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Posted to commits@subversion.apache.org by st...@apache.org on 2013/06/30 19:01:17 UTC

svn commit: r1498157 [2/11] - in /subversion/branches/fsfs-format7/subversion: libsvn_fs_x/ tests/libsvn_fs_x/

Modified: subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.c
URL: http://svn.apache.org/viewvc/subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.c?rev=1498157&r1=1498156&r2=1498157&view=diff
==============================================================================
--- subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.c (original)
+++ subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.c Sun Jun 30 17:01:16 2013
@@ -77,16 +77,16 @@ typedef struct binary_change_t
 
   /* Relevant parts of the node revision ID of the change.
    * Empty, if REV_ID is not "used". */
-  svn_fs_fs__id_part_t node_id;
-  svn_fs_fs__id_part_t copy_id;
-  svn_fs_fs__id_part_t rev_id;  /* txn ID if CHANGE_TXN_NODE set in FLAGS */
+  svn_fs_x__id_part_t node_id;
+  svn_fs_x__id_part_t copy_id;
+  svn_fs_x__id_part_t rev_id;  /* txn ID if CHANGE_TXN_NODE set in FLAGS */
 
 } binary_change_t;
 
 /* The actual container object.  Change lists are concatenated into CHANGES
  * and and their begins and ends are stored in OFFSETS.
  */
-struct svn_fs_fs__changes_t
+struct svn_fs_x__changes_t
 {
   /* The paths - either in 'builder' mode or finalized mode.
    * The respective other pointer will be NULL. */
@@ -106,11 +106,11 @@ struct svn_fs_fs__changes_t
  * and initial capacity of INITIAL_COUNT changes.  The PATH and BUILDER
  * members must be initialized by the caller afterwards.
  */
-static svn_fs_fs__changes_t *
+static svn_fs_x__changes_t *
 changes_create_body(apr_size_t initial_count,
                     apr_pool_t *pool)
 {
-  svn_fs_fs__changes_t *changes = apr_pcalloc(pool, sizeof(*changes));
+  svn_fs_x__changes_t *changes = apr_pcalloc(pool, sizeof(*changes));
 
   changes->changes = apr_array_make(pool, (int)initial_count,
                                     sizeof(binary_change_t));
@@ -120,12 +120,12 @@ changes_create_body(apr_size_t initial_c
   return changes;
 }
 
-svn_fs_fs__changes_t *
-svn_fs_fs__changes_create(apr_size_t initial_count,
-                          apr_pool_t *pool)
+svn_fs_x__changes_t *
+svn_fs_x__changes_create(apr_size_t initial_count,
+                         apr_pool_t *pool)
 {
-  svn_fs_fs__changes_t *changes = changes_create_body(initial_count, pool);
-  changes->builder = svn_fs_fs__string_table_builder_create(pool);
+  svn_fs_x__changes_t *changes = changes_create_body(initial_count, pool);
+  changes->builder = svn_fs_x__string_table_builder_create(pool);
 
   return changes;
 }
@@ -133,7 +133,7 @@ svn_fs_fs__changes_create(apr_size_t ini
 /* Add CHANGE to the latest change list in CHANGES.
  */
 static svn_error_t *
-append_change(svn_fs_fs__changes_t *changes,
+append_change(svn_fs_x__changes_t *changes,
               change_t *change)
 {
   binary_change_t binary_change = { 0 };
@@ -146,7 +146,7 @@ append_change(svn_fs_fs__changes_t *chan
 
   /* define the kind of change and what specific information is present */
   info = &change->info;
-  is_txn_id = info->node_rev_id && svn_fs_fs__id_is_txn(info->node_rev_id);
+  is_txn_id = info->node_rev_id && svn_fs_x__id_is_txn(info->node_rev_id);
   binary_change.flags = (info->text_mod ? CHANGE_TEXT_MOD : 0)
                       | (info->prop_mod ? CHANGE_PROP_MOD : 0)
                       | (is_txn_id ? CHANGE_TXN_NODE : 0)
@@ -155,18 +155,18 @@ append_change(svn_fs_fs__changes_t *chan
 
   /* Path of the change. */
   binary_change.path
-    = svn_fs_fs__string_table_builder_add(changes->builder,
-                                          change->path.data,
-                                          change->path.len);
+    = svn_fs_x__string_table_builder_add(changes->builder,
+                                         change->path.data,
+                                         change->path.len);
 
   /* copy-from information, if presence is indicated by FLAGS */
   if (SVN_IS_VALID_REVNUM(info->copyfrom_rev))
     {
       binary_change.copyfrom_rev = info->copyfrom_rev;
       binary_change.copyfrom_path
-        = svn_fs_fs__string_table_builder_add(changes->builder,
-                                              info->copyfrom_path,
-                                              0);
+        = svn_fs_x__string_table_builder_add(changes->builder,
+                                             info->copyfrom_path,
+                                             0);
     }
   else
     {
@@ -177,26 +177,26 @@ append_change(svn_fs_fs__changes_t *chan
   /* Relevant parts of the revision ID of the change. */
   if (info->node_rev_id)
     {
-      binary_change.node_id = *svn_fs_fs__id_node_id(info->node_rev_id);
-      binary_change.copy_id = *svn_fs_fs__id_copy_id(info->node_rev_id);
+      binary_change.node_id = *svn_fs_x__id_node_id(info->node_rev_id);
+      binary_change.copy_id = *svn_fs_x__id_copy_id(info->node_rev_id);
       binary_change.rev_id = is_txn_id
-                           ? *svn_fs_fs__id_txn_id(info->node_rev_id)
-                           : *svn_fs_fs__id_rev_item(info->node_rev_id);
+                           ? *svn_fs_x__id_txn_id(info->node_rev_id)
+                           : *svn_fs_x__id_rev_item(info->node_rev_id);
     }
   else
     {
-      svn_fs_fs__id_txn_reset(&binary_change.rev_id);
+      svn_fs_x__id_txn_reset(&binary_change.rev_id);
     }
-  
+
   APR_ARRAY_PUSH(changes->changes, binary_change_t) = binary_change;
 
   return SVN_NO_ERROR;
 }
 
 svn_error_t *
-svn_fs_fs__changes_append_list(apr_size_t *list_index,
-                               svn_fs_fs__changes_t *changes,
-                               apr_array_header_t *list)
+svn_fs_x__changes_append_list(apr_size_t *list_index,
+                              svn_fs_x__changes_t *changes,
+                              apr_array_header_t *list)
 {
   int i;
   
@@ -216,7 +216,7 @@ svn_fs_fs__changes_append_list(apr_size_
 }
 
 apr_size_t
-svn_fs_fs__changes_estimate_size(const svn_fs_fs__changes_t *changes)
+svn_fs_x__changes_estimate_size(const svn_fs_x__changes_t *changes)
 {
   /* CHANGES must be in 'builder' mode */
   if (changes->builder == NULL)
@@ -225,16 +225,16 @@ svn_fs_fs__changes_estimate_size(const s
   /* string table code makes its own prediction,
    * changes should be < 10 bytes each,
    * some static overhead should be assumed */
-  return svn_fs_fs__string_table_builder_estimate_size(changes->builder)
+  return svn_fs_x__string_table_builder_estimate_size(changes->builder)
        + changes->changes->nelts * 10
        + 100;
 }
 
 svn_error_t *
-svn_fs_fs__changes_get_list(apr_array_header_t **list,
-                            const svn_fs_fs__changes_t *changes,
-                            apr_size_t idx,
-                            apr_pool_t *pool)
+svn_fs_x__changes_get_list(apr_array_header_t **list,
+                           const svn_fs_x__changes_t *changes,
+                           apr_size_t idx,
+                           apr_pool_t *pool)
 {
   int first;
   int last;
@@ -265,22 +265,22 @@ svn_fs_fs__changes_get_list(apr_array_he
       /* convert BINARY_CHANGE into a standard FSFS change_t */
       change_t *change = apr_pcalloc(pool, sizeof(*change));
       svn_fs_path_change2_t *info = &change->info;
-      change->path.data = svn_fs_fs__string_table_get(changes->paths,
-                                                      binary_change->path,
-                                                      &change->path.len,
-                                                      pool);
+      change->path.data = svn_fs_x__string_table_get(changes->paths,
+                                                     binary_change->path,
+                                                     &change->path.len,
+                                                     pool);
 
-      if (svn_fs_fs__id_txn_used(&binary_change->rev_id))
+      if (svn_fs_x__id_txn_used(&binary_change->rev_id))
         info->node_rev_id
           = (binary_change->flags & CHANGE_TXN_NODE)
-          ? svn_fs_fs__id_txn_create(&binary_change->node_id,
-                                     &binary_change->copy_id,
-                                     &binary_change->rev_id,
-                                     pool)
-          : svn_fs_fs__id_rev_create(&binary_change->node_id,
-                                     &binary_change->copy_id,
-                                     &binary_change->rev_id,
-                                     pool);
+          ? svn_fs_x__id_txn_create(&binary_change->node_id,
+                                    &binary_change->copy_id,
+                                    &binary_change->rev_id,
+                                    pool)
+          : svn_fs_x__id_rev_create(&binary_change->node_id,
+                                    &binary_change->copy_id,
+                                    &binary_change->rev_id,
+                                    pool);
 
       info->change_kind = (svn_fs_path_change_kind_t)
         ((binary_change->flags & CHANGE_KIND_MASK) >> CHANGE_KIND_SHIFT);
@@ -293,7 +293,7 @@ svn_fs_fs__changes_get_list(apr_array_he
       info->copyfrom_known = TRUE;
       if (SVN_IS_VALID_REVNUM(binary_change->copyfrom_rev))
         info->copyfrom_path 
-          = svn_fs_fs__string_table_get(changes->paths,
+          = svn_fs_x__string_table_get(changes->paths,
                                         binary_change->copyfrom_path,
                                         NULL,
                                         pool);
@@ -306,16 +306,16 @@ svn_fs_fs__changes_get_list(apr_array_he
 }
 
 svn_error_t *
-svn_fs_fs__write_changes_container(svn_stream_t *stream,
-                                   const svn_fs_fs__changes_t *changes,
-                                   apr_pool_t *pool)
+svn_fs_x__write_changes_container(svn_stream_t *stream,
+                                  const svn_fs_x__changes_t *changes,
+                                  apr_pool_t *pool)
 {
   int i;
 
   string_table_t *paths = changes->paths
                         ? changes->paths
-                        : svn_fs_fs__string_table_create(changes->builder,
-                                                         pool);
+                        : svn_fs_x__string_table_create(changes->builder,
+                                                        pool);
 
   svn_packed__data_root_t *root = svn_packed__data_create_root(pool);
 
@@ -364,30 +364,30 @@ svn_fs_fs__write_changes_container(svn_s
     }
 
   /* write to disk */
-  SVN_ERR(svn_fs_fs__write_string_table(stream, paths, pool));
+  SVN_ERR(svn_fs_x__write_string_table(stream, paths, pool));
   SVN_ERR(svn_packed__data_write(stream, root, pool));
   
   return SVN_NO_ERROR;
 }
 
 svn_error_t *
-svn_fs_fs__read_changes_container(svn_fs_fs__changes_t **changes_p,
-                                  svn_stream_t *stream,
-                                  apr_pool_t *result_pool,
-                                  apr_pool_t *scratch_pool)
+svn_fs_x__read_changes_container(svn_fs_x__changes_t **changes_p,
+                                 svn_stream_t *stream,
+                                 apr_pool_t *result_pool,
+                                 apr_pool_t *scratch_pool)
 {
   apr_size_t i;
   apr_size_t count;
 
-  svn_fs_fs__changes_t *changes = apr_pcalloc(result_pool, sizeof(*changes));
+  svn_fs_x__changes_t *changes = apr_pcalloc(result_pool, sizeof(*changes));
 
   svn_packed__data_root_t *root;
   svn_packed__int_stream_t *offsets_stream;
   svn_packed__int_stream_t *changes_stream;
 
   /* read from disk */
-  SVN_ERR(svn_fs_fs__read_string_table(&changes->paths, stream,
-                                       result_pool, scratch_pool));
+  SVN_ERR(svn_fs_x__read_string_table(&changes->paths, stream,
+                                      result_pool, scratch_pool));
 
   SVN_ERR(svn_packed__data_read(&root, stream, result_pool, scratch_pool));
   offsets_stream = svn_packed__first_int_stream(root);
@@ -431,12 +431,12 @@ svn_fs_fs__read_changes_container(svn_fs
 }
 
 svn_error_t *
-svn_fs_fs__serialize_changes_container(void **data,
-                                       apr_size_t *data_len,
-                                       void *in,
-                                       apr_pool_t *pool)
+svn_fs_x__serialize_changes_container(void **data,
+                                      apr_size_t *data_len,
+                                      void *in,
+                                      apr_pool_t *pool)
 {
-  svn_fs_fs__changes_t *changes = in;
+  svn_fs_x__changes_t *changes = in;
   svn_stringbuf_t *serialized;
 
   /* make a guesstimate on the size of the serialized data.  Erring on the
@@ -452,9 +452,9 @@ svn_fs_fs__serialize_changes_container(v
     = svn_temp_serializer__init(changes, sizeof(*changes), size, pool);
 
   /* serialize sub-structures */
-  svn_fs_fs__serialize_string_table(context, &changes->paths);
-  svn_fs_fs__serialize_apr_array(context, &changes->changes);
-  svn_fs_fs__serialize_apr_array(context, &changes->offsets);
+  svn_fs_x__serialize_string_table(context, &changes->paths);
+  svn_fs_x__serialize_apr_array(context, &changes->changes);
+  svn_fs_x__serialize_apr_array(context, &changes->offsets);
 
   /* return the serialized result */
   serialized = svn_temp_serializer__get(context);
@@ -466,17 +466,17 @@ svn_fs_fs__serialize_changes_container(v
 }
 
 svn_error_t *
-svn_fs_fs__deserialize_changes_container(void **out,
+svn_fs_x__deserialize_changes_container(void **out,
                                          void *data,
                                          apr_size_t data_len,
                                          apr_pool_t *pool)
 {
-  svn_fs_fs__changes_t *changes = (svn_fs_fs__changes_t *)data;
+  svn_fs_x__changes_t *changes = (svn_fs_x__changes_t *)data;
 
   /* de-serialize sub-structures */
-  svn_fs_fs__deserialize_string_table(changes, &changes->paths);
-  svn_fs_fs__deserialize_apr_array(changes, &changes->changes, pool);
-  svn_fs_fs__deserialize_apr_array(changes, &changes->offsets, pool);
+  svn_fs_x__deserialize_string_table(changes, &changes->paths);
+  svn_fs_x__deserialize_apr_array(changes, &changes->changes, pool);
+  svn_fs_x__deserialize_apr_array(changes, &changes->offsets, pool);
 
   /* done */
   *out = changes;
@@ -485,11 +485,11 @@ svn_fs_fs__deserialize_changes_container
 }
 
 svn_error_t *
-svn_fs_fs__changes_get_list_func(void **out,
-                                 const void *data,
-                                 apr_size_t data_len,
-                                 void *baton,
-                                 apr_pool_t *pool)
+svn_fs_x__changes_get_list_func(void **out,
+                                const void *data,
+                                apr_size_t data_len,
+                                void *baton,
+                                apr_pool_t *pool)
 {
   int first;
   int last;
@@ -497,7 +497,7 @@ svn_fs_fs__changes_get_list_func(void **
   apr_array_header_t *list;
 
   apr_uint32_t idx = *(apr_uint32_t *)baton;
-  const svn_fs_fs__changes_t *container = data;
+  const svn_fs_x__changes_t *container = data;
 
   /* resolve all the sub-container pointers we need */
   const string_table_t *paths
@@ -538,20 +538,20 @@ svn_fs_fs__changes_get_list_func(void **
       change_t *change = apr_pcalloc(pool, sizeof(*change));
       svn_fs_path_change2_t *info = &change->info;
       change->path.data
-        = svn_fs_fs__string_table_get_func(paths, binary_change->path,
-                                           &change->path.len, pool);
+        = svn_fs_x__string_table_get_func(paths, binary_change->path,
+                                          &change->path.len, pool);
 
-      if (svn_fs_fs__id_txn_used(&binary_change->rev_id))
+      if (svn_fs_x__id_txn_used(&binary_change->rev_id))
         info->node_rev_id
           = (binary_change->flags & CHANGE_TXN_NODE)
-          ? svn_fs_fs__id_txn_create(&binary_change->node_id,
-                                     &binary_change->copy_id,
-                                     &binary_change->rev_id,
-                                     pool)
-          : svn_fs_fs__id_rev_create(&binary_change->node_id,
-                                     &binary_change->copy_id,
-                                     &binary_change->rev_id,
-                                     pool);
+          ? svn_fs_x__id_txn_create(&binary_change->node_id,
+                                    &binary_change->copy_id,
+                                    &binary_change->rev_id,
+                                    pool)
+          : svn_fs_x__id_rev_create(&binary_change->node_id,
+                                    &binary_change->copy_id,
+                                    &binary_change->rev_id,
+                                    pool);
 
       info->change_kind = (svn_fs_path_change_kind_t)
         ((binary_change->flags & CHANGE_KIND_MASK) >> CHANGE_KIND_SHIFT);
@@ -564,10 +564,10 @@ svn_fs_fs__changes_get_list_func(void **
       info->copyfrom_known = TRUE;
       if (SVN_IS_VALID_REVNUM(binary_change->copyfrom_rev))
         info->copyfrom_path 
-          = svn_fs_fs__string_table_get_func(paths,
-                                             binary_change->copyfrom_path,
-                                             NULL,
-                                             pool);
+          = svn_fs_x__string_table_get_func(paths,
+                                            binary_change->copyfrom_path,
+                                            NULL,
+                                            pool);
 
       /* add it to the result */
       APR_ARRAY_PUSH(list, change_t*) = change;

Modified: subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.h
URL: http://svn.apache.org/viewvc/subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.h?rev=1498157&r1=1498156&r2=1498157&view=diff
==============================================================================
--- subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.h (original)
+++ subversion/branches/fsfs-format7/subversion/libsvn_fs_x/changes.h Sun Jun 30 17:01:16 2013
@@ -30,7 +30,7 @@
  * changes to similar paths).  Even more so, change lists from a larger
  * revision range also tend to overlap.
  *
- * In its serialized form, the svn_fs_fs__changes_t container extracts most
+ * In its serialized form, the svn_fs_x__changes_t container extracts most
  * of that redundancy and the run-time representation is also much smaller
  * than sum of the respective change_t* arrays.
  *
@@ -41,31 +41,31 @@
 
 /* An opaque collection of change lists (apr_array_header_t * of change_t*).
  */
-typedef struct svn_fs_fs__changes_t svn_fs_fs__changes_t;
+typedef struct svn_fs_x__changes_t svn_fs_x__changes_t;
 
 /* Create and populate changes containers. */
 
 /* Create and return a new changes container with an initial capacity of
  * INITIAL_COUNT change_t objects.  Allocate the result in POOL.
  */
-svn_fs_fs__changes_t *
-svn_fs_fs__changes_create(apr_size_t initial_count,
-                          apr_pool_t *pool);
+svn_fs_x__changes_t *
+svn_fs_x__changes_create(apr_size_t initial_count,
+                         apr_pool_t *pool);
 
 /* Start a new change list CHANGES (implicitly terminating the previous one)
  * and return its index in *LIST_INDEX.  Append all changes from LIST to
  * that new change list.
  */
 svn_error_t *
-svn_fs_fs__changes_append_list(apr_size_t *list_index,
-                               svn_fs_fs__changes_t *changes,
-                               apr_array_header_t *list);
+svn_fs_x__changes_append_list(apr_size_t *list_index,
+                              svn_fs_x__changes_t *changes,
+                              apr_array_header_t *list);
 
 /* Return a rough estimate in bytes for the serialized representation
  * of CHANGES.
  */
 apr_size_t
-svn_fs_fs__changes_estimate_size(const svn_fs_fs__changes_t *changes);
+svn_fs_x__changes_estimate_size(const svn_fs_x__changes_t *changes);
 
 /* Read changes containers. */
 
@@ -73,10 +73,10 @@ svn_fs_fs__changes_estimate_size(const s
  * the result in POOL and return it in *LIST.
  */
 svn_error_t *
-svn_fs_fs__changes_get_list(apr_array_header_t **list,
-                            const svn_fs_fs__changes_t *changes,
-                            apr_size_t idx,
-                            apr_pool_t *pool);
+svn_fs_x__changes_get_list(apr_array_header_t **list,
+                           const svn_fs_x__changes_t *changes,
+                           apr_size_t idx,
+                           apr_pool_t *pool);
 
 /* I/O interface. */
 
@@ -84,47 +84,47 @@ svn_fs_fs__changes_get_list(apr_array_he
  * temporary allocations.
  */
 svn_error_t *
-svn_fs_fs__write_changes_container(svn_stream_t *stream,
-                                   const svn_fs_fs__changes_t *changes,
-                                   apr_pool_t *pool);
+svn_fs_x__write_changes_container(svn_stream_t *stream,
+                                  const svn_fs_x__changes_t *changes,
+                                  apr_pool_t *pool);
 
 /* Read a changes container from its serialized representation in STREAM.
  * Allocate the result in RESULT_POOL and return it in *CHANGES_P.  Use
  * SCRATCH_POOL for temporary allocations.
  */
 svn_error_t *
-svn_fs_fs__read_changes_container(svn_fs_fs__changes_t **changes_p,
-                                  svn_stream_t *stream,
-                                  apr_pool_t *result_pool,
-                                  apr_pool_t *scratch_pool);
+svn_fs_x__read_changes_container(svn_fs_x__changes_t **changes_p,
+                                 svn_stream_t *stream,
+                                 apr_pool_t *result_pool,
+                                 apr_pool_t *scratch_pool);
 
-/* Implements #svn_cache__serialize_func_t for svn_fs_fs__changes_t objects.
+/* Implements #svn_cache__serialize_func_t for svn_fs_x__changes_t objects.
  */
 svn_error_t *
-svn_fs_fs__serialize_changes_container(void **data,
-                                       apr_size_t *data_len,
-                                       void *in,
-                                       apr_pool_t *pool);
+svn_fs_x__serialize_changes_container(void **data,
+                                      apr_size_t *data_len,
+                                      void *in,
+                                      apr_pool_t *pool);
 
-/* Implements #svn_cache__deserialize_func_t for svn_fs_fs__changes_t objects.
+/* Implements #svn_cache__deserialize_func_t for svn_fs_x__changes_t objects.
  */
 svn_error_t *
-svn_fs_fs__deserialize_changes_container(void **out,
-                                         void *data,
-                                         apr_size_t data_len,
-                                         apr_pool_t *pool);
+svn_fs_x__deserialize_changes_container(void **out,
+                                        void *data,
+                                        apr_size_t data_len,
+                                        apr_pool_t *pool);
 
-/* Implements svn_cache__partial_getter_func_t for svn_fs_fs__changes_t,
+/* Implements svn_cache__partial_getter_func_t for svn_fs_x__changes_t,
  * setting *OUT to the change list (apr_array_header_t *) selected by
  * the apr_uint32_t index passed in as *BATON.  This function is similar
- * to svn_fs_fs__changes_get_list but operates on the cache serialized
+ * to svn_fs_x__changes_get_list but operates on the cache serialized
  * representation of the container.
  */
 svn_error_t *
-svn_fs_fs__changes_get_list_func(void **out,
-                                 const void *data,
-                                 apr_size_t data_len,
-                                 void *baton,
-                                 apr_pool_t *pool);
+svn_fs_x__changes_get_list_func(void **out,
+                                const void *data,
+                                apr_size_t data_len,
+                                void *baton,
+                                apr_pool_t *pool);
 
 #endif
\ No newline at end of file

Modified: subversion/branches/fsfs-format7/subversion/libsvn_fs_x/dag.c
URL: http://svn.apache.org/viewvc/subversion/branches/fsfs-format7/subversion/libsvn_fs_x/dag.c?rev=1498157&r1=1498156&r2=1498157&view=diff
==============================================================================
--- subversion/branches/fsfs-format7/subversion/libsvn_fs_x/dag.c (original)
+++ subversion/branches/fsfs-format7/subversion/libsvn_fs_x/dag.c Sun Jun 30 17:01:16 2013
@@ -81,34 +81,34 @@ struct dag_node_t
 
 
 /* Trivial helper/accessor functions. */
-svn_node_kind_t svn_fs_fs__dag_node_kind(dag_node_t *node)
+svn_node_kind_t svn_fs_x__dag_node_kind(dag_node_t *node)
 {
   return node->kind;
 }
 
 
 const svn_fs_id_t *
-svn_fs_fs__dag_get_id(const dag_node_t *node)
+svn_fs_x__dag_get_id(const dag_node_t *node)
 {
   return node->id;
 }
 
 
 const char *
-svn_fs_fs__dag_get_created_path(dag_node_t *node)
+svn_fs_x__dag_get_created_path(dag_node_t *node)
 {
   return node->created_path;
 }
 
 
 svn_fs_t *
-svn_fs_fs__dag_get_fs(dag_node_t *node)
+svn_fs_x__dag_get_fs(dag_node_t *node)
 {
   return node->fs;
 }
 
 void
-svn_fs_fs__dag_set_fs(dag_node_t *node, svn_fs_t *fs)
+svn_fs_x__dag_set_fs(dag_node_t *node, svn_fs_t *fs)
 {
   node->fs = fs;
 }
@@ -123,15 +123,15 @@ copy_node_revision(node_revision_t *node
   node_revision_t *nr = apr_pcalloc(pool, sizeof(*nr));
   nr->kind = noderev->kind;
   if (noderev->predecessor_id)
-    nr->predecessor_id = svn_fs_fs__id_copy(noderev->predecessor_id, pool);
+    nr->predecessor_id = svn_fs_x__id_copy(noderev->predecessor_id, pool);
   nr->predecessor_count = noderev->predecessor_count;
   if (noderev->copyfrom_path)
     nr->copyfrom_path = apr_pstrdup(pool, noderev->copyfrom_path);
   nr->copyfrom_rev = noderev->copyfrom_rev;
   nr->copyroot_path = apr_pstrdup(pool, noderev->copyroot_path);
   nr->copyroot_rev = noderev->copyroot_rev;
-  nr->data_rep = svn_fs_fs__rep_copy(noderev->data_rep, pool);
-  nr->prop_rep = svn_fs_fs__rep_copy(noderev->prop_rep, pool);
+  nr->data_rep = svn_fs_x__rep_copy(noderev->data_rep, pool);
+  nr->prop_rep = svn_fs_x__rep_copy(noderev->prop_rep, pool);
   nr->mergeinfo_count = noderev->mergeinfo_count;
   nr->has_mergeinfo = noderev->has_mergeinfo;
 
@@ -161,8 +161,8 @@ get_node_revision(node_revision_t **node
     {
       node_revision_t *noderev;
 
-      SVN_ERR(svn_fs_fs__get_node_revision(&noderev, node->fs,
-                                           node->id, node->node_pool));
+      SVN_ERR(svn_fs_x__get_node_revision(&noderev, node->fs,
+                                          node->id, node->node_pool));
       node->node_revision = noderev;
     }
 
@@ -172,17 +172,17 @@ get_node_revision(node_revision_t **node
 }
 
 
-svn_boolean_t svn_fs_fs__dag_check_mutable(const dag_node_t *node)
+svn_boolean_t svn_fs_x__dag_check_mutable(const dag_node_t *node)
 {
-  return svn_fs_fs__id_is_txn(svn_fs_fs__dag_get_id(node));
+  return svn_fs_x__id_is_txn(svn_fs_x__dag_get_id(node));
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_get_node(dag_node_t **node,
-                        svn_fs_t *fs,
-                        const svn_fs_id_t *id,
-                        apr_pool_t *pool)
+svn_fs_x__dag_get_node(dag_node_t **node,
+                       svn_fs_t *fs,
+                       const svn_fs_id_t *id,
+                       apr_pool_t *pool)
 {
   dag_node_t *new_node;
   node_revision_t *noderev;
@@ -190,7 +190,7 @@ svn_fs_fs__dag_get_node(dag_node_t **nod
   /* Construct the node. */
   new_node = apr_pcalloc(pool, sizeof(*new_node));
   new_node->fs = fs;
-  new_node->id = svn_fs_fs__id_copy(id, pool);
+  new_node->id = svn_fs_x__id_copy(id, pool);
 
   /* Grab the contents so we can inspect the node's kind and created path. */
   new_node->node_pool = pool;
@@ -212,9 +212,9 @@ svn_fs_fs__dag_get_node(dag_node_t **nod
 
 
 svn_error_t *
-svn_fs_fs__dag_get_revision(svn_revnum_t *rev,
-                            dag_node_t *node,
-                            apr_pool_t *pool)
+svn_fs_x__dag_get_revision(svn_revnum_t *rev,
+                           dag_node_t *node,
+                           apr_pool_t *pool)
 {
   /* In the special case that this is an unmodified transaction root,
      we need to actually get the revision of the noderev's predecessor
@@ -223,15 +223,15 @@ svn_fs_fs__dag_get_revision(svn_revnum_t
     ? node->fresh_root_predecessor_id : node->id;
 
   /* Look up the committed revision from the Node-ID. */
-  *rev = svn_fs_fs__id_rev(correct_id);
+  *rev = svn_fs_x__id_rev(correct_id);
 
   return SVN_NO_ERROR;
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_get_predecessor_id(const svn_fs_id_t **id_p,
-                                  dag_node_t *node)
+svn_fs_x__dag_get_predecessor_id(const svn_fs_id_t **id_p,
+                                 dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -242,8 +242,8 @@ svn_fs_fs__dag_get_predecessor_id(const 
 
 
 svn_error_t *
-svn_fs_fs__dag_get_predecessor_count(int *count,
-                                     dag_node_t *node)
+svn_fs_x__dag_get_predecessor_count(int *count,
+                                    dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -253,8 +253,8 @@ svn_fs_fs__dag_get_predecessor_count(int
 }
 
 svn_error_t *
-svn_fs_fs__dag_get_mergeinfo_count(apr_int64_t *count,
-                                   dag_node_t *node)
+svn_fs_x__dag_get_mergeinfo_count(apr_int64_t *count,
+                                  dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -264,8 +264,8 @@ svn_fs_fs__dag_get_mergeinfo_count(apr_i
 }
 
 svn_error_t *
-svn_fs_fs__dag_has_mergeinfo(svn_boolean_t *has_mergeinfo,
-                             dag_node_t *node)
+svn_fs_x__dag_has_mergeinfo(svn_boolean_t *has_mergeinfo,
+                            dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -275,8 +275,8 @@ svn_fs_fs__dag_has_mergeinfo(svn_boolean
 }
 
 svn_error_t *
-svn_fs_fs__dag_has_descendants_with_mergeinfo(svn_boolean_t *do_they,
-                                              dag_node_t *node)
+svn_fs_x__dag_has_descendants_with_mergeinfo(svn_boolean_t *do_they,
+                                             dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -313,8 +313,8 @@ dir_entry_id_from_node(const svn_fs_id_t
 {
   svn_fs_dirent_t *dirent;
 
-  SVN_ERR(svn_fs_fs__dag_dir_entry(&dirent, parent, name, result_pool,
-                                   scratch_pool));
+  SVN_ERR(svn_fs_x__dag_dir_entry(&dirent, parent, name, result_pool,
+                                  scratch_pool));
   *id_p = dirent ? dirent->id : NULL;
 
   return SVN_NO_ERROR;
@@ -334,7 +334,7 @@ set_entry(dag_node_t *parent,
           const char *name,
           const svn_fs_id_t *id,
           svn_node_kind_t kind,
-          const svn_fs_fs__id_part_t *txn_id,
+          const svn_fs_x__id_part_t *txn_id,
           apr_pool_t *pool)
 {
   node_revision_t *parent_noderev;
@@ -343,8 +343,8 @@ set_entry(dag_node_t *parent,
   SVN_ERR(get_node_revision(&parent_noderev, parent));
 
   /* Set the new entry. */
-  return svn_fs_fs__set_entry(parent->fs, txn_id, parent_noderev, name, id,
-                              kind, pool);
+  return svn_fs_x__set_entry(parent->fs, txn_id, parent_noderev, name, id,
+                             kind, pool);
 }
 
 
@@ -361,7 +361,7 @@ make_entry(dag_node_t **child_p,
            const char *parent_path,
            const char *name,
            svn_boolean_t is_dir,
-           const svn_fs_fs__id_part_t *txn_id,
+           const svn_fs_x__id_part_t *txn_id,
            apr_pool_t *pool)
 {
   const svn_fs_id_t *new_node_id;
@@ -380,7 +380,7 @@ make_entry(dag_node_t **child_p,
        _("Attempted to create entry in non-directory parent"));
 
   /* Check that the parent is mutable. */
-  if (! svn_fs_fs__dag_check_mutable(parent))
+  if (! svn_fs_x__dag_check_mutable(parent))
     return svn_error_createf
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        _("Attempted to clone child of non-mutable node"));
@@ -397,25 +397,25 @@ make_entry(dag_node_t **child_p,
   new_noderev.copyfrom_rev = SVN_INVALID_REVNUM;
   new_noderev.copyfrom_path = NULL;
 
-  SVN_ERR(svn_fs_fs__create_node
-          (&new_node_id, svn_fs_fs__dag_get_fs(parent), &new_noderev,
-           svn_fs_fs__id_copy_id(svn_fs_fs__dag_get_id(parent)),
+  SVN_ERR(svn_fs_x__create_node
+          (&new_node_id, svn_fs_x__dag_get_fs(parent), &new_noderev,
+           svn_fs_x__id_copy_id(svn_fs_x__dag_get_id(parent)),
            txn_id, pool));
 
   /* Create a new dag_node_t for our new node */
-  SVN_ERR(svn_fs_fs__dag_get_node(child_p, svn_fs_fs__dag_get_fs(parent),
-                                  new_node_id, pool));
+  SVN_ERR(svn_fs_x__dag_get_node(child_p, svn_fs_x__dag_get_fs(parent),
+                                 new_node_id, pool));
 
   /* We can safely call set_entry because we already know that
      PARENT is mutable, and we just created CHILD, so we know it has
      no ancestors (therefore, PARENT cannot be an ancestor of CHILD) */
-  return set_entry(parent, name, svn_fs_fs__dag_get_id(*child_p),
+  return set_entry(parent, name, svn_fs_x__dag_get_id(*child_p),
                    new_noderev.kind, txn_id, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_dir_entries(apr_hash_t **entries,
+svn_fs_x__dag_dir_entries(apr_hash_t **entries,
                            dag_node_t *node,
                            apr_pool_t *pool)
 {
@@ -427,11 +427,11 @@ svn_fs_fs__dag_dir_entries(apr_hash_t **
     return svn_error_create(SVN_ERR_FS_NOT_DIRECTORY, NULL,
                             _("Can't get entries of non-directory"));
 
-  return svn_fs_fs__rep_contents_dir(entries, node->fs, noderev, pool);
+  return svn_fs_x__rep_contents_dir(entries, node->fs, noderev, pool);
 }
 
 svn_error_t *
-svn_fs_fs__dag_dir_entry(svn_fs_dirent_t **dirent,
+svn_fs_x__dag_dir_entry(svn_fs_dirent_t **dirent,
                          dag_node_t *node,
                          const char* name,
                          apr_pool_t *result_pool,
@@ -445,18 +445,18 @@ svn_fs_fs__dag_dir_entry(svn_fs_dirent_t
                             _("Can't get entries of non-directory"));
 
   /* Get a dirent hash for this directory. */
-  return svn_fs_fs__rep_contents_dir_entry(dirent, node->fs, noderev, name,
-                                           result_pool, scratch_pool);
+  return svn_fs_x__rep_contents_dir_entry(dirent, node->fs, noderev, name,
+                                          result_pool, scratch_pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_set_entry(dag_node_t *node,
-                         const char *entry_name,
-                         const svn_fs_id_t *id,
-                         svn_node_kind_t kind,
-                         const svn_fs_fs__id_part_t *txn_id,
-                         apr_pool_t *pool)
+svn_fs_x__dag_set_entry(dag_node_t *node,
+                        const char *entry_name,
+                        const svn_fs_id_t *id,
+                        svn_node_kind_t kind,
+                        const svn_fs_x__id_part_t *txn_id,
+                        apr_pool_t *pool)
 {
   /* Check it's a directory. */
   if (node->kind != svn_node_dir)
@@ -465,7 +465,7 @@ svn_fs_fs__dag_set_entry(dag_node_t *nod
        _("Attempted to set entry in non-directory node"));
 
   /* Check it's mutable. */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     return svn_error_create
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        _("Attempted to set entry in immutable node"));
@@ -478,17 +478,16 @@ svn_fs_fs__dag_set_entry(dag_node_t *nod
 /*** Proplists. ***/
 
 svn_error_t *
-svn_fs_fs__dag_get_proplist(apr_hash_t **proplist_p,
-                            dag_node_t *node,
-                            apr_pool_t *pool)
+svn_fs_x__dag_get_proplist(apr_hash_t **proplist_p,
+                           dag_node_t *node,
+                           apr_pool_t *pool)
 {
   node_revision_t *noderev;
   apr_hash_t *proplist = NULL;
 
   SVN_ERR(get_node_revision(&noderev, node));
 
-  SVN_ERR(svn_fs_fs__get_proplist(&proplist, node->fs,
-                                  noderev, pool));
+  SVN_ERR(svn_fs_x__get_proplist(&proplist, node->fs, noderev, pool));
 
   *proplist_p = proplist;
 
@@ -497,16 +496,16 @@ svn_fs_fs__dag_get_proplist(apr_hash_t *
 
 
 svn_error_t *
-svn_fs_fs__dag_set_proplist(dag_node_t *node,
-                            apr_hash_t *proplist,
-                            apr_pool_t *pool)
+svn_fs_x__dag_set_proplist(dag_node_t *node,
+                           apr_hash_t *proplist,
+                           apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
   /* Sanity check: this node better be mutable! */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     {
-      svn_string_t *idstr = svn_fs_fs__id_unparse(node->id, pool);
+      svn_string_t *idstr = svn_fs_x__id_unparse(node->id, pool);
       return svn_error_createf
         (SVN_ERR_FS_NOT_MUTABLE, NULL,
          "Can't set proplist on *immutable* node-revision %s",
@@ -517,21 +516,21 @@ svn_fs_fs__dag_set_proplist(dag_node_t *
   SVN_ERR(get_node_revision(&noderev, node));
 
   /* Set the new proplist. */
-  return svn_fs_fs__set_proplist(node->fs, noderev, proplist, pool);
+  return svn_fs_x__set_proplist(node->fs, noderev, proplist, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_increment_mergeinfo_count(dag_node_t *node,
-                                         apr_int64_t increment,
-                                         apr_pool_t *pool)
+svn_fs_x__dag_increment_mergeinfo_count(dag_node_t *node,
+                                        apr_int64_t increment,
+                                        apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
   /* Sanity check: this node better be mutable! */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     {
-      svn_string_t *idstr = svn_fs_fs__id_unparse(node->id, pool);
+      svn_string_t *idstr = svn_fs_x__id_unparse(node->id, pool);
       return svn_error_createf
         (SVN_ERR_FS_NOT_MUTABLE, NULL,
          "Can't increment mergeinfo count on *immutable* node-revision %s",
@@ -547,7 +546,7 @@ svn_fs_fs__dag_increment_mergeinfo_count
   noderev->mergeinfo_count += increment;
   if (noderev->mergeinfo_count < 0)
     {
-      svn_string_t *idstr = svn_fs_fs__id_unparse(node->id, pool);
+      svn_string_t *idstr = svn_fs_x__id_unparse(node->id, pool);
       return svn_error_createf
         (SVN_ERR_FS_CORRUPT, NULL,
          apr_psprintf(pool,
@@ -558,7 +557,7 @@ svn_fs_fs__dag_increment_mergeinfo_count
     }
   if (noderev->mergeinfo_count > 1 && noderev->kind == svn_node_file)
     {
-      svn_string_t *idstr = svn_fs_fs__id_unparse(node->id, pool);
+      svn_string_t *idstr = svn_fs_x__id_unparse(node->id, pool);
       return svn_error_createf
         (SVN_ERR_FS_CORRUPT, NULL,
          apr_psprintf(pool,
@@ -569,21 +568,21 @@ svn_fs_fs__dag_increment_mergeinfo_count
     }
 
   /* Flush it out. */
-  return svn_fs_fs__put_node_revision(node->fs, noderev->id,
-                                      noderev, FALSE, pool);
+  return svn_fs_x__put_node_revision(node->fs, noderev->id,
+                                     noderev, FALSE, pool);
 }
 
 svn_error_t *
-svn_fs_fs__dag_set_has_mergeinfo(dag_node_t *node,
+svn_fs_x__dag_set_has_mergeinfo(dag_node_t *node,
                                  svn_boolean_t has_mergeinfo,
                                  apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
   /* Sanity check: this node better be mutable! */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     {
-      svn_string_t *idstr = svn_fs_fs__id_unparse(node->id, pool);
+      svn_string_t *idstr = svn_fs_x__id_unparse(node->id, pool);
       return svn_error_createf
         (SVN_ERR_FS_NOT_MUTABLE, NULL,
          "Can't set mergeinfo flag on *immutable* node-revision %s",
@@ -596,25 +595,25 @@ svn_fs_fs__dag_set_has_mergeinfo(dag_nod
   noderev->has_mergeinfo = has_mergeinfo;
 
   /* Flush it out. */
-  return svn_fs_fs__put_node_revision(node->fs, noderev->id,
-                                      noderev, FALSE, pool);
+  return svn_fs_x__put_node_revision(node->fs, noderev->id,
+                                     noderev, FALSE, pool);
 }
 
 
 /*** Roots. ***/
 
 svn_error_t *
-svn_fs_fs__dag_revision_root(dag_node_t **node_p,
-                             svn_fs_t *fs,
-                             svn_revnum_t rev,
-                             apr_pool_t *pool)
+svn_fs_x__dag_revision_root(dag_node_t **node_p,
+                            svn_fs_t *fs,
+                            svn_revnum_t rev,
+                            apr_pool_t *pool)
 {
   dag_node_t *new_node;
 
   /* Construct the node. */
   new_node = apr_pcalloc(pool, sizeof(*new_node));
   new_node->fs = fs;
-  SVN_ERR(svn_fs_fs__rev_get_root(&new_node->id, fs, rev, pool));
+  SVN_ERR(svn_fs_x__rev_get_root(&new_node->id, fs, rev, pool));
 
   /* Grab the contents so we can inspect the node's kind and created path. */
   new_node->node_pool = pool;
@@ -631,48 +630,48 @@ svn_fs_fs__dag_revision_root(dag_node_t 
 
 
 svn_error_t *
-svn_fs_fs__dag_txn_root(dag_node_t **node_p,
-                        svn_fs_t *fs,
-                        const svn_fs_fs__id_part_t *txn_id,
-                        apr_pool_t *pool)
+svn_fs_x__dag_txn_root(dag_node_t **node_p,
+                       svn_fs_t *fs,
+                       const svn_fs_x__id_part_t *txn_id,
+                       apr_pool_t *pool)
 {
   const svn_fs_id_t *root_id, *ignored;
 
-  SVN_ERR(svn_fs_fs__get_txn_ids(&root_id, &ignored, fs, txn_id, pool));
-  return svn_fs_fs__dag_get_node(node_p, fs, root_id, pool);
+  SVN_ERR(svn_fs_x__get_txn_ids(&root_id, &ignored, fs, txn_id, pool));
+  return svn_fs_x__dag_get_node(node_p, fs, root_id, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_txn_base_root(dag_node_t **node_p,
-                             svn_fs_t *fs,
-                             const svn_fs_fs__id_part_t *txn_id,
+svn_fs_x__dag_txn_base_root(dag_node_t **node_p,
+                            svn_fs_t *fs,
+                            const svn_fs_x__id_part_t *txn_id,
                              apr_pool_t *pool)
 {
   const svn_fs_id_t *base_root_id, *ignored;
 
-  SVN_ERR(svn_fs_fs__get_txn_ids(&ignored, &base_root_id, fs, txn_id, pool));
-  return svn_fs_fs__dag_get_node(node_p, fs, base_root_id, pool);
+  SVN_ERR(svn_fs_x__get_txn_ids(&ignored, &base_root_id, fs, txn_id, pool));
+  return svn_fs_x__dag_get_node(node_p, fs, base_root_id, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_clone_child(dag_node_t **child_p,
-                           dag_node_t *parent,
-                           const char *parent_path,
-                           const char *name,
-                           const svn_fs_fs__id_part_t *copy_id,
-                           const svn_fs_fs__id_part_t *txn_id,
-                           svn_boolean_t is_parent_copyroot,
-                           apr_pool_t *pool)
+svn_fs_x__dag_clone_child(dag_node_t **child_p,
+                          dag_node_t *parent,
+                          const char *parent_path,
+                          const char *name,
+                          const svn_fs_x__id_part_t *copy_id,
+                          const svn_fs_x__id_part_t *txn_id,
+                          svn_boolean_t is_parent_copyroot,
+                          apr_pool_t *pool)
 {
   dag_node_t *cur_entry; /* parent's current entry named NAME */
   const svn_fs_id_t *new_node_id; /* node id we'll put into NEW_NODE */
-  svn_fs_t *fs = svn_fs_fs__dag_get_fs(parent);
+  svn_fs_t *fs = svn_fs_x__dag_get_fs(parent);
   apr_pool_t *subpool = svn_pool_create(pool);
 
   /* First check that the parent is mutable. */
-  if (! svn_fs_fs__dag_check_mutable(parent))
+  if (! svn_fs_x__dag_check_mutable(parent))
     return svn_error_createf
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        "Attempted to clone child of non-mutable node");
@@ -684,11 +683,11 @@ svn_fs_fs__dag_clone_child(dag_node_t **
        "Attempted to make a child clone with an illegal name '%s'", name);
 
   /* Find the node named NAME in PARENT's entries list if it exists. */
-  SVN_ERR(svn_fs_fs__dag_open(&cur_entry, parent, name, pool, subpool));
+  SVN_ERR(svn_fs_x__dag_open(&cur_entry, parent, name, pool, subpool));
 
   /* Check for mutability in the node we found.  If it's mutable, we
      don't need to clone it. */
-  if (svn_fs_fs__dag_check_mutable(cur_entry))
+  if (svn_fs_x__dag_check_mutable(cur_entry))
     {
       /* This has already been cloned */
       new_node_id = cur_entry->id;
@@ -711,12 +710,12 @@ svn_fs_fs__dag_clone_child(dag_node_t **
       noderev->copyfrom_path = NULL;
       noderev->copyfrom_rev = SVN_INVALID_REVNUM;
 
-      noderev->predecessor_id = svn_fs_fs__id_copy(cur_entry->id, pool);
+      noderev->predecessor_id = svn_fs_x__id_copy(cur_entry->id, pool);
       if (noderev->predecessor_count != -1)
         noderev->predecessor_count++;
       noderev->created_path = svn_fspath__join(parent_path, name, pool);
 
-      SVN_ERR(svn_fs_fs__create_successor(&new_node_id, fs, cur_entry->id,
+      SVN_ERR(svn_fs_x__create_successor(&new_node_id, fs, cur_entry->id,
                                           noderev, copy_id, txn_id, pool));
 
       /* Replace the ID in the parent's ENTRY list with the ID which
@@ -727,27 +726,27 @@ svn_fs_fs__dag_clone_child(dag_node_t **
 
   /* Initialize the youngster. */
   svn_pool_destroy(subpool);
-  return svn_fs_fs__dag_get_node(child_p, fs, new_node_id, pool);
+  return svn_fs_x__dag_get_node(child_p, fs, new_node_id, pool);
 }
 
 
 
 svn_error_t *
-svn_fs_fs__dag_clone_root(dag_node_t **root_p,
-                          svn_fs_t *fs,
-                          const svn_fs_fs__id_part_t *txn_id,
-                          apr_pool_t *pool)
+svn_fs_x__dag_clone_root(dag_node_t **root_p,
+                         svn_fs_t *fs,
+                         const svn_fs_x__id_part_t *txn_id,
+                         apr_pool_t *pool)
 {
   const svn_fs_id_t *base_root_id, *root_id;
 
   /* Get the node ID's of the root directories of the transaction and
      its base revision.  */
-  SVN_ERR(svn_fs_fs__get_txn_ids(&root_id, &base_root_id, fs, txn_id, pool));
+  SVN_ERR(svn_fs_x__get_txn_ids(&root_id, &base_root_id, fs, txn_id, pool));
 
   /* Oh, give me a clone...
      (If they're the same, we haven't cloned the transaction's root
      directory yet.)  */
-  SVN_ERR_ASSERT(!svn_fs_fs__id_eq(root_id, base_root_id));
+  SVN_ERR_ASSERT(!svn_fs_x__id_eq(root_id, base_root_id));
 
   /*
    * (Sung to the tune of "Home, Home on the Range", with thanks to
@@ -755,15 +754,15 @@ svn_fs_fs__dag_clone_root(dag_node_t **r
    */
 
   /* One way or another, root_id now identifies a cloned root node. */
-  return svn_fs_fs__dag_get_node(root_p, fs, root_id, pool);
+  return svn_fs_x__dag_get_node(root_p, fs, root_id, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_delete(dag_node_t *parent,
-                      const char *name,
-                      const svn_fs_fs__id_part_t *txn_id,
-                      apr_pool_t *pool)
+svn_fs_x__dag_delete(dag_node_t *parent,
+                     const char *name,
+                     const svn_fs_x__id_part_t *txn_id,
+                     apr_pool_t *pool)
 {
   node_revision_t *parent_noderev;
   svn_fs_t *fs = parent->fs;
@@ -778,7 +777,7 @@ svn_fs_fs__dag_delete(dag_node_t *parent
        "Attempted to delete entry '%s' from *non*-directory node", name);
 
   /* Make sure parent is mutable. */
-  if (! svn_fs_fs__dag_check_mutable(parent))
+  if (! svn_fs_x__dag_check_mutable(parent))
     return svn_error_createf
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        "Attempted to delete entry '%s' from immutable directory node", name);
@@ -795,8 +794,8 @@ svn_fs_fs__dag_delete(dag_node_t *parent
   subpool = svn_pool_create(pool);
 
   /* Search this directory for a dirent with that NAME. */
-  SVN_ERR(svn_fs_fs__rep_contents_dir_entry(&dirent, fs, parent_noderev,
-                                            name, subpool, subpool));
+  SVN_ERR(svn_fs_x__rep_contents_dir_entry(&dirent, fs, parent_noderev,
+                                           name, subpool, subpool));
 
   /* If we never found ID in ENTRIES (perhaps because there are no
      ENTRIES, perhaps because ID just isn't in the existing ENTRIES
@@ -808,50 +807,50 @@ svn_fs_fs__dag_delete(dag_node_t *parent
 
   /* Copy the ID out of the subpool and release the rest of the
      directory listing. */
-  id = svn_fs_fs__id_copy(dirent->id, pool);
+  id = svn_fs_x__id_copy(dirent->id, pool);
   svn_pool_destroy(subpool);
 
   /* If mutable, remove it and any mutable children from db. */
-  SVN_ERR(svn_fs_fs__dag_delete_if_mutable(parent->fs, id, pool));
+  SVN_ERR(svn_fs_x__dag_delete_if_mutable(parent->fs, id, pool));
 
   /* Remove this entry from its parent's entries list. */
-  return svn_fs_fs__set_entry(parent->fs, txn_id, parent_noderev, name,
-                              NULL, svn_node_unknown, pool);
+  return svn_fs_x__set_entry(parent->fs, txn_id, parent_noderev, name,
+                             NULL, svn_node_unknown, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_remove_node(svn_fs_t *fs,
-                           const svn_fs_id_t *id,
-                           apr_pool_t *pool)
+svn_fs_x__dag_remove_node(svn_fs_t *fs,
+                          const svn_fs_id_t *id,
+                          apr_pool_t *pool)
 {
   dag_node_t *node;
 
   /* Fetch the node. */
-  SVN_ERR(svn_fs_fs__dag_get_node(&node, fs, id, pool));
+  SVN_ERR(svn_fs_x__dag_get_node(&node, fs, id, pool));
 
   /* If immutable, do nothing and return immediately. */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     return svn_error_createf(SVN_ERR_FS_NOT_MUTABLE, NULL,
                              "Attempted removal of immutable node");
 
   /* Delete the node revision. */
-  return svn_fs_fs__delete_node_revision(fs, id, pool);
+  return svn_fs_x__delete_node_revision(fs, id, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_delete_if_mutable(svn_fs_t *fs,
-                                 const svn_fs_id_t *id,
-                                 apr_pool_t *pool)
+svn_fs_x__dag_delete_if_mutable(svn_fs_t *fs,
+                                const svn_fs_id_t *id,
+                                apr_pool_t *pool)
 {
   dag_node_t *node;
 
   /* Get the node. */
-  SVN_ERR(svn_fs_fs__dag_get_node(&node, fs, id, pool));
+  SVN_ERR(svn_fs_x__dag_get_node(&node, fs, id, pool));
 
   /* If immutable, do nothing and return immediately. */
-  if (! svn_fs_fs__dag_check_mutable(node))
+  if (! svn_fs_x__dag_check_mutable(node))
     return SVN_NO_ERROR;
 
   /* Else it's mutable.  Recurse on directories... */
@@ -861,7 +860,7 @@ svn_fs_fs__dag_delete_if_mutable(svn_fs_
       apr_hash_index_t *hi;
 
       /* Loop over hash entries */
-      SVN_ERR(svn_fs_fs__dag_dir_entries(&entries, node, pool));
+      SVN_ERR(svn_fs_x__dag_dir_entries(&entries, node, pool));
       if (entries)
         {
           for (hi = apr_hash_first(pool, entries);
@@ -870,24 +869,23 @@ svn_fs_fs__dag_delete_if_mutable(svn_fs_
             {
               svn_fs_dirent_t *dirent = svn__apr_hash_index_val(hi);
 
-              SVN_ERR(svn_fs_fs__dag_delete_if_mutable(fs, dirent->id,
-                                                       pool));
+              SVN_ERR(svn_fs_x__dag_delete_if_mutable(fs, dirent->id, pool));
             }
         }
     }
 
   /* ... then delete the node itself, after deleting any mutable
      representations and strings it points to. */
-  return svn_fs_fs__dag_remove_node(fs, id, pool);
+  return svn_fs_x__dag_remove_node(fs, id, pool);
 }
 
 svn_error_t *
-svn_fs_fs__dag_make_file(dag_node_t **child_p,
-                         dag_node_t *parent,
-                         const char *parent_path,
-                         const char *name,
-                         const svn_fs_fs__id_part_t *txn_id,
-                         apr_pool_t *pool)
+svn_fs_x__dag_make_file(dag_node_t **child_p,
+                        dag_node_t *parent,
+                        const char *parent_path,
+                        const char *name,
+                        const svn_fs_x__id_part_t *txn_id,
+                        apr_pool_t *pool)
 {
   /* Call our little helper function */
   return make_entry(child_p, parent, parent_path, name, FALSE, txn_id, pool);
@@ -895,12 +893,12 @@ svn_fs_fs__dag_make_file(dag_node_t **ch
 
 
 svn_error_t *
-svn_fs_fs__dag_make_dir(dag_node_t **child_p,
-                        dag_node_t *parent,
-                        const char *parent_path,
-                        const char *name,
-                        const svn_fs_fs__id_part_t *txn_id,
-                        apr_pool_t *pool)
+svn_fs_x__dag_make_dir(dag_node_t **child_p,
+                       dag_node_t *parent,
+                       const char *parent_path,
+                       const char *name,
+                       const svn_fs_x__id_part_t *txn_id,
+                       apr_pool_t *pool)
 {
   /* Call our little helper function */
   return make_entry(child_p, parent, parent_path, name, TRUE, txn_id, pool);
@@ -908,9 +906,9 @@ svn_fs_fs__dag_make_dir(dag_node_t **chi
 
 
 svn_error_t *
-svn_fs_fs__dag_get_contents(svn_stream_t **contents_p,
-                            dag_node_t *file,
-                            apr_pool_t *pool)
+svn_fs_x__dag_get_contents(svn_stream_t **contents_p,
+                           dag_node_t *file,
+                           apr_pool_t *pool)
 {
   node_revision_t *noderev;
   svn_stream_t *contents;
@@ -925,8 +923,8 @@ svn_fs_fs__dag_get_contents(svn_stream_t
   SVN_ERR(get_node_revision(&noderev, file));
 
   /* Get a stream to the contents. */
-  SVN_ERR(svn_fs_fs__get_contents(&contents, file->fs,
-                                  noderev->data_rep, pool));
+  SVN_ERR(svn_fs_x__get_contents(&contents, file->fs,
+                                 noderev->data_rep, pool));
 
   *contents_p = contents;
 
@@ -935,10 +933,10 @@ svn_fs_fs__dag_get_contents(svn_stream_t
 
 
 svn_error_t *
-svn_fs_fs__dag_get_file_delta_stream(svn_txdelta_stream_t **stream_p,
-                                     dag_node_t *source,
-                                     dag_node_t *target,
-                                     apr_pool_t *pool)
+svn_fs_x__dag_get_file_delta_stream(svn_txdelta_stream_t **stream_p,
+                                    dag_node_t *source,
+                                    dag_node_t *target,
+                                    apr_pool_t *pool)
 {
   node_revision_t *src_noderev;
   node_revision_t *tgt_noderev;
@@ -958,33 +956,33 @@ svn_fs_fs__dag_get_file_delta_stream(svn
   SVN_ERR(get_node_revision(&tgt_noderev, target));
 
   /* Get the delta stream. */
-  return svn_fs_fs__get_file_delta_stream(stream_p, target->fs,
-                                          src_noderev, tgt_noderev, pool);
+  return svn_fs_x__get_file_delta_stream(stream_p, target->fs,
+                                         src_noderev, tgt_noderev, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_try_process_file_contents(svn_boolean_t *success,
-                                         dag_node_t *node,
-                                         svn_fs_process_contents_func_t processor,
-                                         void* baton,
-                                         apr_pool_t *pool)
+svn_fs_x__dag_try_process_file_contents(svn_boolean_t *success,
+                                        dag_node_t *node,
+                                        svn_fs_process_contents_func_t processor,
+                                        void* baton,
+                                        apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
   /* Go get fresh node-revisions for the nodes. */
   SVN_ERR(get_node_revision(&noderev, node));
 
-  return svn_fs_fs__try_process_file_contents(success, node->fs,
-                                              noderev,
-                                              processor, baton, pool);
+  return svn_fs_x__try_process_file_contents(success, node->fs,
+                                             noderev,
+                                             processor, baton, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_file_length(svn_filesize_t *length,
-                           dag_node_t *file,
-                           apr_pool_t *pool)
+svn_fs_x__dag_file_length(svn_filesize_t *length,
+                          dag_node_t *file,
+                          apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
@@ -997,15 +995,15 @@ svn_fs_fs__dag_file_length(svn_filesize_
   /* Go get a fresh node-revision for FILE, and . */
   SVN_ERR(get_node_revision(&noderev, file));
 
-  return svn_fs_fs__file_length(length, noderev, pool);
+  return svn_fs_x__file_length(length, noderev, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_file_checksum(svn_checksum_t **checksum,
-                             dag_node_t *file,
-                             svn_checksum_kind_t kind,
-                             apr_pool_t *pool)
+svn_fs_x__dag_file_checksum(svn_checksum_t **checksum,
+                            dag_node_t *file,
+                            svn_checksum_kind_t kind,
+                            apr_pool_t *pool)
 {
   node_revision_t *noderev;
 
@@ -1016,14 +1014,14 @@ svn_fs_fs__dag_file_checksum(svn_checksu
 
   SVN_ERR(get_node_revision(&noderev, file));
 
-  return svn_fs_fs__file_checksum(checksum, noderev, kind, pool);
+  return svn_fs_x__file_checksum(checksum, noderev, kind, pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_get_edit_stream(svn_stream_t **contents,
-                               dag_node_t *file,
-                               apr_pool_t *pool)
+svn_fs_x__dag_get_edit_stream(svn_stream_t **contents,
+                              dag_node_t *file,
+                              apr_pool_t *pool)
 {
   node_revision_t *noderev;
   svn_stream_t *ws;
@@ -1035,7 +1033,7 @@ svn_fs_fs__dag_get_edit_stream(svn_strea
        "Attempted to set textual contents of a *non*-file node");
 
   /* Make sure our node is mutable. */
-  if (! svn_fs_fs__dag_check_mutable(file))
+  if (! svn_fs_x__dag_check_mutable(file))
     return svn_error_createf
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        "Attempted to set textual contents of an immutable node");
@@ -1043,7 +1041,7 @@ svn_fs_fs__dag_get_edit_stream(svn_strea
   /* Get the node revision. */
   SVN_ERR(get_node_revision(&noderev, file));
 
-  SVN_ERR(svn_fs_fs__set_contents(&ws, file->fs, noderev, pool));
+  SVN_ERR(svn_fs_x__set_contents(&ws, file->fs, noderev, pool));
 
   *contents = ws;
 
@@ -1053,16 +1051,16 @@ svn_fs_fs__dag_get_edit_stream(svn_strea
 
 
 svn_error_t *
-svn_fs_fs__dag_finalize_edits(dag_node_t *file,
-                              const svn_checksum_t *checksum,
-                              apr_pool_t *pool)
+svn_fs_x__dag_finalize_edits(dag_node_t *file,
+                             const svn_checksum_t *checksum,
+                             apr_pool_t *pool)
 {
   if (checksum)
     {
       svn_checksum_t *file_checksum;
 
-      SVN_ERR(svn_fs_fs__dag_file_checksum(&file_checksum, file,
-                                           checksum->kind, pool));
+      SVN_ERR(svn_fs_x__dag_file_checksum(&file_checksum, file,
+                                          checksum->kind, pool));
       if (!svn_checksum_match(checksum, file_checksum))
         return svn_checksum_mismatch_err(checksum, file_checksum, pool,
                                          _("Checksum mismatch for '%s'"),
@@ -1074,23 +1072,23 @@ svn_fs_fs__dag_finalize_edits(dag_node_t
 
 
 dag_node_t *
-svn_fs_fs__dag_dup(const dag_node_t *node,
-                   apr_pool_t *pool)
+svn_fs_x__dag_dup(const dag_node_t *node,
+                  apr_pool_t *pool)
 {
   /* Allocate our new node. */
   dag_node_t *new_node = apr_pcalloc(pool, sizeof(*new_node));
 
   new_node->fs = node->fs;
-  new_node->id = svn_fs_fs__id_copy(node->id, pool);
+  new_node->id = svn_fs_x__id_copy(node->id, pool);
   new_node->kind = node->kind;
   new_node->created_path = apr_pstrdup(pool, node->created_path);
 
   /* Only copy cached node_revision_t for immutable nodes. */
-  if (node->node_revision && !svn_fs_fs__dag_check_mutable(node))
+  if (node->node_revision && !svn_fs_x__dag_check_mutable(node))
     {
       new_node->node_revision = copy_node_revision(node->node_revision, pool);
       new_node->node_revision->id =
-          svn_fs_fs__id_copy(node->node_revision->id, pool);
+          svn_fs_x__id_copy(node->node_revision->id, pool);
       new_node->node_revision->is_fresh_txn_root =
           node->node_revision->is_fresh_txn_root;
     }
@@ -1100,10 +1098,10 @@ svn_fs_fs__dag_dup(const dag_node_t *nod
 }
 
 svn_error_t *
-svn_fs_fs__dag_serialize(void **data,
-                         apr_size_t *data_len,
-                         void *in,
-                         apr_pool_t *pool)
+svn_fs_x__dag_serialize(void **data,
+                        apr_size_t *data_len,
+                        void *in,
+                        apr_pool_t *pool)
 {
   dag_node_t *node = in;
   svn_stringbuf_t *serialized;
@@ -1116,8 +1114,8 @@ svn_fs_fs__dag_serialize(void **data,
                                 pool);
 
   /* for mutable nodes, we will _never_ cache the noderev */
-  if (node->node_revision && !svn_fs_fs__dag_check_mutable(node))
-    svn_fs_fs__noderev_serialize(context, &node->node_revision);
+  if (node->node_revision && !svn_fs_x__dag_check_mutable(node))
+    svn_fs_x__noderev_serialize(context, &node->node_revision);
   else
     svn_temp_serializer__set_null(context,
                                   (const void * const *)&node->node_revision);
@@ -1127,8 +1125,8 @@ svn_fs_fs__dag_serialize(void **data,
 				(const void * const *)&node->node_pool);
 
   /* serialize other sub-structures */
-  svn_fs_fs__id_serialize(context, (const svn_fs_id_t **)&node->id);
-  svn_fs_fs__id_serialize(context, &node->fresh_root_predecessor_id);
+  svn_fs_x__id_serialize(context, (const svn_fs_id_t **)&node->id);
+  svn_fs_x__id_serialize(context, &node->fresh_root_predecessor_id);
   svn_temp_serializer__add_string(context, &node->created_path);
 
   /* return serialized data */
@@ -1140,10 +1138,10 @@ svn_fs_fs__dag_serialize(void **data,
 }
 
 svn_error_t *
-svn_fs_fs__dag_deserialize(void **out,
-                           void *data,
-                           apr_size_t data_len,
-                           apr_pool_t *pool)
+svn_fs_x__dag_deserialize(void **out,
+                          void *data,
+                          apr_size_t data_len,
+                          apr_pool_t *pool)
 {
   dag_node_t *node = (dag_node_t *)data;
   if (data_len == 0)
@@ -1154,10 +1152,10 @@ svn_fs_fs__dag_deserialize(void **out,
   node->fs = NULL;
 
   /* fixup all references to sub-structures */
-  svn_fs_fs__id_deserialize(node, &node->id);
-  svn_fs_fs__id_deserialize(node,
+  svn_fs_x__id_deserialize(node, &node->id);
+  svn_fs_x__id_deserialize(node,
                             (svn_fs_id_t **)&node->fresh_root_predecessor_id);
-  svn_fs_fs__noderev_deserialize(node, &node->node_revision);
+  svn_fs_x__noderev_deserialize(node, &node->node_revision);
   node->node_pool = pool;
 
   svn_temp_deserializer__resolve(node, (void**)&node->created_path);
@@ -1169,11 +1167,11 @@ svn_fs_fs__dag_deserialize(void **out,
 }
 
 svn_error_t *
-svn_fs_fs__dag_open(dag_node_t **child_p,
-                    dag_node_t *parent,
-                    const char *name,
-                    apr_pool_t *result_pool,
-                    apr_pool_t *scratch_pool)
+svn_fs_x__dag_open(dag_node_t **child_p,
+                   dag_node_t *parent,
+                   const char *name,
+                   apr_pool_t *result_pool,
+                   apr_pool_t *scratch_pool)
 {
   const svn_fs_id_t *node_id;
 
@@ -1192,63 +1190,63 @@ svn_fs_fs__dag_open(dag_node_t **child_p
        "Attempted to open node with an illegal name '%s'", name);
 
   /* Now get the node that was requested. */
-  return svn_fs_fs__dag_get_node(child_p, svn_fs_fs__dag_get_fs(parent),
-                                 node_id, result_pool);
+  return svn_fs_x__dag_get_node(child_p, svn_fs_x__dag_get_fs(parent),
+                                node_id, result_pool);
 }
 
 
 svn_error_t *
-svn_fs_fs__dag_copy(dag_node_t *to_node,
-                    const char *entry,
-                    dag_node_t *from_node,
-                    svn_boolean_t preserve_history,
-                    svn_revnum_t from_rev,
-                    const char *from_path,
-                    const svn_fs_fs__id_part_t *txn_id,
-                    apr_pool_t *pool)
+svn_fs_x__dag_copy(dag_node_t *to_node,
+                   const char *entry,
+                   dag_node_t *from_node,
+                   svn_boolean_t preserve_history,
+                   svn_revnum_t from_rev,
+                   const char *from_path,
+                   const svn_fs_x__id_part_t *txn_id,
+                   apr_pool_t *pool)
 {
   const svn_fs_id_t *id;
 
   if (preserve_history)
     {
       node_revision_t *from_noderev, *to_noderev;
-      svn_fs_fs__id_part_t copy_id;
-      const svn_fs_id_t *src_id = svn_fs_fs__dag_get_id(from_node);
-      svn_fs_t *fs = svn_fs_fs__dag_get_fs(from_node);
+      svn_fs_x__id_part_t copy_id;
+      const svn_fs_id_t *src_id = svn_fs_x__dag_get_id(from_node);
+      svn_fs_t *fs = svn_fs_x__dag_get_fs(from_node);
 
       /* Make a copy of the original node revision. */
       SVN_ERR(get_node_revision(&from_noderev, from_node));
       to_noderev = copy_node_revision(from_noderev, pool);
 
       /* Reserve a copy ID for this new copy. */
-      SVN_ERR(svn_fs_fs__reserve_copy_id(&copy_id, fs, txn_id, pool));
+      SVN_ERR(svn_fs_x__reserve_copy_id(&copy_id, fs, txn_id, pool));
 
       /* Create a successor with its predecessor pointing at the copy
          source. */
-      to_noderev->predecessor_id = svn_fs_fs__id_copy(src_id, pool);
+      to_noderev->predecessor_id = svn_fs_x__id_copy(src_id, pool);
       if (to_noderev->predecessor_count != -1)
         to_noderev->predecessor_count++;
       to_noderev->created_path =
-        svn_fspath__join(svn_fs_fs__dag_get_created_path(to_node), entry,
-                     pool);
+        svn_fspath__join(svn_fs_x__dag_get_created_path(to_node), entry,
+                         pool);
       to_noderev->copyfrom_path = apr_pstrdup(pool, from_path);
       to_noderev->copyfrom_rev = from_rev;
 
       /* Set the copyroot equal to our own id. */
       to_noderev->copyroot_path = NULL;
 
-      SVN_ERR(svn_fs_fs__create_successor(&id, fs, src_id, to_noderev,
-                                          &copy_id, txn_id, pool));
+      SVN_ERR(svn_fs_x__create_successor(&id, fs, src_id, to_noderev,
+                                         &copy_id, txn_id, pool));
 
     }
   else  /* don't preserve history */
     {
-      id = svn_fs_fs__dag_get_id(from_node);
+      id = svn_fs_x__dag_get_id(from_node);
     }
 
   /* Set the entry in to_node to the new id. */
-  return svn_fs_fs__dag_set_entry(to_node, entry, id, from_node->kind,
-                                  txn_id, pool);
+  return svn_fs_x__dag_set_entry(to_node, entry, id, from_node->kind,
+                                 txn_id, pool);
 }
 
 
@@ -1256,10 +1254,10 @@ svn_fs_fs__dag_copy(dag_node_t *to_node,
 /*** Comparison. ***/
 
 svn_error_t *
-svn_fs_fs__dag_things_different(svn_boolean_t *props_changed,
-                                svn_boolean_t *contents_changed,
-                                dag_node_t *node1,
-                                dag_node_t *node2)
+svn_fs_x__dag_things_different(svn_boolean_t *props_changed,
+                               svn_boolean_t *contents_changed,
+                               dag_node_t *node1,
+                               dag_node_t *node2)
 {
   node_revision_t *noderev1, *noderev2;
 
@@ -1274,22 +1272,22 @@ svn_fs_fs__dag_things_different(svn_bool
 
   /* Compare property keys. */
   if (props_changed != NULL)
-    *props_changed = (! svn_fs_fs__noderev_same_rep_key(noderev1->prop_rep,
-                                                        noderev2->prop_rep));
+    *props_changed = (! svn_fs_x__noderev_same_rep_key(noderev1->prop_rep,
+                                                       noderev2->prop_rep));
 
   /* Compare contents keys. */
   if (contents_changed != NULL)
     *contents_changed =
-      (! svn_fs_fs__noderev_same_rep_key(noderev1->data_rep,
-                                         noderev2->data_rep));
+      (! svn_fs_x__noderev_same_rep_key(noderev1->data_rep,
+                                        noderev2->data_rep));
 
   return SVN_NO_ERROR;
 }
 
 svn_error_t *
-svn_fs_fs__dag_get_copyroot(svn_revnum_t *rev,
-                            const char **path,
-                            dag_node_t *node)
+svn_fs_x__dag_get_copyroot(svn_revnum_t *rev,
+                           const char **path,
+                           dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -1303,8 +1301,8 @@ svn_fs_fs__dag_get_copyroot(svn_revnum_t
 }
 
 svn_error_t *
-svn_fs_fs__dag_get_copyfrom_rev(svn_revnum_t *rev,
-                                dag_node_t *node)
+svn_fs_x__dag_get_copyfrom_rev(svn_revnum_t *rev,
+                               dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -1317,8 +1315,8 @@ svn_fs_fs__dag_get_copyfrom_rev(svn_revn
 }
 
 svn_error_t *
-svn_fs_fs__dag_get_copyfrom_path(const char **path,
-                                 dag_node_t *node)
+svn_fs_x__dag_get_copyfrom_path(const char **path,
+                                dag_node_t *node)
 {
   node_revision_t *noderev;
 
@@ -1331,13 +1329,13 @@ svn_fs_fs__dag_get_copyfrom_path(const c
 }
 
 svn_error_t *
-svn_fs_fs__dag_update_ancestry(dag_node_t *target,
-                               dag_node_t *source,
-                               apr_pool_t *pool)
+svn_fs_x__dag_update_ancestry(dag_node_t *target,
+                              dag_node_t *source,
+                              apr_pool_t *pool)
 {
   node_revision_t *source_noderev, *target_noderev;
 
-  if (! svn_fs_fs__dag_check_mutable(target))
+  if (! svn_fs_x__dag_check_mutable(target))
     return svn_error_createf
       (SVN_ERR_FS_NOT_MUTABLE, NULL,
        _("Attempted to update ancestry of non-mutable node"));
@@ -1350,6 +1348,6 @@ svn_fs_fs__dag_update_ancestry(dag_node_
   if (target_noderev->predecessor_count != -1)
     target_noderev->predecessor_count++;
 
-  return svn_fs_fs__put_node_revision(target->fs, target->id, target_noderev,
-                                      FALSE, pool);
+  return svn_fs_x__put_node_revision(target->fs, target->id, target_noderev,
+                                     FALSE, pool);
 }