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_HWDOM_MAX BITS_PER_LONG 33 34 #define BR_VERSION "2.3" 35 36 /* Control of forwarding link local multicast */ 37 #define BR_GROUPFWD_DEFAULT 0 38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 39 enum { 40 BR_GROUPFWD_STP = BIT(0), 41 BR_GROUPFWD_MACPAUSE = BIT(1), 42 BR_GROUPFWD_LACP = BIT(2), 43 }; 44 45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 46 BR_GROUPFWD_LACP) 47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 48 #define BR_GROUPFWD_8021AD 0xB801u 49 50 /* Path to usermode spanning tree program */ 51 #define BR_STP_PROG "/sbin/bridge-stp" 52 53 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 54 55 typedef struct bridge_id bridge_id; 56 typedef struct mac_addr mac_addr; 57 typedef __u16 port_id; 58 59 struct bridge_id { 60 unsigned char prio[2]; 61 unsigned char addr[ETH_ALEN]; 62 }; 63 64 struct mac_addr { 65 unsigned char addr[ETH_ALEN]; 66 }; 67 68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 69 /* our own querier */ 70 struct bridge_mcast_own_query { 71 struct timer_list timer; 72 u32 startup_sent; 73 }; 74 75 /* other querier */ 76 struct bridge_mcast_other_query { 77 struct timer_list timer; 78 unsigned long delay_time; 79 }; 80 81 /* selected querier */ 82 struct bridge_mcast_querier { 83 struct br_ip addr; 84 struct net_bridge_port __rcu *port; 85 }; 86 87 /* IGMP/MLD statistics */ 88 struct bridge_mcast_stats { 89 struct br_mcast_stats mstats; 90 struct u64_stats_sync syncp; 91 }; 92 #endif 93 94 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 95 struct net_bridge_mcast_port { 96 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 97 struct net_bridge_port *port; 98 struct net_bridge_vlan *vlan; 99 100 struct bridge_mcast_own_query ip4_own_query; 101 struct timer_list ip4_mc_router_timer; 102 struct hlist_node ip4_rlist; 103 #if IS_ENABLED(CONFIG_IPV6) 104 struct bridge_mcast_own_query ip6_own_query; 105 struct timer_list ip6_mc_router_timer; 106 struct hlist_node ip6_rlist; 107 #endif /* IS_ENABLED(CONFIG_IPV6) */ 108 unsigned char multicast_router; 109 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 110 }; 111 112 /* net_bridge_mcast must be always defined due to forwarding stubs */ 113 struct net_bridge_mcast { 114 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 115 struct net_bridge *br; 116 struct net_bridge_vlan *vlan; 117 118 u32 multicast_last_member_count; 119 u32 multicast_startup_query_count; 120 121 u8 multicast_igmp_version; 122 u8 multicast_router; 123 #if IS_ENABLED(CONFIG_IPV6) 124 u8 multicast_mld_version; 125 #endif 126 unsigned long multicast_last_member_interval; 127 unsigned long multicast_membership_interval; 128 unsigned long multicast_querier_interval; 129 unsigned long multicast_query_interval; 130 unsigned long multicast_query_response_interval; 131 unsigned long multicast_startup_query_interval; 132 struct hlist_head ip4_mc_router_list; 133 struct timer_list ip4_mc_router_timer; 134 struct bridge_mcast_other_query ip4_other_query; 135 struct bridge_mcast_own_query ip4_own_query; 136 struct bridge_mcast_querier ip4_querier; 137 #if IS_ENABLED(CONFIG_IPV6) 138 struct hlist_head ip6_mc_router_list; 139 struct timer_list ip6_mc_router_timer; 140 struct bridge_mcast_other_query ip6_other_query; 141 struct bridge_mcast_own_query ip6_own_query; 142 struct bridge_mcast_querier ip6_querier; 143 #endif /* IS_ENABLED(CONFIG_IPV6) */ 144 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 145 }; 146 147 struct br_tunnel_info { 148 __be64 tunnel_id; 149 struct metadata_dst __rcu *tunnel_dst; 150 }; 151 152 /* private vlan flags */ 153 enum { 154 BR_VLFLAG_PER_PORT_STATS = BIT(0), 155 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 156 BR_VLFLAG_MCAST_ENABLED = BIT(2), 157 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 158 }; 159 160 /** 161 * struct net_bridge_vlan - per-vlan entry 162 * 163 * @vnode: rhashtable member 164 * @vid: VLAN id 165 * @flags: bridge vlan flags 166 * @priv_flags: private (in-kernel) bridge vlan flags 167 * @state: STP state (e.g. blocking, learning, forwarding) 168 * @stats: per-cpu VLAN statistics 169 * @br: if MASTER flag set, this points to a bridge struct 170 * @port: if MASTER flag unset, this points to a port struct 171 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 172 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 173 * for this VLAN entry 174 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 175 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 176 * context 177 * @vlist: sorted list of VLAN entries 178 * @rcu: used for entry destruction 179 * 180 * This structure is shared between the global per-VLAN entries contained in 181 * the bridge rhashtable and the local per-port per-VLAN entries contained in 182 * the port's rhashtable. The union entries should be interpreted depending on 183 * the entry flags that are set. 184 */ 185 struct net_bridge_vlan { 186 struct rhash_head vnode; 187 struct rhash_head tnode; 188 u16 vid; 189 u16 flags; 190 u16 priv_flags; 191 u8 state; 192 struct pcpu_sw_netstats __percpu *stats; 193 union { 194 struct net_bridge *br; 195 struct net_bridge_port *port; 196 }; 197 union { 198 refcount_t refcnt; 199 struct net_bridge_vlan *brvlan; 200 }; 201 202 struct br_tunnel_info tinfo; 203 204 union { 205 struct net_bridge_mcast br_mcast_ctx; 206 struct net_bridge_mcast_port port_mcast_ctx; 207 }; 208 209 struct list_head vlist; 210 211 struct rcu_head rcu; 212 }; 213 214 /** 215 * struct net_bridge_vlan_group 216 * 217 * @vlan_hash: VLAN entry rhashtable 218 * @vlan_list: sorted VLAN entry list 219 * @num_vlans: number of total VLAN entries 220 * @pvid: PVID VLAN id 221 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 222 * 223 * IMPORTANT: Be careful when checking if there're VLAN entries using list 224 * primitives because the bridge can have entries in its list which 225 * are just for global context but not for filtering, i.e. they have 226 * the master flag set but not the brentry flag. If you have to check 227 * if there're "real" entries in the bridge please test @num_vlans 228 */ 229 struct net_bridge_vlan_group { 230 struct rhashtable vlan_hash; 231 struct rhashtable tunnel_hash; 232 struct list_head vlan_list; 233 u16 num_vlans; 234 u16 pvid; 235 u8 pvid_state; 236 }; 237 238 /* bridge fdb flags */ 239 enum { 240 BR_FDB_LOCAL, 241 BR_FDB_STATIC, 242 BR_FDB_STICKY, 243 BR_FDB_ADDED_BY_USER, 244 BR_FDB_ADDED_BY_EXT_LEARN, 245 BR_FDB_OFFLOADED, 246 BR_FDB_NOTIFY, 247 BR_FDB_NOTIFY_INACTIVE 248 }; 249 250 struct net_bridge_fdb_key { 251 mac_addr addr; 252 u16 vlan_id; 253 }; 254 255 struct net_bridge_fdb_entry { 256 struct rhash_head rhnode; 257 struct net_bridge_port *dst; 258 259 struct net_bridge_fdb_key key; 260 struct hlist_node fdb_node; 261 unsigned long flags; 262 263 /* write-heavy members should not affect lookups */ 264 unsigned long updated ____cacheline_aligned_in_smp; 265 unsigned long used; 266 267 struct rcu_head rcu; 268 }; 269 270 #define MDB_PG_FLAGS_PERMANENT BIT(0) 271 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 272 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 273 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 274 #define MDB_PG_FLAGS_BLOCKED BIT(4) 275 276 #define PG_SRC_ENT_LIMIT 32 277 278 #define BR_SGRP_F_DELETE BIT(0) 279 #define BR_SGRP_F_SEND BIT(1) 280 #define BR_SGRP_F_INSTALLED BIT(2) 281 282 struct net_bridge_mcast_gc { 283 struct hlist_node gc_node; 284 void (*destroy)(struct net_bridge_mcast_gc *gc); 285 }; 286 287 struct net_bridge_group_src { 288 struct hlist_node node; 289 290 struct br_ip addr; 291 struct net_bridge_port_group *pg; 292 u8 flags; 293 u8 src_query_rexmit_cnt; 294 struct timer_list timer; 295 296 struct net_bridge *br; 297 struct net_bridge_mcast_gc mcast_gc; 298 struct rcu_head rcu; 299 }; 300 301 struct net_bridge_port_group_sg_key { 302 struct net_bridge_port *port; 303 struct br_ip addr; 304 }; 305 306 struct net_bridge_port_group { 307 struct net_bridge_port_group __rcu *next; 308 struct net_bridge_port_group_sg_key key; 309 unsigned char eth_addr[ETH_ALEN] __aligned(2); 310 unsigned char flags; 311 unsigned char filter_mode; 312 unsigned char grp_query_rexmit_cnt; 313 unsigned char rt_protocol; 314 315 struct hlist_head src_list; 316 unsigned int src_ents; 317 struct timer_list timer; 318 struct timer_list rexmit_timer; 319 struct hlist_node mglist; 320 struct rb_root eht_set_tree; 321 struct rb_root eht_host_tree; 322 323 struct rhash_head rhnode; 324 struct net_bridge_mcast_gc mcast_gc; 325 struct rcu_head rcu; 326 }; 327 328 struct net_bridge_mdb_entry { 329 struct rhash_head rhnode; 330 struct net_bridge *br; 331 struct net_bridge_port_group __rcu *ports; 332 struct br_ip addr; 333 bool host_joined; 334 335 struct timer_list timer; 336 struct hlist_node mdb_node; 337 338 struct net_bridge_mcast_gc mcast_gc; 339 struct rcu_head rcu; 340 }; 341 342 struct net_bridge_port { 343 struct net_bridge *br; 344 struct net_device *dev; 345 struct list_head list; 346 347 unsigned long flags; 348 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 349 struct net_bridge_vlan_group __rcu *vlgrp; 350 #endif 351 struct net_bridge_port __rcu *backup_port; 352 353 /* STP */ 354 u8 priority; 355 u8 state; 356 u16 port_no; 357 unsigned char topology_change_ack; 358 unsigned char config_pending; 359 port_id port_id; 360 port_id designated_port; 361 bridge_id designated_root; 362 bridge_id designated_bridge; 363 u32 path_cost; 364 u32 designated_cost; 365 unsigned long designated_age; 366 367 struct timer_list forward_delay_timer; 368 struct timer_list hold_timer; 369 struct timer_list message_age_timer; 370 struct kobject kobj; 371 struct rcu_head rcu; 372 373 struct net_bridge_mcast_port multicast_ctx; 374 375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 376 struct bridge_mcast_stats __percpu *mcast_stats; 377 378 u32 multicast_eht_hosts_limit; 379 u32 multicast_eht_hosts_cnt; 380 struct hlist_head mglist; 381 #endif 382 383 #ifdef CONFIG_SYSFS 384 char sysfs_name[IFNAMSIZ]; 385 #endif 386 387 #ifdef CONFIG_NET_POLL_CONTROLLER 388 struct netpoll *np; 389 #endif 390 #ifdef CONFIG_NET_SWITCHDEV 391 /* Identifier used to group ports that share the same switchdev 392 * hardware domain. 393 */ 394 int hwdom; 395 int offload_count; 396 struct netdev_phys_item_id ppid; 397 #endif 398 u16 group_fwd_mask; 399 u16 backup_redirected_cnt; 400 401 struct bridge_stp_xstats stp_xstats; 402 }; 403 404 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 405 406 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 407 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 408 409 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 410 { 411 return rcu_dereference(dev->rx_handler_data); 412 } 413 414 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 415 { 416 return netif_is_bridge_port(dev) ? 417 rtnl_dereference(dev->rx_handler_data) : NULL; 418 } 419 420 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 421 { 422 return netif_is_bridge_port(dev) ? 423 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 424 } 425 426 enum net_bridge_opts { 427 BROPT_VLAN_ENABLED, 428 BROPT_VLAN_STATS_ENABLED, 429 BROPT_NF_CALL_IPTABLES, 430 BROPT_NF_CALL_IP6TABLES, 431 BROPT_NF_CALL_ARPTABLES, 432 BROPT_GROUP_ADDR_SET, 433 BROPT_MULTICAST_ENABLED, 434 BROPT_MULTICAST_QUERIER, 435 BROPT_MULTICAST_QUERY_USE_IFADDR, 436 BROPT_MULTICAST_STATS_ENABLED, 437 BROPT_HAS_IPV6_ADDR, 438 BROPT_NEIGH_SUPPRESS_ENABLED, 439 BROPT_MTU_SET_BY_USER, 440 BROPT_VLAN_STATS_PER_PORT, 441 BROPT_NO_LL_LEARN, 442 BROPT_VLAN_BRIDGE_BINDING, 443 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 444 }; 445 446 struct net_bridge { 447 spinlock_t lock; 448 spinlock_t hash_lock; 449 struct hlist_head frame_type_list; 450 struct net_device *dev; 451 unsigned long options; 452 /* These fields are accessed on each packet */ 453 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 454 __be16 vlan_proto; 455 u16 default_pvid; 456 struct net_bridge_vlan_group __rcu *vlgrp; 457 #endif 458 459 struct rhashtable fdb_hash_tbl; 460 struct list_head port_list; 461 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 462 union { 463 struct rtable fake_rtable; 464 struct rt6_info fake_rt6_info; 465 }; 466 #endif 467 u16 group_fwd_mask; 468 u16 group_fwd_mask_required; 469 470 /* STP */ 471 bridge_id designated_root; 472 bridge_id bridge_id; 473 unsigned char topology_change; 474 unsigned char topology_change_detected; 475 u16 root_port; 476 unsigned long max_age; 477 unsigned long hello_time; 478 unsigned long forward_delay; 479 unsigned long ageing_time; 480 unsigned long bridge_max_age; 481 unsigned long bridge_hello_time; 482 unsigned long bridge_forward_delay; 483 unsigned long bridge_ageing_time; 484 u32 root_path_cost; 485 486 u8 group_addr[ETH_ALEN]; 487 488 enum { 489 BR_NO_STP, /* no spanning tree */ 490 BR_KERNEL_STP, /* old STP in kernel */ 491 BR_USER_STP, /* new RSTP in userspace */ 492 } stp_enabled; 493 494 struct net_bridge_mcast multicast_ctx; 495 496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 497 struct bridge_mcast_stats __percpu *mcast_stats; 498 499 u32 hash_max; 500 501 spinlock_t multicast_lock; 502 503 struct rhashtable mdb_hash_tbl; 504 struct rhashtable sg_port_tbl; 505 506 struct hlist_head mcast_gc_list; 507 struct hlist_head mdb_list; 508 509 struct work_struct mcast_gc_work; 510 #endif 511 512 struct timer_list hello_timer; 513 struct timer_list tcn_timer; 514 struct timer_list topology_change_timer; 515 struct delayed_work gc_work; 516 struct kobject *ifobj; 517 u32 auto_cnt; 518 519 #ifdef CONFIG_NET_SWITCHDEV 520 /* Counter used to make sure that hardware domains get unique 521 * identifiers in case a bridge spans multiple switchdev instances. 522 */ 523 int last_hwdom; 524 /* Bit mask of hardware domain numbers in use */ 525 unsigned long busy_hwdoms; 526 #endif 527 struct hlist_head fdb_list; 528 529 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 530 struct hlist_head mrp_list; 531 #endif 532 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 533 struct hlist_head mep_list; 534 #endif 535 }; 536 537 struct br_input_skb_cb { 538 struct net_device *brdev; 539 540 u16 frag_max_size; 541 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 542 u8 igmp; 543 u8 mrouters_only:1; 544 #endif 545 u8 proxyarp_replied:1; 546 u8 src_port_isolated:1; 547 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 548 u8 vlan_filtered:1; 549 #endif 550 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 551 u8 br_netfilter_broute:1; 552 #endif 553 554 #ifdef CONFIG_NET_SWITCHDEV 555 /* Set if TX data plane offloading is used towards at least one 556 * hardware domain. 557 */ 558 u8 tx_fwd_offload:1; 559 /* The switchdev hardware domain from which this packet was received. 560 * If skb->offload_fwd_mark was set, then this packet was already 561 * forwarded by hardware to the other ports in the source hardware 562 * domain, otherwise it wasn't. 563 */ 564 int src_hwdom; 565 /* Bit mask of hardware domains towards this packet has already been 566 * transmitted using the TX data plane offload. 567 */ 568 unsigned long fwd_hwdoms; 569 #endif 570 }; 571 572 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 573 574 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 575 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 576 #else 577 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 578 #endif 579 580 #define br_printk(level, br, format, args...) \ 581 printk(level "%s: " format, (br)->dev->name, ##args) 582 583 #define br_err(__br, format, args...) \ 584 br_printk(KERN_ERR, __br, format, ##args) 585 #define br_warn(__br, format, args...) \ 586 br_printk(KERN_WARNING, __br, format, ##args) 587 #define br_notice(__br, format, args...) \ 588 br_printk(KERN_NOTICE, __br, format, ##args) 589 #define br_info(__br, format, args...) \ 590 br_printk(KERN_INFO, __br, format, ##args) 591 592 #define br_debug(br, format, args...) \ 593 pr_debug("%s: " format, (br)->dev->name, ##args) 594 595 /* called under bridge lock */ 596 static inline int br_is_root_bridge(const struct net_bridge *br) 597 { 598 return !memcmp(&br->bridge_id, &br->designated_root, 8); 599 } 600 601 /* check if a VLAN entry is global */ 602 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 603 { 604 return v->flags & BRIDGE_VLAN_INFO_MASTER; 605 } 606 607 /* check if a VLAN entry is used by the bridge */ 608 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 609 { 610 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 611 } 612 613 /* check if we should use the vlan entry, returns false if it's only context */ 614 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 615 { 616 if (br_vlan_is_master(v)) { 617 if (br_vlan_is_brentry(v)) 618 return true; 619 else 620 return false; 621 } 622 623 return true; 624 } 625 626 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 627 { 628 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 629 } 630 631 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 632 { 633 bool ret = vid > 0 && vid < VLAN_VID_MASK; 634 635 if (!ret) 636 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 637 638 return ret; 639 } 640 641 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 642 const struct bridge_vlan_info *last, 643 struct netlink_ext_ack *extack) 644 { 645 /* pvid flag is not allowed in ranges */ 646 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 647 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 648 return false; 649 } 650 651 /* when cur is the range end, check if: 652 * - it has range start flag 653 * - range ids are invalid (end is equal to or before start) 654 */ 655 if (last) { 656 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 657 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 658 return false; 659 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 660 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 661 return false; 662 } else if (cur->vid <= last->vid) { 663 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 664 return false; 665 } 666 } 667 668 /* check for required range flags */ 669 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 670 BRIDGE_VLAN_INFO_RANGE_END))) { 671 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 672 return false; 673 } 674 675 return true; 676 } 677 678 static inline int br_afspec_cmd_to_rtm(int cmd) 679 { 680 switch (cmd) { 681 case RTM_SETLINK: 682 return RTM_NEWVLAN; 683 case RTM_DELLINK: 684 return RTM_DELVLAN; 685 } 686 687 return 0; 688 } 689 690 static inline int br_opt_get(const struct net_bridge *br, 691 enum net_bridge_opts opt) 692 { 693 return test_bit(opt, &br->options); 694 } 695 696 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 697 struct netlink_ext_ack *extack); 698 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 699 int br_boolopt_multi_toggle(struct net_bridge *br, 700 struct br_boolopt_multi *bm, 701 struct netlink_ext_ack *extack); 702 void br_boolopt_multi_get(const struct net_bridge *br, 703 struct br_boolopt_multi *bm); 704 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 705 706 /* br_device.c */ 707 void br_dev_setup(struct net_device *dev); 708 void br_dev_delete(struct net_device *dev, struct list_head *list); 709 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 710 #ifdef CONFIG_NET_POLL_CONTROLLER 711 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 712 struct sk_buff *skb) 713 { 714 netpoll_send_skb(p->np, skb); 715 } 716 717 int br_netpoll_enable(struct net_bridge_port *p); 718 void br_netpoll_disable(struct net_bridge_port *p); 719 #else 720 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 721 struct sk_buff *skb) 722 { 723 } 724 725 static inline int br_netpoll_enable(struct net_bridge_port *p) 726 { 727 return 0; 728 } 729 730 static inline void br_netpoll_disable(struct net_bridge_port *p) 731 { 732 } 733 #endif 734 735 /* br_fdb.c */ 736 int br_fdb_init(void); 737 void br_fdb_fini(void); 738 int br_fdb_hash_init(struct net_bridge *br); 739 void br_fdb_hash_fini(struct net_bridge *br); 740 void br_fdb_flush(struct net_bridge *br); 741 void br_fdb_find_delete_local(struct net_bridge *br, 742 const struct net_bridge_port *p, 743 const unsigned char *addr, u16 vid); 744 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 745 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 746 void br_fdb_cleanup(struct work_struct *work); 747 void br_fdb_delete_by_port(struct net_bridge *br, 748 const struct net_bridge_port *p, u16 vid, int do_all); 749 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 750 const unsigned char *addr, 751 __u16 vid); 752 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 753 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 754 unsigned long off); 755 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 756 const unsigned char *addr, u16 vid); 757 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 758 const unsigned char *addr, u16 vid, unsigned long flags); 759 760 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 761 struct net_device *dev, const unsigned char *addr, u16 vid); 762 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 763 const unsigned char *addr, u16 vid, u16 nlh_flags, 764 struct netlink_ext_ack *extack); 765 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 766 struct net_device *dev, struct net_device *fdev, int *idx); 767 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 768 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 769 struct netlink_ext_ack *extack); 770 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 771 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 772 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 773 const unsigned char *addr, u16 vid, bool is_local, 774 bool swdev_notify); 775 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 776 const unsigned char *addr, u16 vid, 777 bool swdev_notify); 778 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 779 const unsigned char *addr, u16 vid, bool offloaded); 780 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding, 781 struct notifier_block *nb); 782 783 /* br_forward.c */ 784 enum br_pkt_type { 785 BR_PKT_UNICAST, 786 BR_PKT_MULTICAST, 787 BR_PKT_BROADCAST 788 }; 789 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 790 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 791 bool local_rcv, bool local_orig); 792 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 793 void br_flood(struct net_bridge *br, struct sk_buff *skb, 794 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 795 796 /* return true if both source port and dest port are isolated */ 797 static inline bool br_skb_isolated(const struct net_bridge_port *to, 798 const struct sk_buff *skb) 799 { 800 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 801 (to->flags & BR_ISOLATED); 802 } 803 804 /* br_if.c */ 805 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 806 int br_add_bridge(struct net *net, const char *name); 807 int br_del_bridge(struct net *net, const char *name); 808 int br_add_if(struct net_bridge *br, struct net_device *dev, 809 struct netlink_ext_ack *extack); 810 int br_del_if(struct net_bridge *br, struct net_device *dev); 811 void br_mtu_auto_adjust(struct net_bridge *br); 812 netdev_features_t br_features_recompute(struct net_bridge *br, 813 netdev_features_t features); 814 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 815 void br_manage_promisc(struct net_bridge *br); 816 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 817 818 /* br_input.c */ 819 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 820 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 821 822 struct br_frame_type { 823 __be16 type; 824 int (*frame_handler)(struct net_bridge_port *port, 825 struct sk_buff *skb); 826 struct hlist_node list; 827 }; 828 829 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 830 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 831 832 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 833 { 834 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 835 } 836 837 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 838 { 839 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 840 } 841 842 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 843 { 844 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 845 } 846 847 static inline struct net_bridge_port * 848 br_port_get_check_rtnl(const struct net_device *dev) 849 { 850 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 851 } 852 853 /* br_ioctl.c */ 854 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 855 void __user *data, int cmd); 856 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 857 struct ifreq *ifr, void __user *uarg); 858 859 /* br_multicast.c */ 860 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 861 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 862 struct net_bridge_mcast_port **pmctx, 863 struct net_bridge_vlan *vlan, 864 struct sk_buff *skb, u16 vid); 865 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 866 struct sk_buff *skb, u16 vid); 867 int br_multicast_add_port(struct net_bridge_port *port); 868 void br_multicast_del_port(struct net_bridge_port *port); 869 void br_multicast_enable_port(struct net_bridge_port *port); 870 void br_multicast_disable_port(struct net_bridge_port *port); 871 void br_multicast_init(struct net_bridge *br); 872 void br_multicast_join_snoopers(struct net_bridge *br); 873 void br_multicast_leave_snoopers(struct net_bridge *br); 874 void br_multicast_open(struct net_bridge *br); 875 void br_multicast_stop(struct net_bridge *br); 876 void br_multicast_dev_del(struct net_bridge *br); 877 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 878 struct net_bridge_mcast *brmctx, 879 bool local_rcv, bool local_orig); 880 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 881 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 882 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 883 struct netlink_ext_ack *extack); 884 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 885 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 886 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 887 unsigned long val); 888 #if IS_ENABLED(CONFIG_IPV6) 889 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 890 unsigned long val); 891 #endif 892 struct net_bridge_mdb_entry * 893 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 894 struct net_bridge_mdb_entry * 895 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 896 struct net_bridge_port_group * 897 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 898 struct net_bridge_port_group __rcu *next, 899 unsigned char flags, const unsigned char *src, 900 u8 filter_mode, u8 rt_protocol); 901 int br_mdb_hash_init(struct net_bridge *br); 902 void br_mdb_hash_fini(struct net_bridge *br); 903 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 904 struct net_bridge_port_group *pg, int type); 905 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 906 int type); 907 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 908 struct net_bridge_port_group *pg, 909 struct net_bridge_port_group __rcu **pp); 910 void br_multicast_count(struct net_bridge *br, 911 const struct net_bridge_port *p, 912 const struct sk_buff *skb, u8 type, u8 dir); 913 int br_multicast_init_stats(struct net_bridge *br); 914 void br_multicast_uninit_stats(struct net_bridge *br); 915 void br_multicast_get_stats(const struct net_bridge *br, 916 const struct net_bridge_port *p, 917 struct br_mcast_stats *dest); 918 void br_mdb_init(void); 919 void br_mdb_uninit(void); 920 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 921 struct net_bridge_mdb_entry *mp, bool notify); 922 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 923 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 924 u8 filter_mode); 925 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 926 struct net_bridge_port_group *sg); 927 struct net_bridge_group_src * 928 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 929 void br_multicast_del_group_src(struct net_bridge_group_src *src, 930 bool fastleave); 931 void br_multicast_ctx_init(struct net_bridge *br, 932 struct net_bridge_vlan *vlan, 933 struct net_bridge_mcast *brmctx); 934 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 935 void br_multicast_port_ctx_init(struct net_bridge_port *port, 936 struct net_bridge_vlan *vlan, 937 struct net_bridge_mcast_port *pmctx); 938 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 939 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 940 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 941 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 942 struct netlink_ext_ack *extack); 943 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 944 945 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 946 const void *ctx, bool adding, struct notifier_block *nb, 947 struct netlink_ext_ack *extack); 948 949 static inline bool br_group_is_l2(const struct br_ip *group) 950 { 951 return group->proto == 0; 952 } 953 954 #define mlock_dereference(X, br) \ 955 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 956 957 static inline struct hlist_node * 958 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 959 struct sk_buff *skb) 960 { 961 #if IS_ENABLED(CONFIG_IPV6) 962 if (skb->protocol == htons(ETH_P_IPV6)) 963 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 964 #endif 965 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 966 } 967 968 static inline struct net_bridge_port * 969 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 970 { 971 struct net_bridge_mcast_port *mctx; 972 973 #if IS_ENABLED(CONFIG_IPV6) 974 if (skb->protocol == htons(ETH_P_IPV6)) 975 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 976 ip6_rlist); 977 else 978 #endif 979 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 980 ip4_rlist); 981 982 if (mctx) 983 return mctx->port; 984 else 985 return NULL; 986 } 987 988 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 989 { 990 return timer_pending(&brmctx->ip4_mc_router_timer); 991 } 992 993 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 994 { 995 #if IS_ENABLED(CONFIG_IPV6) 996 return timer_pending(&brmctx->ip6_mc_router_timer); 997 #else 998 return false; 999 #endif 1000 } 1001 1002 static inline bool 1003 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1004 { 1005 switch (brmctx->multicast_router) { 1006 case MDB_RTR_TYPE_PERM: 1007 return true; 1008 case MDB_RTR_TYPE_TEMP_QUERY: 1009 if (skb) { 1010 if (skb->protocol == htons(ETH_P_IP)) 1011 return br_ip4_multicast_is_router(brmctx); 1012 else if (skb->protocol == htons(ETH_P_IPV6)) 1013 return br_ip6_multicast_is_router(brmctx); 1014 } else { 1015 return br_ip4_multicast_is_router(brmctx) || 1016 br_ip6_multicast_is_router(brmctx); 1017 } 1018 fallthrough; 1019 default: 1020 return false; 1021 } 1022 } 1023 1024 static inline bool 1025 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1026 struct bridge_mcast_other_query *querier, 1027 const bool is_ipv6) 1028 { 1029 bool own_querier_enabled; 1030 1031 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 1032 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1033 own_querier_enabled = false; 1034 else 1035 own_querier_enabled = true; 1036 } else { 1037 own_querier_enabled = false; 1038 } 1039 1040 return time_is_before_jiffies(querier->delay_time) && 1041 (own_querier_enabled || timer_pending(&querier->timer)); 1042 } 1043 1044 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1045 struct ethhdr *eth, 1046 const struct net_bridge_mdb_entry *mdb) 1047 { 1048 switch (eth->h_proto) { 1049 case (htons(ETH_P_IP)): 1050 return __br_multicast_querier_exists(brmctx, 1051 &brmctx->ip4_other_query, false); 1052 #if IS_ENABLED(CONFIG_IPV6) 1053 case (htons(ETH_P_IPV6)): 1054 return __br_multicast_querier_exists(brmctx, 1055 &brmctx->ip6_other_query, true); 1056 #endif 1057 default: 1058 return !!mdb && br_group_is_l2(&mdb->addr); 1059 } 1060 } 1061 1062 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1063 { 1064 switch (ip->proto) { 1065 case htons(ETH_P_IP): 1066 return ipv4_is_zeronet(ip->src.ip4); 1067 #if IS_ENABLED(CONFIG_IPV6) 1068 case htons(ETH_P_IPV6): 1069 return ipv6_addr_any(&ip->src.ip6); 1070 #endif 1071 default: 1072 return false; 1073 } 1074 } 1075 1076 static inline bool 1077 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1078 __be16 proto) 1079 { 1080 switch (proto) { 1081 case htons(ETH_P_IP): 1082 return !!(brmctx->multicast_igmp_version == 3); 1083 #if IS_ENABLED(CONFIG_IPV6) 1084 case htons(ETH_P_IPV6): 1085 return !!(brmctx->multicast_mld_version == 2); 1086 #endif 1087 default: 1088 return false; 1089 } 1090 } 1091 1092 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1093 { 1094 return BR_INPUT_SKB_CB(skb)->igmp; 1095 } 1096 1097 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1098 { 1099 return brmctx->multicast_last_member_interval * 1100 brmctx->multicast_last_member_count; 1101 } 1102 1103 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1104 { 1105 /* use the RFC default of 2 for QRV */ 1106 return 2 * brmctx->multicast_query_interval + 1107 brmctx->multicast_query_response_interval; 1108 } 1109 1110 static inline bool 1111 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1112 { 1113 return !!brmctx->vlan; 1114 } 1115 1116 static inline bool 1117 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1118 { 1119 return !!pmctx->vlan; 1120 } 1121 1122 static inline struct net_bridge_mcast * 1123 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1124 { 1125 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1126 return &pmctx->port->br->multicast_ctx; 1127 else 1128 return &pmctx->vlan->brvlan->br_mcast_ctx; 1129 } 1130 1131 static inline bool 1132 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1133 { 1134 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1135 br_multicast_ctx_is_vlan(brmctx) && 1136 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1137 } 1138 1139 static inline bool 1140 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1141 { 1142 return br_multicast_ctx_is_vlan(brmctx) && 1143 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1144 } 1145 1146 static inline bool 1147 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1148 { 1149 return br_multicast_port_ctx_is_vlan(pmctx) && 1150 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1151 } 1152 1153 static inline bool 1154 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1155 { 1156 return pmctx->port->state == BR_STATE_DISABLED || 1157 (br_multicast_port_ctx_is_vlan(pmctx) && 1158 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1159 pmctx->vlan->state == BR_STATE_DISABLED)); 1160 } 1161 1162 static inline bool 1163 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1164 { 1165 return br_multicast_port_ctx_state_disabled(pmctx) || 1166 pmctx->port->state == BR_STATE_BLOCKING || 1167 (br_multicast_port_ctx_is_vlan(pmctx) && 1168 pmctx->vlan->state == BR_STATE_BLOCKING); 1169 } 1170 1171 static inline bool 1172 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1173 const struct net_bridge_mcast *brmctx2) 1174 { 1175 return brmctx1->multicast_igmp_version == 1176 brmctx2->multicast_igmp_version && 1177 #if IS_ENABLED(CONFIG_IPV6) 1178 brmctx1->multicast_mld_version == 1179 brmctx2->multicast_mld_version && 1180 #endif 1181 true; 1182 } 1183 #else 1184 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1185 struct net_bridge_mcast_port **pmctx, 1186 struct net_bridge_vlan *vlan, 1187 struct sk_buff *skb, 1188 u16 vid) 1189 { 1190 return 0; 1191 } 1192 1193 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1194 struct sk_buff *skb, u16 vid) 1195 { 1196 return NULL; 1197 } 1198 1199 static inline int br_multicast_add_port(struct net_bridge_port *port) 1200 { 1201 return 0; 1202 } 1203 1204 static inline void br_multicast_del_port(struct net_bridge_port *port) 1205 { 1206 } 1207 1208 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1209 { 1210 } 1211 1212 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1213 { 1214 } 1215 1216 static inline void br_multicast_init(struct net_bridge *br) 1217 { 1218 } 1219 1220 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1221 { 1222 } 1223 1224 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1225 { 1226 } 1227 1228 static inline void br_multicast_open(struct net_bridge *br) 1229 { 1230 } 1231 1232 static inline void br_multicast_stop(struct net_bridge *br) 1233 { 1234 } 1235 1236 static inline void br_multicast_dev_del(struct net_bridge *br) 1237 { 1238 } 1239 1240 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1241 struct sk_buff *skb, 1242 struct net_bridge_mcast *brmctx, 1243 bool local_rcv, bool local_orig) 1244 { 1245 } 1246 1247 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1248 struct sk_buff *skb) 1249 { 1250 return false; 1251 } 1252 1253 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1254 struct ethhdr *eth, 1255 const struct net_bridge_mdb_entry *mdb) 1256 { 1257 return false; 1258 } 1259 1260 static inline void br_mdb_init(void) 1261 { 1262 } 1263 1264 static inline void br_mdb_uninit(void) 1265 { 1266 } 1267 1268 static inline int br_mdb_hash_init(struct net_bridge *br) 1269 { 1270 return 0; 1271 } 1272 1273 static inline void br_mdb_hash_fini(struct net_bridge *br) 1274 { 1275 } 1276 1277 static inline void br_multicast_count(struct net_bridge *br, 1278 const struct net_bridge_port *p, 1279 const struct sk_buff *skb, 1280 u8 type, u8 dir) 1281 { 1282 } 1283 1284 static inline int br_multicast_init_stats(struct net_bridge *br) 1285 { 1286 return 0; 1287 } 1288 1289 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1290 { 1291 } 1292 1293 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1294 { 1295 return 0; 1296 } 1297 1298 static inline void br_multicast_ctx_init(struct net_bridge *br, 1299 struct net_bridge_vlan *vlan, 1300 struct net_bridge_mcast *brmctx) 1301 { 1302 } 1303 1304 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1305 { 1306 } 1307 1308 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1309 struct net_bridge_vlan *vlan, 1310 struct net_bridge_mcast_port *pmctx) 1311 { 1312 } 1313 1314 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1315 { 1316 } 1317 1318 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1319 bool on) 1320 { 1321 } 1322 1323 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1324 bool on) 1325 { 1326 } 1327 1328 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1329 bool on, 1330 struct netlink_ext_ack *extack) 1331 { 1332 return -EOPNOTSUPP; 1333 } 1334 1335 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1336 bool on) 1337 { 1338 return false; 1339 } 1340 1341 static inline int br_mdb_replay(struct net_device *br_dev, 1342 struct net_device *dev, const void *ctx, 1343 bool adding, struct notifier_block *nb, 1344 struct netlink_ext_ack *extack) 1345 { 1346 return -EOPNOTSUPP; 1347 } 1348 1349 static inline bool 1350 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1351 const struct net_bridge_mcast *brmctx2) 1352 { 1353 return true; 1354 } 1355 #endif 1356 1357 /* br_vlan.c */ 1358 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1359 bool br_allowed_ingress(const struct net_bridge *br, 1360 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1361 u16 *vid, u8 *state, 1362 struct net_bridge_vlan **vlan); 1363 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1364 const struct sk_buff *skb); 1365 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1366 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1367 const struct net_bridge_port *port, 1368 struct net_bridge_vlan_group *vg, 1369 struct sk_buff *skb); 1370 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1371 bool *changed, struct netlink_ext_ack *extack); 1372 int br_vlan_delete(struct net_bridge *br, u16 vid); 1373 void br_vlan_flush(struct net_bridge *br); 1374 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1375 void br_recalculate_fwd_mask(struct net_bridge *br); 1376 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1377 struct netlink_ext_ack *extack); 1378 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1379 struct netlink_ext_ack *extack); 1380 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1381 struct netlink_ext_ack *extack); 1382 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1383 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1384 int br_vlan_init(struct net_bridge *br); 1385 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1386 struct netlink_ext_ack *extack); 1387 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1388 struct netlink_ext_ack *extack); 1389 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1390 bool *changed, struct netlink_ext_ack *extack); 1391 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1392 void nbp_vlan_flush(struct net_bridge_port *port); 1393 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1394 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1395 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1396 struct pcpu_sw_netstats *stats); 1397 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1398 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1399 void *ptr); 1400 void br_vlan_rtnl_init(void); 1401 void br_vlan_rtnl_uninit(void); 1402 void br_vlan_notify(const struct net_bridge *br, 1403 const struct net_bridge_port *p, 1404 u16 vid, u16 vid_range, 1405 int cmd); 1406 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1407 const void *ctx, bool adding, struct notifier_block *nb, 1408 struct netlink_ext_ack *extack); 1409 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1410 const struct net_bridge_vlan *range_end); 1411 1412 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1413 struct net_device_path_ctx *ctx, 1414 struct net_device_path *path); 1415 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1416 struct net_bridge_port *dst, 1417 struct net_device_path *path); 1418 1419 static inline struct net_bridge_vlan_group *br_vlan_group( 1420 const struct net_bridge *br) 1421 { 1422 return rtnl_dereference(br->vlgrp); 1423 } 1424 1425 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1426 const struct net_bridge_port *p) 1427 { 1428 return rtnl_dereference(p->vlgrp); 1429 } 1430 1431 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1432 const struct net_bridge *br) 1433 { 1434 return rcu_dereference(br->vlgrp); 1435 } 1436 1437 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1438 const struct net_bridge_port *p) 1439 { 1440 return rcu_dereference(p->vlgrp); 1441 } 1442 1443 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1444 * skb, the vlan tag will always be present if the frame was tagged. 1445 */ 1446 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1447 { 1448 int err = 0; 1449 1450 if (skb_vlan_tag_present(skb)) { 1451 *vid = skb_vlan_tag_get_id(skb); 1452 } else { 1453 *vid = 0; 1454 err = -EINVAL; 1455 } 1456 1457 return err; 1458 } 1459 1460 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1461 { 1462 if (!vg) 1463 return 0; 1464 1465 smp_rmb(); 1466 return vg->pvid; 1467 } 1468 1469 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1470 { 1471 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1472 } 1473 #else 1474 static inline bool br_allowed_ingress(const struct net_bridge *br, 1475 struct net_bridge_vlan_group *vg, 1476 struct sk_buff *skb, 1477 u16 *vid, u8 *state, 1478 struct net_bridge_vlan **vlan) 1479 1480 { 1481 *vlan = NULL; 1482 return true; 1483 } 1484 1485 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1486 const struct sk_buff *skb) 1487 { 1488 return true; 1489 } 1490 1491 static inline bool br_should_learn(struct net_bridge_port *p, 1492 struct sk_buff *skb, u16 *vid) 1493 { 1494 return true; 1495 } 1496 1497 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1498 const struct net_bridge_port *port, 1499 struct net_bridge_vlan_group *vg, 1500 struct sk_buff *skb) 1501 { 1502 return skb; 1503 } 1504 1505 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1506 bool *changed, struct netlink_ext_ack *extack) 1507 { 1508 *changed = false; 1509 return -EOPNOTSUPP; 1510 } 1511 1512 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1513 { 1514 return -EOPNOTSUPP; 1515 } 1516 1517 static inline void br_vlan_flush(struct net_bridge *br) 1518 { 1519 } 1520 1521 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1522 { 1523 } 1524 1525 static inline int br_vlan_init(struct net_bridge *br) 1526 { 1527 return 0; 1528 } 1529 1530 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1531 bool *changed, struct netlink_ext_ack *extack) 1532 { 1533 *changed = false; 1534 return -EOPNOTSUPP; 1535 } 1536 1537 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1538 { 1539 return -EOPNOTSUPP; 1540 } 1541 1542 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1543 { 1544 } 1545 1546 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1547 u16 vid) 1548 { 1549 return NULL; 1550 } 1551 1552 static inline int nbp_vlan_init(struct net_bridge_port *port, 1553 struct netlink_ext_ack *extack) 1554 { 1555 return 0; 1556 } 1557 1558 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1559 { 1560 return 0; 1561 } 1562 1563 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1564 { 1565 return 0; 1566 } 1567 1568 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1569 unsigned long val, 1570 struct netlink_ext_ack *extack) 1571 { 1572 return -EOPNOTSUPP; 1573 } 1574 1575 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1576 u32 filter_mask) 1577 { 1578 return 0; 1579 } 1580 1581 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1582 struct net_device_path_ctx *ctx, 1583 struct net_device_path *path) 1584 { 1585 } 1586 1587 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1588 struct net_bridge_port *dst, 1589 struct net_device_path *path) 1590 { 1591 return 0; 1592 } 1593 1594 static inline struct net_bridge_vlan_group *br_vlan_group( 1595 const struct net_bridge *br) 1596 { 1597 return NULL; 1598 } 1599 1600 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1601 const struct net_bridge_port *p) 1602 { 1603 return NULL; 1604 } 1605 1606 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1607 const struct net_bridge *br) 1608 { 1609 return NULL; 1610 } 1611 1612 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1613 const struct net_bridge_port *p) 1614 { 1615 return NULL; 1616 } 1617 1618 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1619 struct pcpu_sw_netstats *stats) 1620 { 1621 } 1622 1623 static inline void br_vlan_port_event(struct net_bridge_port *p, 1624 unsigned long event) 1625 { 1626 } 1627 1628 static inline int br_vlan_bridge_event(struct net_device *dev, 1629 unsigned long event, void *ptr) 1630 { 1631 return 0; 1632 } 1633 1634 static inline void br_vlan_rtnl_init(void) 1635 { 1636 } 1637 1638 static inline void br_vlan_rtnl_uninit(void) 1639 { 1640 } 1641 1642 static inline void br_vlan_notify(const struct net_bridge *br, 1643 const struct net_bridge_port *p, 1644 u16 vid, u16 vid_range, 1645 int cmd) 1646 { 1647 } 1648 1649 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1650 const struct net_bridge_vlan *range_end) 1651 { 1652 return true; 1653 } 1654 1655 static inline int br_vlan_replay(struct net_device *br_dev, 1656 struct net_device *dev, const void *ctx, 1657 bool adding, struct notifier_block *nb, 1658 struct netlink_ext_ack *extack) 1659 { 1660 return -EOPNOTSUPP; 1661 } 1662 #endif 1663 1664 /* br_vlan_options.c */ 1665 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1666 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1667 const struct net_bridge_vlan *range_end); 1668 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1669 size_t br_vlan_opts_nl_size(void); 1670 int br_vlan_process_options(const struct net_bridge *br, 1671 const struct net_bridge_port *p, 1672 struct net_bridge_vlan *range_start, 1673 struct net_bridge_vlan *range_end, 1674 struct nlattr **tb, 1675 struct netlink_ext_ack *extack); 1676 int br_vlan_rtm_process_global_options(struct net_device *dev, 1677 const struct nlattr *attr, 1678 int cmd, 1679 struct netlink_ext_ack *extack); 1680 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1681 const struct net_bridge_vlan *r_end); 1682 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1683 const struct net_bridge_vlan *v_opts); 1684 1685 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1686 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1687 { 1688 return READ_ONCE(v->state); 1689 } 1690 1691 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1692 { 1693 WRITE_ONCE(v->state, state); 1694 } 1695 1696 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1697 { 1698 return READ_ONCE(vg->pvid_state); 1699 } 1700 1701 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1702 u8 state) 1703 { 1704 WRITE_ONCE(vg->pvid_state, state); 1705 } 1706 1707 /* learn_allow is true at ingress and false at egress */ 1708 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1709 { 1710 switch (state) { 1711 case BR_STATE_LEARNING: 1712 return learn_allow; 1713 case BR_STATE_FORWARDING: 1714 return true; 1715 default: 1716 return false; 1717 } 1718 } 1719 #endif 1720 1721 struct nf_br_ops { 1722 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1723 }; 1724 extern const struct nf_br_ops __rcu *nf_br_ops; 1725 1726 /* br_netfilter.c */ 1727 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1728 int br_nf_core_init(void); 1729 void br_nf_core_fini(void); 1730 void br_netfilter_rtable_init(struct net_bridge *); 1731 #else 1732 static inline int br_nf_core_init(void) { return 0; } 1733 static inline void br_nf_core_fini(void) {} 1734 #define br_netfilter_rtable_init(x) 1735 #endif 1736 1737 /* br_stp.c */ 1738 void br_set_state(struct net_bridge_port *p, unsigned int state); 1739 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1740 void br_init_port(struct net_bridge_port *p); 1741 void br_become_designated_port(struct net_bridge_port *p); 1742 1743 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1744 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1745 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1746 int br_set_max_age(struct net_bridge *br, unsigned long x); 1747 int __set_ageing_time(struct net_device *dev, unsigned long t); 1748 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1749 1750 1751 /* br_stp_if.c */ 1752 void br_stp_enable_bridge(struct net_bridge *br); 1753 void br_stp_disable_bridge(struct net_bridge *br); 1754 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1755 struct netlink_ext_ack *extack); 1756 void br_stp_enable_port(struct net_bridge_port *p); 1757 void br_stp_disable_port(struct net_bridge_port *p); 1758 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1759 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1760 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1761 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1762 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1763 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1764 1765 /* br_stp_bpdu.c */ 1766 struct stp_proto; 1767 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1768 struct net_device *dev); 1769 1770 /* br_stp_timer.c */ 1771 void br_stp_timer_init(struct net_bridge *br); 1772 void br_stp_port_timer_init(struct net_bridge_port *p); 1773 unsigned long br_timer_value(const struct timer_list *timer); 1774 1775 /* br.c */ 1776 #if IS_ENABLED(CONFIG_ATM_LANE) 1777 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1778 #endif 1779 1780 /* br_mrp.c */ 1781 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1782 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1783 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1784 bool br_mrp_enabled(struct net_bridge *br); 1785 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1786 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1787 #else 1788 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1789 struct nlattr *attr, int cmd, 1790 struct netlink_ext_ack *extack) 1791 { 1792 return -EOPNOTSUPP; 1793 } 1794 1795 static inline bool br_mrp_enabled(struct net_bridge *br) 1796 { 1797 return false; 1798 } 1799 1800 static inline void br_mrp_port_del(struct net_bridge *br, 1801 struct net_bridge_port *p) 1802 { 1803 } 1804 1805 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1806 { 1807 return 0; 1808 } 1809 1810 #endif 1811 1812 /* br_cfm.c */ 1813 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1814 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1815 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1816 bool br_cfm_created(struct net_bridge *br); 1817 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1818 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1819 int br_cfm_status_fill_info(struct sk_buff *skb, 1820 struct net_bridge *br, 1821 bool getlink); 1822 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1823 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1824 #else 1825 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1826 struct nlattr *attr, int cmd, 1827 struct netlink_ext_ack *extack) 1828 { 1829 return -EOPNOTSUPP; 1830 } 1831 1832 static inline bool br_cfm_created(struct net_bridge *br) 1833 { 1834 return false; 1835 } 1836 1837 static inline void br_cfm_port_del(struct net_bridge *br, 1838 struct net_bridge_port *p) 1839 { 1840 } 1841 1842 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1843 { 1844 return -EOPNOTSUPP; 1845 } 1846 1847 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1848 struct net_bridge *br, 1849 bool getlink) 1850 { 1851 return -EOPNOTSUPP; 1852 } 1853 1854 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1855 { 1856 return -EOPNOTSUPP; 1857 } 1858 1859 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1860 { 1861 return -EOPNOTSUPP; 1862 } 1863 #endif 1864 1865 /* br_netlink.c */ 1866 extern struct rtnl_link_ops br_link_ops; 1867 int br_netlink_init(void); 1868 void br_netlink_fini(void); 1869 void br_ifinfo_notify(int event, const struct net_bridge *br, 1870 const struct net_bridge_port *port); 1871 void br_info_notify(int event, const struct net_bridge *br, 1872 const struct net_bridge_port *port, u32 filter); 1873 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1874 struct netlink_ext_ack *extack); 1875 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1876 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1877 u32 filter_mask, int nlflags); 1878 int br_process_vlan_info(struct net_bridge *br, 1879 struct net_bridge_port *p, int cmd, 1880 struct bridge_vlan_info *vinfo_curr, 1881 struct bridge_vlan_info **vinfo_last, 1882 bool *changed, 1883 struct netlink_ext_ack *extack); 1884 1885 #ifdef CONFIG_SYSFS 1886 /* br_sysfs_if.c */ 1887 extern const struct sysfs_ops brport_sysfs_ops; 1888 int br_sysfs_addif(struct net_bridge_port *p); 1889 int br_sysfs_renameif(struct net_bridge_port *p); 1890 1891 /* br_sysfs_br.c */ 1892 int br_sysfs_addbr(struct net_device *dev); 1893 void br_sysfs_delbr(struct net_device *dev); 1894 1895 #else 1896 1897 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1898 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1899 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1900 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1901 #endif /* CONFIG_SYSFS */ 1902 1903 /* br_switchdev.c */ 1904 #ifdef CONFIG_NET_SWITCHDEV 1905 int br_switchdev_port_offload(struct net_bridge_port *p, 1906 struct net_device *dev, const void *ctx, 1907 struct notifier_block *atomic_nb, 1908 struct notifier_block *blocking_nb, 1909 bool tx_fwd_offload, 1910 struct netlink_ext_ack *extack); 1911 1912 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1913 struct notifier_block *atomic_nb, 1914 struct notifier_block *blocking_nb); 1915 1916 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1917 1918 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1919 1920 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1921 struct sk_buff *skb); 1922 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1923 struct sk_buff *skb); 1924 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1925 struct sk_buff *skb); 1926 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1927 const struct sk_buff *skb); 1928 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1929 unsigned long flags, 1930 unsigned long mask, 1931 struct netlink_ext_ack *extack); 1932 void br_switchdev_fdb_notify(struct net_bridge *br, 1933 const struct net_bridge_fdb_entry *fdb, int type); 1934 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1935 struct netlink_ext_ack *extack); 1936 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1937 void br_switchdev_init(struct net_bridge *br); 1938 1939 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1940 { 1941 skb->offload_fwd_mark = 0; 1942 } 1943 #else 1944 static inline int 1945 br_switchdev_port_offload(struct net_bridge_port *p, 1946 struct net_device *dev, const void *ctx, 1947 struct notifier_block *atomic_nb, 1948 struct notifier_block *blocking_nb, 1949 bool tx_fwd_offload, 1950 struct netlink_ext_ack *extack) 1951 { 1952 return -EOPNOTSUPP; 1953 } 1954 1955 static inline void 1956 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1957 struct notifier_block *atomic_nb, 1958 struct notifier_block *blocking_nb) 1959 { 1960 } 1961 1962 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 1963 { 1964 return false; 1965 } 1966 1967 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 1968 { 1969 } 1970 1971 static inline void 1972 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1973 struct sk_buff *skb) 1974 { 1975 } 1976 1977 static inline void 1978 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1979 struct sk_buff *skb) 1980 { 1981 } 1982 1983 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1984 struct sk_buff *skb) 1985 { 1986 } 1987 1988 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1989 const struct sk_buff *skb) 1990 { 1991 return true; 1992 } 1993 1994 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1995 unsigned long flags, 1996 unsigned long mask, 1997 struct netlink_ext_ack *extack) 1998 { 1999 return 0; 2000 } 2001 2002 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2003 u16 vid, u16 flags, 2004 struct netlink_ext_ack *extack) 2005 { 2006 return -EOPNOTSUPP; 2007 } 2008 2009 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2010 { 2011 return -EOPNOTSUPP; 2012 } 2013 2014 static inline void 2015 br_switchdev_fdb_notify(struct net_bridge *br, 2016 const struct net_bridge_fdb_entry *fdb, int type) 2017 { 2018 } 2019 2020 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2021 { 2022 } 2023 2024 static inline void br_switchdev_init(struct net_bridge *br) 2025 { 2026 } 2027 2028 #endif /* CONFIG_NET_SWITCHDEV */ 2029 2030 /* br_arp_nd_proxy.c */ 2031 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2032 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2033 u16 vid, struct net_bridge_port *p); 2034 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2035 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2036 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2037 #endif 2038