1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_VERSION "2.3" 33 34 /* Control of forwarding link local multicast */ 35 #define BR_GROUPFWD_DEFAULT 0 36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 37 enum { 38 BR_GROUPFWD_STP = BIT(0), 39 BR_GROUPFWD_MACPAUSE = BIT(1), 40 BR_GROUPFWD_LACP = BIT(2), 41 }; 42 43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 44 BR_GROUPFWD_LACP) 45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 46 #define BR_GROUPFWD_8021AD 0xB801u 47 48 /* Path to usermode spanning tree program */ 49 #define BR_STP_PROG "/sbin/bridge-stp" 50 51 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 52 53 typedef struct bridge_id bridge_id; 54 typedef struct mac_addr mac_addr; 55 typedef __u16 port_id; 56 57 struct bridge_id { 58 unsigned char prio[2]; 59 unsigned char addr[ETH_ALEN]; 60 }; 61 62 struct mac_addr { 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 67 /* our own querier */ 68 struct bridge_mcast_own_query { 69 struct timer_list timer; 70 u32 startup_sent; 71 }; 72 73 /* other querier */ 74 struct bridge_mcast_other_query { 75 struct timer_list timer; 76 unsigned long delay_time; 77 }; 78 79 /* selected querier */ 80 struct bridge_mcast_querier { 81 struct br_ip addr; 82 struct net_bridge_port __rcu *port; 83 }; 84 85 /* IGMP/MLD statistics */ 86 struct bridge_mcast_stats { 87 struct br_mcast_stats mstats; 88 struct u64_stats_sync syncp; 89 }; 90 #endif 91 92 struct br_tunnel_info { 93 __be64 tunnel_id; 94 struct metadata_dst *tunnel_dst; 95 }; 96 97 /* private vlan flags */ 98 enum { 99 BR_VLFLAG_PER_PORT_STATS = BIT(0), 100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 101 }; 102 103 /** 104 * struct net_bridge_vlan - per-vlan entry 105 * 106 * @vnode: rhashtable member 107 * @vid: VLAN id 108 * @flags: bridge vlan flags 109 * @priv_flags: private (in-kernel) bridge vlan flags 110 * @state: STP state (e.g. blocking, learning, forwarding) 111 * @stats: per-cpu VLAN statistics 112 * @br: if MASTER flag set, this points to a bridge struct 113 * @port: if MASTER flag unset, this points to a port struct 114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 116 * for this VLAN entry 117 * @vlist: sorted list of VLAN entries 118 * @rcu: used for entry destruction 119 * 120 * This structure is shared between the global per-VLAN entries contained in 121 * the bridge rhashtable and the local per-port per-VLAN entries contained in 122 * the port's rhashtable. The union entries should be interpreted depending on 123 * the entry flags that are set. 124 */ 125 struct net_bridge_vlan { 126 struct rhash_head vnode; 127 struct rhash_head tnode; 128 u16 vid; 129 u16 flags; 130 u16 priv_flags; 131 u8 state; 132 struct pcpu_sw_netstats __percpu *stats; 133 union { 134 struct net_bridge *br; 135 struct net_bridge_port *port; 136 }; 137 union { 138 refcount_t refcnt; 139 struct net_bridge_vlan *brvlan; 140 }; 141 142 struct br_tunnel_info tinfo; 143 144 struct list_head vlist; 145 146 struct rcu_head rcu; 147 }; 148 149 /** 150 * struct net_bridge_vlan_group 151 * 152 * @vlan_hash: VLAN entry rhashtable 153 * @vlan_list: sorted VLAN entry list 154 * @num_vlans: number of total VLAN entries 155 * @pvid: PVID VLAN id 156 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 157 * 158 * IMPORTANT: Be careful when checking if there're VLAN entries using list 159 * primitives because the bridge can have entries in its list which 160 * are just for global context but not for filtering, i.e. they have 161 * the master flag set but not the brentry flag. If you have to check 162 * if there're "real" entries in the bridge please test @num_vlans 163 */ 164 struct net_bridge_vlan_group { 165 struct rhashtable vlan_hash; 166 struct rhashtable tunnel_hash; 167 struct list_head vlan_list; 168 u16 num_vlans; 169 u16 pvid; 170 u8 pvid_state; 171 }; 172 173 /* bridge fdb flags */ 174 enum { 175 BR_FDB_LOCAL, 176 BR_FDB_STATIC, 177 BR_FDB_STICKY, 178 BR_FDB_ADDED_BY_USER, 179 BR_FDB_ADDED_BY_EXT_LEARN, 180 BR_FDB_OFFLOADED, 181 BR_FDB_NOTIFY, 182 BR_FDB_NOTIFY_INACTIVE 183 }; 184 185 struct net_bridge_fdb_key { 186 mac_addr addr; 187 u16 vlan_id; 188 }; 189 190 struct net_bridge_fdb_entry { 191 struct rhash_head rhnode; 192 struct net_bridge_port *dst; 193 194 struct net_bridge_fdb_key key; 195 struct hlist_node fdb_node; 196 unsigned long flags; 197 198 /* write-heavy members should not affect lookups */ 199 unsigned long updated ____cacheline_aligned_in_smp; 200 unsigned long used; 201 202 struct rcu_head rcu; 203 }; 204 205 #define MDB_PG_FLAGS_PERMANENT BIT(0) 206 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 208 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 209 #define MDB_PG_FLAGS_BLOCKED BIT(4) 210 211 #define PG_SRC_ENT_LIMIT 32 212 213 #define BR_SGRP_F_DELETE BIT(0) 214 #define BR_SGRP_F_SEND BIT(1) 215 #define BR_SGRP_F_INSTALLED BIT(2) 216 217 struct net_bridge_mcast_gc { 218 struct hlist_node gc_node; 219 void (*destroy)(struct net_bridge_mcast_gc *gc); 220 }; 221 222 struct net_bridge_group_src { 223 struct hlist_node node; 224 225 struct br_ip addr; 226 struct net_bridge_port_group *pg; 227 u8 flags; 228 u8 src_query_rexmit_cnt; 229 struct timer_list timer; 230 231 struct net_bridge *br; 232 struct net_bridge_mcast_gc mcast_gc; 233 struct rcu_head rcu; 234 }; 235 236 struct net_bridge_port_group_sg_key { 237 struct net_bridge_port *port; 238 struct br_ip addr; 239 }; 240 241 struct net_bridge_port_group { 242 struct net_bridge_port_group __rcu *next; 243 struct net_bridge_port_group_sg_key key; 244 unsigned char eth_addr[ETH_ALEN] __aligned(2); 245 unsigned char flags; 246 unsigned char filter_mode; 247 unsigned char grp_query_rexmit_cnt; 248 unsigned char rt_protocol; 249 250 struct hlist_head src_list; 251 unsigned int src_ents; 252 struct timer_list timer; 253 struct timer_list rexmit_timer; 254 struct hlist_node mglist; 255 struct rb_root eht_set_tree; 256 struct rb_root eht_host_tree; 257 258 struct rhash_head rhnode; 259 struct net_bridge_mcast_gc mcast_gc; 260 struct rcu_head rcu; 261 }; 262 263 struct net_bridge_mdb_entry { 264 struct rhash_head rhnode; 265 struct net_bridge *br; 266 struct net_bridge_port_group __rcu *ports; 267 struct br_ip addr; 268 bool host_joined; 269 270 struct timer_list timer; 271 struct hlist_node mdb_node; 272 273 struct net_bridge_mcast_gc mcast_gc; 274 struct rcu_head rcu; 275 }; 276 277 struct net_bridge_port { 278 struct net_bridge *br; 279 struct net_device *dev; 280 struct list_head list; 281 282 unsigned long flags; 283 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 284 struct net_bridge_vlan_group __rcu *vlgrp; 285 #endif 286 struct net_bridge_port __rcu *backup_port; 287 288 /* STP */ 289 u8 priority; 290 u8 state; 291 u16 port_no; 292 unsigned char topology_change_ack; 293 unsigned char config_pending; 294 port_id port_id; 295 port_id designated_port; 296 bridge_id designated_root; 297 bridge_id designated_bridge; 298 u32 path_cost; 299 u32 designated_cost; 300 unsigned long designated_age; 301 302 struct timer_list forward_delay_timer; 303 struct timer_list hold_timer; 304 struct timer_list message_age_timer; 305 struct kobject kobj; 306 struct rcu_head rcu; 307 308 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 309 struct bridge_mcast_own_query ip4_own_query; 310 struct timer_list ip4_mc_router_timer; 311 struct hlist_node ip4_rlist; 312 #if IS_ENABLED(CONFIG_IPV6) 313 struct bridge_mcast_own_query ip6_own_query; 314 struct timer_list ip6_mc_router_timer; 315 struct hlist_node ip6_rlist; 316 #endif /* IS_ENABLED(CONFIG_IPV6) */ 317 u32 multicast_eht_hosts_limit; 318 u32 multicast_eht_hosts_cnt; 319 unsigned char multicast_router; 320 struct bridge_mcast_stats __percpu *mcast_stats; 321 struct hlist_head mglist; 322 #endif 323 324 #ifdef CONFIG_SYSFS 325 char sysfs_name[IFNAMSIZ]; 326 #endif 327 328 #ifdef CONFIG_NET_POLL_CONTROLLER 329 struct netpoll *np; 330 #endif 331 #ifdef CONFIG_NET_SWITCHDEV 332 int offload_fwd_mark; 333 #endif 334 u16 group_fwd_mask; 335 u16 backup_redirected_cnt; 336 337 struct bridge_stp_xstats stp_xstats; 338 }; 339 340 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 341 342 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 343 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 344 345 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 346 { 347 return rcu_dereference(dev->rx_handler_data); 348 } 349 350 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 351 { 352 return netif_is_bridge_port(dev) ? 353 rtnl_dereference(dev->rx_handler_data) : NULL; 354 } 355 356 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 357 { 358 return netif_is_bridge_port(dev) ? 359 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 360 } 361 362 enum net_bridge_opts { 363 BROPT_VLAN_ENABLED, 364 BROPT_VLAN_STATS_ENABLED, 365 BROPT_NF_CALL_IPTABLES, 366 BROPT_NF_CALL_IP6TABLES, 367 BROPT_NF_CALL_ARPTABLES, 368 BROPT_GROUP_ADDR_SET, 369 BROPT_MULTICAST_ENABLED, 370 BROPT_MULTICAST_QUERIER, 371 BROPT_MULTICAST_QUERY_USE_IFADDR, 372 BROPT_MULTICAST_STATS_ENABLED, 373 BROPT_HAS_IPV6_ADDR, 374 BROPT_NEIGH_SUPPRESS_ENABLED, 375 BROPT_MTU_SET_BY_USER, 376 BROPT_VLAN_STATS_PER_PORT, 377 BROPT_NO_LL_LEARN, 378 BROPT_VLAN_BRIDGE_BINDING, 379 }; 380 381 struct net_bridge { 382 spinlock_t lock; 383 spinlock_t hash_lock; 384 struct hlist_head frame_type_list; 385 struct net_device *dev; 386 unsigned long options; 387 /* These fields are accessed on each packet */ 388 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 389 __be16 vlan_proto; 390 u16 default_pvid; 391 struct net_bridge_vlan_group __rcu *vlgrp; 392 #endif 393 394 struct rhashtable fdb_hash_tbl; 395 struct list_head port_list; 396 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 397 union { 398 struct rtable fake_rtable; 399 struct rt6_info fake_rt6_info; 400 }; 401 #endif 402 u16 group_fwd_mask; 403 u16 group_fwd_mask_required; 404 405 /* STP */ 406 bridge_id designated_root; 407 bridge_id bridge_id; 408 unsigned char topology_change; 409 unsigned char topology_change_detected; 410 u16 root_port; 411 unsigned long max_age; 412 unsigned long hello_time; 413 unsigned long forward_delay; 414 unsigned long ageing_time; 415 unsigned long bridge_max_age; 416 unsigned long bridge_hello_time; 417 unsigned long bridge_forward_delay; 418 unsigned long bridge_ageing_time; 419 u32 root_path_cost; 420 421 u8 group_addr[ETH_ALEN]; 422 423 enum { 424 BR_NO_STP, /* no spanning tree */ 425 BR_KERNEL_STP, /* old STP in kernel */ 426 BR_USER_STP, /* new RSTP in userspace */ 427 } stp_enabled; 428 429 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 430 431 u32 hash_max; 432 433 u32 multicast_last_member_count; 434 u32 multicast_startup_query_count; 435 436 u8 multicast_igmp_version; 437 u8 multicast_router; 438 #if IS_ENABLED(CONFIG_IPV6) 439 u8 multicast_mld_version; 440 #endif 441 spinlock_t multicast_lock; 442 unsigned long multicast_last_member_interval; 443 unsigned long multicast_membership_interval; 444 unsigned long multicast_querier_interval; 445 unsigned long multicast_query_interval; 446 unsigned long multicast_query_response_interval; 447 unsigned long multicast_startup_query_interval; 448 449 struct rhashtable mdb_hash_tbl; 450 struct rhashtable sg_port_tbl; 451 452 struct hlist_head mcast_gc_list; 453 struct hlist_head mdb_list; 454 455 struct hlist_head ip4_mc_router_list; 456 struct timer_list ip4_mc_router_timer; 457 struct bridge_mcast_other_query ip4_other_query; 458 struct bridge_mcast_own_query ip4_own_query; 459 struct bridge_mcast_querier ip4_querier; 460 struct bridge_mcast_stats __percpu *mcast_stats; 461 #if IS_ENABLED(CONFIG_IPV6) 462 struct hlist_head ip6_mc_router_list; 463 struct timer_list ip6_mc_router_timer; 464 struct bridge_mcast_other_query ip6_other_query; 465 struct bridge_mcast_own_query ip6_own_query; 466 struct bridge_mcast_querier ip6_querier; 467 #endif /* IS_ENABLED(CONFIG_IPV6) */ 468 struct work_struct mcast_gc_work; 469 #endif 470 471 struct timer_list hello_timer; 472 struct timer_list tcn_timer; 473 struct timer_list topology_change_timer; 474 struct delayed_work gc_work; 475 struct kobject *ifobj; 476 u32 auto_cnt; 477 478 #ifdef CONFIG_NET_SWITCHDEV 479 int offload_fwd_mark; 480 #endif 481 struct hlist_head fdb_list; 482 483 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 484 struct hlist_head mrp_list; 485 #endif 486 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 487 struct hlist_head mep_list; 488 #endif 489 }; 490 491 struct br_input_skb_cb { 492 struct net_device *brdev; 493 494 u16 frag_max_size; 495 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 496 u8 igmp; 497 u8 mrouters_only:1; 498 #endif 499 u8 proxyarp_replied:1; 500 u8 src_port_isolated:1; 501 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 502 u8 vlan_filtered:1; 503 #endif 504 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 505 u8 br_netfilter_broute:1; 506 #endif 507 508 #ifdef CONFIG_NET_SWITCHDEV 509 int offload_fwd_mark; 510 #endif 511 }; 512 513 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 514 515 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 516 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 517 #else 518 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 519 #endif 520 521 #define br_printk(level, br, format, args...) \ 522 printk(level "%s: " format, (br)->dev->name, ##args) 523 524 #define br_err(__br, format, args...) \ 525 br_printk(KERN_ERR, __br, format, ##args) 526 #define br_warn(__br, format, args...) \ 527 br_printk(KERN_WARNING, __br, format, ##args) 528 #define br_notice(__br, format, args...) \ 529 br_printk(KERN_NOTICE, __br, format, ##args) 530 #define br_info(__br, format, args...) \ 531 br_printk(KERN_INFO, __br, format, ##args) 532 533 #define br_debug(br, format, args...) \ 534 pr_debug("%s: " format, (br)->dev->name, ##args) 535 536 /* called under bridge lock */ 537 static inline int br_is_root_bridge(const struct net_bridge *br) 538 { 539 return !memcmp(&br->bridge_id, &br->designated_root, 8); 540 } 541 542 /* check if a VLAN entry is global */ 543 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 544 { 545 return v->flags & BRIDGE_VLAN_INFO_MASTER; 546 } 547 548 /* check if a VLAN entry is used by the bridge */ 549 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 550 { 551 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 552 } 553 554 /* check if we should use the vlan entry, returns false if it's only context */ 555 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 556 { 557 if (br_vlan_is_master(v)) { 558 if (br_vlan_is_brentry(v)) 559 return true; 560 else 561 return false; 562 } 563 564 return true; 565 } 566 567 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 568 { 569 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 570 } 571 572 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 573 { 574 bool ret = vid > 0 && vid < VLAN_VID_MASK; 575 576 if (!ret) 577 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 578 579 return ret; 580 } 581 582 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 583 const struct bridge_vlan_info *last, 584 struct netlink_ext_ack *extack) 585 { 586 /* pvid flag is not allowed in ranges */ 587 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 588 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 589 return false; 590 } 591 592 /* when cur is the range end, check if: 593 * - it has range start flag 594 * - range ids are invalid (end is equal to or before start) 595 */ 596 if (last) { 597 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 598 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 599 return false; 600 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 601 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 602 return false; 603 } else if (cur->vid <= last->vid) { 604 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 605 return false; 606 } 607 } 608 609 /* check for required range flags */ 610 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 611 BRIDGE_VLAN_INFO_RANGE_END))) { 612 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 613 return false; 614 } 615 616 return true; 617 } 618 619 static inline int br_afspec_cmd_to_rtm(int cmd) 620 { 621 switch (cmd) { 622 case RTM_SETLINK: 623 return RTM_NEWVLAN; 624 case RTM_DELLINK: 625 return RTM_DELVLAN; 626 } 627 628 return 0; 629 } 630 631 static inline int br_opt_get(const struct net_bridge *br, 632 enum net_bridge_opts opt) 633 { 634 return test_bit(opt, &br->options); 635 } 636 637 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 638 struct netlink_ext_ack *extack); 639 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 640 int br_boolopt_multi_toggle(struct net_bridge *br, 641 struct br_boolopt_multi *bm, 642 struct netlink_ext_ack *extack); 643 void br_boolopt_multi_get(const struct net_bridge *br, 644 struct br_boolopt_multi *bm); 645 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 646 647 /* br_device.c */ 648 void br_dev_setup(struct net_device *dev); 649 void br_dev_delete(struct net_device *dev, struct list_head *list); 650 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 651 #ifdef CONFIG_NET_POLL_CONTROLLER 652 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 653 struct sk_buff *skb) 654 { 655 netpoll_send_skb(p->np, skb); 656 } 657 658 int br_netpoll_enable(struct net_bridge_port *p); 659 void br_netpoll_disable(struct net_bridge_port *p); 660 #else 661 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 662 struct sk_buff *skb) 663 { 664 } 665 666 static inline int br_netpoll_enable(struct net_bridge_port *p) 667 { 668 return 0; 669 } 670 671 static inline void br_netpoll_disable(struct net_bridge_port *p) 672 { 673 } 674 #endif 675 676 /* br_fdb.c */ 677 int br_fdb_init(void); 678 void br_fdb_fini(void); 679 int br_fdb_hash_init(struct net_bridge *br); 680 void br_fdb_hash_fini(struct net_bridge *br); 681 void br_fdb_flush(struct net_bridge *br); 682 void br_fdb_find_delete_local(struct net_bridge *br, 683 const struct net_bridge_port *p, 684 const unsigned char *addr, u16 vid); 685 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 686 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 687 void br_fdb_cleanup(struct work_struct *work); 688 void br_fdb_delete_by_port(struct net_bridge *br, 689 const struct net_bridge_port *p, u16 vid, int do_all); 690 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 691 const unsigned char *addr, 692 __u16 vid); 693 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 694 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 695 unsigned long off); 696 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 697 const unsigned char *addr, u16 vid); 698 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 699 const unsigned char *addr, u16 vid, unsigned long flags); 700 701 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 702 struct net_device *dev, const unsigned char *addr, u16 vid); 703 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 704 const unsigned char *addr, u16 vid, u16 nlh_flags, 705 struct netlink_ext_ack *extack); 706 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 707 struct net_device *dev, struct net_device *fdev, int *idx); 708 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 709 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 710 struct netlink_ext_ack *extack); 711 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 712 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 713 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 714 const unsigned char *addr, u16 vid, 715 bool swdev_notify); 716 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 717 const unsigned char *addr, u16 vid, 718 bool swdev_notify); 719 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 720 const unsigned char *addr, u16 vid, bool offloaded); 721 722 /* br_forward.c */ 723 enum br_pkt_type { 724 BR_PKT_UNICAST, 725 BR_PKT_MULTICAST, 726 BR_PKT_BROADCAST 727 }; 728 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 729 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 730 bool local_rcv, bool local_orig); 731 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 732 void br_flood(struct net_bridge *br, struct sk_buff *skb, 733 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 734 735 /* return true if both source port and dest port are isolated */ 736 static inline bool br_skb_isolated(const struct net_bridge_port *to, 737 const struct sk_buff *skb) 738 { 739 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 740 (to->flags & BR_ISOLATED); 741 } 742 743 /* br_if.c */ 744 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 745 int br_add_bridge(struct net *net, const char *name); 746 int br_del_bridge(struct net *net, const char *name); 747 int br_add_if(struct net_bridge *br, struct net_device *dev, 748 struct netlink_ext_ack *extack); 749 int br_del_if(struct net_bridge *br, struct net_device *dev); 750 void br_mtu_auto_adjust(struct net_bridge *br); 751 netdev_features_t br_features_recompute(struct net_bridge *br, 752 netdev_features_t features); 753 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 754 void br_manage_promisc(struct net_bridge *br); 755 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 756 757 /* br_input.c */ 758 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 759 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 760 761 struct br_frame_type { 762 __be16 type; 763 int (*frame_handler)(struct net_bridge_port *port, 764 struct sk_buff *skb); 765 struct hlist_node list; 766 }; 767 768 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 769 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 770 771 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 772 { 773 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 774 } 775 776 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 777 { 778 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 779 } 780 781 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 782 { 783 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 784 } 785 786 static inline struct net_bridge_port * 787 br_port_get_check_rtnl(const struct net_device *dev) 788 { 789 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 790 } 791 792 /* br_ioctl.c */ 793 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 794 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 795 void __user *arg); 796 797 /* br_multicast.c */ 798 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 799 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 800 struct sk_buff *skb, u16 vid); 801 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 802 struct sk_buff *skb, u16 vid); 803 int br_multicast_add_port(struct net_bridge_port *port); 804 void br_multicast_del_port(struct net_bridge_port *port); 805 void br_multicast_enable_port(struct net_bridge_port *port); 806 void br_multicast_disable_port(struct net_bridge_port *port); 807 void br_multicast_init(struct net_bridge *br); 808 void br_multicast_join_snoopers(struct net_bridge *br); 809 void br_multicast_leave_snoopers(struct net_bridge *br); 810 void br_multicast_open(struct net_bridge *br); 811 void br_multicast_stop(struct net_bridge *br); 812 void br_multicast_dev_del(struct net_bridge *br); 813 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 814 struct sk_buff *skb, bool local_rcv, bool local_orig); 815 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 816 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 817 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 818 struct netlink_ext_ack *extack); 819 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 820 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 821 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 822 #if IS_ENABLED(CONFIG_IPV6) 823 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 824 #endif 825 struct net_bridge_mdb_entry * 826 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 827 struct net_bridge_mdb_entry * 828 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 829 struct net_bridge_port_group * 830 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 831 struct net_bridge_port_group __rcu *next, 832 unsigned char flags, const unsigned char *src, 833 u8 filter_mode, u8 rt_protocol); 834 int br_mdb_hash_init(struct net_bridge *br); 835 void br_mdb_hash_fini(struct net_bridge *br); 836 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 837 struct net_bridge_port_group *pg, int type); 838 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 839 int type); 840 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 841 struct net_bridge_port_group *pg, 842 struct net_bridge_port_group __rcu **pp); 843 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 844 const struct sk_buff *skb, u8 type, u8 dir); 845 int br_multicast_init_stats(struct net_bridge *br); 846 void br_multicast_uninit_stats(struct net_bridge *br); 847 void br_multicast_get_stats(const struct net_bridge *br, 848 const struct net_bridge_port *p, 849 struct br_mcast_stats *dest); 850 void br_mdb_init(void); 851 void br_mdb_uninit(void); 852 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 853 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 854 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 855 u8 filter_mode); 856 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 857 struct net_bridge_port_group *sg); 858 struct net_bridge_group_src * 859 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 860 void br_multicast_del_group_src(struct net_bridge_group_src *src, 861 bool fastleave); 862 863 static inline bool br_group_is_l2(const struct br_ip *group) 864 { 865 return group->proto == 0; 866 } 867 868 #define mlock_dereference(X, br) \ 869 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 870 871 static inline struct hlist_node * 872 br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) { 873 #if IS_ENABLED(CONFIG_IPV6) 874 if (skb->protocol == htons(ETH_P_IPV6)) 875 return rcu_dereference(hlist_first_rcu(&b->ip6_mc_router_list)); 876 #endif 877 return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list)); 878 } 879 880 static inline struct net_bridge_port * 881 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) { 882 #if IS_ENABLED(CONFIG_IPV6) 883 if (skb->protocol == htons(ETH_P_IPV6)) 884 return hlist_entry_safe(rp, struct net_bridge_port, ip6_rlist); 885 #endif 886 return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); 887 } 888 889 static inline bool br_ip4_multicast_is_router(struct net_bridge *br) 890 { 891 return timer_pending(&br->ip4_mc_router_timer); 892 } 893 894 static inline bool br_ip6_multicast_is_router(struct net_bridge *br) 895 { 896 #if IS_ENABLED(CONFIG_IPV6) 897 return timer_pending(&br->ip6_mc_router_timer); 898 #else 899 return false; 900 #endif 901 } 902 903 static inline bool 904 br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) 905 { 906 switch (br->multicast_router) { 907 case MDB_RTR_TYPE_PERM: 908 return true; 909 case MDB_RTR_TYPE_TEMP_QUERY: 910 if (skb) { 911 if (skb->protocol == htons(ETH_P_IP)) 912 return br_ip4_multicast_is_router(br); 913 else if (skb->protocol == htons(ETH_P_IPV6)) 914 return br_ip6_multicast_is_router(br); 915 } else { 916 return br_ip4_multicast_is_router(br) || 917 br_ip6_multicast_is_router(br); 918 } 919 fallthrough; 920 default: 921 return false; 922 } 923 } 924 925 static inline bool 926 __br_multicast_querier_exists(struct net_bridge *br, 927 struct bridge_mcast_other_query *querier, 928 const bool is_ipv6) 929 { 930 bool own_querier_enabled; 931 932 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 933 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 934 own_querier_enabled = false; 935 else 936 own_querier_enabled = true; 937 } else { 938 own_querier_enabled = false; 939 } 940 941 return time_is_before_jiffies(querier->delay_time) && 942 (own_querier_enabled || timer_pending(&querier->timer)); 943 } 944 945 static inline bool br_multicast_querier_exists(struct net_bridge *br, 946 struct ethhdr *eth, 947 const struct net_bridge_mdb_entry *mdb) 948 { 949 switch (eth->h_proto) { 950 case (htons(ETH_P_IP)): 951 return __br_multicast_querier_exists(br, 952 &br->ip4_other_query, false); 953 #if IS_ENABLED(CONFIG_IPV6) 954 case (htons(ETH_P_IPV6)): 955 return __br_multicast_querier_exists(br, 956 &br->ip6_other_query, true); 957 #endif 958 default: 959 return !!mdb && br_group_is_l2(&mdb->addr); 960 } 961 } 962 963 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 964 { 965 switch (ip->proto) { 966 case htons(ETH_P_IP): 967 return ipv4_is_zeronet(ip->src.ip4); 968 #if IS_ENABLED(CONFIG_IPV6) 969 case htons(ETH_P_IPV6): 970 return ipv6_addr_any(&ip->src.ip6); 971 #endif 972 default: 973 return false; 974 } 975 } 976 977 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 978 __be16 proto) 979 { 980 switch (proto) { 981 case htons(ETH_P_IP): 982 return !!(br->multicast_igmp_version == 3); 983 #if IS_ENABLED(CONFIG_IPV6) 984 case htons(ETH_P_IPV6): 985 return !!(br->multicast_mld_version == 2); 986 #endif 987 default: 988 return false; 989 } 990 } 991 992 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 993 { 994 return BR_INPUT_SKB_CB(skb)->igmp; 995 } 996 997 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 998 { 999 return br->multicast_last_member_interval * 1000 br->multicast_last_member_count; 1001 } 1002 1003 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 1004 { 1005 /* use the RFC default of 2 for QRV */ 1006 return 2 * br->multicast_query_interval + 1007 br->multicast_query_response_interval; 1008 } 1009 #else 1010 static inline int br_multicast_rcv(struct net_bridge *br, 1011 struct net_bridge_port *port, 1012 struct sk_buff *skb, 1013 u16 vid) 1014 { 1015 return 0; 1016 } 1017 1018 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 1019 struct sk_buff *skb, u16 vid) 1020 { 1021 return NULL; 1022 } 1023 1024 static inline int br_multicast_add_port(struct net_bridge_port *port) 1025 { 1026 return 0; 1027 } 1028 1029 static inline void br_multicast_del_port(struct net_bridge_port *port) 1030 { 1031 } 1032 1033 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1034 { 1035 } 1036 1037 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1038 { 1039 } 1040 1041 static inline void br_multicast_init(struct net_bridge *br) 1042 { 1043 } 1044 1045 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1046 { 1047 } 1048 1049 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1050 { 1051 } 1052 1053 static inline void br_multicast_open(struct net_bridge *br) 1054 { 1055 } 1056 1057 static inline void br_multicast_stop(struct net_bridge *br) 1058 { 1059 } 1060 1061 static inline void br_multicast_dev_del(struct net_bridge *br) 1062 { 1063 } 1064 1065 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1066 struct sk_buff *skb, 1067 bool local_rcv, bool local_orig) 1068 { 1069 } 1070 1071 static inline bool br_multicast_is_router(struct net_bridge *br) 1072 { 1073 return false; 1074 } 1075 1076 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1077 struct ethhdr *eth, 1078 const struct net_bridge_mdb_entry *mdb) 1079 { 1080 return false; 1081 } 1082 1083 static inline void br_mdb_init(void) 1084 { 1085 } 1086 1087 static inline void br_mdb_uninit(void) 1088 { 1089 } 1090 1091 static inline int br_mdb_hash_init(struct net_bridge *br) 1092 { 1093 return 0; 1094 } 1095 1096 static inline void br_mdb_hash_fini(struct net_bridge *br) 1097 { 1098 } 1099 1100 static inline void br_multicast_count(struct net_bridge *br, 1101 const struct net_bridge_port *p, 1102 const struct sk_buff *skb, 1103 u8 type, u8 dir) 1104 { 1105 } 1106 1107 static inline int br_multicast_init_stats(struct net_bridge *br) 1108 { 1109 return 0; 1110 } 1111 1112 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1113 { 1114 } 1115 1116 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1117 { 1118 return 0; 1119 } 1120 #endif 1121 1122 /* br_vlan.c */ 1123 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1124 bool br_allowed_ingress(const struct net_bridge *br, 1125 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1126 u16 *vid, u8 *state); 1127 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1128 const struct sk_buff *skb); 1129 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1130 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1131 const struct net_bridge_port *port, 1132 struct net_bridge_vlan_group *vg, 1133 struct sk_buff *skb); 1134 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1135 bool *changed, struct netlink_ext_ack *extack); 1136 int br_vlan_delete(struct net_bridge *br, u16 vid); 1137 void br_vlan_flush(struct net_bridge *br); 1138 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1139 void br_recalculate_fwd_mask(struct net_bridge *br); 1140 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1141 struct netlink_ext_ack *extack); 1142 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1143 struct netlink_ext_ack *extack); 1144 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1145 struct netlink_ext_ack *extack); 1146 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1147 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1148 int br_vlan_init(struct net_bridge *br); 1149 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1150 struct netlink_ext_ack *extack); 1151 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1152 struct netlink_ext_ack *extack); 1153 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1154 bool *changed, struct netlink_ext_ack *extack); 1155 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1156 void nbp_vlan_flush(struct net_bridge_port *port); 1157 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1158 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1159 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1160 struct pcpu_sw_netstats *stats); 1161 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1162 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1163 void *ptr); 1164 void br_vlan_rtnl_init(void); 1165 void br_vlan_rtnl_uninit(void); 1166 void br_vlan_notify(const struct net_bridge *br, 1167 const struct net_bridge_port *p, 1168 u16 vid, u16 vid_range, 1169 int cmd); 1170 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1171 const struct net_bridge_vlan *range_end); 1172 1173 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1174 struct net_device_path_ctx *ctx, 1175 struct net_device_path *path); 1176 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1177 struct net_bridge_port *dst, 1178 struct net_device_path *path); 1179 1180 static inline struct net_bridge_vlan_group *br_vlan_group( 1181 const struct net_bridge *br) 1182 { 1183 return rtnl_dereference(br->vlgrp); 1184 } 1185 1186 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1187 const struct net_bridge_port *p) 1188 { 1189 return rtnl_dereference(p->vlgrp); 1190 } 1191 1192 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1193 const struct net_bridge *br) 1194 { 1195 return rcu_dereference(br->vlgrp); 1196 } 1197 1198 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1199 const struct net_bridge_port *p) 1200 { 1201 return rcu_dereference(p->vlgrp); 1202 } 1203 1204 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1205 * skb, the vlan tag will always be present if the frame was tagged. 1206 */ 1207 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1208 { 1209 int err = 0; 1210 1211 if (skb_vlan_tag_present(skb)) { 1212 *vid = skb_vlan_tag_get_id(skb); 1213 } else { 1214 *vid = 0; 1215 err = -EINVAL; 1216 } 1217 1218 return err; 1219 } 1220 1221 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1222 { 1223 if (!vg) 1224 return 0; 1225 1226 smp_rmb(); 1227 return vg->pvid; 1228 } 1229 1230 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1231 { 1232 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1233 } 1234 #else 1235 static inline bool br_allowed_ingress(const struct net_bridge *br, 1236 struct net_bridge_vlan_group *vg, 1237 struct sk_buff *skb, 1238 u16 *vid, u8 *state) 1239 { 1240 return true; 1241 } 1242 1243 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1244 const struct sk_buff *skb) 1245 { 1246 return true; 1247 } 1248 1249 static inline bool br_should_learn(struct net_bridge_port *p, 1250 struct sk_buff *skb, u16 *vid) 1251 { 1252 return true; 1253 } 1254 1255 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1256 const struct net_bridge_port *port, 1257 struct net_bridge_vlan_group *vg, 1258 struct sk_buff *skb) 1259 { 1260 return skb; 1261 } 1262 1263 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1264 bool *changed, struct netlink_ext_ack *extack) 1265 { 1266 *changed = false; 1267 return -EOPNOTSUPP; 1268 } 1269 1270 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1271 { 1272 return -EOPNOTSUPP; 1273 } 1274 1275 static inline void br_vlan_flush(struct net_bridge *br) 1276 { 1277 } 1278 1279 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1280 { 1281 } 1282 1283 static inline int br_vlan_init(struct net_bridge *br) 1284 { 1285 return 0; 1286 } 1287 1288 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1289 bool *changed, struct netlink_ext_ack *extack) 1290 { 1291 *changed = false; 1292 return -EOPNOTSUPP; 1293 } 1294 1295 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1296 { 1297 return -EOPNOTSUPP; 1298 } 1299 1300 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1301 { 1302 } 1303 1304 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1305 u16 vid) 1306 { 1307 return NULL; 1308 } 1309 1310 static inline int nbp_vlan_init(struct net_bridge_port *port, 1311 struct netlink_ext_ack *extack) 1312 { 1313 return 0; 1314 } 1315 1316 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1317 { 1318 return 0; 1319 } 1320 1321 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1322 { 1323 return 0; 1324 } 1325 1326 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1327 unsigned long val, 1328 struct netlink_ext_ack *extack) 1329 { 1330 return -EOPNOTSUPP; 1331 } 1332 1333 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1334 u32 filter_mask) 1335 { 1336 return 0; 1337 } 1338 1339 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1340 struct net_device_path_ctx *ctx, 1341 struct net_device_path *path) 1342 { 1343 } 1344 1345 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1346 struct net_bridge_port *dst, 1347 struct net_device_path *path) 1348 { 1349 return 0; 1350 } 1351 1352 static inline struct net_bridge_vlan_group *br_vlan_group( 1353 const struct net_bridge *br) 1354 { 1355 return NULL; 1356 } 1357 1358 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1359 const struct net_bridge_port *p) 1360 { 1361 return NULL; 1362 } 1363 1364 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1365 const struct net_bridge *br) 1366 { 1367 return NULL; 1368 } 1369 1370 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1371 const struct net_bridge_port *p) 1372 { 1373 return NULL; 1374 } 1375 1376 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1377 struct pcpu_sw_netstats *stats) 1378 { 1379 } 1380 1381 static inline void br_vlan_port_event(struct net_bridge_port *p, 1382 unsigned long event) 1383 { 1384 } 1385 1386 static inline int br_vlan_bridge_event(struct net_device *dev, 1387 unsigned long event, void *ptr) 1388 { 1389 return 0; 1390 } 1391 1392 static inline void br_vlan_rtnl_init(void) 1393 { 1394 } 1395 1396 static inline void br_vlan_rtnl_uninit(void) 1397 { 1398 } 1399 1400 static inline void br_vlan_notify(const struct net_bridge *br, 1401 const struct net_bridge_port *p, 1402 u16 vid, u16 vid_range, 1403 int cmd) 1404 { 1405 } 1406 1407 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1408 const struct net_bridge_vlan *range_end) 1409 { 1410 return true; 1411 } 1412 #endif 1413 1414 /* br_vlan_options.c */ 1415 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1416 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1417 const struct net_bridge_vlan *range_end); 1418 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1419 size_t br_vlan_opts_nl_size(void); 1420 int br_vlan_process_options(const struct net_bridge *br, 1421 const struct net_bridge_port *p, 1422 struct net_bridge_vlan *range_start, 1423 struct net_bridge_vlan *range_end, 1424 struct nlattr **tb, 1425 struct netlink_ext_ack *extack); 1426 1427 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1428 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1429 { 1430 return READ_ONCE(v->state); 1431 } 1432 1433 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1434 { 1435 WRITE_ONCE(v->state, state); 1436 } 1437 1438 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1439 { 1440 return READ_ONCE(vg->pvid_state); 1441 } 1442 1443 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1444 u8 state) 1445 { 1446 WRITE_ONCE(vg->pvid_state, state); 1447 } 1448 1449 /* learn_allow is true at ingress and false at egress */ 1450 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1451 { 1452 switch (state) { 1453 case BR_STATE_LEARNING: 1454 return learn_allow; 1455 case BR_STATE_FORWARDING: 1456 return true; 1457 default: 1458 return false; 1459 } 1460 } 1461 #endif 1462 1463 struct nf_br_ops { 1464 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1465 }; 1466 extern const struct nf_br_ops __rcu *nf_br_ops; 1467 1468 /* br_netfilter.c */ 1469 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1470 int br_nf_core_init(void); 1471 void br_nf_core_fini(void); 1472 void br_netfilter_rtable_init(struct net_bridge *); 1473 #else 1474 static inline int br_nf_core_init(void) { return 0; } 1475 static inline void br_nf_core_fini(void) {} 1476 #define br_netfilter_rtable_init(x) 1477 #endif 1478 1479 /* br_stp.c */ 1480 void br_set_state(struct net_bridge_port *p, unsigned int state); 1481 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1482 void br_init_port(struct net_bridge_port *p); 1483 void br_become_designated_port(struct net_bridge_port *p); 1484 1485 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1486 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1487 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1488 int br_set_max_age(struct net_bridge *br, unsigned long x); 1489 int __set_ageing_time(struct net_device *dev, unsigned long t); 1490 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1491 1492 1493 /* br_stp_if.c */ 1494 void br_stp_enable_bridge(struct net_bridge *br); 1495 void br_stp_disable_bridge(struct net_bridge *br); 1496 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1497 struct netlink_ext_ack *extack); 1498 void br_stp_enable_port(struct net_bridge_port *p); 1499 void br_stp_disable_port(struct net_bridge_port *p); 1500 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1501 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1502 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1503 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1504 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1505 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1506 1507 /* br_stp_bpdu.c */ 1508 struct stp_proto; 1509 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1510 struct net_device *dev); 1511 1512 /* br_stp_timer.c */ 1513 void br_stp_timer_init(struct net_bridge *br); 1514 void br_stp_port_timer_init(struct net_bridge_port *p); 1515 unsigned long br_timer_value(const struct timer_list *timer); 1516 1517 /* br.c */ 1518 #if IS_ENABLED(CONFIG_ATM_LANE) 1519 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1520 #endif 1521 1522 /* br_mrp.c */ 1523 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1524 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1525 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1526 bool br_mrp_enabled(struct net_bridge *br); 1527 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1528 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1529 #else 1530 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1531 struct nlattr *attr, int cmd, 1532 struct netlink_ext_ack *extack) 1533 { 1534 return -EOPNOTSUPP; 1535 } 1536 1537 static inline bool br_mrp_enabled(struct net_bridge *br) 1538 { 1539 return false; 1540 } 1541 1542 static inline void br_mrp_port_del(struct net_bridge *br, 1543 struct net_bridge_port *p) 1544 { 1545 } 1546 1547 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1548 { 1549 return 0; 1550 } 1551 1552 #endif 1553 1554 /* br_cfm.c */ 1555 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1556 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1557 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1558 bool br_cfm_created(struct net_bridge *br); 1559 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1560 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1561 int br_cfm_status_fill_info(struct sk_buff *skb, 1562 struct net_bridge *br, 1563 bool getlink); 1564 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1565 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1566 #else 1567 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1568 struct nlattr *attr, int cmd, 1569 struct netlink_ext_ack *extack) 1570 { 1571 return -EOPNOTSUPP; 1572 } 1573 1574 static inline bool br_cfm_created(struct net_bridge *br) 1575 { 1576 return false; 1577 } 1578 1579 static inline void br_cfm_port_del(struct net_bridge *br, 1580 struct net_bridge_port *p) 1581 { 1582 } 1583 1584 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1585 { 1586 return -EOPNOTSUPP; 1587 } 1588 1589 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1590 struct net_bridge *br, 1591 bool getlink) 1592 { 1593 return -EOPNOTSUPP; 1594 } 1595 1596 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1597 { 1598 return -EOPNOTSUPP; 1599 } 1600 1601 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1602 { 1603 return -EOPNOTSUPP; 1604 } 1605 #endif 1606 1607 /* br_netlink.c */ 1608 extern struct rtnl_link_ops br_link_ops; 1609 int br_netlink_init(void); 1610 void br_netlink_fini(void); 1611 void br_ifinfo_notify(int event, const struct net_bridge *br, 1612 const struct net_bridge_port *port); 1613 void br_info_notify(int event, const struct net_bridge *br, 1614 const struct net_bridge_port *port, u32 filter); 1615 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1616 struct netlink_ext_ack *extack); 1617 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1618 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1619 u32 filter_mask, int nlflags); 1620 int br_process_vlan_info(struct net_bridge *br, 1621 struct net_bridge_port *p, int cmd, 1622 struct bridge_vlan_info *vinfo_curr, 1623 struct bridge_vlan_info **vinfo_last, 1624 bool *changed, 1625 struct netlink_ext_ack *extack); 1626 1627 #ifdef CONFIG_SYSFS 1628 /* br_sysfs_if.c */ 1629 extern const struct sysfs_ops brport_sysfs_ops; 1630 int br_sysfs_addif(struct net_bridge_port *p); 1631 int br_sysfs_renameif(struct net_bridge_port *p); 1632 1633 /* br_sysfs_br.c */ 1634 int br_sysfs_addbr(struct net_device *dev); 1635 void br_sysfs_delbr(struct net_device *dev); 1636 1637 #else 1638 1639 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1640 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1641 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1642 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1643 #endif /* CONFIG_SYSFS */ 1644 1645 /* br_switchdev.c */ 1646 #ifdef CONFIG_NET_SWITCHDEV 1647 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1648 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1649 struct sk_buff *skb); 1650 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1651 const struct sk_buff *skb); 1652 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1653 unsigned long flags, 1654 unsigned long mask, 1655 struct netlink_ext_ack *extack); 1656 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, 1657 int type); 1658 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1659 struct netlink_ext_ack *extack); 1660 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1661 1662 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1663 { 1664 skb->offload_fwd_mark = 0; 1665 } 1666 #else 1667 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1668 { 1669 return 0; 1670 } 1671 1672 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1673 struct sk_buff *skb) 1674 { 1675 } 1676 1677 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1678 const struct sk_buff *skb) 1679 { 1680 return true; 1681 } 1682 1683 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1684 unsigned long flags, 1685 unsigned long mask, 1686 struct netlink_ext_ack *extack) 1687 { 1688 return 0; 1689 } 1690 1691 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1692 u16 vid, u16 flags, 1693 struct netlink_ext_ack *extack) 1694 { 1695 return -EOPNOTSUPP; 1696 } 1697 1698 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1699 { 1700 return -EOPNOTSUPP; 1701 } 1702 1703 static inline void 1704 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) 1705 { 1706 } 1707 1708 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1709 { 1710 } 1711 #endif /* CONFIG_NET_SWITCHDEV */ 1712 1713 /* br_arp_nd_proxy.c */ 1714 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1715 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1716 u16 vid, struct net_bridge_port *p); 1717 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1718 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1719 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1720 #endif 1721