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