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 <linux/if_vlan.h> 22 23#define BR_HASH_BITS 8 24#define BR_HASH_SIZE (1 << BR_HASH_BITS) 25 26#define BR_HOLD_TIME (1*HZ) 27 28#define BR_PORT_BITS 10 29#define BR_MAX_PORTS (1<<BR_PORT_BITS) 30#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID) 31 32#define BR_VERSION "2.3" 33 34/* Control of forwarding link local multicast */ 35#define BR_GROUPFWD_DEFAULT 0 36/* Don't allow forwarding control protocols like STP and LLDP */ 37#define BR_GROUPFWD_RESTRICTED 0x4007u 38/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 39#define BR_GROUPFWD_8021AD 0xB801u 40 41/* Path to usermode spanning tree program */ 42#define BR_STP_PROG "/sbin/bridge-stp" 43 44typedef struct bridge_id bridge_id; 45typedef struct mac_addr mac_addr; 46typedef __u16 port_id; 47 48struct bridge_id 49{ 50 unsigned char prio[2]; 51 unsigned char addr[ETH_ALEN]; 52}; 53 54struct mac_addr 55{ 56 unsigned char addr[ETH_ALEN]; 57}; 58 59#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 60/* our own querier */ 61struct bridge_mcast_own_query { 62 struct timer_list timer; 63 u32 startup_sent; 64}; 65 66/* other querier */ 67struct bridge_mcast_other_query { 68 struct timer_list timer; 69 unsigned long delay_time; 70}; 71 72/* selected querier */ 73struct bridge_mcast_querier { 74 struct br_ip addr; 75 struct net_bridge_port __rcu *port; 76}; 77#endif 78 79struct net_port_vlans { 80 u16 port_idx; 81 u16 pvid; 82 union { 83 struct net_bridge_port *port; 84 struct net_bridge *br; 85 } parent; 86 struct rcu_head rcu; 87 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN]; 88 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN]; 89 u16 num_vlans; 90}; 91 92struct net_bridge_fdb_entry 93{ 94 struct hlist_node hlist; 95 struct net_bridge_port *dst; 96 97 struct rcu_head rcu; 98 unsigned long updated; 99 unsigned long used; 100 mac_addr addr; 101 unsigned char is_local:1, 102 is_static:1, 103 added_by_user:1, 104 added_by_external_learn:1; 105 __u16 vlan_id; 106}; 107 108struct net_bridge_port_group { 109 struct net_bridge_port *port; 110 struct net_bridge_port_group __rcu *next; 111 struct hlist_node mglist; 112 struct rcu_head rcu; 113 struct timer_list timer; 114 struct br_ip addr; 115 unsigned char state; 116}; 117 118struct net_bridge_mdb_entry 119{ 120 struct hlist_node hlist[2]; 121 struct net_bridge *br; 122 struct net_bridge_port_group __rcu *ports; 123 struct rcu_head rcu; 124 struct timer_list timer; 125 struct br_ip addr; 126 bool mglist; 127}; 128 129struct net_bridge_mdb_htable 130{ 131 struct hlist_head *mhash; 132 struct rcu_head rcu; 133 struct net_bridge_mdb_htable *old; 134 u32 size; 135 u32 max; 136 u32 secret; 137 u32 ver; 138}; 139 140struct net_bridge_port 141{ 142 struct net_bridge *br; 143 struct net_device *dev; 144 struct list_head list; 145 146 /* STP */ 147 u8 priority; 148 u8 state; 149 u16 port_no; 150 unsigned char topology_change_ack; 151 unsigned char config_pending; 152 port_id port_id; 153 port_id designated_port; 154 bridge_id designated_root; 155 bridge_id designated_bridge; 156 u32 path_cost; 157 u32 designated_cost; 158 unsigned long designated_age; 159 160 struct timer_list forward_delay_timer; 161 struct timer_list hold_timer; 162 struct timer_list message_age_timer; 163 struct kobject kobj; 164 struct rcu_head rcu; 165 166 unsigned long flags; 167 168#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 169 struct bridge_mcast_own_query ip4_own_query; 170#if IS_ENABLED(CONFIG_IPV6) 171 struct bridge_mcast_own_query ip6_own_query; 172#endif /* IS_ENABLED(CONFIG_IPV6) */ 173 unsigned char multicast_router; 174 struct timer_list multicast_router_timer; 175 struct hlist_head mglist; 176 struct hlist_node rlist; 177#endif 178 179#ifdef CONFIG_SYSFS 180 char sysfs_name[IFNAMSIZ]; 181#endif 182 183#ifdef CONFIG_NET_POLL_CONTROLLER 184 struct netpoll *np; 185#endif 186#ifdef CONFIG_BRIDGE_VLAN_FILTERING 187 struct net_port_vlans __rcu *vlan_info; 188#endif 189}; 190 191#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 192#define br_promisc_port(p) ((p)->flags & BR_PROMISC) 193 194#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 195 196static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 197{ 198 return rcu_dereference(dev->rx_handler_data); 199} 200 201static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 202{ 203 return br_port_exists(dev) ? 204 rtnl_dereference(dev->rx_handler_data) : NULL; 205} 206 207struct net_bridge 208{ 209 spinlock_t lock; 210 struct list_head port_list; 211 struct net_device *dev; 212 213 struct pcpu_sw_netstats __percpu *stats; 214 spinlock_t hash_lock; 215 struct hlist_head hash[BR_HASH_SIZE]; 216#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 217 struct rtable fake_rtable; 218 bool nf_call_iptables; 219 bool nf_call_ip6tables; 220 bool nf_call_arptables; 221#endif 222 u16 group_fwd_mask; 223 u16 group_fwd_mask_required; 224 225 /* STP */ 226 bridge_id designated_root; 227 bridge_id bridge_id; 228 u32 root_path_cost; 229 unsigned long max_age; 230 unsigned long hello_time; 231 unsigned long forward_delay; 232 unsigned long bridge_max_age; 233 unsigned long ageing_time; 234 unsigned long bridge_hello_time; 235 unsigned long bridge_forward_delay; 236 237 u8 group_addr[ETH_ALEN]; 238 bool group_addr_set; 239 u16 root_port; 240 241 enum { 242 BR_NO_STP, /* no spanning tree */ 243 BR_KERNEL_STP, /* old STP in kernel */ 244 BR_USER_STP, /* new RSTP in userspace */ 245 } stp_enabled; 246 247 unsigned char topology_change; 248 unsigned char topology_change_detected; 249 250#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 251 unsigned char multicast_router; 252 253 u8 multicast_disabled:1; 254 u8 multicast_querier:1; 255 u8 multicast_query_use_ifaddr:1; 256 257 u32 hash_elasticity; 258 u32 hash_max; 259 260 u32 multicast_last_member_count; 261 u32 multicast_startup_query_count; 262 263 unsigned long multicast_last_member_interval; 264 unsigned long multicast_membership_interval; 265 unsigned long multicast_querier_interval; 266 unsigned long multicast_query_interval; 267 unsigned long multicast_query_response_interval; 268 unsigned long multicast_startup_query_interval; 269 270 spinlock_t multicast_lock; 271 struct net_bridge_mdb_htable __rcu *mdb; 272 struct hlist_head router_list; 273 274 struct timer_list multicast_router_timer; 275 struct bridge_mcast_other_query ip4_other_query; 276 struct bridge_mcast_own_query ip4_own_query; 277 struct bridge_mcast_querier ip4_querier; 278#if IS_ENABLED(CONFIG_IPV6) 279 struct bridge_mcast_other_query ip6_other_query; 280 struct bridge_mcast_own_query ip6_own_query; 281 struct bridge_mcast_querier ip6_querier; 282#endif /* IS_ENABLED(CONFIG_IPV6) */ 283#endif 284 285 struct timer_list hello_timer; 286 struct timer_list tcn_timer; 287 struct timer_list topology_change_timer; 288 struct timer_list gc_timer; 289 struct kobject *ifobj; 290 u32 auto_cnt; 291#ifdef CONFIG_BRIDGE_VLAN_FILTERING 292 u8 vlan_enabled; 293 __be16 vlan_proto; 294 u16 default_pvid; 295 struct net_port_vlans __rcu *vlan_info; 296#endif 297}; 298 299struct br_input_skb_cb { 300 struct net_device *brdev; 301 302#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 303 int igmp; 304 int mrouters_only; 305#endif 306 307 u16 frag_max_size; 308 bool proxyarp_replied; 309 310#ifdef CONFIG_BRIDGE_VLAN_FILTERING 311 bool vlan_filtered; 312#endif 313}; 314 315#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 316 317#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 318# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 319#else 320# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 321#endif 322 323#define br_printk(level, br, format, args...) \ 324 printk(level "%s: " format, (br)->dev->name, ##args) 325 326#define br_err(__br, format, args...) \ 327 br_printk(KERN_ERR, __br, format, ##args) 328#define br_warn(__br, format, args...) \ 329 br_printk(KERN_WARNING, __br, format, ##args) 330#define br_notice(__br, format, args...) \ 331 br_printk(KERN_NOTICE, __br, format, ##args) 332#define br_info(__br, format, args...) \ 333 br_printk(KERN_INFO, __br, format, ##args) 334 335#define br_debug(br, format, args...) \ 336 pr_debug("%s: " format, (br)->dev->name, ##args) 337 338/* called under bridge lock */ 339static inline int br_is_root_bridge(const struct net_bridge *br) 340{ 341 return !memcmp(&br->bridge_id, &br->designated_root, 8); 342} 343 344/* br_device.c */ 345void br_dev_setup(struct net_device *dev); 346void br_dev_delete(struct net_device *dev, struct list_head *list); 347netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 348#ifdef CONFIG_NET_POLL_CONTROLLER 349static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 350 struct sk_buff *skb) 351{ 352 struct netpoll *np = p->np; 353 354 if (np) 355 netpoll_send_skb(np, skb); 356} 357 358int br_netpoll_enable(struct net_bridge_port *p); 359void br_netpoll_disable(struct net_bridge_port *p); 360#else 361static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 362 struct sk_buff *skb) 363{ 364} 365 366static inline int br_netpoll_enable(struct net_bridge_port *p) 367{ 368 return 0; 369} 370 371static inline void br_netpoll_disable(struct net_bridge_port *p) 372{ 373} 374#endif 375 376/* br_fdb.c */ 377int br_fdb_init(void); 378void br_fdb_fini(void); 379void br_fdb_flush(struct net_bridge *br); 380void br_fdb_find_delete_local(struct net_bridge *br, 381 const struct net_bridge_port *p, 382 const unsigned char *addr, u16 vid); 383void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 384void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 385void br_fdb_cleanup(unsigned long arg); 386void br_fdb_delete_by_port(struct net_bridge *br, 387 const struct net_bridge_port *p, int do_all); 388struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 389 const unsigned char *addr, __u16 vid); 390int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 391int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 392 unsigned long off); 393int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 394 const unsigned char *addr, u16 vid); 395void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 396 const unsigned char *addr, u16 vid, bool added_by_user); 397 398int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 399 struct net_device *dev, const unsigned char *addr, u16 vid); 400int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 401 const unsigned char *addr, u16 vid, u16 nlh_flags); 402int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 403 struct net_device *dev, struct net_device *fdev, int idx); 404int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 405void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 406int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 407 const unsigned char *addr, u16 vid); 408int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 409 const unsigned char *addr, u16 vid); 410 411/* br_forward.c */ 412void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb); 413int br_dev_queue_push_xmit(struct sock *sk, struct sk_buff *skb); 414void br_forward(const struct net_bridge_port *to, 415 struct sk_buff *skb, struct sk_buff *skb0); 416int br_forward_finish(struct sock *sk, struct sk_buff *skb); 417void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast); 418void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, 419 struct sk_buff *skb2, bool unicast); 420 421/* br_if.c */ 422void br_port_carrier_check(struct net_bridge_port *p); 423int br_add_bridge(struct net *net, const char *name); 424int br_del_bridge(struct net *net, const char *name); 425int br_add_if(struct net_bridge *br, struct net_device *dev); 426int br_del_if(struct net_bridge *br, struct net_device *dev); 427int br_min_mtu(const struct net_bridge *br); 428netdev_features_t br_features_recompute(struct net_bridge *br, 429 netdev_features_t features); 430void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 431void br_manage_promisc(struct net_bridge *br); 432 433/* br_input.c */ 434int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb); 435rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 436 437static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 438{ 439 return rcu_dereference(dev->rx_handler) == br_handle_frame; 440} 441 442static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 443{ 444 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 445} 446 447/* br_ioctl.c */ 448int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 449int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 450 void __user *arg); 451 452/* br_multicast.c */ 453#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 454extern unsigned int br_mdb_rehash_seq; 455int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 456 struct sk_buff *skb, u16 vid); 457struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 458 struct sk_buff *skb, u16 vid); 459void br_multicast_add_port(struct net_bridge_port *port); 460void br_multicast_del_port(struct net_bridge_port *port); 461void br_multicast_enable_port(struct net_bridge_port *port); 462void br_multicast_disable_port(struct net_bridge_port *port); 463void br_multicast_init(struct net_bridge *br); 464void br_multicast_open(struct net_bridge *br); 465void br_multicast_stop(struct net_bridge *br); 466void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 467 struct sk_buff *skb); 468void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 469 struct sk_buff *skb, struct sk_buff *skb2); 470int br_multicast_set_router(struct net_bridge *br, unsigned long val); 471int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 472int br_multicast_toggle(struct net_bridge *br, unsigned long val); 473int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 474int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 475struct net_bridge_mdb_entry * 476br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 477struct net_bridge_mdb_entry * 478br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 479 struct br_ip *group); 480void br_multicast_free_pg(struct rcu_head *head); 481struct net_bridge_port_group * 482br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 483 struct net_bridge_port_group __rcu *next, 484 unsigned char state); 485void br_mdb_init(void); 486void br_mdb_uninit(void); 487void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 488 struct br_ip *group, int type); 489 490#define mlock_dereference(X, br) \ 491 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 492 493static inline bool br_multicast_is_router(struct net_bridge *br) 494{ 495 return br->multicast_router == 2 || 496 (br->multicast_router == 1 && 497 timer_pending(&br->multicast_router_timer)); 498} 499 500static inline bool 501__br_multicast_querier_exists(struct net_bridge *br, 502 struct bridge_mcast_other_query *querier) 503{ 504 return time_is_before_jiffies(querier->delay_time) && 505 (br->multicast_querier || timer_pending(&querier->timer)); 506} 507 508static inline bool br_multicast_querier_exists(struct net_bridge *br, 509 struct ethhdr *eth) 510{ 511 switch (eth->h_proto) { 512 case (htons(ETH_P_IP)): 513 return __br_multicast_querier_exists(br, &br->ip4_other_query); 514#if IS_ENABLED(CONFIG_IPV6) 515 case (htons(ETH_P_IPV6)): 516 return __br_multicast_querier_exists(br, &br->ip6_other_query); 517#endif 518 default: 519 return false; 520 } 521} 522#else 523static inline int br_multicast_rcv(struct net_bridge *br, 524 struct net_bridge_port *port, 525 struct sk_buff *skb, 526 u16 vid) 527{ 528 return 0; 529} 530 531static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 532 struct sk_buff *skb, u16 vid) 533{ 534 return NULL; 535} 536 537static inline void br_multicast_add_port(struct net_bridge_port *port) 538{ 539} 540 541static inline void br_multicast_del_port(struct net_bridge_port *port) 542{ 543} 544 545static inline void br_multicast_enable_port(struct net_bridge_port *port) 546{ 547} 548 549static inline void br_multicast_disable_port(struct net_bridge_port *port) 550{ 551} 552 553static inline void br_multicast_init(struct net_bridge *br) 554{ 555} 556 557static inline void br_multicast_open(struct net_bridge *br) 558{ 559} 560 561static inline void br_multicast_stop(struct net_bridge *br) 562{ 563} 564 565static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, 566 struct sk_buff *skb) 567{ 568} 569 570static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, 571 struct sk_buff *skb, 572 struct sk_buff *skb2) 573{ 574} 575static inline bool br_multicast_is_router(struct net_bridge *br) 576{ 577 return 0; 578} 579static inline bool br_multicast_querier_exists(struct net_bridge *br, 580 struct ethhdr *eth) 581{ 582 return false; 583} 584static inline void br_mdb_init(void) 585{ 586} 587static inline void br_mdb_uninit(void) 588{ 589} 590#endif 591 592/* br_vlan.c */ 593#ifdef CONFIG_BRIDGE_VLAN_FILTERING 594bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 595 struct sk_buff *skb, u16 *vid); 596bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v, 597 const struct sk_buff *skb); 598bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 599struct sk_buff *br_handle_vlan(struct net_bridge *br, 600 const struct net_port_vlans *v, 601 struct sk_buff *skb); 602int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); 603int br_vlan_delete(struct net_bridge *br, u16 vid); 604void br_vlan_flush(struct net_bridge *br); 605bool br_vlan_find(struct net_bridge *br, u16 vid); 606void br_recalculate_fwd_mask(struct net_bridge *br); 607int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 608int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 609int br_vlan_init(struct net_bridge *br); 610int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 611int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); 612int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 613void nbp_vlan_flush(struct net_bridge_port *port); 614bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); 615int nbp_vlan_init(struct net_bridge_port *port); 616 617static inline struct net_port_vlans *br_get_vlan_info( 618 const struct net_bridge *br) 619{ 620 return rcu_dereference_rtnl(br->vlan_info); 621} 622 623static inline struct net_port_vlans *nbp_get_vlan_info( 624 const struct net_bridge_port *p) 625{ 626 return rcu_dereference_rtnl(p->vlan_info); 627} 628 629/* Since bridge now depends on 8021Q module, but the time bridge sees the 630 * skb, the vlan tag will always be present if the frame was tagged. 631 */ 632static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 633{ 634 int err = 0; 635 636 if (skb_vlan_tag_present(skb)) 637 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 638 else { 639 *vid = 0; 640 err = -EINVAL; 641 } 642 643 return err; 644} 645 646static inline u16 br_get_pvid(const struct net_port_vlans *v) 647{ 648 if (!v) 649 return 0; 650 651 smp_rmb(); 652 return v->pvid; 653} 654 655static inline int br_vlan_enabled(struct net_bridge *br) 656{ 657 return br->vlan_enabled; 658} 659#else 660static inline bool br_allowed_ingress(struct net_bridge *br, 661 struct net_port_vlans *v, 662 struct sk_buff *skb, 663 u16 *vid) 664{ 665 return true; 666} 667 668static inline bool br_allowed_egress(struct net_bridge *br, 669 const struct net_port_vlans *v, 670 const struct sk_buff *skb) 671{ 672 return true; 673} 674 675static inline bool br_should_learn(struct net_bridge_port *p, 676 struct sk_buff *skb, u16 *vid) 677{ 678 return true; 679} 680 681static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 682 const struct net_port_vlans *v, 683 struct sk_buff *skb) 684{ 685 return skb; 686} 687 688static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 689{ 690 return -EOPNOTSUPP; 691} 692 693static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 694{ 695 return -EOPNOTSUPP; 696} 697 698static inline void br_vlan_flush(struct net_bridge *br) 699{ 700} 701 702static inline bool br_vlan_find(struct net_bridge *br, u16 vid) 703{ 704 return false; 705} 706 707static inline void br_recalculate_fwd_mask(struct net_bridge *br) 708{ 709} 710 711static inline int br_vlan_init(struct net_bridge *br) 712{ 713 return 0; 714} 715 716static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 717{ 718 return -EOPNOTSUPP; 719} 720 721static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 722{ 723 return -EOPNOTSUPP; 724} 725 726static inline void nbp_vlan_flush(struct net_bridge_port *port) 727{ 728} 729 730static inline struct net_port_vlans *br_get_vlan_info( 731 const struct net_bridge *br) 732{ 733 return NULL; 734} 735static inline struct net_port_vlans *nbp_get_vlan_info( 736 const struct net_bridge_port *p) 737{ 738 return NULL; 739} 740 741static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 742{ 743 return false; 744} 745 746static inline int nbp_vlan_init(struct net_bridge_port *port) 747{ 748 return 0; 749} 750 751static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 752{ 753 return 0; 754} 755static inline u16 br_get_pvid(const struct net_port_vlans *v) 756{ 757 return 0; 758} 759 760static inline int br_vlan_enabled(struct net_bridge *br) 761{ 762 return 0; 763} 764#endif 765 766struct nf_br_ops { 767 int (*br_dev_xmit_hook)(struct sk_buff *skb); 768}; 769extern const struct nf_br_ops __rcu *nf_br_ops; 770 771/* br_netfilter.c */ 772#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 773int br_nf_core_init(void); 774void br_nf_core_fini(void); 775void br_netfilter_rtable_init(struct net_bridge *); 776#else 777static inline int br_nf_core_init(void) { return 0; } 778static inline void br_nf_core_fini(void) {} 779#define br_netfilter_rtable_init(x) 780#endif 781 782/* br_stp.c */ 783void br_log_state(const struct net_bridge_port *p); 784void br_set_state(struct net_bridge_port *p, unsigned int state); 785struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 786void br_init_port(struct net_bridge_port *p); 787void br_become_designated_port(struct net_bridge_port *p); 788 789void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 790int br_set_forward_delay(struct net_bridge *br, unsigned long x); 791int br_set_hello_time(struct net_bridge *br, unsigned long x); 792int br_set_max_age(struct net_bridge *br, unsigned long x); 793 794 795/* br_stp_if.c */ 796void br_stp_enable_bridge(struct net_bridge *br); 797void br_stp_disable_bridge(struct net_bridge *br); 798void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 799void br_stp_enable_port(struct net_bridge_port *p); 800void br_stp_disable_port(struct net_bridge_port *p); 801bool br_stp_recalculate_bridge_id(struct net_bridge *br); 802void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 803void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 804int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 805int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 806ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 807 808/* br_stp_bpdu.c */ 809struct stp_proto; 810void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 811 struct net_device *dev); 812 813/* br_stp_timer.c */ 814void br_stp_timer_init(struct net_bridge *br); 815void br_stp_port_timer_init(struct net_bridge_port *p); 816unsigned long br_timer_value(const struct timer_list *timer); 817 818/* br.c */ 819#if IS_ENABLED(CONFIG_ATM_LANE) 820extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 821#endif 822 823/* br_netlink.c */ 824extern struct rtnl_link_ops br_link_ops; 825int br_netlink_init(void); 826void br_netlink_fini(void); 827void br_ifinfo_notify(int event, struct net_bridge_port *port); 828int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 829int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 830int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 831 u32 filter_mask, int nlflags); 832 833#ifdef CONFIG_SYSFS 834/* br_sysfs_if.c */ 835extern const struct sysfs_ops brport_sysfs_ops; 836int br_sysfs_addif(struct net_bridge_port *p); 837int br_sysfs_renameif(struct net_bridge_port *p); 838 839/* br_sysfs_br.c */ 840int br_sysfs_addbr(struct net_device *dev); 841void br_sysfs_delbr(struct net_device *dev); 842 843#else 844 845static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 846static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 847static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 848static inline void br_sysfs_delbr(struct net_device *dev) { return; } 849#endif /* CONFIG_SYSFS */ 850 851#endif 852