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volume_id: add checksum check to via_raid

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This commit is contained in:
Kay Sievers 2006-10-13 13:17:13 +02:00
parent f2f957c394
commit 2658afdcf1
2 changed files with 20 additions and 2 deletions
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2
extras/volume_id/lib/Makefile
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@ -13,7 +13,7 @@ INSTALL_DATA = ${INSTALL} -m 644
INSTALL_LIB = ${INSTALL} -m 755
SHLIB_CUR = 0
SHLIB_REV = 72
SHLIB_REV = 73
SHLIB_AGE = 0
SHLIB = libvolume_id.so.$(SHLIB_CUR).$(SHLIB_REV).$(SHLIB_AGE)

20
extras/volume_id/lib/via_raid.c
View File

@ -3,6 +3,9 @@
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* Based on information taken from dmraid:
* Copyright (C) 2004-2006 Heinz Mauelshagen, Red Hat GmbH
*
* 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.
@ -30,7 +33,7 @@ struct via_meta {
uint16_t signature;
uint8_t version_number;
struct via_array {
uint16_t disk_bits;
uint16_t disk_bit_mask;
uint8_t disk_array_ex;
uint32_t capacity_low;
uint32_t capacity_high;
@ -42,6 +45,18 @@ struct via_meta {
#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;
}
int volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
const uint8_t *buf;
@ -67,6 +82,9 @@ int volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
if (via->version_number > 1)
return -1;
if (!meta_checksum(via))
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";