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 struct sk_buff_head query_queue; 135 struct work_struct query_queue_work; 136 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 137 }; 138 139 /* net_bridge_mcast must be always defined due to forwarding stubs */ 140 struct net_bridge_mcast { 141 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 142 struct net_bridge *br; 143 struct net_bridge_vlan *vlan; 144 145 u32 multicast_last_member_count; 146 u32 multicast_startup_query_count; 147 148 u8 multicast_querier; 149 u8 multicast_igmp_version; 150 u8 multicast_router; 151 #if IS_ENABLED(CONFIG_IPV6) 152 u8 multicast_mld_version; 153 #endif 154 unsigned long multicast_last_member_interval; 155 unsigned long multicast_membership_interval; 156 unsigned long multicast_querier_interval; 157 unsigned long multicast_query_interval; 158 unsigned long multicast_query_response_interval; 159 unsigned long multicast_startup_query_interval; 160 struct hlist_head ip4_mc_router_list; 161 struct timer_list ip4_mc_router_timer; 162 struct bridge_mcast_other_query ip4_other_query; 163 struct bridge_mcast_own_query ip4_own_query; 164 struct bridge_mcast_querier ip4_querier; 165 #if IS_ENABLED(CONFIG_IPV6) 166 struct hlist_head ip6_mc_router_list; 167 struct timer_list ip6_mc_router_timer; 168 struct bridge_mcast_other_query ip6_other_query; 169 struct bridge_mcast_own_query ip6_own_query; 170 struct bridge_mcast_querier ip6_querier; 171 #endif /* IS_ENABLED(CONFIG_IPV6) */ 172 struct sk_buff_head query_queue; 173 struct work_struct query_queue_work; 174 #endif /* CONFIG_BRIDGE_IGMP_SNOOPING */ 175 }; 176 177 struct br_tunnel_info { 178 __be64 tunnel_id; 179 struct metadata_dst __rcu *tunnel_dst; 180 }; 181 182 /* private vlan flags */ 183 enum { 184 BR_VLFLAG_PER_PORT_STATS = BIT(0), 185 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1), 186 BR_VLFLAG_MCAST_ENABLED = BIT(2), 187 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3), 188 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4), 189 BR_VLFLAG_TAGGING_BY_SWITCHDEV = BIT(5), 190 BR_VLFLAG_NEIGH_FORWARD_GRAT_ENABLED = BIT(6), 191 }; 192 193 /** 194 * struct net_bridge_vlan - per-vlan entry 195 * 196 * @vnode: rhashtable member 197 * @tnode: rhashtable member 198 * @vid: VLAN id 199 * @flags: bridge vlan flags 200 * @priv_flags: private (in-kernel) bridge vlan flags 201 * @state: STP state (e.g. blocking, learning, forwarding) 202 * @stats: per-cpu VLAN statistics 203 * @br: if MASTER flag set, this points to a bridge struct 204 * @port: if MASTER flag unset, this points to a port struct 205 * @refcnt: if MASTER flag set, this is bumped for each port referencing it 206 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context 207 * for this VLAN entry 208 * @tinfo: bridge tunnel info 209 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context 210 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast 211 * context 212 * @msti: if MASTER flag set, this holds the VLANs MST instance 213 * @vlist: sorted list of VLAN entries 214 * @rcu: used for entry destruction 215 * 216 * This structure is shared between the global per-VLAN entries contained in 217 * the bridge rhashtable and the local per-port per-VLAN entries contained in 218 * the port's rhashtable. The union entries should be interpreted depending on 219 * the entry flags that are set. 220 */ 221 struct net_bridge_vlan { 222 struct rhash_head vnode; 223 struct rhash_head tnode; 224 u16 vid; 225 u16 flags; 226 u16 priv_flags; 227 u8 state; 228 struct pcpu_sw_netstats __percpu *stats; 229 union { 230 struct net_bridge *br; 231 struct net_bridge_port *port; 232 }; 233 union { 234 refcount_t refcnt; 235 struct net_bridge_vlan *brvlan; 236 }; 237 238 struct br_tunnel_info tinfo; 239 240 union { 241 struct net_bridge_mcast br_mcast_ctx; 242 struct net_bridge_mcast_port port_mcast_ctx; 243 }; 244 245 u16 msti; 246 247 struct list_head vlist; 248 249 struct rcu_head rcu; 250 }; 251 252 /** 253 * struct net_bridge_vlan_group 254 * 255 * @vlan_hash: VLAN entry rhashtable 256 * @tunnel_hash: Hash table to map from tunnel key ID (e.g. VXLAN VNI) to VLAN 257 * @vlan_list: sorted VLAN entry list 258 * @num_vlans: number of total VLAN entries 259 * @pvid: PVID VLAN id 260 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking) 261 * 262 * IMPORTANT: Be careful when checking if there're VLAN entries using list 263 * primitives because the bridge can have entries in its list which 264 * are just for global context but not for filtering, i.e. they have 265 * the master flag set but not the brentry flag. If you have to check 266 * if there're "real" entries in the bridge please test @num_vlans 267 */ 268 struct net_bridge_vlan_group { 269 struct rhashtable vlan_hash; 270 struct rhashtable tunnel_hash; 271 struct list_head vlan_list; 272 u16 num_vlans; 273 u16 pvid; 274 u8 pvid_state; 275 }; 276 277 /* bridge fdb flags */ 278 enum { 279 BR_FDB_LOCAL, 280 BR_FDB_STATIC, 281 BR_FDB_STICKY, 282 BR_FDB_ADDED_BY_USER, 283 BR_FDB_ADDED_BY_EXT_LEARN, 284 BR_FDB_OFFLOADED, 285 BR_FDB_NOTIFY, 286 BR_FDB_NOTIFY_INACTIVE, 287 BR_FDB_LOCKED, 288 BR_FDB_DYNAMIC_LEARNED, 289 }; 290 291 struct net_bridge_fdb_key { 292 mac_addr addr; 293 u16 vlan_id; 294 }; 295 296 struct net_bridge_fdb_entry { 297 struct rhash_head rhnode; 298 struct net_bridge_port *dst; 299 300 struct net_bridge_fdb_key key; 301 struct hlist_node fdb_node; 302 unsigned long flags; 303 304 /* write-heavy members should not affect lookups */ 305 unsigned long updated ____cacheline_aligned_in_smp; 306 unsigned long used; 307 308 struct rcu_head rcu; 309 }; 310 311 struct net_bridge_fdb_flush_desc { 312 unsigned long flags; 313 unsigned long flags_mask; 314 int port_ifindex; 315 u16 vlan_id; 316 }; 317 318 #define MDB_PG_FLAGS_PERMANENT BIT(0) 319 #define MDB_PG_FLAGS_OFFLOAD BIT(1) 320 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2) 321 #define MDB_PG_FLAGS_STAR_EXCL BIT(3) 322 #define MDB_PG_FLAGS_BLOCKED BIT(4) 323 #define MDB_PG_FLAGS_OFFLOAD_FAILED BIT(5) 324 325 #define PG_SRC_ENT_LIMIT 32 326 327 #define BR_SGRP_F_DELETE BIT(0) 328 #define BR_SGRP_F_SEND BIT(1) 329 #define BR_SGRP_F_INSTALLED BIT(2) 330 #define BR_SGRP_F_USER_ADDED BIT(3) 331 332 struct net_bridge_mcast_gc { 333 struct hlist_node gc_node; 334 void (*destroy)(struct net_bridge_mcast_gc *gc); 335 }; 336 337 struct net_bridge_group_src { 338 struct hlist_node node; 339 340 struct br_ip addr; 341 struct net_bridge_port_group *pg; 342 u8 flags; 343 u8 src_query_rexmit_cnt; 344 struct timer_list timer; 345 346 struct net_bridge *br; 347 struct net_bridge_mcast_gc mcast_gc; 348 struct rcu_head rcu; 349 }; 350 351 struct net_bridge_port_group_sg_key { 352 struct net_bridge_port *port; 353 struct br_ip addr; 354 }; 355 356 struct net_bridge_port_group { 357 struct net_bridge_port_group __rcu *next; 358 struct net_bridge_port_group_sg_key key; 359 unsigned char eth_addr[ETH_ALEN] __aligned(2); 360 unsigned char flags; 361 unsigned char filter_mode; 362 unsigned char grp_query_rexmit_cnt; 363 unsigned char rt_protocol; 364 365 struct hlist_head src_list; 366 unsigned int src_ents; 367 struct timer_list timer; 368 struct timer_list rexmit_timer; 369 struct hlist_node mglist; 370 struct rb_root eht_set_tree; 371 struct rb_root eht_host_tree; 372 373 struct rhash_head rhnode; 374 struct net_bridge_mcast_gc mcast_gc; 375 struct rcu_head rcu; 376 }; 377 378 struct net_bridge_mdb_entry { 379 struct rhash_head rhnode; 380 struct net_bridge *br; 381 struct net_bridge_port_group __rcu *ports; 382 struct br_ip addr; 383 bool host_joined; 384 385 struct timer_list timer; 386 struct hlist_node mdb_node; 387 388 struct net_bridge_mcast_gc mcast_gc; 389 struct rcu_head rcu; 390 }; 391 392 struct net_bridge_port { 393 struct net_bridge *br; 394 struct net_device *dev; 395 netdevice_tracker dev_tracker; 396 struct list_head list; 397 398 unsigned long flags; 399 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 400 struct net_bridge_vlan_group __rcu *vlgrp; 401 #endif 402 struct net_bridge_port __rcu *backup_port; 403 u32 backup_nhid; 404 405 /* STP */ 406 u8 priority; 407 u8 state; 408 u16 port_no; 409 unsigned char topology_change_ack; 410 unsigned char config_pending; 411 port_id port_id; 412 port_id designated_port; 413 bridge_id designated_root; 414 bridge_id designated_bridge; 415 u32 path_cost; 416 u32 designated_cost; 417 unsigned long designated_age; 418 419 struct timer_list forward_delay_timer; 420 struct timer_list hold_timer; 421 struct timer_list message_age_timer; 422 struct kobject kobj; 423 struct rcu_head rcu; 424 425 struct net_bridge_mcast_port multicast_ctx; 426 427 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 428 struct bridge_mcast_stats __percpu *mcast_stats; 429 430 u32 multicast_eht_hosts_limit; 431 u32 multicast_eht_hosts_cnt; 432 struct hlist_head mglist; 433 #endif 434 435 #ifdef CONFIG_SYSFS 436 char sysfs_name[IFNAMSIZ]; 437 #endif 438 439 #ifdef CONFIG_NET_POLL_CONTROLLER 440 struct netpoll *np; 441 #endif 442 #ifdef CONFIG_NET_SWITCHDEV 443 /* Identifier used to group ports that share the same switchdev 444 * hardware domain. 445 */ 446 int hwdom; 447 int offload_count; 448 struct netdev_phys_item_id ppid; 449 #endif 450 u16 group_fwd_mask; 451 u16 backup_redirected_cnt; 452 453 struct bridge_stp_xstats stp_xstats; 454 }; 455 456 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 457 458 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK) 459 #define br_promisc_port(p) test_bit(BR_PROMISC_BIT, &(p)->flags) 460 461 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev) 462 { 463 return rcu_dereference(dev->rx_handler_data); 464 } 465 466 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev) 467 { 468 return netif_is_bridge_port(dev) ? 469 rtnl_dereference(dev->rx_handler_data) : NULL; 470 } 471 472 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev) 473 { 474 return netif_is_bridge_port(dev) ? 475 rcu_dereference_rtnl(dev->rx_handler_data) : NULL; 476 } 477 478 enum net_bridge_opts { 479 BROPT_VLAN_ENABLED, 480 BROPT_VLAN_STATS_ENABLED, 481 BROPT_NF_CALL_IPTABLES, 482 BROPT_NF_CALL_IP6TABLES, 483 BROPT_NF_CALL_ARPTABLES, 484 BROPT_GROUP_ADDR_SET, 485 BROPT_MULTICAST_ENABLED, 486 BROPT_MULTICAST_QUERY_USE_IFADDR, 487 BROPT_MULTICAST_STATS_ENABLED, 488 BROPT_HAS_IPV6_ADDR, 489 BROPT_NEIGH_SUPPRESS_ENABLED, 490 BROPT_MTU_SET_BY_USER, 491 BROPT_VLAN_STATS_PER_PORT, 492 BROPT_NO_LL_LEARN, 493 BROPT_VLAN_BRIDGE_BINDING, 494 BROPT_MCAST_VLAN_SNOOPING_ENABLED, 495 BROPT_MST_ENABLED, 496 BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION, 497 BROPT_FDB_LOCAL_VLAN_0, 498 BROPT_CFM_ENABLED, 499 BROPT_MRP_ENABLED, 500 }; 501 502 struct net_bridge { 503 spinlock_t lock; 504 spinlock_t hash_lock; 505 struct net_device *dev; 506 unsigned long options; 507 /* These fields are accessed on each packet */ 508 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 509 __be16 vlan_proto; 510 u16 default_pvid; 511 struct net_bridge_vlan_group __rcu *vlgrp; 512 #endif 513 514 struct rhashtable fdb_hash_tbl; 515 struct list_head port_list; 516 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 517 union { 518 struct rtable fake_rtable; 519 struct rt6_info fake_rt6_info; 520 }; 521 u32 metrics[RTAX_MAX]; 522 #endif 523 u16 group_fwd_mask; 524 u16 group_fwd_mask_required; 525 526 /* STP */ 527 bridge_id designated_root; 528 bridge_id bridge_id; 529 unsigned char topology_change; 530 unsigned char topology_change_detected; 531 u16 root_port; 532 u8 stp_mode; 533 bool stp_helper_active; 534 unsigned long max_age; 535 unsigned long hello_time; 536 unsigned long forward_delay; 537 unsigned long ageing_time; 538 unsigned long bridge_max_age; 539 unsigned long bridge_hello_time; 540 unsigned long bridge_forward_delay; 541 unsigned long bridge_ageing_time; 542 u32 root_path_cost; 543 544 u8 group_addr[ETH_ALEN]; 545 546 enum { 547 BR_NO_STP, /* no spanning tree */ 548 BR_KERNEL_STP, /* old STP in kernel */ 549 BR_USER_STP, /* new RSTP in userspace */ 550 } stp_enabled; 551 552 struct net_bridge_mcast multicast_ctx; 553 554 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 555 struct bridge_mcast_stats __percpu *mcast_stats; 556 557 u32 hash_max; 558 559 spinlock_t multicast_lock; 560 561 struct rhashtable mdb_hash_tbl; 562 struct rhashtable sg_port_tbl; 563 564 struct hlist_head mcast_gc_list; 565 struct hlist_head mdb_list; 566 567 struct work_struct mcast_gc_work; 568 #endif 569 570 struct timer_list hello_timer; 571 struct timer_list tcn_timer; 572 struct timer_list topology_change_timer; 573 struct delayed_work gc_work; 574 struct kobject *ifobj; 575 u32 auto_cnt; 576 577 atomic_t fdb_n_learned; 578 u32 fdb_max_learned; 579 580 #ifdef CONFIG_NET_SWITCHDEV 581 /* Counter used to make sure that hardware domains get unique 582 * identifiers in case a bridge spans multiple switchdev instances. 583 */ 584 int last_hwdom; 585 /* Bit mask of hardware domain numbers in use */ 586 unsigned long busy_hwdoms; 587 #endif 588 struct hlist_head fdb_list; 589 590 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 591 struct hlist_head mrp_list; 592 #endif 593 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 594 struct hlist_head mep_list; 595 #endif 596 }; 597 598 struct br_input_skb_cb { 599 struct net_device *brdev; 600 601 u16 frag_max_size; 602 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 603 u8 igmp; 604 u8 mrouters_only:1; 605 #endif 606 u8 proxyarp_replied:1; 607 u8 src_port_isolated:1; 608 u8 promisc:1; 609 u8 grat_arp:1; 610 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 611 u8 vlan_filtered:1; 612 #endif 613 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE 614 u8 br_netfilter_broute:1; 615 #endif 616 617 #ifdef CONFIG_NET_SWITCHDEV 618 /* Set if TX data plane offloading is used towards at least one 619 * hardware domain. 620 */ 621 u8 tx_fwd_offload:1; 622 /* The switchdev hardware domain from which this packet was received. 623 * If skb->offload_fwd_mark was set, then this packet was already 624 * forwarded by hardware to the other ports in the source hardware 625 * domain, otherwise it wasn't. 626 */ 627 int src_hwdom; 628 /* Bit mask of hardware domains towards this packet has already been 629 * transmitted using the TX data plane offload. 630 */ 631 unsigned long fwd_hwdoms; 632 #endif 633 634 u32 backup_nhid; 635 }; 636 637 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) 638 639 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 640 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) 641 #else 642 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) 643 #endif 644 645 #define br_printk(level, br, format, args...) \ 646 printk(level "%s: " format, (br)->dev->name, ##args) 647 648 #define br_err(__br, format, args...) \ 649 br_printk(KERN_ERR, __br, format, ##args) 650 #define br_warn(__br, format, args...) \ 651 br_printk(KERN_WARNING, __br, format, ##args) 652 #define br_notice(__br, format, args...) \ 653 br_printk(KERN_NOTICE, __br, format, ##args) 654 #define br_info(__br, format, args...) \ 655 br_printk(KERN_INFO, __br, format, ##args) 656 657 #define br_debug(br, format, args...) \ 658 pr_debug("%s: " format, (br)->dev->name, ##args) 659 660 /* called under bridge lock */ 661 static inline int br_is_root_bridge(const struct net_bridge *br) 662 { 663 return !memcmp(&br->bridge_id, &br->designated_root, 8); 664 } 665 666 /* check if a VLAN entry is global */ 667 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v) 668 { 669 return v->flags & BRIDGE_VLAN_INFO_MASTER; 670 } 671 672 /* check if a VLAN entry is used by the bridge */ 673 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v) 674 { 675 return v->flags & BRIDGE_VLAN_INFO_BRENTRY; 676 } 677 678 /* check if we should use the vlan entry, returns false if it's only context */ 679 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) 680 { 681 if (br_vlan_is_master(v)) { 682 if (br_vlan_is_brentry(v)) 683 return true; 684 else 685 return false; 686 } 687 688 return true; 689 } 690 691 static inline bool nbp_state_should_learn(const struct net_bridge_port *p) 692 { 693 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; 694 } 695 696 static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack) 697 { 698 bool ret = vid > 0 && vid < VLAN_VID_MASK; 699 700 if (!ret) 701 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid"); 702 703 return ret; 704 } 705 706 static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur, 707 const struct bridge_vlan_info *last, 708 struct netlink_ext_ack *extack) 709 { 710 /* pvid flag is not allowed in ranges */ 711 if (cur->flags & BRIDGE_VLAN_INFO_PVID) { 712 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range"); 713 return false; 714 } 715 716 /* when cur is the range end, check if: 717 * - it has range start flag 718 * - range ids are invalid (end is equal to or before start) 719 */ 720 if (last) { 721 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) { 722 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one"); 723 return false; 724 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) { 725 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing"); 726 return false; 727 } else if (cur->vid <= last->vid) { 728 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id"); 729 return false; 730 } 731 } 732 733 /* check for required range flags */ 734 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | 735 BRIDGE_VLAN_INFO_RANGE_END))) { 736 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing"); 737 return false; 738 } 739 740 return true; 741 } 742 743 static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v) 744 { 745 u8 mcast_router = MDB_RTR_TYPE_DISABLED; 746 747 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 748 if (!br_vlan_is_master(v)) 749 mcast_router = v->port_mcast_ctx.multicast_router; 750 else 751 mcast_router = v->br_mcast_ctx.multicast_router; 752 #endif 753 754 return mcast_router; 755 } 756 757 static inline int br_afspec_cmd_to_rtm(int cmd) 758 { 759 switch (cmd) { 760 case RTM_SETLINK: 761 return RTM_NEWVLAN; 762 case RTM_DELLINK: 763 return RTM_DELVLAN; 764 } 765 766 return 0; 767 } 768 769 static inline int br_opt_get(const struct net_bridge *br, 770 enum net_bridge_opts opt) 771 { 772 return test_bit(opt, &br->options); 773 } 774 775 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, 776 struct netlink_ext_ack *extack); 777 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); 778 int br_boolopt_multi_toggle(struct net_bridge *br, 779 struct br_boolopt_multi *bm, 780 struct netlink_ext_ack *extack); 781 void br_boolopt_multi_get(const struct net_bridge *br, 782 struct br_boolopt_multi *bm); 783 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); 784 785 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) 786 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 787 { 788 struct tc_skb_ext *ext; 789 790 if (!tc_skb_ext_tc_enabled()) 791 return; 792 793 ext = skb_ext_find(skb, TC_SKB_EXT); 794 if (ext) { 795 ext->l2_miss = miss; 796 return; 797 } 798 if (!miss) 799 return; 800 ext = tc_skb_ext_alloc(skb); 801 if (!ext) 802 return; 803 ext->l2_miss = true; 804 } 805 #else 806 static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss) 807 { 808 } 809 #endif 810 811 /* br_device.c */ 812 void br_dev_setup(struct net_device *dev); 813 void br_dev_delete(struct net_device *dev, struct list_head *list); 814 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 815 #ifdef CONFIG_NET_POLL_CONTROLLER 816 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 817 struct sk_buff *skb) 818 { 819 netpoll_send_skb(p->np, skb); 820 } 821 822 int br_netpoll_enable(struct net_bridge_port *p); 823 void br_netpoll_disable(struct net_bridge_port *p); 824 #else 825 static inline void br_netpoll_send_skb(const struct net_bridge_port *p, 826 struct sk_buff *skb) 827 { 828 } 829 830 static inline int br_netpoll_enable(struct net_bridge_port *p) 831 { 832 return 0; 833 } 834 835 static inline void br_netpoll_disable(struct net_bridge_port *p) 836 { 837 } 838 #endif 839 840 /* br_fdb.c */ 841 #define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF) 842 #define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP) 843 #define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \ 844 NTF_STICKY | NTF_OFFLOADED) 845 846 int br_fdb_init(void); 847 void br_fdb_fini(void); 848 int br_fdb_hash_init(struct net_bridge *br); 849 void br_fdb_hash_fini(struct net_bridge *br); 850 void br_fdb_flush(struct net_bridge *br, 851 const struct net_bridge_fdb_flush_desc *desc); 852 void br_fdb_find_delete_local(struct net_bridge *br, 853 const struct net_bridge_port *p, 854 const unsigned char *addr, u16 vid); 855 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr); 856 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr); 857 void br_fdb_cleanup(struct work_struct *work); 858 int br_fdb_toggle_local_vlan_0(struct net_bridge *br, bool on, 859 struct netlink_ext_ack *extack); 860 void br_fdb_delete_by_port(struct net_bridge *br, 861 const struct net_bridge_port *p, u16 vid, int do_all); 862 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, 863 const unsigned char *addr, 864 __u16 vid); 865 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count, 866 unsigned long off); 867 int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, 868 const unsigned char *addr, u16 vid); 869 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, 870 const unsigned char *addr, u16 vid, unsigned long flags); 871 872 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], 873 struct net_device *dev, const unsigned char *addr, u16 vid, 874 bool *notified, struct netlink_ext_ack *extack); 875 int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev, 876 struct netlink_ext_ack *extack); 877 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev, 878 const unsigned char *addr, u16 vid, u16 nlh_flags, 879 bool *notified, struct netlink_ext_ack *extack); 880 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb, 881 struct net_device *dev, struct net_device *fdev, int *idx); 882 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, 883 const unsigned char *addr, u16 vid, u32 portid, u32 seq, 884 struct netlink_ext_ack *extack); 885 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p); 886 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p); 887 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, 888 const unsigned char *addr, u16 vid, 889 bool locked, bool swdev_notify); 890 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, 891 const unsigned char *addr, u16 vid, 892 bool swdev_notify); 893 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, 894 const unsigned char *addr, u16 vid, bool offloaded); 895 896 /* br_forward.c */ 897 enum br_pkt_type { 898 BR_PKT_UNICAST, 899 BR_PKT_MULTICAST, 900 BR_PKT_BROADCAST 901 }; 902 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb); 903 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, 904 bool local_rcv, bool local_orig); 905 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 906 void br_flood(struct net_bridge *br, struct sk_buff *skb, 907 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig, 908 u16 vid); 909 910 /* return true if both source port and dest port are isolated */ 911 static inline bool br_skb_isolated(const struct net_bridge_port *to, 912 const struct sk_buff *skb) 913 { 914 return BR_INPUT_SKB_CB(skb)->src_port_isolated && 915 (to->flags & BR_ISOLATED); 916 } 917 918 /* br_if.c */ 919 void br_port_carrier_check(struct net_bridge_port *p, bool *notified); 920 int br_add_bridge(struct net *net, const char *name); 921 int br_del_bridge(struct net *net, const char *name); 922 int br_add_if(struct net_bridge *br, struct net_device *dev, 923 struct netlink_ext_ack *extack); 924 int br_del_if(struct net_bridge *br, struct net_device *dev); 925 void br_mtu_auto_adjust(struct net_bridge *br); 926 netdev_features_t br_features_recompute(struct net_bridge *br, 927 netdev_features_t features); 928 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask); 929 void br_manage_promisc(struct net_bridge *br); 930 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); 931 932 /* br_input.c */ 933 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); 934 rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); 935 936 static inline bool br_rx_handler_check_rcu(const struct net_device *dev) 937 { 938 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); 939 } 940 941 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev) 942 { 943 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev); 944 } 945 946 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev) 947 { 948 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL; 949 } 950 951 static inline struct net_bridge_port * 952 br_port_get_check_rtnl(const struct net_device *dev) 953 { 954 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL; 955 } 956 957 /* br_ioctl.c */ 958 int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq, 959 void __user *data, int cmd); 960 int br_ioctl_stub(struct net *net, unsigned int cmd, void __user *uarg); 961 962 /* br_multicast.c */ 963 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 964 int br_multicast_rcv(struct net_bridge_mcast **brmctx, 965 struct net_bridge_mcast_port **pmctx, 966 struct net_bridge_vlan *vlan, 967 struct sk_buff *skb, u16 vid); 968 struct net_bridge_mdb_entry * 969 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 970 u16 vid); 971 int br_multicast_add_port(struct net_bridge_port *port); 972 void br_multicast_del_port(struct net_bridge_port *port); 973 void br_multicast_enable_port(struct net_bridge_port *port); 974 void br_multicast_disable_port(struct net_bridge_port *port); 975 void br_multicast_init(struct net_bridge *br); 976 void br_multicast_join_snoopers(struct net_bridge *br); 977 void br_multicast_leave_snoopers(struct net_bridge *br); 978 void br_multicast_open(struct net_bridge *br); 979 void br_multicast_stop(struct net_bridge *br); 980 void br_multicast_dev_del(struct net_bridge *br); 981 void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb, 982 struct net_bridge_mcast *brmctx, 983 bool local_rcv, bool local_orig); 984 int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val); 985 int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx, 986 unsigned long val); 987 int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router); 988 int br_multicast_toggle(struct net_bridge *br, unsigned long val, 989 struct netlink_ext_ack *extack); 990 int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val); 991 int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx, 992 unsigned long val); 993 #if IS_ENABLED(CONFIG_IPV6) 994 int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx, 995 unsigned long val); 996 #endif 997 struct net_bridge_mdb_entry * 998 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst); 999 struct net_bridge_mdb_entry * 1000 br_multicast_new_group(struct net_bridge *br, struct br_ip *group); 1001 struct net_bridge_port_group * 1002 br_multicast_new_port_group(struct net_bridge_port *port, 1003 const struct br_ip *group, 1004 struct net_bridge_port_group __rcu *next, 1005 unsigned char flags, const unsigned char *src, 1006 u8 filter_mode, u8 rt_protocol, 1007 struct netlink_ext_ack *extack); 1008 void br_multicast_del_port_group(struct net_bridge_port_group *p); 1009 int br_mdb_hash_init(struct net_bridge *br); 1010 void br_mdb_hash_fini(struct net_bridge *br); 1011 void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1012 struct net_bridge_port_group *pg, int type); 1013 void br_mdb_flag_change_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp, 1014 struct net_bridge_port_group *pg); 1015 void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx, 1016 int type); 1017 void br_multicast_del_pg(struct net_bridge_mdb_entry *mp, 1018 struct net_bridge_port_group *pg, 1019 struct net_bridge_port_group __rcu **pp); 1020 void br_multicast_count(struct net_bridge *br, 1021 const struct net_bridge_port *p, 1022 const struct sk_buff *skb, u8 type, u8 dir); 1023 int br_multicast_init_stats(struct net_bridge *br); 1024 void br_multicast_uninit_stats(struct net_bridge *br); 1025 void br_multicast_get_stats(const struct net_bridge *br, 1026 const struct net_bridge_port *p, 1027 struct br_mcast_stats *dest); 1028 u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx); 1029 void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max); 1030 u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx); 1031 int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, 1032 struct netlink_ext_ack *extack); 1033 int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1034 struct netlink_ext_ack *extack); 1035 int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1036 struct netlink_ext_ack *extack); 1037 int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1038 struct netlink_callback *cb); 1039 int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq, 1040 struct netlink_ext_ack *extack); 1041 void br_multicast_host_join(const struct net_bridge_mcast *brmctx, 1042 struct net_bridge_mdb_entry *mp, bool notify); 1043 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify); 1044 void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg, 1045 u8 filter_mode); 1046 void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp, 1047 struct net_bridge_port_group *sg); 1048 struct net_bridge_group_src * 1049 br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip); 1050 struct net_bridge_group_src * 1051 br_multicast_new_group_src(struct net_bridge_port_group *pg, 1052 struct br_ip *src_ip); 1053 void __br_multicast_del_group_src(struct net_bridge_group_src *src); 1054 void br_multicast_del_group_src(struct net_bridge_group_src *src, 1055 bool fastleave); 1056 void br_multicast_ctx_init(struct net_bridge *br, 1057 struct net_bridge_vlan *vlan, 1058 struct net_bridge_mcast *brmctx); 1059 void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx); 1060 void br_multicast_port_ctx_init(struct net_bridge_port *port, 1061 struct net_bridge_vlan *vlan, 1062 struct net_bridge_mcast_port *pmctx); 1063 void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx); 1064 void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, u8 state); 1065 void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on); 1066 int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on, 1067 struct netlink_ext_ack *extack); 1068 bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on); 1069 1070 int br_rports_fill_info(struct sk_buff *skb, 1071 const struct net_bridge_mcast *brmctx); 1072 int br_multicast_dump_querier_state(struct sk_buff *skb, 1073 const struct net_bridge_mcast *brmctx, 1074 int nest_attr); 1075 size_t br_multicast_querier_state_size(void); 1076 size_t br_rports_size(const struct net_bridge_mcast *brmctx); 1077 void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx, 1078 unsigned long val); 1079 void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx, 1080 unsigned long val); 1081 1082 static inline bool br_group_is_l2(const struct br_ip *group) 1083 { 1084 return group->proto == 0; 1085 } 1086 1087 #define mlock_dereference(X, br) \ 1088 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) 1089 1090 static inline struct hlist_node * 1091 br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx, 1092 struct sk_buff *skb) 1093 { 1094 #if IS_ENABLED(CONFIG_IPV6) 1095 if (skb->protocol == htons(ETH_P_IPV6)) 1096 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list)); 1097 #endif 1098 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list)); 1099 } 1100 1101 static inline struct net_bridge_port * 1102 br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) 1103 { 1104 struct net_bridge_mcast_port *mctx; 1105 1106 #if IS_ENABLED(CONFIG_IPV6) 1107 if (skb->protocol == htons(ETH_P_IPV6)) 1108 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1109 ip6_rlist); 1110 else 1111 #endif 1112 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port, 1113 ip4_rlist); 1114 1115 if (mctx) 1116 return mctx->port; 1117 else 1118 return NULL; 1119 } 1120 1121 static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx) 1122 { 1123 return timer_pending(&brmctx->ip4_mc_router_timer); 1124 } 1125 1126 static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx) 1127 { 1128 #if IS_ENABLED(CONFIG_IPV6) 1129 return timer_pending(&brmctx->ip6_mc_router_timer); 1130 #else 1131 return false; 1132 #endif 1133 } 1134 1135 static inline bool 1136 br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb) 1137 { 1138 switch (brmctx->multicast_router) { 1139 case MDB_RTR_TYPE_PERM: 1140 return true; 1141 case MDB_RTR_TYPE_TEMP_QUERY: 1142 if (skb) { 1143 if (skb->protocol == htons(ETH_P_IP)) 1144 return br_ip4_multicast_is_router(brmctx); 1145 else if (skb->protocol == htons(ETH_P_IPV6)) 1146 return br_ip6_multicast_is_router(brmctx); 1147 } else { 1148 return br_ip4_multicast_is_router(brmctx) || 1149 br_ip6_multicast_is_router(brmctx); 1150 } 1151 fallthrough; 1152 default: 1153 return false; 1154 } 1155 } 1156 1157 static inline bool 1158 __br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1159 struct bridge_mcast_other_query *querier, 1160 const bool is_ipv6) 1161 { 1162 bool own_querier_enabled; 1163 1164 if (brmctx->multicast_querier) { 1165 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR)) 1166 own_querier_enabled = false; 1167 else 1168 own_querier_enabled = true; 1169 } else { 1170 own_querier_enabled = false; 1171 } 1172 1173 return !timer_pending(&querier->delay_timer) && 1174 (own_querier_enabled || timer_pending(&querier->timer)); 1175 } 1176 1177 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1178 struct ethhdr *eth, 1179 const struct net_bridge_mdb_entry *mdb) 1180 { 1181 switch (eth->h_proto) { 1182 case (htons(ETH_P_IP)): 1183 return __br_multicast_querier_exists(brmctx, 1184 &brmctx->ip4_other_query, false); 1185 #if IS_ENABLED(CONFIG_IPV6) 1186 case (htons(ETH_P_IPV6)): 1187 return __br_multicast_querier_exists(brmctx, 1188 &brmctx->ip6_other_query, true); 1189 #endif 1190 default: 1191 return !!mdb && br_group_is_l2(&mdb->addr); 1192 } 1193 } 1194 1195 static inline bool br_multicast_is_star_g(const struct br_ip *ip) 1196 { 1197 switch (ip->proto) { 1198 case htons(ETH_P_IP): 1199 return ipv4_is_zeronet(ip->src.ip4); 1200 #if IS_ENABLED(CONFIG_IPV6) 1201 case htons(ETH_P_IPV6): 1202 return ipv6_addr_any(&ip->src.ip6); 1203 #endif 1204 default: 1205 return false; 1206 } 1207 } 1208 1209 static inline bool 1210 br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx, 1211 __be16 proto) 1212 { 1213 switch (proto) { 1214 case htons(ETH_P_IP): 1215 return !!(brmctx->multicast_igmp_version == 3); 1216 #if IS_ENABLED(CONFIG_IPV6) 1217 case htons(ETH_P_IPV6): 1218 return !!(brmctx->multicast_mld_version == 2); 1219 #endif 1220 default: 1221 return false; 1222 } 1223 } 1224 1225 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1226 { 1227 return BR_INPUT_SKB_CB(skb)->igmp; 1228 } 1229 1230 static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx) 1231 { 1232 return brmctx->multicast_last_member_interval * 1233 brmctx->multicast_last_member_count; 1234 } 1235 1236 static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx) 1237 { 1238 return brmctx->multicast_membership_interval; 1239 } 1240 1241 static inline bool 1242 br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx) 1243 { 1244 return !!brmctx->vlan; 1245 } 1246 1247 static inline bool 1248 br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx) 1249 { 1250 return !!pmctx->vlan; 1251 } 1252 1253 static inline struct net_bridge_mcast * 1254 br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx) 1255 { 1256 if (!br_multicast_port_ctx_is_vlan(pmctx)) 1257 return &pmctx->port->br->multicast_ctx; 1258 else 1259 return &pmctx->vlan->brvlan->br_mcast_ctx; 1260 } 1261 1262 static inline bool 1263 br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx) 1264 { 1265 return br_multicast_ctx_is_vlan(brmctx) && 1266 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) || 1267 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED)); 1268 } 1269 1270 static inline bool 1271 br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx) 1272 { 1273 return br_multicast_ctx_is_vlan(brmctx) && 1274 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1275 } 1276 1277 static inline bool 1278 br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx) 1279 { 1280 return br_multicast_port_ctx_is_vlan(pmctx) && 1281 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED); 1282 } 1283 1284 static inline bool 1285 br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx) 1286 { 1287 return pmctx->port->state == BR_STATE_DISABLED || 1288 (br_multicast_port_ctx_is_vlan(pmctx) && 1289 (br_multicast_port_ctx_vlan_disabled(pmctx) || 1290 pmctx->vlan->state == BR_STATE_DISABLED)); 1291 } 1292 1293 static inline bool 1294 br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx) 1295 { 1296 return br_multicast_port_ctx_state_disabled(pmctx) || 1297 pmctx->port->state == BR_STATE_BLOCKING || 1298 (br_multicast_port_ctx_is_vlan(pmctx) && 1299 pmctx->vlan->state == BR_STATE_BLOCKING); 1300 } 1301 1302 static inline bool 1303 br_rports_have_mc_router(const struct net_bridge_mcast *brmctx) 1304 { 1305 #if IS_ENABLED(CONFIG_IPV6) 1306 return !hlist_empty(&brmctx->ip4_mc_router_list) || 1307 !hlist_empty(&brmctx->ip6_mc_router_list); 1308 #else 1309 return !hlist_empty(&brmctx->ip4_mc_router_list); 1310 #endif 1311 } 1312 1313 static inline bool 1314 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1315 const struct net_bridge_mcast *brmctx2) 1316 { 1317 return brmctx1->multicast_igmp_version == 1318 brmctx2->multicast_igmp_version && 1319 brmctx1->multicast_last_member_count == 1320 brmctx2->multicast_last_member_count && 1321 brmctx1->multicast_startup_query_count == 1322 brmctx2->multicast_startup_query_count && 1323 brmctx1->multicast_last_member_interval == 1324 brmctx2->multicast_last_member_interval && 1325 brmctx1->multicast_membership_interval == 1326 brmctx2->multicast_membership_interval && 1327 brmctx1->multicast_querier_interval == 1328 brmctx2->multicast_querier_interval && 1329 brmctx1->multicast_query_interval == 1330 brmctx2->multicast_query_interval && 1331 brmctx1->multicast_query_response_interval == 1332 brmctx2->multicast_query_response_interval && 1333 brmctx1->multicast_startup_query_interval == 1334 brmctx2->multicast_startup_query_interval && 1335 brmctx1->multicast_querier == brmctx2->multicast_querier && 1336 brmctx1->multicast_router == brmctx2->multicast_router && 1337 !br_rports_have_mc_router(brmctx1) && 1338 !br_rports_have_mc_router(brmctx2) && 1339 #if IS_ENABLED(CONFIG_IPV6) 1340 brmctx1->multicast_mld_version == 1341 brmctx2->multicast_mld_version && 1342 #endif 1343 true; 1344 } 1345 1346 static inline bool 1347 br_multicast_port_ctx_options_equal(const struct net_bridge_mcast_port *pmctx1, 1348 const struct net_bridge_mcast_port *pmctx2) 1349 { 1350 return br_multicast_ngroups_get(pmctx1) == 1351 br_multicast_ngroups_get(pmctx2) && 1352 br_multicast_ngroups_get_max(pmctx1) == 1353 br_multicast_ngroups_get_max(pmctx2); 1354 } 1355 1356 static inline bool 1357 br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx) 1358 { 1359 bool vlan_snooping_enabled; 1360 1361 vlan_snooping_enabled = !!br_opt_get(brmctx->br, 1362 BROPT_MCAST_VLAN_SNOOPING_ENABLED); 1363 1364 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx)); 1365 } 1366 1367 static inline void 1368 br_multicast_set_pg_offload_flags(struct net_bridge_port_group *p, 1369 bool offloaded) 1370 { 1371 p->flags &= ~(MDB_PG_FLAGS_OFFLOAD | MDB_PG_FLAGS_OFFLOAD_FAILED); 1372 p->flags |= (offloaded ? MDB_PG_FLAGS_OFFLOAD : 1373 MDB_PG_FLAGS_OFFLOAD_FAILED); 1374 } 1375 1376 static inline bool 1377 br_mdb_should_notify(const struct net_bridge *br, u8 changed_flags) 1378 { 1379 return br_opt_get(br, BROPT_MDB_OFFLOAD_FAIL_NOTIFICATION) && 1380 (changed_flags & MDB_PG_FLAGS_OFFLOAD_FAILED); 1381 } 1382 #else 1383 static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx, 1384 struct net_bridge_mcast_port **pmctx, 1385 struct net_bridge_vlan *vlan, 1386 struct sk_buff *skb, 1387 u16 vid) 1388 { 1389 return 0; 1390 } 1391 1392 static inline struct net_bridge_mdb_entry * 1393 br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb, 1394 u16 vid) 1395 { 1396 return NULL; 1397 } 1398 1399 static inline int br_multicast_add_port(struct net_bridge_port *port) 1400 { 1401 return 0; 1402 } 1403 1404 static inline void br_multicast_del_port(struct net_bridge_port *port) 1405 { 1406 } 1407 1408 static inline void br_multicast_enable_port(struct net_bridge_port *port) 1409 { 1410 } 1411 1412 static inline void br_multicast_disable_port(struct net_bridge_port *port) 1413 { 1414 } 1415 1416 static inline void br_multicast_init(struct net_bridge *br) 1417 { 1418 } 1419 1420 static inline void br_multicast_join_snoopers(struct net_bridge *br) 1421 { 1422 } 1423 1424 static inline void br_multicast_leave_snoopers(struct net_bridge *br) 1425 { 1426 } 1427 1428 static inline void br_multicast_open(struct net_bridge *br) 1429 { 1430 } 1431 1432 static inline void br_multicast_stop(struct net_bridge *br) 1433 { 1434 } 1435 1436 static inline void br_multicast_dev_del(struct net_bridge *br) 1437 { 1438 } 1439 1440 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst, 1441 struct sk_buff *skb, 1442 struct net_bridge_mcast *brmctx, 1443 bool local_rcv, bool local_orig) 1444 { 1445 } 1446 1447 static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx, 1448 struct sk_buff *skb) 1449 { 1450 return false; 1451 } 1452 1453 static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx, 1454 struct ethhdr *eth, 1455 const struct net_bridge_mdb_entry *mdb) 1456 { 1457 return false; 1458 } 1459 1460 static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[], 1461 u16 nlmsg_flags, struct netlink_ext_ack *extack) 1462 { 1463 return -EOPNOTSUPP; 1464 } 1465 1466 static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[], 1467 struct netlink_ext_ack *extack) 1468 { 1469 return -EOPNOTSUPP; 1470 } 1471 1472 static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[], 1473 struct netlink_ext_ack *extack) 1474 { 1475 return -EOPNOTSUPP; 1476 } 1477 1478 static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb, 1479 struct netlink_callback *cb) 1480 { 1481 return 0; 1482 } 1483 1484 static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[], 1485 u32 portid, u32 seq, 1486 struct netlink_ext_ack *extack) 1487 { 1488 return -EOPNOTSUPP; 1489 } 1490 1491 static inline int br_mdb_hash_init(struct net_bridge *br) 1492 { 1493 return 0; 1494 } 1495 1496 static inline void br_mdb_hash_fini(struct net_bridge *br) 1497 { 1498 } 1499 1500 static inline void br_multicast_count(struct net_bridge *br, 1501 const struct net_bridge_port *p, 1502 const struct sk_buff *skb, 1503 u8 type, u8 dir) 1504 { 1505 } 1506 1507 static inline int br_multicast_init_stats(struct net_bridge *br) 1508 { 1509 return 0; 1510 } 1511 1512 static inline void br_multicast_uninit_stats(struct net_bridge *br) 1513 { 1514 } 1515 1516 static inline int br_multicast_igmp_type(const struct sk_buff *skb) 1517 { 1518 return 0; 1519 } 1520 1521 static inline void br_multicast_ctx_init(struct net_bridge *br, 1522 struct net_bridge_vlan *vlan, 1523 struct net_bridge_mcast *brmctx) 1524 { 1525 } 1526 1527 static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx) 1528 { 1529 } 1530 1531 static inline void br_multicast_port_ctx_init(struct net_bridge_port *port, 1532 struct net_bridge_vlan *vlan, 1533 struct net_bridge_mcast_port *pmctx) 1534 { 1535 } 1536 1537 static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx) 1538 { 1539 } 1540 1541 static inline void br_multicast_update_vlan_mcast_ctx(struct net_bridge_vlan *v, 1542 u8 state) 1543 { 1544 } 1545 1546 static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, 1547 bool on) 1548 { 1549 } 1550 1551 static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br, 1552 bool on, 1553 struct netlink_ext_ack *extack) 1554 { 1555 return -EOPNOTSUPP; 1556 } 1557 1558 static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, 1559 bool on) 1560 { 1561 return false; 1562 } 1563 1564 static inline bool 1565 br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1, 1566 const struct net_bridge_mcast *brmctx2) 1567 { 1568 return true; 1569 } 1570 #endif 1571 1572 /* br_vlan.c */ 1573 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1574 bool br_allowed_ingress(const struct net_bridge *br, 1575 struct net_bridge_vlan_group *vg, struct sk_buff *skb, 1576 u16 *vid, u8 *state, 1577 struct net_bridge_vlan **vlan); 1578 bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1579 const struct sk_buff *skb); 1580 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid); 1581 struct sk_buff *br_handle_vlan(struct net_bridge *br, 1582 const struct net_bridge_port *port, 1583 struct net_bridge_vlan_group *vg, 1584 struct sk_buff *skb); 1585 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1586 bool *changed, struct netlink_ext_ack *extack); 1587 int br_vlan_delete(struct net_bridge *br, u16 vid); 1588 void br_vlan_flush(struct net_bridge *br); 1589 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid); 1590 void br_recalculate_fwd_mask(struct net_bridge *br); 1591 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val, 1592 struct netlink_ext_ack *extack); 1593 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto, 1594 struct netlink_ext_ack *extack); 1595 int br_vlan_set_proto(struct net_bridge *br, unsigned long val, 1596 struct netlink_ext_ack *extack); 1597 int br_vlan_set_stats(struct net_bridge *br, unsigned long val); 1598 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val); 1599 int br_vlan_init(struct net_bridge *br); 1600 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val, 1601 struct netlink_ext_ack *extack); 1602 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, 1603 struct netlink_ext_ack *extack); 1604 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1605 bool *changed, struct netlink_ext_ack *extack); 1606 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); 1607 void nbp_vlan_flush(struct net_bridge_port *port); 1608 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack); 1609 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask); 1610 void br_vlan_get_stats(const struct net_bridge_vlan *v, 1611 struct pcpu_sw_netstats *stats); 1612 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event); 1613 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, 1614 void *ptr); 1615 void br_vlan_vlan_upper_event(struct net_device *br_dev, 1616 struct net_device *vlan_dev, 1617 unsigned long event); 1618 int br_vlan_rtnl_init(void); 1619 void br_vlan_rtnl_uninit(void); 1620 void br_vlan_notify(const struct net_bridge *br, 1621 const struct net_bridge_port *p, 1622 u16 vid, u16 vid_range, 1623 int cmd); 1624 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1625 const struct net_bridge_vlan *range_end, 1626 u16 pvid); 1627 1628 void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1629 struct net_device_path_ctx *ctx, 1630 struct net_device_path *path); 1631 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 static inline struct net_bridge_vlan_group *br_vlan_group( 1636 const struct net_bridge *br) 1637 { 1638 return rtnl_dereference(br->vlgrp); 1639 } 1640 1641 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1642 const struct net_bridge_port *p) 1643 { 1644 return rtnl_dereference(p->vlgrp); 1645 } 1646 1647 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1648 const struct net_bridge *br) 1649 { 1650 return rcu_dereference(br->vlgrp); 1651 } 1652 1653 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1654 const struct net_bridge_port *p) 1655 { 1656 return rcu_dereference(p->vlgrp); 1657 } 1658 1659 /* Since bridge now depends on 8021Q module, but the time bridge sees the 1660 * skb, the vlan tag will always be present if the frame was tagged. 1661 */ 1662 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) 1663 { 1664 int err = 0; 1665 1666 if (skb_vlan_tag_present(skb)) { 1667 *vid = skb_vlan_tag_get_id(skb); 1668 } else { 1669 *vid = 0; 1670 err = -EINVAL; 1671 } 1672 1673 return err; 1674 } 1675 1676 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1677 { 1678 if (!vg) 1679 return 0; 1680 1681 smp_rmb(); 1682 return vg->pvid; 1683 } 1684 1685 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1686 { 1687 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags; 1688 } 1689 #else 1690 static inline bool br_allowed_ingress(const struct net_bridge *br, 1691 struct net_bridge_vlan_group *vg, 1692 struct sk_buff *skb, 1693 u16 *vid, u8 *state, 1694 struct net_bridge_vlan **vlan) 1695 1696 { 1697 *vlan = NULL; 1698 return true; 1699 } 1700 1701 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg, 1702 const struct sk_buff *skb) 1703 { 1704 return true; 1705 } 1706 1707 static inline bool br_should_learn(struct net_bridge_port *p, 1708 struct sk_buff *skb, u16 *vid) 1709 { 1710 return true; 1711 } 1712 1713 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br, 1714 const struct net_bridge_port *port, 1715 struct net_bridge_vlan_group *vg, 1716 struct sk_buff *skb) 1717 { 1718 return skb; 1719 } 1720 1721 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, 1722 bool *changed, struct netlink_ext_ack *extack) 1723 { 1724 *changed = false; 1725 return -EOPNOTSUPP; 1726 } 1727 1728 static inline int br_vlan_delete(struct net_bridge *br, u16 vid) 1729 { 1730 return -EOPNOTSUPP; 1731 } 1732 1733 static inline void br_vlan_flush(struct net_bridge *br) 1734 { 1735 } 1736 1737 static inline void br_recalculate_fwd_mask(struct net_bridge *br) 1738 { 1739 } 1740 1741 static inline int br_vlan_init(struct net_bridge *br) 1742 { 1743 return 0; 1744 } 1745 1746 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, 1747 bool *changed, struct netlink_ext_ack *extack) 1748 { 1749 *changed = false; 1750 return -EOPNOTSUPP; 1751 } 1752 1753 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 1754 { 1755 return -EOPNOTSUPP; 1756 } 1757 1758 static inline void nbp_vlan_flush(struct net_bridge_port *port) 1759 { 1760 } 1761 1762 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, 1763 u16 vid) 1764 { 1765 return NULL; 1766 } 1767 1768 static inline int nbp_vlan_init(struct net_bridge_port *port, 1769 struct netlink_ext_ack *extack) 1770 { 1771 return 0; 1772 } 1773 1774 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) 1775 { 1776 return 0; 1777 } 1778 1779 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg) 1780 { 1781 return 0; 1782 } 1783 1784 static inline int br_vlan_filter_toggle(struct net_bridge *br, 1785 unsigned long val, 1786 struct netlink_ext_ack *extack) 1787 { 1788 return -EOPNOTSUPP; 1789 } 1790 1791 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p, 1792 u32 filter_mask) 1793 { 1794 return 0; 1795 } 1796 1797 static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br, 1798 struct net_device_path_ctx *ctx, 1799 struct net_device_path *path) 1800 { 1801 } 1802 1803 static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br, 1804 struct net_bridge_port *dst, 1805 struct net_device_path *path) 1806 { 1807 return 0; 1808 } 1809 1810 static inline struct net_bridge_vlan_group *br_vlan_group( 1811 const struct net_bridge *br) 1812 { 1813 return NULL; 1814 } 1815 1816 static inline struct net_bridge_vlan_group *nbp_vlan_group( 1817 const struct net_bridge_port *p) 1818 { 1819 return NULL; 1820 } 1821 1822 static inline struct net_bridge_vlan_group *br_vlan_group_rcu( 1823 const struct net_bridge *br) 1824 { 1825 return NULL; 1826 } 1827 1828 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu( 1829 const struct net_bridge_port *p) 1830 { 1831 return NULL; 1832 } 1833 1834 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v, 1835 struct pcpu_sw_netstats *stats) 1836 { 1837 } 1838 1839 static inline void br_vlan_port_event(struct net_bridge_port *p, 1840 unsigned long event) 1841 { 1842 } 1843 1844 static inline int br_vlan_bridge_event(struct net_device *dev, 1845 unsigned long event, void *ptr) 1846 { 1847 return 0; 1848 } 1849 1850 static inline void br_vlan_vlan_upper_event(struct net_device *br_dev, 1851 struct net_device *vlan_dev, 1852 unsigned long event) 1853 { 1854 } 1855 1856 static inline int br_vlan_rtnl_init(void) 1857 { 1858 return 0; 1859 } 1860 1861 static inline void br_vlan_rtnl_uninit(void) 1862 { 1863 } 1864 1865 static inline void br_vlan_notify(const struct net_bridge *br, 1866 const struct net_bridge_port *p, 1867 u16 vid, u16 vid_range, 1868 int cmd) 1869 { 1870 } 1871 1872 static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, 1873 const struct net_bridge_vlan *range_end, 1874 u16 pvid) 1875 { 1876 return true; 1877 } 1878 1879 static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid) 1880 { 1881 return 0; 1882 } 1883 1884 #endif 1885 1886 /* br_vlan_options.c */ 1887 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1888 bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr, 1889 const struct net_bridge_vlan *range_end); 1890 bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v, 1891 const struct net_bridge_port *p); 1892 size_t br_vlan_opts_nl_size(void); 1893 int br_vlan_process_options(const struct net_bridge *br, 1894 const struct net_bridge_port *p, 1895 struct net_bridge_vlan *range_start, 1896 struct net_bridge_vlan *range_end, 1897 struct nlattr **tb, 1898 struct netlink_ext_ack *extack); 1899 int br_vlan_rtm_process_global_options(struct net_device *dev, 1900 const struct nlattr *attr, 1901 int cmd, 1902 struct netlink_ext_ack *extack); 1903 bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr, 1904 const struct net_bridge_vlan *r_end); 1905 bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range, 1906 const struct net_bridge_vlan *v_opts); 1907 1908 /* vlan state manipulation helpers using *_ONCE to annotate lock-free access, 1909 * while br_vlan_set_state() may access data protected by multicast_lock. 1910 */ 1911 static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v) 1912 { 1913 return READ_ONCE(v->state); 1914 } 1915 1916 static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state) 1917 { 1918 WRITE_ONCE(v->state, state); 1919 br_multicast_update_vlan_mcast_ctx(v, state); 1920 } 1921 1922 static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg) 1923 { 1924 return READ_ONCE(vg->pvid_state); 1925 } 1926 1927 static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg, 1928 u8 state) 1929 { 1930 WRITE_ONCE(vg->pvid_state, state); 1931 } 1932 1933 /* learn_allow is true at ingress and false at egress */ 1934 static inline bool br_vlan_state_allowed(u8 state, bool learn_allow) 1935 { 1936 switch (state) { 1937 case BR_STATE_LEARNING: 1938 return learn_allow; 1939 case BR_STATE_FORWARDING: 1940 return true; 1941 default: 1942 return false; 1943 } 1944 } 1945 #endif 1946 1947 /* br_mst.c */ 1948 #ifdef CONFIG_BRIDGE_VLAN_FILTERING 1949 DECLARE_STATIC_KEY_FALSE(br_mst_used); 1950 static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1951 { 1952 /* check the port's vlan group to avoid racing with port deletion */ 1953 return static_branch_unlikely(&br_mst_used) && 1954 br_opt_get(p->br, BROPT_MST_ENABLED) && 1955 rcu_access_pointer(p->vlgrp); 1956 } 1957 1958 int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state, 1959 struct netlink_ext_ack *extack); 1960 int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti); 1961 void br_mst_vlan_init_state(struct net_bridge_vlan *v); 1962 int br_mst_set_enabled(struct net_bridge *br, bool on, 1963 struct netlink_ext_ack *extack); 1964 size_t br_mst_info_size(const struct net_bridge_vlan_group *vg); 1965 int br_mst_fill_info(struct sk_buff *skb, 1966 const struct net_bridge_vlan_group *vg); 1967 int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr, 1968 struct netlink_ext_ack *extack); 1969 void br_mst_uninit(struct net_bridge *br); 1970 #else 1971 static inline bool br_mst_is_enabled(const struct net_bridge_port *p) 1972 { 1973 return false; 1974 } 1975 1976 static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti, 1977 u8 state, struct netlink_ext_ack *extack) 1978 { 1979 return -EOPNOTSUPP; 1980 } 1981 1982 static inline int br_mst_set_enabled(struct net_bridge *br, bool on, 1983 struct netlink_ext_ack *extack) 1984 { 1985 return -EOPNOTSUPP; 1986 } 1987 1988 static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg) 1989 { 1990 return 0; 1991 } 1992 1993 static inline int br_mst_fill_info(struct sk_buff *skb, 1994 const struct net_bridge_vlan_group *vg) 1995 { 1996 return -EOPNOTSUPP; 1997 } 1998 1999 static inline int br_mst_process(struct net_bridge_port *p, 2000 const struct nlattr *mst_attr, 2001 struct netlink_ext_ack *extack) 2002 { 2003 return -EOPNOTSUPP; 2004 } 2005 2006 static inline void br_mst_uninit(struct net_bridge *br) 2007 { 2008 } 2009 #endif 2010 2011 struct nf_br_ops { 2012 int (*br_dev_xmit_hook)(struct sk_buff *skb); 2013 }; 2014 extern const struct nf_br_ops __rcu *nf_br_ops; 2015 2016 /* br_netfilter.c */ 2017 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) 2018 int br_nf_core_init(void); 2019 void br_nf_core_fini(void); 2020 void br_netfilter_rtable_init(struct net_bridge *); 2021 #else 2022 static inline int br_nf_core_init(void) { return 0; } 2023 static inline void br_nf_core_fini(void) {} 2024 #define br_netfilter_rtable_init(x) 2025 #endif 2026 2027 /* br_stp.c */ 2028 void br_set_state(struct net_bridge_port *p, unsigned int state); 2029 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no); 2030 void br_init_port(struct net_bridge_port *p); 2031 void br_become_designated_port(struct net_bridge_port *p); 2032 2033 void __br_set_forward_delay(struct net_bridge *br, unsigned long t); 2034 int br_set_forward_delay(struct net_bridge *br, unsigned long x); 2035 int br_set_hello_time(struct net_bridge *br, unsigned long x); 2036 int br_set_max_age(struct net_bridge *br, unsigned long x); 2037 int __set_ageing_time(struct net_device *dev, unsigned long t); 2038 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time); 2039 2040 2041 /* br_stp_if.c */ 2042 void br_stp_enable_bridge(struct net_bridge *br); 2043 void br_stp_disable_bridge(struct net_bridge *br); 2044 int br_stp_set_enabled(struct net_bridge *br, unsigned long val, 2045 struct netlink_ext_ack *extack); 2046 void br_stp_enable_port(struct net_bridge_port *p); 2047 void br_stp_disable_port(struct net_bridge_port *p); 2048 bool br_stp_recalculate_bridge_id(struct net_bridge *br); 2049 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 2050 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); 2051 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio); 2052 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost); 2053 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 2054 2055 /* br_stp_bpdu.c */ 2056 struct stp_proto; 2057 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 2058 struct net_device *dev); 2059 2060 /* br_stp_timer.c */ 2061 void br_stp_timer_init(struct net_bridge *br); 2062 void br_stp_port_timer_init(struct net_bridge_port *p); 2063 unsigned long br_timer_value(const struct timer_list *timer); 2064 2065 /* br.c */ 2066 2067 /* br_mrp.c */ 2068 #if IS_ENABLED(CONFIG_BRIDGE_MRP) 2069 int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, 2070 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2071 bool br_mrp_enabled(struct net_bridge *br); 2072 void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); 2073 int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); 2074 int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); 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 static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) 2099 { 2100 return 0; 2101 } 2102 2103 #endif 2104 2105 /* br_cfm.c */ 2106 #if IS_ENABLED(CONFIG_BRIDGE_CFM) 2107 int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2108 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); 2109 bool br_cfm_created(struct net_bridge *br); 2110 void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p); 2111 int br_cfm_frame_rx(struct net_bridge_port *port, struct sk_buff *skb); 2112 int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br); 2113 int br_cfm_status_fill_info(struct sk_buff *skb, 2114 struct net_bridge *br, 2115 bool getlink); 2116 int br_cfm_mep_count(struct net_bridge *br, u32 *count); 2117 int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count); 2118 #else 2119 static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p, 2120 struct nlattr *attr, int cmd, 2121 struct netlink_ext_ack *extack) 2122 { 2123 return -EOPNOTSUPP; 2124 } 2125 2126 static inline bool br_cfm_created(struct net_bridge *br) 2127 { 2128 return false; 2129 } 2130 2131 static inline void br_cfm_port_del(struct net_bridge *br, 2132 struct net_bridge_port *p) 2133 { 2134 } 2135 2136 static inline int br_cfm_frame_rx(struct net_bridge_port *port, 2137 struct sk_buff *skb) 2138 { 2139 return 0; 2140 } 2141 2142 static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br) 2143 { 2144 return -EOPNOTSUPP; 2145 } 2146 2147 static inline int br_cfm_status_fill_info(struct sk_buff *skb, 2148 struct net_bridge *br, 2149 bool getlink) 2150 { 2151 return -EOPNOTSUPP; 2152 } 2153 2154 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count) 2155 { 2156 *count = 0; 2157 return -EOPNOTSUPP; 2158 } 2159 2160 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count) 2161 { 2162 *count = 0; 2163 return -EOPNOTSUPP; 2164 } 2165 #endif 2166 2167 /* br_netlink.c */ 2168 extern struct rtnl_link_ops br_link_ops; 2169 int br_netlink_init(void); 2170 void br_netlink_fini(void); 2171 void br_ifinfo_notify(int event, const struct net_bridge *br, 2172 const struct net_bridge_port *port); 2173 void br_info_notify(int event, const struct net_bridge *br, 2174 const struct net_bridge_port *port, u32 filter); 2175 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags, 2176 struct netlink_ext_ack *extack); 2177 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags); 2178 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, 2179 u32 filter_mask, int nlflags); 2180 int br_process_vlan_info(struct net_bridge *br, 2181 struct net_bridge_port *p, int cmd, 2182 struct bridge_vlan_info *vinfo_curr, 2183 struct bridge_vlan_info **vinfo_last, 2184 bool *changed, 2185 struct netlink_ext_ack *extack); 2186 2187 #ifdef CONFIG_SYSFS 2188 /* br_sysfs_if.c */ 2189 extern const struct sysfs_ops brport_sysfs_ops; 2190 int br_sysfs_addif(struct net_bridge_port *p); 2191 int br_sysfs_renameif(struct net_bridge_port *p); 2192 2193 /* br_sysfs_br.c */ 2194 int br_sysfs_addbr(struct net_device *dev); 2195 void br_sysfs_delbr(struct net_device *dev); 2196 2197 #else 2198 2199 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; } 2200 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; } 2201 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; } 2202 static inline void br_sysfs_delbr(struct net_device *dev) { return; } 2203 #endif /* CONFIG_SYSFS */ 2204 2205 /* br_switchdev.c */ 2206 #ifdef CONFIG_NET_SWITCHDEV 2207 int br_switchdev_port_offload(struct net_bridge_port *p, 2208 struct net_device *dev, const void *ctx, 2209 struct notifier_block *atomic_nb, 2210 struct notifier_block *blocking_nb, 2211 bool tx_fwd_offload, 2212 struct netlink_ext_ack *extack); 2213 2214 void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2215 struct notifier_block *atomic_nb, 2216 struct notifier_block *blocking_nb); 2217 2218 int br_switchdev_port_replay(struct net_bridge_port *p, 2219 struct net_device *dev, const void *ctx, 2220 struct notifier_block *atomic_nb, 2221 struct notifier_block *blocking_nb, 2222 struct netlink_ext_ack *extack); 2223 2224 bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb); 2225 2226 void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb); 2227 2228 void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2229 struct sk_buff *skb); 2230 void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2231 struct sk_buff *skb); 2232 void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2233 struct sk_buff *skb); 2234 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2235 const struct sk_buff *skb); 2236 int br_switchdev_set_port_flag(struct net_bridge_port *p, 2237 unsigned long flags, 2238 unsigned long mask, 2239 struct netlink_ext_ack *extack); 2240 void br_switchdev_fdb_notify(struct net_bridge *br, 2241 const struct net_bridge_fdb_entry *fdb, int type); 2242 void br_switchdev_mdb_notify(struct net_device *dev, 2243 struct net_bridge_mdb_entry *mp, 2244 struct net_bridge_port_group *pg, 2245 int type); 2246 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, 2247 bool changed, struct netlink_ext_ack *extack); 2248 int br_switchdev_port_vlan_no_foreign_add(struct net_device *dev, u16 vid, u16 flags, 2249 bool changed, struct netlink_ext_ack *extack); 2250 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); 2251 void br_switchdev_init(struct net_bridge *br); 2252 2253 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2254 { 2255 skb->offload_fwd_mark = 0; 2256 } 2257 #else 2258 static inline int 2259 br_switchdev_port_offload(struct net_bridge_port *p, 2260 struct net_device *dev, const void *ctx, 2261 struct notifier_block *atomic_nb, 2262 struct notifier_block *blocking_nb, 2263 bool tx_fwd_offload, 2264 struct netlink_ext_ack *extack) 2265 { 2266 return -EOPNOTSUPP; 2267 } 2268 2269 static inline void 2270 br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx, 2271 struct notifier_block *atomic_nb, 2272 struct notifier_block *blocking_nb) 2273 { 2274 } 2275 2276 static inline int 2277 br_switchdev_port_replay(struct net_bridge_port *p, 2278 struct net_device *dev, const void *ctx, 2279 struct notifier_block *atomic_nb, 2280 struct notifier_block *blocking_nb, 2281 struct netlink_ext_ack *extack) 2282 { 2283 return -EOPNOTSUPP; 2284 } 2285 2286 static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb) 2287 { 2288 return false; 2289 } 2290 2291 static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb) 2292 { 2293 } 2294 2295 static inline void 2296 nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p, 2297 struct sk_buff *skb) 2298 { 2299 } 2300 2301 static inline void 2302 nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p, 2303 struct sk_buff *skb) 2304 { 2305 } 2306 2307 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p, 2308 struct sk_buff *skb) 2309 { 2310 } 2311 2312 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p, 2313 const struct sk_buff *skb) 2314 { 2315 return true; 2316 } 2317 2318 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, 2319 unsigned long flags, 2320 unsigned long mask, 2321 struct netlink_ext_ack *extack) 2322 { 2323 return 0; 2324 } 2325 2326 static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, 2327 u16 flags, bool changed, 2328 struct netlink_ext_ack *extack) 2329 { 2330 return -EOPNOTSUPP; 2331 } 2332 2333 static inline int br_switchdev_port_vlan_no_foreign_add(struct net_device *dev, u16 vid, 2334 u16 flags, bool changed, 2335 struct netlink_ext_ack *extack) 2336 { 2337 return -EOPNOTSUPP; 2338 } 2339 2340 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid) 2341 { 2342 return -EOPNOTSUPP; 2343 } 2344 2345 static inline void 2346 br_switchdev_fdb_notify(struct net_bridge *br, 2347 const struct net_bridge_fdb_entry *fdb, int type) 2348 { 2349 } 2350 2351 static inline void br_switchdev_mdb_notify(struct net_device *dev, 2352 struct net_bridge_mdb_entry *mp, 2353 struct net_bridge_port_group *pg, 2354 int type) 2355 { 2356 } 2357 2358 static inline void br_switchdev_frame_unmark(struct sk_buff *skb) 2359 { 2360 } 2361 2362 static inline void br_switchdev_init(struct net_bridge *br) 2363 { 2364 } 2365 2366 #endif /* CONFIG_NET_SWITCHDEV */ 2367 2368 /* br_arp_nd_proxy.c */ 2369 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br); 2370 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br, 2371 u16 vid, struct net_bridge_port *p); 2372 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br, 2373 u16 vid, struct net_bridge_port *p, struct nd_msg *msg); 2374 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb); 2375 bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid); 2376 bool br_is_neigh_forward_grat_enabled(const struct net_bridge_port *p, u16 vid); 2377 #endif 2378