mirror of
https://github.com/reactos/reactos.git
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211 lines
5.2 KiB
C
211 lines
5.2 KiB
C
/*
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* PROJECT: ReactOS Named Pipe FileSystem
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: drivers/filesystems/npfs/volinfo.c
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* PURPOSE: Named Pipe FileSystem Volume Information
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include "npfs.h"
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// File ID number for NPFS bugchecking support
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#define NPFS_BUGCHECK_FILE_ID (NPFS_BUGCHECK_VOLINFO)
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/* FUNCTIONS ******************************************************************/
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NTSTATUS
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NTAPI
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NpQueryFsVolumeInfo(IN PVOID Buffer,
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IN OUT PULONG Length)
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{
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PFILE_FS_VOLUME_INFORMATION InfoBuffer = Buffer;
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NTSTATUS Status;
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USHORT NameLength;
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TRACE("Entered\n");
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*Length -= FIELD_OFFSET(FILE_FS_VOLUME_INFORMATION, VolumeLabel);
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InfoBuffer->VolumeCreationTime.QuadPart = 0;
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InfoBuffer->VolumeSerialNumber = 0;
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InfoBuffer->SupportsObjects = 0;
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NameLength = 18;
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InfoBuffer->VolumeLabelLength = 18;
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if (*Length < 18)
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{
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NameLength = (USHORT)*Length;
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Status = STATUS_BUFFER_OVERFLOW;
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}
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else
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{
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Status = STATUS_SUCCESS;
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}
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RtlCopyMemory(InfoBuffer->VolumeLabel, L"NamedPipe", NameLength);
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*Length -= NameLength;
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TRACE("Leaving, Status = %lx\n", Status);
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return Status;
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}
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NTSTATUS
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NTAPI
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NpQueryFsSizeInfo(IN PVOID Buffer,
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IN OUT PULONG Length)
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{
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PFILE_FS_SIZE_INFORMATION InfoBuffer = Buffer;
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TRACE("Entered\n");
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*Length -= sizeof(*InfoBuffer);
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InfoBuffer->TotalAllocationUnits.QuadPart = 0;
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InfoBuffer->AvailableAllocationUnits.QuadPart = 0;
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InfoBuffer->SectorsPerAllocationUnit = 1;
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InfoBuffer->BytesPerSector = 1;
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TRACE("Leaving, Status = STATUS_SUCCESS\n");
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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NpQueryFsDeviceInfo(IN PVOID Buffer,
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IN OUT PULONG Length)
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{
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PFILE_FS_DEVICE_INFORMATION InfoBuffer = Buffer;
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TRACE("Entered\n");
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InfoBuffer->DeviceType = 0;
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InfoBuffer->Characteristics = 0;
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InfoBuffer->DeviceType = FILE_DEVICE_NAMED_PIPE;
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*Length -= sizeof(*InfoBuffer);
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TRACE("Leaving, Status = STATUS_SUCCESS\n");
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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NpQueryFsAttributeInfo(IN PVOID Buffer,
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IN OUT PULONG Length)
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{
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PFILE_FS_ATTRIBUTE_INFORMATION InfoBuffer = Buffer;
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NTSTATUS Status;
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USHORT NameLength;
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TRACE("Entered\n");
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NameLength = (USHORT)(*Length - 12);
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if (NameLength < 8)
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{
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*Length = 0;
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Status = STATUS_BUFFER_OVERFLOW;
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}
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else
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{
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*Length -= 20;
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NameLength = 8;
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Status = STATUS_SUCCESS;
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}
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InfoBuffer->MaximumComponentNameLength = 0xFFFFFFFF;
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InfoBuffer->FileSystemNameLength = 8;
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InfoBuffer->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES;
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RtlCopyMemory(InfoBuffer->FileSystemName, L"NPFS", NameLength);
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TRACE("Leaving, Status = %lx\n", Status);
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return Status;
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}
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NTSTATUS
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NTAPI
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NpQueryFsFullSizeInfo(IN PVOID Buffer,
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IN OUT PULONG Length)
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{
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PFILE_FS_FULL_SIZE_INFORMATION InfoBuffer = Buffer;
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TRACE("Entered\n");
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*Length -= sizeof(*InfoBuffer);
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RtlZeroMemory(InfoBuffer, sizeof(*InfoBuffer));
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TRACE("Leaving, Status = STATUS_SUCCESS\n");
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return STATUS_SUCCESS;
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}
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NTSTATUS
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NTAPI
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NpCommonQueryVolumeInformation(IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PIO_STACK_LOCATION IoStack;
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FS_INFORMATION_CLASS InfoClass;
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ULONG Length;
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PVOID Buffer;
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NTSTATUS Status;
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PAGED_CODE();
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TRACE("Entered\n");
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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Buffer = Irp->AssociatedIrp.SystemBuffer;
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Length = IoStack->Parameters.QueryVolume.Length;
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InfoClass = IoStack->Parameters.QueryVolume.FsInformationClass;
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switch (InfoClass)
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{
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case FileFsVolumeInformation:
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Status = NpQueryFsVolumeInfo(Buffer, &Length);
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break;
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case FileFsSizeInformation:
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Status = NpQueryFsSizeInfo(Buffer, &Length);
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break;
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case FileFsDeviceInformation:
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Status = NpQueryFsDeviceInfo(Buffer, &Length);
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break;
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case FileFsAttributeInformation:
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Status = NpQueryFsAttributeInfo(Buffer, &Length);
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break;
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case FileFsFullSizeInformation:
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Status = NpQueryFsFullSizeInfo(Buffer, &Length);
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break;
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default:
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Status = STATUS_NOT_SUPPORTED;
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break;
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}
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Irp->IoStatus.Information = IoStack->Parameters.QueryVolume.Length - Length;
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TRACE("Leaving, Status = %lx\n", Status);
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return Status;
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}
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NTSTATUS
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NTAPI
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NpFsdQueryVolumeInformation(IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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NTSTATUS Status;
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PAGED_CODE();
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TRACE("Entered\n");
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FsRtlEnterFileSystem();
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NpAcquireSharedVcb();
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Status = NpCommonQueryVolumeInformation(DeviceObject, Irp);
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NpReleaseVcb();
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FsRtlExitFileSystem();
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if (Status != STATUS_PENDING)
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{
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Irp->IoStatus.Status = Status;
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IoCompleteRequest(Irp, IO_NAMED_PIPE_INCREMENT);
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}
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TRACE("Leaving, Status = %lx\n", Status);
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return Status;
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}
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/* EOF */
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