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