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 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  58 /* our own querier */
  59 struct bridge_mcast_own_query {
  60         struct timer_list       timer;
  61         u32                     startup_sent;
  62 };
  63
  64 /* other querier */
  65 struct bridge_mcast_other_query {
  66         struct timer_list               timer;
  67         unsigned long                   delay_time;
  68 };
  69
  70 /* selected querier */
  71 struct bridge_mcast_querier {
  72         struct br_ip addr;
  73         struct net_bridge_port __rcu    *port;
  74 };
  75 #endif
  76
  77 struct net_port_vlans {
  78         u16                             port_idx;
  79         u16                             pvid;
  80         union {
  81                 struct net_bridge_port          *port;
  82                 struct net_bridge               *br;
  83         }                               parent;
  84         struct rcu_head                 rcu;
  85         unsigned long                   vlan_bitmap[BR_VLAN_BITMAP_LEN];
  86         unsigned long                   untagged_bitmap[BR_VLAN_BITMAP_LEN];
  87         u16                             num_vlans;
  88 };
  89
  90 struct net_bridge_fdb_entry
  91 {
  92         struct hlist_node               hlist;
  93         struct net_bridge_port          *dst;
  94
  95         struct rcu_head                 rcu;
  96         unsigned long                   updated;
  97         unsigned long                   used;
  98         mac_addr                        addr;
  99         unsigned char                   is_local;
 100         unsigned char                   is_static;
 101         unsigned char                   added_by_user;
 102         __u16                           vlan_id;
 103 };
 104
 105 struct net_bridge_port_group {
 106         struct net_bridge_port          *port;
 107         struct net_bridge_port_group __rcu *next;
 108         struct hlist_node               mglist;
 109         struct rcu_head                 rcu;
 110         struct timer_list               timer;
 111         struct br_ip                    addr;
 112         unsigned char                   state;
 113 };
 114
 115 struct net_bridge_mdb_entry
 116 {
 117         struct hlist_node               hlist[2];
 118         struct net_bridge               *br;
 119         struct net_bridge_port_group __rcu *ports;
 120         struct rcu_head                 rcu;
 121         struct timer_list               timer;
 122         struct br_ip                    addr;
 123         bool                            mglist;
 124 };
 125
 126 struct net_bridge_mdb_htable
 127 {
 128         struct hlist_head               *mhash;
 129         struct rcu_head                 rcu;
 130         struct net_bridge_mdb_htable    *old;
 131         u32                             size;
 132         u32                             max;
 133         u32                             secret;
 134         u32                             ver;
 135 };
 136
 137 struct net_bridge_port
 138 {
 139         struct net_bridge               *br;
 140         struct net_device               *dev;
 141         struct list_head                list;
 142
 143         /* STP */
 144         u8                              priority;
 145         u8                              state;
 146         u16                             port_no;
 147         unsigned char                   topology_change_ack;
 148         unsigned char                   config_pending;
 149         port_id                         port_id;
 150         port_id                         designated_port;
 151         bridge_id                       designated_root;
 152         bridge_id                       designated_bridge;
 153         u32                             path_cost;
 154         u32                             designated_cost;
 155         unsigned long                   designated_age;
 156
 157         struct timer_list               forward_delay_timer;
 158         struct timer_list               hold_timer;
 159         struct timer_list               message_age_timer;
 160         struct kobject                  kobj;
 161         struct rcu_head                 rcu;
 162
 163         unsigned long                   flags;
 164 #define BR_HAIRPIN_MODE         0x00000001
 165 #define BR_BPDU_GUARD           0x00000002
 166 #define BR_ROOT_BLOCK           0x00000004
 167 #define BR_MULTICAST_FAST_LEAVE 0x00000008
 168 #define BR_ADMIN_COST           0x00000010
 169 #define BR_LEARNING             0x00000020
 170 #define BR_FLOOD                0x00000040
 171 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
 172 #define BR_PROMISC              0x00000080
 173
 174 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 175         struct bridge_mcast_own_query   ip4_own_query;
 176 #if IS_ENABLED(CONFIG_IPV6)
 177         struct bridge_mcast_own_query   ip6_own_query;
 178 #endif /* IS_ENABLED(CONFIG_IPV6) */
 179         unsigned char                   multicast_router;
 180         struct timer_list               multicast_router_timer;
 181         struct hlist_head               mglist;
 182         struct hlist_node               rlist;
 183 #endif
 184
 185 #ifdef CONFIG_SYSFS
 186         char                            sysfs_name[IFNAMSIZ];
 187 #endif
 188
 189 #ifdef CONFIG_NET_POLL_CONTROLLER
 190         struct netpoll                  *np;
 191 #endif
 192 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 193         struct net_port_vlans __rcu     *vlan_info;
 194 #endif
 195 };
 196
 197 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 198 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 199
 200 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 201
 202 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 203 {
 204         return rcu_dereference(dev->rx_handler_data);
 205 }
 206
 207 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 208 {
 209         return br_port_exists(dev) ?
 210                 rtnl_dereference(dev->rx_handler_data) : NULL;
 211 }
 212
 213 struct net_bridge
 214 {
 215         spinlock_t                      lock;
 216         struct list_head                port_list;
 217         struct net_device               *dev;
 218
 219         struct pcpu_sw_netstats         __percpu *stats;
 220         spinlock_t                      hash_lock;
 221         struct hlist_head               hash[BR_HASH_SIZE];
 222 #ifdef CONFIG_BRIDGE_NETFILTER
 223         struct rtable                   fake_rtable;
 224         bool                            nf_call_iptables;
 225         bool                            nf_call_ip6tables;
 226         bool                            nf_call_arptables;
 227 #endif
 228         u16                             group_fwd_mask;
 229
 230         /* STP */
 231         bridge_id                       designated_root;
 232         bridge_id                       bridge_id;
 233         u32                             root_path_cost;
 234         unsigned long                   max_age;
 235         unsigned long                   hello_time;
 236         unsigned long                   forward_delay;
 237         unsigned long                   bridge_max_age;
 238         unsigned long                   ageing_time;
 239         unsigned long                   bridge_hello_time;
 240         unsigned long                   bridge_forward_delay;
 241
 242         u8                              group_addr[ETH_ALEN];
 243         u16                             root_port;
 244
 245         enum {
 246                 BR_NO_STP,              /* no spanning tree */
 247                 BR_KERNEL_STP,          /* old STP in kernel */
 248                 BR_USER_STP,            /* new RSTP in userspace */
 249         } stp_enabled;
 250
 251         unsigned char                   topology_change;
 252         unsigned char                   topology_change_detected;
 253
 254 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 255         unsigned char                   multicast_router;
 256
 257         u8                              multicast_disabled:1;
 258         u8                              multicast_querier:1;
 259         u8                              multicast_query_use_ifaddr:1;
 260
 261         u32                             hash_elasticity;
 262         u32                             hash_max;
 263
 264         u32                             multicast_last_member_count;
 265         u32                             multicast_startup_query_count;
 266
 267         unsigned long                   multicast_last_member_interval;
 268         unsigned long                   multicast_membership_interval;
 269         unsigned long                   multicast_querier_interval;
 270         unsigned long                   multicast_query_interval;
 271         unsigned long                   multicast_query_response_interval;
 272         unsigned long                   multicast_startup_query_interval;
 273
 274         spinlock_t                      multicast_lock;
 275         struct net_bridge_mdb_htable __rcu *mdb;
 276         struct hlist_head               router_list;
 277
 278         struct timer_list               multicast_router_timer;
 279         struct bridge_mcast_other_query ip4_other_query;
 280         struct bridge_mcast_own_query   ip4_own_query;
 281         struct bridge_mcast_querier     ip4_querier;
 282 #if IS_ENABLED(CONFIG_IPV6)
 283         struct bridge_mcast_other_query ip6_other_query;
 284         struct bridge_mcast_own_query   ip6_own_query;
 285         struct bridge_mcast_querier     ip6_querier;
 286 #endif /* IS_ENABLED(CONFIG_IPV6) */
 287 #endif
 288
 289         struct timer_list               hello_timer;
 290         struct timer_list               tcn_timer;
 291         struct timer_list               topology_change_timer;
 292         struct timer_list               gc_timer;
 293         struct kobject                  *ifobj;
 294         u32                             auto_cnt;
 295 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 296         u8                              vlan_enabled;
 297         struct net_port_vlans __rcu     *vlan_info;
 298 #endif
 299 };
 300
 301 struct br_input_skb_cb {
 302         struct net_device *brdev;
 303 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 304         int igmp;
 305         int mrouters_only;
 306 #endif
 307 };
 308
 309 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 310
 311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 312 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 313 #else
 314 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 315 #endif
 316
 317 #define br_printk(level, br, format, args...)   \
 318         printk(level "%s: " format, (br)->dev->name, ##args)
 319
 320 #define br_err(__br, format, args...)                   \
 321         br_printk(KERN_ERR, __br, format, ##args)
 322 #define br_warn(__br, format, args...)                  \
 323         br_printk(KERN_WARNING, __br, format, ##args)
 324 #define br_notice(__br, format, args...)                \
 325         br_printk(KERN_NOTICE, __br, format, ##args)
 326 #define br_info(__br, format, args...)                  \
 327         br_printk(KERN_INFO, __br, format, ##args)
 328
 329 #define br_debug(br, format, args...)                   \
 330         pr_debug("%s: " format,  (br)->dev->name, ##args)
 331
 332 /* called under bridge lock */
 333 static inline int br_is_root_bridge(const struct net_bridge *br)
 334 {
 335         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 336 }
 337
 338 /* br_device.c */
 339 void br_dev_setup(struct net_device *dev);
 340 void br_dev_delete(struct net_device *dev, struct list_head *list);
 341 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 342 #ifdef CONFIG_NET_POLL_CONTROLLER
 343 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 344                                        struct sk_buff *skb)
 345 {
 346         struct netpoll *np = p->np;
 347
 348         if (np)
 349                 netpoll_send_skb(np, skb);
 350 }
 351
 352 int br_netpoll_enable(struct net_bridge_port *p);
 353 void br_netpoll_disable(struct net_bridge_port *p);
 354 #else
 355 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 356                                        struct sk_buff *skb)
 357 {
 358 }
 359
 360 static inline int br_netpoll_enable(struct net_bridge_port *p)
 361 {
 362         return 0;
 363 }
 364
 365 static inline void br_netpoll_disable(struct net_bridge_port *p)
 366 {
 367 }
 368 #endif
 369
 370 /* br_fdb.c */
 371 int br_fdb_init(void);
 372 void br_fdb_fini(void);
 373 void br_fdb_flush(struct net_bridge *br);
 374 void br_fdb_find_delete_local(struct net_bridge *br,
 375                               const struct net_bridge_port *p,
 376                               const unsigned char *addr, u16 vid);
 377 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 378 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 379 void br_fdb_cleanup(unsigned long arg);
 380 void br_fdb_delete_by_port(struct net_bridge *br,
 381                            const struct net_bridge_port *p, int do_all);
 382 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
 383                                           const unsigned char *addr, __u16 vid);
 384 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 385 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 386                    unsigned long off);
 387 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 388                   const unsigned char *addr, u16 vid);
 389 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 390                    const unsigned char *addr, u16 vid, bool added_by_user);
 391
 392 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 393                   struct net_device *dev, const unsigned char *addr);
 394 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 395                const unsigned char *addr, u16 nlh_flags);
 396 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 397                 struct net_device *dev, int idx);
 398 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 399 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 400
 401 /* br_forward.c */
 402 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
 403 int br_dev_queue_push_xmit(struct sk_buff *skb);
 404 void br_forward(const struct net_bridge_port *to,
 405                 struct sk_buff *skb, struct sk_buff *skb0);
 406 int br_forward_finish(struct sk_buff *skb);
 407 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
 408 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 409                       struct sk_buff *skb2, bool unicast);
 410
 411 /* br_if.c */
 412 void br_port_carrier_check(struct net_bridge_port *p);
 413 int br_add_bridge(struct net *net, const char *name);
 414 int br_del_bridge(struct net *net, const char *name);
 415 int br_add_if(struct net_bridge *br, struct net_device *dev);
 416 int br_del_if(struct net_bridge *br, struct net_device *dev);
 417 int br_min_mtu(const struct net_bridge *br);
 418 netdev_features_t br_features_recompute(struct net_bridge *br,
 419                                         netdev_features_t features);
 420 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 421 void br_manage_promisc(struct net_bridge *br);
 422
 423 /* br_input.c */
 424 int br_handle_frame_finish(struct sk_buff *skb);
 425 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 426
 427 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 428 {
 429         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 430 }
 431
 432 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 433 {
 434         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 435 }
 436
 437 /* br_ioctl.c */
 438 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 439 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 440                              void __user *arg);
 441
 442 /* br_multicast.c */
 443 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 444 extern unsigned int br_mdb_rehash_seq;
 445 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 446                      struct sk_buff *skb, u16 vid);
 447 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 448                                         struct sk_buff *skb, u16 vid);
 449 void br_multicast_add_port(struct net_bridge_port *port);
 450 void br_multicast_del_port(struct net_bridge_port *port);
 451 void br_multicast_enable_port(struct net_bridge_port *port);
 452 void br_multicast_disable_port(struct net_bridge_port *port);
 453 void br_multicast_init(struct net_bridge *br);
 454 void br_multicast_open(struct net_bridge *br);
 455 void br_multicast_stop(struct net_bridge *br);
 456 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 457                           struct sk_buff *skb);
 458 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 459                           struct sk_buff *skb, struct sk_buff *skb2);
 460 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 461 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 462 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 463 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 464 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 465 struct net_bridge_mdb_entry *
 466 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
 467 struct net_bridge_mdb_entry *
 468 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
 469                        struct br_ip *group);
 470 void br_multicast_free_pg(struct rcu_head *head);
 471 struct net_bridge_port_group *
 472 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 473                             struct net_bridge_port_group __rcu *next,
 474                             unsigned char state);
 475 void br_mdb_init(void);
 476 void br_mdb_uninit(void);
 477 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 478                    struct br_ip *group, int type);
 479
 480 #define mlock_dereference(X, br) \
 481         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 482
 483 static inline bool br_multicast_is_router(struct net_bridge *br)
 484 {
 485         return br->multicast_router == 2 ||
 486                (br->multicast_router == 1 &&
 487                 timer_pending(&br->multicast_router_timer));
 488 }
 489
 490 static inline bool
 491 __br_multicast_querier_exists(struct net_bridge *br,
 492                               struct bridge_mcast_other_query *querier)
 493 {
 494         return time_is_before_jiffies(querier->delay_time) &&
 495                (br->multicast_querier || timer_pending(&querier->timer));
 496 }
 497
 498 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 499                                                struct ethhdr *eth)
 500 {
 501         switch (eth->h_proto) {
 502         case (htons(ETH_P_IP)):
 503                 return __br_multicast_querier_exists(br, &br->ip4_other_query);
 504 #if IS_ENABLED(CONFIG_IPV6)
 505         case (htons(ETH_P_IPV6)):
 506                 return __br_multicast_querier_exists(br, &br->ip6_other_query);
 507 #endif
 508         default:
 509                 return false;
 510         }
 511 }
 512 #else
 513 static inline int br_multicast_rcv(struct net_bridge *br,
 514                                    struct net_bridge_port *port,
 515                                    struct sk_buff *skb,
 516                                    u16 vid)
 517 {
 518         return 0;
 519 }
 520
 521 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 522                                                       struct sk_buff *skb, u16 vid)
 523 {
 524         return NULL;
 525 }
 526
 527 static inline void br_multicast_add_port(struct net_bridge_port *port)
 528 {
 529 }
 530
 531 static inline void br_multicast_del_port(struct net_bridge_port *port)
 532 {
 533 }
 534
 535 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 536 {
 537 }
 538
 539 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 540 {
 541 }
 542
 543 static inline void br_multicast_init(struct net_bridge *br)
 544 {
 545 }
 546
 547 static inline void br_multicast_open(struct net_bridge *br)
 548 {
 549 }
 550
 551 static inline void br_multicast_stop(struct net_bridge *br)
 552 {
 553 }
 554
 555 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
 556                                         struct sk_buff *skb)
 557 {
 558 }
 559
 560 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
 561                                         struct sk_buff *skb,
 562                                         struct sk_buff *skb2)
 563 {
 564 }
 565 static inline bool br_multicast_is_router(struct net_bridge *br)
 566 {
 567         return 0;
 568 }
 569 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 570                                                struct ethhdr *eth)
 571 {
 572         return false;
 573 }
 574 static inline void br_mdb_init(void)
 575 {
 576 }
 577 static inline void br_mdb_uninit(void)
 578 {
 579 }
 580 #endif
 581
 582 /* br_vlan.c */
 583 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 584 bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
 585                         struct sk_buff *skb, u16 *vid);
 586 bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
 587                        const struct sk_buff *skb);
 588 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 589 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 590                                const struct net_port_vlans *v,
 591                                struct sk_buff *skb);
 592 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
 593 int br_vlan_delete(struct net_bridge *br, u16 vid);
 594 void br_vlan_flush(struct net_bridge *br);
 595 bool br_vlan_find(struct net_bridge *br, u16 vid);
 596 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 597 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
 598 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 599 void nbp_vlan_flush(struct net_bridge_port *port);
 600 bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
 601
 602 static inline struct net_port_vlans *br_get_vlan_info(
 603                                                 const struct net_bridge *br)
 604 {
 605         return rcu_dereference_rtnl(br->vlan_info);
 606 }
 607
 608 static inline struct net_port_vlans *nbp_get_vlan_info(
 609                                                 const struct net_bridge_port *p)
 610 {
 611         return rcu_dereference_rtnl(p->vlan_info);
 612 }
 613
 614 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 615  * skb, the vlan tag will always be present if the frame was tagged.
 616  */
 617 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 618 {
 619         int err = 0;
 620
 621         if (vlan_tx_tag_present(skb))
 622                 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
 623         else {
 624                 *vid = 0;
 625                 err = -EINVAL;
 626         }
 627
 628         return err;
 629 }
 630
 631 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 632 {
 633         /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
 634          * vid wasn't set
 635          */
 636         smp_rmb();
 637         return v->pvid ?: VLAN_N_VID;
 638 }
 639
 640 static inline int br_vlan_enabled(struct net_bridge *br)
 641 {
 642         return br->vlan_enabled;
 643 }
 644 #else
 645 static inline bool br_allowed_ingress(struct net_bridge *br,
 646                                       struct net_port_vlans *v,
 647                                       struct sk_buff *skb,
 648                                       u16 *vid)
 649 {
 650         return true;
 651 }
 652
 653 static inline bool br_allowed_egress(struct net_bridge *br,
 654                                      const struct net_port_vlans *v,
 655                                      const struct sk_buff *skb)
 656 {
 657         return true;
 658 }
 659
 660 static inline bool br_should_learn(struct net_bridge_port *p,
 661                                    struct sk_buff *skb, u16 *vid)
 662 {
 663         return true;
 664 }
 665
 666 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 667                                              const struct net_port_vlans *v,
 668                                              struct sk_buff *skb)
 669 {
 670         return skb;
 671 }
 672
 673 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
 674 {
 675         return -EOPNOTSUPP;
 676 }
 677
 678 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 679 {
 680         return -EOPNOTSUPP;
 681 }
 682
 683 static inline void br_vlan_flush(struct net_bridge *br)
 684 {
 685 }
 686
 687 static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
 688 {
 689         return false;
 690 }
 691
 692 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
 693 {
 694         return -EOPNOTSUPP;
 695 }
 696
 697 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
 698 {
 699         return -EOPNOTSUPP;
 700 }
 701
 702 static inline void nbp_vlan_flush(struct net_bridge_port *port)
 703 {
 704 }
 705
 706 static inline struct net_port_vlans *br_get_vlan_info(
 707                                                 const struct net_bridge *br)
 708 {
 709         return NULL;
 710 }
 711 static inline struct net_port_vlans *nbp_get_vlan_info(
 712                                                 const struct net_bridge_port *p)
 713 {
 714         return NULL;
 715 }
 716
 717 static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
 718 {
 719         return false;
 720 }
 721
 722 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
 723 {
 724         return 0;
 725 }
 726 static inline u16 br_get_pvid(const struct net_port_vlans *v)
 727 {
 728         return VLAN_N_VID;      /* Returns invalid vid */
 729 }
 730
 731 static inline int br_vlan_enabled(struct net_bridge *br)
 732 {
 733         return 0;
 734 }
 735 #endif
 736
 737 /* br_netfilter.c */
 738 #ifdef CONFIG_BRIDGE_NETFILTER
 739 int br_netfilter_init(void);
 740 void br_netfilter_fini(void);
 741 void br_netfilter_rtable_init(struct net_bridge *);
 742 #else
 743 #define br_netfilter_init()     (0)
 744 #define br_netfilter_fini()     do { } while (0)
 745 #define br_netfilter_rtable_init(x)
 746 #endif
 747
 748 /* br_stp.c */
 749 void br_log_state(const struct net_bridge_port *p);
 750 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
 751 void br_init_port(struct net_bridge_port *p);
 752 void br_become_designated_port(struct net_bridge_port *p);
 753
 754 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
 755 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
 756 int br_set_hello_time(struct net_bridge *br, unsigned long x);
 757 int br_set_max_age(struct net_bridge *br, unsigned long x);
 758
 759
 760 /* br_stp_if.c */
 761 void br_stp_enable_bridge(struct net_bridge *br);
 762 void br_stp_disable_bridge(struct net_bridge *br);
 763 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
 764 void br_stp_enable_port(struct net_bridge_port *p);
 765 void br_stp_disable_port(struct net_bridge_port *p);
 766 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
 767 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
 768 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
 769 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
 770 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
 771 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
 772
 773 /* br_stp_bpdu.c */
 774 struct stp_proto;
 775 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
 776                 struct net_device *dev);
 777
 778 /* br_stp_timer.c */
 779 void br_stp_timer_init(struct net_bridge *br);
 780 void br_stp_port_timer_init(struct net_bridge_port *p);
 781 unsigned long br_timer_value(const struct timer_list *timer);
 782
 783 /* br.c */
 784 #if IS_ENABLED(CONFIG_ATM_LANE)
 785 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
 786 #endif
 787
 788 /* br_netlink.c */
 789 extern struct rtnl_link_ops br_link_ops;
 790 int br_netlink_init(void);
 791 void br_netlink_fini(void);
 792 void br_ifinfo_notify(int event, struct net_bridge_port *port);
 793 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
 794 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
 795 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
 796                u32 filter_mask);
 797
 798 #ifdef CONFIG_SYSFS
 799 /* br_sysfs_if.c */
 800 extern const struct sysfs_ops brport_sysfs_ops;
 801 int br_sysfs_addif(struct net_bridge_port *p);
 802 int br_sysfs_renameif(struct net_bridge_port *p);
 803
 804 /* br_sysfs_br.c */
 805 int br_sysfs_addbr(struct net_device *dev);
 806 void br_sysfs_delbr(struct net_device *dev);
 807
 808 #else
 809
 810 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
 811 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
 812 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
 813 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
 814 #endif /* CONFIG_SYSFS */
 815
 816 #endif