/* fsck.fat.h - Common data structures and global variables Copyright (C) 1993 Werner Almesberger Copyright (C) 1998 Roman Hodek Copyright (C) 2008-2014 Daniel Baumann 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 . 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 */ #ifndef _DOSFSCK_H #define _DOSFSCK_H #include #include #include #include #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