179 lines
7.5 KiB
C
179 lines
7.5 KiB
C
/**
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* ntfsinternal.h - Internal support routines for NTFS-based devices.
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*
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* Copyright (c) 2009 Rhys "Shareese" Koedijk
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* Copyright (c) 2006 Michael "Chishm" Chisholm
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _NTFSINTERNAL_H
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#define _NTFSINTERNAL_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "types.h"
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#include "compat.h"
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#include "logging.h"
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#include "layout.h"
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#include "device.h"
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#include "volume.h"
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#include "dir.h"
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#include "inode.h"
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#include "attrib.h"
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#include "reparse.h"
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#include "security.h"
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#include "efs.h"
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#include "unistr.h"
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#include <gccore.h>
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#include <ogc/disc_io.h>
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#include <sys/iosupport.h>
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#define NTFS_MOUNT_PREFIX "ntfs" /* Device name prefix to use when auto-mounting */
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#define NTFS_MAX_PARTITIONS 32 /* Maximum number of partitions that can be found */
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#define NTFS_MAX_MOUNTS 10 /* Maximum number of mounts available at one time */
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#define NTFS_MAX_SYMLINK_DEPTH 10 /* Maximum search depth when resolving symbolic links */
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#define NTFS_OEM_ID cpu_to_le64(0x202020205346544eULL) /* "NTFS " */
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#define MBR_SIGNATURE cpu_to_le16(0xAA55)
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#define EBR_SIGNATURE cpu_to_le16(0xAA55)
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#define PARTITION_STATUS_NONBOOTABLE 0x00 /* Non-bootable */
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#define PARTITION_STATUS_BOOTABLE 0x80 /* Bootable (active) */
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#define PARTITION_TYPE_EMPTY 0x00 /* Empty */
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#define PARTITION_TYPE_DOS33_EXTENDED 0x05 /* DOS 3.3+ extended partition */
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#define PARTITION_TYPE_NTFS 0x07 /* Windows NT NTFS */
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#define PARTITION_TYPE_WIN95_EXTENDED 0x0F /* Windows 95 extended partition */
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/* Forward declarations */
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struct _ntfs_file_state;
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struct _ntfs_dir_state;
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/**
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* PRIMARY_PARTITION - Block device partition record
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*/
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typedef struct _PARTITION_RECORD {
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u8 status; /* Partition status; see above */
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u8 chs_start[3]; /* Cylinder-head-sector address to first block of partition */
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u8 type; /* Partition type; see above */
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u8 chs_end[3]; /* Cylinder-head-sector address to last block of partition */
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u32 lba_start; /* Local block address to first sector of partition */
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u32 block_count; /* Number of blocks in partition */
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} __attribute__((__packed__)) PARTITION_RECORD;
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/**
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* MASTER_BOOT_RECORD - Block device master boot record
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*/
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typedef struct _MASTER_BOOT_RECORD {
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u8 code_area[446]; /* Code area; normally empty */
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PARTITION_RECORD partitions[4]; /* 4 primary partitions */
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u16 signature; /* MBR signature; 0xAA55 */
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} __attribute__((__packed__)) MASTER_BOOT_RECORD;
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/**
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* EXTENDED_PARTITION - Block device extended boot record
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*/
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typedef struct _EXTENDED_BOOT_RECORD {
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u8 code_area[446]; /* Code area; normally empty */
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PARTITION_RECORD partition; /* Primary partition */
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PARTITION_RECORD next_ebr; /* Next extended boot record in the chain */
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u8 reserved[32]; /* Normally empty */
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u16 signature; /* EBR signature; 0xAA55 */
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} __attribute__((__packed__)) EXTENDED_BOOT_RECORD;
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/**
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* INTERFACE_ID - Disc interface identifier
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*/
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typedef struct _INTERFACE_ID {
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const char *name; /* Interface name */
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const DISC_INTERFACE *interface; /* Disc interface */
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} INTERFACE_ID;
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/**
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* ntfs_atime_t - File access time update strategies
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*/
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typedef enum {
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ATIME_ENABLED, /* Update access times */
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ATIME_DISABLED /* Don't update access times */
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} ntfs_atime_t;
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/**
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* ntfs_vd - NTFS volume descriptor
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*/
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typedef struct _ntfs_vd {
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struct ntfs_device *dev; /* NTFS device handle */
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ntfs_volume *vol; /* NTFS volume handle */
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mutex_t lock; /* Volume lock mutex */
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s64 id; /* Filesystem id */
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u32 flags; /* Mount flags */
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char name[128]; /* Volume name (cached) */
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u16 uid; /* User id for entry creation */
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u16 gid; /* Group id for entry creation */
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u16 fmask; /* Unix style permission mask for file creation */
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u16 dmask; /* Unix style permission mask for directory creation */
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ntfs_atime_t atime; /* Entry access time update strategy */
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bool showHiddenFiles; /* If true, show hidden files when enumerating directories */
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bool showSystemFiles; /* If true, show system files when enumerating directories */
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ntfs_inode *cwd_ni; /* Current directory */
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struct _ntfs_dir_state *firstOpenDir; /* The start of a FILO linked list of currently opened directories */
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struct _ntfs_file_state *firstOpenFile; /* The start of a FILO linked list of currently opened files */
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u16 openDirCount; /* The total number of directories currently open in this volume */
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u16 openFileCount; /* The total number of files currently open in this volume */
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} ntfs_vd;
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/* Lock volume */
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static inline void ntfsLock (ntfs_vd *vd)
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{
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LWP_MutexLock(vd->lock);
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}
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/* Unlock volume */
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static inline void ntfsUnlock (ntfs_vd *vd)
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{
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LWP_MutexUnlock(vd->lock);
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}
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/* Gekko device related routines */
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int ntfsAddDevice (const char *name, void *deviceData);
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void ntfsRemoveDevice (const char *path);
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const devoptab_t *ntfsGetDevice (const char *path, bool useDefaultDevice);
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const devoptab_t *ntfsGetDevOpTab (void);
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const INTERFACE_ID* ntfsGetDiscInterfaces (void);
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/* Miscellaneous helper/support routines */
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int ntfsInitVolume (ntfs_vd *vd);
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void ntfsDeinitVolume (ntfs_vd *vd);
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ntfs_vd *ntfsGetVolume (const char *path);
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ntfs_inode *ntfsOpenEntry (ntfs_vd *vd, const char *path);
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ntfs_inode *ntfsParseEntry (ntfs_vd *vd, const char *path, int reparseLevel);
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void ntfsCloseEntry (ntfs_vd *vd, ntfs_inode *ni);
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ntfs_inode *ntfsCreate (ntfs_vd *vd, const char *path, mode_t type, const char *target);
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int ntfsLink (ntfs_vd *vd, const char *old_path, const char *new_path);
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int ntfsUnlink (ntfs_vd *vd, const char *path);
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int ntfsSync (ntfs_vd *vd, ntfs_inode *ni);
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int ntfsStat (ntfs_vd *vd, ntfs_inode *ni, struct stat *st);
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void ntfsUpdateTimes (ntfs_vd *vd, ntfs_inode *ni, ntfs_time_update_flags mask);
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const char *ntfsRealPath (const char *path);
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int ntfsUnicodeToLocal (const ntfschar *ins, const int ins_len, char **outs, int outs_len);
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int ntfsLocalToUnicode (const char *ins, ntfschar **outs);
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#endif /* _NTFSINTERNAL_H */
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