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Diffstat (limited to 'dosfstools/src/fsck.fat.h')
| -rw-r--r-- | dosfstools/src/fsck.fat.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/dosfstools/src/fsck.fat.h b/dosfstools/src/fsck.fat.h new file mode 100644 index 000000000..e5f617871 --- /dev/null +++ b/dosfstools/src/fsck.fat.h @@ -0,0 +1,191 @@ +/* fsck.fat.h - Common data structures and global variables + + Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch> + Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> + Copyright (C) 2008-2014 Daniel Baumann <mail@daniel-baumann.ch> + + 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/>. + + The complete text of the GNU General Public License + can be found in /usr/share/common-licenses/GPL-3 file. +*/ + +/* FAT32, VFAT, Atari format support, and various fixes additions May 1998 + * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */ + +#ifndef _DOSFSCK_H +#define _DOSFSCK_H + +#include <fcntl.h> +#include <stddef.h> +#include <stdint.h> +#include <endian.h> + +#include "msdos_fs.h" + +#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) + +#define FAT_STATE_DIRTY 0x01 + +/* ++roman: Use own definition of boot sector structure -- the kernel headers' + * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */ +struct boot_sector { + uint8_t ignored[3]; /* Boot strap short or near jump */ + uint8_t system_id[8]; /* Name - can be used to special case + partition manager volumes */ + uint8_t sector_size[2]; /* bytes per logical sector */ + uint8_t cluster_size; /* sectors/cluster */ + uint16_t reserved; /* reserved sectors */ + uint8_t fats; /* number of FATs */ + uint8_t dir_entries[2]; /* root directory entries */ + uint8_t sectors[2]; /* number of sectors */ + uint8_t media; /* media code (unused) */ + uint16_t fat_length; /* sectors/FAT */ + uint16_t secs_track; /* sectors per track */ + uint16_t heads; /* number of heads */ + uint32_t hidden; /* hidden sectors (unused) */ + uint32_t total_sect; /* number of sectors (if sectors == 0) */ + + /* The following fields are only used by FAT32 */ + uint32_t fat32_length; /* sectors/FAT */ + uint16_t flags; /* bit 8: fat mirroring, low 4: active fat */ + uint8_t version[2]; /* major, minor filesystem version */ + uint32_t root_cluster; /* first cluster in root directory */ + uint16_t info_sector; /* filesystem info sector */ + uint16_t backup_boot; /* backup boot sector */ + uint8_t reserved2[12]; /* Unused */ + + uint8_t drive_number; /* Logical Drive Number */ + uint8_t reserved3; /* Unused */ + + uint8_t extended_sig; /* Extended Signature (0x29) */ + uint32_t serial; /* Serial number */ + uint8_t label[11]; /* FS label */ + uint8_t fs_type[8]; /* FS Type */ + + /* fill up to 512 bytes */ + uint8_t junk[422]; +} __attribute__ ((packed)); + +struct boot_sector_16 { + uint8_t ignored[3]; /* Boot strap short or near jump */ + uint8_t system_id[8]; /* Name - can be used to special case + partition manager volumes */ + uint8_t sector_size[2]; /* bytes per logical sector */ + uint8_t cluster_size; /* sectors/cluster */ + uint16_t reserved; /* reserved sectors */ + uint8_t fats; /* number of FATs */ + uint8_t dir_entries[2]; /* root directory entries */ + uint8_t sectors[2]; /* number of sectors */ + uint8_t media; /* media code (unused) */ + uint16_t fat_length; /* sectors/FAT */ + uint16_t secs_track; /* sectors per track */ + uint16_t heads; /* number of heads */ + uint32_t hidden; /* hidden sectors (unused) */ + uint32_t total_sect; /* number of sectors (if sectors == 0) */ + + uint8_t drive_number; /* Logical Drive Number */ + uint8_t reserved2; /* Unused */ + + uint8_t extended_sig; /* Extended Signature (0x29) */ + uint32_t serial; /* Serial number */ + uint8_t label[11]; /* FS label */ + uint8_t fs_type[8]; /* FS Type */ + + /* fill up to 512 bytes */ + uint8_t junk[450]; +} __attribute__ ((packed)); + +struct info_sector { + uint32_t magic; /* Magic for info sector ('RRaA') */ + uint8_t junk[0x1dc]; + uint32_t reserved1; /* Nothing as far as I can tell */ + uint32_t signature; /* 0x61417272 ('rrAa') */ + uint32_t free_clusters; /* Free cluster count. -1 if unknown */ + uint32_t next_cluster; /* Most recently allocated cluster. */ + uint32_t reserved2[3]; + uint16_t reserved3; + uint16_t boot_sign; +}; + +typedef struct { + uint8_t name[8], ext[3]; /* name and extension */ + uint8_t attr; /* attribute bits */ + uint8_t lcase; /* Case for base and extension */ + uint8_t ctime_ms; /* Creation time, milliseconds */ + uint16_t ctime; /* Creation time */ + uint16_t cdate; /* Creation date */ + uint16_t adate; /* Last access date */ + uint16_t starthi; /* High 16 bits of cluster in FAT32 */ + uint16_t time, date, start; /* time, date and first cluster */ + uint32_t size; /* file size (in bytes) */ +} __attribute__ ((packed)) DIR_ENT; + +typedef struct _dos_file { + DIR_ENT dir_ent; + char *lfn; + loff_t offset; + loff_t lfn_offset; + struct _dos_file *parent; /* parent directory */ + struct _dos_file *next; /* next entry */ + struct _dos_file *first; /* first entry (directory only) */ +} DOS_FILE; + +typedef struct { + uint32_t value; + uint32_t reserved; +} FAT_ENTRY; + +typedef struct { + int nfats; + loff_t fat_start; + unsigned int fat_size; /* unit is bytes */ + unsigned int fat_bits; /* size of a FAT entry */ + unsigned int eff_fat_bits; /* # of used bits in a FAT entry */ + uint32_t root_cluster; /* 0 for old-style root dir */ + loff_t root_start; + unsigned int root_entries; + loff_t data_start; + unsigned int cluster_size; + uint32_t clusters; + loff_t fsinfo_start; /* 0 if not present */ + long free_clusters; + loff_t backupboot_start; /* 0 if not present */ + unsigned char *fat; + DOS_FILE **cluster_owner; + char *label; +} DOS_FS; + +extern int interactive, rw, list, verbose, test, write_immed; +extern int atari_format; +extern unsigned n_files; +extern void *mem_queue; + +/* value to use as end-of-file marker */ +#define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs)) +#define FAT_IS_EOF(fs,v) ((uint32_t)(v) >= (0xff8|FAT_EXTD(fs))) +/* value to mark bad clusters */ +#define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs)) +/* range of values used for bad clusters */ +#define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs)) +#define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs)) +#define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs)) + +/* return -16 as a number with fs->fat_bits bits */ +#define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf) + +/* marker for files with no 8.3 name */ +#define FAT_NO_83NAME 32 + +#endif |