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 int br_mdb_hash_init(struct net_bridge *br); 962 void br_mdb_hash_fini(struct net_bridge *br); 963 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 964 struct net_bridge_port_group *pg, int type); 965 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 966 int type); 967 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 968 struct net_bridge_port_group *pg, 969 struct net_bridge_port_group __rcu **pp); 970 void br_multicast_count(struct net_bridge *br, 971 const struct net_bridge_port *p, 972 const struct sk_buff *skb, u8 type, u8 dir); 973 int br_multicast_init_stats(struct net_bridge *br); 974 void br_multicast_uninit_stats(struct net_bridge *br); 975 void br_multicast_get_stats(const struct net_bridge *br, 976 const struct net_bridge_port *p, 977 struct br_mcast_stats *dest); 978 void br_mdb_init(void); 979 void br_mdb_uninit(void); 980 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 981 struct net_bridge_mdb_entry *mp, bool notify); 982 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 983 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 984 u8 filter_mode); 985 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 986 struct net_bridge_port_group *sg); 987 struct net_bridge_group_src * 988 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 989 struct net_bridge_group_src * 990 br_multicast_new_group_src(struct net_bridge_port_group *pg, 991 struct br_ip *src_ip); 992 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 993 void br_multicast_del_group_src(struct net_bridge_group_src *src, 994 bool fastleave); 995 void br_multicast_ctx_init(struct net_bridge *br, 996 struct net_bridge_vlan *vlan, 997 struct net_bridge_mcast *brmctx); 998 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 999 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1000 struct net_bridge_vlan *vlan, 1001 struct net_bridge_mcast_port *pmctx); 1002 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1003 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1004 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1005 struct netlink_ext_ack *extack); 1006 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1007 1008 int br_rports_fill_info(struct sk_buff *skb, 1009 const struct net_bridge_mcast *brmctx); 1010 int br_multicast_dump_querier_state(struct sk_buff *skb, 1011 const struct net_bridge_mcast *brmctx, 1012 int nest_attr); 1013 size_t br_multicast_querier_state_size(void); 1014 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1015 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1016 unsigned long val); 1017 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1018 unsigned long val); 1019 1020 static inline bool br_group_is_l2(const struct br_ip *group) 1021 { 1022 return group->proto == 0; 1023 } 1024 1025 #define mlock_dereference(X, br) \ 1026 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1027 1028 static inline struct hlist_node * 1029 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1030 struct sk_buff *skb) 1031 { 1032 #if IS_ENABLED(CONFIG_IPV6) 1033 if (skb->protocol == htons(ETH_P_IPV6)) 1034 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1035 #endif 1036 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1037 } 1038 1039 static inline struct net_bridge_port * 1040 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1041 { 1042 struct net_bridge_mcast_port *mctx; 1043 1044 #if IS_ENABLED(CONFIG_IPV6) 1045 if (skb->protocol == htons(ETH_P_IPV6)) 1046 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1047 ip6_rlist); 1048 else 1049 #endif 1050 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1051 ip4_rlist); 1052 1053 if (mctx) 1054 return mctx->port; 1055 else 1056 return NULL; 1057 } 1058 1059 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1060 { 1061 return timer_pending(&brmctx->ip4_mc_router_timer); 1062 } 1063 1064 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1065 { 1066 #if IS_ENABLED(CONFIG_IPV6) 1067 return timer_pending(&brmctx->ip6_mc_router_timer); 1068 #else 1069 return false; 1070 #endif 1071 } 1072 1073 static inline bool 1074 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1075 { 1076 switch (brmctx->multicast_router) { 1077 case MDB_RTR_TYPE_PERM: 1078 return true; 1079 case MDB_RTR_TYPE_TEMP_QUERY: 1080 if (skb) { 1081 if (skb->protocol == htons(ETH_P_IP)) 1082 return br_ip4_multicast_is_router(brmctx); 1083 else if (skb->protocol == htons(ETH_P_IPV6)) 1084 return br_ip6_multicast_is_router(brmctx); 1085 } else { 1086 return br_ip4_multicast_is_router(brmctx) || 1087 br_ip6_multicast_is_router(brmctx); 1088 } 1089 fallthrough; 1090 default: 1091 return false; 1092 } 1093 } 1094 1095 static inline bool 1096 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1097 struct bridge_mcast_other_query *querier, 1098 const bool is_ipv6) 1099 { 1100 bool own_querier_enabled; 1101 1102 if (brmctx->multicast_querier) { 1103 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1104 own_querier_enabled = false; 1105 else 1106 own_querier_enabled = true; 1107 } else { 1108 own_querier_enabled = false; 1109 } 1110 1111 return time_is_before_jiffies(querier->delay_time) && 1112 (own_querier_enabled || timer_pending(&querier->timer)); 1113 } 1114 1115 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1116 struct ethhdr *eth, 1117 const struct net_bridge_mdb_entry *mdb) 1118 { 1119 switch (eth->h_proto) { 1120 case (htons(ETH_P_IP)): 1121 return __br_multicast_querier_exists(brmctx, 1122 &brmctx->ip4_other_query, false); 1123 #if IS_ENABLED(CONFIG_IPV6) 1124 case (htons(ETH_P_IPV6)): 1125 return __br_multicast_querier_exists(brmctx, 1126 &brmctx->ip6_other_query, true); 1127 #endif 1128 default: 1129 return !!mdb && br_group_is_l2(&mdb->addr); 1130 } 1131 } 1132 1133 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1134 { 1135 switch (ip->proto) { 1136 case htons(ETH_P_IP): 1137 return ipv4_is_zeronet(ip->src.ip4); 1138 #if IS_ENABLED(CONFIG_IPV6) 1139 case htons(ETH_P_IPV6): 1140 return ipv6_addr_any(&ip->src.ip6); 1141 #endif 1142 default: 1143 return false; 1144 } 1145 } 1146 1147 static inline bool 1148 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1149 __be16 proto) 1150 { 1151 switch (proto) { 1152 case htons(ETH_P_IP): 1153 return !!(brmctx->multicast_igmp_version == 3); 1154 #if IS_ENABLED(CONFIG_IPV6) 1155 case htons(ETH_P_IPV6): 1156 return !!(brmctx->multicast_mld_version == 2); 1157 #endif 1158 default: 1159 return false; 1160 } 1161 } 1162 1163 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1164 { 1165 return BR_INPUT_SKB_CB(skb)->igmp; 1166 } 1167 1168 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1169 { 1170 return brmctx->multicast_last_member_interval * 1171 brmctx->multicast_last_member_count; 1172 } 1173 1174 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1175 { 1176 return brmctx->multicast_membership_interval; 1177 } 1178 1179 static inline bool 1180 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1181 { 1182 return !!brmctx->vlan; 1183 } 1184 1185 static inline bool 1186 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1187 { 1188 return !!pmctx->vlan; 1189 } 1190 1191 static inline struct net_bridge_mcast * 1192 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1193 { 1194 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1195 return &pmctx->port->br->multicast_ctx; 1196 else 1197 return &pmctx->vlan->brvlan->br_mcast_ctx; 1198 } 1199 1200 static inline bool 1201 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1202 { 1203 return br_multicast_ctx_is_vlan(brmctx) && 1204 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1205 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1206 } 1207 1208 static inline bool 1209 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1210 { 1211 return br_multicast_ctx_is_vlan(brmctx) && 1212 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1213 } 1214 1215 static inline bool 1216 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1217 { 1218 return br_multicast_port_ctx_is_vlan(pmctx) && 1219 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1220 } 1221 1222 static inline bool 1223 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1224 { 1225 return pmctx->port->state == BR_STATE_DISABLED || 1226 (br_multicast_port_ctx_is_vlan(pmctx) && 1227 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1228 pmctx->vlan->state == BR_STATE_DISABLED)); 1229 } 1230 1231 static inline bool 1232 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1233 { 1234 return br_multicast_port_ctx_state_disabled(pmctx) || 1235 pmctx->port->state == BR_STATE_BLOCKING || 1236 (br_multicast_port_ctx_is_vlan(pmctx) && 1237 pmctx->vlan->state == BR_STATE_BLOCKING); 1238 } 1239 1240 static inline bool 1241 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1242 { 1243 #if IS_ENABLED(CONFIG_IPV6) 1244 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1245 !hlist_empty(&brmctx->ip6_mc_router_list); 1246 #else 1247 return !hlist_empty(&brmctx->ip4_mc_router_list); 1248 #endif 1249 } 1250 1251 static inline bool 1252 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1253 const struct net_bridge_mcast *brmctx2) 1254 { 1255 return brmctx1->multicast_igmp_version == 1256 brmctx2->multicast_igmp_version && 1257 brmctx1->multicast_last_member_count == 1258 brmctx2->multicast_last_member_count && 1259 brmctx1->multicast_startup_query_count == 1260 brmctx2->multicast_startup_query_count && 1261 brmctx1->multicast_last_member_interval == 1262 brmctx2->multicast_last_member_interval && 1263 brmctx1->multicast_membership_interval == 1264 brmctx2->multicast_membership_interval && 1265 brmctx1->multicast_querier_interval == 1266 brmctx2->multicast_querier_interval && 1267 brmctx1->multicast_query_interval == 1268 brmctx2->multicast_query_interval && 1269 brmctx1->multicast_query_response_interval == 1270 brmctx2->multicast_query_response_interval && 1271 brmctx1->multicast_startup_query_interval == 1272 brmctx2->multicast_startup_query_interval && 1273 brmctx1->multicast_querier == brmctx2->multicast_querier && 1274 brmctx1->multicast_router == brmctx2->multicast_router && 1275 !br_rports_have_mc_router(brmctx1) && 1276 !br_rports_have_mc_router(brmctx2) && 1277 #if IS_ENABLED(CONFIG_IPV6) 1278 brmctx1->multicast_mld_version == 1279 brmctx2->multicast_mld_version && 1280 #endif 1281 true; 1282 } 1283 1284 static inline bool 1285 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1286 { 1287 bool vlan_snooping_enabled; 1288 1289 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1290 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1291 1292 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1293 } 1294 #else 1295 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1296 struct net_bridge_mcast_port **pmctx, 1297 struct net_bridge_vlan *vlan, 1298 struct sk_buff *skb, 1299 u16 vid) 1300 { 1301 return 0; 1302 } 1303 1304 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1305 struct sk_buff *skb, u16 vid) 1306 { 1307 return NULL; 1308 } 1309 1310 static inline int br_multicast_add_port(struct net_bridge_port *port) 1311 { 1312 return 0; 1313 } 1314 1315 static inline void br_multicast_del_port(struct net_bridge_port *port) 1316 { 1317 } 1318 1319 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1320 { 1321 } 1322 1323 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1324 { 1325 } 1326 1327 static inline void br_multicast_init(struct net_bridge *br) 1328 { 1329 } 1330 1331 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1332 { 1333 } 1334 1335 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1336 { 1337 } 1338 1339 static inline void br_multicast_open(struct net_bridge *br) 1340 { 1341 } 1342 1343 static inline void br_multicast_stop(struct net_bridge *br) 1344 { 1345 } 1346 1347 static inline void br_multicast_dev_del(struct net_bridge *br) 1348 { 1349 } 1350 1351 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1352 struct sk_buff *skb, 1353 struct net_bridge_mcast *brmctx, 1354 bool local_rcv, bool local_orig) 1355 { 1356 } 1357 1358 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1359 struct sk_buff *skb) 1360 { 1361 return false; 1362 } 1363 1364 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1365 struct ethhdr *eth, 1366 const struct net_bridge_mdb_entry *mdb) 1367 { 1368 return false; 1369 } 1370 1371 static inline void br_mdb_init(void) 1372 { 1373 } 1374 1375 static inline void br_mdb_uninit(void) 1376 { 1377 } 1378 1379 static inline int br_mdb_hash_init(struct net_bridge *br) 1380 { 1381 return 0; 1382 } 1383 1384 static inline void br_mdb_hash_fini(struct net_bridge *br) 1385 { 1386 } 1387 1388 static inline void br_multicast_count(struct net_bridge *br, 1389 const struct net_bridge_port *p, 1390 const struct sk_buff *skb, 1391 u8 type, u8 dir) 1392 { 1393 } 1394 1395 static inline int br_multicast_init_stats(struct net_bridge *br) 1396 { 1397 return 0; 1398 } 1399 1400 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1401 { 1402 } 1403 1404 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1405 { 1406 return 0; 1407 } 1408 1409 static inline void br_multicast_ctx_init(struct net_bridge *br, 1410 struct net_bridge_vlan *vlan, 1411 struct net_bridge_mcast *brmctx) 1412 { 1413 } 1414 1415 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1416 { 1417 } 1418 1419 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1420 struct net_bridge_vlan *vlan, 1421 struct net_bridge_mcast_port *pmctx) 1422 { 1423 } 1424 1425 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1426 { 1427 } 1428 1429 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1430 bool on) 1431 { 1432 } 1433 1434 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1435 bool on, 1436 struct netlink_ext_ack *extack) 1437 { 1438 return -EOPNOTSUPP; 1439 } 1440 1441 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1442 bool on) 1443 { 1444 return false; 1445 } 1446 1447 static inline bool 1448 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1449 const struct net_bridge_mcast *brmctx2) 1450 { 1451 return true; 1452 } 1453 #endif 1454 1455 /* br_vlan.c */ 1456 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1457 bool br_allowed_ingress(const struct net_bridge *br, 1458 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1459 u16 *vid, u8 *state, 1460 struct net_bridge_vlan **vlan); 1461 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1462 const struct sk_buff *skb); 1463 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1464 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1465 const struct net_bridge_port *port, 1466 struct net_bridge_vlan_group *vg, 1467 struct sk_buff *skb); 1468 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1469 bool *changed, struct netlink_ext_ack *extack); 1470 int br_vlan_delete(struct net_bridge *br, u16 vid); 1471 void br_vlan_flush(struct net_bridge *br); 1472 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1473 void br_recalculate_fwd_mask(struct net_bridge *br); 1474 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1475 struct netlink_ext_ack *extack); 1476 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1477 struct netlink_ext_ack *extack); 1478 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1479 struct netlink_ext_ack *extack); 1480 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1481 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1482 int br_vlan_init(struct net_bridge *br); 1483 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1484 struct netlink_ext_ack *extack); 1485 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1486 struct netlink_ext_ack *extack); 1487 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1488 bool *changed, struct netlink_ext_ack *extack); 1489 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1490 void nbp_vlan_flush(struct net_bridge_port *port); 1491 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1492 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1493 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1494 struct pcpu_sw_netstats *stats); 1495 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1496 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1497 void *ptr); 1498 void br_vlan_rtnl_init(void); 1499 void br_vlan_rtnl_uninit(void); 1500 void br_vlan_notify(const struct net_bridge *br, 1501 const struct net_bridge_port *p, 1502 u16 vid, u16 vid_range, 1503 int cmd); 1504 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1505 const struct net_bridge_vlan *range_end); 1506 1507 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1508 struct net_device_path_ctx *ctx, 1509 struct net_device_path *path); 1510 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1511 struct net_bridge_port *dst, 1512 struct net_device_path *path); 1513 1514 static inline struct net_bridge_vlan_group *br_vlan_group( 1515 const struct net_bridge *br) 1516 { 1517 return rtnl_dereference(br->vlgrp); 1518 } 1519 1520 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1521 const struct net_bridge_port *p) 1522 { 1523 return rtnl_dereference(p->vlgrp); 1524 } 1525 1526 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1527 const struct net_bridge *br) 1528 { 1529 return rcu_dereference(br->vlgrp); 1530 } 1531 1532 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1533 const struct net_bridge_port *p) 1534 { 1535 return rcu_dereference(p->vlgrp); 1536 } 1537 1538 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1539 * skb, the vlan tag will always be present if the frame was tagged. 1540 */ 1541 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1542 { 1543 int err = 0; 1544 1545 if (skb_vlan_tag_present(skb)) { 1546 *vid = skb_vlan_tag_get_id(skb); 1547 } else { 1548 *vid = 0; 1549 err = -EINVAL; 1550 } 1551 1552 return err; 1553 } 1554 1555 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1556 { 1557 if (!vg) 1558 return 0; 1559 1560 smp_rmb(); 1561 return vg->pvid; 1562 } 1563 1564 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1565 { 1566 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1567 } 1568 #else 1569 static inline bool br_allowed_ingress(const struct net_bridge *br, 1570 struct net_bridge_vlan_group *vg, 1571 struct sk_buff *skb, 1572 u16 *vid, u8 *state, 1573 struct net_bridge_vlan **vlan) 1574 1575 { 1576 *vlan = NULL; 1577 return true; 1578 } 1579 1580 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1581 const struct sk_buff *skb) 1582 { 1583 return true; 1584 } 1585 1586 static inline bool br_should_learn(struct net_bridge_port *p, 1587 struct sk_buff *skb, u16 *vid) 1588 { 1589 return true; 1590 } 1591 1592 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1593 const struct net_bridge_port *port, 1594 struct net_bridge_vlan_group *vg, 1595 struct sk_buff *skb) 1596 { 1597 return skb; 1598 } 1599 1600 static inline int br_vlan_add(struct net_bridge *br, 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 br_vlan_delete(struct net_bridge *br, u16 vid) 1608 { 1609 return -EOPNOTSUPP; 1610 } 1611 1612 static inline void br_vlan_flush(struct net_bridge *br) 1613 { 1614 } 1615 1616 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1617 { 1618 } 1619 1620 static inline int br_vlan_init(struct net_bridge *br) 1621 { 1622 return 0; 1623 } 1624 1625 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1626 bool *changed, struct netlink_ext_ack *extack) 1627 { 1628 *changed = false; 1629 return -EOPNOTSUPP; 1630 } 1631 1632 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1633 { 1634 return -EOPNOTSUPP; 1635 } 1636 1637 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1638 { 1639 } 1640 1641 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1642 u16 vid) 1643 { 1644 return NULL; 1645 } 1646 1647 static inline int nbp_vlan_init(struct net_bridge_port *port, 1648 struct netlink_ext_ack *extack) 1649 { 1650 return 0; 1651 } 1652 1653 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1654 { 1655 return 0; 1656 } 1657 1658 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1659 { 1660 return 0; 1661 } 1662 1663 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1664 unsigned long val, 1665 struct netlink_ext_ack *extack) 1666 { 1667 return -EOPNOTSUPP; 1668 } 1669 1670 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1671 u32 filter_mask) 1672 { 1673 return 0; 1674 } 1675 1676 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1677 struct net_device_path_ctx *ctx, 1678 struct net_device_path *path) 1679 { 1680 } 1681 1682 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1683 struct net_bridge_port *dst, 1684 struct net_device_path *path) 1685 { 1686 return 0; 1687 } 1688 1689 static inline struct net_bridge_vlan_group *br_vlan_group( 1690 const struct net_bridge *br) 1691 { 1692 return NULL; 1693 } 1694 1695 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1696 const struct net_bridge_port *p) 1697 { 1698 return NULL; 1699 } 1700 1701 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1702 const struct net_bridge *br) 1703 { 1704 return NULL; 1705 } 1706 1707 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1708 const struct net_bridge_port *p) 1709 { 1710 return NULL; 1711 } 1712 1713 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1714 struct pcpu_sw_netstats *stats) 1715 { 1716 } 1717 1718 static inline void br_vlan_port_event(struct net_bridge_port *p, 1719 unsigned long event) 1720 { 1721 } 1722 1723 static inline int br_vlan_bridge_event(struct net_device *dev, 1724 unsigned long event, void *ptr) 1725 { 1726 return 0; 1727 } 1728 1729 static inline void br_vlan_rtnl_init(void) 1730 { 1731 } 1732 1733 static inline void br_vlan_rtnl_uninit(void) 1734 { 1735 } 1736 1737 static inline void br_vlan_notify(const struct net_bridge *br, 1738 const struct net_bridge_port *p, 1739 u16 vid, u16 vid_range, 1740 int cmd) 1741 { 1742 } 1743 1744 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1745 const struct net_bridge_vlan *range_end) 1746 { 1747 return true; 1748 } 1749 1750 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1751 { 1752 return 0; 1753 } 1754 1755 #endif 1756 1757 /* br_vlan_options.c */ 1758 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1759 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1760 const struct net_bridge_vlan *range_end); 1761 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1762 size_t br_vlan_opts_nl_size(void); 1763 int br_vlan_process_options(const struct net_bridge *br, 1764 const struct net_bridge_port *p, 1765 struct net_bridge_vlan *range_start, 1766 struct net_bridge_vlan *range_end, 1767 struct nlattr **tb, 1768 struct netlink_ext_ack *extack); 1769 int br_vlan_rtm_process_global_options(struct net_device *dev, 1770 const struct nlattr *attr, 1771 int cmd, 1772 struct netlink_ext_ack *extack); 1773 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1774 const struct net_bridge_vlan *r_end); 1775 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1776 const struct net_bridge_vlan *v_opts); 1777 1778 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1779 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1780 { 1781 return READ_ONCE(v->state); 1782 } 1783 1784 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1785 { 1786 WRITE_ONCE(v->state, state); 1787 } 1788 1789 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1790 { 1791 return READ_ONCE(vg->pvid_state); 1792 } 1793 1794 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1795 u8 state) 1796 { 1797 WRITE_ONCE(vg->pvid_state, state); 1798 } 1799 1800 /* learn_allow is true at ingress and false at egress */ 1801 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1802 { 1803 switch (state) { 1804 case BR_STATE_LEARNING: 1805 return learn_allow; 1806 case BR_STATE_FORWARDING: 1807 return true; 1808 default: 1809 return false; 1810 } 1811 } 1812 #endif 1813 1814 /* br_mst.c */ 1815 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1816 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1817 static inline bool br_mst_is_enabled(struct net_bridge *br) 1818 { 1819 return static_branch_unlikely(&br_mst_used) && 1820 br_opt_get(br, BROPT_MST_ENABLED); 1821 } 1822 1823 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1824 struct netlink_ext_ack *extack); 1825 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1826 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1827 int br_mst_set_enabled(struct net_bridge *br, bool on, 1828 struct netlink_ext_ack *extack); 1829 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1830 int br_mst_fill_info(struct sk_buff *skb, 1831 const struct net_bridge_vlan_group *vg); 1832 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1833 struct netlink_ext_ack *extack); 1834 #else 1835 static inline bool br_mst_is_enabled(struct net_bridge *br) 1836 { 1837 return false; 1838 } 1839 1840 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1841 u8 state, struct netlink_ext_ack *extack) 1842 { 1843 return -EOPNOTSUPP; 1844 } 1845 1846 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1847 struct netlink_ext_ack *extack) 1848 { 1849 return -EOPNOTSUPP; 1850 } 1851 1852 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1853 { 1854 return 0; 1855 } 1856 1857 static inline int br_mst_fill_info(struct sk_buff *skb, 1858 const struct net_bridge_vlan_group *vg) 1859 { 1860 return -EOPNOTSUPP; 1861 } 1862 1863 static inline int br_mst_process(struct net_bridge_port *p, 1864 const struct nlattr *mst_attr, 1865 struct netlink_ext_ack *extack) 1866 { 1867 return -EOPNOTSUPP; 1868 } 1869 #endif 1870 1871 struct nf_br_ops { 1872 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1873 }; 1874 extern const struct nf_br_ops __rcu *nf_br_ops; 1875 1876 /* br_netfilter.c */ 1877 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1878 int br_nf_core_init(void); 1879 void br_nf_core_fini(void); 1880 void br_netfilter_rtable_init(struct net_bridge *); 1881 #else 1882 static inline int br_nf_core_init(void) { return 0; } 1883 static inline void br_nf_core_fini(void) {} 1884 #define br_netfilter_rtable_init(x) 1885 #endif 1886 1887 /* br_stp.c */ 1888 void br_set_state(struct net_bridge_port *p, unsigned int state); 1889 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1890 void br_init_port(struct net_bridge_port *p); 1891 void br_become_designated_port(struct net_bridge_port *p); 1892 1893 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1894 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1895 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1896 int br_set_max_age(struct net_bridge *br, unsigned long x); 1897 int __set_ageing_time(struct net_device *dev, unsigned long t); 1898 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1899 1900 1901 /* br_stp_if.c */ 1902 void br_stp_enable_bridge(struct net_bridge *br); 1903 void br_stp_disable_bridge(struct net_bridge *br); 1904 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1905 struct netlink_ext_ack *extack); 1906 void br_stp_enable_port(struct net_bridge_port *p); 1907 void br_stp_disable_port(struct net_bridge_port *p); 1908 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1909 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1910 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1911 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1912 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1913 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1914 1915 /* br_stp_bpdu.c */ 1916 struct stp_proto; 1917 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1918 struct net_device *dev); 1919 1920 /* br_stp_timer.c */ 1921 void br_stp_timer_init(struct net_bridge *br); 1922 void br_stp_port_timer_init(struct net_bridge_port *p); 1923 unsigned long br_timer_value(const struct timer_list *timer); 1924 1925 /* br.c */ 1926 #if IS_ENABLED(CONFIG_ATM_LANE) 1927 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1928 #endif 1929 1930 /* br_mrp.c */ 1931 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1932 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1933 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1934 bool br_mrp_enabled(struct net_bridge *br); 1935 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1936 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1937 #else 1938 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1939 struct nlattr *attr, int cmd, 1940 struct netlink_ext_ack *extack) 1941 { 1942 return -EOPNOTSUPP; 1943 } 1944 1945 static inline bool br_mrp_enabled(struct net_bridge *br) 1946 { 1947 return false; 1948 } 1949 1950 static inline void br_mrp_port_del(struct net_bridge *br, 1951 struct net_bridge_port *p) 1952 { 1953 } 1954 1955 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1956 { 1957 return 0; 1958 } 1959 1960 #endif 1961 1962 /* br_cfm.c */ 1963 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1964 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1965 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1966 bool br_cfm_created(struct net_bridge *br); 1967 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1968 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1969 int br_cfm_status_fill_info(struct sk_buff *skb, 1970 struct net_bridge *br, 1971 bool getlink); 1972 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1973 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1974 #else 1975 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1976 struct nlattr *attr, int cmd, 1977 struct netlink_ext_ack *extack) 1978 { 1979 return -EOPNOTSUPP; 1980 } 1981 1982 static inline bool br_cfm_created(struct net_bridge *br) 1983 { 1984 return false; 1985 } 1986 1987 static inline void br_cfm_port_del(struct net_bridge *br, 1988 struct net_bridge_port *p) 1989 { 1990 } 1991 1992 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1993 { 1994 return -EOPNOTSUPP; 1995 } 1996 1997 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1998 struct net_bridge *br, 1999 bool getlink) 2000 { 2001 return -EOPNOTSUPP; 2002 } 2003 2004 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2005 { 2006 *count = 0; 2007 return -EOPNOTSUPP; 2008 } 2009 2010 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2011 { 2012 *count = 0; 2013 return -EOPNOTSUPP; 2014 } 2015 #endif 2016 2017 /* br_netlink.c */ 2018 extern struct rtnl_link_ops br_link_ops; 2019 int br_netlink_init(void); 2020 void br_netlink_fini(void); 2021 void br_ifinfo_notify(int event, const struct net_bridge *br, 2022 const struct net_bridge_port *port); 2023 void br_info_notify(int event, const struct net_bridge *br, 2024 const struct net_bridge_port *port, u32 filter); 2025 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2026 struct netlink_ext_ack *extack); 2027 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2028 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2029 u32 filter_mask, int nlflags); 2030 int br_process_vlan_info(struct net_bridge *br, 2031 struct net_bridge_port *p, int cmd, 2032 struct bridge_vlan_info *vinfo_curr, 2033 struct bridge_vlan_info **vinfo_last, 2034 bool *changed, 2035 struct netlink_ext_ack *extack); 2036 2037 #ifdef CONFIG_SYSFS 2038 /* br_sysfs_if.c */ 2039 extern const struct sysfs_ops brport_sysfs_ops; 2040 int br_sysfs_addif(struct net_bridge_port *p); 2041 int br_sysfs_renameif(struct net_bridge_port *p); 2042 2043 /* br_sysfs_br.c */ 2044 int br_sysfs_addbr(struct net_device *dev); 2045 void br_sysfs_delbr(struct net_device *dev); 2046 2047 #else 2048 2049 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2050 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2051 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2052 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2053 #endif /* CONFIG_SYSFS */ 2054 2055 /* br_switchdev.c */ 2056 #ifdef CONFIG_NET_SWITCHDEV 2057 int br_switchdev_port_offload(struct net_bridge_port *p, 2058 struct net_device *dev, const void *ctx, 2059 struct notifier_block *atomic_nb, 2060 struct notifier_block *blocking_nb, 2061 bool tx_fwd_offload, 2062 struct netlink_ext_ack *extack); 2063 2064 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2065 struct notifier_block *atomic_nb, 2066 struct notifier_block *blocking_nb); 2067 2068 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2069 2070 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2071 2072 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2073 struct sk_buff *skb); 2074 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2075 struct sk_buff *skb); 2076 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2077 struct sk_buff *skb); 2078 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2079 const struct sk_buff *skb); 2080 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2081 unsigned long flags, 2082 unsigned long mask, 2083 struct netlink_ext_ack *extack); 2084 void br_switchdev_fdb_notify(struct net_bridge *br, 2085 const struct net_bridge_fdb_entry *fdb, int type); 2086 void br_switchdev_mdb_notify(struct net_device *dev, 2087 struct net_bridge_mdb_entry *mp, 2088 struct net_bridge_port_group *pg, 2089 int type); 2090 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2091 bool changed, struct netlink_ext_ack *extack); 2092 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2093 void br_switchdev_init(struct net_bridge *br); 2094 2095 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2096 { 2097 skb->offload_fwd_mark = 0; 2098 } 2099 #else 2100 static inline int 2101 br_switchdev_port_offload(struct net_bridge_port *p, 2102 struct net_device *dev, const void *ctx, 2103 struct notifier_block *atomic_nb, 2104 struct notifier_block *blocking_nb, 2105 bool tx_fwd_offload, 2106 struct netlink_ext_ack *extack) 2107 { 2108 return -EOPNOTSUPP; 2109 } 2110 2111 static inline void 2112 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2113 struct notifier_block *atomic_nb, 2114 struct notifier_block *blocking_nb) 2115 { 2116 } 2117 2118 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2119 { 2120 return false; 2121 } 2122 2123 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2124 { 2125 } 2126 2127 static inline void 2128 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2129 struct sk_buff *skb) 2130 { 2131 } 2132 2133 static inline void 2134 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2135 struct sk_buff *skb) 2136 { 2137 } 2138 2139 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2140 struct sk_buff *skb) 2141 { 2142 } 2143 2144 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2145 const struct sk_buff *skb) 2146 { 2147 return true; 2148 } 2149 2150 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2151 unsigned long flags, 2152 unsigned long mask, 2153 struct netlink_ext_ack *extack) 2154 { 2155 return 0; 2156 } 2157 2158 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2159 u16 flags, bool changed, 2160 struct netlink_ext_ack *extack) 2161 { 2162 return -EOPNOTSUPP; 2163 } 2164 2165 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2166 { 2167 return -EOPNOTSUPP; 2168 } 2169 2170 static inline void 2171 br_switchdev_fdb_notify(struct net_bridge *br, 2172 const struct net_bridge_fdb_entry *fdb, int type) 2173 { 2174 } 2175 2176 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2177 struct net_bridge_mdb_entry *mp, 2178 struct net_bridge_port_group *pg, 2179 int type) 2180 { 2181 } 2182 2183 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2184 { 2185 } 2186 2187 static inline void br_switchdev_init(struct net_bridge *br) 2188 { 2189 } 2190 2191 #endif /* CONFIG_NET_SWITCHDEV */ 2192 2193 /* br_arp_nd_proxy.c */ 2194 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2195 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2196 u16 vid, struct net_bridge_port *p); 2197 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2198 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2199 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2200 #endif 2201