1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *	Linux ethernet bridge
   4 *
   5 *	Authors:
   6 *	Lennert Buytenhek		<buytenh@gnu.org>
   7 */
   8
   9#ifndef _BR_PRIVATE_H
  10#define _BR_PRIVATE_H
  11
  12#include <linux/netdevice.h>
  13#include <linux/if_bridge.h>
  14#include <linux/netpoll.h>
  15#include <linux/u64_stats_sync.h>
  16#include <net/route.h>
  17#include <net/ip6_fib.h>
  18#include <linux/if_vlan.h>
  19#include <linux/rhashtable.h>
  20#include <linux/refcount.h>
  21
  22#define BR_HASH_BITS 8
  23#define BR_HASH_SIZE (1 << BR_HASH_BITS)
  24
  25#define BR_HOLD_TIME (1*HZ)
  26
  27#define BR_PORT_BITS	10
  28#define BR_MAX_PORTS	(1<<BR_PORT_BITS)
  29
  30#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
  31#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
  32#define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
  33
  34#define BR_HWDOM_MAX BITS_PER_LONG
  35
  36#define BR_VERSION	"2.3"
  37
  38/* Control of forwarding link local multicast */
  39#define BR_GROUPFWD_DEFAULT	0
  40/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
  41enum {
  42	BR_GROUPFWD_STP		= BIT(0),
  43	BR_GROUPFWD_MACPAUSE	= BIT(1),
  44	BR_GROUPFWD_LACP	= BIT(2),
  45};
  46
  47#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
  48				BR_GROUPFWD_LACP)
  49/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
  50#define BR_GROUPFWD_8021AD	0xB801u
  51
  52/* Path to usermode spanning tree program */
  53#define BR_STP_PROG	"/sbin/bridge-stp"
  54
  55#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
  56
  57typedef struct bridge_id bridge_id;
  58typedef struct mac_addr mac_addr;
  59typedef __u16 port_id;
  60
  61struct bridge_id {
  62	unsigned char	prio[2];
  63	unsigned char	addr[ETH_ALEN];
  64};
  65
  66struct mac_addr {
  67	unsigned char	addr[ETH_ALEN];
  68};
  69
  70#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  71/* our own querier */
  72struct bridge_mcast_own_query {
  73	struct timer_list	timer;
  74	u32			startup_sent;
  75};
  76
  77/* other querier */
  78struct bridge_mcast_other_query {
  79	struct timer_list		timer;
  80	unsigned long			delay_time;
  81};
  82
  83/* selected querier */
  84struct bridge_mcast_querier {
  85	struct br_ip addr;
  86	int port_ifidx;
  87	seqcount_spinlock_t seq;
  88};
  89
  90/* IGMP/MLD statistics */
  91struct bridge_mcast_stats {
  92	struct br_mcast_stats mstats;
  93	struct u64_stats_sync syncp;
  94};
  95
  96struct br_mdb_src_entry {
  97	struct br_ip			addr;
  98};
  99
 100struct br_mdb_config {
 101	struct net_bridge		*br;
 102	struct net_bridge_port		*p;
 103	struct br_mdb_entry		*entry;
 104	struct br_ip			group;
 105	bool				src_entry;
 106	u8				filter_mode;
 107	u16				nlflags;
 108	struct br_mdb_src_entry		*src_entries;
 109	int				num_src_entries;
 110	u8				rt_protocol;
 111};
 112#endif
 113
 114/* net_bridge_mcast_port must be always defined due to forwarding stubs */
 115struct net_bridge_mcast_port {
 116#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 117	struct net_bridge_port		*port;
 118	struct net_bridge_vlan		*vlan;
 119
 120	struct bridge_mcast_own_query	ip4_own_query;
 121	struct timer_list		ip4_mc_router_timer;
 122	struct hlist_node		ip4_rlist;
 123#if IS_ENABLED(CONFIG_IPV6)
 124	struct bridge_mcast_own_query	ip6_own_query;
 125	struct timer_list		ip6_mc_router_timer;
 126	struct hlist_node		ip6_rlist;
 127#endif /* IS_ENABLED(CONFIG_IPV6) */
 128	unsigned char			multicast_router;
 129#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 130};
 131
 132/* net_bridge_mcast must be always defined due to forwarding stubs */
 133struct net_bridge_mcast {
 134#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 135	struct net_bridge		*br;
 136	struct net_bridge_vlan		*vlan;
 137
 138	u32				multicast_last_member_count;
 139	u32				multicast_startup_query_count;
 140
 141	u8				multicast_querier;
 142	u8				multicast_igmp_version;
 143	u8				multicast_router;
 144#if IS_ENABLED(CONFIG_IPV6)
 145	u8				multicast_mld_version;
 146#endif
 147	unsigned long			multicast_last_member_interval;
 148	unsigned long			multicast_membership_interval;
 149	unsigned long			multicast_querier_interval;
 150	unsigned long			multicast_query_interval;
 151	unsigned long			multicast_query_response_interval;
 152	unsigned long			multicast_startup_query_interval;
 153	struct hlist_head		ip4_mc_router_list;
 154	struct timer_list		ip4_mc_router_timer;
 155	struct bridge_mcast_other_query	ip4_other_query;
 156	struct bridge_mcast_own_query	ip4_own_query;
 157	struct bridge_mcast_querier	ip4_querier;
 158#if IS_ENABLED(CONFIG_IPV6)
 159	struct hlist_head		ip6_mc_router_list;
 160	struct timer_list		ip6_mc_router_timer;
 161	struct bridge_mcast_other_query	ip6_other_query;
 162	struct bridge_mcast_own_query	ip6_own_query;
 163	struct bridge_mcast_querier	ip6_querier;
 164#endif /* IS_ENABLED(CONFIG_IPV6) */
 165#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
 166};
 167
 168struct br_tunnel_info {
 169	__be64				tunnel_id;
 170	struct metadata_dst __rcu	*tunnel_dst;
 171};
 172
 173/* private vlan flags */
 174enum {
 175	BR_VLFLAG_PER_PORT_STATS = BIT(0),
 176	BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
 177	BR_VLFLAG_MCAST_ENABLED = BIT(2),
 178	BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
 179};
 180
 181/**
 182 * struct net_bridge_vlan - per-vlan entry
 183 *
 184 * @vnode: rhashtable member
 185 * @vid: VLAN id
 186 * @flags: bridge vlan flags
 187 * @priv_flags: private (in-kernel) bridge vlan flags
 188 * @state: STP state (e.g. blocking, learning, forwarding)
 189 * @stats: per-cpu VLAN statistics
 190 * @br: if MASTER flag set, this points to a bridge struct
 191 * @port: if MASTER flag unset, this points to a port struct
 192 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 193 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 194 *          for this VLAN entry
 195 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
 196 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
 197 *                  context
 198 * @msti: if MASTER flag set, this holds the VLANs MST instance
 199 * @vlist: sorted list of VLAN entries
 200 * @rcu: used for entry destruction
 201 *
 202 * This structure is shared between the global per-VLAN entries contained in
 203 * the bridge rhashtable and the local per-port per-VLAN entries contained in
 204 * the port's rhashtable. The union entries should be interpreted depending on
 205 * the entry flags that are set.
 206 */
 207struct net_bridge_vlan {
 208	struct rhash_head		vnode;
 209	struct rhash_head		tnode;
 210	u16				vid;
 211	u16				flags;
 212	u16				priv_flags;
 213	u8				state;
 214	struct pcpu_sw_netstats __percpu *stats;
 215	union {
 216		struct net_bridge	*br;
 217		struct net_bridge_port	*port;
 218	};
 219	union {
 220		refcount_t		refcnt;
 221		struct net_bridge_vlan	*brvlan;
 222	};
 223
 224	struct br_tunnel_info		tinfo;
 225
 226	union {
 227		struct net_bridge_mcast		br_mcast_ctx;
 228		struct net_bridge_mcast_port	port_mcast_ctx;
 229	};
 230
 231	u16				msti;
 232
 233	struct list_head		vlist;
 234
 235	struct rcu_head			rcu;
 236};
 237
 238/**
 239 * struct net_bridge_vlan_group
 240 *
 241 * @vlan_hash: VLAN entry rhashtable
 242 * @vlan_list: sorted VLAN entry list
 243 * @num_vlans: number of total VLAN entries
 244 * @pvid: PVID VLAN id
 245 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
 246 *
 247 * IMPORTANT: Be careful when checking if there're VLAN entries using list
 248 *            primitives because the bridge can have entries in its list which
 249 *            are just for global context but not for filtering, i.e. they have
 250 *            the master flag set but not the brentry flag. If you have to check
 251 *            if there're "real" entries in the bridge please test @num_vlans
 252 */
 253struct net_bridge_vlan_group {
 254	struct rhashtable		vlan_hash;
 255	struct rhashtable		tunnel_hash;
 256	struct list_head		vlan_list;
 257	u16				num_vlans;
 258	u16				pvid;
 259	u8				pvid_state;
 260};
 261
 262/* bridge fdb flags */
 263enum {
 264	BR_FDB_LOCAL,
 265	BR_FDB_STATIC,
 266	BR_FDB_STICKY,
 267	BR_FDB_ADDED_BY_USER,
 268	BR_FDB_ADDED_BY_EXT_LEARN,
 269	BR_FDB_OFFLOADED,
 270	BR_FDB_NOTIFY,
 271	BR_FDB_NOTIFY_INACTIVE,
 272	BR_FDB_LOCKED,
 273};
 274
 275struct net_bridge_fdb_key {
 276	mac_addr addr;
 277	u16 vlan_id;
 278};
 279
 280struct net_bridge_fdb_entry {
 281	struct rhash_head		rhnode;
 282	struct net_bridge_port		*dst;
 283
 284	struct net_bridge_fdb_key	key;
 285	struct hlist_node		fdb_node;
 286	unsigned long			flags;
 287
 288	/* write-heavy members should not affect lookups */
 289	unsigned long			updated ____cacheline_aligned_in_smp;
 290	unsigned long			used;
 291
 292	struct rcu_head			rcu;
 293};
 294
 295struct net_bridge_fdb_flush_desc {
 296	unsigned long			flags;
 297	unsigned long			flags_mask;
 298	int				port_ifindex;
 299	u16				vlan_id;
 300};
 301
 302#define MDB_PG_FLAGS_PERMANENT	BIT(0)
 303#define MDB_PG_FLAGS_OFFLOAD	BIT(1)
 304#define MDB_PG_FLAGS_FAST_LEAVE	BIT(2)
 305#define MDB_PG_FLAGS_STAR_EXCL	BIT(3)
 306#define MDB_PG_FLAGS_BLOCKED	BIT(4)
 307
 308#define PG_SRC_ENT_LIMIT	32
 309
 310#define BR_SGRP_F_DELETE	BIT(0)
 311#define BR_SGRP_F_SEND		BIT(1)
 312#define BR_SGRP_F_INSTALLED	BIT(2)
 313#define BR_SGRP_F_USER_ADDED	BIT(3)
 314
 315struct net_bridge_mcast_gc {
 316	struct hlist_node		gc_node;
 317	void				(*destroy)(struct net_bridge_mcast_gc *gc);
 318};
 319
 320struct net_bridge_group_src {
 321	struct hlist_node		node;
 322
 323	struct br_ip			addr;
 324	struct net_bridge_port_group	*pg;
 325	u8				flags;
 326	u8				src_query_rexmit_cnt;
 327	struct timer_list		timer;
 328
 329	struct net_bridge		*br;
 330	struct net_bridge_mcast_gc	mcast_gc;
 331	struct rcu_head			rcu;
 332};
 333
 334struct net_bridge_port_group_sg_key {
 335	struct net_bridge_port		*port;
 336	struct br_ip			addr;
 337};
 338
 339struct net_bridge_port_group {
 340	struct net_bridge_port_group __rcu *next;
 341	struct net_bridge_port_group_sg_key key;
 342	unsigned char			eth_addr[ETH_ALEN] __aligned(2);
 343	unsigned char			flags;
 344	unsigned char			filter_mode;
 345	unsigned char			grp_query_rexmit_cnt;
 346	unsigned char			rt_protocol;
 347
 348	struct hlist_head		src_list;
 349	unsigned int			src_ents;
 350	struct timer_list		timer;
 351	struct timer_list		rexmit_timer;
 352	struct hlist_node		mglist;
 353	struct rb_root			eht_set_tree;
 354	struct rb_root			eht_host_tree;
 355
 356	struct rhash_head		rhnode;
 357	struct net_bridge_mcast_gc	mcast_gc;
 358	struct rcu_head			rcu;
 359};
 360
 361struct net_bridge_mdb_entry {
 362	struct rhash_head		rhnode;
 363	struct net_bridge		*br;
 364	struct net_bridge_port_group __rcu *ports;
 365	struct br_ip			addr;
 366	bool				host_joined;
 367
 368	struct timer_list		timer;
 369	struct hlist_node		mdb_node;
 370
 371	struct net_bridge_mcast_gc	mcast_gc;
 372	struct rcu_head			rcu;
 373};
 374
 375struct net_bridge_port {
 376	struct net_bridge		*br;
 377	struct net_device		*dev;
 378	netdevice_tracker		dev_tracker;
 379	struct list_head		list;
 380
 381	unsigned long			flags;
 382#ifdef CONFIG_BRIDGE_VLAN_FILTERING
 383	struct net_bridge_vlan_group	__rcu *vlgrp;
 384#endif
 385	struct net_bridge_port		__rcu *backup_port;
 386
 387	/* STP */
 388	u8				priority;
 389	u8				state;
 390	u16				port_no;
 391	unsigned char			topology_change_ack;
 392	unsigned char			config_pending;
 393	port_id				port_id;
 394	port_id				designated_port;
 395	bridge_id			designated_root;
 396	bridge_id			designated_bridge;
 397	u32				path_cost;
 398	u32				designated_cost;
 399	unsigned long			designated_age;
 400
 401	struct timer_list		forward_delay_timer;
 402	struct timer_list		hold_timer;
 403	struct timer_list		message_age_timer;
 404	struct kobject			kobj;
 405	struct rcu_head			rcu;
 406
 407	struct net_bridge_mcast_port	multicast_ctx;
 408
 409#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 410	struct bridge_mcast_stats	__percpu *mcast_stats;
 411
 
 
 
 
 
 
 412	u32				multicast_eht_hosts_limit;
 413	u32				multicast_eht_hosts_cnt;
 
 
 414	struct hlist_head		mglist;
 415#endif
 416
 417#ifdef CONFIG_SYSFS
 418	char				sysfs_name[IFNAMSIZ];
 419#endif
 420
 421#ifdef CONFIG_NET_POLL_CONTROLLER
 422	struct netpoll			*np;
 423#endif
 424#ifdef CONFIG_NET_SWITCHDEV
 425	/* Identifier used to group ports that share the same switchdev
 426	 * hardware domain.
 427	 */
 428	int				hwdom;
 429	int				offload_count;
 430	struct netdev_phys_item_id	ppid;
 431#endif
 432	u16				group_fwd_mask;
 433	u16				backup_redirected_cnt;
 434
 435	struct bridge_stp_xstats	stp_xstats;
 436};
 437
 438#define kobj_to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)
 439
 440#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
 441#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
 442
 443static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
 444{
 445	return rcu_dereference(dev->rx_handler_data);
 446}
 447
 448static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
 449{
 450	return netif_is_bridge_port(dev) ?
 451		rtnl_dereference(dev->rx_handler_data) : NULL;
 452}
 453
 454static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
 455{
 456	return netif_is_bridge_port(dev) ?
 457		rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
 458}
 459
 460enum net_bridge_opts {
 461	BROPT_VLAN_ENABLED,
 462	BROPT_VLAN_STATS_ENABLED,
 463	BROPT_NF_CALL_IPTABLES,
 464	BROPT_NF_CALL_IP6TABLES,
 465	BROPT_NF_CALL_ARPTABLES,
 466	BROPT_GROUP_ADDR_SET,
 467	BROPT_MULTICAST_ENABLED,
 
 468	BROPT_MULTICAST_QUERY_USE_IFADDR,
 469	BROPT_MULTICAST_STATS_ENABLED,
 470	BROPT_HAS_IPV6_ADDR,
 471	BROPT_NEIGH_SUPPRESS_ENABLED,
 472	BROPT_MTU_SET_BY_USER,
 473	BROPT_VLAN_STATS_PER_PORT,
 474	BROPT_NO_LL_LEARN,
 475	BROPT_VLAN_BRIDGE_BINDING,
 476	BROPT_MCAST_VLAN_SNOOPING_ENABLED,
 477	BROPT_MST_ENABLED,
 478};
 479
 480struct net_bridge {
 481	spinlock_t			lock;
 482	spinlock_t			hash_lock;
 483	struct hlist_head		frame_type_list;
 484	struct net_device		*dev;
 485	unsigned long			options;
 486	/* These fields are accessed on each packet */
 487#ifdef CONFIG_BRIDGE_VLAN_FILTERING
 488	__be16				vlan_proto;
 489	u16				default_pvid;
 490	struct net_bridge_vlan_group	__rcu *vlgrp;
 491#endif
 492
 493	struct rhashtable		fdb_hash_tbl;
 494	struct list_head		port_list;
 495#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
 496	union {
 497		struct rtable		fake_rtable;
 498		struct rt6_info		fake_rt6_info;
 499	};
 500#endif
 501	u16				group_fwd_mask;
 502	u16				group_fwd_mask_required;
 503
 504	/* STP */
 505	bridge_id			designated_root;
 506	bridge_id			bridge_id;
 507	unsigned char			topology_change;
 508	unsigned char			topology_change_detected;
 509	u16				root_port;
 510	unsigned long			max_age;
 511	unsigned long			hello_time;
 512	unsigned long			forward_delay;
 513	unsigned long			ageing_time;
 514	unsigned long			bridge_max_age;
 515	unsigned long			bridge_hello_time;
 516	unsigned long			bridge_forward_delay;
 517	unsigned long			bridge_ageing_time;
 518	u32				root_path_cost;
 519
 520	u8				group_addr[ETH_ALEN];
 521
 522	enum {
 523		BR_NO_STP, 		/* no spanning tree */
 524		BR_KERNEL_STP,		/* old STP in kernel */
 525		BR_USER_STP,		/* new RSTP in userspace */
 526	} stp_enabled;
 527
 528	struct net_bridge_mcast		multicast_ctx;
 529
 530#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 531	struct bridge_mcast_stats	__percpu *mcast_stats;
 532
 533	u32				hash_max;
 534
 
 
 
 
 
 
 
 
 535	spinlock_t			multicast_lock;
 
 
 
 
 
 
 536
 537	struct rhashtable		mdb_hash_tbl;
 538	struct rhashtable		sg_port_tbl;
 539
 540	struct hlist_head		mcast_gc_list;
 541	struct hlist_head		mdb_list;
 542
 
 
 
 
 
 
 
 
 
 
 
 
 
 543	struct work_struct		mcast_gc_work;
 544#endif
 545
 546	struct timer_list		hello_timer;
 547	struct timer_list		tcn_timer;
 548	struct timer_list		topology_change_timer;
 549	struct delayed_work		gc_work;
 550	struct kobject			*ifobj;
 551	u32				auto_cnt;
 552
 553#ifdef CONFIG_NET_SWITCHDEV
 554	/* Counter used to make sure that hardware domains get unique
 555	 * identifiers in case a bridge spans multiple switchdev instances.
 556	 */
 557	int				last_hwdom;
 558	/* Bit mask of hardware domain numbers in use */
 559	unsigned long			busy_hwdoms;
 560#endif
 561	struct hlist_head		fdb_list;
 562
 563#if IS_ENABLED(CONFIG_BRIDGE_MRP)
 564	struct hlist_head		mrp_list;
 565#endif
 566#if IS_ENABLED(CONFIG_BRIDGE_CFM)
 567	struct hlist_head		mep_list;
 568#endif
 569};
 570
 571struct br_input_skb_cb {
 572	struct net_device *brdev;
 573
 574	u16 frag_max_size;
 575#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 576	u8 igmp;
 577	u8 mrouters_only:1;
 578#endif
 579	u8 proxyarp_replied:1;
 580	u8 src_port_isolated:1;
 581#ifdef CONFIG_BRIDGE_VLAN_FILTERING
 582	u8 vlan_filtered:1;
 583#endif
 584#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 585	u8 br_netfilter_broute:1;
 586#endif
 587
 588#ifdef CONFIG_NET_SWITCHDEV
 589	/* Set if TX data plane offloading is used towards at least one
 590	 * hardware domain.
 591	 */
 592	u8 tx_fwd_offload:1;
 593	/* The switchdev hardware domain from which this packet was received.
 594	 * If skb->offload_fwd_mark was set, then this packet was already
 595	 * forwarded by hardware to the other ports in the source hardware
 596	 * domain, otherwise it wasn't.
 597	 */
 598	int src_hwdom;
 599	/* Bit mask of hardware domains towards this packet has already been
 600	 * transmitted using the TX data plane offload.
 601	 */
 602	unsigned long fwd_hwdoms;
 603#endif
 604};
 605
 606#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
 607
 608#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 609# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
 610#else
 611# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
 612#endif
 613
 614#define br_printk(level, br, format, args...)	\
 615	printk(level "%s: " format, (br)->dev->name, ##args)
 616
 617#define br_err(__br, format, args...)			\
 618	br_printk(KERN_ERR, __br, format, ##args)
 619#define br_warn(__br, format, args...)			\
 620	br_printk(KERN_WARNING, __br, format, ##args)
 621#define br_notice(__br, format, args...)		\
 622	br_printk(KERN_NOTICE, __br, format, ##args)
 623#define br_info(__br, format, args...)			\
 624	br_printk(KERN_INFO, __br, format, ##args)
 625
 626#define br_debug(br, format, args...)			\
 627	pr_debug("%s: " format,  (br)->dev->name, ##args)
 628
 629/* called under bridge lock */
 630static inline int br_is_root_bridge(const struct net_bridge *br)
 631{
 632	return !memcmp(&br->bridge_id, &br->designated_root, 8);
 633}
 634
 635/* check if a VLAN entry is global */
 636static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 637{
 638	return v->flags & BRIDGE_VLAN_INFO_MASTER;
 639}
 640
 641/* check if a VLAN entry is used by the bridge */
 642static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 643{
 644	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 645}
 646
 647/* check if we should use the vlan entry, returns false if it's only context */
 648static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 649{
 650	if (br_vlan_is_master(v)) {
 651		if (br_vlan_is_brentry(v))
 652			return true;
 653		else
 654			return false;
 655	}
 656
 657	return true;
 658}
 659
 660static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 661{
 662	return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 663}
 664
 665static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 666{
 667	bool ret = vid > 0 && vid < VLAN_VID_MASK;
 668
 669	if (!ret)
 670		NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 671
 672	return ret;
 673}
 674
 675static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 676				       const struct bridge_vlan_info *last,
 677				       struct netlink_ext_ack *extack)
 678{
 679	/* pvid flag is not allowed in ranges */
 680	if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 681		NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 682		return false;
 683	}
 684
 685	/* when cur is the range end, check if:
 686	 *  - it has range start flag
 687	 *  - range ids are invalid (end is equal to or before start)
 688	 */
 689	if (last) {
 690		if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 691			NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 692			return false;
 693		} else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 694			NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 695			return false;
 696		} else if (cur->vid <= last->vid) {
 697			NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 698			return false;
 699		}
 700	}
 701
 702	/* check for required range flags */
 703	if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 704			    BRIDGE_VLAN_INFO_RANGE_END))) {
 705		NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 706		return false;
 707	}
 708
 709	return true;
 710}
 711
 712static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 713{
 714	u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 715
 716#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 717	if (!br_vlan_is_master(v))
 718		mcast_router = v->port_mcast_ctx.multicast_router;
 719	else
 720		mcast_router = v->br_mcast_ctx.multicast_router;
 721#endif
 722
 723	return mcast_router;
 724}
 725
 726static inline int br_afspec_cmd_to_rtm(int cmd)
 727{
 728	switch (cmd) {
 729	case RTM_SETLINK:
 730		return RTM_NEWVLAN;
 731	case RTM_DELLINK:
 732		return RTM_DELVLAN;
 733	}
 734
 735	return 0;
 736}
 737
 738static inline int br_opt_get(const struct net_bridge *br,
 739			     enum net_bridge_opts opt)
 740{
 741	return test_bit(opt, &br->options);
 742}
 743
 744int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 745		      struct netlink_ext_ack *extack);
 746int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 747int br_boolopt_multi_toggle(struct net_bridge *br,
 748			    struct br_boolopt_multi *bm,
 749			    struct netlink_ext_ack *extack);
 750void br_boolopt_multi_get(const struct net_bridge *br,
 751			  struct br_boolopt_multi *bm);
 752void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 753
 754/* br_device.c */
 755void br_dev_setup(struct net_device *dev);
 756void br_dev_delete(struct net_device *dev, struct list_head *list);
 757netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 758#ifdef CONFIG_NET_POLL_CONTROLLER
 759static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 760				       struct sk_buff *skb)
 761{
 762	netpoll_send_skb(p->np, skb);
 763}
 764
 765int br_netpoll_enable(struct net_bridge_port *p);
 766void br_netpoll_disable(struct net_bridge_port *p);
 767#else
 768static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 769				       struct sk_buff *skb)
 770{
 771}
 772
 773static inline int br_netpoll_enable(struct net_bridge_port *p)
 774{
 775	return 0;
 776}
 777
 778static inline void br_netpoll_disable(struct net_bridge_port *p)
 779{
 780}
 781#endif
 782
 783/* br_fdb.c */
 784#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 785#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 786#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 787				     NTF_STICKY | NTF_OFFLOADED)
 788
 789int br_fdb_init(void);
 790void br_fdb_fini(void);
 791int br_fdb_hash_init(struct net_bridge *br);
 792void br_fdb_hash_fini(struct net_bridge *br);
 793void br_fdb_flush(struct net_bridge *br,
 794		  const struct net_bridge_fdb_flush_desc *desc);
 795void br_fdb_find_delete_local(struct net_bridge *br,
 796			      const struct net_bridge_port *p,
 797			      const unsigned char *addr, u16 vid);
 798void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 799void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 800void br_fdb_cleanup(struct work_struct *work);
 801void br_fdb_delete_by_port(struct net_bridge *br,
 802			   const struct net_bridge_port *p, u16 vid, int do_all);
 803struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 804					     const unsigned char *addr,
 805					     __u16 vid);
 806int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 807int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 808		   unsigned long off);
 809int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 810		     const unsigned char *addr, u16 vid);
 811void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 812		   const unsigned char *addr, u16 vid, unsigned long flags);
 813
 814int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 815		  struct net_device *dev, const unsigned char *addr, u16 vid,
 816		  struct netlink_ext_ack *extack);
 817int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
 818		       struct net_device *dev, u16 vid,
 819		       struct netlink_ext_ack *extack);
 820int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 821	       const unsigned char *addr, u16 vid, u16 nlh_flags,
 822	       struct netlink_ext_ack *extack);
 823int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 824		struct net_device *dev, struct net_device *fdev, int *idx);
 825int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 826	       const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 827	       struct netlink_ext_ack *extack);
 828int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 829void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 830int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 831			      const unsigned char *addr, u16 vid,
 832			      bool locked, bool swdev_notify);
 833int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 834			      const unsigned char *addr, u16 vid,
 835			      bool swdev_notify);
 836void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 837			  const unsigned char *addr, u16 vid, bool offloaded);
 838
 839/* br_forward.c */
 840enum br_pkt_type {
 841	BR_PKT_UNICAST,
 842	BR_PKT_MULTICAST,
 843	BR_PKT_BROADCAST
 844};
 845int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 846void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 847		bool local_rcv, bool local_orig);
 848int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 849void br_flood(struct net_bridge *br, struct sk_buff *skb,
 850	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
 851
 852/* return true if both source port and dest port are isolated */
 853static inline bool br_skb_isolated(const struct net_bridge_port *to,
 854				   const struct sk_buff *skb)
 855{
 856	return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 857	       (to->flags & BR_ISOLATED);
 858}
 859
 860/* br_if.c */
 861void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 862int br_add_bridge(struct net *net, const char *name);
 863int br_del_bridge(struct net *net, const char *name);
 864int br_add_if(struct net_bridge *br, struct net_device *dev,
 865	      struct netlink_ext_ack *extack);
 866int br_del_if(struct net_bridge *br, struct net_device *dev);
 867void br_mtu_auto_adjust(struct net_bridge *br);
 868netdev_features_t br_features_recompute(struct net_bridge *br,
 869					netdev_features_t features);
 870void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 871void br_manage_promisc(struct net_bridge *br);
 872int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 873
 874/* br_input.c */
 875int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 876rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 877
 878struct br_frame_type {
 879	__be16			type;
 880	int			(*frame_handler)(struct net_bridge_port *port,
 881						 struct sk_buff *skb);
 882	struct hlist_node	list;
 883};
 884
 885void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 886void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 887
 888static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 889{
 890	return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 891}
 892
 893static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 894{
 895	return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 896}
 897
 898static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 899{
 900	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 901}
 902
 903static inline struct net_bridge_port *
 904br_port_get_check_rtnl(const struct net_device *dev)
 905{
 906	return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 907}
 908
 909/* br_ioctl.c */
 910int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 911			  void __user *data, int cmd);
 912int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 913		  struct ifreq *ifr, void __user *uarg);
 914
 915/* br_multicast.c */
 916#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 917int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 918		     struct net_bridge_mcast_port **pmctx,
 919		     struct net_bridge_vlan *vlan,
 920		     struct sk_buff *skb, u16 vid);
 921struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
 922					struct sk_buff *skb, u16 vid);
 923int br_multicast_add_port(struct net_bridge_port *port);
 924void br_multicast_del_port(struct net_bridge_port *port);
 925void br_multicast_enable_port(struct net_bridge_port *port);
 926void br_multicast_disable_port(struct net_bridge_port *port);
 927void br_multicast_init(struct net_bridge *br);
 928void br_multicast_join_snoopers(struct net_bridge *br);
 929void br_multicast_leave_snoopers(struct net_bridge *br);
 930void br_multicast_open(struct net_bridge *br);
 931void br_multicast_stop(struct net_bridge *br);
 932void br_multicast_dev_del(struct net_bridge *br);
 933void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 934			struct net_bridge_mcast *brmctx,
 935			bool local_rcv, bool local_orig);
 936int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 937int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 938				 unsigned long val);
 939int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 940int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 941			struct netlink_ext_ack *extack);
 942int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 943int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
 944int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 945				  unsigned long val);
 946#if IS_ENABLED(CONFIG_IPV6)
 947int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 948				 unsigned long val);
 949#endif
 950struct net_bridge_mdb_entry *
 951br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 952struct net_bridge_mdb_entry *
 953br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 954struct net_bridge_port_group *
 955br_multicast_new_port_group(struct net_bridge_port *port,
 956			    const struct br_ip *group,
 957			    struct net_bridge_port_group __rcu *next,
 958			    unsigned char flags, const unsigned char *src,
 959			    u8 filter_mode, u8 rt_protocol);
 960int br_mdb_hash_init(struct net_bridge *br);
 961void br_mdb_hash_fini(struct net_bridge *br);
 962void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
 963		   struct net_bridge_port_group *pg, int type);
 964void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
 965		   int type);
 966void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
 967			 struct net_bridge_port_group *pg,
 968			 struct net_bridge_port_group __rcu **pp);
 969void br_multicast_count(struct net_bridge *br,
 970			const struct net_bridge_port *p,
 971			const struct sk_buff *skb, u8 type, u8 dir);
 972int br_multicast_init_stats(struct net_bridge *br);
 973void br_multicast_uninit_stats(struct net_bridge *br);
 974void br_multicast_get_stats(const struct net_bridge *br,
 975			    const struct net_bridge_port *p,
 976			    struct br_mcast_stats *dest);
 977void br_mdb_init(void);
 978void br_mdb_uninit(void);
 979void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
 980			    struct net_bridge_mdb_entry *mp, bool notify);
 981void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
 982void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
 983				     u8 filter_mode);
 984void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
 985				       struct net_bridge_port_group *sg);
 986struct net_bridge_group_src *
 987br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
 988struct net_bridge_group_src *
 989br_multicast_new_group_src(struct net_bridge_port_group *pg,
 990			   struct br_ip *src_ip);
 991void __br_multicast_del_group_src(struct net_bridge_group_src *src);
 992void br_multicast_del_group_src(struct net_bridge_group_src *src,
 993				bool fastleave);
 994void br_multicast_ctx_init(struct net_bridge *br,
 995			   struct net_bridge_vlan *vlan,
 996			   struct net_bridge_mcast *brmctx);
 997void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
 998void br_multicast_port_ctx_init(struct net_bridge_port *port,
 999				struct net_bridge_vlan *vlan,
1000				struct net_bridge_mcast_port *pmctx);
1001void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1002void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1003int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1004				      struct netlink_ext_ack *extack);
1005bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1006
1007int br_rports_fill_info(struct sk_buff *skb,
1008			const struct net_bridge_mcast *brmctx);
1009int br_multicast_dump_querier_state(struct sk_buff *skb,
1010				    const struct net_bridge_mcast *brmctx,
1011				    int nest_attr);
1012size_t br_multicast_querier_state_size(void);
1013size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1014void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1015				  unsigned long val);
1016void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1017					  unsigned long val);
1018
1019static inline bool br_group_is_l2(const struct br_ip *group)
1020{
1021	return group->proto == 0;
1022}
1023
1024#define mlock_dereference(X, br) \
1025	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1026
1027static inline struct hlist_node *
1028br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1029				  struct sk_buff *skb)
1030{
1031#if IS_ENABLED(CONFIG_IPV6)
1032	if (skb->protocol == htons(ETH_P_IPV6))
1033		return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1034#endif
1035	return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1036}
1037
1038static inline struct net_bridge_port *
1039br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1040{
1041	struct net_bridge_mcast_port *mctx;
1042
1043#if IS_ENABLED(CONFIG_IPV6)
1044	if (skb->protocol == htons(ETH_P_IPV6))
1045		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1046					ip6_rlist);
1047	else
1048#endif
1049		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1050					ip4_rlist);
1051
1052	if (mctx)
1053		return mctx->port;
1054	else
1055		return NULL;
1056}
1057
1058static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1059{
1060	return timer_pending(&brmctx->ip4_mc_router_timer);
1061}
1062
1063static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1064{
1065#if IS_ENABLED(CONFIG_IPV6)
1066	return timer_pending(&brmctx->ip6_mc_router_timer);
1067#else
1068	return false;
1069#endif
1070}
1071
1072static inline bool
1073br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1074{
1075	switch (brmctx->multicast_router) {
1076	case MDB_RTR_TYPE_PERM:
1077		return true;
1078	case MDB_RTR_TYPE_TEMP_QUERY:
1079		if (skb) {
1080			if (skb->protocol == htons(ETH_P_IP))
1081				return br_ip4_multicast_is_router(brmctx);
1082			else if (skb->protocol == htons(ETH_P_IPV6))
1083				return br_ip6_multicast_is_router(brmctx);
1084		} else {
1085			return br_ip4_multicast_is_router(brmctx) ||
1086			       br_ip6_multicast_is_router(brmctx);
1087		}
1088		fallthrough;
1089	default:
1090		return false;
1091	}
1092}
1093
1094static inline bool
1095__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1096			      struct bridge_mcast_other_query *querier,
1097			      const bool is_ipv6)
1098{
1099	bool own_querier_enabled;
1100
1101	if (brmctx->multicast_querier) {
1102		if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1103			own_querier_enabled = false;
1104		else
1105			own_querier_enabled = true;
1106	} else {
1107		own_querier_enabled = false;
1108	}
1109
1110	return time_is_before_jiffies(querier->delay_time) &&
1111	       (own_querier_enabled || timer_pending(&querier->timer));
1112}
1113
1114static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1115					       struct ethhdr *eth,
1116					       const struct net_bridge_mdb_entry *mdb)
1117{
1118	switch (eth->h_proto) {
1119	case (htons(ETH_P_IP)):
1120		return __br_multicast_querier_exists(brmctx,
1121			&brmctx->ip4_other_query, false);
1122#if IS_ENABLED(CONFIG_IPV6)
1123	case (htons(ETH_P_IPV6)):
1124		return __br_multicast_querier_exists(brmctx,
1125			&brmctx->ip6_other_query, true);
1126#endif
1127	default:
1128		return !!mdb && br_group_is_l2(&mdb->addr);
1129	}
1130}
1131
1132static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1133{
1134	switch (ip->proto) {
1135	case htons(ETH_P_IP):
1136		return ipv4_is_zeronet(ip->src.ip4);
1137#if IS_ENABLED(CONFIG_IPV6)
1138	case htons(ETH_P_IPV6):
1139		return ipv6_addr_any(&ip->src.ip6);
1140#endif
1141	default:
1142		return false;
1143	}
1144}
1145
1146static inline bool
1147br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1148				__be16 proto)
1149{
1150	switch (proto) {
1151	case htons(ETH_P_IP):
1152		return !!(brmctx->multicast_igmp_version == 3);
1153#if IS_ENABLED(CONFIG_IPV6)
1154	case htons(ETH_P_IPV6):
1155		return !!(brmctx->multicast_mld_version == 2);
1156#endif
1157	default:
1158		return false;
1159	}
1160}
1161
1162static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1163{
1164	return BR_INPUT_SKB_CB(skb)->igmp;
1165}
1166
1167static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1168{
1169	return brmctx->multicast_last_member_interval *
1170	       brmctx->multicast_last_member_count;
1171}
1172
1173static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1174{
1175	return brmctx->multicast_membership_interval;
1176}
1177
1178static inline bool
1179br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1180{
1181	return !!brmctx->vlan;
1182}
1183
1184static inline bool
1185br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1186{
1187	return !!pmctx->vlan;
 
1188}
1189
1190static inline struct net_bridge_mcast *
1191br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1192{
1193	if (!br_multicast_port_ctx_is_vlan(pmctx))
1194		return &pmctx->port->br->multicast_ctx;
1195	else
1196		return &pmctx->vlan->brvlan->br_mcast_ctx;
1197}
1198
1199static inline bool
1200br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1201{
1202	return br_multicast_ctx_is_vlan(brmctx) &&
1203	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1204		!(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1205}
1206
1207static inline bool
1208br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1209{
1210	return br_multicast_ctx_is_vlan(brmctx) &&
1211	       !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1212}
1213
1214static inline bool
1215br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1216{
1217	return br_multicast_port_ctx_is_vlan(pmctx) &&
1218	       !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1219}
1220
1221static inline bool
1222br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1223{
1224	return pmctx->port->state == BR_STATE_DISABLED ||
1225	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1226		(br_multicast_port_ctx_vlan_disabled(pmctx) ||
1227		 pmctx->vlan->state == BR_STATE_DISABLED));
1228}
1229
1230static inline bool
1231br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1232{
1233	return br_multicast_port_ctx_state_disabled(pmctx) ||
1234	       pmctx->port->state == BR_STATE_BLOCKING ||
1235	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1236		pmctx->vlan->state == BR_STATE_BLOCKING);
1237}
1238
1239static inline bool
1240br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1241{
1242#if IS_ENABLED(CONFIG_IPV6)
1243	return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1244	       !hlist_empty(&brmctx->ip6_mc_router_list);
1245#else
1246	return !hlist_empty(&brmctx->ip4_mc_router_list);
1247#endif
1248}
1249
1250static inline bool
1251br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1252			       const struct net_bridge_mcast *brmctx2)
1253{
1254	return brmctx1->multicast_igmp_version ==
1255	       brmctx2->multicast_igmp_version &&
1256	       brmctx1->multicast_last_member_count ==
1257	       brmctx2->multicast_last_member_count &&
1258	       brmctx1->multicast_startup_query_count ==
1259	       brmctx2->multicast_startup_query_count &&
1260	       brmctx1->multicast_last_member_interval ==
1261	       brmctx2->multicast_last_member_interval &&
1262	       brmctx1->multicast_membership_interval ==
1263	       brmctx2->multicast_membership_interval &&
1264	       brmctx1->multicast_querier_interval ==
1265	       brmctx2->multicast_querier_interval &&
1266	       brmctx1->multicast_query_interval ==
1267	       brmctx2->multicast_query_interval &&
1268	       brmctx1->multicast_query_response_interval ==
1269	       brmctx2->multicast_query_response_interval &&
1270	       brmctx1->multicast_startup_query_interval ==
1271	       brmctx2->multicast_startup_query_interval &&
1272	       brmctx1->multicast_querier == brmctx2->multicast_querier &&
1273	       brmctx1->multicast_router == brmctx2->multicast_router &&
1274	       !br_rports_have_mc_router(brmctx1) &&
1275	       !br_rports_have_mc_router(brmctx2) &&
1276#if IS_ENABLED(CONFIG_IPV6)
1277	       brmctx1->multicast_mld_version ==
1278	       brmctx2->multicast_mld_version &&
1279#endif
1280	       true;
1281}
1282
1283static inline bool
1284br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1285{
1286	bool vlan_snooping_enabled;
1287
1288	vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1289					     BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1290
1291	return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1292}
1293#else
1294static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1295				   struct net_bridge_mcast_port **pmctx,
1296				   struct net_bridge_vlan *vlan,
1297				   struct sk_buff *skb,
1298				   u16 vid)
1299{
1300	return 0;
1301}
1302
1303static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1304						      struct sk_buff *skb, u16 vid)
1305{
1306	return NULL;
1307}
1308
1309static inline int br_multicast_add_port(struct net_bridge_port *port)
1310{
1311	return 0;
1312}
1313
1314static inline void br_multicast_del_port(struct net_bridge_port *port)
1315{
1316}
1317
1318static inline void br_multicast_enable_port(struct net_bridge_port *port)
1319{
1320}
1321
1322static inline void br_multicast_disable_port(struct net_bridge_port *port)
1323{
1324}
1325
1326static inline void br_multicast_init(struct net_bridge *br)
1327{
1328}
1329
1330static inline void br_multicast_join_snoopers(struct net_bridge *br)
1331{
1332}
1333
1334static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1335{
1336}
1337
1338static inline void br_multicast_open(struct net_bridge *br)
1339{
1340}
1341
1342static inline void br_multicast_stop(struct net_bridge *br)
1343{
1344}
1345
1346static inline void br_multicast_dev_del(struct net_bridge *br)
1347{
1348}
1349
1350static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1351				      struct sk_buff *skb,
1352				      struct net_bridge_mcast *brmctx,
1353				      bool local_rcv, bool local_orig)
1354{
1355}
1356
1357static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1358					  struct sk_buff *skb)
1359{
1360	return false;
1361}
1362
1363static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1364					       struct ethhdr *eth,
1365					       const struct net_bridge_mdb_entry *mdb)
1366{
1367	return false;
1368}
1369
1370static inline void br_mdb_init(void)
1371{
1372}
1373
1374static inline void br_mdb_uninit(void)
1375{
1376}
1377
1378static inline int br_mdb_hash_init(struct net_bridge *br)
1379{
1380	return 0;
1381}
1382
1383static inline void br_mdb_hash_fini(struct net_bridge *br)
1384{
1385}
1386
1387static inline void br_multicast_count(struct net_bridge *br,
1388				      const struct net_bridge_port *p,
1389				      const struct sk_buff *skb,
1390				      u8 type, u8 dir)
1391{
1392}
1393
1394static inline int br_multicast_init_stats(struct net_bridge *br)
1395{
1396	return 0;
1397}
1398
1399static inline void br_multicast_uninit_stats(struct net_bridge *br)
1400{
1401}
1402
1403static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1404{
1405	return 0;
1406}
1407
1408static inline void br_multicast_ctx_init(struct net_bridge *br,
1409					 struct net_bridge_vlan *vlan,
1410					 struct net_bridge_mcast *brmctx)
1411{
1412}
1413
1414static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1415{
1416}
1417
1418static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1419					      struct net_bridge_vlan *vlan,
1420					      struct net_bridge_mcast_port *pmctx)
1421{
1422}
1423
1424static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1425{
1426}
1427
1428static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1429						bool on)
1430{
1431}
1432
1433static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1434						    bool on,
1435						    struct netlink_ext_ack *extack)
1436{
1437	return -EOPNOTSUPP;
1438}
1439
1440static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1441						   bool on)
1442{
1443	return false;
1444}
1445
1446static inline bool
1447br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1448			       const struct net_bridge_mcast *brmctx2)
1449{
1450	return true;
1451}
1452#endif
1453
1454/* br_vlan.c */
1455#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1456bool br_allowed_ingress(const struct net_bridge *br,
1457			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1458			u16 *vid, u8 *state,
1459			struct net_bridge_vlan **vlan);
1460bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1461		       const struct sk_buff *skb);
1462bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1463struct sk_buff *br_handle_vlan(struct net_bridge *br,
1464			       const struct net_bridge_port *port,
1465			       struct net_bridge_vlan_group *vg,
1466			       struct sk_buff *skb);
1467int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1468		bool *changed, struct netlink_ext_ack *extack);
1469int br_vlan_delete(struct net_bridge *br, u16 vid);
1470void br_vlan_flush(struct net_bridge *br);
1471struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1472void br_recalculate_fwd_mask(struct net_bridge *br);
1473int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1474			  struct netlink_ext_ack *extack);
1475int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1476			struct netlink_ext_ack *extack);
1477int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1478		      struct netlink_ext_ack *extack);
1479int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1480int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1481int br_vlan_init(struct net_bridge *br);
1482int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1483			     struct netlink_ext_ack *extack);
1484int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1485			       struct netlink_ext_ack *extack);
1486int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1487		 bool *changed, struct netlink_ext_ack *extack);
1488int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1489void nbp_vlan_flush(struct net_bridge_port *port);
1490int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1491int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1492void br_vlan_get_stats(const struct net_bridge_vlan *v,
1493		       struct pcpu_sw_netstats *stats);
1494void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1495int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1496			 void *ptr);
1497void br_vlan_rtnl_init(void);
1498void br_vlan_rtnl_uninit(void);
1499void br_vlan_notify(const struct net_bridge *br,
1500		    const struct net_bridge_port *p,
1501		    u16 vid, u16 vid_range,
1502		    int cmd);
1503bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1504			     const struct net_bridge_vlan *range_end);
1505
1506void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1507				    struct net_device_path_ctx *ctx,
1508				    struct net_device_path *path);
1509int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1510				   struct net_bridge_port *dst,
1511				   struct net_device_path *path);
1512
1513static inline struct net_bridge_vlan_group *br_vlan_group(
1514					const struct net_bridge *br)
1515{
1516	return rtnl_dereference(br->vlgrp);
1517}
1518
1519static inline struct net_bridge_vlan_group *nbp_vlan_group(
1520					const struct net_bridge_port *p)
1521{
1522	return rtnl_dereference(p->vlgrp);
1523}
1524
1525static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1526					const struct net_bridge *br)
1527{
1528	return rcu_dereference(br->vlgrp);
1529}
1530
1531static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1532					const struct net_bridge_port *p)
1533{
1534	return rcu_dereference(p->vlgrp);
1535}
1536
1537/* Since bridge now depends on 8021Q module, but the time bridge sees the
1538 * skb, the vlan tag will always be present if the frame was tagged.
1539 */
1540static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1541{
1542	int err = 0;
1543
1544	if (skb_vlan_tag_present(skb)) {
1545		*vid = skb_vlan_tag_get_id(skb);
1546	} else {
1547		*vid = 0;
1548		err = -EINVAL;
1549	}
1550
1551	return err;
1552}
1553
1554static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1555{
1556	if (!vg)
1557		return 0;
1558
1559	smp_rmb();
1560	return vg->pvid;
1561}
1562
1563static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1564{
1565	return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1566}
1567#else
1568static inline bool br_allowed_ingress(const struct net_bridge *br,
1569				      struct net_bridge_vlan_group *vg,
1570				      struct sk_buff *skb,
1571				      u16 *vid, u8 *state,
1572				      struct net_bridge_vlan **vlan)
1573
1574{
1575	*vlan = NULL;
1576	return true;
1577}
1578
1579static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1580				     const struct sk_buff *skb)
1581{
1582	return true;
1583}
1584
1585static inline bool br_should_learn(struct net_bridge_port *p,
1586				   struct sk_buff *skb, u16 *vid)
1587{
1588	return true;
1589}
1590
1591static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1592					     const struct net_bridge_port *port,
1593					     struct net_bridge_vlan_group *vg,
1594					     struct sk_buff *skb)
1595{
1596	return skb;
1597}
1598
1599static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1600			      bool *changed, struct netlink_ext_ack *extack)
1601{
1602	*changed = false;
1603	return -EOPNOTSUPP;
1604}
1605
1606static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1607{
1608	return -EOPNOTSUPP;
1609}
1610
1611static inline void br_vlan_flush(struct net_bridge *br)
1612{
1613}
1614
1615static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1616{
1617}
1618
1619static inline int br_vlan_init(struct net_bridge *br)
1620{
1621	return 0;
1622}
1623
1624static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1625			       bool *changed, struct netlink_ext_ack *extack)
1626{
1627	*changed = false;
1628	return -EOPNOTSUPP;
1629}
1630
1631static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1632{
1633	return -EOPNOTSUPP;
1634}
1635
1636static inline void nbp_vlan_flush(struct net_bridge_port *port)
1637{
1638}
1639
1640static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1641						   u16 vid)
1642{
1643	return NULL;
1644}
1645
1646static inline int nbp_vlan_init(struct net_bridge_port *port,
1647				struct netlink_ext_ack *extack)
1648{
1649	return 0;
1650}
1651
1652static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1653{
1654	return 0;
1655}
1656
1657static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1658{
1659	return 0;
1660}
1661
1662static inline int br_vlan_filter_toggle(struct net_bridge *br,
1663					unsigned long val,
1664					struct netlink_ext_ack *extack)
1665{
1666	return -EOPNOTSUPP;
1667}
1668
1669static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1670					 u32 filter_mask)
1671{
1672	return 0;
1673}
1674
1675static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1676						  struct net_device_path_ctx *ctx,
1677						  struct net_device_path *path)
1678{
1679}
1680
1681static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1682						 struct net_bridge_port *dst,
1683						 struct net_device_path *path)
1684{
1685	return 0;
1686}
1687
1688static inline struct net_bridge_vlan_group *br_vlan_group(
1689					const struct net_bridge *br)
1690{
1691	return NULL;
1692}
1693
1694static inline struct net_bridge_vlan_group *nbp_vlan_group(
1695					const struct net_bridge_port *p)
1696{
1697	return NULL;
1698}
1699
1700static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1701					const struct net_bridge *br)
1702{
1703	return NULL;
1704}
1705
1706static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1707					const struct net_bridge_port *p)
1708{
1709	return NULL;
1710}
1711
1712static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1713				     struct pcpu_sw_netstats *stats)
1714{
1715}
1716
1717static inline void br_vlan_port_event(struct net_bridge_port *p,
1718				      unsigned long event)
1719{
1720}
1721
1722static inline int br_vlan_bridge_event(struct net_device *dev,
1723				       unsigned long event, void *ptr)
1724{
1725	return 0;
1726}
1727
1728static inline void br_vlan_rtnl_init(void)
1729{
1730}
1731
1732static inline void br_vlan_rtnl_uninit(void)
1733{
1734}
1735
1736static inline void br_vlan_notify(const struct net_bridge *br,
1737				  const struct net_bridge_port *p,
1738				  u16 vid, u16 vid_range,
1739				  int cmd)
1740{
1741}
1742
1743static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1744					   const struct net_bridge_vlan *range_end)
1745{
1746	return true;
1747}
1748
1749static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1750{
1751	return 0;
1752}
1753
1754#endif
1755
1756/* br_vlan_options.c */
1757#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1758bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1759			   const struct net_bridge_vlan *range_end);
1760bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1761size_t br_vlan_opts_nl_size(void);
1762int br_vlan_process_options(const struct net_bridge *br,
1763			    const struct net_bridge_port *p,
1764			    struct net_bridge_vlan *range_start,
1765			    struct net_bridge_vlan *range_end,
1766			    struct nlattr **tb,
1767			    struct netlink_ext_ack *extack);
1768int br_vlan_rtm_process_global_options(struct net_device *dev,
1769				       const struct nlattr *attr,
1770				       int cmd,
1771				       struct netlink_ext_ack *extack);
1772bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1773					 const struct net_bridge_vlan *r_end);
1774bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1775			      const struct net_bridge_vlan *v_opts);
1776
1777/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1778static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1779{
1780	return READ_ONCE(v->state);
1781}
1782
1783static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1784{
1785	WRITE_ONCE(v->state, state);
1786}
1787
1788static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1789{
1790	return READ_ONCE(vg->pvid_state);
1791}
1792
1793static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1794					  u8 state)
1795{
1796	WRITE_ONCE(vg->pvid_state, state);
1797}
1798
1799/* learn_allow is true at ingress and false at egress */
1800static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1801{
1802	switch (state) {
1803	case BR_STATE_LEARNING:
1804		return learn_allow;
1805	case BR_STATE_FORWARDING:
1806		return true;
1807	default:
1808		return false;
1809	}
1810}
1811#endif
1812
1813/* br_mst.c */
1814#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1815DECLARE_STATIC_KEY_FALSE(br_mst_used);
1816static inline bool br_mst_is_enabled(struct net_bridge *br)
1817{
1818	return static_branch_unlikely(&br_mst_used) &&
1819		br_opt_get(br, BROPT_MST_ENABLED);
1820}
1821
1822int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1823		     struct netlink_ext_ack *extack);
1824int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1825void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1826int br_mst_set_enabled(struct net_bridge *br, bool on,
1827		       struct netlink_ext_ack *extack);
1828size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1829int br_mst_fill_info(struct sk_buff *skb,
1830		     const struct net_bridge_vlan_group *vg);
1831int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1832		   struct netlink_ext_ack *extack);
1833#else
1834static inline bool br_mst_is_enabled(struct net_bridge *br)
1835{
1836	return false;
1837}
1838
1839static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1840				   u8 state, struct netlink_ext_ack *extack)
1841{
1842	return -EOPNOTSUPP;
1843}
1844
1845static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1846				     struct netlink_ext_ack *extack)
1847{
1848	return -EOPNOTSUPP;
1849}
1850
1851static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1852{
1853	return 0;
1854}
1855
1856static inline int br_mst_fill_info(struct sk_buff *skb,
1857				   const struct net_bridge_vlan_group *vg)
1858{
1859	return -EOPNOTSUPP;
1860}
1861
1862static inline int br_mst_process(struct net_bridge_port *p,
1863				 const struct nlattr *mst_attr,
1864				 struct netlink_ext_ack *extack)
1865{
1866	return -EOPNOTSUPP;
1867}
1868#endif
1869
1870struct nf_br_ops {
1871	int (*br_dev_xmit_hook)(struct sk_buff *skb);
1872};
1873extern const struct nf_br_ops __rcu *nf_br_ops;
1874
1875/* br_netfilter.c */
1876#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1877int br_nf_core_init(void);
1878void br_nf_core_fini(void);
1879void br_netfilter_rtable_init(struct net_bridge *);
1880#else
1881static inline int br_nf_core_init(void) { return 0; }
1882static inline void br_nf_core_fini(void) {}
1883#define br_netfilter_rtable_init(x)
1884#endif
1885
1886/* br_stp.c */
1887void br_set_state(struct net_bridge_port *p, unsigned int state);
1888struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1889void br_init_port(struct net_bridge_port *p);
1890void br_become_designated_port(struct net_bridge_port *p);
1891
1892void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1893int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1894int br_set_hello_time(struct net_bridge *br, unsigned long x);
1895int br_set_max_age(struct net_bridge *br, unsigned long x);
1896int __set_ageing_time(struct net_device *dev, unsigned long t);
1897int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1898
1899
1900/* br_stp_if.c */
1901void br_stp_enable_bridge(struct net_bridge *br);
1902void br_stp_disable_bridge(struct net_bridge *br);
1903int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1904		       struct netlink_ext_ack *extack);
1905void br_stp_enable_port(struct net_bridge_port *p);
1906void br_stp_disable_port(struct net_bridge_port *p);
1907bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1908void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1909void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1910int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1911int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1912ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1913
1914/* br_stp_bpdu.c */
1915struct stp_proto;
1916void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1917		struct net_device *dev);
1918
1919/* br_stp_timer.c */
1920void br_stp_timer_init(struct net_bridge *br);
1921void br_stp_port_timer_init(struct net_bridge_port *p);
1922unsigned long br_timer_value(const struct timer_list *timer);
1923
1924/* br.c */
1925#if IS_ENABLED(CONFIG_ATM_LANE)
1926extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1927#endif
1928
1929/* br_mrp.c */
1930#if IS_ENABLED(CONFIG_BRIDGE_MRP)
1931int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1932		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1933bool br_mrp_enabled(struct net_bridge *br);
1934void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1935int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1936#else
1937static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1938			       struct nlattr *attr, int cmd,
1939			       struct netlink_ext_ack *extack)
1940{
1941	return -EOPNOTSUPP;
1942}
1943
1944static inline bool br_mrp_enabled(struct net_bridge *br)
1945{
1946	return false;
1947}
1948
1949static inline void br_mrp_port_del(struct net_bridge *br,
1950				   struct net_bridge_port *p)
1951{
1952}
1953
1954static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1955{
1956	return 0;
1957}
1958
1959#endif
1960
1961/* br_cfm.c */
1962#if IS_ENABLED(CONFIG_BRIDGE_CFM)
1963int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1964		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1965bool br_cfm_created(struct net_bridge *br);
1966void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1967int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1968int br_cfm_status_fill_info(struct sk_buff *skb,
1969			    struct net_bridge *br,
1970			    bool getlink);
1971int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1972int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1973#else
1974static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1975			       struct nlattr *attr, int cmd,
1976			       struct netlink_ext_ack *extack)
1977{
1978	return -EOPNOTSUPP;
1979}
1980
1981static inline bool br_cfm_created(struct net_bridge *br)
1982{
1983	return false;
1984}
1985
1986static inline void br_cfm_port_del(struct net_bridge *br,
1987				   struct net_bridge_port *p)
1988{
1989}
1990
1991static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1992{
1993	return -EOPNOTSUPP;
1994}
1995
1996static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1997					  struct net_bridge *br,
1998					  bool getlink)
1999{
2000	return -EOPNOTSUPP;
2001}
2002
2003static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2004{
2005	*count = 0;
2006	return -EOPNOTSUPP;
2007}
2008
2009static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2010{
2011	*count = 0;
2012	return -EOPNOTSUPP;
2013}
2014#endif
2015
2016/* br_netlink.c */
2017extern struct rtnl_link_ops br_link_ops;
2018int br_netlink_init(void);
2019void br_netlink_fini(void);
2020void br_ifinfo_notify(int event, const struct net_bridge *br,
2021		      const struct net_bridge_port *port);
2022void br_info_notify(int event, const struct net_bridge *br,
2023		    const struct net_bridge_port *port, u32 filter);
2024int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2025	       struct netlink_ext_ack *extack);
2026int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2027int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2028	       u32 filter_mask, int nlflags);
2029int br_process_vlan_info(struct net_bridge *br,
2030			 struct net_bridge_port *p, int cmd,
2031			 struct bridge_vlan_info *vinfo_curr,
2032			 struct bridge_vlan_info **vinfo_last,
2033			 bool *changed,
2034			 struct netlink_ext_ack *extack);
2035
2036#ifdef CONFIG_SYSFS
2037/* br_sysfs_if.c */
2038extern const struct sysfs_ops brport_sysfs_ops;
2039int br_sysfs_addif(struct net_bridge_port *p);
2040int br_sysfs_renameif(struct net_bridge_port *p);
2041
2042/* br_sysfs_br.c */
2043int br_sysfs_addbr(struct net_device *dev);
2044void br_sysfs_delbr(struct net_device *dev);
2045
2046#else
2047
2048static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2049static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2050static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2051static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2052#endif /* CONFIG_SYSFS */
2053
2054/* br_switchdev.c */
2055#ifdef CONFIG_NET_SWITCHDEV
2056int br_switchdev_port_offload(struct net_bridge_port *p,
2057			      struct net_device *dev, const void *ctx,
2058			      struct notifier_block *atomic_nb,
2059			      struct notifier_block *blocking_nb,
2060			      bool tx_fwd_offload,
2061			      struct netlink_ext_ack *extack);
2062
2063void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2064				 struct notifier_block *atomic_nb,
2065				 struct notifier_block *blocking_nb);
2066
2067bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2068
2069void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2070
2071void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2072					     struct sk_buff *skb);
2073void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2074					      struct sk_buff *skb);
2075void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2076			      struct sk_buff *skb);
2077bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2078				  const struct sk_buff *skb);
2079int br_switchdev_set_port_flag(struct net_bridge_port *p,
2080			       unsigned long flags,
2081			       unsigned long mask,
2082			       struct netlink_ext_ack *extack);
2083void br_switchdev_fdb_notify(struct net_bridge *br,
2084			     const struct net_bridge_fdb_entry *fdb, int type);
2085void br_switchdev_mdb_notify(struct net_device *dev,
2086			     struct net_bridge_mdb_entry *mp,
2087			     struct net_bridge_port_group *pg,
2088			     int type);
2089int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2090			       bool changed, struct netlink_ext_ack *extack);
2091int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2092void br_switchdev_init(struct net_bridge *br);
2093
2094static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2095{
2096	skb->offload_fwd_mark = 0;
2097}
2098#else
2099static inline int
2100br_switchdev_port_offload(struct net_bridge_port *p,
2101			  struct net_device *dev, const void *ctx,
2102			  struct notifier_block *atomic_nb,
2103			  struct notifier_block *blocking_nb,
2104			  bool tx_fwd_offload,
2105			  struct netlink_ext_ack *extack)
2106{
2107	return -EOPNOTSUPP;
2108}
2109
2110static inline void
2111br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2112			    struct notifier_block *atomic_nb,
2113			    struct notifier_block *blocking_nb)
2114{
2115}
2116
2117static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2118{
2119	return false;
2120}
2121
2122static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2123{
2124}
2125
2126static inline void
2127nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2128					struct sk_buff *skb)
2129{
2130}
2131
2132static inline void
2133nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2134					 struct sk_buff *skb)
2135{
 
2136}
2137
2138static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2139					    struct sk_buff *skb)
2140{
2141}
2142
2143static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2144						const struct sk_buff *skb)
2145{
2146	return true;
2147}
2148
2149static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2150					     unsigned long flags,
2151					     unsigned long mask,
2152					     struct netlink_ext_ack *extack)
2153{
2154	return 0;
2155}
2156
2157static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2158					     u16 flags, bool changed,
2159					     struct netlink_ext_ack *extack)
2160{
2161	return -EOPNOTSUPP;
2162}
2163
2164static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2165{
2166	return -EOPNOTSUPP;
2167}
2168
2169static inline void
2170br_switchdev_fdb_notify(struct net_bridge *br,
2171			const struct net_bridge_fdb_entry *fdb, int type)
2172{
2173}
2174
2175static inline void br_switchdev_mdb_notify(struct net_device *dev,
2176					   struct net_bridge_mdb_entry *mp,
2177					   struct net_bridge_port_group *pg,
2178					   int type)
2179{
2180}
2181
2182static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2183{
2184}
2185
2186static inline void br_switchdev_init(struct net_bridge *br)
2187{
2188}
2189
2190#endif /* CONFIG_NET_SWITCHDEV */
2191
2192/* br_arp_nd_proxy.c */
2193void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2194void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2195			      u16 vid, struct net_bridge_port *p);
2196void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2197		       u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2198struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2199#endif