94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
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/*++
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Copyright (c) 2000-2001 Microsoft Corporation
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Module Name:
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close.c
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Abstract:
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This module implements routines related to handling IRP_MJ_CLOSE.
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--*/
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#include "gdfx.h"
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NTSTATUS
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GdfxFsdClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine is called by the I/O manager to handle IRP_MJ_CLOSE requests.
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Arguments:
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DeviceObject - Specifies the device object that the I/O request is for.
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Irp - Specifies the packet that describes the I/O request.
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Return Value:
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Status of operation.
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--*/
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{
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PGDF_VOLUME_EXTENSION VolumeExtension;
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PIO_STACK_LOCATION IrpSp;
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PFILE_OBJECT FileObject;
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PDIRECTORY_ENUM_CONTEXT DirectoryEnumContext;
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PGDF_FCB Fcb;
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VolumeExtension = (PGDF_VOLUME_EXTENSION)DeviceObject->DeviceExtension;
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IrpSp = IoGetCurrentIrpStackLocation(Irp);
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FileObject = IrpSp->FileObject;
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//
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// Synchronize access to the file control block lists by acquiring the
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// global mutex.
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//
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GdfxAcquireGlobalMutexExclusive();
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//
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// Delete the directory enumeration context if one exists.
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//
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DirectoryEnumContext = (PDIRECTORY_ENUM_CONTEXT)FileObject->FsContext2;
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if (DirectoryEnumContext != NULL) {
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FileObject->FsContext2 = NULL;
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ExFreePool(DirectoryEnumContext);
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}
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//
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// Dereference the file control block associated with the file object.
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//
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Fcb = (PGDF_FCB)FileObject->FsContext;
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FileObject->FsContext = NULL;
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GdfxDereferenceFcb(Fcb);
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//
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// Decrement the file object count for the volume and check if we're ready
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// to delete this device object.
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//
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VolumeExtension->FileObjectCount--;
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if ((VolumeExtension->FileObjectCount == 0) && VolumeExtension->Dismounted) {
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GdfxDeleteVolumeDevice(DeviceObject);
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}
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GdfxReleaseGlobalMutex();
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Irp->IoStatus.Status = STATUS_SUCCESS;
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IoCompleteRequest(Irp, IO_NO_INCREMENT);
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return STATUS_SUCCESS;
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}
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