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Sourcecode: parted version File versions

jfs.c

/*
    libparted - a library for manipulating disk partitions
    Copyright (C) 2001 Free Software Foundation, Inc.

    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 Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "config.h"

#include <parted/parted.h>
#include <parted/endian.h>

#define _JFS_UTILITY
#include "jfs_types.h"
#include "jfs_superblock.h"

#define JFS_SUPER_SECTOR 64

#if ENABLE_NLS
#  include <libintl.h>
#  define _(String) dgettext (PACKAGE, String)
#else
#  define _(String) (String)
#endif /* ENABLE_NLS */

#include <string.h>

static PedGeometry*
jfs_probe (PedGeometry* geom)
{
      union {
            struct superblock sb;
            char              bytes[512];
      } buf;

      if (geom->length < JFS_SUPER_SECTOR + 1)
            return NULL;
      if (!ped_geometry_read (geom, &buf, JFS_SUPER_SECTOR, 1))
            return NULL;

      if (strncmp (buf.sb.s_magic, JFS_MAGIC, 4) == 0) {
            PedSector block_size = PED_LE32_TO_CPU (buf.sb.s_pbsize) / 512;
            PedSector block_count = PED_LE64_TO_CPU (buf.sb.s_size);

            return ped_geometry_new (geom->dev, geom->start,
                               block_size * block_count);
      } else {
            return NULL;
      }
}

#ifndef DISCOVER_ONLY
static int
jfs_clobber (PedGeometry* geom)
{
      char  buf[512];

      memset (buf, 0, 512);
      return ped_geometry_write (geom, buf, JFS_SUPER_SECTOR, 1);
}
#endif /* !DISCOVER_ONLY */

static PedFileSystemOps jfs_ops = {
      probe:            jfs_probe,
#ifndef DISCOVER_ONLY
      clobber:    jfs_clobber,
#else
      clobber:    NULL,
#endif
      open:       NULL,
      create:           NULL,
      close:            NULL,
      check:            NULL,
      copy:       NULL,
      resize:           NULL,
      get_create_constraint:  NULL,
      get_resize_constraint:  NULL,
      get_copy_constraint:    NULL
};

static PedFileSystemType jfs_type = {
      next: NULL,
      ops:  &jfs_ops,
      name: "jfs"
};

void
ped_file_system_jfs_init ()
{
      ped_file_system_type_register (&jfs_type);
}

void
ped_file_system_jfs_done ()
{
      ped_file_system_type_unregister (&jfs_type);
}

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