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 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 58 /* our own querier */ 59 struct bridge_mcast_own_query { 60 struct timer_list timer; 61 u32 startup_sent; 62 }; 63 64 /* other querier */ 65 struct bridge_mcast_other_query { 66 struct timer_list timer; 67 unsigned long delay_time; 68 }; 69 70 /* selected querier */ 71 struct bridge_mcast_querier { 72 struct br_ip addr; 73 struct net_bridge_port __rcu *port; 74 }; 75 #endif 76 77 struct net_port_vlans { 78 u16 port_idx; 79 u16 pvid; 80 union { 81 struct net_bridge_port *port; 82 struct net_bridge *br; 83 } parent; 84 struct rcu_head rcu; 85 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 86 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 87 u16 num_vlans; 88 }; 89 90 struct net_bridge_fdb_entry 91 { 92 struct hlist_node hlist; 93 struct net_bridge_port *dst; 94 95 struct rcu_head rcu; 96 unsigned long updated; 97 unsigned long used; 98 mac_addr addr; 99 unsigned char is_local; 100 unsigned char is_static; 101 unsigned char added_by_user; 102 __u16 vlan_id; 103 }; 104 105 struct net_bridge_port_group { 106 struct net_bridge_port *port; 107 struct net_bridge_port_group __rcu *next; 108 struct hlist_node mglist; 109 struct rcu_head rcu; 110 struct timer_list timer; 111 struct br_ip addr; 112 unsigned char state; 113 }; 114 115 struct net_bridge_mdb_entry 116 { 117 struct hlist_node hlist[2]; 118 struct net_bridge *br; 119 struct net_bridge_port_group __rcu *ports; 120 struct rcu_head rcu; 121 struct timer_list timer; 122 struct br_ip addr; 123 bool mglist; 124 }; 125 126 struct net_bridge_mdb_htable 127 { 128 struct hlist_head *mhash; 129 struct rcu_head rcu; 130 struct net_bridge_mdb_htable *old; 131 u32 size; 132 u32 max; 133 u32 secret; 134 u32 ver; 135 }; 136 137 struct net_bridge_port 138 { 139 struct net_bridge *br; 140 struct net_device *dev; 141 struct list_head list; 142 143 /* STP */ 144 u8 priority; 145 u8 state; 146 u16 port_no; 147 unsigned char topology_change_ack; 148 unsigned char config_pending; 149 port_id port_id; 150 port_id designated_port; 151 bridge_id designated_root; 152 bridge_id designated_bridge; 153 u32 path_cost; 154 u32 designated_cost; 155 unsigned long designated_age; 156 157 struct timer_list forward_delay_timer; 158 struct timer_list hold_timer; 159 struct timer_list message_age_timer; 160 struct kobject kobj; 161 struct rcu_head rcu; 162 163 unsigned long flags; 164 #define BR_HAIRPIN_MODE 0x00000001 165 #define BR_BPDU_GUARD 0x00000002 166 #define BR_ROOT_BLOCK 0x00000004 167 #define BR_MULTICAST_FAST_LEAVE 0x00000008 168 #define BR_ADMIN_COST 0x00000010 169 #define BR_LEARNING 0x00000020 170 #define BR_FLOOD 0x00000040 171 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 172 #define BR_PROMISC 0x00000080 173 174 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 175 struct bridge_mcast_own_query ip4_own_query; 176 #if IS_ENABLED(CONFIG_IPV6) 177 struct bridge_mcast_own_query ip6_own_query; 178 #endif /* IS_ENABLED(CONFIG_IPV6) */ 179 unsigned char multicast_router; 180 struct timer_list multicast_router_timer; 181 struct hlist_head mglist; 182 struct hlist_node rlist; 183 #endif 184 185 #ifdef CONFIG_SYSFS 186 char sysfs_name[IFNAMSIZ]; 187 #endif 188 189 #ifdef CONFIG_NET_POLL_CONTROLLER 190 struct netpoll *np; 191 #endif 192 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 193 struct net_port_vlans __rcu *vlan_info; 194 #endif 195 }; 196 197 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 198 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 199 200 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 201 202 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 203 { 204 return rcu_dereference(dev->rx_handler_data); 205 } 206 207 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 208 { 209 return br_port_exists(dev) ? 210 rtnl_dereference(dev->rx_handler_data) : NULL; 211 } 212 213 struct net_bridge 214 { 215 spinlock_t lock; 216 struct list_head port_list; 217 struct net_device *dev; 218 219 struct pcpu_sw_netstats __percpu *stats; 220 spinlock_t hash_lock; 221 struct hlist_head hash[BR_HASH_SIZE]; 222 #ifdef CONFIG_BRIDGE_NETFILTER 223 struct rtable fake_rtable; 224 bool nf_call_iptables; 225 bool nf_call_ip6tables; 226 bool nf_call_arptables; 227 #endif 228 u16 group_fwd_mask; 229 230 /* STP */ 231 bridge_id designated_root; 232 bridge_id bridge_id; 233 u32 root_path_cost; 234 unsigned long max_age; 235 unsigned long hello_time; 236 unsigned long forward_delay; 237 unsigned long bridge_max_age; 238 unsigned long ageing_time; 239 unsigned long bridge_hello_time; 240 unsigned long bridge_forward_delay; 241 242 u8 group_addr[ETH_ALEN]; 243 u16 root_port; 244 245 enum { 246 BR_NO_STP, /* no spanning tree */ 247 BR_KERNEL_STP, /* old STP in kernel */ 248 BR_USER_STP, /* new RSTP in userspace */ 249 } stp_enabled; 250 251 unsigned char topology_change; 252 unsigned char topology_change_detected; 253 254 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 255 unsigned char multicast_router; 256 257 u8 multicast_disabled:1; 258 u8 multicast_querier:1; 259 u8 multicast_query_use_ifaddr:1; 260 261 u32 hash_elasticity; 262 u32 hash_max; 263 264 u32 multicast_last_member_count; 265 u32 multicast_startup_query_count; 266 267 unsigned long multicast_last_member_interval; 268 unsigned long multicast_membership_interval; 269 unsigned long multicast_querier_interval; 270 unsigned long multicast_query_interval; 271 unsigned long multicast_query_response_interval; 272 unsigned long multicast_startup_query_interval; 273 274 spinlock_t multicast_lock; 275 struct net_bridge_mdb_htable __rcu *mdb; 276 struct hlist_head router_list; 277 278 struct timer_list multicast_router_timer; 279 struct bridge_mcast_other_query ip4_other_query; 280 struct bridge_mcast_own_query ip4_own_query; 281 struct bridge_mcast_querier ip4_querier; 282 #if IS_ENABLED(CONFIG_IPV6) 283 struct bridge_mcast_other_query ip6_other_query; 284 struct bridge_mcast_own_query ip6_own_query; 285 struct bridge_mcast_querier ip6_querier; 286 #endif /* IS_ENABLED(CONFIG_IPV6) */ 287 #endif 288 289 struct timer_list hello_timer; 290 struct timer_list tcn_timer; 291 struct timer_list topology_change_timer; 292 struct timer_list gc_timer; 293 struct kobject *ifobj; 294 u32 auto_cnt; 295 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 296 u8 vlan_enabled; 297 struct net_port_vlans __rcu *vlan_info; 298 #endif 299 }; 300 301 struct br_input_skb_cb { 302 struct net_device *brdev; 303 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 304 int igmp; 305 int mrouters_only; 306 #endif 307 }; 308 309 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 310 311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 312 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 313 #else 314 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 315 #endif 316 317 #define br_printk(level, br, format, args...) \ 318 printk(level "%s: " format, (br)->dev->name, ##args) 319 320 #define br_err(__br, format, args...) \ 321 br_printk(KERN_ERR, __br, format, ##args) 322 #define br_warn(__br, format, args...) \ 323 br_printk(KERN_WARNING, __br, format, ##args) 324 #define br_notice(__br, format, args...) \ 325 br_printk(KERN_NOTICE, __br, format, ##args) 326 #define br_info(__br, format, args...) \ 327 br_printk(KERN_INFO, __br, format, ##args) 328 329 #define br_debug(br, format, args...) \ 330 pr_debug("%s: " format, (br)->dev->name, ##args) 331 332 /* called under bridge lock */ 333 static inline int br_is_root_bridge(const struct net_bridge *br) 334 { 335 return !memcmp(&br->bridge_id, &br->designated_root, 8); 336 } 337 338 /* br_device.c */ 339 void br_dev_setup(struct net_device *dev); 340 void br_dev_delete(struct net_device *dev, struct list_head *list); 341 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 342 #ifdef CONFIG_NET_POLL_CONTROLLER 343 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 344 struct sk_buff *skb) 345 { 346 struct netpoll *np = p->np; 347 348 if (np) 349 netpoll_send_skb(np, skb); 350 } 351 352 int br_netpoll_enable(struct net_bridge_port *p); 353 void br_netpoll_disable(struct net_bridge_port *p); 354 #else 355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 356 struct sk_buff *skb) 357 { 358 } 359 360 static inline int br_netpoll_enable(struct net_bridge_port *p) 361 { 362 return 0; 363 } 364 365 static inline void br_netpoll_disable(struct net_bridge_port *p) 366 { 367 } 368 #endif 369 370 /* br_fdb.c */ 371 int br_fdb_init(void); 372 void br_fdb_fini(void); 373 void br_fdb_flush(struct net_bridge *br); 374 void br_fdb_find_delete_local(struct net_bridge *br, 375 const struct net_bridge_port *p, 376 const unsigned char *addr, u16 vid); 377 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 378 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 379 void br_fdb_cleanup(unsigned long arg); 380 void br_fdb_delete_by_port(struct net_bridge *br, 381 const struct net_bridge_port *p, int do_all); 382 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 383 const unsigned char *addr, __u16 vid); 384 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 385 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 386 unsigned long off); 387 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 388 const unsigned char *addr, u16 vid); 389 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 390 const unsigned char *addr, u16 vid, bool added_by_user); 391 392 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 393 struct net_device *dev, const unsigned char *addr); 394 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 395 const unsigned char *addr, u16 nlh_flags); 396 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 397 struct net_device *dev, int idx); 398 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 399 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 400 401 /* br_forward.c */ 402 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 403 int br_dev_queue_push_xmit(struct sk_buff *skb); 404 void br_forward(const struct net_bridge_port *to, 405 struct sk_buff *skb, struct sk_buff *skb0); 406 int br_forward_finish(struct sk_buff *skb); 407 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 408 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 409 struct sk_buff *skb2, bool unicast); 410 411 /* br_if.c */ 412 void br_port_carrier_check(struct net_bridge_port *p); 413 int br_add_bridge(struct net *net, const char *name); 414 int br_del_bridge(struct net *net, const char *name); 415 int br_add_if(struct net_bridge *br, struct net_device *dev); 416 int br_del_if(struct net_bridge *br, struct net_device *dev); 417 int br_min_mtu(const struct net_bridge *br); 418 netdev_features_t br_features_recompute(struct net_bridge *br, 419 netdev_features_t features); 420 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 421 void br_manage_promisc(struct net_bridge *br); 422 423 /* br_input.c */ 424 int br_handle_frame_finish(struct sk_buff *skb); 425 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 426 427 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 428 { 429 return rcu_dereference(dev->rx_handler) == br_handle_frame; 430 } 431 432 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 433 { 434 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 435 } 436 437 /* br_ioctl.c */ 438 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 439 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 440 void __user *arg); 441 442 /* br_multicast.c */ 443 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 444 extern unsigned int br_mdb_rehash_seq; 445 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 446 struct sk_buff *skb, u16 vid); 447 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 448 struct sk_buff *skb, u16 vid); 449 void br_multicast_add_port(struct net_bridge_port *port); 450 void br_multicast_del_port(struct net_bridge_port *port); 451 void br_multicast_enable_port(struct net_bridge_port *port); 452 void br_multicast_disable_port(struct net_bridge_port *port); 453 void br_multicast_init(struct net_bridge *br); 454 void br_multicast_open(struct net_bridge *br); 455 void br_multicast_stop(struct net_bridge *br); 456 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 457 struct sk_buff *skb); 458 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 459 struct sk_buff *skb, struct sk_buff *skb2); 460 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 461 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 462 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 463 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 464 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 465 struct net_bridge_mdb_entry * 466 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 467 struct net_bridge_mdb_entry * 468 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 469 struct br_ip *group); 470 void br_multicast_free_pg(struct rcu_head *head); 471 struct net_bridge_port_group * 472 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 473 struct net_bridge_port_group __rcu *next, 474 unsigned char state); 475 void br_mdb_init(void); 476 void br_mdb_uninit(void); 477 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 478 struct br_ip *group, int type); 479 480 #define mlock_dereference(X, br) \ 481 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 482 483 static inline bool br_multicast_is_router(struct net_bridge *br) 484 { 485 return br->multicast_router == 2 || 486 (br->multicast_router == 1 && 487 timer_pending(&br->multicast_router_timer)); 488 } 489 490 static inline bool 491 __br_multicast_querier_exists(struct net_bridge *br, 492 struct bridge_mcast_other_query *querier) 493 { 494 return time_is_before_jiffies(querier->delay_time) && 495 (br->multicast_querier || timer_pending(&querier->timer)); 496 } 497 498 static inline bool br_multicast_querier_exists(struct net_bridge *br, 499 struct ethhdr *eth) 500 { 501 switch (eth->h_proto) { 502 case (htons(ETH_P_IP)): 503 return __br_multicast_querier_exists(br, &br->ip4_other_query); 504 #if IS_ENABLED(CONFIG_IPV6) 505 case (htons(ETH_P_IPV6)): 506 return __br_multicast_querier_exists(br, &br->ip6_other_query); 507 #endif 508 default: 509 return false; 510 } 511 } 512 #else 513 static inline int br_multicast_rcv(struct net_bridge *br, 514 struct net_bridge_port *port, 515 struct sk_buff *skb, 516 u16 vid) 517 { 518 return 0; 519 } 520 521 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 522 struct sk_buff *skb, u16 vid) 523 { 524 return NULL; 525 } 526 527 static inline void br_multicast_add_port(struct net_bridge_port *port) 528 { 529 } 530 531 static inline void br_multicast_del_port(struct net_bridge_port *port) 532 { 533 } 534 535 static inline void br_multicast_enable_port(struct net_bridge_port *port) 536 { 537 } 538 539 static inline void br_multicast_disable_port(struct net_bridge_port *port) 540 { 541 } 542 543 static inline void br_multicast_init(struct net_bridge *br) 544 { 545 } 546 547 static inline void br_multicast_open(struct net_bridge *br) 548 { 549 } 550 551 static inline void br_multicast_stop(struct net_bridge *br) 552 { 553 } 554 555 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 556 struct sk_buff *skb) 557 { 558 } 559 560 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 561 struct sk_buff *skb, 562 struct sk_buff *skb2) 563 { 564 } 565 static inline bool br_multicast_is_router(struct net_bridge *br) 566 { 567 return 0; 568 } 569 static inline bool br_multicast_querier_exists(struct net_bridge *br, 570 struct ethhdr *eth) 571 { 572 return false; 573 } 574 static inline void br_mdb_init(void) 575 { 576 } 577 static inline void br_mdb_uninit(void) 578 { 579 } 580 #endif 581 582 /* br_vlan.c */ 583 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 584 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 585 struct sk_buff *skb, u16 *vid); 586 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 587 const struct sk_buff *skb); 588 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 589 struct sk_buff *br_handle_vlan(struct net_bridge *br, 590 const struct net_port_vlans *v, 591 struct sk_buff *skb); 592 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 593 int br_vlan_delete(struct net_bridge *br, u16 vid); 594 void br_vlan_flush(struct net_bridge *br); 595 bool br_vlan_find(struct net_bridge *br, u16 vid); 596 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 597 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 598 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 599 void nbp_vlan_flush(struct net_bridge_port *port); 600 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 601 602 static inline struct net_port_vlans *br_get_vlan_info( 603 const struct net_bridge *br) 604 { 605 return rcu_dereference_rtnl(br->vlan_info); 606 } 607 608 static inline struct net_port_vlans *nbp_get_vlan_info( 609 const struct net_bridge_port *p) 610 { 611 return rcu_dereference_rtnl(p->vlan_info); 612 } 613 614 /* Since bridge now depends on 8021Q module, but the time bridge sees the 615 * skb, the vlan tag will always be present if the frame was tagged. 616 */ 617 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 618 { 619 int err = 0; 620 621 if (vlan_tx_tag_present(skb)) 622 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 623 else { 624 *vid = 0; 625 err = -EINVAL; 626 } 627 628 return err; 629 } 630 631 static inline u16 br_get_pvid(const struct net_port_vlans *v) 632 { 633 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if 634 * vid wasn't set 635 */ 636 smp_rmb(); 637 return v->pvid ?: VLAN_N_VID; 638 } 639 640 static inline int br_vlan_enabled(struct net_bridge *br) 641 { 642 return br->vlan_enabled; 643 } 644 #else 645 static inline bool br_allowed_ingress(struct net_bridge *br, 646 struct net_port_vlans *v, 647 struct sk_buff *skb, 648 u16 *vid) 649 { 650 return true; 651 } 652 653 static inline bool br_allowed_egress(struct net_bridge *br, 654 const struct net_port_vlans *v, 655 const struct sk_buff *skb) 656 { 657 return true; 658 } 659 660 static inline bool br_should_learn(struct net_bridge_port *p, 661 struct sk_buff *skb, u16 *vid) 662 { 663 return true; 664 } 665 666 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 667 const struct net_port_vlans *v, 668 struct sk_buff *skb) 669 { 670 return skb; 671 } 672 673 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 674 { 675 return -EOPNOTSUPP; 676 } 677 678 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 679 { 680 return -EOPNOTSUPP; 681 } 682 683 static inline void br_vlan_flush(struct net_bridge *br) 684 { 685 } 686 687 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 688 { 689 return false; 690 } 691 692 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 693 { 694 return -EOPNOTSUPP; 695 } 696 697 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 698 { 699 return -EOPNOTSUPP; 700 } 701 702 static inline void nbp_vlan_flush(struct net_bridge_port *port) 703 { 704 } 705 706 static inline struct net_port_vlans *br_get_vlan_info( 707 const struct net_bridge *br) 708 { 709 return NULL; 710 } 711 static inline struct net_port_vlans *nbp_get_vlan_info( 712 const struct net_bridge_port *p) 713 { 714 return NULL; 715 } 716 717 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 718 { 719 return false; 720 } 721 722 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 723 { 724 return 0; 725 } 726 static inline u16 br_get_pvid(const struct net_port_vlans *v) 727 { 728 return VLAN_N_VID; /* Returns invalid vid */ 729 } 730 731 static inline int br_vlan_enabled(struct net_bridge *br) 732 { 733 return 0; 734 } 735 #endif 736 737 /* br_netfilter.c */ 738 #ifdef CONFIG_BRIDGE_NETFILTER 739 int br_netfilter_init(void); 740 void br_netfilter_fini(void); 741 void br_netfilter_rtable_init(struct net_bridge *); 742 #else 743 #define br_netfilter_init() (0) 744 #define br_netfilter_fini() do { } while (0) 745 #define br_netfilter_rtable_init(x) 746 #endif 747 748 /* br_stp.c */ 749 void br_log_state(const struct net_bridge_port *p); 750 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 751 void br_init_port(struct net_bridge_port *p); 752 void br_become_designated_port(struct net_bridge_port *p); 753 754 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 755 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 756 int br_set_hello_time(struct net_bridge *br, unsigned long x); 757 int br_set_max_age(struct net_bridge *br, unsigned long x); 758 759 760 /* br_stp_if.c */ 761 void br_stp_enable_bridge(struct net_bridge *br); 762 void br_stp_disable_bridge(struct net_bridge *br); 763 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 764 void br_stp_enable_port(struct net_bridge_port *p); 765 void br_stp_disable_port(struct net_bridge_port *p); 766 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 767 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 768 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 769 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 770 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 771 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 772 773 /* br_stp_bpdu.c */ 774 struct stp_proto; 775 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 776 struct net_device *dev); 777 778 /* br_stp_timer.c */ 779 void br_stp_timer_init(struct net_bridge *br); 780 void br_stp_port_timer_init(struct net_bridge_port *p); 781 unsigned long br_timer_value(const struct timer_list *timer); 782 783 /* br.c */ 784 #if IS_ENABLED(CONFIG_ATM_LANE) 785 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 786 #endif 787 788 /* br_netlink.c */ 789 extern struct rtnl_link_ops br_link_ops; 790 int br_netlink_init(void); 791 void br_netlink_fini(void); 792 void br_ifinfo_notify(int event, struct net_bridge_port *port); 793 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 794 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 795 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 796 u32 filter_mask); 797 798 #ifdef CONFIG_SYSFS 799 /* br_sysfs_if.c */ 800 extern const struct sysfs_ops brport_sysfs_ops; 801 int br_sysfs_addif(struct net_bridge_port *p); 802 int br_sysfs_renameif(struct net_bridge_port *p); 803 804 /* br_sysfs_br.c */ 805 int br_sysfs_addbr(struct net_device *dev); 806 void br_sysfs_delbr(struct net_device *dev); 807 808 #else 809 810 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 811 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 812 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 813 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 814 #endif /* CONFIG_SYSFS */ 815 816 #endif 817