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 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 178 179 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 180 struct bridge_mcast_query ip4_query; 181 #if IS_ENABLED(CONFIG_IPV6) 182 struct bridge_mcast_query ip6_query; 183 #endif /* IS_ENABLED(CONFIG_IPV6) */ 184 unsigned char multicast_router; 185 struct timer_list multicast_router_timer; 186 struct hlist_head mglist; 187 struct hlist_node rlist; 188 #endif 189 190 #ifdef CONFIG_SYSFS 191 char sysfs_name[IFNAMSIZ]; 192 #endif 193 194 #ifdef CONFIG_NET_POLL_CONTROLLER 195 struct netpoll *np; 196 #endif 197 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 198 struct net_port_vlans __rcu *vlan_info; 199 #endif 200 }; 201 202 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 203 204 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 205 206 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 207 { 208 return rcu_dereference(dev->rx_handler_data); 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 net_bridge 218 { 219 spinlock_t lock; 220 struct list_head port_list; 221 struct net_device *dev; 222 223 struct pcpu_sw_netstats __percpu *stats; 224 spinlock_t hash_lock; 225 struct hlist_head hash[BR_HASH_SIZE]; 226 #ifdef CONFIG_BRIDGE_NETFILTER 227 struct rtable fake_rtable; 228 bool nf_call_iptables; 229 bool nf_call_ip6tables; 230 bool nf_call_arptables; 231 #endif 232 u16 group_fwd_mask; 233 234 /* STP */ 235 bridge_id designated_root; 236 bridge_id bridge_id; 237 u32 root_path_cost; 238 unsigned long max_age; 239 unsigned long hello_time; 240 unsigned long forward_delay; 241 unsigned long bridge_max_age; 242 unsigned long ageing_time; 243 unsigned long bridge_hello_time; 244 unsigned long bridge_forward_delay; 245 246 u8 group_addr[ETH_ALEN]; 247 u16 root_port; 248 249 enum { 250 BR_NO_STP, /* no spanning tree */ 251 BR_KERNEL_STP, /* old STP in kernel */ 252 BR_USER_STP, /* new RSTP in userspace */ 253 } stp_enabled; 254 255 unsigned char topology_change; 256 unsigned char topology_change_detected; 257 258 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 259 unsigned char multicast_router; 260 261 u8 multicast_disabled:1; 262 u8 multicast_querier:1; 263 u8 multicast_query_use_ifaddr:1; 264 265 u32 hash_elasticity; 266 u32 hash_max; 267 268 u32 multicast_last_member_count; 269 u32 multicast_startup_query_count; 270 271 unsigned long multicast_last_member_interval; 272 unsigned long multicast_membership_interval; 273 unsigned long multicast_querier_interval; 274 unsigned long multicast_query_interval; 275 unsigned long multicast_query_response_interval; 276 unsigned long multicast_startup_query_interval; 277 278 spinlock_t multicast_lock; 279 struct net_bridge_mdb_htable __rcu *mdb; 280 struct hlist_head router_list; 281 282 struct timer_list multicast_router_timer; 283 struct bridge_mcast_querier ip4_querier; 284 struct bridge_mcast_query ip4_query; 285 #if IS_ENABLED(CONFIG_IPV6) 286 struct bridge_mcast_querier ip6_querier; 287 struct bridge_mcast_query ip6_query; 288 #endif /* IS_ENABLED(CONFIG_IPV6) */ 289 #endif 290 291 struct timer_list hello_timer; 292 struct timer_list tcn_timer; 293 struct timer_list topology_change_timer; 294 struct timer_list gc_timer; 295 struct kobject *ifobj; 296 u32 auto_cnt; 297 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 298 u8 vlan_enabled; 299 struct net_port_vlans __rcu *vlan_info; 300 #endif 301 }; 302 303 struct br_input_skb_cb { 304 struct net_device *brdev; 305 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 306 int igmp; 307 int mrouters_only; 308 #endif 309 }; 310 311 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 312 313 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 314 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 315 #else 316 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 317 #endif 318 319 #define br_printk(level, br, format, args...) \ 320 printk(level "%s: " format, (br)->dev->name, ##args) 321 322 #define br_err(__br, format, args...) \ 323 br_printk(KERN_ERR, __br, format, ##args) 324 #define br_warn(__br, format, args...) \ 325 br_printk(KERN_WARNING, __br, format, ##args) 326 #define br_notice(__br, format, args...) \ 327 br_printk(KERN_NOTICE, __br, format, ##args) 328 #define br_info(__br, format, args...) \ 329 br_printk(KERN_INFO, __br, format, ##args) 330 331 #define br_debug(br, format, args...) \ 332 pr_debug("%s: " format, (br)->dev->name, ##args) 333 334 extern struct notifier_block br_device_notifier; 335 336 /* called under bridge lock */ 337 static inline int br_is_root_bridge(const struct net_bridge *br) 338 { 339 return !memcmp(&br->bridge_id, &br->designated_root, 8); 340 } 341 342 /* br_device.c */ 343 void br_dev_setup(struct net_device *dev); 344 void br_dev_delete(struct net_device *dev, struct list_head *list); 345 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 346 #ifdef CONFIG_NET_POLL_CONTROLLER 347 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 348 struct sk_buff *skb) 349 { 350 struct netpoll *np = p->np; 351 352 if (np) 353 netpoll_send_skb(np, skb); 354 } 355 356 int br_netpoll_enable(struct net_bridge_port *p); 357 void br_netpoll_disable(struct net_bridge_port *p); 358 #else 359 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 360 struct sk_buff *skb) 361 { 362 } 363 364 static inline int br_netpoll_enable(struct net_bridge_port *p) 365 { 366 return 0; 367 } 368 369 static inline void br_netpoll_disable(struct net_bridge_port *p) 370 { 371 } 372 #endif 373 374 /* br_fdb.c */ 375 int br_fdb_init(void); 376 void br_fdb_fini(void); 377 void br_fdb_flush(struct net_bridge *br); 378 void br_fdb_find_delete_local(struct net_bridge *br, 379 const struct net_bridge_port *p, 380 const unsigned char *addr, u16 vid); 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, bool added_by_user); 395 396 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 397 struct net_device *dev, const unsigned char *addr); 398 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 399 const unsigned char *addr, u16 nlh_flags); 400 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 401 struct net_device *dev, int idx); 402 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 403 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 404 405 /* br_forward.c */ 406 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 407 int br_dev_queue_push_xmit(struct sk_buff *skb); 408 void br_forward(const struct net_bridge_port *to, 409 struct sk_buff *skb, struct sk_buff *skb0); 410 int br_forward_finish(struct sk_buff *skb); 411 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 412 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 413 struct sk_buff *skb2, bool unicast); 414 415 /* br_if.c */ 416 void br_port_carrier_check(struct net_bridge_port *p); 417 int br_add_bridge(struct net *net, const char *name); 418 int br_del_bridge(struct net *net, const char *name); 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 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 425 426 /* br_input.c */ 427 int br_handle_frame_finish(struct sk_buff *skb); 428 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 429 430 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 431 { 432 return rcu_dereference(dev->rx_handler) == br_handle_frame; 433 } 434 435 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 436 { 437 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 438 } 439 440 /* br_ioctl.c */ 441 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 442 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 443 void __user *arg); 444 445 /* br_multicast.c */ 446 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 447 extern unsigned int br_mdb_rehash_seq; 448 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 449 struct sk_buff *skb, u16 vid); 450 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 451 struct sk_buff *skb, u16 vid); 452 void br_multicast_add_port(struct net_bridge_port *port); 453 void br_multicast_del_port(struct net_bridge_port *port); 454 void br_multicast_enable_port(struct net_bridge_port *port); 455 void br_multicast_disable_port(struct net_bridge_port *port); 456 void br_multicast_init(struct net_bridge *br); 457 void br_multicast_open(struct net_bridge *br); 458 void br_multicast_stop(struct net_bridge *br); 459 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 460 struct sk_buff *skb); 461 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 462 struct sk_buff *skb, struct sk_buff *skb2); 463 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 464 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 465 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 466 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 467 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 468 struct net_bridge_mdb_entry * 469 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 470 struct net_bridge_mdb_entry * 471 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 472 struct br_ip *group); 473 void br_multicast_free_pg(struct rcu_head *head); 474 struct net_bridge_port_group * 475 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 476 struct net_bridge_port_group __rcu *next, 477 unsigned char state); 478 void br_mdb_init(void); 479 void br_mdb_uninit(void); 480 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 481 struct br_ip *group, int type); 482 483 #define mlock_dereference(X, br) \ 484 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 485 486 static inline bool br_multicast_is_router(struct net_bridge *br) 487 { 488 return br->multicast_router == 2 || 489 (br->multicast_router == 1 && 490 timer_pending(&br->multicast_router_timer)); 491 } 492 493 static inline bool 494 __br_multicast_querier_exists(struct net_bridge *br, 495 struct bridge_mcast_querier *querier) 496 { 497 return time_is_before_jiffies(querier->delay_time) && 498 (br->multicast_querier || timer_pending(&querier->timer)); 499 } 500 501 static inline bool br_multicast_querier_exists(struct net_bridge *br, 502 struct ethhdr *eth) 503 { 504 switch (eth->h_proto) { 505 case (htons(ETH_P_IP)): 506 return __br_multicast_querier_exists(br, &br->ip4_querier); 507 #if IS_ENABLED(CONFIG_IPV6) 508 case (htons(ETH_P_IPV6)): 509 return __br_multicast_querier_exists(br, &br->ip6_querier); 510 #endif 511 default: 512 return false; 513 } 514 } 515 #else 516 static inline int br_multicast_rcv(struct net_bridge *br, 517 struct net_bridge_port *port, 518 struct sk_buff *skb, 519 u16 vid) 520 { 521 return 0; 522 } 523 524 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 525 struct sk_buff *skb, u16 vid) 526 { 527 return NULL; 528 } 529 530 static inline void br_multicast_add_port(struct net_bridge_port *port) 531 { 532 } 533 534 static inline void br_multicast_del_port(struct net_bridge_port *port) 535 { 536 } 537 538 static inline void br_multicast_enable_port(struct net_bridge_port *port) 539 { 540 } 541 542 static inline void br_multicast_disable_port(struct net_bridge_port *port) 543 { 544 } 545 546 static inline void br_multicast_init(struct net_bridge *br) 547 { 548 } 549 550 static inline void br_multicast_open(struct net_bridge *br) 551 { 552 } 553 554 static inline void br_multicast_stop(struct net_bridge *br) 555 { 556 } 557 558 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 559 struct sk_buff *skb) 560 { 561 } 562 563 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 564 struct sk_buff *skb, 565 struct sk_buff *skb2) 566 { 567 } 568 static inline bool br_multicast_is_router(struct net_bridge *br) 569 { 570 return 0; 571 } 572 static inline bool br_multicast_querier_exists(struct net_bridge *br, 573 struct ethhdr *eth) 574 { 575 return false; 576 } 577 static inline void br_mdb_init(void) 578 { 579 } 580 static inline void br_mdb_uninit(void) 581 { 582 } 583 #endif 584 585 /* br_vlan.c */ 586 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 587 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 588 struct sk_buff *skb, u16 *vid); 589 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 590 const struct sk_buff *skb); 591 struct sk_buff *br_handle_vlan(struct net_bridge *br, 592 const struct net_port_vlans *v, 593 struct sk_buff *skb); 594 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 595 int br_vlan_delete(struct net_bridge *br, u16 vid); 596 void br_vlan_flush(struct net_bridge *br); 597 bool br_vlan_find(struct net_bridge *br, u16 vid); 598 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 599 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 600 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 601 void nbp_vlan_flush(struct net_bridge_port *port); 602 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 603 604 static inline struct net_port_vlans *br_get_vlan_info( 605 const struct net_bridge *br) 606 { 607 return rcu_dereference_rtnl(br->vlan_info); 608 } 609 610 static inline struct net_port_vlans *nbp_get_vlan_info( 611 const struct net_bridge_port *p) 612 { 613 return rcu_dereference_rtnl(p->vlan_info); 614 } 615 616 /* Since bridge now depends on 8021Q module, but the time bridge sees the 617 * skb, the vlan tag will always be present if the frame was tagged. 618 */ 619 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 620 { 621 int err = 0; 622 623 if (vlan_tx_tag_present(skb)) 624 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 625 else { 626 *vid = 0; 627 err = -EINVAL; 628 } 629 630 return err; 631 } 632 633 static inline u16 br_get_pvid(const struct net_port_vlans *v) 634 { 635 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 636 * vid wasn't set 637 */ 638 smp_rmb(); 639 return v->pvid ?: VLAN_N_VID; 640 } 641 642 #else 643 static inline bool br_allowed_ingress(struct net_bridge *br, 644 struct net_port_vlans *v, 645 struct sk_buff *skb, 646 u16 *vid) 647 { 648 return true; 649 } 650 651 static inline bool br_allowed_egress(struct net_bridge *br, 652 const struct net_port_vlans *v, 653 const struct sk_buff *skb) 654 { 655 return true; 656 } 657 658 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 659 const struct net_port_vlans *v, 660 struct sk_buff *skb) 661 { 662 return skb; 663 } 664 665 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 666 { 667 return -EOPNOTSUPP; 668 } 669 670 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 671 { 672 return -EOPNOTSUPP; 673 } 674 675 static inline void br_vlan_flush(struct net_bridge *br) 676 { 677 } 678 679 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 680 { 681 return false; 682 } 683 684 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 685 { 686 return -EOPNOTSUPP; 687 } 688 689 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 690 { 691 return -EOPNOTSUPP; 692 } 693 694 static inline void nbp_vlan_flush(struct net_bridge_port *port) 695 { 696 } 697 698 static inline struct net_port_vlans *br_get_vlan_info( 699 const struct net_bridge *br) 700 { 701 return NULL; 702 } 703 static inline struct net_port_vlans *nbp_get_vlan_info( 704 const struct net_bridge_port *p) 705 { 706 return NULL; 707 } 708 709 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 710 { 711 return false; 712 } 713 714 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 715 { 716 return 0; 717 } 718 static inline u16 br_get_pvid(const struct net_port_vlans *v) 719 { 720 return VLAN_N_VID; /* Returns invalid vid */ 721 } 722 #endif 723 724 /* br_netfilter.c */ 725 #ifdef CONFIG_BRIDGE_NETFILTER 726 int br_netfilter_init(void); 727 void br_netfilter_fini(void); 728 void br_netfilter_rtable_init(struct net_bridge *); 729 #else 730 #define br_netfilter_init() (0) 731 #define br_netfilter_fini() do { } while (0) 732 #define br_netfilter_rtable_init(x) 733 #endif 734 735 /* br_stp.c */ 736 void br_log_state(const struct net_bridge_port *p); 737 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 738 void br_init_port(struct net_bridge_port *p); 739 void br_become_designated_port(struct net_bridge_port *p); 740 741 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 742 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 743 int br_set_hello_time(struct net_bridge *br, unsigned long x); 744 int br_set_max_age(struct net_bridge *br, unsigned long x); 745 746 747 /* br_stp_if.c */ 748 void br_stp_enable_bridge(struct net_bridge *br); 749 void br_stp_disable_bridge(struct net_bridge *br); 750 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 751 void br_stp_enable_port(struct net_bridge_port *p); 752 void br_stp_disable_port(struct net_bridge_port *p); 753 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 754 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 755 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 756 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 757 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 758 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 759 760 /* br_stp_bpdu.c */ 761 struct stp_proto; 762 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 763 struct net_device *dev); 764 765 /* br_stp_timer.c */ 766 void br_stp_timer_init(struct net_bridge *br); 767 void br_stp_port_timer_init(struct net_bridge_port *p); 768 unsigned long br_timer_value(const struct timer_list *timer); 769 770 /* br.c */ 771 #if IS_ENABLED(CONFIG_ATM_LANE) 772 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 773 #endif 774 775 /* br_netlink.c */ 776 extern struct rtnl_link_ops br_link_ops; 777 int br_netlink_init(void); 778 void br_netlink_fini(void); 779 void br_ifinfo_notify(int event, struct net_bridge_port *port); 780 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 781 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 782 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 783 u32 filter_mask); 784 785 #ifdef CONFIG_SYSFS 786 /* br_sysfs_if.c */ 787 extern const struct sysfs_ops brport_sysfs_ops; 788 int br_sysfs_addif(struct net_bridge_port *p); 789 int br_sysfs_renameif(struct net_bridge_port *p); 790 791 /* br_sysfs_br.c */ 792 int br_sysfs_addbr(struct net_device *dev); 793 void br_sysfs_delbr(struct net_device *dev); 794 795 #else 796 797 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 798 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 799 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 800 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 801 #endif /* CONFIG_SYSFS */ 802 803 #endif 804