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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fcntl.h>
#include <errno.h>
#include <linux/fs.h>
#include "vold.h"
#include "blkdev.h"
#include "format.h"
#include "diskmbr.h"
#include "logwrapper.h"
static char MKDOSFS_PATH[] = "/system/bin/mkdosfs";
static char MKE2FS_PATH[] = "/system/bin/mke2fs";
int format_partition(blkdev_t *part, char *type)
{
char *devpath;
int rc = -EINVAL;
devpath = blkdev_get_devpath(part);
if (!strcmp(type, FORMAT_TYPE_FAT32)) {
char *args[6];
args[0] = MKDOSFS_PATH;
args[1] = "-c 32";
args[2] = "-n 2";
args[3] = "-O android";
args[4] = devpath;
args[5] = NULL;
rc = logwrap(5, args);
} else {
char *args[7];
args[0] = MKE2FS_PATH;
args[1] = "-b 4096";
args[2] = "-m 1";
args[3] = "-L android";
args[4] = "-v";
args[5] = devpath;
args[6] = NULL;
rc = logwrap(6, args);
}
free(devpath);
if (rc == 0) {
LOG_VOL("Filesystem formatted OK");
return 0;
} else {
LOGE("Format failed (unknokwn exit code %d)", rc);
return -EIO;
}
return 0;
}
int initialize_mbr(blkdev_t *disk)
{
int fd, rc;
unsigned char block[512];
struct dos_partition part;
char *devpath;
devpath = blkdev_get_devpath(disk);
memset(&part, 0, sizeof(part));
part.dp_flag = 0x80;
part.dp_typ = 0xc;
part.dp_start = ((1024 * 64) / 512) + 1;
part.dp_size = disk->nr_sec - part.dp_start;
memset(block, 0, sizeof(block));
block[0x1fe] = 0x55;
block[0x1ff] = 0xaa;
dos_partition_enc(block + DOSPARTOFF, &part);
if ((fd = open(devpath, O_RDWR)) < 0) {
LOGE("Error opening disk file (%s)", strerror(errno));
return -errno;
}
free(devpath);
if (write(fd, block, sizeof(block)) < 0) {
LOGE("Error writing MBR (%s)", strerror(errno));
close(fd);
return -errno;
}
if (ioctl(fd, BLKRRPART, NULL) < 0) {
LOGE("Error re-reading partition table (%s)", strerror(errno));
close(fd);
return -errno;
}
close(fd);
return 0;
}
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