[linux-2.6-block.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"

/* Control of forwarding link local multicast */
#define BR_GROUPFWD_DEFAULT	0
/* Don't allow forwarding control protocols like STP and LLDP */
#define BR_GROUPFWD_RESTRICTED	0x4007u

/* 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 IS_ENABLED(CONFIG_IPV6)
		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			updated;
	unsigned long			used;
	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 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;
	bool				mglist;
	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;
	unsigned long			designated_age;

	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_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)

static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
{
	struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
	return br_port_exists(dev) ? port : NULL;
}

static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
{
	return br_port_exists(dev) ?
		rtnl_dereference(dev->rx_handler_data) : NULL;
}

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];
#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

	u16				group_fwd_mask;

	/* 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 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 void br_dev_delete(struct net_device *dev, struct list_head *list);
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_change_mac_address(struct net_bridge *br, const u8 *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);
extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);

/* 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 netdev_features_t br_features_recompute(struct net_bridge *br,
	netdev_features_t features);

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

/* 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);

extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
extern int br_set_max_age(struct net_bridge *br, unsigned long x);


/* 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 bool 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 int br_stp_set_port_priority(struct net_bridge_port *p,
				    unsigned long newprio);
extern int br_stp_set_path_cost(struct net_bridge_port *p,
				unsigned long 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"
9cde0708 SH	31
515853cc	32	/* Control of forwarding link local multicast */
	33	#define BR_GROUPFWD_DEFAULT 0
	34	/* Don't allow forwarding control protocols like STP and LLDP */
	35	#define BR_GROUPFWD_RESTRICTED 0x4007u
	36
9cde0708 SH	37	/* Path to usermode spanning tree program */
9cde0708 SH	38	#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e	39
1da177e4 LT	40	typedef struct bridge_id bridge_id;
	41	typedef struct mac_addr mac_addr;
	42	typedef __u16 port_id;
	43
	44	struct bridge_id
	45	{
	46	unsigned char prio[2];
	47	unsigned char addr[6];
	48	};
	49
	50	struct mac_addr
	51	{
	52	unsigned char addr[6];
	53	};
	54
8ef2a9a5 YH	55	struct br_ip
	56	{
	57	union {
	58	__be32 ip4;
dfd56b8b	59	#if IS_ENABLED(CONFIG_IPV6)
08b202b6 YH	60	struct in6_addr ip6;
08b202b6 YH	61	#endif
8ef2a9a5 YH	62	} u;
	63	__be16 proto;
	64	};
	65
1da177e4 LT	66	struct net_bridge_fdb_entry
	67	{
	68	struct hlist_node hlist;
	69	struct net_bridge_port *dst;
	70
	71	struct rcu_head rcu;
7cd8861a	72	unsigned long updated;
7cd8861a	73	unsigned long used;
1da177e4 LT	74	mac_addr addr;
	75	unsigned char is_local;
	76	unsigned char is_static;
	77	};
	78
eb1d1641 HX	79	struct net_bridge_port_group {
eb1d1641 HX	80	struct net_bridge_port *port;
e8051688	81	struct net_bridge_port_group __rcu *next;
eb1d1641 HX	82	struct hlist_node mglist;
	83	struct rcu_head rcu;
	84	struct timer_list timer;
	85	struct timer_list query_timer;
8ef2a9a5	86	struct br_ip addr;
eb1d1641 HX	87	u32 queries_sent;
	88	};
	89
	90	struct net_bridge_mdb_entry
	91	{
	92	struct hlist_node hlist[2];
eb1d1641	93	struct net_bridge *br;
e8051688	94	struct net_bridge_port_group __rcu *ports;
eb1d1641 HX	95	struct rcu_head rcu;
	96	struct timer_list timer;
	97	struct timer_list query_timer;
8ef2a9a5	98	struct br_ip addr;
8a870178	99	bool mglist;
eb1d1641 HX	100	u32 queries_sent;
	101	};
	102
	103	struct net_bridge_mdb_htable
	104	{
	105	struct hlist_head *mhash;
	106	struct rcu_head rcu;
	107	struct net_bridge_mdb_htable *old;
	108	u32 size;
	109	u32 max;
	110	u32 secret;
	111	u32 ver;
	112	};
	113
1da177e4 LT	114	struct net_bridge_port
	115	{
	116	struct net_bridge *br;
	117	struct net_device *dev;
	118	struct list_head list;
	119
	120	/* STP */
	121	u8 priority;
	122	u8 state;
	123	u16 port_no;
	124	unsigned char topology_change_ack;
	125	unsigned char config_pending;
	126	port_id port_id;
	127	port_id designated_port;
	128	bridge_id designated_root;
	129	bridge_id designated_bridge;
	130	u32 path_cost;
	131	u32 designated_cost;
0c03150e	132	unsigned long designated_age;
1da177e4 LT	133
	134	struct timer_list forward_delay_timer;
	135	struct timer_list hold_timer;
	136	struct timer_list message_age_timer;
	137	struct kobject kobj;
	138	struct rcu_head rcu;
3982d3d2 FA	139
	140	unsigned long flags;
	141	#define BR_HAIRPIN_MODE 0x00000001
eb1d1641 HX	142
	143	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	144	u32 multicast_startup_queries_sent;
	145	unsigned char multicast_router;
	146	struct timer_list multicast_router_timer;
	147	struct timer_list multicast_query_timer;
	148	struct hlist_head mglist;
	149	struct hlist_node rlist;
	150	#endif
e0f43752 SA	151
	152	#ifdef CONFIG_SYSFS
	153	char sysfs_name[IFNAMSIZ];
	154	#endif
91d2c34a HX	155
	156	#ifdef CONFIG_NET_POLL_CONTROLLER
	157	struct netpoll *np;
	158	#endif
1da177e4 LT	159	};
1da177e4 LT	160
f350a0a8 JP	161	#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
f350a0a8 JP	162
b5ed54e9	163	static inline struct net_bridge_port br_port_get_rcu(const struct net_device dev)
	164	{
	165	struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
	166	return br_port_exists(dev) ? port : NULL;
	167	}
	168
ec1e5610	169	static inline struct net_bridge_port br_port_get_rtnl(struct net_device dev)
b5ed54e9	170	{
ec1e5610 ED	171	return br_port_exists(dev) ?
ec1e5610 ED	172	rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9	173	}
b5ed54e9	174
0eae88f3	175	struct br_cpu_netstats {
406818ff ED	176	u64 rx_packets;
	177	u64 rx_bytes;
	178	u64 tx_packets;
	179	u64 tx_bytes;
	180	struct u64_stats_sync syncp;
0eae88f3 ED	181	};
0eae88f3 ED	182
1da177e4 LT	183	struct net_bridge
	184	{
	185	spinlock_t lock;
	186	struct list_head port_list;
	187	struct net_device *dev;
14bb4789	188
0eae88f3	189	struct br_cpu_netstats __percpu *stats;
1da177e4 LT	190	spinlock_t hash_lock;
1da177e4 LT	191	struct hlist_head hash[BR_HASH_SIZE];
4adf0af6 SW	192	#ifdef CONFIG_BRIDGE_NETFILTER
4adf0af6 SW	193	struct rtable fake_rtable;
4df53d8b PM	194	bool nf_call_iptables;
	195	bool nf_call_ip6tables;
	196	bool nf_call_arptables;
4adf0af6	197	#endif
92c0574f SH	198	unsigned long flags;
92c0574f SH	199	#define BR_SET_MAC_ADDR 0x00000001
1da177e4	200
515853cc	201	u16 group_fwd_mask;
515853cc	202
1da177e4 LT	203	/* STP */
	204	bridge_id designated_root;
	205	bridge_id bridge_id;
	206	u32 root_path_cost;
	207	unsigned long max_age;
	208	unsigned long hello_time;
	209	unsigned long forward_delay;
	210	unsigned long bridge_max_age;
	211	unsigned long ageing_time;
	212	unsigned long bridge_hello_time;
	213	unsigned long bridge_forward_delay;
	214
fda93d92	215	u8 group_addr[ETH_ALEN];
1da177e4	216	u16 root_port;
9cde0708 SH	217
	218	enum {
	219	BR_NO_STP, /* no spanning tree */
	220	BR_KERNEL_STP, /* old STP in kernel */
	221	BR_USER_STP, /* new RSTP in userspace */
	222	} stp_enabled;
	223
1da177e4 LT	224	unsigned char topology_change;
	225	unsigned char topology_change_detected;
	226
eb1d1641 HX	227	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	228	unsigned char multicast_router;
	229
	230	u8 multicast_disabled:1;
	231
	232	u32 hash_elasticity;
	233	u32 hash_max;
	234
	235	u32 multicast_last_member_count;
	236	u32 multicast_startup_queries_sent;
	237	u32 multicast_startup_query_count;
	238
	239	unsigned long multicast_last_member_interval;
	240	unsigned long multicast_membership_interval;
	241	unsigned long multicast_querier_interval;
	242	unsigned long multicast_query_interval;
	243	unsigned long multicast_query_response_interval;
	244	unsigned long multicast_startup_query_interval;
	245
	246	spinlock_t multicast_lock;
e8051688	247	struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641	248	struct hlist_head router_list;
eb1d1641 HX	249
	250	struct timer_list multicast_router_timer;
	251	struct timer_list multicast_querier_timer;
	252	struct timer_list multicast_query_timer;
	253	#endif
	254
1da177e4 LT	255	struct timer_list hello_timer;
	256	struct timer_list tcn_timer;
	257	struct timer_list topology_change_timer;
	258	struct timer_list gc_timer;
43b98c4a	259	struct kobject *ifobj;
1da177e4 LT	260	};
1da177e4 LT	261
68b7c895 HX	262	struct br_input_skb_cb {
68b7c895 HX	263	struct net_device *brdev;
32dec5dd	264	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641 HX	265	int igmp;
eb1d1641 HX	266	int mrouters_only;
32dec5dd	267	#endif
68b7c895 HX	268	};
	269
	270	#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
	271
32dec5dd YH	272	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	273	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
	274	#else
	275	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
	276	#endif
	277
28a16c97	278	#define br_printk(level, br, format, args...) \
	279	printk(level "%s: " format, (br)->dev->name, ##args)
	280
	281	#define br_err(__br, format, args...) \
	282	br_printk(KERN_ERR, __br, format, ##args)
	283	#define br_warn(__br, format, args...) \
	284	br_printk(KERN_WARNING, __br, format, ##args)
	285	#define br_notice(__br, format, args...) \
	286	br_printk(KERN_NOTICE, __br, format, ##args)
	287	#define br_info(__br, format, args...) \
	288	br_printk(KERN_INFO, __br, format, ##args)
	289
	290	#define br_debug(br, format, args...) \
	291	pr_debug("%s: " format, (br)->dev->name, ##args)
	292
1da177e4	293	extern struct notifier_block br_device_notifier;
fda93d92	294	extern const u8 br_group_address[ETH_ALEN];
1da177e4 LT	295
	296	/* called under bridge lock */
	297	static inline int br_is_root_bridge(const struct net_bridge *br)
	298	{
	299	return !memcmp(&br->bridge_id, &br->designated_root, 8);
	300	}
	301
1da177e4 LT	302	/* br_device.c */
1da177e4 LT	303	extern void br_dev_setup(struct net_device *dev);
1ce5cce8	304	extern void br_dev_delete(struct net_device dev, struct list_head list);
6fef4c0c SH	305	extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
6fef4c0c SH	306	struct net_device *dev);
cfb478da	307	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a HX	308	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	309	{
	310	return br->dev->npinfo;
	311	}
	312
	313	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
	314	struct sk_buff *skb)
	315	{
	316	struct netpoll *np = p->np;
	317
	318	if (np)
	319	netpoll_send_skb(np, skb);
	320	}
	321
	322	extern int br_netpoll_enable(struct net_bridge_port *p);
	323	extern void br_netpoll_disable(struct net_bridge_port *p);
cfb478da	324	#else
91d2c34a HX	325	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	326	{
	327	return NULL;
	328	}
	329
9f70b0fc	330	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a HX	331	struct sk_buff *skb)
	332	{
	333	}
cfb478da	334
91d2c34a HX	335	static inline int br_netpoll_enable(struct net_bridge_port *p)
	336	{
	337	return 0;
	338	}
	339
	340	static inline void br_netpoll_disable(struct net_bridge_port *p)
	341	{
	342	}
cfb478da	343	#endif
1da177e4 LT	344
1da177e4 LT	345	/* br_fdb.c */
87a596e0	346	extern int br_fdb_init(void);
1da177e4	347	extern void br_fdb_fini(void);
9cf63747	348	extern void br_fdb_flush(struct net_bridge *br);
1da177e4 LT	349	extern void br_fdb_changeaddr(struct net_bridge_port *p,
1da177e4 LT	350	const unsigned char *newaddr);
43598813	351	extern void br_fdb_change_mac_address(struct net_bridge br, const u8 newaddr);
1da177e4 LT	352	extern void br_fdb_cleanup(unsigned long arg);
1da177e4 LT	353	extern void br_fdb_delete_by_port(struct net_bridge *br,
1a620698	354	const struct net_bridge_port *p, int do_all);
1da177e4 LT	355	extern struct net_bridge_fdb_entry __br_fdb_get(struct net_bridge br,
1da177e4 LT	356	const unsigned char *addr);
da678292	357	extern int br_fdb_test_addr(struct net_device dev, unsigned char addr);
9d6f229f	358	extern int br_fdb_fillbuf(struct net_bridge br, void buf,
1da177e4 LT	359	unsigned long count, unsigned long off);
	360	extern int br_fdb_insert(struct net_bridge *br,
	361	struct net_bridge_port *source,
	362	const unsigned char *addr);
	363	extern void br_fdb_update(struct net_bridge *br,
	364	struct net_bridge_port *source,
	365	const unsigned char *addr);
b078f0df	366	extern int br_fdb_dump(struct sk_buff skb, struct netlink_callback cb);
36fd2b63	367	extern int br_fdb_add(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
36fd2b63	368	extern int br_fdb_delete(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
1da177e4 LT	369
	370	/* br_forward.c */
	371	extern void br_deliver(const struct net_bridge_port *to,
	372	struct sk_buff *skb);
	373	extern int br_dev_queue_push_xmit(struct sk_buff *skb);
	374	extern void br_forward(const struct net_bridge_port *to,
7f7708f0	375	struct sk_buff skb, struct sk_buff skb0);
1da177e4	376	extern int br_forward_finish(struct sk_buff *skb);
e081e1e3	377	extern void br_flood_deliver(struct net_bridge br, struct sk_buff skb);
b33084be HX	378	extern void br_flood_forward(struct net_bridge br, struct sk_buff skb,
b33084be HX	379	struct sk_buff *skb2);
1da177e4 LT	380
1da177e4 LT	381	/* br_if.c */
269def7c	382	extern void br_port_carrier_check(struct net_bridge_port *p);
4aa678ba AD	383	extern int br_add_bridge(struct net net, const char name);
4aa678ba AD	384	extern int br_del_bridge(struct net net, const char name);
712d6954	385	extern void br_net_exit(struct net *net);
1da177e4 LT	386	extern int br_add_if(struct net_bridge *br,
	387	struct net_device *dev);
	388	extern int br_del_if(struct net_bridge *br,
	389	struct net_device *dev);
	390	extern int br_min_mtu(const struct net_bridge *br);
c8f44aff MM	391	extern netdev_features_t br_features_recompute(struct net_bridge *br,
c8f44aff MM	392	netdev_features_t features);
1da177e4 LT	393
	394	/* br_input.c */
	395	extern int br_handle_frame_finish(struct sk_buff *skb);
8a4eb573	396	extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 LT	397
	398	/* br_ioctl.c */
	399	extern int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd);
881d966b	400	extern int br_ioctl_deviceless_stub(struct net net, unsigned int cmd, void __user arg);
1da177e4	401
eb1d1641 HX	402	/* br_multicast.c */
	403	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	404	extern int br_multicast_rcv(struct net_bridge *br,
	405	struct net_bridge_port *port,
	406	struct sk_buff *skb);
	407	extern struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	408	struct sk_buff *skb);
	409	extern void br_multicast_add_port(struct net_bridge_port *port);
	410	extern void br_multicast_del_port(struct net_bridge_port *port);
	411	extern void br_multicast_enable_port(struct net_bridge_port *port);
	412	extern void br_multicast_disable_port(struct net_bridge_port *port);
	413	extern void br_multicast_init(struct net_bridge *br);
	414	extern void br_multicast_open(struct net_bridge *br);
	415	extern void br_multicast_stop(struct net_bridge *br);
5cb5e947 HX	416	extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	417	struct sk_buff *skb);
	418	extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	419	struct sk_buff skb, struct sk_buff skb2);
0909e117 HX	420	extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
	421	extern int br_multicast_set_port_router(struct net_bridge_port *p,
	422	unsigned long val);
561f1103	423	extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
b195167f	424	extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
85b35269 SS	425
	426	static inline bool br_multicast_is_router(struct net_bridge *br)
	427	{
	428	return br->multicast_router == 2 \|\|
	429	(br->multicast_router == 1 &&
	430	timer_pending(&br->multicast_router_timer));
	431	}
eb1d1641 HX	432	#else
	433	static inline int br_multicast_rcv(struct net_bridge *br,
	434	struct net_bridge_port *port,
	435	struct sk_buff *skb)
	436	{
	437	return 0;
	438	}
	439
	440	static inline struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	441	struct sk_buff *skb)
	442	{
	443	return NULL;
	444	}
	445
	446	static inline void br_multicast_add_port(struct net_bridge_port *port)
	447	{
	448	}
	449
	450	static inline void br_multicast_del_port(struct net_bridge_port *port)
	451	{
	452	}
	453
	454	static inline void br_multicast_enable_port(struct net_bridge_port *port)
	455	{
	456	}
	457
	458	static inline void br_multicast_disable_port(struct net_bridge_port *port)
	459	{
	460	}
	461
	462	static inline void br_multicast_init(struct net_bridge *br)
	463	{
	464	}
	465
	466	static inline void br_multicast_open(struct net_bridge *br)
	467	{
	468	}
	469
	470	static inline void br_multicast_stop(struct net_bridge *br)
	471	{
	472	}
5cb5e947 HX	473
	474	static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	475	struct sk_buff *skb)
	476	{
	477	}
	478
	479	static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	480	struct sk_buff *skb,
	481	struct sk_buff *skb2)
	482	{
	483	}
eb1d1641 HX	484	static inline bool br_multicast_is_router(struct net_bridge *br)
eb1d1641 HX	485	{
85b35269	486	return 0;
eb1d1641	487	}
85b35269	488	#endif
eb1d1641	489
1da177e4	490	/* br_netfilter.c */
c0909713	491	#ifdef CONFIG_BRIDGE_NETFILTER
1da177e4 LT	492	extern int br_netfilter_init(void);
1da177e4 LT	493	extern void br_netfilter_fini(void);
4adf0af6	494	extern void br_netfilter_rtable_init(struct net_bridge *);
c0909713 SH	495	#else
	496	#define br_netfilter_init() (0)
	497	#define br_netfilter_fini() do { } while(0)
4adf0af6	498	#define br_netfilter_rtable_init(x)
c0909713	499	#endif
1da177e4 LT	500
	501	/* br_stp.c */
	502	extern void br_log_state(const struct net_bridge_port *p);
	503	extern struct net_bridge_port br_get_port(struct net_bridge br,
9d6f229f	504	u16 port_no);
1da177e4 LT	505	extern void br_init_port(struct net_bridge_port *p);
	506	extern void br_become_designated_port(struct net_bridge_port *p);
	507
14f98f25	508	extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
	509	extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
	510	extern int br_set_max_age(struct net_bridge *br, unsigned long x);
	511
	512
1da177e4 LT	513	/* br_stp_if.c */
	514	extern void br_stp_enable_bridge(struct net_bridge *br);
	515	extern void br_stp_disable_bridge(struct net_bridge *br);
9cde0708	516	extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1da177e4 LT	517	extern void br_stp_enable_port(struct net_bridge_port *p);
1da177e4 LT	518	extern void br_stp_disable_port(struct net_bridge_port *p);
edf947f1	519	extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
4505a3ef	520	extern void br_stp_change_bridge_id(struct net_bridge br, const unsigned char a);
1da177e4 LT	521	extern void br_stp_set_bridge_priority(struct net_bridge *br,
1da177e4 LT	522	u16 newprio);
14f98f25	523	extern int br_stp_set_port_priority(struct net_bridge_port *p,
	524	unsigned long newprio);
	525	extern int br_stp_set_path_cost(struct net_bridge_port *p,
	526	unsigned long path_cost);
1da177e4 LT	527	extern ssize_t br_show_bridge_id(char buf, const struct bridge_id id);
	528
	529	/* br_stp_bpdu.c */
7c85fbf0 PM	530	struct stp_proto;
	531	extern void br_stp_rcv(const struct stp_proto proto, struct sk_buff skb,
	532	struct net_device *dev);
1da177e4 LT	533
	534	/* br_stp_timer.c */
	535	extern void br_stp_timer_init(struct net_bridge *br);
	536	extern void br_stp_port_timer_init(struct net_bridge_port *p);
	537	extern unsigned long br_timer_value(const struct timer_list *timer);
	538
	539	/* br.c */
da678292 MM	540	#if defined(CONFIG_ATM_LANE) \|\| defined(CONFIG_ATM_LANE_MODULE)
	541	extern int (br_fdb_test_addr_hook)(struct net_device dev, unsigned char *addr);
	542	#endif
1da177e4	543
11dc1f36	544	/* br_netlink.c */
32fe21c0	545	extern int br_netlink_init(void);
11dc1f36 SH	546	extern void br_netlink_fini(void);
	547	extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
	548
1da177e4 LT	549	#ifdef CONFIG_SYSFS
1da177e4 LT	550	/* br_sysfs_if.c */
52cf25d0	551	extern const struct sysfs_ops brport_sysfs_ops;
1da177e4	552	extern int br_sysfs_addif(struct net_bridge_port *p);
e0f43752	553	extern int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4 LT	554
	555	/* br_sysfs_br.c */
	556	extern int br_sysfs_addbr(struct net_device *dev);
	557	extern void br_sysfs_delbr(struct net_device *dev);
	558
	559	#else
	560
	561	#define br_sysfs_addif(p) (0)
e0f43752	562	#define br_sysfs_renameif(p) (0)
1da177e4 LT	563	#define br_sysfs_addbr(dev) (0)
	564	#define br_sysfs_delbr(dev) do { } while(0)
	565	#endif /* CONFIG_SYSFS */
	566
	567	#endif