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