72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 1999 by Andries Brouwer
|
|
* Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
|
|
* Copyright (C) 2001 by Andreas Dilger
|
|
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
|
|
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
|
|
*
|
|
* This file may be redistributed under the terms of the
|
|
* GNU Lesser General Public License.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <stdint.h>
|
|
|
|
#include "superblocks.h"
|
|
|
|
struct jfs_super_block {
|
|
unsigned char js_magic[4];
|
|
uint32_t js_version;
|
|
uint64_t js_size;
|
|
uint32_t js_bsize; /* 4: aggregate block size in bytes */
|
|
uint16_t js_l2bsize; /* 2: log2 of s_bsize */
|
|
uint16_t js_l2bfactor; /* 2: log2(s_bsize/hardware block size) */
|
|
uint32_t js_pbsize; /* 4: hardware/LVM block size in bytes */
|
|
uint16_t js_l2pbsize; /* 2: log2 of s_pbsize */
|
|
uint16_t js_pad; /* 2: padding necessary for alignment */
|
|
uint32_t js_dummy2[26];
|
|
unsigned char js_uuid[16];
|
|
unsigned char js_label[16];
|
|
unsigned char js_loguuid[16];
|
|
};
|
|
|
|
static int probe_jfs(blkid_probe pr, const struct blkid_idmag *mag)
|
|
{
|
|
struct jfs_super_block *js;
|
|
|
|
js = blkid_probe_get_sb(pr, mag, struct jfs_super_block);
|
|
if (!js)
|
|
return -1;
|
|
if (le32_to_cpu(js->js_bsize) != (1U << le16_to_cpu(js->js_l2bsize)))
|
|
return 1;
|
|
if (le32_to_cpu(js->js_pbsize) != (1U << le16_to_cpu(js->js_l2pbsize)))
|
|
return 1;
|
|
if ((le16_to_cpu(js->js_l2bsize) - le16_to_cpu(js->js_l2pbsize)) !=
|
|
le16_to_cpu(js->js_l2bfactor))
|
|
return 1;
|
|
|
|
if (strlen((char *) js->js_label))
|
|
blkid_probe_set_label(pr, js->js_label, sizeof(js->js_label));
|
|
blkid_probe_set_uuid(pr, js->js_uuid);
|
|
return 0;
|
|
}
|
|
|
|
|
|
const struct blkid_idinfo jfs_idinfo =
|
|
{
|
|
.name = "jfs",
|
|
.usage = BLKID_USAGE_FILESYSTEM,
|
|
.probefunc = probe_jfs,
|
|
.minsz = 16 * 1024 * 1024,
|
|
.magics =
|
|
{
|
|
{ .magic = "JFS1", .len = 4, .kboff = 32 },
|
|
{ NULL }
|
|
}
|
|
};
|
|
|