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_querier; 122 u8 multicast_igmp_version; 123 u8 multicast_router; 124 #if IS_ENABLED(CONFIG_IPV6) 125 u8 multicast_mld_version; 126 #endif 127 unsigned long multicast_last_member_interval; 128 unsigned long multicast_membership_interval; 129 unsigned long multicast_querier_interval; 130 unsigned long multicast_query_interval; 131 unsigned long multicast_query_response_interval; 132 unsigned long multicast_startup_query_interval; 133 struct hlist_head ip4_mc_router_list; 134 struct timer_list ip4_mc_router_timer; 135 struct bridge_mcast_other_query ip4_other_query; 136 struct bridge_mcast_own_query ip4_own_query; 137 struct bridge_mcast_querier ip4_querier; 138 #if IS_ENABLED(CONFIG_IPV6) 139 struct hlist_head ip6_mc_router_list; 140 struct timer_list ip6_mc_router_timer; 141 struct bridge_mcast_other_query ip6_other_query; 142 struct bridge_mcast_own_query ip6_own_query; 143 struct bridge_mcast_querier ip6_querier; 144 #endif /* IS_ENABLED(CONFIG_IPV6) */ 145 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 146 }; 147 148 struct br_tunnel_info { 149 __be64 tunnel_id; 150 struct metadata_dst __rcu *tunnel_dst; 151 }; 152 153 /* private vlan flags */ 154 enum { 155 BR_VLFLAG_PER_PORT_STATS = BIT(0), 156 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 157 BR_VLFLAG_MCAST_ENABLED = BIT(2), 158 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 159 }; 160 161 /** 162 * struct net_bridge_vlan - per-vlan entry 163 * 164 * @vnode: rhashtable member 165 * @vid: VLAN id 166 * @flags: bridge vlan flags 167 * @priv_flags: private (in-kernel) bridge vlan flags 168 * @state: STP state (e.g. blocking, learning, forwarding) 169 * @stats: per-cpu VLAN statistics 170 * @br: if MASTER flag set, this points to a bridge struct 171 * @port: if MASTER flag unset, this points to a port struct 172 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 173 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 174 * for this VLAN entry 175 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 176 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 177 * context 178 * @vlist: sorted list of VLAN entries 179 * @rcu: used for entry destruction 180 * 181 * This structure is shared between the global per-VLAN entries contained in 182 * the bridge rhashtable and the local per-port per-VLAN entries contained in 183 * the port's rhashtable. The union entries should be interpreted depending on 184 * the entry flags that are set. 185 */ 186 struct net_bridge_vlan { 187 struct rhash_head vnode; 188 struct rhash_head tnode; 189 u16 vid; 190 u16 flags; 191 u16 priv_flags; 192 u8 state; 193 struct pcpu_sw_netstats __percpu *stats; 194 union { 195 struct net_bridge *br; 196 struct net_bridge_port *port; 197 }; 198 union { 199 refcount_t refcnt; 200 struct net_bridge_vlan *brvlan; 201 }; 202 203 struct br_tunnel_info tinfo; 204 205 union { 206 struct net_bridge_mcast br_mcast_ctx; 207 struct net_bridge_mcast_port port_mcast_ctx; 208 }; 209 210 struct list_head vlist; 211 212 struct rcu_head rcu; 213 }; 214 215 /** 216 * struct net_bridge_vlan_group 217 * 218 * @vlan_hash: VLAN entry rhashtable 219 * @vlan_list: sorted VLAN entry list 220 * @num_vlans: number of total VLAN entries 221 * @pvid: PVID VLAN id 222 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 223 * 224 * IMPORTANT: Be careful when checking if there're VLAN entries using list 225 * primitives because the bridge can have entries in its list which 226 * are just for global context but not for filtering, i.e. they have 227 * the master flag set but not the brentry flag. If you have to check 228 * if there're "real" entries in the bridge please test @num_vlans 229 */ 230 struct net_bridge_vlan_group { 231 struct rhashtable vlan_hash; 232 struct rhashtable tunnel_hash; 233 struct list_head vlan_list; 234 u16 num_vlans; 235 u16 pvid; 236 u8 pvid_state; 237 }; 238 239 /* bridge fdb flags */ 240 enum { 241 BR_FDB_LOCAL, 242 BR_FDB_STATIC, 243 BR_FDB_STICKY, 244 BR_FDB_ADDED_BY_USER, 245 BR_FDB_ADDED_BY_EXT_LEARN, 246 BR_FDB_OFFLOADED, 247 BR_FDB_NOTIFY, 248 BR_FDB_NOTIFY_INACTIVE 249 }; 250 251 struct net_bridge_fdb_key { 252 mac_addr addr; 253 u16 vlan_id; 254 }; 255 256 struct net_bridge_fdb_entry { 257 struct rhash_head rhnode; 258 struct net_bridge_port *dst; 259 260 struct net_bridge_fdb_key key; 261 struct hlist_node fdb_node; 262 unsigned long flags; 263 264 /* write-heavy members should not affect lookups */ 265 unsigned long updated ____cacheline_aligned_in_smp; 266 unsigned long used; 267 268 struct rcu_head rcu; 269 }; 270 271 #define MDB_PG_FLAGS_PERMANENT BIT(0) 272 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 273 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 274 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 275 #define MDB_PG_FLAGS_BLOCKED BIT(4) 276 277 #define PG_SRC_ENT_LIMIT 32 278 279 #define BR_SGRP_F_DELETE BIT(0) 280 #define BR_SGRP_F_SEND BIT(1) 281 #define BR_SGRP_F_INSTALLED BIT(2) 282 283 struct net_bridge_mcast_gc { 284 struct hlist_node gc_node; 285 void (*destroy)(struct net_bridge_mcast_gc *gc); 286 }; 287 288 struct net_bridge_group_src { 289 struct hlist_node node; 290 291 struct br_ip addr; 292 struct net_bridge_port_group *pg; 293 u8 flags; 294 u8 src_query_rexmit_cnt; 295 struct timer_list timer; 296 297 struct net_bridge *br; 298 struct net_bridge_mcast_gc mcast_gc; 299 struct rcu_head rcu; 300 }; 301 302 struct net_bridge_port_group_sg_key { 303 struct net_bridge_port *port; 304 struct br_ip addr; 305 }; 306 307 struct net_bridge_port_group { 308 struct net_bridge_port_group __rcu *next; 309 struct net_bridge_port_group_sg_key key; 310 unsigned char eth_addr[ETH_ALEN] __aligned(2); 311 unsigned char flags; 312 unsigned char filter_mode; 313 unsigned char grp_query_rexmit_cnt; 314 unsigned char rt_protocol; 315 316 struct hlist_head src_list; 317 unsigned int src_ents; 318 struct timer_list timer; 319 struct timer_list rexmit_timer; 320 struct hlist_node mglist; 321 struct rb_root eht_set_tree; 322 struct rb_root eht_host_tree; 323 324 struct rhash_head rhnode; 325 struct net_bridge_mcast_gc mcast_gc; 326 struct rcu_head rcu; 327 }; 328 329 struct net_bridge_mdb_entry { 330 struct rhash_head rhnode; 331 struct net_bridge *br; 332 struct net_bridge_port_group __rcu *ports; 333 struct br_ip addr; 334 bool host_joined; 335 336 struct timer_list timer; 337 struct hlist_node mdb_node; 338 339 struct net_bridge_mcast_gc mcast_gc; 340 struct rcu_head rcu; 341 }; 342 343 struct net_bridge_port { 344 struct net_bridge *br; 345 struct net_device *dev; 346 struct list_head list; 347 348 unsigned long flags; 349 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 350 struct net_bridge_vlan_group __rcu *vlgrp; 351 #endif 352 struct net_bridge_port __rcu *backup_port; 353 354 /* STP */ 355 u8 priority; 356 u8 state; 357 u16 port_no; 358 unsigned char topology_change_ack; 359 unsigned char config_pending; 360 port_id port_id; 361 port_id designated_port; 362 bridge_id designated_root; 363 bridge_id designated_bridge; 364 u32 path_cost; 365 u32 designated_cost; 366 unsigned long designated_age; 367 368 struct timer_list forward_delay_timer; 369 struct timer_list hold_timer; 370 struct timer_list message_age_timer; 371 struct kobject kobj; 372 struct rcu_head rcu; 373 374 struct net_bridge_mcast_port multicast_ctx; 375 376 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 377 struct bridge_mcast_stats __percpu *mcast_stats; 378 379 u32 multicast_eht_hosts_limit; 380 u32 multicast_eht_hosts_cnt; 381 struct hlist_head mglist; 382 #endif 383 384 #ifdef CONFIG_SYSFS 385 char sysfs_name[IFNAMSIZ]; 386 #endif 387 388 #ifdef CONFIG_NET_POLL_CONTROLLER 389 struct netpoll *np; 390 #endif 391 #ifdef CONFIG_NET_SWITCHDEV 392 /* Identifier used to group ports that share the same switchdev 393 * hardware domain. 394 */ 395 int hwdom; 396 int offload_count; 397 struct netdev_phys_item_id ppid; 398 #endif 399 u16 group_fwd_mask; 400 u16 backup_redirected_cnt; 401 402 struct bridge_stp_xstats stp_xstats; 403 }; 404 405 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 406 407 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 408 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 409 410 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 411 { 412 return rcu_dereference(dev->rx_handler_data); 413 } 414 415 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 416 { 417 return netif_is_bridge_port(dev) ? 418 rtnl_dereference(dev->rx_handler_data) : NULL; 419 } 420 421 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 422 { 423 return netif_is_bridge_port(dev) ? 424 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 425 } 426 427 enum net_bridge_opts { 428 BROPT_VLAN_ENABLED, 429 BROPT_VLAN_STATS_ENABLED, 430 BROPT_NF_CALL_IPTABLES, 431 BROPT_NF_CALL_IP6TABLES, 432 BROPT_NF_CALL_ARPTABLES, 433 BROPT_GROUP_ADDR_SET, 434 BROPT_MULTICAST_ENABLED, 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_mcast *brmctx, 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 (brmctx->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 brmctx1->multicast_startup_query_interval == 1192 brmctx2->multicast_startup_query_interval && 1193 brmctx1->multicast_querier == brmctx2->multicast_querier && 1194 #if IS_ENABLED(CONFIG_IPV6) 1195 brmctx1->multicast_mld_version == 1196 brmctx2->multicast_mld_version && 1197 #endif 1198 true; 1199 } 1200 1201 static inline bool 1202 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1203 { 1204 bool vlan_snooping_enabled; 1205 1206 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1207 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1208 1209 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1210 } 1211 #else 1212 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1213 struct net_bridge_mcast_port **pmctx, 1214 struct net_bridge_vlan *vlan, 1215 struct sk_buff *skb, 1216 u16 vid) 1217 { 1218 return 0; 1219 } 1220 1221 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1222 struct sk_buff *skb, u16 vid) 1223 { 1224 return NULL; 1225 } 1226 1227 static inline int br_multicast_add_port(struct net_bridge_port *port) 1228 { 1229 return 0; 1230 } 1231 1232 static inline void br_multicast_del_port(struct net_bridge_port *port) 1233 { 1234 } 1235 1236 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1237 { 1238 } 1239 1240 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1241 { 1242 } 1243 1244 static inline void br_multicast_init(struct net_bridge *br) 1245 { 1246 } 1247 1248 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1249 { 1250 } 1251 1252 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1253 { 1254 } 1255 1256 static inline void br_multicast_open(struct net_bridge *br) 1257 { 1258 } 1259 1260 static inline void br_multicast_stop(struct net_bridge *br) 1261 { 1262 } 1263 1264 static inline void br_multicast_dev_del(struct net_bridge *br) 1265 { 1266 } 1267 1268 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1269 struct sk_buff *skb, 1270 struct net_bridge_mcast *brmctx, 1271 bool local_rcv, bool local_orig) 1272 { 1273 } 1274 1275 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1276 struct sk_buff *skb) 1277 { 1278 return false; 1279 } 1280 1281 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1282 struct ethhdr *eth, 1283 const struct net_bridge_mdb_entry *mdb) 1284 { 1285 return false; 1286 } 1287 1288 static inline void br_mdb_init(void) 1289 { 1290 } 1291 1292 static inline void br_mdb_uninit(void) 1293 { 1294 } 1295 1296 static inline int br_mdb_hash_init(struct net_bridge *br) 1297 { 1298 return 0; 1299 } 1300 1301 static inline void br_mdb_hash_fini(struct net_bridge *br) 1302 { 1303 } 1304 1305 static inline void br_multicast_count(struct net_bridge *br, 1306 const struct net_bridge_port *p, 1307 const struct sk_buff *skb, 1308 u8 type, u8 dir) 1309 { 1310 } 1311 1312 static inline int br_multicast_init_stats(struct net_bridge *br) 1313 { 1314 return 0; 1315 } 1316 1317 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1318 { 1319 } 1320 1321 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1322 { 1323 return 0; 1324 } 1325 1326 static inline void br_multicast_ctx_init(struct net_bridge *br, 1327 struct net_bridge_vlan *vlan, 1328 struct net_bridge_mcast *brmctx) 1329 { 1330 } 1331 1332 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1333 { 1334 } 1335 1336 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1337 struct net_bridge_vlan *vlan, 1338 struct net_bridge_mcast_port *pmctx) 1339 { 1340 } 1341 1342 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1343 { 1344 } 1345 1346 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1347 bool on) 1348 { 1349 } 1350 1351 static inline void br_multicast_toggle_vlan(struct net_bridge_vlan *vlan, 1352 bool on) 1353 { 1354 } 1355 1356 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1357 bool on, 1358 struct netlink_ext_ack *extack) 1359 { 1360 return -EOPNOTSUPP; 1361 } 1362 1363 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1364 bool on) 1365 { 1366 return false; 1367 } 1368 1369 static inline int br_mdb_replay(struct net_device *br_dev, 1370 struct net_device *dev, const void *ctx, 1371 bool adding, struct notifier_block *nb, 1372 struct netlink_ext_ack *extack) 1373 { 1374 return -EOPNOTSUPP; 1375 } 1376 1377 static inline bool 1378 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1379 const struct net_bridge_mcast *brmctx2) 1380 { 1381 return true; 1382 } 1383 #endif 1384 1385 /* br_vlan.c */ 1386 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1387 bool br_allowed_ingress(const struct net_bridge *br, 1388 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1389 u16 *vid, u8 *state, 1390 struct net_bridge_vlan **vlan); 1391 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1392 const struct sk_buff *skb); 1393 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1394 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1395 const struct net_bridge_port *port, 1396 struct net_bridge_vlan_group *vg, 1397 struct sk_buff *skb); 1398 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1399 bool *changed, struct netlink_ext_ack *extack); 1400 int br_vlan_delete(struct net_bridge *br, u16 vid); 1401 void br_vlan_flush(struct net_bridge *br); 1402 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1403 void br_recalculate_fwd_mask(struct net_bridge *br); 1404 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1405 struct netlink_ext_ack *extack); 1406 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1407 struct netlink_ext_ack *extack); 1408 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1409 struct netlink_ext_ack *extack); 1410 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1411 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1412 int br_vlan_init(struct net_bridge *br); 1413 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1414 struct netlink_ext_ack *extack); 1415 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1416 struct netlink_ext_ack *extack); 1417 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1418 bool *changed, struct netlink_ext_ack *extack); 1419 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1420 void nbp_vlan_flush(struct net_bridge_port *port); 1421 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1422 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1423 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1424 struct pcpu_sw_netstats *stats); 1425 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1426 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1427 void *ptr); 1428 void br_vlan_rtnl_init(void); 1429 void br_vlan_rtnl_uninit(void); 1430 void br_vlan_notify(const struct net_bridge *br, 1431 const struct net_bridge_port *p, 1432 u16 vid, u16 vid_range, 1433 int cmd); 1434 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1435 const void *ctx, bool adding, struct notifier_block *nb, 1436 struct netlink_ext_ack *extack); 1437 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1438 const struct net_bridge_vlan *range_end); 1439 1440 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1441 struct net_device_path_ctx *ctx, 1442 struct net_device_path *path); 1443 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1444 struct net_bridge_port *dst, 1445 struct net_device_path *path); 1446 1447 static inline struct net_bridge_vlan_group *br_vlan_group( 1448 const struct net_bridge *br) 1449 { 1450 return rtnl_dereference(br->vlgrp); 1451 } 1452 1453 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1454 const struct net_bridge_port *p) 1455 { 1456 return rtnl_dereference(p->vlgrp); 1457 } 1458 1459 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1460 const struct net_bridge *br) 1461 { 1462 return rcu_dereference(br->vlgrp); 1463 } 1464 1465 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1466 const struct net_bridge_port *p) 1467 { 1468 return rcu_dereference(p->vlgrp); 1469 } 1470 1471 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1472 * skb, the vlan tag will always be present if the frame was tagged. 1473 */ 1474 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1475 { 1476 int err = 0; 1477 1478 if (skb_vlan_tag_present(skb)) { 1479 *vid = skb_vlan_tag_get_id(skb); 1480 } else { 1481 *vid = 0; 1482 err = -EINVAL; 1483 } 1484 1485 return err; 1486 } 1487 1488 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1489 { 1490 if (!vg) 1491 return 0; 1492 1493 smp_rmb(); 1494 return vg->pvid; 1495 } 1496 1497 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1498 { 1499 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1500 } 1501 #else 1502 static inline bool br_allowed_ingress(const struct net_bridge *br, 1503 struct net_bridge_vlan_group *vg, 1504 struct sk_buff *skb, 1505 u16 *vid, u8 *state, 1506 struct net_bridge_vlan **vlan) 1507 1508 { 1509 *vlan = NULL; 1510 return true; 1511 } 1512 1513 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1514 const struct sk_buff *skb) 1515 { 1516 return true; 1517 } 1518 1519 static inline bool br_should_learn(struct net_bridge_port *p, 1520 struct sk_buff *skb, u16 *vid) 1521 { 1522 return true; 1523 } 1524 1525 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1526 const struct net_bridge_port *port, 1527 struct net_bridge_vlan_group *vg, 1528 struct sk_buff *skb) 1529 { 1530 return skb; 1531 } 1532 1533 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1534 bool *changed, struct netlink_ext_ack *extack) 1535 { 1536 *changed = false; 1537 return -EOPNOTSUPP; 1538 } 1539 1540 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1541 { 1542 return -EOPNOTSUPP; 1543 } 1544 1545 static inline void br_vlan_flush(struct net_bridge *br) 1546 { 1547 } 1548 1549 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1550 { 1551 } 1552 1553 static inline int br_vlan_init(struct net_bridge *br) 1554 { 1555 return 0; 1556 } 1557 1558 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1559 bool *changed, struct netlink_ext_ack *extack) 1560 { 1561 *changed = false; 1562 return -EOPNOTSUPP; 1563 } 1564 1565 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1566 { 1567 return -EOPNOTSUPP; 1568 } 1569 1570 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1571 { 1572 } 1573 1574 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1575 u16 vid) 1576 { 1577 return NULL; 1578 } 1579 1580 static inline int nbp_vlan_init(struct net_bridge_port *port, 1581 struct netlink_ext_ack *extack) 1582 { 1583 return 0; 1584 } 1585 1586 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1587 { 1588 return 0; 1589 } 1590 1591 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1592 { 1593 return 0; 1594 } 1595 1596 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1597 unsigned long val, 1598 struct netlink_ext_ack *extack) 1599 { 1600 return -EOPNOTSUPP; 1601 } 1602 1603 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1604 u32 filter_mask) 1605 { 1606 return 0; 1607 } 1608 1609 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1610 struct net_device_path_ctx *ctx, 1611 struct net_device_path *path) 1612 { 1613 } 1614 1615 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1616 struct net_bridge_port *dst, 1617 struct net_device_path *path) 1618 { 1619 return 0; 1620 } 1621 1622 static inline struct net_bridge_vlan_group *br_vlan_group( 1623 const struct net_bridge *br) 1624 { 1625 return NULL; 1626 } 1627 1628 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1629 const struct net_bridge_port *p) 1630 { 1631 return NULL; 1632 } 1633 1634 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1635 const struct net_bridge *br) 1636 { 1637 return NULL; 1638 } 1639 1640 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1641 const struct net_bridge_port *p) 1642 { 1643 return NULL; 1644 } 1645 1646 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1647 struct pcpu_sw_netstats *stats) 1648 { 1649 } 1650 1651 static inline void br_vlan_port_event(struct net_bridge_port *p, 1652 unsigned long event) 1653 { 1654 } 1655 1656 static inline int br_vlan_bridge_event(struct net_device *dev, 1657 unsigned long event, void *ptr) 1658 { 1659 return 0; 1660 } 1661 1662 static inline void br_vlan_rtnl_init(void) 1663 { 1664 } 1665 1666 static inline void br_vlan_rtnl_uninit(void) 1667 { 1668 } 1669 1670 static inline void br_vlan_notify(const struct net_bridge *br, 1671 const struct net_bridge_port *p, 1672 u16 vid, u16 vid_range, 1673 int cmd) 1674 { 1675 } 1676 1677 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1678 const struct net_bridge_vlan *range_end) 1679 { 1680 return true; 1681 } 1682 1683 static inline int br_vlan_replay(struct net_device *br_dev, 1684 struct net_device *dev, const void *ctx, 1685 bool adding, struct notifier_block *nb, 1686 struct netlink_ext_ack *extack) 1687 { 1688 return -EOPNOTSUPP; 1689 } 1690 #endif 1691 1692 /* br_vlan_options.c */ 1693 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1694 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1695 const struct net_bridge_vlan *range_end); 1696 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1697 size_t br_vlan_opts_nl_size(void); 1698 int br_vlan_process_options(const struct net_bridge *br, 1699 const struct net_bridge_port *p, 1700 struct net_bridge_vlan *range_start, 1701 struct net_bridge_vlan *range_end, 1702 struct nlattr **tb, 1703 struct netlink_ext_ack *extack); 1704 int br_vlan_rtm_process_global_options(struct net_device *dev, 1705 const struct nlattr *attr, 1706 int cmd, 1707 struct netlink_ext_ack *extack); 1708 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1709 const struct net_bridge_vlan *r_end); 1710 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1711 const struct net_bridge_vlan *v_opts); 1712 1713 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1714 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1715 { 1716 return READ_ONCE(v->state); 1717 } 1718 1719 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1720 { 1721 WRITE_ONCE(v->state, state); 1722 } 1723 1724 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1725 { 1726 return READ_ONCE(vg->pvid_state); 1727 } 1728 1729 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1730 u8 state) 1731 { 1732 WRITE_ONCE(vg->pvid_state, state); 1733 } 1734 1735 /* learn_allow is true at ingress and false at egress */ 1736 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1737 { 1738 switch (state) { 1739 case BR_STATE_LEARNING: 1740 return learn_allow; 1741 case BR_STATE_FORWARDING: 1742 return true; 1743 default: 1744 return false; 1745 } 1746 } 1747 #endif 1748 1749 struct nf_br_ops { 1750 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1751 }; 1752 extern const struct nf_br_ops __rcu *nf_br_ops; 1753 1754 /* br_netfilter.c */ 1755 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1756 int br_nf_core_init(void); 1757 void br_nf_core_fini(void); 1758 void br_netfilter_rtable_init(struct net_bridge *); 1759 #else 1760 static inline int br_nf_core_init(void) { return 0; } 1761 static inline void br_nf_core_fini(void) {} 1762 #define br_netfilter_rtable_init(x) 1763 #endif 1764 1765 /* br_stp.c */ 1766 void br_set_state(struct net_bridge_port *p, unsigned int state); 1767 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1768 void br_init_port(struct net_bridge_port *p); 1769 void br_become_designated_port(struct net_bridge_port *p); 1770 1771 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1772 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1773 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1774 int br_set_max_age(struct net_bridge *br, unsigned long x); 1775 int __set_ageing_time(struct net_device *dev, unsigned long t); 1776 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1777 1778 1779 /* br_stp_if.c */ 1780 void br_stp_enable_bridge(struct net_bridge *br); 1781 void br_stp_disable_bridge(struct net_bridge *br); 1782 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1783 struct netlink_ext_ack *extack); 1784 void br_stp_enable_port(struct net_bridge_port *p); 1785 void br_stp_disable_port(struct net_bridge_port *p); 1786 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1787 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1788 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1789 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1790 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1791 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1792 1793 /* br_stp_bpdu.c */ 1794 struct stp_proto; 1795 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1796 struct net_device *dev); 1797 1798 /* br_stp_timer.c */ 1799 void br_stp_timer_init(struct net_bridge *br); 1800 void br_stp_port_timer_init(struct net_bridge_port *p); 1801 unsigned long br_timer_value(const struct timer_list *timer); 1802 1803 /* br.c */ 1804 #if IS_ENABLED(CONFIG_ATM_LANE) 1805 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1806 #endif 1807 1808 /* br_mrp.c */ 1809 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1810 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1811 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1812 bool br_mrp_enabled(struct net_bridge *br); 1813 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1814 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1815 #else 1816 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1817 struct nlattr *attr, int cmd, 1818 struct netlink_ext_ack *extack) 1819 { 1820 return -EOPNOTSUPP; 1821 } 1822 1823 static inline bool br_mrp_enabled(struct net_bridge *br) 1824 { 1825 return false; 1826 } 1827 1828 static inline void br_mrp_port_del(struct net_bridge *br, 1829 struct net_bridge_port *p) 1830 { 1831 } 1832 1833 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1834 { 1835 return 0; 1836 } 1837 1838 #endif 1839 1840 /* br_cfm.c */ 1841 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1842 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1843 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1844 bool br_cfm_created(struct net_bridge *br); 1845 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1846 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1847 int br_cfm_status_fill_info(struct sk_buff *skb, 1848 struct net_bridge *br, 1849 bool getlink); 1850 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1851 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1852 #else 1853 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1854 struct nlattr *attr, int cmd, 1855 struct netlink_ext_ack *extack) 1856 { 1857 return -EOPNOTSUPP; 1858 } 1859 1860 static inline bool br_cfm_created(struct net_bridge *br) 1861 { 1862 return false; 1863 } 1864 1865 static inline void br_cfm_port_del(struct net_bridge *br, 1866 struct net_bridge_port *p) 1867 { 1868 } 1869 1870 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1871 { 1872 return -EOPNOTSUPP; 1873 } 1874 1875 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1876 struct net_bridge *br, 1877 bool getlink) 1878 { 1879 return -EOPNOTSUPP; 1880 } 1881 1882 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1883 { 1884 return -EOPNOTSUPP; 1885 } 1886 1887 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1888 { 1889 return -EOPNOTSUPP; 1890 } 1891 #endif 1892 1893 /* br_netlink.c */ 1894 extern struct rtnl_link_ops br_link_ops; 1895 int br_netlink_init(void); 1896 void br_netlink_fini(void); 1897 void br_ifinfo_notify(int event, const struct net_bridge *br, 1898 const struct net_bridge_port *port); 1899 void br_info_notify(int event, const struct net_bridge *br, 1900 const struct net_bridge_port *port, u32 filter); 1901 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1902 struct netlink_ext_ack *extack); 1903 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1904 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1905 u32 filter_mask, int nlflags); 1906 int br_process_vlan_info(struct net_bridge *br, 1907 struct net_bridge_port *p, int cmd, 1908 struct bridge_vlan_info *vinfo_curr, 1909 struct bridge_vlan_info **vinfo_last, 1910 bool *changed, 1911 struct netlink_ext_ack *extack); 1912 1913 #ifdef CONFIG_SYSFS 1914 /* br_sysfs_if.c */ 1915 extern const struct sysfs_ops brport_sysfs_ops; 1916 int br_sysfs_addif(struct net_bridge_port *p); 1917 int br_sysfs_renameif(struct net_bridge_port *p); 1918 1919 /* br_sysfs_br.c */ 1920 int br_sysfs_addbr(struct net_device *dev); 1921 void br_sysfs_delbr(struct net_device *dev); 1922 1923 #else 1924 1925 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1926 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1927 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1928 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1929 #endif /* CONFIG_SYSFS */ 1930 1931 /* br_switchdev.c */ 1932 #ifdef CONFIG_NET_SWITCHDEV 1933 int br_switchdev_port_offload(struct net_bridge_port *p, 1934 struct net_device *dev, const void *ctx, 1935 struct notifier_block *atomic_nb, 1936 struct notifier_block *blocking_nb, 1937 bool tx_fwd_offload, 1938 struct netlink_ext_ack *extack); 1939 1940 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1941 struct notifier_block *atomic_nb, 1942 struct notifier_block *blocking_nb); 1943 1944 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1945 1946 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1947 1948 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1949 struct sk_buff *skb); 1950 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1951 struct sk_buff *skb); 1952 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1953 struct sk_buff *skb); 1954 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1955 const struct sk_buff *skb); 1956 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1957 unsigned long flags, 1958 unsigned long mask, 1959 struct netlink_ext_ack *extack); 1960 void br_switchdev_fdb_notify(struct net_bridge *br, 1961 const struct net_bridge_fdb_entry *fdb, int type); 1962 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1963 struct netlink_ext_ack *extack); 1964 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1965 void br_switchdev_init(struct net_bridge *br); 1966 1967 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1968 { 1969 skb->offload_fwd_mark = 0; 1970 } 1971 #else 1972 static inline int 1973 br_switchdev_port_offload(struct net_bridge_port *p, 1974 struct net_device *dev, const void *ctx, 1975 struct notifier_block *atomic_nb, 1976 struct notifier_block *blocking_nb, 1977 bool tx_fwd_offload, 1978 struct netlink_ext_ack *extack) 1979 { 1980 return -EOPNOTSUPP; 1981 } 1982 1983 static inline void 1984 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1985 struct notifier_block *atomic_nb, 1986 struct notifier_block *blocking_nb) 1987 { 1988 } 1989 1990 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 1991 { 1992 return false; 1993 } 1994 1995 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 1996 { 1997 } 1998 1999 static inline void 2000 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2001 struct sk_buff *skb) 2002 { 2003 } 2004 2005 static inline void 2006 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2007 struct sk_buff *skb) 2008 { 2009 } 2010 2011 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2012 struct sk_buff *skb) 2013 { 2014 } 2015 2016 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2017 const struct sk_buff *skb) 2018 { 2019 return true; 2020 } 2021 2022 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2023 unsigned long flags, 2024 unsigned long mask, 2025 struct netlink_ext_ack *extack) 2026 { 2027 return 0; 2028 } 2029 2030 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2031 u16 vid, u16 flags, 2032 struct netlink_ext_ack *extack) 2033 { 2034 return -EOPNOTSUPP; 2035 } 2036 2037 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2038 { 2039 return -EOPNOTSUPP; 2040 } 2041 2042 static inline void 2043 br_switchdev_fdb_notify(struct net_bridge *br, 2044 const struct net_bridge_fdb_entry *fdb, int type) 2045 { 2046 } 2047 2048 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2049 { 2050 } 2051 2052 static inline void br_switchdev_init(struct net_bridge *br) 2053 { 2054 } 2055 2056 #endif /* CONFIG_NET_SWITCHDEV */ 2057 2058 /* br_arp_nd_proxy.c */ 2059 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2060 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2061 u16 vid, struct net_bridge_port *p); 2062 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2063 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2064 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2065 #endif 2066