131 lines
3.7 KiB
C
Executable File
131 lines
3.7 KiB
C
Executable File
/*
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asfs.c -- parted asfs filesystem support
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Copyright (C) 1998-2000, 2007, 2009-2014, 2019-2023 Free Software
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Foundation, 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/debug.h>
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#include <parted/endian.h>
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#include "amiga.h"
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#include "asfs.h"
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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 int
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_asfs_probe_root (PedGeometry *geom, uint32_t *block, int blocksize, PedSector root) {
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int i, sum;
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PedSector start, end;
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if (PED_BE32_TO_CPU (block[0]) != 0x53465300) return 0;
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for (i = 0, sum = 1; i < 128*blocksize; i++) sum += PED_BE32_TO_CPU (block[i]);
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if (sum != 0) return 0;
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if (PED_BE32_TO_CPU (block[2]) * blocksize + geom->start != root) {
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return 0;
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}
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start = ((((PedSector) PED_BE32_TO_CPU (block[8])) << 32)
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+ (PedSector) PED_BE32_TO_CPU (block[9])) / 512;
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end = (((((PedSector) PED_BE32_TO_CPU (block[10])) << 32)
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+ (PedSector) PED_BE32_TO_CPU (block[11])) / 512) - 1;
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if (start != geom->start || end != geom->end) return 0;
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return 1;
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}
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static PedGeometry*
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_asfs_probe (PedGeometry* geom)
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{
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uint32_t *block;
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struct PartitionBlock * part;
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int blocksize = 1;
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PedSector root;
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int found = 0;
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PED_ASSERT (geom != NULL);
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PED_ASSERT (geom->dev != NULL);
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if (geom->dev->sector_size != 512)
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return NULL;
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/* Finds the blocksize of the partition block */
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if (!(part = ped_malloc (PED_SECTOR_SIZE_DEFAULT*blocksize))) {
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ped_exception_throw(PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
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_("%s : Failed to allocate partition block\n"), __func__);
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goto error_part;
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}
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if (amiga_find_part(geom, part) != NULL) {
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blocksize = PED_BE32_TO_CPU (part->de_SizeBlock)
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* PED_BE32_TO_CPU (part->de_SectorPerBlock) / 128;
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}
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free (part);
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/* Test boot block */
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if (!(block = ped_malloc (PED_SECTOR_SIZE_DEFAULT*blocksize))) {
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ped_exception_throw(PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
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_("%s : Failed to allocate block\n"), __func__);
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goto error_block;
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}
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root = geom->start;
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if (!ped_device_read (geom->dev, block, root, blocksize)) {
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ped_exception_throw(PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
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_("%s : Couldn't read root block %llu\n"), __func__, root);
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goto error;
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}
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if (PED_BE32_TO_CPU (block[0]) != 0x53465300) {
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goto error;
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}
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/* Find and test the root blocks */
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if (_asfs_probe_root(geom, block, blocksize, root)) {
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found++;
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}
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root = geom->end - blocksize - (geom->length % blocksize) + 1;
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if (!ped_device_read (geom->dev, block, root, 1)) {
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ped_exception_throw(PED_EXCEPTION_ERROR, PED_EXCEPTION_CANCEL,
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_("%s : Couldn't read root block %llu\n"), __func__, root);
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goto error;
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}
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if (_asfs_probe_root(geom, block, blocksize, root)) {
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found++;
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}
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if (found != 0) {
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free (block);
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return ped_geometry_duplicate (geom);
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}
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error:
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free (block);
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error_block:
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error_part:
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return NULL;
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}
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static PedFileSystemOps _asfs_ops = {
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probe: _asfs_probe,
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};
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PedFileSystemType _asfs_type = {
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next: NULL,
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ops: &_asfs_ops,
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name: "asfs",
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};
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