mirror of
https://github.com/reactos/reactos.git
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c424146e2c
svn path=/branches/cmake-bringup/; revision=48236
741 lines
19 KiB
C
741 lines
19 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel Streaming
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* FILE: drivers/ksfilter/ks/event.c
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* PURPOSE: KS Event functions
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* PROGRAMMER: Johannes Anderwald
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*/
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#include "priv.h"
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BOOLEAN
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KspSynchronizedEventRoutine(
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IN KSEVENTS_LOCKTYPE EventsFlags,
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IN PVOID EventsLock,
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IN PKSEVENT_SYNCHRONIZED_ROUTINE SynchronizedRoutine,
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IN PKSEVENT_CTX Ctx)
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{
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BOOLEAN Result = FALSE;
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KIRQL OldLevel;
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if (EventsFlags == KSEVENTS_NONE)
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{
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/* no synchronization required */
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Result = SynchronizedRoutine(Ctx);
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}
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else if (EventsFlags == KSEVENTS_SPINLOCK)
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{
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/* use spin lock */
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KeAcquireSpinLock((PKSPIN_LOCK)EventsLock, &OldLevel);
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Result = SynchronizedRoutine(Ctx);
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KeReleaseSpinLock((PKSPIN_LOCK)EventsLock, OldLevel);
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}
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else if (EventsFlags == KSEVENTS_MUTEX)
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{
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/* use a mutex */
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KeWaitForSingleObject(EventsLock, Executive, KernelMode, FALSE, NULL);
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Result = SynchronizedRoutine(Ctx);
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KeReleaseMutex((PRKMUTEX)EventsLock, FALSE);
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}
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else if (EventsFlags == KSEVENTS_FMUTEX)
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{
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/* use a fast mutex */
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ExAcquireFastMutex((PFAST_MUTEX)EventsLock);
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Result = SynchronizedRoutine(Ctx);
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ExReleaseFastMutex((PFAST_MUTEX)EventsLock);
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}
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else if (EventsFlags == KSEVENTS_FMUTEXUNSAFE)
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{
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/* acquire fast mutex unsafe */
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KeEnterCriticalRegion();
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ExAcquireFastMutexUnsafe((PFAST_MUTEX)EventsLock);
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Result = SynchronizedRoutine(Ctx);
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ExReleaseFastMutexUnsafe((PFAST_MUTEX)EventsLock);
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KeLeaveCriticalRegion();
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}
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else if (EventsFlags == KSEVENTS_INTERRUPT)
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{
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/* use interrupt for locking */
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Result = KeSynchronizeExecution((PKINTERRUPT)EventsLock, (PKSYNCHRONIZE_ROUTINE)SynchronizedRoutine, (PVOID)Ctx);
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}
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else if (EventsFlags == KSEVENTS_ERESOURCE)
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{
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/* use an eresource */
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KeEnterCriticalRegion();
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ExAcquireResourceExclusiveLite((PERESOURCE)EventsLock, TRUE);
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Result = SynchronizedRoutine(Ctx);
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ExReleaseResourceLite((PERESOURCE)EventsLock);
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KeLeaveCriticalRegion();
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}
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return Result;
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}
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BOOLEAN
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NTAPI
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SyncAddEvent(
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PKSEVENT_CTX Context)
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{
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InsertTailList(Context->List, &Context->EventEntry->ListEntry);
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return TRUE;
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}
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NTSTATUS
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KspEnableEvent(
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IN PIRP Irp,
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IN ULONG EventSetsCount,
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IN PKSEVENT_SET EventSet,
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IN OUT PLIST_ENTRY EventsList OPTIONAL,
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IN KSEVENTS_LOCKTYPE EventsFlags OPTIONAL,
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IN PVOID EventsLock OPTIONAL,
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IN PFNKSALLOCATOR Allocator OPTIONAL,
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IN ULONG EventItemSize OPTIONAL)
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{
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PIO_STACK_LOCATION IoStack;
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NTSTATUS Status;
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KSEVENT Event;
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PKSEVENT_ITEM EventItem, FoundEventItem;
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PKSEVENTDATA EventData;
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PKSEVENT_SET FoundEventSet;
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PKSEVENT_ENTRY EventEntry;
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ULONG Index, SubIndex, Size;
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PVOID Object;
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KSEVENT_CTX Ctx;
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LPGUID Guid;
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/* get current stack location */
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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if (IoStack->Parameters.DeviceIoControl.InputBufferLength < sizeof(KSEVENT))
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{
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/* invalid parameter */
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return STATUS_NOT_SUPPORTED;
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}
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if (Irp->RequestorMode == UserMode)
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{
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_SEH2_TRY
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{
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ProbeForRead(IoStack->Parameters.DeviceIoControl.Type3InputBuffer, sizeof(KSEVENT), sizeof(UCHAR));
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ProbeForRead(Irp->UserBuffer, IoStack->Parameters.DeviceIoControl.OutputBufferLength, sizeof(UCHAR));
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RtlMoveMemory(&Event, IoStack->Parameters.DeviceIoControl.Type3InputBuffer, sizeof(KSEVENT));
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Status = STATUS_SUCCESS;
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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/* Exception, get the error code */
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Status = _SEH2_GetExceptionCode();
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}
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_SEH2_END;
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/* check for success */
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if (!NT_SUCCESS(Status))
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{
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/* failed to probe parameters */
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return Status;
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}
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}
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else
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{
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/* copy event struct */
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RtlMoveMemory(&Event, IoStack->Parameters.DeviceIoControl.Type3InputBuffer, sizeof(KSEVENT));
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}
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FoundEventItem = NULL;
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FoundEventSet = NULL;
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if (IsEqualGUIDAligned(&Event.Set, &GUID_NULL) && Event.Id == 0 && Event.Flags == KSEVENT_TYPE_SETSUPPORT)
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{
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// store output size
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Irp->IoStatus.Information = sizeof(GUID) * EventSetsCount;
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(GUID) * EventSetsCount)
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{
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// buffer too small
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return STATUS_MORE_ENTRIES;
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}
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// get output buffer
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Guid = (LPGUID)Irp->UserBuffer;
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// copy property guids from property sets
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for(Index = 0; Index < EventSetsCount; Index++)
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{
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RtlMoveMemory(&Guid[Index], EventSet[Index].Set, sizeof(GUID));
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}
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return STATUS_SUCCESS;
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}
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/* now try to find event set */
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for(Index = 0; Index < EventSetsCount; Index++)
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{
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if (IsEqualGUIDAligned(&Event.Set, EventSet[Index].Set))
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{
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EventItem = (PKSEVENT_ITEM)EventSet[Index].EventItem;
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/* sanity check */
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ASSERT(EventSet[Index].EventsCount);
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ASSERT(EventItem);
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/* now find matching event id */
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for(SubIndex = 0; SubIndex < EventSet[Index].EventsCount; SubIndex++)
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{
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if (EventItem[SubIndex].EventId == Event.Id)
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{
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/* found event item */
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FoundEventItem = &EventItem[SubIndex];
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FoundEventSet = &EventSet[Index];
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break;
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}
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}
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if (FoundEventSet)
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break;
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}
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}
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if (!FoundEventSet)
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{
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UNICODE_STRING GuidString;
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RtlStringFromGUID(&Event.Set, &GuidString);
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DPRINT("Guid %S Id %u Flags %x not found\n", GuidString.Buffer, Event.Id, Event.Flags);
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RtlFreeUnicodeString(&GuidString);
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return STATUS_PROPSET_NOT_FOUND;
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}
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if (IoStack->Parameters.DeviceIoControl.OutputBufferLength < FoundEventItem->DataInput)
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{
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/* buffer too small */
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DPRINT1("Got %u expected %u\n", IoStack->Parameters.DeviceIoControl.OutputBufferLength, FoundEventItem->DataInput);
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return STATUS_SUCCESS;
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}
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if (!FoundEventItem->AddHandler && !EventsList)
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{
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/* no add handler and no list to add the new entry to */
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return STATUS_INVALID_PARAMETER;
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}
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/* get event data */
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EventData = Irp->UserBuffer;
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/* sanity check */
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ASSERT(EventData);
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if (Irp->RequestorMode == UserMode)
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{
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if (EventData->NotificationType == KSEVENTF_SEMAPHORE_HANDLE)
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{
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/* get semaphore object handle */
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Status = ObReferenceObjectByHandle(EventData->SemaphoreHandle.Semaphore, SEMAPHORE_MODIFY_STATE, ExSemaphoreObjectType, Irp->RequestorMode, &Object, NULL);
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if (!NT_SUCCESS(Status))
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{
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/* invalid semaphore handle */
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return STATUS_INVALID_PARAMETER;
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}
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}
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else if (EventData->NotificationType == KSEVENTF_EVENT_HANDLE)
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{
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/* get event object handle */
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Status = ObReferenceObjectByHandle(EventData->EventHandle.Event, EVENT_MODIFY_STATE, ExEventObjectType, Irp->RequestorMode, &Object, NULL);
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if (!NT_SUCCESS(Status))
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{
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/* invalid event handle */
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return STATUS_INVALID_PARAMETER;
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}
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}
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else
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{
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/* user mode client can only pass an event or semaphore handle */
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return STATUS_INVALID_PARAMETER;
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}
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}
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else
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{
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if (EventData->NotificationType != KSEVENTF_EVENT_OBJECT &&
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EventData->NotificationType != KSEVENTF_SEMAPHORE_OBJECT &&
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EventData->NotificationType != KSEVENTF_DPC &&
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EventData->NotificationType != KSEVENTF_WORKITEM &&
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EventData->NotificationType != KSEVENTF_KSWORKITEM)
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{
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/* invalid type requested */
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return STATUS_INVALID_PARAMETER;
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}
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}
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/* calculate request size */
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Size = sizeof(KSEVENT_ENTRY) + FoundEventItem->ExtraEntryData;
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/* do we have an allocator */
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if (Allocator)
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{
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/* allocate event entry */
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Status = Allocator(Irp, Size, FALSE);
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if (!NT_SUCCESS(Status))
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{
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/* failed */
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return Status;
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}
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/* assume the caller put it there */
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EventEntry = KSEVENT_ENTRY_IRP_STORAGE(Irp);
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}
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else
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{
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/* allocate it from nonpaged pool */
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EventEntry = AllocateItem(NonPagedPool, Size);
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}
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if (!EventEntry)
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{
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/* not enough memory */
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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/* zero event entry */
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RtlZeroMemory(EventEntry, Size);
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/* initialize event entry */
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EventEntry->EventData = EventData;
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EventEntry->NotificationType = EventData->NotificationType;
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EventEntry->EventItem = FoundEventItem;
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EventEntry->EventSet = FoundEventSet;
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EventEntry->FileObject = IoStack->FileObject;
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switch(EventEntry->NotificationType)
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{
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case KSEVENTF_EVENT_HANDLE:
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EventEntry->Object = Object;
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EventEntry->Reserved = 0;
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break;
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case KSEVENTF_SEMAPHORE_HANDLE:
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EventEntry->Object = Object;
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EventEntry->SemaphoreAdjustment = EventData->SemaphoreHandle.Adjustment;
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EventEntry->Reserved = 0;
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break;
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case KSEVENTF_EVENT_OBJECT:
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EventEntry->Object = EventData->EventObject.Event;
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EventEntry->Reserved = EventData->EventObject.Increment;
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break;
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case KSEVENTF_SEMAPHORE_OBJECT:
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EventEntry->Object = EventData->SemaphoreObject.Semaphore;
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EventEntry->SemaphoreAdjustment = EventData->SemaphoreObject.Adjustment;
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EventEntry->Reserved = EventData->SemaphoreObject.Increment;
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break;
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case KSEVENTF_DPC:
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EventEntry->Object = EventData->Dpc.Dpc;
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EventData->Dpc.ReferenceCount = 0;
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break;
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case KSEVENTF_WORKITEM:
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EventEntry->Object = EventData->WorkItem.WorkQueueItem;
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EventEntry->BufferItem = (PKSBUFFER_ITEM)UlongToPtr(EventData->WorkItem.WorkQueueType);
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break;
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case KSEVENTF_KSWORKITEM:
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EventEntry->Object = EventData->KsWorkItem.KsWorkerObject;
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EventEntry->DpcItem = (PKSDPC_ITEM)EventData->KsWorkItem.WorkQueueItem;
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break;
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default:
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/* should not happen */
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ASSERT(0);
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}
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if (FoundEventItem->AddHandler)
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{
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/* now add the event */
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Status = FoundEventItem->AddHandler(Irp, EventData, EventEntry);
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if (!NT_SUCCESS(Status))
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{
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/* discard event entry */
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KsDiscardEvent(EventEntry);
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}
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}
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else
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{
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/* setup context */
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Ctx.List = EventsList;
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Ctx.EventEntry = EventEntry;
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/* add the event */
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(void)KspSynchronizedEventRoutine(EventsFlags, EventsLock, SyncAddEvent, &Ctx);
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Status = STATUS_SUCCESS;
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}
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/* done */
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return Status;
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsEnableEvent(
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IN PIRP Irp,
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IN ULONG EventSetsCount,
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IN KSEVENT_SET* EventSet,
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IN OUT PLIST_ENTRY EventsList OPTIONAL,
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IN KSEVENTS_LOCKTYPE EventsFlags OPTIONAL,
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IN PVOID EventsLock OPTIONAL)
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{
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return KspEnableEvent(Irp, EventSetsCount, EventSet, EventsList, EventsFlags, EventsLock, NULL, 0);
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsEnableEventWithAllocator(
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IN PIRP Irp,
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IN ULONG EventSetsCount,
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IN PKSEVENT_SET EventSet,
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IN OUT PLIST_ENTRY EventsList OPTIONAL,
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IN KSEVENTS_LOCKTYPE EventsFlags OPTIONAL,
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IN PVOID EventsLock OPTIONAL,
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IN PFNKSALLOCATOR Allocator OPTIONAL,
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IN ULONG EventItemSize OPTIONAL)
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{
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return KspEnableEvent(Irp, EventSetsCount, EventSet, EventsList, EventsFlags, EventsLock, Allocator, EventItemSize);
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}
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BOOLEAN
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NTAPI
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KspDisableEvent(
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IN PKSEVENT_CTX Ctx)
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{
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PIO_STACK_LOCATION IoStack;
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PKSEVENTDATA EventData;
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PKSEVENT_ENTRY EventEntry;
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PLIST_ENTRY Entry;
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/* get current irp stack location */
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IoStack = IoGetCurrentIrpStackLocation(Ctx->Irp);
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/* get event data */
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EventData = (PKSEVENTDATA)IoStack->Parameters.DeviceIoControl.Type3InputBuffer;
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if (!Ctx || !Ctx->List || !Ctx->FileObject || !Ctx->Irp)
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{
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/* invalid parameter */
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return FALSE;
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}
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/* point to first entry */
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Entry = Ctx->List->Flink;
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while(Entry != Ctx->List)
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{
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/* get event entry */
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EventEntry = (PKSEVENT_ENTRY)CONTAINING_RECORD(Entry, KSEVENT_ENTRY, ListEntry);
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if (EventEntry->EventData == EventData && EventEntry->FileObject == Ctx->FileObject)
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{
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/* found the entry */
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RemoveEntryList(&EventEntry->ListEntry);
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Ctx->EventEntry = EventEntry;
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return TRUE;
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}
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/* move to next item */
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Entry = Entry->Flink;
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}
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/* entry not found */
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return TRUE;
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}
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/*
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@implemented
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*/
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KSDDKAPI
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NTSTATUS
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NTAPI
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KsDisableEvent(
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IN PIRP Irp,
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IN OUT PLIST_ENTRY EventsList,
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IN KSEVENTS_LOCKTYPE EventsFlags,
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IN PVOID EventsLock)
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{
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PIO_STACK_LOCATION IoStack;
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KSEVENT_CTX Ctx;
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/* get current irp stack location */
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IoStack = IoGetCurrentIrpStackLocation(Irp);
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/* is there a event entry */
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if (IoStack->Parameters.DeviceIoControl.InputBufferLength < sizeof(KSEVENTDATA))
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{
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if (IoStack->Parameters.DeviceIoControl.InputBufferLength == 0)
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{
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/* caller wants to free event items */
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KsFreeEventList(IoStack->FileObject, EventsList, EventsFlags, EventsLock);
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return STATUS_SUCCESS;
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}
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/* invalid parameter */
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return STATUS_INVALID_BUFFER_SIZE;
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}
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/* setup event ctx */
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Ctx.List = EventsList;
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Ctx.FileObject = IoStack->FileObject;
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Ctx.Irp = Irp;
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Ctx.EventEntry = NULL;
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if (KspSynchronizedEventRoutine(EventsFlags, EventsLock, KspDisableEvent, &Ctx))
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{
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/* was the event entry found */
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if (Ctx.EventEntry)
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{
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/* discard event */
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KsDiscardEvent(Ctx.EventEntry);
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return STATUS_SUCCESS;
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}
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/* event was not found */
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return STATUS_UNSUCCESSFUL;
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}
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/* invalid parameters */
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return STATUS_INVALID_PARAMETER;
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}
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|
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/*
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@implemented
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*/
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KSDDKAPI
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VOID
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NTAPI
|
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KsDiscardEvent(
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IN PKSEVENT_ENTRY EventEntry)
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{
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/* sanity check */
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ASSERT(EventEntry->Object);
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if (EventEntry->NotificationType == KSEVENTF_SEMAPHORE_HANDLE || EventEntry->NotificationType == KSEVENTF_EVENT_HANDLE)
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{
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/* release object */
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ObDereferenceObject(EventEntry->Object);
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}
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/* free event entry */
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FreeItem(EventEntry);
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}
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BOOLEAN
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NTAPI
|
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KspFreeEventList(
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IN PKSEVENT_CTX Ctx)
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|
{
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PLIST_ENTRY Entry;
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PKSEVENT_ENTRY EventEntry;
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|
|
/* check valid input */
|
|
if (!Ctx || !Ctx->List)
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return FALSE;
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|
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if (IsListEmpty(Ctx->List))
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return FALSE;
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|
|
/* remove first entry */
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Entry = RemoveHeadList(Ctx->List);
|
|
if (!Entry)
|
|
{
|
|
/* list is empty, bye-bye */
|
|
return FALSE;
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}
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|
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/* get event entry */
|
|
EventEntry = (PKSEVENT_ENTRY)CONTAINING_RECORD(Entry, KSEVENT_ENTRY, ListEntry);
|
|
|
|
/* store event entry */
|
|
Ctx->EventEntry = EventEntry;
|
|
/* return success */
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
KSDDKAPI
|
|
VOID
|
|
NTAPI
|
|
KsFreeEventList(
|
|
IN PFILE_OBJECT FileObject,
|
|
IN OUT PLIST_ENTRY EventsList,
|
|
IN KSEVENTS_LOCKTYPE EventsFlags,
|
|
IN PVOID EventsLock)
|
|
{
|
|
KSEVENT_CTX Ctx;
|
|
|
|
/* setup event ctx */
|
|
Ctx.List = EventsList;
|
|
Ctx.FileObject = FileObject;
|
|
Ctx.EventEntry = NULL;
|
|
|
|
while(KspSynchronizedEventRoutine(EventsFlags, EventsLock, KspFreeEventList, &Ctx))
|
|
{
|
|
if (Ctx.EventEntry)
|
|
{
|
|
KsDiscardEvent(Ctx.EventEntry);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
KSDDKAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
KsGenerateEvent(
|
|
IN PKSEVENT_ENTRY EntryEvent)
|
|
{
|
|
if (EntryEvent->NotificationType == KSEVENTF_EVENT_HANDLE || EntryEvent->NotificationType == KSEVENTF_EVENT_OBJECT)
|
|
{
|
|
/* signal event */
|
|
KeSetEvent(EntryEvent->Object, EntryEvent->Reserved, FALSE);
|
|
}
|
|
else if (EntryEvent->NotificationType == KSEVENTF_SEMAPHORE_HANDLE || EntryEvent->NotificationType == KSEVENTF_SEMAPHORE_OBJECT)
|
|
{
|
|
/* release semaphore */
|
|
KeReleaseSemaphore(EntryEvent->Object, EntryEvent->Reserved, EntryEvent->SemaphoreAdjustment, FALSE);
|
|
}
|
|
else if (EntryEvent->NotificationType == KSEVENTF_DPC)
|
|
{
|
|
/* increment reference count to indicate dpc is pending */
|
|
InterlockedIncrement((PLONG)&EntryEvent->EventData->Dpc.ReferenceCount);
|
|
/* queue dpc */
|
|
KeInsertQueueDpc((PRKDPC)EntryEvent->Object, NULL, NULL);
|
|
}
|
|
else if (EntryEvent->NotificationType == KSEVENTF_WORKITEM)
|
|
{
|
|
/* queue work item */
|
|
ExQueueWorkItem((PWORK_QUEUE_ITEM)EntryEvent->Object, PtrToUlong(EntryEvent->BufferItem));
|
|
}
|
|
else if (EntryEvent->NotificationType == KSEVENTF_KSWORKITEM)
|
|
{
|
|
/* queue work item of ks worker */
|
|
return KsQueueWorkItem((PKSWORKER)EntryEvent->Object, (PWORK_QUEUE_ITEM)EntryEvent->DpcItem);
|
|
}
|
|
else
|
|
{
|
|
/* unsupported type requested */
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
@unimplemented
|
|
*/
|
|
KSDDKAPI
|
|
NTSTATUS
|
|
NTAPI
|
|
KsGenerateDataEvent(
|
|
IN PKSEVENT_ENTRY EventEntry,
|
|
IN ULONG DataSize,
|
|
IN PVOID Data)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/*
|
|
@unimplemented
|
|
*/
|
|
KSDDKAPI
|
|
VOID
|
|
NTAPI
|
|
KsGenerateEventList(
|
|
IN GUID* Set OPTIONAL,
|
|
IN ULONG EventId,
|
|
IN PLIST_ENTRY EventsList,
|
|
IN KSEVENTS_LOCKTYPE EventsFlags,
|
|
IN PVOID EventsLock)
|
|
{
|
|
UNIMPLEMENTED
|
|
}
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
KSDDKAPI
|
|
VOID
|
|
NTAPI
|
|
KsAddEvent(
|
|
IN PVOID Object,
|
|
IN PKSEVENT_ENTRY EventEntry)
|
|
{
|
|
PKSBASIC_HEADER Header = (PKSBASIC_HEADER)((ULONG_PTR)Object - sizeof(KSBASIC_HEADER));
|
|
|
|
ExInterlockedInsertTailList(&Header->EventList, &EventEntry->ListEntry, &Header->EventListLock);
|
|
}
|
|
|
|
/*
|
|
@implemented
|
|
*/
|
|
NTSTATUS
|
|
NTAPI
|
|
KsDefaultAddEventHandler(
|
|
IN PIRP Irp,
|
|
IN PKSEVENTDATA EventData,
|
|
IN OUT PKSEVENT_ENTRY EventEntry)
|
|
{
|
|
PIO_STACK_LOCATION IoStack;
|
|
PKSIOBJECT_HEADER ObjectHeader;
|
|
PKSBASIC_HEADER Header;
|
|
|
|
/* first get the io stack location */
|
|
IoStack = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/* now get the object header */
|
|
ObjectHeader =(PKSIOBJECT_HEADER)IoStack->FileObject->FsContext2;
|
|
|
|
/* sanity check */
|
|
ASSERT(ObjectHeader->ObjectType);
|
|
|
|
/* obtain basic header */
|
|
Header = (PKSBASIC_HEADER)((ULONG_PTR)ObjectHeader->ObjectType - sizeof(KSBASIC_HEADER));
|
|
|
|
/* now insert the event entry */
|
|
ExInterlockedInsertTailList(&Header->EventList, &EventEntry->ListEntry, &Header->EventListLock);
|
|
|
|
/* done */
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
@unimplemented
|
|
*/
|
|
KSDDKAPI
|
|
void
|
|
NTAPI
|
|
KsGenerateEvents(
|
|
IN PVOID Object,
|
|
IN const GUID* EventSet OPTIONAL,
|
|
IN ULONG EventId,
|
|
IN ULONG DataSize,
|
|
IN PVOID Data OPTIONAL,
|
|
IN PFNKSGENERATEEVENTCALLBACK CallBack OPTIONAL,
|
|
IN PVOID CallBackContext OPTIONAL)
|
|
{
|
|
UNIMPLEMENTED
|
|
}
|