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