initial code repo

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

diff --git a/src/ceph/src/librbd/mirror/GetStatusRequest.cc b/src/ceph/src/librbd/mirror/GetStatusRequest.cc
new file mode 100644 (file)
index 0000000..b21a16a
--- /dev/null
+++ b/src/ceph/src/librbd/mirror/GetStatusRequest.cc
@@ -0,0 +1,112 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/mirror/GetStatusRequest.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::GetStatusRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace mirror {
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+template <typename I>
+void GetStatusRequest<I>::send() {
+  *m_mirror_image_status = cls::rbd::MirrorImageStatus(
+    cls::rbd::MIRROR_IMAGE_STATUS_STATE_UNKNOWN, "status not found");
+
+  get_info();
+}
+
+template <typename I>
+void GetStatusRequest<I>::get_info() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  auto ctx = create_context_callback<
+    GetStatusRequest<I>, &GetStatusRequest<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 GetStatusRequest<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) {
+    finish(0);
+    return;
+  }
+
+  get_status();
+}
+
+template <typename I>
+void GetStatusRequest<I>::get_status() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::mirror_image_status_get_start(
+    &op, m_mirror_image->global_image_id);
+
+  librados::AioCompletion *comp = create_rados_callback<
+    GetStatusRequest<I>, &GetStatusRequest<I>::handle_get_status>(this);
+  int r = m_image_ctx.md_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl);
+  assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+void GetStatusRequest<I>::handle_get_status(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r == 0) {
+    bufferlist::iterator iter = m_out_bl.begin();
+    r = cls_client::mirror_image_status_get_finish(&iter,
+                                                   m_mirror_image_status);
+  }
+
+  if (r < 0 && r != -ENOENT) {
+    lderr(cct) << "failed to retrieve mirror image status: " << cpp_strerror(r)
+               << dendl;
+    finish(r);
+    return;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void GetStatusRequest<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::GetStatusRequest<librbd::ImageCtx>;