From: Jason Dillaman <dillaman@redhat.com>
Date: Fri, 31 Jan 2020 04:48:41 +0000 (-0500)
Subject: rbd-mirror: stub snapshot replayer state machine
X-Git-Tag: v15.1.1~472^2~2
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=c3c580647a14c731368eec9928c3d5679d123a16;p=ceph-ci.git

rbd-mirror: stub snapshot replayer state machine

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
---

diff --git a/src/tools/rbd_mirror/CMakeLists.txt b/src/tools/rbd_mirror/CMakeLists.txt
index 5ab5d6c588f..6140e3e62ee 100644
--- a/src/tools/rbd_mirror/CMakeLists.txt
+++ b/src/tools/rbd_mirror/CMakeLists.txt
@@ -53,6 +53,7 @@ set(rbd_mirror_internal
   image_replayer/journal/SyncPointHandler.cc
   image_replayer/snapshot/CreateLocalImageRequest.cc
   image_replayer/snapshot/PrepareReplayRequest.cc
+  image_replayer/snapshot/Replayer.cc
   image_replayer/snapshot/StateBuilder.cc
   image_sync/SyncPointCreateRequest.cc
   image_sync/SyncPointPruneRequest.cc
diff --git a/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.cc b/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.cc
new file mode 100644
index 00000000000..d58e78f4d20
--- /dev/null
+++ b/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.cc
@@ -0,0 +1,95 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "Replayer.h"
+#include "common/debug.h"
+#include "common/errno.h"
+#include "common/Timer.h"
+#include "common/WorkQueue.h"
+#include "librbd/Journal.h"
+#include "librbd/Utils.h"
+#include "tools/rbd_mirror/Threads.h"
+#include "tools/rbd_mirror/Types.h"
+#include "tools/rbd_mirror/image_replayer/CloseImageRequest.h"
+#include "tools/rbd_mirror/image_replayer/ReplayerListener.h"
+#include "tools/rbd_mirror/image_replayer/Utils.h"
+#include "tools/rbd_mirror/image_replayer/snapshot/StateBuilder.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_rbd_mirror
+#undef dout_prefix
+#define dout_prefix *_dout << "rbd::mirror::image_replayer::snapshot::" \
+                           << "Replayer: " << this << " " << __func__ << ": "
+
+extern PerfCounters *g_perf_counters;
+
+namespace rbd {
+namespace mirror {
+namespace image_replayer {
+namespace snapshot {
+
+using librbd::util::create_async_context_callback;
+using librbd::util::create_context_callback;
+
+template <typename I>
+Replayer<I>::Replayer(
+    Threads<I>* threads,
+    const std::string& local_mirror_uuid,
+    StateBuilder<I>* state_builder,
+    ReplayerListener* replayer_listener)
+  : m_threads(threads),
+    m_local_mirror_uuid(local_mirror_uuid),
+    m_state_builder(state_builder),
+    m_replayer_listener(replayer_listener),
+    m_lock(ceph::make_mutex(librbd::util::unique_lock_name(
+      "rbd::mirror::image_replayer::snapshot::Replayer", this))) {
+  dout(10) << dendl;
+}
+
+template <typename I>
+Replayer<I>::~Replayer() {
+  dout(10) << dendl;
+}
+
+template <typename I>
+void Replayer<I>::init(Context* on_finish) {
+  dout(10) << dendl;
+
+  // TODO
+  m_state = STATE_REPLAYING;
+  m_threads->work_queue->queue(on_finish, 0);
+}
+
+template <typename I>
+void Replayer<I>::shut_down(Context* on_finish) {
+  dout(10) << dendl;
+
+  // TODO
+  m_state = STATE_COMPLETE;
+  m_threads->work_queue->queue(on_finish, 0);
+}
+
+template <typename I>
+void Replayer<I>::flush(Context* on_finish) {
+  dout(10) << dendl;
+
+  // TODO
+  m_threads->work_queue->queue(on_finish, 0);
+}
+
+template <typename I>
+bool Replayer<I>::get_replay_status(std::string* description,
+                                    Context* on_finish) {
+  dout(10) << dendl;
+
+  *description = "NOT IMPLEMENTED";
+  on_finish->complete(-EEXIST);
+  return true;
+}
+
+} // namespace snapshot
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+template class rbd::mirror::image_replayer::snapshot::Replayer<librbd::ImageCtx>;
diff --git a/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.h b/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.h
new file mode 100644
index 00000000000..718f78c6113
--- /dev/null
+++ b/src/tools/rbd_mirror/image_replayer/snapshot/Replayer.h
@@ -0,0 +1,123 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef RBD_MIRROR_IMAGE_REPLAYER_SNAPSHOT_REPLAYER_H
+#define RBD_MIRROR_IMAGE_REPLAYER_SNAPSHOT_REPLAYER_H
+
+#include "tools/rbd_mirror/image_replayer/Replayer.h"
+#include "common/ceph_mutex.h"
+#include <string>
+#include <type_traits>
+
+namespace librbd {
+
+struct ImageCtx;
+namespace snapshot { template <typename I> class Replay; }
+
+} // namespace librbd
+
+namespace rbd {
+namespace mirror {
+
+template <typename> struct Threads;
+
+namespace image_replayer {
+
+struct ReplayerListener;
+
+namespace snapshot {
+
+template <typename> class EventPreprocessor;
+template <typename> class ReplayStatusFormatter;
+template <typename> class StateBuilder;
+
+template <typename ImageCtxT>
+class Replayer : public image_replayer::Replayer {
+public:
+  static Replayer* create(
+      Threads<ImageCtxT>* threads,
+      const std::string& local_mirror_uuid,
+      StateBuilder<ImageCtxT>* state_builder,
+      ReplayerListener* replayer_listener) {
+    return new Replayer(threads, local_mirror_uuid, state_builder,
+                        replayer_listener);
+  }
+
+  Replayer(
+      Threads<ImageCtxT>* threads,
+      const std::string& local_mirror_uuid,
+      StateBuilder<ImageCtxT>* state_builder,
+      ReplayerListener* replayer_listener);
+  ~Replayer();
+
+  void destroy() override {
+    delete this;
+  }
+
+  void init(Context* on_finish) override;
+  void shut_down(Context* on_finish) override;
+
+  void flush(Context* on_finish) override;
+
+  bool get_replay_status(std::string* description, Context* on_finish) override;
+
+  bool is_replaying() const override {
+    std::unique_lock locker{m_lock};
+    return (m_state == STATE_REPLAYING);
+  }
+
+  bool is_resync_requested() const override {
+    std::unique_lock locker(m_lock);
+    // TODO
+    return false;
+  }
+
+  int get_error_code() const override {
+    std::unique_lock locker(m_lock);
+    // TODO
+    return 0;
+  }
+
+  std::string get_error_description() const override {
+    std::unique_lock locker(m_lock);
+    // TODO
+    return "";
+  }
+
+private:
+  // TODO
+  /**
+   * @verbatim
+   *
+   *  <init>
+   *    |
+   *    v
+   * <shutdown>
+   *
+   * @endverbatim
+   */
+
+  enum State {
+    STATE_INIT,
+    STATE_REPLAYING,
+    STATE_COMPLETE
+  };
+
+  Threads<ImageCtxT>* m_threads;
+  std::string m_local_mirror_uuid;
+  StateBuilder<ImageCtxT>* m_state_builder;
+  ReplayerListener* m_replayer_listener;
+
+  mutable ceph::mutex m_lock;
+
+  State m_state = STATE_INIT;
+};
+
+} // namespace snapshot
+} // namespace image_replayer
+} // namespace mirror
+} // namespace rbd
+
+extern template class rbd::mirror::image_replayer::snapshot::Replayer<librbd::ImageCtx>;
+
+#endif // RBD_MIRROR_IMAGE_REPLAYER_SNAPSHOT_REPLAYER_H
diff --git a/src/tools/rbd_mirror/image_replayer/snapshot/StateBuilder.cc b/src/tools/rbd_mirror/image_replayer/snapshot/StateBuilder.cc
index c52d3a611a1..78fe861b4a1 100644
--- a/src/tools/rbd_mirror/image_replayer/snapshot/StateBuilder.cc
+++ b/src/tools/rbd_mirror/image_replayer/snapshot/StateBuilder.cc
@@ -9,6 +9,7 @@
 #include "librbd/ImageCtx.h"
 #include "tools/rbd_mirror/image_replayer/snapshot/CreateLocalImageRequest.h"
 #include "tools/rbd_mirror/image_replayer/snapshot/PrepareReplayRequest.h"
+#include "tools/rbd_mirror/image_replayer/snapshot/Replayer.h"
 
 #define dout_context g_ceph_context
 #define dout_subsys ceph_subsys_rbd_mirror
@@ -94,9 +95,8 @@ image_replayer::Replayer* StateBuilder<I>::create_replayer(
    Threads<I>* threads,
     const std::string& local_mirror_uuid,
     ReplayerListener* replayer_listener) {
-  // TODO
-  ceph_assert(false);
-  return nullptr;
+  return Replayer<I>::create(
+    threads, local_mirror_uuid, this, replayer_listener);
 }
 
 } // namespace snapshot