92 lines
2.6 KiB
C
92 lines
2.6 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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//config:config FEATURE_VOLUMEID_MINIX
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//config: bool "minix filesystem"
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//config: default y
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//config: depends on VOLUMEID
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//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o
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#include "volume_id_internal.h"
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struct minix_super_block {
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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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} PACKED;
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/* V3 minix super-block data on disk */
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struct minix3_super_block {
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uint32_t s_ninodes;
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uint16_t s_pad0;
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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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uint16_t s_pad1;
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uint32_t s_max_size;
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uint32_t s_zones;
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uint16_t s_magic;
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uint16_t s_pad2;
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uint16_t s_blocksize;
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uint8_t s_disk_version;
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} PACKED;
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#define MINIX_SUPERBLOCK_OFFSET 0x400
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int FAST_FUNC volume_id_probe_minix(struct volume_id *id /*, uint64_t off*/)
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{
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#define off ((uint64_t)0)
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struct minix_super_block *ms;
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struct minix3_super_block *ms3;
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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 (ms->s_magic == cpu_to_le16(0x137F)) /* minix V1 fs, 14 char names */
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goto found;
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if (ms->s_magic == cpu_to_le16(0x138F)) /* minix V1 fs, 30 char names */
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goto found;
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if (ms->s_magic == cpu_to_le16(0x2468)) /* minix V2 fs, 14 char names */
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goto found;
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if (ms->s_magic == cpu_to_le16(0x2478)) /* minix V2 fs, 30 char names */
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goto found;
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ms3 = (void*)ms;
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if (ms3->s_magic == cpu_to_le16(0x4d5a)) /* minix V3 fs, 60 char names */
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goto found;
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return -1;
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found:
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// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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IF_FEATURE_BLKID_TYPE(id->type = "minix";)
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return 0;
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}
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