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volume_id: enable minix detection

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function                                             old     new   delta
volume_id_probe_minix                                  -      87     +87
fs2                                                   64      68      +4
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/0 up/down: 91/0)               Total: 91 bytes

Patch by wdlkmpx <wdlkmpx@gmail.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-07-25 14:22:08 +02:00
parent 5c123ac208
commit 73c47f6c41
3 changed files with 36 additions and 28 deletions
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91
util-linux/volume_id/minix.c Normal file
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@@ -0,0 +1,91 @@
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//config:config FEATURE_VOLUMEID_MINIX
//config: bool "minix filesystem"
//config: default y
//config: depends on VOLUMEID
//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o
#include "volume_id_internal.h"
struct minix_super_block {
uint16_t s_ninodes;
uint16_t s_nzones;
uint16_t s_imap_blocks;
uint16_t s_zmap_blocks;
uint16_t s_firstdatazone;
uint16_t s_log_zone_size;
uint32_t s_max_size;
uint16_t s_magic;
uint16_t s_state;
uint32_t s_zones;
} PACKED;
/* V3 minix super-block data on disk */
struct minix3_super_block {
uint32_t s_ninodes;
uint16_t s_pad0;
uint16_t s_imap_blocks;
uint16_t s_zmap_blocks;
uint16_t s_firstdatazone;
uint16_t s_log_zone_size;
uint16_t s_pad1;
uint32_t s_max_size;
uint32_t s_zones;
uint16_t s_magic;
uint16_t s_pad2;
uint16_t s_blocksize;
uint8_t s_disk_version;
} PACKED;
#define MINIX_SUPERBLOCK_OFFSET 0x400
int FAST_FUNC volume_id_probe_minix(struct volume_id *id /*, uint64_t off*/)
{
#define off ((uint64_t)0)
struct minix_super_block *ms;
struct minix3_super_block *ms3;
dbg("probing at offset 0x%llx", (unsigned long long) off);
ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
if (ms == NULL)
return -1;
if (ms->s_magic == cpu_to_le16(0x137F)) /* minix V1 fs, 14 char names */
goto found;
if (ms->s_magic == cpu_to_le16(0x138F)) /* minix V1 fs, 30 char names */
goto found;
if (ms->s_magic == cpu_to_le16(0x2468)) /* minix V2 fs, 14 char names */
goto found;
if (ms->s_magic == cpu_to_le16(0x2478)) /* minix V2 fs, 30 char names */
goto found;
ms3 = (void*)ms;
if (ms3->s_magic == cpu_to_le16(0x4d5a)) /* minix V3 fs, 60 char names */
goto found;
return -1;
found:
// volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
IF_FEATURE_BLKID_TYPE(id->type = "minix";)
return 0;
}