1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_HWDOM_MAX BITS_PER_LONG 33 34 #define BR_VERSION "2.3" 35 36 /* Control of forwarding link local multicast */ 37 #define BR_GROUPFWD_DEFAULT 0 38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 39 enum { 40 BR_GROUPFWD_STP = BIT(0), 41 BR_GROUPFWD_MACPAUSE = BIT(1), 42 BR_GROUPFWD_LACP = BIT(2), 43 }; 44 45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 46 BR_GROUPFWD_LACP) 47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 48 #define BR_GROUPFWD_8021AD 0xB801u 49 50 /* Path to usermode spanning tree program */ 51 #define BR_STP_PROG "/sbin/bridge-stp" 52 53 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 54 55 typedef struct bridge_id bridge_id; 56 typedef struct mac_addr mac_addr; 57 typedef __u16 port_id; 58 59 struct bridge_id { 60 unsigned char prio[2]; 61 unsigned char addr[ETH_ALEN]; 62 }; 63 64 struct mac_addr { 65 unsigned char addr[ETH_ALEN]; 66 }; 67 68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 69 /* our own querier */ 70 struct bridge_mcast_own_query { 71 struct timer_list timer; 72 u32 startup_sent; 73 }; 74 75 /* other querier */ 76 struct bridge_mcast_other_query { 77 struct timer_list timer; 78 unsigned long delay_time; 79 }; 80 81 /* selected querier */ 82 struct bridge_mcast_querier { 83 struct br_ip addr; 84 struct net_bridge_port __rcu *port; 85 }; 86 87 /* IGMP/MLD statistics */ 88 struct bridge_mcast_stats { 89 struct br_mcast_stats mstats; 90 struct u64_stats_sync syncp; 91 }; 92 #endif 93 94 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 95 struct net_bridge_mcast_port { 96 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 97 struct net_bridge_port *port; 98 struct net_bridge_vlan *vlan; 99 100 struct bridge_mcast_own_query ip4_own_query; 101 struct timer_list ip4_mc_router_timer; 102 struct hlist_node ip4_rlist; 103 #if IS_ENABLED(CONFIG_IPV6) 104 struct bridge_mcast_own_query ip6_own_query; 105 struct timer_list ip6_mc_router_timer; 106 struct hlist_node ip6_rlist; 107 #endif /* IS_ENABLED(CONFIG_IPV6) */ 108 unsigned char multicast_router; 109 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 110 }; 111 112 /* net_bridge_mcast must be always defined due to forwarding stubs */ 113 struct net_bridge_mcast { 114 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 115 struct net_bridge *br; 116 struct net_bridge_vlan *vlan; 117 118 u32 multicast_last_member_count; 119 u32 multicast_startup_query_count; 120 121 u8 multicast_igmp_version; 122 u8 multicast_router; 123 #if IS_ENABLED(CONFIG_IPV6) 124 u8 multicast_mld_version; 125 #endif 126 unsigned long multicast_last_member_interval; 127 unsigned long multicast_membership_interval; 128 unsigned long multicast_querier_interval; 129 unsigned long multicast_query_interval; 130 unsigned long multicast_query_response_interval; 131 unsigned long multicast_startup_query_interval; 132 struct hlist_head ip4_mc_router_list; 133 struct timer_list ip4_mc_router_timer; 134 struct bridge_mcast_other_query ip4_other_query; 135 struct bridge_mcast_own_query ip4_own_query; 136 struct bridge_mcast_querier ip4_querier; 137 #if IS_ENABLED(CONFIG_IPV6) 138 struct hlist_head ip6_mc_router_list; 139 struct timer_list ip6_mc_router_timer; 140 struct bridge_mcast_other_query ip6_other_query; 141 struct bridge_mcast_own_query ip6_own_query; 142 struct bridge_mcast_querier ip6_querier; 143 #endif /* IS_ENABLED(CONFIG_IPV6) */ 144 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 145 }; 146 147 struct br_tunnel_info { 148 __be64 tunnel_id; 149 struct metadata_dst __rcu *tunnel_dst; 150 }; 151 152 /* private vlan flags */ 153 enum { 154 BR_VLFLAG_PER_PORT_STATS = BIT(0), 155 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 156 BR_VLFLAG_MCAST_ENABLED = BIT(2), 157 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 158 }; 159 160 /** 161 * struct net_bridge_vlan - per-vlan entry 162 * 163 * @vnode: rhashtable member 164 * @vid: VLAN id 165 * @flags: bridge vlan flags 166 * @priv_flags: private (in-kernel) bridge vlan flags 167 * @state: STP state (e.g. blocking, learning, forwarding) 168 * @stats: per-cpu VLAN statistics 169 * @br: if MASTER flag set, this points to a bridge struct 170 * @port: if MASTER flag unset, this points to a port struct 171 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 172 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 173 * for this VLAN entry 174 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 175 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 176 * context 177 * @vlist: sorted list of VLAN entries 178 * @rcu: used for entry destruction 179 * 180 * This structure is shared between the global per-VLAN entries contained in 181 * the bridge rhashtable and the local per-port per-VLAN entries contained in 182 * the port's rhashtable. The union entries should be interpreted depending on 183 * the entry flags that are set. 184 */ 185 struct net_bridge_vlan { 186 struct rhash_head vnode; 187 struct rhash_head tnode; 188 u16 vid; 189 u16 flags; 190 u16 priv_flags; 191 u8 state; 192 struct pcpu_sw_netstats __percpu *stats; 193 union { 194 struct net_bridge *br; 195 struct net_bridge_port *port; 196 }; 197 union { 198 refcount_t refcnt; 199 struct net_bridge_vlan *brvlan; 200 }; 201 202 struct br_tunnel_info tinfo; 203 204 union { 205 struct net_bridge_mcast br_mcast_ctx; 206 struct net_bridge_mcast_port port_mcast_ctx; 207 }; 208 209 struct list_head vlist; 210 211 struct rcu_head rcu; 212 }; 213 214 /** 215 * struct net_bridge_vlan_group 216 * 217 * @vlan_hash: VLAN entry rhashtable 218 * @vlan_list: sorted VLAN entry list 219 * @num_vlans: number of total VLAN entries 220 * @pvid: PVID VLAN id 221 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 222 * 223 * IMPORTANT: Be careful when checking if there're VLAN entries using list 224 * primitives because the bridge can have entries in its list which 225 * are just for global context but not for filtering, i.e. they have 226 * the master flag set but not the brentry flag. If you have to check 227 * if there're "real" entries in the bridge please test @num_vlans 228 */ 229 struct net_bridge_vlan_group { 230 struct rhashtable vlan_hash; 231 struct rhashtable tunnel_hash; 232 struct list_head vlan_list; 233 u16 num_vlans; 234 u16 pvid; 235 u8 pvid_state; 236 }; 237 238 /* bridge fdb flags */ 239 enum { 240 BR_FDB_LOCAL, 241 BR_FDB_STATIC, 242 BR_FDB_STICKY, 243 BR_FDB_ADDED_BY_USER, 244 BR_FDB_ADDED_BY_EXT_LEARN, 245 BR_FDB_OFFLOADED, 246 BR_FDB_NOTIFY, 247 BR_FDB_NOTIFY_INACTIVE 248 }; 249 250 struct net_bridge_fdb_key { 251 mac_addr addr; 252 u16 vlan_id; 253 }; 254 255 struct net_bridge_fdb_entry { 256 struct rhash_head rhnode; 257 struct net_bridge_port *dst; 258 259 struct net_bridge_fdb_key key; 260 struct hlist_node fdb_node; 261 unsigned long flags; 262 263 /* write-heavy members should not affect lookups */ 264 unsigned long updated ____cacheline_aligned_in_smp; 265 unsigned long used; 266 267 struct rcu_head rcu; 268 }; 269 270 #define MDB_PG_FLAGS_PERMANENT BIT(0) 271 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 272 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 273 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 274 #define MDB_PG_FLAGS_BLOCKED BIT(4) 275 276 #define PG_SRC_ENT_LIMIT 32 277 278 #define BR_SGRP_F_DELETE BIT(0) 279 #define BR_SGRP_F_SEND BIT(1) 280 #define BR_SGRP_F_INSTALLED BIT(2) 281 282 struct net_bridge_mcast_gc { 283 struct hlist_node gc_node; 284 void (*destroy)(struct net_bridge_mcast_gc *gc); 285 }; 286 287 struct net_bridge_group_src { 288 struct hlist_node node; 289 290 struct br_ip addr; 291 struct net_bridge_port_group *pg; 292 u8 flags; 293 u8 src_query_rexmit_cnt; 294 struct timer_list timer; 295 296 struct net_bridge *br; 297 struct net_bridge_mcast_gc mcast_gc; 298 struct rcu_head rcu; 299 }; 300 301 struct net_bridge_port_group_sg_key { 302 struct net_bridge_port *port; 303 struct br_ip addr; 304 }; 305 306 struct net_bridge_port_group { 307 struct net_bridge_port_group __rcu *next; 308 struct net_bridge_port_group_sg_key key; 309 unsigned char eth_addr[ETH_ALEN] __aligned(2); 310 unsigned char flags; 311 unsigned char filter_mode; 312 unsigned char grp_query_rexmit_cnt; 313 unsigned char rt_protocol; 314 315 struct hlist_head src_list; 316 unsigned int src_ents; 317 struct timer_list timer; 318 struct timer_list rexmit_timer; 319 struct hlist_node mglist; 320 struct rb_root eht_set_tree; 321 struct rb_root eht_host_tree; 322 323 struct rhash_head rhnode; 324 struct net_bridge_mcast_gc mcast_gc; 325 struct rcu_head rcu; 326 }; 327 328 struct net_bridge_mdb_entry { 329 struct rhash_head rhnode; 330 struct net_bridge *br; 331 struct net_bridge_port_group __rcu *ports; 332 struct br_ip addr; 333 bool host_joined; 334 335 struct timer_list timer; 336 struct hlist_node mdb_node; 337 338 struct net_bridge_mcast_gc mcast_gc; 339 struct rcu_head rcu; 340 }; 341 342 struct net_bridge_port { 343 struct net_bridge *br; 344 struct net_device *dev; 345 struct list_head list; 346 347 unsigned long flags; 348 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 349 struct net_bridge_vlan_group __rcu *vlgrp; 350 #endif 351 struct net_bridge_port __rcu *backup_port; 352 353 /* STP */ 354 u8 priority; 355 u8 state; 356 u16 port_no; 357 unsigned char topology_change_ack; 358 unsigned char config_pending; 359 port_id port_id; 360 port_id designated_port; 361 bridge_id designated_root; 362 bridge_id designated_bridge; 363 u32 path_cost; 364 u32 designated_cost; 365 unsigned long designated_age; 366 367 struct timer_list forward_delay_timer; 368 struct timer_list hold_timer; 369 struct timer_list message_age_timer; 370 struct kobject kobj; 371 struct rcu_head rcu; 372 373 struct net_bridge_mcast_port multicast_ctx; 374 375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 376 struct bridge_mcast_stats __percpu *mcast_stats; 377 378 u32 multicast_eht_hosts_limit; 379 u32 multicast_eht_hosts_cnt; 380 struct hlist_head mglist; 381 #endif 382 383 #ifdef CONFIG_SYSFS 384 char sysfs_name[IFNAMSIZ]; 385 #endif 386 387 #ifdef CONFIG_NET_POLL_CONTROLLER 388 struct netpoll *np; 389 #endif 390 #ifdef CONFIG_NET_SWITCHDEV 391 /* Identifier used to group ports that share the same switchdev 392 * hardware domain. 393 */ 394 int hwdom; 395 int offload_count; 396 struct netdev_phys_item_id ppid; 397 #endif 398 u16 group_fwd_mask; 399 u16 backup_redirected_cnt; 400 401 struct bridge_stp_xstats stp_xstats; 402 }; 403 404 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 405 406 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 407 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 408 409 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 410 { 411 return rcu_dereference(dev->rx_handler_data); 412 } 413 414 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 415 { 416 return netif_is_bridge_port(dev) ? 417 rtnl_dereference(dev->rx_handler_data) : NULL; 418 } 419 420 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 421 { 422 return netif_is_bridge_port(dev) ? 423 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 424 } 425 426 enum net_bridge_opts { 427 BROPT_VLAN_ENABLED, 428 BROPT_VLAN_STATS_ENABLED, 429 BROPT_NF_CALL_IPTABLES, 430 BROPT_NF_CALL_IP6TABLES, 431 BROPT_NF_CALL_ARPTABLES, 432 BROPT_GROUP_ADDR_SET, 433 BROPT_MULTICAST_ENABLED, 434 BROPT_MULTICAST_QUERIER, 435 BROPT_MULTICAST_QUERY_USE_IFADDR, 436 BROPT_MULTICAST_STATS_ENABLED, 437 BROPT_HAS_IPV6_ADDR, 438 BROPT_NEIGH_SUPPRESS_ENABLED, 439 BROPT_MTU_SET_BY_USER, 440 BROPT_VLAN_STATS_PER_PORT, 441 BROPT_NO_LL_LEARN, 442 BROPT_VLAN_BRIDGE_BINDING, 443 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 444 }; 445 446 struct net_bridge { 447 spinlock_t lock; 448 spinlock_t hash_lock; 449 struct hlist_head frame_type_list; 450 struct net_device *dev; 451 unsigned long options; 452 /* These fields are accessed on each packet */ 453 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 454 __be16 vlan_proto; 455 u16 default_pvid; 456 struct net_bridge_vlan_group __rcu *vlgrp; 457 #endif 458 459 struct rhashtable fdb_hash_tbl; 460 struct list_head port_list; 461 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 462 union { 463 struct rtable fake_rtable; 464 struct rt6_info fake_rt6_info; 465 }; 466 #endif 467 u16 group_fwd_mask; 468 u16 group_fwd_mask_required; 469 470 /* STP */ 471 bridge_id designated_root; 472 bridge_id bridge_id; 473 unsigned char topology_change; 474 unsigned char topology_change_detected; 475 u16 root_port; 476 unsigned long max_age; 477 unsigned long hello_time; 478 unsigned long forward_delay; 479 unsigned long ageing_time; 480 unsigned long bridge_max_age; 481 unsigned long bridge_hello_time; 482 unsigned long bridge_forward_delay; 483 unsigned long bridge_ageing_time; 484 u32 root_path_cost; 485 486 u8 group_addr[ETH_ALEN]; 487 488 enum { 489 BR_NO_STP, /* no spanning tree */ 490 BR_KERNEL_STP, /* old STP in kernel */ 491 BR_USER_STP, /* new RSTP in userspace */ 492 } stp_enabled; 493 494 struct net_bridge_mcast multicast_ctx; 495 496 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 497 struct bridge_mcast_stats __percpu *mcast_stats; 498 499 u32 hash_max; 500 501 spinlock_t multicast_lock; 502 503 struct rhashtable mdb_hash_tbl; 504 struct rhashtable sg_port_tbl; 505 506 struct hlist_head mcast_gc_list; 507 struct hlist_head mdb_list; 508 509 struct work_struct mcast_gc_work; 510 #endif 511 512 struct timer_list hello_timer; 513 struct timer_list tcn_timer; 514 struct timer_list topology_change_timer; 515 struct delayed_work gc_work; 516 struct kobject *ifobj; 517 u32 auto_cnt; 518 519 #ifdef CONFIG_NET_SWITCHDEV 520 /* Counter used to make sure that hardware domains get unique 521 * identifiers in case a bridge spans multiple switchdev instances. 522 */ 523 int last_hwdom; 524 /* Bit mask of hardware domain numbers in use */ 525 unsigned long busy_hwdoms; 526 #endif 527 struct hlist_head fdb_list; 528 529 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 530 struct hlist_head mrp_list; 531 #endif 532 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 533 struct hlist_head mep_list; 534 #endif 535 }; 536 537 struct br_input_skb_cb { 538 struct net_device *brdev; 539 540 u16 frag_max_size; 541 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 542 u8 igmp; 543 u8 mrouters_only:1; 544 #endif 545 u8 proxyarp_replied:1; 546 u8 src_port_isolated:1; 547 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 548 u8 vlan_filtered:1; 549 #endif 550 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 551 u8 br_netfilter_broute:1; 552 #endif 553 554 #ifdef CONFIG_NET_SWITCHDEV 555 /* Set if TX data plane offloading is used towards at least one 556 * hardware domain. 557 */ 558 u8 tx_fwd_offload:1; 559 /* The switchdev hardware domain from which this packet was received. 560 * If skb->offload_fwd_mark was set, then this packet was already 561 * forwarded by hardware to the other ports in the source hardware 562 * domain, otherwise it wasn't. 563 */ 564 int src_hwdom; 565 /* Bit mask of hardware domains towards this packet has already been 566 * transmitted using the TX data plane offload. 567 */ 568 unsigned long fwd_hwdoms; 569 #endif 570 }; 571 572 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 573 574 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 575 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 576 #else 577 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 578 #endif 579 580 #define br_printk(level, br, format, args...) \ 581 printk(level "%s: " format, (br)->dev->name, ##args) 582 583 #define br_err(__br, format, args...) \ 584 br_printk(KERN_ERR, __br, format, ##args) 585 #define br_warn(__br, format, args...) \ 586 br_printk(KERN_WARNING, __br, format, ##args) 587 #define br_notice(__br, format, args...) \ 588 br_printk(KERN_NOTICE, __br, format, ##args) 589 #define br_info(__br, format, args...) \ 590 br_printk(KERN_INFO, __br, format, ##args) 591 592 #define br_debug(br, format, args...) \ 593 pr_debug("%s: " format, (br)->dev->name, ##args) 594 595 /* called under bridge lock */ 596 static inline int br_is_root_bridge(const struct net_bridge *br) 597 { 598 return !memcmp(&br->bridge_id, &br->designated_root, 8); 599 } 600 601 /* check if a VLAN entry is global */ 602 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 603 { 604 return v->flags & BRIDGE_VLAN_INFO_MASTER; 605 } 606 607 /* check if a VLAN entry is used by the bridge */ 608 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 609 { 610 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 611 } 612 613 /* check if we should use the vlan entry, returns false if it's only context */ 614 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 615 { 616 if (br_vlan_is_master(v)) { 617 if (br_vlan_is_brentry(v)) 618 return true; 619 else 620 return false; 621 } 622 623 return true; 624 } 625 626 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 627 { 628 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 629 } 630 631 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 632 { 633 bool ret = vid > 0 && vid < VLAN_VID_MASK; 634 635 if (!ret) 636 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 637 638 return ret; 639 } 640 641 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 642 const struct bridge_vlan_info *last, 643 struct netlink_ext_ack *extack) 644 { 645 /* pvid flag is not allowed in ranges */ 646 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 647 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 648 return false; 649 } 650 651 /* when cur is the range end, check if: 652 * - it has range start flag 653 * - range ids are invalid (end is equal to or before start) 654 */ 655 if (last) { 656 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 657 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 658 return false; 659 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 660 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 661 return false; 662 } else if (cur->vid <= last->vid) { 663 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 664 return false; 665 } 666 } 667 668 /* check for required range flags */ 669 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 670 BRIDGE_VLAN_INFO_RANGE_END))) { 671 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 672 return false; 673 } 674 675 return true; 676 } 677 678 static inline int br_afspec_cmd_to_rtm(int cmd) 679 { 680 switch (cmd) { 681 case RTM_SETLINK: 682 return RTM_NEWVLAN; 683 case RTM_DELLINK: 684 return RTM_DELVLAN; 685 } 686 687 return 0; 688 } 689 690 static inline int br_opt_get(const struct net_bridge *br, 691 enum net_bridge_opts opt) 692 { 693 return test_bit(opt, &br->options); 694 } 695 696 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 697 struct netlink_ext_ack *extack); 698 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 699 int br_boolopt_multi_toggle(struct net_bridge *br, 700 struct br_boolopt_multi *bm, 701 struct netlink_ext_ack *extack); 702 void br_boolopt_multi_get(const struct net_bridge *br, 703 struct br_boolopt_multi *bm); 704 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 705 706 /* br_device.c */ 707 void br_dev_setup(struct net_device *dev); 708 void br_dev_delete(struct net_device *dev, struct list_head *list); 709 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 710 #ifdef CONFIG_NET_POLL_CONTROLLER 711 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 712 struct sk_buff *skb) 713 { 714 netpoll_send_skb(p->np, skb); 715 } 716 717 int br_netpoll_enable(struct net_bridge_port *p); 718 void br_netpoll_disable(struct net_bridge_port *p); 719 #else 720 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 721 struct sk_buff *skb) 722 { 723 } 724 725 static inline int br_netpoll_enable(struct net_bridge_port *p) 726 { 727 return 0; 728 } 729 730 static inline void br_netpoll_disable(struct net_bridge_port *p) 731 { 732 } 733 #endif 734 735 /* br_fdb.c */ 736 int br_fdb_init(void); 737 void br_fdb_fini(void); 738 int br_fdb_hash_init(struct net_bridge *br); 739 void br_fdb_hash_fini(struct net_bridge *br); 740 void br_fdb_flush(struct net_bridge *br); 741 void br_fdb_find_delete_local(struct net_bridge *br, 742 const struct net_bridge_port *p, 743 const unsigned char *addr, u16 vid); 744 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 745 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 746 void br_fdb_cleanup(struct work_struct *work); 747 void br_fdb_delete_by_port(struct net_bridge *br, 748 const struct net_bridge_port *p, u16 vid, int do_all); 749 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 750 const unsigned char *addr, 751 __u16 vid); 752 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 753 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 754 unsigned long off); 755 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 756 const unsigned char *addr, u16 vid); 757 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 758 const unsigned char *addr, u16 vid, unsigned long flags); 759 760 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 761 struct net_device *dev, const unsigned char *addr, u16 vid); 762 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 763 const unsigned char *addr, u16 vid, u16 nlh_flags, 764 struct netlink_ext_ack *extack); 765 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 766 struct net_device *dev, struct net_device *fdev, int *idx); 767 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 768 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 769 struct netlink_ext_ack *extack); 770 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 771 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 772 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 773 const unsigned char *addr, u16 vid, bool is_local, 774 bool swdev_notify); 775 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 776 const unsigned char *addr, u16 vid, 777 bool swdev_notify); 778 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 779 const unsigned char *addr, u16 vid, bool offloaded); 780 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding, 781 struct notifier_block *nb); 782 783 /* br_forward.c */ 784 enum br_pkt_type { 785 BR_PKT_UNICAST, 786 BR_PKT_MULTICAST, 787 BR_PKT_BROADCAST 788 }; 789 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 790 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 791 bool local_rcv, bool local_orig); 792 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 793 void br_flood(struct net_bridge *br, struct sk_buff *skb, 794 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 795 796 /* return true if both source port and dest port are isolated */ 797 static inline bool br_skb_isolated(const struct net_bridge_port *to, 798 const struct sk_buff *skb) 799 { 800 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 801 (to->flags & BR_ISOLATED); 802 } 803 804 /* br_if.c */ 805 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 806 int br_add_bridge(struct net *net, const char *name); 807 int br_del_bridge(struct net *net, const char *name); 808 int br_add_if(struct net_bridge *br, struct net_device *dev, 809 struct netlink_ext_ack *extack); 810 int br_del_if(struct net_bridge *br, struct net_device *dev); 811 void br_mtu_auto_adjust(struct net_bridge *br); 812 netdev_features_t br_features_recompute(struct net_bridge *br, 813 netdev_features_t features); 814 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 815 void br_manage_promisc(struct net_bridge *br); 816 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 817 818 /* br_input.c */ 819 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 820 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 821 822 struct br_frame_type { 823 __be16 type; 824 int (*frame_handler)(struct net_bridge_port *port, 825 struct sk_buff *skb); 826 struct hlist_node list; 827 }; 828 829 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 830 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 831 832 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 833 { 834 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 835 } 836 837 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 838 { 839 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 840 } 841 842 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 843 { 844 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 845 } 846 847 static inline struct net_bridge_port * 848 br_port_get_check_rtnl(const struct net_device *dev) 849 { 850 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 851 } 852 853 /* br_ioctl.c */ 854 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 855 void __user *data, int cmd); 856 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 857 struct ifreq *ifr, void __user *uarg); 858 859 /* br_multicast.c */ 860 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 861 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 862 struct net_bridge_mcast_port **pmctx, 863 struct net_bridge_vlan *vlan, 864 struct sk_buff *skb, u16 vid); 865 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 866 struct sk_buff *skb, u16 vid); 867 int br_multicast_add_port(struct net_bridge_port *port); 868 void br_multicast_del_port(struct net_bridge_port *port); 869 void br_multicast_enable_port(struct net_bridge_port *port); 870 void br_multicast_disable_port(struct net_bridge_port *port); 871 void br_multicast_init(struct net_bridge *br); 872 void br_multicast_join_snoopers(struct net_bridge *br); 873 void br_multicast_leave_snoopers(struct net_bridge *br); 874 void br_multicast_open(struct net_bridge *br); 875 void br_multicast_stop(struct net_bridge *br); 876 void br_multicast_dev_del(struct net_bridge *br); 877 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 878 struct net_bridge_mcast *brmctx, 879 bool local_rcv, bool local_orig); 880 int br_multicast_set_router(struct net_bridge *br, unsigned long val); 881 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 882 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 883 struct netlink_ext_ack *extack); 884 int br_multicast_set_querier(struct net_bridge *br, unsigned long val); 885 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 886 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 887 unsigned long val); 888 #if IS_ENABLED(CONFIG_IPV6) 889 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 890 unsigned long val); 891 #endif 892 struct net_bridge_mdb_entry * 893 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 894 struct net_bridge_mdb_entry * 895 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 896 struct net_bridge_port_group * 897 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 898 struct net_bridge_port_group __rcu *next, 899 unsigned char flags, const unsigned char *src, 900 u8 filter_mode, u8 rt_protocol); 901 int br_mdb_hash_init(struct net_bridge *br); 902 void br_mdb_hash_fini(struct net_bridge *br); 903 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 904 struct net_bridge_port_group *pg, int type); 905 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 906 int type); 907 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 908 struct net_bridge_port_group *pg, 909 struct net_bridge_port_group __rcu **pp); 910 void br_multicast_count(struct net_bridge *br, 911 const struct net_bridge_port *p, 912 const struct sk_buff *skb, u8 type, u8 dir); 913 int br_multicast_init_stats(struct net_bridge *br); 914 void br_multicast_uninit_stats(struct net_bridge *br); 915 void br_multicast_get_stats(const struct net_bridge *br, 916 const struct net_bridge_port *p, 917 struct br_mcast_stats *dest); 918 void br_mdb_init(void); 919 void br_mdb_uninit(void); 920 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 921 struct net_bridge_mdb_entry *mp, bool notify); 922 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 923 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 924 u8 filter_mode); 925 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 926 struct net_bridge_port_group *sg); 927 struct net_bridge_group_src * 928 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 929 void br_multicast_del_group_src(struct net_bridge_group_src *src, 930 bool fastleave); 931 void br_multicast_ctx_init(struct net_bridge *br, 932 struct net_bridge_vlan *vlan, 933 struct net_bridge_mcast *brmctx); 934 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 935 void br_multicast_port_ctx_init(struct net_bridge_port *port, 936 struct net_bridge_vlan *vlan, 937 struct net_bridge_mcast_port *pmctx); 938 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 939 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 940 void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, bool on); 941 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 942 struct netlink_ext_ack *extack); 943 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 944 945 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 946 const void *ctx, bool adding, struct notifier_block *nb, 947 struct netlink_ext_ack *extack); 948 949 static inline bool br_group_is_l2(const struct br_ip *group) 950 { 951 return group->proto == 0; 952 } 953 954 #define mlock_dereference(X, br) \ 955 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 956 957 static inline struct hlist_node * 958 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 959 struct sk_buff *skb) 960 { 961 #if IS_ENABLED(CONFIG_IPV6) 962 if (skb->protocol == htons(ETH_P_IPV6)) 963 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 964 #endif 965 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 966 } 967 968 static inline struct net_bridge_port * 969 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 970 { 971 struct net_bridge_mcast_port *mctx; 972 973 #if IS_ENABLED(CONFIG_IPV6) 974 if (skb->protocol == htons(ETH_P_IPV6)) 975 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 976 ip6_rlist); 977 else 978 #endif 979 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 980 ip4_rlist); 981 982 if (mctx) 983 return mctx->port; 984 else 985 return NULL; 986 } 987 988 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 989 { 990 return timer_pending(&brmctx->ip4_mc_router_timer); 991 } 992 993 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 994 { 995 #if IS_ENABLED(CONFIG_IPV6) 996 return timer_pending(&brmctx->ip6_mc_router_timer); 997 #else 998 return false; 999 #endif 1000 } 1001 1002 static inline bool 1003 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1004 { 1005 switch (brmctx->multicast_router) { 1006 case MDB_RTR_TYPE_PERM: 1007 return true; 1008 case MDB_RTR_TYPE_TEMP_QUERY: 1009 if (skb) { 1010 if (skb->protocol == htons(ETH_P_IP)) 1011 return br_ip4_multicast_is_router(brmctx); 1012 else if (skb->protocol == htons(ETH_P_IPV6)) 1013 return br_ip6_multicast_is_router(brmctx); 1014 } else { 1015 return br_ip4_multicast_is_router(brmctx) || 1016 br_ip6_multicast_is_router(brmctx); 1017 } 1018 fallthrough; 1019 default: 1020 return false; 1021 } 1022 } 1023 1024 static inline bool 1025 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1026 struct bridge_mcast_other_query *querier, 1027 const bool is_ipv6) 1028 { 1029 bool own_querier_enabled; 1030 1031 if (br_opt_get(brmctx->br, BROPT_MULTICAST_QUERIER)) { 1032 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1033 own_querier_enabled = false; 1034 else 1035 own_querier_enabled = true; 1036 } else { 1037 own_querier_enabled = false; 1038 } 1039 1040 return time_is_before_jiffies(querier->delay_time) && 1041 (own_querier_enabled || timer_pending(&querier->timer)); 1042 } 1043 1044 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1045 struct ethhdr *eth, 1046 const struct net_bridge_mdb_entry *mdb) 1047 { 1048 switch (eth->h_proto) { 1049 case (htons(ETH_P_IP)): 1050 return __br_multicast_querier_exists(brmctx, 1051 &brmctx->ip4_other_query, false); 1052 #if IS_ENABLED(CONFIG_IPV6) 1053 case (htons(ETH_P_IPV6)): 1054 return __br_multicast_querier_exists(brmctx, 1055 &brmctx->ip6_other_query, true); 1056 #endif 1057 default: 1058 return !!mdb && br_group_is_l2(&mdb->addr); 1059 } 1060 } 1061 1062 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1063 { 1064 switch (ip->proto) { 1065 case htons(ETH_P_IP): 1066 return ipv4_is_zeronet(ip->src.ip4); 1067 #if IS_ENABLED(CONFIG_IPV6) 1068 case htons(ETH_P_IPV6): 1069 return ipv6_addr_any(&ip->src.ip6); 1070 #endif 1071 default: 1072 return false; 1073 } 1074 } 1075 1076 static inline bool 1077 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1078 __be16 proto) 1079 { 1080 switch (proto) { 1081 case htons(ETH_P_IP): 1082 return !!(brmctx->multicast_igmp_version == 3); 1083 #if IS_ENABLED(CONFIG_IPV6) 1084 case htons(ETH_P_IPV6): 1085 return !!(brmctx->multicast_mld_version == 2); 1086 #endif 1087 default: 1088 return false; 1089 } 1090 } 1091 1092 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1093 { 1094 return BR_INPUT_SKB_CB(skb)->igmp; 1095 } 1096 1097 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1098 { 1099 return brmctx->multicast_last_member_interval * 1100 brmctx->multicast_last_member_count; 1101 } 1102 1103 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1104 { 1105 /* use the RFC default of 2 for QRV */ 1106 return 2 * brmctx->multicast_query_interval + 1107 brmctx->multicast_query_response_interval; 1108 } 1109 1110 static inline bool 1111 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1112 { 1113 return !!brmctx->vlan; 1114 } 1115 1116 static inline bool 1117 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1118 { 1119 return !!pmctx->vlan; 1120 } 1121 1122 static inline struct net_bridge_mcast * 1123 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1124 { 1125 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1126 return &pmctx->port->br->multicast_ctx; 1127 else 1128 return &pmctx->vlan->brvlan->br_mcast_ctx; 1129 } 1130 1131 static inline bool 1132 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1133 { 1134 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1135 br_multicast_ctx_is_vlan(brmctx) && 1136 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1137 } 1138 1139 static inline bool 1140 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1141 { 1142 return br_multicast_ctx_is_vlan(brmctx) && 1143 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1144 } 1145 1146 static inline bool 1147 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1148 { 1149 return br_multicast_port_ctx_is_vlan(pmctx) && 1150 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1151 } 1152 1153 static inline bool 1154 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1155 { 1156 return pmctx->port->state == BR_STATE_DISABLED || 1157 (br_multicast_port_ctx_is_vlan(pmctx) && 1158 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1159 pmctx->vlan->state == BR_STATE_DISABLED)); 1160 } 1161 1162 static inline bool 1163 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1164 { 1165 return br_multicast_port_ctx_state_disabled(pmctx) || 1166 pmctx->port->state == BR_STATE_BLOCKING || 1167 (br_multicast_port_ctx_is_vlan(pmctx) && 1168 pmctx->vlan->state == BR_STATE_BLOCKING); 1169 } 1170 1171 static inline bool 1172 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1173 const struct net_bridge_mcast *brmctx2) 1174 { 1175 return brmctx1->multicast_igmp_version == 1176 brmctx2->multicast_igmp_version && 1177 brmctx1->multicast_last_member_count == 1178 brmctx2->multicast_last_member_count && 1179 brmctx1->multicast_startup_query_count == 1180 brmctx2->multicast_startup_query_count && 1181 brmctx1->multicast_last_member_interval == 1182 brmctx2->multicast_last_member_interval && 1183 brmctx1->multicast_membership_interval == 1184 brmctx2->multicast_membership_interval && 1185 brmctx1->multicast_querier_interval == 1186 brmctx2->multicast_querier_interval && 1187 brmctx1->multicast_query_interval == 1188 brmctx2->multicast_query_interval && 1189 brmctx1->multicast_query_response_interval == 1190 brmctx2->multicast_query_response_interval && 1191 #if IS_ENABLED(CONFIG_IPV6) 1192 brmctx1->multicast_mld_version == 1193 brmctx2->multicast_mld_version && 1194 #endif 1195 true; 1196 } 1197 #else 1198 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1199 struct net_bridge_mcast_port **pmctx, 1200 struct net_bridge_vlan *vlan, 1201 struct sk_buff *skb, 1202 u16 vid) 1203 { 1204 return 0; 1205 } 1206 1207 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1208 struct sk_buff *skb, u16 vid) 1209 { 1210 return NULL; 1211 } 1212 1213 static inline int br_multicast_add_port(struct net_bridge_port *port) 1214 { 1215 return 0; 1216 } 1217 1218 static inline void br_multicast_del_port(struct net_bridge_port *port) 1219 { 1220 } 1221 1222 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1223 { 1224 } 1225 1226 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1227 { 1228 } 1229 1230 static inline void br_multicast_init(struct net_bridge *br) 1231 { 1232 } 1233 1234 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1235 { 1236 } 1237 1238 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1239 { 1240 } 1241 1242 static inline void br_multicast_open(struct net_bridge *br) 1243 { 1244 } 1245 1246 static inline void br_multicast_stop(struct net_bridge *br) 1247 { 1248 } 1249 1250 static inline void br_multicast_dev_del(struct net_bridge *br) 1251 { 1252 } 1253 1254 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1255 struct sk_buff *skb, 1256 struct net_bridge_mcast *brmctx, 1257 bool local_rcv, bool local_orig) 1258 { 1259 } 1260 1261 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1262 struct sk_buff *skb) 1263 { 1264 return false; 1265 } 1266 1267 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1268 struct ethhdr *eth, 1269 const struct net_bridge_mdb_entry *mdb) 1270 { 1271 return false; 1272 } 1273 1274 static inline void br_mdb_init(void) 1275 { 1276 } 1277 1278 static inline void br_mdb_uninit(void) 1279 { 1280 } 1281 1282 static inline int br_mdb_hash_init(struct net_bridge *br) 1283 { 1284 return 0; 1285 } 1286 1287 static inline void br_mdb_hash_fini(struct net_bridge *br) 1288 { 1289 } 1290 1291 static inline void br_multicast_count(struct net_bridge *br, 1292 const struct net_bridge_port *p, 1293 const struct sk_buff *skb, 1294 u8 type, u8 dir) 1295 { 1296 } 1297 1298 static inline int br_multicast_init_stats(struct net_bridge *br) 1299 { 1300 return 0; 1301 } 1302 1303 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1304 { 1305 } 1306 1307 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1308 { 1309 return 0; 1310 } 1311 1312 static inline void br_multicast_ctx_init(struct net_bridge *br, 1313 struct net_bridge_vlan *vlan, 1314 struct net_bridge_mcast *brmctx) 1315 { 1316 } 1317 1318 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1319 { 1320 } 1321 1322 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1323 struct net_bridge_vlan *vlan, 1324 struct net_bridge_mcast_port *pmctx) 1325 { 1326 } 1327 1328 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1329 { 1330 } 1331 1332 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1333 bool on) 1334 { 1335 } 1336 1337 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1338 bool on) 1339 { 1340 } 1341 1342 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1343 bool on, 1344 struct netlink_ext_ack *extack) 1345 { 1346 return -EOPNOTSUPP; 1347 } 1348 1349 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1350 bool on) 1351 { 1352 return false; 1353 } 1354 1355 static inline int br_mdb_replay(struct net_device *br_dev, 1356 struct net_device *dev, const void *ctx, 1357 bool adding, struct notifier_block *nb, 1358 struct netlink_ext_ack *extack) 1359 { 1360 return -EOPNOTSUPP; 1361 } 1362 1363 static inline bool 1364 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1365 const struct net_bridge_mcast *brmctx2) 1366 { 1367 return true; 1368 } 1369 #endif 1370 1371 /* br_vlan.c */ 1372 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1373 bool br_allowed_ingress(const struct net_bridge *br, 1374 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1375 u16 *vid, u8 *state, 1376 struct net_bridge_vlan **vlan); 1377 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1378 const struct sk_buff *skb); 1379 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1380 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1381 const struct net_bridge_port *port, 1382 struct net_bridge_vlan_group *vg, 1383 struct sk_buff *skb); 1384 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1385 bool *changed, struct netlink_ext_ack *extack); 1386 int br_vlan_delete(struct net_bridge *br, u16 vid); 1387 void br_vlan_flush(struct net_bridge *br); 1388 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1389 void br_recalculate_fwd_mask(struct net_bridge *br); 1390 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1391 struct netlink_ext_ack *extack); 1392 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1393 struct netlink_ext_ack *extack); 1394 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1395 struct netlink_ext_ack *extack); 1396 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1397 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1398 int br_vlan_init(struct net_bridge *br); 1399 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1400 struct netlink_ext_ack *extack); 1401 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1402 struct netlink_ext_ack *extack); 1403 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1404 bool *changed, struct netlink_ext_ack *extack); 1405 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1406 void nbp_vlan_flush(struct net_bridge_port *port); 1407 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1408 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1409 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1410 struct pcpu_sw_netstats *stats); 1411 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1412 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1413 void *ptr); 1414 void br_vlan_rtnl_init(void); 1415 void br_vlan_rtnl_uninit(void); 1416 void br_vlan_notify(const struct net_bridge *br, 1417 const struct net_bridge_port *p, 1418 u16 vid, u16 vid_range, 1419 int cmd); 1420 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1421 const void *ctx, bool adding, struct notifier_block *nb, 1422 struct netlink_ext_ack *extack); 1423 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1424 const struct net_bridge_vlan *range_end); 1425 1426 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1427 struct net_device_path_ctx *ctx, 1428 struct net_device_path *path); 1429 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1430 struct net_bridge_port *dst, 1431 struct net_device_path *path); 1432 1433 static inline struct net_bridge_vlan_group *br_vlan_group( 1434 const struct net_bridge *br) 1435 { 1436 return rtnl_dereference(br->vlgrp); 1437 } 1438 1439 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1440 const struct net_bridge_port *p) 1441 { 1442 return rtnl_dereference(p->vlgrp); 1443 } 1444 1445 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1446 const struct net_bridge *br) 1447 { 1448 return rcu_dereference(br->vlgrp); 1449 } 1450 1451 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1452 const struct net_bridge_port *p) 1453 { 1454 return rcu_dereference(p->vlgrp); 1455 } 1456 1457 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1458 * skb, the vlan tag will always be present if the frame was tagged. 1459 */ 1460 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1461 { 1462 int err = 0; 1463 1464 if (skb_vlan_tag_present(skb)) { 1465 *vid = skb_vlan_tag_get_id(skb); 1466 } else { 1467 *vid = 0; 1468 err = -EINVAL; 1469 } 1470 1471 return err; 1472 } 1473 1474 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1475 { 1476 if (!vg) 1477 return 0; 1478 1479 smp_rmb(); 1480 return vg->pvid; 1481 } 1482 1483 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1484 { 1485 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1486 } 1487 #else 1488 static inline bool br_allowed_ingress(const struct net_bridge *br, 1489 struct net_bridge_vlan_group *vg, 1490 struct sk_buff *skb, 1491 u16 *vid, u8 *state, 1492 struct net_bridge_vlan **vlan) 1493 1494 { 1495 *vlan = NULL; 1496 return true; 1497 } 1498 1499 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1500 const struct sk_buff *skb) 1501 { 1502 return true; 1503 } 1504 1505 static inline bool br_should_learn(struct net_bridge_port *p, 1506 struct sk_buff *skb, u16 *vid) 1507 { 1508 return true; 1509 } 1510 1511 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1512 const struct net_bridge_port *port, 1513 struct net_bridge_vlan_group *vg, 1514 struct sk_buff *skb) 1515 { 1516 return skb; 1517 } 1518 1519 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1520 bool *changed, struct netlink_ext_ack *extack) 1521 { 1522 *changed = false; 1523 return -EOPNOTSUPP; 1524 } 1525 1526 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1527 { 1528 return -EOPNOTSUPP; 1529 } 1530 1531 static inline void br_vlan_flush(struct net_bridge *br) 1532 { 1533 } 1534 1535 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1536 { 1537 } 1538 1539 static inline int br_vlan_init(struct net_bridge *br) 1540 { 1541 return 0; 1542 } 1543 1544 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1545 bool *changed, struct netlink_ext_ack *extack) 1546 { 1547 *changed = false; 1548 return -EOPNOTSUPP; 1549 } 1550 1551 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1552 { 1553 return -EOPNOTSUPP; 1554 } 1555 1556 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1557 { 1558 } 1559 1560 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1561 u16 vid) 1562 { 1563 return NULL; 1564 } 1565 1566 static inline int nbp_vlan_init(struct net_bridge_port *port, 1567 struct netlink_ext_ack *extack) 1568 { 1569 return 0; 1570 } 1571 1572 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1573 { 1574 return 0; 1575 } 1576 1577 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1578 { 1579 return 0; 1580 } 1581 1582 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1583 unsigned long val, 1584 struct netlink_ext_ack *extack) 1585 { 1586 return -EOPNOTSUPP; 1587 } 1588 1589 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1590 u32 filter_mask) 1591 { 1592 return 0; 1593 } 1594 1595 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1596 struct net_device_path_ctx *ctx, 1597 struct net_device_path *path) 1598 { 1599 } 1600 1601 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1602 struct net_bridge_port *dst, 1603 struct net_device_path *path) 1604 { 1605 return 0; 1606 } 1607 1608 static inline struct net_bridge_vlan_group *br_vlan_group( 1609 const struct net_bridge *br) 1610 { 1611 return NULL; 1612 } 1613 1614 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1615 const struct net_bridge_port *p) 1616 { 1617 return NULL; 1618 } 1619 1620 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1621 const struct net_bridge *br) 1622 { 1623 return NULL; 1624 } 1625 1626 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1627 const struct net_bridge_port *p) 1628 { 1629 return NULL; 1630 } 1631 1632 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1633 struct pcpu_sw_netstats *stats) 1634 { 1635 } 1636 1637 static inline void br_vlan_port_event(struct net_bridge_port *p, 1638 unsigned long event) 1639 { 1640 } 1641 1642 static inline int br_vlan_bridge_event(struct net_device *dev, 1643 unsigned long event, void *ptr) 1644 { 1645 return 0; 1646 } 1647 1648 static inline void br_vlan_rtnl_init(void) 1649 { 1650 } 1651 1652 static inline void br_vlan_rtnl_uninit(void) 1653 { 1654 } 1655 1656 static inline void br_vlan_notify(const struct net_bridge *br, 1657 const struct net_bridge_port *p, 1658 u16 vid, u16 vid_range, 1659 int cmd) 1660 { 1661 } 1662 1663 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1664 const struct net_bridge_vlan *range_end) 1665 { 1666 return true; 1667 } 1668 1669 static inline int br_vlan_replay(struct net_device *br_dev, 1670 struct net_device *dev, const void *ctx, 1671 bool adding, struct notifier_block *nb, 1672 struct netlink_ext_ack *extack) 1673 { 1674 return -EOPNOTSUPP; 1675 } 1676 #endif 1677 1678 /* br_vlan_options.c */ 1679 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1680 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1681 const struct net_bridge_vlan *range_end); 1682 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1683 size_t br_vlan_opts_nl_size(void); 1684 int br_vlan_process_options(const struct net_bridge *br, 1685 const struct net_bridge_port *p, 1686 struct net_bridge_vlan *range_start, 1687 struct net_bridge_vlan *range_end, 1688 struct nlattr **tb, 1689 struct netlink_ext_ack *extack); 1690 int br_vlan_rtm_process_global_options(struct net_device *dev, 1691 const struct nlattr *attr, 1692 int cmd, 1693 struct netlink_ext_ack *extack); 1694 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1695 const struct net_bridge_vlan *r_end); 1696 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1697 const struct net_bridge_vlan *v_opts); 1698 1699 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1700 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1701 { 1702 return READ_ONCE(v->state); 1703 } 1704 1705 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1706 { 1707 WRITE_ONCE(v->state, state); 1708 } 1709 1710 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1711 { 1712 return READ_ONCE(vg->pvid_state); 1713 } 1714 1715 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1716 u8 state) 1717 { 1718 WRITE_ONCE(vg->pvid_state, state); 1719 } 1720 1721 /* learn_allow is true at ingress and false at egress */ 1722 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1723 { 1724 switch (state) { 1725 case BR_STATE_LEARNING: 1726 return learn_allow; 1727 case BR_STATE_FORWARDING: 1728 return true; 1729 default: 1730 return false; 1731 } 1732 } 1733 #endif 1734 1735 struct nf_br_ops { 1736 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1737 }; 1738 extern const struct nf_br_ops __rcu *nf_br_ops; 1739 1740 /* br_netfilter.c */ 1741 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1742 int br_nf_core_init(void); 1743 void br_nf_core_fini(void); 1744 void br_netfilter_rtable_init(struct net_bridge *); 1745 #else 1746 static inline int br_nf_core_init(void) { return 0; } 1747 static inline void br_nf_core_fini(void) {} 1748 #define br_netfilter_rtable_init(x) 1749 #endif 1750 1751 /* br_stp.c */ 1752 void br_set_state(struct net_bridge_port *p, unsigned int state); 1753 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1754 void br_init_port(struct net_bridge_port *p); 1755 void br_become_designated_port(struct net_bridge_port *p); 1756 1757 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1758 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1759 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1760 int br_set_max_age(struct net_bridge *br, unsigned long x); 1761 int __set_ageing_time(struct net_device *dev, unsigned long t); 1762 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1763 1764 1765 /* br_stp_if.c */ 1766 void br_stp_enable_bridge(struct net_bridge *br); 1767 void br_stp_disable_bridge(struct net_bridge *br); 1768 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1769 struct netlink_ext_ack *extack); 1770 void br_stp_enable_port(struct net_bridge_port *p); 1771 void br_stp_disable_port(struct net_bridge_port *p); 1772 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1773 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1774 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1775 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1776 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1777 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1778 1779 /* br_stp_bpdu.c */ 1780 struct stp_proto; 1781 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1782 struct net_device *dev); 1783 1784 /* br_stp_timer.c */ 1785 void br_stp_timer_init(struct net_bridge *br); 1786 void br_stp_port_timer_init(struct net_bridge_port *p); 1787 unsigned long br_timer_value(const struct timer_list *timer); 1788 1789 /* br.c */ 1790 #if IS_ENABLED(CONFIG_ATM_LANE) 1791 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1792 #endif 1793 1794 /* br_mrp.c */ 1795 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1796 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1797 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1798 bool br_mrp_enabled(struct net_bridge *br); 1799 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1800 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1801 #else 1802 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1803 struct nlattr *attr, int cmd, 1804 struct netlink_ext_ack *extack) 1805 { 1806 return -EOPNOTSUPP; 1807 } 1808 1809 static inline bool br_mrp_enabled(struct net_bridge *br) 1810 { 1811 return false; 1812 } 1813 1814 static inline void br_mrp_port_del(struct net_bridge *br, 1815 struct net_bridge_port *p) 1816 { 1817 } 1818 1819 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1820 { 1821 return 0; 1822 } 1823 1824 #endif 1825 1826 /* br_cfm.c */ 1827 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1828 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1829 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1830 bool br_cfm_created(struct net_bridge *br); 1831 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1832 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1833 int br_cfm_status_fill_info(struct sk_buff *skb, 1834 struct net_bridge *br, 1835 bool getlink); 1836 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1837 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1838 #else 1839 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1840 struct nlattr *attr, int cmd, 1841 struct netlink_ext_ack *extack) 1842 { 1843 return -EOPNOTSUPP; 1844 } 1845 1846 static inline bool br_cfm_created(struct net_bridge *br) 1847 { 1848 return false; 1849 } 1850 1851 static inline void br_cfm_port_del(struct net_bridge *br, 1852 struct net_bridge_port *p) 1853 { 1854 } 1855 1856 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1857 { 1858 return -EOPNOTSUPP; 1859 } 1860 1861 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1862 struct net_bridge *br, 1863 bool getlink) 1864 { 1865 return -EOPNOTSUPP; 1866 } 1867 1868 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1869 { 1870 return -EOPNOTSUPP; 1871 } 1872 1873 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1874 { 1875 return -EOPNOTSUPP; 1876 } 1877 #endif 1878 1879 /* br_netlink.c */ 1880 extern struct rtnl_link_ops br_link_ops; 1881 int br_netlink_init(void); 1882 void br_netlink_fini(void); 1883 void br_ifinfo_notify(int event, const struct net_bridge *br, 1884 const struct net_bridge_port *port); 1885 void br_info_notify(int event, const struct net_bridge *br, 1886 const struct net_bridge_port *port, u32 filter); 1887 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1888 struct netlink_ext_ack *extack); 1889 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1890 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1891 u32 filter_mask, int nlflags); 1892 int br_process_vlan_info(struct net_bridge *br, 1893 struct net_bridge_port *p, int cmd, 1894 struct bridge_vlan_info *vinfo_curr, 1895 struct bridge_vlan_info **vinfo_last, 1896 bool *changed, 1897 struct netlink_ext_ack *extack); 1898 1899 #ifdef CONFIG_SYSFS 1900 /* br_sysfs_if.c */ 1901 extern const struct sysfs_ops brport_sysfs_ops; 1902 int br_sysfs_addif(struct net_bridge_port *p); 1903 int br_sysfs_renameif(struct net_bridge_port *p); 1904 1905 /* br_sysfs_br.c */ 1906 int br_sysfs_addbr(struct net_device *dev); 1907 void br_sysfs_delbr(struct net_device *dev); 1908 1909 #else 1910 1911 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1912 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1913 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1914 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1915 #endif /* CONFIG_SYSFS */ 1916 1917 /* br_switchdev.c */ 1918 #ifdef CONFIG_NET_SWITCHDEV 1919 int br_switchdev_port_offload(struct net_bridge_port *p, 1920 struct net_device *dev, const void *ctx, 1921 struct notifier_block *atomic_nb, 1922 struct notifier_block *blocking_nb, 1923 bool tx_fwd_offload, 1924 struct netlink_ext_ack *extack); 1925 1926 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1927 struct notifier_block *atomic_nb, 1928 struct notifier_block *blocking_nb); 1929 1930 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1931 1932 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1933 1934 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1935 struct sk_buff *skb); 1936 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1937 struct sk_buff *skb); 1938 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1939 struct sk_buff *skb); 1940 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1941 const struct sk_buff *skb); 1942 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1943 unsigned long flags, 1944 unsigned long mask, 1945 struct netlink_ext_ack *extack); 1946 void br_switchdev_fdb_notify(struct net_bridge *br, 1947 const struct net_bridge_fdb_entry *fdb, int type); 1948 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1949 struct netlink_ext_ack *extack); 1950 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1951 void br_switchdev_init(struct net_bridge *br); 1952 1953 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1954 { 1955 skb->offload_fwd_mark = 0; 1956 } 1957 #else 1958 static inline int 1959 br_switchdev_port_offload(struct net_bridge_port *p, 1960 struct net_device *dev, const void *ctx, 1961 struct notifier_block *atomic_nb, 1962 struct notifier_block *blocking_nb, 1963 bool tx_fwd_offload, 1964 struct netlink_ext_ack *extack) 1965 { 1966 return -EOPNOTSUPP; 1967 } 1968 1969 static inline void 1970 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1971 struct notifier_block *atomic_nb, 1972 struct notifier_block *blocking_nb) 1973 { 1974 } 1975 1976 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 1977 { 1978 return false; 1979 } 1980 1981 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 1982 { 1983 } 1984 1985 static inline void 1986 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1987 struct sk_buff *skb) 1988 { 1989 } 1990 1991 static inline void 1992 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1993 struct sk_buff *skb) 1994 { 1995 } 1996 1997 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1998 struct sk_buff *skb) 1999 { 2000 } 2001 2002 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2003 const struct sk_buff *skb) 2004 { 2005 return true; 2006 } 2007 2008 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2009 unsigned long flags, 2010 unsigned long mask, 2011 struct netlink_ext_ack *extack) 2012 { 2013 return 0; 2014 } 2015 2016 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2017 u16 vid, u16 flags, 2018 struct netlink_ext_ack *extack) 2019 { 2020 return -EOPNOTSUPP; 2021 } 2022 2023 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2024 { 2025 return -EOPNOTSUPP; 2026 } 2027 2028 static inline void 2029 br_switchdev_fdb_notify(struct net_bridge *br, 2030 const struct net_bridge_fdb_entry *fdb, int type) 2031 { 2032 } 2033 2034 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2035 { 2036 } 2037 2038 static inline void br_switchdev_init(struct net_bridge *br) 2039 { 2040 } 2041 2042 #endif /* CONFIG_NET_SWITCHDEV */ 2043 2044 /* br_arp_nd_proxy.c */ 2045 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2046 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2047 u16 vid, struct net_bridge_port *p); 2048 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2049 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2050 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2051 #endif 2052