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 /* bridge fdb flags */
 176 enum {
 177         BR_FDB_LOCAL,
 178         BR_FDB_STATIC,
 179         BR_FDB_STICKY,
 180         BR_FDB_ADDED_BY_USER,
 181         BR_FDB_ADDED_BY_EXT_LEARN,
 182         BR_FDB_OFFLOADED,
 183 };
 184
 185 struct net_bridge_fdb_key {
 186         mac_addr addr;
 187         u16 vlan_id;
 188 };
 189
 190 struct net_bridge_fdb_entry {
 191         struct rhash_head               rhnode;
 192         struct net_bridge_port          *dst;
 193
 194         struct net_bridge_fdb_key       key;
 195         struct hlist_node               fdb_node;
 196         unsigned long                   flags;
 197
 198         /* write-heavy members should not affect lookups */
 199         unsigned long                   updated ____cacheline_aligned_in_smp;
 200         unsigned long                   used;
 201
 202         struct rcu_head                 rcu;
 203 };
 204
 205 #define MDB_PG_FLAGS_PERMANENT  BIT(0)
 206 #define MDB_PG_FLAGS_OFFLOAD    BIT(1)
 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
 208
 209 struct net_bridge_port_group {
 210         struct net_bridge_port          *port;
 211         struct net_bridge_port_group __rcu *next;
 212         struct hlist_node               mglist;
 213         struct rcu_head                 rcu;
 214         struct timer_list               timer;
 215         struct br_ip                    addr;
 216         unsigned char                   flags;
 217         unsigned char                   eth_addr[ETH_ALEN];
 218 };
 219
 220 struct net_bridge_mdb_entry {
 221         struct rhash_head               rhnode;
 222         struct net_bridge               *br;
 223         struct net_bridge_port_group __rcu *ports;
 224         struct rcu_head                 rcu;
 225         struct timer_list               timer;
 226         struct br_ip                    addr;
 227         bool                            host_joined;
 228         struct hlist_node               mdb_node;
 229 };
 230
 231 struct net_bridge_port {
 232         struct net_bridge               *br;
 233         struct net_device               *dev;
 234         struct list_head                list;
 235
 236         unsigned long                   flags;
 237 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 238         struct net_bridge_vlan_group    __rcu *vlgrp;
 239 #endif
 240         struct net_bridge_port          __rcu *backup_port;
 241
 242         /* STP */
 243         u8                              priority;
 244         u8                              state;
 245         u16                             port_no;
 246         unsigned char                   topology_change_ack;
 247         unsigned char                   config_pending;
 248         port_id                         port_id;
 249         port_id                         designated_port;
 250         bridge_id                       designated_root;
 251         bridge_id                       designated_bridge;
 252         u32                             path_cost;
 253         u32                             designated_cost;
 254         unsigned long                   designated_age;
 255
 256         struct timer_list               forward_delay_timer;
 257         struct timer_list               hold_timer;
 258         struct timer_list               message_age_timer;
 259         struct kobject                  kobj;
 260         struct rcu_head                 rcu;
 261
 262 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 263         struct bridge_mcast_own_query   ip4_own_query;
 264 #if IS_ENABLED(CONFIG_IPV6)
 265         struct bridge_mcast_own_query   ip6_own_query;
 266 #endif /* IS_ENABLED(CONFIG_IPV6) */
 267         unsigned char                   multicast_router;
 268         struct bridge_mcast_stats       __percpu *mcast_stats;
 269         struct timer_list               multicast_router_timer;
 270         struct hlist_head               mglist;
 271         struct hlist_node               rlist;
 272 #endif
 273
 274 #ifdef CONFIG_SYSFS
 275         char                            sysfs_name[IFNAMSIZ];
 276 #endif
 277
 278 #ifdef CONFIG_NET_POLL_CONTROLLER
 279         struct netpoll                  *np;
 280 #endif
 281 #ifdef CONFIG_NET_SWITCHDEV
 282         int                             offload_fwd_mark;
 283 #endif
 284         u16                             group_fwd_mask;
 285         u16                             backup_redirected_cnt;
 286
 287         struct bridge_stp_xstats        stp_xstats;
 288 };
 289
 290 #define kobj_to_brport(obj)     container_of(obj, struct net_bridge_port, kobj)
 291
 292 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 293 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 294
 295 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 296 {
 297         return rcu_dereference(dev->rx_handler_data);
 298 }
 299
 300 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 301 {
 302         return netif_is_bridge_port(dev) ?
 303                 rtnl_dereference(dev->rx_handler_data) : NULL;
 304 }
 305
 306 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 307 {
 308         return netif_is_bridge_port(dev) ?
 309                 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 310 }
 311
 312 enum net_bridge_opts {
 313         BROPT_VLAN_ENABLED,
 314         BROPT_VLAN_STATS_ENABLED,
 315         BROPT_NF_CALL_IPTABLES,
 316         BROPT_NF_CALL_IP6TABLES,
 317         BROPT_NF_CALL_ARPTABLES,
 318         BROPT_GROUP_ADDR_SET,
 319         BROPT_MULTICAST_ENABLED,
 320         BROPT_MULTICAST_QUERIER,
 321         BROPT_MULTICAST_QUERY_USE_IFADDR,
 322         BROPT_MULTICAST_STATS_ENABLED,
 323         BROPT_HAS_IPV6_ADDR,
 324         BROPT_NEIGH_SUPPRESS_ENABLED,
 325         BROPT_MTU_SET_BY_USER,
 326         BROPT_VLAN_STATS_PER_PORT,
 327         BROPT_NO_LL_LEARN,
 328         BROPT_VLAN_BRIDGE_BINDING,
 329 };
 330
 331 struct net_bridge {
 332         spinlock_t                      lock;
 333         spinlock_t                      hash_lock;
 334         struct list_head                port_list;
 335         struct net_device               *dev;
 336         struct pcpu_sw_netstats         __percpu *stats;
 337         unsigned long                   options;
 338         /* These fields are accessed on each packet */
 339 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 340         __be16                          vlan_proto;
 341         u16                             default_pvid;
 342         struct net_bridge_vlan_group    __rcu *vlgrp;
 343 #endif
 344
 345         struct rhashtable               fdb_hash_tbl;
 346 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 347         union {
 348                 struct rtable           fake_rtable;
 349                 struct rt6_info         fake_rt6_info;
 350         };
 351 #endif
 352         u16                             group_fwd_mask;
 353         u16                             group_fwd_mask_required;
 354
 355         /* STP */
 356         bridge_id                       designated_root;
 357         bridge_id                       bridge_id;
 358         unsigned char                   topology_change;
 359         unsigned char                   topology_change_detected;
 360         u16                             root_port;
 361         unsigned long                   max_age;
 362         unsigned long                   hello_time;
 363         unsigned long                   forward_delay;
 364         unsigned long                   ageing_time;
 365         unsigned long                   bridge_max_age;
 366         unsigned long                   bridge_hello_time;
 367         unsigned long                   bridge_forward_delay;
 368         unsigned long                   bridge_ageing_time;
 369         u32                             root_path_cost;
 370
 371         u8                              group_addr[ETH_ALEN];
 372
 373         enum {
 374                 BR_NO_STP,              /* no spanning tree */
 375                 BR_KERNEL_STP,          /* old STP in kernel */
 376                 BR_USER_STP,            /* new RSTP in userspace */
 377         } stp_enabled;
 378
 379 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 380
 381         u32                             hash_max;
 382
 383         u32                             multicast_last_member_count;
 384         u32                             multicast_startup_query_count;
 385
 386         u8                              multicast_igmp_version;
 387         u8                              multicast_router;
 388 #if IS_ENABLED(CONFIG_IPV6)
 389         u8                              multicast_mld_version;
 390 #endif
 391         spinlock_t                      multicast_lock;
 392         unsigned long                   multicast_last_member_interval;
 393         unsigned long                   multicast_membership_interval;
 394         unsigned long                   multicast_querier_interval;
 395         unsigned long                   multicast_query_interval;
 396         unsigned long                   multicast_query_response_interval;
 397         unsigned long                   multicast_startup_query_interval;
 398
 399         struct rhashtable               mdb_hash_tbl;
 400
 401         struct hlist_head               mdb_list;
 402         struct hlist_head               router_list;
 403
 404         struct timer_list               multicast_router_timer;
 405         struct bridge_mcast_other_query ip4_other_query;
 406         struct bridge_mcast_own_query   ip4_own_query;
 407         struct bridge_mcast_querier     ip4_querier;
 408         struct bridge_mcast_stats       __percpu *mcast_stats;
 409 #if IS_ENABLED(CONFIG_IPV6)
 410         struct bridge_mcast_other_query ip6_other_query;
 411         struct bridge_mcast_own_query   ip6_own_query;
 412         struct bridge_mcast_querier     ip6_querier;
 413 #endif /* IS_ENABLED(CONFIG_IPV6) */
 414 #endif
 415
 416         struct timer_list               hello_timer;
 417         struct timer_list               tcn_timer;
 418         struct timer_list               topology_change_timer;
 419         struct delayed_work             gc_work;
 420         struct kobject                  *ifobj;
 421         u32                             auto_cnt;
 422
 423 #ifdef CONFIG_NET_SWITCHDEV
 424         int offload_fwd_mark;
 425 #endif
 426         struct hlist_head               fdb_list;
 427 };
 428
 429 struct br_input_skb_cb {
 430         struct net_device *brdev;
 431
 432         u16 frag_max_size;
 433 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 434         u8 igmp;
 435         u8 mrouters_only:1;
 436 #endif
 437         u8 proxyarp_replied:1;
 438         u8 src_port_isolated:1;
 439 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 440         u8 vlan_filtered:1;
 441 #endif
 442 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 443         u8 br_netfilter_broute:1;
 444 #endif
 445
 446 #ifdef CONFIG_NET_SWITCHDEV
 447         int offload_fwd_mark;
 448 #endif
 449 };
 450
 451 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
 452
 453 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 454 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
 455 #else
 456 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
 457 #endif
 458
 459 #define br_printk(level, br, format, args...)   \
 460         printk(level "%s: " format, (br)->dev->name, ##args)
 461
 462 #define br_err(__br, format, args...)                   \
 463         br_printk(KERN_ERR, __br, format, ##args)
 464 #define br_warn(__br, format, args...)                  \
 465         br_printk(KERN_WARNING, __br, format, ##args)
 466 #define br_notice(__br, format, args...)                \
 467         br_printk(KERN_NOTICE, __br, format, ##args)
 468 #define br_info(__br, format, args...)                  \
 469         br_printk(KERN_INFO, __br, format, ##args)
 470
 471 #define br_debug(br, format, args...)                   \
 472         pr_debug("%s: " format,  (br)->dev->name, ##args)
 473
 474 /* called under bridge lock */
 475 static inline int br_is_root_bridge(const struct net_bridge *br)
 476 {
 477         return !memcmp(&br->bridge_id, &br->designated_root, 8);
 478 }
 479
 480 /* check if a VLAN entry is global */
 481 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 482 {
 483         return v->flags & BRIDGE_VLAN_INFO_MASTER;
 484 }
 485
 486 /* check if a VLAN entry is used by the bridge */
 487 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 488 {
 489         return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 490 }
 491
 492 /* check if we should use the vlan entry, returns false if it's only context */
 493 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 494 {
 495         if (br_vlan_is_master(v)) {
 496                 if (br_vlan_is_brentry(v))
 497                         return true;
 498                 else
 499                         return false;
 500         }
 501
 502         return true;
 503 }
 504
 505 static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 506 {
 507         return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 508 }
 509
 510 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 511 {
 512         bool ret = vid > 0 && vid < VLAN_VID_MASK;
 513
 514         if (!ret)
 515                 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 516
 517         return ret;
 518 }
 519
 520 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 521                                        const struct bridge_vlan_info *last,
 522                                        struct netlink_ext_ack *extack)
 523 {
 524         /* pvid flag is not allowed in ranges */
 525         if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 526                 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 527                 return false;
 528         }
 529
 530         /* when cur is the range end, check if:
 531          *  - it has range start flag
 532          *  - range ids are invalid (end is equal to or before start)
 533          */
 534         if (last) {
 535                 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 536                         NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 537                         return false;
 538                 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 539                         NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 540                         return false;
 541                 } else if (cur->vid <= last->vid) {
 542                         NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 543                         return false;
 544                 }
 545         }
 546
 547         /* check for required range flags */
 548         if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 549                             BRIDGE_VLAN_INFO_RANGE_END))) {
 550                 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 551                 return false;
 552         }
 553
 554         return true;
 555 }
 556
 557 static inline int br_afspec_cmd_to_rtm(int cmd)
 558 {
 559         switch (cmd) {
 560         case RTM_SETLINK:
 561                 return RTM_NEWVLAN;
 562         case RTM_DELLINK:
 563                 return RTM_DELVLAN;
 564         }
 565
 566         return 0;
 567 }
 568
 569 static inline int br_opt_get(const struct net_bridge *br,
 570                              enum net_bridge_opts opt)
 571 {
 572         return test_bit(opt, &br->options);
 573 }
 574
 575 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 576                       struct netlink_ext_ack *extack);
 577 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 578 int br_boolopt_multi_toggle(struct net_bridge *br,
 579                             struct br_boolopt_multi *bm,
 580                             struct netlink_ext_ack *extack);
 581 void br_boolopt_multi_get(const struct net_bridge *br,
 582                           struct br_boolopt_multi *bm);
 583 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 584
 585 /* br_device.c */
 586 void br_dev_setup(struct net_device *dev);
 587 void br_dev_delete(struct net_device *dev, struct list_head *list);
 588 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 589 #ifdef CONFIG_NET_POLL_CONTROLLER
 590 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 591                                        struct sk_buff *skb)
 592 {
 593         struct netpoll *np = p->np;
 594
 595         if (np)
 596                 netpoll_send_skb(np, skb);
 597 }
 598
 599 int br_netpoll_enable(struct net_bridge_port *p);
 600 void br_netpoll_disable(struct net_bridge_port *p);
 601 #else
 602 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 603                                        struct sk_buff *skb)
 604 {
 605 }
 606
 607 static inline int br_netpoll_enable(struct net_bridge_port *p)
 608 {
 609         return 0;
 610 }
 611
 612 static inline void br_netpoll_disable(struct net_bridge_port *p)
 613 {
 614 }
 615 #endif
 616
 617 /* br_fdb.c */
 618 int br_fdb_init(void);
 619 void br_fdb_fini(void);
 620 int br_fdb_hash_init(struct net_bridge *br);
 621 void br_fdb_hash_fini(struct net_bridge *br);
 622 void br_fdb_flush(struct net_bridge *br);
 623 void br_fdb_find_delete_local(struct net_bridge *br,
 624                               const struct net_bridge_port *p,
 625                               const unsigned char *addr, u16 vid);
 626 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 627 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 628 void br_fdb_cleanup(struct work_struct *work);
 629 void br_fdb_delete_by_port(struct net_bridge *br,
 630                            const struct net_bridge_port *p, u16 vid, int do_all);
 631 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 632                                              const unsigned char *addr,
 633                                              __u16 vid);
 634 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 635 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 636                    unsigned long off);
 637 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
 638                   const unsigned char *addr, u16 vid);
 639 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 640                    const unsigned char *addr, u16 vid, unsigned long flags);
 641
 642 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 643                   struct net_device *dev, const unsigned char *addr, u16 vid);
 644 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 645                const unsigned char *addr, u16 vid, u16 nlh_flags,
 646                struct netlink_ext_ack *extack);
 647 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 648                 struct net_device *dev, struct net_device *fdev, int *idx);
 649 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 650                const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 651                struct netlink_ext_ack *extack);
 652 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 653 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 654 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 655                               const unsigned char *addr, u16 vid,
 656                               bool swdev_notify);
 657 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 658                               const unsigned char *addr, u16 vid,
 659                               bool swdev_notify);
 660 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 661                           const unsigned char *addr, u16 vid, bool offloaded);
 662
 663 /* br_forward.c */
 664 enum br_pkt_type {
 665         BR_PKT_UNICAST,
 666         BR_PKT_MULTICAST,
 667         BR_PKT_BROADCAST
 668 };
 669 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 670 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 671                 bool local_rcv, bool local_orig);
 672 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 673 void br_flood(struct net_bridge *br, struct sk_buff *skb,
 674               enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 675
 676 /* return true if both source port and dest port are isolated */
 677 static inline bool br_skb_isolated(const struct net_bridge_port *to,
 678                                    const struct sk_buff *skb)
 679 {
 680         return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 681                (to->flags & BR_ISOLATED);
 682 }
 683
 684 /* br_if.c */
 685 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 686 int br_add_bridge(struct net *net, const char *name);
 687 int br_del_bridge(struct net *net, const char *name);
 688 int br_add_if(struct net_bridge *br, struct net_device *dev,
 689               struct netlink_ext_ack *extack);
 690 int br_del_if(struct net_bridge *br, struct net_device *dev);
 691 void br_mtu_auto_adjust(struct net_bridge *br);
 692 netdev_features_t br_features_recompute(struct net_bridge *br,
 693                                         netdev_features_t features);
 694 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 695 void br_manage_promisc(struct net_bridge *br);
 696 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 697
 698 /* br_input.c */
 699 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 700 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
 701
 702 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 703 {
 704         return rcu_dereference(dev->rx_handler) == br_handle_frame;
 705 }
 706
 707 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 708 {
 709         return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
 710 }
 711
 712 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 713 {
 714         return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 715 }
 716
 717 static inline struct net_bridge_port *
 718 br_port_get_check_rtnl(const struct net_device *dev)
 719 {
 720         return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 721 }
 722
 723 /* br_ioctl.c */
 724 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 725 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
 726                              void __user *arg);
 727
 728 /* br_multicast.c */
 729 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 730 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
 731                      struct sk_buff *skb, u16 vid);
 732 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 733                                         struct sk_buff *skb, u16 vid);
 734 int br_multicast_add_port(struct net_bridge_port *port);
 735 void br_multicast_del_port(struct net_bridge_port *port);
 736 void br_multicast_enable_port(struct net_bridge_port *port);
 737 void br_multicast_disable_port(struct net_bridge_port *port);
 738 void br_multicast_init(struct net_bridge *br);
 739 void br_multicast_open(struct net_bridge *br);
 740 void br_multicast_stop(struct net_bridge *br);
 741 void br_multicast_dev_del(struct net_bridge *br);
 742 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 743                         struct sk_buff *skb, bool local_rcv, bool local_orig);
 744 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
 745 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
 746 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
 747 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
 748 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 749 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
 750 #if IS_ENABLED(CONFIG_IPV6)
 751 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
 752 #endif
 753 struct net_bridge_mdb_entry *
 754 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 755 struct net_bridge_mdb_entry *
 756 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 757 struct net_bridge_port_group *
 758 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
 759                             struct net_bridge_port_group __rcu *next,
 760                             unsigned char flags, const unsigned char *src);
 761 int br_mdb_hash_init(struct net_bridge *br);
 762 void br_mdb_hash_fini(struct net_bridge *br);
 763 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
 764                    struct br_ip *group, int type, u8 flags);
 765 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
 766                    int type);
 767 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
 768                         const struct sk_buff *skb, u8 type, u8 dir);
 769 int br_multicast_init_stats(struct net_bridge *br);
 770 void br_multicast_uninit_stats(struct net_bridge *br);
 771 void br_multicast_get_stats(const struct net_bridge *br,
 772                             const struct net_bridge_port *p,
 773                             struct br_mcast_stats *dest);
 774 void br_mdb_init(void);
 775 void br_mdb_uninit(void);
 776 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
 777 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 778
 779 #define mlock_dereference(X, br) \
 780         rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
 781
 782 static inline bool br_multicast_is_router(struct net_bridge *br)
 783 {
 784         return br->multicast_router == 2 ||
 785                (br->multicast_router == 1 &&
 786                 timer_pending(&br->multicast_router_timer));
 787 }
 788
 789 static inline bool
 790 __br_multicast_querier_exists(struct net_bridge *br,
 791                                 struct bridge_mcast_other_query *querier,
 792                                 const bool is_ipv6)
 793 {
 794         bool own_querier_enabled;
 795
 796         if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
 797                 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
 798                         own_querier_enabled = false;
 799                 else
 800                         own_querier_enabled = true;
 801         } else {
 802                 own_querier_enabled = false;
 803         }
 804
 805         return time_is_before_jiffies(querier->delay_time) &&
 806                (own_querier_enabled || timer_pending(&querier->timer));
 807 }
 808
 809 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 810                                                struct ethhdr *eth)
 811 {
 812         switch (eth->h_proto) {
 813         case (htons(ETH_P_IP)):
 814                 return __br_multicast_querier_exists(br,
 815                         &br->ip4_other_query, false);
 816 #if IS_ENABLED(CONFIG_IPV6)
 817         case (htons(ETH_P_IPV6)):
 818                 return __br_multicast_querier_exists(br,
 819                         &br->ip6_other_query, true);
 820 #endif
 821         default:
 822                 return false;
 823         }
 824 }
 825
 826 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 827 {
 828         return BR_INPUT_SKB_CB(skb)->igmp;
 829 }
 830 #else
 831 static inline int br_multicast_rcv(struct net_bridge *br,
 832                                    struct net_bridge_port *port,
 833                                    struct sk_buff *skb,
 834                                    u16 vid)
 835 {
 836         return 0;
 837 }
 838
 839 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
 840                                                       struct sk_buff *skb, u16 vid)
 841 {
 842         return NULL;
 843 }
 844
 845 static inline int br_multicast_add_port(struct net_bridge_port *port)
 846 {
 847         return 0;
 848 }
 849
 850 static inline void br_multicast_del_port(struct net_bridge_port *port)
 851 {
 852 }
 853
 854 static inline void br_multicast_enable_port(struct net_bridge_port *port)
 855 {
 856 }
 857
 858 static inline void br_multicast_disable_port(struct net_bridge_port *port)
 859 {
 860 }
 861
 862 static inline void br_multicast_init(struct net_bridge *br)
 863 {
 864 }
 865
 866 static inline void br_multicast_open(struct net_bridge *br)
 867 {
 868 }
 869
 870 static inline void br_multicast_stop(struct net_bridge *br)
 871 {
 872 }
 873
 874 static inline void br_multicast_dev_del(struct net_bridge *br)
 875 {
 876 }
 877
 878 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 879                                       struct sk_buff *skb,
 880                                       bool local_rcv, bool local_orig)
 881 {
 882 }
 883
 884 static inline bool br_multicast_is_router(struct net_bridge *br)
 885 {
 886         return false;
 887 }
 888
 889 static inline bool br_multicast_querier_exists(struct net_bridge *br,
 890                                                struct ethhdr *eth)
 891 {
 892         return false;
 893 }
 894
 895 static inline void br_mdb_init(void)
 896 {
 897 }
 898
 899 static inline void br_mdb_uninit(void)
 900 {
 901 }
 902
 903 static inline int br_mdb_hash_init(struct net_bridge *br)
 904 {
 905         return 0;
 906 }
 907
 908 static inline void br_mdb_hash_fini(struct net_bridge *br)
 909 {
 910 }
 911
 912 static inline void br_multicast_count(struct net_bridge *br,
 913                                       const struct net_bridge_port *p,
 914                                       const struct sk_buff *skb,
 915                                       u8 type, u8 dir)
 916 {
 917 }
 918
 919 static inline int br_multicast_init_stats(struct net_bridge *br)
 920 {
 921         return 0;
 922 }
 923
 924 static inline void br_multicast_uninit_stats(struct net_bridge *br)
 925 {
 926 }
 927
 928 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
 929 {
 930         return 0;
 931 }
 932 #endif
 933
 934 /* br_vlan.c */
 935 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
 936 bool br_allowed_ingress(const struct net_bridge *br,
 937                         struct net_bridge_vlan_group *vg, struct sk_buff *skb,
 938                         u16 *vid);
 939 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
 940                        const struct sk_buff *skb);
 941 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
 942 struct sk_buff *br_handle_vlan(struct net_bridge *br,
 943                                const struct net_bridge_port *port,
 944                                struct net_bridge_vlan_group *vg,
 945                                struct sk_buff *skb);
 946 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
 947                 bool *changed, struct netlink_ext_ack *extack);
 948 int br_vlan_delete(struct net_bridge *br, u16 vid);
 949 void br_vlan_flush(struct net_bridge *br);
 950 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
 951 void br_recalculate_fwd_mask(struct net_bridge *br);
 952 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 953 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
 954 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
 955 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
 956 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
 957 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
 958 int br_vlan_init(struct net_bridge *br);
 959 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
 960 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
 961                                struct netlink_ext_ack *extack);
 962 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 963                  bool *changed, struct netlink_ext_ack *extack);
 964 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
 965 void nbp_vlan_flush(struct net_bridge_port *port);
 966 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
 967 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
 968 void br_vlan_get_stats(const struct net_bridge_vlan *v,
 969                        struct br_vlan_stats *stats);
 970 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
 971 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
 972                          void *ptr);
 973 void br_vlan_rtnl_init(void);
 974 void br_vlan_rtnl_uninit(void);
 975 void br_vlan_notify(const struct net_bridge *br,
 976                     const struct net_bridge_port *p,
 977                     u16 vid, u16 vid_range,
 978                     int cmd);
 979 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
 980                              const struct net_bridge_vlan *range_end);
 981
 982 static inline struct net_bridge_vlan_group *br_vlan_group(
 983                                         const struct net_bridge *br)
 984 {
 985         return rtnl_dereference(br->vlgrp);
 986 }
 987
 988 static inline struct net_bridge_vlan_group *nbp_vlan_group(
 989                                         const struct net_bridge_port *p)
 990 {
 991         return rtnl_dereference(p->vlgrp);
 992 }
 993
 994 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
 995                                         const struct net_bridge *br)
 996 {
 997         return rcu_dereference(br->vlgrp);
 998 }
 999
1000 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1001                                         const struct net_bridge_port *p)
1002 {
1003         return rcu_dereference(p->vlgrp);
1004 }
1005
1006 /* Since bridge now depends on 8021Q module, but the time bridge sees the
1007  * skb, the vlan tag will always be present if the frame was tagged.
1008  */
1009 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1010 {
1011         int err = 0;
1012
1013         if (skb_vlan_tag_present(skb)) {
1014                 *vid = skb_vlan_tag_get_id(skb);
1015         } else {
1016                 *vid = 0;
1017                 err = -EINVAL;
1018         }
1019
1020         return err;
1021 }
1022
1023 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1024 {
1025         if (!vg)
1026                 return 0;
1027
1028         smp_rmb();
1029         return vg->pvid;
1030 }
1031
1032 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1033 {
1034         return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1035 }
1036 #else
1037 static inline bool br_allowed_ingress(const struct net_bridge *br,
1038                                       struct net_bridge_vlan_group *vg,
1039                                       struct sk_buff *skb,
1040                                       u16 *vid)
1041 {
1042         return true;
1043 }
1044
1045 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1046                                      const struct sk_buff *skb)
1047 {
1048         return true;
1049 }
1050
1051 static inline bool br_should_learn(struct net_bridge_port *p,
1052                                    struct sk_buff *skb, u16 *vid)
1053 {
1054         return true;
1055 }
1056
1057 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1058                                              const struct net_bridge_port *port,
1059                                              struct net_bridge_vlan_group *vg,
1060                                              struct sk_buff *skb)
1061 {
1062         return skb;
1063 }
1064
1065 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1066                               bool *changed, struct netlink_ext_ack *extack)
1067 {
1068         *changed = false;
1069         return -EOPNOTSUPP;
1070 }
1071
1072 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1073 {
1074         return -EOPNOTSUPP;
1075 }
1076
1077 static inline void br_vlan_flush(struct net_bridge *br)
1078 {
1079 }
1080
1081 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1082 {
1083 }
1084
1085 static inline int br_vlan_init(struct net_bridge *br)
1086 {
1087         return 0;
1088 }
1089
1090 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1091                                bool *changed, struct netlink_ext_ack *extack)
1092 {
1093         *changed = false;
1094         return -EOPNOTSUPP;
1095 }
1096
1097 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1098 {
1099         return -EOPNOTSUPP;
1100 }
1101
1102 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1103 {
1104 }
1105
1106 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1107                                                    u16 vid)
1108 {
1109         return NULL;
1110 }
1111
1112 static inline int nbp_vlan_init(struct net_bridge_port *port,
1113                                 struct netlink_ext_ack *extack)
1114 {
1115         return 0;
1116 }
1117
1118 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1119 {
1120         return 0;
1121 }
1122
1123 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1124 {
1125         return 0;
1126 }
1127
1128 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1129                                           unsigned long val)
1130 {
1131         return -EOPNOTSUPP;
1132 }
1133
1134 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1135                                          u32 filter_mask)
1136 {
1137         return 0;
1138 }
1139
1140 static inline struct net_bridge_vlan_group *br_vlan_group(
1141                                         const struct net_bridge *br)
1142 {
1143         return NULL;
1144 }
1145
1146 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1147                                         const struct net_bridge_port *p)
1148 {
1149         return NULL;
1150 }
1151
1152 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1153                                         const struct net_bridge *br)
1154 {
1155         return NULL;
1156 }
1157
1158 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1159                                         const struct net_bridge_port *p)
1160 {
1161         return NULL;
1162 }
1163
1164 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1165                                      struct br_vlan_stats *stats)
1166 {
1167 }
1168
1169 static inline void br_vlan_port_event(struct net_bridge_port *p,
1170                                       unsigned long event)
1171 {
1172 }
1173
1174 static inline int br_vlan_bridge_event(struct net_device *dev,
1175                                        unsigned long event, void *ptr)
1176 {
1177         return 0;
1178 }
1179
1180 static inline void br_vlan_rtnl_init(void)
1181 {
1182 }
1183
1184 static inline void br_vlan_rtnl_uninit(void)
1185 {
1186 }
1187
1188 static inline void br_vlan_notify(const struct net_bridge *br,
1189                                   const struct net_bridge_port *p,
1190                                   u16 vid, u16 vid_range,
1191                                   int cmd)
1192 {
1193 }
1194 #endif
1195
1196 /* br_vlan_options.c */
1197 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
1198 bool br_vlan_opts_eq(const struct net_bridge_vlan *v1,
1199                      const struct net_bridge_vlan *v2);
1200 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1201 size_t br_vlan_opts_nl_size(void);
1202 int br_vlan_process_options(const struct net_bridge *br,
1203                             const struct net_bridge_port *p,
1204                             struct net_bridge_vlan *range_start,
1205                             struct net_bridge_vlan *range_end,
1206                             struct nlattr **tb,
1207                             struct netlink_ext_ack *extack);
1208 #endif
1209
1210 struct nf_br_ops {
1211         int (*br_dev_xmit_hook)(struct sk_buff *skb);
1212 };
1213 extern const struct nf_br_ops __rcu *nf_br_ops;
1214
1215 /* br_netfilter.c */
1216 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1217 int br_nf_core_init(void);
1218 void br_nf_core_fini(void);
1219 void br_netfilter_rtable_init(struct net_bridge *);
1220 #else
1221 static inline int br_nf_core_init(void) { return 0; }
1222 static inline void br_nf_core_fini(void) {}
1223 #define br_netfilter_rtable_init(x)
1224 #endif
1225
1226 /* br_stp.c */
1227 void br_set_state(struct net_bridge_port *p, unsigned int state);
1228 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1229 void br_init_port(struct net_bridge_port *p);
1230 void br_become_designated_port(struct net_bridge_port *p);
1231
1232 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1233 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1234 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1235 int br_set_max_age(struct net_bridge *br, unsigned long x);
1236 int __set_ageing_time(struct net_device *dev, unsigned long t);
1237 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1238
1239
1240 /* br_stp_if.c */
1241 void br_stp_enable_bridge(struct net_bridge *br);
1242 void br_stp_disable_bridge(struct net_bridge *br);
1243 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1244 void br_stp_enable_port(struct net_bridge_port *p);
1245 void br_stp_disable_port(struct net_bridge_port *p);
1246 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1247 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1248 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1249 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1250 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1251 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1252
1253 /* br_stp_bpdu.c */
1254 struct stp_proto;
1255 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1256                 struct net_device *dev);
1257
1258 /* br_stp_timer.c */
1259 void br_stp_timer_init(struct net_bridge *br);
1260 void br_stp_port_timer_init(struct net_bridge_port *p);
1261 unsigned long br_timer_value(const struct timer_list *timer);
1262
1263 /* br.c */
1264 #if IS_ENABLED(CONFIG_ATM_LANE)
1265 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1266 #endif
1267
1268 /* br_netlink.c */
1269 extern struct rtnl_link_ops br_link_ops;
1270 int br_netlink_init(void);
1271 void br_netlink_fini(void);
1272 void br_ifinfo_notify(int event, const struct net_bridge *br,
1273                       const struct net_bridge_port *port);
1274 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1275                struct netlink_ext_ack *extack);
1276 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1277 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1278                u32 filter_mask, int nlflags);
1279 int br_process_vlan_info(struct net_bridge *br,
1280                          struct net_bridge_port *p, int cmd,
1281                          struct bridge_vlan_info *vinfo_curr,
1282                          struct bridge_vlan_info **vinfo_last,
1283                          bool *changed,
1284                          struct netlink_ext_ack *extack);
1285
1286 #ifdef CONFIG_SYSFS
1287 /* br_sysfs_if.c */
1288 extern const struct sysfs_ops brport_sysfs_ops;
1289 int br_sysfs_addif(struct net_bridge_port *p);
1290 int br_sysfs_renameif(struct net_bridge_port *p);
1291
1292 /* br_sysfs_br.c */
1293 int br_sysfs_addbr(struct net_device *dev);
1294 void br_sysfs_delbr(struct net_device *dev);
1295
1296 #else
1297
1298 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1299 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1300 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1301 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1302 #endif /* CONFIG_SYSFS */
1303
1304 /* br_switchdev.c */
1305 #ifdef CONFIG_NET_SWITCHDEV
1306 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1307 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1308                               struct sk_buff *skb);
1309 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1310                                   const struct sk_buff *skb);
1311 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1312                                unsigned long flags,
1313                                unsigned long mask);
1314 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1315                              int type);
1316 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1317                                struct netlink_ext_ack *extack);
1318 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1319
1320 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1321 {
1322         skb->offload_fwd_mark = 0;
1323 }
1324 #else
1325 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1326 {
1327         return 0;
1328 }
1329
1330 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1331                                             struct sk_buff *skb)
1332 {
1333 }
1334
1335 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1336                                                 const struct sk_buff *skb)
1337 {
1338         return true;
1339 }
1340
1341 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1342                                              unsigned long flags,
1343                                              unsigned long mask)
1344 {
1345         return 0;
1346 }
1347
1348 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1349                                              u16 vid, u16 flags,
1350                                              struct netlink_ext_ack *extack)
1351 {
1352         return -EOPNOTSUPP;
1353 }
1354
1355 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1356 {
1357         return -EOPNOTSUPP;
1358 }
1359
1360 static inline void
1361 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1362 {
1363 }
1364
1365 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1366 {
1367 }
1368 #endif /* CONFIG_NET_SWITCHDEV */
1369
1370 /* br_arp_nd_proxy.c */
1371 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1372 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1373                               u16 vid, struct net_bridge_port *p);
1374 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1375                        u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1376 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1377 #endif