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