1 files changed, 86 insertions, 0 deletions
diff --git a/src/librbd/mirror/GetUuidRequest.cc b/src/librbd/mirror/GetUuidRequest.cc
new file mode 100644
index 000000000..f8209f905
--- /dev/null
+++ b/src/librbd/mirror/GetUuidRequest.cc
@@ -0,0 +1,86 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/mirror/GetUuidRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/Utils.h"
+
+#define dout_subsys ceph_subsys_rbd
+
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::mirror::GetUuidRequest: " \
+                           << this << " " << __func__ << ": "
+
+namespace librbd {
+namespace mirror {
+
+using librbd::util::create_rados_callback;
+
+template <typename I>
+GetUuidRequest<I>::GetUuidRequest(
+    librados::IoCtx& io_ctx, std::string* mirror_uuid, Context* on_finish)
+  : m_mirror_uuid(mirror_uuid), m_on_finish(on_finish),
+    m_cct(reinterpret_cast<CephContext*>(io_ctx.cct())) {
+  m_io_ctx.dup(io_ctx);
+  m_io_ctx.set_namespace("");
+}
+
+template <typename I>
+void GetUuidRequest<I>::send() {
+  get_mirror_uuid();
+}
+
+template <typename I>
+void GetUuidRequest<I>::get_mirror_uuid() {
+  ldout(m_cct, 20) << dendl;
+
+  librados::ObjectReadOperation op;
+  librbd::cls_client::mirror_uuid_get_start(&op);
+
+  auto aio_comp = create_rados_callback<
+    GetUuidRequest<I>, &GetUuidRequest<I>::handle_get_mirror_uuid>(this);
+  int r = m_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op, &m_out_bl);
+  ceph_assert(r == 0);
+  aio_comp->release();
+}
+
+template <typename I>
+void GetUuidRequest<I>::handle_get_mirror_uuid(int r) {
+  ldout(m_cct, 20) << "r=" << r << dendl;
+
+  if (r >= 0) {
+    auto it = m_out_bl.cbegin();
+    r = librbd::cls_client::mirror_uuid_get_finish(&it, m_mirror_uuid);
+    if (r >= 0 && m_mirror_uuid->empty()) {
+      r = -ENOENT;
+    }
+  }
+
+  if (r < 0) {
+    if (r == -ENOENT) {
+      ldout(m_cct, 5) << "mirror uuid missing" << dendl;
+    } else {
+      lderr(m_cct) << "failed to retrieve mirror uuid: " << cpp_strerror(r)
+                   << dendl;
+    }
+    *m_mirror_uuid = "";
+  }
+
+  finish(r);
+}
+
+template <typename I>
+void GetUuidRequest<I>::finish(int r) {
+  ldout(m_cct, 20) << "r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace mirror
+} // namespace librbd
+
+template class librbd::mirror::GetUuidRequest<librbd::ImageCtx>;