+++ /dev/null
-/*
- * PROJECT: ReactOS FAT file system driver
- * LICENSE: GNU GPLv3 as published by the Free Software Foundation
- * FILE: drivers/filesystems/fastfat/volume.c
- * PURPOSE: Volume information
- * PROGRAMMERS: Aleksey Bragin (aleksey@reactos.org)
- */
-
-/* INCLUDES *****************************************************************/
-
-#define NDEBUG
-#include "fastfat.h"
-
-/* FUNCTIONS ****************************************************************/
-
-NTSTATUS
-NTAPI
-FatiQueryFsVolumeInfo(PVCB Vcb,
- PFILE_FS_VOLUME_INFORMATION Buffer,
- PLONG Length)
-{
- ULONG ByteSize;
- NTSTATUS Status = STATUS_SUCCESS;
-
- /* Deduct the minimum written length */
- *Length -= FIELD_OFFSET(FILE_FS_VOLUME_INFORMATION, VolumeLabel[0]);
-
- /* Zero it */
- RtlZeroMemory(Buffer, sizeof(FILE_FS_VOLUME_INFORMATION));
-
- DPRINT("Serial number 0x%x, label length %d\n",
- Vcb->Vpb->SerialNumber, Vcb->Vpb->VolumeLabelLength);
-
- /* Save serial number */
- Buffer->VolumeSerialNumber = Vcb->Vpb->SerialNumber;
-
- /* Set max byte size */
- ByteSize = Vcb->Vpb->VolumeLabelLength;
-
- /* Check buffer length and reduce byte size if needed */
- if (*Length < Vcb->Vpb->VolumeLabelLength)
- {
- /* Copy only up to what buffer size was provided */
- ByteSize = *Length;
- Status = STATUS_BUFFER_OVERFLOW;
- }
-
- /* Copy volume label */
- Buffer->VolumeLabelLength = Vcb->Vpb->VolumeLabelLength;
- RtlCopyMemory(Buffer->VolumeLabel, Vcb->Vpb->VolumeLabel, ByteSize);
- *Length -= ByteSize;
-
- return Status;
-}
-
-NTSTATUS
-NTAPI
-FatiQueryFsSizeInfo(PVCB Vcb,
- PFILE_FS_SIZE_INFORMATION Buffer,
- PLONG Length)
-{
- FF_PARTITION *Partition;
- NTSTATUS Status = STATUS_SUCCESS;
-
- /* Deduct the minimum written length */
- *Length -= sizeof(FILE_FS_SIZE_INFORMATION);
-
- /* Zero it */
- RtlZeroMemory(Buffer, sizeof(FILE_FS_SIZE_INFORMATION));
-
- /* Reference FullFAT's partition */
- Partition = Vcb->Ioman->pPartition;
-
- /* Set values */
- Buffer->AvailableAllocationUnits.LowPart = Partition->FreeClusterCount;
- Buffer->TotalAllocationUnits.LowPart = Partition->NumClusters;
- Buffer->SectorsPerAllocationUnit = Vcb->Bpb.SectorsPerCluster;
- Buffer->BytesPerSector = Vcb->Bpb.BytesPerSector;
-
- DPRINT1("Total %d, free %d, SPC %d, BPS %d\n", Partition->NumClusters,
- Partition->FreeClusterCount, Vcb->Bpb.SectorsPerCluster, Vcb->Bpb.BytesPerSector);
-
- return Status;
-}
-
-NTSTATUS
-NTAPI
-FatiQueryFsDeviceInfo(PVCB Vcb,
- PFILE_FS_DEVICE_INFORMATION Buffer,
- PLONG Length)
-{
- /* Deduct the minimum written length */
- *Length -= sizeof(FILE_FS_DEVICE_INFORMATION);
-
- /* Zero it */
- RtlZeroMemory(Buffer, sizeof(FILE_FS_DEVICE_INFORMATION));
-
- /* Set values */
- Buffer->DeviceType = FILE_DEVICE_DISK;
- Buffer->Characteristics = Vcb->TargetDeviceObject->Characteristics;
-
- return STATUS_SUCCESS;
-}
-
-NTSTATUS
-NTAPI
-FatiQueryVolumeInfo(PFAT_IRP_CONTEXT IrpContext, PIRP Irp)
-{
- PFILE_OBJECT FileObject;
- PIO_STACK_LOCATION IrpSp;
- FILE_INFORMATION_CLASS InfoClass;
- TYPE_OF_OPEN FileType;
- PVCB Vcb;
- PFCB Fcb;
- PCCB Ccb;
- LONG Length;
- PVOID Buffer;
- BOOLEAN VcbLocked = FALSE;
- NTSTATUS Status = STATUS_SUCCESS;
-
- /* Get IRP stack location */
- IrpSp = IoGetCurrentIrpStackLocation(Irp);
-
- /* Get the file object */
- FileObject = IrpSp->FileObject;
-
- /* Copy variables to something with shorter names */
- InfoClass = IrpSp->Parameters.QueryVolume.FsInformationClass;
- Length = IrpSp->Parameters.QueryVolume.Length;
- Buffer = Irp->AssociatedIrp.SystemBuffer;
-
- DPRINT("FatiQueryVolumeInfo\n", 0);
- DPRINT("\tIrp = %08lx\n", Irp);
- DPRINT("\tLength = %08lx\n", Length);
- DPRINT("\tFsInformationClass = %08lx\n", InfoClass);
- DPRINT("\tBuffer = %08lx\n", Buffer);
-
- FileType = FatDecodeFileObject(FileObject, &Vcb, &Fcb, &Ccb);
-
- DPRINT("Vcb %p, Fcb %p, Ccb %p, open type %d\n", Vcb, Fcb, Ccb, FileType);
-
- switch (InfoClass)
- {
- case FileFsVolumeInformation:
- /* Acquired the shared VCB lock */
- if (!FatAcquireSharedVcb(IrpContext, Vcb))
- {
- ASSERT(FALSE);
- }
-
- /* Remember we locked it */
- VcbLocked = TRUE;
-
- /* Call FsVolumeInfo handler */
- Status = FatiQueryFsVolumeInfo(Vcb, Buffer, &Length);
- break;
-
- case FileFsSizeInformation:
- /* Call FsVolumeInfo handler */
- Status = FatiQueryFsSizeInfo(Vcb, Buffer, &Length);
- break;
-
- case FileFsDeviceInformation:
- Status = FatiQueryFsDeviceInfo(Vcb, Buffer, &Length);
- break;
-
- case FileFsAttributeInformation:
- UNIMPLEMENTED;
- //Status = FatiQueryFsAttributeInfo(IrpContext, Vcb, Buffer, &Length);
- break;
-
- case FileFsFullSizeInformation:
- UNIMPLEMENTED;
- //Status = FatiQueryFsFullSizeInfo(IrpContext, Vcb, Buffer, &Length);
- break;
-
- default:
- Status = STATUS_INVALID_PARAMETER;
- }
-
- /* Set IoStatus.Information to amount of filled bytes */
- Irp->IoStatus.Information = IrpSp->Parameters.QueryVolume.Length - Length;
-
- /* Release VCB lock */
- if (VcbLocked) FatReleaseVcb(IrpContext, Vcb);
-
- /* Complete request and return status */
- FatCompleteRequest(IrpContext, Irp, Status);
- return Status;
-}
-
-NTSTATUS
-NTAPI
-FatQueryVolumeInfo(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-{
- NTSTATUS Status;
- BOOLEAN TopLevel, CanWait;
- PFAT_IRP_CONTEXT IrpContext;
-
- CanWait = TRUE;
- TopLevel = FALSE;
- Status = STATUS_INVALID_DEVICE_REQUEST;
-
- /* Get CanWait flag */
- if (IoGetCurrentIrpStackLocation(Irp)->FileObject != NULL)
- CanWait = IoIsOperationSynchronous(Irp);
-
- /* Enter FsRtl critical region */
- FsRtlEnterFileSystem();
-
- /* Set Top Level IRP if not set */
- TopLevel = FatIsTopLevelIrp(Irp);
-
- /* Build an irp context */
- IrpContext = FatBuildIrpContext(Irp, CanWait);
-
- /* Call the request handler */
- Status = FatiQueryVolumeInfo(IrpContext, Irp);
-
- /* Restore top level Irp */
- if (TopLevel)
- IoSetTopLevelIrp(NULL);
-
- /* Leave FsRtl critical region */
- FsRtlExitFileSystem();
-
- return Status;
-}
-
-NTSTATUS
-NTAPI
-FatSetVolumeInfo(PDEVICE_OBJECT DeviceObject, PIRP Irp)
-{
- DPRINT1("FatSetVolumeInfo()\n");
- return STATUS_NOT_IMPLEMENTED;
-}
-
-VOID
-NTAPI
-FatReadStreamFile(PVCB Vcb,
- ULONGLONG ByteOffset,
- ULONG ByteSize,
- PBCB *Bcb,
- PVOID *Buffer)
-{
- LARGE_INTEGER Offset;
-
- Offset.QuadPart = ByteOffset;
-
- if (!CcMapData(Vcb->StreamFileObject,
- &Offset,
- ByteSize,
- TRUE, // FIXME: CanWait
- Bcb,
- Buffer))
- {
- ASSERT(FALSE);
- }
-}
-
-BOOLEAN
-NTAPI
-FatCheckForDismount(IN PFAT_IRP_CONTEXT IrpContext,
- PVCB Vcb,
- IN BOOLEAN Force)
-{
- /* We never allow deletion of a volume for now */
- return FALSE;
-}
-
-/* EOF */
projects / reactos.git / blobdiff