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volume_id: minix version 3 support

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This commit is contained in:
Kay Sievers 2007-04-28 23:45:49 +02:00
parent e18e6d7999
commit 6ed3edfb69
1 changed files with 45 additions and 12 deletions
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57
extras/volume_id/lib/minix.c
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@ -1,7 +1,7 @@
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2005-2007 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@ -26,6 +26,14 @@
#include "libvolume_id.h"
#include "util.h"
#define MINIX_SUPERBLOCK_OFFSET 0x400
#define MINIX_SUPER_MAGIC 0x137F
#define MINIX_SUPER_MAGIC2 0x138F
#define MINIX2_SUPER_MAGIC 0x2468
#define MINIX2_SUPER_MAGIC2 0x2478
#define MINIX3_SUPER_MAGIC 0x4d5a
struct minix_super_block
{
uint16_t s_ninodes;
@ -40,38 +48,63 @@ struct minix_super_block
uint32_t s_zones;
} PACKED;
#define MINIX_SUPERBLOCK_OFFSET 0x400
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;
int volume_id_probe_minix(struct volume_id *id, uint64_t off, uint64_t size)
{
uint8_t *buf;
struct minix_super_block *ms;
struct minix3_super_block *m3s;
info("probing at offset 0x%llx", (unsigned long long) off);
ms = (struct minix_super_block *) volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
if (ms == NULL)
buf = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
if (buf == NULL)
return -1;
if (le16_to_cpu(ms->s_magic) == 0x137f) {
ms = (struct minix_super_block *) buf;
if (ms->s_magic == MINIX_SUPER_MAGIC ||
ms->s_magic == bswap_16(MINIX_SUPER_MAGIC)) {
strcpy(id->type_version, "1");
goto found;
}
if (le16_to_cpu(ms->s_magic) == 0x1387) {
if (ms->s_magic == MINIX_SUPER_MAGIC2 ||
ms->s_magic == bswap_16(MINIX_SUPER_MAGIC2)) {
strcpy(id->type_version, "1");
goto found;
}
if (le16_to_cpu(ms->s_magic) == 0x2468) {
if (ms->s_magic == MINIX2_SUPER_MAGIC ||
ms->s_magic == bswap_16(MINIX2_SUPER_MAGIC)) {
strcpy(id->type_version, "2");
goto found;
}
if (ms->s_magic == MINIX2_SUPER_MAGIC2 ||
ms->s_magic == bswap_16(MINIX2_SUPER_MAGIC2)) {
strcpy(id->type_version, "2");
goto found;
}
if (le16_to_cpu(ms->s_magic) == 0x2478) {
strcpy(id->type_version, "2");
m3s = (struct minix3_super_block *) buf;
if (m3s->s_magic == MINIX3_SUPER_MAGIC ||
m3s->s_magic == bswap_16(MINIX3_SUPER_MAGIC)) {
strcpy(id->type_version, "3");
goto found;
}
goto exit;
found: