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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 | ||
7c673cae FG |
41 | /* |
42 | * this is what the dir->dir_auth values look like | |
43 | * | |
44 | * dir_auth authbits | |
45 | * export | |
46 | * me me - before | |
47 | * me, me me - still me, but preparing for export | |
48 | * me, them me - send MExportDir (peer is preparing) | |
49 | * them, me me - journaled EExport | |
50 | * them them - done | |
51 | * | |
52 | * import: | |
53 | * them them - before | |
54 | * me, them me - journaled EImportStart | |
55 | * me me - done | |
56 | * | |
57 | * which implies: | |
58 | * - auth bit is set if i am listed as first _or_ second dir_auth. | |
59 | */ | |
60 | ||
61 | #include "common/config.h" | |
62 | ||
63 | ||
64 | #define dout_context g_ceph_context | |
65 | #define dout_subsys ceph_subsys_mds | |
66 | #undef dout_prefix | |
9f95a23c | 67 | #define dout_prefix *_dout << "mds." << mds->get_nodeid() << ".mig " << __func__ << " " |
7c673cae FG |
68 | |
69 | ||
11fdf7f2 | 70 | class MigratorContext : public MDSContext { |
7c673cae FG |
71 | protected: |
72 | Migrator *mig; | |
73 | MDSRank *get_mds() override { | |
74 | return mig->mds; | |
75 | } | |
76 | public: | |
77 | explicit MigratorContext(Migrator *mig_) : mig(mig_) { | |
11fdf7f2 | 78 | ceph_assert(mig != NULL); |
7c673cae FG |
79 | } |
80 | }; | |
81 | ||
82 | class MigratorLogContext : public MDSLogContextBase { | |
83 | protected: | |
84 | Migrator *mig; | |
85 | MDSRank *get_mds() override { | |
86 | return mig->mds; | |
87 | } | |
88 | public: | |
89 | explicit MigratorLogContext(Migrator *mig_) : mig(mig_) { | |
11fdf7f2 | 90 | ceph_assert(mig != NULL); |
7c673cae FG |
91 | } |
92 | }; | |
93 | ||
9f95a23c | 94 | void Migrator::dispatch(const cref_t<Message> &m) |
7c673cae FG |
95 | { |
96 | switch (m->get_type()) { | |
97 | // import | |
98 | case MSG_MDS_EXPORTDIRDISCOVER: | |
9f95a23c | 99 | handle_export_discover(ref_cast<MExportDirDiscover>(m)); |
7c673cae FG |
100 | break; |
101 | case MSG_MDS_EXPORTDIRPREP: | |
9f95a23c | 102 | handle_export_prep(ref_cast<MExportDirPrep>(m)); |
7c673cae FG |
103 | break; |
104 | case MSG_MDS_EXPORTDIR: | |
28e407b8 AA |
105 | if (unlikely(inject_session_race)) { |
106 | dout(0) << "waiting for inject_session_race" << dendl; | |
107 | mds->wait_for_any_client_connection(new C_MDS_RetryMessage(mds, m)); | |
108 | } else { | |
9f95a23c | 109 | handle_export_dir(ref_cast<MExportDir>(m)); |
28e407b8 | 110 | } |
7c673cae FG |
111 | break; |
112 | case MSG_MDS_EXPORTDIRFINISH: | |
9f95a23c | 113 | handle_export_finish(ref_cast<MExportDirFinish>(m)); |
7c673cae FG |
114 | break; |
115 | case MSG_MDS_EXPORTDIRCANCEL: | |
9f95a23c | 116 | handle_export_cancel(ref_cast<MExportDirCancel>(m)); |
7c673cae FG |
117 | break; |
118 | ||
119 | // export | |
120 | case MSG_MDS_EXPORTDIRDISCOVERACK: | |
9f95a23c | 121 | handle_export_discover_ack(ref_cast<MExportDirDiscoverAck>(m)); |
7c673cae FG |
122 | break; |
123 | case MSG_MDS_EXPORTDIRPREPACK: | |
9f95a23c | 124 | handle_export_prep_ack(ref_cast<MExportDirPrepAck>(m)); |
7c673cae FG |
125 | break; |
126 | case MSG_MDS_EXPORTDIRACK: | |
9f95a23c | 127 | handle_export_ack(ref_cast<MExportDirAck>(m)); |
7c673cae FG |
128 | break; |
129 | case MSG_MDS_EXPORTDIRNOTIFYACK: | |
9f95a23c | 130 | handle_export_notify_ack(ref_cast<MExportDirNotifyAck>(m)); |
11fdf7f2 | 131 | break; |
7c673cae FG |
132 | |
133 | // export 3rd party (dir_auth adjustments) | |
134 | case MSG_MDS_EXPORTDIRNOTIFY: | |
9f95a23c | 135 | handle_export_notify(ref_cast<MExportDirNotify>(m)); |
7c673cae FG |
136 | break; |
137 | ||
138 | // caps | |
139 | case MSG_MDS_EXPORTCAPS: | |
9f95a23c | 140 | handle_export_caps(ref_cast<MExportCaps>(m)); |
7c673cae | 141 | break; |
1adf2230 | 142 | case MSG_MDS_EXPORTCAPSACK: |
9f95a23c | 143 | handle_export_caps_ack(ref_cast<MExportCapsAck>(m)); |
1adf2230 | 144 | break; |
7c673cae | 145 | case MSG_MDS_GATHERCAPS: |
9f95a23c | 146 | handle_gather_caps(ref_cast<MGatherCaps>(m)); |
7c673cae FG |
147 | break; |
148 | ||
149 | default: | |
150 | derr << "migrator unknown message " << m->get_type() << dendl; | |
11fdf7f2 | 151 | ceph_abort_msg("migrator unknown message"); |
7c673cae FG |
152 | } |
153 | } | |
154 | ||
155 | ||
156 | class C_MDC_EmptyImport : public MigratorContext { | |
157 | CDir *dir; | |
158 | public: | |
9f95a23c TL |
159 | C_MDC_EmptyImport(Migrator *m, CDir *d) : |
160 | MigratorContext(m), dir(d) { | |
161 | dir->get(CDir::PIN_PTRWAITER); | |
162 | } | |
7c673cae FG |
163 | void finish(int r) override { |
164 | mig->export_empty_import(dir); | |
9f95a23c | 165 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
166 | } |
167 | }; | |
168 | ||
169 | ||
170 | void Migrator::export_empty_import(CDir *dir) | |
171 | { | |
9f95a23c | 172 | dout(7) << *dir << dendl; |
11fdf7f2 | 173 | ceph_assert(dir->is_subtree_root()); |
7c673cae FG |
174 | |
175 | if (dir->inode->is_auth()) { | |
176 | dout(7) << " inode is auth" << dendl; | |
177 | return; | |
178 | } | |
179 | if (!dir->is_auth()) { | |
180 | dout(7) << " not auth" << dendl; | |
181 | return; | |
182 | } | |
183 | if (dir->is_freezing() || dir->is_frozen()) { | |
184 | dout(7) << " freezing or frozen" << dendl; | |
185 | return; | |
186 | } | |
187 | if (dir->get_num_head_items() > 0) { | |
188 | dout(7) << " not actually empty" << dendl; | |
189 | return; | |
190 | } | |
191 | if (dir->inode->is_root()) { | |
192 | dout(7) << " root" << dendl; | |
193 | return; | |
194 | } | |
195 | ||
196 | mds_rank_t dest = dir->inode->authority().first; | |
197 | //if (mds->is_shutting_down()) dest = 0; // this is more efficient. | |
198 | ||
199 | dout(7) << " really empty, exporting to " << dest << dendl; | |
200 | assert (dest != mds->get_nodeid()); | |
201 | ||
202 | dout(7) << "exporting to mds." << dest | |
203 | << " empty import " << *dir << dendl; | |
204 | export_dir( dir, dest ); | |
205 | } | |
206 | ||
207 | void Migrator::find_stale_export_freeze() | |
208 | { | |
209 | utime_t now = ceph_clock_now(); | |
210 | utime_t cutoff = now; | |
11fdf7f2 | 211 | cutoff -= g_conf()->mds_freeze_tree_timeout; |
7c673cae FG |
212 | |
213 | ||
214 | /* | |
215 | * We could have situations like: | |
216 | * | |
217 | * - mds.0 authpins an item in subtree A | |
218 | * - mds.0 sends request to mds.1 to authpin an item in subtree B | |
219 | * - mds.0 freezes subtree A | |
220 | * - mds.1 authpins an item in subtree B | |
221 | * - mds.1 sends request to mds.0 to authpin an item in subtree A | |
222 | * - mds.1 freezes subtree B | |
223 | * - mds.1 receives the remote authpin request from mds.0 | |
224 | * (wait because subtree B is freezing) | |
225 | * - mds.0 receives the remote authpin request from mds.1 | |
226 | * (wait because subtree A is freezing) | |
227 | * | |
228 | * | |
229 | * - client request authpins items in subtree B | |
230 | * - freeze subtree B | |
231 | * - import subtree A which is parent of subtree B | |
232 | * (authpins parent inode of subtree B, see CDir::set_dir_auth()) | |
233 | * - freeze subtree A | |
234 | * - client request tries authpinning items in subtree A | |
235 | * (wait because subtree A is freezing) | |
236 | */ | |
237 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
238 | p != export_state.end(); ) { | |
239 | CDir* dir = p->first; | |
240 | export_state_t& stat = p->second; | |
241 | ++p; | |
242 | if (stat.state != EXPORT_DISCOVERING && stat.state != EXPORT_FREEZING) | |
243 | continue; | |
11fdf7f2 TL |
244 | ceph_assert(dir->freeze_tree_state); |
245 | if (stat.last_cum_auth_pins != dir->freeze_tree_state->auth_pins) { | |
246 | stat.last_cum_auth_pins = dir->freeze_tree_state->auth_pins; | |
7c673cae FG |
247 | stat.last_cum_auth_pins_change = now; |
248 | continue; | |
249 | } | |
250 | if (stat.last_cum_auth_pins_change >= cutoff) | |
251 | continue; | |
252 | if (stat.num_remote_waiters > 0 || | |
253 | (!dir->inode->is_root() && dir->get_parent_dir()->is_freezing())) { | |
254 | export_try_cancel(dir); | |
255 | } | |
256 | } | |
257 | } | |
258 | ||
259 | void Migrator::export_try_cancel(CDir *dir, bool notify_peer) | |
260 | { | |
9f95a23c | 261 | dout(10) << *dir << dendl; |
7c673cae FG |
262 | |
263 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
11fdf7f2 | 264 | ceph_assert(it != export_state.end()); |
7c673cae FG |
265 | |
266 | int state = it->second.state; | |
267 | switch (state) { | |
268 | case EXPORT_LOCKING: | |
269 | dout(10) << "export state=locking : dropping locks and removing auth_pin" << dendl; | |
91327a77 | 270 | num_locking_exports--; |
7c673cae FG |
271 | it->second.state = EXPORT_CANCELLED; |
272 | dir->auth_unpin(this); | |
273 | break; | |
274 | case EXPORT_DISCOVERING: | |
275 | dout(10) << "export state=discovering : canceling freeze and removing auth_pin" << dendl; | |
276 | it->second.state = EXPORT_CANCELLED; | |
277 | dir->unfreeze_tree(); // cancel the freeze | |
278 | dir->auth_unpin(this); | |
279 | if (notify_peer && | |
280 | (!mds->is_cluster_degraded() || | |
281 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
282 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
283 | it->second.tid), | |
284 | it->second.peer); | |
7c673cae FG |
285 | break; |
286 | ||
287 | case EXPORT_FREEZING: | |
288 | dout(10) << "export state=freezing : canceling freeze" << dendl; | |
289 | it->second.state = EXPORT_CANCELLED; | |
290 | dir->unfreeze_tree(); // cancel the freeze | |
224ce89b | 291 | if (dir->is_subtree_root()) |
f67539c2 | 292 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
293 | if (notify_peer && |
294 | (!mds->is_cluster_degraded() || | |
295 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
296 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
297 | it->second.tid), | |
298 | it->second.peer); | |
7c673cae FG |
299 | break; |
300 | ||
301 | // NOTE: state order reversal, warning comes after prepping | |
302 | case EXPORT_WARNING: | |
303 | dout(10) << "export state=warning : unpinning bounds, unfreezing, notifying" << dendl; | |
304 | it->second.state = EXPORT_CANCELLING; | |
305 | // fall-thru | |
306 | ||
307 | case EXPORT_PREPPING: | |
308 | if (state != EXPORT_WARNING) { | |
309 | dout(10) << "export state=prepping : unpinning bounds, unfreezing" << dendl; | |
310 | it->second.state = EXPORT_CANCELLED; | |
311 | } | |
312 | ||
313 | { | |
314 | // unpin bounds | |
315 | set<CDir*> bounds; | |
f67539c2 | 316 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
317 | for (set<CDir*>::iterator q = bounds.begin(); |
318 | q != bounds.end(); | |
319 | ++q) { | |
320 | CDir *bd = *q; | |
321 | bd->put(CDir::PIN_EXPORTBOUND); | |
322 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
323 | } | |
324 | if (state == EXPORT_WARNING) { | |
325 | // notify bystanders | |
b32b8144 | 326 | export_notify_abort(dir, it->second, bounds); |
7c673cae | 327 | // process delayed expires |
f67539c2 | 328 | mdcache->process_delayed_expire(dir); |
7c673cae FG |
329 | } |
330 | } | |
331 | dir->unfreeze_tree(); | |
f67539c2 | 332 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
333 | if (notify_peer && |
334 | (!mds->is_cluster_degraded() || | |
335 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
336 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
337 | it->second.tid), | |
338 | it->second.peer); | |
7c673cae FG |
339 | break; |
340 | ||
341 | case EXPORT_EXPORTING: | |
342 | dout(10) << "export state=exporting : reversing, and unfreezing" << dendl; | |
343 | it->second.state = EXPORT_CANCELLING; | |
b32b8144 | 344 | export_reverse(dir, it->second); |
7c673cae FG |
345 | break; |
346 | ||
347 | case EXPORT_LOGGINGFINISH: | |
348 | case EXPORT_NOTIFYING: | |
349 | dout(10) << "export state=loggingfinish|notifying : ignoring dest failure, we were successful." << dendl; | |
350 | // leave export_state, don't clean up now. | |
351 | break; | |
352 | case EXPORT_CANCELLING: | |
353 | break; | |
354 | ||
355 | default: | |
356 | ceph_abort(); | |
357 | } | |
358 | ||
359 | // finish clean-up? | |
360 | if (it->second.state == EXPORT_CANCELLING || | |
361 | it->second.state == EXPORT_CANCELLED) { | |
362 | MutationRef mut; | |
363 | mut.swap(it->second.mut); | |
364 | ||
365 | if (it->second.state == EXPORT_CANCELLED) { | |
91327a77 | 366 | export_cancel_finish(it); |
7c673cae FG |
367 | } |
368 | ||
369 | // drop locks | |
370 | if (state == EXPORT_LOCKING || state == EXPORT_DISCOVERING) { | |
371 | MDRequestRef mdr = static_cast<MDRequestImpl*>(mut.get()); | |
11fdf7f2 | 372 | ceph_assert(mdr); |
f67539c2 | 373 | mdcache->request_kill(mdr); |
7c673cae FG |
374 | } else if (mut) { |
375 | mds->locker->drop_locks(mut.get()); | |
376 | mut->cleanup(); | |
377 | } | |
378 | ||
f67539c2 | 379 | mdcache->show_subtrees(); |
7c673cae FG |
380 | |
381 | maybe_do_queued_export(); | |
382 | } | |
383 | } | |
384 | ||
91327a77 | 385 | void Migrator::export_cancel_finish(export_state_iterator& it) |
7c673cae | 386 | { |
91327a77 AA |
387 | CDir *dir = it->first; |
388 | bool unpin = (it->second.state == EXPORT_CANCELLING); | |
389 | auto parent = std::move(it->second.parent); | |
390 | ||
391 | total_exporting_size -= it->second.approx_size; | |
392 | export_state.erase(it); | |
393 | ||
11fdf7f2 | 394 | ceph_assert(dir->state_test(CDir::STATE_EXPORTING)); |
1adf2230 | 395 | dir->clear_exporting(); |
7c673cae | 396 | |
91327a77 AA |
397 | if (unpin) { |
398 | // pinned by Migrator::export_notify_abort() | |
399 | dir->auth_unpin(this); | |
400 | } | |
7c673cae | 401 | // send pending import_maps? (these need to go out when all exports have finished.) |
f67539c2 | 402 | mdcache->maybe_send_pending_resolves(); |
91327a77 AA |
403 | |
404 | if (parent) | |
405 | child_export_finish(parent, false); | |
7c673cae FG |
406 | } |
407 | ||
408 | // ========================================================== | |
409 | // mds failure handling | |
410 | ||
411 | void Migrator::handle_mds_failure_or_stop(mds_rank_t who) | |
412 | { | |
9f95a23c | 413 | dout(5) << who << dendl; |
7c673cae FG |
414 | |
415 | // check my exports | |
416 | ||
417 | // first add an extra auth_pin on any freezes, so that canceling a | |
418 | // nested freeze doesn't complete one further up the hierarchy and | |
419 | // confuse the shit out of us. we'll remove it after canceling the | |
420 | // freeze. this way no freeze completions run before we want them | |
421 | // to. | |
9f95a23c | 422 | std::vector<CDir*> pinned_dirs; |
7c673cae FG |
423 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); |
424 | p != export_state.end(); | |
425 | ++p) { | |
426 | if (p->second.state == EXPORT_FREEZING) { | |
427 | CDir *dir = p->first; | |
428 | dout(10) << "adding temp auth_pin on freezing " << *dir << dendl; | |
429 | dir->auth_pin(this); | |
430 | pinned_dirs.push_back(dir); | |
431 | } | |
432 | } | |
433 | ||
434 | map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
435 | while (p != export_state.end()) { | |
436 | map<CDir*,export_state_t>::iterator next = p; | |
437 | ++next; | |
438 | CDir *dir = p->first; | |
439 | ||
440 | // abort exports: | |
441 | // - that are going to the failed node | |
442 | // - that aren't frozen yet (to avoid auth_pin deadlock) | |
443 | // - they havne't prepped yet (they may need to discover bounds to do that) | |
444 | if ((p->second.peer == who && | |
445 | p->second.state != EXPORT_CANCELLING) || | |
446 | p->second.state == EXPORT_LOCKING || | |
447 | p->second.state == EXPORT_DISCOVERING || | |
448 | p->second.state == EXPORT_FREEZING || | |
449 | p->second.state == EXPORT_PREPPING) { | |
450 | // the guy i'm exporting to failed, or we're just freezing. | |
451 | dout(10) << "cleaning up export state (" << p->second.state << ")" | |
452 | << get_export_statename(p->second.state) << " of " << *dir << dendl; | |
453 | export_try_cancel(dir); | |
454 | } else if (p->second.peer != who) { | |
455 | // bystander failed. | |
456 | if (p->second.warning_ack_waiting.erase(who)) { | |
457 | if (p->second.state == EXPORT_WARNING) { | |
458 | p->second.notify_ack_waiting.erase(who); // they won't get a notify either. | |
459 | // exporter waiting for warning acks, let's fake theirs. | |
460 | dout(10) << "faking export_warning_ack from mds." << who | |
461 | << " on " << *dir << " to mds." << p->second.peer | |
462 | << dendl; | |
463 | if (p->second.warning_ack_waiting.empty()) | |
464 | export_go(dir); | |
465 | } | |
466 | } | |
467 | if (p->second.notify_ack_waiting.erase(who)) { | |
468 | // exporter is waiting for notify acks, fake it | |
469 | dout(10) << "faking export_notify_ack from mds." << who | |
470 | << " on " << *dir << " to mds." << p->second.peer | |
471 | << dendl; | |
472 | if (p->second.state == EXPORT_NOTIFYING) { | |
473 | if (p->second.notify_ack_waiting.empty()) | |
474 | export_finish(dir); | |
475 | } else if (p->second.state == EXPORT_CANCELLING) { | |
476 | if (p->second.notify_ack_waiting.empty()) { | |
91327a77 | 477 | export_cancel_finish(p); |
7c673cae FG |
478 | } |
479 | } | |
480 | } | |
481 | } | |
482 | ||
483 | // next! | |
484 | p = next; | |
485 | } | |
486 | ||
487 | ||
488 | // check my imports | |
489 | map<dirfrag_t,import_state_t>::iterator q = import_state.begin(); | |
490 | while (q != import_state.end()) { | |
491 | map<dirfrag_t,import_state_t>::iterator next = q; | |
492 | ++next; | |
493 | dirfrag_t df = q->first; | |
f67539c2 TL |
494 | CInode *diri = mdcache->get_inode(df.ino); |
495 | CDir *dir = mdcache->get_dirfrag(df); | |
7c673cae FG |
496 | |
497 | if (q->second.peer == who) { | |
498 | if (dir) | |
499 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
500 | << get_import_statename(q->second.state) << " of " << *dir << dendl; | |
501 | else | |
502 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
503 | << get_import_statename(q->second.state) << " of " << df << dendl; | |
504 | ||
505 | switch (q->second.state) { | |
506 | case IMPORT_DISCOVERING: | |
507 | dout(10) << "import state=discovering : clearing state" << dendl; | |
508 | import_reverse_discovering(df); | |
509 | break; | |
510 | ||
511 | case IMPORT_DISCOVERED: | |
11fdf7f2 | 512 | ceph_assert(diri); |
7c673cae FG |
513 | dout(10) << "import state=discovered : unpinning inode " << *diri << dendl; |
514 | import_reverse_discovered(df, diri); | |
515 | break; | |
516 | ||
517 | case IMPORT_PREPPING: | |
11fdf7f2 | 518 | ceph_assert(dir); |
7c673cae | 519 | dout(10) << "import state=prepping : unpinning base+bounds " << *dir << dendl; |
b32b8144 | 520 | import_reverse_prepping(dir, q->second); |
7c673cae FG |
521 | break; |
522 | ||
523 | case IMPORT_PREPPED: | |
11fdf7f2 | 524 | ceph_assert(dir); |
7c673cae FG |
525 | dout(10) << "import state=prepped : unpinning base+bounds, unfreezing " << *dir << dendl; |
526 | { | |
527 | set<CDir*> bounds; | |
f67539c2 | 528 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
529 | import_remove_pins(dir, bounds); |
530 | ||
531 | // adjust auth back to the exporter | |
f67539c2 | 532 | mdcache->adjust_subtree_auth(dir, q->second.peer); |
7c673cae FG |
533 | |
534 | // notify bystanders ; wait in aborting state | |
b32b8144 | 535 | q->second.state = IMPORT_ABORTING; |
7c673cae | 536 | import_notify_abort(dir, bounds); |
11fdf7f2 | 537 | ceph_assert(g_conf()->mds_kill_import_at != 10); |
7c673cae FG |
538 | } |
539 | break; | |
540 | ||
541 | case IMPORT_LOGGINGSTART: | |
11fdf7f2 | 542 | ceph_assert(dir); |
7c673cae FG |
543 | dout(10) << "import state=loggingstart : reversing import on " << *dir << dendl; |
544 | import_reverse(dir); | |
545 | break; | |
546 | ||
547 | case IMPORT_ACKING: | |
11fdf7f2 | 548 | ceph_assert(dir); |
7c673cae FG |
549 | // hrm. make this an ambiguous import, and wait for exporter recovery to disambiguate |
550 | dout(10) << "import state=acking : noting ambiguous import " << *dir << dendl; | |
551 | { | |
552 | set<CDir*> bounds; | |
f67539c2 TL |
553 | mdcache->get_subtree_bounds(dir, bounds); |
554 | mdcache->add_ambiguous_import(dir, bounds); | |
7c673cae FG |
555 | } |
556 | break; | |
557 | ||
558 | case IMPORT_FINISHING: | |
11fdf7f2 | 559 | ceph_assert(dir); |
7c673cae FG |
560 | dout(10) << "import state=finishing : finishing import on " << *dir << dendl; |
561 | import_finish(dir, true); | |
562 | break; | |
563 | ||
564 | case IMPORT_ABORTING: | |
11fdf7f2 | 565 | ceph_assert(dir); |
7c673cae FG |
566 | dout(10) << "import state=aborting : ignoring repeat failure " << *dir << dendl; |
567 | break; | |
568 | } | |
569 | } else { | |
570 | auto bystanders_entry = q->second.bystanders.find(who); | |
571 | if (bystanders_entry != q->second.bystanders.end()) { | |
572 | q->second.bystanders.erase(bystanders_entry); | |
573 | if (q->second.state == IMPORT_ABORTING) { | |
11fdf7f2 | 574 | ceph_assert(dir); |
7c673cae FG |
575 | dout(10) << "faking export_notify_ack from mds." << who |
576 | << " on aborting import " << *dir << " from mds." << q->second.peer | |
577 | << dendl; | |
224ce89b | 578 | if (q->second.bystanders.empty()) |
7c673cae | 579 | import_reverse_unfreeze(dir); |
7c673cae FG |
580 | } |
581 | } | |
582 | } | |
583 | ||
584 | // next! | |
585 | q = next; | |
586 | } | |
587 | ||
9f95a23c | 588 | for (const auto& dir : pinned_dirs) { |
7c673cae FG |
589 | dout(10) << "removing temp auth_pin on " << *dir << dendl; |
590 | dir->auth_unpin(this); | |
7c673cae FG |
591 | } |
592 | } | |
593 | ||
594 | ||
595 | ||
596 | void Migrator::show_importing() | |
597 | { | |
9f95a23c | 598 | dout(10) << dendl; |
7c673cae FG |
599 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); |
600 | p != import_state.end(); | |
601 | ++p) { | |
f67539c2 | 602 | CDir *dir = mdcache->get_dirfrag(p->first); |
7c673cae FG |
603 | if (dir) { |
604 | dout(10) << " importing from " << p->second.peer | |
605 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
606 | << " " << p->first << " " << *dir << dendl; | |
607 | } else { | |
608 | dout(10) << " importing from " << p->second.peer | |
609 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
610 | << " " << p->first << dendl; | |
611 | } | |
612 | } | |
613 | } | |
614 | ||
615 | void Migrator::show_exporting() | |
616 | { | |
9f95a23c TL |
617 | dout(10) << dendl; |
618 | for (const auto& [dir, state] : export_state) { | |
619 | dout(10) << " exporting to " << state.peer | |
620 | << ": (" << state.state << ") " << get_export_statename(state.state) | |
621 | << " " << dir->dirfrag() << " " << *dir << dendl; | |
622 | } | |
7c673cae FG |
623 | } |
624 | ||
625 | ||
626 | ||
627 | void Migrator::audit() | |
628 | { | |
11fdf7f2 | 629 | if (!g_conf()->subsys.should_gather<ceph_subsys_mds, 5>()) |
7c673cae FG |
630 | return; // hrm. |
631 | ||
632 | // import_state | |
633 | show_importing(); | |
634 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); | |
635 | p != import_state.end(); | |
636 | ++p) { | |
637 | if (p->second.state == IMPORT_DISCOVERING) | |
638 | continue; | |
639 | if (p->second.state == IMPORT_DISCOVERED) { | |
f67539c2 | 640 | CInode *in = mdcache->get_inode(p->first.ino); |
11fdf7f2 | 641 | ceph_assert(in); |
7c673cae FG |
642 | continue; |
643 | } | |
f67539c2 | 644 | CDir *dir = mdcache->get_dirfrag(p->first); |
11fdf7f2 | 645 | ceph_assert(dir); |
7c673cae FG |
646 | if (p->second.state == IMPORT_PREPPING) |
647 | continue; | |
648 | if (p->second.state == IMPORT_ABORTING) { | |
11fdf7f2 TL |
649 | ceph_assert(!dir->is_ambiguous_dir_auth()); |
650 | ceph_assert(dir->get_dir_auth().first != mds->get_nodeid()); | |
7c673cae FG |
651 | continue; |
652 | } | |
11fdf7f2 TL |
653 | ceph_assert(dir->is_ambiguous_dir_auth()); |
654 | ceph_assert(dir->authority().first == mds->get_nodeid() || | |
7c673cae FG |
655 | dir->authority().second == mds->get_nodeid()); |
656 | } | |
657 | ||
658 | // export_state | |
659 | show_exporting(); | |
660 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
661 | p != export_state.end(); | |
662 | ++p) { | |
663 | CDir *dir = p->first; | |
664 | if (p->second.state == EXPORT_LOCKING || | |
665 | p->second.state == EXPORT_DISCOVERING || | |
666 | p->second.state == EXPORT_FREEZING || | |
667 | p->second.state == EXPORT_CANCELLING) | |
668 | continue; | |
11fdf7f2 TL |
669 | ceph_assert(dir->is_ambiguous_dir_auth()); |
670 | ceph_assert(dir->authority().first == mds->get_nodeid() || | |
7c673cae FG |
671 | dir->authority().second == mds->get_nodeid()); |
672 | } | |
673 | ||
674 | // ambiguous+me subtrees should be importing|exporting | |
675 | ||
676 | // write me | |
677 | } | |
678 | ||
679 | ||
680 | ||
681 | ||
682 | ||
683 | // ========================================================== | |
684 | // EXPORT | |
685 | ||
686 | void Migrator::export_dir_nicely(CDir *dir, mds_rank_t dest) | |
687 | { | |
688 | // enqueue | |
9f95a23c | 689 | dout(7) << *dir << " to " << dest << dendl; |
7c673cae FG |
690 | export_queue.push_back(pair<dirfrag_t,mds_rank_t>(dir->dirfrag(), dest)); |
691 | ||
692 | maybe_do_queued_export(); | |
693 | } | |
694 | ||
695 | void Migrator::maybe_do_queued_export() | |
696 | { | |
697 | static bool running; | |
698 | if (running) | |
699 | return; | |
700 | running = true; | |
91327a77 AA |
701 | |
702 | uint64_t max_total_size = max_export_size * 2; | |
703 | ||
7c673cae | 704 | while (!export_queue.empty() && |
91327a77 AA |
705 | max_total_size > total_exporting_size && |
706 | max_total_size - total_exporting_size >= | |
707 | max_export_size * (num_locking_exports + 1)) { | |
708 | ||
7c673cae FG |
709 | dirfrag_t df = export_queue.front().first; |
710 | mds_rank_t dest = export_queue.front().second; | |
711 | export_queue.pop_front(); | |
712 | ||
f67539c2 | 713 | CDir *dir = mdcache->get_dirfrag(df); |
7c673cae FG |
714 | if (!dir) continue; |
715 | if (!dir->is_auth()) continue; | |
716 | ||
9f95a23c | 717 | dout(7) << "nicely exporting to mds." << dest << " " << *dir << dendl; |
7c673cae FG |
718 | |
719 | export_dir(dir, dest); | |
720 | } | |
91327a77 | 721 | |
7c673cae FG |
722 | running = false; |
723 | } | |
724 | ||
725 | ||
726 | ||
727 | ||
728 | class C_MDC_ExportFreeze : public MigratorContext { | |
9f95a23c | 729 | CDir *dir; // dir i'm exporting |
7c673cae FG |
730 | uint64_t tid; |
731 | public: | |
732 | C_MDC_ExportFreeze(Migrator *m, CDir *e, uint64_t t) : | |
9f95a23c TL |
733 | MigratorContext(m), dir(e), tid(t) { |
734 | dir->get(CDir::PIN_PTRWAITER); | |
735 | } | |
7c673cae FG |
736 | void finish(int r) override { |
737 | if (r >= 0) | |
9f95a23c TL |
738 | mig->export_frozen(dir, tid); |
739 | dir->put(CDir::PIN_PTRWAITER); | |
7c673cae FG |
740 | } |
741 | }; | |
742 | ||
743 | ||
9f95a23c | 744 | bool Migrator::export_try_grab_locks(CDir *dir, MutationRef& mut) |
7c673cae | 745 | { |
9f95a23c | 746 | CInode *diri = dir->get_inode(); |
11fdf7f2 | 747 | |
9f95a23c TL |
748 | if (!diri->filelock.can_wrlock(diri->get_loner()) || |
749 | !diri->nestlock.can_wrlock(diri->get_loner())) | |
750 | return false; | |
11fdf7f2 | 751 | |
9f95a23c | 752 | MutationImpl::LockOpVec lov; |
11fdf7f2 | 753 | |
9f95a23c TL |
754 | set<CDir*> wouldbe_bounds; |
755 | set<CInode*> bound_inodes; | |
f67539c2 | 756 | mdcache->get_wouldbe_subtree_bounds(dir, wouldbe_bounds); |
9f95a23c TL |
757 | for (auto& bound : wouldbe_bounds) |
758 | bound_inodes.insert(bound->get_inode()); | |
759 | for (auto& in : bound_inodes) | |
760 | lov.add_rdlock(&in->dirfragtreelock); | |
761 | ||
762 | lov.add_rdlock(&diri->dirfragtreelock); | |
763 | ||
764 | CInode* in = diri; | |
765 | while (true) { | |
766 | lov.add_rdlock(&in->snaplock); | |
767 | CDentry* pdn = in->get_projected_parent_dn(); | |
768 | if (!pdn) | |
769 | break; | |
770 | in = pdn->get_dir()->get_inode(); | |
771 | } | |
7c673cae | 772 | |
9f95a23c TL |
773 | if (!mds->locker->rdlock_try_set(lov, mut)) |
774 | return false; | |
7c673cae | 775 | |
9f95a23c TL |
776 | mds->locker->wrlock_force(&diri->filelock, mut); |
777 | mds->locker->wrlock_force(&diri->nestlock, mut); | |
11fdf7f2 | 778 | |
9f95a23c | 779 | return true; |
7c673cae FG |
780 | } |
781 | ||
782 | ||
7c673cae FG |
783 | /** export_dir(dir, dest) |
784 | * public method to initiate an export. | |
785 | * will fail if the directory is freezing, frozen, unpinnable, or root. | |
786 | */ | |
787 | void Migrator::export_dir(CDir *dir, mds_rank_t dest) | |
788 | { | |
11fdf7f2 TL |
789 | ceph_assert(dir->is_auth()); |
790 | ceph_assert(dest != mds->get_nodeid()); | |
7c673cae | 791 | |
9f95a23c | 792 | CDir* parent = dir->inode->get_projected_parent_dir(); |
f67539c2 | 793 | if (!mds->is_stopping() && !dir->is_exportable(dest) && dir->get_num_head_items() > 0) { |
9f95a23c | 794 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": dir is export pinned" << dendl; |
81eedcae | 795 | return; |
9f95a23c TL |
796 | } else if (!(mds->is_active() || mds->is_stopping())) { |
797 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": not active" << dendl; | |
181888fb | 798 | return; |
f67539c2 | 799 | } else if (mdcache->is_readonly()) { |
9f95a23c | 800 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": read-only FS, no exports for now" << dendl; |
7c673cae | 801 | return; |
9f95a23c TL |
802 | } else if (!mds->mdsmap->is_active(dest)) { |
803 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": destination not active" << dendl; | |
31f18b77 | 804 | return; |
9f95a23c TL |
805 | } else if (mds->is_cluster_degraded()) { |
806 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": cluster degraded" << dendl; | |
7c673cae | 807 | return; |
9f95a23c TL |
808 | } else if (dir->inode->is_system()) { |
809 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": is a system directory" << dendl; | |
7c673cae | 810 | return; |
9f95a23c TL |
811 | } else if (dir->is_frozen() || dir->is_freezing()) { |
812 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": is frozen" << dendl; | |
7c673cae | 813 | return; |
9f95a23c TL |
814 | } else if (dir->state_test(CDir::STATE_EXPORTING)) { |
815 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": already exporting" << dendl; | |
816 | return; | |
817 | } else if (parent && parent->inode->is_stray() | |
818 | && parent->get_parent_dir()->ino() != MDS_INO_MDSDIR(dest)) { | |
819 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": in stray directory" << dendl; | |
7c673cae FG |
820 | return; |
821 | } | |
822 | ||
9f95a23c | 823 | if (unlikely(g_conf()->mds_thrash_exports)) { |
7c673cae | 824 | // create random subtree bound (which will not be exported) |
9f95a23c | 825 | std::vector<CDir*> ls; |
7c673cae FG |
826 | for (auto p = dir->begin(); p != dir->end(); ++p) { |
827 | auto dn = p->second; | |
828 | CDentry::linkage_t *dnl= dn->get_linkage(); | |
829 | if (dnl->is_primary()) { | |
830 | CInode *in = dnl->get_inode(); | |
9f95a23c TL |
831 | if (in->is_dir()) { |
832 | auto&& dirs = in->get_nested_dirfrags(); | |
833 | ls.insert(std::end(ls), std::begin(dirs), std::end(dirs)); | |
834 | } | |
7c673cae FG |
835 | } |
836 | } | |
837 | if (ls.size() > 0) { | |
838 | int n = rand() % ls.size(); | |
839 | auto p = ls.begin(); | |
840 | while (n--) ++p; | |
841 | CDir *bd = *p; | |
842 | if (!(bd->is_frozen() || bd->is_freezing())) { | |
11fdf7f2 | 843 | ceph_assert(bd->is_auth()); |
7c673cae | 844 | dir->state_set(CDir::STATE_AUXSUBTREE); |
f67539c2 | 845 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid()); |
9f95a23c | 846 | dout(7) << "create aux subtree " << *bd << " under " << *dir << dendl; |
7c673cae FG |
847 | } |
848 | } | |
849 | } | |
850 | ||
9f95a23c TL |
851 | dout(4) << "Starting export to mds." << dest << " " << *dir << dendl; |
852 | ||
11fdf7f2 | 853 | mds->hit_export_target(dest, -1); |
7c673cae FG |
854 | |
855 | dir->auth_pin(this); | |
1adf2230 | 856 | dir->mark_exporting(); |
7c673cae | 857 | |
f67539c2 | 858 | MDRequestRef mdr = mdcache->request_start_internal(CEPH_MDS_OP_EXPORTDIR); |
7c673cae | 859 | mdr->more()->export_dir = dir; |
9f95a23c | 860 | mdr->pin(dir); |
7c673cae | 861 | |
11fdf7f2 | 862 | ceph_assert(export_state.count(dir) == 0); |
7c673cae | 863 | export_state_t& stat = export_state[dir]; |
91327a77 | 864 | num_locking_exports++; |
7c673cae FG |
865 | stat.state = EXPORT_LOCKING; |
866 | stat.peer = dest; | |
867 | stat.tid = mdr->reqid.tid; | |
868 | stat.mut = mdr; | |
869 | ||
f67539c2 | 870 | mdcache->dispatch_request(mdr); |
7c673cae FG |
871 | } |
872 | ||
91327a77 AA |
873 | /* |
874 | * check if directory is too large to be export in whole. If it is, | |
875 | * choose some subdirs, whose total size is suitable. | |
876 | */ | |
877 | void Migrator::maybe_split_export(CDir* dir, uint64_t max_size, bool null_okay, | |
878 | vector<pair<CDir*, size_t> >& results) | |
7c673cae | 879 | { |
91327a77 AA |
880 | static const unsigned frag_size = 800; |
881 | static const unsigned inode_size = 1000; | |
882 | static const unsigned cap_size = 80; | |
883 | static const unsigned remote_size = 10; | |
884 | static const unsigned null_size = 1; | |
885 | ||
886 | // state for depth-first search | |
887 | struct LevelData { | |
888 | CDir *dir; | |
889 | CDir::dentry_key_map::iterator iter; | |
890 | size_t dirfrag_size = frag_size; | |
891 | size_t subdirs_size = 0; | |
892 | bool complete = true; | |
893 | vector<CDir*> siblings; | |
894 | vector<pair<CDir*, size_t> > subdirs; | |
895 | LevelData(const LevelData&) = default; | |
896 | LevelData(CDir *d) : | |
897 | dir(d), iter(d->begin()) {} | |
898 | }; | |
899 | ||
900 | vector<LevelData> stack; | |
901 | stack.emplace_back(dir); | |
902 | ||
903 | size_t found_size = 0; | |
904 | size_t skipped_size = 0; | |
905 | ||
906 | for (;;) { | |
907 | auto& data = stack.back(); | |
908 | CDir *cur = data.dir; | |
909 | auto& it = data.iter; | |
910 | auto& dirfrag_size = data.dirfrag_size; | |
911 | ||
912 | while(it != cur->end()) { | |
913 | CDentry *dn = it->second; | |
914 | ++it; | |
915 | ||
916 | dirfrag_size += dn->name.size(); | |
917 | if (dn->get_linkage()->is_null()) { | |
918 | dirfrag_size += null_size; | |
919 | continue; | |
920 | } | |
921 | if (dn->get_linkage()->is_remote()) { | |
922 | dirfrag_size += remote_size; | |
923 | continue; | |
924 | } | |
925 | ||
926 | CInode *in = dn->get_linkage()->get_inode(); | |
927 | dirfrag_size += inode_size; | |
928 | dirfrag_size += in->get_client_caps().size() * cap_size; | |
929 | ||
930 | if (in->is_dir()) { | |
9f95a23c | 931 | auto ls = in->get_nested_dirfrags(); |
91327a77 AA |
932 | std::reverse(ls.begin(), ls.end()); |
933 | ||
934 | bool complete = true; | |
935 | for (auto p = ls.begin(); p != ls.end(); ) { | |
936 | if ((*p)->state_test(CDir::STATE_EXPORTING) || | |
937 | (*p)->is_freezing_dir() || (*p)->is_frozen_dir()) { | |
938 | complete = false; | |
939 | p = ls.erase(p); | |
940 | } else { | |
941 | ++p; | |
942 | } | |
943 | } | |
944 | if (!complete) { | |
945 | // skip exporting dir's ancestors. because they can't get | |
946 | // frozen (exporting dir's parent inode is auth pinned). | |
947 | for (auto p = stack.rbegin(); p < stack.rend(); ++p) { | |
948 | if (!p->complete) | |
949 | break; | |
950 | p->complete = false; | |
951 | } | |
952 | } | |
953 | if (!ls.empty()) { | |
954 | stack.emplace_back(ls.back()); | |
955 | ls.pop_back(); | |
956 | stack.back().siblings.swap(ls); | |
957 | break; | |
958 | } | |
959 | } | |
960 | } | |
961 | // did above loop push new dirfrag into the stack? | |
962 | if (stack.back().dir != cur) | |
963 | continue; | |
964 | ||
965 | if (data.complete) { | |
966 | auto cur_size = data.subdirs_size + dirfrag_size; | |
967 | // we can do nothing with large dirfrag | |
968 | if (cur_size >= max_size && found_size * 2 > max_size) | |
969 | break; | |
7c673cae | 970 | |
91327a77 AA |
971 | found_size += dirfrag_size; |
972 | ||
973 | if (stack.size() > 1) { | |
974 | auto& parent = stack[stack.size() - 2]; | |
975 | parent.subdirs.emplace_back(cur, cur_size); | |
976 | parent.subdirs_size += cur_size; | |
977 | } | |
978 | } else { | |
979 | // can't merge current dirfrag to its parent if there is skipped subdir | |
980 | results.insert(results.end(), data.subdirs.begin(), data.subdirs.end()); | |
981 | skipped_size += dirfrag_size; | |
982 | } | |
983 | ||
984 | vector<CDir*> ls; | |
985 | ls.swap(data.siblings); | |
986 | ||
987 | stack.pop_back(); | |
988 | if (stack.empty()) | |
989 | break; | |
990 | ||
991 | if (found_size >= max_size) | |
992 | break; | |
993 | ||
994 | // next dirfrag | |
995 | if (!ls.empty()) { | |
996 | stack.emplace_back(ls.back()); | |
997 | ls.pop_back(); | |
998 | stack.back().siblings.swap(ls); | |
999 | } | |
1000 | } | |
1001 | ||
1002 | for (auto& p : stack) | |
1003 | results.insert(results.end(), p.subdirs.begin(), p.subdirs.end()); | |
1004 | ||
1005 | if (results.empty() && (!skipped_size || !null_okay)) | |
1006 | results.emplace_back(dir, found_size + skipped_size); | |
1007 | } | |
1008 | ||
1009 | class C_M_ExportDirWait : public MigratorContext { | |
1010 | MDRequestRef mdr; | |
1011 | int count; | |
1012 | public: | |
1013 | C_M_ExportDirWait(Migrator *m, MDRequestRef mdr, int count) | |
1014 | : MigratorContext(m), mdr(mdr), count(count) {} | |
1015 | void finish(int r) override { | |
1016 | mig->dispatch_export_dir(mdr, count); | |
1017 | } | |
1018 | }; | |
1019 | ||
1020 | void Migrator::dispatch_export_dir(MDRequestRef& mdr, int count) | |
1021 | { | |
7c673cae | 1022 | CDir *dir = mdr->more()->export_dir; |
9f95a23c | 1023 | dout(7) << *mdr << " " << *dir << dendl; |
91327a77 | 1024 | |
7c673cae FG |
1025 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); |
1026 | if (it == export_state.end() || it->second.tid != mdr->reqid.tid) { | |
1027 | // export must have aborted. | |
1028 | dout(7) << "export must have aborted " << *mdr << dendl; | |
11fdf7f2 | 1029 | ceph_assert(mdr->killed || mdr->aborted); |
91327a77 AA |
1030 | if (mdr->aborted) { |
1031 | mdr->aborted = false; | |
f67539c2 | 1032 | mdcache->request_kill(mdr); |
91327a77 | 1033 | } |
7c673cae FG |
1034 | return; |
1035 | } | |
11fdf7f2 | 1036 | ceph_assert(it->second.state == EXPORT_LOCKING); |
7c673cae | 1037 | |
f67539c2 | 1038 | if (mdr->more()->peer_error || dir->is_frozen() || dir->is_freezing()) { |
9f95a23c TL |
1039 | dout(7) << "wouldblock|freezing|frozen, canceling export" << dendl; |
1040 | export_try_cancel(dir); | |
1041 | return; | |
1042 | } | |
7c673cae | 1043 | |
9f95a23c | 1044 | mds_rank_t dest = it->second.peer; |
7c673cae FG |
1045 | if (!mds->is_export_target(dest)) { |
1046 | dout(7) << "dest is not yet an export target" << dendl; | |
1047 | if (count > 3) { | |
9f95a23c | 1048 | dout(7) << "dest has not been added as export target after three MDSMap epochs, canceling export" << dendl; |
7c673cae FG |
1049 | export_try_cancel(dir); |
1050 | return; | |
1051 | } | |
224ce89b WB |
1052 | |
1053 | mds->locker->drop_locks(mdr.get()); | |
1054 | mdr->drop_local_auth_pins(); | |
1055 | ||
31f18b77 | 1056 | mds->wait_for_mdsmap(mds->mdsmap->get_epoch(), new C_M_ExportDirWait(this, mdr, count+1)); |
7c673cae FG |
1057 | return; |
1058 | } | |
1059 | ||
1060 | if (!dir->inode->get_parent_dn()) { | |
1061 | dout(7) << "waiting for dir to become stable before export: " << *dir << dendl; | |
31f18b77 | 1062 | dir->add_waiter(CDir::WAIT_CREATED, new C_M_ExportDirWait(this, mdr, 1)); |
7c673cae FG |
1063 | return; |
1064 | } | |
1065 | ||
7c673cae | 1066 | // locks? |
9f95a23c TL |
1067 | if (!(mdr->locking_state & MutationImpl::ALL_LOCKED)) { |
1068 | MutationImpl::LockOpVec lov; | |
1069 | // If auth MDS of the subtree root inode is neither the exporter MDS | |
1070 | // nor the importer MDS and it gathers subtree root's fragstat/neststat | |
1071 | // while the subtree is exporting. It's possible that the exporter MDS | |
1072 | // and the importer MDS both are auth MDS of the subtree root or both | |
1073 | // are not auth MDS of the subtree root at the time they receive the | |
1074 | // lock messages. So the auth MDS of the subtree root inode may get no | |
1075 | // or duplicated fragstat/neststat for the subtree root dirfrag. | |
1076 | lov.lock_scatter_gather(&dir->get_inode()->filelock); | |
1077 | lov.lock_scatter_gather(&dir->get_inode()->nestlock); | |
1078 | if (dir->get_inode()->is_auth()) { | |
1079 | dir->get_inode()->filelock.set_scatter_wanted(); | |
1080 | dir->get_inode()->nestlock.set_scatter_wanted(); | |
1081 | } | |
1082 | lov.add_rdlock(&dir->get_inode()->dirfragtreelock); | |
1083 | ||
1084 | if (!mds->locker->acquire_locks(mdr, lov, nullptr, true)) { | |
1085 | if (mdr->aborted) | |
1086 | export_try_cancel(dir); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | lov.clear(); | |
1091 | // bound dftlocks: | |
1092 | // NOTE: We need to take an rdlock on bounding dirfrags during | |
1093 | // migration for a rather irritating reason: when we export the | |
1094 | // bound inode, we need to send scatterlock state for the dirfrags | |
1095 | // as well, so that the new auth also gets the correct info. If we | |
1096 | // race with a refragment, this info is useless, as we can't | |
1097 | // redivvy it up. And it's needed for the scatterlocks to work | |
1098 | // properly: when the auth is in a sync/lock state it keeps each | |
1099 | // dirfrag's portion in the local (auth OR replica) dirfrag. | |
1100 | set<CDir*> wouldbe_bounds; | |
1101 | set<CInode*> bound_inodes; | |
f67539c2 | 1102 | mdcache->get_wouldbe_subtree_bounds(dir, wouldbe_bounds); |
9f95a23c TL |
1103 | for (auto& bound : wouldbe_bounds) |
1104 | bound_inodes.insert(bound->get_inode()); | |
1105 | for (auto& in : bound_inodes) | |
1106 | lov.add_rdlock(&in->dirfragtreelock); | |
1107 | ||
1108 | if (!mds->locker->rdlock_try_set(lov, mdr)) | |
1109 | return; | |
1110 | ||
1111 | if (!mds->locker->try_rdlock_snap_layout(dir->get_inode(), mdr)) | |
1112 | return; | |
1113 | ||
1114 | mdr->locking_state |= MutationImpl::ALL_LOCKED; | |
7c673cae FG |
1115 | } |
1116 | ||
11fdf7f2 | 1117 | ceph_assert(g_conf()->mds_kill_export_at != 1); |
7c673cae | 1118 | |
91327a77 AA |
1119 | auto parent = it->second.parent; |
1120 | ||
1121 | vector<pair<CDir*, size_t> > results; | |
1122 | maybe_split_export(dir, max_export_size, (bool)parent, results); | |
1123 | ||
1124 | if (results.size() == 1 && results.front().first == dir) { | |
1125 | num_locking_exports--; | |
1126 | it->second.state = EXPORT_DISCOVERING; | |
1127 | // send ExportDirDiscover (ask target) | |
1128 | filepath path; | |
1129 | dir->inode->make_path(path); | |
9f95a23c TL |
1130 | auto discover = make_message<MExportDirDiscover>(dir->dirfrag(), path, |
1131 | mds->get_nodeid(), | |
1132 | it->second.tid); | |
91327a77 | 1133 | mds->send_message_mds(discover, dest); |
11fdf7f2 | 1134 | ceph_assert(g_conf()->mds_kill_export_at != 2); |
91327a77 AA |
1135 | |
1136 | it->second.last_cum_auth_pins_change = ceph_clock_now(); | |
1137 | it->second.approx_size = results.front().second; | |
91327a77 AA |
1138 | total_exporting_size += it->second.approx_size; |
1139 | ||
1140 | // start the freeze, but hold it up with an auth_pin. | |
1141 | dir->freeze_tree(); | |
11fdf7f2 | 1142 | ceph_assert(dir->is_freezing_tree()); |
91327a77 AA |
1143 | dir->add_waiter(CDir::WAIT_FROZEN, new C_MDC_ExportFreeze(this, dir, it->second.tid)); |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | if (parent) { | |
1148 | parent->pending_children += results.size(); | |
1149 | } else { | |
1150 | parent = std::make_shared<export_base_t>(dir->dirfrag(), dest, | |
1151 | results.size(), export_queue_gen); | |
1152 | } | |
1153 | ||
1154 | if (results.empty()) { | |
1155 | dout(7) << "subtree's children all are under exporting, retry rest parts of parent export " | |
1156 | << parent->dirfrag << dendl; | |
1157 | parent->restart = true; | |
1158 | } else { | |
1159 | dout(7) << "subtree is too large, splitting it into: " << dendl; | |
1160 | } | |
1161 | ||
1162 | for (auto& p : results) { | |
1163 | CDir *sub = p.first; | |
11fdf7f2 | 1164 | ceph_assert(sub != dir); |
91327a77 AA |
1165 | dout(7) << " sub " << *sub << dendl; |
1166 | ||
1167 | sub->auth_pin(this); | |
1168 | sub->mark_exporting(); | |
1169 | ||
f67539c2 | 1170 | MDRequestRef _mdr = mdcache->request_start_internal(CEPH_MDS_OP_EXPORTDIR); |
91327a77 | 1171 | _mdr->more()->export_dir = sub; |
9f95a23c | 1172 | _mdr->pin(sub); |
91327a77 | 1173 | |
11fdf7f2 | 1174 | ceph_assert(export_state.count(sub) == 0); |
91327a77 AA |
1175 | auto& stat = export_state[sub]; |
1176 | num_locking_exports++; | |
1177 | stat.state = EXPORT_LOCKING; | |
1178 | stat.peer = dest; | |
1179 | stat.tid = _mdr->reqid.tid; | |
1180 | stat.mut = _mdr; | |
1181 | stat.parent = parent; | |
f67539c2 | 1182 | mdcache->dispatch_request(_mdr); |
91327a77 AA |
1183 | } |
1184 | ||
1185 | // cancel the original one | |
1186 | export_try_cancel(dir); | |
1187 | } | |
1188 | ||
91327a77 AA |
1189 | void Migrator::child_export_finish(std::shared_ptr<export_base_t>& parent, bool success) |
1190 | { | |
1191 | if (success) | |
1192 | parent->restart = true; | |
1193 | if (--parent->pending_children == 0) { | |
1194 | if (parent->restart && | |
1195 | parent->export_queue_gen == export_queue_gen) { | |
f67539c2 | 1196 | CDir *origin = mdcache->get_dirfrag(parent->dirfrag); |
91327a77 AA |
1197 | if (origin && origin->is_auth()) { |
1198 | dout(7) << "child_export_finish requeue " << *origin << dendl; | |
1199 | export_queue.emplace_front(origin->dirfrag(), parent->dest); | |
1200 | } | |
1201 | } | |
1202 | } | |
7c673cae FG |
1203 | } |
1204 | ||
1205 | /* | |
1206 | * called on receipt of MExportDirDiscoverAck | |
1207 | * the importer now has the directory's _inode_ in memory, and pinned. | |
7c673cae | 1208 | */ |
9f95a23c | 1209 | void Migrator::handle_export_discover_ack(const cref_t<MExportDirDiscoverAck> &m) |
7c673cae | 1210 | { |
f67539c2 | 1211 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1212 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 1213 | ceph_assert(dir); |
7c673cae | 1214 | |
9f95a23c | 1215 | dout(7) << "from " << m->get_source() |
7c673cae FG |
1216 | << " on " << *dir << dendl; |
1217 | ||
11fdf7f2 | 1218 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1219 | |
1220 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1221 | if (it == export_state.end() || | |
1222 | it->second.tid != m->get_tid() || | |
1223 | it->second.peer != dest) { | |
1224 | dout(7) << "must have aborted" << dendl; | |
1225 | } else { | |
11fdf7f2 | 1226 | ceph_assert(it->second.state == EXPORT_DISCOVERING); |
c07f9fc5 FG |
1227 | |
1228 | if (m->is_success()) { | |
1229 | // release locks to avoid deadlock | |
1230 | MDRequestRef mdr = static_cast<MDRequestImpl*>(it->second.mut.get()); | |
11fdf7f2 | 1231 | ceph_assert(mdr); |
f67539c2 | 1232 | mdcache->request_finish(mdr); |
c07f9fc5 FG |
1233 | it->second.mut.reset(); |
1234 | // freeze the subtree | |
1235 | it->second.state = EXPORT_FREEZING; | |
1236 | dir->auth_unpin(this); | |
11fdf7f2 | 1237 | ceph_assert(g_conf()->mds_kill_export_at != 3); |
c07f9fc5 FG |
1238 | |
1239 | } else { | |
1240 | dout(7) << "peer failed to discover (not active?), canceling" << dendl; | |
1241 | export_try_cancel(dir, false); | |
1242 | } | |
7c673cae | 1243 | } |
7c673cae FG |
1244 | } |
1245 | ||
1246 | class C_M_ExportSessionsFlushed : public MigratorContext { | |
1247 | CDir *dir; | |
1248 | uint64_t tid; | |
1249 | public: | |
9f95a23c TL |
1250 | C_M_ExportSessionsFlushed(Migrator *m, CDir *d, uint64_t t) : |
1251 | MigratorContext(m), dir(d), tid(t) { | |
1252 | dir->get(CDir::PIN_PTRWAITER); | |
7c673cae FG |
1253 | } |
1254 | void finish(int r) override { | |
1255 | mig->export_sessions_flushed(dir, tid); | |
9f95a23c | 1256 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
1257 | } |
1258 | }; | |
1259 | ||
1260 | void Migrator::export_sessions_flushed(CDir *dir, uint64_t tid) | |
1261 | { | |
9f95a23c | 1262 | dout(7) << *dir << dendl; |
7c673cae FG |
1263 | |
1264 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1265 | if (it == export_state.end() || | |
1266 | it->second.state == EXPORT_CANCELLING || | |
1267 | it->second.tid != tid) { | |
1268 | // export must have aborted. | |
1269 | dout(7) << "export must have aborted on " << dir << dendl; | |
1270 | return; | |
1271 | } | |
1272 | ||
11fdf7f2 TL |
1273 | ceph_assert(it->second.state == EXPORT_PREPPING || it->second.state == EXPORT_WARNING); |
1274 | ceph_assert(it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0); | |
7c673cae FG |
1275 | it->second.warning_ack_waiting.erase(MDS_RANK_NONE); |
1276 | if (it->second.state == EXPORT_WARNING && it->second.warning_ack_waiting.empty()) | |
1277 | export_go(dir); // start export. | |
1278 | } | |
1279 | ||
9f95a23c TL |
1280 | void Migrator::encode_export_prep_trace(bufferlist &final_bl, CDir *bound, |
1281 | CDir *dir, export_state_t &es, | |
1282 | set<inodeno_t> &inodes_added, | |
1283 | set<dirfrag_t> &dirfrags_added) | |
1284 | { | |
1285 | ENCODE_START(1, 1, final_bl); | |
1286 | ||
1287 | dout(7) << " started to encode dir " << *bound << dendl; | |
1288 | CDir *cur = bound; | |
1289 | bufferlist tracebl; | |
1290 | char start = '-'; | |
1291 | ||
1292 | while (1) { | |
1293 | // don't repeat inodes | |
1294 | if (inodes_added.count(cur->inode->ino())) | |
1295 | break; | |
1296 | inodes_added.insert(cur->inode->ino()); | |
1297 | ||
1298 | // prepend dentry + inode | |
1299 | ceph_assert(cur->inode->is_auth()); | |
1300 | bufferlist bl; | |
f67539c2 | 1301 | mdcache->encode_replica_dentry(cur->inode->parent, es.peer, bl); |
9f95a23c | 1302 | dout(7) << " added " << *cur->inode->parent << dendl; |
f67539c2 | 1303 | mdcache->encode_replica_inode(cur->inode, es.peer, bl, mds->mdsmap->get_up_features()); |
9f95a23c TL |
1304 | dout(7) << " added " << *cur->inode << dendl; |
1305 | bl.claim_append(tracebl); | |
f67539c2 | 1306 | tracebl = std::move(bl); |
9f95a23c TL |
1307 | |
1308 | cur = cur->get_parent_dir(); | |
1309 | // don't repeat dirfrags | |
1310 | if (dirfrags_added.count(cur->dirfrag()) || cur == dir) { | |
1311 | start = 'd'; // start with dentry | |
1312 | break; | |
1313 | } | |
1314 | dirfrags_added.insert(cur->dirfrag()); | |
1315 | ||
1316 | // prepend dir | |
f67539c2 | 1317 | mdcache->encode_replica_dir(cur, es.peer, bl); |
9f95a23c TL |
1318 | dout(7) << " added " << *cur << dendl; |
1319 | bl.claim_append(tracebl); | |
f67539c2 | 1320 | tracebl = std::move(bl); |
9f95a23c TL |
1321 | start = 'f'; // start with dirfrag |
1322 | } | |
1323 | dirfrag_t df = cur->dirfrag(); | |
1324 | encode(df, final_bl); | |
1325 | encode(start, final_bl); | |
1326 | final_bl.claim_append(tracebl); | |
1327 | ||
1328 | ENCODE_FINISH(final_bl); | |
1329 | } | |
1330 | ||
7c673cae FG |
1331 | void Migrator::export_frozen(CDir *dir, uint64_t tid) |
1332 | { | |
9f95a23c | 1333 | dout(7) << *dir << dendl; |
7c673cae FG |
1334 | |
1335 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1336 | if (it == export_state.end() || it->second.tid != tid) { | |
1337 | dout(7) << "export must have aborted" << dendl; | |
1338 | return; | |
1339 | } | |
1340 | ||
11fdf7f2 TL |
1341 | ceph_assert(it->second.state == EXPORT_FREEZING); |
1342 | ceph_assert(dir->is_frozen_tree_root()); | |
7c673cae | 1343 | |
9f95a23c | 1344 | it->second.mut = new MutationImpl(); |
7c673cae FG |
1345 | |
1346 | // ok, try to grab all my locks. | |
9f95a23c | 1347 | CInode *diri = dir->get_inode(); |
7c673cae | 1348 | if ((diri->is_auth() && diri->is_frozen()) || |
9f95a23c | 1349 | !export_try_grab_locks(dir, it->second.mut)) { |
7c673cae FG |
1350 | dout(7) << "export_dir couldn't acquire all needed locks, failing. " |
1351 | << *dir << dendl; | |
91327a77 | 1352 | export_try_cancel(dir); |
7c673cae FG |
1353 | return; |
1354 | } | |
1355 | ||
7c673cae FG |
1356 | if (diri->is_auth()) |
1357 | it->second.mut->auth_pin(diri); | |
7c673cae | 1358 | |
f67539c2 | 1359 | mdcache->show_subtrees(); |
7c673cae | 1360 | |
224ce89b | 1361 | // CDir::_freeze_tree() should have forced it into subtree. |
11fdf7f2 | 1362 | ceph_assert(dir->get_dir_auth() == mds_authority_t(mds->get_nodeid(), mds->get_nodeid())); |
7c673cae | 1363 | // note the bounds. |
7c673cae | 1364 | set<CDir*> bounds; |
f67539c2 | 1365 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1366 | |
1367 | // generate prep message, log entry. | |
9f95a23c | 1368 | auto prep = make_message<MExportDirPrep>(dir->dirfrag(), it->second.tid); |
7c673cae FG |
1369 | |
1370 | // include list of bystanders | |
181888fb FG |
1371 | for (const auto &p : dir->get_replicas()) { |
1372 | if (p.first != it->second.peer) { | |
1373 | dout(10) << "bystander mds." << p.first << dendl; | |
1374 | prep->add_bystander(p.first); | |
7c673cae FG |
1375 | } |
1376 | } | |
1377 | ||
1378 | // include base dirfrag | |
f67539c2 | 1379 | mdcache->encode_replica_dir(dir, it->second.peer, prep->basedir); |
7c673cae FG |
1380 | |
1381 | /* | |
1382 | * include spanning tree for all nested exports. | |
1383 | * these need to be on the destination _before_ the final export so that | |
1384 | * dir_auth updates on any nested exports are properly absorbed. | |
1385 | * this includes inodes and dirfrags included in the subtree, but | |
1386 | * only the inodes at the bounds. | |
1387 | * | |
1388 | * each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
1389 | */ | |
1390 | set<inodeno_t> inodes_added; | |
1391 | set<dirfrag_t> dirfrags_added; | |
1392 | ||
1393 | // check bounds | |
9f95a23c | 1394 | for (auto &bound : bounds){ |
7c673cae | 1395 | // pin it. |
91327a77 AA |
1396 | bound->get(CDir::PIN_EXPORTBOUND); |
1397 | bound->state_set(CDir::STATE_EXPORTBOUND); | |
9f95a23c | 1398 | |
7c673cae FG |
1399 | dout(7) << " export bound " << *bound << dendl; |
1400 | prep->add_bound( bound->dirfrag() ); | |
9f95a23c | 1401 | |
7c673cae | 1402 | bufferlist final_bl; |
9f95a23c | 1403 | encode_export_prep_trace(final_bl, bound, dir, it->second, inodes_added, dirfrags_added); |
7c673cae FG |
1404 | prep->add_trace(final_bl); |
1405 | } | |
1406 | ||
1407 | // send. | |
1408 | it->second.state = EXPORT_PREPPING; | |
1409 | mds->send_message_mds(prep, it->second.peer); | |
11fdf7f2 | 1410 | assert (g_conf()->mds_kill_export_at != 4); |
7c673cae FG |
1411 | |
1412 | // make sure any new instantiations of caps are flushed out | |
11fdf7f2 | 1413 | ceph_assert(it->second.warning_ack_waiting.empty()); |
7c673cae | 1414 | |
91327a77 AA |
1415 | set<client_t> export_client_set; |
1416 | get_export_client_set(dir, export_client_set); | |
1417 | ||
7c673cae FG |
1418 | MDSGatherBuilder gather(g_ceph_context); |
1419 | mds->server->flush_client_sessions(export_client_set, gather); | |
1420 | if (gather.has_subs()) { | |
1421 | it->second.warning_ack_waiting.insert(MDS_RANK_NONE); | |
1422 | gather.set_finisher(new C_M_ExportSessionsFlushed(this, dir, it->second.tid)); | |
1423 | gather.activate(); | |
1424 | } | |
1425 | } | |
1426 | ||
91327a77 | 1427 | void Migrator::get_export_client_set(CDir *dir, set<client_t>& client_set) |
7c673cae | 1428 | { |
91327a77 | 1429 | deque<CDir*> dfs; |
7c673cae FG |
1430 | dfs.push_back(dir); |
1431 | while (!dfs.empty()) { | |
1432 | CDir *dir = dfs.front(); | |
1433 | dfs.pop_front(); | |
91327a77 | 1434 | for (auto& p : *dir) { |
94b18763 | 1435 | CDentry *dn = p.second; |
91327a77 | 1436 | if (!dn->get_linkage()->is_primary()) |
7c673cae FG |
1437 | continue; |
1438 | CInode *in = dn->get_linkage()->get_inode(); | |
1439 | if (in->is_dir()) { | |
1440 | // directory? | |
9f95a23c | 1441 | auto&& ls = in->get_dirfrags(); |
91327a77 AA |
1442 | for (auto& q : ls) { |
1443 | if (!q->state_test(CDir::STATE_EXPORTBOUND)) { | |
7c673cae | 1444 | // include nested dirfrag |
11fdf7f2 | 1445 | ceph_assert(q->get_dir_auth().first == CDIR_AUTH_PARENT); |
91327a77 | 1446 | dfs.push_back(q); // it's ours, recurse (later) |
7c673cae FG |
1447 | } |
1448 | } | |
1449 | } | |
91327a77 AA |
1450 | for (auto& q : in->get_client_caps()) { |
1451 | client_set.insert(q.first); | |
b32b8144 | 1452 | } |
7c673cae FG |
1453 | } |
1454 | } | |
1455 | } | |
1456 | ||
1457 | void Migrator::get_export_client_set(CInode *in, set<client_t>& client_set) | |
1458 | { | |
11fdf7f2 TL |
1459 | for (const auto &p : in->get_client_caps()) { |
1460 | client_set.insert(p.first); | |
1461 | } | |
7c673cae FG |
1462 | } |
1463 | ||
9f95a23c | 1464 | void Migrator::handle_export_prep_ack(const cref_t<MExportDirPrepAck> &m) |
7c673cae | 1465 | { |
f67539c2 | 1466 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1467 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 1468 | ceph_assert(dir); |
7c673cae | 1469 | |
9f95a23c | 1470 | dout(7) << *dir << dendl; |
7c673cae | 1471 | |
11fdf7f2 | 1472 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1473 | |
1474 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1475 | if (it == export_state.end() || | |
1476 | it->second.tid != m->get_tid() || | |
1477 | it->second.peer != mds_rank_t(m->get_source().num())) { | |
1478 | // export must have aborted. | |
1479 | dout(7) << "export must have aborted" << dendl; | |
7c673cae FG |
1480 | return; |
1481 | } | |
11fdf7f2 | 1482 | ceph_assert(it->second.state == EXPORT_PREPPING); |
7c673cae FG |
1483 | |
1484 | if (!m->is_success()) { | |
c07f9fc5 | 1485 | dout(7) << "peer couldn't acquire all needed locks or wasn't active, canceling" << dendl; |
7c673cae | 1486 | export_try_cancel(dir, false); |
7c673cae FG |
1487 | return; |
1488 | } | |
1489 | ||
11fdf7f2 | 1490 | assert (g_conf()->mds_kill_export_at != 5); |
7c673cae FG |
1491 | // send warnings |
1492 | set<CDir*> bounds; | |
f67539c2 | 1493 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae | 1494 | |
11fdf7f2 | 1495 | ceph_assert(it->second.warning_ack_waiting.empty() || |
7c673cae FG |
1496 | (it->second.warning_ack_waiting.size() == 1 && |
1497 | it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0)); | |
11fdf7f2 | 1498 | ceph_assert(it->second.notify_ack_waiting.empty()); |
7c673cae | 1499 | |
181888fb FG |
1500 | for (const auto &p : dir->get_replicas()) { |
1501 | if (p.first == it->second.peer) continue; | |
7c673cae | 1502 | if (mds->is_cluster_degraded() && |
181888fb | 1503 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(p.first)) |
7c673cae | 1504 | continue; // only if active |
181888fb FG |
1505 | it->second.warning_ack_waiting.insert(p.first); |
1506 | it->second.notify_ack_waiting.insert(p.first); // we'll eventually get a notifyack, too! | |
7c673cae | 1507 | |
9f95a23c | 1508 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), it->second.tid, true, |
11fdf7f2 TL |
1509 | mds_authority_t(mds->get_nodeid(),CDIR_AUTH_UNKNOWN), |
1510 | mds_authority_t(mds->get_nodeid(),it->second.peer)); | |
1511 | for (auto &cdir : bounds) { | |
1512 | notify->get_bounds().push_back(cdir->dirfrag()); | |
1513 | } | |
181888fb | 1514 | mds->send_message_mds(notify, p.first); |
7c673cae FG |
1515 | |
1516 | } | |
1517 | ||
1518 | it->second.state = EXPORT_WARNING; | |
1519 | ||
11fdf7f2 | 1520 | ceph_assert(g_conf()->mds_kill_export_at != 6); |
7c673cae FG |
1521 | // nobody to warn? |
1522 | if (it->second.warning_ack_waiting.empty()) | |
1523 | export_go(dir); // start export. | |
7c673cae FG |
1524 | } |
1525 | ||
1526 | ||
1527 | class C_M_ExportGo : public MigratorContext { | |
1528 | CDir *dir; | |
1529 | uint64_t tid; | |
1530 | public: | |
1531 | C_M_ExportGo(Migrator *m, CDir *d, uint64_t t) : | |
1532 | MigratorContext(m), dir(d), tid(t) { | |
9f95a23c TL |
1533 | dir->get(CDir::PIN_PTRWAITER); |
1534 | } | |
7c673cae FG |
1535 | void finish(int r) override { |
1536 | mig->export_go_synced(dir, tid); | |
9f95a23c | 1537 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
1538 | } |
1539 | }; | |
1540 | ||
1541 | void Migrator::export_go(CDir *dir) | |
1542 | { | |
b32b8144 | 1543 | auto it = export_state.find(dir); |
11fdf7f2 | 1544 | ceph_assert(it != export_state.end()); |
9f95a23c | 1545 | dout(7) << *dir << " to " << it->second.peer << dendl; |
7c673cae FG |
1546 | |
1547 | // first sync log to flush out e.g. any cap imports | |
b32b8144 | 1548 | mds->mdlog->wait_for_safe(new C_M_ExportGo(this, dir, it->second.tid)); |
7c673cae FG |
1549 | mds->mdlog->flush(); |
1550 | } | |
1551 | ||
1552 | void Migrator::export_go_synced(CDir *dir, uint64_t tid) | |
1553 | { | |
1554 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1555 | if (it == export_state.end() || | |
1556 | it->second.state == EXPORT_CANCELLING || | |
1557 | it->second.tid != tid) { | |
1558 | // export must have aborted. | |
1559 | dout(7) << "export must have aborted on " << dir << dendl; | |
1560 | return; | |
1561 | } | |
11fdf7f2 | 1562 | ceph_assert(it->second.state == EXPORT_WARNING); |
7c673cae FG |
1563 | mds_rank_t dest = it->second.peer; |
1564 | ||
9f95a23c | 1565 | dout(7) << *dir << " to " << dest << dendl; |
7c673cae | 1566 | |
f67539c2 | 1567 | mdcache->show_subtrees(); |
7c673cae FG |
1568 | |
1569 | it->second.state = EXPORT_EXPORTING; | |
11fdf7f2 | 1570 | ceph_assert(g_conf()->mds_kill_export_at != 7); |
7c673cae | 1571 | |
11fdf7f2 | 1572 | ceph_assert(dir->is_frozen_tree_root()); |
7c673cae FG |
1573 | |
1574 | // set ambiguous auth | |
f67539c2 | 1575 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), dest); |
7c673cae FG |
1576 | |
1577 | // take away the popularity we're sending. | |
11fdf7f2 | 1578 | mds->balancer->subtract_export(dir); |
7c673cae FG |
1579 | |
1580 | // fill export message with cache data | |
9f95a23c | 1581 | auto req = make_message<MExportDir>(dir->dirfrag(), it->second.tid); |
7c673cae | 1582 | map<client_t,entity_inst_t> exported_client_map; |
11fdf7f2 | 1583 | map<client_t,client_metadata_t> exported_client_metadata_map; |
9f95a23c TL |
1584 | uint64_t num_exported_inodes = 0; |
1585 | encode_export_dir(req->export_data, dir, // recur start point | |
1586 | exported_client_map, exported_client_metadata_map, | |
1587 | num_exported_inodes); | |
11fdf7f2 TL |
1588 | encode(exported_client_map, req->client_map, mds->mdsmap->get_up_features()); |
1589 | encode(exported_client_metadata_map, req->client_map); | |
7c673cae FG |
1590 | |
1591 | // add bounds to message | |
1592 | set<CDir*> bounds; | |
f67539c2 | 1593 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1594 | for (set<CDir*>::iterator p = bounds.begin(); |
1595 | p != bounds.end(); | |
1596 | ++p) | |
1597 | req->add_export((*p)->dirfrag()); | |
1598 | ||
1599 | // send | |
1600 | mds->send_message_mds(req, dest); | |
11fdf7f2 | 1601 | ceph_assert(g_conf()->mds_kill_export_at != 8); |
7c673cae | 1602 | |
11fdf7f2 | 1603 | mds->hit_export_target(dest, num_exported_inodes+1); |
7c673cae FG |
1604 | |
1605 | // stats | |
1606 | if (mds->logger) mds->logger->inc(l_mds_exported); | |
1607 | if (mds->logger) mds->logger->inc(l_mds_exported_inodes, num_exported_inodes); | |
1608 | ||
f67539c2 | 1609 | mdcache->show_subtrees(); |
7c673cae FG |
1610 | } |
1611 | ||
1612 | ||
1613 | /** encode_export_inode | |
1614 | * update our local state for this inode to export. | |
1615 | * encode relevant state to be sent over the wire. | |
1616 | * used by: encode_export_dir, file_rename (if foreign) | |
1617 | * | |
1618 | * FIXME: the separation between CInode.encode_export and these methods | |
1619 | * is pretty arbitrary and dumb. | |
1620 | */ | |
1621 | void Migrator::encode_export_inode(CInode *in, bufferlist& enc_state, | |
11fdf7f2 TL |
1622 | map<client_t,entity_inst_t>& exported_client_map, |
1623 | map<client_t,client_metadata_t>& exported_client_metadata_map) | |
7c673cae | 1624 | { |
9f95a23c TL |
1625 | ENCODE_START(1, 1, enc_state); |
1626 | dout(7) << *in << dendl; | |
11fdf7f2 | 1627 | ceph_assert(!in->is_replica(mds->get_nodeid())); |
7c673cae | 1628 | |
f67539c2 | 1629 | encode(in->ino(), enc_state); |
11fdf7f2 | 1630 | encode(in->last, enc_state); |
7c673cae FG |
1631 | in->encode_export(enc_state); |
1632 | ||
1633 | // caps | |
11fdf7f2 | 1634 | encode_export_inode_caps(in, true, enc_state, exported_client_map, exported_client_metadata_map); |
9f95a23c | 1635 | ENCODE_FINISH(enc_state); |
7c673cae FG |
1636 | } |
1637 | ||
1638 | void Migrator::encode_export_inode_caps(CInode *in, bool auth_cap, bufferlist& bl, | |
11fdf7f2 TL |
1639 | map<client_t,entity_inst_t>& exported_client_map, |
1640 | map<client_t,client_metadata_t>& exported_client_metadata_map) | |
7c673cae | 1641 | { |
9f95a23c TL |
1642 | ENCODE_START(1, 1, bl); |
1643 | dout(20) << *in << dendl; | |
7c673cae FG |
1644 | // encode caps |
1645 | map<client_t,Capability::Export> cap_map; | |
1646 | in->export_client_caps(cap_map); | |
11fdf7f2 | 1647 | encode(cap_map, bl); |
7c673cae | 1648 | if (auth_cap) { |
11fdf7f2 | 1649 | encode(in->get_mds_caps_wanted(), bl); |
7c673cae FG |
1650 | |
1651 | in->state_set(CInode::STATE_EXPORTINGCAPS); | |
1652 | in->get(CInode::PIN_EXPORTINGCAPS); | |
1653 | } | |
1654 | ||
1655 | // make note of clients named by exported capabilities | |
11fdf7f2 TL |
1656 | for (const auto &p : in->get_client_caps()) { |
1657 | if (exported_client_map.count(p.first)) | |
1658 | continue; | |
1659 | Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p.first.v)); | |
1660 | exported_client_map[p.first] = session->info.inst; | |
1661 | exported_client_metadata_map[p.first] = session->info.client_metadata; | |
1662 | } | |
9f95a23c | 1663 | ENCODE_FINISH(bl); |
7c673cae FG |
1664 | } |
1665 | ||
1666 | void Migrator::finish_export_inode_caps(CInode *in, mds_rank_t peer, | |
1667 | map<client_t,Capability::Import>& peer_imported) | |
1668 | { | |
9f95a23c | 1669 | dout(20) << *in << dendl; |
7c673cae FG |
1670 | |
1671 | in->state_clear(CInode::STATE_EXPORTINGCAPS); | |
1672 | in->put(CInode::PIN_EXPORTINGCAPS); | |
1673 | ||
1674 | // tell (all) clients about migrating caps.. | |
11fdf7f2 TL |
1675 | for (const auto &p : in->get_client_caps()) { |
1676 | const Capability *cap = &p.second; | |
9f95a23c | 1677 | dout(7) << p.first |
7c673cae | 1678 | << " exported caps on " << *in << dendl; |
9f95a23c TL |
1679 | auto m = make_message<MClientCaps>(CEPH_CAP_OP_EXPORT, in->ino(), 0, |
1680 | cap->get_cap_id(), cap->get_mseq(), | |
1681 | mds->get_osd_epoch_barrier()); | |
11fdf7f2 TL |
1682 | map<client_t,Capability::Import>::iterator q = peer_imported.find(p.first); |
1683 | ceph_assert(q != peer_imported.end()); | |
28e407b8 AA |
1684 | m->set_cap_peer(q->second.cap_id, q->second.issue_seq, q->second.mseq, |
1685 | (q->second.cap_id > 0 ? peer : -1), 0); | |
11fdf7f2 | 1686 | mds->send_message_client_counted(m, p.first); |
7c673cae FG |
1687 | } |
1688 | in->clear_client_caps_after_export(); | |
1689 | mds->locker->eval(in, CEPH_CAP_LOCKS); | |
1690 | } | |
1691 | ||
11fdf7f2 | 1692 | void Migrator::finish_export_inode(CInode *in, mds_rank_t peer, |
7c673cae | 1693 | map<client_t,Capability::Import>& peer_imported, |
11fdf7f2 | 1694 | MDSContext::vec& finished) |
7c673cae | 1695 | { |
9f95a23c | 1696 | dout(12) << *in << dendl; |
7c673cae FG |
1697 | |
1698 | // clean | |
1699 | if (in->is_dirty()) | |
1700 | in->mark_clean(); | |
1701 | ||
1702 | // clear/unpin cached_by (we're no longer the authority) | |
1703 | in->clear_replica_map(); | |
1704 | ||
1705 | // twiddle lock states for auth -> replica transition | |
1706 | in->authlock.export_twiddle(); | |
1707 | in->linklock.export_twiddle(); | |
1708 | in->dirfragtreelock.export_twiddle(); | |
1709 | in->filelock.export_twiddle(); | |
1710 | in->nestlock.export_twiddle(); | |
1711 | in->xattrlock.export_twiddle(); | |
1712 | in->snaplock.export_twiddle(); | |
1713 | in->flocklock.export_twiddle(); | |
1714 | in->policylock.export_twiddle(); | |
1715 | ||
1716 | // mark auth | |
11fdf7f2 | 1717 | ceph_assert(in->is_auth()); |
7c673cae FG |
1718 | in->state_clear(CInode::STATE_AUTH); |
1719 | in->replica_nonce = CInode::EXPORT_NONCE; | |
1720 | ||
1721 | in->clear_dirty_rstat(); | |
1722 | ||
1723 | // no more auth subtree? clear scatter dirty | |
1724 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) | |
1725 | in->clear_scatter_dirty(); | |
1726 | ||
7c673cae FG |
1727 | in->clear_dirty_parent(); |
1728 | ||
f91f0fd5 TL |
1729 | in->clear_clientwriteable(); |
1730 | ||
7c673cae FG |
1731 | in->clear_file_locks(); |
1732 | ||
1733 | // waiters | |
1734 | in->take_waiting(CInode::WAIT_ANY_MASK, finished); | |
1735 | ||
11fdf7f2 | 1736 | in->finish_export(); |
7c673cae FG |
1737 | |
1738 | finish_export_inode_caps(in, peer, peer_imported); | |
7c673cae FG |
1739 | } |
1740 | ||
9f95a23c | 1741 | void Migrator::encode_export_dir(bufferlist& exportbl, |
7c673cae FG |
1742 | CDir *dir, |
1743 | map<client_t,entity_inst_t>& exported_client_map, | |
9f95a23c TL |
1744 | map<client_t,client_metadata_t>& exported_client_metadata_map, |
1745 | uint64_t &num_exported) | |
7c673cae | 1746 | { |
9f95a23c TL |
1747 | // This has to be declared before ENCODE_STARTED as it will need to be referenced after ENCODE_FINISH. |
1748 | std::vector<CDir*> subdirs; | |
1749 | ||
1750 | ENCODE_START(1, 1, exportbl); | |
1751 | dout(7) << *dir << " " << dir->get_num_head_items() << " head items" << dendl; | |
7c673cae | 1752 | |
11fdf7f2 | 1753 | ceph_assert(dir->get_projected_version() == dir->get_version()); |
7c673cae FG |
1754 | |
1755 | #ifdef MDS_VERIFY_FRAGSTAT | |
1756 | if (dir->is_complete()) | |
1757 | dir->verify_fragstat(); | |
1758 | #endif | |
1759 | ||
1760 | // dir | |
1761 | dirfrag_t df = dir->dirfrag(); | |
11fdf7f2 | 1762 | encode(df, exportbl); |
7c673cae FG |
1763 | dir->encode_export(exportbl); |
1764 | ||
1765 | __u32 nden = dir->items.size(); | |
11fdf7f2 | 1766 | encode(nden, exportbl); |
7c673cae FG |
1767 | |
1768 | // dentries | |
94b18763 FG |
1769 | for (auto &p : *dir) { |
1770 | CDentry *dn = p.second; | |
7c673cae | 1771 | CInode *in = dn->get_linkage()->get_inode(); |
7c673cae FG |
1772 | |
1773 | num_exported++; | |
1774 | ||
1775 | // -- dentry | |
9f95a23c | 1776 | dout(7) << " exporting " << *dn << dendl; |
7c673cae FG |
1777 | |
1778 | // dn name | |
11fdf7f2 TL |
1779 | encode(dn->get_name(), exportbl); |
1780 | encode(dn->last, exportbl); | |
7c673cae FG |
1781 | |
1782 | // state | |
1783 | dn->encode_export(exportbl); | |
1784 | ||
1785 | // points to... | |
1786 | ||
1787 | // null dentry? | |
1788 | if (dn->get_linkage()->is_null()) { | |
1789 | exportbl.append("N", 1); // null dentry | |
1790 | continue; | |
1791 | } | |
1792 | ||
1793 | if (dn->get_linkage()->is_remote()) { | |
7c673cae FG |
1794 | inodeno_t ino = dn->get_linkage()->get_remote_ino(); |
1795 | unsigned char d_type = dn->get_linkage()->get_remote_d_type(); | |
f67539c2 TL |
1796 | auto& alternate_name = dn->alternate_name; |
1797 | // remote link | |
1798 | CDentry::encode_remote(ino, d_type, alternate_name, exportbl); | |
7c673cae FG |
1799 | continue; |
1800 | } | |
1801 | ||
1802 | // primary link | |
1803 | // -- inode | |
f67539c2 TL |
1804 | exportbl.append("i", 1); // inode dentry |
1805 | ||
1806 | ENCODE_START(2, 1, exportbl); | |
11fdf7f2 | 1807 | encode_export_inode(in, exportbl, exported_client_map, exported_client_metadata_map); // encode, and (update state for) export |
f67539c2 TL |
1808 | encode(dn->alternate_name, exportbl); |
1809 | ENCODE_FINISH(exportbl); | |
9f95a23c | 1810 | |
7c673cae | 1811 | // directory? |
9f95a23c TL |
1812 | auto&& dfs = in->get_dirfrags(); |
1813 | for (const auto& t : dfs) { | |
7c673cae FG |
1814 | if (!t->state_test(CDir::STATE_EXPORTBOUND)) { |
1815 | // include nested dirfrag | |
11fdf7f2 | 1816 | ceph_assert(t->get_dir_auth().first == CDIR_AUTH_PARENT); |
9f95a23c | 1817 | subdirs.push_back(t); // it's ours, recurse (later) |
7c673cae FG |
1818 | } |
1819 | } | |
1820 | } | |
1821 | ||
9f95a23c | 1822 | ENCODE_FINISH(exportbl); |
7c673cae | 1823 | // subdirs |
9f95a23c TL |
1824 | for (const auto &dir : subdirs) { |
1825 | encode_export_dir(exportbl, dir, exported_client_map, exported_client_metadata_map, num_exported); | |
1826 | } | |
7c673cae FG |
1827 | } |
1828 | ||
11fdf7f2 | 1829 | void Migrator::finish_export_dir(CDir *dir, mds_rank_t peer, |
7c673cae | 1830 | map<inodeno_t,map<client_t,Capability::Import> >& peer_imported, |
11fdf7f2 | 1831 | MDSContext::vec& finished, int *num_dentries) |
7c673cae | 1832 | { |
9f95a23c | 1833 | dout(10) << *dir << dendl; |
7c673cae FG |
1834 | |
1835 | // release open_by | |
1836 | dir->clear_replica_map(); | |
1837 | ||
1838 | // mark | |
11fdf7f2 | 1839 | ceph_assert(dir->is_auth()); |
7c673cae FG |
1840 | dir->state_clear(CDir::STATE_AUTH); |
1841 | dir->remove_bloom(); | |
1842 | dir->replica_nonce = CDir::EXPORT_NONCE; | |
1843 | ||
1844 | if (dir->is_dirty()) | |
1845 | dir->mark_clean(); | |
1846 | ||
1847 | // suck up all waiters | |
1848 | dir->take_waiting(CDir::WAIT_ANY_MASK, finished); // all dir waiters | |
1849 | ||
1850 | // pop | |
11fdf7f2 | 1851 | dir->finish_export(); |
7c673cae FG |
1852 | |
1853 | // dentries | |
9f95a23c | 1854 | std::vector<CDir*> subdirs; |
94b18763 FG |
1855 | for (auto &p : *dir) { |
1856 | CDentry *dn = p.second; | |
7c673cae FG |
1857 | CInode *in = dn->get_linkage()->get_inode(); |
1858 | ||
1859 | // dentry | |
1860 | dn->finish_export(); | |
1861 | ||
1862 | // inode? | |
1863 | if (dn->get_linkage()->is_primary()) { | |
11fdf7f2 | 1864 | finish_export_inode(in, peer, peer_imported[in->ino()], finished); |
7c673cae FG |
1865 | |
1866 | // subdirs? | |
9f95a23c TL |
1867 | auto&& dirs = in->get_nested_dirfrags(); |
1868 | subdirs.insert(std::end(subdirs), std::begin(dirs), std::end(dirs)); | |
7c673cae FG |
1869 | } |
1870 | ||
f67539c2 | 1871 | mdcache->touch_dentry_bottom(dn); // move dentry to tail of LRU |
7c673cae FG |
1872 | ++(*num_dentries); |
1873 | } | |
1874 | ||
1875 | // subdirs | |
9f95a23c TL |
1876 | for (const auto& dir : subdirs) { |
1877 | finish_export_dir(dir, peer, peer_imported, finished, num_dentries); | |
1878 | } | |
7c673cae FG |
1879 | } |
1880 | ||
1881 | class C_MDS_ExportFinishLogged : public MigratorLogContext { | |
1882 | CDir *dir; | |
1883 | public: | |
1884 | C_MDS_ExportFinishLogged(Migrator *m, CDir *d) : MigratorLogContext(m), dir(d) {} | |
1885 | void finish(int r) override { | |
1886 | mig->export_logged_finish(dir); | |
1887 | } | |
1888 | }; | |
1889 | ||
1890 | ||
1891 | /* | |
1892 | * i should get an export_ack from the export target. | |
7c673cae | 1893 | */ |
9f95a23c | 1894 | void Migrator::handle_export_ack(const cref_t<MExportDirAck> &m) |
7c673cae | 1895 | { |
f67539c2 | 1896 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1897 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 TL |
1898 | ceph_assert(dir); |
1899 | ceph_assert(dir->is_frozen_tree_root()); // i'm exporting! | |
7c673cae FG |
1900 | |
1901 | // yay! | |
9f95a23c | 1902 | dout(7) << *dir << dendl; |
7c673cae | 1903 | |
11fdf7f2 | 1904 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1905 | |
1906 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
11fdf7f2 TL |
1907 | ceph_assert(it != export_state.end()); |
1908 | ceph_assert(it->second.state == EXPORT_EXPORTING); | |
1909 | ceph_assert(it->second.tid == m->get_tid()); | |
7c673cae | 1910 | |
11fdf7f2 TL |
1911 | auto bp = m->imported_caps.cbegin(); |
1912 | decode(it->second.peer_imported, bp); | |
7c673cae FG |
1913 | |
1914 | it->second.state = EXPORT_LOGGINGFINISH; | |
11fdf7f2 | 1915 | assert (g_conf()->mds_kill_export_at != 9); |
7c673cae | 1916 | set<CDir*> bounds; |
f67539c2 | 1917 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae | 1918 | |
7c673cae FG |
1919 | // log completion. |
1920 | // include export bounds, to ensure they're in the journal. | |
31f18b77 | 1921 | EExport *le = new EExport(mds->mdlog, dir, it->second.peer);; |
7c673cae FG |
1922 | mds->mdlog->start_entry(le); |
1923 | ||
1924 | le->metablob.add_dir_context(dir, EMetaBlob::TO_ROOT); | |
31f18b77 | 1925 | le->metablob.add_dir(dir, false); |
7c673cae FG |
1926 | for (set<CDir*>::iterator p = bounds.begin(); |
1927 | p != bounds.end(); | |
1928 | ++p) { | |
1929 | CDir *bound = *p; | |
1930 | le->get_bounds().insert(bound->dirfrag()); | |
1931 | le->metablob.add_dir_context(bound); | |
1932 | le->metablob.add_dir(bound, false); | |
1933 | } | |
1934 | ||
31f18b77 FG |
1935 | // list us second, them first. |
1936 | // this keeps authority().first in sync with subtree auth state in the journal. | |
f67539c2 | 1937 | mdcache->adjust_subtree_auth(dir, it->second.peer, mds->get_nodeid()); |
31f18b77 | 1938 | |
7c673cae FG |
1939 | // log export completion, then finish (unfreeze, trigger finish context, etc.) |
1940 | mds->mdlog->submit_entry(le, new C_MDS_ExportFinishLogged(this, dir)); | |
1941 | mds->mdlog->flush(); | |
11fdf7f2 | 1942 | assert (g_conf()->mds_kill_export_at != 10); |
7c673cae FG |
1943 | } |
1944 | ||
b32b8144 | 1945 | void Migrator::export_notify_abort(CDir *dir, export_state_t& stat, set<CDir*>& bounds) |
7c673cae | 1946 | { |
9f95a23c | 1947 | dout(7) << *dir << dendl; |
7c673cae | 1948 | |
11fdf7f2 | 1949 | ceph_assert(stat.state == EXPORT_CANCELLING); |
7c673cae FG |
1950 | |
1951 | if (stat.notify_ack_waiting.empty()) { | |
1952 | stat.state = EXPORT_CANCELLED; | |
1953 | return; | |
1954 | } | |
1955 | ||
1956 | dir->auth_pin(this); | |
1957 | ||
1958 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
1959 | p != stat.notify_ack_waiting.end(); | |
1960 | ++p) { | |
9f95a23c | 1961 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
1962 | pair<int,int>(mds->get_nodeid(), stat.peer), |
1963 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
1964 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
1965 | notify->get_bounds().push_back((*i)->dirfrag()); | |
1966 | mds->send_message_mds(notify, *p); | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | /* | |
1971 | * this happens if hte dest failes after i send teh export data but before it is acked | |
1972 | * that is, we don't know they safely received and logged it, so we reverse our changes | |
1973 | * and go on. | |
1974 | */ | |
b32b8144 | 1975 | void Migrator::export_reverse(CDir *dir, export_state_t& stat) |
7c673cae | 1976 | { |
9f95a23c | 1977 | dout(7) << *dir << dendl; |
7c673cae FG |
1978 | |
1979 | set<CInode*> to_eval; | |
1980 | ||
1981 | set<CDir*> bounds; | |
f67539c2 | 1982 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1983 | |
1984 | // remove exporting pins | |
9f95a23c | 1985 | std::deque<CDir*> rq; |
7c673cae FG |
1986 | rq.push_back(dir); |
1987 | while (!rq.empty()) { | |
1988 | CDir *t = rq.front(); | |
1989 | rq.pop_front(); | |
1990 | t->abort_export(); | |
94b18763 FG |
1991 | for (auto &p : *t) { |
1992 | CDentry *dn = p.second; | |
1993 | dn->abort_export(); | |
1994 | if (!dn->get_linkage()->is_primary()) | |
7c673cae | 1995 | continue; |
94b18763 | 1996 | CInode *in = dn->get_linkage()->get_inode(); |
7c673cae FG |
1997 | in->abort_export(); |
1998 | if (in->state_test(CInode::STATE_EVALSTALECAPS)) { | |
1999 | in->state_clear(CInode::STATE_EVALSTALECAPS); | |
2000 | to_eval.insert(in); | |
2001 | } | |
9f95a23c TL |
2002 | if (in->is_dir()) { |
2003 | auto&& dirs = in->get_nested_dirfrags(); | |
2004 | for (const auto& dir : dirs) { | |
2005 | rq.push_back(dir); | |
2006 | } | |
2007 | } | |
7c673cae FG |
2008 | } |
2009 | } | |
2010 | ||
2011 | // unpin bounds | |
b32b8144 | 2012 | for (auto bd : bounds) { |
7c673cae FG |
2013 | bd->put(CDir::PIN_EXPORTBOUND); |
2014 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
2015 | } | |
2016 | ||
7c673cae | 2017 | // notify bystanders |
b32b8144 | 2018 | export_notify_abort(dir, stat, bounds); |
7c673cae | 2019 | |
224ce89b | 2020 | // unfreeze tree, with possible subtree merge. |
f67539c2 | 2021 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); |
224ce89b | 2022 | |
7c673cae | 2023 | // process delayed expires |
f67539c2 | 2024 | mdcache->process_delayed_expire(dir); |
224ce89b | 2025 | |
7c673cae | 2026 | dir->unfreeze_tree(); |
f67539c2 | 2027 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2028 | |
2029 | // revoke/resume stale caps | |
2030 | for (auto in : to_eval) { | |
2031 | bool need_issue = false; | |
11fdf7f2 TL |
2032 | for (auto &p : in->client_caps) { |
2033 | Capability *cap = &p.second; | |
a8e16298 | 2034 | if (!cap->is_stale()) { |
7c673cae | 2035 | need_issue = true; |
a8e16298 | 2036 | break; |
7c673cae FG |
2037 | } |
2038 | } | |
2039 | if (need_issue && | |
2040 | (!in->is_auth() || !mds->locker->eval(in, CEPH_CAP_LOCKS))) | |
2041 | mds->locker->issue_caps(in); | |
2042 | } | |
2043 | ||
f67539c2 | 2044 | mdcache->show_cache(); |
7c673cae FG |
2045 | } |
2046 | ||
2047 | ||
2048 | /* | |
2049 | * once i get the ack, and logged the EExportFinish(true), | |
2050 | * send notifies (if any), otherwise go straight to finish. | |
2051 | * | |
2052 | */ | |
2053 | void Migrator::export_logged_finish(CDir *dir) | |
2054 | { | |
9f95a23c | 2055 | dout(7) << *dir << dendl; |
7c673cae FG |
2056 | |
2057 | export_state_t& stat = export_state[dir]; | |
2058 | ||
2059 | // send notifies | |
2060 | set<CDir*> bounds; | |
f67539c2 | 2061 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2062 | |
2063 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
2064 | p != stat.notify_ack_waiting.end(); | |
2065 | ++p) { | |
9f95a23c | 2066 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
2067 | pair<int,int>(mds->get_nodeid(), stat.peer), |
2068 | pair<int,int>(stat.peer, CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2069 | |
2070 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) | |
2071 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2072 | ||
2073 | mds->send_message_mds(notify, *p); | |
2074 | } | |
2075 | ||
2076 | // wait for notifyacks | |
2077 | stat.state = EXPORT_NOTIFYING; | |
11fdf7f2 | 2078 | assert (g_conf()->mds_kill_export_at != 11); |
7c673cae FG |
2079 | |
2080 | // no notifies to wait for? | |
2081 | if (stat.notify_ack_waiting.empty()) { | |
2082 | export_finish(dir); // skip notify/notify_ack stage. | |
2083 | } else { | |
2084 | // notify peer to send cap import messages to clients | |
2085 | if (!mds->is_cluster_degraded() || | |
2086 | mds->mdsmap->is_clientreplay_or_active_or_stopping(stat.peer)) { | |
9f95a23c | 2087 | mds->send_message_mds(make_message<MExportDirFinish>(dir->dirfrag(), false, stat.tid), stat.peer); |
7c673cae FG |
2088 | } else { |
2089 | dout(7) << "not sending MExportDirFinish, dest has failed" << dendl; | |
2090 | } | |
2091 | } | |
2092 | } | |
2093 | ||
2094 | /* | |
2095 | * warning: | |
2096 | * i'll get an ack from each bystander. | |
2097 | * when i get them all, do the export. | |
2098 | * notify: | |
2099 | * i'll get an ack from each bystander. | |
2100 | * when i get them all, unfreeze and send the finish. | |
7c673cae | 2101 | */ |
9f95a23c | 2102 | void Migrator::handle_export_notify_ack(const cref_t<MExportDirNotifyAck> &m) |
7c673cae | 2103 | { |
f67539c2 | 2104 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 2105 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 2106 | ceph_assert(dir); |
7c673cae FG |
2107 | mds_rank_t from = mds_rank_t(m->get_source().num()); |
2108 | ||
11fdf7f2 | 2109 | mds->hit_export_target(dest, -1); |
7c673cae FG |
2110 | |
2111 | auto export_state_entry = export_state.find(dir); | |
2112 | if (export_state_entry != export_state.end()) { | |
2113 | export_state_t& stat = export_state_entry->second; | |
2114 | if (stat.state == EXPORT_WARNING && | |
2115 | stat.warning_ack_waiting.erase(from)) { | |
2116 | // exporting. process warning. | |
9f95a23c | 2117 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2118 | << ": exporting, processing warning on " << *dir << dendl; |
2119 | if (stat.warning_ack_waiting.empty()) | |
2120 | export_go(dir); // start export. | |
2121 | } else if (stat.state == EXPORT_NOTIFYING && | |
2122 | stat.notify_ack_waiting.erase(from)) { | |
2123 | // exporting. process notify. | |
9f95a23c | 2124 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2125 | << ": exporting, processing notify on " << *dir << dendl; |
2126 | if (stat.notify_ack_waiting.empty()) | |
2127 | export_finish(dir); | |
2128 | } else if (stat.state == EXPORT_CANCELLING && | |
2129 | m->get_new_auth().second == CDIR_AUTH_UNKNOWN && // not warning ack | |
2130 | stat.notify_ack_waiting.erase(from)) { | |
9f95a23c | 2131 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2132 | << ": cancelling export, processing notify on " << *dir << dendl; |
2133 | if (stat.notify_ack_waiting.empty()) { | |
91327a77 | 2134 | export_cancel_finish(export_state_entry); |
7c673cae FG |
2135 | } |
2136 | } | |
2137 | } | |
2138 | else { | |
2139 | auto import_state_entry = import_state.find(dir->dirfrag()); | |
2140 | if (import_state_entry != import_state.end()) { | |
2141 | import_state_t& stat = import_state_entry->second; | |
2142 | if (stat.state == IMPORT_ABORTING) { | |
2143 | // reversing import | |
9f95a23c | 2144 | dout(7) << "from " << m->get_source() |
7c673cae | 2145 | << ": aborting import on " << *dir << dendl; |
11fdf7f2 | 2146 | ceph_assert(stat.bystanders.count(from)); |
7c673cae FG |
2147 | stat.bystanders.erase(from); |
2148 | if (stat.bystanders.empty()) | |
2149 | import_reverse_unfreeze(dir); | |
2150 | } | |
2151 | } | |
2152 | } | |
7c673cae FG |
2153 | } |
2154 | ||
2155 | void Migrator::export_finish(CDir *dir) | |
2156 | { | |
9f95a23c | 2157 | dout(3) << *dir << dendl; |
7c673cae | 2158 | |
11fdf7f2 | 2159 | assert (g_conf()->mds_kill_export_at != 12); |
7c673cae FG |
2160 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); |
2161 | if (it == export_state.end()) { | |
2162 | dout(7) << "target must have failed, not sending final commit message. export succeeded anyway." << dendl; | |
2163 | return; | |
2164 | } | |
2165 | ||
2166 | // send finish/commit to new auth | |
2167 | if (!mds->is_cluster_degraded() || | |
2168 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer)) { | |
9f95a23c | 2169 | mds->send_message_mds(make_message<MExportDirFinish>(dir->dirfrag(), true, it->second.tid), it->second.peer); |
7c673cae FG |
2170 | } else { |
2171 | dout(7) << "not sending MExportDirFinish last, dest has failed" << dendl; | |
2172 | } | |
11fdf7f2 | 2173 | ceph_assert(g_conf()->mds_kill_export_at != 13); |
7c673cae FG |
2174 | |
2175 | // finish export (adjust local cache state) | |
2176 | int num_dentries = 0; | |
11fdf7f2 TL |
2177 | MDSContext::vec finished; |
2178 | finish_export_dir(dir, it->second.peer, | |
224ce89b WB |
2179 | it->second.peer_imported, finished, &num_dentries); |
2180 | ||
11fdf7f2 | 2181 | ceph_assert(!dir->is_auth()); |
f67539c2 | 2182 | mdcache->adjust_subtree_auth(dir, it->second.peer); |
224ce89b | 2183 | |
7c673cae FG |
2184 | // unpin bounds |
2185 | set<CDir*> bounds; | |
f67539c2 | 2186 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2187 | for (set<CDir*>::iterator p = bounds.begin(); |
2188 | p != bounds.end(); | |
2189 | ++p) { | |
2190 | CDir *bd = *p; | |
2191 | bd->put(CDir::PIN_EXPORTBOUND); | |
2192 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
2193 | } | |
2194 | ||
2195 | if (dir->state_test(CDir::STATE_AUXSUBTREE)) | |
2196 | dir->state_clear(CDir::STATE_AUXSUBTREE); | |
2197 | ||
224ce89b | 2198 | // discard delayed expires |
f67539c2 | 2199 | mdcache->discard_delayed_expire(dir); |
224ce89b | 2200 | |
9f95a23c | 2201 | dout(7) << "unfreezing" << dendl; |
224ce89b WB |
2202 | |
2203 | // unfreeze tree, with possible subtree merge. | |
7c673cae | 2204 | // (we do this _after_ removing EXPORTBOUND pins, to allow merges) |
224ce89b | 2205 | dir->unfreeze_tree(); |
f67539c2 | 2206 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2207 | |
2208 | // no more auth subtree? clear scatter dirty | |
2209 | if (!dir->get_inode()->is_auth() && | |
2210 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2211 | dir->get_inode()->clear_scatter_dirty(); | |
2212 | // wake up scatter_nudge waiters | |
224ce89b | 2213 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, finished); |
7c673cae FG |
2214 | } |
2215 | ||
224ce89b WB |
2216 | if (!finished.empty()) |
2217 | mds->queue_waiters(finished); | |
7c673cae | 2218 | |
91327a77 AA |
2219 | MutationRef mut = std::move(it->second.mut); |
2220 | auto parent = std::move(it->second.parent); | |
7c673cae | 2221 | // remove from exporting list, clean up state |
91327a77 | 2222 | total_exporting_size -= it->second.approx_size; |
7c673cae | 2223 | export_state.erase(it); |
91327a77 | 2224 | |
11fdf7f2 | 2225 | ceph_assert(dir->state_test(CDir::STATE_EXPORTING)); |
1adf2230 | 2226 | dir->clear_exporting(); |
7c673cae | 2227 | |
f67539c2 | 2228 | mdcache->show_subtrees(); |
7c673cae FG |
2229 | audit(); |
2230 | ||
f67539c2 | 2231 | mdcache->trim(num_dentries); // try trimming exported dentries |
7c673cae FG |
2232 | |
2233 | // send pending import_maps? | |
f67539c2 | 2234 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
2235 | |
2236 | // drop locks, unpin path | |
2237 | if (mut) { | |
2238 | mds->locker->drop_locks(mut.get()); | |
2239 | mut->cleanup(); | |
2240 | } | |
91327a77 AA |
2241 | |
2242 | if (parent) | |
2243 | child_export_finish(parent, true); | |
2244 | ||
7c673cae FG |
2245 | maybe_do_queued_export(); |
2246 | } | |
2247 | ||
2248 | ||
2249 | ||
11fdf7f2 TL |
2250 | class C_MDS_ExportDiscover : public MigratorContext { |
2251 | public: | |
9f95a23c | 2252 | C_MDS_ExportDiscover(Migrator *mig, const cref_t<MExportDirDiscover>& m) : MigratorContext(mig), m(m) {} |
11fdf7f2 TL |
2253 | void finish(int r) override { |
2254 | mig->handle_export_discover(m, true); | |
2255 | } | |
2256 | private: | |
9f95a23c | 2257 | cref_t<MExportDirDiscover> m; |
11fdf7f2 | 2258 | }; |
7c673cae | 2259 | |
11fdf7f2 TL |
2260 | class C_MDS_ExportDiscoverFactory : public MDSContextFactory { |
2261 | public: | |
9f95a23c | 2262 | C_MDS_ExportDiscoverFactory(Migrator *mig, cref_t<MExportDirDiscover> m) : mig(mig), m(m) {} |
11fdf7f2 TL |
2263 | MDSContext *build() { |
2264 | return new C_MDS_ExportDiscover(mig, m); | |
2265 | } | |
2266 | private: | |
2267 | Migrator *mig; | |
9f95a23c | 2268 | cref_t<MExportDirDiscover> m; |
11fdf7f2 | 2269 | }; |
7c673cae FG |
2270 | |
2271 | // ========================================================== | |
2272 | // IMPORT | |
2273 | ||
9f95a23c | 2274 | void Migrator::handle_export_discover(const cref_t<MExportDirDiscover> &m, bool started) |
7c673cae FG |
2275 | { |
2276 | mds_rank_t from = m->get_source_mds(); | |
11fdf7f2 | 2277 | ceph_assert(from != mds->get_nodeid()); |
7c673cae | 2278 | |
9f95a23c | 2279 | dout(7) << m->get_path() << dendl; |
7c673cae FG |
2280 | |
2281 | // note import state | |
2282 | dirfrag_t df = m->get_dirfrag(); | |
c07f9fc5 FG |
2283 | |
2284 | if (!mds->is_active()) { | |
2285 | dout(7) << " not active, send NACK " << dendl; | |
9f95a23c | 2286 | mds->send_message_mds(make_message<MExportDirDiscoverAck>(df, m->get_tid(), false), from); |
c07f9fc5 FG |
2287 | return; |
2288 | } | |
2289 | ||
7c673cae | 2290 | // only start discovering on this message once. |
b32b8144 | 2291 | import_state_t *p_state; |
7c673cae | 2292 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); |
11fdf7f2 TL |
2293 | if (!started) { |
2294 | ceph_assert(it == import_state.end()); | |
b32b8144 FG |
2295 | p_state = &import_state[df]; |
2296 | p_state->state = IMPORT_DISCOVERING; | |
2297 | p_state->peer = from; | |
2298 | p_state->tid = m->get_tid(); | |
7c673cae FG |
2299 | } else { |
2300 | // am i retrying after ancient path_traverse results? | |
2301 | if (it == import_state.end() || | |
2302 | it->second.peer != from || | |
2303 | it->second.tid != m->get_tid()) { | |
2304 | dout(7) << " dropping obsolete message" << dendl; | |
7c673cae FG |
2305 | return; |
2306 | } | |
11fdf7f2 | 2307 | ceph_assert(it->second.state == IMPORT_DISCOVERING); |
b32b8144 | 2308 | p_state = &it->second; |
7c673cae FG |
2309 | } |
2310 | ||
11fdf7f2 | 2311 | C_MDS_ExportDiscoverFactory cf(this, m); |
f67539c2 | 2312 | if (!mdcache->is_open()) { |
9f95a23c | 2313 | dout(10) << " waiting for root" << dendl; |
11fdf7f2 | 2314 | mds->mdcache->wait_for_open(cf.build()); |
7c673cae FG |
2315 | return; |
2316 | } | |
2317 | ||
11fdf7f2 | 2318 | assert (g_conf()->mds_kill_import_at != 1); |
7c673cae FG |
2319 | |
2320 | // do we have it? | |
f67539c2 | 2321 | CInode *in = mdcache->get_inode(m->get_dirfrag().ino); |
7c673cae FG |
2322 | if (!in) { |
2323 | // must discover it! | |
2324 | filepath fpath(m->get_path()); | |
2325 | vector<CDentry*> trace; | |
2326 | MDRequestRef null_ref; | |
f67539c2 TL |
2327 | int r = mdcache->path_traverse(null_ref, cf, fpath, |
2328 | MDS_TRAVERSE_DISCOVER | MDS_TRAVERSE_PATH_LOCKED, | |
2329 | &trace); | |
7c673cae FG |
2330 | if (r > 0) return; |
2331 | if (r < 0) { | |
9f95a23c | 2332 | dout(7) << "failed to discover or not dir " << m->get_path() << ", NAK" << dendl; |
7c673cae FG |
2333 | ceph_abort(); // this shouldn't happen if the auth pins its path properly!!!! |
2334 | } | |
2335 | ||
2336 | ceph_abort(); // this shouldn't happen; the get_inode above would have succeeded. | |
2337 | } | |
2338 | ||
2339 | // yay | |
9f95a23c | 2340 | dout(7) << "have " << df << " inode " << *in << dendl; |
7c673cae | 2341 | |
b32b8144 | 2342 | p_state->state = IMPORT_DISCOVERED; |
7c673cae FG |
2343 | |
2344 | // pin inode in the cache (for now) | |
11fdf7f2 | 2345 | ceph_assert(in->is_dir()); |
7c673cae FG |
2346 | in->get(CInode::PIN_IMPORTING); |
2347 | ||
2348 | // reply | |
2349 | dout(7) << " sending export_discover_ack on " << *in << dendl; | |
9f95a23c | 2350 | mds->send_message_mds(make_message<MExportDirDiscoverAck>(df, m->get_tid()), p_state->peer); |
11fdf7f2 | 2351 | assert (g_conf()->mds_kill_import_at != 2); |
7c673cae FG |
2352 | } |
2353 | ||
2354 | void Migrator::import_reverse_discovering(dirfrag_t df) | |
2355 | { | |
2356 | import_state.erase(df); | |
2357 | } | |
2358 | ||
2359 | void Migrator::import_reverse_discovered(dirfrag_t df, CInode *diri) | |
2360 | { | |
2361 | // unpin base | |
2362 | diri->put(CInode::PIN_IMPORTING); | |
2363 | import_state.erase(df); | |
2364 | } | |
2365 | ||
b32b8144 | 2366 | void Migrator::import_reverse_prepping(CDir *dir, import_state_t& stat) |
7c673cae FG |
2367 | { |
2368 | set<CDir*> bounds; | |
f67539c2 | 2369 | mdcache->map_dirfrag_set(stat.bound_ls, bounds); |
7c673cae FG |
2370 | import_remove_pins(dir, bounds); |
2371 | import_reverse_final(dir); | |
2372 | } | |
2373 | ||
9f95a23c | 2374 | void Migrator::handle_export_cancel(const cref_t<MExportDirCancel> &m) |
7c673cae | 2375 | { |
9f95a23c | 2376 | dout(7) << "on " << m->get_dirfrag() << dendl; |
7c673cae FG |
2377 | dirfrag_t df = m->get_dirfrag(); |
2378 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); | |
2379 | if (it == import_state.end()) { | |
11fdf7f2 | 2380 | ceph_abort_msg("got export_cancel in weird state"); |
7c673cae FG |
2381 | } else if (it->second.state == IMPORT_DISCOVERING) { |
2382 | import_reverse_discovering(df); | |
2383 | } else if (it->second.state == IMPORT_DISCOVERED) { | |
f67539c2 | 2384 | CInode *in = mdcache->get_inode(df.ino); |
11fdf7f2 | 2385 | ceph_assert(in); |
7c673cae FG |
2386 | import_reverse_discovered(df, in); |
2387 | } else if (it->second.state == IMPORT_PREPPING) { | |
f67539c2 | 2388 | CDir *dir = mdcache->get_dirfrag(df); |
11fdf7f2 | 2389 | ceph_assert(dir); |
b32b8144 | 2390 | import_reverse_prepping(dir, it->second); |
7c673cae | 2391 | } else if (it->second.state == IMPORT_PREPPED) { |
f67539c2 | 2392 | CDir *dir = mdcache->get_dirfrag(df); |
11fdf7f2 | 2393 | ceph_assert(dir); |
7c673cae | 2394 | set<CDir*> bounds; |
f67539c2 | 2395 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2396 | import_remove_pins(dir, bounds); |
2397 | // adjust auth back to the exportor | |
f67539c2 | 2398 | mdcache->adjust_subtree_auth(dir, it->second.peer); |
7c673cae FG |
2399 | import_reverse_unfreeze(dir); |
2400 | } else { | |
11fdf7f2 | 2401 | ceph_abort_msg("got export_cancel in weird state"); |
7c673cae | 2402 | } |
7c673cae FG |
2403 | } |
2404 | ||
11fdf7f2 TL |
2405 | class C_MDS_ExportPrep : public MigratorContext { |
2406 | public: | |
9f95a23c | 2407 | C_MDS_ExportPrep(Migrator *mig, const cref_t<MExportDirPrep>& m) : MigratorContext(mig), m(m) {} |
11fdf7f2 TL |
2408 | void finish(int r) override { |
2409 | mig->handle_export_prep(m, true); | |
2410 | } | |
2411 | private: | |
9f95a23c | 2412 | cref_t<MExportDirPrep> m; |
11fdf7f2 TL |
2413 | }; |
2414 | ||
2415 | class C_MDS_ExportPrepFactory : public MDSContextFactory { | |
2416 | public: | |
9f95a23c | 2417 | C_MDS_ExportPrepFactory(Migrator *mig, cref_t<MExportDirPrep> m) : mig(mig), m(m) {} |
11fdf7f2 TL |
2418 | MDSContext *build() { |
2419 | return new C_MDS_ExportPrep(mig, m); | |
2420 | } | |
2421 | private: | |
2422 | Migrator *mig; | |
9f95a23c | 2423 | cref_t<MExportDirPrep> m; |
11fdf7f2 TL |
2424 | }; |
2425 | ||
9f95a23c TL |
2426 | void Migrator::decode_export_prep_trace(bufferlist::const_iterator& blp, mds_rank_t oldauth, MDSContext::vec& finished) |
2427 | { | |
2428 | DECODE_START(1, blp); | |
2429 | dirfrag_t df; | |
2430 | decode(df, blp); | |
2431 | char start; | |
2432 | decode(start, blp); | |
2433 | dout(10) << " trace from " << df << " start " << start << dendl; | |
2434 | ||
2435 | CDir *cur = nullptr; | |
2436 | if (start == 'd') { | |
f67539c2 | 2437 | cur = mdcache->get_dirfrag(df); |
9f95a23c TL |
2438 | ceph_assert(cur); |
2439 | dout(10) << " had " << *cur << dendl; | |
2440 | } else if (start == 'f') { | |
f67539c2 | 2441 | CInode *in = mdcache->get_inode(df.ino); |
9f95a23c TL |
2442 | ceph_assert(in); |
2443 | dout(10) << " had " << *in << dendl; | |
f67539c2 | 2444 | mdcache->decode_replica_dir(cur, blp, in, oldauth, finished); |
9f95a23c TL |
2445 | dout(10) << " added " << *cur << dendl; |
2446 | } else if (start == '-') { | |
2447 | // nothing | |
2448 | } else | |
2449 | ceph_abort_msg("unrecognized start char"); | |
2450 | ||
2451 | while (!blp.end()) { | |
2452 | CDentry *dn = nullptr; | |
f67539c2 | 2453 | mdcache->decode_replica_dentry(dn, blp, cur, finished); |
9f95a23c TL |
2454 | dout(10) << " added " << *dn << dendl; |
2455 | CInode *in = nullptr; | |
f67539c2 | 2456 | mdcache->decode_replica_inode(in, blp, dn, finished); |
9f95a23c TL |
2457 | dout(10) << " added " << *in << dendl; |
2458 | if (blp.end()) | |
2459 | break; | |
f67539c2 | 2460 | mdcache->decode_replica_dir(cur, blp, in, oldauth, finished); |
9f95a23c TL |
2461 | dout(10) << " added " << *cur << dendl; |
2462 | } | |
2463 | ||
2464 | DECODE_FINISH(blp); | |
2465 | } | |
2466 | ||
2467 | void Migrator::handle_export_prep(const cref_t<MExportDirPrep> &m, bool did_assim) | |
7c673cae FG |
2468 | { |
2469 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
11fdf7f2 | 2470 | ceph_assert(oldauth != mds->get_nodeid()); |
7c673cae FG |
2471 | |
2472 | CDir *dir; | |
2473 | CInode *diri; | |
11fdf7f2 | 2474 | MDSContext::vec finished; |
7c673cae FG |
2475 | |
2476 | // assimilate root dir. | |
2477 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
11fdf7f2 TL |
2478 | if (!did_assim) { |
2479 | ceph_assert(it != import_state.end()); | |
2480 | ceph_assert(it->second.state == IMPORT_DISCOVERED); | |
2481 | ceph_assert(it->second.peer == oldauth); | |
f67539c2 | 2482 | diri = mdcache->get_inode(m->get_dirfrag().ino); |
11fdf7f2 TL |
2483 | ceph_assert(diri); |
2484 | auto p = m->basedir.cbegin(); | |
f67539c2 | 2485 | mdcache->decode_replica_dir(dir, p, diri, oldauth, finished); |
9f95a23c | 2486 | dout(7) << "on " << *dir << " (first pass)" << dendl; |
7c673cae FG |
2487 | } else { |
2488 | if (it == import_state.end() || | |
2489 | it->second.peer != oldauth || | |
2490 | it->second.tid != m->get_tid()) { | |
9f95a23c | 2491 | dout(7) << "obsolete message, dropping" << dendl; |
7c673cae FG |
2492 | return; |
2493 | } | |
11fdf7f2 TL |
2494 | ceph_assert(it->second.state == IMPORT_PREPPING); |
2495 | ceph_assert(it->second.peer == oldauth); | |
7c673cae | 2496 | |
f67539c2 | 2497 | dir = mdcache->get_dirfrag(m->get_dirfrag()); |
11fdf7f2 | 2498 | ceph_assert(dir); |
9f95a23c | 2499 | dout(7) << "on " << *dir << " (subsequent pass)" << dendl; |
7c673cae FG |
2500 | diri = dir->get_inode(); |
2501 | } | |
11fdf7f2 | 2502 | ceph_assert(dir->is_auth() == false); |
7c673cae | 2503 | |
f67539c2 | 2504 | mdcache->show_subtrees(); |
7c673cae FG |
2505 | |
2506 | // build import bound map | |
2507 | map<inodeno_t, fragset_t> import_bound_fragset; | |
11fdf7f2 TL |
2508 | for (const auto &bound : m->get_bounds()) { |
2509 | dout(10) << " bound " << bound << dendl; | |
9f95a23c | 2510 | import_bound_fragset[bound.ino].insert_raw(bound.frag); |
7c673cae | 2511 | } |
7c673cae | 2512 | // assimilate contents? |
11fdf7f2 | 2513 | if (!did_assim) { |
7c673cae | 2514 | dout(7) << "doing assim on " << *dir << dendl; |
7c673cae FG |
2515 | |
2516 | // change import state | |
2517 | it->second.state = IMPORT_PREPPING; | |
2518 | it->second.bound_ls = m->get_bounds(); | |
2519 | it->second.bystanders = m->get_bystanders(); | |
11fdf7f2 | 2520 | ceph_assert(g_conf()->mds_kill_import_at != 3); |
7c673cae FG |
2521 | |
2522 | // bystander list | |
2523 | dout(7) << "bystanders are " << it->second.bystanders << dendl; | |
2524 | ||
2525 | // move pin to dir | |
2526 | diri->put(CInode::PIN_IMPORTING); | |
2527 | dir->get(CDir::PIN_IMPORTING); | |
2528 | dir->state_set(CDir::STATE_IMPORTING); | |
2529 | ||
2530 | // assimilate traces to exports | |
2531 | // each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
11fdf7f2 | 2532 | for (const auto &bl : m->traces) { |
9f95a23c TL |
2533 | auto blp = bl.cbegin(); |
2534 | decode_export_prep_trace(blp, oldauth, finished); | |
7c673cae FG |
2535 | } |
2536 | ||
2537 | // make bound sticky | |
2538 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2539 | p != import_bound_fragset.end(); | |
2540 | ++p) { | |
9f95a23c | 2541 | p->second.simplify(); |
f67539c2 | 2542 | CInode *in = mdcache->get_inode(p->first); |
11fdf7f2 | 2543 | ceph_assert(in); |
7c673cae FG |
2544 | in->get_stickydirs(); |
2545 | dout(7) << " set stickydirs on bound inode " << *in << dendl; | |
2546 | } | |
2547 | ||
2548 | } else { | |
2549 | dout(7) << " not doing assim on " << *dir << dendl; | |
2550 | } | |
2551 | ||
81eedcae | 2552 | MDSGatherBuilder gather(g_ceph_context); |
11fdf7f2 | 2553 | |
7c673cae FG |
2554 | if (!finished.empty()) |
2555 | mds->queue_waiters(finished); | |
2556 | ||
2557 | ||
c07f9fc5 FG |
2558 | bool success = true; |
2559 | if (mds->is_active()) { | |
2560 | // open all bounds | |
2561 | set<CDir*> import_bounds; | |
2562 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2563 | p != import_bound_fragset.end(); | |
2564 | ++p) { | |
f67539c2 | 2565 | CInode *in = mdcache->get_inode(p->first); |
11fdf7f2 | 2566 | ceph_assert(in); |
7c673cae | 2567 | |
c07f9fc5 | 2568 | // map fragset into a frag_t list, based on the inode fragtree |
11fdf7f2 TL |
2569 | frag_vec_t leaves; |
2570 | for (const auto& frag : p->second) { | |
2571 | in->dirfragtree.get_leaves_under(frag, leaves); | |
2572 | } | |
2573 | dout(10) << " bound inode " << p->first << " fragset " << p->second << " maps to " << leaves << dendl; | |
c07f9fc5 | 2574 | |
11fdf7f2 | 2575 | for (const auto& leaf : leaves) { |
f67539c2 | 2576 | CDir *bound = mdcache->get_dirfrag(dirfrag_t(p->first, leaf)); |
c07f9fc5 | 2577 | if (!bound) { |
11fdf7f2 | 2578 | dout(7) << " opening bounding dirfrag " << leaf << " on " << *in << dendl; |
f67539c2 | 2579 | mdcache->open_remote_dirfrag(in, leaf, gather.new_sub()); |
81eedcae | 2580 | continue; |
c07f9fc5 | 2581 | } |
7c673cae | 2582 | |
c07f9fc5 FG |
2583 | if (!bound->state_test(CDir::STATE_IMPORTBOUND)) { |
2584 | dout(7) << " pinning import bound " << *bound << dendl; | |
2585 | bound->get(CDir::PIN_IMPORTBOUND); | |
2586 | bound->state_set(CDir::STATE_IMPORTBOUND); | |
2587 | } else { | |
2588 | dout(7) << " already pinned import bound " << *bound << dendl; | |
2589 | } | |
2590 | import_bounds.insert(bound); | |
7c673cae | 2591 | } |
7c673cae | 2592 | } |
7c673cae | 2593 | |
81eedcae TL |
2594 | if (gather.has_subs()) { |
2595 | C_MDS_ExportPrepFactory cf(this, m); | |
2596 | gather.set_finisher(cf.build()); | |
2597 | gather.activate(); | |
2598 | return; | |
2599 | } | |
2600 | ||
c07f9fc5 FG |
2601 | dout(7) << " all ready, noting auth and freezing import region" << dendl; |
2602 | ||
f67539c2 | 2603 | if (!mdcache->is_readonly() && |
9f95a23c TL |
2604 | // for pinning scatter gather. loner has a higher chance to get wrlock |
2605 | diri->filelock.can_wrlock(diri->get_loner()) && | |
2606 | diri->nestlock.can_wrlock(diri->get_loner())) { | |
c07f9fc5 FG |
2607 | it->second.mut = new MutationImpl(); |
2608 | // force some locks. hacky. | |
2609 | mds->locker->wrlock_force(&dir->inode->filelock, it->second.mut); | |
2610 | mds->locker->wrlock_force(&dir->inode->nestlock, it->second.mut); | |
2611 | ||
2612 | // note that i am an ambiguous auth for this subtree. | |
2613 | // specify bounds, since the exporter explicitly defines the region. | |
f67539c2 | 2614 | mdcache->adjust_bounded_subtree_auth(dir, import_bounds, |
c07f9fc5 | 2615 | pair<int,int>(oldauth, mds->get_nodeid())); |
f67539c2 | 2616 | mdcache->verify_subtree_bounds(dir, import_bounds); |
c07f9fc5 FG |
2617 | // freeze. |
2618 | dir->_freeze_tree(); | |
2619 | // note new state | |
2620 | it->second.state = IMPORT_PREPPED; | |
2621 | } else { | |
2622 | dout(7) << " couldn't acquire all needed locks, failing. " << *dir << dendl; | |
2623 | success = false; | |
2624 | } | |
7c673cae | 2625 | } else { |
c07f9fc5 | 2626 | dout(7) << " not active, failing. " << *dir << dendl; |
7c673cae | 2627 | success = false; |
7c673cae FG |
2628 | } |
2629 | ||
c07f9fc5 | 2630 | if (!success) |
b32b8144 | 2631 | import_reverse_prepping(dir, it->second); |
c07f9fc5 | 2632 | |
7c673cae FG |
2633 | // ok! |
2634 | dout(7) << " sending export_prep_ack on " << *dir << dendl; | |
9f95a23c | 2635 | mds->send_message(make_message<MExportDirPrepAck>(dir->dirfrag(), success, m->get_tid()), m->get_connection()); |
7c673cae | 2636 | |
11fdf7f2 | 2637 | ceph_assert(g_conf()->mds_kill_import_at != 4); |
7c673cae FG |
2638 | } |
2639 | ||
2640 | ||
2641 | ||
2642 | ||
2643 | class C_MDS_ImportDirLoggedStart : public MigratorLogContext { | |
2644 | dirfrag_t df; | |
2645 | CDir *dir; | |
2646 | mds_rank_t from; | |
2647 | public: | |
28e407b8 | 2648 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae FG |
2649 | |
2650 | C_MDS_ImportDirLoggedStart(Migrator *m, CDir *d, mds_rank_t f) : | |
2651 | MigratorLogContext(m), df(d->dirfrag()), dir(d), from(f) { | |
9f95a23c | 2652 | dir->get(CDir::PIN_PTRWAITER); |
7c673cae FG |
2653 | } |
2654 | void finish(int r) override { | |
28e407b8 | 2655 | mig->import_logged_start(df, dir, from, imported_session_map); |
9f95a23c | 2656 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
2657 | } |
2658 | }; | |
2659 | ||
9f95a23c | 2660 | void Migrator::handle_export_dir(const cref_t<MExportDir> &m) |
7c673cae | 2661 | { |
11fdf7f2 | 2662 | assert (g_conf()->mds_kill_import_at != 5); |
f67539c2 | 2663 | CDir *dir = mdcache->get_dirfrag(m->dirfrag); |
11fdf7f2 | 2664 | ceph_assert(dir); |
31f18b77 FG |
2665 | |
2666 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
9f95a23c | 2667 | dout(7) << "importing " << *dir << " from " << oldauth << dendl; |
31f18b77 | 2668 | |
11fdf7f2 TL |
2669 | ceph_assert(!dir->is_auth()); |
2670 | ceph_assert(dir->freeze_tree_state); | |
7c673cae FG |
2671 | |
2672 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->dirfrag); | |
11fdf7f2 TL |
2673 | ceph_assert(it != import_state.end()); |
2674 | ceph_assert(it->second.state == IMPORT_PREPPED); | |
2675 | ceph_assert(it->second.tid == m->get_tid()); | |
2676 | ceph_assert(it->second.peer == oldauth); | |
7c673cae FG |
2677 | |
2678 | if (!dir->get_inode()->dirfragtree.is_leaf(dir->get_frag())) | |
2679 | dir->get_inode()->dirfragtree.force_to_leaf(g_ceph_context, dir->get_frag()); | |
2680 | ||
f67539c2 | 2681 | mdcache->show_subtrees(); |
7c673cae | 2682 | |
31f18b77 | 2683 | C_MDS_ImportDirLoggedStart *onlogged = new C_MDS_ImportDirLoggedStart(this, dir, oldauth); |
7c673cae FG |
2684 | |
2685 | // start the journal entry | |
31f18b77 | 2686 | EImportStart *le = new EImportStart(mds->mdlog, dir->dirfrag(), m->bounds, oldauth); |
7c673cae FG |
2687 | mds->mdlog->start_entry(le); |
2688 | ||
2689 | le->metablob.add_dir_context(dir); | |
2690 | ||
2691 | // adjust auth (list us _first_) | |
f67539c2 | 2692 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), oldauth); |
7c673cae FG |
2693 | |
2694 | // new client sessions, open these after we journal | |
2695 | // include imported sessions in EImportStart | |
11fdf7f2 | 2696 | auto cmp = m->client_map.cbegin(); |
28e407b8 | 2697 | map<client_t,entity_inst_t> client_map; |
11fdf7f2 | 2698 | map<client_t,client_metadata_t> client_metadata_map; |
28e407b8 | 2699 | decode(client_map, cmp); |
11fdf7f2 TL |
2700 | decode(client_metadata_map, cmp); |
2701 | ceph_assert(cmp.end()); | |
2702 | le->cmapv = mds->server->prepare_force_open_sessions(client_map, client_metadata_map, | |
2703 | onlogged->imported_session_map); | |
28e407b8 | 2704 | encode(client_map, le->client_map, mds->mdsmap->get_up_features()); |
11fdf7f2 | 2705 | encode(client_metadata_map, le->client_map); |
7c673cae | 2706 | |
11fdf7f2 | 2707 | auto blp = m->export_data.cbegin(); |
7c673cae FG |
2708 | int num_imported_inodes = 0; |
2709 | while (!blp.end()) { | |
9f95a23c TL |
2710 | decode_import_dir(blp, |
2711 | oldauth, | |
2712 | dir, // import root | |
2713 | le, | |
2714 | mds->mdlog->get_current_segment(), | |
2715 | it->second.peer_exports, | |
2716 | it->second.updated_scatterlocks, | |
2717 | num_imported_inodes); | |
7c673cae FG |
2718 | } |
2719 | dout(10) << " " << m->bounds.size() << " imported bounds" << dendl; | |
2720 | ||
2721 | // include bounds in EImportStart | |
2722 | set<CDir*> import_bounds; | |
11fdf7f2 | 2723 | for (const auto &bound : m->bounds) { |
f67539c2 | 2724 | CDir *bd = mdcache->get_dirfrag(bound); |
11fdf7f2 | 2725 | ceph_assert(bd); |
7c673cae FG |
2726 | le->metablob.add_dir(bd, false); // note that parent metadata is already in the event |
2727 | import_bounds.insert(bd); | |
2728 | } | |
f67539c2 | 2729 | mdcache->verify_subtree_bounds(dir, import_bounds); |
7c673cae FG |
2730 | |
2731 | // adjust popularity | |
11fdf7f2 | 2732 | mds->balancer->add_import(dir); |
7c673cae | 2733 | |
9f95a23c | 2734 | dout(7) << "did " << *dir << dendl; |
7c673cae FG |
2735 | |
2736 | // note state | |
2737 | it->second.state = IMPORT_LOGGINGSTART; | |
11fdf7f2 | 2738 | assert (g_conf()->mds_kill_import_at != 6); |
7c673cae FG |
2739 | |
2740 | // log it | |
2741 | mds->mdlog->submit_entry(le, onlogged); | |
2742 | mds->mdlog->flush(); | |
2743 | ||
2744 | // some stats | |
2745 | if (mds->logger) { | |
2746 | mds->logger->inc(l_mds_imported); | |
2747 | mds->logger->inc(l_mds_imported_inodes, num_imported_inodes); | |
2748 | } | |
7c673cae FG |
2749 | } |
2750 | ||
2751 | ||
2752 | /* | |
2753 | * this is an import helper | |
2754 | * called by import_finish, and import_reverse and friends. | |
2755 | */ | |
2756 | void Migrator::import_remove_pins(CDir *dir, set<CDir*>& bounds) | |
2757 | { | |
2758 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2759 | // root | |
2760 | dir->put(CDir::PIN_IMPORTING); | |
2761 | dir->state_clear(CDir::STATE_IMPORTING); | |
2762 | ||
2763 | // bounding inodes | |
2764 | set<inodeno_t> did; | |
2765 | for (list<dirfrag_t>::iterator p = stat.bound_ls.begin(); | |
2766 | p != stat.bound_ls.end(); | |
2767 | ++p) { | |
2768 | if (did.count(p->ino)) | |
2769 | continue; | |
2770 | did.insert(p->ino); | |
f67539c2 | 2771 | CInode *in = mdcache->get_inode(p->ino); |
11fdf7f2 | 2772 | ceph_assert(in); |
7c673cae FG |
2773 | in->put_stickydirs(); |
2774 | } | |
2775 | ||
2776 | if (stat.state == IMPORT_PREPPING) { | |
2777 | for (auto bd : bounds) { | |
2778 | if (bd->state_test(CDir::STATE_IMPORTBOUND)) { | |
2779 | bd->put(CDir::PIN_IMPORTBOUND); | |
2780 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2781 | } | |
2782 | } | |
2783 | } else if (stat.state >= IMPORT_PREPPED) { | |
2784 | // bounding dirfrags | |
2785 | for (auto bd : bounds) { | |
11fdf7f2 | 2786 | ceph_assert(bd->state_test(CDir::STATE_IMPORTBOUND)); |
7c673cae FG |
2787 | bd->put(CDir::PIN_IMPORTBOUND); |
2788 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2789 | } | |
2790 | } | |
2791 | } | |
2792 | ||
91327a77 AA |
2793 | class C_MDC_QueueContexts : public MigratorContext { |
2794 | public: | |
11fdf7f2 | 2795 | MDSContext::vec contexts; |
91327a77 AA |
2796 | C_MDC_QueueContexts(Migrator *m) : MigratorContext(m) {} |
2797 | void finish(int r) override { | |
2798 | // execute contexts immediately after 'this' context | |
2799 | get_mds()->queue_waiters_front(contexts); | |
2800 | } | |
2801 | }; | |
7c673cae FG |
2802 | |
2803 | /* | |
2804 | * note: this does teh full work of reversing and import and cleaning up | |
2805 | * state. | |
2806 | * called by both handle_mds_failure and by handle_resolve (if we are | |
2807 | * a survivor coping with an exporter failure+recovery). | |
2808 | */ | |
2809 | void Migrator::import_reverse(CDir *dir) | |
2810 | { | |
9f95a23c | 2811 | dout(7) << *dir << dendl; |
7c673cae FG |
2812 | |
2813 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2814 | stat.state = IMPORT_ABORTING; | |
2815 | ||
2816 | set<CDir*> bounds; | |
f67539c2 | 2817 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2818 | |
2819 | // remove pins | |
2820 | import_remove_pins(dir, bounds); | |
2821 | ||
2822 | // update auth, with possible subtree merge. | |
11fdf7f2 | 2823 | ceph_assert(dir->is_subtree_root()); |
7c673cae | 2824 | if (mds->is_resolve()) |
f67539c2 | 2825 | mdcache->trim_non_auth_subtree(dir); |
7c673cae | 2826 | |
f67539c2 | 2827 | mdcache->adjust_subtree_auth(dir, stat.peer); |
7c673cae | 2828 | |
91327a77 | 2829 | auto fin = new C_MDC_QueueContexts(this); |
7c673cae FG |
2830 | if (!dir->get_inode()->is_auth() && |
2831 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2832 | dir->get_inode()->clear_scatter_dirty(); | |
2833 | // wake up scatter_nudge waiters | |
2834 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2835 | } | |
2836 | ||
2837 | int num_dentries = 0; | |
2838 | // adjust auth bits. | |
9f95a23c | 2839 | std::deque<CDir*> q; |
7c673cae FG |
2840 | q.push_back(dir); |
2841 | while (!q.empty()) { | |
2842 | CDir *cur = q.front(); | |
2843 | q.pop_front(); | |
2844 | ||
2845 | // dir | |
11fdf7f2 | 2846 | cur->abort_import(); |
7c673cae | 2847 | |
94b18763 FG |
2848 | for (auto &p : *cur) { |
2849 | CDentry *dn = p.second; | |
7c673cae FG |
2850 | |
2851 | // dentry | |
2852 | dn->state_clear(CDentry::STATE_AUTH); | |
2853 | dn->clear_replica_map(); | |
2854 | dn->set_replica_nonce(CDentry::EXPORT_NONCE); | |
2855 | if (dn->is_dirty()) | |
2856 | dn->mark_clean(); | |
2857 | ||
2858 | // inode? | |
2859 | if (dn->get_linkage()->is_primary()) { | |
2860 | CInode *in = dn->get_linkage()->get_inode(); | |
2861 | in->state_clear(CDentry::STATE_AUTH); | |
2862 | in->clear_replica_map(); | |
2863 | in->set_replica_nonce(CInode::EXPORT_NONCE); | |
2864 | if (in->is_dirty()) | |
2865 | in->mark_clean(); | |
2866 | in->clear_dirty_rstat(); | |
2867 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2868 | in->clear_scatter_dirty(); | |
2869 | in->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2870 | } | |
2871 | ||
2872 | in->clear_dirty_parent(); | |
2873 | ||
f91f0fd5 TL |
2874 | in->clear_clientwriteable(); |
2875 | in->state_clear(CInode::STATE_NEEDSRECOVER); | |
2876 | ||
7c673cae FG |
2877 | in->authlock.clear_gather(); |
2878 | in->linklock.clear_gather(); | |
2879 | in->dirfragtreelock.clear_gather(); | |
2880 | in->filelock.clear_gather(); | |
2881 | ||
2882 | in->clear_file_locks(); | |
2883 | ||
2884 | // non-bounding dir? | |
9f95a23c TL |
2885 | auto&& dfs = in->get_dirfrags(); |
2886 | for (const auto& dir : dfs) { | |
2887 | if (bounds.count(dir) == 0) | |
2888 | q.push_back(dir); | |
2889 | } | |
7c673cae FG |
2890 | } |
2891 | ||
f67539c2 | 2892 | mdcache->touch_dentry_bottom(dn); // move dentry to tail of LRU |
7c673cae FG |
2893 | ++num_dentries; |
2894 | } | |
2895 | } | |
2896 | ||
2897 | dir->add_waiter(CDir::WAIT_UNFREEZE, fin); | |
2898 | ||
2899 | if (stat.state == IMPORT_ACKING) { | |
2900 | // remove imported caps | |
2901 | for (map<CInode*,map<client_t,Capability::Export> >::iterator p = stat.peer_exports.begin(); | |
28e407b8 AA |
2902 | p != stat.peer_exports.end(); |
2903 | ++p) { | |
7c673cae FG |
2904 | CInode *in = p->first; |
2905 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); | |
28e407b8 AA |
2906 | q != p->second.end(); |
2907 | ++q) { | |
7c673cae | 2908 | Capability *cap = in->get_client_cap(q->first); |
28e407b8 | 2909 | if (!cap) { |
11fdf7f2 | 2910 | ceph_assert(!stat.session_map.count(q->first)); |
28e407b8 AA |
2911 | continue; |
2912 | } | |
7c673cae FG |
2913 | if (cap->is_importing()) |
2914 | in->remove_client_cap(q->first); | |
f91f0fd5 TL |
2915 | else |
2916 | cap->clear_clientwriteable(); | |
7c673cae FG |
2917 | } |
2918 | in->put(CInode::PIN_IMPORTINGCAPS); | |
2919 | } | |
28e407b8 AA |
2920 | for (auto& p : stat.session_map) { |
2921 | Session *session = p.second.first; | |
7c673cae FG |
2922 | session->dec_importing(); |
2923 | } | |
2924 | } | |
2925 | ||
2926 | // log our failure | |
2927 | mds->mdlog->start_submit_entry(new EImportFinish(dir, false)); // log failure | |
2928 | ||
f67539c2 | 2929 | mdcache->trim(num_dentries); // try trimming dentries |
7c673cae FG |
2930 | |
2931 | // notify bystanders; wait in aborting state | |
2932 | import_notify_abort(dir, bounds); | |
2933 | } | |
2934 | ||
2935 | void Migrator::import_notify_finish(CDir *dir, set<CDir*>& bounds) | |
2936 | { | |
9f95a23c | 2937 | dout(7) << *dir << dendl; |
7c673cae FG |
2938 | |
2939 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2940 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2941 | p != stat.bystanders.end(); | |
2942 | ++p) { | |
9f95a23c | 2943 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, false, |
11fdf7f2 TL |
2944 | pair<int,int>(stat.peer, mds->get_nodeid()), |
2945 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2946 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
2947 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2948 | mds->send_message_mds(notify, *p); | |
2949 | } | |
2950 | } | |
2951 | ||
2952 | void Migrator::import_notify_abort(CDir *dir, set<CDir*>& bounds) | |
2953 | { | |
9f95a23c | 2954 | dout(7) << *dir << dendl; |
7c673cae FG |
2955 | |
2956 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2957 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2958 | p != stat.bystanders.end(); ) { | |
2959 | if (mds->is_cluster_degraded() && | |
2960 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(*p)) { | |
2961 | // this can happen if both exporter and bystander fail in the same mdsmap epoch | |
2962 | stat.bystanders.erase(p++); | |
2963 | continue; | |
2964 | } | |
9f95a23c | 2965 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
2966 | mds_authority_t(stat.peer, mds->get_nodeid()), |
2967 | mds_authority_t(stat.peer, CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2968 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
2969 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2970 | mds->send_message_mds(notify, *p); | |
2971 | ++p; | |
2972 | } | |
2973 | if (stat.bystanders.empty()) { | |
2974 | dout(7) << "no bystanders, finishing reverse now" << dendl; | |
2975 | import_reverse_unfreeze(dir); | |
2976 | } else { | |
11fdf7f2 | 2977 | assert (g_conf()->mds_kill_import_at != 10); |
7c673cae FG |
2978 | } |
2979 | } | |
2980 | ||
2981 | void Migrator::import_reverse_unfreeze(CDir *dir) | |
2982 | { | |
9f95a23c | 2983 | dout(7) << *dir << dendl; |
11fdf7f2 | 2984 | ceph_assert(!dir->is_auth()); |
f67539c2 | 2985 | mdcache->discard_delayed_expire(dir); |
224ce89b WB |
2986 | dir->unfreeze_tree(); |
2987 | if (dir->is_subtree_root()) | |
f67539c2 | 2988 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2989 | import_reverse_final(dir); |
2990 | } | |
2991 | ||
2992 | void Migrator::import_reverse_final(CDir *dir) | |
2993 | { | |
9f95a23c | 2994 | dout(7) << *dir << dendl; |
7c673cae FG |
2995 | |
2996 | // clean up | |
2997 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
11fdf7f2 | 2998 | ceph_assert(it != import_state.end()); |
7c673cae FG |
2999 | |
3000 | MutationRef mut = it->second.mut; | |
3001 | import_state.erase(it); | |
3002 | ||
3003 | // send pending import_maps? | |
f67539c2 | 3004 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
3005 | |
3006 | if (mut) { | |
3007 | mds->locker->drop_locks(mut.get()); | |
3008 | mut->cleanup(); | |
3009 | } | |
3010 | ||
f67539c2 | 3011 | mdcache->show_subtrees(); |
7c673cae FG |
3012 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) |
3013 | } | |
3014 | ||
3015 | ||
3016 | ||
3017 | ||
3018 | void Migrator::import_logged_start(dirfrag_t df, CDir *dir, mds_rank_t from, | |
28e407b8 | 3019 | map<client_t,pair<Session*,uint64_t> >& imported_session_map) |
7c673cae | 3020 | { |
9f95a23c TL |
3021 | dout(7) << *dir << dendl; |
3022 | ||
7c673cae FG |
3023 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); |
3024 | if (it == import_state.end() || | |
3025 | it->second.state != IMPORT_LOGGINGSTART) { | |
3026 | dout(7) << "import " << df << " must have aborted" << dendl; | |
28e407b8 | 3027 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae FG |
3028 | return; |
3029 | } | |
3030 | ||
7c673cae FG |
3031 | // note state |
3032 | it->second.state = IMPORT_ACKING; | |
3033 | ||
11fdf7f2 | 3034 | assert (g_conf()->mds_kill_import_at != 7); |
7c673cae FG |
3035 | |
3036 | // force open client sessions and finish cap import | |
28e407b8 | 3037 | mds->server->finish_force_open_sessions(imported_session_map, false); |
7c673cae FG |
3038 | |
3039 | map<inodeno_t,map<client_t,Capability::Import> > imported_caps; | |
3040 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
3041 | p != it->second.peer_exports.end(); | |
3042 | ++p) { | |
3043 | // parameter 'peer' is NONE, delay sending cap import messages to client | |
28e407b8 AA |
3044 | finish_import_inode_caps(p->first, MDS_RANK_NONE, true, imported_session_map, |
3045 | p->second, imported_caps[p->first->ino()]); | |
7c673cae | 3046 | } |
28e407b8 AA |
3047 | |
3048 | it->second.session_map.swap(imported_session_map); | |
7c673cae FG |
3049 | |
3050 | // send notify's etc. | |
3051 | dout(7) << "sending ack for " << *dir << " to old auth mds." << from << dendl; | |
3052 | ||
3053 | // test surviving observer of a failed migration that did not complete | |
3054 | //assert(dir->replica_map.size() < 2 || mds->get_nodeid() != 0); | |
3055 | ||
9f95a23c | 3056 | auto ack = make_message<MExportDirAck>(dir->dirfrag(), it->second.tid); |
11fdf7f2 | 3057 | encode(imported_caps, ack->imported_caps); |
7c673cae FG |
3058 | |
3059 | mds->send_message_mds(ack, from); | |
11fdf7f2 | 3060 | assert (g_conf()->mds_kill_import_at != 8); |
7c673cae | 3061 | |
f67539c2 | 3062 | mdcache->show_subtrees(); |
7c673cae FG |
3063 | } |
3064 | ||
9f95a23c | 3065 | void Migrator::handle_export_finish(const cref_t<MExportDirFinish> &m) |
7c673cae | 3066 | { |
f67539c2 | 3067 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
11fdf7f2 | 3068 | ceph_assert(dir); |
9f95a23c | 3069 | dout(7) << *dir << (m->is_last() ? " last" : "") << dendl; |
7c673cae FG |
3070 | |
3071 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
11fdf7f2 TL |
3072 | ceph_assert(it != import_state.end()); |
3073 | ceph_assert(it->second.tid == m->get_tid()); | |
7c673cae FG |
3074 | |
3075 | import_finish(dir, false, m->is_last()); | |
7c673cae FG |
3076 | } |
3077 | ||
3078 | void Migrator::import_finish(CDir *dir, bool notify, bool last) | |
3079 | { | |
9f95a23c | 3080 | dout(7) << *dir << dendl; |
7c673cae FG |
3081 | |
3082 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
11fdf7f2 TL |
3083 | ceph_assert(it != import_state.end()); |
3084 | ceph_assert(it->second.state == IMPORT_ACKING || it->second.state == IMPORT_FINISHING); | |
7c673cae | 3085 | |
224ce89b | 3086 | if (it->second.state == IMPORT_ACKING) { |
11fdf7f2 | 3087 | ceph_assert(dir->is_auth()); |
f67539c2 | 3088 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); |
224ce89b WB |
3089 | } |
3090 | ||
7c673cae | 3091 | // log finish |
11fdf7f2 | 3092 | ceph_assert(g_conf()->mds_kill_import_at != 9); |
7c673cae FG |
3093 | |
3094 | if (it->second.state == IMPORT_ACKING) { | |
3095 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
3096 | p != it->second.peer_exports.end(); | |
3097 | ++p) { | |
3098 | CInode *in = p->first; | |
11fdf7f2 | 3099 | ceph_assert(in->is_auth()); |
7c673cae FG |
3100 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); |
3101 | q != p->second.end(); | |
3102 | ++q) { | |
28e407b8 AA |
3103 | auto r = it->second.session_map.find(q->first); |
3104 | if (r == it->second.session_map.end()) | |
3105 | continue; | |
3106 | ||
3107 | Session *session = r->second.first; | |
7c673cae | 3108 | Capability *cap = in->get_client_cap(q->first); |
11fdf7f2 | 3109 | ceph_assert(cap); |
7c673cae FG |
3110 | cap->merge(q->second, true); |
3111 | cap->clear_importing(); | |
f67539c2 | 3112 | mdcache->do_cap_import(session, in, cap, q->second.cap_id, q->second.seq, |
7c673cae FG |
3113 | q->second.mseq - 1, it->second.peer, CEPH_CAP_FLAG_AUTH); |
3114 | } | |
3115 | p->second.clear(); | |
3116 | in->replica_caps_wanted = 0; | |
3117 | } | |
28e407b8 AA |
3118 | for (auto& p : it->second.session_map) { |
3119 | Session *session = p.second.first; | |
7c673cae FG |
3120 | session->dec_importing(); |
3121 | } | |
3122 | } | |
3123 | ||
3124 | if (!last) { | |
11fdf7f2 | 3125 | ceph_assert(it->second.state == IMPORT_ACKING); |
7c673cae FG |
3126 | it->second.state = IMPORT_FINISHING; |
3127 | return; | |
3128 | } | |
3129 | ||
3130 | // remove pins | |
3131 | set<CDir*> bounds; | |
f67539c2 | 3132 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
3133 | |
3134 | if (notify) | |
3135 | import_notify_finish(dir, bounds); | |
3136 | ||
3137 | import_remove_pins(dir, bounds); | |
3138 | ||
3139 | map<CInode*, map<client_t,Capability::Export> > peer_exports; | |
3140 | it->second.peer_exports.swap(peer_exports); | |
3141 | ||
3142 | // clear import state (we're done!) | |
3143 | MutationRef mut = it->second.mut; | |
3144 | import_state.erase(it); | |
3145 | ||
7c673cae FG |
3146 | mds->mdlog->start_submit_entry(new EImportFinish(dir, true)); |
3147 | ||
7c673cae | 3148 | // process delayed expires |
f67539c2 | 3149 | mdcache->process_delayed_expire(dir); |
7c673cae | 3150 | |
224ce89b | 3151 | // unfreeze tree, with possible subtree merge. |
7c673cae | 3152 | dir->unfreeze_tree(); |
f67539c2 | 3153 | mdcache->try_subtree_merge(dir); |
224ce89b | 3154 | |
f67539c2 | 3155 | mdcache->show_subtrees(); |
7c673cae FG |
3156 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) |
3157 | ||
3158 | if (mut) { | |
3159 | mds->locker->drop_locks(mut.get()); | |
3160 | mut->cleanup(); | |
3161 | } | |
3162 | ||
3163 | // re-eval imported caps | |
3164 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = peer_exports.begin(); | |
3165 | p != peer_exports.end(); | |
3166 | ++p) { | |
3167 | if (p->first->is_auth()) | |
3168 | mds->locker->eval(p->first, CEPH_CAP_LOCKS, true); | |
3169 | p->first->put(CInode::PIN_IMPORTINGCAPS); | |
3170 | } | |
3171 | ||
3172 | // send pending import_maps? | |
f67539c2 | 3173 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
3174 | |
3175 | // did i just import mydir? | |
3176 | if (dir->ino() == MDS_INO_MDSDIR(mds->get_nodeid())) | |
f67539c2 | 3177 | mdcache->populate_mydir(); |
7c673cae FG |
3178 | |
3179 | // is it empty? | |
3180 | if (dir->get_num_head_items() == 0 && | |
3181 | !dir->inode->is_auth()) { | |
3182 | // reexport! | |
3183 | export_empty_import(dir); | |
3184 | } | |
3185 | } | |
3186 | ||
11fdf7f2 | 3187 | void Migrator::decode_import_inode(CDentry *dn, bufferlist::const_iterator& blp, |
7c673cae FG |
3188 | mds_rank_t oldauth, LogSegment *ls, |
3189 | map<CInode*, map<client_t,Capability::Export> >& peer_exports, | |
3190 | list<ScatterLock*>& updated_scatterlocks) | |
9f95a23c TL |
3191 | { |
3192 | CInode *in; | |
3193 | bool added = false; | |
3194 | DECODE_START(1, blp); | |
3195 | dout(15) << " on " << *dn << dendl; | |
7c673cae FG |
3196 | |
3197 | inodeno_t ino; | |
3198 | snapid_t last; | |
11fdf7f2 TL |
3199 | decode(ino, blp); |
3200 | decode(last, blp); | |
7c673cae | 3201 | |
f67539c2 | 3202 | in = mdcache->get_inode(ino, last); |
7c673cae | 3203 | if (!in) { |
f67539c2 | 3204 | in = new CInode(mds->mdcache, true, 2, last); |
7c673cae FG |
3205 | added = true; |
3206 | } | |
3207 | ||
3208 | // state after link -- or not! -sage | |
3209 | in->decode_import(blp, ls); // cap imports are noted for later action | |
3210 | ||
3211 | // caps | |
3212 | decode_import_inode_caps(in, true, blp, peer_exports); | |
3213 | ||
9f95a23c TL |
3214 | DECODE_FINISH(blp); |
3215 | ||
7c673cae FG |
3216 | // link before state -- or not! -sage |
3217 | if (dn->get_linkage()->get_inode() != in) { | |
11fdf7f2 | 3218 | ceph_assert(!dn->get_linkage()->get_inode()); |
7c673cae FG |
3219 | dn->dir->link_primary_inode(dn, in); |
3220 | } | |
28e407b8 AA |
3221 | |
3222 | if (in->is_dir()) | |
3223 | dn->dir->pop_lru_subdirs.push_back(&in->item_pop_lru); | |
7c673cae FG |
3224 | |
3225 | // add inode? | |
3226 | if (added) { | |
f67539c2 | 3227 | mdcache->add_inode(in); |
7c673cae FG |
3228 | dout(10) << "added " << *in << dendl; |
3229 | } else { | |
3230 | dout(10) << " had " << *in << dendl; | |
3231 | } | |
3232 | ||
f67539c2 | 3233 | if (in->get_inode()->is_dirty_rstat()) |
7c673cae | 3234 | in->mark_dirty_rstat(); |
f91f0fd5 | 3235 | |
f67539c2 | 3236 | if (!in->get_inode()->client_ranges.empty()) |
f91f0fd5 | 3237 | in->mark_clientwriteable(); |
7c673cae FG |
3238 | |
3239 | // clear if dirtyscattered, since we're going to journal this | |
3240 | // but not until we _actually_ finish the import... | |
3241 | if (in->filelock.is_dirty()) { | |
3242 | updated_scatterlocks.push_back(&in->filelock); | |
3243 | mds->locker->mark_updated_scatterlock(&in->filelock); | |
3244 | } | |
3245 | ||
3246 | if (in->dirfragtreelock.is_dirty()) { | |
3247 | updated_scatterlocks.push_back(&in->dirfragtreelock); | |
3248 | mds->locker->mark_updated_scatterlock(&in->dirfragtreelock); | |
3249 | } | |
3250 | ||
3251 | // adjust replica list | |
3252 | //assert(!in->is_replica(oldauth)); // not true on failed export | |
3253 | in->add_replica(oldauth, CInode::EXPORT_NONCE); | |
3254 | if (in->is_replica(mds->get_nodeid())) | |
3255 | in->remove_replica(mds->get_nodeid()); | |
11fdf7f2 TL |
3256 | |
3257 | if (in->snaplock.is_stable() && | |
3258 | in->snaplock.get_state() != LOCK_SYNC) | |
3259 | mds->locker->try_eval(&in->snaplock, NULL); | |
9f95a23c TL |
3260 | |
3261 | if (in->policylock.is_stable() && | |
3262 | in->policylock.get_state() != LOCK_SYNC) | |
3263 | mds->locker->try_eval(&in->policylock, NULL); | |
7c673cae FG |
3264 | } |
3265 | ||
3266 | void Migrator::decode_import_inode_caps(CInode *in, bool auth_cap, | |
11fdf7f2 | 3267 | bufferlist::const_iterator &blp, |
7c673cae FG |
3268 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) |
3269 | { | |
9f95a23c | 3270 | DECODE_START(1, blp); |
7c673cae | 3271 | map<client_t,Capability::Export> cap_map; |
11fdf7f2 TL |
3272 | decode(cap_map, blp); |
3273 | if (auth_cap) { | |
3274 | mempool::mds_co::compact_map<int32_t,int32_t> mds_wanted; | |
3275 | decode(mds_wanted, blp); | |
3276 | mds_wanted.erase(mds->get_nodeid()); | |
3277 | in->set_mds_caps_wanted(mds_wanted); | |
3278 | } | |
7c673cae | 3279 | if (!cap_map.empty() || |
b32b8144 | 3280 | (auth_cap && (in->get_caps_wanted() & ~CEPH_CAP_PIN))) { |
7c673cae FG |
3281 | peer_exports[in].swap(cap_map); |
3282 | in->get(CInode::PIN_IMPORTINGCAPS); | |
3283 | } | |
9f95a23c | 3284 | DECODE_FINISH(blp); |
7c673cae FG |
3285 | } |
3286 | ||
3287 | void Migrator::finish_import_inode_caps(CInode *in, mds_rank_t peer, bool auth_cap, | |
28e407b8 AA |
3288 | const map<client_t,pair<Session*,uint64_t> >& session_map, |
3289 | const map<client_t,Capability::Export> &export_map, | |
7c673cae FG |
3290 | map<client_t,Capability::Import> &import_map) |
3291 | { | |
f91f0fd5 TL |
3292 | const auto& client_ranges = in->get_projected_inode()->client_ranges; |
3293 | auto r = client_ranges.cbegin(); | |
3294 | bool needs_recover = false; | |
3295 | ||
28e407b8 | 3296 | for (auto& it : export_map) { |
9f95a23c | 3297 | dout(10) << "for client." << it.first << " on " << *in << dendl; |
28e407b8 AA |
3298 | |
3299 | auto p = session_map.find(it.first); | |
3300 | if (p == session_map.end()) { | |
3301 | dout(10) << " no session for client." << it.first << dendl; | |
3302 | (void)import_map[it.first]; | |
3303 | continue; | |
3304 | } | |
7c673cae | 3305 | |
28e407b8 AA |
3306 | Session *session = p->second.first; |
3307 | ||
3308 | Capability *cap = in->get_client_cap(it.first); | |
7c673cae | 3309 | if (!cap) { |
28e407b8 | 3310 | cap = in->add_client_cap(it.first, session); |
7c673cae FG |
3311 | if (peer < 0) |
3312 | cap->mark_importing(); | |
3313 | } | |
3314 | ||
f91f0fd5 TL |
3315 | if (auth_cap) { |
3316 | while (r != client_ranges.cend() && r->first < it.first) { | |
3317 | needs_recover = true; | |
3318 | ++r; | |
3319 | } | |
3320 | if (r != client_ranges.cend() && r->first == it.first) { | |
3321 | cap->mark_clientwriteable(); | |
3322 | ++r; | |
3323 | } | |
3324 | } | |
3325 | ||
1adf2230 AA |
3326 | // Always ask exporter mds to send cap export messages for auth caps. |
3327 | // For non-auth caps, ask exporter mds to send cap export messages to | |
3328 | // clients who haven't opened sessions. The cap export messages will | |
3329 | // make clients open sessions. | |
11fdf7f2 | 3330 | if (auth_cap || !session->get_connection()) { |
1adf2230 AA |
3331 | Capability::Import& im = import_map[it.first]; |
3332 | im.cap_id = cap->get_cap_id(); | |
3333 | im.mseq = auth_cap ? it.second.mseq : cap->get_mseq(); | |
3334 | im.issue_seq = cap->get_last_seq() + 1; | |
3335 | } | |
7c673cae FG |
3336 | |
3337 | if (peer >= 0) { | |
28e407b8 | 3338 | cap->merge(it.second, auth_cap); |
f67539c2 | 3339 | mdcache->do_cap_import(session, in, cap, it.second.cap_id, |
28e407b8 | 3340 | it.second.seq, it.second.mseq - 1, peer, |
7c673cae FG |
3341 | auth_cap ? CEPH_CAP_FLAG_AUTH : CEPH_CAP_FLAG_RELEASE); |
3342 | } | |
3343 | } | |
3344 | ||
f91f0fd5 TL |
3345 | if (auth_cap) { |
3346 | if (r != client_ranges.cend()) | |
3347 | needs_recover = true; | |
3348 | if (needs_recover) | |
3349 | in->state_set(CInode::STATE_NEEDSRECOVER); | |
3350 | } | |
3351 | ||
7c673cae FG |
3352 | if (peer >= 0) { |
3353 | in->replica_caps_wanted = 0; | |
3354 | in->put(CInode::PIN_IMPORTINGCAPS); | |
3355 | } | |
3356 | } | |
3357 | ||
9f95a23c | 3358 | void Migrator::decode_import_dir(bufferlist::const_iterator& blp, |
7c673cae FG |
3359 | mds_rank_t oldauth, |
3360 | CDir *import_root, | |
3361 | EImportStart *le, | |
3362 | LogSegment *ls, | |
3363 | map<CInode*,map<client_t,Capability::Export> >& peer_exports, | |
9f95a23c | 3364 | list<ScatterLock*>& updated_scatterlocks, int &num_imported) |
7c673cae | 3365 | { |
9f95a23c | 3366 | DECODE_START(1, blp); |
7c673cae FG |
3367 | // set up dir |
3368 | dirfrag_t df; | |
11fdf7f2 | 3369 | decode(df, blp); |
7c673cae | 3370 | |
f67539c2 | 3371 | CInode *diri = mdcache->get_inode(df.ino); |
11fdf7f2 | 3372 | ceph_assert(diri); |
7c673cae | 3373 | CDir *dir = diri->get_or_open_dirfrag(mds->mdcache, df.frag); |
11fdf7f2 | 3374 | ceph_assert(dir); |
7c673cae | 3375 | |
9f95a23c | 3376 | dout(7) << *dir << dendl; |
7c673cae | 3377 | |
11fdf7f2 TL |
3378 | if (!dir->freeze_tree_state) { |
3379 | ceph_assert(dir->get_version() == 0); | |
3380 | dir->freeze_tree_state = import_root->freeze_tree_state; | |
3381 | } | |
3382 | ||
7c673cae | 3383 | // assimilate state |
11fdf7f2 | 3384 | dir->decode_import(blp, ls); |
7c673cae FG |
3385 | |
3386 | // adjust replica list | |
3387 | //assert(!dir->is_replica(oldauth)); // not true on failed export | |
3388 | dir->add_replica(oldauth, CDir::EXPORT_NONCE); | |
3389 | if (dir->is_replica(mds->get_nodeid())) | |
3390 | dir->remove_replica(mds->get_nodeid()); | |
3391 | ||
3392 | // add to journal entry | |
3393 | if (le) | |
3394 | le->metablob.add_import_dir(dir); | |
3395 | ||
3396 | int num_imported = 0; | |
3397 | ||
3398 | // take all waiters on this dir | |
3399 | // NOTE: a pass of imported data is guaranteed to get all of my waiters because | |
3400 | // a replica's presense in my cache implies/forces it's presense in authority's. | |
11fdf7f2 | 3401 | MDSContext::vec waiters; |
7c673cae | 3402 | dir->take_waiting(CDir::WAIT_ANY_MASK, waiters); |
11fdf7f2 TL |
3403 | for (auto c : waiters) |
3404 | dir->add_waiter(CDir::WAIT_UNFREEZE, c); // UNFREEZE will get kicked both on success or failure | |
7c673cae FG |
3405 | |
3406 | dout(15) << "doing contents" << dendl; | |
3407 | ||
3408 | // contents | |
3409 | __u32 nden; | |
11fdf7f2 | 3410 | decode(nden, blp); |
7c673cae FG |
3411 | |
3412 | for (; nden>0; nden--) { | |
3413 | num_imported++; | |
3414 | ||
3415 | // dentry | |
3416 | string dname; | |
3417 | snapid_t last; | |
11fdf7f2 TL |
3418 | decode(dname, blp); |
3419 | decode(last, blp); | |
7c673cae FG |
3420 | |
3421 | CDentry *dn = dir->lookup_exact_snap(dname, last); | |
3422 | if (!dn) | |
3423 | dn = dir->add_null_dentry(dname, 1, last); | |
3424 | ||
3425 | dn->decode_import(blp, ls); | |
3426 | ||
3427 | dn->add_replica(oldauth, CDentry::EXPORT_NONCE); | |
3428 | if (dn->is_replica(mds->get_nodeid())) | |
3429 | dn->remove_replica(mds->get_nodeid()); | |
3430 | ||
3431 | // dentry lock in unreadable state can block path traverse | |
3432 | if (dn->lock.get_state() != LOCK_SYNC) | |
3433 | mds->locker->try_eval(&dn->lock, NULL); | |
3434 | ||
9f95a23c | 3435 | dout(15) << " got " << *dn << dendl; |
7c673cae FG |
3436 | |
3437 | // points to... | |
3438 | char icode; | |
11fdf7f2 | 3439 | decode(icode, blp); |
7c673cae FG |
3440 | |
3441 | if (icode == 'N') { | |
3442 | // null dentry | |
11fdf7f2 | 3443 | ceph_assert(dn->get_linkage()->is_null()); |
7c673cae FG |
3444 | |
3445 | // fall thru | |
3446 | } | |
f67539c2 | 3447 | else if (icode == 'L' || icode == 'l') { |
7c673cae FG |
3448 | // remote link |
3449 | inodeno_t ino; | |
3450 | unsigned char d_type; | |
f67539c2 TL |
3451 | mempool::mds_co::string alternate_name; |
3452 | ||
3453 | CDentry::decode_remote(icode, ino, d_type, alternate_name, blp); | |
3454 | ||
7c673cae | 3455 | if (dn->get_linkage()->is_remote()) { |
11fdf7f2 | 3456 | ceph_assert(dn->get_linkage()->get_remote_ino() == ino); |
f67539c2 | 3457 | ceph_assert(dn->get_alternate_name() == alternate_name); |
7c673cae FG |
3458 | } else { |
3459 | dir->link_remote_inode(dn, ino, d_type); | |
f67539c2 | 3460 | dn->set_alternate_name(std::move(alternate_name)); |
7c673cae FG |
3461 | } |
3462 | } | |
f67539c2 | 3463 | else if (icode == 'I' || icode == 'i') { |
7c673cae | 3464 | // inode |
11fdf7f2 | 3465 | ceph_assert(le); |
f67539c2 TL |
3466 | if (icode == 'i') { |
3467 | DECODE_START(2, blp); | |
3468 | decode_import_inode(dn, blp, oldauth, ls, | |
3469 | peer_exports, updated_scatterlocks); | |
3470 | ceph_assert(!dn->is_projected()); | |
3471 | decode(dn->alternate_name, blp); | |
3472 | DECODE_FINISH(blp); | |
3473 | } else { | |
3474 | decode_import_inode(dn, blp, oldauth, ls, | |
3475 | peer_exports, updated_scatterlocks); | |
3476 | } | |
7c673cae FG |
3477 | } |
3478 | ||
3479 | // add dentry to journal entry | |
3480 | if (le) | |
3481 | le->metablob.add_import_dentry(dn); | |
3482 | } | |
3483 | ||
3484 | #ifdef MDS_VERIFY_FRAGSTAT | |
3485 | if (dir->is_complete()) | |
3486 | dir->verify_fragstat(); | |
3487 | #endif | |
3488 | ||
3489 | dir->inode->maybe_export_pin(); | |
3490 | ||
9f95a23c TL |
3491 | dout(7) << " done " << *dir << dendl; |
3492 | DECODE_FINISH(blp); | |
7c673cae FG |
3493 | } |
3494 | ||
3495 | ||
3496 | ||
3497 | ||
3498 | ||
3499 | // authority bystander | |
3500 | ||
9f95a23c | 3501 | void Migrator::handle_export_notify(const cref_t<MExportDirNotify> &m) |
7c673cae FG |
3502 | { |
3503 | if (!(mds->is_clientreplay() || mds->is_active() || mds->is_stopping())) { | |
7c673cae FG |
3504 | return; |
3505 | } | |
3506 | ||
f67539c2 | 3507 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae FG |
3508 | |
3509 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
3510 | mds_authority_t old_auth = m->get_old_auth(); | |
3511 | mds_authority_t new_auth = m->get_new_auth(); | |
3512 | ||
3513 | if (!dir) { | |
9f95a23c | 3514 | dout(7) << old_auth << " -> " << new_auth |
7c673cae FG |
3515 | << " on missing dir " << m->get_dirfrag() << dendl; |
3516 | } else if (dir->authority() != old_auth) { | |
9f95a23c | 3517 | dout(7) << "old_auth was " << dir->authority() |
7c673cae FG |
3518 | << " != " << old_auth << " -> " << new_auth |
3519 | << " on " << *dir << dendl; | |
3520 | } else { | |
9f95a23c | 3521 | dout(7) << old_auth << " -> " << new_auth |
7c673cae FG |
3522 | << " on " << *dir << dendl; |
3523 | // adjust auth | |
3524 | set<CDir*> have; | |
f67539c2 TL |
3525 | mdcache->map_dirfrag_set(m->get_bounds(), have); |
3526 | mdcache->adjust_bounded_subtree_auth(dir, have, new_auth); | |
7c673cae FG |
3527 | |
3528 | // induce a merge? | |
f67539c2 | 3529 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
3530 | } |
3531 | ||
3532 | // send ack | |
3533 | if (m->wants_ack()) { | |
9f95a23c | 3534 | mds->send_message_mds(make_message<MExportDirNotifyAck>(m->get_dirfrag(), m->get_tid(), m->get_new_auth()), from); |
7c673cae FG |
3535 | } else { |
3536 | // aborted. no ack. | |
9f95a23c | 3537 | dout(7) << "no ack requested" << dendl; |
7c673cae | 3538 | } |
7c673cae FG |
3539 | } |
3540 | ||
3541 | /** cap exports **/ | |
3542 | void Migrator::export_caps(CInode *in) | |
3543 | { | |
3544 | mds_rank_t dest = in->authority().first; | |
9f95a23c | 3545 | dout(7) << "to mds." << dest << " " << *in << dendl; |
7c673cae | 3546 | |
11fdf7f2 TL |
3547 | ceph_assert(in->is_any_caps()); |
3548 | ceph_assert(!in->is_auth()); | |
3549 | ceph_assert(!in->is_ambiguous_auth()); | |
3550 | ceph_assert(!in->state_test(CInode::STATE_EXPORTINGCAPS)); | |
7c673cae | 3551 | |
9f95a23c | 3552 | auto ex = make_message<MExportCaps>(); |
7c673cae FG |
3553 | ex->ino = in->ino(); |
3554 | ||
11fdf7f2 | 3555 | encode_export_inode_caps(in, false, ex->cap_bl, ex->client_map, ex->client_metadata_map); |
7c673cae FG |
3556 | |
3557 | mds->send_message_mds(ex, dest); | |
3558 | } | |
3559 | ||
9f95a23c | 3560 | void Migrator::handle_export_caps_ack(const cref_t<MExportCapsAck> &ack) |
1adf2230 AA |
3561 | { |
3562 | mds_rank_t from = ack->get_source().num(); | |
f67539c2 | 3563 | CInode *in = mdcache->get_inode(ack->ino); |
1adf2230 | 3564 | if (in) { |
11fdf7f2 | 3565 | ceph_assert(!in->is_auth()); |
1adf2230 | 3566 | |
9f95a23c | 3567 | dout(10) << *ack << " from " |
1adf2230 AA |
3568 | << ack->get_source() << " on " << *in << dendl; |
3569 | ||
3570 | map<client_t,Capability::Import> imported_caps; | |
3571 | map<client_t,uint64_t> caps_ids; | |
11fdf7f2 TL |
3572 | auto blp = ack->cap_bl.cbegin(); |
3573 | decode(imported_caps, blp); | |
3574 | decode(caps_ids, blp); | |
1adf2230 AA |
3575 | |
3576 | for (auto& it : imported_caps) { | |
3577 | Capability *cap = in->get_client_cap(it.first); | |
3578 | if (!cap || cap->get_cap_id() != caps_ids.at(it.first)) | |
3579 | continue; | |
3580 | ||
9f95a23c | 3581 | dout(7) << " telling client." << it.first |
1adf2230 | 3582 | << " exported caps on " << *in << dendl; |
9f95a23c | 3583 | auto m = make_message<MClientCaps>(CEPH_CAP_OP_EXPORT, in->ino(), 0, |
1adf2230 AA |
3584 | cap->get_cap_id(), cap->get_mseq(), |
3585 | mds->get_osd_epoch_barrier()); | |
3586 | m->set_cap_peer(it.second.cap_id, it.second.issue_seq, it.second.mseq, from, 0); | |
3587 | mds->send_message_client_counted(m, it.first); | |
3588 | ||
3589 | in->remove_client_cap(it.first); | |
3590 | } | |
3591 | ||
3592 | mds->locker->request_inode_file_caps(in); | |
3593 | mds->locker->try_eval(in, CEPH_CAP_LOCKS); | |
3594 | } | |
1adf2230 AA |
3595 | } |
3596 | ||
9f95a23c | 3597 | void Migrator::handle_gather_caps(const cref_t<MGatherCaps> &m) |
7c673cae | 3598 | { |
f67539c2 | 3599 | CInode *in = mdcache->get_inode(m->ino); |
7c673cae | 3600 | if (!in) |
11fdf7f2 | 3601 | return; |
7c673cae | 3602 | |
9f95a23c | 3603 | dout(10) << *m << " from " << m->get_source() |
1adf2230 AA |
3604 | << " on " << *in << dendl; |
3605 | ||
7c673cae FG |
3606 | if (in->is_any_caps() && |
3607 | !in->is_auth() && | |
3608 | !in->is_ambiguous_auth() && | |
3609 | !in->state_test(CInode::STATE_EXPORTINGCAPS)) | |
3610 | export_caps(in); | |
7c673cae FG |
3611 | } |
3612 | ||
3613 | class C_M_LoggedImportCaps : public MigratorLogContext { | |
3614 | CInode *in; | |
3615 | mds_rank_t from; | |
3616 | public: | |
28e407b8 | 3617 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae | 3618 | map<CInode*, map<client_t,Capability::Export> > peer_exports; |
7c673cae FG |
3619 | |
3620 | C_M_LoggedImportCaps(Migrator *m, CInode *i, mds_rank_t f) : MigratorLogContext(m), in(i), from(f) {} | |
3621 | void finish(int r) override { | |
28e407b8 | 3622 | mig->logged_import_caps(in, from, imported_session_map, peer_exports); |
7c673cae FG |
3623 | } |
3624 | }; | |
3625 | ||
9f95a23c | 3626 | void Migrator::handle_export_caps(const cref_t<MExportCaps> &ex) |
7c673cae | 3627 | { |
9f95a23c | 3628 | dout(10) << *ex << " from " << ex->get_source() << dendl; |
f67539c2 | 3629 | CInode *in = mdcache->get_inode(ex->ino); |
7c673cae | 3630 | |
11fdf7f2 TL |
3631 | ceph_assert(in); |
3632 | ceph_assert(in->is_auth()); | |
7c673cae FG |
3633 | |
3634 | // FIXME | |
28e407b8 | 3635 | if (!in->can_auth_pin()) { |
7c673cae | 3636 | return; |
28e407b8 AA |
3637 | } |
3638 | ||
181888fb | 3639 | in->auth_pin(this); |
7c673cae | 3640 | |
11fdf7f2 TL |
3641 | map<client_t,entity_inst_t> client_map{ex->client_map}; |
3642 | map<client_t,client_metadata_t> client_metadata_map{ex->client_metadata_map}; | |
28e407b8 | 3643 | |
7c673cae FG |
3644 | C_M_LoggedImportCaps *finish = new C_M_LoggedImportCaps( |
3645 | this, in, mds_rank_t(ex->get_source().num())); | |
7c673cae | 3646 | |
11fdf7f2 | 3647 | version_t pv = mds->server->prepare_force_open_sessions(client_map, client_metadata_map, |
28e407b8 | 3648 | finish->imported_session_map); |
7c673cae | 3649 | // decode new caps |
11fdf7f2 | 3650 | auto blp = ex->cap_bl.cbegin(); |
7c673cae | 3651 | decode_import_inode_caps(in, false, blp, finish->peer_exports); |
11fdf7f2 | 3652 | ceph_assert(!finish->peer_exports.empty()); // thus, inode is pinned. |
7c673cae FG |
3653 | |
3654 | // journal open client sessions | |
11fdf7f2 TL |
3655 | ESessions *le = new ESessions(pv, std::move(client_map), |
3656 | std::move(client_metadata_map)); | |
7c673cae FG |
3657 | mds->mdlog->start_submit_entry(le, finish); |
3658 | mds->mdlog->flush(); | |
7c673cae FG |
3659 | } |
3660 | ||
3661 | ||
3662 | void Migrator::logged_import_caps(CInode *in, | |
3663 | mds_rank_t from, | |
28e407b8 AA |
3664 | map<client_t,pair<Session*,uint64_t> >& imported_session_map, |
3665 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) | |
7c673cae | 3666 | { |
9f95a23c | 3667 | dout(10) << *in << dendl; |
7c673cae | 3668 | // see export_go() vs export_go_synced() |
11fdf7f2 | 3669 | ceph_assert(in->is_auth()); |
7c673cae FG |
3670 | |
3671 | // force open client sessions and finish cap import | |
28e407b8 | 3672 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae | 3673 | |
28e407b8 | 3674 | auto it = peer_exports.find(in); |
11fdf7f2 | 3675 | ceph_assert(it != peer_exports.end()); |
28e407b8 | 3676 | |
7c673cae | 3677 | // clients will release caps from the exporter when they receive the cap import message. |
1adf2230 | 3678 | map<client_t,Capability::Import> imported_caps; |
28e407b8 | 3679 | finish_import_inode_caps(in, from, false, imported_session_map, it->second, imported_caps); |
7c673cae | 3680 | mds->locker->eval(in, CEPH_CAP_LOCKS, true); |
1adf2230 AA |
3681 | |
3682 | if (!imported_caps.empty()) { | |
9f95a23c | 3683 | auto ack = make_message<MExportCapsAck>(in->ino()); |
1adf2230 AA |
3684 | map<client_t,uint64_t> peer_caps_ids; |
3685 | for (auto &p : imported_caps ) | |
3686 | peer_caps_ids[p.first] = it->second.at(p.first).cap_id; | |
3687 | ||
11fdf7f2 TL |
3688 | encode(imported_caps, ack->cap_bl); |
3689 | encode(peer_caps_ids, ack->cap_bl); | |
1adf2230 AA |
3690 | mds->send_message_mds(ack, from); |
3691 | } | |
3692 | ||
181888fb | 3693 | in->auth_unpin(this); |
7c673cae | 3694 | } |
28e407b8 | 3695 | |
f67539c2 | 3696 | Migrator::Migrator(MDSRank *m, MDCache *c) : mds(m), mdcache(c) { |
11fdf7f2 TL |
3697 | max_export_size = g_conf().get_val<Option::size_t>("mds_max_export_size"); |
3698 | inject_session_race = g_conf().get_val<bool>("mds_inject_migrator_session_race"); | |
91327a77 AA |
3699 | } |
3700 | ||
92f5a8d4 | 3701 | void Migrator::handle_conf_change(const std::set<std::string>& changed, const MDSMap& mds_map) |
28e407b8 | 3702 | { |
91327a77 | 3703 | if (changed.count("mds_max_export_size")) |
11fdf7f2 | 3704 | max_export_size = g_conf().get_val<Option::size_t>("mds_max_export_size"); |
28e407b8 | 3705 | if (changed.count("mds_inject_migrator_session_race")) { |
92f5a8d4 | 3706 | inject_session_race = g_conf().get_val<bool>("mds_inject_migrator_session_race"); |
28e407b8 AA |
3707 | dout(0) << "mds_inject_migrator_session_race is " << inject_session_race << dendl; |
3708 | } | |
3709 | } |