sys/dmu_zfetch.h File Reference

#include <sys/zfs_context.h>

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Data Structures
struct	zstream
struct	zfetch
Typedefs
typedef enum zfetch_dirn	zfetch_dirn_t
	so we can reference dnode
typedef struct zstream	zstream_t
typedef struct zfetch	zfetch_t
Enumerations
enum	zfetch_dirn { ZFETCH_FORWARD = 1, ZFETCH_BACKWARD = -1 }
	so we can reference dnode More...
Functions
void	zfetch_init (void)
void	zfetch_fini (void)
void	dmu_zfetch_init (zfetch_t *, struct dnode *)
	Sets up a zfetch data based on an associated dnode.
void	dmu_zfetch_rele (zfetch_t *)
	Clean-up state associated with a zfetch structure.
void	dmu_zfetch (zfetch_t *, uint64_t, uint64_t, int)
	This is the prefetch entry point.
Variables
uint64_t	zfetch_array_rd_sz
	number of bytes in a array_read at which we stop prefetching (1Mb)

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Typedef Documentation

typedef enum zfetch_dirn zfetch_dirn_t

so we can reference dnode

typedef struct zfetch zfetch_t

typedef struct zstream zstream_t

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Enumeration Type Documentation

enum zfetch_dirn

so we can reference dnode

Enumerator:

ZFETCH_FORWARD	prefetch increasing block numbers
ZFETCH_BACKWARD	prefetch decreasing block numbers

Definition at line 39 of file dmu_zfetch.h.

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Function Documentation

void dmu_zfetch	(	zfetch_t *	zf,
		uint64_t	offset,
		uint64_t	size,
		int	prefetched
	)

This is the prefetch entry point.

It calls all of the other dmu_zfetch routines to create, delete, find, or operate upon prefetch streams.

Definition at line 675 of file dmu_zfetch.c.

void dmu_zfetch_init	(	zfetch_t *	zf,
		dnode_t *	dno
	)

Sets up a zfetch data based on an associated dnode.

This takes a pointer to a zfetch structure and a dnode. It performs the necessary setup for the zfetch structure, grokking data from the associated dnode.

Definition at line 286 of file dmu_zfetch.c.

void dmu_zfetch_rele

(

zfetch_t *

zf

)

Clean-up state associated with a zfetch structure.

This frees allocated structure members, empties the zf_stream tree, and generally makes things nice. This doesn't free the zfetch_t itself, that's left to the caller.

Definition at line 552 of file dmu_zfetch.c.

void zfetch_fini

(

void

)

Definition at line 270 of file dmu_zfetch.c.

void zfetch_init

(

void

)

Definition at line 256 of file dmu_zfetch.c.