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reactos/drivers/filesystems/ntfs/volinfo.c
Trevor Thompson c25b9747a1 [NTFS] - Expand support for resizing resident attributes and fix NtfsAllocateClusters(). 
-Modify SetAttributeDataLength() to allow a resident attribute to migrate to non-resident if the attribute grows too large to remain resident.
-Fix values returned by NtfsAllocateClusters() in case of error; return error codes, not 0.

svn path=/branches/GSoC_2016/NTFS/; revision=74524
2017-12-10 11:14:18 +01:00

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/*
* ReactOS kernel
* Copyright (C) 2002, 2014 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: drivers/filesystem/ntfs/volume.c
* PURPOSE: NTFS filesystem driver
* PROGRAMMERS: Eric Kohl
* Pierre Schweitzer (pierre@reactos.org)
*/
/* INCLUDES *****************************************************************/
#include "ntfs.h"
#define NDEBUG
#include <debug.h>
/* FUNCTIONS ****************************************************************/
ULONGLONG
NtfsGetFreeClusters(PDEVICE_EXTENSION DeviceExt)
{
NTSTATUS Status;
PFILE_RECORD_HEADER BitmapRecord;
PNTFS_ATTR_CONTEXT DataContext;
ULONGLONG BitmapDataSize;
PCHAR BitmapData;
ULONGLONG FreeClusters = 0;
ULONG Read = 0;
RTL_BITMAP Bitmap;
DPRINT1("NtfsGetFreeClusters(%p)\n", DeviceExt);
BitmapRecord = ExAllocatePoolWithTag(NonPagedPool,
DeviceExt->NtfsInfo.BytesPerFileRecord,
TAG_NTFS);
if (BitmapRecord == NULL)
{
return 0;
}
Status = ReadFileRecord(DeviceExt, NTFS_FILE_BITMAP, BitmapRecord);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return 0;
}
Status = FindAttribute(DeviceExt, BitmapRecord, AttributeData, L"", 0, &DataContext, NULL);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return 0;
}
BitmapDataSize = AttributeDataLength(&DataContext->Record);
ASSERT((BitmapDataSize * 8) >= DeviceExt->NtfsInfo.ClusterCount);
BitmapData = ExAllocatePoolWithTag(NonPagedPool, ROUND_UP(BitmapDataSize, DeviceExt->NtfsInfo.BytesPerSector), TAG_NTFS);
if (BitmapData == NULL)
{
ReleaseAttributeContext(DataContext);
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return 0;
}
/* FIXME: Totally underoptimized! */
for (; Read < BitmapDataSize; Read += DeviceExt->NtfsInfo.BytesPerSector)
{
ReadAttribute(DeviceExt, DataContext, Read, (PCHAR)((ULONG_PTR)BitmapData + Read), DeviceExt->NtfsInfo.BytesPerSector);
}
ReleaseAttributeContext(DataContext);
DPRINT1("Total clusters: %I64x\n", DeviceExt->NtfsInfo.ClusterCount);
DPRINT1("Total clusters in bitmap: %I64x\n", BitmapDataSize * 8);
DPRINT1("Diff in size: %I64d B\n", ((BitmapDataSize * 8) - DeviceExt->NtfsInfo.ClusterCount) * DeviceExt->NtfsInfo.SectorsPerCluster * DeviceExt->NtfsInfo.BytesPerSector);
RtlInitializeBitMap(&Bitmap, (PULONG)BitmapData, DeviceExt->NtfsInfo.ClusterCount);
FreeClusters = RtlNumberOfClearBits(&Bitmap);
ExFreePoolWithTag(BitmapData, TAG_NTFS);
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return FreeClusters;
}
/**
* NtfsAllocateClusters
* Allocates a run of clusters. The run allocated might be smaller than DesiredClusters.
*/
NTSTATUS
NtfsAllocateClusters(PDEVICE_EXTENSION DeviceExt,
ULONG FirstDesiredCluster,
ULONG DesiredClusters,
PULONG FirstAssignedCluster,
PULONG AssignedClusters)
{
NTSTATUS Status;
PFILE_RECORD_HEADER BitmapRecord;
PNTFS_ATTR_CONTEXT DataContext;
ULONGLONG BitmapDataSize;
PUCHAR BitmapData;
ULONGLONG FreeClusters = 0;
RTL_BITMAP Bitmap;
ULONG AssignedRun;
ULONG LengthWritten;
DPRINT1("NtfsAllocateClusters(%p, %lu, %lu, %p, %p)\n", DeviceExt, FirstDesiredCluster, DesiredClusters, FirstAssignedCluster, AssignedClusters);
BitmapRecord = ExAllocatePoolWithTag(NonPagedPool,
DeviceExt->NtfsInfo.BytesPerFileRecord,
TAG_NTFS);
if (BitmapRecord == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
Status = ReadFileRecord(DeviceExt, NTFS_FILE_BITMAP, BitmapRecord);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return Status;
}
Status = FindAttribute(DeviceExt, BitmapRecord, AttributeData, L"", 0, &DataContext, NULL);
if (!NT_SUCCESS(Status))
{
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return Status;
}
BitmapDataSize = AttributeDataLength(&DataContext->Record);
BitmapDataSize = min(BitmapDataSize, 0xffffffff);
ASSERT((BitmapDataSize * 8) >= DeviceExt->NtfsInfo.ClusterCount);
BitmapData = ExAllocatePoolWithTag(NonPagedPool, ROUND_UP(BitmapDataSize, DeviceExt->NtfsInfo.BytesPerSector), TAG_NTFS);
if (BitmapData == NULL)
{
ReleaseAttributeContext(DataContext);
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return STATUS_INSUFFICIENT_RESOURCES;
}
DPRINT1("Total clusters: %I64x\n", DeviceExt->NtfsInfo.ClusterCount);
DPRINT1("Total clusters in bitmap: %I64x\n", BitmapDataSize * 8);
DPRINT1("Diff in size: %I64d B\n", ((BitmapDataSize * 8) - DeviceExt->NtfsInfo.ClusterCount) * DeviceExt->NtfsInfo.SectorsPerCluster * DeviceExt->NtfsInfo.BytesPerSector);
ReadAttribute(DeviceExt, DataContext, 0, (PCHAR)BitmapData, (ULONG)BitmapDataSize);
RtlInitializeBitMap(&Bitmap, (PULONG)BitmapData, DeviceExt->NtfsInfo.ClusterCount);
FreeClusters = RtlNumberOfClearBits(&Bitmap);
if (FreeClusters < DesiredClusters)
{
ReleaseAttributeContext(DataContext);
ExFreePoolWithTag(BitmapData, TAG_NTFS);
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return STATUS_DISK_FULL;
}
// TODO: Observe MFT reservation zone
// Can we get one contiguous run?
AssignedRun = RtlFindClearBitsAndSet(&Bitmap, DesiredClusters, FirstDesiredCluster);
if (AssignedRun != 0xFFFFFFFF)
{
*FirstAssignedCluster = AssignedRun;
*AssignedClusters = DesiredClusters;
}
else
{
// we can't get one contiguous run
*AssignedClusters = RtlFindNextForwardRunClear(&Bitmap, FirstDesiredCluster, FirstAssignedCluster);
if (*AssignedClusters == 0)
{
// we couldn't find any runs starting at DesiredFirstCluster
*AssignedClusters = RtlFindLongestRunClear(&Bitmap, FirstAssignedCluster);
}
}
Status = WriteAttribute(DeviceExt, DataContext, 0, BitmapData, (ULONG)BitmapDataSize, &LengthWritten);
ReleaseAttributeContext(DataContext);
ExFreePoolWithTag(BitmapData, TAG_NTFS);
ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
return Status;
}
static
NTSTATUS
NtfsGetFsVolumeInformation(PDEVICE_OBJECT DeviceObject,
PFILE_FS_VOLUME_INFORMATION FsVolumeInfo,
PULONG BufferLength)
{
DPRINT("NtfsGetFsVolumeInformation() 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;
*BufferLength -= (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength);
DPRINT("BufferLength %lu\n", *BufferLength);
DPRINT("NtfsGetFsVolumeInformation() done\n");
return STATUS_SUCCESS;
}
static
NTSTATUS
NtfsGetFsAttributeInformation(PDEVICE_EXTENSION DeviceExt,
PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
PULONG BufferLength)
{
UNREFERENCED_PARAMETER(DeviceExt);
DPRINT("NtfsGetFsAttributeInformation()\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 | FILE_READ_ONLY_VOLUME;
FsAttributeInfo->MaximumComponentNameLength = 255;
FsAttributeInfo->FileSystemNameLength = 8;
memcpy(FsAttributeInfo->FileSystemName, L"NTFS", 8);
DPRINT("Finished NtfsGetFsAttributeInformation()\n");
*BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
DPRINT("BufferLength %lu\n", *BufferLength);
return STATUS_SUCCESS;
}
static
NTSTATUS
NtfsGetFsSizeInformation(PDEVICE_OBJECT DeviceObject,
PFILE_FS_SIZE_INFORMATION FsSizeInfo,
PULONG BufferLength)
{
PDEVICE_EXTENSION DeviceExt;
NTSTATUS Status = STATUS_SUCCESS;
DPRINT("NtfsGetFsSizeInformation()\n");
DPRINT("FsSizeInfo = %p\n", FsSizeInfo);
if (*BufferLength < sizeof(FILE_FS_SIZE_INFORMATION))
return STATUS_BUFFER_OVERFLOW;
DeviceExt = DeviceObject->DeviceExtension;
FsSizeInfo->AvailableAllocationUnits.QuadPart = NtfsGetFreeClusters(DeviceExt);
FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->NtfsInfo.ClusterCount;
FsSizeInfo->SectorsPerAllocationUnit = DeviceExt->NtfsInfo.SectorsPerCluster;
FsSizeInfo->BytesPerSector = DeviceExt->NtfsInfo.BytesPerSector;
DPRINT("Finished NtfsGetFsSizeInformation()\n");
if (NT_SUCCESS(Status))
*BufferLength -= sizeof(FILE_FS_SIZE_INFORMATION);
return Status;
}
static
NTSTATUS
NtfsGetFsDeviceInformation(PDEVICE_OBJECT DeviceObject,
PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
PULONG BufferLength)
{
DPRINT("NtfsGetFsDeviceInformation()\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_DISK;
FsDeviceInfo->Characteristics = DeviceObject->Characteristics;
DPRINT("NtfsGetFsDeviceInformation() finished.\n");
*BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
DPRINT("BufferLength %lu\n", *BufferLength);
return STATUS_SUCCESS;
}
NTSTATUS
NtfsQueryVolumeInformation(PNTFS_IRP_CONTEXT IrpContext)
{
PIRP Irp;
PDEVICE_OBJECT DeviceObject;
FS_INFORMATION_CLASS FsInformationClass;
PIO_STACK_LOCATION Stack;
NTSTATUS Status = STATUS_SUCCESS;
PVOID SystemBuffer;
ULONG BufferLength;
PDEVICE_EXTENSION DeviceExt;
DPRINT("NtfsQueryVolumeInformation() called\n");
ASSERT(IrpContext);
Irp = IrpContext->Irp;
DeviceObject = IrpContext->DeviceObject;
DeviceExt = DeviceObject->DeviceExtension;
Stack = IrpContext->Stack;
if (!ExAcquireResourceSharedLite(&DeviceExt->DirResource,
BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT)))
{
return NtfsMarkIrpContextForQueue(IrpContext);
}
FsInformationClass = Stack->Parameters.QueryVolume.FsInformationClass;
BufferLength = Stack->Parameters.QueryVolume.Length;
SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
RtlZeroMemory(SystemBuffer, BufferLength);
DPRINT("FsInformationClass %d\n", FsInformationClass);
DPRINT("SystemBuffer %p\n", SystemBuffer);
switch (FsInformationClass)
{
case FileFsVolumeInformation:
Status = NtfsGetFsVolumeInformation(DeviceObject,
SystemBuffer,
&BufferLength);
break;
case FileFsAttributeInformation:
Status = NtfsGetFsAttributeInformation(DeviceObject->DeviceExtension,
SystemBuffer,
&BufferLength);
break;
case FileFsSizeInformation:
Status = NtfsGetFsSizeInformation(DeviceObject,
SystemBuffer,
&BufferLength);
break;
case FileFsDeviceInformation:
Status = NtfsGetFsDeviceInformation(DeviceObject,
SystemBuffer,
&BufferLength);
break;
default:
Status = STATUS_NOT_SUPPORTED;
}
ExReleaseResourceLite(&DeviceExt->DirResource);
if (NT_SUCCESS(Status))
Irp->IoStatus.Information =
Stack->Parameters.QueryVolume.Length - BufferLength;
else
Irp->IoStatus.Information = 0;
return Status;
}
NTSTATUS
NtfsSetVolumeInformation(PNTFS_IRP_CONTEXT IrpContext)
{
PIRP Irp;
DPRINT("NtfsSetVolumeInformation() called\n");
ASSERT(IrpContext);
Irp = IrpContext->Irp;
Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;
Irp->IoStatus.Information = 0;
return STATUS_NOT_SUPPORTED;
}
/* EOF */
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