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 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 93 struct net_bridge_mcast_port { 94 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 95 struct net_bridge_port *port; 96 struct net_bridge_vlan *vlan; 97 98 struct bridge_mcast_own_query ip4_own_query; 99 struct timer_list ip4_mc_router_timer; 100 struct hlist_node ip4_rlist; 101 #if IS_ENABLED(CONFIG_IPV6) 102 struct bridge_mcast_own_query ip6_own_query; 103 struct timer_list ip6_mc_router_timer; 104 struct hlist_node ip6_rlist; 105 #endif /* IS_ENABLED(CONFIG_IPV6) */ 106 unsigned char multicast_router; 107 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 108 }; 109 110 /* net_bridge_mcast must be always defined due to forwarding stubs */ 111 struct net_bridge_mcast { 112 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 113 struct net_bridge *br; 114 struct net_bridge_vlan *vlan; 115 116 u32 multicast_last_member_count; 117 u32 multicast_startup_query_count; 118 119 u8 multicast_igmp_version; 120 u8 multicast_router; 121 #if IS_ENABLED(CONFIG_IPV6) 122 u8 multicast_mld_version; 123 #endif 124 unsigned long multicast_last_member_interval; 125 unsigned long multicast_membership_interval; 126 unsigned long multicast_querier_interval; 127 unsigned long multicast_query_interval; 128 unsigned long multicast_query_response_interval; 129 unsigned long multicast_startup_query_interval; 130 struct hlist_head ip4_mc_router_list; 131 struct timer_list ip4_mc_router_timer; 132 struct bridge_mcast_other_query ip4_other_query; 133 struct bridge_mcast_own_query ip4_own_query; 134 struct bridge_mcast_querier ip4_querier; 135 #if IS_ENABLED(CONFIG_IPV6) 136 struct hlist_head ip6_mc_router_list; 137 struct timer_list ip6_mc_router_timer; 138 struct bridge_mcast_other_query ip6_other_query; 139 struct bridge_mcast_own_query ip6_own_query; 140 struct bridge_mcast_querier ip6_querier; 141 #endif /* IS_ENABLED(CONFIG_IPV6) */ 142 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 143 }; 144 145 struct br_tunnel_info { 146 __be64 tunnel_id; 147 struct metadata_dst __rcu *tunnel_dst; 148 }; 149 150 /* private vlan flags */ 151 enum { 152 BR_VLFLAG_PER_PORT_STATS = BIT(0), 153 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 154 BR_VLFLAG_MCAST_ENABLED = BIT(2), 155 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 156 }; 157 158 /** 159 * struct net_bridge_vlan - per-vlan entry 160 * 161 * @vnode: rhashtable member 162 * @vid: VLAN id 163 * @flags: bridge vlan flags 164 * @priv_flags: private (in-kernel) bridge vlan flags 165 * @state: STP state (e.g. blocking, learning, forwarding) 166 * @stats: per-cpu VLAN statistics 167 * @br: if MASTER flag set, this points to a bridge struct 168 * @port: if MASTER flag unset, this points to a port struct 169 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 170 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 171 * for this VLAN entry 172 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 173 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 174 * context 175 * @vlist: sorted list of VLAN entries 176 * @rcu: used for entry destruction 177 * 178 * This structure is shared between the global per-VLAN entries contained in 179 * the bridge rhashtable and the local per-port per-VLAN entries contained in 180 * the port's rhashtable. The union entries should be interpreted depending on 181 * the entry flags that are set. 182 */ 183 struct net_bridge_vlan { 184 struct rhash_head vnode; 185 struct rhash_head tnode; 186 u16 vid; 187 u16 flags; 188 u16 priv_flags; 189 u8 state; 190 struct pcpu_sw_netstats __percpu *stats; 191 union { 192 struct net_bridge *br; 193 struct net_bridge_port *port; 194 }; 195 union { 196 refcount_t refcnt; 197 struct net_bridge_vlan *brvlan; 198 }; 199 200 struct br_tunnel_info tinfo; 201 202 union { 203 struct net_bridge_mcast br_mcast_ctx; 204 struct net_bridge_mcast_port port_mcast_ctx; 205 }; 206 207 struct list_head vlist; 208 209 struct rcu_head rcu; 210 }; 211 212 /** 213 * struct net_bridge_vlan_group 214 * 215 * @vlan_hash: VLAN entry rhashtable 216 * @vlan_list: sorted VLAN entry list 217 * @num_vlans: number of total VLAN entries 218 * @pvid: PVID VLAN id 219 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 220 * 221 * IMPORTANT: Be careful when checking if there're VLAN entries using list 222 * primitives because the bridge can have entries in its list which 223 * are just for global context but not for filtering, i.e. they have 224 * the master flag set but not the brentry flag. If you have to check 225 * if there're "real" entries in the bridge please test @num_vlans 226 */ 227 struct net_bridge_vlan_group { 228 struct rhashtable vlan_hash; 229 struct rhashtable tunnel_hash; 230 struct list_head vlan_list; 231 u16 num_vlans; 232 u16 pvid; 233 u8 pvid_state; 234 }; 235 236 /* bridge fdb flags */ 237 enum { 238 BR_FDB_LOCAL, 239 BR_FDB_STATIC, 240 BR_FDB_STICKY, 241 BR_FDB_ADDED_BY_USER, 242 BR_FDB_ADDED_BY_EXT_LEARN, 243 BR_FDB_OFFLOADED, 244 BR_FDB_NOTIFY, 245 BR_FDB_NOTIFY_INACTIVE 246 }; 247 248 struct net_bridge_fdb_key { 249 mac_addr addr; 250 u16 vlan_id; 251 }; 252 253 struct net_bridge_fdb_entry { 254 struct rhash_head rhnode; 255 struct net_bridge_port *dst; 256 257 struct net_bridge_fdb_key key; 258 struct hlist_node fdb_node; 259 unsigned long flags; 260 261 /* write-heavy members should not affect lookups */ 262 unsigned long updated ____cacheline_aligned_in_smp; 263 unsigned long used; 264 265 struct rcu_head rcu; 266 }; 267 268 #define MDB_PG_FLAGS_PERMANENT BIT(0) 269 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 270 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 271 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 272 #define MDB_PG_FLAGS_BLOCKED BIT(4) 273 274 #define PG_SRC_ENT_LIMIT 32 275 276 #define BR_SGRP_F_DELETE BIT(0) 277 #define BR_SGRP_F_SEND BIT(1) 278 #define BR_SGRP_F_INSTALLED BIT(2) 279 280 struct net_bridge_mcast_gc { 281 struct hlist_node gc_node; 282 void (*destroy)(struct net_bridge_mcast_gc *gc); 283 }; 284 285 struct net_bridge_group_src { 286 struct hlist_node node; 287 288 struct br_ip addr; 289 struct net_bridge_port_group *pg; 290 u8 flags; 291 u8 src_query_rexmit_cnt; 292 struct timer_list timer; 293 294 struct net_bridge *br; 295 struct net_bridge_mcast_gc mcast_gc; 296 struct rcu_head rcu; 297 }; 298 299 struct net_bridge_port_group_sg_key { 300 struct net_bridge_port *port; 301 struct br_ip addr; 302 }; 303 304 struct net_bridge_port_group { 305 struct net_bridge_port_group __rcu *next; 306 struct net_bridge_port_group_sg_key key; 307 unsigned char eth_addr[ETH_ALEN] __aligned(2); 308 unsigned char flags; 309 unsigned char filter_mode; 310 unsigned char grp_query_rexmit_cnt; 311 unsigned char rt_protocol; 312 313 struct hlist_head src_list; 314 unsigned int src_ents; 315 struct timer_list timer; 316 struct timer_list rexmit_timer; 317 struct hlist_node mglist; 318 struct rb_root eht_set_tree; 319 struct rb_root eht_host_tree; 320 321 struct rhash_head rhnode; 322 struct net_bridge_mcast_gc mcast_gc; 323 struct rcu_head rcu; 324 }; 325 326 struct net_bridge_mdb_entry { 327 struct rhash_head rhnode; 328 struct net_bridge *br; 329 struct net_bridge_port_group __rcu *ports; 330 struct br_ip addr; 331 bool host_joined; 332 333 struct timer_list timer; 334 struct hlist_node mdb_node; 335 336 struct net_bridge_mcast_gc mcast_gc; 337 struct rcu_head rcu; 338 }; 339 340 struct net_bridge_port { 341 struct net_bridge *br; 342 struct net_device *dev; 343 struct list_head list; 344 345 unsigned long flags; 346 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 347 struct net_bridge_vlan_group __rcu *vlgrp; 348 #endif 349 struct net_bridge_port __rcu *backup_port; 350 351 /* STP */ 352 u8 priority; 353 u8 state; 354 u16 port_no; 355 unsigned char topology_change_ack; 356 unsigned char config_pending; 357 port_id port_id; 358 port_id designated_port; 359 bridge_id designated_root; 360 bridge_id designated_bridge; 361 u32 path_cost; 362 u32 designated_cost; 363 unsigned long designated_age; 364 365 struct timer_list forward_delay_timer; 366 struct timer_list hold_timer; 367 struct timer_list message_age_timer; 368 struct kobject kobj; 369 struct rcu_head rcu; 370 371 struct net_bridge_mcast_port multicast_ctx; 372 373 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 374 struct bridge_mcast_stats __percpu *mcast_stats; 375 376 u32 multicast_eht_hosts_limit; 377 u32 multicast_eht_hosts_cnt; 378 struct hlist_head mglist; 379 #endif 380 381 #ifdef CONFIG_SYSFS 382 char sysfs_name[IFNAMSIZ]; 383 #endif 384 385 #ifdef CONFIG_NET_POLL_CONTROLLER 386 struct netpoll *np; 387 #endif 388 #ifdef CONFIG_NET_SWITCHDEV 389 int offload_fwd_mark; 390 #endif 391 u16 group_fwd_mask; 392 u16 backup_redirected_cnt; 393 394 struct bridge_stp_xstats stp_xstats; 395 }; 396 397 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 398 399 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 400 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 401 402 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 403 { 404 return rcu_dereference(dev->rx_handler_data); 405 } 406 407 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 408 { 409 return netif_is_bridge_port(dev) ? 410 rtnl_dereference(dev->rx_handler_data) : NULL; 411 } 412 413 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 414 { 415 return netif_is_bridge_port(dev) ? 416 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 417 } 418 419 enum net_bridge_opts { 420 BROPT_VLAN_ENABLED, 421 BROPT_VLAN_STATS_ENABLED, 422 BROPT_NF_CALL_IPTABLES, 423 BROPT_NF_CALL_IP6TABLES, 424 BROPT_NF_CALL_ARPTABLES, 425 BROPT_GROUP_ADDR_SET, 426 BROPT_MULTICAST_ENABLED, 427 BROPT_MULTICAST_QUERIER, 428 BROPT_MULTICAST_QUERY_USE_IFADDR, 429 BROPT_MULTICAST_STATS_ENABLED, 430 BROPT_HAS_IPV6_ADDR, 431 BROPT_NEIGH_SUPPRESS_ENABLED, 432 BROPT_MTU_SET_BY_USER, 433 BROPT_VLAN_STATS_PER_PORT, 434 BROPT_NO_LL_LEARN, 435 BROPT_VLAN_BRIDGE_BINDING, 436 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 437 }; 438 439 struct net_bridge { 440 spinlock_t lock; 441 spinlock_t hash_lock; 442 struct hlist_head frame_type_list; 443 struct net_device *dev; 444 unsigned long options; 445 /* These fields are accessed on each packet */ 446 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 447 __be16 vlan_proto; 448 u16 default_pvid; 449 struct net_bridge_vlan_group __rcu *vlgrp; 450 #endif 451 452 struct rhashtable fdb_hash_tbl; 453 struct list_head port_list; 454 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 455 union { 456 struct rtable fake_rtable; 457 struct rt6_info fake_rt6_info; 458 }; 459 #endif 460 u16 group_fwd_mask; 461 u16 group_fwd_mask_required; 462 463 /* STP */ 464 bridge_id designated_root; 465 bridge_id bridge_id; 466 unsigned char topology_change; 467 unsigned char topology_change_detected; 468 u16 root_port; 469 unsigned long max_age; 470 unsigned long hello_time; 471 unsigned long forward_delay; 472 unsigned long ageing_time; 473 unsigned long bridge_max_age; 474 unsigned long bridge_hello_time; 475 unsigned long bridge_forward_delay; 476 unsigned long bridge_ageing_time; 477 u32 root_path_cost; 478 479 u8 group_addr[ETH_ALEN]; 480 481 enum { 482 BR_NO_STP, /* no spanning tree */ 483 BR_KERNEL_STP, /* old STP in kernel */ 484 BR_USER_STP, /* new RSTP in userspace */ 485 } stp_enabled; 486 487 struct net_bridge_mcast multicast_ctx; 488 489 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 490 struct bridge_mcast_stats __percpu *mcast_stats; 491 492 u32 hash_max; 493 494 spinlock_t multicast_lock; 495 496 struct rhashtable mdb_hash_tbl; 497 struct rhashtable sg_port_tbl; 498 499 struct hlist_head mcast_gc_list; 500 struct hlist_head mdb_list; 501 502 struct work_struct mcast_gc_work; 503 #endif 504 505 struct timer_list hello_timer; 506 struct timer_list tcn_timer; 507 struct timer_list topology_change_timer; 508 struct delayed_work gc_work; 509 struct kobject *ifobj; 510 u32 auto_cnt; 511 512 #ifdef CONFIG_NET_SWITCHDEV 513 int offload_fwd_mark; 514 #endif 515 struct hlist_head fdb_list; 516 517 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 518 struct hlist_head mrp_list; 519 #endif 520 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 521 struct hlist_head mep_list; 522 #endif 523 }; 524 525 struct br_input_skb_cb { 526 struct net_device *brdev; 527 528 u16 frag_max_size; 529 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 530 u8 igmp; 531 u8 mrouters_only:1; 532 #endif 533 u8 proxyarp_replied:1; 534 u8 src_port_isolated:1; 535 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 536 u8 vlan_filtered:1; 537 #endif 538 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 539 u8 br_netfilter_broute:1; 540 #endif 541 542 #ifdef CONFIG_NET_SWITCHDEV 543 int offload_fwd_mark; 544 #endif 545 }; 546 547 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 548 549 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 550 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 551 #else 552 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 553 #endif 554 555 #define br_printk(level, br, format, args...) \ 556 printk(level "%s: " format, (br)->dev->name, ##args) 557 558 #define br_err(__br, format, args...) \ 559 br_printk(KERN_ERR, __br, format, ##args) 560 #define br_warn(__br, format, args...) \ 561 br_printk(KERN_WARNING, __br, format, ##args) 562 #define br_notice(__br, format, args...) \ 563 br_printk(KERN_NOTICE, __br, format, ##args) 564 #define br_info(__br, format, args...) \ 565 br_printk(KERN_INFO, __br, format, ##args) 566 567 #define br_debug(br, format, args...) \ 568 pr_debug("%s: " format, (br)->dev->name, ##args) 569 570 /* called under bridge lock */ 571 static inline int br_is_root_bridge(const struct net_bridge *br) 572 { 573 return !memcmp(&br->bridge_id, &br->designated_root, 8); 574 } 575 576 /* check if a VLAN entry is global */ 577 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 578 { 579 return v->flags & BRIDGE_VLAN_INFO_MASTER; 580 } 581 582 /* check if a VLAN entry is used by the bridge */ 583 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 584 { 585 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 586 } 587 588 /* check if we should use the vlan entry, returns false if it's only context */ 589 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 590 { 591 if (br_vlan_is_master(v)) { 592 if (br_vlan_is_brentry(v)) 593 return true; 594 else 595 return false; 596 } 597 598 return true; 599 } 600 601 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 602 { 603 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 604 } 605 606 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 607 { 608 bool ret = vid > 0 && vid < VLAN_VID_MASK; 609 610 if (!ret) 611 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 612 613 return ret; 614 } 615 616 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 617 const struct bridge_vlan_info *last, 618 struct netlink_ext_ack *extack) 619 { 620 /* pvid flag is not allowed in ranges */ 621 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 622 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 623 return false; 624 } 625 626 /* when cur is the range end, check if: 627 * - it has range start flag 628 * - range ids are invalid (end is equal to or before start) 629 */ 630 if (last) { 631 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 632 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 633 return false; 634 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 635 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 636 return false; 637 } else if (cur->vid <= last->vid) { 638 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 639 return false; 640 } 641 } 642 643 /* check for required range flags */ 644 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 645 BRIDGE_VLAN_INFO_RANGE_END))) { 646 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 647 return false; 648 } 649 650 return true; 651 } 652 653 static inline int br_afspec_cmd_to_rtm(int cmd) 654 { 655 switch (cmd) { 656 case RTM_SETLINK: 657 return RTM_NEWVLAN; 658 case RTM_DELLINK: 659 return RTM_DELVLAN; 660 } 661 662 return 0; 663 } 664 665 static inline int br_opt_get(const struct net_bridge *br, 666 enum net_bridge_opts opt) 667 { 668 return test_bit(opt, &br->options); 669 } 670 671 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 672 struct netlink_ext_ack *extack); 673 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 674 int br_boolopt_multi_toggle(struct net_bridge *br, 675 struct br_boolopt_multi *bm, 676 struct netlink_ext_ack *extack); 677 void br_boolopt_multi_get(const struct net_bridge *br, 678 struct br_boolopt_multi *bm); 679 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 680 681 /* br_device.c */ 682 void br_dev_setup(struct net_device *dev); 683 void br_dev_delete(struct net_device *dev, struct list_head *list); 684 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 685 #ifdef CONFIG_NET_POLL_CONTROLLER 686 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 687 struct sk_buff *skb) 688 { 689 netpoll_send_skb(p->np, skb); 690 } 691 692 int br_netpoll_enable(struct net_bridge_port *p); 693 void br_netpoll_disable(struct net_bridge_port *p); 694 #else 695 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 696 struct sk_buff *skb) 697 { 698 } 699 700 static inline int br_netpoll_enable(struct net_bridge_port *p) 701 { 702 return 0; 703 } 704 705 static inline void br_netpoll_disable(struct net_bridge_port *p) 706 { 707 } 708 #endif 709 710 /* br_fdb.c */ 711 int br_fdb_init(void); 712 void br_fdb_fini(void); 713 int br_fdb_hash_init(struct net_bridge *br); 714 void br_fdb_hash_fini(struct net_bridge *br); 715 void br_fdb_flush(struct net_bridge *br); 716 void br_fdb_find_delete_local(struct net_bridge *br, 717 const struct net_bridge_port *p, 718 const unsigned char *addr, u16 vid); 719 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 720 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 721 void br_fdb_cleanup(struct work_struct *work); 722 void br_fdb_delete_by_port(struct net_bridge *br, 723 const struct net_bridge_port *p, u16 vid, int do_all); 724 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 725 const unsigned char *addr, 726 __u16 vid); 727 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 728 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 729 unsigned long off); 730 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 731 const unsigned char *addr, u16 vid); 732 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 733 const unsigned char *addr, u16 vid, unsigned long flags); 734 735 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 736 struct net_device *dev, const unsigned char *addr, u16 vid); 737 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 738 const unsigned char *addr, u16 vid, u16 nlh_flags, 739 struct netlink_ext_ack *extack); 740 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 741 struct net_device *dev, struct net_device *fdev, int *idx); 742 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 743 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 744 struct netlink_ext_ack *extack); 745 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 746 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 747 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 748 const unsigned char *addr, u16 vid, 749 bool swdev_notify); 750 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 751 const unsigned char *addr, u16 vid, 752 bool swdev_notify); 753 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 754 const unsigned char *addr, u16 vid, bool offloaded); 755 756 /* br_forward.c */ 757 enum br_pkt_type { 758 BR_PKT_UNICAST, 759 BR_PKT_MULTICAST, 760 BR_PKT_BROADCAST 761 }; 762 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 763 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 764 bool local_rcv, bool local_orig); 765 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 766 void br_flood(struct net_bridge *br, struct sk_buff *skb, 767 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 768 769 /* return true if both source port and dest port are isolated */ 770 static inline bool br_skb_isolated(const struct net_bridge_port *to, 771 const struct sk_buff *skb) 772 { 773 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 774 (to->flags & BR_ISOLATED); 775 } 776 777 /* br_if.c */ 778 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 779 int br_add_bridge(struct net *net, const char *name); 780 int br_del_bridge(struct net *net, const char *name); 781 int br_add_if(struct net_bridge *br, struct net_device *dev, 782 struct netlink_ext_ack *extack); 783 int br_del_if(struct net_bridge *br, struct net_device *dev); 784 void br_mtu_auto_adjust(struct net_bridge *br); 785 netdev_features_t br_features_recompute(struct net_bridge *br, 786 netdev_features_t features); 787 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 788 void br_manage_promisc(struct net_bridge *br); 789 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 790 791 /* br_input.c */ 792 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 793 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 794 795 struct br_frame_type { 796 __be16 type; 797 int (*frame_handler)(struct net_bridge_port *port, 798 struct sk_buff *skb); 799 struct hlist_node list; 800 }; 801 802 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 803 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 804 805 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 806 { 807 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 808 } 809 810 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 811 { 812 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 813 } 814 815 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 816 { 817 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 818 } 819 820 static inline struct net_bridge_port * 821 br_port_get_check_rtnl(const struct net_device *dev) 822 { 823 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 824 } 825 826 /* br_ioctl.c */ 827 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 828 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 829 void __user *arg); 830 831 /* br_multicast.c */ 832 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 833 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 834 struct net_bridge_mcast_port **pmctx, 835 struct net_bridge_vlan *vlan, 836 struct sk_buff *skb, u16 vid); 837 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 838 struct sk_buff *skb, u16 vid); 839 int br_multicast_add_port(struct net_bridge_port *port); 840 void br_multicast_del_port(struct net_bridge_port *port); 841 void br_multicast_enable_port(struct net_bridge_port *port); 842 void br_multicast_disable_port(struct net_bridge_port *port); 843 void br_multicast_init(struct net_bridge *br); 844 void br_multicast_join_snoopers(struct net_bridge *br); 845 void br_multicast_leave_snoopers(struct net_bridge *br); 846 void br_multicast_open(struct net_bridge *br); 847 void br_multicast_stop(struct net_bridge *br); 848 void br_multicast_dev_del(struct net_bridge *br); 849 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 850 struct net_bridge_mcast *brmctx, 851 bool local_rcv, bool local_orig); 852 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 853 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 854 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 855 struct netlink_ext_ack *extack); 856 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 857 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 858 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 859 #if IS_ENABLED(CONFIG_IPV6) 860 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 861 #endif 862 struct net_bridge_mdb_entry * 863 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 864 struct net_bridge_mdb_entry * 865 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 866 struct net_bridge_port_group * 867 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 868 struct net_bridge_port_group __rcu *next, 869 unsigned char flags, const unsigned char *src, 870 u8 filter_mode, u8 rt_protocol); 871 int br_mdb_hash_init(struct net_bridge *br); 872 void br_mdb_hash_fini(struct net_bridge *br); 873 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 874 struct net_bridge_port_group *pg, int type); 875 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 876 int type); 877 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 878 struct net_bridge_port_group *pg, 879 struct net_bridge_port_group __rcu **pp); 880 void br_multicast_count(struct net_bridge *br, 881 const struct net_bridge_port *p, 882 const struct sk_buff *skb, u8 type, u8 dir); 883 int br_multicast_init_stats(struct net_bridge *br); 884 void br_multicast_uninit_stats(struct net_bridge *br); 885 void br_multicast_get_stats(const struct net_bridge *br, 886 const struct net_bridge_port *p, 887 struct br_mcast_stats *dest); 888 void br_mdb_init(void); 889 void br_mdb_uninit(void); 890 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 891 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 892 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 893 u8 filter_mode); 894 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 895 struct net_bridge_port_group *sg); 896 struct net_bridge_group_src * 897 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 898 void br_multicast_del_group_src(struct net_bridge_group_src *src, 899 bool fastleave); 900 void br_multicast_ctx_init(struct net_bridge *br, 901 struct net_bridge_vlan *vlan, 902 struct net_bridge_mcast *brmctx); 903 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 904 void br_multicast_port_ctx_init(struct net_bridge_port *port, 905 struct net_bridge_vlan *vlan, 906 struct net_bridge_mcast_port *pmctx); 907 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 908 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 909 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 910 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 911 struct netlink_ext_ack *extack); 912 913 static inline bool br_group_is_l2(const struct br_ip *group) 914 { 915 return group->proto == 0; 916 } 917 918 #define mlock_dereference(X, br) \ 919 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 920 921 static inline struct hlist_node * 922 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 923 struct sk_buff *skb) 924 { 925 #if IS_ENABLED(CONFIG_IPV6) 926 if (skb->protocol == htons(ETH_P_IPV6)) 927 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 928 #endif 929 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 930 } 931 932 static inline struct net_bridge_port * 933 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 934 { 935 struct net_bridge_mcast_port *mctx; 936 937 #if IS_ENABLED(CONFIG_IPV6) 938 if (skb->protocol == htons(ETH_P_IPV6)) 939 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 940 ip6_rlist); 941 else 942 #endif 943 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 944 ip4_rlist); 945 946 if (mctx) 947 return mctx->port; 948 else 949 return NULL; 950 } 951 952 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 953 { 954 return timer_pending(&brmctx->ip4_mc_router_timer); 955 } 956 957 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 958 { 959 #if IS_ENABLED(CONFIG_IPV6) 960 return timer_pending(&brmctx->ip6_mc_router_timer); 961 #else 962 return false; 963 #endif 964 } 965 966 static inline bool 967 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 968 { 969 switch (brmctx->multicast_router) { 970 case MDB_RTR_TYPE_PERM: 971 return true; 972 case MDB_RTR_TYPE_TEMP_QUERY: 973 if (skb) { 974 if (skb->protocol == htons(ETH_P_IP)) 975 return br_ip4_multicast_is_router(brmctx); 976 else if (skb->protocol == htons(ETH_P_IPV6)) 977 return br_ip6_multicast_is_router(brmctx); 978 } else { 979 return br_ip4_multicast_is_router(brmctx) || 980 br_ip6_multicast_is_router(brmctx); 981 } 982 fallthrough; 983 default: 984 return false; 985 } 986 } 987 988 static inline bool 989 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 990 struct bridge_mcast_other_query *querier, 991 const bool is_ipv6) 992 { 993 bool own_querier_enabled; 994 995 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 996 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 997 own_querier_enabled = false; 998 else 999 own_querier_enabled = true; 1000 } else { 1001 own_querier_enabled = false; 1002 } 1003 1004 return time_is_before_jiffies(querier->delay_time) && 1005 (own_querier_enabled || timer_pending(&querier->timer)); 1006 } 1007 1008 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1009 struct ethhdr *eth, 1010 const struct net_bridge_mdb_entry *mdb) 1011 { 1012 switch (eth->h_proto) { 1013 case (htons(ETH_P_IP)): 1014 return __br_multicast_querier_exists(brmctx, 1015 &brmctx->ip4_other_query, false); 1016 #if IS_ENABLED(CONFIG_IPV6) 1017 case (htons(ETH_P_IPV6)): 1018 return __br_multicast_querier_exists(brmctx, 1019 &brmctx->ip6_other_query, true); 1020 #endif 1021 default: 1022 return !!mdb && br_group_is_l2(&mdb->addr); 1023 } 1024 } 1025 1026 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1027 { 1028 switch (ip->proto) { 1029 case htons(ETH_P_IP): 1030 return ipv4_is_zeronet(ip->src.ip4); 1031 #if IS_ENABLED(CONFIG_IPV6) 1032 case htons(ETH_P_IPV6): 1033 return ipv6_addr_any(&ip->src.ip6); 1034 #endif 1035 default: 1036 return false; 1037 } 1038 } 1039 1040 static inline bool 1041 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1042 __be16 proto) 1043 { 1044 switch (proto) { 1045 case htons(ETH_P_IP): 1046 return !!(brmctx->multicast_igmp_version == 3); 1047 #if IS_ENABLED(CONFIG_IPV6) 1048 case htons(ETH_P_IPV6): 1049 return !!(brmctx->multicast_mld_version == 2); 1050 #endif 1051 default: 1052 return false; 1053 } 1054 } 1055 1056 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1057 { 1058 return BR_INPUT_SKB_CB(skb)->igmp; 1059 } 1060 1061 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1062 { 1063 return brmctx->multicast_last_member_interval * 1064 brmctx->multicast_last_member_count; 1065 } 1066 1067 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1068 { 1069 /* use the RFC default of 2 for QRV */ 1070 return 2 * brmctx->multicast_query_interval + 1071 brmctx->multicast_query_response_interval; 1072 } 1073 1074 static inline bool 1075 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1076 { 1077 return !!brmctx->vlan; 1078 } 1079 1080 static inline bool 1081 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1082 { 1083 return !!pmctx->vlan; 1084 } 1085 1086 static inline struct net_bridge_mcast * 1087 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1088 { 1089 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1090 return &pmctx->port->br->multicast_ctx; 1091 else 1092 return &pmctx->vlan->brvlan->br_mcast_ctx; 1093 } 1094 1095 static inline bool 1096 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1097 { 1098 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1099 br_multicast_ctx_is_vlan(brmctx) && 1100 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1101 } 1102 1103 static inline bool 1104 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1105 { 1106 return br_multicast_ctx_is_vlan(brmctx) && 1107 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1108 } 1109 1110 static inline bool 1111 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1112 { 1113 return br_multicast_port_ctx_is_vlan(pmctx) && 1114 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1115 } 1116 #else 1117 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1118 struct net_bridge_mcast_port **pmctx, 1119 struct net_bridge_vlan *vlan, 1120 struct sk_buff *skb, 1121 u16 vid) 1122 { 1123 return 0; 1124 } 1125 1126 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1127 struct sk_buff *skb, u16 vid) 1128 { 1129 return NULL; 1130 } 1131 1132 static inline int br_multicast_add_port(struct net_bridge_port *port) 1133 { 1134 return 0; 1135 } 1136 1137 static inline void br_multicast_del_port(struct net_bridge_port *port) 1138 { 1139 } 1140 1141 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1142 { 1143 } 1144 1145 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1146 { 1147 } 1148 1149 static inline void br_multicast_init(struct net_bridge *br) 1150 { 1151 } 1152 1153 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1154 { 1155 } 1156 1157 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1158 { 1159 } 1160 1161 static inline void br_multicast_open(struct net_bridge *br) 1162 { 1163 } 1164 1165 static inline void br_multicast_stop(struct net_bridge *br) 1166 { 1167 } 1168 1169 static inline void br_multicast_dev_del(struct net_bridge *br) 1170 { 1171 } 1172 1173 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1174 struct sk_buff *skb, 1175 struct net_bridge_mcast *brmctx, 1176 bool local_rcv, bool local_orig) 1177 { 1178 } 1179 1180 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1181 struct sk_buff *skb) 1182 { 1183 return false; 1184 } 1185 1186 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1187 struct ethhdr *eth, 1188 const struct net_bridge_mdb_entry *mdb) 1189 { 1190 return false; 1191 } 1192 1193 static inline void br_mdb_init(void) 1194 { 1195 } 1196 1197 static inline void br_mdb_uninit(void) 1198 { 1199 } 1200 1201 static inline int br_mdb_hash_init(struct net_bridge *br) 1202 { 1203 return 0; 1204 } 1205 1206 static inline void br_mdb_hash_fini(struct net_bridge *br) 1207 { 1208 } 1209 1210 static inline void br_multicast_count(struct net_bridge *br, 1211 const struct net_bridge_port *p, 1212 const struct sk_buff *skb, 1213 u8 type, u8 dir) 1214 { 1215 } 1216 1217 static inline int br_multicast_init_stats(struct net_bridge *br) 1218 { 1219 return 0; 1220 } 1221 1222 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1223 { 1224 } 1225 1226 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1227 { 1228 return 0; 1229 } 1230 1231 static inline void br_multicast_ctx_init(struct net_bridge *br, 1232 struct net_bridge_vlan *vlan, 1233 struct net_bridge_mcast *brmctx) 1234 { 1235 } 1236 1237 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1238 { 1239 } 1240 1241 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1242 struct net_bridge_vlan *vlan, 1243 struct net_bridge_mcast_port *pmctx) 1244 { 1245 } 1246 1247 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1248 { 1249 } 1250 1251 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1252 bool on) 1253 { 1254 } 1255 1256 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1257 bool on) 1258 { 1259 } 1260 1261 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1262 bool on, 1263 struct netlink_ext_ack *extack) 1264 { 1265 return -EOPNOTSUPP; 1266 } 1267 #endif 1268 1269 /* br_vlan.c */ 1270 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1271 bool br_allowed_ingress(const struct net_bridge *br, 1272 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1273 u16 *vid, u8 *state, 1274 struct net_bridge_vlan **vlan); 1275 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1276 const struct sk_buff *skb); 1277 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1278 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1279 const struct net_bridge_port *port, 1280 struct net_bridge_vlan_group *vg, 1281 struct sk_buff *skb); 1282 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1283 bool *changed, struct netlink_ext_ack *extack); 1284 int br_vlan_delete(struct net_bridge *br, u16 vid); 1285 void br_vlan_flush(struct net_bridge *br); 1286 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1287 void br_recalculate_fwd_mask(struct net_bridge *br); 1288 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1289 struct netlink_ext_ack *extack); 1290 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1291 struct netlink_ext_ack *extack); 1292 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1293 struct netlink_ext_ack *extack); 1294 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1295 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1296 int br_vlan_init(struct net_bridge *br); 1297 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1298 struct netlink_ext_ack *extack); 1299 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1300 struct netlink_ext_ack *extack); 1301 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1302 bool *changed, struct netlink_ext_ack *extack); 1303 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1304 void nbp_vlan_flush(struct net_bridge_port *port); 1305 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1306 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1307 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1308 struct pcpu_sw_netstats *stats); 1309 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1310 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1311 void *ptr); 1312 void br_vlan_rtnl_init(void); 1313 void br_vlan_rtnl_uninit(void); 1314 void br_vlan_notify(const struct net_bridge *br, 1315 const struct net_bridge_port *p, 1316 u16 vid, u16 vid_range, 1317 int cmd); 1318 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1319 const struct net_bridge_vlan *range_end); 1320 1321 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1322 struct net_device_path_ctx *ctx, 1323 struct net_device_path *path); 1324 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1325 struct net_bridge_port *dst, 1326 struct net_device_path *path); 1327 1328 static inline struct net_bridge_vlan_group *br_vlan_group( 1329 const struct net_bridge *br) 1330 { 1331 return rtnl_dereference(br->vlgrp); 1332 } 1333 1334 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1335 const struct net_bridge_port *p) 1336 { 1337 return rtnl_dereference(p->vlgrp); 1338 } 1339 1340 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1341 const struct net_bridge *br) 1342 { 1343 return rcu_dereference(br->vlgrp); 1344 } 1345 1346 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1347 const struct net_bridge_port *p) 1348 { 1349 return rcu_dereference(p->vlgrp); 1350 } 1351 1352 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1353 * skb, the vlan tag will always be present if the frame was tagged. 1354 */ 1355 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1356 { 1357 int err = 0; 1358 1359 if (skb_vlan_tag_present(skb)) { 1360 *vid = skb_vlan_tag_get_id(skb); 1361 } else { 1362 *vid = 0; 1363 err = -EINVAL; 1364 } 1365 1366 return err; 1367 } 1368 1369 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1370 { 1371 if (!vg) 1372 return 0; 1373 1374 smp_rmb(); 1375 return vg->pvid; 1376 } 1377 1378 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1379 { 1380 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1381 } 1382 #else 1383 static inline bool br_allowed_ingress(const struct net_bridge *br, 1384 struct net_bridge_vlan_group *vg, 1385 struct sk_buff *skb, 1386 u16 *vid, u8 *state, 1387 struct net_bridge_vlan **vlan) 1388 1389 { 1390 *vlan = NULL; 1391 return true; 1392 } 1393 1394 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1395 const struct sk_buff *skb) 1396 { 1397 return true; 1398 } 1399 1400 static inline bool br_should_learn(struct net_bridge_port *p, 1401 struct sk_buff *skb, u16 *vid) 1402 { 1403 return true; 1404 } 1405 1406 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1407 const struct net_bridge_port *port, 1408 struct net_bridge_vlan_group *vg, 1409 struct sk_buff *skb) 1410 { 1411 return skb; 1412 } 1413 1414 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1415 bool *changed, struct netlink_ext_ack *extack) 1416 { 1417 *changed = false; 1418 return -EOPNOTSUPP; 1419 } 1420 1421 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1422 { 1423 return -EOPNOTSUPP; 1424 } 1425 1426 static inline void br_vlan_flush(struct net_bridge *br) 1427 { 1428 } 1429 1430 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1431 { 1432 } 1433 1434 static inline int br_vlan_init(struct net_bridge *br) 1435 { 1436 return 0; 1437 } 1438 1439 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1440 bool *changed, struct netlink_ext_ack *extack) 1441 { 1442 *changed = false; 1443 return -EOPNOTSUPP; 1444 } 1445 1446 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1447 { 1448 return -EOPNOTSUPP; 1449 } 1450 1451 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1452 { 1453 } 1454 1455 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1456 u16 vid) 1457 { 1458 return NULL; 1459 } 1460 1461 static inline int nbp_vlan_init(struct net_bridge_port *port, 1462 struct netlink_ext_ack *extack) 1463 { 1464 return 0; 1465 } 1466 1467 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1468 { 1469 return 0; 1470 } 1471 1472 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1473 { 1474 return 0; 1475 } 1476 1477 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1478 unsigned long val, 1479 struct netlink_ext_ack *extack) 1480 { 1481 return -EOPNOTSUPP; 1482 } 1483 1484 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1485 u32 filter_mask) 1486 { 1487 return 0; 1488 } 1489 1490 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1491 struct net_device_path_ctx *ctx, 1492 struct net_device_path *path) 1493 { 1494 } 1495 1496 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1497 struct net_bridge_port *dst, 1498 struct net_device_path *path) 1499 { 1500 return 0; 1501 } 1502 1503 static inline struct net_bridge_vlan_group *br_vlan_group( 1504 const struct net_bridge *br) 1505 { 1506 return NULL; 1507 } 1508 1509 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1510 const struct net_bridge_port *p) 1511 { 1512 return NULL; 1513 } 1514 1515 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1516 const struct net_bridge *br) 1517 { 1518 return NULL; 1519 } 1520 1521 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1522 const struct net_bridge_port *p) 1523 { 1524 return NULL; 1525 } 1526 1527 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1528 struct pcpu_sw_netstats *stats) 1529 { 1530 } 1531 1532 static inline void br_vlan_port_event(struct net_bridge_port *p, 1533 unsigned long event) 1534 { 1535 } 1536 1537 static inline int br_vlan_bridge_event(struct net_device *dev, 1538 unsigned long event, void *ptr) 1539 { 1540 return 0; 1541 } 1542 1543 static inline void br_vlan_rtnl_init(void) 1544 { 1545 } 1546 1547 static inline void br_vlan_rtnl_uninit(void) 1548 { 1549 } 1550 1551 static inline void br_vlan_notify(const struct net_bridge *br, 1552 const struct net_bridge_port *p, 1553 u16 vid, u16 vid_range, 1554 int cmd) 1555 { 1556 } 1557 1558 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1559 const struct net_bridge_vlan *range_end) 1560 { 1561 return true; 1562 } 1563 #endif 1564 1565 /* br_vlan_options.c */ 1566 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1567 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1568 const struct net_bridge_vlan *range_end); 1569 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1570 size_t br_vlan_opts_nl_size(void); 1571 int br_vlan_process_options(const struct net_bridge *br, 1572 const struct net_bridge_port *p, 1573 struct net_bridge_vlan *range_start, 1574 struct net_bridge_vlan *range_end, 1575 struct nlattr **tb, 1576 struct netlink_ext_ack *extack); 1577 1578 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1579 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1580 { 1581 return READ_ONCE(v->state); 1582 } 1583 1584 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1585 { 1586 WRITE_ONCE(v->state, state); 1587 } 1588 1589 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1590 { 1591 return READ_ONCE(vg->pvid_state); 1592 } 1593 1594 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1595 u8 state) 1596 { 1597 WRITE_ONCE(vg->pvid_state, state); 1598 } 1599 1600 /* learn_allow is true at ingress and false at egress */ 1601 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1602 { 1603 switch (state) { 1604 case BR_STATE_LEARNING: 1605 return learn_allow; 1606 case BR_STATE_FORWARDING: 1607 return true; 1608 default: 1609 return false; 1610 } 1611 } 1612 #endif 1613 1614 struct nf_br_ops { 1615 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1616 }; 1617 extern const struct nf_br_ops __rcu *nf_br_ops; 1618 1619 /* br_netfilter.c */ 1620 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1621 int br_nf_core_init(void); 1622 void br_nf_core_fini(void); 1623 void br_netfilter_rtable_init(struct net_bridge *); 1624 #else 1625 static inline int br_nf_core_init(void) { return 0; } 1626 static inline void br_nf_core_fini(void) {} 1627 #define br_netfilter_rtable_init(x) 1628 #endif 1629 1630 /* br_stp.c */ 1631 void br_set_state(struct net_bridge_port *p, unsigned int state); 1632 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1633 void br_init_port(struct net_bridge_port *p); 1634 void br_become_designated_port(struct net_bridge_port *p); 1635 1636 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1637 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1638 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1639 int br_set_max_age(struct net_bridge *br, unsigned long x); 1640 int __set_ageing_time(struct net_device *dev, unsigned long t); 1641 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1642 1643 1644 /* br_stp_if.c */ 1645 void br_stp_enable_bridge(struct net_bridge *br); 1646 void br_stp_disable_bridge(struct net_bridge *br); 1647 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1648 struct netlink_ext_ack *extack); 1649 void br_stp_enable_port(struct net_bridge_port *p); 1650 void br_stp_disable_port(struct net_bridge_port *p); 1651 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1652 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1653 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1654 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1655 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1656 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1657 1658 /* br_stp_bpdu.c */ 1659 struct stp_proto; 1660 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1661 struct net_device *dev); 1662 1663 /* br_stp_timer.c */ 1664 void br_stp_timer_init(struct net_bridge *br); 1665 void br_stp_port_timer_init(struct net_bridge_port *p); 1666 unsigned long br_timer_value(const struct timer_list *timer); 1667 1668 /* br.c */ 1669 #if IS_ENABLED(CONFIG_ATM_LANE) 1670 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1671 #endif 1672 1673 /* br_mrp.c */ 1674 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1675 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1676 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1677 bool br_mrp_enabled(struct net_bridge *br); 1678 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1679 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1680 #else 1681 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1682 struct nlattr *attr, int cmd, 1683 struct netlink_ext_ack *extack) 1684 { 1685 return -EOPNOTSUPP; 1686 } 1687 1688 static inline bool br_mrp_enabled(struct net_bridge *br) 1689 { 1690 return false; 1691 } 1692 1693 static inline void br_mrp_port_del(struct net_bridge *br, 1694 struct net_bridge_port *p) 1695 { 1696 } 1697 1698 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1699 { 1700 return 0; 1701 } 1702 1703 #endif 1704 1705 /* br_cfm.c */ 1706 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1707 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1708 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1709 bool br_cfm_created(struct net_bridge *br); 1710 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1711 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1712 int br_cfm_status_fill_info(struct sk_buff *skb, 1713 struct net_bridge *br, 1714 bool getlink); 1715 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1716 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1717 #else 1718 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1719 struct nlattr *attr, int cmd, 1720 struct netlink_ext_ack *extack) 1721 { 1722 return -EOPNOTSUPP; 1723 } 1724 1725 static inline bool br_cfm_created(struct net_bridge *br) 1726 { 1727 return false; 1728 } 1729 1730 static inline void br_cfm_port_del(struct net_bridge *br, 1731 struct net_bridge_port *p) 1732 { 1733 } 1734 1735 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1736 { 1737 return -EOPNOTSUPP; 1738 } 1739 1740 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1741 struct net_bridge *br, 1742 bool getlink) 1743 { 1744 return -EOPNOTSUPP; 1745 } 1746 1747 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1748 { 1749 return -EOPNOTSUPP; 1750 } 1751 1752 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1753 { 1754 return -EOPNOTSUPP; 1755 } 1756 #endif 1757 1758 /* br_netlink.c */ 1759 extern struct rtnl_link_ops br_link_ops; 1760 int br_netlink_init(void); 1761 void br_netlink_fini(void); 1762 void br_ifinfo_notify(int event, const struct net_bridge *br, 1763 const struct net_bridge_port *port); 1764 void br_info_notify(int event, const struct net_bridge *br, 1765 const struct net_bridge_port *port, u32 filter); 1766 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1767 struct netlink_ext_ack *extack); 1768 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1769 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1770 u32 filter_mask, int nlflags); 1771 int br_process_vlan_info(struct net_bridge *br, 1772 struct net_bridge_port *p, int cmd, 1773 struct bridge_vlan_info *vinfo_curr, 1774 struct bridge_vlan_info **vinfo_last, 1775 bool *changed, 1776 struct netlink_ext_ack *extack); 1777 1778 #ifdef CONFIG_SYSFS 1779 /* br_sysfs_if.c */ 1780 extern const struct sysfs_ops brport_sysfs_ops; 1781 int br_sysfs_addif(struct net_bridge_port *p); 1782 int br_sysfs_renameif(struct net_bridge_port *p); 1783 1784 /* br_sysfs_br.c */ 1785 int br_sysfs_addbr(struct net_device *dev); 1786 void br_sysfs_delbr(struct net_device *dev); 1787 1788 #else 1789 1790 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1791 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1792 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1793 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1794 #endif /* CONFIG_SYSFS */ 1795 1796 /* br_switchdev.c */ 1797 #ifdef CONFIG_NET_SWITCHDEV 1798 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1799 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1800 struct sk_buff *skb); 1801 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1802 const struct sk_buff *skb); 1803 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1804 unsigned long flags, 1805 unsigned long mask, 1806 struct netlink_ext_ack *extack); 1807 void br_switchdev_fdb_notify(struct net_bridge *br, 1808 const struct net_bridge_fdb_entry *fdb, int type); 1809 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1810 struct netlink_ext_ack *extack); 1811 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1812 1813 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1814 { 1815 skb->offload_fwd_mark = 0; 1816 } 1817 #else 1818 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1819 { 1820 return 0; 1821 } 1822 1823 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1824 struct sk_buff *skb) 1825 { 1826 } 1827 1828 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1829 const struct sk_buff *skb) 1830 { 1831 return true; 1832 } 1833 1834 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1835 unsigned long flags, 1836 unsigned long mask, 1837 struct netlink_ext_ack *extack) 1838 { 1839 return 0; 1840 } 1841 1842 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1843 u16 vid, u16 flags, 1844 struct netlink_ext_ack *extack) 1845 { 1846 return -EOPNOTSUPP; 1847 } 1848 1849 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1850 { 1851 return -EOPNOTSUPP; 1852 } 1853 1854 static inline void 1855 br_switchdev_fdb_notify(struct net_bridge *br, 1856 const struct net_bridge_fdb_entry *fdb, int type) 1857 { 1858 } 1859 1860 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1861 { 1862 } 1863 #endif /* CONFIG_NET_SWITCHDEV */ 1864 1865 /* br_arp_nd_proxy.c */ 1866 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1867 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1868 u16 vid, struct net_bridge_port *p); 1869 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1870 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1871 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1872 #endif 1873