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         bool                            timer_armed;
 116 };
 117
 118 struct net_bridge_mdb_htable
 119 {
 120         struct hlist_head               *mhash;
 121         struct rcu_head                 rcu;
 122         struct net_bridge_mdb_htable    *old;
 123         u32                             size;
 124         u32                             max;
 125         u32                             secret;
 126         u32                             ver;
 127 };
 128
 129 struct net_bridge_port
 130 {
 131         struct net_bridge               *br;
 132         struct net_device               *dev;
 133         struct list_head                list;
 134
 135         /* STP */
 136         u8                              priority;
 137         u8                              state;
 138         u16                             port_no;
 139         unsigned char                   topology_change_ack;
 140         unsigned char                   config_pending;
 141         port_id                         port_id;
 142         port_id                         designated_port;
 143         bridge_id                       designated_root;
 144         bridge_id                       designated_bridge;
 145         u32                             path_cost;
 146         u32                             designated_cost;
 147         unsigned long                   designated_age;
 148
 149         struct timer_list               forward_delay_timer;
 150         struct timer_list               hold_timer;
 151         struct timer_list               message_age_timer;
 152         struct kobject                  kobj;
 153         struct rcu_head                 rcu;
 154
 155         unsigned long                   flags;
 156 #define BR_HAIRPIN_MODE         0x00000001
 157 #define BR_BPDU_GUARD           0x00000002
 158 #define BR_ROOT_BLOCK           0x00000004
 159 #define BR_MULTICAST_FAST_LEAVE 0x00000008
 160 #define BR_ADMIN_COST           0x00000010
 161 #define BR_LEARNING             0x00000020
 162 #define BR_FLOOD                0x00000040
 163
 164 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 165         u32                             multicast_startup_queries_sent;
 166         unsigned char                   multicast_router;
 167         struct timer_list               multicast_router_timer;
 168         struct timer_list               multicast_query_timer;
 169         struct hlist_head               mglist;
 170         struct hlist_node               rlist;
 171 #endif
 172
 173 #ifdef CONFIG_SYSFS
 174         char                            sysfs_name[IFNAMSIZ];
 175 #endif
 176
 177 #ifdef CONFIG_NET_POLL_CONTROLLER
 178         struct netpoll                  *np;
 179 #endif
 180 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 181         struct net_port_vlans __rcu     *vlan_info;
 182 #endif
 183 };
 184
 185 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 186
 187 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 188 {
 189         struct net_bridge_port *port =
 190                         rcu_dereference_rtnl(dev->rx_handler_data);
 191
 192         return br_port_exists(dev) ? port : NULL;
 193 }
 194
 195 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
 196 {
 197         return br_port_exists(dev) ?
 198                 rtnl_dereference(dev->rx_handler_data) : NULL;
 199 }
 200
 201 struct br_cpu_netstats {
 202         u64                     rx_packets;
 203         u64                     rx_bytes;
 204         u64                     tx_packets;
 205         u64                     tx_bytes;
 206         struct u64_stats_sync   syncp;
 207 };
 208
 209 struct net_bridge
 210 {
 211         spinlock_t                      lock;
 212         struct list_head                port_list;
 213         struct net_device               *dev;
 214
 215         struct br_cpu_netstats __percpu *stats;
 216         spinlock_t                      hash_lock;
 217         struct hlist_head               hash[BR_HASH_SIZE];
 218 #ifdef CONFIG_BRIDGE_NETFILTER
 219         struct rtable                   fake_rtable;
 220         bool                            nf_call_iptables;
 221         bool                            nf_call_ip6tables;
 222         bool                            nf_call_arptables;
 223 #endif
 224         u16                             group_fwd_mask;
 225
 226         /* STP */
 227         bridge_id                       designated_root;
 228         bridge_id                       bridge_id;
 229         u32                             root_path_cost;
 230         unsigned long                   max_age;
 231         unsigned long                   hello_time;
 232         unsigned long                   forward_delay;
 233         unsigned long                   bridge_max_age;
 234         unsigned long                   ageing_time;
 235         unsigned long                   bridge_hello_time;
 236         unsigned long                   bridge_forward_delay;
 237
 238         u8                              group_addr[ETH_ALEN];
 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_queries_sent;
 262         u32                             multicast_startup_query_count;
 263
 264         unsigned long                   multicast_last_member_interval;
 265         unsigned long                   multicast_membership_interval;
 266         unsigned long                   multicast_querier_interval;
 267         unsigned long                   multicast_query_interval;
 268         unsigned long                   multicast_query_response_interval;
 269         unsigned long                   multicast_startup_query_interval;
 270
 271         spinlock_t                      multicast_lock;
 272         struct net_bridge_mdb_htable __rcu *mdb;
 273         struct hlist_head               router_list;
 274
 275         struct timer_list               multicast_router_timer;
 276         struct timer_list               multicast_querier_timer;
 277         struct timer_list               multicast_query_timer;
 278 #endif
 279
 280         struct timer_list               hello_timer;
 281         struct timer_list               tcn_timer;
 282         struct timer_list               topology_change_timer;
 283         struct timer_list               gc_timer;
 284         struct kobject                  *ifobj;
 285 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 286         u8                              vlan_enabled;
 287         struct net_port_vlans __rcu     *vlan_info;
 288 #endif
 289 };
 290
 291 struct br_input_skb_cb {
 292         struct net_device *brdev;
 293 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 294         int igmp;
 295         int mrouters_only;
 296 #endif
 297 };
 298
 299 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 300
 301 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 302 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 303 #else
 304 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 305 #endif
 306
 307 #define br_printk(level, br, format, args...)   \
 308         printk(level "%s: " format, (br)->dev->name, ##args)
 309
 310 #define br_err(__br, format, args...)                   \
 311         br_printk(KERN_ERR, __br, format, ##args)
 312 #define br_warn(__br, format, args...)                  \
 313         br_printk(KERN_WARNING, __br, format, ##args)
 314 #define br_notice(__br, format, args...)                \
 315         br_printk(KERN_NOTICE, __br, format, ##args)
 316 #define br_info(__br, format, args...)                  \
 317         br_printk(KERN_INFO, __br, format, ##args)
 318
 319 #define br_debug(br, format, args...)                   \
 320         pr_debug("%s: " format,  (br)->dev->name, ##args)
 321
 322 extern struct notifier_block br_device_notifier;
 323
 324 /* called under bridge lock */
 325 static inline int br_is_root_bridge(const struct net_bridge *br)
 326 {
 327         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 328 }
 329
 330 /* br_device.c */
 331 extern void br_dev_setup(struct net_device *dev);
 332 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
 333 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
 334                                struct net_device *dev);
 335 #ifdef CONFIG_NET_POLL_CONTROLLER
 336 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 337 {
 338         return br->dev->npinfo;
 339 }
 340
 341 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 342                                        struct sk_buff *skb)
 343 {
 344         struct netpoll *np = p->np;
 345
 346         if (np)
 347                 netpoll_send_skb(np, skb);
 348 }
 349
 350 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
 351 extern void br_netpoll_disable(struct net_bridge_port *p);
 352 #else
 353 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 354 {
 355         return NULL;
 356 }
 357
 358 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 359                                        struct sk_buff *skb)
 360 {
 361 }
 362
 363 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
 364 {
 365         return 0;
 366 }
 367
 368 static inline void br_netpoll_disable(struct net_bridge_port *p)
 369 {
 370 }
 371 #endif
 372
 373 /* br_fdb.c */
 374 extern int br_fdb_init(void);
 375 extern void br_fdb_fini(void);
 376 extern void br_fdb_flush(struct net_bridge *br);
 377 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 378                               const unsigned char *newaddr);
 379 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 380 extern void br_fdb_cleanup(unsigned long arg);
 381 extern void br_fdb_delete_by_port(struct net_bridge *br,
 382                                   const struct net_bridge_port *p, int do_all);
 383 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 384                                                  const unsigned char *addr,
 385                                                  __u16 vid);
 386 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 387 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 388                           unsigned long count, unsigned long off);
 389 extern int br_fdb_insert(struct net_bridge *br,
 390                          struct net_bridge_port *source,
 391                          const unsigned char *addr,
 392                          u16 vid);
 393 extern void br_fdb_update(struct net_bridge *br,
 394                           struct net_bridge_port *source,
 395                           const unsigned char *addr,
 396                           u16 vid);
 397 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
 398
 399 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 400                          struct net_device *dev,
 401                          const unsigned char *addr);
 402 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
 403                       struct net_device *dev,
 404                       const unsigned char *addr,
 405                       u16 nlh_flags);
 406 extern int br_fdb_dump(struct sk_buff *skb,
 407                        struct netlink_callback *cb,
 408                        struct net_device *dev,
 409                        int idx);
 410
 411 /* br_forward.c */
 412 extern void br_deliver(const struct net_bridge_port *to,
 413                 struct sk_buff *skb);
 414 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 415 extern void br_forward(const struct net_bridge_port *to,
 416                 struct sk_buff *skb, struct sk_buff *skb0);
 417 extern int br_forward_finish(struct sk_buff *skb);
 418 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb,
 419                              bool unicast);
 420 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 421                              struct sk_buff *skb2, bool unicast);
 422
 423 /* br_if.c */
 424 extern void br_port_carrier_check(struct net_bridge_port *p);
 425 extern int br_add_bridge(struct net *net, const char *name);
 426 extern int br_del_bridge(struct net *net, const char *name);
 427 extern void br_net_exit(struct net *net);
 428 extern int br_add_if(struct net_bridge *br,
 429               struct net_device *dev);
 430 extern int br_del_if(struct net_bridge *br,
 431               struct net_device *dev);
 432 extern int br_min_mtu(const struct net_bridge *br);
 433 extern netdev_features_t br_features_recompute(struct net_bridge *br,
 434         netdev_features_t features);
 435
 436 /* br_input.c */
 437 extern int br_handle_frame_finish(struct sk_buff *skb);
 438 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 439
 440 /* br_ioctl.c */
 441 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 442 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 443
 444 /* br_multicast.c */
 445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 446 extern unsigned int br_mdb_rehash_seq;
 447 extern int br_multicast_rcv(struct net_bridge *br,
 448                             struct net_bridge_port *port,
 449                             struct sk_buff *skb);
 450 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 451                                                struct sk_buff *skb, u16 vid);
 452 extern void br_multicast_add_port(struct net_bridge_port *port);
 453 extern void br_multicast_del_port(struct net_bridge_port *port);
 454 extern void br_multicast_enable_port(struct net_bridge_port *port);
 455 extern void br_multicast_disable_port(struct net_bridge_port *port);
 456 extern void br_multicast_init(struct net_bridge *br);
 457 extern void br_multicast_open(struct net_bridge *br);
 458 extern void br_multicast_stop(struct net_bridge *br);
 459 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 460                                  struct sk_buff *skb);
 461 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 462                                  struct sk_buff *skb, struct sk_buff *skb2);
 463 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 464 extern int br_multicast_set_port_router(struct net_bridge_port *p,
 465                                         unsigned long val);
 466 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 467 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 468 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 469 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
 470                                 struct net_bridge_mdb_htable *mdb,
 471                                 struct br_ip *dst);
 472 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
 473                                 struct net_bridge_port *port, struct br_ip *group);
 474 extern void br_multicast_free_pg(struct rcu_head *head);
 475 extern struct net_bridge_port_group *br_multicast_new_port_group(
 476                                 struct net_bridge_port *port,
 477                                 struct br_ip *group,
 478                                 struct net_bridge_port_group *next,
 479                                 unsigned char state);
 480 extern void br_mdb_init(void);
 481 extern void br_mdb_uninit(void);
 482 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 483                           struct br_ip *group, int type);
 484
 485 #define mlock_dereference(X, br) \
 486         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 487
 488 #if IS_ENABLED(CONFIG_IPV6)
 489 #include <net/addrconf.h>
 490 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
 491 {
 492         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
 493                 return 1;
 494         return 0;
 495 }
 496 #endif
 497
 498 static inline bool br_multicast_is_router(struct net_bridge *br)
 499 {
 500         return br->multicast_router == 2 ||
 501                (br->multicast_router == 1 &&
 502                 timer_pending(&br->multicast_router_timer));
 503 }
 504 #else
 505 static inline int br_multicast_rcv(struct net_bridge *br,
 506                                    struct net_bridge_port *port,
 507                                    struct sk_buff *skb)
 508 {
 509         return 0;
 510 }
 511
 512 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 513                                                       struct sk_buff *skb, u16 vid)
 514 {
 515         return NULL;
 516 }
 517
 518 static inline void br_multicast_add_port(struct net_bridge_port *port)
 519 {
 520 }
 521
 522 static inline void br_multicast_del_port(struct net_bridge_port *port)
 523 {
 524 }
 525
 526 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 527 {
 528 }
 529
 530 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 531 {
 532 }
 533
 534 static inline void br_multicast_init(struct net_bridge *br)
 535 {
 536 }
 537
 538 static inline void br_multicast_open(struct net_bridge *br)
 539 {
 540 }
 541
 542 static inline void br_multicast_stop(struct net_bridge *br)
 543 {
 544 }
 545
 546 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 547                                         struct sk_buff *skb)
 548 {
 549 }
 550
 551 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 552                                         struct sk_buff *skb,
 553                                         struct sk_buff *skb2)
 554 {
 555 }
 556 static inline bool br_multicast_is_router(struct net_bridge *br)
 557 {
 558         return 0;
 559 }
 560 static inline void br_mdb_init(void)
 561 {
 562 }
 563 static inline void br_mdb_uninit(void)
 564 {
 565 }
 566 #endif
 567
 568 /* br_vlan.c */
 569 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 570 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 571                                struct sk_buff *skb, u16 *vid);
 572 extern bool br_allowed_egress(struct net_bridge *br,
 573                               const struct net_port_vlans *v,
 574                               const struct sk_buff *skb);
 575 extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
 576                                       const struct net_port_vlans *v,
 577                                       struct sk_buff *skb);
 578 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 579 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
 580 extern void br_vlan_flush(struct net_bridge *br);
 581 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 582 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 583 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 584 extern void nbp_vlan_flush(struct net_bridge_port *port);
 585 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
 586
 587 static inline struct net_port_vlans *br_get_vlan_info(
 588                                                 const struct net_bridge *br)
 589 {
 590         return rcu_dereference_rtnl(br->vlan_info);
 591 }
 592
 593 static inline struct net_port_vlans *nbp_get_vlan_info(
 594                                                 const struct net_bridge_port *p)
 595 {
 596         return rcu_dereference_rtnl(p->vlan_info);
 597 }
 598
 599 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 600  * skb, the vlan tag will always be present if the frame was tagged.
 601  */
 602 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 603 {
 604         int err = 0;
 605
 606         if (vlan_tx_tag_present(skb))
 607                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 608         else {
 609                 *vid = 0;
 610                 err = -EINVAL;
 611         }
 612
 613         return err;
 614 }
 615
 616 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 617 {
 618         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 619          * vid wasn't set
 620          */
 621         smp_rmb();
 622         return (v->pvid & VLAN_TAG_PRESENT) ?
 623                         (v->pvid & ~VLAN_TAG_PRESENT) :
 624                         VLAN_N_VID;
 625 }
 626
 627 #else
 628 static inline bool br_allowed_ingress(struct net_bridge *br,
 629                                       struct net_port_vlans *v,
 630                                       struct sk_buff *skb,
 631                                       u16 *vid)
 632 {
 633         return true;
 634 }
 635
 636 static inline bool br_allowed_egress(struct net_bridge *br,
 637                                      const struct net_port_vlans *v,
 638                                      const struct sk_buff *skb)
 639 {
 640         return true;
 641 }
 642
 643 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 644                                              const struct net_port_vlans *v,
 645                                              struct sk_buff *skb)
 646 {
 647         return skb;
 648 }
 649
 650 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 651 {
 652         return -EOPNOTSUPP;
 653 }
 654
 655 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 656 {
 657         return -EOPNOTSUPP;
 658 }
 659
 660 static inline void br_vlan_flush(struct net_bridge *br)
 661 {
 662 }
 663
 664 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 665 {
 666         return -EOPNOTSUPP;
 667 }
 668
 669 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 670 {
 671         return -EOPNOTSUPP;
 672 }
 673
 674 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 675 {
 676 }
 677
 678 static inline struct net_port_vlans *br_get_vlan_info(
 679                                                 const struct net_bridge *br)
 680 {
 681         return NULL;
 682 }
 683 static inline struct net_port_vlans *nbp_get_vlan_info(
 684                                                 const struct net_bridge_port *p)
 685 {
 686         return NULL;
 687 }
 688
 689 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
 690 {
 691         return false;
 692 }
 693
 694 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 695 {
 696         return 0;
 697 }
 698 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 699 {
 700         return VLAN_N_VID;      /* Returns invalid vid */
 701 }
 702 #endif
 703
 704 /* br_netfilter.c */
 705 #ifdef CONFIG_BRIDGE_NETFILTER
 706 extern int br_netfilter_init(void);
 707 extern void br_netfilter_fini(void);
 708 extern void br_netfilter_rtable_init(struct net_bridge *);
 709 #else
 710 #define br_netfilter_init()     (0)
 711 #define br_netfilter_fini()     do { } while(0)
 712 #define br_netfilter_rtable_init(x)
 713 #endif
 714
 715 /* br_stp.c */
 716 extern void br_log_state(const struct net_bridge_port *p);
 717 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 718                                            u16 port_no);
 719 extern void br_init_port(struct net_bridge_port *p);
 720 extern void br_become_designated_port(struct net_bridge_port *p);
 721
 722 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 723 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 724 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
 725
 726
 727 /* br_stp_if.c */
 728 extern void br_stp_enable_bridge(struct net_bridge *br);
 729 extern void br_stp_disable_bridge(struct net_bridge *br);
 730 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 731 extern void br_stp_enable_port(struct net_bridge_port *p);
 732 extern void br_stp_disable_port(struct net_bridge_port *p);
 733 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 734 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 735 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 736                                        u16 newprio);
 737 extern int br_stp_set_port_priority(struct net_bridge_port *p,
 738                                     unsigned long newprio);
 739 extern int br_stp_set_path_cost(struct net_bridge_port *p,
 740                                 unsigned long path_cost);
 741 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 742
 743 /* br_stp_bpdu.c */
 744 struct stp_proto;
 745 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 746                        struct net_device *dev);
 747
 748 /* br_stp_timer.c */
 749 extern void br_stp_timer_init(struct net_bridge *br);
 750 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 751 extern unsigned long br_timer_value(const struct timer_list *timer);
 752
 753 /* br.c */
 754 #if IS_ENABLED(CONFIG_ATM_LANE)
 755 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 756 #endif
 757
 758 /* br_netlink.c */
 759 extern struct rtnl_link_ops br_link_ops;
 760 extern int br_netlink_init(void);
 761 extern void br_netlink_fini(void);
 762 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 763 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 764 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 765 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 766                       struct net_device *dev, u32 filter_mask);
 767
 768 #ifdef CONFIG_SYSFS
 769 /* br_sysfs_if.c */
 770 extern const struct sysfs_ops brport_sysfs_ops;
 771 extern int br_sysfs_addif(struct net_bridge_port *p);
 772 extern int br_sysfs_renameif(struct net_bridge_port *p);
 773
 774 /* br_sysfs_br.c */
 775 extern int br_sysfs_addbr(struct net_device *dev);
 776 extern void br_sysfs_delbr(struct net_device *dev);
 777
 778 #else
 779
 780 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 781 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 782 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 783 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 784 #endif /* CONFIG_SYSFS */
 785
 786 #endif