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