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 u32 mdb_n_entries; 130 u32 mdb_max_entries; 131 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 132 }; 133 134 /* net_bridge_mcast must be always defined due to forwarding stubs */ 135 struct net_bridge_mcast { 136 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 137 struct net_bridge *br; 138 struct net_bridge_vlan *vlan; 139 140 u32 multicast_last_member_count; 141 u32 multicast_startup_query_count; 142 143 u8 multicast_querier; 144 u8 multicast_igmp_version; 145 u8 multicast_router; 146 #if IS_ENABLED(CONFIG_IPV6) 147 u8 multicast_mld_version; 148 #endif 149 unsigned long multicast_last_member_interval; 150 unsigned long multicast_membership_interval; 151 unsigned long multicast_querier_interval; 152 unsigned long multicast_query_interval; 153 unsigned long multicast_query_response_interval; 154 unsigned long multicast_startup_query_interval; 155 struct hlist_head ip4_mc_router_list; 156 struct timer_list ip4_mc_router_timer; 157 struct bridge_mcast_other_query ip4_other_query; 158 struct bridge_mcast_own_query ip4_own_query; 159 struct bridge_mcast_querier ip4_querier; 160 #if IS_ENABLED(CONFIG_IPV6) 161 struct hlist_head ip6_mc_router_list; 162 struct timer_list ip6_mc_router_timer; 163 struct bridge_mcast_other_query ip6_other_query; 164 struct bridge_mcast_own_query ip6_own_query; 165 struct bridge_mcast_querier ip6_querier; 166 #endif /* IS_ENABLED(CONFIG_IPV6) */ 167 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 168 }; 169 170 struct br_tunnel_info { 171 __be64 tunnel_id; 172 struct metadata_dst __rcu *tunnel_dst; 173 }; 174 175 /* private vlan flags */ 176 enum { 177 BR_VLFLAG_PER_PORT_STATS = BIT(0), 178 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 179 BR_VLFLAG_MCAST_ENABLED = BIT(2), 180 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 181 }; 182 183 /** 184 * struct net_bridge_vlan - per-vlan entry 185 * 186 * @vnode: rhashtable member 187 * @vid: VLAN id 188 * @flags: bridge vlan flags 189 * @priv_flags: private (in-kernel) bridge vlan flags 190 * @state: STP state (e.g. blocking, learning, forwarding) 191 * @stats: per-cpu VLAN statistics 192 * @br: if MASTER flag set, this points to a bridge struct 193 * @port: if MASTER flag unset, this points to a port struct 194 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 195 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 196 * for this VLAN entry 197 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 198 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 199 * context 200 * @msti: if MASTER flag set, this holds the VLANs MST instance 201 * @vlist: sorted list of VLAN entries 202 * @rcu: used for entry destruction 203 * 204 * This structure is shared between the global per-VLAN entries contained in 205 * the bridge rhashtable and the local per-port per-VLAN entries contained in 206 * the port's rhashtable. The union entries should be interpreted depending on 207 * the entry flags that are set. 208 */ 209 struct net_bridge_vlan { 210 struct rhash_head vnode; 211 struct rhash_head tnode; 212 u16 vid; 213 u16 flags; 214 u16 priv_flags; 215 u8 state; 216 struct pcpu_sw_netstats __percpu *stats; 217 union { 218 struct net_bridge *br; 219 struct net_bridge_port *port; 220 }; 221 union { 222 refcount_t refcnt; 223 struct net_bridge_vlan *brvlan; 224 }; 225 226 struct br_tunnel_info tinfo; 227 228 union { 229 struct net_bridge_mcast br_mcast_ctx; 230 struct net_bridge_mcast_port port_mcast_ctx; 231 }; 232 233 u16 msti; 234 235 struct list_head vlist; 236 237 struct rcu_head rcu; 238 }; 239 240 /** 241 * struct net_bridge_vlan_group 242 * 243 * @vlan_hash: VLAN entry rhashtable 244 * @vlan_list: sorted VLAN entry list 245 * @num_vlans: number of total VLAN entries 246 * @pvid: PVID VLAN id 247 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 248 * 249 * IMPORTANT: Be careful when checking if there're VLAN entries using list 250 * primitives because the bridge can have entries in its list which 251 * are just for global context but not for filtering, i.e. they have 252 * the master flag set but not the brentry flag. If you have to check 253 * if there're "real" entries in the bridge please test @num_vlans 254 */ 255 struct net_bridge_vlan_group { 256 struct rhashtable vlan_hash; 257 struct rhashtable tunnel_hash; 258 struct list_head vlan_list; 259 u16 num_vlans; 260 u16 pvid; 261 u8 pvid_state; 262 }; 263 264 /* bridge fdb flags */ 265 enum { 266 BR_FDB_LOCAL, 267 BR_FDB_STATIC, 268 BR_FDB_STICKY, 269 BR_FDB_ADDED_BY_USER, 270 BR_FDB_ADDED_BY_EXT_LEARN, 271 BR_FDB_OFFLOADED, 272 BR_FDB_NOTIFY, 273 BR_FDB_NOTIFY_INACTIVE, 274 BR_FDB_LOCKED, 275 }; 276 277 struct net_bridge_fdb_key { 278 mac_addr addr; 279 u16 vlan_id; 280 }; 281 282 struct net_bridge_fdb_entry { 283 struct rhash_head rhnode; 284 struct net_bridge_port *dst; 285 286 struct net_bridge_fdb_key key; 287 struct hlist_node fdb_node; 288 unsigned long flags; 289 290 /* write-heavy members should not affect lookups */ 291 unsigned long updated ____cacheline_aligned_in_smp; 292 unsigned long used; 293 294 struct rcu_head rcu; 295 }; 296 297 struct net_bridge_fdb_flush_desc { 298 unsigned long flags; 299 unsigned long flags_mask; 300 int port_ifindex; 301 u16 vlan_id; 302 }; 303 304 #define MDB_PG_FLAGS_PERMANENT BIT(0) 305 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 306 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 307 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 308 #define MDB_PG_FLAGS_BLOCKED BIT(4) 309 310 #define PG_SRC_ENT_LIMIT 32 311 312 #define BR_SGRP_F_DELETE BIT(0) 313 #define BR_SGRP_F_SEND BIT(1) 314 #define BR_SGRP_F_INSTALLED BIT(2) 315 #define BR_SGRP_F_USER_ADDED BIT(3) 316 317 struct net_bridge_mcast_gc { 318 struct hlist_node gc_node; 319 void (*destroy)(struct net_bridge_mcast_gc *gc); 320 }; 321 322 struct net_bridge_group_src { 323 struct hlist_node node; 324 325 struct br_ip addr; 326 struct net_bridge_port_group *pg; 327 u8 flags; 328 u8 src_query_rexmit_cnt; 329 struct timer_list timer; 330 331 struct net_bridge *br; 332 struct net_bridge_mcast_gc mcast_gc; 333 struct rcu_head rcu; 334 }; 335 336 struct net_bridge_port_group_sg_key { 337 struct net_bridge_port *port; 338 struct br_ip addr; 339 }; 340 341 struct net_bridge_port_group { 342 struct net_bridge_port_group __rcu *next; 343 struct net_bridge_port_group_sg_key key; 344 unsigned char eth_addr[ETH_ALEN] __aligned(2); 345 unsigned char flags; 346 unsigned char filter_mode; 347 unsigned char grp_query_rexmit_cnt; 348 unsigned char rt_protocol; 349 350 struct hlist_head src_list; 351 unsigned int src_ents; 352 struct timer_list timer; 353 struct timer_list rexmit_timer; 354 struct hlist_node mglist; 355 struct rb_root eht_set_tree; 356 struct rb_root eht_host_tree; 357 358 struct rhash_head rhnode; 359 struct net_bridge_mcast_gc mcast_gc; 360 struct rcu_head rcu; 361 }; 362 363 struct net_bridge_mdb_entry { 364 struct rhash_head rhnode; 365 struct net_bridge *br; 366 struct net_bridge_port_group __rcu *ports; 367 struct br_ip addr; 368 bool host_joined; 369 370 struct timer_list timer; 371 struct hlist_node mdb_node; 372 373 struct net_bridge_mcast_gc mcast_gc; 374 struct rcu_head rcu; 375 }; 376 377 struct net_bridge_port { 378 struct net_bridge *br; 379 struct net_device *dev; 380 netdevice_tracker dev_tracker; 381 struct list_head list; 382 383 unsigned long flags; 384 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 385 struct net_bridge_vlan_group __rcu *vlgrp; 386 #endif 387 struct net_bridge_port __rcu *backup_port; 388 389 /* STP */ 390 u8 priority; 391 u8 state; 392 u16 port_no; 393 unsigned char topology_change_ack; 394 unsigned char config_pending; 395 port_id port_id; 396 port_id designated_port; 397 bridge_id designated_root; 398 bridge_id designated_bridge; 399 u32 path_cost; 400 u32 designated_cost; 401 unsigned long designated_age; 402 403 struct timer_list forward_delay_timer; 404 struct timer_list hold_timer; 405 struct timer_list message_age_timer; 406 struct kobject kobj; 407 struct rcu_head rcu; 408 409 struct net_bridge_mcast_port multicast_ctx; 410 411 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 412 struct bridge_mcast_stats __percpu *mcast_stats; 413 414 u32 multicast_eht_hosts_limit; 415 u32 multicast_eht_hosts_cnt; 416 struct hlist_head mglist; 417 #endif 418 419 #ifdef CONFIG_SYSFS 420 char sysfs_name[IFNAMSIZ]; 421 #endif 422 423 #ifdef CONFIG_NET_POLL_CONTROLLER 424 struct netpoll *np; 425 #endif 426 #ifdef CONFIG_NET_SWITCHDEV 427 /* Identifier used to group ports that share the same switchdev 428 * hardware domain. 429 */ 430 int hwdom; 431 int offload_count; 432 struct netdev_phys_item_id ppid; 433 #endif 434 u16 group_fwd_mask; 435 u16 backup_redirected_cnt; 436 437 struct bridge_stp_xstats stp_xstats; 438 }; 439 440 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 441 442 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 443 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 444 445 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 446 { 447 return rcu_dereference(dev->rx_handler_data); 448 } 449 450 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 451 { 452 return netif_is_bridge_port(dev) ? 453 rtnl_dereference(dev->rx_handler_data) : NULL; 454 } 455 456 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 457 { 458 return netif_is_bridge_port(dev) ? 459 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 460 } 461 462 enum net_bridge_opts { 463 BROPT_VLAN_ENABLED, 464 BROPT_VLAN_STATS_ENABLED, 465 BROPT_NF_CALL_IPTABLES, 466 BROPT_NF_CALL_IP6TABLES, 467 BROPT_NF_CALL_ARPTABLES, 468 BROPT_GROUP_ADDR_SET, 469 BROPT_MULTICAST_ENABLED, 470 BROPT_MULTICAST_QUERY_USE_IFADDR, 471 BROPT_MULTICAST_STATS_ENABLED, 472 BROPT_HAS_IPV6_ADDR, 473 BROPT_NEIGH_SUPPRESS_ENABLED, 474 BROPT_MTU_SET_BY_USER, 475 BROPT_VLAN_STATS_PER_PORT, 476 BROPT_NO_LL_LEARN, 477 BROPT_VLAN_BRIDGE_BINDING, 478 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 479 BROPT_MST_ENABLED, 480 }; 481 482 struct net_bridge { 483 spinlock_t lock; 484 spinlock_t hash_lock; 485 struct hlist_head frame_type_list; 486 struct net_device *dev; 487 unsigned long options; 488 /* These fields are accessed on each packet */ 489 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 490 __be16 vlan_proto; 491 u16 default_pvid; 492 struct net_bridge_vlan_group __rcu *vlgrp; 493 #endif 494 495 struct rhashtable fdb_hash_tbl; 496 struct list_head port_list; 497 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 498 union { 499 struct rtable fake_rtable; 500 struct rt6_info fake_rt6_info; 501 }; 502 #endif 503 u16 group_fwd_mask; 504 u16 group_fwd_mask_required; 505 506 /* STP */ 507 bridge_id designated_root; 508 bridge_id bridge_id; 509 unsigned char topology_change; 510 unsigned char topology_change_detected; 511 u16 root_port; 512 unsigned long max_age; 513 unsigned long hello_time; 514 unsigned long forward_delay; 515 unsigned long ageing_time; 516 unsigned long bridge_max_age; 517 unsigned long bridge_hello_time; 518 unsigned long bridge_forward_delay; 519 unsigned long bridge_ageing_time; 520 u32 root_path_cost; 521 522 u8 group_addr[ETH_ALEN]; 523 524 enum { 525 BR_NO_STP, /* no spanning tree */ 526 BR_KERNEL_STP, /* old STP in kernel */ 527 BR_USER_STP, /* new RSTP in userspace */ 528 } stp_enabled; 529 530 struct net_bridge_mcast multicast_ctx; 531 532 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 533 struct bridge_mcast_stats __percpu *mcast_stats; 534 535 u32 hash_max; 536 537 spinlock_t multicast_lock; 538 539 struct rhashtable mdb_hash_tbl; 540 struct rhashtable sg_port_tbl; 541 542 struct hlist_head mcast_gc_list; 543 struct hlist_head mdb_list; 544 545 struct work_struct mcast_gc_work; 546 #endif 547 548 struct timer_list hello_timer; 549 struct timer_list tcn_timer; 550 struct timer_list topology_change_timer; 551 struct delayed_work gc_work; 552 struct kobject *ifobj; 553 u32 auto_cnt; 554 555 #ifdef CONFIG_NET_SWITCHDEV 556 /* Counter used to make sure that hardware domains get unique 557 * identifiers in case a bridge spans multiple switchdev instances. 558 */ 559 int last_hwdom; 560 /* Bit mask of hardware domain numbers in use */ 561 unsigned long busy_hwdoms; 562 #endif 563 struct hlist_head fdb_list; 564 565 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 566 struct hlist_head mrp_list; 567 #endif 568 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 569 struct hlist_head mep_list; 570 #endif 571 }; 572 573 struct br_input_skb_cb { 574 struct net_device *brdev; 575 576 u16 frag_max_size; 577 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 578 u8 igmp; 579 u8 mrouters_only:1; 580 #endif 581 u8 proxyarp_replied:1; 582 u8 src_port_isolated:1; 583 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 584 u8 vlan_filtered:1; 585 #endif 586 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 587 u8 br_netfilter_broute:1; 588 #endif 589 590 #ifdef CONFIG_NET_SWITCHDEV 591 /* Set if TX data plane offloading is used towards at least one 592 * hardware domain. 593 */ 594 u8 tx_fwd_offload:1; 595 /* The switchdev hardware domain from which this packet was received. 596 * If skb->offload_fwd_mark was set, then this packet was already 597 * forwarded by hardware to the other ports in the source hardware 598 * domain, otherwise it wasn't. 599 */ 600 int src_hwdom; 601 /* Bit mask of hardware domains towards this packet has already been 602 * transmitted using the TX data plane offload. 603 */ 604 unsigned long fwd_hwdoms; 605 #endif 606 }; 607 608 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 609 610 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 611 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 612 #else 613 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 614 #endif 615 616 #define br_printk(level, br, format, args...) \ 617 printk(level "%s: " format, (br)->dev->name, ##args) 618 619 #define br_err(__br, format, args...) \ 620 br_printk(KERN_ERR, __br, format, ##args) 621 #define br_warn(__br, format, args...) \ 622 br_printk(KERN_WARNING, __br, format, ##args) 623 #define br_notice(__br, format, args...) \ 624 br_printk(KERN_NOTICE, __br, format, ##args) 625 #define br_info(__br, format, args...) \ 626 br_printk(KERN_INFO, __br, format, ##args) 627 628 #define br_debug(br, format, args...) \ 629 pr_debug("%s: " format, (br)->dev->name, ##args) 630 631 /* called under bridge lock */ 632 static inline int br_is_root_bridge(const struct net_bridge *br) 633 { 634 return !memcmp(&br->bridge_id, &br->designated_root, 8); 635 } 636 637 /* check if a VLAN entry is global */ 638 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 639 { 640 return v->flags & BRIDGE_VLAN_INFO_MASTER; 641 } 642 643 /* check if a VLAN entry is used by the bridge */ 644 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 645 { 646 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 647 } 648 649 /* check if we should use the vlan entry, returns false if it's only context */ 650 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 651 { 652 if (br_vlan_is_master(v)) { 653 if (br_vlan_is_brentry(v)) 654 return true; 655 else 656 return false; 657 } 658 659 return true; 660 } 661 662 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 663 { 664 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 665 } 666 667 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 668 { 669 bool ret = vid > 0 && vid < VLAN_VID_MASK; 670 671 if (!ret) 672 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 673 674 return ret; 675 } 676 677 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 678 const struct bridge_vlan_info *last, 679 struct netlink_ext_ack *extack) 680 { 681 /* pvid flag is not allowed in ranges */ 682 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 683 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 684 return false; 685 } 686 687 /* when cur is the range end, check if: 688 * - it has range start flag 689 * - range ids are invalid (end is equal to or before start) 690 */ 691 if (last) { 692 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 693 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 694 return false; 695 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 696 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 697 return false; 698 } else if (cur->vid <= last->vid) { 699 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 700 return false; 701 } 702 } 703 704 /* check for required range flags */ 705 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 706 BRIDGE_VLAN_INFO_RANGE_END))) { 707 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 708 return false; 709 } 710 711 return true; 712 } 713 714 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 715 { 716 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 717 718 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 719 if (!br_vlan_is_master(v)) 720 mcast_router = v->port_mcast_ctx.multicast_router; 721 else 722 mcast_router = v->br_mcast_ctx.multicast_router; 723 #endif 724 725 return mcast_router; 726 } 727 728 static inline int br_afspec_cmd_to_rtm(int cmd) 729 { 730 switch (cmd) { 731 case RTM_SETLINK: 732 return RTM_NEWVLAN; 733 case RTM_DELLINK: 734 return RTM_DELVLAN; 735 } 736 737 return 0; 738 } 739 740 static inline int br_opt_get(const struct net_bridge *br, 741 enum net_bridge_opts opt) 742 { 743 return test_bit(opt, &br->options); 744 } 745 746 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 747 struct netlink_ext_ack *extack); 748 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 749 int br_boolopt_multi_toggle(struct net_bridge *br, 750 struct br_boolopt_multi *bm, 751 struct netlink_ext_ack *extack); 752 void br_boolopt_multi_get(const struct net_bridge *br, 753 struct br_boolopt_multi *bm); 754 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 755 756 /* br_device.c */ 757 void br_dev_setup(struct net_device *dev); 758 void br_dev_delete(struct net_device *dev, struct list_head *list); 759 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 760 #ifdef CONFIG_NET_POLL_CONTROLLER 761 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 762 struct sk_buff *skb) 763 { 764 netpoll_send_skb(p->np, skb); 765 } 766 767 int br_netpoll_enable(struct net_bridge_port *p); 768 void br_netpoll_disable(struct net_bridge_port *p); 769 #else 770 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 771 struct sk_buff *skb) 772 { 773 } 774 775 static inline int br_netpoll_enable(struct net_bridge_port *p) 776 { 777 return 0; 778 } 779 780 static inline void br_netpoll_disable(struct net_bridge_port *p) 781 { 782 } 783 #endif 784 785 /* br_fdb.c */ 786 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 787 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 788 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 789 NTF_STICKY | NTF_OFFLOADED) 790 791 int br_fdb_init(void); 792 void br_fdb_fini(void); 793 int br_fdb_hash_init(struct net_bridge *br); 794 void br_fdb_hash_fini(struct net_bridge *br); 795 void br_fdb_flush(struct net_bridge *br, 796 const struct net_bridge_fdb_flush_desc *desc); 797 void br_fdb_find_delete_local(struct net_bridge *br, 798 const struct net_bridge_port *p, 799 const unsigned char *addr, u16 vid); 800 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 801 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 802 void br_fdb_cleanup(struct work_struct *work); 803 void br_fdb_delete_by_port(struct net_bridge *br, 804 const struct net_bridge_port *p, u16 vid, int do_all); 805 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 806 const unsigned char *addr, 807 __u16 vid); 808 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 809 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 810 unsigned long off); 811 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 812 const unsigned char *addr, u16 vid); 813 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 814 const unsigned char *addr, u16 vid, unsigned long flags); 815 816 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 817 struct net_device *dev, const unsigned char *addr, u16 vid, 818 struct netlink_ext_ack *extack); 819 int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], 820 struct net_device *dev, u16 vid, 821 struct netlink_ext_ack *extack); 822 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 823 const unsigned char *addr, u16 vid, u16 nlh_flags, 824 struct netlink_ext_ack *extack); 825 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 826 struct net_device *dev, struct net_device *fdev, int *idx); 827 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 828 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 829 struct netlink_ext_ack *extack); 830 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 831 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 832 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 833 const unsigned char *addr, u16 vid, 834 bool locked, bool swdev_notify); 835 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 836 const unsigned char *addr, u16 vid, 837 bool swdev_notify); 838 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 839 const unsigned char *addr, u16 vid, bool offloaded); 840 841 /* br_forward.c */ 842 enum br_pkt_type { 843 BR_PKT_UNICAST, 844 BR_PKT_MULTICAST, 845 BR_PKT_BROADCAST 846 }; 847 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 848 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 849 bool local_rcv, bool local_orig); 850 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 851 void br_flood(struct net_bridge *br, struct sk_buff *skb, 852 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 853 854 /* return true if both source port and dest port are isolated */ 855 static inline bool br_skb_isolated(const struct net_bridge_port *to, 856 const struct sk_buff *skb) 857 { 858 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 859 (to->flags & BR_ISOLATED); 860 } 861 862 /* br_if.c */ 863 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 864 int br_add_bridge(struct net *net, const char *name); 865 int br_del_bridge(struct net *net, const char *name); 866 int br_add_if(struct net_bridge *br, struct net_device *dev, 867 struct netlink_ext_ack *extack); 868 int br_del_if(struct net_bridge *br, struct net_device *dev); 869 void br_mtu_auto_adjust(struct net_bridge *br); 870 netdev_features_t br_features_recompute(struct net_bridge *br, 871 netdev_features_t features); 872 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 873 void br_manage_promisc(struct net_bridge *br); 874 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 875 876 /* br_input.c */ 877 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 878 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 879 880 struct br_frame_type { 881 __be16 type; 882 int (*frame_handler)(struct net_bridge_port *port, 883 struct sk_buff *skb); 884 struct hlist_node list; 885 }; 886 887 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 888 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 889 890 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 891 { 892 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 893 } 894 895 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 896 { 897 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 898 } 899 900 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 901 { 902 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 903 } 904 905 static inline struct net_bridge_port * 906 br_port_get_check_rtnl(const struct net_device *dev) 907 { 908 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 909 } 910 911 /* br_ioctl.c */ 912 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 913 void __user *data, int cmd); 914 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 915 struct ifreq *ifr, void __user *uarg); 916 917 /* br_multicast.c */ 918 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 919 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 920 struct net_bridge_mcast_port **pmctx, 921 struct net_bridge_vlan *vlan, 922 struct sk_buff *skb, u16 vid); 923 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 924 struct sk_buff *skb, u16 vid); 925 int br_multicast_add_port(struct net_bridge_port *port); 926 void br_multicast_del_port(struct net_bridge_port *port); 927 void br_multicast_enable_port(struct net_bridge_port *port); 928 void br_multicast_disable_port(struct net_bridge_port *port); 929 void br_multicast_init(struct net_bridge *br); 930 void br_multicast_join_snoopers(struct net_bridge *br); 931 void br_multicast_leave_snoopers(struct net_bridge *br); 932 void br_multicast_open(struct net_bridge *br); 933 void br_multicast_stop(struct net_bridge *br); 934 void br_multicast_dev_del(struct net_bridge *br); 935 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 936 struct net_bridge_mcast *brmctx, 937 bool local_rcv, bool local_orig); 938 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 939 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 940 unsigned long val); 941 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 942 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 943 struct netlink_ext_ack *extack); 944 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 945 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 946 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 947 unsigned long val); 948 #if IS_ENABLED(CONFIG_IPV6) 949 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 950 unsigned long val); 951 #endif 952 struct net_bridge_mdb_entry * 953 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 954 struct net_bridge_mdb_entry * 955 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 956 struct net_bridge_port_group * 957 br_multicast_new_port_group(struct net_bridge_port *port, 958 const struct br_ip *group, 959 struct net_bridge_port_group __rcu *next, 960 unsigned char flags, const unsigned char *src, 961 u8 filter_mode, u8 rt_protocol, 962 struct netlink_ext_ack *extack); 963 void br_multicast_del_port_group(struct net_bridge_port_group *p); 964 int br_mdb_hash_init(struct net_bridge *br); 965 void br_mdb_hash_fini(struct net_bridge *br); 966 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 967 struct net_bridge_port_group *pg, int type); 968 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 969 int type); 970 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 971 struct net_bridge_port_group *pg, 972 struct net_bridge_port_group __rcu **pp); 973 void br_multicast_count(struct net_bridge *br, 974 const struct net_bridge_port *p, 975 const struct sk_buff *skb, u8 type, u8 dir); 976 int br_multicast_init_stats(struct net_bridge *br); 977 void br_multicast_uninit_stats(struct net_bridge *br); 978 void br_multicast_get_stats(const struct net_bridge *br, 979 const struct net_bridge_port *p, 980 struct br_mcast_stats *dest); 981 void br_mdb_init(void); 982 void br_mdb_uninit(void); 983 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 984 struct net_bridge_mdb_entry *mp, bool notify); 985 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 986 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 987 u8 filter_mode); 988 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 989 struct net_bridge_port_group *sg); 990 struct net_bridge_group_src * 991 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 992 struct net_bridge_group_src * 993 br_multicast_new_group_src(struct net_bridge_port_group *pg, 994 struct br_ip *src_ip); 995 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 996 void br_multicast_del_group_src(struct net_bridge_group_src *src, 997 bool fastleave); 998 void br_multicast_ctx_init(struct net_bridge *br, 999 struct net_bridge_vlan *vlan, 1000 struct net_bridge_mcast *brmctx); 1001 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1002 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1003 struct net_bridge_vlan *vlan, 1004 struct net_bridge_mcast_port *pmctx); 1005 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1006 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1007 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1008 struct netlink_ext_ack *extack); 1009 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1010 1011 int br_rports_fill_info(struct sk_buff *skb, 1012 const struct net_bridge_mcast *brmctx); 1013 int br_multicast_dump_querier_state(struct sk_buff *skb, 1014 const struct net_bridge_mcast *brmctx, 1015 int nest_attr); 1016 size_t br_multicast_querier_state_size(void); 1017 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1018 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1019 unsigned long val); 1020 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1021 unsigned long val); 1022 1023 static inline bool br_group_is_l2(const struct br_ip *group) 1024 { 1025 return group->proto == 0; 1026 } 1027 1028 #define mlock_dereference(X, br) \ 1029 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1030 1031 static inline struct hlist_node * 1032 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1033 struct sk_buff *skb) 1034 { 1035 #if IS_ENABLED(CONFIG_IPV6) 1036 if (skb->protocol == htons(ETH_P_IPV6)) 1037 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1038 #endif 1039 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1040 } 1041 1042 static inline struct net_bridge_port * 1043 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1044 { 1045 struct net_bridge_mcast_port *mctx; 1046 1047 #if IS_ENABLED(CONFIG_IPV6) 1048 if (skb->protocol == htons(ETH_P_IPV6)) 1049 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1050 ip6_rlist); 1051 else 1052 #endif 1053 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1054 ip4_rlist); 1055 1056 if (mctx) 1057 return mctx->port; 1058 else 1059 return NULL; 1060 } 1061 1062 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1063 { 1064 return timer_pending(&brmctx->ip4_mc_router_timer); 1065 } 1066 1067 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1068 { 1069 #if IS_ENABLED(CONFIG_IPV6) 1070 return timer_pending(&brmctx->ip6_mc_router_timer); 1071 #else 1072 return false; 1073 #endif 1074 } 1075 1076 static inline bool 1077 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1078 { 1079 switch (brmctx->multicast_router) { 1080 case MDB_RTR_TYPE_PERM: 1081 return true; 1082 case MDB_RTR_TYPE_TEMP_QUERY: 1083 if (skb) { 1084 if (skb->protocol == htons(ETH_P_IP)) 1085 return br_ip4_multicast_is_router(brmctx); 1086 else if (skb->protocol == htons(ETH_P_IPV6)) 1087 return br_ip6_multicast_is_router(brmctx); 1088 } else { 1089 return br_ip4_multicast_is_router(brmctx) || 1090 br_ip6_multicast_is_router(brmctx); 1091 } 1092 fallthrough; 1093 default: 1094 return false; 1095 } 1096 } 1097 1098 static inline bool 1099 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1100 struct bridge_mcast_other_query *querier, 1101 const bool is_ipv6) 1102 { 1103 bool own_querier_enabled; 1104 1105 if (brmctx->multicast_querier) { 1106 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1107 own_querier_enabled = false; 1108 else 1109 own_querier_enabled = true; 1110 } else { 1111 own_querier_enabled = false; 1112 } 1113 1114 return time_is_before_jiffies(querier->delay_time) && 1115 (own_querier_enabled || timer_pending(&querier->timer)); 1116 } 1117 1118 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1119 struct ethhdr *eth, 1120 const struct net_bridge_mdb_entry *mdb) 1121 { 1122 switch (eth->h_proto) { 1123 case (htons(ETH_P_IP)): 1124 return __br_multicast_querier_exists(brmctx, 1125 &brmctx->ip4_other_query, false); 1126 #if IS_ENABLED(CONFIG_IPV6) 1127 case (htons(ETH_P_IPV6)): 1128 return __br_multicast_querier_exists(brmctx, 1129 &brmctx->ip6_other_query, true); 1130 #endif 1131 default: 1132 return !!mdb && br_group_is_l2(&mdb->addr); 1133 } 1134 } 1135 1136 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1137 { 1138 switch (ip->proto) { 1139 case htons(ETH_P_IP): 1140 return ipv4_is_zeronet(ip->src.ip4); 1141 #if IS_ENABLED(CONFIG_IPV6) 1142 case htons(ETH_P_IPV6): 1143 return ipv6_addr_any(&ip->src.ip6); 1144 #endif 1145 default: 1146 return false; 1147 } 1148 } 1149 1150 static inline bool 1151 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1152 __be16 proto) 1153 { 1154 switch (proto) { 1155 case htons(ETH_P_IP): 1156 return !!(brmctx->multicast_igmp_version == 3); 1157 #if IS_ENABLED(CONFIG_IPV6) 1158 case htons(ETH_P_IPV6): 1159 return !!(brmctx->multicast_mld_version == 2); 1160 #endif 1161 default: 1162 return false; 1163 } 1164 } 1165 1166 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1167 { 1168 return BR_INPUT_SKB_CB(skb)->igmp; 1169 } 1170 1171 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1172 { 1173 return brmctx->multicast_last_member_interval * 1174 brmctx->multicast_last_member_count; 1175 } 1176 1177 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1178 { 1179 return brmctx->multicast_membership_interval; 1180 } 1181 1182 static inline bool 1183 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1184 { 1185 return !!brmctx->vlan; 1186 } 1187 1188 static inline bool 1189 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1190 { 1191 return !!pmctx->vlan; 1192 } 1193 1194 static inline struct net_bridge_mcast * 1195 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1196 { 1197 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1198 return &pmctx->port->br->multicast_ctx; 1199 else 1200 return &pmctx->vlan->brvlan->br_mcast_ctx; 1201 } 1202 1203 static inline bool 1204 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1205 { 1206 return br_multicast_ctx_is_vlan(brmctx) && 1207 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1208 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1209 } 1210 1211 static inline bool 1212 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1213 { 1214 return br_multicast_ctx_is_vlan(brmctx) && 1215 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1216 } 1217 1218 static inline bool 1219 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1220 { 1221 return br_multicast_port_ctx_is_vlan(pmctx) && 1222 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1223 } 1224 1225 static inline bool 1226 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1227 { 1228 return pmctx->port->state == BR_STATE_DISABLED || 1229 (br_multicast_port_ctx_is_vlan(pmctx) && 1230 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1231 pmctx->vlan->state == BR_STATE_DISABLED)); 1232 } 1233 1234 static inline bool 1235 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1236 { 1237 return br_multicast_port_ctx_state_disabled(pmctx) || 1238 pmctx->port->state == BR_STATE_BLOCKING || 1239 (br_multicast_port_ctx_is_vlan(pmctx) && 1240 pmctx->vlan->state == BR_STATE_BLOCKING); 1241 } 1242 1243 static inline bool 1244 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1245 { 1246 #if IS_ENABLED(CONFIG_IPV6) 1247 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1248 !hlist_empty(&brmctx->ip6_mc_router_list); 1249 #else 1250 return !hlist_empty(&brmctx->ip4_mc_router_list); 1251 #endif 1252 } 1253 1254 static inline bool 1255 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1256 const struct net_bridge_mcast *brmctx2) 1257 { 1258 return brmctx1->multicast_igmp_version == 1259 brmctx2->multicast_igmp_version && 1260 brmctx1->multicast_last_member_count == 1261 brmctx2->multicast_last_member_count && 1262 brmctx1->multicast_startup_query_count == 1263 brmctx2->multicast_startup_query_count && 1264 brmctx1->multicast_last_member_interval == 1265 brmctx2->multicast_last_member_interval && 1266 brmctx1->multicast_membership_interval == 1267 brmctx2->multicast_membership_interval && 1268 brmctx1->multicast_querier_interval == 1269 brmctx2->multicast_querier_interval && 1270 brmctx1->multicast_query_interval == 1271 brmctx2->multicast_query_interval && 1272 brmctx1->multicast_query_response_interval == 1273 brmctx2->multicast_query_response_interval && 1274 brmctx1->multicast_startup_query_interval == 1275 brmctx2->multicast_startup_query_interval && 1276 brmctx1->multicast_querier == brmctx2->multicast_querier && 1277 brmctx1->multicast_router == brmctx2->multicast_router && 1278 !br_rports_have_mc_router(brmctx1) && 1279 !br_rports_have_mc_router(brmctx2) && 1280 #if IS_ENABLED(CONFIG_IPV6) 1281 brmctx1->multicast_mld_version == 1282 brmctx2->multicast_mld_version && 1283 #endif 1284 true; 1285 } 1286 1287 static inline bool 1288 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1289 { 1290 bool vlan_snooping_enabled; 1291 1292 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1293 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1294 1295 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1296 } 1297 #else 1298 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1299 struct net_bridge_mcast_port **pmctx, 1300 struct net_bridge_vlan *vlan, 1301 struct sk_buff *skb, 1302 u16 vid) 1303 { 1304 return 0; 1305 } 1306 1307 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1308 struct sk_buff *skb, u16 vid) 1309 { 1310 return NULL; 1311 } 1312 1313 static inline int br_multicast_add_port(struct net_bridge_port *port) 1314 { 1315 return 0; 1316 } 1317 1318 static inline void br_multicast_del_port(struct net_bridge_port *port) 1319 { 1320 } 1321 1322 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1323 { 1324 } 1325 1326 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1327 { 1328 } 1329 1330 static inline void br_multicast_init(struct net_bridge *br) 1331 { 1332 } 1333 1334 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1335 { 1336 } 1337 1338 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1339 { 1340 } 1341 1342 static inline void br_multicast_open(struct net_bridge *br) 1343 { 1344 } 1345 1346 static inline void br_multicast_stop(struct net_bridge *br) 1347 { 1348 } 1349 1350 static inline void br_multicast_dev_del(struct net_bridge *br) 1351 { 1352 } 1353 1354 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1355 struct sk_buff *skb, 1356 struct net_bridge_mcast *brmctx, 1357 bool local_rcv, bool local_orig) 1358 { 1359 } 1360 1361 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1362 struct sk_buff *skb) 1363 { 1364 return false; 1365 } 1366 1367 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1368 struct ethhdr *eth, 1369 const struct net_bridge_mdb_entry *mdb) 1370 { 1371 return false; 1372 } 1373 1374 static inline void br_mdb_init(void) 1375 { 1376 } 1377 1378 static inline void br_mdb_uninit(void) 1379 { 1380 } 1381 1382 static inline int br_mdb_hash_init(struct net_bridge *br) 1383 { 1384 return 0; 1385 } 1386 1387 static inline void br_mdb_hash_fini(struct net_bridge *br) 1388 { 1389 } 1390 1391 static inline void br_multicast_count(struct net_bridge *br, 1392 const struct net_bridge_port *p, 1393 const struct sk_buff *skb, 1394 u8 type, u8 dir) 1395 { 1396 } 1397 1398 static inline int br_multicast_init_stats(struct net_bridge *br) 1399 { 1400 return 0; 1401 } 1402 1403 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1404 { 1405 } 1406 1407 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1408 { 1409 return 0; 1410 } 1411 1412 static inline void br_multicast_ctx_init(struct net_bridge *br, 1413 struct net_bridge_vlan *vlan, 1414 struct net_bridge_mcast *brmctx) 1415 { 1416 } 1417 1418 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1419 { 1420 } 1421 1422 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1423 struct net_bridge_vlan *vlan, 1424 struct net_bridge_mcast_port *pmctx) 1425 { 1426 } 1427 1428 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1429 { 1430 } 1431 1432 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1433 bool on) 1434 { 1435 } 1436 1437 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1438 bool on, 1439 struct netlink_ext_ack *extack) 1440 { 1441 return -EOPNOTSUPP; 1442 } 1443 1444 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1445 bool on) 1446 { 1447 return false; 1448 } 1449 1450 static inline bool 1451 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1452 const struct net_bridge_mcast *brmctx2) 1453 { 1454 return true; 1455 } 1456 #endif 1457 1458 /* br_vlan.c */ 1459 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1460 bool br_allowed_ingress(const struct net_bridge *br, 1461 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1462 u16 *vid, u8 *state, 1463 struct net_bridge_vlan **vlan); 1464 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1465 const struct sk_buff *skb); 1466 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1467 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1468 const struct net_bridge_port *port, 1469 struct net_bridge_vlan_group *vg, 1470 struct sk_buff *skb); 1471 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1472 bool *changed, struct netlink_ext_ack *extack); 1473 int br_vlan_delete(struct net_bridge *br, u16 vid); 1474 void br_vlan_flush(struct net_bridge *br); 1475 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1476 void br_recalculate_fwd_mask(struct net_bridge *br); 1477 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1478 struct netlink_ext_ack *extack); 1479 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1480 struct netlink_ext_ack *extack); 1481 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1482 struct netlink_ext_ack *extack); 1483 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1484 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1485 int br_vlan_init(struct net_bridge *br); 1486 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1487 struct netlink_ext_ack *extack); 1488 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1489 struct netlink_ext_ack *extack); 1490 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1491 bool *changed, struct netlink_ext_ack *extack); 1492 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1493 void nbp_vlan_flush(struct net_bridge_port *port); 1494 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1495 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1496 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1497 struct pcpu_sw_netstats *stats); 1498 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1499 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1500 void *ptr); 1501 void br_vlan_rtnl_init(void); 1502 void br_vlan_rtnl_uninit(void); 1503 void br_vlan_notify(const struct net_bridge *br, 1504 const struct net_bridge_port *p, 1505 u16 vid, u16 vid_range, 1506 int cmd); 1507 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1508 const struct net_bridge_vlan *range_end); 1509 1510 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1511 struct net_device_path_ctx *ctx, 1512 struct net_device_path *path); 1513 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1514 struct net_bridge_port *dst, 1515 struct net_device_path *path); 1516 1517 static inline struct net_bridge_vlan_group *br_vlan_group( 1518 const struct net_bridge *br) 1519 { 1520 return rtnl_dereference(br->vlgrp); 1521 } 1522 1523 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1524 const struct net_bridge_port *p) 1525 { 1526 return rtnl_dereference(p->vlgrp); 1527 } 1528 1529 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1530 const struct net_bridge *br) 1531 { 1532 return rcu_dereference(br->vlgrp); 1533 } 1534 1535 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1536 const struct net_bridge_port *p) 1537 { 1538 return rcu_dereference(p->vlgrp); 1539 } 1540 1541 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1542 * skb, the vlan tag will always be present if the frame was tagged. 1543 */ 1544 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1545 { 1546 int err = 0; 1547 1548 if (skb_vlan_tag_present(skb)) { 1549 *vid = skb_vlan_tag_get_id(skb); 1550 } else { 1551 *vid = 0; 1552 err = -EINVAL; 1553 } 1554 1555 return err; 1556 } 1557 1558 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1559 { 1560 if (!vg) 1561 return 0; 1562 1563 smp_rmb(); 1564 return vg->pvid; 1565 } 1566 1567 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1568 { 1569 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1570 } 1571 #else 1572 static inline bool br_allowed_ingress(const struct net_bridge *br, 1573 struct net_bridge_vlan_group *vg, 1574 struct sk_buff *skb, 1575 u16 *vid, u8 *state, 1576 struct net_bridge_vlan **vlan) 1577 1578 { 1579 *vlan = NULL; 1580 return true; 1581 } 1582 1583 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1584 const struct sk_buff *skb) 1585 { 1586 return true; 1587 } 1588 1589 static inline bool br_should_learn(struct net_bridge_port *p, 1590 struct sk_buff *skb, u16 *vid) 1591 { 1592 return true; 1593 } 1594 1595 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1596 const struct net_bridge_port *port, 1597 struct net_bridge_vlan_group *vg, 1598 struct sk_buff *skb) 1599 { 1600 return skb; 1601 } 1602 1603 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1604 bool *changed, struct netlink_ext_ack *extack) 1605 { 1606 *changed = false; 1607 return -EOPNOTSUPP; 1608 } 1609 1610 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1611 { 1612 return -EOPNOTSUPP; 1613 } 1614 1615 static inline void br_vlan_flush(struct net_bridge *br) 1616 { 1617 } 1618 1619 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1620 { 1621 } 1622 1623 static inline int br_vlan_init(struct net_bridge *br) 1624 { 1625 return 0; 1626 } 1627 1628 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1629 bool *changed, struct netlink_ext_ack *extack) 1630 { 1631 *changed = false; 1632 return -EOPNOTSUPP; 1633 } 1634 1635 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1636 { 1637 return -EOPNOTSUPP; 1638 } 1639 1640 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1641 { 1642 } 1643 1644 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1645 u16 vid) 1646 { 1647 return NULL; 1648 } 1649 1650 static inline int nbp_vlan_init(struct net_bridge_port *port, 1651 struct netlink_ext_ack *extack) 1652 { 1653 return 0; 1654 } 1655 1656 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1657 { 1658 return 0; 1659 } 1660 1661 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1662 { 1663 return 0; 1664 } 1665 1666 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1667 unsigned long val, 1668 struct netlink_ext_ack *extack) 1669 { 1670 return -EOPNOTSUPP; 1671 } 1672 1673 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1674 u32 filter_mask) 1675 { 1676 return 0; 1677 } 1678 1679 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1680 struct net_device_path_ctx *ctx, 1681 struct net_device_path *path) 1682 { 1683 } 1684 1685 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1686 struct net_bridge_port *dst, 1687 struct net_device_path *path) 1688 { 1689 return 0; 1690 } 1691 1692 static inline struct net_bridge_vlan_group *br_vlan_group( 1693 const struct net_bridge *br) 1694 { 1695 return NULL; 1696 } 1697 1698 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1699 const struct net_bridge_port *p) 1700 { 1701 return NULL; 1702 } 1703 1704 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1705 const struct net_bridge *br) 1706 { 1707 return NULL; 1708 } 1709 1710 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1711 const struct net_bridge_port *p) 1712 { 1713 return NULL; 1714 } 1715 1716 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1717 struct pcpu_sw_netstats *stats) 1718 { 1719 } 1720 1721 static inline void br_vlan_port_event(struct net_bridge_port *p, 1722 unsigned long event) 1723 { 1724 } 1725 1726 static inline int br_vlan_bridge_event(struct net_device *dev, 1727 unsigned long event, void *ptr) 1728 { 1729 return 0; 1730 } 1731 1732 static inline void br_vlan_rtnl_init(void) 1733 { 1734 } 1735 1736 static inline void br_vlan_rtnl_uninit(void) 1737 { 1738 } 1739 1740 static inline void br_vlan_notify(const struct net_bridge *br, 1741 const struct net_bridge_port *p, 1742 u16 vid, u16 vid_range, 1743 int cmd) 1744 { 1745 } 1746 1747 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1748 const struct net_bridge_vlan *range_end) 1749 { 1750 return true; 1751 } 1752 1753 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1754 { 1755 return 0; 1756 } 1757 1758 #endif 1759 1760 /* br_vlan_options.c */ 1761 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1762 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1763 const struct net_bridge_vlan *range_end); 1764 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1765 size_t br_vlan_opts_nl_size(void); 1766 int br_vlan_process_options(const struct net_bridge *br, 1767 const struct net_bridge_port *p, 1768 struct net_bridge_vlan *range_start, 1769 struct net_bridge_vlan *range_end, 1770 struct nlattr **tb, 1771 struct netlink_ext_ack *extack); 1772 int br_vlan_rtm_process_global_options(struct net_device *dev, 1773 const struct nlattr *attr, 1774 int cmd, 1775 struct netlink_ext_ack *extack); 1776 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1777 const struct net_bridge_vlan *r_end); 1778 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1779 const struct net_bridge_vlan *v_opts); 1780 1781 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1782 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1783 { 1784 return READ_ONCE(v->state); 1785 } 1786 1787 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1788 { 1789 WRITE_ONCE(v->state, state); 1790 } 1791 1792 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1793 { 1794 return READ_ONCE(vg->pvid_state); 1795 } 1796 1797 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1798 u8 state) 1799 { 1800 WRITE_ONCE(vg->pvid_state, state); 1801 } 1802 1803 /* learn_allow is true at ingress and false at egress */ 1804 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1805 { 1806 switch (state) { 1807 case BR_STATE_LEARNING: 1808 return learn_allow; 1809 case BR_STATE_FORWARDING: 1810 return true; 1811 default: 1812 return false; 1813 } 1814 } 1815 #endif 1816 1817 /* br_mst.c */ 1818 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1819 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1820 static inline bool br_mst_is_enabled(struct net_bridge *br) 1821 { 1822 return static_branch_unlikely(&br_mst_used) && 1823 br_opt_get(br, BROPT_MST_ENABLED); 1824 } 1825 1826 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1827 struct netlink_ext_ack *extack); 1828 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1829 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1830 int br_mst_set_enabled(struct net_bridge *br, bool on, 1831 struct netlink_ext_ack *extack); 1832 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1833 int br_mst_fill_info(struct sk_buff *skb, 1834 const struct net_bridge_vlan_group *vg); 1835 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1836 struct netlink_ext_ack *extack); 1837 #else 1838 static inline bool br_mst_is_enabled(struct net_bridge *br) 1839 { 1840 return false; 1841 } 1842 1843 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1844 u8 state, struct netlink_ext_ack *extack) 1845 { 1846 return -EOPNOTSUPP; 1847 } 1848 1849 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1850 struct netlink_ext_ack *extack) 1851 { 1852 return -EOPNOTSUPP; 1853 } 1854 1855 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1856 { 1857 return 0; 1858 } 1859 1860 static inline int br_mst_fill_info(struct sk_buff *skb, 1861 const struct net_bridge_vlan_group *vg) 1862 { 1863 return -EOPNOTSUPP; 1864 } 1865 1866 static inline int br_mst_process(struct net_bridge_port *p, 1867 const struct nlattr *mst_attr, 1868 struct netlink_ext_ack *extack) 1869 { 1870 return -EOPNOTSUPP; 1871 } 1872 #endif 1873 1874 struct nf_br_ops { 1875 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1876 }; 1877 extern const struct nf_br_ops __rcu *nf_br_ops; 1878 1879 /* br_netfilter.c */ 1880 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1881 int br_nf_core_init(void); 1882 void br_nf_core_fini(void); 1883 void br_netfilter_rtable_init(struct net_bridge *); 1884 #else 1885 static inline int br_nf_core_init(void) { return 0; } 1886 static inline void br_nf_core_fini(void) {} 1887 #define br_netfilter_rtable_init(x) 1888 #endif 1889 1890 /* br_stp.c */ 1891 void br_set_state(struct net_bridge_port *p, unsigned int state); 1892 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1893 void br_init_port(struct net_bridge_port *p); 1894 void br_become_designated_port(struct net_bridge_port *p); 1895 1896 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1897 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1898 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1899 int br_set_max_age(struct net_bridge *br, unsigned long x); 1900 int __set_ageing_time(struct net_device *dev, unsigned long t); 1901 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1902 1903 1904 /* br_stp_if.c */ 1905 void br_stp_enable_bridge(struct net_bridge *br); 1906 void br_stp_disable_bridge(struct net_bridge *br); 1907 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1908 struct netlink_ext_ack *extack); 1909 void br_stp_enable_port(struct net_bridge_port *p); 1910 void br_stp_disable_port(struct net_bridge_port *p); 1911 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1912 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1913 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1914 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1915 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1916 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1917 1918 /* br_stp_bpdu.c */ 1919 struct stp_proto; 1920 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1921 struct net_device *dev); 1922 1923 /* br_stp_timer.c */ 1924 void br_stp_timer_init(struct net_bridge *br); 1925 void br_stp_port_timer_init(struct net_bridge_port *p); 1926 unsigned long br_timer_value(const struct timer_list *timer); 1927 1928 /* br.c */ 1929 #if IS_ENABLED(CONFIG_ATM_LANE) 1930 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1931 #endif 1932 1933 /* br_mrp.c */ 1934 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1935 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1936 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1937 bool br_mrp_enabled(struct net_bridge *br); 1938 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1939 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1940 #else 1941 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1942 struct nlattr *attr, int cmd, 1943 struct netlink_ext_ack *extack) 1944 { 1945 return -EOPNOTSUPP; 1946 } 1947 1948 static inline bool br_mrp_enabled(struct net_bridge *br) 1949 { 1950 return false; 1951 } 1952 1953 static inline void br_mrp_port_del(struct net_bridge *br, 1954 struct net_bridge_port *p) 1955 { 1956 } 1957 1958 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1959 { 1960 return 0; 1961 } 1962 1963 #endif 1964 1965 /* br_cfm.c */ 1966 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1967 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1968 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1969 bool br_cfm_created(struct net_bridge *br); 1970 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1971 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1972 int br_cfm_status_fill_info(struct sk_buff *skb, 1973 struct net_bridge *br, 1974 bool getlink); 1975 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1976 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1977 #else 1978 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1979 struct nlattr *attr, int cmd, 1980 struct netlink_ext_ack *extack) 1981 { 1982 return -EOPNOTSUPP; 1983 } 1984 1985 static inline bool br_cfm_created(struct net_bridge *br) 1986 { 1987 return false; 1988 } 1989 1990 static inline void br_cfm_port_del(struct net_bridge *br, 1991 struct net_bridge_port *p) 1992 { 1993 } 1994 1995 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1996 { 1997 return -EOPNOTSUPP; 1998 } 1999 2000 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2001 struct net_bridge *br, 2002 bool getlink) 2003 { 2004 return -EOPNOTSUPP; 2005 } 2006 2007 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2008 { 2009 *count = 0; 2010 return -EOPNOTSUPP; 2011 } 2012 2013 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2014 { 2015 *count = 0; 2016 return -EOPNOTSUPP; 2017 } 2018 #endif 2019 2020 /* br_netlink.c */ 2021 extern struct rtnl_link_ops br_link_ops; 2022 int br_netlink_init(void); 2023 void br_netlink_fini(void); 2024 void br_ifinfo_notify(int event, const struct net_bridge *br, 2025 const struct net_bridge_port *port); 2026 void br_info_notify(int event, const struct net_bridge *br, 2027 const struct net_bridge_port *port, u32 filter); 2028 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2029 struct netlink_ext_ack *extack); 2030 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2031 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2032 u32 filter_mask, int nlflags); 2033 int br_process_vlan_info(struct net_bridge *br, 2034 struct net_bridge_port *p, int cmd, 2035 struct bridge_vlan_info *vinfo_curr, 2036 struct bridge_vlan_info **vinfo_last, 2037 bool *changed, 2038 struct netlink_ext_ack *extack); 2039 2040 #ifdef CONFIG_SYSFS 2041 /* br_sysfs_if.c */ 2042 extern const struct sysfs_ops brport_sysfs_ops; 2043 int br_sysfs_addif(struct net_bridge_port *p); 2044 int br_sysfs_renameif(struct net_bridge_port *p); 2045 2046 /* br_sysfs_br.c */ 2047 int br_sysfs_addbr(struct net_device *dev); 2048 void br_sysfs_delbr(struct net_device *dev); 2049 2050 #else 2051 2052 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2053 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2054 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2055 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2056 #endif /* CONFIG_SYSFS */ 2057 2058 /* br_switchdev.c */ 2059 #ifdef CONFIG_NET_SWITCHDEV 2060 int br_switchdev_port_offload(struct net_bridge_port *p, 2061 struct net_device *dev, const void *ctx, 2062 struct notifier_block *atomic_nb, 2063 struct notifier_block *blocking_nb, 2064 bool tx_fwd_offload, 2065 struct netlink_ext_ack *extack); 2066 2067 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2068 struct notifier_block *atomic_nb, 2069 struct notifier_block *blocking_nb); 2070 2071 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2072 2073 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2074 2075 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2076 struct sk_buff *skb); 2077 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2078 struct sk_buff *skb); 2079 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2080 struct sk_buff *skb); 2081 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2082 const struct sk_buff *skb); 2083 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2084 unsigned long flags, 2085 unsigned long mask, 2086 struct netlink_ext_ack *extack); 2087 void br_switchdev_fdb_notify(struct net_bridge *br, 2088 const struct net_bridge_fdb_entry *fdb, int type); 2089 void br_switchdev_mdb_notify(struct net_device *dev, 2090 struct net_bridge_mdb_entry *mp, 2091 struct net_bridge_port_group *pg, 2092 int type); 2093 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2094 bool changed, struct netlink_ext_ack *extack); 2095 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2096 void br_switchdev_init(struct net_bridge *br); 2097 2098 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2099 { 2100 skb->offload_fwd_mark = 0; 2101 } 2102 #else 2103 static inline int 2104 br_switchdev_port_offload(struct net_bridge_port *p, 2105 struct net_device *dev, const void *ctx, 2106 struct notifier_block *atomic_nb, 2107 struct notifier_block *blocking_nb, 2108 bool tx_fwd_offload, 2109 struct netlink_ext_ack *extack) 2110 { 2111 return -EOPNOTSUPP; 2112 } 2113 2114 static inline void 2115 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2116 struct notifier_block *atomic_nb, 2117 struct notifier_block *blocking_nb) 2118 { 2119 } 2120 2121 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2122 { 2123 return false; 2124 } 2125 2126 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2127 { 2128 } 2129 2130 static inline void 2131 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2132 struct sk_buff *skb) 2133 { 2134 } 2135 2136 static inline void 2137 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2138 struct sk_buff *skb) 2139 { 2140 } 2141 2142 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2143 struct sk_buff *skb) 2144 { 2145 } 2146 2147 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2148 const struct sk_buff *skb) 2149 { 2150 return true; 2151 } 2152 2153 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2154 unsigned long flags, 2155 unsigned long mask, 2156 struct netlink_ext_ack *extack) 2157 { 2158 return 0; 2159 } 2160 2161 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2162 u16 flags, bool changed, 2163 struct netlink_ext_ack *extack) 2164 { 2165 return -EOPNOTSUPP; 2166 } 2167 2168 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2169 { 2170 return -EOPNOTSUPP; 2171 } 2172 2173 static inline void 2174 br_switchdev_fdb_notify(struct net_bridge *br, 2175 const struct net_bridge_fdb_entry *fdb, int type) 2176 { 2177 } 2178 2179 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2180 struct net_bridge_mdb_entry *mp, 2181 struct net_bridge_port_group *pg, 2182 int type) 2183 { 2184 } 2185 2186 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2187 { 2188 } 2189 2190 static inline void br_switchdev_init(struct net_bridge *br) 2191 { 2192 } 2193 2194 #endif /* CONFIG_NET_SWITCHDEV */ 2195 2196 /* br_arp_nd_proxy.c */ 2197 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2198 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2199 u16 vid, struct net_bridge_port *p); 2200 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2201 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2202 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2203 #endif 2204