--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2014 Adam Crume <adamcrume@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include "Replayer.hpp"
+#include "common/errno.h"
+#include "rbd_replay/ActionTypes.h"
+#include "rbd_replay/BufferReader.h"
+#include <boost/foreach.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/scope_exit.hpp>
+#include <fstream>
+#include "global/global_context.h"
+#include "rbd_replay_debug.hpp"
+
+#define dout_context g_ceph_context
+
+using namespace std;
+using namespace rbd_replay;
+
+namespace {
+
+bool is_versioned_replay(BufferReader &buffer_reader) {
+ bufferlist::iterator *it;
+ int r = buffer_reader.fetch(&it);
+ if (r < 0) {
+ return false;
+ }
+
+ if (it->get_remaining() < action::BANNER.size()) {
+ return false;
+ }
+
+ std::string banner;
+ it->copy(action::BANNER.size(), banner);
+ bool versioned = (banner == action::BANNER);
+ if (!versioned) {
+ it->seek(0);
+ }
+ return versioned;
+}
+
+} // anonymous namespace
+
+Worker::Worker(Replayer &replayer)
+ : m_replayer(replayer),
+ m_buffer(100),
+ m_done(false) {
+}
+
+void Worker::start() {
+ m_thread = boost::shared_ptr<boost::thread>(new boost::thread(boost::bind(&Worker::run, this)));
+}
+
+// Should only be called by StopThreadAction
+void Worker::stop() {
+ m_done = true;
+}
+
+void Worker::join() {
+ m_thread->join();
+}
+
+void Worker::send(Action::ptr action) {
+ assert(action);
+ m_buffer.push_front(action);
+}
+
+void Worker::add_pending(PendingIO::ptr io) {
+ assert(io);
+ boost::mutex::scoped_lock lock(m_pending_ios_mutex);
+ assertf(m_pending_ios.count(io->id()) == 0, "id = %d", io->id());
+ m_pending_ios[io->id()] = io;
+}
+
+void Worker::run() {
+ dout(THREAD_LEVEL) << "Worker thread started" << dendl;
+ while (!m_done) {
+ Action::ptr action;
+ m_buffer.pop_back(&action);
+ m_replayer.wait_for_actions(action->predecessors());
+ action->perform(*this);
+ m_replayer.set_action_complete(action->id());
+ }
+ {
+ boost::mutex::scoped_lock lock(m_pending_ios_mutex);
+ bool first_time = true;
+ while (!m_pending_ios.empty()) {
+ if (!first_time) {
+ dout(THREAD_LEVEL) << "Worker thread trying to stop, still waiting for " << m_pending_ios.size() << " pending IOs to complete:" << dendl;
+ pair<action_id_t, PendingIO::ptr> p;
+ BOOST_FOREACH(p, m_pending_ios) {
+ dout(THREAD_LEVEL) << "> " << p.first << dendl;
+ }
+ }
+ m_pending_ios_empty.timed_wait(lock, boost::posix_time::seconds(1));
+ first_time = false;
+ }
+ }
+ dout(THREAD_LEVEL) << "Worker thread stopped" << dendl;
+}
+
+
+void Worker::remove_pending(PendingIO::ptr io) {
+ assert(io);
+ m_replayer.set_action_complete(io->id());
+ boost::mutex::scoped_lock lock(m_pending_ios_mutex);
+ size_t num_erased = m_pending_ios.erase(io->id());
+ assertf(num_erased == 1, "id = %d", io->id());
+ if (m_pending_ios.empty()) {
+ m_pending_ios_empty.notify_all();
+ }
+}
+
+
+librbd::Image* Worker::get_image(imagectx_id_t imagectx_id) {
+ return m_replayer.get_image(imagectx_id);
+}
+
+
+void Worker::put_image(imagectx_id_t imagectx_id, librbd::Image* image) {
+ assert(image);
+ m_replayer.put_image(imagectx_id, image);
+}
+
+
+void Worker::erase_image(imagectx_id_t imagectx_id) {
+ m_replayer.erase_image(imagectx_id);
+}
+
+
+librbd::RBD* Worker::rbd() {
+ return m_replayer.get_rbd();
+}
+
+
+librados::IoCtx* Worker::ioctx() {
+ return m_replayer.get_ioctx();
+}
+
+void Worker::set_action_complete(action_id_t id) {
+ m_replayer.set_action_complete(id);
+}
+
+bool Worker::readonly() const {
+ return m_replayer.readonly();
+}
+
+rbd_loc Worker::map_image_name(string image_name, string snap_name) const {
+ return m_replayer.image_name_map().map(rbd_loc("", image_name, snap_name));
+}
+
+
+Replayer::Replayer(int num_action_trackers)
+ : m_rbd(NULL), m_ioctx(0),
+ m_latency_multiplier(1.0),
+ m_readonly(false), m_dump_perf_counters(false),
+ m_num_action_trackers(num_action_trackers),
+ m_action_trackers(new action_tracker_d[m_num_action_trackers]) {
+ assertf(num_action_trackers > 0, "num_action_trackers = %d", num_action_trackers);
+}
+
+Replayer::~Replayer() {
+ delete[] m_action_trackers;
+}
+
+Replayer::action_tracker_d &Replayer::tracker_for(action_id_t id) {
+ return m_action_trackers[id % m_num_action_trackers];
+}
+
+void Replayer::run(const std::string& replay_file) {
+ {
+ librados::Rados rados;
+ rados.init(NULL);
+ int r = rados.init_with_context(g_ceph_context);
+ if (r) {
+ cerr << "Failed to initialize RADOS: " << cpp_strerror(r) << std::endl;
+ goto out;
+ }
+ r = rados.connect();
+ if (r) {
+ cerr << "Failed to connect to cluster: " << cpp_strerror(r) << std::endl;
+ goto out;
+ }
+
+ if (m_pool_name.empty()) {
+ r = rados.conf_get("rbd_default_pool", m_pool_name);
+ if (r < 0) {
+ cerr << "Failed to retrieve default pool: " << cpp_strerror(r)
+ << std::endl;
+ goto out;
+ }
+ }
+
+ m_ioctx = new librados::IoCtx();
+ {
+ r = rados.ioctx_create(m_pool_name.c_str(), *m_ioctx);
+ if (r) {
+ cerr << "Failed to open pool " << m_pool_name << ": "
+ << cpp_strerror(r) << std::endl;
+ goto out2;
+ }
+ m_rbd = new librbd::RBD();
+ map<thread_id_t, Worker*> workers;
+
+ int fd = open(replay_file.c_str(), O_RDONLY);
+ if (fd < 0) {
+ std::cerr << "Failed to open " << replay_file << ": "
+ << cpp_strerror(errno) << std::endl;
+ exit(1);
+ }
+ BOOST_SCOPE_EXIT( (fd) ) {
+ close(fd);
+ } BOOST_SCOPE_EXIT_END;
+
+ BufferReader buffer_reader(fd);
+ bool versioned = is_versioned_replay(buffer_reader);
+ while (true) {
+ action::ActionEntry action_entry;
+ try {
+ bufferlist::iterator *it;
+ int r = buffer_reader.fetch(&it);
+ if (r < 0) {
+ std::cerr << "Failed to read from trace file: " << cpp_strerror(r)
+ << std::endl;
+ exit(-r);
+ }
+ if (it->get_remaining() == 0) {
+ break;
+ }
+
+ if (versioned) {
+ action_entry.decode(*it);
+ } else {
+ action_entry.decode_unversioned(*it);
+ }
+ } catch (const buffer::error &err) {
+ std::cerr << "Failed to decode trace action: " << err.what() << std::endl;
+ exit(1);
+ }
+
+ Action::ptr action = Action::construct(action_entry);
+ if (!action) {
+ // unknown / unsupported action
+ continue;
+ }
+
+ if (action->is_start_thread()) {
+ Worker *worker = new Worker(*this);
+ workers[action->thread_id()] = worker;
+ worker->start();
+ } else {
+ workers[action->thread_id()]->send(action);
+ }
+ }
+
+ dout(THREAD_LEVEL) << "Waiting for workers to die" << dendl;
+ pair<thread_id_t, Worker*> w;
+ BOOST_FOREACH(w, workers) {
+ w.second->join();
+ delete w.second;
+ }
+ clear_images();
+ delete m_rbd;
+ m_rbd = NULL;
+ }
+ out2:
+ delete m_ioctx;
+ m_ioctx = NULL;
+ }
+ out:
+ ;
+}
+
+
+librbd::Image* Replayer::get_image(imagectx_id_t imagectx_id) {
+ boost::shared_lock<boost::shared_mutex> lock(m_images_mutex);
+ return m_images[imagectx_id];
+}
+
+void Replayer::put_image(imagectx_id_t imagectx_id, librbd::Image *image) {
+ assert(image);
+ boost::unique_lock<boost::shared_mutex> lock(m_images_mutex);
+ assert(m_images.count(imagectx_id) == 0);
+ m_images[imagectx_id] = image;
+}
+
+void Replayer::erase_image(imagectx_id_t imagectx_id) {
+ boost::unique_lock<boost::shared_mutex> lock(m_images_mutex);
+ librbd::Image* image = m_images[imagectx_id];
+ if (m_dump_perf_counters) {
+ string command = "perf dump";
+ cmdmap_t cmdmap;
+ string format = "json-pretty";
+ bufferlist out;
+ g_ceph_context->do_command(command, cmdmap, format, &out);
+ out.write_stream(cout);
+ cout << std::endl;
+ cout.flush();
+ }
+ delete image;
+ m_images.erase(imagectx_id);
+}
+
+void Replayer::set_action_complete(action_id_t id) {
+ dout(DEPGRAPH_LEVEL) << "ActionTracker::set_complete(" << id << ")" << dendl;
+ boost::system_time now(boost::get_system_time());
+ action_tracker_d &tracker = tracker_for(id);
+ boost::unique_lock<boost::shared_mutex> lock(tracker.mutex);
+ assert(tracker.actions.count(id) == 0);
+ tracker.actions[id] = now;
+ tracker.condition.notify_all();
+}
+
+bool Replayer::is_action_complete(action_id_t id) {
+ action_tracker_d &tracker = tracker_for(id);
+ boost::shared_lock<boost::shared_mutex> lock(tracker.mutex);
+ return tracker.actions.count(id) > 0;
+}
+
+void Replayer::wait_for_actions(const action::Dependencies &deps) {
+ boost::posix_time::ptime release_time(boost::posix_time::neg_infin);
+ BOOST_FOREACH(const action::Dependency &dep, deps) {
+ dout(DEPGRAPH_LEVEL) << "Waiting for " << dep.id << dendl;
+ boost::system_time start_time(boost::get_system_time());
+ action_tracker_d &tracker = tracker_for(dep.id);
+ boost::shared_lock<boost::shared_mutex> lock(tracker.mutex);
+ bool first_time = true;
+ while (tracker.actions.count(dep.id) == 0) {
+ if (!first_time) {
+ dout(DEPGRAPH_LEVEL) << "Still waiting for " << dep.id << dendl;
+ }
+ tracker.condition.timed_wait(lock, boost::posix_time::seconds(1));
+ first_time = false;
+ }
+ boost::system_time action_completed_time(tracker.actions[dep.id]);
+ lock.unlock();
+ boost::system_time end_time(boost::get_system_time());
+ long long micros = (end_time - start_time).total_microseconds();
+ dout(DEPGRAPH_LEVEL) << "Finished waiting for " << dep.id << " after " << micros << " microseconds" << dendl;
+ // Apparently the nanoseconds constructor is optional:
+ // http://www.boost.org/doc/libs/1_46_0/doc/html/date_time/details.html#compile_options
+ boost::system_time sub_release_time(action_completed_time + boost::posix_time::microseconds(dep.time_delta * m_latency_multiplier / 1000));
+ if (sub_release_time > release_time) {
+ release_time = sub_release_time;
+ }
+ }
+ if (release_time > boost::get_system_time()) {
+ dout(SLEEP_LEVEL) << "Sleeping for " << (release_time - boost::get_system_time()).total_microseconds() << " microseconds" << dendl;
+ boost::this_thread::sleep(release_time);
+ }
+}
+
+void Replayer::clear_images() {
+ boost::unique_lock<boost::shared_mutex> lock(m_images_mutex);
+ if (m_dump_perf_counters && !m_images.empty()) {
+ string command = "perf dump";
+ cmdmap_t cmdmap;
+ string format = "json-pretty";
+ bufferlist out;
+ g_ceph_context->do_command(command, cmdmap, format, &out);
+ out.write_stream(cout);
+ cout << std::endl;
+ cout.flush();
+ }
+ pair<imagectx_id_t, librbd::Image*> p;
+ BOOST_FOREACH(p, m_images) {
+ delete p.second;
+ }
+ m_images.clear();
+}
+
+void Replayer::set_latency_multiplier(float f) {
+ assertf(f >= 0, "f = %f", f);
+ m_latency_multiplier = f;
+}
+
+bool Replayer::readonly() const {
+ return m_readonly;
+}
+
+void Replayer::set_readonly(bool readonly) {
+ m_readonly = readonly;
+}
+
+string Replayer::pool_name() const {
+ return m_pool_name;
+}
+
+void Replayer::set_pool_name(string pool_name) {
+ m_pool_name = pool_name;
+}
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