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, 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 struct net_device *dev, 781 const void *ctx, bool adding, 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_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 855 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 856 void __user *data, int cmd); 857 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 858 void __user *arg); 859 860 /* br_multicast.c */ 861 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 862 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 863 struct net_bridge_mcast_port **pmctx, 864 struct net_bridge_vlan *vlan, 865 struct sk_buff *skb, u16 vid); 866 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 867 struct sk_buff *skb, u16 vid); 868 int br_multicast_add_port(struct net_bridge_port *port); 869 void br_multicast_del_port(struct net_bridge_port *port); 870 void br_multicast_enable_port(struct net_bridge_port *port); 871 void br_multicast_disable_port(struct net_bridge_port *port); 872 void br_multicast_init(struct net_bridge *br); 873 void br_multicast_join_snoopers(struct net_bridge *br); 874 void br_multicast_leave_snoopers(struct net_bridge *br); 875 void br_multicast_open(struct net_bridge *br); 876 void br_multicast_stop(struct net_bridge *br); 877 void br_multicast_dev_del(struct net_bridge *br); 878 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 879 struct net_bridge_mcast *brmctx, 880 bool local_rcv, bool local_orig); 881 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 882 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 883 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 884 struct netlink_ext_ack *extack); 885 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 886 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 887 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 888 #if IS_ENABLED(CONFIG_IPV6) 889 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 890 #endif 891 struct net_bridge_mdb_entry * 892 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 893 struct net_bridge_mdb_entry * 894 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 895 struct net_bridge_port_group * 896 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 897 struct net_bridge_port_group __rcu *next, 898 unsigned char flags, const unsigned char *src, 899 u8 filter_mode, u8 rt_protocol); 900 int br_mdb_hash_init(struct net_bridge *br); 901 void br_mdb_hash_fini(struct net_bridge *br); 902 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 903 struct net_bridge_port_group *pg, int type); 904 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 905 int type); 906 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 907 struct net_bridge_port_group *pg, 908 struct net_bridge_port_group __rcu **pp); 909 void br_multicast_count(struct net_bridge *br, 910 const struct net_bridge_port *p, 911 const struct sk_buff *skb, u8 type, u8 dir); 912 int br_multicast_init_stats(struct net_bridge *br); 913 void br_multicast_uninit_stats(struct net_bridge *br); 914 void br_multicast_get_stats(const struct net_bridge *br, 915 const struct net_bridge_port *p, 916 struct br_mcast_stats *dest); 917 void br_mdb_init(void); 918 void br_mdb_uninit(void); 919 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 920 struct net_bridge_mdb_entry *mp, bool notify); 921 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 922 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 923 u8 filter_mode); 924 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 925 struct net_bridge_port_group *sg); 926 struct net_bridge_group_src * 927 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 928 void br_multicast_del_group_src(struct net_bridge_group_src *src, 929 bool fastleave); 930 void br_multicast_ctx_init(struct net_bridge *br, 931 struct net_bridge_vlan *vlan, 932 struct net_bridge_mcast *brmctx); 933 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 934 void br_multicast_port_ctx_init(struct net_bridge_port *port, 935 struct net_bridge_vlan *vlan, 936 struct net_bridge_mcast_port *pmctx); 937 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 938 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 939 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 940 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 941 struct netlink_ext_ack *extack); 942 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 943 944 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 945 const void *ctx, bool adding, struct notifier_block *nb, 946 struct netlink_ext_ack *extack); 947 948 static inline bool br_group_is_l2(const struct br_ip *group) 949 { 950 return group->proto == 0; 951 } 952 953 #define mlock_dereference(X, br) \ 954 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 955 956 static inline struct hlist_node * 957 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 958 struct sk_buff *skb) 959 { 960 #if IS_ENABLED(CONFIG_IPV6) 961 if (skb->protocol == htons(ETH_P_IPV6)) 962 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 963 #endif 964 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 965 } 966 967 static inline struct net_bridge_port * 968 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 969 { 970 struct net_bridge_mcast_port *mctx; 971 972 #if IS_ENABLED(CONFIG_IPV6) 973 if (skb->protocol == htons(ETH_P_IPV6)) 974 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 975 ip6_rlist); 976 else 977 #endif 978 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 979 ip4_rlist); 980 981 if (mctx) 982 return mctx->port; 983 else 984 return NULL; 985 } 986 987 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 988 { 989 return timer_pending(&brmctx->ip4_mc_router_timer); 990 } 991 992 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 993 { 994 #if IS_ENABLED(CONFIG_IPV6) 995 return timer_pending(&brmctx->ip6_mc_router_timer); 996 #else 997 return false; 998 #endif 999 } 1000 1001 static inline bool 1002 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1003 { 1004 switch (brmctx->multicast_router) { 1005 case MDB_RTR_TYPE_PERM: 1006 return true; 1007 case MDB_RTR_TYPE_TEMP_QUERY: 1008 if (skb) { 1009 if (skb->protocol == htons(ETH_P_IP)) 1010 return br_ip4_multicast_is_router(brmctx); 1011 else if (skb->protocol == htons(ETH_P_IPV6)) 1012 return br_ip6_multicast_is_router(brmctx); 1013 } else { 1014 return br_ip4_multicast_is_router(brmctx) || 1015 br_ip6_multicast_is_router(brmctx); 1016 } 1017 fallthrough; 1018 default: 1019 return false; 1020 } 1021 } 1022 1023 static inline bool 1024 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1025 struct bridge_mcast_other_query *querier, 1026 const bool is_ipv6) 1027 { 1028 bool own_querier_enabled; 1029 1030 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 1031 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1032 own_querier_enabled = false; 1033 else 1034 own_querier_enabled = true; 1035 } else { 1036 own_querier_enabled = false; 1037 } 1038 1039 return time_is_before_jiffies(querier->delay_time) && 1040 (own_querier_enabled || timer_pending(&querier->timer)); 1041 } 1042 1043 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1044 struct ethhdr *eth, 1045 const struct net_bridge_mdb_entry *mdb) 1046 { 1047 switch (eth->h_proto) { 1048 case (htons(ETH_P_IP)): 1049 return __br_multicast_querier_exists(brmctx, 1050 &brmctx->ip4_other_query, false); 1051 #if IS_ENABLED(CONFIG_IPV6) 1052 case (htons(ETH_P_IPV6)): 1053 return __br_multicast_querier_exists(brmctx, 1054 &brmctx->ip6_other_query, true); 1055 #endif 1056 default: 1057 return !!mdb && br_group_is_l2(&mdb->addr); 1058 } 1059 } 1060 1061 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1062 { 1063 switch (ip->proto) { 1064 case htons(ETH_P_IP): 1065 return ipv4_is_zeronet(ip->src.ip4); 1066 #if IS_ENABLED(CONFIG_IPV6) 1067 case htons(ETH_P_IPV6): 1068 return ipv6_addr_any(&ip->src.ip6); 1069 #endif 1070 default: 1071 return false; 1072 } 1073 } 1074 1075 static inline bool 1076 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1077 __be16 proto) 1078 { 1079 switch (proto) { 1080 case htons(ETH_P_IP): 1081 return !!(brmctx->multicast_igmp_version == 3); 1082 #if IS_ENABLED(CONFIG_IPV6) 1083 case htons(ETH_P_IPV6): 1084 return !!(brmctx->multicast_mld_version == 2); 1085 #endif 1086 default: 1087 return false; 1088 } 1089 } 1090 1091 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1092 { 1093 return BR_INPUT_SKB_CB(skb)->igmp; 1094 } 1095 1096 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1097 { 1098 return brmctx->multicast_last_member_interval * 1099 brmctx->multicast_last_member_count; 1100 } 1101 1102 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1103 { 1104 /* use the RFC default of 2 for QRV */ 1105 return 2 * brmctx->multicast_query_interval + 1106 brmctx->multicast_query_response_interval; 1107 } 1108 1109 static inline bool 1110 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1111 { 1112 return !!brmctx->vlan; 1113 } 1114 1115 static inline bool 1116 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1117 { 1118 return !!pmctx->vlan; 1119 } 1120 1121 static inline struct net_bridge_mcast * 1122 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1123 { 1124 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1125 return &pmctx->port->br->multicast_ctx; 1126 else 1127 return &pmctx->vlan->brvlan->br_mcast_ctx; 1128 } 1129 1130 static inline bool 1131 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1132 { 1133 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1134 br_multicast_ctx_is_vlan(brmctx) && 1135 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1136 } 1137 1138 static inline bool 1139 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1140 { 1141 return br_multicast_ctx_is_vlan(brmctx) && 1142 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1143 } 1144 1145 static inline bool 1146 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1147 { 1148 return br_multicast_port_ctx_is_vlan(pmctx) && 1149 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1150 } 1151 1152 static inline bool 1153 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1154 { 1155 return pmctx->port->state == BR_STATE_DISABLED || 1156 (br_multicast_port_ctx_is_vlan(pmctx) && 1157 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1158 pmctx->vlan->state == BR_STATE_DISABLED)); 1159 } 1160 1161 static inline bool 1162 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1163 { 1164 return br_multicast_port_ctx_state_disabled(pmctx) || 1165 pmctx->port->state == BR_STATE_BLOCKING || 1166 (br_multicast_port_ctx_is_vlan(pmctx) && 1167 pmctx->vlan->state == BR_STATE_BLOCKING); 1168 } 1169 #else 1170 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1171 struct net_bridge_mcast_port **pmctx, 1172 struct net_bridge_vlan *vlan, 1173 struct sk_buff *skb, 1174 u16 vid) 1175 { 1176 return 0; 1177 } 1178 1179 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1180 struct sk_buff *skb, u16 vid) 1181 { 1182 return NULL; 1183 } 1184 1185 static inline int br_multicast_add_port(struct net_bridge_port *port) 1186 { 1187 return 0; 1188 } 1189 1190 static inline void br_multicast_del_port(struct net_bridge_port *port) 1191 { 1192 } 1193 1194 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1195 { 1196 } 1197 1198 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1199 { 1200 } 1201 1202 static inline void br_multicast_init(struct net_bridge *br) 1203 { 1204 } 1205 1206 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1207 { 1208 } 1209 1210 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1211 { 1212 } 1213 1214 static inline void br_multicast_open(struct net_bridge *br) 1215 { 1216 } 1217 1218 static inline void br_multicast_stop(struct net_bridge *br) 1219 { 1220 } 1221 1222 static inline void br_multicast_dev_del(struct net_bridge *br) 1223 { 1224 } 1225 1226 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1227 struct sk_buff *skb, 1228 struct net_bridge_mcast *brmctx, 1229 bool local_rcv, bool local_orig) 1230 { 1231 } 1232 1233 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1234 struct sk_buff *skb) 1235 { 1236 return false; 1237 } 1238 1239 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1240 struct ethhdr *eth, 1241 const struct net_bridge_mdb_entry *mdb) 1242 { 1243 return false; 1244 } 1245 1246 static inline void br_mdb_init(void) 1247 { 1248 } 1249 1250 static inline void br_mdb_uninit(void) 1251 { 1252 } 1253 1254 static inline int br_mdb_hash_init(struct net_bridge *br) 1255 { 1256 return 0; 1257 } 1258 1259 static inline void br_mdb_hash_fini(struct net_bridge *br) 1260 { 1261 } 1262 1263 static inline void br_multicast_count(struct net_bridge *br, 1264 const struct net_bridge_port *p, 1265 const struct sk_buff *skb, 1266 u8 type, u8 dir) 1267 { 1268 } 1269 1270 static inline int br_multicast_init_stats(struct net_bridge *br) 1271 { 1272 return 0; 1273 } 1274 1275 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1276 { 1277 } 1278 1279 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1280 { 1281 return 0; 1282 } 1283 1284 static inline void br_multicast_ctx_init(struct net_bridge *br, 1285 struct net_bridge_vlan *vlan, 1286 struct net_bridge_mcast *brmctx) 1287 { 1288 } 1289 1290 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1291 { 1292 } 1293 1294 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1295 struct net_bridge_vlan *vlan, 1296 struct net_bridge_mcast_port *pmctx) 1297 { 1298 } 1299 1300 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1301 { 1302 } 1303 1304 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1305 bool on) 1306 { 1307 } 1308 1309 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1310 bool on) 1311 { 1312 } 1313 1314 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1315 bool on, 1316 struct netlink_ext_ack *extack) 1317 { 1318 return -EOPNOTSUPP; 1319 } 1320 1321 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1322 bool on) 1323 { 1324 return false; 1325 } 1326 1327 static inline int br_mdb_replay(struct net_device *br_dev, 1328 struct net_device *dev, const void *ctx, 1329 bool adding, struct notifier_block *nb, 1330 struct netlink_ext_ack *extack) 1331 { 1332 return -EOPNOTSUPP; 1333 } 1334 #endif 1335 1336 /* br_vlan.c */ 1337 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1338 bool br_allowed_ingress(const struct net_bridge *br, 1339 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1340 u16 *vid, u8 *state, 1341 struct net_bridge_vlan **vlan); 1342 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1343 const struct sk_buff *skb); 1344 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1345 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1346 const struct net_bridge_port *port, 1347 struct net_bridge_vlan_group *vg, 1348 struct sk_buff *skb); 1349 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1350 bool *changed, struct netlink_ext_ack *extack); 1351 int br_vlan_delete(struct net_bridge *br, u16 vid); 1352 void br_vlan_flush(struct net_bridge *br); 1353 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1354 void br_recalculate_fwd_mask(struct net_bridge *br); 1355 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1356 struct netlink_ext_ack *extack); 1357 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1358 struct netlink_ext_ack *extack); 1359 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1360 struct netlink_ext_ack *extack); 1361 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1362 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1363 int br_vlan_init(struct net_bridge *br); 1364 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1365 struct netlink_ext_ack *extack); 1366 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1367 struct netlink_ext_ack *extack); 1368 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1369 bool *changed, struct netlink_ext_ack *extack); 1370 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1371 void nbp_vlan_flush(struct net_bridge_port *port); 1372 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1373 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1374 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1375 struct pcpu_sw_netstats *stats); 1376 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1377 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1378 void *ptr); 1379 void br_vlan_rtnl_init(void); 1380 void br_vlan_rtnl_uninit(void); 1381 void br_vlan_notify(const struct net_bridge *br, 1382 const struct net_bridge_port *p, 1383 u16 vid, u16 vid_range, 1384 int cmd); 1385 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1386 const void *ctx, bool adding, struct notifier_block *nb, 1387 struct netlink_ext_ack *extack); 1388 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1389 const struct net_bridge_vlan *range_end); 1390 1391 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1392 struct net_device_path_ctx *ctx, 1393 struct net_device_path *path); 1394 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1395 struct net_bridge_port *dst, 1396 struct net_device_path *path); 1397 1398 static inline struct net_bridge_vlan_group *br_vlan_group( 1399 const struct net_bridge *br) 1400 { 1401 return rtnl_dereference(br->vlgrp); 1402 } 1403 1404 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1405 const struct net_bridge_port *p) 1406 { 1407 return rtnl_dereference(p->vlgrp); 1408 } 1409 1410 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1411 const struct net_bridge *br) 1412 { 1413 return rcu_dereference(br->vlgrp); 1414 } 1415 1416 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1417 const struct net_bridge_port *p) 1418 { 1419 return rcu_dereference(p->vlgrp); 1420 } 1421 1422 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1423 * skb, the vlan tag will always be present if the frame was tagged. 1424 */ 1425 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1426 { 1427 int err = 0; 1428 1429 if (skb_vlan_tag_present(skb)) { 1430 *vid = skb_vlan_tag_get_id(skb); 1431 } else { 1432 *vid = 0; 1433 err = -EINVAL; 1434 } 1435 1436 return err; 1437 } 1438 1439 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1440 { 1441 if (!vg) 1442 return 0; 1443 1444 smp_rmb(); 1445 return vg->pvid; 1446 } 1447 1448 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1449 { 1450 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1451 } 1452 #else 1453 static inline bool br_allowed_ingress(const struct net_bridge *br, 1454 struct net_bridge_vlan_group *vg, 1455 struct sk_buff *skb, 1456 u16 *vid, u8 *state, 1457 struct net_bridge_vlan **vlan) 1458 1459 { 1460 *vlan = NULL; 1461 return true; 1462 } 1463 1464 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1465 const struct sk_buff *skb) 1466 { 1467 return true; 1468 } 1469 1470 static inline bool br_should_learn(struct net_bridge_port *p, 1471 struct sk_buff *skb, u16 *vid) 1472 { 1473 return true; 1474 } 1475 1476 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1477 const struct net_bridge_port *port, 1478 struct net_bridge_vlan_group *vg, 1479 struct sk_buff *skb) 1480 { 1481 return skb; 1482 } 1483 1484 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1485 bool *changed, struct netlink_ext_ack *extack) 1486 { 1487 *changed = false; 1488 return -EOPNOTSUPP; 1489 } 1490 1491 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1492 { 1493 return -EOPNOTSUPP; 1494 } 1495 1496 static inline void br_vlan_flush(struct net_bridge *br) 1497 { 1498 } 1499 1500 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1501 { 1502 } 1503 1504 static inline int br_vlan_init(struct net_bridge *br) 1505 { 1506 return 0; 1507 } 1508 1509 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1510 bool *changed, struct netlink_ext_ack *extack) 1511 { 1512 *changed = false; 1513 return -EOPNOTSUPP; 1514 } 1515 1516 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1517 { 1518 return -EOPNOTSUPP; 1519 } 1520 1521 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1522 { 1523 } 1524 1525 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1526 u16 vid) 1527 { 1528 return NULL; 1529 } 1530 1531 static inline int nbp_vlan_init(struct net_bridge_port *port, 1532 struct netlink_ext_ack *extack) 1533 { 1534 return 0; 1535 } 1536 1537 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1538 { 1539 return 0; 1540 } 1541 1542 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1543 { 1544 return 0; 1545 } 1546 1547 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1548 unsigned long val, 1549 struct netlink_ext_ack *extack) 1550 { 1551 return -EOPNOTSUPP; 1552 } 1553 1554 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1555 u32 filter_mask) 1556 { 1557 return 0; 1558 } 1559 1560 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1561 struct net_device_path_ctx *ctx, 1562 struct net_device_path *path) 1563 { 1564 } 1565 1566 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1567 struct net_bridge_port *dst, 1568 struct net_device_path *path) 1569 { 1570 return 0; 1571 } 1572 1573 static inline struct net_bridge_vlan_group *br_vlan_group( 1574 const struct net_bridge *br) 1575 { 1576 return NULL; 1577 } 1578 1579 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1580 const struct net_bridge_port *p) 1581 { 1582 return NULL; 1583 } 1584 1585 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1586 const struct net_bridge *br) 1587 { 1588 return NULL; 1589 } 1590 1591 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1592 const struct net_bridge_port *p) 1593 { 1594 return NULL; 1595 } 1596 1597 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1598 struct pcpu_sw_netstats *stats) 1599 { 1600 } 1601 1602 static inline void br_vlan_port_event(struct net_bridge_port *p, 1603 unsigned long event) 1604 { 1605 } 1606 1607 static inline int br_vlan_bridge_event(struct net_device *dev, 1608 unsigned long event, void *ptr) 1609 { 1610 return 0; 1611 } 1612 1613 static inline void br_vlan_rtnl_init(void) 1614 { 1615 } 1616 1617 static inline void br_vlan_rtnl_uninit(void) 1618 { 1619 } 1620 1621 static inline void br_vlan_notify(const struct net_bridge *br, 1622 const struct net_bridge_port *p, 1623 u16 vid, u16 vid_range, 1624 int cmd) 1625 { 1626 } 1627 1628 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1629 const struct net_bridge_vlan *range_end) 1630 { 1631 return true; 1632 } 1633 1634 static inline int br_vlan_replay(struct net_device *br_dev, 1635 struct net_device *dev, const void *ctx, 1636 bool adding, struct notifier_block *nb, 1637 struct netlink_ext_ack *extack) 1638 { 1639 return -EOPNOTSUPP; 1640 } 1641 #endif 1642 1643 /* br_vlan_options.c */ 1644 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1645 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1646 const struct net_bridge_vlan *range_end); 1647 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1648 size_t br_vlan_opts_nl_size(void); 1649 int br_vlan_process_options(const struct net_bridge *br, 1650 const struct net_bridge_port *p, 1651 struct net_bridge_vlan *range_start, 1652 struct net_bridge_vlan *range_end, 1653 struct nlattr **tb, 1654 struct netlink_ext_ack *extack); 1655 int br_vlan_rtm_process_global_options(struct net_device *dev, 1656 const struct nlattr *attr, 1657 int cmd, 1658 struct netlink_ext_ack *extack); 1659 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1660 const struct net_bridge_vlan *r_end); 1661 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1662 const struct net_bridge_vlan *v_opts); 1663 1664 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1665 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1666 { 1667 return READ_ONCE(v->state); 1668 } 1669 1670 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1671 { 1672 WRITE_ONCE(v->state, state); 1673 } 1674 1675 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1676 { 1677 return READ_ONCE(vg->pvid_state); 1678 } 1679 1680 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1681 u8 state) 1682 { 1683 WRITE_ONCE(vg->pvid_state, state); 1684 } 1685 1686 /* learn_allow is true at ingress and false at egress */ 1687 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1688 { 1689 switch (state) { 1690 case BR_STATE_LEARNING: 1691 return learn_allow; 1692 case BR_STATE_FORWARDING: 1693 return true; 1694 default: 1695 return false; 1696 } 1697 } 1698 #endif 1699 1700 struct nf_br_ops { 1701 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1702 }; 1703 extern const struct nf_br_ops __rcu *nf_br_ops; 1704 1705 /* br_netfilter.c */ 1706 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1707 int br_nf_core_init(void); 1708 void br_nf_core_fini(void); 1709 void br_netfilter_rtable_init(struct net_bridge *); 1710 #else 1711 static inline int br_nf_core_init(void) { return 0; } 1712 static inline void br_nf_core_fini(void) {} 1713 #define br_netfilter_rtable_init(x) 1714 #endif 1715 1716 /* br_stp.c */ 1717 void br_set_state(struct net_bridge_port *p, unsigned int state); 1718 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1719 void br_init_port(struct net_bridge_port *p); 1720 void br_become_designated_port(struct net_bridge_port *p); 1721 1722 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1723 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1724 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1725 int br_set_max_age(struct net_bridge *br, unsigned long x); 1726 int __set_ageing_time(struct net_device *dev, unsigned long t); 1727 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1728 1729 1730 /* br_stp_if.c */ 1731 void br_stp_enable_bridge(struct net_bridge *br); 1732 void br_stp_disable_bridge(struct net_bridge *br); 1733 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1734 struct netlink_ext_ack *extack); 1735 void br_stp_enable_port(struct net_bridge_port *p); 1736 void br_stp_disable_port(struct net_bridge_port *p); 1737 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1738 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1739 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1740 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1741 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1742 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1743 1744 /* br_stp_bpdu.c */ 1745 struct stp_proto; 1746 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1747 struct net_device *dev); 1748 1749 /* br_stp_timer.c */ 1750 void br_stp_timer_init(struct net_bridge *br); 1751 void br_stp_port_timer_init(struct net_bridge_port *p); 1752 unsigned long br_timer_value(const struct timer_list *timer); 1753 1754 /* br.c */ 1755 #if IS_ENABLED(CONFIG_ATM_LANE) 1756 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1757 #endif 1758 1759 /* br_mrp.c */ 1760 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1761 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1762 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1763 bool br_mrp_enabled(struct net_bridge *br); 1764 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1765 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1766 #else 1767 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1768 struct nlattr *attr, int cmd, 1769 struct netlink_ext_ack *extack) 1770 { 1771 return -EOPNOTSUPP; 1772 } 1773 1774 static inline bool br_mrp_enabled(struct net_bridge *br) 1775 { 1776 return false; 1777 } 1778 1779 static inline void br_mrp_port_del(struct net_bridge *br, 1780 struct net_bridge_port *p) 1781 { 1782 } 1783 1784 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1785 { 1786 return 0; 1787 } 1788 1789 #endif 1790 1791 /* br_cfm.c */ 1792 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1793 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1794 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1795 bool br_cfm_created(struct net_bridge *br); 1796 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1797 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1798 int br_cfm_status_fill_info(struct sk_buff *skb, 1799 struct net_bridge *br, 1800 bool getlink); 1801 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1802 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1803 #else 1804 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1805 struct nlattr *attr, int cmd, 1806 struct netlink_ext_ack *extack) 1807 { 1808 return -EOPNOTSUPP; 1809 } 1810 1811 static inline bool br_cfm_created(struct net_bridge *br) 1812 { 1813 return false; 1814 } 1815 1816 static inline void br_cfm_port_del(struct net_bridge *br, 1817 struct net_bridge_port *p) 1818 { 1819 } 1820 1821 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1822 { 1823 return -EOPNOTSUPP; 1824 } 1825 1826 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1827 struct net_bridge *br, 1828 bool getlink) 1829 { 1830 return -EOPNOTSUPP; 1831 } 1832 1833 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1834 { 1835 return -EOPNOTSUPP; 1836 } 1837 1838 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1839 { 1840 return -EOPNOTSUPP; 1841 } 1842 #endif 1843 1844 /* br_netlink.c */ 1845 extern struct rtnl_link_ops br_link_ops; 1846 int br_netlink_init(void); 1847 void br_netlink_fini(void); 1848 void br_ifinfo_notify(int event, const struct net_bridge *br, 1849 const struct net_bridge_port *port); 1850 void br_info_notify(int event, const struct net_bridge *br, 1851 const struct net_bridge_port *port, u32 filter); 1852 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1853 struct netlink_ext_ack *extack); 1854 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1855 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1856 u32 filter_mask, int nlflags); 1857 int br_process_vlan_info(struct net_bridge *br, 1858 struct net_bridge_port *p, int cmd, 1859 struct bridge_vlan_info *vinfo_curr, 1860 struct bridge_vlan_info **vinfo_last, 1861 bool *changed, 1862 struct netlink_ext_ack *extack); 1863 1864 #ifdef CONFIG_SYSFS 1865 /* br_sysfs_if.c */ 1866 extern const struct sysfs_ops brport_sysfs_ops; 1867 int br_sysfs_addif(struct net_bridge_port *p); 1868 int br_sysfs_renameif(struct net_bridge_port *p); 1869 1870 /* br_sysfs_br.c */ 1871 int br_sysfs_addbr(struct net_device *dev); 1872 void br_sysfs_delbr(struct net_device *dev); 1873 1874 #else 1875 1876 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1877 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1878 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1879 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1880 #endif /* CONFIG_SYSFS */ 1881 1882 /* br_switchdev.c */ 1883 #ifdef CONFIG_NET_SWITCHDEV 1884 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1885 1886 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1887 1888 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1889 struct sk_buff *skb); 1890 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1891 struct sk_buff *skb); 1892 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1893 struct sk_buff *skb); 1894 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1895 const struct sk_buff *skb); 1896 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1897 unsigned long flags, 1898 unsigned long mask, 1899 struct netlink_ext_ack *extack); 1900 void br_switchdev_fdb_notify(struct net_bridge *br, 1901 const struct net_bridge_fdb_entry *fdb, int type); 1902 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1903 struct netlink_ext_ack *extack); 1904 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1905 void br_switchdev_init(struct net_bridge *br); 1906 1907 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1908 { 1909 skb->offload_fwd_mark = 0; 1910 } 1911 #else 1912 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 1913 { 1914 return false; 1915 } 1916 1917 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 1918 { 1919 } 1920 1921 static inline void 1922 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1923 struct sk_buff *skb) 1924 { 1925 } 1926 1927 static inline void 1928 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1929 struct sk_buff *skb) 1930 { 1931 } 1932 1933 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1934 struct sk_buff *skb) 1935 { 1936 } 1937 1938 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1939 const struct sk_buff *skb) 1940 { 1941 return true; 1942 } 1943 1944 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1945 unsigned long flags, 1946 unsigned long mask, 1947 struct netlink_ext_ack *extack) 1948 { 1949 return 0; 1950 } 1951 1952 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1953 u16 vid, u16 flags, 1954 struct netlink_ext_ack *extack) 1955 { 1956 return -EOPNOTSUPP; 1957 } 1958 1959 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1960 { 1961 return -EOPNOTSUPP; 1962 } 1963 1964 static inline void 1965 br_switchdev_fdb_notify(struct net_bridge *br, 1966 const struct net_bridge_fdb_entry *fdb, int type) 1967 { 1968 } 1969 1970 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1971 { 1972 } 1973 1974 static inline void br_switchdev_init(struct net_bridge *br) 1975 { 1976 } 1977 1978 #endif /* CONFIG_NET_SWITCHDEV */ 1979 1980 /* br_arp_nd_proxy.c */ 1981 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1982 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1983 u16 vid, struct net_bridge_port *p); 1984 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1985 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1986 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1987 #endif 1988