1 files changed, 117 insertions, 0 deletions
diff --git a/src/librbd/deep_copy/MetadataCopyRequest.cc b/src/librbd/deep_copy/MetadataCopyRequest.cc
new file mode 100644
index 000000000..c584bea54
--- /dev/null
+++ b/src/librbd/deep_copy/MetadataCopyRequest.cc
@@ -0,0 +1,117 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "MetadataCopyRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/Utils.h"
+#include "librbd/image/GetMetadataRequest.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::deep_copy::MetadataCopyRequest: " \
+                           << this << " " << __func__ << ": "
+
+namespace librbd {
+namespace deep_copy {
+
+namespace {
+
+const uint64_t MAX_METADATA_ITEMS = 128;
+
+} // anonymous namespace
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+template <typename I>
+MetadataCopyRequest<I>::MetadataCopyRequest(I *src_image_ctx, I *dst_image_ctx,
+                                            Context *on_finish)
+  : m_src_image_ctx(src_image_ctx), m_dst_image_ctx(dst_image_ctx),
+    m_on_finish(on_finish), m_cct(dst_image_ctx->cct) {
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::send() {
+  list_src_metadata();
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::list_src_metadata() {
+  ldout(m_cct, 20) << "start_key=" << m_last_metadata_key << dendl;
+
+  m_metadata.clear();
+  auto ctx = create_context_callback<
+    MetadataCopyRequest<I>,
+    &MetadataCopyRequest<I>::handle_list_src_metadata>(this);
+  auto req = image::GetMetadataRequest<I>::create(
+    m_src_image_ctx->md_ctx, m_src_image_ctx->header_oid, true, "",
+    m_last_metadata_key, MAX_METADATA_ITEMS, &m_metadata, ctx);
+  req->send();
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::handle_list_src_metadata(int r) {
+  ldout(m_cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(m_cct) << "failed to retrieve metadata: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  if (m_metadata.empty()) {
+    finish(0);
+    return;
+  }
+
+  m_last_metadata_key = m_metadata.rbegin()->first;
+  m_more_metadata = (m_metadata.size() >= MAX_METADATA_ITEMS);
+  set_dst_metadata();
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::set_dst_metadata() {
+  ldout(m_cct, 20) << "count=" << m_metadata.size() << dendl;
+
+  librados::ObjectWriteOperation op;
+  librbd::cls_client::metadata_set(&op, m_metadata);
+
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    MetadataCopyRequest<I>,
+    &MetadataCopyRequest<I>::handle_set_dst_metadata>(this);
+  m_dst_image_ctx->md_ctx.aio_operate(m_dst_image_ctx->header_oid, aio_comp,
+                                      &op);
+  aio_comp->release();
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::handle_set_dst_metadata(int r) {
+  ldout(m_cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(m_cct) << "failed to set metadata: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  if (m_more_metadata) {
+    list_src_metadata();
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void MetadataCopyRequest<I>::finish(int r) {
+  ldout(m_cct, 20) << "r=" << r << dendl;
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace deep_copy
+} // namespace librbd
+
+template class librbd::deep_copy::MetadataCopyRequest<librbd::ImageCtx>;