| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2019 Oracle. All Rights Reserved. |
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| 4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
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| 5 | */ |
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| 6 | #ifndef __XFS_PWORK_H__ |
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| 7 | #define __XFS_PWORK_H__ |
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| 8 | |
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| 9 | struct xfs_pwork; |
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| 10 | struct xfs_mount; |
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| 11 | |
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| 12 | typedef int (*xfs_pwork_work_fn)(struct xfs_mount *mp, struct xfs_pwork *pwork); |
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| 13 | |
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| 14 | /* |
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| 15 | * Parallel work coordination structure. |
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| 16 | */ |
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| 17 | struct xfs_pwork_ctl { |
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| 18 | struct workqueue_struct *wq; |
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| 19 | struct xfs_mount *mp; |
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| 20 | xfs_pwork_work_fn work_fn; |
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| 21 | struct wait_queue_head poll_wait; |
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| 22 | atomic_t nr_work; |
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| 23 | int error; |
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| 24 | }; |
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| 25 | |
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| 26 | /* |
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| 27 | * Embed this parallel work control item inside your own work structure, |
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| 28 | * then queue work with it. |
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| 29 | */ |
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| 30 | struct xfs_pwork { |
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| 31 | struct work_struct work; |
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| 32 | struct xfs_pwork_ctl *pctl; |
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| 33 | }; |
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| 34 | |
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| 35 | #define XFS_PWORK_SINGLE_THREADED { .pctl = NULL } |
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| 36 | |
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| 37 | /* Have we been told to abort? */ |
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| 38 | static inline bool |
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| 39 | xfs_pwork_ctl_want_abort( |
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| 40 | struct xfs_pwork_ctl *pctl) |
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| 41 | { |
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| 42 | return pctl && pctl->error; |
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| 43 | } |
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| 44 | |
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| 45 | /* Have we been told to abort? */ |
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| 46 | static inline bool |
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| 47 | xfs_pwork_want_abort( |
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| 48 | struct xfs_pwork *pwork) |
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| 49 | { |
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| 50 | return xfs_pwork_ctl_want_abort(pctl: pwork->pctl); |
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| 51 | } |
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| 52 | |
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| 53 | int xfs_pwork_init(struct xfs_mount *mp, struct xfs_pwork_ctl *pctl, |
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| 54 | xfs_pwork_work_fn work_fn, const char *tag); |
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| 55 | void xfs_pwork_queue(struct xfs_pwork_ctl *pctl, struct xfs_pwork *pwork); |
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| 56 | int xfs_pwork_destroy(struct xfs_pwork_ctl *pctl); |
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| 57 | void xfs_pwork_poll(struct xfs_pwork_ctl *pctl); |
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| 58 | |
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| 59 | #endif /* __XFS_PWORK_H__ */ |
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| 60 | |
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