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/*
libparted - a library for manipulating disk partitions
Copyright (C) 2001, 2007, 2009-2014, 2019-2023 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#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_OFFSET 32768
#if ENABLE_NLS
# include <libintl.h>
# define _(String) dgettext (PACKAGE, String)
#else
# define _(String) (String)
#endif /* ENABLE_NLS */
static PedGeometry*
jfs_probe (PedGeometry* geom)
{
struct superblock *sb = alloca (geom->dev->sector_size);
if (geom->length * geom->dev->sector_size < JFS_SUPER_OFFSET)
return NULL;
if (!ped_geometry_read (geom, sb, JFS_SUPER_OFFSET / geom->dev->sector_size, 1))
return NULL;
if (strncmp (sb->s_magic, JFS_MAGIC, 4) == 0) {
PedSector block_size = PED_LE32_TO_CPU (sb->s_pbsize);
PedSector block_count = PED_LE64_TO_CPU (sb->s_size);
/* apparently jfs is retarded and always claims 512 byte
sectors, with the block count as a multiple of that */
return ped_geometry_new (geom->dev, geom->start,
block_size * block_count / geom->dev->sector_size);
} else {
return NULL;
}
}
static PedFileSystemOps jfs_ops = {
probe: jfs_probe,
};
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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