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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include "librbd/Journal.h" | |
5 | #include "include/rados/librados.hpp" | |
6 | #include "common/errno.h" | |
7 | #include "common/Timer.h" | |
8 | #include "common/WorkQueue.h" | |
9 | #include "cls/journal/cls_journal_types.h" | |
10 | #include "journal/Journaler.h" | |
11 | #include "journal/Policy.h" | |
12 | #include "journal/ReplayEntry.h" | |
13 | #include "journal/Settings.h" | |
14 | #include "journal/Utils.h" | |
15 | #include "librbd/ExclusiveLock.h" | |
16 | #include "librbd/ImageCtx.h" | |
17 | #include "librbd/io/ImageRequestWQ.h" | |
11fdf7f2 TL |
18 | #include "librbd/io/ObjectDispatchSpec.h" |
19 | #include "librbd/io/ObjectDispatcher.h" | |
7c673cae FG |
20 | #include "librbd/journal/CreateRequest.h" |
21 | #include "librbd/journal/DemoteRequest.h" | |
11fdf7f2 | 22 | #include "librbd/journal/ObjectDispatch.h" |
7c673cae FG |
23 | #include "librbd/journal/OpenRequest.h" |
24 | #include "librbd/journal/RemoveRequest.h" | |
11fdf7f2 | 25 | #include "librbd/journal/ResetRequest.h" |
7c673cae FG |
26 | #include "librbd/journal/Replay.h" |
27 | #include "librbd/journal/PromoteRequest.h" | |
28 | ||
29 | #include <boost/scope_exit.hpp> | |
30 | #include <utility> | |
31 | ||
32 | #define dout_subsys ceph_subsys_rbd | |
33 | #undef dout_prefix | |
34 | #define dout_prefix *_dout << "librbd::Journal: " | |
35 | ||
36 | namespace librbd { | |
37 | ||
38 | using util::create_async_context_callback; | |
39 | using util::create_context_callback; | |
40 | using journal::util::C_DecodeTag; | |
41 | using journal::util::C_DecodeTags; | |
42 | ||
43 | namespace { | |
44 | ||
45 | // TODO: once journaler is 100% async, remove separate threads and | |
46 | // reuse ImageCtx's thread pool | |
47 | class ThreadPoolSingleton : public ThreadPool { | |
48 | public: | |
49 | explicit ThreadPoolSingleton(CephContext *cct) | |
50 | : ThreadPool(cct, "librbd::Journal", "tp_librbd_journ", 1) { | |
51 | start(); | |
52 | } | |
53 | ~ThreadPoolSingleton() override { | |
54 | stop(); | |
55 | } | |
56 | }; | |
57 | ||
58 | template <typename I> | |
59 | struct C_IsTagOwner : public Context { | |
60 | librados::IoCtx &io_ctx; | |
61 | std::string image_id; | |
62 | bool *is_tag_owner; | |
63 | ContextWQ *op_work_queue; | |
64 | Context *on_finish; | |
65 | ||
66 | CephContext *cct = nullptr; | |
67 | Journaler *journaler; | |
68 | cls::journal::Client client; | |
69 | journal::ImageClientMeta client_meta; | |
11fdf7f2 | 70 | uint64_t tag_tid = 0; |
7c673cae FG |
71 | journal::TagData tag_data; |
72 | ||
73 | C_IsTagOwner(librados::IoCtx &io_ctx, const std::string &image_id, | |
74 | bool *is_tag_owner, ContextWQ *op_work_queue, Context *on_finish) | |
75 | : io_ctx(io_ctx), image_id(image_id), is_tag_owner(is_tag_owner), | |
76 | op_work_queue(op_work_queue), on_finish(on_finish), | |
77 | cct(reinterpret_cast<CephContext*>(io_ctx.cct())), | |
78 | journaler(new Journaler(io_ctx, image_id, Journal<>::IMAGE_CLIENT_ID, | |
79 | {})) { | |
80 | } | |
81 | ||
82 | void finish(int r) override { | |
83 | ldout(cct, 20) << this << " C_IsTagOwner::" << __func__ << ": r=" << r | |
84 | << dendl; | |
85 | if (r < 0) { | |
86 | lderr(cct) << this << " C_IsTagOwner::" << __func__ << ": " | |
87 | << "failed to get tag owner: " << cpp_strerror(r) << dendl; | |
88 | } else { | |
89 | *is_tag_owner = (tag_data.mirror_uuid == Journal<>::LOCAL_MIRROR_UUID); | |
90 | } | |
91 | ||
92 | Journaler *journaler = this->journaler; | |
93 | Context *on_finish = this->on_finish; | |
94 | FunctionContext *ctx = new FunctionContext( | |
95 | [journaler, on_finish](int r) { | |
96 | on_finish->complete(r); | |
97 | delete journaler; | |
98 | }); | |
99 | op_work_queue->queue(ctx, r); | |
100 | } | |
101 | }; | |
102 | ||
103 | struct C_GetTagOwner : public Context { | |
104 | std::string *mirror_uuid; | |
105 | Context *on_finish; | |
106 | ||
107 | Journaler journaler; | |
108 | cls::journal::Client client; | |
109 | journal::ImageClientMeta client_meta; | |
11fdf7f2 | 110 | uint64_t tag_tid = 0; |
7c673cae FG |
111 | journal::TagData tag_data; |
112 | ||
113 | C_GetTagOwner(librados::IoCtx &io_ctx, const std::string &image_id, | |
114 | std::string *mirror_uuid, Context *on_finish) | |
115 | : mirror_uuid(mirror_uuid), on_finish(on_finish), | |
116 | journaler(io_ctx, image_id, Journal<>::IMAGE_CLIENT_ID, {}) { | |
117 | } | |
118 | ||
119 | virtual void finish(int r) { | |
120 | if (r >= 0) { | |
121 | *mirror_uuid = tag_data.mirror_uuid; | |
122 | } | |
123 | on_finish->complete(r); | |
124 | } | |
125 | }; | |
126 | ||
127 | template <typename J> | |
128 | struct GetTagsRequest { | |
129 | CephContext *cct; | |
130 | J *journaler; | |
131 | cls::journal::Client *client; | |
132 | journal::ImageClientMeta *client_meta; | |
133 | uint64_t *tag_tid; | |
134 | journal::TagData *tag_data; | |
135 | Context *on_finish; | |
136 | ||
137 | Mutex lock; | |
138 | ||
139 | GetTagsRequest(CephContext *cct, J *journaler, cls::journal::Client *client, | |
140 | journal::ImageClientMeta *client_meta, uint64_t *tag_tid, | |
141 | journal::TagData *tag_data, Context *on_finish) | |
142 | : cct(cct), journaler(journaler), client(client), client_meta(client_meta), | |
143 | tag_tid(tag_tid), tag_data(tag_data), on_finish(on_finish), lock("lock") { | |
144 | } | |
145 | ||
146 | /** | |
147 | * @verbatim | |
148 | * | |
149 | * <start> | |
150 | * | | |
151 | * v | |
152 | * GET_CLIENT * * * * * * * * * * * * | |
153 | * | * | |
154 | * v * | |
155 | * GET_TAGS * * * * * * * * * * * * * (error) | |
156 | * | * | |
157 | * v * | |
158 | * <finish> * * * * * * * * * * * * * | |
159 | * | |
160 | * @endverbatim | |
161 | */ | |
162 | ||
163 | void send() { | |
164 | send_get_client(); | |
165 | } | |
166 | ||
167 | void send_get_client() { | |
168 | ldout(cct, 20) << __func__ << dendl; | |
169 | ||
170 | FunctionContext *ctx = new FunctionContext( | |
171 | [this](int r) { | |
172 | handle_get_client(r); | |
173 | }); | |
174 | journaler->get_client(Journal<ImageCtx>::IMAGE_CLIENT_ID, client, ctx); | |
175 | } | |
176 | ||
177 | void handle_get_client(int r) { | |
178 | ldout(cct, 20) << __func__ << ": r=" << r << dendl; | |
179 | ||
180 | if (r < 0) { | |
181 | complete(r); | |
182 | return; | |
183 | } | |
184 | ||
185 | librbd::journal::ClientData client_data; | |
11fdf7f2 | 186 | auto bl_it = client->data.cbegin(); |
7c673cae | 187 | try { |
11fdf7f2 | 188 | decode(client_data, bl_it); |
7c673cae FG |
189 | } catch (const buffer::error &err) { |
190 | lderr(cct) << this << " OpenJournalerRequest::" << __func__ << ": " | |
191 | << "failed to decode client data" << dendl; | |
192 | complete(-EBADMSG); | |
193 | return; | |
194 | } | |
195 | ||
196 | journal::ImageClientMeta *image_client_meta = | |
197 | boost::get<journal::ImageClientMeta>(&client_data.client_meta); | |
198 | if (image_client_meta == nullptr) { | |
199 | lderr(cct) << this << " OpenJournalerRequest::" << __func__ << ": " | |
200 | << "failed to get client meta" << dendl; | |
201 | complete(-EINVAL); | |
202 | return; | |
203 | } | |
204 | *client_meta = *image_client_meta; | |
205 | ||
206 | send_get_tags(); | |
207 | } | |
208 | ||
209 | void send_get_tags() { | |
210 | ldout(cct, 20) << __func__ << dendl; | |
211 | ||
212 | FunctionContext *ctx = new FunctionContext( | |
213 | [this](int r) { | |
214 | handle_get_tags(r); | |
215 | }); | |
216 | C_DecodeTags *tags_ctx = new C_DecodeTags(cct, &lock, tag_tid, tag_data, | |
217 | ctx); | |
218 | journaler->get_tags(client_meta->tag_class, &tags_ctx->tags, tags_ctx); | |
219 | } | |
220 | ||
221 | void handle_get_tags(int r) { | |
222 | ldout(cct, 20) << __func__ << ": r=" << r << dendl; | |
223 | ||
224 | complete(r); | |
225 | } | |
226 | ||
227 | void complete(int r) { | |
228 | on_finish->complete(r); | |
229 | delete this; | |
230 | } | |
231 | }; | |
232 | ||
233 | template <typename J> | |
234 | void get_tags(CephContext *cct, J *journaler, | |
235 | cls::journal::Client *client, | |
236 | journal::ImageClientMeta *client_meta, | |
237 | uint64_t *tag_tid, journal::TagData *tag_data, | |
238 | Context *on_finish) { | |
239 | ldout(cct, 20) << __func__ << dendl; | |
240 | ||
241 | GetTagsRequest<J> *req = | |
242 | new GetTagsRequest<J>(cct, journaler, client, client_meta, tag_tid, | |
243 | tag_data, on_finish); | |
244 | req->send(); | |
245 | } | |
246 | ||
247 | template <typename J> | |
248 | int allocate_journaler_tag(CephContext *cct, J *journaler, | |
249 | uint64_t tag_class, | |
250 | const journal::TagPredecessor &predecessor, | |
251 | const std::string &mirror_uuid, | |
252 | cls::journal::Tag *new_tag) { | |
253 | journal::TagData tag_data; | |
254 | tag_data.mirror_uuid = mirror_uuid; | |
255 | tag_data.predecessor = predecessor; | |
256 | ||
257 | bufferlist tag_bl; | |
11fdf7f2 | 258 | encode(tag_data, tag_bl); |
7c673cae FG |
259 | |
260 | C_SaferCond allocate_tag_ctx; | |
261 | journaler->allocate_tag(tag_class, tag_bl, new_tag, &allocate_tag_ctx); | |
262 | ||
263 | int r = allocate_tag_ctx.wait(); | |
264 | if (r < 0) { | |
265 | lderr(cct) << __func__ << ": " | |
266 | << "failed to allocate tag: " << cpp_strerror(r) << dendl; | |
267 | return r; | |
268 | } | |
269 | return 0; | |
270 | } | |
271 | ||
272 | } // anonymous namespace | |
273 | ||
274 | // client id for local image | |
275 | template <typename I> | |
276 | const std::string Journal<I>::IMAGE_CLIENT_ID(""); | |
277 | ||
278 | // mirror uuid to use for local images | |
279 | template <typename I> | |
280 | const std::string Journal<I>::LOCAL_MIRROR_UUID(""); | |
281 | ||
282 | // mirror uuid to use for orphaned (demoted) images | |
283 | template <typename I> | |
284 | const std::string Journal<I>::ORPHAN_MIRROR_UUID("<orphan>"); | |
285 | ||
286 | template <typename I> | |
287 | std::ostream &operator<<(std::ostream &os, | |
288 | const typename Journal<I>::State &state) { | |
289 | switch (state) { | |
290 | case Journal<I>::STATE_UNINITIALIZED: | |
291 | os << "Uninitialized"; | |
292 | break; | |
293 | case Journal<I>::STATE_INITIALIZING: | |
294 | os << "Initializing"; | |
295 | break; | |
296 | case Journal<I>::STATE_REPLAYING: | |
297 | os << "Replaying"; | |
298 | break; | |
299 | case Journal<I>::STATE_FLUSHING_RESTART: | |
300 | os << "FlushingRestart"; | |
301 | break; | |
302 | case Journal<I>::STATE_RESTARTING_REPLAY: | |
303 | os << "RestartingReplay"; | |
304 | break; | |
305 | case Journal<I>::STATE_FLUSHING_REPLAY: | |
306 | os << "FlushingReplay"; | |
307 | break; | |
308 | case Journal<I>::STATE_READY: | |
309 | os << "Ready"; | |
310 | break; | |
311 | case Journal<I>::STATE_STOPPING: | |
312 | os << "Stopping"; | |
313 | break; | |
314 | case Journal<I>::STATE_CLOSING: | |
315 | os << "Closing"; | |
316 | break; | |
317 | case Journal<I>::STATE_CLOSED: | |
318 | os << "Closed"; | |
319 | break; | |
320 | default: | |
321 | os << "Unknown (" << static_cast<uint32_t>(state) << ")"; | |
322 | break; | |
323 | } | |
324 | return os; | |
325 | } | |
326 | ||
327 | template <typename I> | |
328 | Journal<I>::Journal(I &image_ctx) | |
329 | : m_image_ctx(image_ctx), m_journaler(NULL), | |
330 | m_lock("Journal<I>::m_lock"), m_state(STATE_UNINITIALIZED), | |
331 | m_error_result(0), m_replay_handler(this), m_close_pending(false), | |
332 | m_event_lock("Journal<I>::m_event_lock"), m_event_tid(0), | |
333 | m_blocking_writes(false), m_journal_replay(NULL), | |
334 | m_metadata_listener(this) { | |
335 | ||
336 | CephContext *cct = m_image_ctx.cct; | |
337 | ldout(cct, 5) << this << ": ictx=" << &m_image_ctx << dendl; | |
338 | ||
11fdf7f2 TL |
339 | auto thread_pool_singleton = |
340 | &cct->lookup_or_create_singleton_object<ThreadPoolSingleton>( | |
341 | "librbd::journal::thread_pool", false, cct); | |
7c673cae | 342 | m_work_queue = new ContextWQ("librbd::journal::work_queue", |
11fdf7f2 | 343 | cct->_conf.get_val<uint64_t>("rbd_op_thread_timeout"), |
7c673cae FG |
344 | thread_pool_singleton); |
345 | ImageCtx::get_timer_instance(cct, &m_timer, &m_timer_lock); | |
346 | } | |
347 | ||
348 | template <typename I> | |
349 | Journal<I>::~Journal() { | |
350 | if (m_work_queue != nullptr) { | |
351 | m_work_queue->drain(); | |
352 | delete m_work_queue; | |
353 | } | |
354 | ||
11fdf7f2 TL |
355 | ceph_assert(m_state == STATE_UNINITIALIZED || m_state == STATE_CLOSED); |
356 | ceph_assert(m_journaler == NULL); | |
357 | ceph_assert(m_journal_replay == NULL); | |
358 | ceph_assert(m_wait_for_state_contexts.empty()); | |
7c673cae FG |
359 | } |
360 | ||
361 | template <typename I> | |
362 | bool Journal<I>::is_journal_supported(I &image_ctx) { | |
11fdf7f2 | 363 | ceph_assert(image_ctx.snap_lock.is_locked()); |
7c673cae FG |
364 | return ((image_ctx.features & RBD_FEATURE_JOURNALING) && |
365 | !image_ctx.read_only && image_ctx.snap_id == CEPH_NOSNAP); | |
366 | } | |
367 | ||
368 | template <typename I> | |
369 | int Journal<I>::create(librados::IoCtx &io_ctx, const std::string &image_id, | |
370 | uint8_t order, uint8_t splay_width, | |
371 | const std::string &object_pool) { | |
372 | CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); | |
373 | ldout(cct, 5) << __func__ << ": image=" << image_id << dendl; | |
374 | ||
375 | ThreadPool *thread_pool; | |
376 | ContextWQ *op_work_queue; | |
377 | ImageCtx::get_thread_pool_instance(cct, &thread_pool, &op_work_queue); | |
378 | ||
379 | C_SaferCond cond; | |
380 | journal::TagData tag_data(LOCAL_MIRROR_UUID); | |
381 | journal::CreateRequest<I> *req = journal::CreateRequest<I>::create( | |
382 | io_ctx, image_id, order, splay_width, object_pool, cls::journal::Tag::TAG_CLASS_NEW, | |
383 | tag_data, IMAGE_CLIENT_ID, op_work_queue, &cond); | |
384 | req->send(); | |
385 | ||
386 | return cond.wait(); | |
387 | } | |
388 | ||
389 | template <typename I> | |
390 | int Journal<I>::remove(librados::IoCtx &io_ctx, const std::string &image_id) { | |
391 | CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); | |
392 | ldout(cct, 5) << __func__ << ": image=" << image_id << dendl; | |
393 | ||
394 | ThreadPool *thread_pool; | |
395 | ContextWQ *op_work_queue; | |
396 | ImageCtx::get_thread_pool_instance(cct, &thread_pool, &op_work_queue); | |
397 | ||
398 | C_SaferCond cond; | |
399 | journal::RemoveRequest<I> *req = journal::RemoveRequest<I>::create( | |
400 | io_ctx, image_id, IMAGE_CLIENT_ID, op_work_queue, &cond); | |
401 | req->send(); | |
402 | ||
403 | return cond.wait(); | |
404 | } | |
405 | ||
406 | template <typename I> | |
407 | int Journal<I>::reset(librados::IoCtx &io_ctx, const std::string &image_id) { | |
408 | CephContext *cct = reinterpret_cast<CephContext *>(io_ctx.cct()); | |
409 | ldout(cct, 5) << __func__ << ": image=" << image_id << dendl; | |
410 | ||
11fdf7f2 TL |
411 | ThreadPool *thread_pool; |
412 | ContextWQ *op_work_queue; | |
413 | ImageCtx::get_thread_pool_instance(cct, &thread_pool, &op_work_queue); | |
7c673cae FG |
414 | |
415 | C_SaferCond cond; | |
11fdf7f2 TL |
416 | auto req = journal::ResetRequest<I>::create(io_ctx, image_id, IMAGE_CLIENT_ID, |
417 | Journal<>::LOCAL_MIRROR_UUID, | |
418 | op_work_queue, &cond); | |
419 | req->send(); | |
7c673cae | 420 | |
11fdf7f2 | 421 | return cond.wait(); |
7c673cae FG |
422 | } |
423 | ||
424 | template <typename I> | |
425 | void Journal<I>::is_tag_owner(I *image_ctx, bool *owner, | |
426 | Context *on_finish) { | |
427 | Journal<I>::is_tag_owner(image_ctx->md_ctx, image_ctx->id, owner, | |
428 | image_ctx->op_work_queue, on_finish); | |
429 | } | |
430 | ||
431 | template <typename I> | |
432 | void Journal<I>::is_tag_owner(librados::IoCtx& io_ctx, std::string& image_id, | |
433 | bool *is_tag_owner, ContextWQ *op_work_queue, | |
434 | Context *on_finish) { | |
435 | CephContext *cct = reinterpret_cast<CephContext*>(io_ctx.cct()); | |
436 | ldout(cct, 20) << __func__ << dendl; | |
437 | ||
438 | C_IsTagOwner<I> *is_tag_owner_ctx = new C_IsTagOwner<I>( | |
439 | io_ctx, image_id, is_tag_owner, op_work_queue, on_finish); | |
440 | get_tags(cct, is_tag_owner_ctx->journaler, &is_tag_owner_ctx->client, | |
441 | &is_tag_owner_ctx->client_meta, &is_tag_owner_ctx->tag_tid, | |
442 | &is_tag_owner_ctx->tag_data, is_tag_owner_ctx); | |
443 | } | |
444 | ||
445 | template <typename I> | |
446 | void Journal<I>::get_tag_owner(IoCtx& io_ctx, std::string& image_id, | |
447 | std::string *mirror_uuid, | |
448 | ContextWQ *op_work_queue, Context *on_finish) { | |
11fdf7f2 | 449 | CephContext *cct = static_cast<CephContext *>(io_ctx.cct()); |
7c673cae FG |
450 | ldout(cct, 20) << __func__ << dendl; |
451 | ||
452 | auto ctx = new C_GetTagOwner(io_ctx, image_id, mirror_uuid, on_finish); | |
453 | get_tags(cct, &ctx->journaler, &ctx->client, &ctx->client_meta, &ctx->tag_tid, | |
454 | &ctx->tag_data, create_async_context_callback(op_work_queue, ctx)); | |
455 | } | |
456 | ||
457 | template <typename I> | |
458 | int Journal<I>::request_resync(I *image_ctx) { | |
459 | CephContext *cct = image_ctx->cct; | |
460 | ldout(cct, 20) << __func__ << dendl; | |
461 | ||
462 | Journaler journaler(image_ctx->md_ctx, image_ctx->id, IMAGE_CLIENT_ID, {}); | |
463 | ||
464 | Mutex lock("lock"); | |
465 | journal::ImageClientMeta client_meta; | |
466 | uint64_t tag_tid; | |
467 | journal::TagData tag_data; | |
468 | ||
469 | C_SaferCond open_ctx; | |
470 | auto open_req = journal::OpenRequest<I>::create(image_ctx, &journaler, &lock, | |
471 | &client_meta, &tag_tid, | |
472 | &tag_data, &open_ctx); | |
473 | open_req->send(); | |
474 | ||
475 | BOOST_SCOPE_EXIT_ALL(&journaler) { | |
476 | journaler.shut_down(); | |
477 | }; | |
478 | ||
479 | int r = open_ctx.wait(); | |
480 | if (r < 0) { | |
481 | return r; | |
482 | } | |
483 | ||
484 | client_meta.resync_requested = true; | |
485 | ||
486 | journal::ClientData client_data(client_meta); | |
487 | bufferlist client_data_bl; | |
11fdf7f2 | 488 | encode(client_data, client_data_bl); |
7c673cae FG |
489 | |
490 | C_SaferCond update_client_ctx; | |
491 | journaler.update_client(client_data_bl, &update_client_ctx); | |
492 | ||
493 | r = update_client_ctx.wait(); | |
494 | if (r < 0) { | |
495 | lderr(cct) << __func__ << ": " | |
496 | << "failed to update client: " << cpp_strerror(r) << dendl; | |
497 | return r; | |
498 | } | |
499 | return 0; | |
500 | } | |
501 | ||
502 | template <typename I> | |
503 | void Journal<I>::promote(I *image_ctx, Context *on_finish) { | |
504 | CephContext *cct = image_ctx->cct; | |
505 | ldout(cct, 20) << __func__ << dendl; | |
506 | ||
507 | auto promote_req = journal::PromoteRequest<I>::create(image_ctx, false, | |
508 | on_finish); | |
509 | promote_req->send(); | |
510 | } | |
511 | ||
512 | template <typename I> | |
513 | void Journal<I>::demote(I *image_ctx, Context *on_finish) { | |
514 | CephContext *cct = image_ctx->cct; | |
515 | ldout(cct, 20) << __func__ << dendl; | |
516 | ||
517 | auto req = journal::DemoteRequest<I>::create(*image_ctx, on_finish); | |
518 | req->send(); | |
519 | } | |
520 | ||
521 | template <typename I> | |
522 | bool Journal<I>::is_journal_ready() const { | |
523 | Mutex::Locker locker(m_lock); | |
524 | return (m_state == STATE_READY); | |
525 | } | |
526 | ||
527 | template <typename I> | |
528 | bool Journal<I>::is_journal_replaying() const { | |
529 | Mutex::Locker locker(m_lock); | |
530 | return is_journal_replaying(m_lock); | |
531 | } | |
532 | ||
533 | template <typename I> | |
534 | bool Journal<I>::is_journal_replaying(const Mutex &) const { | |
11fdf7f2 | 535 | ceph_assert(m_lock.is_locked()); |
7c673cae FG |
536 | return (m_state == STATE_REPLAYING || |
537 | m_state == STATE_FLUSHING_REPLAY || | |
538 | m_state == STATE_FLUSHING_RESTART || | |
539 | m_state == STATE_RESTARTING_REPLAY); | |
540 | } | |
541 | ||
542 | template <typename I> | |
543 | bool Journal<I>::is_journal_appending() const { | |
11fdf7f2 | 544 | ceph_assert(m_image_ctx.snap_lock.is_locked()); |
7c673cae FG |
545 | Mutex::Locker locker(m_lock); |
546 | return (m_state == STATE_READY && | |
547 | !m_image_ctx.get_journal_policy()->append_disabled()); | |
548 | } | |
549 | ||
550 | template <typename I> | |
551 | void Journal<I>::wait_for_journal_ready(Context *on_ready) { | |
552 | on_ready = create_async_context_callback(m_image_ctx, on_ready); | |
553 | ||
554 | Mutex::Locker locker(m_lock); | |
555 | if (m_state == STATE_READY) { | |
556 | on_ready->complete(m_error_result); | |
557 | } else { | |
558 | wait_for_steady_state(on_ready); | |
559 | } | |
560 | } | |
561 | ||
562 | template <typename I> | |
563 | void Journal<I>::open(Context *on_finish) { | |
564 | CephContext *cct = m_image_ctx.cct; | |
565 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
566 | ||
567 | on_finish = create_async_context_callback(m_image_ctx, on_finish); | |
568 | ||
11fdf7f2 TL |
569 | // inject our handler into the object dispatcher chain |
570 | m_image_ctx.io_object_dispatcher->register_object_dispatch( | |
571 | journal::ObjectDispatch<I>::create(&m_image_ctx, this)); | |
572 | ||
7c673cae | 573 | Mutex::Locker locker(m_lock); |
11fdf7f2 | 574 | ceph_assert(m_state == STATE_UNINITIALIZED); |
7c673cae FG |
575 | wait_for_steady_state(on_finish); |
576 | create_journaler(); | |
577 | } | |
578 | ||
579 | template <typename I> | |
580 | void Journal<I>::close(Context *on_finish) { | |
581 | CephContext *cct = m_image_ctx.cct; | |
582 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
583 | ||
11fdf7f2 TL |
584 | on_finish = new FunctionContext([this, on_finish](int r) { |
585 | // remove our handler from object dispatcher chain - preserve error | |
586 | auto ctx = new FunctionContext([on_finish, r](int _) { | |
587 | on_finish->complete(r); | |
588 | }); | |
589 | m_image_ctx.io_object_dispatcher->shut_down_object_dispatch( | |
590 | io::OBJECT_DISPATCH_LAYER_JOURNAL, ctx); | |
591 | }); | |
7c673cae FG |
592 | on_finish = create_async_context_callback(m_image_ctx, on_finish); |
593 | ||
594 | Mutex::Locker locker(m_lock); | |
595 | while (m_listener_notify) { | |
596 | m_listener_cond.Wait(m_lock); | |
597 | } | |
598 | ||
599 | Listeners listeners(m_listeners); | |
600 | m_listener_notify = true; | |
601 | m_lock.Unlock(); | |
602 | for (auto listener : listeners) { | |
603 | listener->handle_close(); | |
604 | } | |
605 | ||
606 | m_lock.Lock(); | |
607 | m_listener_notify = false; | |
608 | m_listener_cond.Signal(); | |
609 | ||
11fdf7f2 | 610 | ceph_assert(m_state != STATE_UNINITIALIZED); |
7c673cae FG |
611 | if (m_state == STATE_CLOSED) { |
612 | on_finish->complete(m_error_result); | |
613 | return; | |
614 | } | |
615 | ||
616 | if (m_state == STATE_READY) { | |
617 | stop_recording(); | |
618 | } | |
619 | ||
620 | m_close_pending = true; | |
621 | wait_for_steady_state(on_finish); | |
622 | } | |
623 | ||
624 | template <typename I> | |
625 | bool Journal<I>::is_tag_owner() const { | |
626 | Mutex::Locker locker(m_lock); | |
627 | return is_tag_owner(m_lock); | |
628 | } | |
629 | ||
630 | template <typename I> | |
631 | bool Journal<I>::is_tag_owner(const Mutex &) const { | |
11fdf7f2 | 632 | ceph_assert(m_lock.is_locked()); |
7c673cae FG |
633 | return (m_tag_data.mirror_uuid == LOCAL_MIRROR_UUID); |
634 | } | |
635 | ||
636 | template <typename I> | |
637 | uint64_t Journal<I>::get_tag_tid() const { | |
638 | Mutex::Locker locker(m_lock); | |
639 | return m_tag_tid; | |
640 | } | |
641 | ||
642 | template <typename I> | |
643 | journal::TagData Journal<I>::get_tag_data() const { | |
644 | Mutex::Locker locker(m_lock); | |
645 | return m_tag_data; | |
646 | } | |
647 | ||
648 | template <typename I> | |
649 | void Journal<I>::allocate_local_tag(Context *on_finish) { | |
650 | CephContext *cct = m_image_ctx.cct; | |
651 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
652 | ||
653 | journal::TagPredecessor predecessor; | |
654 | predecessor.mirror_uuid = LOCAL_MIRROR_UUID; | |
655 | { | |
656 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 657 | ceph_assert(m_journaler != nullptr && is_tag_owner(m_lock)); |
7c673cae FG |
658 | |
659 | cls::journal::Client client; | |
660 | int r = m_journaler->get_cached_client(IMAGE_CLIENT_ID, &client); | |
661 | if (r < 0) { | |
662 | lderr(cct) << this << " " << __func__ << ": " | |
663 | << "failed to retrieve client: " << cpp_strerror(r) << dendl; | |
664 | m_image_ctx.op_work_queue->queue(on_finish, r); | |
665 | return; | |
666 | } | |
667 | ||
668 | // since we are primary, populate the predecessor with our known commit | |
669 | // position | |
11fdf7f2 | 670 | ceph_assert(m_tag_data.mirror_uuid == LOCAL_MIRROR_UUID); |
7c673cae FG |
671 | if (!client.commit_position.object_positions.empty()) { |
672 | auto position = client.commit_position.object_positions.front(); | |
673 | predecessor.commit_valid = true; | |
674 | predecessor.tag_tid = position.tag_tid; | |
675 | predecessor.entry_tid = position.entry_tid; | |
676 | } | |
677 | } | |
678 | ||
679 | allocate_tag(LOCAL_MIRROR_UUID, predecessor, on_finish); | |
680 | } | |
681 | ||
682 | template <typename I> | |
683 | void Journal<I>::allocate_tag(const std::string &mirror_uuid, | |
684 | const journal::TagPredecessor &predecessor, | |
685 | Context *on_finish) { | |
686 | CephContext *cct = m_image_ctx.cct; | |
687 | ldout(cct, 20) << this << " " << __func__ << ": mirror_uuid=" << mirror_uuid | |
688 | << dendl; | |
689 | ||
690 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 691 | ceph_assert(m_journaler != nullptr); |
7c673cae FG |
692 | |
693 | journal::TagData tag_data; | |
694 | tag_data.mirror_uuid = mirror_uuid; | |
695 | tag_data.predecessor = predecessor; | |
696 | ||
697 | bufferlist tag_bl; | |
11fdf7f2 | 698 | encode(tag_data, tag_bl); |
7c673cae FG |
699 | |
700 | C_DecodeTag *decode_tag_ctx = new C_DecodeTag(cct, &m_lock, &m_tag_tid, | |
701 | &m_tag_data, on_finish); | |
702 | m_journaler->allocate_tag(m_tag_class, tag_bl, &decode_tag_ctx->tag, | |
703 | decode_tag_ctx); | |
704 | } | |
705 | ||
706 | template <typename I> | |
707 | void Journal<I>::flush_commit_position(Context *on_finish) { | |
708 | CephContext *cct = m_image_ctx.cct; | |
709 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
710 | ||
711 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 712 | ceph_assert(m_journaler != nullptr); |
7c673cae FG |
713 | m_journaler->flush_commit_position(on_finish); |
714 | } | |
715 | ||
716 | template <typename I> | |
717 | uint64_t Journal<I>::append_write_event(uint64_t offset, size_t length, | |
718 | const bufferlist &bl, | |
7c673cae | 719 | bool flush_entry) { |
11fdf7f2 | 720 | ceph_assert(m_max_append_size > journal::AioWriteEvent::get_fixed_size()); |
7c673cae FG |
721 | uint64_t max_write_data_size = |
722 | m_max_append_size - journal::AioWriteEvent::get_fixed_size(); | |
723 | ||
724 | // ensure that the write event fits within the journal entry | |
725 | Bufferlists bufferlists; | |
726 | uint64_t bytes_remaining = length; | |
727 | uint64_t event_offset = 0; | |
728 | do { | |
11fdf7f2 | 729 | uint64_t event_length = std::min(bytes_remaining, max_write_data_size); |
7c673cae FG |
730 | |
731 | bufferlist event_bl; | |
732 | event_bl.substr_of(bl, event_offset, event_length); | |
733 | journal::EventEntry event_entry(journal::AioWriteEvent(offset + event_offset, | |
734 | event_length, | |
735 | event_bl), | |
736 | ceph_clock_now()); | |
737 | ||
738 | bufferlists.emplace_back(); | |
11fdf7f2 | 739 | encode(event_entry, bufferlists.back()); |
7c673cae FG |
740 | |
741 | event_offset += event_length; | |
742 | bytes_remaining -= event_length; | |
743 | } while (bytes_remaining > 0); | |
744 | ||
11fdf7f2 TL |
745 | return append_io_events(journal::EVENT_TYPE_AIO_WRITE, bufferlists, offset, |
746 | length, flush_entry, 0); | |
7c673cae FG |
747 | } |
748 | ||
749 | template <typename I> | |
750 | uint64_t Journal<I>::append_io_event(journal::EventEntry &&event_entry, | |
7c673cae | 751 | uint64_t offset, size_t length, |
b32b8144 | 752 | bool flush_entry, int filter_ret_val) { |
7c673cae FG |
753 | bufferlist bl; |
754 | event_entry.timestamp = ceph_clock_now(); | |
11fdf7f2 TL |
755 | encode(event_entry, bl); |
756 | return append_io_events(event_entry.get_event_type(), {bl}, offset, length, | |
757 | flush_entry, filter_ret_val); | |
7c673cae FG |
758 | } |
759 | ||
760 | template <typename I> | |
761 | uint64_t Journal<I>::append_io_events(journal::EventType event_type, | |
762 | const Bufferlists &bufferlists, | |
7c673cae | 763 | uint64_t offset, size_t length, |
b32b8144 | 764 | bool flush_entry, int filter_ret_val) { |
11fdf7f2 | 765 | ceph_assert(!bufferlists.empty()); |
7c673cae FG |
766 | |
767 | uint64_t tid; | |
768 | { | |
769 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 770 | ceph_assert(m_state == STATE_READY); |
7c673cae FG |
771 | |
772 | tid = ++m_event_tid; | |
11fdf7f2 | 773 | ceph_assert(tid != 0); |
7c673cae FG |
774 | } |
775 | ||
776 | Futures futures; | |
777 | for (auto &bl : bufferlists) { | |
11fdf7f2 | 778 | ceph_assert(bl.length() <= m_max_append_size); |
7c673cae FG |
779 | futures.push_back(m_journaler->append(m_tag_tid, bl)); |
780 | } | |
781 | ||
782 | { | |
783 | Mutex::Locker event_locker(m_event_lock); | |
11fdf7f2 | 784 | m_events[tid] = Event(futures, offset, length, filter_ret_val); |
7c673cae FG |
785 | } |
786 | ||
787 | CephContext *cct = m_image_ctx.cct; | |
788 | ldout(cct, 20) << this << " " << __func__ << ": " | |
789 | << "event=" << event_type << ", " | |
7c673cae FG |
790 | << "offset=" << offset << ", " |
791 | << "length=" << length << ", " | |
792 | << "flush=" << flush_entry << ", tid=" << tid << dendl; | |
793 | ||
794 | Context *on_safe = create_async_context_callback( | |
795 | m_image_ctx, new C_IOEventSafe(this, tid)); | |
796 | if (flush_entry) { | |
797 | futures.back().flush(on_safe); | |
798 | } else { | |
799 | futures.back().wait(on_safe); | |
800 | } | |
801 | ||
802 | return tid; | |
803 | } | |
804 | ||
805 | template <typename I> | |
806 | void Journal<I>::commit_io_event(uint64_t tid, int r) { | |
807 | CephContext *cct = m_image_ctx.cct; | |
808 | ldout(cct, 20) << this << " " << __func__ << ": tid=" << tid << ", " | |
809 | "r=" << r << dendl; | |
810 | ||
811 | Mutex::Locker event_locker(m_event_lock); | |
812 | typename Events::iterator it = m_events.find(tid); | |
813 | if (it == m_events.end()) { | |
814 | return; | |
815 | } | |
816 | complete_event(it, r); | |
817 | } | |
818 | ||
819 | template <typename I> | |
820 | void Journal<I>::commit_io_event_extent(uint64_t tid, uint64_t offset, | |
821 | uint64_t length, int r) { | |
11fdf7f2 | 822 | ceph_assert(length > 0); |
7c673cae FG |
823 | |
824 | CephContext *cct = m_image_ctx.cct; | |
825 | ldout(cct, 20) << this << " " << __func__ << ": tid=" << tid << ", " | |
826 | << "offset=" << offset << ", " | |
827 | << "length=" << length << ", " | |
828 | << "r=" << r << dendl; | |
829 | ||
830 | Mutex::Locker event_locker(m_event_lock); | |
831 | typename Events::iterator it = m_events.find(tid); | |
832 | if (it == m_events.end()) { | |
833 | return; | |
834 | } | |
835 | ||
836 | Event &event = it->second; | |
837 | if (event.ret_val == 0 && r < 0) { | |
838 | event.ret_val = r; | |
839 | } | |
840 | ||
841 | ExtentInterval extent; | |
842 | extent.insert(offset, length); | |
843 | ||
844 | ExtentInterval intersect; | |
845 | intersect.intersection_of(extent, event.pending_extents); | |
846 | ||
847 | event.pending_extents.subtract(intersect); | |
848 | if (!event.pending_extents.empty()) { | |
849 | ldout(cct, 20) << this << " " << __func__ << ": " | |
850 | << "pending extents: " << event.pending_extents << dendl; | |
851 | return; | |
852 | } | |
853 | complete_event(it, event.ret_val); | |
854 | } | |
855 | ||
856 | template <typename I> | |
857 | void Journal<I>::append_op_event(uint64_t op_tid, | |
858 | journal::EventEntry &&event_entry, | |
859 | Context *on_safe) { | |
11fdf7f2 | 860 | ceph_assert(m_image_ctx.owner_lock.is_locked()); |
7c673cae FG |
861 | |
862 | bufferlist bl; | |
863 | event_entry.timestamp = ceph_clock_now(); | |
11fdf7f2 | 864 | encode(event_entry, bl); |
7c673cae FG |
865 | |
866 | Future future; | |
867 | { | |
868 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 869 | ceph_assert(m_state == STATE_READY); |
7c673cae FG |
870 | |
871 | future = m_journaler->append(m_tag_tid, bl); | |
872 | ||
873 | // delay committing op event to ensure consistent replay | |
11fdf7f2 | 874 | ceph_assert(m_op_futures.count(op_tid) == 0); |
7c673cae FG |
875 | m_op_futures[op_tid] = future; |
876 | } | |
877 | ||
878 | on_safe = create_async_context_callback(m_image_ctx, on_safe); | |
879 | on_safe = new FunctionContext([this, on_safe](int r) { | |
880 | // ensure all committed IO before this op is committed | |
881 | m_journaler->flush_commit_position(on_safe); | |
882 | }); | |
883 | future.flush(on_safe); | |
884 | ||
885 | CephContext *cct = m_image_ctx.cct; | |
886 | ldout(cct, 10) << this << " " << __func__ << ": " | |
887 | << "op_tid=" << op_tid << ", " | |
888 | << "event=" << event_entry.get_event_type() << dendl; | |
889 | } | |
890 | ||
891 | template <typename I> | |
892 | void Journal<I>::commit_op_event(uint64_t op_tid, int r, Context *on_safe) { | |
893 | CephContext *cct = m_image_ctx.cct; | |
894 | ldout(cct, 10) << this << " " << __func__ << ": op_tid=" << op_tid << ", " | |
895 | << "r=" << r << dendl; | |
896 | ||
897 | journal::EventEntry event_entry((journal::OpFinishEvent(op_tid, r)), | |
898 | ceph_clock_now()); | |
899 | ||
900 | bufferlist bl; | |
11fdf7f2 | 901 | encode(event_entry, bl); |
7c673cae FG |
902 | |
903 | Future op_start_future; | |
904 | Future op_finish_future; | |
905 | { | |
906 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 907 | ceph_assert(m_state == STATE_READY); |
7c673cae FG |
908 | |
909 | // ready to commit op event | |
910 | auto it = m_op_futures.find(op_tid); | |
11fdf7f2 | 911 | ceph_assert(it != m_op_futures.end()); |
7c673cae FG |
912 | op_start_future = it->second; |
913 | m_op_futures.erase(it); | |
914 | ||
915 | op_finish_future = m_journaler->append(m_tag_tid, bl); | |
916 | } | |
917 | ||
918 | op_finish_future.flush(create_async_context_callback( | |
919 | m_image_ctx, new C_OpEventSafe(this, op_tid, op_start_future, | |
920 | op_finish_future, on_safe))); | |
921 | } | |
922 | ||
923 | template <typename I> | |
924 | void Journal<I>::replay_op_ready(uint64_t op_tid, Context *on_resume) { | |
925 | CephContext *cct = m_image_ctx.cct; | |
926 | ldout(cct, 10) << this << " " << __func__ << ": op_tid=" << op_tid << dendl; | |
927 | ||
928 | { | |
929 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 930 | ceph_assert(m_journal_replay != nullptr); |
7c673cae FG |
931 | m_journal_replay->replay_op_ready(op_tid, on_resume); |
932 | } | |
933 | } | |
934 | ||
935 | template <typename I> | |
936 | void Journal<I>::flush_event(uint64_t tid, Context *on_safe) { | |
937 | CephContext *cct = m_image_ctx.cct; | |
938 | ldout(cct, 20) << this << " " << __func__ << ": tid=" << tid << ", " | |
939 | << "on_safe=" << on_safe << dendl; | |
940 | ||
941 | Future future; | |
942 | { | |
943 | Mutex::Locker event_locker(m_event_lock); | |
944 | future = wait_event(m_lock, tid, on_safe); | |
945 | } | |
946 | ||
947 | if (future.is_valid()) { | |
948 | future.flush(nullptr); | |
949 | } | |
950 | } | |
951 | ||
952 | template <typename I> | |
953 | void Journal<I>::wait_event(uint64_t tid, Context *on_safe) { | |
954 | CephContext *cct = m_image_ctx.cct; | |
955 | ldout(cct, 20) << this << " " << __func__ << ": tid=" << tid << ", " | |
956 | << "on_safe=" << on_safe << dendl; | |
957 | ||
958 | Mutex::Locker event_locker(m_event_lock); | |
959 | wait_event(m_lock, tid, on_safe); | |
960 | } | |
961 | ||
962 | template <typename I> | |
963 | typename Journal<I>::Future Journal<I>::wait_event(Mutex &lock, uint64_t tid, | |
964 | Context *on_safe) { | |
11fdf7f2 | 965 | ceph_assert(m_event_lock.is_locked()); |
7c673cae FG |
966 | CephContext *cct = m_image_ctx.cct; |
967 | ||
968 | typename Events::iterator it = m_events.find(tid); | |
11fdf7f2 | 969 | ceph_assert(it != m_events.end()); |
7c673cae FG |
970 | |
971 | Event &event = it->second; | |
972 | if (event.safe) { | |
973 | // journal entry already safe | |
974 | ldout(cct, 20) << this << " " << __func__ << ": " | |
975 | << "journal entry already safe" << dendl; | |
976 | m_image_ctx.op_work_queue->queue(on_safe, event.ret_val); | |
977 | return Future(); | |
978 | } | |
979 | ||
980 | event.on_safe_contexts.push_back(create_async_context_callback(m_image_ctx, | |
981 | on_safe)); | |
982 | return event.futures.back(); | |
983 | } | |
984 | ||
985 | template <typename I> | |
986 | void Journal<I>::start_external_replay(journal::Replay<I> **journal_replay, | |
987 | Context *on_start) { | |
988 | CephContext *cct = m_image_ctx.cct; | |
989 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
990 | ||
991 | Mutex::Locker locker(m_lock); | |
11fdf7f2 TL |
992 | ceph_assert(m_state == STATE_READY); |
993 | ceph_assert(m_journal_replay == nullptr); | |
7c673cae FG |
994 | |
995 | on_start = util::create_async_context_callback(m_image_ctx, on_start); | |
996 | on_start = new FunctionContext( | |
997 | [this, journal_replay, on_start](int r) { | |
998 | handle_start_external_replay(r, journal_replay, on_start); | |
999 | }); | |
1000 | ||
1001 | // safely flush all in-flight events before starting external replay | |
1002 | m_journaler->stop_append(util::create_async_context_callback(m_image_ctx, | |
1003 | on_start)); | |
1004 | } | |
1005 | ||
1006 | template <typename I> | |
1007 | void Journal<I>::handle_start_external_replay(int r, | |
1008 | journal::Replay<I> **journal_replay, | |
1009 | Context *on_finish) { | |
1010 | CephContext *cct = m_image_ctx.cct; | |
1011 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1012 | ||
1013 | Mutex::Locker locker(m_lock); | |
11fdf7f2 TL |
1014 | ceph_assert(m_state == STATE_READY); |
1015 | ceph_assert(m_journal_replay == nullptr); | |
7c673cae FG |
1016 | |
1017 | if (r < 0) { | |
1018 | lderr(cct) << this << " " << __func__ << ": " | |
1019 | << "failed to stop recording: " << cpp_strerror(r) << dendl; | |
1020 | *journal_replay = nullptr; | |
1021 | ||
1022 | // get back to a sane-state | |
1023 | start_append(); | |
1024 | on_finish->complete(r); | |
1025 | return; | |
1026 | } | |
1027 | ||
1028 | transition_state(STATE_REPLAYING, 0); | |
1029 | m_journal_replay = journal::Replay<I>::create(m_image_ctx); | |
1030 | *journal_replay = m_journal_replay; | |
1031 | on_finish->complete(0); | |
1032 | } | |
1033 | ||
1034 | template <typename I> | |
1035 | void Journal<I>::stop_external_replay() { | |
1036 | CephContext *cct = m_image_ctx.cct; | |
1037 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1038 | ||
1039 | Mutex::Locker locker(m_lock); | |
11fdf7f2 TL |
1040 | ceph_assert(m_journal_replay != nullptr); |
1041 | ceph_assert(m_state == STATE_REPLAYING); | |
7c673cae FG |
1042 | |
1043 | delete m_journal_replay; | |
1044 | m_journal_replay = nullptr; | |
1045 | ||
1046 | if (m_close_pending) { | |
1047 | destroy_journaler(0); | |
1048 | return; | |
1049 | } | |
1050 | ||
1051 | start_append(); | |
1052 | } | |
1053 | ||
1054 | template <typename I> | |
1055 | void Journal<I>::create_journaler() { | |
1056 | CephContext *cct = m_image_ctx.cct; | |
1057 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1058 | ||
11fdf7f2 TL |
1059 | ceph_assert(m_lock.is_locked()); |
1060 | ceph_assert(m_state == STATE_UNINITIALIZED || m_state == STATE_RESTARTING_REPLAY); | |
1061 | ceph_assert(m_journaler == NULL); | |
7c673cae FG |
1062 | |
1063 | transition_state(STATE_INITIALIZING, 0); | |
1064 | ::journal::Settings settings; | |
11fdf7f2 TL |
1065 | settings.commit_interval = |
1066 | m_image_ctx.config.template get_val<double>("rbd_journal_commit_age"); | |
1067 | settings.max_payload_bytes = | |
1068 | m_image_ctx.config.template get_val<Option::size_t>("rbd_journal_max_payload_bytes"); | |
7c673cae | 1069 | settings.max_concurrent_object_sets = |
11fdf7f2 | 1070 | m_image_ctx.config.template get_val<uint64_t>("rbd_journal_max_concurrent_object_sets"); |
7c673cae FG |
1071 | // TODO: a configurable filter to exclude certain peers from being |
1072 | // disconnected. | |
1073 | settings.whitelisted_laggy_clients = {IMAGE_CLIENT_ID}; | |
1074 | ||
1075 | m_journaler = new Journaler(m_work_queue, m_timer, m_timer_lock, | |
1076 | m_image_ctx.md_ctx, m_image_ctx.id, | |
1077 | IMAGE_CLIENT_ID, settings); | |
1078 | m_journaler->add_listener(&m_metadata_listener); | |
1079 | ||
1080 | Context *ctx = create_async_context_callback( | |
1081 | m_image_ctx, create_context_callback< | |
1082 | Journal<I>, &Journal<I>::handle_open>(this)); | |
1083 | auto open_req = journal::OpenRequest<I>::create(&m_image_ctx, m_journaler, | |
1084 | &m_lock, &m_client_meta, | |
1085 | &m_tag_tid, &m_tag_data, ctx); | |
1086 | open_req->send(); | |
1087 | } | |
1088 | ||
1089 | template <typename I> | |
1090 | void Journal<I>::destroy_journaler(int r) { | |
1091 | CephContext *cct = m_image_ctx.cct; | |
1092 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1093 | ||
11fdf7f2 | 1094 | ceph_assert(m_lock.is_locked()); |
7c673cae FG |
1095 | |
1096 | delete m_journal_replay; | |
1097 | m_journal_replay = NULL; | |
1098 | ||
1099 | m_journaler->remove_listener(&m_metadata_listener); | |
1100 | ||
1101 | transition_state(STATE_CLOSING, r); | |
1102 | ||
1103 | Context *ctx = create_async_context_callback( | |
1104 | m_image_ctx, create_context_callback< | |
1105 | Journal<I>, &Journal<I>::handle_journal_destroyed>(this)); | |
1106 | ctx = new FunctionContext( | |
1107 | [this, ctx](int r) { | |
1108 | Mutex::Locker locker(m_lock); | |
1109 | m_journaler->shut_down(ctx); | |
1110 | }); | |
1111 | m_async_journal_op_tracker.wait(m_image_ctx, ctx); | |
1112 | } | |
1113 | ||
1114 | template <typename I> | |
1115 | void Journal<I>::recreate_journaler(int r) { | |
1116 | CephContext *cct = m_image_ctx.cct; | |
1117 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1118 | ||
11fdf7f2 TL |
1119 | ceph_assert(m_lock.is_locked()); |
1120 | ceph_assert(m_state == STATE_FLUSHING_RESTART || | |
1121 | m_state == STATE_FLUSHING_REPLAY); | |
7c673cae FG |
1122 | |
1123 | delete m_journal_replay; | |
1124 | m_journal_replay = NULL; | |
1125 | ||
1126 | m_journaler->remove_listener(&m_metadata_listener); | |
1127 | ||
1128 | transition_state(STATE_RESTARTING_REPLAY, r); | |
1129 | m_journaler->shut_down(create_async_context_callback( | |
1130 | m_image_ctx, create_context_callback< | |
1131 | Journal<I>, &Journal<I>::handle_journal_destroyed>(this))); | |
1132 | } | |
1133 | ||
1134 | template <typename I> | |
1135 | void Journal<I>::complete_event(typename Events::iterator it, int r) { | |
11fdf7f2 TL |
1136 | ceph_assert(m_event_lock.is_locked()); |
1137 | ceph_assert(m_state == STATE_READY); | |
7c673cae FG |
1138 | |
1139 | CephContext *cct = m_image_ctx.cct; | |
1140 | ldout(cct, 20) << this << " " << __func__ << ": tid=" << it->first << " " | |
1141 | << "r=" << r << dendl; | |
1142 | ||
1143 | Event &event = it->second; | |
b32b8144 FG |
1144 | if (r < 0 && r == event.filter_ret_val) { |
1145 | // ignore allowed error codes | |
1146 | r = 0; | |
1147 | } | |
7c673cae FG |
1148 | if (r < 0) { |
1149 | // event recorded to journal but failed to update disk, we cannot | |
1150 | // commit this IO event. this event must be replayed. | |
11fdf7f2 | 1151 | ceph_assert(event.safe); |
7c673cae FG |
1152 | lderr(cct) << this << " " << __func__ << ": " |
1153 | << "failed to commit IO to disk, replay required: " | |
1154 | << cpp_strerror(r) << dendl; | |
1155 | } | |
1156 | ||
1157 | event.committed_io = true; | |
1158 | if (event.safe) { | |
1159 | if (r >= 0) { | |
1160 | for (auto &future : event.futures) { | |
1161 | m_journaler->committed(future); | |
1162 | } | |
1163 | } | |
1164 | m_events.erase(it); | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | template <typename I> | |
1169 | void Journal<I>::start_append() { | |
11fdf7f2 TL |
1170 | ceph_assert(m_lock.is_locked()); |
1171 | m_journaler->start_append( | |
1172 | m_image_ctx.config.template get_val<uint64_t>("rbd_journal_object_flush_interval"), | |
1173 | m_image_ctx.config.template get_val<Option::size_t>("rbd_journal_object_flush_bytes"), | |
1174 | m_image_ctx.config.template get_val<double>("rbd_journal_object_flush_age"), | |
1175 | m_image_ctx.config.template get_val<uint64_t>("rbd_journal_object_max_in_flight_appends")); | |
7c673cae FG |
1176 | transition_state(STATE_READY, 0); |
1177 | } | |
1178 | ||
1179 | template <typename I> | |
1180 | void Journal<I>::handle_open(int r) { | |
1181 | CephContext *cct = m_image_ctx.cct; | |
1182 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1183 | ||
1184 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 1185 | ceph_assert(m_state == STATE_INITIALIZING); |
7c673cae FG |
1186 | |
1187 | if (r < 0) { | |
1188 | lderr(cct) << this << " " << __func__ << ": " | |
1189 | << "failed to initialize journal: " << cpp_strerror(r) | |
1190 | << dendl; | |
1191 | destroy_journaler(r); | |
1192 | return; | |
1193 | } | |
1194 | ||
1195 | m_tag_class = m_client_meta.tag_class; | |
1196 | m_max_append_size = m_journaler->get_max_append_size(); | |
1197 | ldout(cct, 20) << this << " " << __func__ << ": " | |
1198 | << "tag_class=" << m_tag_class << ", " | |
1199 | << "max_append_size=" << m_max_append_size << dendl; | |
1200 | ||
1201 | transition_state(STATE_REPLAYING, 0); | |
1202 | m_journal_replay = journal::Replay<I>::create(m_image_ctx); | |
1203 | m_journaler->start_replay(&m_replay_handler); | |
1204 | } | |
1205 | ||
1206 | template <typename I> | |
1207 | void Journal<I>::handle_replay_ready() { | |
1208 | CephContext *cct = m_image_ctx.cct; | |
1209 | ReplayEntry replay_entry; | |
1210 | { | |
1211 | Mutex::Locker locker(m_lock); | |
1212 | if (m_state != STATE_REPLAYING) { | |
1213 | return; | |
1214 | } | |
1215 | ||
1216 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1217 | if (!m_journaler->try_pop_front(&replay_entry)) { | |
1218 | return; | |
1219 | } | |
1220 | ||
1221 | // only one entry should be in-flight at a time | |
11fdf7f2 | 1222 | ceph_assert(!m_processing_entry); |
7c673cae FG |
1223 | m_processing_entry = true; |
1224 | } | |
1225 | ||
1226 | bufferlist data = replay_entry.get_data(); | |
11fdf7f2 | 1227 | auto it = data.cbegin(); |
7c673cae FG |
1228 | |
1229 | journal::EventEntry event_entry; | |
1230 | int r = m_journal_replay->decode(&it, &event_entry); | |
1231 | if (r < 0) { | |
1232 | lderr(cct) << this << " " << __func__ << ": " | |
1233 | << "failed to decode journal event entry" << dendl; | |
1234 | handle_replay_process_safe(replay_entry, r); | |
1235 | return; | |
1236 | } | |
1237 | ||
1238 | Context *on_ready = create_context_callback< | |
1239 | Journal<I>, &Journal<I>::handle_replay_process_ready>(this); | |
1240 | Context *on_commit = new C_ReplayProcessSafe(this, std::move(replay_entry)); | |
1241 | m_journal_replay->process(event_entry, on_ready, on_commit); | |
1242 | } | |
1243 | ||
1244 | template <typename I> | |
1245 | void Journal<I>::handle_replay_complete(int r) { | |
1246 | CephContext *cct = m_image_ctx.cct; | |
1247 | ||
1248 | bool cancel_ops = false; | |
1249 | { | |
1250 | Mutex::Locker locker(m_lock); | |
1251 | if (m_state != STATE_REPLAYING) { | |
1252 | return; | |
1253 | } | |
1254 | ||
1255 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1256 | if (r < 0) { | |
1257 | cancel_ops = true; | |
1258 | transition_state(STATE_FLUSHING_RESTART, r); | |
1259 | } else { | |
1260 | // state might change back to FLUSHING_RESTART on flush error | |
1261 | transition_state(STATE_FLUSHING_REPLAY, 0); | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | Context *ctx = new FunctionContext([this, cct](int r) { | |
1266 | ldout(cct, 20) << this << " handle_replay_complete: " | |
1267 | << "handle shut down replay" << dendl; | |
1268 | ||
1269 | State state; | |
1270 | { | |
1271 | Mutex::Locker locker(m_lock); | |
11fdf7f2 TL |
1272 | ceph_assert(m_state == STATE_FLUSHING_RESTART || |
1273 | m_state == STATE_FLUSHING_REPLAY); | |
7c673cae FG |
1274 | state = m_state; |
1275 | } | |
1276 | ||
1277 | if (state == STATE_FLUSHING_RESTART) { | |
1278 | handle_flushing_restart(0); | |
1279 | } else { | |
1280 | handle_flushing_replay(); | |
1281 | } | |
1282 | }); | |
94b18763 FG |
1283 | ctx = new FunctionContext([this, ctx](int r) { |
1284 | // ensure the commit position is flushed to disk | |
1285 | m_journaler->flush_commit_position(ctx); | |
1286 | }); | |
7c673cae FG |
1287 | ctx = new FunctionContext([this, cct, cancel_ops, ctx](int r) { |
1288 | ldout(cct, 20) << this << " handle_replay_complete: " | |
1289 | << "shut down replay" << dendl; | |
1290 | m_journal_replay->shut_down(cancel_ops, ctx); | |
1291 | }); | |
1292 | m_journaler->stop_replay(ctx); | |
1293 | } | |
1294 | ||
1295 | template <typename I> | |
1296 | void Journal<I>::handle_replay_process_ready(int r) { | |
1297 | // journal::Replay is ready for more events -- attempt to pop another | |
1298 | CephContext *cct = m_image_ctx.cct; | |
1299 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1300 | ||
11fdf7f2 | 1301 | ceph_assert(r == 0); |
7c673cae FG |
1302 | { |
1303 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 1304 | ceph_assert(m_processing_entry); |
7c673cae FG |
1305 | m_processing_entry = false; |
1306 | } | |
1307 | handle_replay_ready(); | |
1308 | } | |
1309 | ||
1310 | template <typename I> | |
1311 | void Journal<I>::handle_replay_process_safe(ReplayEntry replay_entry, int r) { | |
1312 | CephContext *cct = m_image_ctx.cct; | |
1313 | ||
1314 | m_lock.Lock(); | |
11fdf7f2 TL |
1315 | ceph_assert(m_state == STATE_REPLAYING || |
1316 | m_state == STATE_FLUSHING_RESTART || | |
1317 | m_state == STATE_FLUSHING_REPLAY); | |
7c673cae FG |
1318 | |
1319 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1320 | if (r < 0) { | |
31f18b77 FG |
1321 | if (r != -ECANCELED) { |
1322 | lderr(cct) << this << " " << __func__ << ": " | |
1323 | << "failed to commit journal event to disk: " | |
1324 | << cpp_strerror(r) << dendl; | |
1325 | } | |
7c673cae FG |
1326 | |
1327 | if (m_state == STATE_REPLAYING) { | |
1328 | // abort the replay if we have an error | |
1329 | transition_state(STATE_FLUSHING_RESTART, r); | |
1330 | m_lock.Unlock(); | |
1331 | ||
1332 | // stop replay, shut down, and restart | |
94b18763 FG |
1333 | Context* ctx = create_context_callback< |
1334 | Journal<I>, &Journal<I>::handle_flushing_restart>(this); | |
1335 | ctx = new FunctionContext([this, ctx](int r) { | |
1336 | // ensure the commit position is flushed to disk | |
1337 | m_journaler->flush_commit_position(ctx); | |
1338 | }); | |
1339 | ctx = new FunctionContext([this, cct, ctx](int r) { | |
7c673cae FG |
1340 | ldout(cct, 20) << this << " handle_replay_process_safe: " |
1341 | << "shut down replay" << dendl; | |
1342 | { | |
1343 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 1344 | ceph_assert(m_state == STATE_FLUSHING_RESTART); |
7c673cae FG |
1345 | } |
1346 | ||
94b18763 | 1347 | m_journal_replay->shut_down(true, ctx); |
7c673cae FG |
1348 | }); |
1349 | m_journaler->stop_replay(ctx); | |
1350 | return; | |
1351 | } else if (m_state == STATE_FLUSHING_REPLAY) { | |
1352 | // end-of-replay flush in-progress -- we need to restart replay | |
1353 | transition_state(STATE_FLUSHING_RESTART, r); | |
1354 | m_lock.Unlock(); | |
1355 | return; | |
1356 | } | |
1357 | } else { | |
1358 | // only commit the entry if written successfully | |
1359 | m_journaler->committed(replay_entry); | |
1360 | } | |
1361 | m_lock.Unlock(); | |
1362 | } | |
1363 | ||
1364 | template <typename I> | |
1365 | void Journal<I>::handle_flushing_restart(int r) { | |
1366 | Mutex::Locker locker(m_lock); | |
1367 | ||
1368 | CephContext *cct = m_image_ctx.cct; | |
1369 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1370 | ||
11fdf7f2 TL |
1371 | ceph_assert(r == 0); |
1372 | ceph_assert(m_state == STATE_FLUSHING_RESTART); | |
7c673cae FG |
1373 | if (m_close_pending) { |
1374 | destroy_journaler(r); | |
1375 | return; | |
1376 | } | |
1377 | ||
1378 | recreate_journaler(r); | |
1379 | } | |
1380 | ||
1381 | template <typename I> | |
1382 | void Journal<I>::handle_flushing_replay() { | |
1383 | Mutex::Locker locker(m_lock); | |
1384 | ||
1385 | CephContext *cct = m_image_ctx.cct; | |
1386 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1387 | ||
11fdf7f2 TL |
1388 | ceph_assert(m_state == STATE_FLUSHING_REPLAY || |
1389 | m_state == STATE_FLUSHING_RESTART); | |
7c673cae FG |
1390 | if (m_close_pending) { |
1391 | destroy_journaler(0); | |
1392 | return; | |
1393 | } else if (m_state == STATE_FLUSHING_RESTART) { | |
1394 | // failed to replay one-or-more events -- restart | |
1395 | recreate_journaler(0); | |
1396 | return; | |
1397 | } | |
1398 | ||
1399 | delete m_journal_replay; | |
1400 | m_journal_replay = NULL; | |
1401 | ||
1402 | m_error_result = 0; | |
1403 | start_append(); | |
1404 | } | |
1405 | ||
1406 | template <typename I> | |
1407 | void Journal<I>::handle_recording_stopped(int r) { | |
1408 | CephContext *cct = m_image_ctx.cct; | |
1409 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1410 | ||
1411 | Mutex::Locker locker(m_lock); | |
11fdf7f2 | 1412 | ceph_assert(m_state == STATE_STOPPING); |
7c673cae FG |
1413 | |
1414 | destroy_journaler(r); | |
1415 | } | |
1416 | ||
1417 | template <typename I> | |
1418 | void Journal<I>::handle_journal_destroyed(int r) { | |
1419 | CephContext *cct = m_image_ctx.cct; | |
1420 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << dendl; | |
1421 | ||
1422 | if (r < 0) { | |
1423 | lderr(cct) << this << " " << __func__ | |
1424 | << "error detected while closing journal: " << cpp_strerror(r) | |
1425 | << dendl; | |
1426 | } | |
1427 | ||
1428 | Mutex::Locker locker(m_lock); | |
1429 | delete m_journaler; | |
1430 | m_journaler = nullptr; | |
1431 | ||
11fdf7f2 | 1432 | ceph_assert(m_state == STATE_CLOSING || m_state == STATE_RESTARTING_REPLAY); |
7c673cae FG |
1433 | if (m_state == STATE_RESTARTING_REPLAY) { |
1434 | create_journaler(); | |
1435 | return; | |
1436 | } | |
1437 | ||
1438 | transition_state(STATE_CLOSED, r); | |
1439 | } | |
1440 | ||
1441 | template <typename I> | |
1442 | void Journal<I>::handle_io_event_safe(int r, uint64_t tid) { | |
1443 | CephContext *cct = m_image_ctx.cct; | |
1444 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << ", " | |
1445 | << "tid=" << tid << dendl; | |
1446 | ||
1447 | // journal will be flushed before closing | |
11fdf7f2 | 1448 | ceph_assert(m_state == STATE_READY || m_state == STATE_STOPPING); |
7c673cae FG |
1449 | if (r < 0) { |
1450 | lderr(cct) << this << " " << __func__ << ": " | |
1451 | << "failed to commit IO event: " << cpp_strerror(r) << dendl; | |
1452 | } | |
1453 | ||
7c673cae FG |
1454 | Contexts on_safe_contexts; |
1455 | { | |
1456 | Mutex::Locker event_locker(m_event_lock); | |
1457 | typename Events::iterator it = m_events.find(tid); | |
11fdf7f2 | 1458 | ceph_assert(it != m_events.end()); |
7c673cae FG |
1459 | |
1460 | Event &event = it->second; | |
7c673cae FG |
1461 | on_safe_contexts.swap(event.on_safe_contexts); |
1462 | ||
1463 | if (r < 0 || event.committed_io) { | |
1464 | // failed journal write so IO won't be sent -- or IO extent was | |
1465 | // overwritten by future IO operations so this was a no-op IO event | |
1466 | event.ret_val = r; | |
1467 | for (auto &future : event.futures) { | |
1468 | m_journaler->committed(future); | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | if (event.committed_io) { | |
1473 | m_events.erase(it); | |
1474 | } else { | |
1475 | event.safe = true; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | ldout(cct, 20) << this << " " << __func__ << ": " | |
1480 | << "completing tid=" << tid << dendl; | |
7c673cae FG |
1481 | |
1482 | // alert the cache about the journal event status | |
1483 | for (Contexts::iterator it = on_safe_contexts.begin(); | |
1484 | it != on_safe_contexts.end(); ++it) { | |
1485 | (*it)->complete(r); | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | template <typename I> | |
1490 | void Journal<I>::handle_op_event_safe(int r, uint64_t tid, | |
1491 | const Future &op_start_future, | |
1492 | const Future &op_finish_future, | |
1493 | Context *on_safe) { | |
1494 | CephContext *cct = m_image_ctx.cct; | |
1495 | ldout(cct, 20) << this << " " << __func__ << ": r=" << r << ", " | |
1496 | << "tid=" << tid << dendl; | |
1497 | ||
1498 | // journal will be flushed before closing | |
11fdf7f2 | 1499 | ceph_assert(m_state == STATE_READY || m_state == STATE_STOPPING); |
7c673cae FG |
1500 | if (r < 0) { |
1501 | lderr(cct) << this << " " << __func__ << ": " | |
1502 | << "failed to commit op event: " << cpp_strerror(r) << dendl; | |
1503 | } | |
1504 | ||
1505 | m_journaler->committed(op_start_future); | |
1506 | m_journaler->committed(op_finish_future); | |
1507 | ||
1508 | // reduce the replay window after committing an op event | |
1509 | m_journaler->flush_commit_position(on_safe); | |
1510 | } | |
1511 | ||
1512 | template <typename I> | |
1513 | void Journal<I>::stop_recording() { | |
11fdf7f2 TL |
1514 | ceph_assert(m_lock.is_locked()); |
1515 | ceph_assert(m_journaler != NULL); | |
7c673cae | 1516 | |
11fdf7f2 | 1517 | ceph_assert(m_state == STATE_READY); |
7c673cae FG |
1518 | transition_state(STATE_STOPPING, 0); |
1519 | ||
1520 | m_journaler->stop_append(util::create_async_context_callback( | |
1521 | m_image_ctx, create_context_callback< | |
1522 | Journal<I>, &Journal<I>::handle_recording_stopped>(this))); | |
1523 | } | |
1524 | ||
1525 | template <typename I> | |
1526 | void Journal<I>::transition_state(State state, int r) { | |
1527 | CephContext *cct = m_image_ctx.cct; | |
1528 | ldout(cct, 20) << this << " " << __func__ << ": new state=" << state << dendl; | |
11fdf7f2 | 1529 | ceph_assert(m_lock.is_locked()); |
7c673cae FG |
1530 | m_state = state; |
1531 | ||
1532 | if (m_error_result == 0 && r < 0) { | |
1533 | m_error_result = r; | |
1534 | } | |
1535 | ||
1536 | if (is_steady_state()) { | |
1537 | Contexts wait_for_state_contexts(std::move(m_wait_for_state_contexts)); | |
1538 | for (auto ctx : wait_for_state_contexts) { | |
1539 | ctx->complete(m_error_result); | |
1540 | } | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | template <typename I> | |
1545 | bool Journal<I>::is_steady_state() const { | |
11fdf7f2 | 1546 | ceph_assert(m_lock.is_locked()); |
7c673cae FG |
1547 | switch (m_state) { |
1548 | case STATE_READY: | |
1549 | case STATE_CLOSED: | |
1550 | return true; | |
1551 | case STATE_UNINITIALIZED: | |
1552 | case STATE_INITIALIZING: | |
1553 | case STATE_REPLAYING: | |
1554 | case STATE_FLUSHING_RESTART: | |
1555 | case STATE_RESTARTING_REPLAY: | |
1556 | case STATE_FLUSHING_REPLAY: | |
1557 | case STATE_STOPPING: | |
1558 | case STATE_CLOSING: | |
1559 | break; | |
1560 | } | |
1561 | return false; | |
1562 | } | |
1563 | ||
1564 | template <typename I> | |
1565 | void Journal<I>::wait_for_steady_state(Context *on_state) { | |
11fdf7f2 TL |
1566 | ceph_assert(m_lock.is_locked()); |
1567 | ceph_assert(!is_steady_state()); | |
7c673cae FG |
1568 | |
1569 | CephContext *cct = m_image_ctx.cct; | |
1570 | ldout(cct, 20) << this << " " << __func__ << ": on_state=" << on_state | |
1571 | << dendl; | |
1572 | m_wait_for_state_contexts.push_back(on_state); | |
1573 | } | |
1574 | ||
1575 | template <typename I> | |
1576 | int Journal<I>::is_resync_requested(bool *do_resync) { | |
1577 | Mutex::Locker l(m_lock); | |
1578 | return check_resync_requested(do_resync); | |
1579 | } | |
1580 | ||
1581 | template <typename I> | |
1582 | int Journal<I>::check_resync_requested(bool *do_resync) { | |
1583 | CephContext *cct = m_image_ctx.cct; | |
1584 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1585 | ||
11fdf7f2 TL |
1586 | ceph_assert(m_lock.is_locked()); |
1587 | ceph_assert(do_resync != nullptr); | |
7c673cae FG |
1588 | |
1589 | cls::journal::Client client; | |
1590 | int r = m_journaler->get_cached_client(IMAGE_CLIENT_ID, &client); | |
1591 | if (r < 0) { | |
1592 | lderr(cct) << this << " " << __func__ << ": " | |
1593 | << "failed to retrieve client: " << cpp_strerror(r) << dendl; | |
1594 | return r; | |
1595 | } | |
1596 | ||
1597 | librbd::journal::ClientData client_data; | |
11fdf7f2 | 1598 | auto bl_it = client.data.cbegin(); |
7c673cae | 1599 | try { |
11fdf7f2 | 1600 | decode(client_data, bl_it); |
7c673cae FG |
1601 | } catch (const buffer::error &err) { |
1602 | lderr(cct) << this << " " << __func__ << ": " | |
1603 | << "failed to decode client data: " << err << dendl; | |
1604 | return -EINVAL; | |
1605 | } | |
1606 | ||
1607 | journal::ImageClientMeta *image_client_meta = | |
1608 | boost::get<journal::ImageClientMeta>(&client_data.client_meta); | |
1609 | if (image_client_meta == nullptr) { | |
1610 | lderr(cct) << this << " " << __func__ << ": " | |
1611 | << "failed to access image client meta struct" << dendl; | |
1612 | return -EINVAL; | |
1613 | } | |
1614 | ||
1615 | *do_resync = image_client_meta->resync_requested; | |
1616 | ||
1617 | return 0; | |
1618 | } | |
1619 | ||
1620 | struct C_RefreshTags : public Context { | |
1621 | util::AsyncOpTracker &async_op_tracker; | |
1622 | Context *on_finish = nullptr; | |
1623 | ||
1624 | Mutex lock; | |
11fdf7f2 | 1625 | uint64_t tag_tid = 0; |
7c673cae FG |
1626 | journal::TagData tag_data; |
1627 | ||
11fdf7f2 | 1628 | explicit C_RefreshTags(util::AsyncOpTracker &async_op_tracker) |
7c673cae FG |
1629 | : async_op_tracker(async_op_tracker), |
1630 | lock("librbd::Journal::C_RefreshTags::lock") { | |
1631 | async_op_tracker.start_op(); | |
1632 | } | |
1633 | ~C_RefreshTags() override { | |
1634 | async_op_tracker.finish_op(); | |
1635 | } | |
1636 | ||
1637 | void finish(int r) override { | |
1638 | on_finish->complete(r); | |
1639 | } | |
1640 | }; | |
1641 | ||
1642 | template <typename I> | |
1643 | void Journal<I>::handle_metadata_updated() { | |
1644 | CephContext *cct = m_image_ctx.cct; | |
1645 | Mutex::Locker locker(m_lock); | |
1646 | ||
1647 | if (m_state != STATE_READY && !is_journal_replaying(m_lock)) { | |
1648 | return; | |
1649 | } else if (is_tag_owner(m_lock)) { | |
1650 | ldout(cct, 20) << this << " " << __func__ << ": primary image" << dendl; | |
1651 | return; | |
1652 | } else if (m_listeners.empty()) { | |
1653 | ldout(cct, 20) << this << " " << __func__ << ": no listeners" << dendl; | |
1654 | return; | |
1655 | } | |
1656 | ||
1657 | uint64_t refresh_sequence = ++m_refresh_sequence; | |
1658 | ldout(cct, 20) << this << " " << __func__ << ": " | |
1659 | << "refresh_sequence=" << refresh_sequence << dendl; | |
1660 | ||
1661 | // pull the most recent tags from the journal, decode, and | |
1662 | // update the internal tag state | |
1663 | C_RefreshTags *refresh_ctx = new C_RefreshTags(m_async_journal_op_tracker); | |
1664 | refresh_ctx->on_finish = new FunctionContext( | |
1665 | [this, refresh_sequence, refresh_ctx](int r) { | |
1666 | handle_refresh_metadata(refresh_sequence, refresh_ctx->tag_tid, | |
1667 | refresh_ctx->tag_data, r); | |
1668 | }); | |
1669 | C_DecodeTags *decode_tags_ctx = new C_DecodeTags( | |
1670 | cct, &refresh_ctx->lock, &refresh_ctx->tag_tid, | |
1671 | &refresh_ctx->tag_data, refresh_ctx); | |
1672 | m_journaler->get_tags(m_tag_tid == 0 ? 0 : m_tag_tid - 1, m_tag_class, | |
1673 | &decode_tags_ctx->tags, decode_tags_ctx); | |
1674 | } | |
1675 | ||
1676 | template <typename I> | |
1677 | void Journal<I>::handle_refresh_metadata(uint64_t refresh_sequence, | |
1678 | uint64_t tag_tid, | |
1679 | journal::TagData tag_data, int r) { | |
1680 | CephContext *cct = m_image_ctx.cct; | |
1681 | Mutex::Locker locker(m_lock); | |
1682 | ||
1683 | if (r < 0) { | |
1684 | lderr(cct) << this << " " << __func__ << ": failed to refresh metadata: " | |
1685 | << cpp_strerror(r) << dendl; | |
1686 | return; | |
1687 | } else if (m_state != STATE_READY && !is_journal_replaying(m_lock)) { | |
1688 | return; | |
1689 | } else if (refresh_sequence != m_refresh_sequence) { | |
1690 | // another, more up-to-date refresh is in-flight | |
1691 | return; | |
1692 | } | |
1693 | ||
1694 | ldout(cct, 20) << this << " " << __func__ << ": " | |
1695 | << "refresh_sequence=" << refresh_sequence << ", " | |
1696 | << "tag_tid=" << tag_tid << ", " | |
1697 | << "tag_data=" << tag_data << dendl; | |
1698 | while (m_listener_notify) { | |
1699 | m_listener_cond.Wait(m_lock); | |
1700 | } | |
1701 | ||
1702 | bool was_tag_owner = is_tag_owner(m_lock); | |
1703 | if (m_tag_tid < tag_tid) { | |
1704 | m_tag_tid = tag_tid; | |
1705 | m_tag_data = tag_data; | |
1706 | } | |
1707 | bool promoted_to_primary = (!was_tag_owner && is_tag_owner(m_lock)); | |
1708 | ||
1709 | bool resync_requested = false; | |
1710 | r = check_resync_requested(&resync_requested); | |
1711 | if (r < 0) { | |
1712 | lderr(cct) << this << " " << __func__ << ": " | |
1713 | << "failed to check if a resync was requested" << dendl; | |
1714 | return; | |
1715 | } | |
1716 | ||
1717 | Listeners listeners(m_listeners); | |
1718 | m_listener_notify = true; | |
1719 | m_lock.Unlock(); | |
1720 | ||
1721 | if (promoted_to_primary) { | |
1722 | for (auto listener : listeners) { | |
1723 | listener->handle_promoted(); | |
1724 | } | |
1725 | } else if (resync_requested) { | |
1726 | for (auto listener : listeners) { | |
1727 | listener->handle_resync(); | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | m_lock.Lock(); | |
1732 | m_listener_notify = false; | |
1733 | m_listener_cond.Signal(); | |
1734 | } | |
1735 | ||
1736 | template <typename I> | |
1737 | void Journal<I>::add_listener(journal::Listener *listener) { | |
1738 | Mutex::Locker locker(m_lock); | |
1739 | m_listeners.insert(listener); | |
1740 | } | |
1741 | ||
1742 | template <typename I> | |
1743 | void Journal<I>::remove_listener(journal::Listener *listener) { | |
1744 | Mutex::Locker locker(m_lock); | |
1745 | while (m_listener_notify) { | |
1746 | m_listener_cond.Wait(m_lock); | |
1747 | } | |
1748 | m_listeners.erase(listener); | |
1749 | } | |
1750 | ||
1751 | } // namespace librbd | |
1752 | ||
1753 | #ifndef TEST_F | |
1754 | template class librbd::Journal<librbd::ImageCtx>; | |
1755 | #endif |