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

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef _BR_PRIVATE_H
  14 #define _BR_PRIVATE_H
  15
  16 #include <linux/netdevice.h>
  17 #include <linux/if_bridge.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/u64_stats_sync.h>
  20 #include <net/route.h>
  21 #include <linux/if_vlan.h>
  22
  23 #define BR_HASH_BITS 8
  24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  25
  26 #define BR_HOLD_TIME (1*HZ)
  27
  28 #define BR_PORT_BITS    10
  29 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  30 #define BR_VLAN_BITMAP_LEN      BITS_TO_LONGS(VLAN_N_VID)
  31
  32 #define BR_VERSION      "2.3"
  33
  34 /* Control of forwarding link local multicast */
  35 #define BR_GROUPFWD_DEFAULT     0
  36 /* Don't allow forwarding control protocols like STP and LLDP */
  37 #define BR_GROUPFWD_RESTRICTED  0x4007u
  38
  39 /* Path to usermode spanning tree program */
  40 #define BR_STP_PROG     "/sbin/bridge-stp"
  41
  42 typedef struct bridge_id bridge_id;
  43 typedef struct mac_addr mac_addr;
  44 typedef __u16 port_id;
  45
  46 struct bridge_id
  47 {
  48         unsigned char   prio[2];
  49         unsigned char   addr[6];
  50 };
  51
  52 struct mac_addr
  53 {
  54         unsigned char   addr[6];
  55 };
  56
  57 struct br_ip
  58 {
  59         union {
  60                 __be32  ip4;
  61 #if IS_ENABLED(CONFIG_IPV6)
  62                 struct in6_addr ip6;
  63 #endif
  64         } u;
  65         __be16          proto;
  66         __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
 162 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 163         u32                             multicast_startup_queries_sent;
 164         unsigned char                   multicast_router;
 165         struct timer_list               multicast_router_timer;
 166         struct timer_list               multicast_query_timer;
 167         struct hlist_head               mglist;
 168         struct hlist_node               rlist;
 169 #endif
 170
 171 #ifdef CONFIG_SYSFS
 172         char                            sysfs_name[IFNAMSIZ];
 173 #endif
 174
 175 #ifdef CONFIG_NET_POLL_CONTROLLER
 176         struct netpoll                  *np;
 177 #endif
 178 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 179         struct net_port_vlans __rcu     *vlan_info;
 180 #endif
 181 };
 182
 183 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 184
 185 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 186 {
 187         struct net_bridge_port *port =
 188                         rcu_dereference_rtnl(dev->rx_handler_data);
 189
 190         return br_port_exists(dev) ? port : NULL;
 191 }
 192
 193 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
 194 {
 195         return br_port_exists(dev) ?
 196                 rtnl_dereference(dev->rx_handler_data) : NULL;
 197 }
 198
 199 struct br_cpu_netstats {
 200         u64                     rx_packets;
 201         u64                     rx_bytes;
 202         u64                     tx_packets;
 203         u64                     tx_bytes;
 204         struct u64_stats_sync   syncp;
 205 };
 206
 207 struct net_bridge
 208 {
 209         spinlock_t                      lock;
 210         struct list_head                port_list;
 211         struct net_device               *dev;
 212
 213         struct br_cpu_netstats __percpu *stats;
 214         spinlock_t                      hash_lock;
 215         struct hlist_head               hash[BR_HASH_SIZE];
 216 #ifdef CONFIG_BRIDGE_NETFILTER
 217         struct rtable                   fake_rtable;
 218         bool                            nf_call_iptables;
 219         bool                            nf_call_ip6tables;
 220         bool                            nf_call_arptables;
 221 #endif
 222         u16                             group_fwd_mask;
 223
 224         /* STP */
 225         bridge_id                       designated_root;
 226         bridge_id                       bridge_id;
 227         u32                             root_path_cost;
 228         unsigned long                   max_age;
 229         unsigned long                   hello_time;
 230         unsigned long                   forward_delay;
 231         unsigned long                   bridge_max_age;
 232         unsigned long                   ageing_time;
 233         unsigned long                   bridge_hello_time;
 234         unsigned long                   bridge_forward_delay;
 235
 236         u8                              group_addr[ETH_ALEN];
 237         u16                             root_port;
 238
 239         enum {
 240                 BR_NO_STP,              /* no spanning tree */
 241                 BR_KERNEL_STP,          /* old STP in kernel */
 242                 BR_USER_STP,            /* new RSTP in userspace */
 243         } stp_enabled;
 244
 245         unsigned char                   topology_change;
 246         unsigned char                   topology_change_detected;
 247
 248 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 249         unsigned char                   multicast_router;
 250
 251         u8                              multicast_disabled:1;
 252         u8                              multicast_querier:1;
 253         u8                              multicast_query_use_ifaddr:1;
 254
 255         u32                             hash_elasticity;
 256         u32                             hash_max;
 257
 258         u32                             multicast_last_member_count;
 259         u32                             multicast_startup_queries_sent;
 260         u32                             multicast_startup_query_count;
 261
 262         unsigned long                   multicast_last_member_interval;
 263         unsigned long                   multicast_membership_interval;
 264         unsigned long                   multicast_querier_interval;
 265         unsigned long                   multicast_query_interval;
 266         unsigned long                   multicast_query_response_interval;
 267         unsigned long                   multicast_startup_query_interval;
 268
 269         spinlock_t                      multicast_lock;
 270         struct net_bridge_mdb_htable __rcu *mdb;
 271         struct hlist_head               router_list;
 272
 273         struct timer_list               multicast_router_timer;
 274         struct timer_list               multicast_querier_timer;
 275         struct timer_list               multicast_query_timer;
 276 #endif
 277
 278         struct timer_list               hello_timer;
 279         struct timer_list               tcn_timer;
 280         struct timer_list               topology_change_timer;
 281         struct timer_list               gc_timer;
 282         struct kobject                  *ifobj;
 283 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 284         u8                              vlan_enabled;
 285         struct net_port_vlans __rcu     *vlan_info;
 286 #endif
 287 };
 288
 289 struct br_input_skb_cb {
 290         struct net_device *brdev;
 291 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 292         int igmp;
 293         int mrouters_only;
 294 #endif
 295 };
 296
 297 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 298
 299 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 300 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 301 #else
 302 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 303 #endif
 304
 305 #define br_printk(level, br, format, args...)   \
 306         printk(level "%s: " format, (br)->dev->name, ##args)
 307
 308 #define br_err(__br, format, args...)                   \
 309         br_printk(KERN_ERR, __br, format, ##args)
 310 #define br_warn(__br, format, args...)                  \
 311         br_printk(KERN_WARNING, __br, format, ##args)
 312 #define br_notice(__br, format, args...)                \
 313         br_printk(KERN_NOTICE, __br, format, ##args)
 314 #define br_info(__br, format, args...)                  \
 315         br_printk(KERN_INFO, __br, format, ##args)
 316
 317 #define br_debug(br, format, args...)                   \
 318         pr_debug("%s: " format,  (br)->dev->name, ##args)
 319
 320 extern struct notifier_block br_device_notifier;
 321
 322 /* called under bridge lock */
 323 static inline int br_is_root_bridge(const struct net_bridge *br)
 324 {
 325         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 326 }
 327
 328 /* br_device.c */
 329 extern void br_dev_setup(struct net_device *dev);
 330 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
 331 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
 332                                struct net_device *dev);
 333 #ifdef CONFIG_NET_POLL_CONTROLLER
 334 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 335 {
 336         return br->dev->npinfo;
 337 }
 338
 339 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 340                                        struct sk_buff *skb)
 341 {
 342         struct netpoll *np = p->np;
 343
 344         if (np)
 345                 netpoll_send_skb(np, skb);
 346 }
 347
 348 extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
 349 extern void br_netpoll_disable(struct net_bridge_port *p);
 350 #else
 351 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
 352 {
 353         return NULL;
 354 }
 355
 356 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 357                                        struct sk_buff *skb)
 358 {
 359 }
 360
 361 static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
 362 {
 363         return 0;
 364 }
 365
 366 static inline void br_netpoll_disable(struct net_bridge_port *p)
 367 {
 368 }
 369 #endif
 370
 371 /* br_fdb.c */
 372 extern int br_fdb_init(void);
 373 extern void br_fdb_fini(void);
 374 extern void br_fdb_flush(struct net_bridge *br);
 375 extern void br_fdb_changeaddr(struct net_bridge_port *p,
 376                               const unsigned char *newaddr);
 377 extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 378 extern void br_fdb_cleanup(unsigned long arg);
 379 extern void br_fdb_delete_by_port(struct net_bridge *br,
 380                                   const struct net_bridge_port *p, int do_all);
 381 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 382                                                  const unsigned char *addr,
 383                                                  __u16 vid);
 384 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 385 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
 386                           unsigned long count, unsigned long off);
 387 extern int br_fdb_insert(struct net_bridge *br,
 388                          struct net_bridge_port *source,
 389                          const unsigned char *addr,
 390                          u16 vid);
 391 extern void br_fdb_update(struct net_bridge *br,
 392                           struct net_bridge_port *source,
 393                           const unsigned char *addr,
 394                           u16 vid);
 395 extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
 396
 397 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 398                          struct net_device *dev,
 399                          const unsigned char *addr);
 400 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
 401                       struct net_device *dev,
 402                       const unsigned char *addr,
 403                       u16 nlh_flags);
 404 extern int br_fdb_dump(struct sk_buff *skb,
 405                        struct netlink_callback *cb,
 406                        struct net_device *dev,
 407                        int idx);
 408
 409 /* br_forward.c */
 410 extern void br_deliver(const struct net_bridge_port *to,
 411                 struct sk_buff *skb);
 412 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 413 extern void br_forward(const struct net_bridge_port *to,
 414                 struct sk_buff *skb, struct sk_buff *skb0);
 415 extern int br_forward_finish(struct sk_buff *skb);
 416 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
 417 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 418                              struct sk_buff *skb2);
 419
 420 /* br_if.c */
 421 extern void br_port_carrier_check(struct net_bridge_port *p);
 422 extern int br_add_bridge(struct net *net, const char *name);
 423 extern int br_del_bridge(struct net *net, const char *name);
 424 extern void br_net_exit(struct net *net);
 425 extern int br_add_if(struct net_bridge *br,
 426               struct net_device *dev);
 427 extern int br_del_if(struct net_bridge *br,
 428               struct net_device *dev);
 429 extern int br_min_mtu(const struct net_bridge *br);
 430 extern netdev_features_t br_features_recompute(struct net_bridge *br,
 431         netdev_features_t features);
 432
 433 /* br_input.c */
 434 extern int br_handle_frame_finish(struct sk_buff *skb);
 435 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 436
 437 /* br_ioctl.c */
 438 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 439 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 440
 441 /* br_multicast.c */
 442 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 443 extern unsigned int br_mdb_rehash_seq;
 444 extern int br_multicast_rcv(struct net_bridge *br,
 445                             struct net_bridge_port *port,
 446                             struct sk_buff *skb);
 447 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 448                                                struct sk_buff *skb, u16 vid);
 449 extern void br_multicast_add_port(struct net_bridge_port *port);
 450 extern void br_multicast_del_port(struct net_bridge_port *port);
 451 extern void br_multicast_enable_port(struct net_bridge_port *port);
 452 extern void br_multicast_disable_port(struct net_bridge_port *port);
 453 extern void br_multicast_init(struct net_bridge *br);
 454 extern void br_multicast_open(struct net_bridge *br);
 455 extern void br_multicast_stop(struct net_bridge *br);
 456 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 457                                  struct sk_buff *skb);
 458 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 459                                  struct sk_buff *skb, struct sk_buff *skb2);
 460 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 461 extern int br_multicast_set_port_router(struct net_bridge_port *p,
 462                                         unsigned long val);
 463 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 464 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 465 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 466 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
 467                                 struct net_bridge_mdb_htable *mdb,
 468                                 struct br_ip *dst);
 469 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
 470                                 struct net_bridge_port *port, struct br_ip *group);
 471 extern void br_multicast_free_pg(struct rcu_head *head);
 472 extern struct net_bridge_port_group *br_multicast_new_port_group(
 473                                 struct net_bridge_port *port,
 474                                 struct br_ip *group,
 475                                 struct net_bridge_port_group *next,
 476                                 unsigned char state);
 477 extern void br_mdb_init(void);
 478 extern void br_mdb_uninit(void);
 479 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 480                           struct br_ip *group, int type);
 481
 482 #define mlock_dereference(X, br) \
 483         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 484
 485 #if IS_ENABLED(CONFIG_IPV6)
 486 #include <net/addrconf.h>
 487 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
 488 {
 489         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
 490                 return 1;
 491         return 0;
 492 }
 493 #endif
 494
 495 static inline bool br_multicast_is_router(struct net_bridge *br)
 496 {
 497         return br->multicast_router == 2 ||
 498                (br->multicast_router == 1 &&
 499                 timer_pending(&br->multicast_router_timer));
 500 }
 501 #else
 502 static inline int br_multicast_rcv(struct net_bridge *br,
 503                                    struct net_bridge_port *port,
 504                                    struct sk_buff *skb)
 505 {
 506         return 0;
 507 }
 508
 509 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 510                                                       struct sk_buff *skb, u16 vid)
 511 {
 512         return NULL;
 513 }
 514
 515 static inline void br_multicast_add_port(struct net_bridge_port *port)
 516 {
 517 }
 518
 519 static inline void br_multicast_del_port(struct net_bridge_port *port)
 520 {
 521 }
 522
 523 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 524 {
 525 }
 526
 527 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 528 {
 529 }
 530
 531 static inline void br_multicast_init(struct net_bridge *br)
 532 {
 533 }
 534
 535 static inline void br_multicast_open(struct net_bridge *br)
 536 {
 537 }
 538
 539 static inline void br_multicast_stop(struct net_bridge *br)
 540 {
 541 }
 542
 543 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 544                                         struct sk_buff *skb)
 545 {
 546 }
 547
 548 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 549                                         struct sk_buff *skb,
 550                                         struct sk_buff *skb2)
 551 {
 552 }
 553 static inline bool br_multicast_is_router(struct net_bridge *br)
 554 {
 555         return 0;
 556 }
 557 static inline void br_mdb_init(void)
 558 {
 559 }
 560 static inline void br_mdb_uninit(void)
 561 {
 562 }
 563 #endif
 564
 565 /* br_vlan.c */
 566 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 567 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 568                                struct sk_buff *skb, u16 *vid);
 569 extern bool br_allowed_egress(struct net_bridge *br,
 570                               const struct net_port_vlans *v,
 571                               const struct sk_buff *skb);
 572 extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
 573                                       const struct net_port_vlans *v,
 574                                       struct sk_buff *skb);
 575 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 576 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
 577 extern void br_vlan_flush(struct net_bridge *br);
 578 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 579 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 580 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 581 extern void nbp_vlan_flush(struct net_bridge_port *port);
 582 extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
 583
 584 static inline struct net_port_vlans *br_get_vlan_info(
 585                                                 const struct net_bridge *br)
 586 {
 587         return rcu_dereference_rtnl(br->vlan_info);
 588 }
 589
 590 static inline struct net_port_vlans *nbp_get_vlan_info(
 591                                                 const struct net_bridge_port *p)
 592 {
 593         return rcu_dereference_rtnl(p->vlan_info);
 594 }
 595
 596 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 597  * skb, the vlan tag will always be present if the frame was tagged.
 598  */
 599 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 600 {
 601         int err = 0;
 602
 603         if (vlan_tx_tag_present(skb))
 604                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 605         else {
 606                 *vid = 0;
 607                 err = -EINVAL;
 608         }
 609
 610         return err;
 611 }
 612
 613 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 614 {
 615         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 616          * vid wasn't set
 617          */
 618         smp_rmb();
 619         return (v->pvid & VLAN_TAG_PRESENT) ?
 620                         (v->pvid & ~VLAN_TAG_PRESENT) :
 621                         VLAN_N_VID;
 622 }
 623
 624 #else
 625 static inline bool br_allowed_ingress(struct net_bridge *br,
 626                                       struct net_port_vlans *v,
 627                                       struct sk_buff *skb,
 628                                       u16 *vid)
 629 {
 630         return true;
 631 }
 632
 633 static inline bool br_allowed_egress(struct net_bridge *br,
 634                                      const struct net_port_vlans *v,
 635                                      const struct sk_buff *skb)
 636 {
 637         return true;
 638 }
 639
 640 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 641                                              const struct net_port_vlans *v,
 642                                              struct sk_buff *skb)
 643 {
 644         return skb;
 645 }
 646
 647 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 648 {
 649         return -EOPNOTSUPP;
 650 }
 651
 652 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 653 {
 654         return -EOPNOTSUPP;
 655 }
 656
 657 static inline void br_vlan_flush(struct net_bridge *br)
 658 {
 659 }
 660
 661 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 662 {
 663         return -EOPNOTSUPP;
 664 }
 665
 666 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 667 {
 668         return -EOPNOTSUPP;
 669 }
 670
 671 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 672 {
 673 }
 674
 675 static inline struct net_port_vlans *br_get_vlan_info(
 676                                                 const struct net_bridge *br)
 677 {
 678         return NULL;
 679 }
 680 static inline struct net_port_vlans *nbp_get_vlan_info(
 681                                                 const struct net_bridge_port *p)
 682 {
 683         return NULL;
 684 }
 685
 686 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
 687 {
 688         return false;
 689 }
 690
 691 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 692 {
 693         return 0;
 694 }
 695 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 696 {
 697         return VLAN_N_VID;      /* Returns invalid vid */
 698 }
 699 #endif
 700
 701 /* br_netfilter.c */
 702 #ifdef CONFIG_BRIDGE_NETFILTER
 703 extern int br_netfilter_init(void);
 704 extern void br_netfilter_fini(void);
 705 extern void br_netfilter_rtable_init(struct net_bridge *);
 706 #else
 707 #define br_netfilter_init()     (0)
 708 #define br_netfilter_fini()     do { } while(0)
 709 #define br_netfilter_rtable_init(x)
 710 #endif
 711
 712 /* br_stp.c */
 713 extern void br_log_state(const struct net_bridge_port *p);
 714 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 715                                            u16 port_no);
 716 extern void br_init_port(struct net_bridge_port *p);
 717 extern void br_become_designated_port(struct net_bridge_port *p);
 718
 719 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 720 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 721 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
 722
 723
 724 /* br_stp_if.c */
 725 extern void br_stp_enable_bridge(struct net_bridge *br);
 726 extern void br_stp_disable_bridge(struct net_bridge *br);
 727 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 728 extern void br_stp_enable_port(struct net_bridge_port *p);
 729 extern void br_stp_disable_port(struct net_bridge_port *p);
 730 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 731 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 732 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 733                                        u16 newprio);
 734 extern int br_stp_set_port_priority(struct net_bridge_port *p,
 735                                     unsigned long newprio);
 736 extern int br_stp_set_path_cost(struct net_bridge_port *p,
 737                                 unsigned long path_cost);
 738 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 739
 740 /* br_stp_bpdu.c */
 741 struct stp_proto;
 742 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 743                        struct net_device *dev);
 744
 745 /* br_stp_timer.c */
 746 extern void br_stp_timer_init(struct net_bridge *br);
 747 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 748 extern unsigned long br_timer_value(const struct timer_list *timer);
 749
 750 /* br.c */
 751 #if IS_ENABLED(CONFIG_ATM_LANE)
 752 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 753 #endif
 754
 755 /* br_netlink.c */
 756 extern struct rtnl_link_ops br_link_ops;
 757 extern int br_netlink_init(void);
 758 extern void br_netlink_fini(void);
 759 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 760 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 761 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 762 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 763                       struct net_device *dev, u32 filter_mask);
 764
 765 #ifdef CONFIG_SYSFS
 766 /* br_sysfs_if.c */
 767 extern const struct sysfs_ops brport_sysfs_ops;
 768 extern int br_sysfs_addif(struct net_bridge_port *p);
 769 extern int br_sysfs_renameif(struct net_bridge_port *p);
 770
 771 /* br_sysfs_br.c */
 772 extern int br_sysfs_addbr(struct net_device *dev);
 773 extern void br_sysfs_delbr(struct net_device *dev);
 774
 775 #else
 776
 777 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 778 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 779 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 780 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 781 #endif /* CONFIG_SYSFS */
 782
 783 #endif