diff options
Diffstat (limited to 'extras/volume_id/lib/via_raid.c')
| -rw-r--r-- | extras/volume_id/lib/via_raid.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/extras/volume_id/lib/via_raid.c b/extras/volume_id/lib/via_raid.c index 42cb0980..62c165e0 100644 --- a/extras/volume_id/lib/via_raid.c +++ b/extras/volume_id/lib/via_raid.c @@ -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"; |