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