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[ETH_ALEN]; 50 }; 51 52 struct mac_addr 53 { 54 unsigned char addr[ETH_ALEN]; 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 unsigned char added_by_user; 108 __u16 vlan_id; 109 }; 110 111 struct net_bridge_port_group { 112 struct net_bridge_port *port; 113 struct net_bridge_port_group __rcu *next; 114 struct hlist_node mglist; 115 struct rcu_head rcu; 116 struct timer_list timer; 117 struct br_ip addr; 118 unsigned char state; 119 }; 120 121 struct net_bridge_mdb_entry 122 { 123 struct hlist_node hlist[2]; 124 struct net_bridge *br; 125 struct net_bridge_port_group __rcu *ports; 126 struct rcu_head rcu; 127 struct timer_list timer; 128 struct br_ip addr; 129 bool mglist; 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 net_bridge 215 { 216 spinlock_t lock; 217 struct list_head port_list; 218 struct net_device *dev; 219 220 struct pcpu_sw_netstats __percpu *stats; 221 spinlock_t hash_lock; 222 struct hlist_head hash[BR_HASH_SIZE]; 223 #ifdef CONFIG_BRIDGE_NETFILTER 224 struct rtable fake_rtable; 225 bool nf_call_iptables; 226 bool nf_call_ip6tables; 227 bool nf_call_arptables; 228 #endif 229 u16 group_fwd_mask; 230 231 /* STP */ 232 bridge_id designated_root; 233 bridge_id bridge_id; 234 u32 root_path_cost; 235 unsigned long max_age; 236 unsigned long hello_time; 237 unsigned long forward_delay; 238 unsigned long bridge_max_age; 239 unsigned long ageing_time; 240 unsigned long bridge_hello_time; 241 unsigned long bridge_forward_delay; 242 243 u8 group_addr[ETH_ALEN]; 244 u16 root_port; 245 246 enum { 247 BR_NO_STP, /* no spanning tree */ 248 BR_KERNEL_STP, /* old STP in kernel */ 249 BR_USER_STP, /* new RSTP in userspace */ 250 } stp_enabled; 251 252 unsigned char topology_change; 253 unsigned char topology_change_detected; 254 255 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 256 unsigned char multicast_router; 257 258 u8 multicast_disabled:1; 259 u8 multicast_querier:1; 260 u8 multicast_query_use_ifaddr:1; 261 262 u32 hash_elasticity; 263 u32 hash_max; 264 265 u32 multicast_last_member_count; 266 u32 multicast_startup_query_count; 267 268 unsigned long multicast_last_member_interval; 269 unsigned long multicast_membership_interval; 270 unsigned long multicast_querier_interval; 271 unsigned long multicast_query_interval; 272 unsigned long multicast_query_response_interval; 273 unsigned long multicast_startup_query_interval; 274 275 spinlock_t multicast_lock; 276 struct net_bridge_mdb_htable __rcu *mdb; 277 struct hlist_head router_list; 278 279 struct timer_list multicast_router_timer; 280 struct bridge_mcast_querier ip4_querier; 281 struct bridge_mcast_query ip4_query; 282 #if IS_ENABLED(CONFIG_IPV6) 283 struct bridge_mcast_querier ip6_querier; 284 struct bridge_mcast_query ip6_query; 285 #endif /* IS_ENABLED(CONFIG_IPV6) */ 286 #endif 287 288 struct timer_list hello_timer; 289 struct timer_list tcn_timer; 290 struct timer_list topology_change_timer; 291 struct timer_list gc_timer; 292 struct kobject *ifobj; 293 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 294 u8 vlan_enabled; 295 struct net_port_vlans __rcu *vlan_info; 296 #endif 297 }; 298 299 struct br_input_skb_cb { 300 struct net_device *brdev; 301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 302 int igmp; 303 int mrouters_only; 304 #endif 305 }; 306 307 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 308 309 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 310 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 311 #else 312 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 313 #endif 314 315 #define br_printk(level, br, format, args...) \ 316 printk(level "%s: " format, (br)->dev->name, ##args) 317 318 #define br_err(__br, format, args...) \ 319 br_printk(KERN_ERR, __br, format, ##args) 320 #define br_warn(__br, format, args...) \ 321 br_printk(KERN_WARNING, __br, format, ##args) 322 #define br_notice(__br, format, args...) \ 323 br_printk(KERN_NOTICE, __br, format, ##args) 324 #define br_info(__br, format, args...) \ 325 br_printk(KERN_INFO, __br, format, ##args) 326 327 #define br_debug(br, format, args...) \ 328 pr_debug("%s: " format, (br)->dev->name, ##args) 329 330 extern struct notifier_block br_device_notifier; 331 332 /* called under bridge lock */ 333 static inline int br_is_root_bridge(const struct net_bridge *br) 334 { 335 return !memcmp(&br->bridge_id, &br->designated_root, 8); 336 } 337 338 /* br_device.c */ 339 void br_dev_setup(struct net_device *dev); 340 void br_dev_delete(struct net_device *dev, struct list_head *list); 341 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 342 #ifdef CONFIG_NET_POLL_CONTROLLER 343 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 344 struct sk_buff *skb) 345 { 346 struct netpoll *np = p->np; 347 348 if (np) 349 netpoll_send_skb(np, skb); 350 } 351 352 int br_netpoll_enable(struct net_bridge_port *p); 353 void br_netpoll_disable(struct net_bridge_port *p); 354 #else 355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 356 struct sk_buff *skb) 357 { 358 } 359 360 static inline int br_netpoll_enable(struct net_bridge_port *p) 361 { 362 return 0; 363 } 364 365 static inline void br_netpoll_disable(struct net_bridge_port *p) 366 { 367 } 368 #endif 369 370 /* br_fdb.c */ 371 int br_fdb_init(void); 372 void br_fdb_fini(void); 373 void br_fdb_flush(struct net_bridge *br); 374 void br_fdb_find_delete_local(struct net_bridge *br, 375 const struct net_bridge_port *p, 376 const unsigned char *addr, u16 vid); 377 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 378 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 379 void br_fdb_cleanup(unsigned long arg); 380 void br_fdb_delete_by_port(struct net_bridge *br, 381 const struct net_bridge_port *p, int do_all); 382 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 383 const unsigned char *addr, __u16 vid); 384 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 385 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 386 unsigned long off); 387 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 388 const unsigned char *addr, u16 vid); 389 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 390 const unsigned char *addr, u16 vid, bool added_by_user); 391 392 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 393 struct net_device *dev, const unsigned char *addr); 394 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 395 const unsigned char *addr, u16 nlh_flags); 396 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 397 struct net_device *dev, int idx); 398 399 /* br_forward.c */ 400 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 401 int br_dev_queue_push_xmit(struct sk_buff *skb); 402 void br_forward(const struct net_bridge_port *to, 403 struct sk_buff *skb, struct sk_buff *skb0); 404 int br_forward_finish(struct sk_buff *skb); 405 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 406 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 407 struct sk_buff *skb2, bool unicast); 408 409 /* br_if.c */ 410 void br_port_carrier_check(struct net_bridge_port *p); 411 int br_add_bridge(struct net *net, const char *name); 412 int br_del_bridge(struct net *net, const char *name); 413 int br_add_if(struct net_bridge *br, struct net_device *dev); 414 int br_del_if(struct net_bridge *br, struct net_device *dev); 415 int br_min_mtu(const struct net_bridge *br); 416 netdev_features_t br_features_recompute(struct net_bridge *br, 417 netdev_features_t features); 418 419 /* br_input.c */ 420 int br_handle_frame_finish(struct sk_buff *skb); 421 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 422 423 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 424 { 425 return rcu_dereference(dev->rx_handler) == br_handle_frame; 426 } 427 428 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 429 { 430 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 431 } 432 433 /* br_ioctl.c */ 434 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 435 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 436 void __user *arg); 437 438 /* br_multicast.c */ 439 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 440 extern unsigned int br_mdb_rehash_seq; 441 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 442 struct sk_buff *skb, u16 vid); 443 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 444 struct sk_buff *skb, u16 vid); 445 void br_multicast_add_port(struct net_bridge_port *port); 446 void br_multicast_del_port(struct net_bridge_port *port); 447 void br_multicast_enable_port(struct net_bridge_port *port); 448 void br_multicast_disable_port(struct net_bridge_port *port); 449 void br_multicast_init(struct net_bridge *br); 450 void br_multicast_open(struct net_bridge *br); 451 void br_multicast_stop(struct net_bridge *br); 452 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 453 struct sk_buff *skb); 454 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 455 struct sk_buff *skb, struct sk_buff *skb2); 456 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 457 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 458 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 459 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 460 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 461 struct net_bridge_mdb_entry * 462 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 463 struct net_bridge_mdb_entry * 464 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 465 struct br_ip *group); 466 void br_multicast_free_pg(struct rcu_head *head); 467 struct net_bridge_port_group * 468 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 469 struct net_bridge_port_group __rcu *next, 470 unsigned char state); 471 void br_mdb_init(void); 472 void br_mdb_uninit(void); 473 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 static inline bool br_multicast_is_router(struct net_bridge *br) 480 { 481 return br->multicast_router == 2 || 482 (br->multicast_router == 1 && 483 timer_pending(&br->multicast_router_timer)); 484 } 485 486 static inline bool 487 __br_multicast_querier_exists(struct net_bridge *br, 488 struct bridge_mcast_querier *querier) 489 { 490 return time_is_before_jiffies(querier->delay_time) && 491 (br->multicast_querier || timer_pending(&querier->timer)); 492 } 493 494 static inline bool br_multicast_querier_exists(struct net_bridge *br, 495 struct ethhdr *eth) 496 { 497 switch (eth->h_proto) { 498 case (htons(ETH_P_IP)): 499 return __br_multicast_querier_exists(br, &br->ip4_querier); 500 #if IS_ENABLED(CONFIG_IPV6) 501 case (htons(ETH_P_IPV6)): 502 return __br_multicast_querier_exists(br, &br->ip6_querier); 503 #endif 504 default: 505 return false; 506 } 507 } 508 #else 509 static inline int br_multicast_rcv(struct net_bridge *br, 510 struct net_bridge_port *port, 511 struct sk_buff *skb, 512 u16 vid) 513 { 514 return 0; 515 } 516 517 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 518 struct sk_buff *skb, u16 vid) 519 { 520 return NULL; 521 } 522 523 static inline void br_multicast_add_port(struct net_bridge_port *port) 524 { 525 } 526 527 static inline void br_multicast_del_port(struct net_bridge_port *port) 528 { 529 } 530 531 static inline void br_multicast_enable_port(struct net_bridge_port *port) 532 { 533 } 534 535 static inline void br_multicast_disable_port(struct net_bridge_port *port) 536 { 537 } 538 539 static inline void br_multicast_init(struct net_bridge *br) 540 { 541 } 542 543 static inline void br_multicast_open(struct net_bridge *br) 544 { 545 } 546 547 static inline void br_multicast_stop(struct net_bridge *br) 548 { 549 } 550 551 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 552 struct sk_buff *skb) 553 { 554 } 555 556 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 557 struct sk_buff *skb, 558 struct sk_buff *skb2) 559 { 560 } 561 static inline bool br_multicast_is_router(struct net_bridge *br) 562 { 563 return 0; 564 } 565 static inline bool br_multicast_querier_exists(struct net_bridge *br, 566 struct ethhdr *eth) 567 { 568 return false; 569 } 570 static inline void br_mdb_init(void) 571 { 572 } 573 static inline void br_mdb_uninit(void) 574 { 575 } 576 #endif 577 578 /* br_vlan.c */ 579 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 580 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 581 struct sk_buff *skb, u16 *vid); 582 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 583 const struct sk_buff *skb); 584 struct sk_buff *br_handle_vlan(struct net_bridge *br, 585 const struct net_port_vlans *v, 586 struct sk_buff *skb); 587 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 588 int br_vlan_delete(struct net_bridge *br, u16 vid); 589 void br_vlan_flush(struct net_bridge *br); 590 bool br_vlan_find(struct net_bridge *br, u16 vid); 591 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 592 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 593 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 594 void nbp_vlan_flush(struct net_bridge_port *port); 595 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 596 597 static inline struct net_port_vlans *br_get_vlan_info( 598 const struct net_bridge *br) 599 { 600 return rcu_dereference_rtnl(br->vlan_info); 601 } 602 603 static inline struct net_port_vlans *nbp_get_vlan_info( 604 const struct net_bridge_port *p) 605 { 606 return rcu_dereference_rtnl(p->vlan_info); 607 } 608 609 /* Since bridge now depends on 8021Q module, but the time bridge sees the 610 * skb, the vlan tag will always be present if the frame was tagged. 611 */ 612 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 613 { 614 int err = 0; 615 616 if (vlan_tx_tag_present(skb)) 617 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 618 else { 619 *vid = 0; 620 err = -EINVAL; 621 } 622 623 return err; 624 } 625 626 static inline u16 br_get_pvid(const struct net_port_vlans *v) 627 { 628 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 629 * vid wasn't set 630 */ 631 smp_rmb(); 632 return v->pvid ?: VLAN_N_VID; 633 } 634 635 #else 636 static inline bool br_allowed_ingress(struct net_bridge *br, 637 struct net_port_vlans *v, 638 struct sk_buff *skb, 639 u16 *vid) 640 { 641 return true; 642 } 643 644 static inline bool br_allowed_egress(struct net_bridge *br, 645 const struct net_port_vlans *v, 646 const struct sk_buff *skb) 647 { 648 return true; 649 } 650 651 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 652 const struct net_port_vlans *v, 653 struct sk_buff *skb) 654 { 655 return skb; 656 } 657 658 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 659 { 660 return -EOPNOTSUPP; 661 } 662 663 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 664 { 665 return -EOPNOTSUPP; 666 } 667 668 static inline void br_vlan_flush(struct net_bridge *br) 669 { 670 } 671 672 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 673 { 674 return false; 675 } 676 677 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 678 { 679 return -EOPNOTSUPP; 680 } 681 682 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 683 { 684 return -EOPNOTSUPP; 685 } 686 687 static inline void nbp_vlan_flush(struct net_bridge_port *port) 688 { 689 } 690 691 static inline struct net_port_vlans *br_get_vlan_info( 692 const struct net_bridge *br) 693 { 694 return NULL; 695 } 696 static inline struct net_port_vlans *nbp_get_vlan_info( 697 const struct net_bridge_port *p) 698 { 699 return NULL; 700 } 701 702 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 703 { 704 return false; 705 } 706 707 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 708 { 709 return 0; 710 } 711 static inline u16 br_get_pvid(const struct net_port_vlans *v) 712 { 713 return VLAN_N_VID; /* Returns invalid vid */ 714 } 715 #endif 716 717 /* br_netfilter.c */ 718 #ifdef CONFIG_BRIDGE_NETFILTER 719 int br_netfilter_init(void); 720 void br_netfilter_fini(void); 721 void br_netfilter_rtable_init(struct net_bridge *); 722 #else 723 #define br_netfilter_init() (0) 724 #define br_netfilter_fini() do { } while (0) 725 #define br_netfilter_rtable_init(x) 726 #endif 727 728 /* br_stp.c */ 729 void br_log_state(const struct net_bridge_port *p); 730 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 731 void br_init_port(struct net_bridge_port *p); 732 void br_become_designated_port(struct net_bridge_port *p); 733 734 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 735 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 736 int br_set_hello_time(struct net_bridge *br, unsigned long x); 737 int br_set_max_age(struct net_bridge *br, unsigned long x); 738 739 740 /* br_stp_if.c */ 741 void br_stp_enable_bridge(struct net_bridge *br); 742 void br_stp_disable_bridge(struct net_bridge *br); 743 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 744 void br_stp_enable_port(struct net_bridge_port *p); 745 void br_stp_disable_port(struct net_bridge_port *p); 746 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 747 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 748 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 749 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 750 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 751 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 752 753 /* br_stp_bpdu.c */ 754 struct stp_proto; 755 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 756 struct net_device *dev); 757 758 /* br_stp_timer.c */ 759 void br_stp_timer_init(struct net_bridge *br); 760 void br_stp_port_timer_init(struct net_bridge_port *p); 761 unsigned long br_timer_value(const struct timer_list *timer); 762 763 /* br.c */ 764 #if IS_ENABLED(CONFIG_ATM_LANE) 765 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 766 #endif 767 768 /* br_netlink.c */ 769 extern struct rtnl_link_ops br_link_ops; 770 int br_netlink_init(void); 771 void br_netlink_fini(void); 772 void br_ifinfo_notify(int event, struct net_bridge_port *port); 773 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 774 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 775 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 776 u32 filter_mask); 777 778 #ifdef CONFIG_SYSFS 779 /* br_sysfs_if.c */ 780 extern const struct sysfs_ops brport_sysfs_ops; 781 int br_sysfs_addif(struct net_bridge_port *p); 782 int br_sysfs_renameif(struct net_bridge_port *p); 783 784 /* br_sysfs_br.c */ 785 int br_sysfs_addbr(struct net_device *dev); 786 void br_sysfs_delbr(struct net_device *dev); 787 788 #else 789 790 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 791 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 792 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 793 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 794 #endif /* CONFIG_SYSFS */ 795 796 #endif 797