Commit | Line | Data |
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4cc96131 MS |
1 | /* |
2 | * Internal header file for device mapper | |
3 | * | |
4 | * Copyright (C) 2016 Red Hat, Inc. All rights reserved. | |
5 | * | |
6 | * This file is released under the LGPL. | |
7 | */ | |
8 | ||
9 | #ifndef DM_RQ_INTERNAL_H | |
10 | #define DM_RQ_INTERNAL_H | |
11 | ||
12 | #include <linux/bio.h> | |
13 | #include <linux/kthread.h> | |
14 | ||
15 | #include "dm-stats.h" | |
16 | ||
17 | struct mapped_device; | |
18 | ||
19 | /* | |
20 | * One of these is allocated per request. | |
21 | */ | |
22 | struct dm_rq_target_io { | |
23 | struct mapped_device *md; | |
24 | struct dm_target *ti; | |
25 | struct request *orig, *clone; | |
26 | struct kthread_work work; | |
2a842aca | 27 | blk_status_t error; |
4cc96131 MS |
28 | union map_info info; |
29 | struct dm_stats_aux stats_aux; | |
30 | unsigned long duration_jiffies; | |
31 | unsigned n_sectors; | |
dc6364b5 | 32 | unsigned completed; |
4cc96131 MS |
33 | }; |
34 | ||
35 | /* | |
36 | * For request-based dm - the bio clones we allocate are embedded in these | |
37 | * structs. | |
38 | * | |
39 | * We allocate these with bio_alloc_bioset, using the front_pad parameter when | |
40 | * the bioset is created - this means the bio has to come at the end of the | |
41 | * struct. | |
42 | */ | |
43 | struct dm_rq_clone_bio_info { | |
44 | struct bio *orig; | |
45 | struct dm_rq_target_io *tio; | |
46 | struct bio clone; | |
47 | }; | |
48 | ||
e83068a5 | 49 | int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t); |
4cc96131 MS |
50 | void dm_mq_cleanup_mapped_device(struct mapped_device *md); |
51 | ||
52 | void dm_start_queue(struct request_queue *q); | |
53 | void dm_stop_queue(struct request_queue *q); | |
54 | ||
e0c10752 MS |
55 | void dm_mq_kick_requeue_list(struct mapped_device *md); |
56 | ||
4cc96131 MS |
57 | unsigned dm_get_reserved_rq_based_ios(void); |
58 | ||
59 | ssize_t dm_attr_rq_based_seq_io_merge_deadline_show(struct mapped_device *md, char *buf); | |
60 | ssize_t dm_attr_rq_based_seq_io_merge_deadline_store(struct mapped_device *md, | |
61 | const char *buf, size_t count); | |
62 | ||
63 | #endif |