1 files changed, 174 insertions, 0 deletions
diff --git a/src/tools/rbd_mirror/image_map/LoadRequest.cc b/src/tools/rbd_mirror/image_map/LoadRequest.cc
new file mode 100644
index 000000000..46564a160
--- /dev/null
+++ b/src/tools/rbd_mirror/image_map/LoadRequest.cc
@@ -0,0 +1,174 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "common/debug.h"
+#include "common/errno.h"
+
+#include "librbd/Utils.h"
+#include "include/rbd_types.h"
+#include "cls/rbd/cls_rbd_client.h"
+
+#include "UpdateRequest.h"
+#include "LoadRequest.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_map::LoadRequest: "   \
+                           << this << " " << __func__
+
+namespace rbd {
+namespace mirror {
+namespace image_map {
+
+static const uint32_t MAX_RETURN = 1024;
+
+using librbd::util::create_rados_callback;
+using librbd::util::create_context_callback;
+
+template<typename I>
+LoadRequest<I>::LoadRequest(librados::IoCtx &ioctx,
+                            std::map<std::string, cls::rbd::MirrorImageMap> *image_mapping,
+                            Context *on_finish)
+  : m_ioctx(ioctx),
+    m_image_mapping(image_mapping),
+    m_on_finish(on_finish) {
+}
+
+template<typename I>
+void LoadRequest<I>::send() {
+  dout(20) << dendl;
+
+  image_map_list();
+}
+
+template<typename I>
+void LoadRequest<I>::image_map_list() {
+  dout(20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_image_map_list_start(&op, m_start_after, MAX_RETURN);
+
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    LoadRequest, &LoadRequest::handle_image_map_list>(this);
+
+  m_out_bl.clear();
+  int r = m_ioctx.aio_operate(RBD_MIRROR_LEADER, aio_comp, &op, &m_out_bl);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template<typename I>
+void LoadRequest<I>::handle_image_map_list(int r) {
+  dout(20) << ": r=" << r << dendl;
+
+  std::map<std::string, cls::rbd::MirrorImageMap> image_mapping;
+  if (r == 0) {
+    auto it = m_out_bl.cbegin();
+    r = librbd::cls_client::mirror_image_map_list_finish(&it, &image_mapping);
+  }
+
+  if (r < 0) {
+    derr << ": failed to get image map: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  m_image_mapping->insert(image_mapping.begin(), image_mapping.end());
+
+  if (image_mapping.size() == MAX_RETURN) {
+    m_start_after = image_mapping.rbegin()->first;
+    image_map_list();
+    return;
+  }
+
+  mirror_image_list();
+}
+
+template<typename I>
+void LoadRequest<I>::mirror_image_list() {
+  dout(20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_image_list_start(&op, m_start_after, MAX_RETURN);
+
+  m_out_bl.clear();
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    LoadRequest<I>,
+    &LoadRequest<I>::handle_mirror_image_list>(this);
+  int r = m_ioctx.aio_operate(RBD_MIRRORING, aio_comp, &op, &m_out_bl);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template<typename I>
+void LoadRequest<I>::handle_mirror_image_list(int r) {
+  dout(20) << ": r=" << r << dendl;
+
+  std::map<std::string, std::string> ids;
+  if (r == 0) {
+    auto it = m_out_bl.cbegin();
+    r = librbd::cls_client::mirror_image_list_finish(&it, &ids);
+  }
+
+  if (r < 0 && r != -ENOENT) {
+    derr << "failed to list mirrored images: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  for (auto &id : ids) {
+    m_global_image_ids.emplace(id.second);
+  }
+
+  if (ids.size() == MAX_RETURN) {
+    m_start_after = ids.rbegin()->first;
+    mirror_image_list();
+    return;
+  }
+
+  cleanup_image_map();
+}
+
+template<typename I>
+void LoadRequest<I>::cleanup_image_map() {
+  dout(20) << dendl;
+
+  std::set<std::string> map_removals;
+
+  auto it = m_image_mapping->begin();
+  while (it != m_image_mapping->end()) {
+    if (m_global_image_ids.count(it->first) > 0) {
+      ++it;
+      continue;
+    }
+    map_removals.emplace(it->first);
+    it = m_image_mapping->erase(it);
+  }
+
+  if (map_removals.size() == 0) {
+    finish(0);
+    return;
+  }
+
+  auto ctx = create_context_callback<
+     LoadRequest<I>,
+     &LoadRequest<I>::finish>(this);
+  image_map::UpdateRequest<I> *req = image_map::UpdateRequest<I>::create(
+    m_ioctx, {}, std::move(map_removals), ctx);
+  req->send();
+}
+
+template<typename I>
+void LoadRequest<I>::finish(int r) {
+  dout(20) << ": r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace image_map
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_map::LoadRequest<librbd::ImageCtx>;