rtems-rfs-buffer.c File Reference

RTEMS File Systems Buffer Routines. More...

#include <sys/stat.h>
#include <inttypes.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <rtems/rfs/rtems-rfs-buffer.h>
#include <rtems/rfs/rtems-rfs-file-system.h>

Functions
int	rtems_rfs_buffer_handle_request (rtems_rfs_file_system *fs, rtems_rfs_buffer_handle *handle, rtems_rfs_buffer_block block, bool read)
int	rtems_rfs_buffer_handle_release (rtems_rfs_file_system *fs, rtems_rfs_buffer_handle *handle)
int	rtems_rfs_buffer_open (const char *name, rtems_rfs_file_system *fs)
int	rtems_rfs_buffer_close (rtems_rfs_file_system *fs)
int	rtems_rfs_buffer_sync (rtems_rfs_file_system *fs)
int	rtems_rfs_buffer_setblksize (rtems_rfs_file_system *fs, uint32_t size)
int	rtems_rfs_buffers_release (rtems_rfs_file_system *fs)

Detailed Description

RTEMS File Systems Buffer Routines.

Function Documentation

rtems_rfs_buffer_close()

int rtems_rfs_buffer_close

(

rtems_rfs_file_system *

fs

)

Close the buffer interface.

Parameters

[in]

fs

is the file system data.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffer_handle_release()

int rtems_rfs_buffer_handle_release	(	rtems_rfs_file_system *	fs,
		rtems_rfs_buffer_handle *	handle
	)

Release a buffer. If the buffer is dirty the buffer is written to disk. The result does not indicate if the data was successfully written to the disk as this operation may be performed in asynchronously to this release.

Parameters

[in]	fs	is the file system data.
[in]	handle	is the handle the requested buffer is attached to.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffer_handle_request()

int rtems_rfs_buffer_handle_request	(	rtems_rfs_file_system *	fs,
		rtems_rfs_buffer_handle *	handle,
		rtems_rfs_buffer_block	block,
		bool	read
	)

Request a buffer. The buffer can be filled with data from the media (read == true) or you can request a buffer to fill with data.

Parameters

[in]	fs	is the file system data.
[in]	handle	is the handle the requested buffer is attached to.
[in]	block	is the block number.
[in]	read	Read the data from the disk.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffer_open()

int rtems_rfs_buffer_open	(	const char *	name,
		rtems_rfs_file_system *	fs
	)

Open the buffer interface.

Parameters

[in]	name	is a pointer to the device name to the media.
[in]	fs	is the file system data.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffer_setblksize()

int rtems_rfs_buffer_setblksize	(	rtems_rfs_file_system *	fs,
		uint32_t	size
	)

Set the block size of the device.

Parameters

[in]	fs	is the file system data.
[in]	size	is the new block size.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffer_sync()

int rtems_rfs_buffer_sync

(

rtems_rfs_file_system *

fs

)

Sync all buffers to the media.

Parameters

[in]

fs

is the file system data.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_buffers_release()

int rtems_rfs_buffers_release

(

rtems_rfs_file_system *

fs

)

Release any chained buffers.

Parameters

[in]

fs

is the file system data.

Return values

0	Successful operation.
error_code	An error occurred.