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