[mirror_ubuntu-bionic-kernel.git] / include / linux / sunrpc / sched.h

/*
 * linux/include/linux/sunrpc/sched.h
 *
 * Scheduling primitives for kernel Sun RPC.
 *
 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
 */

#ifndef _LINUX_SUNRPC_SCHED_H_
#define _LINUX_SUNRPC_SCHED_H_

#include <linux/timer.h>
#include <linux/sunrpc/types.h>
#include <linux/rcupdate.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/sunrpc/xdr.h>

/*
 * This is the actual RPC procedure call info.
 */
struct rpc_procinfo;
struct rpc_message {
	struct rpc_procinfo *	rpc_proc;	/* Procedure information */
	void *			rpc_argp;	/* Arguments */
	void *			rpc_resp;	/* Result */
	struct rpc_cred *	rpc_cred;	/* Credentials */
};

struct rpc_call_ops;
struct rpc_wait_queue;
struct rpc_wait {
	struct list_head	list;		/* wait queue links */
	struct list_head	links;		/* Links to related tasks */
	struct rpc_wait_queue *	rpc_waitq;	/* RPC wait queue we're on */
};

/*
 * This is the RPC task struct
 */
struct rpc_task {
#ifdef RPC_DEBUG
	unsigned long		tk_magic;	/* 0xf00baa */
#endif
	atomic_t		tk_count;	/* Reference count */
	struct list_head	tk_task;	/* global list of tasks */
	struct rpc_clnt *	tk_client;	/* RPC client */
	struct rpc_rqst *	tk_rqstp;	/* RPC request */
	int			tk_status;	/* result of last operation */

	/*
	 * RPC call state
	 */
	struct rpc_message	tk_msg;		/* RPC call info */
	__u8			tk_garb_retry;
	__u8			tk_cred_retry;

	unsigned long		tk_cookie;	/* Cookie for batching tasks */

	/*
	 * timeout_fn   to be executed by timer bottom half
	 * callback	to be executed after waking up
	 * action	next procedure for async tasks
	 * tk_ops	caller callbacks
	 */
	void			(*tk_timeout_fn)(struct rpc_task *);
	void			(*tk_callback)(struct rpc_task *);
	void			(*tk_action)(struct rpc_task *);
	const struct rpc_call_ops *tk_ops;
	void *			tk_calldata;

	/*
	 * tk_timer is used for async processing by the RPC scheduling
	 * primitives. You should not access this directly unless
	 * you have a pathological interest in kernel oopses.
	 */
	struct timer_list	tk_timer;	/* kernel timer */
	unsigned long		tk_timeout;	/* timeout for rpc_sleep() */
	unsigned short		tk_flags;	/* misc flags */
	unsigned char		tk_priority : 2;/* Task priority */
	unsigned long		tk_runstate;	/* Task run status */
	struct workqueue_struct	*tk_workqueue;	/* Normally rpciod, but could
						 * be any workqueue
						 */
	union {
		struct work_struct	tk_work;	/* Async task work queue */
		struct rpc_wait		tk_wait;	/* RPC wait */
		struct rcu_head		tk_rcu;		/* for task deletion */
	} u;

	unsigned short		tk_timeouts;	/* maj timeouts */
	size_t			tk_bytes_sent;	/* total bytes sent */
	unsigned long		tk_start;	/* RPC task init timestamp */
	long			tk_rtt;		/* round-trip time (jiffies) */

#ifdef RPC_DEBUG
	unsigned short		tk_pid;		/* debugging aid */
#endif
};
#define tk_xprt			tk_client->cl_xprt

/* support walking a list of tasks on a wait queue */
#define	task_for_each(task, pos, head) \
	list_for_each(pos, head) \
		if ((task=list_entry(pos, struct rpc_task, u.tk_wait.list)),1)

#define	task_for_first(task, head) \
	if (!list_empty(head) &&  \
	    ((task=list_entry((head)->next, struct rpc_task, u.tk_wait.list)),1))

typedef void			(*rpc_action)(struct rpc_task *);

struct rpc_call_ops {
	void (*rpc_call_prepare)(struct rpc_task *, void *);
	void (*rpc_call_done)(struct rpc_task *, void *);
	void (*rpc_release)(void *);
};


/*
 * RPC task flags
 */
#define RPC_TASK_ASYNC		0x0001		/* is an async task */
#define RPC_TASK_SWAPPER	0x0002		/* is swapping in/out */
#define RPC_CALL_MAJORSEEN	0x0020		/* major timeout seen */
#define RPC_TASK_ROOTCREDS	0x0040		/* force root creds */
#define RPC_TASK_DYNAMIC	0x0080		/* task was kmalloc'ed */
#define RPC_TASK_KILLED		0x0100		/* task was killed */
#define RPC_TASK_SOFT		0x0200		/* Use soft timeouts */
#define RPC_TASK_NOINTR		0x0400		/* uninterruptible task */

#define RPC_IS_ASYNC(t)		((t)->tk_flags & RPC_TASK_ASYNC)
#define RPC_IS_SWAPPER(t)	((t)->tk_flags & RPC_TASK_SWAPPER)
#define RPC_DO_ROOTOVERRIDE(t)	((t)->tk_flags & RPC_TASK_ROOTCREDS)
#define RPC_ASSASSINATED(t)	((t)->tk_flags & RPC_TASK_KILLED)
#define RPC_DO_CALLBACK(t)	((t)->tk_callback != NULL)
#define RPC_IS_SOFT(t)		((t)->tk_flags & RPC_TASK_SOFT)
#define RPC_TASK_UNINTERRUPTIBLE(t) ((t)->tk_flags & RPC_TASK_NOINTR)

#define RPC_TASK_RUNNING	0
#define RPC_TASK_QUEUED		1
#define RPC_TASK_WAKEUP		2
#define RPC_TASK_HAS_TIMER	3
#define RPC_TASK_ACTIVE		4

#define RPC_IS_RUNNING(t)	test_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
#define rpc_set_running(t)	set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
#define rpc_test_and_set_running(t) \
				test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
#define rpc_clear_running(t)	\
	do { \
		smp_mb__before_clear_bit(); \
		clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate); \
		smp_mb__after_clear_bit(); \
	} while (0)

#define RPC_IS_QUEUED(t)	test_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
#define rpc_set_queued(t)	set_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
#define rpc_clear_queued(t)	\
	do { \
		smp_mb__before_clear_bit(); \
		clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate); \
		smp_mb__after_clear_bit(); \
	} while (0)

#define rpc_start_wakeup(t) \
	(test_and_set_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate) == 0)
#define rpc_finish_wakeup(t) \
	do { \
		smp_mb__before_clear_bit(); \
		clear_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate); \
		smp_mb__after_clear_bit(); \
	} while (0)

#define RPC_IS_ACTIVATED(t)	test_bit(RPC_TASK_ACTIVE, &(t)->tk_runstate)

/*
 * Task priorities.
 * Note: if you change these, you must also change
 * the task initialization definitions below.
 */
#define RPC_PRIORITY_LOW	0
#define RPC_PRIORITY_NORMAL	1
#define RPC_PRIORITY_HIGH	2
#define RPC_NR_PRIORITY		(RPC_PRIORITY_HIGH+1)

/*
 * RPC synchronization objects
 */
struct rpc_wait_queue {
	spinlock_t		lock;
	struct list_head	tasks[RPC_NR_PRIORITY];	/* task queue for each priority level */
	unsigned long		cookie;			/* cookie of last task serviced */
	unsigned char		maxpriority;		/* maximum priority (0 if queue is not a priority queue) */
	unsigned char		priority;		/* current priority */
	unsigned char		count;			/* # task groups remaining serviced so far */
	unsigned char		nr;			/* # tasks remaining for cookie */
	unsigned short		qlen;			/* total # tasks waiting in queue */
#ifdef RPC_DEBUG
	const char *		name;
#endif
};

/*
 * This is the # requests to send consecutively
 * from a single cookie.  The aim is to improve
 * performance of NFS operations such as read/write.
 */
#define RPC_BATCH_COUNT			16

#ifndef RPC_DEBUG
# define RPC_WAITQ_INIT(var,qname) { \
		.lock = __SPIN_LOCK_UNLOCKED(var.lock), \
		.tasks = { \
			[0] = LIST_HEAD_INIT(var.tasks[0]), \
			[1] = LIST_HEAD_INIT(var.tasks[1]), \
			[2] = LIST_HEAD_INIT(var.tasks[2]), \
		}, \
	}
#else
# define RPC_WAITQ_INIT(var,qname) { \
		.lock = __SPIN_LOCK_UNLOCKED(var.lock), \
		.tasks = { \
			[0] = LIST_HEAD_INIT(var.tasks[0]), \
			[1] = LIST_HEAD_INIT(var.tasks[1]), \
			[2] = LIST_HEAD_INIT(var.tasks[2]), \
		}, \
		.name = qname, \
	}
#endif
# define RPC_WAITQ(var,qname)      struct rpc_wait_queue var = RPC_WAITQ_INIT(var,qname)

#define RPC_IS_PRIORITY(q)		((q)->maxpriority > 0)

/*
 * Function prototypes
 */
struct rpc_task *rpc_new_task(struct rpc_clnt *, int flags,
				const struct rpc_call_ops *ops, void *data);
struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
				const struct rpc_call_ops *ops, void *data);
void		rpc_init_task(struct rpc_task *task, struct rpc_clnt *clnt,
				int flags, const struct rpc_call_ops *ops,
				void *data);
void		rpc_put_task(struct rpc_task *);
void		rpc_exit_task(struct rpc_task *);
void		rpc_release_calldata(const struct rpc_call_ops *, void *);
void		rpc_killall_tasks(struct rpc_clnt *);
void		rpc_execute(struct rpc_task *);
void		rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
void		rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
void		rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,
					rpc_action action, rpc_action timer);
void		rpc_wake_up_task(struct rpc_task *);
void		rpc_wake_up(struct rpc_wait_queue *);
struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
void		rpc_wake_up_status(struct rpc_wait_queue *, int);
void		rpc_delay(struct rpc_task *, unsigned long);
void *		rpc_malloc(struct rpc_task *, size_t);
void		rpc_free(void *);
int		rpciod_up(void);
void		rpciod_down(void);
int		__rpc_wait_for_completion_task(struct rpc_task *task, int (*)(void *));
#ifdef RPC_DEBUG
void		rpc_show_tasks(void);
#endif
int		rpc_init_mempool(void);
void		rpc_destroy_mempool(void);
extern struct workqueue_struct *rpciod_workqueue;

static inline void rpc_exit(struct rpc_task *task, int status)
{
	task->tk_status = status;
	task->tk_action = rpc_exit_task;
}

static inline int rpc_wait_for_completion_task(struct rpc_task *task)
{
	return __rpc_wait_for_completion_task(task, NULL);
}

#ifdef RPC_DEBUG
static inline const char * rpc_qname(struct rpc_wait_queue *q)
{
	return ((q && q->name) ? q->name : "unknown");
}
#endif

#endif /* _LINUX_SUNRPC_SCHED_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/sunrpc/sched.h
	3	*
	4	* Scheduling primitives for kernel Sun RPC.
	5	*
	6	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#ifndef _LINUX_SUNRPC_SCHED_H_
	10	#define _LINUX_SUNRPC_SCHED_H_
	11
	12	#include <linux/timer.h>
	13	#include <linux/sunrpc/types.h>
8aca67f0	14	#include <linux/rcupdate.h>
1da177e4 LT	15	#include <linux/spinlock.h>
	16	#include <linux/wait.h>
	17	#include <linux/workqueue.h>
	18	#include <linux/sunrpc/xdr.h>
	19
	20	/*
	21	* This is the actual RPC procedure call info.
	22	*/
	23	struct rpc_procinfo;
	24	struct rpc_message {
	25	struct rpc_procinfo * rpc_proc; /* Procedure information */
	26	void * rpc_argp; /* Arguments */
	27	void * rpc_resp; /* Result */
	28	struct rpc_cred * rpc_cred; /* Credentials */
	29	};
	30
963d8fe5	31	struct rpc_call_ops;
1da177e4 LT	32	struct rpc_wait_queue;
	33	struct rpc_wait {
	34	struct list_head list; /* wait queue links */
	35	struct list_head links; /* Links to related tasks */
1da177e4 LT	36	struct rpc_wait_queue * rpc_waitq; /* RPC wait queue we're on */
	37	};
	38
	39	/*
	40	* This is the RPC task struct
	41	*/
	42	struct rpc_task {
	43	#ifdef RPC_DEBUG
	44	unsigned long tk_magic; /* 0xf00baa */
	45	#endif
44c28873	46	atomic_t tk_count; /* Reference count */
1da177e4 LT	47	struct list_head tk_task; /* global list of tasks */
	48	struct rpc_clnt * tk_client; /* RPC client */
	49	struct rpc_rqst * tk_rqstp; /* RPC request */
	50	int tk_status; /* result of last operation */
	51
	52	/*
	53	* RPC call state
	54	*/
	55	struct rpc_message tk_msg; /* RPC call info */
1da177e4 LT	56	__u8 tk_garb_retry;
	57	__u8 tk_cred_retry;
	58
	59	unsigned long tk_cookie; /* Cookie for batching tasks */
	60
	61	/*
	62	* timeout_fn to be executed by timer bottom half
	63	* callback to be executed after waking up
	64	* action next procedure for async tasks
963d8fe5	65	* tk_ops caller callbacks
1da177e4 LT	66	*/
	67	void (tk_timeout_fn)(struct rpc_task );
	68	void (tk_callback)(struct rpc_task );
	69	void (tk_action)(struct rpc_task );
963d8fe5	70	const struct rpc_call_ops *tk_ops;
1da177e4 LT	71	void * tk_calldata;
	72
	73	/*
	74	* tk_timer is used for async processing by the RPC scheduling
	75	* primitives. You should not access this directly unless
	76	* you have a pathological interest in kernel oopses.
	77	*/
	78	struct timer_list tk_timer; /* kernel timer */
	79	unsigned long tk_timeout; /* timeout for rpc_sleep() */
	80	unsigned short tk_flags; /* misc flags */
1da177e4 LT	81	unsigned char tk_priority : 2;/* Task priority */
	82	unsigned long tk_runstate; /* Task run status */
	83	struct workqueue_struct tk_workqueue; / Normally rpciod, but could
	84	* be any workqueue
	85	*/
	86	union {
	87	struct work_struct tk_work; /* Async task work queue */
	88	struct rpc_wait tk_wait; /* RPC wait */
8aca67f0	89	struct rcu_head tk_rcu; /* for task deletion */
1da177e4	90	} u;
ef759a2e CL	91
	92	unsigned short tk_timeouts; /* maj timeouts */
	93	size_t tk_bytes_sent; /* total bytes sent */
	94	unsigned long tk_start; /* RPC task init timestamp */
	95	long tk_rtt; /* round-trip time (jiffies) */
	96
1da177e4 LT	97	#ifdef RPC_DEBUG
	98	unsigned short tk_pid; /* debugging aid */
	99	#endif
	100	};
1da177e4 LT	101	#define tk_xprt tk_client->cl_xprt
	102
	103	/* support walking a list of tasks on a wait queue */
	104	#define task_for_each(task, pos, head) \
	105	list_for_each(pos, head) \
	106	if ((task=list_entry(pos, struct rpc_task, u.tk_wait.list)),1)
	107
	108	#define task_for_first(task, head) \
	109	if (!list_empty(head) && \
	110	((task=list_entry((head)->next, struct rpc_task, u.tk_wait.list)),1))
	111
1da177e4 LT	112	typedef void (rpc_action)(struct rpc_task );
1da177e4 LT	113
963d8fe5	114	struct rpc_call_ops {
4ce70ada	115	void (rpc_call_prepare)(struct rpc_task , void *);
963d8fe5 TM	116	void (rpc_call_done)(struct rpc_task , void *);
	117	void (rpc_release)(void );
	118	};
	119
	120
1da177e4 LT	121	/*
	122	* RPC task flags
	123	*/
	124	#define RPC_TASK_ASYNC 0x0001 /* is an async task */
	125	#define RPC_TASK_SWAPPER 0x0002 /* is swapping in/out */
1da177e4 LT	126	#define RPC_CALL_MAJORSEEN 0x0020 /* major timeout seen */
	127	#define RPC_TASK_ROOTCREDS 0x0040 /* force root creds */
	128	#define RPC_TASK_DYNAMIC 0x0080 /* task was kmalloc'ed */
	129	#define RPC_TASK_KILLED 0x0100 /* task was killed */
	130	#define RPC_TASK_SOFT 0x0200 /* Use soft timeouts */
	131	#define RPC_TASK_NOINTR 0x0400 /* uninterruptible task */
	132
	133	#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
1da177e4 LT	134	#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
	135	#define RPC_DO_ROOTOVERRIDE(t) ((t)->tk_flags & RPC_TASK_ROOTCREDS)
	136	#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
1da177e4 LT	137	#define RPC_DO_CALLBACK(t) ((t)->tk_callback != NULL)
	138	#define RPC_IS_SOFT(t) ((t)->tk_flags & RPC_TASK_SOFT)
	139	#define RPC_TASK_UNINTERRUPTIBLE(t) ((t)->tk_flags & RPC_TASK_NOINTR)
	140
	141	#define RPC_TASK_RUNNING 0
	142	#define RPC_TASK_QUEUED 1
	143	#define RPC_TASK_WAKEUP 2
	144	#define RPC_TASK_HAS_TIMER 3
44c28873	145	#define RPC_TASK_ACTIVE 4
1da177e4	146
7b8f850b RB	147	#define RPC_IS_RUNNING(t) test_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
7b8f850b RB	148	#define rpc_set_running(t) set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
1da177e4	149	#define rpc_test_and_set_running(t) \
7b8f850b	150	test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
1da177e4 LT	151	#define rpc_clear_running(t) \
	152	do { \
	153	smp_mb__before_clear_bit(); \
	154	clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate); \
	155	smp_mb__after_clear_bit(); \
	156	} while (0)
	157
7b8f850b RB	158	#define RPC_IS_QUEUED(t) test_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
7b8f850b RB	159	#define rpc_set_queued(t) set_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)
1da177e4 LT	160	#define rpc_clear_queued(t) \
	161	do { \
	162	smp_mb__before_clear_bit(); \
	163	clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate); \
	164	smp_mb__after_clear_bit(); \
	165	} while (0)
	166
	167	#define rpc_start_wakeup(t) \
	168	(test_and_set_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate) == 0)
	169	#define rpc_finish_wakeup(t) \
	170	do { \
	171	smp_mb__before_clear_bit(); \
	172	clear_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate); \
	173	smp_mb__after_clear_bit(); \
	174	} while (0)
	175
7b8f850b	176	#define RPC_IS_ACTIVATED(t) test_bit(RPC_TASK_ACTIVE, &(t)->tk_runstate)
44c28873	177
1da177e4 LT	178	/*
	179	* Task priorities.
	180	* Note: if you change these, you must also change
	181	* the task initialization definitions below.
	182	*/
	183	#define RPC_PRIORITY_LOW 0
	184	#define RPC_PRIORITY_NORMAL 1
	185	#define RPC_PRIORITY_HIGH 2
	186	#define RPC_NR_PRIORITY (RPC_PRIORITY_HIGH+1)
	187
	188	/*
	189	* RPC synchronization objects
	190	*/
	191	struct rpc_wait_queue {
	192	spinlock_t lock;
	193	struct list_head tasks[RPC_NR_PRIORITY]; /* task queue for each priority level */
	194	unsigned long cookie; /* cookie of last task serviced */
	195	unsigned char maxpriority; /* maximum priority (0 if queue is not a priority queue) */
	196	unsigned char priority; /* current priority */
	197	unsigned char count; /* # task groups remaining serviced so far */
	198	unsigned char nr; /* # tasks remaining for cookie */
e19b63da	199	unsigned short qlen; /* total # tasks waiting in queue */
1da177e4 LT	200	#ifdef RPC_DEBUG
	201	const char * name;
	202	#endif
	203	};
	204
	205	/*
	206	* This is the # requests to send consecutively
	207	* from a single cookie. The aim is to improve
	208	* performance of NFS operations such as read/write.
	209	*/
	210	#define RPC_BATCH_COUNT 16
	211
	212	#ifndef RPC_DEBUG
	213	# define RPC_WAITQ_INIT(var,qname) { \
6cfd76a2	214	.lock = __SPIN_LOCK_UNLOCKED(var.lock), \
1da177e4 LT	215	.tasks = { \
	216	[0] = LIST_HEAD_INIT(var.tasks[0]), \
	217	[1] = LIST_HEAD_INIT(var.tasks[1]), \
	218	[2] = LIST_HEAD_INIT(var.tasks[2]), \
	219	}, \
	220	}
	221	#else
	222	# define RPC_WAITQ_INIT(var,qname) { \
6cfd76a2	223	.lock = __SPIN_LOCK_UNLOCKED(var.lock), \
1da177e4 LT	224	.tasks = { \
	225	[0] = LIST_HEAD_INIT(var.tasks[0]), \
	226	[1] = LIST_HEAD_INIT(var.tasks[1]), \
	227	[2] = LIST_HEAD_INIT(var.tasks[2]), \
	228	}, \
	229	.name = qname, \
	230	}
	231	#endif
	232	# define RPC_WAITQ(var,qname) struct rpc_wait_queue var = RPC_WAITQ_INIT(var,qname)
	233
	234	#define RPC_IS_PRIORITY(q) ((q)->maxpriority > 0)
	235
	236	/*
	237	* Function prototypes
	238	*/
963d8fe5 TM	239	struct rpc_task rpc_new_task(struct rpc_clnt , int flags,
963d8fe5 TM	240	const struct rpc_call_ops ops, void data);
44c28873 TM	241	struct rpc_task rpc_run_task(struct rpc_clnt clnt, int flags,
44c28873 TM	242	const struct rpc_call_ops ops, void data);
963d8fe5 TM	243	void rpc_init_task(struct rpc_task task, struct rpc_clnt clnt,
	244	int flags, const struct rpc_call_ops *ops,
	245	void *data);
e6b3c4db	246	void rpc_put_task(struct rpc_task *);
abbcf28f	247	void rpc_exit_task(struct rpc_task *);
bbd5a1f9	248	void rpc_release_calldata(const struct rpc_call_ops , void );
1da177e4	249	void rpc_killall_tasks(struct rpc_clnt *);
2efef837	250	void rpc_execute(struct rpc_task *);
1da177e4 LT	251	void rpc_init_priority_wait_queue(struct rpc_wait_queue , const char );
	252	void rpc_init_wait_queue(struct rpc_wait_queue , const char );
	253	void rpc_sleep_on(struct rpc_wait_queue , struct rpc_task ,
	254	rpc_action action, rpc_action timer);
	255	void rpc_wake_up_task(struct rpc_task *);
	256	void rpc_wake_up(struct rpc_wait_queue *);
	257	struct rpc_task rpc_wake_up_next(struct rpc_wait_queue );
	258	void rpc_wake_up_status(struct rpc_wait_queue *, int);
	259	void rpc_delay(struct rpc_task *, unsigned long);
	260	void * rpc_malloc(struct rpc_task *, size_t);
c5a4dd8b	261	void rpc_free(void *);
1da177e4 LT	262	int rpciod_up(void);
1da177e4 LT	263	void rpciod_down(void);
44c28873	264	int __rpc_wait_for_completion_task(struct rpc_task task, int ()(void *));
1da177e4 LT	265	#ifdef RPC_DEBUG
	266	void rpc_show_tasks(void);
	267	#endif
	268	int rpc_init_mempool(void);
	269	void rpc_destroy_mempool(void);
24c5d9d7	270	extern struct workqueue_struct *rpciod_workqueue;
1da177e4 LT	271
	272	static inline void rpc_exit(struct rpc_task *task, int status)
	273	{
	274	task->tk_status = status;
abbcf28f	275	task->tk_action = rpc_exit_task;
1da177e4 LT	276	}
1da177e4 LT	277
44c28873 TM	278	static inline int rpc_wait_for_completion_task(struct rpc_task *task)
	279	{
	280	return __rpc_wait_for_completion_task(task, NULL);
	281	}
	282
1da177e4 LT	283	#ifdef RPC_DEBUG
	284	static inline const char * rpc_qname(struct rpc_wait_queue *q)
	285	{
	286	return ((q && q->name) ? q->name : "unknown");
	287	}
	288	#endif
	289
	290	#endif /* _LINUX_SUNRPC_SCHED_H_ */