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