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 struct br_vlan_stats { 93 u64 rx_bytes; 94 u64 rx_packets; 95 u64 tx_bytes; 96 u64 tx_packets; 97 struct u64_stats_sync syncp; 98 }; 99 100 struct br_tunnel_info { 101 __be64 tunnel_id; 102 struct metadata_dst *tunnel_dst; 103 }; 104 105 /* private vlan flags */ 106 enum { 107 BR_VLFLAG_PER_PORT_STATS = BIT(0), 108 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 109 }; 110 111 /** 112 * struct net_bridge_vlan - per-vlan entry 113 * 114 * @vnode: rhashtable member 115 * @vid: VLAN id 116 * @flags: bridge vlan flags 117 * @priv_flags: private (in-kernel) bridge vlan flags 118 * @state: STP state (e.g. blocking, learning, forwarding) 119 * @stats: per-cpu VLAN statistics 120 * @br: if MASTER flag set, this points to a bridge struct 121 * @port: if MASTER flag unset, this points to a port struct 122 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 123 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 124 * for this VLAN entry 125 * @vlist: sorted list of VLAN entries 126 * @rcu: used for entry destruction 127 * 128 * This structure is shared between the global per-VLAN entries contained in 129 * the bridge rhashtable and the local per-port per-VLAN entries contained in 130 * the port's rhashtable. The union entries should be interpreted depending on 131 * the entry flags that are set. 132 */ 133 struct net_bridge_vlan { 134 struct rhash_head vnode; 135 struct rhash_head tnode; 136 u16 vid; 137 u16 flags; 138 u16 priv_flags; 139 u8 state; 140 struct br_vlan_stats __percpu *stats; 141 union { 142 struct net_bridge *br; 143 struct net_bridge_port *port; 144 }; 145 union { 146 refcount_t refcnt; 147 struct net_bridge_vlan *brvlan; 148 }; 149 150 struct br_tunnel_info tinfo; 151 152 struct list_head vlist; 153 154 struct rcu_head rcu; 155 }; 156 157 /** 158 * struct net_bridge_vlan_group 159 * 160 * @vlan_hash: VLAN entry rhashtable 161 * @vlan_list: sorted VLAN entry list 162 * @num_vlans: number of total VLAN entries 163 * @pvid: PVID VLAN id 164 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 165 * 166 * IMPORTANT: Be careful when checking if there're VLAN entries using list 167 * primitives because the bridge can have entries in its list which 168 * are just for global context but not for filtering, i.e. they have 169 * the master flag set but not the brentry flag. If you have to check 170 * if there're "real" entries in the bridge please test @num_vlans 171 */ 172 struct net_bridge_vlan_group { 173 struct rhashtable vlan_hash; 174 struct rhashtable tunnel_hash; 175 struct list_head vlan_list; 176 u16 num_vlans; 177 u16 pvid; 178 u8 pvid_state; 179 }; 180 181 /* bridge fdb flags */ 182 enum { 183 BR_FDB_LOCAL, 184 BR_FDB_STATIC, 185 BR_FDB_STICKY, 186 BR_FDB_ADDED_BY_USER, 187 BR_FDB_ADDED_BY_EXT_LEARN, 188 BR_FDB_OFFLOADED, 189 BR_FDB_NOTIFY, 190 BR_FDB_NOTIFY_INACTIVE 191 }; 192 193 struct net_bridge_fdb_key { 194 mac_addr addr; 195 u16 vlan_id; 196 }; 197 198 struct net_bridge_fdb_entry { 199 struct rhash_head rhnode; 200 struct net_bridge_port *dst; 201 202 struct net_bridge_fdb_key key; 203 struct hlist_node fdb_node; 204 unsigned long flags; 205 206 /* write-heavy members should not affect lookups */ 207 unsigned long updated ____cacheline_aligned_in_smp; 208 unsigned long used; 209 210 struct rcu_head rcu; 211 }; 212 213 #define MDB_PG_FLAGS_PERMANENT BIT(0) 214 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 216 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 217 #define MDB_PG_FLAGS_BLOCKED BIT(4) 218 219 #define PG_SRC_ENT_LIMIT 32 220 221 #define BR_SGRP_F_DELETE BIT(0) 222 #define BR_SGRP_F_SEND BIT(1) 223 #define BR_SGRP_F_INSTALLED BIT(2) 224 225 struct net_bridge_mcast_gc { 226 struct hlist_node gc_node; 227 void (*destroy)(struct net_bridge_mcast_gc *gc); 228 }; 229 230 struct net_bridge_group_src { 231 struct hlist_node node; 232 233 struct br_ip addr; 234 struct net_bridge_port_group *pg; 235 u8 flags; 236 u8 src_query_rexmit_cnt; 237 struct timer_list timer; 238 239 struct net_bridge *br; 240 struct net_bridge_mcast_gc mcast_gc; 241 struct rcu_head rcu; 242 }; 243 244 struct net_bridge_port_group_sg_key { 245 struct net_bridge_port *port; 246 struct br_ip addr; 247 }; 248 249 struct net_bridge_port_group { 250 struct net_bridge_port_group __rcu *next; 251 struct net_bridge_port_group_sg_key key; 252 unsigned char eth_addr[ETH_ALEN] __aligned(2); 253 unsigned char flags; 254 unsigned char filter_mode; 255 unsigned char grp_query_rexmit_cnt; 256 unsigned char rt_protocol; 257 258 struct hlist_head src_list; 259 unsigned int src_ents; 260 struct timer_list timer; 261 struct timer_list rexmit_timer; 262 struct hlist_node mglist; 263 264 struct rhash_head rhnode; 265 struct net_bridge_mcast_gc mcast_gc; 266 struct rcu_head rcu; 267 }; 268 269 struct net_bridge_mdb_entry { 270 struct rhash_head rhnode; 271 struct net_bridge *br; 272 struct net_bridge_port_group __rcu *ports; 273 struct br_ip addr; 274 bool host_joined; 275 276 struct timer_list timer; 277 struct hlist_node mdb_node; 278 279 struct net_bridge_mcast_gc mcast_gc; 280 struct rcu_head rcu; 281 }; 282 283 struct net_bridge_port { 284 struct net_bridge *br; 285 struct net_device *dev; 286 struct list_head list; 287 288 unsigned long flags; 289 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 290 struct net_bridge_vlan_group __rcu *vlgrp; 291 #endif 292 struct net_bridge_port __rcu *backup_port; 293 294 /* STP */ 295 u8 priority; 296 u8 state; 297 u16 port_no; 298 unsigned char topology_change_ack; 299 unsigned char config_pending; 300 port_id port_id; 301 port_id designated_port; 302 bridge_id designated_root; 303 bridge_id designated_bridge; 304 u32 path_cost; 305 u32 designated_cost; 306 unsigned long designated_age; 307 308 struct timer_list forward_delay_timer; 309 struct timer_list hold_timer; 310 struct timer_list message_age_timer; 311 struct kobject kobj; 312 struct rcu_head rcu; 313 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 315 struct bridge_mcast_own_query ip4_own_query; 316 #if IS_ENABLED(CONFIG_IPV6) 317 struct bridge_mcast_own_query ip6_own_query; 318 #endif /* IS_ENABLED(CONFIG_IPV6) */ 319 unsigned char multicast_router; 320 struct bridge_mcast_stats __percpu *mcast_stats; 321 struct timer_list multicast_router_timer; 322 struct hlist_head mglist; 323 struct hlist_node rlist; 324 #endif 325 326 #ifdef CONFIG_SYSFS 327 char sysfs_name[IFNAMSIZ]; 328 #endif 329 330 #ifdef CONFIG_NET_POLL_CONTROLLER 331 struct netpoll *np; 332 #endif 333 #ifdef CONFIG_NET_SWITCHDEV 334 int offload_fwd_mark; 335 #endif 336 u16 group_fwd_mask; 337 u16 backup_redirected_cnt; 338 339 struct bridge_stp_xstats stp_xstats; 340 }; 341 342 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 343 344 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 345 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 346 347 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 348 { 349 return rcu_dereference(dev->rx_handler_data); 350 } 351 352 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 353 { 354 return netif_is_bridge_port(dev) ? 355 rtnl_dereference(dev->rx_handler_data) : NULL; 356 } 357 358 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 359 { 360 return netif_is_bridge_port(dev) ? 361 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 362 } 363 364 enum net_bridge_opts { 365 BROPT_VLAN_ENABLED, 366 BROPT_VLAN_STATS_ENABLED, 367 BROPT_NF_CALL_IPTABLES, 368 BROPT_NF_CALL_IP6TABLES, 369 BROPT_NF_CALL_ARPTABLES, 370 BROPT_GROUP_ADDR_SET, 371 BROPT_MULTICAST_ENABLED, 372 BROPT_MULTICAST_QUERIER, 373 BROPT_MULTICAST_QUERY_USE_IFADDR, 374 BROPT_MULTICAST_STATS_ENABLED, 375 BROPT_HAS_IPV6_ADDR, 376 BROPT_NEIGH_SUPPRESS_ENABLED, 377 BROPT_MTU_SET_BY_USER, 378 BROPT_VLAN_STATS_PER_PORT, 379 BROPT_NO_LL_LEARN, 380 BROPT_VLAN_BRIDGE_BINDING, 381 }; 382 383 struct net_bridge { 384 spinlock_t lock; 385 spinlock_t hash_lock; 386 struct hlist_head frame_type_list; 387 struct net_device *dev; 388 struct pcpu_sw_netstats __percpu *stats; 389 unsigned long options; 390 /* These fields are accessed on each packet */ 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 392 __be16 vlan_proto; 393 u16 default_pvid; 394 struct net_bridge_vlan_group __rcu *vlgrp; 395 #endif 396 397 struct rhashtable fdb_hash_tbl; 398 struct list_head port_list; 399 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 400 union { 401 struct rtable fake_rtable; 402 struct rt6_info fake_rt6_info; 403 }; 404 #endif 405 u16 group_fwd_mask; 406 u16 group_fwd_mask_required; 407 408 /* STP */ 409 bridge_id designated_root; 410 bridge_id bridge_id; 411 unsigned char topology_change; 412 unsigned char topology_change_detected; 413 u16 root_port; 414 unsigned long max_age; 415 unsigned long hello_time; 416 unsigned long forward_delay; 417 unsigned long ageing_time; 418 unsigned long bridge_max_age; 419 unsigned long bridge_hello_time; 420 unsigned long bridge_forward_delay; 421 unsigned long bridge_ageing_time; 422 u32 root_path_cost; 423 424 u8 group_addr[ETH_ALEN]; 425 426 enum { 427 BR_NO_STP, /* no spanning tree */ 428 BR_KERNEL_STP, /* old STP in kernel */ 429 BR_USER_STP, /* new RSTP in userspace */ 430 } stp_enabled; 431 432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 433 434 u32 hash_max; 435 436 u32 multicast_last_member_count; 437 u32 multicast_startup_query_count; 438 439 u8 multicast_igmp_version; 440 u8 multicast_router; 441 #if IS_ENABLED(CONFIG_IPV6) 442 u8 multicast_mld_version; 443 #endif 444 spinlock_t multicast_lock; 445 unsigned long multicast_last_member_interval; 446 unsigned long multicast_membership_interval; 447 unsigned long multicast_querier_interval; 448 unsigned long multicast_query_interval; 449 unsigned long multicast_query_response_interval; 450 unsigned long multicast_startup_query_interval; 451 452 struct rhashtable mdb_hash_tbl; 453 struct rhashtable sg_port_tbl; 454 455 struct hlist_head mcast_gc_list; 456 struct hlist_head mdb_list; 457 struct hlist_head router_list; 458 459 struct timer_list multicast_router_timer; 460 struct bridge_mcast_other_query ip4_other_query; 461 struct bridge_mcast_own_query ip4_own_query; 462 struct bridge_mcast_querier ip4_querier; 463 struct bridge_mcast_stats __percpu *mcast_stats; 464 #if IS_ENABLED(CONFIG_IPV6) 465 struct bridge_mcast_other_query ip6_other_query; 466 struct bridge_mcast_own_query ip6_own_query; 467 struct bridge_mcast_querier ip6_querier; 468 #endif /* IS_ENABLED(CONFIG_IPV6) */ 469 struct work_struct mcast_gc_work; 470 #endif 471 472 struct timer_list hello_timer; 473 struct timer_list tcn_timer; 474 struct timer_list topology_change_timer; 475 struct delayed_work gc_work; 476 struct kobject *ifobj; 477 u32 auto_cnt; 478 479 #ifdef CONFIG_NET_SWITCHDEV 480 int offload_fwd_mark; 481 #endif 482 struct hlist_head fdb_list; 483 484 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 485 struct list_head mrp_list; 486 #endif 487 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 488 struct hlist_head mep_list; 489 #endif 490 }; 491 492 struct br_input_skb_cb { 493 struct net_device *brdev; 494 495 u16 frag_max_size; 496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 497 u8 igmp; 498 u8 mrouters_only:1; 499 #endif 500 u8 proxyarp_replied:1; 501 u8 src_port_isolated:1; 502 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 503 u8 vlan_filtered:1; 504 #endif 505 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 506 u8 br_netfilter_broute:1; 507 #endif 508 509 #ifdef CONFIG_NET_SWITCHDEV 510 int offload_fwd_mark; 511 #endif 512 }; 513 514 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 515 516 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 517 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 518 #else 519 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 520 #endif 521 522 #define br_printk(level, br, format, args...) \ 523 printk(level "%s: " format, (br)->dev->name, ##args) 524 525 #define br_err(__br, format, args...) \ 526 br_printk(KERN_ERR, __br, format, ##args) 527 #define br_warn(__br, format, args...) \ 528 br_printk(KERN_WARNING, __br, format, ##args) 529 #define br_notice(__br, format, args...) \ 530 br_printk(KERN_NOTICE, __br, format, ##args) 531 #define br_info(__br, format, args...) \ 532 br_printk(KERN_INFO, __br, format, ##args) 533 534 #define br_debug(br, format, args...) \ 535 pr_debug("%s: " format, (br)->dev->name, ##args) 536 537 /* called under bridge lock */ 538 static inline int br_is_root_bridge(const struct net_bridge *br) 539 { 540 return !memcmp(&br->bridge_id, &br->designated_root, 8); 541 } 542 543 /* check if a VLAN entry is global */ 544 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 545 { 546 return v->flags & BRIDGE_VLAN_INFO_MASTER; 547 } 548 549 /* check if a VLAN entry is used by the bridge */ 550 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 551 { 552 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 553 } 554 555 /* check if we should use the vlan entry, returns false if it's only context */ 556 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 557 { 558 if (br_vlan_is_master(v)) { 559 if (br_vlan_is_brentry(v)) 560 return true; 561 else 562 return false; 563 } 564 565 return true; 566 } 567 568 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 569 { 570 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 571 } 572 573 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 574 { 575 bool ret = vid > 0 && vid < VLAN_VID_MASK; 576 577 if (!ret) 578 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 579 580 return ret; 581 } 582 583 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 584 const struct bridge_vlan_info *last, 585 struct netlink_ext_ack *extack) 586 { 587 /* pvid flag is not allowed in ranges */ 588 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 589 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 590 return false; 591 } 592 593 /* when cur is the range end, check if: 594 * - it has range start flag 595 * - range ids are invalid (end is equal to or before start) 596 */ 597 if (last) { 598 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 599 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 600 return false; 601 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 602 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 603 return false; 604 } else if (cur->vid <= last->vid) { 605 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 606 return false; 607 } 608 } 609 610 /* check for required range flags */ 611 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 612 BRIDGE_VLAN_INFO_RANGE_END))) { 613 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 614 return false; 615 } 616 617 return true; 618 } 619 620 static inline int br_afspec_cmd_to_rtm(int cmd) 621 { 622 switch (cmd) { 623 case RTM_SETLINK: 624 return RTM_NEWVLAN; 625 case RTM_DELLINK: 626 return RTM_DELVLAN; 627 } 628 629 return 0; 630 } 631 632 static inline int br_opt_get(const struct net_bridge *br, 633 enum net_bridge_opts opt) 634 { 635 return test_bit(opt, &br->options); 636 } 637 638 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 639 struct netlink_ext_ack *extack); 640 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 641 int br_boolopt_multi_toggle(struct net_bridge *br, 642 struct br_boolopt_multi *bm, 643 struct netlink_ext_ack *extack); 644 void br_boolopt_multi_get(const struct net_bridge *br, 645 struct br_boolopt_multi *bm); 646 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 647 648 /* br_device.c */ 649 void br_dev_setup(struct net_device *dev); 650 void br_dev_delete(struct net_device *dev, struct list_head *list); 651 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 652 #ifdef CONFIG_NET_POLL_CONTROLLER 653 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 654 struct sk_buff *skb) 655 { 656 netpoll_send_skb(p->np, skb); 657 } 658 659 int br_netpoll_enable(struct net_bridge_port *p); 660 void br_netpoll_disable(struct net_bridge_port *p); 661 #else 662 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 663 struct sk_buff *skb) 664 { 665 } 666 667 static inline int br_netpoll_enable(struct net_bridge_port *p) 668 { 669 return 0; 670 } 671 672 static inline void br_netpoll_disable(struct net_bridge_port *p) 673 { 674 } 675 #endif 676 677 /* br_fdb.c */ 678 int br_fdb_init(void); 679 void br_fdb_fini(void); 680 int br_fdb_hash_init(struct net_bridge *br); 681 void br_fdb_hash_fini(struct net_bridge *br); 682 void br_fdb_flush(struct net_bridge *br); 683 void br_fdb_find_delete_local(struct net_bridge *br, 684 const struct net_bridge_port *p, 685 const unsigned char *addr, u16 vid); 686 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 687 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 688 void br_fdb_cleanup(struct work_struct *work); 689 void br_fdb_delete_by_port(struct net_bridge *br, 690 const struct net_bridge_port *p, u16 vid, int do_all); 691 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 692 const unsigned char *addr, 693 __u16 vid); 694 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 695 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 696 unsigned long off); 697 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 698 const unsigned char *addr, u16 vid); 699 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 700 const unsigned char *addr, u16 vid, unsigned long flags); 701 702 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 703 struct net_device *dev, const unsigned char *addr, u16 vid); 704 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 705 const unsigned char *addr, u16 vid, u16 nlh_flags, 706 struct netlink_ext_ack *extack); 707 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 708 struct net_device *dev, struct net_device *fdev, int *idx); 709 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 710 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 711 struct netlink_ext_ack *extack); 712 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 713 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 714 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 715 const unsigned char *addr, u16 vid, 716 bool swdev_notify); 717 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 718 const unsigned char *addr, u16 vid, 719 bool swdev_notify); 720 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 721 const unsigned char *addr, u16 vid, bool offloaded); 722 723 /* br_forward.c */ 724 enum br_pkt_type { 725 BR_PKT_UNICAST, 726 BR_PKT_MULTICAST, 727 BR_PKT_BROADCAST 728 }; 729 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 730 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 731 bool local_rcv, bool local_orig); 732 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 733 void br_flood(struct net_bridge *br, struct sk_buff *skb, 734 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 735 736 /* return true if both source port and dest port are isolated */ 737 static inline bool br_skb_isolated(const struct net_bridge_port *to, 738 const struct sk_buff *skb) 739 { 740 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 741 (to->flags & BR_ISOLATED); 742 } 743 744 /* br_if.c */ 745 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 746 int br_add_bridge(struct net *net, const char *name); 747 int br_del_bridge(struct net *net, const char *name); 748 int br_add_if(struct net_bridge *br, struct net_device *dev, 749 struct netlink_ext_ack *extack); 750 int br_del_if(struct net_bridge *br, struct net_device *dev); 751 void br_mtu_auto_adjust(struct net_bridge *br); 752 netdev_features_t br_features_recompute(struct net_bridge *br, 753 netdev_features_t features); 754 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 755 void br_manage_promisc(struct net_bridge *br); 756 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 757 758 /* br_input.c */ 759 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 760 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 761 762 struct br_frame_type { 763 __be16 type; 764 int (*frame_handler)(struct net_bridge_port *port, 765 struct sk_buff *skb); 766 struct hlist_node list; 767 }; 768 769 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 770 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 771 772 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 773 { 774 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 775 } 776 777 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 778 { 779 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 780 } 781 782 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 783 { 784 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 785 } 786 787 static inline struct net_bridge_port * 788 br_port_get_check_rtnl(const struct net_device *dev) 789 { 790 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 791 } 792 793 /* br_ioctl.c */ 794 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 795 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 796 void __user *arg); 797 798 /* br_multicast.c */ 799 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 800 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 801 struct sk_buff *skb, u16 vid); 802 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 803 struct sk_buff *skb, u16 vid); 804 int br_multicast_add_port(struct net_bridge_port *port); 805 void br_multicast_del_port(struct net_bridge_port *port); 806 void br_multicast_enable_port(struct net_bridge_port *port); 807 void br_multicast_disable_port(struct net_bridge_port *port); 808 void br_multicast_init(struct net_bridge *br); 809 void br_multicast_open(struct net_bridge *br); 810 void br_multicast_stop(struct net_bridge *br); 811 void br_multicast_dev_del(struct net_bridge *br); 812 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 813 struct sk_buff *skb, bool local_rcv, bool local_orig); 814 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 815 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 816 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 817 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 818 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 819 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 820 #if IS_ENABLED(CONFIG_IPV6) 821 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 822 #endif 823 struct net_bridge_mdb_entry * 824 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 825 struct net_bridge_mdb_entry * 826 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 827 struct net_bridge_port_group * 828 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 829 struct net_bridge_port_group __rcu *next, 830 unsigned char flags, const unsigned char *src, 831 u8 filter_mode, u8 rt_protocol); 832 int br_mdb_hash_init(struct net_bridge *br); 833 void br_mdb_hash_fini(struct net_bridge *br); 834 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 835 struct net_bridge_port_group *pg, int type); 836 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 837 int type); 838 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 839 struct net_bridge_port_group *pg, 840 struct net_bridge_port_group __rcu **pp); 841 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 842 const struct sk_buff *skb, u8 type, u8 dir); 843 int br_multicast_init_stats(struct net_bridge *br); 844 void br_multicast_uninit_stats(struct net_bridge *br); 845 void br_multicast_get_stats(const struct net_bridge *br, 846 const struct net_bridge_port *p, 847 struct br_mcast_stats *dest); 848 void br_mdb_init(void); 849 void br_mdb_uninit(void); 850 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 851 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 852 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 853 u8 filter_mode); 854 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 855 struct net_bridge_port_group *sg); 856 857 #define mlock_dereference(X, br) \ 858 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 859 860 static inline bool br_multicast_is_router(struct net_bridge *br) 861 { 862 return br->multicast_router == 2 || 863 (br->multicast_router == 1 && 864 timer_pending(&br->multicast_router_timer)); 865 } 866 867 static inline bool 868 __br_multicast_querier_exists(struct net_bridge *br, 869 struct bridge_mcast_other_query *querier, 870 const bool is_ipv6) 871 { 872 bool own_querier_enabled; 873 874 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 875 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 876 own_querier_enabled = false; 877 else 878 own_querier_enabled = true; 879 } else { 880 own_querier_enabled = false; 881 } 882 883 return time_is_before_jiffies(querier->delay_time) && 884 (own_querier_enabled || timer_pending(&querier->timer)); 885 } 886 887 static inline bool br_multicast_querier_exists(struct net_bridge *br, 888 struct ethhdr *eth) 889 { 890 switch (eth->h_proto) { 891 case (htons(ETH_P_IP)): 892 return __br_multicast_querier_exists(br, 893 &br->ip4_other_query, false); 894 #if IS_ENABLED(CONFIG_IPV6) 895 case (htons(ETH_P_IPV6)): 896 return __br_multicast_querier_exists(br, 897 &br->ip6_other_query, true); 898 #endif 899 default: 900 return false; 901 } 902 } 903 904 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 905 { 906 switch (ip->proto) { 907 case htons(ETH_P_IP): 908 return ipv4_is_zeronet(ip->src.ip4); 909 #if IS_ENABLED(CONFIG_IPV6) 910 case htons(ETH_P_IPV6): 911 return ipv6_addr_any(&ip->src.ip6); 912 #endif 913 default: 914 return false; 915 } 916 } 917 918 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 919 __be16 proto) 920 { 921 switch (proto) { 922 case htons(ETH_P_IP): 923 return !!(br->multicast_igmp_version == 3); 924 #if IS_ENABLED(CONFIG_IPV6) 925 case htons(ETH_P_IPV6): 926 return !!(br->multicast_mld_version == 2); 927 #endif 928 default: 929 return false; 930 } 931 } 932 933 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 934 { 935 return BR_INPUT_SKB_CB(skb)->igmp; 936 } 937 938 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 939 { 940 return br->multicast_last_member_interval * 941 br->multicast_last_member_count; 942 } 943 944 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 945 { 946 /* use the RFC default of 2 for QRV */ 947 return 2 * br->multicast_query_interval + 948 br->multicast_query_response_interval; 949 } 950 #else 951 static inline int br_multicast_rcv(struct net_bridge *br, 952 struct net_bridge_port *port, 953 struct sk_buff *skb, 954 u16 vid) 955 { 956 return 0; 957 } 958 959 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 960 struct sk_buff *skb, u16 vid) 961 { 962 return NULL; 963 } 964 965 static inline int br_multicast_add_port(struct net_bridge_port *port) 966 { 967 return 0; 968 } 969 970 static inline void br_multicast_del_port(struct net_bridge_port *port) 971 { 972 } 973 974 static inline void br_multicast_enable_port(struct net_bridge_port *port) 975 { 976 } 977 978 static inline void br_multicast_disable_port(struct net_bridge_port *port) 979 { 980 } 981 982 static inline void br_multicast_init(struct net_bridge *br) 983 { 984 } 985 986 static inline void br_multicast_open(struct net_bridge *br) 987 { 988 } 989 990 static inline void br_multicast_stop(struct net_bridge *br) 991 { 992 } 993 994 static inline void br_multicast_dev_del(struct net_bridge *br) 995 { 996 } 997 998 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 999 struct sk_buff *skb, 1000 bool local_rcv, bool local_orig) 1001 { 1002 } 1003 1004 static inline bool br_multicast_is_router(struct net_bridge *br) 1005 { 1006 return false; 1007 } 1008 1009 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1010 struct ethhdr *eth) 1011 { 1012 return false; 1013 } 1014 1015 static inline void br_mdb_init(void) 1016 { 1017 } 1018 1019 static inline void br_mdb_uninit(void) 1020 { 1021 } 1022 1023 static inline int br_mdb_hash_init(struct net_bridge *br) 1024 { 1025 return 0; 1026 } 1027 1028 static inline void br_mdb_hash_fini(struct net_bridge *br) 1029 { 1030 } 1031 1032 static inline void br_multicast_count(struct net_bridge *br, 1033 const struct net_bridge_port *p, 1034 const struct sk_buff *skb, 1035 u8 type, u8 dir) 1036 { 1037 } 1038 1039 static inline int br_multicast_init_stats(struct net_bridge *br) 1040 { 1041 return 0; 1042 } 1043 1044 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1045 { 1046 } 1047 1048 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1049 { 1050 return 0; 1051 } 1052 #endif 1053 1054 /* br_vlan.c */ 1055 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1056 bool br_allowed_ingress(const struct net_bridge *br, 1057 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1058 u16 *vid, u8 *state); 1059 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1060 const struct sk_buff *skb); 1061 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1062 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1063 const struct net_bridge_port *port, 1064 struct net_bridge_vlan_group *vg, 1065 struct sk_buff *skb); 1066 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1067 bool *changed, struct netlink_ext_ack *extack); 1068 int br_vlan_delete(struct net_bridge *br, u16 vid); 1069 void br_vlan_flush(struct net_bridge *br); 1070 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1071 void br_recalculate_fwd_mask(struct net_bridge *br); 1072 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1073 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1074 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1075 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1076 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1077 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1078 int br_vlan_init(struct net_bridge *br); 1079 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1080 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1081 struct netlink_ext_ack *extack); 1082 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1083 bool *changed, struct netlink_ext_ack *extack); 1084 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1085 void nbp_vlan_flush(struct net_bridge_port *port); 1086 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1087 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1088 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1089 struct br_vlan_stats *stats); 1090 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1091 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1092 void *ptr); 1093 void br_vlan_rtnl_init(void); 1094 void br_vlan_rtnl_uninit(void); 1095 void br_vlan_notify(const struct net_bridge *br, 1096 const struct net_bridge_port *p, 1097 u16 vid, u16 vid_range, 1098 int cmd); 1099 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1100 const struct net_bridge_vlan *range_end); 1101 1102 static inline struct net_bridge_vlan_group *br_vlan_group( 1103 const struct net_bridge *br) 1104 { 1105 return rtnl_dereference(br->vlgrp); 1106 } 1107 1108 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1109 const struct net_bridge_port *p) 1110 { 1111 return rtnl_dereference(p->vlgrp); 1112 } 1113 1114 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1115 const struct net_bridge *br) 1116 { 1117 return rcu_dereference(br->vlgrp); 1118 } 1119 1120 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1121 const struct net_bridge_port *p) 1122 { 1123 return rcu_dereference(p->vlgrp); 1124 } 1125 1126 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1127 * skb, the vlan tag will always be present if the frame was tagged. 1128 */ 1129 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1130 { 1131 int err = 0; 1132 1133 if (skb_vlan_tag_present(skb)) { 1134 *vid = skb_vlan_tag_get_id(skb); 1135 } else { 1136 *vid = 0; 1137 err = -EINVAL; 1138 } 1139 1140 return err; 1141 } 1142 1143 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1144 { 1145 if (!vg) 1146 return 0; 1147 1148 smp_rmb(); 1149 return vg->pvid; 1150 } 1151 1152 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1153 { 1154 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1155 } 1156 #else 1157 static inline bool br_allowed_ingress(const struct net_bridge *br, 1158 struct net_bridge_vlan_group *vg, 1159 struct sk_buff *skb, 1160 u16 *vid, u8 *state) 1161 { 1162 return true; 1163 } 1164 1165 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1166 const struct sk_buff *skb) 1167 { 1168 return true; 1169 } 1170 1171 static inline bool br_should_learn(struct net_bridge_port *p, 1172 struct sk_buff *skb, u16 *vid) 1173 { 1174 return true; 1175 } 1176 1177 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1178 const struct net_bridge_port *port, 1179 struct net_bridge_vlan_group *vg, 1180 struct sk_buff *skb) 1181 { 1182 return skb; 1183 } 1184 1185 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1186 bool *changed, struct netlink_ext_ack *extack) 1187 { 1188 *changed = false; 1189 return -EOPNOTSUPP; 1190 } 1191 1192 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1193 { 1194 return -EOPNOTSUPP; 1195 } 1196 1197 static inline void br_vlan_flush(struct net_bridge *br) 1198 { 1199 } 1200 1201 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1202 { 1203 } 1204 1205 static inline int br_vlan_init(struct net_bridge *br) 1206 { 1207 return 0; 1208 } 1209 1210 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1211 bool *changed, struct netlink_ext_ack *extack) 1212 { 1213 *changed = false; 1214 return -EOPNOTSUPP; 1215 } 1216 1217 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1218 { 1219 return -EOPNOTSUPP; 1220 } 1221 1222 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1223 { 1224 } 1225 1226 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1227 u16 vid) 1228 { 1229 return NULL; 1230 } 1231 1232 static inline int nbp_vlan_init(struct net_bridge_port *port, 1233 struct netlink_ext_ack *extack) 1234 { 1235 return 0; 1236 } 1237 1238 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1239 { 1240 return 0; 1241 } 1242 1243 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1244 { 1245 return 0; 1246 } 1247 1248 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1249 unsigned long val) 1250 { 1251 return -EOPNOTSUPP; 1252 } 1253 1254 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1255 u32 filter_mask) 1256 { 1257 return 0; 1258 } 1259 1260 static inline struct net_bridge_vlan_group *br_vlan_group( 1261 const struct net_bridge *br) 1262 { 1263 return NULL; 1264 } 1265 1266 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1267 const struct net_bridge_port *p) 1268 { 1269 return NULL; 1270 } 1271 1272 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1273 const struct net_bridge *br) 1274 { 1275 return NULL; 1276 } 1277 1278 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1279 const struct net_bridge_port *p) 1280 { 1281 return NULL; 1282 } 1283 1284 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1285 struct br_vlan_stats *stats) 1286 { 1287 } 1288 1289 static inline void br_vlan_port_event(struct net_bridge_port *p, 1290 unsigned long event) 1291 { 1292 } 1293 1294 static inline int br_vlan_bridge_event(struct net_device *dev, 1295 unsigned long event, void *ptr) 1296 { 1297 return 0; 1298 } 1299 1300 static inline void br_vlan_rtnl_init(void) 1301 { 1302 } 1303 1304 static inline void br_vlan_rtnl_uninit(void) 1305 { 1306 } 1307 1308 static inline void br_vlan_notify(const struct net_bridge *br, 1309 const struct net_bridge_port *p, 1310 u16 vid, u16 vid_range, 1311 int cmd) 1312 { 1313 } 1314 1315 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1316 const struct net_bridge_vlan *range_end) 1317 { 1318 return true; 1319 } 1320 #endif 1321 1322 /* br_vlan_options.c */ 1323 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1324 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1325 const struct net_bridge_vlan *range_end); 1326 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1327 size_t br_vlan_opts_nl_size(void); 1328 int br_vlan_process_options(const struct net_bridge *br, 1329 const struct net_bridge_port *p, 1330 struct net_bridge_vlan *range_start, 1331 struct net_bridge_vlan *range_end, 1332 struct nlattr **tb, 1333 struct netlink_ext_ack *extack); 1334 1335 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1336 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1337 { 1338 return READ_ONCE(v->state); 1339 } 1340 1341 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1342 { 1343 WRITE_ONCE(v->state, state); 1344 } 1345 1346 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1347 { 1348 return READ_ONCE(vg->pvid_state); 1349 } 1350 1351 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1352 u8 state) 1353 { 1354 WRITE_ONCE(vg->pvid_state, state); 1355 } 1356 1357 /* learn_allow is true at ingress and false at egress */ 1358 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1359 { 1360 switch (state) { 1361 case BR_STATE_LEARNING: 1362 return learn_allow; 1363 case BR_STATE_FORWARDING: 1364 return true; 1365 default: 1366 return false; 1367 } 1368 } 1369 #endif 1370 1371 struct nf_br_ops { 1372 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1373 }; 1374 extern const struct nf_br_ops __rcu *nf_br_ops; 1375 1376 /* br_netfilter.c */ 1377 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1378 int br_nf_core_init(void); 1379 void br_nf_core_fini(void); 1380 void br_netfilter_rtable_init(struct net_bridge *); 1381 #else 1382 static inline int br_nf_core_init(void) { return 0; } 1383 static inline void br_nf_core_fini(void) {} 1384 #define br_netfilter_rtable_init(x) 1385 #endif 1386 1387 /* br_stp.c */ 1388 void br_set_state(struct net_bridge_port *p, unsigned int state); 1389 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1390 void br_init_port(struct net_bridge_port *p); 1391 void br_become_designated_port(struct net_bridge_port *p); 1392 1393 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1394 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1395 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1396 int br_set_max_age(struct net_bridge *br, unsigned long x); 1397 int __set_ageing_time(struct net_device *dev, unsigned long t); 1398 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1399 1400 1401 /* br_stp_if.c */ 1402 void br_stp_enable_bridge(struct net_bridge *br); 1403 void br_stp_disable_bridge(struct net_bridge *br); 1404 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1405 struct netlink_ext_ack *extack); 1406 void br_stp_enable_port(struct net_bridge_port *p); 1407 void br_stp_disable_port(struct net_bridge_port *p); 1408 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1409 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1410 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1411 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1412 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1413 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1414 1415 /* br_stp_bpdu.c */ 1416 struct stp_proto; 1417 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1418 struct net_device *dev); 1419 1420 /* br_stp_timer.c */ 1421 void br_stp_timer_init(struct net_bridge *br); 1422 void br_stp_port_timer_init(struct net_bridge_port *p); 1423 unsigned long br_timer_value(const struct timer_list *timer); 1424 1425 /* br.c */ 1426 #if IS_ENABLED(CONFIG_ATM_LANE) 1427 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1428 #endif 1429 1430 /* br_mrp.c */ 1431 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1432 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1433 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1434 bool br_mrp_enabled(struct net_bridge *br); 1435 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1436 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1437 #else 1438 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1439 struct nlattr *attr, int cmd, 1440 struct netlink_ext_ack *extack) 1441 { 1442 return -EOPNOTSUPP; 1443 } 1444 1445 static inline bool br_mrp_enabled(struct net_bridge *br) 1446 { 1447 return false; 1448 } 1449 1450 static inline void br_mrp_port_del(struct net_bridge *br, 1451 struct net_bridge_port *p) 1452 { 1453 } 1454 1455 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1456 { 1457 return 0; 1458 } 1459 1460 #endif 1461 1462 /* br_mrp.c */ 1463 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1464 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1465 #else 1466 static inline void br_cfm_port_del(struct net_bridge *br, 1467 struct net_bridge_port *p) 1468 { 1469 } 1470 #endif 1471 1472 /* br_netlink.c */ 1473 extern struct rtnl_link_ops br_link_ops; 1474 int br_netlink_init(void); 1475 void br_netlink_fini(void); 1476 void br_ifinfo_notify(int event, const struct net_bridge *br, 1477 const struct net_bridge_port *port); 1478 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1479 struct netlink_ext_ack *extack); 1480 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1481 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1482 u32 filter_mask, int nlflags); 1483 int br_process_vlan_info(struct net_bridge *br, 1484 struct net_bridge_port *p, int cmd, 1485 struct bridge_vlan_info *vinfo_curr, 1486 struct bridge_vlan_info **vinfo_last, 1487 bool *changed, 1488 struct netlink_ext_ack *extack); 1489 1490 #ifdef CONFIG_SYSFS 1491 /* br_sysfs_if.c */ 1492 extern const struct sysfs_ops brport_sysfs_ops; 1493 int br_sysfs_addif(struct net_bridge_port *p); 1494 int br_sysfs_renameif(struct net_bridge_port *p); 1495 1496 /* br_sysfs_br.c */ 1497 int br_sysfs_addbr(struct net_device *dev); 1498 void br_sysfs_delbr(struct net_device *dev); 1499 1500 #else 1501 1502 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1503 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1504 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1505 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1506 #endif /* CONFIG_SYSFS */ 1507 1508 /* br_switchdev.c */ 1509 #ifdef CONFIG_NET_SWITCHDEV 1510 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1511 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1512 struct sk_buff *skb); 1513 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1514 const struct sk_buff *skb); 1515 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1516 unsigned long flags, 1517 unsigned long mask); 1518 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1519 int type); 1520 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1521 struct netlink_ext_ack *extack); 1522 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1523 1524 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1525 { 1526 skb->offload_fwd_mark = 0; 1527 } 1528 #else 1529 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1530 { 1531 return 0; 1532 } 1533 1534 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1535 struct sk_buff *skb) 1536 { 1537 } 1538 1539 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1540 const struct sk_buff *skb) 1541 { 1542 return true; 1543 } 1544 1545 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1546 unsigned long flags, 1547 unsigned long mask) 1548 { 1549 return 0; 1550 } 1551 1552 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1553 u16 vid, u16 flags, 1554 struct netlink_ext_ack *extack) 1555 { 1556 return -EOPNOTSUPP; 1557 } 1558 1559 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1560 { 1561 return -EOPNOTSUPP; 1562 } 1563 1564 static inline void 1565 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1566 { 1567 } 1568 1569 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1570 { 1571 } 1572 #endif /* CONFIG_NET_SWITCHDEV */ 1573 1574 /* br_arp_nd_proxy.c */ 1575 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1576 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1577 u16 vid, struct net_bridge_port *p); 1578 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1579 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1580 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1581 #endif 1582