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 */ 37enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41}; 42 43#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46#define BR_GROUPFWD_8021AD 0xB801u 47 48/* Path to usermode spanning tree program */ 49#define BR_STP_PROG "/sbin/bridge-stp" 50 51#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53typedef struct bridge_id bridge_id; 54typedef struct mac_addr mac_addr; 55typedef __u16 port_id; 56 57struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60}; 61 62struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64}; 65 66#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67/* our own querier */ 68struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71}; 72 73/* other querier */ 74struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77}; 78 79/* selected querier */ 80struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83}; 84 85/* IGMP/MLD statistics */ 86struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89}; 90#endif 91 92struct br_vlan_stats { 93 u64 rx_bytes; 94 u64 rx_packets; 95 u64 tx_bytes; 96 u64 tx_packets; 97 struct u64_stats_sync syncp; 98}; 99 100struct br_tunnel_info { 101 __be64 tunnel_id; 102 struct metadata_dst __rcu *tunnel_dst; 103}; 104 105/* private vlan flags */ 106enum { 107 BR_VLFLAG_PER_PORT_STATS = BIT(0), 108 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 109}; 110 111/** 112 * struct net_bridge_vlan - per-vlan entry 113 * 114 * @vnode: rhashtable member 115 * @vid: VLAN id 116 * @flags: bridge vlan flags 117 * @priv_flags: private (in-kernel) bridge vlan flags 118 * @state: STP state (e.g. blocking, learning, forwarding) 119 * @stats: per-cpu VLAN statistics 120 * @br: if MASTER flag set, this points to a bridge struct 121 * @port: if MASTER flag unset, this points to a port struct 122 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 123 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 124 * for this VLAN entry 125 * @vlist: sorted list of VLAN entries 126 * @rcu: used for entry destruction 127 * 128 * This structure is shared between the global per-VLAN entries contained in 129 * the bridge rhashtable and the local per-port per-VLAN entries contained in 130 * the port's rhashtable. The union entries should be interpreted depending on 131 * the entry flags that are set. 132 */ 133struct net_bridge_vlan { 134 struct rhash_head vnode; 135 struct rhash_head tnode; 136 u16 vid; 137 u16 flags; 138 u16 priv_flags; 139 u8 state; 140 struct br_vlan_stats __percpu *stats; 141 union { 142 struct net_bridge *br; 143 struct net_bridge_port *port; 144 }; 145 union { 146 refcount_t refcnt; 147 struct net_bridge_vlan *brvlan; 148 }; 149 150 struct br_tunnel_info tinfo; 151 152 struct list_head vlist; 153 154 struct rcu_head rcu; 155}; 156 157/** 158 * struct net_bridge_vlan_group 159 * 160 * @vlan_hash: VLAN entry rhashtable 161 * @vlan_list: sorted VLAN entry list 162 * @num_vlans: number of total VLAN entries 163 * @pvid: PVID VLAN id 164 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 165 * 166 * IMPORTANT: Be careful when checking if there're VLAN entries using list 167 * primitives because the bridge can have entries in its list which 168 * are just for global context but not for filtering, i.e. they have 169 * the master flag set but not the brentry flag. If you have to check 170 * if there're "real" entries in the bridge please test @num_vlans 171 */ 172struct net_bridge_vlan_group { 173 struct rhashtable vlan_hash; 174 struct rhashtable tunnel_hash; 175 struct list_head vlan_list; 176 u16 num_vlans; 177 u16 pvid; 178 u8 pvid_state; 179}; 180 181/* bridge fdb flags */ 182enum { 183 BR_FDB_LOCAL, 184 BR_FDB_STATIC, 185 BR_FDB_STICKY, 186 BR_FDB_ADDED_BY_USER, 187 BR_FDB_ADDED_BY_EXT_LEARN, 188 BR_FDB_OFFLOADED, 189 BR_FDB_NOTIFY, 190 BR_FDB_NOTIFY_INACTIVE 191}; 192 193struct net_bridge_fdb_key { 194 mac_addr addr; 195 u16 vlan_id; 196}; 197 198struct net_bridge_fdb_entry { 199 struct rhash_head rhnode; 200 struct net_bridge_port *dst; 201 202 struct net_bridge_fdb_key key; 203 struct hlist_node fdb_node; 204 unsigned long flags; 205 206 /* write-heavy members should not affect lookups */ 207 unsigned long updated ____cacheline_aligned_in_smp; 208 unsigned long used; 209 210 struct rcu_head rcu; 211}; 212 213#define MDB_PG_FLAGS_PERMANENT BIT(0) 214#define MDB_PG_FLAGS_OFFLOAD BIT(1) 215#define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 216#define MDB_PG_FLAGS_STAR_EXCL BIT(3) 217#define MDB_PG_FLAGS_BLOCKED BIT(4) 218 219#define PG_SRC_ENT_LIMIT 32 220 221#define BR_SGRP_F_DELETE BIT(0) 222#define BR_SGRP_F_SEND BIT(1) 223#define BR_SGRP_F_INSTALLED BIT(2) 224 225struct net_bridge_mcast_gc { 226 struct hlist_node gc_node; 227 void (*destroy)(struct net_bridge_mcast_gc *gc); 228}; 229 230struct net_bridge_group_src { 231 struct hlist_node node; 232 233 struct br_ip addr; 234 struct net_bridge_port_group *pg; 235 u8 flags; 236 u8 src_query_rexmit_cnt; 237 struct timer_list timer; 238 239 struct net_bridge *br; 240 struct net_bridge_mcast_gc mcast_gc; 241 struct rcu_head rcu; 242}; 243 244struct net_bridge_port_group_sg_key { 245 struct net_bridge_port *port; 246 struct br_ip addr; 247}; 248 249struct net_bridge_port_group { 250 struct net_bridge_port_group __rcu *next; 251 struct net_bridge_port_group_sg_key key; 252 unsigned char eth_addr[ETH_ALEN] __aligned(2); 253 unsigned char flags; 254 unsigned char filter_mode; 255 unsigned char grp_query_rexmit_cnt; 256 unsigned char rt_protocol; 257 258 struct hlist_head src_list; 259 unsigned int src_ents; 260 struct timer_list timer; 261 struct timer_list rexmit_timer; 262 struct hlist_node mglist; 263 264 struct rhash_head rhnode; 265 struct net_bridge_mcast_gc mcast_gc; 266 struct rcu_head rcu; 267}; 268 269struct net_bridge_mdb_entry { 270 struct rhash_head rhnode; 271 struct net_bridge *br; 272 struct net_bridge_port_group __rcu *ports; 273 struct br_ip addr; 274 bool host_joined; 275 276 struct timer_list timer; 277 struct hlist_node mdb_node; 278 279 struct net_bridge_mcast_gc mcast_gc; 280 struct rcu_head rcu; 281}; 282 283struct net_bridge_port { 284 struct net_bridge *br; 285 struct net_device *dev; 286 struct list_head list; 287 288 unsigned long flags; 289#ifdef CONFIG_BRIDGE_VLAN_FILTERING 290 struct net_bridge_vlan_group __rcu *vlgrp; 291#endif 292 struct net_bridge_port __rcu *backup_port; 293 294 /* STP */ 295 u8 priority; 296 u8 state; 297 u16 port_no; 298 unsigned char topology_change_ack; 299 unsigned char config_pending; 300 port_id port_id; 301 port_id designated_port; 302 bridge_id designated_root; 303 bridge_id designated_bridge; 304 u32 path_cost; 305 u32 designated_cost; 306 unsigned long designated_age; 307 308 struct timer_list forward_delay_timer; 309 struct timer_list hold_timer; 310 struct timer_list message_age_timer; 311 struct kobject kobj; 312 struct rcu_head rcu; 313 314#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 315 struct bridge_mcast_own_query ip4_own_query; 316#if IS_ENABLED(CONFIG_IPV6) 317 struct bridge_mcast_own_query ip6_own_query; 318#endif /* IS_ENABLED(CONFIG_IPV6) */ 319 unsigned char multicast_router; 320 struct bridge_mcast_stats __percpu *mcast_stats; 321 struct timer_list multicast_router_timer; 322 struct hlist_head mglist; 323 struct hlist_node rlist; 324#endif 325 326#ifdef CONFIG_SYSFS 327 char sysfs_name[IFNAMSIZ]; 328#endif 329 330#ifdef CONFIG_NET_POLL_CONTROLLER 331 struct netpoll *np; 332#endif 333#ifdef CONFIG_NET_SWITCHDEV 334 int offload_fwd_mark; 335#endif 336 u16 group_fwd_mask; 337 u16 backup_redirected_cnt; 338 339 struct bridge_stp_xstats stp_xstats; 340}; 341 342#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 343 344#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 345#define br_promisc_port(p) ((p)->flags & BR_PROMISC) 346 347static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 348{ 349 return rcu_dereference(dev->rx_handler_data); 350} 351 352static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 353{ 354 return netif_is_bridge_port(dev) ? 355 rtnl_dereference(dev->rx_handler_data) : NULL; 356} 357 358static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 359{ 360 return netif_is_bridge_port(dev) ? 361 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 362} 363 364enum net_bridge_opts { 365 BROPT_VLAN_ENABLED, 366 BROPT_VLAN_STATS_ENABLED, 367 BROPT_NF_CALL_IPTABLES, 368 BROPT_NF_CALL_IP6TABLES, 369 BROPT_NF_CALL_ARPTABLES, 370 BROPT_GROUP_ADDR_SET, 371 BROPT_MULTICAST_ENABLED, 372 BROPT_MULTICAST_QUERIER, 373 BROPT_MULTICAST_QUERY_USE_IFADDR, 374 BROPT_MULTICAST_STATS_ENABLED, 375 BROPT_HAS_IPV6_ADDR, 376 BROPT_NEIGH_SUPPRESS_ENABLED, 377 BROPT_MTU_SET_BY_USER, 378 BROPT_VLAN_STATS_PER_PORT, 379 BROPT_NO_LL_LEARN, 380 BROPT_VLAN_BRIDGE_BINDING, 381}; 382 383struct net_bridge { 384 spinlock_t lock; 385 spinlock_t hash_lock; 386 struct list_head port_list; 387 struct net_device *dev; 388 struct pcpu_sw_netstats __percpu *stats; 389 unsigned long options; 390 /* These fields are accessed on each packet */ 391#ifdef CONFIG_BRIDGE_VLAN_FILTERING 392 __be16 vlan_proto; 393 u16 default_pvid; 394 struct net_bridge_vlan_group __rcu *vlgrp; 395#endif 396 397 struct rhashtable fdb_hash_tbl; 398#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 399 union { 400 struct rtable fake_rtable; 401 struct rt6_info fake_rt6_info; 402 }; 403#endif 404 u16 group_fwd_mask; 405 u16 group_fwd_mask_required; 406 407 /* STP */ 408 bridge_id designated_root; 409 bridge_id bridge_id; 410 unsigned char topology_change; 411 unsigned char topology_change_detected; 412 u16 root_port; 413 unsigned long max_age; 414 unsigned long hello_time; 415 unsigned long forward_delay; 416 unsigned long ageing_time; 417 unsigned long bridge_max_age; 418 unsigned long bridge_hello_time; 419 unsigned long bridge_forward_delay; 420 unsigned long bridge_ageing_time; 421 u32 root_path_cost; 422 423 u8 group_addr[ETH_ALEN]; 424 425 enum { 426 BR_NO_STP, /* no spanning tree */ 427 BR_KERNEL_STP, /* old STP in kernel */ 428 BR_USER_STP, /* new RSTP in userspace */ 429 } stp_enabled; 430 431#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 432 433 u32 hash_max; 434 435 u32 multicast_last_member_count; 436 u32 multicast_startup_query_count; 437 438 u8 multicast_igmp_version; 439 u8 multicast_router; 440#if IS_ENABLED(CONFIG_IPV6) 441 u8 multicast_mld_version; 442#endif 443 spinlock_t multicast_lock; 444 unsigned long multicast_last_member_interval; 445 unsigned long multicast_membership_interval; 446 unsigned long multicast_querier_interval; 447 unsigned long multicast_query_interval; 448 unsigned long multicast_query_response_interval; 449 unsigned long multicast_startup_query_interval; 450 451 struct rhashtable mdb_hash_tbl; 452 struct rhashtable sg_port_tbl; 453 454 struct hlist_head mcast_gc_list; 455 struct hlist_head mdb_list; 456 struct hlist_head router_list; 457 458 struct timer_list multicast_router_timer; 459 struct bridge_mcast_other_query ip4_other_query; 460 struct bridge_mcast_own_query ip4_own_query; 461 struct bridge_mcast_querier ip4_querier; 462 struct bridge_mcast_stats __percpu *mcast_stats; 463#if IS_ENABLED(CONFIG_IPV6) 464 struct bridge_mcast_other_query ip6_other_query; 465 struct bridge_mcast_own_query ip6_own_query; 466 struct bridge_mcast_querier ip6_querier; 467#endif /* IS_ENABLED(CONFIG_IPV6) */ 468 struct work_struct mcast_gc_work; 469#endif 470 471 struct timer_list hello_timer; 472 struct timer_list tcn_timer; 473 struct timer_list topology_change_timer; 474 struct delayed_work gc_work; 475 struct kobject *ifobj; 476 u32 auto_cnt; 477 478#ifdef CONFIG_NET_SWITCHDEV 479 int offload_fwd_mark; 480#endif 481 struct hlist_head fdb_list; 482 483#if IS_ENABLED(CONFIG_BRIDGE_MRP) 484 struct list_head mrp_list; 485#endif 486}; 487 488struct br_input_skb_cb { 489 struct net_device *brdev; 490 491 u16 frag_max_size; 492#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 493 u8 igmp; 494 u8 mrouters_only:1; 495#endif 496 u8 proxyarp_replied:1; 497 u8 src_port_isolated:1; 498#ifdef CONFIG_BRIDGE_VLAN_FILTERING 499 u8 vlan_filtered:1; 500#endif 501#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 502 u8 br_netfilter_broute:1; 503#endif 504 505#ifdef CONFIG_NET_SWITCHDEV 506 int offload_fwd_mark; 507#endif 508}; 509 510#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 511 512#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 513# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 514#else 515# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 516#endif 517 518#define br_printk(level, br, format, args...) \ 519 printk(level "%s: " format, (br)->dev->name, ##args) 520 521#define br_err(__br, format, args...) \ 522 br_printk(KERN_ERR, __br, format, ##args) 523#define br_warn(__br, format, args...) \ 524 br_printk(KERN_WARNING, __br, format, ##args) 525#define br_notice(__br, format, args...) \ 526 br_printk(KERN_NOTICE, __br, format, ##args) 527#define br_info(__br, format, args...) \ 528 br_printk(KERN_INFO, __br, format, ##args) 529 530#define br_debug(br, format, args...) \ 531 pr_debug("%s: " format, (br)->dev->name, ##args) 532 533/* called under bridge lock */ 534static inline int br_is_root_bridge(const struct net_bridge *br) 535{ 536 return !memcmp(&br->bridge_id, &br->designated_root, 8); 537} 538 539/* check if a VLAN entry is global */ 540static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 541{ 542 return v->flags & BRIDGE_VLAN_INFO_MASTER; 543} 544 545/* check if a VLAN entry is used by the bridge */ 546static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 547{ 548 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 549} 550 551/* check if we should use the vlan entry, returns false if it's only context */ 552static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 553{ 554 if (br_vlan_is_master(v)) { 555 if (br_vlan_is_brentry(v)) 556 return true; 557 else 558 return false; 559 } 560 561 return true; 562} 563 564static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 565{ 566 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 567} 568 569static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 570{ 571 bool ret = vid > 0 && vid < VLAN_VID_MASK; 572 573 if (!ret) 574 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 575 576 return ret; 577} 578 579static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 580 const struct bridge_vlan_info *last, 581 struct netlink_ext_ack *extack) 582{ 583 /* pvid flag is not allowed in ranges */ 584 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 585 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 586 return false; 587 } 588 589 /* when cur is the range end, check if: 590 * - it has range start flag 591 * - range ids are invalid (end is equal to or before start) 592 */ 593 if (last) { 594 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 595 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 596 return false; 597 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 598 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 599 return false; 600 } else if (cur->vid <= last->vid) { 601 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 602 return false; 603 } 604 } 605 606 /* check for required range flags */ 607 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 608 BRIDGE_VLAN_INFO_RANGE_END))) { 609 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 610 return false; 611 } 612 613 return true; 614} 615 616static inline int br_afspec_cmd_to_rtm(int cmd) 617{ 618 switch (cmd) { 619 case RTM_SETLINK: 620 return RTM_NEWVLAN; 621 case RTM_DELLINK: 622 return RTM_DELVLAN; 623 } 624 625 return 0; 626} 627 628static inline int br_opt_get(const struct net_bridge *br, 629 enum net_bridge_opts opt) 630{ 631 return test_bit(opt, &br->options); 632} 633 634int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 635 struct netlink_ext_ack *extack); 636int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 637int br_boolopt_multi_toggle(struct net_bridge *br, 638 struct br_boolopt_multi *bm, 639 struct netlink_ext_ack *extack); 640void br_boolopt_multi_get(const struct net_bridge *br, 641 struct br_boolopt_multi *bm); 642void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 643 644/* br_device.c */ 645void br_dev_setup(struct net_device *dev); 646void br_dev_delete(struct net_device *dev, struct list_head *list); 647netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 648#ifdef CONFIG_NET_POLL_CONTROLLER 649static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 650 struct sk_buff *skb) 651{ 652 netpoll_send_skb(p->np, skb); 653} 654 655int br_netpoll_enable(struct net_bridge_port *p); 656void br_netpoll_disable(struct net_bridge_port *p); 657#else 658static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 659 struct sk_buff *skb) 660{ 661} 662 663static inline int br_netpoll_enable(struct net_bridge_port *p) 664{ 665 return 0; 666} 667 668static inline void br_netpoll_disable(struct net_bridge_port *p) 669{ 670} 671#endif 672 673/* br_fdb.c */ 674int br_fdb_init(void); 675void br_fdb_fini(void); 676int br_fdb_hash_init(struct net_bridge *br); 677void br_fdb_hash_fini(struct net_bridge *br); 678void br_fdb_flush(struct net_bridge *br); 679void br_fdb_find_delete_local(struct net_bridge *br, 680 const struct net_bridge_port *p, 681 const unsigned char *addr, u16 vid); 682void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 683void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 684void br_fdb_cleanup(struct work_struct *work); 685void br_fdb_delete_by_port(struct net_bridge *br, 686 const struct net_bridge_port *p, u16 vid, int do_all); 687struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 688 const unsigned char *addr, 689 __u16 vid); 690int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 691int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 692 unsigned long off); 693int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 694 const unsigned char *addr, u16 vid); 695void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 696 const unsigned char *addr, u16 vid, unsigned long flags); 697 698int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 699 struct net_device *dev, const unsigned char *addr, u16 vid); 700int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 701 const unsigned char *addr, u16 vid, u16 nlh_flags, 702 struct netlink_ext_ack *extack); 703int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 704 struct net_device *dev, struct net_device *fdev, int *idx); 705int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 706 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 707 struct netlink_ext_ack *extack); 708int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 709void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 710int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 711 const unsigned char *addr, u16 vid, 712 bool swdev_notify); 713int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 714 const unsigned char *addr, u16 vid, 715 bool swdev_notify); 716void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 717 const unsigned char *addr, u16 vid, bool offloaded); 718 719/* br_forward.c */ 720enum br_pkt_type { 721 BR_PKT_UNICAST, 722 BR_PKT_MULTICAST, 723 BR_PKT_BROADCAST 724}; 725int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 726void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 727 bool local_rcv, bool local_orig); 728int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 729void br_flood(struct net_bridge *br, struct sk_buff *skb, 730 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 731 732/* return true if both source port and dest port are isolated */ 733static inline bool br_skb_isolated(const struct net_bridge_port *to, 734 const struct sk_buff *skb) 735{ 736 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 737 (to->flags & BR_ISOLATED); 738} 739 740/* br_if.c */ 741void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 742int br_add_bridge(struct net *net, const char *name); 743int br_del_bridge(struct net *net, const char *name); 744int br_add_if(struct net_bridge *br, struct net_device *dev, 745 struct netlink_ext_ack *extack); 746int br_del_if(struct net_bridge *br, struct net_device *dev); 747void br_mtu_auto_adjust(struct net_bridge *br); 748netdev_features_t br_features_recompute(struct net_bridge *br, 749 netdev_features_t features); 750void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 751void br_manage_promisc(struct net_bridge *br); 752int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 753 754/* br_input.c */ 755int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 756rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 757 758static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 759{ 760 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 761} 762 763static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 764{ 765 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 766} 767 768static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 769{ 770 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 771} 772 773static inline struct net_bridge_port * 774br_port_get_check_rtnl(const struct net_device *dev) 775{ 776 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 777} 778 779/* br_ioctl.c */ 780int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 781int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 782 void __user *arg); 783 784/* br_multicast.c */ 785#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 786int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 787 struct sk_buff *skb, u16 vid); 788struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 789 struct sk_buff *skb, u16 vid); 790int br_multicast_add_port(struct net_bridge_port *port); 791void br_multicast_del_port(struct net_bridge_port *port); 792void br_multicast_enable_port(struct net_bridge_port *port); 793void br_multicast_disable_port(struct net_bridge_port *port); 794void br_multicast_init(struct net_bridge *br); 795void br_multicast_join_snoopers(struct net_bridge *br); 796void br_multicast_leave_snoopers(struct net_bridge *br); 797void br_multicast_open(struct net_bridge *br); 798void br_multicast_stop(struct net_bridge *br); 799void br_multicast_dev_del(struct net_bridge *br); 800void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 801 struct sk_buff *skb, bool local_rcv, bool local_orig); 802int br_multicast_set_router(struct net_bridge *br, unsigned long val); 803int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 804int br_multicast_toggle(struct net_bridge *br, unsigned long val); 805int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 806int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 807int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 808#if IS_ENABLED(CONFIG_IPV6) 809int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 810#endif 811struct net_bridge_mdb_entry * 812br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 813struct net_bridge_mdb_entry * 814br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 815struct net_bridge_port_group * 816br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 817 struct net_bridge_port_group __rcu *next, 818 unsigned char flags, const unsigned char *src, 819 u8 filter_mode, u8 rt_protocol); 820int br_mdb_hash_init(struct net_bridge *br); 821void br_mdb_hash_fini(struct net_bridge *br); 822void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 823 struct net_bridge_port_group *pg, int type); 824void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 825 int type); 826void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 827 struct net_bridge_port_group *pg, 828 struct net_bridge_port_group __rcu **pp); 829void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 830 const struct sk_buff *skb, u8 type, u8 dir); 831int br_multicast_init_stats(struct net_bridge *br); 832void br_multicast_uninit_stats(struct net_bridge *br); 833void br_multicast_get_stats(const struct net_bridge *br, 834 const struct net_bridge_port *p, 835 struct br_mcast_stats *dest); 836void br_mdb_init(void); 837void br_mdb_uninit(void); 838void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 839void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 840void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 841 u8 filter_mode); 842void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 843 struct net_bridge_port_group *sg); 844 845#define mlock_dereference(X, br) \ 846 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 847 848static inline bool br_multicast_is_router(struct net_bridge *br) 849{ 850 return br->multicast_router == 2 || 851 (br->multicast_router == 1 && 852 timer_pending(&br->multicast_router_timer)); 853} 854 855static inline bool 856__br_multicast_querier_exists(struct net_bridge *br, 857 struct bridge_mcast_other_query *querier, 858 const bool is_ipv6) 859{ 860 bool own_querier_enabled; 861 862 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 863 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 864 own_querier_enabled = false; 865 else 866 own_querier_enabled = true; 867 } else { 868 own_querier_enabled = false; 869 } 870 871 return time_is_before_jiffies(querier->delay_time) && 872 (own_querier_enabled || timer_pending(&querier->timer)); 873} 874 875static inline bool br_multicast_querier_exists(struct net_bridge *br, 876 struct ethhdr *eth) 877{ 878 switch (eth->h_proto) { 879 case (htons(ETH_P_IP)): 880 return __br_multicast_querier_exists(br, 881 &br->ip4_other_query, false); 882#if IS_ENABLED(CONFIG_IPV6) 883 case (htons(ETH_P_IPV6)): 884 return __br_multicast_querier_exists(br, 885 &br->ip6_other_query, true); 886#endif 887 default: 888 return false; 889 } 890} 891 892static inline bool br_multicast_is_star_g(const struct br_ip *ip) 893{ 894 switch (ip->proto) { 895 case htons(ETH_P_IP): 896 return ipv4_is_zeronet(ip->src.ip4); 897#if IS_ENABLED(CONFIG_IPV6) 898 case htons(ETH_P_IPV6): 899 return ipv6_addr_any(&ip->src.ip6); 900#endif 901 default: 902 return false; 903 } 904} 905 906static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 907 __be16 proto) 908{ 909 switch (proto) { 910 case htons(ETH_P_IP): 911 return !!(br->multicast_igmp_version == 3); 912#if IS_ENABLED(CONFIG_IPV6) 913 case htons(ETH_P_IPV6): 914 return !!(br->multicast_mld_version == 2); 915#endif 916 default: 917 return false; 918 } 919} 920 921static inline int br_multicast_igmp_type(const struct sk_buff *skb) 922{ 923 return BR_INPUT_SKB_CB(skb)->igmp; 924} 925 926static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 927{ 928 return br->multicast_last_member_interval * 929 br->multicast_last_member_count; 930} 931 932static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 933{ 934 return br->multicast_membership_interval; 935} 936#else 937static inline int br_multicast_rcv(struct net_bridge *br, 938 struct net_bridge_port *port, 939 struct sk_buff *skb, 940 u16 vid) 941{ 942 return 0; 943} 944 945static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 946 struct sk_buff *skb, u16 vid) 947{ 948 return NULL; 949} 950 951static inline int br_multicast_add_port(struct net_bridge_port *port) 952{ 953 return 0; 954} 955 956static inline void br_multicast_del_port(struct net_bridge_port *port) 957{ 958} 959 960static inline void br_multicast_enable_port(struct net_bridge_port *port) 961{ 962} 963 964static inline void br_multicast_disable_port(struct net_bridge_port *port) 965{ 966} 967 968static inline void br_multicast_init(struct net_bridge *br) 969{ 970} 971 972static inline void br_multicast_join_snoopers(struct net_bridge *br) 973{ 974} 975 976static inline void br_multicast_leave_snoopers(struct net_bridge *br) 977{ 978} 979 980static inline void br_multicast_open(struct net_bridge *br) 981{ 982} 983 984static inline void br_multicast_stop(struct net_bridge *br) 985{ 986} 987 988static inline void br_multicast_dev_del(struct net_bridge *br) 989{ 990} 991 992static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 993 struct sk_buff *skb, 994 bool local_rcv, bool local_orig) 995{ 996} 997 998static inline bool br_multicast_is_router(struct net_bridge *br) 999{ 1000 return false; 1001} 1002 1003static inline bool br_multicast_querier_exists(struct net_bridge *br, 1004 struct ethhdr *eth) 1005{ 1006 return false; 1007} 1008 1009static inline void br_mdb_init(void) 1010{ 1011} 1012 1013static inline void br_mdb_uninit(void) 1014{ 1015} 1016 1017static inline int br_mdb_hash_init(struct net_bridge *br) 1018{ 1019 return 0; 1020} 1021 1022static inline void br_mdb_hash_fini(struct net_bridge *br) 1023{ 1024} 1025 1026static inline void br_multicast_count(struct net_bridge *br, 1027 const struct net_bridge_port *p, 1028 const struct sk_buff *skb, 1029 u8 type, u8 dir) 1030{ 1031} 1032 1033static inline int br_multicast_init_stats(struct net_bridge *br) 1034{ 1035 return 0; 1036} 1037 1038static inline void br_multicast_uninit_stats(struct net_bridge *br) 1039{ 1040} 1041 1042static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1043{ 1044 return 0; 1045} 1046#endif 1047 1048/* br_vlan.c */ 1049#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1050bool br_allowed_ingress(const struct net_bridge *br, 1051 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1052 u16 *vid, u8 *state); 1053bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1054 const struct sk_buff *skb); 1055bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1056struct sk_buff *br_handle_vlan(struct net_bridge *br, 1057 const struct net_bridge_port *port, 1058 struct net_bridge_vlan_group *vg, 1059 struct sk_buff *skb); 1060int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1061 bool *changed, struct netlink_ext_ack *extack); 1062int br_vlan_delete(struct net_bridge *br, u16 vid); 1063void br_vlan_flush(struct net_bridge *br); 1064struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1065void br_recalculate_fwd_mask(struct net_bridge *br); 1066int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1067int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1068int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1069int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1070int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1071int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1072int br_vlan_init(struct net_bridge *br); 1073int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1074int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1075 struct netlink_ext_ack *extack); 1076int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1077 bool *changed, struct netlink_ext_ack *extack); 1078int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1079void nbp_vlan_flush(struct net_bridge_port *port); 1080int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1081int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1082void br_vlan_get_stats(const struct net_bridge_vlan *v, 1083 struct br_vlan_stats *stats); 1084void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1085int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1086 void *ptr); 1087void br_vlan_rtnl_init(void); 1088void br_vlan_rtnl_uninit(void); 1089void br_vlan_notify(const struct net_bridge *br, 1090 const struct net_bridge_port *p, 1091 u16 vid, u16 vid_range, 1092 int cmd); 1093bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1094 const struct net_bridge_vlan *range_end); 1095 1096static inline struct net_bridge_vlan_group *br_vlan_group( 1097 const struct net_bridge *br) 1098{ 1099 return rtnl_dereference(br->vlgrp); 1100} 1101 1102static inline struct net_bridge_vlan_group *nbp_vlan_group( 1103 const struct net_bridge_port *p) 1104{ 1105 return rtnl_dereference(p->vlgrp); 1106} 1107 1108static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1109 const struct net_bridge *br) 1110{ 1111 return rcu_dereference(br->vlgrp); 1112} 1113 1114static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1115 const struct net_bridge_port *p) 1116{ 1117 return rcu_dereference(p->vlgrp); 1118} 1119 1120/* Since bridge now depends on 8021Q module, but the time bridge sees the 1121 * skb, the vlan tag will always be present if the frame was tagged. 1122 */ 1123static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1124{ 1125 int err = 0; 1126 1127 if (skb_vlan_tag_present(skb)) { 1128 *vid = skb_vlan_tag_get_id(skb); 1129 } else { 1130 *vid = 0; 1131 err = -EINVAL; 1132 } 1133 1134 return err; 1135} 1136 1137static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1138{ 1139 if (!vg) 1140 return 0; 1141 1142 smp_rmb(); 1143 return vg->pvid; 1144} 1145 1146static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1147{ 1148 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1149} 1150#else 1151static inline bool br_allowed_ingress(const struct net_bridge *br, 1152 struct net_bridge_vlan_group *vg, 1153 struct sk_buff *skb, 1154 u16 *vid, u8 *state) 1155{ 1156 return true; 1157} 1158 1159static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1160 const struct sk_buff *skb) 1161{ 1162 return true; 1163} 1164 1165static inline bool br_should_learn(struct net_bridge_port *p, 1166 struct sk_buff *skb, u16 *vid) 1167{ 1168 return true; 1169} 1170 1171static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1172 const struct net_bridge_port *port, 1173 struct net_bridge_vlan_group *vg, 1174 struct sk_buff *skb) 1175{ 1176 return skb; 1177} 1178 1179static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1180 bool *changed, struct netlink_ext_ack *extack) 1181{ 1182 *changed = false; 1183 return -EOPNOTSUPP; 1184} 1185 1186static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1187{ 1188 return -EOPNOTSUPP; 1189} 1190 1191static inline void br_vlan_flush(struct net_bridge *br) 1192{ 1193} 1194 1195static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1196{ 1197} 1198 1199static inline int br_vlan_init(struct net_bridge *br) 1200{ 1201 return 0; 1202} 1203 1204static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1205 bool *changed, struct netlink_ext_ack *extack) 1206{ 1207 *changed = false; 1208 return -EOPNOTSUPP; 1209} 1210 1211static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1212{ 1213 return -EOPNOTSUPP; 1214} 1215 1216static inline void nbp_vlan_flush(struct net_bridge_port *port) 1217{ 1218} 1219 1220static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1221 u16 vid) 1222{ 1223 return NULL; 1224} 1225 1226static inline int nbp_vlan_init(struct net_bridge_port *port, 1227 struct netlink_ext_ack *extack) 1228{ 1229 return 0; 1230} 1231 1232static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1233{ 1234 return 0; 1235} 1236 1237static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1238{ 1239 return 0; 1240} 1241 1242static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1243 unsigned long val) 1244{ 1245 return -EOPNOTSUPP; 1246} 1247 1248static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1249 u32 filter_mask) 1250{ 1251 return 0; 1252} 1253 1254static inline struct net_bridge_vlan_group *br_vlan_group( 1255 const struct net_bridge *br) 1256{ 1257 return NULL; 1258} 1259 1260static inline struct net_bridge_vlan_group *nbp_vlan_group( 1261 const struct net_bridge_port *p) 1262{ 1263 return NULL; 1264} 1265 1266static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1267 const struct net_bridge *br) 1268{ 1269 return NULL; 1270} 1271 1272static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1273 const struct net_bridge_port *p) 1274{ 1275 return NULL; 1276} 1277 1278static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1279 struct br_vlan_stats *stats) 1280{ 1281} 1282 1283static inline void br_vlan_port_event(struct net_bridge_port *p, 1284 unsigned long event) 1285{ 1286} 1287 1288static inline int br_vlan_bridge_event(struct net_device *dev, 1289 unsigned long event, void *ptr) 1290{ 1291 return 0; 1292} 1293 1294static inline void br_vlan_rtnl_init(void) 1295{ 1296} 1297 1298static inline void br_vlan_rtnl_uninit(void) 1299{ 1300} 1301 1302static inline void br_vlan_notify(const struct net_bridge *br, 1303 const struct net_bridge_port *p, 1304 u16 vid, u16 vid_range, 1305 int cmd) 1306{ 1307} 1308 1309static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1310 const struct net_bridge_vlan *range_end) 1311{ 1312 return true; 1313} 1314#endif 1315 1316/* br_vlan_options.c */ 1317#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1318bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1319 const struct net_bridge_vlan *range_end); 1320bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1321size_t br_vlan_opts_nl_size(void); 1322int br_vlan_process_options(const struct net_bridge *br, 1323 const struct net_bridge_port *p, 1324 struct net_bridge_vlan *range_start, 1325 struct net_bridge_vlan *range_end, 1326 struct nlattr **tb, 1327 struct netlink_ext_ack *extack); 1328 1329/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1330static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1331{ 1332 return READ_ONCE(v->state); 1333} 1334 1335static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1336{ 1337 WRITE_ONCE(v->state, state); 1338} 1339 1340static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1341{ 1342 return READ_ONCE(vg->pvid_state); 1343} 1344 1345static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1346 u8 state) 1347{ 1348 WRITE_ONCE(vg->pvid_state, state); 1349} 1350 1351/* learn_allow is true at ingress and false at egress */ 1352static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1353{ 1354 switch (state) { 1355 case BR_STATE_LEARNING: 1356 return learn_allow; 1357 case BR_STATE_FORWARDING: 1358 return true; 1359 default: 1360 return false; 1361 } 1362} 1363#endif 1364 1365struct nf_br_ops { 1366 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1367}; 1368extern const struct nf_br_ops __rcu *nf_br_ops; 1369 1370/* br_netfilter.c */ 1371#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1372int br_nf_core_init(void); 1373void br_nf_core_fini(void); 1374void br_netfilter_rtable_init(struct net_bridge *); 1375#else 1376static inline int br_nf_core_init(void) { return 0; } 1377static inline void br_nf_core_fini(void) {} 1378#define br_netfilter_rtable_init(x) 1379#endif 1380 1381/* br_stp.c */ 1382void br_set_state(struct net_bridge_port *p, unsigned int state); 1383struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1384void br_init_port(struct net_bridge_port *p); 1385void br_become_designated_port(struct net_bridge_port *p); 1386 1387void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1388int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1389int br_set_hello_time(struct net_bridge *br, unsigned long x); 1390int br_set_max_age(struct net_bridge *br, unsigned long x); 1391int __set_ageing_time(struct net_device *dev, unsigned long t); 1392int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1393 1394 1395/* br_stp_if.c */ 1396void br_stp_enable_bridge(struct net_bridge *br); 1397void br_stp_disable_bridge(struct net_bridge *br); 1398int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1399 struct netlink_ext_ack *extack); 1400void br_stp_enable_port(struct net_bridge_port *p); 1401void br_stp_disable_port(struct net_bridge_port *p); 1402bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1403void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1404void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1405int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1406int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1407ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1408 1409/* br_stp_bpdu.c */ 1410struct stp_proto; 1411void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1412 struct net_device *dev); 1413 1414/* br_stp_timer.c */ 1415void br_stp_timer_init(struct net_bridge *br); 1416void br_stp_port_timer_init(struct net_bridge_port *p); 1417unsigned long br_timer_value(const struct timer_list *timer); 1418 1419/* br.c */ 1420#if IS_ENABLED(CONFIG_ATM_LANE) 1421extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1422#endif 1423 1424/* br_mrp.c */ 1425#if IS_ENABLED(CONFIG_BRIDGE_MRP) 1426int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1427 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1428int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); 1429bool br_mrp_enabled(struct net_bridge *br); 1430void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1431int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1432#else 1433static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1434 struct nlattr *attr, int cmd, 1435 struct netlink_ext_ack *extack) 1436{ 1437 return -EOPNOTSUPP; 1438} 1439 1440static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) 1441{ 1442 return 0; 1443} 1444 1445static inline bool br_mrp_enabled(struct net_bridge *br) 1446{ 1447 return false; 1448} 1449 1450static inline void br_mrp_port_del(struct net_bridge *br, 1451 struct net_bridge_port *p) 1452{ 1453} 1454 1455static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1456{ 1457 return 0; 1458} 1459 1460#endif 1461 1462/* br_netlink.c */ 1463extern struct rtnl_link_ops br_link_ops; 1464int br_netlink_init(void); 1465void br_netlink_fini(void); 1466void br_ifinfo_notify(int event, const struct net_bridge *br, 1467 const struct net_bridge_port *port); 1468int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1469 struct netlink_ext_ack *extack); 1470int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1471int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1472 u32 filter_mask, int nlflags); 1473int br_process_vlan_info(struct net_bridge *br, 1474 struct net_bridge_port *p, int cmd, 1475 struct bridge_vlan_info *vinfo_curr, 1476 struct bridge_vlan_info **vinfo_last, 1477 bool *changed, 1478 struct netlink_ext_ack *extack); 1479 1480#ifdef CONFIG_SYSFS 1481/* br_sysfs_if.c */ 1482extern const struct sysfs_ops brport_sysfs_ops; 1483int br_sysfs_addif(struct net_bridge_port *p); 1484int br_sysfs_renameif(struct net_bridge_port *p); 1485 1486/* br_sysfs_br.c */ 1487int br_sysfs_addbr(struct net_device *dev); 1488void br_sysfs_delbr(struct net_device *dev); 1489 1490#else 1491 1492static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1493static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1494static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1495static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1496#endif /* CONFIG_SYSFS */ 1497 1498/* br_switchdev.c */ 1499#ifdef CONFIG_NET_SWITCHDEV 1500int nbp_switchdev_mark_set(struct net_bridge_port *p); 1501void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1502 struct sk_buff *skb); 1503bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1504 const struct sk_buff *skb); 1505int br_switchdev_set_port_flag(struct net_bridge_port *p, 1506 unsigned long flags, 1507 unsigned long mask); 1508void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1509 int type); 1510int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1511 struct netlink_ext_ack *extack); 1512int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1513 1514static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1515{ 1516 skb->offload_fwd_mark = 0; 1517} 1518#else 1519static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1520{ 1521 return 0; 1522} 1523 1524static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1525 struct sk_buff *skb) 1526{ 1527} 1528 1529static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1530 const struct sk_buff *skb) 1531{ 1532 return true; 1533} 1534 1535static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1536 unsigned long flags, 1537 unsigned long mask) 1538{ 1539 return 0; 1540} 1541 1542static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1543 u16 vid, u16 flags, 1544 struct netlink_ext_ack *extack) 1545{ 1546 return -EOPNOTSUPP; 1547} 1548 1549static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1550{ 1551 return -EOPNOTSUPP; 1552} 1553 1554static inline void 1555br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1556{ 1557} 1558 1559static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1560{ 1561} 1562#endif /* CONFIG_NET_SWITCHDEV */ 1563 1564/* br_arp_nd_proxy.c */ 1565void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1566void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1567 u16 vid, struct net_bridge_port *p); 1568void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1569 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1570struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1571#endif 1572