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