Pileus Git - ~andy/linux/blob - net/bridge/br_private.h

   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
  39 /* Path to usermode spanning tree program */
  40 #define BR_STP_PROG     "/sbin/bridge-stp"
  41
  42 typedef struct bridge_id bridge_id;
  43 typedef struct mac_addr mac_addr;
  44 typedef __u16 port_id;
  45
  46 struct bridge_id
  47 {
  48         unsigned char   prio[2];
  49         unsigned char   addr[6];
  50 };
  51
  52 struct mac_addr
  53 {
  54         unsigned char   addr[6];
  55 };
  56
  57 struct br_ip
  58 {
  59         union {
  60                 __be32  ip4;
  61 #if IS_ENABLED(CONFIG_IPV6)
  62                 struct in6_addr ip6;
  63 #endif
  64         } u;
  65         __be16          proto;
  66 };
  67
  68 struct net_port_vlans {
  69         u16                             port_idx;
  70         union {
  71                 struct net_bridge_port          *port;
  72                 struct net_bridge               *br;
  73         }                               parent;
  74         struct rcu_head                 rcu;
  75         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
  76         u16                             num_vlans;
  77 };
  78
  79 struct net_bridge_fdb_entry
  80 {
  81         struct hlist_node               hlist;
  82         struct net_bridge_port          *dst;
  83
  84         struct rcu_head                 rcu;
  85         unsigned long                   updated;
  86         unsigned long                   used;
  87         mac_addr                        addr;
  88         unsigned char                   is_local;
  89         unsigned char                   is_static;
  90 };
  91
  92 struct net_bridge_port_group {
  93         struct net_bridge_port          *port;
  94         struct net_bridge_port_group __rcu *next;
  95         struct hlist_node               mglist;
  96         struct rcu_head                 rcu;
  97         struct timer_list               timer;
  98         struct br_ip                    addr;
  99         unsigned char                   state;
 100 };
 101
 102 struct net_bridge_mdb_entry
 103 {
 104         struct hlist_node               hlist[2];
 105         struct net_bridge               *br;
 106         struct net_bridge_port_group __rcu *ports;
 107         struct rcu_head                 rcu;
 108         struct timer_list               timer;
 109         struct br_ip                    addr;
 110         bool                            mglist;
 111 };
 112
 113 struct net_bridge_mdb_htable
 114 {
 115         struct hlist_head               *mhash;
 116         struct rcu_head                 rcu;
 117         struct net_bridge_mdb_htable    *old;
 118         u32                             size;
 119         u32                             max;
 120         u32                             secret;
 121         u32                             ver;
 122 };
 123
 124 struct net_bridge_port
 125 {
 126         struct net_bridge               *br;
 127         struct net_device               *dev;
 128         struct list_head                list;
 129
 130         /* STP */
 131         u8                              priority;
 132         u8                              state;
 133         u16                             port_no;
 134         unsigned char                   topology_change_ack;
 135         unsigned char                   config_pending;
 136         port_id                         port_id;
 137         port_id                         designated_port;
 138         bridge_id                       designated_root;
 139         bridge_id                       designated_bridge;
 140         u32                             path_cost;
 141         u32                             designated_cost;
 142         unsigned long                   designated_age;
 143
 144         struct timer_list               forward_delay_timer;
 145         struct timer_list               hold_timer;
 146         struct timer_list               message_age_timer;
 147         struct kobject                  kobj;
 148         struct rcu_head                 rcu;
 149
 150         unsigned long                   flags;
 151 #define BR_HAIRPIN_MODE         0x00000001
 152 #define BR_BPDU_GUARD           0x00000002
 153 #define BR_ROOT_BLOCK           0x00000004
 154 #define BR_MULTICAST_FAST_LEAVE 0x00000008
 155
 156 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 157         u32                             multicast_startup_queries_sent;
 158         unsigned char                   multicast_router;
 159         struct timer_list               multicast_router_timer;
 160         struct timer_list               multicast_query_timer;
 161         struct hlist_head               mglist;
 162         struct hlist_node               rlist;
 163 #endif
 164
 165 #ifdef CONFIG_SYSFS
 166         char                            sysfs_name[IFNAMSIZ];
 167 #endif
 168
 169 #ifdef CONFIG_NET_POLL_CONTROLLER
 170         struct netpoll                  *np;
 171 #endif
 172 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 173         struct net_port_vlans __rcu     *vlan_info;
 174 #endif
 175 };
 176
 177 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 178
 179 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 180 {
 181         struct net_bridge_port *port =
 182                         rcu_dereference_rtnl(dev->rx_handler_data);
 183
 184         return br_port_exists(dev) ? port : NULL;
 185 }
 186
 187 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
 188 {
 189         return br_port_exists(dev) ?
 190                 rtnl_dereference(dev->rx_handler_data) : NULL;
 191 }
 192
 193 struct br_cpu_netstats {
 194         u64                     rx_packets;
 195         u64                     rx_bytes;
 196         u64                     tx_packets;
 197         u64                     tx_bytes;
 198         struct u64_stats_sync   syncp;
 199 };
 200
 201 struct net_bridge
 202 {
 203         spinlock_t                      lock;
 204         struct list_head                port_list;
 205         struct net_device               *dev;
 206
 207         struct br_cpu_netstats __percpu *stats;
 208         spinlock_t                      hash_lock;
 209         struct hlist_head               hash[BR_HASH_SIZE];
 210 #ifdef CONFIG_BRIDGE_NETFILTER
 211         struct rtable                   fake_rtable;
 212         bool                            nf_call_iptables;
 213         bool                            nf_call_ip6tables;
 214         bool                            nf_call_arptables;
 215 #endif
 216         u16                             group_fwd_mask;
 217
 218         /* STP */
 219         bridge_id                       designated_root;
 220         bridge_id                       bridge_id;
 221         u32                             root_path_cost;
 222         unsigned long                   max_age;
 223         unsigned long                   hello_time;
 224         unsigned long                   forward_delay;
 225         unsigned long                   bridge_max_age;
 226         unsigned long                   ageing_time;
 227         unsigned long                   bridge_hello_time;
 228         unsigned long                   bridge_forward_delay;
 229
 230         u8                              group_addr[ETH_ALEN];
 231         u16                             root_port;
 232
 233         enum {
 234                 BR_NO_STP,              /* no spanning tree */
 235                 BR_KERNEL_STP,          /* old STP in kernel */
 236                 BR_USER_STP,            /* new RSTP in userspace */
 237         } stp_enabled;
 238
 239         unsigned char                   topology_change;
 240         unsigned char                   topology_change_detected;
 241
 242 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 243         unsigned char                   multicast_router;
 244
 245         u8                              multicast_disabled:1;
 246         u8                              multicast_querier:1;
 247
 248         u32                             hash_elasticity;
 249         u32                             hash_max;
 250
 251         u32                             multicast_last_member_count;
 252         u32                             multicast_startup_queries_sent;
 253         u32                             multicast_startup_query_count;
 254
 255         unsigned long                   multicast_last_member_interval;
 256         unsigned long                   multicast_membership_interval;
 257         unsigned long                   multicast_querier_interval;
 258         unsigned long                   multicast_query_interval;
 259         unsigned long                   multicast_query_response_interval;
 260         unsigned long                   multicast_startup_query_interval;
 261
 262         spinlock_t                      multicast_lock;
 263         struct net_bridge_mdb_htable __rcu *mdb;
 264         struct hlist_head               router_list;
 265
 266         struct timer_list               multicast_router_timer;
 267         struct timer_list               multicast_querier_timer;
 268         struct timer_list               multicast_query_timer;
 269 #endif
 270
 271         struct timer_list               hello_timer;
 272         struct timer_list               tcn_timer;
 273         struct timer_list               topology_change_timer;
 274         struct timer_list               gc_timer;
 275         struct kobject                  *ifobj;
 276 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 277         u8                              vlan_enabled;
 278         struct net_port_vlans __rcu     *vlan_info;
 279 #endif
 280 };
 281
 282 struct br_input_skb_cb {
 283         struct net_device *brdev;
 284 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 285         int igmp;
 286         int mrouters_only;
 287 #endif
 288 };
 289
 290 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 291
 292 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 293 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 294 #else
 295 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 296 #endif
 297
 298 #define br_printk(level, br, format, args...)   \
 299         printk(level "%s: " format, (br)->dev->name, ##args)
 300
 301 #define br_err(__br, format, args...)                   \
 302         br_printk(KERN_ERR, __br, format, ##args)
 303 #define br_warn(__br, format, args...)                  \
 304         br_printk(KERN_WARNING, __br, format, ##args)
 305 #define br_notice(__br, format, args...)                \
 306         br_printk(KERN_NOTICE, __br, format, ##args)
 307 #define br_info(__br, format, args...)                  \
 308         br_printk(KERN_INFO, __br, format, ##args)
 309
 310 #define br_debug(br, format, args...)                   \
 311         pr_debug("%s: " format,  (br)->dev->name, ##args)
 312
 313 extern struct notifier_block br_device_notifier;
 314
 315 /* called under bridge lock */
 316 static inline int br_is_root_bridge(const struct net_bridge *br)
 317 {
 318         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 319 }
 320
 321 /* br_device.c */
 322 extern void br_dev_setup(struct net_device *dev);
 323 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
 324 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
 325                                struct net_device *dev);
 326 #ifdef CONFIG_NET_POLL_CONTROLLER
 327 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 328 {
 329         return br->dev->npinfo;
 330 }
 331
 332 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 333                                        struct sk_buff *skb)
 334 {
 335         struct netpoll *np = p->np;
 336
 337         if (np)
 338                 netpoll_send_skb(np, skb);
 339 }
 340
 341 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
 342 extern void br_netpoll_disable(struct net_bridge_port *p);
 343 #else
 344 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 345 {
 346         return NULL;
 347 }
 348
 349 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 350                                        struct sk_buff *skb)
 351 {
 352 }
 353
 354 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
 355 {
 356         return 0;
 357 }
 358
 359 static inline void br_netpoll_disable(struct net_bridge_port *p)
 360 {
 361 }
 362 #endif
 363
 364 /* br_fdb.c */
 365 extern int br_fdb_init(void);
 366 extern void br_fdb_fini(void);
 367 extern void br_fdb_flush(struct net_bridge *br);
 368 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 369                               const unsigned char *newaddr);
 370 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 371 extern void br_fdb_cleanup(unsigned long arg);
 372 extern void br_fdb_delete_by_port(struct net_bridge *br,
 373                                   const struct net_bridge_port *p, int do_all);
 374 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 375                                                  const unsigned char *addr);
 376 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 377 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 378                           unsigned long count, unsigned long off);
 379 extern int br_fdb_insert(struct net_bridge *br,
 380                          struct net_bridge_port *source,
 381                          const unsigned char *addr);
 382 extern void br_fdb_update(struct net_bridge *br,
 383                           struct net_bridge_port *source,
 384                           const unsigned char *addr);
 385
 386 extern int br_fdb_delete(struct ndmsg *ndm,
 387                          struct net_device *dev,
 388                          const unsigned char *addr);
 389 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
 390                       struct net_device *dev,
 391                       const unsigned char *addr,
 392                       u16 nlh_flags);
 393 extern int br_fdb_dump(struct sk_buff *skb,
 394                        struct netlink_callback *cb,
 395                        struct net_device *dev,
 396                        int idx);
 397
 398 /* br_forward.c */
 399 extern void br_deliver(const struct net_bridge_port *to,
 400                 struct sk_buff *skb);
 401 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 402 extern void br_forward(const struct net_bridge_port *to,
 403                 struct sk_buff *skb, struct sk_buff *skb0);
 404 extern int br_forward_finish(struct sk_buff *skb);
 405 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
 406 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 407                              struct sk_buff *skb2);
 408
 409 /* br_if.c */
 410 extern void br_port_carrier_check(struct net_bridge_port *p);
 411 extern int br_add_bridge(struct net *net, const char *name);
 412 extern int br_del_bridge(struct net *net, const char *name);
 413 extern void br_net_exit(struct net *net);
 414 extern int br_add_if(struct net_bridge *br,
 415               struct net_device *dev);
 416 extern int br_del_if(struct net_bridge *br,
 417               struct net_device *dev);
 418 extern int br_min_mtu(const struct net_bridge *br);
 419 extern netdev_features_t br_features_recompute(struct net_bridge *br,
 420         netdev_features_t features);
 421
 422 /* br_input.c */
 423 extern int br_handle_frame_finish(struct sk_buff *skb);
 424 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 425
 426 /* br_ioctl.c */
 427 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 428 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 429
 430 /* br_multicast.c */
 431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 432 extern unsigned int br_mdb_rehash_seq;
 433 extern int br_multicast_rcv(struct net_bridge *br,
 434                             struct net_bridge_port *port,
 435                             struct sk_buff *skb);
 436 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 437                                                struct sk_buff *skb);
 438 extern void br_multicast_add_port(struct net_bridge_port *port);
 439 extern void br_multicast_del_port(struct net_bridge_port *port);
 440 extern void br_multicast_enable_port(struct net_bridge_port *port);
 441 extern void br_multicast_disable_port(struct net_bridge_port *port);
 442 extern void br_multicast_init(struct net_bridge *br);
 443 extern void br_multicast_open(struct net_bridge *br);
 444 extern void br_multicast_stop(struct net_bridge *br);
 445 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 446                                  struct sk_buff *skb);
 447 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 448                                  struct sk_buff *skb, struct sk_buff *skb2);
 449 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 450 extern int br_multicast_set_port_router(struct net_bridge_port *p,
 451                                         unsigned long val);
 452 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 453 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 454 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 455 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
 456                                 struct net_bridge_mdb_htable *mdb,
 457                                 struct br_ip *dst);
 458 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
 459                                 struct net_bridge_port *port, struct br_ip *group);
 460 extern void br_multicast_free_pg(struct rcu_head *head);
 461 extern struct net_bridge_port_group *br_multicast_new_port_group(
 462                                 struct net_bridge_port *port,
 463                                 struct br_ip *group,
 464                                 struct net_bridge_port_group *next,
 465                                 unsigned char state);
 466 extern void br_mdb_init(void);
 467 extern void br_mdb_uninit(void);
 468 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 469                           struct br_ip *group, int type);
 470
 471 #define mlock_dereference(X, br) \
 472         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 473
 474 #if IS_ENABLED(CONFIG_IPV6)
 475 #include <net/addrconf.h>
 476 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
 477 {
 478         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
 479                 return 1;
 480         return 0;
 481 }
 482 #endif
 483
 484 static inline bool br_multicast_is_router(struct net_bridge *br)
 485 {
 486         return br->multicast_router == 2 ||
 487                (br->multicast_router == 1 &&
 488                 timer_pending(&br->multicast_router_timer));
 489 }
 490 #else
 491 static inline int br_multicast_rcv(struct net_bridge *br,
 492                                    struct net_bridge_port *port,
 493                                    struct sk_buff *skb)
 494 {
 495         return 0;
 496 }
 497
 498 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 499                                                       struct sk_buff *skb)
 500 {
 501         return NULL;
 502 }
 503
 504 static inline void br_multicast_add_port(struct net_bridge_port *port)
 505 {
 506 }
 507
 508 static inline void br_multicast_del_port(struct net_bridge_port *port)
 509 {
 510 }
 511
 512 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 513 {
 514 }
 515
 516 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 517 {
 518 }
 519
 520 static inline void br_multicast_init(struct net_bridge *br)
 521 {
 522 }
 523
 524 static inline void br_multicast_open(struct net_bridge *br)
 525 {
 526 }
 527
 528 static inline void br_multicast_stop(struct net_bridge *br)
 529 {
 530 }
 531
 532 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 533                                         struct sk_buff *skb)
 534 {
 535 }
 536
 537 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 538                                         struct sk_buff *skb,
 539                                         struct sk_buff *skb2)
 540 {
 541 }
 542 static inline bool br_multicast_is_router(struct net_bridge *br)
 543 {
 544         return 0;
 545 }
 546 static inline void br_mdb_init(void)
 547 {
 548 }
 549 static inline void br_mdb_uninit(void)
 550 {
 551 }
 552 #endif
 553
 554 /* br_vlan.c */
 555 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 556 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 557                                struct sk_buff *skb);
 558 extern bool br_allowed_egress(struct net_bridge *br,
 559                               const struct net_port_vlans *v,
 560                               const struct sk_buff *skb);
 561 extern int br_vlan_add(struct net_bridge *br, u16 vid);
 562 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
 563 extern void br_vlan_flush(struct net_bridge *br);
 564 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 565 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid);
 566 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 567 extern void nbp_vlan_flush(struct net_bridge_port *port);
 568
 569 static inline struct net_port_vlans *br_get_vlan_info(
 570                                                 const struct net_bridge *br)
 571 {
 572         return rcu_dereference(br->vlan_info);
 573 }
 574
 575 static inline struct net_port_vlans *nbp_get_vlan_info(
 576                                                 const struct net_bridge_port *p)
 577 {
 578         return rcu_dereference(p->vlan_info);
 579 }
 580
 581 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 582  * skb, the vlan tag will always be present if the frame was tagged.
 583  */
 584 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 585 {
 586         int err = 0;
 587
 588         if (vlan_tx_tag_present(skb))
 589                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 590         else {
 591                 *vid = 0;
 592                 err = -EINVAL;
 593         }
 594
 595         return err;
 596 }
 597 #else
 598 static inline bool br_allowed_ingress(struct net_bridge *br,
 599                                       struct net_port_vlans *v,
 600                                       struct sk_buff *skb)
 601 {
 602         return true;
 603 }
 604
 605 static inline bool br_allowed_egress(struct net_bridge *br,
 606                                      const struct net_port_vlans *v,
 607                                      const struct sk_buff *skb)
 608 {
 609         return true;
 610 }
 611
 612 static inline int br_vlan_add(struct net_bridge *br, u16 vid)
 613 {
 614         return -EOPNOTSUPP;
 615 }
 616
 617 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 618 {
 619         return -EOPNOTSUPP;
 620 }
 621
 622 static inline void br_vlan_flush(struct net_bridge *br)
 623 {
 624 }
 625
 626 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid)
 627 {
 628         return -EOPNOTSUPP;
 629 }
 630
 631 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 632 {
 633         return -EOPNOTSUPP;
 634 }
 635
 636 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 637 {
 638 }
 639
 640 static inline struct net_port_vlans *br_get_vlan_info(
 641                                                 const struct net_bridge *br)
 642 {
 643         return NULL;
 644 }
 645 static inline struct net_port_vlans *nbp_get_vlan_info(
 646                                                 const struct net_bridge_port *p)
 647 {
 648         return NULL;
 649 }
 650
 651 static inline u16 br_vlan_get_tag(const struct sk_buff *skb)
 652 {
 653         return 0;
 654 }
 655 #endif
 656
 657 /* br_netfilter.c */
 658 #ifdef CONFIG_BRIDGE_NETFILTER
 659 extern int br_netfilter_init(void);
 660 extern void br_netfilter_fini(void);
 661 extern void br_netfilter_rtable_init(struct net_bridge *);
 662 #else
 663 #define br_netfilter_init()     (0)
 664 #define br_netfilter_fini()     do { } while(0)
 665 #define br_netfilter_rtable_init(x)
 666 #endif
 667
 668 /* br_stp.c */
 669 extern void br_log_state(const struct net_bridge_port *p);
 670 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 671                                            u16 port_no);
 672 extern void br_init_port(struct net_bridge_port *p);
 673 extern void br_become_designated_port(struct net_bridge_port *p);
 674
 675 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 676 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 677 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
 678
 679
 680 /* br_stp_if.c */
 681 extern void br_stp_enable_bridge(struct net_bridge *br);
 682 extern void br_stp_disable_bridge(struct net_bridge *br);
 683 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 684 extern void br_stp_enable_port(struct net_bridge_port *p);
 685 extern void br_stp_disable_port(struct net_bridge_port *p);
 686 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 687 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 688 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 689                                        u16 newprio);
 690 extern int br_stp_set_port_priority(struct net_bridge_port *p,
 691                                     unsigned long newprio);
 692 extern int br_stp_set_path_cost(struct net_bridge_port *p,
 693                                 unsigned long path_cost);
 694 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 695
 696 /* br_stp_bpdu.c */
 697 struct stp_proto;
 698 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 699                        struct net_device *dev);
 700
 701 /* br_stp_timer.c */
 702 extern void br_stp_timer_init(struct net_bridge *br);
 703 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 704 extern unsigned long br_timer_value(const struct timer_list *timer);
 705
 706 /* br.c */
 707 #if IS_ENABLED(CONFIG_ATM_LANE)
 708 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 709 #endif
 710
 711 /* br_netlink.c */
 712 extern struct rtnl_link_ops br_link_ops;
 713 extern int br_netlink_init(void);
 714 extern void br_netlink_fini(void);
 715 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 716 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 717 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 718 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 719                       struct net_device *dev, u32 filter_mask);
 720
 721 #ifdef CONFIG_SYSFS
 722 /* br_sysfs_if.c */
 723 extern const struct sysfs_ops brport_sysfs_ops;
 724 extern int br_sysfs_addif(struct net_bridge_port *p);
 725 extern int br_sysfs_renameif(struct net_bridge_port *p);
 726
 727 /* br_sysfs_br.c */
 728 extern int br_sysfs_addbr(struct net_device *dev);
 729 extern void br_sysfs_delbr(struct net_device *dev);
 730
 731 #else
 732
 733 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 734 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 735 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 736 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 737 #endif /* CONFIG_SYSFS */
 738
 739 #endif