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