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 <net/pkt_cls.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/rhashtable.h>
  21 #include <linux/refcount.h>
  22
  23 #define BR_HASH_BITS 8
  24 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  25
  26 #define BR_HOLD_TIME (1*HZ)
  27
  28 #define BR_PORT_BITS    10
  29 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  30
  31 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  32 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
  33 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
  34
  35 #define BR_HWDOM_MAX BITS_PER_LONG
  36
  37 #define BR_VERSION      "2.3"
  38
  39 /* Control of forwarding link local multicast */
  40 #define BR_GROUPFWD_DEFAULT     0
  41 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  42 enum {
  43         BR_GROUPFWD_STP         = BIT(0),
  44         BR_GROUPFWD_MACPAUSE    = BIT(1),
  45         BR_GROUPFWD_LACP        = BIT(2),
  46 };
  47
  48 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  49                                 BR_GROUPFWD_LACP)
  50 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  51 #define BR_GROUPFWD_8021AD      0xB801u
  52
  53 /* Path to usermode spanning tree program */
  54 #define BR_STP_PROG     "/sbin/bridge-stp"
  55
  56 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  57
  58 typedef struct bridge_id bridge_id;
  59 typedef struct mac_addr mac_addr;
  60 typedef __u16 port_id;
  61
  62 struct bridge_id {
  63         unsigned char   prio[2];
  64         unsigned char   addr[ETH_ALEN];
  65 };
  66
  67 struct mac_addr {
  68         unsigned char   addr[ETH_ALEN];
  69 };
  70
  71 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  72 /* our own querier */
  73 struct bridge_mcast_own_query {
  74         struct timer_list       timer;
  75         u32                     startup_sent;
  76 };
  77
  78 /* other querier */
  79 struct bridge_mcast_other_query {
  80         struct timer_list               timer;
  81         unsigned long                   delay_time;
  82 };
  83
  84 /* selected querier */
  85 struct bridge_mcast_querier {
  86         struct br_ip addr;
  87         int port_ifidx;
  88         seqcount_spinlock_t seq;
  89 };
  90
  91 /* IGMP/MLD statistics */
  92 struct bridge_mcast_stats {
  93         struct br_mcast_stats mstats;
  94         struct u64_stats_sync syncp;
  95 };
  96
  97 struct br_mdb_src_entry {
  98         struct br_ip                    addr;
  99 };
 100
 101 struct br_mdb_config {
 102         struct net_bridge               *br;
 103         struct net_bridge_port          *p;
 104         struct br_mdb_entry             *entry;
 105         struct br_ip                    group;
 106         bool                            src_entry;
 107         u8                              filter_mode;
 108         u16                             nlflags;
 109         struct br_mdb_src_entry         *src_entries;
 110         int                             num_src_entries;
 111         u8                              rt_protocol;
 112 };
 113 #endif
 114
 115 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
 116 struct net_bridge_mcast_port {
 117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 118         struct net_bridge_port          *port;
 119         struct net_bridge_vlan          *vlan;
 120
 121         struct bridge_mcast_own_query   ip4_own_query;
 122         struct timer_list               ip4_mc_router_timer;
 123         struct hlist_node               ip4_rlist;
 124 #if IS_ENABLED(CONFIG_IPV6)
 125         struct bridge_mcast_own_query   ip6_own_query;
 126         struct timer_list               ip6_mc_router_timer;
 127         struct hlist_node               ip6_rlist;
 128 #endif /* IS_ENABLED(CONFIG_IPV6) */
 129         unsigned char                   multicast_router;
 130         u32                             mdb_n_entries;
 131         u32                             mdb_max_entries;
 132 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 133 };
 134
 135 /* net_bridge_mcast must be always defined due to forwarding stubs */
 136 struct net_bridge_mcast {
 137 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 138         struct net_bridge               *br;
 139         struct net_bridge_vlan          *vlan;
 140
 141         u32                             multicast_last_member_count;
 142         u32                             multicast_startup_query_count;
 143
 144         u8                              multicast_querier;
 145         u8                              multicast_igmp_version;
 146         u8                              multicast_router;
 147 #if IS_ENABLED(CONFIG_IPV6)
 148         u8                              multicast_mld_version;
 149 #endif
 150         unsigned long                   multicast_last_member_interval;
 151         unsigned long                   multicast_membership_interval;
 152         unsigned long                   multicast_querier_interval;
 153         unsigned long                   multicast_query_interval;
 154         unsigned long                   multicast_query_response_interval;
 155         unsigned long                   multicast_startup_query_interval;
 156         struct hlist_head               ip4_mc_router_list;
 157         struct timer_list               ip4_mc_router_timer;
 158         struct bridge_mcast_other_query ip4_other_query;
 159         struct bridge_mcast_own_query   ip4_own_query;
 160         struct bridge_mcast_querier     ip4_querier;
 161 #if IS_ENABLED(CONFIG_IPV6)
 162         struct hlist_head               ip6_mc_router_list;
 163         struct timer_list               ip6_mc_router_timer;
 164         struct bridge_mcast_other_query ip6_other_query;
 165         struct bridge_mcast_own_query   ip6_own_query;
 166         struct bridge_mcast_querier     ip6_querier;
 167 #endif /* IS_ENABLED(CONFIG_IPV6) */
 168 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 169 };
 170
 171 struct br_tunnel_info {
 172         __be64                          tunnel_id;
 173         struct metadata_dst __rcu       *tunnel_dst;
 174 };
 175
 176 /* private vlan flags */
 177 enum {
 178         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 179         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 180         BR_VLFLAG_MCAST_ENABLED = BIT(2),
 181         BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
 182         BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
 183 };
 184
 185 /**
 186  * struct net_bridge_vlan - per-vlan entry
 187  *
 188  * @vnode: rhashtable member
 189  * @vid: VLAN id
 190  * @flags: bridge vlan flags
 191  * @priv_flags: private (in-kernel) bridge vlan flags
 192  * @state: STP state (e.g. blocking, learning, forwarding)
 193  * @stats: per-cpu VLAN statistics
 194  * @br: if MASTER flag set, this points to a bridge struct
 195  * @port: if MASTER flag unset, this points to a port struct
 196  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 197  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 198  *          for this VLAN entry
 199  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
 200  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
 201  *                  context
 202  * @msti: if MASTER flag set, this holds the VLANs MST instance
 203  * @vlist: sorted list of VLAN entries
 204  * @rcu: used for entry destruction
 205  *
 206  * This structure is shared between the global per-VLAN entries contained in
 207  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 208  * the port's rhashtable. The union entries should be interpreted depending on
 209  * the entry flags that are set.
 210  */
 211 struct net_bridge_vlan {
 212         struct rhash_head               vnode;
 213         struct rhash_head               tnode;
 214         u16                             vid;
 215         u16                             flags;
 216         u16                             priv_flags;
 217         u8                              state;
 218         struct pcpu_sw_netstats __percpu *stats;
 219         union {
 220                 struct net_bridge       *br;
 221                 struct net_bridge_port  *port;
 222         };
 223         union {
 224                 refcount_t              refcnt;
 225                 struct net_bridge_vlan  *brvlan;
 226         };
 227
 228         struct br_tunnel_info           tinfo;
 229
 230         union {
 231                 struct net_bridge_mcast         br_mcast_ctx;
 232                 struct net_bridge_mcast_port    port_mcast_ctx;
 233         };
 234
 235         u16                             msti;
 236
 237         struct list_head                vlist;
 238
 239         struct rcu_head                 rcu;
 240 };
 241
 242 /**
 243  * struct net_bridge_vlan_group
 244  *
 245  * @vlan_hash: VLAN entry rhashtable
 246  * @vlan_list: sorted VLAN entry list
 247  * @num_vlans: number of total VLAN entries
 248  * @pvid: PVID VLAN id
 249  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 250  *
 251  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 252  *            primitives because the bridge can have entries in its list which
 253  *            are just for global context but not for filtering, i.e. they have
 254  *            the master flag set but not the brentry flag. If you have to check
 255  *            if there're "real" entries in the bridge please test @num_vlans
 256  */
 257 struct net_bridge_vlan_group {
 258         struct rhashtable               vlan_hash;
 259         struct rhashtable               tunnel_hash;
 260         struct list_head                vlan_list;
 261         u16                             num_vlans;
 262         u16                             pvid;
 263         u8                              pvid_state;
 264 };
 265
 266 /* bridge fdb flags */
 267 enum {
 268         BR_FDB_LOCAL,
 269         BR_FDB_STATIC,
 270         BR_FDB_STICKY,
 271         BR_FDB_ADDED_BY_USER,
 272         BR_FDB_ADDED_BY_EXT_LEARN,
 273         BR_FDB_OFFLOADED,
 274         BR_FDB_NOTIFY,
 275         BR_FDB_NOTIFY_INACTIVE,
 276         BR_FDB_LOCKED,
 277         BR_FDB_DYNAMIC_LEARNED,
 278 };
 279
 280 struct net_bridge_fdb_key {
 281         mac_addr addr;
 282         u16 vlan_id;
 283 };
 284
 285 struct net_bridge_fdb_entry {
 286         struct rhash_head               rhnode;
 287         struct net_bridge_port          *dst;
 288
 289         struct net_bridge_fdb_key       key;
 290         struct hlist_node               fdb_node;
 291         unsigned long                   flags;
 292
 293         /* write-heavy members should not affect lookups */
 294         unsigned long                   updated ____cacheline_aligned_in_smp;
 295         unsigned long                   used;
 296
 297         struct rcu_head                 rcu;
 298 };
 299
 300 struct net_bridge_fdb_flush_desc {
 301         unsigned long                   flags;
 302         unsigned long                   flags_mask;
 303         int                             port_ifindex;
 304         u16                             vlan_id;
 305 };
 306
 307 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 308 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 309 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 310 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 311 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 312
 313 #define PG_SRC_ENT_LIMIT        32
 314
 315 #define BR_SGRP_F_DELETE        BIT(0)
 316 #define BR_SGRP_F_SEND          BIT(1)
 317 #define BR_SGRP_F_INSTALLED     BIT(2)
 318 #define BR_SGRP_F_USER_ADDED    BIT(3)
 319
 320 struct net_bridge_mcast_gc {
 321         struct hlist_node               gc_node;
 322         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 323 };
 324
 325 struct net_bridge_group_src {
 326         struct hlist_node               node;
 327
 328         struct br_ip                    addr;
 329         struct net_bridge_port_group    *pg;
 330         u8                              flags;
 331         u8                              src_query_rexmit_cnt;
 332         struct timer_list               timer;
 333
 334         struct net_bridge               *br;
 335         struct net_bridge_mcast_gc      mcast_gc;
 336         struct rcu_head                 rcu;
 337 };
 338
 339 struct net_bridge_port_group_sg_key {
 340         struct net_bridge_port          *port;
 341         struct br_ip                    addr;
 342 };
 343
 344 struct net_bridge_port_group {
 345         struct net_bridge_port_group __rcu *next;
 346         struct net_bridge_port_group_sg_key key;
 347         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 348         unsigned char                   flags;
 349         unsigned char                   filter_mode;
 350         unsigned char                   grp_query_rexmit_cnt;
 351         unsigned char                   rt_protocol;
 352
 353         struct hlist_head               src_list;
 354         unsigned int                    src_ents;
 355         struct timer_list               timer;
 356         struct timer_list               rexmit_timer;
 357         struct hlist_node               mglist;
 358         struct rb_root                  eht_set_tree;
 359         struct rb_root                  eht_host_tree;
 360
 361         struct rhash_head               rhnode;
 362         struct net_bridge_mcast_gc      mcast_gc;
 363         struct rcu_head                 rcu;
 364 };
 365
 366 struct net_bridge_mdb_entry {
 367         struct rhash_head               rhnode;
 368         struct net_bridge               *br;
 369         struct net_bridge_port_group __rcu *ports;
 370         struct br_ip                    addr;
 371         bool                            host_joined;
 372
 373         struct timer_list               timer;
 374         struct hlist_node               mdb_node;
 375
 376         struct net_bridge_mcast_gc      mcast_gc;
 377         struct rcu_head                 rcu;
 378 };
 379
 380 struct net_bridge_port {
 381         struct net_bridge               *br;
 382         struct net_device               *dev;
 383         netdevice_tracker               dev_tracker;
 384         struct list_head                list;
 385
 386         unsigned long                   flags;
 387 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 388         struct net_bridge_vlan_group    __rcu *vlgrp;
 389 #endif
 390         struct net_bridge_port          __rcu *backup_port;
 391         u32                             backup_nhid;
 392
 393         /* STP */
 394         u8                              priority;
 395         u8                              state;
 396         u16                             port_no;
 397         unsigned char                   topology_change_ack;
 398         unsigned char                   config_pending;
 399         port_id                         port_id;
 400         port_id                         designated_port;
 401         bridge_id                       designated_root;
 402         bridge_id                       designated_bridge;
 403         u32                             path_cost;
 404         u32                             designated_cost;
 405         unsigned long                   designated_age;
 406
 407         struct timer_list               forward_delay_timer;
 408         struct timer_list               hold_timer;
 409         struct timer_list               message_age_timer;
 410         struct kobject                  kobj;
 411         struct rcu_head                 rcu;
 412
 413         struct net_bridge_mcast_port    multicast_ctx;
 414
 415 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 416         struct bridge_mcast_stats       __percpu *mcast_stats;
 417
 418         u32                             multicast_eht_hosts_limit;
 419         u32                             multicast_eht_hosts_cnt;
 420         struct hlist_head               mglist;
 421 #endif
 422
 423 #ifdef CONFIG_SYSFS
 424         char                            sysfs_name[IFNAMSIZ];
 425 #endif
 426
 427 #ifdef CONFIG_NET_POLL_CONTROLLER
 428         struct netpoll                  *np;
 429 #endif
 430 #ifdef CONFIG_NET_SWITCHDEV
 431         /* Identifier used to group ports that share the same switchdev
 432          * hardware domain.
 433          */
 434         int                             hwdom;
 435         int                             offload_count;
 436         struct netdev_phys_item_id      ppid;
 437 #endif
 438         u16                             group_fwd_mask;
 439         u16                             backup_redirected_cnt;
 440
 441         struct bridge_stp_xstats        stp_xstats;
 442 };
 443
 444 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 445
 446 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 447 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 448
 449 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 450 {
 451         return rcu_dereference(dev->rx_handler_data);
 452 }
 453
 454 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 455 {
 456         return netif_is_bridge_port(dev) ?
 457                 rtnl_dereference(dev->rx_handler_data) : NULL;
 458 }
 459
 460 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 461 {
 462         return netif_is_bridge_port(dev) ?
 463                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 464 }
 465
 466 enum net_bridge_opts {
 467         BROPT_VLAN_ENABLED,
 468         BROPT_VLAN_STATS_ENABLED,
 469         BROPT_NF_CALL_IPTABLES,
 470         BROPT_NF_CALL_IP6TABLES,
 471         BROPT_NF_CALL_ARPTABLES,
 472         BROPT_GROUP_ADDR_SET,
 473         BROPT_MULTICAST_ENABLED,
 474         BROPT_MULTICAST_QUERY_USE_IFADDR,
 475         BROPT_MULTICAST_STATS_ENABLED,
 476         BROPT_HAS_IPV6_ADDR,
 477         BROPT_NEIGH_SUPPRESS_ENABLED,
 478         BROPT_MTU_SET_BY_USER,
 479         BROPT_VLAN_STATS_PER_PORT,
 480         BROPT_NO_LL_LEARN,
 481         BROPT_VLAN_BRIDGE_BINDING,
 482         BROPT_MCAST_VLAN_SNOOPING_ENABLED,
 483         BROPT_MST_ENABLED,
 484 };
 485
 486 struct net_bridge {
 487         spinlock_t                      lock;
 488         spinlock_t                      hash_lock;
 489         struct hlist_head               frame_type_list;
 490         struct net_device               *dev;
 491         unsigned long                   options;
 492         /* These fields are accessed on each packet */
 493 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 494         __be16                          vlan_proto;
 495         u16                             default_pvid;
 496         struct net_bridge_vlan_group    __rcu *vlgrp;
 497 #endif
 498
 499         struct rhashtable               fdb_hash_tbl;
 500         struct list_head                port_list;
 501 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 502         union {
 503                 struct rtable           fake_rtable;
 504                 struct rt6_info         fake_rt6_info;
 505         };
 506 #endif
 507         u16                             group_fwd_mask;
 508         u16                             group_fwd_mask_required;
 509
 510         /* STP */
 511         bridge_id                       designated_root;
 512         bridge_id                       bridge_id;
 513         unsigned char                   topology_change;
 514         unsigned char                   topology_change_detected;
 515         u16                             root_port;
 516         unsigned long                   max_age;
 517         unsigned long                   hello_time;
 518         unsigned long                   forward_delay;
 519         unsigned long                   ageing_time;
 520         unsigned long                   bridge_max_age;
 521         unsigned long                   bridge_hello_time;
 522         unsigned long                   bridge_forward_delay;
 523         unsigned long                   bridge_ageing_time;
 524         u32                             root_path_cost;
 525
 526         u8                              group_addr[ETH_ALEN];
 527
 528         enum {
 529                 BR_NO_STP,              /* no spanning tree */
 530                 BR_KERNEL_STP,          /* old STP in kernel */
 531                 BR_USER_STP,            /* new RSTP in userspace */
 532         } stp_enabled;
 533
 534         struct net_bridge_mcast         multicast_ctx;
 535
 536 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 537         struct bridge_mcast_stats       __percpu *mcast_stats;
 538
 539         u32                             hash_max;
 540
 541         spinlock_t                      multicast_lock;
 542
 543         struct rhashtable               mdb_hash_tbl;
 544         struct rhashtable               sg_port_tbl;
 545
 546         struct hlist_head               mcast_gc_list;
 547         struct hlist_head               mdb_list;
 548
 549         struct work_struct              mcast_gc_work;
 550 #endif
 551
 552         struct timer_list               hello_timer;
 553         struct timer_list               tcn_timer;
 554         struct timer_list               topology_change_timer;
 555         struct delayed_work             gc_work;
 556         struct kobject                  *ifobj;
 557         u32                             auto_cnt;
 558
 559         atomic_t                        fdb_n_learned;
 560         u32                             fdb_max_learned;
 561
 562 #ifdef CONFIG_NET_SWITCHDEV
 563         /* Counter used to make sure that hardware domains get unique
 564          * identifiers in case a bridge spans multiple switchdev instances.
 565          */
 566         int                             last_hwdom;
 567         /* Bit mask of hardware domain numbers in use */
 568         unsigned long                   busy_hwdoms;
 569 #endif
 570         struct hlist_head               fdb_list;
 571
 572 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 573         struct hlist_head               mrp_list;
 574 #endif
 575 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 576         struct hlist_head               mep_list;
 577 #endif
 578 };
 579
 580 struct br_input_skb_cb {
 581         struct net_device *brdev;
 582
 583         u16 frag_max_size;
 584 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 585         u8 igmp;
 586         u8 mrouters_only:1;
 587 #endif
 588         u8 proxyarp_replied:1;
 589         u8 src_port_isolated:1;
 590 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 591         u8 vlan_filtered:1;
 592 #endif
 593 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 594         u8 br_netfilter_broute:1;
 595 #endif
 596
 597 #ifdef CONFIG_NET_SWITCHDEV
 598         /* Set if TX data plane offloading is used towards at least one
 599          * hardware domain.
 600          */
 601         u8 tx_fwd_offload:1;
 602         /* The switchdev hardware domain from which this packet was received.
 603          * If skb->offload_fwd_mark was set, then this packet was already
 604          * forwarded by hardware to the other ports in the source hardware
 605          * domain, otherwise it wasn't.
 606          */
 607         int src_hwdom;
 608         /* Bit mask of hardware domains towards this packet has already been
 609          * transmitted using the TX data plane offload.
 610          */
 611         unsigned long fwd_hwdoms;
 612 #endif
 613
 614         u32 backup_nhid;
 615 };
 616
 617 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 618
 619 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 620 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 621 #else
 622 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 623 #endif
 624
 625 #define br_printk(level, br, format, args...)   \
 626         printk(level "%s: " format, (br)->dev->name, ##args)
 627
 628 #define br_err(__br, format, args...)                   \
 629         br_printk(KERN_ERR, __br, format, ##args)
 630 #define br_warn(__br, format, args...)                  \
 631         br_printk(KERN_WARNING, __br, format, ##args)
 632 #define br_notice(__br, format, args...)                \
 633         br_printk(KERN_NOTICE, __br, format, ##args)
 634 #define br_info(__br, format, args...)                  \
 635         br_printk(KERN_INFO, __br, format, ##args)
 636
 637 #define br_debug(br, format, args...)                   \
 638         pr_debug("%s: " format,  (br)->dev->name, ##args)
 639
 640 /* called under bridge lock */
 641 static inline int br_is_root_bridge(const struct net_bridge *br)
 642 {
 643         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 644 }
 645
 646 /* check if a VLAN entry is global */
 647 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 648 {
 649         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 650 }
 651
 652 /* check if a VLAN entry is used by the bridge */
 653 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 654 {
 655         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 656 }
 657
 658 /* check if we should use the vlan entry, returns false if it's only context */
 659 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 660 {
 661         if (br_vlan_is_master(v)) {
 662                 if (br_vlan_is_brentry(v))
 663                         return true;
 664                 else
 665                         return false;
 666         }
 667
 668         return true;
 669 }
 670
 671 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 672 {
 673         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 674 }
 675
 676 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 677 {
 678         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 679
 680         if (!ret)
 681                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 682
 683         return ret;
 684 }
 685
 686 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 687                                        const struct bridge_vlan_info *last,
 688                                        struct netlink_ext_ack *extack)
 689 {
 690         /* pvid flag is not allowed in ranges */
 691         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 692                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 693                 return false;
 694         }
 695
 696         /* when cur is the range end, check if:
 697          *  - it has range start flag
 698          *  - range ids are invalid (end is equal to or before start)
 699          */
 700         if (last) {
 701                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 702                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 703                         return false;
 704                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 705                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 706                         return false;
 707                 } else if (cur->vid <= last->vid) {
 708                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 709                         return false;
 710                 }
 711         }
 712
 713         /* check for required range flags */
 714         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 715                             BRIDGE_VLAN_INFO_RANGE_END))) {
 716                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 717                 return false;
 718         }
 719
 720         return true;
 721 }
 722
 723 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 724 {
 725         u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 726
 727 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 728         if (!br_vlan_is_master(v))
 729                 mcast_router = v->port_mcast_ctx.multicast_router;
 730         else
 731                 mcast_router = v->br_mcast_ctx.multicast_router;
 732 #endif
 733
 734         return mcast_router;
 735 }
 736
 737 static inline int br_afspec_cmd_to_rtm(int cmd)
 738 {
 739         switch (cmd) {
 740         case RTM_SETLINK:
 741                 return RTM_NEWVLAN;
 742         case RTM_DELLINK:
 743                 return RTM_DELVLAN;
 744         }
 745
 746         return 0;
 747 }
 748
 749 static inline int br_opt_get(const struct net_bridge *br,
 750                              enum net_bridge_opts opt)
 751 {
 752         return test_bit(opt, &br->options);
 753 }
 754
 755 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 756                       struct netlink_ext_ack *extack);
 757 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 758 int br_boolopt_multi_toggle(struct net_bridge *br,
 759                             struct br_boolopt_multi *bm,
 760                             struct netlink_ext_ack *extack);
 761 void br_boolopt_multi_get(const struct net_bridge *br,
 762                           struct br_boolopt_multi *bm);
 763 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 764
 765 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 766 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 767 {
 768         struct tc_skb_ext *ext;
 769
 770         if (!tc_skb_ext_tc_enabled())
 771                 return;
 772
 773         ext = skb_ext_find(skb, TC_SKB_EXT);
 774         if (ext) {
 775                 ext->l2_miss = miss;
 776                 return;
 777         }
 778         if (!miss)
 779                 return;
 780         ext = tc_skb_ext_alloc(skb);
 781         if (!ext)
 782                 return;
 783         ext->l2_miss = true;
 784 }
 785 #else
 786 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 787 {
 788 }
 789 #endif
 790
 791 /* br_device.c */
 792 void br_dev_setup(struct net_device *dev);
 793 void br_dev_delete(struct net_device *dev, struct list_head *list);
 794 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 795 #ifdef CONFIG_NET_POLL_CONTROLLER
 796 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 797                                        struct sk_buff *skb)
 798 {
 799         netpoll_send_skb(p->np, skb);
 800 }
 801
 802 int br_netpoll_enable(struct net_bridge_port *p);
 803 void br_netpoll_disable(struct net_bridge_port *p);
 804 #else
 805 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 806                                        struct sk_buff *skb)
 807 {
 808 }
 809
 810 static inline int br_netpoll_enable(struct net_bridge_port *p)
 811 {
 812         return 0;
 813 }
 814
 815 static inline void br_netpoll_disable(struct net_bridge_port *p)
 816 {
 817 }
 818 #endif
 819
 820 /* br_fdb.c */
 821 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 822 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 823 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 824                                      NTF_STICKY | NTF_OFFLOADED)
 825
 826 int br_fdb_init(void);
 827 void br_fdb_fini(void);
 828 int br_fdb_hash_init(struct net_bridge *br);
 829 void br_fdb_hash_fini(struct net_bridge *br);
 830 void br_fdb_flush(struct net_bridge *br,
 831                   const struct net_bridge_fdb_flush_desc *desc);
 832 void br_fdb_find_delete_local(struct net_bridge *br,
 833                               const struct net_bridge_port *p,
 834                               const unsigned char *addr, u16 vid);
 835 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 836 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 837 void br_fdb_cleanup(struct work_struct *work);
 838 void br_fdb_delete_by_port(struct net_bridge *br,
 839                            const struct net_bridge_port *p, u16 vid, int do_all);
 840 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 841                                              const unsigned char *addr,
 842                                              __u16 vid);
 843 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 844 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 845                    unsigned long off);
 846 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 847                      const unsigned char *addr, u16 vid);
 848 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 849                    const unsigned char *addr, u16 vid, unsigned long flags);
 850
 851 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 852                   struct net_device *dev, const unsigned char *addr, u16 vid,
 853                   struct netlink_ext_ack *extack);
 854 int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
 855                        struct netlink_ext_ack *extack);
 856 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 857                const unsigned char *addr, u16 vid, u16 nlh_flags,
 858                struct netlink_ext_ack *extack);
 859 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 860                 struct net_device *dev, struct net_device *fdev, int *idx);
 861 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 862                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 863                struct netlink_ext_ack *extack);
 864 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 865 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 866 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 867                               const unsigned char *addr, u16 vid,
 868                               bool locked, bool swdev_notify);
 869 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 870                               const unsigned char *addr, u16 vid,
 871                               bool swdev_notify);
 872 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 873                           const unsigned char *addr, u16 vid, bool offloaded);
 874
 875 /* br_forward.c */
 876 enum br_pkt_type {
 877         BR_PKT_UNICAST,
 878         BR_PKT_MULTICAST,
 879         BR_PKT_BROADCAST
 880 };
 881 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 882 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 883                 bool local_rcv, bool local_orig);
 884 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 885 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 886               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
 887               u16 vid);
 888
 889 /* return true if both source port and dest port are isolated */
 890 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 891                                    const struct sk_buff *skb)
 892 {
 893         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 894                (to->flags & BR_ISOLATED);
 895 }
 896
 897 /* br_if.c */
 898 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 899 int br_add_bridge(struct net *net, const char *name);
 900 int br_del_bridge(struct net *net, const char *name);
 901 int br_add_if(struct net_bridge *br, struct net_device *dev,
 902               struct netlink_ext_ack *extack);
 903 int br_del_if(struct net_bridge *br, struct net_device *dev);
 904 void br_mtu_auto_adjust(struct net_bridge *br);
 905 netdev_features_t br_features_recompute(struct net_bridge *br,
 906                                         netdev_features_t features);
 907 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 908 void br_manage_promisc(struct net_bridge *br);
 909 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 910
 911 /* br_input.c */
 912 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 913 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 914
 915 struct br_frame_type {
 916         __be16                  type;
 917         int                     (*frame_handler)(struct net_bridge_port *port,
 918                                                  struct sk_buff *skb);
 919         struct hlist_node       list;
 920 };
 921
 922 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 923 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 924
 925 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 926 {
 927         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 928 }
 929
 930 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 931 {
 932         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 933 }
 934
 935 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 936 {
 937         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 938 }
 939
 940 static inline struct net_bridge_port *
 941 br_port_get_check_rtnl(const struct net_device *dev)
 942 {
 943         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 944 }
 945
 946 /* br_ioctl.c */
 947 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 948                           void __user *data, int cmd);
 949 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 950                   struct ifreq *ifr, void __user *uarg);
 951
 952 /* br_multicast.c */
 953 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 954 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 955                      struct net_bridge_mcast_port **pmctx,
 956                      struct net_bridge_vlan *vlan,
 957                      struct sk_buff *skb, u16 vid);
 958 struct net_bridge_mdb_entry *
 959 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
 960                      u16 vid);
 961 int br_multicast_add_port(struct net_bridge_port *port);
 962 void br_multicast_del_port(struct net_bridge_port *port);
 963 void br_multicast_enable_port(struct net_bridge_port *port);
 964 void br_multicast_disable_port(struct net_bridge_port *port);
 965 void br_multicast_init(struct net_bridge *br);
 966 void br_multicast_join_snoopers(struct net_bridge *br);
 967 void br_multicast_leave_snoopers(struct net_bridge *br);
 968 void br_multicast_open(struct net_bridge *br);
 969 void br_multicast_stop(struct net_bridge *br);
 970 void br_multicast_dev_del(struct net_bridge *br);
 971 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 972                         struct net_bridge_mcast *brmctx,
 973                         bool local_rcv, bool local_orig);
 974 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 975 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 976                                  unsigned long val);
 977 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 978 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 979                         struct netlink_ext_ack *extack);
 980 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 981 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 982                                   unsigned long val);
 983 #if IS_ENABLED(CONFIG_IPV6)
 984 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 985                                  unsigned long val);
 986 #endif
 987 struct net_bridge_mdb_entry *
 988 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 989 struct net_bridge_mdb_entry *
 990 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 991 struct net_bridge_port_group *
 992 br_multicast_new_port_group(struct net_bridge_port *port,
 993                             const struct br_ip *group,
 994                             struct net_bridge_port_group __rcu *next,
 995                             unsigned char flags, const unsigned char *src,
 996                             u8 filter_mode, u8 rt_protocol,
 997                             struct netlink_ext_ack *extack);
 998 void br_multicast_del_port_group(struct net_bridge_port_group *p);
 999 int br_mdb_hash_init(struct net_bridge *br);
1000 void br_mdb_hash_fini(struct net_bridge *br);
1001 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1002                    struct net_bridge_port_group *pg, int type);
1003 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1004                    int type);
1005 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1006                          struct net_bridge_port_group *pg,
1007                          struct net_bridge_port_group __rcu **pp);
1008 void br_multicast_count(struct net_bridge *br,
1009                         const struct net_bridge_port *p,
1010                         const struct sk_buff *skb, u8 type, u8 dir);
1011 int br_multicast_init_stats(struct net_bridge *br);
1012 void br_multicast_uninit_stats(struct net_bridge *br);
1013 void br_multicast_get_stats(const struct net_bridge *br,
1014                             const struct net_bridge_port *p,
1015                             struct br_mcast_stats *dest);
1016 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1017 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1018 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1019 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1020                struct netlink_ext_ack *extack);
1021 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1022                struct netlink_ext_ack *extack);
1023 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1024                 struct netlink_callback *cb);
1025 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1026                struct netlink_ext_ack *extack);
1027 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1028                             struct net_bridge_mdb_entry *mp, bool notify);
1029 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1030 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1031                                      u8 filter_mode);
1032 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1033                                        struct net_bridge_port_group *sg);
1034 struct net_bridge_group_src *
1035 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1036 struct net_bridge_group_src *
1037 br_multicast_new_group_src(struct net_bridge_port_group *pg,
1038                            struct br_ip *src_ip);
1039 void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1040 void br_multicast_del_group_src(struct net_bridge_group_src *src,
1041                                 bool fastleave);
1042 void br_multicast_ctx_init(struct net_bridge *br,
1043                            struct net_bridge_vlan *vlan,
1044                            struct net_bridge_mcast *brmctx);
1045 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1046 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1047                                 struct net_bridge_vlan *vlan,
1048                                 struct net_bridge_mcast_port *pmctx);
1049 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1050 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1051 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1052                                       struct netlink_ext_ack *extack);
1053 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1054
1055 int br_rports_fill_info(struct sk_buff *skb,
1056                         const struct net_bridge_mcast *brmctx);
1057 int br_multicast_dump_querier_state(struct sk_buff *skb,
1058                                     const struct net_bridge_mcast *brmctx,
1059                                     int nest_attr);
1060 size_t br_multicast_querier_state_size(void);
1061 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1062 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1063                                   unsigned long val);
1064 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1065                                           unsigned long val);
1066
1067 static inline bool br_group_is_l2(const struct br_ip *group)
1068 {
1069         return group->proto == 0;
1070 }
1071
1072 #define mlock_dereference(X, br) \
1073         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1074
1075 static inline struct hlist_node *
1076 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1077                                   struct sk_buff *skb)
1078 {
1079 #if IS_ENABLED(CONFIG_IPV6)
1080         if (skb->protocol == htons(ETH_P_IPV6))
1081                 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1082 #endif
1083         return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1084 }
1085
1086 static inline struct net_bridge_port *
1087 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1088 {
1089         struct net_bridge_mcast_port *mctx;
1090
1091 #if IS_ENABLED(CONFIG_IPV6)
1092         if (skb->protocol == htons(ETH_P_IPV6))
1093                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1094                                         ip6_rlist);
1095         else
1096 #endif
1097                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1098                                         ip4_rlist);
1099
1100         if (mctx)
1101                 return mctx->port;
1102         else
1103                 return NULL;
1104 }
1105
1106 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1107 {
1108         return timer_pending(&brmctx->ip4_mc_router_timer);
1109 }
1110
1111 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1112 {
1113 #if IS_ENABLED(CONFIG_IPV6)
1114         return timer_pending(&brmctx->ip6_mc_router_timer);
1115 #else
1116         return false;
1117 #endif
1118 }
1119
1120 static inline bool
1121 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1122 {
1123         switch (brmctx->multicast_router) {
1124         case MDB_RTR_TYPE_PERM:
1125                 return true;
1126         case MDB_RTR_TYPE_TEMP_QUERY:
1127                 if (skb) {
1128                         if (skb->protocol == htons(ETH_P_IP))
1129                                 return br_ip4_multicast_is_router(brmctx);
1130                         else if (skb->protocol == htons(ETH_P_IPV6))
1131                                 return br_ip6_multicast_is_router(brmctx);
1132                 } else {
1133                         return br_ip4_multicast_is_router(brmctx) ||
1134                                br_ip6_multicast_is_router(brmctx);
1135                 }
1136                 fallthrough;
1137         default:
1138                 return false;
1139         }
1140 }
1141
1142 static inline bool
1143 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1144                               struct bridge_mcast_other_query *querier,
1145                               const bool is_ipv6)
1146 {
1147         bool own_querier_enabled;
1148
1149         if (brmctx->multicast_querier) {
1150                 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1151                         own_querier_enabled = false;
1152                 else
1153                         own_querier_enabled = true;
1154         } else {
1155                 own_querier_enabled = false;
1156         }
1157
1158         return time_is_before_jiffies(querier->delay_time) &&
1159                (own_querier_enabled || timer_pending(&querier->timer));
1160 }
1161
1162 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1163                                                struct ethhdr *eth,
1164                                                const struct net_bridge_mdb_entry *mdb)
1165 {
1166         switch (eth->h_proto) {
1167         case (htons(ETH_P_IP)):
1168                 return __br_multicast_querier_exists(brmctx,
1169                         &brmctx->ip4_other_query, false);
1170 #if IS_ENABLED(CONFIG_IPV6)
1171         case (htons(ETH_P_IPV6)):
1172                 return __br_multicast_querier_exists(brmctx,
1173                         &brmctx->ip6_other_query, true);
1174 #endif
1175         default:
1176                 return !!mdb && br_group_is_l2(&mdb->addr);
1177         }
1178 }
1179
1180 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1181 {
1182         switch (ip->proto) {
1183         case htons(ETH_P_IP):
1184                 return ipv4_is_zeronet(ip->src.ip4);
1185 #if IS_ENABLED(CONFIG_IPV6)
1186         case htons(ETH_P_IPV6):
1187                 return ipv6_addr_any(&ip->src.ip6);
1188 #endif
1189         default:
1190                 return false;
1191         }
1192 }
1193
1194 static inline bool
1195 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1196                                 __be16 proto)
1197 {
1198         switch (proto) {
1199         case htons(ETH_P_IP):
1200                 return !!(brmctx->multicast_igmp_version == 3);
1201 #if IS_ENABLED(CONFIG_IPV6)
1202         case htons(ETH_P_IPV6):
1203                 return !!(brmctx->multicast_mld_version == 2);
1204 #endif
1205         default:
1206                 return false;
1207         }
1208 }
1209
1210 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1211 {
1212         return BR_INPUT_SKB_CB(skb)->igmp;
1213 }
1214
1215 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1216 {
1217         return brmctx->multicast_last_member_interval *
1218                brmctx->multicast_last_member_count;
1219 }
1220
1221 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1222 {
1223         return brmctx->multicast_membership_interval;
1224 }
1225
1226 static inline bool
1227 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1228 {
1229         return !!brmctx->vlan;
1230 }
1231
1232 static inline bool
1233 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1234 {
1235         return !!pmctx->vlan;
1236 }
1237
1238 static inline struct net_bridge_mcast *
1239 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1240 {
1241         if (!br_multicast_port_ctx_is_vlan(pmctx))
1242                 return &pmctx->port->br->multicast_ctx;
1243         else
1244                 return &pmctx->vlan->brvlan->br_mcast_ctx;
1245 }
1246
1247 static inline bool
1248 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1249 {
1250         return br_multicast_ctx_is_vlan(brmctx) &&
1251                (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1252                 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1253 }
1254
1255 static inline bool
1256 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1257 {
1258         return br_multicast_ctx_is_vlan(brmctx) &&
1259                !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1260 }
1261
1262 static inline bool
1263 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1264 {
1265         return br_multicast_port_ctx_is_vlan(pmctx) &&
1266                !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1267 }
1268
1269 static inline bool
1270 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1271 {
1272         return pmctx->port->state == BR_STATE_DISABLED ||
1273                (br_multicast_port_ctx_is_vlan(pmctx) &&
1274                 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1275                  pmctx->vlan->state == BR_STATE_DISABLED));
1276 }
1277
1278 static inline bool
1279 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1280 {
1281         return br_multicast_port_ctx_state_disabled(pmctx) ||
1282                pmctx->port->state == BR_STATE_BLOCKING ||
1283                (br_multicast_port_ctx_is_vlan(pmctx) &&
1284                 pmctx->vlan->state == BR_STATE_BLOCKING);
1285 }
1286
1287 static inline bool
1288 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1289 {
1290 #if IS_ENABLED(CONFIG_IPV6)
1291         return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1292                !hlist_empty(&brmctx->ip6_mc_router_list);
1293 #else
1294         return !hlist_empty(&brmctx->ip4_mc_router_list);
1295 #endif
1296 }
1297
1298 static inline bool
1299 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1300                                const struct net_bridge_mcast *brmctx2)
1301 {
1302         return brmctx1->multicast_igmp_version ==
1303                brmctx2->multicast_igmp_version &&
1304                brmctx1->multicast_last_member_count ==
1305                brmctx2->multicast_last_member_count &&
1306                brmctx1->multicast_startup_query_count ==
1307                brmctx2->multicast_startup_query_count &&
1308                brmctx1->multicast_last_member_interval ==
1309                brmctx2->multicast_last_member_interval &&
1310                brmctx1->multicast_membership_interval ==
1311                brmctx2->multicast_membership_interval &&
1312                brmctx1->multicast_querier_interval ==
1313                brmctx2->multicast_querier_interval &&
1314                brmctx1->multicast_query_interval ==
1315                brmctx2->multicast_query_interval &&
1316                brmctx1->multicast_query_response_interval ==
1317                brmctx2->multicast_query_response_interval &&
1318                brmctx1->multicast_startup_query_interval ==
1319                brmctx2->multicast_startup_query_interval &&
1320                brmctx1->multicast_querier == brmctx2->multicast_querier &&
1321                brmctx1->multicast_router == brmctx2->multicast_router &&
1322                !br_rports_have_mc_router(brmctx1) &&
1323                !br_rports_have_mc_router(brmctx2) &&
1324 #if IS_ENABLED(CONFIG_IPV6)
1325                brmctx1->multicast_mld_version ==
1326                brmctx2->multicast_mld_version &&
1327 #endif
1328                true;
1329 }
1330
1331 static inline bool
1332 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1333 {
1334         bool vlan_snooping_enabled;
1335
1336         vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1337                                              BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1338
1339         return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1340 }
1341 #else
1342 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1343                                    struct net_bridge_mcast_port **pmctx,
1344                                    struct net_bridge_vlan *vlan,
1345                                    struct sk_buff *skb,
1346                                    u16 vid)
1347 {
1348         return 0;
1349 }
1350
1351 static inline struct net_bridge_mdb_entry *
1352 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1353                      u16 vid)
1354 {
1355         return NULL;
1356 }
1357
1358 static inline int br_multicast_add_port(struct net_bridge_port *port)
1359 {
1360         return 0;
1361 }
1362
1363 static inline void br_multicast_del_port(struct net_bridge_port *port)
1364 {
1365 }
1366
1367 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1368 {
1369 }
1370
1371 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1372 {
1373 }
1374
1375 static inline void br_multicast_init(struct net_bridge *br)
1376 {
1377 }
1378
1379 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1380 {
1381 }
1382
1383 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1384 {
1385 }
1386
1387 static inline void br_multicast_open(struct net_bridge *br)
1388 {
1389 }
1390
1391 static inline void br_multicast_stop(struct net_bridge *br)
1392 {
1393 }
1394
1395 static inline void br_multicast_dev_del(struct net_bridge *br)
1396 {
1397 }
1398
1399 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1400                                       struct sk_buff *skb,
1401                                       struct net_bridge_mcast *brmctx,
1402                                       bool local_rcv, bool local_orig)
1403 {
1404 }
1405
1406 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1407                                           struct sk_buff *skb)
1408 {
1409         return false;
1410 }
1411
1412 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1413                                                struct ethhdr *eth,
1414                                                const struct net_bridge_mdb_entry *mdb)
1415 {
1416         return false;
1417 }
1418
1419 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1420                              u16 nlmsg_flags, struct netlink_ext_ack *extack)
1421 {
1422         return -EOPNOTSUPP;
1423 }
1424
1425 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1426                              struct netlink_ext_ack *extack)
1427 {
1428         return -EOPNOTSUPP;
1429 }
1430
1431 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1432                               struct netlink_callback *cb)
1433 {
1434         return 0;
1435 }
1436
1437 static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1438                              u32 portid, u32 seq,
1439                              struct netlink_ext_ack *extack)
1440 {
1441         return -EOPNOTSUPP;
1442 }
1443
1444 static inline int br_mdb_hash_init(struct net_bridge *br)
1445 {
1446         return 0;
1447 }
1448
1449 static inline void br_mdb_hash_fini(struct net_bridge *br)
1450 {
1451 }
1452
1453 static inline void br_multicast_count(struct net_bridge *br,
1454                                       const struct net_bridge_port *p,
1455                                       const struct sk_buff *skb,
1456                                       u8 type, u8 dir)
1457 {
1458 }
1459
1460 static inline int br_multicast_init_stats(struct net_bridge *br)
1461 {
1462         return 0;
1463 }
1464
1465 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1466 {
1467 }
1468
1469 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1470 {
1471         return 0;
1472 }
1473
1474 static inline void br_multicast_ctx_init(struct net_bridge *br,
1475                                          struct net_bridge_vlan *vlan,
1476                                          struct net_bridge_mcast *brmctx)
1477 {
1478 }
1479
1480 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1481 {
1482 }
1483
1484 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1485                                               struct net_bridge_vlan *vlan,
1486                                               struct net_bridge_mcast_port *pmctx)
1487 {
1488 }
1489
1490 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1491 {
1492 }
1493
1494 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1495                                                 bool on)
1496 {
1497 }
1498
1499 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1500                                                     bool on,
1501                                                     struct netlink_ext_ack *extack)
1502 {
1503         return -EOPNOTSUPP;
1504 }
1505
1506 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1507                                                    bool on)
1508 {
1509         return false;
1510 }
1511
1512 static inline bool
1513 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1514                                const struct net_bridge_mcast *brmctx2)
1515 {
1516         return true;
1517 }
1518 #endif
1519
1520 /* br_vlan.c */
1521 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1522 bool br_allowed_ingress(const struct net_bridge *br,
1523                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1524                         u16 *vid, u8 *state,
1525                         struct net_bridge_vlan **vlan);
1526 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1527                        const struct sk_buff *skb);
1528 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1529 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1530                                const struct net_bridge_port *port,
1531                                struct net_bridge_vlan_group *vg,
1532                                struct sk_buff *skb);
1533 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1534                 bool *changed, struct netlink_ext_ack *extack);
1535 int br_vlan_delete(struct net_bridge *br, u16 vid);
1536 void br_vlan_flush(struct net_bridge *br);
1537 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1538 void br_recalculate_fwd_mask(struct net_bridge *br);
1539 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1540                           struct netlink_ext_ack *extack);
1541 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1542                         struct netlink_ext_ack *extack);
1543 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1544                       struct netlink_ext_ack *extack);
1545 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1546 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1547 int br_vlan_init(struct net_bridge *br);
1548 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1549                              struct netlink_ext_ack *extack);
1550 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1551                                struct netlink_ext_ack *extack);
1552 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1553                  bool *changed, struct netlink_ext_ack *extack);
1554 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1555 void nbp_vlan_flush(struct net_bridge_port *port);
1556 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1557 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1558 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1559                        struct pcpu_sw_netstats *stats);
1560 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1561 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1562                          void *ptr);
1563 void br_vlan_rtnl_init(void);
1564 void br_vlan_rtnl_uninit(void);
1565 void br_vlan_notify(const struct net_bridge *br,
1566                     const struct net_bridge_port *p,
1567                     u16 vid, u16 vid_range,
1568                     int cmd);
1569 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1570                              const struct net_bridge_vlan *range_end);
1571
1572 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1573                                     struct net_device_path_ctx *ctx,
1574                                     struct net_device_path *path);
1575 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1576                                    struct net_bridge_port *dst,
1577                                    struct net_device_path *path);
1578
1579 static inline struct net_bridge_vlan_group *br_vlan_group(
1580                                         const struct net_bridge *br)
1581 {
1582         return rtnl_dereference(br->vlgrp);
1583 }
1584
1585 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1586                                         const struct net_bridge_port *p)
1587 {
1588         return rtnl_dereference(p->vlgrp);
1589 }
1590
1591 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1592                                         const struct net_bridge *br)
1593 {
1594         return rcu_dereference(br->vlgrp);
1595 }
1596
1597 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1598                                         const struct net_bridge_port *p)
1599 {
1600         return rcu_dereference(p->vlgrp);
1601 }
1602
1603 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1604  * skb, the vlan tag will always be present if the frame was tagged.
1605  */
1606 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1607 {
1608         int err = 0;
1609
1610         if (skb_vlan_tag_present(skb)) {
1611                 *vid = skb_vlan_tag_get_id(skb);
1612         } else {
1613                 *vid = 0;
1614                 err = -EINVAL;
1615         }
1616
1617         return err;
1618 }
1619
1620 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1621 {
1622         if (!vg)
1623                 return 0;
1624
1625         smp_rmb();
1626         return vg->pvid;
1627 }
1628
1629 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1630 {
1631         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1632 }
1633 #else
1634 static inline bool br_allowed_ingress(const struct net_bridge *br,
1635                                       struct net_bridge_vlan_group *vg,
1636                                       struct sk_buff *skb,
1637                                       u16 *vid, u8 *state,
1638                                       struct net_bridge_vlan **vlan)
1639
1640 {
1641         *vlan = NULL;
1642         return true;
1643 }
1644
1645 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1646                                      const struct sk_buff *skb)
1647 {
1648         return true;
1649 }
1650
1651 static inline bool br_should_learn(struct net_bridge_port *p,
1652                                    struct sk_buff *skb, u16 *vid)
1653 {
1654         return true;
1655 }
1656
1657 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1658                                              const struct net_bridge_port *port,
1659                                              struct net_bridge_vlan_group *vg,
1660                                              struct sk_buff *skb)
1661 {
1662         return skb;
1663 }
1664
1665 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1666                               bool *changed, struct netlink_ext_ack *extack)
1667 {
1668         *changed = false;
1669         return -EOPNOTSUPP;
1670 }
1671
1672 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1673 {
1674         return -EOPNOTSUPP;
1675 }
1676
1677 static inline void br_vlan_flush(struct net_bridge *br)
1678 {
1679 }
1680
1681 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1682 {
1683 }
1684
1685 static inline int br_vlan_init(struct net_bridge *br)
1686 {
1687         return 0;
1688 }
1689
1690 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1691                                bool *changed, struct netlink_ext_ack *extack)
1692 {
1693         *changed = false;
1694         return -EOPNOTSUPP;
1695 }
1696
1697 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1698 {
1699         return -EOPNOTSUPP;
1700 }
1701
1702 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1703 {
1704 }
1705
1706 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1707                                                    u16 vid)
1708 {
1709         return NULL;
1710 }
1711
1712 static inline int nbp_vlan_init(struct net_bridge_port *port,
1713                                 struct netlink_ext_ack *extack)
1714 {
1715         return 0;
1716 }
1717
1718 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1719 {
1720         return 0;
1721 }
1722
1723 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1724 {
1725         return 0;
1726 }
1727
1728 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1729                                         unsigned long val,
1730                                         struct netlink_ext_ack *extack)
1731 {
1732         return -EOPNOTSUPP;
1733 }
1734
1735 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1736                                          u32 filter_mask)
1737 {
1738         return 0;
1739 }
1740
1741 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1742                                                   struct net_device_path_ctx *ctx,
1743                                                   struct net_device_path *path)
1744 {
1745 }
1746
1747 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1748                                                  struct net_bridge_port *dst,
1749                                                  struct net_device_path *path)
1750 {
1751         return 0;
1752 }
1753
1754 static inline struct net_bridge_vlan_group *br_vlan_group(
1755                                         const struct net_bridge *br)
1756 {
1757         return NULL;
1758 }
1759
1760 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1761                                         const struct net_bridge_port *p)
1762 {
1763         return NULL;
1764 }
1765
1766 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1767                                         const struct net_bridge *br)
1768 {
1769         return NULL;
1770 }
1771
1772 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1773                                         const struct net_bridge_port *p)
1774 {
1775         return NULL;
1776 }
1777
1778 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1779                                      struct pcpu_sw_netstats *stats)
1780 {
1781 }
1782
1783 static inline void br_vlan_port_event(struct net_bridge_port *p,
1784                                       unsigned long event)
1785 {
1786 }
1787
1788 static inline int br_vlan_bridge_event(struct net_device *dev,
1789                                        unsigned long event, void *ptr)
1790 {
1791         return 0;
1792 }
1793
1794 static inline void br_vlan_rtnl_init(void)
1795 {
1796 }
1797
1798 static inline void br_vlan_rtnl_uninit(void)
1799 {
1800 }
1801
1802 static inline void br_vlan_notify(const struct net_bridge *br,
1803                                   const struct net_bridge_port *p,
1804                                   u16 vid, u16 vid_range,
1805                                   int cmd)
1806 {
1807 }
1808
1809 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1810                                            const struct net_bridge_vlan *range_end)
1811 {
1812         return true;
1813 }
1814
1815 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1816 {
1817         return 0;
1818 }
1819
1820 #endif
1821
1822 /* br_vlan_options.c */
1823 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1824 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1825                            const struct net_bridge_vlan *range_end);
1826 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1827                        const struct net_bridge_port *p);
1828 size_t br_vlan_opts_nl_size(void);
1829 int br_vlan_process_options(const struct net_bridge *br,
1830                             const struct net_bridge_port *p,
1831                             struct net_bridge_vlan *range_start,
1832                             struct net_bridge_vlan *range_end,
1833                             struct nlattr **tb,
1834                             struct netlink_ext_ack *extack);
1835 int br_vlan_rtm_process_global_options(struct net_device *dev,
1836                                        const struct nlattr *attr,
1837                                        int cmd,
1838                                        struct netlink_ext_ack *extack);
1839 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1840                                          const struct net_bridge_vlan *r_end);
1841 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1842                               const struct net_bridge_vlan *v_opts);
1843
1844 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1845 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1846 {
1847         return READ_ONCE(v->state);
1848 }
1849
1850 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1851 {
1852         WRITE_ONCE(v->state, state);
1853 }
1854
1855 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1856 {
1857         return READ_ONCE(vg->pvid_state);
1858 }
1859
1860 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1861                                           u8 state)
1862 {
1863         WRITE_ONCE(vg->pvid_state, state);
1864 }
1865
1866 /* learn_allow is true at ingress and false at egress */
1867 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1868 {
1869         switch (state) {
1870         case BR_STATE_LEARNING:
1871                 return learn_allow;
1872         case BR_STATE_FORWARDING:
1873                 return true;
1874         default:
1875                 return false;
1876         }
1877 }
1878 #endif
1879
1880 /* br_mst.c */
1881 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1882 DECLARE_STATIC_KEY_FALSE(br_mst_used);
1883 static inline bool br_mst_is_enabled(struct net_bridge *br)
1884 {
1885         return static_branch_unlikely(&br_mst_used) &&
1886                 br_opt_get(br, BROPT_MST_ENABLED);
1887 }
1888
1889 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1890                      struct netlink_ext_ack *extack);
1891 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1892 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1893 int br_mst_set_enabled(struct net_bridge *br, bool on,
1894                        struct netlink_ext_ack *extack);
1895 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1896 int br_mst_fill_info(struct sk_buff *skb,
1897                      const struct net_bridge_vlan_group *vg);
1898 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1899                    struct netlink_ext_ack *extack);
1900 #else
1901 static inline bool br_mst_is_enabled(struct net_bridge *br)
1902 {
1903         return false;
1904 }
1905
1906 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1907                                    u8 state, struct netlink_ext_ack *extack)
1908 {
1909         return -EOPNOTSUPP;
1910 }
1911
1912 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1913                                      struct netlink_ext_ack *extack)
1914 {
1915         return -EOPNOTSUPP;
1916 }
1917
1918 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1919 {
1920         return 0;
1921 }
1922
1923 static inline int br_mst_fill_info(struct sk_buff *skb,
1924                                    const struct net_bridge_vlan_group *vg)
1925 {
1926         return -EOPNOTSUPP;
1927 }
1928
1929 static inline int br_mst_process(struct net_bridge_port *p,
1930                                  const struct nlattr *mst_attr,
1931                                  struct netlink_ext_ack *extack)
1932 {
1933         return -EOPNOTSUPP;
1934 }
1935 #endif
1936
1937 struct nf_br_ops {
1938         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1939 };
1940 extern const struct nf_br_ops __rcu *nf_br_ops;
1941
1942 /* br_netfilter.c */
1943 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1944 int br_nf_core_init(void);
1945 void br_nf_core_fini(void);
1946 void br_netfilter_rtable_init(struct net_bridge *);
1947 #else
1948 static inline int br_nf_core_init(void) { return 0; }
1949 static inline void br_nf_core_fini(void) {}
1950 #define br_netfilter_rtable_init(x)
1951 #endif
1952
1953 /* br_stp.c */
1954 void br_set_state(struct net_bridge_port *p, unsigned int state);
1955 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1956 void br_init_port(struct net_bridge_port *p);
1957 void br_become_designated_port(struct net_bridge_port *p);
1958
1959 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1960 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1961 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1962 int br_set_max_age(struct net_bridge *br, unsigned long x);
1963 int __set_ageing_time(struct net_device *dev, unsigned long t);
1964 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1965
1966
1967 /* br_stp_if.c */
1968 void br_stp_enable_bridge(struct net_bridge *br);
1969 void br_stp_disable_bridge(struct net_bridge *br);
1970 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1971                        struct netlink_ext_ack *extack);
1972 void br_stp_enable_port(struct net_bridge_port *p);
1973 void br_stp_disable_port(struct net_bridge_port *p);
1974 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1975 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1976 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1977 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1978 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1979 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1980
1981 /* br_stp_bpdu.c */
1982 struct stp_proto;
1983 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1984                 struct net_device *dev);
1985
1986 /* br_stp_timer.c */
1987 void br_stp_timer_init(struct net_bridge *br);
1988 void br_stp_port_timer_init(struct net_bridge_port *p);
1989 unsigned long br_timer_value(const struct timer_list *timer);
1990
1991 /* br.c */
1992 #if IS_ENABLED(CONFIG_ATM_LANE)
1993 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1994 #endif
1995
1996 /* br_mrp.c */
1997 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1998 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1999                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2000 bool br_mrp_enabled(struct net_bridge *br);
2001 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2002 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2003 #else
2004 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2005                                struct nlattr *attr, int cmd,
2006                                struct netlink_ext_ack *extack)
2007 {
2008         return -EOPNOTSUPP;
2009 }
2010
2011 static inline bool br_mrp_enabled(struct net_bridge *br)
2012 {
2013         return false;
2014 }
2015
2016 static inline void br_mrp_port_del(struct net_bridge *br,
2017                                    struct net_bridge_port *p)
2018 {
2019 }
2020
2021 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2022 {
2023         return 0;
2024 }
2025
2026 #endif
2027
2028 /* br_cfm.c */
2029 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
2030 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2031                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2032 bool br_cfm_created(struct net_bridge *br);
2033 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2034 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2035 int br_cfm_status_fill_info(struct sk_buff *skb,
2036                             struct net_bridge *br,
2037                             bool getlink);
2038 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2039 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2040 #else
2041 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2042                                struct nlattr *attr, int cmd,
2043                                struct netlink_ext_ack *extack)
2044 {
2045         return -EOPNOTSUPP;
2046 }
2047
2048 static inline bool br_cfm_created(struct net_bridge *br)
2049 {
2050         return false;
2051 }
2052
2053 static inline void br_cfm_port_del(struct net_bridge *br,
2054                                    struct net_bridge_port *p)
2055 {
2056 }
2057
2058 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2059 {
2060         return -EOPNOTSUPP;
2061 }
2062
2063 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2064                                           struct net_bridge *br,
2065                                           bool getlink)
2066 {
2067         return -EOPNOTSUPP;
2068 }
2069
2070 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2071 {
2072         *count = 0;
2073         return -EOPNOTSUPP;
2074 }
2075
2076 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2077 {
2078         *count = 0;
2079         return -EOPNOTSUPP;
2080 }
2081 #endif
2082
2083 /* br_netlink.c */
2084 extern struct rtnl_link_ops br_link_ops;
2085 int br_netlink_init(void);
2086 void br_netlink_fini(void);
2087 void br_ifinfo_notify(int event, const struct net_bridge *br,
2088                       const struct net_bridge_port *port);
2089 void br_info_notify(int event, const struct net_bridge *br,
2090                     const struct net_bridge_port *port, u32 filter);
2091 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2092                struct netlink_ext_ack *extack);
2093 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2094 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2095                u32 filter_mask, int nlflags);
2096 int br_process_vlan_info(struct net_bridge *br,
2097                          struct net_bridge_port *p, int cmd,
2098                          struct bridge_vlan_info *vinfo_curr,
2099                          struct bridge_vlan_info **vinfo_last,
2100                          bool *changed,
2101                          struct netlink_ext_ack *extack);
2102
2103 #ifdef CONFIG_SYSFS
2104 /* br_sysfs_if.c */
2105 extern const struct sysfs_ops brport_sysfs_ops;
2106 int br_sysfs_addif(struct net_bridge_port *p);
2107 int br_sysfs_renameif(struct net_bridge_port *p);
2108
2109 /* br_sysfs_br.c */
2110 int br_sysfs_addbr(struct net_device *dev);
2111 void br_sysfs_delbr(struct net_device *dev);
2112
2113 #else
2114
2115 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2116 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2117 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2118 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2119 #endif /* CONFIG_SYSFS */
2120
2121 /* br_switchdev.c */
2122 #ifdef CONFIG_NET_SWITCHDEV
2123 int br_switchdev_port_offload(struct net_bridge_port *p,
2124                               struct net_device *dev, const void *ctx,
2125                               struct notifier_block *atomic_nb,
2126                               struct notifier_block *blocking_nb,
2127                               bool tx_fwd_offload,
2128                               struct netlink_ext_ack *extack);
2129
2130 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2131                                  struct notifier_block *atomic_nb,
2132                                  struct notifier_block *blocking_nb);
2133
2134 int br_switchdev_port_replay(struct net_bridge_port *p,
2135                              struct net_device *dev, const void *ctx,
2136                              struct notifier_block *atomic_nb,
2137                              struct notifier_block *blocking_nb,
2138                              struct netlink_ext_ack *extack);
2139
2140 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2141
2142 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2143
2144 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2145                                              struct sk_buff *skb);
2146 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2147                                               struct sk_buff *skb);
2148 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2149                               struct sk_buff *skb);
2150 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2151                                   const struct sk_buff *skb);
2152 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2153                                unsigned long flags,
2154                                unsigned long mask,
2155                                struct netlink_ext_ack *extack);
2156 void br_switchdev_fdb_notify(struct net_bridge *br,
2157                              const struct net_bridge_fdb_entry *fdb, int type);
2158 void br_switchdev_mdb_notify(struct net_device *dev,
2159                              struct net_bridge_mdb_entry *mp,
2160                              struct net_bridge_port_group *pg,
2161                              int type);
2162 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2163                                bool changed, struct netlink_ext_ack *extack);
2164 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2165 void br_switchdev_init(struct net_bridge *br);
2166
2167 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2168 {
2169         skb->offload_fwd_mark = 0;
2170 }
2171 #else
2172 static inline int
2173 br_switchdev_port_offload(struct net_bridge_port *p,
2174                           struct net_device *dev, const void *ctx,
2175                           struct notifier_block *atomic_nb,
2176                           struct notifier_block *blocking_nb,
2177                           bool tx_fwd_offload,
2178                           struct netlink_ext_ack *extack)
2179 {
2180         return -EOPNOTSUPP;
2181 }
2182
2183 static inline void
2184 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2185                             struct notifier_block *atomic_nb,
2186                             struct notifier_block *blocking_nb)
2187 {
2188 }
2189
2190 static inline int
2191 br_switchdev_port_replay(struct net_bridge_port *p,
2192                          struct net_device *dev, const void *ctx,
2193                          struct notifier_block *atomic_nb,
2194                          struct notifier_block *blocking_nb,
2195                          struct netlink_ext_ack *extack)
2196 {
2197         return -EOPNOTSUPP;
2198 }
2199
2200 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2201 {
2202         return false;
2203 }
2204
2205 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2206 {
2207 }
2208
2209 static inline void
2210 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2211                                         struct sk_buff *skb)
2212 {
2213 }
2214
2215 static inline void
2216 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2217                                          struct sk_buff *skb)
2218 {
2219 }
2220
2221 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2222                                             struct sk_buff *skb)
2223 {
2224 }
2225
2226 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2227                                                 const struct sk_buff *skb)
2228 {
2229         return true;
2230 }
2231
2232 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2233                                              unsigned long flags,
2234                                              unsigned long mask,
2235                                              struct netlink_ext_ack *extack)
2236 {
2237         return 0;
2238 }
2239
2240 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2241                                              u16 flags, bool changed,
2242                                              struct netlink_ext_ack *extack)
2243 {
2244         return -EOPNOTSUPP;
2245 }
2246
2247 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2248 {
2249         return -EOPNOTSUPP;
2250 }
2251
2252 static inline void
2253 br_switchdev_fdb_notify(struct net_bridge *br,
2254                         const struct net_bridge_fdb_entry *fdb, int type)
2255 {
2256 }
2257
2258 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2259                                            struct net_bridge_mdb_entry *mp,
2260                                            struct net_bridge_port_group *pg,
2261                                            int type)
2262 {
2263 }
2264
2265 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2266 {
2267 }
2268
2269 static inline void br_switchdev_init(struct net_bridge *br)
2270 {
2271 }
2272
2273 #endif /* CONFIG_NET_SWITCHDEV */
2274
2275 /* br_arp_nd_proxy.c */
2276 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2277 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2278                               u16 vid, struct net_bridge_port *p);
2279 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2280                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2281 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2282 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2283 #endif