initial code repo

[stor4nfv.git] / src / ceph / src / librbd / mirror / PromoteRequest.cc

diff --git a/src/ceph/src/librbd/mirror/PromoteRequest.cc b/src/ceph/src/librbd/mirror/PromoteRequest.cc
new file mode 100644 (file)
index 0000000..5603cb1
--- /dev/null
+++ b/src/ceph/src/librbd/mirror/PromoteRequest.cc
@@ -0,0 +1,103 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/mirror/PromoteRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageCtx.h"
+#include "librbd/ImageState.h"
+#include "librbd/Journal.h"
+#include "librbd/Utils.h"
+#include "librbd/mirror/GetInfoRequest.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::mirror::PromoteRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace mirror {
+
+using librbd::util::create_context_callback;
+
+template <typename I>
+void PromoteRequest<I>::send() {
+  get_info();
+}
+
+template <typename I>
+void PromoteRequest<I>::get_info() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  auto ctx = create_context_callback<
+    PromoteRequest<I>, &PromoteRequest<I>::handle_get_info>(this);
+  auto req = GetInfoRequest<I>::create(m_image_ctx, &m_mirror_image,
+                                       &m_promotion_state, ctx);
+  req->send();
+}
+
+template <typename I>
+void PromoteRequest<I>::handle_get_info(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
+               << dendl;
+    finish(r);
+    return;
+  } else if (m_mirror_image.state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) {
+    lderr(cct) << "mirroring is not currently enabled" << dendl;
+    finish(-EINVAL);
+    return;
+  } else if (m_promotion_state == PROMOTION_STATE_PRIMARY) {
+    lderr(cct) << "image is already primary" << dendl;
+    finish(-EINVAL);
+    return;
+  } else if (m_promotion_state == PROMOTION_STATE_NON_PRIMARY && !m_force) {
+    lderr(cct) << "image is still primary within a remote cluster" << dendl;
+    finish(-EBUSY);
+    return;
+  }
+
+  promote();
+}
+
+template <typename I>
+void PromoteRequest<I>::promote() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  auto ctx = create_context_callback<
+    PromoteRequest<I>, &PromoteRequest<I>::handle_promote>(this);
+  Journal<I>::promote(&m_image_ctx, ctx);
+}
+
+template <typename I>
+void PromoteRequest<I>::handle_promote(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "failed to promote image: " << cpp_strerror(r)
+               << dendl;
+  }
+
+  finish(r);
+}
+
+template <typename I>
+void PromoteRequest<I>::finish(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  m_on_finish->complete(r);
+  delete this;
+}
+
+} // namespace mirror
+} // namespace librbd
+
+template class librbd::mirror::PromoteRequest<librbd::ImageCtx>;