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; 255 256 struct rhash_head rhnode; 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 hlist_head frame_type_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 struct list_head port_list; 391 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 392 union { 393 struct rtable fake_rtable; 394 struct rt6_info fake_rt6_info; 395 }; 396 #endif 397 u16 group_fwd_mask; 398 u16 group_fwd_mask_required; 399 400 /* STP */ 401 bridge_id designated_root; 402 bridge_id bridge_id; 403 unsigned char topology_change; 404 unsigned char topology_change_detected; 405 u16 root_port; 406 unsigned long max_age; 407 unsigned long hello_time; 408 unsigned long forward_delay; 409 unsigned long ageing_time; 410 unsigned long bridge_max_age; 411 unsigned long bridge_hello_time; 412 unsigned long bridge_forward_delay; 413 unsigned long bridge_ageing_time; 414 u32 root_path_cost; 415 416 u8 group_addr[ETH_ALEN]; 417 418 enum { 419 BR_NO_STP, /* no spanning tree */ 420 BR_KERNEL_STP, /* old STP in kernel */ 421 BR_USER_STP, /* new RSTP in userspace */ 422 } stp_enabled; 423 424 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 425 426 u32 hash_max; 427 428 u32 multicast_last_member_count; 429 u32 multicast_startup_query_count; 430 431 u8 multicast_igmp_version; 432 u8 multicast_router; 433 #if IS_ENABLED(CONFIG_IPV6) 434 u8 multicast_mld_version; 435 #endif 436 spinlock_t multicast_lock; 437 unsigned long multicast_last_member_interval; 438 unsigned long multicast_membership_interval; 439 unsigned long multicast_querier_interval; 440 unsigned long multicast_query_interval; 441 unsigned long multicast_query_response_interval; 442 unsigned long multicast_startup_query_interval; 443 444 struct rhashtable mdb_hash_tbl; 445 struct rhashtable sg_port_tbl; 446 447 struct hlist_head mcast_gc_list; 448 struct hlist_head mdb_list; 449 struct hlist_head router_list; 450 451 struct timer_list multicast_router_timer; 452 struct bridge_mcast_other_query ip4_other_query; 453 struct bridge_mcast_own_query ip4_own_query; 454 struct bridge_mcast_querier ip4_querier; 455 struct bridge_mcast_stats __percpu *mcast_stats; 456 #if IS_ENABLED(CONFIG_IPV6) 457 struct bridge_mcast_other_query ip6_other_query; 458 struct bridge_mcast_own_query ip6_own_query; 459 struct bridge_mcast_querier ip6_querier; 460 #endif /* IS_ENABLED(CONFIG_IPV6) */ 461 struct work_struct mcast_gc_work; 462 #endif 463 464 struct timer_list hello_timer; 465 struct timer_list tcn_timer; 466 struct timer_list topology_change_timer; 467 struct delayed_work gc_work; 468 struct kobject *ifobj; 469 u32 auto_cnt; 470 471 #ifdef CONFIG_NET_SWITCHDEV 472 int offload_fwd_mark; 473 #endif 474 struct hlist_head fdb_list; 475 476 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 477 struct hlist_head mrp_list; 478 #endif 479 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 480 struct hlist_head mep_list; 481 #endif 482 }; 483 484 struct br_input_skb_cb { 485 struct net_device *brdev; 486 487 u16 frag_max_size; 488 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 489 u8 igmp; 490 u8 mrouters_only:1; 491 #endif 492 u8 proxyarp_replied:1; 493 u8 src_port_isolated:1; 494 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 495 u8 vlan_filtered:1; 496 #endif 497 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 498 u8 br_netfilter_broute:1; 499 #endif 500 501 #ifdef CONFIG_NET_SWITCHDEV 502 int offload_fwd_mark; 503 #endif 504 }; 505 506 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 507 508 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 509 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 510 #else 511 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 512 #endif 513 514 #define br_printk(level, br, format, args...) \ 515 printk(level "%s: " format, (br)->dev->name, ##args) 516 517 #define br_err(__br, format, args...) \ 518 br_printk(KERN_ERR, __br, format, ##args) 519 #define br_warn(__br, format, args...) \ 520 br_printk(KERN_WARNING, __br, format, ##args) 521 #define br_notice(__br, format, args...) \ 522 br_printk(KERN_NOTICE, __br, format, ##args) 523 #define br_info(__br, format, args...) \ 524 br_printk(KERN_INFO, __br, format, ##args) 525 526 #define br_debug(br, format, args...) \ 527 pr_debug("%s: " format, (br)->dev->name, ##args) 528 529 /* called under bridge lock */ 530 static inline int br_is_root_bridge(const struct net_bridge *br) 531 { 532 return !memcmp(&br->bridge_id, &br->designated_root, 8); 533 } 534 535 /* check if a VLAN entry is global */ 536 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 537 { 538 return v->flags & BRIDGE_VLAN_INFO_MASTER; 539 } 540 541 /* check if a VLAN entry is used by the bridge */ 542 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 543 { 544 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 545 } 546 547 /* check if we should use the vlan entry, returns false if it's only context */ 548 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 549 { 550 if (br_vlan_is_master(v)) { 551 if (br_vlan_is_brentry(v)) 552 return true; 553 else 554 return false; 555 } 556 557 return true; 558 } 559 560 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 561 { 562 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 563 } 564 565 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 566 { 567 bool ret = vid > 0 && vid < VLAN_VID_MASK; 568 569 if (!ret) 570 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 571 572 return ret; 573 } 574 575 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 576 const struct bridge_vlan_info *last, 577 struct netlink_ext_ack *extack) 578 { 579 /* pvid flag is not allowed in ranges */ 580 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 581 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 582 return false; 583 } 584 585 /* when cur is the range end, check if: 586 * - it has range start flag 587 * - range ids are invalid (end is equal to or before start) 588 */ 589 if (last) { 590 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 591 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 592 return false; 593 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 594 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 595 return false; 596 } else if (cur->vid <= last->vid) { 597 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 598 return false; 599 } 600 } 601 602 /* check for required range flags */ 603 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 604 BRIDGE_VLAN_INFO_RANGE_END))) { 605 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 606 return false; 607 } 608 609 return true; 610 } 611 612 static inline int br_afspec_cmd_to_rtm(int cmd) 613 { 614 switch (cmd) { 615 case RTM_SETLINK: 616 return RTM_NEWVLAN; 617 case RTM_DELLINK: 618 return RTM_DELVLAN; 619 } 620 621 return 0; 622 } 623 624 static inline int br_opt_get(const struct net_bridge *br, 625 enum net_bridge_opts opt) 626 { 627 return test_bit(opt, &br->options); 628 } 629 630 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 631 struct netlink_ext_ack *extack); 632 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 633 int br_boolopt_multi_toggle(struct net_bridge *br, 634 struct br_boolopt_multi *bm, 635 struct netlink_ext_ack *extack); 636 void br_boolopt_multi_get(const struct net_bridge *br, 637 struct br_boolopt_multi *bm); 638 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 639 640 /* br_device.c */ 641 void br_dev_setup(struct net_device *dev); 642 void br_dev_delete(struct net_device *dev, struct list_head *list); 643 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 644 #ifdef CONFIG_NET_POLL_CONTROLLER 645 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 646 struct sk_buff *skb) 647 { 648 netpoll_send_skb(p->np, skb); 649 } 650 651 int br_netpoll_enable(struct net_bridge_port *p); 652 void br_netpoll_disable(struct net_bridge_port *p); 653 #else 654 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 655 struct sk_buff *skb) 656 { 657 } 658 659 static inline int br_netpoll_enable(struct net_bridge_port *p) 660 { 661 return 0; 662 } 663 664 static inline void br_netpoll_disable(struct net_bridge_port *p) 665 { 666 } 667 #endif 668 669 /* br_fdb.c */ 670 int br_fdb_init(void); 671 void br_fdb_fini(void); 672 int br_fdb_hash_init(struct net_bridge *br); 673 void br_fdb_hash_fini(struct net_bridge *br); 674 void br_fdb_flush(struct net_bridge *br); 675 void br_fdb_find_delete_local(struct net_bridge *br, 676 const struct net_bridge_port *p, 677 const unsigned char *addr, u16 vid); 678 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 679 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 680 void br_fdb_cleanup(struct work_struct *work); 681 void br_fdb_delete_by_port(struct net_bridge *br, 682 const struct net_bridge_port *p, u16 vid, int do_all); 683 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 684 const unsigned char *addr, 685 __u16 vid); 686 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 687 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 688 unsigned long off); 689 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 690 const unsigned char *addr, u16 vid); 691 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 692 const unsigned char *addr, u16 vid, unsigned long flags); 693 694 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 695 struct net_device *dev, const unsigned char *addr, u16 vid); 696 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 697 const unsigned char *addr, u16 vid, u16 nlh_flags, 698 struct netlink_ext_ack *extack); 699 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 700 struct net_device *dev, struct net_device *fdev, int *idx); 701 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 702 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 703 struct netlink_ext_ack *extack); 704 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 705 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 706 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 707 const unsigned char *addr, u16 vid, 708 bool swdev_notify); 709 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 710 const unsigned char *addr, u16 vid, 711 bool swdev_notify); 712 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 713 const unsigned char *addr, u16 vid, bool offloaded); 714 715 /* br_forward.c */ 716 enum br_pkt_type { 717 BR_PKT_UNICAST, 718 BR_PKT_MULTICAST, 719 BR_PKT_BROADCAST 720 }; 721 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 722 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 723 bool local_rcv, bool local_orig); 724 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 725 void br_flood(struct net_bridge *br, struct sk_buff *skb, 726 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 727 728 /* return true if both source port and dest port are isolated */ 729 static inline bool br_skb_isolated(const struct net_bridge_port *to, 730 const struct sk_buff *skb) 731 { 732 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 733 (to->flags & BR_ISOLATED); 734 } 735 736 /* br_if.c */ 737 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 738 int br_add_bridge(struct net *net, const char *name); 739 int br_del_bridge(struct net *net, const char *name); 740 int br_add_if(struct net_bridge *br, struct net_device *dev, 741 struct netlink_ext_ack *extack); 742 int br_del_if(struct net_bridge *br, struct net_device *dev); 743 void br_mtu_auto_adjust(struct net_bridge *br); 744 netdev_features_t br_features_recompute(struct net_bridge *br, 745 netdev_features_t features); 746 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 747 void br_manage_promisc(struct net_bridge *br); 748 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 749 750 /* br_input.c */ 751 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 752 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 753 754 struct br_frame_type { 755 __be16 type; 756 int (*frame_handler)(struct net_bridge_port *port, 757 struct sk_buff *skb); 758 struct hlist_node list; 759 }; 760 761 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 762 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 763 764 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 765 { 766 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 767 } 768 769 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 770 { 771 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 772 } 773 774 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 775 { 776 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 777 } 778 779 static inline struct net_bridge_port * 780 br_port_get_check_rtnl(const struct net_device *dev) 781 { 782 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 783 } 784 785 /* br_ioctl.c */ 786 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 787 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 788 void __user *arg); 789 790 /* br_multicast.c */ 791 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 792 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 793 struct sk_buff *skb, u16 vid); 794 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 795 struct sk_buff *skb, u16 vid); 796 int br_multicast_add_port(struct net_bridge_port *port); 797 void br_multicast_del_port(struct net_bridge_port *port); 798 void br_multicast_enable_port(struct net_bridge_port *port); 799 void br_multicast_disable_port(struct net_bridge_port *port); 800 void br_multicast_init(struct net_bridge *br); 801 void br_multicast_open(struct net_bridge *br); 802 void br_multicast_stop(struct net_bridge *br); 803 void br_multicast_dev_del(struct net_bridge *br); 804 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 805 struct sk_buff *skb, bool local_rcv, bool local_orig); 806 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 807 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 808 int br_multicast_toggle(struct net_bridge *br, unsigned long val); 809 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 810 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 811 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 812 #if IS_ENABLED(CONFIG_IPV6) 813 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 814 #endif 815 struct net_bridge_mdb_entry * 816 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 817 struct net_bridge_mdb_entry * 818 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 819 struct net_bridge_port_group * 820 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 821 struct net_bridge_port_group __rcu *next, 822 unsigned char flags, const unsigned char *src, 823 u8 filter_mode, u8 rt_protocol); 824 int br_mdb_hash_init(struct net_bridge *br); 825 void br_mdb_hash_fini(struct net_bridge *br); 826 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 827 struct net_bridge_port_group *pg, int type); 828 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 829 int type); 830 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 831 struct net_bridge_port_group *pg, 832 struct net_bridge_port_group __rcu **pp); 833 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 834 const struct sk_buff *skb, u8 type, u8 dir); 835 int br_multicast_init_stats(struct net_bridge *br); 836 void br_multicast_uninit_stats(struct net_bridge *br); 837 void br_multicast_get_stats(const struct net_bridge *br, 838 const struct net_bridge_port *p, 839 struct br_mcast_stats *dest); 840 void br_mdb_init(void); 841 void br_mdb_uninit(void); 842 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 843 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 844 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 845 u8 filter_mode); 846 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 847 struct net_bridge_port_group *sg); 848 849 static inline bool br_group_is_l2(const struct br_ip *group) 850 { 851 return group->proto == 0; 852 } 853 854 #define mlock_dereference(X, br) \ 855 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 856 857 static inline bool br_multicast_is_router(struct net_bridge *br) 858 { 859 return br->multicast_router == 2 || 860 (br->multicast_router == 1 && 861 timer_pending(&br->multicast_router_timer)); 862 } 863 864 static inline bool 865 __br_multicast_querier_exists(struct net_bridge *br, 866 struct bridge_mcast_other_query *querier, 867 const bool is_ipv6) 868 { 869 bool own_querier_enabled; 870 871 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 872 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 873 own_querier_enabled = false; 874 else 875 own_querier_enabled = true; 876 } else { 877 own_querier_enabled = false; 878 } 879 880 return time_is_before_jiffies(querier->delay_time) && 881 (own_querier_enabled || timer_pending(&querier->timer)); 882 } 883 884 static inline bool br_multicast_querier_exists(struct net_bridge *br, 885 struct ethhdr *eth, 886 const struct net_bridge_mdb_entry *mdb) 887 { 888 switch (eth->h_proto) { 889 case (htons(ETH_P_IP)): 890 return __br_multicast_querier_exists(br, 891 &br->ip4_other_query, false); 892 #if IS_ENABLED(CONFIG_IPV6) 893 case (htons(ETH_P_IPV6)): 894 return __br_multicast_querier_exists(br, 895 &br->ip6_other_query, true); 896 #endif 897 default: 898 return !!mdb && br_group_is_l2(&mdb->addr); 899 } 900 } 901 902 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 903 { 904 switch (ip->proto) { 905 case htons(ETH_P_IP): 906 return ipv4_is_zeronet(ip->src.ip4); 907 #if IS_ENABLED(CONFIG_IPV6) 908 case htons(ETH_P_IPV6): 909 return ipv6_addr_any(&ip->src.ip6); 910 #endif 911 default: 912 return false; 913 } 914 } 915 916 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 917 __be16 proto) 918 { 919 switch (proto) { 920 case htons(ETH_P_IP): 921 return !!(br->multicast_igmp_version == 3); 922 #if IS_ENABLED(CONFIG_IPV6) 923 case htons(ETH_P_IPV6): 924 return !!(br->multicast_mld_version == 2); 925 #endif 926 default: 927 return false; 928 } 929 } 930 931 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 932 { 933 return BR_INPUT_SKB_CB(skb)->igmp; 934 } 935 936 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 937 { 938 return br->multicast_last_member_interval * 939 br->multicast_last_member_count; 940 } 941 942 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 943 { 944 /* use the RFC default of 2 for QRV */ 945 return 2 * br->multicast_query_interval + 946 br->multicast_query_response_interval; 947 } 948 #else 949 static inline int br_multicast_rcv(struct net_bridge *br, 950 struct net_bridge_port *port, 951 struct sk_buff *skb, 952 u16 vid) 953 { 954 return 0; 955 } 956 957 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 958 struct sk_buff *skb, u16 vid) 959 { 960 return NULL; 961 } 962 963 static inline int br_multicast_add_port(struct net_bridge_port *port) 964 { 965 return 0; 966 } 967 968 static inline void br_multicast_del_port(struct net_bridge_port *port) 969 { 970 } 971 972 static inline void br_multicast_enable_port(struct net_bridge_port *port) 973 { 974 } 975 976 static inline void br_multicast_disable_port(struct net_bridge_port *port) 977 { 978 } 979 980 static inline void br_multicast_init(struct net_bridge *br) 981 { 982 } 983 984 static inline void br_multicast_open(struct net_bridge *br) 985 { 986 } 987 988 static inline void br_multicast_stop(struct net_bridge *br) 989 { 990 } 991 992 static inline void br_multicast_dev_del(struct net_bridge *br) 993 { 994 } 995 996 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 997 struct sk_buff *skb, 998 bool local_rcv, bool local_orig) 999 { 1000 } 1001 1002 static inline bool br_multicast_is_router(struct net_bridge *br) 1003 { 1004 return false; 1005 } 1006 1007 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1008 struct ethhdr *eth, 1009 const struct net_bridge_mdb_entry *mdb) 1010 { 1011 return false; 1012 } 1013 1014 static inline void br_mdb_init(void) 1015 { 1016 } 1017 1018 static inline void br_mdb_uninit(void) 1019 { 1020 } 1021 1022 static inline int br_mdb_hash_init(struct net_bridge *br) 1023 { 1024 return 0; 1025 } 1026 1027 static inline void br_mdb_hash_fini(struct net_bridge *br) 1028 { 1029 } 1030 1031 static inline void br_multicast_count(struct net_bridge *br, 1032 const struct net_bridge_port *p, 1033 const struct sk_buff *skb, 1034 u8 type, u8 dir) 1035 { 1036 } 1037 1038 static inline int br_multicast_init_stats(struct net_bridge *br) 1039 { 1040 return 0; 1041 } 1042 1043 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1044 { 1045 } 1046 1047 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1048 { 1049 return 0; 1050 } 1051 #endif 1052 1053 /* br_vlan.c */ 1054 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1055 bool br_allowed_ingress(const struct net_bridge *br, 1056 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1057 u16 *vid, u8 *state); 1058 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1059 const struct sk_buff *skb); 1060 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1061 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1062 const struct net_bridge_port *port, 1063 struct net_bridge_vlan_group *vg, 1064 struct sk_buff *skb); 1065 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1066 bool *changed, struct netlink_ext_ack *extack); 1067 int br_vlan_delete(struct net_bridge *br, u16 vid); 1068 void br_vlan_flush(struct net_bridge *br); 1069 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1070 void br_recalculate_fwd_mask(struct net_bridge *br); 1071 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1072 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); 1073 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto); 1074 int br_vlan_set_proto(struct net_bridge *br, unsigned long val); 1075 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1076 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1077 int br_vlan_init(struct net_bridge *br); 1078 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); 1079 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1080 struct netlink_ext_ack *extack); 1081 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1082 bool *changed, struct netlink_ext_ack *extack); 1083 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1084 void nbp_vlan_flush(struct net_bridge_port *port); 1085 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1086 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1087 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1088 struct pcpu_sw_netstats *stats); 1089 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1090 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1091 void *ptr); 1092 void br_vlan_rtnl_init(void); 1093 void br_vlan_rtnl_uninit(void); 1094 void br_vlan_notify(const struct net_bridge *br, 1095 const struct net_bridge_port *p, 1096 u16 vid, u16 vid_range, 1097 int cmd); 1098 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1099 const struct net_bridge_vlan *range_end); 1100 1101 static inline struct net_bridge_vlan_group *br_vlan_group( 1102 const struct net_bridge *br) 1103 { 1104 return rtnl_dereference(br->vlgrp); 1105 } 1106 1107 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1108 const struct net_bridge_port *p) 1109 { 1110 return rtnl_dereference(p->vlgrp); 1111 } 1112 1113 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1114 const struct net_bridge *br) 1115 { 1116 return rcu_dereference(br->vlgrp); 1117 } 1118 1119 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1120 const struct net_bridge_port *p) 1121 { 1122 return rcu_dereference(p->vlgrp); 1123 } 1124 1125 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1126 * skb, the vlan tag will always be present if the frame was tagged. 1127 */ 1128 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1129 { 1130 int err = 0; 1131 1132 if (skb_vlan_tag_present(skb)) { 1133 *vid = skb_vlan_tag_get_id(skb); 1134 } else { 1135 *vid = 0; 1136 err = -EINVAL; 1137 } 1138 1139 return err; 1140 } 1141 1142 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1143 { 1144 if (!vg) 1145 return 0; 1146 1147 smp_rmb(); 1148 return vg->pvid; 1149 } 1150 1151 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1152 { 1153 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1154 } 1155 #else 1156 static inline bool br_allowed_ingress(const struct net_bridge *br, 1157 struct net_bridge_vlan_group *vg, 1158 struct sk_buff *skb, 1159 u16 *vid, u8 *state) 1160 { 1161 return true; 1162 } 1163 1164 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1165 const struct sk_buff *skb) 1166 { 1167 return true; 1168 } 1169 1170 static inline bool br_should_learn(struct net_bridge_port *p, 1171 struct sk_buff *skb, u16 *vid) 1172 { 1173 return true; 1174 } 1175 1176 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1177 const struct net_bridge_port *port, 1178 struct net_bridge_vlan_group *vg, 1179 struct sk_buff *skb) 1180 { 1181 return skb; 1182 } 1183 1184 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1185 bool *changed, struct netlink_ext_ack *extack) 1186 { 1187 *changed = false; 1188 return -EOPNOTSUPP; 1189 } 1190 1191 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1192 { 1193 return -EOPNOTSUPP; 1194 } 1195 1196 static inline void br_vlan_flush(struct net_bridge *br) 1197 { 1198 } 1199 1200 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1201 { 1202 } 1203 1204 static inline int br_vlan_init(struct net_bridge *br) 1205 { 1206 return 0; 1207 } 1208 1209 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1210 bool *changed, struct netlink_ext_ack *extack) 1211 { 1212 *changed = false; 1213 return -EOPNOTSUPP; 1214 } 1215 1216 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1217 { 1218 return -EOPNOTSUPP; 1219 } 1220 1221 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1222 { 1223 } 1224 1225 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1226 u16 vid) 1227 { 1228 return NULL; 1229 } 1230 1231 static inline int nbp_vlan_init(struct net_bridge_port *port, 1232 struct netlink_ext_ack *extack) 1233 { 1234 return 0; 1235 } 1236 1237 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1238 { 1239 return 0; 1240 } 1241 1242 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1243 { 1244 return 0; 1245 } 1246 1247 static inline int __br_vlan_filter_toggle(struct net_bridge *br, 1248 unsigned long val) 1249 { 1250 return -EOPNOTSUPP; 1251 } 1252 1253 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1254 u32 filter_mask) 1255 { 1256 return 0; 1257 } 1258 1259 static inline struct net_bridge_vlan_group *br_vlan_group( 1260 const struct net_bridge *br) 1261 { 1262 return NULL; 1263 } 1264 1265 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1266 const struct net_bridge_port *p) 1267 { 1268 return NULL; 1269 } 1270 1271 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1272 const struct net_bridge *br) 1273 { 1274 return NULL; 1275 } 1276 1277 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1278 const struct net_bridge_port *p) 1279 { 1280 return NULL; 1281 } 1282 1283 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1284 struct pcpu_sw_netstats *stats) 1285 { 1286 } 1287 1288 static inline void br_vlan_port_event(struct net_bridge_port *p, 1289 unsigned long event) 1290 { 1291 } 1292 1293 static inline int br_vlan_bridge_event(struct net_device *dev, 1294 unsigned long event, void *ptr) 1295 { 1296 return 0; 1297 } 1298 1299 static inline void br_vlan_rtnl_init(void) 1300 { 1301 } 1302 1303 static inline void br_vlan_rtnl_uninit(void) 1304 { 1305 } 1306 1307 static inline void br_vlan_notify(const struct net_bridge *br, 1308 const struct net_bridge_port *p, 1309 u16 vid, u16 vid_range, 1310 int cmd) 1311 { 1312 } 1313 1314 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1315 const struct net_bridge_vlan *range_end) 1316 { 1317 return true; 1318 } 1319 #endif 1320 1321 /* br_vlan_options.c */ 1322 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1323 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1324 const struct net_bridge_vlan *range_end); 1325 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1326 size_t br_vlan_opts_nl_size(void); 1327 int br_vlan_process_options(const struct net_bridge *br, 1328 const struct net_bridge_port *p, 1329 struct net_bridge_vlan *range_start, 1330 struct net_bridge_vlan *range_end, 1331 struct nlattr **tb, 1332 struct netlink_ext_ack *extack); 1333 1334 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1335 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1336 { 1337 return READ_ONCE(v->state); 1338 } 1339 1340 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1341 { 1342 WRITE_ONCE(v->state, state); 1343 } 1344 1345 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1346 { 1347 return READ_ONCE(vg->pvid_state); 1348 } 1349 1350 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1351 u8 state) 1352 { 1353 WRITE_ONCE(vg->pvid_state, state); 1354 } 1355 1356 /* learn_allow is true at ingress and false at egress */ 1357 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1358 { 1359 switch (state) { 1360 case BR_STATE_LEARNING: 1361 return learn_allow; 1362 case BR_STATE_FORWARDING: 1363 return true; 1364 default: 1365 return false; 1366 } 1367 } 1368 #endif 1369 1370 struct nf_br_ops { 1371 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1372 }; 1373 extern const struct nf_br_ops __rcu *nf_br_ops; 1374 1375 /* br_netfilter.c */ 1376 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1377 int br_nf_core_init(void); 1378 void br_nf_core_fini(void); 1379 void br_netfilter_rtable_init(struct net_bridge *); 1380 #else 1381 static inline int br_nf_core_init(void) { return 0; } 1382 static inline void br_nf_core_fini(void) {} 1383 #define br_netfilter_rtable_init(x) 1384 #endif 1385 1386 /* br_stp.c */ 1387 void br_set_state(struct net_bridge_port *p, unsigned int state); 1388 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1389 void br_init_port(struct net_bridge_port *p); 1390 void br_become_designated_port(struct net_bridge_port *p); 1391 1392 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1393 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1394 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1395 int br_set_max_age(struct net_bridge *br, unsigned long x); 1396 int __set_ageing_time(struct net_device *dev, unsigned long t); 1397 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1398 1399 1400 /* br_stp_if.c */ 1401 void br_stp_enable_bridge(struct net_bridge *br); 1402 void br_stp_disable_bridge(struct net_bridge *br); 1403 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1404 struct netlink_ext_ack *extack); 1405 void br_stp_enable_port(struct net_bridge_port *p); 1406 void br_stp_disable_port(struct net_bridge_port *p); 1407 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1408 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1409 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1410 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1411 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1412 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1413 1414 /* br_stp_bpdu.c */ 1415 struct stp_proto; 1416 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1417 struct net_device *dev); 1418 1419 /* br_stp_timer.c */ 1420 void br_stp_timer_init(struct net_bridge *br); 1421 void br_stp_port_timer_init(struct net_bridge_port *p); 1422 unsigned long br_timer_value(const struct timer_list *timer); 1423 1424 /* br.c */ 1425 #if IS_ENABLED(CONFIG_ATM_LANE) 1426 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1427 #endif 1428 1429 /* br_mrp.c */ 1430 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1431 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1432 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1433 bool br_mrp_enabled(struct net_bridge *br); 1434 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1435 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1436 #else 1437 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1438 struct nlattr *attr, int cmd, 1439 struct netlink_ext_ack *extack) 1440 { 1441 return -EOPNOTSUPP; 1442 } 1443 1444 static inline bool br_mrp_enabled(struct net_bridge *br) 1445 { 1446 return false; 1447 } 1448 1449 static inline void br_mrp_port_del(struct net_bridge *br, 1450 struct net_bridge_port *p) 1451 { 1452 } 1453 1454 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1455 { 1456 return 0; 1457 } 1458 1459 #endif 1460 1461 /* br_cfm.c */ 1462 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1463 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1464 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1465 bool br_cfm_created(struct net_bridge *br); 1466 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1467 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1468 int br_cfm_status_fill_info(struct sk_buff *skb, 1469 struct net_bridge *br, 1470 bool getlink); 1471 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1472 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1473 #else 1474 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1475 struct nlattr *attr, int cmd, 1476 struct netlink_ext_ack *extack) 1477 { 1478 return -EOPNOTSUPP; 1479 } 1480 1481 static inline bool br_cfm_created(struct net_bridge *br) 1482 { 1483 return false; 1484 } 1485 1486 static inline void br_cfm_port_del(struct net_bridge *br, 1487 struct net_bridge_port *p) 1488 { 1489 } 1490 1491 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1492 { 1493 return -EOPNOTSUPP; 1494 } 1495 1496 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1497 struct net_bridge *br, 1498 bool getlink) 1499 { 1500 return -EOPNOTSUPP; 1501 } 1502 1503 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1504 { 1505 return -EOPNOTSUPP; 1506 } 1507 1508 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1509 { 1510 return -EOPNOTSUPP; 1511 } 1512 #endif 1513 1514 /* br_netlink.c */ 1515 extern struct rtnl_link_ops br_link_ops; 1516 int br_netlink_init(void); 1517 void br_netlink_fini(void); 1518 void br_ifinfo_notify(int event, const struct net_bridge *br, 1519 const struct net_bridge_port *port); 1520 void br_info_notify(int event, const struct net_bridge *br, 1521 const struct net_bridge_port *port, u32 filter); 1522 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1523 struct netlink_ext_ack *extack); 1524 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1525 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1526 u32 filter_mask, int nlflags); 1527 int br_process_vlan_info(struct net_bridge *br, 1528 struct net_bridge_port *p, int cmd, 1529 struct bridge_vlan_info *vinfo_curr, 1530 struct bridge_vlan_info **vinfo_last, 1531 bool *changed, 1532 struct netlink_ext_ack *extack); 1533 1534 #ifdef CONFIG_SYSFS 1535 /* br_sysfs_if.c */ 1536 extern const struct sysfs_ops brport_sysfs_ops; 1537 int br_sysfs_addif(struct net_bridge_port *p); 1538 int br_sysfs_renameif(struct net_bridge_port *p); 1539 1540 /* br_sysfs_br.c */ 1541 int br_sysfs_addbr(struct net_device *dev); 1542 void br_sysfs_delbr(struct net_device *dev); 1543 1544 #else 1545 1546 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1547 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1548 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1549 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1550 #endif /* CONFIG_SYSFS */ 1551 1552 /* br_switchdev.c */ 1553 #ifdef CONFIG_NET_SWITCHDEV 1554 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1555 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1556 struct sk_buff *skb); 1557 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1558 const struct sk_buff *skb); 1559 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1560 unsigned long flags, 1561 unsigned long mask); 1562 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1563 int type); 1564 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1565 struct netlink_ext_ack *extack); 1566 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1567 1568 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1569 { 1570 skb->offload_fwd_mark = 0; 1571 } 1572 #else 1573 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1574 { 1575 return 0; 1576 } 1577 1578 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1579 struct sk_buff *skb) 1580 { 1581 } 1582 1583 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1584 const struct sk_buff *skb) 1585 { 1586 return true; 1587 } 1588 1589 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1590 unsigned long flags, 1591 unsigned long mask) 1592 { 1593 return 0; 1594 } 1595 1596 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1597 u16 vid, u16 flags, 1598 struct netlink_ext_ack *extack) 1599 { 1600 return -EOPNOTSUPP; 1601 } 1602 1603 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1604 { 1605 return -EOPNOTSUPP; 1606 } 1607 1608 static inline void 1609 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1610 { 1611 } 1612 1613 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1614 { 1615 } 1616 #endif /* CONFIG_NET_SWITCHDEV */ 1617 1618 /* br_arp_nd_proxy.c */ 1619 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1620 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1621 u16 vid, struct net_bridge_port *p); 1622 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1623 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1624 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1625 #endif 1626