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