[ion] 15069: More IRP Completion changes. Use proper stack count and other semantics, as documented in NT File System Internals. These changes don't break anything :P
7 May
2005
7 May
'05
1:13 a.m.
More IRP Completion changes. Use proper stack count and other semantics,
as documented in NT File System Internals. These changes don't break
anything :P
Modified: trunk/reactos/ntoskrnl/io/irp.c
_____
Modified: trunk/reactos/ntoskrnl/io/irp.c
--- trunk/reactos/ntoskrnl/io/irp.c 2005-05-07 00:37:48 UTC (rev
15068)
+++ trunk/reactos/ntoskrnl/io/irp.c 2005-05-07 01:13:04 UTC (rev
15069)
@@ -19,6 +19,187 @@
#define TAG_IRP TAG('I', 'R', 'P', ' ')
#define TAG_SYS_BUF TAG('S', 'Y', 'S' , 'B')
+/* PRIVATE FUNCTIONS
********************************************************/
+
+VOID
+STDCALL
+IopFreeIrpKernelApc(PKAPC Apc,
+ PKNORMAL_ROUTINE *NormalRoutine,
+ PVOID *NormalContext,
+ PVOID *SystemArgument1,
+ PVOID *SystemArgument2)
+{
+ /* Free the IRP */
+ IoFreeIrp(CONTAINING_RECORD(Apc, IRP, Tail.Apc));
+}
+
+VOID
+STDCALL
+IopAbortIrpKernelApc(PKAPC Apc)
+{
+ /* Free the IRP */
+ IoFreeIrp(CONTAINING_RECORD(Apc, IRP, Tail.Apc));
+}
+
+/*
+ * FUNCTION: Performs the second stage of irp completion for read/write
irps
+ *
+ * Called as a special kernel APC kernel-routine or directly from
IofCompleteRequest()
+ *
+ * Note that we'll never see irp's flagged IRP_PAGING_IO
(IRP_MOUNT_OPERATION)
+ * or IRP_CLOSE_OPERATION (IRP_MJ_CLOSE and IRP_MJ_CLEANUP) here since
their
+ * cleanup/completion is fully taken care of in IoCompleteRequest.
+ * -Gunnar
+ */
+VOID
+STDCALL
+IopCompleteRequest(PKAPC Apc,
+ PKNORMAL_ROUTINE* NormalRoutine,
+ PVOID* NormalContext,
+ PVOID* SystemArgument1,
+ PVOID* SystemArgument2)
+{
+ PFILE_OBJECT FileObject;
+ PIRP Irp;
+ PMDL Mdl, NextMdl;
+ PKEVENT UserEvent;
+ BOOLEAN SyncIrp;
+
+ if (Apc) DPRINT("IoSecondStageCompletition with APC: %x\n", Apc);
+
+ /* Get data from the APC */
+ FileObject = (PFILE_OBJECT)(*SystemArgument1);
+ Irp = CONTAINING_RECORD(Apc, IRP, Tail.Apc);
+ DPRINT("IoSecondStageCompletition, %x\n", Irp);
+
+ /* Save the User Event */
+ UserEvent = Irp->UserEvent;
+
+ /* Remember if the IRP is Sync or not */
+ SyncIrp = Irp->Flags & IRP_SYNCHRONOUS_API ? TRUE : FALSE;
+
+ /* Handle Buffered case first */
+ if (Irp->Flags & IRP_BUFFERED_IO)
+ {
+ /* Check if we have an input buffer and if we suceeded */
+ if (Irp->Flags & IRP_INPUT_OPERATION &&
NT_SUCCESS(Irp->IoStatus.Status))
+ {
+ /* Copy the buffer back to the user */
+ RtlCopyMemory(Irp->UserBuffer,
+ Irp->AssociatedIrp.SystemBuffer,
+ Irp->IoStatus.Information);
+ }
+
+ /* Also check if we should de-allocate it */
+ if (Irp->Flags & IRP_DEALLOCATE_BUFFER)
+ {
+ ExFreePoolWithTag(Irp->AssociatedIrp.SystemBuffer,
TAG_SYS_BUF);
+ }
+ }
+
+ /* Now we got rid of these two... */
+ Irp->Flags &= ~(IRP_BUFFERED_IO | IRP_DEALLOCATE_BUFFER);
+
+ /* Check if there's an MDL */
+ if ((Mdl = Irp->MdlAddress))
+ {
+ /* Clear all of them */
+ do
+ {
+ NextMdl = Mdl->Next;
+ IoFreeMdl(Mdl);
+ Mdl = NextMdl;
+ } while (Mdl);
+ }
+ Irp->MdlAddress = NULL;
+
+ /* Remove the IRP from the list of Thread Pending IRPs */
+ RemoveEntryList(&Irp->ThreadListEntry);
+ InitializeListHead(&Irp->ThreadListEntry);
+
+ if (NT_SUCCESS(Irp->IoStatus.Status) || Irp->PendingReturned)
+ {
+ _SEH_TRY
+ {
+ /* Save the IOSB Information */
+ *Irp->UserIosb = Irp->IoStatus;
+ }
+ _SEH_HANDLE
+ {
+ /* Ignore any error */
+ }
+ _SEH_END;
+
+ if (FileObject)
+ {
+ if (FileObject->Flags & FO_SYNCHRONOUS_IO)
+ {
+ /* Set the Status */
+ FileObject->FinalStatus = Irp->IoStatus.Status;
+
+ /* FIXME: Remove this check when I/O code is fixed */
+ if (UserEvent != &FileObject->Event)
+ {
+ /* Signal Event */
+ KeSetEvent(&FileObject->Event, 0, FALSE);
+ }
+ }
+ }
+
+ /* Signal the user event, if one exist */
+ if (UserEvent)
+ {
+ KeSetEvent(UserEvent, 0, FALSE);
+ }
+
+ /* Now call the User APC if one was requested */
+ if (Irp->Overlay.AsynchronousParameters.UserApcRoutine)
+ {
+ KeInitializeApc(&Irp->Tail.Apc,
+ KeGetCurrentThread(),
+ CurrentApcEnvironment,
+ IopFreeIrpKernelApc,
+ IopAbortIrpKernelApc,
+
(PKNORMAL_ROUTINE)Irp->Overlay.AsynchronousParameters.UserApcRoutine,
+ Irp->RequestorMode,
+
Irp->Overlay.AsynchronousParameters.UserApcContext);
+
+ KeInsertQueueApc(&Irp->Tail.Apc,
+ Irp->UserIosb,
+ NULL,
+ 2);
+ Irp = NULL;
+ }
+ else if (FileObject && FileObject->CompletionContext)
+ {
+ /* Call the IO Completion Port if we have one, instead */
+ IoSetIoCompletion(FileObject->CompletionContext->Port,
+ FileObject->CompletionContext->Key,
+
Irp->Overlay.AsynchronousParameters.UserApcContext,
+ Irp->IoStatus.Status,
+ Irp->IoStatus.Information,
+ FALSE);
+ Irp = NULL;
+ }
+ }
+
+ /* Free the Irp if it hasn't already */
+ if (Irp) IoFreeIrp(Irp);
+
+ if (FileObject)
+ {
+ /* Dereference the user event, if it is an event object */
+ /* FIXME: Remove last check when I/O code is fixed */
+ if (UserEvent && !SyncIrp && UserEvent !=
&FileObject->Event)
+ {
+ ObDereferenceObject(UserEvent);
+ }
+
+ /* Dereference the File Object */
+ ObDereferenceObject(FileObject);
+ }
+}
+
/* FUNCTIONS
*****************************************************************/
/*
@@ -628,11 +809,7 @@
#endif
/*
* @implemented
- */
-VOID FASTCALL
-IofCompleteRequest(PIRP Irp,
- CCHAR PriorityBoost)
-/*
+ *
* FUNCTION: Indicates the caller has finished all processing for a
given
* I/O request and is returning the given IRP to the I/O manager
* ARGUMENTS:
@@ -640,211 +817,190 @@
* PriorityBoost = Increment by which to boost the priority of
the
* thread making the request
*/
+VOID
+FASTCALL
+IofCompleteRequest(PIRP Irp,
+ CCHAR PriorityBoost)
{
- ULONG i;
- NTSTATUS Status;
- PFILE_OBJECT OriginalFileObject;
- PDEVICE_OBJECT DeviceObject;
- KIRQL oldIrql;
- PMDL Mdl;
- PIO_STACK_LOCATION Stack = (PIO_STACK_LOCATION)(Irp + 1);
+ PIO_STACK_LOCATION StackPtr;
+ PDEVICE_OBJECT DeviceObject;
+ PFILE_OBJECT FileObject = Irp->Tail.Overlay.OriginalFileObject;
+ PETHREAD Thread = Irp->Tail.Overlay.Thread;
+ NTSTATUS Status;
+ PMDL Mdl;
- DPRINT("IoCompleteRequest(Irp %x, PriorityBoost %d) Event %x THread
%x\n",
- Irp,PriorityBoost, Irp->UserEvent, PsGetCurrentThread());
+ DPRINT("IofCompleteRequest(Irp %x, PriorityBoost %d) Event %x
THread %x\n",
+ Irp,PriorityBoost, Irp->UserEvent, PsGetCurrentThread());
- ASSERT(KeGetCurrentIrql() <= DISPATCH_LEVEL);
- ASSERT(Irp->CancelRoutine == NULL);
- ASSERT(Irp->IoStatus.Status != STATUS_PENDING);
+ ASSERT(KeGetCurrentIrql() <= DISPATCH_LEVEL);
+ ASSERT(!Irp->CancelRoutine);
+ ASSERT(Irp->IoStatus.Status != STATUS_PENDING);
+
+ /* Get the Current Stack */
+ StackPtr = IoGetCurrentIrpStackLocation(Irp);
+ IoSkipCurrentIrpStackLocation(Irp);
+
+ /* Loop the Stacks and complete the IRPs */
+ for (;Irp->CurrentLocation <= (Irp->StackCount + 1); StackPtr++)
+ {
+ /* Set Pending Returned */
+ Irp->PendingReturned = StackPtr->Control & SL_PENDING_RETURNED;
+
+ /*
+ * Completion routines expect the current irp stack location to
be the same as when
+ * IoSetCompletionRoutine was called to set them. A side effect
is that completion
+ * routines set by highest level drivers without their own
stack location will receive
+ * an invalid current stack location (at least it should be
considered as invalid).
+ * Since the DeviceObject argument passed is taken from the
current stack, this value
+ * is also invalid (NULL).
+ */
+ if (Irp->CurrentLocation == (Irp->StackCount + 1))
+ {
+ DeviceObject = NULL;
+ }
+ else
+ {
+ DeviceObject =
IoGetCurrentIrpStackLocation(Irp)->DeviceObject;
+ }
- Irp->PendingReturned = IoGetCurrentIrpStackLocation(Irp)->Control &
SL_PENDING_RETURNED;
-
- /*
- * Run the completion routines.
- */
+ /* Check if there is a Completion Routine to Call */
+ if ((NT_SUCCESS(Irp->IoStatus.Status) &&
+ (StackPtr->Control & SL_INVOKE_ON_SUCCESS)) ||
+ (!NT_SUCCESS(Irp->IoStatus.Status) &&
+ (StackPtr->Control & SL_INVOKE_ON_ERROR)) ||
+ (Irp->Cancel && (StackPtr->Control &
SL_INVOKE_ON_CANCEL)))
+ {
+ /* Call it */
+ Status = StackPtr->CompletionRoutine(DeviceObject,
+ Irp,
+ StackPtr->Context);
- for (i=Irp->CurrentLocation;i<(ULONG)Irp->StackCount;i++)
- {
- /*
- Completion routines expect the current irp stack location to be
the same as when
- IoSetCompletionRoutine was called to set them. A side effect is
that completion
- routines set by highest level drivers without their own stack
location will receive
- an invalid current stack location (at least it should be
considered as invalid).
- Since the DeviceObject argument passed is taken from the current
stack, this value
- is also invalid (NULL).
- */
- if (Irp->CurrentLocation < Irp->StackCount - 1)
- {
- IoSkipCurrentIrpStackLocation(Irp);
- DeviceObject =
IoGetCurrentIrpStackLocation(Irp)->DeviceObject;
- }
- else
- {
- DeviceObject = NULL;
- }
+ /* Don't touch the Packet if this was returned. It might be
gone! */
+ if (Status == STATUS_MORE_PROCESSING_REQUIRED) return;
+ }
+ else
+ {
+ if ((Irp->CurrentLocation <= Irp->StackCount) &&
(Irp->PendingReturned))
+ {
+ if (IoGetCurrentIrpStackLocation(Irp)->Control &
SL_PENDING_RETURNED)
+ {
+ Irp->PendingReturned = TRUE;
+ }
+ }
+ }
+
+ /* Move to next stack */
+ IoSkipCurrentIrpStackLocation(Irp);
+ }
- if (Stack[i].CompletionRoutine != NULL &&
- ((NT_SUCCESS(Irp->IoStatus.Status) && (Stack[i].Control &
SL_INVOKE_ON_SUCCESS)) ||
- (!NT_SUCCESS(Irp->IoStatus.Status) && (Stack[i].Control &
SL_INVOKE_ON_ERROR)) ||
- (Irp->Cancel && (Stack[i].Control & SL_INVOKE_ON_CANCEL))))
- {
- Status = Stack[i].CompletionRoutine(DeviceObject,
- Irp,
- Stack[i].Context);
+ /* Windows NT File System Internals, page 165 */
+ if (Irp->Flags & IRP_ASSOCIATED_IRP)
+ {
+ ULONG MasterIrpCount;
+ PIRP MasterIrp = Irp->AssociatedIrp.MasterIrp;
- if (Status == STATUS_MORE_PROCESSING_REQUIRED)
- {
- return;
- }
- }
-
- if (IoGetCurrentIrpStackLocation(Irp)->Control &
SL_PENDING_RETURNED)
- {
- Irp->PendingReturned = TRUE;
- }
- }
+ DPRINT("Handling Associated IRP\n");
+ /* This should never happen! */
+ ASSERT(IsListEmpty(&Irp->ThreadListEntry));
- /* Windows NT File System Internals, page 165 */
- if (Irp->Flags & IRP_ASSOCIATED_IRP)
- {
- ULONG MasterIrpCount;
- PIRP MasterIrp = Irp->AssociatedIrp.MasterIrp;
-
- /* This should never happen! */
- ASSERT(IsListEmpty(&Irp->ThreadListEntry));
-
- MasterIrpCount =
InterlockedDecrement(&MasterIrp->AssociatedIrp.IrpCount);
- while ((Mdl = Irp->MdlAddress))
- {
- Irp->MdlAddress = Mdl->Next;
- IoFreeMdl(Mdl);
- }
- IoFreeIrp(Irp);
- if (MasterIrpCount == 0)
- {
- IofCompleteRequest(MasterIrp, IO_NO_INCREMENT);
- }
- return;
- }
-
- /*
- * Were done calling completion routines. Now do any cleanup that
can be
- * done in an arbitrarily context.
- */
-
- /* Windows NT File System Internals, page 165 */
- if (Irp->Flags & (IRP_PAGING_IO|IRP_CLOSE_OPERATION))
- {
- /* This should never happen! */
- ASSERT(IsListEmpty(&Irp->ThreadListEntry));
-
- /*
- * If MDL_IO_PAGE_READ is set, then the caller is responsible
- * for deallocating of the mdl.
- */
- if (Irp->Flags & IRP_PAGING_IO &&
- Irp->MdlAddress &&
- !(Irp->MdlAddress->MdlFlags & MDL_IO_PAGE_READ))
- {
-
- if (Irp->MdlAddress->MdlFlags & MDL_MAPPED_TO_SYSTEM_VA)
- {
- MmUnmapLockedPages(Irp->MdlAddress->MappedSystemVa,
Irp->MdlAddress);
- }
-
- ExFreePool(Irp->MdlAddress);
- }
-
- if (Irp->UserIosb)
- {
- _SEH_TRY
- {
- *Irp->UserIosb = Irp->IoStatus;
- }
- _SEH_HANDLE
- {
- DPRINT1("Unable to set UserIosb (at 0x%x) to 0x%x, Error:
0x%x\n",
- Irp->UserIosb, Irp->IoStatus,
_SEH_GetExceptionCode());
- }
- _SEH_END;
- }
-
- if (Irp->UserEvent)
- {
- KeSetEvent(Irp->UserEvent, PriorityBoost, FALSE);
- }
+ /* Decrement and get the old count */
+ MasterIrpCount =
InterlockedDecrement(&MasterIrp->AssociatedIrp.IrpCount);
+
+ /* Free MDLs and IRP */
+ while ((Mdl = Irp->MdlAddress))
+ {
+ Irp->MdlAddress = Mdl->Next;
+ IoFreeMdl(Mdl);
+ }
+ IoFreeIrp(Irp);
- /* io manager frees the irp for close operations */
-// if (Irp->Flags & IRP_PAGING_IO)
-// {
- IoFreeIrp(Irp);
-// }
-
- return;
- }
-
-
- /*
- Hi Dave,
-
- I went through my old notes. You are correct and in most cases
- IoCompleteRequest() will issue an MmUnlockPages() for each MDL in
the IRP
- chain. There are however few exceptions: one is MDLs for associated
IRPs,
- it's expected that those MDLs have been initialized with
- IoBuildPartialMdl(). Another exception is PAGING_IO irps, the i/o
completion
- code doesn't do anything to MDLs of those IRPs.
-
- sara
-
-*/
-
+ /* Complete the Master IRP */
+ if (!MasterIrpCount) IofCompleteRequest(MasterIrp,
IO_NO_INCREMENT);
+ return;
+ }
- for (Mdl = Irp->MdlAddress; Mdl; Mdl = Mdl->Next)
- {
- /*
- * Undo the MmProbeAndLockPages. If MmGetSystemAddressForMdl was
called
- * on this mdl, this mapping (if any) is also undone by
MmUnlockPages.
- */
- MmUnlockPages(Mdl);
- }
-
- //Windows NT File System Internals, page 154
- OriginalFileObject = Irp->Tail.Overlay.OriginalFileObject;
+ /* Windows NT File System Internals, page 165 */
+ if (Irp->Flags & (IRP_PAGING_IO|IRP_CLOSE_OPERATION))
+ {
+ DPRINT("Handling Paging or Close I/O\n");
+ /* This should never happen! */
+ ASSERT(IsListEmpty(&Irp->ThreadListEntry));
- if (Irp->PendingReturned || KeGetCurrentIrql() == DISPATCH_LEVEL)
- {
- BOOLEAN bStatus;
-
- DPRINT("Dispatching APC\n");
-
- KeInitializeApc( &Irp->Tail.Apc,
- &Irp->Tail.Overlay.Thread->Tcb,
- Irp->ApcEnvironment,
- IoSecondStageCompletion,//kernel routine
+ /* Handle a Close Operation or Sync Paging I/O (see page 165)
*/
+ if (Irp->Flags & (IRP_SYNCHRONOUS_PAGING_IO |
IRP_CLOSE_OPERATION))
+ {
+ /* Set the I/O Status and Signal the Event */
+ DPRINT("Handling Sync Paging or Close I/O\n");
+ *Irp->UserIosb = Irp->IoStatus;
+ KeSetEvent(Irp->UserEvent, PriorityBoost, FALSE);
+
+ /* Free the IRP for a Paging I/O Only, Close is handled by
us */
+ if (Irp->Flags & IRP_SYNCHRONOUS_PAGING_IO)
+ {
+ DPRINT("Handling Sync Paging I/O\n");
+ IoFreeIrp(Irp);
+ }
+ }
+ else
+ {
+ DPRINT1("BUG BUG, YOU SHOULDNT BE HERE\n");
+ #if 0
+ /* Page 166 */
+ /* When we'll actually support Async Paging I/O Properly...
*/
+ KeInitializeApc(&Irp->Tail.Apc
+ &Irp->tail.Overlay.Thread->Tcb,
+ Irp->ApcEnvironment,
+ IopCompletePageWrite,
+ NULL,
+ NULL,
+ KernelMode,
+ NULL);
+ KeInsertQueueApc(&Irp->Tail.Apc,
NULL,
- (PKNORMAL_ROUTINE) NULL,
- KernelMode,
- NULL);
-
- bStatus = KeInsertQueueApc(&Irp->Tail.Apc,
- (PVOID)OriginalFileObject,
- NULL, // This is used for REPARSE
stuff
- PriorityBoost);
+ NULL,
+ PriorityBoost);
+ #endif
+ }
+ return;
+ }
- if (bStatus == FALSE)
- {
- DPRINT1("Error queueing APC for thread. Thread has probably
exited.\n");
- }
+ /* Unlock MDL Pages, page 167. */
+ while ((Mdl = Irp->MdlAddress))
+ {
+ DPRINT("Unlocking MDL: %x\n", Mdl);
+ Irp->MdlAddress = Mdl->Next;
+ MmUnlockPages(Mdl);
+ }
- DPRINT("Finished dispatching APC\n");
- }
- else
- {
- DPRINT("Calling IoSecondStageCompletion routine directly\n");
- KeRaiseIrql(APC_LEVEL, &oldIrql);
-
IoSecondStageCompletion(&Irp->Tail.Apc,NULL,NULL,(PVOID)&OriginalFileObj
ect, NULL);
- KeLowerIrql(oldIrql);
- DPRINT("Finished completition routine\n");
- }
+ /* Check if we should exit because of a Deferred I/O (page 168) */
+ if (Irp->Flags & IRP_DEFER_IO_COMPLETION && !Irp->PendingReturned)
+ {
+ DPRINT("Quick return\n");
+ return;
+ }
+
+ /* Now queue the special APC */
+ if (!Irp->Cancel)
+ {
+ DPRINT("KMODE APC QUEUE\n");
+ KeInitializeApc(&Irp->Tail.Apc,
+ &Thread->Tcb,
+ Irp->ApcEnvironment,
+ IopCompleteRequest,
+ NULL,
+ (PKNORMAL_ROUTINE) NULL,
+ KernelMode,
+ NULL);
+ KeInsertQueueApc(&Irp->Tail.Apc,
+ FileObject,
+ NULL, /* This is used for REPARSE stuff */
+ PriorityBoost);
+ }
+ else
+ {
+ /* The IRP just got cancelled... don't think this happens in
ROS yet */
+ DPRINT1("The IRP was cancelled. Go Bug Alex\n");
+ }
}
/*
@@ -942,7 +1098,7 @@
Irp->Type = IO_TYPE_IRP;
Irp->Size = PacketSize;
Irp->StackCount = StackSize;
- Irp->CurrentLocation = StackSize;
+ Irp->CurrentLocation = StackSize + 1;
Irp->ApcEnvironment = KeGetCurrentThread()->ApcStateIndex;
Irp->Tail.Overlay.CurrentStackLocation = (PIO_STACK_LOCATION)(Irp +
1) + StackSize;
@@ -1181,183 +1337,4 @@
return IofCallDriver(DeviceObject, Irp);
}
-VOID
-STDCALL
-IoSecondStageCompletion_KernelApcRoutine(PKAPC Apc,
- PKNORMAL_ROUTINE
*NormalRoutine,
- PVOID *NormalContext,
- PVOID *SystemArgument1,
- PVOID *SystemArgument2)
-{
- /* Free the IRP */
- IoFreeIrp(CONTAINING_RECORD(Apc, IRP, Tail.Apc));
-}
-
-VOID
-STDCALL
-IoSecondStageCompletion_RundownApcRoutine(PKAPC Apc)
-{
- /* Free the IRP */
- IoFreeIrp(CONTAINING_RECORD(Apc, IRP, Tail.Apc));
-}
-
-/*
- * FUNCTION: Performs the second stage of irp completion for read/write
irps
- *
- * Called as a special kernel APC kernel-routine or directly from
IofCompleteRequest()
- *
- * Note that we'll never see irp's flagged IRP_PAGING_IO
(IRP_MOUNT_OPERATION)
- * or IRP_CLOSE_OPERATION (IRP_MJ_CLOSE and IRP_MJ_CLEANUP) here since
their
- * cleanup/completion is fully taken care of in IoCompleteRequest.
- * -Gunnar
- */
-VOID
-STDCALL
-IoSecondStageCompletion(PKAPC Apc,
- PKNORMAL_ROUTINE* NormalRoutine,
- PVOID* NormalContext,
- PVOID* SystemArgument1,
- PVOID* SystemArgument2)
-{
- PFILE_OBJECT FileObject;
- PIRP Irp;
- PMDL Mdl, NextMdl;
- PKEVENT UserEvent;
- BOOLEAN SyncIrp;
-
- if (Apc) DPRINT("IoSecondStageCompletition with APC: %x\n", Apc);
-
- /* Get data from the APC */
- FileObject = (PFILE_OBJECT)(*SystemArgument1);
- Irp = CONTAINING_RECORD(Apc, IRP, Tail.Apc);
- DPRINT("IoSecondStageCompletition, %x\n", Irp);
-
- /* Save the User Event */
- UserEvent = Irp->UserEvent;
-
- /* Remember if the IRP is Sync or not */
- SyncIrp = Irp->Flags & IRP_SYNCHRONOUS_API ? TRUE : FALSE;
-
- /* Handle Buffered case first */
- if (Irp->Flags & IRP_BUFFERED_IO)
- {
- /* Check if we have an input buffer and if we suceeded */
- if (Irp->Flags & IRP_INPUT_OPERATION &&
NT_SUCCESS(Irp->IoStatus.Status))
- {
- /* Copy the buffer back to the user */
- RtlCopyMemory(Irp->UserBuffer,
- Irp->AssociatedIrp.SystemBuffer,
- Irp->IoStatus.Information);
- }
-
- /* Also check if we should de-allocate it */
- if (Irp->Flags & IRP_DEALLOCATE_BUFFER)
- {
- ExFreePoolWithTag(Irp->AssociatedIrp.SystemBuffer,
TAG_SYS_BUF);
- }
- }
-
- /* Now we got rid of these two... */
- Irp->Flags &= ~(IRP_BUFFERED_IO | IRP_DEALLOCATE_BUFFER);
-
- /* Check if there's an MDL */
- if ((Mdl = Irp->MdlAddress))
- {
- /* Clear all of them */
- do
- {
- NextMdl = Mdl->Next;
- IoFreeMdl(Mdl);
- Mdl = NextMdl;
- } while (Mdl);
- }
- Irp->MdlAddress = NULL;
-
- /* Remove the IRP from the list of Thread Pending IRPs */
- RemoveEntryList(&Irp->ThreadListEntry);
- InitializeListHead(&Irp->ThreadListEntry);
-
- if (NT_SUCCESS(Irp->IoStatus.Status) || Irp->PendingReturned)
- {
- _SEH_TRY
- {
- /* Save the IOSB Information */
- *Irp->UserIosb = Irp->IoStatus;
- }
- _SEH_HANDLE
- {
- /* Ignore any error */
- }
- _SEH_END;
-
- if (FileObject)
- {
- if (FileObject->Flags & FO_SYNCHRONOUS_IO)
- {
- /* Set the Status */
- FileObject->FinalStatus = Irp->IoStatus.Status;
-
- /* FIXME: Remove this check when I/O code is fixed */
- if (UserEvent != &FileObject->Event)
- {
- /* Signal Event */
- KeSetEvent(&FileObject->Event, 0, FALSE);
- }
- }
- }
-
- /* Signal the user event, if one exist */
- if (UserEvent)
- {
- KeSetEvent(UserEvent, 0, FALSE);
- }
-
- /* Now call the User APC if one was requested */
- if (Irp->Overlay.AsynchronousParameters.UserApcRoutine)
- {
- KeInitializeApc(&Irp->Tail.Apc,
- KeGetCurrentThread(),
- CurrentApcEnvironment,
- IoSecondStageCompletion_KernelApcRoutine,
- IoSecondStageCompletion_RundownApcRoutine,
-
(PKNORMAL_ROUTINE)Irp->Overlay.AsynchronousParameters.UserApcRoutine,
- Irp->RequestorMode,
-
Irp->Overlay.AsynchronousParameters.UserApcContext);
-
- KeInsertQueueApc(&Irp->Tail.Apc,
- Irp->UserIosb,
- NULL,
- 2);
- Irp = NULL;
- }
- else if (FileObject && FileObject->CompletionContext)
- {
- /* Call the IO Completion Port if we have one, instead */
- IoSetIoCompletion(FileObject->CompletionContext->Port,
- FileObject->CompletionContext->Key,
-
Irp->Overlay.AsynchronousParameters.UserApcContext,
- Irp->IoStatus.Status,
- Irp->IoStatus.Information,
- FALSE);
- Irp = NULL;
- }
- }
-
- /* Free the Irp if it hasn't already */
- if (Irp) IoFreeIrp(Irp);
-
- if (FileObject)
- {
- /* Dereference the user event, if it is an event object */
- /* FIXME: Remove last check when I/O code is fixed */
- if (UserEvent && !SyncIrp && UserEvent !=
&FileObject->Event)
- {
- ObDereferenceObject(UserEvent);
- }
-
- /* Dereference the File Object */
- ObDereferenceObject(FileObject);
- }
-}
-
/* EOF */
7076
days inactive
7076
days old
0 comments
1 participants
participants (1)
-
ion＠svn.reactos.com