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 #ifdef CONFIG_NET_SWITCHDEV 255 int offload_fwd_mark; 256 #endif 257 }; 258 259 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 260 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 261 262 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 263 264 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 265 { 266 return rcu_dereference(dev->rx_handler_data); 267 } 268 269 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 270 { 271 return br_port_exists(dev) ? 272 rtnl_dereference(dev->rx_handler_data) : NULL; 273 } 274 275 struct net_bridge 276 { 277 spinlock_t lock; 278 struct list_head port_list; 279 struct net_device *dev; 280 281 struct pcpu_sw_netstats __percpu *stats; 282 spinlock_t hash_lock; 283 struct hlist_head hash[BR_HASH_SIZE]; 284 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 285 union { 286 struct rtable fake_rtable; 287 struct rt6_info fake_rt6_info; 288 }; 289 bool nf_call_iptables; 290 bool nf_call_ip6tables; 291 bool nf_call_arptables; 292 #endif 293 u16 group_fwd_mask; 294 u16 group_fwd_mask_required; 295 296 /* STP */ 297 bridge_id designated_root; 298 bridge_id bridge_id; 299 u32 root_path_cost; 300 unsigned long max_age; 301 unsigned long hello_time; 302 unsigned long forward_delay; 303 unsigned long bridge_max_age; 304 unsigned long ageing_time; 305 unsigned long bridge_hello_time; 306 unsigned long bridge_forward_delay; 307 308 u8 group_addr[ETH_ALEN]; 309 bool group_addr_set; 310 u16 root_port; 311 312 enum { 313 BR_NO_STP, /* no spanning tree */ 314 BR_KERNEL_STP, /* old STP in kernel */ 315 BR_USER_STP, /* new RSTP in userspace */ 316 } stp_enabled; 317 318 unsigned char topology_change; 319 unsigned char topology_change_detected; 320 321 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 322 unsigned char multicast_router; 323 324 u8 multicast_disabled:1; 325 u8 multicast_querier:1; 326 u8 multicast_query_use_ifaddr:1; 327 u8 has_ipv6_addr:1; 328 u8 multicast_stats_enabled:1; 329 330 u32 hash_elasticity; 331 u32 hash_max; 332 333 u32 multicast_last_member_count; 334 u32 multicast_startup_query_count; 335 336 u8 multicast_igmp_version; 337 338 unsigned long multicast_last_member_interval; 339 unsigned long multicast_membership_interval; 340 unsigned long multicast_querier_interval; 341 unsigned long multicast_query_interval; 342 unsigned long multicast_query_response_interval; 343 unsigned long multicast_startup_query_interval; 344 345 spinlock_t multicast_lock; 346 struct net_bridge_mdb_htable __rcu *mdb; 347 struct hlist_head router_list; 348 349 struct timer_list multicast_router_timer; 350 struct bridge_mcast_other_query ip4_other_query; 351 struct bridge_mcast_own_query ip4_own_query; 352 struct bridge_mcast_querier ip4_querier; 353 struct bridge_mcast_stats __percpu *mcast_stats; 354 #if IS_ENABLED(CONFIG_IPV6) 355 struct bridge_mcast_other_query ip6_other_query; 356 struct bridge_mcast_own_query ip6_own_query; 357 struct bridge_mcast_querier ip6_querier; 358 #endif /* IS_ENABLED(CONFIG_IPV6) */ 359 #endif 360 361 struct timer_list hello_timer; 362 struct timer_list tcn_timer; 363 struct timer_list topology_change_timer; 364 struct timer_list gc_timer; 365 struct kobject *ifobj; 366 u32 auto_cnt; 367 368 #ifdef CONFIG_NET_SWITCHDEV 369 int offload_fwd_mark; 370 #endif 371 372 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 373 struct net_bridge_vlan_group __rcu *vlgrp; 374 u8 vlan_enabled; 375 u8 vlan_stats_enabled; 376 __be16 vlan_proto; 377 u16 default_pvid; 378 #endif 379 }; 380 381 struct br_input_skb_cb { 382 struct net_device *brdev; 383 384 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 385 int igmp; 386 int mrouters_only; 387 #endif 388 389 bool proxyarp_replied; 390 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 392 bool vlan_filtered; 393 #endif 394 395 #ifdef CONFIG_NET_SWITCHDEV 396 int offload_fwd_mark; 397 #endif 398 }; 399 400 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 401 402 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 403 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 404 #else 405 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 406 #endif 407 408 #define br_printk(level, br, format, args...) \ 409 printk(level "%s: " format, (br)->dev->name, ##args) 410 411 #define br_err(__br, format, args...) \ 412 br_printk(KERN_ERR, __br, format, ##args) 413 #define br_warn(__br, format, args...) \ 414 br_printk(KERN_WARNING, __br, format, ##args) 415 #define br_notice(__br, format, args...) \ 416 br_printk(KERN_NOTICE, __br, format, ##args) 417 #define br_info(__br, format, args...) \ 418 br_printk(KERN_INFO, __br, format, ##args) 419 420 #define br_debug(br, format, args...) \ 421 pr_debug("%s: " format, (br)->dev->name, ##args) 422 423 /* called under bridge lock */ 424 static inline int br_is_root_bridge(const struct net_bridge *br) 425 { 426 return !memcmp(&br->bridge_id, &br->designated_root, 8); 427 } 428 429 /* check if a VLAN entry is global */ 430 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 431 { 432 return v->flags & BRIDGE_VLAN_INFO_MASTER; 433 } 434 435 /* check if a VLAN entry is used by the bridge */ 436 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 437 { 438 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 439 } 440 441 /* check if we should use the vlan entry, returns false if it's only context */ 442 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 443 { 444 if (br_vlan_is_master(v)) { 445 if (br_vlan_is_brentry(v)) 446 return true; 447 else 448 return false; 449 } 450 451 return true; 452 } 453 454 /* br_device.c */ 455 void br_dev_setup(struct net_device *dev); 456 void br_dev_delete(struct net_device *dev, struct list_head *list); 457 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 458 #ifdef CONFIG_NET_POLL_CONTROLLER 459 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 460 struct sk_buff *skb) 461 { 462 struct netpoll *np = p->np; 463 464 if (np) 465 netpoll_send_skb(np, skb); 466 } 467 468 int br_netpoll_enable(struct net_bridge_port *p); 469 void br_netpoll_disable(struct net_bridge_port *p); 470 #else 471 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 472 struct sk_buff *skb) 473 { 474 } 475 476 static inline int br_netpoll_enable(struct net_bridge_port *p) 477 { 478 return 0; 479 } 480 481 static inline void br_netpoll_disable(struct net_bridge_port *p) 482 { 483 } 484 #endif 485 486 /* br_fdb.c */ 487 int br_fdb_init(void); 488 void br_fdb_fini(void); 489 void br_fdb_flush(struct net_bridge *br); 490 void br_fdb_find_delete_local(struct net_bridge *br, 491 const struct net_bridge_port *p, 492 const unsigned char *addr, u16 vid); 493 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 494 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 495 void br_fdb_cleanup(unsigned long arg); 496 void br_fdb_delete_by_port(struct net_bridge *br, 497 const struct net_bridge_port *p, u16 vid, int do_all); 498 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 499 const unsigned char *addr, __u16 vid); 500 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 501 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 502 unsigned long off); 503 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 504 const unsigned char *addr, u16 vid); 505 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 506 const unsigned char *addr, u16 vid, bool added_by_user); 507 508 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 509 struct net_device *dev, const unsigned char *addr, u16 vid); 510 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 511 const unsigned char *addr, u16 vid, u16 nlh_flags); 512 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 513 struct net_device *dev, struct net_device *fdev, int *idx); 514 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 515 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 516 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 517 const unsigned char *addr, u16 vid); 518 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 519 const unsigned char *addr, u16 vid); 520 521 /* br_forward.c */ 522 enum br_pkt_type { 523 BR_PKT_UNICAST, 524 BR_PKT_MULTICAST, 525 BR_PKT_BROADCAST 526 }; 527 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 528 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 529 bool local_rcv, bool local_orig); 530 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 531 void br_flood(struct net_bridge *br, struct sk_buff *skb, 532 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 533 534 /* br_if.c */ 535 void br_port_carrier_check(struct net_bridge_port *p); 536 int br_add_bridge(struct net *net, const char *name); 537 int br_del_bridge(struct net *net, const char *name); 538 int br_add_if(struct net_bridge *br, struct net_device *dev); 539 int br_del_if(struct net_bridge *br, struct net_device *dev); 540 int br_min_mtu(const struct net_bridge *br); 541 netdev_features_t br_features_recompute(struct net_bridge *br, 542 netdev_features_t features); 543 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 544 void br_manage_promisc(struct net_bridge *br); 545 546 /* br_input.c */ 547 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 548 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 549 550 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 551 { 552 return rcu_dereference(dev->rx_handler) == br_handle_frame; 553 } 554 555 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 556 { 557 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 558 } 559 560 /* br_ioctl.c */ 561 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 562 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 563 void __user *arg); 564 565 /* br_multicast.c */ 566 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 567 extern unsigned int br_mdb_rehash_seq; 568 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 569 struct sk_buff *skb, u16 vid); 570 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 571 struct sk_buff *skb, u16 vid); 572 int br_multicast_add_port(struct net_bridge_port *port); 573 void br_multicast_del_port(struct net_bridge_port *port); 574 void br_multicast_enable_port(struct net_bridge_port *port); 575 void br_multicast_disable_port(struct net_bridge_port *port); 576 void br_multicast_init(struct net_bridge *br); 577 void br_multicast_open(struct net_bridge *br); 578 void br_multicast_stop(struct net_bridge *br); 579 void br_multicast_dev_del(struct net_bridge *br); 580 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 581 struct sk_buff *skb, bool local_rcv, bool local_orig); 582 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 583 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 584 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 585 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 586 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 587 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 588 struct net_bridge_mdb_entry * 589 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 590 struct net_bridge_mdb_entry * 591 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 592 struct br_ip *group); 593 void br_multicast_free_pg(struct rcu_head *head); 594 struct net_bridge_port_group * 595 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 596 struct net_bridge_port_group __rcu *next, 597 unsigned char flags); 598 void br_mdb_init(void); 599 void br_mdb_uninit(void); 600 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 601 struct br_ip *group, int type, u8 flags); 602 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 603 int type); 604 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 605 const struct sk_buff *skb, u8 type, u8 dir); 606 int br_multicast_init_stats(struct net_bridge *br); 607 void br_multicast_get_stats(const struct net_bridge *br, 608 const struct net_bridge_port *p, 609 struct br_mcast_stats *dest); 610 611 #define mlock_dereference(X, br) \ 612 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 613 614 static inline bool br_multicast_is_router(struct net_bridge *br) 615 { 616 return br->multicast_router == 2 || 617 (br->multicast_router == 1 && 618 timer_pending(&br->multicast_router_timer)); 619 } 620 621 static inline bool 622 __br_multicast_querier_exists(struct net_bridge *br, 623 struct bridge_mcast_other_query *querier, 624 const bool is_ipv6) 625 { 626 bool own_querier_enabled; 627 628 if (br->multicast_querier) { 629 if (is_ipv6 && !br->has_ipv6_addr) 630 own_querier_enabled = false; 631 else 632 own_querier_enabled = true; 633 } else { 634 own_querier_enabled = false; 635 } 636 637 return time_is_before_jiffies(querier->delay_time) && 638 (own_querier_enabled || timer_pending(&querier->timer)); 639 } 640 641 static inline bool br_multicast_querier_exists(struct net_bridge *br, 642 struct ethhdr *eth) 643 { 644 switch (eth->h_proto) { 645 case (htons(ETH_P_IP)): 646 return __br_multicast_querier_exists(br, 647 &br->ip4_other_query, false); 648 #if IS_ENABLED(CONFIG_IPV6) 649 case (htons(ETH_P_IPV6)): 650 return __br_multicast_querier_exists(br, 651 &br->ip6_other_query, true); 652 #endif 653 default: 654 return false; 655 } 656 } 657 658 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 659 { 660 return BR_INPUT_SKB_CB(skb)->igmp; 661 } 662 #else 663 static inline int br_multicast_rcv(struct net_bridge *br, 664 struct net_bridge_port *port, 665 struct sk_buff *skb, 666 u16 vid) 667 { 668 return 0; 669 } 670 671 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 672 struct sk_buff *skb, u16 vid) 673 { 674 return NULL; 675 } 676 677 static inline int br_multicast_add_port(struct net_bridge_port *port) 678 { 679 return 0; 680 } 681 682 static inline void br_multicast_del_port(struct net_bridge_port *port) 683 { 684 } 685 686 static inline void br_multicast_enable_port(struct net_bridge_port *port) 687 { 688 } 689 690 static inline void br_multicast_disable_port(struct net_bridge_port *port) 691 { 692 } 693 694 static inline void br_multicast_init(struct net_bridge *br) 695 { 696 } 697 698 static inline void br_multicast_open(struct net_bridge *br) 699 { 700 } 701 702 static inline void br_multicast_stop(struct net_bridge *br) 703 { 704 } 705 706 static inline void br_multicast_dev_del(struct net_bridge *br) 707 { 708 } 709 710 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 711 struct sk_buff *skb, 712 bool local_rcv, bool local_orig) 713 { 714 } 715 716 static inline bool br_multicast_is_router(struct net_bridge *br) 717 { 718 return 0; 719 } 720 721 static inline bool br_multicast_querier_exists(struct net_bridge *br, 722 struct ethhdr *eth) 723 { 724 return false; 725 } 726 727 static inline void br_mdb_init(void) 728 { 729 } 730 731 static inline void br_mdb_uninit(void) 732 { 733 } 734 735 static inline void br_multicast_count(struct net_bridge *br, 736 const struct net_bridge_port *p, 737 const struct sk_buff *skb, 738 u8 type, u8 dir) 739 { 740 } 741 742 static inline int br_multicast_init_stats(struct net_bridge *br) 743 { 744 return 0; 745 } 746 747 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 748 { 749 return 0; 750 } 751 #endif 752 753 /* br_vlan.c */ 754 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 755 bool br_allowed_ingress(const struct net_bridge *br, 756 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 757 u16 *vid); 758 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 759 const struct sk_buff *skb); 760 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 761 struct sk_buff *br_handle_vlan(struct net_bridge *br, 762 struct net_bridge_vlan_group *vg, 763 struct sk_buff *skb); 764 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 765 int br_vlan_delete(struct net_bridge *br, u16 vid); 766 void br_vlan_flush(struct net_bridge *br); 767 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 768 void br_recalculate_fwd_mask(struct net_bridge *br); 769 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 770 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 771 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 772 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 773 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 774 int br_vlan_init(struct net_bridge *br); 775 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 776 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 777 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 778 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 779 void nbp_vlan_flush(struct net_bridge_port *port); 780 int nbp_vlan_init(struct net_bridge_port *port); 781 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 782 void br_vlan_get_stats(const struct net_bridge_vlan *v, 783 struct br_vlan_stats *stats); 784 785 static inline struct net_bridge_vlan_group *br_vlan_group( 786 const struct net_bridge *br) 787 { 788 return rtnl_dereference(br->vlgrp); 789 } 790 791 static inline struct net_bridge_vlan_group *nbp_vlan_group( 792 const struct net_bridge_port *p) 793 { 794 return rtnl_dereference(p->vlgrp); 795 } 796 797 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 798 const struct net_bridge *br) 799 { 800 return rcu_dereference(br->vlgrp); 801 } 802 803 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 804 const struct net_bridge_port *p) 805 { 806 return rcu_dereference(p->vlgrp); 807 } 808 809 /* Since bridge now depends on 8021Q module, but the time bridge sees the 810 * skb, the vlan tag will always be present if the frame was tagged. 811 */ 812 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 813 { 814 int err = 0; 815 816 if (skb_vlan_tag_present(skb)) { 817 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 818 } else { 819 *vid = 0; 820 err = -EINVAL; 821 } 822 823 return err; 824 } 825 826 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 827 { 828 if (!vg) 829 return 0; 830 831 smp_rmb(); 832 return vg->pvid; 833 } 834 835 static inline int br_vlan_enabled(struct net_bridge *br) 836 { 837 return br->vlan_enabled; 838 } 839 #else 840 static inline bool br_allowed_ingress(const struct net_bridge *br, 841 struct net_bridge_vlan_group *vg, 842 struct sk_buff *skb, 843 u16 *vid) 844 { 845 return true; 846 } 847 848 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 849 const struct sk_buff *skb) 850 { 851 return true; 852 } 853 854 static inline bool br_should_learn(struct net_bridge_port *p, 855 struct sk_buff *skb, u16 *vid) 856 { 857 return true; 858 } 859 860 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 861 struct net_bridge_vlan_group *vg, 862 struct sk_buff *skb) 863 { 864 return skb; 865 } 866 867 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 868 { 869 return -EOPNOTSUPP; 870 } 871 872 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 873 { 874 return -EOPNOTSUPP; 875 } 876 877 static inline void br_vlan_flush(struct net_bridge *br) 878 { 879 } 880 881 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 882 { 883 } 884 885 static inline int br_vlan_init(struct net_bridge *br) 886 { 887 return 0; 888 } 889 890 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 891 { 892 return -EOPNOTSUPP; 893 } 894 895 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 896 { 897 return -EOPNOTSUPP; 898 } 899 900 static inline void nbp_vlan_flush(struct net_bridge_port *port) 901 { 902 } 903 904 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 905 u16 vid) 906 { 907 return NULL; 908 } 909 910 static inline int nbp_vlan_init(struct net_bridge_port *port) 911 { 912 return 0; 913 } 914 915 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 916 { 917 return 0; 918 } 919 920 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 921 { 922 return 0; 923 } 924 925 static inline int br_vlan_enabled(struct net_bridge *br) 926 { 927 return 0; 928 } 929 930 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 931 unsigned long val) 932 { 933 return -EOPNOTSUPP; 934 } 935 936 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 937 u32 filter_mask) 938 { 939 return 0; 940 } 941 942 static inline struct net_bridge_vlan_group *br_vlan_group( 943 const struct net_bridge *br) 944 { 945 return NULL; 946 } 947 948 static inline struct net_bridge_vlan_group *nbp_vlan_group( 949 const struct net_bridge_port *p) 950 { 951 return NULL; 952 } 953 954 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 955 const struct net_bridge *br) 956 { 957 return NULL; 958 } 959 960 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 961 const struct net_bridge_port *p) 962 { 963 return NULL; 964 } 965 966 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 967 struct br_vlan_stats *stats) 968 { 969 } 970 #endif 971 972 struct nf_br_ops { 973 int (*br_dev_xmit_hook)(struct sk_buff *skb); 974 }; 975 extern const struct nf_br_ops __rcu *nf_br_ops; 976 977 /* br_netfilter.c */ 978 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 979 int br_nf_core_init(void); 980 void br_nf_core_fini(void); 981 void br_netfilter_rtable_init(struct net_bridge *); 982 #else 983 static inline int br_nf_core_init(void) { return 0; } 984 static inline void br_nf_core_fini(void) {} 985 #define br_netfilter_rtable_init(x) 986 #endif 987 988 /* br_stp.c */ 989 void br_set_state(struct net_bridge_port *p, unsigned int state); 990 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 991 void br_init_port(struct net_bridge_port *p); 992 void br_become_designated_port(struct net_bridge_port *p); 993 994 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 995 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 996 int br_set_hello_time(struct net_bridge *br, unsigned long x); 997 int br_set_max_age(struct net_bridge *br, unsigned long x); 998 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 999 1000 1001 /* br_stp_if.c */ 1002 void br_stp_enable_bridge(struct net_bridge *br); 1003 void br_stp_disable_bridge(struct net_bridge *br); 1004 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1005 void br_stp_enable_port(struct net_bridge_port *p); 1006 void br_stp_disable_port(struct net_bridge_port *p); 1007 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1008 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1009 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1010 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1011 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1012 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1013 1014 /* br_stp_bpdu.c */ 1015 struct stp_proto; 1016 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1017 struct net_device *dev); 1018 1019 /* br_stp_timer.c */ 1020 void br_stp_timer_init(struct net_bridge *br); 1021 void br_stp_port_timer_init(struct net_bridge_port *p); 1022 unsigned long br_timer_value(const struct timer_list *timer); 1023 1024 /* br.c */ 1025 #if IS_ENABLED(CONFIG_ATM_LANE) 1026 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1027 #endif 1028 1029 /* br_netlink.c */ 1030 extern struct rtnl_link_ops br_link_ops; 1031 int br_netlink_init(void); 1032 void br_netlink_fini(void); 1033 void br_ifinfo_notify(int event, struct net_bridge_port *port); 1034 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1035 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1036 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1037 u32 filter_mask, int nlflags); 1038 1039 #ifdef CONFIG_SYSFS 1040 /* br_sysfs_if.c */ 1041 extern const struct sysfs_ops brport_sysfs_ops; 1042 int br_sysfs_addif(struct net_bridge_port *p); 1043 int br_sysfs_renameif(struct net_bridge_port *p); 1044 1045 /* br_sysfs_br.c */ 1046 int br_sysfs_addbr(struct net_device *dev); 1047 void br_sysfs_delbr(struct net_device *dev); 1048 1049 #else 1050 1051 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1052 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1053 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1054 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1055 #endif /* CONFIG_SYSFS */ 1056 1057 /* br_switchdev.c */ 1058 #ifdef CONFIG_NET_SWITCHDEV 1059 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1060 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1061 struct sk_buff *skb); 1062 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1063 const struct sk_buff *skb); 1064 #else 1065 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1066 { 1067 return 0; 1068 } 1069 1070 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1071 struct sk_buff *skb) 1072 { 1073 } 1074 1075 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1076 const struct sk_buff *skb) 1077 { 1078 return true; 1079 } 1080 #endif /* CONFIG_NET_SWITCHDEV */ 1081 1082 #endif 1083