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reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
Victor Perevertkin 798fc13b48
[NTOS:PNP] Implement NT5.2-like DEVICE_NODE state management 
- Use DeviceNode->State field and its values, instead of
  DeviceNode->Flags for tracking current node state
- Change DNF_* flags to the ones compatible with Windows XP+
- Simplify state changes for device nodes and encapsulate all the logic
  inside the PiDevNodeStateMachine routine. This makes the ground for
  future improvements in the device removal sequence and
  resource management
- Now values inside DeviceNode->State and ->Flags are compatible with
  the windbg !devnode macro and can be tracked using it
- BUGFIX: fixed cases where IRP_MN_START_DEVICE or
  IRP_MN_QUERY_DEVICE_RELATIONS may be sent to a device after a
  IRP_MN_REMOVE_DEVICE

CORE-7826
2021-01-27 05:15:15 +03:00

2415 lines
82 KiB
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/*
* PROJECT: ReactOS Kernel
* COPYRIGHT: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/io/pnpmgr/pnpmgr.c
* PURPOSE: Initializes the PnP manager
* PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
* Copyright 2007 Hervé Poussineau (hpoussin@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* GLOBALS *******************************************************************/
ERESOURCE PpRegistryDeviceResource;
KGUARDED_MUTEX PpDeviceReferenceTableLock;
RTL_AVL_TABLE PpDeviceReferenceTable;
BOOLEAN PnPBootDriversLoaded;
extern ULONG ExpInitializationPhase;
/* DATA **********************************************************************/
PDRIVER_OBJECT IopRootDriverObject;
PIO_BUS_TYPE_GUID_LIST PnpBusTypeGuidList = NULL;
/* FUNCTIONS *****************************************************************/
VOID
IopFixupDeviceId(PWCHAR String)
{
SIZE_T Length = wcslen(String), i;
for (i = 0; i < Length; i++)
{
if (String[i] == L'\\')
String[i] = L'#';
}
}
VOID
NTAPI
IopInstallCriticalDevice(PDEVICE_NODE DeviceNode)
{
NTSTATUS Status;
HANDLE CriticalDeviceKey, InstanceKey;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING CriticalDeviceKeyU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\CriticalDeviceDatabase");
UNICODE_STRING CompatibleIdU = RTL_CONSTANT_STRING(L"CompatibleIDs");
UNICODE_STRING HardwareIdU = RTL_CONSTANT_STRING(L"HardwareID");
UNICODE_STRING ServiceU = RTL_CONSTANT_STRING(L"Service");
UNICODE_STRING ClassGuidU = RTL_CONSTANT_STRING(L"ClassGUID");
PKEY_VALUE_PARTIAL_INFORMATION PartialInfo;
ULONG HidLength = 0, CidLength = 0, BufferLength;
PWCHAR IdBuffer, OriginalIdBuffer;
/* Open the device instance key */
Status = IopCreateDeviceKeyPath(&DeviceNode->InstancePath, REG_OPTION_NON_VOLATILE, &InstanceKey);
if (Status != STATUS_SUCCESS)
return;
Status = ZwQueryValueKey(InstanceKey,
&HardwareIdU,
KeyValuePartialInformation,
NULL,
0,
&HidLength);
if (Status != STATUS_BUFFER_OVERFLOW && Status != STATUS_BUFFER_TOO_SMALL)
{
ZwClose(InstanceKey);
return;
}
Status = ZwQueryValueKey(InstanceKey,
&CompatibleIdU,
KeyValuePartialInformation,
NULL,
0,
&CidLength);
if (Status != STATUS_BUFFER_OVERFLOW && Status != STATUS_BUFFER_TOO_SMALL)
{
CidLength = 0;
}
BufferLength = HidLength + CidLength;
BufferLength -= (((CidLength != 0) ? 2 : 1) * FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data));
/* Allocate a buffer to hold data from both */
OriginalIdBuffer = IdBuffer = ExAllocatePool(PagedPool, BufferLength);
if (!IdBuffer)
{
ZwClose(InstanceKey);
return;
}
/* Compute the buffer size */
if (HidLength > CidLength)
BufferLength = HidLength;
else
BufferLength = CidLength;
PartialInfo = ExAllocatePool(PagedPool, BufferLength);
if (!PartialInfo)
{
ZwClose(InstanceKey);
ExFreePool(OriginalIdBuffer);
return;
}
Status = ZwQueryValueKey(InstanceKey,
&HardwareIdU,
KeyValuePartialInformation,
PartialInfo,
HidLength,
&HidLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(PartialInfo);
ExFreePool(OriginalIdBuffer);
ZwClose(InstanceKey);
return;
}
/* Copy in HID info first (without 2nd terminating NULL if CID is present) */
HidLength = PartialInfo->DataLength - ((CidLength != 0) ? sizeof(WCHAR) : 0);
RtlCopyMemory(IdBuffer, PartialInfo->Data, HidLength);
if (CidLength != 0)
{
Status = ZwQueryValueKey(InstanceKey,
&CompatibleIdU,
KeyValuePartialInformation,
PartialInfo,
CidLength,
&CidLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(PartialInfo);
ExFreePool(OriginalIdBuffer);
ZwClose(InstanceKey);
return;
}
/* Copy CID next */
CidLength = PartialInfo->DataLength;
RtlCopyMemory(((PUCHAR)IdBuffer) + HidLength, PartialInfo->Data, CidLength);
}
/* Free our temp buffer */
ExFreePool(PartialInfo);
InitializeObjectAttributes(&ObjectAttributes,
&CriticalDeviceKeyU,
OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = ZwOpenKey(&CriticalDeviceKey,
KEY_ENUMERATE_SUB_KEYS,
&ObjectAttributes);
if (!NT_SUCCESS(Status))
{
/* The critical device database doesn't exist because
* we're probably in 1st stage setup, but it's ok */
ExFreePool(OriginalIdBuffer);
ZwClose(InstanceKey);
return;
}
while (*IdBuffer)
{
USHORT StringLength = (USHORT)wcslen(IdBuffer) + 1, Index;
IopFixupDeviceId(IdBuffer);
/* Look through all subkeys for a match */
for (Index = 0; TRUE; Index++)
{
ULONG NeededLength;
PKEY_BASIC_INFORMATION BasicInfo;
Status = ZwEnumerateKey(CriticalDeviceKey,
Index,
KeyBasicInformation,
NULL,
0,
&NeededLength);
if (Status == STATUS_NO_MORE_ENTRIES)
break;
else if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
UNICODE_STRING ChildIdNameU, RegKeyNameU;
BasicInfo = ExAllocatePool(PagedPool, NeededLength);
if (!BasicInfo)
{
/* No memory */
ExFreePool(OriginalIdBuffer);
ZwClose(CriticalDeviceKey);
ZwClose(InstanceKey);
return;
}
Status = ZwEnumerateKey(CriticalDeviceKey,
Index,
KeyBasicInformation,
BasicInfo,
NeededLength,
&NeededLength);
if (Status != STATUS_SUCCESS)
{
/* This shouldn't happen */
ExFreePool(BasicInfo);
continue;
}
ChildIdNameU.Buffer = IdBuffer;
ChildIdNameU.MaximumLength = ChildIdNameU.Length = (StringLength - 1) * sizeof(WCHAR);
RegKeyNameU.Buffer = BasicInfo->Name;
RegKeyNameU.MaximumLength = RegKeyNameU.Length = (USHORT)BasicInfo->NameLength;
if (RtlEqualUnicodeString(&ChildIdNameU, &RegKeyNameU, TRUE))
{
HANDLE ChildKeyHandle;
InitializeObjectAttributes(&ObjectAttributes,
&ChildIdNameU,
OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
CriticalDeviceKey,
NULL);
Status = ZwOpenKey(&ChildKeyHandle,
KEY_QUERY_VALUE,
&ObjectAttributes);
if (Status != STATUS_SUCCESS)
{
ExFreePool(BasicInfo);
continue;
}
/* Check if there's already a driver installed */
Status = ZwQueryValueKey(InstanceKey,
&ClassGuidU,
KeyValuePartialInformation,
NULL,
0,
&NeededLength);
if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(BasicInfo);
continue;
}
Status = ZwQueryValueKey(ChildKeyHandle,
&ClassGuidU,
KeyValuePartialInformation,
NULL,
0,
&NeededLength);
if (Status != STATUS_BUFFER_OVERFLOW && Status != STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(BasicInfo);
continue;
}
PartialInfo = ExAllocatePool(PagedPool, NeededLength);
if (!PartialInfo)
{
ExFreePool(OriginalIdBuffer);
ExFreePool(BasicInfo);
ZwClose(InstanceKey);
ZwClose(ChildKeyHandle);
ZwClose(CriticalDeviceKey);
return;
}
/* Read ClassGUID entry in the CDDB */
Status = ZwQueryValueKey(ChildKeyHandle,
&ClassGuidU,
KeyValuePartialInformation,
PartialInfo,
NeededLength,
&NeededLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(BasicInfo);
continue;
}
/* Write it to the ENUM key */
Status = ZwSetValueKey(InstanceKey,
&ClassGuidU,
0,
REG_SZ,
PartialInfo->Data,
PartialInfo->DataLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(BasicInfo);
ExFreePool(PartialInfo);
ZwClose(ChildKeyHandle);
continue;
}
Status = ZwQueryValueKey(ChildKeyHandle,
&ServiceU,
KeyValuePartialInformation,
NULL,
0,
&NeededLength);
if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(PartialInfo);
PartialInfo = ExAllocatePool(PagedPool, NeededLength);
if (!PartialInfo)
{
ExFreePool(OriginalIdBuffer);
ExFreePool(BasicInfo);
ZwClose(InstanceKey);
ZwClose(ChildKeyHandle);
ZwClose(CriticalDeviceKey);
return;
}
/* Read the service entry from the CDDB */
Status = ZwQueryValueKey(ChildKeyHandle,
&ServiceU,
KeyValuePartialInformation,
PartialInfo,
NeededLength,
&NeededLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(BasicInfo);
ExFreePool(PartialInfo);
ZwClose(ChildKeyHandle);
continue;
}
/* Write it to the ENUM key */
Status = ZwSetValueKey(InstanceKey,
&ServiceU,
0,
REG_SZ,
PartialInfo->Data,
PartialInfo->DataLength);
if (Status != STATUS_SUCCESS)
{
ExFreePool(BasicInfo);
ExFreePool(PartialInfo);
ZwClose(ChildKeyHandle);
continue;
}
DPRINT("Installed service '%S' for critical device '%wZ'\n", PartialInfo->Data, &ChildIdNameU);
}
else
{
DPRINT1("Installed NULL service for critical device '%wZ'\n", &ChildIdNameU);
}
ExFreePool(OriginalIdBuffer);
ExFreePool(PartialInfo);
ExFreePool(BasicInfo);
ZwClose(InstanceKey);
ZwClose(ChildKeyHandle);
ZwClose(CriticalDeviceKey);
/* That's it */
return;
}
ExFreePool(BasicInfo);
}
else
{
/* Umm, not sure what happened here */
continue;
}
}
/* Advance to the next ID */
IdBuffer += StringLength;
}
ExFreePool(OriginalIdBuffer);
ZwClose(InstanceKey);
ZwClose(CriticalDeviceKey);
}
NTSTATUS
IopGetSystemPowerDeviceObject(PDEVICE_OBJECT *DeviceObject)
{
KIRQL OldIrql;
if (PopSystemPowerDeviceNode)
{
KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
*DeviceObject = PopSystemPowerDeviceNode->PhysicalDeviceObject;
KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
return STATUS_SUCCESS;
}
return STATUS_UNSUCCESSFUL;
}
USHORT
NTAPI
IopGetBusTypeGuidIndex(LPGUID BusTypeGuid)
{
USHORT i = 0, FoundIndex = 0xFFFF;
ULONG NewSize;
PVOID NewList;
/* Acquire the lock */
ExAcquireFastMutex(&PnpBusTypeGuidList->Lock);
/* Loop all entries */
while (i < PnpBusTypeGuidList->GuidCount)
{
/* Try to find a match */
if (RtlCompareMemory(BusTypeGuid,
&PnpBusTypeGuidList->Guids[i],
sizeof(GUID)) == sizeof(GUID))
{
/* Found it */
FoundIndex = i;
goto Quickie;
}
i++;
}
/* Check if we have to grow the list */
if (PnpBusTypeGuidList->GuidCount)
{
/* Calculate the new size */
NewSize = sizeof(IO_BUS_TYPE_GUID_LIST) +
(sizeof(GUID) * PnpBusTypeGuidList->GuidCount);
/* Allocate the new copy */
NewList = ExAllocatePool(PagedPool, NewSize);
if (!NewList)
{
/* Fail */
ExFreePool(PnpBusTypeGuidList);
goto Quickie;
}
/* Now copy them, decrease the size too */
NewSize -= sizeof(GUID);
RtlCopyMemory(NewList, PnpBusTypeGuidList, NewSize);
/* Free the old list */
ExFreePool(PnpBusTypeGuidList);
/* Use the new buffer */
PnpBusTypeGuidList = NewList;
}
/* Copy the new GUID */
RtlCopyMemory(&PnpBusTypeGuidList->Guids[PnpBusTypeGuidList->GuidCount],
BusTypeGuid,
sizeof(GUID));
/* The new entry is the index */
FoundIndex = (USHORT)PnpBusTypeGuidList->GuidCount;
PnpBusTypeGuidList->GuidCount++;
Quickie:
ExReleaseFastMutex(&PnpBusTypeGuidList->Lock);
return FoundIndex;
}
NTSTATUS
NTAPI
IopInitiatePnpIrp(IN PDEVICE_OBJECT DeviceObject,
IN OUT PIO_STATUS_BLOCK IoStatusBlock,
IN UCHAR MinorFunction,
IN PIO_STACK_LOCATION Stack OPTIONAL)
{
IO_STACK_LOCATION IoStackLocation;
/* Fill out the stack information */
RtlZeroMemory(&IoStackLocation, sizeof(IO_STACK_LOCATION));
IoStackLocation.MajorFunction = IRP_MJ_PNP;
IoStackLocation.MinorFunction = MinorFunction;
if (Stack)
{
/* Copy the rest */
RtlCopyMemory(&IoStackLocation.Parameters,
&Stack->Parameters,
sizeof(Stack->Parameters));
}
/* Do the PnP call */
IoStatusBlock->Status = IopSynchronousCall(DeviceObject,
&IoStackLocation,
(PVOID)&IoStatusBlock->Information);
return IoStatusBlock->Status;
}
/*
* IopCreateDeviceKeyPath
*
* Creates a registry key
*
* Parameters
* RegistryPath
* Name of the key to be created.
* Handle
* Handle to the newly created key
*
* Remarks
* This method can create nested trees, so parent of RegistryPath can
* be not existant, and will be created if needed.
*/
NTSTATUS
NTAPI
IopCreateDeviceKeyPath(IN PCUNICODE_STRING RegistryPath,
IN ULONG CreateOptions,
OUT PHANDLE Handle)
{
UNICODE_STRING EnumU = RTL_CONSTANT_STRING(ENUM_ROOT);
HANDLE hParent = NULL, hKey;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyName;
PCWSTR Current, Last;
USHORT Length;
NTSTATUS Status;
/* Assume failure */
*Handle = NULL;
/* Open root key for device instances */
Status = IopOpenRegistryKeyEx(&hParent, NULL, &EnumU, KEY_CREATE_SUB_KEY);
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwOpenKey('%wZ') failed with status 0x%08lx\n", &EnumU, Status);
return Status;
}
Current = KeyName.Buffer = RegistryPath->Buffer;
Last = &RegistryPath->Buffer[RegistryPath->Length / sizeof(WCHAR)];
/* Go up to the end of the string */
while (Current <= Last)
{
if (Current != Last && *Current != L'\\')
{
/* Not the end of the string and not a separator */
Current++;
continue;
}
/* Prepare relative key name */
Length = (USHORT)((ULONG_PTR)Current - (ULONG_PTR)KeyName.Buffer);
KeyName.MaximumLength = KeyName.Length = Length;
DPRINT("Create '%wZ'\n", &KeyName);
/* Open key */
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
hParent,
NULL);
Status = ZwCreateKey(&hKey,
Current == Last ? KEY_ALL_ACCESS : KEY_CREATE_SUB_KEY,
&ObjectAttributes,
0,
NULL,
CreateOptions,
NULL);
/* Close parent key handle, we don't need it anymore */
if (hParent)
ZwClose(hParent);
/* Key opening/creating failed? */
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwCreateKey('%wZ') failed with status 0x%08lx\n", &KeyName, Status);
return Status;
}
/* Check if it is the end of the string */
if (Current == Last)
{
/* Yes, return success */
*Handle = hKey;
return STATUS_SUCCESS;
}
/* Start with this new parent key */
hParent = hKey;
Current++;
KeyName.Buffer = (PWSTR)Current;
}
return STATUS_UNSUCCESSFUL;
}
NTSTATUS
IopSetDeviceInstanceData(HANDLE InstanceKey,
PDEVICE_NODE DeviceNode)
{
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyName;
HANDLE LogConfKey, ControlKey, DeviceParamsKey;
ULONG ResCount;
ULONG ResultLength;
NTSTATUS Status;
DPRINT("IopSetDeviceInstanceData() called\n");
/* Create the 'LogConf' key */
RtlInitUnicodeString(&KeyName, L"LogConf");
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
InstanceKey,
NULL);
Status = ZwCreateKey(&LogConfKey,
KEY_ALL_ACCESS,
&ObjectAttributes,
0,
NULL,
// FIXME? In r53694 it was silently turned from non-volatile into this,
// without any extra warning. Is this still needed??
REG_OPTION_VOLATILE,
NULL);
if (NT_SUCCESS(Status))
{
/* Set 'BootConfig' value */
if (DeviceNode->BootResources != NULL)
{
ResCount = DeviceNode->BootResources->Count;
if (ResCount != 0)
{
RtlInitUnicodeString(&KeyName, L"BootConfig");
Status = ZwSetValueKey(LogConfKey,
&KeyName,
0,
REG_RESOURCE_LIST,
DeviceNode->BootResources,
PnpDetermineResourceListSize(DeviceNode->BootResources));
}
}
/* Set 'BasicConfigVector' value */
if (DeviceNode->ResourceRequirements != NULL &&
DeviceNode->ResourceRequirements->ListSize != 0)
{
RtlInitUnicodeString(&KeyName, L"BasicConfigVector");
Status = ZwSetValueKey(LogConfKey,
&KeyName,
0,
REG_RESOURCE_REQUIREMENTS_LIST,
DeviceNode->ResourceRequirements,
DeviceNode->ResourceRequirements->ListSize);
}
ZwClose(LogConfKey);
}
/* Set the 'ConfigFlags' value */
RtlInitUnicodeString(&KeyName, L"ConfigFlags");
Status = ZwQueryValueKey(InstanceKey,
&KeyName,
KeyValueBasicInformation,
NULL,
0,
&ResultLength);
if (Status == STATUS_OBJECT_NAME_NOT_FOUND)
{
/* Write the default value */
ULONG DefaultConfigFlags = 0;
Status = ZwSetValueKey(InstanceKey,
&KeyName,
0,
REG_DWORD,
&DefaultConfigFlags,
sizeof(DefaultConfigFlags));
}
/* Create the 'Control' key */
RtlInitUnicodeString(&KeyName, L"Control");
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
InstanceKey,
NULL);
Status = ZwCreateKey(&ControlKey,
0,
&ObjectAttributes,
0,
NULL,
REG_OPTION_VOLATILE,
NULL);
if (NT_SUCCESS(Status))
ZwClose(ControlKey);
/* Create the 'Device Parameters' key and set the 'FirmwareIdentified' value for all ACPI-enumerated devices */
if (_wcsnicmp(DeviceNode->InstancePath.Buffer, L"ACPI\\", 5) == 0)
{
RtlInitUnicodeString(&KeyName, L"Device Parameters");
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
InstanceKey,
NULL);
Status = ZwCreateKey(&DeviceParamsKey,
0,
&ObjectAttributes,
0,
NULL,
REG_OPTION_NON_VOLATILE,
NULL);
if (NT_SUCCESS(Status))
{
ULONG FirmwareIdentified = 1;
RtlInitUnicodeString(&KeyName, L"FirmwareIdentified");
Status = ZwSetValueKey(DeviceParamsKey,
&KeyName,
0,
REG_DWORD,
&FirmwareIdentified,
sizeof(FirmwareIdentified));
ZwClose(DeviceParamsKey);
}
}
DPRINT("IopSetDeviceInstanceData() done\n");
return Status;
}
/*
* IopGetParentIdPrefix
*
* Retrieve (or create) a string which identifies a device.
*
* Parameters
* DeviceNode
* Pointer to device node.
* ParentIdPrefix
* Pointer to the string where is returned the parent node identifier
*
* Remarks
* If the return code is STATUS_SUCCESS, the ParentIdPrefix string is
* valid and its Buffer field is NULL-terminated. The caller needs to
* to free the string with RtlFreeUnicodeString when it is no longer
* needed.
*/
NTSTATUS
IopGetParentIdPrefix(PDEVICE_NODE DeviceNode,
PUNICODE_STRING ParentIdPrefix)
{
const UNICODE_STRING EnumKeyPath = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
ULONG KeyNameBufferLength;
PKEY_VALUE_PARTIAL_INFORMATION ParentIdPrefixInformation = NULL;
UNICODE_STRING KeyName = {0, 0, NULL};
UNICODE_STRING KeyValue;
UNICODE_STRING ValueName;
HANDLE hKey = NULL;
ULONG crc32;
NTSTATUS Status;
/* HACK: As long as some devices have a NULL device
* instance path, the following test is required :(
*/
if (DeviceNode->Parent->InstancePath.Length == 0)
{
DPRINT1("Parent of %wZ has NULL Instance path, please report!\n",
&DeviceNode->InstancePath);
return STATUS_UNSUCCESSFUL;
}
/* 1. Try to retrieve ParentIdPrefix from registry */
KeyNameBufferLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data) + sizeof(L"12345678&12345678");
ParentIdPrefixInformation = ExAllocatePoolWithTag(PagedPool,
KeyNameBufferLength + sizeof(UNICODE_NULL),
TAG_IO);
if (!ParentIdPrefixInformation)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
KeyName.Length = 0;
KeyName.MaximumLength = EnumKeyPath.Length +
DeviceNode->Parent->InstancePath.Length +
sizeof(UNICODE_NULL);
KeyName.Buffer = ExAllocatePoolWithTag(PagedPool,
KeyName.MaximumLength,
TAG_IO);
if (!KeyName.Buffer)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
goto cleanup;
}
RtlCopyUnicodeString(&KeyName, &EnumKeyPath);
RtlAppendUnicodeStringToString(&KeyName, &DeviceNode->Parent->InstancePath);
Status = IopOpenRegistryKeyEx(&hKey, NULL, &KeyName, KEY_QUERY_VALUE | KEY_SET_VALUE);
if (!NT_SUCCESS(Status))
{
goto cleanup;
}
RtlInitUnicodeString(&ValueName, L"ParentIdPrefix");
Status = ZwQueryValueKey(hKey,
&ValueName,
KeyValuePartialInformation,
ParentIdPrefixInformation,
KeyNameBufferLength,
&KeyNameBufferLength);
if (NT_SUCCESS(Status))
{
if (ParentIdPrefixInformation->Type != REG_SZ)
{
Status = STATUS_UNSUCCESSFUL;
}
else
{
KeyValue.MaximumLength = (USHORT)ParentIdPrefixInformation->DataLength;
KeyValue.Length = KeyValue.MaximumLength - sizeof(UNICODE_NULL);
KeyValue.Buffer = (PWSTR)ParentIdPrefixInformation->Data;
ASSERT(KeyValue.Buffer[KeyValue.Length / sizeof(WCHAR)] == UNICODE_NULL);
}
goto cleanup;
}
if (Status != STATUS_OBJECT_NAME_NOT_FOUND)
{
/* FIXME how do we get here and why is ParentIdPrefixInformation valid? */
KeyValue.MaximumLength = (USHORT)ParentIdPrefixInformation->DataLength;
KeyValue.Length = KeyValue.MaximumLength - sizeof(UNICODE_NULL);
KeyValue.Buffer = (PWSTR)ParentIdPrefixInformation->Data;
ASSERT(KeyValue.Buffer[KeyValue.Length / sizeof(WCHAR)] == UNICODE_NULL);
goto cleanup;
}
/* 2. Create the ParentIdPrefix value */
crc32 = RtlComputeCrc32(0,
(PUCHAR)DeviceNode->Parent->InstancePath.Buffer,
DeviceNode->Parent->InstancePath.Length);
RtlStringCbPrintfW((PWSTR)ParentIdPrefixInformation,
KeyNameBufferLength,
L"%lx&%lx",
DeviceNode->Parent->Level,
crc32);
RtlInitUnicodeString(&KeyValue, (PWSTR)ParentIdPrefixInformation);
/* 3. Try to write the ParentIdPrefix to registry */
Status = ZwSetValueKey(hKey,
&ValueName,
0,
REG_SZ,
KeyValue.Buffer,
((ULONG)wcslen(KeyValue.Buffer) + 1) * sizeof(WCHAR));
cleanup:
if (NT_SUCCESS(Status))
{
/* Duplicate the string to return it */
Status = RtlDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE,
&KeyValue,
ParentIdPrefix);
}
ExFreePoolWithTag(ParentIdPrefixInformation, TAG_IO);
RtlFreeUnicodeString(&KeyName);
if (hKey != NULL)
{
ZwClose(hKey);
}
return Status;
}
static
CODE_SEG("INIT")
NTSTATUS
IopEnumerateDetectedDevices(
IN HANDLE hBaseKey,
IN PUNICODE_STRING RelativePath OPTIONAL,
IN HANDLE hRootKey,
IN BOOLEAN EnumerateSubKeys,
IN PCM_FULL_RESOURCE_DESCRIPTOR ParentBootResources,
IN ULONG ParentBootResourcesLength)
{
UNICODE_STRING IdentifierU = RTL_CONSTANT_STRING(L"Identifier");
UNICODE_STRING HardwareIDU = RTL_CONSTANT_STRING(L"HardwareID");
UNICODE_STRING ConfigurationDataU = RTL_CONSTANT_STRING(L"Configuration Data");
UNICODE_STRING BootConfigU = RTL_CONSTANT_STRING(L"BootConfig");
UNICODE_STRING LogConfU = RTL_CONSTANT_STRING(L"LogConf");
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE hDevicesKey = NULL;
HANDLE hDeviceKey = NULL;
HANDLE hLevel1Key, hLevel2Key = NULL, hLogConf;
UNICODE_STRING Level2NameU;
WCHAR Level2Name[5];
ULONG IndexDevice = 0;
ULONG IndexSubKey;
PKEY_BASIC_INFORMATION pDeviceInformation = NULL;
ULONG DeviceInfoLength = sizeof(KEY_BASIC_INFORMATION) + 50 * sizeof(WCHAR);
PKEY_VALUE_PARTIAL_INFORMATION pValueInformation = NULL;
ULONG ValueInfoLength = sizeof(KEY_VALUE_PARTIAL_INFORMATION) + 50 * sizeof(WCHAR);
UNICODE_STRING DeviceName, ValueName;
ULONG RequiredSize;
PCM_FULL_RESOURCE_DESCRIPTOR BootResources = NULL;
ULONG BootResourcesLength;
NTSTATUS Status;
const UNICODE_STRING IdentifierSerial = RTL_CONSTANT_STRING(L"SerialController");
UNICODE_STRING HardwareIdSerial = RTL_CONSTANT_STRING(L"*PNP0501\0");
static ULONG DeviceIndexSerial = 0;
const UNICODE_STRING IdentifierKeyboard = RTL_CONSTANT_STRING(L"KeyboardController");
UNICODE_STRING HardwareIdKeyboard = RTL_CONSTANT_STRING(L"*PNP0303\0");
static ULONG DeviceIndexKeyboard = 0;
const UNICODE_STRING IdentifierMouse = RTL_CONSTANT_STRING(L"PointerController");
/* FIXME: IopEnumerateDetectedDevices() should be rewritten.
* The PnP identifiers can either be hardcoded or parsed from a LegacyXlate
* sections of driver INF files.
*/
#if defined(SARCH_PC98)
UNICODE_STRING HardwareIdMouse = RTL_CONSTANT_STRING(L"*nEC1F00\0");
#else
UNICODE_STRING HardwareIdMouse = RTL_CONSTANT_STRING(L"*PNP0F13\0");
#endif
static ULONG DeviceIndexMouse = 0;
const UNICODE_STRING IdentifierParallel = RTL_CONSTANT_STRING(L"ParallelController");
UNICODE_STRING HardwareIdParallel = RTL_CONSTANT_STRING(L"*PNP0400\0");
static ULONG DeviceIndexParallel = 0;
const UNICODE_STRING IdentifierFloppy = RTL_CONSTANT_STRING(L"FloppyDiskPeripheral");
UNICODE_STRING HardwareIdFloppy = RTL_CONSTANT_STRING(L"*PNP0700\0");
static ULONG DeviceIndexFloppy = 0;
UNICODE_STRING HardwareIdKey;
PUNICODE_STRING pHardwareId;
ULONG DeviceIndex = 0;
PUCHAR CmResourceList;
ULONG ListCount;
if (RelativePath)
{
Status = IopOpenRegistryKeyEx(&hDevicesKey, hBaseKey, RelativePath, KEY_ENUMERATE_SUB_KEYS);
if (!NT_SUCCESS(Status))
{
DPRINT("ZwOpenKey() failed with status 0x%08lx\n", Status);
goto cleanup;
}
}
else
hDevicesKey = hBaseKey;
pDeviceInformation = ExAllocatePool(PagedPool, DeviceInfoLength);
if (!pDeviceInformation)
{
DPRINT("ExAllocatePool() failed\n");
Status = STATUS_NO_MEMORY;
goto cleanup;
}
pValueInformation = ExAllocatePool(PagedPool, ValueInfoLength);
if (!pValueInformation)
{
DPRINT("ExAllocatePool() failed\n");
Status = STATUS_NO_MEMORY;
goto cleanup;
}
while (TRUE)
{
Status = ZwEnumerateKey(hDevicesKey, IndexDevice, KeyBasicInformation, pDeviceInformation, DeviceInfoLength, &RequiredSize);
if (Status == STATUS_NO_MORE_ENTRIES)
break;
else if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(pDeviceInformation);
DeviceInfoLength = RequiredSize;
pDeviceInformation = ExAllocatePool(PagedPool, DeviceInfoLength);
if (!pDeviceInformation)
{
DPRINT("ExAllocatePool() failed\n");
Status = STATUS_NO_MEMORY;
goto cleanup;
}
Status = ZwEnumerateKey(hDevicesKey, IndexDevice, KeyBasicInformation, pDeviceInformation, DeviceInfoLength, &RequiredSize);
}
if (!NT_SUCCESS(Status))
{
DPRINT("ZwEnumerateKey() failed with status 0x%08lx\n", Status);
goto cleanup;
}
IndexDevice++;
/* Open device key */
DeviceName.Length = DeviceName.MaximumLength = (USHORT)pDeviceInformation->NameLength;
DeviceName.Buffer = pDeviceInformation->Name;
Status = IopOpenRegistryKeyEx(&hDeviceKey, hDevicesKey, &DeviceName,
KEY_QUERY_VALUE + (EnumerateSubKeys ? KEY_ENUMERATE_SUB_KEYS : 0));
if (!NT_SUCCESS(Status))
{
DPRINT("ZwOpenKey() failed with status 0x%08lx\n", Status);
goto cleanup;
}
/* Read boot resources, and add then to parent ones */
Status = ZwQueryValueKey(hDeviceKey, &ConfigurationDataU, KeyValuePartialInformation, pValueInformation, ValueInfoLength, &RequiredSize);
if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(pValueInformation);
ValueInfoLength = RequiredSize;
pValueInformation = ExAllocatePool(PagedPool, ValueInfoLength);
if (!pValueInformation)
{
DPRINT("ExAllocatePool() failed\n");
ZwDeleteKey(hLevel2Key);
Status = STATUS_NO_MEMORY;
goto cleanup;
}
Status = ZwQueryValueKey(hDeviceKey, &ConfigurationDataU, KeyValuePartialInformation, pValueInformation, ValueInfoLength, &RequiredSize);
}
if (Status == STATUS_OBJECT_NAME_NOT_FOUND)
{
BootResources = ParentBootResources;
BootResourcesLength = ParentBootResourcesLength;
}
else if (!NT_SUCCESS(Status))
{
DPRINT("ZwQueryValueKey() failed with status 0x%08lx\n", Status);
goto nextdevice;
}
else if (pValueInformation->Type != REG_FULL_RESOURCE_DESCRIPTOR)
{
DPRINT("Wrong registry type: got 0x%lx, expected 0x%lx\n", pValueInformation->Type, REG_FULL_RESOURCE_DESCRIPTOR);
goto nextdevice;
}
else
{
static const ULONG Header = FIELD_OFFSET(CM_FULL_RESOURCE_DESCRIPTOR, PartialResourceList.PartialDescriptors);
/* Concatenate current resources and parent ones */
if (ParentBootResourcesLength == 0)
BootResourcesLength = pValueInformation->DataLength;
else
BootResourcesLength = ParentBootResourcesLength
+ pValueInformation->DataLength
- Header;
BootResources = ExAllocatePool(PagedPool, BootResourcesLength);
if (!BootResources)
{
DPRINT("ExAllocatePool() failed\n");
goto nextdevice;
}
if (ParentBootResourcesLength < sizeof(CM_FULL_RESOURCE_DESCRIPTOR))
{
RtlCopyMemory(BootResources, pValueInformation->Data, pValueInformation->DataLength);
}
else if (ParentBootResources->PartialResourceList.PartialDescriptors[ParentBootResources->PartialResourceList.Count - 1].Type == CmResourceTypeDeviceSpecific)
{
RtlCopyMemory(BootResources, pValueInformation->Data, pValueInformation->DataLength);
RtlCopyMemory(
(PVOID)((ULONG_PTR)BootResources + pValueInformation->DataLength),
(PVOID)((ULONG_PTR)ParentBootResources + Header),
ParentBootResourcesLength - Header);
BootResources->PartialResourceList.Count += ParentBootResources->PartialResourceList.Count;
}
else
{
RtlCopyMemory(BootResources, pValueInformation->Data, Header);
RtlCopyMemory(
(PVOID)((ULONG_PTR)BootResources + Header),
(PVOID)((ULONG_PTR)ParentBootResources + Header),
ParentBootResourcesLength - Header);
RtlCopyMemory(
(PVOID)((ULONG_PTR)BootResources + ParentBootResourcesLength),
pValueInformation->Data + Header,
pValueInformation->DataLength - Header);
BootResources->PartialResourceList.Count += ParentBootResources->PartialResourceList.Count;
}
}
if (EnumerateSubKeys)
{
IndexSubKey = 0;
while (TRUE)
{
Status = ZwEnumerateKey(hDeviceKey, IndexSubKey, KeyBasicInformation, pDeviceInformation, DeviceInfoLength, &RequiredSize);
if (Status == STATUS_NO_MORE_ENTRIES)
break;
else if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(pDeviceInformation);
DeviceInfoLength = RequiredSize;
pDeviceInformation = ExAllocatePool(PagedPool, DeviceInfoLength);
if (!pDeviceInformation)
{
DPRINT("ExAllocatePool() failed\n");
Status = STATUS_NO_MEMORY;
goto cleanup;
}
Status = ZwEnumerateKey(hDeviceKey, IndexSubKey, KeyBasicInformation, pDeviceInformation, DeviceInfoLength, &RequiredSize);
}
if (!NT_SUCCESS(Status))
{
DPRINT("ZwEnumerateKey() failed with status 0x%08lx\n", Status);
goto cleanup;
}
IndexSubKey++;
DeviceName.Length = DeviceName.MaximumLength = (USHORT)pDeviceInformation->NameLength;
DeviceName.Buffer = pDeviceInformation->Name;
Status = IopEnumerateDetectedDevices(
hDeviceKey,
&DeviceName,
hRootKey,
TRUE,
BootResources,
BootResourcesLength);
if (!NT_SUCCESS(Status))
goto cleanup;
}
}
/* Read identifier */
Status = ZwQueryValueKey(hDeviceKey, &IdentifierU, KeyValuePartialInformation, pValueInformation, ValueInfoLength, &RequiredSize);
if (Status == STATUS_BUFFER_OVERFLOW || Status == STATUS_BUFFER_TOO_SMALL)
{
ExFreePool(pValueInformation);
ValueInfoLength = RequiredSize;
pValueInformation = ExAllocatePool(PagedPool, ValueInfoLength);
if (!pValueInformation)
{
DPRINT("ExAllocatePool() failed\n");
Status = STATUS_NO_MEMORY;
goto cleanup;
}
Status = ZwQueryValueKey(hDeviceKey, &IdentifierU, KeyValuePartialInformation, pValueInformation, ValueInfoLength, &RequiredSize);
}
if (!NT_SUCCESS(Status))
{
if (Status != STATUS_OBJECT_NAME_NOT_FOUND)
{
DPRINT("ZwQueryValueKey() failed with status 0x%08lx\n", Status);
goto nextdevice;
}
ValueName.Length = ValueName.MaximumLength = 0;
}
else if (pValueInformation->Type != REG_SZ)
{
DPRINT("Wrong registry type: got 0x%lx, expected 0x%lx\n", pValueInformation->Type, REG_SZ);
goto nextdevice;
}
else
{
/* Assign hardware id to this device */
ValueName.Length = ValueName.MaximumLength = (USHORT)pValueInformation->DataLength;
ValueName.Buffer = (PWCHAR)pValueInformation->Data;
if (ValueName.Length >= sizeof(WCHAR) && ValueName.Buffer[ValueName.Length / sizeof(WCHAR) - 1] == UNICODE_NULL)
ValueName.Length -= sizeof(WCHAR);
}
if (RelativePath && RtlCompareUnicodeString(RelativePath, &IdentifierSerial, FALSE) == 0)
{
pHardwareId = &HardwareIdSerial;
DeviceIndex = DeviceIndexSerial++;
}
else if (RelativePath && RtlCompareUnicodeString(RelativePath, &IdentifierKeyboard, FALSE) == 0)
{
pHardwareId = &HardwareIdKeyboard;
DeviceIndex = DeviceIndexKeyboard++;
}
else if (RelativePath && RtlCompareUnicodeString(RelativePath, &IdentifierMouse, FALSE) == 0)
{
pHardwareId = &HardwareIdMouse;
DeviceIndex = DeviceIndexMouse++;
}
else if (RelativePath && RtlCompareUnicodeString(RelativePath, &IdentifierParallel, FALSE) == 0)
{
pHardwareId = &HardwareIdParallel;
DeviceIndex = DeviceIndexParallel++;
}
else if (RelativePath && RtlCompareUnicodeString(RelativePath, &IdentifierFloppy, FALSE) == 0)
{
pHardwareId = &HardwareIdFloppy;
DeviceIndex = DeviceIndexFloppy++;
}
else
{
/* Unknown key path */
DPRINT("Unknown key path '%wZ'\n", RelativePath);
goto nextdevice;
}
/* Prepare hardware id key (hardware id value without final \0) */
HardwareIdKey = *pHardwareId;
HardwareIdKey.Length -= sizeof(UNICODE_NULL);
/* Add the detected device to Root key */
InitializeObjectAttributes(&ObjectAttributes, &HardwareIdKey, OBJ_KERNEL_HANDLE, hRootKey, NULL);
Status = ZwCreateKey(
&hLevel1Key,
KEY_CREATE_SUB_KEY,
&ObjectAttributes,
0,
NULL,
REG_OPTION_NON_VOLATILE,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
goto nextdevice;
}
swprintf(Level2Name, L"%04lu", DeviceIndex);
RtlInitUnicodeString(&Level2NameU, Level2Name);
InitializeObjectAttributes(&ObjectAttributes, &Level2NameU, OBJ_KERNEL_HANDLE, hLevel1Key, NULL);
Status = ZwCreateKey(
&hLevel2Key,
KEY_SET_VALUE | KEY_CREATE_SUB_KEY,
&ObjectAttributes,
0,
NULL,
REG_OPTION_NON_VOLATILE,
NULL);
ZwClose(hLevel1Key);
if (!NT_SUCCESS(Status))
{
DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
goto nextdevice;
}
DPRINT("Found %wZ #%lu (%wZ)\n", &ValueName, DeviceIndex, &HardwareIdKey);
Status = ZwSetValueKey(hLevel2Key, &HardwareIDU, 0, REG_MULTI_SZ, pHardwareId->Buffer, pHardwareId->MaximumLength);
if (!NT_SUCCESS(Status))
{
DPRINT("ZwSetValueKey() failed with status 0x%08lx\n", Status);
ZwDeleteKey(hLevel2Key);
goto nextdevice;
}
/* Create 'LogConf' subkey */
InitializeObjectAttributes(&ObjectAttributes, &LogConfU, OBJ_KERNEL_HANDLE, hLevel2Key, NULL);
Status = ZwCreateKey(
&hLogConf,
KEY_SET_VALUE,
&ObjectAttributes,
0,
NULL,
REG_OPTION_VOLATILE,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT("ZwCreateKey() failed with status 0x%08lx\n", Status);
ZwDeleteKey(hLevel2Key);
goto nextdevice;
}
if (BootResourcesLength >= sizeof(CM_FULL_RESOURCE_DESCRIPTOR))
{
CmResourceList = ExAllocatePool(PagedPool, BootResourcesLength + sizeof(ULONG));
if (!CmResourceList)
{
ZwClose(hLogConf);
ZwDeleteKey(hLevel2Key);
goto nextdevice;
}
/* Add the list count (1st member of CM_RESOURCE_LIST) */
ListCount = 1;
RtlCopyMemory(CmResourceList,
&ListCount,
sizeof(ULONG));
/* Now add the actual list (2nd member of CM_RESOURCE_LIST) */
RtlCopyMemory(CmResourceList + sizeof(ULONG),
BootResources,
BootResourcesLength);
/* Save boot resources to 'LogConf\BootConfig' */
Status = ZwSetValueKey(hLogConf, &BootConfigU, 0, REG_RESOURCE_LIST, CmResourceList, BootResourcesLength + sizeof(ULONG));
if (!NT_SUCCESS(Status))
{
DPRINT("ZwSetValueKey() failed with status 0x%08lx\n", Status);
ZwClose(hLogConf);
ZwDeleteKey(hLevel2Key);
goto nextdevice;
}
}
ZwClose(hLogConf);
nextdevice:
if (BootResources && BootResources != ParentBootResources)
{
ExFreePool(BootResources);
BootResources = NULL;
}
if (hLevel2Key)
{
ZwClose(hLevel2Key);
hLevel2Key = NULL;
}
if (hDeviceKey)
{
ZwClose(hDeviceKey);
hDeviceKey = NULL;
}
}
Status = STATUS_SUCCESS;
cleanup:
if (hDevicesKey && hDevicesKey != hBaseKey)
ZwClose(hDevicesKey);
if (hDeviceKey)
ZwClose(hDeviceKey);
if (pDeviceInformation)
ExFreePool(pDeviceInformation);
if (pValueInformation)
ExFreePool(pValueInformation);
return Status;
}
static
CODE_SEG("INIT")
BOOLEAN
IopIsFirmwareMapperDisabled(VOID)
{
UNICODE_STRING KeyPathU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\SYSTEM\\CURRENTCONTROLSET\\Control\\Pnp");
UNICODE_STRING KeyNameU = RTL_CONSTANT_STRING(L"DisableFirmwareMapper");
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE hPnpKey;
PKEY_VALUE_PARTIAL_INFORMATION KeyInformation;
ULONG DesiredLength, Length;
ULONG KeyValue = 0;
NTSTATUS Status;
InitializeObjectAttributes(&ObjectAttributes, &KeyPathU, OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = ZwOpenKey(&hPnpKey, KEY_QUERY_VALUE, &ObjectAttributes);
if (NT_SUCCESS(Status))
{
Status = ZwQueryValueKey(hPnpKey,
&KeyNameU,
KeyValuePartialInformation,
NULL,
0,
&DesiredLength);
if ((Status == STATUS_BUFFER_TOO_SMALL) ||
(Status == STATUS_BUFFER_OVERFLOW))
{
Length = DesiredLength;
KeyInformation = ExAllocatePool(PagedPool, Length);
if (KeyInformation)
{
Status = ZwQueryValueKey(hPnpKey,
&KeyNameU,
KeyValuePartialInformation,
KeyInformation,
Length,
&DesiredLength);
if (NT_SUCCESS(Status) && KeyInformation->DataLength == sizeof(ULONG))
{
KeyValue = (ULONG)(*KeyInformation->Data);
}
else
{
DPRINT1("ZwQueryValueKey(%wZ%wZ) failed\n", &KeyPathU, &KeyNameU);
}
ExFreePool(KeyInformation);
}
else
{
DPRINT1("Failed to allocate memory for registry query\n");
}
}
else
{
DPRINT1("ZwQueryValueKey(%wZ%wZ) failed with status 0x%08lx\n", &KeyPathU, &KeyNameU, Status);
}
ZwClose(hPnpKey);
}
else
{
DPRINT1("ZwOpenKey(%wZ) failed with status 0x%08lx\n", &KeyPathU, Status);
}
DPRINT("Firmware mapper is %s\n", KeyValue != 0 ? "disabled" : "enabled");
return (KeyValue != 0) ? TRUE : FALSE;
}
CODE_SEG("INIT")
NTSTATUS
NTAPI
IopUpdateRootKey(VOID)
{
UNICODE_STRING EnumU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Enum");
UNICODE_STRING RootPathU = RTL_CONSTANT_STRING(L"Root");
UNICODE_STRING MultiKeyPathU = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\HARDWARE\\DESCRIPTION\\System\\MultifunctionAdapter");
OBJECT_ATTRIBUTES ObjectAttributes;
HANDLE hEnum, hRoot;
NTSTATUS Status;
InitializeObjectAttributes(&ObjectAttributes, &EnumU, OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = ZwCreateKey(&hEnum, KEY_CREATE_SUB_KEY, &ObjectAttributes, 0, NULL, REG_OPTION_NON_VOLATILE, NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwCreateKey() failed with status 0x%08lx\n", Status);
return Status;
}
InitializeObjectAttributes(&ObjectAttributes, &RootPathU, OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, hEnum, NULL);
Status = ZwCreateKey(&hRoot, KEY_CREATE_SUB_KEY, &ObjectAttributes, 0, NULL, REG_OPTION_NON_VOLATILE, NULL);
ZwClose(hEnum);
if (!NT_SUCCESS(Status))
{
DPRINT1("ZwOpenKey() failed with status 0x%08lx\n", Status);
return Status;
}
if (!IopIsFirmwareMapperDisabled())
{
Status = IopOpenRegistryKeyEx(&hEnum, NULL, &MultiKeyPathU, KEY_ENUMERATE_SUB_KEYS);
if (!NT_SUCCESS(Status))
{
/* Nothing to do, don't return with an error status */
DPRINT("ZwOpenKey() failed with status 0x%08lx\n", Status);
ZwClose(hRoot);
return STATUS_SUCCESS;
}
Status = IopEnumerateDetectedDevices(
hEnum,
NULL,
hRoot,
TRUE,
NULL,
0);
ZwClose(hEnum);
}
else
{
/* Enumeration is disabled */
Status = STATUS_SUCCESS;
}
ZwClose(hRoot);
return Status;
}
NTSTATUS
NTAPI
IopOpenRegistryKeyEx(PHANDLE KeyHandle,
HANDLE ParentKey,
PUNICODE_STRING Name,
ACCESS_MASK DesiredAccess)
{
OBJECT_ATTRIBUTES ObjectAttributes;
NTSTATUS Status;
PAGED_CODE();
*KeyHandle = NULL;
InitializeObjectAttributes(&ObjectAttributes,
Name,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
ParentKey,
NULL);
Status = ZwOpenKey(KeyHandle, DesiredAccess, &ObjectAttributes);
return Status;
}
NTSTATUS
NTAPI
IopCreateRegistryKeyEx(OUT PHANDLE Handle,
IN HANDLE RootHandle OPTIONAL,
IN PUNICODE_STRING KeyName,
IN ACCESS_MASK DesiredAccess,
IN ULONG CreateOptions,
OUT PULONG Disposition OPTIONAL)
{
OBJECT_ATTRIBUTES ObjectAttributes;
ULONG KeyDisposition, RootHandleIndex = 0, i = 1, NestedCloseLevel = 0;
USHORT Length;
HANDLE HandleArray[2];
BOOLEAN Recursing = TRUE;
PWCHAR pp, p, p1;
UNICODE_STRING KeyString;
NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE();
/* P1 is start, pp is end */
p1 = KeyName->Buffer;
pp = (PVOID)((ULONG_PTR)p1 + KeyName->Length);
/* Create the target key */
InitializeObjectAttributes(&ObjectAttributes,
KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
RootHandle,
NULL);
Status = ZwCreateKey(&HandleArray[i],
DesiredAccess,
&ObjectAttributes,
0,
NULL,
CreateOptions,
&KeyDisposition);
/* Now we check if this failed */
if ((Status == STATUS_OBJECT_NAME_NOT_FOUND) && (RootHandle))
{
/* Target key failed, so we'll need to create its parent. Setup array */
HandleArray[0] = NULL;
HandleArray[1] = RootHandle;
/* Keep recursing for each missing parent */
while (Recursing)
{
/* And if we're deep enough, close the last handle */
if (NestedCloseLevel > 1) ZwClose(HandleArray[RootHandleIndex]);
/* We're setup to ping-pong between the two handle array entries */
RootHandleIndex = i;
i = (i + 1) & 1;
/* Clear the one we're attempting to open now */
HandleArray[i] = NULL;
/* Process the parent key name */
for (p = p1; ((p < pp) && (*p != OBJ_NAME_PATH_SEPARATOR)); p++);
Length = (USHORT)(p - p1) * sizeof(WCHAR);
/* Is there a parent name? */
if (Length)
{
/* Build the unicode string for it */
KeyString.Buffer = p1;
KeyString.Length = KeyString.MaximumLength = Length;
/* Now try opening the parent */
InitializeObjectAttributes(&ObjectAttributes,
&KeyString,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
HandleArray[RootHandleIndex],
NULL);
Status = ZwCreateKey(&HandleArray[i],
DesiredAccess,
&ObjectAttributes,
0,
NULL,
CreateOptions,
&KeyDisposition);
if (NT_SUCCESS(Status))
{
/* It worked, we have one more handle */
NestedCloseLevel++;
}
else
{
/* Parent key creation failed, abandon loop */
Recursing = FALSE;
continue;
}
}
else
{
/* We don't have a parent name, probably corrupted key name */
Status = STATUS_INVALID_PARAMETER;
Recursing = FALSE;
continue;
}
/* Now see if there's more parents to create */
p1 = p + 1;
if ((p == pp) || (p1 == pp))
{
/* We're done, hopefully successfully, so stop */
Recursing = FALSE;
}
}
/* Outer loop check for handle nesting that requires closing the top handle */
if (NestedCloseLevel > 1) ZwClose(HandleArray[RootHandleIndex]);
}
/* Check if we broke out of the loop due to success */
if (NT_SUCCESS(Status))
{
/* Return the target handle (we closed all the parent ones) and disposition */
*Handle = HandleArray[i];
if (Disposition) *Disposition = KeyDisposition;
}
/* Return the success state */
return Status;
}
NTSTATUS
NTAPI
IopGetRegistryValue(IN HANDLE Handle,
IN PWSTR ValueName,
OUT PKEY_VALUE_FULL_INFORMATION *Information)
{
UNICODE_STRING ValueString;
NTSTATUS Status;
PKEY_VALUE_FULL_INFORMATION FullInformation;
ULONG Size;
PAGED_CODE();
RtlInitUnicodeString(&ValueString, ValueName);
Status = ZwQueryValueKey(Handle,
&ValueString,
KeyValueFullInformation,
NULL,
0,
&Size);
if ((Status != STATUS_BUFFER_OVERFLOW) &&
(Status != STATUS_BUFFER_TOO_SMALL))
{
return Status;
}
FullInformation = ExAllocatePool(NonPagedPool, Size);
if (!FullInformation) return STATUS_INSUFFICIENT_RESOURCES;
Status = ZwQueryValueKey(Handle,
&ValueString,
KeyValueFullInformation,
FullInformation,
Size,
&Size);
if (!NT_SUCCESS(Status))
{
ExFreePool(FullInformation);
return Status;
}
*Information = FullInformation;
return STATUS_SUCCESS;
}
RTL_GENERIC_COMPARE_RESULTS
NTAPI
PiCompareInstancePath(IN PRTL_AVL_TABLE Table,
IN PVOID FirstStruct,
IN PVOID SecondStruct)
{
/* FIXME: TODO */
ASSERT(FALSE);
return 0;
}
//
// The allocation function is called by the generic table package whenever
// it needs to allocate memory for the table.
//
PVOID
NTAPI
PiAllocateGenericTableEntry(IN PRTL_AVL_TABLE Table,
IN CLONG ByteSize)
{
/* FIXME: TODO */
ASSERT(FALSE);
return NULL;
}
VOID
NTAPI
PiFreeGenericTableEntry(IN PRTL_AVL_TABLE Table,
IN PVOID Buffer)
{
/* FIXME: TODO */
ASSERT(FALSE);
}
VOID
NTAPI
PpInitializeDeviceReferenceTable(VOID)
{
/* Setup the guarded mutex and AVL table */
KeInitializeGuardedMutex(&PpDeviceReferenceTableLock);
RtlInitializeGenericTableAvl(
&PpDeviceReferenceTable,
(PRTL_AVL_COMPARE_ROUTINE)PiCompareInstancePath,
(PRTL_AVL_ALLOCATE_ROUTINE)PiAllocateGenericTableEntry,
(PRTL_AVL_FREE_ROUTINE)PiFreeGenericTableEntry,
NULL);
}
BOOLEAN
NTAPI
PiInitPhase0(VOID)
{
/* Initialize the resource when accessing device registry data */
ExInitializeResourceLite(&PpRegistryDeviceResource);
/* Setup the device reference AVL table */
PpInitializeDeviceReferenceTable();
return TRUE;
}
BOOLEAN
NTAPI
PpInitSystem(VOID)
{
/* Check the initialization phase */
switch (ExpInitializationPhase)
{
case 0:
/* Do Phase 0 */
return PiInitPhase0();
case 1:
/* Do Phase 1 */
return TRUE;
//return PiInitPhase1();
default:
/* Don't know any other phase! Bugcheck! */
KeBugCheck(UNEXPECTED_INITIALIZATION_CALL);
return FALSE;
}
}
/* PUBLIC FUNCTIONS **********************************************************/
NTSTATUS
NTAPI
PnpBusTypeGuidGet(IN USHORT Index,
IN LPGUID BusTypeGuid)
{
NTSTATUS Status = STATUS_SUCCESS;
/* Acquire the lock */
ExAcquireFastMutex(&PnpBusTypeGuidList->Lock);
/* Validate size */
if (Index < PnpBusTypeGuidList->GuidCount)
{
/* Copy the data */
RtlCopyMemory(BusTypeGuid, &PnpBusTypeGuidList->Guids[Index], sizeof(GUID));
}
else
{
/* Failure path */
Status = STATUS_OBJECT_NAME_NOT_FOUND;
}
/* Release lock and return status */
ExReleaseFastMutex(&PnpBusTypeGuidList->Lock);
return Status;
}
NTSTATUS
NTAPI
PnpDeviceObjectToDeviceInstance(IN PDEVICE_OBJECT DeviceObject,
IN PHANDLE DeviceInstanceHandle,
IN ACCESS_MASK DesiredAccess)
{
NTSTATUS Status;
HANDLE KeyHandle;
PDEVICE_NODE DeviceNode;
UNICODE_STRING KeyName = RTL_CONSTANT_STRING(L"\\REGISTRY\\MACHINE\\SYSTEM\\CURRENTCONTROLSET\\ENUM");
PAGED_CODE();
/* Open the enum key */
Status = IopOpenRegistryKeyEx(&KeyHandle,
NULL,
&KeyName,
KEY_READ);
if (!NT_SUCCESS(Status)) return Status;
/* Make sure we have an instance path */
DeviceNode = IopGetDeviceNode(DeviceObject);
if ((DeviceNode) && (DeviceNode->InstancePath.Length))
{
/* Get the instance key */
Status = IopOpenRegistryKeyEx(DeviceInstanceHandle,
KeyHandle,
&DeviceNode->InstancePath,
DesiredAccess);
}
else
{
/* Fail */
Status = STATUS_INVALID_DEVICE_REQUEST;
}
/* Close the handle and return status */
ZwClose(KeyHandle);
return Status;
}
ULONG
NTAPI
PnpDetermineResourceListSize(IN PCM_RESOURCE_LIST ResourceList)
{
ULONG FinalSize, PartialSize, EntrySize, i, j;
PCM_FULL_RESOURCE_DESCRIPTOR FullDescriptor;
PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
/* If we don't have one, that's easy */
if (!ResourceList) return 0;
/* Start with the minimum size possible */
FinalSize = FIELD_OFFSET(CM_RESOURCE_LIST, List);
/* Loop each full descriptor */
FullDescriptor = ResourceList->List;
for (i = 0; i < ResourceList->Count; i++)
{
/* Start with the minimum size possible */
PartialSize = FIELD_OFFSET(CM_FULL_RESOURCE_DESCRIPTOR, PartialResourceList) +
FIELD_OFFSET(CM_PARTIAL_RESOURCE_LIST, PartialDescriptors);
/* Loop each partial descriptor */
PartialDescriptor = FullDescriptor->PartialResourceList.PartialDescriptors;
for (j = 0; j < FullDescriptor->PartialResourceList.Count; j++)
{
/* Start with the minimum size possible */
EntrySize = sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
/* Check if there is extra data */
if (PartialDescriptor->Type == CmResourceTypeDeviceSpecific)
{
/* Add that data */
EntrySize += PartialDescriptor->u.DeviceSpecificData.DataSize;
}
/* The size of partial descriptors is bigger */
PartialSize += EntrySize;
/* Go to the next partial descriptor */
PartialDescriptor = (PVOID)((ULONG_PTR)PartialDescriptor + EntrySize);
}
/* The size of full descriptors is bigger */
FinalSize += PartialSize;
/* Go to the next full descriptor */
FullDescriptor = (PVOID)((ULONG_PTR)FullDescriptor + PartialSize);
}
/* Return the final size */
return FinalSize;
}
NTSTATUS
NTAPI
PiGetDeviceRegistryProperty(IN PDEVICE_OBJECT DeviceObject,
IN ULONG ValueType,
IN PWSTR ValueName,
IN PWSTR KeyName,
OUT PVOID Buffer,
IN PULONG BufferLength)
{
NTSTATUS Status;
HANDLE KeyHandle, SubHandle;
UNICODE_STRING KeyString;
PKEY_VALUE_FULL_INFORMATION KeyValueInfo = NULL;
ULONG Length;
PAGED_CODE();
/* Find the instance key */
Status = PnpDeviceObjectToDeviceInstance(DeviceObject, &KeyHandle, KEY_READ);
if (NT_SUCCESS(Status))
{
/* Check for name given by caller */
if (KeyName)
{
/* Open this key */
RtlInitUnicodeString(&KeyString, KeyName);
Status = IopOpenRegistryKeyEx(&SubHandle,
KeyHandle,
&KeyString,
KEY_READ);
if (NT_SUCCESS(Status))
{
/* And use this handle instead */
ZwClose(KeyHandle);
KeyHandle = SubHandle;
}
}
/* Check if sub-key handle succeeded (or no-op if no key name given) */
if (NT_SUCCESS(Status))
{
/* Now get the size of the property */
Status = IopGetRegistryValue(KeyHandle,
ValueName,
&KeyValueInfo);
}
/* Close the key */
ZwClose(KeyHandle);
}
/* Fail if any of the registry operations failed */
if (!NT_SUCCESS(Status)) return Status;
/* Check how much data we have to copy */
Length = KeyValueInfo->DataLength;
if (*BufferLength >= Length)
{
/* Check for a match in the value type */
if (KeyValueInfo->Type == ValueType)
{
/* Copy the data */
RtlCopyMemory(Buffer,
(PVOID)((ULONG_PTR)KeyValueInfo +
KeyValueInfo->DataOffset),
Length);
}
else
{
/* Invalid registry property type, fail */
Status = STATUS_INVALID_PARAMETER_2;
}
}
else
{
/* Buffer is too small to hold data */
Status = STATUS_BUFFER_TOO_SMALL;
}
/* Return the required buffer length, free the buffer, and return status */
*BufferLength = Length;
ExFreePool(KeyValueInfo);
return Status;
}
#define PIP_RETURN_DATA(x, y) {ReturnLength = x; Data = y; Status = STATUS_SUCCESS; break;}
#define PIP_REGISTRY_DATA(x, y) {ValueName = x; ValueType = y; break;}
#define PIP_UNIMPLEMENTED() {UNIMPLEMENTED_DBGBREAK(); break;}
/*
* @implemented
*/
NTSTATUS
NTAPI
IoGetDeviceProperty(IN PDEVICE_OBJECT DeviceObject,
IN DEVICE_REGISTRY_PROPERTY DeviceProperty,
IN ULONG BufferLength,
OUT PVOID PropertyBuffer,
OUT PULONG ResultLength)
{
PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
DEVICE_CAPABILITIES DeviceCaps;
ULONG ReturnLength = 0, Length = 0, ValueType;
PWCHAR ValueName = NULL, EnumeratorNameEnd, DeviceInstanceName;
PVOID Data = NULL;
NTSTATUS Status = STATUS_BUFFER_TOO_SMALL;
GUID BusTypeGuid;
POBJECT_NAME_INFORMATION ObjectNameInfo = NULL;
BOOLEAN NullTerminate = FALSE;
DEVICE_REMOVAL_POLICY Policy;
DPRINT("IoGetDeviceProperty(0x%p %d)\n", DeviceObject, DeviceProperty);
/* Assume failure */
*ResultLength = 0;
/* Only PDOs can call this */
if (!DeviceNode) return STATUS_INVALID_DEVICE_REQUEST;
/* Handle all properties */
switch (DeviceProperty)
{
case DevicePropertyBusTypeGuid:
/* Get the GUID from the internal cache */
Status = PnpBusTypeGuidGet(DeviceNode->ChildBusTypeIndex, &BusTypeGuid);
if (!NT_SUCCESS(Status)) return Status;
/* This is the format of the returned data */
PIP_RETURN_DATA(sizeof(GUID), &BusTypeGuid);
case DevicePropertyLegacyBusType:
/* Validate correct interface type */
if (DeviceNode->ChildInterfaceType == InterfaceTypeUndefined)
return STATUS_OBJECT_NAME_NOT_FOUND;
/* This is the format of the returned data */
PIP_RETURN_DATA(sizeof(INTERFACE_TYPE), &DeviceNode->ChildInterfaceType);
case DevicePropertyBusNumber:
/* Validate correct bus number */
if ((DeviceNode->ChildBusNumber & 0x80000000) == 0x80000000)
return STATUS_OBJECT_NAME_NOT_FOUND;
/* This is the format of the returned data */
PIP_RETURN_DATA(sizeof(ULONG), &DeviceNode->ChildBusNumber);
case DevicePropertyEnumeratorName:
/* Get the instance path */
DeviceInstanceName = DeviceNode->InstancePath.Buffer;
/* Sanity checks */
ASSERT((BufferLength & 1) == 0);
ASSERT(DeviceInstanceName != NULL);
/* Get the name from the path */
EnumeratorNameEnd = wcschr(DeviceInstanceName, OBJ_NAME_PATH_SEPARATOR);
ASSERT(EnumeratorNameEnd);
/* This string needs to be NULL-terminated */
NullTerminate = TRUE;
/* This is the format of the returned data */
PIP_RETURN_DATA((ULONG)(EnumeratorNameEnd - DeviceInstanceName) * sizeof(WCHAR),
DeviceInstanceName);
case DevicePropertyAddress:
/* Query the device caps */
Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCaps);
if (!NT_SUCCESS(Status) || (DeviceCaps.Address == MAXULONG))
return STATUS_OBJECT_NAME_NOT_FOUND;
/* This is the format of the returned data */
PIP_RETURN_DATA(sizeof(ULONG), &DeviceCaps.Address);
case DevicePropertyBootConfigurationTranslated:
/* Validate we have resources */
if (!DeviceNode->BootResources)
// if (!DeviceNode->BootResourcesTranslated) // FIXFIX: Need this field
{
/* No resources will still fake success, but with 0 bytes */
*ResultLength = 0;
return STATUS_SUCCESS;
}
/* This is the format of the returned data */
PIP_RETURN_DATA(PnpDetermineResourceListSize(DeviceNode->BootResources), // FIXFIX: Should use BootResourcesTranslated
DeviceNode->BootResources); // FIXFIX: Should use BootResourcesTranslated
case DevicePropertyPhysicalDeviceObjectName:
/* Sanity check for Unicode-sized string */
ASSERT((BufferLength & 1) == 0);
/* Allocate name buffer */
Length = BufferLength + sizeof(OBJECT_NAME_INFORMATION);
ObjectNameInfo = ExAllocatePool(PagedPool, Length);
if (!ObjectNameInfo) return STATUS_INSUFFICIENT_RESOURCES;
/* Query the PDO name */
Status = ObQueryNameString(DeviceObject,
ObjectNameInfo,
Length,
ResultLength);
if (Status == STATUS_INFO_LENGTH_MISMATCH)
{
/* It's up to the caller to try again */
Status = STATUS_BUFFER_TOO_SMALL;
}
/* This string needs to be NULL-terminated */
NullTerminate = TRUE;
/* Return if successful */
if (NT_SUCCESS(Status)) PIP_RETURN_DATA(ObjectNameInfo->Name.Length,
ObjectNameInfo->Name.Buffer);
/* Let the caller know how big the name is */
*ResultLength -= sizeof(OBJECT_NAME_INFORMATION);
break;
case DevicePropertyRemovalPolicy:
Policy = DeviceNode->RemovalPolicy;
PIP_RETURN_DATA(sizeof(Policy), &Policy);
/* Handle the registry-based properties */
case DevicePropertyUINumber:
PIP_REGISTRY_DATA(REGSTR_VAL_UI_NUMBER, REG_DWORD);
case DevicePropertyLocationInformation:
PIP_REGISTRY_DATA(REGSTR_VAL_LOCATION_INFORMATION, REG_SZ);
case DevicePropertyDeviceDescription:
PIP_REGISTRY_DATA(REGSTR_VAL_DEVDESC, REG_SZ);
case DevicePropertyHardwareID:
PIP_REGISTRY_DATA(REGSTR_VAL_HARDWAREID, REG_MULTI_SZ);
case DevicePropertyCompatibleIDs:
PIP_REGISTRY_DATA(REGSTR_VAL_COMPATIBLEIDS, REG_MULTI_SZ);
case DevicePropertyBootConfiguration:
PIP_REGISTRY_DATA(REGSTR_VAL_BOOTCONFIG, REG_RESOURCE_LIST);
case DevicePropertyClassName:
PIP_REGISTRY_DATA(REGSTR_VAL_CLASS, REG_SZ);
case DevicePropertyClassGuid:
PIP_REGISTRY_DATA(REGSTR_VAL_CLASSGUID, REG_SZ);
case DevicePropertyDriverKeyName:
PIP_REGISTRY_DATA(REGSTR_VAL_DRIVER, REG_SZ);
case DevicePropertyManufacturer:
PIP_REGISTRY_DATA(REGSTR_VAL_MFG, REG_SZ);
case DevicePropertyFriendlyName:
PIP_REGISTRY_DATA(REGSTR_VAL_FRIENDLYNAME, REG_SZ);
case DevicePropertyContainerID:
//PIP_REGISTRY_DATA(REGSTR_VAL_CONTAINERID, REG_SZ); // Win7
PIP_UNIMPLEMENTED();
break;
case DevicePropertyInstallState:
PIP_REGISTRY_DATA(REGSTR_VAL_CONFIGFLAGS, REG_DWORD);
break;
case DevicePropertyResourceRequirements:
PIP_UNIMPLEMENTED();
case DevicePropertyAllocatedResources:
PIP_UNIMPLEMENTED();
default:
return STATUS_INVALID_PARAMETER_2;
}
/* Having a registry value name implies registry data */
if (ValueName)
{
/* We know up-front how much data to expect */
*ResultLength = BufferLength;
/* Go get the data, use the LogConf subkey if necessary */
Status = PiGetDeviceRegistryProperty(DeviceObject,
ValueType,
ValueName,
(DeviceProperty ==
DevicePropertyBootConfiguration) ?
L"LogConf": NULL,
PropertyBuffer,
ResultLength);
}
else if (NT_SUCCESS(Status))
{
/* We know up-front how much data to expect, check the caller's buffer */
*ResultLength = ReturnLength + (NullTerminate ? sizeof(UNICODE_NULL) : 0);
if (*ResultLength <= BufferLength)
{
/* Buffer is all good, copy the data */
RtlCopyMemory(PropertyBuffer, Data, ReturnLength);
/* Check if we need to NULL-terminate the string */
if (NullTerminate)
{
/* Terminate the string */
((PWCHAR)PropertyBuffer)[ReturnLength / sizeof(WCHAR)] = UNICODE_NULL;
}
/* This is the success path */
Status = STATUS_SUCCESS;
}
else
{
/* Failure path */
Status = STATUS_BUFFER_TOO_SMALL;
}
}
/* Free any allocation we may have made, and return the status code */
if (ObjectNameInfo) ExFreePool(ObjectNameInfo);
return Status;
}
/**
* @name IoOpenDeviceRegistryKey
*
* Open a registry key unique for a specified driver or device instance.
*
* @param DeviceObject Device to get the registry key for.
* @param DevInstKeyType Type of the key to return.
* @param DesiredAccess Access mask (eg. KEY_READ | KEY_WRITE).
* @param DevInstRegKey Handle to the opened registry key on
* successful return.
*
* @return Status.
*
* @implemented
*/
NTSTATUS
NTAPI
IoOpenDeviceRegistryKey(IN PDEVICE_OBJECT DeviceObject,
IN ULONG DevInstKeyType,
IN ACCESS_MASK DesiredAccess,
OUT PHANDLE DevInstRegKey)
{
static WCHAR RootKeyName[] =
L"\\Registry\\Machine\\System\\CurrentControlSet\\";
static WCHAR ProfileKeyName[] =
L"Hardware Profiles\\Current\\System\\CurrentControlSet\\";
static WCHAR ClassKeyName[] = L"Control\\Class\\";
static WCHAR EnumKeyName[] = L"Enum\\";
static WCHAR DeviceParametersKeyName[] = L"Device Parameters";
ULONG KeyNameLength;
PWSTR KeyNameBuffer;
UNICODE_STRING KeyName;
ULONG DriverKeyLength;
OBJECT_ATTRIBUTES ObjectAttributes;
PDEVICE_NODE DeviceNode = NULL;
NTSTATUS Status;
DPRINT("IoOpenDeviceRegistryKey() called\n");
if ((DevInstKeyType & (PLUGPLAY_REGKEY_DEVICE | PLUGPLAY_REGKEY_DRIVER)) == 0)
{
DPRINT1("IoOpenDeviceRegistryKey(): got wrong params, exiting... \n");
return STATUS_INVALID_PARAMETER;
}
if (!IopIsValidPhysicalDeviceObject(DeviceObject))
return STATUS_INVALID_DEVICE_REQUEST;
DeviceNode = IopGetDeviceNode(DeviceObject);
/*
* Calculate the length of the base key name. This is the full
* name for driver key or the name excluding "Device Parameters"
* subkey for device key.
*/
KeyNameLength = sizeof(RootKeyName);
if (DevInstKeyType & PLUGPLAY_REGKEY_CURRENT_HWPROFILE)
KeyNameLength += sizeof(ProfileKeyName) - sizeof(UNICODE_NULL);
if (DevInstKeyType & PLUGPLAY_REGKEY_DRIVER)
{
KeyNameLength += sizeof(ClassKeyName) - sizeof(UNICODE_NULL);
Status = IoGetDeviceProperty(DeviceObject, DevicePropertyDriverKeyName,
0, NULL, &DriverKeyLength);
if (Status != STATUS_BUFFER_TOO_SMALL)
return Status;
KeyNameLength += DriverKeyLength;
}
else
{
KeyNameLength += sizeof(EnumKeyName) - sizeof(UNICODE_NULL) +
DeviceNode->InstancePath.Length;
}
/*
* Now allocate the buffer for the key name...
*/
KeyNameBuffer = ExAllocatePool(PagedPool, KeyNameLength);
if (KeyNameBuffer == NULL)
return STATUS_INSUFFICIENT_RESOURCES;
KeyName.Length = 0;
KeyName.MaximumLength = (USHORT)KeyNameLength;
KeyName.Buffer = KeyNameBuffer;
/*
* ...and build the key name.
*/
KeyName.Length += sizeof(RootKeyName) - sizeof(UNICODE_NULL);
RtlCopyMemory(KeyNameBuffer, RootKeyName, KeyName.Length);
if (DevInstKeyType & PLUGPLAY_REGKEY_CURRENT_HWPROFILE)
RtlAppendUnicodeToString(&KeyName, ProfileKeyName);
if (DevInstKeyType & PLUGPLAY_REGKEY_DRIVER)
{
RtlAppendUnicodeToString(&KeyName, ClassKeyName);
Status = IoGetDeviceProperty(DeviceObject, DevicePropertyDriverKeyName,
DriverKeyLength, KeyNameBuffer +
(KeyName.Length / sizeof(WCHAR)),
&DriverKeyLength);
if (!NT_SUCCESS(Status))
{
DPRINT1("Call to IoGetDeviceProperty() failed with Status 0x%08lx\n", Status);
ExFreePool(KeyNameBuffer);
return Status;
}
KeyName.Length += (USHORT)DriverKeyLength - sizeof(UNICODE_NULL);
}
else
{
RtlAppendUnicodeToString(&KeyName, EnumKeyName);
Status = RtlAppendUnicodeStringToString(&KeyName, &DeviceNode->InstancePath);
if (DeviceNode->InstancePath.Length == 0)
{
ExFreePool(KeyNameBuffer);
return Status;
}
}
/*
* Open the base key.
*/
Status = IopOpenRegistryKeyEx(DevInstRegKey, NULL, &KeyName, DesiredAccess);
if (!NT_SUCCESS(Status))
{
DPRINT1("IoOpenDeviceRegistryKey(%wZ): Base key doesn't exist, exiting... (Status 0x%08lx)\n", &KeyName, Status);
ExFreePool(KeyNameBuffer);
return Status;
}
ExFreePool(KeyNameBuffer);
/*
* For driver key we're done now.
*/
if (DevInstKeyType & PLUGPLAY_REGKEY_DRIVER)
return Status;
/*
* Let's go further. For device key we must open "Device Parameters"
* subkey and create it if it doesn't exist yet.
*/
RtlInitUnicodeString(&KeyName, DeviceParametersKeyName);
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
*DevInstRegKey,
NULL);
Status = ZwCreateKey(DevInstRegKey,
DesiredAccess,
&ObjectAttributes,
0,
NULL,
REG_OPTION_NON_VOLATILE,
NULL);
ZwClose(ObjectAttributes.RootDirectory);
return Status;
}
/*
* @implemented
*/
VOID
NTAPI
IoInvalidateDeviceRelations(
IN PDEVICE_OBJECT DeviceObject,
IN DEVICE_RELATION_TYPE Type)
{
if (!IopIsValidPhysicalDeviceObject(DeviceObject))
{
KeBugCheckEx(PNP_DETECTED_FATAL_ERROR, 0x2, (ULONG_PTR)DeviceObject, 0, 0);
}
switch (Type)
{
case BusRelations:
/* Enumerate the device */
PiQueueDeviceAction(DeviceObject, PiActionEnumDeviceTree, NULL, NULL);
break;
default:
/* Everything else is not implemented */
break;
}
}
/*
* @implemented
*/
NTSTATUS
NTAPI
IoSynchronousInvalidateDeviceRelations(
IN PDEVICE_OBJECT DeviceObject,
IN DEVICE_RELATION_TYPE Type)
{
PAGED_CODE();
if (!IopIsValidPhysicalDeviceObject(DeviceObject))
{
KeBugCheckEx(PNP_DETECTED_FATAL_ERROR, 0x2, (ULONG_PTR)DeviceObject, 0, 0);
}
switch (Type)
{
case BusRelations:
/* Enumerate the device */
return PiPerformSyncDeviceAction(DeviceObject, PiActionEnumDeviceTree);
case PowerRelations:
/* Not handled yet */
return STATUS_NOT_IMPLEMENTED;
case TargetDeviceRelation:
/* Nothing to do */
return STATUS_SUCCESS;
default:
/* Ejection relations are not supported */
return STATUS_NOT_SUPPORTED;
}
}
/*
* @implemented
*/
BOOLEAN
NTAPI
IoTranslateBusAddress(IN INTERFACE_TYPE InterfaceType,
IN ULONG BusNumber,
IN PHYSICAL_ADDRESS BusAddress,
IN OUT PULONG AddressSpace,
OUT PPHYSICAL_ADDRESS TranslatedAddress)
{
/* FIXME: Notify the resource arbiter */
return HalTranslateBusAddress(InterfaceType,
BusNumber,
BusAddress,
AddressSpace,
TranslatedAddress);
}
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