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 <net/pkt_cls.h> 19 #include <linux/if_vlan.h> 20 #include <linux/rhashtable.h> 21 #include <linux/refcount.h> 22 23 #define BR_HASH_BITS 8 24 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 25 26 #define BR_HOLD_TIME (1*HZ) 27 28 #define BR_PORT_BITS 10 29 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 30 31 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096 32 #define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000) 33 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN 34 #define BR_MULTICAST_QUERY_INTVL_MAX msecs_to_jiffies(86400000) /* 24 hours */ 35 #define BR_MULTICAST_STARTUP_QUERY_INTVL_MAX BR_MULTICAST_QUERY_INTVL_MAX 36 37 #define BR_HWDOM_MAX BITS_PER_LONG 38 39 #define BR_VERSION "2.3" 40 41 /* Control of forwarding link local multicast */ 42 #define BR_GROUPFWD_DEFAULT 0 43 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */ 44 enum { 45 BR_GROUPFWD_STP = BIT(0), 46 BR_GROUPFWD_MACPAUSE = BIT(1), 47 BR_GROUPFWD_LACP = BIT(2), 48 }; 49 50 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \ 51 BR_GROUPFWD_LACP) 52 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */ 53 #define BR_GROUPFWD_8021AD 0xB801u 54 55 /* Path to usermode spanning tree program */ 56 #define BR_STP_PROG "/sbin/bridge-stp" 57 58 #define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT) 59 60 typedef struct bridge_id bridge_id; 61 typedef struct mac_addr mac_addr; 62 typedef __u16 port_id; 63 64 struct bridge_id { 65 unsigned char prio[2]; 66 unsigned char addr[ETH_ALEN]; 67 }; 68 69 struct mac_addr { 70 unsigned char addr[ETH_ALEN]; 71 }; 72 73 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 74 /* our own querier */ 75 struct bridge_mcast_own_query { 76 struct timer_list timer; 77 u32 startup_sent; 78 }; 79 80 /* other querier */ 81 struct bridge_mcast_other_query { 82 struct timer_list timer; 83 struct timer_list delay_timer; 84 }; 85 86 /* selected querier */ 87 struct bridge_mcast_querier { 88 struct br_ip addr; 89 int port_ifidx; 90 seqcount_spinlock_t seq; 91 }; 92 93 /* IGMP/MLD statistics */ 94 struct bridge_mcast_stats { 95 struct br_mcast_stats mstats; 96 struct u64_stats_sync syncp; 97 }; 98 99 struct br_mdb_src_entry { 100 struct br_ip addr; 101 }; 102 103 struct br_mdb_config { 104 struct net_bridge *br; 105 struct net_bridge_port *p; 106 struct br_mdb_entry *entry; 107 struct br_ip group; 108 bool src_entry; 109 u8 filter_mode; 110 u16 nlflags; 111 struct br_mdb_src_entry *src_entries; 112 int num_src_entries; 113 u8 rt_protocol; 114 }; 115 #endif 116 117 /* net_bridge_mcast_port must be always defined due to forwarding stubs */ 118 struct net_bridge_mcast_port { 119 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 120 struct net_bridge_port *port; 121 struct net_bridge_vlan *vlan; 122 123 struct bridge_mcast_own_query ip4_own_query; 124 struct timer_list ip4_mc_router_timer; 125 struct hlist_node ip4_rlist; 126 #if IS_ENABLED(CONFIG_IPV6) 127 struct bridge_mcast_own_query ip6_own_query; 128 struct timer_list ip6_mc_router_timer; 129 struct hlist_node ip6_rlist; 130 #endif /* IS_ENABLED(CONFIG_IPV6) */ 131 unsigned char multicast_router; 132 u32 mdb_n_entries; 133 u32 mdb_max_entries; 134 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 135 }; 136 137 /* net_bridge_mcast must be always defined due to forwarding stubs */ 138 struct net_bridge_mcast { 139 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 140 struct net_bridge *br; 141 struct net_bridge_vlan *vlan; 142 143 u32 multicast_last_member_count; 144 u32 multicast_startup_query_count; 145 146 u8 multicast_querier; 147 u8 multicast_igmp_version; 148 u8 multicast_router; 149 #if IS_ENABLED(CONFIG_IPV6) 150 u8 multicast_mld_version; 151 #endif 152 unsigned long multicast_last_member_interval; 153 unsigned long multicast_membership_interval; 154 unsigned long multicast_querier_interval; 155 unsigned long multicast_query_interval; 156 unsigned long multicast_query_response_interval; 157 unsigned long multicast_startup_query_interval; 158 struct hlist_head ip4_mc_router_list; 159 struct timer_list ip4_mc_router_timer; 160 struct bridge_mcast_other_query ip4_other_query; 161 struct bridge_mcast_own_query ip4_own_query; 162 struct bridge_mcast_querier ip4_querier; 163 #if IS_ENABLED(CONFIG_IPV6) 164 struct hlist_head ip6_mc_router_list; 165 struct timer_list ip6_mc_router_timer; 166 struct bridge_mcast_other_query ip6_other_query; 167 struct bridge_mcast_own_query ip6_own_query; 168 struct bridge_mcast_querier ip6_querier; 169 #endif /* IS_ENABLED(CONFIG_IPV6) */ 170 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 171 }; 172 173 struct br_tunnel_info { 174 __be64 tunnel_id; 175 struct metadata_dst __rcu *tunnel_dst; 176 }; 177 178 /* private vlan flags */ 179 enum { 180 BR_VLFLAG_PER_PORT_STATS = BIT(0), 181 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 182 BR_VLFLAG_MCAST_ENABLED = BIT(2), 183 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 184 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4), 185 BR_VLFLAG_TAGGING_BY_SWITCHDEV = BIT(5), 186 }; 187 188 /** 189 * struct net_bridge_vlan - per-vlan entry 190 * 191 * @vnode: rhashtable member 192 * @tnode: rhashtable member 193 * @vid: VLAN id 194 * @flags: bridge vlan flags 195 * @priv_flags: private (in-kernel) bridge vlan flags 196 * @state: STP state (e.g. blocking, learning, forwarding) 197 * @stats: per-cpu VLAN statistics 198 * @br: if MASTER flag set, this points to a bridge struct 199 * @port: if MASTER flag unset, this points to a port struct 200 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 201 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 202 * for this VLAN entry 203 * @tinfo: bridge tunnel info 204 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 205 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 206 * context 207 * @msti: if MASTER flag set, this holds the VLANs MST instance 208 * @vlist: sorted list of VLAN entries 209 * @rcu: used for entry destruction 210 * 211 * This structure is shared between the global per-VLAN entries contained in 212 * the bridge rhashtable and the local per-port per-VLAN entries contained in 213 * the port's rhashtable. The union entries should be interpreted depending on 214 * the entry flags that are set. 215 */ 216 struct net_bridge_vlan { 217 struct rhash_head vnode; 218 struct rhash_head tnode; 219 u16 vid; 220 u16 flags; 221 u16 priv_flags; 222 u8 state; 223 struct pcpu_sw_netstats __percpu *stats; 224 union { 225 struct net_bridge *br; 226 struct net_bridge_port *port; 227 }; 228 union { 229 refcount_t refcnt; 230 struct net_bridge_vlan *brvlan; 231 }; 232 233 struct br_tunnel_info tinfo; 234 235 union { 236 struct net_bridge_mcast br_mcast_ctx; 237 struct net_bridge_mcast_port port_mcast_ctx; 238 }; 239 240 u16 msti; 241 242 struct list_head vlist; 243 244 struct rcu_head rcu; 245 }; 246 247 /** 248 * struct net_bridge_vlan_group 249 * 250 * @vlan_hash: VLAN entry rhashtable 251 * @tunnel_hash: Hash table to map from tunnel key ID (e.g. VXLAN VNI) to VLAN 252 * @vlan_list: sorted VLAN entry list 253 * @num_vlans: number of total VLAN entries 254 * @pvid: PVID VLAN id 255 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 256 * 257 * IMPORTANT: Be careful when checking if there're VLAN entries using list 258 * primitives because the bridge can have entries in its list which 259 * are just for global context but not for filtering, i.e. they have 260 * the master flag set but not the brentry flag. If you have to check 261 * if there're "real" entries in the bridge please test @num_vlans 262 */ 263 struct net_bridge_vlan_group { 264 struct rhashtable vlan_hash; 265 struct rhashtable tunnel_hash; 266 struct list_head vlan_list; 267 u16 num_vlans; 268 u16 pvid; 269 u8 pvid_state; 270 }; 271 272 /* bridge fdb flags */ 273 enum { 274 BR_FDB_LOCAL, 275 BR_FDB_STATIC, 276 BR_FDB_STICKY, 277 BR_FDB_ADDED_BY_USER, 278 BR_FDB_ADDED_BY_EXT_LEARN, 279 BR_FDB_OFFLOADED, 280 BR_FDB_NOTIFY, 281 BR_FDB_NOTIFY_INACTIVE, 282 BR_FDB_LOCKED, 283 BR_FDB_DYNAMIC_LEARNED, 284 }; 285 286 struct net_bridge_fdb_key { 287 mac_addr addr; 288 u16 vlan_id; 289 }; 290 291 struct net_bridge_fdb_entry { 292 struct rhash_head rhnode; 293 struct net_bridge_port *dst; 294 295 struct net_bridge_fdb_key key; 296 struct hlist_node fdb_node; 297 unsigned long flags; 298 299 /* write-heavy members should not affect lookups */ 300 unsigned long updated ____cacheline_aligned_in_smp; 301 unsigned long used; 302 303 struct rcu_head rcu; 304 }; 305 306 struct net_bridge_fdb_flush_desc { 307 unsigned long flags; 308 unsigned long flags_mask; 309 int port_ifindex; 310 u16 vlan_id; 311 }; 312 313 #define MDB_PG_FLAGS_PERMANENT BIT(0) 314 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 315 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 316 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 317 #define MDB_PG_FLAGS_BLOCKED BIT(4) 318 #define MDB_PG_FLAGS_OFFLOAD_FAILED BIT(5) 319 320 #define PG_SRC_ENT_LIMIT 32 321 322 #define BR_SGRP_F_DELETE BIT(0) 323 #define BR_SGRP_F_SEND BIT(1) 324 #define BR_SGRP_F_INSTALLED BIT(2) 325 #define BR_SGRP_F_USER_ADDED BIT(3) 326 327 struct net_bridge_mcast_gc { 328 struct hlist_node gc_node; 329 void (*destroy)(struct net_bridge_mcast_gc *gc); 330 }; 331 332 struct net_bridge_group_src { 333 struct hlist_node node; 334 335 struct br_ip addr; 336 struct net_bridge_port_group *pg; 337 u8 flags; 338 u8 src_query_rexmit_cnt; 339 struct timer_list timer; 340 341 struct net_bridge *br; 342 struct net_bridge_mcast_gc mcast_gc; 343 struct rcu_head rcu; 344 }; 345 346 struct net_bridge_port_group_sg_key { 347 struct net_bridge_port *port; 348 struct br_ip addr; 349 }; 350 351 struct net_bridge_port_group { 352 struct net_bridge_port_group __rcu *next; 353 struct net_bridge_port_group_sg_key key; 354 unsigned char eth_addr[ETH_ALEN] __aligned(2); 355 unsigned char flags; 356 unsigned char filter_mode; 357 unsigned char grp_query_rexmit_cnt; 358 unsigned char rt_protocol; 359 360 struct hlist_head src_list; 361 unsigned int src_ents; 362 struct timer_list timer; 363 struct timer_list rexmit_timer; 364 struct hlist_node mglist; 365 struct rb_root eht_set_tree; 366 struct rb_root eht_host_tree; 367 368 struct rhash_head rhnode; 369 struct net_bridge_mcast_gc mcast_gc; 370 struct rcu_head rcu; 371 }; 372 373 struct net_bridge_mdb_entry { 374 struct rhash_head rhnode; 375 struct net_bridge *br; 376 struct net_bridge_port_group __rcu *ports; 377 struct br_ip addr; 378 bool host_joined; 379 380 struct timer_list timer; 381 struct hlist_node mdb_node; 382 383 struct net_bridge_mcast_gc mcast_gc; 384 struct rcu_head rcu; 385 }; 386 387 struct net_bridge_port { 388 struct net_bridge *br; 389 struct net_device *dev; 390 netdevice_tracker dev_tracker; 391 struct list_head list; 392 393 unsigned long flags; 394 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 395 struct net_bridge_vlan_group __rcu *vlgrp; 396 #endif 397 struct net_bridge_port __rcu *backup_port; 398 u32 backup_nhid; 399 400 /* STP */ 401 u8 priority; 402 u8 state; 403 u16 port_no; 404 unsigned char topology_change_ack; 405 unsigned char config_pending; 406 port_id port_id; 407 port_id designated_port; 408 bridge_id designated_root; 409 bridge_id designated_bridge; 410 u32 path_cost; 411 u32 designated_cost; 412 unsigned long designated_age; 413 414 struct timer_list forward_delay_timer; 415 struct timer_list hold_timer; 416 struct timer_list message_age_timer; 417 struct kobject kobj; 418 struct rcu_head rcu; 419 420 struct net_bridge_mcast_port multicast_ctx; 421 422 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 423 struct bridge_mcast_stats __percpu *mcast_stats; 424 425 u32 multicast_eht_hosts_limit; 426 u32 multicast_eht_hosts_cnt; 427 struct hlist_head mglist; 428 #endif 429 430 #ifdef CONFIG_SYSFS 431 char sysfs_name[IFNAMSIZ]; 432 #endif 433 434 #ifdef CONFIG_NET_POLL_CONTROLLER 435 struct netpoll *np; 436 #endif 437 #ifdef CONFIG_NET_SWITCHDEV 438 /* Identifier used to group ports that share the same switchdev 439 * hardware domain. 440 */ 441 int hwdom; 442 int offload_count; 443 struct netdev_phys_item_id ppid; 444 #endif 445 u16 group_fwd_mask; 446 u16 backup_redirected_cnt; 447 448 struct bridge_stp_xstats stp_xstats; 449 }; 450 451 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 452 453 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 454 #define br_promisc_port(p) ((p)->flags & BR_PROMISC) 455 456 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 457 { 458 return rcu_dereference(dev->rx_handler_data); 459 } 460 461 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 462 { 463 return netif_is_bridge_port(dev) ? 464 rtnl_dereference(dev->rx_handler_data) : NULL; 465 } 466 467 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 468 { 469 return netif_is_bridge_port(dev) ? 470 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 471 } 472 473 enum net_bridge_opts { 474 BROPT_VLAN_ENABLED, 475 BROPT_VLAN_STATS_ENABLED, 476 BROPT_NF_CALL_IPTABLES, 477 BROPT_NF_CALL_IP6TABLES, 478 BROPT_NF_CALL_ARPTABLES, 479 BROPT_GROUP_ADDR_SET, 480 BROPT_MULTICAST_ENABLED, 481 BROPT_MULTICAST_QUERY_USE_IFADDR, 482 BROPT_MULTICAST_STATS_ENABLED, 483 BROPT_HAS_IPV6_ADDR, 484 BROPT_NEIGH_SUPPRESS_ENABLED, 485 BROPT_MTU_SET_BY_USER, 486 BROPT_VLAN_STATS_PER_PORT, 487 BROPT_NO_LL_LEARN, 488 BROPT_VLAN_BRIDGE_BINDING, 489 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 490 BROPT_MST_ENABLED, 491 BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION, 492 BROPT_FDB_LOCAL_VLAN_0, 493 }; 494 495 struct net_bridge { 496 spinlock_t lock; 497 spinlock_t hash_lock; 498 struct hlist_head frame_type_list; 499 struct net_device *dev; 500 unsigned long options; 501 /* These fields are accessed on each packet */ 502 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 503 __be16 vlan_proto; 504 u16 default_pvid; 505 struct net_bridge_vlan_group __rcu *vlgrp; 506 #endif 507 508 struct rhashtable fdb_hash_tbl; 509 struct list_head port_list; 510 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 511 union { 512 struct rtable fake_rtable; 513 struct rt6_info fake_rt6_info; 514 }; 515 u32 metrics[RTAX_MAX]; 516 #endif 517 u16 group_fwd_mask; 518 u16 group_fwd_mask_required; 519 520 /* STP */ 521 bridge_id designated_root; 522 bridge_id bridge_id; 523 unsigned char topology_change; 524 unsigned char topology_change_detected; 525 u16 root_port; 526 u8 stp_mode; 527 bool stp_helper_active; 528 unsigned long max_age; 529 unsigned long hello_time; 530 unsigned long forward_delay; 531 unsigned long ageing_time; 532 unsigned long bridge_max_age; 533 unsigned long bridge_hello_time; 534 unsigned long bridge_forward_delay; 535 unsigned long bridge_ageing_time; 536 u32 root_path_cost; 537 538 u8 group_addr[ETH_ALEN]; 539 540 enum { 541 BR_NO_STP, /* no spanning tree */ 542 BR_KERNEL_STP, /* old STP in kernel */ 543 BR_USER_STP, /* new RSTP in userspace */ 544 } stp_enabled; 545 546 struct net_bridge_mcast multicast_ctx; 547 548 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 549 struct bridge_mcast_stats __percpu *mcast_stats; 550 551 u32 hash_max; 552 553 spinlock_t multicast_lock; 554 555 struct rhashtable mdb_hash_tbl; 556 struct rhashtable sg_port_tbl; 557 558 struct hlist_head mcast_gc_list; 559 struct hlist_head mdb_list; 560 561 struct work_struct mcast_gc_work; 562 #endif 563 564 struct timer_list hello_timer; 565 struct timer_list tcn_timer; 566 struct timer_list topology_change_timer; 567 struct delayed_work gc_work; 568 struct kobject *ifobj; 569 u32 auto_cnt; 570 571 atomic_t fdb_n_learned; 572 u32 fdb_max_learned; 573 574 #ifdef CONFIG_NET_SWITCHDEV 575 /* Counter used to make sure that hardware domains get unique 576 * identifiers in case a bridge spans multiple switchdev instances. 577 */ 578 int last_hwdom; 579 /* Bit mask of hardware domain numbers in use */ 580 unsigned long busy_hwdoms; 581 #endif 582 struct hlist_head fdb_list; 583 584 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 585 struct hlist_head mrp_list; 586 #endif 587 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 588 struct hlist_head mep_list; 589 #endif 590 }; 591 592 struct br_input_skb_cb { 593 struct net_device *brdev; 594 595 u16 frag_max_size; 596 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 597 u8 igmp; 598 u8 mrouters_only:1; 599 #endif 600 u8 proxyarp_replied:1; 601 u8 src_port_isolated:1; 602 u8 promisc:1; 603 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 604 u8 vlan_filtered:1; 605 #endif 606 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 607 u8 br_netfilter_broute:1; 608 #endif 609 610 #ifdef CONFIG_NET_SWITCHDEV 611 /* Set if TX data plane offloading is used towards at least one 612 * hardware domain. 613 */ 614 u8 tx_fwd_offload:1; 615 /* The switchdev hardware domain from which this packet was received. 616 * If skb->offload_fwd_mark was set, then this packet was already 617 * forwarded by hardware to the other ports in the source hardware 618 * domain, otherwise it wasn't. 619 */ 620 int src_hwdom; 621 /* Bit mask of hardware domains towards this packet has already been 622 * transmitted using the TX data plane offload. 623 */ 624 unsigned long fwd_hwdoms; 625 #endif 626 627 u32 backup_nhid; 628 }; 629 630 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 631 632 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 633 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 634 #else 635 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 636 #endif 637 638 #define br_printk(level, br, format, args...) \ 639 printk(level "%s: " format, (br)->dev->name, ##args) 640 641 #define br_err(__br, format, args...) \ 642 br_printk(KERN_ERR, __br, format, ##args) 643 #define br_warn(__br, format, args...) \ 644 br_printk(KERN_WARNING, __br, format, ##args) 645 #define br_notice(__br, format, args...) \ 646 br_printk(KERN_NOTICE, __br, format, ##args) 647 #define br_info(__br, format, args...) \ 648 br_printk(KERN_INFO, __br, format, ##args) 649 650 #define br_debug(br, format, args...) \ 651 pr_debug("%s: " format, (br)->dev->name, ##args) 652 653 /* called under bridge lock */ 654 static inline int br_is_root_bridge(const struct net_bridge *br) 655 { 656 return !memcmp(&br->bridge_id, &br->designated_root, 8); 657 } 658 659 /* check if a VLAN entry is global */ 660 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 661 { 662 return v->flags & BRIDGE_VLAN_INFO_MASTER; 663 } 664 665 /* check if a VLAN entry is used by the bridge */ 666 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 667 { 668 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 669 } 670 671 /* check if we should use the vlan entry, returns false if it's only context */ 672 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 673 { 674 if (br_vlan_is_master(v)) { 675 if (br_vlan_is_brentry(v)) 676 return true; 677 else 678 return false; 679 } 680 681 return true; 682 } 683 684 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 685 { 686 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 687 } 688 689 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 690 { 691 bool ret = vid > 0 && vid < VLAN_VID_MASK; 692 693 if (!ret) 694 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 695 696 return ret; 697 } 698 699 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 700 const struct bridge_vlan_info *last, 701 struct netlink_ext_ack *extack) 702 { 703 /* pvid flag is not allowed in ranges */ 704 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 705 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 706 return false; 707 } 708 709 /* when cur is the range end, check if: 710 * - it has range start flag 711 * - range ids are invalid (end is equal to or before start) 712 */ 713 if (last) { 714 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 715 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 716 return false; 717 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 718 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 719 return false; 720 } else if (cur->vid <= last->vid) { 721 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 722 return false; 723 } 724 } 725 726 /* check for required range flags */ 727 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 728 BRIDGE_VLAN_INFO_RANGE_END))) { 729 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 730 return false; 731 } 732 733 return true; 734 } 735 736 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 737 { 738 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 739 740 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 741 if (!br_vlan_is_master(v)) 742 mcast_router = v->port_mcast_ctx.multicast_router; 743 else 744 mcast_router = v->br_mcast_ctx.multicast_router; 745 #endif 746 747 return mcast_router; 748 } 749 750 static inline int br_afspec_cmd_to_rtm(int cmd) 751 { 752 switch (cmd) { 753 case RTM_SETLINK: 754 return RTM_NEWVLAN; 755 case RTM_DELLINK: 756 return RTM_DELVLAN; 757 } 758 759 return 0; 760 } 761 762 static inline int br_opt_get(const struct net_bridge *br, 763 enum net_bridge_opts opt) 764 { 765 return test_bit(opt, &br->options); 766 } 767 768 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 769 struct netlink_ext_ack *extack); 770 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 771 int br_boolopt_multi_toggle(struct net_bridge *br, 772 struct br_boolopt_multi *bm, 773 struct netlink_ext_ack *extack); 774 void br_boolopt_multi_get(const struct net_bridge *br, 775 struct br_boolopt_multi *bm); 776 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 777 778 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 779 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 780 { 781 struct tc_skb_ext *ext; 782 783 if (!tc_skb_ext_tc_enabled()) 784 return; 785 786 ext = skb_ext_find(skb, TC_SKB_EXT); 787 if (ext) { 788 ext->l2_miss = miss; 789 return; 790 } 791 if (!miss) 792 return; 793 ext = tc_skb_ext_alloc(skb); 794 if (!ext) 795 return; 796 ext->l2_miss = true; 797 } 798 #else 799 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 800 { 801 } 802 #endif 803 804 /* br_device.c */ 805 void br_dev_setup(struct net_device *dev); 806 void br_dev_delete(struct net_device *dev, struct list_head *list); 807 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 808 #ifdef CONFIG_NET_POLL_CONTROLLER 809 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 810 struct sk_buff *skb) 811 { 812 netpoll_send_skb(p->np, skb); 813 } 814 815 int br_netpoll_enable(struct net_bridge_port *p); 816 void br_netpoll_disable(struct net_bridge_port *p); 817 #else 818 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 819 struct sk_buff *skb) 820 { 821 } 822 823 static inline int br_netpoll_enable(struct net_bridge_port *p) 824 { 825 return 0; 826 } 827 828 static inline void br_netpoll_disable(struct net_bridge_port *p) 829 { 830 } 831 #endif 832 833 /* br_fdb.c */ 834 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 835 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 836 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 837 NTF_STICKY | NTF_OFFLOADED) 838 839 int br_fdb_init(void); 840 void br_fdb_fini(void); 841 int br_fdb_hash_init(struct net_bridge *br); 842 void br_fdb_hash_fini(struct net_bridge *br); 843 void br_fdb_flush(struct net_bridge *br, 844 const struct net_bridge_fdb_flush_desc *desc); 845 void br_fdb_find_delete_local(struct net_bridge *br, 846 const struct net_bridge_port *p, 847 const unsigned char *addr, u16 vid); 848 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 849 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 850 void br_fdb_cleanup(struct work_struct *work); 851 int br_fdb_toggle_local_vlan_0(struct net_bridge *br, bool on, 852 struct netlink_ext_ack *extack); 853 void br_fdb_delete_by_port(struct net_bridge *br, 854 const struct net_bridge_port *p, u16 vid, int do_all); 855 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 856 const unsigned char *addr, 857 __u16 vid); 858 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 859 unsigned long off); 860 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 861 const unsigned char *addr, u16 vid); 862 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 863 const unsigned char *addr, u16 vid, unsigned long flags); 864 865 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 866 struct net_device *dev, const unsigned char *addr, u16 vid, 867 bool *notified, struct netlink_ext_ack *extack); 868 int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev, 869 struct netlink_ext_ack *extack); 870 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 871 const unsigned char *addr, u16 vid, u16 nlh_flags, 872 bool *notified, struct netlink_ext_ack *extack); 873 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 874 struct net_device *dev, struct net_device *fdev, int *idx); 875 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 876 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 877 struct netlink_ext_ack *extack); 878 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 879 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 880 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 881 const unsigned char *addr, u16 vid, 882 bool locked, bool swdev_notify); 883 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 884 const unsigned char *addr, u16 vid, 885 bool swdev_notify); 886 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 887 const unsigned char *addr, u16 vid, bool offloaded); 888 889 /* br_forward.c */ 890 enum br_pkt_type { 891 BR_PKT_UNICAST, 892 BR_PKT_MULTICAST, 893 BR_PKT_BROADCAST 894 }; 895 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 896 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 897 bool local_rcv, bool local_orig); 898 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 899 void br_flood(struct net_bridge *br, struct sk_buff *skb, 900 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig, 901 u16 vid); 902 903 /* return true if both source port and dest port are isolated */ 904 static inline bool br_skb_isolated(const struct net_bridge_port *to, 905 const struct sk_buff *skb) 906 { 907 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 908 (to->flags & BR_ISOLATED); 909 } 910 911 /* br_if.c */ 912 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 913 int br_add_bridge(struct net *net, const char *name); 914 int br_del_bridge(struct net *net, const char *name); 915 int br_add_if(struct net_bridge *br, struct net_device *dev, 916 struct netlink_ext_ack *extack); 917 int br_del_if(struct net_bridge *br, struct net_device *dev); 918 void br_mtu_auto_adjust(struct net_bridge *br); 919 netdev_features_t br_features_recompute(struct net_bridge *br, 920 netdev_features_t features); 921 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 922 void br_manage_promisc(struct net_bridge *br); 923 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 924 925 /* br_input.c */ 926 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 927 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 928 929 struct br_frame_type { 930 __be16 type; 931 int (*frame_handler)(struct net_bridge_port *port, 932 struct sk_buff *skb); 933 struct hlist_node list; 934 }; 935 936 void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); 937 void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); 938 939 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 940 { 941 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 942 } 943 944 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 945 { 946 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 947 } 948 949 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 950 { 951 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 952 } 953 954 static inline struct net_bridge_port * 955 br_port_get_check_rtnl(const struct net_device *dev) 956 { 957 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 958 } 959 960 /* br_ioctl.c */ 961 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 962 void __user *data, int cmd); 963 int br_ioctl_stub(struct net *net, unsigned int cmd, void __user *uarg); 964 965 /* br_multicast.c */ 966 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 967 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 968 struct net_bridge_mcast_port **pmctx, 969 struct net_bridge_vlan *vlan, 970 struct sk_buff *skb, u16 vid); 971 struct net_bridge_mdb_entry * 972 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 973 u16 vid); 974 int br_multicast_add_port(struct net_bridge_port *port); 975 void br_multicast_del_port(struct net_bridge_port *port); 976 void br_multicast_enable_port(struct net_bridge_port *port); 977 void br_multicast_disable_port(struct net_bridge_port *port); 978 void br_multicast_init(struct net_bridge *br); 979 void br_multicast_join_snoopers(struct net_bridge *br); 980 void br_multicast_leave_snoopers(struct net_bridge *br); 981 void br_multicast_open(struct net_bridge *br); 982 void br_multicast_stop(struct net_bridge *br); 983 void br_multicast_dev_del(struct net_bridge *br); 984 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 985 struct net_bridge_mcast *brmctx, 986 bool local_rcv, bool local_orig); 987 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 988 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 989 unsigned long val); 990 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 991 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 992 struct netlink_ext_ack *extack); 993 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 994 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 995 unsigned long val); 996 #if IS_ENABLED(CONFIG_IPV6) 997 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 998 unsigned long val); 999 #endif 1000 struct net_bridge_mdb_entry * 1001 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 1002 struct net_bridge_mdb_entry * 1003 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 1004 struct net_bridge_port_group * 1005 br_multicast_new_port_group(struct net_bridge_port *port, 1006 const struct br_ip *group, 1007 struct net_bridge_port_group __rcu *next, 1008 unsigned char flags, const unsigned char *src, 1009 u8 filter_mode, u8 rt_protocol, 1010 struct netlink_ext_ack *extack); 1011 void br_multicast_del_port_group(struct net_bridge_port_group *p); 1012 int br_mdb_hash_init(struct net_bridge *br); 1013 void br_mdb_hash_fini(struct net_bridge *br); 1014 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1015 struct net_bridge_port_group *pg, int type); 1016 void br_mdb_flag_change_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1017 struct net_bridge_port_group *pg); 1018 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 1019 int type); 1020 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 1021 struct net_bridge_port_group *pg, 1022 struct net_bridge_port_group __rcu **pp); 1023 void br_multicast_count(struct net_bridge *br, 1024 const struct net_bridge_port *p, 1025 const struct sk_buff *skb, u8 type, u8 dir); 1026 int br_multicast_init_stats(struct net_bridge *br); 1027 void br_multicast_uninit_stats(struct net_bridge *br); 1028 void br_multicast_get_stats(const struct net_bridge *br, 1029 const struct net_bridge_port *p, 1030 struct br_mcast_stats *dest); 1031 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 1032 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 1033 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 1034 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 1035 struct netlink_ext_ack *extack); 1036 int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1037 struct netlink_ext_ack *extack); 1038 int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1039 struct netlink_ext_ack *extack); 1040 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1041 struct netlink_callback *cb); 1042 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq, 1043 struct netlink_ext_ack *extack); 1044 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 1045 struct net_bridge_mdb_entry *mp, bool notify); 1046 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 1047 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 1048 u8 filter_mode); 1049 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 1050 struct net_bridge_port_group *sg); 1051 struct net_bridge_group_src * 1052 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1053 struct net_bridge_group_src * 1054 br_multicast_new_group_src(struct net_bridge_port_group *pg, 1055 struct br_ip *src_ip); 1056 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1057 void br_multicast_del_group_src(struct net_bridge_group_src *src, 1058 bool fastleave); 1059 void br_multicast_ctx_init(struct net_bridge *br, 1060 struct net_bridge_vlan *vlan, 1061 struct net_bridge_mcast *brmctx); 1062 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1063 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1064 struct net_bridge_vlan *vlan, 1065 struct net_bridge_mcast_port *pmctx); 1066 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1067 void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, u8 state); 1068 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1069 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1070 struct netlink_ext_ack *extack); 1071 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1072 1073 int br_rports_fill_info(struct sk_buff *skb, 1074 const struct net_bridge_mcast *brmctx); 1075 int br_multicast_dump_querier_state(struct sk_buff *skb, 1076 const struct net_bridge_mcast *brmctx, 1077 int nest_attr); 1078 size_t br_multicast_querier_state_size(void); 1079 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1080 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1081 unsigned long val); 1082 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1083 unsigned long val); 1084 1085 static inline bool br_group_is_l2(const struct br_ip *group) 1086 { 1087 return group->proto == 0; 1088 } 1089 1090 #define mlock_dereference(X, br) \ 1091 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1092 1093 static inline struct hlist_node * 1094 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1095 struct sk_buff *skb) 1096 { 1097 #if IS_ENABLED(CONFIG_IPV6) 1098 if (skb->protocol == htons(ETH_P_IPV6)) 1099 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1100 #endif 1101 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1102 } 1103 1104 static inline struct net_bridge_port * 1105 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1106 { 1107 struct net_bridge_mcast_port *mctx; 1108 1109 #if IS_ENABLED(CONFIG_IPV6) 1110 if (skb->protocol == htons(ETH_P_IPV6)) 1111 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1112 ip6_rlist); 1113 else 1114 #endif 1115 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1116 ip4_rlist); 1117 1118 if (mctx) 1119 return mctx->port; 1120 else 1121 return NULL; 1122 } 1123 1124 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1125 { 1126 return timer_pending(&brmctx->ip4_mc_router_timer); 1127 } 1128 1129 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1130 { 1131 #if IS_ENABLED(CONFIG_IPV6) 1132 return timer_pending(&brmctx->ip6_mc_router_timer); 1133 #else 1134 return false; 1135 #endif 1136 } 1137 1138 static inline bool 1139 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1140 { 1141 switch (brmctx->multicast_router) { 1142 case MDB_RTR_TYPE_PERM: 1143 return true; 1144 case MDB_RTR_TYPE_TEMP_QUERY: 1145 if (skb) { 1146 if (skb->protocol == htons(ETH_P_IP)) 1147 return br_ip4_multicast_is_router(brmctx); 1148 else if (skb->protocol == htons(ETH_P_IPV6)) 1149 return br_ip6_multicast_is_router(brmctx); 1150 } else { 1151 return br_ip4_multicast_is_router(brmctx) || 1152 br_ip6_multicast_is_router(brmctx); 1153 } 1154 fallthrough; 1155 default: 1156 return false; 1157 } 1158 } 1159 1160 static inline bool 1161 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1162 struct bridge_mcast_other_query *querier, 1163 const bool is_ipv6) 1164 { 1165 bool own_querier_enabled; 1166 1167 if (brmctx->multicast_querier) { 1168 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1169 own_querier_enabled = false; 1170 else 1171 own_querier_enabled = true; 1172 } else { 1173 own_querier_enabled = false; 1174 } 1175 1176 return !timer_pending(&querier->delay_timer) && 1177 (own_querier_enabled || timer_pending(&querier->timer)); 1178 } 1179 1180 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1181 struct ethhdr *eth, 1182 const struct net_bridge_mdb_entry *mdb) 1183 { 1184 switch (eth->h_proto) { 1185 case (htons(ETH_P_IP)): 1186 return __br_multicast_querier_exists(brmctx, 1187 &brmctx->ip4_other_query, false); 1188 #if IS_ENABLED(CONFIG_IPV6) 1189 case (htons(ETH_P_IPV6)): 1190 return __br_multicast_querier_exists(brmctx, 1191 &brmctx->ip6_other_query, true); 1192 #endif 1193 default: 1194 return !!mdb && br_group_is_l2(&mdb->addr); 1195 } 1196 } 1197 1198 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1199 { 1200 switch (ip->proto) { 1201 case htons(ETH_P_IP): 1202 return ipv4_is_zeronet(ip->src.ip4); 1203 #if IS_ENABLED(CONFIG_IPV6) 1204 case htons(ETH_P_IPV6): 1205 return ipv6_addr_any(&ip->src.ip6); 1206 #endif 1207 default: 1208 return false; 1209 } 1210 } 1211 1212 static inline bool 1213 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1214 __be16 proto) 1215 { 1216 switch (proto) { 1217 case htons(ETH_P_IP): 1218 return !!(brmctx->multicast_igmp_version == 3); 1219 #if IS_ENABLED(CONFIG_IPV6) 1220 case htons(ETH_P_IPV6): 1221 return !!(brmctx->multicast_mld_version == 2); 1222 #endif 1223 default: 1224 return false; 1225 } 1226 } 1227 1228 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1229 { 1230 return BR_INPUT_SKB_CB(skb)->igmp; 1231 } 1232 1233 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1234 { 1235 return brmctx->multicast_last_member_interval * 1236 brmctx->multicast_last_member_count; 1237 } 1238 1239 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1240 { 1241 return brmctx->multicast_membership_interval; 1242 } 1243 1244 static inline bool 1245 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1246 { 1247 return !!brmctx->vlan; 1248 } 1249 1250 static inline bool 1251 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1252 { 1253 return !!pmctx->vlan; 1254 } 1255 1256 static inline struct net_bridge_mcast * 1257 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1258 { 1259 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1260 return &pmctx->port->br->multicast_ctx; 1261 else 1262 return &pmctx->vlan->brvlan->br_mcast_ctx; 1263 } 1264 1265 static inline bool 1266 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1267 { 1268 return br_multicast_ctx_is_vlan(brmctx) && 1269 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1270 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1271 } 1272 1273 static inline bool 1274 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1275 { 1276 return br_multicast_ctx_is_vlan(brmctx) && 1277 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1278 } 1279 1280 static inline bool 1281 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1282 { 1283 return br_multicast_port_ctx_is_vlan(pmctx) && 1284 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1285 } 1286 1287 static inline bool 1288 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1289 { 1290 return pmctx->port->state == BR_STATE_DISABLED || 1291 (br_multicast_port_ctx_is_vlan(pmctx) && 1292 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1293 pmctx->vlan->state == BR_STATE_DISABLED)); 1294 } 1295 1296 static inline bool 1297 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1298 { 1299 return br_multicast_port_ctx_state_disabled(pmctx) || 1300 pmctx->port->state == BR_STATE_BLOCKING || 1301 (br_multicast_port_ctx_is_vlan(pmctx) && 1302 pmctx->vlan->state == BR_STATE_BLOCKING); 1303 } 1304 1305 static inline bool 1306 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1307 { 1308 #if IS_ENABLED(CONFIG_IPV6) 1309 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1310 !hlist_empty(&brmctx->ip6_mc_router_list); 1311 #else 1312 return !hlist_empty(&brmctx->ip4_mc_router_list); 1313 #endif 1314 } 1315 1316 static inline bool 1317 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1318 const struct net_bridge_mcast *brmctx2) 1319 { 1320 return brmctx1->multicast_igmp_version == 1321 brmctx2->multicast_igmp_version && 1322 brmctx1->multicast_last_member_count == 1323 brmctx2->multicast_last_member_count && 1324 brmctx1->multicast_startup_query_count == 1325 brmctx2->multicast_startup_query_count && 1326 brmctx1->multicast_last_member_interval == 1327 brmctx2->multicast_last_member_interval && 1328 brmctx1->multicast_membership_interval == 1329 brmctx2->multicast_membership_interval && 1330 brmctx1->multicast_querier_interval == 1331 brmctx2->multicast_querier_interval && 1332 brmctx1->multicast_query_interval == 1333 brmctx2->multicast_query_interval && 1334 brmctx1->multicast_query_response_interval == 1335 brmctx2->multicast_query_response_interval && 1336 brmctx1->multicast_startup_query_interval == 1337 brmctx2->multicast_startup_query_interval && 1338 brmctx1->multicast_querier == brmctx2->multicast_querier && 1339 brmctx1->multicast_router == brmctx2->multicast_router && 1340 !br_rports_have_mc_router(brmctx1) && 1341 !br_rports_have_mc_router(brmctx2) && 1342 #if IS_ENABLED(CONFIG_IPV6) 1343 brmctx1->multicast_mld_version == 1344 brmctx2->multicast_mld_version && 1345 #endif 1346 true; 1347 } 1348 1349 static inline bool 1350 br_multicast_port_ctx_options_equal(const struct net_bridge_mcast_port *pmctx1, 1351 const struct net_bridge_mcast_port *pmctx2) 1352 { 1353 return br_multicast_ngroups_get(pmctx1) == 1354 br_multicast_ngroups_get(pmctx2) && 1355 br_multicast_ngroups_get_max(pmctx1) == 1356 br_multicast_ngroups_get_max(pmctx2); 1357 } 1358 1359 static inline bool 1360 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1361 { 1362 bool vlan_snooping_enabled; 1363 1364 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1365 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1366 1367 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1368 } 1369 1370 static inline void 1371 br_multicast_set_pg_offload_flags(struct net_bridge_port_group *p, 1372 bool offloaded) 1373 { 1374 p->flags &= ~(MDB_PG_FLAGS_OFFLOAD | MDB_PG_FLAGS_OFFLOAD_FAILED); 1375 p->flags |= (offloaded ? MDB_PG_FLAGS_OFFLOAD : 1376 MDB_PG_FLAGS_OFFLOAD_FAILED); 1377 } 1378 1379 static inline bool 1380 br_mdb_should_notify(const struct net_bridge *br, u8 changed_flags) 1381 { 1382 return br_opt_get(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION) && 1383 (changed_flags & MDB_PG_FLAGS_OFFLOAD_FAILED); 1384 } 1385 #else 1386 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1387 struct net_bridge_mcast_port **pmctx, 1388 struct net_bridge_vlan *vlan, 1389 struct sk_buff *skb, 1390 u16 vid) 1391 { 1392 return 0; 1393 } 1394 1395 static inline struct net_bridge_mdb_entry * 1396 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 1397 u16 vid) 1398 { 1399 return NULL; 1400 } 1401 1402 static inline int br_multicast_add_port(struct net_bridge_port *port) 1403 { 1404 return 0; 1405 } 1406 1407 static inline void br_multicast_del_port(struct net_bridge_port *port) 1408 { 1409 } 1410 1411 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1412 { 1413 } 1414 1415 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1416 { 1417 } 1418 1419 static inline void br_multicast_init(struct net_bridge *br) 1420 { 1421 } 1422 1423 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1424 { 1425 } 1426 1427 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1428 { 1429 } 1430 1431 static inline void br_multicast_open(struct net_bridge *br) 1432 { 1433 } 1434 1435 static inline void br_multicast_stop(struct net_bridge *br) 1436 { 1437 } 1438 1439 static inline void br_multicast_dev_del(struct net_bridge *br) 1440 { 1441 } 1442 1443 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1444 struct sk_buff *skb, 1445 struct net_bridge_mcast *brmctx, 1446 bool local_rcv, bool local_orig) 1447 { 1448 } 1449 1450 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1451 struct sk_buff *skb) 1452 { 1453 return false; 1454 } 1455 1456 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1457 struct ethhdr *eth, 1458 const struct net_bridge_mdb_entry *mdb) 1459 { 1460 return false; 1461 } 1462 1463 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1464 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1465 { 1466 return -EOPNOTSUPP; 1467 } 1468 1469 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1470 struct netlink_ext_ack *extack) 1471 { 1472 return -EOPNOTSUPP; 1473 } 1474 1475 static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1476 struct netlink_ext_ack *extack) 1477 { 1478 return -EOPNOTSUPP; 1479 } 1480 1481 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1482 struct netlink_callback *cb) 1483 { 1484 return 0; 1485 } 1486 1487 static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[], 1488 u32 portid, u32 seq, 1489 struct netlink_ext_ack *extack) 1490 { 1491 return -EOPNOTSUPP; 1492 } 1493 1494 static inline int br_mdb_hash_init(struct net_bridge *br) 1495 { 1496 return 0; 1497 } 1498 1499 static inline void br_mdb_hash_fini(struct net_bridge *br) 1500 { 1501 } 1502 1503 static inline void br_multicast_count(struct net_bridge *br, 1504 const struct net_bridge_port *p, 1505 const struct sk_buff *skb, 1506 u8 type, u8 dir) 1507 { 1508 } 1509 1510 static inline int br_multicast_init_stats(struct net_bridge *br) 1511 { 1512 return 0; 1513 } 1514 1515 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1516 { 1517 } 1518 1519 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1520 { 1521 return 0; 1522 } 1523 1524 static inline void br_multicast_ctx_init(struct net_bridge *br, 1525 struct net_bridge_vlan *vlan, 1526 struct net_bridge_mcast *brmctx) 1527 { 1528 } 1529 1530 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1531 { 1532 } 1533 1534 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1535 struct net_bridge_vlan *vlan, 1536 struct net_bridge_mcast_port *pmctx) 1537 { 1538 } 1539 1540 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1541 { 1542 } 1543 1544 static inline void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, 1545 u8 state) 1546 { 1547 } 1548 1549 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1550 bool on) 1551 { 1552 } 1553 1554 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1555 bool on, 1556 struct netlink_ext_ack *extack) 1557 { 1558 return -EOPNOTSUPP; 1559 } 1560 1561 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1562 bool on) 1563 { 1564 return false; 1565 } 1566 1567 static inline bool 1568 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1569 const struct net_bridge_mcast *brmctx2) 1570 { 1571 return true; 1572 } 1573 #endif 1574 1575 /* br_vlan.c */ 1576 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1577 bool br_allowed_ingress(const struct net_bridge *br, 1578 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1579 u16 *vid, u8 *state, 1580 struct net_bridge_vlan **vlan); 1581 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1582 const struct sk_buff *skb); 1583 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1584 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1585 const struct net_bridge_port *port, 1586 struct net_bridge_vlan_group *vg, 1587 struct sk_buff *skb); 1588 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1589 bool *changed, struct netlink_ext_ack *extack); 1590 int br_vlan_delete(struct net_bridge *br, u16 vid); 1591 void br_vlan_flush(struct net_bridge *br); 1592 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1593 void br_recalculate_fwd_mask(struct net_bridge *br); 1594 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1595 struct netlink_ext_ack *extack); 1596 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1597 struct netlink_ext_ack *extack); 1598 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1599 struct netlink_ext_ack *extack); 1600 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1601 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1602 int br_vlan_init(struct net_bridge *br); 1603 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1604 struct netlink_ext_ack *extack); 1605 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1606 struct netlink_ext_ack *extack); 1607 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1608 bool *changed, struct netlink_ext_ack *extack); 1609 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1610 void nbp_vlan_flush(struct net_bridge_port *port); 1611 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1612 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1613 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1614 struct pcpu_sw_netstats *stats); 1615 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1616 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1617 void *ptr); 1618 void br_vlan_vlan_upper_event(struct net_device *br_dev, 1619 struct net_device *vlan_dev, 1620 unsigned long event); 1621 int br_vlan_rtnl_init(void); 1622 void br_vlan_rtnl_uninit(void); 1623 void br_vlan_notify(const struct net_bridge *br, 1624 const struct net_bridge_port *p, 1625 u16 vid, u16 vid_range, 1626 int cmd); 1627 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1628 const struct net_bridge_vlan *range_end); 1629 1630 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1631 struct net_device_path_ctx *ctx, 1632 struct net_device_path *path); 1633 int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1634 struct net_bridge_port *dst, 1635 struct net_device_path *path); 1636 1637 static inline struct net_bridge_vlan_group *br_vlan_group( 1638 const struct net_bridge *br) 1639 { 1640 return rtnl_dereference(br->vlgrp); 1641 } 1642 1643 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1644 const struct net_bridge_port *p) 1645 { 1646 return rtnl_dereference(p->vlgrp); 1647 } 1648 1649 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1650 const struct net_bridge *br) 1651 { 1652 return rcu_dereference(br->vlgrp); 1653 } 1654 1655 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1656 const struct net_bridge_port *p) 1657 { 1658 return rcu_dereference(p->vlgrp); 1659 } 1660 1661 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1662 * skb, the vlan tag will always be present if the frame was tagged. 1663 */ 1664 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1665 { 1666 int err = 0; 1667 1668 if (skb_vlan_tag_present(skb)) { 1669 *vid = skb_vlan_tag_get_id(skb); 1670 } else { 1671 *vid = 0; 1672 err = -EINVAL; 1673 } 1674 1675 return err; 1676 } 1677 1678 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1679 { 1680 if (!vg) 1681 return 0; 1682 1683 smp_rmb(); 1684 return vg->pvid; 1685 } 1686 1687 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1688 { 1689 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1690 } 1691 #else 1692 static inline bool br_allowed_ingress(const struct net_bridge *br, 1693 struct net_bridge_vlan_group *vg, 1694 struct sk_buff *skb, 1695 u16 *vid, u8 *state, 1696 struct net_bridge_vlan **vlan) 1697 1698 { 1699 *vlan = NULL; 1700 return true; 1701 } 1702 1703 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1704 const struct sk_buff *skb) 1705 { 1706 return true; 1707 } 1708 1709 static inline bool br_should_learn(struct net_bridge_port *p, 1710 struct sk_buff *skb, u16 *vid) 1711 { 1712 return true; 1713 } 1714 1715 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1716 const struct net_bridge_port *port, 1717 struct net_bridge_vlan_group *vg, 1718 struct sk_buff *skb) 1719 { 1720 return skb; 1721 } 1722 1723 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1724 bool *changed, struct netlink_ext_ack *extack) 1725 { 1726 *changed = false; 1727 return -EOPNOTSUPP; 1728 } 1729 1730 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1731 { 1732 return -EOPNOTSUPP; 1733 } 1734 1735 static inline void br_vlan_flush(struct net_bridge *br) 1736 { 1737 } 1738 1739 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1740 { 1741 } 1742 1743 static inline int br_vlan_init(struct net_bridge *br) 1744 { 1745 return 0; 1746 } 1747 1748 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1749 bool *changed, struct netlink_ext_ack *extack) 1750 { 1751 *changed = false; 1752 return -EOPNOTSUPP; 1753 } 1754 1755 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1756 { 1757 return -EOPNOTSUPP; 1758 } 1759 1760 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1761 { 1762 } 1763 1764 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1765 u16 vid) 1766 { 1767 return NULL; 1768 } 1769 1770 static inline int nbp_vlan_init(struct net_bridge_port *port, 1771 struct netlink_ext_ack *extack) 1772 { 1773 return 0; 1774 } 1775 1776 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1777 { 1778 return 0; 1779 } 1780 1781 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1782 { 1783 return 0; 1784 } 1785 1786 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1787 unsigned long val, 1788 struct netlink_ext_ack *extack) 1789 { 1790 return -EOPNOTSUPP; 1791 } 1792 1793 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1794 u32 filter_mask) 1795 { 1796 return 0; 1797 } 1798 1799 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1800 struct net_device_path_ctx *ctx, 1801 struct net_device_path *path) 1802 { 1803 } 1804 1805 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1806 struct net_bridge_port *dst, 1807 struct net_device_path *path) 1808 { 1809 return 0; 1810 } 1811 1812 static inline struct net_bridge_vlan_group *br_vlan_group( 1813 const struct net_bridge *br) 1814 { 1815 return NULL; 1816 } 1817 1818 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1819 const struct net_bridge_port *p) 1820 { 1821 return NULL; 1822 } 1823 1824 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1825 const struct net_bridge *br) 1826 { 1827 return NULL; 1828 } 1829 1830 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1831 const struct net_bridge_port *p) 1832 { 1833 return NULL; 1834 } 1835 1836 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1837 struct pcpu_sw_netstats *stats) 1838 { 1839 } 1840 1841 static inline void br_vlan_port_event(struct net_bridge_port *p, 1842 unsigned long event) 1843 { 1844 } 1845 1846 static inline int br_vlan_bridge_event(struct net_device *dev, 1847 unsigned long event, void *ptr) 1848 { 1849 return 0; 1850 } 1851 1852 static inline void br_vlan_vlan_upper_event(struct net_device *br_dev, 1853 struct net_device *vlan_dev, 1854 unsigned long event) 1855 { 1856 } 1857 1858 static inline int br_vlan_rtnl_init(void) 1859 { 1860 return 0; 1861 } 1862 1863 static inline void br_vlan_rtnl_uninit(void) 1864 { 1865 } 1866 1867 static inline void br_vlan_notify(const struct net_bridge *br, 1868 const struct net_bridge_port *p, 1869 u16 vid, u16 vid_range, 1870 int cmd) 1871 { 1872 } 1873 1874 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1875 const struct net_bridge_vlan *range_end) 1876 { 1877 return true; 1878 } 1879 1880 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1881 { 1882 return 0; 1883 } 1884 1885 #endif 1886 1887 /* br_vlan_options.c */ 1888 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1889 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1890 const struct net_bridge_vlan *range_end); 1891 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1892 const struct net_bridge_port *p); 1893 size_t br_vlan_opts_nl_size(void); 1894 int br_vlan_process_options(const struct net_bridge *br, 1895 const struct net_bridge_port *p, 1896 struct net_bridge_vlan *range_start, 1897 struct net_bridge_vlan *range_end, 1898 struct nlattr **tb, 1899 struct netlink_ext_ack *extack); 1900 int br_vlan_rtm_process_global_options(struct net_device *dev, 1901 const struct nlattr *attr, 1902 int cmd, 1903 struct netlink_ext_ack *extack); 1904 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1905 const struct net_bridge_vlan *r_end); 1906 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1907 const struct net_bridge_vlan *v_opts); 1908 1909 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access, 1910 * while br_vlan_set_state() may access data protected by multicast_lock. 1911 */ 1912 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1913 { 1914 return READ_ONCE(v->state); 1915 } 1916 1917 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1918 { 1919 WRITE_ONCE(v->state, state); 1920 br_multicast_update_vlan_mcast_ctx(v, state); 1921 } 1922 1923 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1924 { 1925 return READ_ONCE(vg->pvid_state); 1926 } 1927 1928 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1929 u8 state) 1930 { 1931 WRITE_ONCE(vg->pvid_state, state); 1932 } 1933 1934 /* learn_allow is true at ingress and false at egress */ 1935 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1936 { 1937 switch (state) { 1938 case BR_STATE_LEARNING: 1939 return learn_allow; 1940 case BR_STATE_FORWARDING: 1941 return true; 1942 default: 1943 return false; 1944 } 1945 } 1946 #endif 1947 1948 /* br_mst.c */ 1949 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1950 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1951 static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1952 { 1953 /* check the port's vlan group to avoid racing with port deletion */ 1954 return static_branch_unlikely(&br_mst_used) && 1955 br_opt_get(p->br, BROPT_MST_ENABLED) && 1956 rcu_access_pointer(p->vlgrp); 1957 } 1958 1959 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1960 struct netlink_ext_ack *extack); 1961 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1962 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1963 int br_mst_set_enabled(struct net_bridge *br, bool on, 1964 struct netlink_ext_ack *extack); 1965 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1966 int br_mst_fill_info(struct sk_buff *skb, 1967 const struct net_bridge_vlan_group *vg); 1968 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1969 struct netlink_ext_ack *extack); 1970 void br_mst_uninit(struct net_bridge *br); 1971 #else 1972 static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1973 { 1974 return false; 1975 } 1976 1977 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1978 u8 state, struct netlink_ext_ack *extack) 1979 { 1980 return -EOPNOTSUPP; 1981 } 1982 1983 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1984 struct netlink_ext_ack *extack) 1985 { 1986 return -EOPNOTSUPP; 1987 } 1988 1989 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1990 { 1991 return 0; 1992 } 1993 1994 static inline int br_mst_fill_info(struct sk_buff *skb, 1995 const struct net_bridge_vlan_group *vg) 1996 { 1997 return -EOPNOTSUPP; 1998 } 1999 2000 static inline int br_mst_process(struct net_bridge_port *p, 2001 const struct nlattr *mst_attr, 2002 struct netlink_ext_ack *extack) 2003 { 2004 return -EOPNOTSUPP; 2005 } 2006 2007 static inline void br_mst_uninit(struct net_bridge *br) 2008 { 2009 } 2010 #endif 2011 2012 struct nf_br_ops { 2013 int (*br_dev_xmit_hook)(struct sk_buff *skb); 2014 }; 2015 extern const struct nf_br_ops __rcu *nf_br_ops; 2016 2017 /* br_netfilter.c */ 2018 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 2019 int br_nf_core_init(void); 2020 void br_nf_core_fini(void); 2021 void br_netfilter_rtable_init(struct net_bridge *); 2022 #else 2023 static inline int br_nf_core_init(void) { return 0; } 2024 static inline void br_nf_core_fini(void) {} 2025 #define br_netfilter_rtable_init(x) 2026 #endif 2027 2028 /* br_stp.c */ 2029 void br_set_state(struct net_bridge_port *p, unsigned int state); 2030 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 2031 void br_init_port(struct net_bridge_port *p); 2032 void br_become_designated_port(struct net_bridge_port *p); 2033 2034 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 2035 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 2036 int br_set_hello_time(struct net_bridge *br, unsigned long x); 2037 int br_set_max_age(struct net_bridge *br, unsigned long x); 2038 int __set_ageing_time(struct net_device *dev, unsigned long t); 2039 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 2040 2041 2042 /* br_stp_if.c */ 2043 void br_stp_enable_bridge(struct net_bridge *br); 2044 void br_stp_disable_bridge(struct net_bridge *br); 2045 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 2046 struct netlink_ext_ack *extack); 2047 void br_stp_enable_port(struct net_bridge_port *p); 2048 void br_stp_disable_port(struct net_bridge_port *p); 2049 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 2050 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 2051 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 2052 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 2053 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 2054 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 2055 2056 /* br_stp_bpdu.c */ 2057 struct stp_proto; 2058 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 2059 struct net_device *dev); 2060 2061 /* br_stp_timer.c */ 2062 void br_stp_timer_init(struct net_bridge *br); 2063 void br_stp_port_timer_init(struct net_bridge_port *p); 2064 unsigned long br_timer_value(const struct timer_list *timer); 2065 2066 /* br.c */ 2067 2068 /* br_mrp.c */ 2069 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 2070 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2071 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2072 bool br_mrp_enabled(struct net_bridge *br); 2073 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 2074 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 2075 #else 2076 static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2077 struct nlattr *attr, int cmd, 2078 struct netlink_ext_ack *extack) 2079 { 2080 return -EOPNOTSUPP; 2081 } 2082 2083 static inline bool br_mrp_enabled(struct net_bridge *br) 2084 { 2085 return false; 2086 } 2087 2088 static inline void br_mrp_port_del(struct net_bridge *br, 2089 struct net_bridge_port *p) 2090 { 2091 } 2092 2093 static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br) 2094 { 2095 return 0; 2096 } 2097 2098 #endif 2099 2100 /* br_cfm.c */ 2101 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 2102 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2103 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2104 bool br_cfm_created(struct net_bridge *br); 2105 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 2106 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 2107 int br_cfm_status_fill_info(struct sk_buff *skb, 2108 struct net_bridge *br, 2109 bool getlink); 2110 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 2111 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 2112 #else 2113 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2114 struct nlattr *attr, int cmd, 2115 struct netlink_ext_ack *extack) 2116 { 2117 return -EOPNOTSUPP; 2118 } 2119 2120 static inline bool br_cfm_created(struct net_bridge *br) 2121 { 2122 return false; 2123 } 2124 2125 static inline void br_cfm_port_del(struct net_bridge *br, 2126 struct net_bridge_port *p) 2127 { 2128 } 2129 2130 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2131 { 2132 return -EOPNOTSUPP; 2133 } 2134 2135 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2136 struct net_bridge *br, 2137 bool getlink) 2138 { 2139 return -EOPNOTSUPP; 2140 } 2141 2142 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2143 { 2144 *count = 0; 2145 return -EOPNOTSUPP; 2146 } 2147 2148 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2149 { 2150 *count = 0; 2151 return -EOPNOTSUPP; 2152 } 2153 #endif 2154 2155 /* br_netlink.c */ 2156 extern struct rtnl_link_ops br_link_ops; 2157 int br_netlink_init(void); 2158 void br_netlink_fini(void); 2159 void br_ifinfo_notify(int event, const struct net_bridge *br, 2160 const struct net_bridge_port *port); 2161 void br_info_notify(int event, const struct net_bridge *br, 2162 const struct net_bridge_port *port, u32 filter); 2163 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2164 struct netlink_ext_ack *extack); 2165 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2166 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2167 u32 filter_mask, int nlflags); 2168 int br_process_vlan_info(struct net_bridge *br, 2169 struct net_bridge_port *p, int cmd, 2170 struct bridge_vlan_info *vinfo_curr, 2171 struct bridge_vlan_info **vinfo_last, 2172 bool *changed, 2173 struct netlink_ext_ack *extack); 2174 2175 #ifdef CONFIG_SYSFS 2176 /* br_sysfs_if.c */ 2177 extern const struct sysfs_ops brport_sysfs_ops; 2178 int br_sysfs_addif(struct net_bridge_port *p); 2179 int br_sysfs_renameif(struct net_bridge_port *p); 2180 2181 /* br_sysfs_br.c */ 2182 int br_sysfs_addbr(struct net_device *dev); 2183 void br_sysfs_delbr(struct net_device *dev); 2184 2185 #else 2186 2187 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2188 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2189 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2190 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2191 #endif /* CONFIG_SYSFS */ 2192 2193 /* br_switchdev.c */ 2194 #ifdef CONFIG_NET_SWITCHDEV 2195 int br_switchdev_port_offload(struct net_bridge_port *p, 2196 struct net_device *dev, const void *ctx, 2197 struct notifier_block *atomic_nb, 2198 struct notifier_block *blocking_nb, 2199 bool tx_fwd_offload, 2200 struct netlink_ext_ack *extack); 2201 2202 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2203 struct notifier_block *atomic_nb, 2204 struct notifier_block *blocking_nb); 2205 2206 int br_switchdev_port_replay(struct net_bridge_port *p, 2207 struct net_device *dev, const void *ctx, 2208 struct notifier_block *atomic_nb, 2209 struct notifier_block *blocking_nb, 2210 struct netlink_ext_ack *extack); 2211 2212 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2213 2214 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2215 2216 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2217 struct sk_buff *skb); 2218 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2219 struct sk_buff *skb); 2220 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2221 struct sk_buff *skb); 2222 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2223 const struct sk_buff *skb); 2224 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2225 unsigned long flags, 2226 unsigned long mask, 2227 struct netlink_ext_ack *extack); 2228 void br_switchdev_fdb_notify(struct net_bridge *br, 2229 const struct net_bridge_fdb_entry *fdb, int type); 2230 void br_switchdev_mdb_notify(struct net_device *dev, 2231 struct net_bridge_mdb_entry *mp, 2232 struct net_bridge_port_group *pg, 2233 int type); 2234 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2235 bool changed, struct netlink_ext_ack *extack); 2236 int br_switchdev_port_vlan_no_foreign_add(struct net_device *dev, u16 vid, u16 flags, 2237 bool changed, struct netlink_ext_ack *extack); 2238 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2239 void br_switchdev_init(struct net_bridge *br); 2240 2241 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2242 { 2243 skb->offload_fwd_mark = 0; 2244 } 2245 #else 2246 static inline int 2247 br_switchdev_port_offload(struct net_bridge_port *p, 2248 struct net_device *dev, const void *ctx, 2249 struct notifier_block *atomic_nb, 2250 struct notifier_block *blocking_nb, 2251 bool tx_fwd_offload, 2252 struct netlink_ext_ack *extack) 2253 { 2254 return -EOPNOTSUPP; 2255 } 2256 2257 static inline void 2258 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2259 struct notifier_block *atomic_nb, 2260 struct notifier_block *blocking_nb) 2261 { 2262 } 2263 2264 static inline int 2265 br_switchdev_port_replay(struct net_bridge_port *p, 2266 struct net_device *dev, const void *ctx, 2267 struct notifier_block *atomic_nb, 2268 struct notifier_block *blocking_nb, 2269 struct netlink_ext_ack *extack) 2270 { 2271 return -EOPNOTSUPP; 2272 } 2273 2274 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2275 { 2276 return false; 2277 } 2278 2279 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2280 { 2281 } 2282 2283 static inline void 2284 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2285 struct sk_buff *skb) 2286 { 2287 } 2288 2289 static inline void 2290 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2291 struct sk_buff *skb) 2292 { 2293 } 2294 2295 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2296 struct sk_buff *skb) 2297 { 2298 } 2299 2300 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2301 const struct sk_buff *skb) 2302 { 2303 return true; 2304 } 2305 2306 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2307 unsigned long flags, 2308 unsigned long mask, 2309 struct netlink_ext_ack *extack) 2310 { 2311 return 0; 2312 } 2313 2314 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2315 u16 flags, bool changed, 2316 struct netlink_ext_ack *extack) 2317 { 2318 return -EOPNOTSUPP; 2319 } 2320 2321 static inline int br_switchdev_port_vlan_no_foreign_add(struct net_device *dev, u16 vid, 2322 u16 flags, bool changed, 2323 struct netlink_ext_ack *extack) 2324 { 2325 return -EOPNOTSUPP; 2326 } 2327 2328 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2329 { 2330 return -EOPNOTSUPP; 2331 } 2332 2333 static inline void 2334 br_switchdev_fdb_notify(struct net_bridge *br, 2335 const struct net_bridge_fdb_entry *fdb, int type) 2336 { 2337 } 2338 2339 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2340 struct net_bridge_mdb_entry *mp, 2341 struct net_bridge_port_group *pg, 2342 int type) 2343 { 2344 } 2345 2346 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2347 { 2348 } 2349 2350 static inline void br_switchdev_init(struct net_bridge *br) 2351 { 2352 } 2353 2354 #endif /* CONFIG_NET_SWITCHDEV */ 2355 2356 /* br_arp_nd_proxy.c */ 2357 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2358 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2359 u16 vid, struct net_bridge_port *p); 2360 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2361 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2362 struct nd_msg *br_is_nd_neigh_msg(const struct sk_buff *skb, struct nd_msg *m); 2363 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid); 2364 #endif 2365