use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/ddf_raid.c b/libblkid/ddf_raid.c
new file mode 100644
index 0000000..24df421
--- /dev/null
+++ b/libblkid/ddf_raid.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * Inspired by libvolume_id by
+ * Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+/* http://www.snia.org/standards/home */
+#define DDF_GUID_LENGTH 24
+#define DDF_REV_LENGTH 8
+#define DDF_MAGIC 0xDE11DE11
+
+
+struct ddf_header {
+ uint32_t signature;
+ uint32_t crc;
+ uint8_t guid[DDF_GUID_LENGTH];
+ char ddf_rev[8]; /* 01.02.00 */
+ uint32_t seq; /* starts at '1' */
+ uint32_t timestamp;
+ uint8_t openflag;
+ uint8_t foreignflag;
+ uint8_t enforcegroups;
+ uint8_t pad0; /* 0xff */
+ uint8_t pad1[12]; /* 12 * 0xff */
+ /* 64 bytes so far */
+ uint8_t header_ext[32]; /* reserved: fill with 0xff */
+ uint64_t primary_lba;
+ uint64_t secondary_lba;
+ uint8_t type;
+ uint8_t pad2[3]; /* 0xff */
+ uint32_t workspace_len; /* sectors for vendor space -
+ * at least 32768(sectors) */
+ uint64_t workspace_lba;
+ uint16_t max_pd_entries; /* one of 15, 63, 255, 1023, 4095 */
+ uint16_t max_vd_entries; /* 2^(4,6,8,10,12)-1 : i.e. as above */
+ uint16_t max_partitions; /* i.e. max num of configuration
+ record entries per disk */
+ uint16_t config_record_len; /* 1 +ROUNDUP(max_primary_element_entries
+ *12/512) */
+ uint16_t max_primary_element_entries; /* 16, 64, 256, 1024, or 4096 */
+ uint8_t pad3[54]; /* 0xff */
+ /* 192 bytes so far */
+ uint32_t controller_section_offset;
+ uint32_t controller_section_length;
+ uint32_t phys_section_offset;
+ uint32_t phys_section_length;
+ uint32_t virt_section_offset;
+ uint32_t virt_section_length;
+ uint32_t config_section_offset;
+ uint32_t config_section_length;
+ uint32_t data_section_offset;
+ uint32_t data_section_length;
+ uint32_t bbm_section_offset;
+ uint32_t bbm_section_length;
+ uint32_t diag_space_offset;
+ uint32_t diag_space_length;
+ uint32_t vendor_offset;
+ uint32_t vendor_length;
+ /* 256 bytes so far */
+ uint8_t pad4[256]; /* 0xff */
+} __attribute__((packed));
+
+static int probe_ddf(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ int hdrs[] = { 1, 257 };
+ size_t i;
+ struct ddf_header *ddf = NULL;
+ char version[DDF_REV_LENGTH + 1];
+ uint64_t off, lba;
+
+ if (pr->size < 0x30000)
+ return -1;
+
+ for (i = 0; i < ARRAY_SIZE(hdrs); i++) {
+ off = ((pr->size / 0x200) - hdrs[i]) * 0x200;
+
+ ddf = (struct ddf_header *) blkid_probe_get_buffer(pr,
+ off,
+ sizeof(struct ddf_header));
+ if (!ddf)
+ return -1;
+
+ if (ddf->signature == cpu_to_be32(DDF_MAGIC) ||
+ ddf->signature == cpu_to_le32(DDF_MAGIC))
+ break;
+ ddf = NULL;
+ }
+
+ if (!ddf)
+ return -1;
+
+ lba = ddf->signature == cpu_to_be32(DDF_MAGIC) ?
+ be64_to_cpu(ddf->primary_lba) :
+ le64_to_cpu(ddf->primary_lba);
+
+ if (lba > 0) {
+ /* check primary header */
+ unsigned char *buf;
+
+ buf = blkid_probe_get_buffer(pr,
+ lba << 9, sizeof(ddf->signature));
+ if (!buf || memcmp(buf, &ddf->signature, 4))
+ return -1;
+ }
+
+ blkid_probe_strncpy_uuid(pr, ddf->guid, sizeof(ddf->guid));
+
+ memcpy(version, ddf->ddf_rev, sizeof(ddf->ddf_rev));
+ *(version + sizeof(ddf->ddf_rev)) = '\0';
+
+ if (blkid_probe_set_version(pr, version) != 0)
+ return -1;
+ if (blkid_probe_set_magic(pr, off,
+ sizeof(ddf->signature),
+ (unsigned char *) &ddf->signature))
+ return -1;
+ return 0;
+}
+
+const struct blkid_idinfo ddfraid_idinfo = {
+ .name = "ddf_raid_member",
+ .usage = BLKID_USAGE_RAID,
+ .probefunc = probe_ddf,
+ .magics = BLKID_NONE_MAGIC
+};
+
+