1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 struct br_vlan_stats { 93 u64 rx_bytes; 94 u64 rx_packets; 95 u64 tx_bytes; 96 u64 tx_packets; 97 struct u64_stats_sync syncp; 98 }; 99 100 struct br_tunnel_info { 101 __be64 tunnel_id; 102 struct metadata_dst *tunnel_dst; 103 }; 104 105 /* private vlan flags */ 106 enum { 107 BR_VLFLAG_PER_PORT_STATS = BIT(0), 108 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 109 }; 110 111 /** 112 * struct net_bridge_vlan - per-vlan entry 113 * 114 * @vnode: rhashtable member 115 * @vid: VLAN id 116 * @flags: bridge vlan flags 117 * @priv_flags: private (in-kernel) bridge vlan flags 118 * @state: STP state (e.g. blocking, learning, forwarding) 119 * @stats: per-cpu VLAN statistics 120 * @br: if MASTER flag set, this points to a bridge struct 121 * @port: if MASTER flag unset, this points to a port struct 122 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 123 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 124 * for this VLAN entry 125 * @vlist: sorted list of VLAN entries 126 * @rcu: used for entry destruction 127 * 128 * This structure is shared between the global per-VLAN entries contained in 129 * the bridge rhashtable and the local per-port per-VLAN entries contained in 130 * the port's rhashtable. The union entries should be interpreted depending on 131 * the entry flags that are set. 132 */ 133 struct net_bridge_vlan { 134 struct rhash_head vnode; 135 struct rhash_head tnode; 136 u16 vid; 137 u16 flags; 138 u16 priv_flags; 139 u8 state; 140 struct br_vlan_stats __percpu *stats; 141 union { 142 struct net_bridge *br; 143 struct net_bridge_port *port; 144 }; 145 union { 146 refcount_t refcnt; 147 struct net_bridge_vlan *brvlan; 148 }; 149 150 struct br_tunnel_info tinfo; 151 152 struct list_head vlist; 153 154 struct rcu_head rcu; 155 }; 156 157 /** 158 * struct net_bridge_vlan_group 159 * 160 * @vlan_hash: VLAN entry rhashtable 161 * @vlan_list: sorted VLAN entry list 162 * @num_vlans: number of total VLAN entries 163 * @pvid: PVID VLAN id 164 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 165 * 166 * IMPORTANT: Be careful when checking if there're VLAN entries using list 167 * primitives because the bridge can have entries in its list which 168 * are just for global context but not for filtering, i.e. they have 169 * the master flag set but not the brentry flag. If you have to check 170 * if there're "real" entries in the bridge please test @num_vlans 171 */ 172 struct net_bridge_vlan_group { 173 struct rhashtable vlan_hash; 174 struct rhashtable tunnel_hash; 175 struct list_head vlan_list; 176 u16 num_vlans; 177 u16 pvid; 178 u8 pvid_state; 179 }; 180 181 /* bridge fdb flags */ 182 enum { 183 BR_FDB_LOCAL, 184 BR_FDB_STATIC, 185 BR_FDB_STICKY, 186 BR_FDB_ADDED_BY_USER, 187 BR_FDB_ADDED_BY_EXT_LEARN, 188 BR_FDB_OFFLOADED, 189 BR_FDB_NOTIFY, 190 BR_FDB_NOTIFY_INACTIVE 191 }; 192 193 struct net_bridge_fdb_key { 194 mac_addr addr; 195 u16 vlan_id; 196 }; 197 198 struct net_bridge_fdb_entry { 199 struct rhash_head rhnode; 200 struct net_bridge_port *dst; 201 202 struct net_bridge_fdb_key key; 203 struct hlist_node fdb_node; 204 unsigned long flags; 205 206 /* write-heavy members should not affect lookups */ 207 unsigned long updated ____cacheline_aligned_in_smp; 208 unsigned long used; 209 210 struct rcu_head rcu; 211 }; 212 213 #define MDB_PG_FLAGS_PERMANENT BIT(0) 214 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 215 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 216 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 217 #define MDB_PG_FLAGS_BLOCKED BIT(4) 218 219 #define PG_SRC_ENT_LIMIT 32 220 221 #define BR_SGRP_F_DELETE BIT(0) 222 #define BR_SGRP_F_SEND BIT(1) 223 #define BR_SGRP_F_INSTALLED BIT(2) 224 225 struct net_bridge_mcast_gc { 226 struct hlist_node gc_node; 227 void (*destroy)(struct net_bridge_mcast_gc *gc); 228 }; 229 230 struct net_bridge_group_src { 231 struct hlist_node node; 232 233 struct br_ip addr; 234 struct net_bridge_port_group *pg; 235 u8 flags; 236 u8 src_query_rexmit_cnt; 237 struct timer_list timer; 238 239 struct net_bridge *br; 240 struct net_bridge_mcast_gc mcast_gc; 241 struct rcu_head rcu; 242 }; 243 244 struct net_bridge_port_group_sg_key { 245 struct net_bridge_port *port; 246 struct br_ip addr; 247 }; 248 249 struct net_bridge_port_group { 250 struct net_bridge_port_group __rcu *next; 251 struct net_bridge_port_group_sg_key key; 252 unsigned char eth_addr[ETH_ALEN] __aligned(2); 253 unsigned char flags; 254 unsigned char filter_mode; 255 unsigned char grp_query_rexmit_cnt; 256 unsigned char rt_protocol; 257 258 struct hlist_head src_list; 259 unsigned int src_ents; 260 struct timer_list timer; 261 struct timer_list rexmit_timer; 262 struct hlist_node mglist; 263 264 struct rhash_head rhnode; 265 struct net_bridge_mcast_gc mcast_gc; 266 struct rcu_head rcu; 267 }; 268 269 struct net_bridge_mdb_entry { 270 struct rhash_head rhnode; 271 struct net_bridge *br; 272 struct net_bridge_port_group __rcu *ports; 273 struct br_ip addr; 274 bool host_joined; 275 276 struct timer_list timer; 277 struct hlist_node mdb_node; 278 279 struct net_bridge_mcast_gc mcast_gc; 280 struct rcu_head rcu; 281 }; 282 283 struct net_bridge_port { 284 struct net_bridge *br; 285 struct net_device *dev; 286 struct list_head list; 287 288 unsigned long flags; 289 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 290 struct net_bridge_vlan_group __rcu *vlgrp; 291 #endif 292 struct net_bridge_port __rcu *backup_port; 293 294 /* STP */ 295 u8 priority; 296 u8 state; 297 u16 port_no; 298 unsigned char topology_change_ack; 299 unsigned char config_pending; 300 port_id port_id; 301 port_id designated_port; 302 bridge_id designated_root; 303 bridge_id designated_bridge; 304 u32 path_cost; 305 u32 designated_cost; 306 unsigned long designated_age; 307 308 struct timer_list forward_delay_timer; 309 struct timer_list hold_timer; 310 struct timer_list message_age_timer; 311 struct kobject kobj; 312 struct rcu_head rcu; 313 314 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 315 struct bridge_mcast_own_query ip4_own_query; 316 #if IS_ENABLED(CONFIG_IPV6) 317 struct bridge_mcast_own_query ip6_own_query; 318 #endif /* IS_ENABLED(CONFIG_IPV6) */ 319 unsigned char multicast_router; 320 struct bridge_mcast_stats __percpu *mcast_stats; 321 struct timer_list multicast_router_timer; 322 struct hlist_head mglist; 323 struct hlist_node rlist; 324 #endif 325 326 #ifdef CONFIG_SYSFS 327 char sysfs_name[IFNAMSIZ]; 328 #endif 329 330 #ifdef CONFIG_NET_POLL_CONTROLLER 331 struct netpoll *np; 332 #endif 333 #ifdef CONFIG_NET_SWITCHDEV 334 int offload_fwd_mark; 335 #endif 336 u16 group_fwd_mask; 337 u16 backup_redirected_cnt; 338 339 struct bridge_stp_xstats stp_xstats; 340 }; 341 342 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 343 344 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 345 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 346 347 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 348 { 349 return rcu_dereference(dev->rx_handler_data); 350 } 351 352 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 353 { 354 return netif_is_bridge_port(dev) ? 355 rtnl_dereference(dev->rx_handler_data) : NULL; 356 } 357 358 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 359 { 360 return netif_is_bridge_port(dev) ? 361 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 362 } 363 364 enum net_bridge_opts { 365 BROPT_VLAN_ENABLED, 366 BROPT_VLAN_STATS_ENABLED, 367 BROPT_NF_CALL_IPTABLES, 368 BROPT_NF_CALL_IP6TABLES, 369 BROPT_NF_CALL_ARPTABLES, 370 BROPT_GROUP_ADDR_SET, 371 BROPT_MULTICAST_ENABLED, 372 BROPT_MULTICAST_QUERIER, 373 BROPT_MULTICAST_QUERY_USE_IFADDR, 374 BROPT_MULTICAST_STATS_ENABLED, 375 BROPT_HAS_IPV6_ADDR, 376 BROPT_NEIGH_SUPPRESS_ENABLED, 377 BROPT_MTU_SET_BY_USER, 378 BROPT_VLAN_STATS_PER_PORT, 379 BROPT_NO_LL_LEARN, 380 BROPT_VLAN_BRIDGE_BINDING, 381 }; 382 383 struct net_bridge { 384 spinlock_t lock; 385 spinlock_t hash_lock; 386 struct hlist_head frame_type_list; 387 struct net_device *dev; 388 struct pcpu_sw_netstats __percpu *stats; 389 unsigned long options; 390 /* These fields are accessed on each packet */ 391 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 392 __be16 vlan_proto; 393 u16 default_pvid; 394 struct net_bridge_vlan_group __rcu *vlgrp; 395 #endif 396 397 struct rhashtable fdb_hash_tbl; 398 struct list_head port_list; 399 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 400 union { 401 struct rtable fake_rtable; 402 struct rt6_info fake_rt6_info; 403 }; 404 #endif 405 u16 group_fwd_mask; 406 u16 group_fwd_mask_required; 407 408 /* STP */ 409 bridge_id designated_root; 410 bridge_id bridge_id; 411 unsigned char topology_change; 412 unsigned char topology_change_detected; 413 u16 root_port; 414 unsigned long max_age; 415 unsigned long hello_time; 416 unsigned long forward_delay; 417 unsigned long ageing_time; 418 unsigned long bridge_max_age; 419 unsigned long bridge_hello_time; 420 unsigned long bridge_forward_delay; 421 unsigned long bridge_ageing_time; 422 u32 root_path_cost; 423 424 u8 group_addr[ETH_ALEN]; 425 426 enum { 427 BR_NO_STP, /* no spanning tree */ 428 BR_KERNEL_STP, /* old STP in kernel */ 429 BR_USER_STP, /* new RSTP in userspace */ 430 } stp_enabled; 431 432 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 433 434 u32 hash_max; 435 436 u32 multicast_last_member_count; 437 u32 multicast_startup_query_count; 438 439 u8 multicast_igmp_version; 440 u8 multicast_router; 441 #if IS_ENABLED(CONFIG_IPV6) 442 u8 multicast_mld_version; 443 #endif 444 spinlock_t multicast_lock; 445 unsigned long multicast_last_member_interval; 446 unsigned long multicast_membership_interval; 447 unsigned long multicast_querier_interval; 448 unsigned long multicast_query_interval; 449 unsigned long multicast_query_response_interval; 450 unsigned long multicast_startup_query_interval; 451 452 struct rhashtable mdb_hash_tbl; 453 struct rhashtable sg_port_tbl; 454 455 struct hlist_head mcast_gc_list; 456 struct hlist_head mdb_list; 457 struct hlist_head router_list; 458 459 struct timer_list multicast_router_timer; 460 struct bridge_mcast_other_query ip4_other_query; 461 struct bridge_mcast_own_query ip4_own_query; 462 struct bridge_mcast_querier ip4_querier; 463 struct bridge_mcast_stats __percpu *mcast_stats; 464 #if IS_ENABLED(CONFIG_IPV6) 465 struct bridge_mcast_other_query ip6_other_query; 466 struct bridge_mcast_own_query ip6_own_query; 467 struct bridge_mcast_querier ip6_querier; 468 #endif /* IS_ENABLED(CONFIG_IPV6) */ 469 struct work_struct mcast_gc_work; 470 #endif 471 472 struct timer_list hello_timer; 473 struct timer_list tcn_timer; 474 struct timer_list topology_change_timer; 475 struct delayed_work gc_work; 476 struct kobject *ifobj; 477 u32 auto_cnt; 478 479 #ifdef CONFIG_NET_SWITCHDEV 480 int offload_fwd_mark; 481 #endif 482 struct hlist_head fdb_list; 483 484 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 485 struct list_head mrp_list; 486 #endif 487 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 488 struct hlist_head mep_list; 489 #endif 490 }; 491 492 struct br_input_skb_cb { 493 struct net_device *brdev; 494 495 u16 frag_max_size; 496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 497 u8 igmp; 498 u8 mrouters_only:1; 499 #endif 500 u8 proxyarp_replied:1; 501 u8 src_port_isolated:1; 502 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 503 u8 vlan_filtered:1; 504 #endif 505 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 506 u8 br_netfilter_broute:1; 507 #endif 508 509 #ifdef CONFIG_NET_SWITCHDEV 510 int offload_fwd_mark; 511 #endif 512 }; 513 514 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 515 516 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 517 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 518 #else 519 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 520 #endif 521 522 #define br_printk(level, br, format, args...) \ 523 printk(level "%s: " format, (br)->dev->name, ##args) 524 525 #define br_err(__br, format, args...) \ 526 br_printk(KERN_ERR, __br, format, ##args) 527 #define br_warn(__br, format, args...) \ 528 br_printk(KERN_WARNING, __br, format, ##args) 529 #define br_notice(__br, format, args...) \ 530 br_printk(KERN_NOTICE, __br, format, ##args) 531 #define br_info(__br, format, args...) \ 532 br_printk(KERN_INFO, __br, format, ##args) 533 534 #define br_debug(br, format, args...) \ 535 pr_debug("%s: " format, (br)->dev->name, ##args) 536 537 /* called under bridge lock */ 538 static inline int br_is_root_bridge(const struct net_bridge *br) 539 { 540 return !memcmp(&br->bridge_id, &br->designated_root, 8); 541 } 542 543 /* check if a VLAN entry is global */ 544 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 545 { 546 return v->flags & BRIDGE_VLAN_INFO_MASTER; 547 } 548 549 /* check if a VLAN entry is used by the bridge */ 550 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 551 { 552 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 553 } 554 555 /* check if we should use the vlan entry, returns false if it's only context */ 556 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 557 { 558 if (br_vlan_is_master(v)) { 559 if (br_vlan_is_brentry(v)) 560 return true; 561 else 562 return false; 563 } 564 565 return true; 566 } 567 568 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 569 { 570 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 571 } 572 573 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 574 { 575 bool ret = vid > 0 && vid < VLAN_VID_MASK; 576 577 if (!ret) 578 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 579 580 return ret; 581 } 582 583 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 584 const struct bridge_vlan_info *last, 585 struct netlink_ext_ack *extack) 586 { 587 /* pvid flag is not allowed in ranges */ 588 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 589 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 590 return false; 591 } 592 593 /* when cur is the range end, check if: 594 * - it has range start flag 595 * - range ids are invalid (end is equal to or before start) 596 */ 597 if (last) { 598 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 599 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 600 return false; 601 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 602 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 603 return false; 604 } else if (cur->vid <= last->vid) { 605 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 606 return false; 607 } 608 } 609 610 /* check for required range flags */ 611 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 612 BRIDGE_VLAN_INFO_RANGE_END))) { 613 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 614 return false; 615 } 616 617 return true; 618 } 619 620 static inline int br_afspec_cmd_to_rtm(int cmd) 621 { 622 switch (cmd) { 623 case RTM_SETLINK: 624 return RTM_NEWVLAN; 625 case RTM_DELLINK: 626 return RTM_DELVLAN; 627 } 628 629 return 0; 630 } 631 632 static inline int br_opt_get(const struct net_bridge *br, 633 enum net_bridge_opts opt) 634 { 635 return test_bit(opt, &br->options); 636 } 637 638 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 639 struct netlink_ext_ack *extack); 640 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 641 int br_boolopt_multi_toggle(struct net_bridge *br, 642 struct br_boolopt_multi *bm, 643 struct netlink_ext_ack *extack); 644 void br_boolopt_multi_get(const struct net_bridge *br, 645 struct br_boolopt_multi *bm); 646 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 647 648 /* br_device.c */ 649 void br_dev_setup(struct net_device *dev); 650 void br_dev_delete(struct net_device *dev, struct list_head *list); 651 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 652 #ifdef CONFIG_NET_POLL_CONTROLLER 653 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 654 struct sk_buff *skb) 655 { 656 netpoll_send_skb(p->np, skb); 657 } 658 659 int br_netpoll_enable(struct net_bridge_port *p); 660 void br_netpoll_disable(struct net_bridge_port *p); 661 #else 662 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 663 struct sk_buff *skb) 664 { 665 } 666 667 static inline int br_netpoll_enable(struct net_bridge_port *p) 668 { 669 return 0; 670 } 671 672 static inline void br_netpoll_disable(struct net_bridge_port *p) 673 { 674 } 675 #endif 676 677 /* br_fdb.c */ 678 int br_fdb_init(void); 679 void br_fdb_fini(void); 680 int br_fdb_hash_init(struct net_bridge *br); 681 void br_fdb_hash_fini(struct net_bridge *br); 682 void br_fdb_flush(struct net_bridge *br); 683 void br_fdb_find_delete_local(struct net_bridge *br, 684 const struct net_bridge_port *p, 685 const unsigned char *addr, u16 vid); 686 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 687 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 688 void br_fdb_cleanup(struct work_struct *work); 689 void br_fdb_delete_by_port(struct net_bridge *br, 690 const struct net_bridge_port *p, u16 vid, int do_all); 691 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 692 const unsigned char *addr, 693 __u16 vid); 694 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 695 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 696 unsigned long off); 697 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 698 const unsigned char *addr, u16 vid); 699 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 700 const unsigned char *addr, u16 vid, unsigned long flags); 701 702 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 703 struct net_device *dev, const unsigned char *addr, u16 vid); 704 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 705 const unsigned char *addr, u16 vid, u16 nlh_flags, 706 struct netlink_ext_ack *extack); 707 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 708 struct net_device *dev, struct net_device *fdev, int *idx); 709 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 710 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 711 struct netlink_ext_ack *extack); 712 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 713 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 714 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 715 const unsigned char *addr, u16 vid, 716 bool swdev_notify); 717 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 718 const unsigned char *addr, u16 vid, 719 bool swdev_notify); 720 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 721 const unsigned char *addr, u16 vid, bool offloaded); 722 723 /* br_forward.c */ 724 enum br_pkt_type { 725 BR_PKT_UNICAST, 726 BR_PKT_MULTICAST, 727 BR_PKT_BROADCAST 728 }; 729 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 730 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 731 bool local_rcv, bool local_orig); 732 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 733 void br_flood(struct net_bridge *br, struct sk_buff *skb, 734 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 735 736 /* return true if both source port and dest port are isolated */ 737 static inline bool br_skb_isolated(const struct net_bridge_port *to, 738 const struct sk_buff *skb) 739 { 740 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 741 (to->flags & BR_ISOLATED); 742 } 743 744 /* br_if.c */ 745 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 746 int br_add_bridge(struct net *net, const char *name); 747 int br_del_bridge(struct net *net, const char *name); 748 int br_add_if(struct net_bridge *br, struct net_device *dev, 749 struct netlink_ext_ack *extack); 750 int br_del_if(struct net_bridge *br, struct net_device *dev); 751 void br_mtu_auto_adjust(struct net_bridge *br); 752 netdev_features_t br_features_recompute(struct net_bridge *br, 753 netdev_features_t features); 754 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 755 void br_manage_promisc(struct net_bridge *br); 756 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 757 758 /* br_input.c */ 759 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 760 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 761 762 struct br_frame_type { 763 __be16 type; 764 int (*frame_handler)(struct net_bridge_port *port, 765 struct sk_buff *skb); 766 struct hlist_node list; 767 }; 768 769 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 770 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 771 772 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 773 { 774 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 775 } 776 777 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 778 { 779 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 780 } 781 782 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 783 { 784 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 785 } 786 787 static inline struct net_bridge_port * 788 br_port_get_check_rtnl(const struct net_device *dev) 789 { 790 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 791 } 792 793 /* br_ioctl.c */ 794 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 795 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 796 void __user *arg); 797 798 /* br_multicast.c */ 799 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 800 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 801 struct sk_buff *skb, u16 vid); 802 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 803 struct sk_buff *skb, u16 vid); 804 int br_multicast_add_port(struct net_bridge_port *port); 805 void br_multicast_del_port(struct net_bridge_port *port); 806 void br_multicast_enable_port(struct net_bridge_port *port); 807 void br_multicast_disable_port(struct net_bridge_port *port); 808 void br_multicast_init(struct net_bridge *br); 809 void br_multicast_open(struct net_bridge *br); 810 void br_multicast_stop(struct net_bridge *br); 811 void br_multicast_dev_del(struct net_bridge *br); 812 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 813 struct sk_buff *skb, bool local_rcv, bool local_orig); 814 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 815 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 816 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 817 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 818 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 819 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 820 #if IS_ENABLED(CONFIG_IPV6) 821 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 822 #endif 823 struct net_bridge_mdb_entry * 824 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 825 struct net_bridge_mdb_entry * 826 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 827 struct net_bridge_port_group * 828 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 829 struct net_bridge_port_group __rcu *next, 830 unsigned char flags, const unsigned char *src, 831 u8 filter_mode, u8 rt_protocol); 832 int br_mdb_hash_init(struct net_bridge *br); 833 void br_mdb_hash_fini(struct net_bridge *br); 834 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 835 struct net_bridge_port_group *pg, int type); 836 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 837 int type); 838 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 839 struct net_bridge_port_group *pg, 840 struct net_bridge_port_group __rcu **pp); 841 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 842 const struct sk_buff *skb, u8 type, u8 dir); 843 int br_multicast_init_stats(struct net_bridge *br); 844 void br_multicast_uninit_stats(struct net_bridge *br); 845 void br_multicast_get_stats(const struct net_bridge *br, 846 const struct net_bridge_port *p, 847 struct br_mcast_stats *dest); 848 void br_mdb_init(void); 849 void br_mdb_uninit(void); 850 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 851 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 852 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 853 u8 filter_mode); 854 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 855 struct net_bridge_port_group *sg); 856 857 static inline bool br_group_is_l2(const struct br_ip *group) 858 { 859 return group->proto == 0; 860 } 861 862 #define mlock_dereference(X, br) \ 863 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 864 865 static inline bool br_multicast_is_router(struct net_bridge *br) 866 { 867 return br->multicast_router == 2 || 868 (br->multicast_router == 1 && 869 timer_pending(&br->multicast_router_timer)); 870 } 871 872 static inline bool 873 __br_multicast_querier_exists(struct net_bridge *br, 874 struct bridge_mcast_other_query *querier, 875 const bool is_ipv6) 876 { 877 bool own_querier_enabled; 878 879 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 880 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 881 own_querier_enabled = false; 882 else 883 own_querier_enabled = true; 884 } else { 885 own_querier_enabled = false; 886 } 887 888 return time_is_before_jiffies(querier->delay_time) && 889 (own_querier_enabled || timer_pending(&querier->timer)); 890 } 891 892 static inline bool br_multicast_querier_exists(struct net_bridge *br, 893 struct ethhdr *eth, 894 const struct net_bridge_mdb_entry *mdb) 895 { 896 switch (eth->h_proto) { 897 case (htons(ETH_P_IP)): 898 return __br_multicast_querier_exists(br, 899 &br->ip4_other_query, false); 900 #if IS_ENABLED(CONFIG_IPV6) 901 case (htons(ETH_P_IPV6)): 902 return __br_multicast_querier_exists(br, 903 &br->ip6_other_query, true); 904 #endif 905 default: 906 return !!mdb && br_group_is_l2(&mdb->addr); 907 } 908 } 909 910 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 911 { 912 switch (ip->proto) { 913 case htons(ETH_P_IP): 914 return ipv4_is_zeronet(ip->src.ip4); 915 #if IS_ENABLED(CONFIG_IPV6) 916 case htons(ETH_P_IPV6): 917 return ipv6_addr_any(&ip->src.ip6); 918 #endif 919 default: 920 return false; 921 } 922 } 923 924 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 925 __be16 proto) 926 { 927 switch (proto) { 928 case htons(ETH_P_IP): 929 return !!(br->multicast_igmp_version == 3); 930 #if IS_ENABLED(CONFIG_IPV6) 931 case htons(ETH_P_IPV6): 932 return !!(br->multicast_mld_version == 2); 933 #endif 934 default: 935 return false; 936 } 937 } 938 939 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 940 { 941 return BR_INPUT_SKB_CB(skb)->igmp; 942 } 943 944 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 945 { 946 return br->multicast_last_member_interval * 947 br->multicast_last_member_count; 948 } 949 950 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 951 { 952 /* use the RFC default of 2 for QRV */ 953 return 2 * br->multicast_query_interval + 954 br->multicast_query_response_interval; 955 } 956 #else 957 static inline int br_multicast_rcv(struct net_bridge *br, 958 struct net_bridge_port *port, 959 struct sk_buff *skb, 960 u16 vid) 961 { 962 return 0; 963 } 964 965 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 966 struct sk_buff *skb, u16 vid) 967 { 968 return NULL; 969 } 970 971 static inline int br_multicast_add_port(struct net_bridge_port *port) 972 { 973 return 0; 974 } 975 976 static inline void br_multicast_del_port(struct net_bridge_port *port) 977 { 978 } 979 980 static inline void br_multicast_enable_port(struct net_bridge_port *port) 981 { 982 } 983 984 static inline void br_multicast_disable_port(struct net_bridge_port *port) 985 { 986 } 987 988 static inline void br_multicast_init(struct net_bridge *br) 989 { 990 } 991 992 static inline void br_multicast_open(struct net_bridge *br) 993 { 994 } 995 996 static inline void br_multicast_stop(struct net_bridge *br) 997 { 998 } 999 1000 static inline void br_multicast_dev_del(struct net_bridge *br) 1001 { 1002 } 1003 1004 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1005 struct sk_buff *skb, 1006 bool local_rcv, bool local_orig) 1007 { 1008 } 1009 1010 static inline bool br_multicast_is_router(struct net_bridge *br) 1011 { 1012 return false; 1013 } 1014 1015 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1016 struct ethhdr *eth, 1017 const struct net_bridge_mdb_entry *mdb) 1018 { 1019 return false; 1020 } 1021 1022 static inline void br_mdb_init(void) 1023 { 1024 } 1025 1026 static inline void br_mdb_uninit(void) 1027 { 1028 } 1029 1030 static inline int br_mdb_hash_init(struct net_bridge *br) 1031 { 1032 return 0; 1033 } 1034 1035 static inline void br_mdb_hash_fini(struct net_bridge *br) 1036 { 1037 } 1038 1039 static inline void br_multicast_count(struct net_bridge *br, 1040 const struct net_bridge_port *p, 1041 const struct sk_buff *skb, 1042 u8 type, u8 dir) 1043 { 1044 } 1045 1046 static inline int br_multicast_init_stats(struct net_bridge *br) 1047 { 1048 return 0; 1049 } 1050 1051 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1052 { 1053 } 1054 1055 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1056 { 1057 return 0; 1058 } 1059 #endif 1060 1061 /* br_vlan.c */ 1062 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1063 bool br_allowed_ingress(const struct net_bridge *br, 1064 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1065 u16 *vid, u8 *state); 1066 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1067 const struct sk_buff *skb); 1068 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1069 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1070 const struct net_bridge_port *port, 1071 struct net_bridge_vlan_group *vg, 1072 struct sk_buff *skb); 1073 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1074 bool *changed, struct netlink_ext_ack *extack); 1075 int br_vlan_delete(struct net_bridge *br, u16 vid); 1076 void br_vlan_flush(struct net_bridge *br); 1077 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1078 void br_recalculate_fwd_mask(struct net_bridge *br); 1079 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1080 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1081 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1082 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1083 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1084 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1085 int br_vlan_init(struct net_bridge *br); 1086 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1087 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1088 struct netlink_ext_ack *extack); 1089 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1090 bool *changed, struct netlink_ext_ack *extack); 1091 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1092 void nbp_vlan_flush(struct net_bridge_port *port); 1093 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1094 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1095 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1096 struct br_vlan_stats *stats); 1097 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1098 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1099 void *ptr); 1100 void br_vlan_rtnl_init(void); 1101 void br_vlan_rtnl_uninit(void); 1102 void br_vlan_notify(const struct net_bridge *br, 1103 const struct net_bridge_port *p, 1104 u16 vid, u16 vid_range, 1105 int cmd); 1106 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1107 const struct net_bridge_vlan *range_end); 1108 1109 static inline struct net_bridge_vlan_group *br_vlan_group( 1110 const struct net_bridge *br) 1111 { 1112 return rtnl_dereference(br->vlgrp); 1113 } 1114 1115 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1116 const struct net_bridge_port *p) 1117 { 1118 return rtnl_dereference(p->vlgrp); 1119 } 1120 1121 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1122 const struct net_bridge *br) 1123 { 1124 return rcu_dereference(br->vlgrp); 1125 } 1126 1127 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1128 const struct net_bridge_port *p) 1129 { 1130 return rcu_dereference(p->vlgrp); 1131 } 1132 1133 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1134 * skb, the vlan tag will always be present if the frame was tagged. 1135 */ 1136 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1137 { 1138 int err = 0; 1139 1140 if (skb_vlan_tag_present(skb)) { 1141 *vid = skb_vlan_tag_get_id(skb); 1142 } else { 1143 *vid = 0; 1144 err = -EINVAL; 1145 } 1146 1147 return err; 1148 } 1149 1150 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1151 { 1152 if (!vg) 1153 return 0; 1154 1155 smp_rmb(); 1156 return vg->pvid; 1157 } 1158 1159 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1160 { 1161 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1162 } 1163 #else 1164 static inline bool br_allowed_ingress(const struct net_bridge *br, 1165 struct net_bridge_vlan_group *vg, 1166 struct sk_buff *skb, 1167 u16 *vid, u8 *state) 1168 { 1169 return true; 1170 } 1171 1172 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1173 const struct sk_buff *skb) 1174 { 1175 return true; 1176 } 1177 1178 static inline bool br_should_learn(struct net_bridge_port *p, 1179 struct sk_buff *skb, u16 *vid) 1180 { 1181 return true; 1182 } 1183 1184 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1185 const struct net_bridge_port *port, 1186 struct net_bridge_vlan_group *vg, 1187 struct sk_buff *skb) 1188 { 1189 return skb; 1190 } 1191 1192 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1193 bool *changed, struct netlink_ext_ack *extack) 1194 { 1195 *changed = false; 1196 return -EOPNOTSUPP; 1197 } 1198 1199 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1200 { 1201 return -EOPNOTSUPP; 1202 } 1203 1204 static inline void br_vlan_flush(struct net_bridge *br) 1205 { 1206 } 1207 1208 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1209 { 1210 } 1211 1212 static inline int br_vlan_init(struct net_bridge *br) 1213 { 1214 return 0; 1215 } 1216 1217 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1218 bool *changed, struct netlink_ext_ack *extack) 1219 { 1220 *changed = false; 1221 return -EOPNOTSUPP; 1222 } 1223 1224 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1225 { 1226 return -EOPNOTSUPP; 1227 } 1228 1229 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1230 { 1231 } 1232 1233 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1234 u16 vid) 1235 { 1236 return NULL; 1237 } 1238 1239 static inline int nbp_vlan_init(struct net_bridge_port *port, 1240 struct netlink_ext_ack *extack) 1241 { 1242 return 0; 1243 } 1244 1245 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1246 { 1247 return 0; 1248 } 1249 1250 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1251 { 1252 return 0; 1253 } 1254 1255 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1256 unsigned long val) 1257 { 1258 return -EOPNOTSUPP; 1259 } 1260 1261 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1262 u32 filter_mask) 1263 { 1264 return 0; 1265 } 1266 1267 static inline struct net_bridge_vlan_group *br_vlan_group( 1268 const struct net_bridge *br) 1269 { 1270 return NULL; 1271 } 1272 1273 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1274 const struct net_bridge_port *p) 1275 { 1276 return NULL; 1277 } 1278 1279 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1280 const struct net_bridge *br) 1281 { 1282 return NULL; 1283 } 1284 1285 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1286 const struct net_bridge_port *p) 1287 { 1288 return NULL; 1289 } 1290 1291 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1292 struct br_vlan_stats *stats) 1293 { 1294 } 1295 1296 static inline void br_vlan_port_event(struct net_bridge_port *p, 1297 unsigned long event) 1298 { 1299 } 1300 1301 static inline int br_vlan_bridge_event(struct net_device *dev, 1302 unsigned long event, void *ptr) 1303 { 1304 return 0; 1305 } 1306 1307 static inline void br_vlan_rtnl_init(void) 1308 { 1309 } 1310 1311 static inline void br_vlan_rtnl_uninit(void) 1312 { 1313 } 1314 1315 static inline void br_vlan_notify(const struct net_bridge *br, 1316 const struct net_bridge_port *p, 1317 u16 vid, u16 vid_range, 1318 int cmd) 1319 { 1320 } 1321 1322 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1323 const struct net_bridge_vlan *range_end) 1324 { 1325 return true; 1326 } 1327 #endif 1328 1329 /* br_vlan_options.c */ 1330 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1331 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1332 const struct net_bridge_vlan *range_end); 1333 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1334 size_t br_vlan_opts_nl_size(void); 1335 int br_vlan_process_options(const struct net_bridge *br, 1336 const struct net_bridge_port *p, 1337 struct net_bridge_vlan *range_start, 1338 struct net_bridge_vlan *range_end, 1339 struct nlattr **tb, 1340 struct netlink_ext_ack *extack); 1341 1342 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1343 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1344 { 1345 return READ_ONCE(v->state); 1346 } 1347 1348 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1349 { 1350 WRITE_ONCE(v->state, state); 1351 } 1352 1353 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1354 { 1355 return READ_ONCE(vg->pvid_state); 1356 } 1357 1358 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1359 u8 state) 1360 { 1361 WRITE_ONCE(vg->pvid_state, state); 1362 } 1363 1364 /* learn_allow is true at ingress and false at egress */ 1365 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1366 { 1367 switch (state) { 1368 case BR_STATE_LEARNING: 1369 return learn_allow; 1370 case BR_STATE_FORWARDING: 1371 return true; 1372 default: 1373 return false; 1374 } 1375 } 1376 #endif 1377 1378 struct nf_br_ops { 1379 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1380 }; 1381 extern const struct nf_br_ops __rcu *nf_br_ops; 1382 1383 /* br_netfilter.c */ 1384 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1385 int br_nf_core_init(void); 1386 void br_nf_core_fini(void); 1387 void br_netfilter_rtable_init(struct net_bridge *); 1388 #else 1389 static inline int br_nf_core_init(void) { return 0; } 1390 static inline void br_nf_core_fini(void) {} 1391 #define br_netfilter_rtable_init(x) 1392 #endif 1393 1394 /* br_stp.c */ 1395 void br_set_state(struct net_bridge_port *p, unsigned int state); 1396 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1397 void br_init_port(struct net_bridge_port *p); 1398 void br_become_designated_port(struct net_bridge_port *p); 1399 1400 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1401 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1402 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1403 int br_set_max_age(struct net_bridge *br, unsigned long x); 1404 int __set_ageing_time(struct net_device *dev, unsigned long t); 1405 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1406 1407 1408 /* br_stp_if.c */ 1409 void br_stp_enable_bridge(struct net_bridge *br); 1410 void br_stp_disable_bridge(struct net_bridge *br); 1411 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1412 struct netlink_ext_ack *extack); 1413 void br_stp_enable_port(struct net_bridge_port *p); 1414 void br_stp_disable_port(struct net_bridge_port *p); 1415 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1416 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1417 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1418 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1419 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1420 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1421 1422 /* br_stp_bpdu.c */ 1423 struct stp_proto; 1424 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1425 struct net_device *dev); 1426 1427 /* br_stp_timer.c */ 1428 void br_stp_timer_init(struct net_bridge *br); 1429 void br_stp_port_timer_init(struct net_bridge_port *p); 1430 unsigned long br_timer_value(const struct timer_list *timer); 1431 1432 /* br.c */ 1433 #if IS_ENABLED(CONFIG_ATM_LANE) 1434 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1435 #endif 1436 1437 /* br_mrp.c */ 1438 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1439 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1440 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1441 bool br_mrp_enabled(struct net_bridge *br); 1442 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1443 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1444 #else 1445 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1446 struct nlattr *attr, int cmd, 1447 struct netlink_ext_ack *extack) 1448 { 1449 return -EOPNOTSUPP; 1450 } 1451 1452 static inline bool br_mrp_enabled(struct net_bridge *br) 1453 { 1454 return false; 1455 } 1456 1457 static inline void br_mrp_port_del(struct net_bridge *br, 1458 struct net_bridge_port *p) 1459 { 1460 } 1461 1462 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1463 { 1464 return 0; 1465 } 1466 1467 #endif 1468 1469 /* br_cfm.c */ 1470 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1471 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1472 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1473 bool br_cfm_created(struct net_bridge *br); 1474 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1475 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1476 int br_cfm_status_fill_info(struct sk_buff *skb, 1477 struct net_bridge *br, 1478 bool getlink); 1479 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1480 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1481 #else 1482 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1483 struct nlattr *attr, int cmd, 1484 struct netlink_ext_ack *extack) 1485 { 1486 return -EOPNOTSUPP; 1487 } 1488 1489 static inline bool br_cfm_created(struct net_bridge *br) 1490 { 1491 return false; 1492 } 1493 1494 static inline void br_cfm_port_del(struct net_bridge *br, 1495 struct net_bridge_port *p) 1496 { 1497 } 1498 1499 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1500 { 1501 return -EOPNOTSUPP; 1502 } 1503 1504 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1505 struct net_bridge *br, 1506 bool getlink) 1507 { 1508 return -EOPNOTSUPP; 1509 } 1510 1511 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1512 { 1513 return -EOPNOTSUPP; 1514 } 1515 1516 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1517 { 1518 return -EOPNOTSUPP; 1519 } 1520 #endif 1521 1522 /* br_netlink.c */ 1523 extern struct rtnl_link_ops br_link_ops; 1524 int br_netlink_init(void); 1525 void br_netlink_fini(void); 1526 void br_ifinfo_notify(int event, const struct net_bridge *br, 1527 const struct net_bridge_port *port); 1528 void br_info_notify(int event, const struct net_bridge *br, 1529 const struct net_bridge_port *port, u32 filter); 1530 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1531 struct netlink_ext_ack *extack); 1532 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1533 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1534 u32 filter_mask, int nlflags); 1535 int br_process_vlan_info(struct net_bridge *br, 1536 struct net_bridge_port *p, int cmd, 1537 struct bridge_vlan_info *vinfo_curr, 1538 struct bridge_vlan_info **vinfo_last, 1539 bool *changed, 1540 struct netlink_ext_ack *extack); 1541 1542 #ifdef CONFIG_SYSFS 1543 /* br_sysfs_if.c */ 1544 extern const struct sysfs_ops brport_sysfs_ops; 1545 int br_sysfs_addif(struct net_bridge_port *p); 1546 int br_sysfs_renameif(struct net_bridge_port *p); 1547 1548 /* br_sysfs_br.c */ 1549 int br_sysfs_addbr(struct net_device *dev); 1550 void br_sysfs_delbr(struct net_device *dev); 1551 1552 #else 1553 1554 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1555 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1556 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1557 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1558 #endif /* CONFIG_SYSFS */ 1559 1560 /* br_switchdev.c */ 1561 #ifdef CONFIG_NET_SWITCHDEV 1562 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1563 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1564 struct sk_buff *skb); 1565 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1566 const struct sk_buff *skb); 1567 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1568 unsigned long flags, 1569 unsigned long mask); 1570 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1571 int type); 1572 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1573 struct netlink_ext_ack *extack); 1574 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1575 1576 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1577 { 1578 skb->offload_fwd_mark = 0; 1579 } 1580 #else 1581 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1582 { 1583 return 0; 1584 } 1585 1586 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1587 struct sk_buff *skb) 1588 { 1589 } 1590 1591 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1592 const struct sk_buff *skb) 1593 { 1594 return true; 1595 } 1596 1597 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1598 unsigned long flags, 1599 unsigned long mask) 1600 { 1601 return 0; 1602 } 1603 1604 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1605 u16 vid, u16 flags, 1606 struct netlink_ext_ack *extack) 1607 { 1608 return -EOPNOTSUPP; 1609 } 1610 1611 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1612 { 1613 return -EOPNOTSUPP; 1614 } 1615 1616 static inline void 1617 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1618 { 1619 } 1620 1621 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1622 { 1623 } 1624 #endif /* CONFIG_NET_SWITCHDEV */ 1625 1626 /* br_arp_nd_proxy.c */ 1627 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1628 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1629 u16 vid, struct net_bridge_port *p); 1630 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1631 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1632 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1633 #endif 1634