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103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/**
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* @file sys/idevctl.c
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*
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* @copyright 2015 Bill Zissimopoulos
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*/
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#include <sys/driver.h>
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static NTSTATUS FspFsvolInternalDeviceControl(
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PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
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FSP_IOCMPL_DISPATCH FspFsvolInternalDeviceControlComplete;
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FSP_DRIVER_DISPATCH FspInternalDeviceControl;
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, FspFsvolInternalDeviceControl)
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#pragma alloc_text(PAGE, FspFsvolInternalDeviceControlComplete)
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#pragma alloc_text(PAGE, FspInternalDeviceControl)
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#endif
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static NTSTATUS FspFsvolInternalDeviceControl(
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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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NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
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switch (IrpSp->Parameters.DeviceIoControl.IoControlCode)
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{
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case FSP_FSCTL_WORK:
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{
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FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
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PDEVICE_OBJECT FsvrtDeviceObject = FsvolDeviceExtension->FsvrtDeviceObject;
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if (!FspDeviceRetain(FsvrtDeviceObject))
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return STATUS_CANCELLED;
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try
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{
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FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
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FspFsvrtDeviceExtension(FsvrtDeviceObject);
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FSP_FSCTL_TRANSACT_REQ *Request = IrpSp->Parameters.DeviceIoControl.Type3InputBuffer;
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ASSERT(0 == Request->Hint);
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/* associate the passed Request with our Irp; acquire ownership of the Request */
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Request->Hint = (UINT_PTR)Irp;
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FspIrpRequest(Irp) = Request;
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/*
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* Post the IRP to our Ioq; we do this here instead of at IRP_LEAVE_MJ time,
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* so that we can disassociate the Request on failure and release ownership
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* back to the caller.
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*/
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if (!FspIoqPostIrp(&FsvrtDeviceExtension->Ioq, Irp))
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{
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/* this can only happen if the Ioq was stopped */
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ASSERT(FspIoqStopped(&FsvrtDeviceExtension->Ioq));
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Request->Hint = 0;
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FspIrpRequest(Irp) = 0;
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Result = STATUS_CANCELLED;
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goto exit;
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}
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Result = STATUS_PENDING;
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exit:;
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}
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finally
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{
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FspDeviceRelease(FsvrtDeviceObject);
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}
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}
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break;
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}
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return Result;
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}
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VOID FspFsvolInternalDeviceControlComplete(
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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("%s", IoctlCodeSym(IrpSp->Parameters.DeviceIoControl.IoControlCode));
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}
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NTSTATUS FspInternalDeviceControl(
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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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ASSERT(IRP_MJ_INTERNAL_DEVICE_CONTROL == IrpSp->MajorFunction);
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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 = FspFsvolInternalDeviceControl(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("%s", IoctlCodeSym(IrpSp->Parameters.DeviceIoControl.IoControlCode));
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}
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