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/workqueue.h>
11
12struct btrfs_fs_info;
13struct btrfs_workqueue;
14struct btrfs_work;
15typedef void (*btrfs_func_t)(struct btrfs_work *arg);
16typedef void (*btrfs_ordered_func_t)(struct btrfs_work *arg, bool);
17
18struct btrfs_work {
19 btrfs_func_t func;
20 btrfs_ordered_func_t ordered_func;
21
22 /* Don't touch things below */
23 struct work_struct normal_work;
24 struct list_head ordered_list;
25 struct btrfs_workqueue *wq;
26 unsigned long flags;
27};
28
29struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info,
30 const char *name,
31 unsigned int flags,
32 int limit_active,
33 int thresh);
34struct btrfs_workqueue *btrfs_alloc_ordered_workqueue(
35 struct btrfs_fs_info *fs_info, const char *name,
36 unsigned int flags);
37void btrfs_init_work(struct btrfs_work *work, btrfs_func_t func,
38 btrfs_ordered_func_t ordered_func);
39void btrfs_queue_work(struct btrfs_workqueue *wq,
40 struct btrfs_work *work);
41void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
42void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
43struct btrfs_fs_info * __pure btrfs_work_owner(const struct btrfs_work *work);
44struct btrfs_fs_info * __pure btrfs_workqueue_owner(const struct btrfs_workqueue *wq);
45bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
46void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
47
48#endif
49

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