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[ETH_ALEN];
  50 };
  51
  52 struct mac_addr
  53 {
  54         unsigned char   addr[ETH_ALEN];
  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 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  70 /* our own querier */
  71 struct bridge_mcast_own_query {
  72         struct timer_list       timer;
  73         u32                     startup_sent;
  74 };
  75
  76 /* other querier */
  77 struct bridge_mcast_other_query {
  78         struct timer_list               timer;
  79         unsigned long                   delay_time;
  80 };
  81
  82 /* selected querier */
  83 struct bridge_mcast_querier {
  84         struct br_ip addr;
  85 };
  86 #endif
  87
  88 struct net_port_vlans {
  89         u16                             port_idx;
  90         u16                             pvid;
  91         union {
  92                 struct net_bridge_port          *port;
  93                 struct net_bridge               *br;
  94         }                               parent;
  95         struct rcu_head                 rcu;
  96         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
  97         unsigned long                   untagged_bitmap[BR_VLAN_BITMAP_LEN];
  98         u16                             num_vlans;
  99 };
 100
 101 struct net_bridge_fdb_entry
 102 {
 103         struct hlist_node               hlist;
 104         struct net_bridge_port          *dst;
 105
 106         struct rcu_head                 rcu;
 107         unsigned long                   updated;
 108         unsigned long                   used;
 109         mac_addr                        addr;
 110         unsigned char                   is_local;
 111         unsigned char                   is_static;
 112         unsigned char                   added_by_user;
 113         __u16                           vlan_id;
 114 };
 115
 116 struct net_bridge_port_group {
 117         struct net_bridge_port          *port;
 118         struct net_bridge_port_group __rcu *next;
 119         struct hlist_node               mglist;
 120         struct rcu_head                 rcu;
 121         struct timer_list               timer;
 122         struct br_ip                    addr;
 123         unsigned char                   state;
 124 };
 125
 126 struct net_bridge_mdb_entry
 127 {
 128         struct hlist_node               hlist[2];
 129         struct net_bridge               *br;
 130         struct net_bridge_port_group __rcu *ports;
 131         struct rcu_head                 rcu;
 132         struct timer_list               timer;
 133         struct br_ip                    addr;
 134         bool                            mglist;
 135 };
 136
 137 struct net_bridge_mdb_htable
 138 {
 139         struct hlist_head               *mhash;
 140         struct rcu_head                 rcu;
 141         struct net_bridge_mdb_htable    *old;
 142         u32                             size;
 143         u32                             max;
 144         u32                             secret;
 145         u32                             ver;
 146 };
 147
 148 struct net_bridge_port
 149 {
 150         struct net_bridge               *br;
 151         struct net_device               *dev;
 152         struct list_head                list;
 153
 154         /* STP */
 155         u8                              priority;
 156         u8                              state;
 157         u16                             port_no;
 158         unsigned char                   topology_change_ack;
 159         unsigned char                   config_pending;
 160         port_id                         port_id;
 161         port_id                         designated_port;
 162         bridge_id                       designated_root;
 163         bridge_id                       designated_bridge;
 164         u32                             path_cost;
 165         u32                             designated_cost;
 166         unsigned long                   designated_age;
 167
 168         struct timer_list               forward_delay_timer;
 169         struct timer_list               hold_timer;
 170         struct timer_list               message_age_timer;
 171         struct kobject                  kobj;
 172         struct rcu_head                 rcu;
 173
 174         unsigned long                   flags;
 175 #define BR_HAIRPIN_MODE         0x00000001
 176 #define BR_BPDU_GUARD           0x00000002
 177 #define BR_ROOT_BLOCK           0x00000004
 178 #define BR_MULTICAST_FAST_LEAVE 0x00000008
 179 #define BR_ADMIN_COST           0x00000010
 180 #define BR_LEARNING             0x00000020
 181 #define BR_FLOOD                0x00000040
 182 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
 183 #define BR_PROMISC              0x00000080
 184
 185 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 186         struct bridge_mcast_own_query   ip4_own_query;
 187 #if IS_ENABLED(CONFIG_IPV6)
 188         struct bridge_mcast_own_query   ip6_own_query;
 189 #endif /* IS_ENABLED(CONFIG_IPV6) */
 190         unsigned char                   multicast_router;
 191         struct timer_list               multicast_router_timer;
 192         struct hlist_head               mglist;
 193         struct hlist_node               rlist;
 194 #endif
 195
 196 #ifdef CONFIG_SYSFS
 197         char                            sysfs_name[IFNAMSIZ];
 198 #endif
 199
 200 #ifdef CONFIG_NET_POLL_CONTROLLER
 201         struct netpoll                  *np;
 202 #endif
 203 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 204         struct net_port_vlans __rcu     *vlan_info;
 205 #endif
 206 };
 207
 208 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 209 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 210
 211 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 212
 213 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 214 {
 215         return rcu_dereference(dev->rx_handler_data);
 216 }
 217
 218 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 219 {
 220         return br_port_exists(dev) ?
 221                 rtnl_dereference(dev->rx_handler_data) : NULL;
 222 }
 223
 224 struct net_bridge
 225 {
 226         spinlock_t                      lock;
 227         struct list_head                port_list;
 228         struct net_device               *dev;
 229
 230         struct pcpu_sw_netstats         __percpu *stats;
 231         spinlock_t                      hash_lock;
 232         struct hlist_head               hash[BR_HASH_SIZE];
 233 #ifdef CONFIG_BRIDGE_NETFILTER
 234         struct rtable                   fake_rtable;
 235         bool                            nf_call_iptables;
 236         bool                            nf_call_ip6tables;
 237         bool                            nf_call_arptables;
 238 #endif
 239         u16                             group_fwd_mask;
 240
 241         /* STP */
 242         bridge_id                       designated_root;
 243         bridge_id                       bridge_id;
 244         u32                             root_path_cost;
 245         unsigned long                   max_age;
 246         unsigned long                   hello_time;
 247         unsigned long                   forward_delay;
 248         unsigned long                   bridge_max_age;
 249         unsigned long                   ageing_time;
 250         unsigned long                   bridge_hello_time;
 251         unsigned long                   bridge_forward_delay;
 252
 253         u8                              group_addr[ETH_ALEN];
 254         u16                             root_port;
 255
 256         enum {
 257                 BR_NO_STP,              /* no spanning tree */
 258                 BR_KERNEL_STP,          /* old STP in kernel */
 259                 BR_USER_STP,            /* new RSTP in userspace */
 260         } stp_enabled;
 261
 262         unsigned char                   topology_change;
 263         unsigned char                   topology_change_detected;
 264
 265 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 266         unsigned char                   multicast_router;
 267
 268         u8                              multicast_disabled:1;
 269         u8                              multicast_querier:1;
 270         u8                              multicast_query_use_ifaddr:1;
 271
 272         u32                             hash_elasticity;
 273         u32                             hash_max;
 274
 275         u32                             multicast_last_member_count;
 276         u32                             multicast_startup_query_count;
 277
 278         unsigned long                   multicast_last_member_interval;
 279         unsigned long                   multicast_membership_interval;
 280         unsigned long                   multicast_querier_interval;
 281         unsigned long                   multicast_query_interval;
 282         unsigned long                   multicast_query_response_interval;
 283         unsigned long                   multicast_startup_query_interval;
 284
 285         spinlock_t                      multicast_lock;
 286         struct net_bridge_mdb_htable __rcu *mdb;
 287         struct hlist_head               router_list;
 288
 289         struct timer_list               multicast_router_timer;
 290         struct bridge_mcast_other_query ip4_other_query;
 291         struct bridge_mcast_own_query   ip4_own_query;
 292         struct bridge_mcast_querier     ip4_querier;
 293 #if IS_ENABLED(CONFIG_IPV6)
 294         struct bridge_mcast_other_query ip6_other_query;
 295         struct bridge_mcast_own_query   ip6_own_query;
 296         struct bridge_mcast_querier     ip6_querier;
 297 #endif /* IS_ENABLED(CONFIG_IPV6) */
 298 #endif
 299
 300         struct timer_list               hello_timer;
 301         struct timer_list               tcn_timer;
 302         struct timer_list               topology_change_timer;
 303         struct timer_list               gc_timer;
 304         struct kobject                  *ifobj;
 305         u32                             auto_cnt;
 306 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 307         u8                              vlan_enabled;
 308         struct net_port_vlans __rcu     *vlan_info;
 309 #endif
 310 };
 311
 312 struct br_input_skb_cb {
 313         struct net_device *brdev;
 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 315         int igmp;
 316         int mrouters_only;
 317 #endif
 318 };
 319
 320 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 321
 322 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 323 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 324 #else
 325 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 326 #endif
 327
 328 #define br_printk(level, br, format, args...)   \
 329         printk(level "%s: " format, (br)->dev->name, ##args)
 330
 331 #define br_err(__br, format, args...)                   \
 332         br_printk(KERN_ERR, __br, format, ##args)
 333 #define br_warn(__br, format, args...)                  \
 334         br_printk(KERN_WARNING, __br, format, ##args)
 335 #define br_notice(__br, format, args...)                \
 336         br_printk(KERN_NOTICE, __br, format, ##args)
 337 #define br_info(__br, format, args...)                  \
 338         br_printk(KERN_INFO, __br, format, ##args)
 339
 340 #define br_debug(br, format, args...)                   \
 341         pr_debug("%s: " format,  (br)->dev->name, ##args)
 342
 343 /* called under bridge lock */
 344 static inline int br_is_root_bridge(const struct net_bridge *br)
 345 {
 346         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 347 }
 348
 349 /* br_device.c */
 350 void br_dev_setup(struct net_device *dev);
 351 void br_dev_delete(struct net_device *dev, struct list_head *list);
 352 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 353 #ifdef CONFIG_NET_POLL_CONTROLLER
 354 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 355                                        struct sk_buff *skb)
 356 {
 357         struct netpoll *np = p->np;
 358
 359         if (np)
 360                 netpoll_send_skb(np, skb);
 361 }
 362
 363 int br_netpoll_enable(struct net_bridge_port *p);
 364 void br_netpoll_disable(struct net_bridge_port *p);
 365 #else
 366 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 367                                        struct sk_buff *skb)
 368 {
 369 }
 370
 371 static inline int br_netpoll_enable(struct net_bridge_port *p)
 372 {
 373         return 0;
 374 }
 375
 376 static inline void br_netpoll_disable(struct net_bridge_port *p)
 377 {
 378 }
 379 #endif
 380
 381 /* br_fdb.c */
 382 int br_fdb_init(void);
 383 void br_fdb_fini(void);
 384 void br_fdb_flush(struct net_bridge *br);
 385 void br_fdb_find_delete_local(struct net_bridge *br,
 386                               const struct net_bridge_port *p,
 387                               const unsigned char *addr, u16 vid);
 388 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 389 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 390 void br_fdb_cleanup(unsigned long arg);
 391 void br_fdb_delete_by_port(struct net_bridge *br,
 392                            const struct net_bridge_port *p, int do_all);
 393 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 394                                           const unsigned char *addr, __u16 vid);
 395 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 396 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 397                    unsigned long off);
 398 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 399                   const unsigned char *addr, u16 vid);
 400 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 401                    const unsigned char *addr, u16 vid, bool added_by_user);
 402
 403 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 404                   struct net_device *dev, const unsigned char *addr);
 405 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 406                const unsigned char *addr, u16 nlh_flags);
 407 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 408                 struct net_device *dev, int idx);
 409 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 410 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 411
 412 /* br_forward.c */
 413 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
 414 int br_dev_queue_push_xmit(struct sk_buff *skb);
 415 void br_forward(const struct net_bridge_port *to,
 416                 struct sk_buff *skb, struct sk_buff *skb0);
 417 int br_forward_finish(struct sk_buff *skb);
 418 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
 419 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 420                       struct sk_buff *skb2, bool unicast);
 421
 422 /* br_if.c */
 423 void br_port_carrier_check(struct net_bridge_port *p);
 424 int br_add_bridge(struct net *net, const char *name);
 425 int br_del_bridge(struct net *net, const char *name);
 426 int br_add_if(struct net_bridge *br, struct net_device *dev);
 427 int br_del_if(struct net_bridge *br, struct net_device *dev);
 428 int br_min_mtu(const struct net_bridge *br);
 429 netdev_features_t br_features_recompute(struct net_bridge *br,
 430                                         netdev_features_t features);
 431 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 432 void br_manage_promisc(struct net_bridge *br);
 433
 434 /* br_input.c */
 435 int br_handle_frame_finish(struct sk_buff *skb);
 436 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 437
 438 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 439 {
 440         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 441 }
 442
 443 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 444 {
 445         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 446 }
 447
 448 /* br_ioctl.c */
 449 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 450 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 451                              void __user *arg);
 452
 453 /* br_multicast.c */
 454 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 455 extern unsigned int br_mdb_rehash_seq;
 456 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 457                      struct sk_buff *skb, u16 vid);
 458 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 459                                         struct sk_buff *skb, u16 vid);
 460 void br_multicast_add_port(struct net_bridge_port *port);
 461 void br_multicast_del_port(struct net_bridge_port *port);
 462 void br_multicast_enable_port(struct net_bridge_port *port);
 463 void br_multicast_disable_port(struct net_bridge_port *port);
 464 void br_multicast_init(struct net_bridge *br);
 465 void br_multicast_open(struct net_bridge *br);
 466 void br_multicast_stop(struct net_bridge *br);
 467 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 468                           struct sk_buff *skb);
 469 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 470                           struct sk_buff *skb, struct sk_buff *skb2);
 471 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 472 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 473 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 474 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 475 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 476 struct net_bridge_mdb_entry *
 477 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
 478 struct net_bridge_mdb_entry *
 479 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
 480                        struct br_ip *group);
 481 void br_multicast_free_pg(struct rcu_head *head);
 482 struct net_bridge_port_group *
 483 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 484                             struct net_bridge_port_group __rcu *next,
 485                             unsigned char state);
 486 void br_mdb_init(void);
 487 void br_mdb_uninit(void);
 488 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 489                    struct br_ip *group, int type);
 490
 491 #define mlock_dereference(X, br) \
 492         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 493
 494 static inline bool br_multicast_is_router(struct net_bridge *br)
 495 {
 496         return br->multicast_router == 2 ||
 497                (br->multicast_router == 1 &&
 498                 timer_pending(&br->multicast_router_timer));
 499 }
 500
 501 static inline bool
 502 __br_multicast_querier_exists(struct net_bridge *br,
 503                               struct bridge_mcast_other_query *querier)
 504 {
 505         return time_is_before_jiffies(querier->delay_time) &&
 506                (br->multicast_querier || timer_pending(&querier->timer));
 507 }
 508
 509 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 510                                                struct ethhdr *eth)
 511 {
 512         switch (eth->h_proto) {
 513         case (htons(ETH_P_IP)):
 514                 return __br_multicast_querier_exists(br, &br->ip4_other_query);
 515 #if IS_ENABLED(CONFIG_IPV6)
 516         case (htons(ETH_P_IPV6)):
 517                 return __br_multicast_querier_exists(br, &br->ip6_other_query);
 518 #endif
 519         default:
 520                 return false;
 521         }
 522 }
 523 #else
 524 static inline int br_multicast_rcv(struct net_bridge *br,
 525                                    struct net_bridge_port *port,
 526                                    struct sk_buff *skb,
 527                                    u16 vid)
 528 {
 529         return 0;
 530 }
 531
 532 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 533                                                       struct sk_buff *skb, u16 vid)
 534 {
 535         return NULL;
 536 }
 537
 538 static inline void br_multicast_add_port(struct net_bridge_port *port)
 539 {
 540 }
 541
 542 static inline void br_multicast_del_port(struct net_bridge_port *port)
 543 {
 544 }
 545
 546 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 547 {
 548 }
 549
 550 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 551 {
 552 }
 553
 554 static inline void br_multicast_init(struct net_bridge *br)
 555 {
 556 }
 557
 558 static inline void br_multicast_open(struct net_bridge *br)
 559 {
 560 }
 561
 562 static inline void br_multicast_stop(struct net_bridge *br)
 563 {
 564 }
 565
 566 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 567                                         struct sk_buff *skb)
 568 {
 569 }
 570
 571 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 572                                         struct sk_buff *skb,
 573                                         struct sk_buff *skb2)
 574 {
 575 }
 576 static inline bool br_multicast_is_router(struct net_bridge *br)
 577 {
 578         return 0;
 579 }
 580 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 581                                                struct ethhdr *eth)
 582 {
 583         return false;
 584 }
 585 static inline void br_mdb_init(void)
 586 {
 587 }
 588 static inline void br_mdb_uninit(void)
 589 {
 590 }
 591 #endif
 592
 593 /* br_vlan.c */
 594 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 595 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 596                         struct sk_buff *skb, u16 *vid);
 597 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
 598                        const struct sk_buff *skb);
 599 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 600 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 601                                const struct net_port_vlans *v,
 602                                struct sk_buff *skb);
 603 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 604 int br_vlan_delete(struct net_bridge *br, u16 vid);
 605 void br_vlan_flush(struct net_bridge *br);
 606 bool br_vlan_find(struct net_bridge *br, u16 vid);
 607 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 608 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 609 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 610 void nbp_vlan_flush(struct net_bridge_port *port);
 611 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
 612
 613 static inline struct net_port_vlans *br_get_vlan_info(
 614                                                 const struct net_bridge *br)
 615 {
 616         return rcu_dereference_rtnl(br->vlan_info);
 617 }
 618
 619 static inline struct net_port_vlans *nbp_get_vlan_info(
 620                                                 const struct net_bridge_port *p)
 621 {
 622         return rcu_dereference_rtnl(p->vlan_info);
 623 }
 624
 625 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 626  * skb, the vlan tag will always be present if the frame was tagged.
 627  */
 628 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 629 {
 630         int err = 0;
 631
 632         if (vlan_tx_tag_present(skb))
 633                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 634         else {
 635                 *vid = 0;
 636                 err = -EINVAL;
 637         }
 638
 639         return err;
 640 }
 641
 642 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 643 {
 644         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 645          * vid wasn't set
 646          */
 647         smp_rmb();
 648         return v->pvid ?: VLAN_N_VID;
 649 }
 650
 651 static inline int br_vlan_enabled(struct net_bridge *br)
 652 {
 653         return br->vlan_enabled;
 654 }
 655 #else
 656 static inline bool br_allowed_ingress(struct net_bridge *br,
 657                                       struct net_port_vlans *v,
 658                                       struct sk_buff *skb,
 659                                       u16 *vid)
 660 {
 661         return true;
 662 }
 663
 664 static inline bool br_allowed_egress(struct net_bridge *br,
 665                                      const struct net_port_vlans *v,
 666                                      const struct sk_buff *skb)
 667 {
 668         return true;
 669 }
 670
 671 static inline bool br_should_learn(struct net_bridge_port *p,
 672                                    struct sk_buff *skb, u16 *vid)
 673 {
 674         return true;
 675 }
 676
 677 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 678                                              const struct net_port_vlans *v,
 679                                              struct sk_buff *skb)
 680 {
 681         return skb;
 682 }
 683
 684 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 685 {
 686         return -EOPNOTSUPP;
 687 }
 688
 689 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 690 {
 691         return -EOPNOTSUPP;
 692 }
 693
 694 static inline void br_vlan_flush(struct net_bridge *br)
 695 {
 696 }
 697
 698 static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
 699 {
 700         return false;
 701 }
 702
 703 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 704 {
 705         return -EOPNOTSUPP;
 706 }
 707
 708 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 709 {
 710         return -EOPNOTSUPP;
 711 }
 712
 713 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 714 {
 715 }
 716
 717 static inline struct net_port_vlans *br_get_vlan_info(
 718                                                 const struct net_bridge *br)
 719 {
 720         return NULL;
 721 }
 722 static inline struct net_port_vlans *nbp_get_vlan_info(
 723                                                 const struct net_bridge_port *p)
 724 {
 725         return NULL;
 726 }
 727
 728 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
 729 {
 730         return false;
 731 }
 732
 733 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 734 {
 735         return 0;
 736 }
 737 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 738 {
 739         return VLAN_N_VID;      /* Returns invalid vid */
 740 }
 741
 742 static inline int br_vlan_enabled(struct net_bridge *br)
 743 {
 744         return 0;
 745 }
 746 #endif
 747
 748 /* br_netfilter.c */
 749 #ifdef CONFIG_BRIDGE_NETFILTER
 750 int br_netfilter_init(void);
 751 void br_netfilter_fini(void);
 752 void br_netfilter_rtable_init(struct net_bridge *);
 753 #else
 754 #define br_netfilter_init()     (0)
 755 #define br_netfilter_fini()     do { } while (0)
 756 #define br_netfilter_rtable_init(x)
 757 #endif
 758
 759 /* br_stp.c */
 760 void br_log_state(const struct net_bridge_port *p);
 761 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
 762 void br_init_port(struct net_bridge_port *p);
 763 void br_become_designated_port(struct net_bridge_port *p);
 764
 765 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
 766 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 767 int br_set_hello_time(struct net_bridge *br, unsigned long x);
 768 int br_set_max_age(struct net_bridge *br, unsigned long x);
 769
 770
 771 /* br_stp_if.c */
 772 void br_stp_enable_bridge(struct net_bridge *br);
 773 void br_stp_disable_bridge(struct net_bridge *br);
 774 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 775 void br_stp_enable_port(struct net_bridge_port *p);
 776 void br_stp_disable_port(struct net_bridge_port *p);
 777 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 778 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 779 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
 780 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
 781 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
 782 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 783
 784 /* br_stp_bpdu.c */
 785 struct stp_proto;
 786 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 787                 struct net_device *dev);
 788
 789 /* br_stp_timer.c */
 790 void br_stp_timer_init(struct net_bridge *br);
 791 void br_stp_port_timer_init(struct net_bridge_port *p);
 792 unsigned long br_timer_value(const struct timer_list *timer);
 793
 794 /* br.c */
 795 #if IS_ENABLED(CONFIG_ATM_LANE)
 796 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 797 #endif
 798
 799 /* br_netlink.c */
 800 extern struct rtnl_link_ops br_link_ops;
 801 int br_netlink_init(void);
 802 void br_netlink_fini(void);
 803 void br_ifinfo_notify(int event, struct net_bridge_port *port);
 804 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 805 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 806 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
 807                u32 filter_mask);
 808
 809 #ifdef CONFIG_SYSFS
 810 /* br_sysfs_if.c */
 811 extern const struct sysfs_ops brport_sysfs_ops;
 812 int br_sysfs_addif(struct net_bridge_port *p);
 813 int br_sysfs_renameif(struct net_bridge_port *p);
 814
 815 /* br_sysfs_br.c */
 816 int br_sysfs_addbr(struct net_device *dev);
 817 void br_sysfs_delbr(struct net_device *dev);
 818
 819 #else
 820
 821 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 822 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 823 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 824 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 825 #endif /* CONFIG_SYSFS */
 826
 827 #endif