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 79 /* IGMP/MLD statistics */ 80 struct bridge_mcast_stats { 81 struct br_mcast_stats mstats; 82 struct u64_stats_sync syncp; 83 }; 84 #endif 85 86 struct br_vlan_stats { 87 u64 rx_bytes; 88 u64 rx_packets; 89 u64 tx_bytes; 90 u64 tx_packets; 91 struct u64_stats_sync syncp; 92 }; 93 94 /** 95 * struct net_bridge_vlan - per-vlan entry 96 * 97 * @vnode: rhashtable member 98 * @vid: VLAN id 99 * @flags: bridge vlan flags 100 * @stats: per-cpu VLAN statistics 101 * @br: if MASTER flag set, this points to a bridge struct 102 * @port: if MASTER flag unset, this points to a port struct 103 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 104 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 105 * for this VLAN entry 106 * @vlist: sorted list of VLAN entries 107 * @rcu: used for entry destruction 108 * 109 * This structure is shared between the global per-VLAN entries contained in 110 * the bridge rhashtable and the local per-port per-VLAN entries contained in 111 * the port's rhashtable. The union entries should be interpreted depending on 112 * the entry flags that are set. 113 */ 114 struct net_bridge_vlan { 115 struct rhash_head vnode; 116 u16 vid; 117 u16 flags; 118 struct br_vlan_stats __percpu *stats; 119 union { 120 struct net_bridge *br; 121 struct net_bridge_port *port; 122 }; 123 union { 124 atomic_t refcnt; 125 struct net_bridge_vlan *brvlan; 126 }; 127 struct list_head vlist; 128 129 struct rcu_head rcu; 130 }; 131 132 /** 133 * struct net_bridge_vlan_group 134 * 135 * @vlan_hash: VLAN entry rhashtable 136 * @vlan_list: sorted VLAN entry list 137 * @num_vlans: number of total VLAN entries 138 * @pvid: PVID VLAN id 139 * 140 * IMPORTANT: Be careful when checking if there're VLAN entries using list 141 * primitives because the bridge can have entries in its list which 142 * are just for global context but not for filtering, i.e. they have 143 * the master flag set but not the brentry flag. If you have to check 144 * if there're "real" entries in the bridge please test @num_vlans 145 */ 146 struct net_bridge_vlan_group { 147 struct rhashtable vlan_hash; 148 struct list_head vlan_list; 149 u16 num_vlans; 150 u16 pvid; 151 }; 152 153 struct net_bridge_fdb_entry 154 { 155 struct hlist_node hlist; 156 struct net_bridge_port *dst; 157 158 unsigned long updated; 159 unsigned long used; 160 mac_addr addr; 161 __u16 vlan_id; 162 unsigned char is_local:1, 163 is_static:1, 164 added_by_user:1, 165 added_by_external_learn:1; 166 struct rcu_head rcu; 167 }; 168 169 #define MDB_PG_FLAGS_PERMANENT BIT(0) 170 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 171 172 struct net_bridge_port_group { 173 struct net_bridge_port *port; 174 struct net_bridge_port_group __rcu *next; 175 struct hlist_node mglist; 176 struct rcu_head rcu; 177 struct timer_list timer; 178 struct br_ip addr; 179 unsigned char flags; 180 }; 181 182 struct net_bridge_mdb_entry 183 { 184 struct hlist_node hlist[2]; 185 struct net_bridge *br; 186 struct net_bridge_port_group __rcu *ports; 187 struct rcu_head rcu; 188 struct timer_list timer; 189 struct br_ip addr; 190 bool mglist; 191 }; 192 193 struct net_bridge_mdb_htable 194 { 195 struct hlist_head *mhash; 196 struct rcu_head rcu; 197 struct net_bridge_mdb_htable *old; 198 u32 size; 199 u32 max; 200 u32 secret; 201 u32 ver; 202 }; 203 204 struct net_bridge_port 205 { 206 struct net_bridge *br; 207 struct net_device *dev; 208 struct list_head list; 209 210 /* STP */ 211 u8 priority; 212 u8 state; 213 u16 port_no; 214 unsigned char topology_change_ack; 215 unsigned char config_pending; 216 port_id port_id; 217 port_id designated_port; 218 bridge_id designated_root; 219 bridge_id designated_bridge; 220 u32 path_cost; 221 u32 designated_cost; 222 unsigned long designated_age; 223 224 struct timer_list forward_delay_timer; 225 struct timer_list hold_timer; 226 struct timer_list message_age_timer; 227 struct kobject kobj; 228 struct rcu_head rcu; 229 230 unsigned long flags; 231 232 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 233 struct bridge_mcast_own_query ip4_own_query; 234 #if IS_ENABLED(CONFIG_IPV6) 235 struct bridge_mcast_own_query ip6_own_query; 236 #endif /* IS_ENABLED(CONFIG_IPV6) */ 237 unsigned char multicast_router; 238 struct bridge_mcast_stats __percpu *mcast_stats; 239 struct timer_list multicast_router_timer; 240 struct hlist_head mglist; 241 struct hlist_node rlist; 242 #endif 243 244 #ifdef CONFIG_SYSFS 245 char sysfs_name[IFNAMSIZ]; 246 #endif 247 248 #ifdef CONFIG_NET_POLL_CONTROLLER 249 struct netpoll *np; 250 #endif 251 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 252 struct net_bridge_vlan_group __rcu *vlgrp; 253 #endif 254 }; 255 256 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 257 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 258 259 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 260 261 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 262 { 263 return rcu_dereference(dev->rx_handler_data); 264 } 265 266 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 267 { 268 return br_port_exists(dev) ? 269 rtnl_dereference(dev->rx_handler_data) : NULL; 270 } 271 272 struct net_bridge 273 { 274 spinlock_t lock; 275 struct list_head port_list; 276 struct net_device *dev; 277 278 struct pcpu_sw_netstats __percpu *stats; 279 spinlock_t hash_lock; 280 struct hlist_head hash[BR_HASH_SIZE]; 281 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 282 union { 283 struct rtable fake_rtable; 284 struct rt6_info fake_rt6_info; 285 }; 286 bool nf_call_iptables; 287 bool nf_call_ip6tables; 288 bool nf_call_arptables; 289 #endif 290 u16 group_fwd_mask; 291 u16 group_fwd_mask_required; 292 293 /* STP */ 294 bridge_id designated_root; 295 bridge_id bridge_id; 296 u32 root_path_cost; 297 unsigned long max_age; 298 unsigned long hello_time; 299 unsigned long forward_delay; 300 unsigned long bridge_max_age; 301 unsigned long ageing_time; 302 unsigned long bridge_hello_time; 303 unsigned long bridge_forward_delay; 304 305 u8 group_addr[ETH_ALEN]; 306 bool group_addr_set; 307 u16 root_port; 308 309 enum { 310 BR_NO_STP, /* no spanning tree */ 311 BR_KERNEL_STP, /* old STP in kernel */ 312 BR_USER_STP, /* new RSTP in userspace */ 313 } stp_enabled; 314 315 unsigned char topology_change; 316 unsigned char topology_change_detected; 317 318 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 319 unsigned char multicast_router; 320 321 u8 multicast_disabled:1; 322 u8 multicast_querier:1; 323 u8 multicast_query_use_ifaddr:1; 324 u8 has_ipv6_addr:1; 325 u8 multicast_stats_enabled:1; 326 327 u32 hash_elasticity; 328 u32 hash_max; 329 330 u32 multicast_last_member_count; 331 u32 multicast_startup_query_count; 332 333 unsigned long multicast_last_member_interval; 334 unsigned long multicast_membership_interval; 335 unsigned long multicast_querier_interval; 336 unsigned long multicast_query_interval; 337 unsigned long multicast_query_response_interval; 338 unsigned long multicast_startup_query_interval; 339 340 spinlock_t multicast_lock; 341 struct net_bridge_mdb_htable __rcu *mdb; 342 struct hlist_head router_list; 343 344 struct timer_list multicast_router_timer; 345 struct bridge_mcast_other_query ip4_other_query; 346 struct bridge_mcast_own_query ip4_own_query; 347 struct bridge_mcast_querier ip4_querier; 348 struct bridge_mcast_stats __percpu *mcast_stats; 349 #if IS_ENABLED(CONFIG_IPV6) 350 struct bridge_mcast_other_query ip6_other_query; 351 struct bridge_mcast_own_query ip6_own_query; 352 struct bridge_mcast_querier ip6_querier; 353 #endif /* IS_ENABLED(CONFIG_IPV6) */ 354 #endif 355 356 struct timer_list hello_timer; 357 struct timer_list tcn_timer; 358 struct timer_list topology_change_timer; 359 struct timer_list gc_timer; 360 struct kobject *ifobj; 361 u32 auto_cnt; 362 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 363 struct net_bridge_vlan_group __rcu *vlgrp; 364 u8 vlan_enabled; 365 u8 vlan_stats_enabled; 366 __be16 vlan_proto; 367 u16 default_pvid; 368 #endif 369 }; 370 371 struct br_input_skb_cb { 372 struct net_device *brdev; 373 374 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 375 int igmp; 376 int mrouters_only; 377 #endif 378 379 bool proxyarp_replied; 380 381 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 382 bool vlan_filtered; 383 #endif 384 }; 385 386 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 387 388 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 389 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 390 #else 391 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 392 #endif 393 394 #define br_printk(level, br, format, args...) \ 395 printk(level "%s: " format, (br)->dev->name, ##args) 396 397 #define br_err(__br, format, args...) \ 398 br_printk(KERN_ERR, __br, format, ##args) 399 #define br_warn(__br, format, args...) \ 400 br_printk(KERN_WARNING, __br, format, ##args) 401 #define br_notice(__br, format, args...) \ 402 br_printk(KERN_NOTICE, __br, format, ##args) 403 #define br_info(__br, format, args...) \ 404 br_printk(KERN_INFO, __br, format, ##args) 405 406 #define br_debug(br, format, args...) \ 407 pr_debug("%s: " format, (br)->dev->name, ##args) 408 409 /* called under bridge lock */ 410 static inline int br_is_root_bridge(const struct net_bridge *br) 411 { 412 return !memcmp(&br->bridge_id, &br->designated_root, 8); 413 } 414 415 /* check if a VLAN entry is global */ 416 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 417 { 418 return v->flags & BRIDGE_VLAN_INFO_MASTER; 419 } 420 421 /* check if a VLAN entry is used by the bridge */ 422 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 423 { 424 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 425 } 426 427 /* check if we should use the vlan entry, returns false if it's only context */ 428 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 429 { 430 if (br_vlan_is_master(v)) { 431 if (br_vlan_is_brentry(v)) 432 return true; 433 else 434 return false; 435 } 436 437 return true; 438 } 439 440 /* br_device.c */ 441 void br_dev_setup(struct net_device *dev); 442 void br_dev_delete(struct net_device *dev, struct list_head *list); 443 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 444 #ifdef CONFIG_NET_POLL_CONTROLLER 445 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 446 struct sk_buff *skb) 447 { 448 struct netpoll *np = p->np; 449 450 if (np) 451 netpoll_send_skb(np, skb); 452 } 453 454 int br_netpoll_enable(struct net_bridge_port *p); 455 void br_netpoll_disable(struct net_bridge_port *p); 456 #else 457 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 458 struct sk_buff *skb) 459 { 460 } 461 462 static inline int br_netpoll_enable(struct net_bridge_port *p) 463 { 464 return 0; 465 } 466 467 static inline void br_netpoll_disable(struct net_bridge_port *p) 468 { 469 } 470 #endif 471 472 /* br_fdb.c */ 473 int br_fdb_init(void); 474 void br_fdb_fini(void); 475 void br_fdb_flush(struct net_bridge *br); 476 void br_fdb_find_delete_local(struct net_bridge *br, 477 const struct net_bridge_port *p, 478 const unsigned char *addr, u16 vid); 479 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 480 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 481 void br_fdb_cleanup(unsigned long arg); 482 void br_fdb_delete_by_port(struct net_bridge *br, 483 const struct net_bridge_port *p, u16 vid, int do_all); 484 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 485 const unsigned char *addr, __u16 vid); 486 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 487 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 488 unsigned long off); 489 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 490 const unsigned char *addr, u16 vid); 491 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 492 const unsigned char *addr, u16 vid, bool added_by_user); 493 494 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 495 struct net_device *dev, const unsigned char *addr, u16 vid); 496 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 497 const unsigned char *addr, u16 vid, u16 nlh_flags); 498 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 499 struct net_device *dev, struct net_device *fdev, int idx); 500 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 501 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 502 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 503 const unsigned char *addr, u16 vid); 504 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 505 const unsigned char *addr, u16 vid); 506 507 /* br_forward.c */ 508 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 509 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 510 void br_forward(const struct net_bridge_port *to, 511 struct sk_buff *skb, struct sk_buff *skb0); 512 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 513 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 514 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 515 struct sk_buff *skb2, bool unicast); 516 517 /* br_if.c */ 518 void br_port_carrier_check(struct net_bridge_port *p); 519 int br_add_bridge(struct net *net, const char *name); 520 int br_del_bridge(struct net *net, const char *name); 521 int br_add_if(struct net_bridge *br, struct net_device *dev); 522 int br_del_if(struct net_bridge *br, struct net_device *dev); 523 int br_min_mtu(const struct net_bridge *br); 524 netdev_features_t br_features_recompute(struct net_bridge *br, 525 netdev_features_t features); 526 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 527 void br_manage_promisc(struct net_bridge *br); 528 529 /* br_input.c */ 530 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 531 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 532 533 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 534 { 535 return rcu_dereference(dev->rx_handler) == br_handle_frame; 536 } 537 538 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 539 { 540 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 541 } 542 543 /* br_ioctl.c */ 544 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 545 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 546 void __user *arg); 547 548 /* br_multicast.c */ 549 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 550 extern unsigned int br_mdb_rehash_seq; 551 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 552 struct sk_buff *skb, u16 vid); 553 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 554 struct sk_buff *skb, u16 vid); 555 int br_multicast_add_port(struct net_bridge_port *port); 556 void br_multicast_del_port(struct net_bridge_port *port); 557 void br_multicast_enable_port(struct net_bridge_port *port); 558 void br_multicast_disable_port(struct net_bridge_port *port); 559 void br_multicast_init(struct net_bridge *br); 560 void br_multicast_open(struct net_bridge *br); 561 void br_multicast_stop(struct net_bridge *br); 562 void br_multicast_dev_del(struct net_bridge *br); 563 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 564 struct sk_buff *skb); 565 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 566 struct sk_buff *skb, struct sk_buff *skb2); 567 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 568 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 569 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 570 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 571 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 572 struct net_bridge_mdb_entry * 573 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 574 struct net_bridge_mdb_entry * 575 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 576 struct br_ip *group); 577 void br_multicast_free_pg(struct rcu_head *head); 578 struct net_bridge_port_group * 579 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 580 struct net_bridge_port_group __rcu *next, 581 unsigned char flags); 582 void br_mdb_init(void); 583 void br_mdb_uninit(void); 584 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 585 struct br_ip *group, int type, u8 flags); 586 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 587 int type); 588 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 589 __be16 proto, u8 type, u8 dir); 590 int br_multicast_init_stats(struct net_bridge *br); 591 void br_multicast_get_stats(const struct net_bridge *br, 592 const struct net_bridge_port *p, 593 struct br_mcast_stats *dest); 594 595 #define mlock_dereference(X, br) \ 596 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 597 598 static inline bool br_multicast_is_router(struct net_bridge *br) 599 { 600 return br->multicast_router == 2 || 601 (br->multicast_router == 1 && 602 timer_pending(&br->multicast_router_timer)); 603 } 604 605 static inline bool 606 __br_multicast_querier_exists(struct net_bridge *br, 607 struct bridge_mcast_other_query *querier, 608 const bool is_ipv6) 609 { 610 bool own_querier_enabled; 611 612 if (br->multicast_querier) { 613 if (is_ipv6 && !br->has_ipv6_addr) 614 own_querier_enabled = false; 615 else 616 own_querier_enabled = true; 617 } else { 618 own_querier_enabled = false; 619 } 620 621 return time_is_before_jiffies(querier->delay_time) && 622 (own_querier_enabled || timer_pending(&querier->timer)); 623 } 624 625 static inline bool br_multicast_querier_exists(struct net_bridge *br, 626 struct ethhdr *eth) 627 { 628 switch (eth->h_proto) { 629 case (htons(ETH_P_IP)): 630 return __br_multicast_querier_exists(br, 631 &br->ip4_other_query, false); 632 #if IS_ENABLED(CONFIG_IPV6) 633 case (htons(ETH_P_IPV6)): 634 return __br_multicast_querier_exists(br, 635 &br->ip6_other_query, true); 636 #endif 637 default: 638 return false; 639 } 640 } 641 642 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 643 { 644 return BR_INPUT_SKB_CB(skb)->igmp; 645 } 646 #else 647 static inline int br_multicast_rcv(struct net_bridge *br, 648 struct net_bridge_port *port, 649 struct sk_buff *skb, 650 u16 vid) 651 { 652 return 0; 653 } 654 655 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 656 struct sk_buff *skb, u16 vid) 657 { 658 return NULL; 659 } 660 661 static inline int br_multicast_add_port(struct net_bridge_port *port) 662 { 663 return 0; 664 } 665 666 static inline void br_multicast_del_port(struct net_bridge_port *port) 667 { 668 } 669 670 static inline void br_multicast_enable_port(struct net_bridge_port *port) 671 { 672 } 673 674 static inline void br_multicast_disable_port(struct net_bridge_port *port) 675 { 676 } 677 678 static inline void br_multicast_init(struct net_bridge *br) 679 { 680 } 681 682 static inline void br_multicast_open(struct net_bridge *br) 683 { 684 } 685 686 static inline void br_multicast_stop(struct net_bridge *br) 687 { 688 } 689 690 static inline void br_multicast_dev_del(struct net_bridge *br) 691 { 692 } 693 694 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 695 struct sk_buff *skb) 696 { 697 } 698 699 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 700 struct sk_buff *skb, 701 struct sk_buff *skb2) 702 { 703 } 704 static inline bool br_multicast_is_router(struct net_bridge *br) 705 { 706 return 0; 707 } 708 static inline bool br_multicast_querier_exists(struct net_bridge *br, 709 struct ethhdr *eth) 710 { 711 return false; 712 } 713 static inline void br_mdb_init(void) 714 { 715 } 716 static inline void br_mdb_uninit(void) 717 { 718 } 719 720 static inline void br_multicast_count(struct net_bridge *br, 721 const struct net_bridge_port *p, 722 __be16 proto, u8 type, u8 dir) 723 { 724 } 725 726 static inline int br_multicast_init_stats(struct net_bridge *br) 727 { 728 return 0; 729 } 730 731 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 732 { 733 return 0; 734 } 735 #endif 736 737 /* br_vlan.c */ 738 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 739 bool br_allowed_ingress(const struct net_bridge *br, 740 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 741 u16 *vid); 742 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 743 const struct sk_buff *skb); 744 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 745 struct sk_buff *br_handle_vlan(struct net_bridge *br, 746 struct net_bridge_vlan_group *vg, 747 struct sk_buff *skb); 748 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 749 int br_vlan_delete(struct net_bridge *br, u16 vid); 750 void br_vlan_flush(struct net_bridge *br); 751 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 752 void br_recalculate_fwd_mask(struct net_bridge *br); 753 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 754 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 755 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 756 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 757 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 758 int br_vlan_init(struct net_bridge *br); 759 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 760 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 761 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 762 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 763 void nbp_vlan_flush(struct net_bridge_port *port); 764 int nbp_vlan_init(struct net_bridge_port *port); 765 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 766 void br_vlan_get_stats(const struct net_bridge_vlan *v, 767 struct br_vlan_stats *stats); 768 769 static inline struct net_bridge_vlan_group *br_vlan_group( 770 const struct net_bridge *br) 771 { 772 return rtnl_dereference(br->vlgrp); 773 } 774 775 static inline struct net_bridge_vlan_group *nbp_vlan_group( 776 const struct net_bridge_port *p) 777 { 778 return rtnl_dereference(p->vlgrp); 779 } 780 781 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 782 const struct net_bridge *br) 783 { 784 return rcu_dereference(br->vlgrp); 785 } 786 787 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 788 const struct net_bridge_port *p) 789 { 790 return rcu_dereference(p->vlgrp); 791 } 792 793 /* Since bridge now depends on 8021Q module, but the time bridge sees the 794 * skb, the vlan tag will always be present if the frame was tagged. 795 */ 796 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 797 { 798 int err = 0; 799 800 if (skb_vlan_tag_present(skb)) { 801 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 802 } else { 803 *vid = 0; 804 err = -EINVAL; 805 } 806 807 return err; 808 } 809 810 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 811 { 812 if (!vg) 813 return 0; 814 815 smp_rmb(); 816 return vg->pvid; 817 } 818 819 static inline int br_vlan_enabled(struct net_bridge *br) 820 { 821 return br->vlan_enabled; 822 } 823 #else 824 static inline bool br_allowed_ingress(const struct net_bridge *br, 825 struct net_bridge_vlan_group *vg, 826 struct sk_buff *skb, 827 u16 *vid) 828 { 829 return true; 830 } 831 832 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 833 const struct sk_buff *skb) 834 { 835 return true; 836 } 837 838 static inline bool br_should_learn(struct net_bridge_port *p, 839 struct sk_buff *skb, u16 *vid) 840 { 841 return true; 842 } 843 844 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 845 struct net_bridge_vlan_group *vg, 846 struct sk_buff *skb) 847 { 848 return skb; 849 } 850 851 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 852 { 853 return -EOPNOTSUPP; 854 } 855 856 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 857 { 858 return -EOPNOTSUPP; 859 } 860 861 static inline void br_vlan_flush(struct net_bridge *br) 862 { 863 } 864 865 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 866 { 867 } 868 869 static inline int br_vlan_init(struct net_bridge *br) 870 { 871 return 0; 872 } 873 874 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 875 { 876 return -EOPNOTSUPP; 877 } 878 879 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 880 { 881 return -EOPNOTSUPP; 882 } 883 884 static inline void nbp_vlan_flush(struct net_bridge_port *port) 885 { 886 } 887 888 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 889 u16 vid) 890 { 891 return NULL; 892 } 893 894 static inline int nbp_vlan_init(struct net_bridge_port *port) 895 { 896 return 0; 897 } 898 899 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 900 { 901 return 0; 902 } 903 904 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 905 { 906 return 0; 907 } 908 909 static inline int br_vlan_enabled(struct net_bridge *br) 910 { 911 return 0; 912 } 913 914 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 915 unsigned long val) 916 { 917 return -EOPNOTSUPP; 918 } 919 920 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 921 u32 filter_mask) 922 { 923 return 0; 924 } 925 926 static inline struct net_bridge_vlan_group *br_vlan_group( 927 const struct net_bridge *br) 928 { 929 return NULL; 930 } 931 932 static inline struct net_bridge_vlan_group *nbp_vlan_group( 933 const struct net_bridge_port *p) 934 { 935 return NULL; 936 } 937 938 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 939 const struct net_bridge *br) 940 { 941 return NULL; 942 } 943 944 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 945 const struct net_bridge_port *p) 946 { 947 return NULL; 948 } 949 950 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 951 struct br_vlan_stats *stats) 952 { 953 } 954 #endif 955 956 struct nf_br_ops { 957 int (*br_dev_xmit_hook)(struct sk_buff *skb); 958 }; 959 extern const struct nf_br_ops __rcu *nf_br_ops; 960 961 /* br_netfilter.c */ 962 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 963 int br_nf_core_init(void); 964 void br_nf_core_fini(void); 965 void br_netfilter_rtable_init(struct net_bridge *); 966 #else 967 static inline int br_nf_core_init(void) { return 0; } 968 static inline void br_nf_core_fini(void) {} 969 #define br_netfilter_rtable_init(x) 970 #endif 971 972 /* br_stp.c */ 973 void br_set_state(struct net_bridge_port *p, unsigned int state); 974 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 975 void br_init_port(struct net_bridge_port *p); 976 void br_become_designated_port(struct net_bridge_port *p); 977 978 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 979 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 980 int br_set_hello_time(struct net_bridge *br, unsigned long x); 981 int br_set_max_age(struct net_bridge *br, unsigned long x); 982 int br_set_ageing_time(struct net_bridge *br, u32 ageing_time); 983 984 985 /* br_stp_if.c */ 986 void br_stp_enable_bridge(struct net_bridge *br); 987 void br_stp_disable_bridge(struct net_bridge *br); 988 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 989 void br_stp_enable_port(struct net_bridge_port *p); 990 void br_stp_disable_port(struct net_bridge_port *p); 991 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 992 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 993 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 994 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 995 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 996 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 997 998 /* br_stp_bpdu.c */ 999 struct stp_proto; 1000 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1001 struct net_device *dev); 1002 1003 /* br_stp_timer.c */ 1004 void br_stp_timer_init(struct net_bridge *br); 1005 void br_stp_port_timer_init(struct net_bridge_port *p); 1006 unsigned long br_timer_value(const struct timer_list *timer); 1007 1008 /* br.c */ 1009 #if IS_ENABLED(CONFIG_ATM_LANE) 1010 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1011 #endif 1012 1013 /* br_netlink.c */ 1014 extern struct rtnl_link_ops br_link_ops; 1015 int br_netlink_init(void); 1016 void br_netlink_fini(void); 1017 void br_ifinfo_notify(int event, struct net_bridge_port *port); 1018 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1019 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1020 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1021 u32 filter_mask, int nlflags); 1022 1023 #ifdef CONFIG_SYSFS 1024 /* br_sysfs_if.c */ 1025 extern const struct sysfs_ops brport_sysfs_ops; 1026 int br_sysfs_addif(struct net_bridge_port *p); 1027 int br_sysfs_renameif(struct net_bridge_port *p); 1028 1029 /* br_sysfs_br.c */ 1030 int br_sysfs_addbr(struct net_device *dev); 1031 void br_sysfs_delbr(struct net_device *dev); 1032 1033 #else 1034 1035 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1036 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1037 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1038 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1039 #endif /* CONFIG_SYSFS */ 1040 1041 #endif 1042