net/bridge/br_private.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  */
   8
   9 #ifndef _BR_PRIVATE_H
  10 #define _BR_PRIVATE_H
  11
  12 #include <linux/netdevice.h>
  13 #include <linux/if_bridge.h>
  14 #include <linux/netpoll.h>
  15 #include <linux/u64_stats_sync.h>
  16 #include <net/route.h>
  17 #include <net/ip6_fib.h>
  18 #include <linux/if_vlan.h>
  19 #include <linux/rhashtable.h>
  20 #include <linux/refcount.h>
  21
  22 #define BR_HASH_BITS 8
  23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25 #define BR_HOLD_TIME (1*HZ)
  26
  27 #define BR_PORT_BITS    10
  28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
  29
  30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  31
  32 #define BR_VERSION      "2.3"
  33
  34 /* Control of forwarding link local multicast */
  35 #define BR_GROUPFWD_DEFAULT     0
  36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  37 enum {
  38         BR_GROUPFWD_STP         = BIT(0),
  39         BR_GROUPFWD_MACPAUSE    = BIT(1),
  40         BR_GROUPFWD_LACP        = BIT(2),
  41 };
  42
  43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  44                                 BR_GROUPFWD_LACP)
  45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  46 #define BR_GROUPFWD_8021AD      0xB801u
  47
  48 /* Path to usermode spanning tree program */
  49 #define BR_STP_PROG     "/sbin/bridge-stp"
  50
  51 typedef struct bridge_id bridge_id;
  52 typedef struct mac_addr mac_addr;
  53 typedef __u16 port_id;
  54
  55 struct bridge_id {
  56         unsigned char   prio[2];
  57         unsigned char   addr[ETH_ALEN];
  58 };
  59
  60 struct mac_addr {
  61         unsigned char   addr[ETH_ALEN];
  62 };
  63
  64 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  65 /* our own querier */
  66 struct bridge_mcast_own_query {
  67         struct timer_list       timer;
  68         u32                     startup_sent;
  69 };
  70
  71 /* other querier */
  72 struct bridge_mcast_other_query {
  73         struct timer_list               timer;
  74         unsigned long                   delay_time;
  75 };
  76
  77 /* selected querier */
  78 struct bridge_mcast_querier {
  79         struct br_ip addr;
  80         struct net_bridge_port __rcu    *port;
  81 };
  82
  83 /* IGMP/MLD statistics */
  84 struct bridge_mcast_stats {
  85         struct br_mcast_stats mstats;
  86         struct u64_stats_sync syncp;
  87 };
  88 #endif
  89
  90 struct br_vlan_stats {
  91         u64 rx_bytes;
  92         u64 rx_packets;
  93         u64 tx_bytes;
  94         u64 tx_packets;
  95         struct u64_stats_sync syncp;
  96 };
  97
  98 struct br_tunnel_info {
  99         __be64                  tunnel_id;
 100         struct metadata_dst     *tunnel_dst;
 101 };
 102
 103 /* private vlan flags */
 104 enum {
 105         BR_VLFLAG_PER_PORT_STATS = BIT(0),
 106         BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 107 };
 108
 109 /**
 110  * struct net_bridge_vlan - per-vlan entry
 111  *
 112  * @vnode: rhashtable member
 113  * @vid: VLAN id
 114  * @flags: bridge vlan flags
 115  * @priv_flags: private (in-kernel) bridge vlan flags
 116  * @stats: per-cpu VLAN statistics
 117  * @br: if MASTER flag set, this points to a bridge struct
 118  * @port: if MASTER flag unset, this points to a port struct
 119  * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 120  * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 121  *          for this VLAN entry
 122  * @vlist: sorted list of VLAN entries
 123  * @rcu: used for entry destruction
 124  *
 125  * This structure is shared between the global per-VLAN entries contained in
 126  * the bridge rhashtable and the local per-port per-VLAN entries contained in
 127  * the port's rhashtable. The union entries should be interpreted depending on
 128  * the entry flags that are set.
 129  */
 130 struct net_bridge_vlan {
 131         struct rhash_head               vnode;
 132         struct rhash_head               tnode;
 133         u16                             vid;
 134         u16                             flags;
 135         u16                             priv_flags;
 136         struct br_vlan_stats __percpu   *stats;
 137         union {
 138                 struct net_bridge       *br;
 139                 struct net_bridge_port  *port;
 140         };
 141         union {
 142                 refcount_t              refcnt;
 143                 struct net_bridge_vlan  *brvlan;
 144         };
 145
 146         struct br_tunnel_info           tinfo;
 147
 148         struct list_head                vlist;
 149
 150         struct rcu_head                 rcu;
 151 };
 152
 153 /**
 154  * struct net_bridge_vlan_group
 155  *
 156  * @vlan_hash: VLAN entry rhashtable
 157  * @vlan_list: sorted VLAN entry list
 158  * @num_vlans: number of total VLAN entries
 159  * @pvid: PVID VLAN id
 160  *
 161  * IMPORTANT: Be careful when checking if there're VLAN entries using list
 162  *            primitives because the bridge can have entries in its list which
 163  *            are just for global context but not for filtering, i.e. they have
 164  *            the master flag set but not the brentry flag. If you have to check
 165  *            if there're "real" entries in the bridge please test @num_vlans
 166  */
 167 struct net_bridge_vlan_group {
 168         struct rhashtable               vlan_hash;
 169         struct rhashtable               tunnel_hash;
 170         struct list_head                vlan_list;
 171         u16                             num_vlans;
 172         u16                             pvid;
 173 };
 174
 175 struct net_bridge_fdb_key {
 176         mac_addr addr;
 177         u16 vlan_id;
 178 };
 179
 180 struct net_bridge_fdb_entry {
 181         struct rhash_head               rhnode;
 182         struct net_bridge_port          *dst;
 183
 184         struct net_bridge_fdb_key       key;
 185         struct hlist_node               fdb_node;
 186         unsigned char                   is_local:1,
 187                                         is_static:1,
 188                                         is_sticky:1,
 189                                         added_by_user:1,
 190                                         added_by_external_learn:1,
 191                                         offloaded:1;
 192
 193         /* write-heavy members should not affect lookups */
 194         unsigned long                   updated ____cacheline_aligned_in_smp;
 195         unsigned long                   used;
 196
 197         struct rcu_head                 rcu;
 198 };
 199
 200 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 201 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 202
 203 struct net_bridge_port_group {
 204         struct net_bridge_port          *port;
 205         struct net_bridge_port_group __rcu *next;
 206         struct hlist_node               mglist;
 207         struct rcu_head                 rcu;
 208         struct timer_list               timer;
 209         struct br_ip                    addr;
 210         unsigned char                   flags;
 211         unsigned char                   eth_addr[ETH_ALEN];
 212 };
 213
 214 struct net_bridge_mdb_entry {
 215         struct rhash_head               rhnode;
 216         struct net_bridge               *br;
 217         struct net_bridge_port_group __rcu *ports;
 218         struct rcu_head                 rcu;
 219         struct timer_list               timer;
 220         struct br_ip                    addr;
 221         bool                            host_joined;
 222         struct hlist_node               mdb_node;
 223 };
 224
 225 struct net_bridge_port {
 226         struct net_bridge               *br;
 227         struct net_device               *dev;
 228         struct list_head                list;
 229
 230         unsigned long                   flags;
 231 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 232         struct net_bridge_vlan_group    __rcu *vlgrp;
 233 #endif
 234         struct net_bridge_port          __rcu *backup_port;
 235
 236         /* STP */
 237         u8                              priority;
 238         u8                              state;
 239         u16                             port_no;
 240         unsigned char                   topology_change_ack;
 241         unsigned char                   config_pending;
 242         port_id                         port_id;
 243         port_id                         designated_port;
 244         bridge_id                       designated_root;
 245         bridge_id                       designated_bridge;
 246         u32                             path_cost;
 247         u32                             designated_cost;
 248         unsigned long                   designated_age;
 249
 250         struct timer_list               forward_delay_timer;
 251         struct timer_list               hold_timer;
 252         struct timer_list               message_age_timer;
 253         struct kobject                  kobj;
 254         struct rcu_head                 rcu;
 255
 256 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 257         struct bridge_mcast_own_query   ip4_own_query;
 258 #if IS_ENABLED(CONFIG_IPV6)
 259         struct bridge_mcast_own_query   ip6_own_query;
 260 #endif /* IS_ENABLED(CONFIG_IPV6) */
 261         unsigned char                   multicast_router;
 262         struct bridge_mcast_stats       __percpu *mcast_stats;
 263         struct timer_list               multicast_router_timer;
 264         struct hlist_head               mglist;
 265         struct hlist_node               rlist;
 266 #endif
 267
 268 #ifdef CONFIG_SYSFS
 269         char                            sysfs_name[IFNAMSIZ];
 270 #endif
 271
 272 #ifdef CONFIG_NET_POLL_CONTROLLER
 273         struct netpoll                  *np;
 274 #endif
 275 #ifdef CONFIG_NET_SWITCHDEV
 276         int                             offload_fwd_mark;
 277 #endif
 278         u16                             group_fwd_mask;
 279         u16                             backup_redirected_cnt;
 280 };
 281
 282 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 283
 284 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 285 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 286
 287 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 288 {
 289         return rcu_dereference(dev->rx_handler_data);
 290 }
 291
 292 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 293 {
 294         return netif_is_bridge_port(dev) ?
 295                 rtnl_dereference(dev->rx_handler_data) : NULL;
 296 }
 297
 298 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 299 {
 300         return netif_is_bridge_port(dev) ?
 301                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 302 }
 303
 304 enum net_bridge_opts {
 305         BROPT_VLAN_ENABLED,
 306         BROPT_VLAN_STATS_ENABLED,
 307         BROPT_NF_CALL_IPTABLES,
 308         BROPT_NF_CALL_IP6TABLES,
 309         BROPT_NF_CALL_ARPTABLES,
 310         BROPT_GROUP_ADDR_SET,
 311         BROPT_MULTICAST_ENABLED,
 312         BROPT_MULTICAST_QUERIER,
 313         BROPT_MULTICAST_QUERY_USE_IFADDR,
 314         BROPT_MULTICAST_STATS_ENABLED,
 315         BROPT_HAS_IPV6_ADDR,
 316         BROPT_NEIGH_SUPPRESS_ENABLED,
 317         BROPT_MTU_SET_BY_USER,
 318         BROPT_VLAN_STATS_PER_PORT,
 319         BROPT_NO_LL_LEARN,
 320         BROPT_VLAN_BRIDGE_BINDING,
 321 };
 322
 323 struct net_bridge {
 324         spinlock_t                      lock;
 325         spinlock_t                      hash_lock;
 326         struct list_head                port_list;
 327         struct net_device               *dev;
 328         struct pcpu_sw_netstats         __percpu *stats;
 329         unsigned long                   options;
 330         /* These fields are accessed on each packet */
 331 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 332         __be16                          vlan_proto;
 333         u16                             default_pvid;
 334         struct net_bridge_vlan_group    __rcu *vlgrp;
 335 #endif
 336
 337         struct rhashtable               fdb_hash_tbl;
 338 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 339         union {
 340                 struct rtable           fake_rtable;
 341                 struct rt6_info         fake_rt6_info;
 342         };
 343 #endif
 344         u16                             group_fwd_mask;
 345         u16                             group_fwd_mask_required;
 346
 347         /* STP */
 348         bridge_id                       designated_root;
 349         bridge_id                       bridge_id;
 350         unsigned char                   topology_change;
 351         unsigned char                   topology_change_detected;
 352         u16                             root_port;
 353         unsigned long                   max_age;
 354         unsigned long                   hello_time;
 355         unsigned long                   forward_delay;
 356         unsigned long                   ageing_time;
 357         unsigned long                   bridge_max_age;
 358         unsigned long                   bridge_hello_time;
 359         unsigned long                   bridge_forward_delay;
 360         unsigned long                   bridge_ageing_time;
 361         u32                             root_path_cost;
 362
 363         u8                              group_addr[ETH_ALEN];
 364
 365         enum {
 366                 BR_NO_STP,              /* no spanning tree */
 367                 BR_KERNEL_STP,          /* old STP in kernel */
 368                 BR_USER_STP,            /* new RSTP in userspace */
 369         } stp_enabled;
 370
 371 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 372
 373         u32                             hash_max;
 374
 375         u32                             multicast_last_member_count;
 376         u32                             multicast_startup_query_count;
 377
 378         u8                              multicast_igmp_version;
 379         u8                              multicast_router;
 380 #if IS_ENABLED(CONFIG_IPV6)
 381         u8                              multicast_mld_version;
 382 #endif
 383         spinlock_t                      multicast_lock;
 384         unsigned long                   multicast_last_member_interval;
 385         unsigned long                   multicast_membership_interval;
 386         unsigned long                   multicast_querier_interval;
 387         unsigned long                   multicast_query_interval;
 388         unsigned long                   multicast_query_response_interval;
 389         unsigned long                   multicast_startup_query_interval;
 390
 391         struct rhashtable               mdb_hash_tbl;
 392
 393         struct hlist_head               mdb_list;
 394         struct hlist_head               router_list;
 395
 396         struct timer_list               multicast_router_timer;
 397         struct bridge_mcast_other_query ip4_other_query;
 398         struct bridge_mcast_own_query   ip4_own_query;
 399         struct bridge_mcast_querier     ip4_querier;
 400         struct bridge_mcast_stats       __percpu *mcast_stats;
 401 #if IS_ENABLED(CONFIG_IPV6)
 402         struct bridge_mcast_other_query ip6_other_query;
 403         struct bridge_mcast_own_query   ip6_own_query;
 404         struct bridge_mcast_querier     ip6_querier;
 405 #endif /* IS_ENABLED(CONFIG_IPV6) */
 406 #endif
 407
 408         struct timer_list               hello_timer;
 409         struct timer_list               tcn_timer;
 410         struct timer_list               topology_change_timer;
 411         struct delayed_work             gc_work;
 412         struct kobject                  *ifobj;
 413         u32                             auto_cnt;
 414
 415 #ifdef CONFIG_NET_SWITCHDEV
 416         int offload_fwd_mark;
 417 #endif
 418         struct hlist_head               fdb_list;
 419 };
 420
 421 struct br_input_skb_cb {
 422         struct net_device *brdev;
 423
 424 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 425         u8 igmp;
 426         u8 mrouters_only:1;
 427 #endif
 428         u8 proxyarp_replied:1;
 429         u8 src_port_isolated:1;
 430 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 431         u8 vlan_filtered:1;
 432 #endif
 433 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 434         u8 br_netfilter_broute:1;
 435 #endif
 436
 437 #ifdef CONFIG_NET_SWITCHDEV
 438         int offload_fwd_mark;
 439 #endif
 440 };
 441
 442 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 443
 444 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 445 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 446 #else
 447 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 448 #endif
 449
 450 #define br_printk(level, br, format, args...)   \
 451         printk(level "%s: " format, (br)->dev->name, ##args)
 452
 453 #define br_err(__br, format, args...)                   \
 454         br_printk(KERN_ERR, __br, format, ##args)
 455 #define br_warn(__br, format, args...)                  \
 456         br_printk(KERN_WARNING, __br, format, ##args)
 457 #define br_notice(__br, format, args...)                \
 458         br_printk(KERN_NOTICE, __br, format, ##args)
 459 #define br_info(__br, format, args...)                  \
 460         br_printk(KERN_INFO, __br, format, ##args)
 461
 462 #define br_debug(br, format, args...)                   \
 463         pr_debug("%s: " format,  (br)->dev->name, ##args)
 464
 465 /* called under bridge lock */
 466 static inline int br_is_root_bridge(const struct net_bridge *br)
 467 {
 468         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 469 }
 470
 471 /* check if a VLAN entry is global */
 472 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 473 {
 474         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 475 }
 476
 477 /* check if a VLAN entry is used by the bridge */
 478 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 479 {
 480         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 481 }
 482
 483 /* check if we should use the vlan entry, returns false if it's only context */
 484 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 485 {
 486         if (br_vlan_is_master(v)) {
 487                 if (br_vlan_is_brentry(v))
 488                         return true;
 489                 else
 490                         return false;
 491         }
 492
 493         return true;
 494 }
 495
 496 static inline int br_opt_get(const struct net_bridge *br,
 497                              enum net_bridge_opts opt)
 498 {
 499         return test_bit(opt, &br->options);
 500 }
 501
 502 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 503                       struct netlink_ext_ack *extack);
 504 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 505 int br_boolopt_multi_toggle(struct net_bridge *br,
 506                             struct br_boolopt_multi *bm,
 507                             struct netlink_ext_ack *extack);
 508 void br_boolopt_multi_get(const struct net_bridge *br,
 509                           struct br_boolopt_multi *bm);
 510 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 511
 512 /* br_device.c */
 513 void br_dev_setup(struct net_device *dev);
 514 void br_dev_delete(struct net_device *dev, struct list_head *list);
 515 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 516 #ifdef CONFIG_NET_POLL_CONTROLLER
 517 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 518                                        struct sk_buff *skb)
 519 {
 520         struct netpoll *np = p->np;
 521
 522         if (np)
 523                 netpoll_send_skb(np, skb);
 524 }
 525
 526 int br_netpoll_enable(struct net_bridge_port *p);
 527 void br_netpoll_disable(struct net_bridge_port *p);
 528 #else
 529 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 530                                        struct sk_buff *skb)
 531 {
 532 }
 533
 534 static inline int br_netpoll_enable(struct net_bridge_port *p)
 535 {
 536         return 0;
 537 }
 538
 539 static inline void br_netpoll_disable(struct net_bridge_port *p)
 540 {
 541 }
 542 #endif
 543
 544 /* br_fdb.c */
 545 int br_fdb_init(void);
 546 void br_fdb_fini(void);
 547 int br_fdb_hash_init(struct net_bridge *br);
 548 void br_fdb_hash_fini(struct net_bridge *br);
 549 void br_fdb_flush(struct net_bridge *br);
 550 void br_fdb_find_delete_local(struct net_bridge *br,
 551                               const struct net_bridge_port *p,
 552                               const unsigned char *addr, u16 vid);
 553 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 554 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 555 void br_fdb_cleanup(struct work_struct *work);
 556 void br_fdb_delete_by_port(struct net_bridge *br,
 557                            const struct net_bridge_port *p, u16 vid, int do_all);
 558 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 559                                              const unsigned char *addr,
 560                                              __u16 vid);
 561 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 562 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 563                    unsigned long off);
 564 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 565                   const unsigned char *addr, u16 vid);
 566 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 567                    const unsigned char *addr, u16 vid, bool added_by_user);
 568
 569 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 570                   struct net_device *dev, const unsigned char *addr, u16 vid);
 571 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 572                const unsigned char *addr, u16 vid, u16 nlh_flags,
 573                struct netlink_ext_ack *extack);
 574 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 575                 struct net_device *dev, struct net_device *fdev, int *idx);
 576 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 577                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 578                struct netlink_ext_ack *extack);
 579 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 580 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 581 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 582                               const unsigned char *addr, u16 vid,
 583                               bool swdev_notify);
 584 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 585                               const unsigned char *addr, u16 vid,
 586                               bool swdev_notify);
 587 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 588                           const unsigned char *addr, u16 vid, bool offloaded);
 589
 590 /* br_forward.c */
 591 enum br_pkt_type {
 592         BR_PKT_UNICAST,
 593         BR_PKT_MULTICAST,
 594         BR_PKT_BROADCAST
 595 };
 596 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 597 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 598                 bool local_rcv, bool local_orig);
 599 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 600 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 601               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 602
 603 /* return true if both source port and dest port are isolated */
 604 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 605                                    const struct sk_buff *skb)
 606 {
 607         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 608                (to->flags & BR_ISOLATED);
 609 }
 610
 611 /* br_if.c */
 612 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 613 int br_add_bridge(struct net *net, const char *name);
 614 int br_del_bridge(struct net *net, const char *name);
 615 int br_add_if(struct net_bridge *br, struct net_device *dev,
 616               struct netlink_ext_ack *extack);
 617 int br_del_if(struct net_bridge *br, struct net_device *dev);
 618 void br_mtu_auto_adjust(struct net_bridge *br);
 619 netdev_features_t br_features_recompute(struct net_bridge *br,
 620                                         netdev_features_t features);
 621 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 622 void br_manage_promisc(struct net_bridge *br);
 623 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 624
 625 /* br_input.c */
 626 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 627 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 628
 629 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 630 {
 631         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 632 }
 633
 634 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 635 {
 636         return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
 637 }
 638
 639 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 640 {
 641         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 642 }
 643
 644 static inline struct net_bridge_port *
 645 br_port_get_check_rtnl(const struct net_device *dev)
 646 {
 647         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 648 }
 649
 650 /* br_ioctl.c */
 651 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 652 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 653                              void __user *arg);
 654
 655 /* br_multicast.c */
 656 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 657 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 658                      struct sk_buff *skb, u16 vid);
 659 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 660                                         struct sk_buff *skb, u16 vid);
 661 int br_multicast_add_port(struct net_bridge_port *port);
 662 void br_multicast_del_port(struct net_bridge_port *port);
 663 void br_multicast_enable_port(struct net_bridge_port *port);
 664 void br_multicast_disable_port(struct net_bridge_port *port);
 665 void br_multicast_init(struct net_bridge *br);
 666 void br_multicast_open(struct net_bridge *br);
 667 void br_multicast_stop(struct net_bridge *br);
 668 void br_multicast_dev_del(struct net_bridge *br);
 669 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 670                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 671 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 672 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 673 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 674 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 675 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 676 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 677 #if IS_ENABLED(CONFIG_IPV6)
 678 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 679 #endif
 680 struct net_bridge_mdb_entry *
 681 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 682 struct net_bridge_mdb_entry *
 683 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 684 struct net_bridge_port_group *
 685 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 686                             struct net_bridge_port_group __rcu *next,
 687                             unsigned char flags, const unsigned char *src);
 688 int br_mdb_hash_init(struct net_bridge *br);
 689 void br_mdb_hash_fini(struct net_bridge *br);
 690 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 691                    struct br_ip *group, int type, u8 flags);
 692 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 693                    int type);
 694 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 695                         const struct sk_buff *skb, u8 type, u8 dir);
 696 int br_multicast_init_stats(struct net_bridge *br);
 697 void br_multicast_uninit_stats(struct net_bridge *br);
 698 void br_multicast_get_stats(const struct net_bridge *br,
 699                             const struct net_bridge_port *p,
 700                             struct br_mcast_stats *dest);
 701 void br_mdb_init(void);
 702 void br_mdb_uninit(void);
 703
 704 #define mlock_dereference(X, br) \
 705         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 706
 707 static inline bool br_multicast_is_router(struct net_bridge *br)
 708 {
 709         return br->multicast_router == 2 ||
 710                (br->multicast_router == 1 &&
 711                 timer_pending(&br->multicast_router_timer));
 712 }
 713
 714 static inline bool
 715 __br_multicast_querier_exists(struct net_bridge *br,
 716                                 struct bridge_mcast_other_query *querier,
 717                                 const bool is_ipv6)
 718 {
 719         bool own_querier_enabled;
 720
 721         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 722                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 723                         own_querier_enabled = false;
 724                 else
 725                         own_querier_enabled = true;
 726         } else {
 727                 own_querier_enabled = false;
 728         }
 729
 730         return time_is_before_jiffies(querier->delay_time) &&
 731                (own_querier_enabled || timer_pending(&querier->timer));
 732 }
 733
 734 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 735                                                struct ethhdr *eth)
 736 {
 737         switch (eth->h_proto) {
 738         case (htons(ETH_P_IP)):
 739                 return __br_multicast_querier_exists(br,
 740                         &br->ip4_other_query, false);
 741 #if IS_ENABLED(CONFIG_IPV6)
 742         case (htons(ETH_P_IPV6)):
 743                 return __br_multicast_querier_exists(br,
 744                         &br->ip6_other_query, true);
 745 #endif
 746         default:
 747                 return false;
 748         }
 749 }
 750
 751 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 752 {
 753         return BR_INPUT_SKB_CB(skb)->igmp;
 754 }
 755 #else
 756 static inline int br_multicast_rcv(struct net_bridge *br,
 757                                    struct net_bridge_port *port,
 758                                    struct sk_buff *skb,
 759                                    u16 vid)
 760 {
 761         return 0;
 762 }
 763
 764 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 765                                                       struct sk_buff *skb, u16 vid)
 766 {
 767         return NULL;
 768 }
 769
 770 static inline int br_multicast_add_port(struct net_bridge_port *port)
 771 {
 772         return 0;
 773 }
 774
 775 static inline void br_multicast_del_port(struct net_bridge_port *port)
 776 {
 777 }
 778
 779 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 780 {
 781 }
 782
 783 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 784 {
 785 }
 786
 787 static inline void br_multicast_init(struct net_bridge *br)
 788 {
 789 }
 790
 791 static inline void br_multicast_open(struct net_bridge *br)
 792 {
 793 }
 794
 795 static inline void br_multicast_stop(struct net_bridge *br)
 796 {
 797 }
 798
 799 static inline void br_multicast_dev_del(struct net_bridge *br)
 800 {
 801 }
 802
 803 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 804                                       struct sk_buff *skb,
 805                                       bool local_rcv, bool local_orig)
 806 {
 807 }
 808
 809 static inline bool br_multicast_is_router(struct net_bridge *br)
 810 {
 811         return false;
 812 }
 813
 814 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 815                                                struct ethhdr *eth)
 816 {
 817         return false;
 818 }
 819
 820 static inline void br_mdb_init(void)
 821 {
 822 }
 823
 824 static inline void br_mdb_uninit(void)
 825 {
 826 }
 827
 828 static inline int br_mdb_hash_init(struct net_bridge *br)
 829 {
 830         return 0;
 831 }
 832
 833 static inline void br_mdb_hash_fini(struct net_bridge *br)
 834 {
 835 }
 836
 837 static inline void br_multicast_count(struct net_bridge *br,
 838                                       const struct net_bridge_port *p,
 839                                       const struct sk_buff *skb,
 840                                       u8 type, u8 dir)
 841 {
 842 }
 843
 844 static inline int br_multicast_init_stats(struct net_bridge *br)
 845 {
 846         return 0;
 847 }
 848
 849 static inline void br_multicast_uninit_stats(struct net_bridge *br)
 850 {
 851 }
 852
 853 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 854 {
 855         return 0;
 856 }
 857 #endif
 858
 859 /* br_vlan.c */
 860 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 861 bool br_allowed_ingress(const struct net_bridge *br,
 862                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 863                         u16 *vid);
 864 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 865                        const struct sk_buff *skb);
 866 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 867 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 868                                const struct net_bridge_port *port,
 869                                struct net_bridge_vlan_group *vg,
 870                                struct sk_buff *skb);
 871 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 872                 bool *changed, struct netlink_ext_ack *extack);
 873 int br_vlan_delete(struct net_bridge *br, u16 vid);
 874 void br_vlan_flush(struct net_bridge *br);
 875 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 876 void br_recalculate_fwd_mask(struct net_bridge *br);
 877 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 878 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 879 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
 880 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 881 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
 882 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
 883 int br_vlan_init(struct net_bridge *br);
 884 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
 885 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 886                                struct netlink_ext_ack *extack);
 887 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 888                  bool *changed, struct netlink_ext_ack *extack);
 889 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 890 void nbp_vlan_flush(struct net_bridge_port *port);
 891 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
 892 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 893 void br_vlan_get_stats(const struct net_bridge_vlan *v,
 894                        struct br_vlan_stats *stats);
 895 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
 896 void br_vlan_bridge_event(struct net_device *dev, unsigned long event,
 897                           void *ptr);
 898
 899 static inline struct net_bridge_vlan_group *br_vlan_group(
 900                                         const struct net_bridge *br)
 901 {
 902         return rtnl_dereference(br->vlgrp);
 903 }
 904
 905 static inline struct net_bridge_vlan_group *nbp_vlan_group(
 906                                         const struct net_bridge_port *p)
 907 {
 908         return rtnl_dereference(p->vlgrp);
 909 }
 910
 911 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
 912                                         const struct net_bridge *br)
 913 {
 914         return rcu_dereference(br->vlgrp);
 915 }
 916
 917 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
 918                                         const struct net_bridge_port *p)
 919 {
 920         return rcu_dereference(p->vlgrp);
 921 }
 922
 923 /* Since bridge now depends on 8021Q module, but the time bridge sees the
 924  * skb, the vlan tag will always be present if the frame was tagged.
 925  */
 926 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
 927 {
 928         int err = 0;
 929
 930         if (skb_vlan_tag_present(skb)) {
 931                 *vid = skb_vlan_tag_get_id(skb);
 932         } else {
 933                 *vid = 0;
 934                 err = -EINVAL;
 935         }
 936
 937         return err;
 938 }
 939
 940 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
 941 {
 942         if (!vg)
 943                 return 0;
 944
 945         smp_rmb();
 946         return vg->pvid;
 947 }
 948
 949 #else
 950 static inline bool br_allowed_ingress(const struct net_bridge *br,
 951                                       struct net_bridge_vlan_group *vg,
 952                                       struct sk_buff *skb,
 953                                       u16 *vid)
 954 {
 955         return true;
 956 }
 957
 958 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 959                                      const struct sk_buff *skb)
 960 {
 961         return true;
 962 }
 963
 964 static inline bool br_should_learn(struct net_bridge_port *p,
 965                                    struct sk_buff *skb, u16 *vid)
 966 {
 967         return true;
 968 }
 969
 970 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
 971                                              const struct net_bridge_port *port,
 972                                              struct net_bridge_vlan_group *vg,
 973                                              struct sk_buff *skb)
 974 {
 975         return skb;
 976 }
 977
 978 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 979                               bool *changed, struct netlink_ext_ack *extack)
 980 {
 981         *changed = false;
 982         return -EOPNOTSUPP;
 983 }
 984
 985 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
 986 {
 987         return -EOPNOTSUPP;
 988 }
 989
 990 static inline void br_vlan_flush(struct net_bridge *br)
 991 {
 992 }
 993
 994 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
 995 {
 996 }
 997
 998 static inline int br_vlan_init(struct net_bridge *br)
 999 {
1000         return 0;
1001 }
1002
1003 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1004                                bool *changed, struct netlink_ext_ack *extack)
1005 {
1006         *changed = false;
1007         return -EOPNOTSUPP;
1008 }
1009
1010 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1011 {
1012         return -EOPNOTSUPP;
1013 }
1014
1015 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1016 {
1017 }
1018
1019 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1020                                                    u16 vid)
1021 {
1022         return NULL;
1023 }
1024
1025 static inline int nbp_vlan_init(struct net_bridge_port *port,
1026                                 struct netlink_ext_ack *extack)
1027 {
1028         return 0;
1029 }
1030
1031 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1032 {
1033         return 0;
1034 }
1035
1036 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1037 {
1038         return 0;
1039 }
1040
1041 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1042                                           unsigned long val)
1043 {
1044         return -EOPNOTSUPP;
1045 }
1046
1047 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1048                                          u32 filter_mask)
1049 {
1050         return 0;
1051 }
1052
1053 static inline struct net_bridge_vlan_group *br_vlan_group(
1054                                         const struct net_bridge *br)
1055 {
1056         return NULL;
1057 }
1058
1059 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1060                                         const struct net_bridge_port *p)
1061 {
1062         return NULL;
1063 }
1064
1065 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1066                                         const struct net_bridge *br)
1067 {
1068         return NULL;
1069 }
1070
1071 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1072                                         const struct net_bridge_port *p)
1073 {
1074         return NULL;
1075 }
1076
1077 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1078                                      struct br_vlan_stats *stats)
1079 {
1080 }
1081
1082 static inline void br_vlan_port_event(struct net_bridge_port *p,
1083                                       unsigned long event)
1084 {
1085 }
1086
1087 static inline void br_vlan_bridge_event(struct net_device *dev,
1088                                         unsigned long event, void *ptr)
1089 {
1090 }
1091 #endif
1092
1093 struct nf_br_ops {
1094         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1095 };
1096 extern const struct nf_br_ops __rcu *nf_br_ops;
1097
1098 /* br_netfilter.c */
1099 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1100 int br_nf_core_init(void);
1101 void br_nf_core_fini(void);
1102 void br_netfilter_rtable_init(struct net_bridge *);
1103 #else
1104 static inline int br_nf_core_init(void) { return 0; }
1105 static inline void br_nf_core_fini(void) {}
1106 #define br_netfilter_rtable_init(x)
1107 #endif
1108
1109 /* br_stp.c */
1110 void br_set_state(struct net_bridge_port *p, unsigned int state);
1111 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1112 void br_init_port(struct net_bridge_port *p);
1113 void br_become_designated_port(struct net_bridge_port *p);
1114
1115 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1116 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1117 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1118 int br_set_max_age(struct net_bridge *br, unsigned long x);
1119 int __set_ageing_time(struct net_device *dev, unsigned long t);
1120 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1121
1122
1123 /* br_stp_if.c */
1124 void br_stp_enable_bridge(struct net_bridge *br);
1125 void br_stp_disable_bridge(struct net_bridge *br);
1126 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1127 void br_stp_enable_port(struct net_bridge_port *p);
1128 void br_stp_disable_port(struct net_bridge_port *p);
1129 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1130 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1131 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1132 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1133 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1134 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1135
1136 /* br_stp_bpdu.c */
1137 struct stp_proto;
1138 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1139                 struct net_device *dev);
1140
1141 /* br_stp_timer.c */
1142 void br_stp_timer_init(struct net_bridge *br);
1143 void br_stp_port_timer_init(struct net_bridge_port *p);
1144 unsigned long br_timer_value(const struct timer_list *timer);
1145
1146 /* br.c */
1147 #if IS_ENABLED(CONFIG_ATM_LANE)
1148 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1149 #endif
1150
1151 /* br_netlink.c */
1152 extern struct rtnl_link_ops br_link_ops;
1153 int br_netlink_init(void);
1154 void br_netlink_fini(void);
1155 void br_ifinfo_notify(int event, const struct net_bridge *br,
1156                       const struct net_bridge_port *port);
1157 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1158                struct netlink_ext_ack *extack);
1159 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1160 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1161                u32 filter_mask, int nlflags);
1162
1163 #ifdef CONFIG_SYSFS
1164 /* br_sysfs_if.c */
1165 extern const struct sysfs_ops brport_sysfs_ops;
1166 int br_sysfs_addif(struct net_bridge_port *p);
1167 int br_sysfs_renameif(struct net_bridge_port *p);
1168
1169 /* br_sysfs_br.c */
1170 int br_sysfs_addbr(struct net_device *dev);
1171 void br_sysfs_delbr(struct net_device *dev);
1172
1173 #else
1174
1175 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1176 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1177 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1178 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1179 #endif /* CONFIG_SYSFS */
1180
1181 /* br_switchdev.c */
1182 #ifdef CONFIG_NET_SWITCHDEV
1183 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1184 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1185                               struct sk_buff *skb);
1186 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1187                                   const struct sk_buff *skb);
1188 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1189                                unsigned long flags,
1190                                unsigned long mask);
1191 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1192                              int type);
1193 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1194                                struct netlink_ext_ack *extack);
1195 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1196
1197 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1198 {
1199         skb->offload_fwd_mark = 0;
1200 }
1201 #else
1202 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1203 {
1204         return 0;
1205 }
1206
1207 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1208                                             struct sk_buff *skb)
1209 {
1210 }
1211
1212 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1213                                                 const struct sk_buff *skb)
1214 {
1215         return true;
1216 }
1217
1218 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1219                                              unsigned long flags,
1220                                              unsigned long mask)
1221 {
1222         return 0;
1223 }
1224
1225 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1226                                              u16 vid, u16 flags,
1227                                              struct netlink_ext_ack *extack)
1228 {
1229         return -EOPNOTSUPP;
1230 }
1231
1232 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1233 {
1234         return -EOPNOTSUPP;
1235 }
1236
1237 static inline void
1238 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1239 {
1240 }
1241
1242 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1243 {
1244 }
1245 #endif /* CONFIG_NET_SWITCHDEV */
1246
1247 /* br_arp_nd_proxy.c */
1248 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1249 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1250                               u16 vid, struct net_bridge_port *p);
1251 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1252                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1253 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1254 #endif