drivers/md/dm-cache-block-types.h

Source file repositories/reference/linux-study-clean/drivers/md/dm-cache-block-types.h

File Facts

System
Linux kernel
Corpus path
drivers/md/dm-cache-block-types.h
Extension
.h
Size
1166 bytes
Lines
56
Domain
Driver Families
Bucket
drivers/md
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef DM_CACHE_BLOCK_TYPES_H
#define DM_CACHE_BLOCK_TYPES_H

#include "persistent-data/dm-block-manager.h"

/*----------------------------------------------------------------*/

/*
 * It's helpful to get sparse to differentiate between indexes into the
 * origin device, indexes into the cache device, and indexes into the
 * discard bitset.
 */

typedef dm_block_t __bitwise dm_oblock_t;
typedef uint32_t __bitwise dm_cblock_t;
typedef dm_block_t __bitwise dm_dblock_t;

static inline dm_oblock_t to_oblock(dm_block_t b)
{
	return (__force dm_oblock_t) b;
}

static inline dm_block_t from_oblock(dm_oblock_t b)
{
	return (__force dm_block_t) b;
}

static inline dm_cblock_t to_cblock(uint32_t b)
{
	return (__force dm_cblock_t) b;
}

static inline uint32_t from_cblock(dm_cblock_t b)
{
	return (__force uint32_t) b;
}

static inline dm_dblock_t to_dblock(dm_block_t b)
{
	return (__force dm_dblock_t) b;
}

static inline dm_block_t from_dblock(dm_dblock_t b)
{
	return (__force dm_block_t) b;
}

#endif /* DM_CACHE_BLOCK_TYPES_H */

Annotation

Implementation Notes