static int probe_exfat(blkid_probe pr, const struct blkid_idmag *mag)
{
struct exfat_super_block *sb;
struct exfat_entry_label *label;
sb = blkid_probe_get_sb(pr, mag, struct exfat_super_block);
if (!sb || !CLUSTER_SIZE(sb))
return errno ? -errno : BLKID_PROBE_NONE;
label = find_label(pr, sb);
if (label)
blkid_probe_set_utf8label(pr, label->name,
min(label->length * 2, 30), BLKID_ENC_UTF16LE);
else if (errno)
return -errno;
blkid_probe_sprintf_uuid(pr, sb->volume_serial, 4,
"%02hhX%02hhX-%02hhX%02hhX",
sb->volume_serial[3], sb->volume_serial[2],
sb->volume_serial[1], sb->volume_serial[0]);
blkid_probe_sprintf_version(pr, "%u.%u",
sb->version.vermaj, sb->version.vermin);
return BLKID_PROBE_OK;
}
/* iso9660 [+ Microsoft Joliet Extension] */
static int probe_iso9660(blkid_probe pr, const struct blkid_idmag *mag)
{
struct iso_volume_descriptor *iso;
unsigned char label[32];
int i;
int off;
if (strcmp(mag->magic, "CDROM") == 0)
return probe_iso9660_hsfs(pr, mag);
iso = blkid_probe_get_sb(pr, mag, struct iso_volume_descriptor);
if (!iso)
return -1;
memcpy(label, iso->volume_id, sizeof(label));
/* Joliet Extension */
off = ISO_VD_OFFSET;
for (i = 0; i < ISO_VD_MAX; i++) {
iso = (struct iso_volume_descriptor *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct iso_volume_descriptor));
if (iso == NULL || iso->vd_type == ISO_VD_END)
break;
if (iso->vd_type != ISO_VD_SUPPLEMENTARY)
continue;
if (memcmp(iso->escape_sequences, "%/@", 3) == 0 ||
memcmp(iso->escape_sequences, "%/C", 3) == 0 ||
memcmp(iso->escape_sequences, "%/E", 3) == 0) {
blkid_probe_set_version(pr, "Joliet Extension");
/* Is the Joliet (UTF16BE) label equal to the label in
* the PVD? If yes, use PVD label. The Jolied version
* of the label could be trimed (because UTF16..).
*/
if (ascii_eq_utf16be(label, iso->volume_id, 32))
break;
blkid_probe_set_utf8label(pr,
iso->volume_id,
sizeof(iso->volume_id),
BLKID_ENC_UTF16BE);
goto has_label;
}
off += ISO_SECTOR_SIZE;
}
/* Joliet not found, let use standard iso label */
blkid_probe_set_label(pr, label, sizeof(label));
has_label:
return 0;
}
static int probe_hfsplus(blkid_probe pr, const struct blkid_idmag *mag)
{
struct hfsplus_extent extents[HFSPLUS_EXTENT_COUNT];
struct hfsplus_bnode_descriptor *descr;
struct hfsplus_bheader_record *bnode;
struct hfsplus_catalog_key *key;
struct hfsplus_vol_header *hfsplus;
struct hfs_mdb *sbd;
unsigned int alloc_block_size;
unsigned int alloc_first_block;
unsigned int embed_first_block;
unsigned int off = 0;
unsigned int blocksize;
unsigned int cat_block;
unsigned int ext_block_start;
unsigned int ext_block_count;
unsigned int record_count;
unsigned int leaf_node_head;
unsigned int leaf_node_count;
unsigned int leaf_node_size;
unsigned int leaf_block;
int ext;
uint64_t leaf_off;
unsigned char *buf;
sbd = blkid_probe_get_sb(pr, mag, struct hfs_mdb);
if (!sbd)
return -1;
/* Check for a HFS+ volume embedded in a HFS volume */
if (memcmp(sbd->signature, "BD", 2) == 0) {
if ((memcmp(sbd->embed_sig, "H+", 2) != 0) &&
(memcmp(sbd->embed_sig, "HX", 2) != 0))
/* This must be an HFS volume, so fail */
return 1;
alloc_block_size = be32_to_cpu(sbd->al_blk_size);
alloc_first_block = be16_to_cpu(sbd->al_bl_st);
embed_first_block = be16_to_cpu(sbd->embed_startblock);
off = (alloc_first_block * 512) +
(embed_first_block * alloc_block_size);
buf = blkid_probe_get_buffer(pr,
off + (mag->kboff * 1024),
sizeof(struct hfsplus_vol_header));
hfsplus = (struct hfsplus_vol_header *) buf;
} else
hfsplus = blkid_probe_get_sb(pr, mag,
struct hfsplus_vol_header);
if (!hfsplus)
return -1;
if ((memcmp(hfsplus->signature, "H+", 2) != 0) &&
(memcmp(hfsplus->signature, "HX", 2) != 0))
return 1;
hfs_set_uuid(pr, hfsplus->finder_info.id, sizeof(hfsplus->finder_info.id));
blocksize = be32_to_cpu(hfsplus->blocksize);
if (blocksize < HFSPLUS_SECTOR_SIZE)
return -1;
memcpy(extents, hfsplus->cat_file.extents, sizeof(extents));
cat_block = be32_to_cpu(extents[0].start_block);
buf = blkid_probe_get_buffer(pr,
off + ((blkid_loff_t) cat_block * blocksize), 0x2000);
if (!buf)
return 0;
bnode = (struct hfsplus_bheader_record *)
&buf[sizeof(struct hfsplus_bnode_descriptor)];
leaf_node_head = be32_to_cpu(bnode->leaf_head);
leaf_node_size = be16_to_cpu(bnode->node_size);
leaf_node_count = be32_to_cpu(bnode->leaf_count);
if (leaf_node_count == 0)
return 0;
leaf_block = (leaf_node_head * leaf_node_size) / blocksize;
/* get physical location */
for (ext = 0; ext < HFSPLUS_EXTENT_COUNT; ext++) {
ext_block_start = be32_to_cpu(extents[ext].start_block);
ext_block_count = be32_to_cpu(extents[ext].block_count);
if (ext_block_count == 0)
return 0;
/* this is our extent */
if (leaf_block < ext_block_count)
break;
leaf_block -= ext_block_count;
}
if (ext == HFSPLUS_EXTENT_COUNT)
return 0;
leaf_off = (ext_block_start + leaf_block) * blocksize;
buf = blkid_probe_get_buffer(pr,
(blkid_loff_t) off + leaf_off,
leaf_node_size);
if (!buf)
return 0;
descr = (struct hfsplus_bnode_descriptor *) buf;
record_count = be16_to_cpu(descr->num_recs);
if (record_count == 0)
return 0;
if (descr->type != HFS_NODE_LEAF)
return 0;
key = (struct hfsplus_catalog_key *)
&buf[sizeof(struct hfsplus_bnode_descriptor)];
if (be32_to_cpu(key->parent_id) != HFSPLUS_POR_CNID)
return 0;
blkid_probe_set_utf8label(pr, key->unicode,
be16_to_cpu(key->unicode_len) * 2,
BLKID_ENC_UTF16BE);
return 0;
}
