1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 9 #ifndef _BR_PRIVATE_H 10 #define _BR_PRIVATE_H 11 12 #include <linux/netdevice.h> 13 #include <linux/if_bridge.h> 14 #include <linux/netpoll.h> 15 #include <linux/u64_stats_sync.h> 16 #include <net/route.h> 17 #include <net/ip6_fib.h> 18 #include <linux/if_vlan.h> 19 #include <linux/rhashtable.h> 20 #include <linux/refcount.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 31 32 #define BR_HWDOM_MAX BITS_PER_LONG 33 34 #define BR_VERSION "2.3" 35 36 /* Control of forwarding link local multicast */ 37 #define BR_GROUPFWD_DEFAULT 0 38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 39 enum { 40 BR_GROUPFWD_STP = BIT(0), 41 BR_GROUPFWD_MACPAUSE = BIT(1), 42 BR_GROUPFWD_LACP = BIT(2), 43 }; 44 45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 46 BR_GROUPFWD_LACP) 47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 48 #define BR_GROUPFWD_8021AD 0xB801u 49 50 /* Path to usermode spanning tree program */ 51 #define BR_STP_PROG "/sbin/bridge-stp" 52 53 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 54 55 typedef struct bridge_id bridge_id; 56 typedef struct mac_addr mac_addr; 57 typedef __u16 port_id; 58 59 struct bridge_id { 60 unsigned char prio[2]; 61 unsigned char addr[ETH_ALEN]; 62 }; 63 64 struct mac_addr { 65 unsigned char addr[ETH_ALEN]; 66 }; 67 68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 69 /* our own querier */ 70 struct bridge_mcast_own_query { 71 struct timer_list timer; 72 u32 startup_sent; 73 }; 74 75 /* other querier */ 76 struct bridge_mcast_other_query { 77 struct timer_list timer; 78 unsigned long delay_time; 79 }; 80 81 /* selected querier */ 82 struct bridge_mcast_querier { 83 struct br_ip addr; 84 int port_ifidx; 85 seqcount_t seq; 86 }; 87 88 /* IGMP/MLD statistics */ 89 struct bridge_mcast_stats { 90 struct br_mcast_stats mstats; 91 struct u64_stats_sync syncp; 92 }; 93 #endif 94 95 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 96 struct net_bridge_mcast_port { 97 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 98 struct net_bridge_port *port; 99 struct net_bridge_vlan *vlan; 100 101 struct bridge_mcast_own_query ip4_own_query; 102 struct timer_list ip4_mc_router_timer; 103 struct hlist_node ip4_rlist; 104 #if IS_ENABLED(CONFIG_IPV6) 105 struct bridge_mcast_own_query ip6_own_query; 106 struct timer_list ip6_mc_router_timer; 107 struct hlist_node ip6_rlist; 108 #endif /* IS_ENABLED(CONFIG_IPV6) */ 109 unsigned char multicast_router; 110 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 111 }; 112 113 /* net_bridge_mcast must be always defined due to forwarding stubs */ 114 struct net_bridge_mcast { 115 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 116 struct net_bridge *br; 117 struct net_bridge_vlan *vlan; 118 119 u32 multicast_last_member_count; 120 u32 multicast_startup_query_count; 121 122 u8 multicast_querier; 123 u8 multicast_igmp_version; 124 u8 multicast_router; 125 #if IS_ENABLED(CONFIG_IPV6) 126 u8 multicast_mld_version; 127 #endif 128 unsigned long multicast_last_member_interval; 129 unsigned long multicast_membership_interval; 130 unsigned long multicast_querier_interval; 131 unsigned long multicast_query_interval; 132 unsigned long multicast_query_response_interval; 133 unsigned long multicast_startup_query_interval; 134 struct hlist_head ip4_mc_router_list; 135 struct timer_list ip4_mc_router_timer; 136 struct bridge_mcast_other_query ip4_other_query; 137 struct bridge_mcast_own_query ip4_own_query; 138 struct bridge_mcast_querier ip4_querier; 139 #if IS_ENABLED(CONFIG_IPV6) 140 struct hlist_head ip6_mc_router_list; 141 struct timer_list ip6_mc_router_timer; 142 struct bridge_mcast_other_query ip6_other_query; 143 struct bridge_mcast_own_query ip6_own_query; 144 struct bridge_mcast_querier ip6_querier; 145 #endif /* IS_ENABLED(CONFIG_IPV6) */ 146 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 147 }; 148 149 struct br_tunnel_info { 150 __be64 tunnel_id; 151 struct metadata_dst __rcu *tunnel_dst; 152 }; 153 154 /* private vlan flags */ 155 enum { 156 BR_VLFLAG_PER_PORT_STATS = BIT(0), 157 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 158 BR_VLFLAG_MCAST_ENABLED = BIT(2), 159 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 160 }; 161 162 /** 163 * struct net_bridge_vlan - per-vlan entry 164 * 165 * @vnode: rhashtable member 166 * @vid: VLAN id 167 * @flags: bridge vlan flags 168 * @priv_flags: private (in-kernel) bridge vlan flags 169 * @state: STP state (e.g. blocking, learning, forwarding) 170 * @stats: per-cpu VLAN statistics 171 * @br: if MASTER flag set, this points to a bridge struct 172 * @port: if MASTER flag unset, this points to a port struct 173 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 174 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 175 * for this VLAN entry 176 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 177 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 178 * context 179 * @vlist: sorted list of VLAN entries 180 * @rcu: used for entry destruction 181 * 182 * This structure is shared between the global per-VLAN entries contained in 183 * the bridge rhashtable and the local per-port per-VLAN entries contained in 184 * the port's rhashtable. The union entries should be interpreted depending on 185 * the entry flags that are set. 186 */ 187 struct net_bridge_vlan { 188 struct rhash_head vnode; 189 struct rhash_head tnode; 190 u16 vid; 191 u16 flags; 192 u16 priv_flags; 193 u8 state; 194 struct pcpu_sw_netstats __percpu *stats; 195 union { 196 struct net_bridge *br; 197 struct net_bridge_port *port; 198 }; 199 union { 200 refcount_t refcnt; 201 struct net_bridge_vlan *brvlan; 202 }; 203 204 struct br_tunnel_info tinfo; 205 206 union { 207 struct net_bridge_mcast br_mcast_ctx; 208 struct net_bridge_mcast_port port_mcast_ctx; 209 }; 210 211 struct list_head vlist; 212 213 struct rcu_head rcu; 214 }; 215 216 /** 217 * struct net_bridge_vlan_group 218 * 219 * @vlan_hash: VLAN entry rhashtable 220 * @vlan_list: sorted VLAN entry list 221 * @num_vlans: number of total VLAN entries 222 * @pvid: PVID VLAN id 223 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 224 * 225 * IMPORTANT: Be careful when checking if there're VLAN entries using list 226 * primitives because the bridge can have entries in its list which 227 * are just for global context but not for filtering, i.e. they have 228 * the master flag set but not the brentry flag. If you have to check 229 * if there're "real" entries in the bridge please test @num_vlans 230 */ 231 struct net_bridge_vlan_group { 232 struct rhashtable vlan_hash; 233 struct rhashtable tunnel_hash; 234 struct list_head vlan_list; 235 u16 num_vlans; 236 u16 pvid; 237 u8 pvid_state; 238 }; 239 240 /* bridge fdb flags */ 241 enum { 242 BR_FDB_LOCAL, 243 BR_FDB_STATIC, 244 BR_FDB_STICKY, 245 BR_FDB_ADDED_BY_USER, 246 BR_FDB_ADDED_BY_EXT_LEARN, 247 BR_FDB_OFFLOADED, 248 BR_FDB_NOTIFY, 249 BR_FDB_NOTIFY_INACTIVE 250 }; 251 252 struct net_bridge_fdb_key { 253 mac_addr addr; 254 u16 vlan_id; 255 }; 256 257 struct net_bridge_fdb_entry { 258 struct rhash_head rhnode; 259 struct net_bridge_port *dst; 260 261 struct net_bridge_fdb_key key; 262 struct hlist_node fdb_node; 263 unsigned long flags; 264 265 /* write-heavy members should not affect lookups */ 266 unsigned long updated ____cacheline_aligned_in_smp; 267 unsigned long used; 268 269 struct rcu_head rcu; 270 }; 271 272 #define MDB_PG_FLAGS_PERMANENT BIT(0) 273 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 274 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 275 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 276 #define MDB_PG_FLAGS_BLOCKED BIT(4) 277 278 #define PG_SRC_ENT_LIMIT 32 279 280 #define BR_SGRP_F_DELETE BIT(0) 281 #define BR_SGRP_F_SEND BIT(1) 282 #define BR_SGRP_F_INSTALLED BIT(2) 283 284 struct net_bridge_mcast_gc { 285 struct hlist_node gc_node; 286 void (*destroy)(struct net_bridge_mcast_gc *gc); 287 }; 288 289 struct net_bridge_group_src { 290 struct hlist_node node; 291 292 struct br_ip addr; 293 struct net_bridge_port_group *pg; 294 u8 flags; 295 u8 src_query_rexmit_cnt; 296 struct timer_list timer; 297 298 struct net_bridge *br; 299 struct net_bridge_mcast_gc mcast_gc; 300 struct rcu_head rcu; 301 }; 302 303 struct net_bridge_port_group_sg_key { 304 struct net_bridge_port *port; 305 struct br_ip addr; 306 }; 307 308 struct net_bridge_port_group { 309 struct net_bridge_port_group __rcu *next; 310 struct net_bridge_port_group_sg_key key; 311 unsigned char eth_addr[ETH_ALEN] __aligned(2); 312 unsigned char flags; 313 unsigned char filter_mode; 314 unsigned char grp_query_rexmit_cnt; 315 unsigned char rt_protocol; 316 317 struct hlist_head src_list; 318 unsigned int src_ents; 319 struct timer_list timer; 320 struct timer_list rexmit_timer; 321 struct hlist_node mglist; 322 struct rb_root eht_set_tree; 323 struct rb_root eht_host_tree; 324 325 struct rhash_head rhnode; 326 struct net_bridge_mcast_gc mcast_gc; 327 struct rcu_head rcu; 328 }; 329 330 struct net_bridge_mdb_entry { 331 struct rhash_head rhnode; 332 struct net_bridge *br; 333 struct net_bridge_port_group __rcu *ports; 334 struct br_ip addr; 335 bool host_joined; 336 337 struct timer_list timer; 338 struct hlist_node mdb_node; 339 340 struct net_bridge_mcast_gc mcast_gc; 341 struct rcu_head rcu; 342 }; 343 344 struct net_bridge_port { 345 struct net_bridge *br; 346 struct net_device *dev; 347 struct list_head list; 348 349 unsigned long flags; 350 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 351 struct net_bridge_vlan_group __rcu *vlgrp; 352 #endif 353 struct net_bridge_port __rcu *backup_port; 354 355 /* STP */ 356 u8 priority; 357 u8 state; 358 u16 port_no; 359 unsigned char topology_change_ack; 360 unsigned char config_pending; 361 port_id port_id; 362 port_id designated_port; 363 bridge_id designated_root; 364 bridge_id designated_bridge; 365 u32 path_cost; 366 u32 designated_cost; 367 unsigned long designated_age; 368 369 struct timer_list forward_delay_timer; 370 struct timer_list hold_timer; 371 struct timer_list message_age_timer; 372 struct kobject kobj; 373 struct rcu_head rcu; 374 375 struct net_bridge_mcast_port multicast_ctx; 376 377 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 378 struct bridge_mcast_stats __percpu *mcast_stats; 379 380 u32 multicast_eht_hosts_limit; 381 u32 multicast_eht_hosts_cnt; 382 struct hlist_head mglist; 383 #endif 384 385 #ifdef CONFIG_SYSFS 386 char sysfs_name[IFNAMSIZ]; 387 #endif 388 389 #ifdef CONFIG_NET_POLL_CONTROLLER 390 struct netpoll *np; 391 #endif 392 #ifdef CONFIG_NET_SWITCHDEV 393 /* Identifier used to group ports that share the same switchdev 394 * hardware domain. 395 */ 396 int hwdom; 397 int offload_count; 398 struct netdev_phys_item_id ppid; 399 #endif 400 u16 group_fwd_mask; 401 u16 backup_redirected_cnt; 402 403 struct bridge_stp_xstats stp_xstats; 404 }; 405 406 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 407 408 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 409 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 410 411 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 412 { 413 return rcu_dereference(dev->rx_handler_data); 414 } 415 416 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 417 { 418 return netif_is_bridge_port(dev) ? 419 rtnl_dereference(dev->rx_handler_data) : NULL; 420 } 421 422 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 423 { 424 return netif_is_bridge_port(dev) ? 425 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 426 } 427 428 enum net_bridge_opts { 429 BROPT_VLAN_ENABLED, 430 BROPT_VLAN_STATS_ENABLED, 431 BROPT_NF_CALL_IPTABLES, 432 BROPT_NF_CALL_IP6TABLES, 433 BROPT_NF_CALL_ARPTABLES, 434 BROPT_GROUP_ADDR_SET, 435 BROPT_MULTICAST_ENABLED, 436 BROPT_MULTICAST_QUERY_USE_IFADDR, 437 BROPT_MULTICAST_STATS_ENABLED, 438 BROPT_HAS_IPV6_ADDR, 439 BROPT_NEIGH_SUPPRESS_ENABLED, 440 BROPT_MTU_SET_BY_USER, 441 BROPT_VLAN_STATS_PER_PORT, 442 BROPT_NO_LL_LEARN, 443 BROPT_VLAN_BRIDGE_BINDING, 444 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 445 }; 446 447 struct net_bridge { 448 spinlock_t lock; 449 spinlock_t hash_lock; 450 struct hlist_head frame_type_list; 451 struct net_device *dev; 452 unsigned long options; 453 /* These fields are accessed on each packet */ 454 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 455 __be16 vlan_proto; 456 u16 default_pvid; 457 struct net_bridge_vlan_group __rcu *vlgrp; 458 #endif 459 460 struct rhashtable fdb_hash_tbl; 461 struct list_head port_list; 462 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 463 union { 464 struct rtable fake_rtable; 465 struct rt6_info fake_rt6_info; 466 }; 467 #endif 468 u16 group_fwd_mask; 469 u16 group_fwd_mask_required; 470 471 /* STP */ 472 bridge_id designated_root; 473 bridge_id bridge_id; 474 unsigned char topology_change; 475 unsigned char topology_change_detected; 476 u16 root_port; 477 unsigned long max_age; 478 unsigned long hello_time; 479 unsigned long forward_delay; 480 unsigned long ageing_time; 481 unsigned long bridge_max_age; 482 unsigned long bridge_hello_time; 483 unsigned long bridge_forward_delay; 484 unsigned long bridge_ageing_time; 485 u32 root_path_cost; 486 487 u8 group_addr[ETH_ALEN]; 488 489 enum { 490 BR_NO_STP, /* no spanning tree */ 491 BR_KERNEL_STP, /* old STP in kernel */ 492 BR_USER_STP, /* new RSTP in userspace */ 493 } stp_enabled; 494 495 struct net_bridge_mcast multicast_ctx; 496 497 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 498 struct bridge_mcast_stats __percpu *mcast_stats; 499 500 u32 hash_max; 501 502 spinlock_t multicast_lock; 503 504 struct rhashtable mdb_hash_tbl; 505 struct rhashtable sg_port_tbl; 506 507 struct hlist_head mcast_gc_list; 508 struct hlist_head mdb_list; 509 510 struct work_struct mcast_gc_work; 511 #endif 512 513 struct timer_list hello_timer; 514 struct timer_list tcn_timer; 515 struct timer_list topology_change_timer; 516 struct delayed_work gc_work; 517 struct kobject *ifobj; 518 u32 auto_cnt; 519 520 #ifdef CONFIG_NET_SWITCHDEV 521 /* Counter used to make sure that hardware domains get unique 522 * identifiers in case a bridge spans multiple switchdev instances. 523 */ 524 int last_hwdom; 525 /* Bit mask of hardware domain numbers in use */ 526 unsigned long busy_hwdoms; 527 #endif 528 struct hlist_head fdb_list; 529 530 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 531 struct hlist_head mrp_list; 532 #endif 533 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 534 struct hlist_head mep_list; 535 #endif 536 }; 537 538 struct br_input_skb_cb { 539 struct net_device *brdev; 540 541 u16 frag_max_size; 542 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 543 u8 igmp; 544 u8 mrouters_only:1; 545 #endif 546 u8 proxyarp_replied:1; 547 u8 src_port_isolated:1; 548 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 549 u8 vlan_filtered:1; 550 #endif 551 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 552 u8 br_netfilter_broute:1; 553 #endif 554 555 #ifdef CONFIG_NET_SWITCHDEV 556 /* Set if TX data plane offloading is used towards at least one 557 * hardware domain. 558 */ 559 u8 tx_fwd_offload:1; 560 /* The switchdev hardware domain from which this packet was received. 561 * If skb->offload_fwd_mark was set, then this packet was already 562 * forwarded by hardware to the other ports in the source hardware 563 * domain, otherwise it wasn't. 564 */ 565 int src_hwdom; 566 /* Bit mask of hardware domains towards this packet has already been 567 * transmitted using the TX data plane offload. 568 */ 569 unsigned long fwd_hwdoms; 570 #endif 571 }; 572 573 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 574 575 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 576 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 577 #else 578 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 579 #endif 580 581 #define br_printk(level, br, format, args...) \ 582 printk(level "%s: " format, (br)->dev->name, ##args) 583 584 #define br_err(__br, format, args...) \ 585 br_printk(KERN_ERR, __br, format, ##args) 586 #define br_warn(__br, format, args...) \ 587 br_printk(KERN_WARNING, __br, format, ##args) 588 #define br_notice(__br, format, args...) \ 589 br_printk(KERN_NOTICE, __br, format, ##args) 590 #define br_info(__br, format, args...) \ 591 br_printk(KERN_INFO, __br, format, ##args) 592 593 #define br_debug(br, format, args...) \ 594 pr_debug("%s: " format, (br)->dev->name, ##args) 595 596 /* called under bridge lock */ 597 static inline int br_is_root_bridge(const struct net_bridge *br) 598 { 599 return !memcmp(&br->bridge_id, &br->designated_root, 8); 600 } 601 602 /* check if a VLAN entry is global */ 603 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 604 { 605 return v->flags & BRIDGE_VLAN_INFO_MASTER; 606 } 607 608 /* check if a VLAN entry is used by the bridge */ 609 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 610 { 611 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 612 } 613 614 /* check if we should use the vlan entry, returns false if it's only context */ 615 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 616 { 617 if (br_vlan_is_master(v)) { 618 if (br_vlan_is_brentry(v)) 619 return true; 620 else 621 return false; 622 } 623 624 return true; 625 } 626 627 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 628 { 629 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 630 } 631 632 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 633 { 634 bool ret = vid > 0 && vid < VLAN_VID_MASK; 635 636 if (!ret) 637 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 638 639 return ret; 640 } 641 642 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 643 const struct bridge_vlan_info *last, 644 struct netlink_ext_ack *extack) 645 { 646 /* pvid flag is not allowed in ranges */ 647 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 648 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 649 return false; 650 } 651 652 /* when cur is the range end, check if: 653 * - it has range start flag 654 * - range ids are invalid (end is equal to or before start) 655 */ 656 if (last) { 657 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 658 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 659 return false; 660 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 661 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 662 return false; 663 } else if (cur->vid <= last->vid) { 664 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 665 return false; 666 } 667 } 668 669 /* check for required range flags */ 670 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 671 BRIDGE_VLAN_INFO_RANGE_END))) { 672 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 673 return false; 674 } 675 676 return true; 677 } 678 679 static inline int br_afspec_cmd_to_rtm(int cmd) 680 { 681 switch (cmd) { 682 case RTM_SETLINK: 683 return RTM_NEWVLAN; 684 case RTM_DELLINK: 685 return RTM_DELVLAN; 686 } 687 688 return 0; 689 } 690 691 static inline int br_opt_get(const struct net_bridge *br, 692 enum net_bridge_opts opt) 693 { 694 return test_bit(opt, &br->options); 695 } 696 697 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 698 struct netlink_ext_ack *extack); 699 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 700 int br_boolopt_multi_toggle(struct net_bridge *br, 701 struct br_boolopt_multi *bm, 702 struct netlink_ext_ack *extack); 703 void br_boolopt_multi_get(const struct net_bridge *br, 704 struct br_boolopt_multi *bm); 705 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 706 707 /* br_device.c */ 708 void br_dev_setup(struct net_device *dev); 709 void br_dev_delete(struct net_device *dev, struct list_head *list); 710 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 711 #ifdef CONFIG_NET_POLL_CONTROLLER 712 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 713 struct sk_buff *skb) 714 { 715 netpoll_send_skb(p->np, skb); 716 } 717 718 int br_netpoll_enable(struct net_bridge_port *p); 719 void br_netpoll_disable(struct net_bridge_port *p); 720 #else 721 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 722 struct sk_buff *skb) 723 { 724 } 725 726 static inline int br_netpoll_enable(struct net_bridge_port *p) 727 { 728 return 0; 729 } 730 731 static inline void br_netpoll_disable(struct net_bridge_port *p) 732 { 733 } 734 #endif 735 736 /* br_fdb.c */ 737 int br_fdb_init(void); 738 void br_fdb_fini(void); 739 int br_fdb_hash_init(struct net_bridge *br); 740 void br_fdb_hash_fini(struct net_bridge *br); 741 void br_fdb_flush(struct net_bridge *br); 742 void br_fdb_find_delete_local(struct net_bridge *br, 743 const struct net_bridge_port *p, 744 const unsigned char *addr, u16 vid); 745 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 746 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 747 void br_fdb_cleanup(struct work_struct *work); 748 void br_fdb_delete_by_port(struct net_bridge *br, 749 const struct net_bridge_port *p, u16 vid, int do_all); 750 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 751 const unsigned char *addr, 752 __u16 vid); 753 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 754 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 755 unsigned long off); 756 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, 757 const unsigned char *addr, u16 vid); 758 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 759 const unsigned char *addr, u16 vid, unsigned long flags); 760 761 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 762 struct net_device *dev, const unsigned char *addr, u16 vid); 763 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 764 const unsigned char *addr, u16 vid, u16 nlh_flags, 765 struct netlink_ext_ack *extack); 766 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 767 struct net_device *dev, struct net_device *fdev, int *idx); 768 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 769 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 770 struct netlink_ext_ack *extack); 771 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 772 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 773 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 774 const unsigned char *addr, u16 vid, 775 bool swdev_notify); 776 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 777 const unsigned char *addr, u16 vid, 778 bool swdev_notify); 779 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 780 const unsigned char *addr, u16 vid, bool offloaded); 781 int br_fdb_replay(const struct net_device *br_dev, const void *ctx, bool adding, 782 struct notifier_block *nb); 783 784 /* br_forward.c */ 785 enum br_pkt_type { 786 BR_PKT_UNICAST, 787 BR_PKT_MULTICAST, 788 BR_PKT_BROADCAST 789 }; 790 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 791 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 792 bool local_rcv, bool local_orig); 793 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 794 void br_flood(struct net_bridge *br, struct sk_buff *skb, 795 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig); 796 797 /* return true if both source port and dest port are isolated */ 798 static inline bool br_skb_isolated(const struct net_bridge_port *to, 799 const struct sk_buff *skb) 800 { 801 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 802 (to->flags & BR_ISOLATED); 803 } 804 805 /* br_if.c */ 806 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 807 int br_add_bridge(struct net *net, const char *name); 808 int br_del_bridge(struct net *net, const char *name); 809 int br_add_if(struct net_bridge *br, struct net_device *dev, 810 struct netlink_ext_ack *extack); 811 int br_del_if(struct net_bridge *br, struct net_device *dev); 812 void br_mtu_auto_adjust(struct net_bridge *br); 813 netdev_features_t br_features_recompute(struct net_bridge *br, 814 netdev_features_t features); 815 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 816 void br_manage_promisc(struct net_bridge *br); 817 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 818 819 /* br_input.c */ 820 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 821 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 822 823 struct br_frame_type { 824 __be16 type; 825 int (*frame_handler)(struct net_bridge_port *port, 826 struct sk_buff *skb); 827 struct hlist_node list; 828 }; 829 830 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 831 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 832 833 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 834 { 835 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 836 } 837 838 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 839 { 840 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 841 } 842 843 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 844 { 845 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 846 } 847 848 static inline struct net_bridge_port * 849 br_port_get_check_rtnl(const struct net_device *dev) 850 { 851 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 852 } 853 854 /* br_ioctl.c */ 855 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 856 void __user *data, int cmd); 857 int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd, 858 struct ifreq *ifr, void __user *uarg); 859 860 /* br_multicast.c */ 861 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 862 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 863 struct net_bridge_mcast_port **pmctx, 864 struct net_bridge_vlan *vlan, 865 struct sk_buff *skb, u16 vid); 866 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 867 struct sk_buff *skb, u16 vid); 868 int br_multicast_add_port(struct net_bridge_port *port); 869 void br_multicast_del_port(struct net_bridge_port *port); 870 void br_multicast_enable_port(struct net_bridge_port *port); 871 void br_multicast_disable_port(struct net_bridge_port *port); 872 void br_multicast_init(struct net_bridge *br); 873 void br_multicast_join_snoopers(struct net_bridge *br); 874 void br_multicast_leave_snoopers(struct net_bridge *br); 875 void br_multicast_open(struct net_bridge *br); 876 void br_multicast_stop(struct net_bridge *br); 877 void br_multicast_dev_del(struct net_bridge *br); 878 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 879 struct net_bridge_mcast *brmctx, 880 bool local_rcv, bool local_orig); 881 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 882 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val); 883 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 884 struct netlink_ext_ack *extack); 885 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 886 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val); 887 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 888 unsigned long val); 889 #if IS_ENABLED(CONFIG_IPV6) 890 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 891 unsigned long val); 892 #endif 893 struct net_bridge_mdb_entry * 894 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 895 struct net_bridge_mdb_entry * 896 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 897 struct net_bridge_port_group * 898 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group, 899 struct net_bridge_port_group __rcu *next, 900 unsigned char flags, const unsigned char *src, 901 u8 filter_mode, u8 rt_protocol); 902 int br_mdb_hash_init(struct net_bridge *br); 903 void br_mdb_hash_fini(struct net_bridge *br); 904 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 905 struct net_bridge_port_group *pg, int type); 906 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 907 int type); 908 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 909 struct net_bridge_port_group *pg, 910 struct net_bridge_port_group __rcu **pp); 911 void br_multicast_count(struct net_bridge *br, 912 const struct net_bridge_port *p, 913 const struct sk_buff *skb, u8 type, u8 dir); 914 int br_multicast_init_stats(struct net_bridge *br); 915 void br_multicast_uninit_stats(struct net_bridge *br); 916 void br_multicast_get_stats(const struct net_bridge *br, 917 const struct net_bridge_port *p, 918 struct br_mcast_stats *dest); 919 void br_mdb_init(void); 920 void br_mdb_uninit(void); 921 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 922 struct net_bridge_mdb_entry *mp, bool notify); 923 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 924 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 925 u8 filter_mode); 926 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 927 struct net_bridge_port_group *sg); 928 struct net_bridge_group_src * 929 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 930 void br_multicast_del_group_src(struct net_bridge_group_src *src, 931 bool fastleave); 932 void br_multicast_ctx_init(struct net_bridge *br, 933 struct net_bridge_vlan *vlan, 934 struct net_bridge_mcast *brmctx); 935 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 936 void br_multicast_port_ctx_init(struct net_bridge_port *port, 937 struct net_bridge_vlan *vlan, 938 struct net_bridge_mcast_port *pmctx); 939 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 940 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 941 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 int br_rports_fill_info(struct sk_buff *skb, 949 const struct net_bridge_mcast *brmctx); 950 int br_multicast_dump_querier_state(struct sk_buff *skb, 951 const struct net_bridge_mcast *brmctx, 952 int nest_attr); 953 size_t br_multicast_querier_state_size(void); 954 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 955 956 static inline bool br_group_is_l2(const struct br_ip *group) 957 { 958 return group->proto == 0; 959 } 960 961 #define mlock_dereference(X, br) \ 962 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 963 964 static inline struct hlist_node * 965 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 966 struct sk_buff *skb) 967 { 968 #if IS_ENABLED(CONFIG_IPV6) 969 if (skb->protocol == htons(ETH_P_IPV6)) 970 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 971 #endif 972 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 973 } 974 975 static inline struct net_bridge_port * 976 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 977 { 978 struct net_bridge_mcast_port *mctx; 979 980 #if IS_ENABLED(CONFIG_IPV6) 981 if (skb->protocol == htons(ETH_P_IPV6)) 982 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 983 ip6_rlist); 984 else 985 #endif 986 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 987 ip4_rlist); 988 989 if (mctx) 990 return mctx->port; 991 else 992 return NULL; 993 } 994 995 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 996 { 997 return timer_pending(&brmctx->ip4_mc_router_timer); 998 } 999 1000 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1001 { 1002 #if IS_ENABLED(CONFIG_IPV6) 1003 return timer_pending(&brmctx->ip6_mc_router_timer); 1004 #else 1005 return false; 1006 #endif 1007 } 1008 1009 static inline bool 1010 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1011 { 1012 switch (brmctx->multicast_router) { 1013 case MDB_RTR_TYPE_PERM: 1014 return true; 1015 case MDB_RTR_TYPE_TEMP_QUERY: 1016 if (skb) { 1017 if (skb->protocol == htons(ETH_P_IP)) 1018 return br_ip4_multicast_is_router(brmctx); 1019 else if (skb->protocol == htons(ETH_P_IPV6)) 1020 return br_ip6_multicast_is_router(brmctx); 1021 } else { 1022 return br_ip4_multicast_is_router(brmctx) || 1023 br_ip6_multicast_is_router(brmctx); 1024 } 1025 fallthrough; 1026 default: 1027 return false; 1028 } 1029 } 1030 1031 static inline bool 1032 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1033 struct bridge_mcast_other_query *querier, 1034 const bool is_ipv6) 1035 { 1036 bool own_querier_enabled; 1037 1038 if (brmctx->multicast_querier) { 1039 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1040 own_querier_enabled = false; 1041 else 1042 own_querier_enabled = true; 1043 } else { 1044 own_querier_enabled = false; 1045 } 1046 1047 return time_is_before_jiffies(querier->delay_time) && 1048 (own_querier_enabled || timer_pending(&querier->timer)); 1049 } 1050 1051 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1052 struct ethhdr *eth, 1053 const struct net_bridge_mdb_entry *mdb) 1054 { 1055 switch (eth->h_proto) { 1056 case (htons(ETH_P_IP)): 1057 return __br_multicast_querier_exists(brmctx, 1058 &brmctx->ip4_other_query, false); 1059 #if IS_ENABLED(CONFIG_IPV6) 1060 case (htons(ETH_P_IPV6)): 1061 return __br_multicast_querier_exists(brmctx, 1062 &brmctx->ip6_other_query, true); 1063 #endif 1064 default: 1065 return !!mdb && br_group_is_l2(&mdb->addr); 1066 } 1067 } 1068 1069 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1070 { 1071 switch (ip->proto) { 1072 case htons(ETH_P_IP): 1073 return ipv4_is_zeronet(ip->src.ip4); 1074 #if IS_ENABLED(CONFIG_IPV6) 1075 case htons(ETH_P_IPV6): 1076 return ipv6_addr_any(&ip->src.ip6); 1077 #endif 1078 default: 1079 return false; 1080 } 1081 } 1082 1083 static inline bool 1084 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1085 __be16 proto) 1086 { 1087 switch (proto) { 1088 case htons(ETH_P_IP): 1089 return !!(brmctx->multicast_igmp_version == 3); 1090 #if IS_ENABLED(CONFIG_IPV6) 1091 case htons(ETH_P_IPV6): 1092 return !!(brmctx->multicast_mld_version == 2); 1093 #endif 1094 default: 1095 return false; 1096 } 1097 } 1098 1099 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1100 { 1101 return BR_INPUT_SKB_CB(skb)->igmp; 1102 } 1103 1104 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1105 { 1106 return brmctx->multicast_last_member_interval * 1107 brmctx->multicast_last_member_count; 1108 } 1109 1110 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1111 { 1112 /* use the RFC default of 2 for QRV */ 1113 return 2 * brmctx->multicast_query_interval + 1114 brmctx->multicast_query_response_interval; 1115 } 1116 1117 static inline bool 1118 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1119 { 1120 return !!brmctx->vlan; 1121 } 1122 1123 static inline bool 1124 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1125 { 1126 return !!pmctx->vlan; 1127 } 1128 1129 static inline struct net_bridge_mcast * 1130 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1131 { 1132 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1133 return &pmctx->port->br->multicast_ctx; 1134 else 1135 return &pmctx->vlan->brvlan->br_mcast_ctx; 1136 } 1137 1138 static inline bool 1139 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1140 { 1141 return br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) && 1142 br_multicast_ctx_is_vlan(brmctx) && 1143 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED); 1144 } 1145 1146 static inline bool 1147 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1148 { 1149 return br_multicast_ctx_is_vlan(brmctx) && 1150 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1151 } 1152 1153 static inline bool 1154 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1155 { 1156 return br_multicast_port_ctx_is_vlan(pmctx) && 1157 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1158 } 1159 1160 static inline bool 1161 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1162 { 1163 return pmctx->port->state == BR_STATE_DISABLED || 1164 (br_multicast_port_ctx_is_vlan(pmctx) && 1165 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1166 pmctx->vlan->state == BR_STATE_DISABLED)); 1167 } 1168 1169 static inline bool 1170 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1171 { 1172 return br_multicast_port_ctx_state_disabled(pmctx) || 1173 pmctx->port->state == BR_STATE_BLOCKING || 1174 (br_multicast_port_ctx_is_vlan(pmctx) && 1175 pmctx->vlan->state == BR_STATE_BLOCKING); 1176 } 1177 1178 static inline bool 1179 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1180 { 1181 #if IS_ENABLED(CONFIG_IPV6) 1182 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1183 !hlist_empty(&brmctx->ip6_mc_router_list); 1184 #else 1185 return !hlist_empty(&brmctx->ip4_mc_router_list); 1186 #endif 1187 } 1188 1189 static inline bool 1190 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1191 const struct net_bridge_mcast *brmctx2) 1192 { 1193 return brmctx1->multicast_igmp_version == 1194 brmctx2->multicast_igmp_version && 1195 brmctx1->multicast_last_member_count == 1196 brmctx2->multicast_last_member_count && 1197 brmctx1->multicast_startup_query_count == 1198 brmctx2->multicast_startup_query_count && 1199 brmctx1->multicast_last_member_interval == 1200 brmctx2->multicast_last_member_interval && 1201 brmctx1->multicast_membership_interval == 1202 brmctx2->multicast_membership_interval && 1203 brmctx1->multicast_querier_interval == 1204 brmctx2->multicast_querier_interval && 1205 brmctx1->multicast_query_interval == 1206 brmctx2->multicast_query_interval && 1207 brmctx1->multicast_query_response_interval == 1208 brmctx2->multicast_query_response_interval && 1209 brmctx1->multicast_startup_query_interval == 1210 brmctx2->multicast_startup_query_interval && 1211 brmctx1->multicast_querier == brmctx2->multicast_querier && 1212 brmctx1->multicast_router == brmctx2->multicast_router && 1213 !br_rports_have_mc_router(brmctx1) && 1214 !br_rports_have_mc_router(brmctx2) && 1215 #if IS_ENABLED(CONFIG_IPV6) 1216 brmctx1->multicast_mld_version == 1217 brmctx2->multicast_mld_version && 1218 #endif 1219 true; 1220 } 1221 1222 static inline bool 1223 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1224 { 1225 bool vlan_snooping_enabled; 1226 1227 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1228 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1229 1230 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1231 } 1232 #else 1233 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1234 struct net_bridge_mcast_port **pmctx, 1235 struct net_bridge_vlan *vlan, 1236 struct sk_buff *skb, 1237 u16 vid) 1238 { 1239 return 0; 1240 } 1241 1242 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx, 1243 struct sk_buff *skb, u16 vid) 1244 { 1245 return NULL; 1246 } 1247 1248 static inline int br_multicast_add_port(struct net_bridge_port *port) 1249 { 1250 return 0; 1251 } 1252 1253 static inline void br_multicast_del_port(struct net_bridge_port *port) 1254 { 1255 } 1256 1257 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1258 { 1259 } 1260 1261 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1262 { 1263 } 1264 1265 static inline void br_multicast_init(struct net_bridge *br) 1266 { 1267 } 1268 1269 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1270 { 1271 } 1272 1273 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1274 { 1275 } 1276 1277 static inline void br_multicast_open(struct net_bridge *br) 1278 { 1279 } 1280 1281 static inline void br_multicast_stop(struct net_bridge *br) 1282 { 1283 } 1284 1285 static inline void br_multicast_dev_del(struct net_bridge *br) 1286 { 1287 } 1288 1289 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1290 struct sk_buff *skb, 1291 struct net_bridge_mcast *brmctx, 1292 bool local_rcv, bool local_orig) 1293 { 1294 } 1295 1296 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1297 struct sk_buff *skb) 1298 { 1299 return false; 1300 } 1301 1302 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1303 struct ethhdr *eth, 1304 const struct net_bridge_mdb_entry *mdb) 1305 { 1306 return false; 1307 } 1308 1309 static inline void br_mdb_init(void) 1310 { 1311 } 1312 1313 static inline void br_mdb_uninit(void) 1314 { 1315 } 1316 1317 static inline int br_mdb_hash_init(struct net_bridge *br) 1318 { 1319 return 0; 1320 } 1321 1322 static inline void br_mdb_hash_fini(struct net_bridge *br) 1323 { 1324 } 1325 1326 static inline void br_multicast_count(struct net_bridge *br, 1327 const struct net_bridge_port *p, 1328 const struct sk_buff *skb, 1329 u8 type, u8 dir) 1330 { 1331 } 1332 1333 static inline int br_multicast_init_stats(struct net_bridge *br) 1334 { 1335 return 0; 1336 } 1337 1338 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1339 { 1340 } 1341 1342 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1343 { 1344 return 0; 1345 } 1346 1347 static inline void br_multicast_ctx_init(struct net_bridge *br, 1348 struct net_bridge_vlan *vlan, 1349 struct net_bridge_mcast *brmctx) 1350 { 1351 } 1352 1353 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1354 { 1355 } 1356 1357 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1358 struct net_bridge_vlan *vlan, 1359 struct net_bridge_mcast_port *pmctx) 1360 { 1361 } 1362 1363 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1364 { 1365 } 1366 1367 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1368 bool on) 1369 { 1370 } 1371 1372 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1373 bool on, 1374 struct netlink_ext_ack *extack) 1375 { 1376 return -EOPNOTSUPP; 1377 } 1378 1379 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1380 bool on) 1381 { 1382 return false; 1383 } 1384 1385 static inline int br_mdb_replay(struct net_device *br_dev, 1386 struct net_device *dev, const void *ctx, 1387 bool adding, struct notifier_block *nb, 1388 struct netlink_ext_ack *extack) 1389 { 1390 return -EOPNOTSUPP; 1391 } 1392 1393 static inline bool 1394 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1395 const struct net_bridge_mcast *brmctx2) 1396 { 1397 return true; 1398 } 1399 #endif 1400 1401 /* br_vlan.c */ 1402 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1403 bool br_allowed_ingress(const struct net_bridge *br, 1404 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1405 u16 *vid, u8 *state, 1406 struct net_bridge_vlan **vlan); 1407 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1408 const struct sk_buff *skb); 1409 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1410 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1411 const struct net_bridge_port *port, 1412 struct net_bridge_vlan_group *vg, 1413 struct sk_buff *skb); 1414 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1415 bool *changed, struct netlink_ext_ack *extack); 1416 int br_vlan_delete(struct net_bridge *br, u16 vid); 1417 void br_vlan_flush(struct net_bridge *br); 1418 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1419 void br_recalculate_fwd_mask(struct net_bridge *br); 1420 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1421 struct netlink_ext_ack *extack); 1422 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1423 struct netlink_ext_ack *extack); 1424 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1425 struct netlink_ext_ack *extack); 1426 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1427 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1428 int br_vlan_init(struct net_bridge *br); 1429 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1430 struct netlink_ext_ack *extack); 1431 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1432 struct netlink_ext_ack *extack); 1433 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1434 bool *changed, struct netlink_ext_ack *extack); 1435 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1436 void nbp_vlan_flush(struct net_bridge_port *port); 1437 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1438 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1439 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1440 struct pcpu_sw_netstats *stats); 1441 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1442 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1443 void *ptr); 1444 void br_vlan_rtnl_init(void); 1445 void br_vlan_rtnl_uninit(void); 1446 void br_vlan_notify(const struct net_bridge *br, 1447 const struct net_bridge_port *p, 1448 u16 vid, u16 vid_range, 1449 int cmd); 1450 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 1451 const void *ctx, bool adding, struct notifier_block *nb, 1452 struct netlink_ext_ack *extack); 1453 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1454 const struct net_bridge_vlan *range_end); 1455 1456 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1457 struct net_device_path_ctx *ctx, 1458 struct net_device_path *path); 1459 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1460 struct net_bridge_port *dst, 1461 struct net_device_path *path); 1462 1463 static inline struct net_bridge_vlan_group *br_vlan_group( 1464 const struct net_bridge *br) 1465 { 1466 return rtnl_dereference(br->vlgrp); 1467 } 1468 1469 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1470 const struct net_bridge_port *p) 1471 { 1472 return rtnl_dereference(p->vlgrp); 1473 } 1474 1475 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1476 const struct net_bridge *br) 1477 { 1478 return rcu_dereference(br->vlgrp); 1479 } 1480 1481 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1482 const struct net_bridge_port *p) 1483 { 1484 return rcu_dereference(p->vlgrp); 1485 } 1486 1487 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1488 * skb, the vlan tag will always be present if the frame was tagged. 1489 */ 1490 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1491 { 1492 int err = 0; 1493 1494 if (skb_vlan_tag_present(skb)) { 1495 *vid = skb_vlan_tag_get_id(skb); 1496 } else { 1497 *vid = 0; 1498 err = -EINVAL; 1499 } 1500 1501 return err; 1502 } 1503 1504 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1505 { 1506 if (!vg) 1507 return 0; 1508 1509 smp_rmb(); 1510 return vg->pvid; 1511 } 1512 1513 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1514 { 1515 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1516 } 1517 #else 1518 static inline bool br_allowed_ingress(const struct net_bridge *br, 1519 struct net_bridge_vlan_group *vg, 1520 struct sk_buff *skb, 1521 u16 *vid, u8 *state, 1522 struct net_bridge_vlan **vlan) 1523 1524 { 1525 *vlan = NULL; 1526 return true; 1527 } 1528 1529 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1530 const struct sk_buff *skb) 1531 { 1532 return true; 1533 } 1534 1535 static inline bool br_should_learn(struct net_bridge_port *p, 1536 struct sk_buff *skb, u16 *vid) 1537 { 1538 return true; 1539 } 1540 1541 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1542 const struct net_bridge_port *port, 1543 struct net_bridge_vlan_group *vg, 1544 struct sk_buff *skb) 1545 { 1546 return skb; 1547 } 1548 1549 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1550 bool *changed, struct netlink_ext_ack *extack) 1551 { 1552 *changed = false; 1553 return -EOPNOTSUPP; 1554 } 1555 1556 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1557 { 1558 return -EOPNOTSUPP; 1559 } 1560 1561 static inline void br_vlan_flush(struct net_bridge *br) 1562 { 1563 } 1564 1565 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1566 { 1567 } 1568 1569 static inline int br_vlan_init(struct net_bridge *br) 1570 { 1571 return 0; 1572 } 1573 1574 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1575 bool *changed, struct netlink_ext_ack *extack) 1576 { 1577 *changed = false; 1578 return -EOPNOTSUPP; 1579 } 1580 1581 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1582 { 1583 return -EOPNOTSUPP; 1584 } 1585 1586 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1587 { 1588 } 1589 1590 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1591 u16 vid) 1592 { 1593 return NULL; 1594 } 1595 1596 static inline int nbp_vlan_init(struct net_bridge_port *port, 1597 struct netlink_ext_ack *extack) 1598 { 1599 return 0; 1600 } 1601 1602 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1603 { 1604 return 0; 1605 } 1606 1607 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1608 { 1609 return 0; 1610 } 1611 1612 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1613 unsigned long val, 1614 struct netlink_ext_ack *extack) 1615 { 1616 return -EOPNOTSUPP; 1617 } 1618 1619 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1620 u32 filter_mask) 1621 { 1622 return 0; 1623 } 1624 1625 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1626 struct net_device_path_ctx *ctx, 1627 struct net_device_path *path) 1628 { 1629 } 1630 1631 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1632 struct net_bridge_port *dst, 1633 struct net_device_path *path) 1634 { 1635 return 0; 1636 } 1637 1638 static inline struct net_bridge_vlan_group *br_vlan_group( 1639 const struct net_bridge *br) 1640 { 1641 return NULL; 1642 } 1643 1644 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1645 const struct net_bridge_port *p) 1646 { 1647 return NULL; 1648 } 1649 1650 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1651 const struct net_bridge *br) 1652 { 1653 return NULL; 1654 } 1655 1656 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1657 const struct net_bridge_port *p) 1658 { 1659 return NULL; 1660 } 1661 1662 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1663 struct pcpu_sw_netstats *stats) 1664 { 1665 } 1666 1667 static inline void br_vlan_port_event(struct net_bridge_port *p, 1668 unsigned long event) 1669 { 1670 } 1671 1672 static inline int br_vlan_bridge_event(struct net_device *dev, 1673 unsigned long event, void *ptr) 1674 { 1675 return 0; 1676 } 1677 1678 static inline void br_vlan_rtnl_init(void) 1679 { 1680 } 1681 1682 static inline void br_vlan_rtnl_uninit(void) 1683 { 1684 } 1685 1686 static inline void br_vlan_notify(const struct net_bridge *br, 1687 const struct net_bridge_port *p, 1688 u16 vid, u16 vid_range, 1689 int cmd) 1690 { 1691 } 1692 1693 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1694 const struct net_bridge_vlan *range_end) 1695 { 1696 return true; 1697 } 1698 1699 static inline int br_vlan_replay(struct net_device *br_dev, 1700 struct net_device *dev, const void *ctx, 1701 bool adding, struct notifier_block *nb, 1702 struct netlink_ext_ack *extack) 1703 { 1704 return -EOPNOTSUPP; 1705 } 1706 #endif 1707 1708 /* br_vlan_options.c */ 1709 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1710 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1711 const struct net_bridge_vlan *range_end); 1712 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v); 1713 size_t br_vlan_opts_nl_size(void); 1714 int br_vlan_process_options(const struct net_bridge *br, 1715 const struct net_bridge_port *p, 1716 struct net_bridge_vlan *range_start, 1717 struct net_bridge_vlan *range_end, 1718 struct nlattr **tb, 1719 struct netlink_ext_ack *extack); 1720 int br_vlan_rtm_process_global_options(struct net_device *dev, 1721 const struct nlattr *attr, 1722 int cmd, 1723 struct netlink_ext_ack *extack); 1724 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1725 const struct net_bridge_vlan *r_end); 1726 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1727 const struct net_bridge_vlan *v_opts); 1728 1729 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access */ 1730 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1731 { 1732 return READ_ONCE(v->state); 1733 } 1734 1735 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1736 { 1737 WRITE_ONCE(v->state, state); 1738 } 1739 1740 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1741 { 1742 return READ_ONCE(vg->pvid_state); 1743 } 1744 1745 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1746 u8 state) 1747 { 1748 WRITE_ONCE(vg->pvid_state, state); 1749 } 1750 1751 /* learn_allow is true at ingress and false at egress */ 1752 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1753 { 1754 switch (state) { 1755 case BR_STATE_LEARNING: 1756 return learn_allow; 1757 case BR_STATE_FORWARDING: 1758 return true; 1759 default: 1760 return false; 1761 } 1762 } 1763 #endif 1764 1765 struct nf_br_ops { 1766 int (*br_dev_xmit_hook)(struct sk_buff *skb); 1767 }; 1768 extern const struct nf_br_ops __rcu *nf_br_ops; 1769 1770 /* br_netfilter.c */ 1771 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 1772 int br_nf_core_init(void); 1773 void br_nf_core_fini(void); 1774 void br_netfilter_rtable_init(struct net_bridge *); 1775 #else 1776 static inline int br_nf_core_init(void) { return 0; } 1777 static inline void br_nf_core_fini(void) {} 1778 #define br_netfilter_rtable_init(x) 1779 #endif 1780 1781 /* br_stp.c */ 1782 void br_set_state(struct net_bridge_port *p, unsigned int state); 1783 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 1784 void br_init_port(struct net_bridge_port *p); 1785 void br_become_designated_port(struct net_bridge_port *p); 1786 1787 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 1788 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 1789 int br_set_hello_time(struct net_bridge *br, unsigned long x); 1790 int br_set_max_age(struct net_bridge *br, unsigned long x); 1791 int __set_ageing_time(struct net_device *dev, unsigned long t); 1792 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 1793 1794 1795 /* br_stp_if.c */ 1796 void br_stp_enable_bridge(struct net_bridge *br); 1797 void br_stp_disable_bridge(struct net_bridge *br); 1798 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 1799 struct netlink_ext_ack *extack); 1800 void br_stp_enable_port(struct net_bridge_port *p); 1801 void br_stp_disable_port(struct net_bridge_port *p); 1802 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 1803 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 1804 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 1805 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 1806 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 1807 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 1808 1809 /* br_stp_bpdu.c */ 1810 struct stp_proto; 1811 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 1812 struct net_device *dev); 1813 1814 /* br_stp_timer.c */ 1815 void br_stp_timer_init(struct net_bridge *br); 1816 void br_stp_port_timer_init(struct net_bridge_port *p); 1817 unsigned long br_timer_value(const struct timer_list *timer); 1818 1819 /* br.c */ 1820 #if IS_ENABLED(CONFIG_ATM_LANE) 1821 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 1822 #endif 1823 1824 /* br_mrp.c */ 1825 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 1826 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1827 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1828 bool br_mrp_enabled(struct net_bridge *br); 1829 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 1830 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 1831 #else 1832 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 1833 struct nlattr *attr, int cmd, 1834 struct netlink_ext_ack *extack) 1835 { 1836 return -EOPNOTSUPP; 1837 } 1838 1839 static inline bool br_mrp_enabled(struct net_bridge *br) 1840 { 1841 return false; 1842 } 1843 1844 static inline void br_mrp_port_del(struct net_bridge *br, 1845 struct net_bridge_port *p) 1846 { 1847 } 1848 1849 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 1850 { 1851 return 0; 1852 } 1853 1854 #endif 1855 1856 /* br_cfm.c */ 1857 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 1858 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1859 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 1860 bool br_cfm_created(struct net_bridge *br); 1861 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 1862 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 1863 int br_cfm_status_fill_info(struct sk_buff *skb, 1864 struct net_bridge *br, 1865 bool getlink); 1866 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 1867 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 1868 #else 1869 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 1870 struct nlattr *attr, int cmd, 1871 struct netlink_ext_ack *extack) 1872 { 1873 return -EOPNOTSUPP; 1874 } 1875 1876 static inline bool br_cfm_created(struct net_bridge *br) 1877 { 1878 return false; 1879 } 1880 1881 static inline void br_cfm_port_del(struct net_bridge *br, 1882 struct net_bridge_port *p) 1883 { 1884 } 1885 1886 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 1887 { 1888 return -EOPNOTSUPP; 1889 } 1890 1891 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 1892 struct net_bridge *br, 1893 bool getlink) 1894 { 1895 return -EOPNOTSUPP; 1896 } 1897 1898 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 1899 { 1900 return -EOPNOTSUPP; 1901 } 1902 1903 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 1904 { 1905 return -EOPNOTSUPP; 1906 } 1907 #endif 1908 1909 /* br_netlink.c */ 1910 extern struct rtnl_link_ops br_link_ops; 1911 int br_netlink_init(void); 1912 void br_netlink_fini(void); 1913 void br_ifinfo_notify(int event, const struct net_bridge *br, 1914 const struct net_bridge_port *port); 1915 void br_info_notify(int event, const struct net_bridge *br, 1916 const struct net_bridge_port *port, u32 filter); 1917 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 1918 struct netlink_ext_ack *extack); 1919 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 1920 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 1921 u32 filter_mask, int nlflags); 1922 int br_process_vlan_info(struct net_bridge *br, 1923 struct net_bridge_port *p, int cmd, 1924 struct bridge_vlan_info *vinfo_curr, 1925 struct bridge_vlan_info **vinfo_last, 1926 bool *changed, 1927 struct netlink_ext_ack *extack); 1928 1929 #ifdef CONFIG_SYSFS 1930 /* br_sysfs_if.c */ 1931 extern const struct sysfs_ops brport_sysfs_ops; 1932 int br_sysfs_addif(struct net_bridge_port *p); 1933 int br_sysfs_renameif(struct net_bridge_port *p); 1934 1935 /* br_sysfs_br.c */ 1936 int br_sysfs_addbr(struct net_device *dev); 1937 void br_sysfs_delbr(struct net_device *dev); 1938 1939 #else 1940 1941 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 1942 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 1943 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 1944 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 1945 #endif /* CONFIG_SYSFS */ 1946 1947 /* br_switchdev.c */ 1948 #ifdef CONFIG_NET_SWITCHDEV 1949 int br_switchdev_port_offload(struct net_bridge_port *p, 1950 struct net_device *dev, const void *ctx, 1951 struct notifier_block *atomic_nb, 1952 struct notifier_block *blocking_nb, 1953 bool tx_fwd_offload, 1954 struct netlink_ext_ack *extack); 1955 1956 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 1957 struct notifier_block *atomic_nb, 1958 struct notifier_block *blocking_nb); 1959 1960 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 1961 1962 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 1963 1964 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 1965 struct sk_buff *skb); 1966 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 1967 struct sk_buff *skb); 1968 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 1969 struct sk_buff *skb); 1970 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 1971 const struct sk_buff *skb); 1972 int br_switchdev_set_port_flag(struct net_bridge_port *p, 1973 unsigned long flags, 1974 unsigned long mask, 1975 struct netlink_ext_ack *extack); 1976 void br_switchdev_fdb_notify(struct net_bridge *br, 1977 const struct net_bridge_fdb_entry *fdb, int type); 1978 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 1979 struct netlink_ext_ack *extack); 1980 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 1981 void br_switchdev_init(struct net_bridge *br); 1982 1983 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 1984 { 1985 skb->offload_fwd_mark = 0; 1986 } 1987 #else 1988 static inline int 1989 br_switchdev_port_offload(struct net_bridge_port *p, 1990 struct net_device *dev, const void *ctx, 1991 struct notifier_block *atomic_nb, 1992 struct notifier_block *blocking_nb, 1993 bool tx_fwd_offload, 1994 struct netlink_ext_ack *extack) 1995 { 1996 return -EOPNOTSUPP; 1997 } 1998 1999 static inline void 2000 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2001 struct notifier_block *atomic_nb, 2002 struct notifier_block *blocking_nb) 2003 { 2004 } 2005 2006 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2007 { 2008 return false; 2009 } 2010 2011 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2012 { 2013 } 2014 2015 static inline void 2016 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2017 struct sk_buff *skb) 2018 { 2019 } 2020 2021 static inline void 2022 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2023 struct sk_buff *skb) 2024 { 2025 } 2026 2027 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2028 struct sk_buff *skb) 2029 { 2030 } 2031 2032 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2033 const struct sk_buff *skb) 2034 { 2035 return true; 2036 } 2037 2038 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2039 unsigned long flags, 2040 unsigned long mask, 2041 struct netlink_ext_ack *extack) 2042 { 2043 return 0; 2044 } 2045 2046 static inline int br_switchdev_port_vlan_add(struct net_device *dev, 2047 u16 vid, u16 flags, 2048 struct netlink_ext_ack *extack) 2049 { 2050 return -EOPNOTSUPP; 2051 } 2052 2053 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2054 { 2055 return -EOPNOTSUPP; 2056 } 2057 2058 static inline void 2059 br_switchdev_fdb_notify(struct net_bridge *br, 2060 const struct net_bridge_fdb_entry *fdb, int type) 2061 { 2062 } 2063 2064 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2065 { 2066 } 2067 2068 static inline void br_switchdev_init(struct net_bridge *br) 2069 { 2070 } 2071 2072 #endif /* CONFIG_NET_SWITCHDEV */ 2073 2074 /* br_arp_nd_proxy.c */ 2075 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2076 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2077 u16 vid, struct net_bridge_port *p); 2078 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2079 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2080 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m); 2081 #endif 2082