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reactos/ntoskrnl/io/pnpmgr/devaction.c
Victor Perevertkin 2839c85092
[NTOS:IO] Enumerate devices only inside the PipDeviceActionWorker 
Introduce the PiPerformSyncDeviceAction routine for queuing
synchronous device actions
Change all kernel code to use PiPerformSyncDeviceAction and
PiQueueDeviceAction for device enumeration

CORE-10456
2020-08-21 08:02:26 +03:00

2492 lines
74 KiB
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/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
* PURPOSE: PnP manager device manipulation functions
* COPYRIGHT: Casper S. Hornstrup (chorns@users.sourceforge.net)
* 2007 Hervé Poussineau (hpoussin@reactos.org)
* 2014-2017 Thomas Faber (thomas.faber@reactos.org)
* 2020 Victor Perevertkin (victor.perevertkin@reactos.org)
*/
/* Device tree is a resource shared among all system services: hal, kernel, drivers etc.
* Thus all code which interacts with the tree needs to be synchronized.
* Here it's done via a list of DEVICE_ACTION_REQUEST structures, which represents
* the device action queue. It is being processed exclusively by the PipDeviceActionWorker.
*
* Operation queuing can be done with the PiQueueDeviceAction function or with
* the PiPerfomSyncDeviceAction for synchronous operations.
* All device manipulation like starting, removing, enumeration (see DEVICE_ACTION enum)
* have to be done with the PiQueueDeviceAction in order to avoid race conditions.
*
* Note: there is one special operation here - PiActionEnumRootDevices. It is meant to be done
* during initialization process (and be the first device tree operation executed) and
* is always executed synchronously.
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* GLOBALS *******************************************************************/
extern ERESOURCE IopDriverLoadResource;
extern BOOLEAN PnpSystemInit;
extern PDEVICE_NODE IopRootDeviceNode;
extern BOOLEAN PnPBootDriversLoaded;
#define MAX_DEVICE_ID_LEN 200
#define MAX_SEPARATORS_INSTANCEID 0
#define MAX_SEPARATORS_DEVICEID 1
/* DATA **********************************************************************/
LIST_ENTRY IopDeviceActionRequestList;
WORK_QUEUE_ITEM IopDeviceActionWorkItem;
BOOLEAN IopDeviceActionInProgress;
KSPIN_LOCK IopDeviceActionLock;
KEVENT PiEnumerationFinished;
/* TYPES *********************************************************************/
typedef struct _DEVICE_ACTION_REQUEST
{
LIST_ENTRY RequestListEntry;
PDEVICE_OBJECT DeviceObject;
PKEVENT CompletionEvent;
NTSTATUS *CompletionStatus;
DEVICE_ACTION Action;
} DEVICE_ACTION_REQUEST, *PDEVICE_ACTION_REQUEST;
/* FUNCTIONS *****************************************************************/
PDEVICE_OBJECT
IopGetDeviceObjectFromDeviceInstance(PUNICODE_STRING DeviceInstance);
NTSTATUS
IopGetParentIdPrefix(PDEVICE_NODE DeviceNode, PUNICODE_STRING ParentIdPrefix);
USHORT
NTAPI
IopGetBusTypeGuidIndex(LPGUID BusTypeGuid);
NTSTATUS
IopSetDeviceInstanceData(HANDLE InstanceKey, PDEVICE_NODE DeviceNode);
VOID
NTAPI
IopInstallCriticalDevice(PDEVICE_NODE DeviceNode);
static
VOID
IopCancelPrepareDeviceForRemoval(PDEVICE_OBJECT DeviceObject);
static
NTSTATUS
IopPrepareDeviceForRemoval(PDEVICE_OBJECT DeviceObject, BOOLEAN Force);
static
BOOLEAN
IopValidateID(
_In_ PWCHAR Id,
_In_ BUS_QUERY_ID_TYPE QueryType)
{
PWCHAR PtrChar;
PWCHAR StringEnd;
WCHAR Char;
ULONG SeparatorsCount = 0;
PWCHAR PtrPrevChar = NULL;
ULONG MaxSeparators;
BOOLEAN IsMultiSz;
PAGED_CODE();
switch (QueryType)
{
case BusQueryDeviceID:
MaxSeparators = MAX_SEPARATORS_DEVICEID;
IsMultiSz = FALSE;
break;
case BusQueryInstanceID:
MaxSeparators = MAX_SEPARATORS_INSTANCEID;
IsMultiSz = FALSE;
break;
case BusQueryHardwareIDs:
case BusQueryCompatibleIDs:
MaxSeparators = MAX_SEPARATORS_DEVICEID;
IsMultiSz = TRUE;
break;
default:
DPRINT1("IopValidateID: Not handled QueryType - %x\n", QueryType);
return FALSE;
}
StringEnd = Id + MAX_DEVICE_ID_LEN;
for (PtrChar = Id; PtrChar < StringEnd; PtrChar++)
{
Char = *PtrChar;
if (Char == UNICODE_NULL)
{
if (!IsMultiSz || (PtrPrevChar && PtrChar == PtrPrevChar + 1))
{
if (MaxSeparators == SeparatorsCount || IsMultiSz)
{
return TRUE;
}
DPRINT1("IopValidateID: SeparatorsCount - %lu, MaxSeparators - %lu\n",
SeparatorsCount, MaxSeparators);
goto ErrorExit;
}
StringEnd = PtrChar + MAX_DEVICE_ID_LEN + 1;
PtrPrevChar = PtrChar;
SeparatorsCount = 0;
}
else if (Char < ' ' || Char > 0x7F || Char == ',')
{
DPRINT1("IopValidateID: Invalid character - %04X\n", Char);
goto ErrorExit;
}
else if (Char == ' ')
{
*PtrChar = '_';
}
else if (Char == '\\')
{
SeparatorsCount++;
if (SeparatorsCount > MaxSeparators)
{
DPRINT1("IopValidateID: SeparatorsCount - %lu, MaxSeparators - %lu\n",
SeparatorsCount, MaxSeparators);
goto ErrorExit;
}
}
}
DPRINT1("IopValidateID: Not terminated ID\n");
ErrorExit:
// FIXME logging
return FALSE;
}
static
NTSTATUS
IopCreateDeviceInstancePath(
_In_ PDEVICE_NODE DeviceNode,
_Out_ PUNICODE_STRING InstancePath)
{
IO_STATUS_BLOCK IoStatusBlock;
UNICODE_STRING DeviceId;
UNICODE_STRING InstanceId;
IO_STACK_LOCATION Stack;
NTSTATUS Status;
UNICODE_STRING ParentIdPrefix = { 0, 0, NULL };
DEVICE_CAPABILITIES DeviceCapabilities;
BOOLEAN IsValidID;
DPRINT("Sending IRP_MN_QUERY_ID.BusQueryDeviceID to device stack\n");
Stack.Parameters.QueryId.IdType = BusQueryDeviceID;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_ID,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopInitiatePnpIrp(BusQueryDeviceID) failed (Status %x)\n", Status);
return Status;
}
IsValidID = IopValidateID((PWCHAR)IoStatusBlock.Information, BusQueryDeviceID);
if (!IsValidID)
{
DPRINT1("Invalid DeviceID. DeviceNode - %p\n", DeviceNode);
}
/* Save the device id string */
RtlInitUnicodeString(&DeviceId, (PWSTR)IoStatusBlock.Information);
DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after enumeration)\n");
Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopQueryDeviceCapabilities() failed (Status 0x%08lx)\n", Status);
RtlFreeUnicodeString(&DeviceId);
return Status;
}
/* This bit is only check after enumeration */
if (DeviceCapabilities.HardwareDisabled)
{
/* FIXME: Cleanup device */
DeviceNode->Flags |= DNF_DISABLED;
RtlFreeUnicodeString(&DeviceId);
return STATUS_PLUGPLAY_NO_DEVICE;
}
else
{
DeviceNode->Flags &= ~DNF_DISABLED;
}
if (!DeviceCapabilities.UniqueID)
{
/* Device has not a unique ID. We need to prepend parent bus unique identifier */
DPRINT("Instance ID is not unique\n");
Status = IopGetParentIdPrefix(DeviceNode, &ParentIdPrefix);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopGetParentIdPrefix() failed (Status 0x%08lx)\n", Status);
RtlFreeUnicodeString(&DeviceId);
return Status;
}
}
DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_ID,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp(BusQueryInstanceID) failed (Status %lx)\n", Status);
ASSERT(IoStatusBlock.Information == 0);
}
if (IoStatusBlock.Information)
{
IsValidID = IopValidateID((PWCHAR)IoStatusBlock.Information, BusQueryInstanceID);
if (!IsValidID)
{
DPRINT1("Invalid InstanceID. DeviceNode - %p\n", DeviceNode);
}
}
RtlInitUnicodeString(&InstanceId,
(PWSTR)IoStatusBlock.Information);
InstancePath->Length = 0;
InstancePath->MaximumLength = DeviceId.Length + sizeof(WCHAR) +
ParentIdPrefix.Length +
InstanceId.Length +
sizeof(UNICODE_NULL);
if (ParentIdPrefix.Length && InstanceId.Length)
{
InstancePath->MaximumLength += sizeof(WCHAR);
}
InstancePath->Buffer = ExAllocatePoolWithTag(PagedPool,
InstancePath->MaximumLength,
TAG_IO);
if (!InstancePath->Buffer)
{
RtlFreeUnicodeString(&InstanceId);
RtlFreeUnicodeString(&ParentIdPrefix);
RtlFreeUnicodeString(&DeviceId);
return STATUS_INSUFFICIENT_RESOURCES;
}
/* Start with the device id */
RtlCopyUnicodeString(InstancePath, &DeviceId);
RtlAppendUnicodeToString(InstancePath, L"\\");
/* Add information from parent bus device to InstancePath */
RtlAppendUnicodeStringToString(InstancePath, &ParentIdPrefix);
if (ParentIdPrefix.Length && InstanceId.Length)
{
RtlAppendUnicodeToString(InstancePath, L"&");
}
/* Finally, add the id returned by the driver stack */
RtlAppendUnicodeStringToString(InstancePath, &InstanceId);
/*
* FIXME: Check for valid characters, if there is invalid characters
* then bugcheck
*/
RtlFreeUnicodeString(&InstanceId);
RtlFreeUnicodeString(&DeviceId);
RtlFreeUnicodeString(&ParentIdPrefix);
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
IopQueryDeviceCapabilities(PDEVICE_NODE DeviceNode,
PDEVICE_CAPABILITIES DeviceCaps)
{
IO_STATUS_BLOCK StatusBlock;
IO_STACK_LOCATION Stack;
NTSTATUS Status;
HANDLE InstanceKey;
UNICODE_STRING ValueName;
/* Set up the Header */
RtlZeroMemory(DeviceCaps, sizeof(DEVICE_CAPABILITIES));
DeviceCaps->Size = sizeof(DEVICE_CAPABILITIES);
DeviceCaps->Version = 1;
DeviceCaps->Address = -1;
DeviceCaps->UINumber = -1;
/* Set up the Stack */
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.Parameters.DeviceCapabilities.Capabilities = DeviceCaps;
/* Send the IRP */
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&StatusBlock,
IRP_MN_QUERY_CAPABILITIES,
&Stack);
if (!NT_SUCCESS(Status))
{
if (Status != STATUS_NOT_SUPPORTED)
{
DPRINT1("IRP_MN_QUERY_CAPABILITIES failed with status 0x%lx\n", Status);
}
return Status;
}
/* Map device capabilities to capability flags */
DeviceNode->CapabilityFlags = 0;
if (DeviceCaps->LockSupported)
DeviceNode->CapabilityFlags |= 0x00000001; // CM_DEVCAP_LOCKSUPPORTED
if (DeviceCaps->EjectSupported)
DeviceNode->CapabilityFlags |= 0x00000002; // CM_DEVCAP_EJECTSUPPORTED
if (DeviceCaps->Removable)
DeviceNode->CapabilityFlags |= 0x00000004; // CM_DEVCAP_REMOVABLE
if (DeviceCaps->DockDevice)
DeviceNode->CapabilityFlags |= 0x00000008; // CM_DEVCAP_DOCKDEVICE
if (DeviceCaps->UniqueID)
DeviceNode->CapabilityFlags |= 0x00000010; // CM_DEVCAP_UNIQUEID
if (DeviceCaps->SilentInstall)
DeviceNode->CapabilityFlags |= 0x00000020; // CM_DEVCAP_SILENTINSTALL
if (DeviceCaps->RawDeviceOK)
DeviceNode->CapabilityFlags |= 0x00000040; // CM_DEVCAP_RAWDEVICEOK
if (DeviceCaps->SurpriseRemovalOK)
DeviceNode->CapabilityFlags |= 0x00000080; // CM_DEVCAP_SURPRISEREMOVALOK
if (DeviceCaps->HardwareDisabled)
DeviceNode->CapabilityFlags |= 0x00000100; // CM_DEVCAP_HARDWAREDISABLED
if (DeviceCaps->NonDynamic)
DeviceNode->CapabilityFlags |= 0x00000200; // CM_DEVCAP_NONDYNAMIC
if (DeviceCaps->NoDisplayInUI)
DeviceNode->UserFlags |= DNUF_DONT_SHOW_IN_UI;
else
DeviceNode->UserFlags &= ~DNUF_DONT_SHOW_IN_UI;
Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, REG_OPTION_NON_VOLATILE, &InstanceKey);
if (NT_SUCCESS(Status))
{
/* Set 'Capabilities' value */
RtlInitUnicodeString(&ValueName, L"Capabilities");
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_DWORD,
&DeviceNode->CapabilityFlags,
sizeof(ULONG));
/* Set 'UINumber' value */
if (DeviceCaps->UINumber != MAXULONG)
{
RtlInitUnicodeString(&ValueName, L"UINumber");
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_DWORD,
&DeviceCaps->UINumber,
sizeof(ULONG));
}
ZwClose(InstanceKey);
}
return Status;
}
static
NTSTATUS
IopQueryHardwareIds(PDEVICE_NODE DeviceNode,
HANDLE InstanceKey)
{
IO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatusBlock;
PWSTR Ptr;
UNICODE_STRING ValueName;
NTSTATUS Status;
ULONG Length, TotalLength;
BOOLEAN IsValidID;
DPRINT("Sending IRP_MN_QUERY_ID.BusQueryHardwareIDs to device stack\n");
RtlZeroMemory(&Stack, sizeof(Stack));
Stack.Parameters.QueryId.IdType = BusQueryHardwareIDs;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_ID,
&Stack);
if (NT_SUCCESS(Status))
{
IsValidID = IopValidateID((PWCHAR)IoStatusBlock.Information, BusQueryHardwareIDs);
if (!IsValidID)
{
DPRINT1("Invalid HardwareIDs. DeviceNode - %p\n", DeviceNode);
}
TotalLength = 0;
Ptr = (PWSTR)IoStatusBlock.Information;
DPRINT("Hardware IDs:\n");
while (*Ptr)
{
DPRINT(" %S\n", Ptr);
Length = (ULONG)wcslen(Ptr) + 1;
Ptr += Length;
TotalLength += Length;
}
DPRINT("TotalLength: %hu\n", TotalLength);
DPRINT("\n");
RtlInitUnicodeString(&ValueName, L"HardwareID");
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_MULTI_SZ,
(PVOID)IoStatusBlock.Information,
(TotalLength + 1) * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwSetValueKey() failed (Status %lx)\n", Status);
}
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
}
return Status;
}
static
NTSTATUS
IopQueryCompatibleIds(PDEVICE_NODE DeviceNode,
HANDLE InstanceKey)
{
IO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatusBlock;
PWSTR Ptr;
UNICODE_STRING ValueName;
NTSTATUS Status;
ULONG Length, TotalLength;
BOOLEAN IsValidID;
DPRINT("Sending IRP_MN_QUERY_ID.BusQueryCompatibleIDs to device stack\n");
RtlZeroMemory(&Stack, sizeof(Stack));
Stack.Parameters.QueryId.IdType = BusQueryCompatibleIDs;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_ID,
&Stack);
if (NT_SUCCESS(Status) && IoStatusBlock.Information)
{
IsValidID = IopValidateID((PWCHAR)IoStatusBlock.Information, BusQueryCompatibleIDs);
if (!IsValidID)
{
DPRINT1("Invalid CompatibleIDs. DeviceNode - %p\n", DeviceNode);
}
TotalLength = 0;
Ptr = (PWSTR)IoStatusBlock.Information;
DPRINT("Compatible IDs:\n");
while (*Ptr)
{
DPRINT(" %S\n", Ptr);
Length = (ULONG)wcslen(Ptr) + 1;
Ptr += Length;
TotalLength += Length;
}
DPRINT("TotalLength: %hu\n", TotalLength);
DPRINT("\n");
RtlInitUnicodeString(&ValueName, L"CompatibleIDs");
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_MULTI_SZ,
(PVOID)IoStatusBlock.Information,
(TotalLength + 1) * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwSetValueKey() failed (Status %lx) or no Compatible ID returned\n", Status);
}
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
}
return Status;
}
/*
* IopActionInterrogateDeviceStack
*
* Retrieve information for all (direct) child nodes of a parent node.
*
* Parameters
* DeviceNode
* Pointer to device node.
* Context
* Pointer to parent node to retrieve child node information for.
*
* Remarks
* Any errors that occur are logged instead so that all child services have a chance
* of being interrogated.
*/
NTSTATUS
IopActionInterrogateDeviceStack(PDEVICE_NODE DeviceNode,
PVOID Context)
{
IO_STATUS_BLOCK IoStatusBlock;
PWSTR DeviceDescription;
PWSTR LocationInformation;
PDEVICE_NODE ParentDeviceNode;
IO_STACK_LOCATION Stack;
NTSTATUS Status;
ULONG RequiredLength;
LCID LocaleId;
HANDLE InstanceKey = NULL;
UNICODE_STRING ValueName;
UNICODE_STRING InstancePathU;
PDEVICE_OBJECT OldDeviceObject;
DPRINT("IopActionInterrogateDeviceStack(%p, %p)\n", DeviceNode, Context);
DPRINT("PDO 0x%p\n", DeviceNode->PhysicalDeviceObject);
ParentDeviceNode = (PDEVICE_NODE)Context;
/*
* We are called for the parent too, but we don't need to do special
* handling for this node
*/
if (DeviceNode == ParentDeviceNode)
{
DPRINT("Success\n");
return STATUS_SUCCESS;
}
/*
* Make sure this device node is a direct child of the parent device node
* that is given as an argument
*/
if (DeviceNode->Parent != ParentDeviceNode)
{
DPRINT("Skipping 2+ level child\n");
return STATUS_SUCCESS;
}
/* Skip processing if it was already completed before */
if (DeviceNode->Flags & DNF_PROCESSED)
{
/* Nothing to do */
return STATUS_SUCCESS;
}
/* Get Locale ID */
Status = ZwQueryDefaultLocale(FALSE, &LocaleId);
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwQueryDefaultLocale() failed with status 0x%lx\n", Status);
return Status;
}
/*
* FIXME: For critical errors, cleanup and disable device, but always
* return STATUS_SUCCESS.
*/
Status = IopCreateDeviceInstancePath(DeviceNode, &InstancePathU);
if (!NT_SUCCESS(Status))
{
if (Status != STATUS_PLUGPLAY_NO_DEVICE)
{
DPRINT1("IopCreateDeviceInstancePath() failed with status 0x%lx\n", Status);
}
/* We have to return success otherwise we abort the traverse operation */
return STATUS_SUCCESS;
}
/* Verify that this is not a duplicate */
OldDeviceObject = IopGetDeviceObjectFromDeviceInstance(&InstancePathU);
if (OldDeviceObject != NULL)
{
PDEVICE_NODE OldDeviceNode = IopGetDeviceNode(OldDeviceObject);
DPRINT1("Duplicate device instance '%wZ'\n", &InstancePathU);
DPRINT1("Current instance parent: '%wZ'\n", &DeviceNode->Parent->InstancePath);
DPRINT1("Old instance parent: '%wZ'\n", &OldDeviceNode->Parent->InstancePath);
KeBugCheckEx(PNP_DETECTED_FATAL_ERROR,
0x01,
(ULONG_PTR)DeviceNode->PhysicalDeviceObject,
(ULONG_PTR)OldDeviceObject,
0);
}
DeviceNode->InstancePath = InstancePathU;
DPRINT("InstancePath is %S\n", DeviceNode->InstancePath.Buffer);
/*
* Create registry key for the instance id, if it doesn't exist yet
*/
Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, REG_OPTION_NON_VOLATILE, &InstanceKey);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to create the instance key! (Status %lx)\n", Status);
/* We have to return success otherwise we abort the traverse operation */
return STATUS_SUCCESS;
}
IopQueryHardwareIds(DeviceNode, InstanceKey);
IopQueryCompatibleIds(DeviceNode, InstanceKey);
DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextDescription to device stack\n");
Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextDescription;
Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_TEXT,
&Stack);
DeviceDescription = NT_SUCCESS(Status) ? (PWSTR)IoStatusBlock.Information
: NULL;
/* This key is mandatory, so even if the Irp fails, we still write it */
RtlInitUnicodeString(&ValueName, L"DeviceDesc");
if (ZwQueryValueKey(InstanceKey, &ValueName, KeyValueBasicInformation, NULL, 0, &RequiredLength) == STATUS_OBJECT_NAME_NOT_FOUND)
{
if (DeviceDescription &&
*DeviceDescription != UNICODE_NULL)
{
/* This key is overriden when a driver is installed. Don't write the
* new description if another one already exists */
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_SZ,
DeviceDescription,
((ULONG)wcslen(DeviceDescription) + 1) * sizeof(WCHAR));
}
else
{
UNICODE_STRING DeviceDesc = RTL_CONSTANT_STRING(L"Unknown device");
DPRINT("Driver didn't return DeviceDesc (Status 0x%08lx), so place unknown device there\n", Status);
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_SZ,
DeviceDesc.Buffer,
DeviceDesc.MaximumLength);
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwSetValueKey() failed (Status 0x%lx)\n", Status);
}
}
}
if (DeviceDescription)
{
ExFreePoolWithTag(DeviceDescription, 0);
}
DPRINT("Sending IRP_MN_QUERY_DEVICE_TEXT.DeviceTextLocation to device stack\n");
Stack.Parameters.QueryDeviceText.DeviceTextType = DeviceTextLocationInformation;
Stack.Parameters.QueryDeviceText.LocaleId = LocaleId;
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_TEXT,
&Stack);
if (NT_SUCCESS(Status) && IoStatusBlock.Information)
{
LocationInformation = (PWSTR)IoStatusBlock.Information;
DPRINT("LocationInformation: %S\n", LocationInformation);
RtlInitUnicodeString(&ValueName, L"LocationInformation");
Status = ZwSetValueKey(InstanceKey,
&ValueName,
0,
REG_SZ,
LocationInformation,
((ULONG)wcslen(LocationInformation) + 1) * sizeof(WCHAR));
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwSetValueKey() failed (Status %lx)\n", Status);
}
ExFreePoolWithTag(LocationInformation, 0);
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
}
DPRINT("Sending IRP_MN_QUERY_BUS_INFORMATION to device stack\n");
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_BUS_INFORMATION,
NULL);
if (NT_SUCCESS(Status) && IoStatusBlock.Information)
{
PPNP_BUS_INFORMATION BusInformation = (PPNP_BUS_INFORMATION)IoStatusBlock.Information;
DeviceNode->ChildBusNumber = BusInformation->BusNumber;
DeviceNode->ChildInterfaceType = BusInformation->LegacyBusType;
DeviceNode->ChildBusTypeIndex = IopGetBusTypeGuidIndex(&BusInformation->BusTypeGuid);
ExFreePoolWithTag(BusInformation, 0);
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
DeviceNode->ChildBusNumber = 0xFFFFFFF0;
DeviceNode->ChildInterfaceType = InterfaceTypeUndefined;
DeviceNode->ChildBusTypeIndex = -1;
}
DPRINT("Sending IRP_MN_QUERY_RESOURCES to device stack\n");
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_RESOURCES,
NULL);
if (NT_SUCCESS(Status) && IoStatusBlock.Information)
{
DeviceNode->BootResources = (PCM_RESOURCE_LIST)IoStatusBlock.Information;
IopDeviceNodeSetFlag(DeviceNode, DNF_HAS_BOOT_CONFIG);
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
DeviceNode->BootResources = NULL;
}
DPRINT("Sending IRP_MN_QUERY_RESOURCE_REQUIREMENTS to device stack\n");
Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_RESOURCE_REQUIREMENTS,
NULL);
if (NT_SUCCESS(Status))
{
DeviceNode->ResourceRequirements = (PIO_RESOURCE_REQUIREMENTS_LIST)IoStatusBlock.Information;
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %08lx)\n", Status);
DeviceNode->ResourceRequirements = NULL;
}
if (InstanceKey != NULL)
{
IopSetDeviceInstanceData(InstanceKey, DeviceNode);
}
ZwClose(InstanceKey);
IopDeviceNodeSetFlag(DeviceNode, DNF_PROCESSED);
if (!IopDeviceNodeHasFlag(DeviceNode, DNF_LEGACY_DRIVER))
{
/* Report the device to the user-mode pnp manager */
IopQueueTargetDeviceEvent(&GUID_DEVICE_ENUMERATED,
&DeviceNode->InstancePath);
}
return STATUS_SUCCESS;
}
/*
* IopActionConfigureChildServices
*
* Retrieve configuration for all (direct) child nodes of a parent node.
*
* Parameters
* DeviceNode
* Pointer to device node.
* Context
* Pointer to parent node to retrieve child node configuration for.
*
* Remarks
* Any errors that occur are logged instead so that all child services have a chance of beeing
* configured.
*/
NTSTATUS
IopActionConfigureChildServices(PDEVICE_NODE DeviceNode,
PVOID Context)
{
RTL_QUERY_REGISTRY_TABLE QueryTable[3];
PDEVICE_NODE ParentDeviceNode;
PUNICODE_STRING Service;
UNICODE_STRING ClassGUID;
NTSTATUS Status;
DEVICE_CAPABILITIES DeviceCaps;
DPRINT("IopActionConfigureChildServices(%p, %p)\n", DeviceNode, Context);
ParentDeviceNode = (PDEVICE_NODE)Context;
/*
* We are called for the parent too, but we don't need to do special
* handling for this node
*/
if (DeviceNode == ParentDeviceNode)
{
DPRINT("Success\n");
return STATUS_SUCCESS;
}
/*
* Make sure this device node is a direct child of the parent device node
* that is given as an argument
*/
if (DeviceNode->Parent != ParentDeviceNode)
{
DPRINT("Skipping 2+ level child\n");
return STATUS_SUCCESS;
}
if (!(DeviceNode->Flags & DNF_PROCESSED))
{
DPRINT1("Child not ready to be configured\n");
return STATUS_SUCCESS;
}
if (!(DeviceNode->Flags & (DNF_DISABLED | DNF_STARTED | DNF_ADDED)))
{
UNICODE_STRING RegKey;
/* Install the service for this if it's in the CDDB */
IopInstallCriticalDevice(DeviceNode);
/*
* Retrieve configuration from Enum key
*/
Service = &DeviceNode->ServiceName;
RtlZeroMemory(QueryTable, sizeof(QueryTable));
RtlInitUnicodeString(Service, NULL);
RtlInitUnicodeString(&ClassGUID, NULL);
QueryTable[0].Name = L"Service";
QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[0].EntryContext = Service;
QueryTable[1].Name = L"ClassGUID";
QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[1].EntryContext = &ClassGUID;
QueryTable[1].DefaultType = REG_SZ;
QueryTable[1].DefaultData = L"";
QueryTable[1].DefaultLength = 0;
RegKey.Length = 0;
RegKey.MaximumLength = sizeof(ENUM_ROOT) + sizeof(WCHAR) + DeviceNode->InstancePath.Length;
RegKey.Buffer = ExAllocatePoolWithTag(PagedPool,
RegKey.MaximumLength,
TAG_IO);
if (RegKey.Buffer == NULL)
{
IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlAppendUnicodeToString(&RegKey, ENUM_ROOT);
RtlAppendUnicodeToString(&RegKey, L"\\");
RtlAppendUnicodeStringToString(&RegKey, &DeviceNode->InstancePath);
Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
RegKey.Buffer, QueryTable, NULL, NULL);
ExFreePoolWithTag(RegKey.Buffer, TAG_IO);
if (!NT_SUCCESS(Status))
{
/* FIXME: Log the error */
DPRINT("Could not retrieve configuration for device %wZ (Status 0x%08x)\n",
&DeviceNode->InstancePath, Status);
IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
return STATUS_SUCCESS;
}
if (Service->Buffer == NULL)
{
if (NT_SUCCESS(IopQueryDeviceCapabilities(DeviceNode, &DeviceCaps)) &&
DeviceCaps.RawDeviceOK)
{
DPRINT("%wZ is using parent bus driver (%wZ)\n", &DeviceNode->InstancePath, &ParentDeviceNode->ServiceName);
RtlInitEmptyUnicodeString(&DeviceNode->ServiceName, NULL, 0);
}
else if (ClassGUID.Length != 0)
{
/* Device has a ClassGUID value, but no Service value.
* Suppose it is using the NULL driver, so state the
* device is started */
DPRINT("%wZ is using NULL driver\n", &DeviceNode->InstancePath);
IopDeviceNodeSetFlag(DeviceNode, DNF_STARTED);
}
else
{
DeviceNode->Problem = CM_PROB_FAILED_INSTALL;
IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
}
return STATUS_SUCCESS;
}
DPRINT("Got Service %S\n", Service->Buffer);
}
return STATUS_SUCCESS;
}
/*
* IopActionInitChildServices
*
* Initialize the service for all (direct) child nodes of a parent node
*
* Parameters
* DeviceNode
* Pointer to device node.
* Context
* Pointer to parent node to initialize child node services for.
*
* Remarks
* If the driver image for a service is not loaded and initialized
* it is done here too. Any errors that occur are logged instead so
* that all child services have a chance of being initialized.
*/
NTSTATUS
IopActionInitChildServices(PDEVICE_NODE DeviceNode,
PVOID Context)
{
PDEVICE_NODE ParentDeviceNode;
NTSTATUS Status;
BOOLEAN BootDrivers = !PnpSystemInit;
DPRINT("IopActionInitChildServices(%p, %p)\n", DeviceNode, Context);
ParentDeviceNode = Context;
/*
* We are called for the parent too, but we don't need to do special
* handling for this node
*/
if (DeviceNode == ParentDeviceNode)
{
DPRINT("Success\n");
return STATUS_SUCCESS;
}
/*
* We don't want to check for a direct child because
* this function is called during boot to reinitialize
* devices with drivers that couldn't load yet due to
* stage 0 limitations (ie can't load from disk yet).
*/
if (!(DeviceNode->Flags & DNF_PROCESSED))
{
DPRINT1("Child not ready to be added\n");
return STATUS_SUCCESS;
}
if (IopDeviceNodeHasFlag(DeviceNode, DNF_STARTED) ||
IopDeviceNodeHasFlag(DeviceNode, DNF_ADDED) ||
IopDeviceNodeHasFlag(DeviceNode, DNF_DISABLED))
return STATUS_SUCCESS;
if (DeviceNode->ServiceName.Buffer == NULL)
{
/* We don't need to worry about loading the driver because we're
* being driven in raw mode so our parent must be loaded to get here */
Status = IopInitializeDevice(DeviceNode, NULL);
if (NT_SUCCESS(Status))
{
Status = IopStartDevice(DeviceNode);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopStartDevice(%wZ) failed with status 0x%08x\n",
&DeviceNode->InstancePath, Status);
}
}
}
else
{
PLDR_DATA_TABLE_ENTRY ModuleObject;
PDRIVER_OBJECT DriverObject;
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite(&IopDriverLoadResource, TRUE);
/* Get existing DriverObject pointer (in case the driver has
already been loaded and initialized) */
Status = IopGetDriverObject(
&DriverObject,
&DeviceNode->ServiceName,
FALSE);
if (!NT_SUCCESS(Status))
{
/* Driver is not initialized, try to load it */
Status = IopLoadServiceModule(&DeviceNode->ServiceName, &ModuleObject);
if (NT_SUCCESS(Status) || Status == STATUS_IMAGE_ALREADY_LOADED)
{
/* Initialize the driver */
Status = IopInitializeDriverModule(DeviceNode, ModuleObject,
&DeviceNode->ServiceName, FALSE, &DriverObject);
if (!NT_SUCCESS(Status))
DeviceNode->Problem = CM_PROB_FAILED_DRIVER_ENTRY;
}
else if (Status == STATUS_DRIVER_UNABLE_TO_LOAD)
{
DPRINT1("Service '%wZ' is disabled\n", &DeviceNode->ServiceName);
DeviceNode->Problem = CM_PROB_DISABLED_SERVICE;
}
else
{
DPRINT("IopLoadServiceModule(%wZ) failed with status 0x%08x\n",
&DeviceNode->ServiceName, Status);
if (!BootDrivers)
DeviceNode->Problem = CM_PROB_DRIVER_FAILED_LOAD;
}
}
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
/* Driver is loaded and initialized at this point */
if (NT_SUCCESS(Status))
{
/* Initialize the device, including all filters */
Status = PipCallDriverAddDevice(DeviceNode, FALSE, DriverObject);
/* Remove the extra reference */
ObDereferenceObject(DriverObject);
}
else
{
/*
* Don't disable when trying to load only boot drivers
*/
if (!BootDrivers)
{
IopDeviceNodeSetFlag(DeviceNode, DNF_DISABLED);
}
}
}
return STATUS_SUCCESS;
}
static
NTSTATUS
IopSetServiceEnumData(PDEVICE_NODE DeviceNode)
{
UNICODE_STRING ServicesKeyPath = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\");
UNICODE_STRING ServiceKeyName;
UNICODE_STRING EnumKeyName;
UNICODE_STRING ValueName;
PKEY_VALUE_FULL_INFORMATION KeyValueInformation;
HANDLE ServiceKey = NULL, ServiceEnumKey = NULL;
ULONG Disposition;
ULONG Count = 0, NextInstance = 0;
WCHAR ValueBuffer[6];
NTSTATUS Status = STATUS_SUCCESS;
DPRINT("IopSetServiceEnumData(%p)\n", DeviceNode);
DPRINT("Instance: %wZ\n", &DeviceNode->InstancePath);
DPRINT("Service: %wZ\n", &DeviceNode->ServiceName);
if (DeviceNode->ServiceName.Buffer == NULL)
{
DPRINT1("No service!\n");
return STATUS_SUCCESS;
}
ServiceKeyName.MaximumLength = ServicesKeyPath.Length + DeviceNode->ServiceName.Length + sizeof(UNICODE_NULL);
ServiceKeyName.Length = 0;
ServiceKeyName.Buffer = ExAllocatePool(PagedPool, ServiceKeyName.MaximumLength);
if (ServiceKeyName.Buffer == NULL)
{
DPRINT1("No ServiceKeyName.Buffer!\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlAppendUnicodeStringToString(&ServiceKeyName, &ServicesKeyPath);
RtlAppendUnicodeStringToString(&ServiceKeyName, &DeviceNode->ServiceName);
DPRINT("ServiceKeyName: %wZ\n", &ServiceKeyName);
Status = IopOpenRegistryKeyEx(&ServiceKey, NULL, &ServiceKeyName, KEY_CREATE_SUB_KEY);
if (!NT_SUCCESS(Status))
{
goto done;
}
RtlInitUnicodeString(&EnumKeyName, L"Enum");
Status = IopCreateRegistryKeyEx(&ServiceEnumKey,
ServiceKey,
&EnumKeyName,
KEY_SET_VALUE,
REG_OPTION_VOLATILE,
&Disposition);
if (NT_SUCCESS(Status))
{
if (Disposition == REG_OPENED_EXISTING_KEY)
{
/* Read the NextInstance value */
Status = IopGetRegistryValue(ServiceEnumKey,
L"Count",
&KeyValueInformation);
if (!NT_SUCCESS(Status))
goto done;
if ((KeyValueInformation->Type == REG_DWORD) &&
(KeyValueInformation->DataLength))
{
/* Read it */
Count = *(PULONG)((ULONG_PTR)KeyValueInformation +
KeyValueInformation->DataOffset);
}
ExFreePool(KeyValueInformation);
KeyValueInformation = NULL;
/* Read the NextInstance value */
Status = IopGetRegistryValue(ServiceEnumKey,
L"NextInstance",
&KeyValueInformation);
if (!NT_SUCCESS(Status))
goto done;
if ((KeyValueInformation->Type == REG_DWORD) &&
(KeyValueInformation->DataLength))
{
NextInstance = *(PULONG)((ULONG_PTR)KeyValueInformation +
KeyValueInformation->DataOffset);
}
ExFreePool(KeyValueInformation);
KeyValueInformation = NULL;
}
/* Set the instance path */
swprintf(ValueBuffer, L"%lu", NextInstance);
RtlInitUnicodeString(&ValueName, ValueBuffer);
Status = ZwSetValueKey(ServiceEnumKey,
&ValueName,
0,
REG_SZ,
DeviceNode->InstancePath.Buffer,
DeviceNode->InstancePath.MaximumLength);
if (!NT_SUCCESS(Status))
goto done;
/* Increment Count and NextInstance */
Count++;
NextInstance++;
/* Set the new Count value */
RtlInitUnicodeString(&ValueName, L"Count");
Status = ZwSetValueKey(ServiceEnumKey,
&ValueName,
0,
REG_DWORD,
&Count,
sizeof(Count));
if (!NT_SUCCESS(Status))
goto done;
/* Set the new NextInstance value */
RtlInitUnicodeString(&ValueName, L"NextInstance");
Status = ZwSetValueKey(ServiceEnumKey,
&ValueName,
0,
REG_DWORD,
&NextInstance,
sizeof(NextInstance));
}
done:
if (ServiceEnumKey != NULL)
ZwClose(ServiceEnumKey);
if (ServiceKey != NULL)
ZwClose(ServiceKey);
ExFreePool(ServiceKeyName.Buffer);
return Status;
}
static
VOID
NTAPI
IopStartDevice2(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PDEVICE_NODE DeviceNode;
NTSTATUS Status;
PVOID Dummy;
DEVICE_CAPABILITIES DeviceCapabilities;
/* Get the device node */
DeviceNode = IopGetDeviceNode(DeviceObject);
ASSERT(!(DeviceNode->Flags & DNF_DISABLED));
/* Build the I/O stack location */
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_START_DEVICE;
Stack.Parameters.StartDevice.AllocatedResources =
DeviceNode->ResourceList;
Stack.Parameters.StartDevice.AllocatedResourcesTranslated =
DeviceNode->ResourceListTranslated;
/* Do the call */
Status = IopSynchronousCall(DeviceObject, &Stack, &Dummy);
if (!NT_SUCCESS(Status))
{
/* Send an IRP_MN_REMOVE_DEVICE request */
IopRemoveDevice(DeviceNode);
/* Set the appropriate flag */
DeviceNode->Flags |= DNF_START_FAILED;
DeviceNode->Problem = CM_PROB_FAILED_START;
DPRINT1("Warning: PnP Start failed (%wZ) [Status: 0x%x]\n", &DeviceNode->InstancePath, Status);
return;
}
DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after start)\n");
Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
}
/* Invalidate device state so IRP_MN_QUERY_PNP_DEVICE_STATE is sent */
IoInvalidateDeviceState(DeviceObject);
/* Otherwise, mark us as started */
DeviceNode->Flags |= DNF_STARTED;
DeviceNode->Flags &= ~DNF_STOPPED;
/* We now need enumeration */
DeviceNode->Flags |= DNF_NEED_ENUMERATION_ONLY;
}
static
NTSTATUS
NTAPI
IopStartAndEnumerateDevice(IN PDEVICE_NODE DeviceNode)
{
PDEVICE_OBJECT DeviceObject;
NTSTATUS Status;
PAGED_CODE();
/* Sanity check */
ASSERT((DeviceNode->Flags & DNF_ADDED));
ASSERT((DeviceNode->Flags & (DNF_RESOURCE_ASSIGNED |
DNF_RESOURCE_REPORTED |
DNF_NO_RESOURCE_REQUIRED)));
/* Get the device object */
DeviceObject = DeviceNode->PhysicalDeviceObject;
/* Check if we're not started yet */
if (!(DeviceNode->Flags & DNF_STARTED))
{
/* Start us */
IopStartDevice2(DeviceObject);
}
/* Do we need to query IDs? This happens in the case of manual reporting */
#if 0
if (DeviceNode->Flags & DNF_NEED_QUERY_IDS)
{
DPRINT1("Warning: Device node has DNF_NEED_QUERY_IDS\n");
/* And that case shouldn't happen yet */
ASSERT(FALSE);
}
#endif
IopSetServiceEnumData(DeviceNode);
/* Make sure we're started, and check if we need enumeration */
if ((DeviceNode->Flags & DNF_STARTED) &&
(DeviceNode->Flags & DNF_NEED_ENUMERATION_ONLY))
{
/* Enumerate us */
IoInvalidateDeviceRelations(DeviceObject, BusRelations);
Status = STATUS_SUCCESS;
}
else
{
/* Nothing to do */
Status = STATUS_SUCCESS;
}
/* Return */
return Status;
}
NTSTATUS
IopStartDevice(
PDEVICE_NODE DeviceNode)
{
NTSTATUS Status;
HANDLE InstanceHandle = NULL, ControlHandle = NULL;
UNICODE_STRING KeyName, ValueString;
OBJECT_ATTRIBUTES ObjectAttributes;
if (DeviceNode->Flags & DNF_DISABLED)
return STATUS_SUCCESS;
Status = IopAssignDeviceResources(DeviceNode);
if (!NT_SUCCESS(Status))
goto ByeBye;
/* New PnP ABI */
IopStartAndEnumerateDevice(DeviceNode);
/* FIX: Should be done in new device instance code */
Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, REG_OPTION_NON_VOLATILE, &InstanceHandle);
if (!NT_SUCCESS(Status))
goto ByeBye;
/* FIX: Should be done in IoXxxPrepareDriverLoading */
// {
RtlInitUnicodeString(&KeyName, L"Control");
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
InstanceHandle,
NULL);
Status = ZwCreateKey(&ControlHandle,
KEY_SET_VALUE,
&ObjectAttributes,
0,
NULL,
REG_OPTION_VOLATILE,
NULL);
if (!NT_SUCCESS(Status))
goto ByeBye;
RtlInitUnicodeString(&KeyName, L"ActiveService");
ValueString = DeviceNode->ServiceName;
if (!ValueString.Buffer)
RtlInitUnicodeString(&ValueString, L"");
Status = ZwSetValueKey(ControlHandle, &KeyName, 0, REG_SZ, ValueString.Buffer, ValueString.Length + sizeof(UNICODE_NULL));
// }
ByeBye:
if (ControlHandle != NULL)
ZwClose(ControlHandle);
if (InstanceHandle != NULL)
ZwClose(InstanceHandle);
return Status;
}
static
NTSTATUS
NTAPI
IopQueryStopDevice(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_QUERY_STOP_DEVICE;
return IopSynchronousCall(DeviceObject, &Stack, &Dummy);
}
static
VOID
NTAPI
IopSendStopDevice(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_STOP_DEVICE;
/* Drivers should never fail a IRP_MN_STOP_DEVICE request */
IopSynchronousCall(DeviceObject, &Stack, &Dummy);
}
NTSTATUS
IopStopDevice(
PDEVICE_NODE DeviceNode)
{
NTSTATUS Status;
DPRINT("Stopping device: %wZ\n", &DeviceNode->InstancePath);
Status = IopQueryStopDevice(DeviceNode->PhysicalDeviceObject);
if (NT_SUCCESS(Status))
{
IopSendStopDevice(DeviceNode->PhysicalDeviceObject);
DeviceNode->Flags &= ~(DNF_STARTED | DNF_START_REQUEST_PENDING);
DeviceNode->Flags |= DNF_STOPPED;
return STATUS_SUCCESS;
}
return Status;
}
/* PUBLIC FUNCTIONS **********************************************************/
static
VOID
NTAPI
IopSendRemoveDevice(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
/* Drop all our state for this device in case it isn't really going away */
DeviceNode->Flags &= DNF_ENUMERATED | DNF_PROCESSED;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_REMOVE_DEVICE;
/* Drivers should never fail a IRP_MN_REMOVE_DEVICE request */
IopSynchronousCall(DeviceObject, &Stack, &Dummy);
IopNotifyPlugPlayNotification(DeviceObject,
EventCategoryTargetDeviceChange,
&GUID_TARGET_DEVICE_REMOVE_COMPLETE,
NULL,
NULL);
ObDereferenceObject(DeviceObject);
}
static
VOID
IopSendRemoveDeviceRelations(PDEVICE_RELATIONS DeviceRelations)
{
/* This function DOES dereference the device objects in all cases */
ULONG i;
for (i = 0; i < DeviceRelations->Count; i++)
{
IopSendRemoveDevice(DeviceRelations->Objects[i]);
DeviceRelations->Objects[i] = NULL;
}
ExFreePool(DeviceRelations);
}
static
VOID
IopSendRemoveChildDevices(PDEVICE_NODE ParentDeviceNode)
{
PDEVICE_NODE ChildDeviceNode, NextDeviceNode;
KIRQL OldIrql;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
ChildDeviceNode = ParentDeviceNode->Child;
while (ChildDeviceNode != NULL)
{
NextDeviceNode = ChildDeviceNode->Sibling;
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
IopSendRemoveDevice(ChildDeviceNode->PhysicalDeviceObject);
ChildDeviceNode = NextDeviceNode;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
}
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
}
static
VOID
NTAPI
IopSendSurpriseRemoval(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_SURPRISE_REMOVAL;
/* Drivers should never fail a IRP_MN_SURPRISE_REMOVAL request */
IopSynchronousCall(DeviceObject, &Stack, &Dummy);
}
static
VOID
NTAPI
IopCancelRemoveDevice(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_CANCEL_REMOVE_DEVICE;
/* Drivers should never fail a IRP_MN_CANCEL_REMOVE_DEVICE request */
IopSynchronousCall(DeviceObject, &Stack, &Dummy);
IopNotifyPlugPlayNotification(DeviceObject,
EventCategoryTargetDeviceChange,
&GUID_TARGET_DEVICE_REMOVE_CANCELLED,
NULL,
NULL);
}
static
VOID
IopCancelRemoveChildDevices(PDEVICE_NODE ParentDeviceNode)
{
PDEVICE_NODE ChildDeviceNode, NextDeviceNode;
KIRQL OldIrql;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
ChildDeviceNode = ParentDeviceNode->Child;
while (ChildDeviceNode != NULL)
{
NextDeviceNode = ChildDeviceNode->Sibling;
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
IopCancelPrepareDeviceForRemoval(ChildDeviceNode->PhysicalDeviceObject);
ChildDeviceNode = NextDeviceNode;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
}
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
}
static
VOID
IopCancelRemoveDeviceRelations(PDEVICE_RELATIONS DeviceRelations)
{
/* This function DOES dereference the device objects in all cases */
ULONG i;
for (i = 0; i < DeviceRelations->Count; i++)
{
IopCancelPrepareDeviceForRemoval(DeviceRelations->Objects[i]);
ObDereferenceObject(DeviceRelations->Objects[i]);
DeviceRelations->Objects[i] = NULL;
}
ExFreePool(DeviceRelations);
}
static
VOID
IopCancelPrepareDeviceForRemoval(PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatusBlock;
PDEVICE_RELATIONS DeviceRelations;
NTSTATUS Status;
IopCancelRemoveDevice(DeviceObject);
Stack.Parameters.QueryDeviceRelations.Type = RemovalRelations;
Status = IopInitiatePnpIrp(DeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_RELATIONS,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed with status 0x%08lx\n", Status);
DeviceRelations = NULL;
}
else
{
DeviceRelations = (PDEVICE_RELATIONS)IoStatusBlock.Information;
}
if (DeviceRelations)
IopCancelRemoveDeviceRelations(DeviceRelations);
}
static
NTSTATUS
NTAPI
IopQueryRemoveDevice(IN PDEVICE_OBJECT DeviceObject)
{
PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
IO_STACK_LOCATION Stack;
PVOID Dummy;
NTSTATUS Status;
ASSERT(DeviceNode);
IopQueueTargetDeviceEvent(&GUID_DEVICE_REMOVE_PENDING,
&DeviceNode->InstancePath);
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_QUERY_REMOVE_DEVICE;
Status = IopSynchronousCall(DeviceObject, &Stack, &Dummy);
IopNotifyPlugPlayNotification(DeviceObject,
EventCategoryTargetDeviceChange,
&GUID_TARGET_DEVICE_QUERY_REMOVE,
NULL,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("Removal vetoed by %wZ\n", &DeviceNode->InstancePath);
IopQueueTargetDeviceEvent(&GUID_DEVICE_REMOVAL_VETOED,
&DeviceNode->InstancePath);
}
return Status;
}
static
NTSTATUS
IopQueryRemoveChildDevices(PDEVICE_NODE ParentDeviceNode, BOOLEAN Force)
{
PDEVICE_NODE ChildDeviceNode, NextDeviceNode, FailedRemoveDevice;
NTSTATUS Status;
KIRQL OldIrql;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
ChildDeviceNode = ParentDeviceNode->Child;
while (ChildDeviceNode != NULL)
{
NextDeviceNode = ChildDeviceNode->Sibling;
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
Status = IopPrepareDeviceForRemoval(ChildDeviceNode->PhysicalDeviceObject, Force);
if (!NT_SUCCESS(Status))
{
FailedRemoveDevice = ChildDeviceNode;
goto cleanup;
}
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
ChildDeviceNode = NextDeviceNode;
}
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
return STATUS_SUCCESS;
cleanup:
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
ChildDeviceNode = ParentDeviceNode->Child;
while (ChildDeviceNode != NULL)
{
NextDeviceNode = ChildDeviceNode->Sibling;
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
IopCancelPrepareDeviceForRemoval(ChildDeviceNode->PhysicalDeviceObject);
/* IRP_MN_CANCEL_REMOVE_DEVICE is also sent to the device
* that failed the IRP_MN_QUERY_REMOVE_DEVICE request */
if (ChildDeviceNode == FailedRemoveDevice)
return Status;
ChildDeviceNode = NextDeviceNode;
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
}
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
return Status;
}
static
NTSTATUS
IopQueryRemoveDeviceRelations(PDEVICE_RELATIONS DeviceRelations, BOOLEAN Force)
{
/* This function DOES NOT dereference the device objects on SUCCESS
* but it DOES dereference device objects on FAILURE */
ULONG i, j;
NTSTATUS Status;
for (i = 0; i < DeviceRelations->Count; i++)
{
Status = IopPrepareDeviceForRemoval(DeviceRelations->Objects[i], Force);
if (!NT_SUCCESS(Status))
{
j = i;
goto cleanup;
}
}
return STATUS_SUCCESS;
cleanup:
/* IRP_MN_CANCEL_REMOVE_DEVICE is also sent to the device
* that failed the IRP_MN_QUERY_REMOVE_DEVICE request */
for (i = 0; i <= j; i++)
{
IopCancelPrepareDeviceForRemoval(DeviceRelations->Objects[i]);
ObDereferenceObject(DeviceRelations->Objects[i]);
DeviceRelations->Objects[i] = NULL;
}
for (; i < DeviceRelations->Count; i++)
{
ObDereferenceObject(DeviceRelations->Objects[i]);
DeviceRelations->Objects[i] = NULL;
}
ExFreePool(DeviceRelations);
return Status;
}
static
NTSTATUS
IopPrepareDeviceForRemoval(IN PDEVICE_OBJECT DeviceObject, BOOLEAN Force)
{
PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
IO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatusBlock;
PDEVICE_RELATIONS DeviceRelations;
NTSTATUS Status;
if ((DeviceNode->UserFlags & DNUF_NOT_DISABLEABLE) && !Force)
{
DPRINT1("Removal not allowed for %wZ\n", &DeviceNode->InstancePath);
return STATUS_UNSUCCESSFUL;
}
if (!Force && IopQueryRemoveDevice(DeviceObject) != STATUS_SUCCESS)
{
DPRINT1("Removal vetoed by failing the query remove request\n");
IopCancelRemoveDevice(DeviceObject);
return STATUS_UNSUCCESSFUL;
}
Stack.Parameters.QueryDeviceRelations.Type = RemovalRelations;
Status = IopInitiatePnpIrp(DeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_RELATIONS,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed with status 0x%08lx\n", Status);
DeviceRelations = NULL;
}
else
{
DeviceRelations = (PDEVICE_RELATIONS)IoStatusBlock.Information;
}
if (DeviceRelations)
{
Status = IopQueryRemoveDeviceRelations(DeviceRelations, Force);
if (!NT_SUCCESS(Status))
return Status;
}
Status = IopQueryRemoveChildDevices(DeviceNode, Force);
if (!NT_SUCCESS(Status))
{
if (DeviceRelations)
IopCancelRemoveDeviceRelations(DeviceRelations);
return Status;
}
if (DeviceRelations)
IopSendRemoveDeviceRelations(DeviceRelations);
IopSendRemoveChildDevices(DeviceNode);
return STATUS_SUCCESS;
}
static
VOID
IopHandleDeviceRemoval(
IN PDEVICE_NODE DeviceNode,
IN PDEVICE_RELATIONS DeviceRelations)
{
PDEVICE_NODE Child = DeviceNode->Child, NextChild;
ULONG i;
BOOLEAN Found;
if (DeviceNode == IopRootDeviceNode)
return;
while (Child != NULL)
{
NextChild = Child->Sibling;
Found = FALSE;
for (i = 0; DeviceRelations && i < DeviceRelations->Count; i++)
{
if (IopGetDeviceNode(DeviceRelations->Objects[i]) == Child)
{
Found = TRUE;
break;
}
}
if (!Found && !(Child->Flags & DNF_WILL_BE_REMOVED))
{
/* Send removal IRPs to all of its children */
IopPrepareDeviceForRemoval(Child->PhysicalDeviceObject, TRUE);
/* Send the surprise removal IRP */
IopSendSurpriseRemoval(Child->PhysicalDeviceObject);
/* Tell the user-mode PnP manager that a device was removed */
IopQueueTargetDeviceEvent(&GUID_DEVICE_SURPRISE_REMOVAL,
&Child->InstancePath);
/* Send the remove device IRP */
IopSendRemoveDevice(Child->PhysicalDeviceObject);
}
Child = NextChild;
}
}
NTSTATUS
IopRemoveDevice(PDEVICE_NODE DeviceNode)
{
NTSTATUS Status;
DPRINT("Removing device: %wZ\n", &DeviceNode->InstancePath);
Status = IopPrepareDeviceForRemoval(DeviceNode->PhysicalDeviceObject, FALSE);
if (NT_SUCCESS(Status))
{
IopSendRemoveDevice(DeviceNode->PhysicalDeviceObject);
IopQueueTargetDeviceEvent(&GUID_DEVICE_SAFE_REMOVAL,
&DeviceNode->InstancePath);
return STATUS_SUCCESS;
}
return Status;
}
/*
* @implemented
*/
VOID
NTAPI
IoInvalidateDeviceState(IN PDEVICE_OBJECT PhysicalDeviceObject)
{
PDEVICE_NODE DeviceNode = IopGetDeviceNode(PhysicalDeviceObject);
IO_STACK_LOCATION Stack;
ULONG_PTR PnPFlags;
NTSTATUS Status;
IO_STATUS_BLOCK IoStatusBlock;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_QUERY_PNP_DEVICE_STATE;
Status = IopSynchronousCall(PhysicalDeviceObject, &Stack, (PVOID*)&PnPFlags);
if (!NT_SUCCESS(Status))
{
if (Status != STATUS_NOT_SUPPORTED)
{
DPRINT1("IRP_MN_QUERY_PNP_DEVICE_STATE failed with status 0x%lx\n", Status);
}
return;
}
if (PnPFlags & PNP_DEVICE_NOT_DISABLEABLE)
DeviceNode->UserFlags |= DNUF_NOT_DISABLEABLE;
else
DeviceNode->UserFlags &= ~DNUF_NOT_DISABLEABLE;
if (PnPFlags & PNP_DEVICE_DONT_DISPLAY_IN_UI)
DeviceNode->UserFlags |= DNUF_DONT_SHOW_IN_UI;
else
DeviceNode->UserFlags &= ~DNUF_DONT_SHOW_IN_UI;
if ((PnPFlags & PNP_DEVICE_REMOVED) ||
((PnPFlags & PNP_DEVICE_FAILED) && !(PnPFlags & PNP_DEVICE_RESOURCE_REQUIREMENTS_CHANGED)))
{
/* Flag it if it's failed */
if (PnPFlags & PNP_DEVICE_FAILED) DeviceNode->Problem = CM_PROB_FAILED_POST_START;
/* Send removal IRPs to all of its children */
IopPrepareDeviceForRemoval(PhysicalDeviceObject, TRUE);
/* Send surprise removal */
IopSendSurpriseRemoval(PhysicalDeviceObject);
/* Tell the user-mode PnP manager that a device was removed */
IopQueueTargetDeviceEvent(&GUID_DEVICE_SURPRISE_REMOVAL,
&DeviceNode->InstancePath);
IopSendRemoveDevice(PhysicalDeviceObject);
}
else if ((PnPFlags & PNP_DEVICE_FAILED) && (PnPFlags & PNP_DEVICE_RESOURCE_REQUIREMENTS_CHANGED))
{
/* Stop for resource rebalance */
Status = IopStopDevice(DeviceNode);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to stop device for rebalancing\n");
/* Stop failed so don't rebalance */
PnPFlags &= ~PNP_DEVICE_RESOURCE_REQUIREMENTS_CHANGED;
}
}
/* Resource rebalance */
if (PnPFlags & PNP_DEVICE_RESOURCE_REQUIREMENTS_CHANGED)
{
DPRINT("Sending IRP_MN_QUERY_RESOURCES to device stack\n");
Status = IopInitiatePnpIrp(PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_RESOURCES,
NULL);
if (NT_SUCCESS(Status) && IoStatusBlock.Information)
{
DeviceNode->BootResources =
(PCM_RESOURCE_LIST)IoStatusBlock.Information;
IopDeviceNodeSetFlag(DeviceNode, DNF_HAS_BOOT_CONFIG);
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %x) or IoStatusBlock.Information=NULL\n", Status);
DeviceNode->BootResources = NULL;
}
DPRINT("Sending IRP_MN_QUERY_RESOURCE_REQUIREMENTS to device stack\n");
Status = IopInitiatePnpIrp(PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_RESOURCE_REQUIREMENTS,
NULL);
if (NT_SUCCESS(Status))
{
DeviceNode->ResourceRequirements =
(PIO_RESOURCE_REQUIREMENTS_LIST)IoStatusBlock.Information;
}
else
{
DPRINT("IopInitiatePnpIrp() failed (Status %08lx)\n", Status);
DeviceNode->ResourceRequirements = NULL;
}
/* IRP_MN_FILTER_RESOURCE_REQUIREMENTS is called indirectly by IopStartDevice */
if (IopStartDevice(DeviceNode) != STATUS_SUCCESS)
{
DPRINT1("Restart after resource rebalance failed\n");
DeviceNode->Flags &= ~(DNF_STARTED | DNF_START_REQUEST_PENDING);
DeviceNode->Flags |= DNF_START_FAILED;
IopRemoveDevice(DeviceNode);
}
}
}
/*
* IopInitializePnpServices
*
* Initialize services for discovered children
*
* Parameters
* DeviceNode
* Top device node to start initializing services.
*
* Return Value
* Status
*/
NTSTATUS
IopInitializePnpServices(IN PDEVICE_NODE DeviceNode)
{
DEVICETREE_TRAVERSE_CONTEXT Context;
DPRINT("IopInitializePnpServices(%p)\n", DeviceNode);
IopInitDeviceTreeTraverseContext(
&Context,
DeviceNode,
IopActionInitChildServices,
DeviceNode);
return IopTraverseDeviceTree(&Context);
}
static
NTSTATUS
PipEnumerateDevice(
_In_ PDEVICE_NODE DeviceNode)
{
DEVICETREE_TRAVERSE_CONTEXT Context;
PDEVICE_RELATIONS DeviceRelations;
PDEVICE_OBJECT ChildDeviceObject;
IO_STATUS_BLOCK IoStatusBlock;
PDEVICE_NODE ChildDeviceNode;
IO_STACK_LOCATION Stack;
NTSTATUS Status;
ULONG i;
if (DeviceNode->Flags & DNF_NEED_ENUMERATION_ONLY)
{
DeviceNode->Flags &= ~DNF_NEED_ENUMERATION_ONLY;
DPRINT("Sending GUID_DEVICE_ARRIVAL %wZ\n", &DeviceNode->InstancePath);
IopQueueTargetDeviceEvent(&GUID_DEVICE_ARRIVAL,
&DeviceNode->InstancePath);
}
DPRINT("Sending IRP_MN_QUERY_DEVICE_RELATIONS to device stack\n");
Stack.Parameters.QueryDeviceRelations.Type = BusRelations;
Status = IopInitiatePnpIrp(
DeviceNode->PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_RELATIONS,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed with status 0x%08lx\n", Status);
return Status;
}
DeviceRelations = (PDEVICE_RELATIONS)IoStatusBlock.Information;
/*
* Send removal IRPs for devices that have disappeared
* NOTE: This code handles the case where no relations are specified
*/
IopHandleDeviceRemoval(DeviceNode, DeviceRelations);
/* Now we bail if nothing was returned */
if (!DeviceRelations)
{
/* We're all done */
DPRINT("No PDOs\n");
return STATUS_SUCCESS;
}
DPRINT("Got %u PDOs\n", DeviceRelations->Count);
/*
* Create device nodes for all discovered devices
*/
for (i = 0; i < DeviceRelations->Count; i++)
{
ChildDeviceObject = DeviceRelations->Objects[i];
ASSERT((ChildDeviceObject->Flags & DO_DEVICE_INITIALIZING) == 0);
ChildDeviceNode = IopGetDeviceNode(ChildDeviceObject);
if (!ChildDeviceNode)
{
/* One doesn't exist, create it */
Status = IopCreateDeviceNode(
DeviceNode,
ChildDeviceObject,
NULL,
&ChildDeviceNode);
if (NT_SUCCESS(Status))
{
/* Mark the node as enumerated */
ChildDeviceNode->Flags |= DNF_ENUMERATED;
/* Mark the DO as bus enumerated */
ChildDeviceObject->Flags |= DO_BUS_ENUMERATED_DEVICE;
}
else
{
/* Ignore this DO */
DPRINT1("IopCreateDeviceNode() failed with status 0x%08x. Skipping PDO %u\n", Status, i);
ObDereferenceObject(ChildDeviceObject);
}
}
else
{
/* Mark it as enumerated */
ChildDeviceNode->Flags |= DNF_ENUMERATED;
ObDereferenceObject(ChildDeviceObject);
}
}
ExFreePool(DeviceRelations);
/*
* Retrieve information about all discovered children from the bus driver
*/
IopInitDeviceTreeTraverseContext(
&Context,
DeviceNode,
IopActionInterrogateDeviceStack,
DeviceNode);
Status = IopTraverseDeviceTree(&Context);
if (!NT_SUCCESS(Status))
{
DPRINT("IopTraverseDeviceTree() failed with status 0x%08lx\n", Status);
return Status;
}
/*
* Retrieve configuration from the registry for discovered children
*/
IopInitDeviceTreeTraverseContext(
&Context,
DeviceNode,
IopActionConfigureChildServices,
DeviceNode);
Status = IopTraverseDeviceTree(&Context);
if (!NT_SUCCESS(Status))
{
DPRINT("IopTraverseDeviceTree() failed with status 0x%08lx\n", Status);
return Status;
}
/*
* Initialize services for discovered children.
*/
Status = IopInitializePnpServices(DeviceNode);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitializePnpServices() failed with status 0x%08lx\n", Status);
return Status;
}
DPRINT("IopEnumerateDevice() finished\n");
return STATUS_SUCCESS;
}
static
NTSTATUS
NTAPI
IopSendEject(IN PDEVICE_OBJECT DeviceObject)
{
IO_STACK_LOCATION Stack;
PVOID Dummy;
RtlZeroMemory(&Stack, sizeof(IO_STACK_LOCATION));
Stack.MajorFunction = IRP_MJ_PNP;
Stack.MinorFunction = IRP_MN_EJECT;
return IopSynchronousCall(DeviceObject, &Stack, &Dummy);
}
/*
* @implemented
*/
VOID
NTAPI
IoRequestDeviceEject(IN PDEVICE_OBJECT PhysicalDeviceObject)
{
PDEVICE_NODE DeviceNode = IopGetDeviceNode(PhysicalDeviceObject);
PDEVICE_RELATIONS DeviceRelations;
IO_STATUS_BLOCK IoStatusBlock;
IO_STACK_LOCATION Stack;
DEVICE_CAPABILITIES Capabilities;
NTSTATUS Status;
IopQueueTargetDeviceEvent(&GUID_DEVICE_KERNEL_INITIATED_EJECT,
&DeviceNode->InstancePath);
if (IopQueryDeviceCapabilities(DeviceNode, &Capabilities) != STATUS_SUCCESS)
{
goto cleanup;
}
Stack.Parameters.QueryDeviceRelations.Type = EjectionRelations;
Status = IopInitiatePnpIrp(PhysicalDeviceObject,
&IoStatusBlock,
IRP_MN_QUERY_DEVICE_RELATIONS,
&Stack);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed with status 0x%08lx\n", Status);
DeviceRelations = NULL;
}
else
{
DeviceRelations = (PDEVICE_RELATIONS)IoStatusBlock.Information;
}
if (DeviceRelations)
{
Status = IopQueryRemoveDeviceRelations(DeviceRelations, FALSE);
if (!NT_SUCCESS(Status))
goto cleanup;
}
Status = IopQueryRemoveChildDevices(DeviceNode, FALSE);
if (!NT_SUCCESS(Status))
{
if (DeviceRelations)
IopCancelRemoveDeviceRelations(DeviceRelations);
goto cleanup;
}
if (IopPrepareDeviceForRemoval(PhysicalDeviceObject, FALSE) != STATUS_SUCCESS)
{
if (DeviceRelations)
IopCancelRemoveDeviceRelations(DeviceRelations);
IopCancelRemoveChildDevices(DeviceNode);
goto cleanup;
}
if (DeviceRelations)
IopSendRemoveDeviceRelations(DeviceRelations);
IopSendRemoveChildDevices(DeviceNode);
DeviceNode->Problem = CM_PROB_HELD_FOR_EJECT;
if (Capabilities.EjectSupported)
{
if (IopSendEject(PhysicalDeviceObject) != STATUS_SUCCESS)
{
goto cleanup;
}
}
else
{
DeviceNode->Flags |= DNF_DISABLED;
}
IopQueueTargetDeviceEvent(&GUID_DEVICE_EJECT,
&DeviceNode->InstancePath);
return;
cleanup:
IopQueueTargetDeviceEvent(&GUID_DEVICE_EJECT_VETOED,
&DeviceNode->InstancePath);
}
#ifdef DBG
static
PCSTR
ActionToStr(
_In_ DEVICE_ACTION Action)
{
switch (Action)
{
case PiActionEnumDeviceTree:
return "PiActionEnumDeviceTree";
case PiActionEnumRootDevices:
return "PiActionEnumRootDevices";
default:
return "(request unknown)";
}
}
#endif
static
VOID
NTAPI
PipDeviceActionWorker(
_In_opt_ PVOID Context)
{
PLIST_ENTRY ListEntry;
PDEVICE_ACTION_REQUEST Request;
KIRQL OldIrql;
KeAcquireSpinLock(&IopDeviceActionLock, &OldIrql);
while (!IsListEmpty(&IopDeviceActionRequestList))
{
ListEntry = RemoveHeadList(&IopDeviceActionRequestList);
KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
Request = CONTAINING_RECORD(ListEntry, DEVICE_ACTION_REQUEST, RequestListEntry);
ASSERT(Request->DeviceObject);
PDEVICE_NODE deviceNode = IopGetDeviceNode(Request->DeviceObject);
ASSERT(deviceNode);
NTSTATUS status = STATUS_SUCCESS;
DPRINT("Processing PnP request %p: DeviceObject - %p, Action - %s\n",
Request, Request->DeviceObject, ActionToStr(Request->Action));
switch (Request->Action)
{
case PiActionEnumRootDevices:
case PiActionEnumDeviceTree:
status = PipEnumerateDevice(deviceNode);
break;
default:
DPRINT1("Unimplemented device action %u\n", Request->Action);
status = STATUS_NOT_IMPLEMENTED;
break;
}
if (Request->CompletionStatus)
{
*Request->CompletionStatus = status;
}
if (Request->CompletionEvent)
{
KeSetEvent(Request->CompletionEvent, IO_NO_INCREMENT, FALSE);
}
DPRINT("Finished processing PnP request %p\n", Request);
ObDereferenceObject(Request->DeviceObject);
ExFreePoolWithTag(Request, TAG_IO);
KeAcquireSpinLock(&IopDeviceActionLock, &OldIrql);
}
IopDeviceActionInProgress = FALSE;
KeSetEvent(&PiEnumerationFinished, IO_NO_INCREMENT, FALSE);
KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
}
/**
* @brief Queue a device operation to a worker thread.
*
* @param[in] DeviceObject The device object
* @param[in] Action The action
* @param[in] CompletionEvent The completion event object (optional)
* @param[out] CompletionStatus Status returned be the action will be written here
*/
VOID
PiQueueDeviceAction(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ DEVICE_ACTION Action,
_In_opt_ PKEVENT CompletionEvent,
_Out_opt_ NTSTATUS *CompletionStatus)
{
PDEVICE_ACTION_REQUEST Request;
KIRQL OldIrql;
Request = ExAllocatePoolWithTag(NonPagedPool, sizeof(*Request), TAG_IO);
if (!Request)
{
KeBugCheckEx(PNP_DETECTED_FATAL_ERROR, 0x3, 0, 0, 0);
return;
}
DPRINT("PiQueueDeviceAction: DeviceObject - %p, Request - %p, Action - %s\n",
DeviceObject, Request, ActionToStr(Action));
ObReferenceObject(DeviceObject);
Request->DeviceObject = DeviceObject;
Request->Action = Action;
Request->CompletionEvent = CompletionEvent;
Request->CompletionStatus = CompletionStatus;
KeAcquireSpinLock(&IopDeviceActionLock, &OldIrql);
InsertTailList(&IopDeviceActionRequestList, &Request->RequestListEntry);
if (Action == PiActionEnumRootDevices)
{
ASSERT(!IopDeviceActionInProgress);
IopDeviceActionInProgress = TRUE;
KeClearEvent(&PiEnumerationFinished);
KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
PipDeviceActionWorker(NULL);
return;
}
if (IopDeviceActionInProgress || !PnPBootDriversLoaded)
{
KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
return;
}
IopDeviceActionInProgress = TRUE;
KeClearEvent(&PiEnumerationFinished);
KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
ExInitializeWorkItem(&IopDeviceActionWorkItem, PipDeviceActionWorker, NULL);
ExQueueWorkItem(&IopDeviceActionWorkItem, DelayedWorkQueue);
}
/**
* @brief Perfom a device operation synchronously via PiQueueDeviceAction
*
* @param[in] DeviceObject The device object
* @param[in] Action The action
*
* @return Status of the operation
*/
NTSTATUS
PiPerformSyncDeviceAction(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ DEVICE_ACTION Action)
{
KEVENT opFinished;
NTSTATUS status;
KeInitializeEvent(&opFinished, SynchronizationEvent, FALSE);
PiQueueDeviceAction(DeviceObject, Action, &opFinished, &status);
KeWaitForSingleObject(&opFinished, Executive, KernelMode, FALSE, NULL);
return status;
}
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