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 bool proxyarp_replied; 309 310 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 311 bool vlan_filtered; 312 #endif 313 }; 314 315 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 316 317 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 318 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 319 #else 320 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 321 #endif 322 323 #define br_printk(level, br, format, args...) \ 324 printk(level "%s: " format, (br)->dev->name, ##args) 325 326 #define br_err(__br, format, args...) \ 327 br_printk(KERN_ERR, __br, format, ##args) 328 #define br_warn(__br, format, args...) \ 329 br_printk(KERN_WARNING, __br, format, ##args) 330 #define br_notice(__br, format, args...) \ 331 br_printk(KERN_NOTICE, __br, format, ##args) 332 #define br_info(__br, format, args...) \ 333 br_printk(KERN_INFO, __br, format, ##args) 334 335 #define br_debug(br, format, args...) \ 336 pr_debug("%s: " format, (br)->dev->name, ##args) 337 338 /* called under bridge lock */ 339 static inline int br_is_root_bridge(const struct net_bridge *br) 340 { 341 return !memcmp(&br->bridge_id, &br->designated_root, 8); 342 } 343 344 /* br_device.c */ 345 void br_dev_setup(struct net_device *dev); 346 void br_dev_delete(struct net_device *dev, struct list_head *list); 347 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 348 #ifdef CONFIG_NET_POLL_CONTROLLER 349 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 350 struct sk_buff *skb) 351 { 352 struct netpoll *np = p->np; 353 354 if (np) 355 netpoll_send_skb(np, skb); 356 } 357 358 int br_netpoll_enable(struct net_bridge_port *p); 359 void br_netpoll_disable(struct net_bridge_port *p); 360 #else 361 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 362 struct sk_buff *skb) 363 { 364 } 365 366 static inline int br_netpoll_enable(struct net_bridge_port *p) 367 { 368 return 0; 369 } 370 371 static inline void br_netpoll_disable(struct net_bridge_port *p) 372 { 373 } 374 #endif 375 376 /* br_fdb.c */ 377 int br_fdb_init(void); 378 void br_fdb_fini(void); 379 void br_fdb_flush(struct net_bridge *br); 380 void br_fdb_find_delete_local(struct net_bridge *br, 381 const struct net_bridge_port *p, 382 const unsigned char *addr, u16 vid); 383 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 384 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 385 void br_fdb_cleanup(unsigned long arg); 386 void br_fdb_delete_by_port(struct net_bridge *br, 387 const struct net_bridge_port *p, int do_all); 388 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 389 const unsigned char *addr, __u16 vid); 390 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 391 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 392 unsigned long off); 393 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 394 const unsigned char *addr, u16 vid); 395 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 396 const unsigned char *addr, u16 vid, bool added_by_user); 397 398 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 399 struct net_device *dev, const unsigned char *addr, u16 vid); 400 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 401 const unsigned char *addr, u16 vid, u16 nlh_flags); 402 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 403 struct net_device *dev, struct net_device *fdev, int idx); 404 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 405 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 406 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 407 const unsigned char *addr, u16 vid); 408 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 409 const unsigned char *addr, u16 vid); 410 411 /* br_forward.c */ 412 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 413 int br_dev_queue_push_xmit(struct sk_buff *skb); 414 void br_forward(const struct net_bridge_port *to, 415 struct sk_buff *skb, struct sk_buff *skb0); 416 int br_forward_finish(struct sk_buff *skb); 417 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 418 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 419 struct sk_buff *skb2, bool unicast); 420 421 /* br_if.c */ 422 void br_port_carrier_check(struct net_bridge_port *p); 423 int br_add_bridge(struct net *net, const char *name); 424 int br_del_bridge(struct net *net, const char *name); 425 int br_add_if(struct net_bridge *br, struct net_device *dev); 426 int br_del_if(struct net_bridge *br, struct net_device *dev); 427 int br_min_mtu(const struct net_bridge *br); 428 netdev_features_t br_features_recompute(struct net_bridge *br, 429 netdev_features_t features); 430 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 431 void br_manage_promisc(struct net_bridge *br); 432 433 /* br_input.c */ 434 int br_handle_frame_finish(struct sk_buff *skb); 435 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 436 437 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 438 { 439 return rcu_dereference(dev->rx_handler) == br_handle_frame; 440 } 441 442 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 443 { 444 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 445 } 446 447 /* br_ioctl.c */ 448 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 449 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 450 void __user *arg); 451 452 /* br_multicast.c */ 453 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 454 extern unsigned int br_mdb_rehash_seq; 455 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 456 struct sk_buff *skb, u16 vid); 457 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 458 struct sk_buff *skb, u16 vid); 459 void br_multicast_add_port(struct net_bridge_port *port); 460 void br_multicast_del_port(struct net_bridge_port *port); 461 void br_multicast_enable_port(struct net_bridge_port *port); 462 void br_multicast_disable_port(struct net_bridge_port *port); 463 void br_multicast_init(struct net_bridge *br); 464 void br_multicast_open(struct net_bridge *br); 465 void br_multicast_stop(struct net_bridge *br); 466 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 467 struct sk_buff *skb); 468 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 469 struct sk_buff *skb, struct sk_buff *skb2); 470 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 471 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 472 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 473 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 474 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 475 struct net_bridge_mdb_entry * 476 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 477 struct net_bridge_mdb_entry * 478 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 479 struct br_ip *group); 480 void br_multicast_free_pg(struct rcu_head *head); 481 struct net_bridge_port_group * 482 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 483 struct net_bridge_port_group __rcu *next, 484 unsigned char state); 485 void br_mdb_init(void); 486 void br_mdb_uninit(void); 487 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 488 struct br_ip *group, int type); 489 490 #define mlock_dereference(X, br) \ 491 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 492 493 static inline bool br_multicast_is_router(struct net_bridge *br) 494 { 495 return br->multicast_router == 2 || 496 (br->multicast_router == 1 && 497 timer_pending(&br->multicast_router_timer)); 498 } 499 500 static inline bool 501 __br_multicast_querier_exists(struct net_bridge *br, 502 struct bridge_mcast_other_query *querier) 503 { 504 return time_is_before_jiffies(querier->delay_time) && 505 (br->multicast_querier || timer_pending(&querier->timer)); 506 } 507 508 static inline bool br_multicast_querier_exists(struct net_bridge *br, 509 struct ethhdr *eth) 510 { 511 switch (eth->h_proto) { 512 case (htons(ETH_P_IP)): 513 return __br_multicast_querier_exists(br, &br->ip4_other_query); 514 #if IS_ENABLED(CONFIG_IPV6) 515 case (htons(ETH_P_IPV6)): 516 return __br_multicast_querier_exists(br, &br->ip6_other_query); 517 #endif 518 default: 519 return false; 520 } 521 } 522 #else 523 static inline int br_multicast_rcv(struct net_bridge *br, 524 struct net_bridge_port *port, 525 struct sk_buff *skb, 526 u16 vid) 527 { 528 return 0; 529 } 530 531 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 532 struct sk_buff *skb, u16 vid) 533 { 534 return NULL; 535 } 536 537 static inline void br_multicast_add_port(struct net_bridge_port *port) 538 { 539 } 540 541 static inline void br_multicast_del_port(struct net_bridge_port *port) 542 { 543 } 544 545 static inline void br_multicast_enable_port(struct net_bridge_port *port) 546 { 547 } 548 549 static inline void br_multicast_disable_port(struct net_bridge_port *port) 550 { 551 } 552 553 static inline void br_multicast_init(struct net_bridge *br) 554 { 555 } 556 557 static inline void br_multicast_open(struct net_bridge *br) 558 { 559 } 560 561 static inline void br_multicast_stop(struct net_bridge *br) 562 { 563 } 564 565 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 566 struct sk_buff *skb) 567 { 568 } 569 570 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 571 struct sk_buff *skb, 572 struct sk_buff *skb2) 573 { 574 } 575 static inline bool br_multicast_is_router(struct net_bridge *br) 576 { 577 return 0; 578 } 579 static inline bool br_multicast_querier_exists(struct net_bridge *br, 580 struct ethhdr *eth) 581 { 582 return false; 583 } 584 static inline void br_mdb_init(void) 585 { 586 } 587 static inline void br_mdb_uninit(void) 588 { 589 } 590 #endif 591 592 /* br_vlan.c */ 593 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 594 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 595 struct sk_buff *skb, u16 *vid); 596 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 597 const struct sk_buff *skb); 598 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 599 struct sk_buff *br_handle_vlan(struct net_bridge *br, 600 const struct net_port_vlans *v, 601 struct sk_buff *skb); 602 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 603 int br_vlan_delete(struct net_bridge *br, u16 vid); 604 void br_vlan_flush(struct net_bridge *br); 605 bool br_vlan_find(struct net_bridge *br, u16 vid); 606 void br_recalculate_fwd_mask(struct net_bridge *br); 607 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 608 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 609 int br_vlan_init(struct net_bridge *br); 610 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 611 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 612 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 613 void nbp_vlan_flush(struct net_bridge_port *port); 614 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 615 int nbp_vlan_init(struct net_bridge_port *port); 616 617 static inline struct net_port_vlans *br_get_vlan_info( 618 const struct net_bridge *br) 619 { 620 return rcu_dereference_rtnl(br->vlan_info); 621 } 622 623 static inline struct net_port_vlans *nbp_get_vlan_info( 624 const struct net_bridge_port *p) 625 { 626 return rcu_dereference_rtnl(p->vlan_info); 627 } 628 629 /* Since bridge now depends on 8021Q module, but the time bridge sees the 630 * skb, the vlan tag will always be present if the frame was tagged. 631 */ 632 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 633 { 634 int err = 0; 635 636 if (skb_vlan_tag_present(skb)) 637 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 638 else { 639 *vid = 0; 640 err = -EINVAL; 641 } 642 643 return err; 644 } 645 646 static inline u16 br_get_pvid(const struct net_port_vlans *v) 647 { 648 if (!v) 649 return 0; 650 651 smp_rmb(); 652 return v->pvid; 653 } 654 655 static inline int br_vlan_enabled(struct net_bridge *br) 656 { 657 return br->vlan_enabled; 658 } 659 #else 660 static inline bool br_allowed_ingress(struct net_bridge *br, 661 struct net_port_vlans *v, 662 struct sk_buff *skb, 663 u16 *vid) 664 { 665 return true; 666 } 667 668 static inline bool br_allowed_egress(struct net_bridge *br, 669 const struct net_port_vlans *v, 670 const struct sk_buff *skb) 671 { 672 return true; 673 } 674 675 static inline bool br_should_learn(struct net_bridge_port *p, 676 struct sk_buff *skb, u16 *vid) 677 { 678 return true; 679 } 680 681 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 682 const struct net_port_vlans *v, 683 struct sk_buff *skb) 684 { 685 return skb; 686 } 687 688 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 689 { 690 return -EOPNOTSUPP; 691 } 692 693 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 694 { 695 return -EOPNOTSUPP; 696 } 697 698 static inline void br_vlan_flush(struct net_bridge *br) 699 { 700 } 701 702 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 703 { 704 return false; 705 } 706 707 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 708 { 709 } 710 711 static inline int br_vlan_init(struct net_bridge *br) 712 { 713 return 0; 714 } 715 716 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 717 { 718 return -EOPNOTSUPP; 719 } 720 721 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 722 { 723 return -EOPNOTSUPP; 724 } 725 726 static inline void nbp_vlan_flush(struct net_bridge_port *port) 727 { 728 } 729 730 static inline struct net_port_vlans *br_get_vlan_info( 731 const struct net_bridge *br) 732 { 733 return NULL; 734 } 735 static inline struct net_port_vlans *nbp_get_vlan_info( 736 const struct net_bridge_port *p) 737 { 738 return NULL; 739 } 740 741 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 742 { 743 return false; 744 } 745 746 static inline int nbp_vlan_init(struct net_bridge_port *port) 747 { 748 return 0; 749 } 750 751 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 752 { 753 return 0; 754 } 755 static inline u16 br_get_pvid(const struct net_port_vlans *v) 756 { 757 return 0; 758 } 759 760 static inline int br_vlan_enabled(struct net_bridge *br) 761 { 762 return 0; 763 } 764 #endif 765 766 /* br_netfilter.c */ 767 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 768 int br_nf_prerouting_finish_bridge(struct sk_buff *skb); 769 int br_nf_core_init(void); 770 void br_nf_core_fini(void); 771 void br_netfilter_rtable_init(struct net_bridge *); 772 #else 773 static inline int br_nf_prerouting_finish_bridge(struct sk_buff *skb) 774 { 775 return 0; 776 } 777 static inline int br_nf_core_init(void) { return 0; } 778 static inline void br_nf_core_fini(void) {} 779 #define br_netfilter_rtable_init(x) 780 #endif 781 782 /* br_stp.c */ 783 void br_log_state(const struct net_bridge_port *p); 784 void br_set_state(struct net_bridge_port *p, unsigned int state); 785 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 786 void br_init_port(struct net_bridge_port *p); 787 void br_become_designated_port(struct net_bridge_port *p); 788 789 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 790 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 791 int br_set_hello_time(struct net_bridge *br, unsigned long x); 792 int br_set_max_age(struct net_bridge *br, unsigned long x); 793 794 795 /* br_stp_if.c */ 796 void br_stp_enable_bridge(struct net_bridge *br); 797 void br_stp_disable_bridge(struct net_bridge *br); 798 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 799 void br_stp_enable_port(struct net_bridge_port *p); 800 void br_stp_disable_port(struct net_bridge_port *p); 801 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 802 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 803 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 804 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 805 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 806 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 807 808 /* br_stp_bpdu.c */ 809 struct stp_proto; 810 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 811 struct net_device *dev); 812 813 /* br_stp_timer.c */ 814 void br_stp_timer_init(struct net_bridge *br); 815 void br_stp_port_timer_init(struct net_bridge_port *p); 816 unsigned long br_timer_value(const struct timer_list *timer); 817 818 /* br.c */ 819 #if IS_ENABLED(CONFIG_ATM_LANE) 820 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 821 #endif 822 823 /* br_netlink.c */ 824 extern struct rtnl_link_ops br_link_ops; 825 int br_netlink_init(void); 826 void br_netlink_fini(void); 827 void br_ifinfo_notify(int event, struct net_bridge_port *port); 828 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 829 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 830 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 831 u32 filter_mask); 832 833 #ifdef CONFIG_SYSFS 834 /* br_sysfs_if.c */ 835 extern const struct sysfs_ops brport_sysfs_ops; 836 int br_sysfs_addif(struct net_bridge_port *p); 837 int br_sysfs_renameif(struct net_bridge_port *p); 838 839 /* br_sysfs_br.c */ 840 int br_sysfs_addbr(struct net_device *dev); 841 void br_sysfs_delbr(struct net_device *dev); 842 843 #else 844 845 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 846 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 847 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 848 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 849 #endif /* CONFIG_SYSFS */ 850 851 #endif 852