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 #endif 79 80 /** 81 * struct net_bridge_vlan - per-vlan entry 82 * 83 * @vnode: rhashtable member 84 * @vid: VLAN id 85 * @flags: bridge vlan flags 86 * @br: if MASTER flag set, this points to a bridge struct 87 * @port: if MASTER flag unset, this points to a port struct 88 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 89 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 90 * for this VLAN entry 91 * @vlist: sorted list of VLAN entries 92 * @rcu: used for entry destruction 93 * 94 * This structure is shared between the global per-VLAN entries contained in 95 * the bridge rhashtable and the local per-port per-VLAN entries contained in 96 * the port's rhashtable. The union entries should be interpreted depending on 97 * the entry flags that are set. 98 */ 99 struct net_bridge_vlan { 100 struct rhash_head vnode; 101 u16 vid; 102 u16 flags; 103 union { 104 struct net_bridge *br; 105 struct net_bridge_port *port; 106 }; 107 union { 108 atomic_t refcnt; 109 struct net_bridge_vlan *brvlan; 110 }; 111 struct list_head vlist; 112 113 struct rcu_head rcu; 114 }; 115 116 /** 117 * struct net_bridge_vlan_group 118 * 119 * @vlan_hash: VLAN entry rhashtable 120 * @vlan_list: sorted VLAN entry list 121 * @num_vlans: number of total VLAN entries 122 * @pvid: PVID VLAN id 123 * 124 * IMPORTANT: Be careful when checking if there're VLAN entries using list 125 * primitives because the bridge can have entries in its list which 126 * are just for global context but not for filtering, i.e. they have 127 * the master flag set but not the brentry flag. If you have to check 128 * if there're "real" entries in the bridge please test @num_vlans 129 */ 130 struct net_bridge_vlan_group { 131 struct rhashtable vlan_hash; 132 struct list_head vlan_list; 133 u16 num_vlans; 134 u16 pvid; 135 }; 136 137 struct net_bridge_fdb_entry 138 { 139 struct hlist_node hlist; 140 struct net_bridge_port *dst; 141 142 unsigned long updated; 143 unsigned long used; 144 mac_addr addr; 145 __u16 vlan_id; 146 unsigned char is_local:1, 147 is_static:1, 148 added_by_user:1, 149 added_by_external_learn:1; 150 struct rcu_head rcu; 151 }; 152 153 #define MDB_PG_FLAGS_PERMANENT BIT(0) 154 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 155 156 struct net_bridge_port_group { 157 struct net_bridge_port *port; 158 struct net_bridge_port_group __rcu *next; 159 struct hlist_node mglist; 160 struct rcu_head rcu; 161 struct timer_list timer; 162 struct br_ip addr; 163 unsigned char flags; 164 }; 165 166 struct net_bridge_mdb_entry 167 { 168 struct hlist_node hlist[2]; 169 struct net_bridge *br; 170 struct net_bridge_port_group __rcu *ports; 171 struct rcu_head rcu; 172 struct timer_list timer; 173 struct br_ip addr; 174 bool mglist; 175 }; 176 177 struct net_bridge_mdb_htable 178 { 179 struct hlist_head *mhash; 180 struct rcu_head rcu; 181 struct net_bridge_mdb_htable *old; 182 u32 size; 183 u32 max; 184 u32 secret; 185 u32 ver; 186 }; 187 188 struct net_bridge_port 189 { 190 struct net_bridge *br; 191 struct net_device *dev; 192 struct list_head list; 193 194 /* STP */ 195 u8 priority; 196 u8 state; 197 u16 port_no; 198 unsigned char topology_change_ack; 199 unsigned char config_pending; 200 port_id port_id; 201 port_id designated_port; 202 bridge_id designated_root; 203 bridge_id designated_bridge; 204 u32 path_cost; 205 u32 designated_cost; 206 unsigned long designated_age; 207 208 struct timer_list forward_delay_timer; 209 struct timer_list hold_timer; 210 struct timer_list message_age_timer; 211 struct kobject kobj; 212 struct rcu_head rcu; 213 214 unsigned long flags; 215 216 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 217 struct bridge_mcast_own_query ip4_own_query; 218 #if IS_ENABLED(CONFIG_IPV6) 219 struct bridge_mcast_own_query ip6_own_query; 220 #endif /* IS_ENABLED(CONFIG_IPV6) */ 221 unsigned char multicast_router; 222 struct timer_list multicast_router_timer; 223 struct hlist_head mglist; 224 struct hlist_node rlist; 225 #endif 226 227 #ifdef CONFIG_SYSFS 228 char sysfs_name[IFNAMSIZ]; 229 #endif 230 231 #ifdef CONFIG_NET_POLL_CONTROLLER 232 struct netpoll *np; 233 #endif 234 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 235 struct net_bridge_vlan_group __rcu *vlgrp; 236 #endif 237 }; 238 239 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 240 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 241 242 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 243 244 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 245 { 246 return rcu_dereference(dev->rx_handler_data); 247 } 248 249 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 250 { 251 return br_port_exists(dev) ? 252 rtnl_dereference(dev->rx_handler_data) : NULL; 253 } 254 255 struct net_bridge 256 { 257 spinlock_t lock; 258 struct list_head port_list; 259 struct net_device *dev; 260 261 struct pcpu_sw_netstats __percpu *stats; 262 spinlock_t hash_lock; 263 struct hlist_head hash[BR_HASH_SIZE]; 264 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 265 union { 266 struct rtable fake_rtable; 267 struct rt6_info fake_rt6_info; 268 }; 269 bool nf_call_iptables; 270 bool nf_call_ip6tables; 271 bool nf_call_arptables; 272 #endif 273 u16 group_fwd_mask; 274 u16 group_fwd_mask_required; 275 276 /* STP */ 277 bridge_id designated_root; 278 bridge_id bridge_id; 279 u32 root_path_cost; 280 unsigned long max_age; 281 unsigned long hello_time; 282 unsigned long forward_delay; 283 unsigned long bridge_max_age; 284 unsigned long ageing_time; 285 unsigned long bridge_hello_time; 286 unsigned long bridge_forward_delay; 287 288 u8 group_addr[ETH_ALEN]; 289 bool group_addr_set; 290 u16 root_port; 291 292 enum { 293 BR_NO_STP, /* no spanning tree */ 294 BR_KERNEL_STP, /* old STP in kernel */ 295 BR_USER_STP, /* new RSTP in userspace */ 296 } stp_enabled; 297 298 unsigned char topology_change; 299 unsigned char topology_change_detected; 300 301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 302 unsigned char multicast_router; 303 304 u8 multicast_disabled:1; 305 u8 multicast_querier:1; 306 u8 multicast_query_use_ifaddr:1; 307 308 u32 hash_elasticity; 309 u32 hash_max; 310 311 u32 multicast_last_member_count; 312 u32 multicast_startup_query_count; 313 314 unsigned long multicast_last_member_interval; 315 unsigned long multicast_membership_interval; 316 unsigned long multicast_querier_interval; 317 unsigned long multicast_query_interval; 318 unsigned long multicast_query_response_interval; 319 unsigned long multicast_startup_query_interval; 320 321 spinlock_t multicast_lock; 322 struct net_bridge_mdb_htable __rcu *mdb; 323 struct hlist_head router_list; 324 325 struct timer_list multicast_router_timer; 326 struct bridge_mcast_other_query ip4_other_query; 327 struct bridge_mcast_own_query ip4_own_query; 328 struct bridge_mcast_querier ip4_querier; 329 #if IS_ENABLED(CONFIG_IPV6) 330 struct bridge_mcast_other_query ip6_other_query; 331 struct bridge_mcast_own_query ip6_own_query; 332 struct bridge_mcast_querier ip6_querier; 333 #endif /* IS_ENABLED(CONFIG_IPV6) */ 334 #endif 335 336 struct timer_list hello_timer; 337 struct timer_list tcn_timer; 338 struct timer_list topology_change_timer; 339 struct timer_list gc_timer; 340 struct kobject *ifobj; 341 u32 auto_cnt; 342 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 343 struct net_bridge_vlan_group __rcu *vlgrp; 344 u8 vlan_enabled; 345 __be16 vlan_proto; 346 u16 default_pvid; 347 #endif 348 }; 349 350 struct br_input_skb_cb { 351 struct net_device *brdev; 352 353 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 354 int igmp; 355 int mrouters_only; 356 #endif 357 358 bool proxyarp_replied; 359 360 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 361 bool vlan_filtered; 362 #endif 363 }; 364 365 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 366 367 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 368 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 369 #else 370 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 371 #endif 372 373 #define br_printk(level, br, format, args...) \ 374 printk(level "%s: " format, (br)->dev->name, ##args) 375 376 #define br_err(__br, format, args...) \ 377 br_printk(KERN_ERR, __br, format, ##args) 378 #define br_warn(__br, format, args...) \ 379 br_printk(KERN_WARNING, __br, format, ##args) 380 #define br_notice(__br, format, args...) \ 381 br_printk(KERN_NOTICE, __br, format, ##args) 382 #define br_info(__br, format, args...) \ 383 br_printk(KERN_INFO, __br, format, ##args) 384 385 #define br_debug(br, format, args...) \ 386 pr_debug("%s: " format, (br)->dev->name, ##args) 387 388 /* called under bridge lock */ 389 static inline int br_is_root_bridge(const struct net_bridge *br) 390 { 391 return !memcmp(&br->bridge_id, &br->designated_root, 8); 392 } 393 394 /* check if a VLAN entry is global */ 395 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 396 { 397 return v->flags & BRIDGE_VLAN_INFO_MASTER; 398 } 399 400 /* check if a VLAN entry is used by the bridge */ 401 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 402 { 403 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 404 } 405 406 /* check if we should use the vlan entry, returns false if it's only context */ 407 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 408 { 409 if (br_vlan_is_master(v)) { 410 if (br_vlan_is_brentry(v)) 411 return true; 412 else 413 return false; 414 } 415 416 return true; 417 } 418 419 /* br_device.c */ 420 void br_dev_setup(struct net_device *dev); 421 void br_dev_delete(struct net_device *dev, struct list_head *list); 422 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 423 #ifdef CONFIG_NET_POLL_CONTROLLER 424 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 425 struct sk_buff *skb) 426 { 427 struct netpoll *np = p->np; 428 429 if (np) 430 netpoll_send_skb(np, skb); 431 } 432 433 int br_netpoll_enable(struct net_bridge_port *p); 434 void br_netpoll_disable(struct net_bridge_port *p); 435 #else 436 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 437 struct sk_buff *skb) 438 { 439 } 440 441 static inline int br_netpoll_enable(struct net_bridge_port *p) 442 { 443 return 0; 444 } 445 446 static inline void br_netpoll_disable(struct net_bridge_port *p) 447 { 448 } 449 #endif 450 451 /* br_fdb.c */ 452 int br_fdb_init(void); 453 void br_fdb_fini(void); 454 void br_fdb_flush(struct net_bridge *br); 455 void br_fdb_find_delete_local(struct net_bridge *br, 456 const struct net_bridge_port *p, 457 const unsigned char *addr, u16 vid); 458 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 459 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 460 void br_fdb_cleanup(unsigned long arg); 461 void br_fdb_delete_by_port(struct net_bridge *br, 462 const struct net_bridge_port *p, u16 vid, int do_all); 463 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 464 const unsigned char *addr, __u16 vid); 465 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 466 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 467 unsigned long off); 468 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 469 const unsigned char *addr, u16 vid); 470 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 471 const unsigned char *addr, u16 vid, bool added_by_user); 472 473 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 474 struct net_device *dev, const unsigned char *addr, u16 vid); 475 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 476 const unsigned char *addr, u16 vid, u16 nlh_flags); 477 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 478 struct net_device *dev, struct net_device *fdev, int idx); 479 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 480 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 481 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 482 const unsigned char *addr, u16 vid); 483 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 484 const unsigned char *addr, u16 vid); 485 486 /* br_forward.c */ 487 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 488 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 489 void br_forward(const struct net_bridge_port *to, 490 struct sk_buff *skb, struct sk_buff *skb0); 491 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 492 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 493 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 494 struct sk_buff *skb2, bool unicast); 495 496 /* br_if.c */ 497 void br_port_carrier_check(struct net_bridge_port *p); 498 int br_add_bridge(struct net *net, const char *name); 499 int br_del_bridge(struct net *net, const char *name); 500 int br_add_if(struct net_bridge *br, struct net_device *dev); 501 int br_del_if(struct net_bridge *br, struct net_device *dev); 502 int br_min_mtu(const struct net_bridge *br); 503 netdev_features_t br_features_recompute(struct net_bridge *br, 504 netdev_features_t features); 505 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 506 void br_manage_promisc(struct net_bridge *br); 507 508 /* br_input.c */ 509 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 510 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 511 512 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 513 { 514 return rcu_dereference(dev->rx_handler) == br_handle_frame; 515 } 516 517 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 518 { 519 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 520 } 521 522 /* br_ioctl.c */ 523 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 524 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 525 void __user *arg); 526 527 /* br_multicast.c */ 528 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 529 extern unsigned int br_mdb_rehash_seq; 530 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 531 struct sk_buff *skb, u16 vid); 532 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 533 struct sk_buff *skb, u16 vid); 534 void br_multicast_add_port(struct net_bridge_port *port); 535 void br_multicast_del_port(struct net_bridge_port *port); 536 void br_multicast_enable_port(struct net_bridge_port *port); 537 void br_multicast_disable_port(struct net_bridge_port *port); 538 void br_multicast_init(struct net_bridge *br); 539 void br_multicast_open(struct net_bridge *br); 540 void br_multicast_stop(struct net_bridge *br); 541 void br_multicast_dev_del(struct net_bridge *br); 542 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 543 struct sk_buff *skb); 544 void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 545 struct sk_buff *skb, struct sk_buff *skb2); 546 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 547 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 548 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 549 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 550 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 551 struct net_bridge_mdb_entry * 552 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 553 struct net_bridge_mdb_entry * 554 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 555 struct br_ip *group); 556 void br_multicast_free_pg(struct rcu_head *head); 557 struct net_bridge_port_group * 558 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 559 struct net_bridge_port_group __rcu *next, 560 unsigned char flags); 561 void br_mdb_init(void); 562 void br_mdb_uninit(void); 563 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 564 struct br_ip *group, int type, u8 flags); 565 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 566 int type); 567 568 #define mlock_dereference(X, br) \ 569 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 570 571 static inline bool br_multicast_is_router(struct net_bridge *br) 572 { 573 return br->multicast_router == 2 || 574 (br->multicast_router == 1 && 575 timer_pending(&br->multicast_router_timer)); 576 } 577 578 static inline bool 579 __br_multicast_querier_exists(struct net_bridge *br, 580 struct bridge_mcast_other_query *querier) 581 { 582 return time_is_before_jiffies(querier->delay_time) && 583 (br->multicast_querier || timer_pending(&querier->timer)); 584 } 585 586 static inline bool br_multicast_querier_exists(struct net_bridge *br, 587 struct ethhdr *eth) 588 { 589 switch (eth->h_proto) { 590 case (htons(ETH_P_IP)): 591 return __br_multicast_querier_exists(br, &br->ip4_other_query); 592 #if IS_ENABLED(CONFIG_IPV6) 593 case (htons(ETH_P_IPV6)): 594 return __br_multicast_querier_exists(br, &br->ip6_other_query); 595 #endif 596 default: 597 return false; 598 } 599 } 600 #else 601 static inline int br_multicast_rcv(struct net_bridge *br, 602 struct net_bridge_port *port, 603 struct sk_buff *skb, 604 u16 vid) 605 { 606 return 0; 607 } 608 609 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 610 struct sk_buff *skb, u16 vid) 611 { 612 return NULL; 613 } 614 615 static inline void br_multicast_add_port(struct net_bridge_port *port) 616 { 617 } 618 619 static inline void br_multicast_del_port(struct net_bridge_port *port) 620 { 621 } 622 623 static inline void br_multicast_enable_port(struct net_bridge_port *port) 624 { 625 } 626 627 static inline void br_multicast_disable_port(struct net_bridge_port *port) 628 { 629 } 630 631 static inline void br_multicast_init(struct net_bridge *br) 632 { 633 } 634 635 static inline void br_multicast_open(struct net_bridge *br) 636 { 637 } 638 639 static inline void br_multicast_stop(struct net_bridge *br) 640 { 641 } 642 643 static inline void br_multicast_dev_del(struct net_bridge *br) 644 { 645 } 646 647 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 648 struct sk_buff *skb) 649 { 650 } 651 652 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 653 struct sk_buff *skb, 654 struct sk_buff *skb2) 655 { 656 } 657 static inline bool br_multicast_is_router(struct net_bridge *br) 658 { 659 return 0; 660 } 661 static inline bool br_multicast_querier_exists(struct net_bridge *br, 662 struct ethhdr *eth) 663 { 664 return false; 665 } 666 static inline void br_mdb_init(void) 667 { 668 } 669 static inline void br_mdb_uninit(void) 670 { 671 } 672 #endif 673 674 /* br_vlan.c */ 675 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 676 bool br_allowed_ingress(const struct net_bridge *br, 677 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 678 u16 *vid); 679 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 680 const struct sk_buff *skb); 681 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 682 struct sk_buff *br_handle_vlan(struct net_bridge *br, 683 struct net_bridge_vlan_group *vg, 684 struct sk_buff *skb); 685 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 686 int br_vlan_delete(struct net_bridge *br, u16 vid); 687 void br_vlan_flush(struct net_bridge *br); 688 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 689 void br_recalculate_fwd_mask(struct net_bridge *br); 690 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 691 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 692 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 693 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 694 int br_vlan_init(struct net_bridge *br); 695 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 696 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 697 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 698 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 699 void nbp_vlan_flush(struct net_bridge_port *port); 700 int nbp_vlan_init(struct net_bridge_port *port); 701 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 702 703 static inline struct net_bridge_vlan_group *br_vlan_group( 704 const struct net_bridge *br) 705 { 706 return rtnl_dereference(br->vlgrp); 707 } 708 709 static inline struct net_bridge_vlan_group *nbp_vlan_group( 710 const struct net_bridge_port *p) 711 { 712 return rtnl_dereference(p->vlgrp); 713 } 714 715 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 716 const struct net_bridge *br) 717 { 718 return rcu_dereference(br->vlgrp); 719 } 720 721 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 722 const struct net_bridge_port *p) 723 { 724 return rcu_dereference(p->vlgrp); 725 } 726 727 /* Since bridge now depends on 8021Q module, but the time bridge sees the 728 * skb, the vlan tag will always be present if the frame was tagged. 729 */ 730 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 731 { 732 int err = 0; 733 734 if (skb_vlan_tag_present(skb)) { 735 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 736 } else { 737 *vid = 0; 738 err = -EINVAL; 739 } 740 741 return err; 742 } 743 744 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 745 { 746 if (!vg) 747 return 0; 748 749 smp_rmb(); 750 return vg->pvid; 751 } 752 753 static inline int br_vlan_enabled(struct net_bridge *br) 754 { 755 return br->vlan_enabled; 756 } 757 #else 758 static inline bool br_allowed_ingress(const struct net_bridge *br, 759 struct net_bridge_vlan_group *vg, 760 struct sk_buff *skb, 761 u16 *vid) 762 { 763 return true; 764 } 765 766 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 767 const struct sk_buff *skb) 768 { 769 return true; 770 } 771 772 static inline bool br_should_learn(struct net_bridge_port *p, 773 struct sk_buff *skb, u16 *vid) 774 { 775 return true; 776 } 777 778 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 779 struct net_bridge_vlan_group *vg, 780 struct sk_buff *skb) 781 { 782 return skb; 783 } 784 785 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 786 { 787 return -EOPNOTSUPP; 788 } 789 790 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 791 { 792 return -EOPNOTSUPP; 793 } 794 795 static inline void br_vlan_flush(struct net_bridge *br) 796 { 797 } 798 799 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 800 { 801 } 802 803 static inline int br_vlan_init(struct net_bridge *br) 804 { 805 return 0; 806 } 807 808 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 809 { 810 return -EOPNOTSUPP; 811 } 812 813 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 814 { 815 return -EOPNOTSUPP; 816 } 817 818 static inline void nbp_vlan_flush(struct net_bridge_port *port) 819 { 820 } 821 822 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 823 u16 vid) 824 { 825 return NULL; 826 } 827 828 static inline int nbp_vlan_init(struct net_bridge_port *port) 829 { 830 return 0; 831 } 832 833 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 834 { 835 return 0; 836 } 837 838 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 839 { 840 return 0; 841 } 842 843 static inline int br_vlan_enabled(struct net_bridge *br) 844 { 845 return 0; 846 } 847 848 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 849 unsigned long val) 850 { 851 return -EOPNOTSUPP; 852 } 853 854 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 855 u32 filter_mask) 856 { 857 return 0; 858 } 859 860 static inline struct net_bridge_vlan_group *br_vlan_group( 861 const struct net_bridge *br) 862 { 863 return NULL; 864 } 865 866 static inline struct net_bridge_vlan_group *nbp_vlan_group( 867 const struct net_bridge_port *p) 868 { 869 return NULL; 870 } 871 872 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 873 const struct net_bridge *br) 874 { 875 return NULL; 876 } 877 878 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 879 const struct net_bridge_port *p) 880 { 881 return NULL; 882 } 883 884 #endif 885 886 struct nf_br_ops { 887 int (*br_dev_xmit_hook)(struct sk_buff *skb); 888 }; 889 extern const struct nf_br_ops __rcu *nf_br_ops; 890 891 /* br_netfilter.c */ 892 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 893 int br_nf_core_init(void); 894 void br_nf_core_fini(void); 895 void br_netfilter_rtable_init(struct net_bridge *); 896 #else 897 static inline int br_nf_core_init(void) { return 0; } 898 static inline void br_nf_core_fini(void) {} 899 #define br_netfilter_rtable_init(x) 900 #endif 901 902 /* br_stp.c */ 903 void br_log_state(const struct net_bridge_port *p); 904 void br_set_state(struct net_bridge_port *p, unsigned int state); 905 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 906 void br_init_port(struct net_bridge_port *p); 907 void br_become_designated_port(struct net_bridge_port *p); 908 909 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 910 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 911 int br_set_hello_time(struct net_bridge *br, unsigned long x); 912 int br_set_max_age(struct net_bridge *br, unsigned long x); 913 int br_set_ageing_time(struct net_bridge *br, u32 ageing_time); 914 915 916 /* br_stp_if.c */ 917 void br_stp_enable_bridge(struct net_bridge *br); 918 void br_stp_disable_bridge(struct net_bridge *br); 919 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 920 void br_stp_enable_port(struct net_bridge_port *p); 921 void br_stp_disable_port(struct net_bridge_port *p); 922 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 923 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 924 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 925 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 926 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 927 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 928 929 /* br_stp_bpdu.c */ 930 struct stp_proto; 931 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 932 struct net_device *dev); 933 934 /* br_stp_timer.c */ 935 void br_stp_timer_init(struct net_bridge *br); 936 void br_stp_port_timer_init(struct net_bridge_port *p); 937 unsigned long br_timer_value(const struct timer_list *timer); 938 939 /* br.c */ 940 #if IS_ENABLED(CONFIG_ATM_LANE) 941 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 942 #endif 943 944 /* br_netlink.c */ 945 extern struct rtnl_link_ops br_link_ops; 946 int br_netlink_init(void); 947 void br_netlink_fini(void); 948 void br_ifinfo_notify(int event, struct net_bridge_port *port); 949 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 950 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 951 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 952 u32 filter_mask, int nlflags); 953 954 #ifdef CONFIG_SYSFS 955 /* br_sysfs_if.c */ 956 extern const struct sysfs_ops brport_sysfs_ops; 957 int br_sysfs_addif(struct net_bridge_port *p); 958 int br_sysfs_renameif(struct net_bridge_port *p); 959 960 /* br_sysfs_br.c */ 961 int br_sysfs_addbr(struct net_device *dev); 962 void br_sysfs_delbr(struct net_device *dev); 963 964 #else 965 966 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 967 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 968 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 969 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 970 #endif /* CONFIG_SYSFS */ 971 972 #endif 973