1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 struct br_vlan_stats { 93 u64 rx_bytes; 94 u64 rx_packets; 95 u64 tx_bytes; 96 u64 tx_packets; 97 struct u64_stats_sync syncp; 98 }; 99 100 struct br_tunnel_info { 101 __be64 tunnel_id; 102 struct metadata_dst *tunnel_dst; 103 }; 104 105 /* private vlan flags */ 106 enum { 107 BR_VLFLAG_PER_PORT_STATS = BIT(0), 108 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 109 }; 110 111 /** 112 * struct net_bridge_vlan - per-vlan entry 113 * 114 * @vnode: rhashtable member 115 * @vid: VLAN id 116 * @flags: bridge vlan flags 117 * @priv_flags: private (in-kernel) bridge vlan flags 118 * @state: STP state (e.g. blocking, learning, forwarding) 119 * @stats: per-cpu VLAN statistics 120 * @br: if MASTER flag set, this points to a bridge struct 121 * @port: if MASTER flag unset, this points to a port struct 122 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 123 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 124 * for this VLAN entry 125 * @vlist: sorted list of VLAN entries 126 * @rcu: used for entry destruction 127 * 128 * This structure is shared between the global per-VLAN entries contained in 129 * the bridge rhashtable and the local per-port per-VLAN entries contained in 130 * the port's rhashtable. The union entries should be interpreted depending on 131 * the entry flags that are set. 132 */ 133 struct net_bridge_vlan { 134 struct rhash_head vnode; 135 struct rhash_head tnode; 136 u16 vid; 137 u16 flags; 138 u16 priv_flags; 139 u8 state; 140 struct br_vlan_stats __percpu *stats; 141 union { 142 struct net_bridge *br; 143 struct net_bridge_port *port; 144 }; 145 union { 146 refcount_t refcnt; 147 struct net_bridge_vlan *brvlan; 148 }; 149 150 struct br_tunnel_info tinfo; 151 152 struct list_head vlist; 153 154 struct rcu_head rcu; 155 }; 156 157 /** 158 * struct net_bridge_vlan_group 159 * 160 * @vlan_hash: VLAN entry rhashtable 161 * @vlan_list: sorted VLAN entry list 162 * @num_vlans: number of total VLAN entries 163 * @pvid: PVID VLAN id 164 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 165 * 166 * IMPORTANT: Be careful when checking if there're VLAN entries using list 167 * primitives because the bridge can have entries in its list which 168 * are just for global context but not for filtering, i.e. they have 169 * the master flag set but not the brentry flag. If you have to check 170 * if there're "real" entries in the bridge please test @num_vlans 171 */ 172 struct net_bridge_vlan_group { 173 struct rhashtable vlan_hash; 174 struct rhashtable tunnel_hash; 175 struct list_head vlan_list; 176 u16 num_vlans; 177 u16 pvid; 178 u8 pvid_state; 179 }; 180 181 /* bridge fdb flags */ 182 enum { 183 BR_FDB_LOCAL, 184 BR_FDB_STATIC, 185 BR_FDB_STICKY, 186 BR_FDB_ADDED_BY_USER, 187 BR_FDB_ADDED_BY_EXT_LEARN, 188 BR_FDB_OFFLOADED, 189 BR_FDB_NOTIFY, 190 BR_FDB_NOTIFY_INACTIVE 191 }; 192 193 struct net_bridge_fdb_key { 194 mac_addr addr; 195 u16 vlan_id; 196 }; 197 198 struct net_bridge_fdb_entry { 199 struct rhash_head rhnode; 200 struct net_bridge_port *dst; 201 202 struct net_bridge_fdb_key key; 203 struct hlist_node fdb_node; 204 unsigned long flags; 205 206 /* write-heavy members should not affect lookups */ 207 unsigned long updated ____cacheline_aligned_in_smp; 208 unsigned long used; 209 210 struct rcu_head rcu; 211 }; 212 213 #define MDB_PG_FLAGS_PERMANENT BIT(0) 214 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 216 217 #define PG_SRC_ENT_LIMIT 32 218 219 #define BR_SGRP_F_DELETE BIT(0) 220 #define BR_SGRP_F_SEND BIT(1) 221 222 struct net_bridge_group_src { 223 struct hlist_node node; 224 225 struct br_ip addr; 226 struct net_bridge_port_group *pg; 227 u8 flags; 228 u8 src_query_rexmit_cnt; 229 struct timer_list timer; 230 231 struct net_bridge *br; 232 struct hlist_node del_node; 233 struct rcu_head rcu; 234 }; 235 236 struct net_bridge_port_group { 237 struct net_bridge_port *port; 238 struct net_bridge_port_group __rcu *next; 239 struct br_ip addr; 240 unsigned char eth_addr[ETH_ALEN] __aligned(2); 241 unsigned char flags; 242 unsigned char filter_mode; 243 unsigned char grp_query_rexmit_cnt; 244 245 struct hlist_head src_list; 246 unsigned int src_ents; 247 struct timer_list timer; 248 struct timer_list rexmit_timer; 249 struct hlist_node mglist; 250 251 struct rcu_head rcu; 252 }; 253 254 struct net_bridge_mdb_entry { 255 struct rhash_head rhnode; 256 struct net_bridge *br; 257 struct net_bridge_port_group __rcu *ports; 258 struct br_ip addr; 259 bool host_joined; 260 261 struct timer_list timer; 262 struct hlist_node mdb_node; 263 264 struct rcu_head rcu; 265 }; 266 267 struct net_bridge_port { 268 struct net_bridge *br; 269 struct net_device *dev; 270 struct list_head list; 271 272 unsigned long flags; 273 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 274 struct net_bridge_vlan_group __rcu *vlgrp; 275 #endif 276 struct net_bridge_port __rcu *backup_port; 277 278 /* STP */ 279 u8 priority; 280 u8 state; 281 u16 port_no; 282 unsigned char topology_change_ack; 283 unsigned char config_pending; 284 port_id port_id; 285 port_id designated_port; 286 bridge_id designated_root; 287 bridge_id designated_bridge; 288 u32 path_cost; 289 u32 designated_cost; 290 unsigned long designated_age; 291 292 struct timer_list forward_delay_timer; 293 struct timer_list hold_timer; 294 struct timer_list message_age_timer; 295 struct kobject kobj; 296 struct rcu_head rcu; 297 298 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 299 struct bridge_mcast_own_query ip4_own_query; 300 #if IS_ENABLED(CONFIG_IPV6) 301 struct bridge_mcast_own_query ip6_own_query; 302 #endif /* IS_ENABLED(CONFIG_IPV6) */ 303 unsigned char multicast_router; 304 struct bridge_mcast_stats __percpu *mcast_stats; 305 struct timer_list multicast_router_timer; 306 struct hlist_head mglist; 307 struct hlist_node rlist; 308 #endif 309 310 #ifdef CONFIG_SYSFS 311 char sysfs_name[IFNAMSIZ]; 312 #endif 313 314 #ifdef CONFIG_NET_POLL_CONTROLLER 315 struct netpoll *np; 316 #endif 317 #ifdef CONFIG_NET_SWITCHDEV 318 int offload_fwd_mark; 319 #endif 320 u16 group_fwd_mask; 321 u16 backup_redirected_cnt; 322 323 struct bridge_stp_xstats stp_xstats; 324 }; 325 326 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 327 328 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 329 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 330 331 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 332 { 333 return rcu_dereference(dev->rx_handler_data); 334 } 335 336 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 337 { 338 return netif_is_bridge_port(dev) ? 339 rtnl_dereference(dev->rx_handler_data) : NULL; 340 } 341 342 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 343 { 344 return netif_is_bridge_port(dev) ? 345 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 346 } 347 348 enum net_bridge_opts { 349 BROPT_VLAN_ENABLED, 350 BROPT_VLAN_STATS_ENABLED, 351 BROPT_NF_CALL_IPTABLES, 352 BROPT_NF_CALL_IP6TABLES, 353 BROPT_NF_CALL_ARPTABLES, 354 BROPT_GROUP_ADDR_SET, 355 BROPT_MULTICAST_ENABLED, 356 BROPT_MULTICAST_QUERIER, 357 BROPT_MULTICAST_QUERY_USE_IFADDR, 358 BROPT_MULTICAST_STATS_ENABLED, 359 BROPT_HAS_IPV6_ADDR, 360 BROPT_NEIGH_SUPPRESS_ENABLED, 361 BROPT_MTU_SET_BY_USER, 362 BROPT_VLAN_STATS_PER_PORT, 363 BROPT_NO_LL_LEARN, 364 BROPT_VLAN_BRIDGE_BINDING, 365 }; 366 367 struct net_bridge { 368 spinlock_t lock; 369 spinlock_t hash_lock; 370 struct list_head port_list; 371 struct net_device *dev; 372 struct pcpu_sw_netstats __percpu *stats; 373 unsigned long options; 374 /* These fields are accessed on each packet */ 375 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 376 __be16 vlan_proto; 377 u16 default_pvid; 378 struct net_bridge_vlan_group __rcu *vlgrp; 379 #endif 380 381 struct rhashtable fdb_hash_tbl; 382 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 383 union { 384 struct rtable fake_rtable; 385 struct rt6_info fake_rt6_info; 386 }; 387 #endif 388 u16 group_fwd_mask; 389 u16 group_fwd_mask_required; 390 391 /* STP */ 392 bridge_id designated_root; 393 bridge_id bridge_id; 394 unsigned char topology_change; 395 unsigned char topology_change_detected; 396 u16 root_port; 397 unsigned long max_age; 398 unsigned long hello_time; 399 unsigned long forward_delay; 400 unsigned long ageing_time; 401 unsigned long bridge_max_age; 402 unsigned long bridge_hello_time; 403 unsigned long bridge_forward_delay; 404 unsigned long bridge_ageing_time; 405 u32 root_path_cost; 406 407 u8 group_addr[ETH_ALEN]; 408 409 enum { 410 BR_NO_STP, /* no spanning tree */ 411 BR_KERNEL_STP, /* old STP in kernel */ 412 BR_USER_STP, /* new RSTP in userspace */ 413 } stp_enabled; 414 415 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 416 417 u32 hash_max; 418 419 u32 multicast_last_member_count; 420 u32 multicast_startup_query_count; 421 422 u8 multicast_igmp_version; 423 u8 multicast_router; 424 #if IS_ENABLED(CONFIG_IPV6) 425 u8 multicast_mld_version; 426 #endif 427 spinlock_t multicast_lock; 428 unsigned long multicast_last_member_interval; 429 unsigned long multicast_membership_interval; 430 unsigned long multicast_querier_interval; 431 unsigned long multicast_query_interval; 432 unsigned long multicast_query_response_interval; 433 unsigned long multicast_startup_query_interval; 434 435 struct rhashtable mdb_hash_tbl; 436 437 struct hlist_head src_gc_list; 438 struct hlist_head mdb_list; 439 struct hlist_head router_list; 440 441 struct timer_list multicast_router_timer; 442 struct bridge_mcast_other_query ip4_other_query; 443 struct bridge_mcast_own_query ip4_own_query; 444 struct bridge_mcast_querier ip4_querier; 445 struct bridge_mcast_stats __percpu *mcast_stats; 446 #if IS_ENABLED(CONFIG_IPV6) 447 struct bridge_mcast_other_query ip6_other_query; 448 struct bridge_mcast_own_query ip6_own_query; 449 struct bridge_mcast_querier ip6_querier; 450 #endif /* IS_ENABLED(CONFIG_IPV6) */ 451 struct work_struct src_gc_work; 452 #endif 453 454 struct timer_list hello_timer; 455 struct timer_list tcn_timer; 456 struct timer_list topology_change_timer; 457 struct delayed_work gc_work; 458 struct kobject *ifobj; 459 u32 auto_cnt; 460 461 #ifdef CONFIG_NET_SWITCHDEV 462 int offload_fwd_mark; 463 #endif 464 struct hlist_head fdb_list; 465 466 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 467 struct list_head mrp_list; 468 #endif 469 }; 470 471 struct br_input_skb_cb { 472 struct net_device *brdev; 473 474 u16 frag_max_size; 475 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 476 u8 igmp; 477 u8 mrouters_only:1; 478 #endif 479 u8 proxyarp_replied:1; 480 u8 src_port_isolated:1; 481 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 482 u8 vlan_filtered:1; 483 #endif 484 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 485 u8 br_netfilter_broute:1; 486 #endif 487 488 #ifdef CONFIG_NET_SWITCHDEV 489 int offload_fwd_mark; 490 #endif 491 }; 492 493 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 494 495 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 496 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 497 #else 498 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 499 #endif 500 501 #define br_printk(level, br, format, args...) \ 502 printk(level "%s: " format, (br)->dev->name, ##args) 503 504 #define br_err(__br, format, args...) \ 505 br_printk(KERN_ERR, __br, format, ##args) 506 #define br_warn(__br, format, args...) \ 507 br_printk(KERN_WARNING, __br, format, ##args) 508 #define br_notice(__br, format, args...) \ 509 br_printk(KERN_NOTICE, __br, format, ##args) 510 #define br_info(__br, format, args...) \ 511 br_printk(KERN_INFO, __br, format, ##args) 512 513 #define br_debug(br, format, args...) \ 514 pr_debug("%s: " format, (br)->dev->name, ##args) 515 516 /* called under bridge lock */ 517 static inline int br_is_root_bridge(const struct net_bridge *br) 518 { 519 return !memcmp(&br->bridge_id, &br->designated_root, 8); 520 } 521 522 /* check if a VLAN entry is global */ 523 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 524 { 525 return v->flags & BRIDGE_VLAN_INFO_MASTER; 526 } 527 528 /* check if a VLAN entry is used by the bridge */ 529 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 530 { 531 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 532 } 533 534 /* check if we should use the vlan entry, returns false if it's only context */ 535 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 536 { 537 if (br_vlan_is_master(v)) { 538 if (br_vlan_is_brentry(v)) 539 return true; 540 else 541 return false; 542 } 543 544 return true; 545 } 546 547 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 548 { 549 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 550 } 551 552 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 553 { 554 bool ret = vid > 0 && vid < VLAN_VID_MASK; 555 556 if (!ret) 557 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 558 559 return ret; 560 } 561 562 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 563 const struct bridge_vlan_info *last, 564 struct netlink_ext_ack *extack) 565 { 566 /* pvid flag is not allowed in ranges */ 567 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 568 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 569 return false; 570 } 571 572 /* when cur is the range end, check if: 573 * - it has range start flag 574 * - range ids are invalid (end is equal to or before start) 575 */ 576 if (last) { 577 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 578 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 579 return false; 580 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 581 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 582 return false; 583 } else if (cur->vid <= last->vid) { 584 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 585 return false; 586 } 587 } 588 589 /* check for required range flags */ 590 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 591 BRIDGE_VLAN_INFO_RANGE_END))) { 592 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 593 return false; 594 } 595 596 return true; 597 } 598 599 static inline int br_afspec_cmd_to_rtm(int cmd) 600 { 601 switch (cmd) { 602 case RTM_SETLINK: 603 return RTM_NEWVLAN; 604 case RTM_DELLINK: 605 return RTM_DELVLAN; 606 } 607 608 return 0; 609 } 610 611 static inline int br_opt_get(const struct net_bridge *br, 612 enum net_bridge_opts opt) 613 { 614 return test_bit(opt, &br->options); 615 } 616 617 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 618 struct netlink_ext_ack *extack); 619 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 620 int br_boolopt_multi_toggle(struct net_bridge *br, 621 struct br_boolopt_multi *bm, 622 struct netlink_ext_ack *extack); 623 void br_boolopt_multi_get(const struct net_bridge *br, 624 struct br_boolopt_multi *bm); 625 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 626 627 /* br_device.c */ 628 void br_dev_setup(struct net_device *dev); 629 void br_dev_delete(struct net_device *dev, struct list_head *list); 630 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 631 #ifdef CONFIG_NET_POLL_CONTROLLER 632 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 633 struct sk_buff *skb) 634 { 635 netpoll_send_skb(p->np, skb); 636 } 637 638 int br_netpoll_enable(struct net_bridge_port *p); 639 void br_netpoll_disable(struct net_bridge_port *p); 640 #else 641 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 642 struct sk_buff *skb) 643 { 644 } 645 646 static inline int br_netpoll_enable(struct net_bridge_port *p) 647 { 648 return 0; 649 } 650 651 static inline void br_netpoll_disable(struct net_bridge_port *p) 652 { 653 } 654 #endif 655 656 /* br_fdb.c */ 657 int br_fdb_init(void); 658 void br_fdb_fini(void); 659 int br_fdb_hash_init(struct net_bridge *br); 660 void br_fdb_hash_fini(struct net_bridge *br); 661 void br_fdb_flush(struct net_bridge *br); 662 void br_fdb_find_delete_local(struct net_bridge *br, 663 const struct net_bridge_port *p, 664 const unsigned char *addr, u16 vid); 665 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 666 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 667 void br_fdb_cleanup(struct work_struct *work); 668 void br_fdb_delete_by_port(struct net_bridge *br, 669 const struct net_bridge_port *p, u16 vid, int do_all); 670 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 671 const unsigned char *addr, 672 __u16 vid); 673 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 674 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 675 unsigned long off); 676 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 677 const unsigned char *addr, u16 vid); 678 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 679 const unsigned char *addr, u16 vid, unsigned long flags); 680 681 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 682 struct net_device *dev, const unsigned char *addr, u16 vid); 683 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 684 const unsigned char *addr, u16 vid, u16 nlh_flags, 685 struct netlink_ext_ack *extack); 686 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 687 struct net_device *dev, struct net_device *fdev, int *idx); 688 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 689 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 690 struct netlink_ext_ack *extack); 691 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 692 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 693 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 694 const unsigned char *addr, u16 vid, 695 bool swdev_notify); 696 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 697 const unsigned char *addr, u16 vid, 698 bool swdev_notify); 699 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 700 const unsigned char *addr, u16 vid, bool offloaded); 701 702 /* br_forward.c */ 703 enum br_pkt_type { 704 BR_PKT_UNICAST, 705 BR_PKT_MULTICAST, 706 BR_PKT_BROADCAST 707 }; 708 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 709 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 710 bool local_rcv, bool local_orig); 711 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 712 void br_flood(struct net_bridge *br, struct sk_buff *skb, 713 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 714 715 /* return true if both source port and dest port are isolated */ 716 static inline bool br_skb_isolated(const struct net_bridge_port *to, 717 const struct sk_buff *skb) 718 { 719 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 720 (to->flags & BR_ISOLATED); 721 } 722 723 /* br_if.c */ 724 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 725 int br_add_bridge(struct net *net, const char *name); 726 int br_del_bridge(struct net *net, const char *name); 727 int br_add_if(struct net_bridge *br, struct net_device *dev, 728 struct netlink_ext_ack *extack); 729 int br_del_if(struct net_bridge *br, struct net_device *dev); 730 void br_mtu_auto_adjust(struct net_bridge *br); 731 netdev_features_t br_features_recompute(struct net_bridge *br, 732 netdev_features_t features); 733 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 734 void br_manage_promisc(struct net_bridge *br); 735 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 736 737 /* br_input.c */ 738 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 739 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 740 741 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 742 { 743 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 744 } 745 746 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 747 { 748 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 749 } 750 751 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 752 { 753 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 754 } 755 756 static inline struct net_bridge_port * 757 br_port_get_check_rtnl(const struct net_device *dev) 758 { 759 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 760 } 761 762 /* br_ioctl.c */ 763 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 764 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 765 void __user *arg); 766 767 /* br_multicast.c */ 768 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 769 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 770 struct sk_buff *skb, u16 vid); 771 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 772 struct sk_buff *skb, u16 vid); 773 int br_multicast_add_port(struct net_bridge_port *port); 774 void br_multicast_del_port(struct net_bridge_port *port); 775 void br_multicast_enable_port(struct net_bridge_port *port); 776 void br_multicast_disable_port(struct net_bridge_port *port); 777 void br_multicast_init(struct net_bridge *br); 778 void br_multicast_open(struct net_bridge *br); 779 void br_multicast_stop(struct net_bridge *br); 780 void br_multicast_dev_del(struct net_bridge *br); 781 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 782 struct sk_buff *skb, bool local_rcv, bool local_orig); 783 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 784 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 785 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 786 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 787 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 788 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 789 #if IS_ENABLED(CONFIG_IPV6) 790 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 791 #endif 792 struct net_bridge_mdb_entry * 793 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 794 struct net_bridge_mdb_entry * 795 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 796 struct net_bridge_port_group * 797 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 798 struct net_bridge_port_group __rcu *next, 799 unsigned char flags, const unsigned char *src, 800 u8 filter_mode); 801 int br_mdb_hash_init(struct net_bridge *br); 802 void br_mdb_hash_fini(struct net_bridge *br); 803 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 804 struct net_bridge_port_group *pg, int type); 805 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 806 int type); 807 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 808 struct net_bridge_port_group *pg, 809 struct net_bridge_port_group __rcu **pp); 810 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 811 const struct sk_buff *skb, u8 type, u8 dir); 812 int br_multicast_init_stats(struct net_bridge *br); 813 void br_multicast_uninit_stats(struct net_bridge *br); 814 void br_multicast_get_stats(const struct net_bridge *br, 815 const struct net_bridge_port *p, 816 struct br_mcast_stats *dest); 817 void br_mdb_init(void); 818 void br_mdb_uninit(void); 819 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 820 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 821 822 #define mlock_dereference(X, br) \ 823 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 824 825 static inline bool br_multicast_is_router(struct net_bridge *br) 826 { 827 return br->multicast_router == 2 || 828 (br->multicast_router == 1 && 829 timer_pending(&br->multicast_router_timer)); 830 } 831 832 static inline bool 833 __br_multicast_querier_exists(struct net_bridge *br, 834 struct bridge_mcast_other_query *querier, 835 const bool is_ipv6) 836 { 837 bool own_querier_enabled; 838 839 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 840 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 841 own_querier_enabled = false; 842 else 843 own_querier_enabled = true; 844 } else { 845 own_querier_enabled = false; 846 } 847 848 return time_is_before_jiffies(querier->delay_time) && 849 (own_querier_enabled || timer_pending(&querier->timer)); 850 } 851 852 static inline bool br_multicast_querier_exists(struct net_bridge *br, 853 struct ethhdr *eth) 854 { 855 switch (eth->h_proto) { 856 case (htons(ETH_P_IP)): 857 return __br_multicast_querier_exists(br, 858 &br->ip4_other_query, false); 859 #if IS_ENABLED(CONFIG_IPV6) 860 case (htons(ETH_P_IPV6)): 861 return __br_multicast_querier_exists(br, 862 &br->ip6_other_query, true); 863 #endif 864 default: 865 return false; 866 } 867 } 868 869 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 870 { 871 return BR_INPUT_SKB_CB(skb)->igmp; 872 } 873 874 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 875 { 876 return br->multicast_last_member_interval * 877 br->multicast_last_member_count; 878 } 879 #else 880 static inline int br_multicast_rcv(struct net_bridge *br, 881 struct net_bridge_port *port, 882 struct sk_buff *skb, 883 u16 vid) 884 { 885 return 0; 886 } 887 888 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 889 struct sk_buff *skb, u16 vid) 890 { 891 return NULL; 892 } 893 894 static inline int br_multicast_add_port(struct net_bridge_port *port) 895 { 896 return 0; 897 } 898 899 static inline void br_multicast_del_port(struct net_bridge_port *port) 900 { 901 } 902 903 static inline void br_multicast_enable_port(struct net_bridge_port *port) 904 { 905 } 906 907 static inline void br_multicast_disable_port(struct net_bridge_port *port) 908 { 909 } 910 911 static inline void br_multicast_init(struct net_bridge *br) 912 { 913 } 914 915 static inline void br_multicast_open(struct net_bridge *br) 916 { 917 } 918 919 static inline void br_multicast_stop(struct net_bridge *br) 920 { 921 } 922 923 static inline void br_multicast_dev_del(struct net_bridge *br) 924 { 925 } 926 927 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 928 struct sk_buff *skb, 929 bool local_rcv, bool local_orig) 930 { 931 } 932 933 static inline bool br_multicast_is_router(struct net_bridge *br) 934 { 935 return false; 936 } 937 938 static inline bool br_multicast_querier_exists(struct net_bridge *br, 939 struct ethhdr *eth) 940 { 941 return false; 942 } 943 944 static inline void br_mdb_init(void) 945 { 946 } 947 948 static inline void br_mdb_uninit(void) 949 { 950 } 951 952 static inline int br_mdb_hash_init(struct net_bridge *br) 953 { 954 return 0; 955 } 956 957 static inline void br_mdb_hash_fini(struct net_bridge *br) 958 { 959 } 960 961 static inline void br_multicast_count(struct net_bridge *br, 962 const struct net_bridge_port *p, 963 const struct sk_buff *skb, 964 u8 type, u8 dir) 965 { 966 } 967 968 static inline int br_multicast_init_stats(struct net_bridge *br) 969 { 970 return 0; 971 } 972 973 static inline void br_multicast_uninit_stats(struct net_bridge *br) 974 { 975 } 976 977 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 978 { 979 return 0; 980 } 981 #endif 982 983 /* br_vlan.c */ 984 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 985 bool br_allowed_ingress(const struct net_bridge *br, 986 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 987 u16 *vid, u8 *state); 988 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 989 const struct sk_buff *skb); 990 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 991 struct sk_buff *br_handle_vlan(struct net_bridge *br, 992 const struct net_bridge_port *port, 993 struct net_bridge_vlan_group *vg, 994 struct sk_buff *skb); 995 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 996 bool *changed, struct netlink_ext_ack *extack); 997 int br_vlan_delete(struct net_bridge *br, u16 vid); 998 void br_vlan_flush(struct net_bridge *br); 999 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1000 void br_recalculate_fwd_mask(struct net_bridge *br); 1001 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1002 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1003 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1004 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1005 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1006 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1007 int br_vlan_init(struct net_bridge *br); 1008 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1009 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1010 struct netlink_ext_ack *extack); 1011 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1012 bool *changed, struct netlink_ext_ack *extack); 1013 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1014 void nbp_vlan_flush(struct net_bridge_port *port); 1015 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1016 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1017 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1018 struct br_vlan_stats *stats); 1019 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1020 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1021 void *ptr); 1022 void br_vlan_rtnl_init(void); 1023 void br_vlan_rtnl_uninit(void); 1024 void br_vlan_notify(const struct net_bridge *br, 1025 const struct net_bridge_port *p, 1026 u16 vid, u16 vid_range, 1027 int cmd); 1028 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1029 const struct net_bridge_vlan *range_end); 1030 1031 static inline struct net_bridge_vlan_group *br_vlan_group( 1032 const struct net_bridge *br) 1033 { 1034 return rtnl_dereference(br->vlgrp); 1035 } 1036 1037 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1038 const struct net_bridge_port *p) 1039 { 1040 return rtnl_dereference(p->vlgrp); 1041 } 1042 1043 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1044 const struct net_bridge *br) 1045 { 1046 return rcu_dereference(br->vlgrp); 1047 } 1048 1049 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1050 const struct net_bridge_port *p) 1051 { 1052 return rcu_dereference(p->vlgrp); 1053 } 1054 1055 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1056 * skb, the vlan tag will always be present if the frame was tagged. 1057 */ 1058 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1059 { 1060 int err = 0; 1061 1062 if (skb_vlan_tag_present(skb)) { 1063 *vid = skb_vlan_tag_get_id(skb); 1064 } else { 1065 *vid = 0; 1066 err = -EINVAL; 1067 } 1068 1069 return err; 1070 } 1071 1072 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1073 { 1074 if (!vg) 1075 return 0; 1076 1077 smp_rmb(); 1078 return vg->pvid; 1079 } 1080 1081 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1082 { 1083 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1084 } 1085 #else 1086 static inline bool br_allowed_ingress(const struct net_bridge *br, 1087 struct net_bridge_vlan_group *vg, 1088 struct sk_buff *skb, 1089 u16 *vid, u8 *state) 1090 { 1091 return true; 1092 } 1093 1094 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1095 const struct sk_buff *skb) 1096 { 1097 return true; 1098 } 1099 1100 static inline bool br_should_learn(struct net_bridge_port *p, 1101 struct sk_buff *skb, u16 *vid) 1102 { 1103 return true; 1104 } 1105 1106 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1107 const struct net_bridge_port *port, 1108 struct net_bridge_vlan_group *vg, 1109 struct sk_buff *skb) 1110 { 1111 return skb; 1112 } 1113 1114 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1115 bool *changed, struct netlink_ext_ack *extack) 1116 { 1117 *changed = false; 1118 return -EOPNOTSUPP; 1119 } 1120 1121 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1122 { 1123 return -EOPNOTSUPP; 1124 } 1125 1126 static inline void br_vlan_flush(struct net_bridge *br) 1127 { 1128 } 1129 1130 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1131 { 1132 } 1133 1134 static inline int br_vlan_init(struct net_bridge *br) 1135 { 1136 return 0; 1137 } 1138 1139 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1140 bool *changed, struct netlink_ext_ack *extack) 1141 { 1142 *changed = false; 1143 return -EOPNOTSUPP; 1144 } 1145 1146 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1147 { 1148 return -EOPNOTSUPP; 1149 } 1150 1151 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1152 { 1153 } 1154 1155 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1156 u16 vid) 1157 { 1158 return NULL; 1159 } 1160 1161 static inline int nbp_vlan_init(struct net_bridge_port *port, 1162 struct netlink_ext_ack *extack) 1163 { 1164 return 0; 1165 } 1166 1167 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1168 { 1169 return 0; 1170 } 1171 1172 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1173 { 1174 return 0; 1175 } 1176 1177 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1178 unsigned long val) 1179 { 1180 return -EOPNOTSUPP; 1181 } 1182 1183 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1184 u32 filter_mask) 1185 { 1186 return 0; 1187 } 1188 1189 static inline struct net_bridge_vlan_group *br_vlan_group( 1190 const struct net_bridge *br) 1191 { 1192 return NULL; 1193 } 1194 1195 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1196 const struct net_bridge_port *p) 1197 { 1198 return NULL; 1199 } 1200 1201 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1202 const struct net_bridge *br) 1203 { 1204 return NULL; 1205 } 1206 1207 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1208 const struct net_bridge_port *p) 1209 { 1210 return NULL; 1211 } 1212 1213 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1214 struct br_vlan_stats *stats) 1215 { 1216 } 1217 1218 static inline void br_vlan_port_event(struct net_bridge_port *p, 1219 unsigned long event) 1220 { 1221 } 1222 1223 static inline int br_vlan_bridge_event(struct net_device *dev, 1224 unsigned long event, void *ptr) 1225 { 1226 return 0; 1227 } 1228 1229 static inline void br_vlan_rtnl_init(void) 1230 { 1231 } 1232 1233 static inline void br_vlan_rtnl_uninit(void) 1234 { 1235 } 1236 1237 static inline void br_vlan_notify(const struct net_bridge *br, 1238 const struct net_bridge_port *p, 1239 u16 vid, u16 vid_range, 1240 int cmd) 1241 { 1242 } 1243 1244 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1245 const struct net_bridge_vlan *range_end) 1246 { 1247 return true; 1248 } 1249 #endif 1250 1251 /* br_vlan_options.c */ 1252 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1253 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1254 const struct net_bridge_vlan *range_end); 1255 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1256 size_t br_vlan_opts_nl_size(void); 1257 int br_vlan_process_options(const struct net_bridge *br, 1258 const struct net_bridge_port *p, 1259 struct net_bridge_vlan *range_start, 1260 struct net_bridge_vlan *range_end, 1261 struct nlattr **tb, 1262 struct netlink_ext_ack *extack); 1263 1264 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1265 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1266 { 1267 return READ_ONCE(v->state); 1268 } 1269 1270 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1271 { 1272 WRITE_ONCE(v->state, state); 1273 } 1274 1275 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1276 { 1277 return READ_ONCE(vg->pvid_state); 1278 } 1279 1280 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1281 u8 state) 1282 { 1283 WRITE_ONCE(vg->pvid_state, state); 1284 } 1285 1286 /* learn_allow is true at ingress and false at egress */ 1287 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1288 { 1289 switch (state) { 1290 case BR_STATE_LEARNING: 1291 return learn_allow; 1292 case BR_STATE_FORWARDING: 1293 return true; 1294 default: 1295 return false; 1296 } 1297 } 1298 #endif 1299 1300 struct nf_br_ops { 1301 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1302 }; 1303 extern const struct nf_br_ops __rcu *nf_br_ops; 1304 1305 /* br_netfilter.c */ 1306 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1307 int br_nf_core_init(void); 1308 void br_nf_core_fini(void); 1309 void br_netfilter_rtable_init(struct net_bridge *); 1310 #else 1311 static inline int br_nf_core_init(void) { return 0; } 1312 static inline void br_nf_core_fini(void) {} 1313 #define br_netfilter_rtable_init(x) 1314 #endif 1315 1316 /* br_stp.c */ 1317 void br_set_state(struct net_bridge_port *p, unsigned int state); 1318 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1319 void br_init_port(struct net_bridge_port *p); 1320 void br_become_designated_port(struct net_bridge_port *p); 1321 1322 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1323 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1324 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1325 int br_set_max_age(struct net_bridge *br, unsigned long x); 1326 int __set_ageing_time(struct net_device *dev, unsigned long t); 1327 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1328 1329 1330 /* br_stp_if.c */ 1331 void br_stp_enable_bridge(struct net_bridge *br); 1332 void br_stp_disable_bridge(struct net_bridge *br); 1333 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1334 struct netlink_ext_ack *extack); 1335 void br_stp_enable_port(struct net_bridge_port *p); 1336 void br_stp_disable_port(struct net_bridge_port *p); 1337 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1338 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1339 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1340 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1341 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1342 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1343 1344 /* br_stp_bpdu.c */ 1345 struct stp_proto; 1346 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1347 struct net_device *dev); 1348 1349 /* br_stp_timer.c */ 1350 void br_stp_timer_init(struct net_bridge *br); 1351 void br_stp_port_timer_init(struct net_bridge_port *p); 1352 unsigned long br_timer_value(const struct timer_list *timer); 1353 1354 /* br.c */ 1355 #if IS_ENABLED(CONFIG_ATM_LANE) 1356 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1357 #endif 1358 1359 /* br_mrp.c */ 1360 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1361 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1362 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1363 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); 1364 bool br_mrp_enabled(struct net_bridge *br); 1365 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1366 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1367 #else 1368 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1369 struct nlattr *attr, int cmd, 1370 struct netlink_ext_ack *extack) 1371 { 1372 return -EOPNOTSUPP; 1373 } 1374 1375 static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) 1376 { 1377 return 0; 1378 } 1379 1380 static inline bool br_mrp_enabled(struct net_bridge *br) 1381 { 1382 return false; 1383 } 1384 1385 static inline void br_mrp_port_del(struct net_bridge *br, 1386 struct net_bridge_port *p) 1387 { 1388 } 1389 1390 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1391 { 1392 return 0; 1393 } 1394 1395 #endif 1396 1397 /* br_netlink.c */ 1398 extern struct rtnl_link_ops br_link_ops; 1399 int br_netlink_init(void); 1400 void br_netlink_fini(void); 1401 void br_ifinfo_notify(int event, const struct net_bridge *br, 1402 const struct net_bridge_port *port); 1403 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1404 struct netlink_ext_ack *extack); 1405 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1406 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1407 u32 filter_mask, int nlflags); 1408 int br_process_vlan_info(struct net_bridge *br, 1409 struct net_bridge_port *p, int cmd, 1410 struct bridge_vlan_info *vinfo_curr, 1411 struct bridge_vlan_info **vinfo_last, 1412 bool *changed, 1413 struct netlink_ext_ack *extack); 1414 1415 #ifdef CONFIG_SYSFS 1416 /* br_sysfs_if.c */ 1417 extern const struct sysfs_ops brport_sysfs_ops; 1418 int br_sysfs_addif(struct net_bridge_port *p); 1419 int br_sysfs_renameif(struct net_bridge_port *p); 1420 1421 /* br_sysfs_br.c */ 1422 int br_sysfs_addbr(struct net_device *dev); 1423 void br_sysfs_delbr(struct net_device *dev); 1424 1425 #else 1426 1427 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1428 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1429 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1430 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1431 #endif /* CONFIG_SYSFS */ 1432 1433 /* br_switchdev.c */ 1434 #ifdef CONFIG_NET_SWITCHDEV 1435 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1436 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1437 struct sk_buff *skb); 1438 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1439 const struct sk_buff *skb); 1440 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1441 unsigned long flags, 1442 unsigned long mask); 1443 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1444 int type); 1445 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1446 struct netlink_ext_ack *extack); 1447 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1448 1449 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1450 { 1451 skb->offload_fwd_mark = 0; 1452 } 1453 #else 1454 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1455 { 1456 return 0; 1457 } 1458 1459 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1460 struct sk_buff *skb) 1461 { 1462 } 1463 1464 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1465 const struct sk_buff *skb) 1466 { 1467 return true; 1468 } 1469 1470 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1471 unsigned long flags, 1472 unsigned long mask) 1473 { 1474 return 0; 1475 } 1476 1477 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1478 u16 vid, u16 flags, 1479 struct netlink_ext_ack *extack) 1480 { 1481 return -EOPNOTSUPP; 1482 } 1483 1484 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1485 { 1486 return -EOPNOTSUPP; 1487 } 1488 1489 static inline void 1490 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1491 { 1492 } 1493 1494 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1495 { 1496 } 1497 #endif /* CONFIG_NET_SWITCHDEV */ 1498 1499 /* br_arp_nd_proxy.c */ 1500 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1501 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1502 u16 vid, struct net_bridge_port *p); 1503 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1504 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1505 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1506 #endif 1507