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-rw-r--r--src/librbd/mirror/GetUuidRequest.cc86
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>;