65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
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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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