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 extern void br_fdb_update(struct net_bridge *br,
 387                           struct net_bridge_port *source,
 388                           const unsigned char *addr,
 389                           u16 vid);
 390
 391 extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 392                          struct net_device *dev,
 393                          const unsigned char *addr);
 394 extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
 395                       struct net_device *dev,
 396                       const unsigned char *addr,
 397                       u16 nlh_flags);
 398 extern int br_fdb_dump(struct sk_buff *skb,
 399                        struct netlink_callback *cb,
 400                        struct net_device *dev,
 401                        int idx);
 402
 403 /* br_forward.c */
 404 extern void br_deliver(const struct net_bridge_port *to,
 405                 struct sk_buff *skb);
 406 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
 407 extern void br_forward(const struct net_bridge_port *to,
 408                 struct sk_buff *skb, struct sk_buff *skb0);
 409 extern int br_forward_finish(struct sk_buff *skb);
 410 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
 411 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 412                              struct sk_buff *skb2);
 413
 414 /* br_if.c */
 415 extern void br_port_carrier_check(struct net_bridge_port *p);
 416 extern int br_add_bridge(struct net *net, const char *name);
 417 extern int br_del_bridge(struct net *net, const char *name);
 418 extern void br_net_exit(struct net *net);
 419 extern int br_add_if(struct net_bridge *br,
 420               struct net_device *dev);
 421 extern int br_del_if(struct net_bridge *br,
 422               struct net_device *dev);
 423 extern int br_min_mtu(const struct net_bridge *br);
 424 extern netdev_features_t br_features_recompute(struct net_bridge *br,
 425         netdev_features_t features);
 426
 427 /* br_input.c */
 428 extern int br_handle_frame_finish(struct sk_buff *skb);
 429 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 430
 431 /* br_ioctl.c */
 432 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 433 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
 434
 435 /* br_multicast.c */
 436 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 437 extern unsigned int br_mdb_rehash_seq;
 438 extern int br_multicast_rcv(struct net_bridge *br,
 439                             struct net_bridge_port *port,
 440                             struct sk_buff *skb);
 441 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 442                                                struct sk_buff *skb);
 443 extern void br_multicast_add_port(struct net_bridge_port *port);
 444 extern void br_multicast_del_port(struct net_bridge_port *port);
 445 extern void br_multicast_enable_port(struct net_bridge_port *port);
 446 extern void br_multicast_disable_port(struct net_bridge_port *port);
 447 extern void br_multicast_init(struct net_bridge *br);
 448 extern void br_multicast_open(struct net_bridge *br);
 449 extern void br_multicast_stop(struct net_bridge *br);
 450 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 451                                  struct sk_buff *skb);
 452 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 453                                  struct sk_buff *skb, struct sk_buff *skb2);
 454 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 455 extern int br_multicast_set_port_router(struct net_bridge_port *p,
 456                                         unsigned long val);
 457 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 458 extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 459 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 460 extern struct net_bridge_mdb_entry *br_mdb_ip_get(
 461                                 struct net_bridge_mdb_htable *mdb,
 462                                 struct br_ip *dst);
 463 extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
 464                                 struct net_bridge_port *port, struct br_ip *group);
 465 extern void br_multicast_free_pg(struct rcu_head *head);
 466 extern struct net_bridge_port_group *br_multicast_new_port_group(
 467                                 struct net_bridge_port *port,
 468                                 struct br_ip *group,
 469                                 struct net_bridge_port_group *next,
 470                                 unsigned char state);
 471 extern void br_mdb_init(void);
 472 extern void br_mdb_uninit(void);
 473 extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 474                           struct br_ip *group, int type);
 475
 476 #define mlock_dereference(X, br) \
 477         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 478
 479 #if IS_ENABLED(CONFIG_IPV6)
 480 #include <net/addrconf.h>
 481 static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
 482 {
 483         if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
 484                 return 1;
 485         return 0;
 486 }
 487 #endif
 488
 489 static inline bool br_multicast_is_router(struct net_bridge *br)
 490 {
 491         return br->multicast_router == 2 ||
 492                (br->multicast_router == 1 &&
 493                 timer_pending(&br->multicast_router_timer));
 494 }
 495 #else
 496 static inline int br_multicast_rcv(struct net_bridge *br,
 497                                    struct net_bridge_port *port,
 498                                    struct sk_buff *skb)
 499 {
 500         return 0;
 501 }
 502
 503 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 504                                                       struct sk_buff *skb)
 505 {
 506         return NULL;
 507 }
 508
 509 static inline void br_multicast_add_port(struct net_bridge_port *port)
 510 {
 511 }
 512
 513 static inline void br_multicast_del_port(struct net_bridge_port *port)
 514 {
 515 }
 516
 517 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 518 {
 519 }
 520
 521 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 522 {
 523 }
 524
 525 static inline void br_multicast_init(struct net_bridge *br)
 526 {
 527 }
 528
 529 static inline void br_multicast_open(struct net_bridge *br)
 530 {
 531 }
 532
 533 static inline void br_multicast_stop(struct net_bridge *br)
 534 {
 535 }
 536
 537 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 538                                         struct sk_buff *skb)
 539 {
 540 }
 541
 542 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 543                                         struct sk_buff *skb,
 544                                         struct sk_buff *skb2)
 545 {
 546 }
 547 static inline bool br_multicast_is_router(struct net_bridge *br)
 548 {
 549         return 0;
 550 }
 551 static inline void br_mdb_init(void)
 552 {
 553 }
 554 static inline void br_mdb_uninit(void)
 555 {
 556 }
 557 #endif
 558
 559 /* br_vlan.c */
 560 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 561 extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 562                                struct sk_buff *skb, u16 *vid);
 563 extern bool br_allowed_egress(struct net_bridge *br,
 564                               const struct net_port_vlans *v,
 565                               const struct sk_buff *skb);
 566 extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
 567                                       const struct net_port_vlans *v,
 568                                       struct sk_buff *skb);
 569 extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 570 extern int br_vlan_delete(struct net_bridge *br, u16 vid);
 571 extern void br_vlan_flush(struct net_bridge *br);
 572 extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 573 extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 574 extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 575 extern void nbp_vlan_flush(struct net_bridge_port *port);
 576
 577 static inline struct net_port_vlans *br_get_vlan_info(
 578                                                 const struct net_bridge *br)
 579 {
 580         return rcu_dereference_rtnl(br->vlan_info);
 581 }
 582
 583 static inline struct net_port_vlans *nbp_get_vlan_info(
 584                                                 const struct net_bridge_port *p)
 585 {
 586         return rcu_dereference_rtnl(p->vlan_info);
 587 }
 588
 589 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 590  * skb, the vlan tag will always be present if the frame was tagged.
 591  */
 592 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 593 {
 594         int err = 0;
 595
 596         if (vlan_tx_tag_present(skb))
 597                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 598         else {
 599                 *vid = 0;
 600                 err = -EINVAL;
 601         }
 602
 603         return err;
 604 }
 605
 606 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 607 {
 608         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 609          * vid wasn't set
 610          */
 611         smp_rmb();
 612         return (v->pvid & VLAN_TAG_PRESENT) ?
 613                         (v->pvid & ~VLAN_TAG_PRESENT) :
 614                         VLAN_N_VID;
 615 }
 616
 617 #else
 618 static inline bool br_allowed_ingress(struct net_bridge *br,
 619                                       struct net_port_vlans *v,
 620                                       struct sk_buff *skb,
 621                                       u16 *vid)
 622 {
 623         return true;
 624 }
 625
 626 static inline bool br_allowed_egress(struct net_bridge *br,
 627                                      const struct net_port_vlans *v,
 628                                      const struct sk_buff *skb)
 629 {
 630         return true;
 631 }
 632
 633 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 634                                              const struct net_port_vlans *v,
 635                                              struct sk_buff *skb)
 636 {
 637         return skb;
 638 }
 639
 640 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 641 {
 642         return -EOPNOTSUPP;
 643 }
 644
 645 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 646 {
 647         return -EOPNOTSUPP;
 648 }
 649
 650 static inline void br_vlan_flush(struct net_bridge *br)
 651 {
 652 }
 653
 654 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 655 {
 656         return -EOPNOTSUPP;
 657 }
 658
 659 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 660 {
 661         return -EOPNOTSUPP;
 662 }
 663
 664 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 665 {
 666 }
 667
 668 static inline struct net_port_vlans *br_get_vlan_info(
 669                                                 const struct net_bridge *br)
 670 {
 671         return NULL;
 672 }
 673 static inline struct net_port_vlans *nbp_get_vlan_info(
 674                                                 const struct net_bridge_port *p)
 675 {
 676         return NULL;
 677 }
 678
 679 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 680 {
 681         return 0;
 682 }
 683 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 684 {
 685         return VLAN_N_VID;      /* Returns invalid vid */
 686 }
 687 #endif
 688
 689 /* br_netfilter.c */
 690 #ifdef CONFIG_BRIDGE_NETFILTER
 691 extern int br_netfilter_init(void);
 692 extern void br_netfilter_fini(void);
 693 extern void br_netfilter_rtable_init(struct net_bridge *);
 694 #else
 695 #define br_netfilter_init()     (0)
 696 #define br_netfilter_fini()     do { } while(0)
 697 #define br_netfilter_rtable_init(x)
 698 #endif
 699
 700 /* br_stp.c */
 701 extern void br_log_state(const struct net_bridge_port *p);
 702 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
 703                                            u16 port_no);
 704 extern void br_init_port(struct net_bridge_port *p);
 705 extern void br_become_designated_port(struct net_bridge_port *p);
 706
 707 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 708 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
 709 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
 710
 711
 712 /* br_stp_if.c */
 713 extern void br_stp_enable_bridge(struct net_bridge *br);
 714 extern void br_stp_disable_bridge(struct net_bridge *br);
 715 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 716 extern void br_stp_enable_port(struct net_bridge_port *p);
 717 extern void br_stp_disable_port(struct net_bridge_port *p);
 718 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 719 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 720 extern void br_stp_set_bridge_priority(struct net_bridge *br,
 721                                        u16 newprio);
 722 extern int br_stp_set_port_priority(struct net_bridge_port *p,
 723                                     unsigned long newprio);
 724 extern int br_stp_set_path_cost(struct net_bridge_port *p,
 725                                 unsigned long path_cost);
 726 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 727
 728 /* br_stp_bpdu.c */
 729 struct stp_proto;
 730 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 731                        struct net_device *dev);
 732
 733 /* br_stp_timer.c */
 734 extern void br_stp_timer_init(struct net_bridge *br);
 735 extern void br_stp_port_timer_init(struct net_bridge_port *p);
 736 extern unsigned long br_timer_value(const struct timer_list *timer);
 737
 738 /* br.c */
 739 #if IS_ENABLED(CONFIG_ATM_LANE)
 740 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 741 #endif
 742
 743 /* br_netlink.c */
 744 extern struct rtnl_link_ops br_link_ops;
 745 extern int br_netlink_init(void);
 746 extern void br_netlink_fini(void);
 747 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
 748 extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 749 extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 750 extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 751                       struct net_device *dev, u32 filter_mask);
 752
 753 #ifdef CONFIG_SYSFS
 754 /* br_sysfs_if.c */
 755 extern const struct sysfs_ops brport_sysfs_ops;
 756 extern int br_sysfs_addif(struct net_bridge_port *p);
 757 extern int br_sysfs_renameif(struct net_bridge_port *p);
 758
 759 /* br_sysfs_br.c */
 760 extern int br_sysfs_addbr(struct net_device *dev);
 761 extern void br_sysfs_delbr(struct net_device *dev);
 762
 763 #else
 764
 765 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 766 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 767 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 768 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 769 #endif /* CONFIG_SYSFS */
 770
 771 #endif