net/bridge/br_private.h

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