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