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 #include <linux/rhashtable.h> 24 25 #define BR_HASH_BITS 8 26 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 27 28 #define BR_HOLD_TIME (1*HZ) 29 30 #define BR_PORT_BITS 10 31 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 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 br_vlan_stats { 81 u64 rx_bytes; 82 u64 rx_packets; 83 u64 tx_bytes; 84 u64 tx_packets; 85 struct u64_stats_sync syncp; 86 }; 87 88 /** 89 * struct net_bridge_vlan - per-vlan entry 90 * 91 * @vnode: rhashtable member 92 * @vid: VLAN id 93 * @flags: bridge vlan flags 94 * @stats: per-cpu VLAN statistics 95 * @br: if MASTER flag set, this points to a bridge struct 96 * @port: if MASTER flag unset, this points to a port struct 97 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 98 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 99 * for this VLAN entry 100 * @vlist: sorted list of VLAN entries 101 * @rcu: used for entry destruction 102 * 103 * This structure is shared between the global per-VLAN entries contained in 104 * the bridge rhashtable and the local per-port per-VLAN entries contained in 105 * the port's rhashtable. The union entries should be interpreted depending on 106 * the entry flags that are set. 107 */ 108 struct net_bridge_vlan { 109 struct rhash_head vnode; 110 u16 vid; 111 u16 flags; 112 struct br_vlan_stats __percpu *stats; 113 union { 114 struct net_bridge *br; 115 struct net_bridge_port *port; 116 }; 117 union { 118 atomic_t refcnt; 119 struct net_bridge_vlan *brvlan; 120 }; 121 struct list_head vlist; 122 123 struct rcu_head rcu; 124 }; 125 126 /** 127 * struct net_bridge_vlan_group 128 * 129 * @vlan_hash: VLAN entry rhashtable 130 * @vlan_list: sorted VLAN entry list 131 * @num_vlans: number of total VLAN entries 132 * @pvid: PVID VLAN id 133 * 134 * IMPORTANT: Be careful when checking if there're VLAN entries using list 135 * primitives because the bridge can have entries in its list which 136 * are just for global context but not for filtering, i.e. they have 137 * the master flag set but not the brentry flag. If you have to check 138 * if there're "real" entries in the bridge please test @num_vlans 139 */ 140 struct net_bridge_vlan_group { 141 struct rhashtable vlan_hash; 142 struct list_head vlan_list; 143 u16 num_vlans; 144 u16 pvid; 145 }; 146 147 struct net_bridge_fdb_entry 148 { 149 struct hlist_node hlist; 150 struct net_bridge_port *dst; 151 152 unsigned long updated; 153 unsigned long used; 154 mac_addr addr; 155 __u16 vlan_id; 156 unsigned char is_local:1, 157 is_static:1, 158 added_by_user:1, 159 added_by_external_learn:1; 160 struct rcu_head rcu; 161 }; 162 163 #define MDB_PG_FLAGS_PERMANENT BIT(0) 164 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 165 166 struct net_bridge_port_group { 167 struct net_bridge_port *port; 168 struct net_bridge_port_group __rcu *next; 169 struct hlist_node mglist; 170 struct rcu_head rcu; 171 struct timer_list timer; 172 struct br_ip addr; 173 unsigned char flags; 174 }; 175 176 struct net_bridge_mdb_entry 177 { 178 struct hlist_node hlist[2]; 179 struct net_bridge *br; 180 struct net_bridge_port_group __rcu *ports; 181 struct rcu_head rcu; 182 struct timer_list timer; 183 struct br_ip addr; 184 bool mglist; 185 }; 186 187 struct net_bridge_mdb_htable 188 { 189 struct hlist_head *mhash; 190 struct rcu_head rcu; 191 struct net_bridge_mdb_htable *old; 192 u32 size; 193 u32 max; 194 u32 secret; 195 u32 ver; 196 }; 197 198 struct net_bridge_port 199 { 200 struct net_bridge *br; 201 struct net_device *dev; 202 struct list_head list; 203 204 /* STP */ 205 u8 priority; 206 u8 state; 207 u16 port_no; 208 unsigned char topology_change_ack; 209 unsigned char config_pending; 210 port_id port_id; 211 port_id designated_port; 212 bridge_id designated_root; 213 bridge_id designated_bridge; 214 u32 path_cost; 215 u32 designated_cost; 216 unsigned long designated_age; 217 218 struct timer_list forward_delay_timer; 219 struct timer_list hold_timer; 220 struct timer_list message_age_timer; 221 struct kobject kobj; 222 struct rcu_head rcu; 223 224 unsigned long flags; 225 226 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 227 struct bridge_mcast_own_query ip4_own_query; 228 #if IS_ENABLED(CONFIG_IPV6) 229 struct bridge_mcast_own_query ip6_own_query; 230 #endif /* IS_ENABLED(CONFIG_IPV6) */ 231 unsigned char multicast_router; 232 struct timer_list multicast_router_timer; 233 struct hlist_head mglist; 234 struct hlist_node rlist; 235 #endif 236 237 #ifdef CONFIG_SYSFS 238 char sysfs_name[IFNAMSIZ]; 239 #endif 240 241 #ifdef CONFIG_NET_POLL_CONTROLLER 242 struct netpoll *np; 243 #endif 244 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 245 struct net_bridge_vlan_group __rcu *vlgrp; 246 #endif 247 }; 248 249 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 250 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 251 252 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 253 254 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 255 { 256 return rcu_dereference(dev->rx_handler_data); 257 } 258 259 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 260 { 261 return br_port_exists(dev) ? 262 rtnl_dereference(dev->rx_handler_data) : NULL; 263 } 264 265 struct net_bridge 266 { 267 spinlock_t lock; 268 struct list_head port_list; 269 struct net_device *dev; 270 271 struct pcpu_sw_netstats __percpu *stats; 272 spinlock_t hash_lock; 273 struct hlist_head hash[BR_HASH_SIZE]; 274 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 275 union { 276 struct rtable fake_rtable; 277 struct rt6_info fake_rt6_info; 278 }; 279 bool nf_call_iptables; 280 bool nf_call_ip6tables; 281 bool nf_call_arptables; 282 #endif 283 u16 group_fwd_mask; 284 u16 group_fwd_mask_required; 285 286 /* STP */ 287 bridge_id designated_root; 288 bridge_id bridge_id; 289 u32 root_path_cost; 290 unsigned long max_age; 291 unsigned long hello_time; 292 unsigned long forward_delay; 293 unsigned long bridge_max_age; 294 unsigned long ageing_time; 295 unsigned long bridge_hello_time; 296 unsigned long bridge_forward_delay; 297 298 u8 group_addr[ETH_ALEN]; 299 bool group_addr_set; 300 u16 root_port; 301 302 enum { 303 BR_NO_STP, /* no spanning tree */ 304 BR_KERNEL_STP, /* old STP in kernel */ 305 BR_USER_STP, /* new RSTP in userspace */ 306 } stp_enabled; 307 308 unsigned char topology_change; 309 unsigned char topology_change_detected; 310 311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 312 unsigned char multicast_router; 313 314 u8 multicast_disabled:1; 315 u8 multicast_querier:1; 316 u8 multicast_query_use_ifaddr:1; 317 318 u32 hash_elasticity; 319 u32 hash_max; 320 321 u32 multicast_last_member_count; 322 u32 multicast_startup_query_count; 323 324 unsigned long multicast_last_member_interval; 325 unsigned long multicast_membership_interval; 326 unsigned long multicast_querier_interval; 327 unsigned long multicast_query_interval; 328 unsigned long multicast_query_response_interval; 329 unsigned long multicast_startup_query_interval; 330 331 spinlock_t multicast_lock; 332 struct net_bridge_mdb_htable __rcu *mdb; 333 struct hlist_head router_list; 334 335 struct timer_list multicast_router_timer; 336 struct bridge_mcast_other_query ip4_other_query; 337 struct bridge_mcast_own_query ip4_own_query; 338 struct bridge_mcast_querier ip4_querier; 339 #if IS_ENABLED(CONFIG_IPV6) 340 struct bridge_mcast_other_query ip6_other_query; 341 struct bridge_mcast_own_query ip6_own_query; 342 struct bridge_mcast_querier ip6_querier; 343 #endif /* IS_ENABLED(CONFIG_IPV6) */ 344 #endif 345 346 struct timer_list hello_timer; 347 struct timer_list tcn_timer; 348 struct timer_list topology_change_timer; 349 struct timer_list gc_timer; 350 struct kobject *ifobj; 351 u32 auto_cnt; 352 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 353 struct net_bridge_vlan_group __rcu *vlgrp; 354 u8 vlan_enabled; 355 u8 vlan_stats_enabled; 356 __be16 vlan_proto; 357 u16 default_pvid; 358 #endif 359 }; 360 361 struct br_input_skb_cb { 362 struct net_device *brdev; 363 364 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 365 int igmp; 366 int mrouters_only; 367 #endif 368 369 bool proxyarp_replied; 370 371 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 372 bool vlan_filtered; 373 #endif 374 }; 375 376 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 377 378 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 379 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 380 #else 381 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 382 #endif 383 384 #define br_printk(level, br, format, args...) \ 385 printk(level "%s: " format, (br)->dev->name, ##args) 386 387 #define br_err(__br, format, args...) \ 388 br_printk(KERN_ERR, __br, format, ##args) 389 #define br_warn(__br, format, args...) \ 390 br_printk(KERN_WARNING, __br, format, ##args) 391 #define br_notice(__br, format, args...) \ 392 br_printk(KERN_NOTICE, __br, format, ##args) 393 #define br_info(__br, format, args...) \ 394 br_printk(KERN_INFO, __br, format, ##args) 395 396 #define br_debug(br, format, args...) \ 397 pr_debug("%s: " format, (br)->dev->name, ##args) 398 399 /* called under bridge lock */ 400 static inline int br_is_root_bridge(const struct net_bridge *br) 401 { 402 return !memcmp(&br->bridge_id, &br->designated_root, 8); 403 } 404 405 /* check if a VLAN entry is global */ 406 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 407 { 408 return v->flags & BRIDGE_VLAN_INFO_MASTER; 409 } 410 411 /* check if a VLAN entry is used by the bridge */ 412 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 413 { 414 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 415 } 416 417 /* check if we should use the vlan entry, returns false if it's only context */ 418 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 419 { 420 if (br_vlan_is_master(v)) { 421 if (br_vlan_is_brentry(v)) 422 return true; 423 else 424 return false; 425 } 426 427 return true; 428 } 429 430 /* br_device.c */ 431 void br_dev_setup(struct net_device *dev); 432 void br_dev_delete(struct net_device *dev, struct list_head *list); 433 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 434 #ifdef CONFIG_NET_POLL_CONTROLLER 435 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 436 struct sk_buff *skb) 437 { 438 struct netpoll *np = p->np; 439 440 if (np) 441 netpoll_send_skb(np, skb); 442 } 443 444 int br_netpoll_enable(struct net_bridge_port *p); 445 void br_netpoll_disable(struct net_bridge_port *p); 446 #else 447 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 448 struct sk_buff *skb) 449 { 450 } 451 452 static inline int br_netpoll_enable(struct net_bridge_port *p) 453 { 454 return 0; 455 } 456 457 static inline void br_netpoll_disable(struct net_bridge_port *p) 458 { 459 } 460 #endif 461 462 /* br_fdb.c */ 463 int br_fdb_init(void); 464 void br_fdb_fini(void); 465 void br_fdb_flush(struct net_bridge *br); 466 void br_fdb_find_delete_local(struct net_bridge *br, 467 const struct net_bridge_port *p, 468 const unsigned char *addr, u16 vid); 469 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 470 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 471 void br_fdb_cleanup(unsigned long arg); 472 void br_fdb_delete_by_port(struct net_bridge *br, 473 const struct net_bridge_port *p, u16 vid, int do_all); 474 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 475 const unsigned char *addr, __u16 vid); 476 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 477 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 478 unsigned long off); 479 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 480 const unsigned char *addr, u16 vid); 481 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 482 const unsigned char *addr, u16 vid, bool added_by_user); 483 484 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 485 struct net_device *dev, const unsigned char *addr, u16 vid); 486 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 487 const unsigned char *addr, u16 vid, u16 nlh_flags); 488 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 489 struct net_device *dev, struct net_device *fdev, int idx); 490 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 491 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 492 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 493 const unsigned char *addr, u16 vid); 494 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 495 const unsigned char *addr, u16 vid); 496 497 /* br_forward.c */ 498 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 499 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 500 void br_forward(const struct net_bridge_port *to, 501 struct sk_buff *skb, struct sk_buff *skb0); 502 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 503 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 504 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 505 struct sk_buff *skb2, bool unicast); 506 507 /* br_if.c */ 508 void br_port_carrier_check(struct net_bridge_port *p); 509 int br_add_bridge(struct net *net, const char *name); 510 int br_del_bridge(struct net *net, const char *name); 511 int br_add_if(struct net_bridge *br, struct net_device *dev); 512 int br_del_if(struct net_bridge *br, struct net_device *dev); 513 int br_min_mtu(const struct net_bridge *br); 514 netdev_features_t br_features_recompute(struct net_bridge *br, 515 netdev_features_t features); 516 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 517 void br_manage_promisc(struct net_bridge *br); 518 519 /* br_input.c */ 520 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 521 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 522 523 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 524 { 525 return rcu_dereference(dev->rx_handler) == br_handle_frame; 526 } 527 528 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 529 { 530 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 531 } 532 533 /* br_ioctl.c */ 534 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 535 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 536 void __user *arg); 537 538 /* br_multicast.c */ 539 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 540 extern unsigned int br_mdb_rehash_seq; 541 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 542 struct sk_buff *skb, u16 vid); 543 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 544 struct sk_buff *skb, u16 vid); 545 void br_multicast_add_port(struct net_bridge_port *port); 546 void br_multicast_del_port(struct net_bridge_port *port); 547 void br_multicast_enable_port(struct net_bridge_port *port); 548 void br_multicast_disable_port(struct net_bridge_port *port); 549 void br_multicast_init(struct net_bridge *br); 550 void br_multicast_open(struct net_bridge *br); 551 void br_multicast_stop(struct net_bridge *br); 552 void br_multicast_dev_del(struct net_bridge *br); 553 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 554 struct sk_buff *skb); 555 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 556 struct sk_buff *skb, struct sk_buff *skb2); 557 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 558 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 559 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 560 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 561 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 562 struct net_bridge_mdb_entry * 563 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 564 struct net_bridge_mdb_entry * 565 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 566 struct br_ip *group); 567 void br_multicast_free_pg(struct rcu_head *head); 568 struct net_bridge_port_group * 569 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 570 struct net_bridge_port_group __rcu *next, 571 unsigned char flags); 572 void br_mdb_init(void); 573 void br_mdb_uninit(void); 574 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 575 struct br_ip *group, int type, u8 flags); 576 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 577 int type); 578 579 #define mlock_dereference(X, br) \ 580 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 581 582 static inline bool br_multicast_is_router(struct net_bridge *br) 583 { 584 return br->multicast_router == 2 || 585 (br->multicast_router == 1 && 586 timer_pending(&br->multicast_router_timer)); 587 } 588 589 static inline bool 590 __br_multicast_querier_exists(struct net_bridge *br, 591 struct bridge_mcast_other_query *querier) 592 { 593 return time_is_before_jiffies(querier->delay_time) && 594 (br->multicast_querier || timer_pending(&querier->timer)); 595 } 596 597 static inline bool br_multicast_querier_exists(struct net_bridge *br, 598 struct ethhdr *eth) 599 { 600 switch (eth->h_proto) { 601 case (htons(ETH_P_IP)): 602 return __br_multicast_querier_exists(br, &br->ip4_other_query); 603 #if IS_ENABLED(CONFIG_IPV6) 604 case (htons(ETH_P_IPV6)): 605 return __br_multicast_querier_exists(br, &br->ip6_other_query); 606 #endif 607 default: 608 return false; 609 } 610 } 611 #else 612 static inline int br_multicast_rcv(struct net_bridge *br, 613 struct net_bridge_port *port, 614 struct sk_buff *skb, 615 u16 vid) 616 { 617 return 0; 618 } 619 620 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 621 struct sk_buff *skb, u16 vid) 622 { 623 return NULL; 624 } 625 626 static inline void br_multicast_add_port(struct net_bridge_port *port) 627 { 628 } 629 630 static inline void br_multicast_del_port(struct net_bridge_port *port) 631 { 632 } 633 634 static inline void br_multicast_enable_port(struct net_bridge_port *port) 635 { 636 } 637 638 static inline void br_multicast_disable_port(struct net_bridge_port *port) 639 { 640 } 641 642 static inline void br_multicast_init(struct net_bridge *br) 643 { 644 } 645 646 static inline void br_multicast_open(struct net_bridge *br) 647 { 648 } 649 650 static inline void br_multicast_stop(struct net_bridge *br) 651 { 652 } 653 654 static inline void br_multicast_dev_del(struct net_bridge *br) 655 { 656 } 657 658 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 659 struct sk_buff *skb) 660 { 661 } 662 663 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 664 struct sk_buff *skb, 665 struct sk_buff *skb2) 666 { 667 } 668 static inline bool br_multicast_is_router(struct net_bridge *br) 669 { 670 return 0; 671 } 672 static inline bool br_multicast_querier_exists(struct net_bridge *br, 673 struct ethhdr *eth) 674 { 675 return false; 676 } 677 static inline void br_mdb_init(void) 678 { 679 } 680 static inline void br_mdb_uninit(void) 681 { 682 } 683 #endif 684 685 /* br_vlan.c */ 686 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 687 bool br_allowed_ingress(const struct net_bridge *br, 688 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 689 u16 *vid); 690 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 691 const struct sk_buff *skb); 692 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 693 struct sk_buff *br_handle_vlan(struct net_bridge *br, 694 struct net_bridge_vlan_group *vg, 695 struct sk_buff *skb); 696 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 697 int br_vlan_delete(struct net_bridge *br, u16 vid); 698 void br_vlan_flush(struct net_bridge *br); 699 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 700 void br_recalculate_fwd_mask(struct net_bridge *br); 701 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 702 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 703 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 704 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 705 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 706 int br_vlan_init(struct net_bridge *br); 707 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 708 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 709 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 710 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 711 void nbp_vlan_flush(struct net_bridge_port *port); 712 int nbp_vlan_init(struct net_bridge_port *port); 713 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 714 void br_vlan_get_stats(const struct net_bridge_vlan *v, 715 struct br_vlan_stats *stats); 716 717 static inline struct net_bridge_vlan_group *br_vlan_group( 718 const struct net_bridge *br) 719 { 720 return rtnl_dereference(br->vlgrp); 721 } 722 723 static inline struct net_bridge_vlan_group *nbp_vlan_group( 724 const struct net_bridge_port *p) 725 { 726 return rtnl_dereference(p->vlgrp); 727 } 728 729 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 730 const struct net_bridge *br) 731 { 732 return rcu_dereference(br->vlgrp); 733 } 734 735 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 736 const struct net_bridge_port *p) 737 { 738 return rcu_dereference(p->vlgrp); 739 } 740 741 /* Since bridge now depends on 8021Q module, but the time bridge sees the 742 * skb, the vlan tag will always be present if the frame was tagged. 743 */ 744 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 745 { 746 int err = 0; 747 748 if (skb_vlan_tag_present(skb)) { 749 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 750 } else { 751 *vid = 0; 752 err = -EINVAL; 753 } 754 755 return err; 756 } 757 758 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 759 { 760 if (!vg) 761 return 0; 762 763 smp_rmb(); 764 return vg->pvid; 765 } 766 767 static inline int br_vlan_enabled(struct net_bridge *br) 768 { 769 return br->vlan_enabled; 770 } 771 #else 772 static inline bool br_allowed_ingress(const struct net_bridge *br, 773 struct net_bridge_vlan_group *vg, 774 struct sk_buff *skb, 775 u16 *vid) 776 { 777 return true; 778 } 779 780 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 781 const struct sk_buff *skb) 782 { 783 return true; 784 } 785 786 static inline bool br_should_learn(struct net_bridge_port *p, 787 struct sk_buff *skb, u16 *vid) 788 { 789 return true; 790 } 791 792 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 793 struct net_bridge_vlan_group *vg, 794 struct sk_buff *skb) 795 { 796 return skb; 797 } 798 799 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 800 { 801 return -EOPNOTSUPP; 802 } 803 804 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 805 { 806 return -EOPNOTSUPP; 807 } 808 809 static inline void br_vlan_flush(struct net_bridge *br) 810 { 811 } 812 813 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 814 { 815 } 816 817 static inline int br_vlan_init(struct net_bridge *br) 818 { 819 return 0; 820 } 821 822 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 823 { 824 return -EOPNOTSUPP; 825 } 826 827 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 828 { 829 return -EOPNOTSUPP; 830 } 831 832 static inline void nbp_vlan_flush(struct net_bridge_port *port) 833 { 834 } 835 836 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 837 u16 vid) 838 { 839 return NULL; 840 } 841 842 static inline int nbp_vlan_init(struct net_bridge_port *port) 843 { 844 return 0; 845 } 846 847 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 848 { 849 return 0; 850 } 851 852 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 853 { 854 return 0; 855 } 856 857 static inline int br_vlan_enabled(struct net_bridge *br) 858 { 859 return 0; 860 } 861 862 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 863 unsigned long val) 864 { 865 return -EOPNOTSUPP; 866 } 867 868 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 869 u32 filter_mask) 870 { 871 return 0; 872 } 873 874 static inline struct net_bridge_vlan_group *br_vlan_group( 875 const struct net_bridge *br) 876 { 877 return NULL; 878 } 879 880 static inline struct net_bridge_vlan_group *nbp_vlan_group( 881 const struct net_bridge_port *p) 882 { 883 return NULL; 884 } 885 886 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 887 const struct net_bridge *br) 888 { 889 return NULL; 890 } 891 892 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 893 const struct net_bridge_port *p) 894 { 895 return NULL; 896 } 897 898 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 899 struct br_vlan_stats *stats) 900 { 901 } 902 #endif 903 904 struct nf_br_ops { 905 int (*br_dev_xmit_hook)(struct sk_buff *skb); 906 }; 907 extern const struct nf_br_ops __rcu *nf_br_ops; 908 909 /* br_netfilter.c */ 910 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 911 int br_nf_core_init(void); 912 void br_nf_core_fini(void); 913 void br_netfilter_rtable_init(struct net_bridge *); 914 #else 915 static inline int br_nf_core_init(void) { return 0; } 916 static inline void br_nf_core_fini(void) {} 917 #define br_netfilter_rtable_init(x) 918 #endif 919 920 /* br_stp.c */ 921 void br_set_state(struct net_bridge_port *p, unsigned int state); 922 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 923 void br_init_port(struct net_bridge_port *p); 924 void br_become_designated_port(struct net_bridge_port *p); 925 926 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 927 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 928 int br_set_hello_time(struct net_bridge *br, unsigned long x); 929 int br_set_max_age(struct net_bridge *br, unsigned long x); 930 int br_set_ageing_time(struct net_bridge *br, u32 ageing_time); 931 932 933 /* br_stp_if.c */ 934 void br_stp_enable_bridge(struct net_bridge *br); 935 void br_stp_disable_bridge(struct net_bridge *br); 936 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 937 void br_stp_enable_port(struct net_bridge_port *p); 938 void br_stp_disable_port(struct net_bridge_port *p); 939 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 940 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 941 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 942 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 943 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 944 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 945 946 /* br_stp_bpdu.c */ 947 struct stp_proto; 948 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 949 struct net_device *dev); 950 951 /* br_stp_timer.c */ 952 void br_stp_timer_init(struct net_bridge *br); 953 void br_stp_port_timer_init(struct net_bridge_port *p); 954 unsigned long br_timer_value(const struct timer_list *timer); 955 956 /* br.c */ 957 #if IS_ENABLED(CONFIG_ATM_LANE) 958 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 959 #endif 960 961 /* br_netlink.c */ 962 extern struct rtnl_link_ops br_link_ops; 963 int br_netlink_init(void); 964 void br_netlink_fini(void); 965 void br_ifinfo_notify(int event, struct net_bridge_port *port); 966 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 967 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 968 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 969 u32 filter_mask, int nlflags); 970 971 #ifdef CONFIG_SYSFS 972 /* br_sysfs_if.c */ 973 extern const struct sysfs_ops brport_sysfs_ops; 974 int br_sysfs_addif(struct net_bridge_port *p); 975 int br_sysfs_renameif(struct net_bridge_port *p); 976 977 /* br_sysfs_br.c */ 978 int br_sysfs_addbr(struct net_device *dev); 979 void br_sysfs_delbr(struct net_device *dev); 980 981 #else 982 983 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 984 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 985 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 986 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 987 #endif /* CONFIG_SYSFS */ 988 989 #endif 990