[mirror_ubuntu-hirsute-kernel.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_HEX_ADDR,
	RPC_DISPLAY_HEX_PORT,
	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_reply_bytes_recvd;	/* number of reply */
							/* bytes received */
	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_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 */
	unsigned int		rq_connect_cookie;
						/* A cookie used to track the
						   state of the transport
						   connection */
	
	/*
	 * Partial send handling
	 */
	u32			rq_bytes_sent;	/* Bytes we have sent */

	unsigned long		rq_xtime;	/* when transmitted */
	int			rq_ntrans;

#if defined(CONFIG_NFS_V4_1)
	struct list_head	rq_bc_list;	/* Callback service list */
	unsigned long		rq_bc_pa_state;	/* Backchannel prealloc state */
	struct list_head	rq_bc_pa_list;	/* Backchannel prealloc list */
#endif /* CONFIG_NFS_V4_1 */
};
#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 */

	const 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;
	unsigned int		connect_cookie;	/* A cookie that gets bumped
						   every time the transport
						   is reconnected */

	/*
	 * 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 */
#if defined(CONFIG_NFS_V4_1)
	struct svc_serv		*bc_serv;       /* The RPC service which will */
						/* process the callback */
	unsigned int		bc_alloc_count;	/* Total number of preallocs */
	spinlock_t		bc_pa_lock;	/* Protects the preallocated
						 * items */
	struct list_head	bc_pa_list;	/* List of preallocated
						 * backchannel rpc_rqst's */
#endif /* CONFIG_NFS_V4_1 */
	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;

	const char		*address_strings[RPC_DISPLAY_MAX];
};

#if defined(CONFIG_NFS_V4_1)
/*
 * Backchannel flags
 */
#define	RPC_BC_PA_IN_USE	0x0001		/* Preallocated backchannel */
						/* buffer in use */
#endif /* CONFIG_NFS_V4_1 */

#if defined(CONFIG_NFS_V4_1)
static inline int bc_prealloc(struct rpc_rqst *req)
{
	return test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state);
}
#else
static inline int bc_prealloc(struct rpc_rqst *req)
{
	return 0;
}
#endif /* CONFIG_NFS_V4_1 */

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

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];
};

/*
 * 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);
int			xprt_load_transport(const char *);
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, rpc_action action);
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_done(struct rpc_xprt *xprt);
void			xprt_force_disconnect(struct rpc_xprt *xprt);
void			xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie);

/*
 * 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)
#define XPRT_CONNECTION_ABORT	(7)
#define XPRT_CONNECTION_CLOSE	(8)

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
96802a09 FM	20	#ifdef __KERNEL__
96802a09 FM	21
1da177e4 LT	22	#define RPC_MIN_SLOT_TABLE (2U)
	23	#define RPC_DEF_SLOT_TABLE (16U)
	24	#define RPC_MAX_SLOT_TABLE (128U)
	25
1da177e4 LT	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
edb267a6 CL	37	enum rpc_display_format_t {
	38	RPC_DISPLAY_ADDR = 0,
	39	RPC_DISPLAY_PORT,
	40	RPC_DISPLAY_PROTO,
fbfe3cc6 CL	41	RPC_DISPLAY_HEX_ADDR,
fbfe3cc6 CL	42	RPC_DISPLAY_HEX_PORT,
4417c8c4	43	RPC_DISPLAY_NETID,
edb267a6 CL	44	RPC_DISPLAY_MAX,
	45	};
	46
529b33c6 CL	47	struct rpc_task;
529b33c6 CL	48	struct rpc_xprt;
e99170ff	49	struct seq_file;
529b33c6	50
1da177e4 LT	51	/*
	52	* This describes a complete RPC request
	53	*/
	54	struct rpc_rqst {
	55	/*
	56	* This is the user-visible part
	57	*/
	58	struct rpc_xprt * rq_xprt; /* RPC client */
	59	struct xdr_buf rq_snd_buf; /* send buffer */
	60	struct xdr_buf rq_rcv_buf; /* recv buffer */
	61
	62	/*
	63	* This is the private part
	64	*/
	65	struct rpc_task * rq_task; /* RPC task data */
d8ed029d	66	__be32 rq_xid; /* request XID */
1da177e4	67	int rq_cong; /* has incremented xprt->cong */
dd2b63d0 RL	68	int rq_reply_bytes_recvd; /* number of reply */
dd2b63d0 RL	69	/* bytes received */
1da177e4	70	u32 rq_seqno; /* gss seq no. used on req. */
ead5e1c2 BF	71	int rq_enc_pages_num;
	72	struct page *rq_enc_pages; / scratch pages for use by
	73	gss privacy code */
	74	void (rq_release_snd_buf)(struct rpc_rqst ); /* release rq_enc_pages */
1da177e4 LT	75	struct list_head rq_list;
1da177e4 LT	76
02107148	77	__u32 * rq_buffer; /* XDR encode buffer */
c977a2ef	78	size_t rq_callsize,
2bea90d4	79	rq_rcvsize;
02107148	80
1da177e4 LT	81	struct xdr_buf rq_private_buf; /* The receive buffer
	82	* used in the softirq.
	83	*/
	84	unsigned long rq_majortimeo; /* major timeout alarm */
	85	unsigned long rq_timeout; /* Current timeout value */
	86	unsigned int rq_retries; /* # of retries */
7c1d71cf TM	87	unsigned int rq_connect_cookie;
	88	/* A cookie used to track the
	89	state of the transport
	90	connection */
1da177e4 LT	91
	92	/*
	93	* Partial send handling
	94	*/
1da177e4 LT	95	u32 rq_bytes_sent; /* Bytes we have sent */
	96
	97	unsigned long rq_xtime; /* when transmitted */
	98	int rq_ntrans;
56632b5b RL	99
	100	#if defined(CONFIG_NFS_V4_1)
	101	struct list_head rq_bc_list; /* Callback service list */
	102	unsigned long rq_bc_pa_state; /* Backchannel prealloc state */
	103	struct list_head rq_bc_pa_list; /* Backchannel prealloc list */
	104	#endif /* CONFIG_NFS_V4_1 */
1da177e4 LT	105	};
	106	#define rq_svec rq_snd_buf.head
	107	#define rq_slen rq_snd_buf.len
	108
a246b010	109	struct rpc_xprt_ops {
470056c2	110	void (set_buffer_size)(struct rpc_xprt xprt, size_t sndsize, size_t rcvsize);
12a80469	111	int (reserve_xprt)(struct rpc_task task);
49e9a890	112	void (release_xprt)(struct rpc_xprt xprt, struct rpc_task *task);
bbf7c1dd	113	void (rpcbind)(struct rpc_task task);
92200412	114	void (set_port)(struct rpc_xprt xprt, unsigned short port);
a246b010	115	void (connect)(struct rpc_task task);
02107148	116	void * (buf_alloc)(struct rpc_task task, size_t size);
c5a4dd8b	117	void (buf_free)(void buffer);
a246b010	118	int (send_request)(struct rpc_task task);
fe3aca29	119	void (set_retrans_timeout)(struct rpc_task task);
46c0ee8b	120	void (timer)(struct rpc_task task);
a58dd398	121	void (release_request)(struct rpc_task task);
a246b010 CL	122	void (close)(struct rpc_xprt xprt);
a246b010 CL	123	void (destroy)(struct rpc_xprt xprt);
262ca07d	124	void (print_stats)(struct rpc_xprt xprt, struct seq_file *seq);
a246b010	125	};
1da177e4 LT	126
1da177e4 LT	127	struct rpc_xprt {
6b6ca86b	128	struct kref kref; /* Reference count */
a246b010	129	struct rpc_xprt_ops * ops; /* transport methods */
1da177e4	130
ba7392bb	131	const struct rpc_timeout timeout; / timeout parms */
c4efcb1d CL	132	struct sockaddr_storage addr; /* server address */
c4efcb1d CL	133	size_t addrlen; /* size of server address */
1da177e4 LT	134	int prot; /* IP protocol */
	135
	136	unsigned long cong; /* current congestion */
	137	unsigned long cwnd; /* congestion window */
	138
1da177e4 LT	139	size_t max_payload; /* largest RPC payload size,
1da177e4 LT	140	in bytes */
808012fb CL	141	unsigned int tsh_size; /* size of transport specific
808012fb CL	142	header */
1da177e4	143
4a68179d	144	struct rpc_wait_queue binding; /* requests waiting on rpcbind */
1da177e4 LT	145	struct rpc_wait_queue sending; /* requests waiting to send */
	146	struct rpc_wait_queue resend; /* requests waiting to resend */
	147	struct rpc_wait_queue pending; /* requests in flight */
	148	struct rpc_wait_queue backlog; /* waiting for slot */
	149	struct list_head free; /* free slots */
	150	struct rpc_rqst * slot; /* slot table storage */
	151	unsigned int max_reqs; /* total slots */
2226feb6	152	unsigned long state; /* transport state */
1da177e4	153	unsigned char shutdown : 1, /* being shut down */
43118c29	154	resvport : 1; /* use a reserved port */
a509050b	155	unsigned int bind_index; /* bind function index */
1da177e4	156
1da177e4	157	/*
55aa4f58	158	* Connection of transports
1da177e4	159	*/
03bf4b70 CL	160	unsigned long connect_timeout,
	161	bind_timeout,
	162	reestablish_timeout;
7c1d71cf TM	163	unsigned int connect_cookie; /* A cookie that gets bumped
	164	every time the transport
	165	is reconnected */
03bf4b70	166
1da177e4	167	/*
55aa4f58	168	* Disconnection of idle transports
1da177e4 LT	169	*/
	170	struct work_struct task_cleanup;
	171	struct timer_list timer;
03bf4b70 CL	172	unsigned long last_used,
03bf4b70 CL	173	idle_timeout;
1da177e4 LT	174
	175	/*
	176	* Send stuff
	177	*/
4a0f8c04	178	spinlock_t transport_lock; /* lock transport info */
5dc07727	179	spinlock_t reserve_lock; /* lock slot table */
e744cf2e	180	u32 xid; /* Next XID value to use */
1da177e4	181	struct rpc_task * snd_task; /* Task blocked in send */
56632b5b RL	182	#if defined(CONFIG_NFS_V4_1)
	183	struct svc_serv bc_serv; / The RPC service which will */
	184	/* process the callback */
fb7a0b9a	185	unsigned int bc_alloc_count; /* Total number of preallocs */
56632b5b RL	186	spinlock_t bc_pa_lock; /* Protects the preallocated
	187	* items */
	188	struct list_head bc_pa_list; /* List of preallocated
	189	* backchannel rpc_rqst's */
	190	#endif /* CONFIG_NFS_V4_1 */
1da177e4 LT	191	struct list_head recv;
1da177e4 LT	192
262ca07d CL	193	struct {
	194	unsigned long bind_count, /* total number of binds */
	195	connect_count, /* total number of connects */
	196	connect_start, /* connect start timestamp */
	197	connect_time, /* jiffies waiting for connect */
	198	sends, /* how many complete requests */
	199	recvs, /* how many complete requests */
	200	bad_xids; /* lookup_rqst didn't find XID */
	201
	202	unsigned long long req_u, /* average requests on the wire */
	203	bklog_u; /* backlog queue utilization */
	204	} stat;
1da177e4	205
b454ae90	206	const char *address_strings[RPC_DISPLAY_MAX];
1da177e4 LT	207	};
1da177e4 LT	208
56632b5b RL	209	#if defined(CONFIG_NFS_V4_1)
	210	/*
	211	* Backchannel flags
	212	*/
	213	#define RPC_BC_PA_IN_USE 0x0001 /* Preallocated backchannel */
	214	/* buffer in use */
	215	#endif /* CONFIG_NFS_V4_1 */
	216
55ae1aab RL	217	#if defined(CONFIG_NFS_V4_1)
	218	static inline int bc_prealloc(struct rpc_rqst *req)
	219	{
	220	return test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state);
	221	}
	222	#else
	223	static inline int bc_prealloc(struct rpc_rqst *req)
	224	{
	225	return 0;
	226	}
	227	#endif /* CONFIG_NFS_V4_1 */
	228
3c341b0b	229	struct xprt_create {
4fa016eb	230	int ident; /* XPRT_TRANSPORT identifier */
d3bc9a1d	231	struct sockaddr * srcaddr; /* optional local address */
96802a09 FM	232	struct sockaddr * dstaddr; /* remote peer address */
96802a09 FM	233	size_t addrlen;
96802a09	234	};
1da177e4	235
81c098af TT	236	struct xprt_class {
81c098af TT	237	struct list_head list;
4fa016eb	238	int ident; /* XPRT_TRANSPORT identifier */
3c341b0b	239	struct rpc_xprt * (setup)(struct xprt_create );
81c098af TT	240	struct module *owner;
	241	char name[32];
	242	};
	243
55aa4f58 CL	244	/*
	245	* Generic internal transport functions
	246	*/
3c341b0b	247	struct rpc_xprt xprt_create_transport(struct xprt_create args);
55aa4f58 CL	248	void xprt_connect(struct rpc_task *task);
55aa4f58 CL	249	void xprt_reserve(struct rpc_task *task);
12a80469 CL	250	int xprt_reserve_xprt(struct rpc_task *task);
12a80469 CL	251	int xprt_reserve_xprt_cong(struct rpc_task *task);
55aa4f58 CL	252	int xprt_prepare_transmit(struct rpc_task *task);
55aa4f58 CL	253	void xprt_transmit(struct rpc_task *task);
e0ab53de	254	void xprt_end_transmit(struct rpc_task *task);
1da177e4	255	int xprt_adjust_timeout(struct rpc_rqst *req);
49e9a890 CL	256	void xprt_release_xprt(struct rpc_xprt xprt, struct rpc_task task);
49e9a890 CL	257	void xprt_release_xprt_cong(struct rpc_xprt xprt, struct rpc_task task);
55aa4f58	258	void xprt_release(struct rpc_task *task);
6b6ca86b TM	259	struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
6b6ca86b TM	260	void xprt_put(struct rpc_xprt *xprt);
55aa4f58	261
d8ed029d	262	static inline __be32 xprt_skip_transport_header(struct rpc_xprt xprt, __be32 *p)
808012fb CL	263	{
	264	return p + xprt->tsh_size;
	265	}
	266
55aa4f58 CL	267	/*
	268	* Transport switch helper functions
	269	*/
81c098af TT	270	int xprt_register_transport(struct xprt_class *type);
81c098af TT	271	int xprt_unregister_transport(struct xprt_class *type);
441e3e24	272	int xprt_load_transport(const char *);
fe3aca29 CL	273	void xprt_set_retrans_timeout_def(struct rpc_task *task);
fe3aca29 CL	274	void xprt_set_retrans_timeout_rtt(struct rpc_task *task);
55aa4f58	275	void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
b6ddf64f	276	void xprt_wait_for_buffer_space(struct rpc_task *task, rpc_action action);
c7b2cae8	277	void xprt_write_space(struct rpc_xprt *xprt);
1570c1e4	278	void xprt_update_rtt(struct rpc_task *task);
46c0ee8b	279	void xprt_adjust_cwnd(struct rpc_task *task, int result);
d8ed029d	280	struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid);
1570c1e4	281	void xprt_complete_rqst(struct rpc_task *task, int copied);
a58dd398	282	void xprt_release_rqst_cong(struct rpc_task *task);
62da3b24	283	void xprt_disconnect_done(struct rpc_xprt *xprt);
66af1e55	284	void xprt_force_disconnect(struct rpc_xprt *xprt);
7c1d71cf	285	void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie);
55aa4f58	286
2226feb6 CL	287	/*
	288	* Reserved bit positions in xprt->state
	289	*/
	290	#define XPRT_LOCKED (0)
	291	#define XPRT_CONNECTED (1)
	292	#define XPRT_CONNECTING (2)
632e3bdc	293	#define XPRT_CLOSE_WAIT (3)
ec739ef0	294	#define XPRT_BOUND (4)
4a68179d	295	#define XPRT_BINDING (5)
3b948ae5	296	#define XPRT_CLOSING (6)
7d1e8255	297	#define XPRT_CONNECTION_ABORT (7)
f75e6745	298	#define XPRT_CONNECTION_CLOSE (8)
2226feb6 CL	299
	300	static inline void xprt_set_connected(struct rpc_xprt *xprt)
	301	{
	302	set_bit(XPRT_CONNECTED, &xprt->state);
	303	}
	304
	305	static inline void xprt_clear_connected(struct rpc_xprt *xprt)
	306	{
	307	clear_bit(XPRT_CONNECTED, &xprt->state);
	308	}
	309
	310	static inline int xprt_connected(struct rpc_xprt *xprt)
	311	{
	312	return test_bit(XPRT_CONNECTED, &xprt->state);
	313	}
	314
	315	static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt)
	316	{
	317	return test_and_set_bit(XPRT_CONNECTED, &xprt->state);
	318	}
	319
	320	static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt)
	321	{
	322	return test_and_clear_bit(XPRT_CONNECTED, &xprt->state);
	323	}
	324
	325	static inline void xprt_clear_connecting(struct rpc_xprt *xprt)
	326	{
	327	smp_mb__before_clear_bit();
	328	clear_bit(XPRT_CONNECTING, &xprt->state);
	329	smp_mb__after_clear_bit();
	330	}
	331
	332	static inline int xprt_connecting(struct rpc_xprt *xprt)
	333	{
	334	return test_bit(XPRT_CONNECTING, &xprt->state);
	335	}
	336
	337	static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt)
	338	{
	339	return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
	340	}
1da177e4	341
ec739ef0 CL	342	static inline void xprt_set_bound(struct rpc_xprt *xprt)
	343	{
	344	test_and_set_bit(XPRT_BOUND, &xprt->state);
	345	}
	346
	347	static inline int xprt_bound(struct rpc_xprt *xprt)
	348	{
	349	return test_bit(XPRT_BOUND, &xprt->state);
	350	}
	351
	352	static inline void xprt_clear_bound(struct rpc_xprt *xprt)
	353	{
	354	clear_bit(XPRT_BOUND, &xprt->state);
	355	}
	356
4a68179d CL	357	static inline void xprt_clear_binding(struct rpc_xprt *xprt)
	358	{
	359	smp_mb__before_clear_bit();
	360	clear_bit(XPRT_BINDING, &xprt->state);
	361	smp_mb__after_clear_bit();
	362	}
	363
	364	static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
	365	{
	366	return test_and_set_bit(XPRT_BINDING, &xprt->state);
	367	}
	368
1da177e4 LT	369	#endif /* __KERNEL__*/
	370
	371	#endif /* _LINUX_SUNRPC_XPRT_H */