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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 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "MDSRank.h" | |
16 | #include "MDCache.h" | |
17 | #include "CInode.h" | |
18 | #include "CDir.h" | |
19 | #include "CDentry.h" | |
20 | #include "Migrator.h" | |
21 | #include "Locker.h" | |
22 | #include "Server.h" | |
23 | ||
24 | #include "MDBalancer.h" | |
25 | #include "MDLog.h" | |
26 | #include "MDSMap.h" | |
27 | #include "Mutation.h" | |
28 | ||
29 | #include "include/filepath.h" | |
28e407b8 | 30 | #include "common/likely.h" |
7c673cae FG |
31 | |
32 | #include "events/EExport.h" | |
33 | #include "events/EImportStart.h" | |
34 | #include "events/EImportFinish.h" | |
35 | #include "events/ESessions.h" | |
36 | ||
37 | #include "msg/Messenger.h" | |
38 | ||
39 | #include "messages/MClientCaps.h" | |
40 | ||
41 | #include "messages/MExportDirDiscover.h" | |
42 | #include "messages/MExportDirDiscoverAck.h" | |
43 | #include "messages/MExportDirCancel.h" | |
44 | #include "messages/MExportDirPrep.h" | |
45 | #include "messages/MExportDirPrepAck.h" | |
46 | #include "messages/MExportDir.h" | |
47 | #include "messages/MExportDirAck.h" | |
48 | #include "messages/MExportDirNotify.h" | |
49 | #include "messages/MExportDirNotifyAck.h" | |
50 | #include "messages/MExportDirFinish.h" | |
51 | ||
52 | #include "messages/MExportCaps.h" | |
53 | #include "messages/MExportCapsAck.h" | |
54 | #include "messages/MGatherCaps.h" | |
55 | ||
56 | ||
57 | /* | |
58 | * this is what the dir->dir_auth values look like | |
59 | * | |
60 | * dir_auth authbits | |
61 | * export | |
62 | * me me - before | |
63 | * me, me me - still me, but preparing for export | |
64 | * me, them me - send MExportDir (peer is preparing) | |
65 | * them, me me - journaled EExport | |
66 | * them them - done | |
67 | * | |
68 | * import: | |
69 | * them them - before | |
70 | * me, them me - journaled EImportStart | |
71 | * me me - done | |
72 | * | |
73 | * which implies: | |
74 | * - auth bit is set if i am listed as first _or_ second dir_auth. | |
75 | */ | |
76 | ||
77 | #include "common/config.h" | |
78 | ||
79 | ||
80 | #define dout_context g_ceph_context | |
81 | #define dout_subsys ceph_subsys_mds | |
82 | #undef dout_prefix | |
83 | #define dout_prefix *_dout << "mds." << mds->get_nodeid() << ".migrator " | |
84 | ||
85 | ||
86 | class MigratorContext : public MDSInternalContextBase { | |
87 | protected: | |
88 | Migrator *mig; | |
89 | MDSRank *get_mds() override { | |
90 | return mig->mds; | |
91 | } | |
92 | public: | |
93 | explicit MigratorContext(Migrator *mig_) : mig(mig_) { | |
94 | assert(mig != NULL); | |
95 | } | |
96 | }; | |
97 | ||
98 | class MigratorLogContext : public MDSLogContextBase { | |
99 | protected: | |
100 | Migrator *mig; | |
101 | MDSRank *get_mds() override { | |
102 | return mig->mds; | |
103 | } | |
104 | public: | |
105 | explicit MigratorLogContext(Migrator *mig_) : mig(mig_) { | |
106 | assert(mig != NULL); | |
107 | } | |
108 | }; | |
109 | ||
110 | /* This function DOES put the passed message before returning*/ | |
111 | void Migrator::dispatch(Message *m) | |
112 | { | |
1adf2230 AA |
113 | if (unlikely(inject_message_loss)) { |
114 | if (inject_message_loss == m->get_type() - MDS_PORT_MIGRATOR) { | |
115 | dout(0) << "inject message loss " << *m << dendl; | |
116 | m->put(); | |
117 | return; | |
118 | } | |
119 | } | |
120 | ||
7c673cae FG |
121 | switch (m->get_type()) { |
122 | // import | |
123 | case MSG_MDS_EXPORTDIRDISCOVER: | |
124 | handle_export_discover(static_cast<MExportDirDiscover*>(m)); | |
125 | break; | |
126 | case MSG_MDS_EXPORTDIRPREP: | |
127 | handle_export_prep(static_cast<MExportDirPrep*>(m)); | |
128 | break; | |
129 | case MSG_MDS_EXPORTDIR: | |
28e407b8 AA |
130 | if (unlikely(inject_session_race)) { |
131 | dout(0) << "waiting for inject_session_race" << dendl; | |
132 | mds->wait_for_any_client_connection(new C_MDS_RetryMessage(mds, m)); | |
133 | } else { | |
134 | handle_export_dir(static_cast<MExportDir*>(m)); | |
135 | } | |
7c673cae FG |
136 | break; |
137 | case MSG_MDS_EXPORTDIRFINISH: | |
138 | handle_export_finish(static_cast<MExportDirFinish*>(m)); | |
139 | break; | |
140 | case MSG_MDS_EXPORTDIRCANCEL: | |
141 | handle_export_cancel(static_cast<MExportDirCancel*>(m)); | |
142 | break; | |
143 | ||
144 | // export | |
145 | case MSG_MDS_EXPORTDIRDISCOVERACK: | |
146 | handle_export_discover_ack(static_cast<MExportDirDiscoverAck*>(m)); | |
147 | break; | |
148 | case MSG_MDS_EXPORTDIRPREPACK: | |
149 | handle_export_prep_ack(static_cast<MExportDirPrepAck*>(m)); | |
150 | break; | |
151 | case MSG_MDS_EXPORTDIRACK: | |
152 | handle_export_ack(static_cast<MExportDirAck*>(m)); | |
153 | break; | |
154 | case MSG_MDS_EXPORTDIRNOTIFYACK: | |
155 | handle_export_notify_ack(static_cast<MExportDirNotifyAck*>(m)); | |
156 | break; | |
157 | ||
158 | // export 3rd party (dir_auth adjustments) | |
159 | case MSG_MDS_EXPORTDIRNOTIFY: | |
160 | handle_export_notify(static_cast<MExportDirNotify*>(m)); | |
161 | break; | |
162 | ||
163 | // caps | |
164 | case MSG_MDS_EXPORTCAPS: | |
165 | handle_export_caps(static_cast<MExportCaps*>(m)); | |
166 | break; | |
1adf2230 AA |
167 | case MSG_MDS_EXPORTCAPSACK: |
168 | handle_export_caps_ack(static_cast<MExportCapsAck*>(m)); | |
169 | break; | |
7c673cae FG |
170 | case MSG_MDS_GATHERCAPS: |
171 | handle_gather_caps(static_cast<MGatherCaps*>(m)); | |
172 | break; | |
173 | ||
174 | default: | |
175 | derr << "migrator unknown message " << m->get_type() << dendl; | |
176 | assert(0 == "migrator unknown message"); | |
177 | } | |
178 | } | |
179 | ||
180 | ||
181 | class C_MDC_EmptyImport : public MigratorContext { | |
182 | CDir *dir; | |
183 | public: | |
184 | C_MDC_EmptyImport(Migrator *m, CDir *d) : MigratorContext(m), dir(d) {} | |
185 | void finish(int r) override { | |
186 | mig->export_empty_import(dir); | |
187 | } | |
188 | }; | |
189 | ||
190 | ||
191 | void Migrator::export_empty_import(CDir *dir) | |
192 | { | |
193 | dout(7) << "export_empty_import " << *dir << dendl; | |
194 | assert(dir->is_subtree_root()); | |
195 | ||
196 | if (dir->inode->is_auth()) { | |
197 | dout(7) << " inode is auth" << dendl; | |
198 | return; | |
199 | } | |
200 | if (!dir->is_auth()) { | |
201 | dout(7) << " not auth" << dendl; | |
202 | return; | |
203 | } | |
204 | if (dir->is_freezing() || dir->is_frozen()) { | |
205 | dout(7) << " freezing or frozen" << dendl; | |
206 | return; | |
207 | } | |
208 | if (dir->get_num_head_items() > 0) { | |
209 | dout(7) << " not actually empty" << dendl; | |
210 | return; | |
211 | } | |
212 | if (dir->inode->is_root()) { | |
213 | dout(7) << " root" << dendl; | |
214 | return; | |
215 | } | |
216 | ||
217 | mds_rank_t dest = dir->inode->authority().first; | |
218 | //if (mds->is_shutting_down()) dest = 0; // this is more efficient. | |
219 | ||
220 | dout(7) << " really empty, exporting to " << dest << dendl; | |
221 | assert (dest != mds->get_nodeid()); | |
222 | ||
223 | dout(7) << "exporting to mds." << dest | |
224 | << " empty import " << *dir << dendl; | |
225 | export_dir( dir, dest ); | |
226 | } | |
227 | ||
228 | void Migrator::find_stale_export_freeze() | |
229 | { | |
230 | utime_t now = ceph_clock_now(); | |
231 | utime_t cutoff = now; | |
232 | cutoff -= g_conf->mds_freeze_tree_timeout; | |
233 | ||
234 | ||
235 | /* | |
236 | * We could have situations like: | |
237 | * | |
238 | * - mds.0 authpins an item in subtree A | |
239 | * - mds.0 sends request to mds.1 to authpin an item in subtree B | |
240 | * - mds.0 freezes subtree A | |
241 | * - mds.1 authpins an item in subtree B | |
242 | * - mds.1 sends request to mds.0 to authpin an item in subtree A | |
243 | * - mds.1 freezes subtree B | |
244 | * - mds.1 receives the remote authpin request from mds.0 | |
245 | * (wait because subtree B is freezing) | |
246 | * - mds.0 receives the remote authpin request from mds.1 | |
247 | * (wait because subtree A is freezing) | |
248 | * | |
249 | * | |
250 | * - client request authpins items in subtree B | |
251 | * - freeze subtree B | |
252 | * - import subtree A which is parent of subtree B | |
253 | * (authpins parent inode of subtree B, see CDir::set_dir_auth()) | |
254 | * - freeze subtree A | |
255 | * - client request tries authpinning items in subtree A | |
256 | * (wait because subtree A is freezing) | |
257 | */ | |
258 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
259 | p != export_state.end(); ) { | |
260 | CDir* dir = p->first; | |
261 | export_state_t& stat = p->second; | |
262 | ++p; | |
263 | if (stat.state != EXPORT_DISCOVERING && stat.state != EXPORT_FREEZING) | |
264 | continue; | |
265 | if (stat.last_cum_auth_pins != dir->get_cum_auth_pins()) { | |
266 | stat.last_cum_auth_pins = dir->get_cum_auth_pins(); | |
267 | stat.last_cum_auth_pins_change = now; | |
268 | continue; | |
269 | } | |
270 | if (stat.last_cum_auth_pins_change >= cutoff) | |
271 | continue; | |
272 | if (stat.num_remote_waiters > 0 || | |
273 | (!dir->inode->is_root() && dir->get_parent_dir()->is_freezing())) { | |
274 | export_try_cancel(dir); | |
275 | } | |
276 | } | |
277 | } | |
278 | ||
279 | void Migrator::export_try_cancel(CDir *dir, bool notify_peer) | |
280 | { | |
281 | dout(10) << "export_try_cancel " << *dir << dendl; | |
282 | ||
283 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
284 | assert(it != export_state.end()); | |
285 | ||
286 | int state = it->second.state; | |
287 | switch (state) { | |
288 | case EXPORT_LOCKING: | |
289 | dout(10) << "export state=locking : dropping locks and removing auth_pin" << dendl; | |
290 | it->second.state = EXPORT_CANCELLED; | |
291 | dir->auth_unpin(this); | |
292 | break; | |
293 | case EXPORT_DISCOVERING: | |
294 | dout(10) << "export state=discovering : canceling freeze and removing auth_pin" << dendl; | |
295 | it->second.state = EXPORT_CANCELLED; | |
296 | dir->unfreeze_tree(); // cancel the freeze | |
297 | dir->auth_unpin(this); | |
298 | if (notify_peer && | |
299 | (!mds->is_cluster_degraded() || | |
300 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
301 | mds->send_message_mds(new MExportDirCancel(dir->dirfrag(), it->second.tid), it->second.peer); | |
302 | break; | |
303 | ||
304 | case EXPORT_FREEZING: | |
305 | dout(10) << "export state=freezing : canceling freeze" << dendl; | |
306 | it->second.state = EXPORT_CANCELLED; | |
307 | dir->unfreeze_tree(); // cancel the freeze | |
224ce89b WB |
308 | if (dir->is_subtree_root()) |
309 | cache->try_subtree_merge(dir); | |
7c673cae FG |
310 | if (notify_peer && |
311 | (!mds->is_cluster_degraded() || | |
312 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
313 | mds->send_message_mds(new MExportDirCancel(dir->dirfrag(), it->second.tid), it->second.peer); | |
314 | break; | |
315 | ||
316 | // NOTE: state order reversal, warning comes after prepping | |
317 | case EXPORT_WARNING: | |
318 | dout(10) << "export state=warning : unpinning bounds, unfreezing, notifying" << dendl; | |
319 | it->second.state = EXPORT_CANCELLING; | |
320 | // fall-thru | |
321 | ||
322 | case EXPORT_PREPPING: | |
323 | if (state != EXPORT_WARNING) { | |
324 | dout(10) << "export state=prepping : unpinning bounds, unfreezing" << dendl; | |
325 | it->second.state = EXPORT_CANCELLED; | |
326 | } | |
327 | ||
328 | { | |
329 | // unpin bounds | |
330 | set<CDir*> bounds; | |
331 | cache->get_subtree_bounds(dir, bounds); | |
332 | for (set<CDir*>::iterator q = bounds.begin(); | |
333 | q != bounds.end(); | |
334 | ++q) { | |
335 | CDir *bd = *q; | |
336 | bd->put(CDir::PIN_EXPORTBOUND); | |
337 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
338 | } | |
339 | if (state == EXPORT_WARNING) { | |
340 | // notify bystanders | |
b32b8144 | 341 | export_notify_abort(dir, it->second, bounds); |
7c673cae FG |
342 | // process delayed expires |
343 | cache->process_delayed_expire(dir); | |
344 | } | |
345 | } | |
346 | dir->unfreeze_tree(); | |
7c673cae | 347 | cache->try_subtree_merge(dir); |
b32b8144 FG |
348 | for (auto bd : it->second.residual_dirs) { |
349 | bd->unfreeze_tree(); | |
350 | cache->try_subtree_merge(bd); | |
351 | } | |
7c673cae FG |
352 | if (notify_peer && |
353 | (!mds->is_cluster_degraded() || | |
354 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
355 | mds->send_message_mds(new MExportDirCancel(dir->dirfrag(), it->second.tid), it->second.peer); | |
356 | break; | |
357 | ||
358 | case EXPORT_EXPORTING: | |
359 | dout(10) << "export state=exporting : reversing, and unfreezing" << dendl; | |
360 | it->second.state = EXPORT_CANCELLING; | |
b32b8144 | 361 | export_reverse(dir, it->second); |
7c673cae FG |
362 | break; |
363 | ||
364 | case EXPORT_LOGGINGFINISH: | |
365 | case EXPORT_NOTIFYING: | |
366 | dout(10) << "export state=loggingfinish|notifying : ignoring dest failure, we were successful." << dendl; | |
367 | // leave export_state, don't clean up now. | |
368 | break; | |
369 | case EXPORT_CANCELLING: | |
370 | break; | |
371 | ||
372 | default: | |
373 | ceph_abort(); | |
374 | } | |
375 | ||
376 | // finish clean-up? | |
377 | if (it->second.state == EXPORT_CANCELLING || | |
378 | it->second.state == EXPORT_CANCELLED) { | |
379 | MutationRef mut; | |
380 | mut.swap(it->second.mut); | |
381 | ||
382 | if (it->second.state == EXPORT_CANCELLED) { | |
383 | export_state.erase(it); | |
1adf2230 | 384 | dir->clear_exporting(); |
7c673cae FG |
385 | // send pending import_maps? |
386 | cache->maybe_send_pending_resolves(); | |
387 | } | |
388 | ||
389 | // drop locks | |
390 | if (state == EXPORT_LOCKING || state == EXPORT_DISCOVERING) { | |
391 | MDRequestRef mdr = static_cast<MDRequestImpl*>(mut.get()); | |
392 | assert(mdr); | |
393 | if (mdr->more()->waiting_on_slave.empty()) | |
394 | mds->mdcache->request_finish(mdr); | |
395 | } else if (mut) { | |
396 | mds->locker->drop_locks(mut.get()); | |
397 | mut->cleanup(); | |
398 | } | |
399 | ||
400 | cache->show_subtrees(); | |
401 | ||
402 | maybe_do_queued_export(); | |
403 | } | |
404 | } | |
405 | ||
406 | void Migrator::export_cancel_finish(CDir *dir) | |
407 | { | |
408 | assert(dir->state_test(CDir::STATE_EXPORTING)); | |
1adf2230 | 409 | dir->clear_exporting(); |
7c673cae FG |
410 | |
411 | // pinned by Migrator::export_notify_abort() | |
412 | dir->auth_unpin(this); | |
413 | // send pending import_maps? (these need to go out when all exports have finished.) | |
414 | cache->maybe_send_pending_resolves(); | |
415 | } | |
416 | ||
417 | // ========================================================== | |
418 | // mds failure handling | |
419 | ||
420 | void Migrator::handle_mds_failure_or_stop(mds_rank_t who) | |
421 | { | |
422 | dout(5) << "handle_mds_failure_or_stop mds." << who << dendl; | |
423 | ||
424 | // check my exports | |
425 | ||
426 | // first add an extra auth_pin on any freezes, so that canceling a | |
427 | // nested freeze doesn't complete one further up the hierarchy and | |
428 | // confuse the shit out of us. we'll remove it after canceling the | |
429 | // freeze. this way no freeze completions run before we want them | |
430 | // to. | |
431 | list<CDir*> pinned_dirs; | |
432 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
433 | p != export_state.end(); | |
434 | ++p) { | |
435 | if (p->second.state == EXPORT_FREEZING) { | |
436 | CDir *dir = p->first; | |
437 | dout(10) << "adding temp auth_pin on freezing " << *dir << dendl; | |
438 | dir->auth_pin(this); | |
439 | pinned_dirs.push_back(dir); | |
440 | } | |
441 | } | |
442 | ||
443 | map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
444 | while (p != export_state.end()) { | |
445 | map<CDir*,export_state_t>::iterator next = p; | |
446 | ++next; | |
447 | CDir *dir = p->first; | |
448 | ||
449 | // abort exports: | |
450 | // - that are going to the failed node | |
451 | // - that aren't frozen yet (to avoid auth_pin deadlock) | |
452 | // - they havne't prepped yet (they may need to discover bounds to do that) | |
453 | if ((p->second.peer == who && | |
454 | p->second.state != EXPORT_CANCELLING) || | |
455 | p->second.state == EXPORT_LOCKING || | |
456 | p->second.state == EXPORT_DISCOVERING || | |
457 | p->second.state == EXPORT_FREEZING || | |
458 | p->second.state == EXPORT_PREPPING) { | |
459 | // the guy i'm exporting to failed, or we're just freezing. | |
460 | dout(10) << "cleaning up export state (" << p->second.state << ")" | |
461 | << get_export_statename(p->second.state) << " of " << *dir << dendl; | |
462 | export_try_cancel(dir); | |
463 | } else if (p->second.peer != who) { | |
464 | // bystander failed. | |
465 | if (p->second.warning_ack_waiting.erase(who)) { | |
466 | if (p->second.state == EXPORT_WARNING) { | |
467 | p->second.notify_ack_waiting.erase(who); // they won't get a notify either. | |
468 | // exporter waiting for warning acks, let's fake theirs. | |
469 | dout(10) << "faking export_warning_ack from mds." << who | |
470 | << " on " << *dir << " to mds." << p->second.peer | |
471 | << dendl; | |
472 | if (p->second.warning_ack_waiting.empty()) | |
473 | export_go(dir); | |
474 | } | |
475 | } | |
476 | if (p->second.notify_ack_waiting.erase(who)) { | |
477 | // exporter is waiting for notify acks, fake it | |
478 | dout(10) << "faking export_notify_ack from mds." << who | |
479 | << " on " << *dir << " to mds." << p->second.peer | |
480 | << dendl; | |
481 | if (p->second.state == EXPORT_NOTIFYING) { | |
482 | if (p->second.notify_ack_waiting.empty()) | |
483 | export_finish(dir); | |
484 | } else if (p->second.state == EXPORT_CANCELLING) { | |
485 | if (p->second.notify_ack_waiting.empty()) { | |
486 | export_state.erase(p); | |
487 | export_cancel_finish(dir); | |
488 | } | |
489 | } | |
490 | } | |
491 | } | |
492 | ||
493 | // next! | |
494 | p = next; | |
495 | } | |
496 | ||
497 | ||
498 | // check my imports | |
499 | map<dirfrag_t,import_state_t>::iterator q = import_state.begin(); | |
500 | while (q != import_state.end()) { | |
501 | map<dirfrag_t,import_state_t>::iterator next = q; | |
502 | ++next; | |
503 | dirfrag_t df = q->first; | |
504 | CInode *diri = mds->mdcache->get_inode(df.ino); | |
505 | CDir *dir = mds->mdcache->get_dirfrag(df); | |
506 | ||
507 | if (q->second.peer == who) { | |
508 | if (dir) | |
509 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
510 | << get_import_statename(q->second.state) << " of " << *dir << dendl; | |
511 | else | |
512 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
513 | << get_import_statename(q->second.state) << " of " << df << dendl; | |
514 | ||
515 | switch (q->second.state) { | |
516 | case IMPORT_DISCOVERING: | |
517 | dout(10) << "import state=discovering : clearing state" << dendl; | |
518 | import_reverse_discovering(df); | |
519 | break; | |
520 | ||
521 | case IMPORT_DISCOVERED: | |
522 | assert(diri); | |
523 | dout(10) << "import state=discovered : unpinning inode " << *diri << dendl; | |
524 | import_reverse_discovered(df, diri); | |
525 | break; | |
526 | ||
527 | case IMPORT_PREPPING: | |
528 | assert(dir); | |
529 | dout(10) << "import state=prepping : unpinning base+bounds " << *dir << dendl; | |
b32b8144 | 530 | import_reverse_prepping(dir, q->second); |
7c673cae FG |
531 | break; |
532 | ||
533 | case IMPORT_PREPPED: | |
534 | assert(dir); | |
535 | dout(10) << "import state=prepped : unpinning base+bounds, unfreezing " << *dir << dendl; | |
536 | { | |
537 | set<CDir*> bounds; | |
538 | cache->get_subtree_bounds(dir, bounds); | |
539 | import_remove_pins(dir, bounds); | |
540 | ||
541 | // adjust auth back to the exporter | |
542 | cache->adjust_subtree_auth(dir, q->second.peer); | |
7c673cae FG |
543 | |
544 | // notify bystanders ; wait in aborting state | |
b32b8144 | 545 | q->second.state = IMPORT_ABORTING; |
7c673cae FG |
546 | import_notify_abort(dir, bounds); |
547 | assert(g_conf->mds_kill_import_at != 10); | |
548 | } | |
549 | break; | |
550 | ||
551 | case IMPORT_LOGGINGSTART: | |
552 | assert(dir); | |
553 | dout(10) << "import state=loggingstart : reversing import on " << *dir << dendl; | |
554 | import_reverse(dir); | |
555 | break; | |
556 | ||
557 | case IMPORT_ACKING: | |
558 | assert(dir); | |
559 | // hrm. make this an ambiguous import, and wait for exporter recovery to disambiguate | |
560 | dout(10) << "import state=acking : noting ambiguous import " << *dir << dendl; | |
561 | { | |
562 | set<CDir*> bounds; | |
563 | cache->get_subtree_bounds(dir, bounds); | |
564 | cache->add_ambiguous_import(dir, bounds); | |
565 | } | |
566 | break; | |
567 | ||
568 | case IMPORT_FINISHING: | |
569 | assert(dir); | |
570 | dout(10) << "import state=finishing : finishing import on " << *dir << dendl; | |
571 | import_finish(dir, true); | |
572 | break; | |
573 | ||
574 | case IMPORT_ABORTING: | |
575 | assert(dir); | |
576 | dout(10) << "import state=aborting : ignoring repeat failure " << *dir << dendl; | |
577 | break; | |
578 | } | |
579 | } else { | |
580 | auto bystanders_entry = q->second.bystanders.find(who); | |
581 | if (bystanders_entry != q->second.bystanders.end()) { | |
582 | q->second.bystanders.erase(bystanders_entry); | |
583 | if (q->second.state == IMPORT_ABORTING) { | |
584 | assert(dir); | |
585 | dout(10) << "faking export_notify_ack from mds." << who | |
586 | << " on aborting import " << *dir << " from mds." << q->second.peer | |
587 | << dendl; | |
224ce89b | 588 | if (q->second.bystanders.empty()) |
7c673cae | 589 | import_reverse_unfreeze(dir); |
7c673cae FG |
590 | } |
591 | } | |
592 | } | |
593 | ||
594 | // next! | |
595 | q = next; | |
596 | } | |
597 | ||
598 | while (!pinned_dirs.empty()) { | |
599 | CDir *dir = pinned_dirs.front(); | |
600 | dout(10) << "removing temp auth_pin on " << *dir << dendl; | |
601 | dir->auth_unpin(this); | |
602 | pinned_dirs.pop_front(); | |
603 | } | |
604 | } | |
605 | ||
606 | ||
607 | ||
608 | void Migrator::show_importing() | |
609 | { | |
610 | dout(10) << "show_importing" << dendl; | |
611 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); | |
612 | p != import_state.end(); | |
613 | ++p) { | |
614 | CDir *dir = mds->mdcache->get_dirfrag(p->first); | |
615 | if (dir) { | |
616 | dout(10) << " importing from " << p->second.peer | |
617 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
618 | << " " << p->first << " " << *dir << dendl; | |
619 | } else { | |
620 | dout(10) << " importing from " << p->second.peer | |
621 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
622 | << " " << p->first << dendl; | |
623 | } | |
624 | } | |
625 | } | |
626 | ||
627 | void Migrator::show_exporting() | |
628 | { | |
629 | dout(10) << "show_exporting" << dendl; | |
630 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
631 | p != export_state.end(); | |
632 | ++p) | |
633 | dout(10) << " exporting to " << p->second.peer | |
634 | << ": (" << p->second.state << ") " << get_export_statename(p->second.state) | |
635 | << " " << p->first->dirfrag() << " " << *p->first << dendl; | |
636 | } | |
637 | ||
638 | ||
639 | ||
640 | void Migrator::audit() | |
641 | { | |
642 | if (!g_conf->subsys.should_gather(ceph_subsys_mds, 5)) | |
643 | return; // hrm. | |
644 | ||
645 | // import_state | |
646 | show_importing(); | |
647 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); | |
648 | p != import_state.end(); | |
649 | ++p) { | |
650 | if (p->second.state == IMPORT_DISCOVERING) | |
651 | continue; | |
652 | if (p->second.state == IMPORT_DISCOVERED) { | |
653 | CInode *in = cache->get_inode(p->first.ino); | |
654 | assert(in); | |
655 | continue; | |
656 | } | |
657 | CDir *dir = cache->get_dirfrag(p->first); | |
658 | assert(dir); | |
659 | if (p->second.state == IMPORT_PREPPING) | |
660 | continue; | |
661 | if (p->second.state == IMPORT_ABORTING) { | |
662 | assert(!dir->is_ambiguous_dir_auth()); | |
663 | assert(dir->get_dir_auth().first != mds->get_nodeid()); | |
664 | continue; | |
665 | } | |
666 | assert(dir->is_ambiguous_dir_auth()); | |
667 | assert(dir->authority().first == mds->get_nodeid() || | |
668 | dir->authority().second == mds->get_nodeid()); | |
669 | } | |
670 | ||
671 | // export_state | |
672 | show_exporting(); | |
673 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
674 | p != export_state.end(); | |
675 | ++p) { | |
676 | CDir *dir = p->first; | |
677 | if (p->second.state == EXPORT_LOCKING || | |
678 | p->second.state == EXPORT_DISCOVERING || | |
679 | p->second.state == EXPORT_FREEZING || | |
680 | p->second.state == EXPORT_CANCELLING) | |
681 | continue; | |
682 | assert(dir->is_ambiguous_dir_auth()); | |
683 | assert(dir->authority().first == mds->get_nodeid() || | |
684 | dir->authority().second == mds->get_nodeid()); | |
685 | } | |
686 | ||
687 | // ambiguous+me subtrees should be importing|exporting | |
688 | ||
689 | // write me | |
690 | } | |
691 | ||
692 | ||
693 | ||
694 | ||
695 | ||
696 | // ========================================================== | |
697 | // EXPORT | |
698 | ||
699 | void Migrator::export_dir_nicely(CDir *dir, mds_rank_t dest) | |
700 | { | |
701 | // enqueue | |
702 | dout(7) << "export_dir_nicely " << *dir << " to " << dest << dendl; | |
703 | export_queue.push_back(pair<dirfrag_t,mds_rank_t>(dir->dirfrag(), dest)); | |
704 | ||
705 | maybe_do_queued_export(); | |
706 | } | |
707 | ||
708 | void Migrator::maybe_do_queued_export() | |
709 | { | |
710 | static bool running; | |
711 | if (running) | |
712 | return; | |
713 | running = true; | |
714 | while (!export_queue.empty() && | |
715 | export_state.size() <= 4) { | |
716 | dirfrag_t df = export_queue.front().first; | |
717 | mds_rank_t dest = export_queue.front().second; | |
718 | export_queue.pop_front(); | |
719 | ||
720 | CDir *dir = mds->mdcache->get_dirfrag(df); | |
721 | if (!dir) continue; | |
722 | if (!dir->is_auth()) continue; | |
723 | ||
724 | dout(0) << "nicely exporting to mds." << dest << " " << *dir << dendl; | |
725 | ||
726 | export_dir(dir, dest); | |
727 | } | |
728 | running = false; | |
729 | } | |
730 | ||
731 | ||
732 | ||
733 | ||
734 | class C_MDC_ExportFreeze : public MigratorContext { | |
735 | CDir *ex; // dir i'm exporting | |
736 | uint64_t tid; | |
737 | public: | |
738 | C_MDC_ExportFreeze(Migrator *m, CDir *e, uint64_t t) : | |
739 | MigratorContext(m), ex(e), tid(t) { | |
740 | assert(ex != NULL); | |
741 | } | |
742 | void finish(int r) override { | |
743 | if (r >= 0) | |
744 | mig->export_frozen(ex, tid); | |
745 | } | |
746 | }; | |
747 | ||
748 | ||
749 | void Migrator::get_export_lock_set(CDir *dir, set<SimpleLock*>& locks) | |
750 | { | |
751 | // path | |
752 | vector<CDentry*> trace; | |
753 | cache->make_trace(trace, dir->inode); | |
754 | for (vector<CDentry*>::iterator it = trace.begin(); | |
755 | it != trace.end(); | |
756 | ++it) | |
757 | locks.insert(&(*it)->lock); | |
758 | ||
759 | // prevent scatter gather race | |
760 | locks.insert(&dir->get_inode()->dirfragtreelock); | |
761 | ||
762 | // bound dftlocks: | |
763 | // NOTE: We need to take an rdlock on bounding dirfrags during | |
764 | // migration for a rather irritating reason: when we export the | |
765 | // bound inode, we need to send scatterlock state for the dirfrags | |
766 | // as well, so that the new auth also gets the correct info. If we | |
767 | // race with a refragment, this info is useless, as we can't | |
768 | // redivvy it up. And it's needed for the scatterlocks to work | |
769 | // properly: when the auth is in a sync/lock state it keeps each | |
770 | // dirfrag's portion in the local (auth OR replica) dirfrag. | |
771 | set<CDir*> wouldbe_bounds; | |
772 | cache->get_wouldbe_subtree_bounds(dir, wouldbe_bounds); | |
773 | for (set<CDir*>::iterator p = wouldbe_bounds.begin(); p != wouldbe_bounds.end(); ++p) | |
774 | locks.insert(&(*p)->get_inode()->dirfragtreelock); | |
775 | } | |
776 | ||
777 | ||
31f18b77 | 778 | class C_M_ExportDirWait : public MigratorContext { |
7c673cae FG |
779 | MDRequestRef mdr; |
780 | int count; | |
781 | public: | |
31f18b77 | 782 | C_M_ExportDirWait(Migrator *m, MDRequestRef mdr, int count) |
7c673cae FG |
783 | : MigratorContext(m), mdr(mdr), count(count) {} |
784 | void finish(int r) override { | |
785 | mig->dispatch_export_dir(mdr, count); | |
786 | } | |
787 | }; | |
788 | ||
789 | ||
790 | /** export_dir(dir, dest) | |
791 | * public method to initiate an export. | |
792 | * will fail if the directory is freezing, frozen, unpinnable, or root. | |
793 | */ | |
794 | void Migrator::export_dir(CDir *dir, mds_rank_t dest) | |
795 | { | |
796 | dout(7) << "export_dir " << *dir << " to " << dest << dendl; | |
797 | assert(dir->is_auth()); | |
798 | assert(dest != mds->get_nodeid()); | |
799 | ||
181888fb FG |
800 | if (!(mds->is_active() || mds->is_stopping())) { |
801 | dout(7) << "i'm not active, no exports for now" << dendl; | |
802 | return; | |
803 | } | |
7c673cae FG |
804 | if (mds->mdcache->is_readonly()) { |
805 | dout(7) << "read-only FS, no exports for now" << dendl; | |
806 | return; | |
807 | } | |
31f18b77 FG |
808 | if (!mds->mdsmap->is_active(dest)) { |
809 | dout(7) << "dest not active, no exports for now" << dendl; | |
810 | return; | |
811 | } | |
7c673cae FG |
812 | if (mds->is_cluster_degraded()) { |
813 | dout(7) << "cluster degraded, no exports for now" << dendl; | |
814 | return; | |
815 | } | |
816 | if (dir->inode->is_system()) { | |
817 | dout(7) << "i won't export system dirs (root, mdsdirs, stray, /.ceph, etc.)" << dendl; | |
818 | //ceph_abort(); | |
819 | return; | |
820 | } | |
821 | ||
b32b8144 FG |
822 | CDir* parent_dir = dir->inode->get_projected_parent_dir(); |
823 | if (parent_dir && parent_dir->inode->is_stray()) { | |
824 | if (parent_dir->get_parent_dir()->ino() != MDS_INO_MDSDIR(dest)) { | |
825 | dout(7) << "i won't export anything in stray" << dendl; | |
826 | return; | |
827 | } | |
828 | } else { | |
829 | if (!mds->is_stopping() && !dir->inode->is_exportable(dest)) { | |
830 | dout(7) << "dir is export pinned" << dendl; | |
831 | return; | |
832 | } | |
7c673cae FG |
833 | } |
834 | ||
835 | if (dir->is_frozen() || | |
836 | dir->is_freezing()) { | |
837 | dout(7) << " can't export, freezing|frozen. wait for other exports to finish first." << dendl; | |
838 | return; | |
839 | } | |
840 | if (dir->state_test(CDir::STATE_EXPORTING)) { | |
841 | dout(7) << "already exporting" << dendl; | |
842 | return; | |
843 | } | |
844 | ||
7c673cae FG |
845 | if (g_conf->mds_thrash_exports) { |
846 | // create random subtree bound (which will not be exported) | |
847 | list<CDir*> ls; | |
848 | for (auto p = dir->begin(); p != dir->end(); ++p) { | |
849 | auto dn = p->second; | |
850 | CDentry::linkage_t *dnl= dn->get_linkage(); | |
851 | if (dnl->is_primary()) { | |
852 | CInode *in = dnl->get_inode(); | |
853 | if (in->is_dir()) | |
854 | in->get_nested_dirfrags(ls); | |
855 | } | |
856 | } | |
857 | if (ls.size() > 0) { | |
858 | int n = rand() % ls.size(); | |
859 | auto p = ls.begin(); | |
860 | while (n--) ++p; | |
861 | CDir *bd = *p; | |
862 | if (!(bd->is_frozen() || bd->is_freezing())) { | |
863 | assert(bd->is_auth()); | |
864 | dir->state_set(CDir::STATE_AUXSUBTREE); | |
865 | mds->mdcache->adjust_subtree_auth(dir, mds->get_nodeid()); | |
866 | dout(0) << "export_dir: create aux subtree " << *bd << " under " << *dir << dendl; | |
867 | } | |
868 | } | |
869 | } | |
870 | ||
871 | mds->hit_export_target(ceph_clock_now(), dest, -1); | |
872 | ||
873 | dir->auth_pin(this); | |
1adf2230 | 874 | dir->mark_exporting(); |
7c673cae FG |
875 | |
876 | MDRequestRef mdr = mds->mdcache->request_start_internal(CEPH_MDS_OP_EXPORTDIR); | |
877 | mdr->more()->export_dir = dir; | |
878 | ||
879 | assert(export_state.count(dir) == 0); | |
880 | export_state_t& stat = export_state[dir]; | |
881 | stat.state = EXPORT_LOCKING; | |
882 | stat.peer = dest; | |
883 | stat.tid = mdr->reqid.tid; | |
884 | stat.mut = mdr; | |
885 | ||
886 | return mds->mdcache->dispatch_request(mdr); | |
887 | } | |
888 | ||
889 | void Migrator::dispatch_export_dir(MDRequestRef& mdr, int count) | |
890 | { | |
891 | dout(7) << "dispatch_export_dir " << *mdr << dendl; | |
892 | ||
893 | CDir *dir = mdr->more()->export_dir; | |
894 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
895 | if (it == export_state.end() || it->second.tid != mdr->reqid.tid) { | |
896 | // export must have aborted. | |
897 | dout(7) << "export must have aborted " << *mdr << dendl; | |
898 | mds->mdcache->request_finish(mdr); | |
899 | return; | |
900 | } | |
901 | assert(it->second.state == EXPORT_LOCKING); | |
902 | ||
903 | mds_rank_t dest = it->second.peer; | |
904 | ||
905 | if (!mds->is_export_target(dest)) { | |
906 | dout(7) << "dest is not yet an export target" << dendl; | |
907 | if (count > 3) { | |
908 | dout(5) << "dest has not been added as export target after three MDSMap epochs, canceling export" << dendl; | |
909 | export_try_cancel(dir); | |
910 | return; | |
911 | } | |
224ce89b WB |
912 | |
913 | mds->locker->drop_locks(mdr.get()); | |
914 | mdr->drop_local_auth_pins(); | |
915 | ||
31f18b77 | 916 | mds->wait_for_mdsmap(mds->mdsmap->get_epoch(), new C_M_ExportDirWait(this, mdr, count+1)); |
7c673cae FG |
917 | return; |
918 | } | |
919 | ||
920 | if (!dir->inode->get_parent_dn()) { | |
921 | dout(7) << "waiting for dir to become stable before export: " << *dir << dendl; | |
31f18b77 | 922 | dir->add_waiter(CDir::WAIT_CREATED, new C_M_ExportDirWait(this, mdr, 1)); |
7c673cae FG |
923 | return; |
924 | } | |
925 | ||
926 | if (mdr->aborted || dir->is_frozen() || dir->is_freezing()) { | |
927 | dout(7) << "wouldblock|freezing|frozen, canceling export" << dendl; | |
928 | export_try_cancel(dir); | |
929 | return; | |
930 | } | |
931 | ||
932 | // locks? | |
933 | set<SimpleLock*> rdlocks; | |
934 | set<SimpleLock*> xlocks; | |
935 | set<SimpleLock*> wrlocks; | |
936 | get_export_lock_set(dir, rdlocks); | |
937 | // If auth MDS of the subtree root inode is neither the exporter MDS | |
938 | // nor the importer MDS and it gathers subtree root's fragstat/neststat | |
939 | // while the subtree is exporting. It's possible that the exporter MDS | |
940 | // and the importer MDS both are auth MDS of the subtree root or both | |
941 | // are not auth MDS of the subtree root at the time they receive the | |
942 | // lock messages. So the auth MDS of the subtree root inode may get no | |
943 | // or duplicated fragstat/neststat for the subtree root dirfrag. | |
944 | wrlocks.insert(&dir->get_inode()->filelock); | |
945 | wrlocks.insert(&dir->get_inode()->nestlock); | |
946 | if (dir->get_inode()->is_auth()) { | |
947 | dir->get_inode()->filelock.set_scatter_wanted(); | |
948 | dir->get_inode()->nestlock.set_scatter_wanted(); | |
949 | } | |
950 | ||
951 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks, NULL, NULL, true)) { | |
952 | if (mdr->aborted) | |
953 | export_try_cancel(dir); | |
954 | return; | |
955 | } | |
956 | ||
957 | assert(g_conf->mds_kill_export_at != 1); | |
958 | it->second.state = EXPORT_DISCOVERING; | |
959 | ||
960 | // send ExportDirDiscover (ask target) | |
961 | filepath path; | |
962 | dir->inode->make_path(path); | |
963 | MExportDirDiscover *discover = new MExportDirDiscover(dir->dirfrag(), path, | |
964 | mds->get_nodeid(), | |
965 | it->second.tid); | |
966 | mds->send_message_mds(discover, dest); | |
967 | assert(g_conf->mds_kill_export_at != 2); | |
968 | ||
969 | it->second.last_cum_auth_pins_change = ceph_clock_now(); | |
970 | ||
971 | // start the freeze, but hold it up with an auth_pin. | |
972 | dir->freeze_tree(); | |
973 | assert(dir->is_freezing_tree()); | |
974 | dir->add_waiter(CDir::WAIT_FROZEN, new C_MDC_ExportFreeze(this, dir, it->second.tid)); | |
975 | } | |
976 | ||
977 | /* | |
978 | * called on receipt of MExportDirDiscoverAck | |
979 | * the importer now has the directory's _inode_ in memory, and pinned. | |
980 | * | |
981 | * This function DOES put the passed message before returning | |
982 | */ | |
983 | void Migrator::handle_export_discover_ack(MExportDirDiscoverAck *m) | |
984 | { | |
985 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
986 | mds_rank_t dest(m->get_source().num()); | |
987 | utime_t now = ceph_clock_now(); | |
988 | assert(dir); | |
989 | ||
990 | dout(7) << "export_discover_ack from " << m->get_source() | |
991 | << " on " << *dir << dendl; | |
992 | ||
993 | mds->hit_export_target(now, dest, -1); | |
994 | ||
995 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
996 | if (it == export_state.end() || | |
997 | it->second.tid != m->get_tid() || | |
998 | it->second.peer != dest) { | |
999 | dout(7) << "must have aborted" << dendl; | |
1000 | } else { | |
1001 | assert(it->second.state == EXPORT_DISCOVERING); | |
c07f9fc5 FG |
1002 | |
1003 | if (m->is_success()) { | |
1004 | // release locks to avoid deadlock | |
1005 | MDRequestRef mdr = static_cast<MDRequestImpl*>(it->second.mut.get()); | |
1006 | assert(mdr); | |
1007 | mds->mdcache->request_finish(mdr); | |
1008 | it->second.mut.reset(); | |
1009 | // freeze the subtree | |
1010 | it->second.state = EXPORT_FREEZING; | |
1011 | dir->auth_unpin(this); | |
1012 | assert(g_conf->mds_kill_export_at != 3); | |
1013 | ||
1014 | } else { | |
1015 | dout(7) << "peer failed to discover (not active?), canceling" << dendl; | |
1016 | export_try_cancel(dir, false); | |
1017 | } | |
7c673cae FG |
1018 | } |
1019 | ||
1020 | m->put(); // done | |
1021 | } | |
1022 | ||
1023 | class C_M_ExportSessionsFlushed : public MigratorContext { | |
1024 | CDir *dir; | |
1025 | uint64_t tid; | |
1026 | public: | |
1027 | C_M_ExportSessionsFlushed(Migrator *m, CDir *d, uint64_t t) | |
1028 | : MigratorContext(m), dir(d), tid(t) { | |
1029 | assert(dir != NULL); | |
1030 | } | |
1031 | void finish(int r) override { | |
1032 | mig->export_sessions_flushed(dir, tid); | |
1033 | } | |
1034 | }; | |
1035 | ||
1036 | void Migrator::export_sessions_flushed(CDir *dir, uint64_t tid) | |
1037 | { | |
1038 | dout(7) << "export_sessions_flushed " << *dir << dendl; | |
1039 | ||
1040 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1041 | if (it == export_state.end() || | |
1042 | it->second.state == EXPORT_CANCELLING || | |
1043 | it->second.tid != tid) { | |
1044 | // export must have aborted. | |
1045 | dout(7) << "export must have aborted on " << dir << dendl; | |
1046 | return; | |
1047 | } | |
1048 | ||
1049 | assert(it->second.state == EXPORT_PREPPING || it->second.state == EXPORT_WARNING); | |
1050 | assert(it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0); | |
1051 | it->second.warning_ack_waiting.erase(MDS_RANK_NONE); | |
1052 | if (it->second.state == EXPORT_WARNING && it->second.warning_ack_waiting.empty()) | |
1053 | export_go(dir); // start export. | |
1054 | } | |
1055 | ||
1056 | void Migrator::export_frozen(CDir *dir, uint64_t tid) | |
1057 | { | |
1058 | dout(7) << "export_frozen on " << *dir << dendl; | |
1059 | ||
1060 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1061 | if (it == export_state.end() || it->second.tid != tid) { | |
1062 | dout(7) << "export must have aborted" << dendl; | |
1063 | return; | |
1064 | } | |
1065 | ||
1066 | assert(it->second.state == EXPORT_FREEZING); | |
1067 | assert(dir->is_frozen_tree_root()); | |
1068 | assert(dir->get_cum_auth_pins() == 0); | |
1069 | ||
1070 | CInode *diri = dir->get_inode(); | |
1071 | ||
1072 | // ok, try to grab all my locks. | |
1073 | set<SimpleLock*> rdlocks; | |
1074 | get_export_lock_set(dir, rdlocks); | |
1075 | if ((diri->is_auth() && diri->is_frozen()) || | |
1076 | !mds->locker->can_rdlock_set(rdlocks) || | |
1077 | !diri->filelock.can_wrlock(-1) || | |
1078 | !diri->nestlock.can_wrlock(-1)) { | |
1079 | dout(7) << "export_dir couldn't acquire all needed locks, failing. " | |
1080 | << *dir << dendl; | |
7c673cae FG |
1081 | // .. unwind .. |
1082 | dir->unfreeze_tree(); | |
224ce89b | 1083 | cache->try_subtree_merge(dir); |
7c673cae FG |
1084 | |
1085 | mds->send_message_mds(new MExportDirCancel(dir->dirfrag(), it->second.tid), it->second.peer); | |
7c673cae | 1086 | export_state.erase(it); |
224ce89b | 1087 | |
1adf2230 | 1088 | dir->clear_exporting(); |
224ce89b | 1089 | cache->maybe_send_pending_resolves(); |
7c673cae FG |
1090 | return; |
1091 | } | |
1092 | ||
1093 | it->second.mut = new MutationImpl(); | |
1094 | if (diri->is_auth()) | |
1095 | it->second.mut->auth_pin(diri); | |
1096 | mds->locker->rdlock_take_set(rdlocks, it->second.mut); | |
1097 | mds->locker->wrlock_force(&diri->filelock, it->second.mut); | |
1098 | mds->locker->wrlock_force(&diri->nestlock, it->second.mut); | |
1099 | ||
1100 | cache->show_subtrees(); | |
1101 | ||
224ce89b WB |
1102 | // CDir::_freeze_tree() should have forced it into subtree. |
1103 | assert(dir->get_dir_auth() == mds_authority_t(mds->get_nodeid(), mds->get_nodeid())); | |
b32b8144 FG |
1104 | |
1105 | set<client_t> export_client_set; | |
1106 | check_export_size(dir, it->second, export_client_set); | |
1107 | ||
7c673cae | 1108 | // note the bounds. |
7c673cae FG |
1109 | set<CDir*> bounds; |
1110 | cache->get_subtree_bounds(dir, bounds); | |
1111 | ||
1112 | // generate prep message, log entry. | |
1113 | MExportDirPrep *prep = new MExportDirPrep(dir->dirfrag(), it->second.tid); | |
1114 | ||
1115 | // include list of bystanders | |
181888fb FG |
1116 | for (const auto &p : dir->get_replicas()) { |
1117 | if (p.first != it->second.peer) { | |
1118 | dout(10) << "bystander mds." << p.first << dendl; | |
1119 | prep->add_bystander(p.first); | |
7c673cae FG |
1120 | } |
1121 | } | |
1122 | ||
1123 | // include base dirfrag | |
1124 | cache->replicate_dir(dir, it->second.peer, prep->basedir); | |
1125 | ||
1126 | /* | |
1127 | * include spanning tree for all nested exports. | |
1128 | * these need to be on the destination _before_ the final export so that | |
1129 | * dir_auth updates on any nested exports are properly absorbed. | |
1130 | * this includes inodes and dirfrags included in the subtree, but | |
1131 | * only the inodes at the bounds. | |
1132 | * | |
1133 | * each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
1134 | */ | |
1135 | set<inodeno_t> inodes_added; | |
1136 | set<dirfrag_t> dirfrags_added; | |
1137 | ||
1138 | // check bounds | |
1139 | for (set<CDir*>::iterator p = bounds.begin(); | |
1140 | p != bounds.end(); | |
1141 | ++p) { | |
1142 | CDir *bound = *p; | |
1143 | ||
1144 | // pin it. | |
b32b8144 | 1145 | assert(bound->state_test(CDir::STATE_EXPORTBOUND)); |
7c673cae FG |
1146 | |
1147 | dout(7) << " export bound " << *bound << dendl; | |
1148 | prep->add_bound( bound->dirfrag() ); | |
1149 | ||
1150 | // trace to bound | |
1151 | bufferlist tracebl; | |
1152 | CDir *cur = bound; | |
b32b8144 | 1153 | |
7c673cae | 1154 | char start = '-'; |
b32b8144 FG |
1155 | if (it->second.residual_dirs.count(bound)) { |
1156 | start = 'f'; | |
1157 | cache->replicate_dir(bound, it->second.peer, tracebl); | |
1158 | dout(7) << " added " << *bound << dendl; | |
1159 | } | |
1160 | ||
7c673cae FG |
1161 | while (1) { |
1162 | // don't repeat inodes | |
1163 | if (inodes_added.count(cur->inode->ino())) | |
1164 | break; | |
1165 | inodes_added.insert(cur->inode->ino()); | |
1166 | ||
1167 | // prepend dentry + inode | |
1168 | assert(cur->inode->is_auth()); | |
1169 | bufferlist bl; | |
1170 | cache->replicate_dentry(cur->inode->parent, it->second.peer, bl); | |
1171 | dout(7) << " added " << *cur->inode->parent << dendl; | |
1172 | cache->replicate_inode(cur->inode, it->second.peer, bl, | |
1173 | mds->mdsmap->get_up_features()); | |
1174 | dout(7) << " added " << *cur->inode << dendl; | |
1175 | bl.claim_append(tracebl); | |
1176 | tracebl.claim(bl); | |
1177 | ||
1178 | cur = cur->get_parent_dir(); | |
1179 | ||
1180 | // don't repeat dirfrags | |
1181 | if (dirfrags_added.count(cur->dirfrag()) || | |
1182 | cur == dir) { | |
1183 | start = 'd'; // start with dentry | |
1184 | break; | |
1185 | } | |
1186 | dirfrags_added.insert(cur->dirfrag()); | |
1187 | ||
1188 | // prepend dir | |
1189 | cache->replicate_dir(cur, it->second.peer, bl); | |
1190 | dout(7) << " added " << *cur << dendl; | |
1191 | bl.claim_append(tracebl); | |
1192 | tracebl.claim(bl); | |
1193 | ||
1194 | start = 'f'; // start with dirfrag | |
1195 | } | |
1196 | bufferlist final_bl; | |
1197 | dirfrag_t df = cur->dirfrag(); | |
1198 | ::encode(df, final_bl); | |
1199 | ::encode(start, final_bl); | |
1200 | final_bl.claim_append(tracebl); | |
1201 | prep->add_trace(final_bl); | |
1202 | } | |
1203 | ||
1204 | // send. | |
1205 | it->second.state = EXPORT_PREPPING; | |
1206 | mds->send_message_mds(prep, it->second.peer); | |
1207 | assert (g_conf->mds_kill_export_at != 4); | |
1208 | ||
1209 | // make sure any new instantiations of caps are flushed out | |
1210 | assert(it->second.warning_ack_waiting.empty()); | |
1211 | ||
7c673cae FG |
1212 | MDSGatherBuilder gather(g_ceph_context); |
1213 | mds->server->flush_client_sessions(export_client_set, gather); | |
1214 | if (gather.has_subs()) { | |
1215 | it->second.warning_ack_waiting.insert(MDS_RANK_NONE); | |
1216 | gather.set_finisher(new C_M_ExportSessionsFlushed(this, dir, it->second.tid)); | |
1217 | gather.activate(); | |
1218 | } | |
1219 | } | |
1220 | ||
b32b8144 | 1221 | void Migrator::check_export_size(CDir *dir, export_state_t& stat, set<client_t>& client_set) |
7c673cae | 1222 | { |
b32b8144 FG |
1223 | const unsigned frag_size = 800; |
1224 | const unsigned inode_size = 1000; | |
1225 | const unsigned cap_size = 80; | |
1226 | const unsigned link_size = 10; | |
1227 | const unsigned null_size = 1; | |
1228 | ||
1229 | uint64_t max_size = g_conf->get_val<uint64_t>("mds_max_export_size"); | |
1230 | uint64_t approx_size = 0; | |
1231 | ||
7c673cae FG |
1232 | list<CDir*> dfs; |
1233 | dfs.push_back(dir); | |
1234 | while (!dfs.empty()) { | |
1235 | CDir *dir = dfs.front(); | |
1236 | dfs.pop_front(); | |
b32b8144 FG |
1237 | |
1238 | approx_size += frag_size; | |
94b18763 FG |
1239 | for (auto &p : *dir) { |
1240 | CDentry *dn = p.second; | |
b32b8144 FG |
1241 | if (dn->get_linkage()->is_null()) { |
1242 | approx_size += null_size; | |
1243 | continue; | |
1244 | } | |
1245 | if (dn->get_linkage()->is_remote()) { | |
1246 | approx_size += link_size; | |
7c673cae | 1247 | continue; |
b32b8144 FG |
1248 | } |
1249 | ||
1250 | approx_size += inode_size; | |
7c673cae FG |
1251 | CInode *in = dn->get_linkage()->get_inode(); |
1252 | if (in->is_dir()) { | |
1253 | // directory? | |
1254 | list<CDir*> ls; | |
1255 | in->get_dirfrags(ls); | |
b32b8144 FG |
1256 | for (auto q : ls) { |
1257 | if (q->is_subtree_root()) { | |
1258 | q->state_set(CDir::STATE_EXPORTBOUND); | |
1259 | q->get(CDir::PIN_EXPORTBOUND); | |
1260 | } else { | |
7c673cae | 1261 | // include nested dirfrag |
b32b8144 FG |
1262 | assert(q->get_dir_auth().first == CDIR_AUTH_PARENT); |
1263 | dfs.push_front(q); | |
7c673cae FG |
1264 | } |
1265 | } | |
1266 | } | |
1267 | for (map<client_t, Capability*>::iterator q = in->client_caps.begin(); | |
1268 | q != in->client_caps.end(); | |
b32b8144 FG |
1269 | ++q) { |
1270 | approx_size += cap_size; | |
7c673cae | 1271 | client_set.insert(q->first); |
b32b8144 | 1272 | } |
7c673cae | 1273 | } |
b32b8144 FG |
1274 | |
1275 | if (approx_size >= max_size) | |
1276 | break; | |
1277 | } | |
1278 | ||
1279 | while (!dfs.empty()) { | |
1280 | CDir *dir = dfs.front(); | |
1281 | dfs.pop_front(); | |
1282 | ||
1283 | dout(7) << "check_export_size: creating bound " << *dir << dendl; | |
1284 | assert(dir->is_auth()); | |
1285 | dir->state_set(CDir::STATE_EXPORTBOUND); | |
1286 | dir->get(CDir::PIN_EXPORTBOUND); | |
1287 | ||
1288 | mds->mdcache->adjust_subtree_auth(dir, mds->get_nodeid()); | |
1289 | // Another choice here is finishing all WAIT_UNFREEZE contexts and keeping | |
1290 | // the newly created subtree unfreeze. | |
1291 | dir->_freeze_tree(); | |
1292 | ||
1293 | stat.residual_dirs.insert(dir); | |
7c673cae FG |
1294 | } |
1295 | } | |
1296 | ||
1297 | void Migrator::get_export_client_set(CInode *in, set<client_t>& client_set) | |
1298 | { | |
1299 | for (map<client_t, Capability*>::iterator q = in->client_caps.begin(); | |
1300 | q != in->client_caps.end(); | |
1301 | ++q) | |
1302 | client_set.insert(q->first); | |
1303 | } | |
1304 | ||
1305 | /* This function DOES put the passed message before returning*/ | |
1306 | void Migrator::handle_export_prep_ack(MExportDirPrepAck *m) | |
1307 | { | |
1308 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
1309 | mds_rank_t dest(m->get_source().num()); | |
1310 | utime_t now = ceph_clock_now(); | |
1311 | assert(dir); | |
1312 | ||
1313 | dout(7) << "export_prep_ack " << *dir << dendl; | |
1314 | ||
1315 | mds->hit_export_target(now, dest, -1); | |
1316 | ||
1317 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1318 | if (it == export_state.end() || | |
1319 | it->second.tid != m->get_tid() || | |
1320 | it->second.peer != mds_rank_t(m->get_source().num())) { | |
1321 | // export must have aborted. | |
1322 | dout(7) << "export must have aborted" << dendl; | |
1323 | m->put(); | |
1324 | return; | |
1325 | } | |
1326 | assert(it->second.state == EXPORT_PREPPING); | |
1327 | ||
1328 | if (!m->is_success()) { | |
c07f9fc5 | 1329 | dout(7) << "peer couldn't acquire all needed locks or wasn't active, canceling" << dendl; |
7c673cae FG |
1330 | export_try_cancel(dir, false); |
1331 | m->put(); | |
1332 | return; | |
1333 | } | |
1334 | ||
1335 | assert (g_conf->mds_kill_export_at != 5); | |
1336 | // send warnings | |
1337 | set<CDir*> bounds; | |
1338 | cache->get_subtree_bounds(dir, bounds); | |
1339 | ||
1340 | assert(it->second.warning_ack_waiting.empty() || | |
1341 | (it->second.warning_ack_waiting.size() == 1 && | |
1342 | it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0)); | |
1343 | assert(it->second.notify_ack_waiting.empty()); | |
1344 | ||
181888fb FG |
1345 | for (const auto &p : dir->get_replicas()) { |
1346 | if (p.first == it->second.peer) continue; | |
7c673cae | 1347 | if (mds->is_cluster_degraded() && |
181888fb | 1348 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(p.first)) |
7c673cae | 1349 | continue; // only if active |
181888fb FG |
1350 | it->second.warning_ack_waiting.insert(p.first); |
1351 | it->second.notify_ack_waiting.insert(p.first); // we'll eventually get a notifyack, too! | |
7c673cae FG |
1352 | |
1353 | MExportDirNotify *notify = new MExportDirNotify(dir->dirfrag(), it->second.tid, true, | |
1354 | mds_authority_t(mds->get_nodeid(),CDIR_AUTH_UNKNOWN), | |
1355 | mds_authority_t(mds->get_nodeid(),it->second.peer)); | |
1356 | for (set<CDir*>::iterator q = bounds.begin(); q != bounds.end(); ++q) | |
1357 | notify->get_bounds().push_back((*q)->dirfrag()); | |
181888fb | 1358 | mds->send_message_mds(notify, p.first); |
7c673cae FG |
1359 | |
1360 | } | |
1361 | ||
1362 | it->second.state = EXPORT_WARNING; | |
1363 | ||
1364 | assert(g_conf->mds_kill_export_at != 6); | |
1365 | // nobody to warn? | |
1366 | if (it->second.warning_ack_waiting.empty()) | |
1367 | export_go(dir); // start export. | |
1368 | ||
1369 | // done. | |
1370 | m->put(); | |
1371 | } | |
1372 | ||
1373 | ||
1374 | class C_M_ExportGo : public MigratorContext { | |
1375 | CDir *dir; | |
1376 | uint64_t tid; | |
1377 | public: | |
1378 | C_M_ExportGo(Migrator *m, CDir *d, uint64_t t) : | |
1379 | MigratorContext(m), dir(d), tid(t) { | |
1380 | assert(dir != NULL); | |
1381 | } | |
1382 | void finish(int r) override { | |
1383 | mig->export_go_synced(dir, tid); | |
1384 | } | |
1385 | }; | |
1386 | ||
1387 | void Migrator::export_go(CDir *dir) | |
1388 | { | |
b32b8144 FG |
1389 | auto it = export_state.find(dir); |
1390 | assert(it != export_state.end()); | |
1391 | dout(7) << "export_go " << *dir << " to " << it->second.peer << dendl; | |
7c673cae FG |
1392 | |
1393 | // first sync log to flush out e.g. any cap imports | |
b32b8144 | 1394 | mds->mdlog->wait_for_safe(new C_M_ExportGo(this, dir, it->second.tid)); |
7c673cae FG |
1395 | mds->mdlog->flush(); |
1396 | } | |
1397 | ||
1398 | void Migrator::export_go_synced(CDir *dir, uint64_t tid) | |
1399 | { | |
1400 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1401 | if (it == export_state.end() || | |
1402 | it->second.state == EXPORT_CANCELLING || | |
1403 | it->second.tid != tid) { | |
1404 | // export must have aborted. | |
1405 | dout(7) << "export must have aborted on " << dir << dendl; | |
1406 | return; | |
1407 | } | |
1408 | assert(it->second.state == EXPORT_WARNING); | |
1409 | mds_rank_t dest = it->second.peer; | |
1410 | ||
1411 | dout(7) << "export_go_synced " << *dir << " to " << dest << dendl; | |
1412 | ||
1413 | cache->show_subtrees(); | |
1414 | ||
1415 | it->second.state = EXPORT_EXPORTING; | |
1416 | assert(g_conf->mds_kill_export_at != 7); | |
1417 | ||
1418 | assert(dir->is_frozen_tree_root()); | |
1419 | assert(dir->get_cum_auth_pins() == 0); | |
1420 | ||
1421 | // set ambiguous auth | |
1422 | cache->adjust_subtree_auth(dir, mds->get_nodeid(), dest); | |
1423 | ||
1424 | // take away the popularity we're sending. | |
1425 | utime_t now = ceph_clock_now(); | |
1426 | mds->balancer->subtract_export(dir, now); | |
1427 | ||
1428 | // fill export message with cache data | |
1429 | MExportDir *req = new MExportDir(dir->dirfrag(), it->second.tid); | |
1430 | map<client_t,entity_inst_t> exported_client_map; | |
1431 | uint64_t num_exported_inodes = encode_export_dir(req->export_data, | |
1432 | dir, // recur start point | |
1433 | exported_client_map, | |
1434 | now); | |
1435 | ::encode(exported_client_map, req->client_map, | |
1436 | mds->mdsmap->get_up_features()); | |
1437 | ||
1438 | // add bounds to message | |
1439 | set<CDir*> bounds; | |
1440 | cache->get_subtree_bounds(dir, bounds); | |
1441 | for (set<CDir*>::iterator p = bounds.begin(); | |
1442 | p != bounds.end(); | |
1443 | ++p) | |
1444 | req->add_export((*p)->dirfrag()); | |
1445 | ||
1446 | // send | |
1447 | mds->send_message_mds(req, dest); | |
1448 | assert(g_conf->mds_kill_export_at != 8); | |
1449 | ||
1450 | mds->hit_export_target(now, dest, num_exported_inodes+1); | |
1451 | ||
1452 | // stats | |
1453 | if (mds->logger) mds->logger->inc(l_mds_exported); | |
1454 | if (mds->logger) mds->logger->inc(l_mds_exported_inodes, num_exported_inodes); | |
1455 | ||
1456 | cache->show_subtrees(); | |
1457 | } | |
1458 | ||
1459 | ||
1460 | /** encode_export_inode | |
1461 | * update our local state for this inode to export. | |
1462 | * encode relevant state to be sent over the wire. | |
1463 | * used by: encode_export_dir, file_rename (if foreign) | |
1464 | * | |
1465 | * FIXME: the separation between CInode.encode_export and these methods | |
1466 | * is pretty arbitrary and dumb. | |
1467 | */ | |
1468 | void Migrator::encode_export_inode(CInode *in, bufferlist& enc_state, | |
1469 | map<client_t,entity_inst_t>& exported_client_map) | |
1470 | { | |
1471 | dout(7) << "encode_export_inode " << *in << dendl; | |
1472 | assert(!in->is_replica(mds->get_nodeid())); | |
1473 | ||
1474 | // relax locks? | |
1475 | if (!in->is_replicated()) { | |
1476 | in->replicate_relax_locks(); | |
1477 | dout(20) << " did replicate_relax_locks, now " << *in << dendl; | |
1478 | } | |
1479 | ||
1480 | ::encode(in->inode.ino, enc_state); | |
1481 | ::encode(in->last, enc_state); | |
1482 | in->encode_export(enc_state); | |
1483 | ||
1484 | // caps | |
1485 | encode_export_inode_caps(in, true, enc_state, exported_client_map); | |
1486 | } | |
1487 | ||
1488 | void Migrator::encode_export_inode_caps(CInode *in, bool auth_cap, bufferlist& bl, | |
1489 | map<client_t,entity_inst_t>& exported_client_map) | |
1490 | { | |
1491 | dout(20) << "encode_export_inode_caps " << *in << dendl; | |
1492 | ||
1493 | // encode caps | |
1494 | map<client_t,Capability::Export> cap_map; | |
1495 | in->export_client_caps(cap_map); | |
1496 | ::encode(cap_map, bl); | |
1497 | if (auth_cap) { | |
1498 | ::encode(in->get_mds_caps_wanted(), bl); | |
1499 | ||
1500 | in->state_set(CInode::STATE_EXPORTINGCAPS); | |
1501 | in->get(CInode::PIN_EXPORTINGCAPS); | |
1502 | } | |
1503 | ||
1504 | // make note of clients named by exported capabilities | |
1505 | for (map<client_t, Capability*>::iterator it = in->client_caps.begin(); | |
1506 | it != in->client_caps.end(); | |
1507 | ++it) | |
1508 | exported_client_map[it->first] = mds->sessionmap.get_inst(entity_name_t::CLIENT(it->first.v)); | |
1509 | } | |
1510 | ||
1511 | void Migrator::finish_export_inode_caps(CInode *in, mds_rank_t peer, | |
1512 | map<client_t,Capability::Import>& peer_imported) | |
1513 | { | |
1514 | dout(20) << "finish_export_inode_caps " << *in << dendl; | |
1515 | ||
1516 | in->state_clear(CInode::STATE_EXPORTINGCAPS); | |
1517 | in->put(CInode::PIN_EXPORTINGCAPS); | |
1518 | ||
1519 | // tell (all) clients about migrating caps.. | |
1520 | for (map<client_t, Capability*>::iterator it = in->client_caps.begin(); | |
1521 | it != in->client_caps.end(); | |
1522 | ++it) { | |
1523 | Capability *cap = it->second; | |
1524 | dout(7) << "finish_export_inode_caps telling client." << it->first | |
1525 | << " exported caps on " << *in << dendl; | |
1526 | MClientCaps *m = new MClientCaps(CEPH_CAP_OP_EXPORT, in->ino(), 0, | |
1527 | cap->get_cap_id(), cap->get_mseq(), mds->get_osd_epoch_barrier()); | |
1528 | ||
1529 | map<client_t,Capability::Import>::iterator q = peer_imported.find(it->first); | |
1530 | assert(q != peer_imported.end()); | |
28e407b8 AA |
1531 | m->set_cap_peer(q->second.cap_id, q->second.issue_seq, q->second.mseq, |
1532 | (q->second.cap_id > 0 ? peer : -1), 0); | |
7c673cae FG |
1533 | mds->send_message_client_counted(m, it->first); |
1534 | } | |
1535 | in->clear_client_caps_after_export(); | |
1536 | mds->locker->eval(in, CEPH_CAP_LOCKS); | |
1537 | } | |
1538 | ||
1539 | void Migrator::finish_export_inode(CInode *in, utime_t now, mds_rank_t peer, | |
1540 | map<client_t,Capability::Import>& peer_imported, | |
1541 | list<MDSInternalContextBase*>& finished) | |
1542 | { | |
1543 | dout(12) << "finish_export_inode " << *in << dendl; | |
1544 | ||
1545 | // clean | |
1546 | if (in->is_dirty()) | |
1547 | in->mark_clean(); | |
1548 | ||
1549 | // clear/unpin cached_by (we're no longer the authority) | |
1550 | in->clear_replica_map(); | |
1551 | ||
1552 | // twiddle lock states for auth -> replica transition | |
1553 | in->authlock.export_twiddle(); | |
1554 | in->linklock.export_twiddle(); | |
1555 | in->dirfragtreelock.export_twiddle(); | |
1556 | in->filelock.export_twiddle(); | |
1557 | in->nestlock.export_twiddle(); | |
1558 | in->xattrlock.export_twiddle(); | |
1559 | in->snaplock.export_twiddle(); | |
1560 | in->flocklock.export_twiddle(); | |
1561 | in->policylock.export_twiddle(); | |
1562 | ||
1563 | // mark auth | |
1564 | assert(in->is_auth()); | |
1565 | in->state_clear(CInode::STATE_AUTH); | |
1566 | in->replica_nonce = CInode::EXPORT_NONCE; | |
1567 | ||
1568 | in->clear_dirty_rstat(); | |
1569 | ||
1570 | // no more auth subtree? clear scatter dirty | |
1571 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) | |
1572 | in->clear_scatter_dirty(); | |
1573 | ||
1574 | in->item_open_file.remove_myself(); | |
1575 | ||
1576 | in->clear_dirty_parent(); | |
1577 | ||
1578 | in->clear_file_locks(); | |
1579 | ||
1580 | // waiters | |
1581 | in->take_waiting(CInode::WAIT_ANY_MASK, finished); | |
1582 | ||
1583 | in->finish_export(now); | |
1584 | ||
1585 | finish_export_inode_caps(in, peer, peer_imported); | |
7c673cae FG |
1586 | } |
1587 | ||
1588 | uint64_t Migrator::encode_export_dir(bufferlist& exportbl, | |
1589 | CDir *dir, | |
1590 | map<client_t,entity_inst_t>& exported_client_map, | |
1591 | utime_t now) | |
1592 | { | |
1593 | uint64_t num_exported = 0; | |
1594 | ||
1595 | dout(7) << "encode_export_dir " << *dir << " " << dir->get_num_head_items() << " head items" << dendl; | |
1596 | ||
1597 | assert(dir->get_projected_version() == dir->get_version()); | |
1598 | ||
1599 | #ifdef MDS_VERIFY_FRAGSTAT | |
1600 | if (dir->is_complete()) | |
1601 | dir->verify_fragstat(); | |
1602 | #endif | |
1603 | ||
1604 | // dir | |
1605 | dirfrag_t df = dir->dirfrag(); | |
1606 | ::encode(df, exportbl); | |
1607 | dir->encode_export(exportbl); | |
1608 | ||
1609 | __u32 nden = dir->items.size(); | |
1610 | ::encode(nden, exportbl); | |
1611 | ||
1612 | // dentries | |
1613 | list<CDir*> subdirs; | |
94b18763 FG |
1614 | for (auto &p : *dir) { |
1615 | CDentry *dn = p.second; | |
7c673cae FG |
1616 | CInode *in = dn->get_linkage()->get_inode(); |
1617 | ||
1618 | if (!dn->is_replicated()) | |
1619 | dn->lock.replicate_relax(); | |
1620 | ||
1621 | num_exported++; | |
1622 | ||
1623 | // -- dentry | |
1624 | dout(7) << "encode_export_dir exporting " << *dn << dendl; | |
1625 | ||
1626 | // dn name | |
94b18763 | 1627 | ::encode(dn->get_name(), exportbl); |
7c673cae FG |
1628 | ::encode(dn->last, exportbl); |
1629 | ||
1630 | // state | |
1631 | dn->encode_export(exportbl); | |
1632 | ||
1633 | // points to... | |
1634 | ||
1635 | // null dentry? | |
1636 | if (dn->get_linkage()->is_null()) { | |
1637 | exportbl.append("N", 1); // null dentry | |
1638 | continue; | |
1639 | } | |
1640 | ||
1641 | if (dn->get_linkage()->is_remote()) { | |
1642 | // remote link | |
1643 | exportbl.append("L", 1); // remote link | |
1644 | ||
1645 | inodeno_t ino = dn->get_linkage()->get_remote_ino(); | |
1646 | unsigned char d_type = dn->get_linkage()->get_remote_d_type(); | |
1647 | ::encode(ino, exportbl); | |
1648 | ::encode(d_type, exportbl); | |
1649 | continue; | |
1650 | } | |
1651 | ||
1652 | // primary link | |
1653 | // -- inode | |
1654 | exportbl.append("I", 1); // inode dentry | |
1655 | ||
1656 | encode_export_inode(in, exportbl, exported_client_map); // encode, and (update state for) export | |
1657 | ||
1658 | // directory? | |
1659 | list<CDir*> dfs; | |
1660 | in->get_dirfrags(dfs); | |
1661 | for (list<CDir*>::iterator p = dfs.begin(); p != dfs.end(); ++p) { | |
1662 | CDir *t = *p; | |
1663 | if (!t->state_test(CDir::STATE_EXPORTBOUND)) { | |
1664 | // include nested dirfrag | |
1665 | assert(t->get_dir_auth().first == CDIR_AUTH_PARENT); | |
b32b8144 | 1666 | subdirs.push_front(t); // it's ours, recurse (later) |
7c673cae FG |
1667 | } |
1668 | } | |
1669 | } | |
1670 | ||
1671 | // subdirs | |
94b18763 FG |
1672 | for (auto &dir : subdirs) |
1673 | num_exported += encode_export_dir(exportbl, dir, exported_client_map, now); | |
7c673cae FG |
1674 | |
1675 | return num_exported; | |
1676 | } | |
1677 | ||
1678 | void Migrator::finish_export_dir(CDir *dir, utime_t now, mds_rank_t peer, | |
1679 | map<inodeno_t,map<client_t,Capability::Import> >& peer_imported, | |
1680 | list<MDSInternalContextBase*>& finished, int *num_dentries) | |
1681 | { | |
1682 | dout(10) << "finish_export_dir " << *dir << dendl; | |
1683 | ||
1684 | // release open_by | |
1685 | dir->clear_replica_map(); | |
1686 | ||
1687 | // mark | |
1688 | assert(dir->is_auth()); | |
1689 | dir->state_clear(CDir::STATE_AUTH); | |
1690 | dir->remove_bloom(); | |
1691 | dir->replica_nonce = CDir::EXPORT_NONCE; | |
1692 | ||
1693 | if (dir->is_dirty()) | |
1694 | dir->mark_clean(); | |
1695 | ||
1696 | // suck up all waiters | |
1697 | dir->take_waiting(CDir::WAIT_ANY_MASK, finished); // all dir waiters | |
1698 | ||
1699 | // pop | |
1700 | dir->finish_export(now); | |
1701 | ||
1702 | // dentries | |
1703 | list<CDir*> subdirs; | |
94b18763 FG |
1704 | for (auto &p : *dir) { |
1705 | CDentry *dn = p.second; | |
7c673cae FG |
1706 | CInode *in = dn->get_linkage()->get_inode(); |
1707 | ||
1708 | // dentry | |
1709 | dn->finish_export(); | |
1710 | ||
1711 | // inode? | |
1712 | if (dn->get_linkage()->is_primary()) { | |
1713 | finish_export_inode(in, now, peer, peer_imported[in->ino()], finished); | |
1714 | ||
1715 | // subdirs? | |
1716 | in->get_nested_dirfrags(subdirs); | |
1717 | } | |
1718 | ||
1719 | cache->touch_dentry_bottom(dn); // move dentry to tail of LRU | |
1720 | ++(*num_dentries); | |
1721 | } | |
1722 | ||
1723 | // subdirs | |
1724 | for (list<CDir*>::iterator it = subdirs.begin(); it != subdirs.end(); ++it) | |
1725 | finish_export_dir(*it, now, peer, peer_imported, finished, num_dentries); | |
1726 | } | |
1727 | ||
1728 | class C_MDS_ExportFinishLogged : public MigratorLogContext { | |
1729 | CDir *dir; | |
1730 | public: | |
1731 | C_MDS_ExportFinishLogged(Migrator *m, CDir *d) : MigratorLogContext(m), dir(d) {} | |
1732 | void finish(int r) override { | |
1733 | mig->export_logged_finish(dir); | |
1734 | } | |
1735 | }; | |
1736 | ||
1737 | ||
1738 | /* | |
1739 | * i should get an export_ack from the export target. | |
1740 | * | |
1741 | * This function DOES put the passed message before returning | |
1742 | */ | |
1743 | void Migrator::handle_export_ack(MExportDirAck *m) | |
1744 | { | |
1745 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
1746 | mds_rank_t dest(m->get_source().num()); | |
1747 | utime_t now = ceph_clock_now(); | |
1748 | assert(dir); | |
1749 | assert(dir->is_frozen_tree_root()); // i'm exporting! | |
1750 | ||
1751 | // yay! | |
1752 | dout(7) << "handle_export_ack " << *dir << dendl; | |
1753 | ||
1754 | mds->hit_export_target(now, dest, -1); | |
1755 | ||
1756 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1757 | assert(it != export_state.end()); | |
1758 | assert(it->second.state == EXPORT_EXPORTING); | |
1759 | assert(it->second.tid == m->get_tid()); | |
1760 | ||
1761 | bufferlist::iterator bp = m->imported_caps.begin(); | |
1762 | ::decode(it->second.peer_imported, bp); | |
1763 | ||
1764 | it->second.state = EXPORT_LOGGINGFINISH; | |
1765 | assert (g_conf->mds_kill_export_at != 9); | |
1766 | set<CDir*> bounds; | |
1767 | cache->get_subtree_bounds(dir, bounds); | |
1768 | ||
7c673cae FG |
1769 | // log completion. |
1770 | // include export bounds, to ensure they're in the journal. | |
31f18b77 | 1771 | EExport *le = new EExport(mds->mdlog, dir, it->second.peer);; |
7c673cae FG |
1772 | mds->mdlog->start_entry(le); |
1773 | ||
1774 | le->metablob.add_dir_context(dir, EMetaBlob::TO_ROOT); | |
31f18b77 | 1775 | le->metablob.add_dir(dir, false); |
7c673cae FG |
1776 | for (set<CDir*>::iterator p = bounds.begin(); |
1777 | p != bounds.end(); | |
1778 | ++p) { | |
1779 | CDir *bound = *p; | |
1780 | le->get_bounds().insert(bound->dirfrag()); | |
1781 | le->metablob.add_dir_context(bound); | |
1782 | le->metablob.add_dir(bound, false); | |
1783 | } | |
1784 | ||
31f18b77 FG |
1785 | // list us second, them first. |
1786 | // this keeps authority().first in sync with subtree auth state in the journal. | |
1787 | cache->adjust_subtree_auth(dir, it->second.peer, mds->get_nodeid()); | |
1788 | ||
7c673cae FG |
1789 | // log export completion, then finish (unfreeze, trigger finish context, etc.) |
1790 | mds->mdlog->submit_entry(le, new C_MDS_ExportFinishLogged(this, dir)); | |
1791 | mds->mdlog->flush(); | |
1792 | assert (g_conf->mds_kill_export_at != 10); | |
1793 | ||
1794 | m->put(); | |
1795 | } | |
1796 | ||
b32b8144 | 1797 | void Migrator::export_notify_abort(CDir *dir, export_state_t& stat, set<CDir*>& bounds) |
7c673cae FG |
1798 | { |
1799 | dout(7) << "export_notify_abort " << *dir << dendl; | |
1800 | ||
7c673cae FG |
1801 | assert(stat.state == EXPORT_CANCELLING); |
1802 | ||
1803 | if (stat.notify_ack_waiting.empty()) { | |
1804 | stat.state = EXPORT_CANCELLED; | |
1805 | return; | |
1806 | } | |
1807 | ||
1808 | dir->auth_pin(this); | |
1809 | ||
1810 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
1811 | p != stat.notify_ack_waiting.end(); | |
1812 | ++p) { | |
b32b8144 FG |
1813 | MExportDirNotify *notify = new MExportDirNotify(dir->dirfrag(), stat.tid, true, |
1814 | pair<int,int>(mds->get_nodeid(), stat.peer), | |
1815 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
1816 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
1817 | notify->get_bounds().push_back((*i)->dirfrag()); | |
1818 | mds->send_message_mds(notify, *p); | |
1819 | } | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * this happens if hte dest failes after i send teh export data but before it is acked | |
1824 | * that is, we don't know they safely received and logged it, so we reverse our changes | |
1825 | * and go on. | |
1826 | */ | |
b32b8144 | 1827 | void Migrator::export_reverse(CDir *dir, export_state_t& stat) |
7c673cae FG |
1828 | { |
1829 | dout(7) << "export_reverse " << *dir << dendl; | |
1830 | ||
1831 | set<CInode*> to_eval; | |
1832 | ||
1833 | set<CDir*> bounds; | |
1834 | cache->get_subtree_bounds(dir, bounds); | |
1835 | ||
1836 | // remove exporting pins | |
1837 | list<CDir*> rq; | |
1838 | rq.push_back(dir); | |
1839 | while (!rq.empty()) { | |
1840 | CDir *t = rq.front(); | |
1841 | rq.pop_front(); | |
1842 | t->abort_export(); | |
94b18763 FG |
1843 | for (auto &p : *t) { |
1844 | CDentry *dn = p.second; | |
1845 | dn->abort_export(); | |
1846 | if (!dn->get_linkage()->is_primary()) | |
7c673cae | 1847 | continue; |
94b18763 | 1848 | CInode *in = dn->get_linkage()->get_inode(); |
7c673cae FG |
1849 | in->abort_export(); |
1850 | if (in->state_test(CInode::STATE_EVALSTALECAPS)) { | |
1851 | in->state_clear(CInode::STATE_EVALSTALECAPS); | |
1852 | to_eval.insert(in); | |
1853 | } | |
1854 | if (in->is_dir()) | |
1855 | in->get_nested_dirfrags(rq); | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | // unpin bounds | |
b32b8144 | 1860 | for (auto bd : bounds) { |
7c673cae FG |
1861 | bd->put(CDir::PIN_EXPORTBOUND); |
1862 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
1863 | } | |
1864 | ||
7c673cae | 1865 | // notify bystanders |
b32b8144 | 1866 | export_notify_abort(dir, stat, bounds); |
7c673cae | 1867 | |
224ce89b WB |
1868 | // unfreeze tree, with possible subtree merge. |
1869 | cache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); | |
1870 | ||
7c673cae FG |
1871 | // process delayed expires |
1872 | cache->process_delayed_expire(dir); | |
224ce89b | 1873 | |
7c673cae | 1874 | dir->unfreeze_tree(); |
224ce89b | 1875 | cache->try_subtree_merge(dir); |
b32b8144 FG |
1876 | for (auto bd : stat.residual_dirs) { |
1877 | bd->unfreeze_tree(); | |
1878 | cache->try_subtree_merge(bd); | |
1879 | } | |
7c673cae FG |
1880 | |
1881 | // revoke/resume stale caps | |
1882 | for (auto in : to_eval) { | |
1883 | bool need_issue = false; | |
1884 | for (auto& p : in->get_client_caps()) { | |
1885 | Capability *cap = p.second; | |
1886 | if (cap->is_stale()) { | |
1887 | mds->locker->revoke_stale_caps(cap); | |
1888 | } else { | |
1889 | need_issue = true; | |
1890 | } | |
1891 | } | |
1892 | if (need_issue && | |
1893 | (!in->is_auth() || !mds->locker->eval(in, CEPH_CAP_LOCKS))) | |
1894 | mds->locker->issue_caps(in); | |
1895 | } | |
1896 | ||
1897 | cache->show_cache(); | |
1898 | } | |
1899 | ||
1900 | ||
1901 | /* | |
1902 | * once i get the ack, and logged the EExportFinish(true), | |
1903 | * send notifies (if any), otherwise go straight to finish. | |
1904 | * | |
1905 | */ | |
1906 | void Migrator::export_logged_finish(CDir *dir) | |
1907 | { | |
1908 | dout(7) << "export_logged_finish " << *dir << dendl; | |
1909 | ||
1910 | export_state_t& stat = export_state[dir]; | |
1911 | ||
1912 | // send notifies | |
1913 | set<CDir*> bounds; | |
1914 | cache->get_subtree_bounds(dir, bounds); | |
1915 | ||
1916 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
1917 | p != stat.notify_ack_waiting.end(); | |
1918 | ++p) { | |
1919 | MExportDirNotify *notify = new MExportDirNotify(dir->dirfrag(), stat.tid, true, | |
1920 | pair<int,int>(mds->get_nodeid(), stat.peer), | |
1921 | pair<int,int>(stat.peer, CDIR_AUTH_UNKNOWN)); | |
1922 | ||
1923 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) | |
1924 | notify->get_bounds().push_back((*i)->dirfrag()); | |
1925 | ||
1926 | mds->send_message_mds(notify, *p); | |
1927 | } | |
1928 | ||
1929 | // wait for notifyacks | |
1930 | stat.state = EXPORT_NOTIFYING; | |
1931 | assert (g_conf->mds_kill_export_at != 11); | |
1932 | ||
1933 | // no notifies to wait for? | |
1934 | if (stat.notify_ack_waiting.empty()) { | |
1935 | export_finish(dir); // skip notify/notify_ack stage. | |
1936 | } else { | |
1937 | // notify peer to send cap import messages to clients | |
1938 | if (!mds->is_cluster_degraded() || | |
1939 | mds->mdsmap->is_clientreplay_or_active_or_stopping(stat.peer)) { | |
1940 | mds->send_message_mds(new MExportDirFinish(dir->dirfrag(), false, stat.tid), stat.peer); | |
1941 | } else { | |
1942 | dout(7) << "not sending MExportDirFinish, dest has failed" << dendl; | |
1943 | } | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | /* | |
1948 | * warning: | |
1949 | * i'll get an ack from each bystander. | |
1950 | * when i get them all, do the export. | |
1951 | * notify: | |
1952 | * i'll get an ack from each bystander. | |
1953 | * when i get them all, unfreeze and send the finish. | |
1954 | * | |
1955 | * This function DOES put the passed message before returning | |
1956 | */ | |
1957 | void Migrator::handle_export_notify_ack(MExportDirNotifyAck *m) | |
1958 | { | |
1959 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
1960 | mds_rank_t dest(m->get_source().num()); | |
1961 | utime_t now = ceph_clock_now(); | |
1962 | assert(dir); | |
1963 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
1964 | ||
1965 | mds->hit_export_target(now, dest, -1); | |
1966 | ||
1967 | auto export_state_entry = export_state.find(dir); | |
1968 | if (export_state_entry != export_state.end()) { | |
1969 | export_state_t& stat = export_state_entry->second; | |
1970 | if (stat.state == EXPORT_WARNING && | |
1971 | stat.warning_ack_waiting.erase(from)) { | |
1972 | // exporting. process warning. | |
1973 | dout(7) << "handle_export_notify_ack from " << m->get_source() | |
1974 | << ": exporting, processing warning on " << *dir << dendl; | |
1975 | if (stat.warning_ack_waiting.empty()) | |
1976 | export_go(dir); // start export. | |
1977 | } else if (stat.state == EXPORT_NOTIFYING && | |
1978 | stat.notify_ack_waiting.erase(from)) { | |
1979 | // exporting. process notify. | |
1980 | dout(7) << "handle_export_notify_ack from " << m->get_source() | |
1981 | << ": exporting, processing notify on " << *dir << dendl; | |
1982 | if (stat.notify_ack_waiting.empty()) | |
1983 | export_finish(dir); | |
1984 | } else if (stat.state == EXPORT_CANCELLING && | |
1985 | m->get_new_auth().second == CDIR_AUTH_UNKNOWN && // not warning ack | |
1986 | stat.notify_ack_waiting.erase(from)) { | |
1987 | dout(7) << "handle_export_notify_ack from " << m->get_source() | |
1988 | << ": cancelling export, processing notify on " << *dir << dendl; | |
1989 | if (stat.notify_ack_waiting.empty()) { | |
1990 | export_state.erase(export_state_entry); | |
1991 | export_cancel_finish(dir); | |
1992 | } | |
1993 | } | |
1994 | } | |
1995 | else { | |
1996 | auto import_state_entry = import_state.find(dir->dirfrag()); | |
1997 | if (import_state_entry != import_state.end()) { | |
1998 | import_state_t& stat = import_state_entry->second; | |
1999 | if (stat.state == IMPORT_ABORTING) { | |
2000 | // reversing import | |
2001 | dout(7) << "handle_export_notify_ack from " << m->get_source() | |
2002 | << ": aborting import on " << *dir << dendl; | |
2003 | assert(stat.bystanders.count(from)); | |
2004 | stat.bystanders.erase(from); | |
2005 | if (stat.bystanders.empty()) | |
2006 | import_reverse_unfreeze(dir); | |
2007 | } | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | m->put(); | |
2012 | } | |
2013 | ||
2014 | void Migrator::export_finish(CDir *dir) | |
2015 | { | |
2016 | dout(5) << "export_finish " << *dir << dendl; | |
2017 | ||
2018 | assert (g_conf->mds_kill_export_at != 12); | |
2019 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
2020 | if (it == export_state.end()) { | |
2021 | dout(7) << "target must have failed, not sending final commit message. export succeeded anyway." << dendl; | |
2022 | return; | |
2023 | } | |
2024 | ||
2025 | // send finish/commit to new auth | |
2026 | if (!mds->is_cluster_degraded() || | |
2027 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer)) { | |
2028 | mds->send_message_mds(new MExportDirFinish(dir->dirfrag(), true, it->second.tid), it->second.peer); | |
2029 | } else { | |
2030 | dout(7) << "not sending MExportDirFinish last, dest has failed" << dendl; | |
2031 | } | |
2032 | assert(g_conf->mds_kill_export_at != 13); | |
2033 | ||
2034 | // finish export (adjust local cache state) | |
2035 | int num_dentries = 0; | |
224ce89b | 2036 | list<MDSInternalContextBase*> finished; |
7c673cae | 2037 | finish_export_dir(dir, ceph_clock_now(), it->second.peer, |
224ce89b WB |
2038 | it->second.peer_imported, finished, &num_dentries); |
2039 | ||
2040 | assert(!dir->is_auth()); | |
2041 | cache->adjust_subtree_auth(dir, it->second.peer); | |
2042 | ||
7c673cae FG |
2043 | // unpin bounds |
2044 | set<CDir*> bounds; | |
2045 | cache->get_subtree_bounds(dir, bounds); | |
2046 | for (set<CDir*>::iterator p = bounds.begin(); | |
2047 | p != bounds.end(); | |
2048 | ++p) { | |
2049 | CDir *bd = *p; | |
2050 | bd->put(CDir::PIN_EXPORTBOUND); | |
2051 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
2052 | } | |
2053 | ||
2054 | if (dir->state_test(CDir::STATE_AUXSUBTREE)) | |
2055 | dir->state_clear(CDir::STATE_AUXSUBTREE); | |
2056 | ||
224ce89b WB |
2057 | // discard delayed expires |
2058 | cache->discard_delayed_expire(dir); | |
2059 | ||
2060 | dout(7) << "export_finish unfreezing" << dendl; | |
2061 | ||
2062 | // unfreeze tree, with possible subtree merge. | |
7c673cae | 2063 | // (we do this _after_ removing EXPORTBOUND pins, to allow merges) |
224ce89b | 2064 | dir->unfreeze_tree(); |
7c673cae | 2065 | cache->try_subtree_merge(dir); |
b32b8144 FG |
2066 | for (auto bd : it->second.residual_dirs) { |
2067 | export_queue.push_front(pair<dirfrag_t,mds_rank_t>(bd->dirfrag(), it->second.peer)); | |
2068 | bd->take_waiting(CDir::WAIT_ANY_MASK, finished); | |
2069 | bd->unfreeze_tree(); | |
2070 | cache->try_subtree_merge(bd); | |
2071 | } | |
7c673cae FG |
2072 | |
2073 | // no more auth subtree? clear scatter dirty | |
2074 | if (!dir->get_inode()->is_auth() && | |
2075 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2076 | dir->get_inode()->clear_scatter_dirty(); | |
2077 | // wake up scatter_nudge waiters | |
224ce89b | 2078 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, finished); |
7c673cae FG |
2079 | } |
2080 | ||
224ce89b WB |
2081 | if (!finished.empty()) |
2082 | mds->queue_waiters(finished); | |
7c673cae FG |
2083 | |
2084 | MutationRef mut = it->second.mut; | |
2085 | // remove from exporting list, clean up state | |
2086 | export_state.erase(it); | |
1adf2230 | 2087 | dir->clear_exporting(); |
7c673cae FG |
2088 | |
2089 | cache->show_subtrees(); | |
2090 | audit(); | |
2091 | ||
181888fb | 2092 | cache->trim(num_dentries); // try trimming exported dentries |
7c673cae FG |
2093 | |
2094 | // send pending import_maps? | |
2095 | mds->mdcache->maybe_send_pending_resolves(); | |
2096 | ||
2097 | // drop locks, unpin path | |
2098 | if (mut) { | |
2099 | mds->locker->drop_locks(mut.get()); | |
2100 | mut->cleanup(); | |
2101 | } | |
2102 | ||
2103 | maybe_do_queued_export(); | |
2104 | } | |
2105 | ||
2106 | ||
2107 | ||
2108 | ||
2109 | ||
2110 | ||
2111 | ||
2112 | ||
2113 | // ========================================================== | |
2114 | // IMPORT | |
2115 | ||
2116 | void Migrator::handle_export_discover(MExportDirDiscover *m) | |
2117 | { | |
2118 | mds_rank_t from = m->get_source_mds(); | |
2119 | assert(from != mds->get_nodeid()); | |
2120 | ||
2121 | dout(7) << "handle_export_discover on " << m->get_path() << dendl; | |
2122 | ||
2123 | // note import state | |
2124 | dirfrag_t df = m->get_dirfrag(); | |
c07f9fc5 FG |
2125 | |
2126 | if (!mds->is_active()) { | |
2127 | dout(7) << " not active, send NACK " << dendl; | |
2128 | mds->send_message_mds(new MExportDirDiscoverAck(df, m->get_tid(), false), from); | |
2129 | m->put(); | |
2130 | return; | |
2131 | } | |
2132 | ||
7c673cae | 2133 | // only start discovering on this message once. |
b32b8144 | 2134 | import_state_t *p_state; |
7c673cae FG |
2135 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); |
2136 | if (!m->started) { | |
2137 | assert(it == import_state.end()); | |
2138 | m->started = true; | |
b32b8144 FG |
2139 | p_state = &import_state[df]; |
2140 | p_state->state = IMPORT_DISCOVERING; | |
2141 | p_state->peer = from; | |
2142 | p_state->tid = m->get_tid(); | |
7c673cae FG |
2143 | } else { |
2144 | // am i retrying after ancient path_traverse results? | |
2145 | if (it == import_state.end() || | |
2146 | it->second.peer != from || | |
2147 | it->second.tid != m->get_tid()) { | |
2148 | dout(7) << " dropping obsolete message" << dendl; | |
2149 | m->put(); | |
2150 | return; | |
2151 | } | |
2152 | assert(it->second.state == IMPORT_DISCOVERING); | |
b32b8144 | 2153 | p_state = &it->second; |
7c673cae FG |
2154 | } |
2155 | ||
2156 | if (!mds->mdcache->is_open()) { | |
2157 | dout(5) << " waiting for root" << dendl; | |
2158 | mds->mdcache->wait_for_open(new C_MDS_RetryMessage(mds, m)); | |
2159 | return; | |
2160 | } | |
2161 | ||
2162 | assert (g_conf->mds_kill_import_at != 1); | |
2163 | ||
2164 | // do we have it? | |
2165 | CInode *in = cache->get_inode(m->get_dirfrag().ino); | |
2166 | if (!in) { | |
2167 | // must discover it! | |
2168 | filepath fpath(m->get_path()); | |
2169 | vector<CDentry*> trace; | |
2170 | MDRequestRef null_ref; | |
2171 | int r = cache->path_traverse(null_ref, m, NULL, fpath, &trace, NULL, MDS_TRAVERSE_DISCOVER); | |
2172 | if (r > 0) return; | |
2173 | if (r < 0) { | |
2174 | dout(7) << "handle_export_discover_2 failed to discover or not dir " << m->get_path() << ", NAK" << dendl; | |
2175 | ceph_abort(); // this shouldn't happen if the auth pins its path properly!!!! | |
2176 | } | |
2177 | ||
2178 | ceph_abort(); // this shouldn't happen; the get_inode above would have succeeded. | |
2179 | } | |
2180 | ||
2181 | // yay | |
2182 | dout(7) << "handle_export_discover have " << df << " inode " << *in << dendl; | |
2183 | ||
b32b8144 | 2184 | p_state->state = IMPORT_DISCOVERED; |
7c673cae FG |
2185 | |
2186 | // pin inode in the cache (for now) | |
2187 | assert(in->is_dir()); | |
2188 | in->get(CInode::PIN_IMPORTING); | |
2189 | ||
2190 | // reply | |
2191 | dout(7) << " sending export_discover_ack on " << *in << dendl; | |
b32b8144 | 2192 | mds->send_message_mds(new MExportDirDiscoverAck(df, m->get_tid()), p_state->peer); |
7c673cae FG |
2193 | m->put(); |
2194 | assert (g_conf->mds_kill_import_at != 2); | |
2195 | } | |
2196 | ||
2197 | void Migrator::import_reverse_discovering(dirfrag_t df) | |
2198 | { | |
2199 | import_state.erase(df); | |
2200 | } | |
2201 | ||
2202 | void Migrator::import_reverse_discovered(dirfrag_t df, CInode *diri) | |
2203 | { | |
2204 | // unpin base | |
2205 | diri->put(CInode::PIN_IMPORTING); | |
2206 | import_state.erase(df); | |
2207 | } | |
2208 | ||
b32b8144 | 2209 | void Migrator::import_reverse_prepping(CDir *dir, import_state_t& stat) |
7c673cae FG |
2210 | { |
2211 | set<CDir*> bounds; | |
b32b8144 | 2212 | cache->map_dirfrag_set(stat.bound_ls, bounds); |
7c673cae FG |
2213 | import_remove_pins(dir, bounds); |
2214 | import_reverse_final(dir); | |
2215 | } | |
2216 | ||
2217 | /* This function DOES put the passed message before returning*/ | |
2218 | void Migrator::handle_export_cancel(MExportDirCancel *m) | |
2219 | { | |
2220 | dout(7) << "handle_export_cancel on " << m->get_dirfrag() << dendl; | |
2221 | dirfrag_t df = m->get_dirfrag(); | |
2222 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); | |
2223 | if (it == import_state.end()) { | |
2224 | assert(0 == "got export_cancel in weird state"); | |
2225 | } else if (it->second.state == IMPORT_DISCOVERING) { | |
2226 | import_reverse_discovering(df); | |
2227 | } else if (it->second.state == IMPORT_DISCOVERED) { | |
2228 | CInode *in = cache->get_inode(df.ino); | |
2229 | assert(in); | |
2230 | import_reverse_discovered(df, in); | |
2231 | } else if (it->second.state == IMPORT_PREPPING) { | |
2232 | CDir *dir = mds->mdcache->get_dirfrag(df); | |
2233 | assert(dir); | |
b32b8144 | 2234 | import_reverse_prepping(dir, it->second); |
7c673cae FG |
2235 | } else if (it->second.state == IMPORT_PREPPED) { |
2236 | CDir *dir = mds->mdcache->get_dirfrag(df); | |
2237 | assert(dir); | |
2238 | set<CDir*> bounds; | |
2239 | cache->get_subtree_bounds(dir, bounds); | |
2240 | import_remove_pins(dir, bounds); | |
2241 | // adjust auth back to the exportor | |
2242 | cache->adjust_subtree_auth(dir, it->second.peer); | |
7c673cae FG |
2243 | import_reverse_unfreeze(dir); |
2244 | } else { | |
2245 | assert(0 == "got export_cancel in weird state"); | |
2246 | } | |
2247 | m->put(); | |
2248 | } | |
2249 | ||
2250 | /* This function DOES put the passed message before returning*/ | |
2251 | void Migrator::handle_export_prep(MExportDirPrep *m) | |
2252 | { | |
2253 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
2254 | assert(oldauth != mds->get_nodeid()); | |
2255 | ||
2256 | CDir *dir; | |
2257 | CInode *diri; | |
2258 | list<MDSInternalContextBase*> finished; | |
2259 | ||
2260 | // assimilate root dir. | |
2261 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
2262 | if (!m->did_assim()) { | |
2263 | assert(it != import_state.end()); | |
2264 | assert(it->second.state == IMPORT_DISCOVERED); | |
31f18b77 | 2265 | assert(it->second.peer == oldauth); |
7c673cae FG |
2266 | diri = cache->get_inode(m->get_dirfrag().ino); |
2267 | assert(diri); | |
2268 | bufferlist::iterator p = m->basedir.begin(); | |
2269 | dir = cache->add_replica_dir(p, diri, oldauth, finished); | |
2270 | dout(7) << "handle_export_prep on " << *dir << " (first pass)" << dendl; | |
2271 | } else { | |
2272 | if (it == import_state.end() || | |
2273 | it->second.peer != oldauth || | |
2274 | it->second.tid != m->get_tid()) { | |
2275 | dout(7) << "handle_export_prep obsolete message, dropping" << dendl; | |
2276 | m->put(); | |
2277 | return; | |
2278 | } | |
2279 | assert(it->second.state == IMPORT_PREPPING); | |
31f18b77 | 2280 | assert(it->second.peer == oldauth); |
7c673cae FG |
2281 | |
2282 | dir = cache->get_dirfrag(m->get_dirfrag()); | |
2283 | assert(dir); | |
2284 | dout(7) << "handle_export_prep on " << *dir << " (subsequent pass)" << dendl; | |
2285 | diri = dir->get_inode(); | |
2286 | } | |
2287 | assert(dir->is_auth() == false); | |
2288 | ||
2289 | cache->show_subtrees(); | |
2290 | ||
2291 | // build import bound map | |
2292 | map<inodeno_t, fragset_t> import_bound_fragset; | |
2293 | for (list<dirfrag_t>::iterator p = m->get_bounds().begin(); | |
2294 | p != m->get_bounds().end(); | |
2295 | ++p) { | |
2296 | dout(10) << " bound " << *p << dendl; | |
2297 | import_bound_fragset[p->ino].insert(p->frag); | |
2298 | } | |
2299 | ||
2300 | // assimilate contents? | |
2301 | if (!m->did_assim()) { | |
2302 | dout(7) << "doing assim on " << *dir << dendl; | |
2303 | m->mark_assim(); // only do this the first time! | |
2304 | ||
2305 | // change import state | |
2306 | it->second.state = IMPORT_PREPPING; | |
2307 | it->second.bound_ls = m->get_bounds(); | |
2308 | it->second.bystanders = m->get_bystanders(); | |
2309 | assert(g_conf->mds_kill_import_at != 3); | |
2310 | ||
2311 | // bystander list | |
2312 | dout(7) << "bystanders are " << it->second.bystanders << dendl; | |
2313 | ||
2314 | // move pin to dir | |
2315 | diri->put(CInode::PIN_IMPORTING); | |
2316 | dir->get(CDir::PIN_IMPORTING); | |
2317 | dir->state_set(CDir::STATE_IMPORTING); | |
2318 | ||
2319 | // assimilate traces to exports | |
2320 | // each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
2321 | for (list<bufferlist>::iterator p = m->traces.begin(); | |
2322 | p != m->traces.end(); | |
2323 | ++p) { | |
2324 | bufferlist::iterator q = p->begin(); | |
2325 | dirfrag_t df; | |
2326 | ::decode(df, q); | |
2327 | char start; | |
2328 | ::decode(start, q); | |
2329 | dout(10) << " trace from " << df << " start " << start << " len " << p->length() << dendl; | |
2330 | ||
2331 | CDir *cur = 0; | |
2332 | if (start == 'd') { | |
2333 | cur = cache->get_dirfrag(df); | |
2334 | assert(cur); | |
2335 | dout(10) << " had " << *cur << dendl; | |
2336 | } else if (start == 'f') { | |
2337 | CInode *in = cache->get_inode(df.ino); | |
2338 | assert(in); | |
2339 | dout(10) << " had " << *in << dendl; | |
2340 | cur = cache->add_replica_dir(q, in, oldauth, finished); | |
2341 | dout(10) << " added " << *cur << dendl; | |
2342 | } else if (start == '-') { | |
2343 | // nothing | |
2344 | } else | |
2345 | assert(0 == "unrecognized start char"); | |
2346 | ||
b32b8144 | 2347 | while (!q.end()) { |
7c673cae FG |
2348 | CDentry *dn = cache->add_replica_dentry(q, cur, finished); |
2349 | dout(10) << " added " << *dn << dendl; | |
2350 | CInode *in = cache->add_replica_inode(q, dn, finished); | |
2351 | dout(10) << " added " << *in << dendl; | |
2352 | if (q.end()) | |
2353 | break; | |
2354 | cur = cache->add_replica_dir(q, in, oldauth, finished); | |
2355 | dout(10) << " added " << *cur << dendl; | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | // make bound sticky | |
2360 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2361 | p != import_bound_fragset.end(); | |
2362 | ++p) { | |
2363 | CInode *in = cache->get_inode(p->first); | |
2364 | assert(in); | |
2365 | in->get_stickydirs(); | |
2366 | dout(7) << " set stickydirs on bound inode " << *in << dendl; | |
2367 | } | |
2368 | ||
2369 | } else { | |
2370 | dout(7) << " not doing assim on " << *dir << dendl; | |
2371 | } | |
2372 | ||
2373 | if (!finished.empty()) | |
2374 | mds->queue_waiters(finished); | |
2375 | ||
2376 | ||
c07f9fc5 FG |
2377 | bool success = true; |
2378 | if (mds->is_active()) { | |
2379 | // open all bounds | |
2380 | set<CDir*> import_bounds; | |
2381 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2382 | p != import_bound_fragset.end(); | |
2383 | ++p) { | |
2384 | CInode *in = cache->get_inode(p->first); | |
2385 | assert(in); | |
7c673cae | 2386 | |
c07f9fc5 FG |
2387 | // map fragset into a frag_t list, based on the inode fragtree |
2388 | list<frag_t> fglist; | |
2389 | for (set<frag_t>::iterator q = p->second.begin(); q != p->second.end(); ++q) | |
2390 | in->dirfragtree.get_leaves_under(*q, fglist); | |
2391 | dout(10) << " bound inode " << p->first << " fragset " << p->second << " maps to " << fglist << dendl; | |
2392 | ||
2393 | for (list<frag_t>::iterator q = fglist.begin(); | |
2394 | q != fglist.end(); | |
2395 | ++q) { | |
2396 | CDir *bound = cache->get_dirfrag(dirfrag_t(p->first, *q)); | |
2397 | if (!bound) { | |
2398 | dout(7) << " opening bounding dirfrag " << *q << " on " << *in << dendl; | |
2399 | cache->open_remote_dirfrag(in, *q, | |
2400 | new C_MDS_RetryMessage(mds, m)); | |
2401 | return; | |
2402 | } | |
7c673cae | 2403 | |
c07f9fc5 FG |
2404 | if (!bound->state_test(CDir::STATE_IMPORTBOUND)) { |
2405 | dout(7) << " pinning import bound " << *bound << dendl; | |
2406 | bound->get(CDir::PIN_IMPORTBOUND); | |
2407 | bound->state_set(CDir::STATE_IMPORTBOUND); | |
2408 | } else { | |
2409 | dout(7) << " already pinned import bound " << *bound << dendl; | |
2410 | } | |
2411 | import_bounds.insert(bound); | |
7c673cae | 2412 | } |
7c673cae | 2413 | } |
7c673cae | 2414 | |
c07f9fc5 FG |
2415 | dout(7) << " all ready, noting auth and freezing import region" << dendl; |
2416 | ||
2417 | if (!mds->mdcache->is_readonly() && | |
2418 | dir->get_inode()->filelock.can_wrlock(-1) && | |
2419 | dir->get_inode()->nestlock.can_wrlock(-1)) { | |
2420 | it->second.mut = new MutationImpl(); | |
2421 | // force some locks. hacky. | |
2422 | mds->locker->wrlock_force(&dir->inode->filelock, it->second.mut); | |
2423 | mds->locker->wrlock_force(&dir->inode->nestlock, it->second.mut); | |
2424 | ||
2425 | // note that i am an ambiguous auth for this subtree. | |
2426 | // specify bounds, since the exporter explicitly defines the region. | |
2427 | cache->adjust_bounded_subtree_auth(dir, import_bounds, | |
2428 | pair<int,int>(oldauth, mds->get_nodeid())); | |
2429 | cache->verify_subtree_bounds(dir, import_bounds); | |
2430 | // freeze. | |
2431 | dir->_freeze_tree(); | |
2432 | // note new state | |
2433 | it->second.state = IMPORT_PREPPED; | |
2434 | } else { | |
2435 | dout(7) << " couldn't acquire all needed locks, failing. " << *dir << dendl; | |
2436 | success = false; | |
2437 | } | |
7c673cae | 2438 | } else { |
c07f9fc5 | 2439 | dout(7) << " not active, failing. " << *dir << dendl; |
7c673cae | 2440 | success = false; |
7c673cae FG |
2441 | } |
2442 | ||
c07f9fc5 | 2443 | if (!success) |
b32b8144 | 2444 | import_reverse_prepping(dir, it->second); |
c07f9fc5 | 2445 | |
7c673cae FG |
2446 | // ok! |
2447 | dout(7) << " sending export_prep_ack on " << *dir << dendl; | |
2448 | mds->send_message(new MExportDirPrepAck(dir->dirfrag(), success, m->get_tid()), m->get_connection()); | |
2449 | ||
2450 | assert(g_conf->mds_kill_import_at != 4); | |
2451 | // done | |
2452 | m->put(); | |
2453 | } | |
2454 | ||
2455 | ||
2456 | ||
2457 | ||
2458 | class C_MDS_ImportDirLoggedStart : public MigratorLogContext { | |
2459 | dirfrag_t df; | |
2460 | CDir *dir; | |
2461 | mds_rank_t from; | |
2462 | public: | |
28e407b8 | 2463 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae FG |
2464 | |
2465 | C_MDS_ImportDirLoggedStart(Migrator *m, CDir *d, mds_rank_t f) : | |
2466 | MigratorLogContext(m), df(d->dirfrag()), dir(d), from(f) { | |
2467 | } | |
2468 | void finish(int r) override { | |
28e407b8 | 2469 | mig->import_logged_start(df, dir, from, imported_session_map); |
7c673cae FG |
2470 | } |
2471 | }; | |
2472 | ||
2473 | /* This function DOES put the passed message before returning*/ | |
2474 | void Migrator::handle_export_dir(MExportDir *m) | |
2475 | { | |
2476 | assert (g_conf->mds_kill_import_at != 5); | |
2477 | CDir *dir = cache->get_dirfrag(m->dirfrag); | |
2478 | assert(dir); | |
31f18b77 FG |
2479 | |
2480 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
2481 | dout(7) << "handle_export_dir importing " << *dir << " from " << oldauth << dendl; | |
2482 | ||
2483 | assert(!dir->is_auth()); | |
7c673cae FG |
2484 | |
2485 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->dirfrag); | |
2486 | assert(it != import_state.end()); | |
2487 | assert(it->second.state == IMPORT_PREPPED); | |
2488 | assert(it->second.tid == m->get_tid()); | |
31f18b77 | 2489 | assert(it->second.peer == oldauth); |
7c673cae FG |
2490 | |
2491 | utime_t now = ceph_clock_now(); | |
7c673cae FG |
2492 | |
2493 | if (!dir->get_inode()->dirfragtree.is_leaf(dir->get_frag())) | |
2494 | dir->get_inode()->dirfragtree.force_to_leaf(g_ceph_context, dir->get_frag()); | |
2495 | ||
2496 | cache->show_subtrees(); | |
2497 | ||
31f18b77 | 2498 | C_MDS_ImportDirLoggedStart *onlogged = new C_MDS_ImportDirLoggedStart(this, dir, oldauth); |
7c673cae FG |
2499 | |
2500 | // start the journal entry | |
31f18b77 | 2501 | EImportStart *le = new EImportStart(mds->mdlog, dir->dirfrag(), m->bounds, oldauth); |
7c673cae FG |
2502 | mds->mdlog->start_entry(le); |
2503 | ||
2504 | le->metablob.add_dir_context(dir); | |
2505 | ||
2506 | // adjust auth (list us _first_) | |
2507 | cache->adjust_subtree_auth(dir, mds->get_nodeid(), oldauth); | |
2508 | ||
2509 | // new client sessions, open these after we journal | |
2510 | // include imported sessions in EImportStart | |
2511 | bufferlist::iterator cmp = m->client_map.begin(); | |
28e407b8 AA |
2512 | map<client_t,entity_inst_t> client_map; |
2513 | decode(client_map, cmp); | |
7c673cae | 2514 | assert(cmp.end()); |
28e407b8 AA |
2515 | le->cmapv = mds->server->prepare_force_open_sessions(client_map, onlogged->imported_session_map); |
2516 | encode(client_map, le->client_map, mds->mdsmap->get_up_features()); | |
7c673cae FG |
2517 | |
2518 | bufferlist::iterator blp = m->export_data.begin(); | |
2519 | int num_imported_inodes = 0; | |
2520 | while (!blp.end()) { | |
2521 | num_imported_inodes += | |
2522 | decode_import_dir(blp, | |
2523 | oldauth, | |
2524 | dir, // import root | |
2525 | le, | |
2526 | mds->mdlog->get_current_segment(), | |
2527 | it->second.peer_exports, | |
2528 | it->second.updated_scatterlocks, | |
2529 | now); | |
2530 | } | |
2531 | dout(10) << " " << m->bounds.size() << " imported bounds" << dendl; | |
2532 | ||
2533 | // include bounds in EImportStart | |
2534 | set<CDir*> import_bounds; | |
2535 | for (vector<dirfrag_t>::iterator p = m->bounds.begin(); | |
2536 | p != m->bounds.end(); | |
2537 | ++p) { | |
2538 | CDir *bd = cache->get_dirfrag(*p); | |
2539 | assert(bd); | |
2540 | le->metablob.add_dir(bd, false); // note that parent metadata is already in the event | |
2541 | import_bounds.insert(bd); | |
2542 | } | |
2543 | cache->verify_subtree_bounds(dir, import_bounds); | |
2544 | ||
2545 | // adjust popularity | |
2546 | mds->balancer->add_import(dir, now); | |
2547 | ||
2548 | dout(7) << "handle_export_dir did " << *dir << dendl; | |
2549 | ||
2550 | // note state | |
2551 | it->second.state = IMPORT_LOGGINGSTART; | |
2552 | assert (g_conf->mds_kill_import_at != 6); | |
2553 | ||
2554 | // log it | |
2555 | mds->mdlog->submit_entry(le, onlogged); | |
2556 | mds->mdlog->flush(); | |
2557 | ||
2558 | // some stats | |
2559 | if (mds->logger) { | |
2560 | mds->logger->inc(l_mds_imported); | |
2561 | mds->logger->inc(l_mds_imported_inodes, num_imported_inodes); | |
2562 | } | |
2563 | ||
2564 | m->put(); | |
2565 | } | |
2566 | ||
2567 | ||
2568 | /* | |
2569 | * this is an import helper | |
2570 | * called by import_finish, and import_reverse and friends. | |
2571 | */ | |
2572 | void Migrator::import_remove_pins(CDir *dir, set<CDir*>& bounds) | |
2573 | { | |
2574 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2575 | // root | |
2576 | dir->put(CDir::PIN_IMPORTING); | |
2577 | dir->state_clear(CDir::STATE_IMPORTING); | |
2578 | ||
2579 | // bounding inodes | |
2580 | set<inodeno_t> did; | |
2581 | for (list<dirfrag_t>::iterator p = stat.bound_ls.begin(); | |
2582 | p != stat.bound_ls.end(); | |
2583 | ++p) { | |
2584 | if (did.count(p->ino)) | |
2585 | continue; | |
2586 | did.insert(p->ino); | |
2587 | CInode *in = cache->get_inode(p->ino); | |
2588 | assert(in); | |
2589 | in->put_stickydirs(); | |
2590 | } | |
2591 | ||
2592 | if (stat.state == IMPORT_PREPPING) { | |
2593 | for (auto bd : bounds) { | |
2594 | if (bd->state_test(CDir::STATE_IMPORTBOUND)) { | |
2595 | bd->put(CDir::PIN_IMPORTBOUND); | |
2596 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2597 | } | |
2598 | } | |
2599 | } else if (stat.state >= IMPORT_PREPPED) { | |
2600 | // bounding dirfrags | |
2601 | for (auto bd : bounds) { | |
2602 | assert(bd->state_test(CDir::STATE_IMPORTBOUND)); | |
2603 | bd->put(CDir::PIN_IMPORTBOUND); | |
2604 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2605 | } | |
2606 | } | |
2607 | } | |
2608 | ||
2609 | ||
2610 | /* | |
2611 | * note: this does teh full work of reversing and import and cleaning up | |
2612 | * state. | |
2613 | * called by both handle_mds_failure and by handle_resolve (if we are | |
2614 | * a survivor coping with an exporter failure+recovery). | |
2615 | */ | |
2616 | void Migrator::import_reverse(CDir *dir) | |
2617 | { | |
2618 | dout(7) << "import_reverse " << *dir << dendl; | |
2619 | ||
2620 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2621 | stat.state = IMPORT_ABORTING; | |
2622 | ||
2623 | set<CDir*> bounds; | |
2624 | cache->get_subtree_bounds(dir, bounds); | |
2625 | ||
2626 | // remove pins | |
2627 | import_remove_pins(dir, bounds); | |
2628 | ||
2629 | // update auth, with possible subtree merge. | |
2630 | assert(dir->is_subtree_root()); | |
2631 | if (mds->is_resolve()) | |
2632 | cache->trim_non_auth_subtree(dir); | |
2633 | ||
2634 | cache->adjust_subtree_auth(dir, stat.peer); | |
2635 | ||
2636 | C_ContextsBase<MDSInternalContextBase, MDSInternalContextGather> *fin = new C_ContextsBase<MDSInternalContextBase, MDSInternalContextGather>(g_ceph_context); | |
2637 | if (!dir->get_inode()->is_auth() && | |
2638 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2639 | dir->get_inode()->clear_scatter_dirty(); | |
2640 | // wake up scatter_nudge waiters | |
2641 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2642 | } | |
2643 | ||
2644 | int num_dentries = 0; | |
2645 | // adjust auth bits. | |
2646 | list<CDir*> q; | |
2647 | q.push_back(dir); | |
2648 | while (!q.empty()) { | |
2649 | CDir *cur = q.front(); | |
2650 | q.pop_front(); | |
2651 | ||
2652 | // dir | |
2653 | assert(cur->is_auth()); | |
2654 | cur->state_clear(CDir::STATE_AUTH); | |
2655 | cur->remove_bloom(); | |
2656 | cur->clear_replica_map(); | |
2657 | cur->set_replica_nonce(CDir::EXPORT_NONCE); | |
2658 | if (cur->is_dirty()) | |
2659 | cur->mark_clean(); | |
2660 | ||
94b18763 FG |
2661 | for (auto &p : *cur) { |
2662 | CDentry *dn = p.second; | |
7c673cae FG |
2663 | |
2664 | // dentry | |
2665 | dn->state_clear(CDentry::STATE_AUTH); | |
2666 | dn->clear_replica_map(); | |
2667 | dn->set_replica_nonce(CDentry::EXPORT_NONCE); | |
2668 | if (dn->is_dirty()) | |
2669 | dn->mark_clean(); | |
2670 | ||
2671 | // inode? | |
2672 | if (dn->get_linkage()->is_primary()) { | |
2673 | CInode *in = dn->get_linkage()->get_inode(); | |
2674 | in->state_clear(CDentry::STATE_AUTH); | |
2675 | in->clear_replica_map(); | |
2676 | in->set_replica_nonce(CInode::EXPORT_NONCE); | |
2677 | if (in->is_dirty()) | |
2678 | in->mark_clean(); | |
2679 | in->clear_dirty_rstat(); | |
2680 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2681 | in->clear_scatter_dirty(); | |
2682 | in->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2683 | } | |
2684 | ||
2685 | in->clear_dirty_parent(); | |
2686 | ||
2687 | in->authlock.clear_gather(); | |
2688 | in->linklock.clear_gather(); | |
2689 | in->dirfragtreelock.clear_gather(); | |
2690 | in->filelock.clear_gather(); | |
2691 | ||
2692 | in->clear_file_locks(); | |
2693 | ||
2694 | // non-bounding dir? | |
2695 | list<CDir*> dfs; | |
2696 | in->get_dirfrags(dfs); | |
2697 | for (list<CDir*>::iterator p = dfs.begin(); p != dfs.end(); ++p) | |
2698 | if (bounds.count(*p) == 0) | |
2699 | q.push_back(*p); | |
2700 | } | |
2701 | ||
2702 | cache->touch_dentry_bottom(dn); // move dentry to tail of LRU | |
2703 | ++num_dentries; | |
2704 | } | |
2705 | } | |
2706 | ||
2707 | dir->add_waiter(CDir::WAIT_UNFREEZE, fin); | |
2708 | ||
2709 | if (stat.state == IMPORT_ACKING) { | |
2710 | // remove imported caps | |
2711 | for (map<CInode*,map<client_t,Capability::Export> >::iterator p = stat.peer_exports.begin(); | |
28e407b8 AA |
2712 | p != stat.peer_exports.end(); |
2713 | ++p) { | |
7c673cae FG |
2714 | CInode *in = p->first; |
2715 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); | |
28e407b8 AA |
2716 | q != p->second.end(); |
2717 | ++q) { | |
7c673cae | 2718 | Capability *cap = in->get_client_cap(q->first); |
28e407b8 AA |
2719 | if (!cap) { |
2720 | assert(!stat.session_map.count(q->first)); | |
2721 | continue; | |
2722 | } | |
7c673cae FG |
2723 | if (cap->is_importing()) |
2724 | in->remove_client_cap(q->first); | |
2725 | } | |
2726 | in->put(CInode::PIN_IMPORTINGCAPS); | |
2727 | } | |
28e407b8 AA |
2728 | for (auto& p : stat.session_map) { |
2729 | Session *session = p.second.first; | |
7c673cae FG |
2730 | session->dec_importing(); |
2731 | } | |
2732 | } | |
2733 | ||
2734 | // log our failure | |
2735 | mds->mdlog->start_submit_entry(new EImportFinish(dir, false)); // log failure | |
2736 | ||
181888fb | 2737 | cache->trim(num_dentries); // try trimming dentries |
7c673cae FG |
2738 | |
2739 | // notify bystanders; wait in aborting state | |
2740 | import_notify_abort(dir, bounds); | |
2741 | } | |
2742 | ||
2743 | void Migrator::import_notify_finish(CDir *dir, set<CDir*>& bounds) | |
2744 | { | |
2745 | dout(7) << "import_notify_finish " << *dir << dendl; | |
2746 | ||
2747 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2748 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2749 | p != stat.bystanders.end(); | |
2750 | ++p) { | |
2751 | MExportDirNotify *notify = | |
2752 | new MExportDirNotify(dir->dirfrag(), stat.tid, false, | |
2753 | pair<int,int>(stat.peer, mds->get_nodeid()), | |
2754 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
2755 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) | |
2756 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2757 | mds->send_message_mds(notify, *p); | |
2758 | } | |
2759 | } | |
2760 | ||
2761 | void Migrator::import_notify_abort(CDir *dir, set<CDir*>& bounds) | |
2762 | { | |
2763 | dout(7) << "import_notify_abort " << *dir << dendl; | |
2764 | ||
2765 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2766 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2767 | p != stat.bystanders.end(); ) { | |
2768 | if (mds->is_cluster_degraded() && | |
2769 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(*p)) { | |
2770 | // this can happen if both exporter and bystander fail in the same mdsmap epoch | |
2771 | stat.bystanders.erase(p++); | |
2772 | continue; | |
2773 | } | |
2774 | MExportDirNotify *notify = | |
2775 | new MExportDirNotify(dir->dirfrag(), stat.tid, true, | |
2776 | mds_authority_t(stat.peer, mds->get_nodeid()), | |
2777 | mds_authority_t(stat.peer, CDIR_AUTH_UNKNOWN)); | |
2778 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) | |
2779 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2780 | mds->send_message_mds(notify, *p); | |
2781 | ++p; | |
2782 | } | |
2783 | if (stat.bystanders.empty()) { | |
2784 | dout(7) << "no bystanders, finishing reverse now" << dendl; | |
2785 | import_reverse_unfreeze(dir); | |
2786 | } else { | |
2787 | assert (g_conf->mds_kill_import_at != 10); | |
2788 | } | |
2789 | } | |
2790 | ||
2791 | void Migrator::import_reverse_unfreeze(CDir *dir) | |
2792 | { | |
7c673cae | 2793 | dout(7) << "import_reverse_unfreeze " << *dir << dendl; |
224ce89b | 2794 | assert(!dir->is_auth()); |
7c673cae | 2795 | cache->discard_delayed_expire(dir); |
224ce89b WB |
2796 | dir->unfreeze_tree(); |
2797 | if (dir->is_subtree_root()) | |
2798 | cache->try_subtree_merge(dir); | |
7c673cae FG |
2799 | import_reverse_final(dir); |
2800 | } | |
2801 | ||
2802 | void Migrator::import_reverse_final(CDir *dir) | |
2803 | { | |
2804 | dout(7) << "import_reverse_final " << *dir << dendl; | |
2805 | ||
2806 | // clean up | |
2807 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
2808 | assert(it != import_state.end()); | |
2809 | ||
2810 | MutationRef mut = it->second.mut; | |
2811 | import_state.erase(it); | |
2812 | ||
2813 | // send pending import_maps? | |
2814 | mds->mdcache->maybe_send_pending_resolves(); | |
2815 | ||
2816 | if (mut) { | |
2817 | mds->locker->drop_locks(mut.get()); | |
2818 | mut->cleanup(); | |
2819 | } | |
2820 | ||
2821 | cache->show_subtrees(); | |
2822 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) | |
2823 | } | |
2824 | ||
2825 | ||
2826 | ||
2827 | ||
2828 | void Migrator::import_logged_start(dirfrag_t df, CDir *dir, mds_rank_t from, | |
28e407b8 | 2829 | map<client_t,pair<Session*,uint64_t> >& imported_session_map) |
7c673cae FG |
2830 | { |
2831 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
2832 | if (it == import_state.end() || | |
2833 | it->second.state != IMPORT_LOGGINGSTART) { | |
2834 | dout(7) << "import " << df << " must have aborted" << dendl; | |
28e407b8 | 2835 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae FG |
2836 | return; |
2837 | } | |
2838 | ||
2839 | dout(7) << "import_logged " << *dir << dendl; | |
2840 | ||
2841 | // note state | |
2842 | it->second.state = IMPORT_ACKING; | |
2843 | ||
2844 | assert (g_conf->mds_kill_import_at != 7); | |
2845 | ||
2846 | // force open client sessions and finish cap import | |
28e407b8 | 2847 | mds->server->finish_force_open_sessions(imported_session_map, false); |
7c673cae FG |
2848 | |
2849 | map<inodeno_t,map<client_t,Capability::Import> > imported_caps; | |
2850 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
2851 | p != it->second.peer_exports.end(); | |
2852 | ++p) { | |
2853 | // parameter 'peer' is NONE, delay sending cap import messages to client | |
28e407b8 AA |
2854 | finish_import_inode_caps(p->first, MDS_RANK_NONE, true, imported_session_map, |
2855 | p->second, imported_caps[p->first->ino()]); | |
7c673cae | 2856 | } |
28e407b8 AA |
2857 | |
2858 | it->second.session_map.swap(imported_session_map); | |
7c673cae FG |
2859 | |
2860 | // send notify's etc. | |
2861 | dout(7) << "sending ack for " << *dir << " to old auth mds." << from << dendl; | |
2862 | ||
2863 | // test surviving observer of a failed migration that did not complete | |
2864 | //assert(dir->replica_map.size() < 2 || mds->get_nodeid() != 0); | |
2865 | ||
2866 | MExportDirAck *ack = new MExportDirAck(dir->dirfrag(), it->second.tid); | |
2867 | ::encode(imported_caps, ack->imported_caps); | |
2868 | ||
2869 | mds->send_message_mds(ack, from); | |
2870 | assert (g_conf->mds_kill_import_at != 8); | |
2871 | ||
2872 | cache->show_subtrees(); | |
2873 | } | |
2874 | ||
2875 | /* This function DOES put the passed message before returning*/ | |
2876 | void Migrator::handle_export_finish(MExportDirFinish *m) | |
2877 | { | |
2878 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
2879 | assert(dir); | |
2880 | dout(7) << "handle_export_finish on " << *dir << (m->is_last() ? " last" : "") << dendl; | |
2881 | ||
2882 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
2883 | assert(it != import_state.end()); | |
2884 | assert(it->second.tid == m->get_tid()); | |
2885 | ||
2886 | import_finish(dir, false, m->is_last()); | |
2887 | ||
2888 | m->put(); | |
2889 | } | |
2890 | ||
2891 | void Migrator::import_finish(CDir *dir, bool notify, bool last) | |
2892 | { | |
2893 | dout(7) << "import_finish on " << *dir << dendl; | |
2894 | ||
2895 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
2896 | assert(it != import_state.end()); | |
2897 | assert(it->second.state == IMPORT_ACKING || it->second.state == IMPORT_FINISHING); | |
2898 | ||
224ce89b WB |
2899 | if (it->second.state == IMPORT_ACKING) { |
2900 | assert(dir->is_auth()); | |
2901 | cache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); | |
2902 | } | |
2903 | ||
7c673cae FG |
2904 | // log finish |
2905 | assert(g_conf->mds_kill_import_at != 9); | |
2906 | ||
2907 | if (it->second.state == IMPORT_ACKING) { | |
2908 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
2909 | p != it->second.peer_exports.end(); | |
2910 | ++p) { | |
2911 | CInode *in = p->first; | |
2912 | assert(in->is_auth()); | |
2913 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); | |
2914 | q != p->second.end(); | |
2915 | ++q) { | |
28e407b8 AA |
2916 | auto r = it->second.session_map.find(q->first); |
2917 | if (r == it->second.session_map.end()) | |
2918 | continue; | |
2919 | ||
2920 | Session *session = r->second.first; | |
7c673cae FG |
2921 | Capability *cap = in->get_client_cap(q->first); |
2922 | assert(cap); | |
2923 | cap->merge(q->second, true); | |
2924 | cap->clear_importing(); | |
2925 | mds->mdcache->do_cap_import(session, in, cap, q->second.cap_id, q->second.seq, | |
2926 | q->second.mseq - 1, it->second.peer, CEPH_CAP_FLAG_AUTH); | |
2927 | } | |
2928 | p->second.clear(); | |
2929 | in->replica_caps_wanted = 0; | |
2930 | } | |
28e407b8 AA |
2931 | for (auto& p : it->second.session_map) { |
2932 | Session *session = p.second.first; | |
7c673cae FG |
2933 | session->dec_importing(); |
2934 | } | |
2935 | } | |
2936 | ||
2937 | if (!last) { | |
2938 | assert(it->second.state == IMPORT_ACKING); | |
2939 | it->second.state = IMPORT_FINISHING; | |
2940 | return; | |
2941 | } | |
2942 | ||
2943 | // remove pins | |
2944 | set<CDir*> bounds; | |
2945 | cache->get_subtree_bounds(dir, bounds); | |
2946 | ||
2947 | if (notify) | |
2948 | import_notify_finish(dir, bounds); | |
2949 | ||
2950 | import_remove_pins(dir, bounds); | |
2951 | ||
2952 | map<CInode*, map<client_t,Capability::Export> > peer_exports; | |
2953 | it->second.peer_exports.swap(peer_exports); | |
2954 | ||
2955 | // clear import state (we're done!) | |
2956 | MutationRef mut = it->second.mut; | |
2957 | import_state.erase(it); | |
2958 | ||
7c673cae FG |
2959 | mds->mdlog->start_submit_entry(new EImportFinish(dir, true)); |
2960 | ||
7c673cae FG |
2961 | // process delayed expires |
2962 | cache->process_delayed_expire(dir); | |
2963 | ||
224ce89b | 2964 | // unfreeze tree, with possible subtree merge. |
7c673cae | 2965 | dir->unfreeze_tree(); |
224ce89b WB |
2966 | cache->try_subtree_merge(dir); |
2967 | ||
7c673cae FG |
2968 | cache->show_subtrees(); |
2969 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) | |
2970 | ||
2971 | if (mut) { | |
2972 | mds->locker->drop_locks(mut.get()); | |
2973 | mut->cleanup(); | |
2974 | } | |
2975 | ||
2976 | // re-eval imported caps | |
2977 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = peer_exports.begin(); | |
2978 | p != peer_exports.end(); | |
2979 | ++p) { | |
2980 | if (p->first->is_auth()) | |
2981 | mds->locker->eval(p->first, CEPH_CAP_LOCKS, true); | |
2982 | p->first->put(CInode::PIN_IMPORTINGCAPS); | |
2983 | } | |
2984 | ||
2985 | // send pending import_maps? | |
2986 | mds->mdcache->maybe_send_pending_resolves(); | |
2987 | ||
2988 | // did i just import mydir? | |
2989 | if (dir->ino() == MDS_INO_MDSDIR(mds->get_nodeid())) | |
2990 | cache->populate_mydir(); | |
2991 | ||
2992 | // is it empty? | |
2993 | if (dir->get_num_head_items() == 0 && | |
2994 | !dir->inode->is_auth()) { | |
2995 | // reexport! | |
2996 | export_empty_import(dir); | |
2997 | } | |
2998 | } | |
2999 | ||
3000 | ||
3001 | void Migrator::decode_import_inode(CDentry *dn, bufferlist::iterator& blp, | |
3002 | mds_rank_t oldauth, LogSegment *ls, | |
3003 | map<CInode*, map<client_t,Capability::Export> >& peer_exports, | |
3004 | list<ScatterLock*>& updated_scatterlocks) | |
3005 | { | |
3006 | dout(15) << "decode_import_inode on " << *dn << dendl; | |
3007 | ||
3008 | inodeno_t ino; | |
3009 | snapid_t last; | |
3010 | ::decode(ino, blp); | |
3011 | ::decode(last, blp); | |
3012 | ||
3013 | bool added = false; | |
3014 | CInode *in = cache->get_inode(ino, last); | |
3015 | if (!in) { | |
3016 | in = new CInode(mds->mdcache, true, 1, last); | |
3017 | added = true; | |
3018 | } | |
3019 | ||
3020 | // state after link -- or not! -sage | |
3021 | in->decode_import(blp, ls); // cap imports are noted for later action | |
3022 | ||
3023 | // caps | |
3024 | decode_import_inode_caps(in, true, blp, peer_exports); | |
3025 | ||
3026 | // link before state -- or not! -sage | |
3027 | if (dn->get_linkage()->get_inode() != in) { | |
3028 | assert(!dn->get_linkage()->get_inode()); | |
3029 | dn->dir->link_primary_inode(dn, in); | |
3030 | } | |
28e407b8 AA |
3031 | |
3032 | if (in->is_dir()) | |
3033 | dn->dir->pop_lru_subdirs.push_back(&in->item_pop_lru); | |
7c673cae FG |
3034 | |
3035 | // add inode? | |
3036 | if (added) { | |
3037 | cache->add_inode(in); | |
3038 | dout(10) << "added " << *in << dendl; | |
3039 | } else { | |
3040 | dout(10) << " had " << *in << dendl; | |
3041 | } | |
3042 | ||
3043 | if (in->inode.is_dirty_rstat()) | |
3044 | in->mark_dirty_rstat(); | |
3045 | ||
3046 | // clear if dirtyscattered, since we're going to journal this | |
3047 | // but not until we _actually_ finish the import... | |
3048 | if (in->filelock.is_dirty()) { | |
3049 | updated_scatterlocks.push_back(&in->filelock); | |
3050 | mds->locker->mark_updated_scatterlock(&in->filelock); | |
3051 | } | |
3052 | ||
3053 | if (in->dirfragtreelock.is_dirty()) { | |
3054 | updated_scatterlocks.push_back(&in->dirfragtreelock); | |
3055 | mds->locker->mark_updated_scatterlock(&in->dirfragtreelock); | |
3056 | } | |
3057 | ||
3058 | // adjust replica list | |
3059 | //assert(!in->is_replica(oldauth)); // not true on failed export | |
3060 | in->add_replica(oldauth, CInode::EXPORT_NONCE); | |
3061 | if (in->is_replica(mds->get_nodeid())) | |
3062 | in->remove_replica(mds->get_nodeid()); | |
3063 | } | |
3064 | ||
3065 | void Migrator::decode_import_inode_caps(CInode *in, bool auth_cap, | |
3066 | bufferlist::iterator &blp, | |
3067 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) | |
3068 | { | |
3069 | map<client_t,Capability::Export> cap_map; | |
3070 | ::decode(cap_map, blp); | |
3071 | if (auth_cap) | |
3072 | ::decode(in->get_mds_caps_wanted(), blp); | |
3073 | if (!cap_map.empty() || | |
b32b8144 | 3074 | (auth_cap && (in->get_caps_wanted() & ~CEPH_CAP_PIN))) { |
7c673cae FG |
3075 | peer_exports[in].swap(cap_map); |
3076 | in->get(CInode::PIN_IMPORTINGCAPS); | |
3077 | } | |
3078 | } | |
3079 | ||
3080 | void Migrator::finish_import_inode_caps(CInode *in, mds_rank_t peer, bool auth_cap, | |
28e407b8 AA |
3081 | const map<client_t,pair<Session*,uint64_t> >& session_map, |
3082 | const map<client_t,Capability::Export> &export_map, | |
7c673cae FG |
3083 | map<client_t,Capability::Import> &import_map) |
3084 | { | |
28e407b8 AA |
3085 | for (auto& it : export_map) { |
3086 | dout(10) << "finish_import_inode_caps for client." << it.first << " on " << *in << dendl; | |
3087 | ||
3088 | auto p = session_map.find(it.first); | |
3089 | if (p == session_map.end()) { | |
3090 | dout(10) << " no session for client." << it.first << dendl; | |
3091 | (void)import_map[it.first]; | |
3092 | continue; | |
3093 | } | |
7c673cae | 3094 | |
28e407b8 AA |
3095 | Session *session = p->second.first; |
3096 | ||
3097 | Capability *cap = in->get_client_cap(it.first); | |
7c673cae | 3098 | if (!cap) { |
28e407b8 | 3099 | cap = in->add_client_cap(it.first, session); |
7c673cae FG |
3100 | if (peer < 0) |
3101 | cap->mark_importing(); | |
3102 | } | |
3103 | ||
1adf2230 AA |
3104 | // Always ask exporter mds to send cap export messages for auth caps. |
3105 | // For non-auth caps, ask exporter mds to send cap export messages to | |
3106 | // clients who haven't opened sessions. The cap export messages will | |
3107 | // make clients open sessions. | |
3108 | if (auth_cap || session->connection == nullptr) { | |
3109 | Capability::Import& im = import_map[it.first]; | |
3110 | im.cap_id = cap->get_cap_id(); | |
3111 | im.mseq = auth_cap ? it.second.mseq : cap->get_mseq(); | |
3112 | im.issue_seq = cap->get_last_seq() + 1; | |
3113 | } | |
7c673cae FG |
3114 | |
3115 | if (peer >= 0) { | |
28e407b8 AA |
3116 | cap->merge(it.second, auth_cap); |
3117 | mds->mdcache->do_cap_import(session, in, cap, it.second.cap_id, | |
3118 | it.second.seq, it.second.mseq - 1, peer, | |
7c673cae FG |
3119 | auth_cap ? CEPH_CAP_FLAG_AUTH : CEPH_CAP_FLAG_RELEASE); |
3120 | } | |
3121 | } | |
3122 | ||
3123 | if (peer >= 0) { | |
3124 | in->replica_caps_wanted = 0; | |
3125 | in->put(CInode::PIN_IMPORTINGCAPS); | |
3126 | } | |
3127 | } | |
3128 | ||
3129 | int Migrator::decode_import_dir(bufferlist::iterator& blp, | |
3130 | mds_rank_t oldauth, | |
3131 | CDir *import_root, | |
3132 | EImportStart *le, | |
3133 | LogSegment *ls, | |
3134 | map<CInode*,map<client_t,Capability::Export> >& peer_exports, | |
3135 | list<ScatterLock*>& updated_scatterlocks, utime_t now) | |
3136 | { | |
3137 | // set up dir | |
3138 | dirfrag_t df; | |
3139 | ::decode(df, blp); | |
3140 | ||
3141 | CInode *diri = cache->get_inode(df.ino); | |
3142 | assert(diri); | |
3143 | CDir *dir = diri->get_or_open_dirfrag(mds->mdcache, df.frag); | |
3144 | assert(dir); | |
3145 | ||
3146 | dout(7) << "decode_import_dir " << *dir << dendl; | |
3147 | ||
3148 | // assimilate state | |
3149 | dir->decode_import(blp, now, ls); | |
3150 | ||
3151 | // adjust replica list | |
3152 | //assert(!dir->is_replica(oldauth)); // not true on failed export | |
3153 | dir->add_replica(oldauth, CDir::EXPORT_NONCE); | |
3154 | if (dir->is_replica(mds->get_nodeid())) | |
3155 | dir->remove_replica(mds->get_nodeid()); | |
3156 | ||
3157 | // add to journal entry | |
3158 | if (le) | |
3159 | le->metablob.add_import_dir(dir); | |
3160 | ||
3161 | int num_imported = 0; | |
3162 | ||
3163 | // take all waiters on this dir | |
3164 | // NOTE: a pass of imported data is guaranteed to get all of my waiters because | |
3165 | // a replica's presense in my cache implies/forces it's presense in authority's. | |
3166 | list<MDSInternalContextBase*> waiters; | |
3167 | ||
3168 | dir->take_waiting(CDir::WAIT_ANY_MASK, waiters); | |
3169 | for (list<MDSInternalContextBase*>::iterator it = waiters.begin(); | |
3170 | it != waiters.end(); | |
3171 | ++it) | |
3172 | import_root->add_waiter(CDir::WAIT_UNFREEZE, *it); // UNFREEZE will get kicked both on success or failure | |
3173 | ||
3174 | dout(15) << "doing contents" << dendl; | |
3175 | ||
3176 | // contents | |
3177 | __u32 nden; | |
3178 | ::decode(nden, blp); | |
3179 | ||
3180 | for (; nden>0; nden--) { | |
3181 | num_imported++; | |
3182 | ||
3183 | // dentry | |
3184 | string dname; | |
3185 | snapid_t last; | |
3186 | ::decode(dname, blp); | |
3187 | ::decode(last, blp); | |
3188 | ||
3189 | CDentry *dn = dir->lookup_exact_snap(dname, last); | |
3190 | if (!dn) | |
3191 | dn = dir->add_null_dentry(dname, 1, last); | |
3192 | ||
3193 | dn->decode_import(blp, ls); | |
3194 | ||
3195 | dn->add_replica(oldauth, CDentry::EXPORT_NONCE); | |
3196 | if (dn->is_replica(mds->get_nodeid())) | |
3197 | dn->remove_replica(mds->get_nodeid()); | |
3198 | ||
3199 | // dentry lock in unreadable state can block path traverse | |
3200 | if (dn->lock.get_state() != LOCK_SYNC) | |
3201 | mds->locker->try_eval(&dn->lock, NULL); | |
3202 | ||
3203 | dout(15) << "decode_import_dir got " << *dn << dendl; | |
3204 | ||
3205 | // points to... | |
3206 | char icode; | |
3207 | ::decode(icode, blp); | |
3208 | ||
3209 | if (icode == 'N') { | |
3210 | // null dentry | |
3211 | assert(dn->get_linkage()->is_null()); | |
3212 | ||
3213 | // fall thru | |
3214 | } | |
3215 | else if (icode == 'L') { | |
3216 | // remote link | |
3217 | inodeno_t ino; | |
3218 | unsigned char d_type; | |
3219 | ::decode(ino, blp); | |
3220 | ::decode(d_type, blp); | |
3221 | if (dn->get_linkage()->is_remote()) { | |
3222 | assert(dn->get_linkage()->get_remote_ino() == ino); | |
3223 | } else { | |
3224 | dir->link_remote_inode(dn, ino, d_type); | |
3225 | } | |
3226 | } | |
3227 | else if (icode == 'I') { | |
3228 | // inode | |
3229 | assert(le); | |
3230 | decode_import_inode(dn, blp, oldauth, ls, | |
3231 | peer_exports, updated_scatterlocks); | |
3232 | } | |
3233 | ||
3234 | // add dentry to journal entry | |
3235 | if (le) | |
3236 | le->metablob.add_import_dentry(dn); | |
3237 | } | |
3238 | ||
3239 | #ifdef MDS_VERIFY_FRAGSTAT | |
3240 | if (dir->is_complete()) | |
3241 | dir->verify_fragstat(); | |
3242 | #endif | |
3243 | ||
3244 | dir->inode->maybe_export_pin(); | |
3245 | ||
3246 | dout(7) << "decode_import_dir done " << *dir << dendl; | |
3247 | return num_imported; | |
3248 | } | |
3249 | ||
3250 | ||
3251 | ||
3252 | ||
3253 | ||
3254 | // authority bystander | |
3255 | ||
3256 | /* This function DOES put the passed message before returning*/ | |
3257 | void Migrator::handle_export_notify(MExportDirNotify *m) | |
3258 | { | |
3259 | if (!(mds->is_clientreplay() || mds->is_active() || mds->is_stopping())) { | |
3260 | m->put(); | |
3261 | return; | |
3262 | } | |
3263 | ||
3264 | CDir *dir = cache->get_dirfrag(m->get_dirfrag()); | |
3265 | ||
3266 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
3267 | mds_authority_t old_auth = m->get_old_auth(); | |
3268 | mds_authority_t new_auth = m->get_new_auth(); | |
3269 | ||
3270 | if (!dir) { | |
3271 | dout(7) << "handle_export_notify " << old_auth << " -> " << new_auth | |
3272 | << " on missing dir " << m->get_dirfrag() << dendl; | |
3273 | } else if (dir->authority() != old_auth) { | |
3274 | dout(7) << "handle_export_notify old_auth was " << dir->authority() | |
3275 | << " != " << old_auth << " -> " << new_auth | |
3276 | << " on " << *dir << dendl; | |
3277 | } else { | |
3278 | dout(7) << "handle_export_notify " << old_auth << " -> " << new_auth | |
3279 | << " on " << *dir << dendl; | |
3280 | // adjust auth | |
3281 | set<CDir*> have; | |
3282 | cache->map_dirfrag_set(m->get_bounds(), have); | |
3283 | cache->adjust_bounded_subtree_auth(dir, have, new_auth); | |
3284 | ||
3285 | // induce a merge? | |
3286 | cache->try_subtree_merge(dir); | |
3287 | } | |
3288 | ||
3289 | // send ack | |
3290 | if (m->wants_ack()) { | |
3291 | mds->send_message_mds(new MExportDirNotifyAck(m->get_dirfrag(), m->get_tid(), m->get_new_auth()), from); | |
3292 | } else { | |
3293 | // aborted. no ack. | |
3294 | dout(7) << "handle_export_notify no ack requested" << dendl; | |
3295 | } | |
3296 | ||
3297 | m->put(); | |
3298 | } | |
3299 | ||
3300 | /** cap exports **/ | |
3301 | void Migrator::export_caps(CInode *in) | |
3302 | { | |
3303 | mds_rank_t dest = in->authority().first; | |
3304 | dout(7) << "export_caps to mds." << dest << " " << *in << dendl; | |
3305 | ||
3306 | assert(in->is_any_caps()); | |
3307 | assert(!in->is_auth()); | |
3308 | assert(!in->is_ambiguous_auth()); | |
3309 | assert(!in->state_test(CInode::STATE_EXPORTINGCAPS)); | |
3310 | ||
3311 | MExportCaps *ex = new MExportCaps; | |
3312 | ex->ino = in->ino(); | |
3313 | ||
3314 | encode_export_inode_caps(in, false, ex->cap_bl, ex->client_map); | |
3315 | ||
3316 | mds->send_message_mds(ex, dest); | |
3317 | } | |
3318 | ||
1adf2230 AA |
3319 | /* This function DOES put the passed message before returning*/ |
3320 | void Migrator::handle_export_caps_ack(MExportCapsAck *ack) | |
3321 | { | |
3322 | mds_rank_t from = ack->get_source().num(); | |
3323 | CInode *in = cache->get_inode(ack->ino); | |
3324 | if (in) { | |
3325 | assert(!in->is_auth()); | |
3326 | ||
3327 | dout(10) << "handle_export_caps_ack " << *ack << " from " | |
3328 | << ack->get_source() << " on " << *in << dendl; | |
3329 | ||
3330 | map<client_t,Capability::Import> imported_caps; | |
3331 | map<client_t,uint64_t> caps_ids; | |
3332 | auto blp = ack->cap_bl.begin(); | |
3333 | ::decode(imported_caps, blp); | |
3334 | ::decode(caps_ids, blp); | |
3335 | ||
3336 | for (auto& it : imported_caps) { | |
3337 | Capability *cap = in->get_client_cap(it.first); | |
3338 | if (!cap || cap->get_cap_id() != caps_ids.at(it.first)) | |
3339 | continue; | |
3340 | ||
3341 | dout(7) << __func__ << " telling client." << it.first | |
3342 | << " exported caps on " << *in << dendl; | |
3343 | MClientCaps *m = new MClientCaps(CEPH_CAP_OP_EXPORT, in->ino(), 0, | |
3344 | cap->get_cap_id(), cap->get_mseq(), | |
3345 | mds->get_osd_epoch_barrier()); | |
3346 | m->set_cap_peer(it.second.cap_id, it.second.issue_seq, it.second.mseq, from, 0); | |
3347 | mds->send_message_client_counted(m, it.first); | |
3348 | ||
3349 | in->remove_client_cap(it.first); | |
3350 | } | |
3351 | ||
3352 | mds->locker->request_inode_file_caps(in); | |
3353 | mds->locker->try_eval(in, CEPH_CAP_LOCKS); | |
3354 | } | |
3355 | ||
3356 | ack->put(); | |
3357 | } | |
3358 | ||
7c673cae FG |
3359 | void Migrator::handle_gather_caps(MGatherCaps *m) |
3360 | { | |
3361 | CInode *in = cache->get_inode(m->ino); | |
7c673cae FG |
3362 | if (!in) |
3363 | goto out; | |
3364 | ||
3365 | dout(10) << "handle_gather_caps " << *m << " from " << m->get_source() | |
1adf2230 AA |
3366 | << " on " << *in << dendl; |
3367 | ||
7c673cae FG |
3368 | if (in->is_any_caps() && |
3369 | !in->is_auth() && | |
3370 | !in->is_ambiguous_auth() && | |
3371 | !in->state_test(CInode::STATE_EXPORTINGCAPS)) | |
3372 | export_caps(in); | |
3373 | ||
3374 | out: | |
3375 | m->put(); | |
3376 | } | |
3377 | ||
3378 | class C_M_LoggedImportCaps : public MigratorLogContext { | |
3379 | CInode *in; | |
3380 | mds_rank_t from; | |
3381 | public: | |
28e407b8 | 3382 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae | 3383 | map<CInode*, map<client_t,Capability::Export> > peer_exports; |
7c673cae FG |
3384 | |
3385 | C_M_LoggedImportCaps(Migrator *m, CInode *i, mds_rank_t f) : MigratorLogContext(m), in(i), from(f) {} | |
3386 | void finish(int r) override { | |
28e407b8 | 3387 | mig->logged_import_caps(in, from, imported_session_map, peer_exports); |
7c673cae FG |
3388 | } |
3389 | }; | |
3390 | ||
3391 | /* This function DOES put the passed message before returning*/ | |
3392 | void Migrator::handle_export_caps(MExportCaps *ex) | |
3393 | { | |
3394 | dout(10) << "handle_export_caps " << *ex << " from " << ex->get_source() << dendl; | |
3395 | CInode *in = cache->get_inode(ex->ino); | |
3396 | ||
3397 | assert(in); | |
3398 | assert(in->is_auth()); | |
3399 | ||
3400 | // FIXME | |
28e407b8 AA |
3401 | if (!in->can_auth_pin()) { |
3402 | ex->put(); | |
7c673cae | 3403 | return; |
28e407b8 AA |
3404 | } |
3405 | ||
181888fb | 3406 | in->auth_pin(this); |
7c673cae | 3407 | |
28e407b8 AA |
3408 | map<client_t,entity_inst_t> client_map; |
3409 | client_map.swap(ex->client_map); | |
3410 | ||
7c673cae FG |
3411 | C_M_LoggedImportCaps *finish = new C_M_LoggedImportCaps( |
3412 | this, in, mds_rank_t(ex->get_source().num())); | |
7c673cae | 3413 | |
28e407b8 AA |
3414 | version_t pv = mds->server->prepare_force_open_sessions(client_map, |
3415 | finish->imported_session_map); | |
7c673cae FG |
3416 | // decode new caps |
3417 | bufferlist::iterator blp = ex->cap_bl.begin(); | |
3418 | decode_import_inode_caps(in, false, blp, finish->peer_exports); | |
3419 | assert(!finish->peer_exports.empty()); // thus, inode is pinned. | |
3420 | ||
3421 | // journal open client sessions | |
7c673cae | 3422 | |
28e407b8 | 3423 | ESessions *le = new ESessions(pv, client_map); |
7c673cae FG |
3424 | mds->mdlog->start_submit_entry(le, finish); |
3425 | mds->mdlog->flush(); | |
3426 | ||
3427 | ex->put(); | |
3428 | } | |
3429 | ||
3430 | ||
3431 | void Migrator::logged_import_caps(CInode *in, | |
3432 | mds_rank_t from, | |
28e407b8 AA |
3433 | map<client_t,pair<Session*,uint64_t> >& imported_session_map, |
3434 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) | |
7c673cae FG |
3435 | { |
3436 | dout(10) << "logged_import_caps on " << *in << dendl; | |
3437 | // see export_go() vs export_go_synced() | |
3438 | assert(in->is_auth()); | |
3439 | ||
3440 | // force open client sessions and finish cap import | |
28e407b8 | 3441 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae | 3442 | |
28e407b8 AA |
3443 | auto it = peer_exports.find(in); |
3444 | assert(it != peer_exports.end()); | |
3445 | ||
7c673cae | 3446 | // clients will release caps from the exporter when they receive the cap import message. |
1adf2230 | 3447 | map<client_t,Capability::Import> imported_caps; |
28e407b8 | 3448 | finish_import_inode_caps(in, from, false, imported_session_map, it->second, imported_caps); |
7c673cae | 3449 | mds->locker->eval(in, CEPH_CAP_LOCKS, true); |
1adf2230 AA |
3450 | |
3451 | if (!imported_caps.empty()) { | |
3452 | MExportCapsAck *ack = new MExportCapsAck(in->ino()); | |
3453 | map<client_t,uint64_t> peer_caps_ids; | |
3454 | for (auto &p : imported_caps ) | |
3455 | peer_caps_ids[p.first] = it->second.at(p.first).cap_id; | |
3456 | ||
3457 | ::encode(imported_caps, ack->cap_bl); | |
3458 | ::encode(peer_caps_ids, ack->cap_bl); | |
3459 | mds->send_message_mds(ack, from); | |
3460 | } | |
3461 | ||
181888fb | 3462 | in->auth_unpin(this); |
7c673cae | 3463 | } |
28e407b8 AA |
3464 | |
3465 | void Migrator::handle_conf_change(const struct md_config_t *conf, | |
3466 | const std::set <std::string> &changed, | |
3467 | const MDSMap &mds_map) | |
3468 | { | |
3469 | if (changed.count("mds_inject_migrator_session_race")) { | |
3470 | inject_session_race = conf->get_val<bool>("mds_inject_migrator_session_race"); | |
3471 | dout(0) << "mds_inject_migrator_session_race is " << inject_session_race << dendl; | |
3472 | } | |
1adf2230 AA |
3473 | |
3474 | if (changed.count("mds_inject_migrator_message_loss")) { | |
3475 | inject_message_loss = g_conf->get_val<int64_t>("mds_inject_migrator_message_loss"); | |
3476 | dout(0) << "mds_inject_migrator_message_loss is " << inject_message_loss << dendl; | |
3477 | } | |
28e407b8 | 3478 | } |