ReactOS  0.4.13-dev-73-gcfe54aa
fat.h File Reference
#include <pshpack1.h>
#include <poppack.h>
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Classes

struct  _FAT_BOOTSECTOR
 
struct  _FAT32_BOOTSECTOR
 
struct  _FATX_BOOTSECTOR
 
struct  DIRENTRY
 
struct  LFN_DIRENTRY
 
struct  FATX_DIRENTRY
 
struct  FAT_FILE_INFO
 

Macros

#define ATTR_NORMAL   0x00
 
#define ATTR_READONLY   0x01
 
#define ATTR_HIDDEN   0x02
 
#define ATTR_SYSTEM   0x04
 
#define ATTR_VOLUMENAME   0x08
 
#define ATTR_DIRECTORY   0x10
 
#define ATTR_ARCHIVE   0x20
 
#define ATTR_LONG_NAME   (ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM | ATTR_VOLUMENAME)
 
#define FAT12   1
 
#define FAT16   2
 
#define FAT32   3
 
#define FATX16   4
 
#define FATX32   5
 
#define ISFATX(FT)   ((FT) == FATX16 || (FT) == FATX32)
 

Typedefs

typedef struct _FAT_BOOTSECTOR FAT_BOOTSECTOR
 
typedef struct _FAT_BOOTSECTORPFAT_BOOTSECTOR
 
typedef struct _FAT32_BOOTSECTOR FAT32_BOOTSECTOR
 
typedef struct _FAT32_BOOTSECTORPFAT32_BOOTSECTOR
 
typedef struct _FATX_BOOTSECTOR FATX_BOOTSECTOR
 
typedef struct _FATX_BOOTSECTORPFATX_BOOTSECTOR
 
typedef struct DIRENTRYPDIRENTRY
 
typedef struct LFN_DIRENTRYPLFN_DIRENTRY
 
typedef struct FATX_DIRENTRYPFATX_DIRENTRY
 
typedef struct _FAT_VOLUME_INFOPFAT_VOLUME_INFO
 
typedef struct FAT_FILE_INFOPFAT_FILE_INFO
 

Functions

const DEVVTBLFatMount (ULONG DeviceId)
 

Macro Definition Documentation

◆ ATTR_ARCHIVE

#define ATTR_ARCHIVE   0x20

Definition at line 164 of file fat.h.

◆ ATTR_DIRECTORY

#define ATTR_DIRECTORY   0x10

Definition at line 163 of file fat.h.

◆ ATTR_HIDDEN

#define ATTR_HIDDEN   0x02

Definition at line 160 of file fat.h.

◆ ATTR_LONG_NAME

Definition at line 165 of file fat.h.

◆ ATTR_NORMAL

#define ATTR_NORMAL   0x00

Definition at line 158 of file fat.h.

◆ ATTR_READONLY

#define ATTR_READONLY   0x01

Definition at line 159 of file fat.h.

◆ ATTR_SYSTEM

#define ATTR_SYSTEM   0x04

Definition at line 161 of file fat.h.

◆ ATTR_VOLUMENAME

#define ATTR_VOLUMENAME   0x08

Definition at line 162 of file fat.h.

◆ FAT12

#define FAT12   1

Definition at line 167 of file fat.h.

◆ FAT16

#define FAT16   2

Definition at line 168 of file fat.h.

◆ FAT32

#define FAT32   3

Definition at line 169 of file fat.h.

◆ FATX16

#define FATX16   4

Definition at line 170 of file fat.h.

◆ FATX32

#define FATX32   5

Definition at line 171 of file fat.h.

◆ ISFATX

#define ISFATX (   FT)    ((FT) == FATX16 || (FT) == FATX32)

Definition at line 173 of file fat.h.

Typedef Documentation

◆ FAT32_BOOTSECTOR

◆ FAT_BOOTSECTOR

◆ FATX_BOOTSECTOR

◆ PDIRENTRY

◆ PFAT32_BOOTSECTOR

◆ PFAT_BOOTSECTOR

◆ PFAT_FILE_INFO

◆ PFAT_VOLUME_INFO

Definition at line 146 of file fat.h.

◆ PFATX_BOOTSECTOR

◆ PFATX_DIRENTRY

◆ PLFN_DIRENTRY

Function Documentation

◆ FatMount()

const DEVVTBL* FatMount ( ULONG  DeviceId)

Definition at line 1513 of file fat.c.

1514 {
1516  UCHAR Buffer[512];
1519  PFATX_BOOTSECTOR BootSectorX = (PFATX_BOOTSECTOR)Buffer;
1522  ULONG Count;
1525 
1526  //
1527  // Allocate data for volume information
1528  //
1530  if (!Volume)
1531  return NULL;
1533 
1534  //
1535  // Read the BootSector
1536  //
1537  Position.HighPart = 0;
1538  Position.LowPart = 0;
1539  Status = ArcSeek(DeviceId, &Position, SeekAbsolute);
1540  if (Status != ESUCCESS)
1541  {
1543  return NULL;
1544  }
1545  Status = ArcRead(DeviceId, Buffer, sizeof(Buffer), &Count);
1546  if (Status != ESUCCESS || Count != sizeof(Buffer))
1547  {
1549  return NULL;
1550  }
1551 
1552  //
1553  // Check if BootSector is valid. If no, return early
1554  //
1555  if (!RtlEqualMemory(BootSector->FileSystemType, "FAT12 ", 8) &&
1556  !RtlEqualMemory(BootSector->FileSystemType, "FAT16 ", 8) &&
1557  !RtlEqualMemory(BootSector32->FileSystemType, "FAT32 ", 8) &&
1558  !RtlEqualMemory(BootSectorX->FileSystemType, "FATX", 4))
1559  {
1561  return NULL;
1562  }
1563 
1564  //
1565  // Determine sector count
1566  //
1568  if (Status != ESUCCESS)
1569  {
1571  return NULL;
1572  }
1573  SectorCount.HighPart = FileInformation.EndingAddress.HighPart;
1574  SectorCount.LowPart = FileInformation.EndingAddress.LowPart;
1575  SectorCount.QuadPart /= SECTOR_SIZE;
1576 
1577  //
1578  // Keep device id
1579  //
1580  Volume->DeviceId = DeviceId;
1581 
1582  //
1583  // Really open the volume
1584  //
1585  if (!FatOpenVolume(Volume, BootSector, SectorCount.QuadPart))
1586  {
1588  return NULL;
1589  }
1590 
1591  //
1592  // Remember FAT volume information
1593  //
1594  FatVolumes[DeviceId] = Volume;
1595 
1596  //
1597  // Return success
1598  //
1599  return &FatFuncTable;
1600 }
Definition: arc.h:32
static COORD Position
Definition: mouse.c:34
static OUT PIO_STATUS_BLOCK OUT PVOID FileInformation
Definition: pipe.c:75
_Inout_ __drv_aliasesMem PSLIST_ENTRY _Inout_ PSLIST_ENTRY _In_ ULONG Count
Definition: exfuncs.h:1015
ULONG ARC_STATUS
Definition: arc.h:4
#define SECTOR_SIZE
Definition: winldr.h:34
struct _FAT32_BOOTSECTOR * PFAT32_BOOTSECTOR
FORCEINLINE PVOID FrLdrTempAlloc(_In_ SIZE_T Size, _In_ ULONG Tag)
Definition: mm.h:177
smooth NULL
Definition: ftsmooth.c:416
Definition: bufpool.h:45
NTSYSAPI ULONG NTAPI RtlEqualMemory(CONST VOID *Source1, CONST VOID *Source2, ULONG Length)
PFAT_VOLUME_INFO FatVolumes[MAX_FDS]
Definition: fat.c:60
#define TAG_FAT_VOLUME
Definition: fat.c:41
ARC_STATUS ArcRead(ULONG FileId, VOID *Buffer, ULONG N, ULONG *Count)
Definition: fs.c:237
struct _FAT_BOOTSECTOR * PFAT_BOOTSECTOR
unsigned char UCHAR
Definition: xmlstorage.h:181
ARC_STATUS ArcSeek(ULONG FileId, LARGE_INTEGER *Position, SEEKMODE SeekMode)
Definition: fs.c:244
const DEVVTBL FatFuncTable
Definition: fat.c:1503
ULONG SectorCount
Definition: part_xbox.c:32
BOOLEAN FatOpenVolume(PFAT_VOLUME_INFO Volume, PFAT_BOOTSECTOR BootSector, ULONGLONG PartitionSectorCount)
Definition: fat.c:140
Status
Definition: gdiplustypes.h:24
ARC_STATUS ArcGetFileInformation(ULONG FileId, FILEINFORMATION *Information)
Definition: fs.c:251
unsigned int ULONG
Definition: retypes.h:1
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:261
CHAR FileSystemType[4]
Definition: fat.h:90
struct _FATX_BOOTSECTOR * PFATX_BOOTSECTOR
FORCEINLINE VOID FrLdrTempFree(PVOID Allocation, ULONG Tag)
Definition: mm.h:186