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