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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "volume_id_internal.h"
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struct minix_super_block
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{
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uint16_t s_ninodes;
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uint16_t s_nzones;
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uint16_t s_imap_blocks;
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uint16_t s_zmap_blocks;
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uint16_t s_firstdatazone;
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uint16_t s_log_zone_size;
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uint32_t s_max_size;
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uint16_t s_magic;
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uint16_t s_state;
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uint32_t s_zones;
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} __attribute__((__packed__));
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#define MINIX_SUPERBLOCK_OFFSET 0x400
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int volume_id_probe_minix(struct volume_id *id, uint64_t off)
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{
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struct minix_super_block *ms;
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dbg("probing at offset 0x%llx", (unsigned long long) off);
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ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
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if (ms == NULL)
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return -1;
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if (le16_to_cpu(ms->s_magic) == 0x137f) {
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id->type_version[0] = '1';
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goto found;
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}
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if (le16_to_cpu(ms->s_magic) == 0x1387) {
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id->type_version[0] = '1';
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goto found;
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}
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if (le16_to_cpu(ms->s_magic) == 0x2468) {
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id->type_version[0] = '2';
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goto found;
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}
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if (le16_to_cpu(ms->s_magic) == 0x2478) {
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id->type_version[0] = '2';
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goto found;
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}
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return -1;
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found:
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id->type_version[1] = '\0';
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "minix";
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return 0;
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}
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