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:1, 102 is_static:1, 103 added_by_user:1, 104 added_by_external_learn:1; 105 __u16 vlan_id; 106 }; 107 108 struct net_bridge_port_group { 109 struct net_bridge_port *port; 110 struct net_bridge_port_group __rcu *next; 111 struct hlist_node mglist; 112 struct rcu_head rcu; 113 struct timer_list timer; 114 struct br_ip addr; 115 unsigned char state; 116 }; 117 118 struct net_bridge_mdb_entry 119 { 120 struct hlist_node hlist[2]; 121 struct net_bridge *br; 122 struct net_bridge_port_group __rcu *ports; 123 struct rcu_head rcu; 124 struct timer_list timer; 125 struct br_ip addr; 126 bool mglist; 127 }; 128 129 struct net_bridge_mdb_htable 130 { 131 struct hlist_head *mhash; 132 struct rcu_head rcu; 133 struct net_bridge_mdb_htable *old; 134 u32 size; 135 u32 max; 136 u32 secret; 137 u32 ver; 138 }; 139 140 struct net_bridge_port 141 { 142 struct net_bridge *br; 143 struct net_device *dev; 144 struct list_head list; 145 146 /* STP */ 147 u8 priority; 148 u8 state; 149 u16 port_no; 150 unsigned char topology_change_ack; 151 unsigned char config_pending; 152 port_id port_id; 153 port_id designated_port; 154 bridge_id designated_root; 155 bridge_id designated_bridge; 156 u32 path_cost; 157 u32 designated_cost; 158 unsigned long designated_age; 159 160 struct timer_list forward_delay_timer; 161 struct timer_list hold_timer; 162 struct timer_list message_age_timer; 163 struct kobject kobj; 164 struct rcu_head rcu; 165 166 unsigned long flags; 167 #define BR_HAIRPIN_MODE 0x00000001 168 #define BR_BPDU_GUARD 0x00000002 169 #define BR_ROOT_BLOCK 0x00000004 170 #define BR_MULTICAST_FAST_LEAVE 0x00000008 171 #define BR_ADMIN_COST 0x00000010 172 #define BR_LEARNING 0x00000020 173 #define BR_FLOOD 0x00000040 174 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 175 #define BR_PROMISC 0x00000080 176 #define BR_PROXYARP 0x00000100 177 178 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 179 struct bridge_mcast_own_query ip4_own_query; 180 #if IS_ENABLED(CONFIG_IPV6) 181 struct bridge_mcast_own_query ip6_own_query; 182 #endif /* IS_ENABLED(CONFIG_IPV6) */ 183 unsigned char multicast_router; 184 struct timer_list multicast_router_timer; 185 struct hlist_head mglist; 186 struct hlist_node rlist; 187 #endif 188 189 #ifdef CONFIG_SYSFS 190 char sysfs_name[IFNAMSIZ]; 191 #endif 192 193 #ifdef CONFIG_NET_POLL_CONTROLLER 194 struct netpoll *np; 195 #endif 196 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 197 struct net_port_vlans __rcu *vlan_info; 198 #endif 199 }; 200 201 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 202 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 203 204 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 205 206 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 207 { 208 return rcu_dereference(dev->rx_handler_data); 209 } 210 211 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 212 { 213 return br_port_exists(dev) ? 214 rtnl_dereference(dev->rx_handler_data) : NULL; 215 } 216 217 struct net_bridge 218 { 219 spinlock_t lock; 220 struct list_head port_list; 221 struct net_device *dev; 222 223 struct pcpu_sw_netstats __percpu *stats; 224 spinlock_t hash_lock; 225 struct hlist_head hash[BR_HASH_SIZE]; 226 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 227 struct rtable fake_rtable; 228 bool nf_call_iptables; 229 bool nf_call_ip6tables; 230 bool nf_call_arptables; 231 #endif 232 u16 group_fwd_mask; 233 u16 group_fwd_mask_required; 234 235 /* STP */ 236 bridge_id designated_root; 237 bridge_id bridge_id; 238 u32 root_path_cost; 239 unsigned long max_age; 240 unsigned long hello_time; 241 unsigned long forward_delay; 242 unsigned long bridge_max_age; 243 unsigned long ageing_time; 244 unsigned long bridge_hello_time; 245 unsigned long bridge_forward_delay; 246 247 u8 group_addr[ETH_ALEN]; 248 bool group_addr_set; 249 u16 root_port; 250 251 enum { 252 BR_NO_STP, /* no spanning tree */ 253 BR_KERNEL_STP, /* old STP in kernel */ 254 BR_USER_STP, /* new RSTP in userspace */ 255 } stp_enabled; 256 257 unsigned char topology_change; 258 unsigned char topology_change_detected; 259 260 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 261 unsigned char multicast_router; 262 263 u8 multicast_disabled:1; 264 u8 multicast_querier:1; 265 u8 multicast_query_use_ifaddr:1; 266 267 u32 hash_elasticity; 268 u32 hash_max; 269 270 u32 multicast_last_member_count; 271 u32 multicast_startup_query_count; 272 273 unsigned long multicast_last_member_interval; 274 unsigned long multicast_membership_interval; 275 unsigned long multicast_querier_interval; 276 unsigned long multicast_query_interval; 277 unsigned long multicast_query_response_interval; 278 unsigned long multicast_startup_query_interval; 279 280 spinlock_t multicast_lock; 281 struct net_bridge_mdb_htable __rcu *mdb; 282 struct hlist_head router_list; 283 284 struct timer_list multicast_router_timer; 285 struct bridge_mcast_other_query ip4_other_query; 286 struct bridge_mcast_own_query ip4_own_query; 287 struct bridge_mcast_querier ip4_querier; 288 #if IS_ENABLED(CONFIG_IPV6) 289 struct bridge_mcast_other_query ip6_other_query; 290 struct bridge_mcast_own_query ip6_own_query; 291 struct bridge_mcast_querier ip6_querier; 292 #endif /* IS_ENABLED(CONFIG_IPV6) */ 293 #endif 294 295 struct timer_list hello_timer; 296 struct timer_list tcn_timer; 297 struct timer_list topology_change_timer; 298 struct timer_list gc_timer; 299 struct kobject *ifobj; 300 u32 auto_cnt; 301 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 302 u8 vlan_enabled; 303 __be16 vlan_proto; 304 u16 default_pvid; 305 struct net_port_vlans __rcu *vlan_info; 306 #endif 307 }; 308 309 struct br_input_skb_cb { 310 struct net_device *brdev; 311 312 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 313 int igmp; 314 int mrouters_only; 315 #endif 316 317 u16 frag_max_size; 318 319 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 320 bool vlan_filtered; 321 #endif 322 }; 323 324 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 325 326 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 327 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 328 #else 329 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 330 #endif 331 332 #define br_printk(level, br, format, args...) \ 333 printk(level "%s: " format, (br)->dev->name, ##args) 334 335 #define br_err(__br, format, args...) \ 336 br_printk(KERN_ERR, __br, format, ##args) 337 #define br_warn(__br, format, args...) \ 338 br_printk(KERN_WARNING, __br, format, ##args) 339 #define br_notice(__br, format, args...) \ 340 br_printk(KERN_NOTICE, __br, format, ##args) 341 #define br_info(__br, format, args...) \ 342 br_printk(KERN_INFO, __br, format, ##args) 343 344 #define br_debug(br, format, args...) \ 345 pr_debug("%s: " format, (br)->dev->name, ##args) 346 347 /* called under bridge lock */ 348 static inline int br_is_root_bridge(const struct net_bridge *br) 349 { 350 return !memcmp(&br->bridge_id, &br->designated_root, 8); 351 } 352 353 /* br_device.c */ 354 void br_dev_setup(struct net_device *dev); 355 void br_dev_delete(struct net_device *dev, struct list_head *list); 356 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 357 #ifdef CONFIG_NET_POLL_CONTROLLER 358 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 359 struct sk_buff *skb) 360 { 361 struct netpoll *np = p->np; 362 363 if (np) 364 netpoll_send_skb(np, skb); 365 } 366 367 int br_netpoll_enable(struct net_bridge_port *p); 368 void br_netpoll_disable(struct net_bridge_port *p); 369 #else 370 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 371 struct sk_buff *skb) 372 { 373 } 374 375 static inline int br_netpoll_enable(struct net_bridge_port *p) 376 { 377 return 0; 378 } 379 380 static inline void br_netpoll_disable(struct net_bridge_port *p) 381 { 382 } 383 #endif 384 385 /* br_fdb.c */ 386 int br_fdb_init(void); 387 void br_fdb_fini(void); 388 void br_fdb_flush(struct net_bridge *br); 389 void br_fdb_find_delete_local(struct net_bridge *br, 390 const struct net_bridge_port *p, 391 const unsigned char *addr, u16 vid); 392 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 393 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 394 void br_fdb_cleanup(unsigned long arg); 395 void br_fdb_delete_by_port(struct net_bridge *br, 396 const struct net_bridge_port *p, int do_all); 397 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 398 const unsigned char *addr, __u16 vid); 399 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 400 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 401 unsigned long off); 402 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 403 const unsigned char *addr, u16 vid); 404 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 405 const unsigned char *addr, u16 vid, bool added_by_user); 406 407 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 408 struct net_device *dev, const unsigned char *addr, u16 vid); 409 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 410 const unsigned char *addr, u16 vid, u16 nlh_flags); 411 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 412 struct net_device *dev, struct net_device *fdev, int idx); 413 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 414 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 415 416 /* br_forward.c */ 417 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 418 int br_dev_queue_push_xmit(struct sk_buff *skb); 419 void br_forward(const struct net_bridge_port *to, 420 struct sk_buff *skb, struct sk_buff *skb0); 421 int br_forward_finish(struct sk_buff *skb); 422 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 423 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 424 struct sk_buff *skb2, bool unicast); 425 426 /* br_if.c */ 427 void br_port_carrier_check(struct net_bridge_port *p); 428 int br_add_bridge(struct net *net, const char *name); 429 int br_del_bridge(struct net *net, const char *name); 430 int br_add_if(struct net_bridge *br, struct net_device *dev); 431 int br_del_if(struct net_bridge *br, struct net_device *dev); 432 int br_min_mtu(const struct net_bridge *br); 433 netdev_features_t br_features_recompute(struct net_bridge *br, 434 netdev_features_t features); 435 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 436 void br_manage_promisc(struct net_bridge *br); 437 438 /* br_input.c */ 439 int br_handle_frame_finish(struct sk_buff *skb); 440 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 441 442 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 443 { 444 return rcu_dereference(dev->rx_handler) == br_handle_frame; 445 } 446 447 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 448 { 449 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 450 } 451 452 /* br_ioctl.c */ 453 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 454 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 455 void __user *arg); 456 457 /* br_multicast.c */ 458 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 459 extern unsigned int br_mdb_rehash_seq; 460 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 461 struct sk_buff *skb, u16 vid); 462 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 463 struct sk_buff *skb, u16 vid); 464 void br_multicast_add_port(struct net_bridge_port *port); 465 void br_multicast_del_port(struct net_bridge_port *port); 466 void br_multicast_enable_port(struct net_bridge_port *port); 467 void br_multicast_disable_port(struct net_bridge_port *port); 468 void br_multicast_init(struct net_bridge *br); 469 void br_multicast_open(struct net_bridge *br); 470 void br_multicast_stop(struct net_bridge *br); 471 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 472 struct sk_buff *skb); 473 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 474 struct sk_buff *skb, struct sk_buff *skb2); 475 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 476 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 477 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 478 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 479 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 480 struct net_bridge_mdb_entry * 481 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 482 struct net_bridge_mdb_entry * 483 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 484 struct br_ip *group); 485 void br_multicast_free_pg(struct rcu_head *head); 486 struct net_bridge_port_group * 487 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 488 struct net_bridge_port_group __rcu *next, 489 unsigned char state); 490 void br_mdb_init(void); 491 void br_mdb_uninit(void); 492 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 493 struct br_ip *group, int type); 494 495 #define mlock_dereference(X, br) \ 496 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 497 498 static inline bool br_multicast_is_router(struct net_bridge *br) 499 { 500 return br->multicast_router == 2 || 501 (br->multicast_router == 1 && 502 timer_pending(&br->multicast_router_timer)); 503 } 504 505 static inline bool 506 __br_multicast_querier_exists(struct net_bridge *br, 507 struct bridge_mcast_other_query *querier) 508 { 509 return time_is_before_jiffies(querier->delay_time) && 510 (br->multicast_querier || timer_pending(&querier->timer)); 511 } 512 513 static inline bool br_multicast_querier_exists(struct net_bridge *br, 514 struct ethhdr *eth) 515 { 516 switch (eth->h_proto) { 517 case (htons(ETH_P_IP)): 518 return __br_multicast_querier_exists(br, &br->ip4_other_query); 519 #if IS_ENABLED(CONFIG_IPV6) 520 case (htons(ETH_P_IPV6)): 521 return __br_multicast_querier_exists(br, &br->ip6_other_query); 522 #endif 523 default: 524 return false; 525 } 526 } 527 #else 528 static inline int br_multicast_rcv(struct net_bridge *br, 529 struct net_bridge_port *port, 530 struct sk_buff *skb, 531 u16 vid) 532 { 533 return 0; 534 } 535 536 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 537 struct sk_buff *skb, u16 vid) 538 { 539 return NULL; 540 } 541 542 static inline void br_multicast_add_port(struct net_bridge_port *port) 543 { 544 } 545 546 static inline void br_multicast_del_port(struct net_bridge_port *port) 547 { 548 } 549 550 static inline void br_multicast_enable_port(struct net_bridge_port *port) 551 { 552 } 553 554 static inline void br_multicast_disable_port(struct net_bridge_port *port) 555 { 556 } 557 558 static inline void br_multicast_init(struct net_bridge *br) 559 { 560 } 561 562 static inline void br_multicast_open(struct net_bridge *br) 563 { 564 } 565 566 static inline void br_multicast_stop(struct net_bridge *br) 567 { 568 } 569 570 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 571 struct sk_buff *skb) 572 { 573 } 574 575 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 576 struct sk_buff *skb, 577 struct sk_buff *skb2) 578 { 579 } 580 static inline bool br_multicast_is_router(struct net_bridge *br) 581 { 582 return 0; 583 } 584 static inline bool br_multicast_querier_exists(struct net_bridge *br, 585 struct ethhdr *eth) 586 { 587 return false; 588 } 589 static inline void br_mdb_init(void) 590 { 591 } 592 static inline void br_mdb_uninit(void) 593 { 594 } 595 #endif 596 597 /* br_vlan.c */ 598 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 599 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 600 struct sk_buff *skb, u16 *vid); 601 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 602 const struct sk_buff *skb); 603 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 604 struct sk_buff *br_handle_vlan(struct net_bridge *br, 605 const struct net_port_vlans *v, 606 struct sk_buff *skb); 607 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 608 int br_vlan_delete(struct net_bridge *br, u16 vid); 609 void br_vlan_flush(struct net_bridge *br); 610 bool br_vlan_find(struct net_bridge *br, u16 vid); 611 void br_recalculate_fwd_mask(struct net_bridge *br); 612 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 613 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 614 int br_vlan_init(struct net_bridge *br); 615 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 616 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 617 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 618 void nbp_vlan_flush(struct net_bridge_port *port); 619 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 620 int nbp_vlan_init(struct net_bridge_port *port); 621 622 static inline struct net_port_vlans *br_get_vlan_info( 623 const struct net_bridge *br) 624 { 625 return rcu_dereference_rtnl(br->vlan_info); 626 } 627 628 static inline struct net_port_vlans *nbp_get_vlan_info( 629 const struct net_bridge_port *p) 630 { 631 return rcu_dereference_rtnl(p->vlan_info); 632 } 633 634 /* Since bridge now depends on 8021Q module, but the time bridge sees the 635 * skb, the vlan tag will always be present if the frame was tagged. 636 */ 637 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 638 { 639 int err = 0; 640 641 if (vlan_tx_tag_present(skb)) 642 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK; 643 else { 644 *vid = 0; 645 err = -EINVAL; 646 } 647 648 return err; 649 } 650 651 static inline u16 br_get_pvid(const struct net_port_vlans *v) 652 { 653 if (!v) 654 return 0; 655 656 smp_rmb(); 657 return v->pvid; 658 } 659 660 static inline int br_vlan_enabled(struct net_bridge *br) 661 { 662 return br->vlan_enabled; 663 } 664 #else 665 static inline bool br_allowed_ingress(struct net_bridge *br, 666 struct net_port_vlans *v, 667 struct sk_buff *skb, 668 u16 *vid) 669 { 670 return true; 671 } 672 673 static inline bool br_allowed_egress(struct net_bridge *br, 674 const struct net_port_vlans *v, 675 const struct sk_buff *skb) 676 { 677 return true; 678 } 679 680 static inline bool br_should_learn(struct net_bridge_port *p, 681 struct sk_buff *skb, u16 *vid) 682 { 683 return true; 684 } 685 686 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 687 const struct net_port_vlans *v, 688 struct sk_buff *skb) 689 { 690 return skb; 691 } 692 693 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 694 { 695 return -EOPNOTSUPP; 696 } 697 698 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 699 { 700 return -EOPNOTSUPP; 701 } 702 703 static inline void br_vlan_flush(struct net_bridge *br) 704 { 705 } 706 707 static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 708 { 709 return false; 710 } 711 712 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 713 { 714 } 715 716 static inline int br_vlan_init(struct net_bridge *br) 717 { 718 return 0; 719 } 720 721 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 722 { 723 return -EOPNOTSUPP; 724 } 725 726 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 727 { 728 return -EOPNOTSUPP; 729 } 730 731 static inline void nbp_vlan_flush(struct net_bridge_port *port) 732 { 733 } 734 735 static inline struct net_port_vlans *br_get_vlan_info( 736 const struct net_bridge *br) 737 { 738 return NULL; 739 } 740 static inline struct net_port_vlans *nbp_get_vlan_info( 741 const struct net_bridge_port *p) 742 { 743 return NULL; 744 } 745 746 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 747 { 748 return false; 749 } 750 751 static inline int nbp_vlan_init(struct net_bridge_port *port) 752 { 753 return 0; 754 } 755 756 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 757 { 758 return 0; 759 } 760 static inline u16 br_get_pvid(const struct net_port_vlans *v) 761 { 762 return 0; 763 } 764 765 static inline int br_vlan_enabled(struct net_bridge *br) 766 { 767 return 0; 768 } 769 #endif 770 771 /* br_netfilter.c */ 772 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 773 int br_nf_core_init(void); 774 void br_nf_core_fini(void); 775 void br_netfilter_rtable_init(struct net_bridge *); 776 #else 777 static inline int br_nf_core_init(void) { return 0; } 778 static inline void br_nf_core_fini(void) {} 779 #define br_netfilter_rtable_init(x) 780 #endif 781 782 /* br_stp.c */ 783 void br_log_state(const struct net_bridge_port *p); 784 void br_set_state(struct net_bridge_port *p, unsigned int state); 785 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 786 void br_init_port(struct net_bridge_port *p); 787 void br_become_designated_port(struct net_bridge_port *p); 788 789 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 790 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 791 int br_set_hello_time(struct net_bridge *br, unsigned long x); 792 int br_set_max_age(struct net_bridge *br, unsigned long x); 793 794 795 /* br_stp_if.c */ 796 void br_stp_enable_bridge(struct net_bridge *br); 797 void br_stp_disable_bridge(struct net_bridge *br); 798 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 799 void br_stp_enable_port(struct net_bridge_port *p); 800 void br_stp_disable_port(struct net_bridge_port *p); 801 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 802 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 803 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 804 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 805 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 806 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 807 808 /* br_stp_bpdu.c */ 809 struct stp_proto; 810 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 811 struct net_device *dev); 812 813 /* br_stp_timer.c */ 814 void br_stp_timer_init(struct net_bridge *br); 815 void br_stp_port_timer_init(struct net_bridge_port *p); 816 unsigned long br_timer_value(const struct timer_list *timer); 817 818 /* br.c */ 819 #if IS_ENABLED(CONFIG_ATM_LANE) 820 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 821 #endif 822 823 /* br_netlink.c */ 824 extern struct rtnl_link_ops br_link_ops; 825 int br_netlink_init(void); 826 void br_netlink_fini(void); 827 void br_ifinfo_notify(int event, struct net_bridge_port *port); 828 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg); 829 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg); 830 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 831 u32 filter_mask); 832 833 #ifdef CONFIG_SYSFS 834 /* br_sysfs_if.c */ 835 extern const struct sysfs_ops brport_sysfs_ops; 836 int br_sysfs_addif(struct net_bridge_port *p); 837 int br_sysfs_renameif(struct net_bridge_port *p); 838 839 /* br_sysfs_br.c */ 840 int br_sysfs_addbr(struct net_device *dev); 841 void br_sysfs_delbr(struct net_device *dev); 842 843 #else 844 845 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 846 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 847 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 848 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 849 #endif /* CONFIG_SYSFS */ 850 851 #endif 852