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113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/**
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* @file sys/close.c
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*
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* @copyright 2015-2016 Bill Zissimopoulos
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*/
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#include <sys/driver.h>
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static NTSTATUS FspFsctlClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
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static NTSTATUS FspFsvrtClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
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static NTSTATUS FspFsvolClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
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FSP_IOCMPL_DISPATCH FspFsvolCloseComplete;
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FSP_DRIVER_DISPATCH FspClose;
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, FspFsctlClose)
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#pragma alloc_text(PAGE, FspFsvrtClose)
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#pragma alloc_text(PAGE, FspFsvolClose)
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#pragma alloc_text(PAGE, FspFsvolCloseComplete)
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#pragma alloc_text(PAGE, FspClose)
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#endif
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static NTSTATUS FspFsctlClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
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{
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PAGED_CODE();
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Irp->IoStatus.Information = 0;
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return STATUS_SUCCESS;
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}
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static NTSTATUS FspFsvrtClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
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{
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PAGED_CODE();
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Irp->IoStatus.Information = 0;
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return STATUS_SUCCESS;
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}
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static NTSTATUS FspFsvolClose(
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PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
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{
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PAGED_CODE();
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/* is this a valid FileObject? */
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if (!FspFileNodeIsValid(IrpSp->FileObject->FsContext))
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return STATUS_SUCCESS;
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PFILE_OBJECT FileObject = IrpSp->FileObject;
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FSP_FILE_NODE *FileNode = FileObject->FsContext;
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FSP_FILE_DESC *FileDesc = FileObject->FsContext2;
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FSP_FSCTL_TRANSACT_REQ *Request;
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ASSERT(FileNode == FileDesc->FileNode);
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/* create the user-mode file system request; MustSucceed because IRP_MJ_CLOSE cannot fail */
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FspIopCreateRequestMustSucceed(0, 0, 0, &Request);
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Request->Kind = FspFsctlTransactCloseKind;
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Request->Req.Close.UserContext = FileNode->UserContext;
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Request->Req.Close.UserContext2 = FileDesc->UserContext2;
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FspFileNodeClose(FileNode, FileObject);
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FspFileNodeDereference(FileNode);
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FspFileDescDelete(FileDesc);
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/*
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* Post as a BestEffort work request. This allows us to complete our own IRP
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* and return immediately.
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*/
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FspIopPostWorkRequestBestEffort(FsvolDeviceObject, Request);
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/*
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* Note that it is still possible for this request to not be delivered,
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* if the volume device Ioq is stopped. But such failures are benign
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* from our perspective, because they mean that the file system is going
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* away and should correctly tear things down.
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*/
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Irp->IoStatus.Information = 0;
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return STATUS_SUCCESS;
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}
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NTSTATUS FspFsvolCloseComplete(
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PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
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{
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FSP_ENTER_IOC(PAGED_CODE());
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FSP_LEAVE_IOC("FileObject=%p", IrpSp->FileObject);
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}
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NTSTATUS FspClose(
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PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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FSP_ENTER_MJ(PAGED_CODE());
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switch (FspDeviceExtension(DeviceObject)->Kind)
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{
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case FspFsvolDeviceExtensionKind:
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FSP_RETURN(Result = FspFsvolClose(DeviceObject, Irp, IrpSp));
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case FspFsvrtDeviceExtensionKind:
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FSP_RETURN(Result = FspFsvrtClose(DeviceObject, Irp, IrpSp));
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case FspFsctlDeviceExtensionKind:
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FSP_RETURN(Result = FspFsctlClose(DeviceObject, Irp, IrpSp));
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default:
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FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
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}
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FSP_LEAVE_MJ("FileObject=%p", IrpSp->FileObject);
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}
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