Line data    Source code

       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 >11529*10^7 :         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 >11534*10^7 :         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__ */