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
 217 struct net_bridge_port_group {
 218         struct net_bridge_port          *port;
 219         struct net_bridge_port_group __rcu *next;
 220         struct hlist_node               mglist;
 221         struct rcu_head                 rcu;
 222         struct timer_list               timer;
 223         struct br_ip                    addr;
 224         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 225         unsigned char                   flags;
 226 };
 227
 228 struct net_bridge_mdb_entry {
 229         struct rhash_head               rhnode;
 230         struct net_bridge               *br;
 231         struct net_bridge_port_group __rcu *ports;
 232         struct rcu_head                 rcu;
 233         struct timer_list               timer;
 234         struct br_ip                    addr;
 235         bool                            host_joined;
 236         struct hlist_node               mdb_node;
 237 };
 238
 239 struct net_bridge_port {
 240         struct net_bridge               *br;
 241         struct net_device               *dev;
 242         struct list_head                list;
 243
 244         unsigned long                   flags;
 245 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 246         struct net_bridge_vlan_group    __rcu *vlgrp;
 247 #endif
 248         struct net_bridge_port          __rcu *backup_port;
 249
 250         /* STP */
 251         u8                              priority;
 252         u8                              state;
 253         u16                             port_no;
 254         unsigned char                   topology_change_ack;
 255         unsigned char                   config_pending;
 256         port_id                         port_id;
 257         port_id                         designated_port;
 258         bridge_id                       designated_root;
 259         bridge_id                       designated_bridge;
 260         u32                             path_cost;
 261         u32                             designated_cost;
 262         unsigned long                   designated_age;
 263
 264         struct timer_list               forward_delay_timer;
 265         struct timer_list               hold_timer;
 266         struct timer_list               message_age_timer;
 267         struct kobject                  kobj;
 268         struct rcu_head                 rcu;
 269
 270 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 271         struct bridge_mcast_own_query   ip4_own_query;
 272 #if IS_ENABLED(CONFIG_IPV6)
 273         struct bridge_mcast_own_query   ip6_own_query;
 274 #endif /* IS_ENABLED(CONFIG_IPV6) */
 275         unsigned char                   multicast_router;
 276         struct bridge_mcast_stats       __percpu *mcast_stats;
 277         struct timer_list               multicast_router_timer;
 278         struct hlist_head               mglist;
 279         struct hlist_node               rlist;
 280 #endif
 281
 282 #ifdef CONFIG_SYSFS
 283         char                            sysfs_name[IFNAMSIZ];
 284 #endif
 285
 286 #ifdef CONFIG_NET_POLL_CONTROLLER
 287         struct netpoll                  *np;
 288 #endif
 289 #ifdef CONFIG_NET_SWITCHDEV
 290         int                             offload_fwd_mark;
 291 #endif
 292         u16                             group_fwd_mask;
 293         u16                             backup_redirected_cnt;
 294
 295         struct bridge_stp_xstats        stp_xstats;
 296 };
 297
 298 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 299
 300 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 301 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 302
 303 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 304 {
 305         return rcu_dereference(dev->rx_handler_data);
 306 }
 307
 308 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 309 {
 310         return netif_is_bridge_port(dev) ?
 311                 rtnl_dereference(dev->rx_handler_data) : NULL;
 312 }
 313
 314 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 315 {
 316         return netif_is_bridge_port(dev) ?
 317                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 318 }
 319
 320 enum net_bridge_opts {
 321         BROPT_VLAN_ENABLED,
 322         BROPT_VLAN_STATS_ENABLED,
 323         BROPT_NF_CALL_IPTABLES,
 324         BROPT_NF_CALL_IP6TABLES,
 325         BROPT_NF_CALL_ARPTABLES,
 326         BROPT_GROUP_ADDR_SET,
 327         BROPT_MULTICAST_ENABLED,
 328         BROPT_MULTICAST_QUERIER,
 329         BROPT_MULTICAST_QUERY_USE_IFADDR,
 330         BROPT_MULTICAST_STATS_ENABLED,
 331         BROPT_HAS_IPV6_ADDR,
 332         BROPT_NEIGH_SUPPRESS_ENABLED,
 333         BROPT_MTU_SET_BY_USER,
 334         BROPT_VLAN_STATS_PER_PORT,
 335         BROPT_NO_LL_LEARN,
 336         BROPT_VLAN_BRIDGE_BINDING,
 337 };
 338
 339 struct net_bridge {
 340         spinlock_t                      lock;
 341         spinlock_t                      hash_lock;
 342         struct list_head                port_list;
 343         struct net_device               *dev;
 344         struct pcpu_sw_netstats         __percpu *stats;
 345         unsigned long                   options;
 346         /* These fields are accessed on each packet */
 347 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 348         __be16                          vlan_proto;
 349         u16                             default_pvid;
 350         struct net_bridge_vlan_group    __rcu *vlgrp;
 351 #endif
 352
 353         struct rhashtable               fdb_hash_tbl;
 354 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 355         union {
 356                 struct rtable           fake_rtable;
 357                 struct rt6_info         fake_rt6_info;
 358         };
 359 #endif
 360         u16                             group_fwd_mask;
 361         u16                             group_fwd_mask_required;
 362
 363         /* STP */
 364         bridge_id                       designated_root;
 365         bridge_id                       bridge_id;
 366         unsigned char                   topology_change;
 367         unsigned char                   topology_change_detected;
 368         u16                             root_port;
 369         unsigned long                   max_age;
 370         unsigned long                   hello_time;
 371         unsigned long                   forward_delay;
 372         unsigned long                   ageing_time;
 373         unsigned long                   bridge_max_age;
 374         unsigned long                   bridge_hello_time;
 375         unsigned long                   bridge_forward_delay;
 376         unsigned long                   bridge_ageing_time;
 377         u32                             root_path_cost;
 378
 379         u8                              group_addr[ETH_ALEN];
 380
 381         enum {
 382                 BR_NO_STP,              /* no spanning tree */
 383                 BR_KERNEL_STP,          /* old STP in kernel */
 384                 BR_USER_STP,            /* new RSTP in userspace */
 385         } stp_enabled;
 386
 387 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 388
 389         u32                             hash_max;
 390
 391         u32                             multicast_last_member_count;
 392         u32                             multicast_startup_query_count;
 393
 394         u8                              multicast_igmp_version;
 395         u8                              multicast_router;
 396 #if IS_ENABLED(CONFIG_IPV6)
 397         u8                              multicast_mld_version;
 398 #endif
 399         spinlock_t                      multicast_lock;
 400         unsigned long                   multicast_last_member_interval;
 401         unsigned long                   multicast_membership_interval;
 402         unsigned long                   multicast_querier_interval;
 403         unsigned long                   multicast_query_interval;
 404         unsigned long                   multicast_query_response_interval;
 405         unsigned long                   multicast_startup_query_interval;
 406
 407         struct rhashtable               mdb_hash_tbl;
 408
 409         struct hlist_head               mdb_list;
 410         struct hlist_head               router_list;
 411
 412         struct timer_list               multicast_router_timer;
 413         struct bridge_mcast_other_query ip4_other_query;
 414         struct bridge_mcast_own_query   ip4_own_query;
 415         struct bridge_mcast_querier     ip4_querier;
 416         struct bridge_mcast_stats       __percpu *mcast_stats;
 417 #if IS_ENABLED(CONFIG_IPV6)
 418         struct bridge_mcast_other_query ip6_other_query;
 419         struct bridge_mcast_own_query   ip6_own_query;
 420         struct bridge_mcast_querier     ip6_querier;
 421 #endif /* IS_ENABLED(CONFIG_IPV6) */
 422 #endif
 423
 424         struct timer_list               hello_timer;
 425         struct timer_list               tcn_timer;
 426         struct timer_list               topology_change_timer;
 427         struct delayed_work             gc_work;
 428         struct kobject                  *ifobj;
 429         u32                             auto_cnt;
 430
 431 #ifdef CONFIG_NET_SWITCHDEV
 432         int offload_fwd_mark;
 433 #endif
 434         struct hlist_head               fdb_list;
 435
 436 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 437         struct list_head                mrp_list;
 438 #endif
 439 };
 440
 441 struct br_input_skb_cb {
 442         struct net_device *brdev;
 443
 444         u16 frag_max_size;
 445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 446         u8 igmp;
 447         u8 mrouters_only:1;
 448 #endif
 449         u8 proxyarp_replied:1;
 450         u8 src_port_isolated:1;
 451 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 452         u8 vlan_filtered:1;
 453 #endif
 454 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 455         u8 br_netfilter_broute:1;
 456 #endif
 457
 458 #ifdef CONFIG_NET_SWITCHDEV
 459         int offload_fwd_mark;
 460 #endif
 461 };
 462
 463 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 464
 465 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 466 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 467 #else
 468 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 469 #endif
 470
 471 #define br_printk(level, br, format, args...)   \
 472         printk(level "%s: " format, (br)->dev->name, ##args)
 473
 474 #define br_err(__br, format, args...)                   \
 475         br_printk(KERN_ERR, __br, format, ##args)
 476 #define br_warn(__br, format, args...)                  \
 477         br_printk(KERN_WARNING, __br, format, ##args)
 478 #define br_notice(__br, format, args...)                \
 479         br_printk(KERN_NOTICE, __br, format, ##args)
 480 #define br_info(__br, format, args...)                  \
 481         br_printk(KERN_INFO, __br, format, ##args)
 482
 483 #define br_debug(br, format, args...)                   \
 484         pr_debug("%s: " format,  (br)->dev->name, ##args)
 485
 486 /* called under bridge lock */
 487 static inline int br_is_root_bridge(const struct net_bridge *br)
 488 {
 489         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 490 }
 491
 492 /* check if a VLAN entry is global */
 493 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 494 {
 495         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 496 }
 497
 498 /* check if a VLAN entry is used by the bridge */
 499 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 500 {
 501         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 502 }
 503
 504 /* check if we should use the vlan entry, returns false if it's only context */
 505 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 506 {
 507         if (br_vlan_is_master(v)) {
 508                 if (br_vlan_is_brentry(v))
 509                         return true;
 510                 else
 511                         return false;
 512         }
 513
 514         return true;
 515 }
 516
 517 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 518 {
 519         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 520 }
 521
 522 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 523 {
 524         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 525
 526         if (!ret)
 527                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 528
 529         return ret;
 530 }
 531
 532 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 533                                        const struct bridge_vlan_info *last,
 534                                        struct netlink_ext_ack *extack)
 535 {
 536         /* pvid flag is not allowed in ranges */
 537         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 538                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 539                 return false;
 540         }
 541
 542         /* when cur is the range end, check if:
 543          *  - it has range start flag
 544          *  - range ids are invalid (end is equal to or before start)
 545          */
 546         if (last) {
 547                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 548                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 549                         return false;
 550                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 551                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 552                         return false;
 553                 } else if (cur->vid <= last->vid) {
 554                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 555                         return false;
 556                 }
 557         }
 558
 559         /* check for required range flags */
 560         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 561                             BRIDGE_VLAN_INFO_RANGE_END))) {
 562                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 563                 return false;
 564         }
 565
 566         return true;
 567 }
 568
 569 static inline int br_afspec_cmd_to_rtm(int cmd)
 570 {
 571         switch (cmd) {
 572         case RTM_SETLINK:
 573                 return RTM_NEWVLAN;
 574         case RTM_DELLINK:
 575                 return RTM_DELVLAN;
 576         }
 577
 578         return 0;
 579 }
 580
 581 static inline int br_opt_get(const struct net_bridge *br,
 582                              enum net_bridge_opts opt)
 583 {
 584         return test_bit(opt, &br->options);
 585 }
 586
 587 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 588                       struct netlink_ext_ack *extack);
 589 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 590 int br_boolopt_multi_toggle(struct net_bridge *br,
 591                             struct br_boolopt_multi *bm,
 592                             struct netlink_ext_ack *extack);
 593 void br_boolopt_multi_get(const struct net_bridge *br,
 594                           struct br_boolopt_multi *bm);
 595 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 596
 597 /* br_device.c */
 598 void br_dev_setup(struct net_device *dev);
 599 void br_dev_delete(struct net_device *dev, struct list_head *list);
 600 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 601 #ifdef CONFIG_NET_POLL_CONTROLLER
 602 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 603                                        struct sk_buff *skb)
 604 {
 605         netpoll_send_skb(p->np, skb);
 606 }
 607
 608 int br_netpoll_enable(struct net_bridge_port *p);
 609 void br_netpoll_disable(struct net_bridge_port *p);
 610 #else
 611 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 612                                        struct sk_buff *skb)
 613 {
 614 }
 615
 616 static inline int br_netpoll_enable(struct net_bridge_port *p)
 617 {
 618         return 0;
 619 }
 620
 621 static inline void br_netpoll_disable(struct net_bridge_port *p)
 622 {
 623 }
 624 #endif
 625
 626 /* br_fdb.c */
 627 int br_fdb_init(void);
 628 void br_fdb_fini(void);
 629 int br_fdb_hash_init(struct net_bridge *br);
 630 void br_fdb_hash_fini(struct net_bridge *br);
 631 void br_fdb_flush(struct net_bridge *br);
 632 void br_fdb_find_delete_local(struct net_bridge *br,
 633                               const struct net_bridge_port *p,
 634                               const unsigned char *addr, u16 vid);
 635 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 636 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 637 void br_fdb_cleanup(struct work_struct *work);
 638 void br_fdb_delete_by_port(struct net_bridge *br,
 639                            const struct net_bridge_port *p, u16 vid, int do_all);
 640 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 641                                              const unsigned char *addr,
 642                                              __u16 vid);
 643 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 644 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 645                    unsigned long off);
 646 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 647                   const unsigned char *addr, u16 vid);
 648 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 649                    const unsigned char *addr, u16 vid, unsigned long flags);
 650
 651 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 652                   struct net_device *dev, const unsigned char *addr, u16 vid);
 653 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 654                const unsigned char *addr, u16 vid, u16 nlh_flags,
 655                struct netlink_ext_ack *extack);
 656 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 657                 struct net_device *dev, struct net_device *fdev, int *idx);
 658 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 659                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 660                struct netlink_ext_ack *extack);
 661 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 662 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 663 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 664                               const unsigned char *addr, u16 vid,
 665                               bool swdev_notify);
 666 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 667                               const unsigned char *addr, u16 vid,
 668                               bool swdev_notify);
 669 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 670                           const unsigned char *addr, u16 vid, bool offloaded);
 671
 672 /* br_forward.c */
 673 enum br_pkt_type {
 674         BR_PKT_UNICAST,
 675         BR_PKT_MULTICAST,
 676         BR_PKT_BROADCAST
 677 };
 678 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 679 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 680                 bool local_rcv, bool local_orig);
 681 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 682 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 683               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 684
 685 /* return true if both source port and dest port are isolated */
 686 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 687                                    const struct sk_buff *skb)
 688 {
 689         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 690                (to->flags & BR_ISOLATED);
 691 }
 692
 693 /* br_if.c */
 694 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 695 int br_add_bridge(struct net *net, const char *name);
 696 int br_del_bridge(struct net *net, const char *name);
 697 int br_add_if(struct net_bridge *br, struct net_device *dev,
 698               struct netlink_ext_ack *extack);
 699 int br_del_if(struct net_bridge *br, struct net_device *dev);
 700 void br_mtu_auto_adjust(struct net_bridge *br);
 701 netdev_features_t br_features_recompute(struct net_bridge *br,
 702                                         netdev_features_t features);
 703 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 704 void br_manage_promisc(struct net_bridge *br);
 705 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 706
 707 /* br_input.c */
 708 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 709 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 710
 711 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 712 {
 713         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 714 }
 715
 716 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 717 {
 718         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 719 }
 720
 721 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 722 {
 723         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 724 }
 725
 726 static inline struct net_bridge_port *
 727 br_port_get_check_rtnl(const struct net_device *dev)
 728 {
 729         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 730 }
 731
 732 /* br_ioctl.c */
 733 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 734 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 735                              void __user *arg);
 736
 737 /* br_multicast.c */
 738 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 739 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 740                      struct sk_buff *skb, u16 vid);
 741 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 742                                         struct sk_buff *skb, u16 vid);
 743 int br_multicast_add_port(struct net_bridge_port *port);
 744 void br_multicast_del_port(struct net_bridge_port *port);
 745 void br_multicast_enable_port(struct net_bridge_port *port);
 746 void br_multicast_disable_port(struct net_bridge_port *port);
 747 void br_multicast_init(struct net_bridge *br);
 748 void br_multicast_open(struct net_bridge *br);
 749 void br_multicast_stop(struct net_bridge *br);
 750 void br_multicast_dev_del(struct net_bridge *br);
 751 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 752                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 753 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 754 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 755 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 756 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 757 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 758 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 759 #if IS_ENABLED(CONFIG_IPV6)
 760 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 761 #endif
 762 struct net_bridge_mdb_entry *
 763 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 764 struct net_bridge_mdb_entry *
 765 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 766 struct net_bridge_port_group *
 767 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 768                             struct net_bridge_port_group __rcu *next,
 769                             unsigned char flags, const unsigned char *src);
 770 int br_mdb_hash_init(struct net_bridge *br);
 771 void br_mdb_hash_fini(struct net_bridge *br);
 772 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 773                    struct br_ip *group, int type, u8 flags);
 774 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 775                    int type);
 776 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 777                         const struct sk_buff *skb, u8 type, u8 dir);
 778 int br_multicast_init_stats(struct net_bridge *br);
 779 void br_multicast_uninit_stats(struct net_bridge *br);
 780 void br_multicast_get_stats(const struct net_bridge *br,
 781                             const struct net_bridge_port *p,
 782                             struct br_mcast_stats *dest);
 783 void br_mdb_init(void);
 784 void br_mdb_uninit(void);
 785 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 786 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 787
 788 #define mlock_dereference(X, br) \
 789         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 790
 791 static inline bool br_multicast_is_router(struct net_bridge *br)
 792 {
 793         return br->multicast_router == 2 ||
 794                (br->multicast_router == 1 &&
 795                 timer_pending(&br->multicast_router_timer));
 796 }
 797
 798 static inline bool
 799 __br_multicast_querier_exists(struct net_bridge *br,
 800                                 struct bridge_mcast_other_query *querier,
 801                                 const bool is_ipv6)
 802 {
 803         bool own_querier_enabled;
 804
 805         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 806                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 807                         own_querier_enabled = false;
 808                 else
 809                         own_querier_enabled = true;
 810         } else {
 811                 own_querier_enabled = false;
 812         }
 813
 814         return time_is_before_jiffies(querier->delay_time) &&
 815                (own_querier_enabled || timer_pending(&querier->timer));
 816 }
 817
 818 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 819                                                struct ethhdr *eth)
 820 {
 821         switch (eth->h_proto) {
 822         case (htons(ETH_P_IP)):
 823                 return __br_multicast_querier_exists(br,
 824                         &br->ip4_other_query, false);
 825 #if IS_ENABLED(CONFIG_IPV6)
 826         case (htons(ETH_P_IPV6)):
 827                 return __br_multicast_querier_exists(br,
 828                         &br->ip6_other_query, true);
 829 #endif
 830         default:
 831                 return false;
 832         }
 833 }
 834
 835 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 836 {
 837         return BR_INPUT_SKB_CB(skb)->igmp;
 838 }
 839 #else
 840 static inline int br_multicast_rcv(struct net_bridge *br,
 841                                    struct net_bridge_port *port,
 842                                    struct sk_buff *skb,
 843                                    u16 vid)
 844 {
 845         return 0;
 846 }
 847
 848 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 849                                                       struct sk_buff *skb, u16 vid)
 850 {
 851         return NULL;
 852 }
 853
 854 static inline int br_multicast_add_port(struct net_bridge_port *port)
 855 {
 856         return 0;
 857 }
 858
 859 static inline void br_multicast_del_port(struct net_bridge_port *port)
 860 {
 861 }
 862
 863 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 864 {
 865 }
 866
 867 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 868 {
 869 }
 870
 871 static inline void br_multicast_init(struct net_bridge *br)
 872 {
 873 }
 874
 875 static inline void br_multicast_open(struct net_bridge *br)
 876 {
 877 }
 878
 879 static inline void br_multicast_stop(struct net_bridge *br)
 880 {
 881 }
 882
 883 static inline void br_multicast_dev_del(struct net_bridge *br)
 884 {
 885 }
 886
 887 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 888                                       struct sk_buff *skb,
 889                                       bool local_rcv, bool local_orig)
 890 {
 891 }
 892
 893 static inline bool br_multicast_is_router(struct net_bridge *br)
 894 {
 895         return false;
 896 }
 897
 898 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 899                                                struct ethhdr *eth)
 900 {
 901         return false;
 902 }
 903
 904 static inline void br_mdb_init(void)
 905 {
 906 }
 907
 908 static inline void br_mdb_uninit(void)
 909 {
 910 }
 911
 912 static inline int br_mdb_hash_init(struct net_bridge *br)
 913 {
 914         return 0;
 915 }
 916
 917 static inline void br_mdb_hash_fini(struct net_bridge *br)
 918 {
 919 }
 920
 921 static inline void br_multicast_count(struct net_bridge *br,
 922                                       const struct net_bridge_port *p,
 923                                       const struct sk_buff *skb,
 924                                       u8 type, u8 dir)
 925 {
 926 }
 927
 928 static inline int br_multicast_init_stats(struct net_bridge *br)
 929 {
 930         return 0;
 931 }
 932
 933 static inline void br_multicast_uninit_stats(struct net_bridge *br)
 934 {
 935 }
 936
 937 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 938 {
 939         return 0;
 940 }
 941 #endif
 942
 943 /* br_vlan.c */
 944 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 945 bool br_allowed_ingress(const struct net_bridge *br,
 946                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 947                         u16 *vid, u8 *state);
 948 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 949                        const struct sk_buff *skb);
 950 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 951 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 952                                const struct net_bridge_port *port,
 953                                struct net_bridge_vlan_group *vg,
 954                                struct sk_buff *skb);
 955 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 956                 bool *changed, struct netlink_ext_ack *extack);
 957 int br_vlan_delete(struct net_bridge *br, u16 vid);
 958 void br_vlan_flush(struct net_bridge *br);
 959 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 960 void br_recalculate_fwd_mask(struct net_bridge *br);
 961 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 962 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 963 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
 964 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 965 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
 966 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
 967 int br_vlan_init(struct net_bridge *br);
 968 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
 969 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 970                                struct netlink_ext_ack *extack);
 971 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 972                  bool *changed, struct netlink_ext_ack *extack);
 973 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 974 void nbp_vlan_flush(struct net_bridge_port *port);
 975 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
 976 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 977 void br_vlan_get_stats(const struct net_bridge_vlan *v,
 978                        struct br_vlan_stats *stats);
 979 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
 980 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
 981                          void *ptr);
 982 void br_vlan_rtnl_init(void);
 983 void br_vlan_rtnl_uninit(void);
 984 void br_vlan_notify(const struct net_bridge *br,
 985                     const struct net_bridge_port *p,
 986                     u16 vid, u16 vid_range,
 987                     int cmd);
 988 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
 989                              const struct net_bridge_vlan *range_end);
 990
 991 static inline struct net_bridge_vlan_group *br_vlan_group(
 992                                         const struct net_bridge *br)
 993 {
 994         return rtnl_dereference(br->vlgrp);
 995 }
 996
 997 static inline struct net_bridge_vlan_group *nbp_vlan_group(
 998                                         const struct net_bridge_port *p)
 999 {
1000         return rtnl_dereference(p->vlgrp);
1001 }
1002
1003 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1004                                         const struct net_bridge *br)
1005 {
1006         return rcu_dereference(br->vlgrp);
1007 }
1008
1009 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1010                                         const struct net_bridge_port *p)
1011 {
1012         return rcu_dereference(p->vlgrp);
1013 }
1014
1015 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1016  * skb, the vlan tag will always be present if the frame was tagged.
1017  */
1018 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1019 {
1020         int err = 0;
1021
1022         if (skb_vlan_tag_present(skb)) {
1023                 *vid = skb_vlan_tag_get_id(skb);
1024         } else {
1025                 *vid = 0;
1026                 err = -EINVAL;
1027         }
1028
1029         return err;
1030 }
1031
1032 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1033 {
1034         if (!vg)
1035                 return 0;
1036
1037         smp_rmb();
1038         return vg->pvid;
1039 }
1040
1041 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1042 {
1043         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1044 }
1045 #else
1046 static inline bool br_allowed_ingress(const struct net_bridge *br,
1047                                       struct net_bridge_vlan_group *vg,
1048                                       struct sk_buff *skb,
1049                                       u16 *vid, u8 *state)
1050 {
1051         return true;
1052 }
1053
1054 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1055                                      const struct sk_buff *skb)
1056 {
1057         return true;
1058 }
1059
1060 static inline bool br_should_learn(struct net_bridge_port *p,
1061                                    struct sk_buff *skb, u16 *vid)
1062 {
1063         return true;
1064 }
1065
1066 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1067                                              const struct net_bridge_port *port,
1068                                              struct net_bridge_vlan_group *vg,
1069                                              struct sk_buff *skb)
1070 {
1071         return skb;
1072 }
1073
1074 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1075                               bool *changed, struct netlink_ext_ack *extack)
1076 {
1077         *changed = false;
1078         return -EOPNOTSUPP;
1079 }
1080
1081 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1082 {
1083         return -EOPNOTSUPP;
1084 }
1085
1086 static inline void br_vlan_flush(struct net_bridge *br)
1087 {
1088 }
1089
1090 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1091 {
1092 }
1093
1094 static inline int br_vlan_init(struct net_bridge *br)
1095 {
1096         return 0;
1097 }
1098
1099 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1100                                bool *changed, struct netlink_ext_ack *extack)
1101 {
1102         *changed = false;
1103         return -EOPNOTSUPP;
1104 }
1105
1106 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1107 {
1108         return -EOPNOTSUPP;
1109 }
1110
1111 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1112 {
1113 }
1114
1115 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1116                                                    u16 vid)
1117 {
1118         return NULL;
1119 }
1120
1121 static inline int nbp_vlan_init(struct net_bridge_port *port,
1122                                 struct netlink_ext_ack *extack)
1123 {
1124         return 0;
1125 }
1126
1127 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1128 {
1129         return 0;
1130 }
1131
1132 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1133 {
1134         return 0;
1135 }
1136
1137 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1138                                           unsigned long val)
1139 {
1140         return -EOPNOTSUPP;
1141 }
1142
1143 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1144                                          u32 filter_mask)
1145 {
1146         return 0;
1147 }
1148
1149 static inline struct net_bridge_vlan_group *br_vlan_group(
1150                                         const struct net_bridge *br)
1151 {
1152         return NULL;
1153 }
1154
1155 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1156                                         const struct net_bridge_port *p)
1157 {
1158         return NULL;
1159 }
1160
1161 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1162                                         const struct net_bridge *br)
1163 {
1164         return NULL;
1165 }
1166
1167 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1168                                         const struct net_bridge_port *p)
1169 {
1170         return NULL;
1171 }
1172
1173 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1174                                      struct br_vlan_stats *stats)
1175 {
1176 }
1177
1178 static inline void br_vlan_port_event(struct net_bridge_port *p,
1179                                       unsigned long event)
1180 {
1181 }
1182
1183 static inline int br_vlan_bridge_event(struct net_device *dev,
1184                                        unsigned long event, void *ptr)
1185 {
1186         return 0;
1187 }
1188
1189 static inline void br_vlan_rtnl_init(void)
1190 {
1191 }
1192
1193 static inline void br_vlan_rtnl_uninit(void)
1194 {
1195 }
1196
1197 static inline void br_vlan_notify(const struct net_bridge *br,
1198                                   const struct net_bridge_port *p,
1199                                   u16 vid, u16 vid_range,
1200                                   int cmd)
1201 {
1202 }
1203
1204 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1205                                            const struct net_bridge_vlan *range_end)
1206 {
1207         return true;
1208 }
1209 #endif
1210
1211 /* br_vlan_options.c */
1212 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1213 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1214                            const struct net_bridge_vlan *range_end);
1215 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1216 size_t br_vlan_opts_nl_size(void);
1217 int br_vlan_process_options(const struct net_bridge *br,
1218                             const struct net_bridge_port *p,
1219                             struct net_bridge_vlan *range_start,
1220                             struct net_bridge_vlan *range_end,
1221                             struct nlattr **tb,
1222                             struct netlink_ext_ack *extack);
1223
1224 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1225 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1226 {
1227         return READ_ONCE(v->state);
1228 }
1229
1230 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1231 {
1232         WRITE_ONCE(v->state, state);
1233 }
1234
1235 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1236 {
1237         return READ_ONCE(vg->pvid_state);
1238 }
1239
1240 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1241                                           u8 state)
1242 {
1243         WRITE_ONCE(vg->pvid_state, state);
1244 }
1245
1246 /* learn_allow is true at ingress and false at egress */
1247 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1248 {
1249         switch (state) {
1250         case BR_STATE_LEARNING:
1251                 return learn_allow;
1252         case BR_STATE_FORWARDING:
1253                 return true;
1254         default:
1255                 return false;
1256         }
1257 }
1258 #endif
1259
1260 struct nf_br_ops {
1261         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1262 };
1263 extern const struct nf_br_ops __rcu *nf_br_ops;
1264
1265 /* br_netfilter.c */
1266 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1267 int br_nf_core_init(void);
1268 void br_nf_core_fini(void);
1269 void br_netfilter_rtable_init(struct net_bridge *);
1270 #else
1271 static inline int br_nf_core_init(void) { return 0; }
1272 static inline void br_nf_core_fini(void) {}
1273 #define br_netfilter_rtable_init(x)
1274 #endif
1275
1276 /* br_stp.c */
1277 void br_set_state(struct net_bridge_port *p, unsigned int state);
1278 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1279 void br_init_port(struct net_bridge_port *p);
1280 void br_become_designated_port(struct net_bridge_port *p);
1281
1282 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1283 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1284 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1285 int br_set_max_age(struct net_bridge *br, unsigned long x);
1286 int __set_ageing_time(struct net_device *dev, unsigned long t);
1287 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1288
1289
1290 /* br_stp_if.c */
1291 void br_stp_enable_bridge(struct net_bridge *br);
1292 void br_stp_disable_bridge(struct net_bridge *br);
1293 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1294                        struct netlink_ext_ack *extack);
1295 void br_stp_enable_port(struct net_bridge_port *p);
1296 void br_stp_disable_port(struct net_bridge_port *p);
1297 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1298 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1299 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1300 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1301 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1302 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1303
1304 /* br_stp_bpdu.c */
1305 struct stp_proto;
1306 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1307                 struct net_device *dev);
1308
1309 /* br_stp_timer.c */
1310 void br_stp_timer_init(struct net_bridge *br);
1311 void br_stp_port_timer_init(struct net_bridge_port *p);
1312 unsigned long br_timer_value(const struct timer_list *timer);
1313
1314 /* br.c */
1315 #if IS_ENABLED(CONFIG_ATM_LANE)
1316 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1317 #endif
1318
1319 /* br_mrp.c */
1320 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1321 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1322                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1323 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb);
1324 bool br_mrp_enabled(struct net_bridge *br);
1325 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1326 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1327 #else
1328 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1329                                struct nlattr *attr, int cmd,
1330                                struct netlink_ext_ack *extack)
1331 {
1332         return -EOPNOTSUPP;
1333 }
1334
1335 static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
1336 {
1337         return 0;
1338 }
1339
1340 static inline bool br_mrp_enabled(struct net_bridge *br)
1341 {
1342         return false;
1343 }
1344
1345 static inline void br_mrp_port_del(struct net_bridge *br,
1346                                    struct net_bridge_port *p)
1347 {
1348 }
1349
1350 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1351 {
1352         return 0;
1353 }
1354
1355 #endif
1356
1357 /* br_netlink.c */
1358 extern struct rtnl_link_ops br_link_ops;
1359 int br_netlink_init(void);
1360 void br_netlink_fini(void);
1361 void br_ifinfo_notify(int event, const struct net_bridge *br,
1362                       const struct net_bridge_port *port);
1363 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1364                struct netlink_ext_ack *extack);
1365 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1366 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1367                u32 filter_mask, int nlflags);
1368 int br_process_vlan_info(struct net_bridge *br,
1369                          struct net_bridge_port *p, int cmd,
1370                          struct bridge_vlan_info *vinfo_curr,
1371                          struct bridge_vlan_info **vinfo_last,
1372                          bool *changed,
1373                          struct netlink_ext_ack *extack);
1374
1375 #ifdef CONFIG_SYSFS
1376 /* br_sysfs_if.c */
1377 extern const struct sysfs_ops brport_sysfs_ops;
1378 int br_sysfs_addif(struct net_bridge_port *p);
1379 int br_sysfs_renameif(struct net_bridge_port *p);
1380
1381 /* br_sysfs_br.c */
1382 int br_sysfs_addbr(struct net_device *dev);
1383 void br_sysfs_delbr(struct net_device *dev);
1384
1385 #else
1386
1387 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1388 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1389 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1390 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1391 #endif /* CONFIG_SYSFS */
1392
1393 /* br_switchdev.c */
1394 #ifdef CONFIG_NET_SWITCHDEV
1395 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1396 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1397                               struct sk_buff *skb);
1398 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1399                                   const struct sk_buff *skb);
1400 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1401                                unsigned long flags,
1402                                unsigned long mask);
1403 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1404                              int type);
1405 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1406                                struct netlink_ext_ack *extack);
1407 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1408
1409 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1410 {
1411         skb->offload_fwd_mark = 0;
1412 }
1413 #else
1414 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1415 {
1416         return 0;
1417 }
1418
1419 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1420                                             struct sk_buff *skb)
1421 {
1422 }
1423
1424 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1425                                                 const struct sk_buff *skb)
1426 {
1427         return true;
1428 }
1429
1430 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1431                                              unsigned long flags,
1432                                              unsigned long mask)
1433 {
1434         return 0;
1435 }
1436
1437 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1438                                              u16 vid, u16 flags,
1439                                              struct netlink_ext_ack *extack)
1440 {
1441         return -EOPNOTSUPP;
1442 }
1443
1444 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1445 {
1446         return -EOPNOTSUPP;
1447 }
1448
1449 static inline void
1450 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1451 {
1452 }
1453
1454 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1455 {
1456 }
1457 #endif /* CONFIG_NET_SWITCHDEV */
1458
1459 /* br_arp_nd_proxy.c */
1460 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1461 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1462                               u16 vid, struct net_bridge_port *p);
1463 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1464                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1465 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1466 #endif