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