dm-region-hash.c File Reference

#include <linux/dm-dirty-log.h>
#include <linux/dm-region-hash.h>
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include "dm.h"

Go to the source code of this file.

Data Structures
struct	dm_region_hash
struct	dm_region

Macros
#define	DM_MSG_PREFIX   "region hash"
#define	RH_HASH_MULT   2654435387U
#define	RH_HASH_SHIFT   12
#define	MIN_REGIONS   64

Functions
sector_t	dm_rh_region_to_sector (struct dm_region_hash *rh, region_t region)
	EXPORT_SYMBOL_GPL (dm_rh_region_to_sector)
region_t	dm_rh_bio_to_region (struct dm_region_hash *rh, struct bio *bio)
	EXPORT_SYMBOL_GPL (dm_rh_bio_to_region)
void *	dm_rh_region_context (struct dm_region *reg)
	EXPORT_SYMBOL_GPL (dm_rh_region_context)
region_t	dm_rh_get_region_key (struct dm_region *reg)
	EXPORT_SYMBOL_GPL (dm_rh_get_region_key)
sector_t	dm_rh_get_region_size (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_get_region_size)
struct dm_region_hash *	dm_region_hash_create (void *context, void(*dispatch_bios)(void *context, struct bio_list *bios), void(*wakeup_workers)(void *context), void(*wakeup_all_recovery_waiters)(void *context), sector_t target_begin, unsigned max_recovery, struct dm_dirty_log *log, uint32_t region_size, region_t nr_regions)
	EXPORT_SYMBOL_GPL (dm_region_hash_create)
void	dm_region_hash_destroy (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_region_hash_destroy)
struct dm_dirty_log *	dm_rh_dirty_log (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_dirty_log)
int	dm_rh_get_state (struct dm_region_hash *rh, region_t region, int may_block)
	EXPORT_SYMBOL_GPL (dm_rh_get_state)
void	dm_rh_mark_nosync (struct dm_region_hash *rh, struct bio *bio)
	EXPORT_SYMBOL_GPL (dm_rh_mark_nosync)
void	dm_rh_update_states (struct dm_region_hash *rh, int errors_handled)
	EXPORT_SYMBOL_GPL (dm_rh_update_states)
void	dm_rh_inc_pending (struct dm_region_hash *rh, struct bio_list *bios)
	EXPORT_SYMBOL_GPL (dm_rh_inc_pending)
void	dm_rh_dec (struct dm_region_hash *rh, region_t region)
	EXPORT_SYMBOL_GPL (dm_rh_dec)
void	dm_rh_recovery_prepare (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_recovery_prepare)
struct dm_region *	dm_rh_recovery_start (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_recovery_start)
void	dm_rh_recovery_end (struct dm_region *reg, int success)
	EXPORT_SYMBOL_GPL (dm_rh_recovery_end)
int	dm_rh_recovery_in_flight (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_recovery_in_flight)
int	dm_rh_flush (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_flush)
void	dm_rh_delay (struct dm_region_hash *rh, struct bio *bio)
	EXPORT_SYMBOL_GPL (dm_rh_delay)
void	dm_rh_stop_recovery (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_stop_recovery)
void	dm_rh_start_recovery (struct dm_region_hash *rh)
	EXPORT_SYMBOL_GPL (dm_rh_start_recovery)
	MODULE_DESCRIPTION (DM_NAME" region hash")
	MODULE_AUTHOR ("Joe Thornber/Heinz Mauelshagen <[email protected]>")
	MODULE_LICENSE ("GPL")

Macro Definition Documentation

#define DM_MSG_PREFIX   "region hash"

Definition at line 19 of file dm-region-hash.c.

#define MIN_REGIONS   64

Definition at line 158 of file dm-region-hash.c.

#define RH_HASH_MULT   2654435387U

Definition at line 155 of file dm-region-hash.c.

#define RH_HASH_SHIFT   12

Definition at line 156 of file dm-region-hash.c.

Function Documentation

struct dm_region_hash* dm_region_hash_create ( void *  context, void(*)(void *context, struct bio_list *bios)  dispatch_bios, void(*)(void *context)  wakeup_workers, void(*)(void *context)  wakeup_all_recovery_waiters, sector_t  target_begin, unsigned  max_recovery, struct dm_dirty_log *  log, uint32_t  region_size, region_t  nr_regions  )

read

Definition at line 159 of file dm-region-hash.c.

void dm_region_hash_destroy

(

struct dm_region_hash *

rh

)

Definition at line 234 of file dm-region-hash.c.

region_t dm_rh_bio_to_region	(	struct dm_region_hash *	rh,
		struct bio *	bio
	)

Definition at line 127 of file dm-region-hash.c.

void dm_rh_dec	(	struct dm_region_hash *	rh,
		region_t	region
	)

Definition at line 537 of file dm-region-hash.c.

void dm_rh_delay	(	struct dm_region_hash *	rh,
		struct bio *	bio
	)

Definition at line 689 of file dm-region-hash.c.

struct dm_dirty_log* dm_rh_dirty_log ( struct dm_region_hash *  rh )

read

Definition at line 259 of file dm-region-hash.c.

int dm_rh_flush

(

struct dm_region_hash *

rh

)

Definition at line 683 of file dm-region-hash.c.

region_t dm_rh_get_region_key

(

struct dm_region *

reg

)

Definition at line 139 of file dm-region-hash.c.

sector_t dm_rh_get_region_size

(

struct dm_region_hash *

rh

)

Definition at line 145 of file dm-region-hash.c.

int dm_rh_get_state	(	struct dm_region_hash *	rh,
		region_t	region,
		int	may_block
	)

Definition at line 337 of file dm-region-hash.c.

void dm_rh_inc_pending	(	struct dm_region_hash *	rh,
		struct bio_list *	bios
	)

Definition at line 525 of file dm-region-hash.c.

void dm_rh_mark_nosync	(	struct dm_region_hash *	rh,
		struct bio *	bio
	)

Definition at line 394 of file dm-region-hash.c.

void dm_rh_recovery_end	(	struct dm_region *	reg,
		int	success
	)

Definition at line 660 of file dm-region-hash.c.

int dm_rh_recovery_in_flight

(

struct dm_region_hash *

rh

)

Definition at line 677 of file dm-region-hash.c.

void dm_rh_recovery_prepare

(

struct dm_region_hash *

rh

)

Definition at line 621 of file dm-region-hash.c.

struct dm_region* dm_rh_recovery_start ( struct dm_region_hash *  rh )

read

Definition at line 644 of file dm-region-hash.c.

void* dm_rh_region_context

(

struct dm_region *

reg

)

Definition at line 133 of file dm-region-hash.c.

sector_t dm_rh_region_to_sector	(	struct dm_region_hash *	rh,
		region_t	region
	)

Definition at line 121 of file dm-region-hash.c.

void dm_rh_start_recovery

(

struct dm_region_hash *

rh

)

Definition at line 710 of file dm-region-hash.c.

void dm_rh_stop_recovery

(

struct dm_region_hash *

rh

)

Definition at line 700 of file dm-region-hash.c.

void dm_rh_update_states	(	struct dm_region_hash *	rh,
		int	errors_handled
	)

Definition at line 439 of file dm-region-hash.c.

EXPORT_SYMBOL_GPL

(

dm_rh_region_to_sector

)

EXPORT_SYMBOL_GPL

(

dm_rh_bio_to_region

)

EXPORT_SYMBOL_GPL

(

dm_rh_region_context

)

EXPORT_SYMBOL_GPL

(

dm_rh_get_region_key

)

EXPORT_SYMBOL_GPL

(

dm_rh_get_region_size

)

EXPORT_SYMBOL_GPL

(

dm_region_hash_create

)

EXPORT_SYMBOL_GPL

(

dm_region_hash_destroy

)

EXPORT_SYMBOL_GPL

(

dm_rh_dirty_log

)

EXPORT_SYMBOL_GPL

(

dm_rh_get_state

)

EXPORT_SYMBOL_GPL

(

dm_rh_mark_nosync

)

EXPORT_SYMBOL_GPL

(

dm_rh_update_states

)

EXPORT_SYMBOL_GPL

(

dm_rh_inc_pending

)

EXPORT_SYMBOL_GPL

(

dm_rh_dec

)

EXPORT_SYMBOL_GPL

(

dm_rh_recovery_prepare

)

EXPORT_SYMBOL_GPL

(

dm_rh_recovery_start

)

EXPORT_SYMBOL_GPL

(

dm_rh_recovery_end

)

EXPORT_SYMBOL_GPL

(

dm_rh_recovery_in_flight

)

EXPORT_SYMBOL_GPL

(

dm_rh_flush

)

EXPORT_SYMBOL_GPL

(

dm_rh_delay

)

EXPORT_SYMBOL_GPL

(

dm_rh_stop_recovery

)

EXPORT_SYMBOL_GPL

(

dm_rh_start_recovery

)

MODULE_AUTHOR

(

"Joe Thornber/Heinz Mauelshagen <[email protected]>"

)

MODULE_DESCRIPTION

(

DM_NAME" region hash"

)

MODULE_LICENSE

(

"GPL"

)