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 <net/ip6_fib.h> 22 #include <linux/if_vlan.h> 23 24 #define BR_HASH_BITS 8 25 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 26 27 #define BR_HOLD_TIME (1*HZ) 28 29 #define BR_PORT_BITS 10 30 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 31 #define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID) 32 33 #define BR_VERSION "2.3" 34 35 /* Control of forwarding link local multicast */ 36 #define BR_GROUPFWD_DEFAULT 0 37 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 38 #define BR_GROUPFWD_RESTRICTED 0x0007u 39 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 40 #define BR_GROUPFWD_8021AD 0xB801u 41 42 /* Path to usermode spanning tree program */ 43 #define BR_STP_PROG "/sbin/bridge-stp" 44 45 typedef struct bridge_id bridge_id; 46 typedef struct mac_addr mac_addr; 47 typedef __u16 port_id; 48 49 struct bridge_id 50 { 51 unsigned char prio[2]; 52 unsigned char addr[ETH_ALEN]; 53 }; 54 55 struct mac_addr 56 { 57 unsigned char addr[ETH_ALEN]; 58 }; 59 60 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 61 /* our own querier */ 62 struct bridge_mcast_own_query { 63 struct timer_list timer; 64 u32 startup_sent; 65 }; 66 67 /* other querier */ 68 struct bridge_mcast_other_query { 69 struct timer_list timer; 70 unsigned long delay_time; 71 }; 72 73 /* selected querier */ 74 struct bridge_mcast_querier { 75 struct br_ip addr; 76 struct net_bridge_port __rcu *port; 77 }; 78 #endif 79 80 struct net_port_vlans { 81 u16 port_idx; 82 u16 pvid; 83 union { 84 struct net_bridge_port *port; 85 struct net_bridge *br; 86 } parent; 87 struct rcu_head rcu; 88 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 89 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 90 u16 num_vlans; 91 }; 92 93 struct net_bridge_fdb_entry 94 { 95 struct hlist_node hlist; 96 struct net_bridge_port *dst; 97 98 unsigned long updated; 99 unsigned long used; 100 mac_addr addr; 101 __u16 vlan_id; 102 unsigned char is_local:1, 103 is_static:1, 104 added_by_user:1, 105 added_by_external_learn:1; 106 struct rcu_head rcu; 107 }; 108 109 struct net_bridge_port_group { 110 struct net_bridge_port *port; 111 struct net_bridge_port_group __rcu *next; 112 struct hlist_node mglist; 113 struct rcu_head rcu; 114 struct timer_list timer; 115 struct br_ip addr; 116 unsigned char state; 117 }; 118 119 struct net_bridge_mdb_entry 120 { 121 struct hlist_node hlist[2]; 122 struct net_bridge *br; 123 struct net_bridge_port_group __rcu *ports; 124 struct rcu_head rcu; 125 struct timer_list timer; 126 struct br_ip addr; 127 bool mglist; 128 }; 129 130 struct net_bridge_mdb_htable 131 { 132 struct hlist_head *mhash; 133 struct rcu_head rcu; 134 struct net_bridge_mdb_htable *old; 135 u32 size; 136 u32 max; 137 u32 secret; 138 u32 ver; 139 }; 140 141 struct net_bridge_port 142 { 143 struct net_bridge *br; 144 struct net_device *dev; 145 struct list_head list; 146 147 /* STP */ 148 u8 priority; 149 u8 state; 150 u16 port_no; 151 unsigned char topology_change_ack; 152 unsigned char config_pending; 153 port_id port_id; 154 port_id designated_port; 155 bridge_id designated_root; 156 bridge_id designated_bridge; 157 u32 path_cost; 158 u32 designated_cost; 159 unsigned long designated_age; 160 161 struct timer_list forward_delay_timer; 162 struct timer_list hold_timer; 163 struct timer_list message_age_timer; 164 struct kobject kobj; 165 struct rcu_head rcu; 166 167 unsigned long flags; 168 169 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 170 struct bridge_mcast_own_query ip4_own_query; 171 #if IS_ENABLED(CONFIG_IPV6) 172 struct bridge_mcast_own_query ip6_own_query; 173 #endif /* IS_ENABLED(CONFIG_IPV6) */ 174 unsigned char multicast_router; 175 struct timer_list multicast_router_timer; 176 struct hlist_head mglist; 177 struct hlist_node rlist; 178 #endif 179 180 #ifdef CONFIG_SYSFS 181 char sysfs_name[IFNAMSIZ]; 182 #endif 183 184 #ifdef CONFIG_NET_POLL_CONTROLLER 185 struct netpoll *np; 186 #endif 187 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 188 struct net_port_vlans __rcu *vlan_info; 189 #endif 190 }; 191 192 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 193 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 194 195 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 196 197 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 198 { 199 return rcu_dereference(dev->rx_handler_data); 200 } 201 202 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 203 { 204 return br_port_exists(dev) ? 205 rtnl_dereference(dev->rx_handler_data) : NULL; 206 } 207 208 struct net_bridge 209 { 210 spinlock_t lock; 211 struct list_head port_list; 212 struct net_device *dev; 213 214 struct pcpu_sw_netstats __percpu *stats; 215 spinlock_t hash_lock; 216 struct hlist_head hash[BR_HASH_SIZE]; 217 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 218 union { 219 struct rtable fake_rtable; 220 struct rt6_info fake_rt6_info; 221 }; 222 bool nf_call_iptables; 223 bool nf_call_ip6tables; 224 bool nf_call_arptables; 225 #endif 226 u16 group_fwd_mask; 227 u16 group_fwd_mask_required; 228 229 /* STP */ 230 bridge_id designated_root; 231 bridge_id bridge_id; 232 u32 root_path_cost; 233 unsigned long max_age; 234 unsigned long hello_time; 235 unsigned long forward_delay; 236 unsigned long bridge_max_age; 237 unsigned long ageing_time; 238 unsigned long bridge_hello_time; 239 unsigned long bridge_forward_delay; 240 241 u8 group_addr[ETH_ALEN]; 242 bool group_addr_set; 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 __be16 vlan_proto; 298 u16 default_pvid; 299 struct net_port_vlans __rcu *vlan_info; 300 #endif 301 }; 302 303 struct br_input_skb_cb { 304 struct net_device *brdev; 305 306 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 307 int igmp; 308 int mrouters_only; 309 #endif 310 311 bool proxyarp_replied; 312 313 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 314 bool vlan_filtered; 315 #endif 316 }; 317 318 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 319 320 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 321 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 322 #else 323 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 324 #endif 325 326 #define br_printk(level, br, format, args...) \ 327 printk(level "%s: " format, (br)->dev->name, ##args) 328 329 #define br_err(__br, format, args...) \ 330 br_printk(KERN_ERR, __br, format, ##args) 331 #define br_warn(__br, format, args...) \ 332 br_printk(KERN_WARNING, __br, format, ##args) 333 #define br_notice(__br, format, args...) \ 334 br_printk(KERN_NOTICE, __br, format, ##args) 335 #define br_info(__br, format, args...) \ 336 br_printk(KERN_INFO, __br, format, ##args) 337 338 #define br_debug(br, format, args...) \ 339 pr_debug("%s: " format, (br)->dev->name, ##args) 340 341 /* called under bridge lock */ 342 static inline int br_is_root_bridge(const struct net_bridge *br) 343 { 344 return !memcmp(&br->bridge_id, &br->designated_root, 8); 345 } 346 347 /* br_device.c */ 348 void br_dev_setup(struct net_device *dev); 349 void br_dev_delete(struct net_device *dev, struct list_head *list); 350 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 351 #ifdef CONFIG_NET_POLL_CONTROLLER 352 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 353 struct sk_buff *skb) 354 { 355 struct netpoll *np = p->np; 356 357 if (np) 358 netpoll_send_skb(np, skb); 359 } 360 361 int br_netpoll_enable(struct net_bridge_port *p); 362 void br_netpoll_disable(struct net_bridge_port *p); 363 #else 364 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 365 struct sk_buff *skb) 366 { 367 } 368 369 static inline int br_netpoll_enable(struct net_bridge_port *p) 370 { 371 return 0; 372 } 373 374 static inline void br_netpoll_disable(struct net_bridge_port *p) 375 { 376 } 377 #endif 378 379 /* br_fdb.c */ 380 int br_fdb_init(void); 381 void br_fdb_fini(void); 382 void br_fdb_flush(struct net_bridge *br); 383 void br_fdb_find_delete_local(struct net_bridge *br, 384 const struct net_bridge_port *p, 385 const unsigned char *addr, u16 vid); 386 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 387 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 388 void br_fdb_cleanup(unsigned long arg); 389 void br_fdb_delete_by_port(struct net_bridge *br, 390 const struct net_bridge_port *p, u16 vid, int do_all); 391 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 392 const unsigned char *addr, __u16 vid); 393 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 394 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 395 unsigned long off); 396 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 397 const unsigned char *addr, u16 vid); 398 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 399 const unsigned char *addr, u16 vid, bool added_by_user); 400 401 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 402 struct net_device *dev, const unsigned char *addr, u16 vid); 403 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 404 const unsigned char *addr, u16 vid, u16 nlh_flags); 405 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 406 struct net_device *dev, struct net_device *fdev, int idx); 407 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 408 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 409 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 410 const unsigned char *addr, u16 vid); 411 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 412 const unsigned char *addr, u16 vid); 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 sock *sk, 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 sock *sk, 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 sock *sk, 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_dev_del(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, u8 state); 493 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 494 int type); 495 496 #define mlock_dereference(X, br) \ 497 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 498 499 static inline bool br_multicast_is_router(struct net_bridge *br) 500 { 501 return br->multicast_router == 2 || 502 (br->multicast_router == 1 && 503 timer_pending(&br->multicast_router_timer)); 504 } 505 506 static inline bool 507 __br_multicast_querier_exists(struct net_bridge *br, 508 struct bridge_mcast_other_query *querier) 509 { 510 return time_is_before_jiffies(querier->delay_time) && 511 (br->multicast_querier || timer_pending(&querier->timer)); 512 } 513 514 static inline bool br_multicast_querier_exists(struct net_bridge *br, 515 struct ethhdr *eth) 516 { 517 switch (eth->h_proto) { 518 case (htons(ETH_P_IP)): 519 return __br_multicast_querier_exists(br, &br->ip4_other_query); 520 #if IS_ENABLED(CONFIG_IPV6) 521 case (htons(ETH_P_IPV6)): 522 return __br_multicast_querier_exists(br, &br->ip6_other_query); 523 #endif 524 default: 525 return false; 526 } 527 } 528 #else 529 static inline int br_multicast_rcv(struct net_bridge *br, 530 struct net_bridge_port *port, 531 struct sk_buff *skb, 532 u16 vid) 533 { 534 return 0; 535 } 536 537 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 538 struct sk_buff *skb, u16 vid) 539 { 540 return NULL; 541 } 542 543 static inline void br_multicast_add_port(struct net_bridge_port *port) 544 { 545 } 546 547 static inline void br_multicast_del_port(struct net_bridge_port *port) 548 { 549 } 550 551 static inline void br_multicast_enable_port(struct net_bridge_port *port) 552 { 553 } 554 555 static inline void br_multicast_disable_port(struct net_bridge_port *port) 556 { 557 } 558 559 static inline void br_multicast_init(struct net_bridge *br) 560 { 561 } 562 563 static inline void br_multicast_open(struct net_bridge *br) 564 { 565 } 566 567 static inline void br_multicast_stop(struct net_bridge *br) 568 { 569 } 570 571 static inline void br_multicast_dev_del(struct net_bridge *br) 572 { 573 } 574 575 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 576 struct sk_buff *skb) 577 { 578 } 579 580 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 581 struct sk_buff *skb, 582 struct sk_buff *skb2) 583 { 584 } 585 static inline bool br_multicast_is_router(struct net_bridge *br) 586 { 587 return 0; 588 } 589 static inline bool br_multicast_querier_exists(struct net_bridge *br, 590 struct ethhdr *eth) 591 { 592 return false; 593 } 594 static inline void br_mdb_init(void) 595 { 596 } 597 static inline void br_mdb_uninit(void) 598 { 599 } 600 #endif 601 602 /* br_vlan.c */ 603 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 604 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 605 struct sk_buff *skb, u16 *vid); 606 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 607 const struct sk_buff *skb); 608 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 609 struct sk_buff *br_handle_vlan(struct net_bridge *br, 610 const struct net_port_vlans *v, 611 struct sk_buff *skb); 612 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 613 int br_vlan_delete(struct net_bridge *br, u16 vid); 614 void br_vlan_flush(struct net_bridge *br); 615 bool br_vlan_find(struct net_bridge *br, u16 vid); 616 void br_recalculate_fwd_mask(struct net_bridge *br); 617 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 618 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 619 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 620 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 621 int br_vlan_init(struct net_bridge *br); 622 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 623 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 624 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 625 void nbp_vlan_flush(struct net_bridge_port *port); 626 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 627 int nbp_vlan_init(struct net_bridge_port *port); 628 629 static inline struct net_port_vlans *br_get_vlan_info( 630 const struct net_bridge *br) 631 { 632 return rcu_dereference_rtnl(br->vlan_info); 633 } 634 635 static inline struct net_port_vlans *nbp_get_vlan_info( 636 const struct net_bridge_port *p) 637 { 638 return rcu_dereference_rtnl(p->vlan_info); 639 } 640 641 /* Since bridge now depends on 8021Q module, but the time bridge sees the 642 * skb, the vlan tag will always be present if the frame was tagged. 643 */ 644 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 645 { 646 int err = 0; 647 648 if (skb_vlan_tag_present(skb)) 649 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 650 else { 651 *vid = 0; 652 err = -EINVAL; 653 } 654 655 return err; 656 } 657 658 static inline u16 br_get_pvid(const struct net_port_vlans *v) 659 { 660 if (!v) 661 return 0; 662 663 smp_rmb(); 664 return v->pvid; 665 } 666 667 static inline int br_vlan_enabled(struct net_bridge *br) 668 { 669 return br->vlan_enabled; 670 } 671 #else 672 static inline bool br_allowed_ingress(struct net_bridge *br, 673 struct net_port_vlans *v, 674 struct sk_buff *skb, 675 u16 *vid) 676 { 677 return true; 678 } 679 680 static inline bool br_allowed_egress(struct net_bridge *br, 681 const struct net_port_vlans *v, 682 const struct sk_buff *skb) 683 { 684 return true; 685 } 686 687 static inline bool br_should_learn(struct net_bridge_port *p, 688 struct sk_buff *skb, u16 *vid) 689 { 690 return true; 691 } 692 693 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 694 const struct net_port_vlans *v, 695 struct sk_buff *skb) 696 { 697 return skb; 698 } 699 700 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 701 { 702 return -EOPNOTSUPP; 703 } 704 705 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 706 { 707 return -EOPNOTSUPP; 708 } 709 710 static inline void br_vlan_flush(struct net_bridge *br) 711 { 712 } 713 714 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 715 { 716 return false; 717 } 718 719 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 720 { 721 } 722 723 static inline int br_vlan_init(struct net_bridge *br) 724 { 725 return 0; 726 } 727 728 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 729 { 730 return -EOPNOTSUPP; 731 } 732 733 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 734 { 735 return -EOPNOTSUPP; 736 } 737 738 static inline void nbp_vlan_flush(struct net_bridge_port *port) 739 { 740 } 741 742 static inline struct net_port_vlans *br_get_vlan_info( 743 const struct net_bridge *br) 744 { 745 return NULL; 746 } 747 static inline struct net_port_vlans *nbp_get_vlan_info( 748 const struct net_bridge_port *p) 749 { 750 return NULL; 751 } 752 753 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 754 { 755 return false; 756 } 757 758 static inline int nbp_vlan_init(struct net_bridge_port *port) 759 { 760 return 0; 761 } 762 763 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 764 { 765 return 0; 766 } 767 static inline u16 br_get_pvid(const struct net_port_vlans *v) 768 { 769 return 0; 770 } 771 772 static inline int br_vlan_enabled(struct net_bridge *br) 773 { 774 return 0; 775 } 776 777 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 778 unsigned long val) 779 { 780 return -EOPNOTSUPP; 781 } 782 #endif 783 784 struct nf_br_ops { 785 int (*br_dev_xmit_hook)(struct sk_buff *skb); 786 }; 787 extern const struct nf_br_ops __rcu *nf_br_ops; 788 789 /* br_netfilter.c */ 790 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 791 int br_nf_core_init(void); 792 void br_nf_core_fini(void); 793 void br_netfilter_rtable_init(struct net_bridge *); 794 #else 795 static inline int br_nf_core_init(void) { return 0; } 796 static inline void br_nf_core_fini(void) {} 797 #define br_netfilter_rtable_init(x) 798 #endif 799 800 /* br_stp.c */ 801 void br_log_state(const struct net_bridge_port *p); 802 void br_set_state(struct net_bridge_port *p, unsigned int state); 803 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 804 void br_init_port(struct net_bridge_port *p); 805 void br_become_designated_port(struct net_bridge_port *p); 806 807 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 808 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 809 int br_set_hello_time(struct net_bridge *br, unsigned long x); 810 int br_set_max_age(struct net_bridge *br, unsigned long x); 811 812 813 /* br_stp_if.c */ 814 void br_stp_enable_bridge(struct net_bridge *br); 815 void br_stp_disable_bridge(struct net_bridge *br); 816 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 817 void br_stp_enable_port(struct net_bridge_port *p); 818 void br_stp_disable_port(struct net_bridge_port *p); 819 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 820 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 821 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 822 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 823 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 824 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 825 826 /* br_stp_bpdu.c */ 827 struct stp_proto; 828 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 829 struct net_device *dev); 830 831 /* br_stp_timer.c */ 832 void br_stp_timer_init(struct net_bridge *br); 833 void br_stp_port_timer_init(struct net_bridge_port *p); 834 unsigned long br_timer_value(const struct timer_list *timer); 835 836 /* br.c */ 837 #if IS_ENABLED(CONFIG_ATM_LANE) 838 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 839 #endif 840 841 /* br_netlink.c */ 842 extern struct rtnl_link_ops br_link_ops; 843 int br_netlink_init(void); 844 void br_netlink_fini(void); 845 void br_ifinfo_notify(int event, struct net_bridge_port *port); 846 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 847 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 848 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 849 u32 filter_mask, int nlflags); 850 851 #ifdef CONFIG_SYSFS 852 /* br_sysfs_if.c */ 853 extern const struct sysfs_ops brport_sysfs_ops; 854 int br_sysfs_addif(struct net_bridge_port *p); 855 int br_sysfs_renameif(struct net_bridge_port *p); 856 857 /* br_sysfs_br.c */ 858 int br_sysfs_addbr(struct net_device *dev); 859 void br_sysfs_delbr(struct net_device *dev); 860 861 #else 862 863 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 864 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 865 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 866 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 867 #endif /* CONFIG_SYSFS */ 868 869 #endif 870