CMD native partition specific functions

Functions
static int	cbmimage_i_dnp_chdir (cbmimage_image_settings *settings, cbmimage_dir_entry *dir_entry)
static int	cbmimage_i_dnp_set_bam (cbmimage_image_settings *settings)
static int	cbmimage_i_dnp_get_geos_infoblock (cbmimage_image_settings *settings)
int	cbmimage_i_dnp_chdir_partition_init (cbmimage_image_settings *settings)

Variables
static const cbmimage_fileimage_functions	dnp_fileimage_functions

Detailed Description

Todo

The number of free blocks of a DNP partition is wrong. It seems that the first 64 blocks are reserved and not counted. How to be confirmed

The partition sizes are not correct. For D1M, the last block is 12/127. For D2M, it is 25/255. For D4M, it is 50/255.

Function Documentation

cbmimage_i_dnp_chdir()

static int cbmimage_i_dnp_chdir ( cbmimage_image_settings * settings, cbmimage_dir_entry * dir_entry )

static

function for chdir'ing in a DNP image

Parameters

[in]	settings	pointer to the image data internal settings
[in]	dir_entry	pointer to the dir_entry to which to chdir.

Returns

• 0 if no error occurred
• != 0 if an error occurred

Remarks

• This function tests if the directory entry is actually a directory to which it can change. If it is not valid, it should return with an error value != 0. In this case, the chdir is aborted and returns with an error, too.

Todo

this function is a dummy

cbmimage_i_dnp_chdir_partition_init()

int cbmimage_i_dnp_chdir_partition_init

(

cbmimage_image_settings *

settings

)

create structures for a DNP image when chdir()ing to an image

Parameters

[in]

settings

pointer to the image settings

Returns

• 0 on success
• -1 on error

cbmimage_i_dnp_get_geos_infoblock()

static int cbmimage_i_dnp_get_geos_infoblock ( cbmimage_image_settings * settings )

static

get the GEOS info block of this image has one

Parameters

[in]

settings

pointer to the image data internal settings

Returns

• 0 if this is a non-GEOS image
• != 0 if this is a GEOS image

cbmimage_i_dnp_set_bam()

static int cbmimage_i_dnp_set_bam ( cbmimage_image_settings * settings )

static

Occupy additional BAM entries for DNP sub-dirs

Parameters

[in]

settings

pointer to the image data internal settings

Returns

• 0 if no error occurred
• != 0 if an error occurred

Remarks

• This function is used after chdir'ing. In this case, the 1581 marks all blocks outside of the partition as used.

Variable Documentation

dnp_fileimage_functions

const cbmimage_fileimage_functions dnp_fileimage_functions

static

Initial value:

= {
  .chdir = cbmimage_i_dnp_chdir,
  .set_bam = cbmimage_i_dnp_set_bam,
}

template for the file image functions for DNP images

This is a template that is copied into the image specific data.