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 * @tnode: rhashtable member 190 * @vid: VLAN id 191 * @flags: bridge vlan flags 192 * @priv_flags: private (in-kernel) bridge vlan flags 193 * @state: STP state (e.g. blocking, learning, forwarding) 194 * @stats: per-cpu VLAN statistics 195 * @br: if MASTER flag set, this points to a bridge struct 196 * @port: if MASTER flag unset, this points to a port struct 197 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 198 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 199 * for this VLAN entry 200 * @tinfo: bridge tunnel info 201 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 202 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 203 * context 204 * @msti: if MASTER flag set, this holds the VLANs MST instance 205 * @vlist: sorted list of VLAN entries 206 * @rcu: used for entry destruction 207 * 208 * This structure is shared between the global per-VLAN entries contained in 209 * the bridge rhashtable and the local per-port per-VLAN entries contained in 210 * the port's rhashtable. The union entries should be interpreted depending on 211 * the entry flags that are set. 212 */ 213struct net_bridge_vlan { 214 struct rhash_head vnode; 215 struct rhash_head tnode; 216 u16 vid; 217 u16 flags; 218 u16 priv_flags; 219 u8 state; 220 struct pcpu_sw_netstats __percpu *stats; 221 union { 222 struct net_bridge *br; 223 struct net_bridge_port *port; 224 }; 225 union { 226 refcount_t refcnt; 227 struct net_bridge_vlan *brvlan; 228 }; 229 230 struct br_tunnel_info tinfo; 231 232 union { 233 struct net_bridge_mcast br_mcast_ctx; 234 struct net_bridge_mcast_port port_mcast_ctx; 235 }; 236 237 u16 msti; 238 239 struct list_head vlist; 240 241 struct rcu_head rcu; 242}; 243 244/** 245 * struct net_bridge_vlan_group 246 * 247 * @vlan_hash: VLAN entry rhashtable 248 * @vlan_list: sorted VLAN entry list 249 * @num_vlans: number of total VLAN entries 250 * @pvid: PVID VLAN id 251 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 252 * 253 * IMPORTANT: Be careful when checking if there're VLAN entries using list 254 * primitives because the bridge can have entries in its list which 255 * are just for global context but not for filtering, i.e. they have 256 * the master flag set but not the brentry flag. If you have to check 257 * if there're "real" entries in the bridge please test @num_vlans 258 */ 259struct net_bridge_vlan_group { 260 struct rhashtable vlan_hash; 261 struct rhashtable tunnel_hash; 262 struct list_head vlan_list; 263 u16 num_vlans; 264 u16 pvid; 265 u8 pvid_state; 266}; 267 268/* bridge fdb flags */ 269enum { 270 BR_FDB_LOCAL, 271 BR_FDB_STATIC, 272 BR_FDB_STICKY, 273 BR_FDB_ADDED_BY_USER, 274 BR_FDB_ADDED_BY_EXT_LEARN, 275 BR_FDB_OFFLOADED, 276 BR_FDB_NOTIFY, 277 BR_FDB_NOTIFY_INACTIVE, 278 BR_FDB_LOCKED, 279 BR_FDB_DYNAMIC_LEARNED, 280}; 281 282struct net_bridge_fdb_key { 283 mac_addr addr; 284 u16 vlan_id; 285}; 286 287struct net_bridge_fdb_entry { 288 struct rhash_head rhnode; 289 struct net_bridge_port *dst; 290 291 struct net_bridge_fdb_key key; 292 struct hlist_node fdb_node; 293 unsigned long flags; 294 295 /* write-heavy members should not affect lookups */ 296 unsigned long updated ____cacheline_aligned_in_smp; 297 unsigned long used; 298 299 struct rcu_head rcu; 300}; 301 302struct net_bridge_fdb_flush_desc { 303 unsigned long flags; 304 unsigned long flags_mask; 305 int port_ifindex; 306 u16 vlan_id; 307}; 308 309#define MDB_PG_FLAGS_PERMANENT BIT(0) 310#define MDB_PG_FLAGS_OFFLOAD BIT(1) 311#define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 312#define MDB_PG_FLAGS_STAR_EXCL BIT(3) 313#define MDB_PG_FLAGS_BLOCKED BIT(4) 314 315#define PG_SRC_ENT_LIMIT 32 316 317#define BR_SGRP_F_DELETE BIT(0) 318#define BR_SGRP_F_SEND BIT(1) 319#define BR_SGRP_F_INSTALLED BIT(2) 320#define BR_SGRP_F_USER_ADDED BIT(3) 321 322struct net_bridge_mcast_gc { 323 struct hlist_node gc_node; 324 void (*destroy)(struct net_bridge_mcast_gc *gc); 325}; 326 327struct net_bridge_group_src { 328 struct hlist_node node; 329 330 struct br_ip addr; 331 struct net_bridge_port_group *pg; 332 u8 flags; 333 u8 src_query_rexmit_cnt; 334 struct timer_list timer; 335 336 struct net_bridge *br; 337 struct net_bridge_mcast_gc mcast_gc; 338 struct rcu_head rcu; 339}; 340 341struct net_bridge_port_group_sg_key { 342 struct net_bridge_port *port; 343 struct br_ip addr; 344}; 345 346struct net_bridge_port_group { 347 struct net_bridge_port_group __rcu *next; 348 struct net_bridge_port_group_sg_key key; 349 unsigned char eth_addr[ETH_ALEN] __aligned(2); 350 unsigned char flags; 351 unsigned char filter_mode; 352 unsigned char grp_query_rexmit_cnt; 353 unsigned char rt_protocol; 354 355 struct hlist_head src_list; 356 unsigned int src_ents; 357 struct timer_list timer; 358 struct timer_list rexmit_timer; 359 struct hlist_node mglist; 360 struct rb_root eht_set_tree; 361 struct rb_root eht_host_tree; 362 363 struct rhash_head rhnode; 364 struct net_bridge_mcast_gc mcast_gc; 365 struct rcu_head rcu; 366}; 367 368struct net_bridge_mdb_entry { 369 struct rhash_head rhnode; 370 struct net_bridge *br; 371 struct net_bridge_port_group __rcu *ports; 372 struct br_ip addr; 373 bool host_joined; 374 375 struct timer_list timer; 376 struct hlist_node mdb_node; 377 378 struct net_bridge_mcast_gc mcast_gc; 379 struct rcu_head rcu; 380}; 381 382struct net_bridge_port { 383 struct net_bridge *br; 384 struct net_device *dev; 385 netdevice_tracker dev_tracker; 386 struct list_head list; 387 388 unsigned long flags; 389#ifdef CONFIG_BRIDGE_VLAN_FILTERING 390 struct net_bridge_vlan_group __rcu *vlgrp; 391#endif 392 struct net_bridge_port __rcu *backup_port; 393 u32 backup_nhid; 394 395 /* STP */ 396 u8 priority; 397 u8 state; 398 u16 port_no; 399 unsigned char topology_change_ack; 400 unsigned char config_pending; 401 port_id port_id; 402 port_id designated_port; 403 bridge_id designated_root; 404 bridge_id designated_bridge; 405 u32 path_cost; 406 u32 designated_cost; 407 unsigned long designated_age; 408 409 struct timer_list forward_delay_timer; 410 struct timer_list hold_timer; 411 struct timer_list message_age_timer; 412 struct kobject kobj; 413 struct rcu_head rcu; 414 415 struct net_bridge_mcast_port multicast_ctx; 416 417#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 418 struct bridge_mcast_stats __percpu *mcast_stats; 419 420 u32 multicast_eht_hosts_limit; 421 u32 multicast_eht_hosts_cnt; 422 struct hlist_head mglist; 423#endif 424 425#ifdef CONFIG_SYSFS 426 char sysfs_name[IFNAMSIZ]; 427#endif 428 429#ifdef CONFIG_NET_POLL_CONTROLLER 430 struct netpoll *np; 431#endif 432#ifdef CONFIG_NET_SWITCHDEV 433 /* Identifier used to group ports that share the same switchdev 434 * hardware domain. 435 */ 436 int hwdom; 437 int offload_count; 438 struct netdev_phys_item_id ppid; 439#endif 440 u16 group_fwd_mask; 441 u16 backup_redirected_cnt; 442 443 struct bridge_stp_xstats stp_xstats; 444}; 445 446#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 447 448#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 449#define br_promisc_port(p) ((p)->flags & BR_PROMISC) 450 451static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 452{ 453 return rcu_dereference(dev->rx_handler_data); 454} 455 456static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 457{ 458 return netif_is_bridge_port(dev) ? 459 rtnl_dereference(dev->rx_handler_data) : NULL; 460} 461 462static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 463{ 464 return netif_is_bridge_port(dev) ? 465 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 466} 467 468enum net_bridge_opts { 469 BROPT_VLAN_ENABLED, 470 BROPT_VLAN_STATS_ENABLED, 471 BROPT_NF_CALL_IPTABLES, 472 BROPT_NF_CALL_IP6TABLES, 473 BROPT_NF_CALL_ARPTABLES, 474 BROPT_GROUP_ADDR_SET, 475 BROPT_MULTICAST_ENABLED, 476 BROPT_MULTICAST_QUERY_USE_IFADDR, 477 BROPT_MULTICAST_STATS_ENABLED, 478 BROPT_HAS_IPV6_ADDR, 479 BROPT_NEIGH_SUPPRESS_ENABLED, 480 BROPT_MTU_SET_BY_USER, 481 BROPT_VLAN_STATS_PER_PORT, 482 BROPT_NO_LL_LEARN, 483 BROPT_VLAN_BRIDGE_BINDING, 484 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 485 BROPT_MST_ENABLED, 486}; 487 488struct net_bridge { 489 spinlock_t lock; 490 spinlock_t hash_lock; 491 struct hlist_head frame_type_list; 492 struct net_device *dev; 493 unsigned long options; 494 /* These fields are accessed on each packet */ 495#ifdef CONFIG_BRIDGE_VLAN_FILTERING 496 __be16 vlan_proto; 497 u16 default_pvid; 498 struct net_bridge_vlan_group __rcu *vlgrp; 499#endif 500 501 struct rhashtable fdb_hash_tbl; 502 struct list_head port_list; 503#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 504 union { 505 struct rtable fake_rtable; 506 struct rt6_info fake_rt6_info; 507 }; 508#endif 509 u16 group_fwd_mask; 510 u16 group_fwd_mask_required; 511 512 /* STP */ 513 bridge_id designated_root; 514 bridge_id bridge_id; 515 unsigned char topology_change; 516 unsigned char topology_change_detected; 517 u16 root_port; 518 unsigned long max_age; 519 unsigned long hello_time; 520 unsigned long forward_delay; 521 unsigned long ageing_time; 522 unsigned long bridge_max_age; 523 unsigned long bridge_hello_time; 524 unsigned long bridge_forward_delay; 525 unsigned long bridge_ageing_time; 526 u32 root_path_cost; 527 528 u8 group_addr[ETH_ALEN]; 529 530 enum { 531 BR_NO_STP, /* no spanning tree */ 532 BR_KERNEL_STP, /* old STP in kernel */ 533 BR_USER_STP, /* new RSTP in userspace */ 534 } stp_enabled; 535 536 struct net_bridge_mcast multicast_ctx; 537 538#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 539 struct bridge_mcast_stats __percpu *mcast_stats; 540 541 u32 hash_max; 542 543 spinlock_t multicast_lock; 544 545 struct rhashtable mdb_hash_tbl; 546 struct rhashtable sg_port_tbl; 547 548 struct hlist_head mcast_gc_list; 549 struct hlist_head mdb_list; 550 551 struct work_struct mcast_gc_work; 552#endif 553 554 struct timer_list hello_timer; 555 struct timer_list tcn_timer; 556 struct timer_list topology_change_timer; 557 struct delayed_work gc_work; 558 struct kobject *ifobj; 559 u32 auto_cnt; 560 561 atomic_t fdb_n_learned; 562 u32 fdb_max_learned; 563 564#ifdef CONFIG_NET_SWITCHDEV 565 /* Counter used to make sure that hardware domains get unique 566 * identifiers in case a bridge spans multiple switchdev instances. 567 */ 568 int last_hwdom; 569 /* Bit mask of hardware domain numbers in use */ 570 unsigned long busy_hwdoms; 571#endif 572 struct hlist_head fdb_list; 573 574#if IS_ENABLED(CONFIG_BRIDGE_MRP) 575 struct hlist_head mrp_list; 576#endif 577#if IS_ENABLED(CONFIG_BRIDGE_CFM) 578 struct hlist_head mep_list; 579#endif 580}; 581 582struct br_input_skb_cb { 583 struct net_device *brdev; 584 585 u16 frag_max_size; 586#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 587 u8 igmp; 588 u8 mrouters_only:1; 589#endif 590 u8 proxyarp_replied:1; 591 u8 src_port_isolated:1; 592 u8 promisc:1; 593#ifdef CONFIG_BRIDGE_VLAN_FILTERING 594 u8 vlan_filtered:1; 595#endif 596#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 597 u8 br_netfilter_broute:1; 598#endif 599 600#ifdef CONFIG_NET_SWITCHDEV 601 /* Set if TX data plane offloading is used towards at least one 602 * hardware domain. 603 */ 604 u8 tx_fwd_offload:1; 605 /* The switchdev hardware domain from which this packet was received. 606 * If skb->offload_fwd_mark was set, then this packet was already 607 * forwarded by hardware to the other ports in the source hardware 608 * domain, otherwise it wasn't. 609 */ 610 int src_hwdom; 611 /* Bit mask of hardware domains towards this packet has already been 612 * transmitted using the TX data plane offload. 613 */ 614 unsigned long fwd_hwdoms; 615#endif 616 617 u32 backup_nhid; 618}; 619 620#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 621 622#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 623# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 624#else 625# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 626#endif 627 628#define br_printk(level, br, format, args...) \ 629 printk(level "%s: " format, (br)->dev->name, ##args) 630 631#define br_err(__br, format, args...) \ 632 br_printk(KERN_ERR, __br, format, ##args) 633#define br_warn(__br, format, args...) \ 634 br_printk(KERN_WARNING, __br, format, ##args) 635#define br_notice(__br, format, args...) \ 636 br_printk(KERN_NOTICE, __br, format, ##args) 637#define br_info(__br, format, args...) \ 638 br_printk(KERN_INFO, __br, format, ##args) 639 640#define br_debug(br, format, args...) \ 641 pr_debug("%s: " format, (br)->dev->name, ##args) 642 643/* called under bridge lock */ 644static inline int br_is_root_bridge(const struct net_bridge *br) 645{ 646 return !memcmp(&br->bridge_id, &br->designated_root, 8); 647} 648 649/* check if a VLAN entry is global */ 650static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 651{ 652 return v->flags & BRIDGE_VLAN_INFO_MASTER; 653} 654 655/* check if a VLAN entry is used by the bridge */ 656static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 657{ 658 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 659} 660 661/* check if we should use the vlan entry, returns false if it's only context */ 662static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 663{ 664 if (br_vlan_is_master(v)) { 665 if (br_vlan_is_brentry(v)) 666 return true; 667 else 668 return false; 669 } 670 671 return true; 672} 673 674static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 675{ 676 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 677} 678 679static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 680{ 681 bool ret = vid > 0 && vid < VLAN_VID_MASK; 682 683 if (!ret) 684 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 685 686 return ret; 687} 688 689static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 690 const struct bridge_vlan_info *last, 691 struct netlink_ext_ack *extack) 692{ 693 /* pvid flag is not allowed in ranges */ 694 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 695 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 696 return false; 697 } 698 699 /* when cur is the range end, check if: 700 * - it has range start flag 701 * - range ids are invalid (end is equal to or before start) 702 */ 703 if (last) { 704 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 705 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 706 return false; 707 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 708 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 709 return false; 710 } else if (cur->vid <= last->vid) { 711 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 712 return false; 713 } 714 } 715 716 /* check for required range flags */ 717 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 718 BRIDGE_VLAN_INFO_RANGE_END))) { 719 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 720 return false; 721 } 722 723 return true; 724} 725 726static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 727{ 728 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 729 730#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 731 if (!br_vlan_is_master(v)) 732 mcast_router = v->port_mcast_ctx.multicast_router; 733 else 734 mcast_router = v->br_mcast_ctx.multicast_router; 735#endif 736 737 return mcast_router; 738} 739 740static inline int br_afspec_cmd_to_rtm(int cmd) 741{ 742 switch (cmd) { 743 case RTM_SETLINK: 744 return RTM_NEWVLAN; 745 case RTM_DELLINK: 746 return RTM_DELVLAN; 747 } 748 749 return 0; 750} 751 752static inline int br_opt_get(const struct net_bridge *br, 753 enum net_bridge_opts opt) 754{ 755 return test_bit(opt, &br->options); 756} 757 758int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 759 struct netlink_ext_ack *extack); 760int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 761int br_boolopt_multi_toggle(struct net_bridge *br, 762 struct br_boolopt_multi *bm, 763 struct netlink_ext_ack *extack); 764void br_boolopt_multi_get(const struct net_bridge *br, 765 struct br_boolopt_multi *bm); 766void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 767 768#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 769static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 770{ 771 struct tc_skb_ext *ext; 772 773 if (!tc_skb_ext_tc_enabled()) 774 return; 775 776 ext = skb_ext_find(skb, TC_SKB_EXT); 777 if (ext) { 778 ext->l2_miss = miss; 779 return; 780 } 781 if (!miss) 782 return; 783 ext = tc_skb_ext_alloc(skb); 784 if (!ext) 785 return; 786 ext->l2_miss = true; 787} 788#else 789static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 790{ 791} 792#endif 793 794/* br_device.c */ 795void br_dev_setup(struct net_device *dev); 796void br_dev_delete(struct net_device *dev, struct list_head *list); 797netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 798#ifdef CONFIG_NET_POLL_CONTROLLER 799static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 800 struct sk_buff *skb) 801{ 802 netpoll_send_skb(p->np, skb); 803} 804 805int br_netpoll_enable(struct net_bridge_port *p); 806void br_netpoll_disable(struct net_bridge_port *p); 807#else 808static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 809 struct sk_buff *skb) 810{ 811} 812 813static inline int br_netpoll_enable(struct net_bridge_port *p) 814{ 815 return 0; 816} 817 818static inline void br_netpoll_disable(struct net_bridge_port *p) 819{ 820} 821#endif 822 823/* br_fdb.c */ 824#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 825#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 826#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 827 NTF_STICKY | NTF_OFFLOADED) 828 829int br_fdb_init(void); 830void br_fdb_fini(void); 831int br_fdb_hash_init(struct net_bridge *br); 832void br_fdb_hash_fini(struct net_bridge *br); 833void br_fdb_flush(struct net_bridge *br, 834 const struct net_bridge_fdb_flush_desc *desc); 835void br_fdb_find_delete_local(struct net_bridge *br, 836 const struct net_bridge_port *p, 837 const unsigned char *addr, u16 vid); 838void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 839void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 840void br_fdb_cleanup(struct work_struct *work); 841void br_fdb_delete_by_port(struct net_bridge *br, 842 const struct net_bridge_port *p, u16 vid, int do_all); 843struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 844 const unsigned char *addr, 845 __u16 vid); 846int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 847int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 848 unsigned long off); 849int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 850 const unsigned char *addr, u16 vid); 851void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 852 const unsigned char *addr, u16 vid, unsigned long flags); 853 854int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 855 struct net_device *dev, const unsigned char *addr, u16 vid, 856 struct netlink_ext_ack *extack); 857int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev, 858 struct netlink_ext_ack *extack); 859int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 860 const unsigned char *addr, u16 vid, u16 nlh_flags, 861 struct netlink_ext_ack *extack); 862int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 863 struct net_device *dev, struct net_device *fdev, int *idx); 864int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 865 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 866 struct netlink_ext_ack *extack); 867int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 868void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 869int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 870 const unsigned char *addr, u16 vid, 871 bool locked, bool swdev_notify); 872int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 873 const unsigned char *addr, u16 vid, 874 bool swdev_notify); 875void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 876 const unsigned char *addr, u16 vid, bool offloaded); 877 878/* br_forward.c */ 879enum br_pkt_type { 880 BR_PKT_UNICAST, 881 BR_PKT_MULTICAST, 882 BR_PKT_BROADCAST 883}; 884int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 885void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 886 bool local_rcv, bool local_orig); 887int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 888void br_flood(struct net_bridge *br, struct sk_buff *skb, 889 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig, 890 u16 vid); 891 892/* return true if both source port and dest port are isolated */ 893static inline bool br_skb_isolated(const struct net_bridge_port *to, 894 const struct sk_buff *skb) 895{ 896 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 897 (to->flags & BR_ISOLATED); 898} 899 900/* br_if.c */ 901void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 902int br_add_bridge(struct net *net, const char *name); 903int br_del_bridge(struct net *net, const char *name); 904int br_add_if(struct net_bridge *br, struct net_device *dev, 905 struct netlink_ext_ack *extack); 906int br_del_if(struct net_bridge *br, struct net_device *dev); 907void br_mtu_auto_adjust(struct net_bridge *br); 908netdev_features_t br_features_recompute(struct net_bridge *br, 909 netdev_features_t features); 910void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 911void br_manage_promisc(struct net_bridge *br); 912int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 913 914/* br_input.c */ 915int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 916rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 917 918struct br_frame_type { 919 __be16 type; 920 int (*frame_handler)(struct net_bridge_port *port, 921 struct sk_buff *skb); 922 struct hlist_node list; 923}; 924 925void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 926void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 927 928static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 929{ 930 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 931} 932 933static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 934{ 935 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 936} 937 938static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 939{ 940 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 941} 942 943static inline struct net_bridge_port * 944br_port_get_check_rtnl(const struct net_device *dev) 945{ 946 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 947} 948 949/* br_ioctl.c */ 950int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 951 void __user *data, int cmd); 952int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 953 struct ifreq *ifr, void __user *uarg); 954 955/* br_multicast.c */ 956#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 957int br_multicast_rcv(struct net_bridge_mcast **brmctx, 958 struct net_bridge_mcast_port **pmctx, 959 struct net_bridge_vlan *vlan, 960 struct sk_buff *skb, u16 vid); 961struct net_bridge_mdb_entry * 962br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 963 u16 vid); 964int br_multicast_add_port(struct net_bridge_port *port); 965void br_multicast_del_port(struct net_bridge_port *port); 966void br_multicast_enable_port(struct net_bridge_port *port); 967void br_multicast_disable_port(struct net_bridge_port *port); 968void br_multicast_init(struct net_bridge *br); 969void br_multicast_join_snoopers(struct net_bridge *br); 970void br_multicast_leave_snoopers(struct net_bridge *br); 971void br_multicast_open(struct net_bridge *br); 972void br_multicast_stop(struct net_bridge *br); 973void br_multicast_dev_del(struct net_bridge *br); 974void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 975 struct net_bridge_mcast *brmctx, 976 bool local_rcv, bool local_orig); 977int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 978int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 979 unsigned long val); 980int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 981int br_multicast_toggle(struct net_bridge *br, unsigned long val, 982 struct netlink_ext_ack *extack); 983int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 984int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 985 unsigned long val); 986#if IS_ENABLED(CONFIG_IPV6) 987int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 988 unsigned long val); 989#endif 990struct net_bridge_mdb_entry * 991br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 992struct net_bridge_mdb_entry * 993br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 994struct net_bridge_port_group * 995br_multicast_new_port_group(struct net_bridge_port *port, 996 const struct br_ip *group, 997 struct net_bridge_port_group __rcu *next, 998 unsigned char flags, const unsigned char *src, 999 u8 filter_mode, u8 rt_protocol, 1000 struct netlink_ext_ack *extack); 1001void br_multicast_del_port_group(struct net_bridge_port_group *p); 1002int br_mdb_hash_init(struct net_bridge *br); 1003void br_mdb_hash_fini(struct net_bridge *br); 1004void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1005 struct net_bridge_port_group *pg, int type); 1006void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 1007 int type); 1008void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 1009 struct net_bridge_port_group *pg, 1010 struct net_bridge_port_group __rcu **pp); 1011void br_multicast_count(struct net_bridge *br, 1012 const struct net_bridge_port *p, 1013 const struct sk_buff *skb, u8 type, u8 dir); 1014int br_multicast_init_stats(struct net_bridge *br); 1015void br_multicast_uninit_stats(struct net_bridge *br); 1016void br_multicast_get_stats(const struct net_bridge *br, 1017 const struct net_bridge_port *p, 1018 struct br_mcast_stats *dest); 1019u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 1020void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 1021u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 1022int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 1023 struct netlink_ext_ack *extack); 1024int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1025 struct netlink_ext_ack *extack); 1026int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1027 struct netlink_ext_ack *extack); 1028int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1029 struct netlink_callback *cb); 1030int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq, 1031 struct netlink_ext_ack *extack); 1032void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 1033 struct net_bridge_mdb_entry *mp, bool notify); 1034void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 1035void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 1036 u8 filter_mode); 1037void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 1038 struct net_bridge_port_group *sg); 1039struct net_bridge_group_src * 1040br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1041struct net_bridge_group_src * 1042br_multicast_new_group_src(struct net_bridge_port_group *pg, 1043 struct br_ip *src_ip); 1044void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1045void br_multicast_del_group_src(struct net_bridge_group_src *src, 1046 bool fastleave); 1047void br_multicast_ctx_init(struct net_bridge *br, 1048 struct net_bridge_vlan *vlan, 1049 struct net_bridge_mcast *brmctx); 1050void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1051void br_multicast_port_ctx_init(struct net_bridge_port *port, 1052 struct net_bridge_vlan *vlan, 1053 struct net_bridge_mcast_port *pmctx); 1054void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1055void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1056int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1057 struct netlink_ext_ack *extack); 1058bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1059 1060int br_rports_fill_info(struct sk_buff *skb, 1061 const struct net_bridge_mcast *brmctx); 1062int br_multicast_dump_querier_state(struct sk_buff *skb, 1063 const struct net_bridge_mcast *brmctx, 1064 int nest_attr); 1065size_t br_multicast_querier_state_size(void); 1066size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1067void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1068 unsigned long val); 1069void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1070 unsigned long val); 1071 1072static inline bool br_group_is_l2(const struct br_ip *group) 1073{ 1074 return group->proto == 0; 1075} 1076 1077#define mlock_dereference(X, br) \ 1078 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1079 1080static inline struct hlist_node * 1081br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1082 struct sk_buff *skb) 1083{ 1084#if IS_ENABLED(CONFIG_IPV6) 1085 if (skb->protocol == htons(ETH_P_IPV6)) 1086 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1087#endif 1088 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1089} 1090 1091static inline struct net_bridge_port * 1092br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1093{ 1094 struct net_bridge_mcast_port *mctx; 1095 1096#if IS_ENABLED(CONFIG_IPV6) 1097 if (skb->protocol == htons(ETH_P_IPV6)) 1098 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1099 ip6_rlist); 1100 else 1101#endif 1102 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1103 ip4_rlist); 1104 1105 if (mctx) 1106 return mctx->port; 1107 else 1108 return NULL; 1109} 1110 1111static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1112{ 1113 return timer_pending(&brmctx->ip4_mc_router_timer); 1114} 1115 1116static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1117{ 1118#if IS_ENABLED(CONFIG_IPV6) 1119 return timer_pending(&brmctx->ip6_mc_router_timer); 1120#else 1121 return false; 1122#endif 1123} 1124 1125static inline bool 1126br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1127{ 1128 switch (brmctx->multicast_router) { 1129 case MDB_RTR_TYPE_PERM: 1130 return true; 1131 case MDB_RTR_TYPE_TEMP_QUERY: 1132 if (skb) { 1133 if (skb->protocol == htons(ETH_P_IP)) 1134 return br_ip4_multicast_is_router(brmctx); 1135 else if (skb->protocol == htons(ETH_P_IPV6)) 1136 return br_ip6_multicast_is_router(brmctx); 1137 } else { 1138 return br_ip4_multicast_is_router(brmctx) || 1139 br_ip6_multicast_is_router(brmctx); 1140 } 1141 fallthrough; 1142 default: 1143 return false; 1144 } 1145} 1146 1147static inline bool 1148__br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1149 struct bridge_mcast_other_query *querier, 1150 const bool is_ipv6) 1151{ 1152 bool own_querier_enabled; 1153 1154 if (brmctx->multicast_querier) { 1155 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1156 own_querier_enabled = false; 1157 else 1158 own_querier_enabled = true; 1159 } else { 1160 own_querier_enabled = false; 1161 } 1162 1163 return !timer_pending(&querier->delay_timer) && 1164 (own_querier_enabled || timer_pending(&querier->timer)); 1165} 1166 1167static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1168 struct ethhdr *eth, 1169 const struct net_bridge_mdb_entry *mdb) 1170{ 1171 switch (eth->h_proto) { 1172 case (htons(ETH_P_IP)): 1173 return __br_multicast_querier_exists(brmctx, 1174 &brmctx->ip4_other_query, false); 1175#if IS_ENABLED(CONFIG_IPV6) 1176 case (htons(ETH_P_IPV6)): 1177 return __br_multicast_querier_exists(brmctx, 1178 &brmctx->ip6_other_query, true); 1179#endif 1180 default: 1181 return !!mdb && br_group_is_l2(&mdb->addr); 1182 } 1183} 1184 1185static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1186{ 1187 switch (ip->proto) { 1188 case htons(ETH_P_IP): 1189 return ipv4_is_zeronet(ip->src.ip4); 1190#if IS_ENABLED(CONFIG_IPV6) 1191 case htons(ETH_P_IPV6): 1192 return ipv6_addr_any(&ip->src.ip6); 1193#endif 1194 default: 1195 return false; 1196 } 1197} 1198 1199static inline bool 1200br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1201 __be16 proto) 1202{ 1203 switch (proto) { 1204 case htons(ETH_P_IP): 1205 return !!(brmctx->multicast_igmp_version == 3); 1206#if IS_ENABLED(CONFIG_IPV6) 1207 case htons(ETH_P_IPV6): 1208 return !!(brmctx->multicast_mld_version == 2); 1209#endif 1210 default: 1211 return false; 1212 } 1213} 1214 1215static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1216{ 1217 return BR_INPUT_SKB_CB(skb)->igmp; 1218} 1219 1220static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1221{ 1222 return brmctx->multicast_last_member_interval * 1223 brmctx->multicast_last_member_count; 1224} 1225 1226static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1227{ 1228 return brmctx->multicast_membership_interval; 1229} 1230 1231static inline bool 1232br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1233{ 1234 return !!brmctx->vlan; 1235} 1236 1237static inline bool 1238br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1239{ 1240 return !!pmctx->vlan; 1241} 1242 1243static inline struct net_bridge_mcast * 1244br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1245{ 1246 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1247 return &pmctx->port->br->multicast_ctx; 1248 else 1249 return &pmctx->vlan->brvlan->br_mcast_ctx; 1250} 1251 1252static inline bool 1253br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1254{ 1255 return br_multicast_ctx_is_vlan(brmctx) && 1256 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1257 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1258} 1259 1260static inline bool 1261br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1262{ 1263 return br_multicast_ctx_is_vlan(brmctx) && 1264 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1265} 1266 1267static inline bool 1268br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1269{ 1270 return br_multicast_port_ctx_is_vlan(pmctx) && 1271 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1272} 1273 1274static inline bool 1275br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1276{ 1277 return pmctx->port->state == BR_STATE_DISABLED || 1278 (br_multicast_port_ctx_is_vlan(pmctx) && 1279 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1280 pmctx->vlan->state == BR_STATE_DISABLED)); 1281} 1282 1283static inline bool 1284br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1285{ 1286 return br_multicast_port_ctx_state_disabled(pmctx) || 1287 pmctx->port->state == BR_STATE_BLOCKING || 1288 (br_multicast_port_ctx_is_vlan(pmctx) && 1289 pmctx->vlan->state == BR_STATE_BLOCKING); 1290} 1291 1292static inline bool 1293br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1294{ 1295#if IS_ENABLED(CONFIG_IPV6) 1296 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1297 !hlist_empty(&brmctx->ip6_mc_router_list); 1298#else 1299 return !hlist_empty(&brmctx->ip4_mc_router_list); 1300#endif 1301} 1302 1303static inline bool 1304br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1305 const struct net_bridge_mcast *brmctx2) 1306{ 1307 return brmctx1->multicast_igmp_version == 1308 brmctx2->multicast_igmp_version && 1309 brmctx1->multicast_last_member_count == 1310 brmctx2->multicast_last_member_count && 1311 brmctx1->multicast_startup_query_count == 1312 brmctx2->multicast_startup_query_count && 1313 brmctx1->multicast_last_member_interval == 1314 brmctx2->multicast_last_member_interval && 1315 brmctx1->multicast_membership_interval == 1316 brmctx2->multicast_membership_interval && 1317 brmctx1->multicast_querier_interval == 1318 brmctx2->multicast_querier_interval && 1319 brmctx1->multicast_query_interval == 1320 brmctx2->multicast_query_interval && 1321 brmctx1->multicast_query_response_interval == 1322 brmctx2->multicast_query_response_interval && 1323 brmctx1->multicast_startup_query_interval == 1324 brmctx2->multicast_startup_query_interval && 1325 brmctx1->multicast_querier == brmctx2->multicast_querier && 1326 brmctx1->multicast_router == brmctx2->multicast_router && 1327 !br_rports_have_mc_router(brmctx1) && 1328 !br_rports_have_mc_router(brmctx2) && 1329#if IS_ENABLED(CONFIG_IPV6) 1330 brmctx1->multicast_mld_version == 1331 brmctx2->multicast_mld_version && 1332#endif 1333 true; 1334} 1335 1336static inline bool 1337br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1338{ 1339 bool vlan_snooping_enabled; 1340 1341 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1342 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1343 1344 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1345} 1346#else 1347static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1348 struct net_bridge_mcast_port **pmctx, 1349 struct net_bridge_vlan *vlan, 1350 struct sk_buff *skb, 1351 u16 vid) 1352{ 1353 return 0; 1354} 1355 1356static inline struct net_bridge_mdb_entry * 1357br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 1358 u16 vid) 1359{ 1360 return NULL; 1361} 1362 1363static inline int br_multicast_add_port(struct net_bridge_port *port) 1364{ 1365 return 0; 1366} 1367 1368static inline void br_multicast_del_port(struct net_bridge_port *port) 1369{ 1370} 1371 1372static inline void br_multicast_enable_port(struct net_bridge_port *port) 1373{ 1374} 1375 1376static inline void br_multicast_disable_port(struct net_bridge_port *port) 1377{ 1378} 1379 1380static inline void br_multicast_init(struct net_bridge *br) 1381{ 1382} 1383 1384static inline void br_multicast_join_snoopers(struct net_bridge *br) 1385{ 1386} 1387 1388static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1389{ 1390} 1391 1392static inline void br_multicast_open(struct net_bridge *br) 1393{ 1394} 1395 1396static inline void br_multicast_stop(struct net_bridge *br) 1397{ 1398} 1399 1400static inline void br_multicast_dev_del(struct net_bridge *br) 1401{ 1402} 1403 1404static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1405 struct sk_buff *skb, 1406 struct net_bridge_mcast *brmctx, 1407 bool local_rcv, bool local_orig) 1408{ 1409} 1410 1411static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1412 struct sk_buff *skb) 1413{ 1414 return false; 1415} 1416 1417static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1418 struct ethhdr *eth, 1419 const struct net_bridge_mdb_entry *mdb) 1420{ 1421 return false; 1422} 1423 1424static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1425 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1426{ 1427 return -EOPNOTSUPP; 1428} 1429 1430static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1431 struct netlink_ext_ack *extack) 1432{ 1433 return -EOPNOTSUPP; 1434} 1435 1436static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1437 struct netlink_ext_ack *extack) 1438{ 1439 return -EOPNOTSUPP; 1440} 1441 1442static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1443 struct netlink_callback *cb) 1444{ 1445 return 0; 1446} 1447 1448static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[], 1449 u32 portid, u32 seq, 1450 struct netlink_ext_ack *extack) 1451{ 1452 return -EOPNOTSUPP; 1453} 1454 1455static inline int br_mdb_hash_init(struct net_bridge *br) 1456{ 1457 return 0; 1458} 1459 1460static inline void br_mdb_hash_fini(struct net_bridge *br) 1461{ 1462} 1463 1464static inline void br_multicast_count(struct net_bridge *br, 1465 const struct net_bridge_port *p, 1466 const struct sk_buff *skb, 1467 u8 type, u8 dir) 1468{ 1469} 1470 1471static inline int br_multicast_init_stats(struct net_bridge *br) 1472{ 1473 return 0; 1474} 1475 1476static inline void br_multicast_uninit_stats(struct net_bridge *br) 1477{ 1478} 1479 1480static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1481{ 1482 return 0; 1483} 1484 1485static inline void br_multicast_ctx_init(struct net_bridge *br, 1486 struct net_bridge_vlan *vlan, 1487 struct net_bridge_mcast *brmctx) 1488{ 1489} 1490 1491static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1492{ 1493} 1494 1495static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1496 struct net_bridge_vlan *vlan, 1497 struct net_bridge_mcast_port *pmctx) 1498{ 1499} 1500 1501static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1502{ 1503} 1504 1505static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1506 bool on) 1507{ 1508} 1509 1510static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1511 bool on, 1512 struct netlink_ext_ack *extack) 1513{ 1514 return -EOPNOTSUPP; 1515} 1516 1517static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1518 bool on) 1519{ 1520 return false; 1521} 1522 1523static inline bool 1524br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1525 const struct net_bridge_mcast *brmctx2) 1526{ 1527 return true; 1528} 1529#endif 1530 1531/* br_vlan.c */ 1532#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1533bool br_allowed_ingress(const struct net_bridge *br, 1534 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1535 u16 *vid, u8 *state, 1536 struct net_bridge_vlan **vlan); 1537bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1538 const struct sk_buff *skb); 1539bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1540struct sk_buff *br_handle_vlan(struct net_bridge *br, 1541 const struct net_bridge_port *port, 1542 struct net_bridge_vlan_group *vg, 1543 struct sk_buff *skb); 1544int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1545 bool *changed, struct netlink_ext_ack *extack); 1546int br_vlan_delete(struct net_bridge *br, u16 vid); 1547void br_vlan_flush(struct net_bridge *br); 1548struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1549void br_recalculate_fwd_mask(struct net_bridge *br); 1550int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1551 struct netlink_ext_ack *extack); 1552int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1553 struct netlink_ext_ack *extack); 1554int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1555 struct netlink_ext_ack *extack); 1556int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1557int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1558int br_vlan_init(struct net_bridge *br); 1559int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1560 struct netlink_ext_ack *extack); 1561int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1562 struct netlink_ext_ack *extack); 1563int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1564 bool *changed, struct netlink_ext_ack *extack); 1565int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1566void nbp_vlan_flush(struct net_bridge_port *port); 1567int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1568int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1569void br_vlan_get_stats(const struct net_bridge_vlan *v, 1570 struct pcpu_sw_netstats *stats); 1571void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1572int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1573 void *ptr); 1574void br_vlan_rtnl_init(void); 1575void br_vlan_rtnl_uninit(void); 1576void br_vlan_notify(const struct net_bridge *br, 1577 const struct net_bridge_port *p, 1578 u16 vid, u16 vid_range, 1579 int cmd); 1580bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1581 const struct net_bridge_vlan *range_end); 1582 1583void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1584 struct net_device_path_ctx *ctx, 1585 struct net_device_path *path); 1586int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1587 struct net_bridge_port *dst, 1588 struct net_device_path *path); 1589 1590static inline struct net_bridge_vlan_group *br_vlan_group( 1591 const struct net_bridge *br) 1592{ 1593 return rtnl_dereference(br->vlgrp); 1594} 1595 1596static inline struct net_bridge_vlan_group *nbp_vlan_group( 1597 const struct net_bridge_port *p) 1598{ 1599 return rtnl_dereference(p->vlgrp); 1600} 1601 1602static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1603 const struct net_bridge *br) 1604{ 1605 return rcu_dereference(br->vlgrp); 1606} 1607 1608static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1609 const struct net_bridge_port *p) 1610{ 1611 return rcu_dereference(p->vlgrp); 1612} 1613 1614/* Since bridge now depends on 8021Q module, but the time bridge sees the 1615 * skb, the vlan tag will always be present if the frame was tagged. 1616 */ 1617static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1618{ 1619 int err = 0; 1620 1621 if (skb_vlan_tag_present(skb)) { 1622 *vid = skb_vlan_tag_get_id(skb); 1623 } else { 1624 *vid = 0; 1625 err = -EINVAL; 1626 } 1627 1628 return err; 1629} 1630 1631static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1632{ 1633 if (!vg) 1634 return 0; 1635 1636 smp_rmb(); 1637 return vg->pvid; 1638} 1639 1640static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1641{ 1642 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1643} 1644#else 1645static inline bool br_allowed_ingress(const struct net_bridge *br, 1646 struct net_bridge_vlan_group *vg, 1647 struct sk_buff *skb, 1648 u16 *vid, u8 *state, 1649 struct net_bridge_vlan **vlan) 1650 1651{ 1652 *vlan = NULL; 1653 return true; 1654} 1655 1656static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1657 const struct sk_buff *skb) 1658{ 1659 return true; 1660} 1661 1662static inline bool br_should_learn(struct net_bridge_port *p, 1663 struct sk_buff *skb, u16 *vid) 1664{ 1665 return true; 1666} 1667 1668static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1669 const struct net_bridge_port *port, 1670 struct net_bridge_vlan_group *vg, 1671 struct sk_buff *skb) 1672{ 1673 return skb; 1674} 1675 1676static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1677 bool *changed, struct netlink_ext_ack *extack) 1678{ 1679 *changed = false; 1680 return -EOPNOTSUPP; 1681} 1682 1683static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1684{ 1685 return -EOPNOTSUPP; 1686} 1687 1688static inline void br_vlan_flush(struct net_bridge *br) 1689{ 1690} 1691 1692static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1693{ 1694} 1695 1696static inline int br_vlan_init(struct net_bridge *br) 1697{ 1698 return 0; 1699} 1700 1701static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1702 bool *changed, struct netlink_ext_ack *extack) 1703{ 1704 *changed = false; 1705 return -EOPNOTSUPP; 1706} 1707 1708static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1709{ 1710 return -EOPNOTSUPP; 1711} 1712 1713static inline void nbp_vlan_flush(struct net_bridge_port *port) 1714{ 1715} 1716 1717static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1718 u16 vid) 1719{ 1720 return NULL; 1721} 1722 1723static inline int nbp_vlan_init(struct net_bridge_port *port, 1724 struct netlink_ext_ack *extack) 1725{ 1726 return 0; 1727} 1728 1729static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1730{ 1731 return 0; 1732} 1733 1734static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1735{ 1736 return 0; 1737} 1738 1739static inline int br_vlan_filter_toggle(struct net_bridge *br, 1740 unsigned long val, 1741 struct netlink_ext_ack *extack) 1742{ 1743 return -EOPNOTSUPP; 1744} 1745 1746static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1747 u32 filter_mask) 1748{ 1749 return 0; 1750} 1751 1752static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1753 struct net_device_path_ctx *ctx, 1754 struct net_device_path *path) 1755{ 1756} 1757 1758static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1759 struct net_bridge_port *dst, 1760 struct net_device_path *path) 1761{ 1762 return 0; 1763} 1764 1765static inline struct net_bridge_vlan_group *br_vlan_group( 1766 const struct net_bridge *br) 1767{ 1768 return NULL; 1769} 1770 1771static inline struct net_bridge_vlan_group *nbp_vlan_group( 1772 const struct net_bridge_port *p) 1773{ 1774 return NULL; 1775} 1776 1777static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1778 const struct net_bridge *br) 1779{ 1780 return NULL; 1781} 1782 1783static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1784 const struct net_bridge_port *p) 1785{ 1786 return NULL; 1787} 1788 1789static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1790 struct pcpu_sw_netstats *stats) 1791{ 1792} 1793 1794static inline void br_vlan_port_event(struct net_bridge_port *p, 1795 unsigned long event) 1796{ 1797} 1798 1799static inline int br_vlan_bridge_event(struct net_device *dev, 1800 unsigned long event, void *ptr) 1801{ 1802 return 0; 1803} 1804 1805static inline void br_vlan_rtnl_init(void) 1806{ 1807} 1808 1809static inline void br_vlan_rtnl_uninit(void) 1810{ 1811} 1812 1813static inline void br_vlan_notify(const struct net_bridge *br, 1814 const struct net_bridge_port *p, 1815 u16 vid, u16 vid_range, 1816 int cmd) 1817{ 1818} 1819 1820static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1821 const struct net_bridge_vlan *range_end) 1822{ 1823 return true; 1824} 1825 1826static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1827{ 1828 return 0; 1829} 1830 1831#endif 1832 1833/* br_vlan_options.c */ 1834#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1835bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1836 const struct net_bridge_vlan *range_end); 1837bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1838 const struct net_bridge_port *p); 1839size_t br_vlan_opts_nl_size(void); 1840int br_vlan_process_options(const struct net_bridge *br, 1841 const struct net_bridge_port *p, 1842 struct net_bridge_vlan *range_start, 1843 struct net_bridge_vlan *range_end, 1844 struct nlattr **tb, 1845 struct netlink_ext_ack *extack); 1846int br_vlan_rtm_process_global_options(struct net_device *dev, 1847 const struct nlattr *attr, 1848 int cmd, 1849 struct netlink_ext_ack *extack); 1850bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1851 const struct net_bridge_vlan *r_end); 1852bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1853 const struct net_bridge_vlan *v_opts); 1854 1855/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1856static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1857{ 1858 return READ_ONCE(v->state); 1859} 1860 1861static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1862{ 1863 WRITE_ONCE(v->state, state); 1864} 1865 1866static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1867{ 1868 return READ_ONCE(vg->pvid_state); 1869} 1870 1871static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1872 u8 state) 1873{ 1874 WRITE_ONCE(vg->pvid_state, state); 1875} 1876 1877/* learn_allow is true at ingress and false at egress */ 1878static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1879{ 1880 switch (state) { 1881 case BR_STATE_LEARNING: 1882 return learn_allow; 1883 case BR_STATE_FORWARDING: 1884 return true; 1885 default: 1886 return false; 1887 } 1888} 1889#endif 1890 1891/* br_mst.c */ 1892#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1893DECLARE_STATIC_KEY_FALSE(br_mst_used); 1894static inline bool br_mst_is_enabled(struct net_bridge *br) 1895{ 1896 return static_branch_unlikely(&br_mst_used) && 1897 br_opt_get(br, BROPT_MST_ENABLED); 1898} 1899 1900int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1901 struct netlink_ext_ack *extack); 1902int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1903void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1904int br_mst_set_enabled(struct net_bridge *br, bool on, 1905 struct netlink_ext_ack *extack); 1906size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1907int br_mst_fill_info(struct sk_buff *skb, 1908 const struct net_bridge_vlan_group *vg); 1909int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1910 struct netlink_ext_ack *extack); 1911#else 1912static inline bool br_mst_is_enabled(struct net_bridge *br) 1913{ 1914 return false; 1915} 1916 1917static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1918 u8 state, struct netlink_ext_ack *extack) 1919{ 1920 return -EOPNOTSUPP; 1921} 1922 1923static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1924 struct netlink_ext_ack *extack) 1925{ 1926 return -EOPNOTSUPP; 1927} 1928 1929static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1930{ 1931 return 0; 1932} 1933 1934static inline int br_mst_fill_info(struct sk_buff *skb, 1935 const struct net_bridge_vlan_group *vg) 1936{ 1937 return -EOPNOTSUPP; 1938} 1939 1940static inline int br_mst_process(struct net_bridge_port *p, 1941 const struct nlattr *mst_attr, 1942 struct netlink_ext_ack *extack) 1943{ 1944 return -EOPNOTSUPP; 1945} 1946#endif 1947 1948struct nf_br_ops { 1949 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1950}; 1951extern const struct nf_br_ops __rcu *nf_br_ops; 1952 1953/* br_netfilter.c */ 1954#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1955int br_nf_core_init(void); 1956void br_nf_core_fini(void); 1957void br_netfilter_rtable_init(struct net_bridge *); 1958#else 1959static inline int br_nf_core_init(void) { return 0; } 1960static inline void br_nf_core_fini(void) {} 1961#define br_netfilter_rtable_init(x) 1962#endif 1963 1964/* br_stp.c */ 1965void br_set_state(struct net_bridge_port *p, unsigned int state); 1966struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1967void br_init_port(struct net_bridge_port *p); 1968void br_become_designated_port(struct net_bridge_port *p); 1969 1970void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1971int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1972int br_set_hello_time(struct net_bridge *br, unsigned long x); 1973int br_set_max_age(struct net_bridge *br, unsigned long x); 1974int __set_ageing_time(struct net_device *dev, unsigned long t); 1975int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1976 1977 1978/* br_stp_if.c */ 1979void br_stp_enable_bridge(struct net_bridge *br); 1980void br_stp_disable_bridge(struct net_bridge *br); 1981int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1982 struct netlink_ext_ack *extack); 1983void br_stp_enable_port(struct net_bridge_port *p); 1984void br_stp_disable_port(struct net_bridge_port *p); 1985bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1986void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1987void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1988int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1989int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1990ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1991 1992/* br_stp_bpdu.c */ 1993struct stp_proto; 1994void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1995 struct net_device *dev); 1996 1997/* br_stp_timer.c */ 1998void br_stp_timer_init(struct net_bridge *br); 1999void br_stp_port_timer_init(struct net_bridge_port *p); 2000unsigned long br_timer_value(const struct timer_list *timer); 2001 2002/* br.c */ 2003#if IS_ENABLED(CONFIG_ATM_LANE) 2004extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 2005#endif 2006 2007/* br_mrp.c */ 2008#if IS_ENABLED(CONFIG_BRIDGE_MRP) 2009int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2010 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2011bool br_mrp_enabled(struct net_bridge *br); 2012void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 2013int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 2014#else 2015static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2016 struct nlattr *attr, int cmd, 2017 struct netlink_ext_ack *extack) 2018{ 2019 return -EOPNOTSUPP; 2020} 2021 2022static inline bool br_mrp_enabled(struct net_bridge *br) 2023{ 2024 return false; 2025} 2026 2027static inline void br_mrp_port_del(struct net_bridge *br, 2028 struct net_bridge_port *p) 2029{ 2030} 2031 2032static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 2033{ 2034 return 0; 2035} 2036 2037#endif 2038 2039/* br_cfm.c */ 2040#if IS_ENABLED(CONFIG_BRIDGE_CFM) 2041int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2042 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2043bool br_cfm_created(struct net_bridge *br); 2044void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 2045int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 2046int br_cfm_status_fill_info(struct sk_buff *skb, 2047 struct net_bridge *br, 2048 bool getlink); 2049int br_cfm_mep_count(struct net_bridge *br, u32 *count); 2050int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 2051#else 2052static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2053 struct nlattr *attr, int cmd, 2054 struct netlink_ext_ack *extack) 2055{ 2056 return -EOPNOTSUPP; 2057} 2058 2059static inline bool br_cfm_created(struct net_bridge *br) 2060{ 2061 return false; 2062} 2063 2064static inline void br_cfm_port_del(struct net_bridge *br, 2065 struct net_bridge_port *p) 2066{ 2067} 2068 2069static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2070{ 2071 return -EOPNOTSUPP; 2072} 2073 2074static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2075 struct net_bridge *br, 2076 bool getlink) 2077{ 2078 return -EOPNOTSUPP; 2079} 2080 2081static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2082{ 2083 *count = 0; 2084 return -EOPNOTSUPP; 2085} 2086 2087static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2088{ 2089 *count = 0; 2090 return -EOPNOTSUPP; 2091} 2092#endif 2093 2094/* br_netlink.c */ 2095extern struct rtnl_link_ops br_link_ops; 2096int br_netlink_init(void); 2097void br_netlink_fini(void); 2098void br_ifinfo_notify(int event, const struct net_bridge *br, 2099 const struct net_bridge_port *port); 2100void br_info_notify(int event, const struct net_bridge *br, 2101 const struct net_bridge_port *port, u32 filter); 2102int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2103 struct netlink_ext_ack *extack); 2104int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2105int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2106 u32 filter_mask, int nlflags); 2107int br_process_vlan_info(struct net_bridge *br, 2108 struct net_bridge_port *p, int cmd, 2109 struct bridge_vlan_info *vinfo_curr, 2110 struct bridge_vlan_info **vinfo_last, 2111 bool *changed, 2112 struct netlink_ext_ack *extack); 2113 2114#ifdef CONFIG_SYSFS 2115/* br_sysfs_if.c */ 2116extern const struct sysfs_ops brport_sysfs_ops; 2117int br_sysfs_addif(struct net_bridge_port *p); 2118int br_sysfs_renameif(struct net_bridge_port *p); 2119 2120/* br_sysfs_br.c */ 2121int br_sysfs_addbr(struct net_device *dev); 2122void br_sysfs_delbr(struct net_device *dev); 2123 2124#else 2125 2126static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2127static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2128static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2129static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2130#endif /* CONFIG_SYSFS */ 2131 2132/* br_switchdev.c */ 2133#ifdef CONFIG_NET_SWITCHDEV 2134int br_switchdev_port_offload(struct net_bridge_port *p, 2135 struct net_device *dev, const void *ctx, 2136 struct notifier_block *atomic_nb, 2137 struct notifier_block *blocking_nb, 2138 bool tx_fwd_offload, 2139 struct netlink_ext_ack *extack); 2140 2141void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2142 struct notifier_block *atomic_nb, 2143 struct notifier_block *blocking_nb); 2144 2145int br_switchdev_port_replay(struct net_bridge_port *p, 2146 struct net_device *dev, const void *ctx, 2147 struct notifier_block *atomic_nb, 2148 struct notifier_block *blocking_nb, 2149 struct netlink_ext_ack *extack); 2150 2151bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2152 2153void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2154 2155void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2156 struct sk_buff *skb); 2157void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2158 struct sk_buff *skb); 2159void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2160 struct sk_buff *skb); 2161bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2162 const struct sk_buff *skb); 2163int br_switchdev_set_port_flag(struct net_bridge_port *p, 2164 unsigned long flags, 2165 unsigned long mask, 2166 struct netlink_ext_ack *extack); 2167void br_switchdev_fdb_notify(struct net_bridge *br, 2168 const struct net_bridge_fdb_entry *fdb, int type); 2169void br_switchdev_mdb_notify(struct net_device *dev, 2170 struct net_bridge_mdb_entry *mp, 2171 struct net_bridge_port_group *pg, 2172 int type); 2173int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2174 bool changed, struct netlink_ext_ack *extack); 2175int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2176void br_switchdev_init(struct net_bridge *br); 2177 2178static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2179{ 2180 skb->offload_fwd_mark = 0; 2181} 2182#else 2183static inline int 2184br_switchdev_port_offload(struct net_bridge_port *p, 2185 struct net_device *dev, const void *ctx, 2186 struct notifier_block *atomic_nb, 2187 struct notifier_block *blocking_nb, 2188 bool tx_fwd_offload, 2189 struct netlink_ext_ack *extack) 2190{ 2191 return -EOPNOTSUPP; 2192} 2193 2194static inline void 2195br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2196 struct notifier_block *atomic_nb, 2197 struct notifier_block *blocking_nb) 2198{ 2199} 2200 2201static inline int 2202br_switchdev_port_replay(struct net_bridge_port *p, 2203 struct net_device *dev, const void *ctx, 2204 struct notifier_block *atomic_nb, 2205 struct notifier_block *blocking_nb, 2206 struct netlink_ext_ack *extack) 2207{ 2208 return -EOPNOTSUPP; 2209} 2210 2211static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2212{ 2213 return false; 2214} 2215 2216static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2217{ 2218} 2219 2220static inline void 2221nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2222 struct sk_buff *skb) 2223{ 2224} 2225 2226static inline void 2227nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2228 struct sk_buff *skb) 2229{ 2230} 2231 2232static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2233 struct sk_buff *skb) 2234{ 2235} 2236 2237static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2238 const struct sk_buff *skb) 2239{ 2240 return true; 2241} 2242 2243static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2244 unsigned long flags, 2245 unsigned long mask, 2246 struct netlink_ext_ack *extack) 2247{ 2248 return 0; 2249} 2250 2251static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2252 u16 flags, bool changed, 2253 struct netlink_ext_ack *extack) 2254{ 2255 return -EOPNOTSUPP; 2256} 2257 2258static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2259{ 2260 return -EOPNOTSUPP; 2261} 2262 2263static inline void 2264br_switchdev_fdb_notify(struct net_bridge *br, 2265 const struct net_bridge_fdb_entry *fdb, int type) 2266{ 2267} 2268 2269static inline void br_switchdev_mdb_notify(struct net_device *dev, 2270 struct net_bridge_mdb_entry *mp, 2271 struct net_bridge_port_group *pg, 2272 int type) 2273{ 2274} 2275 2276static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2277{ 2278} 2279 2280static inline void br_switchdev_init(struct net_bridge *br) 2281{ 2282} 2283 2284#endif /* CONFIG_NET_SWITCHDEV */ 2285 2286/* br_arp_nd_proxy.c */ 2287void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2288void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2289 u16 vid, struct net_bridge_port *p); 2290void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2291 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2292struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2293bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid); 2294#endif 2295