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