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; 102 unsigned char is_static; 103 unsigned char added_by_user; 104 __u16 vlan_id; 105 }; 106 107 struct net_bridge_port_group { 108 struct net_bridge_port *port; 109 struct net_bridge_port_group __rcu *next; 110 struct hlist_node mglist; 111 struct rcu_head rcu; 112 struct timer_list timer; 113 struct br_ip addr; 114 unsigned char state; 115 }; 116 117 struct net_bridge_mdb_entry 118 { 119 struct hlist_node hlist[2]; 120 struct net_bridge *br; 121 struct net_bridge_port_group __rcu *ports; 122 struct rcu_head rcu; 123 struct timer_list timer; 124 struct br_ip addr; 125 bool mglist; 126 }; 127 128 struct net_bridge_mdb_htable 129 { 130 struct hlist_head *mhash; 131 struct rcu_head rcu; 132 struct net_bridge_mdb_htable *old; 133 u32 size; 134 u32 max; 135 u32 secret; 136 u32 ver; 137 }; 138 139 struct net_bridge_port 140 { 141 struct net_bridge *br; 142 struct net_device *dev; 143 struct list_head list; 144 145 /* STP */ 146 u8 priority; 147 u8 state; 148 u16 port_no; 149 unsigned char topology_change_ack; 150 unsigned char config_pending; 151 port_id port_id; 152 port_id designated_port; 153 bridge_id designated_root; 154 bridge_id designated_bridge; 155 u32 path_cost; 156 u32 designated_cost; 157 unsigned long designated_age; 158 159 struct timer_list forward_delay_timer; 160 struct timer_list hold_timer; 161 struct timer_list message_age_timer; 162 struct kobject kobj; 163 struct rcu_head rcu; 164 165 unsigned long flags; 166 #define BR_HAIRPIN_MODE 0x00000001 167 #define BR_BPDU_GUARD 0x00000002 168 #define BR_ROOT_BLOCK 0x00000004 169 #define BR_MULTICAST_FAST_LEAVE 0x00000008 170 #define BR_ADMIN_COST 0x00000010 171 #define BR_LEARNING 0x00000020 172 #define BR_FLOOD 0x00000040 173 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 174 #define BR_PROMISC 0x00000080 175 176 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 177 struct bridge_mcast_own_query ip4_own_query; 178 #if IS_ENABLED(CONFIG_IPV6) 179 struct bridge_mcast_own_query ip6_own_query; 180 #endif /* IS_ENABLED(CONFIG_IPV6) */ 181 unsigned char multicast_router; 182 struct timer_list multicast_router_timer; 183 struct hlist_head mglist; 184 struct hlist_node rlist; 185 #endif 186 187 #ifdef CONFIG_SYSFS 188 char sysfs_name[IFNAMSIZ]; 189 #endif 190 191 #ifdef CONFIG_NET_POLL_CONTROLLER 192 struct netpoll *np; 193 #endif 194 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 195 struct net_port_vlans __rcu *vlan_info; 196 #endif 197 }; 198 199 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 200 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 201 202 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 203 204 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 205 { 206 return rcu_dereference(dev->rx_handler_data); 207 } 208 209 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 210 { 211 return br_port_exists(dev) ? 212 rtnl_dereference(dev->rx_handler_data) : NULL; 213 } 214 215 struct net_bridge 216 { 217 spinlock_t lock; 218 struct list_head port_list; 219 struct net_device *dev; 220 221 struct pcpu_sw_netstats __percpu *stats; 222 spinlock_t hash_lock; 223 struct hlist_head hash[BR_HASH_SIZE]; 224 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 225 struct rtable fake_rtable; 226 bool nf_call_iptables; 227 bool nf_call_ip6tables; 228 bool nf_call_arptables; 229 #endif 230 u16 group_fwd_mask; 231 u16 group_fwd_mask_required; 232 233 /* STP */ 234 bridge_id designated_root; 235 bridge_id bridge_id; 236 u32 root_path_cost; 237 unsigned long max_age; 238 unsigned long hello_time; 239 unsigned long forward_delay; 240 unsigned long bridge_max_age; 241 unsigned long ageing_time; 242 unsigned long bridge_hello_time; 243 unsigned long bridge_forward_delay; 244 245 u8 group_addr[ETH_ALEN]; 246 bool group_addr_set; 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_other_query ip4_other_query; 284 struct bridge_mcast_own_query ip4_own_query; 285 struct bridge_mcast_querier ip4_querier; 286 #if IS_ENABLED(CONFIG_IPV6) 287 struct bridge_mcast_other_query ip6_other_query; 288 struct bridge_mcast_own_query ip6_own_query; 289 struct bridge_mcast_querier ip6_querier; 290 #endif /* IS_ENABLED(CONFIG_IPV6) */ 291 #endif 292 293 struct timer_list hello_timer; 294 struct timer_list tcn_timer; 295 struct timer_list topology_change_timer; 296 struct timer_list gc_timer; 297 struct kobject *ifobj; 298 u32 auto_cnt; 299 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 300 u8 vlan_enabled; 301 __be16 vlan_proto; 302 struct net_port_vlans __rcu *vlan_info; 303 #endif 304 }; 305 306 struct br_input_skb_cb { 307 struct net_device *brdev; 308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 309 int igmp; 310 int mrouters_only; 311 #endif 312 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 313 bool vlan_filtered; 314 #endif 315 }; 316 317 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 318 319 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 320 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 321 #else 322 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 323 #endif 324 325 #define br_printk(level, br, format, args...) \ 326 printk(level "%s: " format, (br)->dev->name, ##args) 327 328 #define br_err(__br, format, args...) \ 329 br_printk(KERN_ERR, __br, format, ##args) 330 #define br_warn(__br, format, args...) \ 331 br_printk(KERN_WARNING, __br, format, ##args) 332 #define br_notice(__br, format, args...) \ 333 br_printk(KERN_NOTICE, __br, format, ##args) 334 #define br_info(__br, format, args...) \ 335 br_printk(KERN_INFO, __br, format, ##args) 336 337 #define br_debug(br, format, args...) \ 338 pr_debug("%s: " format, (br)->dev->name, ##args) 339 340 /* called under bridge lock */ 341 static inline int br_is_root_bridge(const struct net_bridge *br) 342 { 343 return !memcmp(&br->bridge_id, &br->designated_root, 8); 344 } 345 346 /* br_device.c */ 347 void br_dev_setup(struct net_device *dev); 348 void br_dev_delete(struct net_device *dev, struct list_head *list); 349 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 350 #ifdef CONFIG_NET_POLL_CONTROLLER 351 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 352 struct sk_buff *skb) 353 { 354 struct netpoll *np = p->np; 355 356 if (np) 357 netpoll_send_skb(np, skb); 358 } 359 360 int br_netpoll_enable(struct net_bridge_port *p); 361 void br_netpoll_disable(struct net_bridge_port *p); 362 #else 363 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 364 struct sk_buff *skb) 365 { 366 } 367 368 static inline int br_netpoll_enable(struct net_bridge_port *p) 369 { 370 return 0; 371 } 372 373 static inline void br_netpoll_disable(struct net_bridge_port *p) 374 { 375 } 376 #endif 377 378 /* br_fdb.c */ 379 int br_fdb_init(void); 380 void br_fdb_fini(void); 381 void br_fdb_flush(struct net_bridge *br); 382 void br_fdb_find_delete_local(struct net_bridge *br, 383 const struct net_bridge_port *p, 384 const unsigned char *addr, u16 vid); 385 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 386 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 387 void br_fdb_cleanup(unsigned long arg); 388 void br_fdb_delete_by_port(struct net_bridge *br, 389 const struct net_bridge_port *p, int do_all); 390 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 391 const unsigned char *addr, __u16 vid); 392 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 393 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 394 unsigned long off); 395 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 396 const unsigned char *addr, u16 vid); 397 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 398 const unsigned char *addr, u16 vid, bool added_by_user); 399 400 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 401 struct net_device *dev, const unsigned char *addr); 402 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 403 const unsigned char *addr, u16 nlh_flags); 404 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 405 struct net_device *dev, struct net_device *fdev, int idx); 406 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 407 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 408 409 /* br_forward.c */ 410 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 411 int br_dev_queue_push_xmit(struct sk_buff *skb); 412 void br_forward(const struct net_bridge_port *to, 413 struct sk_buff *skb, struct sk_buff *skb0); 414 int br_forward_finish(struct sk_buff *skb); 415 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 416 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 417 struct sk_buff *skb2, bool unicast); 418 419 /* br_if.c */ 420 void br_port_carrier_check(struct net_bridge_port *p); 421 int br_add_bridge(struct net *net, const char *name); 422 int br_del_bridge(struct net *net, const char *name); 423 int br_add_if(struct net_bridge *br, struct net_device *dev); 424 int br_del_if(struct net_bridge *br, struct net_device *dev); 425 int br_min_mtu(const struct net_bridge *br); 426 netdev_features_t br_features_recompute(struct net_bridge *br, 427 netdev_features_t features); 428 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 429 void br_manage_promisc(struct net_bridge *br); 430 431 /* br_input.c */ 432 int br_handle_frame_finish(struct sk_buff *skb); 433 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 434 435 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 436 { 437 return rcu_dereference(dev->rx_handler) == br_handle_frame; 438 } 439 440 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 441 { 442 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 443 } 444 445 /* br_ioctl.c */ 446 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 447 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 448 void __user *arg); 449 450 /* br_multicast.c */ 451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 452 extern unsigned int br_mdb_rehash_seq; 453 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 454 struct sk_buff *skb, u16 vid); 455 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 456 struct sk_buff *skb, u16 vid); 457 void br_multicast_add_port(struct net_bridge_port *port); 458 void br_multicast_del_port(struct net_bridge_port *port); 459 void br_multicast_enable_port(struct net_bridge_port *port); 460 void br_multicast_disable_port(struct net_bridge_port *port); 461 void br_multicast_init(struct net_bridge *br); 462 void br_multicast_open(struct net_bridge *br); 463 void br_multicast_stop(struct net_bridge *br); 464 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 465 struct sk_buff *skb); 466 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 467 struct sk_buff *skb, struct sk_buff *skb2); 468 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 469 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 470 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 471 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 472 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 473 struct net_bridge_mdb_entry * 474 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 475 struct net_bridge_mdb_entry * 476 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 477 struct br_ip *group); 478 void br_multicast_free_pg(struct rcu_head *head); 479 struct net_bridge_port_group * 480 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 481 struct net_bridge_port_group __rcu *next, 482 unsigned char state); 483 void br_mdb_init(void); 484 void br_mdb_uninit(void); 485 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 486 struct br_ip *group, int type); 487 488 #define mlock_dereference(X, br) \ 489 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 490 491 static inline bool br_multicast_is_router(struct net_bridge *br) 492 { 493 return br->multicast_router == 2 || 494 (br->multicast_router == 1 && 495 timer_pending(&br->multicast_router_timer)); 496 } 497 498 static inline bool 499 __br_multicast_querier_exists(struct net_bridge *br, 500 struct bridge_mcast_other_query *querier) 501 { 502 return time_is_before_jiffies(querier->delay_time) && 503 (br->multicast_querier || timer_pending(&querier->timer)); 504 } 505 506 static inline bool br_multicast_querier_exists(struct net_bridge *br, 507 struct ethhdr *eth) 508 { 509 switch (eth->h_proto) { 510 case (htons(ETH_P_IP)): 511 return __br_multicast_querier_exists(br, &br->ip4_other_query); 512 #if IS_ENABLED(CONFIG_IPV6) 513 case (htons(ETH_P_IPV6)): 514 return __br_multicast_querier_exists(br, &br->ip6_other_query); 515 #endif 516 default: 517 return false; 518 } 519 } 520 #else 521 static inline int br_multicast_rcv(struct net_bridge *br, 522 struct net_bridge_port *port, 523 struct sk_buff *skb, 524 u16 vid) 525 { 526 return 0; 527 } 528 529 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 530 struct sk_buff *skb, u16 vid) 531 { 532 return NULL; 533 } 534 535 static inline void br_multicast_add_port(struct net_bridge_port *port) 536 { 537 } 538 539 static inline void br_multicast_del_port(struct net_bridge_port *port) 540 { 541 } 542 543 static inline void br_multicast_enable_port(struct net_bridge_port *port) 544 { 545 } 546 547 static inline void br_multicast_disable_port(struct net_bridge_port *port) 548 { 549 } 550 551 static inline void br_multicast_init(struct net_bridge *br) 552 { 553 } 554 555 static inline void br_multicast_open(struct net_bridge *br) 556 { 557 } 558 559 static inline void br_multicast_stop(struct net_bridge *br) 560 { 561 } 562 563 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 564 struct sk_buff *skb) 565 { 566 } 567 568 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 569 struct sk_buff *skb, 570 struct sk_buff *skb2) 571 { 572 } 573 static inline bool br_multicast_is_router(struct net_bridge *br) 574 { 575 return 0; 576 } 577 static inline bool br_multicast_querier_exists(struct net_bridge *br, 578 struct ethhdr *eth) 579 { 580 return false; 581 } 582 static inline void br_mdb_init(void) 583 { 584 } 585 static inline void br_mdb_uninit(void) 586 { 587 } 588 #endif 589 590 /* br_vlan.c */ 591 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 592 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 593 struct sk_buff *skb, u16 *vid); 594 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 595 const struct sk_buff *skb); 596 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 597 struct sk_buff *br_handle_vlan(struct net_bridge *br, 598 const struct net_port_vlans *v, 599 struct sk_buff *skb); 600 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 601 int br_vlan_delete(struct net_bridge *br, u16 vid); 602 void br_vlan_flush(struct net_bridge *br); 603 bool br_vlan_find(struct net_bridge *br, u16 vid); 604 void br_recalculate_fwd_mask(struct net_bridge *br); 605 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 606 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 607 void br_vlan_init(struct net_bridge *br); 608 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 609 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 610 void nbp_vlan_flush(struct net_bridge_port *port); 611 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 612 613 static inline struct net_port_vlans *br_get_vlan_info( 614 const struct net_bridge *br) 615 { 616 return rcu_dereference_rtnl(br->vlan_info); 617 } 618 619 static inline struct net_port_vlans *nbp_get_vlan_info( 620 const struct net_bridge_port *p) 621 { 622 return rcu_dereference_rtnl(p->vlan_info); 623 } 624 625 /* Since bridge now depends on 8021Q module, but the time bridge sees the 626 * skb, the vlan tag will always be present if the frame was tagged. 627 */ 628 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 629 { 630 int err = 0; 631 632 if (vlan_tx_tag_present(skb)) 633 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 634 else { 635 *vid = 0; 636 err = -EINVAL; 637 } 638 639 return err; 640 } 641 642 static inline u16 br_get_pvid(const struct net_port_vlans *v) 643 { 644 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 645 * vid wasn't set 646 */ 647 smp_rmb(); 648 return v->pvid ?: VLAN_N_VID; 649 } 650 651 static inline int br_vlan_enabled(struct net_bridge *br) 652 { 653 return br->vlan_enabled; 654 } 655 #else 656 static inline bool br_allowed_ingress(struct net_bridge *br, 657 struct net_port_vlans *v, 658 struct sk_buff *skb, 659 u16 *vid) 660 { 661 return true; 662 } 663 664 static inline bool br_allowed_egress(struct net_bridge *br, 665 const struct net_port_vlans *v, 666 const struct sk_buff *skb) 667 { 668 return true; 669 } 670 671 static inline bool br_should_learn(struct net_bridge_port *p, 672 struct sk_buff *skb, u16 *vid) 673 { 674 return true; 675 } 676 677 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 678 const struct net_port_vlans *v, 679 struct sk_buff *skb) 680 { 681 return skb; 682 } 683 684 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 685 { 686 return -EOPNOTSUPP; 687 } 688 689 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 690 { 691 return -EOPNOTSUPP; 692 } 693 694 static inline void br_vlan_flush(struct net_bridge *br) 695 { 696 } 697 698 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 699 { 700 return false; 701 } 702 703 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 704 { 705 } 706 707 static inline void br_vlan_init(struct net_bridge *br) 708 { 709 } 710 711 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 712 { 713 return -EOPNOTSUPP; 714 } 715 716 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 717 { 718 return -EOPNOTSUPP; 719 } 720 721 static inline void nbp_vlan_flush(struct net_bridge_port *port) 722 { 723 } 724 725 static inline struct net_port_vlans *br_get_vlan_info( 726 const struct net_bridge *br) 727 { 728 return NULL; 729 } 730 static inline struct net_port_vlans *nbp_get_vlan_info( 731 const struct net_bridge_port *p) 732 { 733 return NULL; 734 } 735 736 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 737 { 738 return false; 739 } 740 741 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 742 { 743 return 0; 744 } 745 static inline u16 br_get_pvid(const struct net_port_vlans *v) 746 { 747 return VLAN_N_VID; /* Returns invalid vid */ 748 } 749 750 static inline int br_vlan_enabled(struct net_bridge *br) 751 { 752 return 0; 753 } 754 #endif 755 756 /* br_netfilter.c */ 757 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 758 int br_nf_core_init(void); 759 void br_nf_core_fini(void); 760 void br_netfilter_rtable_init(struct net_bridge *); 761 #else 762 static inline int br_nf_core_init(void) { return 0; } 763 static inline void br_nf_core_fini(void) {} 764 #define br_netfilter_rtable_init(x) 765 #endif 766 767 /* br_stp.c */ 768 void br_log_state(const struct net_bridge_port *p); 769 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 770 void br_init_port(struct net_bridge_port *p); 771 void br_become_designated_port(struct net_bridge_port *p); 772 773 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 774 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 775 int br_set_hello_time(struct net_bridge *br, unsigned long x); 776 int br_set_max_age(struct net_bridge *br, unsigned long x); 777 778 779 /* br_stp_if.c */ 780 void br_stp_enable_bridge(struct net_bridge *br); 781 void br_stp_disable_bridge(struct net_bridge *br); 782 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 783 void br_stp_enable_port(struct net_bridge_port *p); 784 void br_stp_disable_port(struct net_bridge_port *p); 785 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 786 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 787 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 788 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 789 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 790 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 791 792 /* br_stp_bpdu.c */ 793 struct stp_proto; 794 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 795 struct net_device *dev); 796 797 /* br_stp_timer.c */ 798 void br_stp_timer_init(struct net_bridge *br); 799 void br_stp_port_timer_init(struct net_bridge_port *p); 800 unsigned long br_timer_value(const struct timer_list *timer); 801 802 /* br.c */ 803 #if IS_ENABLED(CONFIG_ATM_LANE) 804 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 805 #endif 806 807 /* br_netlink.c */ 808 extern struct rtnl_link_ops br_link_ops; 809 int br_netlink_init(void); 810 void br_netlink_fini(void); 811 void br_ifinfo_notify(int event, struct net_bridge_port *port); 812 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 813 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 814 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 815 u32 filter_mask); 816 817 #ifdef CONFIG_SYSFS 818 /* br_sysfs_if.c */ 819 extern const struct sysfs_ops brport_sysfs_ops; 820 int br_sysfs_addif(struct net_bridge_port *p); 821 int br_sysfs_renameif(struct net_bridge_port *p); 822 823 /* br_sysfs_br.c */ 824 int br_sysfs_addbr(struct net_device *dev); 825 void br_sysfs_delbr(struct net_device *dev); 826 827 #else 828 829 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 830 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 831 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 832 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 833 #endif /* CONFIG_SYSFS */ 834 835 #endif 836