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 #define BR_PROXYARP 0x00000100 176 177 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 178 struct bridge_mcast_own_query ip4_own_query; 179 #if IS_ENABLED(CONFIG_IPV6) 180 struct bridge_mcast_own_query ip6_own_query; 181 #endif /* IS_ENABLED(CONFIG_IPV6) */ 182 unsigned char multicast_router; 183 struct timer_list multicast_router_timer; 184 struct hlist_head mglist; 185 struct hlist_node rlist; 186 #endif 187 188 #ifdef CONFIG_SYSFS 189 char sysfs_name[IFNAMSIZ]; 190 #endif 191 192 #ifdef CONFIG_NET_POLL_CONTROLLER 193 struct netpoll *np; 194 #endif 195 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 196 struct net_port_vlans __rcu *vlan_info; 197 #endif 198 }; 199 200 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 201 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 202 203 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 204 205 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 206 { 207 return rcu_dereference(dev->rx_handler_data); 208 } 209 210 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 211 { 212 return br_port_exists(dev) ? 213 rtnl_dereference(dev->rx_handler_data) : NULL; 214 } 215 216 struct net_bridge 217 { 218 spinlock_t lock; 219 struct list_head port_list; 220 struct net_device *dev; 221 222 struct pcpu_sw_netstats __percpu *stats; 223 spinlock_t hash_lock; 224 struct hlist_head hash[BR_HASH_SIZE]; 225 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 226 struct rtable fake_rtable; 227 bool nf_call_iptables; 228 bool nf_call_ip6tables; 229 bool nf_call_arptables; 230 #endif 231 u16 group_fwd_mask; 232 u16 group_fwd_mask_required; 233 234 /* STP */ 235 bridge_id designated_root; 236 bridge_id bridge_id; 237 u32 root_path_cost; 238 unsigned long max_age; 239 unsigned long hello_time; 240 unsigned long forward_delay; 241 unsigned long bridge_max_age; 242 unsigned long ageing_time; 243 unsigned long bridge_hello_time; 244 unsigned long bridge_forward_delay; 245 246 u8 group_addr[ETH_ALEN]; 247 bool group_addr_set; 248 u16 root_port; 249 250 enum { 251 BR_NO_STP, /* no spanning tree */ 252 BR_KERNEL_STP, /* old STP in kernel */ 253 BR_USER_STP, /* new RSTP in userspace */ 254 } stp_enabled; 255 256 unsigned char topology_change; 257 unsigned char topology_change_detected; 258 259 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 260 unsigned char multicast_router; 261 262 u8 multicast_disabled:1; 263 u8 multicast_querier:1; 264 u8 multicast_query_use_ifaddr:1; 265 266 u32 hash_elasticity; 267 u32 hash_max; 268 269 u32 multicast_last_member_count; 270 u32 multicast_startup_query_count; 271 272 unsigned long multicast_last_member_interval; 273 unsigned long multicast_membership_interval; 274 unsigned long multicast_querier_interval; 275 unsigned long multicast_query_interval; 276 unsigned long multicast_query_response_interval; 277 unsigned long multicast_startup_query_interval; 278 279 spinlock_t multicast_lock; 280 struct net_bridge_mdb_htable __rcu *mdb; 281 struct hlist_head router_list; 282 283 struct timer_list multicast_router_timer; 284 struct bridge_mcast_other_query ip4_other_query; 285 struct bridge_mcast_own_query ip4_own_query; 286 struct bridge_mcast_querier ip4_querier; 287 #if IS_ENABLED(CONFIG_IPV6) 288 struct bridge_mcast_other_query ip6_other_query; 289 struct bridge_mcast_own_query ip6_own_query; 290 struct bridge_mcast_querier ip6_querier; 291 #endif /* IS_ENABLED(CONFIG_IPV6) */ 292 #endif 293 294 struct timer_list hello_timer; 295 struct timer_list tcn_timer; 296 struct timer_list topology_change_timer; 297 struct timer_list gc_timer; 298 struct kobject *ifobj; 299 u32 auto_cnt; 300 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 301 u8 vlan_enabled; 302 __be16 vlan_proto; 303 u16 default_pvid; 304 struct net_port_vlans __rcu *vlan_info; 305 #endif 306 }; 307 308 struct br_input_skb_cb { 309 struct net_device *brdev; 310 311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 312 int igmp; 313 int mrouters_only; 314 #endif 315 316 u16 frag_max_size; 317 318 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 319 bool vlan_filtered; 320 #endif 321 }; 322 323 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 324 325 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 326 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 327 #else 328 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 329 #endif 330 331 #define br_printk(level, br, format, args...) \ 332 printk(level "%s: " format, (br)->dev->name, ##args) 333 334 #define br_err(__br, format, args...) \ 335 br_printk(KERN_ERR, __br, format, ##args) 336 #define br_warn(__br, format, args...) \ 337 br_printk(KERN_WARNING, __br, format, ##args) 338 #define br_notice(__br, format, args...) \ 339 br_printk(KERN_NOTICE, __br, format, ##args) 340 #define br_info(__br, format, args...) \ 341 br_printk(KERN_INFO, __br, format, ##args) 342 343 #define br_debug(br, format, args...) \ 344 pr_debug("%s: " format, (br)->dev->name, ##args) 345 346 /* called under bridge lock */ 347 static inline int br_is_root_bridge(const struct net_bridge *br) 348 { 349 return !memcmp(&br->bridge_id, &br->designated_root, 8); 350 } 351 352 /* br_device.c */ 353 void br_dev_setup(struct net_device *dev); 354 void br_dev_delete(struct net_device *dev, struct list_head *list); 355 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 356 #ifdef CONFIG_NET_POLL_CONTROLLER 357 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 358 struct sk_buff *skb) 359 { 360 struct netpoll *np = p->np; 361 362 if (np) 363 netpoll_send_skb(np, skb); 364 } 365 366 int br_netpoll_enable(struct net_bridge_port *p); 367 void br_netpoll_disable(struct net_bridge_port *p); 368 #else 369 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 370 struct sk_buff *skb) 371 { 372 } 373 374 static inline int br_netpoll_enable(struct net_bridge_port *p) 375 { 376 return 0; 377 } 378 379 static inline void br_netpoll_disable(struct net_bridge_port *p) 380 { 381 } 382 #endif 383 384 /* br_fdb.c */ 385 int br_fdb_init(void); 386 void br_fdb_fini(void); 387 void br_fdb_flush(struct net_bridge *br); 388 void br_fdb_find_delete_local(struct net_bridge *br, 389 const struct net_bridge_port *p, 390 const unsigned char *addr, u16 vid); 391 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 392 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 393 void br_fdb_cleanup(unsigned long arg); 394 void br_fdb_delete_by_port(struct net_bridge *br, 395 const struct net_bridge_port *p, int do_all); 396 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 397 const unsigned char *addr, __u16 vid); 398 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 399 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 400 unsigned long off); 401 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 402 const unsigned char *addr, u16 vid); 403 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 404 const unsigned char *addr, u16 vid, bool added_by_user); 405 406 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 407 struct net_device *dev, const unsigned char *addr); 408 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 409 const unsigned char *addr, u16 nlh_flags); 410 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 411 struct net_device *dev, struct net_device *fdev, int idx); 412 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 413 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 414 415 /* br_forward.c */ 416 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 417 int br_dev_queue_push_xmit(struct sk_buff *skb); 418 void br_forward(const struct net_bridge_port *to, 419 struct sk_buff *skb, struct sk_buff *skb0); 420 int br_forward_finish(struct sk_buff *skb); 421 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 422 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 423 struct sk_buff *skb2, bool unicast); 424 425 /* br_if.c */ 426 void br_port_carrier_check(struct net_bridge_port *p); 427 int br_add_bridge(struct net *net, const char *name); 428 int br_del_bridge(struct net *net, const char *name); 429 int br_add_if(struct net_bridge *br, struct net_device *dev); 430 int br_del_if(struct net_bridge *br, struct net_device *dev); 431 int br_min_mtu(const struct net_bridge *br); 432 netdev_features_t br_features_recompute(struct net_bridge *br, 433 netdev_features_t features); 434 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 435 void br_manage_promisc(struct net_bridge *br); 436 437 /* br_input.c */ 438 int br_handle_frame_finish(struct sk_buff *skb); 439 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 440 441 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 442 { 443 return rcu_dereference(dev->rx_handler) == br_handle_frame; 444 } 445 446 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 447 { 448 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 449 } 450 451 /* br_ioctl.c */ 452 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 453 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 454 void __user *arg); 455 456 /* br_multicast.c */ 457 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 458 extern unsigned int br_mdb_rehash_seq; 459 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 460 struct sk_buff *skb, u16 vid); 461 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 462 struct sk_buff *skb, u16 vid); 463 void br_multicast_add_port(struct net_bridge_port *port); 464 void br_multicast_del_port(struct net_bridge_port *port); 465 void br_multicast_enable_port(struct net_bridge_port *port); 466 void br_multicast_disable_port(struct net_bridge_port *port); 467 void br_multicast_init(struct net_bridge *br); 468 void br_multicast_open(struct net_bridge *br); 469 void br_multicast_stop(struct net_bridge *br); 470 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 471 struct sk_buff *skb); 472 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 473 struct sk_buff *skb, struct sk_buff *skb2); 474 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 475 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 476 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 477 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 478 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 479 struct net_bridge_mdb_entry * 480 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 481 struct net_bridge_mdb_entry * 482 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 483 struct br_ip *group); 484 void br_multicast_free_pg(struct rcu_head *head); 485 struct net_bridge_port_group * 486 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 487 struct net_bridge_port_group __rcu *next, 488 unsigned char state); 489 void br_mdb_init(void); 490 void br_mdb_uninit(void); 491 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 492 struct br_ip *group, int type); 493 494 #define mlock_dereference(X, br) \ 495 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 496 497 static inline bool br_multicast_is_router(struct net_bridge *br) 498 { 499 return br->multicast_router == 2 || 500 (br->multicast_router == 1 && 501 timer_pending(&br->multicast_router_timer)); 502 } 503 504 static inline bool 505 __br_multicast_querier_exists(struct net_bridge *br, 506 struct bridge_mcast_other_query *querier) 507 { 508 return time_is_before_jiffies(querier->delay_time) && 509 (br->multicast_querier || timer_pending(&querier->timer)); 510 } 511 512 static inline bool br_multicast_querier_exists(struct net_bridge *br, 513 struct ethhdr *eth) 514 { 515 switch (eth->h_proto) { 516 case (htons(ETH_P_IP)): 517 return __br_multicast_querier_exists(br, &br->ip4_other_query); 518 #if IS_ENABLED(CONFIG_IPV6) 519 case (htons(ETH_P_IPV6)): 520 return __br_multicast_querier_exists(br, &br->ip6_other_query); 521 #endif 522 default: 523 return false; 524 } 525 } 526 #else 527 static inline int br_multicast_rcv(struct net_bridge *br, 528 struct net_bridge_port *port, 529 struct sk_buff *skb, 530 u16 vid) 531 { 532 return 0; 533 } 534 535 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 536 struct sk_buff *skb, u16 vid) 537 { 538 return NULL; 539 } 540 541 static inline void br_multicast_add_port(struct net_bridge_port *port) 542 { 543 } 544 545 static inline void br_multicast_del_port(struct net_bridge_port *port) 546 { 547 } 548 549 static inline void br_multicast_enable_port(struct net_bridge_port *port) 550 { 551 } 552 553 static inline void br_multicast_disable_port(struct net_bridge_port *port) 554 { 555 } 556 557 static inline void br_multicast_init(struct net_bridge *br) 558 { 559 } 560 561 static inline void br_multicast_open(struct net_bridge *br) 562 { 563 } 564 565 static inline void br_multicast_stop(struct net_bridge *br) 566 { 567 } 568 569 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 570 struct sk_buff *skb) 571 { 572 } 573 574 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 575 struct sk_buff *skb, 576 struct sk_buff *skb2) 577 { 578 } 579 static inline bool br_multicast_is_router(struct net_bridge *br) 580 { 581 return 0; 582 } 583 static inline bool br_multicast_querier_exists(struct net_bridge *br, 584 struct ethhdr *eth) 585 { 586 return false; 587 } 588 static inline void br_mdb_init(void) 589 { 590 } 591 static inline void br_mdb_uninit(void) 592 { 593 } 594 #endif 595 596 /* br_vlan.c */ 597 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 598 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 599 struct sk_buff *skb, u16 *vid); 600 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 601 const struct sk_buff *skb); 602 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 603 struct sk_buff *br_handle_vlan(struct net_bridge *br, 604 const struct net_port_vlans *v, 605 struct sk_buff *skb); 606 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 607 int br_vlan_delete(struct net_bridge *br, u16 vid); 608 void br_vlan_flush(struct net_bridge *br); 609 bool br_vlan_find(struct net_bridge *br, u16 vid); 610 void br_recalculate_fwd_mask(struct net_bridge *br); 611 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 612 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 613 int br_vlan_init(struct net_bridge *br); 614 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 615 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 616 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 617 void nbp_vlan_flush(struct net_bridge_port *port); 618 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 619 int nbp_vlan_init(struct net_bridge_port *port); 620 621 static inline struct net_port_vlans *br_get_vlan_info( 622 const struct net_bridge *br) 623 { 624 return rcu_dereference_rtnl(br->vlan_info); 625 } 626 627 static inline struct net_port_vlans *nbp_get_vlan_info( 628 const struct net_bridge_port *p) 629 { 630 return rcu_dereference_rtnl(p->vlan_info); 631 } 632 633 /* Since bridge now depends on 8021Q module, but the time bridge sees the 634 * skb, the vlan tag will always be present if the frame was tagged. 635 */ 636 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 637 { 638 int err = 0; 639 640 if (vlan_tx_tag_present(skb)) 641 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 642 else { 643 *vid = 0; 644 err = -EINVAL; 645 } 646 647 return err; 648 } 649 650 static inline u16 br_get_pvid(const struct net_port_vlans *v) 651 { 652 if (!v) 653 return 0; 654 655 smp_rmb(); 656 return v->pvid; 657 } 658 659 static inline int br_vlan_enabled(struct net_bridge *br) 660 { 661 return br->vlan_enabled; 662 } 663 #else 664 static inline bool br_allowed_ingress(struct net_bridge *br, 665 struct net_port_vlans *v, 666 struct sk_buff *skb, 667 u16 *vid) 668 { 669 return true; 670 } 671 672 static inline bool br_allowed_egress(struct net_bridge *br, 673 const struct net_port_vlans *v, 674 const struct sk_buff *skb) 675 { 676 return true; 677 } 678 679 static inline bool br_should_learn(struct net_bridge_port *p, 680 struct sk_buff *skb, u16 *vid) 681 { 682 return true; 683 } 684 685 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 686 const struct net_port_vlans *v, 687 struct sk_buff *skb) 688 { 689 return skb; 690 } 691 692 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 693 { 694 return -EOPNOTSUPP; 695 } 696 697 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 698 { 699 return -EOPNOTSUPP; 700 } 701 702 static inline void br_vlan_flush(struct net_bridge *br) 703 { 704 } 705 706 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 707 { 708 return false; 709 } 710 711 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 712 { 713 } 714 715 static inline int br_vlan_init(struct net_bridge *br) 716 { 717 return 0; 718 } 719 720 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 721 { 722 return -EOPNOTSUPP; 723 } 724 725 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 726 { 727 return -EOPNOTSUPP; 728 } 729 730 static inline void nbp_vlan_flush(struct net_bridge_port *port) 731 { 732 } 733 734 static inline struct net_port_vlans *br_get_vlan_info( 735 const struct net_bridge *br) 736 { 737 return NULL; 738 } 739 static inline struct net_port_vlans *nbp_get_vlan_info( 740 const struct net_bridge_port *p) 741 { 742 return NULL; 743 } 744 745 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 746 { 747 return false; 748 } 749 750 static inline int nbp_vlan_init(struct net_bridge_port *port) 751 { 752 return 0; 753 } 754 755 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 756 { 757 return 0; 758 } 759 static inline u16 br_get_pvid(const struct net_port_vlans *v) 760 { 761 return 0; 762 } 763 764 static inline int br_vlan_enabled(struct net_bridge *br) 765 { 766 return 0; 767 } 768 #endif 769 770 /* br_netfilter.c */ 771 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 772 int br_nf_core_init(void); 773 void br_nf_core_fini(void); 774 void br_netfilter_rtable_init(struct net_bridge *); 775 #else 776 static inline int br_nf_core_init(void) { return 0; } 777 static inline void br_nf_core_fini(void) {} 778 #define br_netfilter_rtable_init(x) 779 #endif 780 781 /* br_stp.c */ 782 void br_log_state(const struct net_bridge_port *p); 783 void br_set_state(struct net_bridge_port *p, unsigned int state); 784 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 785 void br_init_port(struct net_bridge_port *p); 786 void br_become_designated_port(struct net_bridge_port *p); 787 788 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 789 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 790 int br_set_hello_time(struct net_bridge *br, unsigned long x); 791 int br_set_max_age(struct net_bridge *br, unsigned long x); 792 793 794 /* br_stp_if.c */ 795 void br_stp_enable_bridge(struct net_bridge *br); 796 void br_stp_disable_bridge(struct net_bridge *br); 797 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 798 void br_stp_enable_port(struct net_bridge_port *p); 799 void br_stp_disable_port(struct net_bridge_port *p); 800 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 801 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 802 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 803 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 804 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 805 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 806 807 /* br_stp_bpdu.c */ 808 struct stp_proto; 809 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 810 struct net_device *dev); 811 812 /* br_stp_timer.c */ 813 void br_stp_timer_init(struct net_bridge *br); 814 void br_stp_port_timer_init(struct net_bridge_port *p); 815 unsigned long br_timer_value(const struct timer_list *timer); 816 817 /* br.c */ 818 #if IS_ENABLED(CONFIG_ATM_LANE) 819 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 820 #endif 821 822 /* br_netlink.c */ 823 extern struct rtnl_link_ops br_link_ops; 824 int br_netlink_init(void); 825 void br_netlink_fini(void); 826 void br_ifinfo_notify(int event, struct net_bridge_port *port); 827 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 828 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 829 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 830 u32 filter_mask); 831 832 #ifdef CONFIG_SYSFS 833 /* br_sysfs_if.c */ 834 extern const struct sysfs_ops brport_sysfs_ops; 835 int br_sysfs_addif(struct net_bridge_port *p); 836 int br_sysfs_renameif(struct net_bridge_port *p); 837 838 /* br_sysfs_br.c */ 839 int br_sysfs_addbr(struct net_device *dev); 840 void br_sysfs_delbr(struct net_device *dev); 841 842 #else 843 844 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 845 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 846 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 847 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 848 #endif /* CONFIG_SYSFS */ 849 850 #endif 851