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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include "PoolReplayer.h" | |
5 | #include <boost/bind.hpp> | |
6 | #include "common/Formatter.h" | |
7 | #include "common/admin_socket.h" | |
8 | #include "common/ceph_argparse.h" | |
9 | #include "common/code_environment.h" | |
10 | #include "common/common_init.h" | |
11 | #include "common/debug.h" | |
12 | #include "common/errno.h" | |
13 | #include "include/stringify.h" | |
14 | #include "cls/rbd/cls_rbd_client.h" | |
15 | #include "global/global_context.h" | |
16 | #include "librbd/internal.h" | |
17 | #include "librbd/Utils.h" | |
18 | #include "librbd/Watcher.h" | |
19 | #include "librbd/api/Mirror.h" | |
20 | #include "InstanceReplayer.h" | |
21 | #include "InstanceWatcher.h" | |
22 | #include "LeaderWatcher.h" | |
23 | #include "Threads.h" | |
24 | ||
25 | #define dout_context g_ceph_context | |
26 | #define dout_subsys ceph_subsys_rbd_mirror | |
27 | #undef dout_prefix | |
28 | #define dout_prefix *_dout << "rbd::mirror::PoolReplayer: " \ | |
29 | << this << " " << __func__ << ": " | |
30 | ||
31 | using std::chrono::seconds; | |
32 | using std::map; | |
33 | using std::string; | |
34 | using std::unique_ptr; | |
35 | using std::vector; | |
36 | ||
37 | using librbd::cls_client::dir_get_name; | |
38 | using librbd::util::create_async_context_callback; | |
39 | ||
40 | namespace rbd { | |
41 | namespace mirror { | |
42 | ||
43 | namespace { | |
44 | ||
45 | class PoolReplayerAdminSocketCommand { | |
46 | public: | |
47 | PoolReplayerAdminSocketCommand(PoolReplayer *pool_replayer) | |
48 | : pool_replayer(pool_replayer) { | |
49 | } | |
50 | virtual ~PoolReplayerAdminSocketCommand() {} | |
51 | virtual bool call(Formatter *f, stringstream *ss) = 0; | |
52 | protected: | |
53 | PoolReplayer *pool_replayer; | |
54 | }; | |
55 | ||
56 | class StatusCommand : public PoolReplayerAdminSocketCommand { | |
57 | public: | |
58 | explicit StatusCommand(PoolReplayer *pool_replayer) | |
59 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
60 | } | |
61 | ||
62 | bool call(Formatter *f, stringstream *ss) override { | |
63 | pool_replayer->print_status(f, ss); | |
64 | return true; | |
65 | } | |
66 | }; | |
67 | ||
68 | class StartCommand : public PoolReplayerAdminSocketCommand { | |
69 | public: | |
70 | explicit StartCommand(PoolReplayer *pool_replayer) | |
71 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
72 | } | |
73 | ||
74 | bool call(Formatter *f, stringstream *ss) override { | |
75 | pool_replayer->start(); | |
76 | return true; | |
77 | } | |
78 | }; | |
79 | ||
80 | class StopCommand : public PoolReplayerAdminSocketCommand { | |
81 | public: | |
82 | explicit StopCommand(PoolReplayer *pool_replayer) | |
83 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
84 | } | |
85 | ||
86 | bool call(Formatter *f, stringstream *ss) override { | |
87 | pool_replayer->stop(true); | |
88 | return true; | |
89 | } | |
90 | }; | |
91 | ||
92 | class RestartCommand : public PoolReplayerAdminSocketCommand { | |
93 | public: | |
94 | explicit RestartCommand(PoolReplayer *pool_replayer) | |
95 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
96 | } | |
97 | ||
98 | bool call(Formatter *f, stringstream *ss) override { | |
99 | pool_replayer->restart(); | |
100 | return true; | |
101 | } | |
102 | }; | |
103 | ||
104 | class FlushCommand : public PoolReplayerAdminSocketCommand { | |
105 | public: | |
106 | explicit FlushCommand(PoolReplayer *pool_replayer) | |
107 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
108 | } | |
109 | ||
110 | bool call(Formatter *f, stringstream *ss) override { | |
111 | pool_replayer->flush(); | |
112 | return true; | |
113 | } | |
114 | }; | |
115 | ||
116 | class LeaderReleaseCommand : public PoolReplayerAdminSocketCommand { | |
117 | public: | |
118 | explicit LeaderReleaseCommand(PoolReplayer *pool_replayer) | |
119 | : PoolReplayerAdminSocketCommand(pool_replayer) { | |
120 | } | |
121 | ||
122 | bool call(Formatter *f, stringstream *ss) override { | |
123 | pool_replayer->release_leader(); | |
124 | return true; | |
125 | } | |
126 | }; | |
127 | ||
128 | class PoolReplayerAdminSocketHook : public AdminSocketHook { | |
129 | public: | |
130 | PoolReplayerAdminSocketHook(CephContext *cct, const std::string &name, | |
131 | PoolReplayer *pool_replayer) | |
132 | : admin_socket(cct->get_admin_socket()) { | |
133 | std::string command; | |
134 | int r; | |
135 | ||
136 | command = "rbd mirror status " + name; | |
137 | r = admin_socket->register_command(command, command, this, | |
138 | "get status for rbd mirror " + name); | |
139 | if (r == 0) { | |
140 | commands[command] = new StatusCommand(pool_replayer); | |
141 | } | |
142 | ||
143 | command = "rbd mirror start " + name; | |
144 | r = admin_socket->register_command(command, command, this, | |
145 | "start rbd mirror " + name); | |
146 | if (r == 0) { | |
147 | commands[command] = new StartCommand(pool_replayer); | |
148 | } | |
149 | ||
150 | command = "rbd mirror stop " + name; | |
151 | r = admin_socket->register_command(command, command, this, | |
152 | "stop rbd mirror " + name); | |
153 | if (r == 0) { | |
154 | commands[command] = new StopCommand(pool_replayer); | |
155 | } | |
156 | ||
157 | command = "rbd mirror restart " + name; | |
158 | r = admin_socket->register_command(command, command, this, | |
159 | "restart rbd mirror " + name); | |
160 | if (r == 0) { | |
161 | commands[command] = new RestartCommand(pool_replayer); | |
162 | } | |
163 | ||
164 | command = "rbd mirror flush " + name; | |
165 | r = admin_socket->register_command(command, command, this, | |
166 | "flush rbd mirror " + name); | |
167 | if (r == 0) { | |
168 | commands[command] = new FlushCommand(pool_replayer); | |
169 | } | |
170 | ||
171 | command = "rbd mirror leader release " + name; | |
172 | r = admin_socket->register_command(command, command, this, | |
173 | "release rbd mirror leader " + name); | |
174 | if (r == 0) { | |
175 | commands[command] = new LeaderReleaseCommand(pool_replayer); | |
176 | } | |
177 | } | |
178 | ||
179 | ~PoolReplayerAdminSocketHook() override { | |
180 | for (Commands::const_iterator i = commands.begin(); i != commands.end(); | |
181 | ++i) { | |
182 | (void)admin_socket->unregister_command(i->first); | |
183 | delete i->second; | |
184 | } | |
185 | } | |
186 | ||
187 | bool call(std::string command, cmdmap_t& cmdmap, std::string format, | |
188 | bufferlist& out) override { | |
189 | Commands::const_iterator i = commands.find(command); | |
190 | assert(i != commands.end()); | |
191 | Formatter *f = Formatter::create(format); | |
192 | stringstream ss; | |
193 | bool r = i->second->call(f, &ss); | |
194 | delete f; | |
195 | out.append(ss); | |
196 | return r; | |
197 | } | |
198 | ||
199 | private: | |
200 | typedef std::map<std::string, PoolReplayerAdminSocketCommand*> Commands; | |
201 | ||
202 | AdminSocket *admin_socket; | |
203 | Commands commands; | |
204 | }; | |
205 | ||
206 | } // anonymous namespace | |
207 | ||
208 | PoolReplayer::PoolReplayer(Threads<librbd::ImageCtx> *threads, | |
209 | std::shared_ptr<ImageDeleter> image_deleter, | |
210 | ImageSyncThrottlerRef<> image_sync_throttler, | |
211 | int64_t local_pool_id, const peer_t &peer, | |
212 | const std::vector<const char*> &args) : | |
213 | m_threads(threads), | |
214 | m_image_deleter(image_deleter), | |
215 | m_image_sync_throttler(image_sync_throttler), | |
216 | m_lock(stringify("rbd::mirror::PoolReplayer ") + stringify(peer)), | |
217 | m_peer(peer), | |
218 | m_args(args), | |
219 | m_local_pool_id(local_pool_id), | |
220 | m_local_pool_watcher_listener(this, true), | |
221 | m_remote_pool_watcher_listener(this, false), | |
222 | m_asok_hook(nullptr), | |
223 | m_pool_replayer_thread(this), | |
224 | m_leader_listener(this) | |
225 | { | |
226 | } | |
227 | ||
228 | PoolReplayer::~PoolReplayer() | |
229 | { | |
230 | delete m_asok_hook; | |
231 | ||
232 | m_stopping = true; | |
233 | { | |
234 | Mutex::Locker l(m_lock); | |
235 | m_cond.Signal(); | |
236 | } | |
237 | if (m_pool_replayer_thread.is_started()) { | |
238 | m_pool_replayer_thread.join(); | |
239 | } | |
240 | if (m_leader_watcher) { | |
241 | m_leader_watcher->shut_down(); | |
242 | } | |
243 | if (m_instance_watcher) { | |
244 | m_instance_watcher->shut_down(); | |
245 | } | |
246 | if (m_instance_replayer) { | |
247 | m_instance_replayer->shut_down(); | |
248 | } | |
249 | ||
250 | assert(!m_local_pool_watcher); | |
251 | assert(!m_remote_pool_watcher); | |
252 | } | |
253 | ||
254 | bool PoolReplayer::is_blacklisted() const { | |
255 | Mutex::Locker locker(m_lock); | |
256 | return m_blacklisted; | |
257 | } | |
258 | ||
259 | bool PoolReplayer::is_leader() const { | |
260 | Mutex::Locker locker(m_lock); | |
261 | return m_leader_watcher && m_leader_watcher->is_leader(); | |
262 | } | |
263 | ||
264 | int PoolReplayer::init() | |
265 | { | |
266 | dout(20) << "replaying for " << m_peer << dendl; | |
267 | ||
268 | int r = init_rados(g_ceph_context->_conf->cluster, | |
269 | g_ceph_context->_conf->name.to_str(), | |
270 | "local cluster", &m_local_rados); | |
271 | if (r < 0) { | |
272 | return r; | |
273 | } | |
274 | ||
275 | r = init_rados(m_peer.cluster_name, m_peer.client_name, | |
276 | std::string("remote peer ") + stringify(m_peer), | |
277 | &m_remote_rados); | |
278 | if (r < 0) { | |
279 | return r; | |
280 | } | |
281 | ||
282 | r = m_local_rados->ioctx_create2(m_local_pool_id, m_local_io_ctx); | |
283 | if (r < 0) { | |
284 | derr << "error accessing local pool " << m_local_pool_id << ": " | |
285 | << cpp_strerror(r) << dendl; | |
286 | return r; | |
287 | } | |
288 | ||
289 | std::string local_mirror_uuid; | |
290 | r = librbd::cls_client::mirror_uuid_get(&m_local_io_ctx, | |
291 | &local_mirror_uuid); | |
292 | if (r < 0) { | |
293 | derr << "failed to retrieve local mirror uuid from pool " | |
294 | << m_local_io_ctx.get_pool_name() << ": " << cpp_strerror(r) << dendl; | |
295 | return r; | |
296 | } | |
297 | ||
298 | r = m_remote_rados->ioctx_create(m_local_io_ctx.get_pool_name().c_str(), | |
299 | m_remote_io_ctx); | |
300 | if (r < 0) { | |
301 | derr << "error accessing remote pool " << m_local_io_ctx.get_pool_name() | |
302 | << ": " << cpp_strerror(r) << dendl; | |
303 | return r; | |
304 | } | |
305 | ||
306 | dout(20) << "connected to " << m_peer << dendl; | |
307 | ||
308 | m_instance_replayer.reset( | |
309 | InstanceReplayer<>::create(m_threads, m_image_deleter, | |
310 | m_image_sync_throttler, m_local_rados, | |
311 | local_mirror_uuid, m_local_pool_id)); | |
312 | m_instance_replayer->init(); | |
313 | m_instance_replayer->add_peer(m_peer.uuid, m_remote_io_ctx); | |
314 | ||
315 | m_instance_watcher.reset(InstanceWatcher<>::create(m_local_io_ctx, | |
316 | m_threads->work_queue, | |
317 | m_instance_replayer.get())); | |
318 | r = m_instance_watcher->init(); | |
319 | if (r < 0) { | |
320 | derr << "error initializing instance watcher: " << cpp_strerror(r) << dendl; | |
321 | return r; | |
322 | } | |
323 | ||
324 | m_leader_watcher.reset(new LeaderWatcher<>(m_threads, m_local_io_ctx, | |
325 | &m_leader_listener)); | |
326 | r = m_leader_watcher->init(); | |
327 | if (r < 0) { | |
328 | derr << "error initializing leader watcher: " << cpp_strerror(r) << dendl; | |
329 | return r; | |
330 | } | |
331 | ||
332 | m_pool_replayer_thread.create("pool replayer"); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | int PoolReplayer::init_rados(const std::string &cluster_name, | |
338 | const std::string &client_name, | |
339 | const std::string &description, | |
340 | RadosRef *rados_ref) { | |
341 | rados_ref->reset(new librados::Rados()); | |
342 | ||
343 | // NOTE: manually bootstrap a CephContext here instead of via | |
344 | // the librados API to avoid mixing global singletons between | |
345 | // the librados shared library and the daemon | |
346 | // TODO: eliminate intermingling of global singletons within Ceph APIs | |
347 | CephInitParameters iparams(CEPH_ENTITY_TYPE_CLIENT); | |
348 | if (client_name.empty() || !iparams.name.from_str(client_name)) { | |
349 | derr << "error initializing cluster handle for " << description << dendl; | |
350 | return -EINVAL; | |
351 | } | |
352 | ||
353 | CephContext *cct = common_preinit(iparams, CODE_ENVIRONMENT_LIBRARY, | |
354 | CINIT_FLAG_UNPRIVILEGED_DAEMON_DEFAULTS); | |
355 | cct->_conf->cluster = cluster_name; | |
356 | ||
357 | // librados::Rados::conf_read_file | |
358 | int r = cct->_conf->parse_config_files(nullptr, nullptr, 0); | |
359 | if (r < 0) { | |
360 | derr << "could not read ceph conf for " << description << ": " | |
361 | << cpp_strerror(r) << dendl; | |
362 | cct->put(); | |
363 | return r; | |
364 | } | |
365 | cct->_conf->parse_env(); | |
366 | ||
367 | // librados::Rados::conf_parse_env | |
368 | std::vector<const char*> args; | |
369 | env_to_vec(args, nullptr); | |
370 | r = cct->_conf->parse_argv(args); | |
371 | if (r < 0) { | |
372 | derr << "could not parse environment for " << description << ":" | |
373 | << cpp_strerror(r) << dendl; | |
374 | cct->put(); | |
375 | return r; | |
376 | } | |
377 | ||
378 | if (!m_args.empty()) { | |
379 | // librados::Rados::conf_parse_argv | |
380 | args = m_args; | |
381 | r = cct->_conf->parse_argv(args); | |
382 | if (r < 0) { | |
383 | derr << "could not parse command line args for " << description << ": " | |
384 | << cpp_strerror(r) << dendl; | |
385 | cct->put(); | |
386 | return r; | |
387 | } | |
388 | } | |
389 | ||
390 | if (!g_ceph_context->_conf->admin_socket.empty()) { | |
391 | cct->_conf->set_val_or_die("admin_socket", | |
392 | "$run_dir/$name.$pid.$cluster.$cctid.asok"); | |
393 | } | |
394 | ||
395 | // disable unnecessary librbd cache | |
396 | cct->_conf->set_val_or_die("rbd_cache", "false"); | |
397 | cct->_conf->apply_changes(nullptr); | |
398 | cct->_conf->complain_about_parse_errors(cct); | |
399 | ||
400 | r = (*rados_ref)->init_with_context(cct); | |
401 | assert(r == 0); | |
402 | cct->put(); | |
403 | ||
404 | r = (*rados_ref)->connect(); | |
405 | if (r < 0) { | |
406 | derr << "error connecting to " << description << ": " | |
407 | << cpp_strerror(r) << dendl; | |
408 | return r; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
414 | void PoolReplayer::run() | |
415 | { | |
416 | dout(20) << "enter" << dendl; | |
417 | ||
418 | while (!m_stopping) { | |
419 | std::string asok_hook_name = m_local_io_ctx.get_pool_name() + " " + | |
420 | m_peer.cluster_name; | |
421 | if (m_asok_hook_name != asok_hook_name || m_asok_hook == nullptr) { | |
422 | m_asok_hook_name = asok_hook_name; | |
423 | delete m_asok_hook; | |
424 | ||
425 | m_asok_hook = new PoolReplayerAdminSocketHook(g_ceph_context, | |
426 | m_asok_hook_name, this); | |
427 | } | |
428 | ||
429 | Mutex::Locker locker(m_lock); | |
430 | if ((m_local_pool_watcher && m_local_pool_watcher->is_blacklisted()) || | |
431 | (m_remote_pool_watcher && m_remote_pool_watcher->is_blacklisted())) { | |
432 | m_blacklisted = true; | |
433 | m_stopping = true; | |
434 | break; | |
435 | } | |
436 | ||
437 | m_cond.WaitInterval(m_lock, utime_t(1, 0)); | |
438 | } | |
439 | } | |
440 | ||
441 | void PoolReplayer::print_status(Formatter *f, stringstream *ss) | |
442 | { | |
443 | dout(20) << "enter" << dendl; | |
444 | ||
445 | if (!f) { | |
446 | return; | |
447 | } | |
448 | ||
449 | Mutex::Locker l(m_lock); | |
450 | ||
451 | f->open_object_section("pool_replayer_status"); | |
452 | f->dump_string("pool", m_local_io_ctx.get_pool_name()); | |
453 | f->dump_stream("peer") << m_peer; | |
454 | f->dump_string("instance_id", m_instance_watcher->get_instance_id()); | |
455 | ||
456 | std::string leader_instance_id; | |
457 | m_leader_watcher->get_leader_instance_id(&leader_instance_id); | |
458 | f->dump_string("leader_instance_id", leader_instance_id); | |
459 | ||
460 | bool leader = m_leader_watcher->is_leader(); | |
461 | f->dump_bool("leader", leader); | |
462 | if (leader) { | |
463 | std::vector<std::string> instance_ids; | |
464 | m_leader_watcher->list_instances(&instance_ids); | |
465 | f->open_array_section("instances"); | |
466 | for (auto instance_id : instance_ids) { | |
467 | f->dump_string("instance_id", instance_id); | |
468 | } | |
469 | f->close_section(); | |
470 | } | |
471 | ||
472 | f->dump_string("local_cluster_admin_socket", | |
473 | reinterpret_cast<CephContext *>(m_local_io_ctx.cct())->_conf-> | |
474 | admin_socket); | |
475 | f->dump_string("remote_cluster_admin_socket", | |
476 | reinterpret_cast<CephContext *>(m_remote_io_ctx.cct())->_conf-> | |
477 | admin_socket); | |
478 | ||
479 | m_instance_replayer->print_status(f, ss); | |
480 | ||
481 | f->close_section(); | |
482 | f->flush(*ss); | |
483 | } | |
484 | ||
485 | void PoolReplayer::start() | |
486 | { | |
487 | dout(20) << "enter" << dendl; | |
488 | ||
489 | Mutex::Locker l(m_lock); | |
490 | ||
491 | if (m_stopping) { | |
492 | return; | |
493 | } | |
494 | ||
495 | m_instance_replayer->start(); | |
496 | } | |
497 | ||
498 | void PoolReplayer::stop(bool manual) | |
499 | { | |
500 | dout(20) << "enter: manual=" << manual << dendl; | |
501 | ||
502 | Mutex::Locker l(m_lock); | |
503 | if (!manual) { | |
504 | m_stopping = true; | |
505 | m_cond.Signal(); | |
506 | return; | |
507 | } else if (m_stopping) { | |
508 | return; | |
509 | } | |
510 | ||
511 | m_instance_replayer->stop(); | |
512 | } | |
513 | ||
514 | void PoolReplayer::restart() | |
515 | { | |
516 | dout(20) << "enter" << dendl; | |
517 | ||
518 | Mutex::Locker l(m_lock); | |
519 | ||
520 | if (m_stopping) { | |
521 | return; | |
522 | } | |
523 | ||
524 | m_instance_replayer->restart(); | |
525 | } | |
526 | ||
527 | void PoolReplayer::flush() | |
528 | { | |
529 | dout(20) << "enter" << dendl; | |
530 | ||
531 | Mutex::Locker l(m_lock); | |
532 | ||
533 | if (m_stopping || m_manual_stop) { | |
534 | return; | |
535 | } | |
536 | ||
537 | m_instance_replayer->flush(); | |
538 | } | |
539 | ||
540 | void PoolReplayer::release_leader() | |
541 | { | |
542 | dout(20) << "enter" << dendl; | |
543 | ||
544 | Mutex::Locker l(m_lock); | |
545 | ||
546 | if (m_stopping || !m_leader_watcher) { | |
547 | return; | |
548 | } | |
549 | ||
550 | m_leader_watcher->release_leader(); | |
551 | } | |
552 | ||
553 | void PoolReplayer::handle_update(const std::string &mirror_uuid, | |
554 | ImageIds &&added_image_ids, | |
555 | ImageIds &&removed_image_ids) { | |
556 | if (m_stopping) { | |
557 | return; | |
558 | } | |
559 | ||
560 | dout(10) << "mirror_uuid=" << mirror_uuid << ", " | |
561 | << "added_count=" << added_image_ids.size() << ", " | |
562 | << "removed_count=" << removed_image_ids.size() << dendl; | |
563 | Mutex::Locker locker(m_lock); | |
564 | if (!m_leader_watcher->is_leader()) { | |
565 | return; | |
566 | } | |
567 | ||
568 | if (m_initial_mirror_image_ids.find(mirror_uuid) == | |
569 | m_initial_mirror_image_ids.end() && | |
570 | m_initial_mirror_image_ids.size() < 2) { | |
571 | m_initial_mirror_image_ids[mirror_uuid] = added_image_ids; | |
572 | ||
573 | if (m_initial_mirror_image_ids.size() == 2) { | |
574 | dout(10) << "local and remote pools refreshed" << dendl; | |
575 | ||
576 | // both local and remote initial pool listing received. derive | |
577 | // removal notifications for the remote pool | |
578 | auto &local_image_ids = m_initial_mirror_image_ids.begin()->second; | |
579 | auto &remote_image_ids = m_initial_mirror_image_ids.rbegin()->second; | |
580 | for (auto &local_image_id : local_image_ids) { | |
581 | if (remote_image_ids.find(local_image_id) == remote_image_ids.end()) { | |
582 | removed_image_ids.emplace(local_image_id.global_id, ""); | |
583 | } | |
584 | } | |
585 | local_image_ids.clear(); | |
586 | remote_image_ids.clear(); | |
587 | } | |
588 | } | |
589 | ||
590 | if (!mirror_uuid.empty() && m_peer.uuid != mirror_uuid) { | |
591 | m_instance_replayer->remove_peer(m_peer.uuid); | |
592 | m_instance_replayer->add_peer(mirror_uuid, m_remote_io_ctx); | |
593 | m_peer.uuid = mirror_uuid; | |
594 | } | |
595 | ||
596 | m_update_op_tracker.start_op(); | |
597 | Context *ctx = new FunctionContext([this](int r) { | |
598 | dout(20) << "complete handle_update: r=" << r << dendl; | |
599 | m_update_op_tracker.finish_op(); | |
600 | }); | |
601 | ||
602 | C_Gather *gather_ctx = new C_Gather(g_ceph_context, ctx); | |
603 | ||
604 | for (auto &image_id : added_image_ids) { | |
605 | // for now always send to myself (the leader) | |
606 | std::string &instance_id = m_instance_watcher->get_instance_id(); | |
607 | m_instance_watcher->notify_image_acquire(instance_id, image_id.global_id, | |
608 | mirror_uuid, image_id.id, | |
609 | gather_ctx->new_sub()); | |
610 | } | |
611 | ||
612 | for (auto &image_id : removed_image_ids) { | |
613 | // for now always send to myself (the leader) | |
614 | std::string &instance_id = m_instance_watcher->get_instance_id(); | |
615 | m_instance_watcher->notify_image_release(instance_id, image_id.global_id, | |
616 | mirror_uuid, image_id.id, true, | |
617 | gather_ctx->new_sub()); | |
618 | } | |
619 | ||
620 | gather_ctx->activate(); | |
621 | } | |
622 | ||
623 | void PoolReplayer::handle_post_acquire_leader(Context *on_finish) { | |
624 | dout(20) << dendl; | |
625 | init_local_pool_watcher(on_finish); | |
626 | } | |
627 | ||
628 | void PoolReplayer::handle_pre_release_leader(Context *on_finish) { | |
629 | dout(20) << dendl; | |
630 | shut_down_pool_watchers(on_finish); | |
631 | } | |
632 | ||
633 | void PoolReplayer::init_local_pool_watcher(Context *on_finish) { | |
634 | dout(20) << dendl; | |
635 | ||
636 | Mutex::Locker locker(m_lock); | |
637 | assert(!m_local_pool_watcher); | |
638 | m_local_pool_watcher.reset(new PoolWatcher<>( | |
639 | m_threads, m_local_io_ctx, m_local_pool_watcher_listener)); | |
640 | m_initial_mirror_image_ids.clear(); | |
641 | ||
642 | // ensure the initial set of local images is up-to-date | |
643 | // after acquiring the leader role | |
644 | auto ctx = new FunctionContext([this, on_finish](int r) { | |
645 | handle_init_local_pool_watcher(r, on_finish); | |
646 | }); | |
647 | m_local_pool_watcher->init(create_async_context_callback( | |
648 | m_threads->work_queue, ctx)); | |
649 | } | |
650 | ||
651 | void PoolReplayer::handle_init_local_pool_watcher(int r, Context *on_finish) { | |
652 | dout(20) << "r=" << r << dendl; | |
653 | if (r < 0) { | |
654 | derr << "failed to retrieve local images: " << cpp_strerror(r) << dendl; | |
655 | on_finish->complete(r); | |
656 | return; | |
657 | } | |
658 | ||
659 | init_remote_pool_watcher(on_finish); | |
660 | } | |
661 | ||
662 | void PoolReplayer::init_remote_pool_watcher(Context *on_finish) { | |
663 | dout(20) << dendl; | |
664 | ||
665 | Mutex::Locker locker(m_lock); | |
666 | assert(!m_remote_pool_watcher); | |
667 | m_remote_pool_watcher.reset(new PoolWatcher<>( | |
668 | m_threads, m_remote_io_ctx, m_remote_pool_watcher_listener)); | |
669 | m_remote_pool_watcher->init(create_async_context_callback( | |
670 | m_threads->work_queue, on_finish)); | |
671 | ||
672 | m_cond.Signal(); | |
673 | } | |
674 | ||
675 | void PoolReplayer::shut_down_pool_watchers(Context *on_finish) { | |
676 | dout(20) << dendl; | |
677 | ||
678 | { | |
679 | Mutex::Locker locker(m_lock); | |
680 | if (m_local_pool_watcher) { | |
681 | Context *ctx = new FunctionContext([this, on_finish](int r) { | |
682 | handle_shut_down_pool_watchers(r, on_finish); | |
683 | }); | |
684 | ctx = create_async_context_callback(m_threads->work_queue, ctx); | |
685 | ||
686 | auto gather_ctx = new C_Gather(g_ceph_context, ctx); | |
687 | m_local_pool_watcher->shut_down(gather_ctx->new_sub()); | |
688 | if (m_remote_pool_watcher) { | |
689 | m_remote_pool_watcher->shut_down(gather_ctx->new_sub()); | |
690 | } | |
691 | gather_ctx->activate(); | |
692 | return; | |
693 | } | |
694 | } | |
695 | ||
696 | on_finish->complete(0); | |
697 | } | |
698 | ||
699 | void PoolReplayer::handle_shut_down_pool_watchers(int r, Context *on_finish) { | |
700 | dout(20) << "r=" << r << dendl; | |
701 | ||
702 | { | |
703 | Mutex::Locker locker(m_lock); | |
704 | assert(m_local_pool_watcher); | |
705 | m_local_pool_watcher.reset(); | |
706 | ||
707 | if (m_remote_pool_watcher) { | |
708 | m_remote_pool_watcher.reset(); | |
709 | } | |
710 | } | |
711 | wait_for_update_ops(on_finish); | |
712 | } | |
713 | ||
714 | void PoolReplayer::wait_for_update_ops(Context *on_finish) { | |
715 | dout(20) << dendl; | |
716 | ||
717 | Mutex::Locker locker(m_lock); | |
718 | ||
719 | Context *ctx = new FunctionContext([this, on_finish](int r) { | |
720 | handle_wait_for_update_ops(r, on_finish); | |
721 | }); | |
722 | ctx = create_async_context_callback(m_threads->work_queue, ctx); | |
723 | ||
724 | m_update_op_tracker.wait_for_ops(ctx); | |
725 | } | |
726 | ||
727 | void PoolReplayer::handle_wait_for_update_ops(int r, Context *on_finish) { | |
728 | dout(20) << "r=" << r << dendl; | |
729 | ||
730 | assert(r == 0); | |
731 | ||
732 | Mutex::Locker locker(m_lock); | |
733 | m_instance_replayer->release_all(on_finish); | |
734 | } | |
735 | ||
736 | } // namespace mirror | |
737 | } // namespace rbd |