X-Git-Url: https://git.sven.stormbind.net/?p=sven%2Fexfatprogs.git;a=blobdiff_plain;f=mkfs%2Fmkfs.c;h=b5b4957c72158bf844c2b69a4d4bb9a2b448d01c;hp=9fff97811160e3a5bcce8a01814dabf34bc78ce6;hb=HEAD;hpb=77466d00ac72316d70c469b34dc8f5247520a31e diff --git a/mkfs/mkfs.c b/mkfs/mkfs.c index 9fff978..773c64e 100644 --- a/mkfs/mkfs.c +++ b/mkfs/mkfs.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -45,15 +46,15 @@ static void exfat_setup_boot_sector(struct pbr *ppbr, struct bsx64 *pbsx = &ppbr->bsx; unsigned int i; - /* Fill exfat BIOS paramemter block */ + /* Fill exfat BIOS parameter block */ pbpb->jmp_boot[0] = 0xeb; pbpb->jmp_boot[1] = 0x76; pbpb->jmp_boot[2] = 0x90; memcpy(pbpb->oem_name, "EXFAT ", 8); memset(pbpb->res_zero, 0, 53); - /* Fill exfat extend BIOS paramemter block */ - pbsx->vol_offset = 0; + /* Fill exfat extend BIOS parameter block */ + pbsx->vol_offset = cpu_to_le64(bd->offset / bd->sector_size); pbsx->vol_length = cpu_to_le64(bd->size / bd->sector_size); pbsx->fat_offset = cpu_to_le32(finfo.fat_byte_off / bd->sector_size); pbsx->fat_length = cpu_to_le32(finfo.fat_byte_len / bd->sector_size); @@ -71,11 +72,14 @@ static void exfat_setup_boot_sector(struct pbr *ppbr, /* fs_version[0] : minor and fs_version[1] : major */ pbsx->fs_version[0] = 0; pbsx->fs_version[1] = 1; + pbsx->phy_drv_no = 0x80; memset(pbsx->reserved2, 0, 7); memset(ppbr->boot_code, 0, 390); ppbr->signature = cpu_to_le16(PBR_SIGNATURE); + exfat_debug("Volume Offset(sectors) : %" PRIu64 "\n", + le64_to_cpu(pbsx->vol_offset)); exfat_debug("Volume Length(sectors) : %" PRIu64 "\n", le64_to_cpu(pbsx->vol_length)); exfat_debug("FAT Offset(sector offset) : %u\n", @@ -84,32 +88,17 @@ static void exfat_setup_boot_sector(struct pbr *ppbr, le32_to_cpu(pbsx->fat_length)); exfat_debug("Cluster Heap Offset (sector offset) : %u\n", le32_to_cpu(pbsx->clu_offset)); - exfat_debug("Cluster Count (sectors) : %u\n", + exfat_debug("Cluster Count : %u\n", le32_to_cpu(pbsx->clu_count)); exfat_debug("Root Cluster (cluster offset) : %u\n", le32_to_cpu(pbsx->root_cluster)); + exfat_debug("Volume Serial : 0x%x\n", le32_to_cpu(pbsx->vol_serial)); exfat_debug("Sector Size Bits : %u\n", pbsx->sect_size_bits); exfat_debug("Sector per Cluster bits : %u\n", pbsx->sect_per_clus_bits); } -static int exfat_write_sector(struct exfat_blk_dev *bd, void *buf, - unsigned int sec_off) -{ - int bytes; - unsigned long long offset = sec_off * bd->sector_size; - - lseek(bd->dev_fd, offset, SEEK_SET); - bytes = write(bd->dev_fd, buf, bd->sector_size); - if (bytes != (int)bd->sector_size) { - exfat_err("write failed, sec_off : %u, bytes : %d\n", sec_off, - bytes); - return -1; - } - return 0; -} - static int exfat_write_boot_sector(struct exfat_blk_dev *bd, struct exfat_user_input *ui, unsigned int *checksum, bool is_backup) @@ -121,12 +110,12 @@ static int exfat_write_boot_sector(struct exfat_blk_dev *bd, if (is_backup) sec_idx += BACKUP_BOOT_SEC_IDX; - ppbr = malloc(sizeof(struct pbr)); + ppbr = malloc(bd->sector_size); if (!ppbr) { exfat_err("Cannot allocate pbr: out of memory\n"); return -1; } - memset(ppbr, 0, sizeof(struct pbr)); + memset(ppbr, 0, bd->sector_size); exfat_setup_boot_sector(ppbr, bd, ui); @@ -138,7 +127,7 @@ static int exfat_write_boot_sector(struct exfat_blk_dev *bd, goto free_ppbr; } - boot_calc_checksum((unsigned char *)ppbr, sizeof(struct pbr), + boot_calc_checksum((unsigned char *)ppbr, bd->sector_size, true, checksum); free_ppbr: @@ -149,26 +138,36 @@ free_ppbr: static int exfat_write_extended_boot_sectors(struct exfat_blk_dev *bd, unsigned int *checksum, bool is_backup) { - struct exbs eb; + char *peb; + __le16 *peb_signature; + int ret = 0; int i; unsigned int sec_idx = EXBOOT_SEC_IDX; + peb = malloc(bd->sector_size); + if (!peb) + return -1; + if (is_backup) sec_idx += BACKUP_BOOT_SEC_IDX; - memset(&eb, 0, sizeof(struct exbs)); - eb.signature = cpu_to_le16(PBR_SIGNATURE); + memset(peb, 0, bd->sector_size); + peb_signature = (__le16*) (peb + bd->sector_size - 2); + *peb_signature = cpu_to_le16(PBR_SIGNATURE); for (i = 0; i < EXBOOT_SEC_NUM; i++) { - if (exfat_write_sector(bd, &eb, sec_idx++)) { + if (exfat_write_sector(bd, peb, sec_idx++)) { exfat_err("extended boot sector write failed\n"); - return -1; + ret = -1; + goto free_peb; } - boot_calc_checksum((unsigned char *) &eb, sizeof(struct exbs), + boot_calc_checksum((unsigned char *) peb, bd->sector_size, false, checksum); } - return 0; +free_peb: + free(peb); + return ret; } static int exfat_write_oem_sector(struct exfat_blk_dev *bd, @@ -213,35 +212,6 @@ free_oem: return ret; } -static int exfat_write_checksum_sector(struct exfat_blk_dev *bd, - unsigned int checksum, bool is_backup) -{ - __le32 *checksum_buf; - int ret = 0; - unsigned int i; - unsigned int sec_idx = CHECKSUM_SEC_IDX; - - checksum_buf = malloc(bd->sector_size); - if (!checksum_buf) - return -1; - - if (is_backup) - sec_idx += BACKUP_BOOT_SEC_IDX; - - for (i = 0; i < bd->sector_size / sizeof(int); i++) - checksum_buf[i] = cpu_to_le32(checksum); - - ret = exfat_write_sector(bd, checksum_buf, sec_idx); - if (ret) { - exfat_err("checksum sector write failed\n"); - goto free; - } - -free: - free(checksum_buf); - return ret; -} - static int exfat_create_volume_boot_record(struct exfat_blk_dev *bd, struct exfat_user_input *ui, bool is_backup) { @@ -265,9 +235,9 @@ static int write_fat_entry(int fd, __le32 clu, unsigned long long offset) { int nbyte; + off_t fat_entry_offset = finfo.fat_byte_off + (offset * sizeof(__le32)); - lseek(fd, finfo.fat_byte_off + (offset * sizeof(__le32)), SEEK_SET); - nbyte = write(fd, (__u8 *) &clu, sizeof(__le32)); + nbyte = pwrite(fd, (__u8 *) &clu, sizeof(__le32), fat_entry_offset); if (nbyte != sizeof(int)) { exfat_err("write failed, offset : %llu, clu : %x\n", offset, clu); @@ -344,15 +314,15 @@ static int exfat_create_bitmap(struct exfat_blk_dev *bd) char *bitmap; unsigned int i, nbytes; - bitmap = calloc(finfo.bitmap_byte_len, sizeof(*bitmap)); + bitmap = calloc(round_up(finfo.bitmap_byte_len, sizeof(bitmap_t)), + sizeof(*bitmap)); if (!bitmap) return -1; - for (i = 0; i < finfo.used_clu_cnt - EXFAT_FIRST_CLUSTER; i++) - exfat_set_bit(bd, bitmap, i); + for (i = EXFAT_FIRST_CLUSTER; i < finfo.used_clu_cnt; i++) + exfat_bitmap_set(bitmap, i); - lseek(bd->dev_fd, finfo.bitmap_byte_off, SEEK_SET); - nbytes = write(bd->dev_fd, bitmap, finfo.bitmap_byte_len); + nbytes = pwrite(bd->dev_fd, bitmap, finfo.bitmap_byte_len, finfo.bitmap_byte_off); if (nbytes != finfo.bitmap_byte_len) { exfat_err("write failed, nbytes : %d, bitmap_len : %d\n", nbytes, finfo.bitmap_byte_len); @@ -367,8 +337,8 @@ static int exfat_create_bitmap(struct exfat_blk_dev *bd) static int exfat_create_root_dir(struct exfat_blk_dev *bd, struct exfat_user_input *ui) { - struct exfat_dentry ed[3]; - int dentries_len = sizeof(struct exfat_dentry) * 3; + struct exfat_dentry ed[4] = {0}; + int dentries_len = sizeof(ed); int nbytes; /* Set volume label entry */ @@ -377,20 +347,31 @@ static int exfat_create_root_dir(struct exfat_blk_dev *bd, memcpy(ed[0].vol_label, ui->volume_label, ui->volume_label_len); ed[0].vol_char_cnt = ui->volume_label_len/2; + /* Set volume GUID entry */ + if (ui->guid) { + if (__exfat_set_volume_guid(&ed[1], ui->guid)) + return -1; + } else { + /* + * Since a single empty entry cannot be allocated for a + * file, this can reserve the entry for volume GUID. + */ + ed[1].type = EXFAT_GUID & ~EXFAT_INVAL; + } + /* Set bitmap entry */ - ed[1].type = EXFAT_BITMAP; - ed[1].bitmap_flags = 0; - ed[1].bitmap_start_clu = cpu_to_le32(EXFAT_FIRST_CLUSTER); - ed[1].bitmap_size = cpu_to_le64(finfo.bitmap_byte_len); + ed[2].type = EXFAT_BITMAP; + ed[2].bitmap_flags = 0; + ed[2].bitmap_start_clu = cpu_to_le32(EXFAT_FIRST_CLUSTER); + ed[2].bitmap_size = cpu_to_le64(finfo.bitmap_byte_len); /* Set upcase table entry */ - ed[2].type = EXFAT_UPCASE; - ed[2].upcase_checksum = cpu_to_le32(0xe619d30d); - ed[2].upcase_start_clu = cpu_to_le32(finfo.ut_start_clu); - ed[2].upcase_size = cpu_to_le64(EXFAT_UPCASE_TABLE_SIZE); + ed[3].type = EXFAT_UPCASE; + ed[3].upcase_checksum = cpu_to_le32(0xe619d30d); + ed[3].upcase_start_clu = cpu_to_le32(finfo.ut_start_clu); + ed[3].upcase_size = cpu_to_le64(EXFAT_UPCASE_TABLE_SIZE); - lseek(bd->dev_fd, finfo.root_byte_off, SEEK_SET); - nbytes = write(bd->dev_fd, ed, dentries_len); + nbytes = pwrite(bd->dev_fd, ed, dentries_len, finfo.root_byte_off); if (nbytes != dentries_len) { exfat_err("write failed, nbytes : %d, dentries_len : %d\n", nbytes, dentries_len); @@ -402,59 +383,113 @@ static int exfat_create_root_dir(struct exfat_blk_dev *bd, static void usage(void) { - fprintf(stderr, "Usage: mkfs.exfat\n"); - fprintf(stderr, "\t-L | --volume-label=label Set volume label\n"); - fprintf(stderr, "\t-c | --cluster-size=size(or suffixed by 'K' or 'M') Specify cluster size\n"); - fprintf(stderr, "\t-b | --boundary-align=size(or suffixed by 'K' or 'M') Specify boundary alignment\n"); - fprintf(stderr, "\t-f | --full-format Full format\n"); - fprintf(stderr, "\t-V | --version Show version\n"); - fprintf(stderr, "\t-v | --verbose Print debug\n"); - fprintf(stderr, "\t-h | --help Show help\n"); + fputs("Usage: mkfs.exfat\n" + "\t-L | --volume-label=label Set volume label\n" + "\t-U | --volume-guid=guid Set volume GUID\n" + "\t-c | --cluster-size=size(or suffixed by 'K' or 'M') Specify cluster size\n" + "\t-b | --boundary-align=size(or suffixed by 'K' or 'M') Specify boundary alignment\n" + "\t --pack-bitmap Move bitmap into FAT segment\n" + "\t-f | --full-format Full format\n" + "\t-V | --version Show version\n" + "\t-q | --quiet Print only errors\n" + "\t-v | --verbose Print debug\n" + "\t-h | --help Show help\n", + stderr); exit(EXIT_FAILURE); } -static struct option opts[] = { +#define PACK_BITMAP (CHAR_MAX + 1) + +static const struct option opts[] = { {"volume-label", required_argument, NULL, 'L' }, + {"volume-guid", required_argument, NULL, 'U' }, {"cluster-size", required_argument, NULL, 'c' }, {"boundary-align", required_argument, NULL, 'b' }, + {"pack-bitmap", no_argument, NULL, PACK_BITMAP }, {"full-format", no_argument, NULL, 'f' }, {"version", no_argument, NULL, 'V' }, + {"quiet", no_argument, NULL, 'q' }, {"verbose", no_argument, NULL, 'v' }, {"help", no_argument, NULL, 'h' }, {"?", no_argument, NULL, '?' }, {NULL, 0, NULL, 0 } }; +/* + * Moves the bitmap to just before the alignment boundary if there is space + * between the boundary and the end of the FAT. This may allow the FAT and the + * bitmap to share the same allocation unit on flash media, thereby improving + * performance and endurance. + */ +static int exfat_pack_bitmap(const struct exfat_user_input *ui) +{ + unsigned int fat_byte_end = finfo.fat_byte_off + finfo.fat_byte_len, + bitmap_byte_len = finfo.bitmap_byte_len, + bitmap_clu_len = round_up(bitmap_byte_len, ui->cluster_size), + bitmap_clu_cnt, total_clu_cnt, new_bitmap_clu_len; + + for (;;) { + bitmap_clu_cnt = bitmap_clu_len / ui->cluster_size; + if (finfo.clu_byte_off - bitmap_clu_len < fat_byte_end || + finfo.total_clu_cnt > EXFAT_MAX_NUM_CLUSTER - + bitmap_clu_cnt) + return -1; + total_clu_cnt = finfo.total_clu_cnt + bitmap_clu_cnt; + bitmap_byte_len = round_up(total_clu_cnt, 8) / 8; + new_bitmap_clu_len = round_up(bitmap_byte_len, ui->cluster_size); + if (new_bitmap_clu_len == bitmap_clu_len) { + finfo.clu_byte_off -= bitmap_clu_len; + finfo.total_clu_cnt = total_clu_cnt; + finfo.bitmap_byte_off -= bitmap_clu_len; + finfo.bitmap_byte_len = bitmap_byte_len; + return 0; + } + bitmap_clu_len = new_bitmap_clu_len; + } +} + static int exfat_build_mkfs_info(struct exfat_blk_dev *bd, struct exfat_user_input *ui) { + unsigned long long total_clu_cnt; int clu_len; + if (ui->cluster_size < bd->sector_size) { + exfat_err("cluster size (%u bytes) is smaller than sector size (%u bytes)\n", + ui->cluster_size, bd->sector_size); + return -1; + } if (ui->boundary_align < bd->sector_size) { exfat_err("boundary alignment is too small (min %d)\n", bd->sector_size); return -1; } - finfo.fat_byte_off = round_up(24 * bd->sector_size, - ui->boundary_align); - finfo.fat_byte_len = round_up((bd->num_clusters * sizeof(int)), - ui->cluster_size); - finfo.clu_byte_off = round_up(finfo.fat_byte_off + finfo.fat_byte_len, - ui->boundary_align); + finfo.fat_byte_off = round_up(bd->offset + 24 * bd->sector_size, + ui->boundary_align) - bd->offset; + /* Prevent integer overflow when computing the FAT length */ + if (bd->num_clusters > UINT32_MAX / 4) { + exfat_err("cluster size (%u bytes) is too small\n", ui->cluster_size); + return -1; + } + finfo.fat_byte_len = round_up((bd->num_clusters * 4), ui->cluster_size); + finfo.clu_byte_off = round_up(bd->offset + finfo.fat_byte_off + + finfo.fat_byte_len, ui->boundary_align) - bd->offset; if (bd->size <= finfo.clu_byte_off) { exfat_err("boundary alignment is too big\n"); return -1; } - finfo.total_clu_cnt = (bd->size - finfo.clu_byte_off) / - ui->cluster_size; - if (finfo.total_clu_cnt > EXFAT_MAX_NUM_CLUSTER) { + total_clu_cnt = (bd->size - finfo.clu_byte_off) / ui->cluster_size; + if (total_clu_cnt > EXFAT_MAX_NUM_CLUSTER) { exfat_err("cluster size is too small\n"); return -1; } + finfo.total_clu_cnt = (unsigned int) total_clu_cnt; finfo.bitmap_byte_off = finfo.clu_byte_off; finfo.bitmap_byte_len = round_up(finfo.total_clu_cnt, 8) / 8; + if (ui->pack_bitmap) + exfat_pack_bitmap(ui); clu_len = round_up(finfo.bitmap_byte_len, ui->cluster_size); finfo.ut_start_clu = EXFAT_FIRST_CLUSTER + clu_len / ui->cluster_size; @@ -586,6 +621,7 @@ int main(int argc, char *argv[]) struct exfat_blk_dev bd; struct exfat_user_input ui; bool version_only = false; + bool quiet = false; init_user_input(&ui); @@ -593,7 +629,7 @@ int main(int argc, char *argv[]) exfat_err("failed to init locale/codeset\n"); opterr = 0; - while ((c = getopt_long(argc, argv, "n:L:c:b:fVvh", opts, NULL)) != EOF) + while ((c = getopt_long(argc, argv, "n:L:U:c:b:fVqvh", opts, NULL)) != EOF) switch (c) { /* * Make 'n' option fallthrough to 'L' option for for backward @@ -610,6 +646,10 @@ int main(int argc, char *argv[]) ui.volume_label_len = ret; break; } + case 'U': + if (*optarg != '\0' && *optarg != '\r') + ui.guid = optarg; + break; case 'c': ret = parse_size(optarg); if (ret < 0) @@ -636,12 +676,19 @@ int main(int argc, char *argv[]) } ui.boundary_align = ret; break; + case PACK_BITMAP: + ui.pack_bitmap = true; + break; case 'f': ui.quick = false; break; case 'V': version_only = true; break; + case 'q': + print_level = EXFAT_ERROR; + quiet = true; + break; case 'v': print_level = EXFAT_DEBUG; break; @@ -651,9 +698,12 @@ int main(int argc, char *argv[]) usage(); } - show_version(); - if (version_only) + if (version_only) { + show_version(); exit(EXIT_FAILURE); + } else if (!quiet) { + show_version(); + } if (argc - optind != 1) { usage(); @@ -686,6 +736,6 @@ out: if (!ret) exfat_info("\nexFAT format complete!\n"); else - exfat_info("\nexFAT format fail!\n"); + exfat_err("\nexFAT format fail!\n"); return ret; }