diff --git a/src/sys/create.c b/src/sys/create.c
index 42549f12..f506723e 100644
--- a/src/sys/create.c
+++ b/src/sys/create.c
@@ -373,8 +373,8 @@ NTSTATUS FspFsvolCreatePrepare(
         FileNode = FspIopRequestContext(Request, RequestFileNode);
         FileObject = FspIopRequestContext(Request, RequestFileObject);
 
-        /* lock the FileNode for Paging IO */
-        Success = FspFileNodePgioTryAcquireExclusive(FileNode);
+        /* lock the FileNode for overwriting */
+        Success = FspFileNodeTryAcquireExclusive(FileNode, Both);
         if (!Success)
         {
             /* repost the IRP to retry later */
@@ -392,7 +392,7 @@ NTSTATUS FspFsvolCreatePrepare(
         Success = MmCanFileBeTruncated(&FileNode->NonPaged->SectionObjectPointers, &Zero);
         if (!Success)
         {
-            FspFileNodePgioRelease(FileNode);
+            FspFileNodeRelease(FileNode, Both);
 
             FspFsvolCreatePostClose(FileNode, (UINT_PTR)FileObject->FsContext2);
             FspFileNodeClose(FileNode, FileObject, 0);
@@ -612,7 +612,7 @@ VOID FspFsvolCreateComplete(
         /* did the user-mode file system sent us a failure code? */
         if (!NT_SUCCESS(Response->IoStatus.Status))
         {
-            FspFileNodePgioRelease(FileNode);
+            FspFileNodeRelease(FileNode, Both);
 
             FspFileNodeClose(FileNode, FileObject, 0);
 
@@ -626,7 +626,7 @@ VOID FspFsvolCreateComplete(
         FileNode->Header.FileSize.QuadPart = Response->Rsp.Overwrite.FileSize;
         CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&FileNode->Header.AllocationSize);
 
-        FspFileNodePgioRelease(FileNode);
+        FspFileNodeRelease(FileNode, Both);
 
         /* SUCCESS! */
         FspIopRequestContext(Request, RequestFileNode) = 0;
diff --git a/src/sys/driver.h b/src/sys/driver.h
index 63dcab26..1bba4ca9 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -505,13 +505,19 @@ NTSTATUS FspVolumeWork(
     PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 
 /* file objects */
-#define FspFileNodeKind(FileNode)   \
+#define FspFileNodeKind(FileNode)       \
     (((FSP_FILE_NODE *)FileNode)->Header.NodeTypeCode)
-#define FspFileNodeIsValid(FileNode)\
+#define FspFileNodeIsValid(FileNode)    \
     (0 != (FileNode) && FspFileNodeFileKind == ((FSP_FILE_NODE *)FileNode)->Header.NodeTypeCode)
 enum
 {
-    FspFileNodeFileKind = 'BZ',
+    FspFileNodeFileKind                 = 'BZ',
+};
+enum
+{
+    FspFileNodeAcquireMain              = 1,
+    FspFileNodeAcquirePgio              = 2,
+    FspFileNodeAcquireBoth              = 3,
 };
 typedef struct
 {
@@ -544,10 +550,6 @@ typedef struct
 NTSTATUS FspFileNodeCreate(PDEVICE_OBJECT DeviceObject,
     ULONG ExtraSize, FSP_FILE_NODE **PFileNode);
 VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode);
-FSP_FILE_NODE *FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
-    DWORD GrantedAccess, DWORD ShareAccess, BOOLEAN DeleteOnClose, NTSTATUS *PResult);
-VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
-    PBOOLEAN PDeletePending);
 static inline
 VOID FspFileNodeReference(FSP_FILE_NODE *FileNode)
 {
@@ -560,56 +562,20 @@ VOID FspFileNodeDereference(FSP_FILE_NODE *FileNode)
     if (0 == RefCount)
         FspFileNodeDelete(FileNode);
 }
-static inline
-VOID FspFileNodeAcquireShared(FSP_FILE_NODE *FileNode)
-{
-    ExAcquireResourceSharedLite(FileNode->Header.Resource, TRUE);
-}
-static inline
-BOOLEAN FspFileNodeTryAcquireShared(FSP_FILE_NODE *FileNode)
-{
-    return ExAcquireResourceSharedLite(FileNode->Header.Resource, FALSE);
-}
-static inline
-VOID FspFileNodeAcquireExclusive(FSP_FILE_NODE *FileNode)
-{
-    ExAcquireResourceExclusiveLite(FileNode->Header.Resource, TRUE);
-}
-static inline
-BOOLEAN FspFileNodeTryAcquireExclusive(FSP_FILE_NODE *FileNode)
-{
-    return ExAcquireResourceExclusiveLite(FileNode->Header.Resource, FALSE);
-}
-static inline
-VOID FspFileNodeRelease(FSP_FILE_NODE *FileNode)
-{
-    ExReleaseResourceLite(FileNode->Header.Resource);
-}
-static inline
-VOID FspFileNodePgioAcquireShared(FSP_FILE_NODE *FileNode)
-{
-    ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, TRUE);
-}
-static inline
-BOOLEAN FspFileNodePgioTryAcquireShared(FSP_FILE_NODE *FileNode)
-{
-    return ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, FALSE);
-}
-static inline
-VOID FspFileNodePgioAcquireExclusive(FSP_FILE_NODE *FileNode)
-{
-    ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, TRUE);
-}
-static inline
-BOOLEAN FspFileNodePgioTryAcquireExclusive(FSP_FILE_NODE *FileNode)
-{
-    return ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, FALSE);
-}
-static inline
-VOID FspFileNodePgioRelease(FSP_FILE_NODE *FileNode)
-{
-    ExReleaseResourceLite(FileNode->Header.PagingIoResource);
-}
+VOID FspFileNodeAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags);
+BOOLEAN FspFileNodeTryAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags);
+VOID FspFileNodeAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags);
+BOOLEAN FspFileNodeTryAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags);
+VOID FspFileNodeRelease(FSP_FILE_NODE *FileNode, ULONG Flags);
+FSP_FILE_NODE *FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
+    DWORD GrantedAccess, DWORD ShareAccess, BOOLEAN DeleteOnClose, NTSTATUS *PResult);
+VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
+    PBOOLEAN PDeletePending);
+#define FspFileNodeAcquireShared(N,F)   FspFileNodeAcquireShared(N, FspFileNodeAcquire ## F)
+#define FspFileNodeTryAcquireShared(N,F)    FspFileNodeTryAcquireShared(N, FspFileNodeAcquire ## F)
+#define FspFileNodeAcquireExclusive(N,F)    FspFileNodeAcquireExclusive(N, FspFileNodeAcquire ## F)
+#define FspFileNodeTryAcquireExclusive(N,F) FspFileNodeTryAcquireExclusive(N, FspFileNodeAcquire ## F)
+#define FspFileNodeRelease(N,F)         FspFileNodeRelease(N, FspFileNodeAcquire ## F)
 
 /* debug */
 #if DBG
diff --git a/src/sys/node.c b/src/sys/node.c
index d1b59b8c..0e375916 100644
--- a/src/sys/node.c
+++ b/src/sys/node.c
@@ -6,9 +6,20 @@
 
 #include <sys/driver.h>
 
+#undef FspFileNodeAcquireShared
+#undef FspFileNodeTryAcquireShared
+#undef FspFileNodeAcquireExclusive
+#undef FspFileNodeTryAcquireExclusive
+#undef FspFileNodeRelease
+
 NTSTATUS FspFileNodeCreate(PDEVICE_OBJECT DeviceObject,
     ULONG ExtraSize, FSP_FILE_NODE **PFileNode);
 VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode);
+VOID FspFileNodeAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags);
+BOOLEAN FspFileNodeTryAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags);
+VOID FspFileNodeAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags);
+BOOLEAN FspFileNodeTryAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags);
+VOID FspFileNodeRelease(FSP_FILE_NODE *FileNode, ULONG Flags);
 FSP_FILE_NODE *FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
     DWORD GrantedAccess, DWORD ShareAccess, BOOLEAN DeleteOnClose, NTSTATUS *PResult);
 VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
@@ -17,6 +28,11 @@ VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
 #ifdef ALLOC_PRAGMA
 #pragma alloc_text(PAGE, FspFileNodeCreate)
 #pragma alloc_text(PAGE, FspFileNodeDelete)
+#pragma alloc_text(PAGE, FspFileNodeAcquireShared)
+#pragma alloc_text(PAGE, FspFileNodeTryAcquireShared)
+#pragma alloc_text(PAGE, FspFileNodeAcquireExclusive)
+#pragma alloc_text(PAGE, FspFileNodeTryAcquireExclusive)
+#pragma alloc_text(PAGE, FspFileNodeRelease)
 #pragma alloc_text(PAGE, FspFileNodeOpen)
 #pragma alloc_text(PAGE, FspFileNodeClose)
 #endif
@@ -79,6 +95,93 @@ VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode)
     FspFree(FileNode);
 }
 
+VOID FspFileNodeAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags)
+{
+    PAGED_CODE();
+
+    if (Flags & FspFileNodeAcquireMain)
+        ExAcquireResourceSharedLite(FileNode->Header.Resource, TRUE);
+
+    if (Flags & FspFileNodeAcquirePgio)
+        ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, TRUE);
+}
+
+BOOLEAN FspFileNodeTryAcquireShared(FSP_FILE_NODE *FileNode, ULONG Flags)
+{
+    PAGED_CODE();
+
+    BOOLEAN Result = FALSE;
+
+    if (Flags & FspFileNodeAcquireMain)
+    {
+        Result = ExAcquireResourceSharedLite(FileNode->Header.Resource, FALSE);
+        if (!Result)
+            return FALSE;
+    }
+
+    if (Flags & FspFileNodeAcquirePgio)
+    {
+        Result = ExAcquireResourceSharedLite(FileNode->Header.PagingIoResource, FALSE);
+        if (!Result)
+        {
+            if (Flags & FspFileNodeAcquireMain)
+                ExReleaseResourceLite(FileNode->Header.Resource);
+            return FALSE;
+        }
+    }
+
+    return Result;
+}
+
+VOID FspFileNodeAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags)
+{
+    PAGED_CODE();
+
+    if (Flags & FspFileNodeAcquireMain)
+        ExAcquireResourceExclusiveLite(FileNode->Header.Resource, TRUE);
+
+    if (Flags & FspFileNodeAcquirePgio)
+        ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, TRUE);
+}
+
+BOOLEAN FspFileNodeTryAcquireExclusive(FSP_FILE_NODE *FileNode, ULONG Flags)
+{
+    PAGED_CODE();
+
+    BOOLEAN Result = FALSE;
+
+    if (Flags & FspFileNodeAcquireMain)
+    {
+        Result = ExAcquireResourceExclusiveLite(FileNode->Header.Resource, FALSE);
+        if (!Result)
+            return FALSE;
+    }
+
+    if (Flags & FspFileNodeAcquirePgio)
+    {
+        Result = ExAcquireResourceExclusiveLite(FileNode->Header.PagingIoResource, FALSE);
+        if (!Result)
+        {
+            if (Flags & FspFileNodeAcquireMain)
+                ExReleaseResourceLite(FileNode->Header.Resource);
+            return FALSE;
+        }
+    }
+
+    return Result;
+}
+
+VOID FspFileNodeRelease(FSP_FILE_NODE *FileNode, ULONG Flags)
+{
+    PAGED_CODE();
+
+    if (Flags & FspFileNodeAcquirePgio)
+        ExReleaseResourceLite(FileNode->Header.PagingIoResource);
+
+    if (Flags & FspFileNodeAcquireMain)
+        ExReleaseResourceLite(FileNode->Header.Resource);
+}
+
 FSP_FILE_NODE *FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
     DWORD GrantedAccess, DWORD ShareAccess, BOOLEAN DeleteOnClose, NTSTATUS *PResult)
 {