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/*
* Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl>
*
* 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"
#include "crc32.h"
struct ubi_ec_hdr {
uint32_t magic;
uint8_t version;
uint8_t padding1[3];
uint64_t ec;
uint32_t vid_hdr_offset;
uint32_t data_offset;
uint32_t image_seq;
uint8_t padding2[32];
uint32_t hdr_crc;
} __attribute__((packed));
static int ubi_verify_csum(blkid_probe pr, const struct ubi_ec_hdr *hdr)
{
return blkid_probe_verify_csum(pr,
ul_crc32(~0LL, (unsigned char *) hdr,
sizeof(*hdr) - sizeof(hdr->hdr_crc)),
be32_to_cpu(hdr->hdr_crc));
}
static int probe_ubi(blkid_probe pr, const struct blkid_idmag *mag)
{
const struct ubi_ec_hdr *hdr;
hdr = blkid_probe_get_sb(pr, mag, struct ubi_ec_hdr);
if (!hdr)
return -1;
if (!ubi_verify_csum(pr, hdr))
return -1;
blkid_probe_sprintf_version(pr, "%u", hdr->version);
blkid_probe_sprintf_uuid(pr, (unsigned char *)&hdr->image_seq, 4, "%u",
be32_to_cpu(hdr->image_seq));
return 0;
}
const struct blkid_idinfo ubi_idinfo =
{
.name = "ubi",
.usage = BLKID_USAGE_RAID,
.probefunc = probe_ubi,
.magics =
{
{ .magic = "UBI#", .len = 4 },
{ NULL }
}
};
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