rtems-rfs-inode.c File Reference

RTEMS File Systems Inode RoutinesThese functions manage inodes in the RFS file system. An inode is part of a block that reside after the bitmaps in the group. More...

#include <inttypes.h>
#include <string.h>
#include <rtems/rfs/rtems-rfs-block.h>
#include <rtems/rfs/rtems-rfs-file-system.h>
#include <rtems/rfs/rtems-rfs-inode.h>
#include <rtems/rfs/rtems-rfs-dir.h>

Functions
int	rtems_rfs_inode_alloc (rtems_rfs_file_system *fs, rtems_rfs_bitmap_bit goal, rtems_rfs_ino *ino)
int	rtems_rfs_inode_free (rtems_rfs_file_system *fs, rtems_rfs_ino ino)
int	rtems_rfs_inode_open (rtems_rfs_file_system *fs, rtems_rfs_ino ino, rtems_rfs_inode_handle *handle, bool load)
int	rtems_rfs_inode_close (rtems_rfs_file_system *fs, rtems_rfs_inode_handle *handle)
int	rtems_rfs_inode_load (rtems_rfs_file_system *fs, rtems_rfs_inode_handle *handle)
int	rtems_rfs_inode_unload (rtems_rfs_file_system *fs, rtems_rfs_inode_handle *handle, bool update_ctime)
int	rtems_rfs_inode_create (rtems_rfs_file_system *fs, rtems_rfs_ino parent, const char *name, size_t length, uint16_t mode, uint16_t links, uid_t uid, gid_t gid, rtems_rfs_ino *ino)
int	rtems_rfs_inode_delete (rtems_rfs_file_system *fs, rtems_rfs_inode_handle *handle)
int	rtems_rfs_inode_initialise (rtems_rfs_inode_handle *handle, uint16_t links, uint16_t mode, uid_t uid, gid_t gid)
int	rtems_rfs_inode_time_stamp_now (rtems_rfs_inode_handle *handle, bool atime, bool mtime)
rtems_rfs_pos	rtems_rfs_inode_get_size (rtems_rfs_file_system *fs, rtems_rfs_inode_handle *handle)

Detailed Description

RTEMS File Systems Inode Routines

These functions manage inodes in the RFS file system. An inode is part of a block that reside after the bitmaps in the group.

Function Documentation

rtems_rfs_inode_alloc()

int rtems_rfs_inode_alloc	(	rtems_rfs_file_system *	fs,
		rtems_rfs_bitmap_bit	goal,
		rtems_rfs_ino *	ino
	)

Allocate an inode number and return it.

Parameters

[in]	fs	is the file system data.
[out]	ino	will contain the ino.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_close()

int rtems_rfs_inode_close	(	rtems_rfs_file_system *	fs,
		rtems_rfs_inode_handle *	handle
	)

The close inode handle. All opened inodes need to be closed.

Parameters

[in]	fs	is the file system.
[in]	handle	is the handle to close.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_create()

int rtems_rfs_inode_create	(	rtems_rfs_file_system *	fs,
		rtems_rfs_ino	parent,
		const char *	name,
		size_t	length,
		uint16_t	mode,
		uint16_t	links,
		uid_t	uid,
		gid_t	gid,
		rtems_rfs_ino *	ino
	)

Create an inode allocating, initialising and adding an entry to the parent directory.

Parameters

[in]	fs	is the file system data.
[in]	parent	is the parent inode number to add the directory entry to.
[in]	name	is a pointer to the name of the directory entryinode to create.

rtems_rfs_inode_delete()

int rtems_rfs_inode_delete	(	rtems_rfs_file_system *	fs,
		rtems_rfs_inode_handle *	handle
	)

Delete the inode eraseing it and release the buffer to commit the write. You need to load the inode again if you wish to use it again.

Parameters

[in]	fs	is the file system.
[in]	handle	is the inode handle to erase.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_free()

int rtems_rfs_inode_free	(	rtems_rfs_file_system *	fs,
		rtems_rfs_ino	ino
	)

Free an inode.

Parameters

[in]	fs	is the file system data.
[in]	ino	is the ino too free.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_get_size()

rtems_rfs_pos rtems_rfs_inode_get_size	(	rtems_rfs_file_system *	fs,
		rtems_rfs_inode_handle *	handle
	)

Calculate the size of data attached to the inode.

Parameters

[in]	fs	is the file system data.
[in]	handle	is the inode handle.

Return values

size	The data size in bytes in the block map attched to the inode.

rtems_rfs_inode_initialise()

int rtems_rfs_inode_initialise	(	rtems_rfs_inode_handle *	handle,
		uint16_t	links,
		uint16_t	mode,
		uid_t	uid,
		gid_t	gid
	)

Initialise a new inode.

Parameters

[in]	handle	is the inode handle to initialise.
[in]	links	are the number of links to the inode.
[in]	mode	is the inode mode.
[in]	uid	is the user id.
[in]	gid	is the group id.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_load()

int rtems_rfs_inode_load	(	rtems_rfs_file_system *	fs,
		rtems_rfs_inode_handle *	handle
	)

Load the inode into memory.

Parameters

[in]	fs	is the file system.
[in]	handle	is the inode handle to load.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_open()

int rtems_rfs_inode_open	(	rtems_rfs_file_system *	fs,
		rtems_rfs_ino	ino,
		rtems_rfs_inode_handle *	handle,
		bool	load
	)

Open the inode handle. This reads the inode into the buffer and sets the data pointer. All data is in media byte order and needs to be accessed via the supporting calls.

Parameters

[in]	fs	is the file system.
[in]	ino	is the inode number.
[in]	handle	is the handle to the inode we are opening.
[in]	load	If true load the inode into memory from the media.

Return values

0	Successful operation.
error_code	An error occurred.

rtems_rfs_inode_time_stamp_now()

int rtems_rfs_inode_time_stamp_now	(	rtems_rfs_inode_handle *	handle,
		bool	atime,
		bool	mtime
	)

Time stamp the inode with the current time. The ctime field is hanlded automatically.

Parameters

[in]	handle	is the inode handle.
[in]	atime	Update the atime field.
[in]	mtime	UPdate the mtime field.

Return values

0	Successful operation.
ENXIO	No inode is loaded.
error_code	An error occurred.

rtems_rfs_inode_unload()

int rtems_rfs_inode_unload	(	rtems_rfs_file_system *	fs,
		rtems_rfs_inode_handle *	handle,
		bool	update_ctime
	)

Unload the inode from memory.

Parameters

[in]	fs	is the file system.
[in]	handle	is the inode handle to unload.
[in]	update_ctime	Update the ctime field of the inode.

Return values

0	Successful operation.
error_code	An error occurred.