int main(int argc, char* argv[])
{
const char* spec = NULL;
int opt;
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);
while ((opt = getopt(argc, argv, "i:n:p:s:V")) != -1)
{
switch (opt)
{
case 'i':
volume_serial = strtol(optarg, NULL, 16);
break;
case 'n':
volume_label = optarg;
break;
case 'p':
first_sector = strtoll(optarg, NULL, 10);
break;
case 's':
spc_bits = logarithm2(atoi(optarg));
if (spc_bits < 0)
{
exfat_error("invalid option value: `%s'", optarg);
return 1;
}
break;
case 'V':
puts("Copyright (C) 2011-2013 Andrew Nayenko");
return 0;
default:
usage(argv[0]);
break;
}
}
if (argc - optind != 1)
usage(argv[0]);
spec = argv[optind];
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;
}
static int dump_sb(const char* spec)
{
struct exfat_dev* dev;
struct exfat_super_block sb;
dev = exfat_open(spec, EXFAT_MODE_RO);
if (dev == NULL)
return 1;
if (exfat_read(dev, &sb, sizeof(struct exfat_super_block)) < 0)
{
exfat_close(dev);
exfat_error("failed to read from '%s'", spec);
return 1;
}
if (memcmp(sb.oem_name, "EXFAT ", sizeof(sb.oem_name)) != 0)
{
exfat_close(dev);
exfat_error("exFAT file system is not found on '%s'", spec);
return 1;
}
print_generic_info(&sb);
print_sector_info(&sb);
print_cluster_info(&sb);
print_other_info(&sb);
exfat_close(dev);
return 0;
}
int fuse_exfat_format(const char *label, ULONG dostype) {
struct fuse_context* cntx = fuse_get_context();
struct exfat_mount_data* md = cntx->private_data;
struct exfat_dev* dev;
dev = exfat_open(md->device, EXFAT_MODE_RW);
if (dev == NULL)
return -EIO;
if (setup(dev, 9, -1, label, 0, 0) != 0)
{
exfat_close(dev);
return -EIO;
}
if (exfat_close(dev) != 0)
return -EIO;
return 0;
}
void exfat_unmount(struct exfat* ef)
{
exfat_flush_nodes(ef); /* ignore return code */
exfat_flush(ef); /* ignore return code */
exfat_put_node(ef, ef->root);
exfat_reset_cache(ef);
free(ef->root);
ef->root = NULL;
finalize_super_block(ef);
exfat_close(ef->dev); /* close descriptor immediately after fsync */
ef->dev = NULL;
free(ef->zero_cluster);
ef->zero_cluster = NULL;
free(ef->cmap.chunk);
ef->cmap.chunk = NULL;
free(ef->sb);
ef->sb = NULL;
free(ef->upcase);
ef->upcase = NULL;
ef->upcase_chars = 0;
}
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) 2011-2013 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;
}
int exfat_mount(struct exfat* ef, const char* spec, const char* options)
{
int rc;
enum exfat_mode mode;
exfat_tzset();
memset(ef, 0, sizeof(struct exfat));
parse_options(ef, options);
if (match_option(options, "ro"))
mode = EXFAT_MODE_RO;
else if (match_option(options, "ro_fallback"))
mode = EXFAT_MODE_ANY;
else
mode = EXFAT_MODE_RW;
ef->dev = exfat_open(spec, mode);
if (ef->dev == NULL)
return -EIO;
if (exfat_get_mode(ef->dev) == EXFAT_MODE_RO)
{
if (mode == EXFAT_MODE_ANY)
ef->ro = -1;
else
ef->ro = 1;
}
ef->sb = malloc(sizeof(struct exfat_super_block));
if (ef->sb == NULL)
{
exfat_close(ef->dev);
exfat_error("failed to allocate memory for the super block");
return -ENOMEM;
}
memset(ef->sb, 0, sizeof(struct exfat_super_block));
if (exfat_pread(ef->dev, ef->sb, sizeof(struct exfat_super_block), 0) < 0)
{
exfat_close(ef->dev);
free(ef->sb);
exfat_error("failed to read boot sector");
return -EIO;
}
if (memcmp(ef->sb->oem_name, "EXFAT ", 8) != 0)
{
exfat_close(ef->dev);
free(ef->sb);
exfat_error("exFAT file system is not found");
return -EIO;
}
/* sector cannot be smaller than 512 bytes */
if (ef->sb->sector_bits < 9)
{
exfat_close(ef->dev);
exfat_error("too small sector size: 2^%hhd", ef->sb->sector_bits);
free(ef->sb);
return -EIO;
}
/* officially exFAT supports cluster size up to 32 MB */
if ((int) ef->sb->sector_bits + (int) ef->sb->spc_bits > 25)
{
exfat_close(ef->dev);
exfat_error("too big cluster size: 2^(%hhd+%hhd)",
ef->sb->sector_bits, ef->sb->spc_bits);
free(ef->sb);
return -EIO;
}
ef->zero_cluster = malloc(CLUSTER_SIZE(*ef->sb));
if (ef->zero_cluster == NULL)
{
exfat_close(ef->dev);
free(ef->sb);
exfat_error("failed to allocate zero sector");
return -ENOMEM;
}
/* use zero_cluster as a temporary buffer for VBR checksum verification */
if (!verify_vbr_checksum(ef->dev, ef->zero_cluster, SECTOR_SIZE(*ef->sb)))
{
free(ef->zero_cluster);
exfat_close(ef->dev);
free(ef->sb);
return -EIO;
}
memset(ef->zero_cluster, 0, CLUSTER_SIZE(*ef->sb));
if (ef->sb->version.major != 1 || ef->sb->version.minor != 0)
{
free(ef->zero_cluster);
exfat_close(ef->dev);
exfat_error("unsupported exFAT version: %hhu.%hhu",
ef->sb->version.major, ef->sb->version.minor);
free(ef->sb);
return -EIO;
}
if (ef->sb->fat_count != 1)
{
free(ef->zero_cluster);
exfat_close(ef->dev);
exfat_error("unsupported FAT count: %hhu", ef->sb->fat_count);
free(ef->sb);
return -EIO;
}
if (le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb) >
exfat_get_size(ef->dev))
{
/* this can cause I/O errors later but we don't fail mounting to let
user rescue data */
exfat_warn("file system is larger than underlying device: "
"%"PRIu64" > %"PRIu64,
le64_to_cpu(ef->sb->sector_count) * SECTOR_SIZE(*ef->sb),
exfat_get_size(ef->dev));
}
ef->root = malloc(sizeof(struct exfat_node));
if (ef->root == NULL)
{
free(ef->zero_cluster);
exfat_close(ef->dev);
free(ef->sb);
exfat_error("failed to allocate root node");
return -ENOMEM;
}
memset(ef->root, 0, sizeof(struct exfat_node));
ef->root->flags = EXFAT_ATTRIB_DIR;
ef->root->start_cluster = le32_to_cpu(ef->sb->rootdir_cluster);
ef->root->fptr_cluster = ef->root->start_cluster;
ef->root->name[0] = cpu_to_le16('\0');
ef->root->size = rootdir_size(ef);
if (ef->root->size == 0)
{
free(ef->root);
free(ef->zero_cluster);
exfat_close(ef->dev);
free(ef->sb);
return -EIO;
}
/* exFAT does not have time attributes for the root directory */
ef->root->mtime = 0;
ef->root->atime = 0;
/* always keep at least 1 reference to the root node */
exfat_get_node(ef->root);
rc = exfat_cache_directory(ef, ef->root);
if (rc != 0)
goto error;
if (ef->upcase == NULL)
{
exfat_error("upcase table is not found");
goto error;
}
if (ef->cmap.chunk == NULL)
{
exfat_error("clusters bitmap is not found");
goto error;
}
if (prepare_super_block(ef) != 0)
goto error;
return 0;
error:
exfat_put_node(ef, ef->root);
exfat_reset_cache(ef);
free(ef->root);
free(ef->zero_cluster);
exfat_close(ef->dev);
free(ef->sb);
return -EIO;
}