net/bridge/br_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  */
   8
   9 #ifndef _BR_PRIVATE_H
  10 #define _BR_PRIVATE_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/if_bridge.h>
  14 #include <linux/netpoll.h>
  15 #include <linux/u64_stats_sync.h>
  16 #include <net/route.h>
  17 #include <net/ip6_fib.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/rhashtable.h>
  20 #include <linux/refcount.h>
  21
  22 #define BR_HASH_BITS 8
  23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25 #define BR_HOLD_TIME (1*HZ)
  26
  27 #define BR_PORT_BITS    10
  28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  29
  30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  31
  32 #define BR_VERSION      "2.3"
  33
  34 /* Control of forwarding link local multicast */
  35 #define BR_GROUPFWD_DEFAULT     0
  36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  37 enum {
  38         BR_GROUPFWD_STP         = BIT(0),
  39         BR_GROUPFWD_MACPAUSE    = BIT(1),
  40         BR_GROUPFWD_LACP        = BIT(2),
  41 };
  42
  43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  44                                 BR_GROUPFWD_LACP)
  45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  46 #define BR_GROUPFWD_8021AD      0xB801u
  47
  48 /* Path to usermode spanning tree program */
  49 #define BR_STP_PROG     "/sbin/bridge-stp"
  50
  51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  52
  53 typedef struct bridge_id bridge_id;
  54 typedef struct mac_addr mac_addr;
  55 typedef __u16 port_id;
  56
  57 struct bridge_id {
  58         unsigned char   prio[2];
  59         unsigned char   addr[ETH_ALEN];
  60 };
  61
  62 struct mac_addr {
  63         unsigned char   addr[ETH_ALEN];
  64 };
  65
  66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  67 /* our own querier */
  68 struct bridge_mcast_own_query {
  69         struct timer_list       timer;
  70         u32                     startup_sent;
  71 };
  72
  73 /* other querier */
  74 struct bridge_mcast_other_query {
  75         struct timer_list               timer;
  76         unsigned long                   delay_time;
  77 };
  78
  79 /* selected querier */
  80 struct bridge_mcast_querier {
  81         struct br_ip addr;
  82         struct net_bridge_port __rcu    *port;
  83 };
  84
  85 /* IGMP/MLD statistics */
  86 struct bridge_mcast_stats {
  87         struct br_mcast_stats mstats;
  88         struct u64_stats_sync syncp;
  89 };
  90 #endif
  91
  92 struct br_vlan_stats {
  93         u64 rx_bytes;
  94         u64 rx_packets;
  95         u64 tx_bytes;
  96         u64 tx_packets;
  97         struct u64_stats_sync syncp;
  98 };
  99
 100 struct br_tunnel_info {
 101         __be64                  tunnel_id;
 102         struct metadata_dst     *tunnel_dst;
 103 };
 104
 105 /* private vlan flags */
 106 enum {
 107         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 108         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 109 };
 110
 111 /**
 112  * struct net_bridge_vlan - per-vlan entry
 113  *
 114  * @vnode: rhashtable member
 115  * @vid: VLAN id
 116  * @flags: bridge vlan flags
 117  * @priv_flags: private (in-kernel) bridge vlan flags
 118  * @state: STP state (e.g. blocking, learning, forwarding)
 119  * @stats: per-cpu VLAN statistics
 120  * @br: if MASTER flag set, this points to a bridge struct
 121  * @port: if MASTER flag unset, this points to a port struct
 122  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 123  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 124  *          for this VLAN entry
 125  * @vlist: sorted list of VLAN entries
 126  * @rcu: used for entry destruction
 127  *
 128  * This structure is shared between the global per-VLAN entries contained in
 129  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 130  * the port's rhashtable. The union entries should be interpreted depending on
 131  * the entry flags that are set.
 132  */
 133 struct net_bridge_vlan {
 134         struct rhash_head               vnode;
 135         struct rhash_head               tnode;
 136         u16                             vid;
 137         u16                             flags;
 138         u16                             priv_flags;
 139         u8                              state;
 140         struct br_vlan_stats __percpu   *stats;
 141         union {
 142                 struct net_bridge       *br;
 143                 struct net_bridge_port  *port;
 144         };
 145         union {
 146                 refcount_t              refcnt;
 147                 struct net_bridge_vlan  *brvlan;
 148         };
 149
 150         struct br_tunnel_info           tinfo;
 151
 152         struct list_head                vlist;
 153
 154         struct rcu_head                 rcu;
 155 };
 156
 157 /**
 158  * struct net_bridge_vlan_group
 159  *
 160  * @vlan_hash: VLAN entry rhashtable
 161  * @vlan_list: sorted VLAN entry list
 162  * @num_vlans: number of total VLAN entries
 163  * @pvid: PVID VLAN id
 164  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 165  *
 166  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 167  *            primitives because the bridge can have entries in its list which
 168  *            are just for global context but not for filtering, i.e. they have
 169  *            the master flag set but not the brentry flag. If you have to check
 170  *            if there're "real" entries in the bridge please test @num_vlans
 171  */
 172 struct net_bridge_vlan_group {
 173         struct rhashtable               vlan_hash;
 174         struct rhashtable               tunnel_hash;
 175         struct list_head                vlan_list;
 176         u16                             num_vlans;
 177         u16                             pvid;
 178         u8                              pvid_state;
 179 };
 180
 181 /* bridge fdb flags */
 182 enum {
 183         BR_FDB_LOCAL,
 184         BR_FDB_STATIC,
 185         BR_FDB_STICKY,
 186         BR_FDB_ADDED_BY_USER,
 187         BR_FDB_ADDED_BY_EXT_LEARN,
 188         BR_FDB_OFFLOADED,
 189         BR_FDB_NOTIFY,
 190         BR_FDB_NOTIFY_INACTIVE
 191 };
 192
 193 struct net_bridge_fdb_key {
 194         mac_addr addr;
 195         u16 vlan_id;
 196 };
 197
 198 struct net_bridge_fdb_entry {
 199         struct rhash_head               rhnode;
 200         struct net_bridge_port          *dst;
 201
 202         struct net_bridge_fdb_key       key;
 203         struct hlist_node               fdb_node;
 204         unsigned long                   flags;
 205
 206         /* write-heavy members should not affect lookups */
 207         unsigned long                   updated ____cacheline_aligned_in_smp;
 208         unsigned long                   used;
 209
 210         struct rcu_head                 rcu;
 211 };
 212
 213 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 214 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 216 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 217 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 218
 219 #define PG_SRC_ENT_LIMIT        32
 220
 221 #define BR_SGRP_F_DELETE        BIT(0)
 222 #define BR_SGRP_F_SEND          BIT(1)
 223 #define BR_SGRP_F_INSTALLED     BIT(2)
 224
 225 struct net_bridge_mcast_gc {
 226         struct hlist_node               gc_node;
 227         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 228 };
 229
 230 struct net_bridge_group_src {
 231         struct hlist_node               node;
 232
 233         struct br_ip                    addr;
 234         struct net_bridge_port_group    *pg;
 235         u8                              flags;
 236         u8                              src_query_rexmit_cnt;
 237         struct timer_list               timer;
 238
 239         struct net_bridge               *br;
 240         struct net_bridge_mcast_gc      mcast_gc;
 241         struct rcu_head                 rcu;
 242 };
 243
 244 struct net_bridge_port_group_sg_key {
 245         struct net_bridge_port          *port;
 246         struct br_ip                    addr;
 247 };
 248
 249 struct net_bridge_port_group {
 250         struct net_bridge_port_group __rcu *next;
 251         struct net_bridge_port_group_sg_key key;
 252         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 253         unsigned char                   flags;
 254         unsigned char                   filter_mode;
 255         unsigned char                   grp_query_rexmit_cnt;
 256         unsigned char                   rt_protocol;
 257
 258         struct hlist_head               src_list;
 259         unsigned int                    src_ents;
 260         struct timer_list               timer;
 261         struct timer_list               rexmit_timer;
 262         struct hlist_node               mglist;
 263
 264         struct rhash_head               rhnode;
 265         struct net_bridge_mcast_gc      mcast_gc;
 266         struct rcu_head                 rcu;
 267 };
 268
 269 struct net_bridge_mdb_entry {
 270         struct rhash_head               rhnode;
 271         struct net_bridge               *br;
 272         struct net_bridge_port_group __rcu *ports;
 273         struct br_ip                    addr;
 274         bool                            host_joined;
 275
 276         struct timer_list               timer;
 277         struct hlist_node               mdb_node;
 278
 279         struct net_bridge_mcast_gc      mcast_gc;
 280         struct rcu_head                 rcu;
 281 };
 282
 283 struct net_bridge_port {
 284         struct net_bridge               *br;
 285         struct net_device               *dev;
 286         struct list_head                list;
 287
 288         unsigned long                   flags;
 289 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 290         struct net_bridge_vlan_group    __rcu *vlgrp;
 291 #endif
 292         struct net_bridge_port          __rcu *backup_port;
 293
 294         /* STP */
 295         u8                              priority;
 296         u8                              state;
 297         u16                             port_no;
 298         unsigned char                   topology_change_ack;
 299         unsigned char                   config_pending;
 300         port_id                         port_id;
 301         port_id                         designated_port;
 302         bridge_id                       designated_root;
 303         bridge_id                       designated_bridge;
 304         u32                             path_cost;
 305         u32                             designated_cost;
 306         unsigned long                   designated_age;
 307
 308         struct timer_list               forward_delay_timer;
 309         struct timer_list               hold_timer;
 310         struct timer_list               message_age_timer;
 311         struct kobject                  kobj;
 312         struct rcu_head                 rcu;
 313
 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 315         struct bridge_mcast_own_query   ip4_own_query;
 316 #if IS_ENABLED(CONFIG_IPV6)
 317         struct bridge_mcast_own_query   ip6_own_query;
 318 #endif /* IS_ENABLED(CONFIG_IPV6) */
 319         unsigned char                   multicast_router;
 320         struct bridge_mcast_stats       __percpu *mcast_stats;
 321         struct timer_list               multicast_router_timer;
 322         struct hlist_head               mglist;
 323         struct hlist_node               rlist;
 324 #endif
 325
 326 #ifdef CONFIG_SYSFS
 327         char                            sysfs_name[IFNAMSIZ];
 328 #endif
 329
 330 #ifdef CONFIG_NET_POLL_CONTROLLER
 331         struct netpoll                  *np;
 332 #endif
 333 #ifdef CONFIG_NET_SWITCHDEV
 334         int                             offload_fwd_mark;
 335 #endif
 336         u16                             group_fwd_mask;
 337         u16                             backup_redirected_cnt;
 338
 339         struct bridge_stp_xstats        stp_xstats;
 340 };
 341
 342 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 343
 344 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 345 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 346
 347 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 348 {
 349         return rcu_dereference(dev->rx_handler_data);
 350 }
 351
 352 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 353 {
 354         return netif_is_bridge_port(dev) ?
 355                 rtnl_dereference(dev->rx_handler_data) : NULL;
 356 }
 357
 358 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 359 {
 360         return netif_is_bridge_port(dev) ?
 361                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 362 }
 363
 364 enum net_bridge_opts {
 365         BROPT_VLAN_ENABLED,
 366         BROPT_VLAN_STATS_ENABLED,
 367         BROPT_NF_CALL_IPTABLES,
 368         BROPT_NF_CALL_IP6TABLES,
 369         BROPT_NF_CALL_ARPTABLES,
 370         BROPT_GROUP_ADDR_SET,
 371         BROPT_MULTICAST_ENABLED,
 372         BROPT_MULTICAST_QUERIER,
 373         BROPT_MULTICAST_QUERY_USE_IFADDR,
 374         BROPT_MULTICAST_STATS_ENABLED,
 375         BROPT_HAS_IPV6_ADDR,
 376         BROPT_NEIGH_SUPPRESS_ENABLED,
 377         BROPT_MTU_SET_BY_USER,
 378         BROPT_VLAN_STATS_PER_PORT,
 379         BROPT_NO_LL_LEARN,
 380         BROPT_VLAN_BRIDGE_BINDING,
 381 };
 382
 383 struct net_bridge {
 384         spinlock_t                      lock;
 385         spinlock_t                      hash_lock;
 386         struct hlist_head               frame_type_list;
 387         struct net_device               *dev;
 388         struct pcpu_sw_netstats         __percpu *stats;
 389         unsigned long                   options;
 390         /* These fields are accessed on each packet */
 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 392         __be16                          vlan_proto;
 393         u16                             default_pvid;
 394         struct net_bridge_vlan_group    __rcu *vlgrp;
 395 #endif
 396
 397         struct rhashtable               fdb_hash_tbl;
 398         struct list_head                port_list;
 399 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 400         union {
 401                 struct rtable           fake_rtable;
 402                 struct rt6_info         fake_rt6_info;
 403         };
 404 #endif
 405         u16                             group_fwd_mask;
 406         u16                             group_fwd_mask_required;
 407
 408         /* STP */
 409         bridge_id                       designated_root;
 410         bridge_id                       bridge_id;
 411         unsigned char                   topology_change;
 412         unsigned char                   topology_change_detected;
 413         u16                             root_port;
 414         unsigned long                   max_age;
 415         unsigned long                   hello_time;
 416         unsigned long                   forward_delay;
 417         unsigned long                   ageing_time;
 418         unsigned long                   bridge_max_age;
 419         unsigned long                   bridge_hello_time;
 420         unsigned long                   bridge_forward_delay;
 421         unsigned long                   bridge_ageing_time;
 422         u32                             root_path_cost;
 423
 424         u8                              group_addr[ETH_ALEN];
 425
 426         enum {
 427                 BR_NO_STP,              /* no spanning tree */
 428                 BR_KERNEL_STP,          /* old STP in kernel */
 429                 BR_USER_STP,            /* new RSTP in userspace */
 430         } stp_enabled;
 431
 432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 433
 434         u32                             hash_max;
 435
 436         u32                             multicast_last_member_count;
 437         u32                             multicast_startup_query_count;
 438
 439         u8                              multicast_igmp_version;
 440         u8                              multicast_router;
 441 #if IS_ENABLED(CONFIG_IPV6)
 442         u8                              multicast_mld_version;
 443 #endif
 444         spinlock_t                      multicast_lock;
 445         unsigned long                   multicast_last_member_interval;
 446         unsigned long                   multicast_membership_interval;
 447         unsigned long                   multicast_querier_interval;
 448         unsigned long                   multicast_query_interval;
 449         unsigned long                   multicast_query_response_interval;
 450         unsigned long                   multicast_startup_query_interval;
 451
 452         struct rhashtable               mdb_hash_tbl;
 453         struct rhashtable               sg_port_tbl;
 454
 455         struct hlist_head               mcast_gc_list;
 456         struct hlist_head               mdb_list;
 457         struct hlist_head               router_list;
 458
 459         struct timer_list               multicast_router_timer;
 460         struct bridge_mcast_other_query ip4_other_query;
 461         struct bridge_mcast_own_query   ip4_own_query;
 462         struct bridge_mcast_querier     ip4_querier;
 463         struct bridge_mcast_stats       __percpu *mcast_stats;
 464 #if IS_ENABLED(CONFIG_IPV6)
 465         struct bridge_mcast_other_query ip6_other_query;
 466         struct bridge_mcast_own_query   ip6_own_query;
 467         struct bridge_mcast_querier     ip6_querier;
 468 #endif /* IS_ENABLED(CONFIG_IPV6) */
 469         struct work_struct              mcast_gc_work;
 470 #endif
 471
 472         struct timer_list               hello_timer;
 473         struct timer_list               tcn_timer;
 474         struct timer_list               topology_change_timer;
 475         struct delayed_work             gc_work;
 476         struct kobject                  *ifobj;
 477         u32                             auto_cnt;
 478
 479 #ifdef CONFIG_NET_SWITCHDEV
 480         int offload_fwd_mark;
 481 #endif
 482         struct hlist_head               fdb_list;
 483
 484 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 485         struct list_head                mrp_list;
 486 #endif
 487 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 488         struct hlist_head               mep_list;
 489 #endif
 490 };
 491
 492 struct br_input_skb_cb {
 493         struct net_device *brdev;
 494
 495         u16 frag_max_size;
 496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 497         u8 igmp;
 498         u8 mrouters_only:1;
 499 #endif
 500         u8 proxyarp_replied:1;
 501         u8 src_port_isolated:1;
 502 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 503         u8 vlan_filtered:1;
 504 #endif
 505 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 506         u8 br_netfilter_broute:1;
 507 #endif
 508
 509 #ifdef CONFIG_NET_SWITCHDEV
 510         int offload_fwd_mark;
 511 #endif
 512 };
 513
 514 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 515
 516 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 517 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 518 #else
 519 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 520 #endif
 521
 522 #define br_printk(level, br, format, args...)   \
 523         printk(level "%s: " format, (br)->dev->name, ##args)
 524
 525 #define br_err(__br, format, args...)                   \
 526         br_printk(KERN_ERR, __br, format, ##args)
 527 #define br_warn(__br, format, args...)                  \
 528         br_printk(KERN_WARNING, __br, format, ##args)
 529 #define br_notice(__br, format, args...)                \
 530         br_printk(KERN_NOTICE, __br, format, ##args)
 531 #define br_info(__br, format, args...)                  \
 532         br_printk(KERN_INFO, __br, format, ##args)
 533
 534 #define br_debug(br, format, args...)                   \
 535         pr_debug("%s: " format,  (br)->dev->name, ##args)
 536
 537 /* called under bridge lock */
 538 static inline int br_is_root_bridge(const struct net_bridge *br)
 539 {
 540         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 541 }
 542
 543 /* check if a VLAN entry is global */
 544 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 545 {
 546         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 547 }
 548
 549 /* check if a VLAN entry is used by the bridge */
 550 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 551 {
 552         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 553 }
 554
 555 /* check if we should use the vlan entry, returns false if it's only context */
 556 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 557 {
 558         if (br_vlan_is_master(v)) {
 559                 if (br_vlan_is_brentry(v))
 560                         return true;
 561                 else
 562                         return false;
 563         }
 564
 565         return true;
 566 }
 567
 568 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 569 {
 570         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 571 }
 572
 573 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 574 {
 575         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 576
 577         if (!ret)
 578                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 579
 580         return ret;
 581 }
 582
 583 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 584                                        const struct bridge_vlan_info *last,
 585                                        struct netlink_ext_ack *extack)
 586 {
 587         /* pvid flag is not allowed in ranges */
 588         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 589                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 590                 return false;
 591         }
 592
 593         /* when cur is the range end, check if:
 594          *  - it has range start flag
 595          *  - range ids are invalid (end is equal to or before start)
 596          */
 597         if (last) {
 598                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 599                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 600                         return false;
 601                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 602                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 603                         return false;
 604                 } else if (cur->vid <= last->vid) {
 605                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 606                         return false;
 607                 }
 608         }
 609
 610         /* check for required range flags */
 611         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 612                             BRIDGE_VLAN_INFO_RANGE_END))) {
 613                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 614                 return false;
 615         }
 616
 617         return true;
 618 }
 619
 620 static inline int br_afspec_cmd_to_rtm(int cmd)
 621 {
 622         switch (cmd) {
 623         case RTM_SETLINK:
 624                 return RTM_NEWVLAN;
 625         case RTM_DELLINK:
 626                 return RTM_DELVLAN;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static inline int br_opt_get(const struct net_bridge *br,
 633                              enum net_bridge_opts opt)
 634 {
 635         return test_bit(opt, &br->options);
 636 }
 637
 638 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 639                       struct netlink_ext_ack *extack);
 640 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 641 int br_boolopt_multi_toggle(struct net_bridge *br,
 642                             struct br_boolopt_multi *bm,
 643                             struct netlink_ext_ack *extack);
 644 void br_boolopt_multi_get(const struct net_bridge *br,
 645                           struct br_boolopt_multi *bm);
 646 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 647
 648 /* br_device.c */
 649 void br_dev_setup(struct net_device *dev);
 650 void br_dev_delete(struct net_device *dev, struct list_head *list);
 651 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 652 #ifdef CONFIG_NET_POLL_CONTROLLER
 653 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 654                                        struct sk_buff *skb)
 655 {
 656         netpoll_send_skb(p->np, skb);
 657 }
 658
 659 int br_netpoll_enable(struct net_bridge_port *p);
 660 void br_netpoll_disable(struct net_bridge_port *p);
 661 #else
 662 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 663                                        struct sk_buff *skb)
 664 {
 665 }
 666
 667 static inline int br_netpoll_enable(struct net_bridge_port *p)
 668 {
 669         return 0;
 670 }
 671
 672 static inline void br_netpoll_disable(struct net_bridge_port *p)
 673 {
 674 }
 675 #endif
 676
 677 /* br_fdb.c */
 678 int br_fdb_init(void);
 679 void br_fdb_fini(void);
 680 int br_fdb_hash_init(struct net_bridge *br);
 681 void br_fdb_hash_fini(struct net_bridge *br);
 682 void br_fdb_flush(struct net_bridge *br);
 683 void br_fdb_find_delete_local(struct net_bridge *br,
 684                               const struct net_bridge_port *p,
 685                               const unsigned char *addr, u16 vid);
 686 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 687 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 688 void br_fdb_cleanup(struct work_struct *work);
 689 void br_fdb_delete_by_port(struct net_bridge *br,
 690                            const struct net_bridge_port *p, u16 vid, int do_all);
 691 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 692                                              const unsigned char *addr,
 693                                              __u16 vid);
 694 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 695 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 696                    unsigned long off);
 697 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 698                   const unsigned char *addr, u16 vid);
 699 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 700                    const unsigned char *addr, u16 vid, unsigned long flags);
 701
 702 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 703                   struct net_device *dev, const unsigned char *addr, u16 vid);
 704 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 705                const unsigned char *addr, u16 vid, u16 nlh_flags,
 706                struct netlink_ext_ack *extack);
 707 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 708                 struct net_device *dev, struct net_device *fdev, int *idx);
 709 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 710                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 711                struct netlink_ext_ack *extack);
 712 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 713 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 714 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 715                               const unsigned char *addr, u16 vid,
 716                               bool swdev_notify);
 717 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 718                               const unsigned char *addr, u16 vid,
 719                               bool swdev_notify);
 720 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 721                           const unsigned char *addr, u16 vid, bool offloaded);
 722
 723 /* br_forward.c */
 724 enum br_pkt_type {
 725         BR_PKT_UNICAST,
 726         BR_PKT_MULTICAST,
 727         BR_PKT_BROADCAST
 728 };
 729 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 730 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 731                 bool local_rcv, bool local_orig);
 732 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 733 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 734               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 735
 736 /* return true if both source port and dest port are isolated */
 737 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 738                                    const struct sk_buff *skb)
 739 {
 740         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 741                (to->flags & BR_ISOLATED);
 742 }
 743
 744 /* br_if.c */
 745 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 746 int br_add_bridge(struct net *net, const char *name);
 747 int br_del_bridge(struct net *net, const char *name);
 748 int br_add_if(struct net_bridge *br, struct net_device *dev,
 749               struct netlink_ext_ack *extack);
 750 int br_del_if(struct net_bridge *br, struct net_device *dev);
 751 void br_mtu_auto_adjust(struct net_bridge *br);
 752 netdev_features_t br_features_recompute(struct net_bridge *br,
 753                                         netdev_features_t features);
 754 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 755 void br_manage_promisc(struct net_bridge *br);
 756 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 757
 758 /* br_input.c */
 759 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 760 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 761
 762 struct br_frame_type {
 763         __be16                  type;
 764         int                     (*frame_handler)(struct net_bridge_port *port,
 765                                                  struct sk_buff *skb);
 766         struct hlist_node       list;
 767 };
 768
 769 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 770 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 771
 772 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 773 {
 774         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 775 }
 776
 777 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 778 {
 779         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 780 }
 781
 782 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 783 {
 784         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 785 }
 786
 787 static inline struct net_bridge_port *
 788 br_port_get_check_rtnl(const struct net_device *dev)
 789 {
 790         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 791 }
 792
 793 /* br_ioctl.c */
 794 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 795 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 796                              void __user *arg);
 797
 798 /* br_multicast.c */
 799 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 800 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 801                      struct sk_buff *skb, u16 vid);
 802 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 803                                         struct sk_buff *skb, u16 vid);
 804 int br_multicast_add_port(struct net_bridge_port *port);
 805 void br_multicast_del_port(struct net_bridge_port *port);
 806 void br_multicast_enable_port(struct net_bridge_port *port);
 807 void br_multicast_disable_port(struct net_bridge_port *port);
 808 void br_multicast_init(struct net_bridge *br);
 809 void br_multicast_open(struct net_bridge *br);
 810 void br_multicast_stop(struct net_bridge *br);
 811 void br_multicast_dev_del(struct net_bridge *br);
 812 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 813                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 814 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 815 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 816 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 817 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 818 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 819 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 820 #if IS_ENABLED(CONFIG_IPV6)
 821 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 822 #endif
 823 struct net_bridge_mdb_entry *
 824 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 825 struct net_bridge_mdb_entry *
 826 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 827 struct net_bridge_port_group *
 828 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 829                             struct net_bridge_port_group __rcu *next,
 830                             unsigned char flags, const unsigned char *src,
 831                             u8 filter_mode, u8 rt_protocol);
 832 int br_mdb_hash_init(struct net_bridge *br);
 833 void br_mdb_hash_fini(struct net_bridge *br);
 834 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 835                    struct net_bridge_port_group *pg, int type);
 836 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 837                    int type);
 838 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 839                          struct net_bridge_port_group *pg,
 840                          struct net_bridge_port_group __rcu **pp);
 841 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 842                         const struct sk_buff *skb, u8 type, u8 dir);
 843 int br_multicast_init_stats(struct net_bridge *br);
 844 void br_multicast_uninit_stats(struct net_bridge *br);
 845 void br_multicast_get_stats(const struct net_bridge *br,
 846                             const struct net_bridge_port *p,
 847                             struct br_mcast_stats *dest);
 848 void br_mdb_init(void);
 849 void br_mdb_uninit(void);
 850 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 851 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 852 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 853                                      u8 filter_mode);
 854 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 855                                        struct net_bridge_port_group *sg);
 856
 857 #define mlock_dereference(X, br) \
 858         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 859
 860 static inline bool br_multicast_is_router(struct net_bridge *br)
 861 {
 862         return br->multicast_router == 2 ||
 863                (br->multicast_router == 1 &&
 864                 timer_pending(&br->multicast_router_timer));
 865 }
 866
 867 static inline bool
 868 __br_multicast_querier_exists(struct net_bridge *br,
 869                                 struct bridge_mcast_other_query *querier,
 870                                 const bool is_ipv6)
 871 {
 872         bool own_querier_enabled;
 873
 874         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 875                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 876                         own_querier_enabled = false;
 877                 else
 878                         own_querier_enabled = true;
 879         } else {
 880                 own_querier_enabled = false;
 881         }
 882
 883         return time_is_before_jiffies(querier->delay_time) &&
 884                (own_querier_enabled || timer_pending(&querier->timer));
 885 }
 886
 887 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 888                                                struct ethhdr *eth)
 889 {
 890         switch (eth->h_proto) {
 891         case (htons(ETH_P_IP)):
 892                 return __br_multicast_querier_exists(br,
 893                         &br->ip4_other_query, false);
 894 #if IS_ENABLED(CONFIG_IPV6)
 895         case (htons(ETH_P_IPV6)):
 896                 return __br_multicast_querier_exists(br,
 897                         &br->ip6_other_query, true);
 898 #endif
 899         default:
 900                 return false;
 901         }
 902 }
 903
 904 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
 905 {
 906         switch (ip->proto) {
 907         case htons(ETH_P_IP):
 908                 return ipv4_is_zeronet(ip->src.ip4);
 909 #if IS_ENABLED(CONFIG_IPV6)
 910         case htons(ETH_P_IPV6):
 911                 return ipv6_addr_any(&ip->src.ip6);
 912 #endif
 913         default:
 914                 return false;
 915         }
 916 }
 917
 918 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
 919                                                    __be16 proto)
 920 {
 921         switch (proto) {
 922         case htons(ETH_P_IP):
 923                 return !!(br->multicast_igmp_version == 3);
 924 #if IS_ENABLED(CONFIG_IPV6)
 925         case htons(ETH_P_IPV6):
 926                 return !!(br->multicast_mld_version == 2);
 927 #endif
 928         default:
 929                 return false;
 930         }
 931 }
 932
 933 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 934 {
 935         return BR_INPUT_SKB_CB(skb)->igmp;
 936 }
 937
 938 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
 939 {
 940         return br->multicast_last_member_interval *
 941                br->multicast_last_member_count;
 942 }
 943
 944 static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
 945 {
 946         /* use the RFC default of 2 for QRV */
 947         return 2 * br->multicast_query_interval +
 948                br->multicast_query_response_interval;
 949 }
 950 #else
 951 static inline int br_multicast_rcv(struct net_bridge *br,
 952                                    struct net_bridge_port *port,
 953                                    struct sk_buff *skb,
 954                                    u16 vid)
 955 {
 956         return 0;
 957 }
 958
 959 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 960                                                       struct sk_buff *skb, u16 vid)
 961 {
 962         return NULL;
 963 }
 964
 965 static inline int br_multicast_add_port(struct net_bridge_port *port)
 966 {
 967         return 0;
 968 }
 969
 970 static inline void br_multicast_del_port(struct net_bridge_port *port)
 971 {
 972 }
 973
 974 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 975 {
 976 }
 977
 978 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 979 {
 980 }
 981
 982 static inline void br_multicast_init(struct net_bridge *br)
 983 {
 984 }
 985
 986 static inline void br_multicast_open(struct net_bridge *br)
 987 {
 988 }
 989
 990 static inline void br_multicast_stop(struct net_bridge *br)
 991 {
 992 }
 993
 994 static inline void br_multicast_dev_del(struct net_bridge *br)
 995 {
 996 }
 997
 998 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 999                                       struct sk_buff *skb,
1000                                       bool local_rcv, bool local_orig)
1001 {
1002 }
1003
1004 static inline bool br_multicast_is_router(struct net_bridge *br)
1005 {
1006         return false;
1007 }
1008
1009 static inline bool br_multicast_querier_exists(struct net_bridge *br,
1010                                                struct ethhdr *eth)
1011 {
1012         return false;
1013 }
1014
1015 static inline void br_mdb_init(void)
1016 {
1017 }
1018
1019 static inline void br_mdb_uninit(void)
1020 {
1021 }
1022
1023 static inline int br_mdb_hash_init(struct net_bridge *br)
1024 {
1025         return 0;
1026 }
1027
1028 static inline void br_mdb_hash_fini(struct net_bridge *br)
1029 {
1030 }
1031
1032 static inline void br_multicast_count(struct net_bridge *br,
1033                                       const struct net_bridge_port *p,
1034                                       const struct sk_buff *skb,
1035                                       u8 type, u8 dir)
1036 {
1037 }
1038
1039 static inline int br_multicast_init_stats(struct net_bridge *br)
1040 {
1041         return 0;
1042 }
1043
1044 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1045 {
1046 }
1047
1048 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1049 {
1050         return 0;
1051 }
1052 #endif
1053
1054 /* br_vlan.c */
1055 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1056 bool br_allowed_ingress(const struct net_bridge *br,
1057                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1058                         u16 *vid, u8 *state);
1059 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1060                        const struct sk_buff *skb);
1061 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1062 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 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1067                 bool *changed, struct netlink_ext_ack *extack);
1068 int br_vlan_delete(struct net_bridge *br, u16 vid);
1069 void br_vlan_flush(struct net_bridge *br);
1070 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1071 void br_recalculate_fwd_mask(struct net_bridge *br);
1072 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1073 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1074 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
1075 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
1076 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1077 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1078 int br_vlan_init(struct net_bridge *br);
1079 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
1080 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1081                                struct netlink_ext_ack *extack);
1082 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1083                  bool *changed, struct netlink_ext_ack *extack);
1084 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1085 void nbp_vlan_flush(struct net_bridge_port *port);
1086 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1087 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1088 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1089                        struct br_vlan_stats *stats);
1090 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1091 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1092                          void *ptr);
1093 void br_vlan_rtnl_init(void);
1094 void br_vlan_rtnl_uninit(void);
1095 void br_vlan_notify(const struct net_bridge *br,
1096                     const struct net_bridge_port *p,
1097                     u16 vid, u16 vid_range,
1098                     int cmd);
1099 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1100                              const struct net_bridge_vlan *range_end);
1101
1102 static inline struct net_bridge_vlan_group *br_vlan_group(
1103                                         const struct net_bridge *br)
1104 {
1105         return rtnl_dereference(br->vlgrp);
1106 }
1107
1108 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1109                                         const struct net_bridge_port *p)
1110 {
1111         return rtnl_dereference(p->vlgrp);
1112 }
1113
1114 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1115                                         const struct net_bridge *br)
1116 {
1117         return rcu_dereference(br->vlgrp);
1118 }
1119
1120 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1121                                         const struct net_bridge_port *p)
1122 {
1123         return rcu_dereference(p->vlgrp);
1124 }
1125
1126 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1127  * skb, the vlan tag will always be present if the frame was tagged.
1128  */
1129 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1130 {
1131         int err = 0;
1132
1133         if (skb_vlan_tag_present(skb)) {
1134                 *vid = skb_vlan_tag_get_id(skb);
1135         } else {
1136                 *vid = 0;
1137                 err = -EINVAL;
1138         }
1139
1140         return err;
1141 }
1142
1143 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1144 {
1145         if (!vg)
1146                 return 0;
1147
1148         smp_rmb();
1149         return vg->pvid;
1150 }
1151
1152 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1153 {
1154         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1155 }
1156 #else
1157 static inline bool br_allowed_ingress(const struct net_bridge *br,
1158                                       struct net_bridge_vlan_group *vg,
1159                                       struct sk_buff *skb,
1160                                       u16 *vid, u8 *state)
1161 {
1162         return true;
1163 }
1164
1165 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1166                                      const struct sk_buff *skb)
1167 {
1168         return true;
1169 }
1170
1171 static inline bool br_should_learn(struct net_bridge_port *p,
1172                                    struct sk_buff *skb, u16 *vid)
1173 {
1174         return true;
1175 }
1176
1177 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1178                                              const struct net_bridge_port *port,
1179                                              struct net_bridge_vlan_group *vg,
1180                                              struct sk_buff *skb)
1181 {
1182         return skb;
1183 }
1184
1185 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1186                               bool *changed, struct netlink_ext_ack *extack)
1187 {
1188         *changed = false;
1189         return -EOPNOTSUPP;
1190 }
1191
1192 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1193 {
1194         return -EOPNOTSUPP;
1195 }
1196
1197 static inline void br_vlan_flush(struct net_bridge *br)
1198 {
1199 }
1200
1201 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1202 {
1203 }
1204
1205 static inline int br_vlan_init(struct net_bridge *br)
1206 {
1207         return 0;
1208 }
1209
1210 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1211                                bool *changed, struct netlink_ext_ack *extack)
1212 {
1213         *changed = false;
1214         return -EOPNOTSUPP;
1215 }
1216
1217 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1218 {
1219         return -EOPNOTSUPP;
1220 }
1221
1222 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1223 {
1224 }
1225
1226 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1227                                                    u16 vid)
1228 {
1229         return NULL;
1230 }
1231
1232 static inline int nbp_vlan_init(struct net_bridge_port *port,
1233                                 struct netlink_ext_ack *extack)
1234 {
1235         return 0;
1236 }
1237
1238 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1239 {
1240         return 0;
1241 }
1242
1243 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1244 {
1245         return 0;
1246 }
1247
1248 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1249                                           unsigned long val)
1250 {
1251         return -EOPNOTSUPP;
1252 }
1253
1254 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1255                                          u32 filter_mask)
1256 {
1257         return 0;
1258 }
1259
1260 static inline struct net_bridge_vlan_group *br_vlan_group(
1261                                         const struct net_bridge *br)
1262 {
1263         return NULL;
1264 }
1265
1266 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1267                                         const struct net_bridge_port *p)
1268 {
1269         return NULL;
1270 }
1271
1272 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1273                                         const struct net_bridge *br)
1274 {
1275         return NULL;
1276 }
1277
1278 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1279                                         const struct net_bridge_port *p)
1280 {
1281         return NULL;
1282 }
1283
1284 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1285                                      struct br_vlan_stats *stats)
1286 {
1287 }
1288
1289 static inline void br_vlan_port_event(struct net_bridge_port *p,
1290                                       unsigned long event)
1291 {
1292 }
1293
1294 static inline int br_vlan_bridge_event(struct net_device *dev,
1295                                        unsigned long event, void *ptr)
1296 {
1297         return 0;
1298 }
1299
1300 static inline void br_vlan_rtnl_init(void)
1301 {
1302 }
1303
1304 static inline void br_vlan_rtnl_uninit(void)
1305 {
1306 }
1307
1308 static inline void br_vlan_notify(const struct net_bridge *br,
1309                                   const struct net_bridge_port *p,
1310                                   u16 vid, u16 vid_range,
1311                                   int cmd)
1312 {
1313 }
1314
1315 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1316                                            const struct net_bridge_vlan *range_end)
1317 {
1318         return true;
1319 }
1320 #endif
1321
1322 /* br_vlan_options.c */
1323 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1324 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1325                            const struct net_bridge_vlan *range_end);
1326 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1327 size_t br_vlan_opts_nl_size(void);
1328 int br_vlan_process_options(const struct net_bridge *br,
1329                             const struct net_bridge_port *p,
1330                             struct net_bridge_vlan *range_start,
1331                             struct net_bridge_vlan *range_end,
1332                             struct nlattr **tb,
1333                             struct netlink_ext_ack *extack);
1334
1335 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1336 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1337 {
1338         return READ_ONCE(v->state);
1339 }
1340
1341 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1342 {
1343         WRITE_ONCE(v->state, state);
1344 }
1345
1346 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1347 {
1348         return READ_ONCE(vg->pvid_state);
1349 }
1350
1351 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1352                                           u8 state)
1353 {
1354         WRITE_ONCE(vg->pvid_state, state);
1355 }
1356
1357 /* learn_allow is true at ingress and false at egress */
1358 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1359 {
1360         switch (state) {
1361         case BR_STATE_LEARNING:
1362                 return learn_allow;
1363         case BR_STATE_FORWARDING:
1364                 return true;
1365         default:
1366                 return false;
1367         }
1368 }
1369 #endif
1370
1371 struct nf_br_ops {
1372         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1373 };
1374 extern const struct nf_br_ops __rcu *nf_br_ops;
1375
1376 /* br_netfilter.c */
1377 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1378 int br_nf_core_init(void);
1379 void br_nf_core_fini(void);
1380 void br_netfilter_rtable_init(struct net_bridge *);
1381 #else
1382 static inline int br_nf_core_init(void) { return 0; }
1383 static inline void br_nf_core_fini(void) {}
1384 #define br_netfilter_rtable_init(x)
1385 #endif
1386
1387 /* br_stp.c */
1388 void br_set_state(struct net_bridge_port *p, unsigned int state);
1389 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1390 void br_init_port(struct net_bridge_port *p);
1391 void br_become_designated_port(struct net_bridge_port *p);
1392
1393 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1394 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1395 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1396 int br_set_max_age(struct net_bridge *br, unsigned long x);
1397 int __set_ageing_time(struct net_device *dev, unsigned long t);
1398 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1399
1400
1401 /* br_stp_if.c */
1402 void br_stp_enable_bridge(struct net_bridge *br);
1403 void br_stp_disable_bridge(struct net_bridge *br);
1404 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1405                        struct netlink_ext_ack *extack);
1406 void br_stp_enable_port(struct net_bridge_port *p);
1407 void br_stp_disable_port(struct net_bridge_port *p);
1408 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1409 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1410 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1411 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1412 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1413 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1414
1415 /* br_stp_bpdu.c */
1416 struct stp_proto;
1417 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1418                 struct net_device *dev);
1419
1420 /* br_stp_timer.c */
1421 void br_stp_timer_init(struct net_bridge *br);
1422 void br_stp_port_timer_init(struct net_bridge_port *p);
1423 unsigned long br_timer_value(const struct timer_list *timer);
1424
1425 /* br.c */
1426 #if IS_ENABLED(CONFIG_ATM_LANE)
1427 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1428 #endif
1429
1430 /* br_mrp.c */
1431 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1432 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1433                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1434 bool br_mrp_enabled(struct net_bridge *br);
1435 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1436 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1437 #else
1438 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1439                                struct nlattr *attr, int cmd,
1440                                struct netlink_ext_ack *extack)
1441 {
1442         return -EOPNOTSUPP;
1443 }
1444
1445 static inline bool br_mrp_enabled(struct net_bridge *br)
1446 {
1447         return false;
1448 }
1449
1450 static inline void br_mrp_port_del(struct net_bridge *br,
1451                                    struct net_bridge_port *p)
1452 {
1453 }
1454
1455 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1456 {
1457         return 0;
1458 }
1459
1460 #endif
1461
1462 /* br_cfm.c */
1463 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1464 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1465                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1466 bool br_cfm_created(struct net_bridge *br);
1467 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1468 #else
1469 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1470                                struct nlattr *attr, int cmd,
1471                                struct netlink_ext_ack *extack)
1472 {
1473         return -EOPNOTSUPP;
1474 }
1475
1476 static inline bool br_cfm_created(struct net_bridge *br)
1477 {
1478         return false;
1479 }
1480
1481 static inline void br_cfm_port_del(struct net_bridge *br,
1482                                    struct net_bridge_port *p)
1483 {
1484 }
1485 #endif
1486
1487 /* br_netlink.c */
1488 extern struct rtnl_link_ops br_link_ops;
1489 int br_netlink_init(void);
1490 void br_netlink_fini(void);
1491 void br_ifinfo_notify(int event, const struct net_bridge *br,
1492                       const struct net_bridge_port *port);
1493 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1494                struct netlink_ext_ack *extack);
1495 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1496 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1497                u32 filter_mask, int nlflags);
1498 int br_process_vlan_info(struct net_bridge *br,
1499                          struct net_bridge_port *p, int cmd,
1500                          struct bridge_vlan_info *vinfo_curr,
1501                          struct bridge_vlan_info **vinfo_last,
1502                          bool *changed,
1503                          struct netlink_ext_ack *extack);
1504
1505 #ifdef CONFIG_SYSFS
1506 /* br_sysfs_if.c */
1507 extern const struct sysfs_ops brport_sysfs_ops;
1508 int br_sysfs_addif(struct net_bridge_port *p);
1509 int br_sysfs_renameif(struct net_bridge_port *p);
1510
1511 /* br_sysfs_br.c */
1512 int br_sysfs_addbr(struct net_device *dev);
1513 void br_sysfs_delbr(struct net_device *dev);
1514
1515 #else
1516
1517 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1518 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1519 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1520 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1521 #endif /* CONFIG_SYSFS */
1522
1523 /* br_switchdev.c */
1524 #ifdef CONFIG_NET_SWITCHDEV
1525 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1526 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1527                               struct sk_buff *skb);
1528 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1529                                   const struct sk_buff *skb);
1530 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1531                                unsigned long flags,
1532                                unsigned long mask);
1533 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1534                              int type);
1535 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1536                                struct netlink_ext_ack *extack);
1537 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1538
1539 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1540 {
1541         skb->offload_fwd_mark = 0;
1542 }
1543 #else
1544 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1545 {
1546         return 0;
1547 }
1548
1549 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1550                                             struct sk_buff *skb)
1551 {
1552 }
1553
1554 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1555                                                 const struct sk_buff *skb)
1556 {
1557         return true;
1558 }
1559
1560 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1561                                              unsigned long flags,
1562                                              unsigned long mask)
1563 {
1564         return 0;
1565 }
1566
1567 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1568                                              u16 vid, u16 flags,
1569                                              struct netlink_ext_ack *extack)
1570 {
1571         return -EOPNOTSUPP;
1572 }
1573
1574 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1575 {
1576         return -EOPNOTSUPP;
1577 }
1578
1579 static inline void
1580 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1581 {
1582 }
1583
1584 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1585 {
1586 }
1587 #endif /* CONFIG_NET_SWITCHDEV */
1588
1589 /* br_arp_nd_proxy.c */
1590 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1591 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1592                               u16 vid, struct net_bridge_port *p);
1593 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1594                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1595 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1596 #endif