git.rot13.org Git - linux/blob - net/bridge/br_private.h

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12
  13 #ifndef _BR_PRIVATE_H
  14 #define _BR_PRIVATE_H
  15
  16 #include <linux/netdevice.h>
  17 #include <linux/if_bridge.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/u64_stats_sync.h>
  20 #include <net/route.h>
  21 #include <net/ip6_fib.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/rhashtable.h>
  24 #include <linux/refcount.h>
  25
  26 #define BR_HASH_BITS 8
  27 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  28
  29 #define BR_HOLD_TIME (1*HZ)
  30
  31 #define BR_PORT_BITS    10
  32 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  33
  34 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  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 typedef struct bridge_id bridge_id;
  56 typedef struct mac_addr mac_addr;
  57 typedef __u16 port_id;
  58
  59 struct bridge_id {
  60         unsigned char   prio[2];
  61         unsigned char   addr[ETH_ALEN];
  62 };
  63
  64 struct mac_addr {
  65         unsigned char   addr[ETH_ALEN];
  66 };
  67
  68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  69 /* our own querier */
  70 struct bridge_mcast_own_query {
  71         struct timer_list       timer;
  72         u32                     startup_sent;
  73 };
  74
  75 /* other querier */
  76 struct bridge_mcast_other_query {
  77         struct timer_list               timer;
  78         unsigned long                   delay_time;
  79 };
  80
  81 /* selected querier */
  82 struct bridge_mcast_querier {
  83         struct br_ip addr;
  84         struct net_bridge_port __rcu    *port;
  85 };
  86
  87 /* IGMP/MLD statistics */
  88 struct bridge_mcast_stats {
  89         struct br_mcast_stats mstats;
  90         struct u64_stats_sync syncp;
  91 };
  92 #endif
  93
  94 struct br_vlan_stats {
  95         u64 rx_bytes;
  96         u64 rx_packets;
  97         u64 tx_bytes;
  98         u64 tx_packets;
  99         struct u64_stats_sync syncp;
 100 };
 101
 102 struct br_tunnel_info {
 103         __be64                  tunnel_id;
 104         struct metadata_dst     *tunnel_dst;
 105 };
 106
 107 /* private vlan flags */
 108 enum {
 109         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 110 };
 111
 112 /**
 113  * struct net_bridge_vlan - per-vlan entry
 114  *
 115  * @vnode: rhashtable member
 116  * @vid: VLAN id
 117  * @flags: bridge vlan flags
 118  * @priv_flags: private (in-kernel) bridge vlan flags
 119  * @stats: per-cpu VLAN statistics
 120  * @br: if MASTER flag set, this points to a bridge struct
 121  * @port: if MASTER flag unset, this points to a port struct
 122  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 123  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 124  *          for this VLAN entry
 125  * @vlist: sorted list of VLAN entries
 126  * @rcu: used for entry destruction
 127  *
 128  * This structure is shared between the global per-VLAN entries contained in
 129  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 130  * the port's rhashtable. The union entries should be interpreted depending on
 131  * the entry flags that are set.
 132  */
 133 struct net_bridge_vlan {
 134         struct rhash_head               vnode;
 135         struct rhash_head               tnode;
 136         u16                             vid;
 137         u16                             flags;
 138         u16                             priv_flags;
 139         struct br_vlan_stats __percpu   *stats;
 140         union {
 141                 struct net_bridge       *br;
 142                 struct net_bridge_port  *port;
 143         };
 144         union {
 145                 refcount_t              refcnt;
 146                 struct net_bridge_vlan  *brvlan;
 147         };
 148
 149         struct br_tunnel_info           tinfo;
 150
 151         struct list_head                vlist;
 152
 153         struct rcu_head                 rcu;
 154 };
 155
 156 /**
 157  * struct net_bridge_vlan_group
 158  *
 159  * @vlan_hash: VLAN entry rhashtable
 160  * @vlan_list: sorted VLAN entry list
 161  * @num_vlans: number of total VLAN entries
 162  * @pvid: PVID VLAN id
 163  *
 164  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 165  *            primitives because the bridge can have entries in its list which
 166  *            are just for global context but not for filtering, i.e. they have
 167  *            the master flag set but not the brentry flag. If you have to check
 168  *            if there're "real" entries in the bridge please test @num_vlans
 169  */
 170 struct net_bridge_vlan_group {
 171         struct rhashtable               vlan_hash;
 172         struct rhashtable               tunnel_hash;
 173         struct list_head                vlan_list;
 174         u16                             num_vlans;
 175         u16                             pvid;
 176 };
 177
 178 struct net_bridge_fdb_key {
 179         mac_addr addr;
 180         u16 vlan_id;
 181 };
 182
 183 struct net_bridge_fdb_entry {
 184         struct rhash_head               rhnode;
 185         struct net_bridge_port          *dst;
 186
 187         struct net_bridge_fdb_key       key;
 188         struct hlist_node               fdb_node;
 189         unsigned char                   is_local:1,
 190                                         is_static:1,
 191                                         is_sticky:1,
 192                                         added_by_user:1,
 193                                         added_by_external_learn:1,
 194                                         offloaded:1;
 195
 196         /* write-heavy members should not affect lookups */
 197         unsigned long                   updated ____cacheline_aligned_in_smp;
 198         unsigned long                   used;
 199
 200         struct rcu_head                 rcu;
 201 };
 202
 203 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 204 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 205
 206 struct net_bridge_port_group {
 207         struct net_bridge_port          *port;
 208         struct net_bridge_port_group __rcu *next;
 209         struct hlist_node               mglist;
 210         struct rcu_head                 rcu;
 211         struct timer_list               timer;
 212         struct br_ip                    addr;
 213         unsigned char                   flags;
 214         unsigned char                   eth_addr[ETH_ALEN];
 215 };
 216
 217 struct net_bridge_mdb_entry {
 218         struct rhash_head               rhnode;
 219         struct net_bridge               *br;
 220         struct net_bridge_port_group __rcu *ports;
 221         struct rcu_head                 rcu;
 222         struct timer_list               timer;
 223         struct br_ip                    addr;
 224         bool                            host_joined;
 225         struct hlist_node               mdb_node;
 226 };
 227
 228 struct net_bridge_port {
 229         struct net_bridge               *br;
 230         struct net_device               *dev;
 231         struct list_head                list;
 232
 233         unsigned long                   flags;
 234 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 235         struct net_bridge_vlan_group    __rcu *vlgrp;
 236 #endif
 237         struct net_bridge_port          __rcu *backup_port;
 238
 239         /* STP */
 240         u8                              priority;
 241         u8                              state;
 242         u16                             port_no;
 243         unsigned char                   topology_change_ack;
 244         unsigned char                   config_pending;
 245         port_id                         port_id;
 246         port_id                         designated_port;
 247         bridge_id                       designated_root;
 248         bridge_id                       designated_bridge;
 249         u32                             path_cost;
 250         u32                             designated_cost;
 251         unsigned long                   designated_age;
 252
 253         struct timer_list               forward_delay_timer;
 254         struct timer_list               hold_timer;
 255         struct timer_list               message_age_timer;
 256         struct kobject                  kobj;
 257         struct rcu_head                 rcu;
 258
 259 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 260         struct bridge_mcast_own_query   ip4_own_query;
 261 #if IS_ENABLED(CONFIG_IPV6)
 262         struct bridge_mcast_own_query   ip6_own_query;
 263 #endif /* IS_ENABLED(CONFIG_IPV6) */
 264         unsigned char                   multicast_router;
 265         struct bridge_mcast_stats       __percpu *mcast_stats;
 266         struct timer_list               multicast_router_timer;
 267         struct hlist_head               mglist;
 268         struct hlist_node               rlist;
 269 #endif
 270
 271 #ifdef CONFIG_SYSFS
 272         char                            sysfs_name[IFNAMSIZ];
 273 #endif
 274
 275 #ifdef CONFIG_NET_POLL_CONTROLLER
 276         struct netpoll                  *np;
 277 #endif
 278 #ifdef CONFIG_NET_SWITCHDEV
 279         int                             offload_fwd_mark;
 280 #endif
 281         u16                             group_fwd_mask;
 282         u16                             backup_redirected_cnt;
 283 };
 284
 285 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 286
 287 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 288 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 289
 290 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 291
 292 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 293 {
 294         return rcu_dereference(dev->rx_handler_data);
 295 }
 296
 297 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 298 {
 299         return br_port_exists(dev) ?
 300                 rtnl_dereference(dev->rx_handler_data) : NULL;
 301 }
 302
 303 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 304 {
 305         return br_port_exists(dev) ?
 306                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 307 }
 308
 309 enum net_bridge_opts {
 310         BROPT_VLAN_ENABLED,
 311         BROPT_VLAN_STATS_ENABLED,
 312         BROPT_NF_CALL_IPTABLES,
 313         BROPT_NF_CALL_IP6TABLES,
 314         BROPT_NF_CALL_ARPTABLES,
 315         BROPT_GROUP_ADDR_SET,
 316         BROPT_MULTICAST_ENABLED,
 317         BROPT_MULTICAST_QUERIER,
 318         BROPT_MULTICAST_QUERY_USE_IFADDR,
 319         BROPT_MULTICAST_STATS_ENABLED,
 320         BROPT_HAS_IPV6_ADDR,
 321         BROPT_NEIGH_SUPPRESS_ENABLED,
 322         BROPT_MTU_SET_BY_USER,
 323         BROPT_VLAN_STATS_PER_PORT,
 324         BROPT_NO_LL_LEARN,
 325 };
 326
 327 struct net_bridge {
 328         spinlock_t                      lock;
 329         spinlock_t                      hash_lock;
 330         struct list_head                port_list;
 331         struct net_device               *dev;
 332         struct pcpu_sw_netstats         __percpu *stats;
 333         unsigned long                   options;
 334         /* These fields are accessed on each packet */
 335 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 336         __be16                          vlan_proto;
 337         u16                             default_pvid;
 338         struct net_bridge_vlan_group    __rcu *vlgrp;
 339 #endif
 340
 341         struct rhashtable               fdb_hash_tbl;
 342 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 343         union {
 344                 struct rtable           fake_rtable;
 345                 struct rt6_info         fake_rt6_info;
 346         };
 347 #endif
 348         u16                             group_fwd_mask;
 349         u16                             group_fwd_mask_required;
 350
 351         /* STP */
 352         bridge_id                       designated_root;
 353         bridge_id                       bridge_id;
 354         unsigned char                   topology_change;
 355         unsigned char                   topology_change_detected;
 356         u16                             root_port;
 357         unsigned long                   max_age;
 358         unsigned long                   hello_time;
 359         unsigned long                   forward_delay;
 360         unsigned long                   ageing_time;
 361         unsigned long                   bridge_max_age;
 362         unsigned long                   bridge_hello_time;
 363         unsigned long                   bridge_forward_delay;
 364         unsigned long                   bridge_ageing_time;
 365         u32                             root_path_cost;
 366
 367         u8                              group_addr[ETH_ALEN];
 368
 369         enum {
 370                 BR_NO_STP,              /* no spanning tree */
 371                 BR_KERNEL_STP,          /* old STP in kernel */
 372                 BR_USER_STP,            /* new RSTP in userspace */
 373         } stp_enabled;
 374
 375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 376
 377         u32                             hash_max;
 378
 379         u32                             multicast_last_member_count;
 380         u32                             multicast_startup_query_count;
 381
 382         u8                              multicast_igmp_version;
 383         u8                              multicast_router;
 384 #if IS_ENABLED(CONFIG_IPV6)
 385         u8                              multicast_mld_version;
 386 #endif
 387         spinlock_t                      multicast_lock;
 388         unsigned long                   multicast_last_member_interval;
 389         unsigned long                   multicast_membership_interval;
 390         unsigned long                   multicast_querier_interval;
 391         unsigned long                   multicast_query_interval;
 392         unsigned long                   multicast_query_response_interval;
 393         unsigned long                   multicast_startup_query_interval;
 394
 395         struct rhashtable               mdb_hash_tbl;
 396
 397         struct hlist_head               mdb_list;
 398         struct hlist_head               router_list;
 399
 400         struct timer_list               multicast_router_timer;
 401         struct bridge_mcast_other_query ip4_other_query;
 402         struct bridge_mcast_own_query   ip4_own_query;
 403         struct bridge_mcast_querier     ip4_querier;
 404         struct bridge_mcast_stats       __percpu *mcast_stats;
 405 #if IS_ENABLED(CONFIG_IPV6)
 406         struct bridge_mcast_other_query ip6_other_query;
 407         struct bridge_mcast_own_query   ip6_own_query;
 408         struct bridge_mcast_querier     ip6_querier;
 409 #endif /* IS_ENABLED(CONFIG_IPV6) */
 410 #endif
 411
 412         struct timer_list               hello_timer;
 413         struct timer_list               tcn_timer;
 414         struct timer_list               topology_change_timer;
 415         struct delayed_work             gc_work;
 416         struct kobject                  *ifobj;
 417         u32                             auto_cnt;
 418
 419 #ifdef CONFIG_NET_SWITCHDEV
 420         int offload_fwd_mark;
 421 #endif
 422         struct hlist_head               fdb_list;
 423 };
 424
 425 struct br_input_skb_cb {
 426         struct net_device *brdev;
 427
 428 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 429         int igmp;
 430         int mrouters_only;
 431 #endif
 432
 433         bool proxyarp_replied;
 434         bool src_port_isolated;
 435
 436 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 437         bool vlan_filtered;
 438 #endif
 439
 440 #ifdef CONFIG_NET_SWITCHDEV
 441         int offload_fwd_mark;
 442 #endif
 443 };
 444
 445 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 446
 447 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 448 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 449 #else
 450 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 451 #endif
 452
 453 #define br_printk(level, br, format, args...)   \
 454         printk(level "%s: " format, (br)->dev->name, ##args)
 455
 456 #define br_err(__br, format, args...)                   \
 457         br_printk(KERN_ERR, __br, format, ##args)
 458 #define br_warn(__br, format, args...)                  \
 459         br_printk(KERN_WARNING, __br, format, ##args)
 460 #define br_notice(__br, format, args...)                \
 461         br_printk(KERN_NOTICE, __br, format, ##args)
 462 #define br_info(__br, format, args...)                  \
 463         br_printk(KERN_INFO, __br, format, ##args)
 464
 465 #define br_debug(br, format, args...)                   \
 466         pr_debug("%s: " format,  (br)->dev->name, ##args)
 467
 468 /* called under bridge lock */
 469 static inline int br_is_root_bridge(const struct net_bridge *br)
 470 {
 471         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 472 }
 473
 474 /* check if a VLAN entry is global */
 475 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 476 {
 477         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 478 }
 479
 480 /* check if a VLAN entry is used by the bridge */
 481 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 482 {
 483         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 484 }
 485
 486 /* check if we should use the vlan entry, returns false if it's only context */
 487 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 488 {
 489         if (br_vlan_is_master(v)) {
 490                 if (br_vlan_is_brentry(v))
 491                         return true;
 492                 else
 493                         return false;
 494         }
 495
 496         return true;
 497 }
 498
 499 static inline int br_opt_get(const struct net_bridge *br,
 500                              enum net_bridge_opts opt)
 501 {
 502         return test_bit(opt, &br->options);
 503 }
 504
 505 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 506                       struct netlink_ext_ack *extack);
 507 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 508 int br_boolopt_multi_toggle(struct net_bridge *br,
 509                             struct br_boolopt_multi *bm,
 510                             struct netlink_ext_ack *extack);
 511 void br_boolopt_multi_get(const struct net_bridge *br,
 512                           struct br_boolopt_multi *bm);
 513 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 514
 515 /* br_device.c */
 516 void br_dev_setup(struct net_device *dev);
 517 void br_dev_delete(struct net_device *dev, struct list_head *list);
 518 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 519 #ifdef CONFIG_NET_POLL_CONTROLLER
 520 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 521                                        struct sk_buff *skb)
 522 {
 523         struct netpoll *np = p->np;
 524
 525         if (np)
 526                 netpoll_send_skb(np, skb);
 527 }
 528
 529 int br_netpoll_enable(struct net_bridge_port *p);
 530 void br_netpoll_disable(struct net_bridge_port *p);
 531 #else
 532 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 533                                        struct sk_buff *skb)
 534 {
 535 }
 536
 537 static inline int br_netpoll_enable(struct net_bridge_port *p)
 538 {
 539         return 0;
 540 }
 541
 542 static inline void br_netpoll_disable(struct net_bridge_port *p)
 543 {
 544 }
 545 #endif
 546
 547 /* br_fdb.c */
 548 int br_fdb_init(void);
 549 void br_fdb_fini(void);
 550 int br_fdb_hash_init(struct net_bridge *br);
 551 void br_fdb_hash_fini(struct net_bridge *br);
 552 void br_fdb_flush(struct net_bridge *br);
 553 void br_fdb_find_delete_local(struct net_bridge *br,
 554                               const struct net_bridge_port *p,
 555                               const unsigned char *addr, u16 vid);
 556 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 557 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 558 void br_fdb_cleanup(struct work_struct *work);
 559 void br_fdb_delete_by_port(struct net_bridge *br,
 560                            const struct net_bridge_port *p, u16 vid, int do_all);
 561 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 562                                              const unsigned char *addr,
 563                                              __u16 vid);
 564 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 565 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 566                    unsigned long off);
 567 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 568                   const unsigned char *addr, u16 vid);
 569 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 570                    const unsigned char *addr, u16 vid, bool added_by_user);
 571
 572 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 573                   struct net_device *dev, const unsigned char *addr, u16 vid);
 574 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 575                const unsigned char *addr, u16 vid, u16 nlh_flags);
 576 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 577                 struct net_device *dev, struct net_device *fdev, int *idx);
 578 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 579                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 580                struct netlink_ext_ack *extack);
 581 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 582 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 583 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 584                               const unsigned char *addr, u16 vid,
 585                               bool swdev_notify);
 586 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 587                               const unsigned char *addr, u16 vid,
 588                               bool swdev_notify);
 589 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 590                           const unsigned char *addr, u16 vid, bool offloaded);
 591
 592 /* br_forward.c */
 593 enum br_pkt_type {
 594         BR_PKT_UNICAST,
 595         BR_PKT_MULTICAST,
 596         BR_PKT_BROADCAST
 597 };
 598 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 599 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 600                 bool local_rcv, bool local_orig);
 601 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 602 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 603               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 604
 605 /* return true if both source port and dest port are isolated */
 606 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 607                                    const struct sk_buff *skb)
 608 {
 609         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 610                (to->flags & BR_ISOLATED);
 611 }
 612
 613 /* br_if.c */
 614 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 615 int br_add_bridge(struct net *net, const char *name);
 616 int br_del_bridge(struct net *net, const char *name);
 617 int br_add_if(struct net_bridge *br, struct net_device *dev,
 618               struct netlink_ext_ack *extack);
 619 int br_del_if(struct net_bridge *br, struct net_device *dev);
 620 void br_mtu_auto_adjust(struct net_bridge *br);
 621 netdev_features_t br_features_recompute(struct net_bridge *br,
 622                                         netdev_features_t features);
 623 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 624 void br_manage_promisc(struct net_bridge *br);
 625 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 626
 627 /* br_input.c */
 628 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 629 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 630
 631 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 632 {
 633         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 634 }
 635
 636 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 637 {
 638         return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
 639 }
 640
 641 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 642 {
 643         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 644 }
 645
 646 static inline struct net_bridge_port *
 647 br_port_get_check_rtnl(const struct net_device *dev)
 648 {
 649         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 650 }
 651
 652 /* br_ioctl.c */
 653 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 654 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 655                              void __user *arg);
 656
 657 /* br_multicast.c */
 658 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 659 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 660                      struct sk_buff *skb, u16 vid);
 661 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 662                                         struct sk_buff *skb, u16 vid);
 663 int br_multicast_add_port(struct net_bridge_port *port);
 664 void br_multicast_del_port(struct net_bridge_port *port);
 665 void br_multicast_enable_port(struct net_bridge_port *port);
 666 void br_multicast_disable_port(struct net_bridge_port *port);
 667 void br_multicast_init(struct net_bridge *br);
 668 void br_multicast_open(struct net_bridge *br);
 669 void br_multicast_stop(struct net_bridge *br);
 670 void br_multicast_dev_del(struct net_bridge *br);
 671 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 672                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 673 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 674 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 675 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 676 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 677 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 678 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 679 #if IS_ENABLED(CONFIG_IPV6)
 680 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 681 #endif
 682 struct net_bridge_mdb_entry *
 683 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 684 struct net_bridge_mdb_entry *
 685 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 686 struct net_bridge_port_group *
 687 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 688                             struct net_bridge_port_group __rcu *next,
 689                             unsigned char flags, const unsigned char *src);
 690 int br_mdb_hash_init(struct net_bridge *br);
 691 void br_mdb_hash_fini(struct net_bridge *br);
 692 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 693                    struct br_ip *group, int type, u8 flags);
 694 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 695                    int type);
 696 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 697                         const struct sk_buff *skb, u8 type, u8 dir);
 698 int br_multicast_init_stats(struct net_bridge *br);
 699 void br_multicast_uninit_stats(struct net_bridge *br);
 700 void br_multicast_get_stats(const struct net_bridge *br,
 701                             const struct net_bridge_port *p,
 702                             struct br_mcast_stats *dest);
 703 void br_mdb_init(void);
 704 void br_mdb_uninit(void);
 705
 706 #define mlock_dereference(X, br) \
 707         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 708
 709 static inline bool br_multicast_is_router(struct net_bridge *br)
 710 {
 711         return br->multicast_router == 2 ||
 712                (br->multicast_router == 1 &&
 713                 timer_pending(&br->multicast_router_timer));
 714 }
 715
 716 static inline bool
 717 __br_multicast_querier_exists(struct net_bridge *br,
 718                                 struct bridge_mcast_other_query *querier,
 719                                 const bool is_ipv6)
 720 {
 721         bool own_querier_enabled;
 722
 723         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 724                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 725                         own_querier_enabled = false;
 726                 else
 727                         own_querier_enabled = true;
 728         } else {
 729                 own_querier_enabled = false;
 730         }
 731
 732         return time_is_before_jiffies(querier->delay_time) &&
 733                (own_querier_enabled || timer_pending(&querier->timer));
 734 }
 735
 736 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 737                                                struct ethhdr *eth)
 738 {
 739         switch (eth->h_proto) {
 740         case (htons(ETH_P_IP)):
 741                 return __br_multicast_querier_exists(br,
 742                         &br->ip4_other_query, false);
 743 #if IS_ENABLED(CONFIG_IPV6)
 744         case (htons(ETH_P_IPV6)):
 745                 return __br_multicast_querier_exists(br,
 746                         &br->ip6_other_query, true);
 747 #endif
 748         default:
 749                 return false;
 750         }
 751 }
 752
 753 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 754 {
 755         return BR_INPUT_SKB_CB(skb)->igmp;
 756 }
 757 #else
 758 static inline int br_multicast_rcv(struct net_bridge *br,
 759                                    struct net_bridge_port *port,
 760                                    struct sk_buff *skb,
 761                                    u16 vid)
 762 {
 763         return 0;
 764 }
 765
 766 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 767                                                       struct sk_buff *skb, u16 vid)
 768 {
 769         return NULL;
 770 }
 771
 772 static inline int br_multicast_add_port(struct net_bridge_port *port)
 773 {
 774         return 0;
 775 }
 776
 777 static inline void br_multicast_del_port(struct net_bridge_port *port)
 778 {
 779 }
 780
 781 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 782 {
 783 }
 784
 785 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 786 {
 787 }
 788
 789 static inline void br_multicast_init(struct net_bridge *br)
 790 {
 791 }
 792
 793 static inline void br_multicast_open(struct net_bridge *br)
 794 {
 795 }
 796
 797 static inline void br_multicast_stop(struct net_bridge *br)
 798 {
 799 }
 800
 801 static inline void br_multicast_dev_del(struct net_bridge *br)
 802 {
 803 }
 804
 805 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 806                                       struct sk_buff *skb,
 807                                       bool local_rcv, bool local_orig)
 808 {
 809 }
 810
 811 static inline bool br_multicast_is_router(struct net_bridge *br)
 812 {
 813         return false;
 814 }
 815
 816 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 817                                                struct ethhdr *eth)
 818 {
 819         return false;
 820 }
 821
 822 static inline void br_mdb_init(void)
 823 {
 824 }
 825
 826 static inline void br_mdb_uninit(void)
 827 {
 828 }
 829
 830 static inline int br_mdb_hash_init(struct net_bridge *br)
 831 {
 832         return 0;
 833 }
 834
 835 static inline void br_mdb_hash_fini(struct net_bridge *br)
 836 {
 837 }
 838
 839 static inline void br_multicast_count(struct net_bridge *br,
 840                                       const struct net_bridge_port *p,
 841                                       const struct sk_buff *skb,
 842                                       u8 type, u8 dir)
 843 {
 844 }
 845
 846 static inline int br_multicast_init_stats(struct net_bridge *br)
 847 {
 848         return 0;
 849 }
 850
 851 static inline void br_multicast_uninit_stats(struct net_bridge *br)
 852 {
 853 }
 854
 855 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 856 {
 857         return 0;
 858 }
 859 #endif
 860
 861 /* br_vlan.c */
 862 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 863 bool br_allowed_ingress(const struct net_bridge *br,
 864                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 865                         u16 *vid);
 866 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 867                        const struct sk_buff *skb);
 868 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 869 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 870                                const struct net_bridge_port *port,
 871                                struct net_bridge_vlan_group *vg,
 872                                struct sk_buff *skb);
 873 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 874                 bool *changed, struct netlink_ext_ack *extack);
 875 int br_vlan_delete(struct net_bridge *br, u16 vid);
 876 void br_vlan_flush(struct net_bridge *br);
 877 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 878 void br_recalculate_fwd_mask(struct net_bridge *br);
 879 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 880 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 881 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
 882 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 883 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
 884 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
 885 int br_vlan_init(struct net_bridge *br);
 886 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
 887 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 888                                struct netlink_ext_ack *extack);
 889 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 890                  bool *changed, struct netlink_ext_ack *extack);
 891 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 892 void nbp_vlan_flush(struct net_bridge_port *port);
 893 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
 894 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 895 void br_vlan_get_stats(const struct net_bridge_vlan *v,
 896                        struct br_vlan_stats *stats);
 897
 898 static inline struct net_bridge_vlan_group *br_vlan_group(
 899                                         const struct net_bridge *br)
 900 {
 901         return rtnl_dereference(br->vlgrp);
 902 }
 903
 904 static inline struct net_bridge_vlan_group *nbp_vlan_group(
 905                                         const struct net_bridge_port *p)
 906 {
 907         return rtnl_dereference(p->vlgrp);
 908 }
 909
 910 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
 911                                         const struct net_bridge *br)
 912 {
 913         return rcu_dereference(br->vlgrp);
 914 }
 915
 916 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
 917                                         const struct net_bridge_port *p)
 918 {
 919         return rcu_dereference(p->vlgrp);
 920 }
 921
 922 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 923  * skb, the vlan tag will always be present if the frame was tagged.
 924  */
 925 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 926 {
 927         int err = 0;
 928
 929         if (skb_vlan_tag_present(skb)) {
 930                 *vid = skb_vlan_tag_get_id(skb);
 931         } else {
 932                 *vid = 0;
 933                 err = -EINVAL;
 934         }
 935
 936         return err;
 937 }
 938
 939 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
 940 {
 941         if (!vg)
 942                 return 0;
 943
 944         smp_rmb();
 945         return vg->pvid;
 946 }
 947
 948 #else
 949 static inline bool br_allowed_ingress(const struct net_bridge *br,
 950                                       struct net_bridge_vlan_group *vg,
 951                                       struct sk_buff *skb,
 952                                       u16 *vid)
 953 {
 954         return true;
 955 }
 956
 957 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 958                                      const struct sk_buff *skb)
 959 {
 960         return true;
 961 }
 962
 963 static inline bool br_should_learn(struct net_bridge_port *p,
 964                                    struct sk_buff *skb, u16 *vid)
 965 {
 966         return true;
 967 }
 968
 969 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 970                                              const struct net_bridge_port *port,
 971                                              struct net_bridge_vlan_group *vg,
 972                                              struct sk_buff *skb)
 973 {
 974         return skb;
 975 }
 976
 977 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 978                               bool *changed, struct netlink_ext_ack *extack)
 979 {
 980         *changed = false;
 981         return -EOPNOTSUPP;
 982 }
 983
 984 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 985 {
 986         return -EOPNOTSUPP;
 987 }
 988
 989 static inline void br_vlan_flush(struct net_bridge *br)
 990 {
 991 }
 992
 993 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
 994 {
 995 }
 996
 997 static inline int br_vlan_init(struct net_bridge *br)
 998 {
 999         return 0;
1000 }
1001
1002 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1003                                bool *changed, struct netlink_ext_ack *extack)
1004 {
1005         *changed = false;
1006         return -EOPNOTSUPP;
1007 }
1008
1009 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1010 {
1011         return -EOPNOTSUPP;
1012 }
1013
1014 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1015 {
1016 }
1017
1018 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1019                                                    u16 vid)
1020 {
1021         return NULL;
1022 }
1023
1024 static inline int nbp_vlan_init(struct net_bridge_port *port,
1025                                 struct netlink_ext_ack *extack)
1026 {
1027         return 0;
1028 }
1029
1030 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1031 {
1032         return 0;
1033 }
1034
1035 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1036 {
1037         return 0;
1038 }
1039
1040 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1041                                           unsigned long val)
1042 {
1043         return -EOPNOTSUPP;
1044 }
1045
1046 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1047                                          u32 filter_mask)
1048 {
1049         return 0;
1050 }
1051
1052 static inline struct net_bridge_vlan_group *br_vlan_group(
1053                                         const struct net_bridge *br)
1054 {
1055         return NULL;
1056 }
1057
1058 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1059                                         const struct net_bridge_port *p)
1060 {
1061         return NULL;
1062 }
1063
1064 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1065                                         const struct net_bridge *br)
1066 {
1067         return NULL;
1068 }
1069
1070 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1071                                         const struct net_bridge_port *p)
1072 {
1073         return NULL;
1074 }
1075
1076 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1077                                      struct br_vlan_stats *stats)
1078 {
1079 }
1080 #endif
1081
1082 struct nf_br_ops {
1083         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1084 };
1085 extern const struct nf_br_ops __rcu *nf_br_ops;
1086
1087 /* br_netfilter.c */
1088 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1089 int br_nf_core_init(void);
1090 void br_nf_core_fini(void);
1091 void br_netfilter_rtable_init(struct net_bridge *);
1092 #else
1093 static inline int br_nf_core_init(void) { return 0; }
1094 static inline void br_nf_core_fini(void) {}
1095 #define br_netfilter_rtable_init(x)
1096 #endif
1097
1098 /* br_stp.c */
1099 void br_set_state(struct net_bridge_port *p, unsigned int state);
1100 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1101 void br_init_port(struct net_bridge_port *p);
1102 void br_become_designated_port(struct net_bridge_port *p);
1103
1104 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1105 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1106 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1107 int br_set_max_age(struct net_bridge *br, unsigned long x);
1108 int __set_ageing_time(struct net_device *dev, unsigned long t);
1109 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1110
1111
1112 /* br_stp_if.c */
1113 void br_stp_enable_bridge(struct net_bridge *br);
1114 void br_stp_disable_bridge(struct net_bridge *br);
1115 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1116 void br_stp_enable_port(struct net_bridge_port *p);
1117 void br_stp_disable_port(struct net_bridge_port *p);
1118 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1119 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1120 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1121 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1122 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1123 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1124
1125 /* br_stp_bpdu.c */
1126 struct stp_proto;
1127 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1128                 struct net_device *dev);
1129
1130 /* br_stp_timer.c */
1131 void br_stp_timer_init(struct net_bridge *br);
1132 void br_stp_port_timer_init(struct net_bridge_port *p);
1133 unsigned long br_timer_value(const struct timer_list *timer);
1134
1135 /* br.c */
1136 #if IS_ENABLED(CONFIG_ATM_LANE)
1137 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1138 #endif
1139
1140 /* br_netlink.c */
1141 extern struct rtnl_link_ops br_link_ops;
1142 int br_netlink_init(void);
1143 void br_netlink_fini(void);
1144 void br_ifinfo_notify(int event, const struct net_bridge *br,
1145                       const struct net_bridge_port *port);
1146 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1147                struct netlink_ext_ack *extack);
1148 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1149 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1150                u32 filter_mask, int nlflags);
1151
1152 #ifdef CONFIG_SYSFS
1153 /* br_sysfs_if.c */
1154 extern const struct sysfs_ops brport_sysfs_ops;
1155 int br_sysfs_addif(struct net_bridge_port *p);
1156 int br_sysfs_renameif(struct net_bridge_port *p);
1157
1158 /* br_sysfs_br.c */
1159 int br_sysfs_addbr(struct net_device *dev);
1160 void br_sysfs_delbr(struct net_device *dev);
1161
1162 #else
1163
1164 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1165 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1166 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1167 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1168 #endif /* CONFIG_SYSFS */
1169
1170 /* br_switchdev.c */
1171 #ifdef CONFIG_NET_SWITCHDEV
1172 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1173 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1174                               struct sk_buff *skb);
1175 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1176                                   const struct sk_buff *skb);
1177 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1178                                unsigned long flags,
1179                                unsigned long mask);
1180 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1181                              int type);
1182 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1183                                struct netlink_ext_ack *extack);
1184 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1185
1186 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1187 {
1188         skb->offload_fwd_mark = 0;
1189 }
1190 #else
1191 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1192 {
1193         return 0;
1194 }
1195
1196 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1197                                             struct sk_buff *skb)
1198 {
1199 }
1200
1201 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1202                                                 const struct sk_buff *skb)
1203 {
1204         return true;
1205 }
1206
1207 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1208                                              unsigned long flags,
1209                                              unsigned long mask)
1210 {
1211         return 0;
1212 }
1213
1214 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1215                                              u16 vid, u16 flags,
1216                                              struct netlink_ext_ack *extack)
1217 {
1218         return -EOPNOTSUPP;
1219 }
1220
1221 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1222 {
1223         return -EOPNOTSUPP;
1224 }
1225
1226 static inline void
1227 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1228 {
1229 }
1230
1231 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1232 {
1233 }
1234 #endif /* CONFIG_NET_SWITCHDEV */
1235
1236 /* br_arp_nd_proxy.c */
1237 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1238 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1239                               u16 vid, struct net_bridge_port *p);
1240 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1241                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1242 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1243 #endif