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