net/bridge/br_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  */
   8
   9 #ifndef _BR_PRIVATE_H
  10 #define _BR_PRIVATE_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/if_bridge.h>
  14 #include <linux/netpoll.h>
  15 #include <linux/u64_stats_sync.h>
  16 #include <net/route.h>
  17 #include <net/ip6_fib.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/rhashtable.h>
  20 #include <linux/refcount.h>
  21
  22 #define BR_HASH_BITS 8
  23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25 #define BR_HOLD_TIME (1*HZ)
  26
  27 #define BR_PORT_BITS    10
  28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  29
  30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  31 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
  32 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
  33
  34 #define BR_HWDOM_MAX BITS_PER_LONG
  35
  36 #define BR_VERSION      "2.3"
  37
  38 /* Control of forwarding link local multicast */
  39 #define BR_GROUPFWD_DEFAULT     0
  40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  41 enum {
  42         BR_GROUPFWD_STP         = BIT(0),
  43         BR_GROUPFWD_MACPAUSE    = BIT(1),
  44         BR_GROUPFWD_LACP        = BIT(2),
  45 };
  46
  47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  48                                 BR_GROUPFWD_LACP)
  49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  50 #define BR_GROUPFWD_8021AD      0xB801u
  51
  52 /* Path to usermode spanning tree program */
  53 #define BR_STP_PROG     "/sbin/bridge-stp"
  54
  55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  56
  57 typedef struct bridge_id bridge_id;
  58 typedef struct mac_addr mac_addr;
  59 typedef __u16 port_id;
  60
  61 struct bridge_id {
  62         unsigned char   prio[2];
  63         unsigned char   addr[ETH_ALEN];
  64 };
  65
  66 struct mac_addr {
  67         unsigned char   addr[ETH_ALEN];
  68 };
  69
  70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  71 /* our own querier */
  72 struct bridge_mcast_own_query {
  73         struct timer_list       timer;
  74         u32                     startup_sent;
  75 };
  76
  77 /* other querier */
  78 struct bridge_mcast_other_query {
  79         struct timer_list               timer;
  80         unsigned long                   delay_time;
  81 };
  82
  83 /* selected querier */
  84 struct bridge_mcast_querier {
  85         struct br_ip addr;
  86         int port_ifidx;
  87         seqcount_spinlock_t seq;
  88 };
  89
  90 /* IGMP/MLD statistics */
  91 struct bridge_mcast_stats {
  92         struct br_mcast_stats mstats;
  93         struct u64_stats_sync syncp;
  94 };
  95
  96 struct br_mdb_src_entry {
  97         struct br_ip                    addr;
  98 };
  99
 100 struct br_mdb_config {
 101         struct net_bridge               *br;
 102         struct net_bridge_port          *p;
 103         struct br_mdb_entry             *entry;
 104         struct br_ip                    group;
 105         bool                            src_entry;
 106         u8                              filter_mode;
 107         u16                             nlflags;
 108         struct br_mdb_src_entry         *src_entries;
 109         int                             num_src_entries;
 110         u8                              rt_protocol;
 111 };
 112 #endif
 113
 114 /* net_bridge_mcast_port must be always defined due to forwarding stubs */
 115 struct net_bridge_mcast_port {
 116 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 117         struct net_bridge_port          *port;
 118         struct net_bridge_vlan          *vlan;
 119
 120         struct bridge_mcast_own_query   ip4_own_query;
 121         struct timer_list               ip4_mc_router_timer;
 122         struct hlist_node               ip4_rlist;
 123 #if IS_ENABLED(CONFIG_IPV6)
 124         struct bridge_mcast_own_query   ip6_own_query;
 125         struct timer_list               ip6_mc_router_timer;
 126         struct hlist_node               ip6_rlist;
 127 #endif /* IS_ENABLED(CONFIG_IPV6) */
 128         unsigned char                   multicast_router;
 129         u32                             mdb_n_entries;
 130         u32                             mdb_max_entries;
 131 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 132 };
 133
 134 /* net_bridge_mcast must be always defined due to forwarding stubs */
 135 struct net_bridge_mcast {
 136 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 137         struct net_bridge               *br;
 138         struct net_bridge_vlan          *vlan;
 139
 140         u32                             multicast_last_member_count;
 141         u32                             multicast_startup_query_count;
 142
 143         u8                              multicast_querier;
 144         u8                              multicast_igmp_version;
 145         u8                              multicast_router;
 146 #if IS_ENABLED(CONFIG_IPV6)
 147         u8                              multicast_mld_version;
 148 #endif
 149         unsigned long                   multicast_last_member_interval;
 150         unsigned long                   multicast_membership_interval;
 151         unsigned long                   multicast_querier_interval;
 152         unsigned long                   multicast_query_interval;
 153         unsigned long                   multicast_query_response_interval;
 154         unsigned long                   multicast_startup_query_interval;
 155         struct hlist_head               ip4_mc_router_list;
 156         struct timer_list               ip4_mc_router_timer;
 157         struct bridge_mcast_other_query ip4_other_query;
 158         struct bridge_mcast_own_query   ip4_own_query;
 159         struct bridge_mcast_querier     ip4_querier;
 160 #if IS_ENABLED(CONFIG_IPV6)
 161         struct hlist_head               ip6_mc_router_list;
 162         struct timer_list               ip6_mc_router_timer;
 163         struct bridge_mcast_other_query ip6_other_query;
 164         struct bridge_mcast_own_query   ip6_own_query;
 165         struct bridge_mcast_querier     ip6_querier;
 166 #endif /* IS_ENABLED(CONFIG_IPV6) */
 167 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 168 };
 169
 170 struct br_tunnel_info {
 171         __be64                          tunnel_id;
 172         struct metadata_dst __rcu       *tunnel_dst;
 173 };
 174
 175 /* private vlan flags */
 176 enum {
 177         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 178         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 179         BR_VLFLAG_MCAST_ENABLED = BIT(2),
 180         BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
 181         BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
 182 };
 183
 184 /**
 185  * struct net_bridge_vlan - per-vlan entry
 186  *
 187  * @vnode: rhashtable member
 188  * @vid: VLAN id
 189  * @flags: bridge vlan flags
 190  * @priv_flags: private (in-kernel) bridge vlan flags
 191  * @state: STP state (e.g. blocking, learning, forwarding)
 192  * @stats: per-cpu VLAN statistics
 193  * @br: if MASTER flag set, this points to a bridge struct
 194  * @port: if MASTER flag unset, this points to a port struct
 195  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 196  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 197  *          for this VLAN entry
 198  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
 199  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
 200  *                  context
 201  * @msti: if MASTER flag set, this holds the VLANs MST instance
 202  * @vlist: sorted list of VLAN entries
 203  * @rcu: used for entry destruction
 204  *
 205  * This structure is shared between the global per-VLAN entries contained in
 206  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 207  * the port's rhashtable. The union entries should be interpreted depending on
 208  * the entry flags that are set.
 209  */
 210 struct net_bridge_vlan {
 211         struct rhash_head               vnode;
 212         struct rhash_head               tnode;
 213         u16                             vid;
 214         u16                             flags;
 215         u16                             priv_flags;
 216         u8                              state;
 217         struct pcpu_sw_netstats __percpu *stats;
 218         union {
 219                 struct net_bridge       *br;
 220                 struct net_bridge_port  *port;
 221         };
 222         union {
 223                 refcount_t              refcnt;
 224                 struct net_bridge_vlan  *brvlan;
 225         };
 226
 227         struct br_tunnel_info           tinfo;
 228
 229         union {
 230                 struct net_bridge_mcast         br_mcast_ctx;
 231                 struct net_bridge_mcast_port    port_mcast_ctx;
 232         };
 233
 234         u16                             msti;
 235
 236         struct list_head                vlist;
 237
 238         struct rcu_head                 rcu;
 239 };
 240
 241 /**
 242  * struct net_bridge_vlan_group
 243  *
 244  * @vlan_hash: VLAN entry rhashtable
 245  * @vlan_list: sorted VLAN entry list
 246  * @num_vlans: number of total VLAN entries
 247  * @pvid: PVID VLAN id
 248  * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 249  *
 250  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 251  *            primitives because the bridge can have entries in its list which
 252  *            are just for global context but not for filtering, i.e. they have
 253  *            the master flag set but not the brentry flag. If you have to check
 254  *            if there're "real" entries in the bridge please test @num_vlans
 255  */
 256 struct net_bridge_vlan_group {
 257         struct rhashtable               vlan_hash;
 258         struct rhashtable               tunnel_hash;
 259         struct list_head                vlan_list;
 260         u16                             num_vlans;
 261         u16                             pvid;
 262         u8                              pvid_state;
 263 };
 264
 265 /* bridge fdb flags */
 266 enum {
 267         BR_FDB_LOCAL,
 268         BR_FDB_STATIC,
 269         BR_FDB_STICKY,
 270         BR_FDB_ADDED_BY_USER,
 271         BR_FDB_ADDED_BY_EXT_LEARN,
 272         BR_FDB_OFFLOADED,
 273         BR_FDB_NOTIFY,
 274         BR_FDB_NOTIFY_INACTIVE,
 275         BR_FDB_LOCKED,
 276 };
 277
 278 struct net_bridge_fdb_key {
 279         mac_addr addr;
 280         u16 vlan_id;
 281 };
 282
 283 struct net_bridge_fdb_entry {
 284         struct rhash_head               rhnode;
 285         struct net_bridge_port          *dst;
 286
 287         struct net_bridge_fdb_key       key;
 288         struct hlist_node               fdb_node;
 289         unsigned long                   flags;
 290
 291         /* write-heavy members should not affect lookups */
 292         unsigned long                   updated ____cacheline_aligned_in_smp;
 293         unsigned long                   used;
 294
 295         struct rcu_head                 rcu;
 296 };
 297
 298 struct net_bridge_fdb_flush_desc {
 299         unsigned long                   flags;
 300         unsigned long                   flags_mask;
 301         int                             port_ifindex;
 302         u16                             vlan_id;
 303 };
 304
 305 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 306 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 307 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 308 #define MDB_PG_FLAGS_STAR_EXCL  BIT(3)
 309 #define MDB_PG_FLAGS_BLOCKED    BIT(4)
 310
 311 #define PG_SRC_ENT_LIMIT        32
 312
 313 #define BR_SGRP_F_DELETE        BIT(0)
 314 #define BR_SGRP_F_SEND          BIT(1)
 315 #define BR_SGRP_F_INSTALLED     BIT(2)
 316 #define BR_SGRP_F_USER_ADDED    BIT(3)
 317
 318 struct net_bridge_mcast_gc {
 319         struct hlist_node               gc_node;
 320         void                            (*destroy)(struct net_bridge_mcast_gc *gc);
 321 };
 322
 323 struct net_bridge_group_src {
 324         struct hlist_node               node;
 325
 326         struct br_ip                    addr;
 327         struct net_bridge_port_group    *pg;
 328         u8                              flags;
 329         u8                              src_query_rexmit_cnt;
 330         struct timer_list               timer;
 331
 332         struct net_bridge               *br;
 333         struct net_bridge_mcast_gc      mcast_gc;
 334         struct rcu_head                 rcu;
 335 };
 336
 337 struct net_bridge_port_group_sg_key {
 338         struct net_bridge_port          *port;
 339         struct br_ip                    addr;
 340 };
 341
 342 struct net_bridge_port_group {
 343         struct net_bridge_port_group __rcu *next;
 344         struct net_bridge_port_group_sg_key key;
 345         unsigned char                   eth_addr[ETH_ALEN] __aligned(2);
 346         unsigned char                   flags;
 347         unsigned char                   filter_mode;
 348         unsigned char                   grp_query_rexmit_cnt;
 349         unsigned char                   rt_protocol;
 350
 351         struct hlist_head               src_list;
 352         unsigned int                    src_ents;
 353         struct timer_list               timer;
 354         struct timer_list               rexmit_timer;
 355         struct hlist_node               mglist;
 356         struct rb_root                  eht_set_tree;
 357         struct rb_root                  eht_host_tree;
 358
 359         struct rhash_head               rhnode;
 360         struct net_bridge_mcast_gc      mcast_gc;
 361         struct rcu_head                 rcu;
 362 };
 363
 364 struct net_bridge_mdb_entry {
 365         struct rhash_head               rhnode;
 366         struct net_bridge               *br;
 367         struct net_bridge_port_group __rcu *ports;
 368         struct br_ip                    addr;
 369         bool                            host_joined;
 370
 371         struct timer_list               timer;
 372         struct hlist_node               mdb_node;
 373
 374         struct net_bridge_mcast_gc      mcast_gc;
 375         struct rcu_head                 rcu;
 376 };
 377
 378 struct net_bridge_port {
 379         struct net_bridge               *br;
 380         struct net_device               *dev;
 381         netdevice_tracker               dev_tracker;
 382         struct list_head                list;
 383
 384         unsigned long                   flags;
 385 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 386         struct net_bridge_vlan_group    __rcu *vlgrp;
 387 #endif
 388         struct net_bridge_port          __rcu *backup_port;
 389
 390         /* STP */
 391         u8                              priority;
 392         u8                              state;
 393         u16                             port_no;
 394         unsigned char                   topology_change_ack;
 395         unsigned char                   config_pending;
 396         port_id                         port_id;
 397         port_id                         designated_port;
 398         bridge_id                       designated_root;
 399         bridge_id                       designated_bridge;
 400         u32                             path_cost;
 401         u32                             designated_cost;
 402         unsigned long                   designated_age;
 403
 404         struct timer_list               forward_delay_timer;
 405         struct timer_list               hold_timer;
 406         struct timer_list               message_age_timer;
 407         struct kobject                  kobj;
 408         struct rcu_head                 rcu;
 409
 410         struct net_bridge_mcast_port    multicast_ctx;
 411
 412 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 413         struct bridge_mcast_stats       __percpu *mcast_stats;
 414
 415         u32                             multicast_eht_hosts_limit;
 416         u32                             multicast_eht_hosts_cnt;
 417         struct hlist_head               mglist;
 418 #endif
 419
 420 #ifdef CONFIG_SYSFS
 421         char                            sysfs_name[IFNAMSIZ];
 422 #endif
 423
 424 #ifdef CONFIG_NET_POLL_CONTROLLER
 425         struct netpoll                  *np;
 426 #endif
 427 #ifdef CONFIG_NET_SWITCHDEV
 428         /* Identifier used to group ports that share the same switchdev
 429          * hardware domain.
 430          */
 431         int                             hwdom;
 432         int                             offload_count;
 433         struct netdev_phys_item_id      ppid;
 434 #endif
 435         u16                             group_fwd_mask;
 436         u16                             backup_redirected_cnt;
 437
 438         struct bridge_stp_xstats        stp_xstats;
 439 };
 440
 441 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 442
 443 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 444 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 445
 446 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 447 {
 448         return rcu_dereference(dev->rx_handler_data);
 449 }
 450
 451 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 452 {
 453         return netif_is_bridge_port(dev) ?
 454                 rtnl_dereference(dev->rx_handler_data) : NULL;
 455 }
 456
 457 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 458 {
 459         return netif_is_bridge_port(dev) ?
 460                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 461 }
 462
 463 enum net_bridge_opts {
 464         BROPT_VLAN_ENABLED,
 465         BROPT_VLAN_STATS_ENABLED,
 466         BROPT_NF_CALL_IPTABLES,
 467         BROPT_NF_CALL_IP6TABLES,
 468         BROPT_NF_CALL_ARPTABLES,
 469         BROPT_GROUP_ADDR_SET,
 470         BROPT_MULTICAST_ENABLED,
 471         BROPT_MULTICAST_QUERY_USE_IFADDR,
 472         BROPT_MULTICAST_STATS_ENABLED,
 473         BROPT_HAS_IPV6_ADDR,
 474         BROPT_NEIGH_SUPPRESS_ENABLED,
 475         BROPT_MTU_SET_BY_USER,
 476         BROPT_VLAN_STATS_PER_PORT,
 477         BROPT_NO_LL_LEARN,
 478         BROPT_VLAN_BRIDGE_BINDING,
 479         BROPT_MCAST_VLAN_SNOOPING_ENABLED,
 480         BROPT_MST_ENABLED,
 481 };
 482
 483 struct net_bridge {
 484         spinlock_t                      lock;
 485         spinlock_t                      hash_lock;
 486         struct hlist_head               frame_type_list;
 487         struct net_device               *dev;
 488         unsigned long                   options;
 489         /* These fields are accessed on each packet */
 490 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 491         __be16                          vlan_proto;
 492         u16                             default_pvid;
 493         struct net_bridge_vlan_group    __rcu *vlgrp;
 494 #endif
 495
 496         struct rhashtable               fdb_hash_tbl;
 497         struct list_head                port_list;
 498 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 499         union {
 500                 struct rtable           fake_rtable;
 501                 struct rt6_info         fake_rt6_info;
 502         };
 503 #endif
 504         u16                             group_fwd_mask;
 505         u16                             group_fwd_mask_required;
 506
 507         /* STP */
 508         bridge_id                       designated_root;
 509         bridge_id                       bridge_id;
 510         unsigned char                   topology_change;
 511         unsigned char                   topology_change_detected;
 512         u16                             root_port;
 513         unsigned long                   max_age;
 514         unsigned long                   hello_time;
 515         unsigned long                   forward_delay;
 516         unsigned long                   ageing_time;
 517         unsigned long                   bridge_max_age;
 518         unsigned long                   bridge_hello_time;
 519         unsigned long                   bridge_forward_delay;
 520         unsigned long                   bridge_ageing_time;
 521         u32                             root_path_cost;
 522
 523         u8                              group_addr[ETH_ALEN];
 524
 525         enum {
 526                 BR_NO_STP,              /* no spanning tree */
 527                 BR_KERNEL_STP,          /* old STP in kernel */
 528                 BR_USER_STP,            /* new RSTP in userspace */
 529         } stp_enabled;
 530
 531         struct net_bridge_mcast         multicast_ctx;
 532
 533 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 534         struct bridge_mcast_stats       __percpu *mcast_stats;
 535
 536         u32                             hash_max;
 537
 538         spinlock_t                      multicast_lock;
 539
 540         struct rhashtable               mdb_hash_tbl;
 541         struct rhashtable               sg_port_tbl;
 542
 543         struct hlist_head               mcast_gc_list;
 544         struct hlist_head               mdb_list;
 545
 546         struct work_struct              mcast_gc_work;
 547 #endif
 548
 549         struct timer_list               hello_timer;
 550         struct timer_list               tcn_timer;
 551         struct timer_list               topology_change_timer;
 552         struct delayed_work             gc_work;
 553         struct kobject                  *ifobj;
 554         u32                             auto_cnt;
 555
 556 #ifdef CONFIG_NET_SWITCHDEV
 557         /* Counter used to make sure that hardware domains get unique
 558          * identifiers in case a bridge spans multiple switchdev instances.
 559          */
 560         int                             last_hwdom;
 561         /* Bit mask of hardware domain numbers in use */
 562         unsigned long                   busy_hwdoms;
 563 #endif
 564         struct hlist_head               fdb_list;
 565
 566 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
 567         struct hlist_head               mrp_list;
 568 #endif
 569 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
 570         struct hlist_head               mep_list;
 571 #endif
 572 };
 573
 574 struct br_input_skb_cb {
 575         struct net_device *brdev;
 576
 577         u16 frag_max_size;
 578 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 579         u8 igmp;
 580         u8 mrouters_only:1;
 581 #endif
 582         u8 proxyarp_replied:1;
 583         u8 src_port_isolated:1;
 584 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 585         u8 vlan_filtered:1;
 586 #endif
 587 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 588         u8 br_netfilter_broute:1;
 589 #endif
 590
 591 #ifdef CONFIG_NET_SWITCHDEV
 592         /* Set if TX data plane offloading is used towards at least one
 593          * hardware domain.
 594          */
 595         u8 tx_fwd_offload:1;
 596         /* The switchdev hardware domain from which this packet was received.
 597          * If skb->offload_fwd_mark was set, then this packet was already
 598          * forwarded by hardware to the other ports in the source hardware
 599          * domain, otherwise it wasn't.
 600          */
 601         int src_hwdom;
 602         /* Bit mask of hardware domains towards this packet has already been
 603          * transmitted using the TX data plane offload.
 604          */
 605         unsigned long fwd_hwdoms;
 606 #endif
 607 };
 608
 609 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 610
 611 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 612 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 613 #else
 614 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 615 #endif
 616
 617 #define br_printk(level, br, format, args...)   \
 618         printk(level "%s: " format, (br)->dev->name, ##args)
 619
 620 #define br_err(__br, format, args...)                   \
 621         br_printk(KERN_ERR, __br, format, ##args)
 622 #define br_warn(__br, format, args...)                  \
 623         br_printk(KERN_WARNING, __br, format, ##args)
 624 #define br_notice(__br, format, args...)                \
 625         br_printk(KERN_NOTICE, __br, format, ##args)
 626 #define br_info(__br, format, args...)                  \
 627         br_printk(KERN_INFO, __br, format, ##args)
 628
 629 #define br_debug(br, format, args...)                   \
 630         pr_debug("%s: " format,  (br)->dev->name, ##args)
 631
 632 /* called under bridge lock */
 633 static inline int br_is_root_bridge(const struct net_bridge *br)
 634 {
 635         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 636 }
 637
 638 /* check if a VLAN entry is global */
 639 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 640 {
 641         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 642 }
 643
 644 /* check if a VLAN entry is used by the bridge */
 645 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 646 {
 647         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 648 }
 649
 650 /* check if we should use the vlan entry, returns false if it's only context */
 651 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 652 {
 653         if (br_vlan_is_master(v)) {
 654                 if (br_vlan_is_brentry(v))
 655                         return true;
 656                 else
 657                         return false;
 658         }
 659
 660         return true;
 661 }
 662
 663 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 664 {
 665         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 666 }
 667
 668 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 669 {
 670         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 671
 672         if (!ret)
 673                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 674
 675         return ret;
 676 }
 677
 678 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 679                                        const struct bridge_vlan_info *last,
 680                                        struct netlink_ext_ack *extack)
 681 {
 682         /* pvid flag is not allowed in ranges */
 683         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 684                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 685                 return false;
 686         }
 687
 688         /* when cur is the range end, check if:
 689          *  - it has range start flag
 690          *  - range ids are invalid (end is equal to or before start)
 691          */
 692         if (last) {
 693                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 694                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 695                         return false;
 696                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 697                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 698                         return false;
 699                 } else if (cur->vid <= last->vid) {
 700                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 701                         return false;
 702                 }
 703         }
 704
 705         /* check for required range flags */
 706         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 707                             BRIDGE_VLAN_INFO_RANGE_END))) {
 708                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 709                 return false;
 710         }
 711
 712         return true;
 713 }
 714
 715 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 716 {
 717         u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 718
 719 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 720         if (!br_vlan_is_master(v))
 721                 mcast_router = v->port_mcast_ctx.multicast_router;
 722         else
 723                 mcast_router = v->br_mcast_ctx.multicast_router;
 724 #endif
 725
 726         return mcast_router;
 727 }
 728
 729 static inline int br_afspec_cmd_to_rtm(int cmd)
 730 {
 731         switch (cmd) {
 732         case RTM_SETLINK:
 733                 return RTM_NEWVLAN;
 734         case RTM_DELLINK:
 735                 return RTM_DELVLAN;
 736         }
 737
 738         return 0;
 739 }
 740
 741 static inline int br_opt_get(const struct net_bridge *br,
 742                              enum net_bridge_opts opt)
 743 {
 744         return test_bit(opt, &br->options);
 745 }
 746
 747 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 748                       struct netlink_ext_ack *extack);
 749 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 750 int br_boolopt_multi_toggle(struct net_bridge *br,
 751                             struct br_boolopt_multi *bm,
 752                             struct netlink_ext_ack *extack);
 753 void br_boolopt_multi_get(const struct net_bridge *br,
 754                           struct br_boolopt_multi *bm);
 755 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 756
 757 /* br_device.c */
 758 void br_dev_setup(struct net_device *dev);
 759 void br_dev_delete(struct net_device *dev, struct list_head *list);
 760 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 761 #ifdef CONFIG_NET_POLL_CONTROLLER
 762 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 763                                        struct sk_buff *skb)
 764 {
 765         netpoll_send_skb(p->np, skb);
 766 }
 767
 768 int br_netpoll_enable(struct net_bridge_port *p);
 769 void br_netpoll_disable(struct net_bridge_port *p);
 770 #else
 771 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 772                                        struct sk_buff *skb)
 773 {
 774 }
 775
 776 static inline int br_netpoll_enable(struct net_bridge_port *p)
 777 {
 778         return 0;
 779 }
 780
 781 static inline void br_netpoll_disable(struct net_bridge_port *p)
 782 {
 783 }
 784 #endif
 785
 786 /* br_fdb.c */
 787 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 788 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 789 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 790                                      NTF_STICKY | NTF_OFFLOADED)
 791
 792 int br_fdb_init(void);
 793 void br_fdb_fini(void);
 794 int br_fdb_hash_init(struct net_bridge *br);
 795 void br_fdb_hash_fini(struct net_bridge *br);
 796 void br_fdb_flush(struct net_bridge *br,
 797                   const struct net_bridge_fdb_flush_desc *desc);
 798 void br_fdb_find_delete_local(struct net_bridge *br,
 799                               const struct net_bridge_port *p,
 800                               const unsigned char *addr, u16 vid);
 801 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 802 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 803 void br_fdb_cleanup(struct work_struct *work);
 804 void br_fdb_delete_by_port(struct net_bridge *br,
 805                            const struct net_bridge_port *p, u16 vid, int do_all);
 806 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 807                                              const unsigned char *addr,
 808                                              __u16 vid);
 809 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 810 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 811                    unsigned long off);
 812 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 813                      const unsigned char *addr, u16 vid);
 814 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 815                    const unsigned char *addr, u16 vid, unsigned long flags);
 816
 817 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 818                   struct net_device *dev, const unsigned char *addr, u16 vid,
 819                   struct netlink_ext_ack *extack);
 820 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
 821                        struct net_device *dev, u16 vid,
 822                        struct netlink_ext_ack *extack);
 823 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 824                const unsigned char *addr, u16 vid, u16 nlh_flags,
 825                struct netlink_ext_ack *extack);
 826 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 827                 struct net_device *dev, struct net_device *fdev, int *idx);
 828 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 829                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 830                struct netlink_ext_ack *extack);
 831 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 832 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 833 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 834                               const unsigned char *addr, u16 vid,
 835                               bool locked, bool swdev_notify);
 836 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 837                               const unsigned char *addr, u16 vid,
 838                               bool swdev_notify);
 839 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 840                           const unsigned char *addr, u16 vid, bool offloaded);
 841
 842 /* br_forward.c */
 843 enum br_pkt_type {
 844         BR_PKT_UNICAST,
 845         BR_PKT_MULTICAST,
 846         BR_PKT_BROADCAST
 847 };
 848 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 849 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 850                 bool local_rcv, bool local_orig);
 851 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 852 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 853               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
 854               u16 vid);
 855
 856 /* return true if both source port and dest port are isolated */
 857 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 858                                    const struct sk_buff *skb)
 859 {
 860         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 861                (to->flags & BR_ISOLATED);
 862 }
 863
 864 /* br_if.c */
 865 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 866 int br_add_bridge(struct net *net, const char *name);
 867 int br_del_bridge(struct net *net, const char *name);
 868 int br_add_if(struct net_bridge *br, struct net_device *dev,
 869               struct netlink_ext_ack *extack);
 870 int br_del_if(struct net_bridge *br, struct net_device *dev);
 871 void br_mtu_auto_adjust(struct net_bridge *br);
 872 netdev_features_t br_features_recompute(struct net_bridge *br,
 873                                         netdev_features_t features);
 874 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 875 void br_manage_promisc(struct net_bridge *br);
 876 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 877
 878 /* br_input.c */
 879 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 880 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 881
 882 struct br_frame_type {
 883         __be16                  type;
 884         int                     (*frame_handler)(struct net_bridge_port *port,
 885                                                  struct sk_buff *skb);
 886         struct hlist_node       list;
 887 };
 888
 889 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 890 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 891
 892 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 893 {
 894         return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 895 }
 896
 897 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 898 {
 899         return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 900 }
 901
 902 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 903 {
 904         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 905 }
 906
 907 static inline struct net_bridge_port *
 908 br_port_get_check_rtnl(const struct net_device *dev)
 909 {
 910         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 911 }
 912
 913 /* br_ioctl.c */
 914 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 915                           void __user *data, int cmd);
 916 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 917                   struct ifreq *ifr, void __user *uarg);
 918
 919 /* br_multicast.c */
 920 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 921 int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 922                      struct net_bridge_mcast_port **pmctx,
 923                      struct net_bridge_vlan *vlan,
 924                      struct sk_buff *skb, u16 vid);
 925 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
 926                                         struct sk_buff *skb, u16 vid);
 927 int br_multicast_add_port(struct net_bridge_port *port);
 928 void br_multicast_del_port(struct net_bridge_port *port);
 929 void br_multicast_enable_port(struct net_bridge_port *port);
 930 void br_multicast_disable_port(struct net_bridge_port *port);
 931 void br_multicast_init(struct net_bridge *br);
 932 void br_multicast_join_snoopers(struct net_bridge *br);
 933 void br_multicast_leave_snoopers(struct net_bridge *br);
 934 void br_multicast_open(struct net_bridge *br);
 935 void br_multicast_stop(struct net_bridge *br);
 936 void br_multicast_dev_del(struct net_bridge *br);
 937 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 938                         struct net_bridge_mcast *brmctx,
 939                         bool local_rcv, bool local_orig);
 940 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 941 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 942                                  unsigned long val);
 943 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 944 int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 945                         struct netlink_ext_ack *extack);
 946 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 947 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 948 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 949                                   unsigned long val);
 950 #if IS_ENABLED(CONFIG_IPV6)
 951 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 952                                  unsigned long val);
 953 #endif
 954 struct net_bridge_mdb_entry *
 955 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 956 struct net_bridge_mdb_entry *
 957 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 958 struct net_bridge_port_group *
 959 br_multicast_new_port_group(struct net_bridge_port *port,
 960                             const struct br_ip *group,
 961                             struct net_bridge_port_group __rcu *next,
 962                             unsigned char flags, const unsigned char *src,
 963                             u8 filter_mode, u8 rt_protocol,
 964                             struct netlink_ext_ack *extack);
 965 void br_multicast_del_port_group(struct net_bridge_port_group *p);
 966 int br_mdb_hash_init(struct net_bridge *br);
 967 void br_mdb_hash_fini(struct net_bridge *br);
 968 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 969                    struct net_bridge_port_group *pg, int type);
 970 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
 971                    int type);
 972 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 973                          struct net_bridge_port_group *pg,
 974                          struct net_bridge_port_group __rcu **pp);
 975 void br_multicast_count(struct net_bridge *br,
 976                         const struct net_bridge_port *p,
 977                         const struct sk_buff *skb, u8 type, u8 dir);
 978 int br_multicast_init_stats(struct net_bridge *br);
 979 void br_multicast_uninit_stats(struct net_bridge *br);
 980 void br_multicast_get_stats(const struct net_bridge *br,
 981                             const struct net_bridge_port *p,
 982                             struct br_mcast_stats *dest);
 983 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
 984 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
 985 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
 986 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
 987                struct netlink_ext_ack *extack);
 988 int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
 989                struct netlink_ext_ack *extack);
 990 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
 991                 struct netlink_callback *cb);
 992 void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
 993                             struct net_bridge_mdb_entry *mp, bool notify);
 994 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 995 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 996                                      u8 filter_mode);
 997 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 998                                        struct net_bridge_port_group *sg);
 999 struct net_bridge_group_src *
1000 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1001 struct net_bridge_group_src *
1002 br_multicast_new_group_src(struct net_bridge_port_group *pg,
1003                            struct br_ip *src_ip);
1004 void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1005 void br_multicast_del_group_src(struct net_bridge_group_src *src,
1006                                 bool fastleave);
1007 void br_multicast_ctx_init(struct net_bridge *br,
1008                            struct net_bridge_vlan *vlan,
1009                            struct net_bridge_mcast *brmctx);
1010 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1011 void br_multicast_port_ctx_init(struct net_bridge_port *port,
1012                                 struct net_bridge_vlan *vlan,
1013                                 struct net_bridge_mcast_port *pmctx);
1014 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1015 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1016 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1017                                       struct netlink_ext_ack *extack);
1018 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1019
1020 int br_rports_fill_info(struct sk_buff *skb,
1021                         const struct net_bridge_mcast *brmctx);
1022 int br_multicast_dump_querier_state(struct sk_buff *skb,
1023                                     const struct net_bridge_mcast *brmctx,
1024                                     int nest_attr);
1025 size_t br_multicast_querier_state_size(void);
1026 size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1027 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1028                                   unsigned long val);
1029 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1030                                           unsigned long val);
1031
1032 static inline bool br_group_is_l2(const struct br_ip *group)
1033 {
1034         return group->proto == 0;
1035 }
1036
1037 #define mlock_dereference(X, br) \
1038         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1039
1040 static inline struct hlist_node *
1041 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1042                                   struct sk_buff *skb)
1043 {
1044 #if IS_ENABLED(CONFIG_IPV6)
1045         if (skb->protocol == htons(ETH_P_IPV6))
1046                 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1047 #endif
1048         return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1049 }
1050
1051 static inline struct net_bridge_port *
1052 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1053 {
1054         struct net_bridge_mcast_port *mctx;
1055
1056 #if IS_ENABLED(CONFIG_IPV6)
1057         if (skb->protocol == htons(ETH_P_IPV6))
1058                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1059                                         ip6_rlist);
1060         else
1061 #endif
1062                 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1063                                         ip4_rlist);
1064
1065         if (mctx)
1066                 return mctx->port;
1067         else
1068                 return NULL;
1069 }
1070
1071 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1072 {
1073         return timer_pending(&brmctx->ip4_mc_router_timer);
1074 }
1075
1076 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1077 {
1078 #if IS_ENABLED(CONFIG_IPV6)
1079         return timer_pending(&brmctx->ip6_mc_router_timer);
1080 #else
1081         return false;
1082 #endif
1083 }
1084
1085 static inline bool
1086 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1087 {
1088         switch (brmctx->multicast_router) {
1089         case MDB_RTR_TYPE_PERM:
1090                 return true;
1091         case MDB_RTR_TYPE_TEMP_QUERY:
1092                 if (skb) {
1093                         if (skb->protocol == htons(ETH_P_IP))
1094                                 return br_ip4_multicast_is_router(brmctx);
1095                         else if (skb->protocol == htons(ETH_P_IPV6))
1096                                 return br_ip6_multicast_is_router(brmctx);
1097                 } else {
1098                         return br_ip4_multicast_is_router(brmctx) ||
1099                                br_ip6_multicast_is_router(brmctx);
1100                 }
1101                 fallthrough;
1102         default:
1103                 return false;
1104         }
1105 }
1106
1107 static inline bool
1108 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1109                               struct bridge_mcast_other_query *querier,
1110                               const bool is_ipv6)
1111 {
1112         bool own_querier_enabled;
1113
1114         if (brmctx->multicast_querier) {
1115                 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1116                         own_querier_enabled = false;
1117                 else
1118                         own_querier_enabled = true;
1119         } else {
1120                 own_querier_enabled = false;
1121         }
1122
1123         return time_is_before_jiffies(querier->delay_time) &&
1124                (own_querier_enabled || timer_pending(&querier->timer));
1125 }
1126
1127 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1128                                                struct ethhdr *eth,
1129                                                const struct net_bridge_mdb_entry *mdb)
1130 {
1131         switch (eth->h_proto) {
1132         case (htons(ETH_P_IP)):
1133                 return __br_multicast_querier_exists(brmctx,
1134                         &brmctx->ip4_other_query, false);
1135 #if IS_ENABLED(CONFIG_IPV6)
1136         case (htons(ETH_P_IPV6)):
1137                 return __br_multicast_querier_exists(brmctx,
1138                         &brmctx->ip6_other_query, true);
1139 #endif
1140         default:
1141                 return !!mdb && br_group_is_l2(&mdb->addr);
1142         }
1143 }
1144
1145 static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1146 {
1147         switch (ip->proto) {
1148         case htons(ETH_P_IP):
1149                 return ipv4_is_zeronet(ip->src.ip4);
1150 #if IS_ENABLED(CONFIG_IPV6)
1151         case htons(ETH_P_IPV6):
1152                 return ipv6_addr_any(&ip->src.ip6);
1153 #endif
1154         default:
1155                 return false;
1156         }
1157 }
1158
1159 static inline bool
1160 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1161                                 __be16 proto)
1162 {
1163         switch (proto) {
1164         case htons(ETH_P_IP):
1165                 return !!(brmctx->multicast_igmp_version == 3);
1166 #if IS_ENABLED(CONFIG_IPV6)
1167         case htons(ETH_P_IPV6):
1168                 return !!(brmctx->multicast_mld_version == 2);
1169 #endif
1170         default:
1171                 return false;
1172         }
1173 }
1174
1175 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1176 {
1177         return BR_INPUT_SKB_CB(skb)->igmp;
1178 }
1179
1180 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1181 {
1182         return brmctx->multicast_last_member_interval *
1183                brmctx->multicast_last_member_count;
1184 }
1185
1186 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1187 {
1188         return brmctx->multicast_membership_interval;
1189 }
1190
1191 static inline bool
1192 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1193 {
1194         return !!brmctx->vlan;
1195 }
1196
1197 static inline bool
1198 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1199 {
1200         return !!pmctx->vlan;
1201 }
1202
1203 static inline struct net_bridge_mcast *
1204 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1205 {
1206         if (!br_multicast_port_ctx_is_vlan(pmctx))
1207                 return &pmctx->port->br->multicast_ctx;
1208         else
1209                 return &pmctx->vlan->brvlan->br_mcast_ctx;
1210 }
1211
1212 static inline bool
1213 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1214 {
1215         return br_multicast_ctx_is_vlan(brmctx) &&
1216                (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1217                 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1218 }
1219
1220 static inline bool
1221 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1222 {
1223         return br_multicast_ctx_is_vlan(brmctx) &&
1224                !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1225 }
1226
1227 static inline bool
1228 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1229 {
1230         return br_multicast_port_ctx_is_vlan(pmctx) &&
1231                !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1232 }
1233
1234 static inline bool
1235 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1236 {
1237         return pmctx->port->state == BR_STATE_DISABLED ||
1238                (br_multicast_port_ctx_is_vlan(pmctx) &&
1239                 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1240                  pmctx->vlan->state == BR_STATE_DISABLED));
1241 }
1242
1243 static inline bool
1244 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1245 {
1246         return br_multicast_port_ctx_state_disabled(pmctx) ||
1247                pmctx->port->state == BR_STATE_BLOCKING ||
1248                (br_multicast_port_ctx_is_vlan(pmctx) &&
1249                 pmctx->vlan->state == BR_STATE_BLOCKING);
1250 }
1251
1252 static inline bool
1253 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1254 {
1255 #if IS_ENABLED(CONFIG_IPV6)
1256         return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1257                !hlist_empty(&brmctx->ip6_mc_router_list);
1258 #else
1259         return !hlist_empty(&brmctx->ip4_mc_router_list);
1260 #endif
1261 }
1262
1263 static inline bool
1264 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1265                                const struct net_bridge_mcast *brmctx2)
1266 {
1267         return brmctx1->multicast_igmp_version ==
1268                brmctx2->multicast_igmp_version &&
1269                brmctx1->multicast_last_member_count ==
1270                brmctx2->multicast_last_member_count &&
1271                brmctx1->multicast_startup_query_count ==
1272                brmctx2->multicast_startup_query_count &&
1273                brmctx1->multicast_last_member_interval ==
1274                brmctx2->multicast_last_member_interval &&
1275                brmctx1->multicast_membership_interval ==
1276                brmctx2->multicast_membership_interval &&
1277                brmctx1->multicast_querier_interval ==
1278                brmctx2->multicast_querier_interval &&
1279                brmctx1->multicast_query_interval ==
1280                brmctx2->multicast_query_interval &&
1281                brmctx1->multicast_query_response_interval ==
1282                brmctx2->multicast_query_response_interval &&
1283                brmctx1->multicast_startup_query_interval ==
1284                brmctx2->multicast_startup_query_interval &&
1285                brmctx1->multicast_querier == brmctx2->multicast_querier &&
1286                brmctx1->multicast_router == brmctx2->multicast_router &&
1287                !br_rports_have_mc_router(brmctx1) &&
1288                !br_rports_have_mc_router(brmctx2) &&
1289 #if IS_ENABLED(CONFIG_IPV6)
1290                brmctx1->multicast_mld_version ==
1291                brmctx2->multicast_mld_version &&
1292 #endif
1293                true;
1294 }
1295
1296 static inline bool
1297 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1298 {
1299         bool vlan_snooping_enabled;
1300
1301         vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1302                                              BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1303
1304         return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1305 }
1306 #else
1307 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1308                                    struct net_bridge_mcast_port **pmctx,
1309                                    struct net_bridge_vlan *vlan,
1310                                    struct sk_buff *skb,
1311                                    u16 vid)
1312 {
1313         return 0;
1314 }
1315
1316 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1317                                                       struct sk_buff *skb, u16 vid)
1318 {
1319         return NULL;
1320 }
1321
1322 static inline int br_multicast_add_port(struct net_bridge_port *port)
1323 {
1324         return 0;
1325 }
1326
1327 static inline void br_multicast_del_port(struct net_bridge_port *port)
1328 {
1329 }
1330
1331 static inline void br_multicast_enable_port(struct net_bridge_port *port)
1332 {
1333 }
1334
1335 static inline void br_multicast_disable_port(struct net_bridge_port *port)
1336 {
1337 }
1338
1339 static inline void br_multicast_init(struct net_bridge *br)
1340 {
1341 }
1342
1343 static inline void br_multicast_join_snoopers(struct net_bridge *br)
1344 {
1345 }
1346
1347 static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1348 {
1349 }
1350
1351 static inline void br_multicast_open(struct net_bridge *br)
1352 {
1353 }
1354
1355 static inline void br_multicast_stop(struct net_bridge *br)
1356 {
1357 }
1358
1359 static inline void br_multicast_dev_del(struct net_bridge *br)
1360 {
1361 }
1362
1363 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1364                                       struct sk_buff *skb,
1365                                       struct net_bridge_mcast *brmctx,
1366                                       bool local_rcv, bool local_orig)
1367 {
1368 }
1369
1370 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1371                                           struct sk_buff *skb)
1372 {
1373         return false;
1374 }
1375
1376 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1377                                                struct ethhdr *eth,
1378                                                const struct net_bridge_mdb_entry *mdb)
1379 {
1380         return false;
1381 }
1382
1383 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1384                              u16 nlmsg_flags, struct netlink_ext_ack *extack)
1385 {
1386         return -EOPNOTSUPP;
1387 }
1388
1389 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1390                              struct netlink_ext_ack *extack)
1391 {
1392         return -EOPNOTSUPP;
1393 }
1394
1395 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1396                               struct netlink_callback *cb)
1397 {
1398         return 0;
1399 }
1400
1401 static inline int br_mdb_hash_init(struct net_bridge *br)
1402 {
1403         return 0;
1404 }
1405
1406 static inline void br_mdb_hash_fini(struct net_bridge *br)
1407 {
1408 }
1409
1410 static inline void br_multicast_count(struct net_bridge *br,
1411                                       const struct net_bridge_port *p,
1412                                       const struct sk_buff *skb,
1413                                       u8 type, u8 dir)
1414 {
1415 }
1416
1417 static inline int br_multicast_init_stats(struct net_bridge *br)
1418 {
1419         return 0;
1420 }
1421
1422 static inline void br_multicast_uninit_stats(struct net_bridge *br)
1423 {
1424 }
1425
1426 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1427 {
1428         return 0;
1429 }
1430
1431 static inline void br_multicast_ctx_init(struct net_bridge *br,
1432                                          struct net_bridge_vlan *vlan,
1433                                          struct net_bridge_mcast *brmctx)
1434 {
1435 }
1436
1437 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1438 {
1439 }
1440
1441 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1442                                               struct net_bridge_vlan *vlan,
1443                                               struct net_bridge_mcast_port *pmctx)
1444 {
1445 }
1446
1447 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1448 {
1449 }
1450
1451 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1452                                                 bool on)
1453 {
1454 }
1455
1456 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1457                                                     bool on,
1458                                                     struct netlink_ext_ack *extack)
1459 {
1460         return -EOPNOTSUPP;
1461 }
1462
1463 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1464                                                    bool on)
1465 {
1466         return false;
1467 }
1468
1469 static inline bool
1470 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1471                                const struct net_bridge_mcast *brmctx2)
1472 {
1473         return true;
1474 }
1475 #endif
1476
1477 /* br_vlan.c */
1478 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1479 bool br_allowed_ingress(const struct net_bridge *br,
1480                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1481                         u16 *vid, u8 *state,
1482                         struct net_bridge_vlan **vlan);
1483 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1484                        const struct sk_buff *skb);
1485 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1486 struct sk_buff *br_handle_vlan(struct net_bridge *br,
1487                                const struct net_bridge_port *port,
1488                                struct net_bridge_vlan_group *vg,
1489                                struct sk_buff *skb);
1490 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1491                 bool *changed, struct netlink_ext_ack *extack);
1492 int br_vlan_delete(struct net_bridge *br, u16 vid);
1493 void br_vlan_flush(struct net_bridge *br);
1494 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1495 void br_recalculate_fwd_mask(struct net_bridge *br);
1496 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1497                           struct netlink_ext_ack *extack);
1498 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1499                         struct netlink_ext_ack *extack);
1500 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1501                       struct netlink_ext_ack *extack);
1502 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1503 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1504 int br_vlan_init(struct net_bridge *br);
1505 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1506                              struct netlink_ext_ack *extack);
1507 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1508                                struct netlink_ext_ack *extack);
1509 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1510                  bool *changed, struct netlink_ext_ack *extack);
1511 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1512 void nbp_vlan_flush(struct net_bridge_port *port);
1513 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1514 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1515 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1516                        struct pcpu_sw_netstats *stats);
1517 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1518 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1519                          void *ptr);
1520 void br_vlan_rtnl_init(void);
1521 void br_vlan_rtnl_uninit(void);
1522 void br_vlan_notify(const struct net_bridge *br,
1523                     const struct net_bridge_port *p,
1524                     u16 vid, u16 vid_range,
1525                     int cmd);
1526 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1527                              const struct net_bridge_vlan *range_end);
1528
1529 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1530                                     struct net_device_path_ctx *ctx,
1531                                     struct net_device_path *path);
1532 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1533                                    struct net_bridge_port *dst,
1534                                    struct net_device_path *path);
1535
1536 static inline struct net_bridge_vlan_group *br_vlan_group(
1537                                         const struct net_bridge *br)
1538 {
1539         return rtnl_dereference(br->vlgrp);
1540 }
1541
1542 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1543                                         const struct net_bridge_port *p)
1544 {
1545         return rtnl_dereference(p->vlgrp);
1546 }
1547
1548 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1549                                         const struct net_bridge *br)
1550 {
1551         return rcu_dereference(br->vlgrp);
1552 }
1553
1554 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1555                                         const struct net_bridge_port *p)
1556 {
1557         return rcu_dereference(p->vlgrp);
1558 }
1559
1560 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1561  * skb, the vlan tag will always be present if the frame was tagged.
1562  */
1563 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1564 {
1565         int err = 0;
1566
1567         if (skb_vlan_tag_present(skb)) {
1568                 *vid = skb_vlan_tag_get_id(skb);
1569         } else {
1570                 *vid = 0;
1571                 err = -EINVAL;
1572         }
1573
1574         return err;
1575 }
1576
1577 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1578 {
1579         if (!vg)
1580                 return 0;
1581
1582         smp_rmb();
1583         return vg->pvid;
1584 }
1585
1586 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1587 {
1588         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1589 }
1590 #else
1591 static inline bool br_allowed_ingress(const struct net_bridge *br,
1592                                       struct net_bridge_vlan_group *vg,
1593                                       struct sk_buff *skb,
1594                                       u16 *vid, u8 *state,
1595                                       struct net_bridge_vlan **vlan)
1596
1597 {
1598         *vlan = NULL;
1599         return true;
1600 }
1601
1602 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1603                                      const struct sk_buff *skb)
1604 {
1605         return true;
1606 }
1607
1608 static inline bool br_should_learn(struct net_bridge_port *p,
1609                                    struct sk_buff *skb, u16 *vid)
1610 {
1611         return true;
1612 }
1613
1614 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1615                                              const struct net_bridge_port *port,
1616                                              struct net_bridge_vlan_group *vg,
1617                                              struct sk_buff *skb)
1618 {
1619         return skb;
1620 }
1621
1622 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1623                               bool *changed, struct netlink_ext_ack *extack)
1624 {
1625         *changed = false;
1626         return -EOPNOTSUPP;
1627 }
1628
1629 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1630 {
1631         return -EOPNOTSUPP;
1632 }
1633
1634 static inline void br_vlan_flush(struct net_bridge *br)
1635 {
1636 }
1637
1638 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1639 {
1640 }
1641
1642 static inline int br_vlan_init(struct net_bridge *br)
1643 {
1644         return 0;
1645 }
1646
1647 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1648                                bool *changed, struct netlink_ext_ack *extack)
1649 {
1650         *changed = false;
1651         return -EOPNOTSUPP;
1652 }
1653
1654 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1655 {
1656         return -EOPNOTSUPP;
1657 }
1658
1659 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1660 {
1661 }
1662
1663 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1664                                                    u16 vid)
1665 {
1666         return NULL;
1667 }
1668
1669 static inline int nbp_vlan_init(struct net_bridge_port *port,
1670                                 struct netlink_ext_ack *extack)
1671 {
1672         return 0;
1673 }
1674
1675 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1676 {
1677         return 0;
1678 }
1679
1680 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1681 {
1682         return 0;
1683 }
1684
1685 static inline int br_vlan_filter_toggle(struct net_bridge *br,
1686                                         unsigned long val,
1687                                         struct netlink_ext_ack *extack)
1688 {
1689         return -EOPNOTSUPP;
1690 }
1691
1692 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1693                                          u32 filter_mask)
1694 {
1695         return 0;
1696 }
1697
1698 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1699                                                   struct net_device_path_ctx *ctx,
1700                                                   struct net_device_path *path)
1701 {
1702 }
1703
1704 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1705                                                  struct net_bridge_port *dst,
1706                                                  struct net_device_path *path)
1707 {
1708         return 0;
1709 }
1710
1711 static inline struct net_bridge_vlan_group *br_vlan_group(
1712                                         const struct net_bridge *br)
1713 {
1714         return NULL;
1715 }
1716
1717 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1718                                         const struct net_bridge_port *p)
1719 {
1720         return NULL;
1721 }
1722
1723 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1724                                         const struct net_bridge *br)
1725 {
1726         return NULL;
1727 }
1728
1729 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1730                                         const struct net_bridge_port *p)
1731 {
1732         return NULL;
1733 }
1734
1735 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1736                                      struct pcpu_sw_netstats *stats)
1737 {
1738 }
1739
1740 static inline void br_vlan_port_event(struct net_bridge_port *p,
1741                                       unsigned long event)
1742 {
1743 }
1744
1745 static inline int br_vlan_bridge_event(struct net_device *dev,
1746                                        unsigned long event, void *ptr)
1747 {
1748         return 0;
1749 }
1750
1751 static inline void br_vlan_rtnl_init(void)
1752 {
1753 }
1754
1755 static inline void br_vlan_rtnl_uninit(void)
1756 {
1757 }
1758
1759 static inline void br_vlan_notify(const struct net_bridge *br,
1760                                   const struct net_bridge_port *p,
1761                                   u16 vid, u16 vid_range,
1762                                   int cmd)
1763 {
1764 }
1765
1766 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1767                                            const struct net_bridge_vlan *range_end)
1768 {
1769         return true;
1770 }
1771
1772 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1773 {
1774         return 0;
1775 }
1776
1777 #endif
1778
1779 /* br_vlan_options.c */
1780 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1781 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1782                            const struct net_bridge_vlan *range_end);
1783 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1784                        const struct net_bridge_port *p);
1785 size_t br_vlan_opts_nl_size(void);
1786 int br_vlan_process_options(const struct net_bridge *br,
1787                             const struct net_bridge_port *p,
1788                             struct net_bridge_vlan *range_start,
1789                             struct net_bridge_vlan *range_end,
1790                             struct nlattr **tb,
1791                             struct netlink_ext_ack *extack);
1792 int br_vlan_rtm_process_global_options(struct net_device *dev,
1793                                        const struct nlattr *attr,
1794                                        int cmd,
1795                                        struct netlink_ext_ack *extack);
1796 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1797                                          const struct net_bridge_vlan *r_end);
1798 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1799                               const struct net_bridge_vlan *v_opts);
1800
1801 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1802 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1803 {
1804         return READ_ONCE(v->state);
1805 }
1806
1807 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1808 {
1809         WRITE_ONCE(v->state, state);
1810 }
1811
1812 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1813 {
1814         return READ_ONCE(vg->pvid_state);
1815 }
1816
1817 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1818                                           u8 state)
1819 {
1820         WRITE_ONCE(vg->pvid_state, state);
1821 }
1822
1823 /* learn_allow is true at ingress and false at egress */
1824 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1825 {
1826         switch (state) {
1827         case BR_STATE_LEARNING:
1828                 return learn_allow;
1829         case BR_STATE_FORWARDING:
1830                 return true;
1831         default:
1832                 return false;
1833         }
1834 }
1835 #endif
1836
1837 /* br_mst.c */
1838 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1839 DECLARE_STATIC_KEY_FALSE(br_mst_used);
1840 static inline bool br_mst_is_enabled(struct net_bridge *br)
1841 {
1842         return static_branch_unlikely(&br_mst_used) &&
1843                 br_opt_get(br, BROPT_MST_ENABLED);
1844 }
1845
1846 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1847                      struct netlink_ext_ack *extack);
1848 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1849 void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1850 int br_mst_set_enabled(struct net_bridge *br, bool on,
1851                        struct netlink_ext_ack *extack);
1852 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1853 int br_mst_fill_info(struct sk_buff *skb,
1854                      const struct net_bridge_vlan_group *vg);
1855 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1856                    struct netlink_ext_ack *extack);
1857 #else
1858 static inline bool br_mst_is_enabled(struct net_bridge *br)
1859 {
1860         return false;
1861 }
1862
1863 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1864                                    u8 state, struct netlink_ext_ack *extack)
1865 {
1866         return -EOPNOTSUPP;
1867 }
1868
1869 static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1870                                      struct netlink_ext_ack *extack)
1871 {
1872         return -EOPNOTSUPP;
1873 }
1874
1875 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1876 {
1877         return 0;
1878 }
1879
1880 static inline int br_mst_fill_info(struct sk_buff *skb,
1881                                    const struct net_bridge_vlan_group *vg)
1882 {
1883         return -EOPNOTSUPP;
1884 }
1885
1886 static inline int br_mst_process(struct net_bridge_port *p,
1887                                  const struct nlattr *mst_attr,
1888                                  struct netlink_ext_ack *extack)
1889 {
1890         return -EOPNOTSUPP;
1891 }
1892 #endif
1893
1894 struct nf_br_ops {
1895         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1896 };
1897 extern const struct nf_br_ops __rcu *nf_br_ops;
1898
1899 /* br_netfilter.c */
1900 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1901 int br_nf_core_init(void);
1902 void br_nf_core_fini(void);
1903 void br_netfilter_rtable_init(struct net_bridge *);
1904 #else
1905 static inline int br_nf_core_init(void) { return 0; }
1906 static inline void br_nf_core_fini(void) {}
1907 #define br_netfilter_rtable_init(x)
1908 #endif
1909
1910 /* br_stp.c */
1911 void br_set_state(struct net_bridge_port *p, unsigned int state);
1912 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1913 void br_init_port(struct net_bridge_port *p);
1914 void br_become_designated_port(struct net_bridge_port *p);
1915
1916 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1917 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1918 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1919 int br_set_max_age(struct net_bridge *br, unsigned long x);
1920 int __set_ageing_time(struct net_device *dev, unsigned long t);
1921 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1922
1923
1924 /* br_stp_if.c */
1925 void br_stp_enable_bridge(struct net_bridge *br);
1926 void br_stp_disable_bridge(struct net_bridge *br);
1927 int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1928                        struct netlink_ext_ack *extack);
1929 void br_stp_enable_port(struct net_bridge_port *p);
1930 void br_stp_disable_port(struct net_bridge_port *p);
1931 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1932 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1933 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1934 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1935 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1936 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1937
1938 /* br_stp_bpdu.c */
1939 struct stp_proto;
1940 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1941                 struct net_device *dev);
1942
1943 /* br_stp_timer.c */
1944 void br_stp_timer_init(struct net_bridge *br);
1945 void br_stp_port_timer_init(struct net_bridge_port *p);
1946 unsigned long br_timer_value(const struct timer_list *timer);
1947
1948 /* br.c */
1949 #if IS_ENABLED(CONFIG_ATM_LANE)
1950 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1951 #endif
1952
1953 /* br_mrp.c */
1954 #if IS_ENABLED(CONFIG_BRIDGE_MRP)
1955 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1956                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1957 bool br_mrp_enabled(struct net_bridge *br);
1958 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1959 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1960 #else
1961 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1962                                struct nlattr *attr, int cmd,
1963                                struct netlink_ext_ack *extack)
1964 {
1965         return -EOPNOTSUPP;
1966 }
1967
1968 static inline bool br_mrp_enabled(struct net_bridge *br)
1969 {
1970         return false;
1971 }
1972
1973 static inline void br_mrp_port_del(struct net_bridge *br,
1974                                    struct net_bridge_port *p)
1975 {
1976 }
1977
1978 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1979 {
1980         return 0;
1981 }
1982
1983 #endif
1984
1985 /* br_cfm.c */
1986 #if IS_ENABLED(CONFIG_BRIDGE_CFM)
1987 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1988                  struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1989 bool br_cfm_created(struct net_bridge *br);
1990 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1991 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1992 int br_cfm_status_fill_info(struct sk_buff *skb,
1993                             struct net_bridge *br,
1994                             bool getlink);
1995 int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1996 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1997 #else
1998 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1999                                struct nlattr *attr, int cmd,
2000                                struct netlink_ext_ack *extack)
2001 {
2002         return -EOPNOTSUPP;
2003 }
2004
2005 static inline bool br_cfm_created(struct net_bridge *br)
2006 {
2007         return false;
2008 }
2009
2010 static inline void br_cfm_port_del(struct net_bridge *br,
2011                                    struct net_bridge_port *p)
2012 {
2013 }
2014
2015 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2016 {
2017         return -EOPNOTSUPP;
2018 }
2019
2020 static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2021                                           struct net_bridge *br,
2022                                           bool getlink)
2023 {
2024         return -EOPNOTSUPP;
2025 }
2026
2027 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2028 {
2029         *count = 0;
2030         return -EOPNOTSUPP;
2031 }
2032
2033 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2034 {
2035         *count = 0;
2036         return -EOPNOTSUPP;
2037 }
2038 #endif
2039
2040 /* br_netlink.c */
2041 extern struct rtnl_link_ops br_link_ops;
2042 int br_netlink_init(void);
2043 void br_netlink_fini(void);
2044 void br_ifinfo_notify(int event, const struct net_bridge *br,
2045                       const struct net_bridge_port *port);
2046 void br_info_notify(int event, const struct net_bridge *br,
2047                     const struct net_bridge_port *port, u32 filter);
2048 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2049                struct netlink_ext_ack *extack);
2050 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2051 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2052                u32 filter_mask, int nlflags);
2053 int br_process_vlan_info(struct net_bridge *br,
2054                          struct net_bridge_port *p, int cmd,
2055                          struct bridge_vlan_info *vinfo_curr,
2056                          struct bridge_vlan_info **vinfo_last,
2057                          bool *changed,
2058                          struct netlink_ext_ack *extack);
2059
2060 #ifdef CONFIG_SYSFS
2061 /* br_sysfs_if.c */
2062 extern const struct sysfs_ops brport_sysfs_ops;
2063 int br_sysfs_addif(struct net_bridge_port *p);
2064 int br_sysfs_renameif(struct net_bridge_port *p);
2065
2066 /* br_sysfs_br.c */
2067 int br_sysfs_addbr(struct net_device *dev);
2068 void br_sysfs_delbr(struct net_device *dev);
2069
2070 #else
2071
2072 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2073 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2074 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2075 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2076 #endif /* CONFIG_SYSFS */
2077
2078 /* br_switchdev.c */
2079 #ifdef CONFIG_NET_SWITCHDEV
2080 int br_switchdev_port_offload(struct net_bridge_port *p,
2081                               struct net_device *dev, const void *ctx,
2082                               struct notifier_block *atomic_nb,
2083                               struct notifier_block *blocking_nb,
2084                               bool tx_fwd_offload,
2085                               struct netlink_ext_ack *extack);
2086
2087 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2088                                  struct notifier_block *atomic_nb,
2089                                  struct notifier_block *blocking_nb);
2090
2091 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2092
2093 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2094
2095 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2096                                              struct sk_buff *skb);
2097 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2098                                               struct sk_buff *skb);
2099 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2100                               struct sk_buff *skb);
2101 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2102                                   const struct sk_buff *skb);
2103 int br_switchdev_set_port_flag(struct net_bridge_port *p,
2104                                unsigned long flags,
2105                                unsigned long mask,
2106                                struct netlink_ext_ack *extack);
2107 void br_switchdev_fdb_notify(struct net_bridge *br,
2108                              const struct net_bridge_fdb_entry *fdb, int type);
2109 void br_switchdev_mdb_notify(struct net_device *dev,
2110                              struct net_bridge_mdb_entry *mp,
2111                              struct net_bridge_port_group *pg,
2112                              int type);
2113 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2114                                bool changed, struct netlink_ext_ack *extack);
2115 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2116 void br_switchdev_init(struct net_bridge *br);
2117
2118 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2119 {
2120         skb->offload_fwd_mark = 0;
2121 }
2122 #else
2123 static inline int
2124 br_switchdev_port_offload(struct net_bridge_port *p,
2125                           struct net_device *dev, const void *ctx,
2126                           struct notifier_block *atomic_nb,
2127                           struct notifier_block *blocking_nb,
2128                           bool tx_fwd_offload,
2129                           struct netlink_ext_ack *extack)
2130 {
2131         return -EOPNOTSUPP;
2132 }
2133
2134 static inline void
2135 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2136                             struct notifier_block *atomic_nb,
2137                             struct notifier_block *blocking_nb)
2138 {
2139 }
2140
2141 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2142 {
2143         return false;
2144 }
2145
2146 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2147 {
2148 }
2149
2150 static inline void
2151 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2152                                         struct sk_buff *skb)
2153 {
2154 }
2155
2156 static inline void
2157 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2158                                          struct sk_buff *skb)
2159 {
2160 }
2161
2162 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2163                                             struct sk_buff *skb)
2164 {
2165 }
2166
2167 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2168                                                 const struct sk_buff *skb)
2169 {
2170         return true;
2171 }
2172
2173 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2174                                              unsigned long flags,
2175                                              unsigned long mask,
2176                                              struct netlink_ext_ack *extack)
2177 {
2178         return 0;
2179 }
2180
2181 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2182                                              u16 flags, bool changed,
2183                                              struct netlink_ext_ack *extack)
2184 {
2185         return -EOPNOTSUPP;
2186 }
2187
2188 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2189 {
2190         return -EOPNOTSUPP;
2191 }
2192
2193 static inline void
2194 br_switchdev_fdb_notify(struct net_bridge *br,
2195                         const struct net_bridge_fdb_entry *fdb, int type)
2196 {
2197 }
2198
2199 static inline void br_switchdev_mdb_notify(struct net_device *dev,
2200                                            struct net_bridge_mdb_entry *mp,
2201                                            struct net_bridge_port_group *pg,
2202                                            int type)
2203 {
2204 }
2205
2206 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2207 {
2208 }
2209
2210 static inline void br_switchdev_init(struct net_bridge *br)
2211 {
2212 }
2213
2214 #endif /* CONFIG_NET_SWITCHDEV */
2215
2216 /* br_arp_nd_proxy.c */
2217 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2218 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2219                               u16 vid, struct net_bridge_port *p);
2220 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2221                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2222 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2223 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2224 #endif