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 u16 vid); 854 855 /* return true if both source port and dest port are isolated */ 856 static inline bool br_skb_isolated(const struct net_bridge_port *to, 857 const struct sk_buff *skb) 858 { 859 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 860 (to->flags & BR_ISOLATED); 861 } 862 863 /* br_if.c */ 864 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 865 int br_add_bridge(struct net *net, const char *name); 866 int br_del_bridge(struct net *net, const char *name); 867 int br_add_if(struct net_bridge *br, struct net_device *dev, 868 struct netlink_ext_ack *extack); 869 int br_del_if(struct net_bridge *br, struct net_device *dev); 870 void br_mtu_auto_adjust(struct net_bridge *br); 871 netdev_features_t br_features_recompute(struct net_bridge *br, 872 netdev_features_t features); 873 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 874 void br_manage_promisc(struct net_bridge *br); 875 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 876 877 /* br_input.c */ 878 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 879 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 880 881 struct br_frame_type { 882 __be16 type; 883 int (*frame_handler)(struct net_bridge_port *port, 884 struct sk_buff *skb); 885 struct hlist_node list; 886 }; 887 888 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 889 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 890 891 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 892 { 893 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 894 } 895 896 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 897 { 898 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 899 } 900 901 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 902 { 903 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 904 } 905 906 static inline struct net_bridge_port * 907 br_port_get_check_rtnl(const struct net_device *dev) 908 { 909 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 910 } 911 912 /* br_ioctl.c */ 913 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 914 void __user *data, int cmd); 915 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 916 struct ifreq *ifr, void __user *uarg); 917 918 /* br_multicast.c */ 919 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 920 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 921 struct net_bridge_mcast_port **pmctx, 922 struct net_bridge_vlan *vlan, 923 struct sk_buff *skb, u16 vid); 924 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 925 struct sk_buff *skb, u16 vid); 926 int br_multicast_add_port(struct net_bridge_port *port); 927 void br_multicast_del_port(struct net_bridge_port *port); 928 void br_multicast_enable_port(struct net_bridge_port *port); 929 void br_multicast_disable_port(struct net_bridge_port *port); 930 void br_multicast_init(struct net_bridge *br); 931 void br_multicast_join_snoopers(struct net_bridge *br); 932 void br_multicast_leave_snoopers(struct net_bridge *br); 933 void br_multicast_open(struct net_bridge *br); 934 void br_multicast_stop(struct net_bridge *br); 935 void br_multicast_dev_del(struct net_bridge *br); 936 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 937 struct net_bridge_mcast *brmctx, 938 bool local_rcv, bool local_orig); 939 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 940 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 941 unsigned long val); 942 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 943 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 944 struct netlink_ext_ack *extack); 945 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 946 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 947 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 948 unsigned long val); 949 #if IS_ENABLED(CONFIG_IPV6) 950 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 951 unsigned long val); 952 #endif 953 struct net_bridge_mdb_entry * 954 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 955 struct net_bridge_mdb_entry * 956 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 957 struct net_bridge_port_group * 958 br_multicast_new_port_group(struct net_bridge_port *port, 959 const struct br_ip *group, 960 struct net_bridge_port_group __rcu *next, 961 unsigned char flags, const unsigned char *src, 962 u8 filter_mode, u8 rt_protocol, 963 struct netlink_ext_ack *extack); 964 void br_multicast_del_port_group(struct net_bridge_port_group *p); 965 int br_mdb_hash_init(struct net_bridge *br); 966 void br_mdb_hash_fini(struct net_bridge *br); 967 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 968 struct net_bridge_port_group *pg, int type); 969 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 970 int type); 971 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 972 struct net_bridge_port_group *pg, 973 struct net_bridge_port_group __rcu **pp); 974 void br_multicast_count(struct net_bridge *br, 975 const struct net_bridge_port *p, 976 const struct sk_buff *skb, u8 type, u8 dir); 977 int br_multicast_init_stats(struct net_bridge *br); 978 void br_multicast_uninit_stats(struct net_bridge *br); 979 void br_multicast_get_stats(const struct net_bridge *br, 980 const struct net_bridge_port *p, 981 struct br_mcast_stats *dest); 982 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 983 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 984 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 985 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 986 struct netlink_ext_ack *extack); 987 int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 988 struct netlink_ext_ack *extack); 989 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 990 struct netlink_callback *cb); 991 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 992 struct net_bridge_mdb_entry *mp, bool notify); 993 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 994 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 995 u8 filter_mode); 996 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 997 struct net_bridge_port_group *sg); 998 struct net_bridge_group_src * 999 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1000 struct net_bridge_group_src * 1001 br_multicast_new_group_src(struct net_bridge_port_group *pg, 1002 struct br_ip *src_ip); 1003 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1004 void br_multicast_del_group_src(struct net_bridge_group_src *src, 1005 bool fastleave); 1006 void br_multicast_ctx_init(struct net_bridge *br, 1007 struct net_bridge_vlan *vlan, 1008 struct net_bridge_mcast *brmctx); 1009 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1010 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1011 struct net_bridge_vlan *vlan, 1012 struct net_bridge_mcast_port *pmctx); 1013 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1014 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1015 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1016 struct netlink_ext_ack *extack); 1017 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1018 1019 int br_rports_fill_info(struct sk_buff *skb, 1020 const struct net_bridge_mcast *brmctx); 1021 int br_multicast_dump_querier_state(struct sk_buff *skb, 1022 const struct net_bridge_mcast *brmctx, 1023 int nest_attr); 1024 size_t br_multicast_querier_state_size(void); 1025 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1026 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1027 unsigned long val); 1028 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1029 unsigned long val); 1030 1031 static inline bool br_group_is_l2(const struct br_ip *group) 1032 { 1033 return group->proto == 0; 1034 } 1035 1036 #define mlock_dereference(X, br) \ 1037 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1038 1039 static inline struct hlist_node * 1040 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1041 struct sk_buff *skb) 1042 { 1043 #if IS_ENABLED(CONFIG_IPV6) 1044 if (skb->protocol == htons(ETH_P_IPV6)) 1045 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1046 #endif 1047 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1048 } 1049 1050 static inline struct net_bridge_port * 1051 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1052 { 1053 struct net_bridge_mcast_port *mctx; 1054 1055 #if IS_ENABLED(CONFIG_IPV6) 1056 if (skb->protocol == htons(ETH_P_IPV6)) 1057 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1058 ip6_rlist); 1059 else 1060 #endif 1061 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1062 ip4_rlist); 1063 1064 if (mctx) 1065 return mctx->port; 1066 else 1067 return NULL; 1068 } 1069 1070 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1071 { 1072 return timer_pending(&brmctx->ip4_mc_router_timer); 1073 } 1074 1075 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1076 { 1077 #if IS_ENABLED(CONFIG_IPV6) 1078 return timer_pending(&brmctx->ip6_mc_router_timer); 1079 #else 1080 return false; 1081 #endif 1082 } 1083 1084 static inline bool 1085 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1086 { 1087 switch (brmctx->multicast_router) { 1088 case MDB_RTR_TYPE_PERM: 1089 return true; 1090 case MDB_RTR_TYPE_TEMP_QUERY: 1091 if (skb) { 1092 if (skb->protocol == htons(ETH_P_IP)) 1093 return br_ip4_multicast_is_router(brmctx); 1094 else if (skb->protocol == htons(ETH_P_IPV6)) 1095 return br_ip6_multicast_is_router(brmctx); 1096 } else { 1097 return br_ip4_multicast_is_router(brmctx) || 1098 br_ip6_multicast_is_router(brmctx); 1099 } 1100 fallthrough; 1101 default: 1102 return false; 1103 } 1104 } 1105 1106 static inline bool 1107 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1108 struct bridge_mcast_other_query *querier, 1109 const bool is_ipv6) 1110 { 1111 bool own_querier_enabled; 1112 1113 if (brmctx->multicast_querier) { 1114 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1115 own_querier_enabled = false; 1116 else 1117 own_querier_enabled = true; 1118 } else { 1119 own_querier_enabled = false; 1120 } 1121 1122 return time_is_before_jiffies(querier->delay_time) && 1123 (own_querier_enabled || timer_pending(&querier->timer)); 1124 } 1125 1126 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1127 struct ethhdr *eth, 1128 const struct net_bridge_mdb_entry *mdb) 1129 { 1130 switch (eth->h_proto) { 1131 case (htons(ETH_P_IP)): 1132 return __br_multicast_querier_exists(brmctx, 1133 &brmctx->ip4_other_query, false); 1134 #if IS_ENABLED(CONFIG_IPV6) 1135 case (htons(ETH_P_IPV6)): 1136 return __br_multicast_querier_exists(brmctx, 1137 &brmctx->ip6_other_query, true); 1138 #endif 1139 default: 1140 return !!mdb && br_group_is_l2(&mdb->addr); 1141 } 1142 } 1143 1144 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1145 { 1146 switch (ip->proto) { 1147 case htons(ETH_P_IP): 1148 return ipv4_is_zeronet(ip->src.ip4); 1149 #if IS_ENABLED(CONFIG_IPV6) 1150 case htons(ETH_P_IPV6): 1151 return ipv6_addr_any(&ip->src.ip6); 1152 #endif 1153 default: 1154 return false; 1155 } 1156 } 1157 1158 static inline bool 1159 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1160 __be16 proto) 1161 { 1162 switch (proto) { 1163 case htons(ETH_P_IP): 1164 return !!(brmctx->multicast_igmp_version == 3); 1165 #if IS_ENABLED(CONFIG_IPV6) 1166 case htons(ETH_P_IPV6): 1167 return !!(brmctx->multicast_mld_version == 2); 1168 #endif 1169 default: 1170 return false; 1171 } 1172 } 1173 1174 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1175 { 1176 return BR_INPUT_SKB_CB(skb)->igmp; 1177 } 1178 1179 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1180 { 1181 return brmctx->multicast_last_member_interval * 1182 brmctx->multicast_last_member_count; 1183 } 1184 1185 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1186 { 1187 return brmctx->multicast_membership_interval; 1188 } 1189 1190 static inline bool 1191 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1192 { 1193 return !!brmctx->vlan; 1194 } 1195 1196 static inline bool 1197 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1198 { 1199 return !!pmctx->vlan; 1200 } 1201 1202 static inline struct net_bridge_mcast * 1203 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1204 { 1205 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1206 return &pmctx->port->br->multicast_ctx; 1207 else 1208 return &pmctx->vlan->brvlan->br_mcast_ctx; 1209 } 1210 1211 static inline bool 1212 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1213 { 1214 return br_multicast_ctx_is_vlan(brmctx) && 1215 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1216 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1217 } 1218 1219 static inline bool 1220 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1221 { 1222 return br_multicast_ctx_is_vlan(brmctx) && 1223 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1224 } 1225 1226 static inline bool 1227 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1228 { 1229 return br_multicast_port_ctx_is_vlan(pmctx) && 1230 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1231 } 1232 1233 static inline bool 1234 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1235 { 1236 return pmctx->port->state == BR_STATE_DISABLED || 1237 (br_multicast_port_ctx_is_vlan(pmctx) && 1238 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1239 pmctx->vlan->state == BR_STATE_DISABLED)); 1240 } 1241 1242 static inline bool 1243 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1244 { 1245 return br_multicast_port_ctx_state_disabled(pmctx) || 1246 pmctx->port->state == BR_STATE_BLOCKING || 1247 (br_multicast_port_ctx_is_vlan(pmctx) && 1248 pmctx->vlan->state == BR_STATE_BLOCKING); 1249 } 1250 1251 static inline bool 1252 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1253 { 1254 #if IS_ENABLED(CONFIG_IPV6) 1255 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1256 !hlist_empty(&brmctx->ip6_mc_router_list); 1257 #else 1258 return !hlist_empty(&brmctx->ip4_mc_router_list); 1259 #endif 1260 } 1261 1262 static inline bool 1263 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1264 const struct net_bridge_mcast *brmctx2) 1265 { 1266 return brmctx1->multicast_igmp_version == 1267 brmctx2->multicast_igmp_version && 1268 brmctx1->multicast_last_member_count == 1269 brmctx2->multicast_last_member_count && 1270 brmctx1->multicast_startup_query_count == 1271 brmctx2->multicast_startup_query_count && 1272 brmctx1->multicast_last_member_interval == 1273 brmctx2->multicast_last_member_interval && 1274 brmctx1->multicast_membership_interval == 1275 brmctx2->multicast_membership_interval && 1276 brmctx1->multicast_querier_interval == 1277 brmctx2->multicast_querier_interval && 1278 brmctx1->multicast_query_interval == 1279 brmctx2->multicast_query_interval && 1280 brmctx1->multicast_query_response_interval == 1281 brmctx2->multicast_query_response_interval && 1282 brmctx1->multicast_startup_query_interval == 1283 brmctx2->multicast_startup_query_interval && 1284 brmctx1->multicast_querier == brmctx2->multicast_querier && 1285 brmctx1->multicast_router == brmctx2->multicast_router && 1286 !br_rports_have_mc_router(brmctx1) && 1287 !br_rports_have_mc_router(brmctx2) && 1288 #if IS_ENABLED(CONFIG_IPV6) 1289 brmctx1->multicast_mld_version == 1290 brmctx2->multicast_mld_version && 1291 #endif 1292 true; 1293 } 1294 1295 static inline bool 1296 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1297 { 1298 bool vlan_snooping_enabled; 1299 1300 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1301 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1302 1303 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1304 } 1305 #else 1306 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1307 struct net_bridge_mcast_port **pmctx, 1308 struct net_bridge_vlan *vlan, 1309 struct sk_buff *skb, 1310 u16 vid) 1311 { 1312 return 0; 1313 } 1314 1315 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1316 struct sk_buff *skb, u16 vid) 1317 { 1318 return NULL; 1319 } 1320 1321 static inline int br_multicast_add_port(struct net_bridge_port *port) 1322 { 1323 return 0; 1324 } 1325 1326 static inline void br_multicast_del_port(struct net_bridge_port *port) 1327 { 1328 } 1329 1330 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1331 { 1332 } 1333 1334 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1335 { 1336 } 1337 1338 static inline void br_multicast_init(struct net_bridge *br) 1339 { 1340 } 1341 1342 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1343 { 1344 } 1345 1346 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1347 { 1348 } 1349 1350 static inline void br_multicast_open(struct net_bridge *br) 1351 { 1352 } 1353 1354 static inline void br_multicast_stop(struct net_bridge *br) 1355 { 1356 } 1357 1358 static inline void br_multicast_dev_del(struct net_bridge *br) 1359 { 1360 } 1361 1362 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1363 struct sk_buff *skb, 1364 struct net_bridge_mcast *brmctx, 1365 bool local_rcv, bool local_orig) 1366 { 1367 } 1368 1369 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1370 struct sk_buff *skb) 1371 { 1372 return false; 1373 } 1374 1375 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1376 struct ethhdr *eth, 1377 const struct net_bridge_mdb_entry *mdb) 1378 { 1379 return false; 1380 } 1381 1382 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1383 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1384 { 1385 return -EOPNOTSUPP; 1386 } 1387 1388 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1389 struct netlink_ext_ack *extack) 1390 { 1391 return -EOPNOTSUPP; 1392 } 1393 1394 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1395 struct netlink_callback *cb) 1396 { 1397 return 0; 1398 } 1399 1400 static inline int br_mdb_hash_init(struct net_bridge *br) 1401 { 1402 return 0; 1403 } 1404 1405 static inline void br_mdb_hash_fini(struct net_bridge *br) 1406 { 1407 } 1408 1409 static inline void br_multicast_count(struct net_bridge *br, 1410 const struct net_bridge_port *p, 1411 const struct sk_buff *skb, 1412 u8 type, u8 dir) 1413 { 1414 } 1415 1416 static inline int br_multicast_init_stats(struct net_bridge *br) 1417 { 1418 return 0; 1419 } 1420 1421 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1422 { 1423 } 1424 1425 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1426 { 1427 return 0; 1428 } 1429 1430 static inline void br_multicast_ctx_init(struct net_bridge *br, 1431 struct net_bridge_vlan *vlan, 1432 struct net_bridge_mcast *brmctx) 1433 { 1434 } 1435 1436 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1437 { 1438 } 1439 1440 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1441 struct net_bridge_vlan *vlan, 1442 struct net_bridge_mcast_port *pmctx) 1443 { 1444 } 1445 1446 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1447 { 1448 } 1449 1450 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1451 bool on) 1452 { 1453 } 1454 1455 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1456 bool on, 1457 struct netlink_ext_ack *extack) 1458 { 1459 return -EOPNOTSUPP; 1460 } 1461 1462 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1463 bool on) 1464 { 1465 return false; 1466 } 1467 1468 static inline bool 1469 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1470 const struct net_bridge_mcast *brmctx2) 1471 { 1472 return true; 1473 } 1474 #endif 1475 1476 /* br_vlan.c */ 1477 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1478 bool br_allowed_ingress(const struct net_bridge *br, 1479 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1480 u16 *vid, u8 *state, 1481 struct net_bridge_vlan **vlan); 1482 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1483 const struct sk_buff *skb); 1484 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1485 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1486 const struct net_bridge_port *port, 1487 struct net_bridge_vlan_group *vg, 1488 struct sk_buff *skb); 1489 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1490 bool *changed, struct netlink_ext_ack *extack); 1491 int br_vlan_delete(struct net_bridge *br, u16 vid); 1492 void br_vlan_flush(struct net_bridge *br); 1493 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1494 void br_recalculate_fwd_mask(struct net_bridge *br); 1495 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1496 struct netlink_ext_ack *extack); 1497 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1498 struct netlink_ext_ack *extack); 1499 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1500 struct netlink_ext_ack *extack); 1501 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1502 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1503 int br_vlan_init(struct net_bridge *br); 1504 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1505 struct netlink_ext_ack *extack); 1506 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1507 struct netlink_ext_ack *extack); 1508 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1509 bool *changed, struct netlink_ext_ack *extack); 1510 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1511 void nbp_vlan_flush(struct net_bridge_port *port); 1512 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1513 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1514 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1515 struct pcpu_sw_netstats *stats); 1516 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1517 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1518 void *ptr); 1519 void br_vlan_rtnl_init(void); 1520 void br_vlan_rtnl_uninit(void); 1521 void br_vlan_notify(const struct net_bridge *br, 1522 const struct net_bridge_port *p, 1523 u16 vid, u16 vid_range, 1524 int cmd); 1525 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1526 const struct net_bridge_vlan *range_end); 1527 1528 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1529 struct net_device_path_ctx *ctx, 1530 struct net_device_path *path); 1531 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1532 struct net_bridge_port *dst, 1533 struct net_device_path *path); 1534 1535 static inline struct net_bridge_vlan_group *br_vlan_group( 1536 const struct net_bridge *br) 1537 { 1538 return rtnl_dereference(br->vlgrp); 1539 } 1540 1541 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1542 const struct net_bridge_port *p) 1543 { 1544 return rtnl_dereference(p->vlgrp); 1545 } 1546 1547 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1548 const struct net_bridge *br) 1549 { 1550 return rcu_dereference(br->vlgrp); 1551 } 1552 1553 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1554 const struct net_bridge_port *p) 1555 { 1556 return rcu_dereference(p->vlgrp); 1557 } 1558 1559 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1560 * skb, the vlan tag will always be present if the frame was tagged. 1561 */ 1562 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1563 { 1564 int err = 0; 1565 1566 if (skb_vlan_tag_present(skb)) { 1567 *vid = skb_vlan_tag_get_id(skb); 1568 } else { 1569 *vid = 0; 1570 err = -EINVAL; 1571 } 1572 1573 return err; 1574 } 1575 1576 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1577 { 1578 if (!vg) 1579 return 0; 1580 1581 smp_rmb(); 1582 return vg->pvid; 1583 } 1584 1585 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1586 { 1587 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1588 } 1589 #else 1590 static inline bool br_allowed_ingress(const struct net_bridge *br, 1591 struct net_bridge_vlan_group *vg, 1592 struct sk_buff *skb, 1593 u16 *vid, u8 *state, 1594 struct net_bridge_vlan **vlan) 1595 1596 { 1597 *vlan = NULL; 1598 return true; 1599 } 1600 1601 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1602 const struct sk_buff *skb) 1603 { 1604 return true; 1605 } 1606 1607 static inline bool br_should_learn(struct net_bridge_port *p, 1608 struct sk_buff *skb, u16 *vid) 1609 { 1610 return true; 1611 } 1612 1613 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1614 const struct net_bridge_port *port, 1615 struct net_bridge_vlan_group *vg, 1616 struct sk_buff *skb) 1617 { 1618 return skb; 1619 } 1620 1621 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1622 bool *changed, struct netlink_ext_ack *extack) 1623 { 1624 *changed = false; 1625 return -EOPNOTSUPP; 1626 } 1627 1628 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1629 { 1630 return -EOPNOTSUPP; 1631 } 1632 1633 static inline void br_vlan_flush(struct net_bridge *br) 1634 { 1635 } 1636 1637 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1638 { 1639 } 1640 1641 static inline int br_vlan_init(struct net_bridge *br) 1642 { 1643 return 0; 1644 } 1645 1646 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1647 bool *changed, struct netlink_ext_ack *extack) 1648 { 1649 *changed = false; 1650 return -EOPNOTSUPP; 1651 } 1652 1653 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1654 { 1655 return -EOPNOTSUPP; 1656 } 1657 1658 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1659 { 1660 } 1661 1662 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1663 u16 vid) 1664 { 1665 return NULL; 1666 } 1667 1668 static inline int nbp_vlan_init(struct net_bridge_port *port, 1669 struct netlink_ext_ack *extack) 1670 { 1671 return 0; 1672 } 1673 1674 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1675 { 1676 return 0; 1677 } 1678 1679 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1680 { 1681 return 0; 1682 } 1683 1684 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1685 unsigned long val, 1686 struct netlink_ext_ack *extack) 1687 { 1688 return -EOPNOTSUPP; 1689 } 1690 1691 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1692 u32 filter_mask) 1693 { 1694 return 0; 1695 } 1696 1697 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1698 struct net_device_path_ctx *ctx, 1699 struct net_device_path *path) 1700 { 1701 } 1702 1703 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1704 struct net_bridge_port *dst, 1705 struct net_device_path *path) 1706 { 1707 return 0; 1708 } 1709 1710 static inline struct net_bridge_vlan_group *br_vlan_group( 1711 const struct net_bridge *br) 1712 { 1713 return NULL; 1714 } 1715 1716 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1717 const struct net_bridge_port *p) 1718 { 1719 return NULL; 1720 } 1721 1722 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1723 const struct net_bridge *br) 1724 { 1725 return NULL; 1726 } 1727 1728 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1729 const struct net_bridge_port *p) 1730 { 1731 return NULL; 1732 } 1733 1734 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1735 struct pcpu_sw_netstats *stats) 1736 { 1737 } 1738 1739 static inline void br_vlan_port_event(struct net_bridge_port *p, 1740 unsigned long event) 1741 { 1742 } 1743 1744 static inline int br_vlan_bridge_event(struct net_device *dev, 1745 unsigned long event, void *ptr) 1746 { 1747 return 0; 1748 } 1749 1750 static inline void br_vlan_rtnl_init(void) 1751 { 1752 } 1753 1754 static inline void br_vlan_rtnl_uninit(void) 1755 { 1756 } 1757 1758 static inline void br_vlan_notify(const struct net_bridge *br, 1759 const struct net_bridge_port *p, 1760 u16 vid, u16 vid_range, 1761 int cmd) 1762 { 1763 } 1764 1765 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1766 const struct net_bridge_vlan *range_end) 1767 { 1768 return true; 1769 } 1770 1771 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1772 { 1773 return 0; 1774 } 1775 1776 #endif 1777 1778 /* br_vlan_options.c */ 1779 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1780 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1781 const struct net_bridge_vlan *range_end); 1782 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1783 const struct net_bridge_port *p); 1784 size_t br_vlan_opts_nl_size(void); 1785 int br_vlan_process_options(const struct net_bridge *br, 1786 const struct net_bridge_port *p, 1787 struct net_bridge_vlan *range_start, 1788 struct net_bridge_vlan *range_end, 1789 struct nlattr **tb, 1790 struct netlink_ext_ack *extack); 1791 int br_vlan_rtm_process_global_options(struct net_device *dev, 1792 const struct nlattr *attr, 1793 int cmd, 1794 struct netlink_ext_ack *extack); 1795 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1796 const struct net_bridge_vlan *r_end); 1797 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1798 const struct net_bridge_vlan *v_opts); 1799 1800 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1801 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1802 { 1803 return READ_ONCE(v->state); 1804 } 1805 1806 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1807 { 1808 WRITE_ONCE(v->state, state); 1809 } 1810 1811 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1812 { 1813 return READ_ONCE(vg->pvid_state); 1814 } 1815 1816 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1817 u8 state) 1818 { 1819 WRITE_ONCE(vg->pvid_state, state); 1820 } 1821 1822 /* learn_allow is true at ingress and false at egress */ 1823 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1824 { 1825 switch (state) { 1826 case BR_STATE_LEARNING: 1827 return learn_allow; 1828 case BR_STATE_FORWARDING: 1829 return true; 1830 default: 1831 return false; 1832 } 1833 } 1834 #endif 1835 1836 /* br_mst.c */ 1837 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1838 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1839 static inline bool br_mst_is_enabled(struct net_bridge *br) 1840 { 1841 return static_branch_unlikely(&br_mst_used) && 1842 br_opt_get(br, BROPT_MST_ENABLED); 1843 } 1844 1845 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1846 struct netlink_ext_ack *extack); 1847 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1848 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1849 int br_mst_set_enabled(struct net_bridge *br, bool on, 1850 struct netlink_ext_ack *extack); 1851 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1852 int br_mst_fill_info(struct sk_buff *skb, 1853 const struct net_bridge_vlan_group *vg); 1854 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1855 struct netlink_ext_ack *extack); 1856 #else 1857 static inline bool br_mst_is_enabled(struct net_bridge *br) 1858 { 1859 return false; 1860 } 1861 1862 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1863 u8 state, struct netlink_ext_ack *extack) 1864 { 1865 return -EOPNOTSUPP; 1866 } 1867 1868 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1869 struct netlink_ext_ack *extack) 1870 { 1871 return -EOPNOTSUPP; 1872 } 1873 1874 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1875 { 1876 return 0; 1877 } 1878 1879 static inline int br_mst_fill_info(struct sk_buff *skb, 1880 const struct net_bridge_vlan_group *vg) 1881 { 1882 return -EOPNOTSUPP; 1883 } 1884 1885 static inline int br_mst_process(struct net_bridge_port *p, 1886 const struct nlattr *mst_attr, 1887 struct netlink_ext_ack *extack) 1888 { 1889 return -EOPNOTSUPP; 1890 } 1891 #endif 1892 1893 struct nf_br_ops { 1894 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1895 }; 1896 extern const struct nf_br_ops __rcu *nf_br_ops; 1897 1898 /* br_netfilter.c */ 1899 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1900 int br_nf_core_init(void); 1901 void br_nf_core_fini(void); 1902 void br_netfilter_rtable_init(struct net_bridge *); 1903 #else 1904 static inline int br_nf_core_init(void) { return 0; } 1905 static inline void br_nf_core_fini(void) {} 1906 #define br_netfilter_rtable_init(x) 1907 #endif 1908 1909 /* br_stp.c */ 1910 void br_set_state(struct net_bridge_port *p, unsigned int state); 1911 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1912 void br_init_port(struct net_bridge_port *p); 1913 void br_become_designated_port(struct net_bridge_port *p); 1914 1915 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1916 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1917 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1918 int br_set_max_age(struct net_bridge *br, unsigned long x); 1919 int __set_ageing_time(struct net_device *dev, unsigned long t); 1920 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1921 1922 1923 /* br_stp_if.c */ 1924 void br_stp_enable_bridge(struct net_bridge *br); 1925 void br_stp_disable_bridge(struct net_bridge *br); 1926 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1927 struct netlink_ext_ack *extack); 1928 void br_stp_enable_port(struct net_bridge_port *p); 1929 void br_stp_disable_port(struct net_bridge_port *p); 1930 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1931 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1932 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1933 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1934 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1935 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1936 1937 /* br_stp_bpdu.c */ 1938 struct stp_proto; 1939 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1940 struct net_device *dev); 1941 1942 /* br_stp_timer.c */ 1943 void br_stp_timer_init(struct net_bridge *br); 1944 void br_stp_port_timer_init(struct net_bridge_port *p); 1945 unsigned long br_timer_value(const struct timer_list *timer); 1946 1947 /* br.c */ 1948 #if IS_ENABLED(CONFIG_ATM_LANE) 1949 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1950 #endif 1951 1952 /* br_mrp.c */ 1953 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1954 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1955 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1956 bool br_mrp_enabled(struct net_bridge *br); 1957 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1958 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1959 #else 1960 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1961 struct nlattr *attr, int cmd, 1962 struct netlink_ext_ack *extack) 1963 { 1964 return -EOPNOTSUPP; 1965 } 1966 1967 static inline bool br_mrp_enabled(struct net_bridge *br) 1968 { 1969 return false; 1970 } 1971 1972 static inline void br_mrp_port_del(struct net_bridge *br, 1973 struct net_bridge_port *p) 1974 { 1975 } 1976 1977 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1978 { 1979 return 0; 1980 } 1981 1982 #endif 1983 1984 /* br_cfm.c */ 1985 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1986 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1987 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1988 bool br_cfm_created(struct net_bridge *br); 1989 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1990 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1991 int br_cfm_status_fill_info(struct sk_buff *skb, 1992 struct net_bridge *br, 1993 bool getlink); 1994 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1995 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1996 #else 1997 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1998 struct nlattr *attr, int cmd, 1999 struct netlink_ext_ack *extack) 2000 { 2001 return -EOPNOTSUPP; 2002 } 2003 2004 static inline bool br_cfm_created(struct net_bridge *br) 2005 { 2006 return false; 2007 } 2008 2009 static inline void br_cfm_port_del(struct net_bridge *br, 2010 struct net_bridge_port *p) 2011 { 2012 } 2013 2014 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2015 { 2016 return -EOPNOTSUPP; 2017 } 2018 2019 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2020 struct net_bridge *br, 2021 bool getlink) 2022 { 2023 return -EOPNOTSUPP; 2024 } 2025 2026 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2027 { 2028 *count = 0; 2029 return -EOPNOTSUPP; 2030 } 2031 2032 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2033 { 2034 *count = 0; 2035 return -EOPNOTSUPP; 2036 } 2037 #endif 2038 2039 /* br_netlink.c */ 2040 extern struct rtnl_link_ops br_link_ops; 2041 int br_netlink_init(void); 2042 void br_netlink_fini(void); 2043 void br_ifinfo_notify(int event, const struct net_bridge *br, 2044 const struct net_bridge_port *port); 2045 void br_info_notify(int event, const struct net_bridge *br, 2046 const struct net_bridge_port *port, u32 filter); 2047 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2048 struct netlink_ext_ack *extack); 2049 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2050 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2051 u32 filter_mask, int nlflags); 2052 int br_process_vlan_info(struct net_bridge *br, 2053 struct net_bridge_port *p, int cmd, 2054 struct bridge_vlan_info *vinfo_curr, 2055 struct bridge_vlan_info **vinfo_last, 2056 bool *changed, 2057 struct netlink_ext_ack *extack); 2058 2059 #ifdef CONFIG_SYSFS 2060 /* br_sysfs_if.c */ 2061 extern const struct sysfs_ops brport_sysfs_ops; 2062 int br_sysfs_addif(struct net_bridge_port *p); 2063 int br_sysfs_renameif(struct net_bridge_port *p); 2064 2065 /* br_sysfs_br.c */ 2066 int br_sysfs_addbr(struct net_device *dev); 2067 void br_sysfs_delbr(struct net_device *dev); 2068 2069 #else 2070 2071 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2072 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2073 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2074 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2075 #endif /* CONFIG_SYSFS */ 2076 2077 /* br_switchdev.c */ 2078 #ifdef CONFIG_NET_SWITCHDEV 2079 int br_switchdev_port_offload(struct net_bridge_port *p, 2080 struct net_device *dev, const void *ctx, 2081 struct notifier_block *atomic_nb, 2082 struct notifier_block *blocking_nb, 2083 bool tx_fwd_offload, 2084 struct netlink_ext_ack *extack); 2085 2086 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2087 struct notifier_block *atomic_nb, 2088 struct notifier_block *blocking_nb); 2089 2090 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2091 2092 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2093 2094 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2095 struct sk_buff *skb); 2096 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2097 struct sk_buff *skb); 2098 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2099 struct sk_buff *skb); 2100 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2101 const struct sk_buff *skb); 2102 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2103 unsigned long flags, 2104 unsigned long mask, 2105 struct netlink_ext_ack *extack); 2106 void br_switchdev_fdb_notify(struct net_bridge *br, 2107 const struct net_bridge_fdb_entry *fdb, int type); 2108 void br_switchdev_mdb_notify(struct net_device *dev, 2109 struct net_bridge_mdb_entry *mp, 2110 struct net_bridge_port_group *pg, 2111 int type); 2112 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2113 bool changed, struct netlink_ext_ack *extack); 2114 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2115 void br_switchdev_init(struct net_bridge *br); 2116 2117 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2118 { 2119 skb->offload_fwd_mark = 0; 2120 } 2121 #else 2122 static inline int 2123 br_switchdev_port_offload(struct net_bridge_port *p, 2124 struct net_device *dev, const void *ctx, 2125 struct notifier_block *atomic_nb, 2126 struct notifier_block *blocking_nb, 2127 bool tx_fwd_offload, 2128 struct netlink_ext_ack *extack) 2129 { 2130 return -EOPNOTSUPP; 2131 } 2132 2133 static inline void 2134 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2135 struct notifier_block *atomic_nb, 2136 struct notifier_block *blocking_nb) 2137 { 2138 } 2139 2140 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2141 { 2142 return false; 2143 } 2144 2145 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2146 { 2147 } 2148 2149 static inline void 2150 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2151 struct sk_buff *skb) 2152 { 2153 } 2154 2155 static inline void 2156 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2157 struct sk_buff *skb) 2158 { 2159 } 2160 2161 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2162 struct sk_buff *skb) 2163 { 2164 } 2165 2166 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2167 const struct sk_buff *skb) 2168 { 2169 return true; 2170 } 2171 2172 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2173 unsigned long flags, 2174 unsigned long mask, 2175 struct netlink_ext_ack *extack) 2176 { 2177 return 0; 2178 } 2179 2180 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2181 u16 flags, bool changed, 2182 struct netlink_ext_ack *extack) 2183 { 2184 return -EOPNOTSUPP; 2185 } 2186 2187 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2188 { 2189 return -EOPNOTSUPP; 2190 } 2191 2192 static inline void 2193 br_switchdev_fdb_notify(struct net_bridge *br, 2194 const struct net_bridge_fdb_entry *fdb, int type) 2195 { 2196 } 2197 2198 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2199 struct net_bridge_mdb_entry *mp, 2200 struct net_bridge_port_group *pg, 2201 int type) 2202 { 2203 } 2204 2205 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2206 { 2207 } 2208 2209 static inline void br_switchdev_init(struct net_bridge *br) 2210 { 2211 } 2212 2213 #endif /* CONFIG_NET_SWITCHDEV */ 2214 2215 /* br_arp_nd_proxy.c */ 2216 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2217 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2218 u16 vid, struct net_bridge_port *p); 2219 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2220 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2221 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2222 #endif 2223