rosapps/sysutils/dosfsck/dosfsck.h

   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 "types.h"
  13
  14 #ifdef _WIN32
  15
  16 typedef unsigned char __u8;
  17 typedef unsigned short __u16;
  18 typedef unsigned int __u32;
  19 typedef unsigned __int64 __u64;
  20 typedef unsigned short __le16;
  21 typedef unsigned long  __le32;
  22 typedef __int64 loff_t;
  23 typedef __int64 ll_t;
  24
  25 #endif
  26
  27 #define _LINUX_STAT_H           /* hack to avoid inclusion of <linux/stat.h> */
  28 #define _LINUX_STRING_H_        /* hack to avoid inclusion of <linux/string.h>*/
  29 #define _LINUX_FS_H             /* hack to avoid inclusion of <linux/fs.h> */
  30
  31 //#include <linux/version.h>
  32 //# include "types.h"
  33 # include "byteorder.h"
  34
  35 #include "msdos_fs.h"
  36
  37 #undef CF_LE_W
  38 #undef CF_LE_L
  39 #undef CT_LE_W
  40 #undef CT_LE_L
  41
  42 #if __BYTE_ORDER == __BIG_ENDIAN
  43 #include "byteswap.h"
  44 #define CF_LE_W(v) bswap_16(v)
  45 #define CF_LE_L(v) bswap_32(v)
  46 #define CT_LE_W(v) CF_LE_W(v)
  47 #define CT_LE_L(v) CF_LE_L(v)
  48 #else
  49 #define CF_LE_W(v) (v)
  50 #define CF_LE_L(v) (v)
  51 #define CT_LE_W(v) (v)
  52 #define CT_LE_L(v) (v)
  53 #endif /* __BIG_ENDIAN */
  54
  55 #define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
  56
  57 /* ++roman: Use own definition of boot sector structure -- the kernel headers'
  58  * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
  59 struct boot_sector {
  60     __u8        ignored[3];     /* Boot strap short or near jump */
  61     __u8        system_id[8];   /* Name - can be used to special case
  62                                    partition manager volumes */
  63     __u8        sector_size[2]; /* bytes per logical sector */
  64     __u8        cluster_size;   /* sectors/cluster */
  65     __u16       reserved;       /* reserved sectors */
  66     __u8        fats;           /* number of FATs */
  67     __u8        dir_entries[2]; /* root directory entries */
  68     __u8        sectors[2];     /* number of sectors */
  69     __u8        media;          /* media code (unused) */
  70     __u16       fat_length;     /* sectors/FAT */
  71     __u16       secs_track;     /* sectors per track */
  72     __u16       heads;          /* number of heads */
  73     __u32       hidden;         /* hidden sectors (unused) */
  74     __u32       total_sect;     /* number of sectors (if sectors == 0) */
  75
  76     /* The following fields are only used by FAT32 */
  77     __u32       fat32_length;   /* sectors/FAT */
  78     __u16       flags;          /* bit 8: fat mirroring, low 4: active fat */
  79     __u8        version[2];     /* major, minor filesystem version */
  80     __u32       root_cluster;   /* first cluster in root directory */
  81     __u16       info_sector;    /* filesystem info sector */
  82     __u16       backup_boot;    /* backup boot sector */
  83     __u16       reserved2[6];   /* Unused */
  84
  85     /* fill up to 512 bytes */
  86     __u8        junk[448];
  87 } __attribute__ ((packed));
  88
  89 struct info_sector {
  90     __u32       magic;          /* Magic for info sector ('RRaA') */
  91     __u8        junk[0x1dc];
  92     __u32       reserved1;      /* Nothing as far as I can tell */
  93     __u32       signature;      /* 0x61417272 ('rrAa') */
  94     __u32       free_clusters;  /* Free cluster count.  -1 if unknown */
  95     __u32       next_cluster;   /* Most recently allocated cluster. */
  96     __u32       reserved2[3];
  97     __u16       reserved3;
  98     __u16       boot_sign;
  99 };
 100
 101 typedef struct {
 102     __u8        name[8],ext[3]; /* name and extension */
 103     __u8        attr;           /* attribute bits */
 104     __u8        lcase;          /* Case for base and extension */
 105     __u8        ctime_ms;       /* Creation time, milliseconds */
 106     __u16       ctime;          /* Creation time */
 107     __u16       cdate;          /* Creation date */
 108     __u16       adate;          /* Last access date */
 109     __u16       starthi;        /* High 16 bits of cluster in FAT32 */
 110     __u16       time,date,start;/* time, date and first cluster */
 111     __u32       size;           /* file size (in bytes) */
 112 } DIR_ENT;
 113
 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
 123 typedef struct {
 124     unsigned long value;
 125     unsigned long reserved;
 126     DOS_FILE *owner;
 127     int prev; /* number of previous clusters */
 128 } FAT_ENTRY;
 129
 130 typedef struct {
 131     int nfats;
 132     loff_t fat_start;
 133     unsigned int fat_size; /* unit is bytes */
 134     unsigned int fat_bits; /* size of a FAT entry */
 135     unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
 136     unsigned long root_cluster; /* 0 for old-style root dir */
 137     loff_t root_start;
 138     unsigned int root_entries;
 139     loff_t data_start;
 140     unsigned int cluster_size;
 141     unsigned long clusters;
 142     loff_t fsinfo_start; /* 0 if not present */
 143     long free_clusters;
 144     loff_t backupboot_start; /* 0 if not present */
 145     FAT_ENTRY *fat;
 146 } DOS_FS;
 147
 148 #ifndef offsetof
 149 #define offsetof(t,e)   ((int)&(((t *)0)->e))
 150 #endif
 151
 152 extern int interactive,list,verbose,test,write_immed;
 153 extern int atari_format;
 154 extern unsigned n_files;
 155 extern void *mem_queue;
 156
 157 /* value to use as end-of-file marker */
 158 #define FAT_EOF(fs)     ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
 159 #define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
 160 /* value to mark bad clusters */
 161 #define FAT_BAD(fs)     (0xff7 | FAT_EXTD(fs))
 162 /* range of values used for bad clusters */
 163 #define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
 164 #define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
 165 #define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
 166
 167 /* return -16 as a number with fs->fat_bits bits */
 168 #define FAT_EXTD(fs)    (((1 << fs->eff_fat_bits)-1) & ~0xf)
 169
 170 #endif
 171
 172 /* Local Variables: */
 173 /* tab-width: 8     */
 174 /* End:             */