1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 32 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 33 34 #define BR_HWDOM_MAX BITS_PER_LONG 35 36 #define BR_VERSION "2.3" 37 38 /* Control of forwarding link local multicast */ 39 #define BR_GROUPFWD_DEFAULT 0 40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 41 enum { 42 BR_GROUPFWD_STP = BIT(0), 43 BR_GROUPFWD_MACPAUSE = BIT(1), 44 BR_GROUPFWD_LACP = BIT(2), 45 }; 46 47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 48 BR_GROUPFWD_LACP) 49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 50 #define BR_GROUPFWD_8021AD 0xB801u 51 52 /* Path to usermode spanning tree program */ 53 #define BR_STP_PROG "/sbin/bridge-stp" 54 55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 56 57 typedef struct bridge_id bridge_id; 58 typedef struct mac_addr mac_addr; 59 typedef __u16 port_id; 60 61 struct bridge_id { 62 unsigned char prio[2]; 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 struct mac_addr { 67 unsigned char addr[ETH_ALEN]; 68 }; 69 70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 71 /* our own querier */ 72 struct bridge_mcast_own_query { 73 struct timer_list timer; 74 u32 startup_sent; 75 }; 76 77 /* other querier */ 78 struct bridge_mcast_other_query { 79 struct timer_list timer; 80 unsigned long delay_time; 81 }; 82 83 /* selected querier */ 84 struct bridge_mcast_querier { 85 struct br_ip addr; 86 int port_ifidx; 87 seqcount_spinlock_t seq; 88 }; 89 90 /* IGMP/MLD statistics */ 91 struct bridge_mcast_stats { 92 struct br_mcast_stats mstats; 93 struct u64_stats_sync syncp; 94 }; 95 #endif 96 97 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 98 struct net_bridge_mcast_port { 99 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 100 struct net_bridge_port *port; 101 struct net_bridge_vlan *vlan; 102 103 struct bridge_mcast_own_query ip4_own_query; 104 struct timer_list ip4_mc_router_timer; 105 struct hlist_node ip4_rlist; 106 #if IS_ENABLED(CONFIG_IPV6) 107 struct bridge_mcast_own_query ip6_own_query; 108 struct timer_list ip6_mc_router_timer; 109 struct hlist_node ip6_rlist; 110 #endif /* IS_ENABLED(CONFIG_IPV6) */ 111 unsigned char multicast_router; 112 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 113 }; 114 115 /* net_bridge_mcast must be always defined due to forwarding stubs */ 116 struct net_bridge_mcast { 117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 118 struct net_bridge *br; 119 struct net_bridge_vlan *vlan; 120 121 u32 multicast_last_member_count; 122 u32 multicast_startup_query_count; 123 124 u8 multicast_querier; 125 u8 multicast_igmp_version; 126 u8 multicast_router; 127 #if IS_ENABLED(CONFIG_IPV6) 128 u8 multicast_mld_version; 129 #endif 130 unsigned long multicast_last_member_interval; 131 unsigned long multicast_membership_interval; 132 unsigned long multicast_querier_interval; 133 unsigned long multicast_query_interval; 134 unsigned long multicast_query_response_interval; 135 unsigned long multicast_startup_query_interval; 136 struct hlist_head ip4_mc_router_list; 137 struct timer_list ip4_mc_router_timer; 138 struct bridge_mcast_other_query ip4_other_query; 139 struct bridge_mcast_own_query ip4_own_query; 140 struct bridge_mcast_querier ip4_querier; 141 #if IS_ENABLED(CONFIG_IPV6) 142 struct hlist_head ip6_mc_router_list; 143 struct timer_list ip6_mc_router_timer; 144 struct bridge_mcast_other_query ip6_other_query; 145 struct bridge_mcast_own_query ip6_own_query; 146 struct bridge_mcast_querier ip6_querier; 147 #endif /* IS_ENABLED(CONFIG_IPV6) */ 148 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 149 }; 150 151 struct br_tunnel_info { 152 __be64 tunnel_id; 153 struct metadata_dst __rcu *tunnel_dst; 154 }; 155 156 /* private vlan flags */ 157 enum { 158 BR_VLFLAG_PER_PORT_STATS = BIT(0), 159 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 160 BR_VLFLAG_MCAST_ENABLED = BIT(2), 161 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 162 }; 163 164 /** 165 * struct net_bridge_vlan - per-vlan entry 166 * 167 * @vnode: rhashtable member 168 * @vid: VLAN id 169 * @flags: bridge vlan flags 170 * @priv_flags: private (in-kernel) bridge vlan flags 171 * @state: STP state (e.g. blocking, learning, forwarding) 172 * @stats: per-cpu VLAN statistics 173 * @br: if MASTER flag set, this points to a bridge struct 174 * @port: if MASTER flag unset, this points to a port struct 175 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 176 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 177 * for this VLAN entry 178 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 179 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 180 * context 181 * @msti: if MASTER flag set, this holds the VLANs MST instance 182 * @vlist: sorted list of VLAN entries 183 * @rcu: used for entry destruction 184 * 185 * This structure is shared between the global per-VLAN entries contained in 186 * the bridge rhashtable and the local per-port per-VLAN entries contained in 187 * the port's rhashtable. The union entries should be interpreted depending on 188 * the entry flags that are set. 189 */ 190 struct net_bridge_vlan { 191 struct rhash_head vnode; 192 struct rhash_head tnode; 193 u16 vid; 194 u16 flags; 195 u16 priv_flags; 196 u8 state; 197 struct pcpu_sw_netstats __percpu *stats; 198 union { 199 struct net_bridge *br; 200 struct net_bridge_port *port; 201 }; 202 union { 203 refcount_t refcnt; 204 struct net_bridge_vlan *brvlan; 205 }; 206 207 struct br_tunnel_info tinfo; 208 209 union { 210 struct net_bridge_mcast br_mcast_ctx; 211 struct net_bridge_mcast_port port_mcast_ctx; 212 }; 213 214 u16 msti; 215 216 struct list_head vlist; 217 218 struct rcu_head rcu; 219 }; 220 221 /** 222 * struct net_bridge_vlan_group 223 * 224 * @vlan_hash: VLAN entry rhashtable 225 * @vlan_list: sorted VLAN entry list 226 * @num_vlans: number of total VLAN entries 227 * @pvid: PVID VLAN id 228 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 229 * 230 * IMPORTANT: Be careful when checking if there're VLAN entries using list 231 * primitives because the bridge can have entries in its list which 232 * are just for global context but not for filtering, i.e. they have 233 * the master flag set but not the brentry flag. If you have to check 234 * if there're "real" entries in the bridge please test @num_vlans 235 */ 236 struct net_bridge_vlan_group { 237 struct rhashtable vlan_hash; 238 struct rhashtable tunnel_hash; 239 struct list_head vlan_list; 240 u16 num_vlans; 241 u16 pvid; 242 u8 pvid_state; 243 }; 244 245 /* bridge fdb flags */ 246 enum { 247 BR_FDB_LOCAL, 248 BR_FDB_STATIC, 249 BR_FDB_STICKY, 250 BR_FDB_ADDED_BY_USER, 251 BR_FDB_ADDED_BY_EXT_LEARN, 252 BR_FDB_OFFLOADED, 253 BR_FDB_NOTIFY, 254 BR_FDB_NOTIFY_INACTIVE, 255 BR_FDB_LOCKED, 256 }; 257 258 struct net_bridge_fdb_key { 259 mac_addr addr; 260 u16 vlan_id; 261 }; 262 263 struct net_bridge_fdb_entry { 264 struct rhash_head rhnode; 265 struct net_bridge_port *dst; 266 267 struct net_bridge_fdb_key key; 268 struct hlist_node fdb_node; 269 unsigned long flags; 270 271 /* write-heavy members should not affect lookups */ 272 unsigned long updated ____cacheline_aligned_in_smp; 273 unsigned long used; 274 275 struct rcu_head rcu; 276 }; 277 278 struct net_bridge_fdb_flush_desc { 279 unsigned long flags; 280 unsigned long flags_mask; 281 int port_ifindex; 282 u16 vlan_id; 283 }; 284 285 #define MDB_PG_FLAGS_PERMANENT BIT(0) 286 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 287 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 288 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 289 #define MDB_PG_FLAGS_BLOCKED BIT(4) 290 291 #define PG_SRC_ENT_LIMIT 32 292 293 #define BR_SGRP_F_DELETE BIT(0) 294 #define BR_SGRP_F_SEND BIT(1) 295 #define BR_SGRP_F_INSTALLED BIT(2) 296 297 struct net_bridge_mcast_gc { 298 struct hlist_node gc_node; 299 void (*destroy)(struct net_bridge_mcast_gc *gc); 300 }; 301 302 struct net_bridge_group_src { 303 struct hlist_node node; 304 305 struct br_ip addr; 306 struct net_bridge_port_group *pg; 307 u8 flags; 308 u8 src_query_rexmit_cnt; 309 struct timer_list timer; 310 311 struct net_bridge *br; 312 struct net_bridge_mcast_gc mcast_gc; 313 struct rcu_head rcu; 314 }; 315 316 struct net_bridge_port_group_sg_key { 317 struct net_bridge_port *port; 318 struct br_ip addr; 319 }; 320 321 struct net_bridge_port_group { 322 struct net_bridge_port_group __rcu *next; 323 struct net_bridge_port_group_sg_key key; 324 unsigned char eth_addr[ETH_ALEN] __aligned(2); 325 unsigned char flags; 326 unsigned char filter_mode; 327 unsigned char grp_query_rexmit_cnt; 328 unsigned char rt_protocol; 329 330 struct hlist_head src_list; 331 unsigned int src_ents; 332 struct timer_list timer; 333 struct timer_list rexmit_timer; 334 struct hlist_node mglist; 335 struct rb_root eht_set_tree; 336 struct rb_root eht_host_tree; 337 338 struct rhash_head rhnode; 339 struct net_bridge_mcast_gc mcast_gc; 340 struct rcu_head rcu; 341 }; 342 343 struct net_bridge_mdb_entry { 344 struct rhash_head rhnode; 345 struct net_bridge *br; 346 struct net_bridge_port_group __rcu *ports; 347 struct br_ip addr; 348 bool host_joined; 349 350 struct timer_list timer; 351 struct hlist_node mdb_node; 352 353 struct net_bridge_mcast_gc mcast_gc; 354 struct rcu_head rcu; 355 }; 356 357 struct net_bridge_port { 358 struct net_bridge *br; 359 struct net_device *dev; 360 netdevice_tracker dev_tracker; 361 struct list_head list; 362 363 unsigned long flags; 364 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 365 struct net_bridge_vlan_group __rcu *vlgrp; 366 #endif 367 struct net_bridge_port __rcu *backup_port; 368 369 /* STP */ 370 u8 priority; 371 u8 state; 372 u16 port_no; 373 unsigned char topology_change_ack; 374 unsigned char config_pending; 375 port_id port_id; 376 port_id designated_port; 377 bridge_id designated_root; 378 bridge_id designated_bridge; 379 u32 path_cost; 380 u32 designated_cost; 381 unsigned long designated_age; 382 383 struct timer_list forward_delay_timer; 384 struct timer_list hold_timer; 385 struct timer_list message_age_timer; 386 struct kobject kobj; 387 struct rcu_head rcu; 388 389 struct net_bridge_mcast_port multicast_ctx; 390 391 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 392 struct bridge_mcast_stats __percpu *mcast_stats; 393 394 u32 multicast_eht_hosts_limit; 395 u32 multicast_eht_hosts_cnt; 396 struct hlist_head mglist; 397 #endif 398 399 #ifdef CONFIG_SYSFS 400 char sysfs_name[IFNAMSIZ]; 401 #endif 402 403 #ifdef CONFIG_NET_POLL_CONTROLLER 404 struct netpoll *np; 405 #endif 406 #ifdef CONFIG_NET_SWITCHDEV 407 /* Identifier used to group ports that share the same switchdev 408 * hardware domain. 409 */ 410 int hwdom; 411 int offload_count; 412 struct netdev_phys_item_id ppid; 413 #endif 414 u16 group_fwd_mask; 415 u16 backup_redirected_cnt; 416 417 struct bridge_stp_xstats stp_xstats; 418 }; 419 420 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 421 422 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 423 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 424 425 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 426 { 427 return rcu_dereference(dev->rx_handler_data); 428 } 429 430 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 431 { 432 return netif_is_bridge_port(dev) ? 433 rtnl_dereference(dev->rx_handler_data) : NULL; 434 } 435 436 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 437 { 438 return netif_is_bridge_port(dev) ? 439 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 440 } 441 442 enum net_bridge_opts { 443 BROPT_VLAN_ENABLED, 444 BROPT_VLAN_STATS_ENABLED, 445 BROPT_NF_CALL_IPTABLES, 446 BROPT_NF_CALL_IP6TABLES, 447 BROPT_NF_CALL_ARPTABLES, 448 BROPT_GROUP_ADDR_SET, 449 BROPT_MULTICAST_ENABLED, 450 BROPT_MULTICAST_QUERY_USE_IFADDR, 451 BROPT_MULTICAST_STATS_ENABLED, 452 BROPT_HAS_IPV6_ADDR, 453 BROPT_NEIGH_SUPPRESS_ENABLED, 454 BROPT_MTU_SET_BY_USER, 455 BROPT_VLAN_STATS_PER_PORT, 456 BROPT_NO_LL_LEARN, 457 BROPT_VLAN_BRIDGE_BINDING, 458 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 459 BROPT_MST_ENABLED, 460 }; 461 462 struct net_bridge { 463 spinlock_t lock; 464 spinlock_t hash_lock; 465 struct hlist_head frame_type_list; 466 struct net_device *dev; 467 unsigned long options; 468 /* These fields are accessed on each packet */ 469 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 470 __be16 vlan_proto; 471 u16 default_pvid; 472 struct net_bridge_vlan_group __rcu *vlgrp; 473 #endif 474 475 struct rhashtable fdb_hash_tbl; 476 struct list_head port_list; 477 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 478 union { 479 struct rtable fake_rtable; 480 struct rt6_info fake_rt6_info; 481 }; 482 #endif 483 u16 group_fwd_mask; 484 u16 group_fwd_mask_required; 485 486 /* STP */ 487 bridge_id designated_root; 488 bridge_id bridge_id; 489 unsigned char topology_change; 490 unsigned char topology_change_detected; 491 u16 root_port; 492 unsigned long max_age; 493 unsigned long hello_time; 494 unsigned long forward_delay; 495 unsigned long ageing_time; 496 unsigned long bridge_max_age; 497 unsigned long bridge_hello_time; 498 unsigned long bridge_forward_delay; 499 unsigned long bridge_ageing_time; 500 u32 root_path_cost; 501 502 u8 group_addr[ETH_ALEN]; 503 504 enum { 505 BR_NO_STP, /* no spanning tree */ 506 BR_KERNEL_STP, /* old STP in kernel */ 507 BR_USER_STP, /* new RSTP in userspace */ 508 } stp_enabled; 509 510 struct net_bridge_mcast multicast_ctx; 511 512 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 513 struct bridge_mcast_stats __percpu *mcast_stats; 514 515 u32 hash_max; 516 517 spinlock_t multicast_lock; 518 519 struct rhashtable mdb_hash_tbl; 520 struct rhashtable sg_port_tbl; 521 522 struct hlist_head mcast_gc_list; 523 struct hlist_head mdb_list; 524 525 struct work_struct mcast_gc_work; 526 #endif 527 528 struct timer_list hello_timer; 529 struct timer_list tcn_timer; 530 struct timer_list topology_change_timer; 531 struct delayed_work gc_work; 532 struct kobject *ifobj; 533 u32 auto_cnt; 534 535 #ifdef CONFIG_NET_SWITCHDEV 536 /* Counter used to make sure that hardware domains get unique 537 * identifiers in case a bridge spans multiple switchdev instances. 538 */ 539 int last_hwdom; 540 /* Bit mask of hardware domain numbers in use */ 541 unsigned long busy_hwdoms; 542 #endif 543 struct hlist_head fdb_list; 544 545 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 546 struct hlist_head mrp_list; 547 #endif 548 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 549 struct hlist_head mep_list; 550 #endif 551 }; 552 553 struct br_input_skb_cb { 554 struct net_device *brdev; 555 556 u16 frag_max_size; 557 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 558 u8 igmp; 559 u8 mrouters_only:1; 560 #endif 561 u8 proxyarp_replied:1; 562 u8 src_port_isolated:1; 563 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 564 u8 vlan_filtered:1; 565 #endif 566 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 567 u8 br_netfilter_broute:1; 568 #endif 569 570 #ifdef CONFIG_NET_SWITCHDEV 571 /* Set if TX data plane offloading is used towards at least one 572 * hardware domain. 573 */ 574 u8 tx_fwd_offload:1; 575 /* The switchdev hardware domain from which this packet was received. 576 * If skb->offload_fwd_mark was set, then this packet was already 577 * forwarded by hardware to the other ports in the source hardware 578 * domain, otherwise it wasn't. 579 */ 580 int src_hwdom; 581 /* Bit mask of hardware domains towards this packet has already been 582 * transmitted using the TX data plane offload. 583 */ 584 unsigned long fwd_hwdoms; 585 #endif 586 }; 587 588 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 589 590 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 591 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 592 #else 593 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 594 #endif 595 596 #define br_printk(level, br, format, args...) \ 597 printk(level "%s: " format, (br)->dev->name, ##args) 598 599 #define br_err(__br, format, args...) \ 600 br_printk(KERN_ERR, __br, format, ##args) 601 #define br_warn(__br, format, args...) \ 602 br_printk(KERN_WARNING, __br, format, ##args) 603 #define br_notice(__br, format, args...) \ 604 br_printk(KERN_NOTICE, __br, format, ##args) 605 #define br_info(__br, format, args...) \ 606 br_printk(KERN_INFO, __br, format, ##args) 607 608 #define br_debug(br, format, args...) \ 609 pr_debug("%s: " format, (br)->dev->name, ##args) 610 611 /* called under bridge lock */ 612 static inline int br_is_root_bridge(const struct net_bridge *br) 613 { 614 return !memcmp(&br->bridge_id, &br->designated_root, 8); 615 } 616 617 /* check if a VLAN entry is global */ 618 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 619 { 620 return v->flags & BRIDGE_VLAN_INFO_MASTER; 621 } 622 623 /* check if a VLAN entry is used by the bridge */ 624 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 625 { 626 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 627 } 628 629 /* check if we should use the vlan entry, returns false if it's only context */ 630 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 631 { 632 if (br_vlan_is_master(v)) { 633 if (br_vlan_is_brentry(v)) 634 return true; 635 else 636 return false; 637 } 638 639 return true; 640 } 641 642 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 643 { 644 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 645 } 646 647 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 648 { 649 bool ret = vid > 0 && vid < VLAN_VID_MASK; 650 651 if (!ret) 652 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 653 654 return ret; 655 } 656 657 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 658 const struct bridge_vlan_info *last, 659 struct netlink_ext_ack *extack) 660 { 661 /* pvid flag is not allowed in ranges */ 662 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 663 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 664 return false; 665 } 666 667 /* when cur is the range end, check if: 668 * - it has range start flag 669 * - range ids are invalid (end is equal to or before start) 670 */ 671 if (last) { 672 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 673 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 674 return false; 675 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 676 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 677 return false; 678 } else if (cur->vid <= last->vid) { 679 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 680 return false; 681 } 682 } 683 684 /* check for required range flags */ 685 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 686 BRIDGE_VLAN_INFO_RANGE_END))) { 687 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 688 return false; 689 } 690 691 return true; 692 } 693 694 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 695 { 696 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 697 698 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 699 if (!br_vlan_is_master(v)) 700 mcast_router = v->port_mcast_ctx.multicast_router; 701 else 702 mcast_router = v->br_mcast_ctx.multicast_router; 703 #endif 704 705 return mcast_router; 706 } 707 708 static inline int br_afspec_cmd_to_rtm(int cmd) 709 { 710 switch (cmd) { 711 case RTM_SETLINK: 712 return RTM_NEWVLAN; 713 case RTM_DELLINK: 714 return RTM_DELVLAN; 715 } 716 717 return 0; 718 } 719 720 static inline int br_opt_get(const struct net_bridge *br, 721 enum net_bridge_opts opt) 722 { 723 return test_bit(opt, &br->options); 724 } 725 726 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 727 struct netlink_ext_ack *extack); 728 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 729 int br_boolopt_multi_toggle(struct net_bridge *br, 730 struct br_boolopt_multi *bm, 731 struct netlink_ext_ack *extack); 732 void br_boolopt_multi_get(const struct net_bridge *br, 733 struct br_boolopt_multi *bm); 734 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 735 736 /* br_device.c */ 737 void br_dev_setup(struct net_device *dev); 738 void br_dev_delete(struct net_device *dev, struct list_head *list); 739 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 740 #ifdef CONFIG_NET_POLL_CONTROLLER 741 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 742 struct sk_buff *skb) 743 { 744 netpoll_send_skb(p->np, skb); 745 } 746 747 int br_netpoll_enable(struct net_bridge_port *p); 748 void br_netpoll_disable(struct net_bridge_port *p); 749 #else 750 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 751 struct sk_buff *skb) 752 { 753 } 754 755 static inline int br_netpoll_enable(struct net_bridge_port *p) 756 { 757 return 0; 758 } 759 760 static inline void br_netpoll_disable(struct net_bridge_port *p) 761 { 762 } 763 #endif 764 765 /* br_fdb.c */ 766 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 767 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 768 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 769 NTF_STICKY | NTF_OFFLOADED) 770 771 int br_fdb_init(void); 772 void br_fdb_fini(void); 773 int br_fdb_hash_init(struct net_bridge *br); 774 void br_fdb_hash_fini(struct net_bridge *br); 775 void br_fdb_flush(struct net_bridge *br, 776 const struct net_bridge_fdb_flush_desc *desc); 777 void br_fdb_find_delete_local(struct net_bridge *br, 778 const struct net_bridge_port *p, 779 const unsigned char *addr, u16 vid); 780 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 781 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 782 void br_fdb_cleanup(struct work_struct *work); 783 void br_fdb_delete_by_port(struct net_bridge *br, 784 const struct net_bridge_port *p, u16 vid, int do_all); 785 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 786 const unsigned char *addr, 787 __u16 vid); 788 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 789 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 790 unsigned long off); 791 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 792 const unsigned char *addr, u16 vid); 793 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 794 const unsigned char *addr, u16 vid, unsigned long flags); 795 796 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 797 struct net_device *dev, const unsigned char *addr, u16 vid, 798 struct netlink_ext_ack *extack); 799 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], 800 struct net_device *dev, u16 vid, 801 struct netlink_ext_ack *extack); 802 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 803 const unsigned char *addr, u16 vid, u16 nlh_flags, 804 struct netlink_ext_ack *extack); 805 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 806 struct net_device *dev, struct net_device *fdev, int *idx); 807 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 808 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 809 struct netlink_ext_ack *extack); 810 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 811 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 812 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 813 const unsigned char *addr, u16 vid, 814 bool locked, bool swdev_notify); 815 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 816 const unsigned char *addr, u16 vid, 817 bool swdev_notify); 818 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 819 const unsigned char *addr, u16 vid, bool offloaded); 820 821 /* br_forward.c */ 822 enum br_pkt_type { 823 BR_PKT_UNICAST, 824 BR_PKT_MULTICAST, 825 BR_PKT_BROADCAST 826 }; 827 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 828 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 829 bool local_rcv, bool local_orig); 830 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 831 void br_flood(struct net_bridge *br, struct sk_buff *skb, 832 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 833 834 /* return true if both source port and dest port are isolated */ 835 static inline bool br_skb_isolated(const struct net_bridge_port *to, 836 const struct sk_buff *skb) 837 { 838 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 839 (to->flags & BR_ISOLATED); 840 } 841 842 /* br_if.c */ 843 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 844 int br_add_bridge(struct net *net, const char *name); 845 int br_del_bridge(struct net *net, const char *name); 846 int br_add_if(struct net_bridge *br, struct net_device *dev, 847 struct netlink_ext_ack *extack); 848 int br_del_if(struct net_bridge *br, struct net_device *dev); 849 void br_mtu_auto_adjust(struct net_bridge *br); 850 netdev_features_t br_features_recompute(struct net_bridge *br, 851 netdev_features_t features); 852 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 853 void br_manage_promisc(struct net_bridge *br); 854 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 855 856 /* br_input.c */ 857 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 858 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 859 860 struct br_frame_type { 861 __be16 type; 862 int (*frame_handler)(struct net_bridge_port *port, 863 struct sk_buff *skb); 864 struct hlist_node list; 865 }; 866 867 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 868 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 869 870 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 871 { 872 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 873 } 874 875 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 876 { 877 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 878 } 879 880 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 881 { 882 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 883 } 884 885 static inline struct net_bridge_port * 886 br_port_get_check_rtnl(const struct net_device *dev) 887 { 888 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 889 } 890 891 /* br_ioctl.c */ 892 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 893 void __user *data, int cmd); 894 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 895 struct ifreq *ifr, void __user *uarg); 896 897 /* br_multicast.c */ 898 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 899 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 900 struct net_bridge_mcast_port **pmctx, 901 struct net_bridge_vlan *vlan, 902 struct sk_buff *skb, u16 vid); 903 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 904 struct sk_buff *skb, u16 vid); 905 int br_multicast_add_port(struct net_bridge_port *port); 906 void br_multicast_del_port(struct net_bridge_port *port); 907 void br_multicast_enable_port(struct net_bridge_port *port); 908 void br_multicast_disable_port(struct net_bridge_port *port); 909 void br_multicast_init(struct net_bridge *br); 910 void br_multicast_join_snoopers(struct net_bridge *br); 911 void br_multicast_leave_snoopers(struct net_bridge *br); 912 void br_multicast_open(struct net_bridge *br); 913 void br_multicast_stop(struct net_bridge *br); 914 void br_multicast_dev_del(struct net_bridge *br); 915 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 916 struct net_bridge_mcast *brmctx, 917 bool local_rcv, bool local_orig); 918 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 919 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 920 unsigned long val); 921 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 922 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 923 struct netlink_ext_ack *extack); 924 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 925 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 926 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 927 unsigned long val); 928 #if IS_ENABLED(CONFIG_IPV6) 929 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 930 unsigned long val); 931 #endif 932 struct net_bridge_mdb_entry * 933 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 934 struct net_bridge_mdb_entry * 935 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 936 struct net_bridge_port_group * 937 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 938 struct net_bridge_port_group __rcu *next, 939 unsigned char flags, const unsigned char *src, 940 u8 filter_mode, u8 rt_protocol); 941 int br_mdb_hash_init(struct net_bridge *br); 942 void br_mdb_hash_fini(struct net_bridge *br); 943 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 944 struct net_bridge_port_group *pg, int type); 945 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 946 int type); 947 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 948 struct net_bridge_port_group *pg, 949 struct net_bridge_port_group __rcu **pp); 950 void br_multicast_count(struct net_bridge *br, 951 const struct net_bridge_port *p, 952 const struct sk_buff *skb, u8 type, u8 dir); 953 int br_multicast_init_stats(struct net_bridge *br); 954 void br_multicast_uninit_stats(struct net_bridge *br); 955 void br_multicast_get_stats(const struct net_bridge *br, 956 const struct net_bridge_port *p, 957 struct br_mcast_stats *dest); 958 void br_mdb_init(void); 959 void br_mdb_uninit(void); 960 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 961 struct net_bridge_mdb_entry *mp, bool notify); 962 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 963 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 964 u8 filter_mode); 965 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 966 struct net_bridge_port_group *sg); 967 struct net_bridge_group_src * 968 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 969 void br_multicast_del_group_src(struct net_bridge_group_src *src, 970 bool fastleave); 971 void br_multicast_ctx_init(struct net_bridge *br, 972 struct net_bridge_vlan *vlan, 973 struct net_bridge_mcast *brmctx); 974 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 975 void br_multicast_port_ctx_init(struct net_bridge_port *port, 976 struct net_bridge_vlan *vlan, 977 struct net_bridge_mcast_port *pmctx); 978 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 979 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 980 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 981 struct netlink_ext_ack *extack); 982 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 983 984 int br_rports_fill_info(struct sk_buff *skb, 985 const struct net_bridge_mcast *brmctx); 986 int br_multicast_dump_querier_state(struct sk_buff *skb, 987 const struct net_bridge_mcast *brmctx, 988 int nest_attr); 989 size_t br_multicast_querier_state_size(void); 990 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 991 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 992 unsigned long val); 993 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 994 unsigned long val); 995 996 static inline bool br_group_is_l2(const struct br_ip *group) 997 { 998 return group->proto == 0; 999 } 1000 1001 #define mlock_dereference(X, br) \ 1002 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1003 1004 static inline struct hlist_node * 1005 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1006 struct sk_buff *skb) 1007 { 1008 #if IS_ENABLED(CONFIG_IPV6) 1009 if (skb->protocol == htons(ETH_P_IPV6)) 1010 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1011 #endif 1012 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1013 } 1014 1015 static inline struct net_bridge_port * 1016 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1017 { 1018 struct net_bridge_mcast_port *mctx; 1019 1020 #if IS_ENABLED(CONFIG_IPV6) 1021 if (skb->protocol == htons(ETH_P_IPV6)) 1022 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1023 ip6_rlist); 1024 else 1025 #endif 1026 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1027 ip4_rlist); 1028 1029 if (mctx) 1030 return mctx->port; 1031 else 1032 return NULL; 1033 } 1034 1035 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1036 { 1037 return timer_pending(&brmctx->ip4_mc_router_timer); 1038 } 1039 1040 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1041 { 1042 #if IS_ENABLED(CONFIG_IPV6) 1043 return timer_pending(&brmctx->ip6_mc_router_timer); 1044 #else 1045 return false; 1046 #endif 1047 } 1048 1049 static inline bool 1050 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1051 { 1052 switch (brmctx->multicast_router) { 1053 case MDB_RTR_TYPE_PERM: 1054 return true; 1055 case MDB_RTR_TYPE_TEMP_QUERY: 1056 if (skb) { 1057 if (skb->protocol == htons(ETH_P_IP)) 1058 return br_ip4_multicast_is_router(brmctx); 1059 else if (skb->protocol == htons(ETH_P_IPV6)) 1060 return br_ip6_multicast_is_router(brmctx); 1061 } else { 1062 return br_ip4_multicast_is_router(brmctx) || 1063 br_ip6_multicast_is_router(brmctx); 1064 } 1065 fallthrough; 1066 default: 1067 return false; 1068 } 1069 } 1070 1071 static inline bool 1072 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1073 struct bridge_mcast_other_query *querier, 1074 const bool is_ipv6) 1075 { 1076 bool own_querier_enabled; 1077 1078 if (brmctx->multicast_querier) { 1079 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1080 own_querier_enabled = false; 1081 else 1082 own_querier_enabled = true; 1083 } else { 1084 own_querier_enabled = false; 1085 } 1086 1087 return time_is_before_jiffies(querier->delay_time) && 1088 (own_querier_enabled || timer_pending(&querier->timer)); 1089 } 1090 1091 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1092 struct ethhdr *eth, 1093 const struct net_bridge_mdb_entry *mdb) 1094 { 1095 switch (eth->h_proto) { 1096 case (htons(ETH_P_IP)): 1097 return __br_multicast_querier_exists(brmctx, 1098 &brmctx->ip4_other_query, false); 1099 #if IS_ENABLED(CONFIG_IPV6) 1100 case (htons(ETH_P_IPV6)): 1101 return __br_multicast_querier_exists(brmctx, 1102 &brmctx->ip6_other_query, true); 1103 #endif 1104 default: 1105 return !!mdb && br_group_is_l2(&mdb->addr); 1106 } 1107 } 1108 1109 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1110 { 1111 switch (ip->proto) { 1112 case htons(ETH_P_IP): 1113 return ipv4_is_zeronet(ip->src.ip4); 1114 #if IS_ENABLED(CONFIG_IPV6) 1115 case htons(ETH_P_IPV6): 1116 return ipv6_addr_any(&ip->src.ip6); 1117 #endif 1118 default: 1119 return false; 1120 } 1121 } 1122 1123 static inline bool 1124 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1125 __be16 proto) 1126 { 1127 switch (proto) { 1128 case htons(ETH_P_IP): 1129 return !!(brmctx->multicast_igmp_version == 3); 1130 #if IS_ENABLED(CONFIG_IPV6) 1131 case htons(ETH_P_IPV6): 1132 return !!(brmctx->multicast_mld_version == 2); 1133 #endif 1134 default: 1135 return false; 1136 } 1137 } 1138 1139 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1140 { 1141 return BR_INPUT_SKB_CB(skb)->igmp; 1142 } 1143 1144 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1145 { 1146 return brmctx->multicast_last_member_interval * 1147 brmctx->multicast_last_member_count; 1148 } 1149 1150 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1151 { 1152 return brmctx->multicast_membership_interval; 1153 } 1154 1155 static inline bool 1156 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1157 { 1158 return !!brmctx->vlan; 1159 } 1160 1161 static inline bool 1162 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1163 { 1164 return !!pmctx->vlan; 1165 } 1166 1167 static inline struct net_bridge_mcast * 1168 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1169 { 1170 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1171 return &pmctx->port->br->multicast_ctx; 1172 else 1173 return &pmctx->vlan->brvlan->br_mcast_ctx; 1174 } 1175 1176 static inline bool 1177 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1178 { 1179 return br_multicast_ctx_is_vlan(brmctx) && 1180 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1181 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1182 } 1183 1184 static inline bool 1185 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1186 { 1187 return br_multicast_ctx_is_vlan(brmctx) && 1188 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1189 } 1190 1191 static inline bool 1192 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1193 { 1194 return br_multicast_port_ctx_is_vlan(pmctx) && 1195 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1196 } 1197 1198 static inline bool 1199 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1200 { 1201 return pmctx->port->state == BR_STATE_DISABLED || 1202 (br_multicast_port_ctx_is_vlan(pmctx) && 1203 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1204 pmctx->vlan->state == BR_STATE_DISABLED)); 1205 } 1206 1207 static inline bool 1208 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1209 { 1210 return br_multicast_port_ctx_state_disabled(pmctx) || 1211 pmctx->port->state == BR_STATE_BLOCKING || 1212 (br_multicast_port_ctx_is_vlan(pmctx) && 1213 pmctx->vlan->state == BR_STATE_BLOCKING); 1214 } 1215 1216 static inline bool 1217 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1218 { 1219 #if IS_ENABLED(CONFIG_IPV6) 1220 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1221 !hlist_empty(&brmctx->ip6_mc_router_list); 1222 #else 1223 return !hlist_empty(&brmctx->ip4_mc_router_list); 1224 #endif 1225 } 1226 1227 static inline bool 1228 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1229 const struct net_bridge_mcast *brmctx2) 1230 { 1231 return brmctx1->multicast_igmp_version == 1232 brmctx2->multicast_igmp_version && 1233 brmctx1->multicast_last_member_count == 1234 brmctx2->multicast_last_member_count && 1235 brmctx1->multicast_startup_query_count == 1236 brmctx2->multicast_startup_query_count && 1237 brmctx1->multicast_last_member_interval == 1238 brmctx2->multicast_last_member_interval && 1239 brmctx1->multicast_membership_interval == 1240 brmctx2->multicast_membership_interval && 1241 brmctx1->multicast_querier_interval == 1242 brmctx2->multicast_querier_interval && 1243 brmctx1->multicast_query_interval == 1244 brmctx2->multicast_query_interval && 1245 brmctx1->multicast_query_response_interval == 1246 brmctx2->multicast_query_response_interval && 1247 brmctx1->multicast_startup_query_interval == 1248 brmctx2->multicast_startup_query_interval && 1249 brmctx1->multicast_querier == brmctx2->multicast_querier && 1250 brmctx1->multicast_router == brmctx2->multicast_router && 1251 !br_rports_have_mc_router(brmctx1) && 1252 !br_rports_have_mc_router(brmctx2) && 1253 #if IS_ENABLED(CONFIG_IPV6) 1254 brmctx1->multicast_mld_version == 1255 brmctx2->multicast_mld_version && 1256 #endif 1257 true; 1258 } 1259 1260 static inline bool 1261 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1262 { 1263 bool vlan_snooping_enabled; 1264 1265 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1266 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1267 1268 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1269 } 1270 #else 1271 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1272 struct net_bridge_mcast_port **pmctx, 1273 struct net_bridge_vlan *vlan, 1274 struct sk_buff *skb, 1275 u16 vid) 1276 { 1277 return 0; 1278 } 1279 1280 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1281 struct sk_buff *skb, u16 vid) 1282 { 1283 return NULL; 1284 } 1285 1286 static inline int br_multicast_add_port(struct net_bridge_port *port) 1287 { 1288 return 0; 1289 } 1290 1291 static inline void br_multicast_del_port(struct net_bridge_port *port) 1292 { 1293 } 1294 1295 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1296 { 1297 } 1298 1299 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1300 { 1301 } 1302 1303 static inline void br_multicast_init(struct net_bridge *br) 1304 { 1305 } 1306 1307 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1308 { 1309 } 1310 1311 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1312 { 1313 } 1314 1315 static inline void br_multicast_open(struct net_bridge *br) 1316 { 1317 } 1318 1319 static inline void br_multicast_stop(struct net_bridge *br) 1320 { 1321 } 1322 1323 static inline void br_multicast_dev_del(struct net_bridge *br) 1324 { 1325 } 1326 1327 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1328 struct sk_buff *skb, 1329 struct net_bridge_mcast *brmctx, 1330 bool local_rcv, bool local_orig) 1331 { 1332 } 1333 1334 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1335 struct sk_buff *skb) 1336 { 1337 return false; 1338 } 1339 1340 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1341 struct ethhdr *eth, 1342 const struct net_bridge_mdb_entry *mdb) 1343 { 1344 return false; 1345 } 1346 1347 static inline void br_mdb_init(void) 1348 { 1349 } 1350 1351 static inline void br_mdb_uninit(void) 1352 { 1353 } 1354 1355 static inline int br_mdb_hash_init(struct net_bridge *br) 1356 { 1357 return 0; 1358 } 1359 1360 static inline void br_mdb_hash_fini(struct net_bridge *br) 1361 { 1362 } 1363 1364 static inline void br_multicast_count(struct net_bridge *br, 1365 const struct net_bridge_port *p, 1366 const struct sk_buff *skb, 1367 u8 type, u8 dir) 1368 { 1369 } 1370 1371 static inline int br_multicast_init_stats(struct net_bridge *br) 1372 { 1373 return 0; 1374 } 1375 1376 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1377 { 1378 } 1379 1380 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1381 { 1382 return 0; 1383 } 1384 1385 static inline void br_multicast_ctx_init(struct net_bridge *br, 1386 struct net_bridge_vlan *vlan, 1387 struct net_bridge_mcast *brmctx) 1388 { 1389 } 1390 1391 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1392 { 1393 } 1394 1395 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1396 struct net_bridge_vlan *vlan, 1397 struct net_bridge_mcast_port *pmctx) 1398 { 1399 } 1400 1401 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1402 { 1403 } 1404 1405 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1406 bool on) 1407 { 1408 } 1409 1410 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1411 bool on, 1412 struct netlink_ext_ack *extack) 1413 { 1414 return -EOPNOTSUPP; 1415 } 1416 1417 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1418 bool on) 1419 { 1420 return false; 1421 } 1422 1423 static inline bool 1424 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1425 const struct net_bridge_mcast *brmctx2) 1426 { 1427 return true; 1428 } 1429 #endif 1430 1431 /* br_vlan.c */ 1432 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1433 bool br_allowed_ingress(const struct net_bridge *br, 1434 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1435 u16 *vid, u8 *state, 1436 struct net_bridge_vlan **vlan); 1437 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1438 const struct sk_buff *skb); 1439 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1440 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1441 const struct net_bridge_port *port, 1442 struct net_bridge_vlan_group *vg, 1443 struct sk_buff *skb); 1444 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1445 bool *changed, struct netlink_ext_ack *extack); 1446 int br_vlan_delete(struct net_bridge *br, u16 vid); 1447 void br_vlan_flush(struct net_bridge *br); 1448 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1449 void br_recalculate_fwd_mask(struct net_bridge *br); 1450 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1451 struct netlink_ext_ack *extack); 1452 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1453 struct netlink_ext_ack *extack); 1454 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1455 struct netlink_ext_ack *extack); 1456 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1457 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1458 int br_vlan_init(struct net_bridge *br); 1459 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1460 struct netlink_ext_ack *extack); 1461 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1462 struct netlink_ext_ack *extack); 1463 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1464 bool *changed, struct netlink_ext_ack *extack); 1465 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1466 void nbp_vlan_flush(struct net_bridge_port *port); 1467 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1468 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1469 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1470 struct pcpu_sw_netstats *stats); 1471 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1472 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1473 void *ptr); 1474 void br_vlan_rtnl_init(void); 1475 void br_vlan_rtnl_uninit(void); 1476 void br_vlan_notify(const struct net_bridge *br, 1477 const struct net_bridge_port *p, 1478 u16 vid, u16 vid_range, 1479 int cmd); 1480 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1481 const struct net_bridge_vlan *range_end); 1482 1483 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1484 struct net_device_path_ctx *ctx, 1485 struct net_device_path *path); 1486 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1487 struct net_bridge_port *dst, 1488 struct net_device_path *path); 1489 1490 static inline struct net_bridge_vlan_group *br_vlan_group( 1491 const struct net_bridge *br) 1492 { 1493 return rtnl_dereference(br->vlgrp); 1494 } 1495 1496 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1497 const struct net_bridge_port *p) 1498 { 1499 return rtnl_dereference(p->vlgrp); 1500 } 1501 1502 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1503 const struct net_bridge *br) 1504 { 1505 return rcu_dereference(br->vlgrp); 1506 } 1507 1508 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1509 const struct net_bridge_port *p) 1510 { 1511 return rcu_dereference(p->vlgrp); 1512 } 1513 1514 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1515 * skb, the vlan tag will always be present if the frame was tagged. 1516 */ 1517 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1518 { 1519 int err = 0; 1520 1521 if (skb_vlan_tag_present(skb)) { 1522 *vid = skb_vlan_tag_get_id(skb); 1523 } else { 1524 *vid = 0; 1525 err = -EINVAL; 1526 } 1527 1528 return err; 1529 } 1530 1531 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1532 { 1533 if (!vg) 1534 return 0; 1535 1536 smp_rmb(); 1537 return vg->pvid; 1538 } 1539 1540 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1541 { 1542 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1543 } 1544 #else 1545 static inline bool br_allowed_ingress(const struct net_bridge *br, 1546 struct net_bridge_vlan_group *vg, 1547 struct sk_buff *skb, 1548 u16 *vid, u8 *state, 1549 struct net_bridge_vlan **vlan) 1550 1551 { 1552 *vlan = NULL; 1553 return true; 1554 } 1555 1556 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1557 const struct sk_buff *skb) 1558 { 1559 return true; 1560 } 1561 1562 static inline bool br_should_learn(struct net_bridge_port *p, 1563 struct sk_buff *skb, u16 *vid) 1564 { 1565 return true; 1566 } 1567 1568 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1569 const struct net_bridge_port *port, 1570 struct net_bridge_vlan_group *vg, 1571 struct sk_buff *skb) 1572 { 1573 return skb; 1574 } 1575 1576 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1577 bool *changed, struct netlink_ext_ack *extack) 1578 { 1579 *changed = false; 1580 return -EOPNOTSUPP; 1581 } 1582 1583 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1584 { 1585 return -EOPNOTSUPP; 1586 } 1587 1588 static inline void br_vlan_flush(struct net_bridge *br) 1589 { 1590 } 1591 1592 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1593 { 1594 } 1595 1596 static inline int br_vlan_init(struct net_bridge *br) 1597 { 1598 return 0; 1599 } 1600 1601 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1602 bool *changed, struct netlink_ext_ack *extack) 1603 { 1604 *changed = false; 1605 return -EOPNOTSUPP; 1606 } 1607 1608 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1609 { 1610 return -EOPNOTSUPP; 1611 } 1612 1613 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1614 { 1615 } 1616 1617 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1618 u16 vid) 1619 { 1620 return NULL; 1621 } 1622 1623 static inline int nbp_vlan_init(struct net_bridge_port *port, 1624 struct netlink_ext_ack *extack) 1625 { 1626 return 0; 1627 } 1628 1629 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1630 { 1631 return 0; 1632 } 1633 1634 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1635 { 1636 return 0; 1637 } 1638 1639 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1640 unsigned long val, 1641 struct netlink_ext_ack *extack) 1642 { 1643 return -EOPNOTSUPP; 1644 } 1645 1646 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1647 u32 filter_mask) 1648 { 1649 return 0; 1650 } 1651 1652 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1653 struct net_device_path_ctx *ctx, 1654 struct net_device_path *path) 1655 { 1656 } 1657 1658 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1659 struct net_bridge_port *dst, 1660 struct net_device_path *path) 1661 { 1662 return 0; 1663 } 1664 1665 static inline struct net_bridge_vlan_group *br_vlan_group( 1666 const struct net_bridge *br) 1667 { 1668 return NULL; 1669 } 1670 1671 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1672 const struct net_bridge_port *p) 1673 { 1674 return NULL; 1675 } 1676 1677 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1678 const struct net_bridge *br) 1679 { 1680 return NULL; 1681 } 1682 1683 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1684 const struct net_bridge_port *p) 1685 { 1686 return NULL; 1687 } 1688 1689 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1690 struct pcpu_sw_netstats *stats) 1691 { 1692 } 1693 1694 static inline void br_vlan_port_event(struct net_bridge_port *p, 1695 unsigned long event) 1696 { 1697 } 1698 1699 static inline int br_vlan_bridge_event(struct net_device *dev, 1700 unsigned long event, void *ptr) 1701 { 1702 return 0; 1703 } 1704 1705 static inline void br_vlan_rtnl_init(void) 1706 { 1707 } 1708 1709 static inline void br_vlan_rtnl_uninit(void) 1710 { 1711 } 1712 1713 static inline void br_vlan_notify(const struct net_bridge *br, 1714 const struct net_bridge_port *p, 1715 u16 vid, u16 vid_range, 1716 int cmd) 1717 { 1718 } 1719 1720 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1721 const struct net_bridge_vlan *range_end) 1722 { 1723 return true; 1724 } 1725 1726 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1727 { 1728 return 0; 1729 } 1730 1731 #endif 1732 1733 /* br_vlan_options.c */ 1734 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1735 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1736 const struct net_bridge_vlan *range_end); 1737 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1738 size_t br_vlan_opts_nl_size(void); 1739 int br_vlan_process_options(const struct net_bridge *br, 1740 const struct net_bridge_port *p, 1741 struct net_bridge_vlan *range_start, 1742 struct net_bridge_vlan *range_end, 1743 struct nlattr **tb, 1744 struct netlink_ext_ack *extack); 1745 int br_vlan_rtm_process_global_options(struct net_device *dev, 1746 const struct nlattr *attr, 1747 int cmd, 1748 struct netlink_ext_ack *extack); 1749 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1750 const struct net_bridge_vlan *r_end); 1751 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1752 const struct net_bridge_vlan *v_opts); 1753 1754 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1755 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1756 { 1757 return READ_ONCE(v->state); 1758 } 1759 1760 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1761 { 1762 WRITE_ONCE(v->state, state); 1763 } 1764 1765 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1766 { 1767 return READ_ONCE(vg->pvid_state); 1768 } 1769 1770 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1771 u8 state) 1772 { 1773 WRITE_ONCE(vg->pvid_state, state); 1774 } 1775 1776 /* learn_allow is true at ingress and false at egress */ 1777 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1778 { 1779 switch (state) { 1780 case BR_STATE_LEARNING: 1781 return learn_allow; 1782 case BR_STATE_FORWARDING: 1783 return true; 1784 default: 1785 return false; 1786 } 1787 } 1788 #endif 1789 1790 /* br_mst.c */ 1791 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1792 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1793 static inline bool br_mst_is_enabled(struct net_bridge *br) 1794 { 1795 return static_branch_unlikely(&br_mst_used) && 1796 br_opt_get(br, BROPT_MST_ENABLED); 1797 } 1798 1799 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1800 struct netlink_ext_ack *extack); 1801 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1802 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1803 int br_mst_set_enabled(struct net_bridge *br, bool on, 1804 struct netlink_ext_ack *extack); 1805 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1806 int br_mst_fill_info(struct sk_buff *skb, 1807 const struct net_bridge_vlan_group *vg); 1808 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1809 struct netlink_ext_ack *extack); 1810 #else 1811 static inline bool br_mst_is_enabled(struct net_bridge *br) 1812 { 1813 return false; 1814 } 1815 1816 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1817 u8 state, struct netlink_ext_ack *extack) 1818 { 1819 return -EOPNOTSUPP; 1820 } 1821 1822 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1823 struct netlink_ext_ack *extack) 1824 { 1825 return -EOPNOTSUPP; 1826 } 1827 1828 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1829 { 1830 return 0; 1831 } 1832 1833 static inline int br_mst_fill_info(struct sk_buff *skb, 1834 const struct net_bridge_vlan_group *vg) 1835 { 1836 return -EOPNOTSUPP; 1837 } 1838 1839 static inline int br_mst_process(struct net_bridge_port *p, 1840 const struct nlattr *mst_attr, 1841 struct netlink_ext_ack *extack) 1842 { 1843 return -EOPNOTSUPP; 1844 } 1845 #endif 1846 1847 struct nf_br_ops { 1848 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1849 }; 1850 extern const struct nf_br_ops __rcu *nf_br_ops; 1851 1852 /* br_netfilter.c */ 1853 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1854 int br_nf_core_init(void); 1855 void br_nf_core_fini(void); 1856 void br_netfilter_rtable_init(struct net_bridge *); 1857 #else 1858 static inline int br_nf_core_init(void) { return 0; } 1859 static inline void br_nf_core_fini(void) {} 1860 #define br_netfilter_rtable_init(x) 1861 #endif 1862 1863 /* br_stp.c */ 1864 void br_set_state(struct net_bridge_port *p, unsigned int state); 1865 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1866 void br_init_port(struct net_bridge_port *p); 1867 void br_become_designated_port(struct net_bridge_port *p); 1868 1869 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1870 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1871 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1872 int br_set_max_age(struct net_bridge *br, unsigned long x); 1873 int __set_ageing_time(struct net_device *dev, unsigned long t); 1874 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1875 1876 1877 /* br_stp_if.c */ 1878 void br_stp_enable_bridge(struct net_bridge *br); 1879 void br_stp_disable_bridge(struct net_bridge *br); 1880 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1881 struct netlink_ext_ack *extack); 1882 void br_stp_enable_port(struct net_bridge_port *p); 1883 void br_stp_disable_port(struct net_bridge_port *p); 1884 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1885 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1886 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1887 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1888 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1889 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1890 1891 /* br_stp_bpdu.c */ 1892 struct stp_proto; 1893 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1894 struct net_device *dev); 1895 1896 /* br_stp_timer.c */ 1897 void br_stp_timer_init(struct net_bridge *br); 1898 void br_stp_port_timer_init(struct net_bridge_port *p); 1899 unsigned long br_timer_value(const struct timer_list *timer); 1900 1901 /* br.c */ 1902 #if IS_ENABLED(CONFIG_ATM_LANE) 1903 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1904 #endif 1905 1906 /* br_mrp.c */ 1907 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1908 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1909 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1910 bool br_mrp_enabled(struct net_bridge *br); 1911 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1912 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1913 #else 1914 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1915 struct nlattr *attr, int cmd, 1916 struct netlink_ext_ack *extack) 1917 { 1918 return -EOPNOTSUPP; 1919 } 1920 1921 static inline bool br_mrp_enabled(struct net_bridge *br) 1922 { 1923 return false; 1924 } 1925 1926 static inline void br_mrp_port_del(struct net_bridge *br, 1927 struct net_bridge_port *p) 1928 { 1929 } 1930 1931 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1932 { 1933 return 0; 1934 } 1935 1936 #endif 1937 1938 /* br_cfm.c */ 1939 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1940 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1941 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1942 bool br_cfm_created(struct net_bridge *br); 1943 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1944 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1945 int br_cfm_status_fill_info(struct sk_buff *skb, 1946 struct net_bridge *br, 1947 bool getlink); 1948 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1949 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1950 #else 1951 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1952 struct nlattr *attr, int cmd, 1953 struct netlink_ext_ack *extack) 1954 { 1955 return -EOPNOTSUPP; 1956 } 1957 1958 static inline bool br_cfm_created(struct net_bridge *br) 1959 { 1960 return false; 1961 } 1962 1963 static inline void br_cfm_port_del(struct net_bridge *br, 1964 struct net_bridge_port *p) 1965 { 1966 } 1967 1968 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1969 { 1970 return -EOPNOTSUPP; 1971 } 1972 1973 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1974 struct net_bridge *br, 1975 bool getlink) 1976 { 1977 return -EOPNOTSUPP; 1978 } 1979 1980 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1981 { 1982 *count = 0; 1983 return -EOPNOTSUPP; 1984 } 1985 1986 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1987 { 1988 *count = 0; 1989 return -EOPNOTSUPP; 1990 } 1991 #endif 1992 1993 /* br_netlink.c */ 1994 extern struct rtnl_link_ops br_link_ops; 1995 int br_netlink_init(void); 1996 void br_netlink_fini(void); 1997 void br_ifinfo_notify(int event, const struct net_bridge *br, 1998 const struct net_bridge_port *port); 1999 void br_info_notify(int event, const struct net_bridge *br, 2000 const struct net_bridge_port *port, u32 filter); 2001 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2002 struct netlink_ext_ack *extack); 2003 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2004 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2005 u32 filter_mask, int nlflags); 2006 int br_process_vlan_info(struct net_bridge *br, 2007 struct net_bridge_port *p, int cmd, 2008 struct bridge_vlan_info *vinfo_curr, 2009 struct bridge_vlan_info **vinfo_last, 2010 bool *changed, 2011 struct netlink_ext_ack *extack); 2012 2013 #ifdef CONFIG_SYSFS 2014 /* br_sysfs_if.c */ 2015 extern const struct sysfs_ops brport_sysfs_ops; 2016 int br_sysfs_addif(struct net_bridge_port *p); 2017 int br_sysfs_renameif(struct net_bridge_port *p); 2018 2019 /* br_sysfs_br.c */ 2020 int br_sysfs_addbr(struct net_device *dev); 2021 void br_sysfs_delbr(struct net_device *dev); 2022 2023 #else 2024 2025 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2026 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2027 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2028 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2029 #endif /* CONFIG_SYSFS */ 2030 2031 /* br_switchdev.c */ 2032 #ifdef CONFIG_NET_SWITCHDEV 2033 int br_switchdev_port_offload(struct net_bridge_port *p, 2034 struct net_device *dev, const void *ctx, 2035 struct notifier_block *atomic_nb, 2036 struct notifier_block *blocking_nb, 2037 bool tx_fwd_offload, 2038 struct netlink_ext_ack *extack); 2039 2040 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2041 struct notifier_block *atomic_nb, 2042 struct notifier_block *blocking_nb); 2043 2044 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2045 2046 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2047 2048 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2049 struct sk_buff *skb); 2050 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2051 struct sk_buff *skb); 2052 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2053 struct sk_buff *skb); 2054 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2055 const struct sk_buff *skb); 2056 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2057 unsigned long flags, 2058 unsigned long mask, 2059 struct netlink_ext_ack *extack); 2060 void br_switchdev_fdb_notify(struct net_bridge *br, 2061 const struct net_bridge_fdb_entry *fdb, int type); 2062 void br_switchdev_mdb_notify(struct net_device *dev, 2063 struct net_bridge_mdb_entry *mp, 2064 struct net_bridge_port_group *pg, 2065 int type); 2066 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2067 bool changed, struct netlink_ext_ack *extack); 2068 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2069 void br_switchdev_init(struct net_bridge *br); 2070 2071 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2072 { 2073 skb->offload_fwd_mark = 0; 2074 } 2075 #else 2076 static inline int 2077 br_switchdev_port_offload(struct net_bridge_port *p, 2078 struct net_device *dev, const void *ctx, 2079 struct notifier_block *atomic_nb, 2080 struct notifier_block *blocking_nb, 2081 bool tx_fwd_offload, 2082 struct netlink_ext_ack *extack) 2083 { 2084 return -EOPNOTSUPP; 2085 } 2086 2087 static inline void 2088 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2089 struct notifier_block *atomic_nb, 2090 struct notifier_block *blocking_nb) 2091 { 2092 } 2093 2094 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2095 { 2096 return false; 2097 } 2098 2099 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2100 { 2101 } 2102 2103 static inline void 2104 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2105 struct sk_buff *skb) 2106 { 2107 } 2108 2109 static inline void 2110 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2111 struct sk_buff *skb) 2112 { 2113 } 2114 2115 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2116 struct sk_buff *skb) 2117 { 2118 } 2119 2120 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2121 const struct sk_buff *skb) 2122 { 2123 return true; 2124 } 2125 2126 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2127 unsigned long flags, 2128 unsigned long mask, 2129 struct netlink_ext_ack *extack) 2130 { 2131 return 0; 2132 } 2133 2134 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2135 u16 flags, bool changed, 2136 struct netlink_ext_ack *extack) 2137 { 2138 return -EOPNOTSUPP; 2139 } 2140 2141 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2142 { 2143 return -EOPNOTSUPP; 2144 } 2145 2146 static inline void 2147 br_switchdev_fdb_notify(struct net_bridge *br, 2148 const struct net_bridge_fdb_entry *fdb, int type) 2149 { 2150 } 2151 2152 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2153 struct net_bridge_mdb_entry *mp, 2154 struct net_bridge_port_group *pg, 2155 int type) 2156 { 2157 } 2158 2159 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2160 { 2161 } 2162 2163 static inline void br_switchdev_init(struct net_bridge *br) 2164 { 2165 } 2166 2167 #endif /* CONFIG_NET_SWITCHDEV */ 2168 2169 /* br_arp_nd_proxy.c */ 2170 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2171 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2172 u16 vid, struct net_bridge_port *p); 2173 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2174 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2175 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2176 #endif 2177