From 46be4f093b7a02a3678d6cb802f8532b92b61ccc Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 9 Sep 2008 11:38:39 +0200
Subject: [PATCH] blkid: add VIA RAID

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 libs/blkid/src/probe.c             |  3 +-
 libs/blkid/src/probers/Makefile.am |  3 +-
 libs/blkid/src/probers/probers.h   |  1 +
 libs/blkid/src/probers/via_raid.c  | 83 ++++++++++++++++++++++++++++++
 4 files changed, 88 insertions(+), 2 deletions(-)
 create mode 100644 libs/blkid/src/probers/via_raid.c

diff --git a/libs/blkid/src/probe.c b/libs/blkid/src/probe.c
index ac389873..4fc3b83e 100644
--- a/libs/blkid/src/probe.c
+++ b/libs/blkid/src/probe.c
@@ -45,7 +45,8 @@ static const struct blkid_idinfo *idinfos[] =
 	&lsi_idinfo,
 	&nvraid_idinfo,
 	&pdcraid_idinfo,
-	&silraid_idinfo
+	&silraid_idinfo,
+	&viaraid_idinfo
 };
 
 #ifndef ARRAY_SIZE
diff --git a/libs/blkid/src/probers/Makefile.am b/libs/blkid/src/probers/Makefile.am
index 0b36608e..5a5bf7e5 100644
--- a/libs/blkid/src/probers/Makefile.am
+++ b/libs/blkid/src/probers/Makefile.am
@@ -14,6 +14,7 @@ libprobers_a_SOURCES =	probers.h \
 			lsi_raid.c \
 			nvidia_raid.c \
 			promise_raid.c \
-			silicon_raid.c
+			silicon_raid.c \
+			via_raid.c
 
 all-local: $(lib_LIBRARIES)
diff --git a/libs/blkid/src/probers/probers.h b/libs/blkid/src/probers/probers.h
index 10e2aee5..e5313364 100644
--- a/libs/blkid/src/probers/probers.h
+++ b/libs/blkid/src/probers/probers.h
@@ -26,5 +26,6 @@ extern const struct blkid_idinfo lsi_idinfo;
 extern const struct blkid_idinfo nvraid_idinfo;
 extern const struct blkid_idinfo pdcraid_idinfo;
 extern const struct blkid_idinfo silraid_idinfo;
+extern const struct blkid_idinfo viaraid_idinfo;
 
 #endif /* _BLKID_PROBE_H */
diff --git a/libs/blkid/src/probers/via_raid.c b/libs/blkid/src/probers/via_raid.c
new file mode 100644
index 00000000..2a2557ca
--- /dev/null
+++ b/libs/blkid/src/probers/via_raid.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ * Copyright (C) 2004-2006 Heinz Mauelshagen, Red Hat GmbH
+ *
+ * This file 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "blkidP.h"
+
+struct via_meta {
+	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;
+	} array;
+	uint32_t	serial_checksum[8];
+	uint8_t		checksum;
+};
+
+#define VIA_SIGNATURE		0xAA55
+
+/* 8 bit checksum on first 50 bytes of metadata. */
+static uint8_t meta_checksum(struct via_meta *via)
+{
+	uint8_t i = 50, sum = 0;
+
+	while (i--)
+		sum += ((uint8_t*) via)[i];
+
+	return sum == via->checksum;
+}
+
+static int probe_viaraid(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	uint64_t meta_off;
+	struct via_meta *via;
+
+	if (pr->size < 0x10000)
+		return -1;
+
+	meta_off = ((pr->size / 0x200)-1) * 0x200;
+
+	via = (struct via_meta *) blkid_probe_get_buffer(pr, meta_off, 0x200);
+	if (!via)
+		return -1;
+	if (le16_to_cpu(via->signature) != VIA_SIGNATURE)
+		return -1;
+	if (via->version_number > 1)
+		return -1;
+	if (!meta_checksum(via))
+		return -1;
+	if (blkid_probe_sprintf_version(pr, "%u", via->version_number) != 0)
+		return -1;
+	return 0;
+}
+
+const struct blkid_idinfo viaraid_idinfo = {
+	.name		= "via_raid_member",
+	.usage		= BLKID_USAGE_RAID,
+	.probefunc	= probe_viaraid
+};
+
+
-- 
2.39.5