rtems-rfs-group.c File Reference

RTEMS File Systems Group RoutinesThese functions open and close a group as well as manage bit allocations within a group. More...

#include <inttypes.h>
#include <string.h>
#include <rtems/rfs/rtems-rfs-file-system.h>
#include <rtems/rfs/rtems-rfs-group.h>

Functions
int	rtems_rfs_group_open (rtems_rfs_file_system *fs, rtems_rfs_buffer_block base, size_t size, size_t inodes, rtems_rfs_group *group)
	Open a group. More...
int	rtems_rfs_group_close (rtems_rfs_file_system *fs, rtems_rfs_group *group)
	Close a group. More...
int	rtems_rfs_group_bitmap_alloc (rtems_rfs_file_system *fs, rtems_rfs_bitmap_bit goal, bool inode, rtems_rfs_bitmap_bit *result)
	Allocate an inode or block. More...
int	rtems_rfs_group_bitmap_free (rtems_rfs_file_system *fs, bool inode, rtems_rfs_bitmap_bit no)
	Free the group allocated bit. More...
int	rtems_rfs_group_bitmap_test (rtems_rfs_file_system *fs, bool inode, rtems_rfs_bitmap_bit no, bool *state)
	Test the group allocated bit. More...
int	rtems_rfs_group_usage (rtems_rfs_file_system *fs, size_t *blocks, size_t *inodes)
	Determine the number of blocks and inodes used. More...

Detailed Description

RTEMS File Systems Group Routines

These functions open and close a group as well as manage bit allocations within a group.

Function Documentation

rtems_rfs_group_bitmap_alloc()

int rtems_rfs_group_bitmap_alloc	(	rtems_rfs_file_system *	fs,
		rtems_rfs_bitmap_bit	goal,
		bool	inode,
		rtems_rfs_bitmap_bit *	result
	)

Allocate an inode or block.

The groups are searched to find the next available inode or block.

Parameters

fs	The file system data.
goal	The goal to seed the bitmap search.
inode	If true allocate an inode else allocate a block.
result	The allocated bit in the bitmap.

Return values

int	The error number (errno). No error if 0.

rtems_rfs_group_bitmap_free()

int rtems_rfs_group_bitmap_free	(	rtems_rfs_file_system *	fs,
		bool	inode,
		rtems_rfs_bitmap_bit	no
	)

Free the group allocated bit.

Parameters

fs	The file system data.
inode	If true the number to free is an inode else it is a block.
block	The inode or block number to free.

Return values

int	The error number (errno). No error if 0.

rtems_rfs_group_bitmap_test()

int rtems_rfs_group_bitmap_test	(	rtems_rfs_file_system *	fs,
		bool	inode,
		rtems_rfs_bitmap_bit	no,
		bool *	state
	)

Test the group allocated bit.

Parameters

fs	The file system data.
inode	If true the number to free is an inode else it is a block.
block	The inode or block number to free.
state	Return the state of the bit.

Return values

int	The error number (errno). No error if 0.

rtems_rfs_group_close()

int rtems_rfs_group_close	(	rtems_rfs_file_system *	fs,
		rtems_rfs_group *	group
	)

Close a group.

Release all resources the group holds.

Parameters

fs	The file system.
group	The group to close.

Return values

int	The error number (errno). No error if 0.

rtems_rfs_group_open()

int rtems_rfs_group_open	(	rtems_rfs_file_system *	fs,
		rtems_rfs_buffer_block	base,
		size_t	size,
		size_t	inodes,
		rtems_rfs_group *	group
	)

Open a group.

Allocate all the resources including the bitmaps.

Parameters

fs	The file system.
base	The base block number.
size	The number of blocks in the group.
group	Reference to the group to open.

Return values

int	The error number (errno). No error if 0.

rtems_rfs_group_usage()

int rtems_rfs_group_usage	(	rtems_rfs_file_system *	fs,
		size_t *	blocks,
		size_t *	inodes
	)

Determine the number of blocks and inodes used.

Parameters

fs	The file system data.
blocks	The number of blocks used.
inodes	The number of inodes used.

Return values

int	The error number (errno). No error if 0.