1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 32 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 33 34 #define BR_HWDOM_MAX BITS_PER_LONG 35 36 #define BR_VERSION "2.3" 37 38 /* Control of forwarding link local multicast */ 39 #define BR_GROUPFWD_DEFAULT 0 40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 41 enum { 42 BR_GROUPFWD_STP = BIT(0), 43 BR_GROUPFWD_MACPAUSE = BIT(1), 44 BR_GROUPFWD_LACP = BIT(2), 45 }; 46 47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 48 BR_GROUPFWD_LACP) 49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 50 #define BR_GROUPFWD_8021AD 0xB801u 51 52 /* Path to usermode spanning tree program */ 53 #define BR_STP_PROG "/sbin/bridge-stp" 54 55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 56 57 typedef struct bridge_id bridge_id; 58 typedef struct mac_addr mac_addr; 59 typedef __u16 port_id; 60 61 struct bridge_id { 62 unsigned char prio[2]; 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 struct mac_addr { 67 unsigned char addr[ETH_ALEN]; 68 }; 69 70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 71 /* our own querier */ 72 struct bridge_mcast_own_query { 73 struct timer_list timer; 74 u32 startup_sent; 75 }; 76 77 /* other querier */ 78 struct bridge_mcast_other_query { 79 struct timer_list timer; 80 unsigned long delay_time; 81 }; 82 83 /* selected querier */ 84 struct bridge_mcast_querier { 85 struct br_ip addr; 86 int port_ifidx; 87 seqcount_spinlock_t seq; 88 }; 89 90 /* IGMP/MLD statistics */ 91 struct bridge_mcast_stats { 92 struct br_mcast_stats mstats; 93 struct u64_stats_sync syncp; 94 }; 95 96 struct br_mdb_src_entry { 97 struct br_ip addr; 98 }; 99 100 struct br_mdb_config { 101 struct net_bridge *br; 102 struct net_bridge_port *p; 103 struct br_mdb_entry *entry; 104 struct br_ip group; 105 bool src_entry; 106 u8 filter_mode; 107 u16 nlflags; 108 struct br_mdb_src_entry *src_entries; 109 int num_src_entries; 110 u8 rt_protocol; 111 }; 112 #endif 113 114 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 115 struct net_bridge_mcast_port { 116 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 117 struct net_bridge_port *port; 118 struct net_bridge_vlan *vlan; 119 120 struct bridge_mcast_own_query ip4_own_query; 121 struct timer_list ip4_mc_router_timer; 122 struct hlist_node ip4_rlist; 123 #if IS_ENABLED(CONFIG_IPV6) 124 struct bridge_mcast_own_query ip6_own_query; 125 struct timer_list ip6_mc_router_timer; 126 struct hlist_node ip6_rlist; 127 #endif /* IS_ENABLED(CONFIG_IPV6) */ 128 unsigned char multicast_router; 129 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 130 }; 131 132 /* net_bridge_mcast must be always defined due to forwarding stubs */ 133 struct net_bridge_mcast { 134 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 135 struct net_bridge *br; 136 struct net_bridge_vlan *vlan; 137 138 u32 multicast_last_member_count; 139 u32 multicast_startup_query_count; 140 141 u8 multicast_querier; 142 u8 multicast_igmp_version; 143 u8 multicast_router; 144 #if IS_ENABLED(CONFIG_IPV6) 145 u8 multicast_mld_version; 146 #endif 147 unsigned long multicast_last_member_interval; 148 unsigned long multicast_membership_interval; 149 unsigned long multicast_querier_interval; 150 unsigned long multicast_query_interval; 151 unsigned long multicast_query_response_interval; 152 unsigned long multicast_startup_query_interval; 153 struct hlist_head ip4_mc_router_list; 154 struct timer_list ip4_mc_router_timer; 155 struct bridge_mcast_other_query ip4_other_query; 156 struct bridge_mcast_own_query ip4_own_query; 157 struct bridge_mcast_querier ip4_querier; 158 #if IS_ENABLED(CONFIG_IPV6) 159 struct hlist_head ip6_mc_router_list; 160 struct timer_list ip6_mc_router_timer; 161 struct bridge_mcast_other_query ip6_other_query; 162 struct bridge_mcast_own_query ip6_own_query; 163 struct bridge_mcast_querier ip6_querier; 164 #endif /* IS_ENABLED(CONFIG_IPV6) */ 165 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 166 }; 167 168 struct br_tunnel_info { 169 __be64 tunnel_id; 170 struct metadata_dst __rcu *tunnel_dst; 171 }; 172 173 /* private vlan flags */ 174 enum { 175 BR_VLFLAG_PER_PORT_STATS = BIT(0), 176 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 177 BR_VLFLAG_MCAST_ENABLED = BIT(2), 178 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 179 }; 180 181 /** 182 * struct net_bridge_vlan - per-vlan entry 183 * 184 * @vnode: rhashtable member 185 * @vid: VLAN id 186 * @flags: bridge vlan flags 187 * @priv_flags: private (in-kernel) bridge vlan flags 188 * @state: STP state (e.g. blocking, learning, forwarding) 189 * @stats: per-cpu VLAN statistics 190 * @br: if MASTER flag set, this points to a bridge struct 191 * @port: if MASTER flag unset, this points to a port struct 192 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 193 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 194 * for this VLAN entry 195 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 196 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 197 * context 198 * @msti: if MASTER flag set, this holds the VLANs MST instance 199 * @vlist: sorted list of VLAN entries 200 * @rcu: used for entry destruction 201 * 202 * This structure is shared between the global per-VLAN entries contained in 203 * the bridge rhashtable and the local per-port per-VLAN entries contained in 204 * the port's rhashtable. The union entries should be interpreted depending on 205 * the entry flags that are set. 206 */ 207 struct net_bridge_vlan { 208 struct rhash_head vnode; 209 struct rhash_head tnode; 210 u16 vid; 211 u16 flags; 212 u16 priv_flags; 213 u8 state; 214 struct pcpu_sw_netstats __percpu *stats; 215 union { 216 struct net_bridge *br; 217 struct net_bridge_port *port; 218 }; 219 union { 220 refcount_t refcnt; 221 struct net_bridge_vlan *brvlan; 222 }; 223 224 struct br_tunnel_info tinfo; 225 226 union { 227 struct net_bridge_mcast br_mcast_ctx; 228 struct net_bridge_mcast_port port_mcast_ctx; 229 }; 230 231 u16 msti; 232 233 struct list_head vlist; 234 235 struct rcu_head rcu; 236 }; 237 238 /** 239 * struct net_bridge_vlan_group 240 * 241 * @vlan_hash: VLAN entry rhashtable 242 * @vlan_list: sorted VLAN entry list 243 * @num_vlans: number of total VLAN entries 244 * @pvid: PVID VLAN id 245 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 246 * 247 * IMPORTANT: Be careful when checking if there're VLAN entries using list 248 * primitives because the bridge can have entries in its list which 249 * are just for global context but not for filtering, i.e. they have 250 * the master flag set but not the brentry flag. If you have to check 251 * if there're "real" entries in the bridge please test @num_vlans 252 */ 253 struct net_bridge_vlan_group { 254 struct rhashtable vlan_hash; 255 struct rhashtable tunnel_hash; 256 struct list_head vlan_list; 257 u16 num_vlans; 258 u16 pvid; 259 u8 pvid_state; 260 }; 261 262 /* bridge fdb flags */ 263 enum { 264 BR_FDB_LOCAL, 265 BR_FDB_STATIC, 266 BR_FDB_STICKY, 267 BR_FDB_ADDED_BY_USER, 268 BR_FDB_ADDED_BY_EXT_LEARN, 269 BR_FDB_OFFLOADED, 270 BR_FDB_NOTIFY, 271 BR_FDB_NOTIFY_INACTIVE, 272 BR_FDB_LOCKED, 273 }; 274 275 struct net_bridge_fdb_key { 276 mac_addr addr; 277 u16 vlan_id; 278 }; 279 280 struct net_bridge_fdb_entry { 281 struct rhash_head rhnode; 282 struct net_bridge_port *dst; 283 284 struct net_bridge_fdb_key key; 285 struct hlist_node fdb_node; 286 unsigned long flags; 287 288 /* write-heavy members should not affect lookups */ 289 unsigned long updated ____cacheline_aligned_in_smp; 290 unsigned long used; 291 292 struct rcu_head rcu; 293 }; 294 295 struct net_bridge_fdb_flush_desc { 296 unsigned long flags; 297 unsigned long flags_mask; 298 int port_ifindex; 299 u16 vlan_id; 300 }; 301 302 #define MDB_PG_FLAGS_PERMANENT BIT(0) 303 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 304 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 305 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 306 #define MDB_PG_FLAGS_BLOCKED BIT(4) 307 308 #define PG_SRC_ENT_LIMIT 32 309 310 #define BR_SGRP_F_DELETE BIT(0) 311 #define BR_SGRP_F_SEND BIT(1) 312 #define BR_SGRP_F_INSTALLED BIT(2) 313 #define BR_SGRP_F_USER_ADDED BIT(3) 314 315 struct net_bridge_mcast_gc { 316 struct hlist_node gc_node; 317 void (*destroy)(struct net_bridge_mcast_gc *gc); 318 }; 319 320 struct net_bridge_group_src { 321 struct hlist_node node; 322 323 struct br_ip addr; 324 struct net_bridge_port_group *pg; 325 u8 flags; 326 u8 src_query_rexmit_cnt; 327 struct timer_list timer; 328 329 struct net_bridge *br; 330 struct net_bridge_mcast_gc mcast_gc; 331 struct rcu_head rcu; 332 }; 333 334 struct net_bridge_port_group_sg_key { 335 struct net_bridge_port *port; 336 struct br_ip addr; 337 }; 338 339 struct net_bridge_port_group { 340 struct net_bridge_port_group __rcu *next; 341 struct net_bridge_port_group_sg_key key; 342 unsigned char eth_addr[ETH_ALEN] __aligned(2); 343 unsigned char flags; 344 unsigned char filter_mode; 345 unsigned char grp_query_rexmit_cnt; 346 unsigned char rt_protocol; 347 348 struct hlist_head src_list; 349 unsigned int src_ents; 350 struct timer_list timer; 351 struct timer_list rexmit_timer; 352 struct hlist_node mglist; 353 struct rb_root eht_set_tree; 354 struct rb_root eht_host_tree; 355 356 struct rhash_head rhnode; 357 struct net_bridge_mcast_gc mcast_gc; 358 struct rcu_head rcu; 359 }; 360 361 struct net_bridge_mdb_entry { 362 struct rhash_head rhnode; 363 struct net_bridge *br; 364 struct net_bridge_port_group __rcu *ports; 365 struct br_ip addr; 366 bool host_joined; 367 368 struct timer_list timer; 369 struct hlist_node mdb_node; 370 371 struct net_bridge_mcast_gc mcast_gc; 372 struct rcu_head rcu; 373 }; 374 375 struct net_bridge_port { 376 struct net_bridge *br; 377 struct net_device *dev; 378 netdevice_tracker dev_tracker; 379 struct list_head list; 380 381 unsigned long flags; 382 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 383 struct net_bridge_vlan_group __rcu *vlgrp; 384 #endif 385 struct net_bridge_port __rcu *backup_port; 386 387 /* STP */ 388 u8 priority; 389 u8 state; 390 u16 port_no; 391 unsigned char topology_change_ack; 392 unsigned char config_pending; 393 port_id port_id; 394 port_id designated_port; 395 bridge_id designated_root; 396 bridge_id designated_bridge; 397 u32 path_cost; 398 u32 designated_cost; 399 unsigned long designated_age; 400 401 struct timer_list forward_delay_timer; 402 struct timer_list hold_timer; 403 struct timer_list message_age_timer; 404 struct kobject kobj; 405 struct rcu_head rcu; 406 407 struct net_bridge_mcast_port multicast_ctx; 408 409 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 410 struct bridge_mcast_stats __percpu *mcast_stats; 411 412 u32 multicast_eht_hosts_limit; 413 u32 multicast_eht_hosts_cnt; 414 struct hlist_head mglist; 415 #endif 416 417 #ifdef CONFIG_SYSFS 418 char sysfs_name[IFNAMSIZ]; 419 #endif 420 421 #ifdef CONFIG_NET_POLL_CONTROLLER 422 struct netpoll *np; 423 #endif 424 #ifdef CONFIG_NET_SWITCHDEV 425 /* Identifier used to group ports that share the same switchdev 426 * hardware domain. 427 */ 428 int hwdom; 429 int offload_count; 430 struct netdev_phys_item_id ppid; 431 #endif 432 u16 group_fwd_mask; 433 u16 backup_redirected_cnt; 434 435 struct bridge_stp_xstats stp_xstats; 436 }; 437 438 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 439 440 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 441 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 442 443 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 444 { 445 return rcu_dereference(dev->rx_handler_data); 446 } 447 448 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 449 { 450 return netif_is_bridge_port(dev) ? 451 rtnl_dereference(dev->rx_handler_data) : NULL; 452 } 453 454 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 455 { 456 return netif_is_bridge_port(dev) ? 457 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 458 } 459 460 enum net_bridge_opts { 461 BROPT_VLAN_ENABLED, 462 BROPT_VLAN_STATS_ENABLED, 463 BROPT_NF_CALL_IPTABLES, 464 BROPT_NF_CALL_IP6TABLES, 465 BROPT_NF_CALL_ARPTABLES, 466 BROPT_GROUP_ADDR_SET, 467 BROPT_MULTICAST_ENABLED, 468 BROPT_MULTICAST_QUERY_USE_IFADDR, 469 BROPT_MULTICAST_STATS_ENABLED, 470 BROPT_HAS_IPV6_ADDR, 471 BROPT_NEIGH_SUPPRESS_ENABLED, 472 BROPT_MTU_SET_BY_USER, 473 BROPT_VLAN_STATS_PER_PORT, 474 BROPT_NO_LL_LEARN, 475 BROPT_VLAN_BRIDGE_BINDING, 476 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 477 BROPT_MST_ENABLED, 478 }; 479 480 struct net_bridge { 481 spinlock_t lock; 482 spinlock_t hash_lock; 483 struct hlist_head frame_type_list; 484 struct net_device *dev; 485 unsigned long options; 486 /* These fields are accessed on each packet */ 487 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 488 __be16 vlan_proto; 489 u16 default_pvid; 490 struct net_bridge_vlan_group __rcu *vlgrp; 491 #endif 492 493 struct rhashtable fdb_hash_tbl; 494 struct list_head port_list; 495 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 496 union { 497 struct rtable fake_rtable; 498 struct rt6_info fake_rt6_info; 499 }; 500 #endif 501 u16 group_fwd_mask; 502 u16 group_fwd_mask_required; 503 504 /* STP */ 505 bridge_id designated_root; 506 bridge_id bridge_id; 507 unsigned char topology_change; 508 unsigned char topology_change_detected; 509 u16 root_port; 510 unsigned long max_age; 511 unsigned long hello_time; 512 unsigned long forward_delay; 513 unsigned long ageing_time; 514 unsigned long bridge_max_age; 515 unsigned long bridge_hello_time; 516 unsigned long bridge_forward_delay; 517 unsigned long bridge_ageing_time; 518 u32 root_path_cost; 519 520 u8 group_addr[ETH_ALEN]; 521 522 enum { 523 BR_NO_STP, /* no spanning tree */ 524 BR_KERNEL_STP, /* old STP in kernel */ 525 BR_USER_STP, /* new RSTP in userspace */ 526 } stp_enabled; 527 528 struct net_bridge_mcast multicast_ctx; 529 530 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 531 struct bridge_mcast_stats __percpu *mcast_stats; 532 533 u32 hash_max; 534 535 spinlock_t multicast_lock; 536 537 struct rhashtable mdb_hash_tbl; 538 struct rhashtable sg_port_tbl; 539 540 struct hlist_head mcast_gc_list; 541 struct hlist_head mdb_list; 542 543 struct work_struct mcast_gc_work; 544 #endif 545 546 struct timer_list hello_timer; 547 struct timer_list tcn_timer; 548 struct timer_list topology_change_timer; 549 struct delayed_work gc_work; 550 struct kobject *ifobj; 551 u32 auto_cnt; 552 553 #ifdef CONFIG_NET_SWITCHDEV 554 /* Counter used to make sure that hardware domains get unique 555 * identifiers in case a bridge spans multiple switchdev instances. 556 */ 557 int last_hwdom; 558 /* Bit mask of hardware domain numbers in use */ 559 unsigned long busy_hwdoms; 560 #endif 561 struct hlist_head fdb_list; 562 563 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 564 struct hlist_head mrp_list; 565 #endif 566 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 567 struct hlist_head mep_list; 568 #endif 569 }; 570 571 struct br_input_skb_cb { 572 struct net_device *brdev; 573 574 u16 frag_max_size; 575 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 576 u8 igmp; 577 u8 mrouters_only:1; 578 #endif 579 u8 proxyarp_replied:1; 580 u8 src_port_isolated:1; 581 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 582 u8 vlan_filtered:1; 583 #endif 584 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 585 u8 br_netfilter_broute:1; 586 #endif 587 588 #ifdef CONFIG_NET_SWITCHDEV 589 /* Set if TX data plane offloading is used towards at least one 590 * hardware domain. 591 */ 592 u8 tx_fwd_offload:1; 593 /* The switchdev hardware domain from which this packet was received. 594 * If skb->offload_fwd_mark was set, then this packet was already 595 * forwarded by hardware to the other ports in the source hardware 596 * domain, otherwise it wasn't. 597 */ 598 int src_hwdom; 599 /* Bit mask of hardware domains towards this packet has already been 600 * transmitted using the TX data plane offload. 601 */ 602 unsigned long fwd_hwdoms; 603 #endif 604 }; 605 606 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 607 608 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 609 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 610 #else 611 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 612 #endif 613 614 #define br_printk(level, br, format, args...) \ 615 printk(level "%s: " format, (br)->dev->name, ##args) 616 617 #define br_err(__br, format, args...) \ 618 br_printk(KERN_ERR, __br, format, ##args) 619 #define br_warn(__br, format, args...) \ 620 br_printk(KERN_WARNING, __br, format, ##args) 621 #define br_notice(__br, format, args...) \ 622 br_printk(KERN_NOTICE, __br, format, ##args) 623 #define br_info(__br, format, args...) \ 624 br_printk(KERN_INFO, __br, format, ##args) 625 626 #define br_debug(br, format, args...) \ 627 pr_debug("%s: " format, (br)->dev->name, ##args) 628 629 /* called under bridge lock */ 630 static inline int br_is_root_bridge(const struct net_bridge *br) 631 { 632 return !memcmp(&br->bridge_id, &br->designated_root, 8); 633 } 634 635 /* check if a VLAN entry is global */ 636 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 637 { 638 return v->flags & BRIDGE_VLAN_INFO_MASTER; 639 } 640 641 /* check if a VLAN entry is used by the bridge */ 642 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 643 { 644 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 645 } 646 647 /* check if we should use the vlan entry, returns false if it's only context */ 648 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 649 { 650 if (br_vlan_is_master(v)) { 651 if (br_vlan_is_brentry(v)) 652 return true; 653 else 654 return false; 655 } 656 657 return true; 658 } 659 660 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 661 { 662 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 663 } 664 665 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 666 { 667 bool ret = vid > 0 && vid < VLAN_VID_MASK; 668 669 if (!ret) 670 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 671 672 return ret; 673 } 674 675 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 676 const struct bridge_vlan_info *last, 677 struct netlink_ext_ack *extack) 678 { 679 /* pvid flag is not allowed in ranges */ 680 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 681 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 682 return false; 683 } 684 685 /* when cur is the range end, check if: 686 * - it has range start flag 687 * - range ids are invalid (end is equal to or before start) 688 */ 689 if (last) { 690 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 691 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 692 return false; 693 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 694 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 695 return false; 696 } else if (cur->vid <= last->vid) { 697 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 698 return false; 699 } 700 } 701 702 /* check for required range flags */ 703 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 704 BRIDGE_VLAN_INFO_RANGE_END))) { 705 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 706 return false; 707 } 708 709 return true; 710 } 711 712 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 713 { 714 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 715 716 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 717 if (!br_vlan_is_master(v)) 718 mcast_router = v->port_mcast_ctx.multicast_router; 719 else 720 mcast_router = v->br_mcast_ctx.multicast_router; 721 #endif 722 723 return mcast_router; 724 } 725 726 static inline int br_afspec_cmd_to_rtm(int cmd) 727 { 728 switch (cmd) { 729 case RTM_SETLINK: 730 return RTM_NEWVLAN; 731 case RTM_DELLINK: 732 return RTM_DELVLAN; 733 } 734 735 return 0; 736 } 737 738 static inline int br_opt_get(const struct net_bridge *br, 739 enum net_bridge_opts opt) 740 { 741 return test_bit(opt, &br->options); 742 } 743 744 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 745 struct netlink_ext_ack *extack); 746 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 747 int br_boolopt_multi_toggle(struct net_bridge *br, 748 struct br_boolopt_multi *bm, 749 struct netlink_ext_ack *extack); 750 void br_boolopt_multi_get(const struct net_bridge *br, 751 struct br_boolopt_multi *bm); 752 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 753 754 /* br_device.c */ 755 void br_dev_setup(struct net_device *dev); 756 void br_dev_delete(struct net_device *dev, struct list_head *list); 757 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 758 #ifdef CONFIG_NET_POLL_CONTROLLER 759 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 760 struct sk_buff *skb) 761 { 762 netpoll_send_skb(p->np, skb); 763 } 764 765 int br_netpoll_enable(struct net_bridge_port *p); 766 void br_netpoll_disable(struct net_bridge_port *p); 767 #else 768 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 769 struct sk_buff *skb) 770 { 771 } 772 773 static inline int br_netpoll_enable(struct net_bridge_port *p) 774 { 775 return 0; 776 } 777 778 static inline void br_netpoll_disable(struct net_bridge_port *p) 779 { 780 } 781 #endif 782 783 /* br_fdb.c */ 784 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 785 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 786 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 787 NTF_STICKY | NTF_OFFLOADED) 788 789 int br_fdb_init(void); 790 void br_fdb_fini(void); 791 int br_fdb_hash_init(struct net_bridge *br); 792 void br_fdb_hash_fini(struct net_bridge *br); 793 void br_fdb_flush(struct net_bridge *br, 794 const struct net_bridge_fdb_flush_desc *desc); 795 void br_fdb_find_delete_local(struct net_bridge *br, 796 const struct net_bridge_port *p, 797 const unsigned char *addr, u16 vid); 798 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 799 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 800 void br_fdb_cleanup(struct work_struct *work); 801 void br_fdb_delete_by_port(struct net_bridge *br, 802 const struct net_bridge_port *p, u16 vid, int do_all); 803 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 804 const unsigned char *addr, 805 __u16 vid); 806 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 807 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 808 unsigned long off); 809 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 810 const unsigned char *addr, u16 vid); 811 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 812 const unsigned char *addr, u16 vid, unsigned long flags); 813 814 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 815 struct net_device *dev, const unsigned char *addr, u16 vid, 816 struct netlink_ext_ack *extack); 817 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], 818 struct net_device *dev, u16 vid, 819 struct netlink_ext_ack *extack); 820 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 821 const unsigned char *addr, u16 vid, u16 nlh_flags, 822 struct netlink_ext_ack *extack); 823 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 824 struct net_device *dev, struct net_device *fdev, int *idx); 825 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 826 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 827 struct netlink_ext_ack *extack); 828 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 829 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 830 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 831 const unsigned char *addr, u16 vid, 832 bool locked, bool swdev_notify); 833 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 834 const unsigned char *addr, u16 vid, 835 bool swdev_notify); 836 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 837 const unsigned char *addr, u16 vid, bool offloaded); 838 839 /* br_forward.c */ 840 enum br_pkt_type { 841 BR_PKT_UNICAST, 842 BR_PKT_MULTICAST, 843 BR_PKT_BROADCAST 844 }; 845 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 846 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 847 bool local_rcv, bool local_orig); 848 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 849 void br_flood(struct net_bridge *br, struct sk_buff *skb, 850 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 851 852 /* return true if both source port and dest port are isolated */ 853 static inline bool br_skb_isolated(const struct net_bridge_port *to, 854 const struct sk_buff *skb) 855 { 856 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 857 (to->flags & BR_ISOLATED); 858 } 859 860 /* br_if.c */ 861 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 862 int br_add_bridge(struct net *net, const char *name); 863 int br_del_bridge(struct net *net, const char *name); 864 int br_add_if(struct net_bridge *br, struct net_device *dev, 865 struct netlink_ext_ack *extack); 866 int br_del_if(struct net_bridge *br, struct net_device *dev); 867 void br_mtu_auto_adjust(struct net_bridge *br); 868 netdev_features_t br_features_recompute(struct net_bridge *br, 869 netdev_features_t features); 870 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 871 void br_manage_promisc(struct net_bridge *br); 872 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 873 874 /* br_input.c */ 875 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 876 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 877 878 struct br_frame_type { 879 __be16 type; 880 int (*frame_handler)(struct net_bridge_port *port, 881 struct sk_buff *skb); 882 struct hlist_node list; 883 }; 884 885 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 886 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 887 888 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 889 { 890 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 891 } 892 893 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 894 { 895 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 896 } 897 898 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 899 { 900 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 901 } 902 903 static inline struct net_bridge_port * 904 br_port_get_check_rtnl(const struct net_device *dev) 905 { 906 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 907 } 908 909 /* br_ioctl.c */ 910 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 911 void __user *data, int cmd); 912 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 913 struct ifreq *ifr, void __user *uarg); 914 915 /* br_multicast.c */ 916 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 917 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 918 struct net_bridge_mcast_port **pmctx, 919 struct net_bridge_vlan *vlan, 920 struct sk_buff *skb, u16 vid); 921 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 922 struct sk_buff *skb, u16 vid); 923 int br_multicast_add_port(struct net_bridge_port *port); 924 void br_multicast_del_port(struct net_bridge_port *port); 925 void br_multicast_enable_port(struct net_bridge_port *port); 926 void br_multicast_disable_port(struct net_bridge_port *port); 927 void br_multicast_init(struct net_bridge *br); 928 void br_multicast_join_snoopers(struct net_bridge *br); 929 void br_multicast_leave_snoopers(struct net_bridge *br); 930 void br_multicast_open(struct net_bridge *br); 931 void br_multicast_stop(struct net_bridge *br); 932 void br_multicast_dev_del(struct net_bridge *br); 933 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 934 struct net_bridge_mcast *brmctx, 935 bool local_rcv, bool local_orig); 936 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 937 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 938 unsigned long val); 939 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 940 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 941 struct netlink_ext_ack *extack); 942 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 943 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 944 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 945 unsigned long val); 946 #if IS_ENABLED(CONFIG_IPV6) 947 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 948 unsigned long val); 949 #endif 950 struct net_bridge_mdb_entry * 951 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 952 struct net_bridge_mdb_entry * 953 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 954 struct net_bridge_port_group * 955 br_multicast_new_port_group(struct net_bridge_port *port, 956 const struct br_ip *group, 957 struct net_bridge_port_group __rcu *next, 958 unsigned char flags, const unsigned char *src, 959 u8 filter_mode, u8 rt_protocol, 960 struct netlink_ext_ack *extack); 961 void br_multicast_del_port_group(struct net_bridge_port_group *p); 962 int br_mdb_hash_init(struct net_bridge *br); 963 void br_mdb_hash_fini(struct net_bridge *br); 964 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 965 struct net_bridge_port_group *pg, int type); 966 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 967 int type); 968 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 969 struct net_bridge_port_group *pg, 970 struct net_bridge_port_group __rcu **pp); 971 void br_multicast_count(struct net_bridge *br, 972 const struct net_bridge_port *p, 973 const struct sk_buff *skb, u8 type, u8 dir); 974 int br_multicast_init_stats(struct net_bridge *br); 975 void br_multicast_uninit_stats(struct net_bridge *br); 976 void br_multicast_get_stats(const struct net_bridge *br, 977 const struct net_bridge_port *p, 978 struct br_mcast_stats *dest); 979 void br_mdb_init(void); 980 void br_mdb_uninit(void); 981 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 982 struct net_bridge_mdb_entry *mp, bool notify); 983 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 984 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 985 u8 filter_mode); 986 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 987 struct net_bridge_port_group *sg); 988 struct net_bridge_group_src * 989 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 990 struct net_bridge_group_src * 991 br_multicast_new_group_src(struct net_bridge_port_group *pg, 992 struct br_ip *src_ip); 993 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 994 void br_multicast_del_group_src(struct net_bridge_group_src *src, 995 bool fastleave); 996 void br_multicast_ctx_init(struct net_bridge *br, 997 struct net_bridge_vlan *vlan, 998 struct net_bridge_mcast *brmctx); 999 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1000 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1001 struct net_bridge_vlan *vlan, 1002 struct net_bridge_mcast_port *pmctx); 1003 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1004 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1005 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1006 struct netlink_ext_ack *extack); 1007 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1008 1009 int br_rports_fill_info(struct sk_buff *skb, 1010 const struct net_bridge_mcast *brmctx); 1011 int br_multicast_dump_querier_state(struct sk_buff *skb, 1012 const struct net_bridge_mcast *brmctx, 1013 int nest_attr); 1014 size_t br_multicast_querier_state_size(void); 1015 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1016 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1017 unsigned long val); 1018 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1019 unsigned long val); 1020 1021 static inline bool br_group_is_l2(const struct br_ip *group) 1022 { 1023 return group->proto == 0; 1024 } 1025 1026 #define mlock_dereference(X, br) \ 1027 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1028 1029 static inline struct hlist_node * 1030 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1031 struct sk_buff *skb) 1032 { 1033 #if IS_ENABLED(CONFIG_IPV6) 1034 if (skb->protocol == htons(ETH_P_IPV6)) 1035 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1036 #endif 1037 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1038 } 1039 1040 static inline struct net_bridge_port * 1041 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1042 { 1043 struct net_bridge_mcast_port *mctx; 1044 1045 #if IS_ENABLED(CONFIG_IPV6) 1046 if (skb->protocol == htons(ETH_P_IPV6)) 1047 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1048 ip6_rlist); 1049 else 1050 #endif 1051 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1052 ip4_rlist); 1053 1054 if (mctx) 1055 return mctx->port; 1056 else 1057 return NULL; 1058 } 1059 1060 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1061 { 1062 return timer_pending(&brmctx->ip4_mc_router_timer); 1063 } 1064 1065 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1066 { 1067 #if IS_ENABLED(CONFIG_IPV6) 1068 return timer_pending(&brmctx->ip6_mc_router_timer); 1069 #else 1070 return false; 1071 #endif 1072 } 1073 1074 static inline bool 1075 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1076 { 1077 switch (brmctx->multicast_router) { 1078 case MDB_RTR_TYPE_PERM: 1079 return true; 1080 case MDB_RTR_TYPE_TEMP_QUERY: 1081 if (skb) { 1082 if (skb->protocol == htons(ETH_P_IP)) 1083 return br_ip4_multicast_is_router(brmctx); 1084 else if (skb->protocol == htons(ETH_P_IPV6)) 1085 return br_ip6_multicast_is_router(brmctx); 1086 } else { 1087 return br_ip4_multicast_is_router(brmctx) || 1088 br_ip6_multicast_is_router(brmctx); 1089 } 1090 fallthrough; 1091 default: 1092 return false; 1093 } 1094 } 1095 1096 static inline bool 1097 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1098 struct bridge_mcast_other_query *querier, 1099 const bool is_ipv6) 1100 { 1101 bool own_querier_enabled; 1102 1103 if (brmctx->multicast_querier) { 1104 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1105 own_querier_enabled = false; 1106 else 1107 own_querier_enabled = true; 1108 } else { 1109 own_querier_enabled = false; 1110 } 1111 1112 return time_is_before_jiffies(querier->delay_time) && 1113 (own_querier_enabled || timer_pending(&querier->timer)); 1114 } 1115 1116 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1117 struct ethhdr *eth, 1118 const struct net_bridge_mdb_entry *mdb) 1119 { 1120 switch (eth->h_proto) { 1121 case (htons(ETH_P_IP)): 1122 return __br_multicast_querier_exists(brmctx, 1123 &brmctx->ip4_other_query, false); 1124 #if IS_ENABLED(CONFIG_IPV6) 1125 case (htons(ETH_P_IPV6)): 1126 return __br_multicast_querier_exists(brmctx, 1127 &brmctx->ip6_other_query, true); 1128 #endif 1129 default: 1130 return !!mdb && br_group_is_l2(&mdb->addr); 1131 } 1132 } 1133 1134 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1135 { 1136 switch (ip->proto) { 1137 case htons(ETH_P_IP): 1138 return ipv4_is_zeronet(ip->src.ip4); 1139 #if IS_ENABLED(CONFIG_IPV6) 1140 case htons(ETH_P_IPV6): 1141 return ipv6_addr_any(&ip->src.ip6); 1142 #endif 1143 default: 1144 return false; 1145 } 1146 } 1147 1148 static inline bool 1149 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1150 __be16 proto) 1151 { 1152 switch (proto) { 1153 case htons(ETH_P_IP): 1154 return !!(brmctx->multicast_igmp_version == 3); 1155 #if IS_ENABLED(CONFIG_IPV6) 1156 case htons(ETH_P_IPV6): 1157 return !!(brmctx->multicast_mld_version == 2); 1158 #endif 1159 default: 1160 return false; 1161 } 1162 } 1163 1164 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1165 { 1166 return BR_INPUT_SKB_CB(skb)->igmp; 1167 } 1168 1169 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1170 { 1171 return brmctx->multicast_last_member_interval * 1172 brmctx->multicast_last_member_count; 1173 } 1174 1175 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1176 { 1177 return brmctx->multicast_membership_interval; 1178 } 1179 1180 static inline bool 1181 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1182 { 1183 return !!brmctx->vlan; 1184 } 1185 1186 static inline bool 1187 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1188 { 1189 return !!pmctx->vlan; 1190 } 1191 1192 static inline struct net_bridge_mcast * 1193 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1194 { 1195 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1196 return &pmctx->port->br->multicast_ctx; 1197 else 1198 return &pmctx->vlan->brvlan->br_mcast_ctx; 1199 } 1200 1201 static inline bool 1202 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1203 { 1204 return br_multicast_ctx_is_vlan(brmctx) && 1205 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1206 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1207 } 1208 1209 static inline bool 1210 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1211 { 1212 return br_multicast_ctx_is_vlan(brmctx) && 1213 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1214 } 1215 1216 static inline bool 1217 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1218 { 1219 return br_multicast_port_ctx_is_vlan(pmctx) && 1220 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1221 } 1222 1223 static inline bool 1224 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1225 { 1226 return pmctx->port->state == BR_STATE_DISABLED || 1227 (br_multicast_port_ctx_is_vlan(pmctx) && 1228 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1229 pmctx->vlan->state == BR_STATE_DISABLED)); 1230 } 1231 1232 static inline bool 1233 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1234 { 1235 return br_multicast_port_ctx_state_disabled(pmctx) || 1236 pmctx->port->state == BR_STATE_BLOCKING || 1237 (br_multicast_port_ctx_is_vlan(pmctx) && 1238 pmctx->vlan->state == BR_STATE_BLOCKING); 1239 } 1240 1241 static inline bool 1242 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1243 { 1244 #if IS_ENABLED(CONFIG_IPV6) 1245 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1246 !hlist_empty(&brmctx->ip6_mc_router_list); 1247 #else 1248 return !hlist_empty(&brmctx->ip4_mc_router_list); 1249 #endif 1250 } 1251 1252 static inline bool 1253 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1254 const struct net_bridge_mcast *brmctx2) 1255 { 1256 return brmctx1->multicast_igmp_version == 1257 brmctx2->multicast_igmp_version && 1258 brmctx1->multicast_last_member_count == 1259 brmctx2->multicast_last_member_count && 1260 brmctx1->multicast_startup_query_count == 1261 brmctx2->multicast_startup_query_count && 1262 brmctx1->multicast_last_member_interval == 1263 brmctx2->multicast_last_member_interval && 1264 brmctx1->multicast_membership_interval == 1265 brmctx2->multicast_membership_interval && 1266 brmctx1->multicast_querier_interval == 1267 brmctx2->multicast_querier_interval && 1268 brmctx1->multicast_query_interval == 1269 brmctx2->multicast_query_interval && 1270 brmctx1->multicast_query_response_interval == 1271 brmctx2->multicast_query_response_interval && 1272 brmctx1->multicast_startup_query_interval == 1273 brmctx2->multicast_startup_query_interval && 1274 brmctx1->multicast_querier == brmctx2->multicast_querier && 1275 brmctx1->multicast_router == brmctx2->multicast_router && 1276 !br_rports_have_mc_router(brmctx1) && 1277 !br_rports_have_mc_router(brmctx2) && 1278 #if IS_ENABLED(CONFIG_IPV6) 1279 brmctx1->multicast_mld_version == 1280 brmctx2->multicast_mld_version && 1281 #endif 1282 true; 1283 } 1284 1285 static inline bool 1286 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1287 { 1288 bool vlan_snooping_enabled; 1289 1290 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1291 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1292 1293 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1294 } 1295 #else 1296 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1297 struct net_bridge_mcast_port **pmctx, 1298 struct net_bridge_vlan *vlan, 1299 struct sk_buff *skb, 1300 u16 vid) 1301 { 1302 return 0; 1303 } 1304 1305 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1306 struct sk_buff *skb, u16 vid) 1307 { 1308 return NULL; 1309 } 1310 1311 static inline int br_multicast_add_port(struct net_bridge_port *port) 1312 { 1313 return 0; 1314 } 1315 1316 static inline void br_multicast_del_port(struct net_bridge_port *port) 1317 { 1318 } 1319 1320 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1321 { 1322 } 1323 1324 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1325 { 1326 } 1327 1328 static inline void br_multicast_init(struct net_bridge *br) 1329 { 1330 } 1331 1332 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1333 { 1334 } 1335 1336 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1337 { 1338 } 1339 1340 static inline void br_multicast_open(struct net_bridge *br) 1341 { 1342 } 1343 1344 static inline void br_multicast_stop(struct net_bridge *br) 1345 { 1346 } 1347 1348 static inline void br_multicast_dev_del(struct net_bridge *br) 1349 { 1350 } 1351 1352 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1353 struct sk_buff *skb, 1354 struct net_bridge_mcast *brmctx, 1355 bool local_rcv, bool local_orig) 1356 { 1357 } 1358 1359 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1360 struct sk_buff *skb) 1361 { 1362 return false; 1363 } 1364 1365 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1366 struct ethhdr *eth, 1367 const struct net_bridge_mdb_entry *mdb) 1368 { 1369 return false; 1370 } 1371 1372 static inline void br_mdb_init(void) 1373 { 1374 } 1375 1376 static inline void br_mdb_uninit(void) 1377 { 1378 } 1379 1380 static inline int br_mdb_hash_init(struct net_bridge *br) 1381 { 1382 return 0; 1383 } 1384 1385 static inline void br_mdb_hash_fini(struct net_bridge *br) 1386 { 1387 } 1388 1389 static inline void br_multicast_count(struct net_bridge *br, 1390 const struct net_bridge_port *p, 1391 const struct sk_buff *skb, 1392 u8 type, u8 dir) 1393 { 1394 } 1395 1396 static inline int br_multicast_init_stats(struct net_bridge *br) 1397 { 1398 return 0; 1399 } 1400 1401 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1402 { 1403 } 1404 1405 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1406 { 1407 return 0; 1408 } 1409 1410 static inline void br_multicast_ctx_init(struct net_bridge *br, 1411 struct net_bridge_vlan *vlan, 1412 struct net_bridge_mcast *brmctx) 1413 { 1414 } 1415 1416 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1417 { 1418 } 1419 1420 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1421 struct net_bridge_vlan *vlan, 1422 struct net_bridge_mcast_port *pmctx) 1423 { 1424 } 1425 1426 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1427 { 1428 } 1429 1430 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1431 bool on) 1432 { 1433 } 1434 1435 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1436 bool on, 1437 struct netlink_ext_ack *extack) 1438 { 1439 return -EOPNOTSUPP; 1440 } 1441 1442 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1443 bool on) 1444 { 1445 return false; 1446 } 1447 1448 static inline bool 1449 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1450 const struct net_bridge_mcast *brmctx2) 1451 { 1452 return true; 1453 } 1454 #endif 1455 1456 /* br_vlan.c */ 1457 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1458 bool br_allowed_ingress(const struct net_bridge *br, 1459 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1460 u16 *vid, u8 *state, 1461 struct net_bridge_vlan **vlan); 1462 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1463 const struct sk_buff *skb); 1464 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1465 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1466 const struct net_bridge_port *port, 1467 struct net_bridge_vlan_group *vg, 1468 struct sk_buff *skb); 1469 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1470 bool *changed, struct netlink_ext_ack *extack); 1471 int br_vlan_delete(struct net_bridge *br, u16 vid); 1472 void br_vlan_flush(struct net_bridge *br); 1473 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1474 void br_recalculate_fwd_mask(struct net_bridge *br); 1475 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1476 struct netlink_ext_ack *extack); 1477 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1478 struct netlink_ext_ack *extack); 1479 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1480 struct netlink_ext_ack *extack); 1481 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1482 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1483 int br_vlan_init(struct net_bridge *br); 1484 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1485 struct netlink_ext_ack *extack); 1486 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1487 struct netlink_ext_ack *extack); 1488 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1489 bool *changed, struct netlink_ext_ack *extack); 1490 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1491 void nbp_vlan_flush(struct net_bridge_port *port); 1492 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1493 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1494 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1495 struct pcpu_sw_netstats *stats); 1496 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1497 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1498 void *ptr); 1499 void br_vlan_rtnl_init(void); 1500 void br_vlan_rtnl_uninit(void); 1501 void br_vlan_notify(const struct net_bridge *br, 1502 const struct net_bridge_port *p, 1503 u16 vid, u16 vid_range, 1504 int cmd); 1505 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1506 const struct net_bridge_vlan *range_end); 1507 1508 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1509 struct net_device_path_ctx *ctx, 1510 struct net_device_path *path); 1511 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1512 struct net_bridge_port *dst, 1513 struct net_device_path *path); 1514 1515 static inline struct net_bridge_vlan_group *br_vlan_group( 1516 const struct net_bridge *br) 1517 { 1518 return rtnl_dereference(br->vlgrp); 1519 } 1520 1521 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1522 const struct net_bridge_port *p) 1523 { 1524 return rtnl_dereference(p->vlgrp); 1525 } 1526 1527 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1528 const struct net_bridge *br) 1529 { 1530 return rcu_dereference(br->vlgrp); 1531 } 1532 1533 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1534 const struct net_bridge_port *p) 1535 { 1536 return rcu_dereference(p->vlgrp); 1537 } 1538 1539 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1540 * skb, the vlan tag will always be present if the frame was tagged. 1541 */ 1542 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1543 { 1544 int err = 0; 1545 1546 if (skb_vlan_tag_present(skb)) { 1547 *vid = skb_vlan_tag_get_id(skb); 1548 } else { 1549 *vid = 0; 1550 err = -EINVAL; 1551 } 1552 1553 return err; 1554 } 1555 1556 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1557 { 1558 if (!vg) 1559 return 0; 1560 1561 smp_rmb(); 1562 return vg->pvid; 1563 } 1564 1565 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1566 { 1567 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1568 } 1569 #else 1570 static inline bool br_allowed_ingress(const struct net_bridge *br, 1571 struct net_bridge_vlan_group *vg, 1572 struct sk_buff *skb, 1573 u16 *vid, u8 *state, 1574 struct net_bridge_vlan **vlan) 1575 1576 { 1577 *vlan = NULL; 1578 return true; 1579 } 1580 1581 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1582 const struct sk_buff *skb) 1583 { 1584 return true; 1585 } 1586 1587 static inline bool br_should_learn(struct net_bridge_port *p, 1588 struct sk_buff *skb, u16 *vid) 1589 { 1590 return true; 1591 } 1592 1593 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1594 const struct net_bridge_port *port, 1595 struct net_bridge_vlan_group *vg, 1596 struct sk_buff *skb) 1597 { 1598 return skb; 1599 } 1600 1601 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1602 bool *changed, struct netlink_ext_ack *extack) 1603 { 1604 *changed = false; 1605 return -EOPNOTSUPP; 1606 } 1607 1608 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1609 { 1610 return -EOPNOTSUPP; 1611 } 1612 1613 static inline void br_vlan_flush(struct net_bridge *br) 1614 { 1615 } 1616 1617 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1618 { 1619 } 1620 1621 static inline int br_vlan_init(struct net_bridge *br) 1622 { 1623 return 0; 1624 } 1625 1626 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1627 bool *changed, struct netlink_ext_ack *extack) 1628 { 1629 *changed = false; 1630 return -EOPNOTSUPP; 1631 } 1632 1633 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1634 { 1635 return -EOPNOTSUPP; 1636 } 1637 1638 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1639 { 1640 } 1641 1642 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1643 u16 vid) 1644 { 1645 return NULL; 1646 } 1647 1648 static inline int nbp_vlan_init(struct net_bridge_port *port, 1649 struct netlink_ext_ack *extack) 1650 { 1651 return 0; 1652 } 1653 1654 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1655 { 1656 return 0; 1657 } 1658 1659 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1660 { 1661 return 0; 1662 } 1663 1664 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1665 unsigned long val, 1666 struct netlink_ext_ack *extack) 1667 { 1668 return -EOPNOTSUPP; 1669 } 1670 1671 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1672 u32 filter_mask) 1673 { 1674 return 0; 1675 } 1676 1677 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1678 struct net_device_path_ctx *ctx, 1679 struct net_device_path *path) 1680 { 1681 } 1682 1683 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1684 struct net_bridge_port *dst, 1685 struct net_device_path *path) 1686 { 1687 return 0; 1688 } 1689 1690 static inline struct net_bridge_vlan_group *br_vlan_group( 1691 const struct net_bridge *br) 1692 { 1693 return NULL; 1694 } 1695 1696 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1697 const struct net_bridge_port *p) 1698 { 1699 return NULL; 1700 } 1701 1702 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1703 const struct net_bridge *br) 1704 { 1705 return NULL; 1706 } 1707 1708 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1709 const struct net_bridge_port *p) 1710 { 1711 return NULL; 1712 } 1713 1714 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1715 struct pcpu_sw_netstats *stats) 1716 { 1717 } 1718 1719 static inline void br_vlan_port_event(struct net_bridge_port *p, 1720 unsigned long event) 1721 { 1722 } 1723 1724 static inline int br_vlan_bridge_event(struct net_device *dev, 1725 unsigned long event, void *ptr) 1726 { 1727 return 0; 1728 } 1729 1730 static inline void br_vlan_rtnl_init(void) 1731 { 1732 } 1733 1734 static inline void br_vlan_rtnl_uninit(void) 1735 { 1736 } 1737 1738 static inline void br_vlan_notify(const struct net_bridge *br, 1739 const struct net_bridge_port *p, 1740 u16 vid, u16 vid_range, 1741 int cmd) 1742 { 1743 } 1744 1745 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1746 const struct net_bridge_vlan *range_end) 1747 { 1748 return true; 1749 } 1750 1751 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1752 { 1753 return 0; 1754 } 1755 1756 #endif 1757 1758 /* br_vlan_options.c */ 1759 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1760 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1761 const struct net_bridge_vlan *range_end); 1762 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1763 size_t br_vlan_opts_nl_size(void); 1764 int br_vlan_process_options(const struct net_bridge *br, 1765 const struct net_bridge_port *p, 1766 struct net_bridge_vlan *range_start, 1767 struct net_bridge_vlan *range_end, 1768 struct nlattr **tb, 1769 struct netlink_ext_ack *extack); 1770 int br_vlan_rtm_process_global_options(struct net_device *dev, 1771 const struct nlattr *attr, 1772 int cmd, 1773 struct netlink_ext_ack *extack); 1774 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1775 const struct net_bridge_vlan *r_end); 1776 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1777 const struct net_bridge_vlan *v_opts); 1778 1779 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1780 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1781 { 1782 return READ_ONCE(v->state); 1783 } 1784 1785 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1786 { 1787 WRITE_ONCE(v->state, state); 1788 } 1789 1790 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1791 { 1792 return READ_ONCE(vg->pvid_state); 1793 } 1794 1795 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1796 u8 state) 1797 { 1798 WRITE_ONCE(vg->pvid_state, state); 1799 } 1800 1801 /* learn_allow is true at ingress and false at egress */ 1802 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1803 { 1804 switch (state) { 1805 case BR_STATE_LEARNING: 1806 return learn_allow; 1807 case BR_STATE_FORWARDING: 1808 return true; 1809 default: 1810 return false; 1811 } 1812 } 1813 #endif 1814 1815 /* br_mst.c */ 1816 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1817 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1818 static inline bool br_mst_is_enabled(struct net_bridge *br) 1819 { 1820 return static_branch_unlikely(&br_mst_used) && 1821 br_opt_get(br, BROPT_MST_ENABLED); 1822 } 1823 1824 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1825 struct netlink_ext_ack *extack); 1826 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1827 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1828 int br_mst_set_enabled(struct net_bridge *br, bool on, 1829 struct netlink_ext_ack *extack); 1830 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1831 int br_mst_fill_info(struct sk_buff *skb, 1832 const struct net_bridge_vlan_group *vg); 1833 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1834 struct netlink_ext_ack *extack); 1835 #else 1836 static inline bool br_mst_is_enabled(struct net_bridge *br) 1837 { 1838 return false; 1839 } 1840 1841 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1842 u8 state, struct netlink_ext_ack *extack) 1843 { 1844 return -EOPNOTSUPP; 1845 } 1846 1847 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1848 struct netlink_ext_ack *extack) 1849 { 1850 return -EOPNOTSUPP; 1851 } 1852 1853 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1854 { 1855 return 0; 1856 } 1857 1858 static inline int br_mst_fill_info(struct sk_buff *skb, 1859 const struct net_bridge_vlan_group *vg) 1860 { 1861 return -EOPNOTSUPP; 1862 } 1863 1864 static inline int br_mst_process(struct net_bridge_port *p, 1865 const struct nlattr *mst_attr, 1866 struct netlink_ext_ack *extack) 1867 { 1868 return -EOPNOTSUPP; 1869 } 1870 #endif 1871 1872 struct nf_br_ops { 1873 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1874 }; 1875 extern const struct nf_br_ops __rcu *nf_br_ops; 1876 1877 /* br_netfilter.c */ 1878 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1879 int br_nf_core_init(void); 1880 void br_nf_core_fini(void); 1881 void br_netfilter_rtable_init(struct net_bridge *); 1882 #else 1883 static inline int br_nf_core_init(void) { return 0; } 1884 static inline void br_nf_core_fini(void) {} 1885 #define br_netfilter_rtable_init(x) 1886 #endif 1887 1888 /* br_stp.c */ 1889 void br_set_state(struct net_bridge_port *p, unsigned int state); 1890 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1891 void br_init_port(struct net_bridge_port *p); 1892 void br_become_designated_port(struct net_bridge_port *p); 1893 1894 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1895 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1896 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1897 int br_set_max_age(struct net_bridge *br, unsigned long x); 1898 int __set_ageing_time(struct net_device *dev, unsigned long t); 1899 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1900 1901 1902 /* br_stp_if.c */ 1903 void br_stp_enable_bridge(struct net_bridge *br); 1904 void br_stp_disable_bridge(struct net_bridge *br); 1905 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1906 struct netlink_ext_ack *extack); 1907 void br_stp_enable_port(struct net_bridge_port *p); 1908 void br_stp_disable_port(struct net_bridge_port *p); 1909 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1910 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1911 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1912 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1913 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1914 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1915 1916 /* br_stp_bpdu.c */ 1917 struct stp_proto; 1918 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1919 struct net_device *dev); 1920 1921 /* br_stp_timer.c */ 1922 void br_stp_timer_init(struct net_bridge *br); 1923 void br_stp_port_timer_init(struct net_bridge_port *p); 1924 unsigned long br_timer_value(const struct timer_list *timer); 1925 1926 /* br.c */ 1927 #if IS_ENABLED(CONFIG_ATM_LANE) 1928 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1929 #endif 1930 1931 /* br_mrp.c */ 1932 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1933 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1934 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1935 bool br_mrp_enabled(struct net_bridge *br); 1936 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1937 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1938 #else 1939 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1940 struct nlattr *attr, int cmd, 1941 struct netlink_ext_ack *extack) 1942 { 1943 return -EOPNOTSUPP; 1944 } 1945 1946 static inline bool br_mrp_enabled(struct net_bridge *br) 1947 { 1948 return false; 1949 } 1950 1951 static inline void br_mrp_port_del(struct net_bridge *br, 1952 struct net_bridge_port *p) 1953 { 1954 } 1955 1956 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1957 { 1958 return 0; 1959 } 1960 1961 #endif 1962 1963 /* br_cfm.c */ 1964 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1965 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1966 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1967 bool br_cfm_created(struct net_bridge *br); 1968 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1969 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1970 int br_cfm_status_fill_info(struct sk_buff *skb, 1971 struct net_bridge *br, 1972 bool getlink); 1973 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1974 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1975 #else 1976 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1977 struct nlattr *attr, int cmd, 1978 struct netlink_ext_ack *extack) 1979 { 1980 return -EOPNOTSUPP; 1981 } 1982 1983 static inline bool br_cfm_created(struct net_bridge *br) 1984 { 1985 return false; 1986 } 1987 1988 static inline void br_cfm_port_del(struct net_bridge *br, 1989 struct net_bridge_port *p) 1990 { 1991 } 1992 1993 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1994 { 1995 return -EOPNOTSUPP; 1996 } 1997 1998 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1999 struct net_bridge *br, 2000 bool getlink) 2001 { 2002 return -EOPNOTSUPP; 2003 } 2004 2005 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2006 { 2007 *count = 0; 2008 return -EOPNOTSUPP; 2009 } 2010 2011 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2012 { 2013 *count = 0; 2014 return -EOPNOTSUPP; 2015 } 2016 #endif 2017 2018 /* br_netlink.c */ 2019 extern struct rtnl_link_ops br_link_ops; 2020 int br_netlink_init(void); 2021 void br_netlink_fini(void); 2022 void br_ifinfo_notify(int event, const struct net_bridge *br, 2023 const struct net_bridge_port *port); 2024 void br_info_notify(int event, const struct net_bridge *br, 2025 const struct net_bridge_port *port, u32 filter); 2026 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2027 struct netlink_ext_ack *extack); 2028 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2029 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2030 u32 filter_mask, int nlflags); 2031 int br_process_vlan_info(struct net_bridge *br, 2032 struct net_bridge_port *p, int cmd, 2033 struct bridge_vlan_info *vinfo_curr, 2034 struct bridge_vlan_info **vinfo_last, 2035 bool *changed, 2036 struct netlink_ext_ack *extack); 2037 2038 #ifdef CONFIG_SYSFS 2039 /* br_sysfs_if.c */ 2040 extern const struct sysfs_ops brport_sysfs_ops; 2041 int br_sysfs_addif(struct net_bridge_port *p); 2042 int br_sysfs_renameif(struct net_bridge_port *p); 2043 2044 /* br_sysfs_br.c */ 2045 int br_sysfs_addbr(struct net_device *dev); 2046 void br_sysfs_delbr(struct net_device *dev); 2047 2048 #else 2049 2050 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2051 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2052 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2053 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2054 #endif /* CONFIG_SYSFS */ 2055 2056 /* br_switchdev.c */ 2057 #ifdef CONFIG_NET_SWITCHDEV 2058 int br_switchdev_port_offload(struct net_bridge_port *p, 2059 struct net_device *dev, const void *ctx, 2060 struct notifier_block *atomic_nb, 2061 struct notifier_block *blocking_nb, 2062 bool tx_fwd_offload, 2063 struct netlink_ext_ack *extack); 2064 2065 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2066 struct notifier_block *atomic_nb, 2067 struct notifier_block *blocking_nb); 2068 2069 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2070 2071 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2072 2073 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2074 struct sk_buff *skb); 2075 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2076 struct sk_buff *skb); 2077 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2078 struct sk_buff *skb); 2079 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2080 const struct sk_buff *skb); 2081 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2082 unsigned long flags, 2083 unsigned long mask, 2084 struct netlink_ext_ack *extack); 2085 void br_switchdev_fdb_notify(struct net_bridge *br, 2086 const struct net_bridge_fdb_entry *fdb, int type); 2087 void br_switchdev_mdb_notify(struct net_device *dev, 2088 struct net_bridge_mdb_entry *mp, 2089 struct net_bridge_port_group *pg, 2090 int type); 2091 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2092 bool changed, struct netlink_ext_ack *extack); 2093 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2094 void br_switchdev_init(struct net_bridge *br); 2095 2096 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2097 { 2098 skb->offload_fwd_mark = 0; 2099 } 2100 #else 2101 static inline int 2102 br_switchdev_port_offload(struct net_bridge_port *p, 2103 struct net_device *dev, const void *ctx, 2104 struct notifier_block *atomic_nb, 2105 struct notifier_block *blocking_nb, 2106 bool tx_fwd_offload, 2107 struct netlink_ext_ack *extack) 2108 { 2109 return -EOPNOTSUPP; 2110 } 2111 2112 static inline void 2113 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2114 struct notifier_block *atomic_nb, 2115 struct notifier_block *blocking_nb) 2116 { 2117 } 2118 2119 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2120 { 2121 return false; 2122 } 2123 2124 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2125 { 2126 } 2127 2128 static inline void 2129 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2130 struct sk_buff *skb) 2131 { 2132 } 2133 2134 static inline void 2135 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2136 struct sk_buff *skb) 2137 { 2138 } 2139 2140 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2141 struct sk_buff *skb) 2142 { 2143 } 2144 2145 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2146 const struct sk_buff *skb) 2147 { 2148 return true; 2149 } 2150 2151 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2152 unsigned long flags, 2153 unsigned long mask, 2154 struct netlink_ext_ack *extack) 2155 { 2156 return 0; 2157 } 2158 2159 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2160 u16 flags, bool changed, 2161 struct netlink_ext_ack *extack) 2162 { 2163 return -EOPNOTSUPP; 2164 } 2165 2166 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2167 { 2168 return -EOPNOTSUPP; 2169 } 2170 2171 static inline void 2172 br_switchdev_fdb_notify(struct net_bridge *br, 2173 const struct net_bridge_fdb_entry *fdb, int type) 2174 { 2175 } 2176 2177 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2178 struct net_bridge_mdb_entry *mp, 2179 struct net_bridge_port_group *pg, 2180 int type) 2181 { 2182 } 2183 2184 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2185 { 2186 } 2187 2188 static inline void br_switchdev_init(struct net_bridge *br) 2189 { 2190 } 2191 2192 #endif /* CONFIG_NET_SWITCHDEV */ 2193 2194 /* br_arp_nd_proxy.c */ 2195 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2196 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2197 u16 vid, struct net_bridge_port *p); 2198 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2199 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2200 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2201 #endif 2202