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_tunnel_info {
  93         __be64                  tunnel_id;
  94         struct metadata_dst     *tunnel_dst;
  95 };
  96
  97 /* private vlan flags */
  98 enum {
  99         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 100         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 101 };
 102
 103 /**
 104  * struct net_bridge_vlan - per-vlan entry
 105  *
 106  * @vnode: rhashtable member
 107  * @vid: VLAN id
 108  * @flags: bridge vlan flags
 109  * @priv_flags: private (in-kernel) bridge vlan flags
 110  * @state: STP state (e.g. blocking, learning, forwarding)
 111  * @stats: per-cpu VLAN statistics
 112  * @br: if MASTER flag set, this points to a bridge struct
 113  * @port: if MASTER flag unset, this points to a port struct
 114  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 115  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 116  *          for this VLAN entry
 117  * @vlist: sorted list of VLAN entries
 118  * @rcu: used for entry destruction
 119  *
 120  * This structure is shared between the global per-VLAN entries contained in
 121  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 122  * the port's rhashtable. The union entries should be interpreted depending on
 123  * the entry flags that are set.
 124  */
 125 struct net_bridge_vlan {
 126         struct rhash_head               vnode;
 127         struct rhash_head               tnode;
 128         u16                             vid;
 129         u16                             flags;
 130         u16                             priv_flags;
 131         u8                              state;
 132         struct pcpu_sw_netstats __percpu *stats;
 133         union {
 134                 struct net_bridge       *br;
 135                 struct net_bridge_port  *port;
 136         };
 137         union {
 138                 refcount_t              refcnt;
 139                 struct net_bridge_vlan  *brvlan;
 140         };
 141
 142         struct br_tunnel_info           tinfo;
 143
 144         struct list_head                vlist;
 145
 146         struct rcu_head                 rcu;
 147 };
 148
 149 /**
 150  * struct net_bridge_vlan_group
 151  *
 152  * @vlan_hash: VLAN entry rhashtable
 153  * @vlan_list: sorted VLAN entry list
 154  * @num_vlans: number of total VLAN entries
 155  * @pvid: PVID VLAN id
 156  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 157  *
 158  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 159  *            primitives because the bridge can have entries in its list which
 160  *            are just for global context but not for filtering, i.e. they have
 161  *            the master flag set but not the brentry flag. If you have to check
 162  *            if there're "real" entries in the bridge please test @num_vlans
 163  */
 164 struct net_bridge_vlan_group {
 165         struct rhashtable               vlan_hash;
 166         struct rhashtable               tunnel_hash;
 167         struct list_head                vlan_list;
 168         u16                             num_vlans;
 169         u16                             pvid;
 170         u8                              pvid_state;
 171 };
 172
 173 /* bridge fdb flags */
 174 enum {
 175         BR_FDB_LOCAL,
 176         BR_FDB_STATIC,
 177         BR_FDB_STICKY,
 178         BR_FDB_ADDED_BY_USER,
 179         BR_FDB_ADDED_BY_EXT_LEARN,
 180         BR_FDB_OFFLOADED,
 181         BR_FDB_NOTIFY,
 182         BR_FDB_NOTIFY_INACTIVE
 183 };
 184
 185 struct net_bridge_fdb_key {
 186         mac_addr addr;
 187         u16 vlan_id;
 188 };
 189
 190 struct net_bridge_fdb_entry {
 191         struct rhash_head               rhnode;
 192         struct net_bridge_port          *dst;
 193
 194         struct net_bridge_fdb_key       key;
 195         struct hlist_node               fdb_node;
 196         unsigned long                   flags;
 197
 198         /* write-heavy members should not affect lookups */
 199         unsigned long                   updated ____cacheline_aligned_in_smp;
 200         unsigned long                   used;
 201
 202         struct rcu_head                 rcu;
 203 };
 204
 205 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 206 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 208 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 209 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 210
 211 #define PG_SRC_ENT_LIMIT        32
 212
 213 #define BR_SGRP_F_DELETE        BIT(0)
 214 #define BR_SGRP_F_SEND          BIT(1)
 215 #define BR_SGRP_F_INSTALLED     BIT(2)
 216
 217 struct net_bridge_mcast_gc {
 218         struct hlist_node               gc_node;
 219         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 220 };
 221
 222 struct net_bridge_group_src {
 223         struct hlist_node               node;
 224
 225         struct br_ip                    addr;
 226         struct net_bridge_port_group    *pg;
 227         u8                              flags;
 228         u8                              src_query_rexmit_cnt;
 229         struct timer_list               timer;
 230
 231         struct net_bridge               *br;
 232         struct net_bridge_mcast_gc      mcast_gc;
 233         struct rcu_head                 rcu;
 234 };
 235
 236 struct net_bridge_port_group_sg_key {
 237         struct net_bridge_port          *port;
 238         struct br_ip                    addr;
 239 };
 240
 241 struct net_bridge_port_group {
 242         struct net_bridge_port_group __rcu *next;
 243         struct net_bridge_port_group_sg_key key;
 244         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 245         unsigned char                   flags;
 246         unsigned char                   filter_mode;
 247         unsigned char                   grp_query_rexmit_cnt;
 248         unsigned char                   rt_protocol;
 249
 250         struct hlist_head               src_list;
 251         unsigned int                    src_ents;
 252         struct timer_list               timer;
 253         struct timer_list               rexmit_timer;
 254         struct hlist_node               mglist;
 255
 256         struct rhash_head               rhnode;
 257         struct net_bridge_mcast_gc      mcast_gc;
 258         struct rcu_head                 rcu;
 259 };
 260
 261 struct net_bridge_mdb_entry {
 262         struct rhash_head               rhnode;
 263         struct net_bridge               *br;
 264         struct net_bridge_port_group __rcu *ports;
 265         struct br_ip                    addr;
 266         bool                            host_joined;
 267
 268         struct timer_list               timer;
 269         struct hlist_node               mdb_node;
 270
 271         struct net_bridge_mcast_gc      mcast_gc;
 272         struct rcu_head                 rcu;
 273 };
 274
 275 struct net_bridge_port {
 276         struct net_bridge               *br;
 277         struct net_device               *dev;
 278         struct list_head                list;
 279
 280         unsigned long                   flags;
 281 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 282         struct net_bridge_vlan_group    __rcu *vlgrp;
 283 #endif
 284         struct net_bridge_port          __rcu *backup_port;
 285
 286         /* STP */
 287         u8                              priority;
 288         u8                              state;
 289         u16                             port_no;
 290         unsigned char                   topology_change_ack;
 291         unsigned char                   config_pending;
 292         port_id                         port_id;
 293         port_id                         designated_port;
 294         bridge_id                       designated_root;
 295         bridge_id                       designated_bridge;
 296         u32                             path_cost;
 297         u32                             designated_cost;
 298         unsigned long                   designated_age;
 299
 300         struct timer_list               forward_delay_timer;
 301         struct timer_list               hold_timer;
 302         struct timer_list               message_age_timer;
 303         struct kobject                  kobj;
 304         struct rcu_head                 rcu;
 305
 306 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 307         struct bridge_mcast_own_query   ip4_own_query;
 308 #if IS_ENABLED(CONFIG_IPV6)
 309         struct bridge_mcast_own_query   ip6_own_query;
 310 #endif /* IS_ENABLED(CONFIG_IPV6) */
 311         unsigned char                   multicast_router;
 312         struct bridge_mcast_stats       __percpu *mcast_stats;
 313         struct timer_list               multicast_router_timer;
 314         struct hlist_head               mglist;
 315         struct hlist_node               rlist;
 316 #endif
 317
 318 #ifdef CONFIG_SYSFS
 319         char                            sysfs_name[IFNAMSIZ];
 320 #endif
 321
 322 #ifdef CONFIG_NET_POLL_CONTROLLER
 323         struct netpoll                  *np;
 324 #endif
 325 #ifdef CONFIG_NET_SWITCHDEV
 326         int                             offload_fwd_mark;
 327 #endif
 328         u16                             group_fwd_mask;
 329         u16                             backup_redirected_cnt;
 330
 331         struct bridge_stp_xstats        stp_xstats;
 332 };
 333
 334 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 335
 336 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 337 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 338
 339 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 340 {
 341         return rcu_dereference(dev->rx_handler_data);
 342 }
 343
 344 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 345 {
 346         return netif_is_bridge_port(dev) ?
 347                 rtnl_dereference(dev->rx_handler_data) : NULL;
 348 }
 349
 350 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 351 {
 352         return netif_is_bridge_port(dev) ?
 353                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 354 }
 355
 356 enum net_bridge_opts {
 357         BROPT_VLAN_ENABLED,
 358         BROPT_VLAN_STATS_ENABLED,
 359         BROPT_NF_CALL_IPTABLES,
 360         BROPT_NF_CALL_IP6TABLES,
 361         BROPT_NF_CALL_ARPTABLES,
 362         BROPT_GROUP_ADDR_SET,
 363         BROPT_MULTICAST_ENABLED,
 364         BROPT_MULTICAST_QUERIER,
 365         BROPT_MULTICAST_QUERY_USE_IFADDR,
 366         BROPT_MULTICAST_STATS_ENABLED,
 367         BROPT_HAS_IPV6_ADDR,
 368         BROPT_NEIGH_SUPPRESS_ENABLED,
 369         BROPT_MTU_SET_BY_USER,
 370         BROPT_VLAN_STATS_PER_PORT,
 371         BROPT_NO_LL_LEARN,
 372         BROPT_VLAN_BRIDGE_BINDING,
 373 };
 374
 375 struct net_bridge {
 376         spinlock_t                      lock;
 377         spinlock_t                      hash_lock;
 378         struct hlist_head               frame_type_list;
 379         struct net_device               *dev;
 380         struct pcpu_sw_netstats         __percpu *stats;
 381         unsigned long                   options;
 382         /* These fields are accessed on each packet */
 383 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 384         __be16                          vlan_proto;
 385         u16                             default_pvid;
 386         struct net_bridge_vlan_group    __rcu *vlgrp;
 387 #endif
 388
 389         struct rhashtable               fdb_hash_tbl;
 390         struct list_head                port_list;
 391 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 392         union {
 393                 struct rtable           fake_rtable;
 394                 struct rt6_info         fake_rt6_info;
 395         };
 396 #endif
 397         u16                             group_fwd_mask;
 398         u16                             group_fwd_mask_required;
 399
 400         /* STP */
 401         bridge_id                       designated_root;
 402         bridge_id                       bridge_id;
 403         unsigned char                   topology_change;
 404         unsigned char                   topology_change_detected;
 405         u16                             root_port;
 406         unsigned long                   max_age;
 407         unsigned long                   hello_time;
 408         unsigned long                   forward_delay;
 409         unsigned long                   ageing_time;
 410         unsigned long                   bridge_max_age;
 411         unsigned long                   bridge_hello_time;
 412         unsigned long                   bridge_forward_delay;
 413         unsigned long                   bridge_ageing_time;
 414         u32                             root_path_cost;
 415
 416         u8                              group_addr[ETH_ALEN];
 417
 418         enum {
 419                 BR_NO_STP,              /* no spanning tree */
 420                 BR_KERNEL_STP,          /* old STP in kernel */
 421                 BR_USER_STP,            /* new RSTP in userspace */
 422         } stp_enabled;
 423
 424 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 425
 426         u32                             hash_max;
 427
 428         u32                             multicast_last_member_count;
 429         u32                             multicast_startup_query_count;
 430
 431         u8                              multicast_igmp_version;
 432         u8                              multicast_router;
 433 #if IS_ENABLED(CONFIG_IPV6)
 434         u8                              multicast_mld_version;
 435 #endif
 436         spinlock_t                      multicast_lock;
 437         unsigned long                   multicast_last_member_interval;
 438         unsigned long                   multicast_membership_interval;
 439         unsigned long                   multicast_querier_interval;
 440         unsigned long                   multicast_query_interval;
 441         unsigned long                   multicast_query_response_interval;
 442         unsigned long                   multicast_startup_query_interval;
 443
 444         struct rhashtable               mdb_hash_tbl;
 445         struct rhashtable               sg_port_tbl;
 446
 447         struct hlist_head               mcast_gc_list;
 448         struct hlist_head               mdb_list;
 449         struct hlist_head               router_list;
 450
 451         struct timer_list               multicast_router_timer;
 452         struct bridge_mcast_other_query ip4_other_query;
 453         struct bridge_mcast_own_query   ip4_own_query;
 454         struct bridge_mcast_querier     ip4_querier;
 455         struct bridge_mcast_stats       __percpu *mcast_stats;
 456 #if IS_ENABLED(CONFIG_IPV6)
 457         struct bridge_mcast_other_query ip6_other_query;
 458         struct bridge_mcast_own_query   ip6_own_query;
 459         struct bridge_mcast_querier     ip6_querier;
 460 #endif /* IS_ENABLED(CONFIG_IPV6) */
 461         struct work_struct              mcast_gc_work;
 462 #endif
 463
 464         struct timer_list               hello_timer;
 465         struct timer_list               tcn_timer;
 466         struct timer_list               topology_change_timer;
 467         struct delayed_work             gc_work;
 468         struct kobject                  *ifobj;
 469         u32                             auto_cnt;
 470
 471 #ifdef CONFIG_NET_SWITCHDEV
 472         int offload_fwd_mark;
 473 #endif
 474         struct hlist_head               fdb_list;
 475
 476 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 477         struct hlist_head               mrp_list;
 478 #endif
 479 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 480         struct hlist_head               mep_list;
 481 #endif
 482 };
 483
 484 struct br_input_skb_cb {
 485         struct net_device *brdev;
 486
 487         u16 frag_max_size;
 488 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 489         u8 igmp;
 490         u8 mrouters_only:1;
 491 #endif
 492         u8 proxyarp_replied:1;
 493         u8 src_port_isolated:1;
 494 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 495         u8 vlan_filtered:1;
 496 #endif
 497 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 498         u8 br_netfilter_broute:1;
 499 #endif
 500
 501 #ifdef CONFIG_NET_SWITCHDEV
 502         int offload_fwd_mark;
 503 #endif
 504 };
 505
 506 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 507
 508 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 509 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 510 #else
 511 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 512 #endif
 513
 514 #define br_printk(level, br, format, args...)   \
 515         printk(level "%s: " format, (br)->dev->name, ##args)
 516
 517 #define br_err(__br, format, args...)                   \
 518         br_printk(KERN_ERR, __br, format, ##args)
 519 #define br_warn(__br, format, args...)                  \
 520         br_printk(KERN_WARNING, __br, format, ##args)
 521 #define br_notice(__br, format, args...)                \
 522         br_printk(KERN_NOTICE, __br, format, ##args)
 523 #define br_info(__br, format, args...)                  \
 524         br_printk(KERN_INFO, __br, format, ##args)
 525
 526 #define br_debug(br, format, args...)                   \
 527         pr_debug("%s: " format,  (br)->dev->name, ##args)
 528
 529 /* called under bridge lock */
 530 static inline int br_is_root_bridge(const struct net_bridge *br)
 531 {
 532         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 533 }
 534
 535 /* check if a VLAN entry is global */
 536 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 537 {
 538         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 539 }
 540
 541 /* check if a VLAN entry is used by the bridge */
 542 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 543 {
 544         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 545 }
 546
 547 /* check if we should use the vlan entry, returns false if it's only context */
 548 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 549 {
 550         if (br_vlan_is_master(v)) {
 551                 if (br_vlan_is_brentry(v))
 552                         return true;
 553                 else
 554                         return false;
 555         }
 556
 557         return true;
 558 }
 559
 560 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 561 {
 562         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 563 }
 564
 565 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 566 {
 567         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 568
 569         if (!ret)
 570                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 571
 572         return ret;
 573 }
 574
 575 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 576                                        const struct bridge_vlan_info *last,
 577                                        struct netlink_ext_ack *extack)
 578 {
 579         /* pvid flag is not allowed in ranges */
 580         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 581                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 582                 return false;
 583         }
 584
 585         /* when cur is the range end, check if:
 586          *  - it has range start flag
 587          *  - range ids are invalid (end is equal to or before start)
 588          */
 589         if (last) {
 590                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 591                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 592                         return false;
 593                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 594                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 595                         return false;
 596                 } else if (cur->vid <= last->vid) {
 597                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 598                         return false;
 599                 }
 600         }
 601
 602         /* check for required range flags */
 603         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 604                             BRIDGE_VLAN_INFO_RANGE_END))) {
 605                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 606                 return false;
 607         }
 608
 609         return true;
 610 }
 611
 612 static inline int br_afspec_cmd_to_rtm(int cmd)
 613 {
 614         switch (cmd) {
 615         case RTM_SETLINK:
 616                 return RTM_NEWVLAN;
 617         case RTM_DELLINK:
 618                 return RTM_DELVLAN;
 619         }
 620
 621         return 0;
 622 }
 623
 624 static inline int br_opt_get(const struct net_bridge *br,
 625                              enum net_bridge_opts opt)
 626 {
 627         return test_bit(opt, &br->options);
 628 }
 629
 630 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 631                       struct netlink_ext_ack *extack);
 632 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 633 int br_boolopt_multi_toggle(struct net_bridge *br,
 634                             struct br_boolopt_multi *bm,
 635                             struct netlink_ext_ack *extack);
 636 void br_boolopt_multi_get(const struct net_bridge *br,
 637                           struct br_boolopt_multi *bm);
 638 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 639
 640 /* br_device.c */
 641 void br_dev_setup(struct net_device *dev);
 642 void br_dev_delete(struct net_device *dev, struct list_head *list);
 643 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 644 #ifdef CONFIG_NET_POLL_CONTROLLER
 645 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 646                                        struct sk_buff *skb)
 647 {
 648         netpoll_send_skb(p->np, skb);
 649 }
 650
 651 int br_netpoll_enable(struct net_bridge_port *p);
 652 void br_netpoll_disable(struct net_bridge_port *p);
 653 #else
 654 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 655                                        struct sk_buff *skb)
 656 {
 657 }
 658
 659 static inline int br_netpoll_enable(struct net_bridge_port *p)
 660 {
 661         return 0;
 662 }
 663
 664 static inline void br_netpoll_disable(struct net_bridge_port *p)
 665 {
 666 }
 667 #endif
 668
 669 /* br_fdb.c */
 670 int br_fdb_init(void);
 671 void br_fdb_fini(void);
 672 int br_fdb_hash_init(struct net_bridge *br);
 673 void br_fdb_hash_fini(struct net_bridge *br);
 674 void br_fdb_flush(struct net_bridge *br);
 675 void br_fdb_find_delete_local(struct net_bridge *br,
 676                               const struct net_bridge_port *p,
 677                               const unsigned char *addr, u16 vid);
 678 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 679 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 680 void br_fdb_cleanup(struct work_struct *work);
 681 void br_fdb_delete_by_port(struct net_bridge *br,
 682                            const struct net_bridge_port *p, u16 vid, int do_all);
 683 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 684                                              const unsigned char *addr,
 685                                              __u16 vid);
 686 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 687 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 688                    unsigned long off);
 689 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 690                   const unsigned char *addr, u16 vid);
 691 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 692                    const unsigned char *addr, u16 vid, unsigned long flags);
 693
 694 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 695                   struct net_device *dev, const unsigned char *addr, u16 vid);
 696 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 697                const unsigned char *addr, u16 vid, u16 nlh_flags,
 698                struct netlink_ext_ack *extack);
 699 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 700                 struct net_device *dev, struct net_device *fdev, int *idx);
 701 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 702                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 703                struct netlink_ext_ack *extack);
 704 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 705 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 706 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 707                               const unsigned char *addr, u16 vid,
 708                               bool swdev_notify);
 709 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 710                               const unsigned char *addr, u16 vid,
 711                               bool swdev_notify);
 712 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 713                           const unsigned char *addr, u16 vid, bool offloaded);
 714
 715 /* br_forward.c */
 716 enum br_pkt_type {
 717         BR_PKT_UNICAST,
 718         BR_PKT_MULTICAST,
 719         BR_PKT_BROADCAST
 720 };
 721 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 722 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 723                 bool local_rcv, bool local_orig);
 724 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 725 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 726               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 727
 728 /* return true if both source port and dest port are isolated */
 729 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 730                                    const struct sk_buff *skb)
 731 {
 732         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 733                (to->flags & BR_ISOLATED);
 734 }
 735
 736 /* br_if.c */
 737 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 738 int br_add_bridge(struct net *net, const char *name);
 739 int br_del_bridge(struct net *net, const char *name);
 740 int br_add_if(struct net_bridge *br, struct net_device *dev,
 741               struct netlink_ext_ack *extack);
 742 int br_del_if(struct net_bridge *br, struct net_device *dev);
 743 void br_mtu_auto_adjust(struct net_bridge *br);
 744 netdev_features_t br_features_recompute(struct net_bridge *br,
 745                                         netdev_features_t features);
 746 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 747 void br_manage_promisc(struct net_bridge *br);
 748 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 749
 750 /* br_input.c */
 751 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 752 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 753
 754 struct br_frame_type {
 755         __be16                  type;
 756         int                     (*frame_handler)(struct net_bridge_port *port,
 757                                                  struct sk_buff *skb);
 758         struct hlist_node       list;
 759 };
 760
 761 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 762 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 763
 764 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 765 {
 766         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 767 }
 768
 769 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 770 {
 771         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 772 }
 773
 774 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 775 {
 776         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 777 }
 778
 779 static inline struct net_bridge_port *
 780 br_port_get_check_rtnl(const struct net_device *dev)
 781 {
 782         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 783 }
 784
 785 /* br_ioctl.c */
 786 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 787 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 788                              void __user *arg);
 789
 790 /* br_multicast.c */
 791 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 792 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 793                      struct sk_buff *skb, u16 vid);
 794 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 795                                         struct sk_buff *skb, u16 vid);
 796 int br_multicast_add_port(struct net_bridge_port *port);
 797 void br_multicast_del_port(struct net_bridge_port *port);
 798 void br_multicast_enable_port(struct net_bridge_port *port);
 799 void br_multicast_disable_port(struct net_bridge_port *port);
 800 void br_multicast_init(struct net_bridge *br);
 801 void br_multicast_open(struct net_bridge *br);
 802 void br_multicast_stop(struct net_bridge *br);
 803 void br_multicast_dev_del(struct net_bridge *br);
 804 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 805                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 806 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 807 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 808 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 809 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 810 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 811 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 812 #if IS_ENABLED(CONFIG_IPV6)
 813 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 814 #endif
 815 struct net_bridge_mdb_entry *
 816 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 817 struct net_bridge_mdb_entry *
 818 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 819 struct net_bridge_port_group *
 820 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 821                             struct net_bridge_port_group __rcu *next,
 822                             unsigned char flags, const unsigned char *src,
 823                             u8 filter_mode, u8 rt_protocol);
 824 int br_mdb_hash_init(struct net_bridge *br);
 825 void br_mdb_hash_fini(struct net_bridge *br);
 826 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 827                    struct net_bridge_port_group *pg, int type);
 828 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 829                    int type);
 830 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 831                          struct net_bridge_port_group *pg,
 832                          struct net_bridge_port_group __rcu **pp);
 833 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 834                         const struct sk_buff *skb, u8 type, u8 dir);
 835 int br_multicast_init_stats(struct net_bridge *br);
 836 void br_multicast_uninit_stats(struct net_bridge *br);
 837 void br_multicast_get_stats(const struct net_bridge *br,
 838                             const struct net_bridge_port *p,
 839                             struct br_mcast_stats *dest);
 840 void br_mdb_init(void);
 841 void br_mdb_uninit(void);
 842 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 843 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 844 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 845                                      u8 filter_mode);
 846 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 847                                        struct net_bridge_port_group *sg);
 848
 849 static inline bool br_group_is_l2(const struct br_ip *group)
 850 {
 851         return group->proto == 0;
 852 }
 853
 854 #define mlock_dereference(X, br) \
 855         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 856
 857 static inline bool br_multicast_is_router(struct net_bridge *br)
 858 {
 859         return br->multicast_router == 2 ||
 860                (br->multicast_router == 1 &&
 861                 timer_pending(&br->multicast_router_timer));
 862 }
 863
 864 static inline bool
 865 __br_multicast_querier_exists(struct net_bridge *br,
 866                                 struct bridge_mcast_other_query *querier,
 867                                 const bool is_ipv6)
 868 {
 869         bool own_querier_enabled;
 870
 871         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 872                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 873                         own_querier_enabled = false;
 874                 else
 875                         own_querier_enabled = true;
 876         } else {
 877                 own_querier_enabled = false;
 878         }
 879
 880         return time_is_before_jiffies(querier->delay_time) &&
 881                (own_querier_enabled || timer_pending(&querier->timer));
 882 }
 883
 884 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 885                                                struct ethhdr *eth,
 886                                                const struct net_bridge_mdb_entry *mdb)
 887 {
 888         switch (eth->h_proto) {
 889         case (htons(ETH_P_IP)):
 890                 return __br_multicast_querier_exists(br,
 891                         &br->ip4_other_query, false);
 892 #if IS_ENABLED(CONFIG_IPV6)
 893         case (htons(ETH_P_IPV6)):
 894                 return __br_multicast_querier_exists(br,
 895                         &br->ip6_other_query, true);
 896 #endif
 897         default:
 898                 return !!mdb && br_group_is_l2(&mdb->addr);
 899         }
 900 }
 901
 902 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
 903 {
 904         switch (ip->proto) {
 905         case htons(ETH_P_IP):
 906                 return ipv4_is_zeronet(ip->src.ip4);
 907 #if IS_ENABLED(CONFIG_IPV6)
 908         case htons(ETH_P_IPV6):
 909                 return ipv6_addr_any(&ip->src.ip6);
 910 #endif
 911         default:
 912                 return false;
 913         }
 914 }
 915
 916 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
 917                                                    __be16 proto)
 918 {
 919         switch (proto) {
 920         case htons(ETH_P_IP):
 921                 return !!(br->multicast_igmp_version == 3);
 922 #if IS_ENABLED(CONFIG_IPV6)
 923         case htons(ETH_P_IPV6):
 924                 return !!(br->multicast_mld_version == 2);
 925 #endif
 926         default:
 927                 return false;
 928         }
 929 }
 930
 931 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 932 {
 933         return BR_INPUT_SKB_CB(skb)->igmp;
 934 }
 935
 936 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
 937 {
 938         return br->multicast_last_member_interval *
 939                br->multicast_last_member_count;
 940 }
 941
 942 static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
 943 {
 944         /* use the RFC default of 2 for QRV */
 945         return 2 * br->multicast_query_interval +
 946                br->multicast_query_response_interval;
 947 }
 948 #else
 949 static inline int br_multicast_rcv(struct net_bridge *br,
 950                                    struct net_bridge_port *port,
 951                                    struct sk_buff *skb,
 952                                    u16 vid)
 953 {
 954         return 0;
 955 }
 956
 957 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 958                                                       struct sk_buff *skb, u16 vid)
 959 {
 960         return NULL;
 961 }
 962
 963 static inline int br_multicast_add_port(struct net_bridge_port *port)
 964 {
 965         return 0;
 966 }
 967
 968 static inline void br_multicast_del_port(struct net_bridge_port *port)
 969 {
 970 }
 971
 972 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 973 {
 974 }
 975
 976 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 977 {
 978 }
 979
 980 static inline void br_multicast_init(struct net_bridge *br)
 981 {
 982 }
 983
 984 static inline void br_multicast_open(struct net_bridge *br)
 985 {
 986 }
 987
 988 static inline void br_multicast_stop(struct net_bridge *br)
 989 {
 990 }
 991
 992 static inline void br_multicast_dev_del(struct net_bridge *br)
 993 {
 994 }
 995
 996 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 997                                       struct sk_buff *skb,
 998                                       bool local_rcv, bool local_orig)
 999 {
1000 }
1001
1002 static inline bool br_multicast_is_router(struct net_bridge *br)
1003 {
1004         return false;
1005 }
1006
1007 static inline bool br_multicast_querier_exists(struct net_bridge *br,
1008                                                struct ethhdr *eth,
1009                                                const struct net_bridge_mdb_entry *mdb)
1010 {
1011         return false;
1012 }
1013
1014 static inline void br_mdb_init(void)
1015 {
1016 }
1017
1018 static inline void br_mdb_uninit(void)
1019 {
1020 }
1021
1022 static inline int br_mdb_hash_init(struct net_bridge *br)
1023 {
1024         return 0;
1025 }
1026
1027 static inline void br_mdb_hash_fini(struct net_bridge *br)
1028 {
1029 }
1030
1031 static inline void br_multicast_count(struct net_bridge *br,
1032                                       const struct net_bridge_port *p,
1033                                       const struct sk_buff *skb,
1034                                       u8 type, u8 dir)
1035 {
1036 }
1037
1038 static inline int br_multicast_init_stats(struct net_bridge *br)
1039 {
1040         return 0;
1041 }
1042
1043 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1044 {
1045 }
1046
1047 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1048 {
1049         return 0;
1050 }
1051 #endif
1052
1053 /* br_vlan.c */
1054 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1055 bool br_allowed_ingress(const struct net_bridge *br,
1056                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1057                         u16 *vid, u8 *state);
1058 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1059                        const struct sk_buff *skb);
1060 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1061 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1062                                const struct net_bridge_port *port,
1063                                struct net_bridge_vlan_group *vg,
1064                                struct sk_buff *skb);
1065 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1066                 bool *changed, struct netlink_ext_ack *extack);
1067 int br_vlan_delete(struct net_bridge *br, u16 vid);
1068 void br_vlan_flush(struct net_bridge *br);
1069 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1070 void br_recalculate_fwd_mask(struct net_bridge *br);
1071 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1072 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1073 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
1074 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
1075 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1076 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1077 int br_vlan_init(struct net_bridge *br);
1078 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
1079 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1080                                struct netlink_ext_ack *extack);
1081 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1082                  bool *changed, struct netlink_ext_ack *extack);
1083 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1084 void nbp_vlan_flush(struct net_bridge_port *port);
1085 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1086 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1087 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1088                        struct pcpu_sw_netstats *stats);
1089 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1090 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1091                          void *ptr);
1092 void br_vlan_rtnl_init(void);
1093 void br_vlan_rtnl_uninit(void);
1094 void br_vlan_notify(const struct net_bridge *br,
1095                     const struct net_bridge_port *p,
1096                     u16 vid, u16 vid_range,
1097                     int cmd);
1098 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1099                              const struct net_bridge_vlan *range_end);
1100
1101 static inline struct net_bridge_vlan_group *br_vlan_group(
1102                                         const struct net_bridge *br)
1103 {
1104         return rtnl_dereference(br->vlgrp);
1105 }
1106
1107 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1108                                         const struct net_bridge_port *p)
1109 {
1110         return rtnl_dereference(p->vlgrp);
1111 }
1112
1113 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1114                                         const struct net_bridge *br)
1115 {
1116         return rcu_dereference(br->vlgrp);
1117 }
1118
1119 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1120                                         const struct net_bridge_port *p)
1121 {
1122         return rcu_dereference(p->vlgrp);
1123 }
1124
1125 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1126  * skb, the vlan tag will always be present if the frame was tagged.
1127  */
1128 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1129 {
1130         int err = 0;
1131
1132         if (skb_vlan_tag_present(skb)) {
1133                 *vid = skb_vlan_tag_get_id(skb);
1134         } else {
1135                 *vid = 0;
1136                 err = -EINVAL;
1137         }
1138
1139         return err;
1140 }
1141
1142 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1143 {
1144         if (!vg)
1145                 return 0;
1146
1147         smp_rmb();
1148         return vg->pvid;
1149 }
1150
1151 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1152 {
1153         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1154 }
1155 #else
1156 static inline bool br_allowed_ingress(const struct net_bridge *br,
1157                                       struct net_bridge_vlan_group *vg,
1158                                       struct sk_buff *skb,
1159                                       u16 *vid, u8 *state)
1160 {
1161         return true;
1162 }
1163
1164 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1165                                      const struct sk_buff *skb)
1166 {
1167         return true;
1168 }
1169
1170 static inline bool br_should_learn(struct net_bridge_port *p,
1171                                    struct sk_buff *skb, u16 *vid)
1172 {
1173         return true;
1174 }
1175
1176 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1177                                              const struct net_bridge_port *port,
1178                                              struct net_bridge_vlan_group *vg,
1179                                              struct sk_buff *skb)
1180 {
1181         return skb;
1182 }
1183
1184 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1185                               bool *changed, struct netlink_ext_ack *extack)
1186 {
1187         *changed = false;
1188         return -EOPNOTSUPP;
1189 }
1190
1191 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1192 {
1193         return -EOPNOTSUPP;
1194 }
1195
1196 static inline void br_vlan_flush(struct net_bridge *br)
1197 {
1198 }
1199
1200 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1201 {
1202 }
1203
1204 static inline int br_vlan_init(struct net_bridge *br)
1205 {
1206         return 0;
1207 }
1208
1209 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1210                                bool *changed, struct netlink_ext_ack *extack)
1211 {
1212         *changed = false;
1213         return -EOPNOTSUPP;
1214 }
1215
1216 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1217 {
1218         return -EOPNOTSUPP;
1219 }
1220
1221 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1222 {
1223 }
1224
1225 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1226                                                    u16 vid)
1227 {
1228         return NULL;
1229 }
1230
1231 static inline int nbp_vlan_init(struct net_bridge_port *port,
1232                                 struct netlink_ext_ack *extack)
1233 {
1234         return 0;
1235 }
1236
1237 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1238 {
1239         return 0;
1240 }
1241
1242 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1243 {
1244         return 0;
1245 }
1246
1247 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1248                                           unsigned long val)
1249 {
1250         return -EOPNOTSUPP;
1251 }
1252
1253 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1254                                          u32 filter_mask)
1255 {
1256         return 0;
1257 }
1258
1259 static inline struct net_bridge_vlan_group *br_vlan_group(
1260                                         const struct net_bridge *br)
1261 {
1262         return NULL;
1263 }
1264
1265 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1266                                         const struct net_bridge_port *p)
1267 {
1268         return NULL;
1269 }
1270
1271 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1272                                         const struct net_bridge *br)
1273 {
1274         return NULL;
1275 }
1276
1277 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1278                                         const struct net_bridge_port *p)
1279 {
1280         return NULL;
1281 }
1282
1283 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1284                                      struct pcpu_sw_netstats *stats)
1285 {
1286 }
1287
1288 static inline void br_vlan_port_event(struct net_bridge_port *p,
1289                                       unsigned long event)
1290 {
1291 }
1292
1293 static inline int br_vlan_bridge_event(struct net_device *dev,
1294                                        unsigned long event, void *ptr)
1295 {
1296         return 0;
1297 }
1298
1299 static inline void br_vlan_rtnl_init(void)
1300 {
1301 }
1302
1303 static inline void br_vlan_rtnl_uninit(void)
1304 {
1305 }
1306
1307 static inline void br_vlan_notify(const struct net_bridge *br,
1308                                   const struct net_bridge_port *p,
1309                                   u16 vid, u16 vid_range,
1310                                   int cmd)
1311 {
1312 }
1313
1314 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1315                                            const struct net_bridge_vlan *range_end)
1316 {
1317         return true;
1318 }
1319 #endif
1320
1321 /* br_vlan_options.c */
1322 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1323 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1324                            const struct net_bridge_vlan *range_end);
1325 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1326 size_t br_vlan_opts_nl_size(void);
1327 int br_vlan_process_options(const struct net_bridge *br,
1328                             const struct net_bridge_port *p,
1329                             struct net_bridge_vlan *range_start,
1330                             struct net_bridge_vlan *range_end,
1331                             struct nlattr **tb,
1332                             struct netlink_ext_ack *extack);
1333
1334 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1335 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1336 {
1337         return READ_ONCE(v->state);
1338 }
1339
1340 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1341 {
1342         WRITE_ONCE(v->state, state);
1343 }
1344
1345 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1346 {
1347         return READ_ONCE(vg->pvid_state);
1348 }
1349
1350 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1351                                           u8 state)
1352 {
1353         WRITE_ONCE(vg->pvid_state, state);
1354 }
1355
1356 /* learn_allow is true at ingress and false at egress */
1357 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1358 {
1359         switch (state) {
1360         case BR_STATE_LEARNING:
1361                 return learn_allow;
1362         case BR_STATE_FORWARDING:
1363                 return true;
1364         default:
1365                 return false;
1366         }
1367 }
1368 #endif
1369
1370 struct nf_br_ops {
1371         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1372 };
1373 extern const struct nf_br_ops __rcu *nf_br_ops;
1374
1375 /* br_netfilter.c */
1376 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1377 int br_nf_core_init(void);
1378 void br_nf_core_fini(void);
1379 void br_netfilter_rtable_init(struct net_bridge *);
1380 #else
1381 static inline int br_nf_core_init(void) { return 0; }
1382 static inline void br_nf_core_fini(void) {}
1383 #define br_netfilter_rtable_init(x)
1384 #endif
1385
1386 /* br_stp.c */
1387 void br_set_state(struct net_bridge_port *p, unsigned int state);
1388 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1389 void br_init_port(struct net_bridge_port *p);
1390 void br_become_designated_port(struct net_bridge_port *p);
1391
1392 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1393 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1394 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1395 int br_set_max_age(struct net_bridge *br, unsigned long x);
1396 int __set_ageing_time(struct net_device *dev, unsigned long t);
1397 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1398
1399
1400 /* br_stp_if.c */
1401 void br_stp_enable_bridge(struct net_bridge *br);
1402 void br_stp_disable_bridge(struct net_bridge *br);
1403 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1404                        struct netlink_ext_ack *extack);
1405 void br_stp_enable_port(struct net_bridge_port *p);
1406 void br_stp_disable_port(struct net_bridge_port *p);
1407 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1408 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1409 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1410 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1411 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1412 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1413
1414 /* br_stp_bpdu.c */
1415 struct stp_proto;
1416 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1417                 struct net_device *dev);
1418
1419 /* br_stp_timer.c */
1420 void br_stp_timer_init(struct net_bridge *br);
1421 void br_stp_port_timer_init(struct net_bridge_port *p);
1422 unsigned long br_timer_value(const struct timer_list *timer);
1423
1424 /* br.c */
1425 #if IS_ENABLED(CONFIG_ATM_LANE)
1426 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1427 #endif
1428
1429 /* br_mrp.c */
1430 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1431 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1432                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1433 bool br_mrp_enabled(struct net_bridge *br);
1434 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1435 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1436 #else
1437 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1438                                struct nlattr *attr, int cmd,
1439                                struct netlink_ext_ack *extack)
1440 {
1441         return -EOPNOTSUPP;
1442 }
1443
1444 static inline bool br_mrp_enabled(struct net_bridge *br)
1445 {
1446         return false;
1447 }
1448
1449 static inline void br_mrp_port_del(struct net_bridge *br,
1450                                    struct net_bridge_port *p)
1451 {
1452 }
1453
1454 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1455 {
1456         return 0;
1457 }
1458
1459 #endif
1460
1461 /* br_cfm.c */
1462 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1463 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1464                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1465 bool br_cfm_created(struct net_bridge *br);
1466 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1467 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1468 int br_cfm_status_fill_info(struct sk_buff *skb,
1469                             struct net_bridge *br,
1470                             bool getlink);
1471 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1472 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1473 #else
1474 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1475                                struct nlattr *attr, int cmd,
1476                                struct netlink_ext_ack *extack)
1477 {
1478         return -EOPNOTSUPP;
1479 }
1480
1481 static inline bool br_cfm_created(struct net_bridge *br)
1482 {
1483         return false;
1484 }
1485
1486 static inline void br_cfm_port_del(struct net_bridge *br,
1487                                    struct net_bridge_port *p)
1488 {
1489 }
1490
1491 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1492 {
1493         return -EOPNOTSUPP;
1494 }
1495
1496 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1497                                           struct net_bridge *br,
1498                                           bool getlink)
1499 {
1500         return -EOPNOTSUPP;
1501 }
1502
1503 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1504 {
1505         return -EOPNOTSUPP;
1506 }
1507
1508 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1509 {
1510         return -EOPNOTSUPP;
1511 }
1512 #endif
1513
1514 /* br_netlink.c */
1515 extern struct rtnl_link_ops br_link_ops;
1516 int br_netlink_init(void);
1517 void br_netlink_fini(void);
1518 void br_ifinfo_notify(int event, const struct net_bridge *br,
1519                       const struct net_bridge_port *port);
1520 void br_info_notify(int event, const struct net_bridge *br,
1521                     const struct net_bridge_port *port, u32 filter);
1522 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1523                struct netlink_ext_ack *extack);
1524 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1525 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1526                u32 filter_mask, int nlflags);
1527 int br_process_vlan_info(struct net_bridge *br,
1528                          struct net_bridge_port *p, int cmd,
1529                          struct bridge_vlan_info *vinfo_curr,
1530                          struct bridge_vlan_info **vinfo_last,
1531                          bool *changed,
1532                          struct netlink_ext_ack *extack);
1533
1534 #ifdef CONFIG_SYSFS
1535 /* br_sysfs_if.c */
1536 extern const struct sysfs_ops brport_sysfs_ops;
1537 int br_sysfs_addif(struct net_bridge_port *p);
1538 int br_sysfs_renameif(struct net_bridge_port *p);
1539
1540 /* br_sysfs_br.c */
1541 int br_sysfs_addbr(struct net_device *dev);
1542 void br_sysfs_delbr(struct net_device *dev);
1543
1544 #else
1545
1546 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1547 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1548 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1549 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1550 #endif /* CONFIG_SYSFS */
1551
1552 /* br_switchdev.c */
1553 #ifdef CONFIG_NET_SWITCHDEV
1554 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1555 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1556                               struct sk_buff *skb);
1557 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1558                                   const struct sk_buff *skb);
1559 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1560                                unsigned long flags,
1561                                unsigned long mask);
1562 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1563                              int type);
1564 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1565                                struct netlink_ext_ack *extack);
1566 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1567
1568 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1569 {
1570         skb->offload_fwd_mark = 0;
1571 }
1572 #else
1573 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1574 {
1575         return 0;
1576 }
1577
1578 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1579                                             struct sk_buff *skb)
1580 {
1581 }
1582
1583 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1584                                                 const struct sk_buff *skb)
1585 {
1586         return true;
1587 }
1588
1589 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1590                                              unsigned long flags,
1591                                              unsigned long mask)
1592 {
1593         return 0;
1594 }
1595
1596 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1597                                              u16 vid, u16 flags,
1598                                              struct netlink_ext_ack *extack)
1599 {
1600         return -EOPNOTSUPP;
1601 }
1602
1603 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1604 {
1605         return -EOPNOTSUPP;
1606 }
1607
1608 static inline void
1609 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1610 {
1611 }
1612
1613 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1614 {
1615 }
1616 #endif /* CONFIG_NET_SWITCHDEV */
1617
1618 /* br_arp_nd_proxy.c */
1619 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1620 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1621                               u16 vid, struct net_bridge_port *p);
1622 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1623                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1624 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1625 #endif