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Definition at line 22 of file vfatlib.c. Referenced by InstallFatBootcodeToFloppy(), and NATIVE_CreateFileSystemList(). {
OBJECT_ATTRIBUTES ObjectAttributes;
DISK_GEOMETRY DiskGeometry;
IO_STATUS_BLOCK Iosb;
HANDLE FileHandle;
PARTITION_INFORMATION PartitionInfo;
FORMAT_CONTEXT Context;
NTSTATUS Status, LockStatus;
DPRINT("VfatFormat(DriveRoot '%wZ')\n", DriveRoot);
Context.TotalSectorCount = 0;
Context.CurrentSectorCount = 0;
Context.Callback = Callback;
Context.Success = FALSE;
Context.Percent = 0;
InitializeObjectAttributes(&ObjectAttributes,
DriveRoot,
0,
NULL,
NULL);
Status = NtOpenFile(&FileHandle,
FILE_GENERIC_READ | FILE_GENERIC_WRITE,
&ObjectAttributes,
&Iosb,
FILE_SHARE_READ,
FILE_SYNCHRONOUS_IO_ALERT);
if (!NT_SUCCESS(Status))
{
DPRINT1("NtOpenFile() failed with status 0x%.08x\n", Status);
return Status;
}
Status = NtDeviceIoControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
IOCTL_DISK_GET_DRIVE_GEOMETRY,
NULL,
0,
&DiskGeometry,
sizeof(DISK_GEOMETRY));
if (!NT_SUCCESS(Status))
{
DPRINT("IOCTL_DISK_GET_DRIVE_GEOMETRY failed with status 0x%.08x\n", Status);
NtClose(FileHandle);
return Status;
}
if (DiskGeometry.MediaType == FixedMedia)
{
DPRINT("Cylinders %I64d\n", DiskGeometry.Cylinders.QuadPart);
DPRINT("TracksPerCylinder %ld\n", DiskGeometry.TracksPerCylinder);
DPRINT("SectorsPerTrack %ld\n", DiskGeometry.SectorsPerTrack);
DPRINT("BytesPerSector %ld\n", DiskGeometry.BytesPerSector);
DPRINT("DiskSize %I64d\n",
DiskGeometry.Cylinders.QuadPart *
(ULONGLONG)DiskGeometry.TracksPerCylinder *
(ULONGLONG)DiskGeometry.SectorsPerTrack *
(ULONGLONG)DiskGeometry.BytesPerSector);
Status = NtDeviceIoControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
IOCTL_DISK_GET_PARTITION_INFO,
NULL,
0,
&PartitionInfo,
sizeof(PARTITION_INFORMATION));
if (!NT_SUCCESS(Status))
{
DPRINT("IOCTL_DISK_GET_PARTITION_INFO failed with status 0x%.08x\n", Status);
NtClose(FileHandle);
return Status;
}
/*
* FIXME: This is a hack!
* Partitioning software MUST set the correct number of hidden sectors!
*/
PartitionInfo.HiddenSectors = DiskGeometry.SectorsPerTrack;
}
else
{
PartitionInfo.PartitionType = 0;
PartitionInfo.StartingOffset.QuadPart = 0ULL;
PartitionInfo.PartitionLength.QuadPart =
DiskGeometry.Cylinders.QuadPart *
(ULONGLONG)DiskGeometry.TracksPerCylinder *
(ULONGLONG)DiskGeometry.SectorsPerTrack *
(ULONGLONG)DiskGeometry.BytesPerSector;
PartitionInfo.HiddenSectors = 0;
PartitionInfo.PartitionNumber = 0;
PartitionInfo.BootIndicator = FALSE;
PartitionInfo.RewritePartition = FALSE;
PartitionInfo.RecognizedPartition = FALSE;
}
/* If it already has a FAT FS, we'll use that type.
* If it doesn't, we will determine the FAT type based on size and offset */
if (PartitionInfo.PartitionType != PARTITION_FAT_12 &&
PartitionInfo.PartitionType != PARTITION_FAT_16 &&
PartitionInfo.PartitionType != PARTITION_HUGE &&
PartitionInfo.PartitionType != PARTITION_XINT13 &&
PartitionInfo.PartitionType != PARTITION_FAT32 &&
PartitionInfo.PartitionType != PARTITION_FAT32_XINT13)
{
/* Determine the correct type based upon size and offset (copied from usetup) */
if (PartitionInfo.PartitionLength.QuadPart < (4200LL * 1024LL))
{
/* FAT12 CHS partition (disk is smaller than 4.1MB) */
PartitionInfo.PartitionType = PARTITION_FAT_12;
}
else if (PartitionInfo.StartingOffset.QuadPart < (1024LL * 255LL * 63LL * 512LL))
{
/* Partition starts below the 8.4GB boundary ==> CHS partition */
if (PartitionInfo.PartitionLength.QuadPart < (32LL * 1024LL * 1024LL))
{
/* FAT16 CHS partition (partiton size < 32MB) */
PartitionInfo.PartitionType = PARTITION_FAT_16;
}
else if (PartitionInfo.PartitionLength.QuadPart < (512LL * 1024LL * 1024LL))
{
/* FAT16 CHS partition (partition size < 512MB) */
PartitionInfo.PartitionType = PARTITION_HUGE;
}
else
{
/* FAT32 CHS partition (partition size >= 512MB) */
PartitionInfo.PartitionType = PARTITION_FAT32;
}
}
else
{
/* Partition starts above the 8.4GB boundary ==> LBA partition */
if (PartitionInfo.PartitionLength.QuadPart < (512LL * 1024LL * 1024LL))
{
/* FAT16 LBA partition (partition size < 512MB) */
PartitionInfo.PartitionType = PARTITION_XINT13;
}
else
{
/* FAT32 LBA partition (partition size >= 512MB) */
PartitionInfo.PartitionType = PARTITION_FAT32_XINT13;
}
}
}
DPRINT("PartitionType 0x%x\n", PartitionInfo.PartitionType);
DPRINT("StartingOffset %I64d\n", PartitionInfo.StartingOffset.QuadPart);
DPRINT("PartitionLength %I64d\n", PartitionInfo.PartitionLength.QuadPart);
DPRINT("HiddenSectors %lu\n", PartitionInfo.HiddenSectors);
DPRINT("PartitionNumber %d\n", PartitionInfo.PartitionNumber);
DPRINT("BootIndicator 0x%x\n", PartitionInfo.BootIndicator);
DPRINT("RewritePartition %d\n", PartitionInfo.RewritePartition);
DPRINT("RecognizedPartition %d\n", PartitionInfo.RecognizedPartition);
if (Callback != NULL)
{
Context.Percent = 0;
Callback (PROGRESS, 0, (PVOID)&Context.Percent);
}
LockStatus = NtFsControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
FSCTL_LOCK_VOLUME,
NULL,
0,
NULL,
0);
if (!NT_SUCCESS(LockStatus))
{
DPRINT1("WARNING: Failed to lock volume for formatting! Format may fail! (Status: 0x%x)\n", LockStatus);
}
if (PartitionInfo.PartitionType == PARTITION_FAT_12)
{
/* FAT12 */
Status = Fat12Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else if (PartitionInfo.PartitionType == PARTITION_FAT_16 ||
PartitionInfo.PartitionType == PARTITION_HUGE ||
PartitionInfo.PartitionType == PARTITION_XINT13)
{
/* FAT16 */
Status = Fat16Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else if (PartitionInfo.PartitionType == PARTITION_FAT32 ||
PartitionInfo.PartitionType == PARTITION_FAT32_XINT13)
{
/* FAT32 */
Status = Fat32Format(FileHandle,
&PartitionInfo,
&DiskGeometry,
Label,
QuickFormat,
ClusterSize,
&Context);
}
else
{
Status = STATUS_INVALID_PARAMETER;
}
LockStatus = NtFsControlFile(FileHandle,
NULL,
NULL,
NULL,
&Iosb,
FSCTL_UNLOCK_VOLUME,
NULL,
0,
NULL,
0);
if (!NT_SUCCESS(LockStatus))
{
DPRINT1("Failed to unlock volume (Status: 0x%x)\n", LockStatus);
}
NtClose(FileHandle);
if (Callback != NULL)
{
Context.Success = (BOOLEAN)(NT_SUCCESS(Status));
Callback (DONE, 0, (PVOID)&Context.Success);
}
DPRINT("VfatFormat() done. Status 0x%.08x\n", Status);
return Status;
}
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