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 }; 437 438 struct net_bridge { 439 spinlock_t lock; 440 spinlock_t hash_lock; 441 struct hlist_head frame_type_list; 442 struct net_device *dev; 443 unsigned long options; 444 /* These fields are accessed on each packet */ 445 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 446 __be16 vlan_proto; 447 u16 default_pvid; 448 struct net_bridge_vlan_group __rcu *vlgrp; 449 #endif 450 451 struct rhashtable fdb_hash_tbl; 452 struct list_head port_list; 453 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 454 union { 455 struct rtable fake_rtable; 456 struct rt6_info fake_rt6_info; 457 }; 458 #endif 459 u16 group_fwd_mask; 460 u16 group_fwd_mask_required; 461 462 /* STP */ 463 bridge_id designated_root; 464 bridge_id bridge_id; 465 unsigned char topology_change; 466 unsigned char topology_change_detected; 467 u16 root_port; 468 unsigned long max_age; 469 unsigned long hello_time; 470 unsigned long forward_delay; 471 unsigned long ageing_time; 472 unsigned long bridge_max_age; 473 unsigned long bridge_hello_time; 474 unsigned long bridge_forward_delay; 475 unsigned long bridge_ageing_time; 476 u32 root_path_cost; 477 478 u8 group_addr[ETH_ALEN]; 479 480 enum { 481 BR_NO_STP, /* no spanning tree */ 482 BR_KERNEL_STP, /* old STP in kernel */ 483 BR_USER_STP, /* new RSTP in userspace */ 484 } stp_enabled; 485 486 struct net_bridge_mcast multicast_ctx; 487 488 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 489 struct bridge_mcast_stats __percpu *mcast_stats; 490 491 u32 hash_max; 492 493 spinlock_t multicast_lock; 494 495 struct rhashtable mdb_hash_tbl; 496 struct rhashtable sg_port_tbl; 497 498 struct hlist_head mcast_gc_list; 499 struct hlist_head mdb_list; 500 501 struct work_struct mcast_gc_work; 502 #endif 503 504 struct timer_list hello_timer; 505 struct timer_list tcn_timer; 506 struct timer_list topology_change_timer; 507 struct delayed_work gc_work; 508 struct kobject *ifobj; 509 u32 auto_cnt; 510 511 #ifdef CONFIG_NET_SWITCHDEV 512 int offload_fwd_mark; 513 #endif 514 struct hlist_head fdb_list; 515 516 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 517 struct hlist_head mrp_list; 518 #endif 519 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 520 struct hlist_head mep_list; 521 #endif 522 }; 523 524 struct br_input_skb_cb { 525 struct net_device *brdev; 526 527 u16 frag_max_size; 528 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 529 u8 igmp; 530 u8 mrouters_only:1; 531 #endif 532 u8 proxyarp_replied:1; 533 u8 src_port_isolated:1; 534 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 535 u8 vlan_filtered:1; 536 #endif 537 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 538 u8 br_netfilter_broute:1; 539 #endif 540 541 #ifdef CONFIG_NET_SWITCHDEV 542 int offload_fwd_mark; 543 #endif 544 }; 545 546 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 547 548 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 549 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 550 #else 551 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 552 #endif 553 554 #define br_printk(level, br, format, args...) \ 555 printk(level "%s: " format, (br)->dev->name, ##args) 556 557 #define br_err(__br, format, args...) \ 558 br_printk(KERN_ERR, __br, format, ##args) 559 #define br_warn(__br, format, args...) \ 560 br_printk(KERN_WARNING, __br, format, ##args) 561 #define br_notice(__br, format, args...) \ 562 br_printk(KERN_NOTICE, __br, format, ##args) 563 #define br_info(__br, format, args...) \ 564 br_printk(KERN_INFO, __br, format, ##args) 565 566 #define br_debug(br, format, args...) \ 567 pr_debug("%s: " format, (br)->dev->name, ##args) 568 569 /* called under bridge lock */ 570 static inline int br_is_root_bridge(const struct net_bridge *br) 571 { 572 return !memcmp(&br->bridge_id, &br->designated_root, 8); 573 } 574 575 /* check if a VLAN entry is global */ 576 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 577 { 578 return v->flags & BRIDGE_VLAN_INFO_MASTER; 579 } 580 581 /* check if a VLAN entry is used by the bridge */ 582 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 583 { 584 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 585 } 586 587 /* check if we should use the vlan entry, returns false if it's only context */ 588 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 589 { 590 if (br_vlan_is_master(v)) { 591 if (br_vlan_is_brentry(v)) 592 return true; 593 else 594 return false; 595 } 596 597 return true; 598 } 599 600 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 601 { 602 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 603 } 604 605 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 606 { 607 bool ret = vid > 0 && vid < VLAN_VID_MASK; 608 609 if (!ret) 610 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 611 612 return ret; 613 } 614 615 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 616 const struct bridge_vlan_info *last, 617 struct netlink_ext_ack *extack) 618 { 619 /* pvid flag is not allowed in ranges */ 620 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 621 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 622 return false; 623 } 624 625 /* when cur is the range end, check if: 626 * - it has range start flag 627 * - range ids are invalid (end is equal to or before start) 628 */ 629 if (last) { 630 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 631 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 632 return false; 633 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 634 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 635 return false; 636 } else if (cur->vid <= last->vid) { 637 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 638 return false; 639 } 640 } 641 642 /* check for required range flags */ 643 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 644 BRIDGE_VLAN_INFO_RANGE_END))) { 645 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 646 return false; 647 } 648 649 return true; 650 } 651 652 static inline int br_afspec_cmd_to_rtm(int cmd) 653 { 654 switch (cmd) { 655 case RTM_SETLINK: 656 return RTM_NEWVLAN; 657 case RTM_DELLINK: 658 return RTM_DELVLAN; 659 } 660 661 return 0; 662 } 663 664 static inline int br_opt_get(const struct net_bridge *br, 665 enum net_bridge_opts opt) 666 { 667 return test_bit(opt, &br->options); 668 } 669 670 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 671 struct netlink_ext_ack *extack); 672 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 673 int br_boolopt_multi_toggle(struct net_bridge *br, 674 struct br_boolopt_multi *bm, 675 struct netlink_ext_ack *extack); 676 void br_boolopt_multi_get(const struct net_bridge *br, 677 struct br_boolopt_multi *bm); 678 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 679 680 /* br_device.c */ 681 void br_dev_setup(struct net_device *dev); 682 void br_dev_delete(struct net_device *dev, struct list_head *list); 683 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 684 #ifdef CONFIG_NET_POLL_CONTROLLER 685 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 686 struct sk_buff *skb) 687 { 688 netpoll_send_skb(p->np, skb); 689 } 690 691 int br_netpoll_enable(struct net_bridge_port *p); 692 void br_netpoll_disable(struct net_bridge_port *p); 693 #else 694 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 695 struct sk_buff *skb) 696 { 697 } 698 699 static inline int br_netpoll_enable(struct net_bridge_port *p) 700 { 701 return 0; 702 } 703 704 static inline void br_netpoll_disable(struct net_bridge_port *p) 705 { 706 } 707 #endif 708 709 /* br_fdb.c */ 710 int br_fdb_init(void); 711 void br_fdb_fini(void); 712 int br_fdb_hash_init(struct net_bridge *br); 713 void br_fdb_hash_fini(struct net_bridge *br); 714 void br_fdb_flush(struct net_bridge *br); 715 void br_fdb_find_delete_local(struct net_bridge *br, 716 const struct net_bridge_port *p, 717 const unsigned char *addr, u16 vid); 718 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 719 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 720 void br_fdb_cleanup(struct work_struct *work); 721 void br_fdb_delete_by_port(struct net_bridge *br, 722 const struct net_bridge_port *p, u16 vid, int do_all); 723 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 724 const unsigned char *addr, 725 __u16 vid); 726 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 727 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 728 unsigned long off); 729 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 730 const unsigned char *addr, u16 vid); 731 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 732 const unsigned char *addr, u16 vid, unsigned long flags); 733 734 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 735 struct net_device *dev, const unsigned char *addr, u16 vid); 736 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 737 const unsigned char *addr, u16 vid, u16 nlh_flags, 738 struct netlink_ext_ack *extack); 739 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 740 struct net_device *dev, struct net_device *fdev, int *idx); 741 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 742 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 743 struct netlink_ext_ack *extack); 744 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 745 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 746 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 747 const unsigned char *addr, u16 vid, 748 bool swdev_notify); 749 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 750 const unsigned char *addr, u16 vid, 751 bool swdev_notify); 752 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 753 const unsigned char *addr, u16 vid, bool offloaded); 754 755 /* br_forward.c */ 756 enum br_pkt_type { 757 BR_PKT_UNICAST, 758 BR_PKT_MULTICAST, 759 BR_PKT_BROADCAST 760 }; 761 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 762 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 763 bool local_rcv, bool local_orig); 764 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 765 void br_flood(struct net_bridge *br, struct sk_buff *skb, 766 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 767 768 /* return true if both source port and dest port are isolated */ 769 static inline bool br_skb_isolated(const struct net_bridge_port *to, 770 const struct sk_buff *skb) 771 { 772 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 773 (to->flags & BR_ISOLATED); 774 } 775 776 /* br_if.c */ 777 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 778 int br_add_bridge(struct net *net, const char *name); 779 int br_del_bridge(struct net *net, const char *name); 780 int br_add_if(struct net_bridge *br, struct net_device *dev, 781 struct netlink_ext_ack *extack); 782 int br_del_if(struct net_bridge *br, struct net_device *dev); 783 void br_mtu_auto_adjust(struct net_bridge *br); 784 netdev_features_t br_features_recompute(struct net_bridge *br, 785 netdev_features_t features); 786 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 787 void br_manage_promisc(struct net_bridge *br); 788 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 789 790 /* br_input.c */ 791 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 792 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 793 794 struct br_frame_type { 795 __be16 type; 796 int (*frame_handler)(struct net_bridge_port *port, 797 struct sk_buff *skb); 798 struct hlist_node list; 799 }; 800 801 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 802 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 803 804 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 805 { 806 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 807 } 808 809 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 810 { 811 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 812 } 813 814 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 815 { 816 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 817 } 818 819 static inline struct net_bridge_port * 820 br_port_get_check_rtnl(const struct net_device *dev) 821 { 822 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 823 } 824 825 /* br_ioctl.c */ 826 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 827 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 828 void __user *arg); 829 830 /* br_multicast.c */ 831 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 832 int br_multicast_rcv(struct net_bridge_mcast *brmctx, 833 struct net_bridge_mcast_port *pmctx, 834 struct sk_buff *skb, u16 vid); 835 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 836 struct sk_buff *skb, u16 vid); 837 int br_multicast_add_port(struct net_bridge_port *port); 838 void br_multicast_del_port(struct net_bridge_port *port); 839 void br_multicast_enable_port(struct net_bridge_port *port); 840 void br_multicast_disable_port(struct net_bridge_port *port); 841 void br_multicast_init(struct net_bridge *br); 842 void br_multicast_join_snoopers(struct net_bridge *br); 843 void br_multicast_leave_snoopers(struct net_bridge *br); 844 void br_multicast_open(struct net_bridge *br); 845 void br_multicast_stop(struct net_bridge *br); 846 void br_multicast_dev_del(struct net_bridge *br); 847 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 848 struct net_bridge_mcast *brmctx, 849 bool local_rcv, bool local_orig); 850 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 851 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 852 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 853 struct netlink_ext_ack *extack); 854 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 855 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 856 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 857 #if IS_ENABLED(CONFIG_IPV6) 858 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 859 #endif 860 struct net_bridge_mdb_entry * 861 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 862 struct net_bridge_mdb_entry * 863 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 864 struct net_bridge_port_group * 865 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 866 struct net_bridge_port_group __rcu *next, 867 unsigned char flags, const unsigned char *src, 868 u8 filter_mode, u8 rt_protocol); 869 int br_mdb_hash_init(struct net_bridge *br); 870 void br_mdb_hash_fini(struct net_bridge *br); 871 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 872 struct net_bridge_port_group *pg, int type); 873 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 874 int type); 875 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 876 struct net_bridge_port_group *pg, 877 struct net_bridge_port_group __rcu **pp); 878 void br_multicast_count(struct net_bridge *br, 879 const struct net_bridge_port *p, 880 const struct sk_buff *skb, u8 type, u8 dir); 881 int br_multicast_init_stats(struct net_bridge *br); 882 void br_multicast_uninit_stats(struct net_bridge *br); 883 void br_multicast_get_stats(const struct net_bridge *br, 884 const struct net_bridge_port *p, 885 struct br_mcast_stats *dest); 886 void br_mdb_init(void); 887 void br_mdb_uninit(void); 888 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 889 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 890 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 891 u8 filter_mode); 892 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 893 struct net_bridge_port_group *sg); 894 struct net_bridge_group_src * 895 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 896 void br_multicast_del_group_src(struct net_bridge_group_src *src, 897 bool fastleave); 898 void br_multicast_ctx_init(struct net_bridge *br, 899 struct net_bridge_vlan *vlan, 900 struct net_bridge_mcast *brmctx); 901 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 902 void br_multicast_port_ctx_init(struct net_bridge_port *port, 903 struct net_bridge_vlan *vlan, 904 struct net_bridge_mcast_port *pmctx); 905 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 906 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 907 908 static inline bool br_group_is_l2(const struct br_ip *group) 909 { 910 return group->proto == 0; 911 } 912 913 #define mlock_dereference(X, br) \ 914 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 915 916 static inline struct hlist_node * 917 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 918 struct sk_buff *skb) 919 { 920 #if IS_ENABLED(CONFIG_IPV6) 921 if (skb->protocol == htons(ETH_P_IPV6)) 922 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 923 #endif 924 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 925 } 926 927 static inline struct net_bridge_port * 928 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 929 { 930 struct net_bridge_mcast_port *mctx; 931 932 #if IS_ENABLED(CONFIG_IPV6) 933 if (skb->protocol == htons(ETH_P_IPV6)) 934 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 935 ip6_rlist); 936 else 937 #endif 938 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 939 ip4_rlist); 940 941 if (mctx) 942 return mctx->port; 943 else 944 return NULL; 945 } 946 947 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 948 { 949 return timer_pending(&brmctx->ip4_mc_router_timer); 950 } 951 952 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 953 { 954 #if IS_ENABLED(CONFIG_IPV6) 955 return timer_pending(&brmctx->ip6_mc_router_timer); 956 #else 957 return false; 958 #endif 959 } 960 961 static inline bool 962 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 963 { 964 switch (brmctx->multicast_router) { 965 case MDB_RTR_TYPE_PERM: 966 return true; 967 case MDB_RTR_TYPE_TEMP_QUERY: 968 if (skb) { 969 if (skb->protocol == htons(ETH_P_IP)) 970 return br_ip4_multicast_is_router(brmctx); 971 else if (skb->protocol == htons(ETH_P_IPV6)) 972 return br_ip6_multicast_is_router(brmctx); 973 } else { 974 return br_ip4_multicast_is_router(brmctx) || 975 br_ip6_multicast_is_router(brmctx); 976 } 977 fallthrough; 978 default: 979 return false; 980 } 981 } 982 983 static inline bool 984 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 985 struct bridge_mcast_other_query *querier, 986 const bool is_ipv6) 987 { 988 bool own_querier_enabled; 989 990 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 991 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 992 own_querier_enabled = false; 993 else 994 own_querier_enabled = true; 995 } else { 996 own_querier_enabled = false; 997 } 998 999 return time_is_before_jiffies(querier->delay_time) && 1000 (own_querier_enabled || timer_pending(&querier->timer)); 1001 } 1002 1003 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1004 struct ethhdr *eth, 1005 const struct net_bridge_mdb_entry *mdb) 1006 { 1007 switch (eth->h_proto) { 1008 case (htons(ETH_P_IP)): 1009 return __br_multicast_querier_exists(brmctx, 1010 &brmctx->ip4_other_query, false); 1011 #if IS_ENABLED(CONFIG_IPV6) 1012 case (htons(ETH_P_IPV6)): 1013 return __br_multicast_querier_exists(brmctx, 1014 &brmctx->ip6_other_query, true); 1015 #endif 1016 default: 1017 return !!mdb && br_group_is_l2(&mdb->addr); 1018 } 1019 } 1020 1021 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1022 { 1023 switch (ip->proto) { 1024 case htons(ETH_P_IP): 1025 return ipv4_is_zeronet(ip->src.ip4); 1026 #if IS_ENABLED(CONFIG_IPV6) 1027 case htons(ETH_P_IPV6): 1028 return ipv6_addr_any(&ip->src.ip6); 1029 #endif 1030 default: 1031 return false; 1032 } 1033 } 1034 1035 static inline bool 1036 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1037 __be16 proto) 1038 { 1039 switch (proto) { 1040 case htons(ETH_P_IP): 1041 return !!(brmctx->multicast_igmp_version == 3); 1042 #if IS_ENABLED(CONFIG_IPV6) 1043 case htons(ETH_P_IPV6): 1044 return !!(brmctx->multicast_mld_version == 2); 1045 #endif 1046 default: 1047 return false; 1048 } 1049 } 1050 1051 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1052 { 1053 return BR_INPUT_SKB_CB(skb)->igmp; 1054 } 1055 1056 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1057 { 1058 return brmctx->multicast_last_member_interval * 1059 brmctx->multicast_last_member_count; 1060 } 1061 1062 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1063 { 1064 /* use the RFC default of 2 for QRV */ 1065 return 2 * brmctx->multicast_query_interval + 1066 brmctx->multicast_query_response_interval; 1067 } 1068 1069 static inline bool 1070 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1071 { 1072 return !!brmctx->vlan; 1073 } 1074 1075 static inline bool 1076 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1077 { 1078 return !!pmctx->vlan; 1079 } 1080 1081 static inline struct net_bridge_mcast * 1082 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1083 { 1084 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1085 return &pmctx->port->br->multicast_ctx; 1086 else 1087 return &pmctx->vlan->brvlan->br_mcast_ctx; 1088 } 1089 1090 static inline bool 1091 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1092 { 1093 return br_multicast_ctx_is_vlan(brmctx) && 1094 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1095 } 1096 1097 static inline bool 1098 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1099 { 1100 return br_multicast_ctx_is_vlan(brmctx) && 1101 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1102 } 1103 1104 static inline bool 1105 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1106 { 1107 return br_multicast_port_ctx_is_vlan(pmctx) && 1108 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1109 } 1110 #else 1111 static inline int br_multicast_rcv(struct net_bridge_mcast *brmctx, 1112 struct net_bridge_mcast_port *pmctx, 1113 struct sk_buff *skb, 1114 u16 vid) 1115 { 1116 return 0; 1117 } 1118 1119 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1120 struct sk_buff *skb, u16 vid) 1121 { 1122 return NULL; 1123 } 1124 1125 static inline int br_multicast_add_port(struct net_bridge_port *port) 1126 { 1127 return 0; 1128 } 1129 1130 static inline void br_multicast_del_port(struct net_bridge_port *port) 1131 { 1132 } 1133 1134 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1135 { 1136 } 1137 1138 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1139 { 1140 } 1141 1142 static inline void br_multicast_init(struct net_bridge *br) 1143 { 1144 } 1145 1146 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1147 { 1148 } 1149 1150 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1151 { 1152 } 1153 1154 static inline void br_multicast_open(struct net_bridge *br) 1155 { 1156 } 1157 1158 static inline void br_multicast_stop(struct net_bridge *br) 1159 { 1160 } 1161 1162 static inline void br_multicast_dev_del(struct net_bridge *br) 1163 { 1164 } 1165 1166 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1167 struct sk_buff *skb, 1168 struct net_bridge_mcast *brmctx, 1169 bool local_rcv, bool local_orig) 1170 { 1171 } 1172 1173 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1174 struct sk_buff *skb) 1175 { 1176 return false; 1177 } 1178 1179 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1180 struct ethhdr *eth, 1181 const struct net_bridge_mdb_entry *mdb) 1182 { 1183 return false; 1184 } 1185 1186 static inline void br_mdb_init(void) 1187 { 1188 } 1189 1190 static inline void br_mdb_uninit(void) 1191 { 1192 } 1193 1194 static inline int br_mdb_hash_init(struct net_bridge *br) 1195 { 1196 return 0; 1197 } 1198 1199 static inline void br_mdb_hash_fini(struct net_bridge *br) 1200 { 1201 } 1202 1203 static inline void br_multicast_count(struct net_bridge *br, 1204 const struct net_bridge_port *p, 1205 const struct sk_buff *skb, 1206 u8 type, u8 dir) 1207 { 1208 } 1209 1210 static inline int br_multicast_init_stats(struct net_bridge *br) 1211 { 1212 return 0; 1213 } 1214 1215 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1216 { 1217 } 1218 1219 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1220 { 1221 return 0; 1222 } 1223 1224 static inline void br_multicast_ctx_init(struct net_bridge *br, 1225 struct net_bridge_vlan *vlan, 1226 struct net_bridge_mcast *brmctx) 1227 { 1228 } 1229 1230 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1231 { 1232 } 1233 1234 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1235 struct net_bridge_vlan *vlan, 1236 struct net_bridge_mcast_port *pmctx) 1237 { 1238 } 1239 1240 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1241 { 1242 } 1243 1244 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1245 bool on) 1246 { 1247 } 1248 #endif 1249 1250 /* br_vlan.c */ 1251 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1252 bool br_allowed_ingress(const struct net_bridge *br, 1253 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1254 u16 *vid, u8 *state); 1255 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1256 const struct sk_buff *skb); 1257 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1258 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1259 const struct net_bridge_port *port, 1260 struct net_bridge_vlan_group *vg, 1261 struct sk_buff *skb); 1262 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1263 bool *changed, struct netlink_ext_ack *extack); 1264 int br_vlan_delete(struct net_bridge *br, u16 vid); 1265 void br_vlan_flush(struct net_bridge *br); 1266 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1267 void br_recalculate_fwd_mask(struct net_bridge *br); 1268 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1269 struct netlink_ext_ack *extack); 1270 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1271 struct netlink_ext_ack *extack); 1272 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1273 struct netlink_ext_ack *extack); 1274 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1275 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1276 int br_vlan_init(struct net_bridge *br); 1277 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1278 struct netlink_ext_ack *extack); 1279 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1280 struct netlink_ext_ack *extack); 1281 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1282 bool *changed, struct netlink_ext_ack *extack); 1283 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1284 void nbp_vlan_flush(struct net_bridge_port *port); 1285 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1286 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1287 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1288 struct pcpu_sw_netstats *stats); 1289 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1290 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1291 void *ptr); 1292 void br_vlan_rtnl_init(void); 1293 void br_vlan_rtnl_uninit(void); 1294 void br_vlan_notify(const struct net_bridge *br, 1295 const struct net_bridge_port *p, 1296 u16 vid, u16 vid_range, 1297 int cmd); 1298 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1299 const struct net_bridge_vlan *range_end); 1300 1301 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1302 struct net_device_path_ctx *ctx, 1303 struct net_device_path *path); 1304 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1305 struct net_bridge_port *dst, 1306 struct net_device_path *path); 1307 1308 static inline struct net_bridge_vlan_group *br_vlan_group( 1309 const struct net_bridge *br) 1310 { 1311 return rtnl_dereference(br->vlgrp); 1312 } 1313 1314 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1315 const struct net_bridge_port *p) 1316 { 1317 return rtnl_dereference(p->vlgrp); 1318 } 1319 1320 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1321 const struct net_bridge *br) 1322 { 1323 return rcu_dereference(br->vlgrp); 1324 } 1325 1326 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1327 const struct net_bridge_port *p) 1328 { 1329 return rcu_dereference(p->vlgrp); 1330 } 1331 1332 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1333 * skb, the vlan tag will always be present if the frame was tagged. 1334 */ 1335 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1336 { 1337 int err = 0; 1338 1339 if (skb_vlan_tag_present(skb)) { 1340 *vid = skb_vlan_tag_get_id(skb); 1341 } else { 1342 *vid = 0; 1343 err = -EINVAL; 1344 } 1345 1346 return err; 1347 } 1348 1349 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1350 { 1351 if (!vg) 1352 return 0; 1353 1354 smp_rmb(); 1355 return vg->pvid; 1356 } 1357 1358 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1359 { 1360 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1361 } 1362 #else 1363 static inline bool br_allowed_ingress(const struct net_bridge *br, 1364 struct net_bridge_vlan_group *vg, 1365 struct sk_buff *skb, 1366 u16 *vid, u8 *state) 1367 { 1368 return true; 1369 } 1370 1371 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1372 const struct sk_buff *skb) 1373 { 1374 return true; 1375 } 1376 1377 static inline bool br_should_learn(struct net_bridge_port *p, 1378 struct sk_buff *skb, u16 *vid) 1379 { 1380 return true; 1381 } 1382 1383 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1384 const struct net_bridge_port *port, 1385 struct net_bridge_vlan_group *vg, 1386 struct sk_buff *skb) 1387 { 1388 return skb; 1389 } 1390 1391 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1392 bool *changed, struct netlink_ext_ack *extack) 1393 { 1394 *changed = false; 1395 return -EOPNOTSUPP; 1396 } 1397 1398 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1399 { 1400 return -EOPNOTSUPP; 1401 } 1402 1403 static inline void br_vlan_flush(struct net_bridge *br) 1404 { 1405 } 1406 1407 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1408 { 1409 } 1410 1411 static inline int br_vlan_init(struct net_bridge *br) 1412 { 1413 return 0; 1414 } 1415 1416 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1417 bool *changed, struct netlink_ext_ack *extack) 1418 { 1419 *changed = false; 1420 return -EOPNOTSUPP; 1421 } 1422 1423 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1424 { 1425 return -EOPNOTSUPP; 1426 } 1427 1428 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1429 { 1430 } 1431 1432 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1433 u16 vid) 1434 { 1435 return NULL; 1436 } 1437 1438 static inline int nbp_vlan_init(struct net_bridge_port *port, 1439 struct netlink_ext_ack *extack) 1440 { 1441 return 0; 1442 } 1443 1444 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1445 { 1446 return 0; 1447 } 1448 1449 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1450 { 1451 return 0; 1452 } 1453 1454 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1455 unsigned long val, 1456 struct netlink_ext_ack *extack) 1457 { 1458 return -EOPNOTSUPP; 1459 } 1460 1461 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1462 u32 filter_mask) 1463 { 1464 return 0; 1465 } 1466 1467 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1468 struct net_device_path_ctx *ctx, 1469 struct net_device_path *path) 1470 { 1471 } 1472 1473 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1474 struct net_bridge_port *dst, 1475 struct net_device_path *path) 1476 { 1477 return 0; 1478 } 1479 1480 static inline struct net_bridge_vlan_group *br_vlan_group( 1481 const struct net_bridge *br) 1482 { 1483 return NULL; 1484 } 1485 1486 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1487 const struct net_bridge_port *p) 1488 { 1489 return NULL; 1490 } 1491 1492 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1493 const struct net_bridge *br) 1494 { 1495 return NULL; 1496 } 1497 1498 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1499 const struct net_bridge_port *p) 1500 { 1501 return NULL; 1502 } 1503 1504 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1505 struct pcpu_sw_netstats *stats) 1506 { 1507 } 1508 1509 static inline void br_vlan_port_event(struct net_bridge_port *p, 1510 unsigned long event) 1511 { 1512 } 1513 1514 static inline int br_vlan_bridge_event(struct net_device *dev, 1515 unsigned long event, void *ptr) 1516 { 1517 return 0; 1518 } 1519 1520 static inline void br_vlan_rtnl_init(void) 1521 { 1522 } 1523 1524 static inline void br_vlan_rtnl_uninit(void) 1525 { 1526 } 1527 1528 static inline void br_vlan_notify(const struct net_bridge *br, 1529 const struct net_bridge_port *p, 1530 u16 vid, u16 vid_range, 1531 int cmd) 1532 { 1533 } 1534 1535 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1536 const struct net_bridge_vlan *range_end) 1537 { 1538 return true; 1539 } 1540 #endif 1541 1542 /* br_vlan_options.c */ 1543 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1544 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1545 const struct net_bridge_vlan *range_end); 1546 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1547 size_t br_vlan_opts_nl_size(void); 1548 int br_vlan_process_options(const struct net_bridge *br, 1549 const struct net_bridge_port *p, 1550 struct net_bridge_vlan *range_start, 1551 struct net_bridge_vlan *range_end, 1552 struct nlattr **tb, 1553 struct netlink_ext_ack *extack); 1554 1555 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1556 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1557 { 1558 return READ_ONCE(v->state); 1559 } 1560 1561 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1562 { 1563 WRITE_ONCE(v->state, state); 1564 } 1565 1566 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1567 { 1568 return READ_ONCE(vg->pvid_state); 1569 } 1570 1571 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1572 u8 state) 1573 { 1574 WRITE_ONCE(vg->pvid_state, state); 1575 } 1576 1577 /* learn_allow is true at ingress and false at egress */ 1578 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1579 { 1580 switch (state) { 1581 case BR_STATE_LEARNING: 1582 return learn_allow; 1583 case BR_STATE_FORWARDING: 1584 return true; 1585 default: 1586 return false; 1587 } 1588 } 1589 #endif 1590 1591 struct nf_br_ops { 1592 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1593 }; 1594 extern const struct nf_br_ops __rcu *nf_br_ops; 1595 1596 /* br_netfilter.c */ 1597 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1598 int br_nf_core_init(void); 1599 void br_nf_core_fini(void); 1600 void br_netfilter_rtable_init(struct net_bridge *); 1601 #else 1602 static inline int br_nf_core_init(void) { return 0; } 1603 static inline void br_nf_core_fini(void) {} 1604 #define br_netfilter_rtable_init(x) 1605 #endif 1606 1607 /* br_stp.c */ 1608 void br_set_state(struct net_bridge_port *p, unsigned int state); 1609 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1610 void br_init_port(struct net_bridge_port *p); 1611 void br_become_designated_port(struct net_bridge_port *p); 1612 1613 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1614 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1615 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1616 int br_set_max_age(struct net_bridge *br, unsigned long x); 1617 int __set_ageing_time(struct net_device *dev, unsigned long t); 1618 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1619 1620 1621 /* br_stp_if.c */ 1622 void br_stp_enable_bridge(struct net_bridge *br); 1623 void br_stp_disable_bridge(struct net_bridge *br); 1624 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1625 struct netlink_ext_ack *extack); 1626 void br_stp_enable_port(struct net_bridge_port *p); 1627 void br_stp_disable_port(struct net_bridge_port *p); 1628 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1629 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1630 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1631 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1632 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1633 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1634 1635 /* br_stp_bpdu.c */ 1636 struct stp_proto; 1637 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1638 struct net_device *dev); 1639 1640 /* br_stp_timer.c */ 1641 void br_stp_timer_init(struct net_bridge *br); 1642 void br_stp_port_timer_init(struct net_bridge_port *p); 1643 unsigned long br_timer_value(const struct timer_list *timer); 1644 1645 /* br.c */ 1646 #if IS_ENABLED(CONFIG_ATM_LANE) 1647 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1648 #endif 1649 1650 /* br_mrp.c */ 1651 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1652 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1653 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1654 bool br_mrp_enabled(struct net_bridge *br); 1655 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1656 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1657 #else 1658 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1659 struct nlattr *attr, int cmd, 1660 struct netlink_ext_ack *extack) 1661 { 1662 return -EOPNOTSUPP; 1663 } 1664 1665 static inline bool br_mrp_enabled(struct net_bridge *br) 1666 { 1667 return false; 1668 } 1669 1670 static inline void br_mrp_port_del(struct net_bridge *br, 1671 struct net_bridge_port *p) 1672 { 1673 } 1674 1675 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1676 { 1677 return 0; 1678 } 1679 1680 #endif 1681 1682 /* br_cfm.c */ 1683 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1684 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1685 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1686 bool br_cfm_created(struct net_bridge *br); 1687 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1688 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1689 int br_cfm_status_fill_info(struct sk_buff *skb, 1690 struct net_bridge *br, 1691 bool getlink); 1692 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1693 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1694 #else 1695 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1696 struct nlattr *attr, int cmd, 1697 struct netlink_ext_ack *extack) 1698 { 1699 return -EOPNOTSUPP; 1700 } 1701 1702 static inline bool br_cfm_created(struct net_bridge *br) 1703 { 1704 return false; 1705 } 1706 1707 static inline void br_cfm_port_del(struct net_bridge *br, 1708 struct net_bridge_port *p) 1709 { 1710 } 1711 1712 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1713 { 1714 return -EOPNOTSUPP; 1715 } 1716 1717 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1718 struct net_bridge *br, 1719 bool getlink) 1720 { 1721 return -EOPNOTSUPP; 1722 } 1723 1724 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1725 { 1726 return -EOPNOTSUPP; 1727 } 1728 1729 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1730 { 1731 return -EOPNOTSUPP; 1732 } 1733 #endif 1734 1735 /* br_netlink.c */ 1736 extern struct rtnl_link_ops br_link_ops; 1737 int br_netlink_init(void); 1738 void br_netlink_fini(void); 1739 void br_ifinfo_notify(int event, const struct net_bridge *br, 1740 const struct net_bridge_port *port); 1741 void br_info_notify(int event, const struct net_bridge *br, 1742 const struct net_bridge_port *port, u32 filter); 1743 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1744 struct netlink_ext_ack *extack); 1745 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1746 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1747 u32 filter_mask, int nlflags); 1748 int br_process_vlan_info(struct net_bridge *br, 1749 struct net_bridge_port *p, int cmd, 1750 struct bridge_vlan_info *vinfo_curr, 1751 struct bridge_vlan_info **vinfo_last, 1752 bool *changed, 1753 struct netlink_ext_ack *extack); 1754 1755 #ifdef CONFIG_SYSFS 1756 /* br_sysfs_if.c */ 1757 extern const struct sysfs_ops brport_sysfs_ops; 1758 int br_sysfs_addif(struct net_bridge_port *p); 1759 int br_sysfs_renameif(struct net_bridge_port *p); 1760 1761 /* br_sysfs_br.c */ 1762 int br_sysfs_addbr(struct net_device *dev); 1763 void br_sysfs_delbr(struct net_device *dev); 1764 1765 #else 1766 1767 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1768 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1769 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1770 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1771 #endif /* CONFIG_SYSFS */ 1772 1773 /* br_switchdev.c */ 1774 #ifdef CONFIG_NET_SWITCHDEV 1775 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1776 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1777 struct sk_buff *skb); 1778 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1779 const struct sk_buff *skb); 1780 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1781 unsigned long flags, 1782 unsigned long mask, 1783 struct netlink_ext_ack *extack); 1784 void br_switchdev_fdb_notify(struct net_bridge *br, 1785 const struct net_bridge_fdb_entry *fdb, int type); 1786 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1787 struct netlink_ext_ack *extack); 1788 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1789 1790 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1791 { 1792 skb->offload_fwd_mark = 0; 1793 } 1794 #else 1795 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1796 { 1797 return 0; 1798 } 1799 1800 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1801 struct sk_buff *skb) 1802 { 1803 } 1804 1805 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1806 const struct sk_buff *skb) 1807 { 1808 return true; 1809 } 1810 1811 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1812 unsigned long flags, 1813 unsigned long mask, 1814 struct netlink_ext_ack *extack) 1815 { 1816 return 0; 1817 } 1818 1819 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1820 u16 vid, u16 flags, 1821 struct netlink_ext_ack *extack) 1822 { 1823 return -EOPNOTSUPP; 1824 } 1825 1826 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1827 { 1828 return -EOPNOTSUPP; 1829 } 1830 1831 static inline void 1832 br_switchdev_fdb_notify(struct net_bridge *br, 1833 const struct net_bridge_fdb_entry *fdb, int type) 1834 { 1835 } 1836 1837 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1838 { 1839 } 1840 #endif /* CONFIG_NET_SWITCHDEV */ 1841 1842 /* br_arp_nd_proxy.c */ 1843 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1844 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1845 u16 vid, struct net_bridge_port *p); 1846 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1847 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1848 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1849 #endif 1850