1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 struct br_vlan_stats { 93 u64 rx_bytes; 94 u64 rx_packets; 95 u64 tx_bytes; 96 u64 tx_packets; 97 struct u64_stats_sync syncp; 98 }; 99 100 struct br_tunnel_info { 101 __be64 tunnel_id; 102 struct metadata_dst *tunnel_dst; 103 }; 104 105 /* private vlan flags */ 106 enum { 107 BR_VLFLAG_PER_PORT_STATS = BIT(0), 108 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 109 }; 110 111 /** 112 * struct net_bridge_vlan - per-vlan entry 113 * 114 * @vnode: rhashtable member 115 * @vid: VLAN id 116 * @flags: bridge vlan flags 117 * @priv_flags: private (in-kernel) bridge vlan flags 118 * @state: STP state (e.g. blocking, learning, forwarding) 119 * @stats: per-cpu VLAN statistics 120 * @br: if MASTER flag set, this points to a bridge struct 121 * @port: if MASTER flag unset, this points to a port struct 122 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 123 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 124 * for this VLAN entry 125 * @vlist: sorted list of VLAN entries 126 * @rcu: used for entry destruction 127 * 128 * This structure is shared between the global per-VLAN entries contained in 129 * the bridge rhashtable and the local per-port per-VLAN entries contained in 130 * the port's rhashtable. The union entries should be interpreted depending on 131 * the entry flags that are set. 132 */ 133 struct net_bridge_vlan { 134 struct rhash_head vnode; 135 struct rhash_head tnode; 136 u16 vid; 137 u16 flags; 138 u16 priv_flags; 139 u8 state; 140 struct br_vlan_stats __percpu *stats; 141 union { 142 struct net_bridge *br; 143 struct net_bridge_port *port; 144 }; 145 union { 146 refcount_t refcnt; 147 struct net_bridge_vlan *brvlan; 148 }; 149 150 struct br_tunnel_info tinfo; 151 152 struct list_head vlist; 153 154 struct rcu_head rcu; 155 }; 156 157 /** 158 * struct net_bridge_vlan_group 159 * 160 * @vlan_hash: VLAN entry rhashtable 161 * @vlan_list: sorted VLAN entry list 162 * @num_vlans: number of total VLAN entries 163 * @pvid: PVID VLAN id 164 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 165 * 166 * IMPORTANT: Be careful when checking if there're VLAN entries using list 167 * primitives because the bridge can have entries in its list which 168 * are just for global context but not for filtering, i.e. they have 169 * the master flag set but not the brentry flag. If you have to check 170 * if there're "real" entries in the bridge please test @num_vlans 171 */ 172 struct net_bridge_vlan_group { 173 struct rhashtable vlan_hash; 174 struct rhashtable tunnel_hash; 175 struct list_head vlan_list; 176 u16 num_vlans; 177 u16 pvid; 178 u8 pvid_state; 179 }; 180 181 /* bridge fdb flags */ 182 enum { 183 BR_FDB_LOCAL, 184 BR_FDB_STATIC, 185 BR_FDB_STICKY, 186 BR_FDB_ADDED_BY_USER, 187 BR_FDB_ADDED_BY_EXT_LEARN, 188 BR_FDB_OFFLOADED, 189 BR_FDB_NOTIFY, 190 BR_FDB_NOTIFY_INACTIVE 191 }; 192 193 struct net_bridge_fdb_key { 194 mac_addr addr; 195 u16 vlan_id; 196 }; 197 198 struct net_bridge_fdb_entry { 199 struct rhash_head rhnode; 200 struct net_bridge_port *dst; 201 202 struct net_bridge_fdb_key key; 203 struct hlist_node fdb_node; 204 unsigned long flags; 205 206 /* write-heavy members should not affect lookups */ 207 unsigned long updated ____cacheline_aligned_in_smp; 208 unsigned long used; 209 210 struct rcu_head rcu; 211 }; 212 213 #define MDB_PG_FLAGS_PERMANENT BIT(0) 214 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 216 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 217 #define MDB_PG_FLAGS_BLOCKED BIT(4) 218 219 #define PG_SRC_ENT_LIMIT 32 220 221 #define BR_SGRP_F_DELETE BIT(0) 222 #define BR_SGRP_F_SEND BIT(1) 223 #define BR_SGRP_F_INSTALLED BIT(2) 224 225 struct net_bridge_mcast_gc { 226 struct hlist_node gc_node; 227 void (*destroy)(struct net_bridge_mcast_gc *gc); 228 }; 229 230 struct net_bridge_group_src { 231 struct hlist_node node; 232 233 struct br_ip addr; 234 struct net_bridge_port_group *pg; 235 u8 flags; 236 u8 src_query_rexmit_cnt; 237 struct timer_list timer; 238 239 struct net_bridge *br; 240 struct net_bridge_mcast_gc mcast_gc; 241 struct rcu_head rcu; 242 }; 243 244 struct net_bridge_port_group_sg_key { 245 struct net_bridge_port *port; 246 struct br_ip addr; 247 }; 248 249 struct net_bridge_port_group { 250 struct net_bridge_port_group __rcu *next; 251 struct net_bridge_port_group_sg_key key; 252 unsigned char eth_addr[ETH_ALEN] __aligned(2); 253 unsigned char flags; 254 unsigned char filter_mode; 255 unsigned char grp_query_rexmit_cnt; 256 unsigned char rt_protocol; 257 258 struct hlist_head src_list; 259 unsigned int src_ents; 260 struct timer_list timer; 261 struct timer_list rexmit_timer; 262 struct hlist_node mglist; 263 264 struct rhash_head rhnode; 265 struct net_bridge_mcast_gc mcast_gc; 266 struct rcu_head rcu; 267 }; 268 269 struct net_bridge_mdb_entry { 270 struct rhash_head rhnode; 271 struct net_bridge *br; 272 struct net_bridge_port_group __rcu *ports; 273 struct br_ip addr; 274 bool host_joined; 275 276 struct timer_list timer; 277 struct hlist_node mdb_node; 278 279 struct net_bridge_mcast_gc mcast_gc; 280 struct rcu_head rcu; 281 }; 282 283 struct net_bridge_port { 284 struct net_bridge *br; 285 struct net_device *dev; 286 struct list_head list; 287 288 unsigned long flags; 289 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 290 struct net_bridge_vlan_group __rcu *vlgrp; 291 #endif 292 struct net_bridge_port __rcu *backup_port; 293 294 /* STP */ 295 u8 priority; 296 u8 state; 297 u16 port_no; 298 unsigned char topology_change_ack; 299 unsigned char config_pending; 300 port_id port_id; 301 port_id designated_port; 302 bridge_id designated_root; 303 bridge_id designated_bridge; 304 u32 path_cost; 305 u32 designated_cost; 306 unsigned long designated_age; 307 308 struct timer_list forward_delay_timer; 309 struct timer_list hold_timer; 310 struct timer_list message_age_timer; 311 struct kobject kobj; 312 struct rcu_head rcu; 313 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 315 struct bridge_mcast_own_query ip4_own_query; 316 #if IS_ENABLED(CONFIG_IPV6) 317 struct bridge_mcast_own_query ip6_own_query; 318 #endif /* IS_ENABLED(CONFIG_IPV6) */ 319 unsigned char multicast_router; 320 struct bridge_mcast_stats __percpu *mcast_stats; 321 struct timer_list multicast_router_timer; 322 struct hlist_head mglist; 323 struct hlist_node rlist; 324 #endif 325 326 #ifdef CONFIG_SYSFS 327 char sysfs_name[IFNAMSIZ]; 328 #endif 329 330 #ifdef CONFIG_NET_POLL_CONTROLLER 331 struct netpoll *np; 332 #endif 333 #ifdef CONFIG_NET_SWITCHDEV 334 int offload_fwd_mark; 335 #endif 336 u16 group_fwd_mask; 337 u16 backup_redirected_cnt; 338 339 struct bridge_stp_xstats stp_xstats; 340 }; 341 342 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 343 344 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 345 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 346 347 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 348 { 349 return rcu_dereference(dev->rx_handler_data); 350 } 351 352 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 353 { 354 return netif_is_bridge_port(dev) ? 355 rtnl_dereference(dev->rx_handler_data) : NULL; 356 } 357 358 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 359 { 360 return netif_is_bridge_port(dev) ? 361 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 362 } 363 364 enum net_bridge_opts { 365 BROPT_VLAN_ENABLED, 366 BROPT_VLAN_STATS_ENABLED, 367 BROPT_NF_CALL_IPTABLES, 368 BROPT_NF_CALL_IP6TABLES, 369 BROPT_NF_CALL_ARPTABLES, 370 BROPT_GROUP_ADDR_SET, 371 BROPT_MULTICAST_ENABLED, 372 BROPT_MULTICAST_QUERIER, 373 BROPT_MULTICAST_QUERY_USE_IFADDR, 374 BROPT_MULTICAST_STATS_ENABLED, 375 BROPT_HAS_IPV6_ADDR, 376 BROPT_NEIGH_SUPPRESS_ENABLED, 377 BROPT_MTU_SET_BY_USER, 378 BROPT_VLAN_STATS_PER_PORT, 379 BROPT_NO_LL_LEARN, 380 BROPT_VLAN_BRIDGE_BINDING, 381 }; 382 383 struct net_bridge { 384 spinlock_t lock; 385 spinlock_t hash_lock; 386 struct hlist_head frame_type_list; 387 struct net_device *dev; 388 struct pcpu_sw_netstats __percpu *stats; 389 unsigned long options; 390 /* These fields are accessed on each packet */ 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 392 __be16 vlan_proto; 393 u16 default_pvid; 394 struct net_bridge_vlan_group __rcu *vlgrp; 395 #endif 396 397 struct rhashtable fdb_hash_tbl; 398 struct list_head port_list; 399 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 400 union { 401 struct rtable fake_rtable; 402 struct rt6_info fake_rt6_info; 403 }; 404 #endif 405 u16 group_fwd_mask; 406 u16 group_fwd_mask_required; 407 408 /* STP */ 409 bridge_id designated_root; 410 bridge_id bridge_id; 411 unsigned char topology_change; 412 unsigned char topology_change_detected; 413 u16 root_port; 414 unsigned long max_age; 415 unsigned long hello_time; 416 unsigned long forward_delay; 417 unsigned long ageing_time; 418 unsigned long bridge_max_age; 419 unsigned long bridge_hello_time; 420 unsigned long bridge_forward_delay; 421 unsigned long bridge_ageing_time; 422 u32 root_path_cost; 423 424 u8 group_addr[ETH_ALEN]; 425 426 enum { 427 BR_NO_STP, /* no spanning tree */ 428 BR_KERNEL_STP, /* old STP in kernel */ 429 BR_USER_STP, /* new RSTP in userspace */ 430 } stp_enabled; 431 432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 433 434 u32 hash_max; 435 436 u32 multicast_last_member_count; 437 u32 multicast_startup_query_count; 438 439 u8 multicast_igmp_version; 440 u8 multicast_router; 441 #if IS_ENABLED(CONFIG_IPV6) 442 u8 multicast_mld_version; 443 #endif 444 spinlock_t multicast_lock; 445 unsigned long multicast_last_member_interval; 446 unsigned long multicast_membership_interval; 447 unsigned long multicast_querier_interval; 448 unsigned long multicast_query_interval; 449 unsigned long multicast_query_response_interval; 450 unsigned long multicast_startup_query_interval; 451 452 struct rhashtable mdb_hash_tbl; 453 struct rhashtable sg_port_tbl; 454 455 struct hlist_head mcast_gc_list; 456 struct hlist_head mdb_list; 457 struct hlist_head router_list; 458 459 struct timer_list multicast_router_timer; 460 struct bridge_mcast_other_query ip4_other_query; 461 struct bridge_mcast_own_query ip4_own_query; 462 struct bridge_mcast_querier ip4_querier; 463 struct bridge_mcast_stats __percpu *mcast_stats; 464 #if IS_ENABLED(CONFIG_IPV6) 465 struct bridge_mcast_other_query ip6_other_query; 466 struct bridge_mcast_own_query ip6_own_query; 467 struct bridge_mcast_querier ip6_querier; 468 #endif /* IS_ENABLED(CONFIG_IPV6) */ 469 struct work_struct mcast_gc_work; 470 #endif 471 472 struct timer_list hello_timer; 473 struct timer_list tcn_timer; 474 struct timer_list topology_change_timer; 475 struct delayed_work gc_work; 476 struct kobject *ifobj; 477 u32 auto_cnt; 478 479 #ifdef CONFIG_NET_SWITCHDEV 480 int offload_fwd_mark; 481 #endif 482 struct hlist_head fdb_list; 483 484 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 485 struct list_head mrp_list; 486 #endif 487 }; 488 489 struct br_input_skb_cb { 490 struct net_device *brdev; 491 492 u16 frag_max_size; 493 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 494 u8 igmp; 495 u8 mrouters_only:1; 496 #endif 497 u8 proxyarp_replied:1; 498 u8 src_port_isolated:1; 499 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 500 u8 vlan_filtered:1; 501 #endif 502 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 503 u8 br_netfilter_broute:1; 504 #endif 505 506 #ifdef CONFIG_NET_SWITCHDEV 507 int offload_fwd_mark; 508 #endif 509 }; 510 511 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 512 513 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 514 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 515 #else 516 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 517 #endif 518 519 #define br_printk(level, br, format, args...) \ 520 printk(level "%s: " format, (br)->dev->name, ##args) 521 522 #define br_err(__br, format, args...) \ 523 br_printk(KERN_ERR, __br, format, ##args) 524 #define br_warn(__br, format, args...) \ 525 br_printk(KERN_WARNING, __br, format, ##args) 526 #define br_notice(__br, format, args...) \ 527 br_printk(KERN_NOTICE, __br, format, ##args) 528 #define br_info(__br, format, args...) \ 529 br_printk(KERN_INFO, __br, format, ##args) 530 531 #define br_debug(br, format, args...) \ 532 pr_debug("%s: " format, (br)->dev->name, ##args) 533 534 /* called under bridge lock */ 535 static inline int br_is_root_bridge(const struct net_bridge *br) 536 { 537 return !memcmp(&br->bridge_id, &br->designated_root, 8); 538 } 539 540 /* check if a VLAN entry is global */ 541 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 542 { 543 return v->flags & BRIDGE_VLAN_INFO_MASTER; 544 } 545 546 /* check if a VLAN entry is used by the bridge */ 547 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 548 { 549 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 550 } 551 552 /* check if we should use the vlan entry, returns false if it's only context */ 553 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 554 { 555 if (br_vlan_is_master(v)) { 556 if (br_vlan_is_brentry(v)) 557 return true; 558 else 559 return false; 560 } 561 562 return true; 563 } 564 565 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 566 { 567 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 568 } 569 570 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 571 { 572 bool ret = vid > 0 && vid < VLAN_VID_MASK; 573 574 if (!ret) 575 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 576 577 return ret; 578 } 579 580 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 581 const struct bridge_vlan_info *last, 582 struct netlink_ext_ack *extack) 583 { 584 /* pvid flag is not allowed in ranges */ 585 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 586 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 587 return false; 588 } 589 590 /* when cur is the range end, check if: 591 * - it has range start flag 592 * - range ids are invalid (end is equal to or before start) 593 */ 594 if (last) { 595 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 596 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 597 return false; 598 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 599 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 600 return false; 601 } else if (cur->vid <= last->vid) { 602 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 603 return false; 604 } 605 } 606 607 /* check for required range flags */ 608 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 609 BRIDGE_VLAN_INFO_RANGE_END))) { 610 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 611 return false; 612 } 613 614 return true; 615 } 616 617 static inline int br_afspec_cmd_to_rtm(int cmd) 618 { 619 switch (cmd) { 620 case RTM_SETLINK: 621 return RTM_NEWVLAN; 622 case RTM_DELLINK: 623 return RTM_DELVLAN; 624 } 625 626 return 0; 627 } 628 629 static inline int br_opt_get(const struct net_bridge *br, 630 enum net_bridge_opts opt) 631 { 632 return test_bit(opt, &br->options); 633 } 634 635 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 636 struct netlink_ext_ack *extack); 637 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 638 int br_boolopt_multi_toggle(struct net_bridge *br, 639 struct br_boolopt_multi *bm, 640 struct netlink_ext_ack *extack); 641 void br_boolopt_multi_get(const struct net_bridge *br, 642 struct br_boolopt_multi *bm); 643 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 644 645 /* br_device.c */ 646 void br_dev_setup(struct net_device *dev); 647 void br_dev_delete(struct net_device *dev, struct list_head *list); 648 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 649 #ifdef CONFIG_NET_POLL_CONTROLLER 650 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 651 struct sk_buff *skb) 652 { 653 netpoll_send_skb(p->np, skb); 654 } 655 656 int br_netpoll_enable(struct net_bridge_port *p); 657 void br_netpoll_disable(struct net_bridge_port *p); 658 #else 659 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 660 struct sk_buff *skb) 661 { 662 } 663 664 static inline int br_netpoll_enable(struct net_bridge_port *p) 665 { 666 return 0; 667 } 668 669 static inline void br_netpoll_disable(struct net_bridge_port *p) 670 { 671 } 672 #endif 673 674 /* br_fdb.c */ 675 int br_fdb_init(void); 676 void br_fdb_fini(void); 677 int br_fdb_hash_init(struct net_bridge *br); 678 void br_fdb_hash_fini(struct net_bridge *br); 679 void br_fdb_flush(struct net_bridge *br); 680 void br_fdb_find_delete_local(struct net_bridge *br, 681 const struct net_bridge_port *p, 682 const unsigned char *addr, u16 vid); 683 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 684 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 685 void br_fdb_cleanup(struct work_struct *work); 686 void br_fdb_delete_by_port(struct net_bridge *br, 687 const struct net_bridge_port *p, u16 vid, int do_all); 688 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 689 const unsigned char *addr, 690 __u16 vid); 691 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 692 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 693 unsigned long off); 694 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 695 const unsigned char *addr, u16 vid); 696 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 697 const unsigned char *addr, u16 vid, unsigned long flags); 698 699 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 700 struct net_device *dev, const unsigned char *addr, u16 vid); 701 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 702 const unsigned char *addr, u16 vid, u16 nlh_flags, 703 struct netlink_ext_ack *extack); 704 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 705 struct net_device *dev, struct net_device *fdev, int *idx); 706 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 707 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 708 struct netlink_ext_ack *extack); 709 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 710 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 711 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 712 const unsigned char *addr, u16 vid, 713 bool swdev_notify); 714 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 715 const unsigned char *addr, u16 vid, 716 bool swdev_notify); 717 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 718 const unsigned char *addr, u16 vid, bool offloaded); 719 720 /* br_forward.c */ 721 enum br_pkt_type { 722 BR_PKT_UNICAST, 723 BR_PKT_MULTICAST, 724 BR_PKT_BROADCAST 725 }; 726 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 727 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 728 bool local_rcv, bool local_orig); 729 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 730 void br_flood(struct net_bridge *br, struct sk_buff *skb, 731 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 732 733 /* return true if both source port and dest port are isolated */ 734 static inline bool br_skb_isolated(const struct net_bridge_port *to, 735 const struct sk_buff *skb) 736 { 737 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 738 (to->flags & BR_ISOLATED); 739 } 740 741 /* br_if.c */ 742 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 743 int br_add_bridge(struct net *net, const char *name); 744 int br_del_bridge(struct net *net, const char *name); 745 int br_add_if(struct net_bridge *br, struct net_device *dev, 746 struct netlink_ext_ack *extack); 747 int br_del_if(struct net_bridge *br, struct net_device *dev); 748 void br_mtu_auto_adjust(struct net_bridge *br); 749 netdev_features_t br_features_recompute(struct net_bridge *br, 750 netdev_features_t features); 751 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 752 void br_manage_promisc(struct net_bridge *br); 753 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 754 755 /* br_input.c */ 756 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 757 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 758 759 struct br_frame_type { 760 __be16 type; 761 int (*frame_handler)(struct net_bridge_port *port, 762 struct sk_buff *skb); 763 struct hlist_node list; 764 }; 765 766 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 767 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 768 769 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 770 { 771 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 772 } 773 774 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 775 { 776 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 777 } 778 779 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 780 { 781 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 782 } 783 784 static inline struct net_bridge_port * 785 br_port_get_check_rtnl(const struct net_device *dev) 786 { 787 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 788 } 789 790 /* br_ioctl.c */ 791 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 792 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 793 void __user *arg); 794 795 /* br_multicast.c */ 796 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 797 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 798 struct sk_buff *skb, u16 vid); 799 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 800 struct sk_buff *skb, u16 vid); 801 int br_multicast_add_port(struct net_bridge_port *port); 802 void br_multicast_del_port(struct net_bridge_port *port); 803 void br_multicast_enable_port(struct net_bridge_port *port); 804 void br_multicast_disable_port(struct net_bridge_port *port); 805 void br_multicast_init(struct net_bridge *br); 806 void br_multicast_open(struct net_bridge *br); 807 void br_multicast_stop(struct net_bridge *br); 808 void br_multicast_dev_del(struct net_bridge *br); 809 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 810 struct sk_buff *skb, bool local_rcv, bool local_orig); 811 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 812 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 813 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 814 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 815 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 816 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 817 #if IS_ENABLED(CONFIG_IPV6) 818 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 819 #endif 820 struct net_bridge_mdb_entry * 821 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 822 struct net_bridge_mdb_entry * 823 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 824 struct net_bridge_port_group * 825 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 826 struct net_bridge_port_group __rcu *next, 827 unsigned char flags, const unsigned char *src, 828 u8 filter_mode, u8 rt_protocol); 829 int br_mdb_hash_init(struct net_bridge *br); 830 void br_mdb_hash_fini(struct net_bridge *br); 831 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 832 struct net_bridge_port_group *pg, int type); 833 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 834 int type); 835 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 836 struct net_bridge_port_group *pg, 837 struct net_bridge_port_group __rcu **pp); 838 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 839 const struct sk_buff *skb, u8 type, u8 dir); 840 int br_multicast_init_stats(struct net_bridge *br); 841 void br_multicast_uninit_stats(struct net_bridge *br); 842 void br_multicast_get_stats(const struct net_bridge *br, 843 const struct net_bridge_port *p, 844 struct br_mcast_stats *dest); 845 void br_mdb_init(void); 846 void br_mdb_uninit(void); 847 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 848 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 849 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 850 u8 filter_mode); 851 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 852 struct net_bridge_port_group *sg); 853 854 #define mlock_dereference(X, br) \ 855 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 856 857 static inline bool br_multicast_is_router(struct net_bridge *br) 858 { 859 return br->multicast_router == 2 || 860 (br->multicast_router == 1 && 861 timer_pending(&br->multicast_router_timer)); 862 } 863 864 static inline bool 865 __br_multicast_querier_exists(struct net_bridge *br, 866 struct bridge_mcast_other_query *querier, 867 const bool is_ipv6) 868 { 869 bool own_querier_enabled; 870 871 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 872 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 873 own_querier_enabled = false; 874 else 875 own_querier_enabled = true; 876 } else { 877 own_querier_enabled = false; 878 } 879 880 return time_is_before_jiffies(querier->delay_time) && 881 (own_querier_enabled || timer_pending(&querier->timer)); 882 } 883 884 static inline bool br_multicast_querier_exists(struct net_bridge *br, 885 struct ethhdr *eth) 886 { 887 switch (eth->h_proto) { 888 case (htons(ETH_P_IP)): 889 return __br_multicast_querier_exists(br, 890 &br->ip4_other_query, false); 891 #if IS_ENABLED(CONFIG_IPV6) 892 case (htons(ETH_P_IPV6)): 893 return __br_multicast_querier_exists(br, 894 &br->ip6_other_query, true); 895 #endif 896 default: 897 return false; 898 } 899 } 900 901 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 902 { 903 switch (ip->proto) { 904 case htons(ETH_P_IP): 905 return ipv4_is_zeronet(ip->src.ip4); 906 #if IS_ENABLED(CONFIG_IPV6) 907 case htons(ETH_P_IPV6): 908 return ipv6_addr_any(&ip->src.ip6); 909 #endif 910 default: 911 return false; 912 } 913 } 914 915 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 916 __be16 proto) 917 { 918 switch (proto) { 919 case htons(ETH_P_IP): 920 return !!(br->multicast_igmp_version == 3); 921 #if IS_ENABLED(CONFIG_IPV6) 922 case htons(ETH_P_IPV6): 923 return !!(br->multicast_mld_version == 2); 924 #endif 925 default: 926 return false; 927 } 928 } 929 930 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 931 { 932 return BR_INPUT_SKB_CB(skb)->igmp; 933 } 934 935 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 936 { 937 return br->multicast_last_member_interval * 938 br->multicast_last_member_count; 939 } 940 941 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 942 { 943 /* use the RFC default of 2 for QRV */ 944 return 2 * br->multicast_query_interval + 945 br->multicast_query_response_interval; 946 } 947 #else 948 static inline int br_multicast_rcv(struct net_bridge *br, 949 struct net_bridge_port *port, 950 struct sk_buff *skb, 951 u16 vid) 952 { 953 return 0; 954 } 955 956 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 957 struct sk_buff *skb, u16 vid) 958 { 959 return NULL; 960 } 961 962 static inline int br_multicast_add_port(struct net_bridge_port *port) 963 { 964 return 0; 965 } 966 967 static inline void br_multicast_del_port(struct net_bridge_port *port) 968 { 969 } 970 971 static inline void br_multicast_enable_port(struct net_bridge_port *port) 972 { 973 } 974 975 static inline void br_multicast_disable_port(struct net_bridge_port *port) 976 { 977 } 978 979 static inline void br_multicast_init(struct net_bridge *br) 980 { 981 } 982 983 static inline void br_multicast_open(struct net_bridge *br) 984 { 985 } 986 987 static inline void br_multicast_stop(struct net_bridge *br) 988 { 989 } 990 991 static inline void br_multicast_dev_del(struct net_bridge *br) 992 { 993 } 994 995 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 996 struct sk_buff *skb, 997 bool local_rcv, bool local_orig) 998 { 999 } 1000 1001 static inline bool br_multicast_is_router(struct net_bridge *br) 1002 { 1003 return false; 1004 } 1005 1006 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1007 struct ethhdr *eth) 1008 { 1009 return false; 1010 } 1011 1012 static inline void br_mdb_init(void) 1013 { 1014 } 1015 1016 static inline void br_mdb_uninit(void) 1017 { 1018 } 1019 1020 static inline int br_mdb_hash_init(struct net_bridge *br) 1021 { 1022 return 0; 1023 } 1024 1025 static inline void br_mdb_hash_fini(struct net_bridge *br) 1026 { 1027 } 1028 1029 static inline void br_multicast_count(struct net_bridge *br, 1030 const struct net_bridge_port *p, 1031 const struct sk_buff *skb, 1032 u8 type, u8 dir) 1033 { 1034 } 1035 1036 static inline int br_multicast_init_stats(struct net_bridge *br) 1037 { 1038 return 0; 1039 } 1040 1041 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1042 { 1043 } 1044 1045 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1046 { 1047 return 0; 1048 } 1049 #endif 1050 1051 /* br_vlan.c */ 1052 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1053 bool br_allowed_ingress(const struct net_bridge *br, 1054 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1055 u16 *vid, u8 *state); 1056 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1057 const struct sk_buff *skb); 1058 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1059 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1060 const struct net_bridge_port *port, 1061 struct net_bridge_vlan_group *vg, 1062 struct sk_buff *skb); 1063 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1064 bool *changed, struct netlink_ext_ack *extack); 1065 int br_vlan_delete(struct net_bridge *br, u16 vid); 1066 void br_vlan_flush(struct net_bridge *br); 1067 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1068 void br_recalculate_fwd_mask(struct net_bridge *br); 1069 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1070 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1071 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1072 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1073 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1074 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1075 int br_vlan_init(struct net_bridge *br); 1076 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1077 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1078 struct netlink_ext_ack *extack); 1079 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1080 bool *changed, struct netlink_ext_ack *extack); 1081 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1082 void nbp_vlan_flush(struct net_bridge_port *port); 1083 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1084 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1085 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1086 struct br_vlan_stats *stats); 1087 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1088 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1089 void *ptr); 1090 void br_vlan_rtnl_init(void); 1091 void br_vlan_rtnl_uninit(void); 1092 void br_vlan_notify(const struct net_bridge *br, 1093 const struct net_bridge_port *p, 1094 u16 vid, u16 vid_range, 1095 int cmd); 1096 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1097 const struct net_bridge_vlan *range_end); 1098 1099 static inline struct net_bridge_vlan_group *br_vlan_group( 1100 const struct net_bridge *br) 1101 { 1102 return rtnl_dereference(br->vlgrp); 1103 } 1104 1105 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1106 const struct net_bridge_port *p) 1107 { 1108 return rtnl_dereference(p->vlgrp); 1109 } 1110 1111 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1112 const struct net_bridge *br) 1113 { 1114 return rcu_dereference(br->vlgrp); 1115 } 1116 1117 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1118 const struct net_bridge_port *p) 1119 { 1120 return rcu_dereference(p->vlgrp); 1121 } 1122 1123 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1124 * skb, the vlan tag will always be present if the frame was tagged. 1125 */ 1126 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1127 { 1128 int err = 0; 1129 1130 if (skb_vlan_tag_present(skb)) { 1131 *vid = skb_vlan_tag_get_id(skb); 1132 } else { 1133 *vid = 0; 1134 err = -EINVAL; 1135 } 1136 1137 return err; 1138 } 1139 1140 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1141 { 1142 if (!vg) 1143 return 0; 1144 1145 smp_rmb(); 1146 return vg->pvid; 1147 } 1148 1149 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1150 { 1151 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1152 } 1153 #else 1154 static inline bool br_allowed_ingress(const struct net_bridge *br, 1155 struct net_bridge_vlan_group *vg, 1156 struct sk_buff *skb, 1157 u16 *vid, u8 *state) 1158 { 1159 return true; 1160 } 1161 1162 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1163 const struct sk_buff *skb) 1164 { 1165 return true; 1166 } 1167 1168 static inline bool br_should_learn(struct net_bridge_port *p, 1169 struct sk_buff *skb, u16 *vid) 1170 { 1171 return true; 1172 } 1173 1174 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1175 const struct net_bridge_port *port, 1176 struct net_bridge_vlan_group *vg, 1177 struct sk_buff *skb) 1178 { 1179 return skb; 1180 } 1181 1182 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1183 bool *changed, struct netlink_ext_ack *extack) 1184 { 1185 *changed = false; 1186 return -EOPNOTSUPP; 1187 } 1188 1189 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1190 { 1191 return -EOPNOTSUPP; 1192 } 1193 1194 static inline void br_vlan_flush(struct net_bridge *br) 1195 { 1196 } 1197 1198 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1199 { 1200 } 1201 1202 static inline int br_vlan_init(struct net_bridge *br) 1203 { 1204 return 0; 1205 } 1206 1207 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1208 bool *changed, struct netlink_ext_ack *extack) 1209 { 1210 *changed = false; 1211 return -EOPNOTSUPP; 1212 } 1213 1214 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1215 { 1216 return -EOPNOTSUPP; 1217 } 1218 1219 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1220 { 1221 } 1222 1223 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1224 u16 vid) 1225 { 1226 return NULL; 1227 } 1228 1229 static inline int nbp_vlan_init(struct net_bridge_port *port, 1230 struct netlink_ext_ack *extack) 1231 { 1232 return 0; 1233 } 1234 1235 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1236 { 1237 return 0; 1238 } 1239 1240 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1241 { 1242 return 0; 1243 } 1244 1245 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1246 unsigned long val) 1247 { 1248 return -EOPNOTSUPP; 1249 } 1250 1251 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1252 u32 filter_mask) 1253 { 1254 return 0; 1255 } 1256 1257 static inline struct net_bridge_vlan_group *br_vlan_group( 1258 const struct net_bridge *br) 1259 { 1260 return NULL; 1261 } 1262 1263 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1264 const struct net_bridge_port *p) 1265 { 1266 return NULL; 1267 } 1268 1269 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1270 const struct net_bridge *br) 1271 { 1272 return NULL; 1273 } 1274 1275 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1276 const struct net_bridge_port *p) 1277 { 1278 return NULL; 1279 } 1280 1281 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1282 struct br_vlan_stats *stats) 1283 { 1284 } 1285 1286 static inline void br_vlan_port_event(struct net_bridge_port *p, 1287 unsigned long event) 1288 { 1289 } 1290 1291 static inline int br_vlan_bridge_event(struct net_device *dev, 1292 unsigned long event, void *ptr) 1293 { 1294 return 0; 1295 } 1296 1297 static inline void br_vlan_rtnl_init(void) 1298 { 1299 } 1300 1301 static inline void br_vlan_rtnl_uninit(void) 1302 { 1303 } 1304 1305 static inline void br_vlan_notify(const struct net_bridge *br, 1306 const struct net_bridge_port *p, 1307 u16 vid, u16 vid_range, 1308 int cmd) 1309 { 1310 } 1311 1312 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1313 const struct net_bridge_vlan *range_end) 1314 { 1315 return true; 1316 } 1317 #endif 1318 1319 /* br_vlan_options.c */ 1320 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1321 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1322 const struct net_bridge_vlan *range_end); 1323 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1324 size_t br_vlan_opts_nl_size(void); 1325 int br_vlan_process_options(const struct net_bridge *br, 1326 const struct net_bridge_port *p, 1327 struct net_bridge_vlan *range_start, 1328 struct net_bridge_vlan *range_end, 1329 struct nlattr **tb, 1330 struct netlink_ext_ack *extack); 1331 1332 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1333 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1334 { 1335 return READ_ONCE(v->state); 1336 } 1337 1338 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1339 { 1340 WRITE_ONCE(v->state, state); 1341 } 1342 1343 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1344 { 1345 return READ_ONCE(vg->pvid_state); 1346 } 1347 1348 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1349 u8 state) 1350 { 1351 WRITE_ONCE(vg->pvid_state, state); 1352 } 1353 1354 /* learn_allow is true at ingress and false at egress */ 1355 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1356 { 1357 switch (state) { 1358 case BR_STATE_LEARNING: 1359 return learn_allow; 1360 case BR_STATE_FORWARDING: 1361 return true; 1362 default: 1363 return false; 1364 } 1365 } 1366 #endif 1367 1368 struct nf_br_ops { 1369 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1370 }; 1371 extern const struct nf_br_ops __rcu *nf_br_ops; 1372 1373 /* br_netfilter.c */ 1374 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1375 int br_nf_core_init(void); 1376 void br_nf_core_fini(void); 1377 void br_netfilter_rtable_init(struct net_bridge *); 1378 #else 1379 static inline int br_nf_core_init(void) { return 0; } 1380 static inline void br_nf_core_fini(void) {} 1381 #define br_netfilter_rtable_init(x) 1382 #endif 1383 1384 /* br_stp.c */ 1385 void br_set_state(struct net_bridge_port *p, unsigned int state); 1386 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1387 void br_init_port(struct net_bridge_port *p); 1388 void br_become_designated_port(struct net_bridge_port *p); 1389 1390 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1391 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1392 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1393 int br_set_max_age(struct net_bridge *br, unsigned long x); 1394 int __set_ageing_time(struct net_device *dev, unsigned long t); 1395 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1396 1397 1398 /* br_stp_if.c */ 1399 void br_stp_enable_bridge(struct net_bridge *br); 1400 void br_stp_disable_bridge(struct net_bridge *br); 1401 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1402 struct netlink_ext_ack *extack); 1403 void br_stp_enable_port(struct net_bridge_port *p); 1404 void br_stp_disable_port(struct net_bridge_port *p); 1405 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1406 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1407 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1408 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1409 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1410 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1411 1412 /* br_stp_bpdu.c */ 1413 struct stp_proto; 1414 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1415 struct net_device *dev); 1416 1417 /* br_stp_timer.c */ 1418 void br_stp_timer_init(struct net_bridge *br); 1419 void br_stp_port_timer_init(struct net_bridge_port *p); 1420 unsigned long br_timer_value(const struct timer_list *timer); 1421 1422 /* br.c */ 1423 #if IS_ENABLED(CONFIG_ATM_LANE) 1424 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1425 #endif 1426 1427 /* br_mrp.c */ 1428 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1429 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1430 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1431 bool br_mrp_enabled(struct net_bridge *br); 1432 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1433 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1434 #else 1435 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1436 struct nlattr *attr, int cmd, 1437 struct netlink_ext_ack *extack) 1438 { 1439 return -EOPNOTSUPP; 1440 } 1441 1442 static inline bool br_mrp_enabled(struct net_bridge *br) 1443 { 1444 return false; 1445 } 1446 1447 static inline void br_mrp_port_del(struct net_bridge *br, 1448 struct net_bridge_port *p) 1449 { 1450 } 1451 1452 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1453 { 1454 return 0; 1455 } 1456 1457 #endif 1458 1459 /* br_netlink.c */ 1460 extern struct rtnl_link_ops br_link_ops; 1461 int br_netlink_init(void); 1462 void br_netlink_fini(void); 1463 void br_ifinfo_notify(int event, const struct net_bridge *br, 1464 const struct net_bridge_port *port); 1465 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1466 struct netlink_ext_ack *extack); 1467 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1468 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1469 u32 filter_mask, int nlflags); 1470 int br_process_vlan_info(struct net_bridge *br, 1471 struct net_bridge_port *p, int cmd, 1472 struct bridge_vlan_info *vinfo_curr, 1473 struct bridge_vlan_info **vinfo_last, 1474 bool *changed, 1475 struct netlink_ext_ack *extack); 1476 1477 #ifdef CONFIG_SYSFS 1478 /* br_sysfs_if.c */ 1479 extern const struct sysfs_ops brport_sysfs_ops; 1480 int br_sysfs_addif(struct net_bridge_port *p); 1481 int br_sysfs_renameif(struct net_bridge_port *p); 1482 1483 /* br_sysfs_br.c */ 1484 int br_sysfs_addbr(struct net_device *dev); 1485 void br_sysfs_delbr(struct net_device *dev); 1486 1487 #else 1488 1489 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1490 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1491 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1492 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1493 #endif /* CONFIG_SYSFS */ 1494 1495 /* br_switchdev.c */ 1496 #ifdef CONFIG_NET_SWITCHDEV 1497 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1498 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1499 struct sk_buff *skb); 1500 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1501 const struct sk_buff *skb); 1502 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1503 unsigned long flags, 1504 unsigned long mask); 1505 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1506 int type); 1507 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1508 struct netlink_ext_ack *extack); 1509 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1510 1511 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1512 { 1513 skb->offload_fwd_mark = 0; 1514 } 1515 #else 1516 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1517 { 1518 return 0; 1519 } 1520 1521 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1522 struct sk_buff *skb) 1523 { 1524 } 1525 1526 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1527 const struct sk_buff *skb) 1528 { 1529 return true; 1530 } 1531 1532 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1533 unsigned long flags, 1534 unsigned long mask) 1535 { 1536 return 0; 1537 } 1538 1539 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1540 u16 vid, u16 flags, 1541 struct netlink_ext_ack *extack) 1542 { 1543 return -EOPNOTSUPP; 1544 } 1545 1546 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1547 { 1548 return -EOPNOTSUPP; 1549 } 1550 1551 static inline void 1552 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1553 { 1554 } 1555 1556 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1557 { 1558 } 1559 #endif /* CONFIG_NET_SWITCHDEV */ 1560 1561 /* br_arp_nd_proxy.c */ 1562 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1563 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1564 u16 vid, struct net_bridge_port *p); 1565 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1566 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1567 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1568 #endif 1569