lib/fslib/vfatlib/vfatlib.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS VFAT filesystem library
   4  * FILE:        vfatlib.c
   5  * PURPOSE:     Main API
   6  * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
   7  * REVISIONS:
   8  *   CSH 05/04-2003 Created
   9  */
  10 #define NDEBUG
  11 #include <debug.h>
  12 #define NTOS_MODE_USER
  13 #include <ntos.h>
  14 #include <ddk/ntddscsi.h>
  15 #include <fslib/vfatlib.h>
  16 #include "vfatlib.h"
  17
  18
  19 NTSTATUS
  20 VfatInitialize(VOID)
  21 {
  22   DPRINT("VfatInitialize()\n");
  23
  24   return STATUS_SUCCESS;
  25 }
  26
  27
  28 NTSTATUS
  29 VfatFormat(
  30         PUNICODE_STRING  DriveRoot,
  31         DWORD  MediaFlag,
  32         PUNICODE_STRING  Label,
  33         BOOL  QuickFormat,
  34         DWORD  ClusterSize,
  35         PFMIFSCALLBACK  Callback)
  36 {
  37   OBJECT_ATTRIBUTES ObjectAttributes;
  38   DISK_GEOMETRY DiskGeometry;
  39   IO_STATUS_BLOCK Iosb;
  40   HANDLE FileHandle;
  41   PARTITION_INFORMATION PartitionInfo;
  42   NTSTATUS Status;
  43
  44   DPRINT("VfatFormat(DriveRoot '%wZ')\n", DriveRoot);
  45
  46   InitializeObjectAttributes(&ObjectAttributes,
  47     DriveRoot,
  48     0,
  49     NULL,
  50     NULL);
  51
  52   Status = NtOpenFile(&FileHandle,
  53     FILE_WRITE_ACCESS | FILE_WRITE_ATTRIBUTES,
  54     &ObjectAttributes,
  55     &Iosb,
  56     1,
  57     FILE_SYNCHRONOUS_IO_ALERT);
  58   if (!NT_SUCCESS(Status))
  59     {
  60       DPRINT("NtOpenFile() failed with status 0x%.08x\n", Status);
  61       return Status;
  62     }
  63
  64   Status = NtDeviceIoControlFile(FileHandle,
  65     NULL,
  66     NULL,
  67     NULL,
  68     &Iosb,
  69     IOCTL_DISK_GET_DRIVE_GEOMETRY,
  70     NULL,
  71     0,
  72     &DiskGeometry,
  73     sizeof(DISK_GEOMETRY));
  74   if (!NT_SUCCESS(Status))
  75     {
  76       DPRINT("IOCTL_DISK_GET_DRIVE_GEOMETRY failed with status 0x%.08x\n", Status);
  77       NtClose(FileHandle);
  78       return Status;
  79     }
  80
  81   if (DiskGeometry.MediaType == FixedMedia)
  82     {
  83       DPRINT("Cylinders %I64d\n", DiskGeometry.Cylinders.QuadPart);
  84       DPRINT("TracksPerCylinder %ld\n", DiskGeometry.TracksPerCylinder);
  85       DPRINT("SectorsPerTrack %ld\n", DiskGeometry.SectorsPerTrack);
  86       DPRINT("BytesPerSector %ld\n", DiskGeometry.BytesPerSector);
  87       DPRINT("DiskSize %I64d\n",
  88         DiskGeometry.Cylinders.QuadPart *
  89         (ULONGLONG)DiskGeometry.TracksPerCylinder *
  90         (ULONGLONG)DiskGeometry.SectorsPerTrack *
  91         (ULONGLONG)DiskGeometry.BytesPerSector);
  92
  93       Status = NtDeviceIoControlFile(FileHandle,
  94         NULL,
  95         NULL,
  96         NULL,
  97         &Iosb,
  98         IOCTL_DISK_GET_PARTITION_INFO,
  99         NULL,
 100         0,
 101         &PartitionInfo,
 102         sizeof(PARTITION_INFORMATION));
 103       if (!NT_SUCCESS(Status))
 104         {
 105           DPRINT("IOCTL_DISK_GET_PARTITION_INFO failed with status 0x%.08x\n", Status);
 106           NtClose(FileHandle);
 107           return Status;
 108         }
 109
 110       /*
 111        * FIXME: This is a hack!
 112        *        Partitioning software MUST set the correct number of hidden sectors!
 113        */
 114       PartitionInfo.HiddenSectors = DiskGeometry.SectorsPerTrack;
 115     }
 116   else
 117     {
 118       PartitionInfo.PartitionType = 0;
 119       PartitionInfo.StartingOffset.QuadPart = 0ULL;
 120       PartitionInfo.PartitionLength.QuadPart =
 121         DiskGeometry.Cylinders.QuadPart *
 122         (ULONGLONG)DiskGeometry.TracksPerCylinder *
 123         (ULONGLONG)DiskGeometry.SectorsPerTrack *
 124         (ULONGLONG)DiskGeometry.BytesPerSector;
 125       PartitionInfo.HiddenSectors = 0;
 126       PartitionInfo.PartitionNumber = 0;
 127       PartitionInfo.BootIndicator = FALSE;
 128       PartitionInfo.RewritePartition = FALSE;
 129       PartitionInfo.RecognizedPartition = FALSE;
 130     }
 131
 132   DPRINT("PartitionType 0x%x\n", PartitionInfo.PartitionType);
 133   DPRINT("StartingOffset %I64d\n", PartitionInfo.StartingOffset.QuadPart);
 134   DPRINT("PartitionLength %I64d\n", PartitionInfo.PartitionLength.QuadPart);
 135   DPRINT("HiddenSectors %lu\n", PartitionInfo.HiddenSectors);
 136   DPRINT("PartitionNumber %d\n", PartitionInfo.PartitionNumber);
 137   DPRINT("BootIndicator 0x%x\n", PartitionInfo.BootIndicator);
 138   DPRINT("RewritePartition %d\n", PartitionInfo.RewritePartition);
 139   DPRINT("RecognizedPartition %d\n", PartitionInfo.RecognizedPartition);
 140
 141   if (PartitionInfo.PartitionLength.QuadPart < (4200ULL * 1024ULL))
 142     {
 143       /* FAT12 (volume is smaller than 4.1MB) */
 144       Status = Fat12Format (FileHandle,
 145                             &PartitionInfo,
 146                             &DiskGeometry,
 147                             Label,
 148                             QuickFormat,
 149                             ClusterSize,
 150                             Callback);
 151     }
 152   else if (PartitionInfo.PartitionLength.QuadPart < (512ULL * 1024ULL * 1024ULL))
 153     {
 154       /* FAT16 (volume is smaller than 512MB) */
 155       Status = Fat16Format (FileHandle,
 156                             &PartitionInfo,
 157                             &DiskGeometry,
 158                             Label,
 159                             QuickFormat,
 160                             ClusterSize,
 161                             Callback);
 162     }
 163   else
 164     {
 165       /* FAT32 (volume is 512MB or larger) */
 166       Status = Fat32Format (FileHandle,
 167                             &PartitionInfo,
 168                             &DiskGeometry,
 169                             Label,
 170                             QuickFormat,
 171                             ClusterSize,
 172                             Callback);
 173     }
 174
 175   NtClose(FileHandle);
 176
 177   DPRINT("VfatFormat() done. Status 0x%.08x\n", Status);
 178
 179   return Status;
 180 }
 181
 182
 183 NTSTATUS
 184 VfatCleanup(VOID)
 185 {
 186   DPRINT("VfatCleanup()\n");
 187
 188   return STATUS_SUCCESS;
 189 }