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 struct net_bridge_port __rcu *backup_port; 241 242 /* STP */ 243 u8 priority; 244 u8 state; 245 u16 port_no; 246 unsigned char topology_change_ack; 247 unsigned char config_pending; 248 port_id port_id; 249 port_id designated_port; 250 bridge_id designated_root; 251 bridge_id designated_bridge; 252 u32 path_cost; 253 u32 designated_cost; 254 unsigned long designated_age; 255 256 struct timer_list forward_delay_timer; 257 struct timer_list hold_timer; 258 struct timer_list message_age_timer; 259 struct kobject kobj; 260 struct rcu_head rcu; 261 262 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 263 struct bridge_mcast_own_query ip4_own_query; 264 #if IS_ENABLED(CONFIG_IPV6) 265 struct bridge_mcast_own_query ip6_own_query; 266 #endif /* IS_ENABLED(CONFIG_IPV6) */ 267 unsigned char multicast_router; 268 struct bridge_mcast_stats __percpu *mcast_stats; 269 struct timer_list multicast_router_timer; 270 struct hlist_head mglist; 271 struct hlist_node rlist; 272 #endif 273 274 #ifdef CONFIG_SYSFS 275 char sysfs_name[IFNAMSIZ]; 276 #endif 277 278 #ifdef CONFIG_NET_POLL_CONTROLLER 279 struct netpoll *np; 280 #endif 281 #ifdef CONFIG_NET_SWITCHDEV 282 int offload_fwd_mark; 283 #endif 284 u16 group_fwd_mask; 285 u16 backup_redirected_cnt; 286 }; 287 288 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 289 290 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 291 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 292 293 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT) 294 295 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 296 { 297 return rcu_dereference(dev->rx_handler_data); 298 } 299 300 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 301 { 302 return br_port_exists(dev) ? 303 rtnl_dereference(dev->rx_handler_data) : NULL; 304 } 305 306 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 307 { 308 return br_port_exists(dev) ? 309 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 310 } 311 312 struct net_bridge { 313 spinlock_t lock; 314 spinlock_t hash_lock; 315 struct list_head port_list; 316 struct net_device *dev; 317 struct pcpu_sw_netstats __percpu *stats; 318 /* These fields are accessed on each packet */ 319 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 320 u8 vlan_enabled; 321 u8 vlan_stats_enabled; 322 __be16 vlan_proto; 323 u16 default_pvid; 324 struct net_bridge_vlan_group __rcu *vlgrp; 325 #endif 326 327 struct rhashtable fdb_hash_tbl; 328 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 329 union { 330 struct rtable fake_rtable; 331 struct rt6_info fake_rt6_info; 332 }; 333 bool nf_call_iptables; 334 bool nf_call_ip6tables; 335 bool nf_call_arptables; 336 #endif 337 u16 group_fwd_mask; 338 u16 group_fwd_mask_required; 339 340 /* STP */ 341 bridge_id designated_root; 342 bridge_id bridge_id; 343 u32 root_path_cost; 344 unsigned char topology_change; 345 unsigned char topology_change_detected; 346 u16 root_port; 347 unsigned long max_age; 348 unsigned long hello_time; 349 unsigned long forward_delay; 350 unsigned long ageing_time; 351 unsigned long bridge_max_age; 352 unsigned long bridge_hello_time; 353 unsigned long bridge_forward_delay; 354 unsigned long bridge_ageing_time; 355 356 u8 group_addr[ETH_ALEN]; 357 bool group_addr_set; 358 359 enum { 360 BR_NO_STP, /* no spanning tree */ 361 BR_KERNEL_STP, /* old STP in kernel */ 362 BR_USER_STP, /* new RSTP in userspace */ 363 } stp_enabled; 364 365 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 366 unsigned char multicast_router; 367 368 u8 multicast_disabled:1; 369 u8 multicast_querier:1; 370 u8 multicast_query_use_ifaddr:1; 371 u8 has_ipv6_addr:1; 372 u8 multicast_stats_enabled:1; 373 374 u32 hash_elasticity; 375 u32 hash_max; 376 377 u32 multicast_last_member_count; 378 u32 multicast_startup_query_count; 379 380 u8 multicast_igmp_version; 381 382 unsigned long multicast_last_member_interval; 383 unsigned long multicast_membership_interval; 384 unsigned long multicast_querier_interval; 385 unsigned long multicast_query_interval; 386 unsigned long multicast_query_response_interval; 387 unsigned long multicast_startup_query_interval; 388 389 spinlock_t multicast_lock; 390 struct net_bridge_mdb_htable __rcu *mdb; 391 struct hlist_head router_list; 392 393 struct timer_list multicast_router_timer; 394 struct bridge_mcast_other_query ip4_other_query; 395 struct bridge_mcast_own_query ip4_own_query; 396 struct bridge_mcast_querier ip4_querier; 397 struct bridge_mcast_stats __percpu *mcast_stats; 398 #if IS_ENABLED(CONFIG_IPV6) 399 struct bridge_mcast_other_query ip6_other_query; 400 struct bridge_mcast_own_query ip6_own_query; 401 struct bridge_mcast_querier ip6_querier; 402 u8 multicast_mld_version; 403 #endif /* IS_ENABLED(CONFIG_IPV6) */ 404 #endif 405 406 struct timer_list hello_timer; 407 struct timer_list tcn_timer; 408 struct timer_list topology_change_timer; 409 struct delayed_work gc_work; 410 struct kobject *ifobj; 411 u32 auto_cnt; 412 413 #ifdef CONFIG_NET_SWITCHDEV 414 int offload_fwd_mark; 415 #endif 416 bool neigh_suppress_enabled; 417 bool mtu_set_by_user; 418 struct hlist_head fdb_list; 419 }; 420 421 struct br_input_skb_cb { 422 struct net_device *brdev; 423 424 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 425 int igmp; 426 int mrouters_only; 427 #endif 428 429 bool proxyarp_replied; 430 bool src_port_isolated; 431 432 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 433 bool vlan_filtered; 434 #endif 435 436 #ifdef CONFIG_NET_SWITCHDEV 437 int offload_fwd_mark; 438 #endif 439 }; 440 441 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 442 443 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 444 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 445 #else 446 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 447 #endif 448 449 #define br_printk(level, br, format, args...) \ 450 printk(level "%s: " format, (br)->dev->name, ##args) 451 452 #define br_err(__br, format, args...) \ 453 br_printk(KERN_ERR, __br, format, ##args) 454 #define br_warn(__br, format, args...) \ 455 br_printk(KERN_WARNING, __br, format, ##args) 456 #define br_notice(__br, format, args...) \ 457 br_printk(KERN_NOTICE, __br, format, ##args) 458 #define br_info(__br, format, args...) \ 459 br_printk(KERN_INFO, __br, format, ##args) 460 461 #define br_debug(br, format, args...) \ 462 pr_debug("%s: " format, (br)->dev->name, ##args) 463 464 /* called under bridge lock */ 465 static inline int br_is_root_bridge(const struct net_bridge *br) 466 { 467 return !memcmp(&br->bridge_id, &br->designated_root, 8); 468 } 469 470 /* check if a VLAN entry is global */ 471 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 472 { 473 return v->flags & BRIDGE_VLAN_INFO_MASTER; 474 } 475 476 /* check if a VLAN entry is used by the bridge */ 477 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 478 { 479 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 480 } 481 482 /* check if we should use the vlan entry, returns false if it's only context */ 483 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 484 { 485 if (br_vlan_is_master(v)) { 486 if (br_vlan_is_brentry(v)) 487 return true; 488 else 489 return false; 490 } 491 492 return true; 493 } 494 495 /* br_device.c */ 496 void br_dev_setup(struct net_device *dev); 497 void br_dev_delete(struct net_device *dev, struct list_head *list); 498 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 499 #ifdef CONFIG_NET_POLL_CONTROLLER 500 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 501 struct sk_buff *skb) 502 { 503 struct netpoll *np = p->np; 504 505 if (np) 506 netpoll_send_skb(np, skb); 507 } 508 509 int br_netpoll_enable(struct net_bridge_port *p); 510 void br_netpoll_disable(struct net_bridge_port *p); 511 #else 512 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 513 struct sk_buff *skb) 514 { 515 } 516 517 static inline int br_netpoll_enable(struct net_bridge_port *p) 518 { 519 return 0; 520 } 521 522 static inline void br_netpoll_disable(struct net_bridge_port *p) 523 { 524 } 525 #endif 526 527 /* br_fdb.c */ 528 int br_fdb_init(void); 529 void br_fdb_fini(void); 530 int br_fdb_hash_init(struct net_bridge *br); 531 void br_fdb_hash_fini(struct net_bridge *br); 532 void br_fdb_flush(struct net_bridge *br); 533 void br_fdb_find_delete_local(struct net_bridge *br, 534 const struct net_bridge_port *p, 535 const unsigned char *addr, u16 vid); 536 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 537 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 538 void br_fdb_cleanup(struct work_struct *work); 539 void br_fdb_delete_by_port(struct net_bridge *br, 540 const struct net_bridge_port *p, u16 vid, int do_all); 541 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 542 const unsigned char *addr, 543 __u16 vid); 544 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 545 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 546 unsigned long off); 547 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 548 const unsigned char *addr, u16 vid); 549 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 550 const unsigned char *addr, u16 vid, bool added_by_user); 551 552 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 553 struct net_device *dev, const unsigned char *addr, u16 vid); 554 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 555 const unsigned char *addr, u16 vid, u16 nlh_flags); 556 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 557 struct net_device *dev, struct net_device *fdev, int *idx); 558 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 559 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 560 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 561 const unsigned char *addr, u16 vid, 562 bool swdev_notify); 563 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 564 const unsigned char *addr, u16 vid, 565 bool swdev_notify); 566 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 567 const unsigned char *addr, u16 vid); 568 569 /* br_forward.c */ 570 enum br_pkt_type { 571 BR_PKT_UNICAST, 572 BR_PKT_MULTICAST, 573 BR_PKT_BROADCAST 574 }; 575 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 576 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 577 bool local_rcv, bool local_orig); 578 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 579 void br_flood(struct net_bridge *br, struct sk_buff *skb, 580 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 581 582 /* return true if both source port and dest port are isolated */ 583 static inline bool br_skb_isolated(const struct net_bridge_port *to, 584 const struct sk_buff *skb) 585 { 586 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 587 (to->flags & BR_ISOLATED); 588 } 589 590 /* br_if.c */ 591 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 592 int br_add_bridge(struct net *net, const char *name); 593 int br_del_bridge(struct net *net, const char *name); 594 int br_add_if(struct net_bridge *br, struct net_device *dev, 595 struct netlink_ext_ack *extack); 596 int br_del_if(struct net_bridge *br, struct net_device *dev); 597 void br_mtu_auto_adjust(struct net_bridge *br); 598 netdev_features_t br_features_recompute(struct net_bridge *br, 599 netdev_features_t features); 600 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 601 void br_manage_promisc(struct net_bridge *br); 602 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 603 604 /* br_input.c */ 605 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 606 rx_handler_result_t br_handle_frame(struct sk_buff **pskb); 607 608 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 609 { 610 return rcu_dereference(dev->rx_handler) == br_handle_frame; 611 } 612 613 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 614 { 615 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame; 616 } 617 618 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 619 { 620 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 621 } 622 623 static inline struct net_bridge_port * 624 br_port_get_check_rtnl(const struct net_device *dev) 625 { 626 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 627 } 628 629 /* br_ioctl.c */ 630 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 631 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 632 void __user *arg); 633 634 /* br_multicast.c */ 635 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 636 extern unsigned int br_mdb_rehash_seq; 637 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 638 struct sk_buff *skb, u16 vid); 639 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 640 struct sk_buff *skb, u16 vid); 641 int br_multicast_add_port(struct net_bridge_port *port); 642 void br_multicast_del_port(struct net_bridge_port *port); 643 void br_multicast_enable_port(struct net_bridge_port *port); 644 void br_multicast_disable_port(struct net_bridge_port *port); 645 void br_multicast_init(struct net_bridge *br); 646 void br_multicast_open(struct net_bridge *br); 647 void br_multicast_stop(struct net_bridge *br); 648 void br_multicast_dev_del(struct net_bridge *br); 649 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 650 struct sk_buff *skb, bool local_rcv, bool local_orig); 651 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 652 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 653 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 654 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 655 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 656 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 657 #if IS_ENABLED(CONFIG_IPV6) 658 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 659 #endif 660 struct net_bridge_mdb_entry * 661 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst); 662 struct net_bridge_mdb_entry * 663 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port, 664 struct br_ip *group); 665 void br_multicast_free_pg(struct rcu_head *head); 666 struct net_bridge_port_group * 667 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 668 struct net_bridge_port_group __rcu *next, 669 unsigned char flags, const unsigned char *src); 670 void br_mdb_init(void); 671 void br_mdb_uninit(void); 672 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port, 673 struct br_ip *group, int type, u8 flags); 674 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 675 int type); 676 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 677 const struct sk_buff *skb, u8 type, u8 dir); 678 int br_multicast_init_stats(struct net_bridge *br); 679 void br_multicast_uninit_stats(struct net_bridge *br); 680 void br_multicast_get_stats(const struct net_bridge *br, 681 const struct net_bridge_port *p, 682 struct br_mcast_stats *dest); 683 684 #define mlock_dereference(X, br) \ 685 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 686 687 static inline bool br_multicast_is_router(struct net_bridge *br) 688 { 689 return br->multicast_router == 2 || 690 (br->multicast_router == 1 && 691 timer_pending(&br->multicast_router_timer)); 692 } 693 694 static inline bool 695 __br_multicast_querier_exists(struct net_bridge *br, 696 struct bridge_mcast_other_query *querier, 697 const bool is_ipv6) 698 { 699 bool own_querier_enabled; 700 701 if (br->multicast_querier) { 702 if (is_ipv6 && !br->has_ipv6_addr) 703 own_querier_enabled = false; 704 else 705 own_querier_enabled = true; 706 } else { 707 own_querier_enabled = false; 708 } 709 710 return time_is_before_jiffies(querier->delay_time) && 711 (own_querier_enabled || timer_pending(&querier->timer)); 712 } 713 714 static inline bool br_multicast_querier_exists(struct net_bridge *br, 715 struct ethhdr *eth) 716 { 717 switch (eth->h_proto) { 718 case (htons(ETH_P_IP)): 719 return __br_multicast_querier_exists(br, 720 &br->ip4_other_query, false); 721 #if IS_ENABLED(CONFIG_IPV6) 722 case (htons(ETH_P_IPV6)): 723 return __br_multicast_querier_exists(br, 724 &br->ip6_other_query, true); 725 #endif 726 default: 727 return false; 728 } 729 } 730 731 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 732 { 733 return BR_INPUT_SKB_CB(skb)->igmp; 734 } 735 #else 736 static inline int br_multicast_rcv(struct net_bridge *br, 737 struct net_bridge_port *port, 738 struct sk_buff *skb, 739 u16 vid) 740 { 741 return 0; 742 } 743 744 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 745 struct sk_buff *skb, u16 vid) 746 { 747 return NULL; 748 } 749 750 static inline int br_multicast_add_port(struct net_bridge_port *port) 751 { 752 return 0; 753 } 754 755 static inline void br_multicast_del_port(struct net_bridge_port *port) 756 { 757 } 758 759 static inline void br_multicast_enable_port(struct net_bridge_port *port) 760 { 761 } 762 763 static inline void br_multicast_disable_port(struct net_bridge_port *port) 764 { 765 } 766 767 static inline void br_multicast_init(struct net_bridge *br) 768 { 769 } 770 771 static inline void br_multicast_open(struct net_bridge *br) 772 { 773 } 774 775 static inline void br_multicast_stop(struct net_bridge *br) 776 { 777 } 778 779 static inline void br_multicast_dev_del(struct net_bridge *br) 780 { 781 } 782 783 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 784 struct sk_buff *skb, 785 bool local_rcv, bool local_orig) 786 { 787 } 788 789 static inline bool br_multicast_is_router(struct net_bridge *br) 790 { 791 return false; 792 } 793 794 static inline bool br_multicast_querier_exists(struct net_bridge *br, 795 struct ethhdr *eth) 796 { 797 return false; 798 } 799 800 static inline void br_mdb_init(void) 801 { 802 } 803 804 static inline void br_mdb_uninit(void) 805 { 806 } 807 808 static inline void br_multicast_count(struct net_bridge *br, 809 const struct net_bridge_port *p, 810 const struct sk_buff *skb, 811 u8 type, u8 dir) 812 { 813 } 814 815 static inline int br_multicast_init_stats(struct net_bridge *br) 816 { 817 return 0; 818 } 819 820 static inline void br_multicast_uninit_stats(struct net_bridge *br) 821 { 822 } 823 824 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 825 { 826 return 0; 827 } 828 #endif 829 830 /* br_vlan.c */ 831 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 832 bool br_allowed_ingress(const struct net_bridge *br, 833 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 834 u16 *vid); 835 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 836 const struct sk_buff *skb); 837 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 838 struct sk_buff *br_handle_vlan(struct net_bridge *br, 839 const struct net_bridge_port *port, 840 struct net_bridge_vlan_group *vg, 841 struct sk_buff *skb); 842 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 843 bool *changed); 844 int br_vlan_delete(struct net_bridge *br, u16 vid); 845 void br_vlan_flush(struct net_bridge *br); 846 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 847 void br_recalculate_fwd_mask(struct net_bridge *br); 848 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 849 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 850 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 851 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 852 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 853 int br_vlan_init(struct net_bridge *br); 854 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 855 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid); 856 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 857 bool *changed); 858 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 859 void nbp_vlan_flush(struct net_bridge_port *port); 860 int nbp_vlan_init(struct net_bridge_port *port); 861 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 862 void br_vlan_get_stats(const struct net_bridge_vlan *v, 863 struct br_vlan_stats *stats); 864 865 static inline struct net_bridge_vlan_group *br_vlan_group( 866 const struct net_bridge *br) 867 { 868 return rtnl_dereference(br->vlgrp); 869 } 870 871 static inline struct net_bridge_vlan_group *nbp_vlan_group( 872 const struct net_bridge_port *p) 873 { 874 return rtnl_dereference(p->vlgrp); 875 } 876 877 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 878 const struct net_bridge *br) 879 { 880 return rcu_dereference(br->vlgrp); 881 } 882 883 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 884 const struct net_bridge_port *p) 885 { 886 return rcu_dereference(p->vlgrp); 887 } 888 889 /* Since bridge now depends on 8021Q module, but the time bridge sees the 890 * skb, the vlan tag will always be present if the frame was tagged. 891 */ 892 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 893 { 894 int err = 0; 895 896 if (skb_vlan_tag_present(skb)) { 897 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK; 898 } else { 899 *vid = 0; 900 err = -EINVAL; 901 } 902 903 return err; 904 } 905 906 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 907 { 908 if (!vg) 909 return 0; 910 911 smp_rmb(); 912 return vg->pvid; 913 } 914 915 #else 916 static inline bool br_allowed_ingress(const struct net_bridge *br, 917 struct net_bridge_vlan_group *vg, 918 struct sk_buff *skb, 919 u16 *vid) 920 { 921 return true; 922 } 923 924 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 925 const struct sk_buff *skb) 926 { 927 return true; 928 } 929 930 static inline bool br_should_learn(struct net_bridge_port *p, 931 struct sk_buff *skb, u16 *vid) 932 { 933 return true; 934 } 935 936 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 937 const struct net_bridge_port *port, 938 struct net_bridge_vlan_group *vg, 939 struct sk_buff *skb) 940 { 941 return skb; 942 } 943 944 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 945 bool *changed) 946 { 947 *changed = false; 948 return -EOPNOTSUPP; 949 } 950 951 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 952 { 953 return -EOPNOTSUPP; 954 } 955 956 static inline void br_vlan_flush(struct net_bridge *br) 957 { 958 } 959 960 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 961 { 962 } 963 964 static inline int br_vlan_init(struct net_bridge *br) 965 { 966 return 0; 967 } 968 969 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 970 bool *changed) 971 { 972 *changed = false; 973 return -EOPNOTSUPP; 974 } 975 976 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 977 { 978 return -EOPNOTSUPP; 979 } 980 981 static inline void nbp_vlan_flush(struct net_bridge_port *port) 982 { 983 } 984 985 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 986 u16 vid) 987 { 988 return NULL; 989 } 990 991 static inline int nbp_vlan_init(struct net_bridge_port *port) 992 { 993 return 0; 994 } 995 996 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 997 { 998 return 0; 999 } 1000 1001 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1002 { 1003 return 0; 1004 } 1005 1006 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1007 unsigned long val) 1008 { 1009 return -EOPNOTSUPP; 1010 } 1011 1012 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1013 u32 filter_mask) 1014 { 1015 return 0; 1016 } 1017 1018 static inline struct net_bridge_vlan_group *br_vlan_group( 1019 const struct net_bridge *br) 1020 { 1021 return NULL; 1022 } 1023 1024 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1025 const struct net_bridge_port *p) 1026 { 1027 return NULL; 1028 } 1029 1030 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1031 const struct net_bridge *br) 1032 { 1033 return NULL; 1034 } 1035 1036 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1037 const struct net_bridge_port *p) 1038 { 1039 return NULL; 1040 } 1041 1042 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1043 struct br_vlan_stats *stats) 1044 { 1045 } 1046 #endif 1047 1048 struct nf_br_ops { 1049 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1050 }; 1051 extern const struct nf_br_ops __rcu *nf_br_ops; 1052 1053 /* br_netfilter.c */ 1054 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1055 int br_nf_core_init(void); 1056 void br_nf_core_fini(void); 1057 void br_netfilter_rtable_init(struct net_bridge *); 1058 #else 1059 static inline int br_nf_core_init(void) { return 0; } 1060 static inline void br_nf_core_fini(void) {} 1061 #define br_netfilter_rtable_init(x) 1062 #endif 1063 1064 /* br_stp.c */ 1065 void br_set_state(struct net_bridge_port *p, unsigned int state); 1066 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1067 void br_init_port(struct net_bridge_port *p); 1068 void br_become_designated_port(struct net_bridge_port *p); 1069 1070 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1071 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1072 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1073 int br_set_max_age(struct net_bridge *br, unsigned long x); 1074 int __set_ageing_time(struct net_device *dev, unsigned long t); 1075 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1076 1077 1078 /* br_stp_if.c */ 1079 void br_stp_enable_bridge(struct net_bridge *br); 1080 void br_stp_disable_bridge(struct net_bridge *br); 1081 void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 1082 void br_stp_enable_port(struct net_bridge_port *p); 1083 void br_stp_disable_port(struct net_bridge_port *p); 1084 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1085 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1086 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1087 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1088 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1089 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1090 1091 /* br_stp_bpdu.c */ 1092 struct stp_proto; 1093 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1094 struct net_device *dev); 1095 1096 /* br_stp_timer.c */ 1097 void br_stp_timer_init(struct net_bridge *br); 1098 void br_stp_port_timer_init(struct net_bridge_port *p); 1099 unsigned long br_timer_value(const struct timer_list *timer); 1100 1101 /* br.c */ 1102 #if IS_ENABLED(CONFIG_ATM_LANE) 1103 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1104 #endif 1105 1106 /* br_netlink.c */ 1107 extern struct rtnl_link_ops br_link_ops; 1108 int br_netlink_init(void); 1109 void br_netlink_fini(void); 1110 void br_ifinfo_notify(int event, const struct net_bridge *br, 1111 const struct net_bridge_port *port); 1112 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1113 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1114 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1115 u32 filter_mask, int nlflags); 1116 1117 #ifdef CONFIG_SYSFS 1118 /* br_sysfs_if.c */ 1119 extern const struct sysfs_ops brport_sysfs_ops; 1120 int br_sysfs_addif(struct net_bridge_port *p); 1121 int br_sysfs_renameif(struct net_bridge_port *p); 1122 1123 /* br_sysfs_br.c */ 1124 int br_sysfs_addbr(struct net_device *dev); 1125 void br_sysfs_delbr(struct net_device *dev); 1126 1127 #else 1128 1129 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1130 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1131 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1132 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1133 #endif /* CONFIG_SYSFS */ 1134 1135 /* br_switchdev.c */ 1136 #ifdef CONFIG_NET_SWITCHDEV 1137 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1138 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1139 struct sk_buff *skb); 1140 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1141 const struct sk_buff *skb); 1142 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1143 unsigned long flags, 1144 unsigned long mask); 1145 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1146 int type); 1147 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags); 1148 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1149 1150 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1151 { 1152 skb->offload_fwd_mark = 0; 1153 } 1154 #else 1155 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1156 { 1157 return 0; 1158 } 1159 1160 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1161 struct sk_buff *skb) 1162 { 1163 } 1164 1165 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1166 const struct sk_buff *skb) 1167 { 1168 return true; 1169 } 1170 1171 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1172 unsigned long flags, 1173 unsigned long mask) 1174 { 1175 return 0; 1176 } 1177 1178 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1179 u16 vid, u16 flags) 1180 { 1181 return -EOPNOTSUPP; 1182 } 1183 1184 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1185 { 1186 return -EOPNOTSUPP; 1187 } 1188 1189 static inline void 1190 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1191 { 1192 } 1193 1194 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1195 { 1196 } 1197 #endif /* CONFIG_NET_SWITCHDEV */ 1198 1199 /* br_arp_nd_proxy.c */ 1200 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1201 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1202 u16 vid, struct net_bridge_port *p); 1203 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1204 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1205 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1206 #endif 1207