]>
Commit | Line | Data |
---|---|---|
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 "include/compat.h" | |
5 | #include "BootstrapRequest.h" | |
6 | #include "CloseImageRequest.h" | |
7 | #include "CreateImageRequest.h" | |
8 | #include "IsPrimaryRequest.h" | |
9 | #include "OpenImageRequest.h" | |
10 | #include "OpenLocalImageRequest.h" | |
11 | #include "common/debug.h" | |
12 | #include "common/dout.h" | |
13 | #include "common/errno.h" | |
14 | #include "common/WorkQueue.h" | |
15 | #include "cls/rbd/cls_rbd_client.h" | |
16 | #include "journal/Journaler.h" | |
17 | #include "librbd/ImageCtx.h" | |
18 | #include "librbd/ImageState.h" | |
19 | #include "librbd/internal.h" | |
20 | #include "librbd/Journal.h" | |
21 | #include "librbd/Utils.h" | |
22 | #include "librbd/journal/Types.h" | |
23 | #include "tools/rbd_mirror/ProgressContext.h" | |
31f18b77 | 24 | #include "tools/rbd_mirror/ImageSync.h" |
7c673cae FG |
25 | |
26 | #define dout_context g_ceph_context | |
27 | #define dout_subsys ceph_subsys_rbd_mirror | |
28 | #undef dout_prefix | |
29 | #define dout_prefix *_dout << "rbd::mirror::image_replayer::BootstrapRequest: " \ | |
30 | << this << " " << __func__ | |
31 | ||
32 | namespace rbd { | |
33 | namespace mirror { | |
34 | namespace image_replayer { | |
35 | ||
36 | using librbd::util::create_context_callback; | |
37 | using librbd::util::create_rados_callback; | |
38 | using librbd::util::unique_lock_name; | |
39 | ||
40 | template <typename I> | |
41 | BootstrapRequest<I>::BootstrapRequest( | |
42 | librados::IoCtx &local_io_ctx, | |
43 | librados::IoCtx &remote_io_ctx, | |
31f18b77 | 44 | InstanceWatcher<I> *instance_watcher, |
7c673cae FG |
45 | I **local_image_ctx, |
46 | const std::string &local_image_id, | |
47 | const std::string &remote_image_id, | |
48 | const std::string &global_image_id, | |
49 | ContextWQ *work_queue, SafeTimer *timer, | |
50 | Mutex *timer_lock, | |
51 | const std::string &local_mirror_uuid, | |
52 | const std::string &remote_mirror_uuid, | |
53 | Journaler *journaler, | |
54 | MirrorPeerClientMeta *client_meta, | |
55 | Context *on_finish, | |
56 | bool *do_resync, | |
57 | rbd::mirror::ProgressContext *progress_ctx) | |
58 | : BaseRequest("rbd::mirror::image_replayer::BootstrapRequest", | |
59 | reinterpret_cast<CephContext*>(local_io_ctx.cct()), on_finish), | |
60 | m_local_io_ctx(local_io_ctx), m_remote_io_ctx(remote_io_ctx), | |
31f18b77 FG |
61 | m_instance_watcher(instance_watcher), m_local_image_ctx(local_image_ctx), |
62 | m_local_image_id(local_image_id), m_remote_image_id(remote_image_id), | |
63 | m_global_image_id(global_image_id), m_work_queue(work_queue), | |
64 | m_timer(timer), m_timer_lock(timer_lock), | |
7c673cae FG |
65 | m_local_mirror_uuid(local_mirror_uuid), |
66 | m_remote_mirror_uuid(remote_mirror_uuid), m_journaler(journaler), | |
67 | m_client_meta(client_meta), m_progress_ctx(progress_ctx), | |
68 | m_do_resync(do_resync), | |
69 | m_lock(unique_lock_name("BootstrapRequest::m_lock", this)) { | |
70 | } | |
71 | ||
72 | template <typename I> | |
73 | BootstrapRequest<I>::~BootstrapRequest() { | |
74 | assert(m_remote_image_ctx == nullptr); | |
75 | } | |
76 | ||
c07f9fc5 FG |
77 | template <typename I> |
78 | bool BootstrapRequest<I>::is_syncing() const { | |
79 | Mutex::Locker locker(m_lock); | |
80 | return (m_image_sync != nullptr); | |
81 | } | |
82 | ||
7c673cae FG |
83 | template <typename I> |
84 | void BootstrapRequest<I>::send() { | |
85 | *m_do_resync = false; | |
86 | ||
87 | get_remote_tag_class(); | |
88 | } | |
89 | ||
90 | template <typename I> | |
91 | void BootstrapRequest<I>::cancel() { | |
92 | dout(20) << dendl; | |
93 | ||
94 | Mutex::Locker locker(m_lock); | |
95 | m_canceled = true; | |
96 | ||
31f18b77 FG |
97 | if (m_image_sync != nullptr) { |
98 | m_image_sync->cancel(); | |
99 | } | |
7c673cae FG |
100 | } |
101 | ||
102 | template <typename I> | |
103 | void BootstrapRequest<I>::get_remote_tag_class() { | |
104 | dout(20) << dendl; | |
105 | ||
106 | update_progress("GET_REMOTE_TAG_CLASS"); | |
107 | ||
108 | Context *ctx = create_context_callback< | |
109 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_get_remote_tag_class>( | |
110 | this); | |
111 | m_journaler->get_client(librbd::Journal<>::IMAGE_CLIENT_ID, &m_client, ctx); | |
112 | } | |
113 | ||
114 | template <typename I> | |
115 | void BootstrapRequest<I>::handle_get_remote_tag_class(int r) { | |
116 | dout(20) << ": r=" << r << dendl; | |
117 | ||
118 | if (r < 0) { | |
119 | derr << ": failed to retrieve remote client: " << cpp_strerror(r) << dendl; | |
120 | finish(r); | |
121 | return; | |
122 | } | |
123 | ||
124 | librbd::journal::ClientData client_data; | |
125 | bufferlist::iterator it = m_client.data.begin(); | |
126 | try { | |
127 | ::decode(client_data, it); | |
128 | } catch (const buffer::error &err) { | |
129 | derr << ": failed to decode remote client meta data: " << err.what() | |
130 | << dendl; | |
131 | finish(-EBADMSG); | |
132 | return; | |
133 | } | |
134 | ||
135 | librbd::journal::ImageClientMeta *client_meta = | |
136 | boost::get<librbd::journal::ImageClientMeta>(&client_data.client_meta); | |
137 | if (client_meta == nullptr) { | |
138 | derr << ": unknown remote client registration" << dendl; | |
139 | finish(-EINVAL); | |
140 | return; | |
141 | } | |
142 | ||
143 | m_remote_tag_class = client_meta->tag_class; | |
144 | dout(10) << ": remote tag class=" << m_remote_tag_class << dendl; | |
145 | ||
d2e6a577 FG |
146 | open_remote_image(); |
147 | } | |
148 | ||
149 | template <typename I> | |
150 | void BootstrapRequest<I>::open_remote_image() { | |
151 | dout(20) << dendl; | |
152 | ||
153 | update_progress("OPEN_REMOTE_IMAGE"); | |
154 | ||
155 | Context *ctx = create_context_callback< | |
156 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_open_remote_image>( | |
157 | this); | |
158 | OpenImageRequest<I> *request = OpenImageRequest<I>::create( | |
159 | m_remote_io_ctx, &m_remote_image_ctx, m_remote_image_id, false, | |
160 | ctx); | |
161 | request->send(); | |
162 | } | |
163 | ||
164 | template <typename I> | |
165 | void BootstrapRequest<I>::handle_open_remote_image(int r) { | |
166 | dout(20) << ": r=" << r << dendl; | |
167 | ||
168 | if (r < 0) { | |
169 | derr << ": failed to open remote image: " << cpp_strerror(r) << dendl; | |
170 | assert(m_remote_image_ctx == nullptr); | |
171 | finish(r); | |
172 | return; | |
173 | } | |
174 | ||
7c673cae FG |
175 | get_client(); |
176 | } | |
177 | ||
178 | template <typename I> | |
179 | void BootstrapRequest<I>::get_client() { | |
180 | dout(20) << dendl; | |
181 | ||
182 | update_progress("GET_CLIENT"); | |
183 | ||
184 | Context *ctx = create_context_callback< | |
185 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_get_client>( | |
186 | this); | |
187 | m_journaler->get_client(m_local_mirror_uuid, &m_client, ctx); | |
188 | } | |
189 | ||
190 | template <typename I> | |
191 | void BootstrapRequest<I>::handle_get_client(int r) { | |
192 | dout(20) << ": r=" << r << dendl; | |
193 | ||
194 | if (r == -ENOENT) { | |
195 | dout(10) << ": client not registered" << dendl; | |
196 | } else if (r < 0) { | |
197 | derr << ": failed to retrieve client: " << cpp_strerror(r) << dendl; | |
d2e6a577 FG |
198 | m_ret_val = r; |
199 | close_remote_image(); | |
7c673cae FG |
200 | return; |
201 | } else if (decode_client_meta()) { | |
202 | // skip registration if it already exists | |
d2e6a577 | 203 | is_primary(); |
7c673cae FG |
204 | return; |
205 | } | |
206 | ||
207 | register_client(); | |
208 | } | |
209 | ||
210 | template <typename I> | |
211 | void BootstrapRequest<I>::register_client() { | |
212 | dout(20) << dendl; | |
213 | ||
214 | update_progress("REGISTER_CLIENT"); | |
215 | ||
216 | // record an place-holder record | |
217 | librbd::journal::ClientData client_data{ | |
218 | librbd::journal::MirrorPeerClientMeta{m_local_image_id}}; | |
219 | bufferlist client_data_bl; | |
220 | ::encode(client_data, client_data_bl); | |
221 | ||
222 | Context *ctx = create_context_callback< | |
223 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_register_client>( | |
224 | this); | |
225 | m_journaler->register_client(client_data_bl, ctx); | |
226 | } | |
227 | ||
228 | template <typename I> | |
229 | void BootstrapRequest<I>::handle_register_client(int r) { | |
230 | dout(20) << ": r=" << r << dendl; | |
231 | ||
232 | if (r < 0) { | |
233 | derr << ": failed to register with remote journal: " << cpp_strerror(r) | |
234 | << dendl; | |
d2e6a577 FG |
235 | m_ret_val = r; |
236 | close_remote_image(); | |
7c673cae FG |
237 | return; |
238 | } | |
239 | ||
d2e6a577 | 240 | m_client = {}; |
7c673cae | 241 | *m_client_meta = librbd::journal::MirrorPeerClientMeta(m_local_image_id); |
7c673cae FG |
242 | is_primary(); |
243 | } | |
244 | ||
245 | template <typename I> | |
246 | void BootstrapRequest<I>::is_primary() { | |
247 | dout(20) << dendl; | |
248 | ||
249 | update_progress("OPEN_REMOTE_IMAGE"); | |
250 | ||
251 | Context *ctx = create_context_callback< | |
252 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_is_primary>( | |
253 | this); | |
254 | IsPrimaryRequest<I> *request = IsPrimaryRequest<I>::create(m_remote_image_ctx, | |
255 | &m_primary, ctx); | |
256 | request->send(); | |
257 | } | |
258 | ||
259 | template <typename I> | |
260 | void BootstrapRequest<I>::handle_is_primary(int r) { | |
261 | dout(20) << ": r=" << r << dendl; | |
262 | ||
263 | if (r < 0) { | |
264 | derr << ": error querying remote image primary status: " << cpp_strerror(r) | |
265 | << dendl; | |
266 | m_ret_val = r; | |
267 | close_remote_image(); | |
268 | return; | |
269 | } | |
270 | ||
271 | if (!m_primary) { | |
272 | dout(5) << ": remote image is not primary -- skipping image replay" | |
273 | << dendl; | |
274 | m_ret_val = -EREMOTEIO; | |
275 | update_client_state(); | |
276 | return; | |
277 | } | |
278 | ||
279 | if (m_local_image_id.empty()) { | |
d2e6a577 | 280 | update_client_image(); |
7c673cae FG |
281 | return; |
282 | } | |
283 | ||
284 | open_local_image(); | |
285 | } | |
286 | ||
287 | template <typename I> | |
288 | void BootstrapRequest<I>::update_client_state() { | |
289 | if (m_client_meta->state == librbd::journal::MIRROR_PEER_STATE_REPLAYING) { | |
290 | // state already set for replaying upon failover | |
291 | close_remote_image(); | |
292 | return; | |
293 | } | |
294 | ||
295 | dout(20) << dendl; | |
296 | update_progress("UPDATE_CLIENT_STATE"); | |
297 | ||
298 | librbd::journal::MirrorPeerClientMeta client_meta(*m_client_meta); | |
299 | client_meta.state = librbd::journal::MIRROR_PEER_STATE_REPLAYING; | |
300 | ||
301 | librbd::journal::ClientData client_data(client_meta); | |
302 | bufferlist data_bl; | |
303 | ::encode(client_data, data_bl); | |
304 | ||
305 | Context *ctx = create_context_callback< | |
306 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_update_client_state>( | |
307 | this); | |
308 | m_journaler->update_client(data_bl, ctx); | |
309 | } | |
310 | ||
311 | template <typename I> | |
312 | void BootstrapRequest<I>::handle_update_client_state(int r) { | |
313 | dout(20) << ": r=" << r << dendl; | |
314 | if (r < 0) { | |
315 | derr << ": failed to update client: " << cpp_strerror(r) << dendl; | |
316 | } else { | |
d2e6a577 | 317 | m_client_meta->state = librbd::journal::MIRROR_PEER_STATE_REPLAYING; |
7c673cae FG |
318 | } |
319 | ||
320 | close_remote_image(); | |
321 | } | |
322 | ||
323 | template <typename I> | |
324 | void BootstrapRequest<I>::open_local_image() { | |
325 | dout(20) << dendl; | |
326 | ||
327 | update_progress("OPEN_LOCAL_IMAGE"); | |
328 | ||
329 | Context *ctx = create_context_callback< | |
330 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_open_local_image>( | |
331 | this); | |
332 | OpenLocalImageRequest<I> *request = OpenLocalImageRequest<I>::create( | |
333 | m_local_io_ctx, m_local_image_ctx, m_local_image_id, m_work_queue, | |
334 | ctx); | |
335 | request->send(); | |
336 | } | |
337 | ||
338 | template <typename I> | |
339 | void BootstrapRequest<I>::handle_open_local_image(int r) { | |
340 | dout(20) << ": r=" << r << dendl; | |
341 | ||
342 | if (r == -ENOENT) { | |
343 | assert(*m_local_image_ctx == nullptr); | |
344 | dout(10) << ": local image missing" << dendl; | |
d2e6a577 | 345 | unregister_client(); |
7c673cae FG |
346 | return; |
347 | } else if (r == -EREMOTEIO) { | |
348 | assert(*m_local_image_ctx == nullptr); | |
349 | dout(10) << "local image is primary -- skipping image replay" << dendl; | |
350 | m_ret_val = r; | |
351 | close_remote_image(); | |
352 | return; | |
353 | } else if (r < 0) { | |
354 | assert(*m_local_image_ctx == nullptr); | |
355 | derr << ": failed to open local image: " << cpp_strerror(r) << dendl; | |
356 | m_ret_val = r; | |
357 | close_remote_image(); | |
358 | return; | |
359 | } | |
360 | ||
361 | I *local_image_ctx = (*m_local_image_ctx); | |
362 | { | |
363 | RWLock::RLocker snap_locker(local_image_ctx->snap_lock); | |
364 | if (local_image_ctx->journal == nullptr) { | |
365 | derr << ": local image does not support journaling" << dendl; | |
366 | m_ret_val = -EINVAL; | |
367 | close_local_image(); | |
368 | return; | |
369 | } | |
370 | ||
371 | r = (*m_local_image_ctx)->journal->is_resync_requested(m_do_resync); | |
372 | if (r < 0) { | |
373 | derr << ": failed to check if a resync was requested" << dendl; | |
374 | m_ret_val = r; | |
375 | close_local_image(); | |
376 | return; | |
377 | } | |
378 | } | |
379 | ||
380 | if (*m_do_resync) { | |
381 | close_remote_image(); | |
382 | return; | |
383 | } | |
384 | ||
385 | if (m_client.state == cls::journal::CLIENT_STATE_DISCONNECTED) { | |
386 | dout(10) << ": client flagged disconnected -- skipping bootstrap" << dendl; | |
387 | // The caller is expected to detect disconnect initializing remote journal. | |
388 | m_ret_val = 0; | |
389 | close_remote_image(); | |
390 | return; | |
391 | } | |
392 | ||
d2e6a577 | 393 | get_remote_tags(); |
7c673cae FG |
394 | } |
395 | ||
396 | template <typename I> | |
d2e6a577 | 397 | void BootstrapRequest<I>::unregister_client() { |
7c673cae | 398 | dout(20) << dendl; |
d2e6a577 | 399 | update_progress("UNREGISTER_CLIENT"); |
7c673cae FG |
400 | |
401 | m_local_image_id = ""; | |
7c673cae | 402 | Context *ctx = create_context_callback< |
d2e6a577 | 403 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_unregister_client>( |
7c673cae | 404 | this); |
d2e6a577 | 405 | m_journaler->unregister_client(ctx); |
7c673cae FG |
406 | } |
407 | ||
408 | template <typename I> | |
d2e6a577 | 409 | void BootstrapRequest<I>::handle_unregister_client(int r) { |
7c673cae | 410 | dout(20) << ": r=" << r << dendl; |
7c673cae | 411 | if (r < 0) { |
d2e6a577 FG |
412 | derr << ": failed to unregister with remote journal: " << cpp_strerror(r) |
413 | << dendl; | |
7c673cae FG |
414 | m_ret_val = r; |
415 | close_remote_image(); | |
416 | return; | |
417 | } | |
418 | ||
d2e6a577 FG |
419 | *m_client_meta = librbd::journal::MirrorPeerClientMeta(""); |
420 | register_client(); | |
7c673cae FG |
421 | } |
422 | ||
423 | template <typename I> | |
424 | void BootstrapRequest<I>::update_client_image() { | |
425 | dout(20) << dendl; | |
7c673cae FG |
426 | update_progress("UPDATE_CLIENT_IMAGE"); |
427 | ||
d2e6a577 FG |
428 | assert(m_local_image_id.empty()); |
429 | m_local_image_id = librbd::util::generate_image_id<I>(m_local_io_ctx); | |
7c673cae FG |
430 | |
431 | librbd::journal::MirrorPeerClientMeta client_meta{m_local_image_id}; | |
432 | client_meta.state = librbd::journal::MIRROR_PEER_STATE_SYNCING; | |
433 | ||
434 | librbd::journal::ClientData client_data(client_meta); | |
435 | bufferlist data_bl; | |
436 | ::encode(client_data, data_bl); | |
437 | ||
438 | Context *ctx = create_context_callback< | |
439 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_update_client_image>( | |
440 | this); | |
441 | m_journaler->update_client(data_bl, ctx); | |
442 | } | |
443 | ||
444 | template <typename I> | |
445 | void BootstrapRequest<I>::handle_update_client_image(int r) { | |
446 | dout(20) << ": r=" << r << dendl; | |
447 | ||
448 | if (r < 0) { | |
449 | derr << ": failed to update client: " << cpp_strerror(r) << dendl; | |
450 | m_ret_val = r; | |
d2e6a577 | 451 | close_remote_image(); |
7c673cae FG |
452 | return; |
453 | } | |
454 | ||
455 | if (m_canceled) { | |
456 | dout(10) << ": request canceled" << dendl; | |
457 | m_ret_val = -ECANCELED; | |
d2e6a577 | 458 | close_remote_image(); |
7c673cae FG |
459 | return; |
460 | } | |
461 | ||
462 | *m_client_meta = {m_local_image_id}; | |
463 | m_client_meta->state = librbd::journal::MIRROR_PEER_STATE_SYNCING; | |
d2e6a577 FG |
464 | create_local_image(); |
465 | } | |
466 | ||
467 | template <typename I> | |
468 | void BootstrapRequest<I>::create_local_image() { | |
469 | dout(20) << dendl; | |
470 | update_progress("CREATE_LOCAL_IMAGE"); | |
471 | ||
472 | m_remote_image_ctx->snap_lock.get_read(); | |
473 | std::string image_name = m_remote_image_ctx->name; | |
474 | m_remote_image_ctx->snap_lock.put_read(); | |
475 | ||
476 | Context *ctx = create_context_callback< | |
477 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_create_local_image>( | |
478 | this); | |
479 | CreateImageRequest<I> *request = CreateImageRequest<I>::create( | |
480 | m_local_io_ctx, m_work_queue, m_global_image_id, m_remote_mirror_uuid, | |
481 | image_name, m_local_image_id, m_remote_image_ctx, ctx); | |
482 | request->send(); | |
483 | } | |
484 | ||
485 | template <typename I> | |
486 | void BootstrapRequest<I>::handle_create_local_image(int r) { | |
487 | dout(20) << ": r=" << r << dendl; | |
488 | ||
489 | if (r < 0) { | |
490 | derr << ": failed to create local image: " << cpp_strerror(r) << dendl; | |
491 | m_ret_val = r; | |
492 | close_remote_image(); | |
493 | return; | |
494 | } | |
495 | ||
496 | open_local_image(); | |
7c673cae FG |
497 | } |
498 | ||
499 | template <typename I> | |
500 | void BootstrapRequest<I>::get_remote_tags() { | |
501 | dout(20) << dendl; | |
502 | ||
503 | update_progress("GET_REMOTE_TAGS"); | |
504 | ||
505 | if (m_client_meta->state == librbd::journal::MIRROR_PEER_STATE_SYNCING) { | |
506 | // optimization -- no need to compare remote tags if we just created | |
507 | // the image locally or sync was interrupted | |
508 | image_sync(); | |
509 | return; | |
510 | } | |
511 | ||
512 | dout(20) << dendl; | |
513 | ||
514 | Context *ctx = create_context_callback< | |
515 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_get_remote_tags>(this); | |
516 | m_journaler->get_tags(m_remote_tag_class, &m_remote_tags, ctx); | |
517 | } | |
518 | ||
519 | template <typename I> | |
520 | void BootstrapRequest<I>::handle_get_remote_tags(int r) { | |
521 | dout(20) << ": r=" << r << dendl; | |
522 | ||
523 | if (r < 0) { | |
524 | derr << ": failed to retrieve remote tags: " << cpp_strerror(r) << dendl; | |
525 | m_ret_val = r; | |
526 | close_local_image(); | |
527 | return; | |
528 | } | |
529 | ||
530 | if (m_canceled) { | |
531 | dout(10) << ": request canceled" << dendl; | |
532 | m_ret_val = -ECANCELED; | |
533 | close_local_image(); | |
534 | return; | |
535 | } | |
536 | ||
537 | // At this point, the local image was existing, non-primary, and replaying; | |
538 | // and the remote image is primary. Attempt to link the local image's most | |
539 | // recent tag to the remote image's tag chain. | |
540 | uint64_t local_tag_tid; | |
541 | librbd::journal::TagData local_tag_data; | |
542 | I *local_image_ctx = (*m_local_image_ctx); | |
543 | { | |
544 | RWLock::RLocker snap_locker(local_image_ctx->snap_lock); | |
545 | if (local_image_ctx->journal == nullptr) { | |
546 | derr << ": local image does not support journaling" << dendl; | |
547 | m_ret_val = -EINVAL; | |
548 | close_local_image(); | |
549 | return; | |
550 | } | |
551 | ||
552 | local_tag_tid = local_image_ctx->journal->get_tag_tid(); | |
553 | local_tag_data = local_image_ctx->journal->get_tag_data(); | |
554 | dout(20) << ": local tag " << local_tag_tid << ": " | |
555 | << local_tag_data << dendl; | |
556 | } | |
557 | ||
558 | bool remote_tag_data_valid = false; | |
559 | librbd::journal::TagData remote_tag_data; | |
560 | boost::optional<uint64_t> remote_orphan_tag_tid = | |
561 | boost::make_optional<uint64_t>(false, 0U); | |
562 | bool reconnect_orphan = false; | |
563 | ||
564 | // decode the remote tags | |
565 | for (auto &remote_tag : m_remote_tags) { | |
566 | if (local_tag_data.predecessor.commit_valid && | |
567 | local_tag_data.predecessor.mirror_uuid == m_remote_mirror_uuid && | |
568 | local_tag_data.predecessor.tag_tid > remote_tag.tid) { | |
569 | dout(20) << ": skipping processed predecessor remote tag " | |
570 | << remote_tag.tid << dendl; | |
571 | continue; | |
572 | } | |
573 | ||
574 | try { | |
575 | bufferlist::iterator it = remote_tag.data.begin(); | |
576 | ::decode(remote_tag_data, it); | |
577 | remote_tag_data_valid = true; | |
578 | } catch (const buffer::error &err) { | |
579 | derr << ": failed to decode remote tag " << remote_tag.tid << ": " | |
580 | << err.what() << dendl; | |
581 | m_ret_val = -EBADMSG; | |
582 | close_local_image(); | |
583 | return; | |
584 | } | |
585 | ||
586 | dout(10) << ": decoded remote tag " << remote_tag.tid << ": " | |
587 | << remote_tag_data << dendl; | |
588 | ||
589 | if (!local_tag_data.predecessor.commit_valid) { | |
590 | // newly synced local image (no predecessor) replays from the first tag | |
591 | if (remote_tag_data.mirror_uuid != librbd::Journal<>::LOCAL_MIRROR_UUID) { | |
592 | dout(20) << ": skipping non-primary remote tag" << dendl; | |
593 | continue; | |
594 | } | |
595 | ||
596 | dout(20) << ": using initial primary remote tag" << dendl; | |
597 | break; | |
598 | } | |
599 | ||
600 | if (local_tag_data.mirror_uuid == librbd::Journal<>::ORPHAN_MIRROR_UUID) { | |
601 | // demotion last available local epoch | |
602 | ||
603 | if (remote_tag_data.mirror_uuid == local_tag_data.mirror_uuid && | |
604 | remote_tag_data.predecessor.commit_valid && | |
605 | remote_tag_data.predecessor.tag_tid == | |
606 | local_tag_data.predecessor.tag_tid) { | |
607 | // demotion matches remote epoch | |
608 | ||
609 | if (remote_tag_data.predecessor.mirror_uuid == m_local_mirror_uuid && | |
610 | local_tag_data.predecessor.mirror_uuid == | |
611 | librbd::Journal<>::LOCAL_MIRROR_UUID) { | |
612 | // local demoted and remote has matching event | |
613 | dout(20) << ": found matching local demotion tag" << dendl; | |
614 | remote_orphan_tag_tid = remote_tag.tid; | |
615 | continue; | |
616 | } | |
617 | ||
618 | if (local_tag_data.predecessor.mirror_uuid == m_remote_mirror_uuid && | |
619 | remote_tag_data.predecessor.mirror_uuid == | |
620 | librbd::Journal<>::LOCAL_MIRROR_UUID) { | |
621 | // remote demoted and local has matching event | |
622 | dout(20) << ": found matching remote demotion tag" << dendl; | |
623 | remote_orphan_tag_tid = remote_tag.tid; | |
624 | continue; | |
625 | } | |
626 | } | |
627 | ||
628 | if (remote_tag_data.mirror_uuid == librbd::Journal<>::LOCAL_MIRROR_UUID && | |
629 | remote_tag_data.predecessor.mirror_uuid == librbd::Journal<>::ORPHAN_MIRROR_UUID && | |
630 | remote_tag_data.predecessor.commit_valid && remote_orphan_tag_tid && | |
631 | remote_tag_data.predecessor.tag_tid == *remote_orphan_tag_tid) { | |
632 | // remote promotion tag chained to remote/local demotion tag | |
633 | dout(20) << ": found chained remote promotion tag" << dendl; | |
634 | reconnect_orphan = true; | |
635 | break; | |
636 | } | |
637 | ||
638 | // promotion must follow demotion | |
639 | remote_orphan_tag_tid = boost::none; | |
640 | } | |
641 | } | |
642 | ||
643 | if (remote_tag_data_valid && | |
644 | local_tag_data.mirror_uuid == m_remote_mirror_uuid) { | |
645 | dout(20) << ": local image is in clean replay state" << dendl; | |
646 | } else if (reconnect_orphan) { | |
647 | dout(20) << ": remote image was demoted/promoted" << dendl; | |
648 | } else { | |
649 | derr << ": split-brain detected -- skipping image replay" << dendl; | |
650 | m_ret_val = -EEXIST; | |
651 | close_local_image(); | |
652 | return; | |
653 | } | |
654 | ||
655 | image_sync(); | |
656 | } | |
657 | ||
658 | template <typename I> | |
659 | void BootstrapRequest<I>::image_sync() { | |
660 | if (m_client_meta->state == librbd::journal::MIRROR_PEER_STATE_REPLAYING) { | |
661 | // clean replay state -- no image sync required | |
662 | close_remote_image(); | |
663 | return; | |
664 | } | |
665 | ||
666 | dout(20) << dendl; | |
7c673cae FG |
667 | { |
668 | Mutex::Locker locker(m_lock); | |
31f18b77 FG |
669 | if (m_canceled) { |
670 | m_ret_val = -ECANCELED; | |
671 | } else { | |
672 | assert(m_image_sync == nullptr); | |
c07f9fc5 FG |
673 | |
674 | Context *ctx = create_context_callback< | |
675 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_image_sync>(this); | |
31f18b77 FG |
676 | m_image_sync = ImageSync<I>::create( |
677 | *m_local_image_ctx, m_remote_image_ctx, m_timer, m_timer_lock, | |
678 | m_local_mirror_uuid, m_journaler, m_client_meta, m_work_queue, | |
679 | m_instance_watcher, ctx, m_progress_ctx); | |
680 | ||
681 | m_image_sync->get(); | |
c07f9fc5 FG |
682 | |
683 | m_lock.Unlock(); | |
684 | update_progress("IMAGE_SYNC"); | |
685 | m_lock.Lock(); | |
686 | ||
31f18b77 | 687 | m_image_sync->send(); |
7c673cae FG |
688 | return; |
689 | } | |
690 | } | |
691 | ||
692 | dout(10) << ": request canceled" << dendl; | |
7c673cae FG |
693 | close_remote_image(); |
694 | } | |
695 | ||
696 | template <typename I> | |
697 | void BootstrapRequest<I>::handle_image_sync(int r) { | |
698 | dout(20) << ": r=" << r << dendl; | |
699 | ||
31f18b77 FG |
700 | { |
701 | Mutex::Locker locker(m_lock); | |
31f18b77 FG |
702 | m_image_sync->put(); |
703 | m_image_sync = nullptr; | |
704 | ||
705 | if (m_canceled) { | |
706 | dout(10) << ": request canceled" << dendl; | |
707 | m_ret_val = -ECANCELED; | |
708 | } | |
709 | ||
710 | if (r < 0) { | |
711 | derr << ": failed to sync remote image: " << cpp_strerror(r) << dendl; | |
712 | m_ret_val = r; | |
713 | } | |
7c673cae FG |
714 | } |
715 | ||
716 | close_remote_image(); | |
717 | } | |
718 | ||
719 | template <typename I> | |
720 | void BootstrapRequest<I>::close_local_image() { | |
721 | dout(20) << dendl; | |
722 | ||
723 | update_progress("CLOSE_LOCAL_IMAGE"); | |
724 | ||
725 | Context *ctx = create_context_callback< | |
726 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_close_local_image>( | |
727 | this); | |
728 | CloseImageRequest<I> *request = CloseImageRequest<I>::create( | |
729 | m_local_image_ctx, ctx); | |
730 | request->send(); | |
731 | } | |
732 | ||
733 | template <typename I> | |
734 | void BootstrapRequest<I>::handle_close_local_image(int r) { | |
735 | dout(20) << ": r=" << r << dendl; | |
736 | ||
737 | if (r < 0) { | |
738 | derr << ": error encountered closing local image: " << cpp_strerror(r) | |
739 | << dendl; | |
740 | } | |
741 | ||
742 | close_remote_image(); | |
743 | } | |
744 | ||
745 | template <typename I> | |
746 | void BootstrapRequest<I>::close_remote_image() { | |
747 | dout(20) << dendl; | |
748 | ||
749 | update_progress("CLOSE_REMOTE_IMAGE"); | |
750 | ||
751 | Context *ctx = create_context_callback< | |
752 | BootstrapRequest<I>, &BootstrapRequest<I>::handle_close_remote_image>( | |
753 | this); | |
754 | CloseImageRequest<I> *request = CloseImageRequest<I>::create( | |
755 | &m_remote_image_ctx, ctx); | |
756 | request->send(); | |
757 | } | |
758 | ||
759 | template <typename I> | |
760 | void BootstrapRequest<I>::handle_close_remote_image(int r) { | |
761 | dout(20) << ": r=" << r << dendl; | |
762 | ||
763 | if (r < 0) { | |
764 | derr << ": error encountered closing remote image: " << cpp_strerror(r) | |
765 | << dendl; | |
766 | } | |
767 | ||
768 | finish(m_ret_val); | |
769 | } | |
770 | ||
771 | template <typename I> | |
772 | bool BootstrapRequest<I>::decode_client_meta() { | |
773 | dout(20) << dendl; | |
774 | ||
775 | librbd::journal::ClientData client_data; | |
776 | bufferlist::iterator it = m_client.data.begin(); | |
777 | try { | |
778 | ::decode(client_data, it); | |
779 | } catch (const buffer::error &err) { | |
780 | derr << ": failed to decode client meta data: " << err.what() << dendl; | |
781 | return false; | |
782 | } | |
783 | ||
784 | librbd::journal::MirrorPeerClientMeta *client_meta = | |
785 | boost::get<librbd::journal::MirrorPeerClientMeta>(&client_data.client_meta); | |
786 | if (client_meta == nullptr) { | |
787 | derr << ": unknown peer registration" << dendl; | |
788 | return false; | |
789 | } else if (!client_meta->image_id.empty()) { | |
790 | // have an image id -- use that to open the image | |
791 | m_local_image_id = client_meta->image_id; | |
792 | } | |
793 | ||
794 | *m_client_meta = *client_meta; | |
795 | ||
796 | dout(20) << ": client found: image_id=" << m_local_image_id | |
797 | << ", client_meta=" << *m_client_meta << dendl; | |
798 | return true; | |
799 | } | |
800 | ||
801 | template <typename I> | |
802 | void BootstrapRequest<I>::update_progress(const std::string &description) { | |
803 | dout(20) << ": " << description << dendl; | |
804 | ||
805 | if (m_progress_ctx) { | |
806 | m_progress_ctx->update_progress(description); | |
807 | } | |
808 | } | |
809 | ||
810 | } // namespace image_replayer | |
811 | } // namespace mirror | |
812 | } // namespace rbd | |
813 | ||
814 | template class rbd::mirror::image_replayer::BootstrapRequest<librbd::ImageCtx>; |