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