/**
* @file
*
* @ingroup rtems_bdpart
*
* Block device partition management.
*/
/*
* Copyright (c) 2009, 2010
* embedded brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rtems.h>
#include <rtems/bdpart.h>
rtems_status_code rtems_bdpart_register(
const char *disk_name,
const rtems_bdpart_partition *pt,
size_t count
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_status_code esc = RTEMS_SUCCESSFUL;
rtems_device_major_number major = 0;
rtems_device_minor_number minor = 0;
rtems_blkdev_bnum disk_end = 0;
dev_t disk = 0;
dev_t logical_disk = 0;
char *logical_disk_name = NULL;
char *logical_disk_marker = NULL;
size_t disk_name_size = strlen( disk_name);
size_t i = 0;
int fd = -1;
const rtems_disk_device *dd = NULL;
/* Get disk data */
sc = rtems_bdpart_get_disk_data( disk_name, &fd, &dd, &disk_end);
if (sc != RTEMS_SUCCESSFUL) {
return sc;
}
disk = rtems_disk_get_device_identifier( dd);
close( fd);
/* Get the disk device identifier */
rtems_filesystem_split_dev_t( disk, major, minor);
/* Create logical disk name */
logical_disk_name = malloc( disk_name_size + RTEMS_BDPART_NUMBER_SIZE);
if (logical_disk_name == NULL) {
return RTEMS_NO_MEMORY;
}
strncpy( logical_disk_name, disk_name, disk_name_size);
logical_disk_marker = logical_disk_name + disk_name_size;
/* Create a logical disk for each partition */
for (i = 0; i < count; ++i) {
const rtems_bdpart_partition *p = pt + i;
int rv = 0;
/* New minor number */
++minor;
/* Create a new device identifier */
logical_disk = rtems_filesystem_make_dev_t( major, minor);
/* Set partition number for logical disk name */
rv = snprintf( logical_disk_marker, RTEMS_BDPART_NUMBER_SIZE, "%zu", i + 1);
if (rv >= RTEMS_BDPART_NUMBER_SIZE) {
esc = RTEMS_INVALID_NAME;
goto cleanup;
}
/* Create logical disk */
sc = rtems_disk_create_log(
logical_disk,
disk,
p->begin,
p->end - p->begin,
logical_disk_name
);
if (sc != RTEMS_SUCCESSFUL) {
esc = sc;
goto cleanup;
}
}
cleanup:
free( logical_disk_name);
return esc;
}
rtems_status_code rtems_bdpart_register_from_disk( const char *disk_name)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_bdpart_format format;
rtems_bdpart_partition pt [RTEMS_BDPART_PARTITION_NUMBER_HINT];
size_t count = RTEMS_BDPART_PARTITION_NUMBER_HINT;
/* Read partitions */
sc = rtems_bdpart_read( disk_name, &format, pt, &count);
if (sc != RTEMS_SUCCESSFUL) {
return sc;
}
/* Register partitions */
return rtems_bdpart_register( disk_name, pt, count);
}
rtems_status_code rtems_bdpart_unregister(
const char *disk_name,
const rtems_bdpart_partition *pt __attribute__((unused)),
size_t count
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_device_major_number major = 0;
rtems_device_minor_number minor = 0;
rtems_blkdev_bnum disk_end = 0;
dev_t disk = 0;
dev_t logical_disk = 0;
size_t i = 0;
int fd = -1;
const rtems_disk_device *dd = NULL;
/* Get disk data */
sc = rtems_bdpart_get_disk_data( disk_name, &fd, &dd, &disk_end);
if (sc != RTEMS_SUCCESSFUL) {
return sc;
}
disk = rtems_disk_get_device_identifier( dd);
close( fd);
/* Get the disk device identifier */
rtems_filesystem_split_dev_t( disk, major, minor);
/* Create a logical disk for each partition */
for (i = 0; i < count; ++i) {
/* New minor number */
++minor;
/* Get the device identifier */
logical_disk = rtems_filesystem_make_dev_t( major, minor);
/* Delete logical disk */
sc = rtems_disk_delete( logical_disk);
if (sc != RTEMS_SUCCESSFUL) {
return sc;
}
}
return RTEMS_SUCCESSFUL;
}