fs/btrfs/async-thread.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2007 Oracle.  All rights reserved.
   4  * Copyright (C) 2014 Fujitsu.  All rights reserved.
   5  */
   6
   7 #ifndef BTRFS_ASYNC_THREAD_H
   8 #define BTRFS_ASYNC_THREAD_H
   9
  10 #include <linux/compiler_types.h>
  11 #include <linux/workqueue.h>
  12 #include <linux/list.h>
  13
  14 struct btrfs_fs_info;
  15 struct btrfs_workqueue;
  16 struct btrfs_work;
  17
  18 typedef void (*btrfs_func_t)(struct btrfs_work *arg);
  19 typedef void (*btrfs_ordered_func_t)(struct btrfs_work *arg, bool);
  20
  21 struct btrfs_work {
  22         btrfs_func_t func;
  23         btrfs_ordered_func_t ordered_func;
  24
  25         /* Don't touch things below */
  26         struct work_struct normal_work;
  27         struct list_head ordered_list;
  28         struct btrfs_workqueue *wq;
  29         unsigned long flags;
  30 };
  31
  32 struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info,
  33                                               const char *name,
  34                                               unsigned int flags,
  35                                               int limit_active,
  36                                               int thresh);
  37 struct btrfs_workqueue *btrfs_alloc_ordered_workqueue(
  38                                 struct btrfs_fs_info *fs_info, const char *name,
  39                                 unsigned int flags);
  40 void btrfs_init_work(struct btrfs_work *work, btrfs_func_t func,
  41                      btrfs_ordered_func_t ordered_func);
  42 void btrfs_queue_work(struct btrfs_workqueue *wq,
  43                       struct btrfs_work *work);
  44 void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
  45 void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
  46 struct btrfs_fs_info * __pure btrfs_work_owner(const struct btrfs_work *work);
  47 struct btrfs_fs_info * __pure btrfs_workqueue_owner(const struct btrfs_workqueue *wq);
  48 bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
  49 void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
  50
  51 #endif