diff --git a/reactos/include/ddk/fsfuncs.h b/reactos/include/ddk/fsfuncs.h
index 72434d5bc4d..51adca6cfa5 100644
--- a/reactos/include/ddk/fsfuncs.h
+++ b/reactos/include/ddk/fsfuncs.h
@@ -1,8 +1,23 @@
 #ifndef __INCLUDE_DDK_FSFUNCS_H
 #define __INCLUDE_DDK_FSFUNCS_H
-/* $Id: fsfuncs.h,v 1.16 2002/09/08 10:47:44 chorns Exp $ */
+/* $Id: fsfuncs.h,v 1.17 2002/11/07 02:44:49 robd Exp $ */
 #define FlagOn(x,f) ((x) & (f))
 
+VOID
+STDCALL
+FsRtlFreeFileLock(
+	IN PFILE_LOCK FileLock
+	);
+
+PFILE_LOCK
+STDCALL
+FsRtlAllocateFileLock (
+    IN PCOMPLETE_LOCK_IRP_ROUTINE   CompleteLockIrpRoutine OPTIONAL,
+    IN PUNLOCK_ROUTINE              UnlockRoutine OPTIONAL
+    );
+
+#define FsRtlAreThereCurrentFileLocks(FL) (((FL)->FastIoIsQuestionable))
+
 BOOLEAN STDCALL
 FsRtlAddLargeMcbEntry(IN PLARGE_MCB Mcb,
 		      IN LONGLONG Vbn,
diff --git a/reactos/include/ddk/fstypes.h b/reactos/include/ddk/fstypes.h
index 0bc69931523..5b9c0f90ede 100644
--- a/reactos/include/ddk/fstypes.h
+++ b/reactos/include/ddk/fstypes.h
@@ -1,6 +1,6 @@
 #ifndef __INCLUDE_DDK_FSTYPES_H
 #define __INCLUDE_DDK_FSTYPES_H
-/* $Id: fstypes.h,v 1.7 2002/09/08 10:47:44 chorns Exp $ */
+/* $Id: fstypes.h,v 1.8 2002/11/07 02:44:49 robd Exp $ */
 
 #define FSRTL_TAG 	TAG('F','S','r','t')
 
@@ -14,6 +14,23 @@ typedef struct _FILE_LOCK_INFO {
     LARGE_INTEGER   EndingByte;
 } FILE_LOCK_INFO, *PFILE_LOCK_INFO;
 
+typedef struct _FILE_LOCK_TOC {
+	KSPIN_LOCK			SpinLock;
+	LIST_ENTRY			GrantedListHead;
+	LIST_ENTRY			PendingListHead;
+} FILE_LOCK_TOC, *PFILE_LOCK_TOC;
+
+typedef struct _FILE_LOCK_GRANTED {
+	LIST_ENTRY			ListEntry;
+	FILE_LOCK_INFO		Lock;
+} FILE_LOCK_GRANTED, *PFILE_LOCK_GRANTED;
+
+typedef struct _FILE_LOCK_PENDING {
+	LIST_ENTRY			ListEntry;
+	PIRP				Irp;
+	PVOID				Context;
+} FILE_LOCK_PENDING, *PFILE_LOCK_PENDING;
+
 // raw internal file lock struct returned from FsRtlGetNextFileLock
 typedef struct _FILE_SHARED_LOCK_ENTRY {
     PVOID           Unknown1;
diff --git a/reactos/include/ddk/iodef.h b/reactos/include/ddk/iodef.h
index 4d199cd27a8..4d0b4e967d4 100644
--- a/reactos/include/ddk/iodef.h
+++ b/reactos/include/ddk/iodef.h
@@ -248,6 +248,14 @@ enum
 
 #define IRP_MJ_SCSI  IRP_MJ_INTERNAL_DEVICE_CONTROL
 
+/*
+ * Minor function numbers for IRP_MJ_LOCK_CONTROL
+ */
+#define IRP_MN_LOCK                     0x01
+#define IRP_MN_UNLOCK_SINGLE            0x02
+#define IRP_MN_UNLOCK_ALL               0x03
+#define IRP_MN_UNLOCK_ALL_BY_KEY        0x04
+
 /*
  * Minor function numbers for IRP_MJ_FILE_SYSTEM_CONTROL
  */
diff --git a/reactos/include/ddk/iotypes.h b/reactos/include/ddk/iotypes.h
index 5cff95c9796..1426a4ec44a 100644
--- a/reactos/include/ddk/iotypes.h
+++ b/reactos/include/ddk/iotypes.h
@@ -1,4 +1,4 @@
-/* $Id: iotypes.h,v 1.43 2002/10/05 10:53:36 dwelch Exp $
+/* $Id: iotypes.h,v 1.44 2002/11/07 02:44:49 robd Exp $
  *
  */
 
@@ -432,6 +432,14 @@ typedef struct __attribute__((packed)) _IO_STACK_LOCATION
 	  struct _SCSI_REQUEST_BLOCK *Srb;
 	} Scsi;
 
+	  //byte range file locking
+	  struct 
+	{
+      PLARGE_INTEGER Length;
+      ULONG Key;
+      LARGE_INTEGER ByteOffset;
+    } LockControl;
+
       /* Paramters for other calls */
       struct
 	{
diff --git a/reactos/include/ntos/heap.h b/reactos/include/ntos/heap.h
index 5efac191de1..391d638d572 100644
--- a/reactos/include/ntos/heap.h
+++ b/reactos/include/ntos/heap.h
@@ -18,7 +18,7 @@
 #define HEAP_NO_SERIALIZE	(1)
 #define HEAP_ZERO_MEMORY	(8)
 #define HEAP_REALLOC_IN_PLACE_ONLY	(16)
-#define HEAP_GROWABLE (32)
+#define HEAP_GROWABLE (2)
 #define HEAP_NO_VALLOC (64)
 
 #endif /* __INCLUDE_HEAP_H */