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diff --git a/subversion/libsvn_fs_x/hotcopy.h b/subversion/libsvn_fs_x/hotcopy.h
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+++ b/subversion/libsvn_fs_x/hotcopy.h
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+/* hotcopy.h : interface to the native filesystem layer
+ *
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ */
+
+#ifndef SVN_LIBSVN_FS__HOTCOPY_H
+#define SVN_LIBSVN_FS__HOTCOPY_H
+
+#include "fs.h"
+
+/* Create an empty copy of the fsfs filesystem SRC_FS into a new DST_FS at
+ * DST_PATH.  If INCREMENTAL is TRUE, perform a few pre-checks only if
+ * a repo already exists at DST_PATH.
+ * Use SCRATCH_POOL for temporary allocations. */
+svn_error_t *
+svn_fs_x__hotcopy_prepare_target(svn_fs_t *src_fs,
+                                 svn_fs_t *dst_fs,
+                                 const char *dst_path,
+                                 svn_boolean_t incremental,
+                                 apr_pool_t *scratch_pool);
+
+/* Copy the fsfs filesystem SRC_FS into DST_FS. If INCREMENTAL is TRUE, do
+ * not re-copy data which already exists in DST_FS.  Indicate progress via
+ * the optional NOTIFY_FUNC callback using NOTIFY_BATON.
+ * Use SCRATCH_POOL for temporary allocations. */
+svn_error_t *
+svn_fs_x__hotcopy(svn_fs_t *src_fs,
+                  svn_fs_t *dst_fs,
+                  svn_boolean_t incremental,
+                  svn_fs_hotcopy_notify_t notify_func,
+                  void *notify_baton,
+                  svn_cancel_func_t cancel_func,
+                  void *cancel_baton,
+                  apr_pool_t *scratch_pool);
+
+#endif