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 u16 default_pvid; 303 struct net_port_vlans __rcu *vlan_info; 304 #endif 305 }; 306 307 struct br_input_skb_cb { 308 struct net_device *brdev; 309 310 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 311 int igmp; 312 int mrouters_only; 313 #endif 314 315 u16 frag_max_size; 316 317 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 318 bool vlan_filtered; 319 #endif 320 }; 321 322 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 323 324 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 325 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 326 #else 327 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 328 #endif 329 330 #define br_printk(level, br, format, args...) \ 331 printk(level "%s: " format, (br)->dev->name, ##args) 332 333 #define br_err(__br, format, args...) \ 334 br_printk(KERN_ERR, __br, format, ##args) 335 #define br_warn(__br, format, args...) \ 336 br_printk(KERN_WARNING, __br, format, ##args) 337 #define br_notice(__br, format, args...) \ 338 br_printk(KERN_NOTICE, __br, format, ##args) 339 #define br_info(__br, format, args...) \ 340 br_printk(KERN_INFO, __br, format, ##args) 341 342 #define br_debug(br, format, args...) \ 343 pr_debug("%s: " format, (br)->dev->name, ##args) 344 345 /* called under bridge lock */ 346 static inline int br_is_root_bridge(const struct net_bridge *br) 347 { 348 return !memcmp(&br->bridge_id, &br->designated_root, 8); 349 } 350 351 /* br_device.c */ 352 void br_dev_setup(struct net_device *dev); 353 void br_dev_delete(struct net_device *dev, struct list_head *list); 354 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 355 #ifdef CONFIG_NET_POLL_CONTROLLER 356 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 357 struct sk_buff *skb) 358 { 359 struct netpoll *np = p->np; 360 361 if (np) 362 netpoll_send_skb(np, skb); 363 } 364 365 int br_netpoll_enable(struct net_bridge_port *p); 366 void br_netpoll_disable(struct net_bridge_port *p); 367 #else 368 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 369 struct sk_buff *skb) 370 { 371 } 372 373 static inline int br_netpoll_enable(struct net_bridge_port *p) 374 { 375 return 0; 376 } 377 378 static inline void br_netpoll_disable(struct net_bridge_port *p) 379 { 380 } 381 #endif 382 383 /* br_fdb.c */ 384 int br_fdb_init(void); 385 void br_fdb_fini(void); 386 void br_fdb_flush(struct net_bridge *br); 387 void br_fdb_find_delete_local(struct net_bridge *br, 388 const struct net_bridge_port *p, 389 const unsigned char *addr, u16 vid); 390 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 391 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 392 void br_fdb_cleanup(unsigned long arg); 393 void br_fdb_delete_by_port(struct net_bridge *br, 394 const struct net_bridge_port *p, int do_all); 395 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 396 const unsigned char *addr, __u16 vid); 397 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 398 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 399 unsigned long off); 400 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 401 const unsigned char *addr, u16 vid); 402 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 403 const unsigned char *addr, u16 vid, bool added_by_user); 404 405 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 406 struct net_device *dev, const unsigned char *addr); 407 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 408 const unsigned char *addr, u16 nlh_flags); 409 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 410 struct net_device *dev, struct net_device *fdev, int idx); 411 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 412 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 413 414 /* br_forward.c */ 415 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 416 int br_dev_queue_push_xmit(struct sk_buff *skb); 417 void br_forward(const struct net_bridge_port *to, 418 struct sk_buff *skb, struct sk_buff *skb0); 419 int br_forward_finish(struct sk_buff *skb); 420 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 421 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 422 struct sk_buff *skb2, bool unicast); 423 424 /* br_if.c */ 425 void br_port_carrier_check(struct net_bridge_port *p); 426 int br_add_bridge(struct net *net, const char *name); 427 int br_del_bridge(struct net *net, const char *name); 428 int br_add_if(struct net_bridge *br, struct net_device *dev); 429 int br_del_if(struct net_bridge *br, struct net_device *dev); 430 int br_min_mtu(const struct net_bridge *br); 431 netdev_features_t br_features_recompute(struct net_bridge *br, 432 netdev_features_t features); 433 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 434 void br_manage_promisc(struct net_bridge *br); 435 436 /* br_input.c */ 437 int br_handle_frame_finish(struct sk_buff *skb); 438 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 439 440 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 441 { 442 return rcu_dereference(dev->rx_handler) == br_handle_frame; 443 } 444 445 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 446 { 447 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 448 } 449 450 /* br_ioctl.c */ 451 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 452 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 453 void __user *arg); 454 455 /* br_multicast.c */ 456 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 457 extern unsigned int br_mdb_rehash_seq; 458 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 459 struct sk_buff *skb, u16 vid); 460 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 461 struct sk_buff *skb, u16 vid); 462 void br_multicast_add_port(struct net_bridge_port *port); 463 void br_multicast_del_port(struct net_bridge_port *port); 464 void br_multicast_enable_port(struct net_bridge_port *port); 465 void br_multicast_disable_port(struct net_bridge_port *port); 466 void br_multicast_init(struct net_bridge *br); 467 void br_multicast_open(struct net_bridge *br); 468 void br_multicast_stop(struct net_bridge *br); 469 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 470 struct sk_buff *skb); 471 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 472 struct sk_buff *skb, struct sk_buff *skb2); 473 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 474 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 475 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 476 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 477 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 478 struct net_bridge_mdb_entry * 479 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 480 struct net_bridge_mdb_entry * 481 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 482 struct br_ip *group); 483 void br_multicast_free_pg(struct rcu_head *head); 484 struct net_bridge_port_group * 485 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 486 struct net_bridge_port_group __rcu *next, 487 unsigned char state); 488 void br_mdb_init(void); 489 void br_mdb_uninit(void); 490 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 491 struct br_ip *group, int type); 492 493 #define mlock_dereference(X, br) \ 494 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 495 496 static inline bool br_multicast_is_router(struct net_bridge *br) 497 { 498 return br->multicast_router == 2 || 499 (br->multicast_router == 1 && 500 timer_pending(&br->multicast_router_timer)); 501 } 502 503 static inline bool 504 __br_multicast_querier_exists(struct net_bridge *br, 505 struct bridge_mcast_other_query *querier) 506 { 507 return time_is_before_jiffies(querier->delay_time) && 508 (br->multicast_querier || timer_pending(&querier->timer)); 509 } 510 511 static inline bool br_multicast_querier_exists(struct net_bridge *br, 512 struct ethhdr *eth) 513 { 514 switch (eth->h_proto) { 515 case (htons(ETH_P_IP)): 516 return __br_multicast_querier_exists(br, &br->ip4_other_query); 517 #if IS_ENABLED(CONFIG_IPV6) 518 case (htons(ETH_P_IPV6)): 519 return __br_multicast_querier_exists(br, &br->ip6_other_query); 520 #endif 521 default: 522 return false; 523 } 524 } 525 #else 526 static inline int br_multicast_rcv(struct net_bridge *br, 527 struct net_bridge_port *port, 528 struct sk_buff *skb, 529 u16 vid) 530 { 531 return 0; 532 } 533 534 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 535 struct sk_buff *skb, u16 vid) 536 { 537 return NULL; 538 } 539 540 static inline void br_multicast_add_port(struct net_bridge_port *port) 541 { 542 } 543 544 static inline void br_multicast_del_port(struct net_bridge_port *port) 545 { 546 } 547 548 static inline void br_multicast_enable_port(struct net_bridge_port *port) 549 { 550 } 551 552 static inline void br_multicast_disable_port(struct net_bridge_port *port) 553 { 554 } 555 556 static inline void br_multicast_init(struct net_bridge *br) 557 { 558 } 559 560 static inline void br_multicast_open(struct net_bridge *br) 561 { 562 } 563 564 static inline void br_multicast_stop(struct net_bridge *br) 565 { 566 } 567 568 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 569 struct sk_buff *skb) 570 { 571 } 572 573 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 574 struct sk_buff *skb, 575 struct sk_buff *skb2) 576 { 577 } 578 static inline bool br_multicast_is_router(struct net_bridge *br) 579 { 580 return 0; 581 } 582 static inline bool br_multicast_querier_exists(struct net_bridge *br, 583 struct ethhdr *eth) 584 { 585 return false; 586 } 587 static inline void br_mdb_init(void) 588 { 589 } 590 static inline void br_mdb_uninit(void) 591 { 592 } 593 #endif 594 595 /* br_vlan.c */ 596 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 597 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 598 struct sk_buff *skb, u16 *vid); 599 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 600 const struct sk_buff *skb); 601 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 602 struct sk_buff *br_handle_vlan(struct net_bridge *br, 603 const struct net_port_vlans *v, 604 struct sk_buff *skb); 605 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 606 int br_vlan_delete(struct net_bridge *br, u16 vid); 607 void br_vlan_flush(struct net_bridge *br); 608 bool br_vlan_find(struct net_bridge *br, u16 vid); 609 void br_recalculate_fwd_mask(struct net_bridge *br); 610 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 611 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 612 int br_vlan_init(struct net_bridge *br); 613 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 614 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 615 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 616 void nbp_vlan_flush(struct net_bridge_port *port); 617 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 618 int nbp_vlan_init(struct net_bridge_port *port); 619 620 static inline struct net_port_vlans *br_get_vlan_info( 621 const struct net_bridge *br) 622 { 623 return rcu_dereference_rtnl(br->vlan_info); 624 } 625 626 static inline struct net_port_vlans *nbp_get_vlan_info( 627 const struct net_bridge_port *p) 628 { 629 return rcu_dereference_rtnl(p->vlan_info); 630 } 631 632 /* Since bridge now depends on 8021Q module, but the time bridge sees the 633 * skb, the vlan tag will always be present if the frame was tagged. 634 */ 635 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 636 { 637 int err = 0; 638 639 if (vlan_tx_tag_present(skb)) 640 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 641 else { 642 *vid = 0; 643 err = -EINVAL; 644 } 645 646 return err; 647 } 648 649 static inline u16 br_get_pvid(const struct net_port_vlans *v) 650 { 651 if (!v) 652 return 0; 653 654 smp_rmb(); 655 return v->pvid; 656 } 657 658 static inline int br_vlan_enabled(struct net_bridge *br) 659 { 660 return br->vlan_enabled; 661 } 662 #else 663 static inline bool br_allowed_ingress(struct net_bridge *br, 664 struct net_port_vlans *v, 665 struct sk_buff *skb, 666 u16 *vid) 667 { 668 return true; 669 } 670 671 static inline bool br_allowed_egress(struct net_bridge *br, 672 const struct net_port_vlans *v, 673 const struct sk_buff *skb) 674 { 675 return true; 676 } 677 678 static inline bool br_should_learn(struct net_bridge_port *p, 679 struct sk_buff *skb, u16 *vid) 680 { 681 return true; 682 } 683 684 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 685 const struct net_port_vlans *v, 686 struct sk_buff *skb) 687 { 688 return skb; 689 } 690 691 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 692 { 693 return -EOPNOTSUPP; 694 } 695 696 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 697 { 698 return -EOPNOTSUPP; 699 } 700 701 static inline void br_vlan_flush(struct net_bridge *br) 702 { 703 } 704 705 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 706 { 707 return false; 708 } 709 710 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 711 { 712 } 713 714 static inline int br_vlan_init(struct net_bridge *br) 715 { 716 return 0; 717 } 718 719 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 720 { 721 return -EOPNOTSUPP; 722 } 723 724 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 725 { 726 return -EOPNOTSUPP; 727 } 728 729 static inline void nbp_vlan_flush(struct net_bridge_port *port) 730 { 731 } 732 733 static inline struct net_port_vlans *br_get_vlan_info( 734 const struct net_bridge *br) 735 { 736 return NULL; 737 } 738 static inline struct net_port_vlans *nbp_get_vlan_info( 739 const struct net_bridge_port *p) 740 { 741 return NULL; 742 } 743 744 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 745 { 746 return false; 747 } 748 749 static inline int nbp_vlan_init(struct net_bridge_port *port) 750 { 751 return 0; 752 } 753 754 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 755 { 756 return 0; 757 } 758 static inline u16 br_get_pvid(const struct net_port_vlans *v) 759 { 760 return 0; 761 } 762 763 static inline int br_vlan_enabled(struct net_bridge *br) 764 { 765 return 0; 766 } 767 #endif 768 769 /* br_netfilter.c */ 770 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 771 int br_nf_core_init(void); 772 void br_nf_core_fini(void); 773 void br_netfilter_rtable_init(struct net_bridge *); 774 #else 775 static inline int br_nf_core_init(void) { return 0; } 776 static inline void br_nf_core_fini(void) {} 777 #define br_netfilter_rtable_init(x) 778 #endif 779 780 /* br_stp.c */ 781 void br_log_state(const struct net_bridge_port *p); 782 void br_set_state(struct net_bridge_port *p, unsigned int state); 783 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 784 void br_init_port(struct net_bridge_port *p); 785 void br_become_designated_port(struct net_bridge_port *p); 786 787 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 788 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 789 int br_set_hello_time(struct net_bridge *br, unsigned long x); 790 int br_set_max_age(struct net_bridge *br, unsigned long x); 791 792 793 /* br_stp_if.c */ 794 void br_stp_enable_bridge(struct net_bridge *br); 795 void br_stp_disable_bridge(struct net_bridge *br); 796 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 797 void br_stp_enable_port(struct net_bridge_port *p); 798 void br_stp_disable_port(struct net_bridge_port *p); 799 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 800 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 801 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 802 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 803 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 804 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 805 806 /* br_stp_bpdu.c */ 807 struct stp_proto; 808 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 809 struct net_device *dev); 810 811 /* br_stp_timer.c */ 812 void br_stp_timer_init(struct net_bridge *br); 813 void br_stp_port_timer_init(struct net_bridge_port *p); 814 unsigned long br_timer_value(const struct timer_list *timer); 815 816 /* br.c */ 817 #if IS_ENABLED(CONFIG_ATM_LANE) 818 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 819 #endif 820 821 /* br_netlink.c */ 822 extern struct rtnl_link_ops br_link_ops; 823 int br_netlink_init(void); 824 void br_netlink_fini(void); 825 void br_ifinfo_notify(int event, struct net_bridge_port *port); 826 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 827 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 828 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 829 u32 filter_mask); 830 831 #ifdef CONFIG_SYSFS 832 /* br_sysfs_if.c */ 833 extern const struct sysfs_ops brport_sysfs_ops; 834 int br_sysfs_addif(struct net_bridge_port *p); 835 int br_sysfs_renameif(struct net_bridge_port *p); 836 837 /* br_sysfs_br.c */ 838 int br_sysfs_addbr(struct net_device *dev); 839 void br_sysfs_delbr(struct net_device *dev); 840 841 #else 842 843 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 844 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 845 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 846 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 847 #endif /* CONFIG_SYSFS */ 848 849 #endif 850