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_tunnel_info { 93 __be64 tunnel_id; 94 struct metadata_dst *tunnel_dst; 95 }; 96 97 /* private vlan flags */ 98 enum { 99 BR_VLFLAG_PER_PORT_STATS = BIT(0), 100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 101 }; 102 103 /** 104 * struct net_bridge_vlan - per-vlan entry 105 * 106 * @vnode: rhashtable member 107 * @vid: VLAN id 108 * @flags: bridge vlan flags 109 * @priv_flags: private (in-kernel) bridge vlan flags 110 * @state: STP state (e.g. blocking, learning, forwarding) 111 * @stats: per-cpu VLAN statistics 112 * @br: if MASTER flag set, this points to a bridge struct 113 * @port: if MASTER flag unset, this points to a port struct 114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 116 * for this VLAN entry 117 * @vlist: sorted list of VLAN entries 118 * @rcu: used for entry destruction 119 * 120 * This structure is shared between the global per-VLAN entries contained in 121 * the bridge rhashtable and the local per-port per-VLAN entries contained in 122 * the port's rhashtable. The union entries should be interpreted depending on 123 * the entry flags that are set. 124 */ 125 struct net_bridge_vlan { 126 struct rhash_head vnode; 127 struct rhash_head tnode; 128 u16 vid; 129 u16 flags; 130 u16 priv_flags; 131 u8 state; 132 struct pcpu_sw_netstats __percpu *stats; 133 union { 134 struct net_bridge *br; 135 struct net_bridge_port *port; 136 }; 137 union { 138 refcount_t refcnt; 139 struct net_bridge_vlan *brvlan; 140 }; 141 142 struct br_tunnel_info tinfo; 143 144 struct list_head vlist; 145 146 struct rcu_head rcu; 147 }; 148 149 /** 150 * struct net_bridge_vlan_group 151 * 152 * @vlan_hash: VLAN entry rhashtable 153 * @vlan_list: sorted VLAN entry list 154 * @num_vlans: number of total VLAN entries 155 * @pvid: PVID VLAN id 156 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 157 * 158 * IMPORTANT: Be careful when checking if there're VLAN entries using list 159 * primitives because the bridge can have entries in its list which 160 * are just for global context but not for filtering, i.e. they have 161 * the master flag set but not the brentry flag. If you have to check 162 * if there're "real" entries in the bridge please test @num_vlans 163 */ 164 struct net_bridge_vlan_group { 165 struct rhashtable vlan_hash; 166 struct rhashtable tunnel_hash; 167 struct list_head vlan_list; 168 u16 num_vlans; 169 u16 pvid; 170 u8 pvid_state; 171 }; 172 173 /* bridge fdb flags */ 174 enum { 175 BR_FDB_LOCAL, 176 BR_FDB_STATIC, 177 BR_FDB_STICKY, 178 BR_FDB_ADDED_BY_USER, 179 BR_FDB_ADDED_BY_EXT_LEARN, 180 BR_FDB_OFFLOADED, 181 BR_FDB_NOTIFY, 182 BR_FDB_NOTIFY_INACTIVE 183 }; 184 185 struct net_bridge_fdb_key { 186 mac_addr addr; 187 u16 vlan_id; 188 }; 189 190 struct net_bridge_fdb_entry { 191 struct rhash_head rhnode; 192 struct net_bridge_port *dst; 193 194 struct net_bridge_fdb_key key; 195 struct hlist_node fdb_node; 196 unsigned long flags; 197 198 /* write-heavy members should not affect lookups */ 199 unsigned long updated ____cacheline_aligned_in_smp; 200 unsigned long used; 201 202 struct rcu_head rcu; 203 }; 204 205 #define MDB_PG_FLAGS_PERMANENT BIT(0) 206 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 208 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 209 #define MDB_PG_FLAGS_BLOCKED BIT(4) 210 211 #define PG_SRC_ENT_LIMIT 32 212 213 #define BR_SGRP_F_DELETE BIT(0) 214 #define BR_SGRP_F_SEND BIT(1) 215 #define BR_SGRP_F_INSTALLED BIT(2) 216 217 struct net_bridge_mcast_gc { 218 struct hlist_node gc_node; 219 void (*destroy)(struct net_bridge_mcast_gc *gc); 220 }; 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 net_bridge_mcast_gc mcast_gc; 233 struct rcu_head rcu; 234 }; 235 236 struct net_bridge_port_group_sg_key { 237 struct net_bridge_port *port; 238 struct br_ip addr; 239 }; 240 241 struct net_bridge_port_group { 242 struct net_bridge_port_group __rcu *next; 243 struct net_bridge_port_group_sg_key key; 244 unsigned char eth_addr[ETH_ALEN] __aligned(2); 245 unsigned char flags; 246 unsigned char filter_mode; 247 unsigned char grp_query_rexmit_cnt; 248 unsigned char rt_protocol; 249 250 struct hlist_head src_list; 251 unsigned int src_ents; 252 struct timer_list timer; 253 struct timer_list rexmit_timer; 254 struct hlist_node mglist; 255 256 struct rhash_head rhnode; 257 struct net_bridge_mcast_gc mcast_gc; 258 struct rcu_head rcu; 259 }; 260 261 struct net_bridge_mdb_entry { 262 struct rhash_head rhnode; 263 struct net_bridge *br; 264 struct net_bridge_port_group __rcu *ports; 265 struct br_ip addr; 266 bool host_joined; 267 268 struct timer_list timer; 269 struct hlist_node mdb_node; 270 271 struct net_bridge_mcast_gc mcast_gc; 272 struct rcu_head rcu; 273 }; 274 275 struct net_bridge_port { 276 struct net_bridge *br; 277 struct net_device *dev; 278 struct list_head list; 279 280 unsigned long flags; 281 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 282 struct net_bridge_vlan_group __rcu *vlgrp; 283 #endif 284 struct net_bridge_port __rcu *backup_port; 285 286 /* STP */ 287 u8 priority; 288 u8 state; 289 u16 port_no; 290 unsigned char topology_change_ack; 291 unsigned char config_pending; 292 port_id port_id; 293 port_id designated_port; 294 bridge_id designated_root; 295 bridge_id designated_bridge; 296 u32 path_cost; 297 u32 designated_cost; 298 unsigned long designated_age; 299 300 struct timer_list forward_delay_timer; 301 struct timer_list hold_timer; 302 struct timer_list message_age_timer; 303 struct kobject kobj; 304 struct rcu_head rcu; 305 306 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 307 struct bridge_mcast_own_query ip4_own_query; 308 #if IS_ENABLED(CONFIG_IPV6) 309 struct bridge_mcast_own_query ip6_own_query; 310 #endif /* IS_ENABLED(CONFIG_IPV6) */ 311 unsigned char multicast_router; 312 struct bridge_mcast_stats __percpu *mcast_stats; 313 struct timer_list multicast_router_timer; 314 struct hlist_head mglist; 315 struct hlist_node rlist; 316 #endif 317 318 #ifdef CONFIG_SYSFS 319 char sysfs_name[IFNAMSIZ]; 320 #endif 321 322 #ifdef CONFIG_NET_POLL_CONTROLLER 323 struct netpoll *np; 324 #endif 325 #ifdef CONFIG_NET_SWITCHDEV 326 int offload_fwd_mark; 327 #endif 328 u16 group_fwd_mask; 329 u16 backup_redirected_cnt; 330 331 struct bridge_stp_xstats stp_xstats; 332 }; 333 334 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 335 336 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 337 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 338 339 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 340 { 341 return rcu_dereference(dev->rx_handler_data); 342 } 343 344 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 345 { 346 return netif_is_bridge_port(dev) ? 347 rtnl_dereference(dev->rx_handler_data) : NULL; 348 } 349 350 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 351 { 352 return netif_is_bridge_port(dev) ? 353 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 354 } 355 356 enum net_bridge_opts { 357 BROPT_VLAN_ENABLED, 358 BROPT_VLAN_STATS_ENABLED, 359 BROPT_NF_CALL_IPTABLES, 360 BROPT_NF_CALL_IP6TABLES, 361 BROPT_NF_CALL_ARPTABLES, 362 BROPT_GROUP_ADDR_SET, 363 BROPT_MULTICAST_ENABLED, 364 BROPT_MULTICAST_QUERIER, 365 BROPT_MULTICAST_QUERY_USE_IFADDR, 366 BROPT_MULTICAST_STATS_ENABLED, 367 BROPT_HAS_IPV6_ADDR, 368 BROPT_NEIGH_SUPPRESS_ENABLED, 369 BROPT_MTU_SET_BY_USER, 370 BROPT_VLAN_STATS_PER_PORT, 371 BROPT_NO_LL_LEARN, 372 BROPT_VLAN_BRIDGE_BINDING, 373 }; 374 375 struct net_bridge { 376 spinlock_t lock; 377 spinlock_t hash_lock; 378 struct hlist_head frame_type_list; 379 struct net_device *dev; 380 unsigned long options; 381 /* These fields are accessed on each packet */ 382 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 383 __be16 vlan_proto; 384 u16 default_pvid; 385 struct net_bridge_vlan_group __rcu *vlgrp; 386 #endif 387 388 struct rhashtable fdb_hash_tbl; 389 struct list_head port_list; 390 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 391 union { 392 struct rtable fake_rtable; 393 struct rt6_info fake_rt6_info; 394 }; 395 #endif 396 u16 group_fwd_mask; 397 u16 group_fwd_mask_required; 398 399 /* STP */ 400 bridge_id designated_root; 401 bridge_id bridge_id; 402 unsigned char topology_change; 403 unsigned char topology_change_detected; 404 u16 root_port; 405 unsigned long max_age; 406 unsigned long hello_time; 407 unsigned long forward_delay; 408 unsigned long ageing_time; 409 unsigned long bridge_max_age; 410 unsigned long bridge_hello_time; 411 unsigned long bridge_forward_delay; 412 unsigned long bridge_ageing_time; 413 u32 root_path_cost; 414 415 u8 group_addr[ETH_ALEN]; 416 417 enum { 418 BR_NO_STP, /* no spanning tree */ 419 BR_KERNEL_STP, /* old STP in kernel */ 420 BR_USER_STP, /* new RSTP in userspace */ 421 } stp_enabled; 422 423 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 424 425 u32 hash_max; 426 427 u32 multicast_last_member_count; 428 u32 multicast_startup_query_count; 429 430 u8 multicast_igmp_version; 431 u8 multicast_router; 432 #if IS_ENABLED(CONFIG_IPV6) 433 u8 multicast_mld_version; 434 #endif 435 spinlock_t multicast_lock; 436 unsigned long multicast_last_member_interval; 437 unsigned long multicast_membership_interval; 438 unsigned long multicast_querier_interval; 439 unsigned long multicast_query_interval; 440 unsigned long multicast_query_response_interval; 441 unsigned long multicast_startup_query_interval; 442 443 struct rhashtable mdb_hash_tbl; 444 struct rhashtable sg_port_tbl; 445 446 struct hlist_head mcast_gc_list; 447 struct hlist_head mdb_list; 448 struct hlist_head router_list; 449 450 struct timer_list multicast_router_timer; 451 struct bridge_mcast_other_query ip4_other_query; 452 struct bridge_mcast_own_query ip4_own_query; 453 struct bridge_mcast_querier ip4_querier; 454 struct bridge_mcast_stats __percpu *mcast_stats; 455 #if IS_ENABLED(CONFIG_IPV6) 456 struct bridge_mcast_other_query ip6_other_query; 457 struct bridge_mcast_own_query ip6_own_query; 458 struct bridge_mcast_querier ip6_querier; 459 #endif /* IS_ENABLED(CONFIG_IPV6) */ 460 struct work_struct mcast_gc_work; 461 #endif 462 463 struct timer_list hello_timer; 464 struct timer_list tcn_timer; 465 struct timer_list topology_change_timer; 466 struct delayed_work gc_work; 467 struct kobject *ifobj; 468 u32 auto_cnt; 469 470 #ifdef CONFIG_NET_SWITCHDEV 471 int offload_fwd_mark; 472 #endif 473 struct hlist_head fdb_list; 474 475 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 476 struct hlist_head mrp_list; 477 #endif 478 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 479 struct hlist_head mep_list; 480 #endif 481 }; 482 483 struct br_input_skb_cb { 484 struct net_device *brdev; 485 486 u16 frag_max_size; 487 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 488 u8 igmp; 489 u8 mrouters_only:1; 490 #endif 491 u8 proxyarp_replied:1; 492 u8 src_port_isolated:1; 493 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 494 u8 vlan_filtered:1; 495 #endif 496 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 497 u8 br_netfilter_broute:1; 498 #endif 499 500 #ifdef CONFIG_NET_SWITCHDEV 501 int offload_fwd_mark; 502 #endif 503 }; 504 505 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 506 507 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 508 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 509 #else 510 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 511 #endif 512 513 #define br_printk(level, br, format, args...) \ 514 printk(level "%s: " format, (br)->dev->name, ##args) 515 516 #define br_err(__br, format, args...) \ 517 br_printk(KERN_ERR, __br, format, ##args) 518 #define br_warn(__br, format, args...) \ 519 br_printk(KERN_WARNING, __br, format, ##args) 520 #define br_notice(__br, format, args...) \ 521 br_printk(KERN_NOTICE, __br, format, ##args) 522 #define br_info(__br, format, args...) \ 523 br_printk(KERN_INFO, __br, format, ##args) 524 525 #define br_debug(br, format, args...) \ 526 pr_debug("%s: " format, (br)->dev->name, ##args) 527 528 /* called under bridge lock */ 529 static inline int br_is_root_bridge(const struct net_bridge *br) 530 { 531 return !memcmp(&br->bridge_id, &br->designated_root, 8); 532 } 533 534 /* check if a VLAN entry is global */ 535 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 536 { 537 return v->flags & BRIDGE_VLAN_INFO_MASTER; 538 } 539 540 /* check if a VLAN entry is used by the bridge */ 541 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 542 { 543 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 544 } 545 546 /* check if we should use the vlan entry, returns false if it's only context */ 547 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 548 { 549 if (br_vlan_is_master(v)) { 550 if (br_vlan_is_brentry(v)) 551 return true; 552 else 553 return false; 554 } 555 556 return true; 557 } 558 559 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 560 { 561 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 562 } 563 564 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 565 { 566 bool ret = vid > 0 && vid < VLAN_VID_MASK; 567 568 if (!ret) 569 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 570 571 return ret; 572 } 573 574 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 575 const struct bridge_vlan_info *last, 576 struct netlink_ext_ack *extack) 577 { 578 /* pvid flag is not allowed in ranges */ 579 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 580 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 581 return false; 582 } 583 584 /* when cur is the range end, check if: 585 * - it has range start flag 586 * - range ids are invalid (end is equal to or before start) 587 */ 588 if (last) { 589 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 590 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 591 return false; 592 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 593 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 594 return false; 595 } else if (cur->vid <= last->vid) { 596 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 597 return false; 598 } 599 } 600 601 /* check for required range flags */ 602 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 603 BRIDGE_VLAN_INFO_RANGE_END))) { 604 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 605 return false; 606 } 607 608 return true; 609 } 610 611 static inline int br_afspec_cmd_to_rtm(int cmd) 612 { 613 switch (cmd) { 614 case RTM_SETLINK: 615 return RTM_NEWVLAN; 616 case RTM_DELLINK: 617 return RTM_DELVLAN; 618 } 619 620 return 0; 621 } 622 623 static inline int br_opt_get(const struct net_bridge *br, 624 enum net_bridge_opts opt) 625 { 626 return test_bit(opt, &br->options); 627 } 628 629 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 630 struct netlink_ext_ack *extack); 631 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 632 int br_boolopt_multi_toggle(struct net_bridge *br, 633 struct br_boolopt_multi *bm, 634 struct netlink_ext_ack *extack); 635 void br_boolopt_multi_get(const struct net_bridge *br, 636 struct br_boolopt_multi *bm); 637 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 638 639 /* br_device.c */ 640 void br_dev_setup(struct net_device *dev); 641 void br_dev_delete(struct net_device *dev, struct list_head *list); 642 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 643 #ifdef CONFIG_NET_POLL_CONTROLLER 644 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 645 struct sk_buff *skb) 646 { 647 netpoll_send_skb(p->np, skb); 648 } 649 650 int br_netpoll_enable(struct net_bridge_port *p); 651 void br_netpoll_disable(struct net_bridge_port *p); 652 #else 653 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 654 struct sk_buff *skb) 655 { 656 } 657 658 static inline int br_netpoll_enable(struct net_bridge_port *p) 659 { 660 return 0; 661 } 662 663 static inline void br_netpoll_disable(struct net_bridge_port *p) 664 { 665 } 666 #endif 667 668 /* br_fdb.c */ 669 int br_fdb_init(void); 670 void br_fdb_fini(void); 671 int br_fdb_hash_init(struct net_bridge *br); 672 void br_fdb_hash_fini(struct net_bridge *br); 673 void br_fdb_flush(struct net_bridge *br); 674 void br_fdb_find_delete_local(struct net_bridge *br, 675 const struct net_bridge_port *p, 676 const unsigned char *addr, u16 vid); 677 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 678 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 679 void br_fdb_cleanup(struct work_struct *work); 680 void br_fdb_delete_by_port(struct net_bridge *br, 681 const struct net_bridge_port *p, u16 vid, int do_all); 682 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 683 const unsigned char *addr, 684 __u16 vid); 685 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 686 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 687 unsigned long off); 688 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 689 const unsigned char *addr, u16 vid); 690 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 691 const unsigned char *addr, u16 vid, unsigned long flags); 692 693 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 694 struct net_device *dev, const unsigned char *addr, u16 vid); 695 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 696 const unsigned char *addr, u16 vid, u16 nlh_flags, 697 struct netlink_ext_ack *extack); 698 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 699 struct net_device *dev, struct net_device *fdev, int *idx); 700 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 701 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 702 struct netlink_ext_ack *extack); 703 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 704 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 705 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 706 const unsigned char *addr, u16 vid, 707 bool swdev_notify); 708 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 709 const unsigned char *addr, u16 vid, 710 bool swdev_notify); 711 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 712 const unsigned char *addr, u16 vid, bool offloaded); 713 714 /* br_forward.c */ 715 enum br_pkt_type { 716 BR_PKT_UNICAST, 717 BR_PKT_MULTICAST, 718 BR_PKT_BROADCAST 719 }; 720 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 721 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 722 bool local_rcv, bool local_orig); 723 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 724 void br_flood(struct net_bridge *br, struct sk_buff *skb, 725 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 726 727 /* return true if both source port and dest port are isolated */ 728 static inline bool br_skb_isolated(const struct net_bridge_port *to, 729 const struct sk_buff *skb) 730 { 731 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 732 (to->flags & BR_ISOLATED); 733 } 734 735 /* br_if.c */ 736 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 737 int br_add_bridge(struct net *net, const char *name); 738 int br_del_bridge(struct net *net, const char *name); 739 int br_add_if(struct net_bridge *br, struct net_device *dev, 740 struct netlink_ext_ack *extack); 741 int br_del_if(struct net_bridge *br, struct net_device *dev); 742 void br_mtu_auto_adjust(struct net_bridge *br); 743 netdev_features_t br_features_recompute(struct net_bridge *br, 744 netdev_features_t features); 745 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 746 void br_manage_promisc(struct net_bridge *br); 747 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 748 749 /* br_input.c */ 750 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 751 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 752 753 struct br_frame_type { 754 __be16 type; 755 int (*frame_handler)(struct net_bridge_port *port, 756 struct sk_buff *skb); 757 struct hlist_node list; 758 }; 759 760 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 761 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 762 763 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 764 { 765 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 766 } 767 768 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 769 { 770 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 771 } 772 773 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 774 { 775 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 776 } 777 778 static inline struct net_bridge_port * 779 br_port_get_check_rtnl(const struct net_device *dev) 780 { 781 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 782 } 783 784 /* br_ioctl.c */ 785 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 786 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 787 void __user *arg); 788 789 /* br_multicast.c */ 790 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 791 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 792 struct sk_buff *skb, u16 vid); 793 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 794 struct sk_buff *skb, u16 vid); 795 int br_multicast_add_port(struct net_bridge_port *port); 796 void br_multicast_del_port(struct net_bridge_port *port); 797 void br_multicast_enable_port(struct net_bridge_port *port); 798 void br_multicast_disable_port(struct net_bridge_port *port); 799 void br_multicast_init(struct net_bridge *br); 800 void br_multicast_open(struct net_bridge *br); 801 void br_multicast_stop(struct net_bridge *br); 802 void br_multicast_dev_del(struct net_bridge *br); 803 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 804 struct sk_buff *skb, bool local_rcv, bool local_orig); 805 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 806 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 807 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 808 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 809 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 810 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 811 #if IS_ENABLED(CONFIG_IPV6) 812 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 813 #endif 814 struct net_bridge_mdb_entry * 815 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 816 struct net_bridge_mdb_entry * 817 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 818 struct net_bridge_port_group * 819 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 820 struct net_bridge_port_group __rcu *next, 821 unsigned char flags, const unsigned char *src, 822 u8 filter_mode, u8 rt_protocol); 823 int br_mdb_hash_init(struct net_bridge *br); 824 void br_mdb_hash_fini(struct net_bridge *br); 825 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 826 struct net_bridge_port_group *pg, int type); 827 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 828 int type); 829 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 830 struct net_bridge_port_group *pg, 831 struct net_bridge_port_group __rcu **pp); 832 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 833 const struct sk_buff *skb, u8 type, u8 dir); 834 int br_multicast_init_stats(struct net_bridge *br); 835 void br_multicast_uninit_stats(struct net_bridge *br); 836 void br_multicast_get_stats(const struct net_bridge *br, 837 const struct net_bridge_port *p, 838 struct br_mcast_stats *dest); 839 void br_mdb_init(void); 840 void br_mdb_uninit(void); 841 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 842 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 843 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 844 u8 filter_mode); 845 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 846 struct net_bridge_port_group *sg); 847 848 static inline bool br_group_is_l2(const struct br_ip *group) 849 { 850 return group->proto == 0; 851 } 852 853 #define mlock_dereference(X, br) \ 854 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 855 856 static inline bool br_multicast_is_router(struct net_bridge *br) 857 { 858 return br->multicast_router == 2 || 859 (br->multicast_router == 1 && 860 timer_pending(&br->multicast_router_timer)); 861 } 862 863 static inline bool 864 __br_multicast_querier_exists(struct net_bridge *br, 865 struct bridge_mcast_other_query *querier, 866 const bool is_ipv6) 867 { 868 bool own_querier_enabled; 869 870 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 871 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 872 own_querier_enabled = false; 873 else 874 own_querier_enabled = true; 875 } else { 876 own_querier_enabled = false; 877 } 878 879 return time_is_before_jiffies(querier->delay_time) && 880 (own_querier_enabled || timer_pending(&querier->timer)); 881 } 882 883 static inline bool br_multicast_querier_exists(struct net_bridge *br, 884 struct ethhdr *eth, 885 const struct net_bridge_mdb_entry *mdb) 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 !!mdb && br_group_is_l2(&mdb->addr); 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 const struct net_bridge_mdb_entry *mdb) 1009 { 1010 return false; 1011 } 1012 1013 static inline void br_mdb_init(void) 1014 { 1015 } 1016 1017 static inline void br_mdb_uninit(void) 1018 { 1019 } 1020 1021 static inline int br_mdb_hash_init(struct net_bridge *br) 1022 { 1023 return 0; 1024 } 1025 1026 static inline void br_mdb_hash_fini(struct net_bridge *br) 1027 { 1028 } 1029 1030 static inline void br_multicast_count(struct net_bridge *br, 1031 const struct net_bridge_port *p, 1032 const struct sk_buff *skb, 1033 u8 type, u8 dir) 1034 { 1035 } 1036 1037 static inline int br_multicast_init_stats(struct net_bridge *br) 1038 { 1039 return 0; 1040 } 1041 1042 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1043 { 1044 } 1045 1046 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1047 { 1048 return 0; 1049 } 1050 #endif 1051 1052 /* br_vlan.c */ 1053 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1054 bool br_allowed_ingress(const struct net_bridge *br, 1055 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1056 u16 *vid, u8 *state); 1057 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1058 const struct sk_buff *skb); 1059 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1060 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1061 const struct net_bridge_port *port, 1062 struct net_bridge_vlan_group *vg, 1063 struct sk_buff *skb); 1064 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1065 bool *changed, struct netlink_ext_ack *extack); 1066 int br_vlan_delete(struct net_bridge *br, u16 vid); 1067 void br_vlan_flush(struct net_bridge *br); 1068 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1069 void br_recalculate_fwd_mask(struct net_bridge *br); 1070 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1071 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1072 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1073 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1074 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1075 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1076 int br_vlan_init(struct net_bridge *br); 1077 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1078 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1079 struct netlink_ext_ack *extack); 1080 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1081 bool *changed, struct netlink_ext_ack *extack); 1082 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1083 void nbp_vlan_flush(struct net_bridge_port *port); 1084 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1085 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1086 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1087 struct pcpu_sw_netstats *stats); 1088 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1089 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1090 void *ptr); 1091 void br_vlan_rtnl_init(void); 1092 void br_vlan_rtnl_uninit(void); 1093 void br_vlan_notify(const struct net_bridge *br, 1094 const struct net_bridge_port *p, 1095 u16 vid, u16 vid_range, 1096 int cmd); 1097 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1098 const struct net_bridge_vlan *range_end); 1099 1100 static inline struct net_bridge_vlan_group *br_vlan_group( 1101 const struct net_bridge *br) 1102 { 1103 return rtnl_dereference(br->vlgrp); 1104 } 1105 1106 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1107 const struct net_bridge_port *p) 1108 { 1109 return rtnl_dereference(p->vlgrp); 1110 } 1111 1112 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1113 const struct net_bridge *br) 1114 { 1115 return rcu_dereference(br->vlgrp); 1116 } 1117 1118 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1119 const struct net_bridge_port *p) 1120 { 1121 return rcu_dereference(p->vlgrp); 1122 } 1123 1124 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1125 * skb, the vlan tag will always be present if the frame was tagged. 1126 */ 1127 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1128 { 1129 int err = 0; 1130 1131 if (skb_vlan_tag_present(skb)) { 1132 *vid = skb_vlan_tag_get_id(skb); 1133 } else { 1134 *vid = 0; 1135 err = -EINVAL; 1136 } 1137 1138 return err; 1139 } 1140 1141 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1142 { 1143 if (!vg) 1144 return 0; 1145 1146 smp_rmb(); 1147 return vg->pvid; 1148 } 1149 1150 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1151 { 1152 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1153 } 1154 #else 1155 static inline bool br_allowed_ingress(const struct net_bridge *br, 1156 struct net_bridge_vlan_group *vg, 1157 struct sk_buff *skb, 1158 u16 *vid, u8 *state) 1159 { 1160 return true; 1161 } 1162 1163 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1164 const struct sk_buff *skb) 1165 { 1166 return true; 1167 } 1168 1169 static inline bool br_should_learn(struct net_bridge_port *p, 1170 struct sk_buff *skb, u16 *vid) 1171 { 1172 return true; 1173 } 1174 1175 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1176 const struct net_bridge_port *port, 1177 struct net_bridge_vlan_group *vg, 1178 struct sk_buff *skb) 1179 { 1180 return skb; 1181 } 1182 1183 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1184 bool *changed, struct netlink_ext_ack *extack) 1185 { 1186 *changed = false; 1187 return -EOPNOTSUPP; 1188 } 1189 1190 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1191 { 1192 return -EOPNOTSUPP; 1193 } 1194 1195 static inline void br_vlan_flush(struct net_bridge *br) 1196 { 1197 } 1198 1199 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1200 { 1201 } 1202 1203 static inline int br_vlan_init(struct net_bridge *br) 1204 { 1205 return 0; 1206 } 1207 1208 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1209 bool *changed, struct netlink_ext_ack *extack) 1210 { 1211 *changed = false; 1212 return -EOPNOTSUPP; 1213 } 1214 1215 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1216 { 1217 return -EOPNOTSUPP; 1218 } 1219 1220 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1221 { 1222 } 1223 1224 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1225 u16 vid) 1226 { 1227 return NULL; 1228 } 1229 1230 static inline int nbp_vlan_init(struct net_bridge_port *port, 1231 struct netlink_ext_ack *extack) 1232 { 1233 return 0; 1234 } 1235 1236 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1237 { 1238 return 0; 1239 } 1240 1241 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1242 { 1243 return 0; 1244 } 1245 1246 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1247 unsigned long val) 1248 { 1249 return -EOPNOTSUPP; 1250 } 1251 1252 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1253 u32 filter_mask) 1254 { 1255 return 0; 1256 } 1257 1258 static inline struct net_bridge_vlan_group *br_vlan_group( 1259 const struct net_bridge *br) 1260 { 1261 return NULL; 1262 } 1263 1264 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1265 const struct net_bridge_port *p) 1266 { 1267 return NULL; 1268 } 1269 1270 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1271 const struct net_bridge *br) 1272 { 1273 return NULL; 1274 } 1275 1276 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1277 const struct net_bridge_port *p) 1278 { 1279 return NULL; 1280 } 1281 1282 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1283 struct pcpu_sw_netstats *stats) 1284 { 1285 } 1286 1287 static inline void br_vlan_port_event(struct net_bridge_port *p, 1288 unsigned long event) 1289 { 1290 } 1291 1292 static inline int br_vlan_bridge_event(struct net_device *dev, 1293 unsigned long event, void *ptr) 1294 { 1295 return 0; 1296 } 1297 1298 static inline void br_vlan_rtnl_init(void) 1299 { 1300 } 1301 1302 static inline void br_vlan_rtnl_uninit(void) 1303 { 1304 } 1305 1306 static inline void br_vlan_notify(const struct net_bridge *br, 1307 const struct net_bridge_port *p, 1308 u16 vid, u16 vid_range, 1309 int cmd) 1310 { 1311 } 1312 1313 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1314 const struct net_bridge_vlan *range_end) 1315 { 1316 return true; 1317 } 1318 #endif 1319 1320 /* br_vlan_options.c */ 1321 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1322 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1323 const struct net_bridge_vlan *range_end); 1324 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1325 size_t br_vlan_opts_nl_size(void); 1326 int br_vlan_process_options(const struct net_bridge *br, 1327 const struct net_bridge_port *p, 1328 struct net_bridge_vlan *range_start, 1329 struct net_bridge_vlan *range_end, 1330 struct nlattr **tb, 1331 struct netlink_ext_ack *extack); 1332 1333 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1334 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1335 { 1336 return READ_ONCE(v->state); 1337 } 1338 1339 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1340 { 1341 WRITE_ONCE(v->state, state); 1342 } 1343 1344 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1345 { 1346 return READ_ONCE(vg->pvid_state); 1347 } 1348 1349 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1350 u8 state) 1351 { 1352 WRITE_ONCE(vg->pvid_state, state); 1353 } 1354 1355 /* learn_allow is true at ingress and false at egress */ 1356 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1357 { 1358 switch (state) { 1359 case BR_STATE_LEARNING: 1360 return learn_allow; 1361 case BR_STATE_FORWARDING: 1362 return true; 1363 default: 1364 return false; 1365 } 1366 } 1367 #endif 1368 1369 struct nf_br_ops { 1370 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1371 }; 1372 extern const struct nf_br_ops __rcu *nf_br_ops; 1373 1374 /* br_netfilter.c */ 1375 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1376 int br_nf_core_init(void); 1377 void br_nf_core_fini(void); 1378 void br_netfilter_rtable_init(struct net_bridge *); 1379 #else 1380 static inline int br_nf_core_init(void) { return 0; } 1381 static inline void br_nf_core_fini(void) {} 1382 #define br_netfilter_rtable_init(x) 1383 #endif 1384 1385 /* br_stp.c */ 1386 void br_set_state(struct net_bridge_port *p, unsigned int state); 1387 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1388 void br_init_port(struct net_bridge_port *p); 1389 void br_become_designated_port(struct net_bridge_port *p); 1390 1391 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1392 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1393 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1394 int br_set_max_age(struct net_bridge *br, unsigned long x); 1395 int __set_ageing_time(struct net_device *dev, unsigned long t); 1396 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1397 1398 1399 /* br_stp_if.c */ 1400 void br_stp_enable_bridge(struct net_bridge *br); 1401 void br_stp_disable_bridge(struct net_bridge *br); 1402 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1403 struct netlink_ext_ack *extack); 1404 void br_stp_enable_port(struct net_bridge_port *p); 1405 void br_stp_disable_port(struct net_bridge_port *p); 1406 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1407 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1408 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1409 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1410 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1411 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1412 1413 /* br_stp_bpdu.c */ 1414 struct stp_proto; 1415 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1416 struct net_device *dev); 1417 1418 /* br_stp_timer.c */ 1419 void br_stp_timer_init(struct net_bridge *br); 1420 void br_stp_port_timer_init(struct net_bridge_port *p); 1421 unsigned long br_timer_value(const struct timer_list *timer); 1422 1423 /* br.c */ 1424 #if IS_ENABLED(CONFIG_ATM_LANE) 1425 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1426 #endif 1427 1428 /* br_mrp.c */ 1429 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1430 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1431 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1432 bool br_mrp_enabled(struct net_bridge *br); 1433 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1434 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1435 #else 1436 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1437 struct nlattr *attr, int cmd, 1438 struct netlink_ext_ack *extack) 1439 { 1440 return -EOPNOTSUPP; 1441 } 1442 1443 static inline bool br_mrp_enabled(struct net_bridge *br) 1444 { 1445 return false; 1446 } 1447 1448 static inline void br_mrp_port_del(struct net_bridge *br, 1449 struct net_bridge_port *p) 1450 { 1451 } 1452 1453 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1454 { 1455 return 0; 1456 } 1457 1458 #endif 1459 1460 /* br_cfm.c */ 1461 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1462 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1463 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1464 bool br_cfm_created(struct net_bridge *br); 1465 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1466 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1467 int br_cfm_status_fill_info(struct sk_buff *skb, 1468 struct net_bridge *br, 1469 bool getlink); 1470 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1471 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1472 #else 1473 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1474 struct nlattr *attr, int cmd, 1475 struct netlink_ext_ack *extack) 1476 { 1477 return -EOPNOTSUPP; 1478 } 1479 1480 static inline bool br_cfm_created(struct net_bridge *br) 1481 { 1482 return false; 1483 } 1484 1485 static inline void br_cfm_port_del(struct net_bridge *br, 1486 struct net_bridge_port *p) 1487 { 1488 } 1489 1490 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1491 { 1492 return -EOPNOTSUPP; 1493 } 1494 1495 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1496 struct net_bridge *br, 1497 bool getlink) 1498 { 1499 return -EOPNOTSUPP; 1500 } 1501 1502 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1503 { 1504 return -EOPNOTSUPP; 1505 } 1506 1507 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1508 { 1509 return -EOPNOTSUPP; 1510 } 1511 #endif 1512 1513 /* br_netlink.c */ 1514 extern struct rtnl_link_ops br_link_ops; 1515 int br_netlink_init(void); 1516 void br_netlink_fini(void); 1517 void br_ifinfo_notify(int event, const struct net_bridge *br, 1518 const struct net_bridge_port *port); 1519 void br_info_notify(int event, const struct net_bridge *br, 1520 const struct net_bridge_port *port, u32 filter); 1521 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1522 struct netlink_ext_ack *extack); 1523 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1524 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1525 u32 filter_mask, int nlflags); 1526 int br_process_vlan_info(struct net_bridge *br, 1527 struct net_bridge_port *p, int cmd, 1528 struct bridge_vlan_info *vinfo_curr, 1529 struct bridge_vlan_info **vinfo_last, 1530 bool *changed, 1531 struct netlink_ext_ack *extack); 1532 1533 #ifdef CONFIG_SYSFS 1534 /* br_sysfs_if.c */ 1535 extern const struct sysfs_ops brport_sysfs_ops; 1536 int br_sysfs_addif(struct net_bridge_port *p); 1537 int br_sysfs_renameif(struct net_bridge_port *p); 1538 1539 /* br_sysfs_br.c */ 1540 int br_sysfs_addbr(struct net_device *dev); 1541 void br_sysfs_delbr(struct net_device *dev); 1542 1543 #else 1544 1545 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1546 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1547 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1548 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1549 #endif /* CONFIG_SYSFS */ 1550 1551 /* br_switchdev.c */ 1552 #ifdef CONFIG_NET_SWITCHDEV 1553 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1554 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1555 struct sk_buff *skb); 1556 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1557 const struct sk_buff *skb); 1558 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1559 unsigned long flags, 1560 unsigned long mask); 1561 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1562 int type); 1563 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1564 struct netlink_ext_ack *extack); 1565 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1566 1567 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1568 { 1569 skb->offload_fwd_mark = 0; 1570 } 1571 #else 1572 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1573 { 1574 return 0; 1575 } 1576 1577 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1578 struct sk_buff *skb) 1579 { 1580 } 1581 1582 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1583 const struct sk_buff *skb) 1584 { 1585 return true; 1586 } 1587 1588 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1589 unsigned long flags, 1590 unsigned long mask) 1591 { 1592 return 0; 1593 } 1594 1595 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1596 u16 vid, u16 flags, 1597 struct netlink_ext_ack *extack) 1598 { 1599 return -EOPNOTSUPP; 1600 } 1601 1602 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1603 { 1604 return -EOPNOTSUPP; 1605 } 1606 1607 static inline void 1608 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1609 { 1610 } 1611 1612 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1613 { 1614 } 1615 #endif /* CONFIG_NET_SWITCHDEV */ 1616 1617 /* br_arp_nd_proxy.c */ 1618 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1619 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1620 u16 vid, struct net_bridge_port *p); 1621 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1622 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1623 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1624 #endif 1625