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volume_id: fix endianess bug in linux_raid detection

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This commit is contained in:
Kay Sievers 2006-11-15 20:41:25 +01:00
parent 77ab93ed97
commit aa68c048f8
2 changed files with 4 additions and 9 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 = ${INSTALL} -m 755
SHLIB_CUR = 0
SHLIB_REV = 73
SHLIB_REV = 74
SHLIB_AGE = 0
SHLIB = libvolume_id.so.$(SHLIB_CUR).$(SHLIB_REV).$(SHLIB_AGE)

11
extras/volume_id/lib/linux_raid.c
View File

@ -27,7 +27,7 @@
#include "util.h"
static struct mdp_super_block {
uint32_t md_magic;
uint8_t md_magic[4];
uint32_t major_version;
uint32_t minor_version;
uint32_t patch_version;
@ -46,7 +46,7 @@ static struct mdp_super_block {
} PACKED *mdp;
#define MD_RESERVED_BYTES 0x10000
#define MD_MAGIC 0xa92b4efc
#define MD_MAGIC "\xa9\x2b\x4e\xfc"
int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
@ -56,7 +56,6 @@ int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
if (size < 0x10000)
return -1;
@ -64,24 +63,20 @@ int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size
buf = volume_id_get_buffer(id, off + sboff, 0x800);
if (buf == NULL)
return -1;
mdp = (struct mdp_super_block *) buf;
if (le32_to_cpu(mdp->md_magic) != MD_MAGIC)
if (memcmp(mdp->md_magic, MD_MAGIC, 4) != 0)
return -1;
memcpy(uuid, &mdp->set_uuid0, 4);
memcpy(&uuid[4], &mdp->set_uuid1, 12);
volume_id_set_uuid(id, uuid, UUID_DCE);
snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
le32_to_cpu(mdp->major_version),
le32_to_cpu(mdp->minor_version),
le32_to_cpu(mdp->patch_version));
dbg("found raid signature");
volume_id_set_usage(id, VOLUME_ID_RAID);
id->type = "linux_raid_member";
return 0;
}