/*
* ReactOS kernel
- * Copyright (C) 2002 ReactOS Team
+ * 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
* PROJECT: ReactOS kernel
* FILE: drivers/filesystem/ntfs/volume.c
* PURPOSE: NTFS filesystem driver
- * PROGRAMMER: Eric Kohl
+ * PROGRAMMERS: Eric Kohl
+ * Pierre Schweitzer (pierre@reactos.org)
*/
/* INCLUDES *****************************************************************/
/* FUNCTIONS ****************************************************************/
-static
ULONGLONG
NtfsGetFreeClusters(PDEVICE_EXTENSION DeviceExt)
{
- UNIMPLEMENTED;
- return 0;
+ 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;
+ PCHAR BitmapData;
+ ULONGLONG FreeClusters = 0;
+ RTL_BITMAP Bitmap;
+
+ 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 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);
+ 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 0;
+ }
+
+ 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)
+ {
+ // TODO: Observe MFT reservation zone
+
+ // Can we get one contiguous run?
+ ULONG AssignedRun = RtlFindClearBitsAndSet(&Bitmap, DesiredClusters, FirstDesiredCluster);
+ ULONG LengthWritten;
+
+ 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);
+ }
+ else
+ Status = STATUS_DISK_FULL;
+
+
+ ReleaseAttributeContext(DataContext);
+
+ ExFreePoolWithTag(BitmapData, TAG_NTFS);
+ ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
+
+ return Status;
}
static
sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength);
DPRINT("LabelLength %hu\n",
DeviceObject->Vpb->VolumeLabelLength);
- DPRINT("Label %*.S\n",
+ DPRINT("Label %.*S\n",
DeviceObject->Vpb->VolumeLabelLength / sizeof(WCHAR),
DeviceObject->Vpb->VolumeLabel);
return STATUS_BUFFER_OVERFLOW;
FsAttributeInfo->FileSystemAttributes =
- FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK;
+ FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK | FILE_READ_ONLY_VOLUME;
FsAttributeInfo->MaximumComponentNameLength = 255;
FsAttributeInfo->FileSystemNameLength = 8;
DeviceExt = DeviceObject->DeviceExtension;
FsSizeInfo->AvailableAllocationUnits.QuadPart = NtfsGetFreeClusters(DeviceExt);
- FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->NtfsInfo.SectorCount / DeviceExt->NtfsInfo.SectorsPerCluster;
+ FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->NtfsInfo.ClusterCount;
FsSizeInfo->SectorsPerAllocationUnit = DeviceExt->NtfsInfo.SectorsPerCluster;
FsSizeInfo->BytesPerSector = DeviceExt->NtfsInfo.BytesPerSector;
NTSTATUS Status = STATUS_SUCCESS;
PVOID SystemBuffer;
ULONG BufferLength;
+ PDEVICE_EXTENSION DeviceExt;
DPRINT("NtfsQueryVolumeInformation() called\n");
Irp = IrpContext->Irp;
DeviceObject = IrpContext->DeviceObject;
- Stack = IoGetCurrentIrpStackLocation(Irp);
+ 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;
Status = STATUS_NOT_SUPPORTED;
}
+ ExReleaseResourceLite(&DeviceExt->DirResource);
+
if (NT_SUCCESS(Status))
Irp->IoStatus.Information =
Stack->Parameters.QueryVolume.Length - BufferLength;
projects / reactos.git / blobdiff