1 files changed, 23 insertions, 5 deletions

diff --git a/src/datastore/plugin_datastore.h b/src/datastore/plugin_datastore.h
index e8f433671..fa08501cc 100644
--- a/src/datastore/plugin_datastore.h
+++ b/src/datastore/plugin_datastore.h
@@ -22,10 +22,6 @@
  * @file datastore/plugin_datastore.h
  * @brief API for the database backend plugins.
  * @author Christian Grothoff
- *
- * TODO:
- * - consider defining enumeration or at least typedef
- *   for the type of "type" (instead of using uint32_t)
  */
 #ifndef PLUGIN_DATASTORE_H
 #define PLUGIN_DATASTORE_H
@@ -39,12 +35,24 @@
 
 /**
  * How many bytes of overhead will we assume per entry
- * in the SQlite DB?
+ * in any DB (for reservations)?
  */
 #define GNUNET_DATASTORE_ENTRY_OVERHEAD 256
 
 
 /**
+ * Function invoked to notify service of disk utilization
+ * changes.
+ *
+ * @param cls closure
+ * @param delta change in disk utilization, 
+ *        0 for "reset to empty"
+ */
+typedef void (*DiskUtilizationChange)(void *cls,
+                                      int delta);
+
+
+/**
  * The datastore service will pass a pointer to a struct
  * of this type as the first and only argument to the
  * entry point of each datastore plugin.
@@ -61,6 +69,16 @@ struct GNUNET_DATASTORE_PluginEnvironment
    */
   struct GNUNET_SCHEDULER_Handle *sched;
 
+  /**
+   * Function to call on disk utilization change.
+   */
+  DiskUtilizationChange duc;
+
+  /**
+   * Closure.
+   */
+  void *cls;
+
 };