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 int port_ifidx; 85 seqcount_spinlock_t seq; 86 }; 87 88 /* IGMP/MLD statistics */ 89 struct bridge_mcast_stats { 90 struct br_mcast_stats mstats; 91 struct u64_stats_sync syncp; 92 }; 93 #endif 94 95 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 96 struct net_bridge_mcast_port { 97 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 98 struct net_bridge_port *port; 99 struct net_bridge_vlan *vlan; 100 101 struct bridge_mcast_own_query ip4_own_query; 102 struct timer_list ip4_mc_router_timer; 103 struct hlist_node ip4_rlist; 104 #if IS_ENABLED(CONFIG_IPV6) 105 struct bridge_mcast_own_query ip6_own_query; 106 struct timer_list ip6_mc_router_timer; 107 struct hlist_node ip6_rlist; 108 #endif /* IS_ENABLED(CONFIG_IPV6) */ 109 unsigned char multicast_router; 110 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 111 }; 112 113 /* net_bridge_mcast must be always defined due to forwarding stubs */ 114 struct net_bridge_mcast { 115 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 116 struct net_bridge *br; 117 struct net_bridge_vlan *vlan; 118 119 u32 multicast_last_member_count; 120 u32 multicast_startup_query_count; 121 122 u8 multicast_querier; 123 u8 multicast_igmp_version; 124 u8 multicast_router; 125 #if IS_ENABLED(CONFIG_IPV6) 126 u8 multicast_mld_version; 127 #endif 128 unsigned long multicast_last_member_interval; 129 unsigned long multicast_membership_interval; 130 unsigned long multicast_querier_interval; 131 unsigned long multicast_query_interval; 132 unsigned long multicast_query_response_interval; 133 unsigned long multicast_startup_query_interval; 134 struct hlist_head ip4_mc_router_list; 135 struct timer_list ip4_mc_router_timer; 136 struct bridge_mcast_other_query ip4_other_query; 137 struct bridge_mcast_own_query ip4_own_query; 138 struct bridge_mcast_querier ip4_querier; 139 #if IS_ENABLED(CONFIG_IPV6) 140 struct hlist_head ip6_mc_router_list; 141 struct timer_list ip6_mc_router_timer; 142 struct bridge_mcast_other_query ip6_other_query; 143 struct bridge_mcast_own_query ip6_own_query; 144 struct bridge_mcast_querier ip6_querier; 145 #endif /* IS_ENABLED(CONFIG_IPV6) */ 146 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 147 }; 148 149 struct br_tunnel_info { 150 __be64 tunnel_id; 151 struct metadata_dst __rcu *tunnel_dst; 152 }; 153 154 /* private vlan flags */ 155 enum { 156 BR_VLFLAG_PER_PORT_STATS = BIT(0), 157 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 158 BR_VLFLAG_MCAST_ENABLED = BIT(2), 159 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 160 }; 161 162 /** 163 * struct net_bridge_vlan - per-vlan entry 164 * 165 * @vnode: rhashtable member 166 * @vid: VLAN id 167 * @flags: bridge vlan flags 168 * @priv_flags: private (in-kernel) bridge vlan flags 169 * @state: STP state (e.g. blocking, learning, forwarding) 170 * @stats: per-cpu VLAN statistics 171 * @br: if MASTER flag set, this points to a bridge struct 172 * @port: if MASTER flag unset, this points to a port struct 173 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 174 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 175 * for this VLAN entry 176 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 177 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 178 * context 179 * @vlist: sorted list of VLAN entries 180 * @rcu: used for entry destruction 181 * 182 * This structure is shared between the global per-VLAN entries contained in 183 * the bridge rhashtable and the local per-port per-VLAN entries contained in 184 * the port's rhashtable. The union entries should be interpreted depending on 185 * the entry flags that are set. 186 */ 187 struct net_bridge_vlan { 188 struct rhash_head vnode; 189 struct rhash_head tnode; 190 u16 vid; 191 u16 flags; 192 u16 priv_flags; 193 u8 state; 194 struct pcpu_sw_netstats __percpu *stats; 195 union { 196 struct net_bridge *br; 197 struct net_bridge_port *port; 198 }; 199 union { 200 refcount_t refcnt; 201 struct net_bridge_vlan *brvlan; 202 }; 203 204 struct br_tunnel_info tinfo; 205 206 union { 207 struct net_bridge_mcast br_mcast_ctx; 208 struct net_bridge_mcast_port port_mcast_ctx; 209 }; 210 211 struct list_head vlist; 212 213 struct rcu_head rcu; 214 }; 215 216 /** 217 * struct net_bridge_vlan_group 218 * 219 * @vlan_hash: VLAN entry rhashtable 220 * @vlan_list: sorted VLAN entry list 221 * @num_vlans: number of total VLAN entries 222 * @pvid: PVID VLAN id 223 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 224 * 225 * IMPORTANT: Be careful when checking if there're VLAN entries using list 226 * primitives because the bridge can have entries in its list which 227 * are just for global context but not for filtering, i.e. they have 228 * the master flag set but not the brentry flag. If you have to check 229 * if there're "real" entries in the bridge please test @num_vlans 230 */ 231 struct net_bridge_vlan_group { 232 struct rhashtable vlan_hash; 233 struct rhashtable tunnel_hash; 234 struct list_head vlan_list; 235 u16 num_vlans; 236 u16 pvid; 237 u8 pvid_state; 238 }; 239 240 /* bridge fdb flags */ 241 enum { 242 BR_FDB_LOCAL, 243 BR_FDB_STATIC, 244 BR_FDB_STICKY, 245 BR_FDB_ADDED_BY_USER, 246 BR_FDB_ADDED_BY_EXT_LEARN, 247 BR_FDB_OFFLOADED, 248 BR_FDB_NOTIFY, 249 BR_FDB_NOTIFY_INACTIVE 250 }; 251 252 struct net_bridge_fdb_key { 253 mac_addr addr; 254 u16 vlan_id; 255 }; 256 257 struct net_bridge_fdb_entry { 258 struct rhash_head rhnode; 259 struct net_bridge_port *dst; 260 261 struct net_bridge_fdb_key key; 262 struct hlist_node fdb_node; 263 unsigned long flags; 264 265 /* write-heavy members should not affect lookups */ 266 unsigned long updated ____cacheline_aligned_in_smp; 267 unsigned long used; 268 269 struct rcu_head rcu; 270 }; 271 272 #define MDB_PG_FLAGS_PERMANENT BIT(0) 273 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 274 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 275 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 276 #define MDB_PG_FLAGS_BLOCKED BIT(4) 277 278 #define PG_SRC_ENT_LIMIT 32 279 280 #define BR_SGRP_F_DELETE BIT(0) 281 #define BR_SGRP_F_SEND BIT(1) 282 #define BR_SGRP_F_INSTALLED BIT(2) 283 284 struct net_bridge_mcast_gc { 285 struct hlist_node gc_node; 286 void (*destroy)(struct net_bridge_mcast_gc *gc); 287 }; 288 289 struct net_bridge_group_src { 290 struct hlist_node node; 291 292 struct br_ip addr; 293 struct net_bridge_port_group *pg; 294 u8 flags; 295 u8 src_query_rexmit_cnt; 296 struct timer_list timer; 297 298 struct net_bridge *br; 299 struct net_bridge_mcast_gc mcast_gc; 300 struct rcu_head rcu; 301 }; 302 303 struct net_bridge_port_group_sg_key { 304 struct net_bridge_port *port; 305 struct br_ip addr; 306 }; 307 308 struct net_bridge_port_group { 309 struct net_bridge_port_group __rcu *next; 310 struct net_bridge_port_group_sg_key key; 311 unsigned char eth_addr[ETH_ALEN] __aligned(2); 312 unsigned char flags; 313 unsigned char filter_mode; 314 unsigned char grp_query_rexmit_cnt; 315 unsigned char rt_protocol; 316 317 struct hlist_head src_list; 318 unsigned int src_ents; 319 struct timer_list timer; 320 struct timer_list rexmit_timer; 321 struct hlist_node mglist; 322 struct rb_root eht_set_tree; 323 struct rb_root eht_host_tree; 324 325 struct rhash_head rhnode; 326 struct net_bridge_mcast_gc mcast_gc; 327 struct rcu_head rcu; 328 }; 329 330 struct net_bridge_mdb_entry { 331 struct rhash_head rhnode; 332 struct net_bridge *br; 333 struct net_bridge_port_group __rcu *ports; 334 struct br_ip addr; 335 bool host_joined; 336 337 struct timer_list timer; 338 struct hlist_node mdb_node; 339 340 struct net_bridge_mcast_gc mcast_gc; 341 struct rcu_head rcu; 342 }; 343 344 struct net_bridge_port { 345 struct net_bridge *br; 346 struct net_device *dev; 347 struct list_head list; 348 349 unsigned long flags; 350 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 351 struct net_bridge_vlan_group __rcu *vlgrp; 352 #endif 353 struct net_bridge_port __rcu *backup_port; 354 355 /* STP */ 356 u8 priority; 357 u8 state; 358 u16 port_no; 359 unsigned char topology_change_ack; 360 unsigned char config_pending; 361 port_id port_id; 362 port_id designated_port; 363 bridge_id designated_root; 364 bridge_id designated_bridge; 365 u32 path_cost; 366 u32 designated_cost; 367 unsigned long designated_age; 368 369 struct timer_list forward_delay_timer; 370 struct timer_list hold_timer; 371 struct timer_list message_age_timer; 372 struct kobject kobj; 373 struct rcu_head rcu; 374 375 struct net_bridge_mcast_port multicast_ctx; 376 377 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 378 struct bridge_mcast_stats __percpu *mcast_stats; 379 380 u32 multicast_eht_hosts_limit; 381 u32 multicast_eht_hosts_cnt; 382 struct hlist_head mglist; 383 #endif 384 385 #ifdef CONFIG_SYSFS 386 char sysfs_name[IFNAMSIZ]; 387 #endif 388 389 #ifdef CONFIG_NET_POLL_CONTROLLER 390 struct netpoll *np; 391 #endif 392 #ifdef CONFIG_NET_SWITCHDEV 393 /* Identifier used to group ports that share the same switchdev 394 * hardware domain. 395 */ 396 int hwdom; 397 int offload_count; 398 struct netdev_phys_item_id ppid; 399 #endif 400 u16 group_fwd_mask; 401 u16 backup_redirected_cnt; 402 403 struct bridge_stp_xstats stp_xstats; 404 }; 405 406 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 407 408 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 409 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 410 411 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 412 { 413 return rcu_dereference(dev->rx_handler_data); 414 } 415 416 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 417 { 418 return netif_is_bridge_port(dev) ? 419 rtnl_dereference(dev->rx_handler_data) : NULL; 420 } 421 422 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 423 { 424 return netif_is_bridge_port(dev) ? 425 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 426 } 427 428 enum net_bridge_opts { 429 BROPT_VLAN_ENABLED, 430 BROPT_VLAN_STATS_ENABLED, 431 BROPT_NF_CALL_IPTABLES, 432 BROPT_NF_CALL_IP6TABLES, 433 BROPT_NF_CALL_ARPTABLES, 434 BROPT_GROUP_ADDR_SET, 435 BROPT_MULTICAST_ENABLED, 436 BROPT_MULTICAST_QUERY_USE_IFADDR, 437 BROPT_MULTICAST_STATS_ENABLED, 438 BROPT_HAS_IPV6_ADDR, 439 BROPT_NEIGH_SUPPRESS_ENABLED, 440 BROPT_MTU_SET_BY_USER, 441 BROPT_VLAN_STATS_PER_PORT, 442 BROPT_NO_LL_LEARN, 443 BROPT_VLAN_BRIDGE_BINDING, 444 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 445 }; 446 447 struct net_bridge { 448 spinlock_t lock; 449 spinlock_t hash_lock; 450 struct hlist_head frame_type_list; 451 struct net_device *dev; 452 unsigned long options; 453 /* These fields are accessed on each packet */ 454 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 455 __be16 vlan_proto; 456 u16 default_pvid; 457 struct net_bridge_vlan_group __rcu *vlgrp; 458 #endif 459 460 struct rhashtable fdb_hash_tbl; 461 struct list_head port_list; 462 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 463 union { 464 struct rtable fake_rtable; 465 struct rt6_info fake_rt6_info; 466 }; 467 #endif 468 u16 group_fwd_mask; 469 u16 group_fwd_mask_required; 470 471 /* STP */ 472 bridge_id designated_root; 473 bridge_id bridge_id; 474 unsigned char topology_change; 475 unsigned char topology_change_detected; 476 u16 root_port; 477 unsigned long max_age; 478 unsigned long hello_time; 479 unsigned long forward_delay; 480 unsigned long ageing_time; 481 unsigned long bridge_max_age; 482 unsigned long bridge_hello_time; 483 unsigned long bridge_forward_delay; 484 unsigned long bridge_ageing_time; 485 u32 root_path_cost; 486 487 u8 group_addr[ETH_ALEN]; 488 489 enum { 490 BR_NO_STP, /* no spanning tree */ 491 BR_KERNEL_STP, /* old STP in kernel */ 492 BR_USER_STP, /* new RSTP in userspace */ 493 } stp_enabled; 494 495 struct net_bridge_mcast multicast_ctx; 496 497 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 498 struct bridge_mcast_stats __percpu *mcast_stats; 499 500 u32 hash_max; 501 502 spinlock_t multicast_lock; 503 504 struct rhashtable mdb_hash_tbl; 505 struct rhashtable sg_port_tbl; 506 507 struct hlist_head mcast_gc_list; 508 struct hlist_head mdb_list; 509 510 struct work_struct mcast_gc_work; 511 #endif 512 513 struct timer_list hello_timer; 514 struct timer_list tcn_timer; 515 struct timer_list topology_change_timer; 516 struct delayed_work gc_work; 517 struct kobject *ifobj; 518 u32 auto_cnt; 519 520 #ifdef CONFIG_NET_SWITCHDEV 521 /* Counter used to make sure that hardware domains get unique 522 * identifiers in case a bridge spans multiple switchdev instances. 523 */ 524 int last_hwdom; 525 /* Bit mask of hardware domain numbers in use */ 526 unsigned long busy_hwdoms; 527 #endif 528 struct hlist_head fdb_list; 529 530 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 531 struct hlist_head mrp_list; 532 #endif 533 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 534 struct hlist_head mep_list; 535 #endif 536 }; 537 538 struct br_input_skb_cb { 539 struct net_device *brdev; 540 541 u16 frag_max_size; 542 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 543 u8 igmp; 544 u8 mrouters_only:1; 545 #endif 546 u8 proxyarp_replied:1; 547 u8 src_port_isolated:1; 548 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 549 u8 vlan_filtered:1; 550 #endif 551 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 552 u8 br_netfilter_broute:1; 553 #endif 554 555 #ifdef CONFIG_NET_SWITCHDEV 556 /* Set if TX data plane offloading is used towards at least one 557 * hardware domain. 558 */ 559 u8 tx_fwd_offload:1; 560 /* The switchdev hardware domain from which this packet was received. 561 * If skb->offload_fwd_mark was set, then this packet was already 562 * forwarded by hardware to the other ports in the source hardware 563 * domain, otherwise it wasn't. 564 */ 565 int src_hwdom; 566 /* Bit mask of hardware domains towards this packet has already been 567 * transmitted using the TX data plane offload. 568 */ 569 unsigned long fwd_hwdoms; 570 #endif 571 }; 572 573 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 574 575 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 576 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 577 #else 578 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 579 #endif 580 581 #define br_printk(level, br, format, args...) \ 582 printk(level "%s: " format, (br)->dev->name, ##args) 583 584 #define br_err(__br, format, args...) \ 585 br_printk(KERN_ERR, __br, format, ##args) 586 #define br_warn(__br, format, args...) \ 587 br_printk(KERN_WARNING, __br, format, ##args) 588 #define br_notice(__br, format, args...) \ 589 br_printk(KERN_NOTICE, __br, format, ##args) 590 #define br_info(__br, format, args...) \ 591 br_printk(KERN_INFO, __br, format, ##args) 592 593 #define br_debug(br, format, args...) \ 594 pr_debug("%s: " format, (br)->dev->name, ##args) 595 596 /* called under bridge lock */ 597 static inline int br_is_root_bridge(const struct net_bridge *br) 598 { 599 return !memcmp(&br->bridge_id, &br->designated_root, 8); 600 } 601 602 /* check if a VLAN entry is global */ 603 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 604 { 605 return v->flags & BRIDGE_VLAN_INFO_MASTER; 606 } 607 608 /* check if a VLAN entry is used by the bridge */ 609 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 610 { 611 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 612 } 613 614 /* check if we should use the vlan entry, returns false if it's only context */ 615 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 616 { 617 if (br_vlan_is_master(v)) { 618 if (br_vlan_is_brentry(v)) 619 return true; 620 else 621 return false; 622 } 623 624 return true; 625 } 626 627 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 628 { 629 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 630 } 631 632 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 633 { 634 bool ret = vid > 0 && vid < VLAN_VID_MASK; 635 636 if (!ret) 637 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 638 639 return ret; 640 } 641 642 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 643 const struct bridge_vlan_info *last, 644 struct netlink_ext_ack *extack) 645 { 646 /* pvid flag is not allowed in ranges */ 647 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 648 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 649 return false; 650 } 651 652 /* when cur is the range end, check if: 653 * - it has range start flag 654 * - range ids are invalid (end is equal to or before start) 655 */ 656 if (last) { 657 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 658 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 659 return false; 660 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 661 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 662 return false; 663 } else if (cur->vid <= last->vid) { 664 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 665 return false; 666 } 667 } 668 669 /* check for required range flags */ 670 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 671 BRIDGE_VLAN_INFO_RANGE_END))) { 672 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 673 return false; 674 } 675 676 return true; 677 } 678 679 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 680 { 681 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 682 683 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 684 if (!br_vlan_is_master(v)) 685 mcast_router = v->port_mcast_ctx.multicast_router; 686 else 687 mcast_router = v->br_mcast_ctx.multicast_router; 688 #endif 689 690 return mcast_router; 691 } 692 693 static inline int br_afspec_cmd_to_rtm(int cmd) 694 { 695 switch (cmd) { 696 case RTM_SETLINK: 697 return RTM_NEWVLAN; 698 case RTM_DELLINK: 699 return RTM_DELVLAN; 700 } 701 702 return 0; 703 } 704 705 static inline int br_opt_get(const struct net_bridge *br, 706 enum net_bridge_opts opt) 707 { 708 return test_bit(opt, &br->options); 709 } 710 711 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 712 struct netlink_ext_ack *extack); 713 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 714 int br_boolopt_multi_toggle(struct net_bridge *br, 715 struct br_boolopt_multi *bm, 716 struct netlink_ext_ack *extack); 717 void br_boolopt_multi_get(const struct net_bridge *br, 718 struct br_boolopt_multi *bm); 719 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 720 721 /* br_device.c */ 722 void br_dev_setup(struct net_device *dev); 723 void br_dev_delete(struct net_device *dev, struct list_head *list); 724 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 725 #ifdef CONFIG_NET_POLL_CONTROLLER 726 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 727 struct sk_buff *skb) 728 { 729 netpoll_send_skb(p->np, skb); 730 } 731 732 int br_netpoll_enable(struct net_bridge_port *p); 733 void br_netpoll_disable(struct net_bridge_port *p); 734 #else 735 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 736 struct sk_buff *skb) 737 { 738 } 739 740 static inline int br_netpoll_enable(struct net_bridge_port *p) 741 { 742 return 0; 743 } 744 745 static inline void br_netpoll_disable(struct net_bridge_port *p) 746 { 747 } 748 #endif 749 750 /* br_fdb.c */ 751 int br_fdb_init(void); 752 void br_fdb_fini(void); 753 int br_fdb_hash_init(struct net_bridge *br); 754 void br_fdb_hash_fini(struct net_bridge *br); 755 void br_fdb_flush(struct net_bridge *br); 756 void br_fdb_find_delete_local(struct net_bridge *br, 757 const struct net_bridge_port *p, 758 const unsigned char *addr, u16 vid); 759 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 760 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 761 void br_fdb_cleanup(struct work_struct *work); 762 void br_fdb_delete_by_port(struct net_bridge *br, 763 const struct net_bridge_port *p, u16 vid, int do_all); 764 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 765 const unsigned char *addr, 766 __u16 vid); 767 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 768 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 769 unsigned long off); 770 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 771 const unsigned char *addr, u16 vid); 772 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 773 const unsigned char *addr, u16 vid, unsigned long flags); 774 775 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 776 struct net_device *dev, const unsigned char *addr, u16 vid); 777 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 778 const unsigned char *addr, u16 vid, u16 nlh_flags, 779 struct netlink_ext_ack *extack); 780 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 781 struct net_device *dev, struct net_device *fdev, int *idx); 782 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 783 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 784 struct netlink_ext_ack *extack); 785 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 786 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 787 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 788 const unsigned char *addr, u16 vid, 789 bool swdev_notify); 790 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 791 const unsigned char *addr, u16 vid, 792 bool swdev_notify); 793 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 794 const unsigned char *addr, u16 vid, bool offloaded); 795 796 /* br_forward.c */ 797 enum br_pkt_type { 798 BR_PKT_UNICAST, 799 BR_PKT_MULTICAST, 800 BR_PKT_BROADCAST 801 }; 802 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 803 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 804 bool local_rcv, bool local_orig); 805 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 806 void br_flood(struct net_bridge *br, struct sk_buff *skb, 807 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 808 809 /* return true if both source port and dest port are isolated */ 810 static inline bool br_skb_isolated(const struct net_bridge_port *to, 811 const struct sk_buff *skb) 812 { 813 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 814 (to->flags & BR_ISOLATED); 815 } 816 817 /* br_if.c */ 818 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 819 int br_add_bridge(struct net *net, const char *name); 820 int br_del_bridge(struct net *net, const char *name); 821 int br_add_if(struct net_bridge *br, struct net_device *dev, 822 struct netlink_ext_ack *extack); 823 int br_del_if(struct net_bridge *br, struct net_device *dev); 824 void br_mtu_auto_adjust(struct net_bridge *br); 825 netdev_features_t br_features_recompute(struct net_bridge *br, 826 netdev_features_t features); 827 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 828 void br_manage_promisc(struct net_bridge *br); 829 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 830 831 /* br_input.c */ 832 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 833 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 834 835 struct br_frame_type { 836 __be16 type; 837 int (*frame_handler)(struct net_bridge_port *port, 838 struct sk_buff *skb); 839 struct hlist_node list; 840 }; 841 842 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 843 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 844 845 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 846 { 847 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 848 } 849 850 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 851 { 852 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 853 } 854 855 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 856 { 857 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 858 } 859 860 static inline struct net_bridge_port * 861 br_port_get_check_rtnl(const struct net_device *dev) 862 { 863 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 864 } 865 866 /* br_ioctl.c */ 867 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 868 void __user *data, int cmd); 869 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 870 struct ifreq *ifr, void __user *uarg); 871 872 /* br_multicast.c */ 873 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 874 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 875 struct net_bridge_mcast_port **pmctx, 876 struct net_bridge_vlan *vlan, 877 struct sk_buff *skb, u16 vid); 878 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 879 struct sk_buff *skb, u16 vid); 880 int br_multicast_add_port(struct net_bridge_port *port); 881 void br_multicast_del_port(struct net_bridge_port *port); 882 void br_multicast_enable_port(struct net_bridge_port *port); 883 void br_multicast_disable_port(struct net_bridge_port *port); 884 void br_multicast_init(struct net_bridge *br); 885 void br_multicast_join_snoopers(struct net_bridge *br); 886 void br_multicast_leave_snoopers(struct net_bridge *br); 887 void br_multicast_open(struct net_bridge *br); 888 void br_multicast_stop(struct net_bridge *br); 889 void br_multicast_dev_del(struct net_bridge *br); 890 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 891 struct net_bridge_mcast *brmctx, 892 bool local_rcv, bool local_orig); 893 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 894 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 895 unsigned long val); 896 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 897 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 898 struct netlink_ext_ack *extack); 899 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 900 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 901 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 902 unsigned long val); 903 #if IS_ENABLED(CONFIG_IPV6) 904 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 905 unsigned long val); 906 #endif 907 struct net_bridge_mdb_entry * 908 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 909 struct net_bridge_mdb_entry * 910 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 911 struct net_bridge_port_group * 912 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 913 struct net_bridge_port_group __rcu *next, 914 unsigned char flags, const unsigned char *src, 915 u8 filter_mode, u8 rt_protocol); 916 int br_mdb_hash_init(struct net_bridge *br); 917 void br_mdb_hash_fini(struct net_bridge *br); 918 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 919 struct net_bridge_port_group *pg, int type); 920 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 921 int type); 922 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 923 struct net_bridge_port_group *pg, 924 struct net_bridge_port_group __rcu **pp); 925 void br_multicast_count(struct net_bridge *br, 926 const struct net_bridge_port *p, 927 const struct sk_buff *skb, u8 type, u8 dir); 928 int br_multicast_init_stats(struct net_bridge *br); 929 void br_multicast_uninit_stats(struct net_bridge *br); 930 void br_multicast_get_stats(const struct net_bridge *br, 931 const struct net_bridge_port *p, 932 struct br_mcast_stats *dest); 933 void br_mdb_init(void); 934 void br_mdb_uninit(void); 935 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 936 struct net_bridge_mdb_entry *mp, bool notify); 937 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 938 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 939 u8 filter_mode); 940 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 941 struct net_bridge_port_group *sg); 942 struct net_bridge_group_src * 943 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 944 void br_multicast_del_group_src(struct net_bridge_group_src *src, 945 bool fastleave); 946 void br_multicast_ctx_init(struct net_bridge *br, 947 struct net_bridge_vlan *vlan, 948 struct net_bridge_mcast *brmctx); 949 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 950 void br_multicast_port_ctx_init(struct net_bridge_port *port, 951 struct net_bridge_vlan *vlan, 952 struct net_bridge_mcast_port *pmctx); 953 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 954 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 955 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 956 struct netlink_ext_ack *extack); 957 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 958 959 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 960 const void *ctx, bool adding, struct notifier_block *nb, 961 struct netlink_ext_ack *extack); 962 int br_rports_fill_info(struct sk_buff *skb, 963 const struct net_bridge_mcast *brmctx); 964 int br_multicast_dump_querier_state(struct sk_buff *skb, 965 const struct net_bridge_mcast *brmctx, 966 int nest_attr); 967 size_t br_multicast_querier_state_size(void); 968 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 969 970 static inline bool br_group_is_l2(const struct br_ip *group) 971 { 972 return group->proto == 0; 973 } 974 975 #define mlock_dereference(X, br) \ 976 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 977 978 static inline struct hlist_node * 979 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 980 struct sk_buff *skb) 981 { 982 #if IS_ENABLED(CONFIG_IPV6) 983 if (skb->protocol == htons(ETH_P_IPV6)) 984 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 985 #endif 986 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 987 } 988 989 static inline struct net_bridge_port * 990 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 991 { 992 struct net_bridge_mcast_port *mctx; 993 994 #if IS_ENABLED(CONFIG_IPV6) 995 if (skb->protocol == htons(ETH_P_IPV6)) 996 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 997 ip6_rlist); 998 else 999 #endif 1000 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1001 ip4_rlist); 1002 1003 if (mctx) 1004 return mctx->port; 1005 else 1006 return NULL; 1007 } 1008 1009 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1010 { 1011 return timer_pending(&brmctx->ip4_mc_router_timer); 1012 } 1013 1014 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1015 { 1016 #if IS_ENABLED(CONFIG_IPV6) 1017 return timer_pending(&brmctx->ip6_mc_router_timer); 1018 #else 1019 return false; 1020 #endif 1021 } 1022 1023 static inline bool 1024 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1025 { 1026 switch (brmctx->multicast_router) { 1027 case MDB_RTR_TYPE_PERM: 1028 return true; 1029 case MDB_RTR_TYPE_TEMP_QUERY: 1030 if (skb) { 1031 if (skb->protocol == htons(ETH_P_IP)) 1032 return br_ip4_multicast_is_router(brmctx); 1033 else if (skb->protocol == htons(ETH_P_IPV6)) 1034 return br_ip6_multicast_is_router(brmctx); 1035 } else { 1036 return br_ip4_multicast_is_router(brmctx) || 1037 br_ip6_multicast_is_router(brmctx); 1038 } 1039 fallthrough; 1040 default: 1041 return false; 1042 } 1043 } 1044 1045 static inline bool 1046 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1047 struct bridge_mcast_other_query *querier, 1048 const bool is_ipv6) 1049 { 1050 bool own_querier_enabled; 1051 1052 if (brmctx->multicast_querier) { 1053 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1054 own_querier_enabled = false; 1055 else 1056 own_querier_enabled = true; 1057 } else { 1058 own_querier_enabled = false; 1059 } 1060 1061 return time_is_before_jiffies(querier->delay_time) && 1062 (own_querier_enabled || timer_pending(&querier->timer)); 1063 } 1064 1065 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1066 struct ethhdr *eth, 1067 const struct net_bridge_mdb_entry *mdb) 1068 { 1069 switch (eth->h_proto) { 1070 case (htons(ETH_P_IP)): 1071 return __br_multicast_querier_exists(brmctx, 1072 &brmctx->ip4_other_query, false); 1073 #if IS_ENABLED(CONFIG_IPV6) 1074 case (htons(ETH_P_IPV6)): 1075 return __br_multicast_querier_exists(brmctx, 1076 &brmctx->ip6_other_query, true); 1077 #endif 1078 default: 1079 return !!mdb && br_group_is_l2(&mdb->addr); 1080 } 1081 } 1082 1083 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1084 { 1085 switch (ip->proto) { 1086 case htons(ETH_P_IP): 1087 return ipv4_is_zeronet(ip->src.ip4); 1088 #if IS_ENABLED(CONFIG_IPV6) 1089 case htons(ETH_P_IPV6): 1090 return ipv6_addr_any(&ip->src.ip6); 1091 #endif 1092 default: 1093 return false; 1094 } 1095 } 1096 1097 static inline bool 1098 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1099 __be16 proto) 1100 { 1101 switch (proto) { 1102 case htons(ETH_P_IP): 1103 return !!(brmctx->multicast_igmp_version == 3); 1104 #if IS_ENABLED(CONFIG_IPV6) 1105 case htons(ETH_P_IPV6): 1106 return !!(brmctx->multicast_mld_version == 2); 1107 #endif 1108 default: 1109 return false; 1110 } 1111 } 1112 1113 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1114 { 1115 return BR_INPUT_SKB_CB(skb)->igmp; 1116 } 1117 1118 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1119 { 1120 return brmctx->multicast_last_member_interval * 1121 brmctx->multicast_last_member_count; 1122 } 1123 1124 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1125 { 1126 return brmctx->multicast_membership_interval; 1127 } 1128 1129 static inline bool 1130 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1131 { 1132 return !!brmctx->vlan; 1133 } 1134 1135 static inline bool 1136 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1137 { 1138 return !!pmctx->vlan; 1139 } 1140 1141 static inline struct net_bridge_mcast * 1142 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1143 { 1144 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1145 return &pmctx->port->br->multicast_ctx; 1146 else 1147 return &pmctx->vlan->brvlan->br_mcast_ctx; 1148 } 1149 1150 static inline bool 1151 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1152 { 1153 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1154 br_multicast_ctx_is_vlan(brmctx) && 1155 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1156 } 1157 1158 static inline bool 1159 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1160 { 1161 return br_multicast_ctx_is_vlan(brmctx) && 1162 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1163 } 1164 1165 static inline bool 1166 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1167 { 1168 return br_multicast_port_ctx_is_vlan(pmctx) && 1169 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1170 } 1171 1172 static inline bool 1173 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1174 { 1175 return pmctx->port->state == BR_STATE_DISABLED || 1176 (br_multicast_port_ctx_is_vlan(pmctx) && 1177 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1178 pmctx->vlan->state == BR_STATE_DISABLED)); 1179 } 1180 1181 static inline bool 1182 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1183 { 1184 return br_multicast_port_ctx_state_disabled(pmctx) || 1185 pmctx->port->state == BR_STATE_BLOCKING || 1186 (br_multicast_port_ctx_is_vlan(pmctx) && 1187 pmctx->vlan->state == BR_STATE_BLOCKING); 1188 } 1189 1190 static inline bool 1191 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1192 { 1193 #if IS_ENABLED(CONFIG_IPV6) 1194 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1195 !hlist_empty(&brmctx->ip6_mc_router_list); 1196 #else 1197 return !hlist_empty(&brmctx->ip4_mc_router_list); 1198 #endif 1199 } 1200 1201 static inline bool 1202 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1203 const struct net_bridge_mcast *brmctx2) 1204 { 1205 return brmctx1->multicast_igmp_version == 1206 brmctx2->multicast_igmp_version && 1207 brmctx1->multicast_last_member_count == 1208 brmctx2->multicast_last_member_count && 1209 brmctx1->multicast_startup_query_count == 1210 brmctx2->multicast_startup_query_count && 1211 brmctx1->multicast_last_member_interval == 1212 brmctx2->multicast_last_member_interval && 1213 brmctx1->multicast_membership_interval == 1214 brmctx2->multicast_membership_interval && 1215 brmctx1->multicast_querier_interval == 1216 brmctx2->multicast_querier_interval && 1217 brmctx1->multicast_query_interval == 1218 brmctx2->multicast_query_interval && 1219 brmctx1->multicast_query_response_interval == 1220 brmctx2->multicast_query_response_interval && 1221 brmctx1->multicast_startup_query_interval == 1222 brmctx2->multicast_startup_query_interval && 1223 brmctx1->multicast_querier == brmctx2->multicast_querier && 1224 brmctx1->multicast_router == brmctx2->multicast_router && 1225 !br_rports_have_mc_router(brmctx1) && 1226 !br_rports_have_mc_router(brmctx2) && 1227 #if IS_ENABLED(CONFIG_IPV6) 1228 brmctx1->multicast_mld_version == 1229 brmctx2->multicast_mld_version && 1230 #endif 1231 true; 1232 } 1233 1234 static inline bool 1235 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1236 { 1237 bool vlan_snooping_enabled; 1238 1239 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1240 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1241 1242 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1243 } 1244 #else 1245 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1246 struct net_bridge_mcast_port **pmctx, 1247 struct net_bridge_vlan *vlan, 1248 struct sk_buff *skb, 1249 u16 vid) 1250 { 1251 return 0; 1252 } 1253 1254 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1255 struct sk_buff *skb, u16 vid) 1256 { 1257 return NULL; 1258 } 1259 1260 static inline int br_multicast_add_port(struct net_bridge_port *port) 1261 { 1262 return 0; 1263 } 1264 1265 static inline void br_multicast_del_port(struct net_bridge_port *port) 1266 { 1267 } 1268 1269 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1270 { 1271 } 1272 1273 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1274 { 1275 } 1276 1277 static inline void br_multicast_init(struct net_bridge *br) 1278 { 1279 } 1280 1281 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1282 { 1283 } 1284 1285 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1286 { 1287 } 1288 1289 static inline void br_multicast_open(struct net_bridge *br) 1290 { 1291 } 1292 1293 static inline void br_multicast_stop(struct net_bridge *br) 1294 { 1295 } 1296 1297 static inline void br_multicast_dev_del(struct net_bridge *br) 1298 { 1299 } 1300 1301 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1302 struct sk_buff *skb, 1303 struct net_bridge_mcast *brmctx, 1304 bool local_rcv, bool local_orig) 1305 { 1306 } 1307 1308 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1309 struct sk_buff *skb) 1310 { 1311 return false; 1312 } 1313 1314 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1315 struct ethhdr *eth, 1316 const struct net_bridge_mdb_entry *mdb) 1317 { 1318 return false; 1319 } 1320 1321 static inline void br_mdb_init(void) 1322 { 1323 } 1324 1325 static inline void br_mdb_uninit(void) 1326 { 1327 } 1328 1329 static inline int br_mdb_hash_init(struct net_bridge *br) 1330 { 1331 return 0; 1332 } 1333 1334 static inline void br_mdb_hash_fini(struct net_bridge *br) 1335 { 1336 } 1337 1338 static inline void br_multicast_count(struct net_bridge *br, 1339 const struct net_bridge_port *p, 1340 const struct sk_buff *skb, 1341 u8 type, u8 dir) 1342 { 1343 } 1344 1345 static inline int br_multicast_init_stats(struct net_bridge *br) 1346 { 1347 return 0; 1348 } 1349 1350 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1351 { 1352 } 1353 1354 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1355 { 1356 return 0; 1357 } 1358 1359 static inline void br_multicast_ctx_init(struct net_bridge *br, 1360 struct net_bridge_vlan *vlan, 1361 struct net_bridge_mcast *brmctx) 1362 { 1363 } 1364 1365 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1366 { 1367 } 1368 1369 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1370 struct net_bridge_vlan *vlan, 1371 struct net_bridge_mcast_port *pmctx) 1372 { 1373 } 1374 1375 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1376 { 1377 } 1378 1379 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1380 bool on) 1381 { 1382 } 1383 1384 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1385 bool on, 1386 struct netlink_ext_ack *extack) 1387 { 1388 return -EOPNOTSUPP; 1389 } 1390 1391 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1392 bool on) 1393 { 1394 return false; 1395 } 1396 1397 static inline int br_mdb_replay(struct net_device *br_dev, 1398 struct net_device *dev, const void *ctx, 1399 bool adding, struct notifier_block *nb, 1400 struct netlink_ext_ack *extack) 1401 { 1402 return -EOPNOTSUPP; 1403 } 1404 1405 static inline bool 1406 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1407 const struct net_bridge_mcast *brmctx2) 1408 { 1409 return true; 1410 } 1411 #endif 1412 1413 /* br_vlan.c */ 1414 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1415 bool br_allowed_ingress(const struct net_bridge *br, 1416 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1417 u16 *vid, u8 *state, 1418 struct net_bridge_vlan **vlan); 1419 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1420 const struct sk_buff *skb); 1421 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1422 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1423 const struct net_bridge_port *port, 1424 struct net_bridge_vlan_group *vg, 1425 struct sk_buff *skb); 1426 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1427 bool *changed, struct netlink_ext_ack *extack); 1428 int br_vlan_delete(struct net_bridge *br, u16 vid); 1429 void br_vlan_flush(struct net_bridge *br); 1430 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1431 void br_recalculate_fwd_mask(struct net_bridge *br); 1432 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1433 struct netlink_ext_ack *extack); 1434 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1435 struct netlink_ext_ack *extack); 1436 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1437 struct netlink_ext_ack *extack); 1438 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1439 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1440 int br_vlan_init(struct net_bridge *br); 1441 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1442 struct netlink_ext_ack *extack); 1443 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1444 struct netlink_ext_ack *extack); 1445 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1446 bool *changed, struct netlink_ext_ack *extack); 1447 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1448 void nbp_vlan_flush(struct net_bridge_port *port); 1449 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1450 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1451 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1452 struct pcpu_sw_netstats *stats); 1453 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1454 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1455 void *ptr); 1456 void br_vlan_rtnl_init(void); 1457 void br_vlan_rtnl_uninit(void); 1458 void br_vlan_notify(const struct net_bridge *br, 1459 const struct net_bridge_port *p, 1460 u16 vid, u16 vid_range, 1461 int cmd); 1462 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1463 const struct net_bridge_vlan *range_end); 1464 1465 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1466 struct net_device_path_ctx *ctx, 1467 struct net_device_path *path); 1468 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1469 struct net_bridge_port *dst, 1470 struct net_device_path *path); 1471 1472 static inline struct net_bridge_vlan_group *br_vlan_group( 1473 const struct net_bridge *br) 1474 { 1475 return rtnl_dereference(br->vlgrp); 1476 } 1477 1478 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1479 const struct net_bridge_port *p) 1480 { 1481 return rtnl_dereference(p->vlgrp); 1482 } 1483 1484 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1485 const struct net_bridge *br) 1486 { 1487 return rcu_dereference(br->vlgrp); 1488 } 1489 1490 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1491 const struct net_bridge_port *p) 1492 { 1493 return rcu_dereference(p->vlgrp); 1494 } 1495 1496 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1497 * skb, the vlan tag will always be present if the frame was tagged. 1498 */ 1499 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1500 { 1501 int err = 0; 1502 1503 if (skb_vlan_tag_present(skb)) { 1504 *vid = skb_vlan_tag_get_id(skb); 1505 } else { 1506 *vid = 0; 1507 err = -EINVAL; 1508 } 1509 1510 return err; 1511 } 1512 1513 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1514 { 1515 if (!vg) 1516 return 0; 1517 1518 smp_rmb(); 1519 return vg->pvid; 1520 } 1521 1522 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1523 { 1524 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1525 } 1526 #else 1527 static inline bool br_allowed_ingress(const struct net_bridge *br, 1528 struct net_bridge_vlan_group *vg, 1529 struct sk_buff *skb, 1530 u16 *vid, u8 *state, 1531 struct net_bridge_vlan **vlan) 1532 1533 { 1534 *vlan = NULL; 1535 return true; 1536 } 1537 1538 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1539 const struct sk_buff *skb) 1540 { 1541 return true; 1542 } 1543 1544 static inline bool br_should_learn(struct net_bridge_port *p, 1545 struct sk_buff *skb, u16 *vid) 1546 { 1547 return true; 1548 } 1549 1550 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1551 const struct net_bridge_port *port, 1552 struct net_bridge_vlan_group *vg, 1553 struct sk_buff *skb) 1554 { 1555 return skb; 1556 } 1557 1558 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1559 bool *changed, struct netlink_ext_ack *extack) 1560 { 1561 *changed = false; 1562 return -EOPNOTSUPP; 1563 } 1564 1565 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1566 { 1567 return -EOPNOTSUPP; 1568 } 1569 1570 static inline void br_vlan_flush(struct net_bridge *br) 1571 { 1572 } 1573 1574 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1575 { 1576 } 1577 1578 static inline int br_vlan_init(struct net_bridge *br) 1579 { 1580 return 0; 1581 } 1582 1583 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1584 bool *changed, struct netlink_ext_ack *extack) 1585 { 1586 *changed = false; 1587 return -EOPNOTSUPP; 1588 } 1589 1590 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1591 { 1592 return -EOPNOTSUPP; 1593 } 1594 1595 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1596 { 1597 } 1598 1599 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1600 u16 vid) 1601 { 1602 return NULL; 1603 } 1604 1605 static inline int nbp_vlan_init(struct net_bridge_port *port, 1606 struct netlink_ext_ack *extack) 1607 { 1608 return 0; 1609 } 1610 1611 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1612 { 1613 return 0; 1614 } 1615 1616 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1617 { 1618 return 0; 1619 } 1620 1621 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1622 unsigned long val, 1623 struct netlink_ext_ack *extack) 1624 { 1625 return -EOPNOTSUPP; 1626 } 1627 1628 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1629 u32 filter_mask) 1630 { 1631 return 0; 1632 } 1633 1634 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1635 struct net_device_path_ctx *ctx, 1636 struct net_device_path *path) 1637 { 1638 } 1639 1640 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1641 struct net_bridge_port *dst, 1642 struct net_device_path *path) 1643 { 1644 return 0; 1645 } 1646 1647 static inline struct net_bridge_vlan_group *br_vlan_group( 1648 const struct net_bridge *br) 1649 { 1650 return NULL; 1651 } 1652 1653 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1654 const struct net_bridge_port *p) 1655 { 1656 return NULL; 1657 } 1658 1659 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1660 const struct net_bridge *br) 1661 { 1662 return NULL; 1663 } 1664 1665 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1666 const struct net_bridge_port *p) 1667 { 1668 return NULL; 1669 } 1670 1671 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1672 struct pcpu_sw_netstats *stats) 1673 { 1674 } 1675 1676 static inline void br_vlan_port_event(struct net_bridge_port *p, 1677 unsigned long event) 1678 { 1679 } 1680 1681 static inline int br_vlan_bridge_event(struct net_device *dev, 1682 unsigned long event, void *ptr) 1683 { 1684 return 0; 1685 } 1686 1687 static inline void br_vlan_rtnl_init(void) 1688 { 1689 } 1690 1691 static inline void br_vlan_rtnl_uninit(void) 1692 { 1693 } 1694 1695 static inline void br_vlan_notify(const struct net_bridge *br, 1696 const struct net_bridge_port *p, 1697 u16 vid, u16 vid_range, 1698 int cmd) 1699 { 1700 } 1701 1702 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1703 const struct net_bridge_vlan *range_end) 1704 { 1705 return true; 1706 } 1707 1708 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1709 { 1710 return 0; 1711 } 1712 1713 #endif 1714 1715 /* br_vlan_options.c */ 1716 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1717 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1718 const struct net_bridge_vlan *range_end); 1719 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1720 size_t br_vlan_opts_nl_size(void); 1721 int br_vlan_process_options(const struct net_bridge *br, 1722 const struct net_bridge_port *p, 1723 struct net_bridge_vlan *range_start, 1724 struct net_bridge_vlan *range_end, 1725 struct nlattr **tb, 1726 struct netlink_ext_ack *extack); 1727 int br_vlan_rtm_process_global_options(struct net_device *dev, 1728 const struct nlattr *attr, 1729 int cmd, 1730 struct netlink_ext_ack *extack); 1731 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1732 const struct net_bridge_vlan *r_end); 1733 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1734 const struct net_bridge_vlan *v_opts); 1735 1736 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1737 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1738 { 1739 return READ_ONCE(v->state); 1740 } 1741 1742 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1743 { 1744 WRITE_ONCE(v->state, state); 1745 } 1746 1747 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1748 { 1749 return READ_ONCE(vg->pvid_state); 1750 } 1751 1752 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1753 u8 state) 1754 { 1755 WRITE_ONCE(vg->pvid_state, state); 1756 } 1757 1758 /* learn_allow is true at ingress and false at egress */ 1759 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1760 { 1761 switch (state) { 1762 case BR_STATE_LEARNING: 1763 return learn_allow; 1764 case BR_STATE_FORWARDING: 1765 return true; 1766 default: 1767 return false; 1768 } 1769 } 1770 #endif 1771 1772 struct nf_br_ops { 1773 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1774 }; 1775 extern const struct nf_br_ops __rcu *nf_br_ops; 1776 1777 /* br_netfilter.c */ 1778 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1779 int br_nf_core_init(void); 1780 void br_nf_core_fini(void); 1781 void br_netfilter_rtable_init(struct net_bridge *); 1782 #else 1783 static inline int br_nf_core_init(void) { return 0; } 1784 static inline void br_nf_core_fini(void) {} 1785 #define br_netfilter_rtable_init(x) 1786 #endif 1787 1788 /* br_stp.c */ 1789 void br_set_state(struct net_bridge_port *p, unsigned int state); 1790 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1791 void br_init_port(struct net_bridge_port *p); 1792 void br_become_designated_port(struct net_bridge_port *p); 1793 1794 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1795 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1796 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1797 int br_set_max_age(struct net_bridge *br, unsigned long x); 1798 int __set_ageing_time(struct net_device *dev, unsigned long t); 1799 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1800 1801 1802 /* br_stp_if.c */ 1803 void br_stp_enable_bridge(struct net_bridge *br); 1804 void br_stp_disable_bridge(struct net_bridge *br); 1805 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1806 struct netlink_ext_ack *extack); 1807 void br_stp_enable_port(struct net_bridge_port *p); 1808 void br_stp_disable_port(struct net_bridge_port *p); 1809 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1810 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1811 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1812 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1813 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1814 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1815 1816 /* br_stp_bpdu.c */ 1817 struct stp_proto; 1818 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1819 struct net_device *dev); 1820 1821 /* br_stp_timer.c */ 1822 void br_stp_timer_init(struct net_bridge *br); 1823 void br_stp_port_timer_init(struct net_bridge_port *p); 1824 unsigned long br_timer_value(const struct timer_list *timer); 1825 1826 /* br.c */ 1827 #if IS_ENABLED(CONFIG_ATM_LANE) 1828 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1829 #endif 1830 1831 /* br_mrp.c */ 1832 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1833 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1834 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1835 bool br_mrp_enabled(struct net_bridge *br); 1836 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1837 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1838 #else 1839 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1840 struct nlattr *attr, int cmd, 1841 struct netlink_ext_ack *extack) 1842 { 1843 return -EOPNOTSUPP; 1844 } 1845 1846 static inline bool br_mrp_enabled(struct net_bridge *br) 1847 { 1848 return false; 1849 } 1850 1851 static inline void br_mrp_port_del(struct net_bridge *br, 1852 struct net_bridge_port *p) 1853 { 1854 } 1855 1856 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1857 { 1858 return 0; 1859 } 1860 1861 #endif 1862 1863 /* br_cfm.c */ 1864 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1865 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1866 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1867 bool br_cfm_created(struct net_bridge *br); 1868 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1869 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1870 int br_cfm_status_fill_info(struct sk_buff *skb, 1871 struct net_bridge *br, 1872 bool getlink); 1873 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1874 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1875 #else 1876 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1877 struct nlattr *attr, int cmd, 1878 struct netlink_ext_ack *extack) 1879 { 1880 return -EOPNOTSUPP; 1881 } 1882 1883 static inline bool br_cfm_created(struct net_bridge *br) 1884 { 1885 return false; 1886 } 1887 1888 static inline void br_cfm_port_del(struct net_bridge *br, 1889 struct net_bridge_port *p) 1890 { 1891 } 1892 1893 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1894 { 1895 return -EOPNOTSUPP; 1896 } 1897 1898 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1899 struct net_bridge *br, 1900 bool getlink) 1901 { 1902 return -EOPNOTSUPP; 1903 } 1904 1905 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1906 { 1907 return -EOPNOTSUPP; 1908 } 1909 1910 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1911 { 1912 return -EOPNOTSUPP; 1913 } 1914 #endif 1915 1916 /* br_netlink.c */ 1917 extern struct rtnl_link_ops br_link_ops; 1918 int br_netlink_init(void); 1919 void br_netlink_fini(void); 1920 void br_ifinfo_notify(int event, const struct net_bridge *br, 1921 const struct net_bridge_port *port); 1922 void br_info_notify(int event, const struct net_bridge *br, 1923 const struct net_bridge_port *port, u32 filter); 1924 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1925 struct netlink_ext_ack *extack); 1926 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1927 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1928 u32 filter_mask, int nlflags); 1929 int br_process_vlan_info(struct net_bridge *br, 1930 struct net_bridge_port *p, int cmd, 1931 struct bridge_vlan_info *vinfo_curr, 1932 struct bridge_vlan_info **vinfo_last, 1933 bool *changed, 1934 struct netlink_ext_ack *extack); 1935 1936 #ifdef CONFIG_SYSFS 1937 /* br_sysfs_if.c */ 1938 extern const struct sysfs_ops brport_sysfs_ops; 1939 int br_sysfs_addif(struct net_bridge_port *p); 1940 int br_sysfs_renameif(struct net_bridge_port *p); 1941 1942 /* br_sysfs_br.c */ 1943 int br_sysfs_addbr(struct net_device *dev); 1944 void br_sysfs_delbr(struct net_device *dev); 1945 1946 #else 1947 1948 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1949 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1950 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1951 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1952 #endif /* CONFIG_SYSFS */ 1953 1954 /* br_switchdev.c */ 1955 #ifdef CONFIG_NET_SWITCHDEV 1956 int br_switchdev_port_offload(struct net_bridge_port *p, 1957 struct net_device *dev, const void *ctx, 1958 struct notifier_block *atomic_nb, 1959 struct notifier_block *blocking_nb, 1960 bool tx_fwd_offload, 1961 struct netlink_ext_ack *extack); 1962 1963 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1964 struct notifier_block *atomic_nb, 1965 struct notifier_block *blocking_nb); 1966 1967 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1968 1969 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1970 1971 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1972 struct sk_buff *skb); 1973 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1974 struct sk_buff *skb); 1975 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1976 struct sk_buff *skb); 1977 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1978 const struct sk_buff *skb); 1979 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1980 unsigned long flags, 1981 unsigned long mask, 1982 struct netlink_ext_ack *extack); 1983 void br_switchdev_fdb_notify(struct net_bridge *br, 1984 const struct net_bridge_fdb_entry *fdb, int type); 1985 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1986 struct netlink_ext_ack *extack); 1987 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1988 void br_switchdev_init(struct net_bridge *br); 1989 1990 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1991 { 1992 skb->offload_fwd_mark = 0; 1993 } 1994 #else 1995 static inline int 1996 br_switchdev_port_offload(struct net_bridge_port *p, 1997 struct net_device *dev, const void *ctx, 1998 struct notifier_block *atomic_nb, 1999 struct notifier_block *blocking_nb, 2000 bool tx_fwd_offload, 2001 struct netlink_ext_ack *extack) 2002 { 2003 return -EOPNOTSUPP; 2004 } 2005 2006 static inline void 2007 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2008 struct notifier_block *atomic_nb, 2009 struct notifier_block *blocking_nb) 2010 { 2011 } 2012 2013 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2014 { 2015 return false; 2016 } 2017 2018 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2019 { 2020 } 2021 2022 static inline void 2023 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2024 struct sk_buff *skb) 2025 { 2026 } 2027 2028 static inline void 2029 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2030 struct sk_buff *skb) 2031 { 2032 } 2033 2034 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2035 struct sk_buff *skb) 2036 { 2037 } 2038 2039 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2040 const struct sk_buff *skb) 2041 { 2042 return true; 2043 } 2044 2045 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2046 unsigned long flags, 2047 unsigned long mask, 2048 struct netlink_ext_ack *extack) 2049 { 2050 return 0; 2051 } 2052 2053 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2054 u16 vid, u16 flags, 2055 struct netlink_ext_ack *extack) 2056 { 2057 return -EOPNOTSUPP; 2058 } 2059 2060 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2061 { 2062 return -EOPNOTSUPP; 2063 } 2064 2065 static inline void 2066 br_switchdev_fdb_notify(struct net_bridge *br, 2067 const struct net_bridge_fdb_entry *fdb, int type) 2068 { 2069 } 2070 2071 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2072 { 2073 } 2074 2075 static inline void br_switchdev_init(struct net_bridge *br) 2076 { 2077 } 2078 2079 #endif /* CONFIG_NET_SWITCHDEV */ 2080 2081 /* br_arp_nd_proxy.c */ 2082 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2083 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2084 u16 vid, struct net_bridge_port *p); 2085 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2086 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2087 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2088 #endif 2089