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         __u16           vid;
  67 };
  68
  69 struct net_port_vlans {
  70         u16                             port_idx;
  71         u16                             pvid;
  72         union {
  73                 struct net_bridge_port          *port;
  74                 struct net_bridge               *br;
  75         }                               parent;
  76         struct rcu_head                 rcu;
  77         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
  78         unsigned long                   untagged_bitmap[BR_VLAN_BITMAP_LEN];
  79         u16                             num_vlans;
  80 };
  81
  82 struct net_bridge_fdb_entry
  83 {
  84         struct hlist_node               hlist;
  85         struct net_bridge_port          *dst;
  86
  87         struct rcu_head                 rcu;
  88         unsigned long                   updated;
  89         unsigned long                   used;
  90         mac_addr                        addr;
  91         unsigned char                   is_local;
  92         unsigned char                   is_static;
  93         __u16                           vlan_id;
  94 };
  95
  96 struct net_bridge_port_group {
  97         struct net_bridge_port          *port;
  98         struct net_bridge_port_group __rcu *next;
  99         struct hlist_node               mglist;
 100         struct rcu_head                 rcu;
 101         struct timer_list               timer;
 102         struct br_ip                    addr;
 103         unsigned char                   state;
 104 };
 105
 106 struct net_bridge_mdb_entry
 107 {
 108         struct hlist_node               hlist[2];
 109         struct net_bridge               *br;
 110         struct net_bridge_port_group __rcu *ports;
 111         struct rcu_head                 rcu;
 112         struct timer_list               timer;
 113         struct br_ip                    addr;
 114         bool                            mglist;
 115 };
 116
 117 struct net_bridge_mdb_htable
 118 {
 119         struct hlist_head               *mhash;
 120         struct rcu_head                 rcu;
 121         struct net_bridge_mdb_htable    *old;
 122         u32                             size;
 123         u32                             max;
 124         u32                             secret;
 125         u32                             ver;
 126 };
 127
 128 struct net_bridge_port
 129 {
 130         struct net_bridge               *br;
 131         struct net_device               *dev;
 132         struct list_head                list;
 133
 134         /* STP */
 135         u8                              priority;
 136         u8                              state;
 137         u16                             port_no;
 138         unsigned char                   topology_change_ack;
 139         unsigned char                   config_pending;
 140         port_id                         port_id;
 141         port_id                         designated_port;
 142         bridge_id                       designated_root;
 143         bridge_id                       designated_bridge;
 144         u32                             path_cost;
 145         u32                             designated_cost;
 146         unsigned long                   designated_age;
 147
 148         struct timer_list               forward_delay_timer;
 149         struct timer_list               hold_timer;
 150         struct timer_list               message_age_timer;
 151         struct kobject                  kobj;
 152         struct rcu_head                 rcu;
 153
 154         unsigned long                   flags;
 155 #define BR_HAIRPIN_MODE         0x00000001
 156 #define BR_BPDU_GUARD           0x00000002
 157 #define BR_ROOT_BLOCK           0x00000004
 158 #define BR_MULTICAST_FAST_LEAVE 0x00000008
 159 #define BR_ADMIN_COST           0x00000010
 160
 161 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 162         u32                             multicast_startup_queries_sent;
 163         unsigned char                   multicast_router;
 164         struct timer_list               multicast_router_timer;
 165         struct timer_list               multicast_query_timer;
 166         struct hlist_head               mglist;
 167         struct hlist_node               rlist;
 168 #endif
 169
 170 #ifdef CONFIG_SYSFS
 171         char                            sysfs_name[IFNAMSIZ];
 172 #endif
 173
 174 #ifdef CONFIG_NET_POLL_CONTROLLER
 175         struct netpoll                  *np;
 176 #endif
 177 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 178         struct net_port_vlans __rcu     *vlan_info;
 179 #endif
 180 };
 181
 182 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 183
 184 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 185 {
 186         struct net_bridge_port *port =
 187                         rcu_dereference_rtnl(dev->rx_handler_data);
 188
 189         return br_port_exists(dev) ? port : NULL;
 190 }
 191
 192 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
 193 {
 194         return br_port_exists(dev) ?
 195                 rtnl_dereference(dev->rx_handler_data) : NULL;
 196 }
 197
 198 struct br_cpu_netstats {
 199         u64                     rx_packets;
 200         u64                     rx_bytes;
 201         u64                     tx_packets;
 202         u64                     tx_bytes;
 203         struct u64_stats_sync   syncp;
 204 };
 205
 206 struct net_bridge
 207 {
 208         spinlock_t                      lock;
 209         struct list_head                port_list;
 210         struct net_device               *dev;
 211
 212         struct br_cpu_netstats __percpu *stats;
 213         spinlock_t                      hash_lock;
 214         struct hlist_head               hash[BR_HASH_SIZE];
 215 #ifdef CONFIG_BRIDGE_NETFILTER
 216         struct rtable                   fake_rtable;
 217         bool                            nf_call_iptables;
 218         bool                            nf_call_ip6tables;
 219         bool                            nf_call_arptables;
 220 #endif
 221         u16                             group_fwd_mask;
 222
 223         /* STP */
 224         bridge_id                       designated_root;
 225         bridge_id                       bridge_id;
 226         u32                             root_path_cost;
 227         unsigned long                   max_age;
 228         unsigned long                   hello_time;
 229         unsigned long                   forward_delay;
 230         unsigned long                   bridge_max_age;
 231         unsigned long                   ageing_time;
 232         unsigned long                   bridge_hello_time;
 233         unsigned long                   bridge_forward_delay;
 234
 235         u8                              group_addr[ETH_ALEN];
 236         u16                             root_port;
 237
 238         enum {
 239                 BR_NO_STP,              /* no spanning tree */
 240                 BR_KERNEL_STP,          /* old STP in kernel */
 241                 BR_USER_STP,            /* new RSTP in userspace */
 242         } stp_enabled;
 243
 244         unsigned char                   topology_change;
 245         unsigned char                   topology_change_detected;
 246
 247 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 248         unsigned char                   multicast_router;
 249
 250         u8                              multicast_disabled:1;
 251         u8                              multicast_querier:1;
 252         u8                              multicast_query_use_ifaddr:1;
 253
 254         u32                             hash_elasticity;
 255         u32                             hash_max;
 256
 257         u32                             multicast_last_member_count;
 258         u32                             multicast_startup_queries_sent;
 259         u32                             multicast_startup_query_count;
 260
 261         unsigned long                   multicast_last_member_interval;
 262         unsigned long                   multicast_membership_interval;
 263         unsigned long                   multicast_querier_interval;
 264         unsigned long                   multicast_query_interval;
 265         unsigned long                   multicast_query_response_interval;
 266         unsigned long                   multicast_startup_query_interval;
 267
 268         spinlock_t                      multicast_lock;
 269         struct net_bridge_mdb_htable __rcu *mdb;
 270         struct hlist_head               router_list;
 271
 272         struct timer_list               multicast_router_timer;
 273         struct timer_list               multicast_querier_timer;
 274         struct timer_list               multicast_query_timer;
 275 #endif
 276
 277         struct timer_list               hello_timer;
 278         struct timer_list               tcn_timer;
 279         struct timer_list               topology_change_timer;
 280         struct timer_list               gc_timer;
 281         struct kobject                  *ifobj;
 282 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 283         u8                              vlan_enabled;
 284         struct net_port_vlans __rcu     *vlan_info;
 285 #endif
 286 };
 287
 288 struct br_input_skb_cb {
 289         struct net_device *brdev;
 290 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 291         int igmp;
 292         int mrouters_only;
 293 #endif
 294 };
 295
 296 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 297
 298 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 299 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 300 #else
 301 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 302 #endif
 303
 304 #define br_printk(level, br, format, args...)   \
 305         printk(level "%s: " format, (br)->dev->name, ##args)
 306
 307 #define br_err(__br, format, args...)                   \
 308         br_printk(KERN_ERR, __br, format, ##args)
 309 #define br_warn(__br, format, args...)                  \
 310         br_printk(KERN_WARNING, __br, format, ##args)
 311 #define br_notice(__br, format, args...)                \
 312         br_printk(KERN_NOTICE, __br, format, ##args)
 313 #define br_info(__br, format, args...)                  \
 314         br_printk(KERN_INFO, __br, format, ##args)
 315
 316 #define br_debug(br, format, args...)                   \
 317         pr_debug("%s: " format,  (br)->dev->name, ##args)
 318
 319 extern struct notifier_block br_device_notifier;
 320
 321 /* called under bridge lock */
 322 static inline int br_is_root_bridge(const struct net_bridge *br)
 323 {
 324         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 325 }
 326
 327 /* br_device.c */
 328 extern void br_dev_setup(struct net_device *dev);
 329 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
 330 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
 331                                struct net_device *dev);
 332 #ifdef CONFIG_NET_POLL_CONTROLLER
 333 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 334 {
 335         return br->dev->npinfo;
 336 }
 337
 338 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 339                                        struct sk_buff *skb)
 340 {
 341         struct netpoll *np = p->np;
 342
 343         if (np)
 344                 netpoll_send_skb(np, skb);
 345 }
 346
 347 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
 348 extern void br_netpoll_disable(struct net_bridge_port *p);
 349 #else
 350 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 351 {
 352         return NULL;
 353 }
 354
 355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 356                                        struct sk_buff *skb)
 357 {
 358 }
 359
 360 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
 361 {
 362         return 0;
 363 }
 364
 365 static inline void br_netpoll_disable(struct net_bridge_port *p)
 366 {
 367 }
 368 #endif
 369
 370 /* br_fdb.c */
 371 extern int br_fdb_init(void);
 372 extern void br_fdb_fini(void);
 373 extern void br_fdb_flush(struct net_bridge *br);
 374 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 375                               const unsigned char *newaddr);
 376 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 377 extern void br_fdb_cleanup(unsigned long arg);
 378 extern void br_fdb_delete_by_port(struct net_bridge *br,
 379                                   const struct net_bridge_port *p, int do_all);
 380 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 381                                                  const unsigned char *addr,
 382                                                  __u16 vid);
 383 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 384 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 385                           unsigned long count, unsigned long off);
 386 extern int br_fdb_insert(struct net_bridge *br,
 387                          struct net_bridge_port *source,
 388                          const unsigned char *addr,
 389                          u16 vid);
 390 extern void br_fdb_update(struct net_bridge *br,
 391                           struct net_bridge_port *source,
 392                           const unsigned char *addr,
 393                           u16 vid);
 394 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
 395
 396 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 397                          struct net_device *dev,
 398                          const unsigned char *addr);
 399 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
 400                       struct net_device *dev,
 401                       const unsigned char *addr,
 402                       u16 nlh_flags);
 403 extern int br_fdb_dump(struct sk_buff *skb,
 404                        struct netlink_callback *cb,
 405                        struct net_device *dev,
 406                        int idx);
 407
 408 /* br_forward.c */
 409 extern void br_deliver(const struct net_bridge_port *to,
 410                 struct sk_buff *skb);
 411 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 412 extern void br_forward(const struct net_bridge_port *to,
 413                 struct sk_buff *skb, struct sk_buff *skb0);
 414 extern int br_forward_finish(struct sk_buff *skb);
 415 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
 416 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 417                              struct sk_buff *skb2);
 418
 419 /* br_if.c */
 420 extern void br_port_carrier_check(struct net_bridge_port *p);
 421 extern int br_add_bridge(struct net *net, const char *name);
 422 extern int br_del_bridge(struct net *net, const char *name);
 423 extern void br_net_exit(struct net *net);
 424 extern int br_add_if(struct net_bridge *br,
 425               struct net_device *dev);
 426 extern int br_del_if(struct net_bridge *br,
 427               struct net_device *dev);
 428 extern int br_min_mtu(const struct net_bridge *br);
 429 extern netdev_features_t br_features_recompute(struct net_bridge *br,
 430         netdev_features_t features);
 431
 432 /* br_input.c */
 433 extern int br_handle_frame_finish(struct sk_buff *skb);
 434 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 435
 436 /* br_ioctl.c */
 437 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 438 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 439
 440 /* br_multicast.c */
 441 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 442 extern unsigned int br_mdb_rehash_seq;
 443 extern int br_multicast_rcv(struct net_bridge *br,
 444                             struct net_bridge_port *port,
 445                             struct sk_buff *skb);
 446 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 447                                                struct sk_buff *skb, u16 vid);
 448 extern void br_multicast_add_port(struct net_bridge_port *port);
 449 extern void br_multicast_del_port(struct net_bridge_port *port);
 450 extern void br_multicast_enable_port(struct net_bridge_port *port);
 451 extern void br_multicast_disable_port(struct net_bridge_port *port);
 452 extern void br_multicast_init(struct net_bridge *br);
 453 extern void br_multicast_open(struct net_bridge *br);
 454 extern void br_multicast_stop(struct net_bridge *br);
 455 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 456                                  struct sk_buff *skb);
 457 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 458                                  struct sk_buff *skb, struct sk_buff *skb2);
 459 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 460 extern int br_multicast_set_port_router(struct net_bridge_port *p,
 461                                         unsigned long val);
 462 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 463 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 464 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 465 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
 466                                 struct net_bridge_mdb_htable *mdb,
 467                                 struct br_ip *dst);
 468 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
 469                                 struct net_bridge_port *port, struct br_ip *group);
 470 extern void br_multicast_free_pg(struct rcu_head *head);
 471 extern struct net_bridge_port_group *br_multicast_new_port_group(
 472                                 struct net_bridge_port *port,
 473                                 struct br_ip *group,
 474                                 struct net_bridge_port_group *next,
 475                                 unsigned char state);
 476 extern void br_mdb_init(void);
 477 extern void br_mdb_uninit(void);
 478 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 479                           struct br_ip *group, int type);
 480
 481 #define mlock_dereference(X, br) \
 482         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 483
 484 #if IS_ENABLED(CONFIG_IPV6)
 485 #include <net/addrconf.h>
 486 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
 487 {
 488         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
 489                 return 1;
 490         return 0;
 491 }
 492 #endif
 493
 494 static inline bool br_multicast_is_router(struct net_bridge *br)
 495 {
 496         return br->multicast_router == 2 ||
 497                (br->multicast_router == 1 &&
 498                 timer_pending(&br->multicast_router_timer));
 499 }
 500 #else
 501 static inline int br_multicast_rcv(struct net_bridge *br,
 502                                    struct net_bridge_port *port,
 503                                    struct sk_buff *skb)
 504 {
 505         return 0;
 506 }
 507
 508 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 509                                                       struct sk_buff *skb, u16 vid)
 510 {
 511         return NULL;
 512 }
 513
 514 static inline void br_multicast_add_port(struct net_bridge_port *port)
 515 {
 516 }
 517
 518 static inline void br_multicast_del_port(struct net_bridge_port *port)
 519 {
 520 }
 521
 522 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 523 {
 524 }
 525
 526 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 527 {
 528 }
 529
 530 static inline void br_multicast_init(struct net_bridge *br)
 531 {
 532 }
 533
 534 static inline void br_multicast_open(struct net_bridge *br)
 535 {
 536 }
 537
 538 static inline void br_multicast_stop(struct net_bridge *br)
 539 {
 540 }
 541
 542 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 543                                         struct sk_buff *skb)
 544 {
 545 }
 546
 547 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 548                                         struct sk_buff *skb,
 549                                         struct sk_buff *skb2)
 550 {
 551 }
 552 static inline bool br_multicast_is_router(struct net_bridge *br)
 553 {
 554         return 0;
 555 }
 556 static inline void br_mdb_init(void)
 557 {
 558 }
 559 static inline void br_mdb_uninit(void)
 560 {
 561 }
 562 #endif
 563
 564 /* br_vlan.c */
 565 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 566 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 567                                struct sk_buff *skb, u16 *vid);
 568 extern bool br_allowed_egress(struct net_bridge *br,
 569                               const struct net_port_vlans *v,
 570                               const struct sk_buff *skb);
 571 extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
 572                                       const struct net_port_vlans *v,
 573                                       struct sk_buff *skb);
 574 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 575 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
 576 extern void br_vlan_flush(struct net_bridge *br);
 577 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 578 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 579 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 580 extern void nbp_vlan_flush(struct net_bridge_port *port);
 581 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
 582
 583 static inline struct net_port_vlans *br_get_vlan_info(
 584                                                 const struct net_bridge *br)
 585 {
 586         return rcu_dereference_rtnl(br->vlan_info);
 587 }
 588
 589 static inline struct net_port_vlans *nbp_get_vlan_info(
 590                                                 const struct net_bridge_port *p)
 591 {
 592         return rcu_dereference_rtnl(p->vlan_info);
 593 }
 594
 595 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 596  * skb, the vlan tag will always be present if the frame was tagged.
 597  */
 598 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 599 {
 600         int err = 0;
 601
 602         if (vlan_tx_tag_present(skb))
 603                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 604         else {
 605                 *vid = 0;
 606                 err = -EINVAL;
 607         }
 608
 609         return err;
 610 }
 611
 612 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 613 {
 614         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 615          * vid wasn't set
 616          */
 617         smp_rmb();
 618         return (v->pvid & VLAN_TAG_PRESENT) ?
 619                         (v->pvid & ~VLAN_TAG_PRESENT) :
 620                         VLAN_N_VID;
 621 }
 622
 623 #else
 624 static inline bool br_allowed_ingress(struct net_bridge *br,
 625                                       struct net_port_vlans *v,
 626                                       struct sk_buff *skb,
 627                                       u16 *vid)
 628 {
 629         return true;
 630 }
 631
 632 static inline bool br_allowed_egress(struct net_bridge *br,
 633                                      const struct net_port_vlans *v,
 634                                      const struct sk_buff *skb)
 635 {
 636         return true;
 637 }
 638
 639 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 640                                              const struct net_port_vlans *v,
 641                                              struct sk_buff *skb)
 642 {
 643         return skb;
 644 }
 645
 646 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 647 {
 648         return -EOPNOTSUPP;
 649 }
 650
 651 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 652 {
 653         return -EOPNOTSUPP;
 654 }
 655
 656 static inline void br_vlan_flush(struct net_bridge *br)
 657 {
 658 }
 659
 660 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 661 {
 662         return -EOPNOTSUPP;
 663 }
 664
 665 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 666 {
 667         return -EOPNOTSUPP;
 668 }
 669
 670 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 671 {
 672 }
 673
 674 static inline struct net_port_vlans *br_get_vlan_info(
 675                                                 const struct net_bridge *br)
 676 {
 677         return NULL;
 678 }
 679 static inline struct net_port_vlans *nbp_get_vlan_info(
 680                                                 const struct net_bridge_port *p)
 681 {
 682         return NULL;
 683 }
 684
 685 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
 686 {
 687         return false;
 688 }
 689
 690 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 691 {
 692         return 0;
 693 }
 694 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 695 {
 696         return VLAN_N_VID;      /* Returns invalid vid */
 697 }
 698 #endif
 699
 700 /* br_netfilter.c */
 701 #ifdef CONFIG_BRIDGE_NETFILTER
 702 extern int br_netfilter_init(void);
 703 extern void br_netfilter_fini(void);
 704 extern void br_netfilter_rtable_init(struct net_bridge *);
 705 #else
 706 #define br_netfilter_init()     (0)
 707 #define br_netfilter_fini()     do { } while(0)
 708 #define br_netfilter_rtable_init(x)
 709 #endif
 710
 711 /* br_stp.c */
 712 extern void br_log_state(const struct net_bridge_port *p);
 713 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 714                                            u16 port_no);
 715 extern void br_init_port(struct net_bridge_port *p);
 716 extern void br_become_designated_port(struct net_bridge_port *p);
 717
 718 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 719 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 720 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
 721
 722
 723 /* br_stp_if.c */
 724 extern void br_stp_enable_bridge(struct net_bridge *br);
 725 extern void br_stp_disable_bridge(struct net_bridge *br);
 726 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 727 extern void br_stp_enable_port(struct net_bridge_port *p);
 728 extern void br_stp_disable_port(struct net_bridge_port *p);
 729 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 730 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 731 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 732                                        u16 newprio);
 733 extern int br_stp_set_port_priority(struct net_bridge_port *p,
 734                                     unsigned long newprio);
 735 extern int br_stp_set_path_cost(struct net_bridge_port *p,
 736                                 unsigned long path_cost);
 737 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 738
 739 /* br_stp_bpdu.c */
 740 struct stp_proto;
 741 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 742                        struct net_device *dev);
 743
 744 /* br_stp_timer.c */
 745 extern void br_stp_timer_init(struct net_bridge *br);
 746 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 747 extern unsigned long br_timer_value(const struct timer_list *timer);
 748
 749 /* br.c */
 750 #if IS_ENABLED(CONFIG_ATM_LANE)
 751 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 752 #endif
 753
 754 /* br_netlink.c */
 755 extern struct rtnl_link_ops br_link_ops;
 756 extern int br_netlink_init(void);
 757 extern void br_netlink_fini(void);
 758 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 759 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 760 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 761 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 762                       struct net_device *dev, u32 filter_mask);
 763
 764 #ifdef CONFIG_SYSFS
 765 /* br_sysfs_if.c */
 766 extern const struct sysfs_ops brport_sysfs_ops;
 767 extern int br_sysfs_addif(struct net_bridge_port *p);
 768 extern int br_sysfs_renameif(struct net_bridge_port *p);
 769
 770 /* br_sysfs_br.c */
 771 extern int br_sysfs_addbr(struct net_device *dev);
 772 extern void br_sysfs_delbr(struct net_device *dev);
 773
 774 #else
 775
 776 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 777 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 778 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 779 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 780 #endif /* CONFIG_SYSFS */
 781
 782 #endif