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