dm-thin-metadata.c File Reference

#include "dm-thin-metadata.h"
#include "persistent-data/dm-btree.h"
#include "persistent-data/dm-space-map.h"
#include "persistent-data/dm-space-map-disk.h"
#include "persistent-data/dm-transaction-manager.h"
#include <linux/list.h>
#include <linux/device-mapper.h>
#include <linux/workqueue.h>

Go to the source code of this file.

Data Structures
struct	thin_disk_superblock
struct	disk_device_details
struct	dm_pool_metadata
struct	dm_thin_device

Macros
#define	DM_MSG_PREFIX   "thin metadata"
#define	THIN_SUPERBLOCK_MAGIC   27022010
#define	THIN_SUPERBLOCK_LOCATION   0
#define	THIN_VERSION   1
#define	THIN_METADATA_CACHE_SIZE   64
#define	SECTOR_TO_BLOCK_SHIFT   3
#define	THIN_MAX_CONCURRENT_LOCKS   5
#define	SPACE_MAP_ROOT_SIZE   128
#define	SUPERBLOCK_CSUM_XOR   160774

Functions
struct dm_pool_metadata *	dm_pool_metadata_open (struct block_device *bdev, sector_t data_block_size, bool format_device)
int	dm_pool_metadata_close (struct dm_pool_metadata *pmd)
int	dm_pool_create_thin (struct dm_pool_metadata *pmd, dm_thin_id dev)
int	dm_pool_create_snap (struct dm_pool_metadata *pmd, dm_thin_id dev, dm_thin_id origin)
int	dm_pool_delete_thin_device (struct dm_pool_metadata *pmd, dm_thin_id dev)
int	dm_pool_set_metadata_transaction_id (struct dm_pool_metadata *pmd, uint64_t current_id, uint64_t new_id)
int	dm_pool_get_metadata_transaction_id (struct dm_pool_metadata *pmd, uint64_t *result)
int	dm_pool_reserve_metadata_snap (struct dm_pool_metadata *pmd)
int	dm_pool_release_metadata_snap (struct dm_pool_metadata *pmd)
int	dm_pool_get_metadata_snap (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_pool_open_thin_device (struct dm_pool_metadata *pmd, dm_thin_id dev, struct dm_thin_device **td)
int	dm_pool_close_thin_device (struct dm_thin_device *td)
dm_thin_id	dm_thin_dev_id (struct dm_thin_device *td)
int	dm_thin_find_block (struct dm_thin_device *td, dm_block_t block, int can_block, struct dm_thin_lookup_result *result)
int	dm_thin_insert_block (struct dm_thin_device *td, dm_block_t block, dm_block_t data_block)
int	dm_thin_remove_block (struct dm_thin_device *td, dm_block_t block)
bool	dm_thin_changed_this_transaction (struct dm_thin_device *td)
bool	dm_thin_aborted_changes (struct dm_thin_device *td)
int	dm_pool_alloc_data_block (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_pool_commit_metadata (struct dm_pool_metadata *pmd)
int	dm_pool_abort_metadata (struct dm_pool_metadata *pmd)
int	dm_pool_get_free_block_count (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_pool_get_free_metadata_block_count (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_pool_get_metadata_dev_size (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_pool_get_data_block_size (struct dm_pool_metadata *pmd, sector_t *result)
int	dm_pool_get_data_dev_size (struct dm_pool_metadata *pmd, dm_block_t *result)
int	dm_thin_get_mapped_count (struct dm_thin_device *td, dm_block_t *result)
int	dm_thin_get_highest_mapped_block (struct dm_thin_device *td, dm_block_t *result)
int	dm_pool_resize_data_dev (struct dm_pool_metadata *pmd, dm_block_t new_count)
void	dm_pool_metadata_read_only (struct dm_pool_metadata *pmd)

Variables
struct thin_disk_superblock	__packed

Macro Definition Documentation

#define DM_MSG_PREFIX   "thin metadata"

Definition at line 75 of file dm-thin-metadata.c.

#define SECTOR_TO_BLOCK_SHIFT   3

Definition at line 81 of file dm-thin-metadata.c.

#define SPACE_MAP_ROOT_SIZE   128

Definition at line 90 of file dm-thin-metadata.c.

#define SUPERBLOCK_CSUM_XOR   160774

Definition at line 215 of file dm-thin-metadata.c.

#define THIN_MAX_CONCURRENT_LOCKS   5

Definition at line 87 of file dm-thin-metadata.c.

#define THIN_METADATA_CACHE_SIZE   64

Definition at line 80 of file dm-thin-metadata.c.

#define THIN_SUPERBLOCK_LOCATION   0

Definition at line 78 of file dm-thin-metadata.c.

#define THIN_SUPERBLOCK_MAGIC   27022010

Definition at line 77 of file dm-thin-metadata.c.

#define THIN_VERSION   1

Definition at line 79 of file dm-thin-metadata.c.

Function Documentation

int dm_pool_abort_metadata

(

struct dm_pool_metadata *

pmd

)

Definition at line 1524 of file dm-thin-metadata.c.

int dm_pool_alloc_data_block	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1483 of file dm-thin-metadata.c.

int dm_pool_close_thin_device

(

struct dm_thin_device *

td

)

Definition at line 1338 of file dm-thin-metadata.c.

int dm_pool_commit_metadata

(

struct dm_pool_metadata *

pmd

)

Definition at line 1495 of file dm-thin-metadata.c.

int dm_pool_create_snap	(	struct dm_pool_metadata *	pmd,
		dm_thin_id	dev,
		dm_thin_id	origin
	)

Definition at line 1080 of file dm-thin-metadata.c.

int dm_pool_create_thin	(	struct dm_pool_metadata *	pmd,
		dm_thin_id	dev
	)

Definition at line 991 of file dm-thin-metadata.c.

int dm_pool_delete_thin_device	(	struct dm_pool_metadata *	pmd,
		dm_thin_id	dev
	)

Definition at line 1124 of file dm-thin-metadata.c.

int dm_pool_get_data_block_size	(	struct dm_pool_metadata *	pmd,
		sector_t *	result
	)

Definition at line 1582 of file dm-thin-metadata.c.

int dm_pool_get_data_dev_size	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1591 of file dm-thin-metadata.c.

int dm_pool_get_free_block_count	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1544 of file dm-thin-metadata.c.

int dm_pool_get_free_metadata_block_count	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1556 of file dm-thin-metadata.c.

int dm_pool_get_metadata_dev_size	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1569 of file dm-thin-metadata.c.

int dm_pool_get_metadata_snap	(	struct dm_pool_metadata *	pmd,
		dm_block_t *	result
	)

Definition at line 1312 of file dm-thin-metadata.c.

int dm_pool_get_metadata_transaction_id	(	struct dm_pool_metadata *	pmd,
		uint64_t *	result
	)

Definition at line 1162 of file dm-thin-metadata.c.

int dm_pool_metadata_close

(

struct dm_pool_metadata *

pmd

)

Definition at line 837 of file dm-thin-metadata.c.

struct dm_pool_metadata* dm_pool_metadata_open ( struct block_device *  bdev, sector_t  data_block_size, bool  format_device  )

read

Definition at line 800 of file dm-thin-metadata.c.

void dm_pool_metadata_read_only

(

struct dm_pool_metadata *

pmd

)

Definition at line 1680 of file dm-thin-metadata.c.

int dm_pool_open_thin_device	(	struct dm_pool_metadata *	pmd,
		dm_thin_id	dev,
		struct dm_thin_device **	td
	)

Definition at line 1325 of file dm-thin-metadata.c.

int dm_pool_release_metadata_snap

(

struct dm_pool_metadata *

pmd

)

Definition at line 1282 of file dm-thin-metadata.c.

int dm_pool_reserve_metadata_snap

(

struct dm_pool_metadata *

pmd

)

Definition at line 1236 of file dm-thin-metadata.c.

int dm_pool_resize_data_dev	(	struct dm_pool_metadata *	pmd,
		dm_block_t	new_count
	)

Definition at line 1668 of file dm-thin-metadata.c.

int dm_pool_set_metadata_transaction_id	(	struct dm_pool_metadata *	pmd,
		uint64_t	current_id,
		uint64_t	new_id
	)

Definition at line 1137 of file dm-thin-metadata.c.

bool dm_thin_aborted_changes

(

struct dm_thin_device *

td

)

Definition at line 1472 of file dm-thin-metadata.c.

bool dm_thin_changed_this_transaction

(

struct dm_thin_device *

td

)

Definition at line 1461 of file dm-thin-metadata.c.

dm_thin_id dm_thin_dev_id

(

struct dm_thin_device *

td

)

Definition at line 1347 of file dm-thin-metadata.c.

int dm_thin_find_block	(	struct dm_thin_device *	td,
		dm_block_t	block,
		int	can_block,
		struct dm_thin_lookup_result *	result
	)

Definition at line 1357 of file dm-thin-metadata.c.

int dm_thin_get_highest_mapped_block	(	struct dm_thin_device *	td,
		dm_block_t *	result
	)

Definition at line 1634 of file dm-thin-metadata.c.

int dm_thin_get_mapped_count	(	struct dm_thin_device *	td,
		dm_block_t *	result
	)

Definition at line 1603 of file dm-thin-metadata.c.

int dm_thin_insert_block	(	struct dm_thin_device *	td,
		dm_block_t	block,
		dm_block_t	data_block
	)

Definition at line 1420 of file dm-thin-metadata.c.

int dm_thin_remove_block	(	struct dm_thin_device *	td,
		dm_block_t	block
	)

Definition at line 1449 of file dm-thin-metadata.c.

Variable Documentation

struct disk_device_details __packed