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3bd94003 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
4cc96131 MS |
2 | /* |
3 | * Internal header file for device mapper | |
4 | * | |
5 | * Copyright (C) 2016 Red Hat, Inc. All rights reserved. | |
6 | * | |
7 | * This file is released under the LGPL. | |
8 | */ | |
9 | ||
10 | #ifndef DM_RQ_INTERNAL_H | |
11 | #define DM_RQ_INTERNAL_H | |
12 | ||
13 | #include <linux/bio.h> | |
14 | #include <linux/kthread.h> | |
15 | ||
16 | #include "dm-stats.h" | |
17 | ||
18 | struct mapped_device; | |
19 | ||
4cc96131 MS |
20 | /* |
21 | * For request-based dm - the bio clones we allocate are embedded in these | |
22 | * structs. | |
23 | * | |
24 | * We allocate these with bio_alloc_bioset, using the front_pad parameter when | |
25 | * the bioset is created - this means the bio has to come at the end of the | |
26 | * struct. | |
27 | */ | |
28 | struct dm_rq_clone_bio_info { | |
29 | struct bio *orig; | |
30 | struct dm_rq_target_io *tio; | |
31 | struct bio clone; | |
32 | }; | |
33 | ||
e83068a5 | 34 | int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t); |
4cc96131 MS |
35 | void dm_mq_cleanup_mapped_device(struct mapped_device *md); |
36 | ||
37 | void dm_start_queue(struct request_queue *q); | |
38 | void dm_stop_queue(struct request_queue *q); | |
39 | ||
e0c10752 MS |
40 | void dm_mq_kick_requeue_list(struct mapped_device *md); |
41 | ||
86a3238c | 42 | unsigned int dm_get_reserved_rq_based_ios(void); |
4cc96131 MS |
43 | |
44 | ssize_t dm_attr_rq_based_seq_io_merge_deadline_show(struct mapped_device *md, char *buf); | |
45 | ssize_t dm_attr_rq_based_seq_io_merge_deadline_store(struct mapped_device *md, | |
46 | const char *buf, size_t count); | |
47 | ||
48 | #endif |