[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"

/* 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			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

	/* 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 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);
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 u32 br_features_recompute(struct net_bridge *br, u32 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"
	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;
7cd8861a	67	unsigned long updated;
7cd8861a	68	unsigned long used;
1da177e4 LT	69	mac_addr addr;
	70	unsigned char is_local;
	71	unsigned char is_static;
	72	};
	73
eb1d1641 HX	74	struct net_bridge_port_group {
eb1d1641 HX	75	struct net_bridge_port *port;
e8051688	76	struct net_bridge_port_group __rcu *next;
eb1d1641 HX	77	struct hlist_node mglist;
	78	struct rcu_head rcu;
	79	struct timer_list timer;
	80	struct timer_list query_timer;
8ef2a9a5	81	struct br_ip addr;
eb1d1641 HX	82	u32 queries_sent;
	83	};
	84
	85	struct net_bridge_mdb_entry
	86	{
	87	struct hlist_node hlist[2];
eb1d1641	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;
8a870178	94	bool mglist;
eb1d1641 HX	95	u32 queries_sent;
	96	};
	97
	98	struct net_bridge_mdb_htable
	99	{
	100	struct hlist_head *mhash;
	101	struct rcu_head rcu;
	102	struct net_bridge_mdb_htable *old;
	103	u32 size;
	104	u32 max;
	105	u32 secret;
	106	u32 ver;
	107	};
	108
1da177e4 LT	109	struct net_bridge_port
	110	{
	111	struct net_bridge *br;
	112	struct net_device *dev;
	113	struct list_head list;
	114
	115	/* STP */
	116	u8 priority;
	117	u8 state;
	118	u16 port_no;
	119	unsigned char topology_change_ack;
	120	unsigned char config_pending;
	121	port_id port_id;
	122	port_id designated_port;
	123	bridge_id designated_root;
	124	bridge_id designated_bridge;
	125	u32 path_cost;
	126	u32 designated_cost;
0c03150e	127	unsigned long designated_age;
1da177e4 LT	128
	129	struct timer_list forward_delay_timer;
	130	struct timer_list hold_timer;
	131	struct timer_list message_age_timer;
	132	struct kobject kobj;
	133	struct rcu_head rcu;
3982d3d2 FA	134
	135	unsigned long flags;
	136	#define BR_HAIRPIN_MODE 0x00000001
eb1d1641 HX	137
	138	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	139	u32 multicast_startup_queries_sent;
	140	unsigned char multicast_router;
	141	struct timer_list multicast_router_timer;
	142	struct timer_list multicast_query_timer;
	143	struct hlist_head mglist;
	144	struct hlist_node rlist;
	145	#endif
e0f43752 SA	146
	147	#ifdef CONFIG_SYSFS
	148	char sysfs_name[IFNAMSIZ];
	149	#endif
91d2c34a HX	150
	151	#ifdef CONFIG_NET_POLL_CONTROLLER
	152	struct netpoll *np;
	153	#endif
1da177e4 LT	154	};
1da177e4 LT	155
f350a0a8 JP	156	#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
f350a0a8 JP	157
b5ed54e9	158	static inline struct net_bridge_port br_port_get_rcu(const struct net_device dev)
	159	{
	160	struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
	161	return br_port_exists(dev) ? port : NULL;
	162	}
	163
ec1e5610	164	static inline struct net_bridge_port br_port_get_rtnl(struct net_device dev)
b5ed54e9	165	{
ec1e5610 ED	166	return br_port_exists(dev) ?
ec1e5610 ED	167	rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9	168	}
b5ed54e9	169
0eae88f3	170	struct br_cpu_netstats {
406818ff ED	171	u64 rx_packets;
	172	u64 rx_bytes;
	173	u64 tx_packets;
	174	u64 tx_bytes;
	175	struct u64_stats_sync syncp;
0eae88f3 ED	176	};
0eae88f3 ED	177
1da177e4 LT	178	struct net_bridge
	179	{
	180	spinlock_t lock;
	181	struct list_head port_list;
	182	struct net_device *dev;
14bb4789	183
0eae88f3	184	struct br_cpu_netstats __percpu *stats;
1da177e4 LT	185	spinlock_t hash_lock;
1da177e4 LT	186	struct hlist_head hash[BR_HASH_SIZE];
4adf0af6 SW	187	#ifdef CONFIG_BRIDGE_NETFILTER
4adf0af6 SW	188	struct rtable fake_rtable;
4df53d8b PM	189	bool nf_call_iptables;
	190	bool nf_call_ip6tables;
	191	bool nf_call_arptables;
4adf0af6	192	#endif
92c0574f SH	193	unsigned long flags;
92c0574f SH	194	#define BR_SET_MAC_ADDR 0x00000001
1da177e4 LT	195
	196	/* STP */
	197	bridge_id designated_root;
	198	bridge_id bridge_id;
	199	u32 root_path_cost;
	200	unsigned long max_age;
	201	unsigned long hello_time;
	202	unsigned long forward_delay;
	203	unsigned long bridge_max_age;
	204	unsigned long ageing_time;
	205	unsigned long bridge_hello_time;
	206	unsigned long bridge_forward_delay;
	207
fda93d92	208	u8 group_addr[ETH_ALEN];
1da177e4	209	u16 root_port;
9cde0708 SH	210
	211	enum {
	212	BR_NO_STP, /* no spanning tree */
	213	BR_KERNEL_STP, /* old STP in kernel */
	214	BR_USER_STP, /* new RSTP in userspace */
	215	} stp_enabled;
	216
1da177e4 LT	217	unsigned char topology_change;
	218	unsigned char topology_change_detected;
	219
eb1d1641 HX	220	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	221	unsigned char multicast_router;
	222
	223	u8 multicast_disabled:1;
	224
	225	u32 hash_elasticity;
	226	u32 hash_max;
	227
	228	u32 multicast_last_member_count;
	229	u32 multicast_startup_queries_sent;
	230	u32 multicast_startup_query_count;
	231
	232	unsigned long multicast_last_member_interval;
	233	unsigned long multicast_membership_interval;
	234	unsigned long multicast_querier_interval;
	235	unsigned long multicast_query_interval;
	236	unsigned long multicast_query_response_interval;
	237	unsigned long multicast_startup_query_interval;
	238
	239	spinlock_t multicast_lock;
e8051688	240	struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641	241	struct hlist_head router_list;
eb1d1641 HX	242
	243	struct timer_list multicast_router_timer;
	244	struct timer_list multicast_querier_timer;
	245	struct timer_list multicast_query_timer;
	246	#endif
	247
1da177e4 LT	248	struct timer_list hello_timer;
	249	struct timer_list tcn_timer;
	250	struct timer_list topology_change_timer;
	251	struct timer_list gc_timer;
43b98c4a	252	struct kobject *ifobj;
1da177e4 LT	253	};
1da177e4 LT	254
68b7c895 HX	255	struct br_input_skb_cb {
68b7c895 HX	256	struct net_device *brdev;
32dec5dd	257	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641 HX	258	int igmp;
eb1d1641 HX	259	int mrouters_only;
32dec5dd	260	#endif
68b7c895 HX	261	};
	262
	263	#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
	264
32dec5dd YH	265	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	266	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
	267	#else
	268	# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
	269	#endif
	270
28a16c97	271	#define br_printk(level, br, format, args...) \
	272	printk(level "%s: " format, (br)->dev->name, ##args)
	273
	274	#define br_err(__br, format, args...) \
	275	br_printk(KERN_ERR, __br, format, ##args)
	276	#define br_warn(__br, format, args...) \
	277	br_printk(KERN_WARNING, __br, format, ##args)
	278	#define br_notice(__br, format, args...) \
	279	br_printk(KERN_NOTICE, __br, format, ##args)
	280	#define br_info(__br, format, args...) \
	281	br_printk(KERN_INFO, __br, format, ##args)
	282
	283	#define br_debug(br, format, args...) \
	284	pr_debug("%s: " format, (br)->dev->name, ##args)
	285
1da177e4	286	extern struct notifier_block br_device_notifier;
fda93d92	287	extern const u8 br_group_address[ETH_ALEN];
1da177e4 LT	288
	289	/* called under bridge lock */
	290	static inline int br_is_root_bridge(const struct net_bridge *br)
	291	{
	292	return !memcmp(&br->bridge_id, &br->designated_root, 8);
	293	}
	294
1da177e4 LT	295	/* br_device.c */
1da177e4 LT	296	extern void br_dev_setup(struct net_device *dev);
6fef4c0c SH	297	extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
6fef4c0c SH	298	struct net_device *dev);
cfb478da	299	#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a HX	300	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	301	{
	302	return br->dev->npinfo;
	303	}
	304
	305	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
	306	struct sk_buff *skb)
	307	{
	308	struct netpoll *np = p->np;
	309
	310	if (np)
	311	netpoll_send_skb(np, skb);
	312	}
	313
	314	extern int br_netpoll_enable(struct net_bridge_port *p);
	315	extern void br_netpoll_disable(struct net_bridge_port *p);
cfb478da	316	#else
91d2c34a HX	317	static inline struct netpoll_info br_netpoll_info(struct net_bridge br)
	318	{
	319	return NULL;
	320	}
	321
9f70b0fc	322	static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a HX	323	struct sk_buff *skb)
	324	{
	325	}
cfb478da	326
91d2c34a HX	327	static inline int br_netpoll_enable(struct net_bridge_port *p)
	328	{
	329	return 0;
	330	}
	331
	332	static inline void br_netpoll_disable(struct net_bridge_port *p)
	333	{
	334	}
cfb478da	335	#endif
1da177e4 LT	336
1da177e4 LT	337	/* br_fdb.c */
87a596e0	338	extern int br_fdb_init(void);
1da177e4	339	extern void br_fdb_fini(void);
9cf63747	340	extern void br_fdb_flush(struct net_bridge *br);
1da177e4 LT	341	extern void br_fdb_changeaddr(struct net_bridge_port *p,
	342	const unsigned char *newaddr);
	343	extern void br_fdb_cleanup(unsigned long arg);
	344	extern void br_fdb_delete_by_port(struct net_bridge *br,
1a620698	345	const struct net_bridge_port *p, int do_all);
1da177e4 LT	346	extern struct net_bridge_fdb_entry __br_fdb_get(struct net_bridge br,
1da177e4 LT	347	const unsigned char *addr);
da678292	348	extern int br_fdb_test_addr(struct net_device dev, unsigned char addr);
9d6f229f	349	extern int br_fdb_fillbuf(struct net_bridge br, void buf,
1da177e4 LT	350	unsigned long count, unsigned long off);
	351	extern int br_fdb_insert(struct net_bridge *br,
	352	struct net_bridge_port *source,
	353	const unsigned char *addr);
	354	extern void br_fdb_update(struct net_bridge *br,
	355	struct net_bridge_port *source,
	356	const unsigned char *addr);
b078f0df	357	extern int br_fdb_dump(struct sk_buff skb, struct netlink_callback cb);
36fd2b63	358	extern int br_fdb_add(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
36fd2b63	359	extern int br_fdb_delete(struct sk_buff skb, struct nlmsghdr nlh, void *arg);
1da177e4 LT	360
	361	/* br_forward.c */
	362	extern void br_deliver(const struct net_bridge_port *to,
	363	struct sk_buff *skb);
	364	extern int br_dev_queue_push_xmit(struct sk_buff *skb);
	365	extern void br_forward(const struct net_bridge_port *to,
7f7708f0	366	struct sk_buff skb, struct sk_buff skb0);
1da177e4	367	extern int br_forward_finish(struct sk_buff *skb);
e081e1e3	368	extern void br_flood_deliver(struct net_bridge br, struct sk_buff skb);
b33084be HX	369	extern void br_flood_forward(struct net_bridge br, struct sk_buff skb,
b33084be HX	370	struct sk_buff *skb2);
1da177e4 LT	371
1da177e4 LT	372	/* br_if.c */
269def7c	373	extern void br_port_carrier_check(struct net_bridge_port *p);
4aa678ba AD	374	extern int br_add_bridge(struct net net, const char name);
4aa678ba AD	375	extern int br_del_bridge(struct net net, const char name);
712d6954	376	extern void br_net_exit(struct net *net);
1da177e4 LT	377	extern int br_add_if(struct net_bridge *br,
	378	struct net_device *dev);
	379	extern int br_del_if(struct net_bridge *br,
	380	struct net_device *dev);
	381	extern int br_min_mtu(const struct net_bridge *br);
c4d27ef9	382	extern u32 br_features_recompute(struct net_bridge *br, u32 features);
1da177e4 LT	383
	384	/* br_input.c */
	385	extern int br_handle_frame_finish(struct sk_buff *skb);
8a4eb573	386	extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 LT	387
	388	/* br_ioctl.c */
	389	extern int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd);
881d966b	390	extern int br_ioctl_deviceless_stub(struct net net, unsigned int cmd, void __user arg);
1da177e4	391
eb1d1641 HX	392	/* br_multicast.c */
	393	#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	394	extern int br_multicast_rcv(struct net_bridge *br,
	395	struct net_bridge_port *port,
	396	struct sk_buff *skb);
	397	extern struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	398	struct sk_buff *skb);
	399	extern void br_multicast_add_port(struct net_bridge_port *port);
	400	extern void br_multicast_del_port(struct net_bridge_port *port);
	401	extern void br_multicast_enable_port(struct net_bridge_port *port);
	402	extern void br_multicast_disable_port(struct net_bridge_port *port);
	403	extern void br_multicast_init(struct net_bridge *br);
	404	extern void br_multicast_open(struct net_bridge *br);
	405	extern void br_multicast_stop(struct net_bridge *br);
5cb5e947 HX	406	extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	407	struct sk_buff *skb);
	408	extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	409	struct sk_buff skb, struct sk_buff skb2);
0909e117 HX	410	extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
	411	extern int br_multicast_set_port_router(struct net_bridge_port *p,
	412	unsigned long val);
561f1103	413	extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
b195167f	414	extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
85b35269 SS	415
	416	static inline bool br_multicast_is_router(struct net_bridge *br)
	417	{
	418	return br->multicast_router == 2 \|\|
	419	(br->multicast_router == 1 &&
	420	timer_pending(&br->multicast_router_timer));
	421	}
eb1d1641 HX	422	#else
	423	static inline int br_multicast_rcv(struct net_bridge *br,
	424	struct net_bridge_port *port,
	425	struct sk_buff *skb)
	426	{
	427	return 0;
	428	}
	429
	430	static inline struct net_bridge_mdb_entry br_mdb_get(struct net_bridge br,
	431	struct sk_buff *skb)
	432	{
	433	return NULL;
	434	}
	435
	436	static inline void br_multicast_add_port(struct net_bridge_port *port)
	437	{
	438	}
	439
	440	static inline void br_multicast_del_port(struct net_bridge_port *port)
	441	{
	442	}
	443
	444	static inline void br_multicast_enable_port(struct net_bridge_port *port)
	445	{
	446	}
	447
	448	static inline void br_multicast_disable_port(struct net_bridge_port *port)
	449	{
	450	}
	451
	452	static inline void br_multicast_init(struct net_bridge *br)
	453	{
	454	}
	455
	456	static inline void br_multicast_open(struct net_bridge *br)
	457	{
	458	}
	459
	460	static inline void br_multicast_stop(struct net_bridge *br)
	461	{
	462	}
5cb5e947 HX	463
	464	static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
	465	struct sk_buff *skb)
	466	{
	467	}
	468
	469	static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
	470	struct sk_buff *skb,
	471	struct sk_buff *skb2)
	472	{
	473	}
eb1d1641 HX	474	static inline bool br_multicast_is_router(struct net_bridge *br)
eb1d1641 HX	475	{
85b35269	476	return 0;
eb1d1641	477	}
85b35269	478	#endif
eb1d1641	479
1da177e4	480	/* br_netfilter.c */
c0909713	481	#ifdef CONFIG_BRIDGE_NETFILTER
1da177e4 LT	482	extern int br_netfilter_init(void);
1da177e4 LT	483	extern void br_netfilter_fini(void);
4adf0af6	484	extern void br_netfilter_rtable_init(struct net_bridge *);
c0909713 SH	485	#else
	486	#define br_netfilter_init() (0)
	487	#define br_netfilter_fini() do { } while(0)
4adf0af6	488	#define br_netfilter_rtable_init(x)
c0909713	489	#endif
1da177e4 LT	490
	491	/* br_stp.c */
	492	extern void br_log_state(const struct net_bridge_port *p);
	493	extern struct net_bridge_port br_get_port(struct net_bridge br,
9d6f229f	494	u16 port_no);
1da177e4 LT	495	extern void br_init_port(struct net_bridge_port *p);
	496	extern void br_become_designated_port(struct net_bridge_port *p);
	497
14f98f25	498	extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
	499	extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
	500	extern int br_set_max_age(struct net_bridge *br, unsigned long x);
	501
	502
1da177e4 LT	503	/* br_stp_if.c */
	504	extern void br_stp_enable_bridge(struct net_bridge *br);
	505	extern void br_stp_disable_bridge(struct net_bridge *br);
9cde0708	506	extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1da177e4 LT	507	extern void br_stp_enable_port(struct net_bridge_port *p);
1da177e4 LT	508	extern void br_stp_disable_port(struct net_bridge_port *p);
edf947f1	509	extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
4505a3ef	510	extern void br_stp_change_bridge_id(struct net_bridge br, const unsigned char a);
1da177e4 LT	511	extern void br_stp_set_bridge_priority(struct net_bridge *br,
1da177e4 LT	512	u16 newprio);
14f98f25	513	extern int br_stp_set_port_priority(struct net_bridge_port *p,
	514	unsigned long newprio);
	515	extern int br_stp_set_path_cost(struct net_bridge_port *p,
	516	unsigned long path_cost);
1da177e4 LT	517	extern ssize_t br_show_bridge_id(char buf, const struct bridge_id id);
	518
	519	/* br_stp_bpdu.c */
7c85fbf0 PM	520	struct stp_proto;
	521	extern void br_stp_rcv(const struct stp_proto proto, struct sk_buff skb,
	522	struct net_device *dev);
1da177e4 LT	523
	524	/* br_stp_timer.c */
	525	extern void br_stp_timer_init(struct net_bridge *br);
	526	extern void br_stp_port_timer_init(struct net_bridge_port *p);
	527	extern unsigned long br_timer_value(const struct timer_list *timer);
	528
	529	/* br.c */
da678292 MM	530	#if defined(CONFIG_ATM_LANE) \|\| defined(CONFIG_ATM_LANE_MODULE)
	531	extern int (br_fdb_test_addr_hook)(struct net_device dev, unsigned char *addr);
	532	#endif
1da177e4	533
11dc1f36	534	/* br_netlink.c */
32fe21c0	535	extern int br_netlink_init(void);
11dc1f36 SH	536	extern void br_netlink_fini(void);
	537	extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
	538
1da177e4 LT	539	#ifdef CONFIG_SYSFS
1da177e4 LT	540	/* br_sysfs_if.c */
52cf25d0	541	extern const struct sysfs_ops brport_sysfs_ops;
1da177e4	542	extern int br_sysfs_addif(struct net_bridge_port *p);
e0f43752	543	extern int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4 LT	544
	545	/* br_sysfs_br.c */
	546	extern int br_sysfs_addbr(struct net_device *dev);
	547	extern void br_sysfs_delbr(struct net_device *dev);
	548
	549	#else
	550
	551	#define br_sysfs_addif(p) (0)
e0f43752	552	#define br_sysfs_renameif(p) (0)
1da177e4 LT	553	#define br_sysfs_addbr(dev) (0)
	554	#define br_sysfs_delbr(dev) do { } while(0)
	555	#endif /* CONFIG_SYSFS */
	556
	557	#endif