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diff --git a/src/ceph/src/librbd/operation/MetadataSetRequest.cc b/src/ceph/src/librbd/operation/MetadataSetRequest.cc
new file mode 100644
index 0000000..0142d82
--- /dev/null
+++ b/src/ceph/src/librbd/operation/MetadataSetRequest.cc
@@ -0,0 +1,62 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/operation/MetadataSetRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "librbd/ImageCtx.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::MetadataSetRequest: "
+
+namespace librbd {
+namespace operation {
+
+template <typename I>
+MetadataSetRequest<I>::MetadataSetRequest(I &image_ctx,
+                                          Context *on_finish,
+                                          const std::string &key,
+                                          const std::string &value)
+  : Request<I>(image_ctx, on_finish), m_key(key), m_value(value) {
+}
+
+template <typename I>
+void MetadataSetRequest<I>::send_op() {
+  send_metadata_set();
+}
+
+template <typename I>
+bool MetadataSetRequest<I>::should_complete(int r) {
+  I &image_ctx = this->m_image_ctx;
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 20) << this << " " << __func__ << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
+  }
+  return true;
+}
+
+template <typename I>
+void MetadataSetRequest<I>::send_metadata_set() {
+  I &image_ctx = this->m_image_ctx;
+  assert(image_ctx.owner_lock.is_locked());
+
+  CephContext *cct = image_ctx.cct;
+  ldout(cct, 20) << this << " " << __func__ << dendl;
+
+  m_data[m_key].append(m_value);
+  librados::ObjectWriteOperation op;
+  cls_client::metadata_set(&op, m_data);
+
+  librados::AioCompletion *comp = this->create_callback_completion();
+  int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid, comp, &op);
+  assert(r == 0);
+  comp->release();
+}
+
+} // namespace operation
+} // namespace librbd
+
+template class librbd::operation::MetadataSetRequest<librbd::ImageCtx>;