dosfsck.h 6.5 KB

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  1. /* dosfsck.h - Common data structures and global variables */
  2. /* Written 1993 by Werner Almesberger */
  3. /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
  4. * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
  5. #ifndef _DOSFSCK_H
  6. #define _DOSFSCK_H
  7. #include <sys/types.h>
  8. #define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
  9. #define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/
  10. #define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
  11. # include <asm/types.h>
  12. # include <asm/byteorder.h>
  13. #include <linux/msdos_fs.h>
  14. #undef CF_LE_W
  15. #undef CF_LE_L
  16. #undef CT_LE_W
  17. #undef CT_LE_L
  18. #if __BYTE_ORDER == __BIG_ENDIAN
  19. #include <byteswap.h>
  20. #define CF_LE_W(v) bswap_16(v)
  21. #define CF_LE_L(v) bswap_32(v)
  22. #define CT_LE_W(v) CF_LE_W(v)
  23. #define CT_LE_L(v) CF_LE_L(v)
  24. #else
  25. #define CF_LE_W(v) (v)
  26. #define CF_LE_L(v) (v)
  27. #define CT_LE_W(v) (v)
  28. #define CT_LE_L(v) (v)
  29. #endif /* __BIG_ENDIAN */
  30. #define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
  31. /* ++roman: Use own definition of boot sector structure -- the kernel headers'
  32. * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
  33. struct boot_sector {
  34. __u8 ignored[3]; /* Boot strap short or near jump */
  35. __u8 system_id[8]; /* Name - can be used to special case
  36. partition manager volumes */
  37. __u8 sector_size[2]; /* bytes per logical sector */
  38. __u8 cluster_size; /* sectors/cluster */
  39. __u16 reserved; /* reserved sectors */
  40. __u8 fats; /* number of FATs */
  41. __u8 dir_entries[2]; /* root directory entries */
  42. __u8 sectors[2]; /* number of sectors */
  43. __u8 media; /* media code (unused) */
  44. __u16 fat_length; /* sectors/FAT */
  45. __u16 secs_track; /* sectors per track */
  46. __u16 heads; /* number of heads */
  47. __u32 hidden; /* hidden sectors (unused) */
  48. __u32 total_sect; /* number of sectors (if sectors == 0) */
  49. /* The following fields are only used by FAT32 */
  50. __u32 fat32_length; /* sectors/FAT */
  51. __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
  52. __u8 version[2]; /* major, minor filesystem version */
  53. __u32 root_cluster; /* first cluster in root directory */
  54. __u16 info_sector; /* filesystem info sector */
  55. __u16 backup_boot; /* backup boot sector */
  56. __u8 reserved2[12]; /* Unused */
  57. __u8 drive_number; /* Logical Drive Number */
  58. __u8 reserved3; /* Unused */
  59. __u8 extended_sig; /* Extended Signature (0x29) */
  60. __u32 serial; /* Serial number */
  61. __u8 label[11]; /* FS label */
  62. __u8 fs_type[8]; /* FS Type */
  63. /* fill up to 512 bytes */
  64. __u8 junk[422];
  65. } __attribute__ ((packed));
  66. struct boot_sector_16 {
  67. __u8 ignored[3]; /* Boot strap short or near jump */
  68. __u8 system_id[8]; /* Name - can be used to special case
  69. partition manager volumes */
  70. __u8 sector_size[2]; /* bytes per logical sector */
  71. __u8 cluster_size; /* sectors/cluster */
  72. __u16 reserved; /* reserved sectors */
  73. __u8 fats; /* number of FATs */
  74. __u8 dir_entries[2]; /* root directory entries */
  75. __u8 sectors[2]; /* number of sectors */
  76. __u8 media; /* media code (unused) */
  77. __u16 fat_length; /* sectors/FAT */
  78. __u16 secs_track; /* sectors per track */
  79. __u16 heads; /* number of heads */
  80. __u32 hidden; /* hidden sectors (unused) */
  81. __u32 total_sect; /* number of sectors (if sectors == 0) */
  82. __u8 drive_number; /* Logical Drive Number */
  83. __u8 reserved2; /* Unused */
  84. __u8 extended_sig; /* Extended Signature (0x29) */
  85. __u32 serial; /* Serial number */
  86. __u8 label[11]; /* FS label */
  87. __u8 fs_type[8]; /* FS Type */
  88. /* fill up to 512 bytes */
  89. __u8 junk[450];
  90. } __attribute__ ((packed));
  91. struct info_sector {
  92. __u32 magic; /* Magic for info sector ('RRaA') */
  93. __u8 junk[0x1dc];
  94. __u32 reserved1; /* Nothing as far as I can tell */
  95. __u32 signature; /* 0x61417272 ('rrAa') */
  96. __u32 free_clusters; /* Free cluster count. -1 if unknown */
  97. __u32 next_cluster; /* Most recently allocated cluster. */
  98. __u32 reserved2[3];
  99. __u16 reserved3;
  100. __u16 boot_sign;
  101. };
  102. typedef struct {
  103. __u8 name[8],ext[3]; /* name and extension */
  104. __u8 attr; /* attribute bits */
  105. __u8 lcase; /* Case for base and extension */
  106. __u8 ctime_ms; /* Creation time, milliseconds */
  107. __u16 ctime; /* Creation time */
  108. __u16 cdate; /* Creation date */
  109. __u16 adate; /* Last access date */
  110. __u16 starthi; /* High 16 bits of cluster in FAT32 */
  111. __u16 time,date,start;/* time, date and first cluster */
  112. __u32 size; /* file size (in bytes) */
  113. } DIR_ENT;
  114. typedef struct _dos_file {
  115. DIR_ENT dir_ent;
  116. char *lfn;
  117. loff_t offset;
  118. struct _dos_file *parent; /* parent directory */
  119. struct _dos_file *next; /* next entry */
  120. struct _dos_file *first; /* first entry (directory only) */
  121. } DOS_FILE;
  122. typedef struct {
  123. unsigned long value;
  124. unsigned long reserved;
  125. DOS_FILE *owner;
  126. int prev; /* number of previous clusters */
  127. } FAT_ENTRY;
  128. typedef struct {
  129. int nfats;
  130. loff_t fat_start;
  131. unsigned int fat_size; /* unit is bytes */
  132. unsigned int fat_bits; /* size of a FAT entry */
  133. unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
  134. unsigned long root_cluster; /* 0 for old-style root dir */
  135. loff_t root_start;
  136. unsigned int root_entries;
  137. loff_t data_start;
  138. unsigned int cluster_size;
  139. unsigned long clusters;
  140. loff_t fsinfo_start; /* 0 if not present */
  141. long free_clusters;
  142. loff_t backupboot_start; /* 0 if not present */
  143. FAT_ENTRY *fat;
  144. char *label;
  145. } DOS_FS;
  146. #ifndef offsetof
  147. #define offsetof(t,e) ((int)&(((t *)0)->e))
  148. #endif
  149. extern int interactive,list,verbose,test,write_immed;
  150. extern int atari_format;
  151. extern unsigned n_files;
  152. extern void *mem_queue;
  153. /* value to use as end-of-file marker */
  154. #define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
  155. #define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
  156. /* value to mark bad clusters */
  157. #define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs))
  158. /* range of values used for bad clusters */
  159. #define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
  160. #define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
  161. #define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
  162. /* return -16 as a number with fs->fat_bits bits */
  163. #define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf)
  164. #endif
  165. /* Local Variables: */
  166. /* tab-width: 8 */
  167. /* End: */