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[NTOS:PNP]

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- If PFN tracing is enabled, create a device object that allows the user to trigger a PFN dump (e.g. via "type \\.\Global\GLOBALROOT\Device\PfnDump")

svn path=/trunk/; revision=75103
This commit is contained in:
Thomas Faber 2017-06-18 19:48:45 +00:00
parent cd7d2a507c
commit 220e2a29b0
1 changed files with 56 additions and 0 deletions
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56
reactos/ntoskrnl/io/pnpmgr/pnproot.c
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@ -1344,19 +1344,75 @@ PnpRootAddDevice(
return STATUS_SUCCESS;
}
#if MI_TRACE_PFNS
PDEVICE_OBJECT IopPfnDumpDeviceObject;
NTSTATUS NTAPI
PnpRootCreateClose(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp)
{
PIO_STACK_LOCATION IoStack;
if (DeviceObject != IopPfnDumpDeviceObject)
{
Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_INVALID_DEVICE_REQUEST;
}
IoStack = IoGetCurrentIrpStackLocation(Irp);
if (IoStack->MajorFunction == IRP_MJ_CREATE)
{
MmDumpArmPfnDatabase(TRUE);
}
Irp->IoStatus.Status = STATUS_SUCCESS;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;
}
#endif
NTSTATUS NTAPI
PnpRootDriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath)
{
#if MI_TRACE_PFNS
NTSTATUS Status;
UNICODE_STRING PfnDumpDeviceName = RTL_CONSTANT_STRING(L"\\Device\\PfnDump");
#endif
DPRINT("PnpRootDriverEntry(%p %wZ)\n", DriverObject, RegistryPath);
IopRootDriverObject = DriverObject;
DriverObject->DriverExtension->AddDevice = PnpRootAddDevice;
#if MI_TRACE_PFNS
DriverObject->MajorFunction[IRP_MJ_CREATE] = PnpRootCreateClose;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = PnpRootCreateClose;
#endif
DriverObject->MajorFunction[IRP_MJ_PNP] = PnpRootPnpControl;
DriverObject->MajorFunction[IRP_MJ_POWER] = PnpRootPowerControl;
#if MI_TRACE_PFNS
Status = IoCreateDevice(DriverObject,
0,
&PfnDumpDeviceName,
FILE_DEVICE_UNKNOWN,
0,
FALSE,
&IopPfnDumpDeviceObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("Creating PFN Dump device failed with %lx\n", Status);
}
else
{
IopPfnDumpDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
}
#endif
return STATUS_SUCCESS;
}