volume_id: rename subdirectory

1 files changed, 75 insertions, 0 deletions

diff --git a/extras/volume_id/lib/via_raid.c b/extras/volume_id/lib/via_raid.c
new file mode 100644
index 0000000000..42cb098065
--- /dev/null
+++ b/extras/volume_id/lib/via_raid.c
@@ -0,0 +1,75 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "libvolume_id.h"
+#include "util.h"
+
+struct via_meta {
+	uint16_t	signature;
+	uint8_t		version_number;
+	struct via_array {
+		uint16_t	disk_bits;
+		uint8_t		disk_array_ex;
+		uint32_t	capacity_low;
+		uint32_t	capacity_high;
+		uint32_t	serial_checksum;
+	} PACKED array;
+	uint32_t	serial_checksum[8];
+	uint8_t		checksum;
+} PACKED;
+
+#define VIA_SIGNATURE		0xAA55
+
+int volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
+{
+	const uint8_t *buf;
+	uint64_t meta_off;
+	struct via_meta *via;
+
+	dbg("probing at offset 0x%llx, size 0x%llx",
+	    (unsigned long long) off, (unsigned long long) size);
+
+	if (size < 0x10000)
+		return -1;
+
+	meta_off = ((size / 0x200)-1) * 0x200;
+
+	buf = volume_id_get_buffer(id, off + meta_off, 0x200);
+	if (buf == NULL)
+		return -1;
+
+	via = (struct via_meta *) buf;
+	if (le16_to_cpu(via->signature) !=  VIA_SIGNATURE)
+		return -1;
+
+	if (via->version_number > 1)
+		return -1;
+
+	volume_id_set_usage(id, VOLUME_ID_RAID);
+	snprintf(id->type_version, sizeof(id->type_version)-1, "%u", via->version_number);
+	id->type = "via_raid_member";
+
+	return 0;
+}