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Viewing changes to libblkid/src/superblocks/jmicron_raid.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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libblkid/src/superblocks/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 "superblocks.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,
 
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                const struct blkid_idmag *mag __attribute__((__unused__)))
 
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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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        if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
 
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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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        if (blkid_probe_set_magic(pr, off, sizeof(jm->signature),
 
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                                (unsigned char *) jm->signature))
 
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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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