2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

@@ -18,10 +18,11 @@
  *
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
 /*
  * This file contains the top half of the zfs directory structure
  * implementation. The bottom half is in zap_leaf.c.

@@ -944,10 +945,23 @@
 
 /*
  * Helper functions for consumers.
  */
 
+uint64_t
+zap_create_link(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj,
+    const char *name, dmu_tx_t *tx)
+{
+        uint64_t new_obj;
+
+        VERIFY((new_obj = zap_create(os, ot, DMU_OT_NONE, 0, tx)) > 0);
+        VERIFY(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj,
+            tx) == 0);
+
+        return (new_obj);
+}
+
 int
 zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask,
     char *name)
 {
         zap_cursor_t zc;