1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 32 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 33 34 #define BR_HWDOM_MAX BITS_PER_LONG 35 36 #define BR_VERSION "2.3" 37 38 /* Control of forwarding link local multicast */ 39 #define BR_GROUPFWD_DEFAULT 0 40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 41 enum { 42 BR_GROUPFWD_STP = BIT(0), 43 BR_GROUPFWD_MACPAUSE = BIT(1), 44 BR_GROUPFWD_LACP = BIT(2), 45 }; 46 47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 48 BR_GROUPFWD_LACP) 49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 50 #define BR_GROUPFWD_8021AD 0xB801u 51 52 /* Path to usermode spanning tree program */ 53 #define BR_STP_PROG "/sbin/bridge-stp" 54 55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 56 57 typedef struct bridge_id bridge_id; 58 typedef struct mac_addr mac_addr; 59 typedef __u16 port_id; 60 61 struct bridge_id { 62 unsigned char prio[2]; 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 struct mac_addr { 67 unsigned char addr[ETH_ALEN]; 68 }; 69 70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 71 /* our own querier */ 72 struct bridge_mcast_own_query { 73 struct timer_list timer; 74 u32 startup_sent; 75 }; 76 77 /* other querier */ 78 struct bridge_mcast_other_query { 79 struct timer_list timer; 80 unsigned long delay_time; 81 }; 82 83 /* selected querier */ 84 struct bridge_mcast_querier { 85 struct br_ip addr; 86 int port_ifidx; 87 seqcount_spinlock_t seq; 88 }; 89 90 /* IGMP/MLD statistics */ 91 struct bridge_mcast_stats { 92 struct br_mcast_stats mstats; 93 struct u64_stats_sync syncp; 94 }; 95 #endif 96 97 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 98 struct net_bridge_mcast_port { 99 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 100 struct net_bridge_port *port; 101 struct net_bridge_vlan *vlan; 102 103 struct bridge_mcast_own_query ip4_own_query; 104 struct timer_list ip4_mc_router_timer; 105 struct hlist_node ip4_rlist; 106 #if IS_ENABLED(CONFIG_IPV6) 107 struct bridge_mcast_own_query ip6_own_query; 108 struct timer_list ip6_mc_router_timer; 109 struct hlist_node ip6_rlist; 110 #endif /* IS_ENABLED(CONFIG_IPV6) */ 111 unsigned char multicast_router; 112 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 113 }; 114 115 /* net_bridge_mcast must be always defined due to forwarding stubs */ 116 struct net_bridge_mcast { 117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 118 struct net_bridge *br; 119 struct net_bridge_vlan *vlan; 120 121 u32 multicast_last_member_count; 122 u32 multicast_startup_query_count; 123 124 u8 multicast_querier; 125 u8 multicast_igmp_version; 126 u8 multicast_router; 127 #if IS_ENABLED(CONFIG_IPV6) 128 u8 multicast_mld_version; 129 #endif 130 unsigned long multicast_last_member_interval; 131 unsigned long multicast_membership_interval; 132 unsigned long multicast_querier_interval; 133 unsigned long multicast_query_interval; 134 unsigned long multicast_query_response_interval; 135 unsigned long multicast_startup_query_interval; 136 struct hlist_head ip4_mc_router_list; 137 struct timer_list ip4_mc_router_timer; 138 struct bridge_mcast_other_query ip4_other_query; 139 struct bridge_mcast_own_query ip4_own_query; 140 struct bridge_mcast_querier ip4_querier; 141 #if IS_ENABLED(CONFIG_IPV6) 142 struct hlist_head ip6_mc_router_list; 143 struct timer_list ip6_mc_router_timer; 144 struct bridge_mcast_other_query ip6_other_query; 145 struct bridge_mcast_own_query ip6_own_query; 146 struct bridge_mcast_querier ip6_querier; 147 #endif /* IS_ENABLED(CONFIG_IPV6) */ 148 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 149 }; 150 151 struct br_tunnel_info { 152 __be64 tunnel_id; 153 struct metadata_dst __rcu *tunnel_dst; 154 }; 155 156 /* private vlan flags */ 157 enum { 158 BR_VLFLAG_PER_PORT_STATS = BIT(0), 159 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 160 BR_VLFLAG_MCAST_ENABLED = BIT(2), 161 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 162 }; 163 164 /** 165 * struct net_bridge_vlan - per-vlan entry 166 * 167 * @vnode: rhashtable member 168 * @vid: VLAN id 169 * @flags: bridge vlan flags 170 * @priv_flags: private (in-kernel) bridge vlan flags 171 * @state: STP state (e.g. blocking, learning, forwarding) 172 * @stats: per-cpu VLAN statistics 173 * @br: if MASTER flag set, this points to a bridge struct 174 * @port: if MASTER flag unset, this points to a port struct 175 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 176 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 177 * for this VLAN entry 178 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 179 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 180 * context 181 * @msti: if MASTER flag set, this holds the VLANs MST instance 182 * @vlist: sorted list of VLAN entries 183 * @rcu: used for entry destruction 184 * 185 * This structure is shared between the global per-VLAN entries contained in 186 * the bridge rhashtable and the local per-port per-VLAN entries contained in 187 * the port's rhashtable. The union entries should be interpreted depending on 188 * the entry flags that are set. 189 */ 190 struct net_bridge_vlan { 191 struct rhash_head vnode; 192 struct rhash_head tnode; 193 u16 vid; 194 u16 flags; 195 u16 priv_flags; 196 u8 state; 197 struct pcpu_sw_netstats __percpu *stats; 198 union { 199 struct net_bridge *br; 200 struct net_bridge_port *port; 201 }; 202 union { 203 refcount_t refcnt; 204 struct net_bridge_vlan *brvlan; 205 }; 206 207 struct br_tunnel_info tinfo; 208 209 union { 210 struct net_bridge_mcast br_mcast_ctx; 211 struct net_bridge_mcast_port port_mcast_ctx; 212 }; 213 214 u16 msti; 215 216 struct list_head vlist; 217 218 struct rcu_head rcu; 219 }; 220 221 /** 222 * struct net_bridge_vlan_group 223 * 224 * @vlan_hash: VLAN entry rhashtable 225 * @vlan_list: sorted VLAN entry list 226 * @num_vlans: number of total VLAN entries 227 * @pvid: PVID VLAN id 228 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 229 * 230 * IMPORTANT: Be careful when checking if there're VLAN entries using list 231 * primitives because the bridge can have entries in its list which 232 * are just for global context but not for filtering, i.e. they have 233 * the master flag set but not the brentry flag. If you have to check 234 * if there're "real" entries in the bridge please test @num_vlans 235 */ 236 struct net_bridge_vlan_group { 237 struct rhashtable vlan_hash; 238 struct rhashtable tunnel_hash; 239 struct list_head vlan_list; 240 u16 num_vlans; 241 u16 pvid; 242 u8 pvid_state; 243 }; 244 245 /* bridge fdb flags */ 246 enum { 247 BR_FDB_LOCAL, 248 BR_FDB_STATIC, 249 BR_FDB_STICKY, 250 BR_FDB_ADDED_BY_USER, 251 BR_FDB_ADDED_BY_EXT_LEARN, 252 BR_FDB_OFFLOADED, 253 BR_FDB_NOTIFY, 254 BR_FDB_NOTIFY_INACTIVE 255 }; 256 257 struct net_bridge_fdb_key { 258 mac_addr addr; 259 u16 vlan_id; 260 }; 261 262 struct net_bridge_fdb_entry { 263 struct rhash_head rhnode; 264 struct net_bridge_port *dst; 265 266 struct net_bridge_fdb_key key; 267 struct hlist_node fdb_node; 268 unsigned long flags; 269 270 /* write-heavy members should not affect lookups */ 271 unsigned long updated ____cacheline_aligned_in_smp; 272 unsigned long used; 273 274 struct rcu_head rcu; 275 }; 276 277 struct net_bridge_fdb_flush_desc { 278 unsigned long flags; 279 unsigned long flags_mask; 280 int port_ifindex; 281 u16 vlan_id; 282 }; 283 284 #define MDB_PG_FLAGS_PERMANENT BIT(0) 285 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 286 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 287 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 288 #define MDB_PG_FLAGS_BLOCKED BIT(4) 289 290 #define PG_SRC_ENT_LIMIT 32 291 292 #define BR_SGRP_F_DELETE BIT(0) 293 #define BR_SGRP_F_SEND BIT(1) 294 #define BR_SGRP_F_INSTALLED BIT(2) 295 296 struct net_bridge_mcast_gc { 297 struct hlist_node gc_node; 298 void (*destroy)(struct net_bridge_mcast_gc *gc); 299 }; 300 301 struct net_bridge_group_src { 302 struct hlist_node node; 303 304 struct br_ip addr; 305 struct net_bridge_port_group *pg; 306 u8 flags; 307 u8 src_query_rexmit_cnt; 308 struct timer_list timer; 309 310 struct net_bridge *br; 311 struct net_bridge_mcast_gc mcast_gc; 312 struct rcu_head rcu; 313 }; 314 315 struct net_bridge_port_group_sg_key { 316 struct net_bridge_port *port; 317 struct br_ip addr; 318 }; 319 320 struct net_bridge_port_group { 321 struct net_bridge_port_group __rcu *next; 322 struct net_bridge_port_group_sg_key key; 323 unsigned char eth_addr[ETH_ALEN] __aligned(2); 324 unsigned char flags; 325 unsigned char filter_mode; 326 unsigned char grp_query_rexmit_cnt; 327 unsigned char rt_protocol; 328 329 struct hlist_head src_list; 330 unsigned int src_ents; 331 struct timer_list timer; 332 struct timer_list rexmit_timer; 333 struct hlist_node mglist; 334 struct rb_root eht_set_tree; 335 struct rb_root eht_host_tree; 336 337 struct rhash_head rhnode; 338 struct net_bridge_mcast_gc mcast_gc; 339 struct rcu_head rcu; 340 }; 341 342 struct net_bridge_mdb_entry { 343 struct rhash_head rhnode; 344 struct net_bridge *br; 345 struct net_bridge_port_group __rcu *ports; 346 struct br_ip addr; 347 bool host_joined; 348 349 struct timer_list timer; 350 struct hlist_node mdb_node; 351 352 struct net_bridge_mcast_gc mcast_gc; 353 struct rcu_head rcu; 354 }; 355 356 struct net_bridge_port { 357 struct net_bridge *br; 358 struct net_device *dev; 359 netdevice_tracker dev_tracker; 360 struct list_head list; 361 362 unsigned long flags; 363 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 364 struct net_bridge_vlan_group __rcu *vlgrp; 365 #endif 366 struct net_bridge_port __rcu *backup_port; 367 368 /* STP */ 369 u8 priority; 370 u8 state; 371 u16 port_no; 372 unsigned char topology_change_ack; 373 unsigned char config_pending; 374 port_id port_id; 375 port_id designated_port; 376 bridge_id designated_root; 377 bridge_id designated_bridge; 378 u32 path_cost; 379 u32 designated_cost; 380 unsigned long designated_age; 381 382 struct timer_list forward_delay_timer; 383 struct timer_list hold_timer; 384 struct timer_list message_age_timer; 385 struct kobject kobj; 386 struct rcu_head rcu; 387 388 struct net_bridge_mcast_port multicast_ctx; 389 390 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 391 struct bridge_mcast_stats __percpu *mcast_stats; 392 393 u32 multicast_eht_hosts_limit; 394 u32 multicast_eht_hosts_cnt; 395 struct hlist_head mglist; 396 #endif 397 398 #ifdef CONFIG_SYSFS 399 char sysfs_name[IFNAMSIZ]; 400 #endif 401 402 #ifdef CONFIG_NET_POLL_CONTROLLER 403 struct netpoll *np; 404 #endif 405 #ifdef CONFIG_NET_SWITCHDEV 406 /* Identifier used to group ports that share the same switchdev 407 * hardware domain. 408 */ 409 int hwdom; 410 int offload_count; 411 struct netdev_phys_item_id ppid; 412 #endif 413 u16 group_fwd_mask; 414 u16 backup_redirected_cnt; 415 416 struct bridge_stp_xstats stp_xstats; 417 }; 418 419 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 420 421 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 422 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 423 424 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 425 { 426 return rcu_dereference(dev->rx_handler_data); 427 } 428 429 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 430 { 431 return netif_is_bridge_port(dev) ? 432 rtnl_dereference(dev->rx_handler_data) : NULL; 433 } 434 435 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 436 { 437 return netif_is_bridge_port(dev) ? 438 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 439 } 440 441 enum net_bridge_opts { 442 BROPT_VLAN_ENABLED, 443 BROPT_VLAN_STATS_ENABLED, 444 BROPT_NF_CALL_IPTABLES, 445 BROPT_NF_CALL_IP6TABLES, 446 BROPT_NF_CALL_ARPTABLES, 447 BROPT_GROUP_ADDR_SET, 448 BROPT_MULTICAST_ENABLED, 449 BROPT_MULTICAST_QUERY_USE_IFADDR, 450 BROPT_MULTICAST_STATS_ENABLED, 451 BROPT_HAS_IPV6_ADDR, 452 BROPT_NEIGH_SUPPRESS_ENABLED, 453 BROPT_MTU_SET_BY_USER, 454 BROPT_VLAN_STATS_PER_PORT, 455 BROPT_NO_LL_LEARN, 456 BROPT_VLAN_BRIDGE_BINDING, 457 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 458 BROPT_MST_ENABLED, 459 }; 460 461 struct net_bridge { 462 spinlock_t lock; 463 spinlock_t hash_lock; 464 struct hlist_head frame_type_list; 465 struct net_device *dev; 466 unsigned long options; 467 /* These fields are accessed on each packet */ 468 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 469 __be16 vlan_proto; 470 u16 default_pvid; 471 struct net_bridge_vlan_group __rcu *vlgrp; 472 #endif 473 474 struct rhashtable fdb_hash_tbl; 475 struct list_head port_list; 476 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 477 union { 478 struct rtable fake_rtable; 479 struct rt6_info fake_rt6_info; 480 }; 481 #endif 482 u16 group_fwd_mask; 483 u16 group_fwd_mask_required; 484 485 /* STP */ 486 bridge_id designated_root; 487 bridge_id bridge_id; 488 unsigned char topology_change; 489 unsigned char topology_change_detected; 490 u16 root_port; 491 unsigned long max_age; 492 unsigned long hello_time; 493 unsigned long forward_delay; 494 unsigned long ageing_time; 495 unsigned long bridge_max_age; 496 unsigned long bridge_hello_time; 497 unsigned long bridge_forward_delay; 498 unsigned long bridge_ageing_time; 499 u32 root_path_cost; 500 501 u8 group_addr[ETH_ALEN]; 502 503 enum { 504 BR_NO_STP, /* no spanning tree */ 505 BR_KERNEL_STP, /* old STP in kernel */ 506 BR_USER_STP, /* new RSTP in userspace */ 507 } stp_enabled; 508 509 struct net_bridge_mcast multicast_ctx; 510 511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 512 struct bridge_mcast_stats __percpu *mcast_stats; 513 514 u32 hash_max; 515 516 spinlock_t multicast_lock; 517 518 struct rhashtable mdb_hash_tbl; 519 struct rhashtable sg_port_tbl; 520 521 struct hlist_head mcast_gc_list; 522 struct hlist_head mdb_list; 523 524 struct work_struct mcast_gc_work; 525 #endif 526 527 struct timer_list hello_timer; 528 struct timer_list tcn_timer; 529 struct timer_list topology_change_timer; 530 struct delayed_work gc_work; 531 struct kobject *ifobj; 532 u32 auto_cnt; 533 534 #ifdef CONFIG_NET_SWITCHDEV 535 /* Counter used to make sure that hardware domains get unique 536 * identifiers in case a bridge spans multiple switchdev instances. 537 */ 538 int last_hwdom; 539 /* Bit mask of hardware domain numbers in use */ 540 unsigned long busy_hwdoms; 541 #endif 542 struct hlist_head fdb_list; 543 544 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 545 struct hlist_head mrp_list; 546 #endif 547 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 548 struct hlist_head mep_list; 549 #endif 550 }; 551 552 struct br_input_skb_cb { 553 struct net_device *brdev; 554 555 u16 frag_max_size; 556 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 557 u8 igmp; 558 u8 mrouters_only:1; 559 #endif 560 u8 proxyarp_replied:1; 561 u8 src_port_isolated:1; 562 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 563 u8 vlan_filtered:1; 564 #endif 565 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 566 u8 br_netfilter_broute:1; 567 #endif 568 569 #ifdef CONFIG_NET_SWITCHDEV 570 /* Set if TX data plane offloading is used towards at least one 571 * hardware domain. 572 */ 573 u8 tx_fwd_offload:1; 574 /* The switchdev hardware domain from which this packet was received. 575 * If skb->offload_fwd_mark was set, then this packet was already 576 * forwarded by hardware to the other ports in the source hardware 577 * domain, otherwise it wasn't. 578 */ 579 int src_hwdom; 580 /* Bit mask of hardware domains towards this packet has already been 581 * transmitted using the TX data plane offload. 582 */ 583 unsigned long fwd_hwdoms; 584 #endif 585 }; 586 587 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 588 589 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 590 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 591 #else 592 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 593 #endif 594 595 #define br_printk(level, br, format, args...) \ 596 printk(level "%s: " format, (br)->dev->name, ##args) 597 598 #define br_err(__br, format, args...) \ 599 br_printk(KERN_ERR, __br, format, ##args) 600 #define br_warn(__br, format, args...) \ 601 br_printk(KERN_WARNING, __br, format, ##args) 602 #define br_notice(__br, format, args...) \ 603 br_printk(KERN_NOTICE, __br, format, ##args) 604 #define br_info(__br, format, args...) \ 605 br_printk(KERN_INFO, __br, format, ##args) 606 607 #define br_debug(br, format, args...) \ 608 pr_debug("%s: " format, (br)->dev->name, ##args) 609 610 /* called under bridge lock */ 611 static inline int br_is_root_bridge(const struct net_bridge *br) 612 { 613 return !memcmp(&br->bridge_id, &br->designated_root, 8); 614 } 615 616 /* check if a VLAN entry is global */ 617 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 618 { 619 return v->flags & BRIDGE_VLAN_INFO_MASTER; 620 } 621 622 /* check if a VLAN entry is used by the bridge */ 623 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 624 { 625 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 626 } 627 628 /* check if we should use the vlan entry, returns false if it's only context */ 629 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 630 { 631 if (br_vlan_is_master(v)) { 632 if (br_vlan_is_brentry(v)) 633 return true; 634 else 635 return false; 636 } 637 638 return true; 639 } 640 641 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 642 { 643 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 644 } 645 646 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 647 { 648 bool ret = vid > 0 && vid < VLAN_VID_MASK; 649 650 if (!ret) 651 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 652 653 return ret; 654 } 655 656 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 657 const struct bridge_vlan_info *last, 658 struct netlink_ext_ack *extack) 659 { 660 /* pvid flag is not allowed in ranges */ 661 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 662 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 663 return false; 664 } 665 666 /* when cur is the range end, check if: 667 * - it has range start flag 668 * - range ids are invalid (end is equal to or before start) 669 */ 670 if (last) { 671 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 672 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 673 return false; 674 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 675 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 676 return false; 677 } else if (cur->vid <= last->vid) { 678 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 679 return false; 680 } 681 } 682 683 /* check for required range flags */ 684 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 685 BRIDGE_VLAN_INFO_RANGE_END))) { 686 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 687 return false; 688 } 689 690 return true; 691 } 692 693 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 694 { 695 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 696 697 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 698 if (!br_vlan_is_master(v)) 699 mcast_router = v->port_mcast_ctx.multicast_router; 700 else 701 mcast_router = v->br_mcast_ctx.multicast_router; 702 #endif 703 704 return mcast_router; 705 } 706 707 static inline int br_afspec_cmd_to_rtm(int cmd) 708 { 709 switch (cmd) { 710 case RTM_SETLINK: 711 return RTM_NEWVLAN; 712 case RTM_DELLINK: 713 return RTM_DELVLAN; 714 } 715 716 return 0; 717 } 718 719 static inline int br_opt_get(const struct net_bridge *br, 720 enum net_bridge_opts opt) 721 { 722 return test_bit(opt, &br->options); 723 } 724 725 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 726 struct netlink_ext_ack *extack); 727 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 728 int br_boolopt_multi_toggle(struct net_bridge *br, 729 struct br_boolopt_multi *bm, 730 struct netlink_ext_ack *extack); 731 void br_boolopt_multi_get(const struct net_bridge *br, 732 struct br_boolopt_multi *bm); 733 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 734 735 /* br_device.c */ 736 void br_dev_setup(struct net_device *dev); 737 void br_dev_delete(struct net_device *dev, struct list_head *list); 738 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 739 #ifdef CONFIG_NET_POLL_CONTROLLER 740 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 741 struct sk_buff *skb) 742 { 743 netpoll_send_skb(p->np, skb); 744 } 745 746 int br_netpoll_enable(struct net_bridge_port *p); 747 void br_netpoll_disable(struct net_bridge_port *p); 748 #else 749 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 750 struct sk_buff *skb) 751 { 752 } 753 754 static inline int br_netpoll_enable(struct net_bridge_port *p) 755 { 756 return 0; 757 } 758 759 static inline void br_netpoll_disable(struct net_bridge_port *p) 760 { 761 } 762 #endif 763 764 /* br_fdb.c */ 765 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 766 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 767 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 768 NTF_STICKY | NTF_OFFLOADED) 769 770 int br_fdb_init(void); 771 void br_fdb_fini(void); 772 int br_fdb_hash_init(struct net_bridge *br); 773 void br_fdb_hash_fini(struct net_bridge *br); 774 void br_fdb_flush(struct net_bridge *br, 775 const struct net_bridge_fdb_flush_desc *desc); 776 void br_fdb_find_delete_local(struct net_bridge *br, 777 const struct net_bridge_port *p, 778 const unsigned char *addr, u16 vid); 779 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 780 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 781 void br_fdb_cleanup(struct work_struct *work); 782 void br_fdb_delete_by_port(struct net_bridge *br, 783 const struct net_bridge_port *p, u16 vid, int do_all); 784 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 785 const unsigned char *addr, 786 __u16 vid); 787 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 788 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 789 unsigned long off); 790 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 791 const unsigned char *addr, u16 vid); 792 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 793 const unsigned char *addr, u16 vid, unsigned long flags); 794 795 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 796 struct net_device *dev, const unsigned char *addr, u16 vid); 797 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], 798 struct net_device *dev, u16 vid, 799 struct netlink_ext_ack *extack); 800 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 801 const unsigned char *addr, u16 vid, u16 nlh_flags, 802 struct netlink_ext_ack *extack); 803 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 804 struct net_device *dev, struct net_device *fdev, int *idx); 805 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 806 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 807 struct netlink_ext_ack *extack); 808 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 809 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 810 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 811 const unsigned char *addr, u16 vid, 812 bool swdev_notify); 813 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 814 const unsigned char *addr, u16 vid, 815 bool swdev_notify); 816 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 817 const unsigned char *addr, u16 vid, bool offloaded); 818 819 /* br_forward.c */ 820 enum br_pkt_type { 821 BR_PKT_UNICAST, 822 BR_PKT_MULTICAST, 823 BR_PKT_BROADCAST 824 }; 825 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 826 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 827 bool local_rcv, bool local_orig); 828 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 829 void br_flood(struct net_bridge *br, struct sk_buff *skb, 830 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 831 832 /* return true if both source port and dest port are isolated */ 833 static inline bool br_skb_isolated(const struct net_bridge_port *to, 834 const struct sk_buff *skb) 835 { 836 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 837 (to->flags & BR_ISOLATED); 838 } 839 840 /* br_if.c */ 841 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 842 int br_add_bridge(struct net *net, const char *name); 843 int br_del_bridge(struct net *net, const char *name); 844 int br_add_if(struct net_bridge *br, struct net_device *dev, 845 struct netlink_ext_ack *extack); 846 int br_del_if(struct net_bridge *br, struct net_device *dev); 847 void br_mtu_auto_adjust(struct net_bridge *br); 848 netdev_features_t br_features_recompute(struct net_bridge *br, 849 netdev_features_t features); 850 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 851 void br_manage_promisc(struct net_bridge *br); 852 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 853 854 /* br_input.c */ 855 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 856 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 857 858 struct br_frame_type { 859 __be16 type; 860 int (*frame_handler)(struct net_bridge_port *port, 861 struct sk_buff *skb); 862 struct hlist_node list; 863 }; 864 865 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 866 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 867 868 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 869 { 870 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 871 } 872 873 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 874 { 875 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 876 } 877 878 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 879 { 880 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 881 } 882 883 static inline struct net_bridge_port * 884 br_port_get_check_rtnl(const struct net_device *dev) 885 { 886 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 887 } 888 889 /* br_ioctl.c */ 890 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 891 void __user *data, int cmd); 892 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 893 struct ifreq *ifr, void __user *uarg); 894 895 /* br_multicast.c */ 896 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 897 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 898 struct net_bridge_mcast_port **pmctx, 899 struct net_bridge_vlan *vlan, 900 struct sk_buff *skb, u16 vid); 901 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 902 struct sk_buff *skb, u16 vid); 903 int br_multicast_add_port(struct net_bridge_port *port); 904 void br_multicast_del_port(struct net_bridge_port *port); 905 void br_multicast_enable_port(struct net_bridge_port *port); 906 void br_multicast_disable_port(struct net_bridge_port *port); 907 void br_multicast_init(struct net_bridge *br); 908 void br_multicast_join_snoopers(struct net_bridge *br); 909 void br_multicast_leave_snoopers(struct net_bridge *br); 910 void br_multicast_open(struct net_bridge *br); 911 void br_multicast_stop(struct net_bridge *br); 912 void br_multicast_dev_del(struct net_bridge *br); 913 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 914 struct net_bridge_mcast *brmctx, 915 bool local_rcv, bool local_orig); 916 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 917 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 918 unsigned long val); 919 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 920 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 921 struct netlink_ext_ack *extack); 922 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 923 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 924 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 925 unsigned long val); 926 #if IS_ENABLED(CONFIG_IPV6) 927 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 928 unsigned long val); 929 #endif 930 struct net_bridge_mdb_entry * 931 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 932 struct net_bridge_mdb_entry * 933 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 934 struct net_bridge_port_group * 935 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 936 struct net_bridge_port_group __rcu *next, 937 unsigned char flags, const unsigned char *src, 938 u8 filter_mode, u8 rt_protocol); 939 int br_mdb_hash_init(struct net_bridge *br); 940 void br_mdb_hash_fini(struct net_bridge *br); 941 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 942 struct net_bridge_port_group *pg, int type); 943 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 944 int type); 945 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 946 struct net_bridge_port_group *pg, 947 struct net_bridge_port_group __rcu **pp); 948 void br_multicast_count(struct net_bridge *br, 949 const struct net_bridge_port *p, 950 const struct sk_buff *skb, u8 type, u8 dir); 951 int br_multicast_init_stats(struct net_bridge *br); 952 void br_multicast_uninit_stats(struct net_bridge *br); 953 void br_multicast_get_stats(const struct net_bridge *br, 954 const struct net_bridge_port *p, 955 struct br_mcast_stats *dest); 956 void br_mdb_init(void); 957 void br_mdb_uninit(void); 958 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 959 struct net_bridge_mdb_entry *mp, bool notify); 960 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 961 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 962 u8 filter_mode); 963 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 964 struct net_bridge_port_group *sg); 965 struct net_bridge_group_src * 966 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 967 void br_multicast_del_group_src(struct net_bridge_group_src *src, 968 bool fastleave); 969 void br_multicast_ctx_init(struct net_bridge *br, 970 struct net_bridge_vlan *vlan, 971 struct net_bridge_mcast *brmctx); 972 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 973 void br_multicast_port_ctx_init(struct net_bridge_port *port, 974 struct net_bridge_vlan *vlan, 975 struct net_bridge_mcast_port *pmctx); 976 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 977 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 978 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 979 struct netlink_ext_ack *extack); 980 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 981 982 int br_rports_fill_info(struct sk_buff *skb, 983 const struct net_bridge_mcast *brmctx); 984 int br_multicast_dump_querier_state(struct sk_buff *skb, 985 const struct net_bridge_mcast *brmctx, 986 int nest_attr); 987 size_t br_multicast_querier_state_size(void); 988 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 989 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 990 unsigned long val); 991 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 992 unsigned long val); 993 994 static inline bool br_group_is_l2(const struct br_ip *group) 995 { 996 return group->proto == 0; 997 } 998 999 #define mlock_dereference(X, br) \ 1000 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1001 1002 static inline struct hlist_node * 1003 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1004 struct sk_buff *skb) 1005 { 1006 #if IS_ENABLED(CONFIG_IPV6) 1007 if (skb->protocol == htons(ETH_P_IPV6)) 1008 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1009 #endif 1010 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1011 } 1012 1013 static inline struct net_bridge_port * 1014 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1015 { 1016 struct net_bridge_mcast_port *mctx; 1017 1018 #if IS_ENABLED(CONFIG_IPV6) 1019 if (skb->protocol == htons(ETH_P_IPV6)) 1020 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1021 ip6_rlist); 1022 else 1023 #endif 1024 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1025 ip4_rlist); 1026 1027 if (mctx) 1028 return mctx->port; 1029 else 1030 return NULL; 1031 } 1032 1033 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1034 { 1035 return timer_pending(&brmctx->ip4_mc_router_timer); 1036 } 1037 1038 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1039 { 1040 #if IS_ENABLED(CONFIG_IPV6) 1041 return timer_pending(&brmctx->ip6_mc_router_timer); 1042 #else 1043 return false; 1044 #endif 1045 } 1046 1047 static inline bool 1048 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1049 { 1050 switch (brmctx->multicast_router) { 1051 case MDB_RTR_TYPE_PERM: 1052 return true; 1053 case MDB_RTR_TYPE_TEMP_QUERY: 1054 if (skb) { 1055 if (skb->protocol == htons(ETH_P_IP)) 1056 return br_ip4_multicast_is_router(brmctx); 1057 else if (skb->protocol == htons(ETH_P_IPV6)) 1058 return br_ip6_multicast_is_router(brmctx); 1059 } else { 1060 return br_ip4_multicast_is_router(brmctx) || 1061 br_ip6_multicast_is_router(brmctx); 1062 } 1063 fallthrough; 1064 default: 1065 return false; 1066 } 1067 } 1068 1069 static inline bool 1070 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1071 struct bridge_mcast_other_query *querier, 1072 const bool is_ipv6) 1073 { 1074 bool own_querier_enabled; 1075 1076 if (brmctx->multicast_querier) { 1077 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1078 own_querier_enabled = false; 1079 else 1080 own_querier_enabled = true; 1081 } else { 1082 own_querier_enabled = false; 1083 } 1084 1085 return time_is_before_jiffies(querier->delay_time) && 1086 (own_querier_enabled || timer_pending(&querier->timer)); 1087 } 1088 1089 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1090 struct ethhdr *eth, 1091 const struct net_bridge_mdb_entry *mdb) 1092 { 1093 switch (eth->h_proto) { 1094 case (htons(ETH_P_IP)): 1095 return __br_multicast_querier_exists(brmctx, 1096 &brmctx->ip4_other_query, false); 1097 #if IS_ENABLED(CONFIG_IPV6) 1098 case (htons(ETH_P_IPV6)): 1099 return __br_multicast_querier_exists(brmctx, 1100 &brmctx->ip6_other_query, true); 1101 #endif 1102 default: 1103 return !!mdb && br_group_is_l2(&mdb->addr); 1104 } 1105 } 1106 1107 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1108 { 1109 switch (ip->proto) { 1110 case htons(ETH_P_IP): 1111 return ipv4_is_zeronet(ip->src.ip4); 1112 #if IS_ENABLED(CONFIG_IPV6) 1113 case htons(ETH_P_IPV6): 1114 return ipv6_addr_any(&ip->src.ip6); 1115 #endif 1116 default: 1117 return false; 1118 } 1119 } 1120 1121 static inline bool 1122 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1123 __be16 proto) 1124 { 1125 switch (proto) { 1126 case htons(ETH_P_IP): 1127 return !!(brmctx->multicast_igmp_version == 3); 1128 #if IS_ENABLED(CONFIG_IPV6) 1129 case htons(ETH_P_IPV6): 1130 return !!(brmctx->multicast_mld_version == 2); 1131 #endif 1132 default: 1133 return false; 1134 } 1135 } 1136 1137 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1138 { 1139 return BR_INPUT_SKB_CB(skb)->igmp; 1140 } 1141 1142 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1143 { 1144 return brmctx->multicast_last_member_interval * 1145 brmctx->multicast_last_member_count; 1146 } 1147 1148 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1149 { 1150 return brmctx->multicast_membership_interval; 1151 } 1152 1153 static inline bool 1154 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1155 { 1156 return !!brmctx->vlan; 1157 } 1158 1159 static inline bool 1160 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1161 { 1162 return !!pmctx->vlan; 1163 } 1164 1165 static inline struct net_bridge_mcast * 1166 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1167 { 1168 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1169 return &pmctx->port->br->multicast_ctx; 1170 else 1171 return &pmctx->vlan->brvlan->br_mcast_ctx; 1172 } 1173 1174 static inline bool 1175 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1176 { 1177 return br_multicast_ctx_is_vlan(brmctx) && 1178 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1179 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1180 } 1181 1182 static inline bool 1183 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1184 { 1185 return br_multicast_ctx_is_vlan(brmctx) && 1186 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1187 } 1188 1189 static inline bool 1190 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1191 { 1192 return br_multicast_port_ctx_is_vlan(pmctx) && 1193 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1194 } 1195 1196 static inline bool 1197 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1198 { 1199 return pmctx->port->state == BR_STATE_DISABLED || 1200 (br_multicast_port_ctx_is_vlan(pmctx) && 1201 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1202 pmctx->vlan->state == BR_STATE_DISABLED)); 1203 } 1204 1205 static inline bool 1206 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1207 { 1208 return br_multicast_port_ctx_state_disabled(pmctx) || 1209 pmctx->port->state == BR_STATE_BLOCKING || 1210 (br_multicast_port_ctx_is_vlan(pmctx) && 1211 pmctx->vlan->state == BR_STATE_BLOCKING); 1212 } 1213 1214 static inline bool 1215 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1216 { 1217 #if IS_ENABLED(CONFIG_IPV6) 1218 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1219 !hlist_empty(&brmctx->ip6_mc_router_list); 1220 #else 1221 return !hlist_empty(&brmctx->ip4_mc_router_list); 1222 #endif 1223 } 1224 1225 static inline bool 1226 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1227 const struct net_bridge_mcast *brmctx2) 1228 { 1229 return brmctx1->multicast_igmp_version == 1230 brmctx2->multicast_igmp_version && 1231 brmctx1->multicast_last_member_count == 1232 brmctx2->multicast_last_member_count && 1233 brmctx1->multicast_startup_query_count == 1234 brmctx2->multicast_startup_query_count && 1235 brmctx1->multicast_last_member_interval == 1236 brmctx2->multicast_last_member_interval && 1237 brmctx1->multicast_membership_interval == 1238 brmctx2->multicast_membership_interval && 1239 brmctx1->multicast_querier_interval == 1240 brmctx2->multicast_querier_interval && 1241 brmctx1->multicast_query_interval == 1242 brmctx2->multicast_query_interval && 1243 brmctx1->multicast_query_response_interval == 1244 brmctx2->multicast_query_response_interval && 1245 brmctx1->multicast_startup_query_interval == 1246 brmctx2->multicast_startup_query_interval && 1247 brmctx1->multicast_querier == brmctx2->multicast_querier && 1248 brmctx1->multicast_router == brmctx2->multicast_router && 1249 !br_rports_have_mc_router(brmctx1) && 1250 !br_rports_have_mc_router(brmctx2) && 1251 #if IS_ENABLED(CONFIG_IPV6) 1252 brmctx1->multicast_mld_version == 1253 brmctx2->multicast_mld_version && 1254 #endif 1255 true; 1256 } 1257 1258 static inline bool 1259 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1260 { 1261 bool vlan_snooping_enabled; 1262 1263 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1264 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1265 1266 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1267 } 1268 #else 1269 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1270 struct net_bridge_mcast_port **pmctx, 1271 struct net_bridge_vlan *vlan, 1272 struct sk_buff *skb, 1273 u16 vid) 1274 { 1275 return 0; 1276 } 1277 1278 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1279 struct sk_buff *skb, u16 vid) 1280 { 1281 return NULL; 1282 } 1283 1284 static inline int br_multicast_add_port(struct net_bridge_port *port) 1285 { 1286 return 0; 1287 } 1288 1289 static inline void br_multicast_del_port(struct net_bridge_port *port) 1290 { 1291 } 1292 1293 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1294 { 1295 } 1296 1297 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1298 { 1299 } 1300 1301 static inline void br_multicast_init(struct net_bridge *br) 1302 { 1303 } 1304 1305 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1306 { 1307 } 1308 1309 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1310 { 1311 } 1312 1313 static inline void br_multicast_open(struct net_bridge *br) 1314 { 1315 } 1316 1317 static inline void br_multicast_stop(struct net_bridge *br) 1318 { 1319 } 1320 1321 static inline void br_multicast_dev_del(struct net_bridge *br) 1322 { 1323 } 1324 1325 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1326 struct sk_buff *skb, 1327 struct net_bridge_mcast *brmctx, 1328 bool local_rcv, bool local_orig) 1329 { 1330 } 1331 1332 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1333 struct sk_buff *skb) 1334 { 1335 return false; 1336 } 1337 1338 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1339 struct ethhdr *eth, 1340 const struct net_bridge_mdb_entry *mdb) 1341 { 1342 return false; 1343 } 1344 1345 static inline void br_mdb_init(void) 1346 { 1347 } 1348 1349 static inline void br_mdb_uninit(void) 1350 { 1351 } 1352 1353 static inline int br_mdb_hash_init(struct net_bridge *br) 1354 { 1355 return 0; 1356 } 1357 1358 static inline void br_mdb_hash_fini(struct net_bridge *br) 1359 { 1360 } 1361 1362 static inline void br_multicast_count(struct net_bridge *br, 1363 const struct net_bridge_port *p, 1364 const struct sk_buff *skb, 1365 u8 type, u8 dir) 1366 { 1367 } 1368 1369 static inline int br_multicast_init_stats(struct net_bridge *br) 1370 { 1371 return 0; 1372 } 1373 1374 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1375 { 1376 } 1377 1378 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1379 { 1380 return 0; 1381 } 1382 1383 static inline void br_multicast_ctx_init(struct net_bridge *br, 1384 struct net_bridge_vlan *vlan, 1385 struct net_bridge_mcast *brmctx) 1386 { 1387 } 1388 1389 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1390 { 1391 } 1392 1393 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1394 struct net_bridge_vlan *vlan, 1395 struct net_bridge_mcast_port *pmctx) 1396 { 1397 } 1398 1399 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1400 { 1401 } 1402 1403 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1404 bool on) 1405 { 1406 } 1407 1408 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1409 bool on, 1410 struct netlink_ext_ack *extack) 1411 { 1412 return -EOPNOTSUPP; 1413 } 1414 1415 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1416 bool on) 1417 { 1418 return false; 1419 } 1420 1421 static inline bool 1422 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1423 const struct net_bridge_mcast *brmctx2) 1424 { 1425 return true; 1426 } 1427 #endif 1428 1429 /* br_vlan.c */ 1430 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1431 bool br_allowed_ingress(const struct net_bridge *br, 1432 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1433 u16 *vid, u8 *state, 1434 struct net_bridge_vlan **vlan); 1435 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1436 const struct sk_buff *skb); 1437 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1438 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1439 const struct net_bridge_port *port, 1440 struct net_bridge_vlan_group *vg, 1441 struct sk_buff *skb); 1442 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1443 bool *changed, struct netlink_ext_ack *extack); 1444 int br_vlan_delete(struct net_bridge *br, u16 vid); 1445 void br_vlan_flush(struct net_bridge *br); 1446 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1447 void br_recalculate_fwd_mask(struct net_bridge *br); 1448 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1449 struct netlink_ext_ack *extack); 1450 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1451 struct netlink_ext_ack *extack); 1452 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1453 struct netlink_ext_ack *extack); 1454 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1455 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1456 int br_vlan_init(struct net_bridge *br); 1457 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1458 struct netlink_ext_ack *extack); 1459 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1460 struct netlink_ext_ack *extack); 1461 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1462 bool *changed, struct netlink_ext_ack *extack); 1463 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1464 void nbp_vlan_flush(struct net_bridge_port *port); 1465 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1466 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1467 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1468 struct pcpu_sw_netstats *stats); 1469 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1470 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1471 void *ptr); 1472 void br_vlan_rtnl_init(void); 1473 void br_vlan_rtnl_uninit(void); 1474 void br_vlan_notify(const struct net_bridge *br, 1475 const struct net_bridge_port *p, 1476 u16 vid, u16 vid_range, 1477 int cmd); 1478 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1479 const struct net_bridge_vlan *range_end); 1480 1481 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1482 struct net_device_path_ctx *ctx, 1483 struct net_device_path *path); 1484 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1485 struct net_bridge_port *dst, 1486 struct net_device_path *path); 1487 1488 static inline struct net_bridge_vlan_group *br_vlan_group( 1489 const struct net_bridge *br) 1490 { 1491 return rtnl_dereference(br->vlgrp); 1492 } 1493 1494 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1495 const struct net_bridge_port *p) 1496 { 1497 return rtnl_dereference(p->vlgrp); 1498 } 1499 1500 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1501 const struct net_bridge *br) 1502 { 1503 return rcu_dereference(br->vlgrp); 1504 } 1505 1506 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1507 const struct net_bridge_port *p) 1508 { 1509 return rcu_dereference(p->vlgrp); 1510 } 1511 1512 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1513 * skb, the vlan tag will always be present if the frame was tagged. 1514 */ 1515 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1516 { 1517 int err = 0; 1518 1519 if (skb_vlan_tag_present(skb)) { 1520 *vid = skb_vlan_tag_get_id(skb); 1521 } else { 1522 *vid = 0; 1523 err = -EINVAL; 1524 } 1525 1526 return err; 1527 } 1528 1529 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1530 { 1531 if (!vg) 1532 return 0; 1533 1534 smp_rmb(); 1535 return vg->pvid; 1536 } 1537 1538 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1539 { 1540 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1541 } 1542 #else 1543 static inline bool br_allowed_ingress(const struct net_bridge *br, 1544 struct net_bridge_vlan_group *vg, 1545 struct sk_buff *skb, 1546 u16 *vid, u8 *state, 1547 struct net_bridge_vlan **vlan) 1548 1549 { 1550 *vlan = NULL; 1551 return true; 1552 } 1553 1554 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1555 const struct sk_buff *skb) 1556 { 1557 return true; 1558 } 1559 1560 static inline bool br_should_learn(struct net_bridge_port *p, 1561 struct sk_buff *skb, u16 *vid) 1562 { 1563 return true; 1564 } 1565 1566 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1567 const struct net_bridge_port *port, 1568 struct net_bridge_vlan_group *vg, 1569 struct sk_buff *skb) 1570 { 1571 return skb; 1572 } 1573 1574 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1575 bool *changed, struct netlink_ext_ack *extack) 1576 { 1577 *changed = false; 1578 return -EOPNOTSUPP; 1579 } 1580 1581 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1582 { 1583 return -EOPNOTSUPP; 1584 } 1585 1586 static inline void br_vlan_flush(struct net_bridge *br) 1587 { 1588 } 1589 1590 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1591 { 1592 } 1593 1594 static inline int br_vlan_init(struct net_bridge *br) 1595 { 1596 return 0; 1597 } 1598 1599 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1600 bool *changed, struct netlink_ext_ack *extack) 1601 { 1602 *changed = false; 1603 return -EOPNOTSUPP; 1604 } 1605 1606 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1607 { 1608 return -EOPNOTSUPP; 1609 } 1610 1611 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1612 { 1613 } 1614 1615 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1616 u16 vid) 1617 { 1618 return NULL; 1619 } 1620 1621 static inline int nbp_vlan_init(struct net_bridge_port *port, 1622 struct netlink_ext_ack *extack) 1623 { 1624 return 0; 1625 } 1626 1627 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1628 { 1629 return 0; 1630 } 1631 1632 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1633 { 1634 return 0; 1635 } 1636 1637 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1638 unsigned long val, 1639 struct netlink_ext_ack *extack) 1640 { 1641 return -EOPNOTSUPP; 1642 } 1643 1644 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1645 u32 filter_mask) 1646 { 1647 return 0; 1648 } 1649 1650 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1651 struct net_device_path_ctx *ctx, 1652 struct net_device_path *path) 1653 { 1654 } 1655 1656 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1657 struct net_bridge_port *dst, 1658 struct net_device_path *path) 1659 { 1660 return 0; 1661 } 1662 1663 static inline struct net_bridge_vlan_group *br_vlan_group( 1664 const struct net_bridge *br) 1665 { 1666 return NULL; 1667 } 1668 1669 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1670 const struct net_bridge_port *p) 1671 { 1672 return NULL; 1673 } 1674 1675 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1676 const struct net_bridge *br) 1677 { 1678 return NULL; 1679 } 1680 1681 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1682 const struct net_bridge_port *p) 1683 { 1684 return NULL; 1685 } 1686 1687 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1688 struct pcpu_sw_netstats *stats) 1689 { 1690 } 1691 1692 static inline void br_vlan_port_event(struct net_bridge_port *p, 1693 unsigned long event) 1694 { 1695 } 1696 1697 static inline int br_vlan_bridge_event(struct net_device *dev, 1698 unsigned long event, void *ptr) 1699 { 1700 return 0; 1701 } 1702 1703 static inline void br_vlan_rtnl_init(void) 1704 { 1705 } 1706 1707 static inline void br_vlan_rtnl_uninit(void) 1708 { 1709 } 1710 1711 static inline void br_vlan_notify(const struct net_bridge *br, 1712 const struct net_bridge_port *p, 1713 u16 vid, u16 vid_range, 1714 int cmd) 1715 { 1716 } 1717 1718 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1719 const struct net_bridge_vlan *range_end) 1720 { 1721 return true; 1722 } 1723 1724 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1725 { 1726 return 0; 1727 } 1728 1729 #endif 1730 1731 /* br_vlan_options.c */ 1732 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1733 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1734 const struct net_bridge_vlan *range_end); 1735 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1736 size_t br_vlan_opts_nl_size(void); 1737 int br_vlan_process_options(const struct net_bridge *br, 1738 const struct net_bridge_port *p, 1739 struct net_bridge_vlan *range_start, 1740 struct net_bridge_vlan *range_end, 1741 struct nlattr **tb, 1742 struct netlink_ext_ack *extack); 1743 int br_vlan_rtm_process_global_options(struct net_device *dev, 1744 const struct nlattr *attr, 1745 int cmd, 1746 struct netlink_ext_ack *extack); 1747 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1748 const struct net_bridge_vlan *r_end); 1749 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1750 const struct net_bridge_vlan *v_opts); 1751 1752 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1753 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1754 { 1755 return READ_ONCE(v->state); 1756 } 1757 1758 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1759 { 1760 WRITE_ONCE(v->state, state); 1761 } 1762 1763 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1764 { 1765 return READ_ONCE(vg->pvid_state); 1766 } 1767 1768 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1769 u8 state) 1770 { 1771 WRITE_ONCE(vg->pvid_state, state); 1772 } 1773 1774 /* learn_allow is true at ingress and false at egress */ 1775 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1776 { 1777 switch (state) { 1778 case BR_STATE_LEARNING: 1779 return learn_allow; 1780 case BR_STATE_FORWARDING: 1781 return true; 1782 default: 1783 return false; 1784 } 1785 } 1786 #endif 1787 1788 /* br_mst.c */ 1789 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1790 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1791 static inline bool br_mst_is_enabled(struct net_bridge *br) 1792 { 1793 return static_branch_unlikely(&br_mst_used) && 1794 br_opt_get(br, BROPT_MST_ENABLED); 1795 } 1796 1797 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1798 struct netlink_ext_ack *extack); 1799 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1800 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1801 int br_mst_set_enabled(struct net_bridge *br, bool on, 1802 struct netlink_ext_ack *extack); 1803 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1804 int br_mst_fill_info(struct sk_buff *skb, 1805 const struct net_bridge_vlan_group *vg); 1806 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1807 struct netlink_ext_ack *extack); 1808 #else 1809 static inline bool br_mst_is_enabled(struct net_bridge *br) 1810 { 1811 return false; 1812 } 1813 1814 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1815 u8 state, struct netlink_ext_ack *extack) 1816 { 1817 return -EOPNOTSUPP; 1818 } 1819 1820 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1821 struct netlink_ext_ack *extack) 1822 { 1823 return -EOPNOTSUPP; 1824 } 1825 1826 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1827 { 1828 return 0; 1829 } 1830 1831 static inline int br_mst_fill_info(struct sk_buff *skb, 1832 const struct net_bridge_vlan_group *vg) 1833 { 1834 return -EOPNOTSUPP; 1835 } 1836 1837 static inline int br_mst_process(struct net_bridge_port *p, 1838 const struct nlattr *mst_attr, 1839 struct netlink_ext_ack *extack) 1840 { 1841 return -EOPNOTSUPP; 1842 } 1843 #endif 1844 1845 struct nf_br_ops { 1846 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1847 }; 1848 extern const struct nf_br_ops __rcu *nf_br_ops; 1849 1850 /* br_netfilter.c */ 1851 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1852 int br_nf_core_init(void); 1853 void br_nf_core_fini(void); 1854 void br_netfilter_rtable_init(struct net_bridge *); 1855 #else 1856 static inline int br_nf_core_init(void) { return 0; } 1857 static inline void br_nf_core_fini(void) {} 1858 #define br_netfilter_rtable_init(x) 1859 #endif 1860 1861 /* br_stp.c */ 1862 void br_set_state(struct net_bridge_port *p, unsigned int state); 1863 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1864 void br_init_port(struct net_bridge_port *p); 1865 void br_become_designated_port(struct net_bridge_port *p); 1866 1867 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1868 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1869 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1870 int br_set_max_age(struct net_bridge *br, unsigned long x); 1871 int __set_ageing_time(struct net_device *dev, unsigned long t); 1872 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1873 1874 1875 /* br_stp_if.c */ 1876 void br_stp_enable_bridge(struct net_bridge *br); 1877 void br_stp_disable_bridge(struct net_bridge *br); 1878 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1879 struct netlink_ext_ack *extack); 1880 void br_stp_enable_port(struct net_bridge_port *p); 1881 void br_stp_disable_port(struct net_bridge_port *p); 1882 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1883 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1884 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1885 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1886 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1887 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1888 1889 /* br_stp_bpdu.c */ 1890 struct stp_proto; 1891 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1892 struct net_device *dev); 1893 1894 /* br_stp_timer.c */ 1895 void br_stp_timer_init(struct net_bridge *br); 1896 void br_stp_port_timer_init(struct net_bridge_port *p); 1897 unsigned long br_timer_value(const struct timer_list *timer); 1898 1899 /* br.c */ 1900 #if IS_ENABLED(CONFIG_ATM_LANE) 1901 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1902 #endif 1903 1904 /* br_mrp.c */ 1905 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1906 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1907 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1908 bool br_mrp_enabled(struct net_bridge *br); 1909 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1910 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1911 #else 1912 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1913 struct nlattr *attr, int cmd, 1914 struct netlink_ext_ack *extack) 1915 { 1916 return -EOPNOTSUPP; 1917 } 1918 1919 static inline bool br_mrp_enabled(struct net_bridge *br) 1920 { 1921 return false; 1922 } 1923 1924 static inline void br_mrp_port_del(struct net_bridge *br, 1925 struct net_bridge_port *p) 1926 { 1927 } 1928 1929 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1930 { 1931 return 0; 1932 } 1933 1934 #endif 1935 1936 /* br_cfm.c */ 1937 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1938 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1939 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1940 bool br_cfm_created(struct net_bridge *br); 1941 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1942 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1943 int br_cfm_status_fill_info(struct sk_buff *skb, 1944 struct net_bridge *br, 1945 bool getlink); 1946 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1947 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1948 #else 1949 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1950 struct nlattr *attr, int cmd, 1951 struct netlink_ext_ack *extack) 1952 { 1953 return -EOPNOTSUPP; 1954 } 1955 1956 static inline bool br_cfm_created(struct net_bridge *br) 1957 { 1958 return false; 1959 } 1960 1961 static inline void br_cfm_port_del(struct net_bridge *br, 1962 struct net_bridge_port *p) 1963 { 1964 } 1965 1966 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1967 { 1968 return -EOPNOTSUPP; 1969 } 1970 1971 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1972 struct net_bridge *br, 1973 bool getlink) 1974 { 1975 return -EOPNOTSUPP; 1976 } 1977 1978 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1979 { 1980 *count = 0; 1981 return -EOPNOTSUPP; 1982 } 1983 1984 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1985 { 1986 *count = 0; 1987 return -EOPNOTSUPP; 1988 } 1989 #endif 1990 1991 /* br_netlink.c */ 1992 extern struct rtnl_link_ops br_link_ops; 1993 int br_netlink_init(void); 1994 void br_netlink_fini(void); 1995 void br_ifinfo_notify(int event, const struct net_bridge *br, 1996 const struct net_bridge_port *port); 1997 void br_info_notify(int event, const struct net_bridge *br, 1998 const struct net_bridge_port *port, u32 filter); 1999 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2000 struct netlink_ext_ack *extack); 2001 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2002 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2003 u32 filter_mask, int nlflags); 2004 int br_process_vlan_info(struct net_bridge *br, 2005 struct net_bridge_port *p, int cmd, 2006 struct bridge_vlan_info *vinfo_curr, 2007 struct bridge_vlan_info **vinfo_last, 2008 bool *changed, 2009 struct netlink_ext_ack *extack); 2010 2011 #ifdef CONFIG_SYSFS 2012 /* br_sysfs_if.c */ 2013 extern const struct sysfs_ops brport_sysfs_ops; 2014 int br_sysfs_addif(struct net_bridge_port *p); 2015 int br_sysfs_renameif(struct net_bridge_port *p); 2016 2017 /* br_sysfs_br.c */ 2018 int br_sysfs_addbr(struct net_device *dev); 2019 void br_sysfs_delbr(struct net_device *dev); 2020 2021 #else 2022 2023 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2024 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2025 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2026 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2027 #endif /* CONFIG_SYSFS */ 2028 2029 /* br_switchdev.c */ 2030 #ifdef CONFIG_NET_SWITCHDEV 2031 int br_switchdev_port_offload(struct net_bridge_port *p, 2032 struct net_device *dev, const void *ctx, 2033 struct notifier_block *atomic_nb, 2034 struct notifier_block *blocking_nb, 2035 bool tx_fwd_offload, 2036 struct netlink_ext_ack *extack); 2037 2038 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2039 struct notifier_block *atomic_nb, 2040 struct notifier_block *blocking_nb); 2041 2042 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2043 2044 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2045 2046 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2047 struct sk_buff *skb); 2048 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2049 struct sk_buff *skb); 2050 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2051 struct sk_buff *skb); 2052 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2053 const struct sk_buff *skb); 2054 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2055 unsigned long flags, 2056 unsigned long mask, 2057 struct netlink_ext_ack *extack); 2058 void br_switchdev_fdb_notify(struct net_bridge *br, 2059 const struct net_bridge_fdb_entry *fdb, int type); 2060 void br_switchdev_mdb_notify(struct net_device *dev, 2061 struct net_bridge_mdb_entry *mp, 2062 struct net_bridge_port_group *pg, 2063 int type); 2064 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2065 bool changed, struct netlink_ext_ack *extack); 2066 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2067 void br_switchdev_init(struct net_bridge *br); 2068 2069 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2070 { 2071 skb->offload_fwd_mark = 0; 2072 } 2073 #else 2074 static inline int 2075 br_switchdev_port_offload(struct net_bridge_port *p, 2076 struct net_device *dev, const void *ctx, 2077 struct notifier_block *atomic_nb, 2078 struct notifier_block *blocking_nb, 2079 bool tx_fwd_offload, 2080 struct netlink_ext_ack *extack) 2081 { 2082 return -EOPNOTSUPP; 2083 } 2084 2085 static inline void 2086 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2087 struct notifier_block *atomic_nb, 2088 struct notifier_block *blocking_nb) 2089 { 2090 } 2091 2092 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2093 { 2094 return false; 2095 } 2096 2097 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2098 { 2099 } 2100 2101 static inline void 2102 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2103 struct sk_buff *skb) 2104 { 2105 } 2106 2107 static inline void 2108 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2109 struct sk_buff *skb) 2110 { 2111 } 2112 2113 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2114 struct sk_buff *skb) 2115 { 2116 } 2117 2118 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2119 const struct sk_buff *skb) 2120 { 2121 return true; 2122 } 2123 2124 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2125 unsigned long flags, 2126 unsigned long mask, 2127 struct netlink_ext_ack *extack) 2128 { 2129 return 0; 2130 } 2131 2132 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2133 u16 flags, bool changed, 2134 struct netlink_ext_ack *extack) 2135 { 2136 return -EOPNOTSUPP; 2137 } 2138 2139 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2140 { 2141 return -EOPNOTSUPP; 2142 } 2143 2144 static inline void 2145 br_switchdev_fdb_notify(struct net_bridge *br, 2146 const struct net_bridge_fdb_entry *fdb, int type) 2147 { 2148 } 2149 2150 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2151 struct net_bridge_mdb_entry *mp, 2152 struct net_bridge_port_group *pg, 2153 int type) 2154 { 2155 } 2156 2157 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2158 { 2159 } 2160 2161 static inline void br_switchdev_init(struct net_bridge *br) 2162 { 2163 } 2164 2165 #endif /* CONFIG_NET_SWITCHDEV */ 2166 2167 /* br_arp_nd_proxy.c */ 2168 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2169 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2170 u16 vid, struct net_bridge_port *p); 2171 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2172 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2173 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2174 #endif 2175