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 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 39 #define BR_GROUPFWD_8021AD 0xB801u 40 41 /* Path to usermode spanning tree program */ 42 #define BR_STP_PROG "/sbin/bridge-stp" 43 44 typedef struct bridge_id bridge_id; 45 typedef struct mac_addr mac_addr; 46 typedef __u16 port_id; 47 48 struct bridge_id 49 { 50 unsigned char prio[2]; 51 unsigned char addr[ETH_ALEN]; 52 }; 53 54 struct mac_addr 55 { 56 unsigned char addr[ETH_ALEN]; 57 }; 58 59 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 60 /* our own querier */ 61 struct bridge_mcast_own_query { 62 struct timer_list timer; 63 u32 startup_sent; 64 }; 65 66 /* other querier */ 67 struct bridge_mcast_other_query { 68 struct timer_list timer; 69 unsigned long delay_time; 70 }; 71 72 /* selected querier */ 73 struct bridge_mcast_querier { 74 struct br_ip addr; 75 struct net_bridge_port __rcu *port; 76 }; 77 #endif 78 79 struct net_port_vlans { 80 u16 port_idx; 81 u16 pvid; 82 union { 83 struct net_bridge_port *port; 84 struct net_bridge *br; 85 } parent; 86 struct rcu_head rcu; 87 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 88 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 89 u16 num_vlans; 90 }; 91 92 struct net_bridge_fdb_entry 93 { 94 struct hlist_node hlist; 95 struct net_bridge_port *dst; 96 97 struct rcu_head rcu; 98 unsigned long updated; 99 unsigned long used; 100 mac_addr addr; 101 unsigned char is_local:1, 102 is_static:1, 103 added_by_user:1, 104 added_by_external_learn:1; 105 __u16 vlan_id; 106 }; 107 108 struct net_bridge_port_group { 109 struct net_bridge_port *port; 110 struct net_bridge_port_group __rcu *next; 111 struct hlist_node mglist; 112 struct rcu_head rcu; 113 struct timer_list timer; 114 struct br_ip addr; 115 unsigned char state; 116 }; 117 118 struct net_bridge_mdb_entry 119 { 120 struct hlist_node hlist[2]; 121 struct net_bridge *br; 122 struct net_bridge_port_group __rcu *ports; 123 struct rcu_head rcu; 124 struct timer_list timer; 125 struct br_ip addr; 126 bool mglist; 127 }; 128 129 struct net_bridge_mdb_htable 130 { 131 struct hlist_head *mhash; 132 struct rcu_head rcu; 133 struct net_bridge_mdb_htable *old; 134 u32 size; 135 u32 max; 136 u32 secret; 137 u32 ver; 138 }; 139 140 struct net_bridge_port 141 { 142 struct net_bridge *br; 143 struct net_device *dev; 144 struct list_head list; 145 146 /* STP */ 147 u8 priority; 148 u8 state; 149 u16 port_no; 150 unsigned char topology_change_ack; 151 unsigned char config_pending; 152 port_id port_id; 153 port_id designated_port; 154 bridge_id designated_root; 155 bridge_id designated_bridge; 156 u32 path_cost; 157 u32 designated_cost; 158 unsigned long designated_age; 159 160 struct timer_list forward_delay_timer; 161 struct timer_list hold_timer; 162 struct timer_list message_age_timer; 163 struct kobject kobj; 164 struct rcu_head rcu; 165 166 unsigned long flags; 167 168 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 169 struct bridge_mcast_own_query ip4_own_query; 170 #if IS_ENABLED(CONFIG_IPV6) 171 struct bridge_mcast_own_query ip6_own_query; 172 #endif /* IS_ENABLED(CONFIG_IPV6) */ 173 unsigned char multicast_router; 174 struct timer_list multicast_router_timer; 175 struct hlist_head mglist; 176 struct hlist_node rlist; 177 #endif 178 179 #ifdef CONFIG_SYSFS 180 char sysfs_name[IFNAMSIZ]; 181 #endif 182 183 #ifdef CONFIG_NET_POLL_CONTROLLER 184 struct netpoll *np; 185 #endif 186 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 187 struct net_port_vlans __rcu *vlan_info; 188 #endif 189 }; 190 191 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 192 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 193 194 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 195 196 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 197 { 198 return rcu_dereference(dev->rx_handler_data); 199 } 200 201 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 202 { 203 return br_port_exists(dev) ? 204 rtnl_dereference(dev->rx_handler_data) : NULL; 205 } 206 207 struct net_bridge 208 { 209 spinlock_t lock; 210 struct list_head port_list; 211 struct net_device *dev; 212 213 struct pcpu_sw_netstats __percpu *stats; 214 spinlock_t hash_lock; 215 struct hlist_head hash[BR_HASH_SIZE]; 216 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 217 struct rtable fake_rtable; 218 bool nf_call_iptables; 219 bool nf_call_ip6tables; 220 bool nf_call_arptables; 221 #endif 222 u16 group_fwd_mask; 223 u16 group_fwd_mask_required; 224 225 /* STP */ 226 bridge_id designated_root; 227 bridge_id bridge_id; 228 u32 root_path_cost; 229 unsigned long max_age; 230 unsigned long hello_time; 231 unsigned long forward_delay; 232 unsigned long bridge_max_age; 233 unsigned long ageing_time; 234 unsigned long bridge_hello_time; 235 unsigned long bridge_forward_delay; 236 237 u8 group_addr[ETH_ALEN]; 238 bool group_addr_set; 239 u16 root_port; 240 241 enum { 242 BR_NO_STP, /* no spanning tree */ 243 BR_KERNEL_STP, /* old STP in kernel */ 244 BR_USER_STP, /* new RSTP in userspace */ 245 } stp_enabled; 246 247 unsigned char topology_change; 248 unsigned char topology_change_detected; 249 250 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 251 unsigned char multicast_router; 252 253 u8 multicast_disabled:1; 254 u8 multicast_querier:1; 255 u8 multicast_query_use_ifaddr:1; 256 257 u32 hash_elasticity; 258 u32 hash_max; 259 260 u32 multicast_last_member_count; 261 u32 multicast_startup_query_count; 262 263 unsigned long multicast_last_member_interval; 264 unsigned long multicast_membership_interval; 265 unsigned long multicast_querier_interval; 266 unsigned long multicast_query_interval; 267 unsigned long multicast_query_response_interval; 268 unsigned long multicast_startup_query_interval; 269 270 spinlock_t multicast_lock; 271 struct net_bridge_mdb_htable __rcu *mdb; 272 struct hlist_head router_list; 273 274 struct timer_list multicast_router_timer; 275 struct bridge_mcast_other_query ip4_other_query; 276 struct bridge_mcast_own_query ip4_own_query; 277 struct bridge_mcast_querier ip4_querier; 278 #if IS_ENABLED(CONFIG_IPV6) 279 struct bridge_mcast_other_query ip6_other_query; 280 struct bridge_mcast_own_query ip6_own_query; 281 struct bridge_mcast_querier ip6_querier; 282 #endif /* IS_ENABLED(CONFIG_IPV6) */ 283 #endif 284 285 struct timer_list hello_timer; 286 struct timer_list tcn_timer; 287 struct timer_list topology_change_timer; 288 struct timer_list gc_timer; 289 struct kobject *ifobj; 290 u32 auto_cnt; 291 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 292 u8 vlan_enabled; 293 __be16 vlan_proto; 294 u16 default_pvid; 295 struct net_port_vlans __rcu *vlan_info; 296 #endif 297 }; 298 299 struct br_input_skb_cb { 300 struct net_device *brdev; 301 302 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 303 int igmp; 304 int mrouters_only; 305 #endif 306 307 u16 frag_max_size; 308 309 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 310 bool vlan_filtered; 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 /* called under bridge lock */ 338 static inline int br_is_root_bridge(const struct net_bridge *br) 339 { 340 return !memcmp(&br->bridge_id, &br->designated_root, 8); 341 } 342 343 /* br_device.c */ 344 void br_dev_setup(struct net_device *dev); 345 void br_dev_delete(struct net_device *dev, struct list_head *list); 346 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 347 #ifdef CONFIG_NET_POLL_CONTROLLER 348 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 349 struct sk_buff *skb) 350 { 351 struct netpoll *np = p->np; 352 353 if (np) 354 netpoll_send_skb(np, skb); 355 } 356 357 int br_netpoll_enable(struct net_bridge_port *p); 358 void br_netpoll_disable(struct net_bridge_port *p); 359 #else 360 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 361 struct sk_buff *skb) 362 { 363 } 364 365 static inline int br_netpoll_enable(struct net_bridge_port *p) 366 { 367 return 0; 368 } 369 370 static inline void br_netpoll_disable(struct net_bridge_port *p) 371 { 372 } 373 #endif 374 375 /* br_fdb.c */ 376 int br_fdb_init(void); 377 void br_fdb_fini(void); 378 void br_fdb_flush(struct net_bridge *br); 379 void br_fdb_find_delete_local(struct net_bridge *br, 380 const struct net_bridge_port *p, 381 const unsigned char *addr, u16 vid); 382 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 383 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 384 void br_fdb_cleanup(unsigned long arg); 385 void br_fdb_delete_by_port(struct net_bridge *br, 386 const struct net_bridge_port *p, int do_all); 387 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 388 const unsigned char *addr, __u16 vid); 389 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 390 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 391 unsigned long off); 392 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 393 const unsigned char *addr, u16 vid); 394 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 395 const unsigned char *addr, u16 vid, bool added_by_user); 396 397 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 398 struct net_device *dev, const unsigned char *addr, u16 vid); 399 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 400 const unsigned char *addr, u16 vid, u16 nlh_flags); 401 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 402 struct net_device *dev, struct net_device *fdev, int idx); 403 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 404 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 405 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 406 const unsigned char *addr, u16 vid); 407 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 408 const unsigned char *addr, u16 vid); 409 410 /* br_forward.c */ 411 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 412 int br_dev_queue_push_xmit(struct sk_buff *skb); 413 void br_forward(const struct net_bridge_port *to, 414 struct sk_buff *skb, struct sk_buff *skb0); 415 int br_forward_finish(struct sk_buff *skb); 416 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 417 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 418 struct sk_buff *skb2, bool unicast); 419 420 /* br_if.c */ 421 void br_port_carrier_check(struct net_bridge_port *p); 422 int br_add_bridge(struct net *net, const char *name); 423 int br_del_bridge(struct net *net, const char *name); 424 int br_add_if(struct net_bridge *br, struct net_device *dev); 425 int br_del_if(struct net_bridge *br, struct net_device *dev); 426 int br_min_mtu(const struct net_bridge *br); 427 netdev_features_t br_features_recompute(struct net_bridge *br, 428 netdev_features_t features); 429 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 430 void br_manage_promisc(struct net_bridge *br); 431 432 /* br_input.c */ 433 int br_handle_frame_finish(struct sk_buff *skb); 434 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 435 436 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 437 { 438 return rcu_dereference(dev->rx_handler) == br_handle_frame; 439 } 440 441 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 442 { 443 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 444 } 445 446 /* br_ioctl.c */ 447 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 448 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 449 void __user *arg); 450 451 /* br_multicast.c */ 452 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 453 extern unsigned int br_mdb_rehash_seq; 454 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 455 struct sk_buff *skb, u16 vid); 456 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 457 struct sk_buff *skb, u16 vid); 458 void br_multicast_add_port(struct net_bridge_port *port); 459 void br_multicast_del_port(struct net_bridge_port *port); 460 void br_multicast_enable_port(struct net_bridge_port *port); 461 void br_multicast_disable_port(struct net_bridge_port *port); 462 void br_multicast_init(struct net_bridge *br); 463 void br_multicast_open(struct net_bridge *br); 464 void br_multicast_stop(struct net_bridge *br); 465 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 466 struct sk_buff *skb); 467 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 468 struct sk_buff *skb, struct sk_buff *skb2); 469 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 470 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 471 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 472 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 473 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 474 struct net_bridge_mdb_entry * 475 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 476 struct net_bridge_mdb_entry * 477 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 478 struct br_ip *group); 479 void br_multicast_free_pg(struct rcu_head *head); 480 struct net_bridge_port_group * 481 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 482 struct net_bridge_port_group __rcu *next, 483 unsigned char state); 484 void br_mdb_init(void); 485 void br_mdb_uninit(void); 486 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 487 struct br_ip *group, int type); 488 489 #define mlock_dereference(X, br) \ 490 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 491 492 static inline bool br_multicast_is_router(struct net_bridge *br) 493 { 494 return br->multicast_router == 2 || 495 (br->multicast_router == 1 && 496 timer_pending(&br->multicast_router_timer)); 497 } 498 499 static inline bool 500 __br_multicast_querier_exists(struct net_bridge *br, 501 struct bridge_mcast_other_query *querier) 502 { 503 return time_is_before_jiffies(querier->delay_time) && 504 (br->multicast_querier || timer_pending(&querier->timer)); 505 } 506 507 static inline bool br_multicast_querier_exists(struct net_bridge *br, 508 struct ethhdr *eth) 509 { 510 switch (eth->h_proto) { 511 case (htons(ETH_P_IP)): 512 return __br_multicast_querier_exists(br, &br->ip4_other_query); 513 #if IS_ENABLED(CONFIG_IPV6) 514 case (htons(ETH_P_IPV6)): 515 return __br_multicast_querier_exists(br, &br->ip6_other_query); 516 #endif 517 default: 518 return false; 519 } 520 } 521 #else 522 static inline int br_multicast_rcv(struct net_bridge *br, 523 struct net_bridge_port *port, 524 struct sk_buff *skb, 525 u16 vid) 526 { 527 return 0; 528 } 529 530 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 531 struct sk_buff *skb, u16 vid) 532 { 533 return NULL; 534 } 535 536 static inline void br_multicast_add_port(struct net_bridge_port *port) 537 { 538 } 539 540 static inline void br_multicast_del_port(struct net_bridge_port *port) 541 { 542 } 543 544 static inline void br_multicast_enable_port(struct net_bridge_port *port) 545 { 546 } 547 548 static inline void br_multicast_disable_port(struct net_bridge_port *port) 549 { 550 } 551 552 static inline void br_multicast_init(struct net_bridge *br) 553 { 554 } 555 556 static inline void br_multicast_open(struct net_bridge *br) 557 { 558 } 559 560 static inline void br_multicast_stop(struct net_bridge *br) 561 { 562 } 563 564 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 565 struct sk_buff *skb) 566 { 567 } 568 569 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 570 struct sk_buff *skb, 571 struct sk_buff *skb2) 572 { 573 } 574 static inline bool br_multicast_is_router(struct net_bridge *br) 575 { 576 return 0; 577 } 578 static inline bool br_multicast_querier_exists(struct net_bridge *br, 579 struct ethhdr *eth) 580 { 581 return false; 582 } 583 static inline void br_mdb_init(void) 584 { 585 } 586 static inline void br_mdb_uninit(void) 587 { 588 } 589 #endif 590 591 /* br_vlan.c */ 592 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 593 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 594 struct sk_buff *skb, u16 *vid); 595 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 596 const struct sk_buff *skb); 597 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 598 struct sk_buff *br_handle_vlan(struct net_bridge *br, 599 const struct net_port_vlans *v, 600 struct sk_buff *skb); 601 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 602 int br_vlan_delete(struct net_bridge *br, u16 vid); 603 void br_vlan_flush(struct net_bridge *br); 604 bool br_vlan_find(struct net_bridge *br, u16 vid); 605 void br_recalculate_fwd_mask(struct net_bridge *br); 606 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 607 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 608 int br_vlan_init(struct net_bridge *br); 609 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 610 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 611 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 612 void nbp_vlan_flush(struct net_bridge_port *port); 613 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 614 int nbp_vlan_init(struct net_bridge_port *port); 615 616 static inline struct net_port_vlans *br_get_vlan_info( 617 const struct net_bridge *br) 618 { 619 return rcu_dereference_rtnl(br->vlan_info); 620 } 621 622 static inline struct net_port_vlans *nbp_get_vlan_info( 623 const struct net_bridge_port *p) 624 { 625 return rcu_dereference_rtnl(p->vlan_info); 626 } 627 628 /* Since bridge now depends on 8021Q module, but the time bridge sees the 629 * skb, the vlan tag will always be present if the frame was tagged. 630 */ 631 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 632 { 633 int err = 0; 634 635 if (skb_vlan_tag_present(skb)) 636 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 637 else { 638 *vid = 0; 639 err = -EINVAL; 640 } 641 642 return err; 643 } 644 645 static inline u16 br_get_pvid(const struct net_port_vlans *v) 646 { 647 if (!v) 648 return 0; 649 650 smp_rmb(); 651 return v->pvid; 652 } 653 654 static inline int br_vlan_enabled(struct net_bridge *br) 655 { 656 return br->vlan_enabled; 657 } 658 #else 659 static inline bool br_allowed_ingress(struct net_bridge *br, 660 struct net_port_vlans *v, 661 struct sk_buff *skb, 662 u16 *vid) 663 { 664 return true; 665 } 666 667 static inline bool br_allowed_egress(struct net_bridge *br, 668 const struct net_port_vlans *v, 669 const struct sk_buff *skb) 670 { 671 return true; 672 } 673 674 static inline bool br_should_learn(struct net_bridge_port *p, 675 struct sk_buff *skb, u16 *vid) 676 { 677 return true; 678 } 679 680 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 681 const struct net_port_vlans *v, 682 struct sk_buff *skb) 683 { 684 return skb; 685 } 686 687 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 688 { 689 return -EOPNOTSUPP; 690 } 691 692 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 693 { 694 return -EOPNOTSUPP; 695 } 696 697 static inline void br_vlan_flush(struct net_bridge *br) 698 { 699 } 700 701 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 702 { 703 return false; 704 } 705 706 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 707 { 708 } 709 710 static inline int br_vlan_init(struct net_bridge *br) 711 { 712 return 0; 713 } 714 715 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 716 { 717 return -EOPNOTSUPP; 718 } 719 720 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 721 { 722 return -EOPNOTSUPP; 723 } 724 725 static inline void nbp_vlan_flush(struct net_bridge_port *port) 726 { 727 } 728 729 static inline struct net_port_vlans *br_get_vlan_info( 730 const struct net_bridge *br) 731 { 732 return NULL; 733 } 734 static inline struct net_port_vlans *nbp_get_vlan_info( 735 const struct net_bridge_port *p) 736 { 737 return NULL; 738 } 739 740 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 741 { 742 return false; 743 } 744 745 static inline int nbp_vlan_init(struct net_bridge_port *port) 746 { 747 return 0; 748 } 749 750 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 751 { 752 return 0; 753 } 754 static inline u16 br_get_pvid(const struct net_port_vlans *v) 755 { 756 return 0; 757 } 758 759 static inline int br_vlan_enabled(struct net_bridge *br) 760 { 761 return 0; 762 } 763 #endif 764 765 /* br_netfilter.c */ 766 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 767 int br_nf_core_init(void); 768 void br_nf_core_fini(void); 769 void br_netfilter_rtable_init(struct net_bridge *); 770 #else 771 static inline int br_nf_core_init(void) { return 0; } 772 static inline void br_nf_core_fini(void) {} 773 #define br_netfilter_rtable_init(x) 774 #endif 775 776 /* br_stp.c */ 777 void br_log_state(const struct net_bridge_port *p); 778 void br_set_state(struct net_bridge_port *p, unsigned int state); 779 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 780 void br_init_port(struct net_bridge_port *p); 781 void br_become_designated_port(struct net_bridge_port *p); 782 783 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 784 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 785 int br_set_hello_time(struct net_bridge *br, unsigned long x); 786 int br_set_max_age(struct net_bridge *br, unsigned long x); 787 788 789 /* br_stp_if.c */ 790 void br_stp_enable_bridge(struct net_bridge *br); 791 void br_stp_disable_bridge(struct net_bridge *br); 792 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 793 void br_stp_enable_port(struct net_bridge_port *p); 794 void br_stp_disable_port(struct net_bridge_port *p); 795 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 796 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 797 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 798 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 799 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 800 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 801 802 /* br_stp_bpdu.c */ 803 struct stp_proto; 804 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 805 struct net_device *dev); 806 807 /* br_stp_timer.c */ 808 void br_stp_timer_init(struct net_bridge *br); 809 void br_stp_port_timer_init(struct net_bridge_port *p); 810 unsigned long br_timer_value(const struct timer_list *timer); 811 812 /* br.c */ 813 #if IS_ENABLED(CONFIG_ATM_LANE) 814 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 815 #endif 816 817 /* br_netlink.c */ 818 extern struct rtnl_link_ops br_link_ops; 819 int br_netlink_init(void); 820 void br_netlink_fini(void); 821 void br_ifinfo_notify(int event, struct net_bridge_port *port); 822 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 823 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 824 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 825 u32 filter_mask); 826 827 #ifdef CONFIG_SYSFS 828 /* br_sysfs_if.c */ 829 extern const struct sysfs_ops brport_sysfs_ops; 830 int br_sysfs_addif(struct net_bridge_port *p); 831 int br_sysfs_renameif(struct net_bridge_port *p); 832 833 /* br_sysfs_br.c */ 834 int br_sysfs_addbr(struct net_device *dev); 835 void br_sysfs_delbr(struct net_device *dev); 836 837 #else 838 839 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 840 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 841 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 842 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 843 #endif /* CONFIG_SYSFS */ 844 845 #endif 846