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 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 33 34 #define BR_HWDOM_MAX BITS_PER_LONG 35 36 #define BR_VERSION "2.3" 37 38 /* Control of forwarding link local multicast */ 39 #define BR_GROUPFWD_DEFAULT 0 40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 41 enum { 42 BR_GROUPFWD_STP = BIT(0), 43 BR_GROUPFWD_MACPAUSE = BIT(1), 44 BR_GROUPFWD_LACP = BIT(2), 45 }; 46 47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 48 BR_GROUPFWD_LACP) 49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 50 #define BR_GROUPFWD_8021AD 0xB801u 51 52 /* Path to usermode spanning tree program */ 53 #define BR_STP_PROG "/sbin/bridge-stp" 54 55 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 56 57 typedef struct bridge_id bridge_id; 58 typedef struct mac_addr mac_addr; 59 typedef __u16 port_id; 60 61 struct bridge_id { 62 unsigned char prio[2]; 63 unsigned char addr[ETH_ALEN]; 64 }; 65 66 struct mac_addr { 67 unsigned char addr[ETH_ALEN]; 68 }; 69 70 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 71 /* our own querier */ 72 struct bridge_mcast_own_query { 73 struct timer_list timer; 74 u32 startup_sent; 75 }; 76 77 /* other querier */ 78 struct bridge_mcast_other_query { 79 struct timer_list timer; 80 unsigned long delay_time; 81 }; 82 83 /* selected querier */ 84 struct bridge_mcast_querier { 85 struct br_ip addr; 86 int port_ifidx; 87 seqcount_spinlock_t seq; 88 }; 89 90 /* IGMP/MLD statistics */ 91 struct bridge_mcast_stats { 92 struct br_mcast_stats mstats; 93 struct u64_stats_sync syncp; 94 }; 95 #endif 96 97 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 98 struct net_bridge_mcast_port { 99 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 100 struct net_bridge_port *port; 101 struct net_bridge_vlan *vlan; 102 103 struct bridge_mcast_own_query ip4_own_query; 104 struct timer_list ip4_mc_router_timer; 105 struct hlist_node ip4_rlist; 106 #if IS_ENABLED(CONFIG_IPV6) 107 struct bridge_mcast_own_query ip6_own_query; 108 struct timer_list ip6_mc_router_timer; 109 struct hlist_node ip6_rlist; 110 #endif /* IS_ENABLED(CONFIG_IPV6) */ 111 unsigned char multicast_router; 112 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 113 }; 114 115 /* net_bridge_mcast must be always defined due to forwarding stubs */ 116 struct net_bridge_mcast { 117 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 118 struct net_bridge *br; 119 struct net_bridge_vlan *vlan; 120 121 u32 multicast_last_member_count; 122 u32 multicast_startup_query_count; 123 124 u8 multicast_querier; 125 u8 multicast_igmp_version; 126 u8 multicast_router; 127 #if IS_ENABLED(CONFIG_IPV6) 128 u8 multicast_mld_version; 129 #endif 130 unsigned long multicast_last_member_interval; 131 unsigned long multicast_membership_interval; 132 unsigned long multicast_querier_interval; 133 unsigned long multicast_query_interval; 134 unsigned long multicast_query_response_interval; 135 unsigned long multicast_startup_query_interval; 136 struct hlist_head ip4_mc_router_list; 137 struct timer_list ip4_mc_router_timer; 138 struct bridge_mcast_other_query ip4_other_query; 139 struct bridge_mcast_own_query ip4_own_query; 140 struct bridge_mcast_querier ip4_querier; 141 #if IS_ENABLED(CONFIG_IPV6) 142 struct hlist_head ip6_mc_router_list; 143 struct timer_list ip6_mc_router_timer; 144 struct bridge_mcast_other_query ip6_other_query; 145 struct bridge_mcast_own_query ip6_own_query; 146 struct bridge_mcast_querier ip6_querier; 147 #endif /* IS_ENABLED(CONFIG_IPV6) */ 148 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 149 }; 150 151 struct br_tunnel_info { 152 __be64 tunnel_id; 153 struct metadata_dst __rcu *tunnel_dst; 154 }; 155 156 /* private vlan flags */ 157 enum { 158 BR_VLFLAG_PER_PORT_STATS = BIT(0), 159 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 160 BR_VLFLAG_MCAST_ENABLED = BIT(2), 161 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 162 }; 163 164 /** 165 * struct net_bridge_vlan - per-vlan entry 166 * 167 * @vnode: rhashtable member 168 * @vid: VLAN id 169 * @flags: bridge vlan flags 170 * @priv_flags: private (in-kernel) bridge vlan flags 171 * @state: STP state (e.g. blocking, learning, forwarding) 172 * @stats: per-cpu VLAN statistics 173 * @br: if MASTER flag set, this points to a bridge struct 174 * @port: if MASTER flag unset, this points to a port struct 175 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 176 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 177 * for this VLAN entry 178 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 179 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 180 * context 181 * @vlist: sorted list of VLAN entries 182 * @rcu: used for entry destruction 183 * 184 * This structure is shared between the global per-VLAN entries contained in 185 * the bridge rhashtable and the local per-port per-VLAN entries contained in 186 * the port's rhashtable. The union entries should be interpreted depending on 187 * the entry flags that are set. 188 */ 189 struct net_bridge_vlan { 190 struct rhash_head vnode; 191 struct rhash_head tnode; 192 u16 vid; 193 u16 flags; 194 u16 priv_flags; 195 u8 state; 196 struct pcpu_sw_netstats __percpu *stats; 197 union { 198 struct net_bridge *br; 199 struct net_bridge_port *port; 200 }; 201 union { 202 refcount_t refcnt; 203 struct net_bridge_vlan *brvlan; 204 }; 205 206 struct br_tunnel_info tinfo; 207 208 union { 209 struct net_bridge_mcast br_mcast_ctx; 210 struct net_bridge_mcast_port port_mcast_ctx; 211 }; 212 213 struct list_head vlist; 214 215 struct rcu_head rcu; 216 }; 217 218 /** 219 * struct net_bridge_vlan_group 220 * 221 * @vlan_hash: VLAN entry rhashtable 222 * @vlan_list: sorted VLAN entry list 223 * @num_vlans: number of total VLAN entries 224 * @pvid: PVID VLAN id 225 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 226 * 227 * IMPORTANT: Be careful when checking if there're VLAN entries using list 228 * primitives because the bridge can have entries in its list which 229 * are just for global context but not for filtering, i.e. they have 230 * the master flag set but not the brentry flag. If you have to check 231 * if there're "real" entries in the bridge please test @num_vlans 232 */ 233 struct net_bridge_vlan_group { 234 struct rhashtable vlan_hash; 235 struct rhashtable tunnel_hash; 236 struct list_head vlan_list; 237 u16 num_vlans; 238 u16 pvid; 239 u8 pvid_state; 240 }; 241 242 /* bridge fdb flags */ 243 enum { 244 BR_FDB_LOCAL, 245 BR_FDB_STATIC, 246 BR_FDB_STICKY, 247 BR_FDB_ADDED_BY_USER, 248 BR_FDB_ADDED_BY_EXT_LEARN, 249 BR_FDB_OFFLOADED, 250 BR_FDB_NOTIFY, 251 BR_FDB_NOTIFY_INACTIVE 252 }; 253 254 struct net_bridge_fdb_key { 255 mac_addr addr; 256 u16 vlan_id; 257 }; 258 259 struct net_bridge_fdb_entry { 260 struct rhash_head rhnode; 261 struct net_bridge_port *dst; 262 263 struct net_bridge_fdb_key key; 264 struct hlist_node fdb_node; 265 unsigned long flags; 266 267 /* write-heavy members should not affect lookups */ 268 unsigned long updated ____cacheline_aligned_in_smp; 269 unsigned long used; 270 271 struct rcu_head rcu; 272 }; 273 274 #define MDB_PG_FLAGS_PERMANENT BIT(0) 275 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 276 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 277 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 278 #define MDB_PG_FLAGS_BLOCKED BIT(4) 279 280 #define PG_SRC_ENT_LIMIT 32 281 282 #define BR_SGRP_F_DELETE BIT(0) 283 #define BR_SGRP_F_SEND BIT(1) 284 #define BR_SGRP_F_INSTALLED BIT(2) 285 286 struct net_bridge_mcast_gc { 287 struct hlist_node gc_node; 288 void (*destroy)(struct net_bridge_mcast_gc *gc); 289 }; 290 291 struct net_bridge_group_src { 292 struct hlist_node node; 293 294 struct br_ip addr; 295 struct net_bridge_port_group *pg; 296 u8 flags; 297 u8 src_query_rexmit_cnt; 298 struct timer_list timer; 299 300 struct net_bridge *br; 301 struct net_bridge_mcast_gc mcast_gc; 302 struct rcu_head rcu; 303 }; 304 305 struct net_bridge_port_group_sg_key { 306 struct net_bridge_port *port; 307 struct br_ip addr; 308 }; 309 310 struct net_bridge_port_group { 311 struct net_bridge_port_group __rcu *next; 312 struct net_bridge_port_group_sg_key key; 313 unsigned char eth_addr[ETH_ALEN] __aligned(2); 314 unsigned char flags; 315 unsigned char filter_mode; 316 unsigned char grp_query_rexmit_cnt; 317 unsigned char rt_protocol; 318 319 struct hlist_head src_list; 320 unsigned int src_ents; 321 struct timer_list timer; 322 struct timer_list rexmit_timer; 323 struct hlist_node mglist; 324 struct rb_root eht_set_tree; 325 struct rb_root eht_host_tree; 326 327 struct rhash_head rhnode; 328 struct net_bridge_mcast_gc mcast_gc; 329 struct rcu_head rcu; 330 }; 331 332 struct net_bridge_mdb_entry { 333 struct rhash_head rhnode; 334 struct net_bridge *br; 335 struct net_bridge_port_group __rcu *ports; 336 struct br_ip addr; 337 bool host_joined; 338 339 struct timer_list timer; 340 struct hlist_node mdb_node; 341 342 struct net_bridge_mcast_gc mcast_gc; 343 struct rcu_head rcu; 344 }; 345 346 struct net_bridge_port { 347 struct net_bridge *br; 348 struct net_device *dev; 349 struct list_head list; 350 351 unsigned long flags; 352 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 353 struct net_bridge_vlan_group __rcu *vlgrp; 354 #endif 355 struct net_bridge_port __rcu *backup_port; 356 357 /* STP */ 358 u8 priority; 359 u8 state; 360 u16 port_no; 361 unsigned char topology_change_ack; 362 unsigned char config_pending; 363 port_id port_id; 364 port_id designated_port; 365 bridge_id designated_root; 366 bridge_id designated_bridge; 367 u32 path_cost; 368 u32 designated_cost; 369 unsigned long designated_age; 370 371 struct timer_list forward_delay_timer; 372 struct timer_list hold_timer; 373 struct timer_list message_age_timer; 374 struct kobject kobj; 375 struct rcu_head rcu; 376 377 struct net_bridge_mcast_port multicast_ctx; 378 379 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 380 struct bridge_mcast_stats __percpu *mcast_stats; 381 382 u32 multicast_eht_hosts_limit; 383 u32 multicast_eht_hosts_cnt; 384 struct hlist_head mglist; 385 #endif 386 387 #ifdef CONFIG_SYSFS 388 char sysfs_name[IFNAMSIZ]; 389 #endif 390 391 #ifdef CONFIG_NET_POLL_CONTROLLER 392 struct netpoll *np; 393 #endif 394 #ifdef CONFIG_NET_SWITCHDEV 395 /* Identifier used to group ports that share the same switchdev 396 * hardware domain. 397 */ 398 int hwdom; 399 int offload_count; 400 struct netdev_phys_item_id ppid; 401 #endif 402 u16 group_fwd_mask; 403 u16 backup_redirected_cnt; 404 405 struct bridge_stp_xstats stp_xstats; 406 }; 407 408 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 409 410 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 411 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 412 413 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 414 { 415 return rcu_dereference(dev->rx_handler_data); 416 } 417 418 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 419 { 420 return netif_is_bridge_port(dev) ? 421 rtnl_dereference(dev->rx_handler_data) : NULL; 422 } 423 424 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 425 { 426 return netif_is_bridge_port(dev) ? 427 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 428 } 429 430 enum net_bridge_opts { 431 BROPT_VLAN_ENABLED, 432 BROPT_VLAN_STATS_ENABLED, 433 BROPT_NF_CALL_IPTABLES, 434 BROPT_NF_CALL_IP6TABLES, 435 BROPT_NF_CALL_ARPTABLES, 436 BROPT_GROUP_ADDR_SET, 437 BROPT_MULTICAST_ENABLED, 438 BROPT_MULTICAST_QUERY_USE_IFADDR, 439 BROPT_MULTICAST_STATS_ENABLED, 440 BROPT_HAS_IPV6_ADDR, 441 BROPT_NEIGH_SUPPRESS_ENABLED, 442 BROPT_MTU_SET_BY_USER, 443 BROPT_VLAN_STATS_PER_PORT, 444 BROPT_NO_LL_LEARN, 445 BROPT_VLAN_BRIDGE_BINDING, 446 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 447 }; 448 449 struct net_bridge { 450 spinlock_t lock; 451 spinlock_t hash_lock; 452 struct hlist_head frame_type_list; 453 struct net_device *dev; 454 unsigned long options; 455 /* These fields are accessed on each packet */ 456 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 457 __be16 vlan_proto; 458 u16 default_pvid; 459 struct net_bridge_vlan_group __rcu *vlgrp; 460 #endif 461 462 struct rhashtable fdb_hash_tbl; 463 struct list_head port_list; 464 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 465 union { 466 struct rtable fake_rtable; 467 struct rt6_info fake_rt6_info; 468 }; 469 #endif 470 u16 group_fwd_mask; 471 u16 group_fwd_mask_required; 472 473 /* STP */ 474 bridge_id designated_root; 475 bridge_id bridge_id; 476 unsigned char topology_change; 477 unsigned char topology_change_detected; 478 u16 root_port; 479 unsigned long max_age; 480 unsigned long hello_time; 481 unsigned long forward_delay; 482 unsigned long ageing_time; 483 unsigned long bridge_max_age; 484 unsigned long bridge_hello_time; 485 unsigned long bridge_forward_delay; 486 unsigned long bridge_ageing_time; 487 u32 root_path_cost; 488 489 u8 group_addr[ETH_ALEN]; 490 491 enum { 492 BR_NO_STP, /* no spanning tree */ 493 BR_KERNEL_STP, /* old STP in kernel */ 494 BR_USER_STP, /* new RSTP in userspace */ 495 } stp_enabled; 496 497 struct net_bridge_mcast multicast_ctx; 498 499 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 500 struct bridge_mcast_stats __percpu *mcast_stats; 501 502 u32 hash_max; 503 504 spinlock_t multicast_lock; 505 506 struct rhashtable mdb_hash_tbl; 507 struct rhashtable sg_port_tbl; 508 509 struct hlist_head mcast_gc_list; 510 struct hlist_head mdb_list; 511 512 struct work_struct mcast_gc_work; 513 #endif 514 515 struct timer_list hello_timer; 516 struct timer_list tcn_timer; 517 struct timer_list topology_change_timer; 518 struct delayed_work gc_work; 519 struct kobject *ifobj; 520 u32 auto_cnt; 521 522 #ifdef CONFIG_NET_SWITCHDEV 523 /* Counter used to make sure that hardware domains get unique 524 * identifiers in case a bridge spans multiple switchdev instances. 525 */ 526 int last_hwdom; 527 /* Bit mask of hardware domain numbers in use */ 528 unsigned long busy_hwdoms; 529 #endif 530 struct hlist_head fdb_list; 531 532 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 533 struct hlist_head mrp_list; 534 #endif 535 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 536 struct hlist_head mep_list; 537 #endif 538 }; 539 540 struct br_input_skb_cb { 541 struct net_device *brdev; 542 543 u16 frag_max_size; 544 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 545 u8 igmp; 546 u8 mrouters_only:1; 547 #endif 548 u8 proxyarp_replied:1; 549 u8 src_port_isolated:1; 550 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 551 u8 vlan_filtered:1; 552 #endif 553 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 554 u8 br_netfilter_broute:1; 555 #endif 556 557 #ifdef CONFIG_NET_SWITCHDEV 558 /* Set if TX data plane offloading is used towards at least one 559 * hardware domain. 560 */ 561 u8 tx_fwd_offload:1; 562 /* The switchdev hardware domain from which this packet was received. 563 * If skb->offload_fwd_mark was set, then this packet was already 564 * forwarded by hardware to the other ports in the source hardware 565 * domain, otherwise it wasn't. 566 */ 567 int src_hwdom; 568 /* Bit mask of hardware domains towards this packet has already been 569 * transmitted using the TX data plane offload. 570 */ 571 unsigned long fwd_hwdoms; 572 #endif 573 }; 574 575 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 576 577 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 578 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 579 #else 580 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 581 #endif 582 583 #define br_printk(level, br, format, args...) \ 584 printk(level "%s: " format, (br)->dev->name, ##args) 585 586 #define br_err(__br, format, args...) \ 587 br_printk(KERN_ERR, __br, format, ##args) 588 #define br_warn(__br, format, args...) \ 589 br_printk(KERN_WARNING, __br, format, ##args) 590 #define br_notice(__br, format, args...) \ 591 br_printk(KERN_NOTICE, __br, format, ##args) 592 #define br_info(__br, format, args...) \ 593 br_printk(KERN_INFO, __br, format, ##args) 594 595 #define br_debug(br, format, args...) \ 596 pr_debug("%s: " format, (br)->dev->name, ##args) 597 598 /* called under bridge lock */ 599 static inline int br_is_root_bridge(const struct net_bridge *br) 600 { 601 return !memcmp(&br->bridge_id, &br->designated_root, 8); 602 } 603 604 /* check if a VLAN entry is global */ 605 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 606 { 607 return v->flags & BRIDGE_VLAN_INFO_MASTER; 608 } 609 610 /* check if a VLAN entry is used by the bridge */ 611 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 612 { 613 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 614 } 615 616 /* check if we should use the vlan entry, returns false if it's only context */ 617 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 618 { 619 if (br_vlan_is_master(v)) { 620 if (br_vlan_is_brentry(v)) 621 return true; 622 else 623 return false; 624 } 625 626 return true; 627 } 628 629 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 630 { 631 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 632 } 633 634 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 635 { 636 bool ret = vid > 0 && vid < VLAN_VID_MASK; 637 638 if (!ret) 639 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 640 641 return ret; 642 } 643 644 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 645 const struct bridge_vlan_info *last, 646 struct netlink_ext_ack *extack) 647 { 648 /* pvid flag is not allowed in ranges */ 649 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 650 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 651 return false; 652 } 653 654 /* when cur is the range end, check if: 655 * - it has range start flag 656 * - range ids are invalid (end is equal to or before start) 657 */ 658 if (last) { 659 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 660 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 661 return false; 662 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 663 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 664 return false; 665 } else if (cur->vid <= last->vid) { 666 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 667 return false; 668 } 669 } 670 671 /* check for required range flags */ 672 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 673 BRIDGE_VLAN_INFO_RANGE_END))) { 674 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 675 return false; 676 } 677 678 return true; 679 } 680 681 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 682 { 683 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 684 685 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 686 if (!br_vlan_is_master(v)) 687 mcast_router = v->port_mcast_ctx.multicast_router; 688 else 689 mcast_router = v->br_mcast_ctx.multicast_router; 690 #endif 691 692 return mcast_router; 693 } 694 695 static inline int br_afspec_cmd_to_rtm(int cmd) 696 { 697 switch (cmd) { 698 case RTM_SETLINK: 699 return RTM_NEWVLAN; 700 case RTM_DELLINK: 701 return RTM_DELVLAN; 702 } 703 704 return 0; 705 } 706 707 static inline int br_opt_get(const struct net_bridge *br, 708 enum net_bridge_opts opt) 709 { 710 return test_bit(opt, &br->options); 711 } 712 713 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 714 struct netlink_ext_ack *extack); 715 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 716 int br_boolopt_multi_toggle(struct net_bridge *br, 717 struct br_boolopt_multi *bm, 718 struct netlink_ext_ack *extack); 719 void br_boolopt_multi_get(const struct net_bridge *br, 720 struct br_boolopt_multi *bm); 721 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 722 723 /* br_device.c */ 724 void br_dev_setup(struct net_device *dev); 725 void br_dev_delete(struct net_device *dev, struct list_head *list); 726 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 727 #ifdef CONFIG_NET_POLL_CONTROLLER 728 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 729 struct sk_buff *skb) 730 { 731 netpoll_send_skb(p->np, skb); 732 } 733 734 int br_netpoll_enable(struct net_bridge_port *p); 735 void br_netpoll_disable(struct net_bridge_port *p); 736 #else 737 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 738 struct sk_buff *skb) 739 { 740 } 741 742 static inline int br_netpoll_enable(struct net_bridge_port *p) 743 { 744 return 0; 745 } 746 747 static inline void br_netpoll_disable(struct net_bridge_port *p) 748 { 749 } 750 #endif 751 752 /* br_fdb.c */ 753 int br_fdb_init(void); 754 void br_fdb_fini(void); 755 int br_fdb_hash_init(struct net_bridge *br); 756 void br_fdb_hash_fini(struct net_bridge *br); 757 void br_fdb_flush(struct net_bridge *br); 758 void br_fdb_find_delete_local(struct net_bridge *br, 759 const struct net_bridge_port *p, 760 const unsigned char *addr, u16 vid); 761 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 762 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 763 void br_fdb_cleanup(struct work_struct *work); 764 void br_fdb_delete_by_port(struct net_bridge *br, 765 const struct net_bridge_port *p, u16 vid, int do_all); 766 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 767 const unsigned char *addr, 768 __u16 vid); 769 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 770 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 771 unsigned long off); 772 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 773 const unsigned char *addr, u16 vid); 774 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 775 const unsigned char *addr, u16 vid, unsigned long flags); 776 777 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 778 struct net_device *dev, const unsigned char *addr, u16 vid); 779 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 780 const unsigned char *addr, u16 vid, u16 nlh_flags, 781 struct netlink_ext_ack *extack); 782 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 783 struct net_device *dev, struct net_device *fdev, int *idx); 784 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 785 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 786 struct netlink_ext_ack *extack); 787 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 788 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 789 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 790 const unsigned char *addr, u16 vid, 791 bool swdev_notify); 792 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 793 const unsigned char *addr, u16 vid, 794 bool swdev_notify); 795 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 796 const unsigned char *addr, u16 vid, bool offloaded); 797 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding, 798 struct notifier_block *nb); 799 800 /* br_forward.c */ 801 enum br_pkt_type { 802 BR_PKT_UNICAST, 803 BR_PKT_MULTICAST, 804 BR_PKT_BROADCAST 805 }; 806 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 807 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 808 bool local_rcv, bool local_orig); 809 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 810 void br_flood(struct net_bridge *br, struct sk_buff *skb, 811 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 812 813 /* return true if both source port and dest port are isolated */ 814 static inline bool br_skb_isolated(const struct net_bridge_port *to, 815 const struct sk_buff *skb) 816 { 817 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 818 (to->flags & BR_ISOLATED); 819 } 820 821 /* br_if.c */ 822 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 823 int br_add_bridge(struct net *net, const char *name); 824 int br_del_bridge(struct net *net, const char *name); 825 int br_add_if(struct net_bridge *br, struct net_device *dev, 826 struct netlink_ext_ack *extack); 827 int br_del_if(struct net_bridge *br, struct net_device *dev); 828 void br_mtu_auto_adjust(struct net_bridge *br); 829 netdev_features_t br_features_recompute(struct net_bridge *br, 830 netdev_features_t features); 831 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 832 void br_manage_promisc(struct net_bridge *br); 833 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 834 835 /* br_input.c */ 836 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 837 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 838 839 struct br_frame_type { 840 __be16 type; 841 int (*frame_handler)(struct net_bridge_port *port, 842 struct sk_buff *skb); 843 struct hlist_node list; 844 }; 845 846 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 847 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 848 849 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 850 { 851 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 852 } 853 854 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 855 { 856 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 857 } 858 859 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 860 { 861 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 862 } 863 864 static inline struct net_bridge_port * 865 br_port_get_check_rtnl(const struct net_device *dev) 866 { 867 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 868 } 869 870 /* br_ioctl.c */ 871 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 872 void __user *data, int cmd); 873 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 874 struct ifreq *ifr, void __user *uarg); 875 876 /* br_multicast.c */ 877 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 878 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 879 struct net_bridge_mcast_port **pmctx, 880 struct net_bridge_vlan *vlan, 881 struct sk_buff *skb, u16 vid); 882 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 883 struct sk_buff *skb, u16 vid); 884 int br_multicast_add_port(struct net_bridge_port *port); 885 void br_multicast_del_port(struct net_bridge_port *port); 886 void br_multicast_enable_port(struct net_bridge_port *port); 887 void br_multicast_disable_port(struct net_bridge_port *port); 888 void br_multicast_init(struct net_bridge *br); 889 void br_multicast_join_snoopers(struct net_bridge *br); 890 void br_multicast_leave_snoopers(struct net_bridge *br); 891 void br_multicast_open(struct net_bridge *br); 892 void br_multicast_stop(struct net_bridge *br); 893 void br_multicast_dev_del(struct net_bridge *br); 894 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 895 struct net_bridge_mcast *brmctx, 896 bool local_rcv, bool local_orig); 897 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 898 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 899 unsigned long val); 900 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 901 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 902 struct netlink_ext_ack *extack); 903 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 904 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 905 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 906 unsigned long val); 907 #if IS_ENABLED(CONFIG_IPV6) 908 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 909 unsigned long val); 910 #endif 911 struct net_bridge_mdb_entry * 912 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 913 struct net_bridge_mdb_entry * 914 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 915 struct net_bridge_port_group * 916 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 917 struct net_bridge_port_group __rcu *next, 918 unsigned char flags, const unsigned char *src, 919 u8 filter_mode, u8 rt_protocol); 920 int br_mdb_hash_init(struct net_bridge *br); 921 void br_mdb_hash_fini(struct net_bridge *br); 922 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 923 struct net_bridge_port_group *pg, int type); 924 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 925 int type); 926 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 927 struct net_bridge_port_group *pg, 928 struct net_bridge_port_group __rcu **pp); 929 void br_multicast_count(struct net_bridge *br, 930 const struct net_bridge_port *p, 931 const struct sk_buff *skb, u8 type, u8 dir); 932 int br_multicast_init_stats(struct net_bridge *br); 933 void br_multicast_uninit_stats(struct net_bridge *br); 934 void br_multicast_get_stats(const struct net_bridge *br, 935 const struct net_bridge_port *p, 936 struct br_mcast_stats *dest); 937 void br_mdb_init(void); 938 void br_mdb_uninit(void); 939 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 940 struct net_bridge_mdb_entry *mp, bool notify); 941 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 942 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 943 u8 filter_mode); 944 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 945 struct net_bridge_port_group *sg); 946 struct net_bridge_group_src * 947 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 948 void br_multicast_del_group_src(struct net_bridge_group_src *src, 949 bool fastleave); 950 void br_multicast_ctx_init(struct net_bridge *br, 951 struct net_bridge_vlan *vlan, 952 struct net_bridge_mcast *brmctx); 953 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 954 void br_multicast_port_ctx_init(struct net_bridge_port *port, 955 struct net_bridge_vlan *vlan, 956 struct net_bridge_mcast_port *pmctx); 957 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 958 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 959 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 960 struct netlink_ext_ack *extack); 961 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 962 963 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 964 const void *ctx, bool adding, struct notifier_block *nb, 965 struct netlink_ext_ack *extack); 966 int br_rports_fill_info(struct sk_buff *skb, 967 const struct net_bridge_mcast *brmctx); 968 int br_multicast_dump_querier_state(struct sk_buff *skb, 969 const struct net_bridge_mcast *brmctx, 970 int nest_attr); 971 size_t br_multicast_querier_state_size(void); 972 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 973 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 974 unsigned long val); 975 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 976 unsigned long val); 977 978 static inline bool br_group_is_l2(const struct br_ip *group) 979 { 980 return group->proto == 0; 981 } 982 983 #define mlock_dereference(X, br) \ 984 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 985 986 static inline struct hlist_node * 987 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 988 struct sk_buff *skb) 989 { 990 #if IS_ENABLED(CONFIG_IPV6) 991 if (skb->protocol == htons(ETH_P_IPV6)) 992 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 993 #endif 994 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 995 } 996 997 static inline struct net_bridge_port * 998 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 999 { 1000 struct net_bridge_mcast_port *mctx; 1001 1002 #if IS_ENABLED(CONFIG_IPV6) 1003 if (skb->protocol == htons(ETH_P_IPV6)) 1004 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1005 ip6_rlist); 1006 else 1007 #endif 1008 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1009 ip4_rlist); 1010 1011 if (mctx) 1012 return mctx->port; 1013 else 1014 return NULL; 1015 } 1016 1017 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1018 { 1019 return timer_pending(&brmctx->ip4_mc_router_timer); 1020 } 1021 1022 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1023 { 1024 #if IS_ENABLED(CONFIG_IPV6) 1025 return timer_pending(&brmctx->ip6_mc_router_timer); 1026 #else 1027 return false; 1028 #endif 1029 } 1030 1031 static inline bool 1032 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1033 { 1034 switch (brmctx->multicast_router) { 1035 case MDB_RTR_TYPE_PERM: 1036 return true; 1037 case MDB_RTR_TYPE_TEMP_QUERY: 1038 if (skb) { 1039 if (skb->protocol == htons(ETH_P_IP)) 1040 return br_ip4_multicast_is_router(brmctx); 1041 else if (skb->protocol == htons(ETH_P_IPV6)) 1042 return br_ip6_multicast_is_router(brmctx); 1043 } else { 1044 return br_ip4_multicast_is_router(brmctx) || 1045 br_ip6_multicast_is_router(brmctx); 1046 } 1047 fallthrough; 1048 default: 1049 return false; 1050 } 1051 } 1052 1053 static inline bool 1054 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1055 struct bridge_mcast_other_query *querier, 1056 const bool is_ipv6) 1057 { 1058 bool own_querier_enabled; 1059 1060 if (brmctx->multicast_querier) { 1061 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1062 own_querier_enabled = false; 1063 else 1064 own_querier_enabled = true; 1065 } else { 1066 own_querier_enabled = false; 1067 } 1068 1069 return time_is_before_jiffies(querier->delay_time) && 1070 (own_querier_enabled || timer_pending(&querier->timer)); 1071 } 1072 1073 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1074 struct ethhdr *eth, 1075 const struct net_bridge_mdb_entry *mdb) 1076 { 1077 switch (eth->h_proto) { 1078 case (htons(ETH_P_IP)): 1079 return __br_multicast_querier_exists(brmctx, 1080 &brmctx->ip4_other_query, false); 1081 #if IS_ENABLED(CONFIG_IPV6) 1082 case (htons(ETH_P_IPV6)): 1083 return __br_multicast_querier_exists(brmctx, 1084 &brmctx->ip6_other_query, true); 1085 #endif 1086 default: 1087 return !!mdb && br_group_is_l2(&mdb->addr); 1088 } 1089 } 1090 1091 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1092 { 1093 switch (ip->proto) { 1094 case htons(ETH_P_IP): 1095 return ipv4_is_zeronet(ip->src.ip4); 1096 #if IS_ENABLED(CONFIG_IPV6) 1097 case htons(ETH_P_IPV6): 1098 return ipv6_addr_any(&ip->src.ip6); 1099 #endif 1100 default: 1101 return false; 1102 } 1103 } 1104 1105 static inline bool 1106 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1107 __be16 proto) 1108 { 1109 switch (proto) { 1110 case htons(ETH_P_IP): 1111 return !!(brmctx->multicast_igmp_version == 3); 1112 #if IS_ENABLED(CONFIG_IPV6) 1113 case htons(ETH_P_IPV6): 1114 return !!(brmctx->multicast_mld_version == 2); 1115 #endif 1116 default: 1117 return false; 1118 } 1119 } 1120 1121 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1122 { 1123 return BR_INPUT_SKB_CB(skb)->igmp; 1124 } 1125 1126 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1127 { 1128 return brmctx->multicast_last_member_interval * 1129 brmctx->multicast_last_member_count; 1130 } 1131 1132 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1133 { 1134 return brmctx->multicast_membership_interval; 1135 } 1136 1137 static inline bool 1138 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1139 { 1140 return !!brmctx->vlan; 1141 } 1142 1143 static inline bool 1144 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1145 { 1146 return !!pmctx->vlan; 1147 } 1148 1149 static inline struct net_bridge_mcast * 1150 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1151 { 1152 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1153 return &pmctx->port->br->multicast_ctx; 1154 else 1155 return &pmctx->vlan->brvlan->br_mcast_ctx; 1156 } 1157 1158 static inline bool 1159 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1160 { 1161 return br_multicast_ctx_is_vlan(brmctx) && 1162 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1163 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1164 } 1165 1166 static inline bool 1167 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1168 { 1169 return br_multicast_ctx_is_vlan(brmctx) && 1170 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1171 } 1172 1173 static inline bool 1174 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1175 { 1176 return br_multicast_port_ctx_is_vlan(pmctx) && 1177 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1178 } 1179 1180 static inline bool 1181 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1182 { 1183 return pmctx->port->state == BR_STATE_DISABLED || 1184 (br_multicast_port_ctx_is_vlan(pmctx) && 1185 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1186 pmctx->vlan->state == BR_STATE_DISABLED)); 1187 } 1188 1189 static inline bool 1190 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1191 { 1192 return br_multicast_port_ctx_state_disabled(pmctx) || 1193 pmctx->port->state == BR_STATE_BLOCKING || 1194 (br_multicast_port_ctx_is_vlan(pmctx) && 1195 pmctx->vlan->state == BR_STATE_BLOCKING); 1196 } 1197 1198 static inline bool 1199 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1200 { 1201 #if IS_ENABLED(CONFIG_IPV6) 1202 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1203 !hlist_empty(&brmctx->ip6_mc_router_list); 1204 #else 1205 return !hlist_empty(&brmctx->ip4_mc_router_list); 1206 #endif 1207 } 1208 1209 static inline bool 1210 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1211 const struct net_bridge_mcast *brmctx2) 1212 { 1213 return brmctx1->multicast_igmp_version == 1214 brmctx2->multicast_igmp_version && 1215 brmctx1->multicast_last_member_count == 1216 brmctx2->multicast_last_member_count && 1217 brmctx1->multicast_startup_query_count == 1218 brmctx2->multicast_startup_query_count && 1219 brmctx1->multicast_last_member_interval == 1220 brmctx2->multicast_last_member_interval && 1221 brmctx1->multicast_membership_interval == 1222 brmctx2->multicast_membership_interval && 1223 brmctx1->multicast_querier_interval == 1224 brmctx2->multicast_querier_interval && 1225 brmctx1->multicast_query_interval == 1226 brmctx2->multicast_query_interval && 1227 brmctx1->multicast_query_response_interval == 1228 brmctx2->multicast_query_response_interval && 1229 brmctx1->multicast_startup_query_interval == 1230 brmctx2->multicast_startup_query_interval && 1231 brmctx1->multicast_querier == brmctx2->multicast_querier && 1232 brmctx1->multicast_router == brmctx2->multicast_router && 1233 !br_rports_have_mc_router(brmctx1) && 1234 !br_rports_have_mc_router(brmctx2) && 1235 #if IS_ENABLED(CONFIG_IPV6) 1236 brmctx1->multicast_mld_version == 1237 brmctx2->multicast_mld_version && 1238 #endif 1239 true; 1240 } 1241 1242 static inline bool 1243 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1244 { 1245 bool vlan_snooping_enabled; 1246 1247 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1248 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1249 1250 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1251 } 1252 #else 1253 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1254 struct net_bridge_mcast_port **pmctx, 1255 struct net_bridge_vlan *vlan, 1256 struct sk_buff *skb, 1257 u16 vid) 1258 { 1259 return 0; 1260 } 1261 1262 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1263 struct sk_buff *skb, u16 vid) 1264 { 1265 return NULL; 1266 } 1267 1268 static inline int br_multicast_add_port(struct net_bridge_port *port) 1269 { 1270 return 0; 1271 } 1272 1273 static inline void br_multicast_del_port(struct net_bridge_port *port) 1274 { 1275 } 1276 1277 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1278 { 1279 } 1280 1281 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1282 { 1283 } 1284 1285 static inline void br_multicast_init(struct net_bridge *br) 1286 { 1287 } 1288 1289 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1290 { 1291 } 1292 1293 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1294 { 1295 } 1296 1297 static inline void br_multicast_open(struct net_bridge *br) 1298 { 1299 } 1300 1301 static inline void br_multicast_stop(struct net_bridge *br) 1302 { 1303 } 1304 1305 static inline void br_multicast_dev_del(struct net_bridge *br) 1306 { 1307 } 1308 1309 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1310 struct sk_buff *skb, 1311 struct net_bridge_mcast *brmctx, 1312 bool local_rcv, bool local_orig) 1313 { 1314 } 1315 1316 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1317 struct sk_buff *skb) 1318 { 1319 return false; 1320 } 1321 1322 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1323 struct ethhdr *eth, 1324 const struct net_bridge_mdb_entry *mdb) 1325 { 1326 return false; 1327 } 1328 1329 static inline void br_mdb_init(void) 1330 { 1331 } 1332 1333 static inline void br_mdb_uninit(void) 1334 { 1335 } 1336 1337 static inline int br_mdb_hash_init(struct net_bridge *br) 1338 { 1339 return 0; 1340 } 1341 1342 static inline void br_mdb_hash_fini(struct net_bridge *br) 1343 { 1344 } 1345 1346 static inline void br_multicast_count(struct net_bridge *br, 1347 const struct net_bridge_port *p, 1348 const struct sk_buff *skb, 1349 u8 type, u8 dir) 1350 { 1351 } 1352 1353 static inline int br_multicast_init_stats(struct net_bridge *br) 1354 { 1355 return 0; 1356 } 1357 1358 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1359 { 1360 } 1361 1362 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1363 { 1364 return 0; 1365 } 1366 1367 static inline void br_multicast_ctx_init(struct net_bridge *br, 1368 struct net_bridge_vlan *vlan, 1369 struct net_bridge_mcast *brmctx) 1370 { 1371 } 1372 1373 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1374 { 1375 } 1376 1377 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1378 struct net_bridge_vlan *vlan, 1379 struct net_bridge_mcast_port *pmctx) 1380 { 1381 } 1382 1383 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1384 { 1385 } 1386 1387 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1388 bool on) 1389 { 1390 } 1391 1392 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1393 bool on, 1394 struct netlink_ext_ack *extack) 1395 { 1396 return -EOPNOTSUPP; 1397 } 1398 1399 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1400 bool on) 1401 { 1402 return false; 1403 } 1404 1405 static inline int br_mdb_replay(struct net_device *br_dev, 1406 struct net_device *dev, const void *ctx, 1407 bool adding, struct notifier_block *nb, 1408 struct netlink_ext_ack *extack) 1409 { 1410 return -EOPNOTSUPP; 1411 } 1412 1413 static inline bool 1414 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1415 const struct net_bridge_mcast *brmctx2) 1416 { 1417 return true; 1418 } 1419 #endif 1420 1421 /* br_vlan.c */ 1422 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1423 bool br_allowed_ingress(const struct net_bridge *br, 1424 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1425 u16 *vid, u8 *state, 1426 struct net_bridge_vlan **vlan); 1427 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1428 const struct sk_buff *skb); 1429 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1430 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1431 const struct net_bridge_port *port, 1432 struct net_bridge_vlan_group *vg, 1433 struct sk_buff *skb); 1434 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1435 bool *changed, struct netlink_ext_ack *extack); 1436 int br_vlan_delete(struct net_bridge *br, u16 vid); 1437 void br_vlan_flush(struct net_bridge *br); 1438 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1439 void br_recalculate_fwd_mask(struct net_bridge *br); 1440 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1441 struct netlink_ext_ack *extack); 1442 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1443 struct netlink_ext_ack *extack); 1444 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1445 struct netlink_ext_ack *extack); 1446 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1447 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1448 int br_vlan_init(struct net_bridge *br); 1449 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1450 struct netlink_ext_ack *extack); 1451 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1452 struct netlink_ext_ack *extack); 1453 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1454 bool *changed, struct netlink_ext_ack *extack); 1455 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1456 void nbp_vlan_flush(struct net_bridge_port *port); 1457 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1458 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1459 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1460 struct pcpu_sw_netstats *stats); 1461 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1462 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1463 void *ptr); 1464 void br_vlan_rtnl_init(void); 1465 void br_vlan_rtnl_uninit(void); 1466 void br_vlan_notify(const struct net_bridge *br, 1467 const struct net_bridge_port *p, 1468 u16 vid, u16 vid_range, 1469 int cmd); 1470 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1471 const void *ctx, bool adding, struct notifier_block *nb, 1472 struct netlink_ext_ack *extack); 1473 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1474 const struct net_bridge_vlan *range_end); 1475 1476 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1477 struct net_device_path_ctx *ctx, 1478 struct net_device_path *path); 1479 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1480 struct net_bridge_port *dst, 1481 struct net_device_path *path); 1482 1483 static inline struct net_bridge_vlan_group *br_vlan_group( 1484 const struct net_bridge *br) 1485 { 1486 return rtnl_dereference(br->vlgrp); 1487 } 1488 1489 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1490 const struct net_bridge_port *p) 1491 { 1492 return rtnl_dereference(p->vlgrp); 1493 } 1494 1495 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1496 const struct net_bridge *br) 1497 { 1498 return rcu_dereference(br->vlgrp); 1499 } 1500 1501 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1502 const struct net_bridge_port *p) 1503 { 1504 return rcu_dereference(p->vlgrp); 1505 } 1506 1507 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1508 * skb, the vlan tag will always be present if the frame was tagged. 1509 */ 1510 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1511 { 1512 int err = 0; 1513 1514 if (skb_vlan_tag_present(skb)) { 1515 *vid = skb_vlan_tag_get_id(skb); 1516 } else { 1517 *vid = 0; 1518 err = -EINVAL; 1519 } 1520 1521 return err; 1522 } 1523 1524 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1525 { 1526 if (!vg) 1527 return 0; 1528 1529 smp_rmb(); 1530 return vg->pvid; 1531 } 1532 1533 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1534 { 1535 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1536 } 1537 #else 1538 static inline bool br_allowed_ingress(const struct net_bridge *br, 1539 struct net_bridge_vlan_group *vg, 1540 struct sk_buff *skb, 1541 u16 *vid, u8 *state, 1542 struct net_bridge_vlan **vlan) 1543 1544 { 1545 *vlan = NULL; 1546 return true; 1547 } 1548 1549 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1550 const struct sk_buff *skb) 1551 { 1552 return true; 1553 } 1554 1555 static inline bool br_should_learn(struct net_bridge_port *p, 1556 struct sk_buff *skb, u16 *vid) 1557 { 1558 return true; 1559 } 1560 1561 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1562 const struct net_bridge_port *port, 1563 struct net_bridge_vlan_group *vg, 1564 struct sk_buff *skb) 1565 { 1566 return skb; 1567 } 1568 1569 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1570 bool *changed, struct netlink_ext_ack *extack) 1571 { 1572 *changed = false; 1573 return -EOPNOTSUPP; 1574 } 1575 1576 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1577 { 1578 return -EOPNOTSUPP; 1579 } 1580 1581 static inline void br_vlan_flush(struct net_bridge *br) 1582 { 1583 } 1584 1585 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1586 { 1587 } 1588 1589 static inline int br_vlan_init(struct net_bridge *br) 1590 { 1591 return 0; 1592 } 1593 1594 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1595 bool *changed, struct netlink_ext_ack *extack) 1596 { 1597 *changed = false; 1598 return -EOPNOTSUPP; 1599 } 1600 1601 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1602 { 1603 return -EOPNOTSUPP; 1604 } 1605 1606 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1607 { 1608 } 1609 1610 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1611 u16 vid) 1612 { 1613 return NULL; 1614 } 1615 1616 static inline int nbp_vlan_init(struct net_bridge_port *port, 1617 struct netlink_ext_ack *extack) 1618 { 1619 return 0; 1620 } 1621 1622 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1623 { 1624 return 0; 1625 } 1626 1627 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1628 { 1629 return 0; 1630 } 1631 1632 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1633 unsigned long val, 1634 struct netlink_ext_ack *extack) 1635 { 1636 return -EOPNOTSUPP; 1637 } 1638 1639 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1640 u32 filter_mask) 1641 { 1642 return 0; 1643 } 1644 1645 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1646 struct net_device_path_ctx *ctx, 1647 struct net_device_path *path) 1648 { 1649 } 1650 1651 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1652 struct net_bridge_port *dst, 1653 struct net_device_path *path) 1654 { 1655 return 0; 1656 } 1657 1658 static inline struct net_bridge_vlan_group *br_vlan_group( 1659 const struct net_bridge *br) 1660 { 1661 return NULL; 1662 } 1663 1664 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1665 const struct net_bridge_port *p) 1666 { 1667 return NULL; 1668 } 1669 1670 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1671 const struct net_bridge *br) 1672 { 1673 return NULL; 1674 } 1675 1676 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1677 const struct net_bridge_port *p) 1678 { 1679 return NULL; 1680 } 1681 1682 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1683 struct pcpu_sw_netstats *stats) 1684 { 1685 } 1686 1687 static inline void br_vlan_port_event(struct net_bridge_port *p, 1688 unsigned long event) 1689 { 1690 } 1691 1692 static inline int br_vlan_bridge_event(struct net_device *dev, 1693 unsigned long event, void *ptr) 1694 { 1695 return 0; 1696 } 1697 1698 static inline void br_vlan_rtnl_init(void) 1699 { 1700 } 1701 1702 static inline void br_vlan_rtnl_uninit(void) 1703 { 1704 } 1705 1706 static inline void br_vlan_notify(const struct net_bridge *br, 1707 const struct net_bridge_port *p, 1708 u16 vid, u16 vid_range, 1709 int cmd) 1710 { 1711 } 1712 1713 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1714 const struct net_bridge_vlan *range_end) 1715 { 1716 return true; 1717 } 1718 1719 static inline int br_vlan_replay(struct net_device *br_dev, 1720 struct net_device *dev, const void *ctx, 1721 bool adding, struct notifier_block *nb, 1722 struct netlink_ext_ack *extack) 1723 { 1724 return -EOPNOTSUPP; 1725 } 1726 #endif 1727 1728 /* br_vlan_options.c */ 1729 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1730 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1731 const struct net_bridge_vlan *range_end); 1732 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1733 size_t br_vlan_opts_nl_size(void); 1734 int br_vlan_process_options(const struct net_bridge *br, 1735 const struct net_bridge_port *p, 1736 struct net_bridge_vlan *range_start, 1737 struct net_bridge_vlan *range_end, 1738 struct nlattr **tb, 1739 struct netlink_ext_ack *extack); 1740 int br_vlan_rtm_process_global_options(struct net_device *dev, 1741 const struct nlattr *attr, 1742 int cmd, 1743 struct netlink_ext_ack *extack); 1744 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1745 const struct net_bridge_vlan *r_end); 1746 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1747 const struct net_bridge_vlan *v_opts); 1748 1749 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1750 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1751 { 1752 return READ_ONCE(v->state); 1753 } 1754 1755 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1756 { 1757 WRITE_ONCE(v->state, state); 1758 } 1759 1760 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1761 { 1762 return READ_ONCE(vg->pvid_state); 1763 } 1764 1765 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1766 u8 state) 1767 { 1768 WRITE_ONCE(vg->pvid_state, state); 1769 } 1770 1771 /* learn_allow is true at ingress and false at egress */ 1772 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1773 { 1774 switch (state) { 1775 case BR_STATE_LEARNING: 1776 return learn_allow; 1777 case BR_STATE_FORWARDING: 1778 return true; 1779 default: 1780 return false; 1781 } 1782 } 1783 #endif 1784 1785 struct nf_br_ops { 1786 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1787 }; 1788 extern const struct nf_br_ops __rcu *nf_br_ops; 1789 1790 /* br_netfilter.c */ 1791 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1792 int br_nf_core_init(void); 1793 void br_nf_core_fini(void); 1794 void br_netfilter_rtable_init(struct net_bridge *); 1795 #else 1796 static inline int br_nf_core_init(void) { return 0; } 1797 static inline void br_nf_core_fini(void) {} 1798 #define br_netfilter_rtable_init(x) 1799 #endif 1800 1801 /* br_stp.c */ 1802 void br_set_state(struct net_bridge_port *p, unsigned int state); 1803 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1804 void br_init_port(struct net_bridge_port *p); 1805 void br_become_designated_port(struct net_bridge_port *p); 1806 1807 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1808 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1809 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1810 int br_set_max_age(struct net_bridge *br, unsigned long x); 1811 int __set_ageing_time(struct net_device *dev, unsigned long t); 1812 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1813 1814 1815 /* br_stp_if.c */ 1816 void br_stp_enable_bridge(struct net_bridge *br); 1817 void br_stp_disable_bridge(struct net_bridge *br); 1818 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1819 struct netlink_ext_ack *extack); 1820 void br_stp_enable_port(struct net_bridge_port *p); 1821 void br_stp_disable_port(struct net_bridge_port *p); 1822 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1823 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1824 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1825 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1826 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1827 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1828 1829 /* br_stp_bpdu.c */ 1830 struct stp_proto; 1831 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1832 struct net_device *dev); 1833 1834 /* br_stp_timer.c */ 1835 void br_stp_timer_init(struct net_bridge *br); 1836 void br_stp_port_timer_init(struct net_bridge_port *p); 1837 unsigned long br_timer_value(const struct timer_list *timer); 1838 1839 /* br.c */ 1840 #if IS_ENABLED(CONFIG_ATM_LANE) 1841 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1842 #endif 1843 1844 /* br_mrp.c */ 1845 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1846 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1847 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1848 bool br_mrp_enabled(struct net_bridge *br); 1849 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1850 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1851 #else 1852 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1853 struct nlattr *attr, int cmd, 1854 struct netlink_ext_ack *extack) 1855 { 1856 return -EOPNOTSUPP; 1857 } 1858 1859 static inline bool br_mrp_enabled(struct net_bridge *br) 1860 { 1861 return false; 1862 } 1863 1864 static inline void br_mrp_port_del(struct net_bridge *br, 1865 struct net_bridge_port *p) 1866 { 1867 } 1868 1869 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1870 { 1871 return 0; 1872 } 1873 1874 #endif 1875 1876 /* br_cfm.c */ 1877 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1878 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1879 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1880 bool br_cfm_created(struct net_bridge *br); 1881 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1882 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1883 int br_cfm_status_fill_info(struct sk_buff *skb, 1884 struct net_bridge *br, 1885 bool getlink); 1886 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1887 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1888 #else 1889 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1890 struct nlattr *attr, int cmd, 1891 struct netlink_ext_ack *extack) 1892 { 1893 return -EOPNOTSUPP; 1894 } 1895 1896 static inline bool br_cfm_created(struct net_bridge *br) 1897 { 1898 return false; 1899 } 1900 1901 static inline void br_cfm_port_del(struct net_bridge *br, 1902 struct net_bridge_port *p) 1903 { 1904 } 1905 1906 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1907 { 1908 return -EOPNOTSUPP; 1909 } 1910 1911 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1912 struct net_bridge *br, 1913 bool getlink) 1914 { 1915 return -EOPNOTSUPP; 1916 } 1917 1918 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1919 { 1920 *count = 0; 1921 return -EOPNOTSUPP; 1922 } 1923 1924 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1925 { 1926 *count = 0; 1927 return -EOPNOTSUPP; 1928 } 1929 #endif 1930 1931 /* br_netlink.c */ 1932 extern struct rtnl_link_ops br_link_ops; 1933 int br_netlink_init(void); 1934 void br_netlink_fini(void); 1935 void br_ifinfo_notify(int event, const struct net_bridge *br, 1936 const struct net_bridge_port *port); 1937 void br_info_notify(int event, const struct net_bridge *br, 1938 const struct net_bridge_port *port, u32 filter); 1939 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1940 struct netlink_ext_ack *extack); 1941 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1942 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1943 u32 filter_mask, int nlflags); 1944 int br_process_vlan_info(struct net_bridge *br, 1945 struct net_bridge_port *p, int cmd, 1946 struct bridge_vlan_info *vinfo_curr, 1947 struct bridge_vlan_info **vinfo_last, 1948 bool *changed, 1949 struct netlink_ext_ack *extack); 1950 1951 #ifdef CONFIG_SYSFS 1952 /* br_sysfs_if.c */ 1953 extern const struct sysfs_ops brport_sysfs_ops; 1954 int br_sysfs_addif(struct net_bridge_port *p); 1955 int br_sysfs_renameif(struct net_bridge_port *p); 1956 1957 /* br_sysfs_br.c */ 1958 int br_sysfs_addbr(struct net_device *dev); 1959 void br_sysfs_delbr(struct net_device *dev); 1960 1961 #else 1962 1963 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1964 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1965 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1966 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1967 #endif /* CONFIG_SYSFS */ 1968 1969 /* br_switchdev.c */ 1970 #ifdef CONFIG_NET_SWITCHDEV 1971 int br_switchdev_port_offload(struct net_bridge_port *p, 1972 struct net_device *dev, const void *ctx, 1973 struct notifier_block *atomic_nb, 1974 struct notifier_block *blocking_nb, 1975 bool tx_fwd_offload, 1976 struct netlink_ext_ack *extack); 1977 1978 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1979 struct notifier_block *atomic_nb, 1980 struct notifier_block *blocking_nb); 1981 1982 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1983 1984 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1985 1986 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1987 struct sk_buff *skb); 1988 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1989 struct sk_buff *skb); 1990 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1991 struct sk_buff *skb); 1992 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1993 const struct sk_buff *skb); 1994 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1995 unsigned long flags, 1996 unsigned long mask, 1997 struct netlink_ext_ack *extack); 1998 void br_switchdev_fdb_notify(struct net_bridge *br, 1999 const struct net_bridge_fdb_entry *fdb, int type); 2000 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2001 struct netlink_ext_ack *extack); 2002 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2003 void br_switchdev_init(struct net_bridge *br); 2004 2005 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2006 { 2007 skb->offload_fwd_mark = 0; 2008 } 2009 #else 2010 static inline int 2011 br_switchdev_port_offload(struct net_bridge_port *p, 2012 struct net_device *dev, const void *ctx, 2013 struct notifier_block *atomic_nb, 2014 struct notifier_block *blocking_nb, 2015 bool tx_fwd_offload, 2016 struct netlink_ext_ack *extack) 2017 { 2018 return -EOPNOTSUPP; 2019 } 2020 2021 static inline void 2022 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2023 struct notifier_block *atomic_nb, 2024 struct notifier_block *blocking_nb) 2025 { 2026 } 2027 2028 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2029 { 2030 return false; 2031 } 2032 2033 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2034 { 2035 } 2036 2037 static inline void 2038 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2039 struct sk_buff *skb) 2040 { 2041 } 2042 2043 static inline void 2044 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2045 struct sk_buff *skb) 2046 { 2047 } 2048 2049 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2050 struct sk_buff *skb) 2051 { 2052 } 2053 2054 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2055 const struct sk_buff *skb) 2056 { 2057 return true; 2058 } 2059 2060 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2061 unsigned long flags, 2062 unsigned long mask, 2063 struct netlink_ext_ack *extack) 2064 { 2065 return 0; 2066 } 2067 2068 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2069 u16 vid, u16 flags, 2070 struct netlink_ext_ack *extack) 2071 { 2072 return -EOPNOTSUPP; 2073 } 2074 2075 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2076 { 2077 return -EOPNOTSUPP; 2078 } 2079 2080 static inline void 2081 br_switchdev_fdb_notify(struct net_bridge *br, 2082 const struct net_bridge_fdb_entry *fdb, int type) 2083 { 2084 } 2085 2086 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2087 { 2088 } 2089 2090 static inline void br_switchdev_init(struct net_bridge *br) 2091 { 2092 } 2093 2094 #endif /* CONFIG_NET_SWITCHDEV */ 2095 2096 /* br_arp_nd_proxy.c */ 2097 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2098 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2099 u16 vid, struct net_bridge_port *p); 2100 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2101 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2102 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2103 #endif 2104