1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 struct br_tunnel_info { 93 __be64 tunnel_id; 94 struct metadata_dst *tunnel_dst; 95 }; 96 97 /* private vlan flags */ 98 enum { 99 BR_VLFLAG_PER_PORT_STATS = BIT(0), 100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 101 }; 102 103 /** 104 * struct net_bridge_vlan - per-vlan entry 105 * 106 * @vnode: rhashtable member 107 * @vid: VLAN id 108 * @flags: bridge vlan flags 109 * @priv_flags: private (in-kernel) bridge vlan flags 110 * @state: STP state (e.g. blocking, learning, forwarding) 111 * @stats: per-cpu VLAN statistics 112 * @br: if MASTER flag set, this points to a bridge struct 113 * @port: if MASTER flag unset, this points to a port struct 114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 116 * for this VLAN entry 117 * @vlist: sorted list of VLAN entries 118 * @rcu: used for entry destruction 119 * 120 * This structure is shared between the global per-VLAN entries contained in 121 * the bridge rhashtable and the local per-port per-VLAN entries contained in 122 * the port's rhashtable. The union entries should be interpreted depending on 123 * the entry flags that are set. 124 */ 125 struct net_bridge_vlan { 126 struct rhash_head vnode; 127 struct rhash_head tnode; 128 u16 vid; 129 u16 flags; 130 u16 priv_flags; 131 u8 state; 132 struct pcpu_sw_netstats __percpu *stats; 133 union { 134 struct net_bridge *br; 135 struct net_bridge_port *port; 136 }; 137 union { 138 refcount_t refcnt; 139 struct net_bridge_vlan *brvlan; 140 }; 141 142 struct br_tunnel_info tinfo; 143 144 struct list_head vlist; 145 146 struct rcu_head rcu; 147 }; 148 149 /** 150 * struct net_bridge_vlan_group 151 * 152 * @vlan_hash: VLAN entry rhashtable 153 * @vlan_list: sorted VLAN entry list 154 * @num_vlans: number of total VLAN entries 155 * @pvid: PVID VLAN id 156 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 157 * 158 * IMPORTANT: Be careful when checking if there're VLAN entries using list 159 * primitives because the bridge can have entries in its list which 160 * are just for global context but not for filtering, i.e. they have 161 * the master flag set but not the brentry flag. If you have to check 162 * if there're "real" entries in the bridge please test @num_vlans 163 */ 164 struct net_bridge_vlan_group { 165 struct rhashtable vlan_hash; 166 struct rhashtable tunnel_hash; 167 struct list_head vlan_list; 168 u16 num_vlans; 169 u16 pvid; 170 u8 pvid_state; 171 }; 172 173 /* bridge fdb flags */ 174 enum { 175 BR_FDB_LOCAL, 176 BR_FDB_STATIC, 177 BR_FDB_STICKY, 178 BR_FDB_ADDED_BY_USER, 179 BR_FDB_ADDED_BY_EXT_LEARN, 180 BR_FDB_OFFLOADED, 181 BR_FDB_NOTIFY, 182 BR_FDB_NOTIFY_INACTIVE 183 }; 184 185 struct net_bridge_fdb_key { 186 mac_addr addr; 187 u16 vlan_id; 188 }; 189 190 struct net_bridge_fdb_entry { 191 struct rhash_head rhnode; 192 struct net_bridge_port *dst; 193 194 struct net_bridge_fdb_key key; 195 struct hlist_node fdb_node; 196 unsigned long flags; 197 198 /* write-heavy members should not affect lookups */ 199 unsigned long updated ____cacheline_aligned_in_smp; 200 unsigned long used; 201 202 struct rcu_head rcu; 203 }; 204 205 #define MDB_PG_FLAGS_PERMANENT BIT(0) 206 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 208 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 209 #define MDB_PG_FLAGS_BLOCKED BIT(4) 210 211 #define PG_SRC_ENT_LIMIT 32 212 213 #define BR_SGRP_F_DELETE BIT(0) 214 #define BR_SGRP_F_SEND BIT(1) 215 #define BR_SGRP_F_INSTALLED BIT(2) 216 217 struct net_bridge_mcast_gc { 218 struct hlist_node gc_node; 219 void (*destroy)(struct net_bridge_mcast_gc *gc); 220 }; 221 222 struct net_bridge_group_src { 223 struct hlist_node node; 224 225 struct br_ip addr; 226 struct net_bridge_port_group *pg; 227 u8 flags; 228 u8 src_query_rexmit_cnt; 229 struct timer_list timer; 230 231 struct net_bridge *br; 232 struct net_bridge_mcast_gc mcast_gc; 233 struct rcu_head rcu; 234 }; 235 236 struct net_bridge_port_group_sg_key { 237 struct net_bridge_port *port; 238 struct br_ip addr; 239 }; 240 241 struct net_bridge_port_group { 242 struct net_bridge_port_group __rcu *next; 243 struct net_bridge_port_group_sg_key key; 244 unsigned char eth_addr[ETH_ALEN] __aligned(2); 245 unsigned char flags; 246 unsigned char filter_mode; 247 unsigned char grp_query_rexmit_cnt; 248 unsigned char rt_protocol; 249 250 struct hlist_head src_list; 251 unsigned int src_ents; 252 struct timer_list timer; 253 struct timer_list rexmit_timer; 254 struct hlist_node mglist; 255 struct rb_root eht_set_tree; 256 struct rb_root eht_host_tree; 257 258 struct rhash_head rhnode; 259 struct net_bridge_mcast_gc mcast_gc; 260 struct rcu_head rcu; 261 }; 262 263 struct net_bridge_mdb_entry { 264 struct rhash_head rhnode; 265 struct net_bridge *br; 266 struct net_bridge_port_group __rcu *ports; 267 struct br_ip addr; 268 bool host_joined; 269 270 struct timer_list timer; 271 struct hlist_node mdb_node; 272 273 struct net_bridge_mcast_gc mcast_gc; 274 struct rcu_head rcu; 275 }; 276 277 struct net_bridge_port { 278 struct net_bridge *br; 279 struct net_device *dev; 280 struct list_head list; 281 282 unsigned long flags; 283 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 284 struct net_bridge_vlan_group __rcu *vlgrp; 285 #endif 286 struct net_bridge_port __rcu *backup_port; 287 288 /* STP */ 289 u8 priority; 290 u8 state; 291 u16 port_no; 292 unsigned char topology_change_ack; 293 unsigned char config_pending; 294 port_id port_id; 295 port_id designated_port; 296 bridge_id designated_root; 297 bridge_id designated_bridge; 298 u32 path_cost; 299 u32 designated_cost; 300 unsigned long designated_age; 301 302 struct timer_list forward_delay_timer; 303 struct timer_list hold_timer; 304 struct timer_list message_age_timer; 305 struct kobject kobj; 306 struct rcu_head rcu; 307 308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 309 struct bridge_mcast_own_query ip4_own_query; 310 #if IS_ENABLED(CONFIG_IPV6) 311 struct bridge_mcast_own_query ip6_own_query; 312 #endif /* IS_ENABLED(CONFIG_IPV6) */ 313 unsigned char multicast_router; 314 struct bridge_mcast_stats __percpu *mcast_stats; 315 struct timer_list multicast_router_timer; 316 struct hlist_head mglist; 317 struct hlist_node rlist; 318 #endif 319 320 #ifdef CONFIG_SYSFS 321 char sysfs_name[IFNAMSIZ]; 322 #endif 323 324 #ifdef CONFIG_NET_POLL_CONTROLLER 325 struct netpoll *np; 326 #endif 327 #ifdef CONFIG_NET_SWITCHDEV 328 int offload_fwd_mark; 329 #endif 330 u16 group_fwd_mask; 331 u16 backup_redirected_cnt; 332 333 struct bridge_stp_xstats stp_xstats; 334 }; 335 336 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 337 338 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 339 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 340 341 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 342 { 343 return rcu_dereference(dev->rx_handler_data); 344 } 345 346 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 347 { 348 return netif_is_bridge_port(dev) ? 349 rtnl_dereference(dev->rx_handler_data) : NULL; 350 } 351 352 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 353 { 354 return netif_is_bridge_port(dev) ? 355 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 356 } 357 358 enum net_bridge_opts { 359 BROPT_VLAN_ENABLED, 360 BROPT_VLAN_STATS_ENABLED, 361 BROPT_NF_CALL_IPTABLES, 362 BROPT_NF_CALL_IP6TABLES, 363 BROPT_NF_CALL_ARPTABLES, 364 BROPT_GROUP_ADDR_SET, 365 BROPT_MULTICAST_ENABLED, 366 BROPT_MULTICAST_QUERIER, 367 BROPT_MULTICAST_QUERY_USE_IFADDR, 368 BROPT_MULTICAST_STATS_ENABLED, 369 BROPT_HAS_IPV6_ADDR, 370 BROPT_NEIGH_SUPPRESS_ENABLED, 371 BROPT_MTU_SET_BY_USER, 372 BROPT_VLAN_STATS_PER_PORT, 373 BROPT_NO_LL_LEARN, 374 BROPT_VLAN_BRIDGE_BINDING, 375 }; 376 377 struct net_bridge { 378 spinlock_t lock; 379 spinlock_t hash_lock; 380 struct hlist_head frame_type_list; 381 struct net_device *dev; 382 unsigned long options; 383 /* These fields are accessed on each packet */ 384 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 385 __be16 vlan_proto; 386 u16 default_pvid; 387 struct net_bridge_vlan_group __rcu *vlgrp; 388 #endif 389 390 struct rhashtable fdb_hash_tbl; 391 struct list_head port_list; 392 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 393 union { 394 struct rtable fake_rtable; 395 struct rt6_info fake_rt6_info; 396 }; 397 #endif 398 u16 group_fwd_mask; 399 u16 group_fwd_mask_required; 400 401 /* STP */ 402 bridge_id designated_root; 403 bridge_id bridge_id; 404 unsigned char topology_change; 405 unsigned char topology_change_detected; 406 u16 root_port; 407 unsigned long max_age; 408 unsigned long hello_time; 409 unsigned long forward_delay; 410 unsigned long ageing_time; 411 unsigned long bridge_max_age; 412 unsigned long bridge_hello_time; 413 unsigned long bridge_forward_delay; 414 unsigned long bridge_ageing_time; 415 u32 root_path_cost; 416 417 u8 group_addr[ETH_ALEN]; 418 419 enum { 420 BR_NO_STP, /* no spanning tree */ 421 BR_KERNEL_STP, /* old STP in kernel */ 422 BR_USER_STP, /* new RSTP in userspace */ 423 } stp_enabled; 424 425 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 426 427 u32 hash_max; 428 429 u32 multicast_last_member_count; 430 u32 multicast_startup_query_count; 431 432 u8 multicast_igmp_version; 433 u8 multicast_router; 434 #if IS_ENABLED(CONFIG_IPV6) 435 u8 multicast_mld_version; 436 #endif 437 spinlock_t multicast_lock; 438 unsigned long multicast_last_member_interval; 439 unsigned long multicast_membership_interval; 440 unsigned long multicast_querier_interval; 441 unsigned long multicast_query_interval; 442 unsigned long multicast_query_response_interval; 443 unsigned long multicast_startup_query_interval; 444 445 struct rhashtable mdb_hash_tbl; 446 struct rhashtable sg_port_tbl; 447 448 struct hlist_head mcast_gc_list; 449 struct hlist_head mdb_list; 450 struct hlist_head router_list; 451 452 struct timer_list multicast_router_timer; 453 struct bridge_mcast_other_query ip4_other_query; 454 struct bridge_mcast_own_query ip4_own_query; 455 struct bridge_mcast_querier ip4_querier; 456 struct bridge_mcast_stats __percpu *mcast_stats; 457 #if IS_ENABLED(CONFIG_IPV6) 458 struct bridge_mcast_other_query ip6_other_query; 459 struct bridge_mcast_own_query ip6_own_query; 460 struct bridge_mcast_querier ip6_querier; 461 #endif /* IS_ENABLED(CONFIG_IPV6) */ 462 struct work_struct mcast_gc_work; 463 #endif 464 465 struct timer_list hello_timer; 466 struct timer_list tcn_timer; 467 struct timer_list topology_change_timer; 468 struct delayed_work gc_work; 469 struct kobject *ifobj; 470 u32 auto_cnt; 471 472 #ifdef CONFIG_NET_SWITCHDEV 473 int offload_fwd_mark; 474 #endif 475 struct hlist_head fdb_list; 476 477 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 478 struct hlist_head mrp_list; 479 #endif 480 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 481 struct hlist_head mep_list; 482 #endif 483 }; 484 485 struct br_input_skb_cb { 486 struct net_device *brdev; 487 488 u16 frag_max_size; 489 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 490 u8 igmp; 491 u8 mrouters_only:1; 492 #endif 493 u8 proxyarp_replied:1; 494 u8 src_port_isolated:1; 495 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 496 u8 vlan_filtered:1; 497 #endif 498 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 499 u8 br_netfilter_broute:1; 500 #endif 501 502 #ifdef CONFIG_NET_SWITCHDEV 503 int offload_fwd_mark; 504 #endif 505 }; 506 507 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 508 509 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 510 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 511 #else 512 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 513 #endif 514 515 #define br_printk(level, br, format, args...) \ 516 printk(level "%s: " format, (br)->dev->name, ##args) 517 518 #define br_err(__br, format, args...) \ 519 br_printk(KERN_ERR, __br, format, ##args) 520 #define br_warn(__br, format, args...) \ 521 br_printk(KERN_WARNING, __br, format, ##args) 522 #define br_notice(__br, format, args...) \ 523 br_printk(KERN_NOTICE, __br, format, ##args) 524 #define br_info(__br, format, args...) \ 525 br_printk(KERN_INFO, __br, format, ##args) 526 527 #define br_debug(br, format, args...) \ 528 pr_debug("%s: " format, (br)->dev->name, ##args) 529 530 /* called under bridge lock */ 531 static inline int br_is_root_bridge(const struct net_bridge *br) 532 { 533 return !memcmp(&br->bridge_id, &br->designated_root, 8); 534 } 535 536 /* check if a VLAN entry is global */ 537 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 538 { 539 return v->flags & BRIDGE_VLAN_INFO_MASTER; 540 } 541 542 /* check if a VLAN entry is used by the bridge */ 543 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 544 { 545 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 546 } 547 548 /* check if we should use the vlan entry, returns false if it's only context */ 549 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 550 { 551 if (br_vlan_is_master(v)) { 552 if (br_vlan_is_brentry(v)) 553 return true; 554 else 555 return false; 556 } 557 558 return true; 559 } 560 561 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 562 { 563 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 564 } 565 566 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 567 { 568 bool ret = vid > 0 && vid < VLAN_VID_MASK; 569 570 if (!ret) 571 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 572 573 return ret; 574 } 575 576 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 577 const struct bridge_vlan_info *last, 578 struct netlink_ext_ack *extack) 579 { 580 /* pvid flag is not allowed in ranges */ 581 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 582 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 583 return false; 584 } 585 586 /* when cur is the range end, check if: 587 * - it has range start flag 588 * - range ids are invalid (end is equal to or before start) 589 */ 590 if (last) { 591 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 592 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 593 return false; 594 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 595 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 596 return false; 597 } else if (cur->vid <= last->vid) { 598 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 599 return false; 600 } 601 } 602 603 /* check for required range flags */ 604 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 605 BRIDGE_VLAN_INFO_RANGE_END))) { 606 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 607 return false; 608 } 609 610 return true; 611 } 612 613 static inline int br_afspec_cmd_to_rtm(int cmd) 614 { 615 switch (cmd) { 616 case RTM_SETLINK: 617 return RTM_NEWVLAN; 618 case RTM_DELLINK: 619 return RTM_DELVLAN; 620 } 621 622 return 0; 623 } 624 625 static inline int br_opt_get(const struct net_bridge *br, 626 enum net_bridge_opts opt) 627 { 628 return test_bit(opt, &br->options); 629 } 630 631 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 632 struct netlink_ext_ack *extack); 633 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 634 int br_boolopt_multi_toggle(struct net_bridge *br, 635 struct br_boolopt_multi *bm, 636 struct netlink_ext_ack *extack); 637 void br_boolopt_multi_get(const struct net_bridge *br, 638 struct br_boolopt_multi *bm); 639 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 640 641 /* br_device.c */ 642 void br_dev_setup(struct net_device *dev); 643 void br_dev_delete(struct net_device *dev, struct list_head *list); 644 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 645 #ifdef CONFIG_NET_POLL_CONTROLLER 646 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 647 struct sk_buff *skb) 648 { 649 netpoll_send_skb(p->np, skb); 650 } 651 652 int br_netpoll_enable(struct net_bridge_port *p); 653 void br_netpoll_disable(struct net_bridge_port *p); 654 #else 655 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 656 struct sk_buff *skb) 657 { 658 } 659 660 static inline int br_netpoll_enable(struct net_bridge_port *p) 661 { 662 return 0; 663 } 664 665 static inline void br_netpoll_disable(struct net_bridge_port *p) 666 { 667 } 668 #endif 669 670 /* br_fdb.c */ 671 int br_fdb_init(void); 672 void br_fdb_fini(void); 673 int br_fdb_hash_init(struct net_bridge *br); 674 void br_fdb_hash_fini(struct net_bridge *br); 675 void br_fdb_flush(struct net_bridge *br); 676 void br_fdb_find_delete_local(struct net_bridge *br, 677 const struct net_bridge_port *p, 678 const unsigned char *addr, u16 vid); 679 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 680 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 681 void br_fdb_cleanup(struct work_struct *work); 682 void br_fdb_delete_by_port(struct net_bridge *br, 683 const struct net_bridge_port *p, u16 vid, int do_all); 684 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 685 const unsigned char *addr, 686 __u16 vid); 687 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 688 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 689 unsigned long off); 690 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 691 const unsigned char *addr, u16 vid); 692 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 693 const unsigned char *addr, u16 vid, unsigned long flags); 694 695 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 696 struct net_device *dev, const unsigned char *addr, u16 vid); 697 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 698 const unsigned char *addr, u16 vid, u16 nlh_flags, 699 struct netlink_ext_ack *extack); 700 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 701 struct net_device *dev, struct net_device *fdev, int *idx); 702 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 703 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 704 struct netlink_ext_ack *extack); 705 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 706 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 707 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 708 const unsigned char *addr, u16 vid, 709 bool swdev_notify); 710 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 711 const unsigned char *addr, u16 vid, 712 bool swdev_notify); 713 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 714 const unsigned char *addr, u16 vid, bool offloaded); 715 716 /* br_forward.c */ 717 enum br_pkt_type { 718 BR_PKT_UNICAST, 719 BR_PKT_MULTICAST, 720 BR_PKT_BROADCAST 721 }; 722 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 723 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 724 bool local_rcv, bool local_orig); 725 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 726 void br_flood(struct net_bridge *br, struct sk_buff *skb, 727 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 728 729 /* return true if both source port and dest port are isolated */ 730 static inline bool br_skb_isolated(const struct net_bridge_port *to, 731 const struct sk_buff *skb) 732 { 733 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 734 (to->flags & BR_ISOLATED); 735 } 736 737 /* br_if.c */ 738 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 739 int br_add_bridge(struct net *net, const char *name); 740 int br_del_bridge(struct net *net, const char *name); 741 int br_add_if(struct net_bridge *br, struct net_device *dev, 742 struct netlink_ext_ack *extack); 743 int br_del_if(struct net_bridge *br, struct net_device *dev); 744 void br_mtu_auto_adjust(struct net_bridge *br); 745 netdev_features_t br_features_recompute(struct net_bridge *br, 746 netdev_features_t features); 747 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 748 void br_manage_promisc(struct net_bridge *br); 749 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 750 751 /* br_input.c */ 752 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 753 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 754 755 struct br_frame_type { 756 __be16 type; 757 int (*frame_handler)(struct net_bridge_port *port, 758 struct sk_buff *skb); 759 struct hlist_node list; 760 }; 761 762 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 763 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 764 765 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 766 { 767 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 768 } 769 770 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 771 { 772 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 773 } 774 775 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 776 { 777 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 778 } 779 780 static inline struct net_bridge_port * 781 br_port_get_check_rtnl(const struct net_device *dev) 782 { 783 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 784 } 785 786 /* br_ioctl.c */ 787 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 788 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 789 void __user *arg); 790 791 /* br_multicast.c */ 792 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 793 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 794 struct sk_buff *skb, u16 vid); 795 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 796 struct sk_buff *skb, u16 vid); 797 int br_multicast_add_port(struct net_bridge_port *port); 798 void br_multicast_del_port(struct net_bridge_port *port); 799 void br_multicast_enable_port(struct net_bridge_port *port); 800 void br_multicast_disable_port(struct net_bridge_port *port); 801 void br_multicast_init(struct net_bridge *br); 802 void br_multicast_join_snoopers(struct net_bridge *br); 803 void br_multicast_leave_snoopers(struct net_bridge *br); 804 void br_multicast_open(struct net_bridge *br); 805 void br_multicast_stop(struct net_bridge *br); 806 void br_multicast_dev_del(struct net_bridge *br); 807 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 808 struct sk_buff *skb, bool local_rcv, bool local_orig); 809 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 810 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 811 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 812 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 813 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 814 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 815 #if IS_ENABLED(CONFIG_IPV6) 816 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 817 #endif 818 struct net_bridge_mdb_entry * 819 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 820 struct net_bridge_mdb_entry * 821 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 822 struct net_bridge_port_group * 823 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 824 struct net_bridge_port_group __rcu *next, 825 unsigned char flags, const unsigned char *src, 826 u8 filter_mode, u8 rt_protocol); 827 int br_mdb_hash_init(struct net_bridge *br); 828 void br_mdb_hash_fini(struct net_bridge *br); 829 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 830 struct net_bridge_port_group *pg, int type); 831 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 832 int type); 833 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 834 struct net_bridge_port_group *pg, 835 struct net_bridge_port_group __rcu **pp); 836 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 837 const struct sk_buff *skb, u8 type, u8 dir); 838 int br_multicast_init_stats(struct net_bridge *br); 839 void br_multicast_uninit_stats(struct net_bridge *br); 840 void br_multicast_get_stats(const struct net_bridge *br, 841 const struct net_bridge_port *p, 842 struct br_mcast_stats *dest); 843 void br_mdb_init(void); 844 void br_mdb_uninit(void); 845 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 846 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 847 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 848 u8 filter_mode); 849 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 850 struct net_bridge_port_group *sg); 851 struct net_bridge_group_src * 852 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 853 void br_multicast_del_group_src(struct net_bridge_group_src *src, 854 bool fastleave); 855 856 static inline bool br_group_is_l2(const struct br_ip *group) 857 { 858 return group->proto == 0; 859 } 860 861 #define mlock_dereference(X, br) \ 862 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 863 864 static inline bool br_multicast_is_router(struct net_bridge *br) 865 { 866 return br->multicast_router == 2 || 867 (br->multicast_router == 1 && 868 timer_pending(&br->multicast_router_timer)); 869 } 870 871 static inline bool 872 __br_multicast_querier_exists(struct net_bridge *br, 873 struct bridge_mcast_other_query *querier, 874 const bool is_ipv6) 875 { 876 bool own_querier_enabled; 877 878 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 879 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 880 own_querier_enabled = false; 881 else 882 own_querier_enabled = true; 883 } else { 884 own_querier_enabled = false; 885 } 886 887 return time_is_before_jiffies(querier->delay_time) && 888 (own_querier_enabled || timer_pending(&querier->timer)); 889 } 890 891 static inline bool br_multicast_querier_exists(struct net_bridge *br, 892 struct ethhdr *eth, 893 const struct net_bridge_mdb_entry *mdb) 894 { 895 switch (eth->h_proto) { 896 case (htons(ETH_P_IP)): 897 return __br_multicast_querier_exists(br, 898 &br->ip4_other_query, false); 899 #if IS_ENABLED(CONFIG_IPV6) 900 case (htons(ETH_P_IPV6)): 901 return __br_multicast_querier_exists(br, 902 &br->ip6_other_query, true); 903 #endif 904 default: 905 return !!mdb && br_group_is_l2(&mdb->addr); 906 } 907 } 908 909 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 910 { 911 switch (ip->proto) { 912 case htons(ETH_P_IP): 913 return ipv4_is_zeronet(ip->src.ip4); 914 #if IS_ENABLED(CONFIG_IPV6) 915 case htons(ETH_P_IPV6): 916 return ipv6_addr_any(&ip->src.ip6); 917 #endif 918 default: 919 return false; 920 } 921 } 922 923 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 924 __be16 proto) 925 { 926 switch (proto) { 927 case htons(ETH_P_IP): 928 return !!(br->multicast_igmp_version == 3); 929 #if IS_ENABLED(CONFIG_IPV6) 930 case htons(ETH_P_IPV6): 931 return !!(br->multicast_mld_version == 2); 932 #endif 933 default: 934 return false; 935 } 936 } 937 938 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 939 { 940 return BR_INPUT_SKB_CB(skb)->igmp; 941 } 942 943 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 944 { 945 return br->multicast_last_member_interval * 946 br->multicast_last_member_count; 947 } 948 949 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 950 { 951 /* use the RFC default of 2 for QRV */ 952 return 2 * br->multicast_query_interval + 953 br->multicast_query_response_interval; 954 } 955 #else 956 static inline int br_multicast_rcv(struct net_bridge *br, 957 struct net_bridge_port *port, 958 struct sk_buff *skb, 959 u16 vid) 960 { 961 return 0; 962 } 963 964 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 965 struct sk_buff *skb, u16 vid) 966 { 967 return NULL; 968 } 969 970 static inline int br_multicast_add_port(struct net_bridge_port *port) 971 { 972 return 0; 973 } 974 975 static inline void br_multicast_del_port(struct net_bridge_port *port) 976 { 977 } 978 979 static inline void br_multicast_enable_port(struct net_bridge_port *port) 980 { 981 } 982 983 static inline void br_multicast_disable_port(struct net_bridge_port *port) 984 { 985 } 986 987 static inline void br_multicast_init(struct net_bridge *br) 988 { 989 } 990 991 static inline void br_multicast_join_snoopers(struct net_bridge *br) 992 { 993 } 994 995 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 996 { 997 } 998 999 static inline void br_multicast_open(struct net_bridge *br) 1000 { 1001 } 1002 1003 static inline void br_multicast_stop(struct net_bridge *br) 1004 { 1005 } 1006 1007 static inline void br_multicast_dev_del(struct net_bridge *br) 1008 { 1009 } 1010 1011 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1012 struct sk_buff *skb, 1013 bool local_rcv, bool local_orig) 1014 { 1015 } 1016 1017 static inline bool br_multicast_is_router(struct net_bridge *br) 1018 { 1019 return false; 1020 } 1021 1022 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1023 struct ethhdr *eth, 1024 const struct net_bridge_mdb_entry *mdb) 1025 { 1026 return false; 1027 } 1028 1029 static inline void br_mdb_init(void) 1030 { 1031 } 1032 1033 static inline void br_mdb_uninit(void) 1034 { 1035 } 1036 1037 static inline int br_mdb_hash_init(struct net_bridge *br) 1038 { 1039 return 0; 1040 } 1041 1042 static inline void br_mdb_hash_fini(struct net_bridge *br) 1043 { 1044 } 1045 1046 static inline void br_multicast_count(struct net_bridge *br, 1047 const struct net_bridge_port *p, 1048 const struct sk_buff *skb, 1049 u8 type, u8 dir) 1050 { 1051 } 1052 1053 static inline int br_multicast_init_stats(struct net_bridge *br) 1054 { 1055 return 0; 1056 } 1057 1058 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1059 { 1060 } 1061 1062 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1063 { 1064 return 0; 1065 } 1066 #endif 1067 1068 /* br_vlan.c */ 1069 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1070 bool br_allowed_ingress(const struct net_bridge *br, 1071 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1072 u16 *vid, u8 *state); 1073 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1074 const struct sk_buff *skb); 1075 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1076 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1077 const struct net_bridge_port *port, 1078 struct net_bridge_vlan_group *vg, 1079 struct sk_buff *skb); 1080 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1081 bool *changed, struct netlink_ext_ack *extack); 1082 int br_vlan_delete(struct net_bridge *br, u16 vid); 1083 void br_vlan_flush(struct net_bridge *br); 1084 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1085 void br_recalculate_fwd_mask(struct net_bridge *br); 1086 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1087 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1088 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1089 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1090 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1091 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1092 int br_vlan_init(struct net_bridge *br); 1093 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1094 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1095 struct netlink_ext_ack *extack); 1096 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1097 bool *changed, struct netlink_ext_ack *extack); 1098 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1099 void nbp_vlan_flush(struct net_bridge_port *port); 1100 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1101 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1102 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1103 struct pcpu_sw_netstats *stats); 1104 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1105 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1106 void *ptr); 1107 void br_vlan_rtnl_init(void); 1108 void br_vlan_rtnl_uninit(void); 1109 void br_vlan_notify(const struct net_bridge *br, 1110 const struct net_bridge_port *p, 1111 u16 vid, u16 vid_range, 1112 int cmd); 1113 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1114 const struct net_bridge_vlan *range_end); 1115 1116 static inline struct net_bridge_vlan_group *br_vlan_group( 1117 const struct net_bridge *br) 1118 { 1119 return rtnl_dereference(br->vlgrp); 1120 } 1121 1122 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1123 const struct net_bridge_port *p) 1124 { 1125 return rtnl_dereference(p->vlgrp); 1126 } 1127 1128 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1129 const struct net_bridge *br) 1130 { 1131 return rcu_dereference(br->vlgrp); 1132 } 1133 1134 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1135 const struct net_bridge_port *p) 1136 { 1137 return rcu_dereference(p->vlgrp); 1138 } 1139 1140 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1141 * skb, the vlan tag will always be present if the frame was tagged. 1142 */ 1143 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1144 { 1145 int err = 0; 1146 1147 if (skb_vlan_tag_present(skb)) { 1148 *vid = skb_vlan_tag_get_id(skb); 1149 } else { 1150 *vid = 0; 1151 err = -EINVAL; 1152 } 1153 1154 return err; 1155 } 1156 1157 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1158 { 1159 if (!vg) 1160 return 0; 1161 1162 smp_rmb(); 1163 return vg->pvid; 1164 } 1165 1166 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1167 { 1168 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1169 } 1170 #else 1171 static inline bool br_allowed_ingress(const struct net_bridge *br, 1172 struct net_bridge_vlan_group *vg, 1173 struct sk_buff *skb, 1174 u16 *vid, u8 *state) 1175 { 1176 return true; 1177 } 1178 1179 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1180 const struct sk_buff *skb) 1181 { 1182 return true; 1183 } 1184 1185 static inline bool br_should_learn(struct net_bridge_port *p, 1186 struct sk_buff *skb, u16 *vid) 1187 { 1188 return true; 1189 } 1190 1191 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1192 const struct net_bridge_port *port, 1193 struct net_bridge_vlan_group *vg, 1194 struct sk_buff *skb) 1195 { 1196 return skb; 1197 } 1198 1199 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1200 bool *changed, struct netlink_ext_ack *extack) 1201 { 1202 *changed = false; 1203 return -EOPNOTSUPP; 1204 } 1205 1206 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1207 { 1208 return -EOPNOTSUPP; 1209 } 1210 1211 static inline void br_vlan_flush(struct net_bridge *br) 1212 { 1213 } 1214 1215 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1216 { 1217 } 1218 1219 static inline int br_vlan_init(struct net_bridge *br) 1220 { 1221 return 0; 1222 } 1223 1224 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1225 bool *changed, struct netlink_ext_ack *extack) 1226 { 1227 *changed = false; 1228 return -EOPNOTSUPP; 1229 } 1230 1231 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1232 { 1233 return -EOPNOTSUPP; 1234 } 1235 1236 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1237 { 1238 } 1239 1240 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1241 u16 vid) 1242 { 1243 return NULL; 1244 } 1245 1246 static inline int nbp_vlan_init(struct net_bridge_port *port, 1247 struct netlink_ext_ack *extack) 1248 { 1249 return 0; 1250 } 1251 1252 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1253 { 1254 return 0; 1255 } 1256 1257 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1258 { 1259 return 0; 1260 } 1261 1262 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1263 unsigned long val) 1264 { 1265 return -EOPNOTSUPP; 1266 } 1267 1268 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1269 u32 filter_mask) 1270 { 1271 return 0; 1272 } 1273 1274 static inline struct net_bridge_vlan_group *br_vlan_group( 1275 const struct net_bridge *br) 1276 { 1277 return NULL; 1278 } 1279 1280 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1281 const struct net_bridge_port *p) 1282 { 1283 return NULL; 1284 } 1285 1286 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1287 const struct net_bridge *br) 1288 { 1289 return NULL; 1290 } 1291 1292 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1293 const struct net_bridge_port *p) 1294 { 1295 return NULL; 1296 } 1297 1298 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1299 struct pcpu_sw_netstats *stats) 1300 { 1301 } 1302 1303 static inline void br_vlan_port_event(struct net_bridge_port *p, 1304 unsigned long event) 1305 { 1306 } 1307 1308 static inline int br_vlan_bridge_event(struct net_device *dev, 1309 unsigned long event, void *ptr) 1310 { 1311 return 0; 1312 } 1313 1314 static inline void br_vlan_rtnl_init(void) 1315 { 1316 } 1317 1318 static inline void br_vlan_rtnl_uninit(void) 1319 { 1320 } 1321 1322 static inline void br_vlan_notify(const struct net_bridge *br, 1323 const struct net_bridge_port *p, 1324 u16 vid, u16 vid_range, 1325 int cmd) 1326 { 1327 } 1328 1329 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1330 const struct net_bridge_vlan *range_end) 1331 { 1332 return true; 1333 } 1334 #endif 1335 1336 /* br_vlan_options.c */ 1337 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1338 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1339 const struct net_bridge_vlan *range_end); 1340 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1341 size_t br_vlan_opts_nl_size(void); 1342 int br_vlan_process_options(const struct net_bridge *br, 1343 const struct net_bridge_port *p, 1344 struct net_bridge_vlan *range_start, 1345 struct net_bridge_vlan *range_end, 1346 struct nlattr **tb, 1347 struct netlink_ext_ack *extack); 1348 1349 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1350 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1351 { 1352 return READ_ONCE(v->state); 1353 } 1354 1355 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1356 { 1357 WRITE_ONCE(v->state, state); 1358 } 1359 1360 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1361 { 1362 return READ_ONCE(vg->pvid_state); 1363 } 1364 1365 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1366 u8 state) 1367 { 1368 WRITE_ONCE(vg->pvid_state, state); 1369 } 1370 1371 /* learn_allow is true at ingress and false at egress */ 1372 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1373 { 1374 switch (state) { 1375 case BR_STATE_LEARNING: 1376 return learn_allow; 1377 case BR_STATE_FORWARDING: 1378 return true; 1379 default: 1380 return false; 1381 } 1382 } 1383 #endif 1384 1385 struct nf_br_ops { 1386 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1387 }; 1388 extern const struct nf_br_ops __rcu *nf_br_ops; 1389 1390 /* br_netfilter.c */ 1391 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1392 int br_nf_core_init(void); 1393 void br_nf_core_fini(void); 1394 void br_netfilter_rtable_init(struct net_bridge *); 1395 #else 1396 static inline int br_nf_core_init(void) { return 0; } 1397 static inline void br_nf_core_fini(void) {} 1398 #define br_netfilter_rtable_init(x) 1399 #endif 1400 1401 /* br_stp.c */ 1402 void br_set_state(struct net_bridge_port *p, unsigned int state); 1403 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1404 void br_init_port(struct net_bridge_port *p); 1405 void br_become_designated_port(struct net_bridge_port *p); 1406 1407 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1408 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1409 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1410 int br_set_max_age(struct net_bridge *br, unsigned long x); 1411 int __set_ageing_time(struct net_device *dev, unsigned long t); 1412 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1413 1414 1415 /* br_stp_if.c */ 1416 void br_stp_enable_bridge(struct net_bridge *br); 1417 void br_stp_disable_bridge(struct net_bridge *br); 1418 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1419 struct netlink_ext_ack *extack); 1420 void br_stp_enable_port(struct net_bridge_port *p); 1421 void br_stp_disable_port(struct net_bridge_port *p); 1422 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1423 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1424 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1425 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1426 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1427 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1428 1429 /* br_stp_bpdu.c */ 1430 struct stp_proto; 1431 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1432 struct net_device *dev); 1433 1434 /* br_stp_timer.c */ 1435 void br_stp_timer_init(struct net_bridge *br); 1436 void br_stp_port_timer_init(struct net_bridge_port *p); 1437 unsigned long br_timer_value(const struct timer_list *timer); 1438 1439 /* br.c */ 1440 #if IS_ENABLED(CONFIG_ATM_LANE) 1441 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1442 #endif 1443 1444 /* br_mrp.c */ 1445 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1446 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1447 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1448 bool br_mrp_enabled(struct net_bridge *br); 1449 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1450 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1451 #else 1452 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1453 struct nlattr *attr, int cmd, 1454 struct netlink_ext_ack *extack) 1455 { 1456 return -EOPNOTSUPP; 1457 } 1458 1459 static inline bool br_mrp_enabled(struct net_bridge *br) 1460 { 1461 return false; 1462 } 1463 1464 static inline void br_mrp_port_del(struct net_bridge *br, 1465 struct net_bridge_port *p) 1466 { 1467 } 1468 1469 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1470 { 1471 return 0; 1472 } 1473 1474 #endif 1475 1476 /* br_cfm.c */ 1477 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1478 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1479 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1480 bool br_cfm_created(struct net_bridge *br); 1481 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1482 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1483 int br_cfm_status_fill_info(struct sk_buff *skb, 1484 struct net_bridge *br, 1485 bool getlink); 1486 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1487 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1488 #else 1489 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1490 struct nlattr *attr, int cmd, 1491 struct netlink_ext_ack *extack) 1492 { 1493 return -EOPNOTSUPP; 1494 } 1495 1496 static inline bool br_cfm_created(struct net_bridge *br) 1497 { 1498 return false; 1499 } 1500 1501 static inline void br_cfm_port_del(struct net_bridge *br, 1502 struct net_bridge_port *p) 1503 { 1504 } 1505 1506 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1507 { 1508 return -EOPNOTSUPP; 1509 } 1510 1511 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1512 struct net_bridge *br, 1513 bool getlink) 1514 { 1515 return -EOPNOTSUPP; 1516 } 1517 1518 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1519 { 1520 return -EOPNOTSUPP; 1521 } 1522 1523 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1524 { 1525 return -EOPNOTSUPP; 1526 } 1527 #endif 1528 1529 /* br_netlink.c */ 1530 extern struct rtnl_link_ops br_link_ops; 1531 int br_netlink_init(void); 1532 void br_netlink_fini(void); 1533 void br_ifinfo_notify(int event, const struct net_bridge *br, 1534 const struct net_bridge_port *port); 1535 void br_info_notify(int event, const struct net_bridge *br, 1536 const struct net_bridge_port *port, u32 filter); 1537 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1538 struct netlink_ext_ack *extack); 1539 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1540 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1541 u32 filter_mask, int nlflags); 1542 int br_process_vlan_info(struct net_bridge *br, 1543 struct net_bridge_port *p, int cmd, 1544 struct bridge_vlan_info *vinfo_curr, 1545 struct bridge_vlan_info **vinfo_last, 1546 bool *changed, 1547 struct netlink_ext_ack *extack); 1548 1549 #ifdef CONFIG_SYSFS 1550 /* br_sysfs_if.c */ 1551 extern const struct sysfs_ops brport_sysfs_ops; 1552 int br_sysfs_addif(struct net_bridge_port *p); 1553 int br_sysfs_renameif(struct net_bridge_port *p); 1554 1555 /* br_sysfs_br.c */ 1556 int br_sysfs_addbr(struct net_device *dev); 1557 void br_sysfs_delbr(struct net_device *dev); 1558 1559 #else 1560 1561 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1562 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1563 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1564 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1565 #endif /* CONFIG_SYSFS */ 1566 1567 /* br_switchdev.c */ 1568 #ifdef CONFIG_NET_SWITCHDEV 1569 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1570 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1571 struct sk_buff *skb); 1572 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1573 const struct sk_buff *skb); 1574 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1575 unsigned long flags, 1576 unsigned long mask); 1577 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1578 int type); 1579 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1580 struct netlink_ext_ack *extack); 1581 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1582 1583 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1584 { 1585 skb->offload_fwd_mark = 0; 1586 } 1587 #else 1588 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1589 { 1590 return 0; 1591 } 1592 1593 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1594 struct sk_buff *skb) 1595 { 1596 } 1597 1598 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1599 const struct sk_buff *skb) 1600 { 1601 return true; 1602 } 1603 1604 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1605 unsigned long flags, 1606 unsigned long mask) 1607 { 1608 return 0; 1609 } 1610 1611 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1612 u16 vid, u16 flags, 1613 struct netlink_ext_ack *extack) 1614 { 1615 return -EOPNOTSUPP; 1616 } 1617 1618 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1619 { 1620 return -EOPNOTSUPP; 1621 } 1622 1623 static inline void 1624 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1625 { 1626 } 1627 1628 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1629 { 1630 } 1631 #endif /* CONFIG_NET_SWITCHDEV */ 1632 1633 /* br_arp_nd_proxy.c */ 1634 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1635 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1636 u16 vid, struct net_bridge_port *p); 1637 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1638 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1639 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1640 #endif 1641