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