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volume_id: better DDF raid detection

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This commit is contained in:
Kay Sievers
2008-10-03 15:01:39 +02:00
parent ab7430c5d8
commit 59315eeae4
1 changed files with 29 additions and 6 deletions
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extras/volume_id/lib/ddf_raid.c
+29 -6
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@@ -34,12 +34,11 @@
/* http://www.snia.org/standards/home */
#define DDF_HEADER 0xDE11DE11
#define DDF_GUID_LENGTH 24
#define DDF_REV_LENGTH 8
struct ddf_header {
uint32_t signature;
uint8_t signature[4];
uint32_t crc;
uint8_t guid[DDF_GUID_LENGTH];
uint8_t ddf_rev[DDF_REV_LENGTH];
@@ -47,23 +46,47 @@ struct ddf_header {
int volume_id_probe_ddf_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
uint64_t ddf_off = ((size / 0x200)-1) * 0x200;
uint64_t ddf_off;
const uint8_t *buf;
struct ddf_header *ddf;
info("probing at offset 0x%llx, size 0x%llx\n",
(unsigned long long) off, (unsigned long long) size);
if (size < 0x10000)
(unsigned long long)off, (unsigned long long)size);
if (size < 0x30000)
return -1;
/* header at last sector */
ddf_off = ((size / 0x200)-1) * 0x200;
buf = volume_id_get_buffer(id, off + ddf_off, 0x200);
if (buf == NULL)
return -1;
ddf = (struct ddf_header *) buf;
if (memcmp(ddf->signature, "\x11\xde\x11\xde", 4) == 0) {
info("header (little endian) found at %llu\n", (unsigned long long)(off + ddf_off));
goto found;
}
if (memcmp(ddf->signature, "\xde\x11\xde\x11", 4) == 0) {
info("header (big endian) found at %llu\n", (unsigned long long)(off + ddf_off));
goto found;
}
if (ddf->signature != cpu_to_be32(DDF_HEADER))
/* adaptec non-standard header location */
ddf_off = ((size / 0x200)-257) * 0x200;
buf = volume_id_get_buffer(id, off + ddf_off, 0x200);
if (buf == NULL)
return -1;
ddf = (struct ddf_header *) buf;
if (memcmp(ddf->signature, "\x11\xde\x11\xde", 4) == 0) {
info("header adaptec (little endian) found at %llu\n", (unsigned long long)(off + ddf_off));
goto found;
}
if (memcmp(ddf->signature, "\xde\x11\xde\x11", 4) == 0) {
info("header adaptec (big endian) found at %llu\n", (unsigned long long)(off + ddf_off));
goto found;
}
return -1;
found:
volume_id_set_uuid(id, ddf->guid, DDF_GUID_LENGTH, UUID_STRING);
snprintf(id->type_version, DDF_REV_LENGTH, "%s", ddf->ddf_rev);
volume_id_set_usage(id, VOLUME_ID_RAID);