initial code repo

[stor4nfv.git] / src / ceph / src / tools / rbd_mirror / image_replayer / PrepareRemoteImageRequest.cc

diff --git a/src/ceph/src/tools/rbd_mirror/image_replayer/PrepareRemoteImageRequest.cc b/src/ceph/src/tools/rbd_mirror/image_replayer/PrepareRemoteImageRequest.cc
new file mode 100644 (file)
index 0000000..2e62093
--- /dev/null
+++ b/src/ceph/src/tools/rbd_mirror/image_replayer/PrepareRemoteImageRequest.cc
@@ -0,0 +1,108 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "tools/rbd_mirror/image_replayer/PrepareRemoteImageRequest.h"
+#include "include/rados/librados.hpp"
+#include "cls/rbd/cls_rbd_client.h"
+#include "common/errno.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+#include "tools/rbd_mirror/image_replayer/GetMirrorImageIdRequest.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_replayer::" \
+                           << "PrepareRemoteImageRequest: " << this << " " \
+                           << __func__ << ": "
+
+namespace rbd {
+namespace mirror {
+namespace image_replayer {
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::send() {
+  get_remote_mirror_uuid();
+}
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::get_remote_mirror_uuid() {
+  dout(20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_uuid_get_start(&op);
+
+  librados::AioCompletion *aio_comp = create_rados_callback<
+    PrepareRemoteImageRequest<I>,
+    &PrepareRemoteImageRequest<I>::handle_get_remote_mirror_uuid>(this);
+  int r = m_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op, &m_out_bl);
+  assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::handle_get_remote_mirror_uuid(int r) {
+  if (r >= 0) {
+    bufferlist::iterator it = m_out_bl.begin();
+    r = librbd::cls_client::mirror_uuid_get_finish(&it, m_remote_mirror_uuid);
+    if (r >= 0 && m_remote_mirror_uuid->empty()) {
+      r = -ENOENT;
+    }
+  }
+
+  dout(20) << "r=" << r << dendl;
+  if (r < 0) {
+    if (r == -ENOENT) {
+      dout(5) << "remote mirror uuid missing" << dendl;
+    } else {
+      derr << "failed to retrieve remote mirror uuid: " << cpp_strerror(r)
+           << dendl;
+    }
+    finish(r);
+    return;
+  }
+
+  get_remote_image_id();
+}
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::get_remote_image_id() {
+  dout(20) << dendl;
+
+  Context *ctx = create_context_callback<
+    PrepareRemoteImageRequest<I>,
+    &PrepareRemoteImageRequest<I>::handle_get_remote_image_id>(this);
+  auto req = GetMirrorImageIdRequest<I>::create(m_io_ctx, m_global_image_id,
+                                                m_remote_image_id, ctx);
+  req->send();
+}
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::handle_get_remote_image_id(int r) {
+  dout(20) << "r=" << r << ", "
+           << "remote_image_id=" << *m_remote_image_id << dendl;
+
+  if (r < 0) {
+    finish(r);
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void PrepareRemoteImageRequest<I>::finish(int r) {
+  dout(20) << "r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_replayer::PrepareRemoteImageRequest<librbd::ImageCtx>;