volinfo.c

Go to the documentation of this file.

/*
*  ReactOS kernel
*  Copyright (C) 2002, 2003 ReactOS Team
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  You should have received a copy of the GNU General Public License along
*  with this program; if not, write to the Free Software Foundation, Inc.,
*  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* $Id: volinfo.c 44442 2009-12-06 18:49:19Z spetreolle $
*
* COPYRIGHT:        See COPYING in the top level directory
* PROJECT:          ReactOS kernel
* FILE:             services/fs/vfat/volume.c
* PURPOSE:          CDROM (ISO 9660) filesystem driver
* PROGRAMMER:       Art Yerkes
*                   Eric Kohl
*/

/* INCLUDES *****************************************************************/

#include "cdfs.h"

#define NDEBUG
#include <debug.h>

/* FUNCTIONS ****************************************************************/

static NTSTATUS
CdfsGetFsVolumeInformation(PDEVICE_OBJECT DeviceObject,
                           PFILE_FS_VOLUME_INFORMATION FsVolumeInfo,
                           PULONG BufferLength)
{
    DPRINT("CdfsGetFsVolumeInformation() called\n");
    DPRINT("FsVolumeInfo = %p\n", FsVolumeInfo);
    DPRINT("BufferLength %lu\n", *BufferLength);

    DPRINT("Vpb %p\n", DeviceObject->Vpb);

    DPRINT("Required length %lu\n", (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength));
    DPRINT("LabelLength %hu\n", DeviceObject->Vpb->VolumeLabelLength);
    DPRINT("Label %*.S\n", DeviceObject->Vpb->VolumeLabelLength / sizeof(WCHAR), DeviceObject->Vpb->VolumeLabel);

    if (*BufferLength < sizeof(FILE_FS_VOLUME_INFORMATION))
        return STATUS_INFO_LENGTH_MISMATCH;

    if (*BufferLength < (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength))
        return STATUS_BUFFER_OVERFLOW;

    /* valid entries */
    FsVolumeInfo->VolumeSerialNumber = DeviceObject->Vpb->SerialNumber;
    FsVolumeInfo->VolumeLabelLength = DeviceObject->Vpb->VolumeLabelLength;
    memcpy(FsVolumeInfo->VolumeLabel,
        DeviceObject->Vpb->VolumeLabel,
        DeviceObject->Vpb->VolumeLabelLength);

    /* dummy entries */
    FsVolumeInfo->VolumeCreationTime.QuadPart = 0;
    FsVolumeInfo->SupportsObjects = FALSE;

    DPRINT("Finished FsdGetFsVolumeInformation()\n");

    *BufferLength -= (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength);

    DPRINT("BufferLength %lu\n", *BufferLength);

    return(STATUS_SUCCESS);
}


static NTSTATUS
CdfsGetFsAttributeInformation(PDEVICE_EXTENSION DeviceExt,
                              PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
                              PULONG BufferLength)
{
    DPRINT("CdfsGetFsAttributeInformation()\n");
    DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
    DPRINT("BufferLength %lu\n", *BufferLength);
    DPRINT("Required length %lu\n", (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8));

    if (*BufferLength < sizeof (FILE_FS_ATTRIBUTE_INFORMATION))
        return STATUS_INFO_LENGTH_MISMATCH;

    if (*BufferLength < (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8))
        return STATUS_BUFFER_OVERFLOW;

    FsAttributeInfo->FileSystemAttributes =
        FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK;
    FsAttributeInfo->MaximumComponentNameLength = 255;
    FsAttributeInfo->FileSystemNameLength = 8;

    memcpy(FsAttributeInfo->FileSystemName, L"CDFS", 8);

    DPRINT("Finished FsdGetFsAttributeInformation()\n");

    *BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
    DPRINT("BufferLength %lu\n", *BufferLength);

    return(STATUS_SUCCESS);
}


static NTSTATUS
CdfsGetFsSizeInformation(PDEVICE_OBJECT DeviceObject,
                         PFILE_FS_SIZE_INFORMATION FsSizeInfo,
                         PULONG BufferLength)
{
    PDEVICE_EXTENSION DeviceExt;
    NTSTATUS Status = STATUS_SUCCESS;

    DPRINT("CdfsGetFsSizeInformation()\n");
    DPRINT("FsSizeInfo = %p\n", FsSizeInfo);

    if (*BufferLength < sizeof(FILE_FS_SIZE_INFORMATION))
        return(STATUS_BUFFER_OVERFLOW);

    DeviceExt = DeviceObject->DeviceExtension;

    FsSizeInfo->AvailableAllocationUnits.QuadPart = 0;
    FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->CdInfo.VolumeSpaceSize;
    FsSizeInfo->SectorsPerAllocationUnit = 1;
    FsSizeInfo->BytesPerSector = BLOCKSIZE;

    DPRINT("Finished FsdGetFsSizeInformation()\n");
    if (NT_SUCCESS(Status))
        *BufferLength -= sizeof(FILE_FS_SIZE_INFORMATION);

    return(Status);
}


static NTSTATUS
CdfsGetFsDeviceInformation
(
    PDEVICE_OBJECT DeviceObject,
    PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
    PULONG BufferLength
)
{
    DPRINT("CdfsGetFsDeviceInformation()\n");
    DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
    DPRINT("BufferLength %lu\n", *BufferLength);
    DPRINT("Required length %lu\n", sizeof(FILE_FS_DEVICE_INFORMATION));

    if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
        return(STATUS_BUFFER_OVERFLOW);

    FsDeviceInfo->DeviceType = FILE_DEVICE_CD_ROM;
    FsDeviceInfo->Characteristics = DeviceObject->Characteristics;

    DPRINT("FsdGetFsDeviceInformation() finished.\n");

    *BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
    DPRINT("BufferLength %lu\n", *BufferLength);

    return(STATUS_SUCCESS);
}


NTSTATUS NTAPI
CdfsQueryVolumeInformation(PDEVICE_OBJECT DeviceObject,
                           PIRP Irp)
{
    FS_INFORMATION_CLASS FsInformationClass;
    PIO_STACK_LOCATION Stack;
    NTSTATUS Status = STATUS_SUCCESS;
    PVOID SystemBuffer;
    ULONG BufferLength;

    DPRINT("CdfsQueryVolumeInformation() called\n");

    Stack = IoGetCurrentIrpStackLocation(Irp);
    FsInformationClass = Stack->Parameters.QueryVolume.FsInformationClass;
    BufferLength = Stack->Parameters.QueryVolume.Length;
    SystemBuffer = Irp->AssociatedIrp.SystemBuffer;

    DPRINT("FsInformationClass %d\n", FsInformationClass);
    DPRINT("SystemBuffer %x\n", SystemBuffer);

    switch (FsInformationClass)
    {
    case FileFsVolumeInformation:
        Status = CdfsGetFsVolumeInformation(DeviceObject,
            SystemBuffer,
            &BufferLength);
        break;

    case FileFsAttributeInformation:
        Status = CdfsGetFsAttributeInformation(DeviceObject->DeviceExtension,
            SystemBuffer,
            &BufferLength);
        break;

    case FileFsSizeInformation:
        Status = CdfsGetFsSizeInformation(DeviceObject,
            SystemBuffer,
            &BufferLength);
        break;

    case FileFsDeviceInformation:
        Status = CdfsGetFsDeviceInformation(DeviceObject,
            SystemBuffer,
            &BufferLength);
        break;

    default:
        Status = STATUS_NOT_SUPPORTED;
    }

    Irp->IoStatus.Status = Status;
    if (NT_SUCCESS(Status))
        Irp->IoStatus.Information =
        Stack->Parameters.QueryVolume.Length - BufferLength;
    else
        Irp->IoStatus.Information = 0;
    IoCompleteRequest(Irp, IO_NO_INCREMENT);

    return(Status);
}


NTSTATUS NTAPI
CdfsSetVolumeInformation(PDEVICE_OBJECT DeviceObject,
                         PIRP Irp)
{
    DPRINT("CdfsSetVolumeInformation() called\n");

    Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
    Irp->IoStatus.Information = 0;
    IoCompleteRequest(Irp, IO_NO_INCREMENT);

    return(STATUS_NOT_SUPPORTED);
}

/* EOF */