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