// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
 * Ceph distributed storage system
 *
 * Copyright (C) 2016 Mirantis Inc
 *
 * Author: Mykola Golub <mgolub@mirantis.com>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 */

#include "include/rados/librados.hpp"
#include "include/rbd/librbd.hpp"
#include "include/stringify.h"
#include "test/librbd/test_support.h"
#include "test/rbd_mirror/test_fixture.h"
#include "cls/journal/cls_journal_types.h"
#include "cls/journal/cls_journal_client.h"
#include "cls/rbd/cls_rbd_types.h"
#include "cls/rbd/cls_rbd_client.h"
#include "journal/Journaler.h"
#include "librbd/ExclusiveLock.h"
#include "librbd/ImageCtx.h"
#include "librbd/ImageState.h"
#include "librbd/Journal.h"
#include "librbd/Operations.h"
#include "librbd/Utils.h"
#include "librbd/internal.h"
#include "librbd/api/Io.h"
#include "librbd/api/Mirror.h"
#include "librbd/api/Snapshot.h"
#include "librbd/io/AioCompletion.h"
#include "librbd/io/ReadResult.h"
#include "tools/rbd_mirror/ImageReplayer.h"
#include "tools/rbd_mirror/InstanceWatcher.h"
#include "tools/rbd_mirror/MirrorStatusUpdater.h"
#include "tools/rbd_mirror/PoolMetaCache.h"
#include "tools/rbd_mirror/Threads.h"
#include "tools/rbd_mirror/Throttler.h"
#include "tools/rbd_mirror/Types.h"

#include "test/librados/test_cxx.h"
#include "gtest/gtest.h"

void register_test_rbd_mirror() {
}

#define TEST_IO_SIZE 512
#define TEST_IO_COUNT 11

namespace rbd {
namespace mirror {

template <typename T>
class TestImageReplayer : public TestFixture {
public:
  static const cls::rbd::MirrorImageMode MIRROR_IMAGE_MODE =
    T::MIRROR_IMAGE_MODE;
  static const uint64_t FEATURES = T::FEATURES;

  struct C_WatchCtx : public librados::WatchCtx2 {
    TestImageReplayer *test;
    std::string oid;
    ceph::mutex lock = ceph::make_mutex("C_WatchCtx::lock");
    ceph::condition_variable cond;
    bool notified;

    C_WatchCtx(TestImageReplayer *test, const std::string &oid)
      : test(test), oid(oid), notified(false) {
    }

    void handle_notify(uint64_t notify_id, uint64_t cookie,
                               uint64_t notifier_id, bufferlist& bl_) override {
      bufferlist bl;
      test->m_remote_ioctx.notify_ack(oid, notify_id, cookie, bl);

      std::lock_guard locker{lock};
      notified = true;
      cond.notify_all();
    }

    void handle_error(uint64_t cookie, int err) override {
      ASSERT_EQ(0, err);
    }
  };

  TestImageReplayer()
    : m_local_cluster(new librados::Rados()), m_watch_handle(0)
  {
    EXPECT_EQ("", connect_cluster_pp(*m_local_cluster.get()));
    EXPECT_EQ(0, m_local_cluster->conf_set("rbd_cache", "false"));
    EXPECT_EQ(0, m_local_cluster->conf_set("rbd_mirror_journal_poll_age", "1"));
    EXPECT_EQ(0, m_local_cluster->conf_set("rbd_mirror_journal_commit_age",
                                           "0.1"));
    m_local_pool_name = get_temp_pool_name();
    EXPECT_EQ(0, m_local_cluster->pool_create(m_local_pool_name.c_str()));
    EXPECT_EQ(0, m_local_cluster->ioctx_create(m_local_pool_name.c_str(),
					      m_local_ioctx));
    m_local_ioctx.application_enable("rbd", true);

    EXPECT_EQ("", connect_cluster_pp(m_remote_cluster));
    EXPECT_EQ(0, m_remote_cluster.conf_set("rbd_cache", "false"));

    m_remote_pool_name = get_temp_pool_name();
    EXPECT_EQ(0, m_remote_cluster.pool_create(m_remote_pool_name.c_str()));
    m_remote_pool_id = m_remote_cluster.pool_lookup(m_remote_pool_name.c_str());
    EXPECT_GE(m_remote_pool_id, 0);

    EXPECT_EQ(0, m_remote_cluster.ioctx_create(m_remote_pool_name.c_str(),
					       m_remote_ioctx));
    m_remote_ioctx.application_enable("rbd", true);

    // make snap id debugging easier when local/remote have different mappings
    uint64_t snap_id;
    EXPECT_EQ(0, m_remote_ioctx.selfmanaged_snap_create(&snap_id));

    uint64_t features = FEATURES;
    if (MIRROR_IMAGE_MODE == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
      EXPECT_EQ(0, librbd::api::Mirror<>::mode_set(m_remote_ioctx,
                                                   RBD_MIRROR_MODE_POOL));
      EXPECT_EQ(0, librbd::api::Mirror<>::mode_set(m_local_ioctx,
                                                   RBD_MIRROR_MODE_POOL));
    } else {
      EXPECT_EQ(0, librbd::api::Mirror<>::mode_set(m_remote_ioctx,
                                                   RBD_MIRROR_MODE_IMAGE));
      EXPECT_EQ(0, librbd::api::Mirror<>::mode_set(m_local_ioctx,
                                                   RBD_MIRROR_MODE_IMAGE));


      uuid_d uuid_gen;
      uuid_gen.generate_random();
      std::string remote_peer_uuid = uuid_gen.to_string();

      EXPECT_EQ(0, librbd::cls_client::mirror_peer_add(
        &m_remote_ioctx, {remote_peer_uuid,
                          cls::rbd::MIRROR_PEER_DIRECTION_RX_TX,
                          "siteA", "client", m_local_mirror_uuid}));

      m_pool_meta_cache.set_remote_pool_meta(
        m_remote_ioctx.get_id(), {m_remote_mirror_uuid, remote_peer_uuid});
    }

    EXPECT_EQ(0, librbd::api::Mirror<>::uuid_get(m_remote_ioctx,
                                                 &m_remote_mirror_uuid));
    EXPECT_EQ(0, librbd::api::Mirror<>::uuid_get(m_local_ioctx,
                                                 &m_local_mirror_uuid));

    m_image_name = get_temp_image_name();
    int order = 0;
    EXPECT_EQ(0, librbd::create(m_remote_ioctx, m_image_name.c_str(), 1 << 22,
				false, features, &order, 0, 0));

    if (MIRROR_IMAGE_MODE != cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
      librbd::ImageCtx* remote_image_ctx;
      open_remote_image(&remote_image_ctx);
      EXPECT_EQ(0,
                librbd::api::Mirror<>::image_enable(
                  remote_image_ctx,
                  static_cast<rbd_mirror_image_mode_t>(MIRROR_IMAGE_MODE),
                  false));
      close_image(remote_image_ctx);
    }

    m_remote_image_id = get_image_id(m_remote_ioctx, m_image_name);
    m_global_image_id = get_global_image_id(m_remote_ioctx, m_remote_image_id);

    auto cct = reinterpret_cast<CephContext*>(m_local_ioctx.cct());
    m_threads.reset(new Threads<>(m_local_cluster));

    m_image_sync_throttler.reset(new Throttler<>(
        cct, "rbd_mirror_concurrent_image_syncs"));

    m_instance_watcher = InstanceWatcher<>::create(
        m_local_ioctx, *m_threads->asio_engine, nullptr,
        m_image_sync_throttler.get());
    m_instance_watcher->handle_acquire_leader();

    EXPECT_EQ(0, m_local_ioctx.create(RBD_MIRRORING, false));

    m_local_status_updater = MirrorStatusUpdater<>::create(
      m_local_ioctx, m_threads.get(), "");
    C_SaferCond status_updater_ctx;
    m_local_status_updater->init(&status_updater_ctx);
    EXPECT_EQ(0, status_updater_ctx.wait());
  }

  ~TestImageReplayer() override
  {
    unwatch();

    m_instance_watcher->handle_release_leader();

    delete m_replayer;
    delete m_instance_watcher;

    C_SaferCond status_updater_ctx;
    m_local_status_updater->shut_down(&status_updater_ctx);
    EXPECT_EQ(0, status_updater_ctx.wait());
    delete m_local_status_updater;

    EXPECT_EQ(0, m_remote_cluster.pool_delete(m_remote_pool_name.c_str()));
    EXPECT_EQ(0, m_local_cluster->pool_delete(m_local_pool_name.c_str()));
  }

  void create_replayer() {
    m_replayer = new ImageReplayer<>(m_local_ioctx, m_local_mirror_uuid,
                                     m_global_image_id, m_threads.get(),
                                     m_instance_watcher, m_local_status_updater,
                                     nullptr, &m_pool_meta_cache);
    m_replayer->add_peer({"peer uuid", m_remote_ioctx,
                         {m_remote_mirror_uuid, "remote mirror peer uuid"},
                         nullptr});
  }

  void start()
  {
    C_SaferCond cond;
    m_replayer->start(&cond);
    ASSERT_EQ(0, cond.wait());

    create_watch_ctx();
  }

  void create_watch_ctx() {
    std::string oid;
    if (MIRROR_IMAGE_MODE == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
      oid = ::journal::Journaler::header_oid(m_remote_image_id);
    } else {
      oid = librbd::util::header_name(m_remote_image_id);
    }

    ASSERT_EQ(0U, m_watch_handle);
    ASSERT_TRUE(m_watch_ctx == nullptr);
    m_watch_ctx = new C_WatchCtx(this, oid);
    ASSERT_EQ(0, m_remote_ioctx.watch2(oid, &m_watch_handle, m_watch_ctx));
  }

  void unwatch() {
    if (m_watch_handle != 0) {
      m_remote_ioctx.unwatch2(m_watch_handle);
      delete m_watch_ctx;
      m_watch_ctx = nullptr;
      m_watch_handle = 0;
    }
  }

  void stop()
  {
    unwatch();

    C_SaferCond cond;
    m_replayer->stop(&cond);
    ASSERT_EQ(0, cond.wait());
  }

  void bootstrap()
  {
    create_replayer();

    start();
    wait_for_replay_complete();
    stop();
  }

  std::string  get_temp_image_name()
  {
    return "image" + stringify(++_image_number);
  }

  std::string get_image_id(librados::IoCtx &ioctx, const string &image_name)
  {
    std::string obj = librbd::util::id_obj_name(image_name);
    std::string id;
    EXPECT_EQ(0, librbd::cls_client::get_id(&ioctx, obj, &id));
    return id;
  }

  std::string get_global_image_id(librados::IoCtx& io_ctx,
                                  const std::string& image_id) {
    cls::rbd::MirrorImage mirror_image;
    EXPECT_EQ(0, librbd::cls_client::mirror_image_get(&io_ctx, image_id,
                                                      &mirror_image));
    return mirror_image.global_image_id;
  }

  void open_image(librados::IoCtx &ioctx, const std::string &image_name,
		  bool readonly, librbd::ImageCtx **ictxp)
  {
    librbd::ImageCtx *ictx = new librbd::ImageCtx(image_name.c_str(),
						  "", "", ioctx, readonly);
    EXPECT_EQ(0, ictx->state->open(0));
    *ictxp = ictx;
  }

  void open_local_image(librbd::ImageCtx **ictxp)
  {
    open_image(m_local_ioctx, m_image_name, true, ictxp);
  }

  void open_remote_image(librbd::ImageCtx **ictxp)
  {
    open_image(m_remote_ioctx, m_image_name, false, ictxp);
  }

  void close_image(librbd::ImageCtx *ictx)
  {
    ictx->state->close();
  }

  void get_commit_positions(cls::journal::ObjectPosition *master_position,
			    cls::journal::ObjectPosition *mirror_position)
  {
    std::string master_client_id = "";
    std::string mirror_client_id = m_local_mirror_uuid;

    m_replayer->flush();

    C_SaferCond cond;
    uint64_t minimum_set;
    uint64_t active_set;
    std::set<cls::journal::Client> registered_clients;
    std::string oid = ::journal::Journaler::header_oid(m_remote_image_id);
    cls::journal::client::get_mutable_metadata(m_remote_ioctx, oid,
					       &minimum_set, &active_set,
					       &registered_clients, &cond);
    ASSERT_EQ(0, cond.wait());

    *master_position = cls::journal::ObjectPosition();
    *mirror_position = cls::journal::ObjectPosition();

    std::set<cls::journal::Client>::const_iterator c;
    for (c = registered_clients.begin(); c != registered_clients.end(); ++c) {
      std::cout << __func__ << ": client: " << *c << std::endl;
      if (c->state != cls::journal::CLIENT_STATE_CONNECTED) {
	continue;
      }
      cls::journal::ObjectPositions object_positions =
	c->commit_position.object_positions;
      cls::journal::ObjectPositions::const_iterator p =
	object_positions.begin();
      if (p != object_positions.end()) {
	if (c->id == master_client_id) {
	  ASSERT_EQ(cls::journal::ObjectPosition(), *master_position);
	  *master_position = *p;
	} else if (c->id == mirror_client_id) {
	  ASSERT_EQ(cls::journal::ObjectPosition(), *mirror_position);
	  *mirror_position = *p;
	}
      }
    }
  }

  bool wait_for_watcher_notify(int seconds)
  {
    if (m_watch_handle == 0) {
      return false;
    }

    std::unique_lock locker{m_watch_ctx->lock};
    while (!m_watch_ctx->notified) {
      if (m_watch_ctx->cond.wait_for(locker,
				     std::chrono::seconds(seconds)) ==
	  std::cv_status::timeout) {
        return false;
      }
    }
    m_watch_ctx->notified = false;
    return true;
  }

  int get_last_mirror_snapshot(librados::IoCtx& io_ctx,
                               const std::string& image_id,
                               uint64_t* mirror_snap_id,
                               cls::rbd::MirrorSnapshotNamespace* mirror_ns) {
    auto header_oid = librbd::util::header_name(image_id);
    ::SnapContext snapc;
    int r = librbd::cls_client::get_snapcontext(&io_ctx, header_oid, &snapc);
    if (r < 0) {
      return r;
    }

    // stored in reverse order
    for (auto snap_id : snapc.snaps) {
      cls::rbd::SnapshotInfo snap_info;
      r = librbd::cls_client::snapshot_get(&io_ctx, header_oid, snap_id,
                                           &snap_info);
      if (r < 0) {
        return r;
      }

      auto ns = boost::get<cls::rbd::MirrorSnapshotNamespace>(
        &snap_info.snapshot_namespace);
      if (ns != nullptr) {
        *mirror_snap_id = snap_id;
        *mirror_ns = *ns;
        return 0;
      }
    }

    return -ENOENT;
  }

  void wait_for_journal_synced() {
    cls::journal::ObjectPosition master_position;
    cls::journal::ObjectPosition mirror_position;
    for (int i = 0; i < 100; i++) {
      get_commit_positions(&master_position, &mirror_position);
      if (master_position == mirror_position) {
        break;
      }
      wait_for_watcher_notify(1);
    }

    ASSERT_EQ(master_position, mirror_position);
  }

  void wait_for_snapshot_synced() {
    uint64_t remote_snap_id = CEPH_NOSNAP;
    cls::rbd::MirrorSnapshotNamespace remote_mirror_ns;
    ASSERT_EQ(0, get_last_mirror_snapshot(m_remote_ioctx, m_remote_image_id,
                                          &remote_snap_id, &remote_mirror_ns));

    std::cout << "remote_snap_id=" << remote_snap_id << std::endl;

    std::string local_image_id;
    ASSERT_EQ(0, librbd::cls_client::mirror_image_get_image_id(
                   &m_local_ioctx, m_global_image_id, &local_image_id));

    uint64_t local_snap_id = CEPH_NOSNAP;
    cls::rbd::MirrorSnapshotNamespace local_mirror_ns;
    for (int i = 0; i < 100; i++) {
      int r = get_last_mirror_snapshot(m_local_ioctx, local_image_id,
                                       &local_snap_id, &local_mirror_ns);
      if (r == 0 &&
          ((remote_mirror_ns.state ==
              cls::rbd::MIRROR_SNAPSHOT_STATE_PRIMARY &&
            local_mirror_ns.state ==
              cls::rbd::MIRROR_SNAPSHOT_STATE_NON_PRIMARY) ||
           (remote_mirror_ns.state ==
              cls::rbd::MIRROR_SNAPSHOT_STATE_PRIMARY_DEMOTED &&
            local_mirror_ns.state ==
              cls::rbd::MIRROR_SNAPSHOT_STATE_NON_PRIMARY_DEMOTED)) &&
          local_mirror_ns.primary_mirror_uuid == m_remote_mirror_uuid &&
          local_mirror_ns.primary_snap_id == remote_snap_id &&
          local_mirror_ns.complete) {

        std::cout << "local_snap_id=" << local_snap_id << ", "
                  << "local_snap_ns=" << local_mirror_ns << std::endl;
        return;
      }

      wait_for_watcher_notify(1);
    }

    ADD_FAILURE() << "failed to locate matching snapshot: "
                  << "remote_snap_id=" << remote_snap_id << ", "
                  << "remote_snap_ns=" << remote_mirror_ns << ", "
                  << "local_snap_id=" << local_snap_id << ", "
                  << "local_snap_ns=" << local_mirror_ns;
  }

  void wait_for_replay_complete()
  {
    if (MIRROR_IMAGE_MODE == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
      wait_for_journal_synced();
    } else {
      wait_for_snapshot_synced();
    }
  }

  void wait_for_stopped() {
    for (int i = 0; i < 100; i++) {
      if (m_replayer->is_stopped()) {
        break;
      }
      wait_for_watcher_notify(1);
    }
    ASSERT_TRUE(m_replayer->is_stopped());
  }

  void write_test_data(librbd::ImageCtx *ictx, const char *test_data, off_t off,
                       size_t len)
  {
    size_t written;
    bufferlist bl;
    bl.append(std::string(test_data, len));
    written = librbd::api::Io<>::write(*ictx, off, len, std::move(bl), 0);
    printf("wrote: %d\n", (int)written);
    ASSERT_EQ(len, written);
  }

  void read_test_data(librbd::ImageCtx *ictx, const char *expected, off_t off,
                      size_t len)
  {
    ssize_t read;
    char *result = (char *)malloc(len + 1);

    ASSERT_NE(static_cast<char *>(NULL), result);
    read = librbd::api::Io<>::read(
      *ictx, off, len, librbd::io::ReadResult{result, len}, 0);
    printf("read: %d\n", (int)read);
    ASSERT_EQ(len, static_cast<size_t>(read));
    result[len] = '\0';
    if (memcmp(result, expected, len)) {
      printf("read: %s\nexpected: %s\n", result, expected);
      ASSERT_EQ(0, memcmp(result, expected, len));
    }
    free(result);
  }

  void generate_test_data() {
    for (int i = 0; i < TEST_IO_SIZE; ++i) {
      m_test_data[i] = (char) (rand() % (126 - 33) + 33);
    }
    m_test_data[TEST_IO_SIZE] = '\0';
  }

  void flush(librbd::ImageCtx *ictx)
  {
    C_SaferCond aio_flush_ctx;
    auto c = librbd::io::AioCompletion::create(&aio_flush_ctx);
    c->get();
    librbd::api::Io<>::aio_flush(*ictx, c, true);
    ASSERT_EQ(0, c->wait_for_complete());
    c->put();

    if (MIRROR_IMAGE_MODE == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
      C_SaferCond journal_flush_ctx;
      ictx->journal->flush_commit_position(&journal_flush_ctx);
      ASSERT_EQ(0, journal_flush_ctx.wait());
    } else {
      uint64_t snap_id = CEPH_NOSNAP;
      ASSERT_EQ(0, librbd::api::Mirror<>::image_snapshot_create(
                  ictx, 0, &snap_id));
    }

    printf("flushed\n");
  }

  static int _image_number;

  PoolMetaCache m_pool_meta_cache{g_ceph_context};

  std::shared_ptr<librados::Rados> m_local_cluster;
  std::unique_ptr<Threads<>> m_threads;
  std::unique_ptr<Throttler<>> m_image_sync_throttler;
  librados::Rados m_remote_cluster;
  InstanceWatcher<> *m_instance_watcher;
  MirrorStatusUpdater<> *m_local_status_updater;
  std::string m_local_mirror_uuid = "local mirror uuid";
  std::string m_remote_mirror_uuid = "remote mirror uuid";
  std::string m_local_pool_name, m_remote_pool_name;
  librados::IoCtx m_local_ioctx, m_remote_ioctx;
  std::string m_image_name;
  int64_t m_remote_pool_id;
  std::string m_remote_image_id;
  std::string m_global_image_id;
  ImageReplayer<> *m_replayer = nullptr;
  C_WatchCtx *m_watch_ctx = nullptr;
  uint64_t m_watch_handle = 0;
  char m_test_data[TEST_IO_SIZE + 1];
  std::string m_journal_commit_age;
};

template <typename T>
int TestImageReplayer<T>::_image_number;

template <cls::rbd::MirrorImageMode _mirror_image_mode, uint64_t _features>
class TestImageReplayerParams {
public:
  static const cls::rbd::MirrorImageMode MIRROR_IMAGE_MODE = _mirror_image_mode;
  static const uint64_t FEATURES = _features;
};

typedef ::testing::Types<TestImageReplayerParams<
                           cls::rbd::MIRROR_IMAGE_MODE_JOURNAL, 125>,
                         TestImageReplayerParams<
                           cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT, 1>,
                         TestImageReplayerParams<
                           cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT, 5>,
                         TestImageReplayerParams<
                           cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT, 61>,
                         TestImageReplayerParams<
                           cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT, 125>>
    TestImageReplayerTypes;

TYPED_TEST_SUITE(TestImageReplayer, TestImageReplayerTypes);

TYPED_TEST(TestImageReplayer, Bootstrap)
{
  this->bootstrap();
}

typedef TestImageReplayer<TestImageReplayerParams<
    cls::rbd::MIRROR_IMAGE_MODE_JOURNAL, 125>> TestImageReplayerJournal;

TYPED_TEST(TestImageReplayer, BootstrapErrorLocalImageExists)
{
  int order = 0;
  EXPECT_EQ(0, librbd::create(this->m_local_ioctx, this->m_image_name.c_str(),
                              1 << 22, false, 0, &order, 0, 0));

  this->create_replayer();
  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(-EEXIST, cond.wait());
}

TEST_F(TestImageReplayerJournal, BootstrapErrorNoJournal)
{
  ASSERT_EQ(0, librbd::Journal<>::remove(this->m_remote_ioctx,
                                         this->m_remote_image_id));

  this->create_replayer();
  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(-ENOENT, cond.wait());
}

TYPED_TEST(TestImageReplayer, BootstrapErrorMirrorDisabled)
{
  // disable remote image mirroring
  ASSERT_EQ(0, librbd::api::Mirror<>::mode_set(this->m_remote_ioctx,
                                               RBD_MIRROR_MODE_IMAGE));
  librbd::ImageCtx *ictx;
  this->open_remote_image(&ictx);
  ASSERT_EQ(0, librbd::api::Mirror<>::image_disable(ictx, true));
  this->close_image(ictx);

  this->create_replayer();
  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(-ENOENT, cond.wait());
}

TYPED_TEST(TestImageReplayer, BootstrapMirrorDisabling)
{
  // set remote image mirroring state to DISABLING
  if (gtest_TypeParam_::MIRROR_IMAGE_MODE ==
        cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
    ASSERT_EQ(0, librbd::api::Mirror<>::mode_set(this->m_remote_ioctx,
                                                 RBD_MIRROR_MODE_IMAGE));
    librbd::ImageCtx *ictx;
    this->open_remote_image(&ictx);
     ASSERT_EQ(0, librbd::api::Mirror<>::image_enable(
                   ictx, RBD_MIRROR_IMAGE_MODE_JOURNAL, false));
    this->close_image(ictx);
  }

  cls::rbd::MirrorImage mirror_image;
  ASSERT_EQ(0, librbd::cls_client::mirror_image_get(&this->m_remote_ioctx,
                                                    this->m_remote_image_id,
                                                    &mirror_image));
  mirror_image.state = cls::rbd::MirrorImageState::MIRROR_IMAGE_STATE_DISABLING;
  ASSERT_EQ(0, librbd::cls_client::mirror_image_set(&this->m_remote_ioctx,
                                                    this->m_remote_image_id,
                                                    mirror_image));

  this->create_replayer();
  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(-ENOENT, cond.wait());
  ASSERT_TRUE(this->m_replayer->is_stopped());
}

TYPED_TEST(TestImageReplayer, BootstrapDemoted)
{
  // demote remote image
  librbd::ImageCtx *ictx;
  this->open_remote_image(&ictx);
  ASSERT_EQ(0, librbd::api::Mirror<>::image_demote(ictx));
  this->close_image(ictx);

  this->create_replayer();
  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(-EREMOTEIO, cond.wait());
  ASSERT_TRUE(this->m_replayer->is_stopped());
}

TYPED_TEST(TestImageReplayer, StartInterrupted)
{
  this->create_replayer();
  C_SaferCond start_cond, stop_cond;
  this->m_replayer->start(&start_cond);
  this->m_replayer->stop(&stop_cond);
  int r = start_cond.wait();
  printf("start returned %d\n", r);
  // TODO: improve the test to avoid this race
  ASSERT_TRUE(r == -ECANCELED || r == 0);
  ASSERT_EQ(0, stop_cond.wait());
}

TEST_F(TestImageReplayerJournal, JournalReset)
{
  this->bootstrap();
  delete this->m_replayer;

  ASSERT_EQ(0, librbd::Journal<>::reset(this->m_remote_ioctx,
                                        this->m_remote_image_id));

  // try to recover
  this->bootstrap();
}

TEST_F(TestImageReplayerJournal, ErrorNoJournal)
{
  this->bootstrap();

  // disable remote journal journaling
  // (reset before disabling, so it does not fail with EBUSY)
  ASSERT_EQ(0, librbd::Journal<>::reset(this->m_remote_ioctx,
                                        this->m_remote_image_id));
  librbd::ImageCtx *ictx;
  this->open_remote_image(&ictx);
  uint64_t features;
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0, ictx->operations->update_features(RBD_FEATURE_JOURNALING,
                                                 false));
  this->close_image(ictx);

  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(0, cond.wait());
}

TYPED_TEST(TestImageReplayer, StartStop)
{
  this->bootstrap();

  this->start();
  this->wait_for_replay_complete();
  this->stop();
}

TYPED_TEST(TestImageReplayer, WriteAndStartReplay)
{
  this->bootstrap();

  // Write to remote image and start replay

  librbd::ImageCtx *ictx;

  this->generate_test_data();
  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->start();
  this->wait_for_replay_complete();
  this->stop();

  this->open_local_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);
}

TYPED_TEST(TestImageReplayer, StartReplayAndWrite)
{
  this->bootstrap();

  // Start replay and write to remote image

  librbd::ImageCtx *ictx;

  this->start();

  this->generate_test_data();
  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);

  this->wait_for_replay_complete();

  for (int i = TEST_IO_COUNT; i < 2 * TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < 2 * TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TEST_F(TestImageReplayerJournal, NextTag)
{
  this->bootstrap();

  // write, reopen, and write again to test switch to the next tag

  librbd::ImageCtx *ictx;

  this->start();

  this->generate_test_data();

  const int N = 10;

  for (int j = 0; j < N; j++) {
    this->open_remote_image(&ictx);
    for (int i = j * TEST_IO_COUNT; i < (j + 1) * TEST_IO_COUNT; ++i) {
      this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                            TEST_IO_SIZE);
    }
    this->close_image(ictx);
  }

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < N * TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TYPED_TEST(TestImageReplayer, Resync)
{
  this->bootstrap();

  librbd::ImageCtx *ictx;

  this->start();

  this->generate_test_data();

  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);

  this->wait_for_replay_complete();

  for (int i = TEST_IO_COUNT; i < 2 * TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->open_local_image(&ictx);
  EXPECT_EQ(0, librbd::api::Mirror<>::image_resync(ictx));
  this->close_image(ictx);

  this->wait_for_stopped();

  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(0, cond.wait());

  ASSERT_TRUE(this->m_replayer->is_replaying());
  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < 2 * TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TYPED_TEST(TestImageReplayer, Resync_While_Stop)
{
  this->bootstrap();

  this->start();

  this->generate_test_data();

  librbd::ImageCtx *ictx;
  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);

  this->wait_for_replay_complete();

  for (int i = TEST_IO_COUNT; i < 2 * TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  C_SaferCond cond;
  this->m_replayer->stop(&cond);
  ASSERT_EQ(0, cond.wait());

  this->open_local_image(&ictx);
  EXPECT_EQ(0, librbd::api::Mirror<>::image_resync(ictx));
  this->close_image(ictx);

  C_SaferCond cond2;
  this->m_replayer->start(&cond2);
  ASSERT_EQ(0, cond2.wait());

  ASSERT_TRUE(this->m_replayer->is_stopped());

  C_SaferCond cond3;
  this->m_replayer->start(&cond3);
  ASSERT_EQ(0, cond3.wait());

  ASSERT_TRUE(this->m_replayer->is_replaying());

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < 2 * TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TYPED_TEST(TestImageReplayer, Resync_StartInterrupted)
{
  this->bootstrap();

  librbd::ImageCtx *ictx;
  this->open_local_image(&ictx);
  EXPECT_EQ(0, librbd::api::Mirror<>::image_resync(ictx));
  this->close_image(ictx);

  C_SaferCond cond;
  this->m_replayer->start(&cond);
  ASSERT_EQ(0, cond.wait());

  ASSERT_TRUE(this->m_replayer->is_stopped());

  C_SaferCond cond2;
  this->m_replayer->start(&cond2);
  ASSERT_EQ(0, cond2.wait());

  this->create_watch_ctx();

  ASSERT_TRUE(this->m_replayer->is_replaying());

  this->generate_test_data();
  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);

  this->wait_for_replay_complete();

  for (int i = TEST_IO_COUNT; i < 2 * TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < 2 * TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TEST_F(TestImageReplayerJournal, MultipleReplayFailures_SingleEpoch) {
  this->bootstrap();

  // inject a snapshot that cannot be unprotected
  librbd::ImageCtx *ictx;
  this->open_image(this->m_local_ioctx, this->m_image_name, false, &ictx);
  ictx->features &= ~RBD_FEATURE_JOURNALING;
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, ictx->operations->snap_create(cls::rbd::UserSnapshotNamespace(),
					     "foo", 0, prog_ctx));
  ASSERT_EQ(0, ictx->operations->snap_protect(cls::rbd::UserSnapshotNamespace(),
					      "foo"));
  ASSERT_EQ(0, librbd::cls_client::add_child(&ictx->md_ctx, RBD_CHILDREN,
                                             {ictx->md_ctx.get_id(), "",
                                              ictx->id,
					      ictx->snap_ids[{cls::rbd::UserSnapshotNamespace(), "foo"}]},
                                             "dummy child id"));
  this->close_image(ictx);

  // race failed op shut down with new ops
  this->open_remote_image(&ictx);
  for (uint64_t i = 0; i < 10; ++i) {
    std::shared_lock owner_locker{ictx->owner_lock};
    C_SaferCond request_lock;
    ictx->exclusive_lock->acquire_lock(&request_lock);
    ASSERT_EQ(0, request_lock.wait());

    C_SaferCond append_ctx;
    ictx->journal->append_op_event(
      i,
      librbd::journal::EventEntry{
        librbd::journal::SnapUnprotectEvent{i,
					    cls::rbd::UserSnapshotNamespace(),
					    "foo"}},
      &append_ctx);
    ASSERT_EQ(0, append_ctx.wait());

    C_SaferCond commit_ctx;
    ictx->journal->commit_op_event(i, 0, &commit_ctx);
    ASSERT_EQ(0, commit_ctx.wait());

    C_SaferCond release_ctx;
    ictx->exclusive_lock->release_lock(&release_ctx);
    ASSERT_EQ(0, release_ctx.wait());
  }

  for (uint64_t i = 0; i < 5; ++i) {
    this->start();
    this->wait_for_stopped();
    this->unwatch();
  }
  this->close_image(ictx);
}

TEST_F(TestImageReplayerJournal, MultipleReplayFailures_MultiEpoch) {
  this->bootstrap();

  // inject a snapshot that cannot be unprotected
  librbd::ImageCtx *ictx;
  this->open_image(this->m_local_ioctx, this->m_image_name, false, &ictx);
  ictx->features &= ~RBD_FEATURE_JOURNALING;
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, ictx->operations->snap_create(cls::rbd::UserSnapshotNamespace(),
					     "foo", 0, prog_ctx));
  ASSERT_EQ(0, ictx->operations->snap_protect(cls::rbd::UserSnapshotNamespace(),
					      "foo"));
  ASSERT_EQ(0, librbd::cls_client::add_child(&ictx->md_ctx, RBD_CHILDREN,
                                             {ictx->md_ctx.get_id(), "",
                                              ictx->id,
					      ictx->snap_ids[{cls::rbd::UserSnapshotNamespace(),
							      "foo"}]},
                                             "dummy child id"));
  this->close_image(ictx);

  // race failed op shut down with new tag flush
  this->open_remote_image(&ictx);
  {
    std::shared_lock owner_locker{ictx->owner_lock};
    C_SaferCond request_lock;
    ictx->exclusive_lock->acquire_lock(&request_lock);
    ASSERT_EQ(0, request_lock.wait());

    C_SaferCond append_ctx;
    ictx->journal->append_op_event(
      1U,
      librbd::journal::EventEntry{
        librbd::journal::SnapUnprotectEvent{1U,
					    cls::rbd::UserSnapshotNamespace(),
					    "foo"}},
      &append_ctx);
    ASSERT_EQ(0, append_ctx.wait());

    C_SaferCond commit_ctx;
    ictx->journal->commit_op_event(1U, 0, &commit_ctx);
    ASSERT_EQ(0, commit_ctx.wait());

    C_SaferCond release_ctx;
    ictx->exclusive_lock->release_lock(&release_ctx);
    ASSERT_EQ(0, release_ctx.wait());
  }

  this->generate_test_data();
  this->write_test_data(ictx, this->m_test_data, 0, TEST_IO_SIZE);

  for (uint64_t i = 0; i < 5; ++i) {
    this->start();
    this->wait_for_stopped();
    this->unwatch();
  }
  this->close_image(ictx);
}

TEST_F(TestImageReplayerJournal, Disconnect)
{
  this->bootstrap();

  // Make sure rbd_mirroring_resync_after_disconnect is not set
  EXPECT_EQ(0, this->m_local_cluster->conf_set("rbd_mirroring_resync_after_disconnect", "false"));

  // Test start fails if disconnected

  librbd::ImageCtx *ictx;

  this->generate_test_data();
  this->open_remote_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  std::string oid = ::journal::Journaler::header_oid(this->m_remote_image_id);
  ASSERT_EQ(0,
            cls::journal::client::client_update_state(this->m_remote_ioctx,
              oid, this->m_local_mirror_uuid,
              cls::journal::CLIENT_STATE_DISCONNECTED));

  C_SaferCond cond1;
  this->m_replayer->start(&cond1);
  ASSERT_EQ(-ENOTCONN, cond1.wait());

  // Test start succeeds after resync

  this->open_local_image(&ictx);
  librbd::Journal<>::request_resync(ictx);
  this->close_image(ictx);
  C_SaferCond cond2;
  this->m_replayer->start(&cond2);
  ASSERT_EQ(0, cond2.wait());

  this->start();
  this->wait_for_replay_complete();

  // Test replay stopped after disconnect

  this->open_remote_image(&ictx);
  for (int i = TEST_IO_COUNT; i < 2 * TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  ASSERT_EQ(0,
            cls::journal::client::client_update_state(this->m_remote_ioctx, oid,
              this->m_local_mirror_uuid,
              cls::journal::CLIENT_STATE_DISCONNECTED));
  bufferlist bl;
  ASSERT_EQ(0, this->m_remote_ioctx.notify2(oid, bl, 5000, NULL));

  this->wait_for_stopped();

  // Test start fails after disconnect

  C_SaferCond cond3;
  this->m_replayer->start(&cond3);
  ASSERT_EQ(-ENOTCONN, cond3.wait());
  C_SaferCond cond4;
  this->m_replayer->start(&cond4);
  ASSERT_EQ(-ENOTCONN, cond4.wait());

  // Test automatic resync if rbd_mirroring_resync_after_disconnect is set

  EXPECT_EQ(0, this->m_local_cluster->conf_set("rbd_mirroring_resync_after_disconnect", "true"));

  // Resync is flagged on first start attempt
  C_SaferCond cond5;
  this->m_replayer->start(&cond5);
  ASSERT_EQ(-ENOTCONN, cond5.wait());

  C_SaferCond cond6;
  this->m_replayer->start(&cond6);
  ASSERT_EQ(0, cond6.wait());
  this->wait_for_replay_complete();

  this->stop();
}

TEST_F(TestImageReplayerJournal, UpdateFeatures)
{
  // TODO add support to snapshot-based mirroring
  const uint64_t FEATURES_TO_UPDATE =
    RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF;

  uint64_t features;
  librbd::ImageCtx *ictx;

  // Make sure the features we will update are disabled initially

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  features &= FEATURES_TO_UPDATE;
  if (features) {
    ASSERT_EQ(0, ictx->operations->update_features(FEATURES_TO_UPDATE,
                                                   false));
  }
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0U, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  this->bootstrap();

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0U, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  this->open_local_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0U, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  // Start replay and update features

  this->start();

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, ictx->operations->update_features(FEATURES_TO_UPDATE,
                                                 true));
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(FEATURES_TO_UPDATE, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(FEATURES_TO_UPDATE, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, ictx->operations->update_features(FEATURES_TO_UPDATE,
                                                 false));
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0U, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_EQ(0U, features & FEATURES_TO_UPDATE);
  this->close_image(ictx);

  // Test update_features error does not stop replication

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, librbd::get_features(ictx, &features));
  ASSERT_NE(0U, features & RBD_FEATURE_EXCLUSIVE_LOCK);
  ASSERT_EQ(-EINVAL, ictx->operations->update_features(RBD_FEATURE_EXCLUSIVE_LOCK,
                                                       false));
  this->generate_test_data();
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->read_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                         TEST_IO_SIZE);
  }
  this->close_image(ictx);

  this->stop();
}

TEST_F(TestImageReplayerJournal, MetadataSetRemove)
{
  // TODO add support to snapshot-based mirroring
  const std::string KEY = "test_key";
  const std::string VALUE = "test_value";

  librbd::ImageCtx *ictx;
  std::string value;

  this->bootstrap();

  this->start();

  // Test metadata_set replication

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, ictx->operations->metadata_set(KEY, VALUE));
  value.clear();
  ASSERT_EQ(0, librbd::metadata_get(ictx, KEY, &value));
  ASSERT_EQ(VALUE, value);
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  value.clear();
  ASSERT_EQ(0, librbd::metadata_get(ictx, KEY, &value));
  ASSERT_EQ(VALUE, value);
  this->close_image(ictx);

  // Test metadata_remove replication

  this->open_remote_image(&ictx);
  ASSERT_EQ(0, ictx->operations->metadata_remove(KEY));
  ASSERT_EQ(-ENOENT, librbd::metadata_get(ictx, KEY, &value));
  this->close_image(ictx);

  this->wait_for_replay_complete();

  this->open_local_image(&ictx);
  ASSERT_EQ(-ENOENT, librbd::metadata_get(ictx, KEY, &value));
  this->close_image(ictx);

  this->stop();
}

TEST_F(TestImageReplayerJournal, MirroringDelay)
{
  // TODO add support to snapshot-based mirroring
  const double DELAY = 10; // set less than wait_for_replay_complete timeout

  librbd::ImageCtx *ictx;
  utime_t start_time;
  double delay;

  this->bootstrap();

  ASSERT_EQ(0, this->m_local_cluster->conf_set("rbd_mirroring_replay_delay",
                                         stringify(DELAY).c_str()));
  this->open_local_image(&ictx);
  ASSERT_EQ(DELAY, ictx->mirroring_replay_delay);
  this->close_image(ictx);

  this->start();

  // Test delay

  this->generate_test_data();
  this->open_remote_image(&ictx);
  start_time = ceph_clock_now();
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->flush(ictx);
  this->close_image(ictx);

  this->wait_for_replay_complete();
  delay = ceph_clock_now() - start_time;
  ASSERT_GE(delay, DELAY);

  // Test stop when delaying replay

  this->open_remote_image(&ictx);
  start_time = ceph_clock_now();
  for (int i = 0; i < TEST_IO_COUNT; ++i) {
    this->write_test_data(ictx, this->m_test_data, TEST_IO_SIZE * i,
                          TEST_IO_SIZE);
  }
  this->close_image(ictx);

  sleep(DELAY / 2);
  this->stop();
  this->start();

  this->wait_for_replay_complete();
  delay = ceph_clock_now() - start_time;
  ASSERT_GE(delay, DELAY);

  this->stop();
}

TYPED_TEST(TestImageReplayer, ImageRename) {
  this->create_replayer();
  this->start();

  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);
  auto image_name = this->get_temp_image_name();
  ASSERT_EQ(0, remote_image_ctx->operations->rename(image_name.c_str()));
  this->flush(remote_image_ctx);

  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_image(this->m_local_ioctx, image_name, true, &local_image_ctx);
  ASSERT_EQ(image_name, local_image_ctx->name);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, UpdateFeatures) {
  const uint64_t FEATURES_TO_UPDATE =
    RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF | RBD_FEATURE_DEEP_FLATTEN;
  REQUIRE((this->FEATURES & FEATURES_TO_UPDATE) == FEATURES_TO_UPDATE);

  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  ASSERT_EQ(0, remote_image_ctx->operations->update_features(
                 (RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF), false));
  this->flush(remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  ASSERT_EQ(0U, local_image_ctx->features & (
                  RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF));

  // enable object-map/fast-diff
  ASSERT_EQ(0, remote_image_ctx->operations->update_features(
                 (RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF), true));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  ASSERT_EQ(RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF,
            local_image_ctx->features & (
              RBD_FEATURE_OBJECT_MAP | RBD_FEATURE_FAST_DIFF));

  // disable deep-flatten
  ASSERT_EQ(0, remote_image_ctx->operations->update_features(
                 RBD_FEATURE_DEEP_FLATTEN, false));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  ASSERT_EQ(0, local_image_ctx->features & RBD_FEATURE_DEEP_FLATTEN);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, SnapshotUnprotect) {
  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  // create a protected snapshot
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, remote_image_ctx->operations->snap_create(
              cls::rbd::UserSnapshotNamespace{}, "snap1", 0, prog_ctx));
  ASSERT_EQ(0, remote_image_ctx->operations->snap_protect(
                 cls::rbd::UserSnapshotNamespace{}, "snap1"));
  this->flush(remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  auto local_snap_id_it = local_image_ctx->snap_ids.find({
    {cls::rbd::UserSnapshotNamespace{}}, "snap1"});
  ASSERT_NE(local_image_ctx->snap_ids.end(), local_snap_id_it);
  auto local_snap_id = local_snap_id_it->second;
  auto local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ(RBD_PROTECTION_STATUS_PROTECTED,
            local_snap_info_it->second.protection_status);

  // unprotect the snapshot
  ASSERT_EQ(0, remote_image_ctx->operations->snap_unprotect(
                 cls::rbd::UserSnapshotNamespace{}, "snap1"));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ(RBD_PROTECTION_STATUS_UNPROTECTED,
            local_snap_info_it->second.protection_status);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, SnapshotProtect) {
  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  // create an unprotected snapshot
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, remote_image_ctx->operations->snap_create(
                 cls::rbd::UserSnapshotNamespace{}, "snap1", 0, prog_ctx));
  this->flush(remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  auto local_snap_id_it = local_image_ctx->snap_ids.find({
    {cls::rbd::UserSnapshotNamespace{}}, "snap1"});
  ASSERT_NE(local_image_ctx->snap_ids.end(), local_snap_id_it);
  auto local_snap_id = local_snap_id_it->second;
  auto local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ(RBD_PROTECTION_STATUS_UNPROTECTED,
            local_snap_info_it->second.protection_status);

  // protect the snapshot
  ASSERT_EQ(0, remote_image_ctx->operations->snap_protect(
                 cls::rbd::UserSnapshotNamespace{}, "snap1"));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ(RBD_PROTECTION_STATUS_PROTECTED,
            local_snap_info_it->second.protection_status);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, SnapshotRemove) {
  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  // create a user snapshot
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, remote_image_ctx->operations->snap_create(
                 cls::rbd::UserSnapshotNamespace{}, "snap1", 0, prog_ctx));
  this->flush(remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  auto local_snap_id_it = local_image_ctx->snap_ids.find({
    {cls::rbd::UserSnapshotNamespace{}}, "snap1"});
  ASSERT_NE(local_image_ctx->snap_ids.end(), local_snap_id_it);

  // remove the snapshot
  ASSERT_EQ(0, remote_image_ctx->operations->snap_remove(
                 cls::rbd::UserSnapshotNamespace{}, "snap1"));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  local_snap_id_it = local_image_ctx->snap_ids.find({
    {cls::rbd::UserSnapshotNamespace{}}, "snap1"});
  ASSERT_EQ(local_image_ctx->snap_ids.end(), local_snap_id_it);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, SnapshotRename) {
  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  // create a user snapshot
  librbd::NoOpProgressContext prog_ctx;
  ASSERT_EQ(0, remote_image_ctx->operations->snap_create(
                 cls::rbd::UserSnapshotNamespace{}, "snap1", 0, prog_ctx));
  this->flush(remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  auto local_snap_id_it = local_image_ctx->snap_ids.find({
    {cls::rbd::UserSnapshotNamespace{}}, "snap1"});
  ASSERT_NE(local_image_ctx->snap_ids.end(), local_snap_id_it);
  auto local_snap_id = local_snap_id_it->second;
  auto local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ(RBD_PROTECTION_STATUS_UNPROTECTED,
            local_snap_info_it->second.protection_status);

  // rename the snapshot
  ASSERT_EQ(0, remote_image_ctx->operations->snap_rename(
                 "snap1", "snap1-renamed"));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, local_image_ctx->state->refresh());
  local_snap_info_it = local_image_ctx->snap_info.find(local_snap_id);
  ASSERT_NE(local_image_ctx->snap_info.end(), local_snap_info_it);
  ASSERT_EQ("snap1-renamed", local_snap_info_it->second.name);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

TYPED_TEST(TestImageReplayer, SnapshotLimit) {
  librbd::ImageCtx* remote_image_ctx = nullptr;
  this->open_remote_image(&remote_image_ctx);

  this->create_replayer();
  this->start();
  this->wait_for_replay_complete();

  // update the snap limit
  ASSERT_EQ(0, librbd::api::Snapshot<>::set_limit(remote_image_ctx, 123U));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  librbd::ImageCtx* local_image_ctx = nullptr;
  this->open_local_image(&local_image_ctx);
  uint64_t local_snap_limit;
  ASSERT_EQ(0, librbd::api::Snapshot<>::get_limit(local_image_ctx,
                                                  &local_snap_limit));
  ASSERT_EQ(123U, local_snap_limit);

  // update the limit again
  ASSERT_EQ(0, librbd::api::Snapshot<>::set_limit(
    remote_image_ctx, std::numeric_limits<uint64_t>::max()));
  this->flush(remote_image_ctx);
  this->wait_for_replay_complete();

  ASSERT_EQ(0, librbd::api::Snapshot<>::get_limit(local_image_ctx,
                                                  &local_snap_limit));
  ASSERT_EQ(std::numeric_limits<uint64_t>::max(), local_snap_limit);

  this->close_image(local_image_ctx);
  this->close_image(remote_image_ctx);
  this->stop();
}

} // namespace mirror
} // namespace rbd