static int probe_minix(blkid_probe pr, const struct blkid_idmag *mag)
{
unsigned char *ext;
const unsigned char *data;
int version = 0, swabme = 0;
data = blkid_probe_get_buffer(pr, 1024,
max(sizeof(struct minix_super_block),
sizeof(struct minix3_super_block)));
if (!data)
return errno ? -errno : 1;
version = get_minix_version(data, &swabme);
if (version < 1)
return 1;
if (version <= 2) {
struct minix_super_block *sb = (struct minix_super_block *) data;
int zones, ninodes, imaps, zmaps, firstz;
if (sb->s_imap_blocks == 0 || sb->s_zmap_blocks == 0 ||
sb->s_log_zone_size != 0)
return 1;
zones = version == 2 ? minix_swab32(swabme, sb->s_zones) :
minix_swab16(swabme, sb->s_nzones);
ninodes = minix_swab16(swabme, sb->s_ninodes);
imaps = minix_swab16(swabme, sb->s_imap_blocks);
zmaps = minix_swab16(swabme, sb->s_zmap_blocks);
firstz = minix_swab16(swabme, sb->s_firstdatazone);
/* sanity checks to be sure that the FS is really minix */
if (imaps * MINIX_BLOCK_SIZE * 8 < ninodes + 1)
return 1;
if (zmaps * MINIX_BLOCK_SIZE * 8 < zones - firstz + 1)
return 1;
} else if (version == 3) {
struct minix3_super_block *sb = (struct minix3_super_block *) data;
if (sb->s_imap_blocks == 0 || sb->s_zmap_blocks == 0)
return 1;
}
/* unfortunately, some parts of ext3 is sometimes possible to
* interpreted as minix superblock. So check for extN magic
* string. (For extN magic string and offsets see ext.c.)
*/
ext = blkid_probe_get_buffer(pr, 0x400 + 0x38, 2);
if (!ext)
return errno ? -errno : 1;
else if (memcmp(ext, "\123\357", 2) == 0)
return 1;
blkid_probe_sprintf_version(pr, "%d", version);
return 0;
}
/*
* Look for LABEL (name) in the FAT root directory.
*/
static unsigned char *search_fat_label(blkid_probe pr,
uint64_t offset, uint32_t entries)
{
struct vfat_dir_entry *ent, *dir = NULL;
uint32_t i;
DBG(DEBUG_LOWPROBE,
printf("\tlook for label in root-dir "
"(entries: %d, offset: %jd)\n", entries, offset));
if (!blkid_probe_is_tiny(pr)) {
/* large disk, read whole root directory */
dir = (struct vfat_dir_entry *)
blkid_probe_get_buffer(pr,
offset,
(blkid_loff_t) entries *
sizeof(struct vfat_dir_entry));
if (!dir)
return NULL;
}
for (i = 0; i < entries; i++) {
/*
* The root directory could be relatively large (4-16kB).
* Fortunately, the LABEL is usually the first entry in the
* directory. On tiny disks we call read() per entry.
*/
if (!dir)
ent = (struct vfat_dir_entry *)
blkid_probe_get_buffer(pr,
(blkid_loff_t) offset + (i *
sizeof(struct vfat_dir_entry)),
sizeof(struct vfat_dir_entry));
else
ent = &dir[i];
if (!ent || ent->name[0] == 0x00)
break;
if ((ent->name[0] == FAT_ENTRY_FREE) ||
(ent->cluster_high != 0 || ent->cluster_low != 0) ||
((ent->attr & FAT_ATTR_MASK) == FAT_ATTR_LONG_NAME))
continue;
if ((ent->attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) ==
FAT_ATTR_VOLUME_ID) {
DBG(DEBUG_LOWPROBE,
printf("\tfound fs LABEL at entry %d\n", i));
return ent->name;
}
}
return NULL;
}
static int swap_set_info(blkid_probe pr, const char *version)
{
struct swap_header_v1_2 *hdr;
/* Swap header always located at offset of 1024 bytes */
hdr = (struct swap_header_v1_2 *) blkid_probe_get_buffer(pr, 1024,
sizeof(struct swap_header_v1_2));
if (!hdr)
return -1;
/* SWAPSPACE2 - check for wrong version or zeroed pagecount */
if (strcmp(version, "2") == 0 &&
(hdr->version != 1 || hdr->lastpage == 0))
return -1;
/* arbitrary sanity check.. is there any garbage down there? */
if (hdr->padding[32] == 0 && hdr->padding[33] == 0) {
if (hdr->volume[0] && blkid_probe_set_label(pr, hdr->volume,
sizeof(hdr->volume)) < 0)
return -1;
if (hdr->uuid[0] && blkid_probe_set_uuid(pr, hdr->uuid) < 0)
return -1;
}
blkid_probe_set_version(pr, version);
return 0;
}
static int probe_swap(blkid_probe pr, const struct blkid_idmag *mag)
{
unsigned char *buf;
if (!mag)
return -1;
/* TuxOnIce keeps valid swap header at the end of the 1st page */
buf = blkid_probe_get_buffer(pr, 0, TOI_MAGIC_STRLEN);
if (!buf)
return -1;
if (memcmp(buf, TOI_MAGIC_STRING, TOI_MAGIC_STRLEN) == 0)
return 1; /* Ignore swap signature, it's TuxOnIce */
if (!memcmp(mag->magic, "SWAP-SPACE", mag->len)) {
/* swap v0 doesn't support LABEL or UUID */
blkid_probe_set_version(pr, "0");
return 0;
} else if (!memcmp(mag->magic, "SWAPSPACE2", mag->len))
return swap_set_info(pr, "1");
return -1;
}
static struct exfat_entry_label *find_label(blkid_probe pr,
const struct exfat_super_block *sb)
{
uint32_t cluster = le32_to_cpu(sb->rootdir_cluster);
uint64_t offset = cluster_to_offset(sb, cluster);
uint8_t *entry;
const size_t max_iter = 10000;
size_t i = 0;
for (; i < max_iter; i++) {
entry = (uint8_t *) blkid_probe_get_buffer(pr, offset,
EXFAT_ENTRY_SIZE);
if (!entry)
return NULL;
if (entry[0] == EXFAT_ENTRY_EOD)
return NULL;
if (entry[0] == EXFAT_ENTRY_LABEL)
return (struct exfat_entry_label *) entry;
offset += EXFAT_ENTRY_SIZE;
if (offset % CLUSTER_SIZE(sb) == 0) {
cluster = next_cluster(pr, sb, cluster);
if (cluster < EXFAT_FIRST_DATA_CLUSTER)
return NULL;
if (cluster > EXFAT_LAST_DATA_CLUSTER)
return NULL;
offset = cluster_to_offset(sb, cluster);
}
}
return NULL;
}
static int probe_viaraid(blkid_probe pr, const struct blkid_idmag *mag)
{
uint64_t off;
struct via_metadata *v;
if (pr->size < 0x10000)
return -1;
if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
return -1;
off = ((pr->size / 0x200)-1) * 0x200;
v = (struct via_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct via_metadata));
if (!v)
return -1;
if (le16_to_cpu(v->signature) != VIA_SIGNATURE)
return -1;
if (v->version_number > 2)
return -1;
if (!via_checksum(v))
return -1;
if (blkid_probe_sprintf_version(pr, "%u", v->version_number) != 0)
return -1;
if (blkid_probe_set_magic(pr, off,
sizeof(v->signature),
(unsigned char *) &v->signature))
return -1;
return 0;
}
static inline unsigned char *get_mac_block(
blkid_probe pr,
struct mac_driver_desc *md,
uint32_t num)
{
return blkid_probe_get_buffer(pr,
(blkid_loff_t) num * md->block_size, num);
}
static inline unsigned char *get_mac_block(
blkid_probe pr,
uint16_t block_size,
uint32_t num)
{
return blkid_probe_get_buffer(pr,
(blkid_loff_t) num * block_size, block_size);
}
/* 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 uint32_t next_cluster(blkid_probe pr,
const struct exfat_super_block *sb, uint32_t cluster)
{
uint32_t *next;
uint64_t fat_offset;
fat_offset = block_to_offset(sb, le32_to_cpu(sb->fat_block_start))
+ (uint64_t) cluster * sizeof(cluster);
next = (uint32_t *) blkid_probe_get_buffer(pr, fat_offset,
sizeof(uint32_t));
if (!next)
return 0;
return le32_to_cpu(*next);
}
/*
* reads superblock and returns:
* fc = feature_compat
* fi = feature_incompat
* frc = feature_ro_compat
*/
static struct ext2_super_block *ext_get_super(
blkid_probe pr, uint32_t *fc, uint32_t *fi, uint32_t *frc)
{
struct ext2_super_block *es;
es = (struct ext2_super_block *)
blkid_probe_get_buffer(pr, EXT_SB_OFF, 0x200);
if (!es)
return NULL;
if (fc)
*fc = le32_to_cpu(es->s_feature_compat);
if (fi)
*fi = le32_to_cpu(es->s_feature_incompat);
if (frc)
*frc = le32_to_cpu(es->s_feature_ro_compat);
return es;
}
static int probe_lsiraid(blkid_probe pr, const struct blkid_idmag *mag)
{
uint64_t off;
struct lsi_metadata *lsi;
if (pr->size < 0x10000)
return -1;
off = ((pr->size / 0x200) - 1) * 0x200;
lsi = (struct lsi_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct lsi_metadata));
if (!lsi)
return -1;
if (memcmp(lsi->sig, LSI_SIGNATURE, sizeof(LSI_SIGNATURE)-1) != 0)
return -1;
return 0;
}
static int probe_iswraid(blkid_probe pr, const struct blkid_idmag *mag)
{
uint64_t off;
struct isw_metadata *isw;
if (pr->size < 0x10000)
return -1;
off = ((pr->size / 0x200) - 2) * 0x200;
isw = (struct isw_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct isw_metadata));
if (!isw)
return -1;
if (memcmp(isw->sig, ISW_SIGNATURE, sizeof(ISW_SIGNATURE)-1) != 0)
return -1;
if (blkid_probe_sprintf_version(pr, "%6s",
&isw->sig[sizeof(ISW_SIGNATURE)-1]) != 0)
return -1;
return 0;
}
static int probe_nvraid(blkid_probe pr, const struct blkid_idmag *mag)
{
uint64_t off;
struct nv_metadata *nv;
if (pr->size < 0x10000)
return -1;
off = ((pr->size / 0x200) - 2) * 0x200;
nv = (struct nv_metadata *)
blkid_probe_get_buffer(pr,
off,
sizeof(struct nv_metadata));
if (!nv)
return -1;
if (memcmp(nv->vendor, NVIDIA_SIGNATURE, sizeof(NVIDIA_SIGNATURE)-1) != 0)
return -1;
if (blkid_probe_sprintf_version(pr, "%u", le16_to_cpu(nv->version)) != 0)
return -1;
return 0;
}
static inline unsigned char *get_lba_buffer(blkid_probe pr,
uint64_t lba, size_t bytes)
{
return blkid_probe_get_buffer(pr,
blkid_probe_get_sectorsize(pr) * lba, bytes);
}
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;
return 0;
}
static void zfs_extract_guid_name(blkid_probe pr, loff_t offset)
{
struct nvlist *nvl;
struct nvpair *nvp;
size_t left = 4096;
int found = 0;
offset = (offset & ~(VDEV_LABEL_SIZE - 1)) + VDEV_LABEL_NVPAIR;
/* Note that we currently assume that the desired fields are within
* the first 4k (left) of the nvlist. This is true for all pools
* I've seen, and simplifies this code somewhat, because we don't
* have to handle an nvpair crossing a buffer boundary. */
nvl = (struct nvlist *)blkid_probe_get_buffer(pr, offset, left);
if (nvl == NULL)
return;
nvdebug("zfs_extract: nvlist offset %llu\n", offset);
nvp = &nvl->nvl_nvpair;
while (left > sizeof(*nvp) && nvp->nvp_size != 0 && found < 3) {
int avail; /* tracks that name/value data fits in nvp_size */
int namesize;
nvp->nvp_size = be32_to_cpu(nvp->nvp_size);
nvp->nvp_namelen = be32_to_cpu(nvp->nvp_namelen);
avail = nvp->nvp_size - nvp->nvp_namelen - sizeof(*nvp);
nvdebug("left %zd nvp_size %u\n", left, nvp->nvp_size);
if (left < nvp->nvp_size || avail < 0)
break;
namesize = (nvp->nvp_namelen + 3) & ~3;
nvdebug("nvlist: size %u, namelen %u, name %*s\n",
nvp->nvp_size, nvp->nvp_namelen, nvp->nvp_namelen,
nvp->nvp_name);
if (strncmp(nvp->nvp_name, "name", nvp->nvp_namelen) == 0) {
struct nvstring *nvs = (void *)(nvp->nvp_name+namesize);
nvs->nvs_type = be32_to_cpu(nvs->nvs_type);
nvs->nvs_strlen = be32_to_cpu(nvs->nvs_strlen);
if (nvs->nvs_strlen > UINT_MAX - sizeof(*nvs))
break;
avail -= nvs->nvs_strlen + sizeof(*nvs);
nvdebug("nvstring: type %u string %*s\n", nvs->nvs_type,
nvs->nvs_strlen, nvs->nvs_string);
if (nvs->nvs_type == DATA_TYPE_STRING && avail >= 0)
blkid_probe_set_label(pr, nvs->nvs_string,
nvs->nvs_strlen);
found++;
} else if (strncmp(nvp->nvp_name, "guid",
nvp->nvp_namelen) == 0) {
struct nvuint64 *nvu = (void *)(nvp->nvp_name+namesize);
uint64_t nvu_value;
memcpy(&nvu_value, &nvu->nvu_value, sizeof(nvu_value));
nvu->nvu_type = be32_to_cpu(nvu->nvu_type);
nvu_value = be64_to_cpu(nvu_value);
avail -= sizeof(*nvu);
nvdebug("nvuint64: type %u value %"PRIu64"\n",
nvu->nvu_type, nvu_value);
if (nvu->nvu_type == DATA_TYPE_UINT64 && avail >= 0)
blkid_probe_sprintf_value(pr, "UUID_SUB",
"%"PRIu64, nvu_value);
found++;
} else if (strncmp(nvp->nvp_name, "pool_guid",
nvp->nvp_namelen) == 0) {
struct nvuint64 *nvu = (void *)(nvp->nvp_name+namesize);
uint64_t nvu_value;
memcpy(&nvu_value, &nvu->nvu_value, sizeof(nvu_value));
nvu->nvu_type = be32_to_cpu(nvu->nvu_type);
nvu_value = be64_to_cpu(nvu_value);
avail -= sizeof(*nvu);
nvdebug("nvuint64: type %u value %"PRIu64"\n",
nvu->nvu_type, nvu_value);
if (nvu->nvu_type == DATA_TYPE_UINT64 && avail >= 0)
blkid_probe_sprintf_uuid(pr, (unsigned char *)
&nvu_value,
sizeof(nvu_value),
"%"PRIu64, nvu_value);
found++;
}
if (left > nvp->nvp_size)
left -= nvp->nvp_size;
else
left = 0;
nvp = (struct nvpair *)((char *)nvp + nvp->nvp_size);
}
}
/* FAT label extraction from the root directory taken from Kay
* Sievers's volume_id library */
static int probe_vfat(blkid_probe pr, const struct blkid_idmag *mag)
{
struct vfat_super_block *vs;
struct msdos_super_block *ms;
const unsigned char *vol_label = 0;
unsigned char *vol_serno = NULL, vol_label_buf[11];
uint16_t sector_size = 0, reserved;
uint32_t cluster_count, fat_size;
const char *version = NULL;
ms = blkid_probe_get_sb(pr, mag, struct msdos_super_block);
if (!ms)
return errno ? -errno : 1;
vs = blkid_probe_get_sb(pr, mag, struct vfat_super_block);
if (!vs)
return errno ? -errno : 1;
if (!fat_valid_superblock(pr, mag, ms, vs, &cluster_count, &fat_size))
return 1;
sector_size = unaligned_le16(&ms->ms_sector_size);
reserved = le16_to_cpu(ms->ms_reserved);
if (ms->ms_fat_length) {
/* the label may be an attribute in the root directory */
uint32_t root_start = (reserved + fat_size) * sector_size;
uint32_t root_dir_entries = unaligned_le16(&vs->vs_dir_entries);
vol_label = search_fat_label(pr, root_start, root_dir_entries);
if (vol_label) {
memcpy(vol_label_buf, vol_label, 11);
vol_label = vol_label_buf;
}
if (!vol_label || !memcmp(vol_label, no_name, 11))
vol_label = ms->ms_label;
vol_serno = ms->ms_serno;
blkid_probe_set_value(pr, "SEC_TYPE", (unsigned char *) "msdos",
sizeof("msdos"));
if (cluster_count < FAT12_MAX)
version = "FAT12";
else if (cluster_count < FAT16_MAX)
version = "FAT16";
} else if (vs->vs_fat32_length) {
unsigned char *buf;
uint16_t fsinfo_sect;
int maxloop = 100;
/* Search the FAT32 root dir for the label attribute */
uint32_t buf_size = vs->vs_cluster_size * sector_size;
uint32_t start_data_sect = reserved + fat_size;
uint32_t entries = le32_to_cpu(vs->vs_fat32_length) *
sector_size / sizeof(uint32_t);
uint32_t next = le32_to_cpu(vs->vs_root_cluster);
while (next && next < entries && --maxloop) {
uint32_t next_sect_off;
uint64_t next_off, fat_entry_off;
int count;
next_sect_off = (next - 2) * vs->vs_cluster_size;
next_off = (uint64_t)(start_data_sect + next_sect_off) *
sector_size;
count = buf_size / sizeof(struct vfat_dir_entry);
vol_label = search_fat_label(pr, next_off, count);
if (vol_label) {
memcpy(vol_label_buf, vol_label, 11);
vol_label = vol_label_buf;
break;
}
/* get FAT entry */
fat_entry_off = ((uint64_t) reserved * sector_size) +
(next * sizeof(uint32_t));
buf = blkid_probe_get_buffer(pr, fat_entry_off, buf_size);
if (buf == NULL)
break;
/* set next cluster */
next = le32_to_cpu(*((uint32_t *) buf)) & 0x0fffffff;
}
version = "FAT32";
if (!vol_label || !memcmp(vol_label, no_name, 11))
vol_label = vs->vs_label;
vol_serno = vs->vs_serno;
/*
* FAT32 should have a valid signature in the fsinfo block,
* but also allow all bytes set to '\0', because some volumes
* do not set the signature at all.
*/
fsinfo_sect = le16_to_cpu(vs->vs_fsinfo_sector);
if (fsinfo_sect) {
struct fat32_fsinfo *fsinfo;
buf = blkid_probe_get_buffer(pr,
(blkid_loff_t) fsinfo_sect * sector_size,
sizeof(struct fat32_fsinfo));
if (buf == NULL)
return errno ? -errno : 1;
fsinfo = (struct fat32_fsinfo *) buf;
if (memcmp(fsinfo->signature1, "\x52\x52\x61\x41", 4) != 0 &&
memcmp(fsinfo->signature1, "\x52\x52\x64\x41", 4) != 0 &&
memcmp(fsinfo->signature1, "\x00\x00\x00\x00", 4) != 0)
return 1;
if (memcmp(fsinfo->signature2, "\x72\x72\x41\x61", 4) != 0 &&
memcmp(fsinfo->signature2, "\x00\x00\x00\x00", 4) != 0)
return 1;
}
}
if (vol_label && memcmp(vol_label, no_name, 11))
blkid_probe_set_label(pr, (unsigned char *) vol_label, 11);
/* We can't just print them as %04X, because they are unaligned */
if (vol_serno)
blkid_probe_sprintf_uuid(pr, vol_serno, 4, "%02X%02X-%02X%02X",
vol_serno[3], vol_serno[2], vol_serno[1], vol_serno[0]);
if (version)
blkid_probe_set_version(pr, version);
return 0;
}
