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libs/blkid/src/probers/jmicron_raid.c

 

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/*

 

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 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>

 

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 *

 

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 * Inspired by libvolume_id by

 

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 *     Kay Sievers <kay.sievers@vrfy.org>

 

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 *

 

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 * This file may be redistributed under the terms of the

 

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 * GNU Lesser General Public License.

 

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 */

 

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#include <stdio.h>

 

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#include <stdlib.h>

 

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#include <unistd.h>

 

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#include <string.h>

 

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#include <stdint.h>

 

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#include "blkidP.h"

 

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struct jm_metadata {

 

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        int8_t          signature[2];

 

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        uint8_t         minor_version;

 

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        uint8_t         major_version;

 

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        uint16_t        checksum;

 

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};

 

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#define JM_SIGNATURE            "JM"

 

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static int probe_jmraid(blkid_probe pr, const struct blkid_idmag *mag)

 

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{

 

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        uint64_t off;

 

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        struct jm_metadata *jm;

 

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        if (pr->size < 0x10000)

 

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                return -1;

 

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        off = ((pr->size / 0x200) - 1) * 0x200;

 

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        jm = (struct jm_metadata *)

 

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                blkid_probe_get_buffer(pr,

 

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                                off,

 

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                                sizeof(struct jm_metadata));

 

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        if (!jm)

 

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                return -1;

 

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        if (memcmp(jm->signature, JM_SIGNATURE, sizeof(JM_SIGNATURE) - 1) != 0)

 

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                return -1;

 

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        if (blkid_probe_sprintf_version(pr, "%u.%u",

 

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                                jm->major_version, jm->minor_version) != 0)

 

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                return -1;

 

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        return 0;

 

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}

 

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const struct blkid_idinfo jmraid_idinfo = {

 

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        .name           = "jmicron_raid_member",

 

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        .usage          = BLKID_USAGE_RAID,

 

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        .probefunc      = probe_jmraid,

 

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        .magics         = BLKID_NONE_MAGIC

 

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};

 

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