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093e6f6d3c
- Implement FatRead as a wrapper around internal helper FatiRead. - Stubplement FatiRead. svn path=/trunk/; revision=39029
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* PROJECT: ReactOS FAT file system driver
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: drivers/filesystems/fastfat/rw.c
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* PURPOSE: Read/write support
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* PROGRAMMERS: Aleksey Bragin (aleksey@reactos.org)
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* Alexey Vlasov
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*/
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/* INCLUDES *****************************************************************/
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#define NDEBUG
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#include "fastfat.h"
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/* FUNCTIONS *****************************************************************/
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NTSTATUS
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NTAPI
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FatiRead(PFAT_IRP_CONTEXT IrpContext)
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{
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CSHORT FcbType;
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ULONG NumberOfBytes;
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FcbType = *((PCSHORT) IrpContext->FileObject->FsContext);
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NumberOfBytes = IrpContext->Stack->Parameters.Read.Length;
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if (NumberOfBytes == 0)
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{
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FatCompleteRequest(IrpContext, IrpContext->Irp, STATUS_SUCCESS);
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return STATUS_SUCCESS;
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}
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//if (FcbType == FAT_NTC_VCB)
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DPRINT1("FatiRead()\n");
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return STATUS_NOT_IMPLEMENTED;
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}
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NTSTATUS
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NTAPI
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FatRead(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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NTSTATUS Status;
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BOOLEAN TopLevel, CanWait;
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PFAT_IRP_CONTEXT IrpContext;
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CanWait = TRUE;
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TopLevel = FALSE;
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Status = STATUS_INVALID_DEVICE_REQUEST;
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/* Get CanWait flag */
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if (IoGetCurrentIrpStackLocation(Irp)->FileObject != NULL)
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CanWait = IoIsOperationSynchronous(Irp);
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/* Enter FsRtl critical region */
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FsRtlEnterFileSystem();
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if (DeviceObject != FatGlobalData.DiskDeviceObject)
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{
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/* Set Top Level IRP if not set */
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if (IoGetTopLevelIrp() == NULL)
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{
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IoSetTopLevelIrp(Irp);
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TopLevel = TRUE;
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}
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/* Build an irp context */
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IrpContext = FatBuildIrpContext(Irp, CanWait);
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/* Perform the actual read */
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Status = FatiRead(IrpContext);
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/* Restore top level Irp */
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if (TopLevel)
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IoSetTopLevelIrp(NULL);
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}
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/* Leave FsRtl critical region */
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FsRtlExitFileSystem();
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DPRINT1("FatRead()\n");
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return Status;
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}
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NTSTATUS
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NTAPI
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FatWrite(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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DPRINT1("FatWrite()\n");
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return STATUS_NOT_IMPLEMENTED;
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}
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