From 48c45bbe684fd62191ece5fe9ffa6c9ffba19b4b Mon Sep 17 00:00:00 2001
From: Pierre Schweitzer <pierre@reactos.org>
Date: Sun, 27 Jan 2013 16:18:00 +0000
Subject: [PATCH] [NTOSKRNL] Implement IoCancelFileOpen().

You can read: http://www.osronline.com/showThread.cfm?link=20807
Even though the proposed implementation is closer to W2K implementation than to W2K3 implementation

In W2K3, no IRP is issued with major close.

svn path=/trunk/; revision=58244
---
 reactos/ntoskrnl/io/iomgr/file.c | 54 ++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/reactos/ntoskrnl/io/iomgr/file.c b/reactos/ntoskrnl/io/iomgr/file.c
index 14d3c0c8587..b09cb78e84b 100644
--- a/reactos/ntoskrnl/io/iomgr/file.c
+++ b/reactos/ntoskrnl/io/iomgr/file.c
@@ -2488,14 +2488,64 @@ IoSetShareAccess(IN ACCESS_MASK DesiredAccess,
 }
 
 /*
- * @unimplemented
+ * @implemented
  */
 VOID
 NTAPI
 IoCancelFileOpen(IN PDEVICE_OBJECT DeviceObject,
                  IN PFILE_OBJECT FileObject)
 {
-    UNIMPLEMENTED;
+    PIRP Irp;
+    KEVENT Event;
+    NTSTATUS Status;
+    PIO_STACK_LOCATION Stack;
+
+    /* Check if handles were already created for the
+     * open file. If so, that's over.
+     */
+    if (FileObject->Flags & FO_HANDLE_CREATED)
+        KeBugCheckEx(INVALID_CANCEL_OF_FILE_OPEN,
+                     (ULONG_PTR)FileObject,
+                     (ULONG_PTR)DeviceObject, 0, 0);
+
+    /* Reset the events */
+    KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
+    KeClearEvent(&FileObject->Event);
+
+    /* Allocate the IRP we'll use */
+    Irp = IopAllocateIrpMustSucceed(DeviceObject->StackSize);
+    /* Properly set it */
+    Irp->Tail.Overlay.Thread = PsGetCurrentThread();
+    Irp->UserEvent = &Event;
+    Irp->UserIosb = &Irp->IoStatus;
+    Irp->Overlay.AsynchronousParameters.UserApcRoutine = NULL;
+    Irp->Tail.Overlay.OriginalFileObject = FileObject;
+    Irp->RequestorMode = KernelMode;
+    Irp->Flags = IRP_CLOSE_OPERATION | IRP_SYNCHRONOUS_API;
+
+    Stack = IoGetNextIrpStackLocation(Irp);
+    Stack->MajorFunction = IRP_MJ_CLEANUP;
+    Stack->FileObject = FileObject;
+
+    // FIXME: Put on top of IRPs list of the thread
+
+    /* Call the driver */
+    Status = IoCallDriver(DeviceObject, Irp);
+    if (Status == STATUS_PENDING)
+    {
+        KeWaitForSingleObject(&Event, UserRequest,
+                              KernelMode, FALSE, NULL);
+    }
+
+    // FIXME: Remove from IRPs list
+
+    /* Free the IRP */
+    IoFreeIrp(Irp);
+
+    /* Clear the event */
+    KeClearEvent(&FileObject->Event);
+    /* And finally, mark the open operation as canceled */
+    FileObject->Flags |= FO_FILE_OPEN_CANCELLED;
 }
 
 /*