mirror of
https://github.com/reactos/reactos.git
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120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/fs/npfs/volume.c
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* PURPOSE: Named pipe filesystem
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* PROGRAMMER: Eric Kohl
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*/
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/* INCLUDES *****************************************************************/
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#include "npfs.h"
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ****************************************************************/
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static NTSTATUS
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NpfsQueryFsDeviceInformation(PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
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PULONG BufferLength)
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{
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DPRINT("NpfsQueryFsDeviceInformation()\n");
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DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
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if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
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{
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*BufferLength = sizeof(FILE_FS_DEVICE_INFORMATION);
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return STATUS_BUFFER_OVERFLOW;
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}
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FsDeviceInfo->DeviceType = FILE_DEVICE_NAMED_PIPE;
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FsDeviceInfo->Characteristics = 0;
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*BufferLength = sizeof(FILE_FS_DEVICE_INFORMATION);
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DPRINT("NpfsQueryFsDeviceInformation() finished.\n");
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return STATUS_SUCCESS;
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}
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static NTSTATUS
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NpfsQueryFsAttributeInformation(PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
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PULONG BufferLength)
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{
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DPRINT("NpfsQueryFsAttributeInformation() called.\n");
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DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
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if (*BufferLength < sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8)
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{
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*BufferLength = (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
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return STATUS_BUFFER_OVERFLOW;
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}
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FsAttributeInfo->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES;
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FsAttributeInfo->MaximumComponentNameLength = 255;
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FsAttributeInfo->FileSystemNameLength = 8;
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wcscpy(FsAttributeInfo->FileSystemName,
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L"NPFS");
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DPRINT("NpfsQueryFsAttributeInformation() finished.\n");
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*BufferLength = (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
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return STATUS_SUCCESS;
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}
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NTSTATUS NTAPI
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NpfsQueryVolumeInformation(PDEVICE_OBJECT DeviceObject,
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PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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FS_INFORMATION_CLASS FsInformationClass;
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NTSTATUS Status = STATUS_SUCCESS;
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PVOID SystemBuffer;
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ULONG BufferLength;
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/* PRECONDITION */
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ASSERT(DeviceObject != NULL);
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ASSERT(Irp != NULL);
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DPRINT("NpfsQueryVolumeInformation(DeviceObject %p, Irp %p)\n",
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DeviceObject,
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Irp);
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Stack = IoGetCurrentIrpStackLocation(Irp);
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FsInformationClass = Stack->Parameters.QueryVolume.FsInformationClass;
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BufferLength = Stack->Parameters.QueryVolume.Length;
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SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
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DPRINT("FsInformationClass %d\n", FsInformationClass);
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DPRINT("SystemBuffer %p\n", SystemBuffer);
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switch (FsInformationClass)
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{
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case FileFsDeviceInformation:
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Status = NpfsQueryFsDeviceInformation(SystemBuffer,
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&BufferLength);
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break;
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case FileFsAttributeInformation:
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Status = NpfsQueryFsAttributeInformation(SystemBuffer,
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&BufferLength);
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break;
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default:
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Status = STATUS_NOT_SUPPORTED;
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}
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Irp->IoStatus.Status = Status;
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Irp->IoStatus.Information = BufferLength;
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IoCompleteRequest(Irp,
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IO_NO_INCREMENT);
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return Status;
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}
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/* EOF */
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