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294 lines
8.5 KiB
C
294 lines
8.5 KiB
C
/* $Id: volume.c,v 1.25 2003/11/12 15:26:44 ekohl Exp $
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*
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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/vfat/volume.c
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* PURPOSE: VFAT Filesystem
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* PROGRAMMER: Jason Filby (jasonfilby@yahoo.com)
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* Hartmut Birr
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*/
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/* INCLUDES *****************************************************************/
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#include <ddk/ntddk.h>
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#include <wchar.h>
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#define NDEBUG
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#include <debug.h>
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#include "vfat.h"
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/* FUNCTIONS ****************************************************************/
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static NTSTATUS
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FsdGetFsVolumeInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_VOLUME_INFORMATION FsVolumeInfo,
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PULONG BufferLength)
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{
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DPRINT("FsdGetFsVolumeInformation()\n");
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DPRINT("FsVolumeInfo = %p\n", FsVolumeInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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DPRINT("Required length %lu\n", (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength));
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DPRINT("LabelLength %hu\n", DeviceObject->Vpb->VolumeLabelLength);
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DPRINT("Label %*.S\n", DeviceObject->Vpb->VolumeLabelLength / sizeof(WCHAR), DeviceObject->Vpb->VolumeLabel);
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if (*BufferLength < sizeof(FILE_FS_VOLUME_INFORMATION))
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return STATUS_INFO_LENGTH_MISMATCH;
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if (*BufferLength < (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength))
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return STATUS_BUFFER_OVERFLOW;
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/* valid entries */
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FsVolumeInfo->VolumeSerialNumber = DeviceObject->Vpb->SerialNumber;
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FsVolumeInfo->VolumeLabelLength = DeviceObject->Vpb->VolumeLabelLength;
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memcpy(FsVolumeInfo->VolumeLabel, DeviceObject->Vpb->VolumeLabel, FsVolumeInfo->VolumeLabelLength);
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/* dummy entries */
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FsVolumeInfo->VolumeCreationTime.QuadPart = 0;
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FsVolumeInfo->SupportsObjects = FALSE;
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DPRINT("Finished FsdGetFsVolumeInformation()\n");
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*BufferLength -= (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdGetFsAttributeInformation(PDEVICE_EXTENSION DeviceExt,
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PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
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PULONG BufferLength)
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{
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WCHAR* pName; ULONG Length;
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DPRINT("FsdGetFsAttributeInformation()\n");
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DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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DPRINT("Required length %lu\n", (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length));
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if (*BufferLength < sizeof (FILE_FS_ATTRIBUTE_INFORMATION))
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return STATUS_INFO_LENGTH_MISMATCH;
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if (DeviceExt->FatInfo.FatType == FAT32)
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{
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Length = 10;
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pName = L"FAT32";
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}
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else
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{
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Length = 6;
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pName = L"FAT";
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}
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if (*BufferLength < (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length))
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return STATUS_BUFFER_OVERFLOW;
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FsAttributeInfo->FileSystemAttributes =
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FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK;
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FsAttributeInfo->MaximumComponentNameLength = 255;
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FsAttributeInfo->FileSystemNameLength = Length;
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memcpy(FsAttributeInfo->FileSystemName, pName, Length );
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DPRINT("Finished FsdGetFsAttributeInformation()\n");
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*BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdGetFsSizeInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_SIZE_INFORMATION FsSizeInfo,
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PULONG BufferLength)
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{
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PDEVICE_EXTENSION DeviceExt;
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NTSTATUS Status;
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DPRINT("FsdGetFsSizeInformation()\n");
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DPRINT("FsSizeInfo = %p\n", FsSizeInfo);
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if (*BufferLength < sizeof(FILE_FS_SIZE_INFORMATION))
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return(STATUS_BUFFER_OVERFLOW);
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DeviceExt = DeviceObject->DeviceExtension;
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Status = CountAvailableClusters(DeviceExt, &FsSizeInfo->AvailableAllocationUnits);
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FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->FatInfo.NumberOfClusters;
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FsSizeInfo->SectorsPerAllocationUnit = DeviceExt->FatInfo.SectorsPerCluster;
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FsSizeInfo->BytesPerSector = DeviceExt->FatInfo.BytesPerSector;
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DPRINT("Finished FsdGetFsSizeInformation()\n");
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if (NT_SUCCESS(Status))
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*BufferLength -= sizeof(FILE_FS_SIZE_INFORMATION);
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return(Status);
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}
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static NTSTATUS
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FsdGetFsDeviceInformation(PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
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PULONG BufferLength)
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{
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DPRINT("FsdGetFsDeviceInformation()\n");
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DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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DPRINT("Required length %lu\n", sizeof(FILE_FS_DEVICE_INFORMATION));
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if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
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return(STATUS_BUFFER_OVERFLOW);
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FsDeviceInfo->DeviceType = FILE_DEVICE_DISK;
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FsDeviceInfo->Characteristics = 0; /* FIXME: fix this !! */
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DPRINT("FsdGetFsDeviceInformation() finished.\n");
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*BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdSetFsLabelInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_LABEL_INFORMATION FsLabelInfo)
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{
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DPRINT("FsdSetFsLabelInformation()\n");
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return(STATUS_NOT_IMPLEMENTED);
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}
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NTSTATUS VfatQueryVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
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/*
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* FUNCTION: Retrieve the specified volume information
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*/
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{
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FS_INFORMATION_CLASS FsInformationClass;
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NTSTATUS RC = STATUS_SUCCESS;
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PVOID SystemBuffer;
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ULONG BufferLength;
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/* PRECONDITION */
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assert(IrpContext);
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DPRINT("VfatQueryVolumeInformation(IrpContext %x)\n", IrpContext);
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if (!ExAcquireResourceSharedLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
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(BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
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{
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return VfatQueueRequest (IrpContext);
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}
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/* INITIALIZATION */
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FsInformationClass = IrpContext->Stack->Parameters.QueryVolume.FsInformationClass;
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BufferLength = IrpContext->Stack->Parameters.QueryVolume.Length;
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SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
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DPRINT ("FsInformationClass %d\n", FsInformationClass);
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DPRINT ("SystemBuffer %x\n", SystemBuffer);
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switch (FsInformationClass)
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{
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case FileFsVolumeInformation:
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RC = FsdGetFsVolumeInformation(IrpContext->DeviceObject,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsAttributeInformation:
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RC = FsdGetFsAttributeInformation(IrpContext->DeviceObject->DeviceExtension,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsSizeInformation:
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RC = FsdGetFsSizeInformation(IrpContext->DeviceObject,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsDeviceInformation:
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RC = FsdGetFsDeviceInformation(SystemBuffer,
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&BufferLength);
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break;
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default:
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RC = STATUS_NOT_SUPPORTED;
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}
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ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
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IrpContext->Irp->IoStatus.Status = RC;
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if (NT_SUCCESS(RC))
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IrpContext->Irp->IoStatus.Information =
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IrpContext->Stack->Parameters.QueryVolume.Length - BufferLength;
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else
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IrpContext->Irp->IoStatus.Information = 0;
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IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
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VfatFreeIrpContext(IrpContext);
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return RC;
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}
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NTSTATUS VfatSetVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
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/*
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* FUNCTION: Set the specified volume information
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*/
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{
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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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PEXTENDED_IO_STACK_LOCATION Stack = (PEXTENDED_IO_STACK_LOCATION) IrpContext->Stack;
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/* PRECONDITION */
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assert(IrpContext);
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DPRINT1("VfatSetVolumeInformation(IrpContext %x)\n", IrpContext);
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if (!ExAcquireResourceExclusiveLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
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(BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
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{
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return VfatQueueRequest (IrpContext);
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}
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FsInformationClass = Stack->Parameters.SetVolume.FsInformationClass;
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BufferLength = Stack->Parameters.SetVolume.Length;
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SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
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DPRINT1("FsInformationClass %d\n", FsInformationClass);
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DPRINT1("BufferLength %d\n", BufferLength);
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DPRINT1("SystemBuffer %x\n", SystemBuffer);
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switch(FsInformationClass)
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{
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case FileFsLabelInformation:
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Status = FsdSetFsLabelInformation(IrpContext->DeviceObject,
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SystemBuffer);
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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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ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
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IrpContext->Irp->IoStatus.Status = Status;
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IrpContext->Irp->IoStatus.Information = 0;
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IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
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VfatFreeIrpContext(IrpContext);
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return(Status);
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}
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/* EOF */
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