net/bridge/br_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  */
   8
   9 #ifndef _BR_PRIVATE_H
  10 #define _BR_PRIVATE_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/if_bridge.h>
  14 #include <linux/netpoll.h>
  15 #include <linux/u64_stats_sync.h>
  16 #include <net/route.h>
  17 #include <net/ip6_fib.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/rhashtable.h>
  20 #include <linux/refcount.h>
  21
  22 #define BR_HASH_BITS 8
  23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25 #define BR_HOLD_TIME (1*HZ)
  26
  27 #define BR_PORT_BITS    10
  28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  29
  30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  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 of control protocols like STP, MAC PAUSE and LACP */
  37 enum {
  38         BR_GROUPFWD_STP         = BIT(0),
  39         BR_GROUPFWD_MACPAUSE    = BIT(1),
  40         BR_GROUPFWD_LACP        = BIT(2),
  41 };
  42
  43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  44                                 BR_GROUPFWD_LACP)
  45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  46 #define BR_GROUPFWD_8021AD      0xB801u
  47
  48 /* Path to usermode spanning tree program */
  49 #define BR_STP_PROG     "/sbin/bridge-stp"
  50
  51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  52
  53 typedef struct bridge_id bridge_id;
  54 typedef struct mac_addr mac_addr;
  55 typedef __u16 port_id;
  56
  57 struct bridge_id {
  58         unsigned char   prio[2];
  59         unsigned char   addr[ETH_ALEN];
  60 };
  61
  62 struct mac_addr {
  63         unsigned char   addr[ETH_ALEN];
  64 };
  65
  66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  67 /* our own querier */
  68 struct bridge_mcast_own_query {
  69         struct timer_list       timer;
  70         u32                     startup_sent;
  71 };
  72
  73 /* other querier */
  74 struct bridge_mcast_other_query {
  75         struct timer_list               timer;
  76         unsigned long                   delay_time;
  77 };
  78
  79 /* selected querier */
  80 struct bridge_mcast_querier {
  81         struct br_ip addr;
  82         struct net_bridge_port __rcu    *port;
  83 };
  84
  85 /* IGMP/MLD statistics */
  86 struct bridge_mcast_stats {
  87         struct br_mcast_stats mstats;
  88         struct u64_stats_sync syncp;
  89 };
  90 #endif
  91
  92 struct br_vlan_stats {
  93         u64 rx_bytes;
  94         u64 rx_packets;
  95         u64 tx_bytes;
  96         u64 tx_packets;
  97         struct u64_stats_sync syncp;
  98 };
  99
 100 struct br_tunnel_info {
 101         __be64                  tunnel_id;
 102         struct metadata_dst     *tunnel_dst;
 103 };
 104
 105 /* private vlan flags */
 106 enum {
 107         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 108         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 109 };
 110
 111 /**
 112  * struct net_bridge_vlan - per-vlan entry
 113  *
 114  * @vnode: rhashtable member
 115  * @vid: VLAN id
 116  * @flags: bridge vlan flags
 117  * @priv_flags: private (in-kernel) bridge vlan flags
 118  * @state: STP state (e.g. blocking, learning, forwarding)
 119  * @stats: per-cpu VLAN statistics
 120  * @br: if MASTER flag set, this points to a bridge struct
 121  * @port: if MASTER flag unset, this points to a port struct
 122  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 123  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 124  *          for this VLAN entry
 125  * @vlist: sorted list of VLAN entries
 126  * @rcu: used for entry destruction
 127  *
 128  * This structure is shared between the global per-VLAN entries contained in
 129  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 130  * the port's rhashtable. The union entries should be interpreted depending on
 131  * the entry flags that are set.
 132  */
 133 struct net_bridge_vlan {
 134         struct rhash_head               vnode;
 135         struct rhash_head               tnode;
 136         u16                             vid;
 137         u16                             flags;
 138         u16                             priv_flags;
 139         u8                              state;
 140         struct br_vlan_stats __percpu   *stats;
 141         union {
 142                 struct net_bridge       *br;
 143                 struct net_bridge_port  *port;
 144         };
 145         union {
 146                 refcount_t              refcnt;
 147                 struct net_bridge_vlan  *brvlan;
 148         };
 149
 150         struct br_tunnel_info           tinfo;
 151
 152         struct list_head                vlist;
 153
 154         struct rcu_head                 rcu;
 155 };
 156
 157 /**
 158  * struct net_bridge_vlan_group
 159  *
 160  * @vlan_hash: VLAN entry rhashtable
 161  * @vlan_list: sorted VLAN entry list
 162  * @num_vlans: number of total VLAN entries
 163  * @pvid: PVID VLAN id
 164  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 165  *
 166  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 167  *            primitives because the bridge can have entries in its list which
 168  *            are just for global context but not for filtering, i.e. they have
 169  *            the master flag set but not the brentry flag. If you have to check
 170  *            if there're "real" entries in the bridge please test @num_vlans
 171  */
 172 struct net_bridge_vlan_group {
 173         struct rhashtable               vlan_hash;
 174         struct rhashtable               tunnel_hash;
 175         struct list_head                vlan_list;
 176         u16                             num_vlans;
 177         u16                             pvid;
 178         u8                              pvid_state;
 179 };
 180
 181 /* bridge fdb flags */
 182 enum {
 183         BR_FDB_LOCAL,
 184         BR_FDB_STATIC,
 185         BR_FDB_STICKY,
 186         BR_FDB_ADDED_BY_USER,
 187         BR_FDB_ADDED_BY_EXT_LEARN,
 188         BR_FDB_OFFLOADED,
 189         BR_FDB_NOTIFY,
 190         BR_FDB_NOTIFY_INACTIVE
 191 };
 192
 193 struct net_bridge_fdb_key {
 194         mac_addr addr;
 195         u16 vlan_id;
 196 };
 197
 198 struct net_bridge_fdb_entry {
 199         struct rhash_head               rhnode;
 200         struct net_bridge_port          *dst;
 201
 202         struct net_bridge_fdb_key       key;
 203         struct hlist_node               fdb_node;
 204         unsigned long                   flags;
 205
 206         /* write-heavy members should not affect lookups */
 207         unsigned long                   updated ____cacheline_aligned_in_smp;
 208         unsigned long                   used;
 209
 210         struct rcu_head                 rcu;
 211 };
 212
 213 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 214 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 216 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 217 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 218
 219 #define PG_SRC_ENT_LIMIT        32
 220
 221 #define BR_SGRP_F_DELETE        BIT(0)
 222 #define BR_SGRP_F_SEND          BIT(1)
 223 #define BR_SGRP_F_INSTALLED     BIT(2)
 224
 225 struct net_bridge_mcast_gc {
 226         struct hlist_node               gc_node;
 227         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 228 };
 229
 230 struct net_bridge_group_src {
 231         struct hlist_node               node;
 232
 233         struct br_ip                    addr;
 234         struct net_bridge_port_group    *pg;
 235         u8                              flags;
 236         u8                              src_query_rexmit_cnt;
 237         struct timer_list               timer;
 238
 239         struct net_bridge               *br;
 240         struct net_bridge_mcast_gc      mcast_gc;
 241         struct rcu_head                 rcu;
 242 };
 243
 244 struct net_bridge_port_group_sg_key {
 245         struct net_bridge_port          *port;
 246         struct br_ip                    addr;
 247 };
 248
 249 struct net_bridge_port_group {
 250         struct net_bridge_port_group __rcu *next;
 251         struct net_bridge_port_group_sg_key key;
 252         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 253         unsigned char                   flags;
 254         unsigned char                   filter_mode;
 255         unsigned char                   grp_query_rexmit_cnt;
 256         unsigned char                   rt_protocol;
 257
 258         struct hlist_head               src_list;
 259         unsigned int                    src_ents;
 260         struct timer_list               timer;
 261         struct timer_list               rexmit_timer;
 262         struct hlist_node               mglist;
 263
 264         struct rhash_head               rhnode;
 265         struct net_bridge_mcast_gc      mcast_gc;
 266         struct rcu_head                 rcu;
 267 };
 268
 269 struct net_bridge_mdb_entry {
 270         struct rhash_head               rhnode;
 271         struct net_bridge               *br;
 272         struct net_bridge_port_group __rcu *ports;
 273         struct br_ip                    addr;
 274         bool                            host_joined;
 275
 276         struct timer_list               timer;
 277         struct hlist_node               mdb_node;
 278
 279         struct net_bridge_mcast_gc      mcast_gc;
 280         struct rcu_head                 rcu;
 281 };
 282
 283 struct net_bridge_port {
 284         struct net_bridge               *br;
 285         struct net_device               *dev;
 286         struct list_head                list;
 287
 288         unsigned long                   flags;
 289 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 290         struct net_bridge_vlan_group    __rcu *vlgrp;
 291 #endif
 292         struct net_bridge_port          __rcu *backup_port;
 293
 294         /* STP */
 295         u8                              priority;
 296         u8                              state;
 297         u16                             port_no;
 298         unsigned char                   topology_change_ack;
 299         unsigned char                   config_pending;
 300         port_id                         port_id;
 301         port_id                         designated_port;
 302         bridge_id                       designated_root;
 303         bridge_id                       designated_bridge;
 304         u32                             path_cost;
 305         u32                             designated_cost;
 306         unsigned long                   designated_age;
 307
 308         struct timer_list               forward_delay_timer;
 309         struct timer_list               hold_timer;
 310         struct timer_list               message_age_timer;
 311         struct kobject                  kobj;
 312         struct rcu_head                 rcu;
 313
 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 315         struct bridge_mcast_own_query   ip4_own_query;
 316 #if IS_ENABLED(CONFIG_IPV6)
 317         struct bridge_mcast_own_query   ip6_own_query;
 318 #endif /* IS_ENABLED(CONFIG_IPV6) */
 319         unsigned char                   multicast_router;
 320         struct bridge_mcast_stats       __percpu *mcast_stats;
 321         struct timer_list               multicast_router_timer;
 322         struct hlist_head               mglist;
 323         struct hlist_node               rlist;
 324 #endif
 325
 326 #ifdef CONFIG_SYSFS
 327         char                            sysfs_name[IFNAMSIZ];
 328 #endif
 329
 330 #ifdef CONFIG_NET_POLL_CONTROLLER
 331         struct netpoll                  *np;
 332 #endif
 333 #ifdef CONFIG_NET_SWITCHDEV
 334         int                             offload_fwd_mark;
 335 #endif
 336         u16                             group_fwd_mask;
 337         u16                             backup_redirected_cnt;
 338
 339         struct bridge_stp_xstats        stp_xstats;
 340 };
 341
 342 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 343
 344 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 345 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 346
 347 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 348 {
 349         return rcu_dereference(dev->rx_handler_data);
 350 }
 351
 352 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 353 {
 354         return netif_is_bridge_port(dev) ?
 355                 rtnl_dereference(dev->rx_handler_data) : NULL;
 356 }
 357
 358 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 359 {
 360         return netif_is_bridge_port(dev) ?
 361                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 362 }
 363
 364 enum net_bridge_opts {
 365         BROPT_VLAN_ENABLED,
 366         BROPT_VLAN_STATS_ENABLED,
 367         BROPT_NF_CALL_IPTABLES,
 368         BROPT_NF_CALL_IP6TABLES,
 369         BROPT_NF_CALL_ARPTABLES,
 370         BROPT_GROUP_ADDR_SET,
 371         BROPT_MULTICAST_ENABLED,
 372         BROPT_MULTICAST_QUERIER,
 373         BROPT_MULTICAST_QUERY_USE_IFADDR,
 374         BROPT_MULTICAST_STATS_ENABLED,
 375         BROPT_HAS_IPV6_ADDR,
 376         BROPT_NEIGH_SUPPRESS_ENABLED,
 377         BROPT_MTU_SET_BY_USER,
 378         BROPT_VLAN_STATS_PER_PORT,
 379         BROPT_NO_LL_LEARN,
 380         BROPT_VLAN_BRIDGE_BINDING,
 381 };
 382
 383 struct net_bridge {
 384         spinlock_t                      lock;
 385         spinlock_t                      hash_lock;
 386         struct list_head                port_list;
 387         struct net_device               *dev;
 388         struct pcpu_sw_netstats         __percpu *stats;
 389         unsigned long                   options;
 390         /* These fields are accessed on each packet */
 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 392         __be16                          vlan_proto;
 393         u16                             default_pvid;
 394         struct net_bridge_vlan_group    __rcu *vlgrp;
 395 #endif
 396
 397         struct rhashtable               fdb_hash_tbl;
 398 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 399         union {
 400                 struct rtable           fake_rtable;
 401                 struct rt6_info         fake_rt6_info;
 402         };
 403 #endif
 404         u16                             group_fwd_mask;
 405         u16                             group_fwd_mask_required;
 406
 407         /* STP */
 408         bridge_id                       designated_root;
 409         bridge_id                       bridge_id;
 410         unsigned char                   topology_change;
 411         unsigned char                   topology_change_detected;
 412         u16                             root_port;
 413         unsigned long                   max_age;
 414         unsigned long                   hello_time;
 415         unsigned long                   forward_delay;
 416         unsigned long                   ageing_time;
 417         unsigned long                   bridge_max_age;
 418         unsigned long                   bridge_hello_time;
 419         unsigned long                   bridge_forward_delay;
 420         unsigned long                   bridge_ageing_time;
 421         u32                             root_path_cost;
 422
 423         u8                              group_addr[ETH_ALEN];
 424
 425         enum {
 426                 BR_NO_STP,              /* no spanning tree */
 427                 BR_KERNEL_STP,          /* old STP in kernel */
 428                 BR_USER_STP,            /* new RSTP in userspace */
 429         } stp_enabled;
 430
 431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 432
 433         u32                             hash_max;
 434
 435         u32                             multicast_last_member_count;
 436         u32                             multicast_startup_query_count;
 437
 438         u8                              multicast_igmp_version;
 439         u8                              multicast_router;
 440 #if IS_ENABLED(CONFIG_IPV6)
 441         u8                              multicast_mld_version;
 442 #endif
 443         spinlock_t                      multicast_lock;
 444         unsigned long                   multicast_last_member_interval;
 445         unsigned long                   multicast_membership_interval;
 446         unsigned long                   multicast_querier_interval;
 447         unsigned long                   multicast_query_interval;
 448         unsigned long                   multicast_query_response_interval;
 449         unsigned long                   multicast_startup_query_interval;
 450
 451         struct rhashtable               mdb_hash_tbl;
 452         struct rhashtable               sg_port_tbl;
 453
 454         struct hlist_head               mcast_gc_list;
 455         struct hlist_head               mdb_list;
 456         struct hlist_head               router_list;
 457
 458         struct timer_list               multicast_router_timer;
 459         struct bridge_mcast_other_query ip4_other_query;
 460         struct bridge_mcast_own_query   ip4_own_query;
 461         struct bridge_mcast_querier     ip4_querier;
 462         struct bridge_mcast_stats       __percpu *mcast_stats;
 463 #if IS_ENABLED(CONFIG_IPV6)
 464         struct bridge_mcast_other_query ip6_other_query;
 465         struct bridge_mcast_own_query   ip6_own_query;
 466         struct bridge_mcast_querier     ip6_querier;
 467 #endif /* IS_ENABLED(CONFIG_IPV6) */
 468         struct work_struct              mcast_gc_work;
 469 #endif
 470
 471         struct timer_list               hello_timer;
 472         struct timer_list               tcn_timer;
 473         struct timer_list               topology_change_timer;
 474         struct delayed_work             gc_work;
 475         struct kobject                  *ifobj;
 476         u32                             auto_cnt;
 477
 478 #ifdef CONFIG_NET_SWITCHDEV
 479         int offload_fwd_mark;
 480 #endif
 481         struct hlist_head               fdb_list;
 482
 483 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 484         struct list_head                mrp_list;
 485 #endif
 486 };
 487
 488 struct br_input_skb_cb {
 489         struct net_device *brdev;
 490
 491         u16 frag_max_size;
 492 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 493         u8 igmp;
 494         u8 mrouters_only:1;
 495 #endif
 496         u8 proxyarp_replied:1;
 497         u8 src_port_isolated:1;
 498 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 499         u8 vlan_filtered:1;
 500 #endif
 501 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 502         u8 br_netfilter_broute:1;
 503 #endif
 504
 505 #ifdef CONFIG_NET_SWITCHDEV
 506         int offload_fwd_mark;
 507 #endif
 508 };
 509
 510 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 511
 512 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 513 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 514 #else
 515 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 516 #endif
 517
 518 #define br_printk(level, br, format, args...)   \
 519         printk(level "%s: " format, (br)->dev->name, ##args)
 520
 521 #define br_err(__br, format, args...)                   \
 522         br_printk(KERN_ERR, __br, format, ##args)
 523 #define br_warn(__br, format, args...)                  \
 524         br_printk(KERN_WARNING, __br, format, ##args)
 525 #define br_notice(__br, format, args...)                \
 526         br_printk(KERN_NOTICE, __br, format, ##args)
 527 #define br_info(__br, format, args...)                  \
 528         br_printk(KERN_INFO, __br, format, ##args)
 529
 530 #define br_debug(br, format, args...)                   \
 531         pr_debug("%s: " format,  (br)->dev->name, ##args)
 532
 533 /* called under bridge lock */
 534 static inline int br_is_root_bridge(const struct net_bridge *br)
 535 {
 536         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 537 }
 538
 539 /* check if a VLAN entry is global */
 540 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 541 {
 542         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 543 }
 544
 545 /* check if a VLAN entry is used by the bridge */
 546 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 547 {
 548         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 549 }
 550
 551 /* check if we should use the vlan entry, returns false if it's only context */
 552 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 553 {
 554         if (br_vlan_is_master(v)) {
 555                 if (br_vlan_is_brentry(v))
 556                         return true;
 557                 else
 558                         return false;
 559         }
 560
 561         return true;
 562 }
 563
 564 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 565 {
 566         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 567 }
 568
 569 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 570 {
 571         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 572
 573         if (!ret)
 574                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 575
 576         return ret;
 577 }
 578
 579 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 580                                        const struct bridge_vlan_info *last,
 581                                        struct netlink_ext_ack *extack)
 582 {
 583         /* pvid flag is not allowed in ranges */
 584         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 585                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 586                 return false;
 587         }
 588
 589         /* when cur is the range end, check if:
 590          *  - it has range start flag
 591          *  - range ids are invalid (end is equal to or before start)
 592          */
 593         if (last) {
 594                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 595                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 596                         return false;
 597                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 598                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 599                         return false;
 600                 } else if (cur->vid <= last->vid) {
 601                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 602                         return false;
 603                 }
 604         }
 605
 606         /* check for required range flags */
 607         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 608                             BRIDGE_VLAN_INFO_RANGE_END))) {
 609                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 610                 return false;
 611         }
 612
 613         return true;
 614 }
 615
 616 static inline int br_afspec_cmd_to_rtm(int cmd)
 617 {
 618         switch (cmd) {
 619         case RTM_SETLINK:
 620                 return RTM_NEWVLAN;
 621         case RTM_DELLINK:
 622                 return RTM_DELVLAN;
 623         }
 624
 625         return 0;
 626 }
 627
 628 static inline int br_opt_get(const struct net_bridge *br,
 629                              enum net_bridge_opts opt)
 630 {
 631         return test_bit(opt, &br->options);
 632 }
 633
 634 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 635                       struct netlink_ext_ack *extack);
 636 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 637 int br_boolopt_multi_toggle(struct net_bridge *br,
 638                             struct br_boolopt_multi *bm,
 639                             struct netlink_ext_ack *extack);
 640 void br_boolopt_multi_get(const struct net_bridge *br,
 641                           struct br_boolopt_multi *bm);
 642 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 643
 644 /* br_device.c */
 645 void br_dev_setup(struct net_device *dev);
 646 void br_dev_delete(struct net_device *dev, struct list_head *list);
 647 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 648 #ifdef CONFIG_NET_POLL_CONTROLLER
 649 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 650                                        struct sk_buff *skb)
 651 {
 652         netpoll_send_skb(p->np, skb);
 653 }
 654
 655 int br_netpoll_enable(struct net_bridge_port *p);
 656 void br_netpoll_disable(struct net_bridge_port *p);
 657 #else
 658 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 659                                        struct sk_buff *skb)
 660 {
 661 }
 662
 663 static inline int br_netpoll_enable(struct net_bridge_port *p)
 664 {
 665         return 0;
 666 }
 667
 668 static inline void br_netpoll_disable(struct net_bridge_port *p)
 669 {
 670 }
 671 #endif
 672
 673 /* br_fdb.c */
 674 int br_fdb_init(void);
 675 void br_fdb_fini(void);
 676 int br_fdb_hash_init(struct net_bridge *br);
 677 void br_fdb_hash_fini(struct net_bridge *br);
 678 void br_fdb_flush(struct net_bridge *br);
 679 void br_fdb_find_delete_local(struct net_bridge *br,
 680                               const struct net_bridge_port *p,
 681                               const unsigned char *addr, u16 vid);
 682 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 683 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 684 void br_fdb_cleanup(struct work_struct *work);
 685 void br_fdb_delete_by_port(struct net_bridge *br,
 686                            const struct net_bridge_port *p, u16 vid, int do_all);
 687 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 688                                              const unsigned char *addr,
 689                                              __u16 vid);
 690 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 691 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 692                    unsigned long off);
 693 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 694                   const unsigned char *addr, u16 vid);
 695 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 696                    const unsigned char *addr, u16 vid, unsigned long flags);
 697
 698 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 699                   struct net_device *dev, const unsigned char *addr, u16 vid);
 700 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 701                const unsigned char *addr, u16 vid, u16 nlh_flags,
 702                struct netlink_ext_ack *extack);
 703 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 704                 struct net_device *dev, struct net_device *fdev, int *idx);
 705 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 706                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 707                struct netlink_ext_ack *extack);
 708 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 709 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 710 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 711                               const unsigned char *addr, u16 vid,
 712                               bool swdev_notify);
 713 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 714                               const unsigned char *addr, u16 vid,
 715                               bool swdev_notify);
 716 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 717                           const unsigned char *addr, u16 vid, bool offloaded);
 718
 719 /* br_forward.c */
 720 enum br_pkt_type {
 721         BR_PKT_UNICAST,
 722         BR_PKT_MULTICAST,
 723         BR_PKT_BROADCAST
 724 };
 725 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 726 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 727                 bool local_rcv, bool local_orig);
 728 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 729 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 730               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 731
 732 /* return true if both source port and dest port are isolated */
 733 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 734                                    const struct sk_buff *skb)
 735 {
 736         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 737                (to->flags & BR_ISOLATED);
 738 }
 739
 740 /* br_if.c */
 741 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 742 int br_add_bridge(struct net *net, const char *name);
 743 int br_del_bridge(struct net *net, const char *name);
 744 int br_add_if(struct net_bridge *br, struct net_device *dev,
 745               struct netlink_ext_ack *extack);
 746 int br_del_if(struct net_bridge *br, struct net_device *dev);
 747 void br_mtu_auto_adjust(struct net_bridge *br);
 748 netdev_features_t br_features_recompute(struct net_bridge *br,
 749                                         netdev_features_t features);
 750 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 751 void br_manage_promisc(struct net_bridge *br);
 752 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 753
 754 /* br_input.c */
 755 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 756 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 757
 758 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 759 {
 760         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 761 }
 762
 763 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 764 {
 765         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 766 }
 767
 768 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 769 {
 770         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 771 }
 772
 773 static inline struct net_bridge_port *
 774 br_port_get_check_rtnl(const struct net_device *dev)
 775 {
 776         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 777 }
 778
 779 /* br_ioctl.c */
 780 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 781 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 782                              void __user *arg);
 783
 784 /* br_multicast.c */
 785 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 786 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 787                      struct sk_buff *skb, u16 vid);
 788 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 789                                         struct sk_buff *skb, u16 vid);
 790 int br_multicast_add_port(struct net_bridge_port *port);
 791 void br_multicast_del_port(struct net_bridge_port *port);
 792 void br_multicast_enable_port(struct net_bridge_port *port);
 793 void br_multicast_disable_port(struct net_bridge_port *port);
 794 void br_multicast_init(struct net_bridge *br);
 795 void br_multicast_join_snoopers(struct net_bridge *br);
 796 void br_multicast_leave_snoopers(struct net_bridge *br);
 797 void br_multicast_open(struct net_bridge *br);
 798 void br_multicast_stop(struct net_bridge *br);
 799 void br_multicast_dev_del(struct net_bridge *br);
 800 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 801                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 802 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 803 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 804 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 805 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 806 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 807 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 808 #if IS_ENABLED(CONFIG_IPV6)
 809 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 810 #endif
 811 struct net_bridge_mdb_entry *
 812 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 813 struct net_bridge_mdb_entry *
 814 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 815 struct net_bridge_port_group *
 816 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 817                             struct net_bridge_port_group __rcu *next,
 818                             unsigned char flags, const unsigned char *src,
 819                             u8 filter_mode, u8 rt_protocol);
 820 int br_mdb_hash_init(struct net_bridge *br);
 821 void br_mdb_hash_fini(struct net_bridge *br);
 822 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 823                    struct net_bridge_port_group *pg, int type);
 824 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 825                    int type);
 826 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 827                          struct net_bridge_port_group *pg,
 828                          struct net_bridge_port_group __rcu **pp);
 829 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 830                         const struct sk_buff *skb, u8 type, u8 dir);
 831 int br_multicast_init_stats(struct net_bridge *br);
 832 void br_multicast_uninit_stats(struct net_bridge *br);
 833 void br_multicast_get_stats(const struct net_bridge *br,
 834                             const struct net_bridge_port *p,
 835                             struct br_mcast_stats *dest);
 836 void br_mdb_init(void);
 837 void br_mdb_uninit(void);
 838 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 839 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 840 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 841                                      u8 filter_mode);
 842 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 843                                        struct net_bridge_port_group *sg);
 844
 845 #define mlock_dereference(X, br) \
 846         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 847
 848 static inline bool br_multicast_is_router(struct net_bridge *br)
 849 {
 850         return br->multicast_router == 2 ||
 851                (br->multicast_router == 1 &&
 852                 timer_pending(&br->multicast_router_timer));
 853 }
 854
 855 static inline bool
 856 __br_multicast_querier_exists(struct net_bridge *br,
 857                                 struct bridge_mcast_other_query *querier,
 858                                 const bool is_ipv6)
 859 {
 860         bool own_querier_enabled;
 861
 862         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 863                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 864                         own_querier_enabled = false;
 865                 else
 866                         own_querier_enabled = true;
 867         } else {
 868                 own_querier_enabled = false;
 869         }
 870
 871         return time_is_before_jiffies(querier->delay_time) &&
 872                (own_querier_enabled || timer_pending(&querier->timer));
 873 }
 874
 875 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 876                                                struct ethhdr *eth)
 877 {
 878         switch (eth->h_proto) {
 879         case (htons(ETH_P_IP)):
 880                 return __br_multicast_querier_exists(br,
 881                         &br->ip4_other_query, false);
 882 #if IS_ENABLED(CONFIG_IPV6)
 883         case (htons(ETH_P_IPV6)):
 884                 return __br_multicast_querier_exists(br,
 885                         &br->ip6_other_query, true);
 886 #endif
 887         default:
 888                 return false;
 889         }
 890 }
 891
 892 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
 893 {
 894         switch (ip->proto) {
 895         case htons(ETH_P_IP):
 896                 return ipv4_is_zeronet(ip->src.ip4);
 897 #if IS_ENABLED(CONFIG_IPV6)
 898         case htons(ETH_P_IPV6):
 899                 return ipv6_addr_any(&ip->src.ip6);
 900 #endif
 901         default:
 902                 return false;
 903         }
 904 }
 905
 906 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
 907                                                    __be16 proto)
 908 {
 909         switch (proto) {
 910         case htons(ETH_P_IP):
 911                 return !!(br->multicast_igmp_version == 3);
 912 #if IS_ENABLED(CONFIG_IPV6)
 913         case htons(ETH_P_IPV6):
 914                 return !!(br->multicast_mld_version == 2);
 915 #endif
 916         default:
 917                 return false;
 918         }
 919 }
 920
 921 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 922 {
 923         return BR_INPUT_SKB_CB(skb)->igmp;
 924 }
 925
 926 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
 927 {
 928         return br->multicast_last_member_interval *
 929                br->multicast_last_member_count;
 930 }
 931
 932 static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
 933 {
 934         /* use the RFC default of 2 for QRV */
 935         return 2 * br->multicast_query_interval +
 936                br->multicast_query_response_interval;
 937 }
 938 #else
 939 static inline int br_multicast_rcv(struct net_bridge *br,
 940                                    struct net_bridge_port *port,
 941                                    struct sk_buff *skb,
 942                                    u16 vid)
 943 {
 944         return 0;
 945 }
 946
 947 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 948                                                       struct sk_buff *skb, u16 vid)
 949 {
 950         return NULL;
 951 }
 952
 953 static inline int br_multicast_add_port(struct net_bridge_port *port)
 954 {
 955         return 0;
 956 }
 957
 958 static inline void br_multicast_del_port(struct net_bridge_port *port)
 959 {
 960 }
 961
 962 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 963 {
 964 }
 965
 966 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 967 {
 968 }
 969
 970 static inline void br_multicast_init(struct net_bridge *br)
 971 {
 972 }
 973
 974 static inline void br_multicast_join_snoopers(struct net_bridge *br)
 975 {
 976 }
 977
 978 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
 979 {
 980 }
 981
 982 static inline void br_multicast_open(struct net_bridge *br)
 983 {
 984 }
 985
 986 static inline void br_multicast_stop(struct net_bridge *br)
 987 {
 988 }
 989
 990 static inline void br_multicast_dev_del(struct net_bridge *br)
 991 {
 992 }
 993
 994 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 995                                       struct sk_buff *skb,
 996                                       bool local_rcv, bool local_orig)
 997 {
 998 }
 999
1000 static inline bool br_multicast_is_router(struct net_bridge *br)
1001 {
1002         return false;
1003 }
1004
1005 static inline bool br_multicast_querier_exists(struct net_bridge *br,
1006                                                struct ethhdr *eth)
1007 {
1008         return false;
1009 }
1010
1011 static inline void br_mdb_init(void)
1012 {
1013 }
1014
1015 static inline void br_mdb_uninit(void)
1016 {
1017 }
1018
1019 static inline int br_mdb_hash_init(struct net_bridge *br)
1020 {
1021         return 0;
1022 }
1023
1024 static inline void br_mdb_hash_fini(struct net_bridge *br)
1025 {
1026 }
1027
1028 static inline void br_multicast_count(struct net_bridge *br,
1029                                       const struct net_bridge_port *p,
1030                                       const struct sk_buff *skb,
1031                                       u8 type, u8 dir)
1032 {
1033 }
1034
1035 static inline int br_multicast_init_stats(struct net_bridge *br)
1036 {
1037         return 0;
1038 }
1039
1040 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1041 {
1042 }
1043
1044 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1045 {
1046         return 0;
1047 }
1048 #endif
1049
1050 /* br_vlan.c */
1051 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1052 bool br_allowed_ingress(const struct net_bridge *br,
1053                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1054                         u16 *vid, u8 *state);
1055 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1056                        const struct sk_buff *skb);
1057 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1058 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1059                                const struct net_bridge_port *port,
1060                                struct net_bridge_vlan_group *vg,
1061                                struct sk_buff *skb);
1062 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1063                 bool *changed, struct netlink_ext_ack *extack);
1064 int br_vlan_delete(struct net_bridge *br, u16 vid);
1065 void br_vlan_flush(struct net_bridge *br);
1066 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1067 void br_recalculate_fwd_mask(struct net_bridge *br);
1068 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1069 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1070 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
1071 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
1072 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1073 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1074 int br_vlan_init(struct net_bridge *br);
1075 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
1076 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1077                                struct netlink_ext_ack *extack);
1078 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1079                  bool *changed, struct netlink_ext_ack *extack);
1080 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1081 void nbp_vlan_flush(struct net_bridge_port *port);
1082 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1083 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1084 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1085                        struct br_vlan_stats *stats);
1086 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1087 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1088                          void *ptr);
1089 void br_vlan_rtnl_init(void);
1090 void br_vlan_rtnl_uninit(void);
1091 void br_vlan_notify(const struct net_bridge *br,
1092                     const struct net_bridge_port *p,
1093                     u16 vid, u16 vid_range,
1094                     int cmd);
1095 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1096                              const struct net_bridge_vlan *range_end);
1097
1098 static inline struct net_bridge_vlan_group *br_vlan_group(
1099                                         const struct net_bridge *br)
1100 {
1101         return rtnl_dereference(br->vlgrp);
1102 }
1103
1104 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1105                                         const struct net_bridge_port *p)
1106 {
1107         return rtnl_dereference(p->vlgrp);
1108 }
1109
1110 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1111                                         const struct net_bridge *br)
1112 {
1113         return rcu_dereference(br->vlgrp);
1114 }
1115
1116 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1117                                         const struct net_bridge_port *p)
1118 {
1119         return rcu_dereference(p->vlgrp);
1120 }
1121
1122 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1123  * skb, the vlan tag will always be present if the frame was tagged.
1124  */
1125 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1126 {
1127         int err = 0;
1128
1129         if (skb_vlan_tag_present(skb)) {
1130                 *vid = skb_vlan_tag_get_id(skb);
1131         } else {
1132                 *vid = 0;
1133                 err = -EINVAL;
1134         }
1135
1136         return err;
1137 }
1138
1139 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1140 {
1141         if (!vg)
1142                 return 0;
1143
1144         smp_rmb();
1145         return vg->pvid;
1146 }
1147
1148 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1149 {
1150         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1151 }
1152 #else
1153 static inline bool br_allowed_ingress(const struct net_bridge *br,
1154                                       struct net_bridge_vlan_group *vg,
1155                                       struct sk_buff *skb,
1156                                       u16 *vid, u8 *state)
1157 {
1158         return true;
1159 }
1160
1161 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1162                                      const struct sk_buff *skb)
1163 {
1164         return true;
1165 }
1166
1167 static inline bool br_should_learn(struct net_bridge_port *p,
1168                                    struct sk_buff *skb, u16 *vid)
1169 {
1170         return true;
1171 }
1172
1173 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1174                                              const struct net_bridge_port *port,
1175                                              struct net_bridge_vlan_group *vg,
1176                                              struct sk_buff *skb)
1177 {
1178         return skb;
1179 }
1180
1181 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1182                               bool *changed, struct netlink_ext_ack *extack)
1183 {
1184         *changed = false;
1185         return -EOPNOTSUPP;
1186 }
1187
1188 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1189 {
1190         return -EOPNOTSUPP;
1191 }
1192
1193 static inline void br_vlan_flush(struct net_bridge *br)
1194 {
1195 }
1196
1197 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1198 {
1199 }
1200
1201 static inline int br_vlan_init(struct net_bridge *br)
1202 {
1203         return 0;
1204 }
1205
1206 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1207                                bool *changed, struct netlink_ext_ack *extack)
1208 {
1209         *changed = false;
1210         return -EOPNOTSUPP;
1211 }
1212
1213 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1214 {
1215         return -EOPNOTSUPP;
1216 }
1217
1218 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1219 {
1220 }
1221
1222 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1223                                                    u16 vid)
1224 {
1225         return NULL;
1226 }
1227
1228 static inline int nbp_vlan_init(struct net_bridge_port *port,
1229                                 struct netlink_ext_ack *extack)
1230 {
1231         return 0;
1232 }
1233
1234 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1235 {
1236         return 0;
1237 }
1238
1239 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1240 {
1241         return 0;
1242 }
1243
1244 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1245                                           unsigned long val)
1246 {
1247         return -EOPNOTSUPP;
1248 }
1249
1250 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1251                                          u32 filter_mask)
1252 {
1253         return 0;
1254 }
1255
1256 static inline struct net_bridge_vlan_group *br_vlan_group(
1257                                         const struct net_bridge *br)
1258 {
1259         return NULL;
1260 }
1261
1262 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1263                                         const struct net_bridge_port *p)
1264 {
1265         return NULL;
1266 }
1267
1268 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1269                                         const struct net_bridge *br)
1270 {
1271         return NULL;
1272 }
1273
1274 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1275                                         const struct net_bridge_port *p)
1276 {
1277         return NULL;
1278 }
1279
1280 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1281                                      struct br_vlan_stats *stats)
1282 {
1283 }
1284
1285 static inline void br_vlan_port_event(struct net_bridge_port *p,
1286                                       unsigned long event)
1287 {
1288 }
1289
1290 static inline int br_vlan_bridge_event(struct net_device *dev,
1291                                        unsigned long event, void *ptr)
1292 {
1293         return 0;
1294 }
1295
1296 static inline void br_vlan_rtnl_init(void)
1297 {
1298 }
1299
1300 static inline void br_vlan_rtnl_uninit(void)
1301 {
1302 }
1303
1304 static inline void br_vlan_notify(const struct net_bridge *br,
1305                                   const struct net_bridge_port *p,
1306                                   u16 vid, u16 vid_range,
1307                                   int cmd)
1308 {
1309 }
1310
1311 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1312                                            const struct net_bridge_vlan *range_end)
1313 {
1314         return true;
1315 }
1316 #endif
1317
1318 /* br_vlan_options.c */
1319 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1320 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1321                            const struct net_bridge_vlan *range_end);
1322 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1323 size_t br_vlan_opts_nl_size(void);
1324 int br_vlan_process_options(const struct net_bridge *br,
1325                             const struct net_bridge_port *p,
1326                             struct net_bridge_vlan *range_start,
1327                             struct net_bridge_vlan *range_end,
1328                             struct nlattr **tb,
1329                             struct netlink_ext_ack *extack);
1330
1331 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1332 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1333 {
1334         return READ_ONCE(v->state);
1335 }
1336
1337 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1338 {
1339         WRITE_ONCE(v->state, state);
1340 }
1341
1342 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1343 {
1344         return READ_ONCE(vg->pvid_state);
1345 }
1346
1347 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1348                                           u8 state)
1349 {
1350         WRITE_ONCE(vg->pvid_state, state);
1351 }
1352
1353 /* learn_allow is true at ingress and false at egress */
1354 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1355 {
1356         switch (state) {
1357         case BR_STATE_LEARNING:
1358                 return learn_allow;
1359         case BR_STATE_FORWARDING:
1360                 return true;
1361         default:
1362                 return false;
1363         }
1364 }
1365 #endif
1366
1367 struct nf_br_ops {
1368         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1369 };
1370 extern const struct nf_br_ops __rcu *nf_br_ops;
1371
1372 /* br_netfilter.c */
1373 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1374 int br_nf_core_init(void);
1375 void br_nf_core_fini(void);
1376 void br_netfilter_rtable_init(struct net_bridge *);
1377 #else
1378 static inline int br_nf_core_init(void) { return 0; }
1379 static inline void br_nf_core_fini(void) {}
1380 #define br_netfilter_rtable_init(x)
1381 #endif
1382
1383 /* br_stp.c */
1384 void br_set_state(struct net_bridge_port *p, unsigned int state);
1385 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1386 void br_init_port(struct net_bridge_port *p);
1387 void br_become_designated_port(struct net_bridge_port *p);
1388
1389 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1390 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1391 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1392 int br_set_max_age(struct net_bridge *br, unsigned long x);
1393 int __set_ageing_time(struct net_device *dev, unsigned long t);
1394 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1395
1396
1397 /* br_stp_if.c */
1398 void br_stp_enable_bridge(struct net_bridge *br);
1399 void br_stp_disable_bridge(struct net_bridge *br);
1400 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1401                        struct netlink_ext_ack *extack);
1402 void br_stp_enable_port(struct net_bridge_port *p);
1403 void br_stp_disable_port(struct net_bridge_port *p);
1404 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1405 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1406 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1407 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1408 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1409 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1410
1411 /* br_stp_bpdu.c */
1412 struct stp_proto;
1413 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1414                 struct net_device *dev);
1415
1416 /* br_stp_timer.c */
1417 void br_stp_timer_init(struct net_bridge *br);
1418 void br_stp_port_timer_init(struct net_bridge_port *p);
1419 unsigned long br_timer_value(const struct timer_list *timer);
1420
1421 /* br.c */
1422 #if IS_ENABLED(CONFIG_ATM_LANE)
1423 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1424 #endif
1425
1426 /* br_mrp.c */
1427 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1428 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1429                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1430 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb);
1431 bool br_mrp_enabled(struct net_bridge *br);
1432 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1433 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1434 #else
1435 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1436                                struct nlattr *attr, int cmd,
1437                                struct netlink_ext_ack *extack)
1438 {
1439         return -EOPNOTSUPP;
1440 }
1441
1442 static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
1443 {
1444         return 0;
1445 }
1446
1447 static inline bool br_mrp_enabled(struct net_bridge *br)
1448 {
1449         return false;
1450 }
1451
1452 static inline void br_mrp_port_del(struct net_bridge *br,
1453                                    struct net_bridge_port *p)
1454 {
1455 }
1456
1457 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1458 {
1459         return 0;
1460 }
1461
1462 #endif
1463
1464 /* br_netlink.c */
1465 extern struct rtnl_link_ops br_link_ops;
1466 int br_netlink_init(void);
1467 void br_netlink_fini(void);
1468 void br_ifinfo_notify(int event, const struct net_bridge *br,
1469                       const struct net_bridge_port *port);
1470 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1471                struct netlink_ext_ack *extack);
1472 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1473 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1474                u32 filter_mask, int nlflags);
1475 int br_process_vlan_info(struct net_bridge *br,
1476                          struct net_bridge_port *p, int cmd,
1477                          struct bridge_vlan_info *vinfo_curr,
1478                          struct bridge_vlan_info **vinfo_last,
1479                          bool *changed,
1480                          struct netlink_ext_ack *extack);
1481
1482 #ifdef CONFIG_SYSFS
1483 /* br_sysfs_if.c */
1484 extern const struct sysfs_ops brport_sysfs_ops;
1485 int br_sysfs_addif(struct net_bridge_port *p);
1486 int br_sysfs_renameif(struct net_bridge_port *p);
1487
1488 /* br_sysfs_br.c */
1489 int br_sysfs_addbr(struct net_device *dev);
1490 void br_sysfs_delbr(struct net_device *dev);
1491
1492 #else
1493
1494 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1495 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1496 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1497 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1498 #endif /* CONFIG_SYSFS */
1499
1500 /* br_switchdev.c */
1501 #ifdef CONFIG_NET_SWITCHDEV
1502 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1503 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1504                               struct sk_buff *skb);
1505 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1506                                   const struct sk_buff *skb);
1507 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1508                                unsigned long flags,
1509                                unsigned long mask);
1510 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1511                              int type);
1512 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1513                                struct netlink_ext_ack *extack);
1514 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1515
1516 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1517 {
1518         skb->offload_fwd_mark = 0;
1519 }
1520 #else
1521 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1522 {
1523         return 0;
1524 }
1525
1526 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1527                                             struct sk_buff *skb)
1528 {
1529 }
1530
1531 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1532                                                 const struct sk_buff *skb)
1533 {
1534         return true;
1535 }
1536
1537 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1538                                              unsigned long flags,
1539                                              unsigned long mask)
1540 {
1541         return 0;
1542 }
1543
1544 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1545                                              u16 vid, u16 flags,
1546                                              struct netlink_ext_ack *extack)
1547 {
1548         return -EOPNOTSUPP;
1549 }
1550
1551 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1552 {
1553         return -EOPNOTSUPP;
1554 }
1555
1556 static inline void
1557 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1558 {
1559 }
1560
1561 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1562 {
1563 }
1564 #endif /* CONFIG_NET_SWITCHDEV */
1565
1566 /* br_arp_nd_proxy.c */
1567 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1568 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1569                               u16 vid, struct net_bridge_port *p);
1570 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1571                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1572 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1573 #endif