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Windows Driver: make IOCTL_DISK_GET_DRIVE_GEOMETRY_EX support optional. Make disk size equal to partition size to avoid compatibility issues with existing software.

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This commit is contained in:
Mounir IDRASSI 2017-07-23 10:39:03 +02:00
parent 1812449906
commit 7cc2a3527d
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GPG Key ID: DD0C382D5FCFB8FC
2 changed files with 20 additions and 17 deletions
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34
src/Driver/Ntdriver.c
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@ -731,21 +731,25 @@ NTSTATUS ProcessVolumeDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION
case IOCTL_DISK_GET_DRIVE_GEOMETRY_EX:
Dump ("ProcessVolumeDeviceControlIrp (IOCTL_DISK_GET_DRIVE_GEOMETRY_EX)\n");
/* Return the drive geometry for the disk and its size.*/
if (ValidateIOBufferSize (Irp, sizeof (DISK_GEOMETRY_EX), ValidateOutput))
Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
Irp->IoStatus.Information = 0;
if (EnableExtendedIoctlSupport)
{
PDISK_GEOMETRY_EX outputBuffer = (PDISK_GEOMETRY_EX)
Irp->AssociatedIrp.SystemBuffer;
/* Return the drive geometry for the disk and its size.*/
if (ValidateIOBufferSize (Irp, sizeof (DISK_GEOMETRY_EX), ValidateOutput))
{
PDISK_GEOMETRY_EX outputBuffer = (PDISK_GEOMETRY_EX)
Irp->AssociatedIrp.SystemBuffer;
outputBuffer->Geometry.MediaType = Extension->bRemovable ? RemovableMedia : FixedMedia;
outputBuffer->Geometry.Cylinders.QuadPart = Extension->NumberOfCylinders;
outputBuffer->Geometry.TracksPerCylinder = Extension->TracksPerCylinder;
outputBuffer->Geometry.SectorsPerTrack = Extension->SectorsPerTrack;
outputBuffer->Geometry.BytesPerSector = Extension->BytesPerSector;
/* add one sector to DiskLength since our partition size is DiskLength and its offset if BytesPerSector */
outputBuffer->DiskSize.QuadPart = Extension->DiskLength + Extension->BytesPerSector;
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = sizeof (DISK_GEOMETRY_EX);
outputBuffer->Geometry.MediaType = Extension->bRemovable ? RemovableMedia : FixedMedia;
outputBuffer->Geometry.Cylinders.QuadPart = Extension->NumberOfCylinders;
outputBuffer->Geometry.TracksPerCylinder = Extension->TracksPerCylinder;
outputBuffer->Geometry.SectorsPerTrack = Extension->SectorsPerTrack;
outputBuffer->Geometry.BytesPerSector = Extension->BytesPerSector;
outputBuffer->DiskSize.QuadPart = Extension->DiskLength;
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = sizeof (DISK_GEOMETRY_EX);
}
}
break;
@ -1162,8 +1166,8 @@ NTSTATUS ProcessVolumeDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION
capacity->Version = sizeof (STORAGE_READ_CAPACITY);
capacity->Size = sizeof (STORAGE_READ_CAPACITY);
capacity->BlockLength = Extension->BytesPerSector;
capacity->NumberOfBlocks.QuadPart = (Extension->DiskLength / Extension->BytesPerSector) + 1;
capacity->DiskLength.QuadPart = Extension->DiskLength + Extension->BytesPerSector;
capacity->NumberOfBlocks.QuadPart = Extension->DiskLength / Extension->BytesPerSector;
capacity->DiskLength.QuadPart = Extension->DiskLength;
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = sizeof (STORAGE_READ_CAPACITY);

3
src/Driver/Ntvol.c
View File

@ -704,8 +704,7 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
Extension->TracksPerCylinder = 1;
Extension->SectorsPerTrack = 1;
Extension->BytesPerSector = Extension->cryptoInfo->SectorSize;
// Add extra sector since our virtual partition starts at Extension->BytesPerSector and not 0
Extension->NumberOfCylinders = (Extension->DiskLength / Extension->BytesPerSector) + 1;
Extension->NumberOfCylinders = Extension->DiskLength / Extension->BytesPerSector;
Extension->PartitionType = 0;
Extension->bRawDevice = bRawDevice;