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diff --git a/src/ceph/src/cls/replica_log/cls_replica_log_client.cc b/src/ceph/src/cls/replica_log/cls_replica_log_client.cc
new file mode 100644
index 0000000..13e876d
--- /dev/null
+++ b/src/ceph/src/cls/replica_log/cls_replica_log_client.cc
@@ -0,0 +1,92 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ */
+
+#include <errno.h>
+
+#include "cls/replica_log/cls_replica_log_client.h"
+#include "include/rados/librados.hpp"
+
+using namespace librados;
+
+void cls_replica_log_prepare_marker(cls_replica_log_progress_marker& progress,
+                                    const string& entity, const string& marker,
+                                    const utime_t& time,
+                                    const list<pair<string, utime_t> > *entries)
+{
+  progress.entity_id = entity;
+  progress.position_marker = marker;
+  progress.position_time = time;
+  if (entries) {
+    list<pair<string, utime_t> >::const_iterator i;
+    for (i = entries->begin(); i != entries->end(); ++i) {
+      cls_replica_log_item_marker item(i->first, i->second);
+      progress.items.push_back(item);
+    }
+  }
+}
+
+void cls_replica_log_extract_marker(const cls_replica_log_progress_marker& progress,
+                                    string& entity, string& marker,
+                                    utime_t& time,
+                                    list<pair<string, utime_t> >& entries)
+{
+  entity = progress.entity_id;
+  marker = progress.position_marker;
+  time = progress.position_time;
+  list<cls_replica_log_item_marker>::const_iterator i;
+  for (i = progress.items.begin(); i != progress.items.end(); ++i) {
+    entries.push_back(make_pair(i->item_name, i->item_timestamp));
+  }
+}
+
+void cls_replica_log_update_bound(librados::ObjectWriteOperation& o,
+                                  const cls_replica_log_progress_marker& progress)
+{
+  cls_replica_log_set_marker_op op(progress);
+  bufferlist in;
+  ::encode(op, in);
+  o.exec("replica_log", "set", in);
+}
+
+void cls_replica_log_delete_bound(librados::ObjectWriteOperation& o,
+                                  const string& entity)
+{
+  cls_replica_log_delete_marker_op op(entity);
+  bufferlist in;
+  ::encode(op, in);
+  o.exec("replica_log", "delete", in);
+}
+
+int cls_replica_log_get_bounds(librados::IoCtx& io_ctx, const string& oid,
+                                string& position_marker,
+                                utime_t& oldest_time,
+                                list<cls_replica_log_progress_marker>& markers)
+{
+  bufferlist in;
+  bufferlist out;
+  cls_replica_log_get_bounds_op op;
+  ::encode(op, in);
+  int r = io_ctx.exec(oid, "replica_log", "get", in, out);
+  if (r < 0)
+    return r;
+
+  cls_replica_log_get_bounds_ret ret;
+  try {
+    bufferlist::iterator i = out.begin();
+    ::decode(ret, i);
+  } catch (buffer::error& err) {
+    return -EIO;
+  }
+
+  position_marker = ret.position_marker;
+  oldest_time = ret.oldest_time;
+  markers = ret.markers;
+
+  return 0;
+}