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 #define BTRFS_WORK_HELPER_PROTO(name)					\
33 void btrfs_##name(struct work_struct *arg)
34 
35 BTRFS_WORK_HELPER_PROTO(worker_helper);
36 BTRFS_WORK_HELPER_PROTO(delalloc_helper);
37 BTRFS_WORK_HELPER_PROTO(flush_delalloc_helper);
38 BTRFS_WORK_HELPER_PROTO(cache_helper);
39 BTRFS_WORK_HELPER_PROTO(submit_helper);
40 BTRFS_WORK_HELPER_PROTO(fixup_helper);
41 BTRFS_WORK_HELPER_PROTO(endio_helper);
42 BTRFS_WORK_HELPER_PROTO(endio_meta_helper);
43 BTRFS_WORK_HELPER_PROTO(endio_meta_write_helper);
44 BTRFS_WORK_HELPER_PROTO(endio_raid56_helper);
45 BTRFS_WORK_HELPER_PROTO(endio_repair_helper);
46 BTRFS_WORK_HELPER_PROTO(rmw_helper);
47 BTRFS_WORK_HELPER_PROTO(endio_write_helper);
48 BTRFS_WORK_HELPER_PROTO(freespace_write_helper);
49 BTRFS_WORK_HELPER_PROTO(delayed_meta_helper);
50 BTRFS_WORK_HELPER_PROTO(readahead_helper);
51 BTRFS_WORK_HELPER_PROTO(qgroup_rescan_helper);
52 BTRFS_WORK_HELPER_PROTO(extent_refs_helper);
53 BTRFS_WORK_HELPER_PROTO(scrub_helper);
54 BTRFS_WORK_HELPER_PROTO(scrubwrc_helper);
55 BTRFS_WORK_HELPER_PROTO(scrubnc_helper);
56 BTRFS_WORK_HELPER_PROTO(scrubparity_helper);
57 
58 
59 struct btrfs_workqueue *btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info,
60 					      const char *name,
61 					      unsigned int flags,
62 					      int limit_active,
63 					      int thresh);
64 void btrfs_init_work(struct btrfs_work *work, btrfs_work_func_t helper,
65 		     btrfs_func_t func,
66 		     btrfs_func_t ordered_func,
67 		     btrfs_func_t ordered_free);
68 void btrfs_queue_work(struct btrfs_workqueue *wq,
69 		      struct btrfs_work *work);
70 void btrfs_destroy_workqueue(struct btrfs_workqueue *wq);
71 void btrfs_workqueue_set_max(struct btrfs_workqueue *wq, int max);
72 void btrfs_set_work_high_priority(struct btrfs_work *work);
73 struct btrfs_fs_info *btrfs_work_owner(const struct btrfs_work *work);
74 struct btrfs_fs_info *btrfs_workqueue_owner(const struct __btrfs_workqueue *wq);
75 bool btrfs_workqueue_normal_congested(const struct btrfs_workqueue *wq);
76 void btrfs_flush_workqueue(struct btrfs_workqueue *wq);
77 
78 #endif
79