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