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 u32 multicast_eht_hosts_limit; 314 u32 multicast_eht_hosts_cnt; 315 unsigned char multicast_router; 316 struct bridge_mcast_stats __percpu *mcast_stats; 317 struct timer_list multicast_router_timer; 318 struct hlist_head mglist; 319 struct hlist_node rlist; 320 #endif 321 322 #ifdef CONFIG_SYSFS 323 char sysfs_name[IFNAMSIZ]; 324 #endif 325 326 #ifdef CONFIG_NET_POLL_CONTROLLER 327 struct netpoll *np; 328 #endif 329 #ifdef CONFIG_NET_SWITCHDEV 330 int offload_fwd_mark; 331 #endif 332 u16 group_fwd_mask; 333 u16 backup_redirected_cnt; 334 335 struct bridge_stp_xstats stp_xstats; 336 }; 337 338 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 339 340 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 341 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 342 343 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 344 { 345 return rcu_dereference(dev->rx_handler_data); 346 } 347 348 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 349 { 350 return netif_is_bridge_port(dev) ? 351 rtnl_dereference(dev->rx_handler_data) : NULL; 352 } 353 354 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 355 { 356 return netif_is_bridge_port(dev) ? 357 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 358 } 359 360 enum net_bridge_opts { 361 BROPT_VLAN_ENABLED, 362 BROPT_VLAN_STATS_ENABLED, 363 BROPT_NF_CALL_IPTABLES, 364 BROPT_NF_CALL_IP6TABLES, 365 BROPT_NF_CALL_ARPTABLES, 366 BROPT_GROUP_ADDR_SET, 367 BROPT_MULTICAST_ENABLED, 368 BROPT_MULTICAST_QUERIER, 369 BROPT_MULTICAST_QUERY_USE_IFADDR, 370 BROPT_MULTICAST_STATS_ENABLED, 371 BROPT_HAS_IPV6_ADDR, 372 BROPT_NEIGH_SUPPRESS_ENABLED, 373 BROPT_MTU_SET_BY_USER, 374 BROPT_VLAN_STATS_PER_PORT, 375 BROPT_NO_LL_LEARN, 376 BROPT_VLAN_BRIDGE_BINDING, 377 }; 378 379 struct net_bridge { 380 spinlock_t lock; 381 spinlock_t hash_lock; 382 struct hlist_head frame_type_list; 383 struct net_device *dev; 384 unsigned long options; 385 /* These fields are accessed on each packet */ 386 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 387 __be16 vlan_proto; 388 u16 default_pvid; 389 struct net_bridge_vlan_group __rcu *vlgrp; 390 #endif 391 392 struct rhashtable fdb_hash_tbl; 393 struct list_head port_list; 394 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 395 union { 396 struct rtable fake_rtable; 397 struct rt6_info fake_rt6_info; 398 }; 399 #endif 400 u16 group_fwd_mask; 401 u16 group_fwd_mask_required; 402 403 /* STP */ 404 bridge_id designated_root; 405 bridge_id bridge_id; 406 unsigned char topology_change; 407 unsigned char topology_change_detected; 408 u16 root_port; 409 unsigned long max_age; 410 unsigned long hello_time; 411 unsigned long forward_delay; 412 unsigned long ageing_time; 413 unsigned long bridge_max_age; 414 unsigned long bridge_hello_time; 415 unsigned long bridge_forward_delay; 416 unsigned long bridge_ageing_time; 417 u32 root_path_cost; 418 419 u8 group_addr[ETH_ALEN]; 420 421 enum { 422 BR_NO_STP, /* no spanning tree */ 423 BR_KERNEL_STP, /* old STP in kernel */ 424 BR_USER_STP, /* new RSTP in userspace */ 425 } stp_enabled; 426 427 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 428 429 u32 hash_max; 430 431 u32 multicast_last_member_count; 432 u32 multicast_startup_query_count; 433 434 u8 multicast_igmp_version; 435 u8 multicast_router; 436 #if IS_ENABLED(CONFIG_IPV6) 437 u8 multicast_mld_version; 438 #endif 439 spinlock_t multicast_lock; 440 unsigned long multicast_last_member_interval; 441 unsigned long multicast_membership_interval; 442 unsigned long multicast_querier_interval; 443 unsigned long multicast_query_interval; 444 unsigned long multicast_query_response_interval; 445 unsigned long multicast_startup_query_interval; 446 447 struct rhashtable mdb_hash_tbl; 448 struct rhashtable sg_port_tbl; 449 450 struct hlist_head mcast_gc_list; 451 struct hlist_head mdb_list; 452 struct hlist_head router_list; 453 454 struct timer_list multicast_router_timer; 455 struct bridge_mcast_other_query ip4_other_query; 456 struct bridge_mcast_own_query ip4_own_query; 457 struct bridge_mcast_querier ip4_querier; 458 struct bridge_mcast_stats __percpu *mcast_stats; 459 #if IS_ENABLED(CONFIG_IPV6) 460 struct bridge_mcast_other_query ip6_other_query; 461 struct bridge_mcast_own_query ip6_own_query; 462 struct bridge_mcast_querier ip6_querier; 463 #endif /* IS_ENABLED(CONFIG_IPV6) */ 464 struct work_struct mcast_gc_work; 465 #endif 466 467 struct timer_list hello_timer; 468 struct timer_list tcn_timer; 469 struct timer_list topology_change_timer; 470 struct delayed_work gc_work; 471 struct kobject *ifobj; 472 u32 auto_cnt; 473 474 #ifdef CONFIG_NET_SWITCHDEV 475 int offload_fwd_mark; 476 #endif 477 struct hlist_head fdb_list; 478 479 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 480 struct hlist_head mrp_list; 481 #endif 482 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 483 struct hlist_head mep_list; 484 #endif 485 }; 486 487 struct br_input_skb_cb { 488 struct net_device *brdev; 489 490 u16 frag_max_size; 491 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 492 u8 igmp; 493 u8 mrouters_only:1; 494 #endif 495 u8 proxyarp_replied:1; 496 u8 src_port_isolated:1; 497 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 498 u8 vlan_filtered:1; 499 #endif 500 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 501 u8 br_netfilter_broute:1; 502 #endif 503 504 #ifdef CONFIG_NET_SWITCHDEV 505 int offload_fwd_mark; 506 #endif 507 }; 508 509 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 510 511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 512 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 513 #else 514 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 515 #endif 516 517 #define br_printk(level, br, format, args...) \ 518 printk(level "%s: " format, (br)->dev->name, ##args) 519 520 #define br_err(__br, format, args...) \ 521 br_printk(KERN_ERR, __br, format, ##args) 522 #define br_warn(__br, format, args...) \ 523 br_printk(KERN_WARNING, __br, format, ##args) 524 #define br_notice(__br, format, args...) \ 525 br_printk(KERN_NOTICE, __br, format, ##args) 526 #define br_info(__br, format, args...) \ 527 br_printk(KERN_INFO, __br, format, ##args) 528 529 #define br_debug(br, format, args...) \ 530 pr_debug("%s: " format, (br)->dev->name, ##args) 531 532 /* called under bridge lock */ 533 static inline int br_is_root_bridge(const struct net_bridge *br) 534 { 535 return !memcmp(&br->bridge_id, &br->designated_root, 8); 536 } 537 538 /* check if a VLAN entry is global */ 539 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 540 { 541 return v->flags & BRIDGE_VLAN_INFO_MASTER; 542 } 543 544 /* check if a VLAN entry is used by the bridge */ 545 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 546 { 547 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 548 } 549 550 /* check if we should use the vlan entry, returns false if it's only context */ 551 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 552 { 553 if (br_vlan_is_master(v)) { 554 if (br_vlan_is_brentry(v)) 555 return true; 556 else 557 return false; 558 } 559 560 return true; 561 } 562 563 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 564 { 565 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 566 } 567 568 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 569 { 570 bool ret = vid > 0 && vid < VLAN_VID_MASK; 571 572 if (!ret) 573 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 574 575 return ret; 576 } 577 578 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 579 const struct bridge_vlan_info *last, 580 struct netlink_ext_ack *extack) 581 { 582 /* pvid flag is not allowed in ranges */ 583 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 584 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 585 return false; 586 } 587 588 /* when cur is the range end, check if: 589 * - it has range start flag 590 * - range ids are invalid (end is equal to or before start) 591 */ 592 if (last) { 593 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 594 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 595 return false; 596 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 597 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 598 return false; 599 } else if (cur->vid <= last->vid) { 600 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 601 return false; 602 } 603 } 604 605 /* check for required range flags */ 606 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 607 BRIDGE_VLAN_INFO_RANGE_END))) { 608 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 609 return false; 610 } 611 612 return true; 613 } 614 615 static inline int br_afspec_cmd_to_rtm(int cmd) 616 { 617 switch (cmd) { 618 case RTM_SETLINK: 619 return RTM_NEWVLAN; 620 case RTM_DELLINK: 621 return RTM_DELVLAN; 622 } 623 624 return 0; 625 } 626 627 static inline int br_opt_get(const struct net_bridge *br, 628 enum net_bridge_opts opt) 629 { 630 return test_bit(opt, &br->options); 631 } 632 633 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 634 struct netlink_ext_ack *extack); 635 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 636 int br_boolopt_multi_toggle(struct net_bridge *br, 637 struct br_boolopt_multi *bm, 638 struct netlink_ext_ack *extack); 639 void br_boolopt_multi_get(const struct net_bridge *br, 640 struct br_boolopt_multi *bm); 641 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 642 643 /* br_device.c */ 644 void br_dev_setup(struct net_device *dev); 645 void br_dev_delete(struct net_device *dev, struct list_head *list); 646 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 647 #ifdef CONFIG_NET_POLL_CONTROLLER 648 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 649 struct sk_buff *skb) 650 { 651 netpoll_send_skb(p->np, skb); 652 } 653 654 int br_netpoll_enable(struct net_bridge_port *p); 655 void br_netpoll_disable(struct net_bridge_port *p); 656 #else 657 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 658 struct sk_buff *skb) 659 { 660 } 661 662 static inline int br_netpoll_enable(struct net_bridge_port *p) 663 { 664 return 0; 665 } 666 667 static inline void br_netpoll_disable(struct net_bridge_port *p) 668 { 669 } 670 #endif 671 672 /* br_fdb.c */ 673 int br_fdb_init(void); 674 void br_fdb_fini(void); 675 int br_fdb_hash_init(struct net_bridge *br); 676 void br_fdb_hash_fini(struct net_bridge *br); 677 void br_fdb_flush(struct net_bridge *br); 678 void br_fdb_find_delete_local(struct net_bridge *br, 679 const struct net_bridge_port *p, 680 const unsigned char *addr, u16 vid); 681 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 682 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 683 void br_fdb_cleanup(struct work_struct *work); 684 void br_fdb_delete_by_port(struct net_bridge *br, 685 const struct net_bridge_port *p, u16 vid, int do_all); 686 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 687 const unsigned char *addr, 688 __u16 vid); 689 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 690 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 691 unsigned long off); 692 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 693 const unsigned char *addr, u16 vid); 694 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 695 const unsigned char *addr, u16 vid, unsigned long flags); 696 697 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 698 struct net_device *dev, const unsigned char *addr, u16 vid); 699 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 700 const unsigned char *addr, u16 vid, u16 nlh_flags, 701 struct netlink_ext_ack *extack); 702 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 703 struct net_device *dev, struct net_device *fdev, int *idx); 704 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 705 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 706 struct netlink_ext_ack *extack); 707 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 708 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 709 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 710 const unsigned char *addr, u16 vid, 711 bool swdev_notify); 712 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 713 const unsigned char *addr, u16 vid, 714 bool swdev_notify); 715 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 716 const unsigned char *addr, u16 vid, bool offloaded); 717 718 /* br_forward.c */ 719 enum br_pkt_type { 720 BR_PKT_UNICAST, 721 BR_PKT_MULTICAST, 722 BR_PKT_BROADCAST 723 }; 724 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 725 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 726 bool local_rcv, bool local_orig); 727 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 728 void br_flood(struct net_bridge *br, struct sk_buff *skb, 729 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 730 731 /* return true if both source port and dest port are isolated */ 732 static inline bool br_skb_isolated(const struct net_bridge_port *to, 733 const struct sk_buff *skb) 734 { 735 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 736 (to->flags & BR_ISOLATED); 737 } 738 739 /* br_if.c */ 740 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 741 int br_add_bridge(struct net *net, const char *name); 742 int br_del_bridge(struct net *net, const char *name); 743 int br_add_if(struct net_bridge *br, struct net_device *dev, 744 struct netlink_ext_ack *extack); 745 int br_del_if(struct net_bridge *br, struct net_device *dev); 746 void br_mtu_auto_adjust(struct net_bridge *br); 747 netdev_features_t br_features_recompute(struct net_bridge *br, 748 netdev_features_t features); 749 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 750 void br_manage_promisc(struct net_bridge *br); 751 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 752 753 /* br_input.c */ 754 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 755 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 756 757 struct br_frame_type { 758 __be16 type; 759 int (*frame_handler)(struct net_bridge_port *port, 760 struct sk_buff *skb); 761 struct hlist_node list; 762 }; 763 764 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 765 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 766 767 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 768 { 769 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 770 } 771 772 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 773 { 774 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 775 } 776 777 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 778 { 779 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 780 } 781 782 static inline struct net_bridge_port * 783 br_port_get_check_rtnl(const struct net_device *dev) 784 { 785 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 786 } 787 788 /* br_ioctl.c */ 789 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 790 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 791 void __user *arg); 792 793 /* br_multicast.c */ 794 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 795 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 796 struct sk_buff *skb, u16 vid); 797 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 798 struct sk_buff *skb, u16 vid); 799 int br_multicast_add_port(struct net_bridge_port *port); 800 void br_multicast_del_port(struct net_bridge_port *port); 801 void br_multicast_enable_port(struct net_bridge_port *port); 802 void br_multicast_disable_port(struct net_bridge_port *port); 803 void br_multicast_init(struct net_bridge *br); 804 void br_multicast_join_snoopers(struct net_bridge *br); 805 void br_multicast_leave_snoopers(struct net_bridge *br); 806 void br_multicast_open(struct net_bridge *br); 807 void br_multicast_stop(struct net_bridge *br); 808 void br_multicast_dev_del(struct net_bridge *br); 809 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 810 struct sk_buff *skb, bool local_rcv, bool local_orig); 811 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 812 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 813 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 814 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 815 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 816 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 817 #if IS_ENABLED(CONFIG_IPV6) 818 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 819 #endif 820 struct net_bridge_mdb_entry * 821 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 822 struct net_bridge_mdb_entry * 823 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 824 struct net_bridge_port_group * 825 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 826 struct net_bridge_port_group __rcu *next, 827 unsigned char flags, const unsigned char *src, 828 u8 filter_mode, u8 rt_protocol); 829 int br_mdb_hash_init(struct net_bridge *br); 830 void br_mdb_hash_fini(struct net_bridge *br); 831 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 832 struct net_bridge_port_group *pg, int type); 833 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 834 int type); 835 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 836 struct net_bridge_port_group *pg, 837 struct net_bridge_port_group __rcu **pp); 838 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 839 const struct sk_buff *skb, u8 type, u8 dir); 840 int br_multicast_init_stats(struct net_bridge *br); 841 void br_multicast_uninit_stats(struct net_bridge *br); 842 void br_multicast_get_stats(const struct net_bridge *br, 843 const struct net_bridge_port *p, 844 struct br_mcast_stats *dest); 845 void br_mdb_init(void); 846 void br_mdb_uninit(void); 847 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 848 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 849 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 850 u8 filter_mode); 851 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 852 struct net_bridge_port_group *sg); 853 struct net_bridge_group_src * 854 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 855 void br_multicast_del_group_src(struct net_bridge_group_src *src, 856 bool fastleave); 857 858 static inline bool br_group_is_l2(const struct br_ip *group) 859 { 860 return group->proto == 0; 861 } 862 863 #define mlock_dereference(X, br) \ 864 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 865 866 static inline bool br_multicast_is_router(struct net_bridge *br) 867 { 868 return br->multicast_router == 2 || 869 (br->multicast_router == 1 && 870 timer_pending(&br->multicast_router_timer)); 871 } 872 873 static inline bool 874 __br_multicast_querier_exists(struct net_bridge *br, 875 struct bridge_mcast_other_query *querier, 876 const bool is_ipv6) 877 { 878 bool own_querier_enabled; 879 880 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 881 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 882 own_querier_enabled = false; 883 else 884 own_querier_enabled = true; 885 } else { 886 own_querier_enabled = false; 887 } 888 889 return time_is_before_jiffies(querier->delay_time) && 890 (own_querier_enabled || timer_pending(&querier->timer)); 891 } 892 893 static inline bool br_multicast_querier_exists(struct net_bridge *br, 894 struct ethhdr *eth, 895 const struct net_bridge_mdb_entry *mdb) 896 { 897 switch (eth->h_proto) { 898 case (htons(ETH_P_IP)): 899 return __br_multicast_querier_exists(br, 900 &br->ip4_other_query, false); 901 #if IS_ENABLED(CONFIG_IPV6) 902 case (htons(ETH_P_IPV6)): 903 return __br_multicast_querier_exists(br, 904 &br->ip6_other_query, true); 905 #endif 906 default: 907 return !!mdb && br_group_is_l2(&mdb->addr); 908 } 909 } 910 911 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 912 { 913 switch (ip->proto) { 914 case htons(ETH_P_IP): 915 return ipv4_is_zeronet(ip->src.ip4); 916 #if IS_ENABLED(CONFIG_IPV6) 917 case htons(ETH_P_IPV6): 918 return ipv6_addr_any(&ip->src.ip6); 919 #endif 920 default: 921 return false; 922 } 923 } 924 925 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 926 __be16 proto) 927 { 928 switch (proto) { 929 case htons(ETH_P_IP): 930 return !!(br->multicast_igmp_version == 3); 931 #if IS_ENABLED(CONFIG_IPV6) 932 case htons(ETH_P_IPV6): 933 return !!(br->multicast_mld_version == 2); 934 #endif 935 default: 936 return false; 937 } 938 } 939 940 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 941 { 942 return BR_INPUT_SKB_CB(skb)->igmp; 943 } 944 945 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 946 { 947 return br->multicast_last_member_interval * 948 br->multicast_last_member_count; 949 } 950 951 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 952 { 953 /* use the RFC default of 2 for QRV */ 954 return 2 * br->multicast_query_interval + 955 br->multicast_query_response_interval; 956 } 957 #else 958 static inline int br_multicast_rcv(struct net_bridge *br, 959 struct net_bridge_port *port, 960 struct sk_buff *skb, 961 u16 vid) 962 { 963 return 0; 964 } 965 966 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 967 struct sk_buff *skb, u16 vid) 968 { 969 return NULL; 970 } 971 972 static inline int br_multicast_add_port(struct net_bridge_port *port) 973 { 974 return 0; 975 } 976 977 static inline void br_multicast_del_port(struct net_bridge_port *port) 978 { 979 } 980 981 static inline void br_multicast_enable_port(struct net_bridge_port *port) 982 { 983 } 984 985 static inline void br_multicast_disable_port(struct net_bridge_port *port) 986 { 987 } 988 989 static inline void br_multicast_init(struct net_bridge *br) 990 { 991 } 992 993 static inline void br_multicast_join_snoopers(struct net_bridge *br) 994 { 995 } 996 997 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 998 { 999 } 1000 1001 static inline void br_multicast_open(struct net_bridge *br) 1002 { 1003 } 1004 1005 static inline void br_multicast_stop(struct net_bridge *br) 1006 { 1007 } 1008 1009 static inline void br_multicast_dev_del(struct net_bridge *br) 1010 { 1011 } 1012 1013 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1014 struct sk_buff *skb, 1015 bool local_rcv, bool local_orig) 1016 { 1017 } 1018 1019 static inline bool br_multicast_is_router(struct net_bridge *br) 1020 { 1021 return false; 1022 } 1023 1024 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1025 struct ethhdr *eth, 1026 const struct net_bridge_mdb_entry *mdb) 1027 { 1028 return false; 1029 } 1030 1031 static inline void br_mdb_init(void) 1032 { 1033 } 1034 1035 static inline void br_mdb_uninit(void) 1036 { 1037 } 1038 1039 static inline int br_mdb_hash_init(struct net_bridge *br) 1040 { 1041 return 0; 1042 } 1043 1044 static inline void br_mdb_hash_fini(struct net_bridge *br) 1045 { 1046 } 1047 1048 static inline void br_multicast_count(struct net_bridge *br, 1049 const struct net_bridge_port *p, 1050 const struct sk_buff *skb, 1051 u8 type, u8 dir) 1052 { 1053 } 1054 1055 static inline int br_multicast_init_stats(struct net_bridge *br) 1056 { 1057 return 0; 1058 } 1059 1060 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1061 { 1062 } 1063 1064 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1065 { 1066 return 0; 1067 } 1068 #endif 1069 1070 /* br_vlan.c */ 1071 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1072 bool br_allowed_ingress(const struct net_bridge *br, 1073 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1074 u16 *vid, u8 *state); 1075 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1076 const struct sk_buff *skb); 1077 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1078 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1079 const struct net_bridge_port *port, 1080 struct net_bridge_vlan_group *vg, 1081 struct sk_buff *skb); 1082 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1083 bool *changed, struct netlink_ext_ack *extack); 1084 int br_vlan_delete(struct net_bridge *br, u16 vid); 1085 void br_vlan_flush(struct net_bridge *br); 1086 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1087 void br_recalculate_fwd_mask(struct net_bridge *br); 1088 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1089 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1090 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1091 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1092 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1093 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1094 int br_vlan_init(struct net_bridge *br); 1095 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1096 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1097 struct netlink_ext_ack *extack); 1098 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1099 bool *changed, struct netlink_ext_ack *extack); 1100 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1101 void nbp_vlan_flush(struct net_bridge_port *port); 1102 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1103 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1104 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1105 struct pcpu_sw_netstats *stats); 1106 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1107 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1108 void *ptr); 1109 void br_vlan_rtnl_init(void); 1110 void br_vlan_rtnl_uninit(void); 1111 void br_vlan_notify(const struct net_bridge *br, 1112 const struct net_bridge_port *p, 1113 u16 vid, u16 vid_range, 1114 int cmd); 1115 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1116 const struct net_bridge_vlan *range_end); 1117 1118 static inline struct net_bridge_vlan_group *br_vlan_group( 1119 const struct net_bridge *br) 1120 { 1121 return rtnl_dereference(br->vlgrp); 1122 } 1123 1124 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1125 const struct net_bridge_port *p) 1126 { 1127 return rtnl_dereference(p->vlgrp); 1128 } 1129 1130 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1131 const struct net_bridge *br) 1132 { 1133 return rcu_dereference(br->vlgrp); 1134 } 1135 1136 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1137 const struct net_bridge_port *p) 1138 { 1139 return rcu_dereference(p->vlgrp); 1140 } 1141 1142 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1143 * skb, the vlan tag will always be present if the frame was tagged. 1144 */ 1145 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1146 { 1147 int err = 0; 1148 1149 if (skb_vlan_tag_present(skb)) { 1150 *vid = skb_vlan_tag_get_id(skb); 1151 } else { 1152 *vid = 0; 1153 err = -EINVAL; 1154 } 1155 1156 return err; 1157 } 1158 1159 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1160 { 1161 if (!vg) 1162 return 0; 1163 1164 smp_rmb(); 1165 return vg->pvid; 1166 } 1167 1168 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1169 { 1170 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1171 } 1172 #else 1173 static inline bool br_allowed_ingress(const struct net_bridge *br, 1174 struct net_bridge_vlan_group *vg, 1175 struct sk_buff *skb, 1176 u16 *vid, u8 *state) 1177 { 1178 return true; 1179 } 1180 1181 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1182 const struct sk_buff *skb) 1183 { 1184 return true; 1185 } 1186 1187 static inline bool br_should_learn(struct net_bridge_port *p, 1188 struct sk_buff *skb, u16 *vid) 1189 { 1190 return true; 1191 } 1192 1193 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1194 const struct net_bridge_port *port, 1195 struct net_bridge_vlan_group *vg, 1196 struct sk_buff *skb) 1197 { 1198 return skb; 1199 } 1200 1201 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1202 bool *changed, struct netlink_ext_ack *extack) 1203 { 1204 *changed = false; 1205 return -EOPNOTSUPP; 1206 } 1207 1208 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1209 { 1210 return -EOPNOTSUPP; 1211 } 1212 1213 static inline void br_vlan_flush(struct net_bridge *br) 1214 { 1215 } 1216 1217 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1218 { 1219 } 1220 1221 static inline int br_vlan_init(struct net_bridge *br) 1222 { 1223 return 0; 1224 } 1225 1226 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1227 bool *changed, struct netlink_ext_ack *extack) 1228 { 1229 *changed = false; 1230 return -EOPNOTSUPP; 1231 } 1232 1233 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1234 { 1235 return -EOPNOTSUPP; 1236 } 1237 1238 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1239 { 1240 } 1241 1242 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1243 u16 vid) 1244 { 1245 return NULL; 1246 } 1247 1248 static inline int nbp_vlan_init(struct net_bridge_port *port, 1249 struct netlink_ext_ack *extack) 1250 { 1251 return 0; 1252 } 1253 1254 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1255 { 1256 return 0; 1257 } 1258 1259 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1260 { 1261 return 0; 1262 } 1263 1264 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1265 unsigned long val) 1266 { 1267 return -EOPNOTSUPP; 1268 } 1269 1270 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1271 u32 filter_mask) 1272 { 1273 return 0; 1274 } 1275 1276 static inline struct net_bridge_vlan_group *br_vlan_group( 1277 const struct net_bridge *br) 1278 { 1279 return NULL; 1280 } 1281 1282 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1283 const struct net_bridge_port *p) 1284 { 1285 return NULL; 1286 } 1287 1288 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1289 const struct net_bridge *br) 1290 { 1291 return NULL; 1292 } 1293 1294 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1295 const struct net_bridge_port *p) 1296 { 1297 return NULL; 1298 } 1299 1300 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1301 struct pcpu_sw_netstats *stats) 1302 { 1303 } 1304 1305 static inline void br_vlan_port_event(struct net_bridge_port *p, 1306 unsigned long event) 1307 { 1308 } 1309 1310 static inline int br_vlan_bridge_event(struct net_device *dev, 1311 unsigned long event, void *ptr) 1312 { 1313 return 0; 1314 } 1315 1316 static inline void br_vlan_rtnl_init(void) 1317 { 1318 } 1319 1320 static inline void br_vlan_rtnl_uninit(void) 1321 { 1322 } 1323 1324 static inline void br_vlan_notify(const struct net_bridge *br, 1325 const struct net_bridge_port *p, 1326 u16 vid, u16 vid_range, 1327 int cmd) 1328 { 1329 } 1330 1331 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1332 const struct net_bridge_vlan *range_end) 1333 { 1334 return true; 1335 } 1336 #endif 1337 1338 /* br_vlan_options.c */ 1339 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1340 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1341 const struct net_bridge_vlan *range_end); 1342 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1343 size_t br_vlan_opts_nl_size(void); 1344 int br_vlan_process_options(const struct net_bridge *br, 1345 const struct net_bridge_port *p, 1346 struct net_bridge_vlan *range_start, 1347 struct net_bridge_vlan *range_end, 1348 struct nlattr **tb, 1349 struct netlink_ext_ack *extack); 1350 1351 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1352 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1353 { 1354 return READ_ONCE(v->state); 1355 } 1356 1357 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1358 { 1359 WRITE_ONCE(v->state, state); 1360 } 1361 1362 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1363 { 1364 return READ_ONCE(vg->pvid_state); 1365 } 1366 1367 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1368 u8 state) 1369 { 1370 WRITE_ONCE(vg->pvid_state, state); 1371 } 1372 1373 /* learn_allow is true at ingress and false at egress */ 1374 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1375 { 1376 switch (state) { 1377 case BR_STATE_LEARNING: 1378 return learn_allow; 1379 case BR_STATE_FORWARDING: 1380 return true; 1381 default: 1382 return false; 1383 } 1384 } 1385 #endif 1386 1387 struct nf_br_ops { 1388 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1389 }; 1390 extern const struct nf_br_ops __rcu *nf_br_ops; 1391 1392 /* br_netfilter.c */ 1393 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1394 int br_nf_core_init(void); 1395 void br_nf_core_fini(void); 1396 void br_netfilter_rtable_init(struct net_bridge *); 1397 #else 1398 static inline int br_nf_core_init(void) { return 0; } 1399 static inline void br_nf_core_fini(void) {} 1400 #define br_netfilter_rtable_init(x) 1401 #endif 1402 1403 /* br_stp.c */ 1404 void br_set_state(struct net_bridge_port *p, unsigned int state); 1405 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1406 void br_init_port(struct net_bridge_port *p); 1407 void br_become_designated_port(struct net_bridge_port *p); 1408 1409 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1410 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1411 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1412 int br_set_max_age(struct net_bridge *br, unsigned long x); 1413 int __set_ageing_time(struct net_device *dev, unsigned long t); 1414 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1415 1416 1417 /* br_stp_if.c */ 1418 void br_stp_enable_bridge(struct net_bridge *br); 1419 void br_stp_disable_bridge(struct net_bridge *br); 1420 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1421 struct netlink_ext_ack *extack); 1422 void br_stp_enable_port(struct net_bridge_port *p); 1423 void br_stp_disable_port(struct net_bridge_port *p); 1424 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1425 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1426 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1427 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1428 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1429 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1430 1431 /* br_stp_bpdu.c */ 1432 struct stp_proto; 1433 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1434 struct net_device *dev); 1435 1436 /* br_stp_timer.c */ 1437 void br_stp_timer_init(struct net_bridge *br); 1438 void br_stp_port_timer_init(struct net_bridge_port *p); 1439 unsigned long br_timer_value(const struct timer_list *timer); 1440 1441 /* br.c */ 1442 #if IS_ENABLED(CONFIG_ATM_LANE) 1443 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1444 #endif 1445 1446 /* br_mrp.c */ 1447 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1448 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1449 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1450 bool br_mrp_enabled(struct net_bridge *br); 1451 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1452 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1453 #else 1454 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1455 struct nlattr *attr, int cmd, 1456 struct netlink_ext_ack *extack) 1457 { 1458 return -EOPNOTSUPP; 1459 } 1460 1461 static inline bool br_mrp_enabled(struct net_bridge *br) 1462 { 1463 return false; 1464 } 1465 1466 static inline void br_mrp_port_del(struct net_bridge *br, 1467 struct net_bridge_port *p) 1468 { 1469 } 1470 1471 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1472 { 1473 return 0; 1474 } 1475 1476 #endif 1477 1478 /* br_cfm.c */ 1479 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1480 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1481 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1482 bool br_cfm_created(struct net_bridge *br); 1483 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1484 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1485 int br_cfm_status_fill_info(struct sk_buff *skb, 1486 struct net_bridge *br, 1487 bool getlink); 1488 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1489 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1490 #else 1491 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1492 struct nlattr *attr, int cmd, 1493 struct netlink_ext_ack *extack) 1494 { 1495 return -EOPNOTSUPP; 1496 } 1497 1498 static inline bool br_cfm_created(struct net_bridge *br) 1499 { 1500 return false; 1501 } 1502 1503 static inline void br_cfm_port_del(struct net_bridge *br, 1504 struct net_bridge_port *p) 1505 { 1506 } 1507 1508 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1509 { 1510 return -EOPNOTSUPP; 1511 } 1512 1513 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1514 struct net_bridge *br, 1515 bool getlink) 1516 { 1517 return -EOPNOTSUPP; 1518 } 1519 1520 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1521 { 1522 return -EOPNOTSUPP; 1523 } 1524 1525 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1526 { 1527 return -EOPNOTSUPP; 1528 } 1529 #endif 1530 1531 /* br_netlink.c */ 1532 extern struct rtnl_link_ops br_link_ops; 1533 int br_netlink_init(void); 1534 void br_netlink_fini(void); 1535 void br_ifinfo_notify(int event, const struct net_bridge *br, 1536 const struct net_bridge_port *port); 1537 void br_info_notify(int event, const struct net_bridge *br, 1538 const struct net_bridge_port *port, u32 filter); 1539 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1540 struct netlink_ext_ack *extack); 1541 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1542 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1543 u32 filter_mask, int nlflags); 1544 int br_process_vlan_info(struct net_bridge *br, 1545 struct net_bridge_port *p, int cmd, 1546 struct bridge_vlan_info *vinfo_curr, 1547 struct bridge_vlan_info **vinfo_last, 1548 bool *changed, 1549 struct netlink_ext_ack *extack); 1550 1551 #ifdef CONFIG_SYSFS 1552 /* br_sysfs_if.c */ 1553 extern const struct sysfs_ops brport_sysfs_ops; 1554 int br_sysfs_addif(struct net_bridge_port *p); 1555 int br_sysfs_renameif(struct net_bridge_port *p); 1556 1557 /* br_sysfs_br.c */ 1558 int br_sysfs_addbr(struct net_device *dev); 1559 void br_sysfs_delbr(struct net_device *dev); 1560 1561 #else 1562 1563 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1564 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1565 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1566 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1567 #endif /* CONFIG_SYSFS */ 1568 1569 /* br_switchdev.c */ 1570 #ifdef CONFIG_NET_SWITCHDEV 1571 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1572 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1573 struct sk_buff *skb); 1574 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1575 const struct sk_buff *skb); 1576 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1577 unsigned long flags, 1578 unsigned long mask); 1579 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1580 int type); 1581 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1582 struct netlink_ext_ack *extack); 1583 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1584 1585 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1586 { 1587 skb->offload_fwd_mark = 0; 1588 } 1589 #else 1590 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1591 { 1592 return 0; 1593 } 1594 1595 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1596 struct sk_buff *skb) 1597 { 1598 } 1599 1600 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1601 const struct sk_buff *skb) 1602 { 1603 return true; 1604 } 1605 1606 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1607 unsigned long flags, 1608 unsigned long mask) 1609 { 1610 return 0; 1611 } 1612 1613 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1614 u16 vid, u16 flags, 1615 struct netlink_ext_ack *extack) 1616 { 1617 return -EOPNOTSUPP; 1618 } 1619 1620 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1621 { 1622 return -EOPNOTSUPP; 1623 } 1624 1625 static inline void 1626 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1627 { 1628 } 1629 1630 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1631 { 1632 } 1633 #endif /* CONFIG_NET_SWITCHDEV */ 1634 1635 /* br_arp_nd_proxy.c */ 1636 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1637 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1638 u16 vid, struct net_bridge_port *p); 1639 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1640 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1641 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1642 #endif 1643