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