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 __rcu *tunnel_dst; 95 }; 96 97 /* private vlan flags */ 98 enum { 99 BR_VLFLAG_PER_PORT_STATS = BIT(0), 100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 101 }; 102 103 /** 104 * struct net_bridge_vlan - per-vlan entry 105 * 106 * @vnode: rhashtable member 107 * @vid: VLAN id 108 * @flags: bridge vlan flags 109 * @priv_flags: private (in-kernel) bridge vlan flags 110 * @state: STP state (e.g. blocking, learning, forwarding) 111 * @stats: per-cpu VLAN statistics 112 * @br: if MASTER flag set, this points to a bridge struct 113 * @port: if MASTER flag unset, this points to a port struct 114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 116 * for this VLAN entry 117 * @vlist: sorted list of VLAN entries 118 * @rcu: used for entry destruction 119 * 120 * This structure is shared between the global per-VLAN entries contained in 121 * the bridge rhashtable and the local per-port per-VLAN entries contained in 122 * the port's rhashtable. The union entries should be interpreted depending on 123 * the entry flags that are set. 124 */ 125 struct net_bridge_vlan { 126 struct rhash_head vnode; 127 struct rhash_head tnode; 128 u16 vid; 129 u16 flags; 130 u16 priv_flags; 131 u8 state; 132 struct pcpu_sw_netstats __percpu *stats; 133 union { 134 struct net_bridge *br; 135 struct net_bridge_port *port; 136 }; 137 union { 138 refcount_t refcnt; 139 struct net_bridge_vlan *brvlan; 140 }; 141 142 struct br_tunnel_info tinfo; 143 144 struct list_head vlist; 145 146 struct rcu_head rcu; 147 }; 148 149 /** 150 * struct net_bridge_vlan_group 151 * 152 * @vlan_hash: VLAN entry rhashtable 153 * @vlan_list: sorted VLAN entry list 154 * @num_vlans: number of total VLAN entries 155 * @pvid: PVID VLAN id 156 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 157 * 158 * IMPORTANT: Be careful when checking if there're VLAN entries using list 159 * primitives because the bridge can have entries in its list which 160 * are just for global context but not for filtering, i.e. they have 161 * the master flag set but not the brentry flag. If you have to check 162 * if there're "real" entries in the bridge please test @num_vlans 163 */ 164 struct net_bridge_vlan_group { 165 struct rhashtable vlan_hash; 166 struct rhashtable tunnel_hash; 167 struct list_head vlan_list; 168 u16 num_vlans; 169 u16 pvid; 170 u8 pvid_state; 171 }; 172 173 /* bridge fdb flags */ 174 enum { 175 BR_FDB_LOCAL, 176 BR_FDB_STATIC, 177 BR_FDB_STICKY, 178 BR_FDB_ADDED_BY_USER, 179 BR_FDB_ADDED_BY_EXT_LEARN, 180 BR_FDB_OFFLOADED, 181 BR_FDB_NOTIFY, 182 BR_FDB_NOTIFY_INACTIVE 183 }; 184 185 struct net_bridge_fdb_key { 186 mac_addr addr; 187 u16 vlan_id; 188 }; 189 190 struct net_bridge_fdb_entry { 191 struct rhash_head rhnode; 192 struct net_bridge_port *dst; 193 194 struct net_bridge_fdb_key key; 195 struct hlist_node fdb_node; 196 unsigned long flags; 197 198 /* write-heavy members should not affect lookups */ 199 unsigned long updated ____cacheline_aligned_in_smp; 200 unsigned long used; 201 202 struct rcu_head rcu; 203 }; 204 205 #define MDB_PG_FLAGS_PERMANENT BIT(0) 206 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 208 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 209 #define MDB_PG_FLAGS_BLOCKED BIT(4) 210 211 #define PG_SRC_ENT_LIMIT 32 212 213 #define BR_SGRP_F_DELETE BIT(0) 214 #define BR_SGRP_F_SEND BIT(1) 215 #define BR_SGRP_F_INSTALLED BIT(2) 216 217 struct net_bridge_mcast_gc { 218 struct hlist_node gc_node; 219 void (*destroy)(struct net_bridge_mcast_gc *gc); 220 }; 221 222 struct net_bridge_group_src { 223 struct hlist_node node; 224 225 struct br_ip addr; 226 struct net_bridge_port_group *pg; 227 u8 flags; 228 u8 src_query_rexmit_cnt; 229 struct timer_list timer; 230 231 struct net_bridge *br; 232 struct net_bridge_mcast_gc mcast_gc; 233 struct rcu_head rcu; 234 }; 235 236 struct net_bridge_port_group_sg_key { 237 struct net_bridge_port *port; 238 struct br_ip addr; 239 }; 240 241 struct net_bridge_port_group { 242 struct net_bridge_port_group __rcu *next; 243 struct net_bridge_port_group_sg_key key; 244 unsigned char eth_addr[ETH_ALEN] __aligned(2); 245 unsigned char flags; 246 unsigned char filter_mode; 247 unsigned char grp_query_rexmit_cnt; 248 unsigned char rt_protocol; 249 250 struct hlist_head src_list; 251 unsigned int src_ents; 252 struct timer_list timer; 253 struct timer_list rexmit_timer; 254 struct hlist_node mglist; 255 struct rb_root eht_set_tree; 256 struct rb_root eht_host_tree; 257 258 struct rhash_head rhnode; 259 struct net_bridge_mcast_gc mcast_gc; 260 struct rcu_head rcu; 261 }; 262 263 struct net_bridge_mdb_entry { 264 struct rhash_head rhnode; 265 struct net_bridge *br; 266 struct net_bridge_port_group __rcu *ports; 267 struct br_ip addr; 268 bool host_joined; 269 270 struct timer_list timer; 271 struct hlist_node mdb_node; 272 273 struct net_bridge_mcast_gc mcast_gc; 274 struct rcu_head rcu; 275 }; 276 277 struct net_bridge_port { 278 struct net_bridge *br; 279 struct net_device *dev; 280 struct list_head list; 281 282 unsigned long flags; 283 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 284 struct net_bridge_vlan_group __rcu *vlgrp; 285 #endif 286 struct net_bridge_port __rcu *backup_port; 287 288 /* STP */ 289 u8 priority; 290 u8 state; 291 u16 port_no; 292 unsigned char topology_change_ack; 293 unsigned char config_pending; 294 port_id port_id; 295 port_id designated_port; 296 bridge_id designated_root; 297 bridge_id designated_bridge; 298 u32 path_cost; 299 u32 designated_cost; 300 unsigned long designated_age; 301 302 struct timer_list forward_delay_timer; 303 struct timer_list hold_timer; 304 struct timer_list message_age_timer; 305 struct kobject kobj; 306 struct rcu_head rcu; 307 308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 309 struct bridge_mcast_own_query ip4_own_query; 310 #if IS_ENABLED(CONFIG_IPV6) 311 struct bridge_mcast_own_query ip6_own_query; 312 #endif /* IS_ENABLED(CONFIG_IPV6) */ 313 u32 multicast_eht_hosts_limit; 314 u32 multicast_eht_hosts_cnt; 315 unsigned char multicast_router; 316 struct bridge_mcast_stats __percpu *mcast_stats; 317 struct timer_list multicast_router_timer; 318 struct hlist_head mglist; 319 struct hlist_node rlist; 320 #endif 321 322 #ifdef CONFIG_SYSFS 323 char sysfs_name[IFNAMSIZ]; 324 #endif 325 326 #ifdef CONFIG_NET_POLL_CONTROLLER 327 struct netpoll *np; 328 #endif 329 #ifdef CONFIG_NET_SWITCHDEV 330 int offload_fwd_mark; 331 #endif 332 u16 group_fwd_mask; 333 u16 backup_redirected_cnt; 334 335 struct bridge_stp_xstats stp_xstats; 336 }; 337 338 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 339 340 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 341 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 342 343 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 344 { 345 return rcu_dereference(dev->rx_handler_data); 346 } 347 348 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 349 { 350 return netif_is_bridge_port(dev) ? 351 rtnl_dereference(dev->rx_handler_data) : NULL; 352 } 353 354 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 355 { 356 return netif_is_bridge_port(dev) ? 357 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 358 } 359 360 enum net_bridge_opts { 361 BROPT_VLAN_ENABLED, 362 BROPT_VLAN_STATS_ENABLED, 363 BROPT_NF_CALL_IPTABLES, 364 BROPT_NF_CALL_IP6TABLES, 365 BROPT_NF_CALL_ARPTABLES, 366 BROPT_GROUP_ADDR_SET, 367 BROPT_MULTICAST_ENABLED, 368 BROPT_MULTICAST_QUERIER, 369 BROPT_MULTICAST_QUERY_USE_IFADDR, 370 BROPT_MULTICAST_STATS_ENABLED, 371 BROPT_HAS_IPV6_ADDR, 372 BROPT_NEIGH_SUPPRESS_ENABLED, 373 BROPT_MTU_SET_BY_USER, 374 BROPT_VLAN_STATS_PER_PORT, 375 BROPT_NO_LL_LEARN, 376 BROPT_VLAN_BRIDGE_BINDING, 377 }; 378 379 struct net_bridge { 380 spinlock_t lock; 381 spinlock_t hash_lock; 382 struct hlist_head frame_type_list; 383 struct net_device *dev; 384 unsigned long options; 385 /* These fields are accessed on each packet */ 386 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 387 __be16 vlan_proto; 388 u16 default_pvid; 389 struct net_bridge_vlan_group __rcu *vlgrp; 390 #endif 391 392 struct rhashtable fdb_hash_tbl; 393 struct list_head port_list; 394 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 395 union { 396 struct rtable fake_rtable; 397 struct rt6_info fake_rt6_info; 398 }; 399 #endif 400 u16 group_fwd_mask; 401 u16 group_fwd_mask_required; 402 403 /* STP */ 404 bridge_id designated_root; 405 bridge_id bridge_id; 406 unsigned char topology_change; 407 unsigned char topology_change_detected; 408 u16 root_port; 409 unsigned long max_age; 410 unsigned long hello_time; 411 unsigned long forward_delay; 412 unsigned long ageing_time; 413 unsigned long bridge_max_age; 414 unsigned long bridge_hello_time; 415 unsigned long bridge_forward_delay; 416 unsigned long bridge_ageing_time; 417 u32 root_path_cost; 418 419 u8 group_addr[ETH_ALEN]; 420 421 enum { 422 BR_NO_STP, /* no spanning tree */ 423 BR_KERNEL_STP, /* old STP in kernel */ 424 BR_USER_STP, /* new RSTP in userspace */ 425 } stp_enabled; 426 427 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 428 429 u32 hash_max; 430 431 u32 multicast_last_member_count; 432 u32 multicast_startup_query_count; 433 434 u8 multicast_igmp_version; 435 u8 multicast_router; 436 #if IS_ENABLED(CONFIG_IPV6) 437 u8 multicast_mld_version; 438 #endif 439 spinlock_t multicast_lock; 440 unsigned long multicast_last_member_interval; 441 unsigned long multicast_membership_interval; 442 unsigned long multicast_querier_interval; 443 unsigned long multicast_query_interval; 444 unsigned long multicast_query_response_interval; 445 unsigned long multicast_startup_query_interval; 446 447 struct rhashtable mdb_hash_tbl; 448 struct rhashtable sg_port_tbl; 449 450 struct hlist_head mcast_gc_list; 451 struct hlist_head mdb_list; 452 struct hlist_head router_list; 453 454 struct timer_list multicast_router_timer; 455 struct bridge_mcast_other_query ip4_other_query; 456 struct bridge_mcast_own_query ip4_own_query; 457 struct bridge_mcast_querier ip4_querier; 458 struct bridge_mcast_stats __percpu *mcast_stats; 459 #if IS_ENABLED(CONFIG_IPV6) 460 struct bridge_mcast_other_query ip6_other_query; 461 struct bridge_mcast_own_query ip6_own_query; 462 struct bridge_mcast_querier ip6_querier; 463 #endif /* IS_ENABLED(CONFIG_IPV6) */ 464 struct work_struct mcast_gc_work; 465 #endif 466 467 struct timer_list hello_timer; 468 struct timer_list tcn_timer; 469 struct timer_list topology_change_timer; 470 struct delayed_work gc_work; 471 struct kobject *ifobj; 472 u32 auto_cnt; 473 474 #ifdef CONFIG_NET_SWITCHDEV 475 int offload_fwd_mark; 476 #endif 477 struct hlist_head fdb_list; 478 479 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 480 struct hlist_head mrp_list; 481 #endif 482 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 483 struct hlist_head mep_list; 484 #endif 485 }; 486 487 struct br_input_skb_cb { 488 struct net_device *brdev; 489 490 u16 frag_max_size; 491 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 492 u8 igmp; 493 u8 mrouters_only:1; 494 #endif 495 u8 proxyarp_replied:1; 496 u8 src_port_isolated:1; 497 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 498 u8 vlan_filtered:1; 499 #endif 500 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 501 u8 br_netfilter_broute:1; 502 #endif 503 504 #ifdef CONFIG_NET_SWITCHDEV 505 int offload_fwd_mark; 506 #endif 507 }; 508 509 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 510 511 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 512 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 513 #else 514 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 515 #endif 516 517 #define br_printk(level, br, format, args...) \ 518 printk(level "%s: " format, (br)->dev->name, ##args) 519 520 #define br_err(__br, format, args...) \ 521 br_printk(KERN_ERR, __br, format, ##args) 522 #define br_warn(__br, format, args...) \ 523 br_printk(KERN_WARNING, __br, format, ##args) 524 #define br_notice(__br, format, args...) \ 525 br_printk(KERN_NOTICE, __br, format, ##args) 526 #define br_info(__br, format, args...) \ 527 br_printk(KERN_INFO, __br, format, ##args) 528 529 #define br_debug(br, format, args...) \ 530 pr_debug("%s: " format, (br)->dev->name, ##args) 531 532 /* called under bridge lock */ 533 static inline int br_is_root_bridge(const struct net_bridge *br) 534 { 535 return !memcmp(&br->bridge_id, &br->designated_root, 8); 536 } 537 538 /* check if a VLAN entry is global */ 539 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 540 { 541 return v->flags & BRIDGE_VLAN_INFO_MASTER; 542 } 543 544 /* check if a VLAN entry is used by the bridge */ 545 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 546 { 547 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 548 } 549 550 /* check if we should use the vlan entry, returns false if it's only context */ 551 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 552 { 553 if (br_vlan_is_master(v)) { 554 if (br_vlan_is_brentry(v)) 555 return true; 556 else 557 return false; 558 } 559 560 return true; 561 } 562 563 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 564 { 565 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 566 } 567 568 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 569 { 570 bool ret = vid > 0 && vid < VLAN_VID_MASK; 571 572 if (!ret) 573 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 574 575 return ret; 576 } 577 578 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 579 const struct bridge_vlan_info *last, 580 struct netlink_ext_ack *extack) 581 { 582 /* pvid flag is not allowed in ranges */ 583 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 584 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 585 return false; 586 } 587 588 /* when cur is the range end, check if: 589 * - it has range start flag 590 * - range ids are invalid (end is equal to or before start) 591 */ 592 if (last) { 593 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 594 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 595 return false; 596 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 597 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 598 return false; 599 } else if (cur->vid <= last->vid) { 600 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 601 return false; 602 } 603 } 604 605 /* check for required range flags */ 606 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 607 BRIDGE_VLAN_INFO_RANGE_END))) { 608 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 609 return false; 610 } 611 612 return true; 613 } 614 615 static inline int br_afspec_cmd_to_rtm(int cmd) 616 { 617 switch (cmd) { 618 case RTM_SETLINK: 619 return RTM_NEWVLAN; 620 case RTM_DELLINK: 621 return RTM_DELVLAN; 622 } 623 624 return 0; 625 } 626 627 static inline int br_opt_get(const struct net_bridge *br, 628 enum net_bridge_opts opt) 629 { 630 return test_bit(opt, &br->options); 631 } 632 633 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 634 struct netlink_ext_ack *extack); 635 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 636 int br_boolopt_multi_toggle(struct net_bridge *br, 637 struct br_boolopt_multi *bm, 638 struct netlink_ext_ack *extack); 639 void br_boolopt_multi_get(const struct net_bridge *br, 640 struct br_boolopt_multi *bm); 641 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 642 643 /* br_device.c */ 644 void br_dev_setup(struct net_device *dev); 645 void br_dev_delete(struct net_device *dev, struct list_head *list); 646 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 647 #ifdef CONFIG_NET_POLL_CONTROLLER 648 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 649 struct sk_buff *skb) 650 { 651 netpoll_send_skb(p->np, skb); 652 } 653 654 int br_netpoll_enable(struct net_bridge_port *p); 655 void br_netpoll_disable(struct net_bridge_port *p); 656 #else 657 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 658 struct sk_buff *skb) 659 { 660 } 661 662 static inline int br_netpoll_enable(struct net_bridge_port *p) 663 { 664 return 0; 665 } 666 667 static inline void br_netpoll_disable(struct net_bridge_port *p) 668 { 669 } 670 #endif 671 672 /* br_fdb.c */ 673 int br_fdb_init(void); 674 void br_fdb_fini(void); 675 int br_fdb_hash_init(struct net_bridge *br); 676 void br_fdb_hash_fini(struct net_bridge *br); 677 void br_fdb_flush(struct net_bridge *br); 678 void br_fdb_find_delete_local(struct net_bridge *br, 679 const struct net_bridge_port *p, 680 const unsigned char *addr, u16 vid); 681 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 682 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 683 void br_fdb_cleanup(struct work_struct *work); 684 void br_fdb_delete_by_port(struct net_bridge *br, 685 const struct net_bridge_port *p, u16 vid, int do_all); 686 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 687 const unsigned char *addr, 688 __u16 vid); 689 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 690 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 691 unsigned long off); 692 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 693 const unsigned char *addr, u16 vid); 694 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 695 const unsigned char *addr, u16 vid, unsigned long flags); 696 697 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 698 struct net_device *dev, const unsigned char *addr, u16 vid); 699 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 700 const unsigned char *addr, u16 vid, u16 nlh_flags, 701 struct netlink_ext_ack *extack); 702 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 703 struct net_device *dev, struct net_device *fdev, int *idx); 704 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 705 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 706 struct netlink_ext_ack *extack); 707 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 708 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 709 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 710 const unsigned char *addr, u16 vid, 711 bool swdev_notify); 712 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 713 const unsigned char *addr, u16 vid, 714 bool swdev_notify); 715 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 716 const unsigned char *addr, u16 vid, bool offloaded); 717 718 /* br_forward.c */ 719 enum br_pkt_type { 720 BR_PKT_UNICAST, 721 BR_PKT_MULTICAST, 722 BR_PKT_BROADCAST 723 }; 724 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 725 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 726 bool local_rcv, bool local_orig); 727 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 728 void br_flood(struct net_bridge *br, struct sk_buff *skb, 729 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 730 731 /* return true if both source port and dest port are isolated */ 732 static inline bool br_skb_isolated(const struct net_bridge_port *to, 733 const struct sk_buff *skb) 734 { 735 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 736 (to->flags & BR_ISOLATED); 737 } 738 739 /* br_if.c */ 740 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 741 int br_add_bridge(struct net *net, const char *name); 742 int br_del_bridge(struct net *net, const char *name); 743 int br_add_if(struct net_bridge *br, struct net_device *dev, 744 struct netlink_ext_ack *extack); 745 int br_del_if(struct net_bridge *br, struct net_device *dev); 746 void br_mtu_auto_adjust(struct net_bridge *br); 747 netdev_features_t br_features_recompute(struct net_bridge *br, 748 netdev_features_t features); 749 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 750 void br_manage_promisc(struct net_bridge *br); 751 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 752 753 /* br_input.c */ 754 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 755 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 756 757 struct br_frame_type { 758 __be16 type; 759 int (*frame_handler)(struct net_bridge_port *port, 760 struct sk_buff *skb); 761 struct hlist_node list; 762 }; 763 764 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 765 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 766 767 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 768 { 769 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 770 } 771 772 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 773 { 774 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 775 } 776 777 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 778 { 779 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 780 } 781 782 static inline struct net_bridge_port * 783 br_port_get_check_rtnl(const struct net_device *dev) 784 { 785 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 786 } 787 788 /* br_ioctl.c */ 789 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 790 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 791 void __user *arg); 792 793 /* br_multicast.c */ 794 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 795 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 796 struct sk_buff *skb, u16 vid); 797 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 798 struct sk_buff *skb, u16 vid); 799 int br_multicast_add_port(struct net_bridge_port *port); 800 void br_multicast_del_port(struct net_bridge_port *port); 801 void br_multicast_enable_port(struct net_bridge_port *port); 802 void br_multicast_disable_port(struct net_bridge_port *port); 803 void br_multicast_init(struct net_bridge *br); 804 void br_multicast_join_snoopers(struct net_bridge *br); 805 void br_multicast_leave_snoopers(struct net_bridge *br); 806 void br_multicast_open(struct net_bridge *br); 807 void br_multicast_stop(struct net_bridge *br); 808 void br_multicast_dev_del(struct net_bridge *br); 809 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 810 struct sk_buff *skb, bool local_rcv, bool local_orig); 811 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 812 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 813 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 814 struct netlink_ext_ack *extack); 815 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 816 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 817 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 818 #if IS_ENABLED(CONFIG_IPV6) 819 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 820 #endif 821 struct net_bridge_mdb_entry * 822 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 823 struct net_bridge_mdb_entry * 824 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 825 struct net_bridge_port_group * 826 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 827 struct net_bridge_port_group __rcu *next, 828 unsigned char flags, const unsigned char *src, 829 u8 filter_mode, u8 rt_protocol); 830 int br_mdb_hash_init(struct net_bridge *br); 831 void br_mdb_hash_fini(struct net_bridge *br); 832 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 833 struct net_bridge_port_group *pg, int type); 834 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 835 int type); 836 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 837 struct net_bridge_port_group *pg, 838 struct net_bridge_port_group __rcu **pp); 839 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 840 const struct sk_buff *skb, u8 type, u8 dir); 841 int br_multicast_init_stats(struct net_bridge *br); 842 void br_multicast_uninit_stats(struct net_bridge *br); 843 void br_multicast_get_stats(const struct net_bridge *br, 844 const struct net_bridge_port *p, 845 struct br_mcast_stats *dest); 846 void br_mdb_init(void); 847 void br_mdb_uninit(void); 848 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 849 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 850 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 851 u8 filter_mode); 852 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 853 struct net_bridge_port_group *sg); 854 struct net_bridge_group_src * 855 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 856 void br_multicast_del_group_src(struct net_bridge_group_src *src, 857 bool fastleave); 858 859 static inline bool br_group_is_l2(const struct br_ip *group) 860 { 861 return group->proto == 0; 862 } 863 864 #define mlock_dereference(X, br) \ 865 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 866 867 static inline bool br_multicast_is_router(struct net_bridge *br) 868 { 869 return br->multicast_router == 2 || 870 (br->multicast_router == 1 && 871 timer_pending(&br->multicast_router_timer)); 872 } 873 874 static inline bool 875 __br_multicast_querier_exists(struct net_bridge *br, 876 struct bridge_mcast_other_query *querier, 877 const bool is_ipv6) 878 { 879 bool own_querier_enabled; 880 881 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 882 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 883 own_querier_enabled = false; 884 else 885 own_querier_enabled = true; 886 } else { 887 own_querier_enabled = false; 888 } 889 890 return time_is_before_jiffies(querier->delay_time) && 891 (own_querier_enabled || timer_pending(&querier->timer)); 892 } 893 894 static inline bool br_multicast_querier_exists(struct net_bridge *br, 895 struct ethhdr *eth, 896 const struct net_bridge_mdb_entry *mdb) 897 { 898 switch (eth->h_proto) { 899 case (htons(ETH_P_IP)): 900 return __br_multicast_querier_exists(br, 901 &br->ip4_other_query, false); 902 #if IS_ENABLED(CONFIG_IPV6) 903 case (htons(ETH_P_IPV6)): 904 return __br_multicast_querier_exists(br, 905 &br->ip6_other_query, true); 906 #endif 907 default: 908 return !!mdb && br_group_is_l2(&mdb->addr); 909 } 910 } 911 912 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 913 { 914 switch (ip->proto) { 915 case htons(ETH_P_IP): 916 return ipv4_is_zeronet(ip->src.ip4); 917 #if IS_ENABLED(CONFIG_IPV6) 918 case htons(ETH_P_IPV6): 919 return ipv6_addr_any(&ip->src.ip6); 920 #endif 921 default: 922 return false; 923 } 924 } 925 926 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 927 __be16 proto) 928 { 929 switch (proto) { 930 case htons(ETH_P_IP): 931 return !!(br->multicast_igmp_version == 3); 932 #if IS_ENABLED(CONFIG_IPV6) 933 case htons(ETH_P_IPV6): 934 return !!(br->multicast_mld_version == 2); 935 #endif 936 default: 937 return false; 938 } 939 } 940 941 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 942 { 943 return BR_INPUT_SKB_CB(skb)->igmp; 944 } 945 946 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 947 { 948 return br->multicast_last_member_interval * 949 br->multicast_last_member_count; 950 } 951 952 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 953 { 954 /* use the RFC default of 2 for QRV */ 955 return 2 * br->multicast_query_interval + 956 br->multicast_query_response_interval; 957 } 958 #else 959 static inline int br_multicast_rcv(struct net_bridge *br, 960 struct net_bridge_port *port, 961 struct sk_buff *skb, 962 u16 vid) 963 { 964 return 0; 965 } 966 967 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 968 struct sk_buff *skb, u16 vid) 969 { 970 return NULL; 971 } 972 973 static inline int br_multicast_add_port(struct net_bridge_port *port) 974 { 975 return 0; 976 } 977 978 static inline void br_multicast_del_port(struct net_bridge_port *port) 979 { 980 } 981 982 static inline void br_multicast_enable_port(struct net_bridge_port *port) 983 { 984 } 985 986 static inline void br_multicast_disable_port(struct net_bridge_port *port) 987 { 988 } 989 990 static inline void br_multicast_init(struct net_bridge *br) 991 { 992 } 993 994 static inline void br_multicast_join_snoopers(struct net_bridge *br) 995 { 996 } 997 998 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 999 { 1000 } 1001 1002 static inline void br_multicast_open(struct net_bridge *br) 1003 { 1004 } 1005 1006 static inline void br_multicast_stop(struct net_bridge *br) 1007 { 1008 } 1009 1010 static inline void br_multicast_dev_del(struct net_bridge *br) 1011 { 1012 } 1013 1014 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1015 struct sk_buff *skb, 1016 bool local_rcv, bool local_orig) 1017 { 1018 } 1019 1020 static inline bool br_multicast_is_router(struct net_bridge *br) 1021 { 1022 return false; 1023 } 1024 1025 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1026 struct ethhdr *eth, 1027 const struct net_bridge_mdb_entry *mdb) 1028 { 1029 return false; 1030 } 1031 1032 static inline void br_mdb_init(void) 1033 { 1034 } 1035 1036 static inline void br_mdb_uninit(void) 1037 { 1038 } 1039 1040 static inline int br_mdb_hash_init(struct net_bridge *br) 1041 { 1042 return 0; 1043 } 1044 1045 static inline void br_mdb_hash_fini(struct net_bridge *br) 1046 { 1047 } 1048 1049 static inline void br_multicast_count(struct net_bridge *br, 1050 const struct net_bridge_port *p, 1051 const struct sk_buff *skb, 1052 u8 type, u8 dir) 1053 { 1054 } 1055 1056 static inline int br_multicast_init_stats(struct net_bridge *br) 1057 { 1058 return 0; 1059 } 1060 1061 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1062 { 1063 } 1064 1065 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1066 { 1067 return 0; 1068 } 1069 #endif 1070 1071 /* br_vlan.c */ 1072 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1073 bool br_allowed_ingress(const struct net_bridge *br, 1074 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1075 u16 *vid, u8 *state); 1076 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1077 const struct sk_buff *skb); 1078 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1079 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1080 const struct net_bridge_port *port, 1081 struct net_bridge_vlan_group *vg, 1082 struct sk_buff *skb); 1083 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1084 bool *changed, struct netlink_ext_ack *extack); 1085 int br_vlan_delete(struct net_bridge *br, u16 vid); 1086 void br_vlan_flush(struct net_bridge *br); 1087 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1088 void br_recalculate_fwd_mask(struct net_bridge *br); 1089 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1090 struct netlink_ext_ack *extack); 1091 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1092 struct netlink_ext_ack *extack); 1093 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1094 struct netlink_ext_ack *extack); 1095 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1096 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1097 int br_vlan_init(struct net_bridge *br); 1098 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1099 struct netlink_ext_ack *extack); 1100 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1101 struct netlink_ext_ack *extack); 1102 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1103 bool *changed, struct netlink_ext_ack *extack); 1104 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1105 void nbp_vlan_flush(struct net_bridge_port *port); 1106 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1107 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1108 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1109 struct pcpu_sw_netstats *stats); 1110 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1111 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1112 void *ptr); 1113 void br_vlan_rtnl_init(void); 1114 void br_vlan_rtnl_uninit(void); 1115 void br_vlan_notify(const struct net_bridge *br, 1116 const struct net_bridge_port *p, 1117 u16 vid, u16 vid_range, 1118 int cmd); 1119 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1120 const struct net_bridge_vlan *range_end); 1121 1122 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1123 struct net_device_path_ctx *ctx, 1124 struct net_device_path *path); 1125 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1126 struct net_bridge_port *dst, 1127 struct net_device_path *path); 1128 1129 static inline struct net_bridge_vlan_group *br_vlan_group( 1130 const struct net_bridge *br) 1131 { 1132 return rtnl_dereference(br->vlgrp); 1133 } 1134 1135 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1136 const struct net_bridge_port *p) 1137 { 1138 return rtnl_dereference(p->vlgrp); 1139 } 1140 1141 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1142 const struct net_bridge *br) 1143 { 1144 return rcu_dereference(br->vlgrp); 1145 } 1146 1147 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1148 const struct net_bridge_port *p) 1149 { 1150 return rcu_dereference(p->vlgrp); 1151 } 1152 1153 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1154 * skb, the vlan tag will always be present if the frame was tagged. 1155 */ 1156 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1157 { 1158 int err = 0; 1159 1160 if (skb_vlan_tag_present(skb)) { 1161 *vid = skb_vlan_tag_get_id(skb); 1162 } else { 1163 *vid = 0; 1164 err = -EINVAL; 1165 } 1166 1167 return err; 1168 } 1169 1170 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1171 { 1172 if (!vg) 1173 return 0; 1174 1175 smp_rmb(); 1176 return vg->pvid; 1177 } 1178 1179 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1180 { 1181 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1182 } 1183 #else 1184 static inline bool br_allowed_ingress(const struct net_bridge *br, 1185 struct net_bridge_vlan_group *vg, 1186 struct sk_buff *skb, 1187 u16 *vid, u8 *state) 1188 { 1189 return true; 1190 } 1191 1192 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1193 const struct sk_buff *skb) 1194 { 1195 return true; 1196 } 1197 1198 static inline bool br_should_learn(struct net_bridge_port *p, 1199 struct sk_buff *skb, u16 *vid) 1200 { 1201 return true; 1202 } 1203 1204 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1205 const struct net_bridge_port *port, 1206 struct net_bridge_vlan_group *vg, 1207 struct sk_buff *skb) 1208 { 1209 return skb; 1210 } 1211 1212 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1213 bool *changed, struct netlink_ext_ack *extack) 1214 { 1215 *changed = false; 1216 return -EOPNOTSUPP; 1217 } 1218 1219 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1220 { 1221 return -EOPNOTSUPP; 1222 } 1223 1224 static inline void br_vlan_flush(struct net_bridge *br) 1225 { 1226 } 1227 1228 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1229 { 1230 } 1231 1232 static inline int br_vlan_init(struct net_bridge *br) 1233 { 1234 return 0; 1235 } 1236 1237 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1238 bool *changed, struct netlink_ext_ack *extack) 1239 { 1240 *changed = false; 1241 return -EOPNOTSUPP; 1242 } 1243 1244 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1245 { 1246 return -EOPNOTSUPP; 1247 } 1248 1249 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1250 { 1251 } 1252 1253 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1254 u16 vid) 1255 { 1256 return NULL; 1257 } 1258 1259 static inline int nbp_vlan_init(struct net_bridge_port *port, 1260 struct netlink_ext_ack *extack) 1261 { 1262 return 0; 1263 } 1264 1265 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1266 { 1267 return 0; 1268 } 1269 1270 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1271 { 1272 return 0; 1273 } 1274 1275 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1276 unsigned long val, 1277 struct netlink_ext_ack *extack) 1278 { 1279 return -EOPNOTSUPP; 1280 } 1281 1282 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1283 u32 filter_mask) 1284 { 1285 return 0; 1286 } 1287 1288 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1289 struct net_device_path_ctx *ctx, 1290 struct net_device_path *path) 1291 { 1292 } 1293 1294 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1295 struct net_bridge_port *dst, 1296 struct net_device_path *path) 1297 { 1298 return 0; 1299 } 1300 1301 static inline struct net_bridge_vlan_group *br_vlan_group( 1302 const struct net_bridge *br) 1303 { 1304 return NULL; 1305 } 1306 1307 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1308 const struct net_bridge_port *p) 1309 { 1310 return NULL; 1311 } 1312 1313 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1314 const struct net_bridge *br) 1315 { 1316 return NULL; 1317 } 1318 1319 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1320 const struct net_bridge_port *p) 1321 { 1322 return NULL; 1323 } 1324 1325 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1326 struct pcpu_sw_netstats *stats) 1327 { 1328 } 1329 1330 static inline void br_vlan_port_event(struct net_bridge_port *p, 1331 unsigned long event) 1332 { 1333 } 1334 1335 static inline int br_vlan_bridge_event(struct net_device *dev, 1336 unsigned long event, void *ptr) 1337 { 1338 return 0; 1339 } 1340 1341 static inline void br_vlan_rtnl_init(void) 1342 { 1343 } 1344 1345 static inline void br_vlan_rtnl_uninit(void) 1346 { 1347 } 1348 1349 static inline void br_vlan_notify(const struct net_bridge *br, 1350 const struct net_bridge_port *p, 1351 u16 vid, u16 vid_range, 1352 int cmd) 1353 { 1354 } 1355 1356 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1357 const struct net_bridge_vlan *range_end) 1358 { 1359 return true; 1360 } 1361 #endif 1362 1363 /* br_vlan_options.c */ 1364 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1365 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1366 const struct net_bridge_vlan *range_end); 1367 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1368 size_t br_vlan_opts_nl_size(void); 1369 int br_vlan_process_options(const struct net_bridge *br, 1370 const struct net_bridge_port *p, 1371 struct net_bridge_vlan *range_start, 1372 struct net_bridge_vlan *range_end, 1373 struct nlattr **tb, 1374 struct netlink_ext_ack *extack); 1375 1376 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1377 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1378 { 1379 return READ_ONCE(v->state); 1380 } 1381 1382 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1383 { 1384 WRITE_ONCE(v->state, state); 1385 } 1386 1387 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1388 { 1389 return READ_ONCE(vg->pvid_state); 1390 } 1391 1392 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1393 u8 state) 1394 { 1395 WRITE_ONCE(vg->pvid_state, state); 1396 } 1397 1398 /* learn_allow is true at ingress and false at egress */ 1399 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1400 { 1401 switch (state) { 1402 case BR_STATE_LEARNING: 1403 return learn_allow; 1404 case BR_STATE_FORWARDING: 1405 return true; 1406 default: 1407 return false; 1408 } 1409 } 1410 #endif 1411 1412 struct nf_br_ops { 1413 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1414 }; 1415 extern const struct nf_br_ops __rcu *nf_br_ops; 1416 1417 /* br_netfilter.c */ 1418 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1419 int br_nf_core_init(void); 1420 void br_nf_core_fini(void); 1421 void br_netfilter_rtable_init(struct net_bridge *); 1422 #else 1423 static inline int br_nf_core_init(void) { return 0; } 1424 static inline void br_nf_core_fini(void) {} 1425 #define br_netfilter_rtable_init(x) 1426 #endif 1427 1428 /* br_stp.c */ 1429 void br_set_state(struct net_bridge_port *p, unsigned int state); 1430 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1431 void br_init_port(struct net_bridge_port *p); 1432 void br_become_designated_port(struct net_bridge_port *p); 1433 1434 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1435 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1436 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1437 int br_set_max_age(struct net_bridge *br, unsigned long x); 1438 int __set_ageing_time(struct net_device *dev, unsigned long t); 1439 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1440 1441 1442 /* br_stp_if.c */ 1443 void br_stp_enable_bridge(struct net_bridge *br); 1444 void br_stp_disable_bridge(struct net_bridge *br); 1445 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1446 struct netlink_ext_ack *extack); 1447 void br_stp_enable_port(struct net_bridge_port *p); 1448 void br_stp_disable_port(struct net_bridge_port *p); 1449 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1450 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1451 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1452 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1453 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1454 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1455 1456 /* br_stp_bpdu.c */ 1457 struct stp_proto; 1458 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1459 struct net_device *dev); 1460 1461 /* br_stp_timer.c */ 1462 void br_stp_timer_init(struct net_bridge *br); 1463 void br_stp_port_timer_init(struct net_bridge_port *p); 1464 unsigned long br_timer_value(const struct timer_list *timer); 1465 1466 /* br.c */ 1467 #if IS_ENABLED(CONFIG_ATM_LANE) 1468 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1469 #endif 1470 1471 /* br_mrp.c */ 1472 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1473 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1474 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1475 bool br_mrp_enabled(struct net_bridge *br); 1476 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1477 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1478 #else 1479 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1480 struct nlattr *attr, int cmd, 1481 struct netlink_ext_ack *extack) 1482 { 1483 return -EOPNOTSUPP; 1484 } 1485 1486 static inline bool br_mrp_enabled(struct net_bridge *br) 1487 { 1488 return false; 1489 } 1490 1491 static inline void br_mrp_port_del(struct net_bridge *br, 1492 struct net_bridge_port *p) 1493 { 1494 } 1495 1496 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1497 { 1498 return 0; 1499 } 1500 1501 #endif 1502 1503 /* br_cfm.c */ 1504 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1505 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1506 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1507 bool br_cfm_created(struct net_bridge *br); 1508 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1509 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1510 int br_cfm_status_fill_info(struct sk_buff *skb, 1511 struct net_bridge *br, 1512 bool getlink); 1513 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1514 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1515 #else 1516 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1517 struct nlattr *attr, int cmd, 1518 struct netlink_ext_ack *extack) 1519 { 1520 return -EOPNOTSUPP; 1521 } 1522 1523 static inline bool br_cfm_created(struct net_bridge *br) 1524 { 1525 return false; 1526 } 1527 1528 static inline void br_cfm_port_del(struct net_bridge *br, 1529 struct net_bridge_port *p) 1530 { 1531 } 1532 1533 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1534 { 1535 return -EOPNOTSUPP; 1536 } 1537 1538 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1539 struct net_bridge *br, 1540 bool getlink) 1541 { 1542 return -EOPNOTSUPP; 1543 } 1544 1545 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1546 { 1547 return -EOPNOTSUPP; 1548 } 1549 1550 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1551 { 1552 return -EOPNOTSUPP; 1553 } 1554 #endif 1555 1556 /* br_netlink.c */ 1557 extern struct rtnl_link_ops br_link_ops; 1558 int br_netlink_init(void); 1559 void br_netlink_fini(void); 1560 void br_ifinfo_notify(int event, const struct net_bridge *br, 1561 const struct net_bridge_port *port); 1562 void br_info_notify(int event, const struct net_bridge *br, 1563 const struct net_bridge_port *port, u32 filter); 1564 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1565 struct netlink_ext_ack *extack); 1566 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1567 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1568 u32 filter_mask, int nlflags); 1569 int br_process_vlan_info(struct net_bridge *br, 1570 struct net_bridge_port *p, int cmd, 1571 struct bridge_vlan_info *vinfo_curr, 1572 struct bridge_vlan_info **vinfo_last, 1573 bool *changed, 1574 struct netlink_ext_ack *extack); 1575 1576 #ifdef CONFIG_SYSFS 1577 /* br_sysfs_if.c */ 1578 extern const struct sysfs_ops brport_sysfs_ops; 1579 int br_sysfs_addif(struct net_bridge_port *p); 1580 int br_sysfs_renameif(struct net_bridge_port *p); 1581 1582 /* br_sysfs_br.c */ 1583 int br_sysfs_addbr(struct net_device *dev); 1584 void br_sysfs_delbr(struct net_device *dev); 1585 1586 #else 1587 1588 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1589 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1590 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1591 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1592 #endif /* CONFIG_SYSFS */ 1593 1594 /* br_switchdev.c */ 1595 #ifdef CONFIG_NET_SWITCHDEV 1596 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1597 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1598 struct sk_buff *skb); 1599 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1600 const struct sk_buff *skb); 1601 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1602 unsigned long flags, 1603 unsigned long mask, 1604 struct netlink_ext_ack *extack); 1605 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1606 int type); 1607 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1608 struct netlink_ext_ack *extack); 1609 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1610 1611 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1612 { 1613 skb->offload_fwd_mark = 0; 1614 } 1615 #else 1616 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1617 { 1618 return 0; 1619 } 1620 1621 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1622 struct sk_buff *skb) 1623 { 1624 } 1625 1626 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1627 const struct sk_buff *skb) 1628 { 1629 return true; 1630 } 1631 1632 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1633 unsigned long flags, 1634 unsigned long mask, 1635 struct netlink_ext_ack *extack) 1636 { 1637 return 0; 1638 } 1639 1640 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1641 u16 vid, u16 flags, 1642 struct netlink_ext_ack *extack) 1643 { 1644 return -EOPNOTSUPP; 1645 } 1646 1647 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1648 { 1649 return -EOPNOTSUPP; 1650 } 1651 1652 static inline void 1653 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1654 { 1655 } 1656 1657 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1658 { 1659 } 1660 #endif /* CONFIG_NET_SWITCHDEV */ 1661 1662 /* br_arp_nd_proxy.c */ 1663 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1664 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1665 u16 vid, struct net_bridge_port *p); 1666 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1667 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1668 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1669 #endif 1670