dosfsck.h

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/* dosfsck.h  -  Common data structures and global variables */

/* Written 1993 by Werner Almesberger */

/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
 * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */


#ifndef _DOSFSCK_H
#define _DOSFSCK_H

//#include "types.h"

#ifdef _WIN32

typedef unsigned char __u8;
typedef unsigned short __u16;
typedef unsigned int __u32;
typedef unsigned __int64 __u64;
typedef unsigned short __le16;
typedef unsigned int  __le32;
typedef __int64 loff_t;
typedef __int64 ll_t;

#define CF_LE_W(v) (v)
#define CF_LE_L(v) (v)
#define CT_LE_W(v) (v)
#define CT_LE_L(v) (v)

#endif

#ifdef _M_IX86
#include "byteorder.h"
#endif

#include "msdos_fs.h"

#if 0
#undef CF_LE_W
#undef CF_LE_L
#undef CT_LE_W
#undef CT_LE_L
#endif

#if __BYTE_ORDER == __BIG_ENDIAN
#include "byteswap.h"
#if 0
#define CF_LE_W(v) bswap_16(v)
#define CF_LE_L(v) bswap_32(v)
#define CT_LE_W(v) CF_LE_W(v)
#define CT_LE_L(v) CF_LE_L(v)
#endif
#else
#define CF_LE_W(v) (v)
#define CF_LE_L(v) (v)
#define CT_LE_W(v) (v)
#define CT_LE_L(v) (v)
#endif /* __BIG_ENDIAN */

#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)

#include <pshpack1.h>

/* ++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 {
    __u8    ignored[3]; /* Boot strap short or near jump */
    __u8    system_id[8];   /* Name - can be used to special case
                   partition manager volumes */
    __u8    sector_size[2]; /* bytes per logical sector */
    __u8    cluster_size;   /* sectors/cluster */
    __u16   reserved;   /* reserved sectors */
    __u8    fats;       /* number of FATs */
    __u8    dir_entries[2]; /* root directory entries */
    __u8    sectors[2]; /* number of sectors */
    __u8    media;      /* media code (unused) */
    __u16   fat_length; /* sectors/FAT */
    __u16   secs_track; /* sectors per track */
    __u16   heads;      /* number of heads */
    __u32   hidden;     /* hidden sectors (unused) */
    __u32   total_sect; /* number of sectors (if sectors == 0) */

    /* The following fields are only used by FAT32 */
    __u32   fat32_length;   /* sectors/FAT */
    __u16   flags;      /* bit 8: fat mirroring, low 4: active fat */
    __u8    version[2]; /* major, minor filesystem version */
    __u32   root_cluster;   /* first cluster in root directory */
    __u16   info_sector;    /* filesystem info sector */
    __u16   backup_boot;    /* backup boot sector */
    __u16   reserved2[6];   /* Unused */

    /* fill up to 512 bytes */
    __u8    junk[448];
};

#include <poppack.h>

struct info_sector {
    __u32   magic;      /* Magic for info sector ('RRaA') */
    __u8    junk[0x1dc];
    __u32   reserved1;  /* Nothing as far as I can tell */
    __u32   signature;  /* 0x61417272 ('rrAa') */
    __u32   free_clusters;  /* Free cluster count.  -1 if unknown */
    __u32   next_cluster;   /* Most recently allocated cluster. */
    __u32   reserved2[3];
    __u16   reserved3;
    __u16   boot_sign;
};

typedef struct {
    __u8    name[8],ext[3]; /* name and extension */
    __u8    attr;       /* attribute bits */
    __u8    lcase;      /* Case for base and extension */
    __u8    ctime_ms;   /* Creation time, milliseconds */
    __u16   ctime;      /* Creation time */
    __u16   cdate;      /* Creation date */
    __u16   adate;      /* Last access date */
    __u16   starthi;    /* High 16 bits of cluster in FAT32 */
    __u16   time,date,start;/* time, date and first cluster */
    __u32   size;       /* file size (in bytes) */
} DIR_ENT;

typedef struct _dos_file {
    DIR_ENT dir_ent;
    char *lfn;
    loff_t 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 {
    unsigned long value;
    unsigned long reserved;
    DOS_FILE *owner;
    int prev; /* number of previous clusters */
} 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 */
    unsigned long root_cluster; /* 0 for old-style root dir */
    loff_t root_start;
    unsigned int root_entries;
    loff_t data_start;
    unsigned int cluster_size;
    unsigned long clusters;
    loff_t fsinfo_start; /* 0 if not present */
    long free_clusters;
    loff_t backupboot_start; /* 0 if not present */
    FAT_ENTRY *fat;
} DOS_FS;

#ifndef offsetof
#define offsetof(t,e)   ((int)&(((t *)0)->e))
#endif

#define FSCHECK_INTERACTIVE     0x01
#define FSCHECK_LIST_FILES      0x02
#define FSCHECK_TEST_READ       0x04
#define FSCHECK_VERBOSE         0x08
#define FSCHECK_IMMEDIATE_WRITE 0x10

extern ULONG FsCheckFlags;
extern ULONG FsCheckTotalFiles;
extern void *FsCheckMemQueue;

/* value to use as end-of-file marker */
#define FAT_EOF(fs) (0xff8 | FAT_EXTD(fs))
#define FAT_IS_EOF(fs,v) ((unsigned long)(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) (0xff7 | FAT_EXTD(fs))
#define FAT_MAX_BAD(fs) (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)

#endif

/* Local Variables: */
/* tab-width: 8     */
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