/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* 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 <errno.h>
#include <ctype.h>
#include <stdint.h>
#include <stddef.h>
#include "superblocks.h"
struct silicon_metadata {
uint8_t unknown0[0x2E];
uint8_t ascii_version[0x36 - 0x2E];
int8_t diskname[0x56 - 0x36];
int8_t unknown1[0x60 - 0x56];
uint32_t magic;
int8_t unknown1a[0x6C - 0x64];
uint32_t array_sectors_low;
uint32_t array_sectors_high;
int8_t unknown2[0x78 - 0x74];
uint32_t thisdisk_sectors;
int8_t unknown3[0x100 - 0x7C];
int8_t unknown4[0x104 - 0x100];
uint16_t product_id;
uint16_t vendor_id;
uint16_t minor_ver;
uint16_t major_ver;
uint8_t seconds;
uint8_t minutes;
uint8_t hour;
uint8_t day;
uint8_t month;
uint8_t year;
uint16_t raid0_stride;
int8_t unknown6[0x116 - 0x114];
uint8_t disk_number;
uint8_t type; /* SILICON_TYPE_* */
int8_t drives_per_striped_set;
int8_t striped_set_number;
int8_t drives_per_mirrored_set;
int8_t mirrored_set_number;
uint32_t rebuild_ptr_low;
uint32_t rebuild_ptr_high;
uint32_t incarnation_no;
uint8_t member_status;
uint8_t mirrored_set_state; /* SILICON_MIRROR_* */
uint8_t reported_device_location;
uint8_t idechannel;
uint8_t auto_rebuild;
uint8_t unknown8;
uint8_t text_type[0x13E - 0x12E];
uint16_t checksum1;
int8_t assumed_zeros[0x1FE - 0x140];
uint16_t checksum2;
} __attribute__((packed));
#define SILICON_MAGIC 0x2F000000
static uint16_t silraid_checksum(struct silicon_metadata *sil)
{
int sum = 0;
unsigned short count = offsetof(struct silicon_metadata, checksum1) / 2;
unsigned char *ptr = (unsigned char *) sil;
while (count--) {
uint16_t val;
memcpy(&val, ptr, sizeof(uint16_t));
sum += le16_to_cpu(val);
ptr += sizeof(uint16_t);
}
return (-sum & 0xFFFF);
}
static int probe_silraid(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
uint64_t off;
struct silicon_metadata *sil;
if (pr->size < 0x10000)
return 1;
if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
return 1;
off = ((pr->size / 0x200) - 1) * 0x200;
sil = (struct silicon_metadata *)
blkid_probe_get_buffer(pr, off,
sizeof(struct silicon_metadata));
if (!sil)
return errno ? -errno : 1;
if (le32_to_cpu(sil->magic) != SILICON_MAGIC)
return 1;
if (sil->disk_number >= 8)
return 1;
if (!blkid_probe_verify_csum(pr, silraid_checksum(sil), le16_to_cpu(sil->checksum1)))
return 1;
if (blkid_probe_sprintf_version(pr, "%u.%u",
le16_to_cpu(sil->major_ver),
le16_to_cpu(sil->minor_ver)) != 0)
return 1;
if (blkid_probe_set_magic(pr,
off + offsetof(struct silicon_metadata, magic),
sizeof(sil->magic),
(unsigned char *) &sil->magic))
return 1;
return 0;
}
const struct blkid_idinfo silraid_idinfo = {
.name = "silicon_medley_raid_member",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_silraid,
.magics = BLKID_NONE_MAGIC
};
