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Diffstat (limited to 'exfat/mkfs/main.c')
| -rw-r--r-- | exfat/mkfs/main.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/exfat/mkfs/main.c b/exfat/mkfs/main.c new file mode 100644 index 000000000..9feb750ee --- /dev/null +++ b/exfat/mkfs/main.c @@ -0,0 +1,269 @@ +/* + 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; +} |