devaction.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for devaction.c:

Go to the source code of this file.

Classes
struct	_DEVICE_ACTION_REQUEST
struct	_ADD_DEV_DRIVERS_LIST
struct	_ATTACH_FILTER_DRIVERS_CONTEXT

Macros
#define	NDEBUG
#define	MAX_DEVICE_ID_LEN   200
#define	MAX_SEPARATORS_INSTANCEID   0
#define	MAX_SEPARATORS_DEVICEID   1

Typedefs
typedef struct _DEVICE_ACTION_REQUEST	DEVICE_ACTION_REQUEST
typedef struct _DEVICE_ACTION_REQUEST *	PDEVICE_ACTION_REQUEST
typedef enum _ADD_DEV_DRIVER_TYPE	ADD_DEV_DRIVER_TYPE
typedef struct _ADD_DEV_DRIVERS_LIST	ADD_DEV_DRIVERS_LIST
typedef struct _ADD_DEV_DRIVERS_LIST *	PADD_DEV_DRIVERS_LIST
typedef struct _ATTACH_FILTER_DRIVERS_CONTEXT	ATTACH_FILTER_DRIVERS_CONTEXT
typedef struct _ATTACH_FILTER_DRIVERS_CONTEXT *	PATTACH_FILTER_DRIVERS_CONTEXT

Enumerations
enum	_ADD_DEV_DRIVER_TYPE {   LowerFilter , LowerClassFilter , DeviceDriver , UpperFilter ,   UpperClassFilter }

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 NTSTATUS	IopSetServiceEnumData (_In_ PDEVICE_NODE DeviceNode, _In_ HANDLE InstanceHandle)
static BOOLEAN	IopValidateID (_In_ PWCHAR Id, _In_ BUS_QUERY_ID_TYPE QueryType)
static NTSTATUS	IopCreateDeviceInstancePath (_In_ PDEVICE_NODE DeviceNode, _Out_ PUNICODE_STRING InstancePath)
static NTSTATUS NTAPI	PiAttachFilterDriversCallback (PWSTR ValueName, ULONG ValueType, PVOID ValueData, ULONG ValueLength, PVOID Ctx, PVOID EntryContext)
	Loads and/or returns the driver associated with the registry entry if the driver is enabled. In case of an error, sets up a corresponding Problem to the DeviceNode.
static NTSTATUS	PiAttachFilterDrivers (PLIST_ENTRY DriversListHead, PDEVICE_NODE DeviceNode, HANDLE EnumSubKey, HANDLE ClassKey, BOOLEAN Lower, BOOLEAN LoadDrivers)
	Calls PiAttachFilterDriversCallback for filter drivers (if any)
static NTSTATUS	PiCallDriverAddDevice (_In_ PDEVICE_NODE DeviceNode, _In_ BOOLEAN LoadDrivers)
	Loads all drivers for a device node (actual service and filters) and calls their AddDevice routine.
NTSTATUS NTAPI	IopQueryDeviceCapabilities (PDEVICE_NODE DeviceNode, PDEVICE_CAPABILITIES DeviceCaps)
static NTSTATUS	IopQueryHardwareIds (PDEVICE_NODE DeviceNode, HANDLE InstanceKey)
static NTSTATUS	IopQueryCompatibleIds (PDEVICE_NODE DeviceNode, HANDLE InstanceKey)
VOID	PiSetDevNodeText (_In_ PDEVICE_NODE DeviceNode, _In_ HANDLE InstanceKey)
	Sets the DeviceNode's DeviceDesc and LocationInformation registry values.
static NTSTATUS	PiInitializeDevNode (_In_ PDEVICE_NODE DeviceNode)
static NTSTATUS	PiUpdateDeviceState (_In_ PDEVICE_NODE DeviceNode)
	Processes the IoInvalidateDeviceState request.
static NTSTATUS	PiStartDeviceFinal (_In_ PDEVICE_NODE DeviceNode)
static NTSTATUS	PiIrpSendRemoveCheckVpb (_In_ PDEVICE_OBJECT DeviceObject, _In_ UCHAR MinorFunction)
	Sends one of the remove IRPs to the device stack.
NTSTATUS	IopUpdateResourceMapForPnPDevice (IN PDEVICE_NODE DeviceNode)
static VOID NTAPI	IopSendRemoveDevice (IN PDEVICE_OBJECT DeviceObject)
static VOID	IopSendRemoveDeviceRelations (PDEVICE_RELATIONS DeviceRelations)
static VOID	IopSendRemoveChildDevices (PDEVICE_NODE ParentDeviceNode)
static VOID NTAPI	IopSendSurpriseRemoval (IN PDEVICE_OBJECT DeviceObject)
static VOID NTAPI	IopCancelRemoveDevice (IN PDEVICE_OBJECT DeviceObject)
static VOID	IopCancelRemoveChildDevices (PDEVICE_NODE ParentDeviceNode)
static VOID	IopCancelRemoveDeviceRelations (PDEVICE_RELATIONS DeviceRelations)
static NTSTATUS NTAPI	IopQueryRemoveDevice (IN PDEVICE_OBJECT DeviceObject)
static NTSTATUS	IopQueryRemoveChildDevices (PDEVICE_NODE ParentDeviceNode, BOOLEAN Force)
static NTSTATUS	IopQueryRemoveDeviceRelations (PDEVICE_RELATIONS DeviceRelations, BOOLEAN Force)
static NTSTATUS	IopPrepareDeviceForRemoval (IN PDEVICE_OBJECT DeviceObject, BOOLEAN Force)
static NTSTATUS	IopRemoveDevice (PDEVICE_NODE DeviceNode)
static NTSTATUS	PiEnumerateDevice (_In_ PDEVICE_NODE DeviceNode)
static NTSTATUS NTAPI	IopSendEject (IN PDEVICE_OBJECT DeviceObject)
VOID NTAPI	IoRequestDeviceEject (IN PDEVICE_OBJECT PhysicalDeviceObject)
static VOID	PiFakeResourceRebalance (_In_ PDEVICE_NODE DeviceNode)
static VOID	PiDevNodeStateMachine (_In_ PDEVICE_NODE RootNode)
static VOID NTAPI	PipDeviceActionWorker (_In_opt_ PVOID Context)
VOID	PiQueueDeviceAction (_In_ PDEVICE_OBJECT DeviceObject, _In_ DEVICE_ACTION Action, _In_opt_ PKEVENT CompletionEvent, _Out_opt_ NTSTATUS *CompletionStatus)
	Queue a device operation to a worker thread.
NTSTATUS	PiPerformSyncDeviceAction (_In_ PDEVICE_OBJECT DeviceObject, _In_ DEVICE_ACTION Action)
	Perfom a device operation synchronously via PiQueueDeviceAction.

Variables
ERESOURCE	IopDriverLoadResource
BOOLEAN	PnpSystemInit
PDEVICE_NODE	IopRootDeviceNode
BOOLEAN	PnPBootDriversLoaded
BOOLEAN	PnPBootDriversInitialized
LIST_ENTRY	IopDeviceActionRequestList
WORK_QUEUE_ITEM	IopDeviceActionWorkItem
BOOLEAN	IopDeviceActionInProgress
KSPIN_LOCK	IopDeviceActionLock
KEVENT	PiEnumerationFinished
static const WCHAR	ServicesKeyName [] = L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\"

Macro Definition Documentation

MAX_DEVICE_ID_LEN

#define MAX_DEVICE_ID_LEN   200

Definition at line 40 of file devaction.c.

MAX_SEPARATORS_DEVICEID

#define MAX_SEPARATORS_DEVICEID   1

Definition at line 42 of file devaction.c.

MAX_SEPARATORS_INSTANCEID

#define MAX_SEPARATORS_INSTANCEID   0

Definition at line 41 of file devaction.c.

NDEBUG

#define NDEBUG

Definition at line 29 of file devaction.c.

Typedef Documentation

ADD_DEV_DRIVER_TYPE

typedef enum _ADD_DEV_DRIVER_TYPE ADD_DEV_DRIVER_TYPE

ADD_DEV_DRIVERS_LIST

typedef struct _ADD_DEV_DRIVERS_LIST ADD_DEV_DRIVERS_LIST

ATTACH_FILTER_DRIVERS_CONTEXT

typedef struct _ATTACH_FILTER_DRIVERS_CONTEXT ATTACH_FILTER_DRIVERS_CONTEXT

DEVICE_ACTION_REQUEST

typedef struct _DEVICE_ACTION_REQUEST DEVICE_ACTION_REQUEST

PADD_DEV_DRIVERS_LIST

typedef struct _ADD_DEV_DRIVERS_LIST * PADD_DEV_DRIVERS_LIST

PATTACH_FILTER_DRIVERS_CONTEXT

typedef struct _ATTACH_FILTER_DRIVERS_CONTEXT * PATTACH_FILTER_DRIVERS_CONTEXT

PDEVICE_ACTION_REQUEST

typedef struct _DEVICE_ACTION_REQUEST * PDEVICE_ACTION_REQUEST

Enumeration Type Documentation

_ADD_DEV_DRIVER_TYPE

enum _ADD_DEV_DRIVER_TYPE

Enumerator
LowerFilter
LowerClassFilter
DeviceDriver
UpperFilter
UpperClassFilter

Definition at line 64 of file devaction.c.

{
    LowerFilter,
    LowerClassFilter,
    DeviceDriver,
    UpperFilter,
    UpperClassFilter
} ADD_DEV_DRIVER_TYPE;

Function Documentation

IopCancelPrepareDeviceForRemoval()

static VOID IopCancelPrepareDeviceForRemoval ( PDEVICE_OBJECT  DeviceObject )

static

Definition at line 1844 of file devaction.c.

{
    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);
}

Referenced by IopCancelRemoveChildDevices(), IopCancelRemoveDeviceRelations(), IopQueryRemoveChildDevices(), and IopQueryRemoveDeviceRelations().

IopCancelRemoveChildDevices()

static VOID IopCancelRemoveChildDevices ( PDEVICE_NODE  ParentDeviceNode )

static

Definition at line 1803 of file devaction.c.

{
    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);
}

Referenced by IoRequestDeviceEject().

IopCancelRemoveDevice()

static VOID NTAPI IopCancelRemoveDevice ( IN PDEVICE_OBJECT  DeviceObject )

static

Definition at line 1793 of file devaction.c.

{
    /* Drivers should never fail a IRP_MN_CANCEL_REMOVE_DEVICE request */
    PiIrpSendRemoveCheckVpb(DeviceObject, IRP_MN_CANCEL_REMOVE_DEVICE);
 
    PiNotifyTargetDeviceChange(&GUID_TARGET_DEVICE_REMOVE_CANCELLED, DeviceObject, NULL);
}

Referenced by IopCancelPrepareDeviceForRemoval(), and IopPrepareDeviceForRemoval().

IopCancelRemoveDeviceRelations()

static VOID IopCancelRemoveDeviceRelations ( PDEVICE_RELATIONS  DeviceRelations )

static

Definition at line 1826 of file devaction.c.

{
    /* 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);
}

Referenced by IopCancelPrepareDeviceForRemoval(), IopPrepareDeviceForRemoval(), and IoRequestDeviceEject().

IopCreateDeviceInstancePath()

static NTSTATUS IopCreateDeviceInstancePath ( _In_ PDEVICE_NODE  DeviceNode, _Out_ PUNICODE_STRING  InstancePath  )

static

Definition at line 213 of file devaction.c.

{
    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))
    {
        if (Status != STATUS_NOT_SUPPORTED)
        {
            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 */
        RtlFreeUnicodeString(&DeviceId);
        return STATUS_PLUGPLAY_NO_DEVICE;
    }
 
    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;
}

Referenced by PiInitializeDevNode().

IopGetBusTypeGuidIndex()

USHORT NTAPI IopGetBusTypeGuidIndex

(

LPGUID

BusTypeGuid

)

Definition at line 411 of file pnpmgr.c.

{
    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;
}

Referenced by PiInitializeDevNode().

IopGetDeviceObjectFromDeviceInstance()

PDEVICE_OBJECT IopGetDeviceObjectFromDeviceInstance

(

PUNICODE_STRING

DeviceInstance

)

Definition at line 118 of file plugplay.c.

{
    DEVICETREE_TRAVERSE_CONTEXT Context;
    IOP_FIND_DEVICE_INSTANCE_TRAVERSE_CONTEXT DeviceInstanceContext;
 
    if (IopRootDeviceNode == NULL)
        return NULL;
 
    if (DeviceInstance == NULL ||
        DeviceInstance->Length == 0)
    {
        if (IopRootDeviceNode->PhysicalDeviceObject)
        {
            ObReferenceObject(IopRootDeviceNode->PhysicalDeviceObject);
            return IopRootDeviceNode->PhysicalDeviceObject;
        }
        else
            return NULL;
    }
 
    /* Traverse the device tree to find the matching device node */
    DeviceInstanceContext.InstancePath = DeviceInstance;
    DeviceInstanceContext.DeviceObject = NULL;
    IopInitDeviceTreeTraverseContext(&Context,
                                     IopRootDeviceNode,
                                     IopFindDeviceInstanceTraverse,
                                     &DeviceInstanceContext);
    (void)IopTraverseDeviceTree(&Context);
 
    /* In case of error or instance not found, this will still be NULL from above. */
    return DeviceInstanceContext.DeviceObject;
}

Referenced by IopDeviceStatus(), IopGetDeviceDepth(), IopGetDeviceProperty(), IopGetDeviceRelations(), IopGetInterfaceDeviceList(), IopGetRelatedDevice(), IopInitializeDevice(), PiControlQueryRemoveDevice(), PiControlSyncDeviceAction(), and PiInitializeDevNode().

IopGetParentIdPrefix()

NTSTATUS IopGetParentIdPrefix	(	PDEVICE_NODE	DeviceNode,
		PUNICODE_STRING	ParentIdPrefix
	)

Definition at line 760 of file pnpmgr.c.

{
    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;
}

Referenced by IopCreateDeviceInstancePath().

IopInstallCriticalDevice()

VOID NTAPI IopInstallCriticalDevice

(

PDEVICE_NODE

DeviceNode

)

Definition at line 45 of file pnpmgr.c.

{
    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);
}

Referenced by PiInitializeDevNode().

IopPrepareDeviceForRemoval() [1/2]

static NTSTATUS IopPrepareDeviceForRemoval ( IN PDEVICE_OBJECT  DeviceObject, BOOLEAN  Force  )

static

Definition at line 1997 of file devaction.c.

{
    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;
}

IopPrepareDeviceForRemoval() [2/2]

static NTSTATUS IopPrepareDeviceForRemoval ( PDEVICE_OBJECT  DeviceObject, BOOLEAN  Force  )

static

Referenced by IopQueryRemoveChildDevices(), IopQueryRemoveDeviceRelations(), IopRemoveDevice(), and IoRequestDeviceEject().

IopQueryCompatibleIds()

static NTSTATUS IopQueryCompatibleIds ( PDEVICE_NODE  DeviceNode, HANDLE  InstanceKey  )

static

Definition at line 1022 of file devaction.c.

{
    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;
}

Referenced by PiInitializeDevNode(), and PiStartDeviceFinal().

IopQueryDeviceCapabilities()

NTSTATUS NTAPI IopQueryDeviceCapabilities	(	PDEVICE_NODE	DeviceNode,
		PDEVICE_CAPABILITIES	DeviceCaps
	)

Definition at line 854 of file devaction.c.

{
    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;
}

Referenced by IoGetDeviceProperty(), IopCreateDeviceInstancePath(), IoRequestDeviceEject(), and PiStartDeviceFinal().

IopQueryHardwareIds()

static NTSTATUS IopQueryHardwareIds ( PDEVICE_NODE  DeviceNode, HANDLE  InstanceKey  )

static

Definition at line 957 of file devaction.c.

{
    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;
}

Referenced by PiInitializeDevNode(), and PiStartDeviceFinal().

IopQueryRemoveChildDevices()

static NTSTATUS IopQueryRemoveChildDevices ( PDEVICE_NODE  ParentDeviceNode, BOOLEAN  Force  )

static

Definition at line 1902 of file devaction.c.

{
    PDEVICE_NODE ChildDeviceNode, NextDeviceNode, FailedRemoveDevice;
    NTSTATUS Status;
    KIRQL OldIrql;
 
    KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
    ChildDeviceNode = ParentDeviceNode->Child;
    while (ChildDeviceNode != NULL)
    {
        NextDeviceNode = ChildDeviceNode->Sibling;
        KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
        PiSetDevNodeState(ChildDeviceNode, DeviceNodeAwaitingQueuedRemoval);
 
        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;
}

Referenced by IopPrepareDeviceForRemoval(), and IoRequestDeviceEject().

IopQueryRemoveDevice()

static NTSTATUS NTAPI IopQueryRemoveDevice ( IN PDEVICE_OBJECT  DeviceObject )

static

Definition at line 1876 of file devaction.c.

{
    PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
    NTSTATUS Status;
 
    ASSERT(DeviceNode);
 
    IopQueueTargetDeviceEvent(&GUID_DEVICE_REMOVE_PENDING,
                              &DeviceNode->InstancePath);
 
    Status = PiIrpSendRemoveCheckVpb(DeviceObject, IRP_MN_QUERY_REMOVE_DEVICE);
 
    PiNotifyTargetDeviceChange(&GUID_TARGET_DEVICE_QUERY_REMOVE, DeviceObject, NULL);
 
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Removal vetoed by %wZ\n", &DeviceNode->InstancePath);
        IopQueueTargetDeviceEvent(&GUID_DEVICE_REMOVAL_VETOED,
                                  &DeviceNode->InstancePath);
    }
 
    return Status;
}

Referenced by IopPrepareDeviceForRemoval().

IopQueryRemoveDeviceRelations()

static NTSTATUS IopQueryRemoveDeviceRelations ( PDEVICE_RELATIONS  DeviceRelations, BOOLEAN  Force  )

static

Definition at line 1956 of file devaction.c.

{
    /* 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;
}

Referenced by IopPrepareDeviceForRemoval(), and IoRequestDeviceEject().

IopRemoveDevice()

static NTSTATUS IopRemoveDevice ( PDEVICE_NODE  DeviceNode )

static

Definition at line 2060 of file devaction.c.

{
    NTSTATUS Status;
 
    // This function removes the device subtree, with the root in DeviceNode
    // atm everyting is in fact done inside this function, which is completely wrong.
    // The right implementation should have a separate removal worker thread and
    // properly do device node state transitions
 
    DPRINT("Removing device: %wZ\n", &DeviceNode->InstancePath);
 
    BOOLEAN surpriseRemoval = (_Bool)(DeviceNode->Flags & DNF_DEVICE_GONE);
 
    Status = IopPrepareDeviceForRemoval(DeviceNode->PhysicalDeviceObject, surpriseRemoval);
 
    if (surpriseRemoval)
    {
        IopSendSurpriseRemoval(DeviceNode->PhysicalDeviceObject);
        IopQueueTargetDeviceEvent(&GUID_DEVICE_SURPRISE_REMOVAL, &DeviceNode->InstancePath);
    }
 
    if (NT_SUCCESS(Status))
    {
        IopSendRemoveDevice(DeviceNode->PhysicalDeviceObject);
        if (surpriseRemoval)
        {
            IopQueueTargetDeviceEvent(&GUID_DEVICE_SAFE_REMOVAL, &DeviceNode->InstancePath);
        }
        return STATUS_SUCCESS;
    }
 
    return Status;
}

Referenced by PiDevNodeStateMachine().

IopSendEject()

static NTSTATUS NTAPI IopSendEject ( IN PDEVICE_OBJECT  DeviceObject )

static

Definition at line 2186 of file devaction.c.

{
    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);
}

Referenced by IoRequestDeviceEject().

IopSendRemoveChildDevices()

static VOID IopSendRemoveChildDevices ( PDEVICE_NODE  ParentDeviceNode )

static

Definition at line 1759 of file devaction.c.

{
    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);
}

Referenced by IopPrepareDeviceForRemoval(), and IoRequestDeviceEject().

IopSendRemoveDevice()

static VOID NTAPI IopSendRemoveDevice ( IN PDEVICE_OBJECT  DeviceObject )

static

Definition at line 1712 of file devaction.c.

{
    PDEVICE_NODE DeviceNode = IopGetDeviceNode(DeviceObject);
 
    ASSERT(DeviceNode->State == DeviceNodeAwaitingQueuedRemoval);
 
    /* Drivers should never fail a IRP_MN_REMOVE_DEVICE request */
    PiIrpSendRemoveCheckVpb(DeviceObject, IRP_MN_REMOVE_DEVICE);
 
    /* Start of HACK: update resources stored in registry, so IopDetectResourceConflict works */
    if (DeviceNode->ResourceList)
    {
        ASSERT(DeviceNode->ResourceListTranslated);
        DeviceNode->ResourceList->Count = 0;
        DeviceNode->ResourceListTranslated->Count = 0;
        IopUpdateResourceMapForPnPDevice(DeviceNode);
    }
    /* End of HACK */
 
    PiSetDevNodeState(DeviceNode, DeviceNodeRemoved);
    PiNotifyTargetDeviceChange(&GUID_TARGET_DEVICE_REMOVE_COMPLETE, DeviceObject, NULL);
    LONG_PTR refCount = ObDereferenceObject(DeviceObject);
    if (refCount != 0)
    {
        DPRINT1("Leaking device %wZ, refCount = %d\n", &DeviceNode->InstancePath, (INT32)refCount);
    }
}

Referenced by IopRemoveDevice(), IopSendRemoveChildDevices(), and IopSendRemoveDeviceRelations().

IopSendRemoveDeviceRelations()

static VOID IopSendRemoveDeviceRelations ( PDEVICE_RELATIONS  DeviceRelations )

static

Definition at line 1742 of file devaction.c.

{
    /* 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);
}

Referenced by IopPrepareDeviceForRemoval(), and IoRequestDeviceEject().

IopSendSurpriseRemoval()

static VOID NTAPI IopSendSurpriseRemoval ( IN PDEVICE_OBJECT  DeviceObject )

static

Definition at line 1783 of file devaction.c.

{
    ASSERT(IopGetDeviceNode(DeviceObject)->State == DeviceNodeAwaitingQueuedRemoval);
    /* Drivers should never fail a IRP_MN_SURPRISE_REMOVAL request */
    PiIrpSendRemoveCheckVpb(DeviceObject, IRP_MN_SURPRISE_REMOVAL);
}

Referenced by IopRemoveDevice().

IopSetDeviceInstanceData()

NTSTATUS IopSetDeviceInstanceData	(	HANDLE	InstanceKey,
		PDEVICE_NODE	DeviceNode
	)

Definition at line 606 of file pnpmgr.c.

{
    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;
}

Referenced by PiInitializeDevNode().

IopSetServiceEnumData()

static NTSTATUS IopSetServiceEnumData ( _In_ PDEVICE_NODE  DeviceNode, _In_ HANDLE  InstanceHandle  )

static

Definition at line 1343 of file devaction.c.

{
    UNICODE_STRING ServicesKeyPath = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\");
    UNICODE_STRING ServiceKeyName;
    UNICODE_STRING EnumKeyName;
    UNICODE_STRING ValueName;
    UNICODE_STRING ServiceName;
    PKEY_VALUE_FULL_INFORMATION KeyValueInformation, kvInfo2;
    HANDLE ServiceKey = NULL, ServiceEnumKey = NULL;
    ULONG Disposition;
    ULONG Count = 0, NextInstance = 0;
    WCHAR ValueBuffer[6];
    NTSTATUS Status = STATUS_SUCCESS;
 
    // obtain the device node's ServiceName
    Status = IopGetRegistryValue(InstanceHandle, L"Service", &kvInfo2);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    if (kvInfo2->Type != REG_SZ || kvInfo2->DataLength <= sizeof(WCHAR))
    {
        ExFreePool(kvInfo2);
        return STATUS_UNSUCCESSFUL;
    }
 
    ServiceName.MaximumLength = kvInfo2->DataLength;
    ServiceName.Length = kvInfo2->DataLength - sizeof(UNICODE_NULL);
    ServiceName.Buffer = (PVOID)((ULONG_PTR)kvInfo2 + kvInfo2->DataOffset);
 
    DPRINT("IopSetServiceEnumData(%p)\n", DeviceNode);
    DPRINT("Instance: %wZ\n", &DeviceNode->InstancePath);
    DPRINT("Service: %wZ\n", &ServiceName);
 
    ServiceKeyName.MaximumLength = ServicesKeyPath.Length + 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, &ServiceName);
 
    DPRINT("ServiceKeyName: %wZ\n", &ServiceKeyName);
 
    Status = IopOpenRegistryKeyEx(&ServiceKey, NULL, &ServiceKeyName, KEY_CREATE_SUB_KEY);
    if (!NT_SUCCESS(Status))
    {
        goto done;
    }
 
    Status = RtlDuplicateUnicodeString(RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING,
                                       &ServiceName,
                                       &DeviceNode->ServiceName);
    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);
    ExFreePool(kvInfo2);
 
    return Status;
}

Referenced by PiInitializeDevNode().

IopUpdateResourceMapForPnPDevice()

NTSTATUS IopUpdateResourceMapForPnPDevice

(

IN PDEVICE_NODE

DeviceNode

)

Definition at line 961 of file pnpres.c.

{
    return IopUpdateResourceMap(DeviceNode, L"PnP Manager", L"PnpManager");
}

Referenced by IopAssignDeviceResources(), and IopSendRemoveDevice().

IopValidateID()

static BOOLEAN IopValidateID ( _In_ PWCHAR  Id, _In_ BUS_QUERY_ID_TYPE  QueryType  )

static

Definition at line 122 of file devaction.c.

{
    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;
}

Referenced by IopCreateDeviceInstancePath(), IopQueryCompatibleIds(), and IopQueryHardwareIds().

IoRequestDeviceEject()

VOID NTAPI IoRequestDeviceEject

(

IN PDEVICE_OBJECT

PhysicalDeviceObject

)

Definition at line 2203 of file devaction.c.

{
    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);
}

PiAttachFilterDrivers()

static NTSTATUS PiAttachFilterDrivers ( PLIST_ENTRY  DriversListHead, PDEVICE_NODE  DeviceNode, HANDLE  EnumSubKey, HANDLE  ClassKey, BOOLEAN  Lower, BOOLEAN  LoadDrivers  )

static

Calls PiAttachFilterDriversCallback for filter drivers (if any)

Definition at line 532 of file devaction.c.

{
    RTL_QUERY_REGISTRY_TABLE QueryTable[2] = { { NULL, 0, NULL, NULL, 0, NULL, 0 }, };
    ATTACH_FILTER_DRIVERS_CONTEXT routineContext;
    NTSTATUS Status;
 
    PAGED_CODE();
 
    routineContext.DriversListHead = DriversListHead;
    routineContext.DeviceNode = DeviceNode;
 
    // First add device filters
    routineContext.DriverType = Lower ? LowerFilter : UpperFilter;
    QueryTable[0] = (RTL_QUERY_REGISTRY_TABLE){
        .QueryRoutine = PiAttachFilterDriversCallback,
        .Name = Lower ? L"LowerFilters" : L"UpperFilters",
        .DefaultType = REG_NONE,
        .EntryContext = (PVOID)(ULONG_PTR)LoadDrivers
    };
 
    Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
                                    (PWSTR)EnumSubKey,
                                    QueryTable,
                                    &routineContext,
                                    NULL);
    if (ClassKey == NULL)
    {
        return Status;
    }
 
    // Then add device class filters
    routineContext.DriverType = Lower ? LowerClassFilter : UpperClassFilter;
    QueryTable[0] = (RTL_QUERY_REGISTRY_TABLE){
        .QueryRoutine = PiAttachFilterDriversCallback,
        .Name = Lower ? L"LowerFilters" : L"UpperFilters",
        .DefaultType = REG_NONE,
        .EntryContext = (PVOID)(ULONG_PTR)LoadDrivers
    };
 
    Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
                                    (PWSTR)ClassKey,
                                    QueryTable,
                                    &routineContext,
                                    NULL);
    return Status;
}

Referenced by PiCallDriverAddDevice().

PiAttachFilterDriversCallback()

static NTSTATUS NTAPI PiAttachFilterDriversCallback ( PWSTR  ValueName, ULONG  ValueType, PVOID  ValueData, ULONG  ValueLength, PVOID  Ctx, PVOID  EntryContext  )

static

Loads and/or returns the driver associated with the registry entry if the driver is enabled. In case of an error, sets up a corresponding Problem to the DeviceNode.

Definition at line 363 of file devaction.c.

{
    PATTACH_FILTER_DRIVERS_CONTEXT context = Ctx;
    PDRIVER_OBJECT DriverObject;
    NTSTATUS Status;
    BOOLEAN loadDrivers = (BOOLEAN)(ULONG_PTR)EntryContext;
 
    PAGED_CODE();
 
    // No filter value present
    if (ValueType != REG_SZ)
        return STATUS_SUCCESS;
 
    if (ValueLength <= sizeof(WCHAR))
        return STATUS_OBJECT_NAME_NOT_FOUND;
 
    // open the service registry key
    UNICODE_STRING serviceName = { .Length = 0 }, servicesKeyName;
    RtlInitUnicodeString(&serviceName, ValueData);
    RtlInitUnicodeString(&servicesKeyName, ServicesKeyName);
 
    HANDLE ccsServicesHandle, serviceHandle = NULL;
 
    Status = IopOpenRegistryKeyEx(&ccsServicesHandle, NULL, &servicesKeyName, KEY_READ);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Failed to open a registry key for \"%wZ\" (status %x)\n", &serviceName, Status);
        return Status;
    }
 
    Status = IopOpenRegistryKeyEx(&serviceHandle, ccsServicesHandle, &serviceName, KEY_READ);
    ZwClose(ccsServicesHandle);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Failed to open a registry key for \"%wZ\" (status %x)\n", &serviceName, Status);
        return Status;
    }
 
    PADD_DEV_DRIVERS_LIST driverEntry = ExAllocatePoolWithTag(PagedPool,
                                                              sizeof(*driverEntry),
                                                              TAG_PNP_DEVACTION);
 
    if (!driverEntry)
    {
        DPRINT1("Failed to allocate driverEntry for \"%wZ\"\n", &serviceName);
        ZwClose(serviceHandle);
        return STATUS_INSUFFICIENT_RESOURCES;
    }
 
    // check if the driver is disabled
    PKEY_VALUE_FULL_INFORMATION kvInfo;
    SERVICE_LOAD_TYPE startType = DisableLoad;
 
    Status = IopGetRegistryValue(serviceHandle, L"Start", &kvInfo);
    if (NT_SUCCESS(Status))
    {
        if (kvInfo->Type == REG_DWORD)
        {
            RtlMoveMemory(&startType,
                          (PVOID)((ULONG_PTR)kvInfo + kvInfo->DataOffset),
                          sizeof(startType));
        }
 
        ExFreePool(kvInfo);
    }
 
    // TODO: take into account other start types (like SERVICE_DEMAND_START)
    if (startType >= DisableLoad)
    {
        if (!(context->DeviceNode->Flags & DNF_HAS_PROBLEM))
        {
            PiSetDevNodeProblem(context->DeviceNode, CM_PROB_DISABLED_SERVICE);
        }
 
        DPRINT("Service \"%wZ\" is disabled (start type %u)\n", &serviceName, startType);
        Status = STATUS_UNSUCCESSFUL;
        goto Cleanup;
    }
 
    // check if the driver is already loaded
    UNICODE_STRING driverName;
    Status = IopGetDriverNames(serviceHandle, &driverName, NULL);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Unable to obtain the driver name for \"%wZ\"\n", &serviceName);
        goto Cleanup;
    }
 
    // try to open it
    Status = ObReferenceObjectByName(&driverName,
                                     OBJ_OPENIF | OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
                                     NULL, /* PassedAccessState */
                                     0, /* DesiredAccess */
                                     IoDriverObjectType,
                                     KernelMode,
                                     NULL, /* ParseContext */
                                     (PVOID*)&DriverObject);
    RtlFreeUnicodeString(&driverName);
 
    // the driver was not probably loaded, try to load
    if (!NT_SUCCESS(Status))
    {
        if (loadDrivers)
        {
            Status = IopLoadDriver(serviceHandle, &DriverObject);
        }
        else
        {
            DPRINT("Service \"%wZ\" will not be loaded now\n", &serviceName);
            // return failure, the driver will be loaded later (in a subsequent call)
            Status = STATUS_UNSUCCESSFUL;
            goto Cleanup;
        }
    }
 
    if (NT_SUCCESS(Status))
    {
        driverEntry->DriverObject = DriverObject;
        driverEntry->DriverType = context->DriverType;
        InsertTailList(context->DriversListHead, &driverEntry->ListEntry);
        ZwClose(serviceHandle);
        return STATUS_SUCCESS;
    }
    else
    {
        if (!(context->DeviceNode->Flags & DNF_HAS_PROBLEM))
        {
            switch (Status)
            {
                case STATUS_INSUFFICIENT_RESOURCES:
                    PiSetDevNodeProblem(context->DeviceNode, CM_PROB_OUT_OF_MEMORY);
                    break;
                case STATUS_FAILED_DRIVER_ENTRY:
                    PiSetDevNodeProblem(context->DeviceNode, CM_PROB_FAILED_DRIVER_ENTRY);
                    break;
                case STATUS_ILL_FORMED_SERVICE_ENTRY:
                    PiSetDevNodeProblem(context->DeviceNode, CM_PROB_DRIVER_SERVICE_KEY_INVALID);
                    break;
                default:
                    PiSetDevNodeProblem(context->DeviceNode, CM_PROB_DRIVER_FAILED_LOAD);
                    break;
            }
        }
 
        DPRINT1("Failed to load driver \"%wZ\" for %wZ (status %x)\n",
            &serviceName, &context->DeviceNode->InstancePath, Status);
    }
 
Cleanup:
    ExFreePoolWithTag(driverEntry, TAG_PNP_DEVACTION);
    if (serviceHandle)
    {
        ZwClose(serviceHandle);
    }
    return Status;
}

Referenced by PiAttachFilterDrivers(), and PiCallDriverAddDevice().

PiCallDriverAddDevice()

static NTSTATUS PiCallDriverAddDevice ( _In_ PDEVICE_NODE  DeviceNode, _In_ BOOLEAN  LoadDrivers  )

static

Loads all drivers for a device node (actual service and filters) and calls their AddDevice routine.

Parameters

[in]	DeviceNode	The device node
[in]	LoadDrivers	Whether to load drivers if they are not loaded yet (used when storage subsystem is not yet initialized)

Definition at line 595 of file devaction.c.

{
    NTSTATUS Status;
    HANDLE EnumRootKey, SubKey;
    HANDLE ClassKey = NULL;
    UNICODE_STRING EnumRoot = RTL_CONSTANT_STRING(ENUM_ROOT);
    static UNICODE_STRING ccsControlClass =
    RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Class");
    PKEY_VALUE_FULL_INFORMATION kvInfo = NULL;
 
    PAGED_CODE();
 
    // open the enumeration root key
    Status = IopOpenRegistryKeyEx(&EnumRootKey, NULL, &EnumRoot, KEY_READ);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("IopOpenRegistryKeyEx() failed for \"%wZ\" (status %x)\n", &EnumRoot, Status);
        return Status;
    }
 
    // open an instance subkey
    Status = IopOpenRegistryKeyEx(&SubKey, EnumRootKey, &DeviceNode->InstancePath, KEY_READ);
    ZwClose(EnumRootKey);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("Failed to open a devnode instance key for \"%wZ\" (status %x)\n",
                &DeviceNode->InstancePath, Status);
        return Status;
    }
 
    // try to get the class GUID of an instance and its registry key
    Status = IopGetRegistryValue(SubKey, REGSTR_VAL_CLASSGUID, &kvInfo);
    if (NT_SUCCESS(Status))
    {
        if (kvInfo->Type == REG_SZ && kvInfo->DataLength > sizeof(WCHAR))
        {
            UNICODE_STRING classGUID = {
                .MaximumLength = kvInfo->DataLength,
                .Length = kvInfo->DataLength - sizeof(UNICODE_NULL),
                .Buffer = (PVOID)((ULONG_PTR)kvInfo + kvInfo->DataOffset)
            };
            HANDLE ccsControlHandle;
 
            Status = IopOpenRegistryKeyEx(&ccsControlHandle, NULL, &ccsControlClass, KEY_READ);
            if (!NT_SUCCESS(Status))
            {
                DPRINT1("IopOpenRegistryKeyEx() failed for \"%wZ\" (status %x)\n",
                        &ccsControlClass, Status);
            }
            else
            {
                // open the CCS\Control\Class<ClassGUID> key
                Status = IopOpenRegistryKeyEx(&ClassKey, ccsControlHandle, &classGUID, KEY_READ);
                ZwClose(ccsControlHandle);
                if (!NT_SUCCESS(Status))
                {
                    DPRINT1("Failed to open class key \"%wZ\" (status %x)\n", &classGUID, Status);
                }
            }
 
            if (ClassKey)
            {
                // Check the Properties key of a class too
                // Windows fills some device properties from this key (which is protected)
                // TODO: add the device properties from this key
 
                UNICODE_STRING properties = RTL_CONSTANT_STRING(REGSTR_KEY_DEVICE_PROPERTIES);
                HANDLE propertiesHandle;
 
                Status = IopOpenRegistryKeyEx(&propertiesHandle, ClassKey, &properties, KEY_READ);
                if (!NT_SUCCESS(Status))
                {
                    DPRINT("Properties key failed to open for \"%wZ\" (status %x)\n",
                           &classGUID, Status);
                }
                else
                {
                    ZwClose(propertiesHandle);
                }
            }
        }
 
        ExFreePool(kvInfo);
    }
 
    // the driver loading order:
    // 1. LowerFilters
    // 2. LowerClassFilters
    // 3. Device driver (only one service!)
    // 4. UpperFilters
    // 5. UpperClassFilters
 
    LIST_ENTRY drvListHead;
    InitializeListHead(&drvListHead);
 
    // lower (class) filters
    Status = PiAttachFilterDrivers(&drvListHead, DeviceNode, SubKey, ClassKey, TRUE, LoadDrivers);
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }
 
    ATTACH_FILTER_DRIVERS_CONTEXT routineContext = {
        .DriversListHead = &drvListHead,
        .DriverType = DeviceDriver,
        .DeviceNode = DeviceNode
    };
 
    RTL_QUERY_REGISTRY_TABLE queryTable[2] = {{
        .QueryRoutine = PiAttachFilterDriversCallback,
        .Name = L"Service",
        .Flags = RTL_QUERY_REGISTRY_REQUIRED,
        .DefaultType = REG_SZ, // REG_MULTI_SZ is not allowed here
        .DefaultData = L"",
        .EntryContext = (PVOID)(ULONG_PTR)LoadDrivers
    },};
 
    // device driver
    Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
                                    (PWSTR)SubKey,
                                    queryTable,
                                    &routineContext,
                                    NULL);
    if (NT_SUCCESS(Status))
    {
        // do nothing
    }
    // if a driver is not found, but a device allows raw access -> proceed
    else if (Status == STATUS_OBJECT_NAME_NOT_FOUND &&
             (DeviceNode->CapabilityFlags & 0x00000040)) // CM_DEVCAP_RAWDEVICEOK
    {
        // add a dummy entry to the drivers list (need for later processing)
        PADD_DEV_DRIVERS_LIST driverEntry = ExAllocatePoolZero(PagedPool,
                                                               sizeof(*driverEntry),
                                                               TAG_PNP_DEVACTION);
        driverEntry->DriverType = DeviceDriver;
        InsertTailList(&drvListHead, &driverEntry->ListEntry);
        DPRINT("No service for \"%wZ\" (RawDeviceOK)\n", &DeviceNode->InstancePath);
    }
    else
    {
        if (Status == STATUS_OBJECT_TYPE_MISMATCH && !(DeviceNode->Flags & DNF_HAS_PROBLEM))
        {
            PiSetDevNodeProblem(DeviceNode, CM_PROB_REGISTRY);
        }
        DPRINT("No service for \"%wZ\" (loadDrv: %u)\n", &DeviceNode->InstancePath, LoadDrivers);
        goto Cleanup;
    }
 
    // upper (class) filters
    Status = PiAttachFilterDrivers(&drvListHead, DeviceNode, SubKey, ClassKey, FALSE, LoadDrivers);
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }
 
    // finally loop through the stack and call AddDevice for every driver
    for (PLIST_ENTRY listEntry = drvListHead.Flink;
         listEntry != &drvListHead;
         listEntry = listEntry->Flink)
    {
        PADD_DEV_DRIVERS_LIST driverEntry;
        driverEntry = CONTAINING_RECORD(listEntry, ADD_DEV_DRIVERS_LIST, ListEntry);
        PDRIVER_OBJECT driverObject = driverEntry->DriverObject;
 
        // FIXME: ReactOS is not quite ready for this assert
        // (legacy drivers should not have AddDevice routine)
        // ASSERT(!(DriverObject->Flags & DRVO_LEGACY_DRIVER));
 
        if (driverObject && driverObject->DriverExtension->AddDevice)
        {
            Status = driverObject->DriverExtension->AddDevice(driverEntry->DriverObject,
                                                              DeviceNode->PhysicalDeviceObject);
        }
        else if (driverObject == NULL)
        {
            // valid only for DeviceDriver
            ASSERT(driverEntry->DriverType == DeviceDriver);
            ASSERT(DeviceNode->CapabilityFlags & 0x00000040); // CM_DEVCAP_RAWDEVICEOK
            Status = STATUS_SUCCESS;
        }
        else
        {
            // HACK: the driver doesn't have a AddDevice routine. We shouldn't be here,
            // but ReactOS' PnP stack is not that correct yet
            DeviceNode->Flags |= DNF_LEGACY_DRIVER;
            Status = STATUS_UNSUCCESSFUL;
        }
 
        // for filter drivers we don't care about the AddDevice result
        if (driverEntry->DriverType == DeviceDriver)
        {
            if (NT_SUCCESS(Status))
            {
                PDEVICE_OBJECT fdo = IoGetAttachedDeviceReference(DeviceNode->PhysicalDeviceObject);
 
                // HACK: Check if we have a ACPI device (needed for power management)
                if (fdo->DeviceType == FILE_DEVICE_ACPI)
                {
                    static BOOLEAN SystemPowerDeviceNodeCreated = FALSE;
 
                    // There can be only one system power device
                    if (!SystemPowerDeviceNodeCreated)
                    {
                        PopSystemPowerDeviceNode = DeviceNode;
                        ObReferenceObject(PopSystemPowerDeviceNode->PhysicalDeviceObject);
                        SystemPowerDeviceNodeCreated = TRUE;
                    }
                }
 
                ObDereferenceObject(fdo);
                PiSetDevNodeState(DeviceNode, DeviceNodeDriversAdded);
            }
            else
            {
                // lower filters (if already started) will be removed upon this request
                PiSetDevNodeProblem(DeviceNode, CM_PROB_FAILED_ADD);
                PiSetDevNodeState(DeviceNode, DeviceNodeAwaitingQueuedRemoval);
                break;
            }
        }
 
#if DBG
        PDEVICE_OBJECT attachedDO = IoGetAttachedDevice(DeviceNode->PhysicalDeviceObject);
        if (attachedDO->Flags & DO_DEVICE_INITIALIZING)
        {
            DPRINT1("DO_DEVICE_INITIALIZING is not cleared on a device 0x%p!\n", attachedDO);
        }
#endif
    }
 
Cleanup:
    while (!IsListEmpty(&drvListHead))
    {
        PLIST_ENTRY listEntry = RemoveHeadList(&drvListHead);
        PADD_DEV_DRIVERS_LIST driverEntry;
        driverEntry = CONTAINING_RECORD(listEntry, ADD_DEV_DRIVERS_LIST, ListEntry);
 
        // drivers which don't have any devices (in case of failure) will be cleaned up
        if (driverEntry->DriverObject)
        {
            ObDereferenceObject(driverEntry->DriverObject);
        }
        ExFreePoolWithTag(driverEntry, TAG_PNP_DEVACTION);
    }
 
    ZwClose(SubKey);
    if (ClassKey != NULL)
    {
        ZwClose(ClassKey);
    }
 
    return Status;
}

Referenced by PiDevNodeStateMachine(), and PipDeviceActionWorker().

PiDevNodeStateMachine()

static VOID PiDevNodeStateMachine ( _In_ PDEVICE_NODE  RootNode )

static

Definition at line 2312 of file devaction.c.

{
    NTSTATUS status;
    BOOLEAN doProcessAgain;
    PDEVICE_NODE currentNode = RootNode;
    PDEVICE_OBJECT referencedObject;
 
    do
    {
        doProcessAgain = FALSE;
 
        // The device can be removed during processing, but we still need its Parent and Sibling
        // links to continue the tree traversal. So keep the link till the and of a cycle
        referencedObject = currentNode->PhysicalDeviceObject;
        ObReferenceObject(referencedObject);
 
        // Devices with problems are skipped (unless they are not being removed)
        if (currentNode->Flags & DNF_HAS_PROBLEM &&
            currentNode->State != DeviceNodeAwaitingQueuedRemoval)
        {
            goto skipEnum;
        }
 
        switch (currentNode->State)
        {
            case DeviceNodeUnspecified: // this state is not used
                break;
            case DeviceNodeUninitialized:
                DPRINT("DeviceNodeUninitialized %wZ\n", &currentNode->InstancePath);
                status = PiInitializeDevNode(currentNode);
                doProcessAgain = NT_SUCCESS(status);
                break;
            case DeviceNodeInitialized:
                DPRINT("DeviceNodeInitialized %wZ\n", &currentNode->InstancePath);
                status = PiCallDriverAddDevice(currentNode, PnPBootDriversInitialized);
                doProcessAgain = NT_SUCCESS(status);
                break;
            case DeviceNodeDriversAdded:
                DPRINT("DeviceNodeDriversAdded %wZ\n", &currentNode->InstancePath);
                status = IopAssignDeviceResources(currentNode);
                doProcessAgain = NT_SUCCESS(status);
                break;
            case DeviceNodeResourcesAssigned:
                DPRINT("DeviceNodeResourcesAssigned %wZ\n", &currentNode->InstancePath);
                // send IRP_MN_START_DEVICE
                PiIrpStartDevice(currentNode);
 
                // skip DeviceNodeStartPending, it is probably used for an async IRP_MN_START_DEVICE
                PiSetDevNodeState(currentNode, DeviceNodeStartCompletion);
                doProcessAgain = TRUE;
                break;
            case DeviceNodeStartPending: // skipped on XP/2003
                break;
            case DeviceNodeStartCompletion:
                DPRINT("DeviceNodeStartCompletion %wZ\n", &currentNode->InstancePath);
                status = currentNode->CompletionStatus;
                doProcessAgain = TRUE;
                if (!NT_SUCCESS(status))
                {
                    UINT32 problem = (status == STATUS_PNP_REBOOT_REQUIRED)
                                     ? CM_PROB_NEED_RESTART
                                     : CM_PROB_FAILED_START;
 
                    PiSetDevNodeProblem(currentNode, problem);
                    PiSetDevNodeState(currentNode, DeviceNodeAwaitingQueuedRemoval);
                }
                else
                {
                    // TODO: IopDoDeferredSetInterfaceState and IopAllocateLegacyBootResources
                    // are called here too
 
                    PiSetDevNodeState(currentNode, DeviceNodeStartPostWork);
                }
                break;
            case DeviceNodeStartPostWork:
                DPRINT("DeviceNodeStartPostWork %wZ\n", &currentNode->InstancePath);
                // TODO: inspect the status
                status = PiStartDeviceFinal(currentNode);
                doProcessAgain = TRUE;
                break;
            case DeviceNodeStarted:
                if (currentNode->Flags & DNF_REENUMERATE)
                {
                    DPRINT("DeviceNodeStarted REENUMERATE %wZ\n", &currentNode->InstancePath);
                    currentNode->Flags &= ~DNF_REENUMERATE;
                    status = PiIrpQueryDeviceRelations(currentNode, BusRelations);
 
                    // again, skip DeviceNodeEnumeratePending as with the starting sequence
                    PiSetDevNodeState(currentNode, DeviceNodeEnumerateCompletion);
                    doProcessAgain = TRUE;
                }
                else if (currentNode->Flags & DNF_RESOURCE_REQUIREMENTS_CHANGED)
                {
                    if (currentNode->Flags & DNF_NON_STOPPED_REBALANCE)
                    {
                        PiFakeResourceRebalance(currentNode);
                        currentNode->Flags &= ~DNF_NON_STOPPED_REBALANCE;
                    }
                    else
                    {
                        PiIrpQueryStopDevice(currentNode);
                        PiSetDevNodeState(currentNode, DeviceNodeQueryStopped);
                    }
                    
                    doProcessAgain = TRUE;
                }
                break;
            case DeviceNodeQueryStopped:
                // we're here after sending IRP_MN_QUERY_STOP_DEVICE
                status = currentNode->CompletionStatus;
                if (NT_SUCCESS(status))
                {
                    PiIrpStopDevice(currentNode);
                    PiSetDevNodeState(currentNode, DeviceNodeStopped);
                }
                else
                {
                    PiIrpCancelStopDevice(currentNode);
                    PiSetDevNodeState(currentNode, DeviceNodeStarted);
                }
                doProcessAgain = TRUE;
                break;
            case DeviceNodeStopped:
                // TODO: do resource rebalance (not implemented)
                PiFakeResourceRebalance(currentNode);
 
                PiSetDevNodeState(currentNode, DeviceNodeDriversAdded);
                doProcessAgain = TRUE;
                break;
            case DeviceNodeRestartCompletion:
                break;
            case DeviceNodeEnumeratePending: // skipped on XP/2003
                break;
            case DeviceNodeEnumerateCompletion:
                DPRINT("DeviceNodeEnumerateCompletion %wZ\n", &currentNode->InstancePath);
                status = PiEnumerateDevice(currentNode);
                doProcessAgain = TRUE;
                break;
            case DeviceNodeAwaitingQueuedDeletion:
                break;
            case DeviceNodeAwaitingQueuedRemoval:
                DPRINT("DeviceNodeAwaitingQueuedRemoval %wZ\n", &currentNode->InstancePath);
                status = IopRemoveDevice(currentNode);
                break;
            case DeviceNodeQueryRemoved:
                break;
            case DeviceNodeRemovePendingCloses:
                break;
            case DeviceNodeRemoved:
                break;
            case DeviceNodeDeletePendingCloses:
                break;
            case DeviceNodeDeleted:
                break;
            default:
                break;
        }
 
skipEnum:
        if (!doProcessAgain)
        {
            KIRQL OldIrql;
            KeAcquireSpinLock(&IopDeviceTreeLock, &OldIrql);
            /* If we have a child, simply go down the tree */
            if (currentNode->State != DeviceNodeRemoved && currentNode->Child != NULL)
            {
                ASSERT(currentNode->Child->Parent == currentNode);
                currentNode = currentNode->Child;
            }
            else
            {
                while (currentNode != RootNode)
                {
                    /* All children processed -- go sideways */
                    if (currentNode->Sibling != NULL)
                    {
                        ASSERT(currentNode->Sibling->Parent == currentNode->Parent);
                        currentNode = currentNode->Sibling;
                        break;
                    }
                    else
                    {
                        /* We're the last sibling -- go back up */
                        ASSERT(currentNode->Parent->LastChild == currentNode);
                        currentNode = currentNode->Parent;
                    }
                    /* We already visited the parent and all its children, so keep looking */
                }
            }
            KeReleaseSpinLock(&IopDeviceTreeLock, OldIrql);
        }
        ObDereferenceObject(referencedObject);
    } while (doProcessAgain || currentNode != RootNode);
}

Referenced by PipDeviceActionWorker().

PiEnumerateDevice()

static NTSTATUS PiEnumerateDevice ( _In_ PDEVICE_NODE  DeviceNode )

static

Definition at line 2096 of file devaction.c.

{
    PDEVICE_OBJECT ChildDeviceObject;
    PDEVICE_NODE ChildDeviceNode;
    ULONG i;
 
    // bus relations are already obtained for this device node
 
    if (!NT_SUCCESS(DeviceNode->CompletionStatus))
    {
        DPRINT("QDR request failed for %wZ, status %x\n",
            &DeviceNode->InstancePath, DeviceNode->CompletionStatus);
        // treat as if there are no child objects
    }
 
    PDEVICE_RELATIONS DeviceRelations = DeviceNode->OverUsed1.PendingDeviceRelations;
    DeviceNode->OverUsed1.PendingDeviceRelations = NULL;
 
    // it's acceptable not to have PDOs
    if (!DeviceRelations)
    {
        PiSetDevNodeState(DeviceNode, DeviceNodeStarted);
        DPRINT("No PDOs\n");
        return STATUS_SUCCESS;
    }
 
    // mark children nodes as non-present (those not returned in DR request will be removed)
    for (PDEVICE_NODE child = DeviceNode->Child; child != NULL; child = child->Sibling)
    {
        child->Flags &= ~DNF_ENUMERATED;
    }
 
    DPRINT("PiEnumerateDevice: enumerating %u children\n", DeviceRelations->Count);
 
    // create device nodes for all new children and set DNF_ENUMERATED back for old ones
    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 */
            ChildDeviceNode = PipAllocateDeviceNode(ChildDeviceObject);
            if (ChildDeviceNode)
            {
                PiInsertDevNode(ChildDeviceNode, DeviceNode);
 
                /* 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("PipAllocateDeviceNode() failed. Skipping PDO %u\n", i);
                ObDereferenceObject(ChildDeviceObject);
            }
        }
        else
        {
            /* Mark it as enumerated */
            ChildDeviceNode->Flags |= DNF_ENUMERATED;
            ObDereferenceObject(ChildDeviceObject);
        }
    }
    ExFreePool(DeviceRelations);
 
    // time to remove non-reported devices
    for (PDEVICE_NODE child = DeviceNode->Child; child != NULL; child = child->Sibling)
    {
        if (!(child->Flags & (DNF_ENUMERATED|DNF_DEVICE_GONE)))
        {
            // this flag indicates that this is a surprise removal
            child->Flags |= DNF_DEVICE_GONE;
            PiSetDevNodeState(child, DeviceNodeAwaitingQueuedRemoval);
        }
    }
 
    PiSetDevNodeState(DeviceNode, DeviceNodeStarted);
    return STATUS_SUCCESS;
}

Referenced by PiDevNodeStateMachine().

PiFakeResourceRebalance()

static VOID PiFakeResourceRebalance ( _In_ PDEVICE_NODE  DeviceNode )

static

Definition at line 2288 of file devaction.c.

{
    ASSERT(DeviceNode->Flags & DNF_RESOURCE_REQUIREMENTS_CHANGED);
 
    PCM_RESOURCE_LIST bootConfig = NULL;
    PIO_RESOURCE_REQUIREMENTS_LIST resourceRequirements = NULL;
 
    PiIrpQueryResources(DeviceNode, &bootConfig);
    PiIrpQueryResourceRequirements(DeviceNode, &resourceRequirements);
 
    DeviceNode->BootResources = bootConfig;
    DeviceNode->ResourceRequirements = resourceRequirements;
 
    if (bootConfig)
    {
        DeviceNode->Flags |= DNF_HAS_BOOT_CONFIG;
    }
 
    DeviceNode->Flags &= ~DNF_RESOURCE_REQUIREMENTS_CHANGED;
}

Referenced by PiDevNodeStateMachine().

PiInitializeDevNode()

static NTSTATUS PiInitializeDevNode ( _In_ PDEVICE_NODE  DeviceNode )

static

Definition at line 1190 of file devaction.c.

{
    IO_STATUS_BLOCK IoStatusBlock;
    NTSTATUS Status;
    HANDLE InstanceKey = NULL;
    UNICODE_STRING InstancePathU;
    PDEVICE_OBJECT OldDeviceObject;
 
    DPRINT("PiProcessNewDevNode(%p)\n", DeviceNode);
    DPRINT("PDO 0x%p\n", DeviceNode->PhysicalDeviceObject);
 
    /*
     * 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);
        }
        return Status;
    }
 
    /* 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);
 
    DeviceNode->Flags |= DNF_IDS_QUERIED;
 
    // Set the device's DeviceDesc and LocationInformation fields
    PiSetDevNodeText(DeviceNode, InstanceKey);
 
    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);
    }
 
    // Try installing a critical device, so its Service key is populated
    // then call IopSetServiceEnumData to populate service's Enum key.
    // That allows us to start devices during an early boot
    IopInstallCriticalDevice(DeviceNode);
    IopSetServiceEnumData(DeviceNode, InstanceKey);
 
    ZwClose(InstanceKey);
 
    PiSetDevNodeState(DeviceNode, DeviceNodeInitialized);
 
    if (!IopDeviceNodeHasFlag(DeviceNode, DNF_LEGACY_DRIVER))
    {
        /* Report the device to the user-mode pnp manager */
        IopQueueTargetDeviceEvent(&GUID_DEVICE_ENUMERATED,
                                  &DeviceNode->InstancePath);
    }
 
    return STATUS_SUCCESS;
}

Referenced by PiDevNodeStateMachine().

PiIrpSendRemoveCheckVpb()

static NTSTATUS PiIrpSendRemoveCheckVpb ( _In_ PDEVICE_OBJECT  DeviceObject, _In_ UCHAR  MinorFunction  )

static

Sends one of the remove IRPs to the device stack.

If there is a mounted VPB attached to a one of the stack devices, the IRP should be send to a VPB's DeviceObject first (which belongs to a FS driver). FS driver will then forward it down to the volume device. While walking the device stack, the function sets (or unsets) VPB_REMOVE_PENDING flag thus blocking all further mounts on a soon-to-be-removed devices

Definition at line 1645 of file devaction.c.

{
    KIRQL oldIrql;
 
    ASSERT(MinorFunction == IRP_MN_QUERY_REMOVE_DEVICE ||
           MinorFunction == IRP_MN_CANCEL_REMOVE_DEVICE ||
           MinorFunction == IRP_MN_SURPRISE_REMOVAL ||
           MinorFunction == IRP_MN_REMOVE_DEVICE);
 
    PDEVICE_OBJECT vpbDevObj = DeviceObject, targetDevice = DeviceObject;
 
    // walk the device stack down, stop on a first mounted device
    do
    {
        if (vpbDevObj->Vpb)
        {
            // two locks are needed here
            KeWaitForSingleObject(&vpbDevObj->DeviceLock, Executive, KernelMode, FALSE, NULL);
            IoAcquireVpbSpinLock(&oldIrql);
 
            if (MinorFunction == IRP_MN_CANCEL_REMOVE_DEVICE)
            {
                vpbDevObj->Vpb->Flags &= ~VPB_REMOVE_PENDING;
            }
            else
            {
                vpbDevObj->Vpb->Flags |= VPB_REMOVE_PENDING;
            }
 
            BOOLEAN isMounted = (_Bool)(vpbDevObj->Vpb->Flags & VPB_MOUNTED);
 
            if (isMounted)
            {
                targetDevice = vpbDevObj->Vpb->DeviceObject;
            }
 
            IoReleaseVpbSpinLock(oldIrql);
            KeSetEvent(&vpbDevObj->DeviceLock, IO_NO_INCREMENT, FALSE);
 
            if (isMounted)
            {
                break;
            }
        }
 
        oldIrql = KeAcquireQueuedSpinLock(LockQueueIoDatabaseLock);
        vpbDevObj = vpbDevObj->AttachedDevice;
        KeReleaseQueuedSpinLock(LockQueueIoDatabaseLock, oldIrql);
    } while (vpbDevObj);
 
    ASSERT(targetDevice);
 
    PVOID info;
    IO_STACK_LOCATION stack = {.MajorFunction = IRP_MJ_PNP, .MinorFunction = MinorFunction};
 
    return IopSynchronousCall(targetDevice, &stack, &info);
}

Referenced by IopCancelRemoveDevice(), IopQueryRemoveDevice(), IopSendRemoveDevice(), and IopSendSurpriseRemoval().

PipDeviceActionWorker()

static VOID NTAPI PipDeviceActionWorker ( _In_opt_ PVOID  Context )

static

Definition at line 2537 of file devaction.c.

{
    PLIST_ENTRY ListEntry;
    PDEVICE_ACTION_REQUEST Request;
    KIRQL OldIrql;
    PDEVICE_NODE deviceNode;
    NTSTATUS status;
 
    KeAcquireSpinLock(&IopDeviceActionLock, &OldIrql);
    while (!IsListEmpty(&IopDeviceActionRequestList))
    {
        ListEntry = RemoveHeadList(&IopDeviceActionRequestList);
        KeReleaseSpinLock(&IopDeviceActionLock, OldIrql);
        Request = CONTAINING_RECORD(ListEntry, DEVICE_ACTION_REQUEST, RequestListEntry);
 
        ASSERT(Request->DeviceObject);
 
        deviceNode = IopGetDeviceNode(Request->DeviceObject);
        ASSERT(deviceNode);
 
        status = STATUS_SUCCESS;
 
        DPRINT("Processing PnP request %p: DeviceObject - %p, Action - %s\n",
               Request, Request->DeviceObject, ActionToStr(Request->Action));
 
        switch (Request->Action)
        {
            case PiActionAddBootDevices:
            {
                if (deviceNode->State == DeviceNodeInitialized &&
                    !(deviceNode->Flags & DNF_HAS_PROBLEM))
                {
                    status = PiCallDriverAddDevice(deviceNode, PnPBootDriversInitialized);
                }
                break;
            }
            case PiActionEnumRootDevices:
            case PiActionEnumDeviceTree:
                deviceNode->Flags |= DNF_REENUMERATE;
                PiDevNodeStateMachine(deviceNode);
                break;
 
            case PiActionResetDevice:
                // TODO: the operation is a no-op for everything except removed nodes
                // for removed nodes, it returns them back to DeviceNodeUninitialized
                status = STATUS_SUCCESS;
                break;
 
            case PiActionStartDevice:
                // This action is triggered from usermode, when a driver is installed
                // for a non-critical PDO
                if (deviceNode->State == DeviceNodeInitialized &&
                    !(deviceNode->Flags & DNF_HAS_PROBLEM))
                {
                    PiDevNodeStateMachine(deviceNode);
                }
                else
                {
                    DPRINT1("NOTE: attempt to start an already started/uninitialized device %wZ\n",
                            &deviceNode->InstancePath);
                    status = STATUS_UNSUCCESSFUL;
                }
                break;
 
            case PiActionQueryState:
                // This action is only valid for started devices. If the device is not yet
                // started, the PnP manager issues IRP_MN_QUERY_PNP_DEVICE_STATE by itself.
                if (deviceNode->State == DeviceNodeStarted)
                {
                    // Issue a IRP_MN_QUERY_PNP_DEVICE_STATE request: it will update node's flags
                    // and then do enumeration if something has changed
                    status = PiUpdateDeviceState(deviceNode);
                    if (NT_SUCCESS(status))
                    {
                        PiDevNodeStateMachine(deviceNode);
                    }
                }
                // TODO: Windows may return STATUS_DELETE_PENDING here
                status = STATUS_SUCCESS;                
                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);
}

Referenced by PiQueueDeviceAction().

PiPerformSyncDeviceAction()

NTSTATUS PiPerformSyncDeviceAction	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_In_ DEVICE_ACTION	Action
	)

Perfom a device operation synchronously via PiQueueDeviceAction.

Parameters

[in]	DeviceObject	The device object
[in]	Action	The action

Returns

Status of the operation

Definition at line 2714 of file devaction.c.

{
    KEVENT opFinished;
    NTSTATUS status;
 
    KeInitializeEvent(&opFinished, SynchronizationEvent, FALSE);
    PiQueueDeviceAction(DeviceObject, Action, &opFinished, &status);
    KeWaitForSingleObject(&opFinished, Executive, KernelMode, FALSE, NULL);
 
    return status;
}

Referenced by IopInitializeSystemDrivers(), IoSynchronousInvalidateDeviceRelations(), and PiControlSyncDeviceAction().

PiQueueDeviceAction()

VOID PiQueueDeviceAction	(	_In_ PDEVICE_OBJECT	DeviceObject,
		_In_ DEVICE_ACTION	Action,
		_In_opt_ PKEVENT	CompletionEvent,
		_Out_opt_ NTSTATUS *	CompletionStatus
	)

Queue a device operation to a worker thread.

Parameters

[in]	DeviceObject	The device object
[in]	Action	The action
[in]	CompletionEvent	The completion event object (optional)
[out]	CompletionStatus	Status returned be the action will be written here

Definition at line 2655 of file devaction.c.

{
    PDEVICE_ACTION_REQUEST Request;
    KIRQL OldIrql;
 
    Request = ExAllocatePoolWithTag(NonPagedPoolMustSucceed, sizeof(*Request), TAG_IO);
 
    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 || Action == PiActionAddBootDevices)
    {
        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);
}

Referenced by IoInitSystem(), IoInvalidateDeviceRelations(), IoInvalidateDeviceState(), IopInitializeBootDrivers(), IopInitializeBuiltinDriver(), IopInitializePlugPlayServices(), IopInitializeSystemDrivers(), IoReportDetectedDevice(), and PiPerformSyncDeviceAction().

PiSetDevNodeText()

VOID PiSetDevNodeText	(	_In_ PDEVICE_NODE	DeviceNode,
		_In_ HANDLE	InstanceKey
	)

Sets the DeviceNode's DeviceDesc and LocationInformation registry values.

Definition at line 1089 of file devaction.c.

{
    PAGED_CODE();
 
    LCID localeId;
 
    // Get the Locale ID
    NTSTATUS status = ZwQueryDefaultLocale(FALSE, &localeId);
    if (!NT_SUCCESS(status))
    {
        DPRINT1("ZwQueryDefaultLocale() failed with status %x\n", status);
        return;
    }
 
    // Step 1: Write the DeviceDesc value if does not exist
 
    UNICODE_STRING valDeviceDesc = RTL_CONSTANT_STRING(L"DeviceDesc");
    ULONG len;
 
    status = ZwQueryValueKey(InstanceKey, &valDeviceDesc, KeyValueBasicInformation, NULL, 0, &len);
    if (status == STATUS_OBJECT_NAME_NOT_FOUND)
    {
        PWSTR deviceDesc = NULL;
        status = PiIrpQueryDeviceText(DeviceNode, localeId, DeviceTextDescription, &deviceDesc);
 
        if (deviceDesc && deviceDesc[0] != UNICODE_NULL)
        {
            status = ZwSetValueKey(InstanceKey,
                                   &valDeviceDesc,
                                   0,
                                   REG_SZ,
                                   deviceDesc,
                                   ((ULONG)wcslen(deviceDesc) + 1) * sizeof(WCHAR));
 
            if (!NT_SUCCESS(status))
            {
                DPRINT1("ZwSetValueKey() failed (Status %x)\n", status);
            }
        }
        else
        {
            // This key is mandatory, so even if the Irp fails, we still write it
            UNICODE_STRING unknownDeviceDesc = RTL_CONSTANT_STRING(L"Unknown device");
            DPRINT("Driver didn't return DeviceDesc (status %x)\n", status);
 
            status = ZwSetValueKey(InstanceKey,
                                   &valDeviceDesc,
                                   0,
                                   REG_SZ,
                                   unknownDeviceDesc.Buffer,
                                   unknownDeviceDesc.MaximumLength);
            if (!NT_SUCCESS(status))
            {
                DPRINT1("ZwSetValueKey() failed (Status %x)\n", status);
            }
        }
 
        if (deviceDesc)
        {
            ExFreePoolWithTag(deviceDesc, 0);
        }
    }
 
    // Step 2: LocaltionInformation is overwritten unconditionally
 
    PWSTR deviceLocationInfo = NULL;
    status = PiIrpQueryDeviceText(DeviceNode,
                                  localeId,
                                  DeviceTextLocationInformation,
                                  &deviceLocationInfo);
 
    if (deviceLocationInfo && deviceLocationInfo[0] != UNICODE_NULL)
    {
        UNICODE_STRING valLocationInfo = RTL_CONSTANT_STRING(L"LocationInformation");
 
        status = ZwSetValueKey(InstanceKey,
                               &valLocationInfo,
                               0,
                               REG_SZ,
                               deviceLocationInfo,
                               ((ULONG)wcslen(deviceLocationInfo) + 1) * sizeof(WCHAR));
        if (!NT_SUCCESS(status))
        {
            DPRINT1("ZwSetValueKey() failed (Status %x)\n", status);
        }
    }
 
    if (deviceLocationInfo)
    {
        ExFreePoolWithTag(deviceLocationInfo, 0);
    }
    else
    {
        DPRINT("Driver didn't return LocationInformation (status %x)\n", status);
    }
}

Referenced by IoReportDetectedDevice(), and PiInitializeDevNode().

PiStartDeviceFinal()

static NTSTATUS PiStartDeviceFinal ( _In_ PDEVICE_NODE  DeviceNode )

static

Definition at line 1573 of file devaction.c.

{
    DEVICE_CAPABILITIES DeviceCapabilities;
    NTSTATUS Status;
 
    if (!(DeviceNode->Flags & DNF_IDS_QUERIED))
    {
        // query ids (for reported devices)
        UNICODE_STRING enumRoot = RTL_CONSTANT_STRING(ENUM_ROOT);
        HANDLE enumRootHandle, instanceHandle;
 
        // open the enumeration root key
        Status = IopOpenRegistryKeyEx(&enumRootHandle, NULL, &enumRoot, KEY_READ);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("IopOpenRegistryKeyEx() failed for \"%wZ\" (status %x)\n", &enumRoot, Status);
            return Status;
        }
 
        // open an instance subkey
        Status = IopOpenRegistryKeyEx(&instanceHandle, enumRootHandle, &DeviceNode->InstancePath, KEY_READ);
        ZwClose(enumRootHandle);
        if (!NT_SUCCESS(Status))
        {
            DPRINT1("Failed to open a devnode instance key for \"%wZ\" (status %x)\n",
                    &DeviceNode->InstancePath, Status);
            return Status;
        }
 
        IopQueryHardwareIds(DeviceNode, instanceHandle);
        IopQueryCompatibleIds(DeviceNode, instanceHandle);
 
        DeviceNode->Flags |= DNF_IDS_QUERIED;
        ZwClose(instanceHandle);
    }
 
    // we're about to start - needs enumeration
    DeviceNode->Flags |= DNF_REENUMERATE;
 
    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);
    }
 
    // Query the device state (IRP_MN_QUERY_PNP_DEVICE_STATE)
    PiUpdateDeviceState(DeviceNode);
 
    DPRINT("Sending GUID_DEVICE_ARRIVAL %wZ\n", &DeviceNode->InstancePath);
    IopQueueTargetDeviceEvent(&GUID_DEVICE_ARRIVAL, &DeviceNode->InstancePath);
 
    PiSetDevNodeState(DeviceNode, DeviceNodeStarted);
 
    return STATUS_SUCCESS;
}

Referenced by PiDevNodeStateMachine().

PiUpdateDeviceState()

static NTSTATUS PiUpdateDeviceState ( _In_ PDEVICE_NODE  DeviceNode )

static

Processes the IoInvalidateDeviceState request.

Sends IRP_MN_QUERY_PNP_DEVICE_STATE request and sets device node's flags according to the result. Tree reenumeration should be started upon a successful return of the function.

Todo:

Do not return STATUS_SUCCESS if nothing is changed.

Definition at line 1516 of file devaction.c.

{
    PNP_DEVICE_STATE PnPFlags;
    NTSTATUS Status;
 
    Status = PiIrpQueryPnPDeviceState(DeviceNode, &PnPFlags);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    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_DISABLED)
    {
        PiSetDevNodeProblem(DeviceNode,
                            PnPFlags & PNP_DEVICE_DISABLED 
                            ? CM_PROB_HARDWARE_DISABLED
                            : CM_PROB_DEVICE_NOT_THERE);
 
        PiSetDevNodeState(DeviceNode, DeviceNodeAwaitingQueuedRemoval);
    }
    else if (PnPFlags & PNP_DEVICE_RESOURCE_REQUIREMENTS_CHANGED)
    {
        // Query resource rebalance
 
        if (PnPFlags & PNP_DEVICE_FAILED)
            DeviceNode->Flags &= DNF_NON_STOPPED_REBALANCE;
        else
            DeviceNode->Flags |= DNF_NON_STOPPED_REBALANCE;
 
        // Clear DNF_NO_RESOURCE_REQUIRED just in case (will be set back if needed)
        DeviceNode->Flags &= ~DNF_NO_RESOURCE_REQUIRED;
 
        // This will be caught up later by enumeration
        DeviceNode->Flags |= DNF_RESOURCE_REQUIREMENTS_CHANGED;
    }
    else if (PnPFlags & PNP_DEVICE_FAILED)
    {
        PiSetDevNodeProblem(DeviceNode, CM_PROB_FAILED_POST_START);
        PiSetDevNodeState(DeviceNode, DeviceNodeAwaitingQueuedRemoval);
    }
 
    return STATUS_SUCCESS;
}

Referenced by PipDeviceActionWorker(), and PiStartDeviceFinal().

Variable Documentation

IopDeviceActionInProgress

BOOLEAN IopDeviceActionInProgress

Definition at line 48 of file devaction.c.

Referenced by PipDeviceActionWorker(), and PiQueueDeviceAction().

IopDeviceActionLock

KSPIN_LOCK IopDeviceActionLock

Definition at line 49 of file devaction.c.

Referenced by IopInitializePlugPlayServices(), PipDeviceActionWorker(), and PiQueueDeviceAction().

IopDeviceActionRequestList

LIST_ENTRY IopDeviceActionRequestList

Definition at line 46 of file devaction.c.

Referenced by IopInitializePlugPlayServices(), PipDeviceActionWorker(), and PiQueueDeviceAction().

IopDeviceActionWorkItem

WORK_QUEUE_ITEM IopDeviceActionWorkItem

Definition at line 47 of file devaction.c.

Referenced by PiQueueDeviceAction().

IopDriverLoadResource

ERESOURCE IopDriverLoadResource

extern

Definition at line 20 of file driver.c.

Referenced by IopLoadDriver().

IopRootDeviceNode

PDEVICE_NODE IopRootDeviceNode

extern

Definition at line 18 of file devnode.c.

PiEnumerationFinished

KEVENT PiEnumerationFinished

Definition at line 50 of file devaction.c.

Referenced by IopInitializePlugPlayServices(), IopReinitializeBootDrivers(), IopStartRamdisk(), PipDeviceActionWorker(), and PiQueueDeviceAction().

PnPBootDriversInitialized

BOOLEAN PnPBootDriversInitialized

extern

Definition at line 27 of file pnpinit.c.

Referenced by PiDevNodeStateMachine(), and PipDeviceActionWorker().

PnPBootDriversLoaded

BOOLEAN PnPBootDriversLoaded

extern

Definition at line 26 of file pnpinit.c.

Referenced by PiQueueDeviceAction().

PnpSystemInit

BOOLEAN PnpSystemInit

extern

Definition at line 17 of file iomgr.c.

Referenced by IoInitSystem().

ServicesKeyName

const WCHAR ServicesKeyName[] = L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\"

static

Definition at line 51 of file devaction.c.

Referenced by PiAttachFilterDriversCallback().