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