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 <net/pkt_cls.h> 19#include <linux/if_vlan.h> 20#include <linux/rhashtable.h> 21#include <linux/refcount.h> 22 23#define BR_HASH_BITS 8 24#define BR_HASH_SIZE (1 << BR_HASH_BITS) 25 26#define BR_HOLD_TIME (1*HZ) 27 28#define BR_PORT_BITS 10 29#define BR_MAX_PORTS (1<<BR_PORT_BITS) 30 31#define BR_MULTICAST_DEFAULT_HASH_MAX 4096 32#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 33#define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 34 35#define BR_HWDOM_MAX BITS_PER_LONG 36 37#define BR_VERSION "2.3" 38 39/* Control of forwarding link local multicast */ 40#define BR_GROUPFWD_DEFAULT 0 41/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 42enum { 43 BR_GROUPFWD_STP = BIT(0), 44 BR_GROUPFWD_MACPAUSE = BIT(1), 45 BR_GROUPFWD_LACP = BIT(2), 46}; 47 48#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 49 BR_GROUPFWD_LACP) 50/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 51#define BR_GROUPFWD_8021AD 0xB801u 52 53/* Path to usermode spanning tree program */ 54#define BR_STP_PROG "/sbin/bridge-stp" 55 56#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 57 58typedef struct bridge_id bridge_id; 59typedef struct mac_addr mac_addr; 60typedef __u16 port_id; 61 62struct bridge_id { 63 unsigned char prio[2]; 64 unsigned char addr[ETH_ALEN]; 65}; 66 67struct mac_addr { 68 unsigned char addr[ETH_ALEN]; 69}; 70 71#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 72/* our own querier */ 73struct bridge_mcast_own_query { 74 struct timer_list timer; 75 u32 startup_sent; 76}; 77 78/* other querier */ 79struct bridge_mcast_other_query { 80 struct timer_list timer; 81 struct timer_list delay_timer; 82}; 83 84/* selected querier */ 85struct bridge_mcast_querier { 86 struct br_ip addr; 87 int port_ifidx; 88 seqcount_spinlock_t seq; 89}; 90 91/* IGMP/MLD statistics */ 92struct bridge_mcast_stats { 93 struct br_mcast_stats mstats; 94 struct u64_stats_sync syncp; 95}; 96 97struct br_mdb_src_entry { 98 struct br_ip addr; 99}; 100 101struct br_mdb_config { 102 struct net_bridge *br; 103 struct net_bridge_port *p; 104 struct br_mdb_entry *entry; 105 struct br_ip group; 106 bool src_entry; 107 u8 filter_mode; 108 u16 nlflags; 109 struct br_mdb_src_entry *src_entries; 110 int num_src_entries; 111 u8 rt_protocol; 112}; 113#endif 114 115/* net_bridge_mcast_port must be always defined due to forwarding stubs */ 116struct net_bridge_mcast_port { 117#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 118 struct net_bridge_port *port; 119 struct net_bridge_vlan *vlan; 120 121 struct bridge_mcast_own_query ip4_own_query; 122 struct timer_list ip4_mc_router_timer; 123 struct hlist_node ip4_rlist; 124#if IS_ENABLED(CONFIG_IPV6) 125 struct bridge_mcast_own_query ip6_own_query; 126 struct timer_list ip6_mc_router_timer; 127 struct hlist_node ip6_rlist; 128#endif /* IS_ENABLED(CONFIG_IPV6) */ 129 unsigned char multicast_router; 130 u32 mdb_n_entries; 131 u32 mdb_max_entries; 132#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 133}; 134 135/* net_bridge_mcast must be always defined due to forwarding stubs */ 136struct net_bridge_mcast { 137#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 138 struct net_bridge *br; 139 struct net_bridge_vlan *vlan; 140 141 u32 multicast_last_member_count; 142 u32 multicast_startup_query_count; 143 144 u8 multicast_querier; 145 u8 multicast_igmp_version; 146 u8 multicast_router; 147#if IS_ENABLED(CONFIG_IPV6) 148 u8 multicast_mld_version; 149#endif 150 unsigned long multicast_last_member_interval; 151 unsigned long multicast_membership_interval; 152 unsigned long multicast_querier_interval; 153 unsigned long multicast_query_interval; 154 unsigned long multicast_query_response_interval; 155 unsigned long multicast_startup_query_interval; 156 struct hlist_head ip4_mc_router_list; 157 struct timer_list ip4_mc_router_timer; 158 struct bridge_mcast_other_query ip4_other_query; 159 struct bridge_mcast_own_query ip4_own_query; 160 struct bridge_mcast_querier ip4_querier; 161#if IS_ENABLED(CONFIG_IPV6) 162 struct hlist_head ip6_mc_router_list; 163 struct timer_list ip6_mc_router_timer; 164 struct bridge_mcast_other_query ip6_other_query; 165 struct bridge_mcast_own_query ip6_own_query; 166 struct bridge_mcast_querier ip6_querier; 167#endif /* IS_ENABLED(CONFIG_IPV6) */ 168#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 169}; 170 171struct br_tunnel_info { 172 __be64 tunnel_id; 173 struct metadata_dst __rcu *tunnel_dst; 174}; 175 176/* private vlan flags */ 177enum { 178 BR_VLFLAG_PER_PORT_STATS = BIT(0), 179 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 180 BR_VLFLAG_MCAST_ENABLED = BIT(2), 181 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 182 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4), 183}; 184 185/** 186 * struct net_bridge_vlan - per-vlan entry 187 * 188 * @vnode: rhashtable member 189 * @vid: VLAN id 190 * @flags: bridge vlan flags 191 * @priv_flags: private (in-kernel) bridge vlan flags 192 * @state: STP state (e.g. blocking, learning, forwarding) 193 * @stats: per-cpu VLAN statistics 194 * @br: if MASTER flag set, this points to a bridge struct 195 * @port: if MASTER flag unset, this points to a port struct 196 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 197 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 198 * for this VLAN entry 199 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 200 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 201 * context 202 * @msti: if MASTER flag set, this holds the VLANs MST instance 203 * @vlist: sorted list of VLAN entries 204 * @rcu: used for entry destruction 205 * 206 * This structure is shared between the global per-VLAN entries contained in 207 * the bridge rhashtable and the local per-port per-VLAN entries contained in 208 * the port's rhashtable. The union entries should be interpreted depending on 209 * the entry flags that are set. 210 */ 211struct net_bridge_vlan { 212 struct rhash_head vnode; 213 struct rhash_head tnode; 214 u16 vid; 215 u16 flags; 216 u16 priv_flags; 217 u8 state; 218 struct pcpu_sw_netstats __percpu *stats; 219 union { 220 struct net_bridge *br; 221 struct net_bridge_port *port; 222 }; 223 union { 224 refcount_t refcnt; 225 struct net_bridge_vlan *brvlan; 226 }; 227 228 struct br_tunnel_info tinfo; 229 230 union { 231 struct net_bridge_mcast br_mcast_ctx; 232 struct net_bridge_mcast_port port_mcast_ctx; 233 }; 234 235 u16 msti; 236 237 struct list_head vlist; 238 239 struct rcu_head rcu; 240}; 241 242/** 243 * struct net_bridge_vlan_group 244 * 245 * @vlan_hash: VLAN entry rhashtable 246 * @vlan_list: sorted VLAN entry list 247 * @num_vlans: number of total VLAN entries 248 * @pvid: PVID VLAN id 249 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 250 * 251 * IMPORTANT: Be careful when checking if there're VLAN entries using list 252 * primitives because the bridge can have entries in its list which 253 * are just for global context but not for filtering, i.e. they have 254 * the master flag set but not the brentry flag. If you have to check 255 * if there're "real" entries in the bridge please test @num_vlans 256 */ 257struct net_bridge_vlan_group { 258 struct rhashtable vlan_hash; 259 struct rhashtable tunnel_hash; 260 struct list_head vlan_list; 261 u16 num_vlans; 262 u16 pvid; 263 u8 pvid_state; 264}; 265 266/* bridge fdb flags */ 267enum { 268 BR_FDB_LOCAL, 269 BR_FDB_STATIC, 270 BR_FDB_STICKY, 271 BR_FDB_ADDED_BY_USER, 272 BR_FDB_ADDED_BY_EXT_LEARN, 273 BR_FDB_OFFLOADED, 274 BR_FDB_NOTIFY, 275 BR_FDB_NOTIFY_INACTIVE, 276 BR_FDB_LOCKED, 277}; 278 279struct net_bridge_fdb_key { 280 mac_addr addr; 281 u16 vlan_id; 282}; 283 284struct net_bridge_fdb_entry { 285 struct rhash_head rhnode; 286 struct net_bridge_port *dst; 287 288 struct net_bridge_fdb_key key; 289 struct hlist_node fdb_node; 290 unsigned long flags; 291 292 /* write-heavy members should not affect lookups */ 293 unsigned long updated ____cacheline_aligned_in_smp; 294 unsigned long used; 295 296 struct rcu_head rcu; 297}; 298 299struct net_bridge_fdb_flush_desc { 300 unsigned long flags; 301 unsigned long flags_mask; 302 int port_ifindex; 303 u16 vlan_id; 304}; 305 306#define MDB_PG_FLAGS_PERMANENT BIT(0) 307#define MDB_PG_FLAGS_OFFLOAD BIT(1) 308#define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 309#define MDB_PG_FLAGS_STAR_EXCL BIT(3) 310#define MDB_PG_FLAGS_BLOCKED BIT(4) 311 312#define PG_SRC_ENT_LIMIT 32 313 314#define BR_SGRP_F_DELETE BIT(0) 315#define BR_SGRP_F_SEND BIT(1) 316#define BR_SGRP_F_INSTALLED BIT(2) 317#define BR_SGRP_F_USER_ADDED BIT(3) 318 319struct net_bridge_mcast_gc { 320 struct hlist_node gc_node; 321 void (*destroy)(struct net_bridge_mcast_gc *gc); 322}; 323 324struct net_bridge_group_src { 325 struct hlist_node node; 326 327 struct br_ip addr; 328 struct net_bridge_port_group *pg; 329 u8 flags; 330 u8 src_query_rexmit_cnt; 331 struct timer_list timer; 332 333 struct net_bridge *br; 334 struct net_bridge_mcast_gc mcast_gc; 335 struct rcu_head rcu; 336}; 337 338struct net_bridge_port_group_sg_key { 339 struct net_bridge_port *port; 340 struct br_ip addr; 341}; 342 343struct net_bridge_port_group { 344 struct net_bridge_port_group __rcu *next; 345 struct net_bridge_port_group_sg_key key; 346 unsigned char eth_addr[ETH_ALEN] __aligned(2); 347 unsigned char flags; 348 unsigned char filter_mode; 349 unsigned char grp_query_rexmit_cnt; 350 unsigned char rt_protocol; 351 352 struct hlist_head src_list; 353 unsigned int src_ents; 354 struct timer_list timer; 355 struct timer_list rexmit_timer; 356 struct hlist_node mglist; 357 struct rb_root eht_set_tree; 358 struct rb_root eht_host_tree; 359 360 struct rhash_head rhnode; 361 struct net_bridge_mcast_gc mcast_gc; 362 struct rcu_head rcu; 363}; 364 365struct net_bridge_mdb_entry { 366 struct rhash_head rhnode; 367 struct net_bridge *br; 368 struct net_bridge_port_group __rcu *ports; 369 struct br_ip addr; 370 bool host_joined; 371 372 struct timer_list timer; 373 struct hlist_node mdb_node; 374 375 struct net_bridge_mcast_gc mcast_gc; 376 struct rcu_head rcu; 377}; 378 379struct net_bridge_port { 380 struct net_bridge *br; 381 struct net_device *dev; 382 netdevice_tracker dev_tracker; 383 struct list_head list; 384 385 unsigned long flags; 386#ifdef CONFIG_BRIDGE_VLAN_FILTERING 387 struct net_bridge_vlan_group __rcu *vlgrp; 388#endif 389 struct net_bridge_port __rcu *backup_port; 390 u32 backup_nhid; 391 392 /* STP */ 393 u8 priority; 394 u8 state; 395 u16 port_no; 396 unsigned char topology_change_ack; 397 unsigned char config_pending; 398 port_id port_id; 399 port_id designated_port; 400 bridge_id designated_root; 401 bridge_id designated_bridge; 402 u32 path_cost; 403 u32 designated_cost; 404 unsigned long designated_age; 405 406 struct timer_list forward_delay_timer; 407 struct timer_list hold_timer; 408 struct timer_list message_age_timer; 409 struct kobject kobj; 410 struct rcu_head rcu; 411 412 struct net_bridge_mcast_port multicast_ctx; 413 414#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 415 struct bridge_mcast_stats __percpu *mcast_stats; 416 417 u32 multicast_eht_hosts_limit; 418 u32 multicast_eht_hosts_cnt; 419 struct hlist_head mglist; 420#endif 421 422#ifdef CONFIG_SYSFS 423 char sysfs_name[IFNAMSIZ]; 424#endif 425 426#ifdef CONFIG_NET_POLL_CONTROLLER 427 struct netpoll *np; 428#endif 429#ifdef CONFIG_NET_SWITCHDEV 430 /* Identifier used to group ports that share the same switchdev 431 * hardware domain. 432 */ 433 int hwdom; 434 int offload_count; 435 struct netdev_phys_item_id ppid; 436#endif 437 u16 group_fwd_mask; 438 u16 backup_redirected_cnt; 439 440 struct bridge_stp_xstats stp_xstats; 441}; 442 443#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 444 445#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 446#define br_promisc_port(p) ((p)->flags & BR_PROMISC) 447 448static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 449{ 450 return rcu_dereference(dev->rx_handler_data); 451} 452 453static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 454{ 455 return netif_is_bridge_port(dev) ? 456 rtnl_dereference(dev->rx_handler_data) : NULL; 457} 458 459static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 460{ 461 return netif_is_bridge_port(dev) ? 462 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 463} 464 465enum net_bridge_opts { 466 BROPT_VLAN_ENABLED, 467 BROPT_VLAN_STATS_ENABLED, 468 BROPT_NF_CALL_IPTABLES, 469 BROPT_NF_CALL_IP6TABLES, 470 BROPT_NF_CALL_ARPTABLES, 471 BROPT_GROUP_ADDR_SET, 472 BROPT_MULTICAST_ENABLED, 473 BROPT_MULTICAST_QUERY_USE_IFADDR, 474 BROPT_MULTICAST_STATS_ENABLED, 475 BROPT_HAS_IPV6_ADDR, 476 BROPT_NEIGH_SUPPRESS_ENABLED, 477 BROPT_MTU_SET_BY_USER, 478 BROPT_VLAN_STATS_PER_PORT, 479 BROPT_NO_LL_LEARN, 480 BROPT_VLAN_BRIDGE_BINDING, 481 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 482 BROPT_MST_ENABLED, 483}; 484 485struct net_bridge { 486 spinlock_t lock; 487 spinlock_t hash_lock; 488 struct hlist_head frame_type_list; 489 struct net_device *dev; 490 unsigned long options; 491 /* These fields are accessed on each packet */ 492#ifdef CONFIG_BRIDGE_VLAN_FILTERING 493 __be16 vlan_proto; 494 u16 default_pvid; 495 struct net_bridge_vlan_group __rcu *vlgrp; 496#endif 497 498 struct rhashtable fdb_hash_tbl; 499 struct list_head port_list; 500#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 501 union { 502 struct rtable fake_rtable; 503 struct rt6_info fake_rt6_info; 504 }; 505#endif 506 u16 group_fwd_mask; 507 u16 group_fwd_mask_required; 508 509 /* STP */ 510 bridge_id designated_root; 511 bridge_id bridge_id; 512 unsigned char topology_change; 513 unsigned char topology_change_detected; 514 u16 root_port; 515 unsigned long max_age; 516 unsigned long hello_time; 517 unsigned long forward_delay; 518 unsigned long ageing_time; 519 unsigned long bridge_max_age; 520 unsigned long bridge_hello_time; 521 unsigned long bridge_forward_delay; 522 unsigned long bridge_ageing_time; 523 u32 root_path_cost; 524 525 u8 group_addr[ETH_ALEN]; 526 527 enum { 528 BR_NO_STP, /* no spanning tree */ 529 BR_KERNEL_STP, /* old STP in kernel */ 530 BR_USER_STP, /* new RSTP in userspace */ 531 } stp_enabled; 532 533 struct net_bridge_mcast multicast_ctx; 534 535#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 536 struct bridge_mcast_stats __percpu *mcast_stats; 537 538 u32 hash_max; 539 540 spinlock_t multicast_lock; 541 542 struct rhashtable mdb_hash_tbl; 543 struct rhashtable sg_port_tbl; 544 545 struct hlist_head mcast_gc_list; 546 struct hlist_head mdb_list; 547 548 struct work_struct mcast_gc_work; 549#endif 550 551 struct timer_list hello_timer; 552 struct timer_list tcn_timer; 553 struct timer_list topology_change_timer; 554 struct delayed_work gc_work; 555 struct kobject *ifobj; 556 u32 auto_cnt; 557 558#ifdef CONFIG_NET_SWITCHDEV 559 /* Counter used to make sure that hardware domains get unique 560 * identifiers in case a bridge spans multiple switchdev instances. 561 */ 562 int last_hwdom; 563 /* Bit mask of hardware domain numbers in use */ 564 unsigned long busy_hwdoms; 565#endif 566 struct hlist_head fdb_list; 567 568#if IS_ENABLED(CONFIG_BRIDGE_MRP) 569 struct hlist_head mrp_list; 570#endif 571#if IS_ENABLED(CONFIG_BRIDGE_CFM) 572 struct hlist_head mep_list; 573#endif 574}; 575 576struct br_input_skb_cb { 577 struct net_device *brdev; 578 579 u16 frag_max_size; 580#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 581 u8 igmp; 582 u8 mrouters_only:1; 583#endif 584 u8 proxyarp_replied:1; 585 u8 src_port_isolated:1; 586#ifdef CONFIG_BRIDGE_VLAN_FILTERING 587 u8 vlan_filtered:1; 588#endif 589#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 590 u8 br_netfilter_broute:1; 591#endif 592 593#ifdef CONFIG_NET_SWITCHDEV 594 /* Set if TX data plane offloading is used towards at least one 595 * hardware domain. 596 */ 597 u8 tx_fwd_offload:1; 598 /* The switchdev hardware domain from which this packet was received. 599 * If skb->offload_fwd_mark was set, then this packet was already 600 * forwarded by hardware to the other ports in the source hardware 601 * domain, otherwise it wasn't. 602 */ 603 int src_hwdom; 604 /* Bit mask of hardware domains towards this packet has already been 605 * transmitted using the TX data plane offload. 606 */ 607 unsigned long fwd_hwdoms; 608#endif 609 610 u32 backup_nhid; 611}; 612 613#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 614 615#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 616# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 617#else 618# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 619#endif 620 621#define br_printk(level, br, format, args...) \ 622 printk(level "%s: " format, (br)->dev->name, ##args) 623 624#define br_err(__br, format, args...) \ 625 br_printk(KERN_ERR, __br, format, ##args) 626#define br_warn(__br, format, args...) \ 627 br_printk(KERN_WARNING, __br, format, ##args) 628#define br_notice(__br, format, args...) \ 629 br_printk(KERN_NOTICE, __br, format, ##args) 630#define br_info(__br, format, args...) \ 631 br_printk(KERN_INFO, __br, format, ##args) 632 633#define br_debug(br, format, args...) \ 634 pr_debug("%s: " format, (br)->dev->name, ##args) 635 636/* called under bridge lock */ 637static inline int br_is_root_bridge(const struct net_bridge *br) 638{ 639 return !memcmp(&br->bridge_id, &br->designated_root, 8); 640} 641 642/* check if a VLAN entry is global */ 643static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 644{ 645 return v->flags & BRIDGE_VLAN_INFO_MASTER; 646} 647 648/* check if a VLAN entry is used by the bridge */ 649static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 650{ 651 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 652} 653 654/* check if we should use the vlan entry, returns false if it's only context */ 655static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 656{ 657 if (br_vlan_is_master(v)) { 658 if (br_vlan_is_brentry(v)) 659 return true; 660 else 661 return false; 662 } 663 664 return true; 665} 666 667static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 668{ 669 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 670} 671 672static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 673{ 674 bool ret = vid > 0 && vid < VLAN_VID_MASK; 675 676 if (!ret) 677 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 678 679 return ret; 680} 681 682static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 683 const struct bridge_vlan_info *last, 684 struct netlink_ext_ack *extack) 685{ 686 /* pvid flag is not allowed in ranges */ 687 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 688 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 689 return false; 690 } 691 692 /* when cur is the range end, check if: 693 * - it has range start flag 694 * - range ids are invalid (end is equal to or before start) 695 */ 696 if (last) { 697 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 698 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 699 return false; 700 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 701 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 702 return false; 703 } else if (cur->vid <= last->vid) { 704 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 705 return false; 706 } 707 } 708 709 /* check for required range flags */ 710 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 711 BRIDGE_VLAN_INFO_RANGE_END))) { 712 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 713 return false; 714 } 715 716 return true; 717} 718 719static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 720{ 721 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 722 723#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 724 if (!br_vlan_is_master(v)) 725 mcast_router = v->port_mcast_ctx.multicast_router; 726 else 727 mcast_router = v->br_mcast_ctx.multicast_router; 728#endif 729 730 return mcast_router; 731} 732 733static inline int br_afspec_cmd_to_rtm(int cmd) 734{ 735 switch (cmd) { 736 case RTM_SETLINK: 737 return RTM_NEWVLAN; 738 case RTM_DELLINK: 739 return RTM_DELVLAN; 740 } 741 742 return 0; 743} 744 745static inline int br_opt_get(const struct net_bridge *br, 746 enum net_bridge_opts opt) 747{ 748 return test_bit(opt, &br->options); 749} 750 751int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 752 struct netlink_ext_ack *extack); 753int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 754int br_boolopt_multi_toggle(struct net_bridge *br, 755 struct br_boolopt_multi *bm, 756 struct netlink_ext_ack *extack); 757void br_boolopt_multi_get(const struct net_bridge *br, 758 struct br_boolopt_multi *bm); 759void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 760 761#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 762static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 763{ 764 struct tc_skb_ext *ext; 765 766 if (!tc_skb_ext_tc_enabled()) 767 return; 768 769 ext = skb_ext_find(skb, TC_SKB_EXT); 770 if (ext) { 771 ext->l2_miss = miss; 772 return; 773 } 774 if (!miss) 775 return; 776 ext = tc_skb_ext_alloc(skb); 777 if (!ext) 778 return; 779 ext->l2_miss = true; 780} 781#else 782static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 783{ 784} 785#endif 786 787/* br_device.c */ 788void br_dev_setup(struct net_device *dev); 789void br_dev_delete(struct net_device *dev, struct list_head *list); 790netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 791#ifdef CONFIG_NET_POLL_CONTROLLER 792static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 793 struct sk_buff *skb) 794{ 795 netpoll_send_skb(p->np, skb); 796} 797 798int br_netpoll_enable(struct net_bridge_port *p); 799void br_netpoll_disable(struct net_bridge_port *p); 800#else 801static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 802 struct sk_buff *skb) 803{ 804} 805 806static inline int br_netpoll_enable(struct net_bridge_port *p) 807{ 808 return 0; 809} 810 811static inline void br_netpoll_disable(struct net_bridge_port *p) 812{ 813} 814#endif 815 816/* br_fdb.c */ 817#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 818#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 819#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 820 NTF_STICKY | NTF_OFFLOADED) 821 822int br_fdb_init(void); 823void br_fdb_fini(void); 824int br_fdb_hash_init(struct net_bridge *br); 825void br_fdb_hash_fini(struct net_bridge *br); 826void br_fdb_flush(struct net_bridge *br, 827 const struct net_bridge_fdb_flush_desc *desc); 828void br_fdb_find_delete_local(struct net_bridge *br, 829 const struct net_bridge_port *p, 830 const unsigned char *addr, u16 vid); 831void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 832void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 833void br_fdb_cleanup(struct work_struct *work); 834void br_fdb_delete_by_port(struct net_bridge *br, 835 const struct net_bridge_port *p, u16 vid, int do_all); 836struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 837 const unsigned char *addr, 838 __u16 vid); 839int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 840int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 841 unsigned long off); 842int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 843 const unsigned char *addr, u16 vid); 844void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 845 const unsigned char *addr, u16 vid, unsigned long flags); 846 847int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 848 struct net_device *dev, const unsigned char *addr, u16 vid, 849 struct netlink_ext_ack *extack); 850int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], 851 struct net_device *dev, u16 vid, 852 struct netlink_ext_ack *extack); 853int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 854 const unsigned char *addr, u16 vid, u16 nlh_flags, 855 struct netlink_ext_ack *extack); 856int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 857 struct net_device *dev, struct net_device *fdev, int *idx); 858int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 859 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 860 struct netlink_ext_ack *extack); 861int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 862void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 863int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 864 const unsigned char *addr, u16 vid, 865 bool locked, bool swdev_notify); 866int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 867 const unsigned char *addr, u16 vid, 868 bool swdev_notify); 869void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 870 const unsigned char *addr, u16 vid, bool offloaded); 871 872/* br_forward.c */ 873enum br_pkt_type { 874 BR_PKT_UNICAST, 875 BR_PKT_MULTICAST, 876 BR_PKT_BROADCAST 877}; 878int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 879void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 880 bool local_rcv, bool local_orig); 881int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 882void br_flood(struct net_bridge *br, struct sk_buff *skb, 883 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig, 884 u16 vid); 885 886/* return true if both source port and dest port are isolated */ 887static inline bool br_skb_isolated(const struct net_bridge_port *to, 888 const struct sk_buff *skb) 889{ 890 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 891 (to->flags & BR_ISOLATED); 892} 893 894/* br_if.c */ 895void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 896int br_add_bridge(struct net *net, const char *name); 897int br_del_bridge(struct net *net, const char *name); 898int br_add_if(struct net_bridge *br, struct net_device *dev, 899 struct netlink_ext_ack *extack); 900int br_del_if(struct net_bridge *br, struct net_device *dev); 901void br_mtu_auto_adjust(struct net_bridge *br); 902netdev_features_t br_features_recompute(struct net_bridge *br, 903 netdev_features_t features); 904void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 905void br_manage_promisc(struct net_bridge *br); 906int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 907 908/* br_input.c */ 909int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 910rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 911 912struct br_frame_type { 913 __be16 type; 914 int (*frame_handler)(struct net_bridge_port *port, 915 struct sk_buff *skb); 916 struct hlist_node list; 917}; 918 919void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 920void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 921 922static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 923{ 924 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 925} 926 927static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 928{ 929 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 930} 931 932static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 933{ 934 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 935} 936 937static inline struct net_bridge_port * 938br_port_get_check_rtnl(const struct net_device *dev) 939{ 940 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 941} 942 943/* br_ioctl.c */ 944int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 945 void __user *data, int cmd); 946int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 947 struct ifreq *ifr, void __user *uarg); 948 949/* br_multicast.c */ 950#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 951int br_multicast_rcv(struct net_bridge_mcast **brmctx, 952 struct net_bridge_mcast_port **pmctx, 953 struct net_bridge_vlan *vlan, 954 struct sk_buff *skb, u16 vid); 955struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 956 struct sk_buff *skb, u16 vid); 957int br_multicast_add_port(struct net_bridge_port *port); 958void br_multicast_del_port(struct net_bridge_port *port); 959void br_multicast_enable_port(struct net_bridge_port *port); 960void br_multicast_disable_port(struct net_bridge_port *port); 961void br_multicast_init(struct net_bridge *br); 962void br_multicast_join_snoopers(struct net_bridge *br); 963void br_multicast_leave_snoopers(struct net_bridge *br); 964void br_multicast_open(struct net_bridge *br); 965void br_multicast_stop(struct net_bridge *br); 966void br_multicast_dev_del(struct net_bridge *br); 967void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 968 struct net_bridge_mcast *brmctx, 969 bool local_rcv, bool local_orig); 970int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 971int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 972 unsigned long val); 973int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 974int br_multicast_toggle(struct net_bridge *br, unsigned long val, 975 struct netlink_ext_ack *extack); 976int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 977int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 978 unsigned long val); 979#if IS_ENABLED(CONFIG_IPV6) 980int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 981 unsigned long val); 982#endif 983struct net_bridge_mdb_entry * 984br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 985struct net_bridge_mdb_entry * 986br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 987struct net_bridge_port_group * 988br_multicast_new_port_group(struct net_bridge_port *port, 989 const struct br_ip *group, 990 struct net_bridge_port_group __rcu *next, 991 unsigned char flags, const unsigned char *src, 992 u8 filter_mode, u8 rt_protocol, 993 struct netlink_ext_ack *extack); 994void br_multicast_del_port_group(struct net_bridge_port_group *p); 995int br_mdb_hash_init(struct net_bridge *br); 996void br_mdb_hash_fini(struct net_bridge *br); 997void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 998 struct net_bridge_port_group *pg, int type); 999void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 1000 int type); 1001void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 1002 struct net_bridge_port_group *pg, 1003 struct net_bridge_port_group __rcu **pp); 1004void br_multicast_count(struct net_bridge *br, 1005 const struct net_bridge_port *p, 1006 const struct sk_buff *skb, u8 type, u8 dir); 1007int br_multicast_init_stats(struct net_bridge *br); 1008void br_multicast_uninit_stats(struct net_bridge *br); 1009void br_multicast_get_stats(const struct net_bridge *br, 1010 const struct net_bridge_port *p, 1011 struct br_mcast_stats *dest); 1012u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 1013void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 1014u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 1015int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 1016 struct netlink_ext_ack *extack); 1017int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1018 struct netlink_ext_ack *extack); 1019int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1020 struct netlink_callback *cb); 1021void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 1022 struct net_bridge_mdb_entry *mp, bool notify); 1023void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 1024void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 1025 u8 filter_mode); 1026void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 1027 struct net_bridge_port_group *sg); 1028struct net_bridge_group_src * 1029br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1030struct net_bridge_group_src * 1031br_multicast_new_group_src(struct net_bridge_port_group *pg, 1032 struct br_ip *src_ip); 1033void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1034void br_multicast_del_group_src(struct net_bridge_group_src *src, 1035 bool fastleave); 1036void br_multicast_ctx_init(struct net_bridge *br, 1037 struct net_bridge_vlan *vlan, 1038 struct net_bridge_mcast *brmctx); 1039void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1040void br_multicast_port_ctx_init(struct net_bridge_port *port, 1041 struct net_bridge_vlan *vlan, 1042 struct net_bridge_mcast_port *pmctx); 1043void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1044void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1045int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1046 struct netlink_ext_ack *extack); 1047bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1048 1049int br_rports_fill_info(struct sk_buff *skb, 1050 const struct net_bridge_mcast *brmctx); 1051int br_multicast_dump_querier_state(struct sk_buff *skb, 1052 const struct net_bridge_mcast *brmctx, 1053 int nest_attr); 1054size_t br_multicast_querier_state_size(void); 1055size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1056void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1057 unsigned long val); 1058void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1059 unsigned long val); 1060 1061static inline bool br_group_is_l2(const struct br_ip *group) 1062{ 1063 return group->proto == 0; 1064} 1065 1066#define mlock_dereference(X, br) \ 1067 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1068 1069static inline struct hlist_node * 1070br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1071 struct sk_buff *skb) 1072{ 1073#if IS_ENABLED(CONFIG_IPV6) 1074 if (skb->protocol == htons(ETH_P_IPV6)) 1075 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1076#endif 1077 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1078} 1079 1080static inline struct net_bridge_port * 1081br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1082{ 1083 struct net_bridge_mcast_port *mctx; 1084 1085#if IS_ENABLED(CONFIG_IPV6) 1086 if (skb->protocol == htons(ETH_P_IPV6)) 1087 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1088 ip6_rlist); 1089 else 1090#endif 1091 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1092 ip4_rlist); 1093 1094 if (mctx) 1095 return mctx->port; 1096 else 1097 return NULL; 1098} 1099 1100static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1101{ 1102 return timer_pending(&brmctx->ip4_mc_router_timer); 1103} 1104 1105static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1106{ 1107#if IS_ENABLED(CONFIG_IPV6) 1108 return timer_pending(&brmctx->ip6_mc_router_timer); 1109#else 1110 return false; 1111#endif 1112} 1113 1114static inline bool 1115br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1116{ 1117 switch (brmctx->multicast_router) { 1118 case MDB_RTR_TYPE_PERM: 1119 return true; 1120 case MDB_RTR_TYPE_TEMP_QUERY: 1121 if (skb) { 1122 if (skb->protocol == htons(ETH_P_IP)) 1123 return br_ip4_multicast_is_router(brmctx); 1124 else if (skb->protocol == htons(ETH_P_IPV6)) 1125 return br_ip6_multicast_is_router(brmctx); 1126 } else { 1127 return br_ip4_multicast_is_router(brmctx) || 1128 br_ip6_multicast_is_router(brmctx); 1129 } 1130 fallthrough; 1131 default: 1132 return false; 1133 } 1134} 1135 1136static inline bool 1137__br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1138 struct bridge_mcast_other_query *querier, 1139 const bool is_ipv6) 1140{ 1141 bool own_querier_enabled; 1142 1143 if (brmctx->multicast_querier) { 1144 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1145 own_querier_enabled = false; 1146 else 1147 own_querier_enabled = true; 1148 } else { 1149 own_querier_enabled = false; 1150 } 1151 1152 return !timer_pending(&querier->delay_timer) && 1153 (own_querier_enabled || timer_pending(&querier->timer)); 1154} 1155 1156static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1157 struct ethhdr *eth, 1158 const struct net_bridge_mdb_entry *mdb) 1159{ 1160 switch (eth->h_proto) { 1161 case (htons(ETH_P_IP)): 1162 return __br_multicast_querier_exists(brmctx, 1163 &brmctx->ip4_other_query, false); 1164#if IS_ENABLED(CONFIG_IPV6) 1165 case (htons(ETH_P_IPV6)): 1166 return __br_multicast_querier_exists(brmctx, 1167 &brmctx->ip6_other_query, true); 1168#endif 1169 default: 1170 return !!mdb && br_group_is_l2(&mdb->addr); 1171 } 1172} 1173 1174static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1175{ 1176 switch (ip->proto) { 1177 case htons(ETH_P_IP): 1178 return ipv4_is_zeronet(ip->src.ip4); 1179#if IS_ENABLED(CONFIG_IPV6) 1180 case htons(ETH_P_IPV6): 1181 return ipv6_addr_any(&ip->src.ip6); 1182#endif 1183 default: 1184 return false; 1185 } 1186} 1187 1188static inline bool 1189br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1190 __be16 proto) 1191{ 1192 switch (proto) { 1193 case htons(ETH_P_IP): 1194 return !!(brmctx->multicast_igmp_version == 3); 1195#if IS_ENABLED(CONFIG_IPV6) 1196 case htons(ETH_P_IPV6): 1197 return !!(brmctx->multicast_mld_version == 2); 1198#endif 1199 default: 1200 return false; 1201 } 1202} 1203 1204static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1205{ 1206 return BR_INPUT_SKB_CB(skb)->igmp; 1207} 1208 1209static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1210{ 1211 return brmctx->multicast_last_member_interval * 1212 brmctx->multicast_last_member_count; 1213} 1214 1215static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1216{ 1217 return brmctx->multicast_membership_interval; 1218} 1219 1220static inline bool 1221br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1222{ 1223 return !!brmctx->vlan; 1224} 1225 1226static inline bool 1227br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1228{ 1229 return !!pmctx->vlan; 1230} 1231 1232static inline struct net_bridge_mcast * 1233br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1234{ 1235 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1236 return &pmctx->port->br->multicast_ctx; 1237 else 1238 return &pmctx->vlan->brvlan->br_mcast_ctx; 1239} 1240 1241static inline bool 1242br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1243{ 1244 return br_multicast_ctx_is_vlan(brmctx) && 1245 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1246 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1247} 1248 1249static inline bool 1250br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1251{ 1252 return br_multicast_ctx_is_vlan(brmctx) && 1253 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1254} 1255 1256static inline bool 1257br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1258{ 1259 return br_multicast_port_ctx_is_vlan(pmctx) && 1260 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1261} 1262 1263static inline bool 1264br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1265{ 1266 return pmctx->port->state == BR_STATE_DISABLED || 1267 (br_multicast_port_ctx_is_vlan(pmctx) && 1268 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1269 pmctx->vlan->state == BR_STATE_DISABLED)); 1270} 1271 1272static inline bool 1273br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1274{ 1275 return br_multicast_port_ctx_state_disabled(pmctx) || 1276 pmctx->port->state == BR_STATE_BLOCKING || 1277 (br_multicast_port_ctx_is_vlan(pmctx) && 1278 pmctx->vlan->state == BR_STATE_BLOCKING); 1279} 1280 1281static inline bool 1282br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1283{ 1284#if IS_ENABLED(CONFIG_IPV6) 1285 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1286 !hlist_empty(&brmctx->ip6_mc_router_list); 1287#else 1288 return !hlist_empty(&brmctx->ip4_mc_router_list); 1289#endif 1290} 1291 1292static inline bool 1293br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1294 const struct net_bridge_mcast *brmctx2) 1295{ 1296 return brmctx1->multicast_igmp_version == 1297 brmctx2->multicast_igmp_version && 1298 brmctx1->multicast_last_member_count == 1299 brmctx2->multicast_last_member_count && 1300 brmctx1->multicast_startup_query_count == 1301 brmctx2->multicast_startup_query_count && 1302 brmctx1->multicast_last_member_interval == 1303 brmctx2->multicast_last_member_interval && 1304 brmctx1->multicast_membership_interval == 1305 brmctx2->multicast_membership_interval && 1306 brmctx1->multicast_querier_interval == 1307 brmctx2->multicast_querier_interval && 1308 brmctx1->multicast_query_interval == 1309 brmctx2->multicast_query_interval && 1310 brmctx1->multicast_query_response_interval == 1311 brmctx2->multicast_query_response_interval && 1312 brmctx1->multicast_startup_query_interval == 1313 brmctx2->multicast_startup_query_interval && 1314 brmctx1->multicast_querier == brmctx2->multicast_querier && 1315 brmctx1->multicast_router == brmctx2->multicast_router && 1316 !br_rports_have_mc_router(brmctx1) && 1317 !br_rports_have_mc_router(brmctx2) && 1318#if IS_ENABLED(CONFIG_IPV6) 1319 brmctx1->multicast_mld_version == 1320 brmctx2->multicast_mld_version && 1321#endif 1322 true; 1323} 1324 1325static inline bool 1326br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1327{ 1328 bool vlan_snooping_enabled; 1329 1330 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1331 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1332 1333 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1334} 1335#else 1336static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1337 struct net_bridge_mcast_port **pmctx, 1338 struct net_bridge_vlan *vlan, 1339 struct sk_buff *skb, 1340 u16 vid) 1341{ 1342 return 0; 1343} 1344 1345static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1346 struct sk_buff *skb, u16 vid) 1347{ 1348 return NULL; 1349} 1350 1351static inline int br_multicast_add_port(struct net_bridge_port *port) 1352{ 1353 return 0; 1354} 1355 1356static inline void br_multicast_del_port(struct net_bridge_port *port) 1357{ 1358} 1359 1360static inline void br_multicast_enable_port(struct net_bridge_port *port) 1361{ 1362} 1363 1364static inline void br_multicast_disable_port(struct net_bridge_port *port) 1365{ 1366} 1367 1368static inline void br_multicast_init(struct net_bridge *br) 1369{ 1370} 1371 1372static inline void br_multicast_join_snoopers(struct net_bridge *br) 1373{ 1374} 1375 1376static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1377{ 1378} 1379 1380static inline void br_multicast_open(struct net_bridge *br) 1381{ 1382} 1383 1384static inline void br_multicast_stop(struct net_bridge *br) 1385{ 1386} 1387 1388static inline void br_multicast_dev_del(struct net_bridge *br) 1389{ 1390} 1391 1392static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1393 struct sk_buff *skb, 1394 struct net_bridge_mcast *brmctx, 1395 bool local_rcv, bool local_orig) 1396{ 1397} 1398 1399static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1400 struct sk_buff *skb) 1401{ 1402 return false; 1403} 1404 1405static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1406 struct ethhdr *eth, 1407 const struct net_bridge_mdb_entry *mdb) 1408{ 1409 return false; 1410} 1411 1412static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1413 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1414{ 1415 return -EOPNOTSUPP; 1416} 1417 1418static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1419 struct netlink_ext_ack *extack) 1420{ 1421 return -EOPNOTSUPP; 1422} 1423 1424static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1425 struct netlink_callback *cb) 1426{ 1427 return 0; 1428} 1429 1430static inline int br_mdb_hash_init(struct net_bridge *br) 1431{ 1432 return 0; 1433} 1434 1435static inline void br_mdb_hash_fini(struct net_bridge *br) 1436{ 1437} 1438 1439static inline void br_multicast_count(struct net_bridge *br, 1440 const struct net_bridge_port *p, 1441 const struct sk_buff *skb, 1442 u8 type, u8 dir) 1443{ 1444} 1445 1446static inline int br_multicast_init_stats(struct net_bridge *br) 1447{ 1448 return 0; 1449} 1450 1451static inline void br_multicast_uninit_stats(struct net_bridge *br) 1452{ 1453} 1454 1455static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1456{ 1457 return 0; 1458} 1459 1460static inline void br_multicast_ctx_init(struct net_bridge *br, 1461 struct net_bridge_vlan *vlan, 1462 struct net_bridge_mcast *brmctx) 1463{ 1464} 1465 1466static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1467{ 1468} 1469 1470static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1471 struct net_bridge_vlan *vlan, 1472 struct net_bridge_mcast_port *pmctx) 1473{ 1474} 1475 1476static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1477{ 1478} 1479 1480static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1481 bool on) 1482{ 1483} 1484 1485static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1486 bool on, 1487 struct netlink_ext_ack *extack) 1488{ 1489 return -EOPNOTSUPP; 1490} 1491 1492static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1493 bool on) 1494{ 1495 return false; 1496} 1497 1498static inline bool 1499br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1500 const struct net_bridge_mcast *brmctx2) 1501{ 1502 return true; 1503} 1504#endif 1505 1506/* br_vlan.c */ 1507#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1508bool br_allowed_ingress(const struct net_bridge *br, 1509 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1510 u16 *vid, u8 *state, 1511 struct net_bridge_vlan **vlan); 1512bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1513 const struct sk_buff *skb); 1514bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1515struct sk_buff *br_handle_vlan(struct net_bridge *br, 1516 const struct net_bridge_port *port, 1517 struct net_bridge_vlan_group *vg, 1518 struct sk_buff *skb); 1519int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1520 bool *changed, struct netlink_ext_ack *extack); 1521int br_vlan_delete(struct net_bridge *br, u16 vid); 1522void br_vlan_flush(struct net_bridge *br); 1523struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1524void br_recalculate_fwd_mask(struct net_bridge *br); 1525int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1526 struct netlink_ext_ack *extack); 1527int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1528 struct netlink_ext_ack *extack); 1529int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1530 struct netlink_ext_ack *extack); 1531int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1532int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1533int br_vlan_init(struct net_bridge *br); 1534int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1535 struct netlink_ext_ack *extack); 1536int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1537 struct netlink_ext_ack *extack); 1538int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1539 bool *changed, struct netlink_ext_ack *extack); 1540int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1541void nbp_vlan_flush(struct net_bridge_port *port); 1542int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1543int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1544void br_vlan_get_stats(const struct net_bridge_vlan *v, 1545 struct pcpu_sw_netstats *stats); 1546void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1547int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1548 void *ptr); 1549void br_vlan_rtnl_init(void); 1550void br_vlan_rtnl_uninit(void); 1551void br_vlan_notify(const struct net_bridge *br, 1552 const struct net_bridge_port *p, 1553 u16 vid, u16 vid_range, 1554 int cmd); 1555bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1556 const struct net_bridge_vlan *range_end); 1557 1558void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1559 struct net_device_path_ctx *ctx, 1560 struct net_device_path *path); 1561int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1562 struct net_bridge_port *dst, 1563 struct net_device_path *path); 1564 1565static inline struct net_bridge_vlan_group *br_vlan_group( 1566 const struct net_bridge *br) 1567{ 1568 return rtnl_dereference(br->vlgrp); 1569} 1570 1571static inline struct net_bridge_vlan_group *nbp_vlan_group( 1572 const struct net_bridge_port *p) 1573{ 1574 return rtnl_dereference(p->vlgrp); 1575} 1576 1577static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1578 const struct net_bridge *br) 1579{ 1580 return rcu_dereference(br->vlgrp); 1581} 1582 1583static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1584 const struct net_bridge_port *p) 1585{ 1586 return rcu_dereference(p->vlgrp); 1587} 1588 1589/* Since bridge now depends on 8021Q module, but the time bridge sees the 1590 * skb, the vlan tag will always be present if the frame was tagged. 1591 */ 1592static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1593{ 1594 int err = 0; 1595 1596 if (skb_vlan_tag_present(skb)) { 1597 *vid = skb_vlan_tag_get_id(skb); 1598 } else { 1599 *vid = 0; 1600 err = -EINVAL; 1601 } 1602 1603 return err; 1604} 1605 1606static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1607{ 1608 if (!vg) 1609 return 0; 1610 1611 smp_rmb(); 1612 return vg->pvid; 1613} 1614 1615static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1616{ 1617 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1618} 1619#else 1620static inline bool br_allowed_ingress(const struct net_bridge *br, 1621 struct net_bridge_vlan_group *vg, 1622 struct sk_buff *skb, 1623 u16 *vid, u8 *state, 1624 struct net_bridge_vlan **vlan) 1625 1626{ 1627 *vlan = NULL; 1628 return true; 1629} 1630 1631static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1632 const struct sk_buff *skb) 1633{ 1634 return true; 1635} 1636 1637static inline bool br_should_learn(struct net_bridge_port *p, 1638 struct sk_buff *skb, u16 *vid) 1639{ 1640 return true; 1641} 1642 1643static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1644 const struct net_bridge_port *port, 1645 struct net_bridge_vlan_group *vg, 1646 struct sk_buff *skb) 1647{ 1648 return skb; 1649} 1650 1651static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1652 bool *changed, struct netlink_ext_ack *extack) 1653{ 1654 *changed = false; 1655 return -EOPNOTSUPP; 1656} 1657 1658static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1659{ 1660 return -EOPNOTSUPP; 1661} 1662 1663static inline void br_vlan_flush(struct net_bridge *br) 1664{ 1665} 1666 1667static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1668{ 1669} 1670 1671static inline int br_vlan_init(struct net_bridge *br) 1672{ 1673 return 0; 1674} 1675 1676static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1677 bool *changed, struct netlink_ext_ack *extack) 1678{ 1679 *changed = false; 1680 return -EOPNOTSUPP; 1681} 1682 1683static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1684{ 1685 return -EOPNOTSUPP; 1686} 1687 1688static inline void nbp_vlan_flush(struct net_bridge_port *port) 1689{ 1690} 1691 1692static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1693 u16 vid) 1694{ 1695 return NULL; 1696} 1697 1698static inline int nbp_vlan_init(struct net_bridge_port *port, 1699 struct netlink_ext_ack *extack) 1700{ 1701 return 0; 1702} 1703 1704static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1705{ 1706 return 0; 1707} 1708 1709static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1710{ 1711 return 0; 1712} 1713 1714static inline int br_vlan_filter_toggle(struct net_bridge *br, 1715 unsigned long val, 1716 struct netlink_ext_ack *extack) 1717{ 1718 return -EOPNOTSUPP; 1719} 1720 1721static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1722 u32 filter_mask) 1723{ 1724 return 0; 1725} 1726 1727static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1728 struct net_device_path_ctx *ctx, 1729 struct net_device_path *path) 1730{ 1731} 1732 1733static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1734 struct net_bridge_port *dst, 1735 struct net_device_path *path) 1736{ 1737 return 0; 1738} 1739 1740static inline struct net_bridge_vlan_group *br_vlan_group( 1741 const struct net_bridge *br) 1742{ 1743 return NULL; 1744} 1745 1746static inline struct net_bridge_vlan_group *nbp_vlan_group( 1747 const struct net_bridge_port *p) 1748{ 1749 return NULL; 1750} 1751 1752static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1753 const struct net_bridge *br) 1754{ 1755 return NULL; 1756} 1757 1758static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1759 const struct net_bridge_port *p) 1760{ 1761 return NULL; 1762} 1763 1764static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1765 struct pcpu_sw_netstats *stats) 1766{ 1767} 1768 1769static inline void br_vlan_port_event(struct net_bridge_port *p, 1770 unsigned long event) 1771{ 1772} 1773 1774static inline int br_vlan_bridge_event(struct net_device *dev, 1775 unsigned long event, void *ptr) 1776{ 1777 return 0; 1778} 1779 1780static inline void br_vlan_rtnl_init(void) 1781{ 1782} 1783 1784static inline void br_vlan_rtnl_uninit(void) 1785{ 1786} 1787 1788static inline void br_vlan_notify(const struct net_bridge *br, 1789 const struct net_bridge_port *p, 1790 u16 vid, u16 vid_range, 1791 int cmd) 1792{ 1793} 1794 1795static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1796 const struct net_bridge_vlan *range_end) 1797{ 1798 return true; 1799} 1800 1801static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1802{ 1803 return 0; 1804} 1805 1806#endif 1807 1808/* br_vlan_options.c */ 1809#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1810bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1811 const struct net_bridge_vlan *range_end); 1812bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1813 const struct net_bridge_port *p); 1814size_t br_vlan_opts_nl_size(void); 1815int br_vlan_process_options(const struct net_bridge *br, 1816 const struct net_bridge_port *p, 1817 struct net_bridge_vlan *range_start, 1818 struct net_bridge_vlan *range_end, 1819 struct nlattr **tb, 1820 struct netlink_ext_ack *extack); 1821int br_vlan_rtm_process_global_options(struct net_device *dev, 1822 const struct nlattr *attr, 1823 int cmd, 1824 struct netlink_ext_ack *extack); 1825bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1826 const struct net_bridge_vlan *r_end); 1827bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1828 const struct net_bridge_vlan *v_opts); 1829 1830/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1831static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1832{ 1833 return READ_ONCE(v->state); 1834} 1835 1836static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1837{ 1838 WRITE_ONCE(v->state, state); 1839} 1840 1841static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1842{ 1843 return READ_ONCE(vg->pvid_state); 1844} 1845 1846static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1847 u8 state) 1848{ 1849 WRITE_ONCE(vg->pvid_state, state); 1850} 1851 1852/* learn_allow is true at ingress and false at egress */ 1853static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1854{ 1855 switch (state) { 1856 case BR_STATE_LEARNING: 1857 return learn_allow; 1858 case BR_STATE_FORWARDING: 1859 return true; 1860 default: 1861 return false; 1862 } 1863} 1864#endif 1865 1866/* br_mst.c */ 1867#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1868DECLARE_STATIC_KEY_FALSE(br_mst_used); 1869static inline bool br_mst_is_enabled(struct net_bridge *br) 1870{ 1871 return static_branch_unlikely(&br_mst_used) && 1872 br_opt_get(br, BROPT_MST_ENABLED); 1873} 1874 1875int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1876 struct netlink_ext_ack *extack); 1877int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1878void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1879int br_mst_set_enabled(struct net_bridge *br, bool on, 1880 struct netlink_ext_ack *extack); 1881size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1882int br_mst_fill_info(struct sk_buff *skb, 1883 const struct net_bridge_vlan_group *vg); 1884int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1885 struct netlink_ext_ack *extack); 1886#else 1887static inline bool br_mst_is_enabled(struct net_bridge *br) 1888{ 1889 return false; 1890} 1891 1892static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1893 u8 state, struct netlink_ext_ack *extack) 1894{ 1895 return -EOPNOTSUPP; 1896} 1897 1898static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1899 struct netlink_ext_ack *extack) 1900{ 1901 return -EOPNOTSUPP; 1902} 1903 1904static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1905{ 1906 return 0; 1907} 1908 1909static inline int br_mst_fill_info(struct sk_buff *skb, 1910 const struct net_bridge_vlan_group *vg) 1911{ 1912 return -EOPNOTSUPP; 1913} 1914 1915static inline int br_mst_process(struct net_bridge_port *p, 1916 const struct nlattr *mst_attr, 1917 struct netlink_ext_ack *extack) 1918{ 1919 return -EOPNOTSUPP; 1920} 1921#endif 1922 1923struct nf_br_ops { 1924 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1925}; 1926extern const struct nf_br_ops __rcu *nf_br_ops; 1927 1928/* br_netfilter.c */ 1929#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1930int br_nf_core_init(void); 1931void br_nf_core_fini(void); 1932void br_netfilter_rtable_init(struct net_bridge *); 1933#else 1934static inline int br_nf_core_init(void) { return 0; } 1935static inline void br_nf_core_fini(void) {} 1936#define br_netfilter_rtable_init(x) 1937#endif 1938 1939/* br_stp.c */ 1940void br_set_state(struct net_bridge_port *p, unsigned int state); 1941struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1942void br_init_port(struct net_bridge_port *p); 1943void br_become_designated_port(struct net_bridge_port *p); 1944 1945void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1946int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1947int br_set_hello_time(struct net_bridge *br, unsigned long x); 1948int br_set_max_age(struct net_bridge *br, unsigned long x); 1949int __set_ageing_time(struct net_device *dev, unsigned long t); 1950int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1951 1952 1953/* br_stp_if.c */ 1954void br_stp_enable_bridge(struct net_bridge *br); 1955void br_stp_disable_bridge(struct net_bridge *br); 1956int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1957 struct netlink_ext_ack *extack); 1958void br_stp_enable_port(struct net_bridge_port *p); 1959void br_stp_disable_port(struct net_bridge_port *p); 1960bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1961void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1962void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1963int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1964int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1965ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1966 1967/* br_stp_bpdu.c */ 1968struct stp_proto; 1969void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1970 struct net_device *dev); 1971 1972/* br_stp_timer.c */ 1973void br_stp_timer_init(struct net_bridge *br); 1974void br_stp_port_timer_init(struct net_bridge_port *p); 1975unsigned long br_timer_value(const struct timer_list *timer); 1976 1977/* br.c */ 1978#if IS_ENABLED(CONFIG_ATM_LANE) 1979extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1980#endif 1981 1982/* br_mrp.c */ 1983#if IS_ENABLED(CONFIG_BRIDGE_MRP) 1984int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1985 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1986bool br_mrp_enabled(struct net_bridge *br); 1987void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1988int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1989#else 1990static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1991 struct nlattr *attr, int cmd, 1992 struct netlink_ext_ack *extack) 1993{ 1994 return -EOPNOTSUPP; 1995} 1996 1997static inline bool br_mrp_enabled(struct net_bridge *br) 1998{ 1999 return false; 2000} 2001 2002static inline void br_mrp_port_del(struct net_bridge *br, 2003 struct net_bridge_port *p) 2004{ 2005} 2006 2007static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 2008{ 2009 return 0; 2010} 2011 2012#endif 2013 2014/* br_cfm.c */ 2015#if IS_ENABLED(CONFIG_BRIDGE_CFM) 2016int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2017 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2018bool br_cfm_created(struct net_bridge *br); 2019void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 2020int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 2021int br_cfm_status_fill_info(struct sk_buff *skb, 2022 struct net_bridge *br, 2023 bool getlink); 2024int br_cfm_mep_count(struct net_bridge *br, u32 *count); 2025int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 2026#else 2027static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2028 struct nlattr *attr, int cmd, 2029 struct netlink_ext_ack *extack) 2030{ 2031 return -EOPNOTSUPP; 2032} 2033 2034static inline bool br_cfm_created(struct net_bridge *br) 2035{ 2036 return false; 2037} 2038 2039static inline void br_cfm_port_del(struct net_bridge *br, 2040 struct net_bridge_port *p) 2041{ 2042} 2043 2044static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2045{ 2046 return -EOPNOTSUPP; 2047} 2048 2049static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2050 struct net_bridge *br, 2051 bool getlink) 2052{ 2053 return -EOPNOTSUPP; 2054} 2055 2056static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2057{ 2058 *count = 0; 2059 return -EOPNOTSUPP; 2060} 2061 2062static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2063{ 2064 *count = 0; 2065 return -EOPNOTSUPP; 2066} 2067#endif 2068 2069/* br_netlink.c */ 2070extern struct rtnl_link_ops br_link_ops; 2071int br_netlink_init(void); 2072void br_netlink_fini(void); 2073void br_ifinfo_notify(int event, const struct net_bridge *br, 2074 const struct net_bridge_port *port); 2075void br_info_notify(int event, const struct net_bridge *br, 2076 const struct net_bridge_port *port, u32 filter); 2077int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2078 struct netlink_ext_ack *extack); 2079int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2080int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2081 u32 filter_mask, int nlflags); 2082int br_process_vlan_info(struct net_bridge *br, 2083 struct net_bridge_port *p, int cmd, 2084 struct bridge_vlan_info *vinfo_curr, 2085 struct bridge_vlan_info **vinfo_last, 2086 bool *changed, 2087 struct netlink_ext_ack *extack); 2088 2089#ifdef CONFIG_SYSFS 2090/* br_sysfs_if.c */ 2091extern const struct sysfs_ops brport_sysfs_ops; 2092int br_sysfs_addif(struct net_bridge_port *p); 2093int br_sysfs_renameif(struct net_bridge_port *p); 2094 2095/* br_sysfs_br.c */ 2096int br_sysfs_addbr(struct net_device *dev); 2097void br_sysfs_delbr(struct net_device *dev); 2098 2099#else 2100 2101static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2102static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2103static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2104static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2105#endif /* CONFIG_SYSFS */ 2106 2107/* br_switchdev.c */ 2108#ifdef CONFIG_NET_SWITCHDEV 2109int br_switchdev_port_offload(struct net_bridge_port *p, 2110 struct net_device *dev, const void *ctx, 2111 struct notifier_block *atomic_nb, 2112 struct notifier_block *blocking_nb, 2113 bool tx_fwd_offload, 2114 struct netlink_ext_ack *extack); 2115 2116void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2117 struct notifier_block *atomic_nb, 2118 struct notifier_block *blocking_nb); 2119 2120int br_switchdev_port_replay(struct net_bridge_port *p, 2121 struct net_device *dev, const void *ctx, 2122 struct notifier_block *atomic_nb, 2123 struct notifier_block *blocking_nb, 2124 struct netlink_ext_ack *extack); 2125 2126bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2127 2128void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2129 2130void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2131 struct sk_buff *skb); 2132void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2133 struct sk_buff *skb); 2134void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2135 struct sk_buff *skb); 2136bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2137 const struct sk_buff *skb); 2138int br_switchdev_set_port_flag(struct net_bridge_port *p, 2139 unsigned long flags, 2140 unsigned long mask, 2141 struct netlink_ext_ack *extack); 2142void br_switchdev_fdb_notify(struct net_bridge *br, 2143 const struct net_bridge_fdb_entry *fdb, int type); 2144void br_switchdev_mdb_notify(struct net_device *dev, 2145 struct net_bridge_mdb_entry *mp, 2146 struct net_bridge_port_group *pg, 2147 int type); 2148int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2149 bool changed, struct netlink_ext_ack *extack); 2150int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2151void br_switchdev_init(struct net_bridge *br); 2152 2153static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2154{ 2155 skb->offload_fwd_mark = 0; 2156} 2157#else 2158static inline int 2159br_switchdev_port_offload(struct net_bridge_port *p, 2160 struct net_device *dev, const void *ctx, 2161 struct notifier_block *atomic_nb, 2162 struct notifier_block *blocking_nb, 2163 bool tx_fwd_offload, 2164 struct netlink_ext_ack *extack) 2165{ 2166 return -EOPNOTSUPP; 2167} 2168 2169static inline void 2170br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2171 struct notifier_block *atomic_nb, 2172 struct notifier_block *blocking_nb) 2173{ 2174} 2175 2176static inline int 2177br_switchdev_port_replay(struct net_bridge_port *p, 2178 struct net_device *dev, const void *ctx, 2179 struct notifier_block *atomic_nb, 2180 struct notifier_block *blocking_nb, 2181 struct netlink_ext_ack *extack) 2182{ 2183 return -EOPNOTSUPP; 2184} 2185 2186static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2187{ 2188 return false; 2189} 2190 2191static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2192{ 2193} 2194 2195static inline void 2196nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2197 struct sk_buff *skb) 2198{ 2199} 2200 2201static inline void 2202nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2203 struct sk_buff *skb) 2204{ 2205} 2206 2207static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2208 struct sk_buff *skb) 2209{ 2210} 2211 2212static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2213 const struct sk_buff *skb) 2214{ 2215 return true; 2216} 2217 2218static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2219 unsigned long flags, 2220 unsigned long mask, 2221 struct netlink_ext_ack *extack) 2222{ 2223 return 0; 2224} 2225 2226static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2227 u16 flags, bool changed, 2228 struct netlink_ext_ack *extack) 2229{ 2230 return -EOPNOTSUPP; 2231} 2232 2233static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2234{ 2235 return -EOPNOTSUPP; 2236} 2237 2238static inline void 2239br_switchdev_fdb_notify(struct net_bridge *br, 2240 const struct net_bridge_fdb_entry *fdb, int type) 2241{ 2242} 2243 2244static inline void br_switchdev_mdb_notify(struct net_device *dev, 2245 struct net_bridge_mdb_entry *mp, 2246 struct net_bridge_port_group *pg, 2247 int type) 2248{ 2249} 2250 2251static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2252{ 2253} 2254 2255static inline void br_switchdev_init(struct net_bridge *br) 2256{ 2257} 2258 2259#endif /* CONFIG_NET_SWITCHDEV */ 2260 2261/* br_arp_nd_proxy.c */ 2262void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2263void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2264 u16 vid, struct net_bridge_port *p); 2265void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2266 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2267struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2268bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid); 2269#endif 2270