[linux-2.6-block.git] / include / linux / sunrpc / xprt.h

/*
 *  linux/include/linux/sunrpc/xprt.h
 *
 *  Declarations for the RPC transport interface.
 *
 *  Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef _LINUX_SUNRPC_XPRT_H
#define _LINUX_SUNRPC_XPRT_H

#include <linux/uio.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kref.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xdr.h>
#include <linux/sunrpc/msg_prot.h>

#ifdef __KERNEL__

#define RPC_MIN_SLOT_TABLE	(2U)
#define RPC_DEF_SLOT_TABLE	(16U)
#define RPC_MAX_SLOT_TABLE	(128U)

/*
 * This describes a timeout strategy
 */
struct rpc_timeout {
	unsigned long		to_initval,		/* initial timeout */
				to_maxval,		/* max timeout */
				to_increment;		/* if !exponential */
	unsigned int		to_retries;		/* max # of retries */
	unsigned char		to_exponential;
};

enum rpc_display_format_t {
	RPC_DISPLAY_ADDR = 0,
	RPC_DISPLAY_PORT,
	RPC_DISPLAY_PROTO,
	RPC_DISPLAY_ALL,
	RPC_DISPLAY_HEX_ADDR,
	RPC_DISPLAY_HEX_PORT,
	RPC_DISPLAY_UNIVERSAL_ADDR,
	RPC_DISPLAY_NETID,
	RPC_DISPLAY_MAX,
};

struct rpc_task;
struct rpc_xprt;
struct seq_file;

/*
 * This describes a complete RPC request
 */
struct rpc_rqst {
	/*
	 * This is the user-visible part
	 */
	struct rpc_xprt *	rq_xprt;		/* RPC client */
	struct xdr_buf		rq_snd_buf;		/* send buffer */
	struct xdr_buf		rq_rcv_buf;		/* recv buffer */

	/*
	 * This is the private part
	 */
	struct rpc_task *	rq_task;	/* RPC task data */
	__be32			rq_xid;		/* request XID */
	int			rq_cong;	/* has incremented xprt->cong */
	int			rq_received;	/* receive completed */
	u32			rq_seqno;	/* gss seq no. used on req. */
	int			rq_enc_pages_num;
	struct page		**rq_enc_pages;	/* scratch pages for use by
						   gss privacy code */
	void (*rq_release_snd_buf)(struct rpc_rqst *); /* release rq_enc_pages */
	struct list_head	rq_list;

	__u32 *			rq_buffer;	/* XDR encode buffer */
	size_t			rq_bufsize,
				rq_callsize,
				rq_rcvsize;

	struct xdr_buf		rq_private_buf;		/* The receive buffer
							 * used in the softirq.
							 */
	unsigned long		rq_majortimeo;	/* major timeout alarm */
	unsigned long		rq_timeout;	/* Current timeout value */
	unsigned int		rq_retries;	/* # of retries */
	
	/*
	 * Partial send handling
	 */
	u32			rq_bytes_sent;	/* Bytes we have sent */

	unsigned long		rq_xtime;	/* when transmitted */
	int			rq_ntrans;
};
#define rq_svec			rq_snd_buf.head
#define rq_slen			rq_snd_buf.len

struct rpc_xprt_ops {
	void		(*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize);
	int		(*reserve_xprt)(struct rpc_task *task);
	void		(*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task);
	void		(*rpcbind)(struct rpc_task *task);
	void		(*set_port)(struct rpc_xprt *xprt, unsigned short port);
	void		(*connect)(struct rpc_task *task);
	void *		(*buf_alloc)(struct rpc_task *task, size_t size);
	void		(*buf_free)(void *buffer);
	int		(*send_request)(struct rpc_task *task);
	void		(*set_retrans_timeout)(struct rpc_task *task);
	void		(*timer)(struct rpc_task *task);
	void		(*release_request)(struct rpc_task *task);
	void		(*close)(struct rpc_xprt *xprt);
	void		(*destroy)(struct rpc_xprt *xprt);
	void		(*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq);
};

struct rpc_xprt {
	struct kref		kref;		/* Reference count */
	struct rpc_xprt_ops *	ops;		/* transport methods */

	struct rpc_timeout	timeout;	/* timeout parms */
	struct sockaddr_storage	addr;		/* server address */
	size_t			addrlen;	/* size of server address */
	int			prot;		/* IP protocol */

	unsigned long		cong;		/* current congestion */
	unsigned long		cwnd;		/* congestion window */

	size_t			max_payload;	/* largest RPC payload size,
						   in bytes */
	unsigned int		tsh_size;	/* size of transport specific
						   header */

	struct rpc_wait_queue	binding;	/* requests waiting on rpcbind */
	struct rpc_wait_queue	sending;	/* requests waiting to send */
	struct rpc_wait_queue	resend;		/* requests waiting to resend */
	struct rpc_wait_queue	pending;	/* requests in flight */
	struct rpc_wait_queue	backlog;	/* waiting for slot */
	struct list_head	free;		/* free slots */
	struct rpc_rqst *	slot;		/* slot table storage */
	unsigned int		max_reqs;	/* total slots */
	unsigned long		state;		/* transport state */
	unsigned char		shutdown   : 1,	/* being shut down */
				resvport   : 1; /* use a reserved port */
	unsigned int		bind_index;	/* bind function index */

	/*
	 * Connection of transports
	 */
	unsigned long		connect_timeout,
				bind_timeout,
				reestablish_timeout;

	/*
	 * Disconnection of idle transports
	 */
	struct work_struct	task_cleanup;
	struct timer_list	timer;
	unsigned long		last_used,
				idle_timeout;

	/*
	 * Send stuff
	 */
	spinlock_t		transport_lock;	/* lock transport info */
	spinlock_t		reserve_lock;	/* lock slot table */
	u32			xid;		/* Next XID value to use */
	struct rpc_task *	snd_task;	/* Task blocked in send */
	struct list_head	recv;

	struct {
		unsigned long		bind_count,	/* total number of binds */
					connect_count,	/* total number of connects */
					connect_start,	/* connect start timestamp */
					connect_time,	/* jiffies waiting for connect */
					sends,		/* how many complete requests */
					recvs,		/* how many complete requests */
					bad_xids;	/* lookup_rqst didn't find XID */

		unsigned long long	req_u,		/* average requests on the wire */
					bklog_u;	/* backlog queue utilization */
	} stat;

	char *			address_strings[RPC_DISPLAY_MAX];
};

struct xprt_create {
	int			ident;		/* XPRT_TRANSPORT identifier */
	struct sockaddr *	srcaddr;	/* optional local address */
	struct sockaddr *	dstaddr;	/* remote peer address */
	size_t			addrlen;
	struct rpc_timeout *	timeout;	/* optional timeout parameters */
};

struct xprt_class {
	struct list_head	list;
	int			ident;		/* XPRT_TRANSPORT identifier */
	struct rpc_xprt *	(*setup)(struct xprt_create *);
	struct module		*owner;
	char			name[32];
};

/*
 * Transport operations used by ULPs
 */
void			xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr);

/*
 * Generic internal transport functions
 */
struct rpc_xprt		*xprt_create_transport(struct xprt_create *args);
void			xprt_connect(struct rpc_task *task);
void			xprt_reserve(struct rpc_task *task);
int			xprt_reserve_xprt(struct rpc_task *task);
int			xprt_reserve_xprt_cong(struct rpc_task *task);
int			xprt_prepare_transmit(struct rpc_task *task);
void			xprt_transmit(struct rpc_task *task);
void			xprt_end_transmit(struct rpc_task *task);
int			xprt_adjust_timeout(struct rpc_rqst *req);
void			xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
void			xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
void			xprt_release(struct rpc_task *task);
struct rpc_xprt *	xprt_get(struct rpc_xprt *xprt);
void			xprt_put(struct rpc_xprt *xprt);

static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)
{
	return p + xprt->tsh_size;
}

/*
 * Transport switch helper functions
 */
int			xprt_register_transport(struct xprt_class *type);
int			xprt_unregister_transport(struct xprt_class *type);
void			xprt_set_retrans_timeout_def(struct rpc_task *task);
void			xprt_set_retrans_timeout_rtt(struct rpc_task *task);
void			xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
void			xprt_wait_for_buffer_space(struct rpc_task *task);
void			xprt_write_space(struct rpc_xprt *xprt);
void			xprt_update_rtt(struct rpc_task *task);
void			xprt_adjust_cwnd(struct rpc_task *task, int result);
struct rpc_rqst *	xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
void			xprt_complete_rqst(struct rpc_task *task, int copied);
void			xprt_release_rqst_cong(struct rpc_task *task);
void			xprt_disconnect(struct rpc_xprt *xprt);
void			xprt_force_disconnect(struct rpc_xprt *xprt);

/*
 * Reserved bit positions in xprt->state
 */
#define XPRT_LOCKED		(0)
#define XPRT_CONNECTED		(1)
#define XPRT_CONNECTING		(2)
#define XPRT_CLOSE_WAIT		(3)
#define XPRT_BOUND		(4)
#define XPRT_BINDING		(5)
#define XPRT_CLOSING		(6)

static inline void xprt_set_connected(struct rpc_xprt *xprt)
{
	set_bit(XPRT_CONNECTED, &xprt->state);
}

static inline void xprt_clear_connected(struct rpc_xprt *xprt)
{
	clear_bit(XPRT_CONNECTED, &xprt->state);
}

static inline int xprt_connected(struct rpc_xprt *xprt)
{
	return test_bit(XPRT_CONNECTED, &xprt->state);
}

static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt)
{
	return test_and_set_bit(XPRT_CONNECTED, &xprt->state);
}

static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt)
{
	return test_and_clear_bit(XPRT_CONNECTED, &xprt->state);
}

static inline void xprt_clear_connecting(struct rpc_xprt *xprt)
{
	smp_mb__before_clear_bit();
	clear_bit(XPRT_CONNECTING, &xprt->state);
	smp_mb__after_clear_bit();
}

static inline int xprt_connecting(struct rpc_xprt *xprt)
{
	return test_bit(XPRT_CONNECTING, &xprt->state);
}

static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt)
{
	return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
}

static inline void xprt_set_bound(struct rpc_xprt *xprt)
{
	test_and_set_bit(XPRT_BOUND, &xprt->state);
}

static inline int xprt_bound(struct rpc_xprt *xprt)
{
	return test_bit(XPRT_BOUND, &xprt->state);
}

static inline void xprt_clear_bound(struct rpc_xprt *xprt)
{
	clear_bit(XPRT_BOUND, &xprt->state);
}

static inline void xprt_clear_binding(struct rpc_xprt *xprt)
{
	smp_mb__before_clear_bit();
	clear_bit(XPRT_BINDING, &xprt->state);
	smp_mb__after_clear_bit();
}

static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
{
	return test_and_set_bit(XPRT_BINDING, &xprt->state);
}

#endif /* __KERNEL__*/

#endif /* _LINUX_SUNRPC_XPRT_H */
Commit	Line	Data
	1	/*
	2	* linux/include/linux/sunrpc/xprt.h
	3	*
	4	* Declarations for the RPC transport interface.
	5	*
	6	* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#ifndef _LINUX_SUNRPC_XPRT_H
	10	#define _LINUX_SUNRPC_XPRT_H
	11
	12	#include <linux/uio.h>
	13	#include <linux/socket.h>
	14	#include <linux/in.h>
	15	#include <linux/kref.h>
	16	#include <linux/sunrpc/sched.h>
	17	#include <linux/sunrpc/xdr.h>
	18	#include <linux/sunrpc/msg_prot.h>
	19
	20	#ifdef __KERNEL__
	21
	22	#define RPC_MIN_SLOT_TABLE (2U)
	23	#define RPC_DEF_SLOT_TABLE (16U)
	24	#define RPC_MAX_SLOT_TABLE (128U)
	25
	26	/*
	27	* This describes a timeout strategy
	28	*/
	29	struct rpc_timeout {
	30	unsigned long to_initval, /* initial timeout */
	31	to_maxval, /* max timeout */
	32	to_increment; /* if !exponential */
	33	unsigned int to_retries; /* max # of retries */
	34	unsigned char to_exponential;
	35	};
	36
	37	enum rpc_display_format_t {
	38	RPC_DISPLAY_ADDR = 0,
	39	RPC_DISPLAY_PORT,
	40	RPC_DISPLAY_PROTO,
	41	RPC_DISPLAY_ALL,
	42	RPC_DISPLAY_HEX_ADDR,
	43	RPC_DISPLAY_HEX_PORT,
	44	RPC_DISPLAY_UNIVERSAL_ADDR,
	45	RPC_DISPLAY_NETID,
	46	RPC_DISPLAY_MAX,
	47	};
	48
	49	struct rpc_task;
	50	struct rpc_xprt;
	51	struct seq_file;
	52
	53	/*
	54	* This describes a complete RPC request
	55	*/
	56	struct rpc_rqst {
	57	/*
	58	* This is the user-visible part
	59	*/
	60	struct rpc_xprt * rq_xprt; /* RPC client */
	61	struct xdr_buf rq_snd_buf; /* send buffer */
	62	struct xdr_buf rq_rcv_buf; /* recv buffer */
	63
	64	/*
	65	* This is the private part
	66	*/
	67	struct rpc_task * rq_task; /* RPC task data */
	68	__be32 rq_xid; /* request XID */
	69	int rq_cong; /* has incremented xprt->cong */
	70	int rq_received; /* receive completed */
	71	u32 rq_seqno; /* gss seq no. used on req. */
	72	int rq_enc_pages_num;
	73	struct page *rq_enc_pages; / scratch pages for use by
	74	gss privacy code */
	75	void (rq_release_snd_buf)(struct rpc_rqst ); /* release rq_enc_pages */
	76	struct list_head rq_list;
	77
	78	__u32 * rq_buffer; /* XDR encode buffer */
	79	size_t rq_bufsize,
	80	rq_callsize,
	81	rq_rcvsize;
	82
	83	struct xdr_buf rq_private_buf; /* The receive buffer
	84	* used in the softirq.
	85	*/
	86	unsigned long rq_majortimeo; /* major timeout alarm */
	87	unsigned long rq_timeout; /* Current timeout value */
	88	unsigned int rq_retries; /* # of retries */
	89
	90	/*
	91	* Partial send handling
	92	*/
	93	u32 rq_bytes_sent; /* Bytes we have sent */
	94
	95	unsigned long rq_xtime; /* when transmitted */
	96	int rq_ntrans;
	97	};
	98	#define rq_svec rq_snd_buf.head
	99	#define rq_slen rq_snd_buf.len
	100
	101	struct rpc_xprt_ops {
	102	void (set_buffer_size)(struct rpc_xprt xprt, size_t sndsize, size_t rcvsize);
	103	int (reserve_xprt)(struct rpc_task task);
	104	void (release_xprt)(struct rpc_xprt xprt, struct rpc_task *task);
	105	void (rpcbind)(struct rpc_task task);
	106	void (set_port)(struct rpc_xprt xprt, unsigned short port);
	107	void (connect)(struct rpc_task task);
	108	void * (buf_alloc)(struct rpc_task task, size_t size);
	109	void (buf_free)(void buffer);
	110	int (send_request)(struct rpc_task task);
	111	void (set_retrans_timeout)(struct rpc_task task);
	112	void (timer)(struct rpc_task task);
	113	void (release_request)(struct rpc_task task);
	114	void (close)(struct rpc_xprt xprt);
	115	void (destroy)(struct rpc_xprt xprt);
	116	void (print_stats)(struct rpc_xprt xprt, struct seq_file *seq);
	117	};
	118
	119	struct rpc_xprt {
	120	struct kref kref; /* Reference count */
	121	struct rpc_xprt_ops * ops; /* transport methods */
	122
	123	struct rpc_timeout timeout; /* timeout parms */
	124	struct sockaddr_storage addr; /* server address */
	125	size_t addrlen; /* size of server address */
	126	int prot; /* IP protocol */
	127
	128	unsigned long cong; /* current congestion */
	129	unsigned long cwnd; /* congestion window */
	130
	131	size_t max_payload; /* largest RPC payload size,
	132	in bytes */
	133	unsigned int tsh_size; /* size of transport specific
	134	header */
	135
	136	struct rpc_wait_queue binding; /* requests waiting on rpcbind */
	137	struct rpc_wait_queue sending; /* requests waiting to send */
	138	struct rpc_wait_queue resend; /* requests waiting to resend */
	139	struct rpc_wait_queue pending; /* requests in flight */
	140	struct rpc_wait_queue backlog; /* waiting for slot */
	141	struct list_head free; /* free slots */
	142	struct rpc_rqst * slot; /* slot table storage */
	143	unsigned int max_reqs; /* total slots */
	144	unsigned long state; /* transport state */
	145	unsigned char shutdown : 1, /* being shut down */
	146	resvport : 1; /* use a reserved port */
	147	unsigned int bind_index; /* bind function index */
	148
	149	/*
	150	* Connection of transports
	151	*/
	152	unsigned long connect_timeout,
	153	bind_timeout,
	154	reestablish_timeout;
	155
	156	/*
	157	* Disconnection of idle transports
	158	*/
	159	struct work_struct task_cleanup;
	160	struct timer_list timer;
	161	unsigned long last_used,
	162	idle_timeout;
	163
	164	/*
	165	* Send stuff
	166	*/
	167	spinlock_t transport_lock; /* lock transport info */
	168	spinlock_t reserve_lock; /* lock slot table */
	169	u32 xid; /* Next XID value to use */
	170	struct rpc_task * snd_task; /* Task blocked in send */
	171	struct list_head recv;
	172
	173	struct {
	174	unsigned long bind_count, /* total number of binds */
	175	connect_count, /* total number of connects */
	176	connect_start, /* connect start timestamp */
	177	connect_time, /* jiffies waiting for connect */
	178	sends, /* how many complete requests */
	179	recvs, /* how many complete requests */
	180	bad_xids; /* lookup_rqst didn't find XID */
	181
	182	unsigned long long req_u, /* average requests on the wire */
	183	bklog_u; /* backlog queue utilization */
	184	} stat;
	185
	186	char * address_strings[RPC_DISPLAY_MAX];
	187	};
	188
	189	struct xprt_create {
	190	int ident; /* XPRT_TRANSPORT identifier */
	191	struct sockaddr * srcaddr; /* optional local address */
	192	struct sockaddr * dstaddr; /* remote peer address */
	193	size_t addrlen;
	194	struct rpc_timeout * timeout; /* optional timeout parameters */
	195	};
	196
	197	struct xprt_class {
	198	struct list_head list;
	199	int ident; /* XPRT_TRANSPORT identifier */
	200	struct rpc_xprt * (setup)(struct xprt_create );
	201	struct module *owner;
	202	char name[32];
	203	};
	204
	205	/*
	206	* Transport operations used by ULPs
	207	*/
	208	void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr);
	209
	210	/*
	211	* Generic internal transport functions
	212	*/
	213	struct rpc_xprt xprt_create_transport(struct xprt_create args);
	214	void xprt_connect(struct rpc_task *task);
	215	void xprt_reserve(struct rpc_task *task);
	216	int xprt_reserve_xprt(struct rpc_task *task);
	217	int xprt_reserve_xprt_cong(struct rpc_task *task);
	218	int xprt_prepare_transmit(struct rpc_task *task);
	219	void xprt_transmit(struct rpc_task *task);
	220	void xprt_end_transmit(struct rpc_task *task);
	221	int xprt_adjust_timeout(struct rpc_rqst *req);
	222	void xprt_release_xprt(struct rpc_xprt xprt, struct rpc_task task);
	223	void xprt_release_xprt_cong(struct rpc_xprt xprt, struct rpc_task task);
	224	void xprt_release(struct rpc_task *task);
	225	struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
	226	void xprt_put(struct rpc_xprt *xprt);
	227
	228	static inline __be32 xprt_skip_transport_header(struct rpc_xprt xprt, __be32 *p)
	229	{
	230	return p + xprt->tsh_size;
	231	}
	232
	233	/*
	234	* Transport switch helper functions
	235	*/
	236	int xprt_register_transport(struct xprt_class *type);
	237	int xprt_unregister_transport(struct xprt_class *type);
	238	void xprt_set_retrans_timeout_def(struct rpc_task *task);
	239	void xprt_set_retrans_timeout_rtt(struct rpc_task *task);
	240	void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
	241	void xprt_wait_for_buffer_space(struct rpc_task *task);
	242	void xprt_write_space(struct rpc_xprt *xprt);
	243	void xprt_update_rtt(struct rpc_task *task);
	244	void xprt_adjust_cwnd(struct rpc_task *task, int result);
	245	struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
	246	void xprt_complete_rqst(struct rpc_task *task, int copied);
	247	void xprt_release_rqst_cong(struct rpc_task *task);
	248	void xprt_disconnect(struct rpc_xprt *xprt);
	249	void xprt_force_disconnect(struct rpc_xprt *xprt);
	250
	251	/*
	252	* Reserved bit positions in xprt->state
	253	*/
	254	#define XPRT_LOCKED (0)
	255	#define XPRT_CONNECTED (1)
	256	#define XPRT_CONNECTING (2)
	257	#define XPRT_CLOSE_WAIT (3)
	258	#define XPRT_BOUND (4)
	259	#define XPRT_BINDING (5)
	260	#define XPRT_CLOSING (6)
	261
	262	static inline void xprt_set_connected(struct rpc_xprt *xprt)
	263	{
	264	set_bit(XPRT_CONNECTED, &xprt->state);
	265	}
	266
	267	static inline void xprt_clear_connected(struct rpc_xprt *xprt)
	268	{
	269	clear_bit(XPRT_CONNECTED, &xprt->state);
	270	}
	271
	272	static inline int xprt_connected(struct rpc_xprt *xprt)
	273	{
	274	return test_bit(XPRT_CONNECTED, &xprt->state);
	275	}
	276
	277	static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt)
	278	{
	279	return test_and_set_bit(XPRT_CONNECTED, &xprt->state);
	280	}
	281
	282	static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt)
	283	{
	284	return test_and_clear_bit(XPRT_CONNECTED, &xprt->state);
	285	}
	286
	287	static inline void xprt_clear_connecting(struct rpc_xprt *xprt)
	288	{
	289	smp_mb__before_clear_bit();
	290	clear_bit(XPRT_CONNECTING, &xprt->state);
	291	smp_mb__after_clear_bit();
	292	}
	293
	294	static inline int xprt_connecting(struct rpc_xprt *xprt)
	295	{
	296	return test_bit(XPRT_CONNECTING, &xprt->state);
	297	}
	298
	299	static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt)
	300	{
	301	return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
	302	}
	303
	304	static inline void xprt_set_bound(struct rpc_xprt *xprt)
	305	{
	306	test_and_set_bit(XPRT_BOUND, &xprt->state);
	307	}
	308
	309	static inline int xprt_bound(struct rpc_xprt *xprt)
	310	{
	311	return test_bit(XPRT_BOUND, &xprt->state);
	312	}
	313
	314	static inline void xprt_clear_bound(struct rpc_xprt *xprt)
	315	{
	316	clear_bit(XPRT_BOUND, &xprt->state);
	317	}
	318
	319	static inline void xprt_clear_binding(struct rpc_xprt *xprt)
	320	{
	321	smp_mb__before_clear_bit();
	322	clear_bit(XPRT_BINDING, &xprt->state);
	323	smp_mb__after_clear_bit();
	324	}
	325
	326	static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
	327	{
	328	return test_and_set_bit(XPRT_BINDING, &xprt->state);
	329	}
	330
	331	#endif /* __KERNEL__*/
	332
	333	#endif /* _LINUX_SUNRPC_XPRT_H */