1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "journal/Journaler.h"
5 #include "include/stringify.h"
6 #include "common/errno.h"
7 #include "common/Timer.h"
8 #include "common/WorkQueue.h"
9 #include "journal/Entry.h"
10 #include "journal/FutureImpl.h"
11 #include "journal/JournalMetadata.h"
12 #include "journal/JournalPlayer.h"
13 #include "journal/JournalRecorder.h"
14 #include "journal/JournalTrimmer.h"
15 #include "journal/ReplayEntry.h"
16 #include "journal/ReplayHandler.h"
17 #include "cls/journal/cls_journal_client.h"
18 #include "cls/journal/cls_journal_types.h"
21 #define dout_subsys ceph_subsys_journaler
23 #define dout_prefix *_dout << "Journaler: " << this << " "
29 static const std::string JOURNAL_HEADER_PREFIX = "journal.";
30 static const std::string JOURNAL_OBJECT_PREFIX = "journal_data.";
32 } // anonymous namespace
34 using namespace cls::journal;
35 using utils::rados_ctx_callback;
37 std::string Journaler::header_oid(const std::string &journal_id) {
38 return JOURNAL_HEADER_PREFIX + journal_id;
41 std::string Journaler::object_oid_prefix(int pool_id,
42 const std::string &journal_id) {
43 return JOURNAL_OBJECT_PREFIX + stringify(pool_id) + "." + journal_id + ".";
46 Journaler::Threads::Threads(CephContext *cct)
47 : timer_lock("Journaler::timer_lock") {
48 thread_pool = new ThreadPool(cct, "Journaler::thread_pool", "tp_journal", 1);
51 work_queue = new ContextWQ("Journaler::work_queue", 60, thread_pool);
53 timer = new SafeTimer(cct, timer_lock, true);
57 Journaler::Threads::~Threads() {
59 Mutex::Locker timer_locker(timer_lock);
71 Journaler::Journaler(librados::IoCtx &header_ioctx,
72 const std::string &journal_id,
73 const std::string &client_id, const Settings &settings)
74 : m_threads(new Threads(reinterpret_cast<CephContext*>(header_ioctx.cct()))),
75 m_client_id(client_id) {
76 set_up(m_threads->work_queue, m_threads->timer, &m_threads->timer_lock,
77 header_ioctx, journal_id, settings);
80 Journaler::Journaler(ContextWQ *work_queue, SafeTimer *timer,
81 Mutex *timer_lock, librados::IoCtx &header_ioctx,
82 const std::string &journal_id,
83 const std::string &client_id, const Settings &settings)
84 : m_client_id(client_id) {
85 set_up(work_queue, timer, timer_lock, header_ioctx, journal_id,
89 void Journaler::set_up(ContextWQ *work_queue, SafeTimer *timer,
90 Mutex *timer_lock, librados::IoCtx &header_ioctx,
91 const std::string &journal_id,
92 const Settings &settings) {
93 m_header_ioctx.dup(header_ioctx);
94 m_cct = reinterpret_cast<CephContext *>(m_header_ioctx.cct());
96 m_header_oid = header_oid(journal_id);
97 m_object_oid_prefix = object_oid_prefix(m_header_ioctx.get_id(), journal_id);
99 m_metadata = new JournalMetadata(work_queue, timer, timer_lock,
100 m_header_ioctx, m_header_oid, m_client_id,
105 Journaler::~Journaler() {
106 if (m_metadata != nullptr) {
107 assert(!m_metadata->is_initialized());
108 if (!m_initialized) {
109 // never initialized -- ensure any in-flight ops are complete
110 // since we wouldn't expect shut_down to be invoked
111 m_metadata->wait_for_ops();
114 m_metadata = nullptr;
116 assert(m_trimmer == nullptr);
117 assert(m_player == nullptr);
118 assert(m_recorder == nullptr);
123 void Journaler::exists(Context *on_finish) const {
124 librados::ObjectReadOperation op;
125 op.stat(NULL, NULL, NULL);
127 librados::AioCompletion *comp =
128 librados::Rados::aio_create_completion(on_finish, nullptr, rados_ctx_callback);
129 int r = m_header_ioctx.aio_operate(m_header_oid, comp, &op, NULL);
134 void Journaler::init(Context *on_init) {
135 m_initialized = true;
136 m_metadata->init(new C_InitJournaler(this, on_init));
139 int Journaler::init_complete() {
140 int64_t pool_id = m_metadata->get_pool_id();
142 if (pool_id < 0 || pool_id == m_header_ioctx.get_id()) {
143 ldout(m_cct, 20) << "using image pool for journal data" << dendl;
144 m_data_ioctx.dup(m_header_ioctx);
146 ldout(m_cct, 20) << "using pool id=" << pool_id << " for journal data"
148 librados::Rados rados(m_header_ioctx);
149 int r = rados.ioctx_create2(pool_id, m_data_ioctx);
152 ldout(m_cct, 1) << "pool id=" << pool_id << " no longer exists"
158 m_trimmer = new JournalTrimmer(m_data_ioctx, m_object_oid_prefix,
163 void Journaler::shut_down() {
169 void Journaler::shut_down(Context *on_finish) {
170 assert(m_player == nullptr);
171 assert(m_recorder == nullptr);
173 JournalMetadata *metadata = nullptr;
174 std::swap(metadata, m_metadata);
175 assert(metadata != nullptr);
177 on_finish = new FunctionContext([metadata, on_finish](int r) {
179 on_finish->complete(0);
182 JournalTrimmer *trimmer = nullptr;
183 std::swap(trimmer, m_trimmer);
184 if (trimmer == nullptr) {
185 metadata->shut_down(on_finish);
189 on_finish = new FunctionContext([trimmer, metadata, on_finish](int r) {
191 metadata->shut_down(on_finish);
193 trimmer->shut_down(on_finish);
196 bool Journaler::is_initialized() const {
197 return m_metadata->is_initialized();
200 void Journaler::get_immutable_metadata(uint8_t *order, uint8_t *splay_width,
201 int64_t *pool_id, Context *on_finish) {
202 m_metadata->get_immutable_metadata(order, splay_width, pool_id, on_finish);
205 void Journaler::get_mutable_metadata(uint64_t *minimum_set,
206 uint64_t *active_set,
207 RegisteredClients *clients,
208 Context *on_finish) {
209 m_metadata->get_mutable_metadata(minimum_set, active_set, clients, on_finish);
212 void Journaler::create(uint8_t order, uint8_t splay_width,
213 int64_t pool_id, Context *on_finish) {
214 if (order > 64 || order < 12) {
215 lderr(m_cct) << "order must be in the range [12, 64]" << dendl;
216 on_finish->complete(-EDOM);
219 if (splay_width == 0) {
220 on_finish->complete(-EINVAL);
224 ldout(m_cct, 5) << "creating new journal: " << m_header_oid << dendl;
226 librados::ObjectWriteOperation op;
227 client::create(&op, order, splay_width, pool_id);
229 librados::AioCompletion *comp =
230 librados::Rados::aio_create_completion(on_finish, nullptr, rados_ctx_callback);
231 int r = m_header_ioctx.aio_operate(m_header_oid, comp, &op);
236 void Journaler::remove(bool force, Context *on_finish) {
237 // chain journal removal (reverse order)
238 on_finish = new FunctionContext([this, on_finish](int r) {
239 librados::AioCompletion *comp = librados::Rados::aio_create_completion(
240 on_finish, nullptr, utils::rados_ctx_callback);
241 r = m_header_ioctx.aio_remove(m_header_oid, comp);
246 on_finish = new FunctionContext([this, force, on_finish](int r) {
247 m_trimmer->remove_objects(force, on_finish);
250 m_metadata->shut_down(on_finish);
253 void Journaler::flush_commit_position(Context *on_safe) {
254 m_metadata->flush_commit_position(on_safe);
257 void Journaler::add_listener(JournalMetadataListener *listener) {
258 m_metadata->add_listener(listener);
261 void Journaler::remove_listener(JournalMetadataListener *listener) {
262 m_metadata->remove_listener(listener);
265 int Journaler::register_client(const bufferlist &data) {
267 register_client(data, &cond);
271 int Journaler::unregister_client() {
273 unregister_client(&cond);
277 void Journaler::register_client(const bufferlist &data, Context *on_finish) {
278 return m_metadata->register_client(data, on_finish);
281 void Journaler::update_client(const bufferlist &data, Context *on_finish) {
282 return m_metadata->update_client(data, on_finish);
285 void Journaler::unregister_client(Context *on_finish) {
286 return m_metadata->unregister_client(on_finish);
289 void Journaler::get_client(const std::string &client_id,
290 cls::journal::Client *client,
291 Context *on_finish) {
292 m_metadata->get_client(client_id, client, on_finish);
295 int Journaler::get_cached_client(const std::string &client_id,
296 cls::journal::Client *client) {
297 RegisteredClients clients;
298 m_metadata->get_registered_clients(&clients);
300 auto it = clients.find({client_id, {}});
301 if (it == clients.end()) {
309 void Journaler::allocate_tag(const bufferlist &data, cls::journal::Tag *tag,
310 Context *on_finish) {
311 m_metadata->allocate_tag(cls::journal::Tag::TAG_CLASS_NEW, data, tag,
315 void Journaler::allocate_tag(uint64_t tag_class, const bufferlist &data,
316 cls::journal::Tag *tag, Context *on_finish) {
317 m_metadata->allocate_tag(tag_class, data, tag, on_finish);
320 void Journaler::get_tag(uint64_t tag_tid, Tag *tag, Context *on_finish) {
321 m_metadata->get_tag(tag_tid, tag, on_finish);
324 void Journaler::get_tags(uint64_t tag_class, Tags *tags, Context *on_finish) {
325 m_metadata->get_tags(0, tag_class, tags, on_finish);
328 void Journaler::get_tags(uint64_t start_after_tag_tid, uint64_t tag_class,
329 Tags *tags, Context *on_finish) {
330 m_metadata->get_tags(start_after_tag_tid, tag_class, tags, on_finish);
333 void Journaler::start_replay(ReplayHandler *replay_handler) {
334 create_player(replay_handler);
335 m_player->prefetch();
338 void Journaler::start_live_replay(ReplayHandler *replay_handler,
340 create_player(replay_handler);
341 m_player->prefetch_and_watch(interval);
344 bool Journaler::try_pop_front(ReplayEntry *replay_entry,
346 assert(m_player != NULL);
350 if (!m_player->try_pop_front(&entry, &commit_tid)) {
354 *replay_entry = ReplayEntry(entry.get_data(), commit_tid);
355 if (tag_tid != nullptr) {
356 *tag_tid = entry.get_tag_tid();
361 void Journaler::stop_replay() {
367 void Journaler::stop_replay(Context *on_finish) {
368 JournalPlayer *player = nullptr;
369 std::swap(player, m_player);
370 assert(player != nullptr);
372 on_finish = new FunctionContext([player, on_finish](int r) {
374 on_finish->complete(r);
376 player->shut_down(on_finish);
379 void Journaler::committed(const ReplayEntry &replay_entry) {
380 m_trimmer->committed(replay_entry.get_commit_tid());
383 void Journaler::committed(const Future &future) {
384 FutureImplPtr future_impl = future.get_future_impl();
385 m_trimmer->committed(future_impl->get_commit_tid());
388 void Journaler::start_append(int flush_interval, uint64_t flush_bytes,
390 assert(m_recorder == NULL);
392 // TODO verify active object set >= current replay object set
394 m_recorder = new JournalRecorder(m_data_ioctx, m_object_oid_prefix,
395 m_metadata, flush_interval, flush_bytes,
399 void Journaler::stop_append(Context *on_safe) {
400 JournalRecorder *recorder = nullptr;
401 std::swap(recorder, m_recorder);
402 assert(recorder != nullptr);
404 on_safe = new FunctionContext([recorder, on_safe](int r) {
406 on_safe->complete(r);
408 recorder->flush(on_safe);
411 uint64_t Journaler::get_max_append_size() const {
412 uint64_t max_payload_size = m_metadata->get_object_size() -
413 Entry::get_fixed_size();
414 if (m_metadata->get_settings().max_payload_bytes > 0) {
415 max_payload_size = MIN(max_payload_size,
416 m_metadata->get_settings().max_payload_bytes);
418 return max_payload_size;
421 Future Journaler::append(uint64_t tag_tid, const bufferlist &payload_bl) {
422 return m_recorder->append(tag_tid, payload_bl);
425 void Journaler::flush_append(Context *on_safe) {
426 m_recorder->flush(on_safe);
429 void Journaler::create_player(ReplayHandler *replay_handler) {
430 assert(m_player == NULL);
431 m_player = new JournalPlayer(m_data_ioctx, m_object_oid_prefix, m_metadata,
435 void Journaler::get_metadata(uint8_t *order, uint8_t *splay_width,
437 assert(m_metadata != NULL);
439 *order = m_metadata->get_order();
440 *splay_width = m_metadata->get_splay_width();
441 *pool_id = m_metadata->get_pool_id();
444 std::ostream &operator<<(std::ostream &os,
445 const Journaler &journaler) {
447 if (journaler.m_metadata != NULL) {
448 os << *journaler.m_metadata;
456 } // namespace journal