initial code repo

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

diff --git a/src/ceph/src/librbd/mirror/GetInfoRequest.cc b/src/ceph/src/librbd/mirror/GetInfoRequest.cc
new file mode 100644 (file)
index 0000000..cc2f033
--- /dev/null
+++ b/src/ceph/src/librbd/mirror/GetInfoRequest.cc
@@ -0,0 +1,144 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/mirror/GetInfoRequest.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"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::mirror::GetInfoRequest: " << this \
+                           << " " << __func__ << ": "
+
+namespace librbd {
+namespace mirror {
+
+using librbd::util::create_context_callback;
+using librbd::util::create_rados_callback;
+
+template <typename I>
+void GetInfoRequest<I>::send() {
+  refresh_image();
+}
+
+template <typename I>
+void GetInfoRequest<I>::refresh_image() {
+  if (!m_image_ctx.state->is_refresh_required()) {
+    get_mirror_image();
+    return;
+  }
+
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  auto ctx = create_context_callback<
+    GetInfoRequest<I>, &GetInfoRequest<I>::handle_refresh_image>(this);
+  m_image_ctx.state->refresh(ctx);
+}
+
+template <typename I>
+void GetInfoRequest<I>::handle_refresh_image(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "failed to refresh image: " << cpp_strerror(r) << dendl;
+    finish(r);
+    return;
+  }
+
+  get_mirror_image();
+}
+
+template <typename I>
+void GetInfoRequest<I>::get_mirror_image() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::mirror_image_get_start(&op, m_image_ctx.id);
+
+  librados::AioCompletion *comp = create_rados_callback<
+    GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_mirror_image>(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 GetInfoRequest<I>::handle_get_mirror_image(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  m_mirror_image->state = cls::rbd::MIRROR_IMAGE_STATE_DISABLED;
+  *m_promotion_state = PROMOTION_STATE_NON_PRIMARY;
+  if (r == 0) {
+    bufferlist::iterator iter = m_out_bl.begin();
+    r = cls_client::mirror_image_get_finish(&iter, m_mirror_image);
+  }
+
+  if (r == -ENOENT ||
+      m_mirror_image->state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) {
+    ldout(cct, 20) << "mirroring is disabled" << dendl;
+    finish(0);
+    return;
+  } else if (r < 0) {
+    lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
+               << dendl;
+    finish(r);
+    return;
+  }
+
+  get_tag_owner();
+}
+
+template <typename I>
+void GetInfoRequest<I>::get_tag_owner() {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << dendl;
+
+  auto ctx = create_context_callback<
+    GetInfoRequest<I>, &GetInfoRequest<I>::handle_get_tag_owner>(this);
+  Journal<I>::get_tag_owner(m_image_ctx.md_ctx, m_image_ctx.id,
+                            &m_mirror_uuid, m_image_ctx.op_work_queue, ctx);
+}
+
+template <typename I>
+void GetInfoRequest<I>::handle_get_tag_owner(int r) {
+  CephContext *cct = m_image_ctx.cct;
+  ldout(cct, 20) << "r=" << r << dendl;
+
+  if (r < 0) {
+    lderr(cct) << "failed to determine tag ownership: " << cpp_strerror(r)
+               << dendl;
+    finish(r);
+    return;
+  }
+
+  if (m_mirror_uuid == Journal<>::LOCAL_MIRROR_UUID) {
+    *m_promotion_state = PROMOTION_STATE_PRIMARY;
+  } else if (m_mirror_uuid == Journal<>::ORPHAN_MIRROR_UUID) {
+    *m_promotion_state = PROMOTION_STATE_ORPHAN;
+  }
+
+  finish(0);
+}
+
+template <typename I>
+void GetInfoRequest<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::GetInfoRequest<librbd::ImageCtx>;