1 /* dosfsck.h - Common data structures and global variables
3 Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
4 Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
6 This program is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 On Debian systems, the complete text of the GNU General Public License
20 can be found in /usr/share/common-licenses/GPL-3 file.
23 /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
24 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
30 #include <sys/types.h>
31 #define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
32 #define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/
33 #define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
35 # include <asm/types.h>
36 # include <asm/byteorder.h>
38 #include <linux/msdos_fs.h>
45 #if __BYTE_ORDER == __BIG_ENDIAN
47 #define CF_LE_W(v) bswap_16(v)
48 #define CF_LE_L(v) bswap_32(v)
49 #define CT_LE_W(v) CF_LE_W(v)
50 #define CT_LE_L(v) CF_LE_L(v)
52 #define CF_LE_W(v) (v)
53 #define CF_LE_L(v) (v)
54 #define CT_LE_W(v) (v)
55 #define CT_LE_L(v) (v)
56 #endif /* __BIG_ENDIAN */
58 #define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
60 /* ++roman: Use own definition of boot sector structure -- the kernel headers'
61 * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
63 __u8 ignored[3]; /* Boot strap short or near jump */
64 __u8 system_id[8]; /* Name - can be used to special case
65 partition manager volumes */
66 __u8 sector_size[2]; /* bytes per logical sector */
67 __u8 cluster_size; /* sectors/cluster */
68 __u16 reserved; /* reserved sectors */
69 __u8 fats; /* number of FATs */
70 __u8 dir_entries[2]; /* root directory entries */
71 __u8 sectors[2]; /* number of sectors */
72 __u8 media; /* media code (unused) */
73 __u16 fat_length; /* sectors/FAT */
74 __u16 secs_track; /* sectors per track */
75 __u16 heads; /* number of heads */
76 __u32 hidden; /* hidden sectors (unused) */
77 __u32 total_sect; /* number of sectors (if sectors == 0) */
79 /* The following fields are only used by FAT32 */
80 __u32 fat32_length; /* sectors/FAT */
81 __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
82 __u8 version[2]; /* major, minor filesystem version */
83 __u32 root_cluster; /* first cluster in root directory */
84 __u16 info_sector; /* filesystem info sector */
85 __u16 backup_boot; /* backup boot sector */
86 __u8 reserved2[12]; /* Unused */
88 __u8 drive_number; /* Logical Drive Number */
89 __u8 reserved3; /* Unused */
91 __u8 extended_sig; /* Extended Signature (0x29) */
92 __u32 serial; /* Serial number */
93 __u8 label[11]; /* FS label */
94 __u8 fs_type[8]; /* FS Type */
96 /* fill up to 512 bytes */
98 } __attribute__ ((packed));
100 struct boot_sector_16 {
101 __u8 ignored[3]; /* Boot strap short or near jump */
102 __u8 system_id[8]; /* Name - can be used to special case
103 partition manager volumes */
104 __u8 sector_size[2]; /* bytes per logical sector */
105 __u8 cluster_size; /* sectors/cluster */
106 __u16 reserved; /* reserved sectors */
107 __u8 fats; /* number of FATs */
108 __u8 dir_entries[2]; /* root directory entries */
109 __u8 sectors[2]; /* number of sectors */
110 __u8 media; /* media code (unused) */
111 __u16 fat_length; /* sectors/FAT */
112 __u16 secs_track; /* sectors per track */
113 __u16 heads; /* number of heads */
114 __u32 hidden; /* hidden sectors (unused) */
115 __u32 total_sect; /* number of sectors (if sectors == 0) */
117 __u8 drive_number; /* Logical Drive Number */
118 __u8 reserved2; /* Unused */
120 __u8 extended_sig; /* Extended Signature (0x29) */
121 __u32 serial; /* Serial number */
122 __u8 label[11]; /* FS label */
123 __u8 fs_type[8]; /* FS Type */
125 /* fill up to 512 bytes */
127 } __attribute__ ((packed));
130 __u32 magic; /* Magic for info sector ('RRaA') */
132 __u32 reserved1; /* Nothing as far as I can tell */
133 __u32 signature; /* 0x61417272 ('rrAa') */
134 __u32 free_clusters; /* Free cluster count. -1 if unknown */
135 __u32 next_cluster; /* Most recently allocated cluster. */
142 __u8 name[8],ext[3]; /* name and extension */
143 __u8 attr; /* attribute bits */
144 __u8 lcase; /* Case for base and extension */
145 __u8 ctime_ms; /* Creation time, milliseconds */
146 __u16 ctime; /* Creation time */
147 __u16 cdate; /* Creation date */
148 __u16 adate; /* Last access date */
149 __u16 starthi; /* High 16 bits of cluster in FAT32 */
150 __u16 time,date,start;/* time, date and first cluster */
151 __u32 size; /* file size (in bytes) */
152 } __attribute__ ((packed)) DIR_ENT;
154 typedef struct _dos_file {
159 struct _dos_file *parent; /* parent directory */
160 struct _dos_file *next; /* next entry */
161 struct _dos_file *first; /* first entry (directory only) */
166 unsigned long reserved;
172 unsigned int fat_size; /* unit is bytes */
173 unsigned int fat_bits; /* size of a FAT entry */
174 unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
175 unsigned long root_cluster; /* 0 for old-style root dir */
177 unsigned int root_entries;
179 unsigned int cluster_size;
180 unsigned long clusters;
181 loff_t fsinfo_start; /* 0 if not present */
183 loff_t backupboot_start; /* 0 if not present */
185 DOS_FILE **cluster_owner;
190 #define offsetof(t,e) ((int)&(((t *)0)->e))
193 extern int interactive,rw,list,verbose,test,write_immed;
194 extern int atari_format;
195 extern unsigned n_files;
196 extern void *mem_queue;
198 /* value to use as end-of-file marker */
199 #define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
200 #define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
201 /* value to mark bad clusters */
202 #define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs))
203 /* range of values used for bad clusters */
204 #define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
205 #define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
206 #define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
208 /* return -16 as a number with fs->fat_bits bits */
209 #define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf)
211 /* marker for files with no 8.3 name */
212 #define FAT_NO_83NAME 32