fprintf(stderr, "\t-y | --repair-yes Repair without ask\n");
fprintf(stderr, "\t-n | --repair-no No repair\n");
fprintf(stderr, "\t-p | --repair-auto Repair automatically\n");
+ fprintf(stderr, "\t-a Repair automatically\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");
}
}
-static struct exfat *alloc_exfat(struct exfat_blk_dev *bd, struct pbr *bs)
+static int init_exfat(struct exfat *exfat, struct pbr *bs)
{
- struct exfat *exfat;
int i;
- exfat = (struct exfat *)calloc(1, sizeof(*exfat));
- if (!exfat) {
- free(bs);
- exfat_err("failed to allocate exfat\n");
- return NULL;
- }
-
INIT_LIST_HEAD(&exfat->dir_list);
- exfat->blk_dev = bd;
exfat->bs = bs;
exfat->clus_count = le32_to_cpu(bs->bsx.clu_count);
exfat->clus_size = EXFAT_CLUSTER_SIZE(bs);
if (!exfat->buffer_desc[i].dirty)
goto err;
}
- return exfat;
+ return 0;
err:
free_exfat(exfat);
- return NULL;
+ return -ENOMEM;
}
static void exfat_free_dir_list(struct exfat *exfat)
exfat->bs->bsx.sect_per_clus_bits));
}
-static int boot_region_checksum(struct exfat *exfat)
+static int boot_region_checksum(int dev_fd,
+ int bs_offset, unsigned int sect_size)
{
void *sect;
unsigned int i;
uint32_t checksum;
int ret = 0;
- unsigned short size;
- size = EXFAT_SECTOR_SIZE(exfat->bs);
- sect = malloc(size);
+ sect = malloc(sect_size);
if (!sect)
return -ENOMEM;
checksum = 0;
-
- boot_calc_checksum((unsigned char *)exfat->bs, size, true, &checksum);
- for (i = 1; i < 11; i++) {
- if (exfat_read(exfat->blk_dev->dev_fd, sect, size, i * size) !=
- (ssize_t)size) {
- exfat_err("failed to read boot regions\n");
+ for (i = 0; i < 11; i++) {
+ if (exfat_read(dev_fd, sect, sect_size,
+ bs_offset * sect_size + i * sect_size) !=
+ (ssize_t)sect_size) {
+ exfat_err("failed to read boot region\n");
ret = -EIO;
goto out;
}
- boot_calc_checksum(sect, size, false, &checksum);
+ boot_calc_checksum(sect, sect_size, i == 0, &checksum);
}
- if (exfat_read(exfat->blk_dev->dev_fd, sect, size, 11 * size) !=
- (ssize_t)size) {
+ if (exfat_read(dev_fd, sect, sect_size,
+ bs_offset * sect_size + 11 * sect_size) !=
+ (ssize_t)sect_size) {
exfat_err("failed to read a boot checksum sector\n");
ret = -EIO;
goto out;
}
- for (i = 0; i < size/sizeof(checksum); i++) {
+ for (i = 0; i < sect_size/sizeof(checksum); i++) {
if (le32_to_cpu(((__le32 *)sect)[i]) != checksum) {
- if (exfat_repair_ask(exfat, ER_BS_CHECKSUM,
- "checksums of boot sector are not correct. "
- "%#x, but expected %#x",
- le32_to_cpu(((__le32 *)sect)[i]), checksum)) {
- goto out_write;
- } else {
- ret = -EINVAL;
- goto out;
- }
+ exfat_err("checksum of boot region is not correct. %#x, but expected %#x\n",
+ le32_to_cpu(((__le32 *)sect)[i]), checksum);
+ ret = -EINVAL;
+ goto out;
}
}
out:
free(sect);
return ret;
-
-out_write:
- for (i = 0; i < size/sizeof(checksum); i++)
- ((__le32 *)sect)[i] = cpu_to_le32(checksum);
-
- if (exfat_write(exfat->blk_dev->dev_fd,
- sect, size, size * 11) != size) {
- exfat_err("failed to write checksum sector\n");
- free(sect);
- return -EIO;
- }
- free(sect);
- return 0;
}
static int exfat_mark_volume_dirty(struct exfat *exfat, bool dirty)
return 0;
}
-static int read_boot_region(struct exfat_blk_dev *bd, struct pbr **pbr)
+static int read_boot_region(struct exfat_blk_dev *bd, struct pbr **pbr,
+ int bs_offset, unsigned int sect_size,
+ bool verbose)
{
struct pbr *bs;
+ int ret = -EINVAL;
+ *pbr = NULL;
bs = (struct pbr *)malloc(sizeof(struct pbr));
if (!bs) {
exfat_err("failed to allocate memory\n");
return -ENOMEM;
}
- if (exfat_read(bd->dev_fd, bs, sizeof(*bs), 0) !=
- (ssize_t)sizeof(*bs)) {
+ if (exfat_read(bd->dev_fd, bs, sizeof(*bs),
+ bs_offset * sect_size) != (ssize_t)sizeof(*bs)) {
exfat_err("failed to read a boot sector\n");
- free(bs);
- return -EIO;
+ ret = -EIO;
+ goto err;
}
if (memcmp(bs->bpb.oem_name, "EXFAT ", 8) != 0) {
- exfat_err("failed to find exfat file system.\n");
+ if (verbose)
+ exfat_err("failed to find exfat file system\n");
goto err;
}
+ ret = boot_region_checksum(bd->dev_fd, bs_offset, sect_size);
+ if (ret < 0)
+ goto err;
+
+ ret = -EINVAL;
if (EXFAT_SECTOR_SIZE(bs) < 512 || EXFAT_SECTOR_SIZE(bs) > 4 * KB) {
- exfat_err("too small or big sector size: %d\n",
- EXFAT_SECTOR_SIZE(bs));
+ if (verbose)
+ exfat_err("too small or big sector size: %d\n",
+ EXFAT_SECTOR_SIZE(bs));
goto err;
}
if (EXFAT_CLUSTER_SIZE(bs) > 32 * MB) {
- exfat_err("too big cluster size: %d\n", EXFAT_CLUSTER_SIZE(bs));
+ if (verbose)
+ exfat_err("too big cluster size: %d\n",
+ EXFAT_CLUSTER_SIZE(bs));
goto err;
}
if (bs->bsx.fs_version[1] != 1 || bs->bsx.fs_version[0] != 0) {
- exfat_err("unsupported exfat version: %d.%d\n",
- bs->bsx.fs_version[1], bs->bsx.fs_version[0]);
+ if (verbose)
+ exfat_err("unsupported exfat version: %d.%d\n",
+ bs->bsx.fs_version[1], bs->bsx.fs_version[0]);
goto err;
}
if (bs->bsx.num_fats != 1) {
- exfat_err("unsupported FAT count: %d\n", bs->bsx.num_fats);
+ if (verbose)
+ exfat_err("unsupported FAT count: %d\n",
+ bs->bsx.num_fats);
goto err;
}
if (le64_to_cpu(bs->bsx.vol_length) * EXFAT_SECTOR_SIZE(bs) >
bd->size) {
- exfat_err("too large sector count: %" PRIu64 "\n, expected: %llu\n",
- le64_to_cpu(bs->bsx.vol_length),
- bd->num_sectors);
+ if (verbose)
+ exfat_err("too large sector count: %" PRIu64 ", expected: %llu\n",
+ le64_to_cpu(bs->bsx.vol_length),
+ bd->num_sectors);
goto err;
}
if (le32_to_cpu(bs->bsx.clu_count) * EXFAT_CLUSTER_SIZE(bs) >
bd->size) {
- exfat_err("too large cluster count: %u, expected: %u\n",
- le32_to_cpu(bs->bsx.clu_count),
- bd->num_clusters);
+ if (verbose)
+ exfat_err("too large cluster count: %u, expected: %u\n",
+ le32_to_cpu(bs->bsx.clu_count),
+ bd->num_clusters);
goto err;
}
return 0;
err:
free(bs);
- return -EINVAL;
+ return ret;
+}
+
+static int restore_boot_region(struct exfat_blk_dev *bd, unsigned int sect_size)
+{
+ int i;
+ char *sector;
+ int ret;
+
+ sector = malloc(sect_size);
+ if (!sector)
+ return -ENOMEM;
+
+ for (i = 0; i < 12; i++) {
+ if (exfat_read(bd->dev_fd, sector, sect_size,
+ BACKUP_BOOT_SEC_IDX * sect_size +
+ i * sect_size) !=
+ (ssize_t)sect_size) {
+ ret = -EIO;
+ goto free_sector;
+ }
+ if (i == 0)
+ ((struct pbr *)sector)->bsx.perc_in_use = 0xff;
+
+ if (exfat_write(bd->dev_fd, sector, sect_size,
+ BOOT_SEC_IDX * sect_size +
+ i * sect_size) !=
+ (ssize_t)sect_size) {
+ ret = -EIO;
+ goto free_sector;
+ }
+ }
+
+ if (fsync(bd->dev_fd)) {
+ ret = -EIO;
+ goto free_sector;
+ }
+ ret = 0;
+
+free_sector:
+ free(sector);
+ return ret;
+}
+
+static int exfat_boot_region_check(struct exfat *exfat, struct pbr **bs)
+{
+ struct pbr *boot_sect;
+ unsigned int sect_size;
+ int ret;
+
+ /* First, find out the exfat sector size */
+ boot_sect = malloc(sizeof(*boot_sect));
+ if (boot_sect == NULL)
+ return -ENOMEM;
+
+ if (exfat_read(exfat->blk_dev->dev_fd, boot_sect,
+ sizeof(*boot_sect), 0) != (ssize_t)sizeof(*boot_sect)) {
+ exfat_err("failed to read Main boot sector\n");
+ return -EIO;
+ }
+
+ sect_size = 1 << boot_sect->bsx.sect_size_bits;
+ free(boot_sect);
+
+ /* check boot regions */
+ ret = read_boot_region(exfat->blk_dev, bs,
+ BOOT_SEC_IDX, sect_size, true);
+ if (ret == -EINVAL && exfat_repair_ask(exfat, ER_BS_BOOT_REGION,
+ "boot region is corrupted. try to restore the region from backup"
+ )) {
+ const unsigned int sector_sizes[] = {512, 4096, 1024, 2048};
+ unsigned int i;
+
+ if (sect_size >= 512 && sect_size <= EXFAT_MAX_SECTOR_SIZE) {
+ ret = read_boot_region(exfat->blk_dev, bs,
+ BACKUP_BOOT_SEC_IDX, sect_size,
+ false);
+ if (!ret)
+ goto restore;
+ }
+
+ for (i = 0; i < sizeof(sector_sizes)/sizeof(sector_sizes[0]); i++) {
+ if (sector_sizes[i] == sect_size)
+ continue;
+
+ ret = read_boot_region(exfat->blk_dev, bs,
+ BACKUP_BOOT_SEC_IDX,
+ sector_sizes[i], false);
+ if (!ret) {
+ sect_size = sector_sizes[i];
+ goto restore;
+ }
+ }
+ exfat_err("backup boot region is also corrupted\n");
+ }
+
+ return ret;
+restore:
+ ret = restore_boot_region(exfat->blk_dev, sect_size);
+ if (ret) {
+ exfat_err("failed to restore boot region from backup\n");
+ free(*bs);
+ *bs = NULL;
+ }
+ return ret;
}
static void dentry_calc_checksum(struct exfat_dentry *dentry,
struct exfat_dentry *dentry;
int ret = 0;
uint16_t checksum;
+ bool valid = true;
ret = check_clus_chain(exfat, node);
if (ret < 0)
fsck_err(iter->parent, node,
"size %" PRIu64 " is greater than cluster heap\n",
node->size);
- ret = -EINVAL;
+ valid = false;
}
if (node->size == 0 && node->is_contiguous) {
dentry->stream_flags &= ~EXFAT_SF_CONTIGUOUS;
ret = 1;
} else
- ret = -EINVAL;
+ valid = false;
}
if ((node->attr & ATTR_SUBDIR) &&
fsck_err(iter->parent, node,
"directory size %" PRIu64 " is not divisible by %d\n",
node->size, exfat->clus_size);
- ret = -EINVAL;
+ valid = false;
}
checksum = file_calc_checksum(iter);
dentry->file_checksum = cpu_to_le16(checksum);
ret = 1;
} else
- ret = -EINVAL;
+ valid = false;
}
- return ret;
+ return valid ? ret : -EINVAL;
}
static int read_file_dentries(struct exfat_de_iter *iter,
exfat_err("failed to init locale/codeset\n");
opterr = 0;
- while ((c = getopt_long(argc, argv, "rynpVvh", opts, NULL)) != EOF) {
+ while ((c = getopt_long(argc, argv, "arynpVvh", opts, NULL)) != EOF) {
switch (c) {
case 'n':
if (ui.options & FSCK_OPTS_REPAIR_ALL)
usage(argv[0]);
ui.options |= FSCK_OPTS_REPAIR_YES;
break;
+ case 'a':
case 'p':
if (ui.options & FSCK_OPTS_REPAIR_ALL)
usage(argv[0]);
return FSCK_EXIT_OPERATION_ERROR;
}
- ret = read_boot_region(&bd, &bs);
- if (ret)
- goto err;
-
- exfat = alloc_exfat(&bd, bs);
+ exfat = (struct exfat *)calloc(1, sizeof(*exfat));
if (!exfat) {
+ exfat_err("failed to allocate exfat\n");
ret = -ENOMEM;
goto err;
}
+ exfat->blk_dev = &bd;
exfat->options = ui.options;
- if (exfat_mark_volume_dirty(exfat, true)) {
- ret = -EIO;
+ ret = exfat_boot_region_check(exfat, &bs);
+ if (ret)
goto err;
- }
- ret = boot_region_checksum(exfat);
+ ret = init_exfat(exfat, bs);
if (ret)
goto err;
+ if (exfat_mark_volume_dirty(exfat, true)) {
+ ret = -EIO;
+ goto err;
+ }
+
exfat_debug("verifying root directory...\n");
ret = exfat_root_dir_check(exfat);
if (ret) {
projects / sven / exfatprogs.git / blobdiff