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 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 93 struct net_bridge_mcast_port { 94 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 95 struct net_bridge_port *port; 96 97 struct bridge_mcast_own_query ip4_own_query; 98 struct timer_list ip4_mc_router_timer; 99 struct hlist_node ip4_rlist; 100 #if IS_ENABLED(CONFIG_IPV6) 101 struct bridge_mcast_own_query ip6_own_query; 102 struct timer_list ip6_mc_router_timer; 103 struct hlist_node ip6_rlist; 104 #endif /* IS_ENABLED(CONFIG_IPV6) */ 105 unsigned char multicast_router; 106 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 107 }; 108 109 struct br_tunnel_info { 110 __be64 tunnel_id; 111 struct metadata_dst __rcu *tunnel_dst; 112 }; 113 114 /* private vlan flags */ 115 enum { 116 BR_VLFLAG_PER_PORT_STATS = BIT(0), 117 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 118 }; 119 120 /** 121 * struct net_bridge_vlan - per-vlan entry 122 * 123 * @vnode: rhashtable member 124 * @vid: VLAN id 125 * @flags: bridge vlan flags 126 * @priv_flags: private (in-kernel) bridge vlan flags 127 * @state: STP state (e.g. blocking, learning, forwarding) 128 * @stats: per-cpu VLAN statistics 129 * @br: if MASTER flag set, this points to a bridge struct 130 * @port: if MASTER flag unset, this points to a port struct 131 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 132 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 133 * for this VLAN entry 134 * @vlist: sorted list of VLAN entries 135 * @rcu: used for entry destruction 136 * 137 * This structure is shared between the global per-VLAN entries contained in 138 * the bridge rhashtable and the local per-port per-VLAN entries contained in 139 * the port's rhashtable. The union entries should be interpreted depending on 140 * the entry flags that are set. 141 */ 142 struct net_bridge_vlan { 143 struct rhash_head vnode; 144 struct rhash_head tnode; 145 u16 vid; 146 u16 flags; 147 u16 priv_flags; 148 u8 state; 149 struct pcpu_sw_netstats __percpu *stats; 150 union { 151 struct net_bridge *br; 152 struct net_bridge_port *port; 153 }; 154 union { 155 refcount_t refcnt; 156 struct net_bridge_vlan *brvlan; 157 }; 158 159 struct br_tunnel_info tinfo; 160 161 struct list_head vlist; 162 163 struct rcu_head rcu; 164 }; 165 166 /** 167 * struct net_bridge_vlan_group 168 * 169 * @vlan_hash: VLAN entry rhashtable 170 * @vlan_list: sorted VLAN entry list 171 * @num_vlans: number of total VLAN entries 172 * @pvid: PVID VLAN id 173 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 174 * 175 * IMPORTANT: Be careful when checking if there're VLAN entries using list 176 * primitives because the bridge can have entries in its list which 177 * are just for global context but not for filtering, i.e. they have 178 * the master flag set but not the brentry flag. If you have to check 179 * if there're "real" entries in the bridge please test @num_vlans 180 */ 181 struct net_bridge_vlan_group { 182 struct rhashtable vlan_hash; 183 struct rhashtable tunnel_hash; 184 struct list_head vlan_list; 185 u16 num_vlans; 186 u16 pvid; 187 u8 pvid_state; 188 }; 189 190 /* bridge fdb flags */ 191 enum { 192 BR_FDB_LOCAL, 193 BR_FDB_STATIC, 194 BR_FDB_STICKY, 195 BR_FDB_ADDED_BY_USER, 196 BR_FDB_ADDED_BY_EXT_LEARN, 197 BR_FDB_OFFLOADED, 198 BR_FDB_NOTIFY, 199 BR_FDB_NOTIFY_INACTIVE 200 }; 201 202 struct net_bridge_fdb_key { 203 mac_addr addr; 204 u16 vlan_id; 205 }; 206 207 struct net_bridge_fdb_entry { 208 struct rhash_head rhnode; 209 struct net_bridge_port *dst; 210 211 struct net_bridge_fdb_key key; 212 struct hlist_node fdb_node; 213 unsigned long flags; 214 215 /* write-heavy members should not affect lookups */ 216 unsigned long updated ____cacheline_aligned_in_smp; 217 unsigned long used; 218 219 struct rcu_head rcu; 220 }; 221 222 #define MDB_PG_FLAGS_PERMANENT BIT(0) 223 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 224 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 225 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 226 #define MDB_PG_FLAGS_BLOCKED BIT(4) 227 228 #define PG_SRC_ENT_LIMIT 32 229 230 #define BR_SGRP_F_DELETE BIT(0) 231 #define BR_SGRP_F_SEND BIT(1) 232 #define BR_SGRP_F_INSTALLED BIT(2) 233 234 struct net_bridge_mcast_gc { 235 struct hlist_node gc_node; 236 void (*destroy)(struct net_bridge_mcast_gc *gc); 237 }; 238 239 struct net_bridge_group_src { 240 struct hlist_node node; 241 242 struct br_ip addr; 243 struct net_bridge_port_group *pg; 244 u8 flags; 245 u8 src_query_rexmit_cnt; 246 struct timer_list timer; 247 248 struct net_bridge *br; 249 struct net_bridge_mcast_gc mcast_gc; 250 struct rcu_head rcu; 251 }; 252 253 struct net_bridge_port_group_sg_key { 254 struct net_bridge_port *port; 255 struct br_ip addr; 256 }; 257 258 struct net_bridge_port_group { 259 struct net_bridge_port_group __rcu *next; 260 struct net_bridge_port_group_sg_key key; 261 unsigned char eth_addr[ETH_ALEN] __aligned(2); 262 unsigned char flags; 263 unsigned char filter_mode; 264 unsigned char grp_query_rexmit_cnt; 265 unsigned char rt_protocol; 266 267 struct hlist_head src_list; 268 unsigned int src_ents; 269 struct timer_list timer; 270 struct timer_list rexmit_timer; 271 struct hlist_node mglist; 272 struct rb_root eht_set_tree; 273 struct rb_root eht_host_tree; 274 275 struct rhash_head rhnode; 276 struct net_bridge_mcast_gc mcast_gc; 277 struct rcu_head rcu; 278 }; 279 280 struct net_bridge_mdb_entry { 281 struct rhash_head rhnode; 282 struct net_bridge *br; 283 struct net_bridge_port_group __rcu *ports; 284 struct br_ip addr; 285 bool host_joined; 286 287 struct timer_list timer; 288 struct hlist_node mdb_node; 289 290 struct net_bridge_mcast_gc mcast_gc; 291 struct rcu_head rcu; 292 }; 293 294 struct net_bridge_port { 295 struct net_bridge *br; 296 struct net_device *dev; 297 struct list_head list; 298 299 unsigned long flags; 300 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 301 struct net_bridge_vlan_group __rcu *vlgrp; 302 #endif 303 struct net_bridge_port __rcu *backup_port; 304 305 /* STP */ 306 u8 priority; 307 u8 state; 308 u16 port_no; 309 unsigned char topology_change_ack; 310 unsigned char config_pending; 311 port_id port_id; 312 port_id designated_port; 313 bridge_id designated_root; 314 bridge_id designated_bridge; 315 u32 path_cost; 316 u32 designated_cost; 317 unsigned long designated_age; 318 319 struct timer_list forward_delay_timer; 320 struct timer_list hold_timer; 321 struct timer_list message_age_timer; 322 struct kobject kobj; 323 struct rcu_head rcu; 324 325 struct net_bridge_mcast_port multicast_ctx; 326 327 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 328 struct bridge_mcast_stats __percpu *mcast_stats; 329 330 u32 multicast_eht_hosts_limit; 331 u32 multicast_eht_hosts_cnt; 332 struct hlist_head mglist; 333 #endif 334 335 #ifdef CONFIG_SYSFS 336 char sysfs_name[IFNAMSIZ]; 337 #endif 338 339 #ifdef CONFIG_NET_POLL_CONTROLLER 340 struct netpoll *np; 341 #endif 342 #ifdef CONFIG_NET_SWITCHDEV 343 int offload_fwd_mark; 344 #endif 345 u16 group_fwd_mask; 346 u16 backup_redirected_cnt; 347 348 struct bridge_stp_xstats stp_xstats; 349 }; 350 351 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 352 353 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 354 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 355 356 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 357 { 358 return rcu_dereference(dev->rx_handler_data); 359 } 360 361 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 362 { 363 return netif_is_bridge_port(dev) ? 364 rtnl_dereference(dev->rx_handler_data) : NULL; 365 } 366 367 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 368 { 369 return netif_is_bridge_port(dev) ? 370 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 371 } 372 373 enum net_bridge_opts { 374 BROPT_VLAN_ENABLED, 375 BROPT_VLAN_STATS_ENABLED, 376 BROPT_NF_CALL_IPTABLES, 377 BROPT_NF_CALL_IP6TABLES, 378 BROPT_NF_CALL_ARPTABLES, 379 BROPT_GROUP_ADDR_SET, 380 BROPT_MULTICAST_ENABLED, 381 BROPT_MULTICAST_QUERIER, 382 BROPT_MULTICAST_QUERY_USE_IFADDR, 383 BROPT_MULTICAST_STATS_ENABLED, 384 BROPT_HAS_IPV6_ADDR, 385 BROPT_NEIGH_SUPPRESS_ENABLED, 386 BROPT_MTU_SET_BY_USER, 387 BROPT_VLAN_STATS_PER_PORT, 388 BROPT_NO_LL_LEARN, 389 BROPT_VLAN_BRIDGE_BINDING, 390 }; 391 392 struct net_bridge { 393 spinlock_t lock; 394 spinlock_t hash_lock; 395 struct hlist_head frame_type_list; 396 struct net_device *dev; 397 unsigned long options; 398 /* These fields are accessed on each packet */ 399 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 400 __be16 vlan_proto; 401 u16 default_pvid; 402 struct net_bridge_vlan_group __rcu *vlgrp; 403 #endif 404 405 struct rhashtable fdb_hash_tbl; 406 struct list_head port_list; 407 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 408 union { 409 struct rtable fake_rtable; 410 struct rt6_info fake_rt6_info; 411 }; 412 #endif 413 u16 group_fwd_mask; 414 u16 group_fwd_mask_required; 415 416 /* STP */ 417 bridge_id designated_root; 418 bridge_id bridge_id; 419 unsigned char topology_change; 420 unsigned char topology_change_detected; 421 u16 root_port; 422 unsigned long max_age; 423 unsigned long hello_time; 424 unsigned long forward_delay; 425 unsigned long ageing_time; 426 unsigned long bridge_max_age; 427 unsigned long bridge_hello_time; 428 unsigned long bridge_forward_delay; 429 unsigned long bridge_ageing_time; 430 u32 root_path_cost; 431 432 u8 group_addr[ETH_ALEN]; 433 434 enum { 435 BR_NO_STP, /* no spanning tree */ 436 BR_KERNEL_STP, /* old STP in kernel */ 437 BR_USER_STP, /* new RSTP in userspace */ 438 } stp_enabled; 439 440 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 441 442 u32 hash_max; 443 444 u32 multicast_last_member_count; 445 u32 multicast_startup_query_count; 446 447 u8 multicast_igmp_version; 448 u8 multicast_router; 449 #if IS_ENABLED(CONFIG_IPV6) 450 u8 multicast_mld_version; 451 #endif 452 spinlock_t multicast_lock; 453 unsigned long multicast_last_member_interval; 454 unsigned long multicast_membership_interval; 455 unsigned long multicast_querier_interval; 456 unsigned long multicast_query_interval; 457 unsigned long multicast_query_response_interval; 458 unsigned long multicast_startup_query_interval; 459 460 struct rhashtable mdb_hash_tbl; 461 struct rhashtable sg_port_tbl; 462 463 struct hlist_head mcast_gc_list; 464 struct hlist_head mdb_list; 465 466 struct hlist_head ip4_mc_router_list; 467 struct timer_list ip4_mc_router_timer; 468 struct bridge_mcast_other_query ip4_other_query; 469 struct bridge_mcast_own_query ip4_own_query; 470 struct bridge_mcast_querier ip4_querier; 471 struct bridge_mcast_stats __percpu *mcast_stats; 472 #if IS_ENABLED(CONFIG_IPV6) 473 struct hlist_head ip6_mc_router_list; 474 struct timer_list ip6_mc_router_timer; 475 struct bridge_mcast_other_query ip6_other_query; 476 struct bridge_mcast_own_query ip6_own_query; 477 struct bridge_mcast_querier ip6_querier; 478 #endif /* IS_ENABLED(CONFIG_IPV6) */ 479 struct work_struct mcast_gc_work; 480 #endif 481 482 struct timer_list hello_timer; 483 struct timer_list tcn_timer; 484 struct timer_list topology_change_timer; 485 struct delayed_work gc_work; 486 struct kobject *ifobj; 487 u32 auto_cnt; 488 489 #ifdef CONFIG_NET_SWITCHDEV 490 int offload_fwd_mark; 491 #endif 492 struct hlist_head fdb_list; 493 494 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 495 struct hlist_head mrp_list; 496 #endif 497 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 498 struct hlist_head mep_list; 499 #endif 500 }; 501 502 struct br_input_skb_cb { 503 struct net_device *brdev; 504 505 u16 frag_max_size; 506 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 507 u8 igmp; 508 u8 mrouters_only:1; 509 #endif 510 u8 proxyarp_replied:1; 511 u8 src_port_isolated:1; 512 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 513 u8 vlan_filtered:1; 514 #endif 515 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 516 u8 br_netfilter_broute:1; 517 #endif 518 519 #ifdef CONFIG_NET_SWITCHDEV 520 int offload_fwd_mark; 521 #endif 522 }; 523 524 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 525 526 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 527 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 528 #else 529 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 530 #endif 531 532 #define br_printk(level, br, format, args...) \ 533 printk(level "%s: " format, (br)->dev->name, ##args) 534 535 #define br_err(__br, format, args...) \ 536 br_printk(KERN_ERR, __br, format, ##args) 537 #define br_warn(__br, format, args...) \ 538 br_printk(KERN_WARNING, __br, format, ##args) 539 #define br_notice(__br, format, args...) \ 540 br_printk(KERN_NOTICE, __br, format, ##args) 541 #define br_info(__br, format, args...) \ 542 br_printk(KERN_INFO, __br, format, ##args) 543 544 #define br_debug(br, format, args...) \ 545 pr_debug("%s: " format, (br)->dev->name, ##args) 546 547 /* called under bridge lock */ 548 static inline int br_is_root_bridge(const struct net_bridge *br) 549 { 550 return !memcmp(&br->bridge_id, &br->designated_root, 8); 551 } 552 553 /* check if a VLAN entry is global */ 554 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 555 { 556 return v->flags & BRIDGE_VLAN_INFO_MASTER; 557 } 558 559 /* check if a VLAN entry is used by the bridge */ 560 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 561 { 562 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 563 } 564 565 /* check if we should use the vlan entry, returns false if it's only context */ 566 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 567 { 568 if (br_vlan_is_master(v)) { 569 if (br_vlan_is_brentry(v)) 570 return true; 571 else 572 return false; 573 } 574 575 return true; 576 } 577 578 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 579 { 580 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 581 } 582 583 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 584 { 585 bool ret = vid > 0 && vid < VLAN_VID_MASK; 586 587 if (!ret) 588 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 589 590 return ret; 591 } 592 593 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 594 const struct bridge_vlan_info *last, 595 struct netlink_ext_ack *extack) 596 { 597 /* pvid flag is not allowed in ranges */ 598 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 599 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 600 return false; 601 } 602 603 /* when cur is the range end, check if: 604 * - it has range start flag 605 * - range ids are invalid (end is equal to or before start) 606 */ 607 if (last) { 608 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 609 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 610 return false; 611 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 612 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 613 return false; 614 } else if (cur->vid <= last->vid) { 615 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 616 return false; 617 } 618 } 619 620 /* check for required range flags */ 621 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 622 BRIDGE_VLAN_INFO_RANGE_END))) { 623 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 624 return false; 625 } 626 627 return true; 628 } 629 630 static inline int br_afspec_cmd_to_rtm(int cmd) 631 { 632 switch (cmd) { 633 case RTM_SETLINK: 634 return RTM_NEWVLAN; 635 case RTM_DELLINK: 636 return RTM_DELVLAN; 637 } 638 639 return 0; 640 } 641 642 static inline int br_opt_get(const struct net_bridge *br, 643 enum net_bridge_opts opt) 644 { 645 return test_bit(opt, &br->options); 646 } 647 648 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 649 struct netlink_ext_ack *extack); 650 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 651 int br_boolopt_multi_toggle(struct net_bridge *br, 652 struct br_boolopt_multi *bm, 653 struct netlink_ext_ack *extack); 654 void br_boolopt_multi_get(const struct net_bridge *br, 655 struct br_boolopt_multi *bm); 656 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 657 658 /* br_device.c */ 659 void br_dev_setup(struct net_device *dev); 660 void br_dev_delete(struct net_device *dev, struct list_head *list); 661 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 662 #ifdef CONFIG_NET_POLL_CONTROLLER 663 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 664 struct sk_buff *skb) 665 { 666 netpoll_send_skb(p->np, skb); 667 } 668 669 int br_netpoll_enable(struct net_bridge_port *p); 670 void br_netpoll_disable(struct net_bridge_port *p); 671 #else 672 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 673 struct sk_buff *skb) 674 { 675 } 676 677 static inline int br_netpoll_enable(struct net_bridge_port *p) 678 { 679 return 0; 680 } 681 682 static inline void br_netpoll_disable(struct net_bridge_port *p) 683 { 684 } 685 #endif 686 687 /* br_fdb.c */ 688 int br_fdb_init(void); 689 void br_fdb_fini(void); 690 int br_fdb_hash_init(struct net_bridge *br); 691 void br_fdb_hash_fini(struct net_bridge *br); 692 void br_fdb_flush(struct net_bridge *br); 693 void br_fdb_find_delete_local(struct net_bridge *br, 694 const struct net_bridge_port *p, 695 const unsigned char *addr, u16 vid); 696 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 697 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 698 void br_fdb_cleanup(struct work_struct *work); 699 void br_fdb_delete_by_port(struct net_bridge *br, 700 const struct net_bridge_port *p, u16 vid, int do_all); 701 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 702 const unsigned char *addr, 703 __u16 vid); 704 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 705 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 706 unsigned long off); 707 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 708 const unsigned char *addr, u16 vid); 709 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 710 const unsigned char *addr, u16 vid, unsigned long flags); 711 712 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 713 struct net_device *dev, const unsigned char *addr, u16 vid); 714 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 715 const unsigned char *addr, u16 vid, u16 nlh_flags, 716 struct netlink_ext_ack *extack); 717 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 718 struct net_device *dev, struct net_device *fdev, int *idx); 719 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 720 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 721 struct netlink_ext_ack *extack); 722 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 723 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 724 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 725 const unsigned char *addr, u16 vid, 726 bool swdev_notify); 727 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 728 const unsigned char *addr, u16 vid, 729 bool swdev_notify); 730 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 731 const unsigned char *addr, u16 vid, bool offloaded); 732 733 /* br_forward.c */ 734 enum br_pkt_type { 735 BR_PKT_UNICAST, 736 BR_PKT_MULTICAST, 737 BR_PKT_BROADCAST 738 }; 739 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 740 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 741 bool local_rcv, bool local_orig); 742 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 743 void br_flood(struct net_bridge *br, struct sk_buff *skb, 744 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 745 746 /* return true if both source port and dest port are isolated */ 747 static inline bool br_skb_isolated(const struct net_bridge_port *to, 748 const struct sk_buff *skb) 749 { 750 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 751 (to->flags & BR_ISOLATED); 752 } 753 754 /* br_if.c */ 755 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 756 int br_add_bridge(struct net *net, const char *name); 757 int br_del_bridge(struct net *net, const char *name); 758 int br_add_if(struct net_bridge *br, struct net_device *dev, 759 struct netlink_ext_ack *extack); 760 int br_del_if(struct net_bridge *br, struct net_device *dev); 761 void br_mtu_auto_adjust(struct net_bridge *br); 762 netdev_features_t br_features_recompute(struct net_bridge *br, 763 netdev_features_t features); 764 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 765 void br_manage_promisc(struct net_bridge *br); 766 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 767 768 /* br_input.c */ 769 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 770 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 771 772 struct br_frame_type { 773 __be16 type; 774 int (*frame_handler)(struct net_bridge_port *port, 775 struct sk_buff *skb); 776 struct hlist_node list; 777 }; 778 779 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 780 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 781 782 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 783 { 784 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 785 } 786 787 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 788 { 789 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 790 } 791 792 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 793 { 794 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 795 } 796 797 static inline struct net_bridge_port * 798 br_port_get_check_rtnl(const struct net_device *dev) 799 { 800 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 801 } 802 803 /* br_ioctl.c */ 804 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 805 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 806 void __user *arg); 807 808 /* br_multicast.c */ 809 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 810 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, 811 struct sk_buff *skb, u16 vid); 812 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 813 struct sk_buff *skb, u16 vid); 814 int br_multicast_add_port(struct net_bridge_port *port); 815 void br_multicast_del_port(struct net_bridge_port *port); 816 void br_multicast_enable_port(struct net_bridge_port *port); 817 void br_multicast_disable_port(struct net_bridge_port *port); 818 void br_multicast_init(struct net_bridge *br); 819 void br_multicast_join_snoopers(struct net_bridge *br); 820 void br_multicast_leave_snoopers(struct net_bridge *br); 821 void br_multicast_open(struct net_bridge *br); 822 void br_multicast_stop(struct net_bridge *br); 823 void br_multicast_dev_del(struct net_bridge *br); 824 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 825 struct sk_buff *skb, bool local_rcv, bool local_orig); 826 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 827 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 828 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 829 struct netlink_ext_ack *extack); 830 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 831 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 832 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 833 #if IS_ENABLED(CONFIG_IPV6) 834 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 835 #endif 836 struct net_bridge_mdb_entry * 837 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 838 struct net_bridge_mdb_entry * 839 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 840 struct net_bridge_port_group * 841 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 842 struct net_bridge_port_group __rcu *next, 843 unsigned char flags, const unsigned char *src, 844 u8 filter_mode, u8 rt_protocol); 845 int br_mdb_hash_init(struct net_bridge *br); 846 void br_mdb_hash_fini(struct net_bridge *br); 847 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 848 struct net_bridge_port_group *pg, int type); 849 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port, 850 int type); 851 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 852 struct net_bridge_port_group *pg, 853 struct net_bridge_port_group __rcu **pp); 854 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p, 855 const struct sk_buff *skb, u8 type, u8 dir); 856 int br_multicast_init_stats(struct net_bridge *br); 857 void br_multicast_uninit_stats(struct net_bridge *br); 858 void br_multicast_get_stats(const struct net_bridge *br, 859 const struct net_bridge_port *p, 860 struct br_mcast_stats *dest); 861 void br_mdb_init(void); 862 void br_mdb_uninit(void); 863 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify); 864 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 865 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 866 u8 filter_mode); 867 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 868 struct net_bridge_port_group *sg); 869 struct net_bridge_group_src * 870 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 871 void br_multicast_del_group_src(struct net_bridge_group_src *src, 872 bool fastleave); 873 874 static inline bool br_group_is_l2(const struct br_ip *group) 875 { 876 return group->proto == 0; 877 } 878 879 #define mlock_dereference(X, br) \ 880 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 881 882 static inline struct hlist_node * 883 br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) { 884 #if IS_ENABLED(CONFIG_IPV6) 885 if (skb->protocol == htons(ETH_P_IPV6)) 886 return rcu_dereference(hlist_first_rcu(&b->ip6_mc_router_list)); 887 #endif 888 return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list)); 889 } 890 891 static inline struct net_bridge_port * 892 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) { 893 struct net_bridge_mcast_port *mctx; 894 895 #if IS_ENABLED(CONFIG_IPV6) 896 if (skb->protocol == htons(ETH_P_IPV6)) 897 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 898 ip6_rlist); 899 else 900 #endif 901 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 902 ip4_rlist); 903 904 if (mctx) 905 return mctx->port; 906 else 907 return NULL; 908 } 909 910 static inline bool br_ip4_multicast_is_router(struct net_bridge *br) 911 { 912 return timer_pending(&br->ip4_mc_router_timer); 913 } 914 915 static inline bool br_ip6_multicast_is_router(struct net_bridge *br) 916 { 917 #if IS_ENABLED(CONFIG_IPV6) 918 return timer_pending(&br->ip6_mc_router_timer); 919 #else 920 return false; 921 #endif 922 } 923 924 static inline bool 925 br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) 926 { 927 switch (br->multicast_router) { 928 case MDB_RTR_TYPE_PERM: 929 return true; 930 case MDB_RTR_TYPE_TEMP_QUERY: 931 if (skb) { 932 if (skb->protocol == htons(ETH_P_IP)) 933 return br_ip4_multicast_is_router(br); 934 else if (skb->protocol == htons(ETH_P_IPV6)) 935 return br_ip6_multicast_is_router(br); 936 } else { 937 return br_ip4_multicast_is_router(br) || 938 br_ip6_multicast_is_router(br); 939 } 940 fallthrough; 941 default: 942 return false; 943 } 944 } 945 946 static inline bool 947 __br_multicast_querier_exists(struct net_bridge *br, 948 struct bridge_mcast_other_query *querier, 949 const bool is_ipv6) 950 { 951 bool own_querier_enabled; 952 953 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) { 954 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR)) 955 own_querier_enabled = false; 956 else 957 own_querier_enabled = true; 958 } else { 959 own_querier_enabled = false; 960 } 961 962 return time_is_before_jiffies(querier->delay_time) && 963 (own_querier_enabled || timer_pending(&querier->timer)); 964 } 965 966 static inline bool br_multicast_querier_exists(struct net_bridge *br, 967 struct ethhdr *eth, 968 const struct net_bridge_mdb_entry *mdb) 969 { 970 switch (eth->h_proto) { 971 case (htons(ETH_P_IP)): 972 return __br_multicast_querier_exists(br, 973 &br->ip4_other_query, false); 974 #if IS_ENABLED(CONFIG_IPV6) 975 case (htons(ETH_P_IPV6)): 976 return __br_multicast_querier_exists(br, 977 &br->ip6_other_query, true); 978 #endif 979 default: 980 return !!mdb && br_group_is_l2(&mdb->addr); 981 } 982 } 983 984 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 985 { 986 switch (ip->proto) { 987 case htons(ETH_P_IP): 988 return ipv4_is_zeronet(ip->src.ip4); 989 #if IS_ENABLED(CONFIG_IPV6) 990 case htons(ETH_P_IPV6): 991 return ipv6_addr_any(&ip->src.ip6); 992 #endif 993 default: 994 return false; 995 } 996 } 997 998 static inline bool br_multicast_should_handle_mode(const struct net_bridge *br, 999 __be16 proto) 1000 { 1001 switch (proto) { 1002 case htons(ETH_P_IP): 1003 return !!(br->multicast_igmp_version == 3); 1004 #if IS_ENABLED(CONFIG_IPV6) 1005 case htons(ETH_P_IPV6): 1006 return !!(br->multicast_mld_version == 2); 1007 #endif 1008 default: 1009 return false; 1010 } 1011 } 1012 1013 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1014 { 1015 return BR_INPUT_SKB_CB(skb)->igmp; 1016 } 1017 1018 static inline unsigned long br_multicast_lmqt(const struct net_bridge *br) 1019 { 1020 return br->multicast_last_member_interval * 1021 br->multicast_last_member_count; 1022 } 1023 1024 static inline unsigned long br_multicast_gmi(const struct net_bridge *br) 1025 { 1026 /* use the RFC default of 2 for QRV */ 1027 return 2 * br->multicast_query_interval + 1028 br->multicast_query_response_interval; 1029 } 1030 #else 1031 static inline int br_multicast_rcv(struct net_bridge *br, 1032 struct net_bridge_port *port, 1033 struct sk_buff *skb, 1034 u16 vid) 1035 { 1036 return 0; 1037 } 1038 1039 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br, 1040 struct sk_buff *skb, u16 vid) 1041 { 1042 return NULL; 1043 } 1044 1045 static inline int br_multicast_add_port(struct net_bridge_port *port) 1046 { 1047 return 0; 1048 } 1049 1050 static inline void br_multicast_del_port(struct net_bridge_port *port) 1051 { 1052 } 1053 1054 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1055 { 1056 } 1057 1058 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1059 { 1060 } 1061 1062 static inline void br_multicast_init(struct net_bridge *br) 1063 { 1064 } 1065 1066 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1067 { 1068 } 1069 1070 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1071 { 1072 } 1073 1074 static inline void br_multicast_open(struct net_bridge *br) 1075 { 1076 } 1077 1078 static inline void br_multicast_stop(struct net_bridge *br) 1079 { 1080 } 1081 1082 static inline void br_multicast_dev_del(struct net_bridge *br) 1083 { 1084 } 1085 1086 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1087 struct sk_buff *skb, 1088 bool local_rcv, bool local_orig) 1089 { 1090 } 1091 1092 static inline bool br_multicast_is_router(struct net_bridge *br, 1093 struct sk_buff *skb) 1094 { 1095 return false; 1096 } 1097 1098 static inline bool br_multicast_querier_exists(struct net_bridge *br, 1099 struct ethhdr *eth, 1100 const struct net_bridge_mdb_entry *mdb) 1101 { 1102 return false; 1103 } 1104 1105 static inline void br_mdb_init(void) 1106 { 1107 } 1108 1109 static inline void br_mdb_uninit(void) 1110 { 1111 } 1112 1113 static inline int br_mdb_hash_init(struct net_bridge *br) 1114 { 1115 return 0; 1116 } 1117 1118 static inline void br_mdb_hash_fini(struct net_bridge *br) 1119 { 1120 } 1121 1122 static inline void br_multicast_count(struct net_bridge *br, 1123 const struct net_bridge_port *p, 1124 const struct sk_buff *skb, 1125 u8 type, u8 dir) 1126 { 1127 } 1128 1129 static inline int br_multicast_init_stats(struct net_bridge *br) 1130 { 1131 return 0; 1132 } 1133 1134 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1135 { 1136 } 1137 1138 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1139 { 1140 return 0; 1141 } 1142 #endif 1143 1144 /* br_vlan.c */ 1145 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1146 bool br_allowed_ingress(const struct net_bridge *br, 1147 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1148 u16 *vid, u8 *state); 1149 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1150 const struct sk_buff *skb); 1151 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1152 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1153 const struct net_bridge_port *port, 1154 struct net_bridge_vlan_group *vg, 1155 struct sk_buff *skb); 1156 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1157 bool *changed, struct netlink_ext_ack *extack); 1158 int br_vlan_delete(struct net_bridge *br, u16 vid); 1159 void br_vlan_flush(struct net_bridge *br); 1160 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1161 void br_recalculate_fwd_mask(struct net_bridge *br); 1162 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1163 struct netlink_ext_ack *extack); 1164 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1165 struct netlink_ext_ack *extack); 1166 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1167 struct netlink_ext_ack *extack); 1168 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1169 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1170 int br_vlan_init(struct net_bridge *br); 1171 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1172 struct netlink_ext_ack *extack); 1173 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1174 struct netlink_ext_ack *extack); 1175 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1176 bool *changed, struct netlink_ext_ack *extack); 1177 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1178 void nbp_vlan_flush(struct net_bridge_port *port); 1179 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1180 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1181 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1182 struct pcpu_sw_netstats *stats); 1183 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1184 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1185 void *ptr); 1186 void br_vlan_rtnl_init(void); 1187 void br_vlan_rtnl_uninit(void); 1188 void br_vlan_notify(const struct net_bridge *br, 1189 const struct net_bridge_port *p, 1190 u16 vid, u16 vid_range, 1191 int cmd); 1192 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1193 const struct net_bridge_vlan *range_end); 1194 1195 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1196 struct net_device_path_ctx *ctx, 1197 struct net_device_path *path); 1198 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1199 struct net_bridge_port *dst, 1200 struct net_device_path *path); 1201 1202 static inline struct net_bridge_vlan_group *br_vlan_group( 1203 const struct net_bridge *br) 1204 { 1205 return rtnl_dereference(br->vlgrp); 1206 } 1207 1208 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1209 const struct net_bridge_port *p) 1210 { 1211 return rtnl_dereference(p->vlgrp); 1212 } 1213 1214 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1215 const struct net_bridge *br) 1216 { 1217 return rcu_dereference(br->vlgrp); 1218 } 1219 1220 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1221 const struct net_bridge_port *p) 1222 { 1223 return rcu_dereference(p->vlgrp); 1224 } 1225 1226 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1227 * skb, the vlan tag will always be present if the frame was tagged. 1228 */ 1229 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1230 { 1231 int err = 0; 1232 1233 if (skb_vlan_tag_present(skb)) { 1234 *vid = skb_vlan_tag_get_id(skb); 1235 } else { 1236 *vid = 0; 1237 err = -EINVAL; 1238 } 1239 1240 return err; 1241 } 1242 1243 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1244 { 1245 if (!vg) 1246 return 0; 1247 1248 smp_rmb(); 1249 return vg->pvid; 1250 } 1251 1252 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1253 { 1254 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1255 } 1256 #else 1257 static inline bool br_allowed_ingress(const struct net_bridge *br, 1258 struct net_bridge_vlan_group *vg, 1259 struct sk_buff *skb, 1260 u16 *vid, u8 *state) 1261 { 1262 return true; 1263 } 1264 1265 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1266 const struct sk_buff *skb) 1267 { 1268 return true; 1269 } 1270 1271 static inline bool br_should_learn(struct net_bridge_port *p, 1272 struct sk_buff *skb, u16 *vid) 1273 { 1274 return true; 1275 } 1276 1277 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1278 const struct net_bridge_port *port, 1279 struct net_bridge_vlan_group *vg, 1280 struct sk_buff *skb) 1281 { 1282 return skb; 1283 } 1284 1285 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1286 bool *changed, struct netlink_ext_ack *extack) 1287 { 1288 *changed = false; 1289 return -EOPNOTSUPP; 1290 } 1291 1292 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1293 { 1294 return -EOPNOTSUPP; 1295 } 1296 1297 static inline void br_vlan_flush(struct net_bridge *br) 1298 { 1299 } 1300 1301 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1302 { 1303 } 1304 1305 static inline int br_vlan_init(struct net_bridge *br) 1306 { 1307 return 0; 1308 } 1309 1310 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1311 bool *changed, struct netlink_ext_ack *extack) 1312 { 1313 *changed = false; 1314 return -EOPNOTSUPP; 1315 } 1316 1317 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1318 { 1319 return -EOPNOTSUPP; 1320 } 1321 1322 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1323 { 1324 } 1325 1326 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1327 u16 vid) 1328 { 1329 return NULL; 1330 } 1331 1332 static inline int nbp_vlan_init(struct net_bridge_port *port, 1333 struct netlink_ext_ack *extack) 1334 { 1335 return 0; 1336 } 1337 1338 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1339 { 1340 return 0; 1341 } 1342 1343 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1344 { 1345 return 0; 1346 } 1347 1348 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1349 unsigned long val, 1350 struct netlink_ext_ack *extack) 1351 { 1352 return -EOPNOTSUPP; 1353 } 1354 1355 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1356 u32 filter_mask) 1357 { 1358 return 0; 1359 } 1360 1361 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1362 struct net_device_path_ctx *ctx, 1363 struct net_device_path *path) 1364 { 1365 } 1366 1367 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1368 struct net_bridge_port *dst, 1369 struct net_device_path *path) 1370 { 1371 return 0; 1372 } 1373 1374 static inline struct net_bridge_vlan_group *br_vlan_group( 1375 const struct net_bridge *br) 1376 { 1377 return NULL; 1378 } 1379 1380 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1381 const struct net_bridge_port *p) 1382 { 1383 return NULL; 1384 } 1385 1386 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1387 const struct net_bridge *br) 1388 { 1389 return NULL; 1390 } 1391 1392 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1393 const struct net_bridge_port *p) 1394 { 1395 return NULL; 1396 } 1397 1398 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1399 struct pcpu_sw_netstats *stats) 1400 { 1401 } 1402 1403 static inline void br_vlan_port_event(struct net_bridge_port *p, 1404 unsigned long event) 1405 { 1406 } 1407 1408 static inline int br_vlan_bridge_event(struct net_device *dev, 1409 unsigned long event, void *ptr) 1410 { 1411 return 0; 1412 } 1413 1414 static inline void br_vlan_rtnl_init(void) 1415 { 1416 } 1417 1418 static inline void br_vlan_rtnl_uninit(void) 1419 { 1420 } 1421 1422 static inline void br_vlan_notify(const struct net_bridge *br, 1423 const struct net_bridge_port *p, 1424 u16 vid, u16 vid_range, 1425 int cmd) 1426 { 1427 } 1428 1429 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1430 const struct net_bridge_vlan *range_end) 1431 { 1432 return true; 1433 } 1434 #endif 1435 1436 /* br_vlan_options.c */ 1437 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1438 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1439 const struct net_bridge_vlan *range_end); 1440 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1441 size_t br_vlan_opts_nl_size(void); 1442 int br_vlan_process_options(const struct net_bridge *br, 1443 const struct net_bridge_port *p, 1444 struct net_bridge_vlan *range_start, 1445 struct net_bridge_vlan *range_end, 1446 struct nlattr **tb, 1447 struct netlink_ext_ack *extack); 1448 1449 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1450 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1451 { 1452 return READ_ONCE(v->state); 1453 } 1454 1455 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1456 { 1457 WRITE_ONCE(v->state, state); 1458 } 1459 1460 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1461 { 1462 return READ_ONCE(vg->pvid_state); 1463 } 1464 1465 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1466 u8 state) 1467 { 1468 WRITE_ONCE(vg->pvid_state, state); 1469 } 1470 1471 /* learn_allow is true at ingress and false at egress */ 1472 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1473 { 1474 switch (state) { 1475 case BR_STATE_LEARNING: 1476 return learn_allow; 1477 case BR_STATE_FORWARDING: 1478 return true; 1479 default: 1480 return false; 1481 } 1482 } 1483 #endif 1484 1485 struct nf_br_ops { 1486 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1487 }; 1488 extern const struct nf_br_ops __rcu *nf_br_ops; 1489 1490 /* br_netfilter.c */ 1491 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1492 int br_nf_core_init(void); 1493 void br_nf_core_fini(void); 1494 void br_netfilter_rtable_init(struct net_bridge *); 1495 #else 1496 static inline int br_nf_core_init(void) { return 0; } 1497 static inline void br_nf_core_fini(void) {} 1498 #define br_netfilter_rtable_init(x) 1499 #endif 1500 1501 /* br_stp.c */ 1502 void br_set_state(struct net_bridge_port *p, unsigned int state); 1503 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1504 void br_init_port(struct net_bridge_port *p); 1505 void br_become_designated_port(struct net_bridge_port *p); 1506 1507 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1508 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1509 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1510 int br_set_max_age(struct net_bridge *br, unsigned long x); 1511 int __set_ageing_time(struct net_device *dev, unsigned long t); 1512 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1513 1514 1515 /* br_stp_if.c */ 1516 void br_stp_enable_bridge(struct net_bridge *br); 1517 void br_stp_disable_bridge(struct net_bridge *br); 1518 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1519 struct netlink_ext_ack *extack); 1520 void br_stp_enable_port(struct net_bridge_port *p); 1521 void br_stp_disable_port(struct net_bridge_port *p); 1522 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1523 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1524 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1525 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1526 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1527 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1528 1529 /* br_stp_bpdu.c */ 1530 struct stp_proto; 1531 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1532 struct net_device *dev); 1533 1534 /* br_stp_timer.c */ 1535 void br_stp_timer_init(struct net_bridge *br); 1536 void br_stp_port_timer_init(struct net_bridge_port *p); 1537 unsigned long br_timer_value(const struct timer_list *timer); 1538 1539 /* br.c */ 1540 #if IS_ENABLED(CONFIG_ATM_LANE) 1541 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1542 #endif 1543 1544 /* br_mrp.c */ 1545 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1546 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1547 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1548 bool br_mrp_enabled(struct net_bridge *br); 1549 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1550 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1551 #else 1552 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1553 struct nlattr *attr, int cmd, 1554 struct netlink_ext_ack *extack) 1555 { 1556 return -EOPNOTSUPP; 1557 } 1558 1559 static inline bool br_mrp_enabled(struct net_bridge *br) 1560 { 1561 return false; 1562 } 1563 1564 static inline void br_mrp_port_del(struct net_bridge *br, 1565 struct net_bridge_port *p) 1566 { 1567 } 1568 1569 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1570 { 1571 return 0; 1572 } 1573 1574 #endif 1575 1576 /* br_cfm.c */ 1577 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1578 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1579 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1580 bool br_cfm_created(struct net_bridge *br); 1581 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1582 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1583 int br_cfm_status_fill_info(struct sk_buff *skb, 1584 struct net_bridge *br, 1585 bool getlink); 1586 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1587 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1588 #else 1589 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1590 struct nlattr *attr, int cmd, 1591 struct netlink_ext_ack *extack) 1592 { 1593 return -EOPNOTSUPP; 1594 } 1595 1596 static inline bool br_cfm_created(struct net_bridge *br) 1597 { 1598 return false; 1599 } 1600 1601 static inline void br_cfm_port_del(struct net_bridge *br, 1602 struct net_bridge_port *p) 1603 { 1604 } 1605 1606 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1607 { 1608 return -EOPNOTSUPP; 1609 } 1610 1611 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1612 struct net_bridge *br, 1613 bool getlink) 1614 { 1615 return -EOPNOTSUPP; 1616 } 1617 1618 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1619 { 1620 return -EOPNOTSUPP; 1621 } 1622 1623 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1624 { 1625 return -EOPNOTSUPP; 1626 } 1627 #endif 1628 1629 /* br_netlink.c */ 1630 extern struct rtnl_link_ops br_link_ops; 1631 int br_netlink_init(void); 1632 void br_netlink_fini(void); 1633 void br_ifinfo_notify(int event, const struct net_bridge *br, 1634 const struct net_bridge_port *port); 1635 void br_info_notify(int event, const struct net_bridge *br, 1636 const struct net_bridge_port *port, u32 filter); 1637 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1638 struct netlink_ext_ack *extack); 1639 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1640 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1641 u32 filter_mask, int nlflags); 1642 int br_process_vlan_info(struct net_bridge *br, 1643 struct net_bridge_port *p, int cmd, 1644 struct bridge_vlan_info *vinfo_curr, 1645 struct bridge_vlan_info **vinfo_last, 1646 bool *changed, 1647 struct netlink_ext_ack *extack); 1648 1649 #ifdef CONFIG_SYSFS 1650 /* br_sysfs_if.c */ 1651 extern const struct sysfs_ops brport_sysfs_ops; 1652 int br_sysfs_addif(struct net_bridge_port *p); 1653 int br_sysfs_renameif(struct net_bridge_port *p); 1654 1655 /* br_sysfs_br.c */ 1656 int br_sysfs_addbr(struct net_device *dev); 1657 void br_sysfs_delbr(struct net_device *dev); 1658 1659 #else 1660 1661 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1662 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1663 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1664 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1665 #endif /* CONFIG_SYSFS */ 1666 1667 /* br_switchdev.c */ 1668 #ifdef CONFIG_NET_SWITCHDEV 1669 int nbp_switchdev_mark_set(struct net_bridge_port *p); 1670 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1671 struct sk_buff *skb); 1672 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1673 const struct sk_buff *skb); 1674 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1675 unsigned long flags, 1676 unsigned long mask, 1677 struct netlink_ext_ack *extack); 1678 void br_switchdev_fdb_notify(struct net_bridge *br, 1679 const struct net_bridge_fdb_entry *fdb, int type); 1680 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1681 struct netlink_ext_ack *extack); 1682 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1683 1684 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1685 { 1686 skb->offload_fwd_mark = 0; 1687 } 1688 #else 1689 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p) 1690 { 1691 return 0; 1692 } 1693 1694 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1695 struct sk_buff *skb) 1696 { 1697 } 1698 1699 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1700 const struct sk_buff *skb) 1701 { 1702 return true; 1703 } 1704 1705 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1706 unsigned long flags, 1707 unsigned long mask, 1708 struct netlink_ext_ack *extack) 1709 { 1710 return 0; 1711 } 1712 1713 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1714 u16 vid, u16 flags, 1715 struct netlink_ext_ack *extack) 1716 { 1717 return -EOPNOTSUPP; 1718 } 1719 1720 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1721 { 1722 return -EOPNOTSUPP; 1723 } 1724 1725 static inline void 1726 br_switchdev_fdb_notify(struct net_bridge *br, 1727 const struct net_bridge_fdb_entry *fdb, int type) 1728 { 1729 } 1730 1731 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1732 { 1733 } 1734 #endif /* CONFIG_NET_SWITCHDEV */ 1735 1736 /* br_arp_nd_proxy.c */ 1737 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1738 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1739 u16 vid, struct net_bridge_port *p); 1740 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1741 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1742 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1743 #endif 1744