mirror of
https://github.com/reactos/reactos.git
synced 2024-08-29 22:58:34 +00:00
110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/*
|
|
* PROJECT: Filesystem Filter Manager
|
|
* LICENSE: GPL - See COPYING in the top level directory
|
|
* FILE: drivers/filters/fltmgr/Context.c
|
|
* PURPOSE: Contains routines for the volume
|
|
* PROGRAMMERS: Ged Murphy (gedmurphy@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include "fltmgr.h"
|
|
#include "fltmgrint.h"
|
|
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
|
|
/* DATA *********************************************************************/
|
|
|
|
|
|
|
|
/* EXPORTED FUNCTIONS ******************************************************/
|
|
|
|
NTSTATUS
|
|
FLTAPI
|
|
FltGetVolumeProperties(
|
|
_In_ PFLT_VOLUME Volume,
|
|
_Out_writes_bytes_to_opt_(VolumePropertiesLength, *LengthReturned) PFLT_VOLUME_PROPERTIES VolumeProperties,
|
|
_In_ ULONG VolumePropertiesLength,
|
|
_Out_ PULONG LengthReturned
|
|
)
|
|
{
|
|
ULONG BufferRequired;
|
|
ULONG BytesWritten;
|
|
PCHAR Ptr;
|
|
NTSTATUS Status;
|
|
|
|
/* Calculate the required buffer size */
|
|
BufferRequired = sizeof(FLT_VOLUME_PROPERTIES) +
|
|
Volume->CDODriverName.Length +
|
|
Volume->DeviceName.Length +
|
|
Volume->CDODeviceName.Length;
|
|
|
|
/* If we don't have enough buffer to fill in the fixed struct, return with the required size */
|
|
if (VolumePropertiesLength < sizeof(FLT_VOLUME_PROPERTIES))
|
|
{
|
|
*LengthReturned = BufferRequired;
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
/* Clear out the buffer */
|
|
RtlZeroMemory(VolumeProperties, sizeof(FLT_VOLUME_PROPERTIES));
|
|
|
|
/* Fill in the fixed data */
|
|
VolumeProperties->DeviceType = Volume->DeviceObject->DeviceType;
|
|
VolumeProperties->DeviceObjectFlags = Volume->DeviceObject->Flags;
|
|
VolumeProperties->AlignmentRequirement = Volume->DeviceObject->AlignmentRequirement;
|
|
VolumeProperties->SectorSize = Volume->DeviceObject->SectorSize;
|
|
if (Volume->DiskDeviceObject)
|
|
{
|
|
VolumeProperties->DeviceCharacteristics = Volume->DiskDeviceObject->Characteristics;
|
|
}
|
|
else
|
|
{
|
|
VolumeProperties->DeviceCharacteristics = Volume->DeviceObject->Characteristics;
|
|
}
|
|
|
|
/* So far we've written the fixed struct data */
|
|
BytesWritten = sizeof(FLT_VOLUME_PROPERTIES);
|
|
Ptr = (PCHAR)(VolumeProperties + 1);
|
|
|
|
/* Make sure we have enough room to add the dynamic data */
|
|
if (VolumePropertiesLength >= BufferRequired)
|
|
{
|
|
/* Add the FS device name */
|
|
VolumeProperties->FileSystemDeviceName.Length = 0;
|
|
VolumeProperties->FileSystemDeviceName.MaximumLength = Volume->CDODeviceName.Length;
|
|
VolumeProperties->FileSystemDeviceName.Buffer = (PWCH)Ptr;
|
|
RtlCopyUnicodeString(&VolumeProperties->FileSystemDeviceName, &Volume->CDODeviceName);
|
|
Ptr += VolumeProperties->FileSystemDeviceName.Length;
|
|
|
|
/* Add the driver name */
|
|
VolumeProperties->FileSystemDriverName.Length = 0;
|
|
VolumeProperties->FileSystemDriverName.MaximumLength = Volume->CDODriverName.Length;
|
|
VolumeProperties->FileSystemDriverName.Buffer = (PWCH)Ptr;
|
|
RtlCopyUnicodeString(&VolumeProperties->FileSystemDriverName, &Volume->CDODriverName);
|
|
Ptr += VolumeProperties->FileSystemDriverName.Length;
|
|
|
|
/* Add the volume name */
|
|
VolumeProperties->RealDeviceName.Length = 0;
|
|
VolumeProperties->RealDeviceName.MaximumLength = Volume->DeviceName.Length;
|
|
VolumeProperties->RealDeviceName.Buffer = (PWCH)Ptr;
|
|
RtlCopyUnicodeString(&VolumeProperties->RealDeviceName, &Volume->DeviceName);
|
|
|
|
BytesWritten = BufferRequired;
|
|
|
|
Status = STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
Status = STATUS_BUFFER_OVERFLOW;
|
|
}
|
|
|
|
/* Set the number of bytes we wrote and return */
|
|
*LengthReturned = BytesWritten;
|
|
return Status;
|
|
}
|
|
|
|
|
|
/* INTERNAL FUNCTIONS ******************************************************/ |