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 void br_dev_setup(struct net_device *dev); 347 void br_dev_delete(struct net_device *dev, struct list_head *list); 348 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 349 #ifdef CONFIG_NET_POLL_CONTROLLER 350 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 351 struct sk_buff *skb) 352 { 353 struct netpoll *np = p->np; 354 355 if (np) 356 netpoll_send_skb(np, skb); 357 } 358 359 int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp); 360 void br_netpoll_disable(struct net_bridge_port *p); 361 #else 362 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 363 struct sk_buff *skb) 364 { 365 } 366 367 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp) 368 { 369 return 0; 370 } 371 372 static inline void br_netpoll_disable(struct net_bridge_port *p) 373 { 374 } 375 #endif 376 377 /* br_fdb.c */ 378 int br_fdb_init(void); 379 void br_fdb_fini(void); 380 void br_fdb_flush(struct net_bridge *br); 381 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 382 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 383 void br_fdb_cleanup(unsigned long arg); 384 void br_fdb_delete_by_port(struct net_bridge *br, 385 const struct net_bridge_port *p, int do_all); 386 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 387 const unsigned char *addr, __u16 vid); 388 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 389 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 390 unsigned long off); 391 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 392 const unsigned char *addr, u16 vid); 393 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 394 const unsigned char *addr, u16 vid); 395 int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid); 396 397 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 398 struct net_device *dev, const unsigned char *addr); 399 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 400 const unsigned char *addr, u16 nlh_flags); 401 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 402 struct net_device *dev, int idx); 403 404 /* br_forward.c */ 405 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 406 int br_dev_queue_push_xmit(struct sk_buff *skb); 407 void br_forward(const struct net_bridge_port *to, 408 struct sk_buff *skb, struct sk_buff *skb0); 409 int br_forward_finish(struct sk_buff *skb); 410 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 411 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 412 struct sk_buff *skb2, bool unicast); 413 414 /* br_if.c */ 415 void br_port_carrier_check(struct net_bridge_port *p); 416 int br_add_bridge(struct net *net, const char *name); 417 int br_del_bridge(struct net *net, const char *name); 418 void br_net_exit(struct net *net); 419 int br_add_if(struct net_bridge *br, struct net_device *dev); 420 int br_del_if(struct net_bridge *br, struct net_device *dev); 421 int br_min_mtu(const struct net_bridge *br); 422 netdev_features_t br_features_recompute(struct net_bridge *br, 423 netdev_features_t features); 424 425 /* br_input.c */ 426 int br_handle_frame_finish(struct sk_buff *skb); 427 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 428 429 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 430 { 431 return rcu_dereference(dev->rx_handler) == br_handle_frame; 432 } 433 434 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 435 { 436 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 437 } 438 439 /* br_ioctl.c */ 440 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 441 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 442 void __user *arg); 443 444 /* br_multicast.c */ 445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 446 extern unsigned int br_mdb_rehash_seq; 447 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 448 struct sk_buff *skb, u16 vid); 449 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 450 struct sk_buff *skb, u16 vid); 451 void br_multicast_add_port(struct net_bridge_port *port); 452 void br_multicast_del_port(struct net_bridge_port *port); 453 void br_multicast_enable_port(struct net_bridge_port *port); 454 void br_multicast_disable_port(struct net_bridge_port *port); 455 void br_multicast_init(struct net_bridge *br); 456 void br_multicast_open(struct net_bridge *br); 457 void br_multicast_stop(struct net_bridge *br); 458 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 459 struct sk_buff *skb); 460 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 461 struct sk_buff *skb, struct sk_buff *skb2); 462 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 463 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 464 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 465 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 466 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 467 struct net_bridge_mdb_entry * 468 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 469 struct net_bridge_mdb_entry * 470 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 471 struct br_ip *group); 472 void br_multicast_free_pg(struct rcu_head *head); 473 struct net_bridge_port_group * 474 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 475 struct net_bridge_port_group __rcu *next, 476 unsigned char state); 477 void br_mdb_init(void); 478 void br_mdb_uninit(void); 479 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 480 struct br_ip *group, int type); 481 482 #define mlock_dereference(X, br) \ 483 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 484 485 static inline bool br_multicast_is_router(struct net_bridge *br) 486 { 487 return br->multicast_router == 2 || 488 (br->multicast_router == 1 && 489 timer_pending(&br->multicast_router_timer)); 490 } 491 492 static inline bool 493 __br_multicast_querier_exists(struct net_bridge *br, 494 struct bridge_mcast_querier *querier) 495 { 496 return time_is_before_jiffies(querier->delay_time) && 497 (br->multicast_querier || timer_pending(&querier->timer)); 498 } 499 500 static inline bool br_multicast_querier_exists(struct net_bridge *br, 501 struct ethhdr *eth) 502 { 503 switch (eth->h_proto) { 504 case (htons(ETH_P_IP)): 505 return __br_multicast_querier_exists(br, &br->ip4_querier); 506 #if IS_ENABLED(CONFIG_IPV6) 507 case (htons(ETH_P_IPV6)): 508 return __br_multicast_querier_exists(br, &br->ip6_querier); 509 #endif 510 default: 511 return false; 512 } 513 } 514 #else 515 static inline int br_multicast_rcv(struct net_bridge *br, 516 struct net_bridge_port *port, 517 struct sk_buff *skb, 518 u16 vid) 519 { 520 return 0; 521 } 522 523 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 524 struct sk_buff *skb, u16 vid) 525 { 526 return NULL; 527 } 528 529 static inline void br_multicast_add_port(struct net_bridge_port *port) 530 { 531 } 532 533 static inline void br_multicast_del_port(struct net_bridge_port *port) 534 { 535 } 536 537 static inline void br_multicast_enable_port(struct net_bridge_port *port) 538 { 539 } 540 541 static inline void br_multicast_disable_port(struct net_bridge_port *port) 542 { 543 } 544 545 static inline void br_multicast_init(struct net_bridge *br) 546 { 547 } 548 549 static inline void br_multicast_open(struct net_bridge *br) 550 { 551 } 552 553 static inline void br_multicast_stop(struct net_bridge *br) 554 { 555 } 556 557 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 558 struct sk_buff *skb) 559 { 560 } 561 562 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 563 struct sk_buff *skb, 564 struct sk_buff *skb2) 565 { 566 } 567 static inline bool br_multicast_is_router(struct net_bridge *br) 568 { 569 return 0; 570 } 571 static inline bool br_multicast_querier_exists(struct net_bridge *br, 572 struct ethhdr *eth) 573 { 574 return false; 575 } 576 static inline void br_mdb_init(void) 577 { 578 } 579 static inline void br_mdb_uninit(void) 580 { 581 } 582 #endif 583 584 /* br_vlan.c */ 585 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 586 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 587 struct sk_buff *skb, u16 *vid); 588 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 589 const struct sk_buff *skb); 590 struct sk_buff *br_handle_vlan(struct net_bridge *br, 591 const struct net_port_vlans *v, 592 struct sk_buff *skb); 593 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 594 int br_vlan_delete(struct net_bridge *br, u16 vid); 595 void br_vlan_flush(struct net_bridge *br); 596 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 597 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 598 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 599 void nbp_vlan_flush(struct net_bridge_port *port); 600 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 601 602 static inline struct net_port_vlans *br_get_vlan_info( 603 const struct net_bridge *br) 604 { 605 return rcu_dereference_rtnl(br->vlan_info); 606 } 607 608 static inline struct net_port_vlans *nbp_get_vlan_info( 609 const struct net_bridge_port *p) 610 { 611 return rcu_dereference_rtnl(p->vlan_info); 612 } 613 614 /* Since bridge now depends on 8021Q module, but the time bridge sees the 615 * skb, the vlan tag will always be present if the frame was tagged. 616 */ 617 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 618 { 619 int err = 0; 620 621 if (vlan_tx_tag_present(skb)) 622 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 623 else { 624 *vid = 0; 625 err = -EINVAL; 626 } 627 628 return err; 629 } 630 631 static inline u16 br_get_pvid(const struct net_port_vlans *v) 632 { 633 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 634 * vid wasn't set 635 */ 636 smp_rmb(); 637 return v->pvid ?: VLAN_N_VID; 638 } 639 640 #else 641 static inline bool br_allowed_ingress(struct net_bridge *br, 642 struct net_port_vlans *v, 643 struct sk_buff *skb, 644 u16 *vid) 645 { 646 return true; 647 } 648 649 static inline bool br_allowed_egress(struct net_bridge *br, 650 const struct net_port_vlans *v, 651 const struct sk_buff *skb) 652 { 653 return true; 654 } 655 656 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 657 const struct net_port_vlans *v, 658 struct sk_buff *skb) 659 { 660 return skb; 661 } 662 663 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 664 { 665 return -EOPNOTSUPP; 666 } 667 668 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 669 { 670 return -EOPNOTSUPP; 671 } 672 673 static inline void br_vlan_flush(struct net_bridge *br) 674 { 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