1/* dosfsck.h - Common data structures and global variables */ 2 3/* Written 1993 by Werner Almesberger */ 4 5/* FAT32, VFAT, Atari format support, and various fixes additions May 1998 6 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */ 7 8 9#ifndef _DOSFSCK_H 10#define _DOSFSCK_H 11 12#include <sys/types.h> 13#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */ 14#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/ 15#include <linux/msdos_fs.h> 16 17/* 2.1 kernels use le16_to_cpu() type functions for CF_LE_W & Co., but don't 18 * export this macros, only __le16_to_cpu(). */ 19#ifndef le16_to_cpu 20#define le16_to_cpu __le16_to_cpu 21#define le32_to_cpu __le32_to_cpu 22#define cpu_to_le16 __cpu_to_le16 23#define cpu_to_le32 __cpu_to_le32 24#endif 25 26#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME) 27 28/* ++roman: Use own definition of boot sector structure -- the kernel headers' 29 * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */ 30struct boot_sector { 31 __u8 ignored[3]; /* Boot strap short or near jump */ 32 __u8 system_id[8]; /* Name - can be used to special case 33 partition manager volumes */ 34 __u8 sector_size[2]; /* bytes per logical sector */ 35 __u8 cluster_size; /* sectors/cluster */ 36 __u16 reserved; /* reserved sectors */ 37 __u8 fats; /* number of FATs */ 38 __u8 dir_entries[2]; /* root directory entries */ 39 __u8 sectors[2]; /* number of sectors */ 40 __u8 media; /* media code (unused) */ 41 __u16 fat_length; /* sectors/FAT */ 42 __u16 secs_track; /* sectors per track */ 43 __u16 heads; /* number of heads */ 44 __u32 hidden; /* hidden sectors (unused) */ 45 __u32 total_sect; /* number of sectors (if sectors == 0) */ 46 47 /* The following fields are only used by FAT32 */ 48 __u32 fat32_length; /* sectors/FAT */ 49 __u16 flags; /* bit 8: fat mirroring, low 4: active fat */ 50 __u8 version[2]; /* major, minor filesystem version */ 51 __u32 root_cluster; /* first cluster in root directory */ 52 __u16 info_sector; /* filesystem info sector */ 53 __u16 backup_boot; /* backup boot sector */ 54 __u16 reserved2[6]; /* Unused */ 55 56 /* fill up to 512 bytes */ 57 __u8 junk[448]; 58} __attribute__ ((packed)); 59 60struct info_sector { 61 __u32 magic; /* Magic for info sector ('RRaA') */ 62 __u8 junk[0x1dc]; 63 __u32 reserved1; /* Nothing as far as I can tell */ 64 __u32 signature; /* 0x61417272 ('rrAa') */ 65 __u32 free_clusters; /* Free cluster count. -1 if unknown */ 66 __u32 next_cluster; /* Most recently allocated cluster. */ 67 __u32 reserved2[3]; 68 __u16 reserved3; 69 __u16 boot_sign; 70}; 71 72typedef struct { 73 __s8 name[8],ext[3]; /* name and extension */ 74 __u8 attr; /* attribute bits */ 75 __u8 lcase; /* Case for base and extension */ 76 __u8 ctime_ms; /* Creation time, milliseconds */ 77 __u16 ctime; /* Creation time */ 78 __u16 cdate; /* Creation date */ 79 __u16 adate; /* Last access date */ 80 __u16 starthi; /* High 16 bits of cluster in FAT32 */ 81 __u16 time,date,start;/* time, date and first cluster */ 82 __u32 size; /* file size (in bytes) */ 83} DIR_ENT; 84 85typedef struct _dos_file { 86 DIR_ENT dir_ent; 87 char *lfn; 88 loff_t offset; 89 struct _dos_file *parent; /* parent directory */ 90 struct _dos_file *next; /* next entry */ 91 struct _dos_file *first; /* first entry (directory only) */ 92} DOS_FILE; 93 94typedef struct { 95 unsigned long value; 96 unsigned long reserved; 97 DOS_FILE *owner; 98 int prev; /* number of previous clusters */ 99} FAT_ENTRY; 100 101typedef struct { 102 loff_t fat_start; 103 unsigned int fat_size; /* unit is bytes */ 104 unsigned int fat_bits; /* size of a FAT entry */ 105 unsigned int eff_fat_bits; /* # of used bits in a FAT entry */ 106 unsigned long root_cluster; /* 0 for old-style root dir */ 107 loff_t root_start; 108 unsigned int root_entries; 109 loff_t data_start; 110 unsigned int cluster_size; 111 unsigned long clusters; 112 loff_t fsinfo_start; /* 0 if not present */ 113 long free_clusters; 114 loff_t backupboot_start; /* 0 if not present */ 115 unsigned char volume_id[4]; 116 FAT_ENTRY *fat; 117} DOS_FS; 118 119#ifndef offsetof 120#define offsetof(t,e) ((int)&(((t *)0)->e)) 121#endif 122 123extern int interactive,list,verbose,test,write_immed; 124extern int atari_format; 125extern unsigned n_files; 126extern void *mem_queue; 127 128/* value to use as end-of-file marker */ 129#define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs)) 130#define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs))) 131/* value to mark bad clusters */ 132#define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs)) 133/* range of values used for bad clusters */ 134#define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs)) 135#define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs)) 136#define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs)) 137 138/* return -16 as a number with fs->fat_bits bits */ 139#define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf) 140 141#endif 142 143/* Local Variables: */ 144/* tab-width: 8 */ 145/* End: */ 146