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 list_head port_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 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 399 union { 400 struct rtable fake_rtable; 401 struct rt6_info fake_rt6_info; 402 }; 403 #endif 404 u16 group_fwd_mask; 405 u16 group_fwd_mask_required; 406 407 /* STP */ 408 bridge_id designated_root; 409 bridge_id bridge_id; 410 unsigned char topology_change; 411 unsigned char topology_change_detected; 412 u16 root_port; 413 unsigned long max_age; 414 unsigned long hello_time; 415 unsigned long forward_delay; 416 unsigned long ageing_time; 417 unsigned long bridge_max_age; 418 unsigned long bridge_hello_time; 419 unsigned long bridge_forward_delay; 420 unsigned long bridge_ageing_time; 421 u32 root_path_cost; 422 423 u8 group_addr[ETH_ALEN]; 424 425 enum { 426 BR_NO_STP, /* no spanning tree */ 427 BR_KERNEL_STP, /* old STP in kernel */ 428 BR_USER_STP, /* new RSTP in userspace */ 429 } stp_enabled; 430 431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 432 433 u32 hash_max; 434 435 u32 multicast_last_member_count; 436 u32 multicast_startup_query_count; 437 438 u8 multicast_igmp_version; 439 u8 multicast_router; 440 #if IS_ENABLED(CONFIG_IPV6) 441 u8 multicast_mld_version; 442 #endif 443 spinlock_t multicast_lock; 444 unsigned long multicast_last_member_interval; 445 unsigned long multicast_membership_interval; 446 unsigned long multicast_querier_interval; 447 unsigned long multicast_query_interval; 448 unsigned long multicast_query_response_interval; 449 unsigned long multicast_startup_query_interval; 450 451 struct rhashtable mdb_hash_tbl; 452 struct rhashtable sg_port_tbl; 453 454 struct hlist_head mcast_gc_list; 455 struct hlist_head mdb_list; 456 struct hlist_head router_list; 457 458 struct timer_list multicast_router_timer; 459 struct bridge_mcast_other_query ip4_other_query; 460 struct bridge_mcast_own_query ip4_own_query; 461 struct bridge_mcast_querier ip4_querier; 462 struct bridge_mcast_stats __percpu *mcast_stats; 463 #if IS_ENABLED(CONFIG_IPV6) 464 struct bridge_mcast_other_query ip6_other_query; 465 struct bridge_mcast_own_query ip6_own_query; 466 struct bridge_mcast_querier ip6_querier; 467 #endif /* IS_ENABLED(CONFIG_IPV6) */ 468 struct work_struct mcast_gc_work; 469 #endif 470 471 struct timer_list hello_timer; 472 struct timer_list tcn_timer; 473 struct timer_list topology_change_timer; 474 struct delayed_work gc_work; 475 struct kobject *ifobj; 476 u32 auto_cnt; 477 478 #ifdef CONFIG_NET_SWITCHDEV 479 int offload_fwd_mark; 480 #endif 481 struct hlist_head fdb_list; 482 483 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 484 struct list_head mrp_list; 485 #endif 486 }; 487 488 struct br_input_skb_cb { 489 struct net_device *brdev; 490 491 u16 frag_max_size; 492 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 493 u8 igmp; 494 u8 mrouters_only:1; 495 #endif 496 u8 proxyarp_replied:1; 497 u8 src_port_isolated:1; 498 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 499 u8 vlan_filtered:1; 500 #endif 501 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 502 u8 br_netfilter_broute:1; 503 #endif 504 505 #ifdef CONFIG_NET_SWITCHDEV 506 int offload_fwd_mark; 507 #endif 508 }; 509 510 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 511 512 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 513 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 514 #else 515 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 516 #endif 517 518 #define br_printk(level, br, format, args...) \ 519 printk(level "%s: " format, (br)->dev->name, ##args) 520 521 #define br_err(__br, format, args...) \ 522 br_printk(KERN_ERR, __br, format, ##args) 523 #define br_warn(__br, format, args...) \ 524 br_printk(KERN_WARNING, __br, format, ##args) 525 #define br_notice(__br, format, args...) \ 526 br_printk(KERN_NOTICE, __br, format, ##args) 527 #define br_info(__br, format, args...) \ 528 br_printk(KERN_INFO, __br, format, ##args) 529 530 #define br_debug(br, format, args...) \ 531 pr_debug("%s: " format, (br)->dev->name, ##args) 532 533 /* called under bridge lock */ 534 static inline int br_is_root_bridge(const struct net_bridge *br) 535 { 536 return !memcmp(&br->bridge_id, &br->designated_root, 8); 537 } 538 539 /* check if a VLAN entry is global */ 540 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 541 { 542 return v->flags & BRIDGE_VLAN_INFO_MASTER; 543 } 544 545 /* check if a VLAN entry is used by the bridge */ 546 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 547 { 548 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 549 } 550 551 /* check if we should use the vlan entry, returns false if it's only context */ 552 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 553 { 554 if (br_vlan_is_master(v)) { 555 if (br_vlan_is_brentry(v)) 556 return true; 557 else 558 return false; 559 } 560 561 return true; 562 } 563 564 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 565 { 566 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 567 } 568 569 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 570 { 571 bool ret = vid > 0 && vid < VLAN_VID_MASK; 572 573 if (!ret) 574 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 575 576 return ret; 577 } 578 579 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 580 const struct bridge_vlan_info *last, 581 struct netlink_ext_ack *extack) 582 { 583 /* pvid flag is not allowed in ranges */ 584 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 585 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 586 return false; 587 } 588 589 /* when cur is the range end, check if: 590 * - it has range start flag 591 * - range ids are invalid (end is equal to or before start) 592 */ 593 if (last) { 594 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 595 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 596 return false; 597 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 598 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 599 return false; 600 } else if (cur->vid <= last->vid) { 601 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 602 return false; 603 } 604 } 605 606 /* check for required range flags */ 607 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 608 BRIDGE_VLAN_INFO_RANGE_END))) { 609 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 610 return false; 611 } 612 613 return true; 614 } 615 616 static inline int br_afspec_cmd_to_rtm(int cmd) 617 { 618 switch (cmd) { 619 case RTM_SETLINK: 620 return RTM_NEWVLAN; 621 case RTM_DELLINK: 622 return RTM_DELVLAN; 623 } 624 625 return 0; 626 } 627 628 static inline int br_opt_get(const struct net_bridge *br, 629 enum net_bridge_opts opt) 630 { 631 return test_bit(opt, &br->options); 632 } 633 634 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 635 struct netlink_ext_ack *extack); 636 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 637 int br_boolopt_multi_toggle(struct net_bridge *br, 638 struct br_boolopt_multi *bm, 639 struct netlink_ext_ack *extack); 640 void br_boolopt_multi_get(const struct net_bridge *br, 641 struct br_boolopt_multi *bm); 642 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 643 644 /* br_device.c */ 645 void br_dev_setup(struct net_device *dev); 646 void br_dev_delete(struct net_device *dev, struct list_head *list); 647 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 648 #ifdef CONFIG_NET_POLL_CONTROLLER 649 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 650 struct sk_buff *skb) 651 { 652 netpoll_send_skb(p->np, skb); 653 } 654 655 int br_netpoll_enable(struct net_bridge_port *p); 656 void br_netpoll_disable(struct net_bridge_port *p); 657 #else 658 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 659 struct sk_buff *skb) 660 { 661 } 662 663 static inline int br_netpoll_enable(struct net_bridge_port *p) 664 { 665 return 0; 666 } 667 668 static inline void br_netpoll_disable(struct net_bridge_port *p) 669 { 670 } 671 #endif 672 673 /* br_fdb.c */ 674 int br_fdb_init(void); 675 void br_fdb_fini(void); 676 int br_fdb_hash_init(struct net_bridge *br); 677 void br_fdb_hash_fini(struct net_bridge *br); 678 void br_fdb_flush(struct net_bridge *br); 679 void br_fdb_find_delete_local(struct net_bridge *br, 680 const struct net_bridge_port *p, 681 const unsigned char *addr, u16 vid); 682 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 683 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 684 void br_fdb_cleanup(struct work_struct *work); 685 void br_fdb_delete_by_port(struct net_bridge *br, 686 const struct net_bridge_port *p, u16 vid, int do_all); 687 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 688 const unsigned char *addr, 689 __u16 vid); 690 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 691 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 692 unsigned long off); 693 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 694 const unsigned char *addr, u16 vid); 695 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 696 const unsigned char *addr, u16 vid, unsigned long flags); 697 698 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 699 struct net_device *dev, const unsigned char *addr, u16 vid); 700 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 701 const unsigned char *addr, u16 vid, u16 nlh_flags, 702 struct netlink_ext_ack *extack); 703 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 704 struct net_device *dev, struct net_device *fdev, int *idx); 705 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 706 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 707 struct netlink_ext_ack *extack); 708 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 709 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 710 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 711 const unsigned char *addr, u16 vid, 712 bool swdev_notify); 713 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 714 const unsigned char *addr, u16 vid, 715 bool swdev_notify); 716 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 717 const unsigned char *addr, u16 vid, bool offloaded); 718 719 /* br_forward.c */ 720 enum br_pkt_type { 721 BR_PKT_UNICAST, 722 BR_PKT_MULTICAST, 723 BR_PKT_BROADCAST 724 }; 725 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 726 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 727 bool local_rcv, bool local_orig); 728 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 729 void br_flood(struct net_bridge *br, struct sk_buff *skb, 730 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 731 732 /* return true if both source port and dest port are isolated */ 733 static inline bool br_skb_isolated(const struct net_bridge_port *to, 734 const struct sk_buff *skb) 735 { 736 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 737 (to->flags & BR_ISOLATED); 738 } 739 740 /* br_if.c */ 741 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 742 int br_add_bridge(struct net *net, const char *name); 743 int br_del_bridge(struct net *net, const char *name); 744 int br_add_if(struct net_bridge *br, struct net_device *dev, 745 struct netlink_ext_ack *extack); 746 int br_del_if(struct net_bridge *br, struct net_device *dev); 747 void br_mtu_auto_adjust(struct net_bridge *br); 748 netdev_features_t br_features_recompute(struct net_bridge *br, 749 netdev_features_t features); 750 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 751 void br_manage_promisc(struct net_bridge *br); 752 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 753 754 /* br_input.c */ 755 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 756 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 757 758 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 759 { 760 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 761 } 762 763 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 764 { 765 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 766 } 767 768 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 769 { 770 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 771 } 772 773 static inline struct net_bridge_port * 774 br_port_get_check_rtnl(const struct net_device *dev) 775 { 776 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 777 } 778 779 /* br_ioctl.c */ 780 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 781 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 782 void __user *arg); 783 784 /* br_multicast.c */ 785 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 786 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 787 struct sk_buff *skb, u16 vid); 788 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 789 struct sk_buff *skb, u16 vid); 790 int br_multicast_add_port(struct net_bridge_port *port); 791 void br_multicast_del_port(struct net_bridge_port *port); 792 void br_multicast_enable_port(struct net_bridge_port *port); 793 void br_multicast_disable_port(struct net_bridge_port *port); 794 void br_multicast_init(struct net_bridge *br); 795 void br_multicast_join_snoopers(struct net_bridge *br); 796 void br_multicast_leave_snoopers(struct net_bridge *br); 797 void br_multicast_open(struct net_bridge *br); 798 void br_multicast_stop(struct net_bridge *br); 799 void br_multicast_dev_del(struct net_bridge *br); 800 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 801 struct sk_buff *skb, bool local_rcv, bool local_orig); 802 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 803 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 804 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 805 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 806 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 807 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 808 #if IS_ENABLED(CONFIG_IPV6) 809 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 810 #endif 811 struct net_bridge_mdb_entry * 812 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 813 struct net_bridge_mdb_entry * 814 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 815 struct net_bridge_port_group * 816 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 817 struct net_bridge_port_group __rcu *next, 818 unsigned char flags, const unsigned char *src, 819 u8 filter_mode, u8 rt_protocol); 820 int br_mdb_hash_init(struct net_bridge *br); 821 void br_mdb_hash_fini(struct net_bridge *br); 822 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 823 struct net_bridge_port_group *pg, int type); 824 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 825 int type); 826 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 827 struct net_bridge_port_group *pg, 828 struct net_bridge_port_group __rcu **pp); 829 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 830 const struct sk_buff *skb, u8 type, u8 dir); 831 int br_multicast_init_stats(struct net_bridge *br); 832 void br_multicast_uninit_stats(struct net_bridge *br); 833 void br_multicast_get_stats(const struct net_bridge *br, 834 const struct net_bridge_port *p, 835 struct br_mcast_stats *dest); 836 void br_mdb_init(void); 837 void br_mdb_uninit(void); 838 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 839 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 840 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 841 u8 filter_mode); 842 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 843 struct net_bridge_port_group *sg); 844 845 #define mlock_dereference(X, br) \ 846 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 847 848 static inline bool br_multicast_is_router(struct net_bridge *br) 849 { 850 return br->multicast_router == 2 || 851 (br->multicast_router == 1 && 852 timer_pending(&br->multicast_router_timer)); 853 } 854 855 static inline bool 856 __br_multicast_querier_exists(struct net_bridge *br, 857 struct bridge_mcast_other_query *querier, 858 const bool is_ipv6) 859 { 860 bool own_querier_enabled; 861 862 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 863 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 864 own_querier_enabled = false; 865 else 866 own_querier_enabled = true; 867 } else { 868 own_querier_enabled = false; 869 } 870 871 return time_is_before_jiffies(querier->delay_time) && 872 (own_querier_enabled || timer_pending(&querier->timer)); 873 } 874 875 static inline bool br_multicast_querier_exists(struct net_bridge *br, 876 struct ethhdr *eth) 877 { 878 switch (eth->h_proto) { 879 case (htons(ETH_P_IP)): 880 return __br_multicast_querier_exists(br, 881 &br->ip4_other_query, false); 882 #if IS_ENABLED(CONFIG_IPV6) 883 case (htons(ETH_P_IPV6)): 884 return __br_multicast_querier_exists(br, 885 &br->ip6_other_query, true); 886 #endif 887 default: 888 return false; 889 } 890 } 891 892 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 893 { 894 switch (ip->proto) { 895 case htons(ETH_P_IP): 896 return ipv4_is_zeronet(ip->src.ip4); 897 #if IS_ENABLED(CONFIG_IPV6) 898 case htons(ETH_P_IPV6): 899 return ipv6_addr_any(&ip->src.ip6); 900 #endif 901 default: 902 return false; 903 } 904 } 905 906 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 907 __be16 proto) 908 { 909 switch (proto) { 910 case htons(ETH_P_IP): 911 return !!(br->multicast_igmp_version == 3); 912 #if IS_ENABLED(CONFIG_IPV6) 913 case htons(ETH_P_IPV6): 914 return !!(br->multicast_mld_version == 2); 915 #endif 916 default: 917 return false; 918 } 919 } 920 921 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 922 { 923 return BR_INPUT_SKB_CB(skb)->igmp; 924 } 925 926 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 927 { 928 return br->multicast_last_member_interval * 929 br->multicast_last_member_count; 930 } 931 932 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 933 { 934 /* use the RFC default of 2 for QRV */ 935 return 2 * br->multicast_query_interval + 936 br->multicast_query_response_interval; 937 } 938 #else 939 static inline int br_multicast_rcv(struct net_bridge *br, 940 struct net_bridge_port *port, 941 struct sk_buff *skb, 942 u16 vid) 943 { 944 return 0; 945 } 946 947 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 948 struct sk_buff *skb, u16 vid) 949 { 950 return NULL; 951 } 952 953 static inline int br_multicast_add_port(struct net_bridge_port *port) 954 { 955 return 0; 956 } 957 958 static inline void br_multicast_del_port(struct net_bridge_port *port) 959 { 960 } 961 962 static inline void br_multicast_enable_port(struct net_bridge_port *port) 963 { 964 } 965 966 static inline void br_multicast_disable_port(struct net_bridge_port *port) 967 { 968 } 969 970 static inline void br_multicast_init(struct net_bridge *br) 971 { 972 } 973 974 static inline void br_multicast_join_snoopers(struct net_bridge *br) 975 { 976 } 977 978 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 979 { 980 } 981 982 static inline void br_multicast_open(struct net_bridge *br) 983 { 984 } 985 986 static inline void br_multicast_stop(struct net_bridge *br) 987 { 988 } 989 990 static inline void br_multicast_dev_del(struct net_bridge *br) 991 { 992 } 993 994 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 995 struct sk_buff *skb, 996 bool local_rcv, bool local_orig) 997 { 998 } 999 1000 static inline bool br_multicast_is_router(struct net_bridge *br) 1001 { 1002 return false; 1003 } 1004 1005 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1006 struct ethhdr *eth) 1007 { 1008 return false; 1009 } 1010 1011 static inline void br_mdb_init(void) 1012 { 1013 } 1014 1015 static inline void br_mdb_uninit(void) 1016 { 1017 } 1018 1019 static inline int br_mdb_hash_init(struct net_bridge *br) 1020 { 1021 return 0; 1022 } 1023 1024 static inline void br_mdb_hash_fini(struct net_bridge *br) 1025 { 1026 } 1027 1028 static inline void br_multicast_count(struct net_bridge *br, 1029 const struct net_bridge_port *p, 1030 const struct sk_buff *skb, 1031 u8 type, u8 dir) 1032 { 1033 } 1034 1035 static inline int br_multicast_init_stats(struct net_bridge *br) 1036 { 1037 return 0; 1038 } 1039 1040 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1041 { 1042 } 1043 1044 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1045 { 1046 return 0; 1047 } 1048 #endif 1049 1050 /* br_vlan.c */ 1051 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1052 bool br_allowed_ingress(const struct net_bridge *br, 1053 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1054 u16 *vid, u8 *state); 1055 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1056 const struct sk_buff *skb); 1057 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1058 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1059 const struct net_bridge_port *port, 1060 struct net_bridge_vlan_group *vg, 1061 struct sk_buff *skb); 1062 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1063 bool *changed, struct netlink_ext_ack *extack); 1064 int br_vlan_delete(struct net_bridge *br, u16 vid); 1065 void br_vlan_flush(struct net_bridge *br); 1066 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1067 void br_recalculate_fwd_mask(struct net_bridge *br); 1068 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1069 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1070 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1071 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1072 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1073 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1074 int br_vlan_init(struct net_bridge *br); 1075 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1076 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1077 struct netlink_ext_ack *extack); 1078 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1079 bool *changed, struct netlink_ext_ack *extack); 1080 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1081 void nbp_vlan_flush(struct net_bridge_port *port); 1082 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1083 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1084 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1085 struct br_vlan_stats *stats); 1086 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1087 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1088 void *ptr); 1089 void br_vlan_rtnl_init(void); 1090 void br_vlan_rtnl_uninit(void); 1091 void br_vlan_notify(const struct net_bridge *br, 1092 const struct net_bridge_port *p, 1093 u16 vid, u16 vid_range, 1094 int cmd); 1095 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1096 const struct net_bridge_vlan *range_end); 1097 1098 static inline struct net_bridge_vlan_group *br_vlan_group( 1099 const struct net_bridge *br) 1100 { 1101 return rtnl_dereference(br->vlgrp); 1102 } 1103 1104 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1105 const struct net_bridge_port *p) 1106 { 1107 return rtnl_dereference(p->vlgrp); 1108 } 1109 1110 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1111 const struct net_bridge *br) 1112 { 1113 return rcu_dereference(br->vlgrp); 1114 } 1115 1116 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1117 const struct net_bridge_port *p) 1118 { 1119 return rcu_dereference(p->vlgrp); 1120 } 1121 1122 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1123 * skb, the vlan tag will always be present if the frame was tagged. 1124 */ 1125 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1126 { 1127 int err = 0; 1128 1129 if (skb_vlan_tag_present(skb)) { 1130 *vid = skb_vlan_tag_get_id(skb); 1131 } else { 1132 *vid = 0; 1133 err = -EINVAL; 1134 } 1135 1136 return err; 1137 } 1138 1139 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1140 { 1141 if (!vg) 1142 return 0; 1143 1144 smp_rmb(); 1145 return vg->pvid; 1146 } 1147 1148 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1149 { 1150 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1151 } 1152 #else 1153 static inline bool br_allowed_ingress(const struct net_bridge *br, 1154 struct net_bridge_vlan_group *vg, 1155 struct sk_buff *skb, 1156 u16 *vid, u8 *state) 1157 { 1158 return true; 1159 } 1160 1161 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1162 const struct sk_buff *skb) 1163 { 1164 return true; 1165 } 1166 1167 static inline bool br_should_learn(struct net_bridge_port *p, 1168 struct sk_buff *skb, u16 *vid) 1169 { 1170 return true; 1171 } 1172 1173 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1174 const struct net_bridge_port *port, 1175 struct net_bridge_vlan_group *vg, 1176 struct sk_buff *skb) 1177 { 1178 return skb; 1179 } 1180 1181 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1182 bool *changed, struct netlink_ext_ack *extack) 1183 { 1184 *changed = false; 1185 return -EOPNOTSUPP; 1186 } 1187 1188 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1189 { 1190 return -EOPNOTSUPP; 1191 } 1192 1193 static inline void br_vlan_flush(struct net_bridge *br) 1194 { 1195 } 1196 1197 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1198 { 1199 } 1200 1201 static inline int br_vlan_init(struct net_bridge *br) 1202 { 1203 return 0; 1204 } 1205 1206 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1207 bool *changed, struct netlink_ext_ack *extack) 1208 { 1209 *changed = false; 1210 return -EOPNOTSUPP; 1211 } 1212 1213 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1214 { 1215 return -EOPNOTSUPP; 1216 } 1217 1218 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1219 { 1220 } 1221 1222 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1223 u16 vid) 1224 { 1225 return NULL; 1226 } 1227 1228 static inline int nbp_vlan_init(struct net_bridge_port *port, 1229 struct netlink_ext_ack *extack) 1230 { 1231 return 0; 1232 } 1233 1234 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1235 { 1236 return 0; 1237 } 1238 1239 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1240 { 1241 return 0; 1242 } 1243 1244 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1245 unsigned long val) 1246 { 1247 return -EOPNOTSUPP; 1248 } 1249 1250 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1251 u32 filter_mask) 1252 { 1253 return 0; 1254 } 1255 1256 static inline struct net_bridge_vlan_group *br_vlan_group( 1257 const struct net_bridge *br) 1258 { 1259 return NULL; 1260 } 1261 1262 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1263 const struct net_bridge_port *p) 1264 { 1265 return NULL; 1266 } 1267 1268 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1269 const struct net_bridge *br) 1270 { 1271 return NULL; 1272 } 1273 1274 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1275 const struct net_bridge_port *p) 1276 { 1277 return NULL; 1278 } 1279 1280 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1281 struct br_vlan_stats *stats) 1282 { 1283 } 1284 1285 static inline void br_vlan_port_event(struct net_bridge_port *p, 1286 unsigned long event) 1287 { 1288 } 1289 1290 static inline int br_vlan_bridge_event(struct net_device *dev, 1291 unsigned long event, void *ptr) 1292 { 1293 return 0; 1294 } 1295 1296 static inline void br_vlan_rtnl_init(void) 1297 { 1298 } 1299 1300 static inline void br_vlan_rtnl_uninit(void) 1301 { 1302 } 1303 1304 static inline void br_vlan_notify(const struct net_bridge *br, 1305 const struct net_bridge_port *p, 1306 u16 vid, u16 vid_range, 1307 int cmd) 1308 { 1309 } 1310 1311 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1312 const struct net_bridge_vlan *range_end) 1313 { 1314 return true; 1315 } 1316 #endif 1317 1318 /* br_vlan_options.c */ 1319 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1320 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1321 const struct net_bridge_vlan *range_end); 1322 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1323 size_t br_vlan_opts_nl_size(void); 1324 int br_vlan_process_options(const struct net_bridge *br, 1325 const struct net_bridge_port *p, 1326 struct net_bridge_vlan *range_start, 1327 struct net_bridge_vlan *range_end, 1328 struct nlattr **tb, 1329 struct netlink_ext_ack *extack); 1330 1331 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1332 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1333 { 1334 return READ_ONCE(v->state); 1335 } 1336 1337 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1338 { 1339 WRITE_ONCE(v->state, state); 1340 } 1341 1342 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1343 { 1344 return READ_ONCE(vg->pvid_state); 1345 } 1346 1347 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1348 u8 state) 1349 { 1350 WRITE_ONCE(vg->pvid_state, state); 1351 } 1352 1353 /* learn_allow is true at ingress and false at egress */ 1354 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1355 { 1356 switch (state) { 1357 case BR_STATE_LEARNING: 1358 return learn_allow; 1359 case BR_STATE_FORWARDING: 1360 return true; 1361 default: 1362 return false; 1363 } 1364 } 1365 #endif 1366 1367 struct nf_br_ops { 1368 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1369 }; 1370 extern const struct nf_br_ops __rcu *nf_br_ops; 1371 1372 /* br_netfilter.c */ 1373 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1374 int br_nf_core_init(void); 1375 void br_nf_core_fini(void); 1376 void br_netfilter_rtable_init(struct net_bridge *); 1377 #else 1378 static inline int br_nf_core_init(void) { return 0; } 1379 static inline void br_nf_core_fini(void) {} 1380 #define br_netfilter_rtable_init(x) 1381 #endif 1382 1383 /* br_stp.c */ 1384 void br_set_state(struct net_bridge_port *p, unsigned int state); 1385 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1386 void br_init_port(struct net_bridge_port *p); 1387 void br_become_designated_port(struct net_bridge_port *p); 1388 1389 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1390 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1391 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1392 int br_set_max_age(struct net_bridge *br, unsigned long x); 1393 int __set_ageing_time(struct net_device *dev, unsigned long t); 1394 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1395 1396 1397 /* br_stp_if.c */ 1398 void br_stp_enable_bridge(struct net_bridge *br); 1399 void br_stp_disable_bridge(struct net_bridge *br); 1400 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1401 struct netlink_ext_ack *extack); 1402 void br_stp_enable_port(struct net_bridge_port *p); 1403 void br_stp_disable_port(struct net_bridge_port *p); 1404 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1405 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1406 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1407 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1408 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1409 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1410 1411 /* br_stp_bpdu.c */ 1412 struct stp_proto; 1413 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1414 struct net_device *dev); 1415 1416 /* br_stp_timer.c */ 1417 void br_stp_timer_init(struct net_bridge *br); 1418 void br_stp_port_timer_init(struct net_bridge_port *p); 1419 unsigned long br_timer_value(const struct timer_list *timer); 1420 1421 /* br.c */ 1422 #if IS_ENABLED(CONFIG_ATM_LANE) 1423 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1424 #endif 1425 1426 /* br_mrp.c */ 1427 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1428 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1429 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1430 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); 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 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) 1443 { 1444 return 0; 1445 } 1446 1447 static inline bool br_mrp_enabled(struct net_bridge *br) 1448 { 1449 return false; 1450 } 1451 1452 static inline void br_mrp_port_del(struct net_bridge *br, 1453 struct net_bridge_port *p) 1454 { 1455 } 1456 1457 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1458 { 1459 return 0; 1460 } 1461 1462 #endif 1463 1464 /* br_netlink.c */ 1465 extern struct rtnl_link_ops br_link_ops; 1466 int br_netlink_init(void); 1467 void br_netlink_fini(void); 1468 void br_ifinfo_notify(int event, const struct net_bridge *br, 1469 const struct net_bridge_port *port); 1470 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1471 struct netlink_ext_ack *extack); 1472 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1473 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1474 u32 filter_mask, int nlflags); 1475 int br_process_vlan_info(struct net_bridge *br, 1476 struct net_bridge_port *p, int cmd, 1477 struct bridge_vlan_info *vinfo_curr, 1478 struct bridge_vlan_info **vinfo_last, 1479 bool *changed, 1480 struct netlink_ext_ack *extack); 1481 1482 #ifdef CONFIG_SYSFS 1483 /* br_sysfs_if.c */ 1484 extern const struct sysfs_ops brport_sysfs_ops; 1485 int br_sysfs_addif(struct net_bridge_port *p); 1486 int br_sysfs_renameif(struct net_bridge_port *p); 1487 1488 /* br_sysfs_br.c */ 1489 int br_sysfs_addbr(struct net_device *dev); 1490 void br_sysfs_delbr(struct net_device *dev); 1491 1492 #else 1493 1494 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1495 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1496 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1497 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1498 #endif /* CONFIG_SYSFS */ 1499 1500 /* br_switchdev.c */ 1501 #ifdef CONFIG_NET_SWITCHDEV 1502 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1503 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1504 struct sk_buff *skb); 1505 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1506 const struct sk_buff *skb); 1507 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1508 unsigned long flags, 1509 unsigned long mask); 1510 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1511 int type); 1512 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1513 struct netlink_ext_ack *extack); 1514 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1515 1516 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1517 { 1518 skb->offload_fwd_mark = 0; 1519 } 1520 #else 1521 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1522 { 1523 return 0; 1524 } 1525 1526 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1527 struct sk_buff *skb) 1528 { 1529 } 1530 1531 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1532 const struct sk_buff *skb) 1533 { 1534 return true; 1535 } 1536 1537 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1538 unsigned long flags, 1539 unsigned long mask) 1540 { 1541 return 0; 1542 } 1543 1544 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1545 u16 vid, u16 flags, 1546 struct netlink_ext_ack *extack) 1547 { 1548 return -EOPNOTSUPP; 1549 } 1550 1551 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1552 { 1553 return -EOPNOTSUPP; 1554 } 1555 1556 static inline void 1557 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1558 { 1559 } 1560 1561 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1562 { 1563 } 1564 #endif /* CONFIG_NET_SWITCHDEV */ 1565 1566 /* br_arp_nd_proxy.c */ 1567 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1568 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1569 u16 vid, struct net_bridge_port *p); 1570 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1571 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1572 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1573 #endif 1574