X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Flibrbd%2Fmirror%2FEnableRequest.cc;fp=src%2Fceph%2Fsrc%2Flibrbd%2Fmirror%2FEnableRequest.cc;h=3a94096eb79f8eacb828fbe3d947fb4cc94a8abf;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/librbd/mirror/EnableRequest.cc b/src/ceph/src/librbd/mirror/EnableRequest.cc
new file mode 100644
index 0000000..3a94096
--- /dev/null
+++ b/src/ceph/src/librbd/mirror/EnableRequest.cc
@@ -0,0 +1,190 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "librbd/mirror/EnableRequest.h"
+#include "common/dout.h"
+#include "common/errno.h"
+#include "cls/rbd/cls_rbd_client.h"
+#include "librbd/ImageState.h"
+#include "librbd/Journal.h"
+#include "librbd/MirroringWatcher.h"
+#include "librbd/Utils.h"
+
+#define dout_subsys ceph_subsys_rbd
+#undef dout_prefix
+#define dout_prefix *_dout << "librbd::mirror::EnableRequest: "
+
+namespace librbd {
+namespace mirror {
+
+using util::create_context_callback;
+using util::create_rados_callback;
+
+template <typename I>
+EnableRequest<I>::EnableRequest(librados::IoCtx &io_ctx,
+                                const std::string &image_id,
+                                const std::string &non_primary_global_image_id,
+                                ContextWQ *op_work_queue, Context *on_finish)
+  : m_io_ctx(io_ctx), m_image_id(image_id),
+    m_non_primary_global_image_id(non_primary_global_image_id),
+    m_op_work_queue(op_work_queue), m_on_finish(on_finish),
+    m_cct(reinterpret_cast<CephContext*>(io_ctx.cct())) {
+}
+
+template <typename I>
+void EnableRequest<I>::send() {
+  send_get_tag_owner();
+}
+
+template <typename I>
+void EnableRequest<I>::send_get_tag_owner() {
+  if (!m_non_primary_global_image_id.empty()) {
+    return
+    send_get_mirror_image();
+  }
+  ldout(m_cct, 10) << this << " " << __func__ << dendl;
+
+  using klass = EnableRequest<I>;
+  Context *ctx = create_context_callback<
+      klass, &klass::handle_get_tag_owner>(this);
+  librbd::Journal<>::is_tag_owner(m_io_ctx, m_image_id, &m_is_primary,
+                                  m_op_work_queue, ctx);
+}
+
+template <typename I>
+Context *EnableRequest<I>::handle_get_tag_owner(int *result) {
+  ldout(m_cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(m_cct) << "failed to check tag ownership: " << cpp_strerror(*result)
+                 << dendl;
+    return m_on_finish;
+  }
+
+  if (!m_is_primary) {
+    lderr(m_cct) << "last journal tag not owned by local cluster" << dendl;
+    *result = -EINVAL;
+    return m_on_finish;
+  }
+
+  send_get_mirror_image();
+  return nullptr;
+}
+
+template <typename I>
+void EnableRequest<I>::send_get_mirror_image() {
+  ldout(m_cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectReadOperation op;
+  cls_client::mirror_image_get_start(&op, m_image_id);
+
+  using klass = EnableRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_get_mirror_image>(this);
+  m_out_bl.clear();
+  int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl);
+  assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+Context *EnableRequest<I>::handle_get_mirror_image(int *result) {
+  ldout(m_cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result == 0) {
+    bufferlist::iterator iter = m_out_bl.begin();
+    *result = cls_client::mirror_image_get_finish(&iter, &m_mirror_image);
+  }
+
+  if (*result == 0) {
+    if (m_mirror_image.state == cls::rbd::MIRROR_IMAGE_STATE_ENABLED) {
+      ldout(m_cct, 10) << this << " " << __func__
+                       << ": mirroring is already enabled" << dendl;
+    } else {
+      lderr(m_cct) << "currently disabling" << dendl;
+      *result = -EINVAL;
+    }
+    return m_on_finish;
+  }
+
+  if (*result != -ENOENT) {
+    lderr(m_cct) << "failed to retreive mirror image: " << cpp_strerror(*result)
+                 << dendl;
+    return m_on_finish;
+  }
+
+  *result = 0;
+  m_mirror_image.state = cls::rbd::MIRROR_IMAGE_STATE_ENABLED;
+  if (m_non_primary_global_image_id.empty()) {
+    uuid_d uuid_gen;
+    uuid_gen.generate_random();
+    m_mirror_image.global_image_id = uuid_gen.to_string();
+  } else {
+    m_mirror_image.global_image_id = m_non_primary_global_image_id;
+  }
+
+  send_set_mirror_image();
+  return nullptr;
+}
+
+template <typename I>
+void EnableRequest<I>::send_set_mirror_image() {
+  ldout(m_cct, 10) << this << " " << __func__ << dendl;
+
+  librados::ObjectWriteOperation op;
+  cls_client::mirror_image_set(&op, m_image_id, m_mirror_image);
+
+  using klass = EnableRequest<I>;
+  librados::AioCompletion *comp =
+    create_rados_callback<klass, &klass::handle_set_mirror_image>(this);
+  m_out_bl.clear();
+  int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op);
+  assert(r == 0);
+  comp->release();
+}
+
+template <typename I>
+Context *EnableRequest<I>::handle_set_mirror_image(int *result) {
+  ldout(m_cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(m_cct) << "failed to enable mirroring: " << cpp_strerror(*result)
+                 << dendl;
+    return m_on_finish;
+  }
+
+  send_notify_mirroring_watcher();
+  return nullptr;
+}
+
+template <typename I>
+void EnableRequest<I>::send_notify_mirroring_watcher() {
+  ldout(m_cct, 10) << this << " " << __func__ << dendl;
+
+  using klass = EnableRequest<I>;
+  Context *ctx = create_context_callback<
+    klass, &klass::handle_notify_mirroring_watcher>(this);
+
+  MirroringWatcher<>::notify_image_updated(m_io_ctx,
+                                           cls::rbd::MIRROR_IMAGE_STATE_ENABLED,
+                                           m_image_id,
+                                           m_mirror_image.global_image_id, ctx);
+}
+
+template <typename I>
+Context *EnableRequest<I>::handle_notify_mirroring_watcher(int *result) {
+  ldout(m_cct, 10) << this << " " << __func__ << ": r=" << *result << dendl;
+
+  if (*result < 0) {
+    lderr(m_cct) << "failed to send update notification: "
+                 << cpp_strerror(*result) << dendl;
+    *result = 0;
+  }
+
+  return m_on_finish;
+}
+
+} // namespace mirror
+} // namespace librbd
+
+template class librbd::mirror::EnableRequest<librbd::ImageCtx>;