[ros-diffs] [hbirr] 19689: - Lock the MainResource if we overwrite or supersede an existing file.

- Lock the MainResource if we overwrite or supersede an existing file.  
- Use given allocation size, if we overwrite or supersede an existing
file.
Modified: trunk/reactos/drivers/fs/vfat/create.c
  _____

Modified: trunk/reactos/drivers/fs/vfat/create.c
--- trunk/reactos/drivers/fs/vfat/create.c	2005-11-27 15:37:06 UTC
(rev 19688)
+++ trunk/reactos/drivers/fs/vfat/create.c	2005-11-27 15:44:36 UTC
(rev 19689)
@@ -442,7 +442,6 @@

PVFATFCB ParentFcb;
    PWCHAR c, last;
    BOOLEAN PagingFileCreate = FALSE;
-	LARGE_INTEGER AllocationSize;
    BOOLEAN Dots;
    UNICODE_STRING FileNameU;
         UNICODE_STRING PathNameU;
@@ -565,9 +564,9 @@
    if (!NT_SUCCESS (Status))
    {
    	if (RequestedDisposition == FILE_CREATE ||
-			RequestedDisposition == FILE_OPEN_IF ||
-			RequestedDisposition == FILE_OVERWRITE_IF ||
-			RequestedDisposition == FILE_SUPERSEDE)
+		    RequestedDisposition == FILE_OPEN_IF ||
+		    RequestedDisposition == FILE_OVERWRITE_IF ||
+		    RequestedDisposition == FILE_SUPERSEDE)
    	{
    		ULONG Attributes;
    		Attributes =
Stack->Parameters.Create.FileAttributes;
@@ -586,7 +585,6 @@
    			}

Irp->IoStatus.Information =
FILE_CREATED;
-

VfatSetAllocationSizeInformation(FileObject,
    				pFcb,
    				DeviceExt,
@@ -691,13 +689,15 @@

if (RequestedDisposition == FILE_OVERWRITE ||
-			RequestedDisposition == FILE_OVERWRITE_IF)
+		    RequestedDisposition == FILE_OVERWRITE_IF ||
+		    RequestedDisposition == FILE_SUPERSEDE)
    	{
-			AllocationSize.QuadPart = 0;
+
ExAcquireResourceExclusiveLite(&(pFcb->MainResource), TRUE);
    		Status = VfatSetAllocationSizeInformation
(FileObject,
-				pFcb,
-				DeviceExt,
-				&AllocationSize);
+				                                   pFcb,
+
DeviceExt,
+
&Irp->Overlay.AllocationSize);
+                        ExReleaseResourceLite(&(pFcb->MainResource));
    		if (!NT_SUCCESS (Status))
    		{
    			VfatCloseFile (DeviceExt, FileObject);
@@ -705,15 +705,12 @@
    		}
    	}

-
-		/* Supersede the file */
    	if (RequestedDisposition == FILE_SUPERSEDE)
    	{
-			AllocationSize.QuadPart = 0;
-			VfatSetAllocationSizeInformation(FileObject,
pFcb, DeviceExt, &AllocationSize);
    		Irp->IoStatus.Information = FILE_SUPERSEDED;
    	}
-		else if (RequestedDisposition == FILE_OVERWRITE ||
RequestedDisposition == FILE_OVERWRITE_IF)
+		else if (RequestedDisposition == FILE_OVERWRITE || 
+		         RequestedDisposition == FILE_OVERWRITE_IF)
    	{
    		Irp->IoStatus.Information = FILE_OVERWRITTEN;
    	}