rawdisk

Access to disk blocks at raw level. More...

Functions
void	soOpenRawDisk (const char *devname, uint32_t *np=NULL)
	Open the storage device. More...
void	soCloseRawDisk (void)
	Close the storage device. More...
void	soReadRawBlock (uint32_t n, void *buf)
	Read a block of data from the storage device. More...
void	soWriteRawBlock (uint32_t n, void *buf)
	Write a block of data from the storage device. More...

Detailed Description

Access to disk blocks at raw level.

Remarks

In case an error occurs, every function throws an error code (an int)

Function Documentation

soOpenRawDisk()

void sofs19::soOpenRawDisk	(	const char *	devname,
		uint32_t *	np = NULL
	)

Open the storage device.

A communication channel is established with the storage device. It is supposed that no communication channel was previously established. The storage file must exist and have a size multiple of the block size.

Parameters

[in]	devname	absolute path to the Linux file that simulates the storage device
[out]	np	if not null, pointer to a location where the number of blocks of the device is to be stored

soCloseRawDisk()

void sofs19::soCloseRawDisk

(

void

)

Close the storage device.

The communication channel previously established with the storage device is closed.

soReadRawBlock()

void sofs19::soReadRawBlock	(	uint32_t	n,
		void *	buf
	)

Read a block of data from the storage device.

Parameters

[in]	n	physical number of the data block to be read from
[out]	buf	pointer to the buffer where the data must be read into

soWriteRawBlock()

void sofs19::soWriteRawBlock	(	uint32_t	n,
		void *	buf
	)

Write a block of data from the storage device.

Parameters

[in]	n	physical number of the block to be written into
[in]	buf	pointer to the buffer containing the data to be written from