4012 Upper limit of zfs set bounds check for refreservation on volumes is too low

@@ -23,10 +23,11 @@
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
  * Copyright (c) 2012 by Delphix. All rights reserved.
  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  * Copyright (c) 2013 Steven Hartland. All rights reserved.
+ * Copyright 2013 DEY Storage Systems, Inc.
  */
 
 #ifndef _LIBZFS_H
 #define _LIBZFS_H
 

@@ -598,10 +599,12 @@
     boolean_t, int);
 extern int zfs_hold_nvl(zfs_handle_t *, int, nvlist_t *);
 extern int zfs_release(zfs_handle_t *, const char *, const char *, boolean_t);
 extern int zfs_get_holds(zfs_handle_t *, nvlist_t **);
 extern uint64_t zvol_volsize_to_reservation(uint64_t, nvlist_t *);
+extern uint64_t zvol_volsize_to_reservation_impl(uint64_t volsize,
+    uint64_t volblocksize, int ncopies);
 
 typedef int (*zfs_userspace_cb_t)(void *arg, const char *domain,
     uid_t rid, uint64_t space);
 
 extern int zfs_userspace(zfs_handle_t *, zfs_userquota_prop_t,