use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/silicon_raid.c b/libblkid/silicon_raid.c
new file mode 100644
index 0000000..496a3e7
--- /dev/null
+++ b/libblkid/silicon_raid.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * 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 <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+#include <stddef.h>
+
+#include "superblocks.h"
+
+struct silicon_metadata {
+ uint8_t unknown0[0x2E];
+ uint8_t ascii_version[0x36 - 0x2E];
+ int8_t diskname[0x56 - 0x36];
+ int8_t unknown1[0x60 - 0x56];
+ uint32_t magic;
+ int8_t unknown1a[0x6C - 0x64];
+ uint32_t array_sectors_low;
+ uint32_t array_sectors_high;
+ int8_t unknown2[0x78 - 0x74];
+ uint32_t thisdisk_sectors;
+ int8_t unknown3[0x100 - 0x7C];
+ int8_t unknown4[0x104 - 0x100];
+ uint16_t product_id;
+ uint16_t vendor_id;
+ uint16_t minor_ver;
+ uint16_t major_ver;
+ uint8_t seconds;
+ uint8_t minutes;
+ uint8_t hour;
+ uint8_t day;
+ uint8_t month;
+ uint8_t year;
+ uint16_t raid0_stride;
+ int8_t unknown6[0x116 - 0x114];
+ uint8_t disk_number;
+ uint8_t type; /* SILICON_TYPE_* */
+ int8_t drives_per_striped_set;
+ int8_t striped_set_number;
+ int8_t drives_per_mirrored_set;
+ int8_t mirrored_set_number;
+ uint32_t rebuild_ptr_low;
+ uint32_t rebuild_ptr_high;
+ uint32_t incarnation_no;
+ uint8_t member_status;
+ uint8_t mirrored_set_state; /* SILICON_MIRROR_* */
+ uint8_t reported_device_location;
+ uint8_t idechannel;
+ uint8_t auto_rebuild;
+ uint8_t unknown8;
+ uint8_t text_type[0x13E - 0x12E];
+ uint16_t checksum1;
+ int8_t assumed_zeros[0x1FE - 0x140];
+ uint16_t checksum2;
+} __attribute__((packed));
+
+#define SILICON_MAGIC 0x2F000000
+
+static int checksum(struct silicon_metadata *sil)
+{
+ int sum = 0;
+ unsigned short count = offsetof(struct silicon_metadata, checksum1) / 2;
+ uint16_t *p = (uint16_t *) sil;
+
+ while (count--)
+ sum += *p++;
+
+ return (-sum & 0xFFFF) == le16_to_cpu(sil->checksum1);
+}
+
+static int probe_silraid(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ uint64_t off;
+ struct silicon_metadata *sil;
+
+ if (pr->size < 0x10000)
+ return -1;
+ if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
+ return -1;
+
+ off = ((pr->size / 0x200) - 1) * 0x200;
+
+ sil = (struct silicon_metadata *)
+ blkid_probe_get_buffer(pr, off,
+ sizeof(struct silicon_metadata));
+ if (!sil)
+ return -1;
+
+ if (le32_to_cpu(sil->magic) != SILICON_MAGIC)
+ return -1;
+ if (sil->disk_number >= 8)
+ return -1;
+ if (!checksum(sil)) {
+ DBG(DEBUG_LOWPROBE, printf("silicon raid: incorrect checksum\n"));
+ return -1;
+ }
+
+ if (blkid_probe_sprintf_version(pr, "%u.%u",
+ le16_to_cpu(sil->major_ver),
+ le16_to_cpu(sil->minor_ver)) != 0)
+ return -1;
+
+ if (blkid_probe_set_magic(pr,
+ off + offsetof(struct silicon_metadata, magic),
+ sizeof(sil->magic),
+ (unsigned char *) &sil->magic))
+ return -1;
+ return 0;
+}
+
+const struct blkid_idinfo silraid_idinfo = {
+ .name = "silicon_medley_raid_member",
+ .usage = BLKID_USAGE_RAID,
+ .probefunc = probe_silraid,
+ .magics = BLKID_NONE_MAGIC
+};
+
+