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 { 59 unsigned char prio[2]; 60 unsigned char addr[ETH_ALEN]; 61 }; 62 63 struct mac_addr 64 { 65 unsigned char addr[ETH_ALEN]; 66 }; 67 68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 69 /* our own querier */ 70 struct bridge_mcast_own_query { 71 struct timer_list timer; 72 u32 startup_sent; 73 }; 74 75 /* other querier */ 76 struct bridge_mcast_other_query { 77 struct timer_list timer; 78 unsigned long delay_time; 79 }; 80 81 /* selected querier */ 82 struct bridge_mcast_querier { 83 struct br_ip addr; 84 struct net_bridge_port __rcu *port; 85 }; 86 87 /* IGMP/MLD statistics */ 88 struct bridge_mcast_stats { 89 struct br_mcast_stats mstats; 90 struct u64_stats_sync syncp; 91 }; 92 #endif 93 94 struct br_vlan_stats { 95 u64 rx_bytes; 96 u64 rx_packets; 97 u64 tx_bytes; 98 u64 tx_packets; 99 struct u64_stats_sync syncp; 100 }; 101 102 struct br_tunnel_info { 103 __be64 tunnel_id; 104 struct metadata_dst *tunnel_dst; 105 }; 106 107 /** 108 * struct net_bridge_vlan - per-vlan entry 109 * 110 * @vnode: rhashtable member 111 * @vid: VLAN id 112 * @flags: bridge vlan flags 113 * @stats: per-cpu VLAN statistics 114 * @br: if MASTER flag set, this points to a bridge struct 115 * @port: if MASTER flag unset, this points to a port struct 116 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 117 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 118 * for this VLAN entry 119 * @vlist: sorted list of VLAN entries 120 * @rcu: used for entry destruction 121 * 122 * This structure is shared between the global per-VLAN entries contained in 123 * the bridge rhashtable and the local per-port per-VLAN entries contained in 124 * the port's rhashtable. The union entries should be interpreted depending on 125 * the entry flags that are set. 126 */ 127 struct net_bridge_vlan { 128 struct rhash_head vnode; 129 struct rhash_head tnode; 130 u16 vid; 131 u16 flags; 132 struct br_vlan_stats __percpu *stats; 133 union { 134 struct net_bridge *br; 135 struct net_bridge_port *port; 136 }; 137 union { 138 refcount_t refcnt; 139 struct net_bridge_vlan *brvlan; 140 }; 141 142 struct br_tunnel_info tinfo; 143 144 struct list_head vlist; 145 146 struct rcu_head rcu; 147 }; 148 149 /** 150 * struct net_bridge_vlan_group 151 * 152 * @vlan_hash: VLAN entry rhashtable 153 * @vlan_list: sorted VLAN entry list 154 * @num_vlans: number of total VLAN entries 155 * @pvid: PVID VLAN id 156 * 157 * IMPORTANT: Be careful when checking if there're VLAN entries using list 158 * primitives because the bridge can have entries in its list which 159 * are just for global context but not for filtering, i.e. they have 160 * the master flag set but not the brentry flag. If you have to check 161 * if there're "real" entries in the bridge please test @num_vlans 162 */ 163 struct net_bridge_vlan_group { 164 struct rhashtable vlan_hash; 165 struct rhashtable tunnel_hash; 166 struct list_head vlan_list; 167 u16 num_vlans; 168 u16 pvid; 169 }; 170 171 struct net_bridge_fdb_key { 172 mac_addr addr; 173 u16 vlan_id; 174 }; 175 176 struct net_bridge_fdb_entry { 177 struct rhash_head rhnode; 178 struct net_bridge_port *dst; 179 180 struct net_bridge_fdb_key key; 181 struct hlist_node fdb_node; 182 unsigned char is_local:1, 183 is_static:1, 184 added_by_user:1, 185 added_by_external_learn:1, 186 offloaded:1; 187 188 /* write-heavy members should not affect lookups */ 189 unsigned long updated ____cacheline_aligned_in_smp; 190 unsigned long used; 191 192 struct rcu_head rcu; 193 }; 194 195 #define MDB_PG_FLAGS_PERMANENT BIT(0) 196 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 197 198 struct net_bridge_port_group { 199 struct net_bridge_port *port; 200 struct net_bridge_port_group __rcu *next; 201 struct hlist_node mglist; 202 struct rcu_head rcu; 203 struct timer_list timer; 204 struct br_ip addr; 205 unsigned char flags; 206 unsigned char eth_addr[ETH_ALEN]; 207 }; 208 209 struct net_bridge_mdb_entry 210 { 211 struct hlist_node hlist[2]; 212 struct net_bridge *br; 213 struct net_bridge_port_group __rcu *ports; 214 struct rcu_head rcu; 215 struct timer_list timer; 216 struct br_ip addr; 217 bool host_joined; 218 }; 219 220 struct net_bridge_mdb_htable 221 { 222 struct hlist_head *mhash; 223 struct rcu_head rcu; 224 struct net_bridge_mdb_htable *old; 225 u32 size; 226 u32 max; 227 u32 secret; 228 u32 ver; 229 }; 230 231 struct net_bridge_port { 232 struct net_bridge *br; 233 struct net_device *dev; 234 struct list_head list; 235 236 unsigned long flags; 237 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 238 struct net_bridge_vlan_group __rcu *vlgrp; 239 #endif 240 241 /* STP */ 242 u8 priority; 243 u8 state; 244 u16 port_no; 245 unsigned char topology_change_ack; 246 unsigned char config_pending; 247 port_id port_id; 248 port_id designated_port; 249 bridge_id designated_root; 250 bridge_id designated_bridge; 251 u32 path_cost; 252 u32 designated_cost; 253 unsigned long designated_age; 254 255 struct timer_list forward_delay_timer; 256 struct timer_list hold_timer; 257 struct timer_list message_age_timer; 258 struct kobject kobj; 259 struct rcu_head rcu; 260 261 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 262 struct bridge_mcast_own_query ip4_own_query; 263 #if IS_ENABLED(CONFIG_IPV6) 264 struct bridge_mcast_own_query ip6_own_query; 265 #endif /* IS_ENABLED(CONFIG_IPV6) */ 266 unsigned char multicast_router; 267 struct bridge_mcast_stats __percpu *mcast_stats; 268 struct timer_list multicast_router_timer; 269 struct hlist_head mglist; 270 struct hlist_node rlist; 271 #endif 272 273 #ifdef CONFIG_SYSFS 274 char sysfs_name[IFNAMSIZ]; 275 #endif 276 277 #ifdef CONFIG_NET_POLL_CONTROLLER 278 struct netpoll *np; 279 #endif 280 #ifdef CONFIG_NET_SWITCHDEV 281 int offload_fwd_mark; 282 #endif 283 u16 group_fwd_mask; 284 }; 285 286 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 287 288 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 289 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 290 291 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 292 293 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 294 { 295 return rcu_dereference(dev->rx_handler_data); 296 } 297 298 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 299 { 300 return br_port_exists(dev) ? 301 rtnl_dereference(dev->rx_handler_data) : NULL; 302 } 303 304 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 305 { 306 return br_port_exists(dev) ? 307 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 308 } 309 310 struct net_bridge { 311 spinlock_t lock; 312 spinlock_t hash_lock; 313 struct list_head port_list; 314 struct net_device *dev; 315 struct pcpu_sw_netstats __percpu *stats; 316 /* These fields are accessed on each packet */ 317 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 318 u8 vlan_enabled; 319 u8 vlan_stats_enabled; 320 __be16 vlan_proto; 321 u16 default_pvid; 322 struct net_bridge_vlan_group __rcu *vlgrp; 323 #endif 324 325 struct rhashtable fdb_hash_tbl; 326 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 327 union { 328 struct rtable fake_rtable; 329 struct rt6_info fake_rt6_info; 330 }; 331 bool nf_call_iptables; 332 bool nf_call_ip6tables; 333 bool nf_call_arptables; 334 #endif 335 u16 group_fwd_mask; 336 u16 group_fwd_mask_required; 337 338 /* STP */ 339 bridge_id designated_root; 340 bridge_id bridge_id; 341 u32 root_path_cost; 342 unsigned char topology_change; 343 unsigned char topology_change_detected; 344 u16 root_port; 345 unsigned long max_age; 346 unsigned long hello_time; 347 unsigned long forward_delay; 348 unsigned long ageing_time; 349 unsigned long bridge_max_age; 350 unsigned long bridge_hello_time; 351 unsigned long bridge_forward_delay; 352 unsigned long bridge_ageing_time; 353 354 u8 group_addr[ETH_ALEN]; 355 bool group_addr_set; 356 357 enum { 358 BR_NO_STP, /* no spanning tree */ 359 BR_KERNEL_STP, /* old STP in kernel */ 360 BR_USER_STP, /* new RSTP in userspace */ 361 } stp_enabled; 362 363 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 364 unsigned char multicast_router; 365 366 u8 multicast_disabled:1; 367 u8 multicast_querier:1; 368 u8 multicast_query_use_ifaddr:1; 369 u8 has_ipv6_addr:1; 370 u8 multicast_stats_enabled:1; 371 372 u32 hash_elasticity; 373 u32 hash_max; 374 375 u32 multicast_last_member_count; 376 u32 multicast_startup_query_count; 377 378 u8 multicast_igmp_version; 379 380 unsigned long multicast_last_member_interval; 381 unsigned long multicast_membership_interval; 382 unsigned long multicast_querier_interval; 383 unsigned long multicast_query_interval; 384 unsigned long multicast_query_response_interval; 385 unsigned long multicast_startup_query_interval; 386 387 spinlock_t multicast_lock; 388 struct net_bridge_mdb_htable __rcu *mdb; 389 struct hlist_head router_list; 390 391 struct timer_list multicast_router_timer; 392 struct bridge_mcast_other_query ip4_other_query; 393 struct bridge_mcast_own_query ip4_own_query; 394 struct bridge_mcast_querier ip4_querier; 395 struct bridge_mcast_stats __percpu *mcast_stats; 396 #if IS_ENABLED(CONFIG_IPV6) 397 struct bridge_mcast_other_query ip6_other_query; 398 struct bridge_mcast_own_query ip6_own_query; 399 struct bridge_mcast_querier ip6_querier; 400 u8 multicast_mld_version; 401 #endif /* IS_ENABLED(CONFIG_IPV6) */ 402 #endif 403 404 struct timer_list hello_timer; 405 struct timer_list tcn_timer; 406 struct timer_list topology_change_timer; 407 struct delayed_work gc_work; 408 struct kobject *ifobj; 409 u32 auto_cnt; 410 411 #ifdef CONFIG_NET_SWITCHDEV 412 int offload_fwd_mark; 413 #endif 414 bool neigh_suppress_enabled; 415 bool mtu_set_by_user; 416 struct hlist_head fdb_list; 417 }; 418 419 struct br_input_skb_cb { 420 struct net_device *brdev; 421 422 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 423 int igmp; 424 int mrouters_only; 425 #endif 426 427 bool proxyarp_replied; 428 bool src_port_isolated; 429 430 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 431 bool vlan_filtered; 432 #endif 433 434 #ifdef CONFIG_NET_SWITCHDEV 435 int offload_fwd_mark; 436 #endif 437 }; 438 439 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 440 441 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 442 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 443 #else 444 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 445 #endif 446 447 #define br_printk(level, br, format, args...) \ 448 printk(level "%s: " format, (br)->dev->name, ##args) 449 450 #define br_err(__br, format, args...) \ 451 br_printk(KERN_ERR, __br, format, ##args) 452 #define br_warn(__br, format, args...) \ 453 br_printk(KERN_WARNING, __br, format, ##args) 454 #define br_notice(__br, format, args...) \ 455 br_printk(KERN_NOTICE, __br, format, ##args) 456 #define br_info(__br, format, args...) \ 457 br_printk(KERN_INFO, __br, format, ##args) 458 459 #define br_debug(br, format, args...) \ 460 pr_debug("%s: " format, (br)->dev->name, ##args) 461 462 /* called under bridge lock */ 463 static inline int br_is_root_bridge(const struct net_bridge *br) 464 { 465 return !memcmp(&br->bridge_id, &br->designated_root, 8); 466 } 467 468 /* check if a VLAN entry is global */ 469 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 470 { 471 return v->flags & BRIDGE_VLAN_INFO_MASTER; 472 } 473 474 /* check if a VLAN entry is used by the bridge */ 475 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 476 { 477 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 478 } 479 480 /* check if we should use the vlan entry, returns false if it's only context */ 481 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 482 { 483 if (br_vlan_is_master(v)) { 484 if (br_vlan_is_brentry(v)) 485 return true; 486 else 487 return false; 488 } 489 490 return true; 491 } 492 493 /* br_device.c */ 494 void br_dev_setup(struct net_device *dev); 495 void br_dev_delete(struct net_device *dev, struct list_head *list); 496 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 497 #ifdef CONFIG_NET_POLL_CONTROLLER 498 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 499 struct sk_buff *skb) 500 { 501 struct netpoll *np = p->np; 502 503 if (np) 504 netpoll_send_skb(np, skb); 505 } 506 507 int br_netpoll_enable(struct net_bridge_port *p); 508 void br_netpoll_disable(struct net_bridge_port *p); 509 #else 510 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 511 struct sk_buff *skb) 512 { 513 } 514 515 static inline int br_netpoll_enable(struct net_bridge_port *p) 516 { 517 return 0; 518 } 519 520 static inline void br_netpoll_disable(struct net_bridge_port *p) 521 { 522 } 523 #endif 524 525 /* br_fdb.c */ 526 int br_fdb_init(void); 527 void br_fdb_fini(void); 528 int br_fdb_hash_init(struct net_bridge *br); 529 void br_fdb_hash_fini(struct net_bridge *br); 530 void br_fdb_flush(struct net_bridge *br); 531 void br_fdb_find_delete_local(struct net_bridge *br, 532 const struct net_bridge_port *p, 533 const unsigned char *addr, u16 vid); 534 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 535 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 536 void br_fdb_cleanup(struct work_struct *work); 537 void br_fdb_delete_by_port(struct net_bridge *br, 538 const struct net_bridge_port *p, u16 vid, int do_all); 539 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 540 const unsigned char *addr, 541 __u16 vid); 542 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 543 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 544 unsigned long off); 545 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 546 const unsigned char *addr, u16 vid); 547 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 548 const unsigned char *addr, u16 vid, bool added_by_user); 549 550 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 551 struct net_device *dev, const unsigned char *addr, u16 vid); 552 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 553 const unsigned char *addr, u16 vid, u16 nlh_flags); 554 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 555 struct net_device *dev, struct net_device *fdev, int *idx); 556 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 557 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 558 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 559 const unsigned char *addr, u16 vid, 560 bool swdev_notify); 561 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 562 const unsigned char *addr, u16 vid, 563 bool swdev_notify); 564 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 565 const unsigned char *addr, u16 vid); 566 567 /* br_forward.c */ 568 enum br_pkt_type { 569 BR_PKT_UNICAST, 570 BR_PKT_MULTICAST, 571 BR_PKT_BROADCAST 572 }; 573 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 574 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 575 bool local_rcv, bool local_orig); 576 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 577 void br_flood(struct net_bridge *br, struct sk_buff *skb, 578 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 579 580 /* return true if both source port and dest port are isolated */ 581 static inline bool br_skb_isolated(const struct net_bridge_port *to, 582 const struct sk_buff *skb) 583 { 584 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 585 (to->flags & BR_ISOLATED); 586 } 587 588 /* br_if.c */ 589 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 590 int br_add_bridge(struct net *net, const char *name); 591 int br_del_bridge(struct net *net, const char *name); 592 int br_add_if(struct net_bridge *br, struct net_device *dev, 593 struct netlink_ext_ack *extack); 594 int br_del_if(struct net_bridge *br, struct net_device *dev); 595 void br_mtu_auto_adjust(struct net_bridge *br); 596 netdev_features_t br_features_recompute(struct net_bridge *br, 597 netdev_features_t features); 598 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 599 void br_manage_promisc(struct net_bridge *br); 600 601 /* br_input.c */ 602 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 603 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 604 605 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 606 { 607 return rcu_dereference(dev->rx_handler) == br_handle_frame; 608 } 609 610 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 611 { 612 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame; 613 } 614 615 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 616 { 617 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 618 } 619 620 static inline struct net_bridge_port * 621 br_port_get_check_rtnl(const struct net_device *dev) 622 { 623 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 624 } 625 626 /* br_ioctl.c */ 627 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 628 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 629 void __user *arg); 630 631 /* br_multicast.c */ 632 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 633 extern unsigned int br_mdb_rehash_seq; 634 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 635 struct sk_buff *skb, u16 vid); 636 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 637 struct sk_buff *skb, u16 vid); 638 int br_multicast_add_port(struct net_bridge_port *port); 639 void br_multicast_del_port(struct net_bridge_port *port); 640 void br_multicast_enable_port(struct net_bridge_port *port); 641 void br_multicast_disable_port(struct net_bridge_port *port); 642 void br_multicast_init(struct net_bridge *br); 643 void br_multicast_open(struct net_bridge *br); 644 void br_multicast_stop(struct net_bridge *br); 645 void br_multicast_dev_del(struct net_bridge *br); 646 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 647 struct sk_buff *skb, bool local_rcv, bool local_orig); 648 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 649 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 650 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 651 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 652 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 653 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 654 #if IS_ENABLED(CONFIG_IPV6) 655 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 656 #endif 657 struct net_bridge_mdb_entry * 658 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 659 struct net_bridge_mdb_entry * 660 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 661 struct br_ip *group); 662 void br_multicast_free_pg(struct rcu_head *head); 663 struct net_bridge_port_group * 664 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 665 struct net_bridge_port_group __rcu *next, 666 unsigned char flags, const unsigned char *src); 667 void br_mdb_init(void); 668 void br_mdb_uninit(void); 669 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 670 struct br_ip *group, int type, u8 flags); 671 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 672 int type); 673 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 674 const struct sk_buff *skb, u8 type, u8 dir); 675 int br_multicast_init_stats(struct net_bridge *br); 676 void br_multicast_uninit_stats(struct net_bridge *br); 677 void br_multicast_get_stats(const struct net_bridge *br, 678 const struct net_bridge_port *p, 679 struct br_mcast_stats *dest); 680 681 #define mlock_dereference(X, br) \ 682 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 683 684 static inline bool br_multicast_is_router(struct net_bridge *br) 685 { 686 return br->multicast_router == 2 || 687 (br->multicast_router == 1 && 688 timer_pending(&br->multicast_router_timer)); 689 } 690 691 static inline bool 692 __br_multicast_querier_exists(struct net_bridge *br, 693 struct bridge_mcast_other_query *querier, 694 const bool is_ipv6) 695 { 696 bool own_querier_enabled; 697 698 if (br->multicast_querier) { 699 if (is_ipv6 && !br->has_ipv6_addr) 700 own_querier_enabled = false; 701 else 702 own_querier_enabled = true; 703 } else { 704 own_querier_enabled = false; 705 } 706 707 return time_is_before_jiffies(querier->delay_time) && 708 (own_querier_enabled || timer_pending(&querier->timer)); 709 } 710 711 static inline bool br_multicast_querier_exists(struct net_bridge *br, 712 struct ethhdr *eth) 713 { 714 switch (eth->h_proto) { 715 case (htons(ETH_P_IP)): 716 return __br_multicast_querier_exists(br, 717 &br->ip4_other_query, false); 718 #if IS_ENABLED(CONFIG_IPV6) 719 case (htons(ETH_P_IPV6)): 720 return __br_multicast_querier_exists(br, 721 &br->ip6_other_query, true); 722 #endif 723 default: 724 return false; 725 } 726 } 727 728 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 729 { 730 return BR_INPUT_SKB_CB(skb)->igmp; 731 } 732 #else 733 static inline int br_multicast_rcv(struct net_bridge *br, 734 struct net_bridge_port *port, 735 struct sk_buff *skb, 736 u16 vid) 737 { 738 return 0; 739 } 740 741 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 742 struct sk_buff *skb, u16 vid) 743 { 744 return NULL; 745 } 746 747 static inline int br_multicast_add_port(struct net_bridge_port *port) 748 { 749 return 0; 750 } 751 752 static inline void br_multicast_del_port(struct net_bridge_port *port) 753 { 754 } 755 756 static inline void br_multicast_enable_port(struct net_bridge_port *port) 757 { 758 } 759 760 static inline void br_multicast_disable_port(struct net_bridge_port *port) 761 { 762 } 763 764 static inline void br_multicast_init(struct net_bridge *br) 765 { 766 } 767 768 static inline void br_multicast_open(struct net_bridge *br) 769 { 770 } 771 772 static inline void br_multicast_stop(struct net_bridge *br) 773 { 774 } 775 776 static inline void br_multicast_dev_del(struct net_bridge *br) 777 { 778 } 779 780 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 781 struct sk_buff *skb, 782 bool local_rcv, bool local_orig) 783 { 784 } 785 786 static inline bool br_multicast_is_router(struct net_bridge *br) 787 { 788 return false; 789 } 790 791 static inline bool br_multicast_querier_exists(struct net_bridge *br, 792 struct ethhdr *eth) 793 { 794 return false; 795 } 796 797 static inline void br_mdb_init(void) 798 { 799 } 800 801 static inline void br_mdb_uninit(void) 802 { 803 } 804 805 static inline void br_multicast_count(struct net_bridge *br, 806 const struct net_bridge_port *p, 807 const struct sk_buff *skb, 808 u8 type, u8 dir) 809 { 810 } 811 812 static inline int br_multicast_init_stats(struct net_bridge *br) 813 { 814 return 0; 815 } 816 817 static inline void br_multicast_uninit_stats(struct net_bridge *br) 818 { 819 } 820 821 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 822 { 823 return 0; 824 } 825 #endif 826 827 /* br_vlan.c */ 828 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 829 bool br_allowed_ingress(const struct net_bridge *br, 830 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 831 u16 *vid); 832 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 833 const struct sk_buff *skb); 834 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 835 struct sk_buff *br_handle_vlan(struct net_bridge *br, 836 const struct net_bridge_port *port, 837 struct net_bridge_vlan_group *vg, 838 struct sk_buff *skb); 839 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 840 bool *changed); 841 int br_vlan_delete(struct net_bridge *br, u16 vid); 842 void br_vlan_flush(struct net_bridge *br); 843 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 844 void br_recalculate_fwd_mask(struct net_bridge *br); 845 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 846 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 847 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 848 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 849 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 850 int br_vlan_init(struct net_bridge *br); 851 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 852 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 853 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 854 bool *changed); 855 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 856 void nbp_vlan_flush(struct net_bridge_port *port); 857 int nbp_vlan_init(struct net_bridge_port *port); 858 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 859 void br_vlan_get_stats(const struct net_bridge_vlan *v, 860 struct br_vlan_stats *stats); 861 862 static inline struct net_bridge_vlan_group *br_vlan_group( 863 const struct net_bridge *br) 864 { 865 return rtnl_dereference(br->vlgrp); 866 } 867 868 static inline struct net_bridge_vlan_group *nbp_vlan_group( 869 const struct net_bridge_port *p) 870 { 871 return rtnl_dereference(p->vlgrp); 872 } 873 874 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 875 const struct net_bridge *br) 876 { 877 return rcu_dereference(br->vlgrp); 878 } 879 880 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 881 const struct net_bridge_port *p) 882 { 883 return rcu_dereference(p->vlgrp); 884 } 885 886 /* Since bridge now depends on 8021Q module, but the time bridge sees the 887 * skb, the vlan tag will always be present if the frame was tagged. 888 */ 889 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 890 { 891 int err = 0; 892 893 if (skb_vlan_tag_present(skb)) { 894 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 895 } else { 896 *vid = 0; 897 err = -EINVAL; 898 } 899 900 return err; 901 } 902 903 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 904 { 905 if (!vg) 906 return 0; 907 908 smp_rmb(); 909 return vg->pvid; 910 } 911 912 #else 913 static inline bool br_allowed_ingress(const struct net_bridge *br, 914 struct net_bridge_vlan_group *vg, 915 struct sk_buff *skb, 916 u16 *vid) 917 { 918 return true; 919 } 920 921 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 922 const struct sk_buff *skb) 923 { 924 return true; 925 } 926 927 static inline bool br_should_learn(struct net_bridge_port *p, 928 struct sk_buff *skb, u16 *vid) 929 { 930 return true; 931 } 932 933 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 934 const struct net_bridge_port *port, 935 struct net_bridge_vlan_group *vg, 936 struct sk_buff *skb) 937 { 938 return skb; 939 } 940 941 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 942 bool *changed) 943 { 944 *changed = false; 945 return -EOPNOTSUPP; 946 } 947 948 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 949 { 950 return -EOPNOTSUPP; 951 } 952 953 static inline void br_vlan_flush(struct net_bridge *br) 954 { 955 } 956 957 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 958 { 959 } 960 961 static inline int br_vlan_init(struct net_bridge *br) 962 { 963 return 0; 964 } 965 966 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 967 bool *changed) 968 { 969 *changed = false; 970 return -EOPNOTSUPP; 971 } 972 973 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 974 { 975 return -EOPNOTSUPP; 976 } 977 978 static inline void nbp_vlan_flush(struct net_bridge_port *port) 979 { 980 } 981 982 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 983 u16 vid) 984 { 985 return NULL; 986 } 987 988 static inline int nbp_vlan_init(struct net_bridge_port *port) 989 { 990 return 0; 991 } 992 993 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 994 { 995 return 0; 996 } 997 998 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 999 { 1000 return 0; 1001 } 1002 1003 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1004 unsigned long val) 1005 { 1006 return -EOPNOTSUPP; 1007 } 1008 1009 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1010 u32 filter_mask) 1011 { 1012 return 0; 1013 } 1014 1015 static inline struct net_bridge_vlan_group *br_vlan_group( 1016 const struct net_bridge *br) 1017 { 1018 return NULL; 1019 } 1020 1021 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1022 const struct net_bridge_port *p) 1023 { 1024 return NULL; 1025 } 1026 1027 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1028 const struct net_bridge *br) 1029 { 1030 return NULL; 1031 } 1032 1033 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1034 const struct net_bridge_port *p) 1035 { 1036 return NULL; 1037 } 1038 1039 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1040 struct br_vlan_stats *stats) 1041 { 1042 } 1043 #endif 1044 1045 struct nf_br_ops { 1046 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1047 }; 1048 extern const struct nf_br_ops __rcu *nf_br_ops; 1049 1050 /* br_netfilter.c */ 1051 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1052 int br_nf_core_init(void); 1053 void br_nf_core_fini(void); 1054 void br_netfilter_rtable_init(struct net_bridge *); 1055 #else 1056 static inline int br_nf_core_init(void) { return 0; } 1057 static inline void br_nf_core_fini(void) {} 1058 #define br_netfilter_rtable_init(x) 1059 #endif 1060 1061 /* br_stp.c */ 1062 void br_set_state(struct net_bridge_port *p, unsigned int state); 1063 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1064 void br_init_port(struct net_bridge_port *p); 1065 void br_become_designated_port(struct net_bridge_port *p); 1066 1067 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1068 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1069 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1070 int br_set_max_age(struct net_bridge *br, unsigned long x); 1071 int __set_ageing_time(struct net_device *dev, unsigned long t); 1072 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1073 1074 1075 /* br_stp_if.c */ 1076 void br_stp_enable_bridge(struct net_bridge *br); 1077 void br_stp_disable_bridge(struct net_bridge *br); 1078 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1079 void br_stp_enable_port(struct net_bridge_port *p); 1080 void br_stp_disable_port(struct net_bridge_port *p); 1081 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1082 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1083 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1084 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1085 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1086 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1087 1088 /* br_stp_bpdu.c */ 1089 struct stp_proto; 1090 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1091 struct net_device *dev); 1092 1093 /* br_stp_timer.c */ 1094 void br_stp_timer_init(struct net_bridge *br); 1095 void br_stp_port_timer_init(struct net_bridge_port *p); 1096 unsigned long br_timer_value(const struct timer_list *timer); 1097 1098 /* br.c */ 1099 #if IS_ENABLED(CONFIG_ATM_LANE) 1100 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1101 #endif 1102 1103 /* br_netlink.c */ 1104 extern struct rtnl_link_ops br_link_ops; 1105 int br_netlink_init(void); 1106 void br_netlink_fini(void); 1107 void br_ifinfo_notify(int event, const struct net_bridge *br, 1108 const struct net_bridge_port *port); 1109 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1110 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1111 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1112 u32 filter_mask, int nlflags); 1113 1114 #ifdef CONFIG_SYSFS 1115 /* br_sysfs_if.c */ 1116 extern const struct sysfs_ops brport_sysfs_ops; 1117 int br_sysfs_addif(struct net_bridge_port *p); 1118 int br_sysfs_renameif(struct net_bridge_port *p); 1119 1120 /* br_sysfs_br.c */ 1121 int br_sysfs_addbr(struct net_device *dev); 1122 void br_sysfs_delbr(struct net_device *dev); 1123 1124 #else 1125 1126 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1127 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1128 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1129 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1130 #endif /* CONFIG_SYSFS */ 1131 1132 /* br_switchdev.c */ 1133 #ifdef CONFIG_NET_SWITCHDEV 1134 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1135 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1136 struct sk_buff *skb); 1137 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1138 const struct sk_buff *skb); 1139 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1140 unsigned long flags, 1141 unsigned long mask); 1142 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1143 int type); 1144 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags); 1145 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1146 1147 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1148 { 1149 skb->offload_fwd_mark = 0; 1150 } 1151 #else 1152 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1153 { 1154 return 0; 1155 } 1156 1157 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1158 struct sk_buff *skb) 1159 { 1160 } 1161 1162 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1163 const struct sk_buff *skb) 1164 { 1165 return true; 1166 } 1167 1168 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1169 unsigned long flags, 1170 unsigned long mask) 1171 { 1172 return 0; 1173 } 1174 1175 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1176 u16 vid, u16 flags) 1177 { 1178 return -EOPNOTSUPP; 1179 } 1180 1181 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1182 { 1183 return -EOPNOTSUPP; 1184 } 1185 1186 static inline void 1187 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1188 { 1189 } 1190 1191 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1192 { 1193 } 1194 #endif /* CONFIG_NET_SWITCHDEV */ 1195 1196 /* br_arp_nd_proxy.c */ 1197 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1198 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1199 u16 vid, struct net_bridge_port *p); 1200 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1201 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1202 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1203 #endif 1204