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
52
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