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