volinfo.c File Reference

#include "npfs.h"

Include dependency graph for volinfo.c:

Go to the source code of this file.

Macros
#define	NPFS_BUGCHECK_FILE_ID   (NPFS_BUGCHECK_VOLINFO)

Functions
NTSTATUS NTAPI	NpQueryFsVolumeInfo (IN PVOID Buffer, IN OUT PULONG Length)
NTSTATUS NTAPI	NpQueryFsSizeInfo (IN PVOID Buffer, IN OUT PULONG Length)
NTSTATUS NTAPI	NpQueryFsDeviceInfo (IN PVOID Buffer, IN OUT PULONG Length)
NTSTATUS NTAPI	NpQueryFsAttributeInfo (IN PVOID Buffer, IN OUT PULONG Length)
NTSTATUS NTAPI	NpQueryFsFullSizeInfo (IN PVOID Buffer, IN OUT PULONG Length)
NTSTATUS NTAPI	NpCommonQueryVolumeInformation (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
NTSTATUS NTAPI	NpFsdQueryVolumeInformation (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)

Macro Definition Documentation

NPFS_BUGCHECK_FILE_ID

#define NPFS_BUGCHECK_FILE_ID   (NPFS_BUGCHECK_VOLINFO)

Definition at line 14 of file volinfo.c.

Function Documentation

NpCommonQueryVolumeInformation()

NTSTATUS NTAPI NpCommonQueryVolumeInformation	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp
	)

Definition at line 134 of file volinfo.c.

{
    PIO_STACK_LOCATION IoStack;
    FS_INFORMATION_CLASS InfoClass;
    ULONG Length;
    PVOID Buffer;
    NTSTATUS Status;
    PAGED_CODE();
    TRACE("Entered\n");

    IoStack = IoGetCurrentIrpStackLocation(Irp);
    Buffer = Irp->AssociatedIrp.SystemBuffer;
    Length = IoStack->Parameters.QueryVolume.Length;
    InfoClass = IoStack->Parameters.QueryVolume.FsInformationClass;

    RtlZeroMemory(Buffer, Length);

    switch (InfoClass)
    {
        case FileFsVolumeInformation:
            Status = NpQueryFsVolumeInfo(Buffer, &Length);
            break;
        case FileFsSizeInformation:
            Status = NpQueryFsSizeInfo(Buffer, &Length);
            break;
        case FileFsDeviceInformation:
            Status = NpQueryFsDeviceInfo(Buffer, &Length);
            break;
        case FileFsAttributeInformation:
            Status = NpQueryFsAttributeInfo(Buffer, &Length);
            break;
        case FileFsFullSizeInformation:
            Status = NpQueryFsFullSizeInfo(Buffer, &Length);
            break;
        default:
            Status = STATUS_NOT_SUPPORTED;
            break;
    }

    Irp->IoStatus.Information = IoStack->Parameters.QueryVolume.Length - Length;
    TRACE("Leaving, Status = %lx\n", Status);
    return Status;
}

Referenced by NpFsdQueryVolumeInformation().

NpFsdQueryVolumeInformation()

NTSTATUS NTAPI NpFsdQueryVolumeInformation	(	IN PDEVICE_OBJECT	DeviceObject,
		IN PIRP	Irp
	)

Definition at line 181 of file volinfo.c.

{
    NTSTATUS Status;
    PAGED_CODE();
    TRACE("Entered\n");

    FsRtlEnterFileSystem();
    NpAcquireSharedVcb();

    Status = NpCommonQueryVolumeInformation(DeviceObject, Irp);

    NpReleaseVcb();
    FsRtlExitFileSystem();

    if (Status != STATUS_PENDING)
    {
        Irp->IoStatus.Status = Status;
        IoCompleteRequest(Irp, IO_NAMED_PIPE_INCREMENT);
    }

    TRACE("Leaving, Status = %lx\n", Status);
    return Status;
}

Referenced by DriverEntry().

NpQueryFsAttributeInfo()

NTSTATUS NTAPI NpQueryFsAttributeInfo	(	IN PVOID	Buffer,
		IN OUT PULONG	Length
	)

Definition at line 86 of file volinfo.c.

{
    PFILE_FS_ATTRIBUTE_INFORMATION InfoBuffer = Buffer;
    NTSTATUS Status;
    USHORT NameLength;
    TRACE("Entered\n");

    NameLength = (USHORT)(*Length - 12);
    if (NameLength < 8)
    {
        *Length = 0;
        Status = STATUS_BUFFER_OVERFLOW;
    }
    else
    {
        *Length -= 20;
        NameLength = 8;
        Status = STATUS_SUCCESS;
    }

    InfoBuffer->MaximumComponentNameLength = 0xFFFFFFFF;
    InfoBuffer->FileSystemNameLength = 8;
    InfoBuffer->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES;
    RtlCopyMemory(InfoBuffer->FileSystemName, L"NPFS", NameLength);

    TRACE("Leaving, Status = %lx\n", Status);
    return Status;
}

Referenced by NpCommonQueryVolumeInformation().

NpQueryFsDeviceInfo()

NTSTATUS NTAPI NpQueryFsDeviceInfo	(	IN PVOID	Buffer,
		IN OUT PULONG	Length
	)

Definition at line 71 of file volinfo.c.

{
    PFILE_FS_DEVICE_INFORMATION InfoBuffer = Buffer;
    TRACE("Entered\n");

    InfoBuffer->DeviceType = FILE_DEVICE_NAMED_PIPE;
    *Length -= sizeof(*InfoBuffer);

    TRACE("Leaving, Status = STATUS_SUCCESS\n");
    return STATUS_SUCCESS;
}

Referenced by NpCommonQueryVolumeInformation().

NpQueryFsFullSizeInfo()

NTSTATUS NTAPI NpQueryFsFullSizeInfo	(	IN PVOID	Buffer,
		IN OUT PULONG	Length
	)

Definition at line 118 of file volinfo.c.

{
    PFILE_FS_FULL_SIZE_INFORMATION InfoBuffer = Buffer;
    TRACE("Entered\n");

    *Length -= sizeof(*InfoBuffer);

    RtlZeroMemory(InfoBuffer, sizeof(*InfoBuffer));

    TRACE("Leaving, Status = STATUS_SUCCESS\n");
    return STATUS_SUCCESS;
}

Referenced by NpCommonQueryVolumeInformation().

NpQueryFsSizeInfo()

NTSTATUS NTAPI NpQueryFsSizeInfo	(	IN PVOID	Buffer,
		IN OUT PULONG	Length
	)

Definition at line 54 of file volinfo.c.

{
    PFILE_FS_SIZE_INFORMATION InfoBuffer = Buffer;
    TRACE("Entered\n");

    *Length -= sizeof(*InfoBuffer);

    InfoBuffer->SectorsPerAllocationUnit = 1;
    InfoBuffer->BytesPerSector = 1;

    TRACE("Leaving, Status = STATUS_SUCCESS\n");
    return STATUS_SUCCESS;
}

Referenced by NpCommonQueryVolumeInformation().

NpQueryFsVolumeInfo()

NTSTATUS NTAPI NpQueryFsVolumeInfo	(	IN PVOID	Buffer,
		IN OUT PULONG	Length
	)

Definition at line 20 of file volinfo.c.

{
    PFILE_FS_VOLUME_INFORMATION InfoBuffer = Buffer;
    NTSTATUS Status;
    USHORT NameLength;
    TRACE("Entered\n");

    *Length -= FIELD_OFFSET(FILE_FS_VOLUME_INFORMATION, VolumeLabel);

    InfoBuffer->SupportsObjects = 0;

    NameLength = 18;
    InfoBuffer->VolumeLabelLength = 18;

    if (*Length < 18)
    {
        NameLength = (USHORT)*Length;
        Status = STATUS_BUFFER_OVERFLOW;
    }
    else
    {
        Status = STATUS_SUCCESS;
    }

    RtlCopyMemory(InfoBuffer->VolumeLabel, L"NamedPipe", NameLength);
    *Length -= NameLength;

    TRACE("Leaving, Status = %lx\n", Status);
    return Status;
}

Referenced by NpCommonQueryVolumeInformation().