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         unsigned long                   options;
 381         /* These fields are accessed on each packet */
 382 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 383         __be16                          vlan_proto;
 384         u16                             default_pvid;
 385         struct net_bridge_vlan_group    __rcu *vlgrp;
 386 #endif
 387
 388         struct rhashtable               fdb_hash_tbl;
 389         struct list_head                port_list;
 390 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 391         union {
 392                 struct rtable           fake_rtable;
 393                 struct rt6_info         fake_rt6_info;
 394         };
 395 #endif
 396         u16                             group_fwd_mask;
 397         u16                             group_fwd_mask_required;
 398
 399         /* STP */
 400         bridge_id                       designated_root;
 401         bridge_id                       bridge_id;
 402         unsigned char                   topology_change;
 403         unsigned char                   topology_change_detected;
 404         u16                             root_port;
 405         unsigned long                   max_age;
 406         unsigned long                   hello_time;
 407         unsigned long                   forward_delay;
 408         unsigned long                   ageing_time;
 409         unsigned long                   bridge_max_age;
 410         unsigned long                   bridge_hello_time;
 411         unsigned long                   bridge_forward_delay;
 412         unsigned long                   bridge_ageing_time;
 413         u32                             root_path_cost;
 414
 415         u8                              group_addr[ETH_ALEN];
 416
 417         enum {
 418                 BR_NO_STP,              /* no spanning tree */
 419                 BR_KERNEL_STP,          /* old STP in kernel */
 420                 BR_USER_STP,            /* new RSTP in userspace */
 421         } stp_enabled;
 422
 423 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 424
 425         u32                             hash_max;
 426
 427         u32                             multicast_last_member_count;
 428         u32                             multicast_startup_query_count;
 429
 430         u8                              multicast_igmp_version;
 431         u8                              multicast_router;
 432 #if IS_ENABLED(CONFIG_IPV6)
 433         u8                              multicast_mld_version;
 434 #endif
 435         spinlock_t                      multicast_lock;
 436         unsigned long                   multicast_last_member_interval;
 437         unsigned long                   multicast_membership_interval;
 438         unsigned long                   multicast_querier_interval;
 439         unsigned long                   multicast_query_interval;
 440         unsigned long                   multicast_query_response_interval;
 441         unsigned long                   multicast_startup_query_interval;
 442
 443         struct rhashtable               mdb_hash_tbl;
 444         struct rhashtable               sg_port_tbl;
 445
 446         struct hlist_head               mcast_gc_list;
 447         struct hlist_head               mdb_list;
 448         struct hlist_head               router_list;
 449
 450         struct timer_list               multicast_router_timer;
 451         struct bridge_mcast_other_query ip4_other_query;
 452         struct bridge_mcast_own_query   ip4_own_query;
 453         struct bridge_mcast_querier     ip4_querier;
 454         struct bridge_mcast_stats       __percpu *mcast_stats;
 455 #if IS_ENABLED(CONFIG_IPV6)
 456         struct bridge_mcast_other_query ip6_other_query;
 457         struct bridge_mcast_own_query   ip6_own_query;
 458         struct bridge_mcast_querier     ip6_querier;
 459 #endif /* IS_ENABLED(CONFIG_IPV6) */
 460         struct work_struct              mcast_gc_work;
 461 #endif
 462
 463         struct timer_list               hello_timer;
 464         struct timer_list               tcn_timer;
 465         struct timer_list               topology_change_timer;
 466         struct delayed_work             gc_work;
 467         struct kobject                  *ifobj;
 468         u32                             auto_cnt;
 469
 470 #ifdef CONFIG_NET_SWITCHDEV
 471         int offload_fwd_mark;
 472 #endif
 473         struct hlist_head               fdb_list;
 474
 475 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 476         struct hlist_head               mrp_list;
 477 #endif
 478 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 479         struct hlist_head               mep_list;
 480 #endif
 481 };
 482
 483 struct br_input_skb_cb {
 484         struct net_device *brdev;
 485
 486         u16 frag_max_size;
 487 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 488         u8 igmp;
 489         u8 mrouters_only:1;
 490 #endif
 491         u8 proxyarp_replied:1;
 492         u8 src_port_isolated:1;
 493 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 494         u8 vlan_filtered:1;
 495 #endif
 496 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 497         u8 br_netfilter_broute:1;
 498 #endif
 499
 500 #ifdef CONFIG_NET_SWITCHDEV
 501         int offload_fwd_mark;
 502 #endif
 503 };
 504
 505 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 506
 507 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 508 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 509 #else
 510 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 511 #endif
 512
 513 #define br_printk(level, br, format, args...)   \
 514         printk(level "%s: " format, (br)->dev->name, ##args)
 515
 516 #define br_err(__br, format, args...)                   \
 517         br_printk(KERN_ERR, __br, format, ##args)
 518 #define br_warn(__br, format, args...)                  \
 519         br_printk(KERN_WARNING, __br, format, ##args)
 520 #define br_notice(__br, format, args...)                \
 521         br_printk(KERN_NOTICE, __br, format, ##args)
 522 #define br_info(__br, format, args...)                  \
 523         br_printk(KERN_INFO, __br, format, ##args)
 524
 525 #define br_debug(br, format, args...)                   \
 526         pr_debug("%s: " format,  (br)->dev->name, ##args)
 527
 528 /* called under bridge lock */
 529 static inline int br_is_root_bridge(const struct net_bridge *br)
 530 {
 531         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 532 }
 533
 534 /* check if a VLAN entry is global */
 535 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 536 {
 537         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 538 }
 539
 540 /* check if a VLAN entry is used by the bridge */
 541 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 542 {
 543         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 544 }
 545
 546 /* check if we should use the vlan entry, returns false if it's only context */
 547 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 548 {
 549         if (br_vlan_is_master(v)) {
 550                 if (br_vlan_is_brentry(v))
 551                         return true;
 552                 else
 553                         return false;
 554         }
 555
 556         return true;
 557 }
 558
 559 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 560 {
 561         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 562 }
 563
 564 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 565 {
 566         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 567
 568         if (!ret)
 569                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 570
 571         return ret;
 572 }
 573
 574 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 575                                        const struct bridge_vlan_info *last,
 576                                        struct netlink_ext_ack *extack)
 577 {
 578         /* pvid flag is not allowed in ranges */
 579         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 580                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 581                 return false;
 582         }
 583
 584         /* when cur is the range end, check if:
 585          *  - it has range start flag
 586          *  - range ids are invalid (end is equal to or before start)
 587          */
 588         if (last) {
 589                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 590                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 591                         return false;
 592                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 593                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 594                         return false;
 595                 } else if (cur->vid <= last->vid) {
 596                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 597                         return false;
 598                 }
 599         }
 600
 601         /* check for required range flags */
 602         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 603                             BRIDGE_VLAN_INFO_RANGE_END))) {
 604                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 605                 return false;
 606         }
 607
 608         return true;
 609 }
 610
 611 static inline int br_afspec_cmd_to_rtm(int cmd)
 612 {
 613         switch (cmd) {
 614         case RTM_SETLINK:
 615                 return RTM_NEWVLAN;
 616         case RTM_DELLINK:
 617                 return RTM_DELVLAN;
 618         }
 619
 620         return 0;
 621 }
 622
 623 static inline int br_opt_get(const struct net_bridge *br,
 624                              enum net_bridge_opts opt)
 625 {
 626         return test_bit(opt, &br->options);
 627 }
 628
 629 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 630                       struct netlink_ext_ack *extack);
 631 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 632 int br_boolopt_multi_toggle(struct net_bridge *br,
 633                             struct br_boolopt_multi *bm,
 634                             struct netlink_ext_ack *extack);
 635 void br_boolopt_multi_get(const struct net_bridge *br,
 636                           struct br_boolopt_multi *bm);
 637 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 638
 639 /* br_device.c */
 640 void br_dev_setup(struct net_device *dev);
 641 void br_dev_delete(struct net_device *dev, struct list_head *list);
 642 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 643 #ifdef CONFIG_NET_POLL_CONTROLLER
 644 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 645                                        struct sk_buff *skb)
 646 {
 647         netpoll_send_skb(p->np, skb);
 648 }
 649
 650 int br_netpoll_enable(struct net_bridge_port *p);
 651 void br_netpoll_disable(struct net_bridge_port *p);
 652 #else
 653 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 654                                        struct sk_buff *skb)
 655 {
 656 }
 657
 658 static inline int br_netpoll_enable(struct net_bridge_port *p)
 659 {
 660         return 0;
 661 }
 662
 663 static inline void br_netpoll_disable(struct net_bridge_port *p)
 664 {
 665 }
 666 #endif
 667
 668 /* br_fdb.c */
 669 int br_fdb_init(void);
 670 void br_fdb_fini(void);
 671 int br_fdb_hash_init(struct net_bridge *br);
 672 void br_fdb_hash_fini(struct net_bridge *br);
 673 void br_fdb_flush(struct net_bridge *br);
 674 void br_fdb_find_delete_local(struct net_bridge *br,
 675                               const struct net_bridge_port *p,
 676                               const unsigned char *addr, u16 vid);
 677 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 678 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 679 void br_fdb_cleanup(struct work_struct *work);
 680 void br_fdb_delete_by_port(struct net_bridge *br,
 681                            const struct net_bridge_port *p, u16 vid, int do_all);
 682 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 683                                              const unsigned char *addr,
 684                                              __u16 vid);
 685 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 686 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 687                    unsigned long off);
 688 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 689                   const unsigned char *addr, u16 vid);
 690 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 691                    const unsigned char *addr, u16 vid, unsigned long flags);
 692
 693 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 694                   struct net_device *dev, const unsigned char *addr, u16 vid);
 695 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 696                const unsigned char *addr, u16 vid, u16 nlh_flags,
 697                struct netlink_ext_ack *extack);
 698 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 699                 struct net_device *dev, struct net_device *fdev, int *idx);
 700 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 701                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 702                struct netlink_ext_ack *extack);
 703 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 704 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 705 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 706                               const unsigned char *addr, u16 vid,
 707                               bool swdev_notify);
 708 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 709                               const unsigned char *addr, u16 vid,
 710                               bool swdev_notify);
 711 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 712                           const unsigned char *addr, u16 vid, bool offloaded);
 713
 714 /* br_forward.c */
 715 enum br_pkt_type {
 716         BR_PKT_UNICAST,
 717         BR_PKT_MULTICAST,
 718         BR_PKT_BROADCAST
 719 };
 720 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 721 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 722                 bool local_rcv, bool local_orig);
 723 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 724 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 725               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 726
 727 /* return true if both source port and dest port are isolated */
 728 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 729                                    const struct sk_buff *skb)
 730 {
 731         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 732                (to->flags & BR_ISOLATED);
 733 }
 734
 735 /* br_if.c */
 736 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 737 int br_add_bridge(struct net *net, const char *name);
 738 int br_del_bridge(struct net *net, const char *name);
 739 int br_add_if(struct net_bridge *br, struct net_device *dev,
 740               struct netlink_ext_ack *extack);
 741 int br_del_if(struct net_bridge *br, struct net_device *dev);
 742 void br_mtu_auto_adjust(struct net_bridge *br);
 743 netdev_features_t br_features_recompute(struct net_bridge *br,
 744                                         netdev_features_t features);
 745 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 746 void br_manage_promisc(struct net_bridge *br);
 747 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 748
 749 /* br_input.c */
 750 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 751 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 752
 753 struct br_frame_type {
 754         __be16                  type;
 755         int                     (*frame_handler)(struct net_bridge_port *port,
 756                                                  struct sk_buff *skb);
 757         struct hlist_node       list;
 758 };
 759
 760 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 761 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 762
 763 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 764 {
 765         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 766 }
 767
 768 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 769 {
 770         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 771 }
 772
 773 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 774 {
 775         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 776 }
 777
 778 static inline struct net_bridge_port *
 779 br_port_get_check_rtnl(const struct net_device *dev)
 780 {
 781         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 782 }
 783
 784 /* br_ioctl.c */
 785 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 786 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 787                              void __user *arg);
 788
 789 /* br_multicast.c */
 790 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 791 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 792                      struct sk_buff *skb, u16 vid);
 793 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 794                                         struct sk_buff *skb, u16 vid);
 795 int br_multicast_add_port(struct net_bridge_port *port);
 796 void br_multicast_del_port(struct net_bridge_port *port);
 797 void br_multicast_enable_port(struct net_bridge_port *port);
 798 void br_multicast_disable_port(struct net_bridge_port *port);
 799 void br_multicast_init(struct net_bridge *br);
 800 void br_multicast_join_snoopers(struct net_bridge *br);
 801 void br_multicast_leave_snoopers(struct net_bridge *br);
 802 void br_multicast_open(struct net_bridge *br);
 803 void br_multicast_stop(struct net_bridge *br);
 804 void br_multicast_dev_del(struct net_bridge *br);
 805 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 806                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 807 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 808 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 809 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 810 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 811 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 812 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 813 #if IS_ENABLED(CONFIG_IPV6)
 814 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 815 #endif
 816 struct net_bridge_mdb_entry *
 817 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 818 struct net_bridge_mdb_entry *
 819 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 820 struct net_bridge_port_group *
 821 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 822                             struct net_bridge_port_group __rcu *next,
 823                             unsigned char flags, const unsigned char *src,
 824                             u8 filter_mode, u8 rt_protocol);
 825 int br_mdb_hash_init(struct net_bridge *br);
 826 void br_mdb_hash_fini(struct net_bridge *br);
 827 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 828                    struct net_bridge_port_group *pg, int type);
 829 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 830                    int type);
 831 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 832                          struct net_bridge_port_group *pg,
 833                          struct net_bridge_port_group __rcu **pp);
 834 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 835                         const struct sk_buff *skb, u8 type, u8 dir);
 836 int br_multicast_init_stats(struct net_bridge *br);
 837 void br_multicast_uninit_stats(struct net_bridge *br);
 838 void br_multicast_get_stats(const struct net_bridge *br,
 839                             const struct net_bridge_port *p,
 840                             struct br_mcast_stats *dest);
 841 void br_mdb_init(void);
 842 void br_mdb_uninit(void);
 843 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 844 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 845 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 846                                      u8 filter_mode);
 847 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 848                                        struct net_bridge_port_group *sg);
 849
 850 static inline bool br_group_is_l2(const struct br_ip *group)
 851 {
 852         return group->proto == 0;
 853 }
 854
 855 #define mlock_dereference(X, br) \
 856         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 857
 858 static inline bool br_multicast_is_router(struct net_bridge *br)
 859 {
 860         return br->multicast_router == 2 ||
 861                (br->multicast_router == 1 &&
 862                 timer_pending(&br->multicast_router_timer));
 863 }
 864
 865 static inline bool
 866 __br_multicast_querier_exists(struct net_bridge *br,
 867                                 struct bridge_mcast_other_query *querier,
 868                                 const bool is_ipv6)
 869 {
 870         bool own_querier_enabled;
 871
 872         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 873                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 874                         own_querier_enabled = false;
 875                 else
 876                         own_querier_enabled = true;
 877         } else {
 878                 own_querier_enabled = false;
 879         }
 880
 881         return time_is_before_jiffies(querier->delay_time) &&
 882                (own_querier_enabled || timer_pending(&querier->timer));
 883 }
 884
 885 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 886                                                struct ethhdr *eth,
 887                                                const struct net_bridge_mdb_entry *mdb)
 888 {
 889         switch (eth->h_proto) {
 890         case (htons(ETH_P_IP)):
 891                 return __br_multicast_querier_exists(br,
 892                         &br->ip4_other_query, false);
 893 #if IS_ENABLED(CONFIG_IPV6)
 894         case (htons(ETH_P_IPV6)):
 895                 return __br_multicast_querier_exists(br,
 896                         &br->ip6_other_query, true);
 897 #endif
 898         default:
 899                 return !!mdb && br_group_is_l2(&mdb->addr);
 900         }
 901 }
 902
 903 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
 904 {
 905         switch (ip->proto) {
 906         case htons(ETH_P_IP):
 907                 return ipv4_is_zeronet(ip->src.ip4);
 908 #if IS_ENABLED(CONFIG_IPV6)
 909         case htons(ETH_P_IPV6):
 910                 return ipv6_addr_any(&ip->src.ip6);
 911 #endif
 912         default:
 913                 return false;
 914         }
 915 }
 916
 917 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
 918                                                    __be16 proto)
 919 {
 920         switch (proto) {
 921         case htons(ETH_P_IP):
 922                 return !!(br->multicast_igmp_version == 3);
 923 #if IS_ENABLED(CONFIG_IPV6)
 924         case htons(ETH_P_IPV6):
 925                 return !!(br->multicast_mld_version == 2);
 926 #endif
 927         default:
 928                 return false;
 929         }
 930 }
 931
 932 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 933 {
 934         return BR_INPUT_SKB_CB(skb)->igmp;
 935 }
 936
 937 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
 938 {
 939         return br->multicast_last_member_interval *
 940                br->multicast_last_member_count;
 941 }
 942
 943 static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
 944 {
 945         /* use the RFC default of 2 for QRV */
 946         return 2 * br->multicast_query_interval +
 947                br->multicast_query_response_interval;
 948 }
 949 #else
 950 static inline int br_multicast_rcv(struct net_bridge *br,
 951                                    struct net_bridge_port *port,
 952                                    struct sk_buff *skb,
 953                                    u16 vid)
 954 {
 955         return 0;
 956 }
 957
 958 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 959                                                       struct sk_buff *skb, u16 vid)
 960 {
 961         return NULL;
 962 }
 963
 964 static inline int br_multicast_add_port(struct net_bridge_port *port)
 965 {
 966         return 0;
 967 }
 968
 969 static inline void br_multicast_del_port(struct net_bridge_port *port)
 970 {
 971 }
 972
 973 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 974 {
 975 }
 976
 977 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 978 {
 979 }
 980
 981 static inline void br_multicast_init(struct net_bridge *br)
 982 {
 983 }
 984
 985 static inline void br_multicast_join_snoopers(struct net_bridge *br)
 986 {
 987 }
 988
 989 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
 990 {
 991 }
 992
 993 static inline void br_multicast_open(struct net_bridge *br)
 994 {
 995 }
 996
 997 static inline void br_multicast_stop(struct net_bridge *br)
 998 {
 999 }
1000
1001 static inline void br_multicast_dev_del(struct net_bridge *br)
1002 {
1003 }
1004
1005 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1006                                       struct sk_buff *skb,
1007                                       bool local_rcv, bool local_orig)
1008 {
1009 }
1010
1011 static inline bool br_multicast_is_router(struct net_bridge *br)
1012 {
1013         return false;
1014 }
1015
1016 static inline bool br_multicast_querier_exists(struct net_bridge *br,
1017                                                struct ethhdr *eth,
1018                                                const struct net_bridge_mdb_entry *mdb)
1019 {
1020         return false;
1021 }
1022
1023 static inline void br_mdb_init(void)
1024 {
1025 }
1026
1027 static inline void br_mdb_uninit(void)
1028 {
1029 }
1030
1031 static inline int br_mdb_hash_init(struct net_bridge *br)
1032 {
1033         return 0;
1034 }
1035
1036 static inline void br_mdb_hash_fini(struct net_bridge *br)
1037 {
1038 }
1039
1040 static inline void br_multicast_count(struct net_bridge *br,
1041                                       const struct net_bridge_port *p,
1042                                       const struct sk_buff *skb,
1043                                       u8 type, u8 dir)
1044 {
1045 }
1046
1047 static inline int br_multicast_init_stats(struct net_bridge *br)
1048 {
1049         return 0;
1050 }
1051
1052 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1053 {
1054 }
1055
1056 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1057 {
1058         return 0;
1059 }
1060 #endif
1061
1062 /* br_vlan.c */
1063 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1064 bool br_allowed_ingress(const struct net_bridge *br,
1065                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1066                         u16 *vid, u8 *state);
1067 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1068                        const struct sk_buff *skb);
1069 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1070 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1071                                const struct net_bridge_port *port,
1072                                struct net_bridge_vlan_group *vg,
1073                                struct sk_buff *skb);
1074 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1075                 bool *changed, struct netlink_ext_ack *extack);
1076 int br_vlan_delete(struct net_bridge *br, u16 vid);
1077 void br_vlan_flush(struct net_bridge *br);
1078 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1079 void br_recalculate_fwd_mask(struct net_bridge *br);
1080 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1081 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
1082 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
1083 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
1084 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1085 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1086 int br_vlan_init(struct net_bridge *br);
1087 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
1088 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1089                                struct netlink_ext_ack *extack);
1090 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1091                  bool *changed, struct netlink_ext_ack *extack);
1092 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1093 void nbp_vlan_flush(struct net_bridge_port *port);
1094 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1095 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1096 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1097                        struct pcpu_sw_netstats *stats);
1098 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1099 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1100                          void *ptr);
1101 void br_vlan_rtnl_init(void);
1102 void br_vlan_rtnl_uninit(void);
1103 void br_vlan_notify(const struct net_bridge *br,
1104                     const struct net_bridge_port *p,
1105                     u16 vid, u16 vid_range,
1106                     int cmd);
1107 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1108                              const struct net_bridge_vlan *range_end);
1109
1110 static inline struct net_bridge_vlan_group *br_vlan_group(
1111                                         const struct net_bridge *br)
1112 {
1113         return rtnl_dereference(br->vlgrp);
1114 }
1115
1116 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1117                                         const struct net_bridge_port *p)
1118 {
1119         return rtnl_dereference(p->vlgrp);
1120 }
1121
1122 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1123                                         const struct net_bridge *br)
1124 {
1125         return rcu_dereference(br->vlgrp);
1126 }
1127
1128 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1129                                         const struct net_bridge_port *p)
1130 {
1131         return rcu_dereference(p->vlgrp);
1132 }
1133
1134 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1135  * skb, the vlan tag will always be present if the frame was tagged.
1136  */
1137 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1138 {
1139         int err = 0;
1140
1141         if (skb_vlan_tag_present(skb)) {
1142                 *vid = skb_vlan_tag_get_id(skb);
1143         } else {
1144                 *vid = 0;
1145                 err = -EINVAL;
1146         }
1147
1148         return err;
1149 }
1150
1151 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1152 {
1153         if (!vg)
1154                 return 0;
1155
1156         smp_rmb();
1157         return vg->pvid;
1158 }
1159
1160 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1161 {
1162         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1163 }
1164 #else
1165 static inline bool br_allowed_ingress(const struct net_bridge *br,
1166                                       struct net_bridge_vlan_group *vg,
1167                                       struct sk_buff *skb,
1168                                       u16 *vid, u8 *state)
1169 {
1170         return true;
1171 }
1172
1173 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1174                                      const struct sk_buff *skb)
1175 {
1176         return true;
1177 }
1178
1179 static inline bool br_should_learn(struct net_bridge_port *p,
1180                                    struct sk_buff *skb, u16 *vid)
1181 {
1182         return true;
1183 }
1184
1185 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1186                                              const struct net_bridge_port *port,
1187                                              struct net_bridge_vlan_group *vg,
1188                                              struct sk_buff *skb)
1189 {
1190         return skb;
1191 }
1192
1193 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1194                               bool *changed, struct netlink_ext_ack *extack)
1195 {
1196         *changed = false;
1197         return -EOPNOTSUPP;
1198 }
1199
1200 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1201 {
1202         return -EOPNOTSUPP;
1203 }
1204
1205 static inline void br_vlan_flush(struct net_bridge *br)
1206 {
1207 }
1208
1209 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1210 {
1211 }
1212
1213 static inline int br_vlan_init(struct net_bridge *br)
1214 {
1215         return 0;
1216 }
1217
1218 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1219                                bool *changed, struct netlink_ext_ack *extack)
1220 {
1221         *changed = false;
1222         return -EOPNOTSUPP;
1223 }
1224
1225 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1226 {
1227         return -EOPNOTSUPP;
1228 }
1229
1230 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1231 {
1232 }
1233
1234 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1235                                                    u16 vid)
1236 {
1237         return NULL;
1238 }
1239
1240 static inline int nbp_vlan_init(struct net_bridge_port *port,
1241                                 struct netlink_ext_ack *extack)
1242 {
1243         return 0;
1244 }
1245
1246 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1247 {
1248         return 0;
1249 }
1250
1251 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1252 {
1253         return 0;
1254 }
1255
1256 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1257                                           unsigned long val)
1258 {
1259         return -EOPNOTSUPP;
1260 }
1261
1262 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1263                                          u32 filter_mask)
1264 {
1265         return 0;
1266 }
1267
1268 static inline struct net_bridge_vlan_group *br_vlan_group(
1269                                         const struct net_bridge *br)
1270 {
1271         return NULL;
1272 }
1273
1274 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1275                                         const struct net_bridge_port *p)
1276 {
1277         return NULL;
1278 }
1279
1280 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1281                                         const struct net_bridge *br)
1282 {
1283         return NULL;
1284 }
1285
1286 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1287                                         const struct net_bridge_port *p)
1288 {
1289         return NULL;
1290 }
1291
1292 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1293                                      struct pcpu_sw_netstats *stats)
1294 {
1295 }
1296
1297 static inline void br_vlan_port_event(struct net_bridge_port *p,
1298                                       unsigned long event)
1299 {
1300 }
1301
1302 static inline int br_vlan_bridge_event(struct net_device *dev,
1303                                        unsigned long event, void *ptr)
1304 {
1305         return 0;
1306 }
1307
1308 static inline void br_vlan_rtnl_init(void)
1309 {
1310 }
1311
1312 static inline void br_vlan_rtnl_uninit(void)
1313 {
1314 }
1315
1316 static inline void br_vlan_notify(const struct net_bridge *br,
1317                                   const struct net_bridge_port *p,
1318                                   u16 vid, u16 vid_range,
1319                                   int cmd)
1320 {
1321 }
1322
1323 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1324                                            const struct net_bridge_vlan *range_end)
1325 {
1326         return true;
1327 }
1328 #endif
1329
1330 /* br_vlan_options.c */
1331 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1332 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1333                            const struct net_bridge_vlan *range_end);
1334 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1335 size_t br_vlan_opts_nl_size(void);
1336 int br_vlan_process_options(const struct net_bridge *br,
1337                             const struct net_bridge_port *p,
1338                             struct net_bridge_vlan *range_start,
1339                             struct net_bridge_vlan *range_end,
1340                             struct nlattr **tb,
1341                             struct netlink_ext_ack *extack);
1342
1343 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1344 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1345 {
1346         return READ_ONCE(v->state);
1347 }
1348
1349 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1350 {
1351         WRITE_ONCE(v->state, state);
1352 }
1353
1354 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1355 {
1356         return READ_ONCE(vg->pvid_state);
1357 }
1358
1359 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1360                                           u8 state)
1361 {
1362         WRITE_ONCE(vg->pvid_state, state);
1363 }
1364
1365 /* learn_allow is true at ingress and false at egress */
1366 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1367 {
1368         switch (state) {
1369         case BR_STATE_LEARNING:
1370                 return learn_allow;
1371         case BR_STATE_FORWARDING:
1372                 return true;
1373         default:
1374                 return false;
1375         }
1376 }
1377 #endif
1378
1379 struct nf_br_ops {
1380         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1381 };
1382 extern const struct nf_br_ops __rcu *nf_br_ops;
1383
1384 /* br_netfilter.c */
1385 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1386 int br_nf_core_init(void);
1387 void br_nf_core_fini(void);
1388 void br_netfilter_rtable_init(struct net_bridge *);
1389 #else
1390 static inline int br_nf_core_init(void) { return 0; }
1391 static inline void br_nf_core_fini(void) {}
1392 #define br_netfilter_rtable_init(x)
1393 #endif
1394
1395 /* br_stp.c */
1396 void br_set_state(struct net_bridge_port *p, unsigned int state);
1397 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1398 void br_init_port(struct net_bridge_port *p);
1399 void br_become_designated_port(struct net_bridge_port *p);
1400
1401 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1402 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1403 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1404 int br_set_max_age(struct net_bridge *br, unsigned long x);
1405 int __set_ageing_time(struct net_device *dev, unsigned long t);
1406 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1407
1408
1409 /* br_stp_if.c */
1410 void br_stp_enable_bridge(struct net_bridge *br);
1411 void br_stp_disable_bridge(struct net_bridge *br);
1412 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1413                        struct netlink_ext_ack *extack);
1414 void br_stp_enable_port(struct net_bridge_port *p);
1415 void br_stp_disable_port(struct net_bridge_port *p);
1416 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1417 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1418 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1419 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1420 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1421 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1422
1423 /* br_stp_bpdu.c */
1424 struct stp_proto;
1425 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1426                 struct net_device *dev);
1427
1428 /* br_stp_timer.c */
1429 void br_stp_timer_init(struct net_bridge *br);
1430 void br_stp_port_timer_init(struct net_bridge_port *p);
1431 unsigned long br_timer_value(const struct timer_list *timer);
1432
1433 /* br.c */
1434 #if IS_ENABLED(CONFIG_ATM_LANE)
1435 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1436 #endif
1437
1438 /* br_mrp.c */
1439 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1440 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1441                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1442 bool br_mrp_enabled(struct net_bridge *br);
1443 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1444 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1445 #else
1446 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1447                                struct nlattr *attr, int cmd,
1448                                struct netlink_ext_ack *extack)
1449 {
1450         return -EOPNOTSUPP;
1451 }
1452
1453 static inline bool br_mrp_enabled(struct net_bridge *br)
1454 {
1455         return false;
1456 }
1457
1458 static inline void br_mrp_port_del(struct net_bridge *br,
1459                                    struct net_bridge_port *p)
1460 {
1461 }
1462
1463 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1464 {
1465         return 0;
1466 }
1467
1468 #endif
1469
1470 /* br_cfm.c */
1471 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1472 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1473                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1474 bool br_cfm_created(struct net_bridge *br);
1475 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1476 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1477 int br_cfm_status_fill_info(struct sk_buff *skb,
1478                             struct net_bridge *br,
1479                             bool getlink);
1480 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1481 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1482 #else
1483 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1484                                struct nlattr *attr, int cmd,
1485                                struct netlink_ext_ack *extack)
1486 {
1487         return -EOPNOTSUPP;
1488 }
1489
1490 static inline bool br_cfm_created(struct net_bridge *br)
1491 {
1492         return false;
1493 }
1494
1495 static inline void br_cfm_port_del(struct net_bridge *br,
1496                                    struct net_bridge_port *p)
1497 {
1498 }
1499
1500 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1501 {
1502         return -EOPNOTSUPP;
1503 }
1504
1505 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1506                                           struct net_bridge *br,
1507                                           bool getlink)
1508 {
1509         return -EOPNOTSUPP;
1510 }
1511
1512 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1513 {
1514         return -EOPNOTSUPP;
1515 }
1516
1517 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1518 {
1519         return -EOPNOTSUPP;
1520 }
1521 #endif
1522
1523 /* br_netlink.c */
1524 extern struct rtnl_link_ops br_link_ops;
1525 int br_netlink_init(void);
1526 void br_netlink_fini(void);
1527 void br_ifinfo_notify(int event, const struct net_bridge *br,
1528                       const struct net_bridge_port *port);
1529 void br_info_notify(int event, const struct net_bridge *br,
1530                     const struct net_bridge_port *port, u32 filter);
1531 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1532                struct netlink_ext_ack *extack);
1533 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1534 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1535                u32 filter_mask, int nlflags);
1536 int br_process_vlan_info(struct net_bridge *br,
1537                          struct net_bridge_port *p, int cmd,
1538                          struct bridge_vlan_info *vinfo_curr,
1539                          struct bridge_vlan_info **vinfo_last,
1540                          bool *changed,
1541                          struct netlink_ext_ack *extack);
1542
1543 #ifdef CONFIG_SYSFS
1544 /* br_sysfs_if.c */
1545 extern const struct sysfs_ops brport_sysfs_ops;
1546 int br_sysfs_addif(struct net_bridge_port *p);
1547 int br_sysfs_renameif(struct net_bridge_port *p);
1548
1549 /* br_sysfs_br.c */
1550 int br_sysfs_addbr(struct net_device *dev);
1551 void br_sysfs_delbr(struct net_device *dev);
1552
1553 #else
1554
1555 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1556 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1557 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1558 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1559 #endif /* CONFIG_SYSFS */
1560
1561 /* br_switchdev.c */
1562 #ifdef CONFIG_NET_SWITCHDEV
1563 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1564 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1565                               struct sk_buff *skb);
1566 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1567                                   const struct sk_buff *skb);
1568 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1569                                unsigned long flags,
1570                                unsigned long mask);
1571 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1572                              int type);
1573 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1574                                struct netlink_ext_ack *extack);
1575 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1576
1577 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1578 {
1579         skb->offload_fwd_mark = 0;
1580 }
1581 #else
1582 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1583 {
1584         return 0;
1585 }
1586
1587 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1588                                             struct sk_buff *skb)
1589 {
1590 }
1591
1592 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1593                                                 const struct sk_buff *skb)
1594 {
1595         return true;
1596 }
1597
1598 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1599                                              unsigned long flags,
1600                                              unsigned long mask)
1601 {
1602         return 0;
1603 }
1604
1605 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1606                                              u16 vid, u16 flags,
1607                                              struct netlink_ext_ack *extack)
1608 {
1609         return -EOPNOTSUPP;
1610 }
1611
1612 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1613 {
1614         return -EOPNOTSUPP;
1615 }
1616
1617 static inline void
1618 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1619 {
1620 }
1621
1622 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1623 {
1624 }
1625 #endif /* CONFIG_NET_SWITCHDEV */
1626
1627 /* br_arp_nd_proxy.c */
1628 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1629 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1630                               u16 vid, struct net_bridge_port *p);
1631 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1632                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1633 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1634 #endif