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br_private.h
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linux-6.19.14/net/bridge/br_private.h
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#define BR_MULTICAST_QUERY_INTVL_MAX msecs_to_jiffies(86400000) /* 24 hours */ 35#define BR_MULTICAST_STARTUP_QUERY_INTVL_MAX BR_MULTICAST_QUERY_INTVL_MAX 36 37#define BR_HWDOM_MAX BITS_PER_LONG 38 39#define BR_VERSION "2.3" 40 41/* Control of forwarding link local multicast */ 42#define BR_GROUPFWD_DEFAULT 0 43/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 44enum { 45 BR_GROUPFWD_STP = BIT(0), 46 BR_GROUPFWD_MACPAUSE = BIT(1), 47 BR_GROUPFWD_LACP = BIT(2), 48}; 49 50#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 51 BR_GROUPFWD_LACP) 52/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 53#define BR_GROUPFWD_8021AD 0xB801u 54 55/* Path to usermode spanning tree program */ 56#define BR_STP_PROG "/sbin/bridge-stp" 57 58#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 59 60typedef struct bridge_id bridge_id; 61typedef struct mac_addr mac_addr; 62typedef __u16 port_id; 63 64struct bridge_id { 65 unsigned char prio[2]; 66 unsigned char addr[ETH_ALEN]; 67}; 68 69struct mac_addr { 70 unsigned char addr[ETH_ALEN]; 71}; 72 73#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 74/* our own querier */ 75struct bridge_mcast_own_query { 76 struct timer_list timer; 77 u32 startup_sent; 78}; 79 80/* other querier */ 81struct bridge_mcast_other_query { 82 struct timer_list timer; 83 struct timer_list delay_timer; 84}; 85 86/* selected querier */ 87struct bridge_mcast_querier { 88 struct br_ip addr; 89 int port_ifidx; 90 seqcount_spinlock_t seq; 91}; 92 93/* IGMP/MLD statistics */ 94struct bridge_mcast_stats { 95 struct br_mcast_stats mstats; 96 struct u64_stats_sync syncp; 97}; 98 99struct br_mdb_src_entry { 100 struct br_ip addr; 101}; 102 103struct br_mdb_config { 104 struct net_bridge *br; 105 struct net_bridge_port *p; 106 struct br_mdb_entry *entry; 107 struct br_ip group; 108 bool src_entry; 109 u8 filter_mode; 110 u16 nlflags; 111 struct br_mdb_src_entry *src_entries; 112 int num_src_entries; 113 u8 rt_protocol; 114}; 115#endif 116 117/* net_bridge_mcast_port must be always defined due to forwarding stubs */ 118struct net_bridge_mcast_port { 119#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 120 struct net_bridge_port *port; 121 struct net_bridge_vlan *vlan; 122 123 struct bridge_mcast_own_query ip4_own_query; 124 struct timer_list ip4_mc_router_timer; 125 struct hlist_node ip4_rlist; 126#if IS_ENABLED(CONFIG_IPV6) 127 struct bridge_mcast_own_query ip6_own_query; 128 struct timer_list ip6_mc_router_timer; 129 struct hlist_node ip6_rlist; 130#endif /* IS_ENABLED(CONFIG_IPV6) */ 131 unsigned char multicast_router; 132 u32 mdb_n_entries; 133 u32 mdb_max_entries; 134#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 135}; 136 137/* net_bridge_mcast must be always defined due to forwarding stubs */ 138struct net_bridge_mcast { 139#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 140 struct net_bridge *br; 141 struct net_bridge_vlan *vlan; 142 143 u32 multicast_last_member_count; 144 u32 multicast_startup_query_count; 145 146 u8 multicast_querier; 147 u8 multicast_igmp_version; 148 u8 multicast_router; 149#if IS_ENABLED(CONFIG_IPV6) 150 u8 multicast_mld_version; 151#endif 152 unsigned long multicast_last_member_interval; 153 unsigned long multicast_membership_interval; 154 unsigned long multicast_querier_interval; 155 unsigned long multicast_query_interval; 156 unsigned long multicast_query_response_interval; 157 unsigned long multicast_startup_query_interval; 158 struct hlist_head ip4_mc_router_list; 159 struct timer_list ip4_mc_router_timer; 160 struct bridge_mcast_other_query ip4_other_query; 161 struct bridge_mcast_own_query ip4_own_query; 162 struct bridge_mcast_querier ip4_querier; 163#if IS_ENABLED(CONFIG_IPV6) 164 struct hlist_head ip6_mc_router_list; 165 struct timer_list ip6_mc_router_timer; 166 struct bridge_mcast_other_query ip6_other_query; 167 struct bridge_mcast_own_query ip6_own_query; 168 struct bridge_mcast_querier ip6_querier; 169#endif /* IS_ENABLED(CONFIG_IPV6) */ 170#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 171}; 172 173struct br_tunnel_info { 174 __be64 tunnel_id; 175 struct metadata_dst __rcu *tunnel_dst; 176}; 177 178/* private vlan flags */ 179enum { 180 BR_VLFLAG_PER_PORT_STATS = BIT(0), 181 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 182 BR_VLFLAG_MCAST_ENABLED = BIT(2), 183 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 184 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4), 185}; 186 187/** 188 * struct net_bridge_vlan - per-vlan entry 189 * 190 * @vnode: rhashtable member 191 * @tnode: rhashtable member 192 * @vid: VLAN id 193 * @flags: bridge vlan flags 194 * @priv_flags: private (in-kernel) bridge vlan flags 195 * @state: STP state (e.g. blocking, learning, forwarding) 196 * @stats: per-cpu VLAN statistics 197 * @br: if MASTER flag set, this points to a bridge struct 198 * @port: if MASTER flag unset, this points to a port struct 199 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 200 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 201 * for this VLAN entry 202 * @tinfo: bridge tunnel info 203 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 204 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 205 * context 206 * @msti: if MASTER flag set, this holds the VLANs MST instance 207 * @vlist: sorted list of VLAN entries 208 * @rcu: used for entry destruction 209 * 210 * This structure is shared between the global per-VLAN entries contained in 211 * the bridge rhashtable and the local per-port per-VLAN entries contained in 212 * the port's rhashtable. The union entries should be interpreted depending on 213 * the entry flags that are set. 214 */ 215struct net_bridge_vlan { 216 struct rhash_head vnode; 217 struct rhash_head tnode; 218 u16 vid; 219 u16 flags; 220 u16 priv_flags; 221 u8 state; 222 struct pcpu_sw_netstats __percpu *stats; 223 union { 224 struct net_bridge *br; 225 struct net_bridge_port *port; 226 }; 227 union { 228 refcount_t refcnt; 229 struct net_bridge_vlan *brvlan; 230 }; 231 232 struct br_tunnel_info tinfo; 233 234 union { 235 struct net_bridge_mcast br_mcast_ctx; 236 struct net_bridge_mcast_port port_mcast_ctx; 237 }; 238 239 u16 msti; 240 241 struct list_head vlist; 242 243 struct rcu_head rcu; 244}; 245 246/** 247 * struct net_bridge_vlan_group 248 * 249 * @vlan_hash: VLAN entry rhashtable 250 * @tunnel_hash: Hash table to map from tunnel key ID (e.g. VXLAN VNI) to VLAN 251 * @vlan_list: sorted VLAN entry list 252 * @num_vlans: number of total VLAN entries 253 * @pvid: PVID VLAN id 254 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 255 * 256 * IMPORTANT: Be careful when checking if there're VLAN entries using list 257 * primitives because the bridge can have entries in its list which 258 * are just for global context but not for filtering, i.e. they have 259 * the master flag set but not the brentry flag. If you have to check 260 * if there're "real" entries in the bridge please test @num_vlans 261 */ 262struct net_bridge_vlan_group { 263 struct rhashtable vlan_hash; 264 struct rhashtable tunnel_hash; 265 struct list_head vlan_list; 266 u16 num_vlans; 267 u16 pvid; 268 u8 pvid_state; 269}; 270 271/* bridge fdb flags */ 272enum { 273 BR_FDB_LOCAL, 274 BR_FDB_STATIC, 275 BR_FDB_STICKY, 276 BR_FDB_ADDED_BY_USER, 277 BR_FDB_ADDED_BY_EXT_LEARN, 278 BR_FDB_OFFLOADED, 279 BR_FDB_NOTIFY, 280 BR_FDB_NOTIFY_INACTIVE, 281 BR_FDB_LOCKED, 282 BR_FDB_DYNAMIC_LEARNED, 283}; 284 285struct net_bridge_fdb_key { 286 mac_addr addr; 287 u16 vlan_id; 288}; 289 290struct net_bridge_fdb_entry { 291 struct rhash_head rhnode; 292 struct net_bridge_port *dst; 293 294 struct net_bridge_fdb_key key; 295 struct hlist_node fdb_node; 296 unsigned long flags; 297 298 /* write-heavy members should not affect lookups */ 299 unsigned long updated ____cacheline_aligned_in_smp; 300 unsigned long used; 301 302 struct rcu_head rcu; 303}; 304 305struct net_bridge_fdb_flush_desc { 306 unsigned long flags; 307 unsigned long flags_mask; 308 int port_ifindex; 309 u16 vlan_id; 310}; 311 312#define MDB_PG_FLAGS_PERMANENT BIT(0) 313#define MDB_PG_FLAGS_OFFLOAD BIT(1) 314#define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 315#define MDB_PG_FLAGS_STAR_EXCL BIT(3) 316#define MDB_PG_FLAGS_BLOCKED BIT(4) 317#define MDB_PG_FLAGS_OFFLOAD_FAILED BIT(5) 318 319#define PG_SRC_ENT_LIMIT 32 320 321#define BR_SGRP_F_DELETE BIT(0) 322#define BR_SGRP_F_SEND BIT(1) 323#define BR_SGRP_F_INSTALLED BIT(2) 324#define BR_SGRP_F_USER_ADDED BIT(3) 325 326struct net_bridge_mcast_gc { 327 struct hlist_node gc_node; 328 void (*destroy)(struct net_bridge_mcast_gc *gc); 329}; 330 331struct net_bridge_group_src { 332 struct hlist_node node; 333 334 struct br_ip addr; 335 struct net_bridge_port_group *pg; 336 u8 flags; 337 u8 src_query_rexmit_cnt; 338 struct timer_list timer; 339 340 struct net_bridge *br; 341 struct net_bridge_mcast_gc mcast_gc; 342 struct rcu_head rcu; 343}; 344 345struct net_bridge_port_group_sg_key { 346 struct net_bridge_port *port; 347 struct br_ip addr; 348}; 349 350struct net_bridge_port_group { 351 struct net_bridge_port_group __rcu *next; 352 struct net_bridge_port_group_sg_key key; 353 unsigned char eth_addr[ETH_ALEN] __aligned(2); 354 unsigned char flags; 355 unsigned char filter_mode; 356 unsigned char grp_query_rexmit_cnt; 357 unsigned char rt_protocol; 358 359 struct hlist_head src_list; 360 unsigned int src_ents; 361 struct timer_list timer; 362 struct timer_list rexmit_timer; 363 struct hlist_node mglist; 364 struct rb_root eht_set_tree; 365 struct rb_root eht_host_tree; 366 367 struct rhash_head rhnode; 368 struct net_bridge_mcast_gc mcast_gc; 369 struct rcu_head rcu; 370}; 371 372struct net_bridge_mdb_entry { 373 struct rhash_head rhnode; 374 struct net_bridge *br; 375 struct net_bridge_port_group __rcu *ports; 376 struct br_ip addr; 377 bool host_joined; 378 379 struct timer_list timer; 380 struct hlist_node mdb_node; 381 382 struct net_bridge_mcast_gc mcast_gc; 383 struct rcu_head rcu; 384}; 385 386struct net_bridge_port { 387 struct net_bridge *br; 388 struct net_device *dev; 389 netdevice_tracker dev_tracker; 390 struct list_head list; 391 392 unsigned long flags; 393#ifdef CONFIG_BRIDGE_VLAN_FILTERING 394 struct net_bridge_vlan_group __rcu *vlgrp; 395#endif 396 struct net_bridge_port __rcu *backup_port; 397 u32 backup_nhid; 398 399 /* STP */ 400 u8 priority; 401 u8 state; 402 u16 port_no; 403 unsigned char topology_change_ack; 404 unsigned char config_pending; 405 port_id port_id; 406 port_id designated_port; 407 bridge_id designated_root; 408 bridge_id designated_bridge; 409 u32 path_cost; 410 u32 designated_cost; 411 unsigned long designated_age; 412 413 struct timer_list forward_delay_timer; 414 struct timer_list hold_timer; 415 struct timer_list message_age_timer; 416 struct kobject kobj; 417 struct rcu_head rcu; 418 419 struct net_bridge_mcast_port multicast_ctx; 420 421#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 422 struct bridge_mcast_stats __percpu *mcast_stats; 423 424 u32 multicast_eht_hosts_limit; 425 u32 multicast_eht_hosts_cnt; 426 struct hlist_head mglist; 427#endif 428 429#ifdef CONFIG_SYSFS 430 char sysfs_name[IFNAMSIZ]; 431#endif 432 433#ifdef CONFIG_NET_POLL_CONTROLLER 434 struct netpoll *np; 435#endif 436#ifdef CONFIG_NET_SWITCHDEV 437 /* Identifier used to group ports that share the same switchdev 438 * hardware domain. 439 */ 440 int hwdom; 441 int offload_count; 442 struct netdev_phys_item_id ppid; 443#endif 444 u16 group_fwd_mask; 445 u16 backup_redirected_cnt; 446 447 struct bridge_stp_xstats stp_xstats; 448}; 449 450#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 451 452#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 453#define br_promisc_port(p) ((p)->flags & BR_PROMISC) 454 455static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 456{ 457 return rcu_dereference(dev->rx_handler_data); 458} 459 460static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 461{ 462 return netif_is_bridge_port(dev) ? 463 rtnl_dereference(dev->rx_handler_data) : NULL; 464} 465 466static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 467{ 468 return netif_is_bridge_port(dev) ? 469 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 470} 471 472enum net_bridge_opts { 473 BROPT_VLAN_ENABLED, 474 BROPT_VLAN_STATS_ENABLED, 475 BROPT_NF_CALL_IPTABLES, 476 BROPT_NF_CALL_IP6TABLES, 477 BROPT_NF_CALL_ARPTABLES, 478 BROPT_GROUP_ADDR_SET, 479 BROPT_MULTICAST_ENABLED, 480 BROPT_MULTICAST_QUERY_USE_IFADDR, 481 BROPT_MULTICAST_STATS_ENABLED, 482 BROPT_HAS_IPV6_ADDR, 483 BROPT_NEIGH_SUPPRESS_ENABLED, 484 BROPT_MTU_SET_BY_USER, 485 BROPT_VLAN_STATS_PER_PORT, 486 BROPT_NO_LL_LEARN, 487 BROPT_VLAN_BRIDGE_BINDING, 488 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 489 BROPT_MST_ENABLED, 490 BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION, 491 BROPT_FDB_LOCAL_VLAN_0, 492}; 493 494struct net_bridge { 495 spinlock_t lock; 496 spinlock_t hash_lock; 497 struct hlist_head frame_type_list; 498 struct net_device *dev; 499 unsigned long options; 500 /* These fields are accessed on each packet */ 501#ifdef CONFIG_BRIDGE_VLAN_FILTERING 502 __be16 vlan_proto; 503 u16 default_pvid; 504 struct net_bridge_vlan_group __rcu *vlgrp; 505#endif 506 507 struct rhashtable fdb_hash_tbl; 508 struct list_head port_list; 509#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 510 union { 511 struct rtable fake_rtable; 512 struct rt6_info fake_rt6_info; 513 }; 514 u32 metrics[RTAX_MAX]; 515#endif 516 u16 group_fwd_mask; 517 u16 group_fwd_mask_required; 518 519 /* STP */ 520 bridge_id designated_root; 521 bridge_id bridge_id; 522 unsigned char topology_change; 523 unsigned char topology_change_detected; 524 u16 root_port; 525 unsigned long max_age; 526 unsigned long hello_time; 527 unsigned long forward_delay; 528 unsigned long ageing_time; 529 unsigned long bridge_max_age; 530 unsigned long bridge_hello_time; 531 unsigned long bridge_forward_delay; 532 unsigned long bridge_ageing_time; 533 u32 root_path_cost; 534 535 u8 group_addr[ETH_ALEN]; 536 537 enum { 538 BR_NO_STP, /* no spanning tree */ 539 BR_KERNEL_STP, /* old STP in kernel */ 540 BR_USER_STP, /* new RSTP in userspace */ 541 } stp_enabled; 542 543 struct net_bridge_mcast multicast_ctx; 544 545#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 546 struct bridge_mcast_stats __percpu *mcast_stats; 547 548 u32 hash_max; 549 550 spinlock_t multicast_lock; 551 552 struct rhashtable mdb_hash_tbl; 553 struct rhashtable sg_port_tbl; 554 555 struct hlist_head mcast_gc_list; 556 struct hlist_head mdb_list; 557 558 struct work_struct mcast_gc_work; 559#endif 560 561 struct timer_list hello_timer; 562 struct timer_list tcn_timer; 563 struct timer_list topology_change_timer; 564 struct delayed_work gc_work; 565 struct kobject *ifobj; 566 u32 auto_cnt; 567 568 atomic_t fdb_n_learned; 569 u32 fdb_max_learned; 570 571#ifdef CONFIG_NET_SWITCHDEV 572 /* Counter used to make sure that hardware domains get unique 573 * identifiers in case a bridge spans multiple switchdev instances. 574 */ 575 int last_hwdom; 576 /* Bit mask of hardware domain numbers in use */ 577 unsigned long busy_hwdoms; 578#endif 579 struct hlist_head fdb_list; 580 581#if IS_ENABLED(CONFIG_BRIDGE_MRP) 582 struct hlist_head mrp_list; 583#endif 584#if IS_ENABLED(CONFIG_BRIDGE_CFM) 585 struct hlist_head mep_list; 586#endif 587}; 588 589struct br_input_skb_cb { 590 struct net_device *brdev; 591 592 u16 frag_max_size; 593#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 594 u8 igmp; 595 u8 mrouters_only:1; 596#endif 597 u8 proxyarp_replied:1; 598 u8 src_port_isolated:1; 599 u8 promisc:1; 600#ifdef CONFIG_BRIDGE_VLAN_FILTERING 601 u8 vlan_filtered:1; 602#endif 603#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 604 u8 br_netfilter_broute:1; 605#endif 606 607#ifdef CONFIG_NET_SWITCHDEV 608 /* Set if TX data plane offloading is used towards at least one 609 * hardware domain. 610 */ 611 u8 tx_fwd_offload:1; 612 /* The switchdev hardware domain from which this packet was received. 613 * If skb->offload_fwd_mark was set, then this packet was already 614 * forwarded by hardware to the other ports in the source hardware 615 * domain, otherwise it wasn't. 616 */ 617 int src_hwdom; 618 /* Bit mask of hardware domains towards this packet has already been 619 * transmitted using the TX data plane offload. 620 */ 621 unsigned long fwd_hwdoms; 622#endif 623 624 u32 backup_nhid; 625}; 626 627#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 628 629#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 630# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 631#else 632# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 633#endif 634 635#define br_printk(level, br, format, args...) \ 636 printk(level "%s: " format, (br)->dev->name, ##args) 637 638#define br_err(__br, format, args...) \ 639 br_printk(KERN_ERR, __br, format, ##args) 640#define br_warn(__br, format, args...) \ 641 br_printk(KERN_WARNING, __br, format, ##args) 642#define br_notice(__br, format, args...) \ 643 br_printk(KERN_NOTICE, __br, format, ##args) 644#define br_info(__br, format, args...) \ 645 br_printk(KERN_INFO, __br, format, ##args) 646 647#define br_debug(br, format, args...) \ 648 pr_debug("%s: " format, (br)->dev->name, ##args) 649 650/* called under bridge lock */ 651static inline int br_is_root_bridge(const struct net_bridge *br) 652{ 653 return !memcmp(&br->bridge_id, &br->designated_root, 8); 654} 655 656/* check if a VLAN entry is global */ 657static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 658{ 659 return v->flags & BRIDGE_VLAN_INFO_MASTER; 660} 661 662/* check if a VLAN entry is used by the bridge */ 663static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 664{ 665 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 666} 667 668/* check if we should use the vlan entry, returns false if it's only context */ 669static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 670{ 671 if (br_vlan_is_master(v)) { 672 if (br_vlan_is_brentry(v)) 673 return true; 674 else 675 return false; 676 } 677 678 return true; 679} 680 681static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 682{ 683 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 684} 685 686static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 687{ 688 bool ret = vid > 0 && vid < VLAN_VID_MASK; 689 690 if (!ret) 691 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 692 693 return ret; 694} 695 696static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 697 const struct bridge_vlan_info *last, 698 struct netlink_ext_ack *extack) 699{ 700 /* pvid flag is not allowed in ranges */ 701 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 702 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 703 return false; 704 } 705 706 /* when cur is the range end, check if: 707 * - it has range start flag 708 * - range ids are invalid (end is equal to or before start) 709 */ 710 if (last) { 711 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 712 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 713 return false; 714 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 715 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 716 return false; 717 } else if (cur->vid <= last->vid) { 718 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 719 return false; 720 } 721 } 722 723 /* check for required range flags */ 724 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 725 BRIDGE_VLAN_INFO_RANGE_END))) { 726 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 727 return false; 728 } 729 730 return true; 731} 732 733static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 734{ 735 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 736 737#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 738 if (!br_vlan_is_master(v)) 739 mcast_router = v->port_mcast_ctx.multicast_router; 740 else 741 mcast_router = v->br_mcast_ctx.multicast_router; 742#endif 743 744 return mcast_router; 745} 746 747static inline int br_afspec_cmd_to_rtm(int cmd) 748{ 749 switch (cmd) { 750 case RTM_SETLINK: 751 return RTM_NEWVLAN; 752 case RTM_DELLINK: 753 return RTM_DELVLAN; 754 } 755 756 return 0; 757} 758 759static inline int br_opt_get(const struct net_bridge *br, 760 enum net_bridge_opts opt) 761{ 762 return test_bit(opt, &br->options); 763} 764 765int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 766 struct netlink_ext_ack *extack); 767int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 768int br_boolopt_multi_toggle(struct net_bridge *br, 769 struct br_boolopt_multi *bm, 770 struct netlink_ext_ack *extack); 771void br_boolopt_multi_get(const struct net_bridge *br, 772 struct br_boolopt_multi *bm); 773void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 774 775#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 776static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 777{ 778 struct tc_skb_ext *ext; 779 780 if (!tc_skb_ext_tc_enabled()) 781 return; 782 783 ext = skb_ext_find(skb, TC_SKB_EXT); 784 if (ext) { 785 ext->l2_miss = miss; 786 return; 787 } 788 if (!miss) 789 return; 790 ext = tc_skb_ext_alloc(skb); 791 if (!ext) 792 return; 793 ext->l2_miss = true; 794} 795#else 796static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 797{ 798} 799#endif 800 801/* br_device.c */ 802void br_dev_setup(struct net_device *dev); 803void br_dev_delete(struct net_device *dev, struct list_head *list); 804netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 805#ifdef CONFIG_NET_POLL_CONTROLLER 806static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 807 struct sk_buff *skb) 808{ 809 netpoll_send_skb(p->np, skb); 810} 811 812int br_netpoll_enable(struct net_bridge_port *p); 813void br_netpoll_disable(struct net_bridge_port *p); 814#else 815static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 816 struct sk_buff *skb) 817{ 818} 819 820static inline int br_netpoll_enable(struct net_bridge_port *p) 821{ 822 return 0; 823} 824 825static inline void br_netpoll_disable(struct net_bridge_port *p) 826{ 827} 828#endif 829 830/* br_fdb.c */ 831#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 832#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 833#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 834 NTF_STICKY | NTF_OFFLOADED) 835 836int br_fdb_init(void); 837void br_fdb_fini(void); 838int br_fdb_hash_init(struct net_bridge *br); 839void br_fdb_hash_fini(struct net_bridge *br); 840void br_fdb_flush(struct net_bridge *br, 841 const struct net_bridge_fdb_flush_desc *desc); 842void br_fdb_find_delete_local(struct net_bridge *br, 843 const struct net_bridge_port *p, 844 const unsigned char *addr, u16 vid); 845void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 846void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 847void br_fdb_cleanup(struct work_struct *work); 848int br_fdb_toggle_local_vlan_0(struct net_bridge *br, bool on, 849 struct netlink_ext_ack *extack); 850void br_fdb_delete_by_port(struct net_bridge *br, 851 const struct net_bridge_port *p, u16 vid, int do_all); 852struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 853 const unsigned char *addr, 854 __u16 vid); 855int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 856int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 857 unsigned long off); 858int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 859 const unsigned char *addr, u16 vid); 860void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 861 const unsigned char *addr, u16 vid, unsigned long flags); 862 863int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 864 struct net_device *dev, const unsigned char *addr, u16 vid, 865 bool *notified, struct netlink_ext_ack *extack); 866int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev, 867 struct netlink_ext_ack *extack); 868int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 869 const unsigned char *addr, u16 vid, u16 nlh_flags, 870 bool *notified, struct netlink_ext_ack *extack); 871int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 872 struct net_device *dev, struct net_device *fdev, int *idx); 873int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 874 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 875 struct netlink_ext_ack *extack); 876int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 877void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 878int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 879 const unsigned char *addr, u16 vid, 880 bool locked, bool swdev_notify); 881int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 882 const unsigned char *addr, u16 vid, 883 bool swdev_notify); 884void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 885 const unsigned char *addr, u16 vid, bool offloaded); 886 887/* br_forward.c */ 888enum br_pkt_type { 889 BR_PKT_UNICAST, 890 BR_PKT_MULTICAST, 891 BR_PKT_BROADCAST 892}; 893int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 894void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 895 bool local_rcv, bool local_orig); 896int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 897void br_flood(struct net_bridge *br, struct sk_buff *skb, 898 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig, 899 u16 vid); 900 901/* return true if both source port and dest port are isolated */ 902static inline bool br_skb_isolated(const struct net_bridge_port *to, 903 const struct sk_buff *skb) 904{ 905 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 906 (to->flags & BR_ISOLATED); 907} 908 909/* br_if.c */ 910void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 911int br_add_bridge(struct net *net, const char *name); 912int br_del_bridge(struct net *net, const char *name); 913int br_add_if(struct net_bridge *br, struct net_device *dev, 914 struct netlink_ext_ack *extack); 915int br_del_if(struct net_bridge *br, struct net_device *dev); 916void br_mtu_auto_adjust(struct net_bridge *br); 917netdev_features_t br_features_recompute(struct net_bridge *br, 918 netdev_features_t features); 919void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 920void br_manage_promisc(struct net_bridge *br); 921int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 922 923/* br_input.c */ 924int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 925rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 926 927struct br_frame_type { 928 __be16 type; 929 int (*frame_handler)(struct net_bridge_port *port, 930 struct sk_buff *skb); 931 struct hlist_node list; 932}; 933 934void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 935void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 936 937static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 938{ 939 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 940} 941 942static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 943{ 944 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 945} 946 947static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 948{ 949 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 950} 951 952static inline struct net_bridge_port * 953br_port_get_check_rtnl(const struct net_device *dev) 954{ 955 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 956} 957 958/* br_ioctl.c */ 959int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 960 void __user *data, int cmd); 961int br_ioctl_stub(struct net *net, unsigned int cmd, void __user *uarg); 962 963/* br_multicast.c */ 964#ifdef CONFIG_BRIDGE_IGMP_SNOOPING 965int br_multicast_rcv(struct net_bridge_mcast **brmctx, 966 struct net_bridge_mcast_port **pmctx, 967 struct net_bridge_vlan *vlan, 968 struct sk_buff *skb, u16 vid); 969struct net_bridge_mdb_entry * 970br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 971 u16 vid); 972int br_multicast_add_port(struct net_bridge_port *port); 973void br_multicast_del_port(struct net_bridge_port *port); 974void br_multicast_enable_port(struct net_bridge_port *port); 975void br_multicast_disable_port(struct net_bridge_port *port); 976void br_multicast_init(struct net_bridge *br); 977void br_multicast_join_snoopers(struct net_bridge *br); 978void br_multicast_leave_snoopers(struct net_bridge *br); 979void br_multicast_open(struct net_bridge *br); 980void br_multicast_stop(struct net_bridge *br); 981void br_multicast_dev_del(struct net_bridge *br); 982void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 983 struct net_bridge_mcast *brmctx, 984 bool local_rcv, bool local_orig); 985int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 986int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 987 unsigned long val); 988int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 989int br_multicast_toggle(struct net_bridge *br, unsigned long val, 990 struct netlink_ext_ack *extack); 991int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 992int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 993 unsigned long val); 994#if IS_ENABLED(CONFIG_IPV6) 995int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 996 unsigned long val); 997#endif 998struct net_bridge_mdb_entry * 999br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 1000struct net_bridge_mdb_entry * 1001br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 1002struct net_bridge_port_group * 1003br_multicast_new_port_group(struct net_bridge_port *port, 1004 const struct br_ip *group, 1005 struct net_bridge_port_group __rcu *next, 1006 unsigned char flags, const unsigned char *src, 1007 u8 filter_mode, u8 rt_protocol, 1008 struct netlink_ext_ack *extack); 1009void br_multicast_del_port_group(struct net_bridge_port_group *p); 1010int br_mdb_hash_init(struct net_bridge *br); 1011void br_mdb_hash_fini(struct net_bridge *br); 1012void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1013 struct net_bridge_port_group *pg, int type); 1014void br_mdb_flag_change_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1015 struct net_bridge_port_group *pg); 1016void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 1017 int type); 1018void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 1019 struct net_bridge_port_group *pg, 1020 struct net_bridge_port_group __rcu **pp); 1021void br_multicast_count(struct net_bridge *br, 1022 const struct net_bridge_port *p, 1023 const struct sk_buff *skb, u8 type, u8 dir); 1024int br_multicast_init_stats(struct net_bridge *br); 1025void br_multicast_uninit_stats(struct net_bridge *br); 1026void br_multicast_get_stats(const struct net_bridge *br, 1027 const struct net_bridge_port *p, 1028 struct br_mcast_stats *dest); 1029u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 1030void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 1031u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 1032int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 1033 struct netlink_ext_ack *extack); 1034int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1035 struct netlink_ext_ack *extack); 1036int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1037 struct netlink_ext_ack *extack); 1038int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1039 struct netlink_callback *cb); 1040int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq, 1041 struct netlink_ext_ack *extack); 1042void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 1043 struct net_bridge_mdb_entry *mp, bool notify); 1044void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 1045void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 1046 u8 filter_mode); 1047void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 1048 struct net_bridge_port_group *sg); 1049struct net_bridge_group_src * 1050br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1051struct net_bridge_group_src * 1052br_multicast_new_group_src(struct net_bridge_port_group *pg, 1053 struct br_ip *src_ip); 1054void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1055void br_multicast_del_group_src(struct net_bridge_group_src *src, 1056 bool fastleave); 1057void br_multicast_ctx_init(struct net_bridge *br, 1058 struct net_bridge_vlan *vlan, 1059 struct net_bridge_mcast *brmctx); 1060void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1061void br_multicast_port_ctx_init(struct net_bridge_port *port, 1062 struct net_bridge_vlan *vlan, 1063 struct net_bridge_mcast_port *pmctx); 1064void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1065void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, u8 state); 1066void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1067int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1068 struct netlink_ext_ack *extack); 1069bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1070 1071int br_rports_fill_info(struct sk_buff *skb, 1072 const struct net_bridge_mcast *brmctx); 1073int br_multicast_dump_querier_state(struct sk_buff *skb, 1074 const struct net_bridge_mcast *brmctx, 1075 int nest_attr); 1076size_t br_multicast_querier_state_size(void); 1077size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1078void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1079 unsigned long val); 1080void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1081 unsigned long val); 1082 1083static inline bool br_group_is_l2(const struct br_ip *group) 1084{ 1085 return group->proto == 0; 1086} 1087 1088#define mlock_dereference(X, br) \ 1089 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1090 1091static inline struct hlist_node * 1092br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1093 struct sk_buff *skb) 1094{ 1095#if IS_ENABLED(CONFIG_IPV6) 1096 if (skb->protocol == htons(ETH_P_IPV6)) 1097 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1098#endif 1099 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1100} 1101 1102static inline struct net_bridge_port * 1103br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1104{ 1105 struct net_bridge_mcast_port *mctx; 1106 1107#if IS_ENABLED(CONFIG_IPV6) 1108 if (skb->protocol == htons(ETH_P_IPV6)) 1109 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1110 ip6_rlist); 1111 else 1112#endif 1113 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1114 ip4_rlist); 1115 1116 if (mctx) 1117 return mctx->port; 1118 else 1119 return NULL; 1120} 1121 1122static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1123{ 1124 return timer_pending(&brmctx->ip4_mc_router_timer); 1125} 1126 1127static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1128{ 1129#if IS_ENABLED(CONFIG_IPV6) 1130 return timer_pending(&brmctx->ip6_mc_router_timer); 1131#else 1132 return false; 1133#endif 1134} 1135 1136static inline bool 1137br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1138{ 1139 switch (brmctx->multicast_router) { 1140 case MDB_RTR_TYPE_PERM: 1141 return true; 1142 case MDB_RTR_TYPE_TEMP_QUERY: 1143 if (skb) { 1144 if (skb->protocol == htons(ETH_P_IP)) 1145 return br_ip4_multicast_is_router(brmctx); 1146 else if (skb->protocol == htons(ETH_P_IPV6)) 1147 return br_ip6_multicast_is_router(brmctx); 1148 } else { 1149 return br_ip4_multicast_is_router(brmctx) || 1150 br_ip6_multicast_is_router(brmctx); 1151 } 1152 fallthrough; 1153 default: 1154 return false; 1155 } 1156} 1157 1158static inline bool 1159__br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1160 struct bridge_mcast_other_query *querier, 1161 const bool is_ipv6) 1162{ 1163 bool own_querier_enabled; 1164 1165 if (brmctx->multicast_querier) { 1166 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1167 own_querier_enabled = false; 1168 else 1169 own_querier_enabled = true; 1170 } else { 1171 own_querier_enabled = false; 1172 } 1173 1174 return !timer_pending(&querier->delay_timer) && 1175 (own_querier_enabled || timer_pending(&querier->timer)); 1176} 1177 1178static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1179 struct ethhdr *eth, 1180 const struct net_bridge_mdb_entry *mdb) 1181{ 1182 switch (eth->h_proto) { 1183 case (htons(ETH_P_IP)): 1184 return __br_multicast_querier_exists(brmctx, 1185 &brmctx->ip4_other_query, false); 1186#if IS_ENABLED(CONFIG_IPV6) 1187 case (htons(ETH_P_IPV6)): 1188 return __br_multicast_querier_exists(brmctx, 1189 &brmctx->ip6_other_query, true); 1190#endif 1191 default: 1192 return !!mdb && br_group_is_l2(&mdb->addr); 1193 } 1194} 1195 1196static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1197{ 1198 switch (ip->proto) { 1199 case htons(ETH_P_IP): 1200 return ipv4_is_zeronet(ip->src.ip4); 1201#if IS_ENABLED(CONFIG_IPV6) 1202 case htons(ETH_P_IPV6): 1203 return ipv6_addr_any(&ip->src.ip6); 1204#endif 1205 default: 1206 return false; 1207 } 1208} 1209 1210static inline bool 1211br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1212 __be16 proto) 1213{ 1214 switch (proto) { 1215 case htons(ETH_P_IP): 1216 return !!(brmctx->multicast_igmp_version == 3); 1217#if IS_ENABLED(CONFIG_IPV6) 1218 case htons(ETH_P_IPV6): 1219 return !!(brmctx->multicast_mld_version == 2); 1220#endif 1221 default: 1222 return false; 1223 } 1224} 1225 1226static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1227{ 1228 return BR_INPUT_SKB_CB(skb)->igmp; 1229} 1230 1231static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1232{ 1233 return brmctx->multicast_last_member_interval * 1234 brmctx->multicast_last_member_count; 1235} 1236 1237static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1238{ 1239 return brmctx->multicast_membership_interval; 1240} 1241 1242static inline bool 1243br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1244{ 1245 return !!brmctx->vlan; 1246} 1247 1248static inline bool 1249br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1250{ 1251 return !!pmctx->vlan; 1252} 1253 1254static inline struct net_bridge_mcast * 1255br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1256{ 1257 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1258 return &pmctx->port->br->multicast_ctx; 1259 else 1260 return &pmctx->vlan->brvlan->br_mcast_ctx; 1261} 1262 1263static inline bool 1264br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1265{ 1266 return br_multicast_ctx_is_vlan(brmctx) && 1267 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1268 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1269} 1270 1271static inline bool 1272br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1273{ 1274 return br_multicast_ctx_is_vlan(brmctx) && 1275 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1276} 1277 1278static inline bool 1279br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1280{ 1281 return br_multicast_port_ctx_is_vlan(pmctx) && 1282 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1283} 1284 1285static inline bool 1286br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1287{ 1288 return pmctx->port->state == BR_STATE_DISABLED || 1289 (br_multicast_port_ctx_is_vlan(pmctx) && 1290 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1291 pmctx->vlan->state == BR_STATE_DISABLED)); 1292} 1293 1294static inline bool 1295br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1296{ 1297 return br_multicast_port_ctx_state_disabled(pmctx) || 1298 pmctx->port->state == BR_STATE_BLOCKING || 1299 (br_multicast_port_ctx_is_vlan(pmctx) && 1300 pmctx->vlan->state == BR_STATE_BLOCKING); 1301} 1302 1303static inline bool 1304br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1305{ 1306#if IS_ENABLED(CONFIG_IPV6) 1307 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1308 !hlist_empty(&brmctx->ip6_mc_router_list); 1309#else 1310 return !hlist_empty(&brmctx->ip4_mc_router_list); 1311#endif 1312} 1313 1314static inline bool 1315br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1316 const struct net_bridge_mcast *brmctx2) 1317{ 1318 return brmctx1->multicast_igmp_version == 1319 brmctx2->multicast_igmp_version && 1320 brmctx1->multicast_last_member_count == 1321 brmctx2->multicast_last_member_count && 1322 brmctx1->multicast_startup_query_count == 1323 brmctx2->multicast_startup_query_count && 1324 brmctx1->multicast_last_member_interval == 1325 brmctx2->multicast_last_member_interval && 1326 brmctx1->multicast_membership_interval == 1327 brmctx2->multicast_membership_interval && 1328 brmctx1->multicast_querier_interval == 1329 brmctx2->multicast_querier_interval && 1330 brmctx1->multicast_query_interval == 1331 brmctx2->multicast_query_interval && 1332 brmctx1->multicast_query_response_interval == 1333 brmctx2->multicast_query_response_interval && 1334 brmctx1->multicast_startup_query_interval == 1335 brmctx2->multicast_startup_query_interval && 1336 brmctx1->multicast_querier == brmctx2->multicast_querier && 1337 brmctx1->multicast_router == brmctx2->multicast_router && 1338 !br_rports_have_mc_router(brmctx1) && 1339 !br_rports_have_mc_router(brmctx2) && 1340#if IS_ENABLED(CONFIG_IPV6) 1341 brmctx1->multicast_mld_version == 1342 brmctx2->multicast_mld_version && 1343#endif 1344 true; 1345} 1346 1347static inline bool 1348br_multicast_port_ctx_options_equal(const struct net_bridge_mcast_port *pmctx1, 1349 const struct net_bridge_mcast_port *pmctx2) 1350{ 1351 return br_multicast_ngroups_get(pmctx1) == 1352 br_multicast_ngroups_get(pmctx2) && 1353 br_multicast_ngroups_get_max(pmctx1) == 1354 br_multicast_ngroups_get_max(pmctx2); 1355} 1356 1357static inline bool 1358br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1359{ 1360 bool vlan_snooping_enabled; 1361 1362 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1363 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1364 1365 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1366} 1367 1368static inline void 1369br_multicast_set_pg_offload_flags(struct net_bridge_port_group *p, 1370 bool offloaded) 1371{ 1372 p->flags &= ~(MDB_PG_FLAGS_OFFLOAD | MDB_PG_FLAGS_OFFLOAD_FAILED); 1373 p->flags |= (offloaded ? MDB_PG_FLAGS_OFFLOAD : 1374 MDB_PG_FLAGS_OFFLOAD_FAILED); 1375} 1376 1377static inline bool 1378br_mdb_should_notify(const struct net_bridge *br, u8 changed_flags) 1379{ 1380 return br_opt_get(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION) && 1381 (changed_flags & MDB_PG_FLAGS_OFFLOAD_FAILED); 1382} 1383#else 1384static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1385 struct net_bridge_mcast_port **pmctx, 1386 struct net_bridge_vlan *vlan, 1387 struct sk_buff *skb, 1388 u16 vid) 1389{ 1390 return 0; 1391} 1392 1393static inline struct net_bridge_mdb_entry * 1394br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 1395 u16 vid) 1396{ 1397 return NULL; 1398} 1399 1400static inline int br_multicast_add_port(struct net_bridge_port *port) 1401{ 1402 return 0; 1403} 1404 1405static inline void br_multicast_del_port(struct net_bridge_port *port) 1406{ 1407} 1408 1409static inline void br_multicast_enable_port(struct net_bridge_port *port) 1410{ 1411} 1412 1413static inline void br_multicast_disable_port(struct net_bridge_port *port) 1414{ 1415} 1416 1417static inline void br_multicast_init(struct net_bridge *br) 1418{ 1419} 1420 1421static inline void br_multicast_join_snoopers(struct net_bridge *br) 1422{ 1423} 1424 1425static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1426{ 1427} 1428 1429static inline void br_multicast_open(struct net_bridge *br) 1430{ 1431} 1432 1433static inline void br_multicast_stop(struct net_bridge *br) 1434{ 1435} 1436 1437static inline void br_multicast_dev_del(struct net_bridge *br) 1438{ 1439} 1440 1441static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1442 struct sk_buff *skb, 1443 struct net_bridge_mcast *brmctx, 1444 bool local_rcv, bool local_orig) 1445{ 1446} 1447 1448static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1449 struct sk_buff *skb) 1450{ 1451 return false; 1452} 1453 1454static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1455 struct ethhdr *eth, 1456 const struct net_bridge_mdb_entry *mdb) 1457{ 1458 return false; 1459} 1460 1461static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1462 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1463{ 1464 return -EOPNOTSUPP; 1465} 1466 1467static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1468 struct netlink_ext_ack *extack) 1469{ 1470 return -EOPNOTSUPP; 1471} 1472 1473static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1474 struct netlink_ext_ack *extack) 1475{ 1476 return -EOPNOTSUPP; 1477} 1478 1479static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1480 struct netlink_callback *cb) 1481{ 1482 return 0; 1483} 1484 1485static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[], 1486 u32 portid, u32 seq, 1487 struct netlink_ext_ack *extack) 1488{ 1489 return -EOPNOTSUPP; 1490} 1491 1492static inline int br_mdb_hash_init(struct net_bridge *br) 1493{ 1494 return 0; 1495} 1496 1497static inline void br_mdb_hash_fini(struct net_bridge *br) 1498{ 1499} 1500 1501static inline void br_multicast_count(struct net_bridge *br, 1502 const struct net_bridge_port *p, 1503 const struct sk_buff *skb, 1504 u8 type, u8 dir) 1505{ 1506} 1507 1508static inline int br_multicast_init_stats(struct net_bridge *br) 1509{ 1510 return 0; 1511} 1512 1513static inline void br_multicast_uninit_stats(struct net_bridge *br) 1514{ 1515} 1516 1517static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1518{ 1519 return 0; 1520} 1521 1522static inline void br_multicast_ctx_init(struct net_bridge *br, 1523 struct net_bridge_vlan *vlan, 1524 struct net_bridge_mcast *brmctx) 1525{ 1526} 1527 1528static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1529{ 1530} 1531 1532static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1533 struct net_bridge_vlan *vlan, 1534 struct net_bridge_mcast_port *pmctx) 1535{ 1536} 1537 1538static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1539{ 1540} 1541 1542static inline void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, 1543 u8 state) 1544{ 1545} 1546 1547static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1548 bool on) 1549{ 1550} 1551 1552static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1553 bool on, 1554 struct netlink_ext_ack *extack) 1555{ 1556 return -EOPNOTSUPP; 1557} 1558 1559static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1560 bool on) 1561{ 1562 return false; 1563} 1564 1565static inline bool 1566br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1567 const struct net_bridge_mcast *brmctx2) 1568{ 1569 return true; 1570} 1571#endif 1572 1573/* br_vlan.c */ 1574#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1575bool br_allowed_ingress(const struct net_bridge *br, 1576 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1577 u16 *vid, u8 *state, 1578 struct net_bridge_vlan **vlan); 1579bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1580 const struct sk_buff *skb); 1581bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1582struct sk_buff *br_handle_vlan(struct net_bridge *br, 1583 const struct net_bridge_port *port, 1584 struct net_bridge_vlan_group *vg, 1585 struct sk_buff *skb); 1586int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1587 bool *changed, struct netlink_ext_ack *extack); 1588int br_vlan_delete(struct net_bridge *br, u16 vid); 1589void br_vlan_flush(struct net_bridge *br); 1590struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1591void br_recalculate_fwd_mask(struct net_bridge *br); 1592int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1593 struct netlink_ext_ack *extack); 1594int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1595 struct netlink_ext_ack *extack); 1596int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1597 struct netlink_ext_ack *extack); 1598int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1599int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1600int br_vlan_init(struct net_bridge *br); 1601int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1602 struct netlink_ext_ack *extack); 1603int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1604 struct netlink_ext_ack *extack); 1605int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1606 bool *changed, struct netlink_ext_ack *extack); 1607int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1608void nbp_vlan_flush(struct net_bridge_port *port); 1609int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1610int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1611void br_vlan_get_stats(const struct net_bridge_vlan *v, 1612 struct pcpu_sw_netstats *stats); 1613void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1614int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1615 void *ptr); 1616void br_vlan_vlan_upper_event(struct net_device *br_dev, 1617 struct net_device *vlan_dev, 1618 unsigned long event); 1619int br_vlan_rtnl_init(void); 1620void br_vlan_rtnl_uninit(void); 1621void br_vlan_notify(const struct net_bridge *br, 1622 const struct net_bridge_port *p, 1623 u16 vid, u16 vid_range, 1624 int cmd); 1625bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1626 const struct net_bridge_vlan *range_end); 1627 1628void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1629 struct net_device_path_ctx *ctx, 1630 struct net_device_path *path); 1631int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1632 struct net_bridge_port *dst, 1633 struct net_device_path *path); 1634 1635static inline struct net_bridge_vlan_group *br_vlan_group( 1636 const struct net_bridge *br) 1637{ 1638 return rtnl_dereference(br->vlgrp); 1639} 1640 1641static inline struct net_bridge_vlan_group *nbp_vlan_group( 1642 const struct net_bridge_port *p) 1643{ 1644 return rtnl_dereference(p->vlgrp); 1645} 1646 1647static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1648 const struct net_bridge *br) 1649{ 1650 return rcu_dereference(br->vlgrp); 1651} 1652 1653static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1654 const struct net_bridge_port *p) 1655{ 1656 return rcu_dereference(p->vlgrp); 1657} 1658 1659/* Since bridge now depends on 8021Q module, but the time bridge sees the 1660 * skb, the vlan tag will always be present if the frame was tagged. 1661 */ 1662static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1663{ 1664 int err = 0; 1665 1666 if (skb_vlan_tag_present(skb)) { 1667 *vid = skb_vlan_tag_get_id(skb); 1668 } else { 1669 *vid = 0; 1670 err = -EINVAL; 1671 } 1672 1673 return err; 1674} 1675 1676static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1677{ 1678 if (!vg) 1679 return 0; 1680 1681 smp_rmb(); 1682 return vg->pvid; 1683} 1684 1685static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1686{ 1687 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1688} 1689#else 1690static inline bool br_allowed_ingress(const struct net_bridge *br, 1691 struct net_bridge_vlan_group *vg, 1692 struct sk_buff *skb, 1693 u16 *vid, u8 *state, 1694 struct net_bridge_vlan **vlan) 1695 1696{ 1697 *vlan = NULL; 1698 return true; 1699} 1700 1701static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1702 const struct sk_buff *skb) 1703{ 1704 return true; 1705} 1706 1707static inline bool br_should_learn(struct net_bridge_port *p, 1708 struct sk_buff *skb, u16 *vid) 1709{ 1710 return true; 1711} 1712 1713static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1714 const struct net_bridge_port *port, 1715 struct net_bridge_vlan_group *vg, 1716 struct sk_buff *skb) 1717{ 1718 return skb; 1719} 1720 1721static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1722 bool *changed, struct netlink_ext_ack *extack) 1723{ 1724 *changed = false; 1725 return -EOPNOTSUPP; 1726} 1727 1728static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1729{ 1730 return -EOPNOTSUPP; 1731} 1732 1733static inline void br_vlan_flush(struct net_bridge *br) 1734{ 1735} 1736 1737static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1738{ 1739} 1740 1741static inline int br_vlan_init(struct net_bridge *br) 1742{ 1743 return 0; 1744} 1745 1746static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1747 bool *changed, struct netlink_ext_ack *extack) 1748{ 1749 *changed = false; 1750 return -EOPNOTSUPP; 1751} 1752 1753static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1754{ 1755 return -EOPNOTSUPP; 1756} 1757 1758static inline void nbp_vlan_flush(struct net_bridge_port *port) 1759{ 1760} 1761 1762static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1763 u16 vid) 1764{ 1765 return NULL; 1766} 1767 1768static inline int nbp_vlan_init(struct net_bridge_port *port, 1769 struct netlink_ext_ack *extack) 1770{ 1771 return 0; 1772} 1773 1774static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1775{ 1776 return 0; 1777} 1778 1779static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1780{ 1781 return 0; 1782} 1783 1784static inline int br_vlan_filter_toggle(struct net_bridge *br, 1785 unsigned long val, 1786 struct netlink_ext_ack *extack) 1787{ 1788 return -EOPNOTSUPP; 1789} 1790 1791static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1792 u32 filter_mask) 1793{ 1794 return 0; 1795} 1796 1797static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1798 struct net_device_path_ctx *ctx, 1799 struct net_device_path *path) 1800{ 1801} 1802 1803static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1804 struct net_bridge_port *dst, 1805 struct net_device_path *path) 1806{ 1807 return 0; 1808} 1809 1810static inline struct net_bridge_vlan_group *br_vlan_group( 1811 const struct net_bridge *br) 1812{ 1813 return NULL; 1814} 1815 1816static inline struct net_bridge_vlan_group *nbp_vlan_group( 1817 const struct net_bridge_port *p) 1818{ 1819 return NULL; 1820} 1821 1822static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1823 const struct net_bridge *br) 1824{ 1825 return NULL; 1826} 1827 1828static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1829 const struct net_bridge_port *p) 1830{ 1831 return NULL; 1832} 1833 1834static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1835 struct pcpu_sw_netstats *stats) 1836{ 1837} 1838 1839static inline void br_vlan_port_event(struct net_bridge_port *p, 1840 unsigned long event) 1841{ 1842} 1843 1844static inline int br_vlan_bridge_event(struct net_device *dev, 1845 unsigned long event, void *ptr) 1846{ 1847 return 0; 1848} 1849 1850static inline void br_vlan_vlan_upper_event(struct net_device *br_dev, 1851 struct net_device *vlan_dev, 1852 unsigned long event) 1853{ 1854} 1855 1856static inline int br_vlan_rtnl_init(void) 1857{ 1858 return 0; 1859} 1860 1861static inline void br_vlan_rtnl_uninit(void) 1862{ 1863} 1864 1865static inline void br_vlan_notify(const struct net_bridge *br, 1866 const struct net_bridge_port *p, 1867 u16 vid, u16 vid_range, 1868 int cmd) 1869{ 1870} 1871 1872static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1873 const struct net_bridge_vlan *range_end) 1874{ 1875 return true; 1876} 1877 1878static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1879{ 1880 return 0; 1881} 1882 1883#endif 1884 1885/* br_vlan_options.c */ 1886#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1887bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1888 const struct net_bridge_vlan *range_end); 1889bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1890 const struct net_bridge_port *p); 1891size_t br_vlan_opts_nl_size(void); 1892int br_vlan_process_options(const struct net_bridge *br, 1893 const struct net_bridge_port *p, 1894 struct net_bridge_vlan *range_start, 1895 struct net_bridge_vlan *range_end, 1896 struct nlattr **tb, 1897 struct netlink_ext_ack *extack); 1898int br_vlan_rtm_process_global_options(struct net_device *dev, 1899 const struct nlattr *attr, 1900 int cmd, 1901 struct netlink_ext_ack *extack); 1902bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1903 const struct net_bridge_vlan *r_end); 1904bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1905 const struct net_bridge_vlan *v_opts); 1906 1907/* vlan state manipulation helpers using *_ONCE to annotate lock-free access, 1908 * while br_vlan_set_state() may access data protected by multicast_lock. 1909 */ 1910static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1911{ 1912 return READ_ONCE(v->state); 1913} 1914 1915static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1916{ 1917 WRITE_ONCE(v->state, state); 1918 br_multicast_update_vlan_mcast_ctx(v, state); 1919} 1920 1921static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1922{ 1923 return READ_ONCE(vg->pvid_state); 1924} 1925 1926static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1927 u8 state) 1928{ 1929 WRITE_ONCE(vg->pvid_state, state); 1930} 1931 1932/* learn_allow is true at ingress and false at egress */ 1933static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1934{ 1935 switch (state) { 1936 case BR_STATE_LEARNING: 1937 return learn_allow; 1938 case BR_STATE_FORWARDING: 1939 return true; 1940 default: 1941 return false; 1942 } 1943} 1944#endif 1945 1946/* br_mst.c */ 1947#ifdef CONFIG_BRIDGE_VLAN_FILTERING 1948DECLARE_STATIC_KEY_FALSE(br_mst_used); 1949static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1950{ 1951 /* check the port's vlan group to avoid racing with port deletion */ 1952 return static_branch_unlikely(&br_mst_used) && 1953 br_opt_get(p->br, BROPT_MST_ENABLED) && 1954 rcu_access_pointer(p->vlgrp); 1955} 1956 1957int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1958 struct netlink_ext_ack *extack); 1959int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1960void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1961int br_mst_set_enabled(struct net_bridge *br, bool on, 1962 struct netlink_ext_ack *extack); 1963size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1964int br_mst_fill_info(struct sk_buff *skb, 1965 const struct net_bridge_vlan_group *vg); 1966int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1967 struct netlink_ext_ack *extack); 1968void br_mst_uninit(struct net_bridge *br); 1969#else 1970static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1971{ 1972 return false; 1973} 1974 1975static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1976 u8 state, struct netlink_ext_ack *extack) 1977{ 1978 return -EOPNOTSUPP; 1979} 1980 1981static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1982 struct netlink_ext_ack *extack) 1983{ 1984 return -EOPNOTSUPP; 1985} 1986 1987static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1988{ 1989 return 0; 1990} 1991 1992static inline int br_mst_fill_info(struct sk_buff *skb, 1993 const struct net_bridge_vlan_group *vg) 1994{ 1995 return -EOPNOTSUPP; 1996} 1997 1998static inline int br_mst_process(struct net_bridge_port *p, 1999 const struct nlattr *mst_attr, 2000 struct netlink_ext_ack *extack) 2001{ 2002 return -EOPNOTSUPP; 2003} 2004 2005static inline void br_mst_uninit(struct net_bridge *br) 2006{ 2007} 2008#endif 2009 2010struct nf_br_ops { 2011 int (*br_dev_xmit_hook)(struct sk_buff *skb); 2012}; 2013extern const struct nf_br_ops __rcu *nf_br_ops; 2014 2015/* br_netfilter.c */ 2016#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 2017int br_nf_core_init(void); 2018void br_nf_core_fini(void); 2019void br_netfilter_rtable_init(struct net_bridge *); 2020#else 2021static inline int br_nf_core_init(void) { return 0; } 2022static inline void br_nf_core_fini(void) {} 2023#define br_netfilter_rtable_init(x) 2024#endif 2025 2026/* br_stp.c */ 2027void br_set_state(struct net_bridge_port *p, unsigned int state); 2028struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 2029void br_init_port(struct net_bridge_port *p); 2030void br_become_designated_port(struct net_bridge_port *p); 2031 2032void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 2033int br_set_forward_delay(struct net_bridge *br, unsigned long x); 2034int br_set_hello_time(struct net_bridge *br, unsigned long x); 2035int br_set_max_age(struct net_bridge *br, unsigned long x); 2036int __set_ageing_time(struct net_device *dev, unsigned long t); 2037int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 2038 2039 2040/* br_stp_if.c */ 2041void br_stp_enable_bridge(struct net_bridge *br); 2042void br_stp_disable_bridge(struct net_bridge *br); 2043int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 2044 struct netlink_ext_ack *extack); 2045void br_stp_enable_port(struct net_bridge_port *p); 2046void br_stp_disable_port(struct net_bridge_port *p); 2047bool br_stp_recalculate_bridge_id(struct net_bridge *br); 2048void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 2049void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 2050int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 2051int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 2052ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 2053 2054/* br_stp_bpdu.c */ 2055struct stp_proto; 2056void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 2057 struct net_device *dev); 2058 2059/* br_stp_timer.c */ 2060void br_stp_timer_init(struct net_bridge *br); 2061void br_stp_port_timer_init(struct net_bridge_port *p); 2062unsigned long br_timer_value(const struct timer_list *timer); 2063 2064/* br.c */ 2065#if IS_ENABLED(CONFIG_ATM_LANE) 2066extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 2067#endif 2068 2069/* br_mrp.c */ 2070#if IS_ENABLED(CONFIG_BRIDGE_MRP) 2071int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2072 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2073bool br_mrp_enabled(struct net_bridge *br); 2074void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 2075int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 2076#else 2077static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2078 struct nlattr *attr, int cmd, 2079 struct netlink_ext_ack *extack) 2080{ 2081 return -EOPNOTSUPP; 2082} 2083 2084static inline bool br_mrp_enabled(struct net_bridge *br) 2085{ 2086 return false; 2087} 2088 2089static inline void br_mrp_port_del(struct net_bridge *br, 2090 struct net_bridge_port *p) 2091{ 2092} 2093 2094static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 2095{ 2096 return 0; 2097} 2098 2099#endif 2100 2101/* br_cfm.c */ 2102#if IS_ENABLED(CONFIG_BRIDGE_CFM) 2103int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2104 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2105bool br_cfm_created(struct net_bridge *br); 2106void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 2107int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 2108int br_cfm_status_fill_info(struct sk_buff *skb, 2109 struct net_bridge *br, 2110 bool getlink); 2111int br_cfm_mep_count(struct net_bridge *br, u32 *count); 2112int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 2113#else 2114static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2115 struct nlattr *attr, int cmd, 2116 struct netlink_ext_ack *extack) 2117{ 2118 return -EOPNOTSUPP; 2119} 2120 2121static inline bool br_cfm_created(struct net_bridge *br) 2122{ 2123 return false; 2124} 2125 2126static inline void br_cfm_port_del(struct net_bridge *br, 2127 struct net_bridge_port *p) 2128{ 2129} 2130 2131static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2132{ 2133 return -EOPNOTSUPP; 2134} 2135 2136static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2137 struct net_bridge *br, 2138 bool getlink) 2139{ 2140 return -EOPNOTSUPP; 2141} 2142 2143static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2144{ 2145 *count = 0; 2146 return -EOPNOTSUPP; 2147} 2148 2149static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2150{ 2151 *count = 0; 2152 return -EOPNOTSUPP; 2153} 2154#endif 2155 2156/* br_netlink.c */ 2157extern struct rtnl_link_ops br_link_ops; 2158int br_netlink_init(void); 2159void br_netlink_fini(void); 2160void br_ifinfo_notify(int event, const struct net_bridge *br, 2161 const struct net_bridge_port *port); 2162void br_info_notify(int event, const struct net_bridge *br, 2163 const struct net_bridge_port *port, u32 filter); 2164int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2165 struct netlink_ext_ack *extack); 2166int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2167int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2168 u32 filter_mask, int nlflags); 2169int br_process_vlan_info(struct net_bridge *br, 2170 struct net_bridge_port *p, int cmd, 2171 struct bridge_vlan_info *vinfo_curr, 2172 struct bridge_vlan_info **vinfo_last, 2173 bool *changed, 2174 struct netlink_ext_ack *extack); 2175 2176#ifdef CONFIG_SYSFS 2177/* br_sysfs_if.c */ 2178extern const struct sysfs_ops brport_sysfs_ops; 2179int br_sysfs_addif(struct net_bridge_port *p); 2180int br_sysfs_renameif(struct net_bridge_port *p); 2181 2182/* br_sysfs_br.c */ 2183int br_sysfs_addbr(struct net_device *dev); 2184void br_sysfs_delbr(struct net_device *dev); 2185 2186#else 2187 2188static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2189static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2190static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2191static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2192#endif /* CONFIG_SYSFS */ 2193 2194/* br_switchdev.c */ 2195#ifdef CONFIG_NET_SWITCHDEV 2196int br_switchdev_port_offload(struct net_bridge_port *p, 2197 struct net_device *dev, const void *ctx, 2198 struct notifier_block *atomic_nb, 2199 struct notifier_block *blocking_nb, 2200 bool tx_fwd_offload, 2201 struct netlink_ext_ack *extack); 2202 2203void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2204 struct notifier_block *atomic_nb, 2205 struct notifier_block *blocking_nb); 2206 2207int br_switchdev_port_replay(struct net_bridge_port *p, 2208 struct net_device *dev, const void *ctx, 2209 struct notifier_block *atomic_nb, 2210 struct notifier_block *blocking_nb, 2211 struct netlink_ext_ack *extack); 2212 2213bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2214 2215void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2216 2217void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2218 struct sk_buff *skb); 2219void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2220 struct sk_buff *skb); 2221void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2222 struct sk_buff *skb); 2223bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2224 const struct sk_buff *skb); 2225int br_switchdev_set_port_flag(struct net_bridge_port *p, 2226 unsigned long flags, 2227 unsigned long mask, 2228 struct netlink_ext_ack *extack); 2229void br_switchdev_fdb_notify(struct net_bridge *br, 2230 const struct net_bridge_fdb_entry *fdb, int type); 2231void br_switchdev_mdb_notify(struct net_device *dev, 2232 struct net_bridge_mdb_entry *mp, 2233 struct net_bridge_port_group *pg, 2234 int type); 2235int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2236 bool changed, struct netlink_ext_ack *extack); 2237int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2238void br_switchdev_init(struct net_bridge *br); 2239 2240static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2241{ 2242 skb->offload_fwd_mark = 0; 2243} 2244#else 2245static inline int 2246br_switchdev_port_offload(struct net_bridge_port *p, 2247 struct net_device *dev, const void *ctx, 2248 struct notifier_block *atomic_nb, 2249 struct notifier_block *blocking_nb, 2250 bool tx_fwd_offload, 2251 struct netlink_ext_ack *extack) 2252{ 2253 return -EOPNOTSUPP; 2254} 2255 2256static inline void 2257br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2258 struct notifier_block *atomic_nb, 2259 struct notifier_block *blocking_nb) 2260{ 2261} 2262 2263static inline int 2264br_switchdev_port_replay(struct net_bridge_port *p, 2265 struct net_device *dev, const void *ctx, 2266 struct notifier_block *atomic_nb, 2267 struct notifier_block *blocking_nb, 2268 struct netlink_ext_ack *extack) 2269{ 2270 return -EOPNOTSUPP; 2271} 2272 2273static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2274{ 2275 return false; 2276} 2277 2278static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2279{ 2280} 2281 2282static inline void 2283nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2284 struct sk_buff *skb) 2285{ 2286} 2287 2288static inline void 2289nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2290 struct sk_buff *skb) 2291{ 2292} 2293 2294static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2295 struct sk_buff *skb) 2296{ 2297} 2298 2299static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2300 const struct sk_buff *skb) 2301{ 2302 return true; 2303} 2304 2305static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2306 unsigned long flags, 2307 unsigned long mask, 2308 struct netlink_ext_ack *extack) 2309{ 2310 return 0; 2311} 2312 2313static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2314 u16 flags, bool changed, 2315 struct netlink_ext_ack *extack) 2316{ 2317 return -EOPNOTSUPP; 2318} 2319 2320static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2321{ 2322 return -EOPNOTSUPP; 2323} 2324 2325static inline void 2326br_switchdev_fdb_notify(struct net_bridge *br, 2327 const struct net_bridge_fdb_entry *fdb, int type) 2328{ 2329} 2330 2331static inline void br_switchdev_mdb_notify(struct net_device *dev, 2332 struct net_bridge_mdb_entry *mp, 2333 struct net_bridge_port_group *pg, 2334 int type) 2335{ 2336} 2337 2338static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2339{ 2340} 2341 2342static inline void br_switchdev_init(struct net_bridge *br) 2343{ 2344} 2345 2346#endif /* CONFIG_NET_SWITCHDEV */ 2347 2348/* br_arp_nd_proxy.c */ 2349void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2350void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2351 u16 vid, struct net_bridge_port *p); 2352void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2353 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2354struct nd_msg *br_is_nd_neigh_msg(const struct sk_buff *skb, struct nd_msg *m); 2355bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid); 2356#endif
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