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 u8 multicast_mld_version; 359 #endif /* IS_ENABLED(CONFIG_IPV6) */ 360 #endif 361 362 struct timer_list hello_timer; 363 struct timer_list tcn_timer; 364 struct timer_list topology_change_timer; 365 struct timer_list gc_timer; 366 struct kobject *ifobj; 367 u32 auto_cnt; 368 369 #ifdef CONFIG_NET_SWITCHDEV 370 int offload_fwd_mark; 371 #endif 372 373 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 374 struct net_bridge_vlan_group __rcu *vlgrp; 375 u8 vlan_enabled; 376 u8 vlan_stats_enabled; 377 __be16 vlan_proto; 378 u16 default_pvid; 379 #endif 380 }; 381 382 struct br_input_skb_cb { 383 struct net_device *brdev; 384 385 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 386 int igmp; 387 int mrouters_only; 388 #endif 389 390 bool proxyarp_replied; 391 392 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 393 bool vlan_filtered; 394 #endif 395 396 #ifdef CONFIG_NET_SWITCHDEV 397 int offload_fwd_mark; 398 #endif 399 }; 400 401 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 402 403 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 404 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 405 #else 406 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 407 #endif 408 409 #define br_printk(level, br, format, args...) \ 410 printk(level "%s: " format, (br)->dev->name, ##args) 411 412 #define br_err(__br, format, args...) \ 413 br_printk(KERN_ERR, __br, format, ##args) 414 #define br_warn(__br, format, args...) \ 415 br_printk(KERN_WARNING, __br, format, ##args) 416 #define br_notice(__br, format, args...) \ 417 br_printk(KERN_NOTICE, __br, format, ##args) 418 #define br_info(__br, format, args...) \ 419 br_printk(KERN_INFO, __br, format, ##args) 420 421 #define br_debug(br, format, args...) \ 422 pr_debug("%s: " format, (br)->dev->name, ##args) 423 424 /* called under bridge lock */ 425 static inline int br_is_root_bridge(const struct net_bridge *br) 426 { 427 return !memcmp(&br->bridge_id, &br->designated_root, 8); 428 } 429 430 /* check if a VLAN entry is global */ 431 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 432 { 433 return v->flags & BRIDGE_VLAN_INFO_MASTER; 434 } 435 436 /* check if a VLAN entry is used by the bridge */ 437 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 438 { 439 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 440 } 441 442 /* check if we should use the vlan entry, returns false if it's only context */ 443 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 444 { 445 if (br_vlan_is_master(v)) { 446 if (br_vlan_is_brentry(v)) 447 return true; 448 else 449 return false; 450 } 451 452 return true; 453 } 454 455 /* br_device.c */ 456 void br_dev_setup(struct net_device *dev); 457 void br_dev_delete(struct net_device *dev, struct list_head *list); 458 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 459 #ifdef CONFIG_NET_POLL_CONTROLLER 460 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 461 struct sk_buff *skb) 462 { 463 struct netpoll *np = p->np; 464 465 if (np) 466 netpoll_send_skb(np, skb); 467 } 468 469 int br_netpoll_enable(struct net_bridge_port *p); 470 void br_netpoll_disable(struct net_bridge_port *p); 471 #else 472 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 473 struct sk_buff *skb) 474 { 475 } 476 477 static inline int br_netpoll_enable(struct net_bridge_port *p) 478 { 479 return 0; 480 } 481 482 static inline void br_netpoll_disable(struct net_bridge_port *p) 483 { 484 } 485 #endif 486 487 /* br_fdb.c */ 488 int br_fdb_init(void); 489 void br_fdb_fini(void); 490 void br_fdb_flush(struct net_bridge *br); 491 void br_fdb_find_delete_local(struct net_bridge *br, 492 const struct net_bridge_port *p, 493 const unsigned char *addr, u16 vid); 494 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 495 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 496 void br_fdb_cleanup(unsigned long arg); 497 void br_fdb_delete_by_port(struct net_bridge *br, 498 const struct net_bridge_port *p, u16 vid, int do_all); 499 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 500 const unsigned char *addr, __u16 vid); 501 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 502 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 503 unsigned long off); 504 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 505 const unsigned char *addr, u16 vid); 506 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 507 const unsigned char *addr, u16 vid, bool added_by_user); 508 509 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 510 struct net_device *dev, const unsigned char *addr, u16 vid); 511 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 512 const unsigned char *addr, u16 vid, u16 nlh_flags); 513 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 514 struct net_device *dev, struct net_device *fdev, int *idx); 515 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 516 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 517 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 518 const unsigned char *addr, u16 vid); 519 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 520 const unsigned char *addr, u16 vid); 521 522 /* br_forward.c */ 523 enum br_pkt_type { 524 BR_PKT_UNICAST, 525 BR_PKT_MULTICAST, 526 BR_PKT_BROADCAST 527 }; 528 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 529 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 530 bool local_rcv, bool local_orig); 531 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 532 void br_flood(struct net_bridge *br, struct sk_buff *skb, 533 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 534 535 /* br_if.c */ 536 void br_port_carrier_check(struct net_bridge_port *p); 537 int br_add_bridge(struct net *net, const char *name); 538 int br_del_bridge(struct net *net, const char *name); 539 int br_add_if(struct net_bridge *br, struct net_device *dev); 540 int br_del_if(struct net_bridge *br, struct net_device *dev); 541 int br_min_mtu(const struct net_bridge *br); 542 netdev_features_t br_features_recompute(struct net_bridge *br, 543 netdev_features_t features); 544 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 545 void br_manage_promisc(struct net_bridge *br); 546 547 /* br_input.c */ 548 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 549 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 550 551 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 552 { 553 return rcu_dereference(dev->rx_handler) == br_handle_frame; 554 } 555 556 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 557 { 558 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 559 } 560 561 /* br_ioctl.c */ 562 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 563 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 564 void __user *arg); 565 566 /* br_multicast.c */ 567 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 568 extern unsigned int br_mdb_rehash_seq; 569 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 570 struct sk_buff *skb, u16 vid); 571 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 572 struct sk_buff *skb, u16 vid); 573 int br_multicast_add_port(struct net_bridge_port *port); 574 void br_multicast_del_port(struct net_bridge_port *port); 575 void br_multicast_enable_port(struct net_bridge_port *port); 576 void br_multicast_disable_port(struct net_bridge_port *port); 577 void br_multicast_init(struct net_bridge *br); 578 void br_multicast_open(struct net_bridge *br); 579 void br_multicast_stop(struct net_bridge *br); 580 void br_multicast_dev_del(struct net_bridge *br); 581 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 582 struct sk_buff *skb, bool local_rcv, bool local_orig); 583 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 584 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 585 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 586 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 587 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 588 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 589 #if IS_ENABLED(CONFIG_IPV6) 590 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 591 #endif 592 struct net_bridge_mdb_entry * 593 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 594 struct net_bridge_mdb_entry * 595 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 596 struct br_ip *group); 597 void br_multicast_free_pg(struct rcu_head *head); 598 struct net_bridge_port_group * 599 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 600 struct net_bridge_port_group __rcu *next, 601 unsigned char flags); 602 void br_mdb_init(void); 603 void br_mdb_uninit(void); 604 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 605 struct br_ip *group, int type, u8 flags); 606 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 607 int type); 608 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 609 const struct sk_buff *skb, u8 type, u8 dir); 610 int br_multicast_init_stats(struct net_bridge *br); 611 void br_multicast_get_stats(const struct net_bridge *br, 612 const struct net_bridge_port *p, 613 struct br_mcast_stats *dest); 614 615 #define mlock_dereference(X, br) \ 616 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 617 618 static inline bool br_multicast_is_router(struct net_bridge *br) 619 { 620 return br->multicast_router == 2 || 621 (br->multicast_router == 1 && 622 timer_pending(&br->multicast_router_timer)); 623 } 624 625 static inline bool 626 __br_multicast_querier_exists(struct net_bridge *br, 627 struct bridge_mcast_other_query *querier, 628 const bool is_ipv6) 629 { 630 bool own_querier_enabled; 631 632 if (br->multicast_querier) { 633 if (is_ipv6 && !br->has_ipv6_addr) 634 own_querier_enabled = false; 635 else 636 own_querier_enabled = true; 637 } else { 638 own_querier_enabled = false; 639 } 640 641 return time_is_before_jiffies(querier->delay_time) && 642 (own_querier_enabled || timer_pending(&querier->timer)); 643 } 644 645 static inline bool br_multicast_querier_exists(struct net_bridge *br, 646 struct ethhdr *eth) 647 { 648 switch (eth->h_proto) { 649 case (htons(ETH_P_IP)): 650 return __br_multicast_querier_exists(br, 651 &br->ip4_other_query, false); 652 #if IS_ENABLED(CONFIG_IPV6) 653 case (htons(ETH_P_IPV6)): 654 return __br_multicast_querier_exists(br, 655 &br->ip6_other_query, true); 656 #endif 657 default: 658 return false; 659 } 660 } 661 662 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 663 { 664 return BR_INPUT_SKB_CB(skb)->igmp; 665 } 666 #else 667 static inline int br_multicast_rcv(struct net_bridge *br, 668 struct net_bridge_port *port, 669 struct sk_buff *skb, 670 u16 vid) 671 { 672 return 0; 673 } 674 675 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 676 struct sk_buff *skb, u16 vid) 677 { 678 return NULL; 679 } 680 681 static inline int br_multicast_add_port(struct net_bridge_port *port) 682 { 683 return 0; 684 } 685 686 static inline void br_multicast_del_port(struct net_bridge_port *port) 687 { 688 } 689 690 static inline void br_multicast_enable_port(struct net_bridge_port *port) 691 { 692 } 693 694 static inline void br_multicast_disable_port(struct net_bridge_port *port) 695 { 696 } 697 698 static inline void br_multicast_init(struct net_bridge *br) 699 { 700 } 701 702 static inline void br_multicast_open(struct net_bridge *br) 703 { 704 } 705 706 static inline void br_multicast_stop(struct net_bridge *br) 707 { 708 } 709 710 static inline void br_multicast_dev_del(struct net_bridge *br) 711 { 712 } 713 714 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 715 struct sk_buff *skb, 716 bool local_rcv, bool local_orig) 717 { 718 } 719 720 static inline bool br_multicast_is_router(struct net_bridge *br) 721 { 722 return 0; 723 } 724 725 static inline bool br_multicast_querier_exists(struct net_bridge *br, 726 struct ethhdr *eth) 727 { 728 return false; 729 } 730 731 static inline void br_mdb_init(void) 732 { 733 } 734 735 static inline void br_mdb_uninit(void) 736 { 737 } 738 739 static inline void br_multicast_count(struct net_bridge *br, 740 const struct net_bridge_port *p, 741 const struct sk_buff *skb, 742 u8 type, u8 dir) 743 { 744 } 745 746 static inline int br_multicast_init_stats(struct net_bridge *br) 747 { 748 return 0; 749 } 750 751 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 752 { 753 return 0; 754 } 755 #endif 756 757 /* br_vlan.c */ 758 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 759 bool br_allowed_ingress(const struct net_bridge *br, 760 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 761 u16 *vid); 762 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 763 const struct sk_buff *skb); 764 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 765 struct sk_buff *br_handle_vlan(struct net_bridge *br, 766 struct net_bridge_vlan_group *vg, 767 struct sk_buff *skb); 768 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 769 int br_vlan_delete(struct net_bridge *br, u16 vid); 770 void br_vlan_flush(struct net_bridge *br); 771 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 772 void br_recalculate_fwd_mask(struct net_bridge *br); 773 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 774 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 775 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 776 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 777 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 778 int br_vlan_init(struct net_bridge *br); 779 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 780 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 781 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 782 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 783 void nbp_vlan_flush(struct net_bridge_port *port); 784 int nbp_vlan_init(struct net_bridge_port *port); 785 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 786 void br_vlan_get_stats(const struct net_bridge_vlan *v, 787 struct br_vlan_stats *stats); 788 789 static inline struct net_bridge_vlan_group *br_vlan_group( 790 const struct net_bridge *br) 791 { 792 return rtnl_dereference(br->vlgrp); 793 } 794 795 static inline struct net_bridge_vlan_group *nbp_vlan_group( 796 const struct net_bridge_port *p) 797 { 798 return rtnl_dereference(p->vlgrp); 799 } 800 801 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 802 const struct net_bridge *br) 803 { 804 return rcu_dereference(br->vlgrp); 805 } 806 807 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 808 const struct net_bridge_port *p) 809 { 810 return rcu_dereference(p->vlgrp); 811 } 812 813 /* Since bridge now depends on 8021Q module, but the time bridge sees the 814 * skb, the vlan tag will always be present if the frame was tagged. 815 */ 816 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 817 { 818 int err = 0; 819 820 if (skb_vlan_tag_present(skb)) { 821 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 822 } else { 823 *vid = 0; 824 err = -EINVAL; 825 } 826 827 return err; 828 } 829 830 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 831 { 832 if (!vg) 833 return 0; 834 835 smp_rmb(); 836 return vg->pvid; 837 } 838 839 static inline int br_vlan_enabled(struct net_bridge *br) 840 { 841 return br->vlan_enabled; 842 } 843 #else 844 static inline bool br_allowed_ingress(const struct net_bridge *br, 845 struct net_bridge_vlan_group *vg, 846 struct sk_buff *skb, 847 u16 *vid) 848 { 849 return true; 850 } 851 852 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 853 const struct sk_buff *skb) 854 { 855 return true; 856 } 857 858 static inline bool br_should_learn(struct net_bridge_port *p, 859 struct sk_buff *skb, u16 *vid) 860 { 861 return true; 862 } 863 864 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 865 struct net_bridge_vlan_group *vg, 866 struct sk_buff *skb) 867 { 868 return skb; 869 } 870 871 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 872 { 873 return -EOPNOTSUPP; 874 } 875 876 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 877 { 878 return -EOPNOTSUPP; 879 } 880 881 static inline void br_vlan_flush(struct net_bridge *br) 882 { 883 } 884 885 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 886 { 887 } 888 889 static inline int br_vlan_init(struct net_bridge *br) 890 { 891 return 0; 892 } 893 894 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 895 { 896 return -EOPNOTSUPP; 897 } 898 899 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 900 { 901 return -EOPNOTSUPP; 902 } 903 904 static inline void nbp_vlan_flush(struct net_bridge_port *port) 905 { 906 } 907 908 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 909 u16 vid) 910 { 911 return NULL; 912 } 913 914 static inline int nbp_vlan_init(struct net_bridge_port *port) 915 { 916 return 0; 917 } 918 919 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 920 { 921 return 0; 922 } 923 924 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 925 { 926 return 0; 927 } 928 929 static inline int br_vlan_enabled(struct net_bridge *br) 930 { 931 return 0; 932 } 933 934 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 935 unsigned long val) 936 { 937 return -EOPNOTSUPP; 938 } 939 940 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 941 u32 filter_mask) 942 { 943 return 0; 944 } 945 946 static inline struct net_bridge_vlan_group *br_vlan_group( 947 const struct net_bridge *br) 948 { 949 return NULL; 950 } 951 952 static inline struct net_bridge_vlan_group *nbp_vlan_group( 953 const struct net_bridge_port *p) 954 { 955 return NULL; 956 } 957 958 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 959 const struct net_bridge *br) 960 { 961 return NULL; 962 } 963 964 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 965 const struct net_bridge_port *p) 966 { 967 return NULL; 968 } 969 970 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 971 struct br_vlan_stats *stats) 972 { 973 } 974 #endif 975 976 struct nf_br_ops { 977 int (*br_dev_xmit_hook)(struct sk_buff *skb); 978 }; 979 extern const struct nf_br_ops __rcu *nf_br_ops; 980 981 /* br_netfilter.c */ 982 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 983 int br_nf_core_init(void); 984 void br_nf_core_fini(void); 985 void br_netfilter_rtable_init(struct net_bridge *); 986 #else 987 static inline int br_nf_core_init(void) { return 0; } 988 static inline void br_nf_core_fini(void) {} 989 #define br_netfilter_rtable_init(x) 990 #endif 991 992 /* br_stp.c */ 993 void br_set_state(struct net_bridge_port *p, unsigned int state); 994 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 995 void br_init_port(struct net_bridge_port *p); 996 void br_become_designated_port(struct net_bridge_port *p); 997 998 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 999 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1000 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1001 int br_set_max_age(struct net_bridge *br, unsigned long x); 1002 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1003 1004 1005 /* br_stp_if.c */ 1006 void br_stp_enable_bridge(struct net_bridge *br); 1007 void br_stp_disable_bridge(struct net_bridge *br); 1008 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1009 void br_stp_enable_port(struct net_bridge_port *p); 1010 void br_stp_disable_port(struct net_bridge_port *p); 1011 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1012 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1013 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1014 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1015 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1016 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1017 1018 /* br_stp_bpdu.c */ 1019 struct stp_proto; 1020 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1021 struct net_device *dev); 1022 1023 /* br_stp_timer.c */ 1024 void br_stp_timer_init(struct net_bridge *br); 1025 void br_stp_port_timer_init(struct net_bridge_port *p); 1026 unsigned long br_timer_value(const struct timer_list *timer); 1027 1028 /* br.c */ 1029 #if IS_ENABLED(CONFIG_ATM_LANE) 1030 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1031 #endif 1032 1033 /* br_netlink.c */ 1034 extern struct rtnl_link_ops br_link_ops; 1035 int br_netlink_init(void); 1036 void br_netlink_fini(void); 1037 void br_ifinfo_notify(int event, struct net_bridge_port *port); 1038 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1039 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1040 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1041 u32 filter_mask, int nlflags); 1042 1043 #ifdef CONFIG_SYSFS 1044 /* br_sysfs_if.c */ 1045 extern const struct sysfs_ops brport_sysfs_ops; 1046 int br_sysfs_addif(struct net_bridge_port *p); 1047 int br_sysfs_renameif(struct net_bridge_port *p); 1048 1049 /* br_sysfs_br.c */ 1050 int br_sysfs_addbr(struct net_device *dev); 1051 void br_sysfs_delbr(struct net_device *dev); 1052 1053 #else 1054 1055 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1056 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1057 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1058 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1059 #endif /* CONFIG_SYSFS */ 1060 1061 /* br_switchdev.c */ 1062 #ifdef CONFIG_NET_SWITCHDEV 1063 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1064 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1065 struct sk_buff *skb); 1066 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1067 const struct sk_buff *skb); 1068 #else 1069 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1070 { 1071 return 0; 1072 } 1073 1074 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1075 struct sk_buff *skb) 1076 { 1077 } 1078 1079 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1080 const struct sk_buff *skb) 1081 { 1082 return true; 1083 } 1084 #endif /* CONFIG_NET_SWITCHDEV */ 1085 1086 #endif 1087