dosfsck.h 7.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216
  1. /* dosfsck.h - Common data structures and global variables
  2. Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
  3. Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
  4. Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
  5. This program is free software: you can redistribute it and/or modify
  6. it under the terms of the GNU General Public License as published by
  7. the Free Software Foundation, either version 3 of the License, or
  8. (at your option) any later version.
  9. This program is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. GNU General Public License for more details.
  13. You should have received a copy of the GNU General Public License
  14. along with this program. If not, see <http://www.gnu.org/licenses/>.
  15. On Debian systems, the complete text of the GNU General Public License
  16. can be found in /usr/share/common-licenses/GPL-3 file.
  17. */
  18. /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
  19. * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
  20. #ifndef _DOSFSCK_H
  21. #define _DOSFSCK_H
  22. #include <sys/types.h>
  23. #define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
  24. #define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h> */
  25. #define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
  26. #include <asm/types.h>
  27. #include <asm/byteorder.h>
  28. #include <linux/msdos_fs.h>
  29. #undef CF_LE_W
  30. #undef CF_LE_L
  31. #undef CT_LE_W
  32. #undef CT_LE_L
  33. #if __BYTE_ORDER == __BIG_ENDIAN
  34. #include <byteswap.h>
  35. #define CF_LE_W(v) bswap_16(v)
  36. #define CF_LE_L(v) bswap_32(v)
  37. #define CT_LE_W(v) CF_LE_W(v)
  38. #define CT_LE_L(v) CF_LE_L(v)
  39. #else
  40. #define CF_LE_W(v) (v)
  41. #define CF_LE_L(v) (v)
  42. #define CT_LE_W(v) (v)
  43. #define CT_LE_L(v) (v)
  44. #endif /* __BIG_ENDIAN */
  45. #define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
  46. #define FAT_STATE_DIRTY 0x01
  47. /* ++roman: Use own definition of boot sector structure -- the kernel headers'
  48. * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
  49. struct boot_sector {
  50. __u8 ignored[3]; /* Boot strap short or near jump */
  51. __u8 system_id[8]; /* Name - can be used to special case
  52. partition manager volumes */
  53. __u8 sector_size[2]; /* bytes per logical sector */
  54. __u8 cluster_size; /* sectors/cluster */
  55. __u16 reserved; /* reserved sectors */
  56. __u8 fats; /* number of FATs */
  57. __u8 dir_entries[2]; /* root directory entries */
  58. __u8 sectors[2]; /* number of sectors */
  59. __u8 media; /* media code (unused) */
  60. __u16 fat_length; /* sectors/FAT */
  61. __u16 secs_track; /* sectors per track */
  62. __u16 heads; /* number of heads */
  63. __u32 hidden; /* hidden sectors (unused) */
  64. __u32 total_sect; /* number of sectors (if sectors == 0) */
  65. /* The following fields are only used by FAT32 */
  66. __u32 fat32_length; /* sectors/FAT */
  67. __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
  68. __u8 version[2]; /* major, minor filesystem version */
  69. __u32 root_cluster; /* first cluster in root directory */
  70. __u16 info_sector; /* filesystem info sector */
  71. __u16 backup_boot; /* backup boot sector */
  72. __u8 reserved2[12]; /* Unused */
  73. __u8 drive_number; /* Logical Drive Number */
  74. __u8 reserved3; /* Unused */
  75. __u8 extended_sig; /* Extended Signature (0x29) */
  76. __u32 serial; /* Serial number */
  77. __u8 label[11]; /* FS label */
  78. __u8 fs_type[8]; /* FS Type */
  79. /* fill up to 512 bytes */
  80. __u8 junk[422];
  81. } __attribute__ ((packed));
  82. struct boot_sector_16 {
  83. __u8 ignored[3]; /* Boot strap short or near jump */
  84. __u8 system_id[8]; /* Name - can be used to special case
  85. partition manager volumes */
  86. __u8 sector_size[2]; /* bytes per logical sector */
  87. __u8 cluster_size; /* sectors/cluster */
  88. __u16 reserved; /* reserved sectors */
  89. __u8 fats; /* number of FATs */
  90. __u8 dir_entries[2]; /* root directory entries */
  91. __u8 sectors[2]; /* number of sectors */
  92. __u8 media; /* media code (unused) */
  93. __u16 fat_length; /* sectors/FAT */
  94. __u16 secs_track; /* sectors per track */
  95. __u16 heads; /* number of heads */
  96. __u32 hidden; /* hidden sectors (unused) */
  97. __u32 total_sect; /* number of sectors (if sectors == 0) */
  98. __u8 drive_number; /* Logical Drive Number */
  99. __u8 reserved2; /* Unused */
  100. __u8 extended_sig; /* Extended Signature (0x29) */
  101. __u32 serial; /* Serial number */
  102. __u8 label[11]; /* FS label */
  103. __u8 fs_type[8]; /* FS Type */
  104. /* fill up to 512 bytes */
  105. __u8 junk[450];
  106. } __attribute__ ((packed));
  107. struct info_sector {
  108. __u32 magic; /* Magic for info sector ('RRaA') */
  109. __u8 junk[0x1dc];
  110. __u32 reserved1; /* Nothing as far as I can tell */
  111. __u32 signature; /* 0x61417272 ('rrAa') */
  112. __u32 free_clusters; /* Free cluster count. -1 if unknown */
  113. __u32 next_cluster; /* Most recently allocated cluster. */
  114. __u32 reserved2[3];
  115. __u16 reserved3;
  116. __u16 boot_sign;
  117. };
  118. typedef struct {
  119. __u8 name[8], ext[3]; /* name and extension */
  120. __u8 attr; /* attribute bits */
  121. __u8 lcase; /* Case for base and extension */
  122. __u8 ctime_ms; /* Creation time, milliseconds */
  123. __u16 ctime; /* Creation time */
  124. __u16 cdate; /* Creation date */
  125. __u16 adate; /* Last access date */
  126. __u16 starthi; /* High 16 bits of cluster in FAT32 */
  127. __u16 time, date, start; /* time, date and first cluster */
  128. __u32 size; /* file size (in bytes) */
  129. } __attribute__ ((packed)) DIR_ENT;
  130. typedef struct _dos_file {
  131. DIR_ENT dir_ent;
  132. char *lfn;
  133. loff_t offset;
  134. loff_t lfn_offset;
  135. struct _dos_file *parent; /* parent directory */
  136. struct _dos_file *next; /* next entry */
  137. struct _dos_file *first; /* first entry (directory only) */
  138. } DOS_FILE;
  139. typedef struct {
  140. unsigned long value;
  141. unsigned long reserved;
  142. } FAT_ENTRY;
  143. typedef struct {
  144. int nfats;
  145. loff_t fat_start;
  146. unsigned int fat_size; /* unit is bytes */
  147. unsigned int fat_bits; /* size of a FAT entry */
  148. unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
  149. unsigned long root_cluster; /* 0 for old-style root dir */
  150. loff_t root_start;
  151. unsigned int root_entries;
  152. loff_t data_start;
  153. unsigned int cluster_size;
  154. unsigned long clusters;
  155. loff_t fsinfo_start; /* 0 if not present */
  156. long free_clusters;
  157. loff_t backupboot_start; /* 0 if not present */
  158. unsigned char *fat;
  159. DOS_FILE **cluster_owner;
  160. char *label;
  161. } DOS_FS;
  162. #ifndef offsetof
  163. #define offsetof(t,e) ((int)&(((t *)0)->e))
  164. #endif
  165. extern int interactive, rw, list, verbose, test, write_immed;
  166. extern int atari_format;
  167. extern unsigned n_files;
  168. extern void *mem_queue;
  169. /* value to use as end-of-file marker */
  170. #define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
  171. #define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
  172. /* value to mark bad clusters */
  173. #define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs))
  174. /* range of values used for bad clusters */
  175. #define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
  176. #define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
  177. #define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
  178. /* return -16 as a number with fs->fat_bits bits */
  179. #define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf)
  180. /* marker for files with no 8.3 name */
  181. #define FAT_NO_83NAME 32
  182. #endif