From e60683a0d553b6488c564863f4e48954944fb0f8 Mon Sep 17 00:00:00 2001
From: bigbiff bigbiff <bigbiff@teamw.in>
Date: Fri, 22 Feb 2013 20:55:50 -0500
Subject: use libblkid to get filesystem type we can now use libblkid to detect
 exfat

---
 libblkid/via_raid.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 libblkid/via_raid.c

(limited to 'libblkid/via_raid.c')

diff --git a/libblkid/via_raid.c b/libblkid/via_raid.c
new file mode 100644
index 000000000..eba7e4bf2
--- /dev/null
+++ b/libblkid/via_raid.c
@@ -0,0 +1,89 @@
+/*
+ * 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 <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+struct via_metadata {
+	uint16_t	signature;
+	uint8_t		version_number;
+	struct via_array {
+		uint16_t	disk_bit_mask;
+		uint8_t		disk_array_ex;
+		uint32_t	capacity_low;
+		uint32_t	capacity_high;
+		uint32_t	serial_checksum;
+	} __attribute__((packed)) array;
+	uint32_t	serial_checksum[8];
+	uint8_t		checksum;
+} __attribute__((packed));
+
+#define VIA_SIGNATURE		0xAA55
+
+/* 8 bit checksum on first 50 bytes of metadata. */
+static uint8_t via_checksum(struct via_metadata *v)
+{
+	uint8_t i = 50, cs = 0;
+
+	while (i--)
+		cs += ((uint8_t*) v)[i];
+
+	return cs == v->checksum;
+}
+
+static int probe_viaraid(blkid_probe pr,
+		const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+	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;
+}
+
+const struct blkid_idinfo viaraid_idinfo = {
+	.name		= "via_raid_member",
+	.usage		= BLKID_USAGE_RAID,
+	.probefunc	= probe_viaraid,
+	.magics		= BLKID_NONE_MAGIC
+};
+
+
-- 
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