net/bridge/br_private.h

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