68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2006 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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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 <errno.h>
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#include <ctype.h>
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#include "libvolume_id.h"
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#include "libvolume_id-private.h"
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struct jmicron_meta {
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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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} PACKED;
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int volume_id_probe_jmicron_raid(struct volume_id *id, uint64_t off, uint64_t size)
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{
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const uint8_t *buf;
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uint64_t meta_off;
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struct jmicron_meta *jm;
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info("probing at offset 0x%llx, size 0x%llx\n",
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(unsigned long long) off, (unsigned long long) size);
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if (size < 0x10000)
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return -1;
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meta_off = ((size / 0x200)-1) * 0x200;
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buf = volume_id_get_buffer(id, off + meta_off, 0x200);
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if (buf == NULL)
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return -1;
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jm = (struct jmicron_meta *) buf;
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if (memcmp(jm->signature, "JM", 2) != 0)
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return -1;
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volume_id_set_usage(id, VOLUME_ID_RAID);
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snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u", jm->major_version, jm->minor_version);
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id->type = "jmicron_raid_member";
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return 0;
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}
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