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ext2.h
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/********************************************************************************
* ext2.h - devoptab file routines for EXT2/3/4-based devices. *
* *
* Copyright (c) 2010 Dimok *
* *
* This program/include file 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/include file 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 *
********************************************************************************/
#ifndef __EXT2_H_
#define __EXT2_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifndef XENON
#include <gctypes.h>
#include <gccore.h>
#include <ogc/disc_io.h>
#else
#include <xetypes.h>
#include <diskio/disc_io.h>
#endif
/**
* EXT2 cache options
*
* It is recommended to use more pages instead of large page sizes for cache due to the sporadic write behaviour of ext file system.
* It will significantly increase the speed. A page size of 32 is mostly suffiecient. The larger the page count the faster the
* read/write between smaller files will be. Larger page sizes result in faster read/write of single big files.
*/
#define EXT2_CACHE_DEFAULT_PAGE_COUNT 64 /* The default number of pages in the cache */
#define EXT2_CACHE_DEFAULT_PAGE_SIZE 32 /* The default number of sectors per cache page */
/* EXT2 mount flags */
#define EXT2_FLAG_RW 0x00001 /* Open the filesystem for reading and writing. Without this flag, the filesystem is opened for reading only. */
#define EXT2_FLAG_FORCE 0x00400 /* Open the filesystem regardless of the feature sets listed in the superblock */
#define EXT2_FLAG_JOURNAL_DEV_OK 0x01000 /* Only open external journal devices if this flag is set (e.g. ext3/ext4) */
#define EXT2_FLAG_64BITS 0x20000 /* Use the new style 64-Bit bitmaps. For more information see gen_bitmap64.c */
#define EXT2_FLAG_PRINT_PROGRESS 0x40000 /* If this flag is set the progress of file operations will be printed to stdout */
#define EXT2_FLAG_SKIP_MMP 0x100000 /* Open without multi-mount protection check. */
#define EXT2_FLAG_DEFAULT (EXT2_FLAG_RW | EXT2_FLAG_64BITS | EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SKIP_MMP)
/**
* Find all EXT2/3/4 partitions on a block device.
*
* @param INTERFACE The block device to search
* @param PARTITIONS (out) A pointer to receive the array of partition start sectors
*
* @return The number of entries in PARTITIONS or -1 if an error occurred (see errno)
* @note The caller is responsible for freeing PARTITIONS when finished with it
*/
int ext2FindPartitions(const DISC_INTERFACE *interface, sec_t **partitions);
/**
* Mount a EXT2/3/4 partition from a specific sector on a block device.
*
* @param NAME The name to mount the device under (can then be accessed as "NAME:/")
* @param INTERFACE The block device to mount
* @param STARTSECTOR The sector the partition begins at
* @param CACHEPAGECOUNT The total number of pages in the device cache
* @param CACHEPAGESIZE The number of sectors per cache page
* @param FLAGS Additional mounting flags (see above)
*
* @return True if mount was successful, false if no partition was found or an error occurred (see errno)
*/
bool ext2Mount(const char *name, const DISC_INTERFACE *interface, sec_t startSector, u32 cachePageCount, u32 cachePageSize, u32 flags);
/**
* Unmount a EXT2/3/4 partition.
*
* @param NAME The name of mount used in ext2Mount()
*/
void ext2Unmount(const char *name);
/**
* Get the volume name of a mounted EXT2/3/4 partition.
*
* @param NAME The name of mount
*
* @return The volumes name if successful or NULL if an error occurred (see errno)
*/
const char *ext2GetVolumeName (const char *name);
/**
* Set the volume name of a mounted EXT2/3/4 partition.
*
* @param NAME The name of mount
* @param VOLUMENAME The new volume name
*
* @return True if mount was successful, false if an error occurred (see errno)
* @note The mount must be write-enabled else this will fail
*/
bool ext2SetVolumeName (const char *name, const char *volumeName);
#ifdef __cplusplus
}
#endif
#endif