[deliverable/linux.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>

extern unsigned int xprt_udp_slot_table_entries;
extern unsigned int xprt_tcp_slot_table_entries;

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

/*
 * Parameters for choosing a free port
 */
extern unsigned int xprt_min_resvport;
extern unsigned int xprt_max_resvport;

#define RPC_MIN_RESVPORT	(1U)
#define RPC_MAX_RESVPORT	(65535U)
#define RPC_DEF_MIN_RESVPORT	(665U)
#define RPC_DEF_MAX_RESVPORT	(1023U)

/*
 * 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_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;

	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);
	char *		(*print_addr)(struct rpc_xprt *xprt, enum rpc_display_format_t format);
	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)(struct rpc_task *task);
	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 socket *		sock;		/* BSD socket layer */
	struct sock *		inet;		/* INET layer */

	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			rcvsize,	/* transport rcv buffer size */
				sndsize;	/* transport send buffer size */

	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 */

	/*
	 * XID
	 */
	__u32			xid;		/* Next XID value to use */

	/*
	 * State of TCP reply receive stuff
	 */
	__be32			tcp_recm,	/* Fragment header */
				tcp_xid;	/* Current XID */
	u32			tcp_reclen,	/* fragment length */
				tcp_offset;	/* fragment offset */
	unsigned long		tcp_copied,	/* copied to request */
				tcp_flags;
	/*
	 * Connection of transports
	 */
	unsigned long		connect_timeout,
				bind_timeout,
				reestablish_timeout;
	struct delayed_work	connect_worker;
	unsigned short		port;

	/*
	 * 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 */
	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;

	void			(*old_data_ready)(struct sock *, int);
	void			(*old_state_change)(struct sock *);
	void			(*old_write_space)(struct sock *);

	char *			address_strings[RPC_DISPLAY_MAX];
};

#define XPRT_LAST_FRAG		(1 << 0)
#define XPRT_COPY_RECM		(1 << 1)
#define XPRT_COPY_XID		(1 << 2)
#define XPRT_COPY_DATA		(1 << 3)

#ifdef __KERNEL__

/*
 * 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(int proto, struct sockaddr *addr, size_t size, struct rpc_timeout *toparms);
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
 */
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);

/*
 * Socket transport setup operations
 */
int			xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to);
int			xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to);

/*
 * 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)

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
1da177e4	1	/*
55aa4f58	2	* linux/include/linux/sunrpc/xprt.h
1da177e4 LT	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>
6b6ca86b	15	#include <linux/kref.h>
1da177e4 LT	16	#include <linux/sunrpc/sched.h>
1da177e4 LT	17	#include <linux/sunrpc/xdr.h>
7adae489	18	#include <linux/sunrpc/msg_prot.h>
1da177e4	19
1da177e4 LT	20	extern unsigned int xprt_udp_slot_table_entries;
	21	extern unsigned int xprt_tcp_slot_table_entries;
	22
	23	#define RPC_MIN_SLOT_TABLE (2U)
	24	#define RPC_DEF_SLOT_TABLE (16U)
	25	#define RPC_MAX_SLOT_TABLE (128U)
	26
529b33c6 CL	27	/*
	28	* Parameters for choosing a free port
	29	*/
	30	extern unsigned int xprt_min_resvport;
	31	extern unsigned int xprt_max_resvport;
	32
	33	#define RPC_MIN_RESVPORT (1U)
	34	#define RPC_MAX_RESVPORT (65535U)
8e037094	35	#define RPC_DEF_MIN_RESVPORT (665U)
529b33c6 CL	36	#define RPC_DEF_MAX_RESVPORT (1023U)
529b33c6 CL	37
1da177e4 LT	38	/*
	39	* This describes a timeout strategy
	40	*/
	41	struct rpc_timeout {
	42	unsigned long to_initval, /* initial timeout */
	43	to_maxval, /* max timeout */
	44	to_increment; /* if !exponential */
	45	unsigned int to_retries; /* max # of retries */
	46	unsigned char to_exponential;
	47	};
	48
edb267a6 CL	49	enum rpc_display_format_t {
	50	RPC_DISPLAY_ADDR = 0,
	51	RPC_DISPLAY_PORT,
	52	RPC_DISPLAY_PROTO,
	53	RPC_DISPLAY_ALL,
	54	RPC_DISPLAY_MAX,
	55	};
	56
529b33c6 CL	57	struct rpc_task;
529b33c6 CL	58	struct rpc_xprt;
e99170ff	59	struct seq_file;
529b33c6	60
1da177e4 LT	61	/*
	62	* This describes a complete RPC request
	63	*/
	64	struct rpc_rqst {
	65	/*
	66	* This is the user-visible part
	67	*/
	68	struct rpc_xprt * rq_xprt; /* RPC client */
	69	struct xdr_buf rq_snd_buf; /* send buffer */
	70	struct xdr_buf rq_rcv_buf; /* recv buffer */
	71
	72	/*
	73	* This is the private part
	74	*/
	75	struct rpc_task * rq_task; /* RPC task data */
d8ed029d	76	__be32 rq_xid; /* request XID */
1da177e4 LT	77	int rq_cong; /* has incremented xprt->cong */
	78	int rq_received; /* receive completed */
	79	u32 rq_seqno; /* gss seq no. used on req. */
ead5e1c2 BF	80	int rq_enc_pages_num;
	81	struct page *rq_enc_pages; / scratch pages for use by
	82	gss privacy code */
	83	void (rq_release_snd_buf)(struct rpc_rqst ); /* release rq_enc_pages */
1da177e4 LT	84	struct list_head rq_list;
1da177e4 LT	85
02107148 CL	86	__u32 * rq_buffer; /* XDR encode buffer */
	87	size_t rq_bufsize;
	88
1da177e4 LT	89	struct xdr_buf rq_private_buf; /* The receive buffer
	90	* used in the softirq.
	91	*/
	92	unsigned long rq_majortimeo; /* major timeout alarm */
	93	unsigned long rq_timeout; /* Current timeout value */
	94	unsigned int rq_retries; /* # of retries */
1da177e4 LT	95
	96	/*
	97	* Partial send handling
	98	*/
1da177e4 LT	99	u32 rq_bytes_sent; /* Bytes we have sent */
	100
	101	unsigned long rq_xtime; /* when transmitted */
	102	int rq_ntrans;
	103	};
	104	#define rq_svec rq_snd_buf.head
	105	#define rq_slen rq_snd_buf.len
	106
a246b010	107	struct rpc_xprt_ops {
470056c2	108	void (set_buffer_size)(struct rpc_xprt xprt, size_t sndsize, size_t rcvsize);
edb267a6	109	char * (print_addr)(struct rpc_xprt xprt, enum rpc_display_format_t format);
12a80469	110	int (reserve_xprt)(struct rpc_task task);
49e9a890	111	void (release_xprt)(struct rpc_xprt xprt, struct rpc_task *task);
bbf7c1dd	112	void (rpcbind)(struct rpc_task task);
92200412	113	void (set_port)(struct rpc_xprt xprt, unsigned short port);
a246b010	114	void (connect)(struct rpc_task task);
02107148 CL	115	void * (buf_alloc)(struct rpc_task task, size_t size);
02107148 CL	116	void (buf_free)(struct rpc_task task);
a246b010	117	int (send_request)(struct rpc_task task);
fe3aca29	118	void (set_retrans_timeout)(struct rpc_task task);
46c0ee8b	119	void (timer)(struct rpc_task task);
a58dd398	120	void (release_request)(struct rpc_task task);
a246b010 CL	121	void (close)(struct rpc_xprt xprt);
a246b010 CL	122	void (destroy)(struct rpc_xprt xprt);
262ca07d	123	void (print_stats)(struct rpc_xprt xprt, struct seq_file *seq);
a246b010	124	};
1da177e4 LT	125
1da177e4 LT	126	struct rpc_xprt {
6b6ca86b	127	struct kref kref; /* Reference count */
a246b010	128	struct rpc_xprt_ops * ops; /* transport methods */
1da177e4 LT	129	struct socket * sock; /* BSD socket layer */
	130	struct sock * inet; /* INET layer */
	131
	132	struct rpc_timeout timeout; /* timeout parms */
c4efcb1d CL	133	struct sockaddr_storage addr; /* server address */
c4efcb1d CL	134	size_t addrlen; /* size of server address */
1da177e4 LT	135	int prot; /* IP protocol */
	136
	137	unsigned long cong; /* current congestion */
	138	unsigned long cwnd; /* congestion window */
	139
470056c2	140	size_t rcvsize, /* transport rcv buffer size */
55aa4f58	141	sndsize; /* transport send buffer size */
1da177e4 LT	142
	143	size_t max_payload; /* largest RPC payload size,
	144	in bytes */
808012fb CL	145	unsigned int tsh_size; /* size of transport specific
808012fb CL	146	header */
1da177e4	147
4a68179d	148	struct rpc_wait_queue binding; /* requests waiting on rpcbind */
1da177e4 LT	149	struct rpc_wait_queue sending; /* requests waiting to send */
	150	struct rpc_wait_queue resend; /* requests waiting to resend */
	151	struct rpc_wait_queue pending; /* requests in flight */
	152	struct rpc_wait_queue backlog; /* waiting for slot */
	153	struct list_head free; /* free slots */
	154	struct rpc_rqst * slot; /* slot table storage */
	155	unsigned int max_reqs; /* total slots */
2226feb6	156	unsigned long state; /* transport state */
1da177e4	157	unsigned char shutdown : 1, /* being shut down */
43118c29	158	resvport : 1; /* use a reserved port */
1da177e4 LT	159
	160	/*
	161	* XID
	162	*/
	163	__u32 xid; /* Next XID value to use */
	164
	165	/*
	166	* State of TCP reply receive stuff
	167	*/
d8ed029d AD	168	__be32 tcp_recm, /* Fragment header */
	169	tcp_xid; /* Current XID */
	170	u32 tcp_reclen, /* fragment length */
1da177e4 LT	171	tcp_offset; /* fragment offset */
	172	unsigned long tcp_copied, /* copied to request */
	173	tcp_flags;
	174	/*
55aa4f58	175	* Connection of transports
1da177e4	176	*/
03bf4b70 CL	177	unsigned long connect_timeout,
	178	bind_timeout,
	179	reestablish_timeout;
52bad64d	180	struct delayed_work connect_worker;
1da177e4	181	unsigned short port;
03bf4b70	182
1da177e4	183	/*
55aa4f58	184	* Disconnection of idle transports
1da177e4 LT	185	*/
	186	struct work_struct task_cleanup;
	187	struct timer_list timer;
03bf4b70 CL	188	unsigned long last_used,
03bf4b70 CL	189	idle_timeout;
1da177e4 LT	190
	191	/*
	192	* Send stuff
	193	*/
4a0f8c04	194	spinlock_t transport_lock; /* lock transport info */
5dc07727	195	spinlock_t reserve_lock; /* lock slot table */
1da177e4 LT	196	struct rpc_task * snd_task; /* Task blocked in send */
	197
	198	struct list_head recv;
	199
262ca07d CL	200	struct {
	201	unsigned long bind_count, /* total number of binds */
	202	connect_count, /* total number of connects */
	203	connect_start, /* connect start timestamp */
	204	connect_time, /* jiffies waiting for connect */
	205	sends, /* how many complete requests */
	206	recvs, /* how many complete requests */
	207	bad_xids; /* lookup_rqst didn't find XID */
	208
	209	unsigned long long req_u, /* average requests on the wire */
	210	bklog_u; /* backlog queue utilization */
	211	} stat;
1da177e4 LT	212
	213	void (old_data_ready)(struct sock , int);
	214	void (old_state_change)(struct sock );
	215	void (old_write_space)(struct sock );
edb267a6 CL	216
edb267a6 CL	217	char * address_strings[RPC_DISPLAY_MAX];
1da177e4 LT	218	};
1da177e4 LT	219
a246b010 CL	220	#define XPRT_LAST_FRAG (1 << 0)
	221	#define XPRT_COPY_RECM (1 << 1)
	222	#define XPRT_COPY_XID (1 << 2)
	223	#define XPRT_COPY_DATA (1 << 3)
	224
1da177e4 LT	225	#ifdef __KERNEL__
1da177e4 LT	226
55aa4f58 CL	227	/*
	228	* Transport operations used by ULPs
	229	*/
55aa4f58 CL	230	void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr);
	231
	232	/*
	233	* Generic internal transport functions
	234	*/
c2866763	235	struct rpc_xprt * xprt_create_transport(int proto, struct sockaddr addr, size_t size, struct rpc_timeout toparms);
55aa4f58 CL	236	void xprt_connect(struct rpc_task *task);
55aa4f58 CL	237	void xprt_reserve(struct rpc_task *task);
12a80469 CL	238	int xprt_reserve_xprt(struct rpc_task *task);
12a80469 CL	239	int xprt_reserve_xprt_cong(struct rpc_task *task);
55aa4f58 CL	240	int xprt_prepare_transmit(struct rpc_task *task);
55aa4f58 CL	241	void xprt_transmit(struct rpc_task *task);
e0ab53de	242	void xprt_end_transmit(struct rpc_task *task);
1da177e4	243	int xprt_adjust_timeout(struct rpc_rqst *req);
49e9a890 CL	244	void xprt_release_xprt(struct rpc_xprt xprt, struct rpc_task task);
49e9a890 CL	245	void xprt_release_xprt_cong(struct rpc_xprt xprt, struct rpc_task task);
55aa4f58	246	void xprt_release(struct rpc_task *task);
6b6ca86b TM	247	struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
6b6ca86b TM	248	void xprt_put(struct rpc_xprt *xprt);
55aa4f58	249
d8ed029d	250	static inline __be32 xprt_skip_transport_header(struct rpc_xprt xprt, __be32 *p)
808012fb CL	251	{
	252	return p + xprt->tsh_size;
	253	}
	254
55aa4f58 CL	255	/*
	256	* Transport switch helper functions
	257	*/
fe3aca29 CL	258	void xprt_set_retrans_timeout_def(struct rpc_task *task);
fe3aca29 CL	259	void xprt_set_retrans_timeout_rtt(struct rpc_task *task);
55aa4f58	260	void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
c7b2cae8 CL	261	void xprt_wait_for_buffer_space(struct rpc_task *task);
c7b2cae8 CL	262	void xprt_write_space(struct rpc_xprt *xprt);
1570c1e4	263	void xprt_update_rtt(struct rpc_task *task);
46c0ee8b	264	void xprt_adjust_cwnd(struct rpc_task *task, int result);
d8ed029d	265	struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
1570c1e4	266	void xprt_complete_rqst(struct rpc_task *task, int copied);
a58dd398	267	void xprt_release_rqst_cong(struct rpc_task *task);
55aa4f58 CL	268	void xprt_disconnect(struct rpc_xprt *xprt);
	269
	270	/*
	271	* Socket transport setup operations
	272	*/
	273	int xs_setup_udp(struct rpc_xprt xprt, struct rpc_timeout to);
	274	int xs_setup_tcp(struct rpc_xprt xprt, struct rpc_timeout to);
1da177e4	275
2226feb6 CL	276	/*
	277	* Reserved bit positions in xprt->state
	278	*/
	279	#define XPRT_LOCKED (0)
	280	#define XPRT_CONNECTED (1)
	281	#define XPRT_CONNECTING (2)
632e3bdc	282	#define XPRT_CLOSE_WAIT (3)
ec739ef0	283	#define XPRT_BOUND (4)
4a68179d	284	#define XPRT_BINDING (5)
2226feb6 CL	285
	286	static inline void xprt_set_connected(struct rpc_xprt *xprt)
	287	{
	288	set_bit(XPRT_CONNECTED, &xprt->state);
	289	}
	290
	291	static inline void xprt_clear_connected(struct rpc_xprt *xprt)
	292	{
	293	clear_bit(XPRT_CONNECTED, &xprt->state);
	294	}
	295
	296	static inline int xprt_connected(struct rpc_xprt *xprt)
	297	{
	298	return test_bit(XPRT_CONNECTED, &xprt->state);
	299	}
	300
	301	static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt)
	302	{
	303	return test_and_set_bit(XPRT_CONNECTED, &xprt->state);
	304	}
	305
	306	static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt)
	307	{
	308	return test_and_clear_bit(XPRT_CONNECTED, &xprt->state);
	309	}
	310
	311	static inline void xprt_clear_connecting(struct rpc_xprt *xprt)
	312	{
	313	smp_mb__before_clear_bit();
	314	clear_bit(XPRT_CONNECTING, &xprt->state);
	315	smp_mb__after_clear_bit();
	316	}
	317
	318	static inline int xprt_connecting(struct rpc_xprt *xprt)
	319	{
	320	return test_bit(XPRT_CONNECTING, &xprt->state);
	321	}
	322
	323	static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt)
	324	{
	325	return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
	326	}
1da177e4	327
ec739ef0 CL	328	static inline void xprt_set_bound(struct rpc_xprt *xprt)
	329	{
	330	test_and_set_bit(XPRT_BOUND, &xprt->state);
	331	}
	332
	333	static inline int xprt_bound(struct rpc_xprt *xprt)
	334	{
	335	return test_bit(XPRT_BOUND, &xprt->state);
	336	}
	337
	338	static inline void xprt_clear_bound(struct rpc_xprt *xprt)
	339	{
	340	clear_bit(XPRT_BOUND, &xprt->state);
	341	}
	342
4a68179d CL	343	static inline void xprt_clear_binding(struct rpc_xprt *xprt)
	344	{
	345	smp_mb__before_clear_bit();
	346	clear_bit(XPRT_BINDING, &xprt->state);
	347	smp_mb__after_clear_bit();
	348	}
	349
	350	static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
	351	{
	352	return test_and_set_bit(XPRT_BINDING, &xprt->state);
	353	}
	354
1da177e4 LT	355	#endif /* __KERNEL__*/
	356
	357	#endif /* _LINUX_SUNRPC_XPRT_H */