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         struct timer_list               delay_timer;
  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  * @tnode: rhashtable member
 190  * @vid: VLAN id
 191  * @flags: bridge vlan flags
 192  * @priv_flags: private (in-kernel) bridge vlan flags
 193  * @state: STP state (e.g. blocking, learning, forwarding)
 194  * @stats: per-cpu VLAN statistics
 195  * @br: if MASTER flag set, this points to a bridge struct
 196  * @port: if MASTER flag unset, this points to a port struct
 197  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 198  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 199  *          for this VLAN entry
 200  * @tinfo: bridge tunnel info
 201  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
 202  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
 203  *                  context
 204  * @msti: if MASTER flag set, this holds the VLANs MST instance
 205  * @vlist: sorted list of VLAN entries
 206  * @rcu: used for entry destruction
 207  *
 208  * This structure is shared between the global per-VLAN entries contained in
 209  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 210  * the port's rhashtable. The union entries should be interpreted depending on
 211  * the entry flags that are set.
 212  */
 213 struct net_bridge_vlan {
 214         struct rhash_head               vnode;
 215         struct rhash_head               tnode;
 216         u16                             vid;
 217         u16                             flags;
 218         u16                             priv_flags;
 219         u8                              state;
 220         struct pcpu_sw_netstats __percpu *stats;
 221         union {
 222                 struct net_bridge       *br;
 223                 struct net_bridge_port  *port;
 224         };
 225         union {
 226                 refcount_t              refcnt;
 227                 struct net_bridge_vlan  *brvlan;
 228         };
 229
 230         struct br_tunnel_info           tinfo;
 231
 232         union {
 233                 struct net_bridge_mcast         br_mcast_ctx;
 234                 struct net_bridge_mcast_port    port_mcast_ctx;
 235         };
 236
 237         u16                             msti;
 238
 239         struct list_head                vlist;
 240
 241         struct rcu_head                 rcu;
 242 };
 243
 244 /**
 245  * struct net_bridge_vlan_group
 246  *
 247  * @vlan_hash: VLAN entry rhashtable
 248  * @vlan_list: sorted VLAN entry list
 249  * @num_vlans: number of total VLAN entries
 250  * @pvid: PVID VLAN id
 251  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 252  *
 253  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 254  *            primitives because the bridge can have entries in its list which
 255  *            are just for global context but not for filtering, i.e. they have
 256  *            the master flag set but not the brentry flag. If you have to check
 257  *            if there're "real" entries in the bridge please test @num_vlans
 258  */
 259 struct net_bridge_vlan_group {
 260         struct rhashtable               vlan_hash;
 261         struct rhashtable               tunnel_hash;
 262         struct list_head                vlan_list;
 263         u16                             num_vlans;
 264         u16                             pvid;
 265         u8                              pvid_state;
 266 };
 267
 268 /* bridge fdb flags */
 269 enum {
 270         BR_FDB_LOCAL,
 271         BR_FDB_STATIC,
 272         BR_FDB_STICKY,
 273         BR_FDB_ADDED_BY_USER,
 274         BR_FDB_ADDED_BY_EXT_LEARN,
 275         BR_FDB_OFFLOADED,
 276         BR_FDB_NOTIFY,
 277         BR_FDB_NOTIFY_INACTIVE,
 278         BR_FDB_LOCKED,
 279         BR_FDB_DYNAMIC_LEARNED,
 280 };
 281
 282 struct net_bridge_fdb_key {
 283         mac_addr addr;
 284         u16 vlan_id;
 285 };
 286
 287 struct net_bridge_fdb_entry {
 288         struct rhash_head               rhnode;
 289         struct net_bridge_port          *dst;
 290
 291         struct net_bridge_fdb_key       key;
 292         struct hlist_node               fdb_node;
 293         unsigned long                   flags;
 294
 295         /* write-heavy members should not affect lookups */
 296         unsigned long                   updated ____cacheline_aligned_in_smp;
 297         unsigned long                   used;
 298
 299         struct rcu_head                 rcu;
 300 };
 301
 302 struct net_bridge_fdb_flush_desc {
 303         unsigned long                   flags;
 304         unsigned long                   flags_mask;
 305         int                             port_ifindex;
 306         u16                             vlan_id;
 307 };
 308
 309 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 310 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 311 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 312 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 313 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 314
 315 #define PG_SRC_ENT_LIMIT        32
 316
 317 #define BR_SGRP_F_DELETE        BIT(0)
 318 #define BR_SGRP_F_SEND          BIT(1)
 319 #define BR_SGRP_F_INSTALLED     BIT(2)
 320 #define BR_SGRP_F_USER_ADDED    BIT(3)
 321
 322 struct net_bridge_mcast_gc {
 323         struct hlist_node               gc_node;
 324         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 325 };
 326
 327 struct net_bridge_group_src {
 328         struct hlist_node               node;
 329
 330         struct br_ip                    addr;
 331         struct net_bridge_port_group    *pg;
 332         u8                              flags;
 333         u8                              src_query_rexmit_cnt;
 334         struct timer_list               timer;
 335
 336         struct net_bridge               *br;
 337         struct net_bridge_mcast_gc      mcast_gc;
 338         struct rcu_head                 rcu;
 339 };
 340
 341 struct net_bridge_port_group_sg_key {
 342         struct net_bridge_port          *port;
 343         struct br_ip                    addr;
 344 };
 345
 346 struct net_bridge_port_group {
 347         struct net_bridge_port_group __rcu *next;
 348         struct net_bridge_port_group_sg_key key;
 349         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 350         unsigned char                   flags;
 351         unsigned char                   filter_mode;
 352         unsigned char                   grp_query_rexmit_cnt;
 353         unsigned char                   rt_protocol;
 354
 355         struct hlist_head               src_list;
 356         unsigned int                    src_ents;
 357         struct timer_list               timer;
 358         struct timer_list               rexmit_timer;
 359         struct hlist_node               mglist;
 360         struct rb_root                  eht_set_tree;
 361         struct rb_root                  eht_host_tree;
 362
 363         struct rhash_head               rhnode;
 364         struct net_bridge_mcast_gc      mcast_gc;
 365         struct rcu_head                 rcu;
 366 };
 367
 368 struct net_bridge_mdb_entry {
 369         struct rhash_head               rhnode;
 370         struct net_bridge               *br;
 371         struct net_bridge_port_group __rcu *ports;
 372         struct br_ip                    addr;
 373         bool                            host_joined;
 374
 375         struct timer_list               timer;
 376         struct hlist_node               mdb_node;
 377
 378         struct net_bridge_mcast_gc      mcast_gc;
 379         struct rcu_head                 rcu;
 380 };
 381
 382 struct net_bridge_port {
 383         struct net_bridge               *br;
 384         struct net_device               *dev;
 385         netdevice_tracker               dev_tracker;
 386         struct list_head                list;
 387
 388         unsigned long                   flags;
 389 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 390         struct net_bridge_vlan_group    __rcu *vlgrp;
 391 #endif
 392         struct net_bridge_port          __rcu *backup_port;
 393         u32                             backup_nhid;
 394
 395         /* STP */
 396         u8                              priority;
 397         u8                              state;
 398         u16                             port_no;
 399         unsigned char                   topology_change_ack;
 400         unsigned char                   config_pending;
 401         port_id                         port_id;
 402         port_id                         designated_port;
 403         bridge_id                       designated_root;
 404         bridge_id                       designated_bridge;
 405         u32                             path_cost;
 406         u32                             designated_cost;
 407         unsigned long                   designated_age;
 408
 409         struct timer_list               forward_delay_timer;
 410         struct timer_list               hold_timer;
 411         struct timer_list               message_age_timer;
 412         struct kobject                  kobj;
 413         struct rcu_head                 rcu;
 414
 415         struct net_bridge_mcast_port    multicast_ctx;
 416
 417 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 418         struct bridge_mcast_stats       __percpu *mcast_stats;
 419
 420         u32                             multicast_eht_hosts_limit;
 421         u32                             multicast_eht_hosts_cnt;
 422         struct hlist_head               mglist;
 423 #endif
 424
 425 #ifdef CONFIG_SYSFS
 426         char                            sysfs_name[IFNAMSIZ];
 427 #endif
 428
 429 #ifdef CONFIG_NET_POLL_CONTROLLER
 430         struct netpoll                  *np;
 431 #endif
 432 #ifdef CONFIG_NET_SWITCHDEV
 433         /* Identifier used to group ports that share the same switchdev
 434          * hardware domain.
 435          */
 436         int                             hwdom;
 437         int                             offload_count;
 438         struct netdev_phys_item_id      ppid;
 439 #endif
 440         u16                             group_fwd_mask;
 441         u16                             backup_redirected_cnt;
 442
 443         struct bridge_stp_xstats        stp_xstats;
 444 };
 445
 446 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 447
 448 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 449 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 450
 451 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 452 {
 453         return rcu_dereference(dev->rx_handler_data);
 454 }
 455
 456 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 457 {
 458         return netif_is_bridge_port(dev) ?
 459                 rtnl_dereference(dev->rx_handler_data) : NULL;
 460 }
 461
 462 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 463 {
 464         return netif_is_bridge_port(dev) ?
 465                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 466 }
 467
 468 enum net_bridge_opts {
 469         BROPT_VLAN_ENABLED,
 470         BROPT_VLAN_STATS_ENABLED,
 471         BROPT_NF_CALL_IPTABLES,
 472         BROPT_NF_CALL_IP6TABLES,
 473         BROPT_NF_CALL_ARPTABLES,
 474         BROPT_GROUP_ADDR_SET,
 475         BROPT_MULTICAST_ENABLED,
 476         BROPT_MULTICAST_QUERY_USE_IFADDR,
 477         BROPT_MULTICAST_STATS_ENABLED,
 478         BROPT_HAS_IPV6_ADDR,
 479         BROPT_NEIGH_SUPPRESS_ENABLED,
 480         BROPT_MTU_SET_BY_USER,
 481         BROPT_VLAN_STATS_PER_PORT,
 482         BROPT_NO_LL_LEARN,
 483         BROPT_VLAN_BRIDGE_BINDING,
 484         BROPT_MCAST_VLAN_SNOOPING_ENABLED,
 485         BROPT_MST_ENABLED,
 486 };
 487
 488 struct net_bridge {
 489         spinlock_t                      lock;
 490         spinlock_t                      hash_lock;
 491         struct hlist_head               frame_type_list;
 492         struct net_device               *dev;
 493         unsigned long                   options;
 494         /* These fields are accessed on each packet */
 495 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 496         __be16                          vlan_proto;
 497         u16                             default_pvid;
 498         struct net_bridge_vlan_group    __rcu *vlgrp;
 499 #endif
 500
 501         struct rhashtable               fdb_hash_tbl;
 502         struct list_head                port_list;
 503 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 504         union {
 505                 struct rtable           fake_rtable;
 506                 struct rt6_info         fake_rt6_info;
 507         };
 508 #endif
 509         u16                             group_fwd_mask;
 510         u16                             group_fwd_mask_required;
 511
 512         /* STP */
 513         bridge_id                       designated_root;
 514         bridge_id                       bridge_id;
 515         unsigned char                   topology_change;
 516         unsigned char                   topology_change_detected;
 517         u16                             root_port;
 518         unsigned long                   max_age;
 519         unsigned long                   hello_time;
 520         unsigned long                   forward_delay;
 521         unsigned long                   ageing_time;
 522         unsigned long                   bridge_max_age;
 523         unsigned long                   bridge_hello_time;
 524         unsigned long                   bridge_forward_delay;
 525         unsigned long                   bridge_ageing_time;
 526         u32                             root_path_cost;
 527
 528         u8                              group_addr[ETH_ALEN];
 529
 530         enum {
 531                 BR_NO_STP,              /* no spanning tree */
 532                 BR_KERNEL_STP,          /* old STP in kernel */
 533                 BR_USER_STP,            /* new RSTP in userspace */
 534         } stp_enabled;
 535
 536         struct net_bridge_mcast         multicast_ctx;
 537
 538 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 539         struct bridge_mcast_stats       __percpu *mcast_stats;
 540
 541         u32                             hash_max;
 542
 543         spinlock_t                      multicast_lock;
 544
 545         struct rhashtable               mdb_hash_tbl;
 546         struct rhashtable               sg_port_tbl;
 547
 548         struct hlist_head               mcast_gc_list;
 549         struct hlist_head               mdb_list;
 550
 551         struct work_struct              mcast_gc_work;
 552 #endif
 553
 554         struct timer_list               hello_timer;
 555         struct timer_list               tcn_timer;
 556         struct timer_list               topology_change_timer;
 557         struct delayed_work             gc_work;
 558         struct kobject                  *ifobj;
 559         u32                             auto_cnt;
 560
 561         atomic_t                        fdb_n_learned;
 562         u32                             fdb_max_learned;
 563
 564 #ifdef CONFIG_NET_SWITCHDEV
 565         /* Counter used to make sure that hardware domains get unique
 566          * identifiers in case a bridge spans multiple switchdev instances.
 567          */
 568         int                             last_hwdom;
 569         /* Bit mask of hardware domain numbers in use */
 570         unsigned long                   busy_hwdoms;
 571 #endif
 572         struct hlist_head               fdb_list;
 573
 574 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 575         struct hlist_head               mrp_list;
 576 #endif
 577 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 578         struct hlist_head               mep_list;
 579 #endif
 580 };
 581
 582 struct br_input_skb_cb {
 583         struct net_device *brdev;
 584
 585         u16 frag_max_size;
 586 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 587         u8 igmp;
 588         u8 mrouters_only:1;
 589 #endif
 590         u8 proxyarp_replied:1;
 591         u8 src_port_isolated:1;
 592         u8 promisc:1;
 593 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 594         u8 vlan_filtered:1;
 595 #endif
 596 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 597         u8 br_netfilter_broute:1;
 598 #endif
 599
 600 #ifdef CONFIG_NET_SWITCHDEV
 601         /* Set if TX data plane offloading is used towards at least one
 602          * hardware domain.
 603          */
 604         u8 tx_fwd_offload:1;
 605         /* The switchdev hardware domain from which this packet was received.
 606          * If skb->offload_fwd_mark was set, then this packet was already
 607          * forwarded by hardware to the other ports in the source hardware
 608          * domain, otherwise it wasn't.
 609          */
 610         int src_hwdom;
 611         /* Bit mask of hardware domains towards this packet has already been
 612          * transmitted using the TX data plane offload.
 613          */
 614         unsigned long fwd_hwdoms;
 615 #endif
 616
 617         u32 backup_nhid;
 618 };
 619
 620 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 621
 622 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 623 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 624 #else
 625 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 626 #endif
 627
 628 #define br_printk(level, br, format, args...)   \
 629         printk(level "%s: " format, (br)->dev->name, ##args)
 630
 631 #define br_err(__br, format, args...)                   \
 632         br_printk(KERN_ERR, __br, format, ##args)
 633 #define br_warn(__br, format, args...)                  \
 634         br_printk(KERN_WARNING, __br, format, ##args)
 635 #define br_notice(__br, format, args...)                \
 636         br_printk(KERN_NOTICE, __br, format, ##args)
 637 #define br_info(__br, format, args...)                  \
 638         br_printk(KERN_INFO, __br, format, ##args)
 639
 640 #define br_debug(br, format, args...)                   \
 641         pr_debug("%s: " format,  (br)->dev->name, ##args)
 642
 643 /* called under bridge lock */
 644 static inline int br_is_root_bridge(const struct net_bridge *br)
 645 {
 646         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 647 }
 648
 649 /* check if a VLAN entry is global */
 650 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 651 {
 652         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 653 }
 654
 655 /* check if a VLAN entry is used by the bridge */
 656 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 657 {
 658         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 659 }
 660
 661 /* check if we should use the vlan entry, returns false if it's only context */
 662 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 663 {
 664         if (br_vlan_is_master(v)) {
 665                 if (br_vlan_is_brentry(v))
 666                         return true;
 667                 else
 668                         return false;
 669         }
 670
 671         return true;
 672 }
 673
 674 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 675 {
 676         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 677 }
 678
 679 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 680 {
 681         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 682
 683         if (!ret)
 684                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 685
 686         return ret;
 687 }
 688
 689 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 690                                        const struct bridge_vlan_info *last,
 691                                        struct netlink_ext_ack *extack)
 692 {
 693         /* pvid flag is not allowed in ranges */
 694         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 695                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 696                 return false;
 697         }
 698
 699         /* when cur is the range end, check if:
 700          *  - it has range start flag
 701          *  - range ids are invalid (end is equal to or before start)
 702          */
 703         if (last) {
 704                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 705                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 706                         return false;
 707                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 708                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 709                         return false;
 710                 } else if (cur->vid <= last->vid) {
 711                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 712                         return false;
 713                 }
 714         }
 715
 716         /* check for required range flags */
 717         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 718                             BRIDGE_VLAN_INFO_RANGE_END))) {
 719                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 720                 return false;
 721         }
 722
 723         return true;
 724 }
 725
 726 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 727 {
 728         u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 729
 730 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 731         if (!br_vlan_is_master(v))
 732                 mcast_router = v->port_mcast_ctx.multicast_router;
 733         else
 734                 mcast_router = v->br_mcast_ctx.multicast_router;
 735 #endif
 736
 737         return mcast_router;
 738 }
 739
 740 static inline int br_afspec_cmd_to_rtm(int cmd)
 741 {
 742         switch (cmd) {
 743         case RTM_SETLINK:
 744                 return RTM_NEWVLAN;
 745         case RTM_DELLINK:
 746                 return RTM_DELVLAN;
 747         }
 748
 749         return 0;
 750 }
 751
 752 static inline int br_opt_get(const struct net_bridge *br,
 753                              enum net_bridge_opts opt)
 754 {
 755         return test_bit(opt, &br->options);
 756 }
 757
 758 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 759                       struct netlink_ext_ack *extack);
 760 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 761 int br_boolopt_multi_toggle(struct net_bridge *br,
 762                             struct br_boolopt_multi *bm,
 763                             struct netlink_ext_ack *extack);
 764 void br_boolopt_multi_get(const struct net_bridge *br,
 765                           struct br_boolopt_multi *bm);
 766 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 767
 768 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 769 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 770 {
 771         struct tc_skb_ext *ext;
 772
 773         if (!tc_skb_ext_tc_enabled())
 774                 return;
 775
 776         ext = skb_ext_find(skb, TC_SKB_EXT);
 777         if (ext) {
 778                 ext->l2_miss = miss;
 779                 return;
 780         }
 781         if (!miss)
 782                 return;
 783         ext = tc_skb_ext_alloc(skb);
 784         if (!ext)
 785                 return;
 786         ext->l2_miss = true;
 787 }
 788 #else
 789 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 790 {
 791 }
 792 #endif
 793
 794 /* br_device.c */
 795 void br_dev_setup(struct net_device *dev);
 796 void br_dev_delete(struct net_device *dev, struct list_head *list);
 797 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 798 #ifdef CONFIG_NET_POLL_CONTROLLER
 799 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 800                                        struct sk_buff *skb)
 801 {
 802         netpoll_send_skb(p->np, skb);
 803 }
 804
 805 int br_netpoll_enable(struct net_bridge_port *p);
 806 void br_netpoll_disable(struct net_bridge_port *p);
 807 #else
 808 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 809                                        struct sk_buff *skb)
 810 {
 811 }
 812
 813 static inline int br_netpoll_enable(struct net_bridge_port *p)
 814 {
 815         return 0;
 816 }
 817
 818 static inline void br_netpoll_disable(struct net_bridge_port *p)
 819 {
 820 }
 821 #endif
 822
 823 /* br_fdb.c */
 824 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 825 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 826 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 827                                      NTF_STICKY | NTF_OFFLOADED)
 828
 829 int br_fdb_init(void);
 830 void br_fdb_fini(void);
 831 int br_fdb_hash_init(struct net_bridge *br);
 832 void br_fdb_hash_fini(struct net_bridge *br);
 833 void br_fdb_flush(struct net_bridge *br,
 834                   const struct net_bridge_fdb_flush_desc *desc);
 835 void br_fdb_find_delete_local(struct net_bridge *br,
 836                               const struct net_bridge_port *p,
 837                               const unsigned char *addr, u16 vid);
 838 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 839 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 840 void br_fdb_cleanup(struct work_struct *work);
 841 void br_fdb_delete_by_port(struct net_bridge *br,
 842                            const struct net_bridge_port *p, u16 vid, int do_all);
 843 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 844                                              const unsigned char *addr,
 845                                              __u16 vid);
 846 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 847 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 848                    unsigned long off);
 849 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 850                      const unsigned char *addr, u16 vid);
 851 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 852                    const unsigned char *addr, u16 vid, unsigned long flags);
 853
 854 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 855                   struct net_device *dev, const unsigned char *addr, u16 vid,
 856                   struct netlink_ext_ack *extack);
 857 int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
 858                        struct netlink_ext_ack *extack);
 859 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 860                const unsigned char *addr, u16 vid, u16 nlh_flags,
 861                struct netlink_ext_ack *extack);
 862 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 863                 struct net_device *dev, struct net_device *fdev, int *idx);
 864 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 865                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 866                struct netlink_ext_ack *extack);
 867 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 868 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 869 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 870                               const unsigned char *addr, u16 vid,
 871                               bool locked, bool swdev_notify);
 872 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 873                               const unsigned char *addr, u16 vid,
 874                               bool swdev_notify);
 875 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 876                           const unsigned char *addr, u16 vid, bool offloaded);
 877
 878 /* br_forward.c */
 879 enum br_pkt_type {
 880         BR_PKT_UNICAST,
 881         BR_PKT_MULTICAST,
 882         BR_PKT_BROADCAST
 883 };
 884 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 885 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 886                 bool local_rcv, bool local_orig);
 887 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 888 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 889               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
 890               u16 vid);
 891
 892 /* return true if both source port and dest port are isolated */
 893 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 894                                    const struct sk_buff *skb)
 895 {
 896         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 897                (to->flags & BR_ISOLATED);
 898 }
 899
 900 /* br_if.c */
 901 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 902 int br_add_bridge(struct net *net, const char *name);
 903 int br_del_bridge(struct net *net, const char *name);
 904 int br_add_if(struct net_bridge *br, struct net_device *dev,
 905               struct netlink_ext_ack *extack);
 906 int br_del_if(struct net_bridge *br, struct net_device *dev);
 907 void br_mtu_auto_adjust(struct net_bridge *br);
 908 netdev_features_t br_features_recompute(struct net_bridge *br,
 909                                         netdev_features_t features);
 910 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 911 void br_manage_promisc(struct net_bridge *br);
 912 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 913
 914 /* br_input.c */
 915 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 916 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 917
 918 struct br_frame_type {
 919         __be16                  type;
 920         int                     (*frame_handler)(struct net_bridge_port *port,
 921                                                  struct sk_buff *skb);
 922         struct hlist_node       list;
 923 };
 924
 925 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 926 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 927
 928 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 929 {
 930         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 931 }
 932
 933 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 934 {
 935         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 936 }
 937
 938 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 939 {
 940         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 941 }
 942
 943 static inline struct net_bridge_port *
 944 br_port_get_check_rtnl(const struct net_device *dev)
 945 {
 946         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 947 }
 948
 949 /* br_ioctl.c */
 950 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 951                           void __user *data, int cmd);
 952 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 953                   struct ifreq *ifr, void __user *uarg);
 954
 955 /* br_multicast.c */
 956 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 957 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 958                      struct net_bridge_mcast_port **pmctx,
 959                      struct net_bridge_vlan *vlan,
 960                      struct sk_buff *skb, u16 vid);
 961 struct net_bridge_mdb_entry *
 962 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
 963                      u16 vid);
 964 int br_multicast_add_port(struct net_bridge_port *port);
 965 void br_multicast_del_port(struct net_bridge_port *port);
 966 void br_multicast_enable_port(struct net_bridge_port *port);
 967 void br_multicast_disable_port(struct net_bridge_port *port);
 968 void br_multicast_init(struct net_bridge *br);
 969 void br_multicast_join_snoopers(struct net_bridge *br);
 970 void br_multicast_leave_snoopers(struct net_bridge *br);
 971 void br_multicast_open(struct net_bridge *br);
 972 void br_multicast_stop(struct net_bridge *br);
 973 void br_multicast_dev_del(struct net_bridge *br);
 974 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 975                         struct net_bridge_mcast *brmctx,
 976                         bool local_rcv, bool local_orig);
 977 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 978 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 979                                  unsigned long val);
 980 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 981 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 982                         struct netlink_ext_ack *extack);
 983 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 984 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 985                                   unsigned long val);
 986 #if IS_ENABLED(CONFIG_IPV6)
 987 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 988                                  unsigned long val);
 989 #endif
 990 struct net_bridge_mdb_entry *
 991 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 992 struct net_bridge_mdb_entry *
 993 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 994 struct net_bridge_port_group *
 995 br_multicast_new_port_group(struct net_bridge_port *port,
 996                             const struct br_ip *group,
 997                             struct net_bridge_port_group __rcu *next,
 998                             unsigned char flags, const unsigned char *src,
 999                             u8 filter_mode, u8 rt_protocol,
1000                             struct netlink_ext_ack *extack);
1001 void br_multicast_del_port_group(struct net_bridge_port_group *p);
1002 int br_mdb_hash_init(struct net_bridge *br);
1003 void br_mdb_hash_fini(struct net_bridge *br);
1004 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1005                    struct net_bridge_port_group *pg, int type);
1006 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1007                    int type);
1008 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1009                          struct net_bridge_port_group *pg,
1010                          struct net_bridge_port_group __rcu **pp);
1011 void br_multicast_count(struct net_bridge *br,
1012                         const struct net_bridge_port *p,
1013                         const struct sk_buff *skb, u8 type, u8 dir);
1014 int br_multicast_init_stats(struct net_bridge *br);
1015 void br_multicast_uninit_stats(struct net_bridge *br);
1016 void br_multicast_get_stats(const struct net_bridge *br,
1017                             const struct net_bridge_port *p,
1018                             struct br_mcast_stats *dest);
1019 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1020 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1021 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1022 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1023                struct netlink_ext_ack *extack);
1024 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1025                struct netlink_ext_ack *extack);
1026 int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1027                     struct netlink_ext_ack *extack);
1028 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1029                 struct netlink_callback *cb);
1030 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1031                struct netlink_ext_ack *extack);
1032 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1033                             struct net_bridge_mdb_entry *mp, bool notify);
1034 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1035 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1036                                      u8 filter_mode);
1037 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1038                                        struct net_bridge_port_group *sg);
1039 struct net_bridge_group_src *
1040 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1041 struct net_bridge_group_src *
1042 br_multicast_new_group_src(struct net_bridge_port_group *pg,
1043                            struct br_ip *src_ip);
1044 void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1045 void br_multicast_del_group_src(struct net_bridge_group_src *src,
1046                                 bool fastleave);
1047 void br_multicast_ctx_init(struct net_bridge *br,
1048                            struct net_bridge_vlan *vlan,
1049                            struct net_bridge_mcast *brmctx);
1050 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1051 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1052                                 struct net_bridge_vlan *vlan,
1053                                 struct net_bridge_mcast_port *pmctx);
1054 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1055 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1056 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1057                                       struct netlink_ext_ack *extack);
1058 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1059
1060 int br_rports_fill_info(struct sk_buff *skb,
1061                         const struct net_bridge_mcast *brmctx);
1062 int br_multicast_dump_querier_state(struct sk_buff *skb,
1063                                     const struct net_bridge_mcast *brmctx,
1064                                     int nest_attr);
1065 size_t br_multicast_querier_state_size(void);
1066 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1067 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1068                                   unsigned long val);
1069 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1070                                           unsigned long val);
1071
1072 static inline bool br_group_is_l2(const struct br_ip *group)
1073 {
1074         return group->proto == 0;
1075 }
1076
1077 #define mlock_dereference(X, br) \
1078         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1079
1080 static inline struct hlist_node *
1081 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1082                                   struct sk_buff *skb)
1083 {
1084 #if IS_ENABLED(CONFIG_IPV6)
1085         if (skb->protocol == htons(ETH_P_IPV6))
1086                 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1087 #endif
1088         return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1089 }
1090
1091 static inline struct net_bridge_port *
1092 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1093 {
1094         struct net_bridge_mcast_port *mctx;
1095
1096 #if IS_ENABLED(CONFIG_IPV6)
1097         if (skb->protocol == htons(ETH_P_IPV6))
1098                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1099                                         ip6_rlist);
1100         else
1101 #endif
1102                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1103                                         ip4_rlist);
1104
1105         if (mctx)
1106                 return mctx->port;
1107         else
1108                 return NULL;
1109 }
1110
1111 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1112 {
1113         return timer_pending(&brmctx->ip4_mc_router_timer);
1114 }
1115
1116 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1117 {
1118 #if IS_ENABLED(CONFIG_IPV6)
1119         return timer_pending(&brmctx->ip6_mc_router_timer);
1120 #else
1121         return false;
1122 #endif
1123 }
1124
1125 static inline bool
1126 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1127 {
1128         switch (brmctx->multicast_router) {
1129         case MDB_RTR_TYPE_PERM:
1130                 return true;
1131         case MDB_RTR_TYPE_TEMP_QUERY:
1132                 if (skb) {
1133                         if (skb->protocol == htons(ETH_P_IP))
1134                                 return br_ip4_multicast_is_router(brmctx);
1135                         else if (skb->protocol == htons(ETH_P_IPV6))
1136                                 return br_ip6_multicast_is_router(brmctx);
1137                 } else {
1138                         return br_ip4_multicast_is_router(brmctx) ||
1139                                br_ip6_multicast_is_router(brmctx);
1140                 }
1141                 fallthrough;
1142         default:
1143                 return false;
1144         }
1145 }
1146
1147 static inline bool
1148 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1149                               struct bridge_mcast_other_query *querier,
1150                               const bool is_ipv6)
1151 {
1152         bool own_querier_enabled;
1153
1154         if (brmctx->multicast_querier) {
1155                 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1156                         own_querier_enabled = false;
1157                 else
1158                         own_querier_enabled = true;
1159         } else {
1160                 own_querier_enabled = false;
1161         }
1162
1163         return !timer_pending(&querier->delay_timer) &&
1164                (own_querier_enabled || timer_pending(&querier->timer));
1165 }
1166
1167 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1168                                                struct ethhdr *eth,
1169                                                const struct net_bridge_mdb_entry *mdb)
1170 {
1171         switch (eth->h_proto) {
1172         case (htons(ETH_P_IP)):
1173                 return __br_multicast_querier_exists(brmctx,
1174                         &brmctx->ip4_other_query, false);
1175 #if IS_ENABLED(CONFIG_IPV6)
1176         case (htons(ETH_P_IPV6)):
1177                 return __br_multicast_querier_exists(brmctx,
1178                         &brmctx->ip6_other_query, true);
1179 #endif
1180         default:
1181                 return !!mdb && br_group_is_l2(&mdb->addr);
1182         }
1183 }
1184
1185 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1186 {
1187         switch (ip->proto) {
1188         case htons(ETH_P_IP):
1189                 return ipv4_is_zeronet(ip->src.ip4);
1190 #if IS_ENABLED(CONFIG_IPV6)
1191         case htons(ETH_P_IPV6):
1192                 return ipv6_addr_any(&ip->src.ip6);
1193 #endif
1194         default:
1195                 return false;
1196         }
1197 }
1198
1199 static inline bool
1200 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1201                                 __be16 proto)
1202 {
1203         switch (proto) {
1204         case htons(ETH_P_IP):
1205                 return !!(brmctx->multicast_igmp_version == 3);
1206 #if IS_ENABLED(CONFIG_IPV6)
1207         case htons(ETH_P_IPV6):
1208                 return !!(brmctx->multicast_mld_version == 2);
1209 #endif
1210         default:
1211                 return false;
1212         }
1213 }
1214
1215 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1216 {
1217         return BR_INPUT_SKB_CB(skb)->igmp;
1218 }
1219
1220 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1221 {
1222         return brmctx->multicast_last_member_interval *
1223                brmctx->multicast_last_member_count;
1224 }
1225
1226 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1227 {
1228         return brmctx->multicast_membership_interval;
1229 }
1230
1231 static inline bool
1232 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1233 {
1234         return !!brmctx->vlan;
1235 }
1236
1237 static inline bool
1238 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1239 {
1240         return !!pmctx->vlan;
1241 }
1242
1243 static inline struct net_bridge_mcast *
1244 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1245 {
1246         if (!br_multicast_port_ctx_is_vlan(pmctx))
1247                 return &pmctx->port->br->multicast_ctx;
1248         else
1249                 return &pmctx->vlan->brvlan->br_mcast_ctx;
1250 }
1251
1252 static inline bool
1253 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1254 {
1255         return br_multicast_ctx_is_vlan(brmctx) &&
1256                (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1257                 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1258 }
1259
1260 static inline bool
1261 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1262 {
1263         return br_multicast_ctx_is_vlan(brmctx) &&
1264                !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1265 }
1266
1267 static inline bool
1268 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1269 {
1270         return br_multicast_port_ctx_is_vlan(pmctx) &&
1271                !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1272 }
1273
1274 static inline bool
1275 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1276 {
1277         return pmctx->port->state == BR_STATE_DISABLED ||
1278                (br_multicast_port_ctx_is_vlan(pmctx) &&
1279                 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1280                  pmctx->vlan->state == BR_STATE_DISABLED));
1281 }
1282
1283 static inline bool
1284 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1285 {
1286         return br_multicast_port_ctx_state_disabled(pmctx) ||
1287                pmctx->port->state == BR_STATE_BLOCKING ||
1288                (br_multicast_port_ctx_is_vlan(pmctx) &&
1289                 pmctx->vlan->state == BR_STATE_BLOCKING);
1290 }
1291
1292 static inline bool
1293 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1294 {
1295 #if IS_ENABLED(CONFIG_IPV6)
1296         return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1297                !hlist_empty(&brmctx->ip6_mc_router_list);
1298 #else
1299         return !hlist_empty(&brmctx->ip4_mc_router_list);
1300 #endif
1301 }
1302
1303 static inline bool
1304 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1305                                const struct net_bridge_mcast *brmctx2)
1306 {
1307         return brmctx1->multicast_igmp_version ==
1308                brmctx2->multicast_igmp_version &&
1309                brmctx1->multicast_last_member_count ==
1310                brmctx2->multicast_last_member_count &&
1311                brmctx1->multicast_startup_query_count ==
1312                brmctx2->multicast_startup_query_count &&
1313                brmctx1->multicast_last_member_interval ==
1314                brmctx2->multicast_last_member_interval &&
1315                brmctx1->multicast_membership_interval ==
1316                brmctx2->multicast_membership_interval &&
1317                brmctx1->multicast_querier_interval ==
1318                brmctx2->multicast_querier_interval &&
1319                brmctx1->multicast_query_interval ==
1320                brmctx2->multicast_query_interval &&
1321                brmctx1->multicast_query_response_interval ==
1322                brmctx2->multicast_query_response_interval &&
1323                brmctx1->multicast_startup_query_interval ==
1324                brmctx2->multicast_startup_query_interval &&
1325                brmctx1->multicast_querier == brmctx2->multicast_querier &&
1326                brmctx1->multicast_router == brmctx2->multicast_router &&
1327                !br_rports_have_mc_router(brmctx1) &&
1328                !br_rports_have_mc_router(brmctx2) &&
1329 #if IS_ENABLED(CONFIG_IPV6)
1330                brmctx1->multicast_mld_version ==
1331                brmctx2->multicast_mld_version &&
1332 #endif
1333                true;
1334 }
1335
1336 static inline bool
1337 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1338 {
1339         bool vlan_snooping_enabled;
1340
1341         vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1342                                              BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1343
1344         return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1345 }
1346 #else
1347 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1348                                    struct net_bridge_mcast_port **pmctx,
1349                                    struct net_bridge_vlan *vlan,
1350                                    struct sk_buff *skb,
1351                                    u16 vid)
1352 {
1353         return 0;
1354 }
1355
1356 static inline struct net_bridge_mdb_entry *
1357 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1358                      u16 vid)
1359 {
1360         return NULL;
1361 }
1362
1363 static inline int br_multicast_add_port(struct net_bridge_port *port)
1364 {
1365         return 0;
1366 }
1367
1368 static inline void br_multicast_del_port(struct net_bridge_port *port)
1369 {
1370 }
1371
1372 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1373 {
1374 }
1375
1376 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1377 {
1378 }
1379
1380 static inline void br_multicast_init(struct net_bridge *br)
1381 {
1382 }
1383
1384 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1385 {
1386 }
1387
1388 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1389 {
1390 }
1391
1392 static inline void br_multicast_open(struct net_bridge *br)
1393 {
1394 }
1395
1396 static inline void br_multicast_stop(struct net_bridge *br)
1397 {
1398 }
1399
1400 static inline void br_multicast_dev_del(struct net_bridge *br)
1401 {
1402 }
1403
1404 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1405                                       struct sk_buff *skb,
1406                                       struct net_bridge_mcast *brmctx,
1407                                       bool local_rcv, bool local_orig)
1408 {
1409 }
1410
1411 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1412                                           struct sk_buff *skb)
1413 {
1414         return false;
1415 }
1416
1417 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1418                                                struct ethhdr *eth,
1419                                                const struct net_bridge_mdb_entry *mdb)
1420 {
1421         return false;
1422 }
1423
1424 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1425                              u16 nlmsg_flags, struct netlink_ext_ack *extack)
1426 {
1427         return -EOPNOTSUPP;
1428 }
1429
1430 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1431                              struct netlink_ext_ack *extack)
1432 {
1433         return -EOPNOTSUPP;
1434 }
1435
1436 static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1437                                   struct netlink_ext_ack *extack)
1438 {
1439         return -EOPNOTSUPP;
1440 }
1441
1442 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1443                               struct netlink_callback *cb)
1444 {
1445         return 0;
1446 }
1447
1448 static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1449                              u32 portid, u32 seq,
1450                              struct netlink_ext_ack *extack)
1451 {
1452         return -EOPNOTSUPP;
1453 }
1454
1455 static inline int br_mdb_hash_init(struct net_bridge *br)
1456 {
1457         return 0;
1458 }
1459
1460 static inline void br_mdb_hash_fini(struct net_bridge *br)
1461 {
1462 }
1463
1464 static inline void br_multicast_count(struct net_bridge *br,
1465                                       const struct net_bridge_port *p,
1466                                       const struct sk_buff *skb,
1467                                       u8 type, u8 dir)
1468 {
1469 }
1470
1471 static inline int br_multicast_init_stats(struct net_bridge *br)
1472 {
1473         return 0;
1474 }
1475
1476 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1477 {
1478 }
1479
1480 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1481 {
1482         return 0;
1483 }
1484
1485 static inline void br_multicast_ctx_init(struct net_bridge *br,
1486                                          struct net_bridge_vlan *vlan,
1487                                          struct net_bridge_mcast *brmctx)
1488 {
1489 }
1490
1491 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1492 {
1493 }
1494
1495 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1496                                               struct net_bridge_vlan *vlan,
1497                                               struct net_bridge_mcast_port *pmctx)
1498 {
1499 }
1500
1501 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1502 {
1503 }
1504
1505 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1506                                                 bool on)
1507 {
1508 }
1509
1510 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1511                                                     bool on,
1512                                                     struct netlink_ext_ack *extack)
1513 {
1514         return -EOPNOTSUPP;
1515 }
1516
1517 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1518                                                    bool on)
1519 {
1520         return false;
1521 }
1522
1523 static inline bool
1524 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1525                                const struct net_bridge_mcast *brmctx2)
1526 {
1527         return true;
1528 }
1529 #endif
1530
1531 /* br_vlan.c */
1532 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1533 bool br_allowed_ingress(const struct net_bridge *br,
1534                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1535                         u16 *vid, u8 *state,
1536                         struct net_bridge_vlan **vlan);
1537 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1538                        const struct sk_buff *skb);
1539 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1540 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1541                                const struct net_bridge_port *port,
1542                                struct net_bridge_vlan_group *vg,
1543                                struct sk_buff *skb);
1544 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1545                 bool *changed, struct netlink_ext_ack *extack);
1546 int br_vlan_delete(struct net_bridge *br, u16 vid);
1547 void br_vlan_flush(struct net_bridge *br);
1548 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1549 void br_recalculate_fwd_mask(struct net_bridge *br);
1550 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1551                           struct netlink_ext_ack *extack);
1552 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1553                         struct netlink_ext_ack *extack);
1554 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1555                       struct netlink_ext_ack *extack);
1556 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1557 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1558 int br_vlan_init(struct net_bridge *br);
1559 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1560                              struct netlink_ext_ack *extack);
1561 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1562                                struct netlink_ext_ack *extack);
1563 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1564                  bool *changed, struct netlink_ext_ack *extack);
1565 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1566 void nbp_vlan_flush(struct net_bridge_port *port);
1567 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1568 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1569 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1570                        struct pcpu_sw_netstats *stats);
1571 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1572 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1573                          void *ptr);
1574 void br_vlan_rtnl_init(void);
1575 void br_vlan_rtnl_uninit(void);
1576 void br_vlan_notify(const struct net_bridge *br,
1577                     const struct net_bridge_port *p,
1578                     u16 vid, u16 vid_range,
1579                     int cmd);
1580 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1581                              const struct net_bridge_vlan *range_end);
1582
1583 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1584                                     struct net_device_path_ctx *ctx,
1585                                     struct net_device_path *path);
1586 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1587                                    struct net_bridge_port *dst,
1588                                    struct net_device_path *path);
1589
1590 static inline struct net_bridge_vlan_group *br_vlan_group(
1591                                         const struct net_bridge *br)
1592 {
1593         return rtnl_dereference(br->vlgrp);
1594 }
1595
1596 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1597                                         const struct net_bridge_port *p)
1598 {
1599         return rtnl_dereference(p->vlgrp);
1600 }
1601
1602 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1603                                         const struct net_bridge *br)
1604 {
1605         return rcu_dereference(br->vlgrp);
1606 }
1607
1608 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1609                                         const struct net_bridge_port *p)
1610 {
1611         return rcu_dereference(p->vlgrp);
1612 }
1613
1614 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1615  * skb, the vlan tag will always be present if the frame was tagged.
1616  */
1617 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1618 {
1619         int err = 0;
1620
1621         if (skb_vlan_tag_present(skb)) {
1622                 *vid = skb_vlan_tag_get_id(skb);
1623         } else {
1624                 *vid = 0;
1625                 err = -EINVAL;
1626         }
1627
1628         return err;
1629 }
1630
1631 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1632 {
1633         if (!vg)
1634                 return 0;
1635
1636         smp_rmb();
1637         return vg->pvid;
1638 }
1639
1640 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1641 {
1642         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1643 }
1644 #else
1645 static inline bool br_allowed_ingress(const struct net_bridge *br,
1646                                       struct net_bridge_vlan_group *vg,
1647                                       struct sk_buff *skb,
1648                                       u16 *vid, u8 *state,
1649                                       struct net_bridge_vlan **vlan)
1650
1651 {
1652         *vlan = NULL;
1653         return true;
1654 }
1655
1656 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1657                                      const struct sk_buff *skb)
1658 {
1659         return true;
1660 }
1661
1662 static inline bool br_should_learn(struct net_bridge_port *p,
1663                                    struct sk_buff *skb, u16 *vid)
1664 {
1665         return true;
1666 }
1667
1668 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1669                                              const struct net_bridge_port *port,
1670                                              struct net_bridge_vlan_group *vg,
1671                                              struct sk_buff *skb)
1672 {
1673         return skb;
1674 }
1675
1676 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1677                               bool *changed, struct netlink_ext_ack *extack)
1678 {
1679         *changed = false;
1680         return -EOPNOTSUPP;
1681 }
1682
1683 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1684 {
1685         return -EOPNOTSUPP;
1686 }
1687
1688 static inline void br_vlan_flush(struct net_bridge *br)
1689 {
1690 }
1691
1692 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1693 {
1694 }
1695
1696 static inline int br_vlan_init(struct net_bridge *br)
1697 {
1698         return 0;
1699 }
1700
1701 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1702                                bool *changed, struct netlink_ext_ack *extack)
1703 {
1704         *changed = false;
1705         return -EOPNOTSUPP;
1706 }
1707
1708 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1709 {
1710         return -EOPNOTSUPP;
1711 }
1712
1713 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1714 {
1715 }
1716
1717 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1718                                                    u16 vid)
1719 {
1720         return NULL;
1721 }
1722
1723 static inline int nbp_vlan_init(struct net_bridge_port *port,
1724                                 struct netlink_ext_ack *extack)
1725 {
1726         return 0;
1727 }
1728
1729 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1730 {
1731         return 0;
1732 }
1733
1734 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1735 {
1736         return 0;
1737 }
1738
1739 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1740                                         unsigned long val,
1741                                         struct netlink_ext_ack *extack)
1742 {
1743         return -EOPNOTSUPP;
1744 }
1745
1746 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1747                                          u32 filter_mask)
1748 {
1749         return 0;
1750 }
1751
1752 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1753                                                   struct net_device_path_ctx *ctx,
1754                                                   struct net_device_path *path)
1755 {
1756 }
1757
1758 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1759                                                  struct net_bridge_port *dst,
1760                                                  struct net_device_path *path)
1761 {
1762         return 0;
1763 }
1764
1765 static inline struct net_bridge_vlan_group *br_vlan_group(
1766                                         const struct net_bridge *br)
1767 {
1768         return NULL;
1769 }
1770
1771 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1772                                         const struct net_bridge_port *p)
1773 {
1774         return NULL;
1775 }
1776
1777 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1778                                         const struct net_bridge *br)
1779 {
1780         return NULL;
1781 }
1782
1783 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1784                                         const struct net_bridge_port *p)
1785 {
1786         return NULL;
1787 }
1788
1789 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1790                                      struct pcpu_sw_netstats *stats)
1791 {
1792 }
1793
1794 static inline void br_vlan_port_event(struct net_bridge_port *p,
1795                                       unsigned long event)
1796 {
1797 }
1798
1799 static inline int br_vlan_bridge_event(struct net_device *dev,
1800                                        unsigned long event, void *ptr)
1801 {
1802         return 0;
1803 }
1804
1805 static inline void br_vlan_rtnl_init(void)
1806 {
1807 }
1808
1809 static inline void br_vlan_rtnl_uninit(void)
1810 {
1811 }
1812
1813 static inline void br_vlan_notify(const struct net_bridge *br,
1814                                   const struct net_bridge_port *p,
1815                                   u16 vid, u16 vid_range,
1816                                   int cmd)
1817 {
1818 }
1819
1820 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1821                                            const struct net_bridge_vlan *range_end)
1822 {
1823         return true;
1824 }
1825
1826 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1827 {
1828         return 0;
1829 }
1830
1831 #endif
1832
1833 /* br_vlan_options.c */
1834 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1835 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1836                            const struct net_bridge_vlan *range_end);
1837 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1838                        const struct net_bridge_port *p);
1839 size_t br_vlan_opts_nl_size(void);
1840 int br_vlan_process_options(const struct net_bridge *br,
1841                             const struct net_bridge_port *p,
1842                             struct net_bridge_vlan *range_start,
1843                             struct net_bridge_vlan *range_end,
1844                             struct nlattr **tb,
1845                             struct netlink_ext_ack *extack);
1846 int br_vlan_rtm_process_global_options(struct net_device *dev,
1847                                        const struct nlattr *attr,
1848                                        int cmd,
1849                                        struct netlink_ext_ack *extack);
1850 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1851                                          const struct net_bridge_vlan *r_end);
1852 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1853                               const struct net_bridge_vlan *v_opts);
1854
1855 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1856 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1857 {
1858         return READ_ONCE(v->state);
1859 }
1860
1861 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1862 {
1863         WRITE_ONCE(v->state, state);
1864 }
1865
1866 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1867 {
1868         return READ_ONCE(vg->pvid_state);
1869 }
1870
1871 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1872                                           u8 state)
1873 {
1874         WRITE_ONCE(vg->pvid_state, state);
1875 }
1876
1877 /* learn_allow is true at ingress and false at egress */
1878 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1879 {
1880         switch (state) {
1881         case BR_STATE_LEARNING:
1882                 return learn_allow;
1883         case BR_STATE_FORWARDING:
1884                 return true;
1885         default:
1886                 return false;
1887         }
1888 }
1889 #endif
1890
1891 /* br_mst.c */
1892 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1893 DECLARE_STATIC_KEY_FALSE(br_mst_used);
1894 static inline bool br_mst_is_enabled(struct net_bridge *br)
1895 {
1896         return static_branch_unlikely(&br_mst_used) &&
1897                 br_opt_get(br, BROPT_MST_ENABLED);
1898 }
1899
1900 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1901                      struct netlink_ext_ack *extack);
1902 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1903 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1904 int br_mst_set_enabled(struct net_bridge *br, bool on,
1905                        struct netlink_ext_ack *extack);
1906 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1907 int br_mst_fill_info(struct sk_buff *skb,
1908                      const struct net_bridge_vlan_group *vg);
1909 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1910                    struct netlink_ext_ack *extack);
1911 #else
1912 static inline bool br_mst_is_enabled(struct net_bridge *br)
1913 {
1914         return false;
1915 }
1916
1917 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1918                                    u8 state, struct netlink_ext_ack *extack)
1919 {
1920         return -EOPNOTSUPP;
1921 }
1922
1923 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1924                                      struct netlink_ext_ack *extack)
1925 {
1926         return -EOPNOTSUPP;
1927 }
1928
1929 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1930 {
1931         return 0;
1932 }
1933
1934 static inline int br_mst_fill_info(struct sk_buff *skb,
1935                                    const struct net_bridge_vlan_group *vg)
1936 {
1937         return -EOPNOTSUPP;
1938 }
1939
1940 static inline int br_mst_process(struct net_bridge_port *p,
1941                                  const struct nlattr *mst_attr,
1942                                  struct netlink_ext_ack *extack)
1943 {
1944         return -EOPNOTSUPP;
1945 }
1946 #endif
1947
1948 struct nf_br_ops {
1949         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1950 };
1951 extern const struct nf_br_ops __rcu *nf_br_ops;
1952
1953 /* br_netfilter.c */
1954 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1955 int br_nf_core_init(void);
1956 void br_nf_core_fini(void);
1957 void br_netfilter_rtable_init(struct net_bridge *);
1958 #else
1959 static inline int br_nf_core_init(void) { return 0; }
1960 static inline void br_nf_core_fini(void) {}
1961 #define br_netfilter_rtable_init(x)
1962 #endif
1963
1964 /* br_stp.c */
1965 void br_set_state(struct net_bridge_port *p, unsigned int state);
1966 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1967 void br_init_port(struct net_bridge_port *p);
1968 void br_become_designated_port(struct net_bridge_port *p);
1969
1970 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1971 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1972 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1973 int br_set_max_age(struct net_bridge *br, unsigned long x);
1974 int __set_ageing_time(struct net_device *dev, unsigned long t);
1975 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1976
1977
1978 /* br_stp_if.c */
1979 void br_stp_enable_bridge(struct net_bridge *br);
1980 void br_stp_disable_bridge(struct net_bridge *br);
1981 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1982                        struct netlink_ext_ack *extack);
1983 void br_stp_enable_port(struct net_bridge_port *p);
1984 void br_stp_disable_port(struct net_bridge_port *p);
1985 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1986 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1987 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1988 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1989 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1990 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1991
1992 /* br_stp_bpdu.c */
1993 struct stp_proto;
1994 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1995                 struct net_device *dev);
1996
1997 /* br_stp_timer.c */
1998 void br_stp_timer_init(struct net_bridge *br);
1999 void br_stp_port_timer_init(struct net_bridge_port *p);
2000 unsigned long br_timer_value(const struct timer_list *timer);
2001
2002 /* br.c */
2003 #if IS_ENABLED(CONFIG_ATM_LANE)
2004 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
2005 #endif
2006
2007 /* br_mrp.c */
2008 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
2009 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2010                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2011 bool br_mrp_enabled(struct net_bridge *br);
2012 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2013 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2014 #else
2015 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2016                                struct nlattr *attr, int cmd,
2017                                struct netlink_ext_ack *extack)
2018 {
2019         return -EOPNOTSUPP;
2020 }
2021
2022 static inline bool br_mrp_enabled(struct net_bridge *br)
2023 {
2024         return false;
2025 }
2026
2027 static inline void br_mrp_port_del(struct net_bridge *br,
2028                                    struct net_bridge_port *p)
2029 {
2030 }
2031
2032 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2033 {
2034         return 0;
2035 }
2036
2037 #endif
2038
2039 /* br_cfm.c */
2040 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
2041 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2042                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2043 bool br_cfm_created(struct net_bridge *br);
2044 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2045 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2046 int br_cfm_status_fill_info(struct sk_buff *skb,
2047                             struct net_bridge *br,
2048                             bool getlink);
2049 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2050 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2051 #else
2052 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2053                                struct nlattr *attr, int cmd,
2054                                struct netlink_ext_ack *extack)
2055 {
2056         return -EOPNOTSUPP;
2057 }
2058
2059 static inline bool br_cfm_created(struct net_bridge *br)
2060 {
2061         return false;
2062 }
2063
2064 static inline void br_cfm_port_del(struct net_bridge *br,
2065                                    struct net_bridge_port *p)
2066 {
2067 }
2068
2069 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2070 {
2071         return -EOPNOTSUPP;
2072 }
2073
2074 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2075                                           struct net_bridge *br,
2076                                           bool getlink)
2077 {
2078         return -EOPNOTSUPP;
2079 }
2080
2081 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2082 {
2083         *count = 0;
2084         return -EOPNOTSUPP;
2085 }
2086
2087 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2088 {
2089         *count = 0;
2090         return -EOPNOTSUPP;
2091 }
2092 #endif
2093
2094 /* br_netlink.c */
2095 extern struct rtnl_link_ops br_link_ops;
2096 int br_netlink_init(void);
2097 void br_netlink_fini(void);
2098 void br_ifinfo_notify(int event, const struct net_bridge *br,
2099                       const struct net_bridge_port *port);
2100 void br_info_notify(int event, const struct net_bridge *br,
2101                     const struct net_bridge_port *port, u32 filter);
2102 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2103                struct netlink_ext_ack *extack);
2104 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2105 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2106                u32 filter_mask, int nlflags);
2107 int br_process_vlan_info(struct net_bridge *br,
2108                          struct net_bridge_port *p, int cmd,
2109                          struct bridge_vlan_info *vinfo_curr,
2110                          struct bridge_vlan_info **vinfo_last,
2111                          bool *changed,
2112                          struct netlink_ext_ack *extack);
2113
2114 #ifdef CONFIG_SYSFS
2115 /* br_sysfs_if.c */
2116 extern const struct sysfs_ops brport_sysfs_ops;
2117 int br_sysfs_addif(struct net_bridge_port *p);
2118 int br_sysfs_renameif(struct net_bridge_port *p);
2119
2120 /* br_sysfs_br.c */
2121 int br_sysfs_addbr(struct net_device *dev);
2122 void br_sysfs_delbr(struct net_device *dev);
2123
2124 #else
2125
2126 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2127 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2128 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2129 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2130 #endif /* CONFIG_SYSFS */
2131
2132 /* br_switchdev.c */
2133 #ifdef CONFIG_NET_SWITCHDEV
2134 int br_switchdev_port_offload(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                               bool tx_fwd_offload,
2139                               struct netlink_ext_ack *extack);
2140
2141 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2142                                  struct notifier_block *atomic_nb,
2143                                  struct notifier_block *blocking_nb);
2144
2145 int br_switchdev_port_replay(struct net_bridge_port *p,
2146                              struct net_device *dev, const void *ctx,
2147                              struct notifier_block *atomic_nb,
2148                              struct notifier_block *blocking_nb,
2149                              struct netlink_ext_ack *extack);
2150
2151 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2152
2153 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2154
2155 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2156                                              struct sk_buff *skb);
2157 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2158                                               struct sk_buff *skb);
2159 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2160                               struct sk_buff *skb);
2161 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2162                                   const struct sk_buff *skb);
2163 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2164                                unsigned long flags,
2165                                unsigned long mask,
2166                                struct netlink_ext_ack *extack);
2167 void br_switchdev_fdb_notify(struct net_bridge *br,
2168                              const struct net_bridge_fdb_entry *fdb, int type);
2169 void br_switchdev_mdb_notify(struct net_device *dev,
2170                              struct net_bridge_mdb_entry *mp,
2171                              struct net_bridge_port_group *pg,
2172                              int type);
2173 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2174                                bool changed, struct netlink_ext_ack *extack);
2175 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2176 void br_switchdev_init(struct net_bridge *br);
2177
2178 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2179 {
2180         skb->offload_fwd_mark = 0;
2181 }
2182 #else
2183 static inline int
2184 br_switchdev_port_offload(struct net_bridge_port *p,
2185                           struct net_device *dev, const void *ctx,
2186                           struct notifier_block *atomic_nb,
2187                           struct notifier_block *blocking_nb,
2188                           bool tx_fwd_offload,
2189                           struct netlink_ext_ack *extack)
2190 {
2191         return -EOPNOTSUPP;
2192 }
2193
2194 static inline void
2195 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2196                             struct notifier_block *atomic_nb,
2197                             struct notifier_block *blocking_nb)
2198 {
2199 }
2200
2201 static inline int
2202 br_switchdev_port_replay(struct net_bridge_port *p,
2203                          struct net_device *dev, const void *ctx,
2204                          struct notifier_block *atomic_nb,
2205                          struct notifier_block *blocking_nb,
2206                          struct netlink_ext_ack *extack)
2207 {
2208         return -EOPNOTSUPP;
2209 }
2210
2211 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2212 {
2213         return false;
2214 }
2215
2216 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2217 {
2218 }
2219
2220 static inline void
2221 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2222                                         struct sk_buff *skb)
2223 {
2224 }
2225
2226 static inline void
2227 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2228                                          struct sk_buff *skb)
2229 {
2230 }
2231
2232 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2233                                             struct sk_buff *skb)
2234 {
2235 }
2236
2237 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2238                                                 const struct sk_buff *skb)
2239 {
2240         return true;
2241 }
2242
2243 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2244                                              unsigned long flags,
2245                                              unsigned long mask,
2246                                              struct netlink_ext_ack *extack)
2247 {
2248         return 0;
2249 }
2250
2251 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2252                                              u16 flags, bool changed,
2253                                              struct netlink_ext_ack *extack)
2254 {
2255         return -EOPNOTSUPP;
2256 }
2257
2258 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2259 {
2260         return -EOPNOTSUPP;
2261 }
2262
2263 static inline void
2264 br_switchdev_fdb_notify(struct net_bridge *br,
2265                         const struct net_bridge_fdb_entry *fdb, int type)
2266 {
2267 }
2268
2269 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2270                                            struct net_bridge_mdb_entry *mp,
2271                                            struct net_bridge_port_group *pg,
2272                                            int type)
2273 {
2274 }
2275
2276 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2277 {
2278 }
2279
2280 static inline void br_switchdev_init(struct net_bridge *br)
2281 {
2282 }
2283
2284 #endif /* CONFIG_NET_SWITCHDEV */
2285
2286 /* br_arp_nd_proxy.c */
2287 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2288 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2289                               u16 vid, struct net_bridge_port *p);
2290 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2291                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2292 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2293 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2294 #endif