1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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 | |
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 | |
34 | int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t); |
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 | |
40 | void dm_mq_kick_requeue_list(struct mapped_device *md); |
41 | |
42 | unsigned int dm_get_reserved_rq_based_ios(void); |
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 |
49 | |