[mirror_ubuntu-bionic-kernel.git] / net / bridge / br_private.h

/*
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#ifndef _BR_PRIVATE_H
#define _BR_PRIVATE_H

#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include <linux/u64_stats_sync.h>
#include <net/route.h>

#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)

#define BR_HOLD_TIME (1*HZ)

#define BR_PORT_BITS	10
#define BR_MAX_PORTS	(1<<BR_PORT_BITS)

#define BR_VERSION	"2.3"

/* Path to usermode spanning tree program */
#define BR_STP_PROG	"/sbin/bridge-stp"

typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;

struct bridge_id
{
	unsigned char	prio[2];
	unsigned char	addr[6];
};

struct mac_addr
{
	unsigned char	addr[6];
};

struct br_ip
{
	union {
		__be32	ip4;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
		struct in6_addr ip6;
#endif
	} u;
	__be16		proto;
};

struct net_bridge_fdb_entry
{
	struct hlist_node		hlist;
	struct net_bridge_port		*dst;

	struct rcu_head			rcu;
	unsigned long			ageing_timer;
	mac_addr			addr;
	unsigned char			is_local;
	unsigned char			is_static;
};

struct net_bridge_port_group {
	struct net_bridge_port		*port;
	struct net_bridge_port_group __rcu *next;
	struct hlist_node		mglist;
	struct rcu_head			rcu;
	struct timer_list		timer;
	struct timer_list		query_timer;
	struct br_ip			addr;
	u32				queries_sent;
};

struct net_bridge_mdb_entry
{
	struct hlist_node		hlist[2];
	struct hlist_node		mglist;
	struct net_bridge		*br;
	struct net_bridge_port_group __rcu *ports;
	struct rcu_head			rcu;
	struct timer_list		timer;
	struct timer_list		query_timer;
	struct br_ip			addr;
	u32				queries_sent;
};

struct net_bridge_mdb_htable
{
	struct hlist_head		*mhash;
	struct rcu_head			rcu;
	struct net_bridge_mdb_htable	*old;
	u32				size;
	u32				max;
	u32				secret;
	u32				ver;
};

struct net_bridge_port
{
	struct net_bridge		*br;
	struct net_device		*dev;
	struct list_head		list;

	/* STP */
	u8				priority;
	u8				state;
	u16				port_no;
	unsigned char			topology_change_ack;
	unsigned char			config_pending;
	port_id				port_id;
	port_id				designated_port;
	bridge_id			designated_root;
	bridge_id			designated_bridge;
	u32				path_cost;
	u32				designated_cost;

	struct timer_list		forward_delay_timer;
	struct timer_list		hold_timer;
	struct timer_list		message_age_timer;
	struct kobject			kobj;
	struct rcu_head			rcu;

	unsigned long 			flags;
#define BR_HAIRPIN_MODE		0x00000001

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	u32				multicast_startup_queries_sent;
	unsigned char			multicast_router;
	struct timer_list		multicast_router_timer;
	struct timer_list		multicast_query_timer;
	struct hlist_head		mglist;
	struct hlist_node		rlist;
#endif

#ifdef CONFIG_SYSFS
	char				sysfs_name[IFNAMSIZ];
#endif

#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll			*np;
#endif
};

#define br_port_get_rcu(dev) \
	((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
#define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)

struct br_cpu_netstats {
	u64			rx_packets;
	u64			rx_bytes;
	u64			tx_packets;
	u64			tx_bytes;
	struct u64_stats_sync	syncp;
};

struct net_bridge
{
	spinlock_t			lock;
	struct list_head		port_list;
	struct net_device		*dev;

	struct br_cpu_netstats __percpu *stats;
	spinlock_t			hash_lock;
	struct hlist_head		hash[BR_HASH_SIZE];
	unsigned long			feature_mask;
#ifdef CONFIG_BRIDGE_NETFILTER
	struct rtable 			fake_rtable;
	bool				nf_call_iptables;
	bool				nf_call_ip6tables;
	bool				nf_call_arptables;
#endif
	unsigned long			flags;
#define BR_SET_MAC_ADDR		0x00000001

	/* STP */
	bridge_id			designated_root;
	bridge_id			bridge_id;
	u32				root_path_cost;
	unsigned long			max_age;
	unsigned long			hello_time;
	unsigned long			forward_delay;
	unsigned long			bridge_max_age;
	unsigned long			ageing_time;
	unsigned long			bridge_hello_time;
	unsigned long			bridge_forward_delay;

	u8				group_addr[ETH_ALEN];
	u16				root_port;

	enum {
		BR_NO_STP, 		/* no spanning tree */
		BR_KERNEL_STP,		/* old STP in kernel */
		BR_USER_STP,		/* new RSTP in userspace */
	} stp_enabled;

	unsigned char			topology_change;
	unsigned char			topology_change_detected;

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	unsigned char			multicast_router;

	u8				multicast_disabled:1;

	u32				hash_elasticity;
	u32				hash_max;

	u32				multicast_last_member_count;
	u32				multicast_startup_queries_sent;
	u32				multicast_startup_query_count;

	unsigned long			multicast_last_member_interval;
	unsigned long			multicast_membership_interval;
	unsigned long			multicast_querier_interval;
	unsigned long			multicast_query_interval;
	unsigned long			multicast_query_response_interval;
	unsigned long			multicast_startup_query_interval;

	spinlock_t			multicast_lock;
	struct net_bridge_mdb_htable __rcu *mdb;
	struct hlist_head		router_list;
	struct hlist_head		mglist;

	struct timer_list		multicast_router_timer;
	struct timer_list		multicast_querier_timer;
	struct timer_list		multicast_query_timer;
#endif

	struct timer_list		hello_timer;
	struct timer_list		tcn_timer;
	struct timer_list		topology_change_timer;
	struct timer_list		gc_timer;
	struct kobject			*ifobj;
};

struct br_input_skb_cb {
	struct net_device *brdev;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	int igmp;
	int mrouters_only;
#endif
};

#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
#else
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
#endif

#define br_printk(level, br, format, args...)	\
	printk(level "%s: " format, (br)->dev->name, ##args)

#define br_err(__br, format, args...)			\
	br_printk(KERN_ERR, __br, format, ##args)
#define br_warn(__br, format, args...)			\
	br_printk(KERN_WARNING, __br, format, ##args)
#define br_notice(__br, format, args...)		\
	br_printk(KERN_NOTICE, __br, format, ##args)
#define br_info(__br, format, args...)			\
	br_printk(KERN_INFO, __br, format, ##args)

#define br_debug(br, format, args...)			\
	pr_debug("%s: " format,  (br)->dev->name, ##args)

extern struct notifier_block br_device_notifier;
extern const u8 br_group_address[ETH_ALEN];

/* called under bridge lock */
static inline int br_is_root_bridge(const struct net_bridge *br)
{
	return !memcmp(&br->bridge_id, &br->designated_root, 8);
}

/* br_device.c */
extern void br_dev_setup(struct net_device *dev);
extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
			       struct net_device *dev);
#ifdef CONFIG_NET_POLL_CONTROLLER
static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
{
	return br->dev->npinfo;
}

static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
				       struct sk_buff *skb)
{
	struct netpoll *np = p->np;

	if (np)
		netpoll_send_skb(np, skb);
}

extern int br_netpoll_enable(struct net_bridge_port *p);
extern void br_netpoll_disable(struct net_bridge_port *p);
#else
static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
{
	return NULL;
}

static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
				       struct sk_buff *skb)
{
}

static inline int br_netpoll_enable(struct net_bridge_port *p)
{
	return 0;
}

static inline void br_netpoll_disable(struct net_bridge_port *p)
{
}
#endif

/* br_fdb.c */
extern int br_fdb_init(void);
extern void br_fdb_fini(void);
extern void br_fdb_flush(struct net_bridge *br);
extern void br_fdb_changeaddr(struct net_bridge_port *p,
			      const unsigned char *newaddr);
extern void br_fdb_cleanup(unsigned long arg);
extern void br_fdb_delete_by_port(struct net_bridge *br,
				  const struct net_bridge_port *p, int do_all);
extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
						 const unsigned char *addr);
extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
			  unsigned long count, unsigned long off);
extern int br_fdb_insert(struct net_bridge *br,
			 struct net_bridge_port *source,
			 const unsigned char *addr);
extern void br_fdb_update(struct net_bridge *br,
			  struct net_bridge_port *source,
			  const unsigned char *addr);

/* br_forward.c */
extern void br_deliver(const struct net_bridge_port *to,
		struct sk_buff *skb);
extern int br_dev_queue_push_xmit(struct sk_buff *skb);
extern void br_forward(const struct net_bridge_port *to,
		struct sk_buff *skb, struct sk_buff *skb0);
extern int br_forward_finish(struct sk_buff *skb);
extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
			     struct sk_buff *skb2);

/* br_if.c */
extern void br_port_carrier_check(struct net_bridge_port *p);
extern int br_add_bridge(struct net *net, const char *name);
extern int br_del_bridge(struct net *net, const char *name);
extern void br_net_exit(struct net *net);
extern int br_add_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_del_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_min_mtu(const struct net_bridge *br);
extern void br_features_recompute(struct net_bridge *br);

/* br_input.c */
extern int br_handle_frame_finish(struct sk_buff *skb);
extern struct sk_buff *br_handle_frame(struct sk_buff *skb);

/* br_ioctl.c */
extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);

/* br_multicast.c */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
extern int br_multicast_rcv(struct net_bridge *br,
			    struct net_bridge_port *port,
			    struct sk_buff *skb);
extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
					       struct sk_buff *skb);
extern void br_multicast_add_port(struct net_bridge_port *port);
extern void br_multicast_del_port(struct net_bridge_port *port);
extern void br_multicast_enable_port(struct net_bridge_port *port);
extern void br_multicast_disable_port(struct net_bridge_port *port);
extern void br_multicast_init(struct net_bridge *br);
extern void br_multicast_open(struct net_bridge *br);
extern void br_multicast_stop(struct net_bridge *br);
extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
				 struct sk_buff *skb);
extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
				 struct sk_buff *skb, struct sk_buff *skb2);
extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
extern int br_multicast_set_port_router(struct net_bridge_port *p,
					unsigned long val);
extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);

static inline bool br_multicast_is_router(struct net_bridge *br)
{
	return br->multicast_router == 2 ||
	       (br->multicast_router == 1 &&
		timer_pending(&br->multicast_router_timer));
}
#else
static inline int br_multicast_rcv(struct net_bridge *br,
				   struct net_bridge_port *port,
				   struct sk_buff *skb)
{
	return 0;
}

static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
						      struct sk_buff *skb)
{
	return NULL;
}

static inline void br_multicast_add_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_del_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_enable_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_disable_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_init(struct net_bridge *br)
{
}

static inline void br_multicast_open(struct net_bridge *br)
{
}

static inline void br_multicast_stop(struct net_bridge *br)
{
}

static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
					struct sk_buff *skb)
{
}

static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
					struct sk_buff *skb,
					struct sk_buff *skb2)
{
}
static inline bool br_multicast_is_router(struct net_bridge *br)
{
	return 0;
}
#endif

/* br_netfilter.c */
#ifdef CONFIG_BRIDGE_NETFILTER
extern int br_netfilter_init(void);
extern void br_netfilter_fini(void);
extern void br_netfilter_rtable_init(struct net_bridge *);
#else
#define br_netfilter_init()	(0)
#define br_netfilter_fini()	do { } while(0)
#define br_netfilter_rtable_init(x)
#endif

/* br_stp.c */
extern void br_log_state(const struct net_bridge_port *p);
extern struct net_bridge_port *br_get_port(struct net_bridge *br,
					   u16 port_no);
extern void br_init_port(struct net_bridge_port *p);
extern void br_become_designated_port(struct net_bridge_port *p);

/* br_stp_if.c */
extern void br_stp_enable_bridge(struct net_bridge *br);
extern void br_stp_disable_bridge(struct net_bridge *br);
extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
extern void br_stp_enable_port(struct net_bridge_port *p);
extern void br_stp_disable_port(struct net_bridge_port *p);
extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
extern void br_stp_set_bridge_priority(struct net_bridge *br,
				       u16 newprio);
extern void br_stp_set_port_priority(struct net_bridge_port *p,
				     u8 newprio);
extern void br_stp_set_path_cost(struct net_bridge_port *p,
				 u32 path_cost);
extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);

/* br_stp_bpdu.c */
struct stp_proto;
extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
		       struct net_device *dev);

/* br_stp_timer.c */
extern void br_stp_timer_init(struct net_bridge *br);
extern void br_stp_port_timer_init(struct net_bridge_port *p);
extern unsigned long br_timer_value(const struct timer_list *timer);

/* br.c */
#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
#endif

/* br_netlink.c */
extern int br_netlink_init(void);
extern void br_netlink_fini(void);
extern void br_ifinfo_notify(int event, struct net_bridge_port *port);

#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
extern const struct sysfs_ops brport_sysfs_ops;
extern int br_sysfs_addif(struct net_bridge_port *p);
extern int br_sysfs_renameif(struct net_bridge_port *p);

/* br_sysfs_br.c */
extern int br_sysfs_addbr(struct net_device *dev);
extern void br_sysfs_delbr(struct net_device *dev);

#else

#define br_sysfs_addif(p)	(0)
#define br_sysfs_renameif(p)	(0)
#define br_sysfs_addbr(dev)	(0)
#define br_sysfs_delbr(dev)	do { } while(0)
#endif /* CONFIG_SYSFS */

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Linux ethernet bridge
	3	*
	4	* Authors:
	5	* Lennert Buytenhek <buytenh@gnu.org>
	6	*
1da177e4 LT	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*/
	12
	13	#ifndef _BR_PRIVATE_H
	14	#define _BR_PRIVATE_H
	15
	16	#include <linux/netdevice.h>
1da177e4	17	#include <linux/if_bridge.h>
91d2c34a	18	#include <linux/netpoll.h>
406818ff	19	#include <linux/u64_stats_sync.h>
4adf0af6	20	#include <net/route.h>
1da177e4 LT	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
9cde0708 SH	30	#define BR_VERSION "2.3"
	31
	32	/* Path to usermode spanning tree program */
	33	#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e	34
1da177e4 LT	35	typedef struct bridge_id bridge_id;
	36	typedef struct mac_addr mac_addr;
	37	typedef __u16 port_id;
	38
	39	struct bridge_id
	40	{
	41	unsigned char prio[2];
	42	unsigned char addr[6];
	43	};
	44
	45	struct mac_addr
	46	{
	47	unsigned char addr[6];
	48	};
	49
8ef2a9a5 YH	50	struct br_ip
	51	{
	52	union {
	53	__be32 ip4;
08b202b6 YH	54	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	55	struct in6_addr ip6;
	56	#endif
8ef2a9a5 YH	57	} u;
	58	__be16 proto;
	59	};
	60
1da177e4 LT	61	struct net_bridge_fdb_entry
	62	{
	63	struct hlist_node hlist;
	64	struct net_bridge_port *dst;
	65
	66	struct rcu_head rcu;
1da177e4 LT	67	unsigned long ageing_timer;
	68	mac_addr addr;
	69	unsigned char is_local;
	70	unsigned char is_static;
	71	};
	72
eb1d1641 HX	73	struct net_bridge_port_group {
eb1d1641 HX	74	struct net_bridge_port *port;
e8051688	75	struct net_bridge_port_group __rcu *next;
eb1d1641 HX	76	struct hlist_node mglist;
	77	struct rcu_head rcu;
	78	struct timer_list timer;
	79	struct timer_list query_timer;
8ef2a9a5	80	struct br_ip addr;
eb1d1641 HX	81	u32 queries_sent;
	82	};
	83
	84	struct net_bridge_mdb_entry
	85	{
	86	struct hlist_node hlist[2];
	87	struct hlist_node mglist;
	88	struct net_bridge *br;
e8051688	89	struct net_bridge_port_group __rcu *ports;
eb1d1641 HX	90	struct rcu_head rcu;
	91	struct timer_list timer;
	92	struct timer_list query_timer;
8ef2a9a5	93	struct br_ip addr;
eb1d1641 HX	94	u32 queries_sent;
	95	};
	96
	97	struct net_bridge_mdb_htable
	98	{
	99	struct hlist_head *mhash;
	100	struct rcu_head rcu;
	101	struct net_bridge_mdb_htable *old;
	102	u32 size;
	103	u32 max;
	104	u32 secret;
	105	u32 ver;
	106	};
	107
1da177e4 LT	108	struct net_bridge_port
	109	{
	110	struct net_bridge *br;
	111	struct net_device *dev;
	112	struct list_head list;
	113
	114	/* STP */
	115	u8 priority;
	116	u8 state;
	117	u16 port_no;
	118	unsigned char topology_change_ack;
	119	unsigned char config_pending;
	120	port_id port_id;
	121	port_id designated_port;
	122	bridge_id designated_root;
	123	bridge_id designated_bridge;
	124	u32 path_cost;
	125	u32 designated_cost;
	126
	127	struct timer_list forward_delay_timer;
	128	struct timer_list hold_timer;
	129	struct timer_list message_age_timer;
	130	struct kobject kobj;
	131	struct rcu_head rcu;
3982d3d2 FA	132
	133	unsigned long flags;
	134	#define BR_HAIRPIN_MODE 0x00000001
eb1d1641 HX	135
	136	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	137	u32 multicast_startup_queries_sent;
	138	unsigned char multicast_router;
	139	struct timer_list multicast_router_timer;
	140	struct timer_list multicast_query_timer;
	141	struct hlist_head mglist;
	142	struct hlist_node rlist;
	143	#endif
e0f43752 SA	144
	145	#ifdef CONFIG_SYSFS
	146	char sysfs_name[IFNAMSIZ];
	147	#endif
91d2c34a HX	148
	149	#ifdef CONFIG_NET_POLL_CONTROLLER
	150	struct netpoll *np;
	151	#endif
1da177e4 LT	152	};
1da177e4 LT	153
f350a0a8 JP	154	#define br_port_get_rcu(dev) \
	155	((struct net_bridge_port *) rcu_dereference(dev->rx_handler_data))
	156	#define br_port_get(dev) ((struct net_bridge_port *) dev->rx_handler_data)
	157	#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
	158
0eae88f3	159	struct br_cpu_netstats {
406818ff ED	160	u64 rx_packets;
	161	u64 rx_bytes;
	162	u64 tx_packets;
	163	u64 tx_bytes;
	164	struct u64_stats_sync syncp;
0eae88f3 ED	165	};
0eae88f3 ED	166
1da177e4 LT	167	struct net_bridge
	168	{
	169	spinlock_t lock;
	170	struct list_head port_list;
	171	struct net_device *dev;
14bb4789	172
0eae88f3	173	struct br_cpu_netstats __percpu *stats;
1da177e4 LT	174	spinlock_t hash_lock;
1da177e4 LT	175	struct hlist_head hash[BR_HASH_SIZE];
edb5e46f	176	unsigned long feature_mask;
4adf0af6 SW	177	#ifdef CONFIG_BRIDGE_NETFILTER
4adf0af6 SW	178	struct rtable fake_rtable;
4df53d8b PM	179	bool nf_call_iptables;
	180	bool nf_call_ip6tables;
	181	bool nf_call_arptables;
4adf0af6	182	#endif
92c0574f SH	183	unsigned long flags;
92c0574f SH	184	#define BR_SET_MAC_ADDR 0x00000001
1da177e4 LT	185
	186	/* STP */
	187	bridge_id designated_root;
	188	bridge_id bridge_id;
	189	u32 root_path_cost;
	190	unsigned long max_age;
	191	unsigned long hello_time;
	192	unsigned long forward_delay;
	193	unsigned long bridge_max_age;
	194	unsigned long ageing_time;
	195	unsigned long bridge_hello_time;
	196	unsigned long bridge_forward_delay;
	197
fda93d92	198	u8 group_addr[ETH_ALEN];
1da177e4	199	u16 root_port;
9cde0708 SH	200
	201	enum {
	202	BR_NO_STP, /* no spanning tree */
	203	BR_KERNEL_STP, /* old STP in kernel */
	204	BR_USER_STP, /* new RSTP in userspace */
	205	} stp_enabled;
	206
1da177e4 LT	207	unsigned char topology_change;
	208	unsigned char topology_change_detected;
	209
eb1d1641 HX	210	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	211	unsigned char multicast_router;
	212
	213	u8 multicast_disabled:1;
	214
	215	u32 hash_elasticity;
	216	u32 hash_max;
	217
	218	u32 multicast_last_member_count;
	219	u32 multicast_startup_queries_sent;
	220	u32 multicast_startup_query_count;
	221
	222	unsigned long multicast_last_member_interval;
	223	unsigned long multicast_membership_interval;
	224	unsigned long multicast_querier_interval;
	225	unsigned long multicast_query_interval;
	226	unsigned long multicast_query_response_interval;
	227	unsigned long multicast_startup_query_interval;
	228
	229	spinlock_t multicast_lock;
e8051688	230	struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 HX	231	struct hlist_head router_list;
	232	struct hlist_head mglist;
	233
	234	struct timer_list multicast_router_timer;
	235	struct timer_list multicast_querier_timer;
	236	struct timer_list multicast_query_timer;
	237	#endif
	238
1da177e4 LT	239	struct timer_list hello_timer;
	240	struct timer_list tcn_timer;
	241	struct timer_list topology_change_timer;
	242	struct timer_list gc_timer;
43b98c4a	243	struct kobject *ifobj;
1da177e4 LT	244	};
1da177e4 LT	245
68b7c895 HX	246	struct br_input_skb_cb {
68b7c895 HX	247	struct net_device *brdev;
32dec5dd	248	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641 HX	249	int igmp;
eb1d1641 HX	250	int mrouters_only;
32dec5dd	251	#endif
68b7c895 HX	252	};
	253
	254	#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
	255
32dec5dd YH	256	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	257	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
	258	#else
	259	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
	260	#endif
	261
28a16c97	262	#define br_printk(level, br, format, args...) \
	263	printk(level "%s: " format, (br)->dev->name, ##args)
	264
	265	#define br_err(__br, format, args...) \
	266	br_printk(KERN_ERR, __br, format, ##args)
	267	#define br_warn(__br, format, args...) \
	268	br_printk(KERN_WARNING, __br, format, ##args)
	269	#define br_notice(__br, format, args...) \
	270	br_printk(KERN_NOTICE, __br, format, ##args)
	271	#define br_info(__br, format, args...) \
	272	br_printk(KERN_INFO, __br, format, ##args)
	273
	274	#define br_debug(br, format, args...) \
	275	pr_debug("%s: " format, (br)->dev->name, ##args)
	276
1da177e4	277	extern struct notifier_block br_device_notifier;
fda93d92	278	extern const u8 br_group_address[ETH_ALEN];
1da177e4 LT	279
	280	/* called under bridge lock */
	281	static inline int br_is_root_bridge(const struct net_bridge *br)
	282	{
	283	return !memcmp(&br->bridge_id, &br->designated_root, 8);
	284	}
	285
1da177e4 LT	286	/* br_device.c */
1da177e4 LT	287	extern void br_dev_setup(struct net_device *dev);
6fef4c0c SH	288	extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
6fef4c0c SH	289	struct net_device *dev);
cfb478da	290	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a HX	291	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	292	{
	293	return br->dev->npinfo;
	294	}
	295
	296	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
	297	struct sk_buff *skb)
	298	{
	299	struct netpoll *np = p->np;
	300
	301	if (np)
	302	netpoll_send_skb(np, skb);
	303	}
	304
	305	extern int br_netpoll_enable(struct net_bridge_port *p);
	306	extern void br_netpoll_disable(struct net_bridge_port *p);
cfb478da	307	#else
91d2c34a HX	308	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	309	{
	310	return NULL;
	311	}
	312
9f70b0fc	313	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a HX	314	struct sk_buff *skb)
	315	{
	316	}
cfb478da	317
91d2c34a HX	318	static inline int br_netpoll_enable(struct net_bridge_port *p)
	319	{
	320	return 0;
	321	}
	322
	323	static inline void br_netpoll_disable(struct net_bridge_port *p)
	324	{
	325	}
cfb478da	326	#endif
1da177e4 LT	327
1da177e4 LT	328	/* br_fdb.c */
87a596e0	329	extern int br_fdb_init(void);
1da177e4	330	extern void br_fdb_fini(void);
9cf63747	331	extern void br_fdb_flush(struct net_bridge *br);
1da177e4 LT	332	extern void br_fdb_changeaddr(struct net_bridge_port *p,
	333	const unsigned char *newaddr);
	334	extern void br_fdb_cleanup(unsigned long arg);
	335	extern void br_fdb_delete_by_port(struct net_bridge *br,
1a620698	336	const struct net_bridge_port *p, int do_all);
1da177e4 LT	337	extern struct net_bridge_fdb_entry __br_fdb_get(struct net_bridge br,
1da177e4 LT	338	const unsigned char *addr);
da678292	339	extern int br_fdb_test_addr(struct net_device dev, unsigned char addr);
9d6f229f	340	extern int br_fdb_fillbuf(struct net_bridge br, void buf,
1da177e4 LT	341	unsigned long count, unsigned long off);
	342	extern int br_fdb_insert(struct net_bridge *br,
	343	struct net_bridge_port *source,
	344	const unsigned char *addr);
	345	extern void br_fdb_update(struct net_bridge *br,
	346	struct net_bridge_port *source,
	347	const unsigned char *addr);
	348
	349	/* br_forward.c */
	350	extern void br_deliver(const struct net_bridge_port *to,
	351	struct sk_buff *skb);
	352	extern int br_dev_queue_push_xmit(struct sk_buff *skb);
	353	extern void br_forward(const struct net_bridge_port *to,
7f7708f0	354	struct sk_buff skb, struct sk_buff skb0);
1da177e4	355	extern int br_forward_finish(struct sk_buff *skb);
e081e1e3	356	extern void br_flood_deliver(struct net_bridge br, struct sk_buff skb);
b33084be HX	357	extern void br_flood_forward(struct net_bridge br, struct sk_buff skb,
b33084be HX	358	struct sk_buff *skb2);
1da177e4 LT	359
1da177e4 LT	360	/* br_if.c */
269def7c	361	extern void br_port_carrier_check(struct net_bridge_port *p);
4aa678ba AD	362	extern int br_add_bridge(struct net net, const char name);
4aa678ba AD	363	extern int br_del_bridge(struct net net, const char name);
712d6954	364	extern void br_net_exit(struct net *net);
1da177e4 LT	365	extern int br_add_if(struct net_bridge *br,
	366	struct net_device *dev);
	367	extern int br_del_if(struct net_bridge *br,
	368	struct net_device *dev);
	369	extern int br_min_mtu(const struct net_bridge *br);
81d35307	370	extern void br_features_recompute(struct net_bridge *br);
1da177e4 LT	371
	372	/* br_input.c */
	373	extern int br_handle_frame_finish(struct sk_buff *skb);
ab95bfe0	374	extern struct sk_buff br_handle_frame(struct sk_buff skb);
1da177e4 LT	375
	376	/* br_ioctl.c */
	377	extern int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd);
881d966b	378	extern int br_ioctl_deviceless_stub(struct net net, unsigned int cmd, void __user arg);
1da177e4	379
eb1d1641 HX	380	/* br_multicast.c */
	381	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	382	extern int br_multicast_rcv(struct net_bridge *br,
	383	struct net_bridge_port *port,
	384	struct sk_buff *skb);
	385	extern struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	386	struct sk_buff *skb);
	387	extern void br_multicast_add_port(struct net_bridge_port *port);
	388	extern void br_multicast_del_port(struct net_bridge_port *port);
	389	extern void br_multicast_enable_port(struct net_bridge_port *port);
	390	extern void br_multicast_disable_port(struct net_bridge_port *port);
	391	extern void br_multicast_init(struct net_bridge *br);
	392	extern void br_multicast_open(struct net_bridge *br);
	393	extern void br_multicast_stop(struct net_bridge *br);
5cb5e947 HX	394	extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	395	struct sk_buff *skb);
	396	extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	397	struct sk_buff skb, struct sk_buff skb2);
0909e117 HX	398	extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
	399	extern int br_multicast_set_port_router(struct net_bridge_port *p,
	400	unsigned long val);
561f1103	401	extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
b195167f	402	extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
85b35269 SS	403
	404	static inline bool br_multicast_is_router(struct net_bridge *br)
	405	{
	406	return br->multicast_router == 2 \|\|
	407	(br->multicast_router == 1 &&
	408	timer_pending(&br->multicast_router_timer));
	409	}
eb1d1641 HX	410	#else
	411	static inline int br_multicast_rcv(struct net_bridge *br,
	412	struct net_bridge_port *port,
	413	struct sk_buff *skb)
	414	{
	415	return 0;
	416	}
	417
	418	static inline struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	419	struct sk_buff *skb)
	420	{
	421	return NULL;
	422	}
	423
	424	static inline void br_multicast_add_port(struct net_bridge_port *port)
	425	{
	426	}
	427
	428	static inline void br_multicast_del_port(struct net_bridge_port *port)
	429	{
	430	}
	431
	432	static inline void br_multicast_enable_port(struct net_bridge_port *port)
	433	{
	434	}
	435
	436	static inline void br_multicast_disable_port(struct net_bridge_port *port)
	437	{
	438	}
	439
	440	static inline void br_multicast_init(struct net_bridge *br)
	441	{
	442	}
	443
	444	static inline void br_multicast_open(struct net_bridge *br)
	445	{
	446	}
	447
	448	static inline void br_multicast_stop(struct net_bridge *br)
	449	{
	450	}
5cb5e947 HX	451
	452	static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	453	struct sk_buff *skb)
	454	{
	455	}
	456
	457	static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	458	struct sk_buff *skb,
	459	struct sk_buff *skb2)
	460	{
	461	}
eb1d1641 HX	462	static inline bool br_multicast_is_router(struct net_bridge *br)
eb1d1641 HX	463	{
85b35269	464	return 0;
eb1d1641	465	}
85b35269	466	#endif
eb1d1641	467
1da177e4	468	/* br_netfilter.c */
c0909713	469	#ifdef CONFIG_BRIDGE_NETFILTER
1da177e4 LT	470	extern int br_netfilter_init(void);
1da177e4 LT	471	extern void br_netfilter_fini(void);
4adf0af6	472	extern void br_netfilter_rtable_init(struct net_bridge *);
c0909713 SH	473	#else
	474	#define br_netfilter_init() (0)
	475	#define br_netfilter_fini() do { } while(0)
4adf0af6	476	#define br_netfilter_rtable_init(x)
c0909713	477	#endif
1da177e4 LT	478
	479	/* br_stp.c */
	480	extern void br_log_state(const struct net_bridge_port *p);
	481	extern struct net_bridge_port br_get_port(struct net_bridge br,
9d6f229f	482	u16 port_no);
1da177e4 LT	483	extern void br_init_port(struct net_bridge_port *p);
	484	extern void br_become_designated_port(struct net_bridge_port *p);
	485
	486	/* br_stp_if.c */
	487	extern void br_stp_enable_bridge(struct net_bridge *br);
	488	extern void br_stp_disable_bridge(struct net_bridge *br);
9cde0708	489	extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1da177e4 LT	490	extern void br_stp_enable_port(struct net_bridge_port *p);
	491	extern void br_stp_disable_port(struct net_bridge_port *p);
	492	extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
4505a3ef	493	extern void br_stp_change_bridge_id(struct net_bridge br, const unsigned char a);
1da177e4 LT	494	extern void br_stp_set_bridge_priority(struct net_bridge *br,
	495	u16 newprio);
	496	extern void br_stp_set_port_priority(struct net_bridge_port *p,
	497	u8 newprio);
	498	extern void br_stp_set_path_cost(struct net_bridge_port *p,
	499	u32 path_cost);
	500	extern ssize_t br_show_bridge_id(char buf, const struct bridge_id id);
	501
	502	/* br_stp_bpdu.c */
7c85fbf0 PM	503	struct stp_proto;
	504	extern void br_stp_rcv(const struct stp_proto proto, struct sk_buff skb,
	505	struct net_device *dev);
1da177e4 LT	506
	507	/* br_stp_timer.c */
	508	extern void br_stp_timer_init(struct net_bridge *br);
	509	extern void br_stp_port_timer_init(struct net_bridge_port *p);
	510	extern unsigned long br_timer_value(const struct timer_list *timer);
	511
	512	/* br.c */
da678292 MM	513	#if defined(CONFIG_ATM_LANE) \|\| defined(CONFIG_ATM_LANE_MODULE)
	514	extern int (br_fdb_test_addr_hook)(struct net_device dev, unsigned char *addr);
	515	#endif
1da177e4	516
11dc1f36	517	/* br_netlink.c */
32fe21c0	518	extern int br_netlink_init(void);
11dc1f36 SH	519	extern void br_netlink_fini(void);
	520	extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
	521
1da177e4 LT	522	#ifdef CONFIG_SYSFS
1da177e4 LT	523	/* br_sysfs_if.c */
52cf25d0	524	extern const struct sysfs_ops brport_sysfs_ops;
1da177e4	525	extern int br_sysfs_addif(struct net_bridge_port *p);
e0f43752	526	extern int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4 LT	527
	528	/* br_sysfs_br.c */
	529	extern int br_sysfs_addbr(struct net_device *dev);
	530	extern void br_sysfs_delbr(struct net_device *dev);
	531
	532	#else
	533
	534	#define br_sysfs_addif(p) (0)
e0f43752	535	#define br_sysfs_renameif(p) (0)
1da177e4 LT	536	#define br_sysfs_addbr(dev) (0)
	537	#define br_sysfs_delbr(dev) do { } while(0)
	538	#endif /* CONFIG_SYSFS */
	539
	540	#endif