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); 854 855 static inline bool br_group_is_l2(const struct br_ip *group) 856 { 857 return group->proto == 0; 858 } 859 860 #define mlock_dereference(X, br) \ 861 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 862 863 static inline bool br_multicast_is_router(struct net_bridge *br) 864 { 865 return br->multicast_router == 2 || 866 (br->multicast_router == 1 && 867 timer_pending(&br->multicast_router_timer)); 868 } 869 870 static inline bool 871 __br_multicast_querier_exists(struct net_bridge *br, 872 struct bridge_mcast_other_query *querier, 873 const bool is_ipv6) 874 { 875 bool own_querier_enabled; 876 877 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 878 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 879 own_querier_enabled = false; 880 else 881 own_querier_enabled = true; 882 } else { 883 own_querier_enabled = false; 884 } 885 886 return time_is_before_jiffies(querier->delay_time) && 887 (own_querier_enabled || timer_pending(&querier->timer)); 888 } 889 890 static inline bool br_multicast_querier_exists(struct net_bridge *br, 891 struct ethhdr *eth, 892 const struct net_bridge_mdb_entry *mdb) 893 { 894 switch (eth->h_proto) { 895 case (htons(ETH_P_IP)): 896 return __br_multicast_querier_exists(br, 897 &br->ip4_other_query, false); 898 #if IS_ENABLED(CONFIG_IPV6) 899 case (htons(ETH_P_IPV6)): 900 return __br_multicast_querier_exists(br, 901 &br->ip6_other_query, true); 902 #endif 903 default: 904 return !!mdb && br_group_is_l2(&mdb->addr); 905 } 906 } 907 908 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 909 { 910 switch (ip->proto) { 911 case htons(ETH_P_IP): 912 return ipv4_is_zeronet(ip->src.ip4); 913 #if IS_ENABLED(CONFIG_IPV6) 914 case htons(ETH_P_IPV6): 915 return ipv6_addr_any(&ip->src.ip6); 916 #endif 917 default: 918 return false; 919 } 920 } 921 922 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 923 __be16 proto) 924 { 925 switch (proto) { 926 case htons(ETH_P_IP): 927 return !!(br->multicast_igmp_version == 3); 928 #if IS_ENABLED(CONFIG_IPV6) 929 case htons(ETH_P_IPV6): 930 return !!(br->multicast_mld_version == 2); 931 #endif 932 default: 933 return false; 934 } 935 } 936 937 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 938 { 939 return BR_INPUT_SKB_CB(skb)->igmp; 940 } 941 942 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 943 { 944 return br->multicast_last_member_interval * 945 br->multicast_last_member_count; 946 } 947 948 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 949 { 950 /* use the RFC default of 2 for QRV */ 951 return 2 * br->multicast_query_interval + 952 br->multicast_query_response_interval; 953 } 954 #else 955 static inline int br_multicast_rcv(struct net_bridge *br, 956 struct net_bridge_port *port, 957 struct sk_buff *skb, 958 u16 vid) 959 { 960 return 0; 961 } 962 963 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 964 struct sk_buff *skb, u16 vid) 965 { 966 return NULL; 967 } 968 969 static inline int br_multicast_add_port(struct net_bridge_port *port) 970 { 971 return 0; 972 } 973 974 static inline void br_multicast_del_port(struct net_bridge_port *port) 975 { 976 } 977 978 static inline void br_multicast_enable_port(struct net_bridge_port *port) 979 { 980 } 981 982 static inline void br_multicast_disable_port(struct net_bridge_port *port) 983 { 984 } 985 986 static inline void br_multicast_init(struct net_bridge *br) 987 { 988 } 989 990 static inline void br_multicast_join_snoopers(struct net_bridge *br) 991 { 992 } 993 994 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 995 { 996 } 997 998 static inline void br_multicast_open(struct net_bridge *br) 999 { 1000 } 1001 1002 static inline void br_multicast_stop(struct net_bridge *br) 1003 { 1004 } 1005 1006 static inline void br_multicast_dev_del(struct net_bridge *br) 1007 { 1008 } 1009 1010 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1011 struct sk_buff *skb, 1012 bool local_rcv, bool local_orig) 1013 { 1014 } 1015 1016 static inline bool br_multicast_is_router(struct net_bridge *br) 1017 { 1018 return false; 1019 } 1020 1021 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1022 struct ethhdr *eth, 1023 const struct net_bridge_mdb_entry *mdb) 1024 { 1025 return false; 1026 } 1027 1028 static inline void br_mdb_init(void) 1029 { 1030 } 1031 1032 static inline void br_mdb_uninit(void) 1033 { 1034 } 1035 1036 static inline int br_mdb_hash_init(struct net_bridge *br) 1037 { 1038 return 0; 1039 } 1040 1041 static inline void br_mdb_hash_fini(struct net_bridge *br) 1042 { 1043 } 1044 1045 static inline void br_multicast_count(struct net_bridge *br, 1046 const struct net_bridge_port *p, 1047 const struct sk_buff *skb, 1048 u8 type, u8 dir) 1049 { 1050 } 1051 1052 static inline int br_multicast_init_stats(struct net_bridge *br) 1053 { 1054 return 0; 1055 } 1056 1057 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1058 { 1059 } 1060 1061 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1062 { 1063 return 0; 1064 } 1065 #endif 1066 1067 /* br_vlan.c */ 1068 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1069 bool br_allowed_ingress(const struct net_bridge *br, 1070 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1071 u16 *vid, u8 *state); 1072 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1073 const struct sk_buff *skb); 1074 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1075 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1076 const struct net_bridge_port *port, 1077 struct net_bridge_vlan_group *vg, 1078 struct sk_buff *skb); 1079 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1080 bool *changed, struct netlink_ext_ack *extack); 1081 int br_vlan_delete(struct net_bridge *br, u16 vid); 1082 void br_vlan_flush(struct net_bridge *br); 1083 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1084 void br_recalculate_fwd_mask(struct net_bridge *br); 1085 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1086 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1087 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1088 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1089 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1090 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1091 int br_vlan_init(struct net_bridge *br); 1092 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1093 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1094 struct netlink_ext_ack *extack); 1095 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1096 bool *changed, struct netlink_ext_ack *extack); 1097 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1098 void nbp_vlan_flush(struct net_bridge_port *port); 1099 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1100 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1101 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1102 struct pcpu_sw_netstats *stats); 1103 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1104 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1105 void *ptr); 1106 void br_vlan_rtnl_init(void); 1107 void br_vlan_rtnl_uninit(void); 1108 void br_vlan_notify(const struct net_bridge *br, 1109 const struct net_bridge_port *p, 1110 u16 vid, u16 vid_range, 1111 int cmd); 1112 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1113 const struct net_bridge_vlan *range_end); 1114 1115 static inline struct net_bridge_vlan_group *br_vlan_group( 1116 const struct net_bridge *br) 1117 { 1118 return rtnl_dereference(br->vlgrp); 1119 } 1120 1121 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1122 const struct net_bridge_port *p) 1123 { 1124 return rtnl_dereference(p->vlgrp); 1125 } 1126 1127 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1128 const struct net_bridge *br) 1129 { 1130 return rcu_dereference(br->vlgrp); 1131 } 1132 1133 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1134 const struct net_bridge_port *p) 1135 { 1136 return rcu_dereference(p->vlgrp); 1137 } 1138 1139 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1140 * skb, the vlan tag will always be present if the frame was tagged. 1141 */ 1142 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1143 { 1144 int err = 0; 1145 1146 if (skb_vlan_tag_present(skb)) { 1147 *vid = skb_vlan_tag_get_id(skb); 1148 } else { 1149 *vid = 0; 1150 err = -EINVAL; 1151 } 1152 1153 return err; 1154 } 1155 1156 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1157 { 1158 if (!vg) 1159 return 0; 1160 1161 smp_rmb(); 1162 return vg->pvid; 1163 } 1164 1165 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1166 { 1167 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1168 } 1169 #else 1170 static inline bool br_allowed_ingress(const struct net_bridge *br, 1171 struct net_bridge_vlan_group *vg, 1172 struct sk_buff *skb, 1173 u16 *vid, u8 *state) 1174 { 1175 return true; 1176 } 1177 1178 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1179 const struct sk_buff *skb) 1180 { 1181 return true; 1182 } 1183 1184 static inline bool br_should_learn(struct net_bridge_port *p, 1185 struct sk_buff *skb, u16 *vid) 1186 { 1187 return true; 1188 } 1189 1190 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1191 const struct net_bridge_port *port, 1192 struct net_bridge_vlan_group *vg, 1193 struct sk_buff *skb) 1194 { 1195 return skb; 1196 } 1197 1198 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1199 bool *changed, struct netlink_ext_ack *extack) 1200 { 1201 *changed = false; 1202 return -EOPNOTSUPP; 1203 } 1204 1205 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1206 { 1207 return -EOPNOTSUPP; 1208 } 1209 1210 static inline void br_vlan_flush(struct net_bridge *br) 1211 { 1212 } 1213 1214 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1215 { 1216 } 1217 1218 static inline int br_vlan_init(struct net_bridge *br) 1219 { 1220 return 0; 1221 } 1222 1223 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1224 bool *changed, struct netlink_ext_ack *extack) 1225 { 1226 *changed = false; 1227 return -EOPNOTSUPP; 1228 } 1229 1230 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1231 { 1232 return -EOPNOTSUPP; 1233 } 1234 1235 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1236 { 1237 } 1238 1239 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1240 u16 vid) 1241 { 1242 return NULL; 1243 } 1244 1245 static inline int nbp_vlan_init(struct net_bridge_port *port, 1246 struct netlink_ext_ack *extack) 1247 { 1248 return 0; 1249 } 1250 1251 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1252 { 1253 return 0; 1254 } 1255 1256 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1257 { 1258 return 0; 1259 } 1260 1261 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1262 unsigned long val) 1263 { 1264 return -EOPNOTSUPP; 1265 } 1266 1267 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1268 u32 filter_mask) 1269 { 1270 return 0; 1271 } 1272 1273 static inline struct net_bridge_vlan_group *br_vlan_group( 1274 const struct net_bridge *br) 1275 { 1276 return NULL; 1277 } 1278 1279 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1280 const struct net_bridge_port *p) 1281 { 1282 return NULL; 1283 } 1284 1285 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1286 const struct net_bridge *br) 1287 { 1288 return NULL; 1289 } 1290 1291 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1292 const struct net_bridge_port *p) 1293 { 1294 return NULL; 1295 } 1296 1297 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1298 struct pcpu_sw_netstats *stats) 1299 { 1300 } 1301 1302 static inline void br_vlan_port_event(struct net_bridge_port *p, 1303 unsigned long event) 1304 { 1305 } 1306 1307 static inline int br_vlan_bridge_event(struct net_device *dev, 1308 unsigned long event, void *ptr) 1309 { 1310 return 0; 1311 } 1312 1313 static inline void br_vlan_rtnl_init(void) 1314 { 1315 } 1316 1317 static inline void br_vlan_rtnl_uninit(void) 1318 { 1319 } 1320 1321 static inline void br_vlan_notify(const struct net_bridge *br, 1322 const struct net_bridge_port *p, 1323 u16 vid, u16 vid_range, 1324 int cmd) 1325 { 1326 } 1327 1328 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1329 const struct net_bridge_vlan *range_end) 1330 { 1331 return true; 1332 } 1333 #endif 1334 1335 /* br_vlan_options.c */ 1336 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1337 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1338 const struct net_bridge_vlan *range_end); 1339 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1340 size_t br_vlan_opts_nl_size(void); 1341 int br_vlan_process_options(const struct net_bridge *br, 1342 const struct net_bridge_port *p, 1343 struct net_bridge_vlan *range_start, 1344 struct net_bridge_vlan *range_end, 1345 struct nlattr **tb, 1346 struct netlink_ext_ack *extack); 1347 1348 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1349 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1350 { 1351 return READ_ONCE(v->state); 1352 } 1353 1354 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1355 { 1356 WRITE_ONCE(v->state, state); 1357 } 1358 1359 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1360 { 1361 return READ_ONCE(vg->pvid_state); 1362 } 1363 1364 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1365 u8 state) 1366 { 1367 WRITE_ONCE(vg->pvid_state, state); 1368 } 1369 1370 /* learn_allow is true at ingress and false at egress */ 1371 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1372 { 1373 switch (state) { 1374 case BR_STATE_LEARNING: 1375 return learn_allow; 1376 case BR_STATE_FORWARDING: 1377 return true; 1378 default: 1379 return false; 1380 } 1381 } 1382 #endif 1383 1384 struct nf_br_ops { 1385 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1386 }; 1387 extern const struct nf_br_ops __rcu *nf_br_ops; 1388 1389 /* br_netfilter.c */ 1390 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1391 int br_nf_core_init(void); 1392 void br_nf_core_fini(void); 1393 void br_netfilter_rtable_init(struct net_bridge *); 1394 #else 1395 static inline int br_nf_core_init(void) { return 0; } 1396 static inline void br_nf_core_fini(void) {} 1397 #define br_netfilter_rtable_init(x) 1398 #endif 1399 1400 /* br_stp.c */ 1401 void br_set_state(struct net_bridge_port *p, unsigned int state); 1402 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1403 void br_init_port(struct net_bridge_port *p); 1404 void br_become_designated_port(struct net_bridge_port *p); 1405 1406 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1407 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1408 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1409 int br_set_max_age(struct net_bridge *br, unsigned long x); 1410 int __set_ageing_time(struct net_device *dev, unsigned long t); 1411 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1412 1413 1414 /* br_stp_if.c */ 1415 void br_stp_enable_bridge(struct net_bridge *br); 1416 void br_stp_disable_bridge(struct net_bridge *br); 1417 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1418 struct netlink_ext_ack *extack); 1419 void br_stp_enable_port(struct net_bridge_port *p); 1420 void br_stp_disable_port(struct net_bridge_port *p); 1421 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1422 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1423 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1424 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1425 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1426 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1427 1428 /* br_stp_bpdu.c */ 1429 struct stp_proto; 1430 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1431 struct net_device *dev); 1432 1433 /* br_stp_timer.c */ 1434 void br_stp_timer_init(struct net_bridge *br); 1435 void br_stp_port_timer_init(struct net_bridge_port *p); 1436 unsigned long br_timer_value(const struct timer_list *timer); 1437 1438 /* br.c */ 1439 #if IS_ENABLED(CONFIG_ATM_LANE) 1440 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1441 #endif 1442 1443 /* br_mrp.c */ 1444 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1445 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1446 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1447 bool br_mrp_enabled(struct net_bridge *br); 1448 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1449 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1450 #else 1451 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1452 struct nlattr *attr, int cmd, 1453 struct netlink_ext_ack *extack) 1454 { 1455 return -EOPNOTSUPP; 1456 } 1457 1458 static inline bool br_mrp_enabled(struct net_bridge *br) 1459 { 1460 return false; 1461 } 1462 1463 static inline void br_mrp_port_del(struct net_bridge *br, 1464 struct net_bridge_port *p) 1465 { 1466 } 1467 1468 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1469 { 1470 return 0; 1471 } 1472 1473 #endif 1474 1475 /* br_cfm.c */ 1476 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1477 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1478 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1479 bool br_cfm_created(struct net_bridge *br); 1480 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1481 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1482 int br_cfm_status_fill_info(struct sk_buff *skb, 1483 struct net_bridge *br, 1484 bool getlink); 1485 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1486 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1487 #else 1488 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1489 struct nlattr *attr, int cmd, 1490 struct netlink_ext_ack *extack) 1491 { 1492 return -EOPNOTSUPP; 1493 } 1494 1495 static inline bool br_cfm_created(struct net_bridge *br) 1496 { 1497 return false; 1498 } 1499 1500 static inline void br_cfm_port_del(struct net_bridge *br, 1501 struct net_bridge_port *p) 1502 { 1503 } 1504 1505 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1506 { 1507 return -EOPNOTSUPP; 1508 } 1509 1510 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1511 struct net_bridge *br, 1512 bool getlink) 1513 { 1514 return -EOPNOTSUPP; 1515 } 1516 1517 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1518 { 1519 return -EOPNOTSUPP; 1520 } 1521 1522 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1523 { 1524 return -EOPNOTSUPP; 1525 } 1526 #endif 1527 1528 /* br_netlink.c */ 1529 extern struct rtnl_link_ops br_link_ops; 1530 int br_netlink_init(void); 1531 void br_netlink_fini(void); 1532 void br_ifinfo_notify(int event, const struct net_bridge *br, 1533 const struct net_bridge_port *port); 1534 void br_info_notify(int event, const struct net_bridge *br, 1535 const struct net_bridge_port *port, u32 filter); 1536 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1537 struct netlink_ext_ack *extack); 1538 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1539 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1540 u32 filter_mask, int nlflags); 1541 int br_process_vlan_info(struct net_bridge *br, 1542 struct net_bridge_port *p, int cmd, 1543 struct bridge_vlan_info *vinfo_curr, 1544 struct bridge_vlan_info **vinfo_last, 1545 bool *changed, 1546 struct netlink_ext_ack *extack); 1547 1548 #ifdef CONFIG_SYSFS 1549 /* br_sysfs_if.c */ 1550 extern const struct sysfs_ops brport_sysfs_ops; 1551 int br_sysfs_addif(struct net_bridge_port *p); 1552 int br_sysfs_renameif(struct net_bridge_port *p); 1553 1554 /* br_sysfs_br.c */ 1555 int br_sysfs_addbr(struct net_device *dev); 1556 void br_sysfs_delbr(struct net_device *dev); 1557 1558 #else 1559 1560 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1561 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1562 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1563 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1564 #endif /* CONFIG_SYSFS */ 1565 1566 /* br_switchdev.c */ 1567 #ifdef CONFIG_NET_SWITCHDEV 1568 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1569 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1570 struct sk_buff *skb); 1571 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1572 const struct sk_buff *skb); 1573 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1574 unsigned long flags, 1575 unsigned long mask); 1576 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1577 int type); 1578 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1579 struct netlink_ext_ack *extack); 1580 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1581 1582 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1583 { 1584 skb->offload_fwd_mark = 0; 1585 } 1586 #else 1587 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1588 { 1589 return 0; 1590 } 1591 1592 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1593 struct sk_buff *skb) 1594 { 1595 } 1596 1597 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1598 const struct sk_buff *skb) 1599 { 1600 return true; 1601 } 1602 1603 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1604 unsigned long flags, 1605 unsigned long mask) 1606 { 1607 return 0; 1608 } 1609 1610 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1611 u16 vid, u16 flags, 1612 struct netlink_ext_ack *extack) 1613 { 1614 return -EOPNOTSUPP; 1615 } 1616 1617 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1618 { 1619 return -EOPNOTSUPP; 1620 } 1621 1622 static inline void 1623 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1624 { 1625 } 1626 1627 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1628 { 1629 } 1630 #endif /* CONFIG_NET_SWITCHDEV */ 1631 1632 /* br_arp_nd_proxy.c */ 1633 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1634 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1635 u16 vid, struct net_bridge_port *p); 1636 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1637 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1638 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1639 #endif 1640