include/linux/sunrpc/sched.h - third_party/kernel - Git at Google


            
            /* SPDX-License-Identifier: GPL-2.0 */

            
            /*

            
             * 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/ktime.h>

            
            #include <linux/sunrpc/types.h>

            
            #include <linux/spinlock.h>

            
            #include <linux/wait_bit.h>

            
            #include <linux/workqueue.h>

            
            #include <linux/sunrpc/xdr.h>


            /*

            
             * This is the actual RPC procedure call info.

            
             */

            
            struct rpc_procinfo;

            
            struct rpc_message {

            
            	const struct rpc_procinfo *rpc_proc;	/* Procedure information */

            
            	void *			rpc_argp;	/* Arguments */

            
            	void *			rpc_resp;	/* Result */

            
            	const struct 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 list_head	timer_list;	/* Timer list */

            
            };


            /*

            
             * 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;

            
            };


            /*

            
             * This is the RPC task struct

            
             */

            
            struct rpc_task {

            
            	atomic_t		tk_count;	/* Reference count */

            
            	int			tk_status;	/* result of last operation */

            
            	struct list_head	tk_task;	/* global list of tasks */


            	/*

            
            	 * callback	to be executed after waking up

            
            	 * action	next procedure for async tasks

            
            	 */

            
            	void			(*tk_callback)(struct rpc_task *);

            
            	void			(*tk_action)(struct rpc_task *);


            	unsigned long		tk_timeout;	/* timeout for rpc_sleep() */

            
            	unsigned long		tk_runstate;	/* Task run status */


            	struct rpc_wait_queue 	*tk_waitqueue;	/* RPC wait queue we're on */

            
            	union {

            
            		struct work_struct	tk_work;	/* Async task work queue */

            
            		struct rpc_wait		tk_wait;	/* RPC wait */

            
            	} u;


            	/*

            
            	 * RPC call state

            
            	 */

            
            	struct rpc_message	tk_msg;		/* RPC call info */

            
            	void *			tk_calldata;	/* Caller private data */

            
            	const struct rpc_call_ops *tk_ops;	/* Caller callbacks */


            	struct rpc_clnt *	tk_client;	/* RPC client */

            
            	struct rpc_xprt *	tk_xprt;	/* Transport */

            
            	struct rpc_cred *	tk_op_cred;	/* cred being operated on */


            	struct rpc_rqst *	tk_rqstp;	/* RPC request */


            	struct workqueue_struct	*tk_workqueue;	/* Normally rpciod, but could

            
            						 * be any workqueue

            
            						 */

            
            	ktime_t			tk_start;	/* RPC task init timestamp */


            	pid_t			tk_owner;	/* Process id for batching tasks */


            	int			tk_rpc_status;	/* Result of last RPC operation */

            
            	unsigned short		tk_flags;	/* misc flags */

            
            	unsigned short		tk_timeouts;	/* maj timeouts */


            #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS)

            
            	unsigned short		tk_pid;		/* debugging aid */

            
            #endif

            
            	unsigned char		tk_priority : 2,/* Task priority */

            
            				tk_garb_retry : 2,

            
            				tk_cred_retry : 2;

            
            };


            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_count_stats)(struct rpc_task *, void *);

            
            	void (*rpc_release)(void *);

            
            };


            struct rpc_task_setup {

            
            	struct rpc_task *task;

            
            	struct rpc_clnt *rpc_client;

            
            	struct rpc_xprt *rpc_xprt;

            
            	struct rpc_cred *rpc_op_cred;	/* credential being operated on */

            
            	const struct rpc_message *rpc_message;

            
            	const struct rpc_call_ops *callback_ops;

            
            	void *callback_data;

            
            	struct workqueue_struct *workqueue;

            
            	unsigned short flags;

            
            	signed char priority;

            
            };


            /*

            
             * RPC task flags

            
             */

            
            #define RPC_TASK_ASYNC		0x0001		/* is an async task */

            
            #define RPC_TASK_SWAPPER	0x0002		/* is swapping in/out */

            
            #define RPC_TASK_MOVEABLE	0x0004		/* nfs4.1+ rpc tasks */

            
            #define RPC_TASK_NULLCREDS	0x0010		/* Use AUTH_NULL credential */

            
            #define RPC_CALL_MAJORSEEN	0x0020		/* major timeout seen */

            
            #define RPC_TASK_NETUNREACH_FATAL 0x0040	/* ENETUNREACH is fatal */

            
            #define RPC_TASK_DYNAMIC	0x0080		/* task was kmalloc'ed */

            
            #define	RPC_TASK_NO_ROUND_ROBIN	0x0100		/* send requests on "main" xprt */

            
            #define RPC_TASK_SOFT		0x0200		/* Use soft timeouts */

            
            #define RPC_TASK_SOFTCONN	0x0400		/* Fail if can't connect */

            
            #define RPC_TASK_SENT		0x0800		/* message was sent */

            
            #define RPC_TASK_TIMEOUT	0x1000		/* fail with ETIMEDOUT on timeout */

            
            #define RPC_TASK_NOCONNECT	0x2000		/* return ENOTCONN if not connected */

            
            #define RPC_TASK_NO_RETRANS_TIMEOUT	0x4000		/* wait forever for a reply */

            
            #define RPC_TASK_CRED_NOREF	0x8000		/* No refcount on the credential */


            #define RPC_IS_ASYNC(t)		((t)->tk_flags & RPC_TASK_ASYNC)

            
            #define RPC_IS_SWAPPER(t)	((t)->tk_flags & RPC_TASK_SWAPPER)

            
            #define RPC_IS_SOFT(t)		((t)->tk_flags & (RPC_TASK_SOFT|RPC_TASK_TIMEOUT))

            
            #define RPC_IS_SOFTCONN(t)	((t)->tk_flags & RPC_TASK_SOFTCONN)

            
            #define RPC_WAS_SENT(t)		((t)->tk_flags & RPC_TASK_SENT)

            
            #define RPC_IS_MOVEABLE(t)	((t)->tk_flags & RPC_TASK_MOVEABLE)


            enum {

            
            	RPC_TASK_RUNNING,

            
            	RPC_TASK_QUEUED,

            
            	RPC_TASK_ACTIVE,

            
            	RPC_TASK_NEED_XMIT,

            
            	RPC_TASK_NEED_RECV,

            
            	RPC_TASK_MSG_PIN_WAIT,

            
            };


            #define rpc_test_and_set_running(t) \

            
            				test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)

            
            #define rpc_clear_running(t)	clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)


            #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)	clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)


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


            #define RPC_SIGNALLED(t)	(READ_ONCE(task->tk_rpc_status) == -ERESTARTSYS)


            /*

            
             * Task priorities.

            
             * Note: if you change these, you must also change

            
             * the task initialization definitions below.

            
             */

            
            #define RPC_PRIORITY_LOW	(-1)

            
            #define RPC_PRIORITY_NORMAL	(0)

            
            #define RPC_PRIORITY_HIGH	(1)

            
            #define RPC_PRIORITY_PRIVILEGED	(2)

            
            #define RPC_NR_PRIORITY		(1 + RPC_PRIORITY_PRIVILEGED - RPC_PRIORITY_LOW)


            struct rpc_timer {

            
            	struct list_head list;

            
            	unsigned long expires;

            
            	struct delayed_work dwork;

            
            };


            /*

            
             * RPC synchronization objects

            
             */

            
            struct rpc_wait_queue {

            
            	spinlock_t		lock;

            
            	struct list_head	tasks[RPC_NR_PRIORITY];	/* task queue for each priority level */

            
            	unsigned char		maxpriority;		/* maximum priority (0 if queue is not a priority queue) */

            
            	unsigned char		priority;		/* current priority */

            
            	unsigned char		nr;			/* # tasks remaining for cookie */

            
            	unsigned int		qlen;			/* total # tasks waiting in queue */

            
            	struct rpc_timer	timer_list;

            
            #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS)

            
            	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_IS_PRIORITY(q)		((q)->maxpriority > 0)


            /*

            
             * Function prototypes

            
             */

            
            struct rpc_task *rpc_new_task(const struct rpc_task_setup *);

            
            struct rpc_task *rpc_run_task(const struct rpc_task_setup *);

            
            struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req,

            
            		struct rpc_timeout *timeout);

            
            void		rpc_put_task(struct rpc_task *);

            
            void		rpc_put_task_async(struct rpc_task *);

            
            bool		rpc_task_set_rpc_status(struct rpc_task *task, int rpc_status);

            
            void		rpc_task_try_cancel(struct rpc_task *task, int error);

            
            void		rpc_signal_task(struct rpc_task *);

            
            void		rpc_exit_task(struct rpc_task *);

            
            void		rpc_exit(struct rpc_task *, int);

            
            void		rpc_release_calldata(const struct rpc_call_ops *, void *);

            
            void		rpc_killall_tasks(struct rpc_clnt *);

            
            unsigned long	rpc_cancel_tasks(struct rpc_clnt *clnt, int error,

            
            				 bool (*fnmatch)(const struct rpc_task *,

            
            						 const void *),

            
            				 const void *data);

            
            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_destroy_wait_queue(struct rpc_wait_queue *);

            
            unsigned long	rpc_task_timeout(const struct rpc_task *task);

            
            void		rpc_sleep_on_timeout(struct rpc_wait_queue *queue,

            
            					struct rpc_task *task,

            
            					rpc_action action,

            
            					unsigned long timeout);

            
            void		rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,

            
            					rpc_action action);

            
            void		rpc_sleep_on_priority_timeout(struct rpc_wait_queue *queue,

            
            					struct rpc_task *task,

            
            					unsigned long timeout,

            
            					int priority);

            
            void		rpc_sleep_on_priority(struct rpc_wait_queue *,

            
            					struct rpc_task *,

            
            					int priority);

            
            void		rpc_wake_up_queued_task(struct rpc_wait_queue *,

            
            					struct rpc_task *);

            
            void		rpc_wake_up_queued_task_set_status(struct rpc_wait_queue *,

            
            						   struct rpc_task *,

            
            						   int);

            
            void		rpc_wake_up(struct rpc_wait_queue *);

            
            struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);

            
            struct rpc_task *rpc_wake_up_first_on_wq(struct workqueue_struct *wq,

            
            					struct rpc_wait_queue *,

            
            					bool (*)(struct rpc_task *, void *),

            
            					void *);

            
            struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *,

            
            					bool (*)(struct rpc_task *, void *),

            
            					void *);

            
            void		rpc_wake_up_status(struct rpc_wait_queue *, int);

            
            void		rpc_delay(struct rpc_task *, unsigned long);

            
            int		rpc_malloc(struct rpc_task *);

            
            void		rpc_free(struct rpc_task *);

            
            int		rpciod_up(void);

            
            void		rpciod_down(void);

            
            int		rpc_wait_for_completion_task(struct rpc_task *task);

            
            #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)

            
            struct net;

            
            void		rpc_show_tasks(struct net *);

            
            #endif

            
            int		rpc_init_mempool(void);

            
            void		rpc_destroy_mempool(void);

            
            extern struct workqueue_struct *rpciod_workqueue;

            
            extern struct workqueue_struct *xprtiod_workqueue;

            
            void		rpc_prepare_task(struct rpc_task *task);

            
            gfp_t		rpc_task_gfp_mask(void);


            #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) || IS_ENABLED(CONFIG_TRACEPOINTS)

            
            static inline const char * rpc_qname(const struct rpc_wait_queue *q)

            
            {

            
            	return ((q && q->name) ? q->name : "unknown");

            
            }


            static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,

            
            		const char *name)

            
            {

            
            	q->name = name;

            
            }

            
            #else

            
            static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,

            
            		const char *name)

            
            {

            
            }

            
            #endif


            #if IS_ENABLED(CONFIG_SUNRPC_SWAP)

            
            int rpc_clnt_swap_activate(struct rpc_clnt *clnt);

            
            void rpc_clnt_swap_deactivate(struct rpc_clnt *clnt);

            
            #else

            
            static inline int

            
            rpc_clnt_swap_activate(struct rpc_clnt *clnt)

            
            {

            
            	return -EINVAL;

            
            }


            static inline void

            
            rpc_clnt_swap_deactivate(struct rpc_clnt *clnt)

            
            {

            
            }

            
            #endif /* CONFIG_SUNRPC_SWAP */


            #endif /* _LINUX_SUNRPC_SCHED_H_ */
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* 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/ktime.h>
	#include <linux/sunrpc/types.h>
	#include <linux/spinlock.h>
	#include <linux/wait_bit.h>
	#include <linux/workqueue.h>
	#include <linux/sunrpc/xdr.h>

	/*
	* This is the actual RPC procedure call info.
	*/
	struct rpc_procinfo;
	struct rpc_message {
	const struct rpc_procinfo rpc_proc; / Procedure information */
	void * rpc_argp; /* Arguments */
	void * rpc_resp; /* Result */
	const struct 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 list_head timer_list; /* Timer list */
	};

	/*
	* 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;
	};

	/*
	* This is the RPC task struct
	*/
	struct rpc_task {
	atomic_t tk_count; /* Reference count */
	int tk_status; /* result of last operation */
	struct list_head tk_task; /* global list of tasks */

	/*
	* callback to be executed after waking up
	* action next procedure for async tasks
	*/
	void (tk_callback)(struct rpc_task );
	void (tk_action)(struct rpc_task );

	unsigned long tk_timeout; /* timeout for rpc_sleep() */
	unsigned long tk_runstate; /* Task run status */

	struct rpc_wait_queue tk_waitqueue; / RPC wait queue we're on */
	union {
	struct work_struct tk_work; /* Async task work queue */
	struct rpc_wait tk_wait; /* RPC wait */
	} u;

	/*
	* RPC call state
	*/
	struct rpc_message tk_msg; /* RPC call info */
	void * tk_calldata; /* Caller private data */
	const struct rpc_call_ops tk_ops; / Caller callbacks */

	struct rpc_clnt * tk_client; /* RPC client */
	struct rpc_xprt * tk_xprt; /* Transport */
	struct rpc_cred * tk_op_cred; /* cred being operated on */

	struct rpc_rqst * tk_rqstp; /* RPC request */

	struct workqueue_struct tk_workqueue; / Normally rpciod, but could
	* be any workqueue
	*/
	ktime_t tk_start; /* RPC task init timestamp */

	pid_t tk_owner; /* Process id for batching tasks */

	int tk_rpc_status; /* Result of last RPC operation */
	unsigned short tk_flags; /* misc flags */
	unsigned short tk_timeouts; /* maj timeouts */

	#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) \|\| IS_ENABLED(CONFIG_TRACEPOINTS)
	unsigned short tk_pid; /* debugging aid */
	#endif
	unsigned char tk_priority : 2,/* Task priority */
	tk_garb_retry : 2,
	tk_cred_retry : 2;
	};

	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_count_stats)(struct rpc_task , void *);
	void (rpc_release)(void );
	};

	struct rpc_task_setup {
	struct rpc_task *task;
	struct rpc_clnt *rpc_client;
	struct rpc_xprt *rpc_xprt;
	struct rpc_cred rpc_op_cred; / credential being operated on */
	const struct rpc_message *rpc_message;
	const struct rpc_call_ops *callback_ops;
	void *callback_data;
	struct workqueue_struct *workqueue;
	unsigned short flags;
	signed char priority;
	};

	/*
	* RPC task flags
	*/
	#define RPC_TASK_ASYNC 0x0001 /* is an async task */
	#define RPC_TASK_SWAPPER 0x0002 /* is swapping in/out */
	#define RPC_TASK_MOVEABLE 0x0004 /* nfs4.1+ rpc tasks */
	#define RPC_TASK_NULLCREDS 0x0010 /* Use AUTH_NULL credential */
	#define RPC_CALL_MAJORSEEN 0x0020 /* major timeout seen */
	#define RPC_TASK_NETUNREACH_FATAL 0x0040 /* ENETUNREACH is fatal */
	#define RPC_TASK_DYNAMIC 0x0080 /* task was kmalloc'ed */
	#define RPC_TASK_NO_ROUND_ROBIN 0x0100 /* send requests on "main" xprt */
	#define RPC_TASK_SOFT 0x0200 /* Use soft timeouts */
	#define RPC_TASK_SOFTCONN 0x0400 /* Fail if can't connect */
	#define RPC_TASK_SENT 0x0800 /* message was sent */
	#define RPC_TASK_TIMEOUT 0x1000 /* fail with ETIMEDOUT on timeout */
	#define RPC_TASK_NOCONNECT 0x2000 /* return ENOTCONN if not connected */
	#define RPC_TASK_NO_RETRANS_TIMEOUT 0x4000 /* wait forever for a reply */
	#define RPC_TASK_CRED_NOREF 0x8000 /* No refcount on the credential */

	#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
	#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
	#define RPC_IS_SOFT(t) ((t)->tk_flags & (RPC_TASK_SOFT\|RPC_TASK_TIMEOUT))
	#define RPC_IS_SOFTCONN(t) ((t)->tk_flags & RPC_TASK_SOFTCONN)
	#define RPC_WAS_SENT(t) ((t)->tk_flags & RPC_TASK_SENT)
	#define RPC_IS_MOVEABLE(t) ((t)->tk_flags & RPC_TASK_MOVEABLE)

	enum {
	RPC_TASK_RUNNING,
	RPC_TASK_QUEUED,
	RPC_TASK_ACTIVE,
	RPC_TASK_NEED_XMIT,
	RPC_TASK_NEED_RECV,
	RPC_TASK_MSG_PIN_WAIT,
	};

	#define rpc_test_and_set_running(t) \
	test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)
	#define rpc_clear_running(t) clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate)

	#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) clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate)

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

	#define RPC_SIGNALLED(t) (READ_ONCE(task->tk_rpc_status) == -ERESTARTSYS)

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

	struct rpc_timer {
	struct list_head list;
	unsigned long expires;
	struct delayed_work dwork;
	};

	/*
	* RPC synchronization objects
	*/
	struct rpc_wait_queue {
	spinlock_t lock;
	struct list_head tasks[RPC_NR_PRIORITY]; /* task queue for each priority level */
	unsigned char maxpriority; /* maximum priority (0 if queue is not a priority queue) */
	unsigned char priority; /* current priority */
	unsigned char nr; /* # tasks remaining for cookie */
	unsigned int qlen; /* total # tasks waiting in queue */
	struct rpc_timer timer_list;
	#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) \|\| IS_ENABLED(CONFIG_TRACEPOINTS)
	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_IS_PRIORITY(q) ((q)->maxpriority > 0)

	/*
	* Function prototypes
	*/
	struct rpc_task rpc_new_task(const struct rpc_task_setup );
	struct rpc_task rpc_run_task(const struct rpc_task_setup );
	struct rpc_task rpc_run_bc_task(struct rpc_rqst req,
	struct rpc_timeout *timeout);
	void rpc_put_task(struct rpc_task *);
	void rpc_put_task_async(struct rpc_task *);
	bool rpc_task_set_rpc_status(struct rpc_task *task, int rpc_status);
	void rpc_task_try_cancel(struct rpc_task *task, int error);
	void rpc_signal_task(struct rpc_task *);
	void rpc_exit_task(struct rpc_task *);
	void rpc_exit(struct rpc_task *, int);
	void rpc_release_calldata(const struct rpc_call_ops , void );
	void rpc_killall_tasks(struct rpc_clnt *);
	unsigned long rpc_cancel_tasks(struct rpc_clnt *clnt, int error,
	bool (fnmatch)(const struct rpc_task ,
	const void *),
	const void *data);
	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_destroy_wait_queue(struct rpc_wait_queue *);
	unsigned long rpc_task_timeout(const struct rpc_task *task);
	void rpc_sleep_on_timeout(struct rpc_wait_queue *queue,
	struct rpc_task *task,
	rpc_action action,
	unsigned long timeout);
	void rpc_sleep_on(struct rpc_wait_queue , struct rpc_task ,
	rpc_action action);
	void rpc_sleep_on_priority_timeout(struct rpc_wait_queue *queue,
	struct rpc_task *task,
	unsigned long timeout,
	int priority);
	void rpc_sleep_on_priority(struct rpc_wait_queue *,
	struct rpc_task *,
	int priority);
	void rpc_wake_up_queued_task(struct rpc_wait_queue *,
	struct rpc_task *);
	void rpc_wake_up_queued_task_set_status(struct rpc_wait_queue *,
	struct rpc_task *,
	int);
	void rpc_wake_up(struct rpc_wait_queue *);
	struct rpc_task rpc_wake_up_next(struct rpc_wait_queue );
	struct rpc_task rpc_wake_up_first_on_wq(struct workqueue_struct wq,
	struct rpc_wait_queue *,
	bool ()(struct rpc_task , void *),
	void *);
	struct rpc_task rpc_wake_up_first(struct rpc_wait_queue ,
	bool ()(struct rpc_task , void *),
	void *);
	void rpc_wake_up_status(struct rpc_wait_queue *, int);
	void rpc_delay(struct rpc_task *, unsigned long);
	int rpc_malloc(struct rpc_task *);
	void rpc_free(struct rpc_task *);
	int rpciod_up(void);
	void rpciod_down(void);
	int rpc_wait_for_completion_task(struct rpc_task *task);
	#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
	struct net;
	void rpc_show_tasks(struct net *);
	#endif
	int rpc_init_mempool(void);
	void rpc_destroy_mempool(void);
	extern struct workqueue_struct *rpciod_workqueue;
	extern struct workqueue_struct *xprtiod_workqueue;
	void rpc_prepare_task(struct rpc_task *task);
	gfp_t rpc_task_gfp_mask(void);

	#if IS_ENABLED(CONFIG_SUNRPC_DEBUG) \|\| IS_ENABLED(CONFIG_TRACEPOINTS)
	static inline const char * rpc_qname(const struct rpc_wait_queue *q)
	{
	return ((q && q->name) ? q->name : "unknown");
	}

	static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
	const char *name)
	{
	q->name = name;
	}
	#else
	static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
	const char *name)
	{
	}
	#endif

	#if IS_ENABLED(CONFIG_SUNRPC_SWAP)
	int rpc_clnt_swap_activate(struct rpc_clnt *clnt);
	void rpc_clnt_swap_deactivate(struct rpc_clnt *clnt);
	#else
	static inline int
	rpc_clnt_swap_activate(struct rpc_clnt *clnt)
	{
	return -EINVAL;
	}

	static inline void
	rpc_clnt_swap_deactivate(struct rpc_clnt *clnt)
	{
	}
	#endif /* CONFIG_SUNRPC_SWAP */

	#endif /* _LINUX_SUNRPC_SCHED_H_ */