1 /* 2 * Linux ethernet bridge 3 * 4 * Authors: 5 * Lennert Buytenhek <buytenh@gnu.org> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #ifndef _BR_PRIVATE_H 14 #define _BR_PRIVATE_H 15 16 #include <linux/netdevice.h> 17 #include <linux/if_bridge.h> 18 #include <linux/netpoll.h> 19 #include <linux/u64_stats_sync.h> 20 #include <net/route.h> 21 #include <net/ip6_fib.h> 22 #include <linux/if_vlan.h> 23 #include <linux/rhashtable.h> 24 #include <linux/refcount.h> 25 26 #define BR_HASH_BITS 8 27 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 28 29 #define BR_HOLD_TIME (1*HZ) 30 31 #define BR_PORT_BITS 10 32 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 33 34 #define BR_VERSION "2.3" 35 36 /* Control of forwarding link local multicast */ 37 #define BR_GROUPFWD_DEFAULT 0 38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 39 enum { 40 BR_GROUPFWD_STP = BIT(0), 41 BR_GROUPFWD_MACPAUSE = BIT(1), 42 BR_GROUPFWD_LACP = BIT(2), 43 }; 44 45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 46 BR_GROUPFWD_LACP) 47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 48 #define BR_GROUPFWD_8021AD 0xB801u 49 50 /* Path to usermode spanning tree program */ 51 #define BR_STP_PROG "/sbin/bridge-stp" 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 /** 106 * struct net_bridge_vlan - per-vlan entry 107 * 108 * @vnode: rhashtable member 109 * @vid: VLAN id 110 * @flags: bridge vlan flags 111 * @stats: per-cpu VLAN statistics 112 * @br: if MASTER flag set, this points to a bridge struct 113 * @port: if MASTER flag unset, this points to a port struct 114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 116 * for this VLAN entry 117 * @vlist: sorted list of VLAN entries 118 * @rcu: used for entry destruction 119 * 120 * This structure is shared between the global per-VLAN entries contained in 121 * the bridge rhashtable and the local per-port per-VLAN entries contained in 122 * the port's rhashtable. The union entries should be interpreted depending on 123 * the entry flags that are set. 124 */ 125 struct net_bridge_vlan { 126 struct rhash_head vnode; 127 struct rhash_head tnode; 128 u16 vid; 129 u16 flags; 130 struct br_vlan_stats __percpu *stats; 131 union { 132 struct net_bridge *br; 133 struct net_bridge_port *port; 134 }; 135 union { 136 refcount_t refcnt; 137 struct net_bridge_vlan *brvlan; 138 }; 139 140 struct br_tunnel_info tinfo; 141 142 struct list_head vlist; 143 144 struct rcu_head rcu; 145 }; 146 147 /** 148 * struct net_bridge_vlan_group 149 * 150 * @vlan_hash: VLAN entry rhashtable 151 * @vlan_list: sorted VLAN entry list 152 * @num_vlans: number of total VLAN entries 153 * @pvid: PVID VLAN id 154 * 155 * IMPORTANT: Be careful when checking if there're VLAN entries using list 156 * primitives because the bridge can have entries in its list which 157 * are just for global context but not for filtering, i.e. they have 158 * the master flag set but not the brentry flag. If you have to check 159 * if there're "real" entries in the bridge please test @num_vlans 160 */ 161 struct net_bridge_vlan_group { 162 struct rhashtable vlan_hash; 163 struct rhashtable tunnel_hash; 164 struct list_head vlan_list; 165 u16 num_vlans; 166 u16 pvid; 167 }; 168 169 struct net_bridge_fdb_key { 170 mac_addr addr; 171 u16 vlan_id; 172 }; 173 174 struct net_bridge_fdb_entry { 175 struct rhash_head rhnode; 176 struct net_bridge_port *dst; 177 178 struct net_bridge_fdb_key key; 179 struct hlist_node fdb_node; 180 unsigned char is_local:1, 181 is_static:1, 182 is_sticky:1, 183 added_by_user:1, 184 added_by_external_learn:1, 185 offloaded:1; 186 187 /* write-heavy members should not affect lookups */ 188 unsigned long updated ____cacheline_aligned_in_smp; 189 unsigned long used; 190 191 struct rcu_head rcu; 192 }; 193 194 #define MDB_PG_FLAGS_PERMANENT BIT(0) 195 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 196 197 struct net_bridge_port_group { 198 struct net_bridge_port *port; 199 struct net_bridge_port_group __rcu *next; 200 struct hlist_node mglist; 201 struct rcu_head rcu; 202 struct timer_list timer; 203 struct br_ip addr; 204 unsigned char flags; 205 unsigned char eth_addr[ETH_ALEN]; 206 }; 207 208 struct net_bridge_mdb_entry { 209 struct hlist_node hlist[2]; 210 struct net_bridge *br; 211 struct net_bridge_port_group __rcu *ports; 212 struct rcu_head rcu; 213 struct timer_list timer; 214 struct br_ip addr; 215 bool host_joined; 216 }; 217 218 struct net_bridge_mdb_htable { 219 struct hlist_head *mhash; 220 struct rcu_head rcu; 221 struct net_bridge_mdb_htable *old; 222 u32 size; 223 u32 max; 224 u32 secret; 225 u32 ver; 226 }; 227 228 struct net_bridge_port { 229 struct net_bridge *br; 230 struct net_device *dev; 231 struct list_head list; 232 233 unsigned long flags; 234 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 235 struct net_bridge_vlan_group __rcu *vlgrp; 236 #endif 237 struct net_bridge_port __rcu *backup_port; 238 239 /* STP */ 240 u8 priority; 241 u8 state; 242 u16 port_no; 243 unsigned char topology_change_ack; 244 unsigned char config_pending; 245 port_id port_id; 246 port_id designated_port; 247 bridge_id designated_root; 248 bridge_id designated_bridge; 249 u32 path_cost; 250 u32 designated_cost; 251 unsigned long designated_age; 252 253 struct timer_list forward_delay_timer; 254 struct timer_list hold_timer; 255 struct timer_list message_age_timer; 256 struct kobject kobj; 257 struct rcu_head rcu; 258 259 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 260 struct bridge_mcast_own_query ip4_own_query; 261 #if IS_ENABLED(CONFIG_IPV6) 262 struct bridge_mcast_own_query ip6_own_query; 263 #endif /* IS_ENABLED(CONFIG_IPV6) */ 264 unsigned char multicast_router; 265 struct bridge_mcast_stats __percpu *mcast_stats; 266 struct timer_list multicast_router_timer; 267 struct hlist_head mglist; 268 struct hlist_node rlist; 269 #endif 270 271 #ifdef CONFIG_SYSFS 272 char sysfs_name[IFNAMSIZ]; 273 #endif 274 275 #ifdef CONFIG_NET_POLL_CONTROLLER 276 struct netpoll *np; 277 #endif 278 #ifdef CONFIG_NET_SWITCHDEV 279 int offload_fwd_mark; 280 #endif 281 u16 group_fwd_mask; 282 u16 backup_redirected_cnt; 283 }; 284 285 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 286 287 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 288 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 289 290 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 291 292 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 293 { 294 return rcu_dereference(dev->rx_handler_data); 295 } 296 297 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 298 { 299 return br_port_exists(dev) ? 300 rtnl_dereference(dev->rx_handler_data) : NULL; 301 } 302 303 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 304 { 305 return br_port_exists(dev) ? 306 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 307 } 308 309 enum net_bridge_opts { 310 BROPT_VLAN_ENABLED, 311 BROPT_VLAN_STATS_ENABLED, 312 BROPT_NF_CALL_IPTABLES, 313 BROPT_NF_CALL_IP6TABLES, 314 BROPT_NF_CALL_ARPTABLES, 315 BROPT_GROUP_ADDR_SET, 316 BROPT_MULTICAST_ENABLED, 317 BROPT_MULTICAST_QUERIER, 318 BROPT_MULTICAST_QUERY_USE_IFADDR, 319 BROPT_MULTICAST_STATS_ENABLED, 320 BROPT_HAS_IPV6_ADDR, 321 BROPT_NEIGH_SUPPRESS_ENABLED, 322 BROPT_MTU_SET_BY_USER, 323 BROPT_VLAN_STATS_PER_PORT, 324 }; 325 326 struct net_bridge { 327 spinlock_t lock; 328 spinlock_t hash_lock; 329 struct list_head port_list; 330 struct net_device *dev; 331 struct pcpu_sw_netstats __percpu *stats; 332 unsigned long options; 333 /* These fields are accessed on each packet */ 334 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 335 __be16 vlan_proto; 336 u16 default_pvid; 337 struct net_bridge_vlan_group __rcu *vlgrp; 338 #endif 339 340 struct rhashtable fdb_hash_tbl; 341 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 342 union { 343 struct rtable fake_rtable; 344 struct rt6_info fake_rt6_info; 345 }; 346 #endif 347 u16 group_fwd_mask; 348 u16 group_fwd_mask_required; 349 350 /* STP */ 351 bridge_id designated_root; 352 bridge_id bridge_id; 353 unsigned char topology_change; 354 unsigned char topology_change_detected; 355 u16 root_port; 356 unsigned long max_age; 357 unsigned long hello_time; 358 unsigned long forward_delay; 359 unsigned long ageing_time; 360 unsigned long bridge_max_age; 361 unsigned long bridge_hello_time; 362 unsigned long bridge_forward_delay; 363 unsigned long bridge_ageing_time; 364 u32 root_path_cost; 365 366 u8 group_addr[ETH_ALEN]; 367 368 enum { 369 BR_NO_STP, /* no spanning tree */ 370 BR_KERNEL_STP, /* old STP in kernel */ 371 BR_USER_STP, /* new RSTP in userspace */ 372 } stp_enabled; 373 374 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 375 376 u32 hash_elasticity; 377 u32 hash_max; 378 379 u32 multicast_last_member_count; 380 u32 multicast_startup_query_count; 381 382 u8 multicast_igmp_version; 383 u8 multicast_router; 384 #if IS_ENABLED(CONFIG_IPV6) 385 u8 multicast_mld_version; 386 #endif 387 spinlock_t multicast_lock; 388 unsigned long multicast_last_member_interval; 389 unsigned long multicast_membership_interval; 390 unsigned long multicast_querier_interval; 391 unsigned long multicast_query_interval; 392 unsigned long multicast_query_response_interval; 393 unsigned long multicast_startup_query_interval; 394 395 struct net_bridge_mdb_htable __rcu *mdb; 396 struct hlist_head router_list; 397 398 struct timer_list multicast_router_timer; 399 struct bridge_mcast_other_query ip4_other_query; 400 struct bridge_mcast_own_query ip4_own_query; 401 struct bridge_mcast_querier ip4_querier; 402 struct bridge_mcast_stats __percpu *mcast_stats; 403 #if IS_ENABLED(CONFIG_IPV6) 404 struct bridge_mcast_other_query ip6_other_query; 405 struct bridge_mcast_own_query ip6_own_query; 406 struct bridge_mcast_querier ip6_querier; 407 #endif /* IS_ENABLED(CONFIG_IPV6) */ 408 #endif 409 410 struct timer_list hello_timer; 411 struct timer_list tcn_timer; 412 struct timer_list topology_change_timer; 413 struct delayed_work gc_work; 414 struct kobject *ifobj; 415 u32 auto_cnt; 416 417 #ifdef CONFIG_NET_SWITCHDEV 418 int offload_fwd_mark; 419 #endif 420 struct hlist_head fdb_list; 421 }; 422 423 struct br_input_skb_cb { 424 struct net_device *brdev; 425 426 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 427 int igmp; 428 int mrouters_only; 429 #endif 430 431 bool proxyarp_replied; 432 bool src_port_isolated; 433 434 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 435 bool vlan_filtered; 436 #endif 437 438 #ifdef CONFIG_NET_SWITCHDEV 439 int offload_fwd_mark; 440 #endif 441 }; 442 443 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 444 445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 446 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 447 #else 448 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 449 #endif 450 451 #define br_printk(level, br, format, args...) \ 452 printk(level "%s: " format, (br)->dev->name, ##args) 453 454 #define br_err(__br, format, args...) \ 455 br_printk(KERN_ERR, __br, format, ##args) 456 #define br_warn(__br, format, args...) \ 457 br_printk(KERN_WARNING, __br, format, ##args) 458 #define br_notice(__br, format, args...) \ 459 br_printk(KERN_NOTICE, __br, format, ##args) 460 #define br_info(__br, format, args...) \ 461 br_printk(KERN_INFO, __br, format, ##args) 462 463 #define br_debug(br, format, args...) \ 464 pr_debug("%s: " format, (br)->dev->name, ##args) 465 466 /* called under bridge lock */ 467 static inline int br_is_root_bridge(const struct net_bridge *br) 468 { 469 return !memcmp(&br->bridge_id, &br->designated_root, 8); 470 } 471 472 /* check if a VLAN entry is global */ 473 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 474 { 475 return v->flags & BRIDGE_VLAN_INFO_MASTER; 476 } 477 478 /* check if a VLAN entry is used by the bridge */ 479 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 480 { 481 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 482 } 483 484 /* check if we should use the vlan entry, returns false if it's only context */ 485 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 486 { 487 if (br_vlan_is_master(v)) { 488 if (br_vlan_is_brentry(v)) 489 return true; 490 else 491 return false; 492 } 493 494 return true; 495 } 496 497 static inline int br_opt_get(const struct net_bridge *br, 498 enum net_bridge_opts opt) 499 { 500 return test_bit(opt, &br->options); 501 } 502 503 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 504 505 /* br_device.c */ 506 void br_dev_setup(struct net_device *dev); 507 void br_dev_delete(struct net_device *dev, struct list_head *list); 508 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 509 #ifdef CONFIG_NET_POLL_CONTROLLER 510 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 511 struct sk_buff *skb) 512 { 513 struct netpoll *np = p->np; 514 515 if (np) 516 netpoll_send_skb(np, skb); 517 } 518 519 int br_netpoll_enable(struct net_bridge_port *p); 520 void br_netpoll_disable(struct net_bridge_port *p); 521 #else 522 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 523 struct sk_buff *skb) 524 { 525 } 526 527 static inline int br_netpoll_enable(struct net_bridge_port *p) 528 { 529 return 0; 530 } 531 532 static inline void br_netpoll_disable(struct net_bridge_port *p) 533 { 534 } 535 #endif 536 537 /* br_fdb.c */ 538 int br_fdb_init(void); 539 void br_fdb_fini(void); 540 int br_fdb_hash_init(struct net_bridge *br); 541 void br_fdb_hash_fini(struct net_bridge *br); 542 void br_fdb_flush(struct net_bridge *br); 543 void br_fdb_find_delete_local(struct net_bridge *br, 544 const struct net_bridge_port *p, 545 const unsigned char *addr, u16 vid); 546 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 547 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 548 void br_fdb_cleanup(struct work_struct *work); 549 void br_fdb_delete_by_port(struct net_bridge *br, 550 const struct net_bridge_port *p, u16 vid, int do_all); 551 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 552 const unsigned char *addr, 553 __u16 vid); 554 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 555 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 556 unsigned long off); 557 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 558 const unsigned char *addr, u16 vid); 559 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 560 const unsigned char *addr, u16 vid, bool added_by_user); 561 562 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 563 struct net_device *dev, const unsigned char *addr, u16 vid); 564 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 565 const unsigned char *addr, u16 vid, u16 nlh_flags); 566 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 567 struct net_device *dev, struct net_device *fdev, int *idx); 568 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 569 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 570 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 571 const unsigned char *addr, u16 vid, 572 bool swdev_notify); 573 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 574 const unsigned char *addr, u16 vid, 575 bool swdev_notify); 576 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 577 const unsigned char *addr, u16 vid, bool offloaded); 578 579 /* br_forward.c */ 580 enum br_pkt_type { 581 BR_PKT_UNICAST, 582 BR_PKT_MULTICAST, 583 BR_PKT_BROADCAST 584 }; 585 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 586 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 587 bool local_rcv, bool local_orig); 588 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 589 void br_flood(struct net_bridge *br, struct sk_buff *skb, 590 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 591 592 /* return true if both source port and dest port are isolated */ 593 static inline bool br_skb_isolated(const struct net_bridge_port *to, 594 const struct sk_buff *skb) 595 { 596 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 597 (to->flags & BR_ISOLATED); 598 } 599 600 /* br_if.c */ 601 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 602 int br_add_bridge(struct net *net, const char *name); 603 int br_del_bridge(struct net *net, const char *name); 604 int br_add_if(struct net_bridge *br, struct net_device *dev, 605 struct netlink_ext_ack *extack); 606 int br_del_if(struct net_bridge *br, struct net_device *dev); 607 void br_mtu_auto_adjust(struct net_bridge *br); 608 netdev_features_t br_features_recompute(struct net_bridge *br, 609 netdev_features_t features); 610 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 611 void br_manage_promisc(struct net_bridge *br); 612 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 613 614 /* br_input.c */ 615 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 616 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 617 618 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 619 { 620 return rcu_dereference(dev->rx_handler) == br_handle_frame; 621 } 622 623 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 624 { 625 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame; 626 } 627 628 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 629 { 630 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 631 } 632 633 static inline struct net_bridge_port * 634 br_port_get_check_rtnl(const struct net_device *dev) 635 { 636 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 637 } 638 639 /* br_ioctl.c */ 640 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 641 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 642 void __user *arg); 643 644 /* br_multicast.c */ 645 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 646 extern unsigned int br_mdb_rehash_seq; 647 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 648 struct sk_buff *skb, u16 vid); 649 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 650 struct sk_buff *skb, u16 vid); 651 int br_multicast_add_port(struct net_bridge_port *port); 652 void br_multicast_del_port(struct net_bridge_port *port); 653 void br_multicast_enable_port(struct net_bridge_port *port); 654 void br_multicast_disable_port(struct net_bridge_port *port); 655 void br_multicast_init(struct net_bridge *br); 656 void br_multicast_open(struct net_bridge *br); 657 void br_multicast_stop(struct net_bridge *br); 658 void br_multicast_dev_del(struct net_bridge *br); 659 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 660 struct sk_buff *skb, bool local_rcv, bool local_orig); 661 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 662 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 663 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 664 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 665 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 666 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 667 #if IS_ENABLED(CONFIG_IPV6) 668 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 669 #endif 670 struct net_bridge_mdb_entry * 671 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 672 struct net_bridge_mdb_entry * 673 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 674 struct br_ip *group); 675 void br_multicast_free_pg(struct rcu_head *head); 676 struct net_bridge_port_group * 677 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 678 struct net_bridge_port_group __rcu *next, 679 unsigned char flags, const unsigned char *src); 680 void br_mdb_init(void); 681 void br_mdb_uninit(void); 682 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 683 struct br_ip *group, int type, u8 flags); 684 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 685 int type); 686 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 687 const struct sk_buff *skb, u8 type, u8 dir); 688 int br_multicast_init_stats(struct net_bridge *br); 689 void br_multicast_uninit_stats(struct net_bridge *br); 690 void br_multicast_get_stats(const struct net_bridge *br, 691 const struct net_bridge_port *p, 692 struct br_mcast_stats *dest); 693 694 #define mlock_dereference(X, br) \ 695 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 696 697 static inline bool br_multicast_is_router(struct net_bridge *br) 698 { 699 return br->multicast_router == 2 || 700 (br->multicast_router == 1 && 701 timer_pending(&br->multicast_router_timer)); 702 } 703 704 static inline bool 705 __br_multicast_querier_exists(struct net_bridge *br, 706 struct bridge_mcast_other_query *querier, 707 const bool is_ipv6) 708 { 709 bool own_querier_enabled; 710 711 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 712 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 713 own_querier_enabled = false; 714 else 715 own_querier_enabled = true; 716 } else { 717 own_querier_enabled = false; 718 } 719 720 return time_is_before_jiffies(querier->delay_time) && 721 (own_querier_enabled || timer_pending(&querier->timer)); 722 } 723 724 static inline bool br_multicast_querier_exists(struct net_bridge *br, 725 struct ethhdr *eth) 726 { 727 switch (eth->h_proto) { 728 case (htons(ETH_P_IP)): 729 return __br_multicast_querier_exists(br, 730 &br->ip4_other_query, false); 731 #if IS_ENABLED(CONFIG_IPV6) 732 case (htons(ETH_P_IPV6)): 733 return __br_multicast_querier_exists(br, 734 &br->ip6_other_query, true); 735 #endif 736 default: 737 return false; 738 } 739 } 740 741 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 742 { 743 return BR_INPUT_SKB_CB(skb)->igmp; 744 } 745 #else 746 static inline int br_multicast_rcv(struct net_bridge *br, 747 struct net_bridge_port *port, 748 struct sk_buff *skb, 749 u16 vid) 750 { 751 return 0; 752 } 753 754 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 755 struct sk_buff *skb, u16 vid) 756 { 757 return NULL; 758 } 759 760 static inline int br_multicast_add_port(struct net_bridge_port *port) 761 { 762 return 0; 763 } 764 765 static inline void br_multicast_del_port(struct net_bridge_port *port) 766 { 767 } 768 769 static inline void br_multicast_enable_port(struct net_bridge_port *port) 770 { 771 } 772 773 static inline void br_multicast_disable_port(struct net_bridge_port *port) 774 { 775 } 776 777 static inline void br_multicast_init(struct net_bridge *br) 778 { 779 } 780 781 static inline void br_multicast_open(struct net_bridge *br) 782 { 783 } 784 785 static inline void br_multicast_stop(struct net_bridge *br) 786 { 787 } 788 789 static inline void br_multicast_dev_del(struct net_bridge *br) 790 { 791 } 792 793 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 794 struct sk_buff *skb, 795 bool local_rcv, bool local_orig) 796 { 797 } 798 799 static inline bool br_multicast_is_router(struct net_bridge *br) 800 { 801 return false; 802 } 803 804 static inline bool br_multicast_querier_exists(struct net_bridge *br, 805 struct ethhdr *eth) 806 { 807 return false; 808 } 809 810 static inline void br_mdb_init(void) 811 { 812 } 813 814 static inline void br_mdb_uninit(void) 815 { 816 } 817 818 static inline void br_multicast_count(struct net_bridge *br, 819 const struct net_bridge_port *p, 820 const struct sk_buff *skb, 821 u8 type, u8 dir) 822 { 823 } 824 825 static inline int br_multicast_init_stats(struct net_bridge *br) 826 { 827 return 0; 828 } 829 830 static inline void br_multicast_uninit_stats(struct net_bridge *br) 831 { 832 } 833 834 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 835 { 836 return 0; 837 } 838 #endif 839 840 /* br_vlan.c */ 841 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 842 bool br_allowed_ingress(const struct net_bridge *br, 843 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 844 u16 *vid); 845 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 846 const struct sk_buff *skb); 847 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 848 struct sk_buff *br_handle_vlan(struct net_bridge *br, 849 const struct net_bridge_port *port, 850 struct net_bridge_vlan_group *vg, 851 struct sk_buff *skb); 852 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 853 bool *changed); 854 int br_vlan_delete(struct net_bridge *br, u16 vid); 855 void br_vlan_flush(struct net_bridge *br); 856 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 857 void br_recalculate_fwd_mask(struct net_bridge *br); 858 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 859 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 860 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 861 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 862 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 863 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 864 int br_vlan_init(struct net_bridge *br); 865 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 866 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 867 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 868 bool *changed); 869 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 870 void nbp_vlan_flush(struct net_bridge_port *port); 871 int nbp_vlan_init(struct net_bridge_port *port); 872 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 873 void br_vlan_get_stats(const struct net_bridge_vlan *v, 874 struct br_vlan_stats *stats); 875 876 static inline struct net_bridge_vlan_group *br_vlan_group( 877 const struct net_bridge *br) 878 { 879 return rtnl_dereference(br->vlgrp); 880 } 881 882 static inline struct net_bridge_vlan_group *nbp_vlan_group( 883 const struct net_bridge_port *p) 884 { 885 return rtnl_dereference(p->vlgrp); 886 } 887 888 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 889 const struct net_bridge *br) 890 { 891 return rcu_dereference(br->vlgrp); 892 } 893 894 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 895 const struct net_bridge_port *p) 896 { 897 return rcu_dereference(p->vlgrp); 898 } 899 900 /* Since bridge now depends on 8021Q module, but the time bridge sees the 901 * skb, the vlan tag will always be present if the frame was tagged. 902 */ 903 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 904 { 905 int err = 0; 906 907 if (skb_vlan_tag_present(skb)) { 908 *vid = skb_vlan_tag_get_id(skb); 909 } else { 910 *vid = 0; 911 err = -EINVAL; 912 } 913 914 return err; 915 } 916 917 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 918 { 919 if (!vg) 920 return 0; 921 922 smp_rmb(); 923 return vg->pvid; 924 } 925 926 #else 927 static inline bool br_allowed_ingress(const struct net_bridge *br, 928 struct net_bridge_vlan_group *vg, 929 struct sk_buff *skb, 930 u16 *vid) 931 { 932 return true; 933 } 934 935 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 936 const struct sk_buff *skb) 937 { 938 return true; 939 } 940 941 static inline bool br_should_learn(struct net_bridge_port *p, 942 struct sk_buff *skb, u16 *vid) 943 { 944 return true; 945 } 946 947 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 948 const struct net_bridge_port *port, 949 struct net_bridge_vlan_group *vg, 950 struct sk_buff *skb) 951 { 952 return skb; 953 } 954 955 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 956 bool *changed) 957 { 958 *changed = false; 959 return -EOPNOTSUPP; 960 } 961 962 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 963 { 964 return -EOPNOTSUPP; 965 } 966 967 static inline void br_vlan_flush(struct net_bridge *br) 968 { 969 } 970 971 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 972 { 973 } 974 975 static inline int br_vlan_init(struct net_bridge *br) 976 { 977 return 0; 978 } 979 980 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 981 bool *changed) 982 { 983 *changed = false; 984 return -EOPNOTSUPP; 985 } 986 987 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 988 { 989 return -EOPNOTSUPP; 990 } 991 992 static inline void nbp_vlan_flush(struct net_bridge_port *port) 993 { 994 } 995 996 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 997 u16 vid) 998 { 999 return NULL; 1000 } 1001 1002 static inline int nbp_vlan_init(struct net_bridge_port *port) 1003 { 1004 return 0; 1005 } 1006 1007 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1008 { 1009 return 0; 1010 } 1011 1012 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1013 { 1014 return 0; 1015 } 1016 1017 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1018 unsigned long val) 1019 { 1020 return -EOPNOTSUPP; 1021 } 1022 1023 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1024 u32 filter_mask) 1025 { 1026 return 0; 1027 } 1028 1029 static inline struct net_bridge_vlan_group *br_vlan_group( 1030 const struct net_bridge *br) 1031 { 1032 return NULL; 1033 } 1034 1035 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1036 const struct net_bridge_port *p) 1037 { 1038 return NULL; 1039 } 1040 1041 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1042 const struct net_bridge *br) 1043 { 1044 return NULL; 1045 } 1046 1047 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1048 const struct net_bridge_port *p) 1049 { 1050 return NULL; 1051 } 1052 1053 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1054 struct br_vlan_stats *stats) 1055 { 1056 } 1057 #endif 1058 1059 struct nf_br_ops { 1060 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1061 }; 1062 extern const struct nf_br_ops __rcu *nf_br_ops; 1063 1064 /* br_netfilter.c */ 1065 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1066 int br_nf_core_init(void); 1067 void br_nf_core_fini(void); 1068 void br_netfilter_rtable_init(struct net_bridge *); 1069 #else 1070 static inline int br_nf_core_init(void) { return 0; } 1071 static inline void br_nf_core_fini(void) {} 1072 #define br_netfilter_rtable_init(x) 1073 #endif 1074 1075 /* br_stp.c */ 1076 void br_set_state(struct net_bridge_port *p, unsigned int state); 1077 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1078 void br_init_port(struct net_bridge_port *p); 1079 void br_become_designated_port(struct net_bridge_port *p); 1080 1081 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1082 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1083 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1084 int br_set_max_age(struct net_bridge *br, unsigned long x); 1085 int __set_ageing_time(struct net_device *dev, unsigned long t); 1086 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1087 1088 1089 /* br_stp_if.c */ 1090 void br_stp_enable_bridge(struct net_bridge *br); 1091 void br_stp_disable_bridge(struct net_bridge *br); 1092 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1093 void br_stp_enable_port(struct net_bridge_port *p); 1094 void br_stp_disable_port(struct net_bridge_port *p); 1095 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1096 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1097 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1098 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1099 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1100 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1101 1102 /* br_stp_bpdu.c */ 1103 struct stp_proto; 1104 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1105 struct net_device *dev); 1106 1107 /* br_stp_timer.c */ 1108 void br_stp_timer_init(struct net_bridge *br); 1109 void br_stp_port_timer_init(struct net_bridge_port *p); 1110 unsigned long br_timer_value(const struct timer_list *timer); 1111 1112 /* br.c */ 1113 #if IS_ENABLED(CONFIG_ATM_LANE) 1114 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1115 #endif 1116 1117 /* br_netlink.c */ 1118 extern struct rtnl_link_ops br_link_ops; 1119 int br_netlink_init(void); 1120 void br_netlink_fini(void); 1121 void br_ifinfo_notify(int event, const struct net_bridge *br, 1122 const struct net_bridge_port *port); 1123 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1124 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1125 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1126 u32 filter_mask, int nlflags); 1127 1128 #ifdef CONFIG_SYSFS 1129 /* br_sysfs_if.c */ 1130 extern const struct sysfs_ops brport_sysfs_ops; 1131 int br_sysfs_addif(struct net_bridge_port *p); 1132 int br_sysfs_renameif(struct net_bridge_port *p); 1133 1134 /* br_sysfs_br.c */ 1135 int br_sysfs_addbr(struct net_device *dev); 1136 void br_sysfs_delbr(struct net_device *dev); 1137 1138 #else 1139 1140 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1141 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1142 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1143 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1144 #endif /* CONFIG_SYSFS */ 1145 1146 /* br_switchdev.c */ 1147 #ifdef CONFIG_NET_SWITCHDEV 1148 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1149 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1150 struct sk_buff *skb); 1151 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1152 const struct sk_buff *skb); 1153 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1154 unsigned long flags, 1155 unsigned long mask); 1156 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1157 int type); 1158 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags); 1159 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1160 1161 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1162 { 1163 skb->offload_fwd_mark = 0; 1164 } 1165 #else 1166 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1167 { 1168 return 0; 1169 } 1170 1171 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1172 struct sk_buff *skb) 1173 { 1174 } 1175 1176 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1177 const struct sk_buff *skb) 1178 { 1179 return true; 1180 } 1181 1182 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1183 unsigned long flags, 1184 unsigned long mask) 1185 { 1186 return 0; 1187 } 1188 1189 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1190 u16 vid, u16 flags) 1191 { 1192 return -EOPNOTSUPP; 1193 } 1194 1195 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1196 { 1197 return -EOPNOTSUPP; 1198 } 1199 1200 static inline void 1201 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1202 { 1203 } 1204 1205 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1206 { 1207 } 1208 #endif /* CONFIG_NET_SWITCHDEV */ 1209 1210 /* br_arp_nd_proxy.c */ 1211 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1212 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1213 u16 vid, struct net_bridge_port *p); 1214 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1215 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1216 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1217 #endif 1218