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