IoDeleteDevice源碼

WRK的IoDeleteDevice源碼 原本想解讀一下 IoDeleteDevice 但發現實際上會調用 IovDeleteDevice 但沒有找到IovDeleteDevice 相關的代碼 那就暫時擱置 回頭具體分析

VOID
IoDeleteDevice(
    IN PDEVICE_OBJECT DeviceObject
    )

/*++

Routine Description:

    This routine deletes the specified device object from the system so that
    it may no longer be referenced.  It is invoked when either the device
    driver is being unloaded from the system, or the driver's initialization
    routine failed to properly initialize the device or a fatal driver
    initialization error was encountered, or when the device is being removed
    from the system.

Arguments:

    DeviceObject - Pointer to the device object that is to be deleted.

Return Value:

    None.

--*/

{
    KIRQL irql;

    IOV_DELETE_DEVICE(DeviceObject);

    //
    // Check to see whether or not the device has registered a shutdown
    // handler if necessary, and if so, unregister it.
    //

    if (DeviceObject->Flags & DO_SHUTDOWN_REGISTERED) {
        IoUnregisterShutdownNotification( DeviceObject );
    }

    //
    // Release the pool that was allocated to contain the timer dispatch
    // routine and its associated context if there was one.
    //

    if (DeviceObject->Timer) {
        PIO_TIMER timer;

        timer = DeviceObject->Timer;
        IopRemoveTimerFromTimerList(timer);
        ExFreePool( timer );
    }

    //
    // If this device has a name, then mark the
    // object as temporary so that when it is dereferenced it will be
    // deleted.
    //

    if (DeviceObject->Flags & DO_DEVICE_HAS_NAME) {
        ObMakeTemporaryObject( DeviceObject );
    }

    //
    // PoRunDownDeviceObject will clean up any power management
    // structures attached to the device object.
    //

    PoRunDownDeviceObject(DeviceObject);

    //
    // Mark the device object as deleted.
    //

    irql = KeAcquireQueuedSpinLock( LockQueueIoDatabaseLock );

    DeviceObject->DeviceObjectExtension->ExtensionFlags |= DOE_DELETE_PENDING;

    if (!DeviceObject->ReferenceCount) {
        IopCompleteUnloadOrDelete( DeviceObject, FALSE, irql );
    } else {
        KeReleaseQueuedSpinLock( LockQueueIoDatabaseLock, irql );
    }
}