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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*/
#ifndef __XFS_PWORK_H__
#define __XFS_PWORK_H__
struct xfs_pwork;
struct xfs_mount;
typedef int (*xfs_pwork_work_fn)(struct xfs_mount *mp, struct xfs_pwork *pwork);
/*
* Parallel work coordination structure.
*/
struct xfs_pwork_ctl {
struct workqueue_struct *wq;
struct xfs_mount *mp;
xfs_pwork_work_fn work_fn;
struct wait_queue_head poll_wait;
atomic_t nr_work;
int error;
};
/*
* Embed this parallel work control item inside your own work structure,
* then queue work with it.
*/
struct xfs_pwork {
struct work_struct work;
struct xfs_pwork_ctl *pctl;
};
#define XFS_PWORK_SINGLE_THREADED { .pctl = NULL }
/* Have we been told to abort? */
static inline bool
xfs_pwork_ctl_want_abort(
struct xfs_pwork_ctl *pctl)
{
return pctl && pctl->error;
}
/* Have we been told to abort? */
static inline bool
xfs_pwork_want_abort(
struct xfs_pwork *pwork)
{
return xfs_pwork_ctl_want_abort(pwork->pctl);
}
int xfs_pwork_init(struct xfs_mount *mp, struct xfs_pwork_ctl *pctl,
xfs_pwork_work_fn work_fn, const char *tag,
unsigned int nr_threads);
void xfs_pwork_queue(struct xfs_pwork_ctl *pctl, struct xfs_pwork *pwork);
int xfs_pwork_destroy(struct xfs_pwork_ctl *pctl);
void xfs_pwork_poll(struct xfs_pwork_ctl *pctl);
unsigned int xfs_pwork_guess_datadev_parallelism(struct xfs_mount *mp);
#endif /* __XFS_PWORK_H__ */
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