blob: f0020d21b95fcd52f9843ee4045cb11c3253a3dc [file] [log] [blame]
* Internal header file for device mapper
* Copyright (C) 2016 Red Hat, Inc. All rights reserved.
* This file is released under the LGPL.
#include <linux/bio.h>
#include <linux/kthread.h>
#include "dm-stats.h"
struct mapped_device;
* One of these is allocated per request.
struct dm_rq_target_io {
struct mapped_device *md;
struct dm_target *ti;
struct request *orig, *clone;
struct kthread_work work;
int error;
union map_info info;
struct dm_stats_aux stats_aux;
unsigned long duration_jiffies;
unsigned n_sectors;
* For request-based dm - the bio clones we allocate are embedded in these
* structs.
* We allocate these with bio_alloc_bioset, using the front_pad parameter when
* the bioset is created - this means the bio has to come at the end of the
* struct.
struct dm_rq_clone_bio_info {
struct bio *orig;
struct dm_rq_target_io *tio;
struct bio clone;
bool dm_use_blk_mq_default(void);
bool dm_use_blk_mq(struct mapped_device *md);
int dm_old_init_request_queue(struct mapped_device *md, struct dm_table *t);
int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t);
void dm_mq_cleanup_mapped_device(struct mapped_device *md);
void dm_start_queue(struct request_queue *q);
void dm_stop_queue(struct request_queue *q);
void dm_mq_kick_requeue_list(struct mapped_device *md);
unsigned dm_get_reserved_rq_based_ios(void);
ssize_t dm_attr_rq_based_seq_io_merge_deadline_show(struct mapped_device *md, char *buf);
ssize_t dm_attr_rq_based_seq_io_merge_deadline_store(struct mapped_device *md,
const char *buf, size_t count);