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 enum br_pkt_type { 521 BR_PKT_UNICAST, 522 BR_PKT_MULTICAST, 523 BR_PKT_BROADCAST 524 }; 525 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 526 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 527 bool local_rcv, bool local_orig); 528 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 529 void br_flood(struct net_bridge *br, struct sk_buff *skb, 530 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 531 532 /* br_if.c */ 533 void br_port_carrier_check(struct net_bridge_port *p); 534 int br_add_bridge(struct net *net, const char *name); 535 int br_del_bridge(struct net *net, const char *name); 536 int br_add_if(struct net_bridge *br, struct net_device *dev); 537 int br_del_if(struct net_bridge *br, struct net_device *dev); 538 int br_min_mtu(const struct net_bridge *br); 539 netdev_features_t br_features_recompute(struct net_bridge *br, 540 netdev_features_t features); 541 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 542 void br_manage_promisc(struct net_bridge *br); 543 544 /* br_input.c */ 545 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 546 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 547 548 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 549 { 550 return rcu_dereference(dev->rx_handler) == br_handle_frame; 551 } 552 553 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 554 { 555 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 556 } 557 558 /* br_ioctl.c */ 559 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 560 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 561 void __user *arg); 562 563 /* br_multicast.c */ 564 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 565 extern unsigned int br_mdb_rehash_seq; 566 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 567 struct sk_buff *skb, u16 vid); 568 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 569 struct sk_buff *skb, u16 vid); 570 int br_multicast_add_port(struct net_bridge_port *port); 571 void br_multicast_del_port(struct net_bridge_port *port); 572 void br_multicast_enable_port(struct net_bridge_port *port); 573 void br_multicast_disable_port(struct net_bridge_port *port); 574 void br_multicast_init(struct net_bridge *br); 575 void br_multicast_open(struct net_bridge *br); 576 void br_multicast_stop(struct net_bridge *br); 577 void br_multicast_dev_del(struct net_bridge *br); 578 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 579 struct sk_buff *skb, bool local_rcv, bool local_orig); 580 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 581 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 582 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 583 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 584 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 585 struct net_bridge_mdb_entry * 586 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 587 struct net_bridge_mdb_entry * 588 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 589 struct br_ip *group); 590 void br_multicast_free_pg(struct rcu_head *head); 591 struct net_bridge_port_group * 592 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 593 struct net_bridge_port_group __rcu *next, 594 unsigned char flags); 595 void br_mdb_init(void); 596 void br_mdb_uninit(void); 597 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 598 struct br_ip *group, int type, u8 flags); 599 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 600 int type); 601 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 602 const struct sk_buff *skb, u8 type, u8 dir); 603 int br_multicast_init_stats(struct net_bridge *br); 604 void br_multicast_get_stats(const struct net_bridge *br, 605 const struct net_bridge_port *p, 606 struct br_mcast_stats *dest); 607 608 #define mlock_dereference(X, br) \ 609 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 610 611 static inline bool br_multicast_is_router(struct net_bridge *br) 612 { 613 return br->multicast_router == 2 || 614 (br->multicast_router == 1 && 615 timer_pending(&br->multicast_router_timer)); 616 } 617 618 static inline bool 619 __br_multicast_querier_exists(struct net_bridge *br, 620 struct bridge_mcast_other_query *querier, 621 const bool is_ipv6) 622 { 623 bool own_querier_enabled; 624 625 if (br->multicast_querier) { 626 if (is_ipv6 && !br->has_ipv6_addr) 627 own_querier_enabled = false; 628 else 629 own_querier_enabled = true; 630 } else { 631 own_querier_enabled = false; 632 } 633 634 return time_is_before_jiffies(querier->delay_time) && 635 (own_querier_enabled || timer_pending(&querier->timer)); 636 } 637 638 static inline bool br_multicast_querier_exists(struct net_bridge *br, 639 struct ethhdr *eth) 640 { 641 switch (eth->h_proto) { 642 case (htons(ETH_P_IP)): 643 return __br_multicast_querier_exists(br, 644 &br->ip4_other_query, false); 645 #if IS_ENABLED(CONFIG_IPV6) 646 case (htons(ETH_P_IPV6)): 647 return __br_multicast_querier_exists(br, 648 &br->ip6_other_query, true); 649 #endif 650 default: 651 return false; 652 } 653 } 654 655 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 656 { 657 return BR_INPUT_SKB_CB(skb)->igmp; 658 } 659 #else 660 static inline int br_multicast_rcv(struct net_bridge *br, 661 struct net_bridge_port *port, 662 struct sk_buff *skb, 663 u16 vid) 664 { 665 return 0; 666 } 667 668 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 669 struct sk_buff *skb, u16 vid) 670 { 671 return NULL; 672 } 673 674 static inline int br_multicast_add_port(struct net_bridge_port *port) 675 { 676 return 0; 677 } 678 679 static inline void br_multicast_del_port(struct net_bridge_port *port) 680 { 681 } 682 683 static inline void br_multicast_enable_port(struct net_bridge_port *port) 684 { 685 } 686 687 static inline void br_multicast_disable_port(struct net_bridge_port *port) 688 { 689 } 690 691 static inline void br_multicast_init(struct net_bridge *br) 692 { 693 } 694 695 static inline void br_multicast_open(struct net_bridge *br) 696 { 697 } 698 699 static inline void br_multicast_stop(struct net_bridge *br) 700 { 701 } 702 703 static inline void br_multicast_dev_del(struct net_bridge *br) 704 { 705 } 706 707 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 708 struct sk_buff *skb, 709 bool local_rcv, bool local_orig) 710 { 711 } 712 713 static inline bool br_multicast_is_router(struct net_bridge *br) 714 { 715 return 0; 716 } 717 718 static inline bool br_multicast_querier_exists(struct net_bridge *br, 719 struct ethhdr *eth) 720 { 721 return false; 722 } 723 724 static inline void br_mdb_init(void) 725 { 726 } 727 728 static inline void br_mdb_uninit(void) 729 { 730 } 731 732 static inline void br_multicast_count(struct net_bridge *br, 733 const struct net_bridge_port *p, 734 const struct sk_buff *skb, 735 u8 type, u8 dir) 736 { 737 } 738 739 static inline int br_multicast_init_stats(struct net_bridge *br) 740 { 741 return 0; 742 } 743 744 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 745 { 746 return 0; 747 } 748 #endif 749 750 /* br_vlan.c */ 751 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 752 bool br_allowed_ingress(const struct net_bridge *br, 753 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 754 u16 *vid); 755 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 756 const struct sk_buff *skb); 757 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 758 struct sk_buff *br_handle_vlan(struct net_bridge *br, 759 struct net_bridge_vlan_group *vg, 760 struct sk_buff *skb); 761 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 762 int br_vlan_delete(struct net_bridge *br, u16 vid); 763 void br_vlan_flush(struct net_bridge *br); 764 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 765 void br_recalculate_fwd_mask(struct net_bridge *br); 766 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 767 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 768 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 769 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 770 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 771 int br_vlan_init(struct net_bridge *br); 772 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 773 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 774 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 775 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 776 void nbp_vlan_flush(struct net_bridge_port *port); 777 int nbp_vlan_init(struct net_bridge_port *port); 778 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 779 void br_vlan_get_stats(const struct net_bridge_vlan *v, 780 struct br_vlan_stats *stats); 781 782 static inline struct net_bridge_vlan_group *br_vlan_group( 783 const struct net_bridge *br) 784 { 785 return rtnl_dereference(br->vlgrp); 786 } 787 788 static inline struct net_bridge_vlan_group *nbp_vlan_group( 789 const struct net_bridge_port *p) 790 { 791 return rtnl_dereference(p->vlgrp); 792 } 793 794 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 795 const struct net_bridge *br) 796 { 797 return rcu_dereference(br->vlgrp); 798 } 799 800 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 801 const struct net_bridge_port *p) 802 { 803 return rcu_dereference(p->vlgrp); 804 } 805 806 /* Since bridge now depends on 8021Q module, but the time bridge sees the 807 * skb, the vlan tag will always be present if the frame was tagged. 808 */ 809 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 810 { 811 int err = 0; 812 813 if (skb_vlan_tag_present(skb)) { 814 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 815 } else { 816 *vid = 0; 817 err = -EINVAL; 818 } 819 820 return err; 821 } 822 823 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 824 { 825 if (!vg) 826 return 0; 827 828 smp_rmb(); 829 return vg->pvid; 830 } 831 832 static inline int br_vlan_enabled(struct net_bridge *br) 833 { 834 return br->vlan_enabled; 835 } 836 #else 837 static inline bool br_allowed_ingress(const struct net_bridge *br, 838 struct net_bridge_vlan_group *vg, 839 struct sk_buff *skb, 840 u16 *vid) 841 { 842 return true; 843 } 844 845 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 846 const struct sk_buff *skb) 847 { 848 return true; 849 } 850 851 static inline bool br_should_learn(struct net_bridge_port *p, 852 struct sk_buff *skb, u16 *vid) 853 { 854 return true; 855 } 856 857 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 858 struct net_bridge_vlan_group *vg, 859 struct sk_buff *skb) 860 { 861 return skb; 862 } 863 864 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 865 { 866 return -EOPNOTSUPP; 867 } 868 869 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 870 { 871 return -EOPNOTSUPP; 872 } 873 874 static inline void br_vlan_flush(struct net_bridge *br) 875 { 876 } 877 878 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 879 { 880 } 881 882 static inline int br_vlan_init(struct net_bridge *br) 883 { 884 return 0; 885 } 886 887 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 888 { 889 return -EOPNOTSUPP; 890 } 891 892 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 893 { 894 return -EOPNOTSUPP; 895 } 896 897 static inline void nbp_vlan_flush(struct net_bridge_port *port) 898 { 899 } 900 901 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 902 u16 vid) 903 { 904 return NULL; 905 } 906 907 static inline int nbp_vlan_init(struct net_bridge_port *port) 908 { 909 return 0; 910 } 911 912 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 913 { 914 return 0; 915 } 916 917 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 918 { 919 return 0; 920 } 921 922 static inline int br_vlan_enabled(struct net_bridge *br) 923 { 924 return 0; 925 } 926 927 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 928 unsigned long val) 929 { 930 return -EOPNOTSUPP; 931 } 932 933 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 934 u32 filter_mask) 935 { 936 return 0; 937 } 938 939 static inline struct net_bridge_vlan_group *br_vlan_group( 940 const struct net_bridge *br) 941 { 942 return NULL; 943 } 944 945 static inline struct net_bridge_vlan_group *nbp_vlan_group( 946 const struct net_bridge_port *p) 947 { 948 return NULL; 949 } 950 951 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 952 const struct net_bridge *br) 953 { 954 return NULL; 955 } 956 957 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 958 const struct net_bridge_port *p) 959 { 960 return NULL; 961 } 962 963 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 964 struct br_vlan_stats *stats) 965 { 966 } 967 #endif 968 969 struct nf_br_ops { 970 int (*br_dev_xmit_hook)(struct sk_buff *skb); 971 }; 972 extern const struct nf_br_ops __rcu *nf_br_ops; 973 974 /* br_netfilter.c */ 975 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 976 int br_nf_core_init(void); 977 void br_nf_core_fini(void); 978 void br_netfilter_rtable_init(struct net_bridge *); 979 #else 980 static inline int br_nf_core_init(void) { return 0; } 981 static inline void br_nf_core_fini(void) {} 982 #define br_netfilter_rtable_init(x) 983 #endif 984 985 /* br_stp.c */ 986 void br_set_state(struct net_bridge_port *p, unsigned int state); 987 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 988 void br_init_port(struct net_bridge_port *p); 989 void br_become_designated_port(struct net_bridge_port *p); 990 991 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 992 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 993 int br_set_hello_time(struct net_bridge *br, unsigned long x); 994 int br_set_max_age(struct net_bridge *br, unsigned long x); 995 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 996 997 998 /* br_stp_if.c */ 999 void br_stp_enable_bridge(struct net_bridge *br); 1000 void br_stp_disable_bridge(struct net_bridge *br); 1001 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1002 void br_stp_enable_port(struct net_bridge_port *p); 1003 void br_stp_disable_port(struct net_bridge_port *p); 1004 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1005 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1006 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1007 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1008 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1009 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1010 1011 /* br_stp_bpdu.c */ 1012 struct stp_proto; 1013 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1014 struct net_device *dev); 1015 1016 /* br_stp_timer.c */ 1017 void br_stp_timer_init(struct net_bridge *br); 1018 void br_stp_port_timer_init(struct net_bridge_port *p); 1019 unsigned long br_timer_value(const struct timer_list *timer); 1020 1021 /* br.c */ 1022 #if IS_ENABLED(CONFIG_ATM_LANE) 1023 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1024 #endif 1025 1026 /* br_netlink.c */ 1027 extern struct rtnl_link_ops br_link_ops; 1028 int br_netlink_init(void); 1029 void br_netlink_fini(void); 1030 void br_ifinfo_notify(int event, struct net_bridge_port *port); 1031 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1032 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1033 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1034 u32 filter_mask, int nlflags); 1035 1036 #ifdef CONFIG_SYSFS 1037 /* br_sysfs_if.c */ 1038 extern const struct sysfs_ops brport_sysfs_ops; 1039 int br_sysfs_addif(struct net_bridge_port *p); 1040 int br_sysfs_renameif(struct net_bridge_port *p); 1041 1042 /* br_sysfs_br.c */ 1043 int br_sysfs_addbr(struct net_device *dev); 1044 void br_sysfs_delbr(struct net_device *dev); 1045 1046 #else 1047 1048 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1049 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1050 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1051 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1052 #endif /* CONFIG_SYSFS */ 1053 1054 /* br_switchdev.c */ 1055 #ifdef CONFIG_NET_SWITCHDEV 1056 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1057 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1058 struct sk_buff *skb); 1059 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1060 const struct sk_buff *skb); 1061 #else 1062 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1063 { 1064 return 0; 1065 } 1066 1067 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1068 struct sk_buff *skb) 1069 { 1070 } 1071 1072 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1073 const struct sk_buff *skb) 1074 { 1075 return true; 1076 } 1077 #endif /* CONFIG_NET_SWITCHDEV */ 1078 1079 #endif 1080