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 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 32 33 #define BR_HWDOM_MAX BITS_PER_LONG 34 35 #define BR_VERSION "2.3" 36 37 /* Control of forwarding link local multicast */ 38 #define BR_GROUPFWD_DEFAULT 0 39 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 40 enum { 41 BR_GROUPFWD_STP = BIT(0), 42 BR_GROUPFWD_MACPAUSE = BIT(1), 43 BR_GROUPFWD_LACP = BIT(2), 44 }; 45 46 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 47 BR_GROUPFWD_LACP) 48 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 49 #define BR_GROUPFWD_8021AD 0xB801u 50 51 /* Path to usermode spanning tree program */ 52 #define BR_STP_PROG "/sbin/bridge-stp" 53 54 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 55 56 typedef struct bridge_id bridge_id; 57 typedef struct mac_addr mac_addr; 58 typedef __u16 port_id; 59 60 struct bridge_id { 61 unsigned char prio[2]; 62 unsigned char addr[ETH_ALEN]; 63 }; 64 65 struct mac_addr { 66 unsigned char addr[ETH_ALEN]; 67 }; 68 69 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 70 /* our own querier */ 71 struct bridge_mcast_own_query { 72 struct timer_list timer; 73 u32 startup_sent; 74 }; 75 76 /* other querier */ 77 struct bridge_mcast_other_query { 78 struct timer_list timer; 79 unsigned long delay_time; 80 }; 81 82 /* selected querier */ 83 struct bridge_mcast_querier { 84 struct br_ip addr; 85 int port_ifidx; 86 seqcount_spinlock_t seq; 87 }; 88 89 /* IGMP/MLD statistics */ 90 struct bridge_mcast_stats { 91 struct br_mcast_stats mstats; 92 struct u64_stats_sync syncp; 93 }; 94 #endif 95 96 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 97 struct net_bridge_mcast_port { 98 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 99 struct net_bridge_port *port; 100 struct net_bridge_vlan *vlan; 101 102 struct bridge_mcast_own_query ip4_own_query; 103 struct timer_list ip4_mc_router_timer; 104 struct hlist_node ip4_rlist; 105 #if IS_ENABLED(CONFIG_IPV6) 106 struct bridge_mcast_own_query ip6_own_query; 107 struct timer_list ip6_mc_router_timer; 108 struct hlist_node ip6_rlist; 109 #endif /* IS_ENABLED(CONFIG_IPV6) */ 110 unsigned char multicast_router; 111 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 112 }; 113 114 /* net_bridge_mcast must be always defined due to forwarding stubs */ 115 struct net_bridge_mcast { 116 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 117 struct net_bridge *br; 118 struct net_bridge_vlan *vlan; 119 120 u32 multicast_last_member_count; 121 u32 multicast_startup_query_count; 122 123 u8 multicast_querier; 124 u8 multicast_igmp_version; 125 u8 multicast_router; 126 #if IS_ENABLED(CONFIG_IPV6) 127 u8 multicast_mld_version; 128 #endif 129 unsigned long multicast_last_member_interval; 130 unsigned long multicast_membership_interval; 131 unsigned long multicast_querier_interval; 132 unsigned long multicast_query_interval; 133 unsigned long multicast_query_response_interval; 134 unsigned long multicast_startup_query_interval; 135 struct hlist_head ip4_mc_router_list; 136 struct timer_list ip4_mc_router_timer; 137 struct bridge_mcast_other_query ip4_other_query; 138 struct bridge_mcast_own_query ip4_own_query; 139 struct bridge_mcast_querier ip4_querier; 140 #if IS_ENABLED(CONFIG_IPV6) 141 struct hlist_head ip6_mc_router_list; 142 struct timer_list ip6_mc_router_timer; 143 struct bridge_mcast_other_query ip6_other_query; 144 struct bridge_mcast_own_query ip6_own_query; 145 struct bridge_mcast_querier ip6_querier; 146 #endif /* IS_ENABLED(CONFIG_IPV6) */ 147 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 148 }; 149 150 struct br_tunnel_info { 151 __be64 tunnel_id; 152 struct metadata_dst __rcu *tunnel_dst; 153 }; 154 155 /* private vlan flags */ 156 enum { 157 BR_VLFLAG_PER_PORT_STATS = BIT(0), 158 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 159 BR_VLFLAG_MCAST_ENABLED = BIT(2), 160 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 161 }; 162 163 /** 164 * struct net_bridge_vlan - per-vlan entry 165 * 166 * @vnode: rhashtable member 167 * @vid: VLAN id 168 * @flags: bridge vlan flags 169 * @priv_flags: private (in-kernel) bridge vlan flags 170 * @state: STP state (e.g. blocking, learning, forwarding) 171 * @stats: per-cpu VLAN statistics 172 * @br: if MASTER flag set, this points to a bridge struct 173 * @port: if MASTER flag unset, this points to a port struct 174 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 175 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 176 * for this VLAN entry 177 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 178 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 179 * context 180 * @vlist: sorted list of VLAN entries 181 * @rcu: used for entry destruction 182 * 183 * This structure is shared between the global per-VLAN entries contained in 184 * the bridge rhashtable and the local per-port per-VLAN entries contained in 185 * the port's rhashtable. The union entries should be interpreted depending on 186 * the entry flags that are set. 187 */ 188 struct net_bridge_vlan { 189 struct rhash_head vnode; 190 struct rhash_head tnode; 191 u16 vid; 192 u16 flags; 193 u16 priv_flags; 194 u8 state; 195 struct pcpu_sw_netstats __percpu *stats; 196 union { 197 struct net_bridge *br; 198 struct net_bridge_port *port; 199 }; 200 union { 201 refcount_t refcnt; 202 struct net_bridge_vlan *brvlan; 203 }; 204 205 struct br_tunnel_info tinfo; 206 207 union { 208 struct net_bridge_mcast br_mcast_ctx; 209 struct net_bridge_mcast_port port_mcast_ctx; 210 }; 211 212 struct list_head vlist; 213 214 struct rcu_head rcu; 215 }; 216 217 /** 218 * struct net_bridge_vlan_group 219 * 220 * @vlan_hash: VLAN entry rhashtable 221 * @vlan_list: sorted VLAN entry list 222 * @num_vlans: number of total VLAN entries 223 * @pvid: PVID VLAN id 224 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 225 * 226 * IMPORTANT: Be careful when checking if there're VLAN entries using list 227 * primitives because the bridge can have entries in its list which 228 * are just for global context but not for filtering, i.e. they have 229 * the master flag set but not the brentry flag. If you have to check 230 * if there're "real" entries in the bridge please test @num_vlans 231 */ 232 struct net_bridge_vlan_group { 233 struct rhashtable vlan_hash; 234 struct rhashtable tunnel_hash; 235 struct list_head vlan_list; 236 u16 num_vlans; 237 u16 pvid; 238 u8 pvid_state; 239 }; 240 241 /* bridge fdb flags */ 242 enum { 243 BR_FDB_LOCAL, 244 BR_FDB_STATIC, 245 BR_FDB_STICKY, 246 BR_FDB_ADDED_BY_USER, 247 BR_FDB_ADDED_BY_EXT_LEARN, 248 BR_FDB_OFFLOADED, 249 BR_FDB_NOTIFY, 250 BR_FDB_NOTIFY_INACTIVE 251 }; 252 253 struct net_bridge_fdb_key { 254 mac_addr addr; 255 u16 vlan_id; 256 }; 257 258 struct net_bridge_fdb_entry { 259 struct rhash_head rhnode; 260 struct net_bridge_port *dst; 261 262 struct net_bridge_fdb_key key; 263 struct hlist_node fdb_node; 264 unsigned long flags; 265 266 /* write-heavy members should not affect lookups */ 267 unsigned long updated ____cacheline_aligned_in_smp; 268 unsigned long used; 269 270 struct rcu_head rcu; 271 }; 272 273 #define MDB_PG_FLAGS_PERMANENT BIT(0) 274 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 275 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 276 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 277 #define MDB_PG_FLAGS_BLOCKED BIT(4) 278 279 #define PG_SRC_ENT_LIMIT 32 280 281 #define BR_SGRP_F_DELETE BIT(0) 282 #define BR_SGRP_F_SEND BIT(1) 283 #define BR_SGRP_F_INSTALLED BIT(2) 284 285 struct net_bridge_mcast_gc { 286 struct hlist_node gc_node; 287 void (*destroy)(struct net_bridge_mcast_gc *gc); 288 }; 289 290 struct net_bridge_group_src { 291 struct hlist_node node; 292 293 struct br_ip addr; 294 struct net_bridge_port_group *pg; 295 u8 flags; 296 u8 src_query_rexmit_cnt; 297 struct timer_list timer; 298 299 struct net_bridge *br; 300 struct net_bridge_mcast_gc mcast_gc; 301 struct rcu_head rcu; 302 }; 303 304 struct net_bridge_port_group_sg_key { 305 struct net_bridge_port *port; 306 struct br_ip addr; 307 }; 308 309 struct net_bridge_port_group { 310 struct net_bridge_port_group __rcu *next; 311 struct net_bridge_port_group_sg_key key; 312 unsigned char eth_addr[ETH_ALEN] __aligned(2); 313 unsigned char flags; 314 unsigned char filter_mode; 315 unsigned char grp_query_rexmit_cnt; 316 unsigned char rt_protocol; 317 318 struct hlist_head src_list; 319 unsigned int src_ents; 320 struct timer_list timer; 321 struct timer_list rexmit_timer; 322 struct hlist_node mglist; 323 struct rb_root eht_set_tree; 324 struct rb_root eht_host_tree; 325 326 struct rhash_head rhnode; 327 struct net_bridge_mcast_gc mcast_gc; 328 struct rcu_head rcu; 329 }; 330 331 struct net_bridge_mdb_entry { 332 struct rhash_head rhnode; 333 struct net_bridge *br; 334 struct net_bridge_port_group __rcu *ports; 335 struct br_ip addr; 336 bool host_joined; 337 338 struct timer_list timer; 339 struct hlist_node mdb_node; 340 341 struct net_bridge_mcast_gc mcast_gc; 342 struct rcu_head rcu; 343 }; 344 345 struct net_bridge_port { 346 struct net_bridge *br; 347 struct net_device *dev; 348 struct list_head list; 349 350 unsigned long flags; 351 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 352 struct net_bridge_vlan_group __rcu *vlgrp; 353 #endif 354 struct net_bridge_port __rcu *backup_port; 355 356 /* STP */ 357 u8 priority; 358 u8 state; 359 u16 port_no; 360 unsigned char topology_change_ack; 361 unsigned char config_pending; 362 port_id port_id; 363 port_id designated_port; 364 bridge_id designated_root; 365 bridge_id designated_bridge; 366 u32 path_cost; 367 u32 designated_cost; 368 unsigned long designated_age; 369 370 struct timer_list forward_delay_timer; 371 struct timer_list hold_timer; 372 struct timer_list message_age_timer; 373 struct kobject kobj; 374 struct rcu_head rcu; 375 376 struct net_bridge_mcast_port multicast_ctx; 377 378 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 379 struct bridge_mcast_stats __percpu *mcast_stats; 380 381 u32 multicast_eht_hosts_limit; 382 u32 multicast_eht_hosts_cnt; 383 struct hlist_head mglist; 384 #endif 385 386 #ifdef CONFIG_SYSFS 387 char sysfs_name[IFNAMSIZ]; 388 #endif 389 390 #ifdef CONFIG_NET_POLL_CONTROLLER 391 struct netpoll *np; 392 #endif 393 #ifdef CONFIG_NET_SWITCHDEV 394 /* Identifier used to group ports that share the same switchdev 395 * hardware domain. 396 */ 397 int hwdom; 398 int offload_count; 399 struct netdev_phys_item_id ppid; 400 #endif 401 u16 group_fwd_mask; 402 u16 backup_redirected_cnt; 403 404 struct bridge_stp_xstats stp_xstats; 405 }; 406 407 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 408 409 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 410 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 411 412 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 413 { 414 return rcu_dereference(dev->rx_handler_data); 415 } 416 417 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 418 { 419 return netif_is_bridge_port(dev) ? 420 rtnl_dereference(dev->rx_handler_data) : NULL; 421 } 422 423 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 424 { 425 return netif_is_bridge_port(dev) ? 426 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 427 } 428 429 enum net_bridge_opts { 430 BROPT_VLAN_ENABLED, 431 BROPT_VLAN_STATS_ENABLED, 432 BROPT_NF_CALL_IPTABLES, 433 BROPT_NF_CALL_IP6TABLES, 434 BROPT_NF_CALL_ARPTABLES, 435 BROPT_GROUP_ADDR_SET, 436 BROPT_MULTICAST_ENABLED, 437 BROPT_MULTICAST_QUERY_USE_IFADDR, 438 BROPT_MULTICAST_STATS_ENABLED, 439 BROPT_HAS_IPV6_ADDR, 440 BROPT_NEIGH_SUPPRESS_ENABLED, 441 BROPT_MTU_SET_BY_USER, 442 BROPT_VLAN_STATS_PER_PORT, 443 BROPT_NO_LL_LEARN, 444 BROPT_VLAN_BRIDGE_BINDING, 445 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 446 }; 447 448 struct net_bridge { 449 spinlock_t lock; 450 spinlock_t hash_lock; 451 struct hlist_head frame_type_list; 452 struct net_device *dev; 453 unsigned long options; 454 /* These fields are accessed on each packet */ 455 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 456 __be16 vlan_proto; 457 u16 default_pvid; 458 struct net_bridge_vlan_group __rcu *vlgrp; 459 #endif 460 461 struct rhashtable fdb_hash_tbl; 462 struct list_head port_list; 463 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 464 union { 465 struct rtable fake_rtable; 466 struct rt6_info fake_rt6_info; 467 }; 468 #endif 469 u16 group_fwd_mask; 470 u16 group_fwd_mask_required; 471 472 /* STP */ 473 bridge_id designated_root; 474 bridge_id bridge_id; 475 unsigned char topology_change; 476 unsigned char topology_change_detected; 477 u16 root_port; 478 unsigned long max_age; 479 unsigned long hello_time; 480 unsigned long forward_delay; 481 unsigned long ageing_time; 482 unsigned long bridge_max_age; 483 unsigned long bridge_hello_time; 484 unsigned long bridge_forward_delay; 485 unsigned long bridge_ageing_time; 486 u32 root_path_cost; 487 488 u8 group_addr[ETH_ALEN]; 489 490 enum { 491 BR_NO_STP, /* no spanning tree */ 492 BR_KERNEL_STP, /* old STP in kernel */ 493 BR_USER_STP, /* new RSTP in userspace */ 494 } stp_enabled; 495 496 struct net_bridge_mcast multicast_ctx; 497 498 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 499 struct bridge_mcast_stats __percpu *mcast_stats; 500 501 u32 hash_max; 502 503 spinlock_t multicast_lock; 504 505 struct rhashtable mdb_hash_tbl; 506 struct rhashtable sg_port_tbl; 507 508 struct hlist_head mcast_gc_list; 509 struct hlist_head mdb_list; 510 511 struct work_struct mcast_gc_work; 512 #endif 513 514 struct timer_list hello_timer; 515 struct timer_list tcn_timer; 516 struct timer_list topology_change_timer; 517 struct delayed_work gc_work; 518 struct kobject *ifobj; 519 u32 auto_cnt; 520 521 #ifdef CONFIG_NET_SWITCHDEV 522 /* Counter used to make sure that hardware domains get unique 523 * identifiers in case a bridge spans multiple switchdev instances. 524 */ 525 int last_hwdom; 526 /* Bit mask of hardware domain numbers in use */ 527 unsigned long busy_hwdoms; 528 #endif 529 struct hlist_head fdb_list; 530 531 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 532 struct hlist_head mrp_list; 533 #endif 534 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 535 struct hlist_head mep_list; 536 #endif 537 }; 538 539 struct br_input_skb_cb { 540 struct net_device *brdev; 541 542 u16 frag_max_size; 543 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 544 u8 igmp; 545 u8 mrouters_only:1; 546 #endif 547 u8 proxyarp_replied:1; 548 u8 src_port_isolated:1; 549 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 550 u8 vlan_filtered:1; 551 #endif 552 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 553 u8 br_netfilter_broute:1; 554 #endif 555 556 #ifdef CONFIG_NET_SWITCHDEV 557 /* Set if TX data plane offloading is used towards at least one 558 * hardware domain. 559 */ 560 u8 tx_fwd_offload:1; 561 /* The switchdev hardware domain from which this packet was received. 562 * If skb->offload_fwd_mark was set, then this packet was already 563 * forwarded by hardware to the other ports in the source hardware 564 * domain, otherwise it wasn't. 565 */ 566 int src_hwdom; 567 /* Bit mask of hardware domains towards this packet has already been 568 * transmitted using the TX data plane offload. 569 */ 570 unsigned long fwd_hwdoms; 571 #endif 572 }; 573 574 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 575 576 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 577 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 578 #else 579 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 580 #endif 581 582 #define br_printk(level, br, format, args...) \ 583 printk(level "%s: " format, (br)->dev->name, ##args) 584 585 #define br_err(__br, format, args...) \ 586 br_printk(KERN_ERR, __br, format, ##args) 587 #define br_warn(__br, format, args...) \ 588 br_printk(KERN_WARNING, __br, format, ##args) 589 #define br_notice(__br, format, args...) \ 590 br_printk(KERN_NOTICE, __br, format, ##args) 591 #define br_info(__br, format, args...) \ 592 br_printk(KERN_INFO, __br, format, ##args) 593 594 #define br_debug(br, format, args...) \ 595 pr_debug("%s: " format, (br)->dev->name, ##args) 596 597 /* called under bridge lock */ 598 static inline int br_is_root_bridge(const struct net_bridge *br) 599 { 600 return !memcmp(&br->bridge_id, &br->designated_root, 8); 601 } 602 603 /* check if a VLAN entry is global */ 604 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 605 { 606 return v->flags & BRIDGE_VLAN_INFO_MASTER; 607 } 608 609 /* check if a VLAN entry is used by the bridge */ 610 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 611 { 612 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 613 } 614 615 /* check if we should use the vlan entry, returns false if it's only context */ 616 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 617 { 618 if (br_vlan_is_master(v)) { 619 if (br_vlan_is_brentry(v)) 620 return true; 621 else 622 return false; 623 } 624 625 return true; 626 } 627 628 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 629 { 630 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 631 } 632 633 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 634 { 635 bool ret = vid > 0 && vid < VLAN_VID_MASK; 636 637 if (!ret) 638 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 639 640 return ret; 641 } 642 643 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 644 const struct bridge_vlan_info *last, 645 struct netlink_ext_ack *extack) 646 { 647 /* pvid flag is not allowed in ranges */ 648 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 649 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 650 return false; 651 } 652 653 /* when cur is the range end, check if: 654 * - it has range start flag 655 * - range ids are invalid (end is equal to or before start) 656 */ 657 if (last) { 658 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 659 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 660 return false; 661 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 662 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 663 return false; 664 } else if (cur->vid <= last->vid) { 665 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 666 return false; 667 } 668 } 669 670 /* check for required range flags */ 671 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 672 BRIDGE_VLAN_INFO_RANGE_END))) { 673 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 674 return false; 675 } 676 677 return true; 678 } 679 680 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 681 { 682 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 683 684 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 685 if (!br_vlan_is_master(v)) 686 mcast_router = v->port_mcast_ctx.multicast_router; 687 else 688 mcast_router = v->br_mcast_ctx.multicast_router; 689 #endif 690 691 return mcast_router; 692 } 693 694 static inline int br_afspec_cmd_to_rtm(int cmd) 695 { 696 switch (cmd) { 697 case RTM_SETLINK: 698 return RTM_NEWVLAN; 699 case RTM_DELLINK: 700 return RTM_DELVLAN; 701 } 702 703 return 0; 704 } 705 706 static inline int br_opt_get(const struct net_bridge *br, 707 enum net_bridge_opts opt) 708 { 709 return test_bit(opt, &br->options); 710 } 711 712 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 713 struct netlink_ext_ack *extack); 714 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 715 int br_boolopt_multi_toggle(struct net_bridge *br, 716 struct br_boolopt_multi *bm, 717 struct netlink_ext_ack *extack); 718 void br_boolopt_multi_get(const struct net_bridge *br, 719 struct br_boolopt_multi *bm); 720 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 721 722 /* br_device.c */ 723 void br_dev_setup(struct net_device *dev); 724 void br_dev_delete(struct net_device *dev, struct list_head *list); 725 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 726 #ifdef CONFIG_NET_POLL_CONTROLLER 727 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 728 struct sk_buff *skb) 729 { 730 netpoll_send_skb(p->np, skb); 731 } 732 733 int br_netpoll_enable(struct net_bridge_port *p); 734 void br_netpoll_disable(struct net_bridge_port *p); 735 #else 736 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 737 struct sk_buff *skb) 738 { 739 } 740 741 static inline int br_netpoll_enable(struct net_bridge_port *p) 742 { 743 return 0; 744 } 745 746 static inline void br_netpoll_disable(struct net_bridge_port *p) 747 { 748 } 749 #endif 750 751 /* br_fdb.c */ 752 int br_fdb_init(void); 753 void br_fdb_fini(void); 754 int br_fdb_hash_init(struct net_bridge *br); 755 void br_fdb_hash_fini(struct net_bridge *br); 756 void br_fdb_flush(struct net_bridge *br); 757 void br_fdb_find_delete_local(struct net_bridge *br, 758 const struct net_bridge_port *p, 759 const unsigned char *addr, u16 vid); 760 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 761 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 762 void br_fdb_cleanup(struct work_struct *work); 763 void br_fdb_delete_by_port(struct net_bridge *br, 764 const struct net_bridge_port *p, u16 vid, int do_all); 765 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 766 const unsigned char *addr, 767 __u16 vid); 768 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 769 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 770 unsigned long off); 771 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 772 const unsigned char *addr, u16 vid); 773 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 774 const unsigned char *addr, u16 vid, unsigned long flags); 775 776 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 777 struct net_device *dev, const unsigned char *addr, u16 vid); 778 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 779 const unsigned char *addr, u16 vid, u16 nlh_flags, 780 struct netlink_ext_ack *extack); 781 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 782 struct net_device *dev, struct net_device *fdev, int *idx); 783 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 784 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 785 struct netlink_ext_ack *extack); 786 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 787 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 788 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 789 const unsigned char *addr, u16 vid, 790 bool swdev_notify); 791 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 792 const unsigned char *addr, u16 vid, 793 bool swdev_notify); 794 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 795 const unsigned char *addr, u16 vid, bool offloaded); 796 797 /* br_forward.c */ 798 enum br_pkt_type { 799 BR_PKT_UNICAST, 800 BR_PKT_MULTICAST, 801 BR_PKT_BROADCAST 802 }; 803 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 804 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 805 bool local_rcv, bool local_orig); 806 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 807 void br_flood(struct net_bridge *br, struct sk_buff *skb, 808 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 809 810 /* return true if both source port and dest port are isolated */ 811 static inline bool br_skb_isolated(const struct net_bridge_port *to, 812 const struct sk_buff *skb) 813 { 814 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 815 (to->flags & BR_ISOLATED); 816 } 817 818 /* br_if.c */ 819 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 820 int br_add_bridge(struct net *net, const char *name); 821 int br_del_bridge(struct net *net, const char *name); 822 int br_add_if(struct net_bridge *br, struct net_device *dev, 823 struct netlink_ext_ack *extack); 824 int br_del_if(struct net_bridge *br, struct net_device *dev); 825 void br_mtu_auto_adjust(struct net_bridge *br); 826 netdev_features_t br_features_recompute(struct net_bridge *br, 827 netdev_features_t features); 828 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 829 void br_manage_promisc(struct net_bridge *br); 830 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 831 832 /* br_input.c */ 833 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 834 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 835 836 struct br_frame_type { 837 __be16 type; 838 int (*frame_handler)(struct net_bridge_port *port, 839 struct sk_buff *skb); 840 struct hlist_node list; 841 }; 842 843 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 844 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 845 846 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 847 { 848 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 849 } 850 851 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 852 { 853 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 854 } 855 856 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 857 { 858 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 859 } 860 861 static inline struct net_bridge_port * 862 br_port_get_check_rtnl(const struct net_device *dev) 863 { 864 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 865 } 866 867 /* br_ioctl.c */ 868 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 869 void __user *data, int cmd); 870 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 871 struct ifreq *ifr, void __user *uarg); 872 873 /* br_multicast.c */ 874 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 875 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 876 struct net_bridge_mcast_port **pmctx, 877 struct net_bridge_vlan *vlan, 878 struct sk_buff *skb, u16 vid); 879 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 880 struct sk_buff *skb, u16 vid); 881 int br_multicast_add_port(struct net_bridge_port *port); 882 void br_multicast_del_port(struct net_bridge_port *port); 883 void br_multicast_enable_port(struct net_bridge_port *port); 884 void br_multicast_disable_port(struct net_bridge_port *port); 885 void br_multicast_init(struct net_bridge *br); 886 void br_multicast_join_snoopers(struct net_bridge *br); 887 void br_multicast_leave_snoopers(struct net_bridge *br); 888 void br_multicast_open(struct net_bridge *br); 889 void br_multicast_stop(struct net_bridge *br); 890 void br_multicast_dev_del(struct net_bridge *br); 891 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 892 struct net_bridge_mcast *brmctx, 893 bool local_rcv, bool local_orig); 894 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 895 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 896 unsigned long val); 897 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 898 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 899 struct netlink_ext_ack *extack); 900 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 901 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 902 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 903 unsigned long val); 904 #if IS_ENABLED(CONFIG_IPV6) 905 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 906 unsigned long val); 907 #endif 908 struct net_bridge_mdb_entry * 909 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 910 struct net_bridge_mdb_entry * 911 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 912 struct net_bridge_port_group * 913 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 914 struct net_bridge_port_group __rcu *next, 915 unsigned char flags, const unsigned char *src, 916 u8 filter_mode, u8 rt_protocol); 917 int br_mdb_hash_init(struct net_bridge *br); 918 void br_mdb_hash_fini(struct net_bridge *br); 919 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 920 struct net_bridge_port_group *pg, int type); 921 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 922 int type); 923 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 924 struct net_bridge_port_group *pg, 925 struct net_bridge_port_group __rcu **pp); 926 void br_multicast_count(struct net_bridge *br, 927 const struct net_bridge_port *p, 928 const struct sk_buff *skb, u8 type, u8 dir); 929 int br_multicast_init_stats(struct net_bridge *br); 930 void br_multicast_uninit_stats(struct net_bridge *br); 931 void br_multicast_get_stats(const struct net_bridge *br, 932 const struct net_bridge_port *p, 933 struct br_mcast_stats *dest); 934 void br_mdb_init(void); 935 void br_mdb_uninit(void); 936 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 937 struct net_bridge_mdb_entry *mp, bool notify); 938 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 939 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 940 u8 filter_mode); 941 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 942 struct net_bridge_port_group *sg); 943 struct net_bridge_group_src * 944 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 945 void br_multicast_del_group_src(struct net_bridge_group_src *src, 946 bool fastleave); 947 void br_multicast_ctx_init(struct net_bridge *br, 948 struct net_bridge_vlan *vlan, 949 struct net_bridge_mcast *brmctx); 950 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 951 void br_multicast_port_ctx_init(struct net_bridge_port *port, 952 struct net_bridge_vlan *vlan, 953 struct net_bridge_mcast_port *pmctx); 954 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 955 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 956 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 957 struct netlink_ext_ack *extack); 958 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 959 960 int br_rports_fill_info(struct sk_buff *skb, 961 const struct net_bridge_mcast *brmctx); 962 int br_multicast_dump_querier_state(struct sk_buff *skb, 963 const struct net_bridge_mcast *brmctx, 964 int nest_attr); 965 size_t br_multicast_querier_state_size(void); 966 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 967 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 968 unsigned long val); 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 bool 1398 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1399 const struct net_bridge_mcast *brmctx2) 1400 { 1401 return true; 1402 } 1403 #endif 1404 1405 /* br_vlan.c */ 1406 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1407 bool br_allowed_ingress(const struct net_bridge *br, 1408 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1409 u16 *vid, u8 *state, 1410 struct net_bridge_vlan **vlan); 1411 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1412 const struct sk_buff *skb); 1413 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1414 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1415 const struct net_bridge_port *port, 1416 struct net_bridge_vlan_group *vg, 1417 struct sk_buff *skb); 1418 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1419 bool *changed, struct netlink_ext_ack *extack); 1420 int br_vlan_delete(struct net_bridge *br, u16 vid); 1421 void br_vlan_flush(struct net_bridge *br); 1422 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1423 void br_recalculate_fwd_mask(struct net_bridge *br); 1424 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1425 struct netlink_ext_ack *extack); 1426 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1427 struct netlink_ext_ack *extack); 1428 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1429 struct netlink_ext_ack *extack); 1430 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1431 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1432 int br_vlan_init(struct net_bridge *br); 1433 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1434 struct netlink_ext_ack *extack); 1435 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1436 struct netlink_ext_ack *extack); 1437 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1438 bool *changed, struct netlink_ext_ack *extack); 1439 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1440 void nbp_vlan_flush(struct net_bridge_port *port); 1441 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1442 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1443 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1444 struct pcpu_sw_netstats *stats); 1445 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1446 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1447 void *ptr); 1448 void br_vlan_rtnl_init(void); 1449 void br_vlan_rtnl_uninit(void); 1450 void br_vlan_notify(const struct net_bridge *br, 1451 const struct net_bridge_port *p, 1452 u16 vid, u16 vid_range, 1453 int cmd); 1454 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1455 const struct net_bridge_vlan *range_end); 1456 1457 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1458 struct net_device_path_ctx *ctx, 1459 struct net_device_path *path); 1460 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1461 struct net_bridge_port *dst, 1462 struct net_device_path *path); 1463 1464 static inline struct net_bridge_vlan_group *br_vlan_group( 1465 const struct net_bridge *br) 1466 { 1467 return rtnl_dereference(br->vlgrp); 1468 } 1469 1470 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1471 const struct net_bridge_port *p) 1472 { 1473 return rtnl_dereference(p->vlgrp); 1474 } 1475 1476 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1477 const struct net_bridge *br) 1478 { 1479 return rcu_dereference(br->vlgrp); 1480 } 1481 1482 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1483 const struct net_bridge_port *p) 1484 { 1485 return rcu_dereference(p->vlgrp); 1486 } 1487 1488 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1489 * skb, the vlan tag will always be present if the frame was tagged. 1490 */ 1491 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1492 { 1493 int err = 0; 1494 1495 if (skb_vlan_tag_present(skb)) { 1496 *vid = skb_vlan_tag_get_id(skb); 1497 } else { 1498 *vid = 0; 1499 err = -EINVAL; 1500 } 1501 1502 return err; 1503 } 1504 1505 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1506 { 1507 if (!vg) 1508 return 0; 1509 1510 smp_rmb(); 1511 return vg->pvid; 1512 } 1513 1514 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1515 { 1516 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1517 } 1518 #else 1519 static inline bool br_allowed_ingress(const struct net_bridge *br, 1520 struct net_bridge_vlan_group *vg, 1521 struct sk_buff *skb, 1522 u16 *vid, u8 *state, 1523 struct net_bridge_vlan **vlan) 1524 1525 { 1526 *vlan = NULL; 1527 return true; 1528 } 1529 1530 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1531 const struct sk_buff *skb) 1532 { 1533 return true; 1534 } 1535 1536 static inline bool br_should_learn(struct net_bridge_port *p, 1537 struct sk_buff *skb, u16 *vid) 1538 { 1539 return true; 1540 } 1541 1542 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1543 const struct net_bridge_port *port, 1544 struct net_bridge_vlan_group *vg, 1545 struct sk_buff *skb) 1546 { 1547 return skb; 1548 } 1549 1550 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1551 bool *changed, struct netlink_ext_ack *extack) 1552 { 1553 *changed = false; 1554 return -EOPNOTSUPP; 1555 } 1556 1557 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1558 { 1559 return -EOPNOTSUPP; 1560 } 1561 1562 static inline void br_vlan_flush(struct net_bridge *br) 1563 { 1564 } 1565 1566 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1567 { 1568 } 1569 1570 static inline int br_vlan_init(struct net_bridge *br) 1571 { 1572 return 0; 1573 } 1574 1575 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1576 bool *changed, struct netlink_ext_ack *extack) 1577 { 1578 *changed = false; 1579 return -EOPNOTSUPP; 1580 } 1581 1582 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1583 { 1584 return -EOPNOTSUPP; 1585 } 1586 1587 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1588 { 1589 } 1590 1591 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1592 u16 vid) 1593 { 1594 return NULL; 1595 } 1596 1597 static inline int nbp_vlan_init(struct net_bridge_port *port, 1598 struct netlink_ext_ack *extack) 1599 { 1600 return 0; 1601 } 1602 1603 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1604 { 1605 return 0; 1606 } 1607 1608 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1609 { 1610 return 0; 1611 } 1612 1613 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1614 unsigned long val, 1615 struct netlink_ext_ack *extack) 1616 { 1617 return -EOPNOTSUPP; 1618 } 1619 1620 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1621 u32 filter_mask) 1622 { 1623 return 0; 1624 } 1625 1626 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1627 struct net_device_path_ctx *ctx, 1628 struct net_device_path *path) 1629 { 1630 } 1631 1632 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1633 struct net_bridge_port *dst, 1634 struct net_device_path *path) 1635 { 1636 return 0; 1637 } 1638 1639 static inline struct net_bridge_vlan_group *br_vlan_group( 1640 const struct net_bridge *br) 1641 { 1642 return NULL; 1643 } 1644 1645 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1646 const struct net_bridge_port *p) 1647 { 1648 return NULL; 1649 } 1650 1651 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1652 const struct net_bridge *br) 1653 { 1654 return NULL; 1655 } 1656 1657 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1658 const struct net_bridge_port *p) 1659 { 1660 return NULL; 1661 } 1662 1663 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1664 struct pcpu_sw_netstats *stats) 1665 { 1666 } 1667 1668 static inline void br_vlan_port_event(struct net_bridge_port *p, 1669 unsigned long event) 1670 { 1671 } 1672 1673 static inline int br_vlan_bridge_event(struct net_device *dev, 1674 unsigned long event, void *ptr) 1675 { 1676 return 0; 1677 } 1678 1679 static inline void br_vlan_rtnl_init(void) 1680 { 1681 } 1682 1683 static inline void br_vlan_rtnl_uninit(void) 1684 { 1685 } 1686 1687 static inline void br_vlan_notify(const struct net_bridge *br, 1688 const struct net_bridge_port *p, 1689 u16 vid, u16 vid_range, 1690 int cmd) 1691 { 1692 } 1693 1694 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1695 const struct net_bridge_vlan *range_end) 1696 { 1697 return true; 1698 } 1699 1700 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1701 { 1702 return 0; 1703 } 1704 1705 #endif 1706 1707 /* br_vlan_options.c */ 1708 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1709 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1710 const struct net_bridge_vlan *range_end); 1711 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1712 size_t br_vlan_opts_nl_size(void); 1713 int br_vlan_process_options(const struct net_bridge *br, 1714 const struct net_bridge_port *p, 1715 struct net_bridge_vlan *range_start, 1716 struct net_bridge_vlan *range_end, 1717 struct nlattr **tb, 1718 struct netlink_ext_ack *extack); 1719 int br_vlan_rtm_process_global_options(struct net_device *dev, 1720 const struct nlattr *attr, 1721 int cmd, 1722 struct netlink_ext_ack *extack); 1723 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1724 const struct net_bridge_vlan *r_end); 1725 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1726 const struct net_bridge_vlan *v_opts); 1727 1728 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1729 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1730 { 1731 return READ_ONCE(v->state); 1732 } 1733 1734 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1735 { 1736 WRITE_ONCE(v->state, state); 1737 } 1738 1739 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1740 { 1741 return READ_ONCE(vg->pvid_state); 1742 } 1743 1744 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1745 u8 state) 1746 { 1747 WRITE_ONCE(vg->pvid_state, state); 1748 } 1749 1750 /* learn_allow is true at ingress and false at egress */ 1751 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1752 { 1753 switch (state) { 1754 case BR_STATE_LEARNING: 1755 return learn_allow; 1756 case BR_STATE_FORWARDING: 1757 return true; 1758 default: 1759 return false; 1760 } 1761 } 1762 #endif 1763 1764 struct nf_br_ops { 1765 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1766 }; 1767 extern const struct nf_br_ops __rcu *nf_br_ops; 1768 1769 /* br_netfilter.c */ 1770 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1771 int br_nf_core_init(void); 1772 void br_nf_core_fini(void); 1773 void br_netfilter_rtable_init(struct net_bridge *); 1774 #else 1775 static inline int br_nf_core_init(void) { return 0; } 1776 static inline void br_nf_core_fini(void) {} 1777 #define br_netfilter_rtable_init(x) 1778 #endif 1779 1780 /* br_stp.c */ 1781 void br_set_state(struct net_bridge_port *p, unsigned int state); 1782 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1783 void br_init_port(struct net_bridge_port *p); 1784 void br_become_designated_port(struct net_bridge_port *p); 1785 1786 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1787 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1788 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1789 int br_set_max_age(struct net_bridge *br, unsigned long x); 1790 int __set_ageing_time(struct net_device *dev, unsigned long t); 1791 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1792 1793 1794 /* br_stp_if.c */ 1795 void br_stp_enable_bridge(struct net_bridge *br); 1796 void br_stp_disable_bridge(struct net_bridge *br); 1797 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1798 struct netlink_ext_ack *extack); 1799 void br_stp_enable_port(struct net_bridge_port *p); 1800 void br_stp_disable_port(struct net_bridge_port *p); 1801 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1802 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1803 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1804 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1805 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1806 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1807 1808 /* br_stp_bpdu.c */ 1809 struct stp_proto; 1810 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1811 struct net_device *dev); 1812 1813 /* br_stp_timer.c */ 1814 void br_stp_timer_init(struct net_bridge *br); 1815 void br_stp_port_timer_init(struct net_bridge_port *p); 1816 unsigned long br_timer_value(const struct timer_list *timer); 1817 1818 /* br.c */ 1819 #if IS_ENABLED(CONFIG_ATM_LANE) 1820 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1821 #endif 1822 1823 /* br_mrp.c */ 1824 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1825 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1826 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1827 bool br_mrp_enabled(struct net_bridge *br); 1828 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1829 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1830 #else 1831 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1832 struct nlattr *attr, int cmd, 1833 struct netlink_ext_ack *extack) 1834 { 1835 return -EOPNOTSUPP; 1836 } 1837 1838 static inline bool br_mrp_enabled(struct net_bridge *br) 1839 { 1840 return false; 1841 } 1842 1843 static inline void br_mrp_port_del(struct net_bridge *br, 1844 struct net_bridge_port *p) 1845 { 1846 } 1847 1848 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1849 { 1850 return 0; 1851 } 1852 1853 #endif 1854 1855 /* br_cfm.c */ 1856 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1857 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1858 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1859 bool br_cfm_created(struct net_bridge *br); 1860 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1861 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1862 int br_cfm_status_fill_info(struct sk_buff *skb, 1863 struct net_bridge *br, 1864 bool getlink); 1865 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1866 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1867 #else 1868 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1869 struct nlattr *attr, int cmd, 1870 struct netlink_ext_ack *extack) 1871 { 1872 return -EOPNOTSUPP; 1873 } 1874 1875 static inline bool br_cfm_created(struct net_bridge *br) 1876 { 1877 return false; 1878 } 1879 1880 static inline void br_cfm_port_del(struct net_bridge *br, 1881 struct net_bridge_port *p) 1882 { 1883 } 1884 1885 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1886 { 1887 return -EOPNOTSUPP; 1888 } 1889 1890 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1891 struct net_bridge *br, 1892 bool getlink) 1893 { 1894 return -EOPNOTSUPP; 1895 } 1896 1897 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1898 { 1899 *count = 0; 1900 return -EOPNOTSUPP; 1901 } 1902 1903 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1904 { 1905 *count = 0; 1906 return -EOPNOTSUPP; 1907 } 1908 #endif 1909 1910 /* br_netlink.c */ 1911 extern struct rtnl_link_ops br_link_ops; 1912 int br_netlink_init(void); 1913 void br_netlink_fini(void); 1914 void br_ifinfo_notify(int event, const struct net_bridge *br, 1915 const struct net_bridge_port *port); 1916 void br_info_notify(int event, const struct net_bridge *br, 1917 const struct net_bridge_port *port, u32 filter); 1918 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1919 struct netlink_ext_ack *extack); 1920 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1921 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1922 u32 filter_mask, int nlflags); 1923 int br_process_vlan_info(struct net_bridge *br, 1924 struct net_bridge_port *p, int cmd, 1925 struct bridge_vlan_info *vinfo_curr, 1926 struct bridge_vlan_info **vinfo_last, 1927 bool *changed, 1928 struct netlink_ext_ack *extack); 1929 1930 #ifdef CONFIG_SYSFS 1931 /* br_sysfs_if.c */ 1932 extern const struct sysfs_ops brport_sysfs_ops; 1933 int br_sysfs_addif(struct net_bridge_port *p); 1934 int br_sysfs_renameif(struct net_bridge_port *p); 1935 1936 /* br_sysfs_br.c */ 1937 int br_sysfs_addbr(struct net_device *dev); 1938 void br_sysfs_delbr(struct net_device *dev); 1939 1940 #else 1941 1942 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1943 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1944 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1945 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1946 #endif /* CONFIG_SYSFS */ 1947 1948 /* br_switchdev.c */ 1949 #ifdef CONFIG_NET_SWITCHDEV 1950 int br_switchdev_port_offload(struct net_bridge_port *p, 1951 struct net_device *dev, const void *ctx, 1952 struct notifier_block *atomic_nb, 1953 struct notifier_block *blocking_nb, 1954 bool tx_fwd_offload, 1955 struct netlink_ext_ack *extack); 1956 1957 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1958 struct notifier_block *atomic_nb, 1959 struct notifier_block *blocking_nb); 1960 1961 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1962 1963 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1964 1965 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1966 struct sk_buff *skb); 1967 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1968 struct sk_buff *skb); 1969 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1970 struct sk_buff *skb); 1971 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1972 const struct sk_buff *skb); 1973 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1974 unsigned long flags, 1975 unsigned long mask, 1976 struct netlink_ext_ack *extack); 1977 void br_switchdev_fdb_notify(struct net_bridge *br, 1978 const struct net_bridge_fdb_entry *fdb, int type); 1979 void br_switchdev_mdb_notify(struct net_device *dev, 1980 struct net_bridge_mdb_entry *mp, 1981 struct net_bridge_port_group *pg, 1982 int type); 1983 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1984 struct netlink_ext_ack *extack); 1985 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1986 void br_switchdev_init(struct net_bridge *br); 1987 1988 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1989 { 1990 skb->offload_fwd_mark = 0; 1991 } 1992 #else 1993 static inline int 1994 br_switchdev_port_offload(struct net_bridge_port *p, 1995 struct net_device *dev, const void *ctx, 1996 struct notifier_block *atomic_nb, 1997 struct notifier_block *blocking_nb, 1998 bool tx_fwd_offload, 1999 struct netlink_ext_ack *extack) 2000 { 2001 return -EOPNOTSUPP; 2002 } 2003 2004 static inline void 2005 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2006 struct notifier_block *atomic_nb, 2007 struct notifier_block *blocking_nb) 2008 { 2009 } 2010 2011 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2012 { 2013 return false; 2014 } 2015 2016 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2017 { 2018 } 2019 2020 static inline void 2021 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2022 struct sk_buff *skb) 2023 { 2024 } 2025 2026 static inline void 2027 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2028 struct sk_buff *skb) 2029 { 2030 } 2031 2032 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2033 struct sk_buff *skb) 2034 { 2035 } 2036 2037 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2038 const struct sk_buff *skb) 2039 { 2040 return true; 2041 } 2042 2043 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2044 unsigned long flags, 2045 unsigned long mask, 2046 struct netlink_ext_ack *extack) 2047 { 2048 return 0; 2049 } 2050 2051 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2052 u16 vid, u16 flags, 2053 struct netlink_ext_ack *extack) 2054 { 2055 return -EOPNOTSUPP; 2056 } 2057 2058 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2059 { 2060 return -EOPNOTSUPP; 2061 } 2062 2063 static inline void 2064 br_switchdev_fdb_notify(struct net_bridge *br, 2065 const struct net_bridge_fdb_entry *fdb, int type) 2066 { 2067 } 2068 2069 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2070 struct net_bridge_mdb_entry *mp, 2071 struct net_bridge_port_group *pg, 2072 int type) 2073 { 2074 } 2075 2076 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2077 { 2078 } 2079 2080 static inline void br_switchdev_init(struct net_bridge *br) 2081 { 2082 } 2083 2084 #endif /* CONFIG_NET_SWITCHDEV */ 2085 2086 /* br_arp_nd_proxy.c */ 2087 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2088 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2089 u16 vid, struct net_bridge_port *p); 2090 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2091 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2092 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2093 #endif 2094