net/bridge/br_private.h

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