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#ifdef CONFIG_BRIDGE_VLAN_FILTERING
 593	u8 vlan_filtered:1;
 594#endif
 595#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 596	u8 br_netfilter_broute:1;
 597#endif
 598
 599#ifdef CONFIG_NET_SWITCHDEV
 600	/* Set if TX data plane offloading is used towards at least one
 601	 * hardware domain.
 602	 */
 603	u8 tx_fwd_offload:1;
 604	/* The switchdev hardware domain from which this packet was received.
 605	 * If skb->offload_fwd_mark was set, then this packet was already
 606	 * forwarded by hardware to the other ports in the source hardware
 607	 * domain, otherwise it wasn't.
 608	 */
 609	int src_hwdom;
 610	/* Bit mask of hardware domains towards this packet has already been
 611	 * transmitted using the TX data plane offload.
 612	 */
 613	unsigned long fwd_hwdoms;
 614#endif
 615
 616	u32 backup_nhid;
 617};
 618
 619#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)
 620
 621#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 622# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
 623#else
 624# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
 625#endif
 626
 627#define br_printk(level, br, format, args...)	\
 628	printk(level "%s: " format, (br)->dev->name, ##args)
 629
 630#define br_err(__br, format, args...)			\
 631	br_printk(KERN_ERR, __br, format, ##args)
 632#define br_warn(__br, format, args...)			\
 633	br_printk(KERN_WARNING, __br, format, ##args)
 634#define br_notice(__br, format, args...)		\
 635	br_printk(KERN_NOTICE, __br, format, ##args)
 636#define br_info(__br, format, args...)			\
 637	br_printk(KERN_INFO, __br, format, ##args)
 638
 639#define br_debug(br, format, args...)			\
 640	pr_debug("%s: " format,  (br)->dev->name, ##args)
 641
 642/* called under bridge lock */
 643static inline int br_is_root_bridge(const struct net_bridge *br)
 644{
 645	return !memcmp(&br->bridge_id, &br->designated_root, 8);
 646}
 647
 648/* check if a VLAN entry is global */
 649static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
 650{
 651	return v->flags & BRIDGE_VLAN_INFO_MASTER;
 652}
 653
 654/* check if a VLAN entry is used by the bridge */
 655static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
 656{
 657	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
 658}
 659
 660/* check if we should use the vlan entry, returns false if it's only context */
 661static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
 662{
 663	if (br_vlan_is_master(v)) {
 664		if (br_vlan_is_brentry(v))
 665			return true;
 666		else
 667			return false;
 668	}
 669
 670	return true;
 671}
 672
 673static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
 674{
 675	return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
 676}
 677
 678static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
 679{
 680	bool ret = vid > 0 && vid < VLAN_VID_MASK;
 681
 682	if (!ret)
 683		NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
 684
 685	return ret;
 686}
 687
 688static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
 689				       const struct bridge_vlan_info *last,
 690				       struct netlink_ext_ack *extack)
 691{
 692	/* pvid flag is not allowed in ranges */
 693	if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
 694		NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
 695		return false;
 696	}
 697
 698	/* when cur is the range end, check if:
 699	 *  - it has range start flag
 700	 *  - range ids are invalid (end is equal to or before start)
 701	 */
 702	if (last) {
 703		if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
 704			NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
 705			return false;
 706		} else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
 707			NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
 708			return false;
 709		} else if (cur->vid <= last->vid) {
 710			NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
 711			return false;
 712		}
 713	}
 714
 715	/* check for required range flags */
 716	if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
 717			    BRIDGE_VLAN_INFO_RANGE_END))) {
 718		NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
 719		return false;
 720	}
 721
 722	return true;
 723}
 724
 725static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
 726{
 727	u8 mcast_router = MDB_RTR_TYPE_DISABLED;
 728
 729#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 730	if (!br_vlan_is_master(v))
 731		mcast_router = v->port_mcast_ctx.multicast_router;
 732	else
 733		mcast_router = v->br_mcast_ctx.multicast_router;
 734#endif
 735
 736	return mcast_router;
 737}
 738
 739static inline int br_afspec_cmd_to_rtm(int cmd)
 740{
 741	switch (cmd) {
 742	case RTM_SETLINK:
 743		return RTM_NEWVLAN;
 744	case RTM_DELLINK:
 745		return RTM_DELVLAN;
 746	}
 747
 748	return 0;
 749}
 750
 751static inline int br_opt_get(const struct net_bridge *br,
 752			     enum net_bridge_opts opt)
 753{
 754	return test_bit(opt, &br->options);
 755}
 756
 757int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 758		      struct netlink_ext_ack *extack);
 759int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
 760int br_boolopt_multi_toggle(struct net_bridge *br,
 761			    struct br_boolopt_multi *bm,
 762			    struct netlink_ext_ack *extack);
 763void br_boolopt_multi_get(const struct net_bridge *br,
 764			  struct br_boolopt_multi *bm);
 765void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
 766
 767#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
 768static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 769{
 770	struct tc_skb_ext *ext;
 771
 772	if (!tc_skb_ext_tc_enabled())
 773		return;
 774
 775	ext = skb_ext_find(skb, TC_SKB_EXT);
 776	if (ext) {
 777		ext->l2_miss = miss;
 778		return;
 779	}
 780	if (!miss)
 781		return;
 782	ext = tc_skb_ext_alloc(skb);
 783	if (!ext)
 784		return;
 785	ext->l2_miss = true;
 786}
 787#else
 788static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
 789{
 790}
 791#endif
 792
 793/* br_device.c */
 794void br_dev_setup(struct net_device *dev);
 795void br_dev_delete(struct net_device *dev, struct list_head *list);
 796netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
 797#ifdef CONFIG_NET_POLL_CONTROLLER
 798static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 799				       struct sk_buff *skb)
 800{
 801	netpoll_send_skb(p->np, skb);
 802}
 803
 804int br_netpoll_enable(struct net_bridge_port *p);
 805void br_netpoll_disable(struct net_bridge_port *p);
 806#else
 807static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
 808				       struct sk_buff *skb)
 809{
 810}
 811
 812static inline int br_netpoll_enable(struct net_bridge_port *p)
 813{
 814	return 0;
 815}
 816
 817static inline void br_netpoll_disable(struct net_bridge_port *p)
 818{
 819}
 820#endif
 821
 822/* br_fdb.c */
 823#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
 824#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
 825#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
 826				     NTF_STICKY | NTF_OFFLOADED)
 827
 828int br_fdb_init(void);
 829void br_fdb_fini(void);
 830int br_fdb_hash_init(struct net_bridge *br);
 831void br_fdb_hash_fini(struct net_bridge *br);
 832void br_fdb_flush(struct net_bridge *br,
 833		  const struct net_bridge_fdb_flush_desc *desc);
 834void br_fdb_find_delete_local(struct net_bridge *br,
 835			      const struct net_bridge_port *p,
 836			      const unsigned char *addr, u16 vid);
 837void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
 838void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
 839void br_fdb_cleanup(struct work_struct *work);
 840void br_fdb_delete_by_port(struct net_bridge *br,
 841			   const struct net_bridge_port *p, u16 vid, int do_all);
 842struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
 843					     const unsigned char *addr,
 844					     __u16 vid);
 845int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
 846int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
 847		   unsigned long off);
 848int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
 849		     const unsigned char *addr, u16 vid);
 850void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
 851		   const unsigned char *addr, u16 vid, unsigned long flags);
 852
 853int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 854		  struct net_device *dev, const unsigned char *addr, u16 vid,
 855		  struct netlink_ext_ack *extack);
 856int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
 857		       struct netlink_ext_ack *extack);
 858int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
 859	       const unsigned char *addr, u16 vid, u16 nlh_flags,
 860	       struct netlink_ext_ack *extack);
 861int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 862		struct net_device *dev, struct net_device *fdev, int *idx);
 863int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
 864	       const unsigned char *addr, u16 vid, u32 portid, u32 seq,
 865	       struct netlink_ext_ack *extack);
 866int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
 867void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
 868int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
 869			      const unsigned char *addr, u16 vid,
 870			      bool locked, bool swdev_notify);
 871int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
 872			      const unsigned char *addr, u16 vid,
 873			      bool swdev_notify);
 874void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
 875			  const unsigned char *addr, u16 vid, bool offloaded);
 876
 877/* br_forward.c */
 878enum br_pkt_type {
 879	BR_PKT_UNICAST,
 880	BR_PKT_MULTICAST,
 881	BR_PKT_BROADCAST
 882};
 883int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
 884void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 885		bool local_rcv, bool local_orig);
 886int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 887void br_flood(struct net_bridge *br, struct sk_buff *skb,
 888	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
 889	      u16 vid);
 890
 891/* return true if both source port and dest port are isolated */
 892static inline bool br_skb_isolated(const struct net_bridge_port *to,
 893				   const struct sk_buff *skb)
 894{
 895	return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
 896	       (to->flags & BR_ISOLATED);
 897}
 898
 899/* br_if.c */
 900void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
 901int br_add_bridge(struct net *net, const char *name);
 902int br_del_bridge(struct net *net, const char *name);
 903int br_add_if(struct net_bridge *br, struct net_device *dev,
 904	      struct netlink_ext_ack *extack);
 905int br_del_if(struct net_bridge *br, struct net_device *dev);
 906void br_mtu_auto_adjust(struct net_bridge *br);
 907netdev_features_t br_features_recompute(struct net_bridge *br,
 908					netdev_features_t features);
 909void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
 910void br_manage_promisc(struct net_bridge *br);
 911int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
 912
 913/* br_input.c */
 914int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 915rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
 916
 917struct br_frame_type {
 918	__be16			type;
 919	int			(*frame_handler)(struct net_bridge_port *port,
 920						 struct sk_buff *skb);
 921	struct hlist_node	list;
 922};
 923
 924void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
 925void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
 926
 927static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
 928{
 929	return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
 930}
 931
 932static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
 933{
 934	return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
 935}
 936
 937static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
 938{
 939	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
 940}
 941
 942static inline struct net_bridge_port *
 943br_port_get_check_rtnl(const struct net_device *dev)
 944{
 945	return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
 946}
 947
 948/* br_ioctl.c */
 949int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
 950			  void __user *data, int cmd);
 951int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
 952		  struct ifreq *ifr, void __user *uarg);
 953
 954/* br_multicast.c */
 955#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 956int br_multicast_rcv(struct net_bridge_mcast **brmctx,
 957		     struct net_bridge_mcast_port **pmctx,
 958		     struct net_bridge_vlan *vlan,
 959		     struct sk_buff *skb, u16 vid);
 960struct net_bridge_mdb_entry *
 961br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
 962		     u16 vid);
 963int br_multicast_add_port(struct net_bridge_port *port);
 964void br_multicast_del_port(struct net_bridge_port *port);
 965void br_multicast_enable_port(struct net_bridge_port *port);
 966void br_multicast_disable_port(struct net_bridge_port *port);
 967void br_multicast_init(struct net_bridge *br);
 968void br_multicast_join_snoopers(struct net_bridge *br);
 969void br_multicast_leave_snoopers(struct net_bridge *br);
 970void br_multicast_open(struct net_bridge *br);
 971void br_multicast_stop(struct net_bridge *br);
 972void br_multicast_dev_del(struct net_bridge *br);
 973void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
 974			struct net_bridge_mcast *brmctx,
 975			bool local_rcv, bool local_orig);
 976int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
 977int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
 978				 unsigned long val);
 979int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
 980int br_multicast_toggle(struct net_bridge *br, unsigned long val,
 981			struct netlink_ext_ack *extack);
 982int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
 983int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
 984				  unsigned long val);
 985#if IS_ENABLED(CONFIG_IPV6)
 986int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
 987				 unsigned long val);
 988#endif
 989struct net_bridge_mdb_entry *
 990br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
 991struct net_bridge_mdb_entry *
 992br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
 993struct net_bridge_port_group *
 994br_multicast_new_port_group(struct net_bridge_port *port,
 995			    const struct br_ip *group,
 996			    struct net_bridge_port_group __rcu *next,
 997			    unsigned char flags, const unsigned char *src,
 998			    u8 filter_mode, u8 rt_protocol,
 999			    struct netlink_ext_ack *extack);
1000void br_multicast_del_port_group(struct net_bridge_port_group *p);
1001int br_mdb_hash_init(struct net_bridge *br);
1002void br_mdb_hash_fini(struct net_bridge *br);
1003void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1004		   struct net_bridge_port_group *pg, int type);
1005void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1006		   int type);
1007void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1008			 struct net_bridge_port_group *pg,
1009			 struct net_bridge_port_group __rcu **pp);
1010void br_multicast_count(struct net_bridge *br,
1011			const struct net_bridge_port *p,
1012			const struct sk_buff *skb, u8 type, u8 dir);
1013int br_multicast_init_stats(struct net_bridge *br);
1014void br_multicast_uninit_stats(struct net_bridge *br);
1015void br_multicast_get_stats(const struct net_bridge *br,
1016			    const struct net_bridge_port *p,
1017			    struct br_mcast_stats *dest);
1018u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1019void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1020u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1021int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1022	       struct netlink_ext_ack *extack);
1023int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1024	       struct netlink_ext_ack *extack);
1025int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1026		    struct netlink_ext_ack *extack);
1027int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1028		struct netlink_callback *cb);
1029int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1030	       struct netlink_ext_ack *extack);
1031void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1032			    struct net_bridge_mdb_entry *mp, bool notify);
1033void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1034void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1035				     u8 filter_mode);
1036void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1037				       struct net_bridge_port_group *sg);
1038struct net_bridge_group_src *
1039br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1040struct net_bridge_group_src *
1041br_multicast_new_group_src(struct net_bridge_port_group *pg,
1042			   struct br_ip *src_ip);
1043void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1044void br_multicast_del_group_src(struct net_bridge_group_src *src,
1045				bool fastleave);
1046void br_multicast_ctx_init(struct net_bridge *br,
1047			   struct net_bridge_vlan *vlan,
1048			   struct net_bridge_mcast *brmctx);
1049void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1050void br_multicast_port_ctx_init(struct net_bridge_port *port,
1051				struct net_bridge_vlan *vlan,
1052				struct net_bridge_mcast_port *pmctx);
1053void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1054void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1055int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1056				      struct netlink_ext_ack *extack);
1057bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1058
1059int br_rports_fill_info(struct sk_buff *skb,
1060			const struct net_bridge_mcast *brmctx);
1061int br_multicast_dump_querier_state(struct sk_buff *skb,
1062				    const struct net_bridge_mcast *brmctx,
1063				    int nest_attr);
1064size_t br_multicast_querier_state_size(void);
1065size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1066void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1067				  unsigned long val);
1068void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1069					  unsigned long val);
1070
1071static inline bool br_group_is_l2(const struct br_ip *group)
1072{
1073	return group->proto == 0;
1074}
1075
1076#define mlock_dereference(X, br) \
1077	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1078
1079static inline struct hlist_node *
1080br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1081				  struct sk_buff *skb)
1082{
1083#if IS_ENABLED(CONFIG_IPV6)
1084	if (skb->protocol == htons(ETH_P_IPV6))
1085		return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1086#endif
1087	return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1088}
1089
1090static inline struct net_bridge_port *
1091br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1092{
1093	struct net_bridge_mcast_port *mctx;
1094
1095#if IS_ENABLED(CONFIG_IPV6)
1096	if (skb->protocol == htons(ETH_P_IPV6))
1097		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1098					ip6_rlist);
1099	else
1100#endif
1101		mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1102					ip4_rlist);
1103
1104	if (mctx)
1105		return mctx->port;
1106	else
1107		return NULL;
1108}
1109
1110static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1111{
1112	return timer_pending(&brmctx->ip4_mc_router_timer);
1113}
1114
1115static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1116{
1117#if IS_ENABLED(CONFIG_IPV6)
1118	return timer_pending(&brmctx->ip6_mc_router_timer);
1119#else
1120	return false;
1121#endif
1122}
1123
1124static inline bool
1125br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1126{
1127	switch (brmctx->multicast_router) {
1128	case MDB_RTR_TYPE_PERM:
1129		return true;
1130	case MDB_RTR_TYPE_TEMP_QUERY:
1131		if (skb) {
1132			if (skb->protocol == htons(ETH_P_IP))
1133				return br_ip4_multicast_is_router(brmctx);
1134			else if (skb->protocol == htons(ETH_P_IPV6))
1135				return br_ip6_multicast_is_router(brmctx);
1136		} else {
1137			return br_ip4_multicast_is_router(brmctx) ||
1138			       br_ip6_multicast_is_router(brmctx);
1139		}
1140		fallthrough;
1141	default:
1142		return false;
1143	}
1144}
1145
1146static inline bool
1147__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1148			      struct bridge_mcast_other_query *querier,
1149			      const bool is_ipv6)
1150{
1151	bool own_querier_enabled;
1152
1153	if (brmctx->multicast_querier) {
1154		if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1155			own_querier_enabled = false;
1156		else
1157			own_querier_enabled = true;
1158	} else {
1159		own_querier_enabled = false;
1160	}
1161
1162	return !timer_pending(&querier->delay_timer) &&
1163	       (own_querier_enabled || timer_pending(&querier->timer));
1164}
1165
1166static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1167					       struct ethhdr *eth,
1168					       const struct net_bridge_mdb_entry *mdb)
1169{
1170	switch (eth->h_proto) {
1171	case (htons(ETH_P_IP)):
1172		return __br_multicast_querier_exists(brmctx,
1173			&brmctx->ip4_other_query, false);
1174#if IS_ENABLED(CONFIG_IPV6)
1175	case (htons(ETH_P_IPV6)):
1176		return __br_multicast_querier_exists(brmctx,
1177			&brmctx->ip6_other_query, true);
1178#endif
1179	default:
1180		return !!mdb && br_group_is_l2(&mdb->addr);
1181	}
1182}
1183
1184static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1185{
1186	switch (ip->proto) {
1187	case htons(ETH_P_IP):
1188		return ipv4_is_zeronet(ip->src.ip4);
1189#if IS_ENABLED(CONFIG_IPV6)
1190	case htons(ETH_P_IPV6):
1191		return ipv6_addr_any(&ip->src.ip6);
1192#endif
1193	default:
1194		return false;
1195	}
1196}
1197
1198static inline bool
1199br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1200				__be16 proto)
1201{
1202	switch (proto) {
1203	case htons(ETH_P_IP):
1204		return !!(brmctx->multicast_igmp_version == 3);
1205#if IS_ENABLED(CONFIG_IPV6)
1206	case htons(ETH_P_IPV6):
1207		return !!(brmctx->multicast_mld_version == 2);
1208#endif
1209	default:
1210		return false;
1211	}
1212}
1213
1214static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1215{
1216	return BR_INPUT_SKB_CB(skb)->igmp;
1217}
1218
1219static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1220{
1221	return brmctx->multicast_last_member_interval *
1222	       brmctx->multicast_last_member_count;
1223}
1224
1225static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1226{
1227	return brmctx->multicast_membership_interval;
1228}
1229
1230static inline bool
1231br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1232{
1233	return !!brmctx->vlan;
1234}
1235
1236static inline bool
1237br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1238{
1239	return !!pmctx->vlan;
1240}
1241
1242static inline struct net_bridge_mcast *
1243br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1244{
1245	if (!br_multicast_port_ctx_is_vlan(pmctx))
1246		return &pmctx->port->br->multicast_ctx;
1247	else
1248		return &pmctx->vlan->brvlan->br_mcast_ctx;
1249}
1250
1251static inline bool
1252br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1253{
1254	return br_multicast_ctx_is_vlan(brmctx) &&
1255	       (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1256		!(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1257}
1258
1259static inline bool
1260br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1261{
1262	return br_multicast_ctx_is_vlan(brmctx) &&
1263	       !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1264}
1265
1266static inline bool
1267br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1268{
1269	return br_multicast_port_ctx_is_vlan(pmctx) &&
1270	       !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1271}
1272
1273static inline bool
1274br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1275{
1276	return pmctx->port->state == BR_STATE_DISABLED ||
1277	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1278		(br_multicast_port_ctx_vlan_disabled(pmctx) ||
1279		 pmctx->vlan->state == BR_STATE_DISABLED));
1280}
1281
1282static inline bool
1283br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1284{
1285	return br_multicast_port_ctx_state_disabled(pmctx) ||
1286	       pmctx->port->state == BR_STATE_BLOCKING ||
1287	       (br_multicast_port_ctx_is_vlan(pmctx) &&
1288		pmctx->vlan->state == BR_STATE_BLOCKING);
1289}
1290
1291static inline bool
1292br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1293{
1294#if IS_ENABLED(CONFIG_IPV6)
1295	return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1296	       !hlist_empty(&brmctx->ip6_mc_router_list);
1297#else
1298	return !hlist_empty(&brmctx->ip4_mc_router_list);
1299#endif
1300}
1301
1302static inline bool
1303br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1304			       const struct net_bridge_mcast *brmctx2)
1305{
1306	return brmctx1->multicast_igmp_version ==
1307	       brmctx2->multicast_igmp_version &&
1308	       brmctx1->multicast_last_member_count ==
1309	       brmctx2->multicast_last_member_count &&
1310	       brmctx1->multicast_startup_query_count ==
1311	       brmctx2->multicast_startup_query_count &&
1312	       brmctx1->multicast_last_member_interval ==
1313	       brmctx2->multicast_last_member_interval &&
1314	       brmctx1->multicast_membership_interval ==
1315	       brmctx2->multicast_membership_interval &&
1316	       brmctx1->multicast_querier_interval ==
1317	       brmctx2->multicast_querier_interval &&
1318	       brmctx1->multicast_query_interval ==
1319	       brmctx2->multicast_query_interval &&
1320	       brmctx1->multicast_query_response_interval ==
1321	       brmctx2->multicast_query_response_interval &&
1322	       brmctx1->multicast_startup_query_interval ==
1323	       brmctx2->multicast_startup_query_interval &&
1324	       brmctx1->multicast_querier == brmctx2->multicast_querier &&
1325	       brmctx1->multicast_router == brmctx2->multicast_router &&
1326	       !br_rports_have_mc_router(brmctx1) &&
1327	       !br_rports_have_mc_router(brmctx2) &&
1328#if IS_ENABLED(CONFIG_IPV6)
1329	       brmctx1->multicast_mld_version ==
1330	       brmctx2->multicast_mld_version &&
1331#endif
1332	       true;
1333}
1334
1335static inline bool
1336br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1337{
1338	bool vlan_snooping_enabled;
1339
1340	vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1341					     BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1342
1343	return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1344}
1345#else
1346static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1347				   struct net_bridge_mcast_port **pmctx,
1348				   struct net_bridge_vlan *vlan,
1349				   struct sk_buff *skb,
1350				   u16 vid)
1351{
1352	return 0;
1353}
1354
1355static inline struct net_bridge_mdb_entry *
1356br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1357		     u16 vid)
1358{
1359	return NULL;
1360}
1361
1362static inline int br_multicast_add_port(struct net_bridge_port *port)
1363{
1364	return 0;
1365}
1366
1367static inline void br_multicast_del_port(struct net_bridge_port *port)
1368{
1369}
1370
1371static inline void br_multicast_enable_port(struct net_bridge_port *port)
1372{
1373}
1374
1375static inline void br_multicast_disable_port(struct net_bridge_port *port)
1376{
1377}
1378
1379static inline void br_multicast_init(struct net_bridge *br)
1380{
1381}
1382
1383static inline void br_multicast_join_snoopers(struct net_bridge *br)
1384{
1385}
1386
1387static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1388{
1389}
1390
1391static inline void br_multicast_open(struct net_bridge *br)
1392{
1393}
1394
1395static inline void br_multicast_stop(struct net_bridge *br)
1396{
1397}
1398
1399static inline void br_multicast_dev_del(struct net_bridge *br)
1400{
1401}
1402
1403static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1404				      struct sk_buff *skb,
1405				      struct net_bridge_mcast *brmctx,
1406				      bool local_rcv, bool local_orig)
1407{
1408}
1409
1410static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1411					  struct sk_buff *skb)
1412{
1413	return false;
1414}
1415
1416static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1417					       struct ethhdr *eth,
1418					       const struct net_bridge_mdb_entry *mdb)
1419{
1420	return false;
1421}
1422
1423static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1424			     u16 nlmsg_flags, struct netlink_ext_ack *extack)
1425{
1426	return -EOPNOTSUPP;
1427}
1428
1429static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1430			     struct netlink_ext_ack *extack)
1431{
1432	return -EOPNOTSUPP;
1433}
1434
1435static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1436				  struct netlink_ext_ack *extack)
1437{
1438	return -EOPNOTSUPP;
1439}
1440
1441static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1442			      struct netlink_callback *cb)
1443{
1444	return 0;
1445}
1446
1447static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1448			     u32 portid, u32 seq,
1449			     struct netlink_ext_ack *extack)
1450{
1451	return -EOPNOTSUPP;
1452}
1453
1454static inline int br_mdb_hash_init(struct net_bridge *br)
1455{
1456	return 0;
1457}
1458
1459static inline void br_mdb_hash_fini(struct net_bridge *br)
1460{
1461}
1462
1463static inline void br_multicast_count(struct net_bridge *br,
1464				      const struct net_bridge_port *p,
1465				      const struct sk_buff *skb,
1466				      u8 type, u8 dir)
1467{
1468}
1469
1470static inline int br_multicast_init_stats(struct net_bridge *br)
1471{
1472	return 0;
1473}
1474
1475static inline void br_multicast_uninit_stats(struct net_bridge *br)
1476{
1477}
1478
1479static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1480{
1481	return 0;
1482}
1483
1484static inline void br_multicast_ctx_init(struct net_bridge *br,
1485					 struct net_bridge_vlan *vlan,
1486					 struct net_bridge_mcast *brmctx)
1487{
1488}
1489
1490static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1491{
1492}
1493
1494static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1495					      struct net_bridge_vlan *vlan,
1496					      struct net_bridge_mcast_port *pmctx)
1497{
1498}
1499
1500static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1501{
1502}
1503
1504static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1505						bool on)
1506{
1507}
1508
1509static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1510						    bool on,
1511						    struct netlink_ext_ack *extack)
1512{
1513	return -EOPNOTSUPP;
1514}
1515
1516static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1517						   bool on)
1518{
1519	return false;
1520}
1521
1522static inline bool
1523br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1524			       const struct net_bridge_mcast *brmctx2)
1525{
1526	return true;
1527}
1528#endif
1529
1530/* br_vlan.c */
1531#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1532bool br_allowed_ingress(const struct net_bridge *br,
1533			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1534			u16 *vid, u8 *state,
1535			struct net_bridge_vlan **vlan);
1536bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1537		       const struct sk_buff *skb);
1538bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1539struct sk_buff *br_handle_vlan(struct net_bridge *br,
1540			       const struct net_bridge_port *port,
1541			       struct net_bridge_vlan_group *vg,
1542			       struct sk_buff *skb);
1543int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1544		bool *changed, struct netlink_ext_ack *extack);
1545int br_vlan_delete(struct net_bridge *br, u16 vid);
1546void br_vlan_flush(struct net_bridge *br);
1547struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1548void br_recalculate_fwd_mask(struct net_bridge *br);
1549int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1550			  struct netlink_ext_ack *extack);
1551int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1552			struct netlink_ext_ack *extack);
1553int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1554		      struct netlink_ext_ack *extack);
1555int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1556int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1557int br_vlan_init(struct net_bridge *br);
1558int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1559			     struct netlink_ext_ack *extack);
1560int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1561			       struct netlink_ext_ack *extack);
1562int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1563		 bool *changed, struct netlink_ext_ack *extack);
1564int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1565void nbp_vlan_flush(struct net_bridge_port *port);
1566int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1567int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1568void br_vlan_get_stats(const struct net_bridge_vlan *v,
1569		       struct pcpu_sw_netstats *stats);
1570void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1571int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1572			 void *ptr);
1573void br_vlan_rtnl_init(void);
1574void br_vlan_rtnl_uninit(void);
1575void br_vlan_notify(const struct net_bridge *br,
1576		    const struct net_bridge_port *p,
1577		    u16 vid, u16 vid_range,
1578		    int cmd);
1579bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1580			     const struct net_bridge_vlan *range_end);
1581
1582void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1583				    struct net_device_path_ctx *ctx,
1584				    struct net_device_path *path);
1585int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1586				   struct net_bridge_port *dst,
1587				   struct net_device_path *path);
1588
1589static inline struct net_bridge_vlan_group *br_vlan_group(
1590					const struct net_bridge *br)
1591{
1592	return rtnl_dereference(br->vlgrp);
1593}
1594
1595static inline struct net_bridge_vlan_group *nbp_vlan_group(
1596					const struct net_bridge_port *p)
1597{
1598	return rtnl_dereference(p->vlgrp);
1599}
1600
1601static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1602					const struct net_bridge *br)
1603{
1604	return rcu_dereference(br->vlgrp);
1605}
1606
1607static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1608					const struct net_bridge_port *p)
1609{
1610	return rcu_dereference(p->vlgrp);
1611}
1612
1613/* Since bridge now depends on 8021Q module, but the time bridge sees the
1614 * skb, the vlan tag will always be present if the frame was tagged.
1615 */
1616static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1617{
1618	int err = 0;
1619
1620	if (skb_vlan_tag_present(skb)) {
1621		*vid = skb_vlan_tag_get_id(skb);
1622	} else {
1623		*vid = 0;
1624		err = -EINVAL;
1625	}
1626
1627	return err;
1628}
1629
1630static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1631{
1632	if (!vg)
1633		return 0;
1634
1635	smp_rmb();
1636	return vg->pvid;
1637}
1638
1639static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1640{
1641	return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1642}
1643#else
1644static inline bool br_allowed_ingress(const struct net_bridge *br,
1645				      struct net_bridge_vlan_group *vg,
1646				      struct sk_buff *skb,
1647				      u16 *vid, u8 *state,
1648				      struct net_bridge_vlan **vlan)
1649
1650{
1651	*vlan = NULL;
1652	return true;
1653}
1654
1655static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1656				     const struct sk_buff *skb)
1657{
1658	return true;
1659}
1660
1661static inline bool br_should_learn(struct net_bridge_port *p,
1662				   struct sk_buff *skb, u16 *vid)
1663{
1664	return true;
1665}
1666
1667static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1668					     const struct net_bridge_port *port,
1669					     struct net_bridge_vlan_group *vg,
1670					     struct sk_buff *skb)
1671{
1672	return skb;
1673}
1674
1675static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1676			      bool *changed, struct netlink_ext_ack *extack)
1677{
1678	*changed = false;
1679	return -EOPNOTSUPP;
1680}
1681
1682static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1683{
1684	return -EOPNOTSUPP;
1685}
1686
1687static inline void br_vlan_flush(struct net_bridge *br)
1688{
1689}
1690
1691static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1692{
1693}
1694
1695static inline int br_vlan_init(struct net_bridge *br)
1696{
1697	return 0;
1698}
1699
1700static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1701			       bool *changed, struct netlink_ext_ack *extack)
1702{
1703	*changed = false;
1704	return -EOPNOTSUPP;
1705}
1706
1707static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1708{
1709	return -EOPNOTSUPP;
1710}
1711
1712static inline void nbp_vlan_flush(struct net_bridge_port *port)
1713{
1714}
1715
1716static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1717						   u16 vid)
1718{
1719	return NULL;
1720}
1721
1722static inline int nbp_vlan_init(struct net_bridge_port *port,
1723				struct netlink_ext_ack *extack)
1724{
1725	return 0;
1726}
1727
1728static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1729{
1730	return 0;
1731}
1732
1733static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1734{
1735	return 0;
1736}
1737
1738static inline int br_vlan_filter_toggle(struct net_bridge *br,
1739					unsigned long val,
1740					struct netlink_ext_ack *extack)
1741{
1742	return -EOPNOTSUPP;
1743}
1744
1745static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1746					 u32 filter_mask)
1747{
1748	return 0;
1749}
1750
1751static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1752						  struct net_device_path_ctx *ctx,
1753						  struct net_device_path *path)
1754{
1755}
1756
1757static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1758						 struct net_bridge_port *dst,
1759						 struct net_device_path *path)
1760{
1761	return 0;
1762}
1763
1764static inline struct net_bridge_vlan_group *br_vlan_group(
1765					const struct net_bridge *br)
1766{
1767	return NULL;
1768}
1769
1770static inline struct net_bridge_vlan_group *nbp_vlan_group(
1771					const struct net_bridge_port *p)
1772{
1773	return NULL;
1774}
1775
1776static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1777					const struct net_bridge *br)
1778{
1779	return NULL;
1780}
1781
1782static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1783					const struct net_bridge_port *p)
1784{
1785	return NULL;
1786}
1787
1788static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1789				     struct pcpu_sw_netstats *stats)
1790{
1791}
1792
1793static inline void br_vlan_port_event(struct net_bridge_port *p,
1794				      unsigned long event)
1795{
1796}
1797
1798static inline int br_vlan_bridge_event(struct net_device *dev,
1799				       unsigned long event, void *ptr)
1800{
1801	return 0;
1802}
1803
1804static inline void br_vlan_rtnl_init(void)
1805{
1806}
1807
1808static inline void br_vlan_rtnl_uninit(void)
1809{
1810}
1811
1812static inline void br_vlan_notify(const struct net_bridge *br,
1813				  const struct net_bridge_port *p,
1814				  u16 vid, u16 vid_range,
1815				  int cmd)
1816{
1817}
1818
1819static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1820					   const struct net_bridge_vlan *range_end)
1821{
1822	return true;
1823}
1824
1825static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1826{
1827	return 0;
1828}
1829
1830#endif
1831
1832/* br_vlan_options.c */
1833#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1834bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1835			   const struct net_bridge_vlan *range_end);
1836bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1837		       const struct net_bridge_port *p);
1838size_t br_vlan_opts_nl_size(void);
1839int br_vlan_process_options(const struct net_bridge *br,
1840			    const struct net_bridge_port *p,
1841			    struct net_bridge_vlan *range_start,
1842			    struct net_bridge_vlan *range_end,
1843			    struct nlattr **tb,
1844			    struct netlink_ext_ack *extack);
1845int br_vlan_rtm_process_global_options(struct net_device *dev,
1846				       const struct nlattr *attr,
1847				       int cmd,
1848				       struct netlink_ext_ack *extack);
1849bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1850					 const struct net_bridge_vlan *r_end);
1851bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1852			      const struct net_bridge_vlan *v_opts);
1853
1854/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1855static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1856{
1857	return READ_ONCE(v->state);
1858}
1859
1860static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1861{
1862	WRITE_ONCE(v->state, state);
1863}
1864
1865static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1866{
1867	return READ_ONCE(vg->pvid_state);
1868}
1869
1870static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1871					  u8 state)
1872{
1873	WRITE_ONCE(vg->pvid_state, state);
1874}
1875
1876/* learn_allow is true at ingress and false at egress */
1877static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1878{
1879	switch (state) {
1880	case BR_STATE_LEARNING:
1881		return learn_allow;
1882	case BR_STATE_FORWARDING:
1883		return true;
1884	default:
1885		return false;
1886	}
1887}
1888#endif
1889
1890/* br_mst.c */
1891#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1892DECLARE_STATIC_KEY_FALSE(br_mst_used);
1893static inline bool br_mst_is_enabled(struct net_bridge *br)
1894{
1895	return static_branch_unlikely(&br_mst_used) &&
1896		br_opt_get(br, BROPT_MST_ENABLED);
1897}
1898
1899int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1900		     struct netlink_ext_ack *extack);
1901int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1902void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1903int br_mst_set_enabled(struct net_bridge *br, bool on,
1904		       struct netlink_ext_ack *extack);
1905size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1906int br_mst_fill_info(struct sk_buff *skb,
1907		     const struct net_bridge_vlan_group *vg);
1908int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1909		   struct netlink_ext_ack *extack);
1910#else
1911static inline bool br_mst_is_enabled(struct net_bridge *br)
1912{
1913	return false;
1914}
1915
1916static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1917				   u8 state, struct netlink_ext_ack *extack)
1918{
1919	return -EOPNOTSUPP;
1920}
1921
1922static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1923				     struct netlink_ext_ack *extack)
1924{
1925	return -EOPNOTSUPP;
1926}
1927
1928static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1929{
1930	return 0;
1931}
1932
1933static inline int br_mst_fill_info(struct sk_buff *skb,
1934				   const struct net_bridge_vlan_group *vg)
1935{
1936	return -EOPNOTSUPP;
1937}
1938
1939static inline int br_mst_process(struct net_bridge_port *p,
1940				 const struct nlattr *mst_attr,
1941				 struct netlink_ext_ack *extack)
1942{
1943	return -EOPNOTSUPP;
1944}
1945#endif
1946
1947struct nf_br_ops {
1948	int (*br_dev_xmit_hook)(struct sk_buff *skb);
1949};
1950extern const struct nf_br_ops __rcu *nf_br_ops;
1951
1952/* br_netfilter.c */
1953#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1954int br_nf_core_init(void);
1955void br_nf_core_fini(void);
1956void br_netfilter_rtable_init(struct net_bridge *);
1957#else
1958static inline int br_nf_core_init(void) { return 0; }
1959static inline void br_nf_core_fini(void) {}
1960#define br_netfilter_rtable_init(x)
1961#endif
1962
1963/* br_stp.c */
1964void br_set_state(struct net_bridge_port *p, unsigned int state);
1965struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1966void br_init_port(struct net_bridge_port *p);
1967void br_become_designated_port(struct net_bridge_port *p);
1968
1969void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1970int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1971int br_set_hello_time(struct net_bridge *br, unsigned long x);
1972int br_set_max_age(struct net_bridge *br, unsigned long x);
1973int __set_ageing_time(struct net_device *dev, unsigned long t);
1974int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1975
1976
1977/* br_stp_if.c */
1978void br_stp_enable_bridge(struct net_bridge *br);
1979void br_stp_disable_bridge(struct net_bridge *br);
1980int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1981		       struct netlink_ext_ack *extack);
1982void br_stp_enable_port(struct net_bridge_port *p);
1983void br_stp_disable_port(struct net_bridge_port *p);
1984bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1985void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1986void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1987int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1988int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1989ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1990
1991/* br_stp_bpdu.c */
1992struct stp_proto;
1993void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1994		struct net_device *dev);
1995
1996/* br_stp_timer.c */
1997void br_stp_timer_init(struct net_bridge *br);
1998void br_stp_port_timer_init(struct net_bridge_port *p);
1999unsigned long br_timer_value(const struct timer_list *timer);
2000
2001/* br.c */
2002#if IS_ENABLED(CONFIG_ATM_LANE)
2003extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
2004#endif
2005
2006/* br_mrp.c */
2007#if IS_ENABLED(CONFIG_BRIDGE_MRP)
2008int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2009		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2010bool br_mrp_enabled(struct net_bridge *br);
2011void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2012int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2013#else
2014static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2015			       struct nlattr *attr, int cmd,
2016			       struct netlink_ext_ack *extack)
2017{
2018	return -EOPNOTSUPP;
2019}
2020
2021static inline bool br_mrp_enabled(struct net_bridge *br)
2022{
2023	return false;
2024}
2025
2026static inline void br_mrp_port_del(struct net_bridge *br,
2027				   struct net_bridge_port *p)
2028{
2029}
2030
2031static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2032{
2033	return 0;
2034}
2035
2036#endif
2037
2038/* br_cfm.c */
2039#if IS_ENABLED(CONFIG_BRIDGE_CFM)
2040int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2041		 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2042bool br_cfm_created(struct net_bridge *br);
2043void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2044int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2045int br_cfm_status_fill_info(struct sk_buff *skb,
2046			    struct net_bridge *br,
2047			    bool getlink);
2048int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2049int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2050#else
2051static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2052			       struct nlattr *attr, int cmd,
2053			       struct netlink_ext_ack *extack)
2054{
2055	return -EOPNOTSUPP;
2056}
2057
2058static inline bool br_cfm_created(struct net_bridge *br)
2059{
2060	return false;
2061}
2062
2063static inline void br_cfm_port_del(struct net_bridge *br,
2064				   struct net_bridge_port *p)
2065{
2066}
2067
2068static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2069{
2070	return -EOPNOTSUPP;
2071}
2072
2073static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2074					  struct net_bridge *br,
2075					  bool getlink)
2076{
2077	return -EOPNOTSUPP;
2078}
2079
2080static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2081{
2082	*count = 0;
2083	return -EOPNOTSUPP;
2084}
2085
2086static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2087{
2088	*count = 0;
2089	return -EOPNOTSUPP;
2090}
2091#endif
2092
2093/* br_netlink.c */
2094extern struct rtnl_link_ops br_link_ops;
2095int br_netlink_init(void);
2096void br_netlink_fini(void);
2097void br_ifinfo_notify(int event, const struct net_bridge *br,
2098		      const struct net_bridge_port *port);
2099void br_info_notify(int event, const struct net_bridge *br,
2100		    const struct net_bridge_port *port, u32 filter);
2101int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2102	       struct netlink_ext_ack *extack);
2103int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2104int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2105	       u32 filter_mask, int nlflags);
2106int br_process_vlan_info(struct net_bridge *br,
2107			 struct net_bridge_port *p, int cmd,
2108			 struct bridge_vlan_info *vinfo_curr,
2109			 struct bridge_vlan_info **vinfo_last,
2110			 bool *changed,
2111			 struct netlink_ext_ack *extack);
2112
2113#ifdef CONFIG_SYSFS
2114/* br_sysfs_if.c */
2115extern const struct sysfs_ops brport_sysfs_ops;
2116int br_sysfs_addif(struct net_bridge_port *p);
2117int br_sysfs_renameif(struct net_bridge_port *p);
2118
2119/* br_sysfs_br.c */
2120int br_sysfs_addbr(struct net_device *dev);
2121void br_sysfs_delbr(struct net_device *dev);
2122
2123#else
2124
2125static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2126static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2127static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2128static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2129#endif /* CONFIG_SYSFS */
2130
2131/* br_switchdev.c */
2132#ifdef CONFIG_NET_SWITCHDEV
2133int br_switchdev_port_offload(struct net_bridge_port *p,
2134			      struct net_device *dev, const void *ctx,
2135			      struct notifier_block *atomic_nb,
2136			      struct notifier_block *blocking_nb,
2137			      bool tx_fwd_offload,
2138			      struct netlink_ext_ack *extack);
2139
2140void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2141				 struct notifier_block *atomic_nb,
2142				 struct notifier_block *blocking_nb);
2143
2144int br_switchdev_port_replay(struct net_bridge_port *p,
2145			     struct net_device *dev, const void *ctx,
2146			     struct notifier_block *atomic_nb,
2147			     struct notifier_block *blocking_nb,
2148			     struct netlink_ext_ack *extack);
2149
2150bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2151
2152void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2153
2154void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2155					     struct sk_buff *skb);
2156void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2157					      struct sk_buff *skb);
2158void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2159			      struct sk_buff *skb);
2160bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2161				  const struct sk_buff *skb);
2162int br_switchdev_set_port_flag(struct net_bridge_port *p,
2163			       unsigned long flags,
2164			       unsigned long mask,
2165			       struct netlink_ext_ack *extack);
2166void br_switchdev_fdb_notify(struct net_bridge *br,
2167			     const struct net_bridge_fdb_entry *fdb, int type);
2168void br_switchdev_mdb_notify(struct net_device *dev,
2169			     struct net_bridge_mdb_entry *mp,
2170			     struct net_bridge_port_group *pg,
2171			     int type);
2172int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2173			       bool changed, struct netlink_ext_ack *extack);
2174int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2175void br_switchdev_init(struct net_bridge *br);
2176
2177static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2178{
2179	skb->offload_fwd_mark = 0;
2180}
2181#else
2182static inline int
2183br_switchdev_port_offload(struct net_bridge_port *p,
2184			  struct net_device *dev, const void *ctx,
2185			  struct notifier_block *atomic_nb,
2186			  struct notifier_block *blocking_nb,
2187			  bool tx_fwd_offload,
2188			  struct netlink_ext_ack *extack)
2189{
2190	return -EOPNOTSUPP;
2191}
2192
2193static inline void
2194br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2195			    struct notifier_block *atomic_nb,
2196			    struct notifier_block *blocking_nb)
2197{
2198}
2199
2200static inline int
2201br_switchdev_port_replay(struct net_bridge_port *p,
2202			 struct net_device *dev, const void *ctx,
2203			 struct notifier_block *atomic_nb,
2204			 struct notifier_block *blocking_nb,
2205			 struct netlink_ext_ack *extack)
2206{
2207	return -EOPNOTSUPP;
2208}
2209
2210static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2211{
2212	return false;
2213}
2214
2215static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2216{
2217}
2218
2219static inline void
2220nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2221					struct sk_buff *skb)
2222{
2223}
2224
2225static inline void
2226nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2227					 struct sk_buff *skb)
2228{
 
2229}
2230
2231static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2232					    struct sk_buff *skb)
2233{
2234}
2235
2236static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2237						const struct sk_buff *skb)
2238{
2239	return true;
2240}
2241
2242static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2243					     unsigned long flags,
2244					     unsigned long mask,
2245					     struct netlink_ext_ack *extack)
2246{
2247	return 0;
2248}
2249
2250static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2251					     u16 flags, bool changed,
2252					     struct netlink_ext_ack *extack)
2253{
2254	return -EOPNOTSUPP;
2255}
2256
2257static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2258{
2259	return -EOPNOTSUPP;
2260}
2261
2262static inline void
2263br_switchdev_fdb_notify(struct net_bridge *br,
2264			const struct net_bridge_fdb_entry *fdb, int type)
2265{
2266}
2267
2268static inline void br_switchdev_mdb_notify(struct net_device *dev,
2269					   struct net_bridge_mdb_entry *mp,
2270					   struct net_bridge_port_group *pg,
2271					   int type)
2272{
2273}
2274
2275static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2276{
2277}
2278
2279static inline void br_switchdev_init(struct net_bridge *br)
2280{
2281}
2282
2283#endif /* CONFIG_NET_SWITCHDEV */
2284
2285/* br_arp_nd_proxy.c */
2286void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2287void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2288			      u16 vid, struct net_bridge_port *p);
2289void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2290		       u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2291struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2292bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2293#endif