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 struct br_tunnel_info { 95 __be64 tunnel_id; 96 struct metadata_dst *tunnel_dst; 97 }; 98 99 /** 100 * struct net_bridge_vlan - per-vlan entry 101 * 102 * @vnode: rhashtable member 103 * @vid: VLAN id 104 * @flags: bridge vlan flags 105 * @stats: per-cpu VLAN statistics 106 * @br: if MASTER flag set, this points to a bridge struct 107 * @port: if MASTER flag unset, this points to a port struct 108 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 109 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 110 * for this VLAN entry 111 * @vlist: sorted list of VLAN entries 112 * @rcu: used for entry destruction 113 * 114 * This structure is shared between the global per-VLAN entries contained in 115 * the bridge rhashtable and the local per-port per-VLAN entries contained in 116 * the port's rhashtable. The union entries should be interpreted depending on 117 * the entry flags that are set. 118 */ 119 struct net_bridge_vlan { 120 struct rhash_head vnode; 121 struct rhash_head tnode; 122 u16 vid; 123 u16 flags; 124 struct br_vlan_stats __percpu *stats; 125 union { 126 struct net_bridge *br; 127 struct net_bridge_port *port; 128 }; 129 union { 130 atomic_t refcnt; 131 struct net_bridge_vlan *brvlan; 132 }; 133 134 struct br_tunnel_info tinfo; 135 136 struct list_head vlist; 137 138 struct rcu_head rcu; 139 }; 140 141 /** 142 * struct net_bridge_vlan_group 143 * 144 * @vlan_hash: VLAN entry rhashtable 145 * @vlan_list: sorted VLAN entry list 146 * @num_vlans: number of total VLAN entries 147 * @pvid: PVID VLAN id 148 * 149 * IMPORTANT: Be careful when checking if there're VLAN entries using list 150 * primitives because the bridge can have entries in its list which 151 * are just for global context but not for filtering, i.e. they have 152 * the master flag set but not the brentry flag. If you have to check 153 * if there're "real" entries in the bridge please test @num_vlans 154 */ 155 struct net_bridge_vlan_group { 156 struct rhashtable vlan_hash; 157 struct rhashtable tunnel_hash; 158 struct list_head vlan_list; 159 u16 num_vlans; 160 u16 pvid; 161 }; 162 163 struct net_bridge_fdb_entry { 164 struct hlist_node hlist; 165 struct net_bridge_port *dst; 166 167 mac_addr addr; 168 __u16 vlan_id; 169 unsigned char is_local:1, 170 is_static:1, 171 added_by_user:1, 172 added_by_external_learn:1; 173 174 /* write-heavy members should not affect lookups */ 175 unsigned long updated ____cacheline_aligned_in_smp; 176 unsigned long used; 177 178 struct rcu_head rcu; 179 }; 180 181 #define MDB_PG_FLAGS_PERMANENT BIT(0) 182 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 183 184 struct net_bridge_port_group { 185 struct net_bridge_port *port; 186 struct net_bridge_port_group __rcu *next; 187 struct hlist_node mglist; 188 struct rcu_head rcu; 189 struct timer_list timer; 190 struct br_ip addr; 191 unsigned char flags; 192 unsigned char eth_addr[ETH_ALEN]; 193 }; 194 195 struct net_bridge_mdb_entry 196 { 197 struct hlist_node hlist[2]; 198 struct net_bridge *br; 199 struct net_bridge_port_group __rcu *ports; 200 struct rcu_head rcu; 201 struct timer_list timer; 202 struct br_ip addr; 203 bool mglist; 204 }; 205 206 struct net_bridge_mdb_htable 207 { 208 struct hlist_head *mhash; 209 struct rcu_head rcu; 210 struct net_bridge_mdb_htable *old; 211 u32 size; 212 u32 max; 213 u32 secret; 214 u32 ver; 215 }; 216 217 struct net_bridge_port { 218 struct net_bridge *br; 219 struct net_device *dev; 220 struct list_head list; 221 222 unsigned long flags; 223 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 224 struct net_bridge_vlan_group __rcu *vlgrp; 225 #endif 226 227 /* STP */ 228 u8 priority; 229 u8 state; 230 u16 port_no; 231 unsigned char topology_change_ack; 232 unsigned char config_pending; 233 port_id port_id; 234 port_id designated_port; 235 bridge_id designated_root; 236 bridge_id designated_bridge; 237 u32 path_cost; 238 u32 designated_cost; 239 unsigned long designated_age; 240 241 struct timer_list forward_delay_timer; 242 struct timer_list hold_timer; 243 struct timer_list message_age_timer; 244 struct kobject kobj; 245 struct rcu_head rcu; 246 247 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 248 struct bridge_mcast_own_query ip4_own_query; 249 #if IS_ENABLED(CONFIG_IPV6) 250 struct bridge_mcast_own_query ip6_own_query; 251 #endif /* IS_ENABLED(CONFIG_IPV6) */ 252 unsigned char multicast_router; 253 struct bridge_mcast_stats __percpu *mcast_stats; 254 struct timer_list multicast_router_timer; 255 struct hlist_head mglist; 256 struct hlist_node rlist; 257 #endif 258 259 #ifdef CONFIG_SYSFS 260 char sysfs_name[IFNAMSIZ]; 261 #endif 262 263 #ifdef CONFIG_NET_POLL_CONTROLLER 264 struct netpoll *np; 265 #endif 266 #ifdef CONFIG_NET_SWITCHDEV 267 int offload_fwd_mark; 268 #endif 269 }; 270 271 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 272 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 273 274 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 275 276 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 277 { 278 return rcu_dereference(dev->rx_handler_data); 279 } 280 281 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 282 { 283 return br_port_exists(dev) ? 284 rtnl_dereference(dev->rx_handler_data) : NULL; 285 } 286 287 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 288 { 289 return br_port_exists(dev) ? 290 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 291 } 292 293 struct net_bridge { 294 spinlock_t lock; 295 spinlock_t hash_lock; 296 struct list_head port_list; 297 struct net_device *dev; 298 struct pcpu_sw_netstats __percpu *stats; 299 /* These fields are accessed on each packet */ 300 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 301 u8 vlan_enabled; 302 u8 vlan_stats_enabled; 303 __be16 vlan_proto; 304 u16 default_pvid; 305 struct net_bridge_vlan_group __rcu *vlgrp; 306 #endif 307 308 struct hlist_head hash[BR_HASH_SIZE]; 309 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 310 union { 311 struct rtable fake_rtable; 312 struct rt6_info fake_rt6_info; 313 }; 314 bool nf_call_iptables; 315 bool nf_call_ip6tables; 316 bool nf_call_arptables; 317 #endif 318 u16 group_fwd_mask; 319 u16 group_fwd_mask_required; 320 321 /* STP */ 322 bridge_id designated_root; 323 bridge_id bridge_id; 324 u32 root_path_cost; 325 unsigned char topology_change; 326 unsigned char topology_change_detected; 327 u16 root_port; 328 unsigned long max_age; 329 unsigned long hello_time; 330 unsigned long forward_delay; 331 unsigned long ageing_time; 332 unsigned long bridge_max_age; 333 unsigned long bridge_hello_time; 334 unsigned long bridge_forward_delay; 335 unsigned long bridge_ageing_time; 336 337 u8 group_addr[ETH_ALEN]; 338 bool group_addr_set; 339 340 enum { 341 BR_NO_STP, /* no spanning tree */ 342 BR_KERNEL_STP, /* old STP in kernel */ 343 BR_USER_STP, /* new RSTP in userspace */ 344 } stp_enabled; 345 346 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 347 unsigned char multicast_router; 348 349 u8 multicast_disabled:1; 350 u8 multicast_querier:1; 351 u8 multicast_query_use_ifaddr:1; 352 u8 has_ipv6_addr:1; 353 u8 multicast_stats_enabled:1; 354 355 u32 hash_elasticity; 356 u32 hash_max; 357 358 u32 multicast_last_member_count; 359 u32 multicast_startup_query_count; 360 361 u8 multicast_igmp_version; 362 363 unsigned long multicast_last_member_interval; 364 unsigned long multicast_membership_interval; 365 unsigned long multicast_querier_interval; 366 unsigned long multicast_query_interval; 367 unsigned long multicast_query_response_interval; 368 unsigned long multicast_startup_query_interval; 369 370 spinlock_t multicast_lock; 371 struct net_bridge_mdb_htable __rcu *mdb; 372 struct hlist_head router_list; 373 374 struct timer_list multicast_router_timer; 375 struct bridge_mcast_other_query ip4_other_query; 376 struct bridge_mcast_own_query ip4_own_query; 377 struct bridge_mcast_querier ip4_querier; 378 struct bridge_mcast_stats __percpu *mcast_stats; 379 #if IS_ENABLED(CONFIG_IPV6) 380 struct bridge_mcast_other_query ip6_other_query; 381 struct bridge_mcast_own_query ip6_own_query; 382 struct bridge_mcast_querier ip6_querier; 383 u8 multicast_mld_version; 384 #endif /* IS_ENABLED(CONFIG_IPV6) */ 385 #endif 386 387 struct timer_list hello_timer; 388 struct timer_list tcn_timer; 389 struct timer_list topology_change_timer; 390 struct delayed_work gc_work; 391 struct kobject *ifobj; 392 u32 auto_cnt; 393 394 #ifdef CONFIG_NET_SWITCHDEV 395 int offload_fwd_mark; 396 #endif 397 }; 398 399 struct br_input_skb_cb { 400 struct net_device *brdev; 401 402 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 403 int igmp; 404 int mrouters_only; 405 #endif 406 407 bool proxyarp_replied; 408 409 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 410 bool vlan_filtered; 411 #endif 412 413 #ifdef CONFIG_NET_SWITCHDEV 414 int offload_fwd_mark; 415 #endif 416 }; 417 418 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 419 420 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 421 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 422 #else 423 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 424 #endif 425 426 #define br_printk(level, br, format, args...) \ 427 printk(level "%s: " format, (br)->dev->name, ##args) 428 429 #define br_err(__br, format, args...) \ 430 br_printk(KERN_ERR, __br, format, ##args) 431 #define br_warn(__br, format, args...) \ 432 br_printk(KERN_WARNING, __br, format, ##args) 433 #define br_notice(__br, format, args...) \ 434 br_printk(KERN_NOTICE, __br, format, ##args) 435 #define br_info(__br, format, args...) \ 436 br_printk(KERN_INFO, __br, format, ##args) 437 438 #define br_debug(br, format, args...) \ 439 pr_debug("%s: " format, (br)->dev->name, ##args) 440 441 /* called under bridge lock */ 442 static inline int br_is_root_bridge(const struct net_bridge *br) 443 { 444 return !memcmp(&br->bridge_id, &br->designated_root, 8); 445 } 446 447 /* check if a VLAN entry is global */ 448 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 449 { 450 return v->flags & BRIDGE_VLAN_INFO_MASTER; 451 } 452 453 /* check if a VLAN entry is used by the bridge */ 454 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 455 { 456 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 457 } 458 459 /* check if we should use the vlan entry, returns false if it's only context */ 460 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 461 { 462 if (br_vlan_is_master(v)) { 463 if (br_vlan_is_brentry(v)) 464 return true; 465 else 466 return false; 467 } 468 469 return true; 470 } 471 472 /* br_device.c */ 473 void br_dev_setup(struct net_device *dev); 474 void br_dev_delete(struct net_device *dev, struct list_head *list); 475 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 476 #ifdef CONFIG_NET_POLL_CONTROLLER 477 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 478 struct sk_buff *skb) 479 { 480 struct netpoll *np = p->np; 481 482 if (np) 483 netpoll_send_skb(np, skb); 484 } 485 486 int br_netpoll_enable(struct net_bridge_port *p); 487 void br_netpoll_disable(struct net_bridge_port *p); 488 #else 489 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 490 struct sk_buff *skb) 491 { 492 } 493 494 static inline int br_netpoll_enable(struct net_bridge_port *p) 495 { 496 return 0; 497 } 498 499 static inline void br_netpoll_disable(struct net_bridge_port *p) 500 { 501 } 502 #endif 503 504 /* br_fdb.c */ 505 int br_fdb_init(void); 506 void br_fdb_fini(void); 507 void br_fdb_flush(struct net_bridge *br); 508 void br_fdb_find_delete_local(struct net_bridge *br, 509 const struct net_bridge_port *p, 510 const unsigned char *addr, u16 vid); 511 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 512 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 513 void br_fdb_cleanup(struct work_struct *work); 514 void br_fdb_delete_by_port(struct net_bridge *br, 515 const struct net_bridge_port *p, u16 vid, int do_all); 516 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 517 const unsigned char *addr, 518 __u16 vid); 519 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 520 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 521 unsigned long off); 522 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 523 const unsigned char *addr, u16 vid); 524 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 525 const unsigned char *addr, u16 vid, bool added_by_user); 526 527 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 528 struct net_device *dev, const unsigned char *addr, u16 vid); 529 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 530 const unsigned char *addr, u16 vid, u16 nlh_flags); 531 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 532 struct net_device *dev, struct net_device *fdev, int *idx); 533 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 534 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 535 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 536 const unsigned char *addr, u16 vid); 537 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 538 const unsigned char *addr, u16 vid); 539 540 /* br_forward.c */ 541 enum br_pkt_type { 542 BR_PKT_UNICAST, 543 BR_PKT_MULTICAST, 544 BR_PKT_BROADCAST 545 }; 546 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 547 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 548 bool local_rcv, bool local_orig); 549 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 550 void br_flood(struct net_bridge *br, struct sk_buff *skb, 551 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 552 553 /* br_if.c */ 554 void br_port_carrier_check(struct net_bridge_port *p); 555 int br_add_bridge(struct net *net, const char *name); 556 int br_del_bridge(struct net *net, const char *name); 557 int br_add_if(struct net_bridge *br, struct net_device *dev); 558 int br_del_if(struct net_bridge *br, struct net_device *dev); 559 int br_min_mtu(const struct net_bridge *br); 560 netdev_features_t br_features_recompute(struct net_bridge *br, 561 netdev_features_t features); 562 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 563 void br_manage_promisc(struct net_bridge *br); 564 565 /* br_input.c */ 566 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 567 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 568 569 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 570 { 571 return rcu_dereference(dev->rx_handler) == br_handle_frame; 572 } 573 574 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 575 { 576 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 577 } 578 579 /* br_ioctl.c */ 580 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 581 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 582 void __user *arg); 583 584 /* br_multicast.c */ 585 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 586 extern unsigned int br_mdb_rehash_seq; 587 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 588 struct sk_buff *skb, u16 vid); 589 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 590 struct sk_buff *skb, u16 vid); 591 int br_multicast_add_port(struct net_bridge_port *port); 592 void br_multicast_del_port(struct net_bridge_port *port); 593 void br_multicast_enable_port(struct net_bridge_port *port); 594 void br_multicast_disable_port(struct net_bridge_port *port); 595 void br_multicast_init(struct net_bridge *br); 596 void br_multicast_open(struct net_bridge *br); 597 void br_multicast_stop(struct net_bridge *br); 598 void br_multicast_dev_del(struct net_bridge *br); 599 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 600 struct sk_buff *skb, bool local_rcv, bool local_orig); 601 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 602 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 603 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 604 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 605 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 606 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 607 #if IS_ENABLED(CONFIG_IPV6) 608 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 609 #endif 610 struct net_bridge_mdb_entry * 611 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 612 struct net_bridge_mdb_entry * 613 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 614 struct br_ip *group); 615 void br_multicast_free_pg(struct rcu_head *head); 616 struct net_bridge_port_group * 617 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 618 struct net_bridge_port_group __rcu *next, 619 unsigned char flags, const unsigned char *src); 620 void br_mdb_init(void); 621 void br_mdb_uninit(void); 622 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 623 struct br_ip *group, int type, u8 flags); 624 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 625 int type); 626 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 627 const struct sk_buff *skb, u8 type, u8 dir); 628 int br_multicast_init_stats(struct net_bridge *br); 629 void br_multicast_uninit_stats(struct net_bridge *br); 630 void br_multicast_get_stats(const struct net_bridge *br, 631 const struct net_bridge_port *p, 632 struct br_mcast_stats *dest); 633 634 #define mlock_dereference(X, br) \ 635 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 636 637 static inline bool br_multicast_is_router(struct net_bridge *br) 638 { 639 return br->multicast_router == 2 || 640 (br->multicast_router == 1 && 641 timer_pending(&br->multicast_router_timer)); 642 } 643 644 static inline bool 645 __br_multicast_querier_exists(struct net_bridge *br, 646 struct bridge_mcast_other_query *querier, 647 const bool is_ipv6) 648 { 649 bool own_querier_enabled; 650 651 if (br->multicast_querier) { 652 if (is_ipv6 && !br->has_ipv6_addr) 653 own_querier_enabled = false; 654 else 655 own_querier_enabled = true; 656 } else { 657 own_querier_enabled = false; 658 } 659 660 return time_is_before_jiffies(querier->delay_time) && 661 (own_querier_enabled || timer_pending(&querier->timer)); 662 } 663 664 static inline bool br_multicast_querier_exists(struct net_bridge *br, 665 struct ethhdr *eth) 666 { 667 switch (eth->h_proto) { 668 case (htons(ETH_P_IP)): 669 return __br_multicast_querier_exists(br, 670 &br->ip4_other_query, false); 671 #if IS_ENABLED(CONFIG_IPV6) 672 case (htons(ETH_P_IPV6)): 673 return __br_multicast_querier_exists(br, 674 &br->ip6_other_query, true); 675 #endif 676 default: 677 return false; 678 } 679 } 680 681 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 682 { 683 return BR_INPUT_SKB_CB(skb)->igmp; 684 } 685 #else 686 static inline int br_multicast_rcv(struct net_bridge *br, 687 struct net_bridge_port *port, 688 struct sk_buff *skb, 689 u16 vid) 690 { 691 return 0; 692 } 693 694 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 695 struct sk_buff *skb, u16 vid) 696 { 697 return NULL; 698 } 699 700 static inline int br_multicast_add_port(struct net_bridge_port *port) 701 { 702 return 0; 703 } 704 705 static inline void br_multicast_del_port(struct net_bridge_port *port) 706 { 707 } 708 709 static inline void br_multicast_enable_port(struct net_bridge_port *port) 710 { 711 } 712 713 static inline void br_multicast_disable_port(struct net_bridge_port *port) 714 { 715 } 716 717 static inline void br_multicast_init(struct net_bridge *br) 718 { 719 } 720 721 static inline void br_multicast_open(struct net_bridge *br) 722 { 723 } 724 725 static inline void br_multicast_stop(struct net_bridge *br) 726 { 727 } 728 729 static inline void br_multicast_dev_del(struct net_bridge *br) 730 { 731 } 732 733 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 734 struct sk_buff *skb, 735 bool local_rcv, bool local_orig) 736 { 737 } 738 739 static inline bool br_multicast_is_router(struct net_bridge *br) 740 { 741 return 0; 742 } 743 744 static inline bool br_multicast_querier_exists(struct net_bridge *br, 745 struct ethhdr *eth) 746 { 747 return false; 748 } 749 750 static inline void br_mdb_init(void) 751 { 752 } 753 754 static inline void br_mdb_uninit(void) 755 { 756 } 757 758 static inline void br_multicast_count(struct net_bridge *br, 759 const struct net_bridge_port *p, 760 const struct sk_buff *skb, 761 u8 type, u8 dir) 762 { 763 } 764 765 static inline int br_multicast_init_stats(struct net_bridge *br) 766 { 767 return 0; 768 } 769 770 static inline void br_multicast_uninit_stats(struct net_bridge *br) 771 { 772 } 773 774 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 775 { 776 return 0; 777 } 778 #endif 779 780 /* br_vlan.c */ 781 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 782 bool br_allowed_ingress(const struct net_bridge *br, 783 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 784 u16 *vid); 785 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 786 const struct sk_buff *skb); 787 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 788 struct sk_buff *br_handle_vlan(struct net_bridge *br, 789 const struct net_bridge_port *port, 790 struct net_bridge_vlan_group *vg, 791 struct sk_buff *skb); 792 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 793 int br_vlan_delete(struct net_bridge *br, u16 vid); 794 void br_vlan_flush(struct net_bridge *br); 795 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 796 void br_recalculate_fwd_mask(struct net_bridge *br); 797 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 798 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 799 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 800 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 801 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 802 int br_vlan_init(struct net_bridge *br); 803 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 804 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 805 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 806 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 807 void nbp_vlan_flush(struct net_bridge_port *port); 808 int nbp_vlan_init(struct net_bridge_port *port); 809 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 810 void br_vlan_get_stats(const struct net_bridge_vlan *v, 811 struct br_vlan_stats *stats); 812 813 static inline struct net_bridge_vlan_group *br_vlan_group( 814 const struct net_bridge *br) 815 { 816 return rtnl_dereference(br->vlgrp); 817 } 818 819 static inline struct net_bridge_vlan_group *nbp_vlan_group( 820 const struct net_bridge_port *p) 821 { 822 return rtnl_dereference(p->vlgrp); 823 } 824 825 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 826 const struct net_bridge *br) 827 { 828 return rcu_dereference(br->vlgrp); 829 } 830 831 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 832 const struct net_bridge_port *p) 833 { 834 return rcu_dereference(p->vlgrp); 835 } 836 837 /* Since bridge now depends on 8021Q module, but the time bridge sees the 838 * skb, the vlan tag will always be present if the frame was tagged. 839 */ 840 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 841 { 842 int err = 0; 843 844 if (skb_vlan_tag_present(skb)) { 845 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 846 } else { 847 *vid = 0; 848 err = -EINVAL; 849 } 850 851 return err; 852 } 853 854 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 855 { 856 if (!vg) 857 return 0; 858 859 smp_rmb(); 860 return vg->pvid; 861 } 862 863 #else 864 static inline bool br_allowed_ingress(const struct net_bridge *br, 865 struct net_bridge_vlan_group *vg, 866 struct sk_buff *skb, 867 u16 *vid) 868 { 869 return true; 870 } 871 872 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 873 const struct sk_buff *skb) 874 { 875 return true; 876 } 877 878 static inline bool br_should_learn(struct net_bridge_port *p, 879 struct sk_buff *skb, u16 *vid) 880 { 881 return true; 882 } 883 884 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 885 const struct net_bridge_port *port, 886 struct net_bridge_vlan_group *vg, 887 struct sk_buff *skb) 888 { 889 return skb; 890 } 891 892 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 893 { 894 return -EOPNOTSUPP; 895 } 896 897 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 898 { 899 return -EOPNOTSUPP; 900 } 901 902 static inline void br_vlan_flush(struct net_bridge *br) 903 { 904 } 905 906 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 907 { 908 } 909 910 static inline int br_vlan_init(struct net_bridge *br) 911 { 912 return 0; 913 } 914 915 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 916 { 917 return -EOPNOTSUPP; 918 } 919 920 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 921 { 922 return -EOPNOTSUPP; 923 } 924 925 static inline void nbp_vlan_flush(struct net_bridge_port *port) 926 { 927 } 928 929 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 930 u16 vid) 931 { 932 return NULL; 933 } 934 935 static inline int nbp_vlan_init(struct net_bridge_port *port) 936 { 937 return 0; 938 } 939 940 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 941 { 942 return 0; 943 } 944 945 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 946 { 947 return 0; 948 } 949 950 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 951 unsigned long val) 952 { 953 return -EOPNOTSUPP; 954 } 955 956 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 957 u32 filter_mask) 958 { 959 return 0; 960 } 961 962 static inline struct net_bridge_vlan_group *br_vlan_group( 963 const struct net_bridge *br) 964 { 965 return NULL; 966 } 967 968 static inline struct net_bridge_vlan_group *nbp_vlan_group( 969 const struct net_bridge_port *p) 970 { 971 return NULL; 972 } 973 974 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 975 const struct net_bridge *br) 976 { 977 return NULL; 978 } 979 980 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 981 const struct net_bridge_port *p) 982 { 983 return NULL; 984 } 985 986 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 987 struct br_vlan_stats *stats) 988 { 989 } 990 #endif 991 992 struct nf_br_ops { 993 int (*br_dev_xmit_hook)(struct sk_buff *skb); 994 }; 995 extern const struct nf_br_ops __rcu *nf_br_ops; 996 997 /* br_netfilter.c */ 998 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 999 int br_nf_core_init(void); 1000 void br_nf_core_fini(void); 1001 void br_netfilter_rtable_init(struct net_bridge *); 1002 #else 1003 static inline int br_nf_core_init(void) { return 0; } 1004 static inline void br_nf_core_fini(void) {} 1005 #define br_netfilter_rtable_init(x) 1006 #endif 1007 1008 /* br_stp.c */ 1009 void br_set_state(struct net_bridge_port *p, unsigned int state); 1010 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1011 void br_init_port(struct net_bridge_port *p); 1012 void br_become_designated_port(struct net_bridge_port *p); 1013 1014 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1015 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1016 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1017 int br_set_max_age(struct net_bridge *br, unsigned long x); 1018 int __set_ageing_time(struct net_device *dev, unsigned long t); 1019 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1020 1021 1022 /* br_stp_if.c */ 1023 void br_stp_enable_bridge(struct net_bridge *br); 1024 void br_stp_disable_bridge(struct net_bridge *br); 1025 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1026 void br_stp_enable_port(struct net_bridge_port *p); 1027 void br_stp_disable_port(struct net_bridge_port *p); 1028 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1029 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1030 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1031 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1032 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1033 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1034 1035 /* br_stp_bpdu.c */ 1036 struct stp_proto; 1037 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1038 struct net_device *dev); 1039 1040 /* br_stp_timer.c */ 1041 void br_stp_timer_init(struct net_bridge *br); 1042 void br_stp_port_timer_init(struct net_bridge_port *p); 1043 unsigned long br_timer_value(const struct timer_list *timer); 1044 1045 /* br.c */ 1046 #if IS_ENABLED(CONFIG_ATM_LANE) 1047 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1048 #endif 1049 1050 /* br_netlink.c */ 1051 extern struct rtnl_link_ops br_link_ops; 1052 int br_netlink_init(void); 1053 void br_netlink_fini(void); 1054 void br_ifinfo_notify(int event, struct net_bridge_port *port); 1055 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1056 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1057 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1058 u32 filter_mask, int nlflags); 1059 1060 #ifdef CONFIG_SYSFS 1061 /* br_sysfs_if.c */ 1062 extern const struct sysfs_ops brport_sysfs_ops; 1063 int br_sysfs_addif(struct net_bridge_port *p); 1064 int br_sysfs_renameif(struct net_bridge_port *p); 1065 1066 /* br_sysfs_br.c */ 1067 int br_sysfs_addbr(struct net_device *dev); 1068 void br_sysfs_delbr(struct net_device *dev); 1069 1070 #else 1071 1072 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1073 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1074 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1075 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1076 #endif /* CONFIG_SYSFS */ 1077 1078 /* br_switchdev.c */ 1079 #ifdef CONFIG_NET_SWITCHDEV 1080 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1081 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1082 struct sk_buff *skb); 1083 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1084 const struct sk_buff *skb); 1085 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1086 unsigned long flags, 1087 unsigned long mask); 1088 #else 1089 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1090 { 1091 return 0; 1092 } 1093 1094 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1095 struct sk_buff *skb) 1096 { 1097 } 1098 1099 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1100 const struct sk_buff *skb) 1101 { 1102 return true; 1103 } 1104 1105 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1106 unsigned long flags, 1107 unsigned long mask) 1108 { 1109 return 0; 1110 } 1111 #endif /* CONFIG_NET_SWITCHDEV */ 1112 1113 #endif 1114