794 struct net_device *dev, u32 filter_mask); 795 796 #ifdef CONFIG_SYSFS 797 /* br_sysfs_if.c */ 798 extern const struct sysfs_ops brport_sysfs_ops; 799 extern int br_sysfs_addif(struct net_bridge_port *p); 800 extern int br_sysfs_renameif(struct net_bridge_port *p); 801 802 /* br_sysfs_br.c */ 803 extern int br_sysfs_addbr(struct net_device *dev); 804 extern void br_sysfs_delbr(struct net_device *dev); 805 806 #else 807 808 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 809 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 810 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 811 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 812 #endif /* CONFIG_SYSFS */ 813 814 #endif 815