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[NTOS:PNP] IopInitializeDevice: Create a device, allocate a device node and attach it to the root node

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This commit is contained in:
Eric Kohl
2022-04-27 21:52:21 +02:00
parent 03c8832a77
commit de316477b9
1 changed files with 32 additions and 2 deletions
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34
ntoskrnl/io/pnpmgr/plugplay.c
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@@ -194,6 +194,7 @@ IopInitializeDevice(
{ {
UNICODE_STRING DeviceInstance; UNICODE_STRING DeviceInstance;
PDEVICE_OBJECT DeviceObject; PDEVICE_OBJECT DeviceObject;
PDEVICE_NODE DeviceNode;
NTSTATUS Status = STATUS_SUCCESS; NTSTATUS Status = STATUS_SUCCESS;
DPRINT("IopInitializeDevice(%p)\n", ControlData); DPRINT("IopInitializeDevice(%p)\n", ControlData);
@@ -210,7 +211,7 @@ IopInitializeDevice(
DeviceObject = IopGetDeviceObjectFromDeviceInstance(&DeviceInstance); DeviceObject = IopGetDeviceObjectFromDeviceInstance(&DeviceInstance);
if (DeviceInstance.Buffer != NULL) if (DeviceInstance.Buffer != NULL)
{ {
DPRINT("Device %wZ already exists!\n", &DeviceInstance); DPRINT1("Device %wZ already exists!\n", &DeviceInstance);
Status = STATUS_SUCCESS; Status = STATUS_SUCCESS;
goto done; goto done;
} }
@@ -219,7 +220,36 @@ IopInitializeDevice(
DPRINT("Device %wZ does not exist!\n", &DeviceInstance); DPRINT("Device %wZ does not exist!\n", &DeviceInstance);
/* FIXME: Create a device node for the device instan*/ /* Create a device node for the device instance */
Status = IoCreateDevice(IopRootDriverObject,
0,
NULL,
FILE_DEVICE_CONTROLLER,
FILE_AUTOGENERATED_DEVICE_NAME,
FALSE,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("IoCreateDevice() failed (Status 0x%08lx)\n", Status);
goto done;
}
/* Allocate a new device node */
DeviceNode = PipAllocateDeviceNode(DeviceObject);
if (DeviceNode == NULL)
{
DPRINT1("Failed to allocate a device node!\n");
IoDeleteDevice(DeviceObject);
Status = STATUS_INSUFFICIENT_RESOURCES;
goto done;
}
/* Set the device instance of the device node */
RtlDuplicateUnicodeString(0, &DeviceInstance, &DeviceNode->InstancePath);
/* Insert as a root enumerated device node */
PiInsertDevNode(DeviceNode, IopRootDeviceNode);
done: done:
ExFreePool(DeviceInstance.Buffer); ExFreePool(DeviceInstance.Buffer);