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| author | Kay Sievers <kay.sievers@suse.de> | 2006-10-13 13:17:13 +0200 |
|---|---|---|
| committer | Kay Sievers <kay.sievers@suse.de> | 2006-10-13 13:17:13 +0200 |
| commit | 2658afdcf147afd384e27f0ac9019e27de7ba397 (patch) | |
| tree | 589418e36b30444c1f9de907826a9666970053c7 | |
| parent | f2f957c394ee3560b0c53ea41055d2d4ce457868 (diff) | |
| download | udev-2658afdcf147afd384e27f0ac9019e27de7ba397.tar.gz | |
volume_id: add checksum check to via_raid
| -rw-r--r-- | extras/volume_id/lib/Makefile | 2 | ||||
| -rw-r--r-- | extras/volume_id/lib/via_raid.c | 20 |
2 files changed, 20 insertions, 2 deletions
diff --git a/extras/volume_id/lib/Makefile b/extras/volume_id/lib/Makefile index 3e7d8c01..438d84df 100644 --- a/extras/volume_id/lib/Makefile +++ b/extras/volume_id/lib/Makefile @@ -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) 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"; |