wl.c File Reference

#include <linux/slab.h>
#include <linux/crc32.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
#include "ubi.h"

Go to the source code of this file.

Macros
#define	WL_RESERVED_PEBS   1
#define	UBI_WL_THRESHOLD   CONFIG_MTD_UBI_WL_THRESHOLD
#define	WL_FREE_MAX_DIFF   (2*UBI_WL_THRESHOLD)
#define	WL_MAX_FAILURES   32

Functions
int	ubi_wl_get_peb (struct ubi_device *ubi)
int	ubi_wl_put_peb (struct ubi_device *ubi, int vol_id, int lnum, int pnum, int torture)
int	ubi_wl_scrub_peb (struct ubi_device *ubi, int pnum)
int	ubi_wl_flush (struct ubi_device *ubi, int vol_id, int lnum)
int	ubi_thread (void *u)
int	ubi_wl_init (struct ubi_device *ubi, struct ubi_attach_info *ai)
void	ubi_wl_close (struct ubi_device *ubi)

Macro Definition Documentation

#define UBI_WL_THRESHOLD   CONFIG_MTD_UBI_WL_THRESHOLD

Definition at line 117 of file wl.c.

#define WL_FREE_MAX_DIFF   (2*UBI_WL_THRESHOLD)

Definition at line 130 of file wl.c.

#define WL_MAX_FAILURES   32

Definition at line 136 of file wl.c.

#define WL_RESERVED_PEBS   1

Definition at line 109 of file wl.c.

Function Documentation

int ubi_thread

(

void *

u

)

ubi_thread - UBI background thread. : the UBI device description object pointer

Definition at line 1790 of file wl.c.

void ubi_wl_close

(

struct ubi_device *

ubi

)

ubi_wl_close - close the wear-leveling sub-system. : UBI device description object

Definition at line 2025 of file wl.c.

int ubi_wl_flush	(	struct ubi_device *	ubi,
		int	vol_id,
		int	lnum
	)

ubi_wl_flush - flush all pending works. : UBI device description object : the volume id to flush for : the logical eraseblock number to flush for

This function executes all pending works for a particular volume id / logical eraseblock number pair. If either value is set to UBI_ALL, then it acts as a wildcard for all of the corresponding volume numbers or logical eraseblock numbers. It returns zero in case of success and a negative error code in case of failure.

Definition at line 1704 of file wl.c.

int ubi_wl_get_peb

(

struct ubi_device *

ubi

)

Definition at line 684 of file wl.c.

int ubi_wl_init	(	struct ubi_device *	ubi,
		struct ubi_attach_info *	ai
	)

ubi_wl_init - initialize the WL sub-system using attaching information. : UBI device description object : attaching information

This function returns zero in case of success, and a negative error code in case of failure.

Definition at line 1868 of file wl.c.

int ubi_wl_put_peb	(	struct ubi_device *	ubi,
		int	vol_id,
		int	lnum,
		int	pnum,
		int	torture
	)

ubi_wl_put_peb - return a PEB to the wear-leveling sub-system. : UBI device description object : the volume ID that last used this PEB : the last used logical eraseblock number for the PEB : physical eraseblock to return : if this physical eraseblock has to be tortured

This function is called to return physical eraseblock to the pool of free physical eraseblocks. The flag has to be set if an I/O error occurred to this and it has to be tested. This function returns zero in case of success, and a negative error code in case of failure.

Definition at line 1552 of file wl.c.

int ubi_wl_scrub_peb	(	struct ubi_device *	ubi,
		int	pnum
	)

ubi_wl_scrub_peb - schedule a physical eraseblock for scrubbing. : UBI device description object : the physical eraseblock to schedule

If a bit-flip in a physical eraseblock is detected, this physical eraseblock needs scrubbing. This function schedules a physical eraseblock for scrubbing which is done in background. This function returns zero in case of success and a negative error code in case of failure.

Definition at line 1639 of file wl.c.