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
14struct btrfs_fs_info;
15struct btrfs_workqueue;
16struct btrfs_work;
17
18typedef void (*btrfs_func_t)(struct btrfs_work *arg);
19typedef void (*btrfs_ordered_func_t)(struct btrfs_work *arg, bool);
20
21struct 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
32struct 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);
37struct btrfs_workqueue *btrfs_alloc_ordered_workqueue(
38 struct btrfs_fs_info *fs_info, const char *name,
39 unsigned int flags);
40void btrfs_init_work(struct btrfs_work *work, btrfs_func_t func,
41 btrfs_ordered_func_t ordered_func);
42void btrfs_queue_work(struct btrfs_workqueue *wq,
43 struct btrfs_work *work);
44void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
45void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
46struct btrfs_fs_info * __pure btrfs_work_owner(const struct btrfs_work *work);
47struct btrfs_fs_info * __pure btrfs_workqueue_owner(const struct btrfs_workqueue *wq);
48bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
49void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
50
51#endif
52

source code of linux/fs/btrfs/async-thread.h