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