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