81 lines
2.1 KiB
C
Executable File
81 lines
2.1 KiB
C
Executable File
/*
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libparted - a library for manipulating disk partitions
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Copyright (C) 2001, 2007, 2009-2014, 2019-2023 Free Software Foundation,
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Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <parted/parted.h>
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#include <parted/endian.h>
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#define _JFS_UTILITY
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#include "jfs_types.h"
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#include "jfs_superblock.h"
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#define JFS_SUPER_OFFSET 32768
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#if ENABLE_NLS
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# include <libintl.h>
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# define _(String) dgettext (PACKAGE, String)
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#else
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# define _(String) (String)
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#endif /* ENABLE_NLS */
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static PedGeometry*
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jfs_probe (PedGeometry* geom)
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{
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struct superblock *sb = alloca (geom->dev->sector_size);
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if (geom->length * geom->dev->sector_size < JFS_SUPER_OFFSET)
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return NULL;
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if (!ped_geometry_read (geom, sb, JFS_SUPER_OFFSET / geom->dev->sector_size, 1))
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return NULL;
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if (strncmp (sb->s_magic, JFS_MAGIC, 4) == 0) {
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PedSector block_size = PED_LE32_TO_CPU (sb->s_pbsize);
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PedSector block_count = PED_LE64_TO_CPU (sb->s_size);
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/* apparently jfs is retarded and always claims 512 byte
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sectors, with the block count as a multiple of that */
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return ped_geometry_new (geom->dev, geom->start,
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block_size * block_count / geom->dev->sector_size);
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} else {
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return NULL;
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}
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}
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static PedFileSystemOps jfs_ops = {
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probe: jfs_probe,
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};
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static PedFileSystemType jfs_type = {
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next: NULL,
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ops: &jfs_ops,
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name: "jfs",
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};
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void
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ped_file_system_jfs_init ()
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{
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ped_file_system_type_register (&jfs_type);
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}
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void
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ped_file_system_jfs_done ()
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{
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ped_file_system_type_unregister (&jfs_type);
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}
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