/*
main.c (15.08.10)
Creates exFAT file system.
Copyright (C) 2011, 2012 Andrew Nayenko
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <exfat.h>
#include "mkexfat.h"
#include "vbr.h"
#include "fat.h"
#include "cbm.h"
#include "uct.h"
#include "rootdir.h"
const struct fs_object* objects[] =
{
&vbr,
&vbr,
&fat,
/* clusters heap */
&cbm,
&uct,
&rootdir,
NULL,
};
static struct
{
int sector_bits;
int spc_bits;
off64_t volume_size;
le16_t volume_label[EXFAT_ENAME_MAX + 1];
uint32_t volume_serial;
uint64_t first_sector;
}
param;
int get_sector_bits(void)
{
return param.sector_bits;
}
int get_spc_bits(void)
{
return param.spc_bits;
}
off64_t get_volume_size(void)
{
return param.volume_size;
}
const le16_t* get_volume_label(void)
{
return param.volume_label;
}
uint32_t get_volume_serial(void)
{
return param.volume_serial;
}
uint64_t get_first_sector(void)
{
return param.first_sector;
}
int get_sector_size(void)
{
return 1 << get_sector_bits();
}
int get_cluster_size(void)
{
return get_sector_size() << get_spc_bits();
}
static int setup_spc_bits(int sector_bits, int user_defined, off64_t volume_size)
{
int i;
if (user_defined != -1)
{
off64_t cluster_size = 1 << sector_bits << user_defined;
if (volume_size / cluster_size > EXFAT_LAST_DATA_CLUSTER)
{
struct exfat_human_bytes chb, vhb;
exfat_humanize_bytes(cluster_size, &chb);
exfat_humanize_bytes(volume_size, &vhb);
exfat_error("cluster size %"PRIu64" %s is too small for "
"%"PRIu64" %s volume, try -s %d",
chb.value, chb.unit,
vhb.value, vhb.unit,
1 << setup_spc_bits(sector_bits, -1, volume_size));
return -1;
}
return user_defined;
}
if (volume_size < 256ull * 1024 * 1024)
return MAX(0, 12 - sector_bits); /* 4 KB */
if (volume_size < 32ull * 1024 * 1024 * 1024)
return MAX(0, 15 - sector_bits); /* 32 KB */
for (i = 17; ; i++) /* 128 KB or more */
if (DIV_ROUND_UP(volume_size, 1 << i) <= EXFAT_LAST_DATA_CLUSTER)
return MAX(0, i - sector_bits);
}
static int setup_volume_label(le16_t label[EXFAT_ENAME_MAX + 1], const char* s)
{
memset(label, 0, (EXFAT_ENAME_MAX + 1) * sizeof(le16_t));
if (s == NULL)
return 0;
return utf8_to_utf16(label, s, EXFAT_ENAME_MAX, strlen(s));
}
static uint32_t setup_volume_serial(uint32_t user_defined)
{
struct timeval now;
if (user_defined != 0)
return user_defined;
if (gettimeofday(&now, NULL) != 0)
{
exfat_error("failed to form volume id");
return 0;
}
return (now.tv_sec << 20) | now.tv_usec;
}
static int setup(struct exfat_dev* dev, int sector_bits, int spc_bits,
const char* volume_label, uint32_t volume_serial,
uint64_t first_sector)
{
param.sector_bits = sector_bits;
param.first_sector = first_sector;
param.volume_size = exfat_get_size(dev);
param.spc_bits = setup_spc_bits(sector_bits, spc_bits, param.volume_size);
if (param.spc_bits == -1)
return 1;
if (setup_volume_label(param.volume_label, volume_label) != 0)
return 1;
param.volume_serial = setup_volume_serial(volume_serial);
if (param.volume_serial == 0)
return 1;
return mkfs(dev, param.volume_size);
}
static int logarithm2(int n)
{
int i;
for (i = 0; i < sizeof(int) * CHAR_BIT - 1; i++)
if ((1 << i) == n)
return i;
return -1;
}
static void usage(const char* prog)
{
fprintf(stderr, "Usage: %s [-i volume-id] [-n label] "
"[-p partition-first-sector] "
"[-s sectors-per-cluster] [-v] <device>\n", prog);
exit(1);
}
int main(int argc, char* argv[])
{
const char* spec = NULL;
char** pp;
int spc_bits = -1;
const char* volume_label = NULL;
uint32_t volume_serial = 0;
uint64_t first_sector = 0;
struct exfat_dev* dev;
printf("mkexfatfs %u.%u.%u\n",
EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
for (pp = argv + 1; *pp; pp++)
{
if (strcmp(*pp, "-s") == 0)
{
pp++;
if (*pp == NULL)
usage(argv[0]);
spc_bits = logarithm2(atoi(*pp));
if (spc_bits < 0)
{
exfat_error("invalid option value: `%s'", *pp);
return 1;
}
}
else if (strcmp(*pp, "-n") == 0)
{
pp++;
if (*pp == NULL)
usage(argv[0]);
volume_label = *pp;
}
else if (strcmp(*pp, "-i") == 0)
{
pp++;
if (*pp == NULL)
usage(argv[0]);
volume_serial = strtol(*pp, NULL, 16);
}
else if (strcmp(*pp, "-p") == 0)
{
pp++;
if (*pp == NULL)
usage(argv[0]);
first_sector = strtoll(*pp, NULL, 10);
}
else if (strcmp(*pp, "-v") == 0)
{
puts("Copyright (C) 2011, 2012 Andrew Nayenko");
return 0;
}
else if (spec == NULL)
spec = *pp;
else
usage(argv[0]);
}
if (spec == NULL)
usage(argv[0]);
dev = exfat_open(spec, EXFAT_MODE_RW);
if (dev == NULL)
return 1;
if (setup(dev, 9, spc_bits, volume_label, volume_serial,
first_sector) != 0)
{
exfat_close(dev);
return 1;
}
if (exfat_close(dev) != 0)
return 1;
printf("File system created successfully.\n");
return 0;
}
