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Viewing changes to libblkid/src/superblocks/jfs.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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