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