--- /dev/null
+// -*- 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>;
Code Review / stor4nfv.git / blobdiff