1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_HWDOM_MAX BITS_PER_LONG 33 34 #define BR_VERSION "2.3" 35 36 /* Control of forwarding link local multicast */ 37 #define BR_GROUPFWD_DEFAULT 0 38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 39 enum { 40 BR_GROUPFWD_STP = BIT(0), 41 BR_GROUPFWD_MACPAUSE = BIT(1), 42 BR_GROUPFWD_LACP = BIT(2), 43 }; 44 45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 46 BR_GROUPFWD_LACP) 47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 48 #define BR_GROUPFWD_8021AD 0xB801u 49 50 /* Path to usermode spanning tree program */ 51 #define BR_STP_PROG "/sbin/bridge-stp" 52 53 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 54 55 typedef struct bridge_id bridge_id; 56 typedef struct mac_addr mac_addr; 57 typedef __u16 port_id; 58 59 struct bridge_id { 60 unsigned char prio[2]; 61 unsigned char addr[ETH_ALEN]; 62 }; 63 64 struct mac_addr { 65 unsigned char addr[ETH_ALEN]; 66 }; 67 68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 69 /* our own querier */ 70 struct bridge_mcast_own_query { 71 struct timer_list timer; 72 u32 startup_sent; 73 }; 74 75 /* other querier */ 76 struct bridge_mcast_other_query { 77 struct timer_list timer; 78 unsigned long delay_time; 79 }; 80 81 /* selected querier */ 82 struct bridge_mcast_querier { 83 struct br_ip addr; 84 int port_ifidx; 85 seqcount_t seq; 86 }; 87 88 /* IGMP/MLD statistics */ 89 struct bridge_mcast_stats { 90 struct br_mcast_stats mstats; 91 struct u64_stats_sync syncp; 92 }; 93 #endif 94 95 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 96 struct net_bridge_mcast_port { 97 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 98 struct net_bridge_port *port; 99 struct net_bridge_vlan *vlan; 100 101 struct bridge_mcast_own_query ip4_own_query; 102 struct timer_list ip4_mc_router_timer; 103 struct hlist_node ip4_rlist; 104 #if IS_ENABLED(CONFIG_IPV6) 105 struct bridge_mcast_own_query ip6_own_query; 106 struct timer_list ip6_mc_router_timer; 107 struct hlist_node ip6_rlist; 108 #endif /* IS_ENABLED(CONFIG_IPV6) */ 109 unsigned char multicast_router; 110 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 111 }; 112 113 /* net_bridge_mcast must be always defined due to forwarding stubs */ 114 struct net_bridge_mcast { 115 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 116 struct net_bridge *br; 117 struct net_bridge_vlan *vlan; 118 119 u32 multicast_last_member_count; 120 u32 multicast_startup_query_count; 121 122 u8 multicast_querier; 123 u8 multicast_igmp_version; 124 u8 multicast_router; 125 #if IS_ENABLED(CONFIG_IPV6) 126 u8 multicast_mld_version; 127 #endif 128 unsigned long multicast_last_member_interval; 129 unsigned long multicast_membership_interval; 130 unsigned long multicast_querier_interval; 131 unsigned long multicast_query_interval; 132 unsigned long multicast_query_response_interval; 133 unsigned long multicast_startup_query_interval; 134 struct hlist_head ip4_mc_router_list; 135 struct timer_list ip4_mc_router_timer; 136 struct bridge_mcast_other_query ip4_other_query; 137 struct bridge_mcast_own_query ip4_own_query; 138 struct bridge_mcast_querier ip4_querier; 139 #if IS_ENABLED(CONFIG_IPV6) 140 struct hlist_head ip6_mc_router_list; 141 struct timer_list ip6_mc_router_timer; 142 struct bridge_mcast_other_query ip6_other_query; 143 struct bridge_mcast_own_query ip6_own_query; 144 struct bridge_mcast_querier ip6_querier; 145 #endif /* IS_ENABLED(CONFIG_IPV6) */ 146 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 147 }; 148 149 struct br_tunnel_info { 150 __be64 tunnel_id; 151 struct metadata_dst __rcu *tunnel_dst; 152 }; 153 154 /* private vlan flags */ 155 enum { 156 BR_VLFLAG_PER_PORT_STATS = BIT(0), 157 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 158 BR_VLFLAG_MCAST_ENABLED = BIT(2), 159 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 160 }; 161 162 /** 163 * struct net_bridge_vlan - per-vlan entry 164 * 165 * @vnode: rhashtable member 166 * @vid: VLAN id 167 * @flags: bridge vlan flags 168 * @priv_flags: private (in-kernel) bridge vlan flags 169 * @state: STP state (e.g. blocking, learning, forwarding) 170 * @stats: per-cpu VLAN statistics 171 * @br: if MASTER flag set, this points to a bridge struct 172 * @port: if MASTER flag unset, this points to a port struct 173 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 174 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 175 * for this VLAN entry 176 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 177 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 178 * context 179 * @vlist: sorted list of VLAN entries 180 * @rcu: used for entry destruction 181 * 182 * This structure is shared between the global per-VLAN entries contained in 183 * the bridge rhashtable and the local per-port per-VLAN entries contained in 184 * the port's rhashtable. The union entries should be interpreted depending on 185 * the entry flags that are set. 186 */ 187 struct net_bridge_vlan { 188 struct rhash_head vnode; 189 struct rhash_head tnode; 190 u16 vid; 191 u16 flags; 192 u16 priv_flags; 193 u8 state; 194 struct pcpu_sw_netstats __percpu *stats; 195 union { 196 struct net_bridge *br; 197 struct net_bridge_port *port; 198 }; 199 union { 200 refcount_t refcnt; 201 struct net_bridge_vlan *brvlan; 202 }; 203 204 struct br_tunnel_info tinfo; 205 206 union { 207 struct net_bridge_mcast br_mcast_ctx; 208 struct net_bridge_mcast_port port_mcast_ctx; 209 }; 210 211 struct list_head vlist; 212 213 struct rcu_head rcu; 214 }; 215 216 /** 217 * struct net_bridge_vlan_group 218 * 219 * @vlan_hash: VLAN entry rhashtable 220 * @vlan_list: sorted VLAN entry list 221 * @num_vlans: number of total VLAN entries 222 * @pvid: PVID VLAN id 223 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 224 * 225 * IMPORTANT: Be careful when checking if there're VLAN entries using list 226 * primitives because the bridge can have entries in its list which 227 * are just for global context but not for filtering, i.e. they have 228 * the master flag set but not the brentry flag. If you have to check 229 * if there're "real" entries in the bridge please test @num_vlans 230 */ 231 struct net_bridge_vlan_group { 232 struct rhashtable vlan_hash; 233 struct rhashtable tunnel_hash; 234 struct list_head vlan_list; 235 u16 num_vlans; 236 u16 pvid; 237 u8 pvid_state; 238 }; 239 240 /* bridge fdb flags */ 241 enum { 242 BR_FDB_LOCAL, 243 BR_FDB_STATIC, 244 BR_FDB_STICKY, 245 BR_FDB_ADDED_BY_USER, 246 BR_FDB_ADDED_BY_EXT_LEARN, 247 BR_FDB_OFFLOADED, 248 BR_FDB_NOTIFY, 249 BR_FDB_NOTIFY_INACTIVE 250 }; 251 252 struct net_bridge_fdb_key { 253 mac_addr addr; 254 u16 vlan_id; 255 }; 256 257 struct net_bridge_fdb_entry { 258 struct rhash_head rhnode; 259 struct net_bridge_port *dst; 260 261 struct net_bridge_fdb_key key; 262 struct hlist_node fdb_node; 263 unsigned long flags; 264 265 /* write-heavy members should not affect lookups */ 266 unsigned long updated ____cacheline_aligned_in_smp; 267 unsigned long used; 268 269 struct rcu_head rcu; 270 }; 271 272 #define MDB_PG_FLAGS_PERMANENT BIT(0) 273 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 274 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 275 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 276 #define MDB_PG_FLAGS_BLOCKED BIT(4) 277 278 #define PG_SRC_ENT_LIMIT 32 279 280 #define BR_SGRP_F_DELETE BIT(0) 281 #define BR_SGRP_F_SEND BIT(1) 282 #define BR_SGRP_F_INSTALLED BIT(2) 283 284 struct net_bridge_mcast_gc { 285 struct hlist_node gc_node; 286 void (*destroy)(struct net_bridge_mcast_gc *gc); 287 }; 288 289 struct net_bridge_group_src { 290 struct hlist_node node; 291 292 struct br_ip addr; 293 struct net_bridge_port_group *pg; 294 u8 flags; 295 u8 src_query_rexmit_cnt; 296 struct timer_list timer; 297 298 struct net_bridge *br; 299 struct net_bridge_mcast_gc mcast_gc; 300 struct rcu_head rcu; 301 }; 302 303 struct net_bridge_port_group_sg_key { 304 struct net_bridge_port *port; 305 struct br_ip addr; 306 }; 307 308 struct net_bridge_port_group { 309 struct net_bridge_port_group __rcu *next; 310 struct net_bridge_port_group_sg_key key; 311 unsigned char eth_addr[ETH_ALEN] __aligned(2); 312 unsigned char flags; 313 unsigned char filter_mode; 314 unsigned char grp_query_rexmit_cnt; 315 unsigned char rt_protocol; 316 317 struct hlist_head src_list; 318 unsigned int src_ents; 319 struct timer_list timer; 320 struct timer_list rexmit_timer; 321 struct hlist_node mglist; 322 struct rb_root eht_set_tree; 323 struct rb_root eht_host_tree; 324 325 struct rhash_head rhnode; 326 struct net_bridge_mcast_gc mcast_gc; 327 struct rcu_head rcu; 328 }; 329 330 struct net_bridge_mdb_entry { 331 struct rhash_head rhnode; 332 struct net_bridge *br; 333 struct net_bridge_port_group __rcu *ports; 334 struct br_ip addr; 335 bool host_joined; 336 337 struct timer_list timer; 338 struct hlist_node mdb_node; 339 340 struct net_bridge_mcast_gc mcast_gc; 341 struct rcu_head rcu; 342 }; 343 344 struct net_bridge_port { 345 struct net_bridge *br; 346 struct net_device *dev; 347 struct list_head list; 348 349 unsigned long flags; 350 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 351 struct net_bridge_vlan_group __rcu *vlgrp; 352 #endif 353 struct net_bridge_port __rcu *backup_port; 354 355 /* STP */ 356 u8 priority; 357 u8 state; 358 u16 port_no; 359 unsigned char topology_change_ack; 360 unsigned char config_pending; 361 port_id port_id; 362 port_id designated_port; 363 bridge_id designated_root; 364 bridge_id designated_bridge; 365 u32 path_cost; 366 u32 designated_cost; 367 unsigned long designated_age; 368 369 struct timer_list forward_delay_timer; 370 struct timer_list hold_timer; 371 struct timer_list message_age_timer; 372 struct kobject kobj; 373 struct rcu_head rcu; 374 375 struct net_bridge_mcast_port multicast_ctx; 376 377 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 378 struct bridge_mcast_stats __percpu *mcast_stats; 379 380 u32 multicast_eht_hosts_limit; 381 u32 multicast_eht_hosts_cnt; 382 struct hlist_head mglist; 383 #endif 384 385 #ifdef CONFIG_SYSFS 386 char sysfs_name[IFNAMSIZ]; 387 #endif 388 389 #ifdef CONFIG_NET_POLL_CONTROLLER 390 struct netpoll *np; 391 #endif 392 #ifdef CONFIG_NET_SWITCHDEV 393 /* Identifier used to group ports that share the same switchdev 394 * hardware domain. 395 */ 396 int hwdom; 397 int offload_count; 398 struct netdev_phys_item_id ppid; 399 #endif 400 u16 group_fwd_mask; 401 u16 backup_redirected_cnt; 402 403 struct bridge_stp_xstats stp_xstats; 404 }; 405 406 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 407 408 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 409 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 410 411 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 412 { 413 return rcu_dereference(dev->rx_handler_data); 414 } 415 416 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 417 { 418 return netif_is_bridge_port(dev) ? 419 rtnl_dereference(dev->rx_handler_data) : NULL; 420 } 421 422 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 423 { 424 return netif_is_bridge_port(dev) ? 425 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 426 } 427 428 enum net_bridge_opts { 429 BROPT_VLAN_ENABLED, 430 BROPT_VLAN_STATS_ENABLED, 431 BROPT_NF_CALL_IPTABLES, 432 BROPT_NF_CALL_IP6TABLES, 433 BROPT_NF_CALL_ARPTABLES, 434 BROPT_GROUP_ADDR_SET, 435 BROPT_MULTICAST_ENABLED, 436 BROPT_MULTICAST_QUERY_USE_IFADDR, 437 BROPT_MULTICAST_STATS_ENABLED, 438 BROPT_HAS_IPV6_ADDR, 439 BROPT_NEIGH_SUPPRESS_ENABLED, 440 BROPT_MTU_SET_BY_USER, 441 BROPT_VLAN_STATS_PER_PORT, 442 BROPT_NO_LL_LEARN, 443 BROPT_VLAN_BRIDGE_BINDING, 444 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 445 }; 446 447 struct net_bridge { 448 spinlock_t lock; 449 spinlock_t hash_lock; 450 struct hlist_head frame_type_list; 451 struct net_device *dev; 452 unsigned long options; 453 /* These fields are accessed on each packet */ 454 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 455 __be16 vlan_proto; 456 u16 default_pvid; 457 struct net_bridge_vlan_group __rcu *vlgrp; 458 #endif 459 460 struct rhashtable fdb_hash_tbl; 461 struct list_head port_list; 462 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 463 union { 464 struct rtable fake_rtable; 465 struct rt6_info fake_rt6_info; 466 }; 467 #endif 468 u16 group_fwd_mask; 469 u16 group_fwd_mask_required; 470 471 /* STP */ 472 bridge_id designated_root; 473 bridge_id bridge_id; 474 unsigned char topology_change; 475 unsigned char topology_change_detected; 476 u16 root_port; 477 unsigned long max_age; 478 unsigned long hello_time; 479 unsigned long forward_delay; 480 unsigned long ageing_time; 481 unsigned long bridge_max_age; 482 unsigned long bridge_hello_time; 483 unsigned long bridge_forward_delay; 484 unsigned long bridge_ageing_time; 485 u32 root_path_cost; 486 487 u8 group_addr[ETH_ALEN]; 488 489 enum { 490 BR_NO_STP, /* no spanning tree */ 491 BR_KERNEL_STP, /* old STP in kernel */ 492 BR_USER_STP, /* new RSTP in userspace */ 493 } stp_enabled; 494 495 struct net_bridge_mcast multicast_ctx; 496 497 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 498 struct bridge_mcast_stats __percpu *mcast_stats; 499 500 u32 hash_max; 501 502 spinlock_t multicast_lock; 503 504 struct rhashtable mdb_hash_tbl; 505 struct rhashtable sg_port_tbl; 506 507 struct hlist_head mcast_gc_list; 508 struct hlist_head mdb_list; 509 510 struct work_struct mcast_gc_work; 511 #endif 512 513 struct timer_list hello_timer; 514 struct timer_list tcn_timer; 515 struct timer_list topology_change_timer; 516 struct delayed_work gc_work; 517 struct kobject *ifobj; 518 u32 auto_cnt; 519 520 #ifdef CONFIG_NET_SWITCHDEV 521 /* Counter used to make sure that hardware domains get unique 522 * identifiers in case a bridge spans multiple switchdev instances. 523 */ 524 int last_hwdom; 525 /* Bit mask of hardware domain numbers in use */ 526 unsigned long busy_hwdoms; 527 #endif 528 struct hlist_head fdb_list; 529 530 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 531 struct hlist_head mrp_list; 532 #endif 533 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 534 struct hlist_head mep_list; 535 #endif 536 }; 537 538 struct br_input_skb_cb { 539 struct net_device *brdev; 540 541 u16 frag_max_size; 542 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 543 u8 igmp; 544 u8 mrouters_only:1; 545 #endif 546 u8 proxyarp_replied:1; 547 u8 src_port_isolated:1; 548 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 549 u8 vlan_filtered:1; 550 #endif 551 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 552 u8 br_netfilter_broute:1; 553 #endif 554 555 #ifdef CONFIG_NET_SWITCHDEV 556 /* Set if TX data plane offloading is used towards at least one 557 * hardware domain. 558 */ 559 u8 tx_fwd_offload:1; 560 /* The switchdev hardware domain from which this packet was received. 561 * If skb->offload_fwd_mark was set, then this packet was already 562 * forwarded by hardware to the other ports in the source hardware 563 * domain, otherwise it wasn't. 564 */ 565 int src_hwdom; 566 /* Bit mask of hardware domains towards this packet has already been 567 * transmitted using the TX data plane offload. 568 */ 569 unsigned long fwd_hwdoms; 570 #endif 571 }; 572 573 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 574 575 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 576 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 577 #else 578 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 579 #endif 580 581 #define br_printk(level, br, format, args...) \ 582 printk(level "%s: " format, (br)->dev->name, ##args) 583 584 #define br_err(__br, format, args...) \ 585 br_printk(KERN_ERR, __br, format, ##args) 586 #define br_warn(__br, format, args...) \ 587 br_printk(KERN_WARNING, __br, format, ##args) 588 #define br_notice(__br, format, args...) \ 589 br_printk(KERN_NOTICE, __br, format, ##args) 590 #define br_info(__br, format, args...) \ 591 br_printk(KERN_INFO, __br, format, ##args) 592 593 #define br_debug(br, format, args...) \ 594 pr_debug("%s: " format, (br)->dev->name, ##args) 595 596 /* called under bridge lock */ 597 static inline int br_is_root_bridge(const struct net_bridge *br) 598 { 599 return !memcmp(&br->bridge_id, &br->designated_root, 8); 600 } 601 602 /* check if a VLAN entry is global */ 603 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 604 { 605 return v->flags & BRIDGE_VLAN_INFO_MASTER; 606 } 607 608 /* check if a VLAN entry is used by the bridge */ 609 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 610 { 611 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 612 } 613 614 /* check if we should use the vlan entry, returns false if it's only context */ 615 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 616 { 617 if (br_vlan_is_master(v)) { 618 if (br_vlan_is_brentry(v)) 619 return true; 620 else 621 return false; 622 } 623 624 return true; 625 } 626 627 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 628 { 629 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 630 } 631 632 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 633 { 634 bool ret = vid > 0 && vid < VLAN_VID_MASK; 635 636 if (!ret) 637 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 638 639 return ret; 640 } 641 642 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 643 const struct bridge_vlan_info *last, 644 struct netlink_ext_ack *extack) 645 { 646 /* pvid flag is not allowed in ranges */ 647 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 648 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 649 return false; 650 } 651 652 /* when cur is the range end, check if: 653 * - it has range start flag 654 * - range ids are invalid (end is equal to or before start) 655 */ 656 if (last) { 657 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 658 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 659 return false; 660 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 661 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 662 return false; 663 } else if (cur->vid <= last->vid) { 664 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 665 return false; 666 } 667 } 668 669 /* check for required range flags */ 670 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 671 BRIDGE_VLAN_INFO_RANGE_END))) { 672 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 673 return false; 674 } 675 676 return true; 677 } 678 679 static inline int br_afspec_cmd_to_rtm(int cmd) 680 { 681 switch (cmd) { 682 case RTM_SETLINK: 683 return RTM_NEWVLAN; 684 case RTM_DELLINK: 685 return RTM_DELVLAN; 686 } 687 688 return 0; 689 } 690 691 static inline int br_opt_get(const struct net_bridge *br, 692 enum net_bridge_opts opt) 693 { 694 return test_bit(opt, &br->options); 695 } 696 697 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 698 struct netlink_ext_ack *extack); 699 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 700 int br_boolopt_multi_toggle(struct net_bridge *br, 701 struct br_boolopt_multi *bm, 702 struct netlink_ext_ack *extack); 703 void br_boolopt_multi_get(const struct net_bridge *br, 704 struct br_boolopt_multi *bm); 705 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 706 707 /* br_device.c */ 708 void br_dev_setup(struct net_device *dev); 709 void br_dev_delete(struct net_device *dev, struct list_head *list); 710 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 711 #ifdef CONFIG_NET_POLL_CONTROLLER 712 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 713 struct sk_buff *skb) 714 { 715 netpoll_send_skb(p->np, skb); 716 } 717 718 int br_netpoll_enable(struct net_bridge_port *p); 719 void br_netpoll_disable(struct net_bridge_port *p); 720 #else 721 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 722 struct sk_buff *skb) 723 { 724 } 725 726 static inline int br_netpoll_enable(struct net_bridge_port *p) 727 { 728 return 0; 729 } 730 731 static inline void br_netpoll_disable(struct net_bridge_port *p) 732 { 733 } 734 #endif 735 736 /* br_fdb.c */ 737 int br_fdb_init(void); 738 void br_fdb_fini(void); 739 int br_fdb_hash_init(struct net_bridge *br); 740 void br_fdb_hash_fini(struct net_bridge *br); 741 void br_fdb_flush(struct net_bridge *br); 742 void br_fdb_find_delete_local(struct net_bridge *br, 743 const struct net_bridge_port *p, 744 const unsigned char *addr, u16 vid); 745 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 746 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 747 void br_fdb_cleanup(struct work_struct *work); 748 void br_fdb_delete_by_port(struct net_bridge *br, 749 const struct net_bridge_port *p, u16 vid, int do_all); 750 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 751 const unsigned char *addr, 752 __u16 vid); 753 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 754 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 755 unsigned long off); 756 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 757 const unsigned char *addr, u16 vid); 758 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 759 const unsigned char *addr, u16 vid, unsigned long flags); 760 761 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 762 struct net_device *dev, const unsigned char *addr, u16 vid); 763 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 764 const unsigned char *addr, u16 vid, u16 nlh_flags, 765 struct netlink_ext_ack *extack); 766 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 767 struct net_device *dev, struct net_device *fdev, int *idx); 768 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 769 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 770 struct netlink_ext_ack *extack); 771 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 772 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 773 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 774 const unsigned char *addr, u16 vid, 775 bool swdev_notify); 776 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 777 const unsigned char *addr, u16 vid, 778 bool swdev_notify); 779 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 780 const unsigned char *addr, u16 vid, bool offloaded); 781 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding, 782 struct notifier_block *nb); 783 784 /* br_forward.c */ 785 enum br_pkt_type { 786 BR_PKT_UNICAST, 787 BR_PKT_MULTICAST, 788 BR_PKT_BROADCAST 789 }; 790 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 791 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 792 bool local_rcv, bool local_orig); 793 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 794 void br_flood(struct net_bridge *br, struct sk_buff *skb, 795 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 796 797 /* return true if both source port and dest port are isolated */ 798 static inline bool br_skb_isolated(const struct net_bridge_port *to, 799 const struct sk_buff *skb) 800 { 801 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 802 (to->flags & BR_ISOLATED); 803 } 804 805 /* br_if.c */ 806 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 807 int br_add_bridge(struct net *net, const char *name); 808 int br_del_bridge(struct net *net, const char *name); 809 int br_add_if(struct net_bridge *br, struct net_device *dev, 810 struct netlink_ext_ack *extack); 811 int br_del_if(struct net_bridge *br, struct net_device *dev); 812 void br_mtu_auto_adjust(struct net_bridge *br); 813 netdev_features_t br_features_recompute(struct net_bridge *br, 814 netdev_features_t features); 815 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 816 void br_manage_promisc(struct net_bridge *br); 817 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 818 819 /* br_input.c */ 820 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 821 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 822 823 struct br_frame_type { 824 __be16 type; 825 int (*frame_handler)(struct net_bridge_port *port, 826 struct sk_buff *skb); 827 struct hlist_node list; 828 }; 829 830 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 831 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 832 833 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 834 { 835 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 836 } 837 838 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 839 { 840 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 841 } 842 843 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 844 { 845 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 846 } 847 848 static inline struct net_bridge_port * 849 br_port_get_check_rtnl(const struct net_device *dev) 850 { 851 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 852 } 853 854 /* br_ioctl.c */ 855 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 856 void __user *data, int cmd); 857 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 858 struct ifreq *ifr, void __user *uarg); 859 860 /* br_multicast.c */ 861 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 862 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 863 struct net_bridge_mcast_port **pmctx, 864 struct net_bridge_vlan *vlan, 865 struct sk_buff *skb, u16 vid); 866 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 867 struct sk_buff *skb, u16 vid); 868 int br_multicast_add_port(struct net_bridge_port *port); 869 void br_multicast_del_port(struct net_bridge_port *port); 870 void br_multicast_enable_port(struct net_bridge_port *port); 871 void br_multicast_disable_port(struct net_bridge_port *port); 872 void br_multicast_init(struct net_bridge *br); 873 void br_multicast_join_snoopers(struct net_bridge *br); 874 void br_multicast_leave_snoopers(struct net_bridge *br); 875 void br_multicast_open(struct net_bridge *br); 876 void br_multicast_stop(struct net_bridge *br); 877 void br_multicast_dev_del(struct net_bridge *br); 878 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 879 struct net_bridge_mcast *brmctx, 880 bool local_rcv, bool local_orig); 881 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 882 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 883 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 884 struct netlink_ext_ack *extack); 885 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 886 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 887 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 888 unsigned long val); 889 #if IS_ENABLED(CONFIG_IPV6) 890 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 891 unsigned long val); 892 #endif 893 struct net_bridge_mdb_entry * 894 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 895 struct net_bridge_mdb_entry * 896 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 897 struct net_bridge_port_group * 898 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 899 struct net_bridge_port_group __rcu *next, 900 unsigned char flags, const unsigned char *src, 901 u8 filter_mode, u8 rt_protocol); 902 int br_mdb_hash_init(struct net_bridge *br); 903 void br_mdb_hash_fini(struct net_bridge *br); 904 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 905 struct net_bridge_port_group *pg, int type); 906 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 907 int type); 908 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 909 struct net_bridge_port_group *pg, 910 struct net_bridge_port_group __rcu **pp); 911 void br_multicast_count(struct net_bridge *br, 912 const struct net_bridge_port *p, 913 const struct sk_buff *skb, u8 type, u8 dir); 914 int br_multicast_init_stats(struct net_bridge *br); 915 void br_multicast_uninit_stats(struct net_bridge *br); 916 void br_multicast_get_stats(const struct net_bridge *br, 917 const struct net_bridge_port *p, 918 struct br_mcast_stats *dest); 919 void br_mdb_init(void); 920 void br_mdb_uninit(void); 921 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 922 struct net_bridge_mdb_entry *mp, bool notify); 923 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 924 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 925 u8 filter_mode); 926 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 927 struct net_bridge_port_group *sg); 928 struct net_bridge_group_src * 929 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 930 void br_multicast_del_group_src(struct net_bridge_group_src *src, 931 bool fastleave); 932 void br_multicast_ctx_init(struct net_bridge *br, 933 struct net_bridge_vlan *vlan, 934 struct net_bridge_mcast *brmctx); 935 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 936 void br_multicast_port_ctx_init(struct net_bridge_port *port, 937 struct net_bridge_vlan *vlan, 938 struct net_bridge_mcast_port *pmctx); 939 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 940 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 941 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 942 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 943 struct netlink_ext_ack *extack); 944 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 945 946 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 947 const void *ctx, bool adding, struct notifier_block *nb, 948 struct netlink_ext_ack *extack); 949 int br_rports_fill_info(struct sk_buff *skb, 950 const struct net_bridge_mcast *brmctx); 951 952 static inline bool br_group_is_l2(const struct br_ip *group) 953 { 954 return group->proto == 0; 955 } 956 957 #define mlock_dereference(X, br) \ 958 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 959 960 static inline struct hlist_node * 961 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 962 struct sk_buff *skb) 963 { 964 #if IS_ENABLED(CONFIG_IPV6) 965 if (skb->protocol == htons(ETH_P_IPV6)) 966 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 967 #endif 968 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 969 } 970 971 static inline struct net_bridge_port * 972 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 973 { 974 struct net_bridge_mcast_port *mctx; 975 976 #if IS_ENABLED(CONFIG_IPV6) 977 if (skb->protocol == htons(ETH_P_IPV6)) 978 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 979 ip6_rlist); 980 else 981 #endif 982 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 983 ip4_rlist); 984 985 if (mctx) 986 return mctx->port; 987 else 988 return NULL; 989 } 990 991 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 992 { 993 return timer_pending(&brmctx->ip4_mc_router_timer); 994 } 995 996 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 997 { 998 #if IS_ENABLED(CONFIG_IPV6) 999 return timer_pending(&brmctx->ip6_mc_router_timer); 1000 #else 1001 return false; 1002 #endif 1003 } 1004 1005 static inline bool 1006 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1007 { 1008 switch (brmctx->multicast_router) { 1009 case MDB_RTR_TYPE_PERM: 1010 return true; 1011 case MDB_RTR_TYPE_TEMP_QUERY: 1012 if (skb) { 1013 if (skb->protocol == htons(ETH_P_IP)) 1014 return br_ip4_multicast_is_router(brmctx); 1015 else if (skb->protocol == htons(ETH_P_IPV6)) 1016 return br_ip6_multicast_is_router(brmctx); 1017 } else { 1018 return br_ip4_multicast_is_router(brmctx) || 1019 br_ip6_multicast_is_router(brmctx); 1020 } 1021 fallthrough; 1022 default: 1023 return false; 1024 } 1025 } 1026 1027 static inline bool 1028 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1029 struct bridge_mcast_other_query *querier, 1030 const bool is_ipv6) 1031 { 1032 bool own_querier_enabled; 1033 1034 if (brmctx->multicast_querier) { 1035 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1036 own_querier_enabled = false; 1037 else 1038 own_querier_enabled = true; 1039 } else { 1040 own_querier_enabled = false; 1041 } 1042 1043 return time_is_before_jiffies(querier->delay_time) && 1044 (own_querier_enabled || timer_pending(&querier->timer)); 1045 } 1046 1047 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1048 struct ethhdr *eth, 1049 const struct net_bridge_mdb_entry *mdb) 1050 { 1051 switch (eth->h_proto) { 1052 case (htons(ETH_P_IP)): 1053 return __br_multicast_querier_exists(brmctx, 1054 &brmctx->ip4_other_query, false); 1055 #if IS_ENABLED(CONFIG_IPV6) 1056 case (htons(ETH_P_IPV6)): 1057 return __br_multicast_querier_exists(brmctx, 1058 &brmctx->ip6_other_query, true); 1059 #endif 1060 default: 1061 return !!mdb && br_group_is_l2(&mdb->addr); 1062 } 1063 } 1064 1065 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1066 { 1067 switch (ip->proto) { 1068 case htons(ETH_P_IP): 1069 return ipv4_is_zeronet(ip->src.ip4); 1070 #if IS_ENABLED(CONFIG_IPV6) 1071 case htons(ETH_P_IPV6): 1072 return ipv6_addr_any(&ip->src.ip6); 1073 #endif 1074 default: 1075 return false; 1076 } 1077 } 1078 1079 static inline bool 1080 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1081 __be16 proto) 1082 { 1083 switch (proto) { 1084 case htons(ETH_P_IP): 1085 return !!(brmctx->multicast_igmp_version == 3); 1086 #if IS_ENABLED(CONFIG_IPV6) 1087 case htons(ETH_P_IPV6): 1088 return !!(brmctx->multicast_mld_version == 2); 1089 #endif 1090 default: 1091 return false; 1092 } 1093 } 1094 1095 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1096 { 1097 return BR_INPUT_SKB_CB(skb)->igmp; 1098 } 1099 1100 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1101 { 1102 return brmctx->multicast_last_member_interval * 1103 brmctx->multicast_last_member_count; 1104 } 1105 1106 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1107 { 1108 /* use the RFC default of 2 for QRV */ 1109 return 2 * brmctx->multicast_query_interval + 1110 brmctx->multicast_query_response_interval; 1111 } 1112 1113 static inline bool 1114 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1115 { 1116 return !!brmctx->vlan; 1117 } 1118 1119 static inline bool 1120 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1121 { 1122 return !!pmctx->vlan; 1123 } 1124 1125 static inline struct net_bridge_mcast * 1126 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1127 { 1128 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1129 return &pmctx->port->br->multicast_ctx; 1130 else 1131 return &pmctx->vlan->brvlan->br_mcast_ctx; 1132 } 1133 1134 static inline bool 1135 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1136 { 1137 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1138 br_multicast_ctx_is_vlan(brmctx) && 1139 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1140 } 1141 1142 static inline bool 1143 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1144 { 1145 return br_multicast_ctx_is_vlan(brmctx) && 1146 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1147 } 1148 1149 static inline bool 1150 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1151 { 1152 return br_multicast_port_ctx_is_vlan(pmctx) && 1153 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1154 } 1155 1156 static inline bool 1157 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1158 { 1159 return pmctx->port->state == BR_STATE_DISABLED || 1160 (br_multicast_port_ctx_is_vlan(pmctx) && 1161 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1162 pmctx->vlan->state == BR_STATE_DISABLED)); 1163 } 1164 1165 static inline bool 1166 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1167 { 1168 return br_multicast_port_ctx_state_disabled(pmctx) || 1169 pmctx->port->state == BR_STATE_BLOCKING || 1170 (br_multicast_port_ctx_is_vlan(pmctx) && 1171 pmctx->vlan->state == BR_STATE_BLOCKING); 1172 } 1173 1174 static inline bool 1175 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1176 { 1177 #if IS_ENABLED(CONFIG_IPV6) 1178 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1179 !hlist_empty(&brmctx->ip6_mc_router_list); 1180 #else 1181 return !hlist_empty(&brmctx->ip4_mc_router_list); 1182 #endif 1183 } 1184 1185 static inline bool 1186 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1187 const struct net_bridge_mcast *brmctx2) 1188 { 1189 return brmctx1->multicast_igmp_version == 1190 brmctx2->multicast_igmp_version && 1191 brmctx1->multicast_last_member_count == 1192 brmctx2->multicast_last_member_count && 1193 brmctx1->multicast_startup_query_count == 1194 brmctx2->multicast_startup_query_count && 1195 brmctx1->multicast_last_member_interval == 1196 brmctx2->multicast_last_member_interval && 1197 brmctx1->multicast_membership_interval == 1198 brmctx2->multicast_membership_interval && 1199 brmctx1->multicast_querier_interval == 1200 brmctx2->multicast_querier_interval && 1201 brmctx1->multicast_query_interval == 1202 brmctx2->multicast_query_interval && 1203 brmctx1->multicast_query_response_interval == 1204 brmctx2->multicast_query_response_interval && 1205 brmctx1->multicast_startup_query_interval == 1206 brmctx2->multicast_startup_query_interval && 1207 brmctx1->multicast_querier == brmctx2->multicast_querier && 1208 brmctx1->multicast_router == brmctx2->multicast_router && 1209 !br_rports_have_mc_router(brmctx1) && 1210 !br_rports_have_mc_router(brmctx2) && 1211 #if IS_ENABLED(CONFIG_IPV6) 1212 brmctx1->multicast_mld_version == 1213 brmctx2->multicast_mld_version && 1214 #endif 1215 true; 1216 } 1217 1218 static inline bool 1219 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1220 { 1221 bool vlan_snooping_enabled; 1222 1223 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1224 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1225 1226 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1227 } 1228 #else 1229 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1230 struct net_bridge_mcast_port **pmctx, 1231 struct net_bridge_vlan *vlan, 1232 struct sk_buff *skb, 1233 u16 vid) 1234 { 1235 return 0; 1236 } 1237 1238 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1239 struct sk_buff *skb, u16 vid) 1240 { 1241 return NULL; 1242 } 1243 1244 static inline int br_multicast_add_port(struct net_bridge_port *port) 1245 { 1246 return 0; 1247 } 1248 1249 static inline void br_multicast_del_port(struct net_bridge_port *port) 1250 { 1251 } 1252 1253 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1254 { 1255 } 1256 1257 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1258 { 1259 } 1260 1261 static inline void br_multicast_init(struct net_bridge *br) 1262 { 1263 } 1264 1265 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1266 { 1267 } 1268 1269 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1270 { 1271 } 1272 1273 static inline void br_multicast_open(struct net_bridge *br) 1274 { 1275 } 1276 1277 static inline void br_multicast_stop(struct net_bridge *br) 1278 { 1279 } 1280 1281 static inline void br_multicast_dev_del(struct net_bridge *br) 1282 { 1283 } 1284 1285 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1286 struct sk_buff *skb, 1287 struct net_bridge_mcast *brmctx, 1288 bool local_rcv, bool local_orig) 1289 { 1290 } 1291 1292 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1293 struct sk_buff *skb) 1294 { 1295 return false; 1296 } 1297 1298 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1299 struct ethhdr *eth, 1300 const struct net_bridge_mdb_entry *mdb) 1301 { 1302 return false; 1303 } 1304 1305 static inline void br_mdb_init(void) 1306 { 1307 } 1308 1309 static inline void br_mdb_uninit(void) 1310 { 1311 } 1312 1313 static inline int br_mdb_hash_init(struct net_bridge *br) 1314 { 1315 return 0; 1316 } 1317 1318 static inline void br_mdb_hash_fini(struct net_bridge *br) 1319 { 1320 } 1321 1322 static inline void br_multicast_count(struct net_bridge *br, 1323 const struct net_bridge_port *p, 1324 const struct sk_buff *skb, 1325 u8 type, u8 dir) 1326 { 1327 } 1328 1329 static inline int br_multicast_init_stats(struct net_bridge *br) 1330 { 1331 return 0; 1332 } 1333 1334 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1335 { 1336 } 1337 1338 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1339 { 1340 return 0; 1341 } 1342 1343 static inline void br_multicast_ctx_init(struct net_bridge *br, 1344 struct net_bridge_vlan *vlan, 1345 struct net_bridge_mcast *brmctx) 1346 { 1347 } 1348 1349 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1350 { 1351 } 1352 1353 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1354 struct net_bridge_vlan *vlan, 1355 struct net_bridge_mcast_port *pmctx) 1356 { 1357 } 1358 1359 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1360 { 1361 } 1362 1363 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1364 bool on) 1365 { 1366 } 1367 1368 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1369 bool on) 1370 { 1371 } 1372 1373 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1374 bool on, 1375 struct netlink_ext_ack *extack) 1376 { 1377 return -EOPNOTSUPP; 1378 } 1379 1380 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1381 bool on) 1382 { 1383 return false; 1384 } 1385 1386 static inline int br_mdb_replay(struct net_device *br_dev, 1387 struct net_device *dev, const void *ctx, 1388 bool adding, struct notifier_block *nb, 1389 struct netlink_ext_ack *extack) 1390 { 1391 return -EOPNOTSUPP; 1392 } 1393 1394 static inline bool 1395 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1396 const struct net_bridge_mcast *brmctx2) 1397 { 1398 return true; 1399 } 1400 #endif 1401 1402 /* br_vlan.c */ 1403 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1404 bool br_allowed_ingress(const struct net_bridge *br, 1405 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1406 u16 *vid, u8 *state, 1407 struct net_bridge_vlan **vlan); 1408 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1409 const struct sk_buff *skb); 1410 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1411 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1412 const struct net_bridge_port *port, 1413 struct net_bridge_vlan_group *vg, 1414 struct sk_buff *skb); 1415 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1416 bool *changed, struct netlink_ext_ack *extack); 1417 int br_vlan_delete(struct net_bridge *br, u16 vid); 1418 void br_vlan_flush(struct net_bridge *br); 1419 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1420 void br_recalculate_fwd_mask(struct net_bridge *br); 1421 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1422 struct netlink_ext_ack *extack); 1423 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1424 struct netlink_ext_ack *extack); 1425 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1426 struct netlink_ext_ack *extack); 1427 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1428 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1429 int br_vlan_init(struct net_bridge *br); 1430 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1431 struct netlink_ext_ack *extack); 1432 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1433 struct netlink_ext_ack *extack); 1434 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1435 bool *changed, struct netlink_ext_ack *extack); 1436 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1437 void nbp_vlan_flush(struct net_bridge_port *port); 1438 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1439 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1440 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1441 struct pcpu_sw_netstats *stats); 1442 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1443 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1444 void *ptr); 1445 void br_vlan_rtnl_init(void); 1446 void br_vlan_rtnl_uninit(void); 1447 void br_vlan_notify(const struct net_bridge *br, 1448 const struct net_bridge_port *p, 1449 u16 vid, u16 vid_range, 1450 int cmd); 1451 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1452 const void *ctx, bool adding, struct notifier_block *nb, 1453 struct netlink_ext_ack *extack); 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 int br_vlan_replay(struct net_device *br_dev, 1701 struct net_device *dev, const void *ctx, 1702 bool adding, struct notifier_block *nb, 1703 struct netlink_ext_ack *extack) 1704 { 1705 return -EOPNOTSUPP; 1706 } 1707 #endif 1708 1709 /* br_vlan_options.c */ 1710 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1711 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1712 const struct net_bridge_vlan *range_end); 1713 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1714 size_t br_vlan_opts_nl_size(void); 1715 int br_vlan_process_options(const struct net_bridge *br, 1716 const struct net_bridge_port *p, 1717 struct net_bridge_vlan *range_start, 1718 struct net_bridge_vlan *range_end, 1719 struct nlattr **tb, 1720 struct netlink_ext_ack *extack); 1721 int br_vlan_rtm_process_global_options(struct net_device *dev, 1722 const struct nlattr *attr, 1723 int cmd, 1724 struct netlink_ext_ack *extack); 1725 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1726 const struct net_bridge_vlan *r_end); 1727 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1728 const struct net_bridge_vlan *v_opts); 1729 1730 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1731 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1732 { 1733 return READ_ONCE(v->state); 1734 } 1735 1736 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1737 { 1738 WRITE_ONCE(v->state, state); 1739 } 1740 1741 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1742 { 1743 return READ_ONCE(vg->pvid_state); 1744 } 1745 1746 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1747 u8 state) 1748 { 1749 WRITE_ONCE(vg->pvid_state, state); 1750 } 1751 1752 /* learn_allow is true at ingress and false at egress */ 1753 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1754 { 1755 switch (state) { 1756 case BR_STATE_LEARNING: 1757 return learn_allow; 1758 case BR_STATE_FORWARDING: 1759 return true; 1760 default: 1761 return false; 1762 } 1763 } 1764 #endif 1765 1766 struct nf_br_ops { 1767 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1768 }; 1769 extern const struct nf_br_ops __rcu *nf_br_ops; 1770 1771 /* br_netfilter.c */ 1772 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1773 int br_nf_core_init(void); 1774 void br_nf_core_fini(void); 1775 void br_netfilter_rtable_init(struct net_bridge *); 1776 #else 1777 static inline int br_nf_core_init(void) { return 0; } 1778 static inline void br_nf_core_fini(void) {} 1779 #define br_netfilter_rtable_init(x) 1780 #endif 1781 1782 /* br_stp.c */ 1783 void br_set_state(struct net_bridge_port *p, unsigned int state); 1784 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1785 void br_init_port(struct net_bridge_port *p); 1786 void br_become_designated_port(struct net_bridge_port *p); 1787 1788 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1789 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1790 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1791 int br_set_max_age(struct net_bridge *br, unsigned long x); 1792 int __set_ageing_time(struct net_device *dev, unsigned long t); 1793 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1794 1795 1796 /* br_stp_if.c */ 1797 void br_stp_enable_bridge(struct net_bridge *br); 1798 void br_stp_disable_bridge(struct net_bridge *br); 1799 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1800 struct netlink_ext_ack *extack); 1801 void br_stp_enable_port(struct net_bridge_port *p); 1802 void br_stp_disable_port(struct net_bridge_port *p); 1803 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1804 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1805 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1806 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1807 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1808 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1809 1810 /* br_stp_bpdu.c */ 1811 struct stp_proto; 1812 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1813 struct net_device *dev); 1814 1815 /* br_stp_timer.c */ 1816 void br_stp_timer_init(struct net_bridge *br); 1817 void br_stp_port_timer_init(struct net_bridge_port *p); 1818 unsigned long br_timer_value(const struct timer_list *timer); 1819 1820 /* br.c */ 1821 #if IS_ENABLED(CONFIG_ATM_LANE) 1822 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1823 #endif 1824 1825 /* br_mrp.c */ 1826 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1827 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1828 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1829 bool br_mrp_enabled(struct net_bridge *br); 1830 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1831 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1832 #else 1833 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1834 struct nlattr *attr, int cmd, 1835 struct netlink_ext_ack *extack) 1836 { 1837 return -EOPNOTSUPP; 1838 } 1839 1840 static inline bool br_mrp_enabled(struct net_bridge *br) 1841 { 1842 return false; 1843 } 1844 1845 static inline void br_mrp_port_del(struct net_bridge *br, 1846 struct net_bridge_port *p) 1847 { 1848 } 1849 1850 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1851 { 1852 return 0; 1853 } 1854 1855 #endif 1856 1857 /* br_cfm.c */ 1858 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1859 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1860 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1861 bool br_cfm_created(struct net_bridge *br); 1862 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1863 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1864 int br_cfm_status_fill_info(struct sk_buff *skb, 1865 struct net_bridge *br, 1866 bool getlink); 1867 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1868 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1869 #else 1870 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1871 struct nlattr *attr, int cmd, 1872 struct netlink_ext_ack *extack) 1873 { 1874 return -EOPNOTSUPP; 1875 } 1876 1877 static inline bool br_cfm_created(struct net_bridge *br) 1878 { 1879 return false; 1880 } 1881 1882 static inline void br_cfm_port_del(struct net_bridge *br, 1883 struct net_bridge_port *p) 1884 { 1885 } 1886 1887 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1888 { 1889 return -EOPNOTSUPP; 1890 } 1891 1892 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1893 struct net_bridge *br, 1894 bool getlink) 1895 { 1896 return -EOPNOTSUPP; 1897 } 1898 1899 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1900 { 1901 return -EOPNOTSUPP; 1902 } 1903 1904 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1905 { 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 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1980 struct netlink_ext_ack *extack); 1981 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1982 void br_switchdev_init(struct net_bridge *br); 1983 1984 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1985 { 1986 skb->offload_fwd_mark = 0; 1987 } 1988 #else 1989 static inline int 1990 br_switchdev_port_offload(struct net_bridge_port *p, 1991 struct net_device *dev, const void *ctx, 1992 struct notifier_block *atomic_nb, 1993 struct notifier_block *blocking_nb, 1994 bool tx_fwd_offload, 1995 struct netlink_ext_ack *extack) 1996 { 1997 return -EOPNOTSUPP; 1998 } 1999 2000 static inline void 2001 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2002 struct notifier_block *atomic_nb, 2003 struct notifier_block *blocking_nb) 2004 { 2005 } 2006 2007 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2008 { 2009 return false; 2010 } 2011 2012 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2013 { 2014 } 2015 2016 static inline void 2017 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2018 struct sk_buff *skb) 2019 { 2020 } 2021 2022 static inline void 2023 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2024 struct sk_buff *skb) 2025 { 2026 } 2027 2028 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2029 struct sk_buff *skb) 2030 { 2031 } 2032 2033 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2034 const struct sk_buff *skb) 2035 { 2036 return true; 2037 } 2038 2039 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2040 unsigned long flags, 2041 unsigned long mask, 2042 struct netlink_ext_ack *extack) 2043 { 2044 return 0; 2045 } 2046 2047 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2048 u16 vid, u16 flags, 2049 struct netlink_ext_ack *extack) 2050 { 2051 return -EOPNOTSUPP; 2052 } 2053 2054 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2055 { 2056 return -EOPNOTSUPP; 2057 } 2058 2059 static inline void 2060 br_switchdev_fdb_notify(struct net_bridge *br, 2061 const struct net_bridge_fdb_entry *fdb, int type) 2062 { 2063 } 2064 2065 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2066 { 2067 } 2068 2069 static inline void br_switchdev_init(struct net_bridge *br) 2070 { 2071 } 2072 2073 #endif /* CONFIG_NET_SWITCHDEV */ 2074 2075 /* br_arp_nd_proxy.c */ 2076 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2077 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2078 u16 vid, struct net_bridge_port *p); 2079 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2080 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2081 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2082 #endif 2083