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 #endif 396 u16 group_fwd_mask; 397 u16 backup_redirected_cnt; 398 399 struct bridge_stp_xstats stp_xstats; 400 }; 401 402 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 403 404 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 405 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 406 407 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 408 { 409 return rcu_dereference(dev->rx_handler_data); 410 } 411 412 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 413 { 414 return netif_is_bridge_port(dev) ? 415 rtnl_dereference(dev->rx_handler_data) : NULL; 416 } 417 418 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 419 { 420 return netif_is_bridge_port(dev) ? 421 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 422 } 423 424 enum net_bridge_opts { 425 BROPT_VLAN_ENABLED, 426 BROPT_VLAN_STATS_ENABLED, 427 BROPT_NF_CALL_IPTABLES, 428 BROPT_NF_CALL_IP6TABLES, 429 BROPT_NF_CALL_ARPTABLES, 430 BROPT_GROUP_ADDR_SET, 431 BROPT_MULTICAST_ENABLED, 432 BROPT_MULTICAST_QUERIER, 433 BROPT_MULTICAST_QUERY_USE_IFADDR, 434 BROPT_MULTICAST_STATS_ENABLED, 435 BROPT_HAS_IPV6_ADDR, 436 BROPT_NEIGH_SUPPRESS_ENABLED, 437 BROPT_MTU_SET_BY_USER, 438 BROPT_VLAN_STATS_PER_PORT, 439 BROPT_NO_LL_LEARN, 440 BROPT_VLAN_BRIDGE_BINDING, 441 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 442 }; 443 444 struct net_bridge { 445 spinlock_t lock; 446 spinlock_t hash_lock; 447 struct hlist_head frame_type_list; 448 struct net_device *dev; 449 unsigned long options; 450 /* These fields are accessed on each packet */ 451 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 452 __be16 vlan_proto; 453 u16 default_pvid; 454 struct net_bridge_vlan_group __rcu *vlgrp; 455 #endif 456 457 struct rhashtable fdb_hash_tbl; 458 struct list_head port_list; 459 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 460 union { 461 struct rtable fake_rtable; 462 struct rt6_info fake_rt6_info; 463 }; 464 #endif 465 u16 group_fwd_mask; 466 u16 group_fwd_mask_required; 467 468 /* STP */ 469 bridge_id designated_root; 470 bridge_id bridge_id; 471 unsigned char topology_change; 472 unsigned char topology_change_detected; 473 u16 root_port; 474 unsigned long max_age; 475 unsigned long hello_time; 476 unsigned long forward_delay; 477 unsigned long ageing_time; 478 unsigned long bridge_max_age; 479 unsigned long bridge_hello_time; 480 unsigned long bridge_forward_delay; 481 unsigned long bridge_ageing_time; 482 u32 root_path_cost; 483 484 u8 group_addr[ETH_ALEN]; 485 486 enum { 487 BR_NO_STP, /* no spanning tree */ 488 BR_KERNEL_STP, /* old STP in kernel */ 489 BR_USER_STP, /* new RSTP in userspace */ 490 } stp_enabled; 491 492 struct net_bridge_mcast multicast_ctx; 493 494 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 495 struct bridge_mcast_stats __percpu *mcast_stats; 496 497 u32 hash_max; 498 499 spinlock_t multicast_lock; 500 501 struct rhashtable mdb_hash_tbl; 502 struct rhashtable sg_port_tbl; 503 504 struct hlist_head mcast_gc_list; 505 struct hlist_head mdb_list; 506 507 struct work_struct mcast_gc_work; 508 #endif 509 510 struct timer_list hello_timer; 511 struct timer_list tcn_timer; 512 struct timer_list topology_change_timer; 513 struct delayed_work gc_work; 514 struct kobject *ifobj; 515 u32 auto_cnt; 516 517 #ifdef CONFIG_NET_SWITCHDEV 518 /* Counter used to make sure that hardware domains get unique 519 * identifiers in case a bridge spans multiple switchdev instances. 520 */ 521 int last_hwdom; 522 /* Bit mask of hardware domain numbers in use */ 523 unsigned long busy_hwdoms; 524 #endif 525 struct hlist_head fdb_list; 526 527 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 528 struct hlist_head mrp_list; 529 #endif 530 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 531 struct hlist_head mep_list; 532 #endif 533 }; 534 535 struct br_input_skb_cb { 536 struct net_device *brdev; 537 538 u16 frag_max_size; 539 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 540 u8 igmp; 541 u8 mrouters_only:1; 542 #endif 543 u8 proxyarp_replied:1; 544 u8 src_port_isolated:1; 545 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 546 u8 vlan_filtered:1; 547 #endif 548 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 549 u8 br_netfilter_broute:1; 550 #endif 551 552 #ifdef CONFIG_NET_SWITCHDEV 553 /* The switchdev hardware domain from which this packet was received. 554 * If skb->offload_fwd_mark was set, then this packet was already 555 * forwarded by hardware to the other ports in the source hardware 556 * domain, otherwise it wasn't. 557 */ 558 int src_hwdom; 559 #endif 560 }; 561 562 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 563 564 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 565 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 566 #else 567 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 568 #endif 569 570 #define br_printk(level, br, format, args...) \ 571 printk(level "%s: " format, (br)->dev->name, ##args) 572 573 #define br_err(__br, format, args...) \ 574 br_printk(KERN_ERR, __br, format, ##args) 575 #define br_warn(__br, format, args...) \ 576 br_printk(KERN_WARNING, __br, format, ##args) 577 #define br_notice(__br, format, args...) \ 578 br_printk(KERN_NOTICE, __br, format, ##args) 579 #define br_info(__br, format, args...) \ 580 br_printk(KERN_INFO, __br, format, ##args) 581 582 #define br_debug(br, format, args...) \ 583 pr_debug("%s: " format, (br)->dev->name, ##args) 584 585 /* called under bridge lock */ 586 static inline int br_is_root_bridge(const struct net_bridge *br) 587 { 588 return !memcmp(&br->bridge_id, &br->designated_root, 8); 589 } 590 591 /* check if a VLAN entry is global */ 592 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 593 { 594 return v->flags & BRIDGE_VLAN_INFO_MASTER; 595 } 596 597 /* check if a VLAN entry is used by the bridge */ 598 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 599 { 600 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 601 } 602 603 /* check if we should use the vlan entry, returns false if it's only context */ 604 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 605 { 606 if (br_vlan_is_master(v)) { 607 if (br_vlan_is_brentry(v)) 608 return true; 609 else 610 return false; 611 } 612 613 return true; 614 } 615 616 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 617 { 618 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 619 } 620 621 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 622 { 623 bool ret = vid > 0 && vid < VLAN_VID_MASK; 624 625 if (!ret) 626 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 627 628 return ret; 629 } 630 631 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 632 const struct bridge_vlan_info *last, 633 struct netlink_ext_ack *extack) 634 { 635 /* pvid flag is not allowed in ranges */ 636 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 637 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 638 return false; 639 } 640 641 /* when cur is the range end, check if: 642 * - it has range start flag 643 * - range ids are invalid (end is equal to or before start) 644 */ 645 if (last) { 646 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 647 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 648 return false; 649 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 650 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 651 return false; 652 } else if (cur->vid <= last->vid) { 653 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 654 return false; 655 } 656 } 657 658 /* check for required range flags */ 659 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 660 BRIDGE_VLAN_INFO_RANGE_END))) { 661 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 662 return false; 663 } 664 665 return true; 666 } 667 668 static inline int br_afspec_cmd_to_rtm(int cmd) 669 { 670 switch (cmd) { 671 case RTM_SETLINK: 672 return RTM_NEWVLAN; 673 case RTM_DELLINK: 674 return RTM_DELVLAN; 675 } 676 677 return 0; 678 } 679 680 static inline int br_opt_get(const struct net_bridge *br, 681 enum net_bridge_opts opt) 682 { 683 return test_bit(opt, &br->options); 684 } 685 686 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 687 struct netlink_ext_ack *extack); 688 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 689 int br_boolopt_multi_toggle(struct net_bridge *br, 690 struct br_boolopt_multi *bm, 691 struct netlink_ext_ack *extack); 692 void br_boolopt_multi_get(const struct net_bridge *br, 693 struct br_boolopt_multi *bm); 694 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 695 696 /* br_device.c */ 697 void br_dev_setup(struct net_device *dev); 698 void br_dev_delete(struct net_device *dev, struct list_head *list); 699 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 700 #ifdef CONFIG_NET_POLL_CONTROLLER 701 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 702 struct sk_buff *skb) 703 { 704 netpoll_send_skb(p->np, skb); 705 } 706 707 int br_netpoll_enable(struct net_bridge_port *p); 708 void br_netpoll_disable(struct net_bridge_port *p); 709 #else 710 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 711 struct sk_buff *skb) 712 { 713 } 714 715 static inline int br_netpoll_enable(struct net_bridge_port *p) 716 { 717 return 0; 718 } 719 720 static inline void br_netpoll_disable(struct net_bridge_port *p) 721 { 722 } 723 #endif 724 725 /* br_fdb.c */ 726 int br_fdb_init(void); 727 void br_fdb_fini(void); 728 int br_fdb_hash_init(struct net_bridge *br); 729 void br_fdb_hash_fini(struct net_bridge *br); 730 void br_fdb_flush(struct net_bridge *br); 731 void br_fdb_find_delete_local(struct net_bridge *br, 732 const struct net_bridge_port *p, 733 const unsigned char *addr, u16 vid); 734 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 735 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 736 void br_fdb_cleanup(struct work_struct *work); 737 void br_fdb_delete_by_port(struct net_bridge *br, 738 const struct net_bridge_port *p, u16 vid, int do_all); 739 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 740 const unsigned char *addr, 741 __u16 vid); 742 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 743 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 744 unsigned long off); 745 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 746 const unsigned char *addr, u16 vid); 747 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 748 const unsigned char *addr, u16 vid, unsigned long flags); 749 750 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 751 struct net_device *dev, const unsigned char *addr, u16 vid); 752 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 753 const unsigned char *addr, u16 vid, u16 nlh_flags, 754 struct netlink_ext_ack *extack); 755 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 756 struct net_device *dev, struct net_device *fdev, int *idx); 757 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 758 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 759 struct netlink_ext_ack *extack); 760 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 761 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 762 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 763 const unsigned char *addr, u16 vid, 764 bool swdev_notify); 765 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 766 const unsigned char *addr, u16 vid, 767 bool swdev_notify); 768 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 769 const unsigned char *addr, u16 vid, bool offloaded); 770 771 /* br_forward.c */ 772 enum br_pkt_type { 773 BR_PKT_UNICAST, 774 BR_PKT_MULTICAST, 775 BR_PKT_BROADCAST 776 }; 777 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 778 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 779 bool local_rcv, bool local_orig); 780 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 781 void br_flood(struct net_bridge *br, struct sk_buff *skb, 782 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 783 784 /* return true if both source port and dest port are isolated */ 785 static inline bool br_skb_isolated(const struct net_bridge_port *to, 786 const struct sk_buff *skb) 787 { 788 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 789 (to->flags & BR_ISOLATED); 790 } 791 792 /* br_if.c */ 793 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 794 int br_add_bridge(struct net *net, const char *name); 795 int br_del_bridge(struct net *net, const char *name); 796 int br_add_if(struct net_bridge *br, struct net_device *dev, 797 struct netlink_ext_ack *extack); 798 int br_del_if(struct net_bridge *br, struct net_device *dev); 799 void br_mtu_auto_adjust(struct net_bridge *br); 800 netdev_features_t br_features_recompute(struct net_bridge *br, 801 netdev_features_t features); 802 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 803 void br_manage_promisc(struct net_bridge *br); 804 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 805 806 /* br_input.c */ 807 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 808 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 809 810 struct br_frame_type { 811 __be16 type; 812 int (*frame_handler)(struct net_bridge_port *port, 813 struct sk_buff *skb); 814 struct hlist_node list; 815 }; 816 817 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 818 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 819 820 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 821 { 822 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 823 } 824 825 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 826 { 827 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 828 } 829 830 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 831 { 832 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 833 } 834 835 static inline struct net_bridge_port * 836 br_port_get_check_rtnl(const struct net_device *dev) 837 { 838 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 839 } 840 841 /* br_ioctl.c */ 842 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 843 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, 844 void __user *arg); 845 846 /* br_multicast.c */ 847 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 848 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 849 struct net_bridge_mcast_port **pmctx, 850 struct net_bridge_vlan *vlan, 851 struct sk_buff *skb, u16 vid); 852 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 853 struct sk_buff *skb, u16 vid); 854 int br_multicast_add_port(struct net_bridge_port *port); 855 void br_multicast_del_port(struct net_bridge_port *port); 856 void br_multicast_enable_port(struct net_bridge_port *port); 857 void br_multicast_disable_port(struct net_bridge_port *port); 858 void br_multicast_init(struct net_bridge *br); 859 void br_multicast_join_snoopers(struct net_bridge *br); 860 void br_multicast_leave_snoopers(struct net_bridge *br); 861 void br_multicast_open(struct net_bridge *br); 862 void br_multicast_stop(struct net_bridge *br); 863 void br_multicast_dev_del(struct net_bridge *br); 864 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 865 struct net_bridge_mcast *brmctx, 866 bool local_rcv, bool local_orig); 867 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 868 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 869 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 870 struct netlink_ext_ack *extack); 871 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 872 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 873 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val); 874 #if IS_ENABLED(CONFIG_IPV6) 875 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val); 876 #endif 877 struct net_bridge_mdb_entry * 878 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 879 struct net_bridge_mdb_entry * 880 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 881 struct net_bridge_port_group * 882 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 883 struct net_bridge_port_group __rcu *next, 884 unsigned char flags, const unsigned char *src, 885 u8 filter_mode, u8 rt_protocol); 886 int br_mdb_hash_init(struct net_bridge *br); 887 void br_mdb_hash_fini(struct net_bridge *br); 888 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 889 struct net_bridge_port_group *pg, int type); 890 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 891 int type); 892 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 893 struct net_bridge_port_group *pg, 894 struct net_bridge_port_group __rcu **pp); 895 void br_multicast_count(struct net_bridge *br, 896 const struct net_bridge_port *p, 897 const struct sk_buff *skb, u8 type, u8 dir); 898 int br_multicast_init_stats(struct net_bridge *br); 899 void br_multicast_uninit_stats(struct net_bridge *br); 900 void br_multicast_get_stats(const struct net_bridge *br, 901 const struct net_bridge_port *p, 902 struct br_mcast_stats *dest); 903 void br_mdb_init(void); 904 void br_mdb_uninit(void); 905 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 906 struct net_bridge_mdb_entry *mp, bool notify); 907 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 908 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 909 u8 filter_mode); 910 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 911 struct net_bridge_port_group *sg); 912 struct net_bridge_group_src * 913 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 914 void br_multicast_del_group_src(struct net_bridge_group_src *src, 915 bool fastleave); 916 void br_multicast_ctx_init(struct net_bridge *br, 917 struct net_bridge_vlan *vlan, 918 struct net_bridge_mcast *brmctx); 919 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 920 void br_multicast_port_ctx_init(struct net_bridge_port *port, 921 struct net_bridge_vlan *vlan, 922 struct net_bridge_mcast_port *pmctx); 923 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 924 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 925 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 926 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 927 struct netlink_ext_ack *extack); 928 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 929 930 static inline bool br_group_is_l2(const struct br_ip *group) 931 { 932 return group->proto == 0; 933 } 934 935 #define mlock_dereference(X, br) \ 936 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 937 938 static inline struct hlist_node * 939 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 940 struct sk_buff *skb) 941 { 942 #if IS_ENABLED(CONFIG_IPV6) 943 if (skb->protocol == htons(ETH_P_IPV6)) 944 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 945 #endif 946 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 947 } 948 949 static inline struct net_bridge_port * 950 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 951 { 952 struct net_bridge_mcast_port *mctx; 953 954 #if IS_ENABLED(CONFIG_IPV6) 955 if (skb->protocol == htons(ETH_P_IPV6)) 956 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 957 ip6_rlist); 958 else 959 #endif 960 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 961 ip4_rlist); 962 963 if (mctx) 964 return mctx->port; 965 else 966 return NULL; 967 } 968 969 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 970 { 971 return timer_pending(&brmctx->ip4_mc_router_timer); 972 } 973 974 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 975 { 976 #if IS_ENABLED(CONFIG_IPV6) 977 return timer_pending(&brmctx->ip6_mc_router_timer); 978 #else 979 return false; 980 #endif 981 } 982 983 static inline bool 984 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 985 { 986 switch (brmctx->multicast_router) { 987 case MDB_RTR_TYPE_PERM: 988 return true; 989 case MDB_RTR_TYPE_TEMP_QUERY: 990 if (skb) { 991 if (skb->protocol == htons(ETH_P_IP)) 992 return br_ip4_multicast_is_router(brmctx); 993 else if (skb->protocol == htons(ETH_P_IPV6)) 994 return br_ip6_multicast_is_router(brmctx); 995 } else { 996 return br_ip4_multicast_is_router(brmctx) || 997 br_ip6_multicast_is_router(brmctx); 998 } 999 fallthrough; 1000 default: 1001 return false; 1002 } 1003 } 1004 1005 static inline bool 1006 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1007 struct bridge_mcast_other_query *querier, 1008 const bool is_ipv6) 1009 { 1010 bool own_querier_enabled; 1011 1012 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 1013 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1014 own_querier_enabled = false; 1015 else 1016 own_querier_enabled = true; 1017 } else { 1018 own_querier_enabled = false; 1019 } 1020 1021 return time_is_before_jiffies(querier->delay_time) && 1022 (own_querier_enabled || timer_pending(&querier->timer)); 1023 } 1024 1025 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1026 struct ethhdr *eth, 1027 const struct net_bridge_mdb_entry *mdb) 1028 { 1029 switch (eth->h_proto) { 1030 case (htons(ETH_P_IP)): 1031 return __br_multicast_querier_exists(brmctx, 1032 &brmctx->ip4_other_query, false); 1033 #if IS_ENABLED(CONFIG_IPV6) 1034 case (htons(ETH_P_IPV6)): 1035 return __br_multicast_querier_exists(brmctx, 1036 &brmctx->ip6_other_query, true); 1037 #endif 1038 default: 1039 return !!mdb && br_group_is_l2(&mdb->addr); 1040 } 1041 } 1042 1043 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1044 { 1045 switch (ip->proto) { 1046 case htons(ETH_P_IP): 1047 return ipv4_is_zeronet(ip->src.ip4); 1048 #if IS_ENABLED(CONFIG_IPV6) 1049 case htons(ETH_P_IPV6): 1050 return ipv6_addr_any(&ip->src.ip6); 1051 #endif 1052 default: 1053 return false; 1054 } 1055 } 1056 1057 static inline bool 1058 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1059 __be16 proto) 1060 { 1061 switch (proto) { 1062 case htons(ETH_P_IP): 1063 return !!(brmctx->multicast_igmp_version == 3); 1064 #if IS_ENABLED(CONFIG_IPV6) 1065 case htons(ETH_P_IPV6): 1066 return !!(brmctx->multicast_mld_version == 2); 1067 #endif 1068 default: 1069 return false; 1070 } 1071 } 1072 1073 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1074 { 1075 return BR_INPUT_SKB_CB(skb)->igmp; 1076 } 1077 1078 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1079 { 1080 return brmctx->multicast_last_member_interval * 1081 brmctx->multicast_last_member_count; 1082 } 1083 1084 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1085 { 1086 /* use the RFC default of 2 for QRV */ 1087 return 2 * brmctx->multicast_query_interval + 1088 brmctx->multicast_query_response_interval; 1089 } 1090 1091 static inline bool 1092 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1093 { 1094 return !!brmctx->vlan; 1095 } 1096 1097 static inline bool 1098 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1099 { 1100 return !!pmctx->vlan; 1101 } 1102 1103 static inline struct net_bridge_mcast * 1104 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1105 { 1106 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1107 return &pmctx->port->br->multicast_ctx; 1108 else 1109 return &pmctx->vlan->brvlan->br_mcast_ctx; 1110 } 1111 1112 static inline bool 1113 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1114 { 1115 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1116 br_multicast_ctx_is_vlan(brmctx) && 1117 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1118 } 1119 1120 static inline bool 1121 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1122 { 1123 return br_multicast_ctx_is_vlan(brmctx) && 1124 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1125 } 1126 1127 static inline bool 1128 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1129 { 1130 return br_multicast_port_ctx_is_vlan(pmctx) && 1131 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1132 } 1133 1134 static inline bool 1135 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1136 { 1137 return pmctx->port->state == BR_STATE_DISABLED || 1138 (br_multicast_port_ctx_is_vlan(pmctx) && 1139 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1140 pmctx->vlan->state == BR_STATE_DISABLED)); 1141 } 1142 1143 static inline bool 1144 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1145 { 1146 return br_multicast_port_ctx_state_disabled(pmctx) || 1147 pmctx->port->state == BR_STATE_BLOCKING || 1148 (br_multicast_port_ctx_is_vlan(pmctx) && 1149 pmctx->vlan->state == BR_STATE_BLOCKING); 1150 } 1151 #else 1152 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1153 struct net_bridge_mcast_port **pmctx, 1154 struct net_bridge_vlan *vlan, 1155 struct sk_buff *skb, 1156 u16 vid) 1157 { 1158 return 0; 1159 } 1160 1161 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1162 struct sk_buff *skb, u16 vid) 1163 { 1164 return NULL; 1165 } 1166 1167 static inline int br_multicast_add_port(struct net_bridge_port *port) 1168 { 1169 return 0; 1170 } 1171 1172 static inline void br_multicast_del_port(struct net_bridge_port *port) 1173 { 1174 } 1175 1176 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1177 { 1178 } 1179 1180 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1181 { 1182 } 1183 1184 static inline void br_multicast_init(struct net_bridge *br) 1185 { 1186 } 1187 1188 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1189 { 1190 } 1191 1192 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1193 { 1194 } 1195 1196 static inline void br_multicast_open(struct net_bridge *br) 1197 { 1198 } 1199 1200 static inline void br_multicast_stop(struct net_bridge *br) 1201 { 1202 } 1203 1204 static inline void br_multicast_dev_del(struct net_bridge *br) 1205 { 1206 } 1207 1208 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1209 struct sk_buff *skb, 1210 struct net_bridge_mcast *brmctx, 1211 bool local_rcv, bool local_orig) 1212 { 1213 } 1214 1215 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1216 struct sk_buff *skb) 1217 { 1218 return false; 1219 } 1220 1221 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1222 struct ethhdr *eth, 1223 const struct net_bridge_mdb_entry *mdb) 1224 { 1225 return false; 1226 } 1227 1228 static inline void br_mdb_init(void) 1229 { 1230 } 1231 1232 static inline void br_mdb_uninit(void) 1233 { 1234 } 1235 1236 static inline int br_mdb_hash_init(struct net_bridge *br) 1237 { 1238 return 0; 1239 } 1240 1241 static inline void br_mdb_hash_fini(struct net_bridge *br) 1242 { 1243 } 1244 1245 static inline void br_multicast_count(struct net_bridge *br, 1246 const struct net_bridge_port *p, 1247 const struct sk_buff *skb, 1248 u8 type, u8 dir) 1249 { 1250 } 1251 1252 static inline int br_multicast_init_stats(struct net_bridge *br) 1253 { 1254 return 0; 1255 } 1256 1257 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1258 { 1259 } 1260 1261 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1262 { 1263 return 0; 1264 } 1265 1266 static inline void br_multicast_ctx_init(struct net_bridge *br, 1267 struct net_bridge_vlan *vlan, 1268 struct net_bridge_mcast *brmctx) 1269 { 1270 } 1271 1272 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1273 { 1274 } 1275 1276 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1277 struct net_bridge_vlan *vlan, 1278 struct net_bridge_mcast_port *pmctx) 1279 { 1280 } 1281 1282 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1283 { 1284 } 1285 1286 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1287 bool on) 1288 { 1289 } 1290 1291 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1292 bool on) 1293 { 1294 } 1295 1296 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1297 bool on, 1298 struct netlink_ext_ack *extack) 1299 { 1300 return -EOPNOTSUPP; 1301 } 1302 1303 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1304 bool on) 1305 { 1306 return false; 1307 } 1308 #endif 1309 1310 /* br_vlan.c */ 1311 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1312 bool br_allowed_ingress(const struct net_bridge *br, 1313 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1314 u16 *vid, u8 *state, 1315 struct net_bridge_vlan **vlan); 1316 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1317 const struct sk_buff *skb); 1318 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1319 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1320 const struct net_bridge_port *port, 1321 struct net_bridge_vlan_group *vg, 1322 struct sk_buff *skb); 1323 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1324 bool *changed, struct netlink_ext_ack *extack); 1325 int br_vlan_delete(struct net_bridge *br, u16 vid); 1326 void br_vlan_flush(struct net_bridge *br); 1327 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1328 void br_recalculate_fwd_mask(struct net_bridge *br); 1329 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1330 struct netlink_ext_ack *extack); 1331 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1332 struct netlink_ext_ack *extack); 1333 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1334 struct netlink_ext_ack *extack); 1335 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1336 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1337 int br_vlan_init(struct net_bridge *br); 1338 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1339 struct netlink_ext_ack *extack); 1340 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1341 struct netlink_ext_ack *extack); 1342 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1343 bool *changed, struct netlink_ext_ack *extack); 1344 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1345 void nbp_vlan_flush(struct net_bridge_port *port); 1346 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1347 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1348 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1349 struct pcpu_sw_netstats *stats); 1350 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1351 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1352 void *ptr); 1353 void br_vlan_rtnl_init(void); 1354 void br_vlan_rtnl_uninit(void); 1355 void br_vlan_notify(const struct net_bridge *br, 1356 const struct net_bridge_port *p, 1357 u16 vid, u16 vid_range, 1358 int cmd); 1359 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1360 const struct net_bridge_vlan *range_end); 1361 1362 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1363 struct net_device_path_ctx *ctx, 1364 struct net_device_path *path); 1365 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1366 struct net_bridge_port *dst, 1367 struct net_device_path *path); 1368 1369 static inline struct net_bridge_vlan_group *br_vlan_group( 1370 const struct net_bridge *br) 1371 { 1372 return rtnl_dereference(br->vlgrp); 1373 } 1374 1375 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1376 const struct net_bridge_port *p) 1377 { 1378 return rtnl_dereference(p->vlgrp); 1379 } 1380 1381 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1382 const struct net_bridge *br) 1383 { 1384 return rcu_dereference(br->vlgrp); 1385 } 1386 1387 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1388 const struct net_bridge_port *p) 1389 { 1390 return rcu_dereference(p->vlgrp); 1391 } 1392 1393 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1394 * skb, the vlan tag will always be present if the frame was tagged. 1395 */ 1396 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1397 { 1398 int err = 0; 1399 1400 if (skb_vlan_tag_present(skb)) { 1401 *vid = skb_vlan_tag_get_id(skb); 1402 } else { 1403 *vid = 0; 1404 err = -EINVAL; 1405 } 1406 1407 return err; 1408 } 1409 1410 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1411 { 1412 if (!vg) 1413 return 0; 1414 1415 smp_rmb(); 1416 return vg->pvid; 1417 } 1418 1419 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1420 { 1421 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1422 } 1423 #else 1424 static inline bool br_allowed_ingress(const struct net_bridge *br, 1425 struct net_bridge_vlan_group *vg, 1426 struct sk_buff *skb, 1427 u16 *vid, u8 *state, 1428 struct net_bridge_vlan **vlan) 1429 1430 { 1431 *vlan = NULL; 1432 return true; 1433 } 1434 1435 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1436 const struct sk_buff *skb) 1437 { 1438 return true; 1439 } 1440 1441 static inline bool br_should_learn(struct net_bridge_port *p, 1442 struct sk_buff *skb, u16 *vid) 1443 { 1444 return true; 1445 } 1446 1447 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1448 const struct net_bridge_port *port, 1449 struct net_bridge_vlan_group *vg, 1450 struct sk_buff *skb) 1451 { 1452 return skb; 1453 } 1454 1455 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1456 bool *changed, struct netlink_ext_ack *extack) 1457 { 1458 *changed = false; 1459 return -EOPNOTSUPP; 1460 } 1461 1462 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1463 { 1464 return -EOPNOTSUPP; 1465 } 1466 1467 static inline void br_vlan_flush(struct net_bridge *br) 1468 { 1469 } 1470 1471 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1472 { 1473 } 1474 1475 static inline int br_vlan_init(struct net_bridge *br) 1476 { 1477 return 0; 1478 } 1479 1480 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1481 bool *changed, struct netlink_ext_ack *extack) 1482 { 1483 *changed = false; 1484 return -EOPNOTSUPP; 1485 } 1486 1487 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1488 { 1489 return -EOPNOTSUPP; 1490 } 1491 1492 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1493 { 1494 } 1495 1496 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1497 u16 vid) 1498 { 1499 return NULL; 1500 } 1501 1502 static inline int nbp_vlan_init(struct net_bridge_port *port, 1503 struct netlink_ext_ack *extack) 1504 { 1505 return 0; 1506 } 1507 1508 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1509 { 1510 return 0; 1511 } 1512 1513 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1514 { 1515 return 0; 1516 } 1517 1518 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1519 unsigned long val, 1520 struct netlink_ext_ack *extack) 1521 { 1522 return -EOPNOTSUPP; 1523 } 1524 1525 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1526 u32 filter_mask) 1527 { 1528 return 0; 1529 } 1530 1531 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1532 struct net_device_path_ctx *ctx, 1533 struct net_device_path *path) 1534 { 1535 } 1536 1537 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1538 struct net_bridge_port *dst, 1539 struct net_device_path *path) 1540 { 1541 return 0; 1542 } 1543 1544 static inline struct net_bridge_vlan_group *br_vlan_group( 1545 const struct net_bridge *br) 1546 { 1547 return NULL; 1548 } 1549 1550 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1551 const struct net_bridge_port *p) 1552 { 1553 return NULL; 1554 } 1555 1556 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1557 const struct net_bridge *br) 1558 { 1559 return NULL; 1560 } 1561 1562 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1563 const struct net_bridge_port *p) 1564 { 1565 return NULL; 1566 } 1567 1568 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1569 struct pcpu_sw_netstats *stats) 1570 { 1571 } 1572 1573 static inline void br_vlan_port_event(struct net_bridge_port *p, 1574 unsigned long event) 1575 { 1576 } 1577 1578 static inline int br_vlan_bridge_event(struct net_device *dev, 1579 unsigned long event, void *ptr) 1580 { 1581 return 0; 1582 } 1583 1584 static inline void br_vlan_rtnl_init(void) 1585 { 1586 } 1587 1588 static inline void br_vlan_rtnl_uninit(void) 1589 { 1590 } 1591 1592 static inline void br_vlan_notify(const struct net_bridge *br, 1593 const struct net_bridge_port *p, 1594 u16 vid, u16 vid_range, 1595 int cmd) 1596 { 1597 } 1598 1599 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1600 const struct net_bridge_vlan *range_end) 1601 { 1602 return true; 1603 } 1604 #endif 1605 1606 /* br_vlan_options.c */ 1607 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1608 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1609 const struct net_bridge_vlan *range_end); 1610 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1611 size_t br_vlan_opts_nl_size(void); 1612 int br_vlan_process_options(const struct net_bridge *br, 1613 const struct net_bridge_port *p, 1614 struct net_bridge_vlan *range_start, 1615 struct net_bridge_vlan *range_end, 1616 struct nlattr **tb, 1617 struct netlink_ext_ack *extack); 1618 int br_vlan_rtm_process_global_options(struct net_device *dev, 1619 const struct nlattr *attr, 1620 int cmd, 1621 struct netlink_ext_ack *extack); 1622 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1623 const struct net_bridge_vlan *r_end); 1624 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1625 const struct net_bridge_vlan *v_opts); 1626 1627 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1628 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1629 { 1630 return READ_ONCE(v->state); 1631 } 1632 1633 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1634 { 1635 WRITE_ONCE(v->state, state); 1636 } 1637 1638 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1639 { 1640 return READ_ONCE(vg->pvid_state); 1641 } 1642 1643 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1644 u8 state) 1645 { 1646 WRITE_ONCE(vg->pvid_state, state); 1647 } 1648 1649 /* learn_allow is true at ingress and false at egress */ 1650 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1651 { 1652 switch (state) { 1653 case BR_STATE_LEARNING: 1654 return learn_allow; 1655 case BR_STATE_FORWARDING: 1656 return true; 1657 default: 1658 return false; 1659 } 1660 } 1661 #endif 1662 1663 struct nf_br_ops { 1664 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1665 }; 1666 extern const struct nf_br_ops __rcu *nf_br_ops; 1667 1668 /* br_netfilter.c */ 1669 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1670 int br_nf_core_init(void); 1671 void br_nf_core_fini(void); 1672 void br_netfilter_rtable_init(struct net_bridge *); 1673 #else 1674 static inline int br_nf_core_init(void) { return 0; } 1675 static inline void br_nf_core_fini(void) {} 1676 #define br_netfilter_rtable_init(x) 1677 #endif 1678 1679 /* br_stp.c */ 1680 void br_set_state(struct net_bridge_port *p, unsigned int state); 1681 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1682 void br_init_port(struct net_bridge_port *p); 1683 void br_become_designated_port(struct net_bridge_port *p); 1684 1685 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1686 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1687 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1688 int br_set_max_age(struct net_bridge *br, unsigned long x); 1689 int __set_ageing_time(struct net_device *dev, unsigned long t); 1690 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1691 1692 1693 /* br_stp_if.c */ 1694 void br_stp_enable_bridge(struct net_bridge *br); 1695 void br_stp_disable_bridge(struct net_bridge *br); 1696 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1697 struct netlink_ext_ack *extack); 1698 void br_stp_enable_port(struct net_bridge_port *p); 1699 void br_stp_disable_port(struct net_bridge_port *p); 1700 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1701 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1702 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1703 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1704 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1705 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1706 1707 /* br_stp_bpdu.c */ 1708 struct stp_proto; 1709 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1710 struct net_device *dev); 1711 1712 /* br_stp_timer.c */ 1713 void br_stp_timer_init(struct net_bridge *br); 1714 void br_stp_port_timer_init(struct net_bridge_port *p); 1715 unsigned long br_timer_value(const struct timer_list *timer); 1716 1717 /* br.c */ 1718 #if IS_ENABLED(CONFIG_ATM_LANE) 1719 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1720 #endif 1721 1722 /* br_mrp.c */ 1723 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1724 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1725 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1726 bool br_mrp_enabled(struct net_bridge *br); 1727 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1728 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1729 #else 1730 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1731 struct nlattr *attr, int cmd, 1732 struct netlink_ext_ack *extack) 1733 { 1734 return -EOPNOTSUPP; 1735 } 1736 1737 static inline bool br_mrp_enabled(struct net_bridge *br) 1738 { 1739 return false; 1740 } 1741 1742 static inline void br_mrp_port_del(struct net_bridge *br, 1743 struct net_bridge_port *p) 1744 { 1745 } 1746 1747 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1748 { 1749 return 0; 1750 } 1751 1752 #endif 1753 1754 /* br_cfm.c */ 1755 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1756 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1757 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1758 bool br_cfm_created(struct net_bridge *br); 1759 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1760 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1761 int br_cfm_status_fill_info(struct sk_buff *skb, 1762 struct net_bridge *br, 1763 bool getlink); 1764 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1765 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1766 #else 1767 static inline int br_cfm_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_cfm_created(struct net_bridge *br) 1775 { 1776 return false; 1777 } 1778 1779 static inline void br_cfm_port_del(struct net_bridge *br, 1780 struct net_bridge_port *p) 1781 { 1782 } 1783 1784 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1785 { 1786 return -EOPNOTSUPP; 1787 } 1788 1789 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1790 struct net_bridge *br, 1791 bool getlink) 1792 { 1793 return -EOPNOTSUPP; 1794 } 1795 1796 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1797 { 1798 return -EOPNOTSUPP; 1799 } 1800 1801 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1802 { 1803 return -EOPNOTSUPP; 1804 } 1805 #endif 1806 1807 /* br_netlink.c */ 1808 extern struct rtnl_link_ops br_link_ops; 1809 int br_netlink_init(void); 1810 void br_netlink_fini(void); 1811 void br_ifinfo_notify(int event, const struct net_bridge *br, 1812 const struct net_bridge_port *port); 1813 void br_info_notify(int event, const struct net_bridge *br, 1814 const struct net_bridge_port *port, u32 filter); 1815 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1816 struct netlink_ext_ack *extack); 1817 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1818 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1819 u32 filter_mask, int nlflags); 1820 int br_process_vlan_info(struct net_bridge *br, 1821 struct net_bridge_port *p, int cmd, 1822 struct bridge_vlan_info *vinfo_curr, 1823 struct bridge_vlan_info **vinfo_last, 1824 bool *changed, 1825 struct netlink_ext_ack *extack); 1826 1827 #ifdef CONFIG_SYSFS 1828 /* br_sysfs_if.c */ 1829 extern const struct sysfs_ops brport_sysfs_ops; 1830 int br_sysfs_addif(struct net_bridge_port *p); 1831 int br_sysfs_renameif(struct net_bridge_port *p); 1832 1833 /* br_sysfs_br.c */ 1834 int br_sysfs_addbr(struct net_device *dev); 1835 void br_sysfs_delbr(struct net_device *dev); 1836 1837 #else 1838 1839 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1840 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1841 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1842 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1843 #endif /* CONFIG_SYSFS */ 1844 1845 /* br_switchdev.c */ 1846 #ifdef CONFIG_NET_SWITCHDEV 1847 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1848 struct sk_buff *skb); 1849 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1850 const struct sk_buff *skb); 1851 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1852 unsigned long flags, 1853 unsigned long mask, 1854 struct netlink_ext_ack *extack); 1855 void br_switchdev_fdb_notify(struct net_bridge *br, 1856 const struct net_bridge_fdb_entry *fdb, int type); 1857 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1858 struct netlink_ext_ack *extack); 1859 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1860 int nbp_switchdev_add(struct net_bridge_port *p); 1861 void nbp_switchdev_del(struct net_bridge_port *p); 1862 void br_switchdev_init(struct net_bridge *br); 1863 1864 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1865 { 1866 skb->offload_fwd_mark = 0; 1867 } 1868 #else 1869 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1870 struct sk_buff *skb) 1871 { 1872 } 1873 1874 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1875 const struct sk_buff *skb) 1876 { 1877 return true; 1878 } 1879 1880 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 1881 unsigned long flags, 1882 unsigned long mask, 1883 struct netlink_ext_ack *extack) 1884 { 1885 return 0; 1886 } 1887 1888 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 1889 u16 vid, u16 flags, 1890 struct netlink_ext_ack *extack) 1891 { 1892 return -EOPNOTSUPP; 1893 } 1894 1895 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 1896 { 1897 return -EOPNOTSUPP; 1898 } 1899 1900 static inline void 1901 br_switchdev_fdb_notify(struct net_bridge *br, 1902 const struct net_bridge_fdb_entry *fdb, int type) 1903 { 1904 } 1905 1906 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1907 { 1908 } 1909 1910 static inline int nbp_switchdev_add(struct net_bridge_port *p) 1911 { 1912 return 0; 1913 } 1914 1915 static inline void nbp_switchdev_del(struct net_bridge_port *p) 1916 { 1917 } 1918 1919 static inline void br_switchdev_init(struct net_bridge *br) 1920 { 1921 } 1922 1923 #endif /* CONFIG_NET_SWITCHDEV */ 1924 1925 /* br_arp_nd_proxy.c */ 1926 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 1927 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 1928 u16 vid, struct net_bridge_port *p); 1929 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 1930 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 1931 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 1932 #endif 1933