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 
12 struct btrfs_fs_info;
13 struct btrfs_workqueue;
14 /* Internal use only */
15 struct __btrfs_workqueue;
16 struct btrfs_work;
17 typedef void (*btrfs_func_t)(struct btrfs_work *arg);
18 typedef void (*btrfs_work_func_t)(struct work_struct *arg);
19 
20 struct btrfs_work {
21 	btrfs_func_t func;
22 	btrfs_func_t ordered_func;
23 	btrfs_func_t ordered_free;
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 void btrfs_init_work(struct btrfs_work *work, btrfs_func_t func,
38 		     btrfs_func_t ordered_func, btrfs_func_t ordered_free);
39 void btrfs_queue_work(struct btrfs_workqueue *wq,
40 		      struct btrfs_work *work);
41 void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
42 void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
43 void btrfs_set_work_high_priority(struct btrfs_work *work);
44 struct btrfs_fs_info * __pure btrfs_work_owner(const struct btrfs_work *work);
45 struct btrfs_fs_info * __pure btrfs_workqueue_owner(const struct __btrfs_workqueue *wq);
46 bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
47 void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
48 
49 #endif
50