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         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 111 };
 112
 113 /**
 114  * struct net_bridge_vlan - per-vlan entry
 115  *
 116  * @vnode: rhashtable member
 117  * @vid: VLAN id
 118  * @flags: bridge vlan flags
 119  * @priv_flags: private (in-kernel) bridge vlan flags
 120  * @stats: per-cpu VLAN statistics
 121  * @br: if MASTER flag set, this points to a bridge struct
 122  * @port: if MASTER flag unset, this points to a port struct
 123  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 124  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 125  *          for this VLAN entry
 126  * @vlist: sorted list of VLAN entries
 127  * @rcu: used for entry destruction
 128  *
 129  * This structure is shared between the global per-VLAN entries contained in
 130  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 131  * the port's rhashtable. The union entries should be interpreted depending on
 132  * the entry flags that are set.
 133  */
 134 struct net_bridge_vlan {
 135         struct rhash_head               vnode;
 136         struct rhash_head               tnode;
 137         u16                             vid;
 138         u16                             flags;
 139         u16                             priv_flags;
 140         struct br_vlan_stats __percpu   *stats;
 141         union {
 142                 struct net_bridge       *br;
 143                 struct net_bridge_port  *port;
 144         };
 145         union {
 146                 refcount_t              refcnt;
 147                 struct net_bridge_vlan  *brvlan;
 148         };
 149
 150         struct br_tunnel_info           tinfo;
 151
 152         struct list_head                vlist;
 153
 154         struct rcu_head                 rcu;
 155 };
 156
 157 /**
 158  * struct net_bridge_vlan_group
 159  *
 160  * @vlan_hash: VLAN entry rhashtable
 161  * @vlan_list: sorted VLAN entry list
 162  * @num_vlans: number of total VLAN entries
 163  * @pvid: PVID VLAN id
 164  *
 165  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 166  *            primitives because the bridge can have entries in its list which
 167  *            are just for global context but not for filtering, i.e. they have
 168  *            the master flag set but not the brentry flag. If you have to check
 169  *            if there're "real" entries in the bridge please test @num_vlans
 170  */
 171 struct net_bridge_vlan_group {
 172         struct rhashtable               vlan_hash;
 173         struct rhashtable               tunnel_hash;
 174         struct list_head                vlan_list;
 175         u16                             num_vlans;
 176         u16                             pvid;
 177 };
 178
 179 struct net_bridge_fdb_key {
 180         mac_addr addr;
 181         u16 vlan_id;
 182 };
 183
 184 struct net_bridge_fdb_entry {
 185         struct rhash_head               rhnode;
 186         struct net_bridge_port          *dst;
 187
 188         struct net_bridge_fdb_key       key;
 189         struct hlist_node               fdb_node;
 190         unsigned char                   is_local:1,
 191                                         is_static:1,
 192                                         is_sticky:1,
 193                                         added_by_user:1,
 194                                         added_by_external_learn:1,
 195                                         offloaded:1;
 196
 197         /* write-heavy members should not affect lookups */
 198         unsigned long                   updated ____cacheline_aligned_in_smp;
 199         unsigned long                   used;
 200
 201         struct rcu_head                 rcu;
 202 };
 203
 204 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 205 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 206
 207 struct net_bridge_port_group {
 208         struct net_bridge_port          *port;
 209         struct net_bridge_port_group __rcu *next;
 210         struct hlist_node               mglist;
 211         struct rcu_head                 rcu;
 212         struct timer_list               timer;
 213         struct br_ip                    addr;
 214         unsigned char                   flags;
 215         unsigned char                   eth_addr[ETH_ALEN];
 216 };
 217
 218 struct net_bridge_mdb_entry {
 219         struct rhash_head               rhnode;
 220         struct net_bridge               *br;
 221         struct net_bridge_port_group __rcu *ports;
 222         struct rcu_head                 rcu;
 223         struct timer_list               timer;
 224         struct br_ip                    addr;
 225         bool                            host_joined;
 226         struct hlist_node               mdb_node;
 227 };
 228
 229 struct net_bridge_port {
 230         struct net_bridge               *br;
 231         struct net_device               *dev;
 232         struct list_head                list;
 233
 234         unsigned long                   flags;
 235 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 236         struct net_bridge_vlan_group    __rcu *vlgrp;
 237 #endif
 238         struct net_bridge_port          __rcu *backup_port;
 239
 240         /* STP */
 241         u8                              priority;
 242         u8                              state;
 243         u16                             port_no;
 244         unsigned char                   topology_change_ack;
 245         unsigned char                   config_pending;
 246         port_id                         port_id;
 247         port_id                         designated_port;
 248         bridge_id                       designated_root;
 249         bridge_id                       designated_bridge;
 250         u32                             path_cost;
 251         u32                             designated_cost;
 252         unsigned long                   designated_age;
 253
 254         struct timer_list               forward_delay_timer;
 255         struct timer_list               hold_timer;
 256         struct timer_list               message_age_timer;
 257         struct kobject                  kobj;
 258         struct rcu_head                 rcu;
 259
 260 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 261         struct bridge_mcast_own_query   ip4_own_query;
 262 #if IS_ENABLED(CONFIG_IPV6)
 263         struct bridge_mcast_own_query   ip6_own_query;
 264 #endif /* IS_ENABLED(CONFIG_IPV6) */
 265         unsigned char                   multicast_router;
 266         struct bridge_mcast_stats       __percpu *mcast_stats;
 267         struct timer_list               multicast_router_timer;
 268         struct hlist_head               mglist;
 269         struct hlist_node               rlist;
 270 #endif
 271
 272 #ifdef CONFIG_SYSFS
 273         char                            sysfs_name[IFNAMSIZ];
 274 #endif
 275
 276 #ifdef CONFIG_NET_POLL_CONTROLLER
 277         struct netpoll                  *np;
 278 #endif
 279 #ifdef CONFIG_NET_SWITCHDEV
 280         int                             offload_fwd_mark;
 281 #endif
 282         u16                             group_fwd_mask;
 283         u16                             backup_redirected_cnt;
 284 };
 285
 286 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 287
 288 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 289 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 290
 291 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
 292
 293 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 294 {
 295         return rcu_dereference(dev->rx_handler_data);
 296 }
 297
 298 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 299 {
 300         return br_port_exists(dev) ?
 301                 rtnl_dereference(dev->rx_handler_data) : NULL;
 302 }
 303
 304 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 305 {
 306         return br_port_exists(dev) ?
 307                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 308 }
 309
 310 enum net_bridge_opts {
 311         BROPT_VLAN_ENABLED,
 312         BROPT_VLAN_STATS_ENABLED,
 313         BROPT_NF_CALL_IPTABLES,
 314         BROPT_NF_CALL_IP6TABLES,
 315         BROPT_NF_CALL_ARPTABLES,
 316         BROPT_GROUP_ADDR_SET,
 317         BROPT_MULTICAST_ENABLED,
 318         BROPT_MULTICAST_QUERIER,
 319         BROPT_MULTICAST_QUERY_USE_IFADDR,
 320         BROPT_MULTICAST_STATS_ENABLED,
 321         BROPT_HAS_IPV6_ADDR,
 322         BROPT_NEIGH_SUPPRESS_ENABLED,
 323         BROPT_MTU_SET_BY_USER,
 324         BROPT_VLAN_STATS_PER_PORT,
 325         BROPT_NO_LL_LEARN,
 326 };
 327
 328 struct net_bridge {
 329         spinlock_t                      lock;
 330         spinlock_t                      hash_lock;
 331         struct list_head                port_list;
 332         struct net_device               *dev;
 333         struct pcpu_sw_netstats         __percpu *stats;
 334         unsigned long                   options;
 335         /* These fields are accessed on each packet */
 336 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 337         __be16                          vlan_proto;
 338         u16                             default_pvid;
 339         struct net_bridge_vlan_group    __rcu *vlgrp;
 340 #endif
 341
 342         struct rhashtable               fdb_hash_tbl;
 343 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 344         union {
 345                 struct rtable           fake_rtable;
 346                 struct rt6_info         fake_rt6_info;
 347         };
 348 #endif
 349         u16                             group_fwd_mask;
 350         u16                             group_fwd_mask_required;
 351
 352         /* STP */
 353         bridge_id                       designated_root;
 354         bridge_id                       bridge_id;
 355         unsigned char                   topology_change;
 356         unsigned char                   topology_change_detected;
 357         u16                             root_port;
 358         unsigned long                   max_age;
 359         unsigned long                   hello_time;
 360         unsigned long                   forward_delay;
 361         unsigned long                   ageing_time;
 362         unsigned long                   bridge_max_age;
 363         unsigned long                   bridge_hello_time;
 364         unsigned long                   bridge_forward_delay;
 365         unsigned long                   bridge_ageing_time;
 366         u32                             root_path_cost;
 367
 368         u8                              group_addr[ETH_ALEN];
 369
 370         enum {
 371                 BR_NO_STP,              /* no spanning tree */
 372                 BR_KERNEL_STP,          /* old STP in kernel */
 373                 BR_USER_STP,            /* new RSTP in userspace */
 374         } stp_enabled;
 375
 376 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 377
 378         u32                             hash_max;
 379
 380         u32                             multicast_last_member_count;
 381         u32                             multicast_startup_query_count;
 382
 383         u8                              multicast_igmp_version;
 384         u8                              multicast_router;
 385 #if IS_ENABLED(CONFIG_IPV6)
 386         u8                              multicast_mld_version;
 387 #endif
 388         spinlock_t                      multicast_lock;
 389         unsigned long                   multicast_last_member_interval;
 390         unsigned long                   multicast_membership_interval;
 391         unsigned long                   multicast_querier_interval;
 392         unsigned long                   multicast_query_interval;
 393         unsigned long                   multicast_query_response_interval;
 394         unsigned long                   multicast_startup_query_interval;
 395
 396         struct rhashtable               mdb_hash_tbl;
 397
 398         struct hlist_head               mdb_list;
 399         struct hlist_head               router_list;
 400
 401         struct timer_list               multicast_router_timer;
 402         struct bridge_mcast_other_query ip4_other_query;
 403         struct bridge_mcast_own_query   ip4_own_query;
 404         struct bridge_mcast_querier     ip4_querier;
 405         struct bridge_mcast_stats       __percpu *mcast_stats;
 406 #if IS_ENABLED(CONFIG_IPV6)
 407         struct bridge_mcast_other_query ip6_other_query;
 408         struct bridge_mcast_own_query   ip6_own_query;
 409         struct bridge_mcast_querier     ip6_querier;
 410 #endif /* IS_ENABLED(CONFIG_IPV6) */
 411 #endif
 412
 413         struct timer_list               hello_timer;
 414         struct timer_list               tcn_timer;
 415         struct timer_list               topology_change_timer;
 416         struct delayed_work             gc_work;
 417         struct kobject                  *ifobj;
 418         u32                             auto_cnt;
 419
 420 #ifdef CONFIG_NET_SWITCHDEV
 421         int offload_fwd_mark;
 422 #endif
 423         struct hlist_head               fdb_list;
 424 };
 425
 426 struct br_input_skb_cb {
 427         struct net_device *brdev;
 428
 429 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 430         int igmp;
 431         int mrouters_only;
 432 #endif
 433
 434         bool proxyarp_replied;
 435         bool src_port_isolated;
 436
 437 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 438         bool vlan_filtered;
 439 #endif
 440
 441 #ifdef CONFIG_NET_SWITCHDEV
 442         int offload_fwd_mark;
 443 #endif
 444 };
 445
 446 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 447
 448 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 449 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 450 #else
 451 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 452 #endif
 453
 454 #define br_printk(level, br, format, args...)   \
 455         printk(level "%s: " format, (br)->dev->name, ##args)
 456
 457 #define br_err(__br, format, args...)                   \
 458         br_printk(KERN_ERR, __br, format, ##args)
 459 #define br_warn(__br, format, args...)                  \
 460         br_printk(KERN_WARNING, __br, format, ##args)
 461 #define br_notice(__br, format, args...)                \
 462         br_printk(KERN_NOTICE, __br, format, ##args)
 463 #define br_info(__br, format, args...)                  \
 464         br_printk(KERN_INFO, __br, format, ##args)
 465
 466 #define br_debug(br, format, args...)                   \
 467         pr_debug("%s: " format,  (br)->dev->name, ##args)
 468
 469 /* called under bridge lock */
 470 static inline int br_is_root_bridge(const struct net_bridge *br)
 471 {
 472         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 473 }
 474
 475 /* check if a VLAN entry is global */
 476 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 477 {
 478         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 479 }
 480
 481 /* check if a VLAN entry is used by the bridge */
 482 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 483 {
 484         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 485 }
 486
 487 /* check if we should use the vlan entry, returns false if it's only context */
 488 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 489 {
 490         if (br_vlan_is_master(v)) {
 491                 if (br_vlan_is_brentry(v))
 492                         return true;
 493                 else
 494                         return false;
 495         }
 496
 497         return true;
 498 }
 499
 500 static inline int br_opt_get(const struct net_bridge *br,
 501                              enum net_bridge_opts opt)
 502 {
 503         return test_bit(opt, &br->options);
 504 }
 505
 506 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 507                       struct netlink_ext_ack *extack);
 508 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 509 int br_boolopt_multi_toggle(struct net_bridge *br,
 510                             struct br_boolopt_multi *bm,
 511                             struct netlink_ext_ack *extack);
 512 void br_boolopt_multi_get(const struct net_bridge *br,
 513                           struct br_boolopt_multi *bm);
 514 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 515
 516 /* br_device.c */
 517 void br_dev_setup(struct net_device *dev);
 518 void br_dev_delete(struct net_device *dev, struct list_head *list);
 519 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 520 #ifdef CONFIG_NET_POLL_CONTROLLER
 521 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 522                                        struct sk_buff *skb)
 523 {
 524         struct netpoll *np = p->np;
 525
 526         if (np)
 527                 netpoll_send_skb(np, skb);
 528 }
 529
 530 int br_netpoll_enable(struct net_bridge_port *p);
 531 void br_netpoll_disable(struct net_bridge_port *p);
 532 #else
 533 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 534                                        struct sk_buff *skb)
 535 {
 536 }
 537
 538 static inline int br_netpoll_enable(struct net_bridge_port *p)
 539 {
 540         return 0;
 541 }
 542
 543 static inline void br_netpoll_disable(struct net_bridge_port *p)
 544 {
 545 }
 546 #endif
 547
 548 /* br_fdb.c */
 549 int br_fdb_init(void);
 550 void br_fdb_fini(void);
 551 int br_fdb_hash_init(struct net_bridge *br);
 552 void br_fdb_hash_fini(struct net_bridge *br);
 553 void br_fdb_flush(struct net_bridge *br);
 554 void br_fdb_find_delete_local(struct net_bridge *br,
 555                               const struct net_bridge_port *p,
 556                               const unsigned char *addr, u16 vid);
 557 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 558 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 559 void br_fdb_cleanup(struct work_struct *work);
 560 void br_fdb_delete_by_port(struct net_bridge *br,
 561                            const struct net_bridge_port *p, u16 vid, int do_all);
 562 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 563                                              const unsigned char *addr,
 564                                              __u16 vid);
 565 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 566 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 567                    unsigned long off);
 568 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 569                   const unsigned char *addr, u16 vid);
 570 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 571                    const unsigned char *addr, u16 vid, bool added_by_user);
 572
 573 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 574                   struct net_device *dev, const unsigned char *addr, u16 vid);
 575 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 576                const unsigned char *addr, u16 vid, u16 nlh_flags,
 577                struct netlink_ext_ack *extack);
 578 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 579                 struct net_device *dev, struct net_device *fdev, int *idx);
 580 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 581                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 582                struct netlink_ext_ack *extack);
 583 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 584 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 585 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 586                               const unsigned char *addr, u16 vid,
 587                               bool swdev_notify);
 588 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 589                               const unsigned char *addr, u16 vid,
 590                               bool swdev_notify);
 591 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 592                           const unsigned char *addr, u16 vid, bool offloaded);
 593
 594 /* br_forward.c */
 595 enum br_pkt_type {
 596         BR_PKT_UNICAST,
 597         BR_PKT_MULTICAST,
 598         BR_PKT_BROADCAST
 599 };
 600 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 601 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 602                 bool local_rcv, bool local_orig);
 603 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 604 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 605               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 606
 607 /* return true if both source port and dest port are isolated */
 608 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 609                                    const struct sk_buff *skb)
 610 {
 611         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 612                (to->flags & BR_ISOLATED);
 613 }
 614
 615 /* br_if.c */
 616 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 617 int br_add_bridge(struct net *net, const char *name);
 618 int br_del_bridge(struct net *net, const char *name);
 619 int br_add_if(struct net_bridge *br, struct net_device *dev,
 620               struct netlink_ext_ack *extack);
 621 int br_del_if(struct net_bridge *br, struct net_device *dev);
 622 void br_mtu_auto_adjust(struct net_bridge *br);
 623 netdev_features_t br_features_recompute(struct net_bridge *br,
 624                                         netdev_features_t features);
 625 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 626 void br_manage_promisc(struct net_bridge *br);
 627 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 628
 629 /* br_input.c */
 630 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 631 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 632
 633 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 634 {
 635         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 636 }
 637
 638 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 639 {
 640         return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
 641 }
 642
 643 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 644 {
 645         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 646 }
 647
 648 static inline struct net_bridge_port *
 649 br_port_get_check_rtnl(const struct net_device *dev)
 650 {
 651         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 652 }
 653
 654 /* br_ioctl.c */
 655 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 656 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 657                              void __user *arg);
 658
 659 /* br_multicast.c */
 660 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 661 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 662                      struct sk_buff *skb, u16 vid);
 663 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 664                                         struct sk_buff *skb, u16 vid);
 665 int br_multicast_add_port(struct net_bridge_port *port);
 666 void br_multicast_del_port(struct net_bridge_port *port);
 667 void br_multicast_enable_port(struct net_bridge_port *port);
 668 void br_multicast_disable_port(struct net_bridge_port *port);
 669 void br_multicast_init(struct net_bridge *br);
 670 void br_multicast_open(struct net_bridge *br);
 671 void br_multicast_stop(struct net_bridge *br);
 672 void br_multicast_dev_del(struct net_bridge *br);
 673 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 674                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 675 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 676 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 677 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 678 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 679 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 680 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 681 #if IS_ENABLED(CONFIG_IPV6)
 682 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 683 #endif
 684 struct net_bridge_mdb_entry *
 685 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 686 struct net_bridge_mdb_entry *
 687 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 688 struct net_bridge_port_group *
 689 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 690                             struct net_bridge_port_group __rcu *next,
 691                             unsigned char flags, const unsigned char *src);
 692 int br_mdb_hash_init(struct net_bridge *br);
 693 void br_mdb_hash_fini(struct net_bridge *br);
 694 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 695                    struct br_ip *group, int type, u8 flags);
 696 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 697                    int type);
 698 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 699                         const struct sk_buff *skb, u8 type, u8 dir);
 700 int br_multicast_init_stats(struct net_bridge *br);
 701 void br_multicast_uninit_stats(struct net_bridge *br);
 702 void br_multicast_get_stats(const struct net_bridge *br,
 703                             const struct net_bridge_port *p,
 704                             struct br_mcast_stats *dest);
 705 void br_mdb_init(void);
 706 void br_mdb_uninit(void);
 707
 708 #define mlock_dereference(X, br) \
 709         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 710
 711 static inline bool br_multicast_is_router(struct net_bridge *br)
 712 {
 713         return br->multicast_router == 2 ||
 714                (br->multicast_router == 1 &&
 715                 timer_pending(&br->multicast_router_timer));
 716 }
 717
 718 static inline bool
 719 __br_multicast_querier_exists(struct net_bridge *br,
 720                                 struct bridge_mcast_other_query *querier,
 721                                 const bool is_ipv6)
 722 {
 723         bool own_querier_enabled;
 724
 725         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 726                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 727                         own_querier_enabled = false;
 728                 else
 729                         own_querier_enabled = true;
 730         } else {
 731                 own_querier_enabled = false;
 732         }
 733
 734         return time_is_before_jiffies(querier->delay_time) &&
 735                (own_querier_enabled || timer_pending(&querier->timer));
 736 }
 737
 738 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 739                                                struct ethhdr *eth)
 740 {
 741         switch (eth->h_proto) {
 742         case (htons(ETH_P_IP)):
 743                 return __br_multicast_querier_exists(br,
 744                         &br->ip4_other_query, false);
 745 #if IS_ENABLED(CONFIG_IPV6)
 746         case (htons(ETH_P_IPV6)):
 747                 return __br_multicast_querier_exists(br,
 748                         &br->ip6_other_query, true);
 749 #endif
 750         default:
 751                 return false;
 752         }
 753 }
 754
 755 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 756 {
 757         return BR_INPUT_SKB_CB(skb)->igmp;
 758 }
 759 #else
 760 static inline int br_multicast_rcv(struct net_bridge *br,
 761                                    struct net_bridge_port *port,
 762                                    struct sk_buff *skb,
 763                                    u16 vid)
 764 {
 765         return 0;
 766 }
 767
 768 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 769                                                       struct sk_buff *skb, u16 vid)
 770 {
 771         return NULL;
 772 }
 773
 774 static inline int br_multicast_add_port(struct net_bridge_port *port)
 775 {
 776         return 0;
 777 }
 778
 779 static inline void br_multicast_del_port(struct net_bridge_port *port)
 780 {
 781 }
 782
 783 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 784 {
 785 }
 786
 787 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 788 {
 789 }
 790
 791 static inline void br_multicast_init(struct net_bridge *br)
 792 {
 793 }
 794
 795 static inline void br_multicast_open(struct net_bridge *br)
 796 {
 797 }
 798
 799 static inline void br_multicast_stop(struct net_bridge *br)
 800 {
 801 }
 802
 803 static inline void br_multicast_dev_del(struct net_bridge *br)
 804 {
 805 }
 806
 807 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 808                                       struct sk_buff *skb,
 809                                       bool local_rcv, bool local_orig)
 810 {
 811 }
 812
 813 static inline bool br_multicast_is_router(struct net_bridge *br)
 814 {
 815         return false;
 816 }
 817
 818 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 819                                                struct ethhdr *eth)
 820 {
 821         return false;
 822 }
 823
 824 static inline void br_mdb_init(void)
 825 {
 826 }
 827
 828 static inline void br_mdb_uninit(void)
 829 {
 830 }
 831
 832 static inline int br_mdb_hash_init(struct net_bridge *br)
 833 {
 834         return 0;
 835 }
 836
 837 static inline void br_mdb_hash_fini(struct net_bridge *br)
 838 {
 839 }
 840
 841 static inline void br_multicast_count(struct net_bridge *br,
 842                                       const struct net_bridge_port *p,
 843                                       const struct sk_buff *skb,
 844                                       u8 type, u8 dir)
 845 {
 846 }
 847
 848 static inline int br_multicast_init_stats(struct net_bridge *br)
 849 {
 850         return 0;
 851 }
 852
 853 static inline void br_multicast_uninit_stats(struct net_bridge *br)
 854 {
 855 }
 856
 857 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 858 {
 859         return 0;
 860 }
 861 #endif
 862
 863 /* br_vlan.c */
 864 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 865 bool br_allowed_ingress(const struct net_bridge *br,
 866                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 867                         u16 *vid);
 868 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 869                        const struct sk_buff *skb);
 870 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 871 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 872                                const struct net_bridge_port *port,
 873                                struct net_bridge_vlan_group *vg,
 874                                struct sk_buff *skb);
 875 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 876                 bool *changed, struct netlink_ext_ack *extack);
 877 int br_vlan_delete(struct net_bridge *br, u16 vid);
 878 void br_vlan_flush(struct net_bridge *br);
 879 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 880 void br_recalculate_fwd_mask(struct net_bridge *br);
 881 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 882 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 883 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
 884 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 885 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
 886 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
 887 int br_vlan_init(struct net_bridge *br);
 888 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
 889 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 890                                struct netlink_ext_ack *extack);
 891 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 892                  bool *changed, struct netlink_ext_ack *extack);
 893 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 894 void nbp_vlan_flush(struct net_bridge_port *port);
 895 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
 896 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 897 void br_vlan_get_stats(const struct net_bridge_vlan *v,
 898                        struct br_vlan_stats *stats);
 899
 900 static inline struct net_bridge_vlan_group *br_vlan_group(
 901                                         const struct net_bridge *br)
 902 {
 903         return rtnl_dereference(br->vlgrp);
 904 }
 905
 906 static inline struct net_bridge_vlan_group *nbp_vlan_group(
 907                                         const struct net_bridge_port *p)
 908 {
 909         return rtnl_dereference(p->vlgrp);
 910 }
 911
 912 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
 913                                         const struct net_bridge *br)
 914 {
 915         return rcu_dereference(br->vlgrp);
 916 }
 917
 918 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
 919                                         const struct net_bridge_port *p)
 920 {
 921         return rcu_dereference(p->vlgrp);
 922 }
 923
 924 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 925  * skb, the vlan tag will always be present if the frame was tagged.
 926  */
 927 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 928 {
 929         int err = 0;
 930
 931         if (skb_vlan_tag_present(skb)) {
 932                 *vid = skb_vlan_tag_get_id(skb);
 933         } else {
 934                 *vid = 0;
 935                 err = -EINVAL;
 936         }
 937
 938         return err;
 939 }
 940
 941 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
 942 {
 943         if (!vg)
 944                 return 0;
 945
 946         smp_rmb();
 947         return vg->pvid;
 948 }
 949
 950 #else
 951 static inline bool br_allowed_ingress(const struct net_bridge *br,
 952                                       struct net_bridge_vlan_group *vg,
 953                                       struct sk_buff *skb,
 954                                       u16 *vid)
 955 {
 956         return true;
 957 }
 958
 959 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 960                                      const struct sk_buff *skb)
 961 {
 962         return true;
 963 }
 964
 965 static inline bool br_should_learn(struct net_bridge_port *p,
 966                                    struct sk_buff *skb, u16 *vid)
 967 {
 968         return true;
 969 }
 970
 971 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 972                                              const struct net_bridge_port *port,
 973                                              struct net_bridge_vlan_group *vg,
 974                                              struct sk_buff *skb)
 975 {
 976         return skb;
 977 }
 978
 979 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 980                               bool *changed, struct netlink_ext_ack *extack)
 981 {
 982         *changed = false;
 983         return -EOPNOTSUPP;
 984 }
 985
 986 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 987 {
 988         return -EOPNOTSUPP;
 989 }
 990
 991 static inline void br_vlan_flush(struct net_bridge *br)
 992 {
 993 }
 994
 995 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
 996 {
 997 }
 998
 999 static inline int br_vlan_init(struct net_bridge *br)
1000 {
1001         return 0;
1002 }
1003
1004 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1005                                bool *changed, struct netlink_ext_ack *extack)
1006 {
1007         *changed = false;
1008         return -EOPNOTSUPP;
1009 }
1010
1011 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1012 {
1013         return -EOPNOTSUPP;
1014 }
1015
1016 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1017 {
1018 }
1019
1020 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1021                                                    u16 vid)
1022 {
1023         return NULL;
1024 }
1025
1026 static inline int nbp_vlan_init(struct net_bridge_port *port,
1027                                 struct netlink_ext_ack *extack)
1028 {
1029         return 0;
1030 }
1031
1032 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1033 {
1034         return 0;
1035 }
1036
1037 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1038 {
1039         return 0;
1040 }
1041
1042 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1043                                           unsigned long val)
1044 {
1045         return -EOPNOTSUPP;
1046 }
1047
1048 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1049                                          u32 filter_mask)
1050 {
1051         return 0;
1052 }
1053
1054 static inline struct net_bridge_vlan_group *br_vlan_group(
1055                                         const struct net_bridge *br)
1056 {
1057         return NULL;
1058 }
1059
1060 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1061                                         const struct net_bridge_port *p)
1062 {
1063         return NULL;
1064 }
1065
1066 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1067                                         const struct net_bridge *br)
1068 {
1069         return NULL;
1070 }
1071
1072 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1073                                         const struct net_bridge_port *p)
1074 {
1075         return NULL;
1076 }
1077
1078 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1079                                      struct br_vlan_stats *stats)
1080 {
1081 }
1082 #endif
1083
1084 struct nf_br_ops {
1085         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1086 };
1087 extern const struct nf_br_ops __rcu *nf_br_ops;
1088
1089 /* br_netfilter.c */
1090 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1091 int br_nf_core_init(void);
1092 void br_nf_core_fini(void);
1093 void br_netfilter_rtable_init(struct net_bridge *);
1094 #else
1095 static inline int br_nf_core_init(void) { return 0; }
1096 static inline void br_nf_core_fini(void) {}
1097 #define br_netfilter_rtable_init(x)
1098 #endif
1099
1100 /* br_stp.c */
1101 void br_set_state(struct net_bridge_port *p, unsigned int state);
1102 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1103 void br_init_port(struct net_bridge_port *p);
1104 void br_become_designated_port(struct net_bridge_port *p);
1105
1106 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1107 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1108 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1109 int br_set_max_age(struct net_bridge *br, unsigned long x);
1110 int __set_ageing_time(struct net_device *dev, unsigned long t);
1111 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1112
1113
1114 /* br_stp_if.c */
1115 void br_stp_enable_bridge(struct net_bridge *br);
1116 void br_stp_disable_bridge(struct net_bridge *br);
1117 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1118 void br_stp_enable_port(struct net_bridge_port *p);
1119 void br_stp_disable_port(struct net_bridge_port *p);
1120 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1121 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1122 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1123 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1124 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1125 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1126
1127 /* br_stp_bpdu.c */
1128 struct stp_proto;
1129 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1130                 struct net_device *dev);
1131
1132 /* br_stp_timer.c */
1133 void br_stp_timer_init(struct net_bridge *br);
1134 void br_stp_port_timer_init(struct net_bridge_port *p);
1135 unsigned long br_timer_value(const struct timer_list *timer);
1136
1137 /* br.c */
1138 #if IS_ENABLED(CONFIG_ATM_LANE)
1139 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1140 #endif
1141
1142 /* br_netlink.c */
1143 extern struct rtnl_link_ops br_link_ops;
1144 int br_netlink_init(void);
1145 void br_netlink_fini(void);
1146 void br_ifinfo_notify(int event, const struct net_bridge *br,
1147                       const struct net_bridge_port *port);
1148 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1149                struct netlink_ext_ack *extack);
1150 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1151 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1152                u32 filter_mask, int nlflags);
1153
1154 #ifdef CONFIG_SYSFS
1155 /* br_sysfs_if.c */
1156 extern const struct sysfs_ops brport_sysfs_ops;
1157 int br_sysfs_addif(struct net_bridge_port *p);
1158 int br_sysfs_renameif(struct net_bridge_port *p);
1159
1160 /* br_sysfs_br.c */
1161 int br_sysfs_addbr(struct net_device *dev);
1162 void br_sysfs_delbr(struct net_device *dev);
1163
1164 #else
1165
1166 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1167 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1168 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1169 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1170 #endif /* CONFIG_SYSFS */
1171
1172 /* br_switchdev.c */
1173 #ifdef CONFIG_NET_SWITCHDEV
1174 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1175 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1176                               struct sk_buff *skb);
1177 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1178                                   const struct sk_buff *skb);
1179 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1180                                unsigned long flags,
1181                                unsigned long mask);
1182 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1183                              int type);
1184 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1185                                struct netlink_ext_ack *extack);
1186 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1187
1188 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1189 {
1190         skb->offload_fwd_mark = 0;
1191 }
1192 #else
1193 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1194 {
1195         return 0;
1196 }
1197
1198 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1199                                             struct sk_buff *skb)
1200 {
1201 }
1202
1203 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1204                                                 const struct sk_buff *skb)
1205 {
1206         return true;
1207 }
1208
1209 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1210                                              unsigned long flags,
1211                                              unsigned long mask)
1212 {
1213         return 0;
1214 }
1215
1216 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1217                                              u16 vid, u16 flags,
1218                                              struct netlink_ext_ack *extack)
1219 {
1220         return -EOPNOTSUPP;
1221 }
1222
1223 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1224 {
1225         return -EOPNOTSUPP;
1226 }
1227
1228 static inline void
1229 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1230 {
1231 }
1232
1233 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1234 {
1235 }
1236 #endif /* CONFIG_NET_SWITCHDEV */
1237
1238 /* br_arp_nd_proxy.c */
1239 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1240 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1241                               u16 vid, struct net_bridge_port *p);
1242 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1243                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1244 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1245 #endif