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