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/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
*
* Inspired by libvolume_id by
* Kay Sievers <kay.sievers@vrfy.org>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include "superblocks.h"
/* http://www.snia.org/standards/home */
#define DDF_GUID_LENGTH 24
#define DDF_REV_LENGTH 8
#define DDF_MAGIC 0xDE11DE11
struct ddf_header {
uint32_t signature;
uint32_t crc;
uint8_t guid[DDF_GUID_LENGTH];
char ddf_rev[8]; /* 01.02.00 */
uint32_t seq; /* starts at '1' */
uint32_t timestamp;
uint8_t openflag;
uint8_t foreignflag;
uint8_t enforcegroups;
uint8_t pad0; /* 0xff */
uint8_t pad1[12]; /* 12 * 0xff */
/* 64 bytes so far */
uint8_t header_ext[32]; /* reserved: fill with 0xff */
uint64_t primary_lba;
uint64_t secondary_lba;
uint8_t type;
uint8_t pad2[3]; /* 0xff */
uint32_t workspace_len; /* sectors for vendor space -
* at least 32768(sectors) */
uint64_t workspace_lba;
uint16_t max_pd_entries; /* one of 15, 63, 255, 1023, 4095 */
uint16_t max_vd_entries; /* 2^(4,6,8,10,12)-1 : i.e. as above */
uint16_t max_partitions; /* i.e. max num of configuration
record entries per disk */
uint16_t config_record_len; /* 1 +ROUNDUP(max_primary_element_entries
*12/512) */
uint16_t max_primary_element_entries; /* 16, 64, 256, 1024, or 4096 */
uint8_t pad3[54]; /* 0xff */
/* 192 bytes so far */
uint32_t controller_section_offset;
uint32_t controller_section_length;
uint32_t phys_section_offset;
uint32_t phys_section_length;
uint32_t virt_section_offset;
uint32_t virt_section_length;
uint32_t config_section_offset;
uint32_t config_section_length;
uint32_t data_section_offset;
uint32_t data_section_length;
uint32_t bbm_section_offset;
uint32_t bbm_section_length;
uint32_t diag_space_offset;
uint32_t diag_space_length;
uint32_t vendor_offset;
uint32_t vendor_length;
/* 256 bytes so far */
uint8_t pad4[256]; /* 0xff */
} __attribute__((packed));
static int probe_ddf(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
int hdrs[] = { 1, 257 };
size_t i;
struct ddf_header *ddf = NULL;
char version[DDF_REV_LENGTH + 1];
uint64_t off = 0, lba;
for (i = 0; i < ARRAY_SIZE(hdrs); i++) {
off = ((pr->size / 0x200) - hdrs[i]) * 0x200;
ddf = (struct ddf_header *) blkid_probe_get_buffer(pr,
off,
sizeof(struct ddf_header));
if (!ddf)
return errno ? -errno : 1;
if (ddf->signature == cpu_to_be32(DDF_MAGIC) ||
ddf->signature == cpu_to_le32(DDF_MAGIC))
break;
ddf = NULL;
}
if (!ddf)
return 1;
lba = ddf->signature == cpu_to_be32(DDF_MAGIC) ?
be64_to_cpu(ddf->primary_lba) :
le64_to_cpu(ddf->primary_lba);
if (lba > 0) {
/* check primary header */
const unsigned char *buf;
buf = blkid_probe_get_buffer(pr,
lba << 9, sizeof(ddf->signature));
if (!buf)
return errno ? -errno : 1;
if (memcmp(buf, &ddf->signature, 4) != 0)
return 1;
}
blkid_probe_strncpy_uuid(pr, ddf->guid, sizeof(ddf->guid));
memcpy(version, ddf->ddf_rev, sizeof(ddf->ddf_rev));
*(version + sizeof(ddf->ddf_rev)) = '\0';
if (blkid_probe_set_version(pr, version) != 0)
return 1;
if (blkid_probe_set_magic(pr, off,
sizeof(ddf->signature),
(unsigned char *) &ddf->signature))
return 1;
return 0;
}
const struct blkid_idinfo ddfraid_idinfo = {
.name = "ddf_raid_member",
.usage = BLKID_USAGE_RAID,
.minsz = 0x30000,
.probefunc = probe_ddf,
.magics = BLKID_NONE_MAGIC
};
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