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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "MDSRank.h" | |
16 | #include "MDCache.h" | |
17 | #include "CInode.h" | |
18 | #include "CDir.h" | |
19 | #include "CDentry.h" | |
20 | #include "Migrator.h" | |
21 | #include "Locker.h" | |
22 | #include "Server.h" | |
23 | ||
24 | #include "MDBalancer.h" | |
25 | #include "MDLog.h" | |
26 | #include "MDSMap.h" | |
27 | #include "Mutation.h" | |
28 | ||
29 | #include "include/filepath.h" | |
28e407b8 | 30 | #include "common/likely.h" |
7c673cae FG |
31 | |
32 | #include "events/EExport.h" | |
33 | #include "events/EImportStart.h" | |
34 | #include "events/EImportFinish.h" | |
35 | #include "events/ESessions.h" | |
36 | ||
37 | #include "msg/Messenger.h" | |
38 | ||
39 | #include "messages/MClientCaps.h" | |
40 | ||
7c673cae FG |
41 | /* |
42 | * this is what the dir->dir_auth values look like | |
43 | * | |
44 | * dir_auth authbits | |
45 | * export | |
46 | * me me - before | |
47 | * me, me me - still me, but preparing for export | |
48 | * me, them me - send MExportDir (peer is preparing) | |
49 | * them, me me - journaled EExport | |
50 | * them them - done | |
51 | * | |
52 | * import: | |
53 | * them them - before | |
54 | * me, them me - journaled EImportStart | |
55 | * me me - done | |
56 | * | |
57 | * which implies: | |
58 | * - auth bit is set if i am listed as first _or_ second dir_auth. | |
59 | */ | |
60 | ||
61 | #include "common/config.h" | |
62 | ||
63 | ||
64 | #define dout_context g_ceph_context | |
65 | #define dout_subsys ceph_subsys_mds | |
66 | #undef dout_prefix | |
9f95a23c | 67 | #define dout_prefix *_dout << "mds." << mds->get_nodeid() << ".mig " << __func__ << " " |
7c673cae | 68 | |
20effc67 | 69 | using namespace std; |
7c673cae | 70 | |
11fdf7f2 | 71 | class MigratorContext : public MDSContext { |
7c673cae FG |
72 | protected: |
73 | Migrator *mig; | |
74 | MDSRank *get_mds() override { | |
75 | return mig->mds; | |
76 | } | |
77 | public: | |
78 | explicit MigratorContext(Migrator *mig_) : mig(mig_) { | |
11fdf7f2 | 79 | ceph_assert(mig != NULL); |
7c673cae FG |
80 | } |
81 | }; | |
82 | ||
83 | class MigratorLogContext : public MDSLogContextBase { | |
84 | protected: | |
85 | Migrator *mig; | |
86 | MDSRank *get_mds() override { | |
87 | return mig->mds; | |
88 | } | |
89 | public: | |
90 | explicit MigratorLogContext(Migrator *mig_) : mig(mig_) { | |
11fdf7f2 | 91 | ceph_assert(mig != NULL); |
7c673cae FG |
92 | } |
93 | }; | |
94 | ||
9f95a23c | 95 | void Migrator::dispatch(const cref_t<Message> &m) |
7c673cae FG |
96 | { |
97 | switch (m->get_type()) { | |
98 | // import | |
99 | case MSG_MDS_EXPORTDIRDISCOVER: | |
9f95a23c | 100 | handle_export_discover(ref_cast<MExportDirDiscover>(m)); |
7c673cae FG |
101 | break; |
102 | case MSG_MDS_EXPORTDIRPREP: | |
9f95a23c | 103 | handle_export_prep(ref_cast<MExportDirPrep>(m)); |
7c673cae FG |
104 | break; |
105 | case MSG_MDS_EXPORTDIR: | |
28e407b8 AA |
106 | if (unlikely(inject_session_race)) { |
107 | dout(0) << "waiting for inject_session_race" << dendl; | |
108 | mds->wait_for_any_client_connection(new C_MDS_RetryMessage(mds, m)); | |
109 | } else { | |
9f95a23c | 110 | handle_export_dir(ref_cast<MExportDir>(m)); |
28e407b8 | 111 | } |
7c673cae FG |
112 | break; |
113 | case MSG_MDS_EXPORTDIRFINISH: | |
9f95a23c | 114 | handle_export_finish(ref_cast<MExportDirFinish>(m)); |
7c673cae FG |
115 | break; |
116 | case MSG_MDS_EXPORTDIRCANCEL: | |
9f95a23c | 117 | handle_export_cancel(ref_cast<MExportDirCancel>(m)); |
7c673cae FG |
118 | break; |
119 | ||
120 | // export | |
121 | case MSG_MDS_EXPORTDIRDISCOVERACK: | |
9f95a23c | 122 | handle_export_discover_ack(ref_cast<MExportDirDiscoverAck>(m)); |
7c673cae FG |
123 | break; |
124 | case MSG_MDS_EXPORTDIRPREPACK: | |
9f95a23c | 125 | handle_export_prep_ack(ref_cast<MExportDirPrepAck>(m)); |
7c673cae FG |
126 | break; |
127 | case MSG_MDS_EXPORTDIRACK: | |
9f95a23c | 128 | handle_export_ack(ref_cast<MExportDirAck>(m)); |
7c673cae FG |
129 | break; |
130 | case MSG_MDS_EXPORTDIRNOTIFYACK: | |
9f95a23c | 131 | handle_export_notify_ack(ref_cast<MExportDirNotifyAck>(m)); |
11fdf7f2 | 132 | break; |
7c673cae FG |
133 | |
134 | // export 3rd party (dir_auth adjustments) | |
135 | case MSG_MDS_EXPORTDIRNOTIFY: | |
9f95a23c | 136 | handle_export_notify(ref_cast<MExportDirNotify>(m)); |
7c673cae FG |
137 | break; |
138 | ||
139 | // caps | |
140 | case MSG_MDS_EXPORTCAPS: | |
9f95a23c | 141 | handle_export_caps(ref_cast<MExportCaps>(m)); |
7c673cae | 142 | break; |
1adf2230 | 143 | case MSG_MDS_EXPORTCAPSACK: |
9f95a23c | 144 | handle_export_caps_ack(ref_cast<MExportCapsAck>(m)); |
1adf2230 | 145 | break; |
7c673cae | 146 | case MSG_MDS_GATHERCAPS: |
9f95a23c | 147 | handle_gather_caps(ref_cast<MGatherCaps>(m)); |
7c673cae FG |
148 | break; |
149 | ||
150 | default: | |
151 | derr << "migrator unknown message " << m->get_type() << dendl; | |
11fdf7f2 | 152 | ceph_abort_msg("migrator unknown message"); |
7c673cae FG |
153 | } |
154 | } | |
155 | ||
7c673cae FG |
156 | void Migrator::export_empty_import(CDir *dir) |
157 | { | |
9f95a23c | 158 | dout(7) << *dir << dendl; |
11fdf7f2 | 159 | ceph_assert(dir->is_subtree_root()); |
7c673cae FG |
160 | |
161 | if (dir->inode->is_auth()) { | |
162 | dout(7) << " inode is auth" << dendl; | |
163 | return; | |
164 | } | |
165 | if (!dir->is_auth()) { | |
166 | dout(7) << " not auth" << dendl; | |
167 | return; | |
168 | } | |
169 | if (dir->is_freezing() || dir->is_frozen()) { | |
170 | dout(7) << " freezing or frozen" << dendl; | |
171 | return; | |
172 | } | |
173 | if (dir->get_num_head_items() > 0) { | |
174 | dout(7) << " not actually empty" << dendl; | |
175 | return; | |
176 | } | |
177 | if (dir->inode->is_root()) { | |
178 | dout(7) << " root" << dendl; | |
179 | return; | |
180 | } | |
181 | ||
182 | mds_rank_t dest = dir->inode->authority().first; | |
183 | //if (mds->is_shutting_down()) dest = 0; // this is more efficient. | |
184 | ||
185 | dout(7) << " really empty, exporting to " << dest << dendl; | |
186 | assert (dest != mds->get_nodeid()); | |
187 | ||
188 | dout(7) << "exporting to mds." << dest | |
189 | << " empty import " << *dir << dendl; | |
190 | export_dir( dir, dest ); | |
191 | } | |
192 | ||
193 | void Migrator::find_stale_export_freeze() | |
194 | { | |
195 | utime_t now = ceph_clock_now(); | |
196 | utime_t cutoff = now; | |
11fdf7f2 | 197 | cutoff -= g_conf()->mds_freeze_tree_timeout; |
7c673cae FG |
198 | |
199 | ||
200 | /* | |
201 | * We could have situations like: | |
202 | * | |
203 | * - mds.0 authpins an item in subtree A | |
204 | * - mds.0 sends request to mds.1 to authpin an item in subtree B | |
205 | * - mds.0 freezes subtree A | |
206 | * - mds.1 authpins an item in subtree B | |
207 | * - mds.1 sends request to mds.0 to authpin an item in subtree A | |
208 | * - mds.1 freezes subtree B | |
209 | * - mds.1 receives the remote authpin request from mds.0 | |
210 | * (wait because subtree B is freezing) | |
211 | * - mds.0 receives the remote authpin request from mds.1 | |
212 | * (wait because subtree A is freezing) | |
213 | * | |
214 | * | |
215 | * - client request authpins items in subtree B | |
216 | * - freeze subtree B | |
217 | * - import subtree A which is parent of subtree B | |
218 | * (authpins parent inode of subtree B, see CDir::set_dir_auth()) | |
219 | * - freeze subtree A | |
220 | * - client request tries authpinning items in subtree A | |
221 | * (wait because subtree A is freezing) | |
222 | */ | |
223 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
224 | p != export_state.end(); ) { | |
225 | CDir* dir = p->first; | |
226 | export_state_t& stat = p->second; | |
227 | ++p; | |
228 | if (stat.state != EXPORT_DISCOVERING && stat.state != EXPORT_FREEZING) | |
229 | continue; | |
11fdf7f2 TL |
230 | ceph_assert(dir->freeze_tree_state); |
231 | if (stat.last_cum_auth_pins != dir->freeze_tree_state->auth_pins) { | |
232 | stat.last_cum_auth_pins = dir->freeze_tree_state->auth_pins; | |
7c673cae FG |
233 | stat.last_cum_auth_pins_change = now; |
234 | continue; | |
235 | } | |
236 | if (stat.last_cum_auth_pins_change >= cutoff) | |
237 | continue; | |
238 | if (stat.num_remote_waiters > 0 || | |
239 | (!dir->inode->is_root() && dir->get_parent_dir()->is_freezing())) { | |
240 | export_try_cancel(dir); | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | void Migrator::export_try_cancel(CDir *dir, bool notify_peer) | |
246 | { | |
9f95a23c | 247 | dout(10) << *dir << dendl; |
7c673cae FG |
248 | |
249 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
11fdf7f2 | 250 | ceph_assert(it != export_state.end()); |
7c673cae FG |
251 | |
252 | int state = it->second.state; | |
253 | switch (state) { | |
254 | case EXPORT_LOCKING: | |
255 | dout(10) << "export state=locking : dropping locks and removing auth_pin" << dendl; | |
91327a77 | 256 | num_locking_exports--; |
7c673cae FG |
257 | it->second.state = EXPORT_CANCELLED; |
258 | dir->auth_unpin(this); | |
259 | break; | |
260 | case EXPORT_DISCOVERING: | |
261 | dout(10) << "export state=discovering : canceling freeze and removing auth_pin" << dendl; | |
262 | it->second.state = EXPORT_CANCELLED; | |
263 | dir->unfreeze_tree(); // cancel the freeze | |
264 | dir->auth_unpin(this); | |
265 | if (notify_peer && | |
266 | (!mds->is_cluster_degraded() || | |
267 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
268 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
269 | it->second.tid), | |
270 | it->second.peer); | |
7c673cae FG |
271 | break; |
272 | ||
273 | case EXPORT_FREEZING: | |
274 | dout(10) << "export state=freezing : canceling freeze" << dendl; | |
275 | it->second.state = EXPORT_CANCELLED; | |
276 | dir->unfreeze_tree(); // cancel the freeze | |
224ce89b | 277 | if (dir->is_subtree_root()) |
f67539c2 | 278 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
279 | if (notify_peer && |
280 | (!mds->is_cluster_degraded() || | |
281 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
282 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
283 | it->second.tid), | |
284 | it->second.peer); | |
7c673cae FG |
285 | break; |
286 | ||
287 | // NOTE: state order reversal, warning comes after prepping | |
288 | case EXPORT_WARNING: | |
289 | dout(10) << "export state=warning : unpinning bounds, unfreezing, notifying" << dendl; | |
290 | it->second.state = EXPORT_CANCELLING; | |
291 | // fall-thru | |
292 | ||
293 | case EXPORT_PREPPING: | |
294 | if (state != EXPORT_WARNING) { | |
295 | dout(10) << "export state=prepping : unpinning bounds, unfreezing" << dendl; | |
296 | it->second.state = EXPORT_CANCELLED; | |
297 | } | |
298 | ||
299 | { | |
300 | // unpin bounds | |
301 | set<CDir*> bounds; | |
f67539c2 | 302 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
303 | for (set<CDir*>::iterator q = bounds.begin(); |
304 | q != bounds.end(); | |
305 | ++q) { | |
306 | CDir *bd = *q; | |
307 | bd->put(CDir::PIN_EXPORTBOUND); | |
308 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
309 | } | |
310 | if (state == EXPORT_WARNING) { | |
311 | // notify bystanders | |
b32b8144 | 312 | export_notify_abort(dir, it->second, bounds); |
7c673cae | 313 | // process delayed expires |
f67539c2 | 314 | mdcache->process_delayed_expire(dir); |
7c673cae FG |
315 | } |
316 | } | |
317 | dir->unfreeze_tree(); | |
f67539c2 | 318 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
319 | if (notify_peer && |
320 | (!mds->is_cluster_degraded() || | |
321 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer))) // tell them. | |
9f95a23c TL |
322 | mds->send_message_mds(make_message<MExportDirCancel>(dir->dirfrag(), |
323 | it->second.tid), | |
324 | it->second.peer); | |
7c673cae FG |
325 | break; |
326 | ||
327 | case EXPORT_EXPORTING: | |
328 | dout(10) << "export state=exporting : reversing, and unfreezing" << dendl; | |
329 | it->second.state = EXPORT_CANCELLING; | |
b32b8144 | 330 | export_reverse(dir, it->second); |
7c673cae FG |
331 | break; |
332 | ||
333 | case EXPORT_LOGGINGFINISH: | |
334 | case EXPORT_NOTIFYING: | |
335 | dout(10) << "export state=loggingfinish|notifying : ignoring dest failure, we were successful." << dendl; | |
336 | // leave export_state, don't clean up now. | |
337 | break; | |
338 | case EXPORT_CANCELLING: | |
339 | break; | |
340 | ||
341 | default: | |
342 | ceph_abort(); | |
343 | } | |
344 | ||
345 | // finish clean-up? | |
346 | if (it->second.state == EXPORT_CANCELLING || | |
347 | it->second.state == EXPORT_CANCELLED) { | |
348 | MutationRef mut; | |
349 | mut.swap(it->second.mut); | |
350 | ||
351 | if (it->second.state == EXPORT_CANCELLED) { | |
91327a77 | 352 | export_cancel_finish(it); |
7c673cae FG |
353 | } |
354 | ||
355 | // drop locks | |
356 | if (state == EXPORT_LOCKING || state == EXPORT_DISCOVERING) { | |
357 | MDRequestRef mdr = static_cast<MDRequestImpl*>(mut.get()); | |
11fdf7f2 | 358 | ceph_assert(mdr); |
f67539c2 | 359 | mdcache->request_kill(mdr); |
7c673cae FG |
360 | } else if (mut) { |
361 | mds->locker->drop_locks(mut.get()); | |
362 | mut->cleanup(); | |
363 | } | |
364 | ||
f67539c2 | 365 | mdcache->show_subtrees(); |
7c673cae FG |
366 | |
367 | maybe_do_queued_export(); | |
368 | } | |
369 | } | |
370 | ||
91327a77 | 371 | void Migrator::export_cancel_finish(export_state_iterator& it) |
7c673cae | 372 | { |
91327a77 AA |
373 | CDir *dir = it->first; |
374 | bool unpin = (it->second.state == EXPORT_CANCELLING); | |
375 | auto parent = std::move(it->second.parent); | |
376 | ||
377 | total_exporting_size -= it->second.approx_size; | |
378 | export_state.erase(it); | |
379 | ||
11fdf7f2 | 380 | ceph_assert(dir->state_test(CDir::STATE_EXPORTING)); |
1adf2230 | 381 | dir->clear_exporting(); |
7c673cae | 382 | |
91327a77 AA |
383 | if (unpin) { |
384 | // pinned by Migrator::export_notify_abort() | |
385 | dir->auth_unpin(this); | |
386 | } | |
7c673cae | 387 | // send pending import_maps? (these need to go out when all exports have finished.) |
f67539c2 | 388 | mdcache->maybe_send_pending_resolves(); |
91327a77 AA |
389 | |
390 | if (parent) | |
391 | child_export_finish(parent, false); | |
7c673cae FG |
392 | } |
393 | ||
394 | // ========================================================== | |
395 | // mds failure handling | |
396 | ||
397 | void Migrator::handle_mds_failure_or_stop(mds_rank_t who) | |
398 | { | |
9f95a23c | 399 | dout(5) << who << dendl; |
7c673cae FG |
400 | |
401 | // check my exports | |
402 | ||
403 | // first add an extra auth_pin on any freezes, so that canceling a | |
404 | // nested freeze doesn't complete one further up the hierarchy and | |
405 | // confuse the shit out of us. we'll remove it after canceling the | |
406 | // freeze. this way no freeze completions run before we want them | |
407 | // to. | |
9f95a23c | 408 | std::vector<CDir*> pinned_dirs; |
7c673cae FG |
409 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); |
410 | p != export_state.end(); | |
411 | ++p) { | |
412 | if (p->second.state == EXPORT_FREEZING) { | |
413 | CDir *dir = p->first; | |
414 | dout(10) << "adding temp auth_pin on freezing " << *dir << dendl; | |
415 | dir->auth_pin(this); | |
416 | pinned_dirs.push_back(dir); | |
417 | } | |
418 | } | |
419 | ||
420 | map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
421 | while (p != export_state.end()) { | |
422 | map<CDir*,export_state_t>::iterator next = p; | |
423 | ++next; | |
424 | CDir *dir = p->first; | |
425 | ||
426 | // abort exports: | |
427 | // - that are going to the failed node | |
428 | // - that aren't frozen yet (to avoid auth_pin deadlock) | |
429 | // - they havne't prepped yet (they may need to discover bounds to do that) | |
430 | if ((p->second.peer == who && | |
431 | p->second.state != EXPORT_CANCELLING) || | |
432 | p->second.state == EXPORT_LOCKING || | |
433 | p->second.state == EXPORT_DISCOVERING || | |
434 | p->second.state == EXPORT_FREEZING || | |
435 | p->second.state == EXPORT_PREPPING) { | |
436 | // the guy i'm exporting to failed, or we're just freezing. | |
437 | dout(10) << "cleaning up export state (" << p->second.state << ")" | |
438 | << get_export_statename(p->second.state) << " of " << *dir << dendl; | |
439 | export_try_cancel(dir); | |
440 | } else if (p->second.peer != who) { | |
441 | // bystander failed. | |
442 | if (p->second.warning_ack_waiting.erase(who)) { | |
443 | if (p->second.state == EXPORT_WARNING) { | |
444 | p->second.notify_ack_waiting.erase(who); // they won't get a notify either. | |
445 | // exporter waiting for warning acks, let's fake theirs. | |
446 | dout(10) << "faking export_warning_ack from mds." << who | |
447 | << " on " << *dir << " to mds." << p->second.peer | |
448 | << dendl; | |
449 | if (p->second.warning_ack_waiting.empty()) | |
450 | export_go(dir); | |
451 | } | |
452 | } | |
453 | if (p->second.notify_ack_waiting.erase(who)) { | |
454 | // exporter is waiting for notify acks, fake it | |
455 | dout(10) << "faking export_notify_ack from mds." << who | |
456 | << " on " << *dir << " to mds." << p->second.peer | |
457 | << dendl; | |
458 | if (p->second.state == EXPORT_NOTIFYING) { | |
459 | if (p->second.notify_ack_waiting.empty()) | |
460 | export_finish(dir); | |
461 | } else if (p->second.state == EXPORT_CANCELLING) { | |
462 | if (p->second.notify_ack_waiting.empty()) { | |
91327a77 | 463 | export_cancel_finish(p); |
7c673cae FG |
464 | } |
465 | } | |
466 | } | |
467 | } | |
468 | ||
469 | // next! | |
470 | p = next; | |
471 | } | |
472 | ||
473 | ||
474 | // check my imports | |
475 | map<dirfrag_t,import_state_t>::iterator q = import_state.begin(); | |
476 | while (q != import_state.end()) { | |
477 | map<dirfrag_t,import_state_t>::iterator next = q; | |
478 | ++next; | |
479 | dirfrag_t df = q->first; | |
f67539c2 TL |
480 | CInode *diri = mdcache->get_inode(df.ino); |
481 | CDir *dir = mdcache->get_dirfrag(df); | |
7c673cae FG |
482 | |
483 | if (q->second.peer == who) { | |
484 | if (dir) | |
485 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
486 | << get_import_statename(q->second.state) << " of " << *dir << dendl; | |
487 | else | |
488 | dout(10) << "cleaning up import state (" << q->second.state << ")" | |
489 | << get_import_statename(q->second.state) << " of " << df << dendl; | |
490 | ||
491 | switch (q->second.state) { | |
492 | case IMPORT_DISCOVERING: | |
493 | dout(10) << "import state=discovering : clearing state" << dendl; | |
494 | import_reverse_discovering(df); | |
495 | break; | |
496 | ||
497 | case IMPORT_DISCOVERED: | |
11fdf7f2 | 498 | ceph_assert(diri); |
7c673cae FG |
499 | dout(10) << "import state=discovered : unpinning inode " << *diri << dendl; |
500 | import_reverse_discovered(df, diri); | |
501 | break; | |
502 | ||
503 | case IMPORT_PREPPING: | |
11fdf7f2 | 504 | ceph_assert(dir); |
7c673cae | 505 | dout(10) << "import state=prepping : unpinning base+bounds " << *dir << dendl; |
b32b8144 | 506 | import_reverse_prepping(dir, q->second); |
7c673cae FG |
507 | break; |
508 | ||
509 | case IMPORT_PREPPED: | |
11fdf7f2 | 510 | ceph_assert(dir); |
7c673cae FG |
511 | dout(10) << "import state=prepped : unpinning base+bounds, unfreezing " << *dir << dendl; |
512 | { | |
513 | set<CDir*> bounds; | |
f67539c2 | 514 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
515 | import_remove_pins(dir, bounds); |
516 | ||
517 | // adjust auth back to the exporter | |
f67539c2 | 518 | mdcache->adjust_subtree_auth(dir, q->second.peer); |
7c673cae FG |
519 | |
520 | // notify bystanders ; wait in aborting state | |
b32b8144 | 521 | q->second.state = IMPORT_ABORTING; |
7c673cae | 522 | import_notify_abort(dir, bounds); |
11fdf7f2 | 523 | ceph_assert(g_conf()->mds_kill_import_at != 10); |
7c673cae FG |
524 | } |
525 | break; | |
526 | ||
527 | case IMPORT_LOGGINGSTART: | |
11fdf7f2 | 528 | ceph_assert(dir); |
7c673cae FG |
529 | dout(10) << "import state=loggingstart : reversing import on " << *dir << dendl; |
530 | import_reverse(dir); | |
531 | break; | |
532 | ||
533 | case IMPORT_ACKING: | |
11fdf7f2 | 534 | ceph_assert(dir); |
7c673cae FG |
535 | // hrm. make this an ambiguous import, and wait for exporter recovery to disambiguate |
536 | dout(10) << "import state=acking : noting ambiguous import " << *dir << dendl; | |
537 | { | |
538 | set<CDir*> bounds; | |
f67539c2 TL |
539 | mdcache->get_subtree_bounds(dir, bounds); |
540 | mdcache->add_ambiguous_import(dir, bounds); | |
7c673cae FG |
541 | } |
542 | break; | |
543 | ||
544 | case IMPORT_FINISHING: | |
11fdf7f2 | 545 | ceph_assert(dir); |
7c673cae FG |
546 | dout(10) << "import state=finishing : finishing import on " << *dir << dendl; |
547 | import_finish(dir, true); | |
548 | break; | |
549 | ||
550 | case IMPORT_ABORTING: | |
11fdf7f2 | 551 | ceph_assert(dir); |
7c673cae FG |
552 | dout(10) << "import state=aborting : ignoring repeat failure " << *dir << dendl; |
553 | break; | |
554 | } | |
555 | } else { | |
556 | auto bystanders_entry = q->second.bystanders.find(who); | |
557 | if (bystanders_entry != q->second.bystanders.end()) { | |
558 | q->second.bystanders.erase(bystanders_entry); | |
559 | if (q->second.state == IMPORT_ABORTING) { | |
11fdf7f2 | 560 | ceph_assert(dir); |
7c673cae FG |
561 | dout(10) << "faking export_notify_ack from mds." << who |
562 | << " on aborting import " << *dir << " from mds." << q->second.peer | |
563 | << dendl; | |
224ce89b | 564 | if (q->second.bystanders.empty()) |
7c673cae | 565 | import_reverse_unfreeze(dir); |
7c673cae FG |
566 | } |
567 | } | |
568 | } | |
569 | ||
570 | // next! | |
571 | q = next; | |
572 | } | |
573 | ||
9f95a23c | 574 | for (const auto& dir : pinned_dirs) { |
7c673cae FG |
575 | dout(10) << "removing temp auth_pin on " << *dir << dendl; |
576 | dir->auth_unpin(this); | |
7c673cae FG |
577 | } |
578 | } | |
579 | ||
580 | ||
581 | ||
582 | void Migrator::show_importing() | |
583 | { | |
9f95a23c | 584 | dout(10) << dendl; |
7c673cae FG |
585 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); |
586 | p != import_state.end(); | |
587 | ++p) { | |
f67539c2 | 588 | CDir *dir = mdcache->get_dirfrag(p->first); |
7c673cae FG |
589 | if (dir) { |
590 | dout(10) << " importing from " << p->second.peer | |
591 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
592 | << " " << p->first << " " << *dir << dendl; | |
593 | } else { | |
594 | dout(10) << " importing from " << p->second.peer | |
595 | << ": (" << p->second.state << ") " << get_import_statename(p->second.state) | |
596 | << " " << p->first << dendl; | |
597 | } | |
598 | } | |
599 | } | |
600 | ||
601 | void Migrator::show_exporting() | |
602 | { | |
9f95a23c TL |
603 | dout(10) << dendl; |
604 | for (const auto& [dir, state] : export_state) { | |
605 | dout(10) << " exporting to " << state.peer | |
606 | << ": (" << state.state << ") " << get_export_statename(state.state) | |
607 | << " " << dir->dirfrag() << " " << *dir << dendl; | |
608 | } | |
7c673cae FG |
609 | } |
610 | ||
611 | ||
612 | ||
613 | void Migrator::audit() | |
614 | { | |
11fdf7f2 | 615 | if (!g_conf()->subsys.should_gather<ceph_subsys_mds, 5>()) |
7c673cae FG |
616 | return; // hrm. |
617 | ||
618 | // import_state | |
619 | show_importing(); | |
620 | for (map<dirfrag_t,import_state_t>::iterator p = import_state.begin(); | |
621 | p != import_state.end(); | |
622 | ++p) { | |
623 | if (p->second.state == IMPORT_DISCOVERING) | |
624 | continue; | |
625 | if (p->second.state == IMPORT_DISCOVERED) { | |
f67539c2 | 626 | CInode *in = mdcache->get_inode(p->first.ino); |
11fdf7f2 | 627 | ceph_assert(in); |
7c673cae FG |
628 | continue; |
629 | } | |
f67539c2 | 630 | CDir *dir = mdcache->get_dirfrag(p->first); |
11fdf7f2 | 631 | ceph_assert(dir); |
7c673cae FG |
632 | if (p->second.state == IMPORT_PREPPING) |
633 | continue; | |
634 | if (p->second.state == IMPORT_ABORTING) { | |
11fdf7f2 TL |
635 | ceph_assert(!dir->is_ambiguous_dir_auth()); |
636 | ceph_assert(dir->get_dir_auth().first != mds->get_nodeid()); | |
7c673cae FG |
637 | continue; |
638 | } | |
11fdf7f2 TL |
639 | ceph_assert(dir->is_ambiguous_dir_auth()); |
640 | ceph_assert(dir->authority().first == mds->get_nodeid() || | |
7c673cae FG |
641 | dir->authority().second == mds->get_nodeid()); |
642 | } | |
643 | ||
644 | // export_state | |
645 | show_exporting(); | |
646 | for (map<CDir*,export_state_t>::iterator p = export_state.begin(); | |
647 | p != export_state.end(); | |
648 | ++p) { | |
649 | CDir *dir = p->first; | |
650 | if (p->second.state == EXPORT_LOCKING || | |
651 | p->second.state == EXPORT_DISCOVERING || | |
652 | p->second.state == EXPORT_FREEZING || | |
653 | p->second.state == EXPORT_CANCELLING) | |
654 | continue; | |
11fdf7f2 TL |
655 | ceph_assert(dir->is_ambiguous_dir_auth()); |
656 | ceph_assert(dir->authority().first == mds->get_nodeid() || | |
7c673cae FG |
657 | dir->authority().second == mds->get_nodeid()); |
658 | } | |
659 | ||
660 | // ambiguous+me subtrees should be importing|exporting | |
661 | ||
662 | // write me | |
663 | } | |
664 | ||
665 | ||
666 | ||
667 | ||
668 | ||
669 | // ========================================================== | |
670 | // EXPORT | |
671 | ||
672 | void Migrator::export_dir_nicely(CDir *dir, mds_rank_t dest) | |
673 | { | |
674 | // enqueue | |
9f95a23c | 675 | dout(7) << *dir << " to " << dest << dendl; |
7c673cae FG |
676 | export_queue.push_back(pair<dirfrag_t,mds_rank_t>(dir->dirfrag(), dest)); |
677 | ||
678 | maybe_do_queued_export(); | |
679 | } | |
680 | ||
681 | void Migrator::maybe_do_queued_export() | |
682 | { | |
683 | static bool running; | |
684 | if (running) | |
685 | return; | |
686 | running = true; | |
91327a77 AA |
687 | |
688 | uint64_t max_total_size = max_export_size * 2; | |
689 | ||
7c673cae | 690 | while (!export_queue.empty() && |
91327a77 AA |
691 | max_total_size > total_exporting_size && |
692 | max_total_size - total_exporting_size >= | |
693 | max_export_size * (num_locking_exports + 1)) { | |
694 | ||
7c673cae FG |
695 | dirfrag_t df = export_queue.front().first; |
696 | mds_rank_t dest = export_queue.front().second; | |
697 | export_queue.pop_front(); | |
698 | ||
f67539c2 | 699 | CDir *dir = mdcache->get_dirfrag(df); |
7c673cae FG |
700 | if (!dir) continue; |
701 | if (!dir->is_auth()) continue; | |
702 | ||
9f95a23c | 703 | dout(7) << "nicely exporting to mds." << dest << " " << *dir << dendl; |
7c673cae FG |
704 | |
705 | export_dir(dir, dest); | |
706 | } | |
91327a77 | 707 | |
7c673cae FG |
708 | running = false; |
709 | } | |
710 | ||
711 | ||
712 | ||
713 | ||
714 | class C_MDC_ExportFreeze : public MigratorContext { | |
9f95a23c | 715 | CDir *dir; // dir i'm exporting |
7c673cae FG |
716 | uint64_t tid; |
717 | public: | |
718 | C_MDC_ExportFreeze(Migrator *m, CDir *e, uint64_t t) : | |
9f95a23c TL |
719 | MigratorContext(m), dir(e), tid(t) { |
720 | dir->get(CDir::PIN_PTRWAITER); | |
721 | } | |
7c673cae FG |
722 | void finish(int r) override { |
723 | if (r >= 0) | |
9f95a23c TL |
724 | mig->export_frozen(dir, tid); |
725 | dir->put(CDir::PIN_PTRWAITER); | |
7c673cae FG |
726 | } |
727 | }; | |
728 | ||
729 | ||
9f95a23c | 730 | bool Migrator::export_try_grab_locks(CDir *dir, MutationRef& mut) |
7c673cae | 731 | { |
9f95a23c | 732 | CInode *diri = dir->get_inode(); |
11fdf7f2 | 733 | |
9f95a23c TL |
734 | if (!diri->filelock.can_wrlock(diri->get_loner()) || |
735 | !diri->nestlock.can_wrlock(diri->get_loner())) | |
736 | return false; | |
11fdf7f2 | 737 | |
9f95a23c | 738 | MutationImpl::LockOpVec lov; |
11fdf7f2 | 739 | |
9f95a23c TL |
740 | set<CDir*> wouldbe_bounds; |
741 | set<CInode*> bound_inodes; | |
f67539c2 | 742 | mdcache->get_wouldbe_subtree_bounds(dir, wouldbe_bounds); |
9f95a23c TL |
743 | for (auto& bound : wouldbe_bounds) |
744 | bound_inodes.insert(bound->get_inode()); | |
745 | for (auto& in : bound_inodes) | |
746 | lov.add_rdlock(&in->dirfragtreelock); | |
747 | ||
748 | lov.add_rdlock(&diri->dirfragtreelock); | |
749 | ||
750 | CInode* in = diri; | |
751 | while (true) { | |
752 | lov.add_rdlock(&in->snaplock); | |
753 | CDentry* pdn = in->get_projected_parent_dn(); | |
754 | if (!pdn) | |
755 | break; | |
756 | in = pdn->get_dir()->get_inode(); | |
757 | } | |
7c673cae | 758 | |
9f95a23c TL |
759 | if (!mds->locker->rdlock_try_set(lov, mut)) |
760 | return false; | |
7c673cae | 761 | |
9f95a23c TL |
762 | mds->locker->wrlock_force(&diri->filelock, mut); |
763 | mds->locker->wrlock_force(&diri->nestlock, mut); | |
11fdf7f2 | 764 | |
9f95a23c | 765 | return true; |
7c673cae FG |
766 | } |
767 | ||
768 | ||
7c673cae FG |
769 | /** export_dir(dir, dest) |
770 | * public method to initiate an export. | |
771 | * will fail if the directory is freezing, frozen, unpinnable, or root. | |
772 | */ | |
773 | void Migrator::export_dir(CDir *dir, mds_rank_t dest) | |
774 | { | |
11fdf7f2 TL |
775 | ceph_assert(dir->is_auth()); |
776 | ceph_assert(dest != mds->get_nodeid()); | |
7c673cae | 777 | |
9f95a23c | 778 | CDir* parent = dir->inode->get_projected_parent_dir(); |
f67539c2 | 779 | if (!mds->is_stopping() && !dir->is_exportable(dest) && dir->get_num_head_items() > 0) { |
9f95a23c | 780 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": dir is export pinned" << dendl; |
81eedcae | 781 | return; |
9f95a23c TL |
782 | } else if (!(mds->is_active() || mds->is_stopping())) { |
783 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": not active" << dendl; | |
181888fb | 784 | return; |
f67539c2 | 785 | } else if (mdcache->is_readonly()) { |
9f95a23c | 786 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": read-only FS, no exports for now" << dendl; |
7c673cae | 787 | return; |
9f95a23c TL |
788 | } else if (!mds->mdsmap->is_active(dest)) { |
789 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": destination not active" << dendl; | |
31f18b77 | 790 | return; |
9f95a23c TL |
791 | } else if (mds->is_cluster_degraded()) { |
792 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": cluster degraded" << dendl; | |
7c673cae | 793 | return; |
9f95a23c TL |
794 | } else if (dir->inode->is_system()) { |
795 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": is a system directory" << dendl; | |
7c673cae | 796 | return; |
9f95a23c TL |
797 | } else if (dir->is_frozen() || dir->is_freezing()) { |
798 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": is frozen" << dendl; | |
7c673cae | 799 | return; |
9f95a23c TL |
800 | } else if (dir->state_test(CDir::STATE_EXPORTING)) { |
801 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": already exporting" << dendl; | |
802 | return; | |
803 | } else if (parent && parent->inode->is_stray() | |
804 | && parent->get_parent_dir()->ino() != MDS_INO_MDSDIR(dest)) { | |
805 | dout(7) << "Cannot export to mds." << dest << " " << *dir << ": in stray directory" << dendl; | |
7c673cae FG |
806 | return; |
807 | } | |
808 | ||
9f95a23c | 809 | if (unlikely(g_conf()->mds_thrash_exports)) { |
7c673cae | 810 | // create random subtree bound (which will not be exported) |
9f95a23c | 811 | std::vector<CDir*> ls; |
7c673cae FG |
812 | for (auto p = dir->begin(); p != dir->end(); ++p) { |
813 | auto dn = p->second; | |
814 | CDentry::linkage_t *dnl= dn->get_linkage(); | |
815 | if (dnl->is_primary()) { | |
816 | CInode *in = dnl->get_inode(); | |
9f95a23c TL |
817 | if (in->is_dir()) { |
818 | auto&& dirs = in->get_nested_dirfrags(); | |
819 | ls.insert(std::end(ls), std::begin(dirs), std::end(dirs)); | |
820 | } | |
7c673cae FG |
821 | } |
822 | } | |
823 | if (ls.size() > 0) { | |
824 | int n = rand() % ls.size(); | |
825 | auto p = ls.begin(); | |
826 | while (n--) ++p; | |
827 | CDir *bd = *p; | |
828 | if (!(bd->is_frozen() || bd->is_freezing())) { | |
11fdf7f2 | 829 | ceph_assert(bd->is_auth()); |
7c673cae | 830 | dir->state_set(CDir::STATE_AUXSUBTREE); |
f67539c2 | 831 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid()); |
9f95a23c | 832 | dout(7) << "create aux subtree " << *bd << " under " << *dir << dendl; |
7c673cae FG |
833 | } |
834 | } | |
835 | } | |
836 | ||
9f95a23c TL |
837 | dout(4) << "Starting export to mds." << dest << " " << *dir << dendl; |
838 | ||
11fdf7f2 | 839 | mds->hit_export_target(dest, -1); |
7c673cae FG |
840 | |
841 | dir->auth_pin(this); | |
1adf2230 | 842 | dir->mark_exporting(); |
7c673cae | 843 | |
f67539c2 | 844 | MDRequestRef mdr = mdcache->request_start_internal(CEPH_MDS_OP_EXPORTDIR); |
7c673cae | 845 | mdr->more()->export_dir = dir; |
9f95a23c | 846 | mdr->pin(dir); |
7c673cae | 847 | |
11fdf7f2 | 848 | ceph_assert(export_state.count(dir) == 0); |
7c673cae | 849 | export_state_t& stat = export_state[dir]; |
91327a77 | 850 | num_locking_exports++; |
7c673cae FG |
851 | stat.state = EXPORT_LOCKING; |
852 | stat.peer = dest; | |
853 | stat.tid = mdr->reqid.tid; | |
854 | stat.mut = mdr; | |
855 | ||
f67539c2 | 856 | mdcache->dispatch_request(mdr); |
7c673cae FG |
857 | } |
858 | ||
91327a77 AA |
859 | /* |
860 | * check if directory is too large to be export in whole. If it is, | |
861 | * choose some subdirs, whose total size is suitable. | |
862 | */ | |
863 | void Migrator::maybe_split_export(CDir* dir, uint64_t max_size, bool null_okay, | |
864 | vector<pair<CDir*, size_t> >& results) | |
7c673cae | 865 | { |
91327a77 AA |
866 | static const unsigned frag_size = 800; |
867 | static const unsigned inode_size = 1000; | |
868 | static const unsigned cap_size = 80; | |
869 | static const unsigned remote_size = 10; | |
870 | static const unsigned null_size = 1; | |
871 | ||
872 | // state for depth-first search | |
873 | struct LevelData { | |
874 | CDir *dir; | |
875 | CDir::dentry_key_map::iterator iter; | |
876 | size_t dirfrag_size = frag_size; | |
877 | size_t subdirs_size = 0; | |
878 | bool complete = true; | |
879 | vector<CDir*> siblings; | |
880 | vector<pair<CDir*, size_t> > subdirs; | |
881 | LevelData(const LevelData&) = default; | |
882 | LevelData(CDir *d) : | |
883 | dir(d), iter(d->begin()) {} | |
884 | }; | |
885 | ||
886 | vector<LevelData> stack; | |
887 | stack.emplace_back(dir); | |
888 | ||
889 | size_t found_size = 0; | |
890 | size_t skipped_size = 0; | |
891 | ||
892 | for (;;) { | |
893 | auto& data = stack.back(); | |
894 | CDir *cur = data.dir; | |
895 | auto& it = data.iter; | |
896 | auto& dirfrag_size = data.dirfrag_size; | |
897 | ||
898 | while(it != cur->end()) { | |
899 | CDentry *dn = it->second; | |
900 | ++it; | |
901 | ||
902 | dirfrag_size += dn->name.size(); | |
903 | if (dn->get_linkage()->is_null()) { | |
904 | dirfrag_size += null_size; | |
905 | continue; | |
906 | } | |
907 | if (dn->get_linkage()->is_remote()) { | |
908 | dirfrag_size += remote_size; | |
909 | continue; | |
910 | } | |
911 | ||
912 | CInode *in = dn->get_linkage()->get_inode(); | |
913 | dirfrag_size += inode_size; | |
914 | dirfrag_size += in->get_client_caps().size() * cap_size; | |
915 | ||
916 | if (in->is_dir()) { | |
9f95a23c | 917 | auto ls = in->get_nested_dirfrags(); |
91327a77 AA |
918 | std::reverse(ls.begin(), ls.end()); |
919 | ||
920 | bool complete = true; | |
921 | for (auto p = ls.begin(); p != ls.end(); ) { | |
922 | if ((*p)->state_test(CDir::STATE_EXPORTING) || | |
923 | (*p)->is_freezing_dir() || (*p)->is_frozen_dir()) { | |
924 | complete = false; | |
925 | p = ls.erase(p); | |
926 | } else { | |
927 | ++p; | |
928 | } | |
929 | } | |
930 | if (!complete) { | |
931 | // skip exporting dir's ancestors. because they can't get | |
932 | // frozen (exporting dir's parent inode is auth pinned). | |
933 | for (auto p = stack.rbegin(); p < stack.rend(); ++p) { | |
934 | if (!p->complete) | |
935 | break; | |
936 | p->complete = false; | |
937 | } | |
938 | } | |
939 | if (!ls.empty()) { | |
940 | stack.emplace_back(ls.back()); | |
941 | ls.pop_back(); | |
942 | stack.back().siblings.swap(ls); | |
943 | break; | |
944 | } | |
945 | } | |
946 | } | |
947 | // did above loop push new dirfrag into the stack? | |
948 | if (stack.back().dir != cur) | |
949 | continue; | |
950 | ||
951 | if (data.complete) { | |
952 | auto cur_size = data.subdirs_size + dirfrag_size; | |
953 | // we can do nothing with large dirfrag | |
954 | if (cur_size >= max_size && found_size * 2 > max_size) | |
955 | break; | |
7c673cae | 956 | |
91327a77 AA |
957 | found_size += dirfrag_size; |
958 | ||
959 | if (stack.size() > 1) { | |
960 | auto& parent = stack[stack.size() - 2]; | |
961 | parent.subdirs.emplace_back(cur, cur_size); | |
962 | parent.subdirs_size += cur_size; | |
963 | } | |
964 | } else { | |
965 | // can't merge current dirfrag to its parent if there is skipped subdir | |
966 | results.insert(results.end(), data.subdirs.begin(), data.subdirs.end()); | |
967 | skipped_size += dirfrag_size; | |
968 | } | |
969 | ||
970 | vector<CDir*> ls; | |
971 | ls.swap(data.siblings); | |
972 | ||
973 | stack.pop_back(); | |
974 | if (stack.empty()) | |
975 | break; | |
976 | ||
977 | if (found_size >= max_size) | |
978 | break; | |
979 | ||
980 | // next dirfrag | |
981 | if (!ls.empty()) { | |
982 | stack.emplace_back(ls.back()); | |
983 | ls.pop_back(); | |
984 | stack.back().siblings.swap(ls); | |
985 | } | |
986 | } | |
987 | ||
988 | for (auto& p : stack) | |
989 | results.insert(results.end(), p.subdirs.begin(), p.subdirs.end()); | |
990 | ||
991 | if (results.empty() && (!skipped_size || !null_okay)) | |
992 | results.emplace_back(dir, found_size + skipped_size); | |
993 | } | |
994 | ||
995 | class C_M_ExportDirWait : public MigratorContext { | |
996 | MDRequestRef mdr; | |
997 | int count; | |
998 | public: | |
999 | C_M_ExportDirWait(Migrator *m, MDRequestRef mdr, int count) | |
1000 | : MigratorContext(m), mdr(mdr), count(count) {} | |
1001 | void finish(int r) override { | |
1002 | mig->dispatch_export_dir(mdr, count); | |
1003 | } | |
1004 | }; | |
1005 | ||
1006 | void Migrator::dispatch_export_dir(MDRequestRef& mdr, int count) | |
1007 | { | |
7c673cae | 1008 | CDir *dir = mdr->more()->export_dir; |
9f95a23c | 1009 | dout(7) << *mdr << " " << *dir << dendl; |
91327a77 | 1010 | |
7c673cae FG |
1011 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); |
1012 | if (it == export_state.end() || it->second.tid != mdr->reqid.tid) { | |
1013 | // export must have aborted. | |
1014 | dout(7) << "export must have aborted " << *mdr << dendl; | |
11fdf7f2 | 1015 | ceph_assert(mdr->killed || mdr->aborted); |
91327a77 AA |
1016 | if (mdr->aborted) { |
1017 | mdr->aborted = false; | |
f67539c2 | 1018 | mdcache->request_kill(mdr); |
91327a77 | 1019 | } |
7c673cae FG |
1020 | return; |
1021 | } | |
11fdf7f2 | 1022 | ceph_assert(it->second.state == EXPORT_LOCKING); |
7c673cae | 1023 | |
f67539c2 | 1024 | if (mdr->more()->peer_error || dir->is_frozen() || dir->is_freezing()) { |
9f95a23c TL |
1025 | dout(7) << "wouldblock|freezing|frozen, canceling export" << dendl; |
1026 | export_try_cancel(dir); | |
1027 | return; | |
1028 | } | |
7c673cae | 1029 | |
9f95a23c | 1030 | mds_rank_t dest = it->second.peer; |
7c673cae FG |
1031 | if (!mds->is_export_target(dest)) { |
1032 | dout(7) << "dest is not yet an export target" << dendl; | |
1033 | if (count > 3) { | |
9f95a23c | 1034 | dout(7) << "dest has not been added as export target after three MDSMap epochs, canceling export" << dendl; |
7c673cae FG |
1035 | export_try_cancel(dir); |
1036 | return; | |
1037 | } | |
224ce89b WB |
1038 | |
1039 | mds->locker->drop_locks(mdr.get()); | |
1040 | mdr->drop_local_auth_pins(); | |
1041 | ||
31f18b77 | 1042 | mds->wait_for_mdsmap(mds->mdsmap->get_epoch(), new C_M_ExportDirWait(this, mdr, count+1)); |
7c673cae FG |
1043 | return; |
1044 | } | |
1045 | ||
1046 | if (!dir->inode->get_parent_dn()) { | |
1047 | dout(7) << "waiting for dir to become stable before export: " << *dir << dendl; | |
31f18b77 | 1048 | dir->add_waiter(CDir::WAIT_CREATED, new C_M_ExportDirWait(this, mdr, 1)); |
7c673cae FG |
1049 | return; |
1050 | } | |
1051 | ||
7c673cae | 1052 | // locks? |
9f95a23c TL |
1053 | if (!(mdr->locking_state & MutationImpl::ALL_LOCKED)) { |
1054 | MutationImpl::LockOpVec lov; | |
1055 | // If auth MDS of the subtree root inode is neither the exporter MDS | |
1056 | // nor the importer MDS and it gathers subtree root's fragstat/neststat | |
1057 | // while the subtree is exporting. It's possible that the exporter MDS | |
1058 | // and the importer MDS both are auth MDS of the subtree root or both | |
1059 | // are not auth MDS of the subtree root at the time they receive the | |
1060 | // lock messages. So the auth MDS of the subtree root inode may get no | |
1061 | // or duplicated fragstat/neststat for the subtree root dirfrag. | |
1062 | lov.lock_scatter_gather(&dir->get_inode()->filelock); | |
1063 | lov.lock_scatter_gather(&dir->get_inode()->nestlock); | |
1064 | if (dir->get_inode()->is_auth()) { | |
1065 | dir->get_inode()->filelock.set_scatter_wanted(); | |
1066 | dir->get_inode()->nestlock.set_scatter_wanted(); | |
1067 | } | |
1068 | lov.add_rdlock(&dir->get_inode()->dirfragtreelock); | |
1069 | ||
1070 | if (!mds->locker->acquire_locks(mdr, lov, nullptr, true)) { | |
1071 | if (mdr->aborted) | |
1072 | export_try_cancel(dir); | |
1073 | return; | |
1074 | } | |
1075 | ||
1076 | lov.clear(); | |
1077 | // bound dftlocks: | |
1078 | // NOTE: We need to take an rdlock on bounding dirfrags during | |
1079 | // migration for a rather irritating reason: when we export the | |
1080 | // bound inode, we need to send scatterlock state for the dirfrags | |
1081 | // as well, so that the new auth also gets the correct info. If we | |
1082 | // race with a refragment, this info is useless, as we can't | |
1083 | // redivvy it up. And it's needed for the scatterlocks to work | |
1084 | // properly: when the auth is in a sync/lock state it keeps each | |
1085 | // dirfrag's portion in the local (auth OR replica) dirfrag. | |
1086 | set<CDir*> wouldbe_bounds; | |
1087 | set<CInode*> bound_inodes; | |
f67539c2 | 1088 | mdcache->get_wouldbe_subtree_bounds(dir, wouldbe_bounds); |
9f95a23c TL |
1089 | for (auto& bound : wouldbe_bounds) |
1090 | bound_inodes.insert(bound->get_inode()); | |
1091 | for (auto& in : bound_inodes) | |
1092 | lov.add_rdlock(&in->dirfragtreelock); | |
1093 | ||
1094 | if (!mds->locker->rdlock_try_set(lov, mdr)) | |
1095 | return; | |
1096 | ||
1097 | if (!mds->locker->try_rdlock_snap_layout(dir->get_inode(), mdr)) | |
1098 | return; | |
1099 | ||
1100 | mdr->locking_state |= MutationImpl::ALL_LOCKED; | |
7c673cae FG |
1101 | } |
1102 | ||
11fdf7f2 | 1103 | ceph_assert(g_conf()->mds_kill_export_at != 1); |
7c673cae | 1104 | |
91327a77 AA |
1105 | auto parent = it->second.parent; |
1106 | ||
1107 | vector<pair<CDir*, size_t> > results; | |
1108 | maybe_split_export(dir, max_export_size, (bool)parent, results); | |
1109 | ||
1110 | if (results.size() == 1 && results.front().first == dir) { | |
1111 | num_locking_exports--; | |
1112 | it->second.state = EXPORT_DISCOVERING; | |
1113 | // send ExportDirDiscover (ask target) | |
1114 | filepath path; | |
1115 | dir->inode->make_path(path); | |
9f95a23c TL |
1116 | auto discover = make_message<MExportDirDiscover>(dir->dirfrag(), path, |
1117 | mds->get_nodeid(), | |
1118 | it->second.tid); | |
91327a77 | 1119 | mds->send_message_mds(discover, dest); |
11fdf7f2 | 1120 | ceph_assert(g_conf()->mds_kill_export_at != 2); |
91327a77 AA |
1121 | |
1122 | it->second.last_cum_auth_pins_change = ceph_clock_now(); | |
1123 | it->second.approx_size = results.front().second; | |
91327a77 AA |
1124 | total_exporting_size += it->second.approx_size; |
1125 | ||
1126 | // start the freeze, but hold it up with an auth_pin. | |
1127 | dir->freeze_tree(); | |
11fdf7f2 | 1128 | ceph_assert(dir->is_freezing_tree()); |
91327a77 AA |
1129 | dir->add_waiter(CDir::WAIT_FROZEN, new C_MDC_ExportFreeze(this, dir, it->second.tid)); |
1130 | return; | |
1131 | } | |
1132 | ||
1133 | if (parent) { | |
1134 | parent->pending_children += results.size(); | |
1135 | } else { | |
1136 | parent = std::make_shared<export_base_t>(dir->dirfrag(), dest, | |
1137 | results.size(), export_queue_gen); | |
1138 | } | |
1139 | ||
1140 | if (results.empty()) { | |
1141 | dout(7) << "subtree's children all are under exporting, retry rest parts of parent export " | |
1142 | << parent->dirfrag << dendl; | |
1143 | parent->restart = true; | |
1144 | } else { | |
1145 | dout(7) << "subtree is too large, splitting it into: " << dendl; | |
1146 | } | |
1147 | ||
1148 | for (auto& p : results) { | |
1149 | CDir *sub = p.first; | |
11fdf7f2 | 1150 | ceph_assert(sub != dir); |
91327a77 AA |
1151 | dout(7) << " sub " << *sub << dendl; |
1152 | ||
1153 | sub->auth_pin(this); | |
1154 | sub->mark_exporting(); | |
1155 | ||
f67539c2 | 1156 | MDRequestRef _mdr = mdcache->request_start_internal(CEPH_MDS_OP_EXPORTDIR); |
91327a77 | 1157 | _mdr->more()->export_dir = sub; |
9f95a23c | 1158 | _mdr->pin(sub); |
91327a77 | 1159 | |
11fdf7f2 | 1160 | ceph_assert(export_state.count(sub) == 0); |
91327a77 AA |
1161 | auto& stat = export_state[sub]; |
1162 | num_locking_exports++; | |
1163 | stat.state = EXPORT_LOCKING; | |
1164 | stat.peer = dest; | |
1165 | stat.tid = _mdr->reqid.tid; | |
1166 | stat.mut = _mdr; | |
1167 | stat.parent = parent; | |
f67539c2 | 1168 | mdcache->dispatch_request(_mdr); |
91327a77 AA |
1169 | } |
1170 | ||
1171 | // cancel the original one | |
1172 | export_try_cancel(dir); | |
1173 | } | |
1174 | ||
91327a77 AA |
1175 | void Migrator::child_export_finish(std::shared_ptr<export_base_t>& parent, bool success) |
1176 | { | |
1177 | if (success) | |
1178 | parent->restart = true; | |
1179 | if (--parent->pending_children == 0) { | |
1180 | if (parent->restart && | |
1181 | parent->export_queue_gen == export_queue_gen) { | |
f67539c2 | 1182 | CDir *origin = mdcache->get_dirfrag(parent->dirfrag); |
91327a77 AA |
1183 | if (origin && origin->is_auth()) { |
1184 | dout(7) << "child_export_finish requeue " << *origin << dendl; | |
1185 | export_queue.emplace_front(origin->dirfrag(), parent->dest); | |
1186 | } | |
1187 | } | |
1188 | } | |
7c673cae FG |
1189 | } |
1190 | ||
1191 | /* | |
1192 | * called on receipt of MExportDirDiscoverAck | |
1193 | * the importer now has the directory's _inode_ in memory, and pinned. | |
7c673cae | 1194 | */ |
9f95a23c | 1195 | void Migrator::handle_export_discover_ack(const cref_t<MExportDirDiscoverAck> &m) |
7c673cae | 1196 | { |
f67539c2 | 1197 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1198 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 1199 | ceph_assert(dir); |
7c673cae | 1200 | |
9f95a23c | 1201 | dout(7) << "from " << m->get_source() |
7c673cae FG |
1202 | << " on " << *dir << dendl; |
1203 | ||
11fdf7f2 | 1204 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1205 | |
1206 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1207 | if (it == export_state.end() || | |
1208 | it->second.tid != m->get_tid() || | |
1209 | it->second.peer != dest) { | |
1210 | dout(7) << "must have aborted" << dendl; | |
1211 | } else { | |
11fdf7f2 | 1212 | ceph_assert(it->second.state == EXPORT_DISCOVERING); |
c07f9fc5 FG |
1213 | |
1214 | if (m->is_success()) { | |
1215 | // release locks to avoid deadlock | |
1216 | MDRequestRef mdr = static_cast<MDRequestImpl*>(it->second.mut.get()); | |
11fdf7f2 | 1217 | ceph_assert(mdr); |
f67539c2 | 1218 | mdcache->request_finish(mdr); |
c07f9fc5 FG |
1219 | it->second.mut.reset(); |
1220 | // freeze the subtree | |
1221 | it->second.state = EXPORT_FREEZING; | |
1222 | dir->auth_unpin(this); | |
11fdf7f2 | 1223 | ceph_assert(g_conf()->mds_kill_export_at != 3); |
c07f9fc5 FG |
1224 | |
1225 | } else { | |
1226 | dout(7) << "peer failed to discover (not active?), canceling" << dendl; | |
1227 | export_try_cancel(dir, false); | |
1228 | } | |
7c673cae | 1229 | } |
7c673cae FG |
1230 | } |
1231 | ||
1232 | class C_M_ExportSessionsFlushed : public MigratorContext { | |
1233 | CDir *dir; | |
1234 | uint64_t tid; | |
1235 | public: | |
9f95a23c TL |
1236 | C_M_ExportSessionsFlushed(Migrator *m, CDir *d, uint64_t t) : |
1237 | MigratorContext(m), dir(d), tid(t) { | |
1238 | dir->get(CDir::PIN_PTRWAITER); | |
7c673cae FG |
1239 | } |
1240 | void finish(int r) override { | |
1241 | mig->export_sessions_flushed(dir, tid); | |
9f95a23c | 1242 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
1243 | } |
1244 | }; | |
1245 | ||
1246 | void Migrator::export_sessions_flushed(CDir *dir, uint64_t tid) | |
1247 | { | |
9f95a23c | 1248 | dout(7) << *dir << dendl; |
7c673cae FG |
1249 | |
1250 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1251 | if (it == export_state.end() || | |
1252 | it->second.state == EXPORT_CANCELLING || | |
1253 | it->second.tid != tid) { | |
1254 | // export must have aborted. | |
1255 | dout(7) << "export must have aborted on " << dir << dendl; | |
1256 | return; | |
1257 | } | |
1258 | ||
11fdf7f2 TL |
1259 | ceph_assert(it->second.state == EXPORT_PREPPING || it->second.state == EXPORT_WARNING); |
1260 | ceph_assert(it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0); | |
7c673cae FG |
1261 | it->second.warning_ack_waiting.erase(MDS_RANK_NONE); |
1262 | if (it->second.state == EXPORT_WARNING && it->second.warning_ack_waiting.empty()) | |
1263 | export_go(dir); // start export. | |
1264 | } | |
1265 | ||
9f95a23c TL |
1266 | void Migrator::encode_export_prep_trace(bufferlist &final_bl, CDir *bound, |
1267 | CDir *dir, export_state_t &es, | |
1268 | set<inodeno_t> &inodes_added, | |
1269 | set<dirfrag_t> &dirfrags_added) | |
1270 | { | |
1271 | ENCODE_START(1, 1, final_bl); | |
1272 | ||
1273 | dout(7) << " started to encode dir " << *bound << dendl; | |
1274 | CDir *cur = bound; | |
1275 | bufferlist tracebl; | |
1276 | char start = '-'; | |
1277 | ||
1278 | while (1) { | |
1279 | // don't repeat inodes | |
1280 | if (inodes_added.count(cur->inode->ino())) | |
1281 | break; | |
1282 | inodes_added.insert(cur->inode->ino()); | |
1283 | ||
1284 | // prepend dentry + inode | |
1285 | ceph_assert(cur->inode->is_auth()); | |
1286 | bufferlist bl; | |
f67539c2 | 1287 | mdcache->encode_replica_dentry(cur->inode->parent, es.peer, bl); |
9f95a23c | 1288 | dout(7) << " added " << *cur->inode->parent << dendl; |
f67539c2 | 1289 | mdcache->encode_replica_inode(cur->inode, es.peer, bl, mds->mdsmap->get_up_features()); |
9f95a23c TL |
1290 | dout(7) << " added " << *cur->inode << dendl; |
1291 | bl.claim_append(tracebl); | |
f67539c2 | 1292 | tracebl = std::move(bl); |
9f95a23c TL |
1293 | |
1294 | cur = cur->get_parent_dir(); | |
1295 | // don't repeat dirfrags | |
1296 | if (dirfrags_added.count(cur->dirfrag()) || cur == dir) { | |
1297 | start = 'd'; // start with dentry | |
1298 | break; | |
1299 | } | |
1300 | dirfrags_added.insert(cur->dirfrag()); | |
1301 | ||
1302 | // prepend dir | |
f67539c2 | 1303 | mdcache->encode_replica_dir(cur, es.peer, bl); |
9f95a23c TL |
1304 | dout(7) << " added " << *cur << dendl; |
1305 | bl.claim_append(tracebl); | |
f67539c2 | 1306 | tracebl = std::move(bl); |
9f95a23c TL |
1307 | start = 'f'; // start with dirfrag |
1308 | } | |
1309 | dirfrag_t df = cur->dirfrag(); | |
1310 | encode(df, final_bl); | |
1311 | encode(start, final_bl); | |
1312 | final_bl.claim_append(tracebl); | |
1313 | ||
1314 | ENCODE_FINISH(final_bl); | |
1315 | } | |
1316 | ||
7c673cae FG |
1317 | void Migrator::export_frozen(CDir *dir, uint64_t tid) |
1318 | { | |
9f95a23c | 1319 | dout(7) << *dir << dendl; |
7c673cae FG |
1320 | |
1321 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1322 | if (it == export_state.end() || it->second.tid != tid) { | |
1323 | dout(7) << "export must have aborted" << dendl; | |
1324 | return; | |
1325 | } | |
1326 | ||
11fdf7f2 TL |
1327 | ceph_assert(it->second.state == EXPORT_FREEZING); |
1328 | ceph_assert(dir->is_frozen_tree_root()); | |
7c673cae | 1329 | |
9f95a23c | 1330 | it->second.mut = new MutationImpl(); |
7c673cae FG |
1331 | |
1332 | // ok, try to grab all my locks. | |
9f95a23c | 1333 | CInode *diri = dir->get_inode(); |
7c673cae | 1334 | if ((diri->is_auth() && diri->is_frozen()) || |
9f95a23c | 1335 | !export_try_grab_locks(dir, it->second.mut)) { |
7c673cae FG |
1336 | dout(7) << "export_dir couldn't acquire all needed locks, failing. " |
1337 | << *dir << dendl; | |
91327a77 | 1338 | export_try_cancel(dir); |
7c673cae FG |
1339 | return; |
1340 | } | |
1341 | ||
7c673cae FG |
1342 | if (diri->is_auth()) |
1343 | it->second.mut->auth_pin(diri); | |
7c673cae | 1344 | |
f67539c2 | 1345 | mdcache->show_subtrees(); |
7c673cae | 1346 | |
224ce89b | 1347 | // CDir::_freeze_tree() should have forced it into subtree. |
11fdf7f2 | 1348 | ceph_assert(dir->get_dir_auth() == mds_authority_t(mds->get_nodeid(), mds->get_nodeid())); |
7c673cae | 1349 | // note the bounds. |
7c673cae | 1350 | set<CDir*> bounds; |
f67539c2 | 1351 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1352 | |
1353 | // generate prep message, log entry. | |
9f95a23c | 1354 | auto prep = make_message<MExportDirPrep>(dir->dirfrag(), it->second.tid); |
7c673cae FG |
1355 | |
1356 | // include list of bystanders | |
181888fb FG |
1357 | for (const auto &p : dir->get_replicas()) { |
1358 | if (p.first != it->second.peer) { | |
1359 | dout(10) << "bystander mds." << p.first << dendl; | |
1360 | prep->add_bystander(p.first); | |
7c673cae FG |
1361 | } |
1362 | } | |
1363 | ||
1364 | // include base dirfrag | |
f67539c2 | 1365 | mdcache->encode_replica_dir(dir, it->second.peer, prep->basedir); |
7c673cae FG |
1366 | |
1367 | /* | |
1368 | * include spanning tree for all nested exports. | |
1369 | * these need to be on the destination _before_ the final export so that | |
1370 | * dir_auth updates on any nested exports are properly absorbed. | |
1371 | * this includes inodes and dirfrags included in the subtree, but | |
1372 | * only the inodes at the bounds. | |
1373 | * | |
1374 | * each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
1375 | */ | |
1376 | set<inodeno_t> inodes_added; | |
1377 | set<dirfrag_t> dirfrags_added; | |
1378 | ||
1379 | // check bounds | |
9f95a23c | 1380 | for (auto &bound : bounds){ |
7c673cae | 1381 | // pin it. |
91327a77 AA |
1382 | bound->get(CDir::PIN_EXPORTBOUND); |
1383 | bound->state_set(CDir::STATE_EXPORTBOUND); | |
9f95a23c | 1384 | |
7c673cae FG |
1385 | dout(7) << " export bound " << *bound << dendl; |
1386 | prep->add_bound( bound->dirfrag() ); | |
9f95a23c | 1387 | |
7c673cae | 1388 | bufferlist final_bl; |
9f95a23c | 1389 | encode_export_prep_trace(final_bl, bound, dir, it->second, inodes_added, dirfrags_added); |
7c673cae FG |
1390 | prep->add_trace(final_bl); |
1391 | } | |
1392 | ||
1393 | // send. | |
1394 | it->second.state = EXPORT_PREPPING; | |
1395 | mds->send_message_mds(prep, it->second.peer); | |
20effc67 | 1396 | ceph_assert(g_conf()->mds_kill_export_at != 4); |
7c673cae FG |
1397 | |
1398 | // make sure any new instantiations of caps are flushed out | |
11fdf7f2 | 1399 | ceph_assert(it->second.warning_ack_waiting.empty()); |
7c673cae | 1400 | |
91327a77 AA |
1401 | set<client_t> export_client_set; |
1402 | get_export_client_set(dir, export_client_set); | |
1403 | ||
7c673cae FG |
1404 | MDSGatherBuilder gather(g_ceph_context); |
1405 | mds->server->flush_client_sessions(export_client_set, gather); | |
1406 | if (gather.has_subs()) { | |
1407 | it->second.warning_ack_waiting.insert(MDS_RANK_NONE); | |
1408 | gather.set_finisher(new C_M_ExportSessionsFlushed(this, dir, it->second.tid)); | |
1409 | gather.activate(); | |
1410 | } | |
1411 | } | |
1412 | ||
91327a77 | 1413 | void Migrator::get_export_client_set(CDir *dir, set<client_t>& client_set) |
7c673cae | 1414 | { |
91327a77 | 1415 | deque<CDir*> dfs; |
7c673cae FG |
1416 | dfs.push_back(dir); |
1417 | while (!dfs.empty()) { | |
1418 | CDir *dir = dfs.front(); | |
1419 | dfs.pop_front(); | |
91327a77 | 1420 | for (auto& p : *dir) { |
94b18763 | 1421 | CDentry *dn = p.second; |
91327a77 | 1422 | if (!dn->get_linkage()->is_primary()) |
7c673cae FG |
1423 | continue; |
1424 | CInode *in = dn->get_linkage()->get_inode(); | |
1425 | if (in->is_dir()) { | |
1426 | // directory? | |
9f95a23c | 1427 | auto&& ls = in->get_dirfrags(); |
91327a77 AA |
1428 | for (auto& q : ls) { |
1429 | if (!q->state_test(CDir::STATE_EXPORTBOUND)) { | |
7c673cae | 1430 | // include nested dirfrag |
11fdf7f2 | 1431 | ceph_assert(q->get_dir_auth().first == CDIR_AUTH_PARENT); |
91327a77 | 1432 | dfs.push_back(q); // it's ours, recurse (later) |
7c673cae FG |
1433 | } |
1434 | } | |
1435 | } | |
91327a77 AA |
1436 | for (auto& q : in->get_client_caps()) { |
1437 | client_set.insert(q.first); | |
b32b8144 | 1438 | } |
7c673cae FG |
1439 | } |
1440 | } | |
1441 | } | |
1442 | ||
1443 | void Migrator::get_export_client_set(CInode *in, set<client_t>& client_set) | |
1444 | { | |
11fdf7f2 TL |
1445 | for (const auto &p : in->get_client_caps()) { |
1446 | client_set.insert(p.first); | |
1447 | } | |
7c673cae FG |
1448 | } |
1449 | ||
9f95a23c | 1450 | void Migrator::handle_export_prep_ack(const cref_t<MExportDirPrepAck> &m) |
7c673cae | 1451 | { |
f67539c2 | 1452 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1453 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 1454 | ceph_assert(dir); |
7c673cae | 1455 | |
9f95a23c | 1456 | dout(7) << *dir << dendl; |
7c673cae | 1457 | |
11fdf7f2 | 1458 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1459 | |
1460 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1461 | if (it == export_state.end() || | |
1462 | it->second.tid != m->get_tid() || | |
1463 | it->second.peer != mds_rank_t(m->get_source().num())) { | |
1464 | // export must have aborted. | |
1465 | dout(7) << "export must have aborted" << dendl; | |
7c673cae FG |
1466 | return; |
1467 | } | |
11fdf7f2 | 1468 | ceph_assert(it->second.state == EXPORT_PREPPING); |
7c673cae FG |
1469 | |
1470 | if (!m->is_success()) { | |
c07f9fc5 | 1471 | dout(7) << "peer couldn't acquire all needed locks or wasn't active, canceling" << dendl; |
7c673cae | 1472 | export_try_cancel(dir, false); |
7c673cae FG |
1473 | return; |
1474 | } | |
1475 | ||
20effc67 | 1476 | ceph_assert(g_conf()->mds_kill_export_at != 5); |
7c673cae FG |
1477 | // send warnings |
1478 | set<CDir*> bounds; | |
f67539c2 | 1479 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae | 1480 | |
11fdf7f2 | 1481 | ceph_assert(it->second.warning_ack_waiting.empty() || |
7c673cae FG |
1482 | (it->second.warning_ack_waiting.size() == 1 && |
1483 | it->second.warning_ack_waiting.count(MDS_RANK_NONE) > 0)); | |
11fdf7f2 | 1484 | ceph_assert(it->second.notify_ack_waiting.empty()); |
7c673cae | 1485 | |
181888fb FG |
1486 | for (const auto &p : dir->get_replicas()) { |
1487 | if (p.first == it->second.peer) continue; | |
7c673cae | 1488 | if (mds->is_cluster_degraded() && |
181888fb | 1489 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(p.first)) |
7c673cae | 1490 | continue; // only if active |
181888fb FG |
1491 | it->second.warning_ack_waiting.insert(p.first); |
1492 | it->second.notify_ack_waiting.insert(p.first); // we'll eventually get a notifyack, too! | |
7c673cae | 1493 | |
9f95a23c | 1494 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), it->second.tid, true, |
11fdf7f2 TL |
1495 | mds_authority_t(mds->get_nodeid(),CDIR_AUTH_UNKNOWN), |
1496 | mds_authority_t(mds->get_nodeid(),it->second.peer)); | |
1497 | for (auto &cdir : bounds) { | |
1498 | notify->get_bounds().push_back(cdir->dirfrag()); | |
1499 | } | |
181888fb | 1500 | mds->send_message_mds(notify, p.first); |
7c673cae FG |
1501 | |
1502 | } | |
1503 | ||
1504 | it->second.state = EXPORT_WARNING; | |
1505 | ||
11fdf7f2 | 1506 | ceph_assert(g_conf()->mds_kill_export_at != 6); |
7c673cae FG |
1507 | // nobody to warn? |
1508 | if (it->second.warning_ack_waiting.empty()) | |
1509 | export_go(dir); // start export. | |
7c673cae FG |
1510 | } |
1511 | ||
1512 | ||
1513 | class C_M_ExportGo : public MigratorContext { | |
1514 | CDir *dir; | |
1515 | uint64_t tid; | |
1516 | public: | |
1517 | C_M_ExportGo(Migrator *m, CDir *d, uint64_t t) : | |
1518 | MigratorContext(m), dir(d), tid(t) { | |
9f95a23c TL |
1519 | dir->get(CDir::PIN_PTRWAITER); |
1520 | } | |
7c673cae FG |
1521 | void finish(int r) override { |
1522 | mig->export_go_synced(dir, tid); | |
9f95a23c | 1523 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
1524 | } |
1525 | }; | |
1526 | ||
1527 | void Migrator::export_go(CDir *dir) | |
1528 | { | |
b32b8144 | 1529 | auto it = export_state.find(dir); |
11fdf7f2 | 1530 | ceph_assert(it != export_state.end()); |
9f95a23c | 1531 | dout(7) << *dir << " to " << it->second.peer << dendl; |
7c673cae FG |
1532 | |
1533 | // first sync log to flush out e.g. any cap imports | |
b32b8144 | 1534 | mds->mdlog->wait_for_safe(new C_M_ExportGo(this, dir, it->second.tid)); |
7c673cae FG |
1535 | mds->mdlog->flush(); |
1536 | } | |
1537 | ||
1538 | void Migrator::export_go_synced(CDir *dir, uint64_t tid) | |
1539 | { | |
1540 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
1541 | if (it == export_state.end() || | |
1542 | it->second.state == EXPORT_CANCELLING || | |
1543 | it->second.tid != tid) { | |
1544 | // export must have aborted. | |
1545 | dout(7) << "export must have aborted on " << dir << dendl; | |
1546 | return; | |
1547 | } | |
11fdf7f2 | 1548 | ceph_assert(it->second.state == EXPORT_WARNING); |
7c673cae FG |
1549 | mds_rank_t dest = it->second.peer; |
1550 | ||
9f95a23c | 1551 | dout(7) << *dir << " to " << dest << dendl; |
7c673cae | 1552 | |
f67539c2 | 1553 | mdcache->show_subtrees(); |
7c673cae FG |
1554 | |
1555 | it->second.state = EXPORT_EXPORTING; | |
11fdf7f2 | 1556 | ceph_assert(g_conf()->mds_kill_export_at != 7); |
7c673cae | 1557 | |
11fdf7f2 | 1558 | ceph_assert(dir->is_frozen_tree_root()); |
7c673cae FG |
1559 | |
1560 | // set ambiguous auth | |
f67539c2 | 1561 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), dest); |
7c673cae FG |
1562 | |
1563 | // take away the popularity we're sending. | |
11fdf7f2 | 1564 | mds->balancer->subtract_export(dir); |
7c673cae FG |
1565 | |
1566 | // fill export message with cache data | |
9f95a23c | 1567 | auto req = make_message<MExportDir>(dir->dirfrag(), it->second.tid); |
7c673cae | 1568 | map<client_t,entity_inst_t> exported_client_map; |
11fdf7f2 | 1569 | map<client_t,client_metadata_t> exported_client_metadata_map; |
9f95a23c TL |
1570 | uint64_t num_exported_inodes = 0; |
1571 | encode_export_dir(req->export_data, dir, // recur start point | |
1572 | exported_client_map, exported_client_metadata_map, | |
1573 | num_exported_inodes); | |
11fdf7f2 TL |
1574 | encode(exported_client_map, req->client_map, mds->mdsmap->get_up_features()); |
1575 | encode(exported_client_metadata_map, req->client_map); | |
7c673cae FG |
1576 | |
1577 | // add bounds to message | |
1578 | set<CDir*> bounds; | |
f67539c2 | 1579 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1580 | for (set<CDir*>::iterator p = bounds.begin(); |
1581 | p != bounds.end(); | |
1582 | ++p) | |
1583 | req->add_export((*p)->dirfrag()); | |
1584 | ||
1585 | // send | |
1586 | mds->send_message_mds(req, dest); | |
11fdf7f2 | 1587 | ceph_assert(g_conf()->mds_kill_export_at != 8); |
7c673cae | 1588 | |
11fdf7f2 | 1589 | mds->hit_export_target(dest, num_exported_inodes+1); |
7c673cae FG |
1590 | |
1591 | // stats | |
1592 | if (mds->logger) mds->logger->inc(l_mds_exported); | |
1593 | if (mds->logger) mds->logger->inc(l_mds_exported_inodes, num_exported_inodes); | |
1594 | ||
f67539c2 | 1595 | mdcache->show_subtrees(); |
7c673cae FG |
1596 | } |
1597 | ||
1598 | ||
1599 | /** encode_export_inode | |
1600 | * update our local state for this inode to export. | |
1601 | * encode relevant state to be sent over the wire. | |
1602 | * used by: encode_export_dir, file_rename (if foreign) | |
1603 | * | |
1604 | * FIXME: the separation between CInode.encode_export and these methods | |
1605 | * is pretty arbitrary and dumb. | |
1606 | */ | |
1607 | void Migrator::encode_export_inode(CInode *in, bufferlist& enc_state, | |
11fdf7f2 TL |
1608 | map<client_t,entity_inst_t>& exported_client_map, |
1609 | map<client_t,client_metadata_t>& exported_client_metadata_map) | |
7c673cae | 1610 | { |
9f95a23c TL |
1611 | ENCODE_START(1, 1, enc_state); |
1612 | dout(7) << *in << dendl; | |
11fdf7f2 | 1613 | ceph_assert(!in->is_replica(mds->get_nodeid())); |
7c673cae | 1614 | |
f67539c2 | 1615 | encode(in->ino(), enc_state); |
11fdf7f2 | 1616 | encode(in->last, enc_state); |
7c673cae FG |
1617 | in->encode_export(enc_state); |
1618 | ||
1619 | // caps | |
11fdf7f2 | 1620 | encode_export_inode_caps(in, true, enc_state, exported_client_map, exported_client_metadata_map); |
9f95a23c | 1621 | ENCODE_FINISH(enc_state); |
7c673cae FG |
1622 | } |
1623 | ||
1624 | void Migrator::encode_export_inode_caps(CInode *in, bool auth_cap, bufferlist& bl, | |
11fdf7f2 TL |
1625 | map<client_t,entity_inst_t>& exported_client_map, |
1626 | map<client_t,client_metadata_t>& exported_client_metadata_map) | |
7c673cae | 1627 | { |
9f95a23c TL |
1628 | ENCODE_START(1, 1, bl); |
1629 | dout(20) << *in << dendl; | |
7c673cae FG |
1630 | // encode caps |
1631 | map<client_t,Capability::Export> cap_map; | |
1632 | in->export_client_caps(cap_map); | |
11fdf7f2 | 1633 | encode(cap_map, bl); |
7c673cae | 1634 | if (auth_cap) { |
11fdf7f2 | 1635 | encode(in->get_mds_caps_wanted(), bl); |
7c673cae FG |
1636 | |
1637 | in->state_set(CInode::STATE_EXPORTINGCAPS); | |
1638 | in->get(CInode::PIN_EXPORTINGCAPS); | |
1639 | } | |
1640 | ||
1641 | // make note of clients named by exported capabilities | |
11fdf7f2 TL |
1642 | for (const auto &p : in->get_client_caps()) { |
1643 | if (exported_client_map.count(p.first)) | |
1644 | continue; | |
1645 | Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p.first.v)); | |
1646 | exported_client_map[p.first] = session->info.inst; | |
1647 | exported_client_metadata_map[p.first] = session->info.client_metadata; | |
1648 | } | |
9f95a23c | 1649 | ENCODE_FINISH(bl); |
7c673cae FG |
1650 | } |
1651 | ||
1652 | void Migrator::finish_export_inode_caps(CInode *in, mds_rank_t peer, | |
1653 | map<client_t,Capability::Import>& peer_imported) | |
1654 | { | |
9f95a23c | 1655 | dout(20) << *in << dendl; |
7c673cae FG |
1656 | |
1657 | in->state_clear(CInode::STATE_EXPORTINGCAPS); | |
1658 | in->put(CInode::PIN_EXPORTINGCAPS); | |
1659 | ||
1660 | // tell (all) clients about migrating caps.. | |
11fdf7f2 TL |
1661 | for (const auto &p : in->get_client_caps()) { |
1662 | const Capability *cap = &p.second; | |
9f95a23c | 1663 | dout(7) << p.first |
7c673cae | 1664 | << " exported caps on " << *in << dendl; |
9f95a23c TL |
1665 | auto m = make_message<MClientCaps>(CEPH_CAP_OP_EXPORT, in->ino(), 0, |
1666 | cap->get_cap_id(), cap->get_mseq(), | |
1667 | mds->get_osd_epoch_barrier()); | |
11fdf7f2 TL |
1668 | map<client_t,Capability::Import>::iterator q = peer_imported.find(p.first); |
1669 | ceph_assert(q != peer_imported.end()); | |
28e407b8 AA |
1670 | m->set_cap_peer(q->second.cap_id, q->second.issue_seq, q->second.mseq, |
1671 | (q->second.cap_id > 0 ? peer : -1), 0); | |
11fdf7f2 | 1672 | mds->send_message_client_counted(m, p.first); |
7c673cae FG |
1673 | } |
1674 | in->clear_client_caps_after_export(); | |
1675 | mds->locker->eval(in, CEPH_CAP_LOCKS); | |
1676 | } | |
1677 | ||
11fdf7f2 | 1678 | void Migrator::finish_export_inode(CInode *in, mds_rank_t peer, |
7c673cae | 1679 | map<client_t,Capability::Import>& peer_imported, |
11fdf7f2 | 1680 | MDSContext::vec& finished) |
7c673cae | 1681 | { |
9f95a23c | 1682 | dout(12) << *in << dendl; |
7c673cae FG |
1683 | |
1684 | // clean | |
1685 | if (in->is_dirty()) | |
1686 | in->mark_clean(); | |
1687 | ||
1688 | // clear/unpin cached_by (we're no longer the authority) | |
1689 | in->clear_replica_map(); | |
1690 | ||
1691 | // twiddle lock states for auth -> replica transition | |
1692 | in->authlock.export_twiddle(); | |
1693 | in->linklock.export_twiddle(); | |
1694 | in->dirfragtreelock.export_twiddle(); | |
1695 | in->filelock.export_twiddle(); | |
1696 | in->nestlock.export_twiddle(); | |
1697 | in->xattrlock.export_twiddle(); | |
1698 | in->snaplock.export_twiddle(); | |
1699 | in->flocklock.export_twiddle(); | |
1700 | in->policylock.export_twiddle(); | |
1701 | ||
1702 | // mark auth | |
11fdf7f2 | 1703 | ceph_assert(in->is_auth()); |
7c673cae FG |
1704 | in->state_clear(CInode::STATE_AUTH); |
1705 | in->replica_nonce = CInode::EXPORT_NONCE; | |
1706 | ||
1707 | in->clear_dirty_rstat(); | |
1708 | ||
1709 | // no more auth subtree? clear scatter dirty | |
1710 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) | |
1711 | in->clear_scatter_dirty(); | |
1712 | ||
7c673cae FG |
1713 | in->clear_dirty_parent(); |
1714 | ||
f91f0fd5 TL |
1715 | in->clear_clientwriteable(); |
1716 | ||
7c673cae FG |
1717 | in->clear_file_locks(); |
1718 | ||
1719 | // waiters | |
1720 | in->take_waiting(CInode::WAIT_ANY_MASK, finished); | |
1721 | ||
11fdf7f2 | 1722 | in->finish_export(); |
7c673cae FG |
1723 | |
1724 | finish_export_inode_caps(in, peer, peer_imported); | |
7c673cae FG |
1725 | } |
1726 | ||
9f95a23c | 1727 | void Migrator::encode_export_dir(bufferlist& exportbl, |
7c673cae FG |
1728 | CDir *dir, |
1729 | map<client_t,entity_inst_t>& exported_client_map, | |
9f95a23c TL |
1730 | map<client_t,client_metadata_t>& exported_client_metadata_map, |
1731 | uint64_t &num_exported) | |
7c673cae | 1732 | { |
9f95a23c TL |
1733 | // This has to be declared before ENCODE_STARTED as it will need to be referenced after ENCODE_FINISH. |
1734 | std::vector<CDir*> subdirs; | |
1735 | ||
1736 | ENCODE_START(1, 1, exportbl); | |
1737 | dout(7) << *dir << " " << dir->get_num_head_items() << " head items" << dendl; | |
7c673cae | 1738 | |
11fdf7f2 | 1739 | ceph_assert(dir->get_projected_version() == dir->get_version()); |
7c673cae FG |
1740 | |
1741 | #ifdef MDS_VERIFY_FRAGSTAT | |
1742 | if (dir->is_complete()) | |
1743 | dir->verify_fragstat(); | |
1744 | #endif | |
1745 | ||
1746 | // dir | |
1747 | dirfrag_t df = dir->dirfrag(); | |
11fdf7f2 | 1748 | encode(df, exportbl); |
7c673cae FG |
1749 | dir->encode_export(exportbl); |
1750 | ||
1751 | __u32 nden = dir->items.size(); | |
11fdf7f2 | 1752 | encode(nden, exportbl); |
7c673cae FG |
1753 | |
1754 | // dentries | |
94b18763 FG |
1755 | for (auto &p : *dir) { |
1756 | CDentry *dn = p.second; | |
7c673cae | 1757 | CInode *in = dn->get_linkage()->get_inode(); |
7c673cae FG |
1758 | |
1759 | num_exported++; | |
1760 | ||
1761 | // -- dentry | |
9f95a23c | 1762 | dout(7) << " exporting " << *dn << dendl; |
7c673cae FG |
1763 | |
1764 | // dn name | |
11fdf7f2 TL |
1765 | encode(dn->get_name(), exportbl); |
1766 | encode(dn->last, exportbl); | |
7c673cae FG |
1767 | |
1768 | // state | |
1769 | dn->encode_export(exportbl); | |
1770 | ||
1771 | // points to... | |
1772 | ||
1773 | // null dentry? | |
1774 | if (dn->get_linkage()->is_null()) { | |
1775 | exportbl.append("N", 1); // null dentry | |
1776 | continue; | |
1777 | } | |
1778 | ||
1779 | if (dn->get_linkage()->is_remote()) { | |
7c673cae FG |
1780 | inodeno_t ino = dn->get_linkage()->get_remote_ino(); |
1781 | unsigned char d_type = dn->get_linkage()->get_remote_d_type(); | |
f67539c2 TL |
1782 | auto& alternate_name = dn->alternate_name; |
1783 | // remote link | |
1784 | CDentry::encode_remote(ino, d_type, alternate_name, exportbl); | |
7c673cae FG |
1785 | continue; |
1786 | } | |
1787 | ||
1788 | // primary link | |
1789 | // -- inode | |
f67539c2 TL |
1790 | exportbl.append("i", 1); // inode dentry |
1791 | ||
1792 | ENCODE_START(2, 1, exportbl); | |
11fdf7f2 | 1793 | encode_export_inode(in, exportbl, exported_client_map, exported_client_metadata_map); // encode, and (update state for) export |
f67539c2 TL |
1794 | encode(dn->alternate_name, exportbl); |
1795 | ENCODE_FINISH(exportbl); | |
9f95a23c | 1796 | |
7c673cae | 1797 | // directory? |
9f95a23c TL |
1798 | auto&& dfs = in->get_dirfrags(); |
1799 | for (const auto& t : dfs) { | |
7c673cae FG |
1800 | if (!t->state_test(CDir::STATE_EXPORTBOUND)) { |
1801 | // include nested dirfrag | |
11fdf7f2 | 1802 | ceph_assert(t->get_dir_auth().first == CDIR_AUTH_PARENT); |
9f95a23c | 1803 | subdirs.push_back(t); // it's ours, recurse (later) |
7c673cae FG |
1804 | } |
1805 | } | |
1806 | } | |
1807 | ||
9f95a23c | 1808 | ENCODE_FINISH(exportbl); |
7c673cae | 1809 | // subdirs |
9f95a23c TL |
1810 | for (const auto &dir : subdirs) { |
1811 | encode_export_dir(exportbl, dir, exported_client_map, exported_client_metadata_map, num_exported); | |
1812 | } | |
7c673cae FG |
1813 | } |
1814 | ||
11fdf7f2 | 1815 | void Migrator::finish_export_dir(CDir *dir, mds_rank_t peer, |
7c673cae | 1816 | map<inodeno_t,map<client_t,Capability::Import> >& peer_imported, |
11fdf7f2 | 1817 | MDSContext::vec& finished, int *num_dentries) |
7c673cae | 1818 | { |
9f95a23c | 1819 | dout(10) << *dir << dendl; |
7c673cae FG |
1820 | |
1821 | // release open_by | |
1822 | dir->clear_replica_map(); | |
1823 | ||
1824 | // mark | |
11fdf7f2 | 1825 | ceph_assert(dir->is_auth()); |
7c673cae FG |
1826 | dir->state_clear(CDir::STATE_AUTH); |
1827 | dir->remove_bloom(); | |
1828 | dir->replica_nonce = CDir::EXPORT_NONCE; | |
1829 | ||
1830 | if (dir->is_dirty()) | |
1831 | dir->mark_clean(); | |
1832 | ||
1833 | // suck up all waiters | |
1834 | dir->take_waiting(CDir::WAIT_ANY_MASK, finished); // all dir waiters | |
1835 | ||
1836 | // pop | |
11fdf7f2 | 1837 | dir->finish_export(); |
7c673cae FG |
1838 | |
1839 | // dentries | |
9f95a23c | 1840 | std::vector<CDir*> subdirs; |
94b18763 FG |
1841 | for (auto &p : *dir) { |
1842 | CDentry *dn = p.second; | |
7c673cae FG |
1843 | CInode *in = dn->get_linkage()->get_inode(); |
1844 | ||
1845 | // dentry | |
1846 | dn->finish_export(); | |
1847 | ||
1848 | // inode? | |
1849 | if (dn->get_linkage()->is_primary()) { | |
11fdf7f2 | 1850 | finish_export_inode(in, peer, peer_imported[in->ino()], finished); |
7c673cae FG |
1851 | |
1852 | // subdirs? | |
9f95a23c TL |
1853 | auto&& dirs = in->get_nested_dirfrags(); |
1854 | subdirs.insert(std::end(subdirs), std::begin(dirs), std::end(dirs)); | |
7c673cae FG |
1855 | } |
1856 | ||
f67539c2 | 1857 | mdcache->touch_dentry_bottom(dn); // move dentry to tail of LRU |
7c673cae FG |
1858 | ++(*num_dentries); |
1859 | } | |
1860 | ||
1861 | // subdirs | |
9f95a23c TL |
1862 | for (const auto& dir : subdirs) { |
1863 | finish_export_dir(dir, peer, peer_imported, finished, num_dentries); | |
1864 | } | |
7c673cae FG |
1865 | } |
1866 | ||
1867 | class C_MDS_ExportFinishLogged : public MigratorLogContext { | |
1868 | CDir *dir; | |
1869 | public: | |
1870 | C_MDS_ExportFinishLogged(Migrator *m, CDir *d) : MigratorLogContext(m), dir(d) {} | |
1871 | void finish(int r) override { | |
1872 | mig->export_logged_finish(dir); | |
1873 | } | |
1874 | }; | |
1875 | ||
1876 | ||
1877 | /* | |
1878 | * i should get an export_ack from the export target. | |
7c673cae | 1879 | */ |
9f95a23c | 1880 | void Migrator::handle_export_ack(const cref_t<MExportDirAck> &m) |
7c673cae | 1881 | { |
f67539c2 | 1882 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 1883 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 TL |
1884 | ceph_assert(dir); |
1885 | ceph_assert(dir->is_frozen_tree_root()); // i'm exporting! | |
7c673cae FG |
1886 | |
1887 | // yay! | |
9f95a23c | 1888 | dout(7) << *dir << dendl; |
7c673cae | 1889 | |
11fdf7f2 | 1890 | mds->hit_export_target(dest, -1); |
7c673cae FG |
1891 | |
1892 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); | |
11fdf7f2 TL |
1893 | ceph_assert(it != export_state.end()); |
1894 | ceph_assert(it->second.state == EXPORT_EXPORTING); | |
1895 | ceph_assert(it->second.tid == m->get_tid()); | |
7c673cae | 1896 | |
11fdf7f2 TL |
1897 | auto bp = m->imported_caps.cbegin(); |
1898 | decode(it->second.peer_imported, bp); | |
7c673cae FG |
1899 | |
1900 | it->second.state = EXPORT_LOGGINGFINISH; | |
20effc67 | 1901 | ceph_assert(g_conf()->mds_kill_export_at != 9); |
7c673cae | 1902 | set<CDir*> bounds; |
f67539c2 | 1903 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae | 1904 | |
7c673cae FG |
1905 | // log completion. |
1906 | // include export bounds, to ensure they're in the journal. | |
31f18b77 | 1907 | EExport *le = new EExport(mds->mdlog, dir, it->second.peer);; |
7c673cae FG |
1908 | mds->mdlog->start_entry(le); |
1909 | ||
1910 | le->metablob.add_dir_context(dir, EMetaBlob::TO_ROOT); | |
31f18b77 | 1911 | le->metablob.add_dir(dir, false); |
7c673cae FG |
1912 | for (set<CDir*>::iterator p = bounds.begin(); |
1913 | p != bounds.end(); | |
1914 | ++p) { | |
1915 | CDir *bound = *p; | |
1916 | le->get_bounds().insert(bound->dirfrag()); | |
1917 | le->metablob.add_dir_context(bound); | |
1918 | le->metablob.add_dir(bound, false); | |
1919 | } | |
1920 | ||
31f18b77 FG |
1921 | // list us second, them first. |
1922 | // this keeps authority().first in sync with subtree auth state in the journal. | |
f67539c2 | 1923 | mdcache->adjust_subtree_auth(dir, it->second.peer, mds->get_nodeid()); |
31f18b77 | 1924 | |
7c673cae FG |
1925 | // log export completion, then finish (unfreeze, trigger finish context, etc.) |
1926 | mds->mdlog->submit_entry(le, new C_MDS_ExportFinishLogged(this, dir)); | |
1927 | mds->mdlog->flush(); | |
20effc67 | 1928 | ceph_assert(g_conf()->mds_kill_export_at != 10); |
7c673cae FG |
1929 | } |
1930 | ||
b32b8144 | 1931 | void Migrator::export_notify_abort(CDir *dir, export_state_t& stat, set<CDir*>& bounds) |
7c673cae | 1932 | { |
9f95a23c | 1933 | dout(7) << *dir << dendl; |
7c673cae | 1934 | |
11fdf7f2 | 1935 | ceph_assert(stat.state == EXPORT_CANCELLING); |
7c673cae FG |
1936 | |
1937 | if (stat.notify_ack_waiting.empty()) { | |
1938 | stat.state = EXPORT_CANCELLED; | |
1939 | return; | |
1940 | } | |
1941 | ||
1942 | dir->auth_pin(this); | |
1943 | ||
1944 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
1945 | p != stat.notify_ack_waiting.end(); | |
1946 | ++p) { | |
9f95a23c | 1947 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
1948 | pair<int,int>(mds->get_nodeid(), stat.peer), |
1949 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
1950 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
1951 | notify->get_bounds().push_back((*i)->dirfrag()); | |
1952 | mds->send_message_mds(notify, *p); | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | /* | |
20effc67 | 1957 | * this happens if the dest failes after i send the export data but before it is acked |
7c673cae FG |
1958 | * that is, we don't know they safely received and logged it, so we reverse our changes |
1959 | * and go on. | |
1960 | */ | |
b32b8144 | 1961 | void Migrator::export_reverse(CDir *dir, export_state_t& stat) |
7c673cae | 1962 | { |
9f95a23c | 1963 | dout(7) << *dir << dendl; |
7c673cae FG |
1964 | |
1965 | set<CInode*> to_eval; | |
1966 | ||
1967 | set<CDir*> bounds; | |
f67539c2 | 1968 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
1969 | |
1970 | // remove exporting pins | |
9f95a23c | 1971 | std::deque<CDir*> rq; |
7c673cae FG |
1972 | rq.push_back(dir); |
1973 | while (!rq.empty()) { | |
1974 | CDir *t = rq.front(); | |
1975 | rq.pop_front(); | |
1976 | t->abort_export(); | |
94b18763 FG |
1977 | for (auto &p : *t) { |
1978 | CDentry *dn = p.second; | |
1979 | dn->abort_export(); | |
1980 | if (!dn->get_linkage()->is_primary()) | |
7c673cae | 1981 | continue; |
94b18763 | 1982 | CInode *in = dn->get_linkage()->get_inode(); |
7c673cae FG |
1983 | in->abort_export(); |
1984 | if (in->state_test(CInode::STATE_EVALSTALECAPS)) { | |
1985 | in->state_clear(CInode::STATE_EVALSTALECAPS); | |
1986 | to_eval.insert(in); | |
1987 | } | |
9f95a23c TL |
1988 | if (in->is_dir()) { |
1989 | auto&& dirs = in->get_nested_dirfrags(); | |
1990 | for (const auto& dir : dirs) { | |
1991 | rq.push_back(dir); | |
1992 | } | |
1993 | } | |
7c673cae FG |
1994 | } |
1995 | } | |
1996 | ||
1997 | // unpin bounds | |
b32b8144 | 1998 | for (auto bd : bounds) { |
7c673cae FG |
1999 | bd->put(CDir::PIN_EXPORTBOUND); |
2000 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
2001 | } | |
2002 | ||
7c673cae | 2003 | // notify bystanders |
b32b8144 | 2004 | export_notify_abort(dir, stat, bounds); |
7c673cae | 2005 | |
224ce89b | 2006 | // unfreeze tree, with possible subtree merge. |
f67539c2 | 2007 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); |
224ce89b | 2008 | |
7c673cae | 2009 | // process delayed expires |
f67539c2 | 2010 | mdcache->process_delayed_expire(dir); |
224ce89b | 2011 | |
7c673cae | 2012 | dir->unfreeze_tree(); |
f67539c2 | 2013 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2014 | |
2015 | // revoke/resume stale caps | |
2016 | for (auto in : to_eval) { | |
2017 | bool need_issue = false; | |
11fdf7f2 TL |
2018 | for (auto &p : in->client_caps) { |
2019 | Capability *cap = &p.second; | |
a8e16298 | 2020 | if (!cap->is_stale()) { |
7c673cae | 2021 | need_issue = true; |
a8e16298 | 2022 | break; |
7c673cae FG |
2023 | } |
2024 | } | |
2025 | if (need_issue && | |
2026 | (!in->is_auth() || !mds->locker->eval(in, CEPH_CAP_LOCKS))) | |
2027 | mds->locker->issue_caps(in); | |
2028 | } | |
2029 | ||
f67539c2 | 2030 | mdcache->show_cache(); |
7c673cae FG |
2031 | } |
2032 | ||
2033 | ||
2034 | /* | |
2035 | * once i get the ack, and logged the EExportFinish(true), | |
2036 | * send notifies (if any), otherwise go straight to finish. | |
2037 | * | |
2038 | */ | |
2039 | void Migrator::export_logged_finish(CDir *dir) | |
2040 | { | |
9f95a23c | 2041 | dout(7) << *dir << dendl; |
7c673cae FG |
2042 | |
2043 | export_state_t& stat = export_state[dir]; | |
2044 | ||
2045 | // send notifies | |
2046 | set<CDir*> bounds; | |
f67539c2 | 2047 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2048 | |
2049 | for (set<mds_rank_t>::iterator p = stat.notify_ack_waiting.begin(); | |
2050 | p != stat.notify_ack_waiting.end(); | |
2051 | ++p) { | |
9f95a23c | 2052 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
2053 | pair<int,int>(mds->get_nodeid(), stat.peer), |
2054 | pair<int,int>(stat.peer, CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2055 | |
2056 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) | |
2057 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2058 | ||
2059 | mds->send_message_mds(notify, *p); | |
2060 | } | |
2061 | ||
2062 | // wait for notifyacks | |
2063 | stat.state = EXPORT_NOTIFYING; | |
20effc67 | 2064 | ceph_assert(g_conf()->mds_kill_export_at != 11); |
7c673cae FG |
2065 | |
2066 | // no notifies to wait for? | |
2067 | if (stat.notify_ack_waiting.empty()) { | |
2068 | export_finish(dir); // skip notify/notify_ack stage. | |
2069 | } else { | |
2070 | // notify peer to send cap import messages to clients | |
2071 | if (!mds->is_cluster_degraded() || | |
2072 | mds->mdsmap->is_clientreplay_or_active_or_stopping(stat.peer)) { | |
9f95a23c | 2073 | mds->send_message_mds(make_message<MExportDirFinish>(dir->dirfrag(), false, stat.tid), stat.peer); |
7c673cae FG |
2074 | } else { |
2075 | dout(7) << "not sending MExportDirFinish, dest has failed" << dendl; | |
2076 | } | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | * warning: | |
2082 | * i'll get an ack from each bystander. | |
2083 | * when i get them all, do the export. | |
2084 | * notify: | |
2085 | * i'll get an ack from each bystander. | |
2086 | * when i get them all, unfreeze and send the finish. | |
7c673cae | 2087 | */ |
9f95a23c | 2088 | void Migrator::handle_export_notify_ack(const cref_t<MExportDirNotifyAck> &m) |
7c673cae | 2089 | { |
f67539c2 | 2090 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae | 2091 | mds_rank_t dest(m->get_source().num()); |
11fdf7f2 | 2092 | ceph_assert(dir); |
7c673cae FG |
2093 | mds_rank_t from = mds_rank_t(m->get_source().num()); |
2094 | ||
11fdf7f2 | 2095 | mds->hit_export_target(dest, -1); |
7c673cae FG |
2096 | |
2097 | auto export_state_entry = export_state.find(dir); | |
2098 | if (export_state_entry != export_state.end()) { | |
2099 | export_state_t& stat = export_state_entry->second; | |
2100 | if (stat.state == EXPORT_WARNING && | |
2101 | stat.warning_ack_waiting.erase(from)) { | |
2102 | // exporting. process warning. | |
9f95a23c | 2103 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2104 | << ": exporting, processing warning on " << *dir << dendl; |
2105 | if (stat.warning_ack_waiting.empty()) | |
2106 | export_go(dir); // start export. | |
2107 | } else if (stat.state == EXPORT_NOTIFYING && | |
2108 | stat.notify_ack_waiting.erase(from)) { | |
2109 | // exporting. process notify. | |
9f95a23c | 2110 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2111 | << ": exporting, processing notify on " << *dir << dendl; |
2112 | if (stat.notify_ack_waiting.empty()) | |
2113 | export_finish(dir); | |
2114 | } else if (stat.state == EXPORT_CANCELLING && | |
2115 | m->get_new_auth().second == CDIR_AUTH_UNKNOWN && // not warning ack | |
2116 | stat.notify_ack_waiting.erase(from)) { | |
9f95a23c | 2117 | dout(7) << "from " << m->get_source() |
7c673cae FG |
2118 | << ": cancelling export, processing notify on " << *dir << dendl; |
2119 | if (stat.notify_ack_waiting.empty()) { | |
91327a77 | 2120 | export_cancel_finish(export_state_entry); |
7c673cae FG |
2121 | } |
2122 | } | |
2123 | } | |
2124 | else { | |
2125 | auto import_state_entry = import_state.find(dir->dirfrag()); | |
2126 | if (import_state_entry != import_state.end()) { | |
2127 | import_state_t& stat = import_state_entry->second; | |
2128 | if (stat.state == IMPORT_ABORTING) { | |
2129 | // reversing import | |
9f95a23c | 2130 | dout(7) << "from " << m->get_source() |
7c673cae | 2131 | << ": aborting import on " << *dir << dendl; |
11fdf7f2 | 2132 | ceph_assert(stat.bystanders.count(from)); |
7c673cae FG |
2133 | stat.bystanders.erase(from); |
2134 | if (stat.bystanders.empty()) | |
2135 | import_reverse_unfreeze(dir); | |
2136 | } | |
2137 | } | |
2138 | } | |
7c673cae FG |
2139 | } |
2140 | ||
2141 | void Migrator::export_finish(CDir *dir) | |
2142 | { | |
9f95a23c | 2143 | dout(3) << *dir << dendl; |
7c673cae | 2144 | |
20effc67 | 2145 | ceph_assert(g_conf()->mds_kill_export_at != 12); |
7c673cae FG |
2146 | map<CDir*,export_state_t>::iterator it = export_state.find(dir); |
2147 | if (it == export_state.end()) { | |
2148 | dout(7) << "target must have failed, not sending final commit message. export succeeded anyway." << dendl; | |
2149 | return; | |
2150 | } | |
2151 | ||
2152 | // send finish/commit to new auth | |
2153 | if (!mds->is_cluster_degraded() || | |
2154 | mds->mdsmap->is_clientreplay_or_active_or_stopping(it->second.peer)) { | |
9f95a23c | 2155 | mds->send_message_mds(make_message<MExportDirFinish>(dir->dirfrag(), true, it->second.tid), it->second.peer); |
7c673cae FG |
2156 | } else { |
2157 | dout(7) << "not sending MExportDirFinish last, dest has failed" << dendl; | |
2158 | } | |
11fdf7f2 | 2159 | ceph_assert(g_conf()->mds_kill_export_at != 13); |
7c673cae FG |
2160 | |
2161 | // finish export (adjust local cache state) | |
2162 | int num_dentries = 0; | |
11fdf7f2 TL |
2163 | MDSContext::vec finished; |
2164 | finish_export_dir(dir, it->second.peer, | |
224ce89b WB |
2165 | it->second.peer_imported, finished, &num_dentries); |
2166 | ||
11fdf7f2 | 2167 | ceph_assert(!dir->is_auth()); |
f67539c2 | 2168 | mdcache->adjust_subtree_auth(dir, it->second.peer); |
224ce89b | 2169 | |
7c673cae FG |
2170 | // unpin bounds |
2171 | set<CDir*> bounds; | |
f67539c2 | 2172 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2173 | for (set<CDir*>::iterator p = bounds.begin(); |
2174 | p != bounds.end(); | |
2175 | ++p) { | |
2176 | CDir *bd = *p; | |
2177 | bd->put(CDir::PIN_EXPORTBOUND); | |
2178 | bd->state_clear(CDir::STATE_EXPORTBOUND); | |
2179 | } | |
2180 | ||
2181 | if (dir->state_test(CDir::STATE_AUXSUBTREE)) | |
2182 | dir->state_clear(CDir::STATE_AUXSUBTREE); | |
2183 | ||
224ce89b | 2184 | // discard delayed expires |
f67539c2 | 2185 | mdcache->discard_delayed_expire(dir); |
224ce89b | 2186 | |
9f95a23c | 2187 | dout(7) << "unfreezing" << dendl; |
224ce89b WB |
2188 | |
2189 | // unfreeze tree, with possible subtree merge. | |
7c673cae | 2190 | // (we do this _after_ removing EXPORTBOUND pins, to allow merges) |
224ce89b | 2191 | dir->unfreeze_tree(); |
f67539c2 | 2192 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2193 | |
2194 | // no more auth subtree? clear scatter dirty | |
2195 | if (!dir->get_inode()->is_auth() && | |
2196 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2197 | dir->get_inode()->clear_scatter_dirty(); | |
2198 | // wake up scatter_nudge waiters | |
224ce89b | 2199 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, finished); |
7c673cae FG |
2200 | } |
2201 | ||
224ce89b WB |
2202 | if (!finished.empty()) |
2203 | mds->queue_waiters(finished); | |
7c673cae | 2204 | |
91327a77 AA |
2205 | MutationRef mut = std::move(it->second.mut); |
2206 | auto parent = std::move(it->second.parent); | |
7c673cae | 2207 | // remove from exporting list, clean up state |
91327a77 | 2208 | total_exporting_size -= it->second.approx_size; |
7c673cae | 2209 | export_state.erase(it); |
91327a77 | 2210 | |
11fdf7f2 | 2211 | ceph_assert(dir->state_test(CDir::STATE_EXPORTING)); |
1adf2230 | 2212 | dir->clear_exporting(); |
7c673cae | 2213 | |
f67539c2 | 2214 | mdcache->show_subtrees(); |
7c673cae FG |
2215 | audit(); |
2216 | ||
f67539c2 | 2217 | mdcache->trim(num_dentries); // try trimming exported dentries |
7c673cae FG |
2218 | |
2219 | // send pending import_maps? | |
f67539c2 | 2220 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
2221 | |
2222 | // drop locks, unpin path | |
2223 | if (mut) { | |
2224 | mds->locker->drop_locks(mut.get()); | |
2225 | mut->cleanup(); | |
2226 | } | |
91327a77 AA |
2227 | |
2228 | if (parent) | |
2229 | child_export_finish(parent, true); | |
2230 | ||
7c673cae FG |
2231 | maybe_do_queued_export(); |
2232 | } | |
2233 | ||
2234 | ||
2235 | ||
11fdf7f2 TL |
2236 | class C_MDS_ExportDiscover : public MigratorContext { |
2237 | public: | |
9f95a23c | 2238 | C_MDS_ExportDiscover(Migrator *mig, const cref_t<MExportDirDiscover>& m) : MigratorContext(mig), m(m) {} |
11fdf7f2 TL |
2239 | void finish(int r) override { |
2240 | mig->handle_export_discover(m, true); | |
2241 | } | |
2242 | private: | |
9f95a23c | 2243 | cref_t<MExportDirDiscover> m; |
11fdf7f2 | 2244 | }; |
7c673cae | 2245 | |
11fdf7f2 TL |
2246 | class C_MDS_ExportDiscoverFactory : public MDSContextFactory { |
2247 | public: | |
9f95a23c | 2248 | C_MDS_ExportDiscoverFactory(Migrator *mig, cref_t<MExportDirDiscover> m) : mig(mig), m(m) {} |
11fdf7f2 TL |
2249 | MDSContext *build() { |
2250 | return new C_MDS_ExportDiscover(mig, m); | |
2251 | } | |
2252 | private: | |
2253 | Migrator *mig; | |
9f95a23c | 2254 | cref_t<MExportDirDiscover> m; |
11fdf7f2 | 2255 | }; |
7c673cae FG |
2256 | |
2257 | // ========================================================== | |
2258 | // IMPORT | |
2259 | ||
9f95a23c | 2260 | void Migrator::handle_export_discover(const cref_t<MExportDirDiscover> &m, bool started) |
7c673cae FG |
2261 | { |
2262 | mds_rank_t from = m->get_source_mds(); | |
11fdf7f2 | 2263 | ceph_assert(from != mds->get_nodeid()); |
7c673cae | 2264 | |
9f95a23c | 2265 | dout(7) << m->get_path() << dendl; |
7c673cae FG |
2266 | |
2267 | // note import state | |
2268 | dirfrag_t df = m->get_dirfrag(); | |
c07f9fc5 FG |
2269 | |
2270 | if (!mds->is_active()) { | |
2271 | dout(7) << " not active, send NACK " << dendl; | |
9f95a23c | 2272 | mds->send_message_mds(make_message<MExportDirDiscoverAck>(df, m->get_tid(), false), from); |
c07f9fc5 FG |
2273 | return; |
2274 | } | |
2275 | ||
7c673cae | 2276 | // only start discovering on this message once. |
b32b8144 | 2277 | import_state_t *p_state; |
7c673cae | 2278 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); |
11fdf7f2 TL |
2279 | if (!started) { |
2280 | ceph_assert(it == import_state.end()); | |
b32b8144 FG |
2281 | p_state = &import_state[df]; |
2282 | p_state->state = IMPORT_DISCOVERING; | |
2283 | p_state->peer = from; | |
2284 | p_state->tid = m->get_tid(); | |
7c673cae FG |
2285 | } else { |
2286 | // am i retrying after ancient path_traverse results? | |
2287 | if (it == import_state.end() || | |
2288 | it->second.peer != from || | |
2289 | it->second.tid != m->get_tid()) { | |
2290 | dout(7) << " dropping obsolete message" << dendl; | |
7c673cae FG |
2291 | return; |
2292 | } | |
11fdf7f2 | 2293 | ceph_assert(it->second.state == IMPORT_DISCOVERING); |
b32b8144 | 2294 | p_state = &it->second; |
7c673cae FG |
2295 | } |
2296 | ||
11fdf7f2 | 2297 | C_MDS_ExportDiscoverFactory cf(this, m); |
f67539c2 | 2298 | if (!mdcache->is_open()) { |
9f95a23c | 2299 | dout(10) << " waiting for root" << dendl; |
11fdf7f2 | 2300 | mds->mdcache->wait_for_open(cf.build()); |
7c673cae FG |
2301 | return; |
2302 | } | |
2303 | ||
20effc67 | 2304 | ceph_assert(g_conf()->mds_kill_import_at != 1); |
7c673cae FG |
2305 | |
2306 | // do we have it? | |
f67539c2 | 2307 | CInode *in = mdcache->get_inode(m->get_dirfrag().ino); |
7c673cae FG |
2308 | if (!in) { |
2309 | // must discover it! | |
2310 | filepath fpath(m->get_path()); | |
2311 | vector<CDentry*> trace; | |
2312 | MDRequestRef null_ref; | |
f67539c2 TL |
2313 | int r = mdcache->path_traverse(null_ref, cf, fpath, |
2314 | MDS_TRAVERSE_DISCOVER | MDS_TRAVERSE_PATH_LOCKED, | |
2315 | &trace); | |
7c673cae FG |
2316 | if (r > 0) return; |
2317 | if (r < 0) { | |
9f95a23c | 2318 | dout(7) << "failed to discover or not dir " << m->get_path() << ", NAK" << dendl; |
7c673cae FG |
2319 | ceph_abort(); // this shouldn't happen if the auth pins its path properly!!!! |
2320 | } | |
2321 | ||
2322 | ceph_abort(); // this shouldn't happen; the get_inode above would have succeeded. | |
2323 | } | |
2324 | ||
2325 | // yay | |
9f95a23c | 2326 | dout(7) << "have " << df << " inode " << *in << dendl; |
7c673cae | 2327 | |
b32b8144 | 2328 | p_state->state = IMPORT_DISCOVERED; |
7c673cae FG |
2329 | |
2330 | // pin inode in the cache (for now) | |
11fdf7f2 | 2331 | ceph_assert(in->is_dir()); |
7c673cae FG |
2332 | in->get(CInode::PIN_IMPORTING); |
2333 | ||
2334 | // reply | |
2335 | dout(7) << " sending export_discover_ack on " << *in << dendl; | |
9f95a23c | 2336 | mds->send_message_mds(make_message<MExportDirDiscoverAck>(df, m->get_tid()), p_state->peer); |
20effc67 | 2337 | ceph_assert(g_conf()->mds_kill_import_at != 2); |
7c673cae FG |
2338 | } |
2339 | ||
2340 | void Migrator::import_reverse_discovering(dirfrag_t df) | |
2341 | { | |
2342 | import_state.erase(df); | |
2343 | } | |
2344 | ||
2345 | void Migrator::import_reverse_discovered(dirfrag_t df, CInode *diri) | |
2346 | { | |
2347 | // unpin base | |
2348 | diri->put(CInode::PIN_IMPORTING); | |
2349 | import_state.erase(df); | |
2350 | } | |
2351 | ||
b32b8144 | 2352 | void Migrator::import_reverse_prepping(CDir *dir, import_state_t& stat) |
7c673cae FG |
2353 | { |
2354 | set<CDir*> bounds; | |
f67539c2 | 2355 | mdcache->map_dirfrag_set(stat.bound_ls, bounds); |
7c673cae FG |
2356 | import_remove_pins(dir, bounds); |
2357 | import_reverse_final(dir); | |
2358 | } | |
2359 | ||
9f95a23c | 2360 | void Migrator::handle_export_cancel(const cref_t<MExportDirCancel> &m) |
7c673cae | 2361 | { |
9f95a23c | 2362 | dout(7) << "on " << m->get_dirfrag() << dendl; |
7c673cae FG |
2363 | dirfrag_t df = m->get_dirfrag(); |
2364 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(df); | |
2365 | if (it == import_state.end()) { | |
11fdf7f2 | 2366 | ceph_abort_msg("got export_cancel in weird state"); |
7c673cae FG |
2367 | } else if (it->second.state == IMPORT_DISCOVERING) { |
2368 | import_reverse_discovering(df); | |
2369 | } else if (it->second.state == IMPORT_DISCOVERED) { | |
f67539c2 | 2370 | CInode *in = mdcache->get_inode(df.ino); |
11fdf7f2 | 2371 | ceph_assert(in); |
7c673cae FG |
2372 | import_reverse_discovered(df, in); |
2373 | } else if (it->second.state == IMPORT_PREPPING) { | |
f67539c2 | 2374 | CDir *dir = mdcache->get_dirfrag(df); |
11fdf7f2 | 2375 | ceph_assert(dir); |
b32b8144 | 2376 | import_reverse_prepping(dir, it->second); |
7c673cae | 2377 | } else if (it->second.state == IMPORT_PREPPED) { |
f67539c2 | 2378 | CDir *dir = mdcache->get_dirfrag(df); |
11fdf7f2 | 2379 | ceph_assert(dir); |
7c673cae | 2380 | set<CDir*> bounds; |
f67539c2 | 2381 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2382 | import_remove_pins(dir, bounds); |
2383 | // adjust auth back to the exportor | |
f67539c2 | 2384 | mdcache->adjust_subtree_auth(dir, it->second.peer); |
7c673cae FG |
2385 | import_reverse_unfreeze(dir); |
2386 | } else { | |
11fdf7f2 | 2387 | ceph_abort_msg("got export_cancel in weird state"); |
7c673cae | 2388 | } |
7c673cae FG |
2389 | } |
2390 | ||
11fdf7f2 TL |
2391 | class C_MDS_ExportPrep : public MigratorContext { |
2392 | public: | |
9f95a23c | 2393 | C_MDS_ExportPrep(Migrator *mig, const cref_t<MExportDirPrep>& m) : MigratorContext(mig), m(m) {} |
11fdf7f2 TL |
2394 | void finish(int r) override { |
2395 | mig->handle_export_prep(m, true); | |
2396 | } | |
2397 | private: | |
9f95a23c | 2398 | cref_t<MExportDirPrep> m; |
11fdf7f2 TL |
2399 | }; |
2400 | ||
2401 | class C_MDS_ExportPrepFactory : public MDSContextFactory { | |
2402 | public: | |
9f95a23c | 2403 | C_MDS_ExportPrepFactory(Migrator *mig, cref_t<MExportDirPrep> m) : mig(mig), m(m) {} |
11fdf7f2 TL |
2404 | MDSContext *build() { |
2405 | return new C_MDS_ExportPrep(mig, m); | |
2406 | } | |
2407 | private: | |
2408 | Migrator *mig; | |
9f95a23c | 2409 | cref_t<MExportDirPrep> m; |
11fdf7f2 TL |
2410 | }; |
2411 | ||
9f95a23c TL |
2412 | void Migrator::decode_export_prep_trace(bufferlist::const_iterator& blp, mds_rank_t oldauth, MDSContext::vec& finished) |
2413 | { | |
2414 | DECODE_START(1, blp); | |
2415 | dirfrag_t df; | |
2416 | decode(df, blp); | |
2417 | char start; | |
2418 | decode(start, blp); | |
2419 | dout(10) << " trace from " << df << " start " << start << dendl; | |
2420 | ||
2421 | CDir *cur = nullptr; | |
2422 | if (start == 'd') { | |
f67539c2 | 2423 | cur = mdcache->get_dirfrag(df); |
9f95a23c TL |
2424 | ceph_assert(cur); |
2425 | dout(10) << " had " << *cur << dendl; | |
2426 | } else if (start == 'f') { | |
f67539c2 | 2427 | CInode *in = mdcache->get_inode(df.ino); |
9f95a23c TL |
2428 | ceph_assert(in); |
2429 | dout(10) << " had " << *in << dendl; | |
f67539c2 | 2430 | mdcache->decode_replica_dir(cur, blp, in, oldauth, finished); |
9f95a23c TL |
2431 | dout(10) << " added " << *cur << dendl; |
2432 | } else if (start == '-') { | |
2433 | // nothing | |
2434 | } else | |
2435 | ceph_abort_msg("unrecognized start char"); | |
2436 | ||
2437 | while (!blp.end()) { | |
2438 | CDentry *dn = nullptr; | |
f67539c2 | 2439 | mdcache->decode_replica_dentry(dn, blp, cur, finished); |
9f95a23c TL |
2440 | dout(10) << " added " << *dn << dendl; |
2441 | CInode *in = nullptr; | |
f67539c2 | 2442 | mdcache->decode_replica_inode(in, blp, dn, finished); |
9f95a23c TL |
2443 | dout(10) << " added " << *in << dendl; |
2444 | if (blp.end()) | |
2445 | break; | |
f67539c2 | 2446 | mdcache->decode_replica_dir(cur, blp, in, oldauth, finished); |
9f95a23c TL |
2447 | dout(10) << " added " << *cur << dendl; |
2448 | } | |
2449 | ||
2450 | DECODE_FINISH(blp); | |
2451 | } | |
2452 | ||
2453 | void Migrator::handle_export_prep(const cref_t<MExportDirPrep> &m, bool did_assim) | |
7c673cae FG |
2454 | { |
2455 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
11fdf7f2 | 2456 | ceph_assert(oldauth != mds->get_nodeid()); |
7c673cae FG |
2457 | |
2458 | CDir *dir; | |
2459 | CInode *diri; | |
11fdf7f2 | 2460 | MDSContext::vec finished; |
7c673cae FG |
2461 | |
2462 | // assimilate root dir. | |
2463 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
11fdf7f2 TL |
2464 | if (!did_assim) { |
2465 | ceph_assert(it != import_state.end()); | |
2466 | ceph_assert(it->second.state == IMPORT_DISCOVERED); | |
2467 | ceph_assert(it->second.peer == oldauth); | |
f67539c2 | 2468 | diri = mdcache->get_inode(m->get_dirfrag().ino); |
11fdf7f2 TL |
2469 | ceph_assert(diri); |
2470 | auto p = m->basedir.cbegin(); | |
f67539c2 | 2471 | mdcache->decode_replica_dir(dir, p, diri, oldauth, finished); |
9f95a23c | 2472 | dout(7) << "on " << *dir << " (first pass)" << dendl; |
7c673cae FG |
2473 | } else { |
2474 | if (it == import_state.end() || | |
2475 | it->second.peer != oldauth || | |
2476 | it->second.tid != m->get_tid()) { | |
9f95a23c | 2477 | dout(7) << "obsolete message, dropping" << dendl; |
7c673cae FG |
2478 | return; |
2479 | } | |
11fdf7f2 TL |
2480 | ceph_assert(it->second.state == IMPORT_PREPPING); |
2481 | ceph_assert(it->second.peer == oldauth); | |
7c673cae | 2482 | |
f67539c2 | 2483 | dir = mdcache->get_dirfrag(m->get_dirfrag()); |
11fdf7f2 | 2484 | ceph_assert(dir); |
9f95a23c | 2485 | dout(7) << "on " << *dir << " (subsequent pass)" << dendl; |
7c673cae FG |
2486 | diri = dir->get_inode(); |
2487 | } | |
11fdf7f2 | 2488 | ceph_assert(dir->is_auth() == false); |
7c673cae | 2489 | |
f67539c2 | 2490 | mdcache->show_subtrees(); |
7c673cae FG |
2491 | |
2492 | // build import bound map | |
2493 | map<inodeno_t, fragset_t> import_bound_fragset; | |
11fdf7f2 TL |
2494 | for (const auto &bound : m->get_bounds()) { |
2495 | dout(10) << " bound " << bound << dendl; | |
9f95a23c | 2496 | import_bound_fragset[bound.ino].insert_raw(bound.frag); |
7c673cae | 2497 | } |
7c673cae | 2498 | // assimilate contents? |
11fdf7f2 | 2499 | if (!did_assim) { |
7c673cae | 2500 | dout(7) << "doing assim on " << *dir << dendl; |
7c673cae FG |
2501 | |
2502 | // change import state | |
2503 | it->second.state = IMPORT_PREPPING; | |
2504 | it->second.bound_ls = m->get_bounds(); | |
2505 | it->second.bystanders = m->get_bystanders(); | |
11fdf7f2 | 2506 | ceph_assert(g_conf()->mds_kill_import_at != 3); |
7c673cae FG |
2507 | |
2508 | // bystander list | |
2509 | dout(7) << "bystanders are " << it->second.bystanders << dendl; | |
2510 | ||
2511 | // move pin to dir | |
2512 | diri->put(CInode::PIN_IMPORTING); | |
2513 | dir->get(CDir::PIN_IMPORTING); | |
2514 | dir->state_set(CDir::STATE_IMPORTING); | |
2515 | ||
2516 | // assimilate traces to exports | |
2517 | // each trace is: df ('-' | ('f' dir | 'd') dentry inode (dir dentry inode)*) | |
11fdf7f2 | 2518 | for (const auto &bl : m->traces) { |
9f95a23c TL |
2519 | auto blp = bl.cbegin(); |
2520 | decode_export_prep_trace(blp, oldauth, finished); | |
7c673cae FG |
2521 | } |
2522 | ||
2523 | // make bound sticky | |
2524 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2525 | p != import_bound_fragset.end(); | |
2526 | ++p) { | |
9f95a23c | 2527 | p->second.simplify(); |
f67539c2 | 2528 | CInode *in = mdcache->get_inode(p->first); |
11fdf7f2 | 2529 | ceph_assert(in); |
7c673cae FG |
2530 | in->get_stickydirs(); |
2531 | dout(7) << " set stickydirs on bound inode " << *in << dendl; | |
2532 | } | |
2533 | ||
2534 | } else { | |
2535 | dout(7) << " not doing assim on " << *dir << dendl; | |
2536 | } | |
2537 | ||
81eedcae | 2538 | MDSGatherBuilder gather(g_ceph_context); |
11fdf7f2 | 2539 | |
7c673cae FG |
2540 | if (!finished.empty()) |
2541 | mds->queue_waiters(finished); | |
2542 | ||
2543 | ||
c07f9fc5 FG |
2544 | bool success = true; |
2545 | if (mds->is_active()) { | |
2546 | // open all bounds | |
2547 | set<CDir*> import_bounds; | |
2548 | for (map<inodeno_t,fragset_t>::iterator p = import_bound_fragset.begin(); | |
2549 | p != import_bound_fragset.end(); | |
2550 | ++p) { | |
f67539c2 | 2551 | CInode *in = mdcache->get_inode(p->first); |
11fdf7f2 | 2552 | ceph_assert(in); |
7c673cae | 2553 | |
c07f9fc5 | 2554 | // map fragset into a frag_t list, based on the inode fragtree |
11fdf7f2 TL |
2555 | frag_vec_t leaves; |
2556 | for (const auto& frag : p->second) { | |
2557 | in->dirfragtree.get_leaves_under(frag, leaves); | |
2558 | } | |
2559 | dout(10) << " bound inode " << p->first << " fragset " << p->second << " maps to " << leaves << dendl; | |
c07f9fc5 | 2560 | |
11fdf7f2 | 2561 | for (const auto& leaf : leaves) { |
f67539c2 | 2562 | CDir *bound = mdcache->get_dirfrag(dirfrag_t(p->first, leaf)); |
c07f9fc5 | 2563 | if (!bound) { |
11fdf7f2 | 2564 | dout(7) << " opening bounding dirfrag " << leaf << " on " << *in << dendl; |
f67539c2 | 2565 | mdcache->open_remote_dirfrag(in, leaf, gather.new_sub()); |
81eedcae | 2566 | continue; |
c07f9fc5 | 2567 | } |
7c673cae | 2568 | |
c07f9fc5 FG |
2569 | if (!bound->state_test(CDir::STATE_IMPORTBOUND)) { |
2570 | dout(7) << " pinning import bound " << *bound << dendl; | |
2571 | bound->get(CDir::PIN_IMPORTBOUND); | |
2572 | bound->state_set(CDir::STATE_IMPORTBOUND); | |
2573 | } else { | |
2574 | dout(7) << " already pinned import bound " << *bound << dendl; | |
2575 | } | |
2576 | import_bounds.insert(bound); | |
7c673cae | 2577 | } |
7c673cae | 2578 | } |
7c673cae | 2579 | |
81eedcae TL |
2580 | if (gather.has_subs()) { |
2581 | C_MDS_ExportPrepFactory cf(this, m); | |
2582 | gather.set_finisher(cf.build()); | |
2583 | gather.activate(); | |
2584 | return; | |
2585 | } | |
2586 | ||
c07f9fc5 FG |
2587 | dout(7) << " all ready, noting auth and freezing import region" << dendl; |
2588 | ||
f67539c2 | 2589 | if (!mdcache->is_readonly() && |
9f95a23c TL |
2590 | // for pinning scatter gather. loner has a higher chance to get wrlock |
2591 | diri->filelock.can_wrlock(diri->get_loner()) && | |
2592 | diri->nestlock.can_wrlock(diri->get_loner())) { | |
c07f9fc5 FG |
2593 | it->second.mut = new MutationImpl(); |
2594 | // force some locks. hacky. | |
2595 | mds->locker->wrlock_force(&dir->inode->filelock, it->second.mut); | |
2596 | mds->locker->wrlock_force(&dir->inode->nestlock, it->second.mut); | |
2597 | ||
2598 | // note that i am an ambiguous auth for this subtree. | |
2599 | // specify bounds, since the exporter explicitly defines the region. | |
f67539c2 | 2600 | mdcache->adjust_bounded_subtree_auth(dir, import_bounds, |
c07f9fc5 | 2601 | pair<int,int>(oldauth, mds->get_nodeid())); |
f67539c2 | 2602 | mdcache->verify_subtree_bounds(dir, import_bounds); |
c07f9fc5 FG |
2603 | // freeze. |
2604 | dir->_freeze_tree(); | |
2605 | // note new state | |
2606 | it->second.state = IMPORT_PREPPED; | |
2607 | } else { | |
2608 | dout(7) << " couldn't acquire all needed locks, failing. " << *dir << dendl; | |
2609 | success = false; | |
2610 | } | |
7c673cae | 2611 | } else { |
c07f9fc5 | 2612 | dout(7) << " not active, failing. " << *dir << dendl; |
7c673cae | 2613 | success = false; |
7c673cae FG |
2614 | } |
2615 | ||
c07f9fc5 | 2616 | if (!success) |
b32b8144 | 2617 | import_reverse_prepping(dir, it->second); |
c07f9fc5 | 2618 | |
7c673cae FG |
2619 | // ok! |
2620 | dout(7) << " sending export_prep_ack on " << *dir << dendl; | |
9f95a23c | 2621 | mds->send_message(make_message<MExportDirPrepAck>(dir->dirfrag(), success, m->get_tid()), m->get_connection()); |
7c673cae | 2622 | |
11fdf7f2 | 2623 | ceph_assert(g_conf()->mds_kill_import_at != 4); |
7c673cae FG |
2624 | } |
2625 | ||
2626 | ||
2627 | ||
2628 | ||
2629 | class C_MDS_ImportDirLoggedStart : public MigratorLogContext { | |
2630 | dirfrag_t df; | |
2631 | CDir *dir; | |
2632 | mds_rank_t from; | |
2633 | public: | |
28e407b8 | 2634 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae FG |
2635 | |
2636 | C_MDS_ImportDirLoggedStart(Migrator *m, CDir *d, mds_rank_t f) : | |
2637 | MigratorLogContext(m), df(d->dirfrag()), dir(d), from(f) { | |
9f95a23c | 2638 | dir->get(CDir::PIN_PTRWAITER); |
7c673cae FG |
2639 | } |
2640 | void finish(int r) override { | |
28e407b8 | 2641 | mig->import_logged_start(df, dir, from, imported_session_map); |
9f95a23c | 2642 | dir->put(CDir::PIN_PTRWAITER); |
7c673cae FG |
2643 | } |
2644 | }; | |
2645 | ||
9f95a23c | 2646 | void Migrator::handle_export_dir(const cref_t<MExportDir> &m) |
7c673cae | 2647 | { |
20effc67 | 2648 | ceph_assert(g_conf()->mds_kill_import_at != 5); |
f67539c2 | 2649 | CDir *dir = mdcache->get_dirfrag(m->dirfrag); |
11fdf7f2 | 2650 | ceph_assert(dir); |
31f18b77 FG |
2651 | |
2652 | mds_rank_t oldauth = mds_rank_t(m->get_source().num()); | |
9f95a23c | 2653 | dout(7) << "importing " << *dir << " from " << oldauth << dendl; |
31f18b77 | 2654 | |
11fdf7f2 TL |
2655 | ceph_assert(!dir->is_auth()); |
2656 | ceph_assert(dir->freeze_tree_state); | |
7c673cae FG |
2657 | |
2658 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->dirfrag); | |
11fdf7f2 TL |
2659 | ceph_assert(it != import_state.end()); |
2660 | ceph_assert(it->second.state == IMPORT_PREPPED); | |
2661 | ceph_assert(it->second.tid == m->get_tid()); | |
2662 | ceph_assert(it->second.peer == oldauth); | |
7c673cae FG |
2663 | |
2664 | if (!dir->get_inode()->dirfragtree.is_leaf(dir->get_frag())) | |
2665 | dir->get_inode()->dirfragtree.force_to_leaf(g_ceph_context, dir->get_frag()); | |
2666 | ||
f67539c2 | 2667 | mdcache->show_subtrees(); |
7c673cae | 2668 | |
31f18b77 | 2669 | C_MDS_ImportDirLoggedStart *onlogged = new C_MDS_ImportDirLoggedStart(this, dir, oldauth); |
7c673cae FG |
2670 | |
2671 | // start the journal entry | |
31f18b77 | 2672 | EImportStart *le = new EImportStart(mds->mdlog, dir->dirfrag(), m->bounds, oldauth); |
7c673cae FG |
2673 | mds->mdlog->start_entry(le); |
2674 | ||
2675 | le->metablob.add_dir_context(dir); | |
2676 | ||
2677 | // adjust auth (list us _first_) | |
f67539c2 | 2678 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), oldauth); |
7c673cae FG |
2679 | |
2680 | // new client sessions, open these after we journal | |
2681 | // include imported sessions in EImportStart | |
11fdf7f2 | 2682 | auto cmp = m->client_map.cbegin(); |
28e407b8 | 2683 | map<client_t,entity_inst_t> client_map; |
11fdf7f2 | 2684 | map<client_t,client_metadata_t> client_metadata_map; |
28e407b8 | 2685 | decode(client_map, cmp); |
11fdf7f2 TL |
2686 | decode(client_metadata_map, cmp); |
2687 | ceph_assert(cmp.end()); | |
2688 | le->cmapv = mds->server->prepare_force_open_sessions(client_map, client_metadata_map, | |
2689 | onlogged->imported_session_map); | |
28e407b8 | 2690 | encode(client_map, le->client_map, mds->mdsmap->get_up_features()); |
11fdf7f2 | 2691 | encode(client_metadata_map, le->client_map); |
7c673cae | 2692 | |
11fdf7f2 | 2693 | auto blp = m->export_data.cbegin(); |
7c673cae FG |
2694 | int num_imported_inodes = 0; |
2695 | while (!blp.end()) { | |
9f95a23c TL |
2696 | decode_import_dir(blp, |
2697 | oldauth, | |
2698 | dir, // import root | |
2699 | le, | |
2700 | mds->mdlog->get_current_segment(), | |
2701 | it->second.peer_exports, | |
2702 | it->second.updated_scatterlocks, | |
2703 | num_imported_inodes); | |
7c673cae FG |
2704 | } |
2705 | dout(10) << " " << m->bounds.size() << " imported bounds" << dendl; | |
2706 | ||
2707 | // include bounds in EImportStart | |
2708 | set<CDir*> import_bounds; | |
11fdf7f2 | 2709 | for (const auto &bound : m->bounds) { |
f67539c2 | 2710 | CDir *bd = mdcache->get_dirfrag(bound); |
11fdf7f2 | 2711 | ceph_assert(bd); |
7c673cae FG |
2712 | le->metablob.add_dir(bd, false); // note that parent metadata is already in the event |
2713 | import_bounds.insert(bd); | |
2714 | } | |
f67539c2 | 2715 | mdcache->verify_subtree_bounds(dir, import_bounds); |
7c673cae FG |
2716 | |
2717 | // adjust popularity | |
11fdf7f2 | 2718 | mds->balancer->add_import(dir); |
7c673cae | 2719 | |
9f95a23c | 2720 | dout(7) << "did " << *dir << dendl; |
7c673cae FG |
2721 | |
2722 | // note state | |
2723 | it->second.state = IMPORT_LOGGINGSTART; | |
20effc67 | 2724 | ceph_assert(g_conf()->mds_kill_import_at != 6); |
7c673cae FG |
2725 | |
2726 | // log it | |
2727 | mds->mdlog->submit_entry(le, onlogged); | |
2728 | mds->mdlog->flush(); | |
2729 | ||
2730 | // some stats | |
2731 | if (mds->logger) { | |
2732 | mds->logger->inc(l_mds_imported); | |
2733 | mds->logger->inc(l_mds_imported_inodes, num_imported_inodes); | |
2734 | } | |
7c673cae FG |
2735 | } |
2736 | ||
2737 | ||
2738 | /* | |
2739 | * this is an import helper | |
2740 | * called by import_finish, and import_reverse and friends. | |
2741 | */ | |
2742 | void Migrator::import_remove_pins(CDir *dir, set<CDir*>& bounds) | |
2743 | { | |
2744 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2745 | // root | |
2746 | dir->put(CDir::PIN_IMPORTING); | |
2747 | dir->state_clear(CDir::STATE_IMPORTING); | |
2748 | ||
2749 | // bounding inodes | |
2750 | set<inodeno_t> did; | |
2751 | for (list<dirfrag_t>::iterator p = stat.bound_ls.begin(); | |
2752 | p != stat.bound_ls.end(); | |
2753 | ++p) { | |
2754 | if (did.count(p->ino)) | |
2755 | continue; | |
2756 | did.insert(p->ino); | |
f67539c2 | 2757 | CInode *in = mdcache->get_inode(p->ino); |
11fdf7f2 | 2758 | ceph_assert(in); |
7c673cae FG |
2759 | in->put_stickydirs(); |
2760 | } | |
2761 | ||
2762 | if (stat.state == IMPORT_PREPPING) { | |
2763 | for (auto bd : bounds) { | |
2764 | if (bd->state_test(CDir::STATE_IMPORTBOUND)) { | |
2765 | bd->put(CDir::PIN_IMPORTBOUND); | |
2766 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2767 | } | |
2768 | } | |
2769 | } else if (stat.state >= IMPORT_PREPPED) { | |
2770 | // bounding dirfrags | |
2771 | for (auto bd : bounds) { | |
11fdf7f2 | 2772 | ceph_assert(bd->state_test(CDir::STATE_IMPORTBOUND)); |
7c673cae FG |
2773 | bd->put(CDir::PIN_IMPORTBOUND); |
2774 | bd->state_clear(CDir::STATE_IMPORTBOUND); | |
2775 | } | |
2776 | } | |
2777 | } | |
2778 | ||
91327a77 AA |
2779 | class C_MDC_QueueContexts : public MigratorContext { |
2780 | public: | |
11fdf7f2 | 2781 | MDSContext::vec contexts; |
91327a77 AA |
2782 | C_MDC_QueueContexts(Migrator *m) : MigratorContext(m) {} |
2783 | void finish(int r) override { | |
2784 | // execute contexts immediately after 'this' context | |
2785 | get_mds()->queue_waiters_front(contexts); | |
2786 | } | |
2787 | }; | |
7c673cae FG |
2788 | |
2789 | /* | |
2790 | * note: this does teh full work of reversing and import and cleaning up | |
2791 | * state. | |
2792 | * called by both handle_mds_failure and by handle_resolve (if we are | |
2793 | * a survivor coping with an exporter failure+recovery). | |
2794 | */ | |
2795 | void Migrator::import_reverse(CDir *dir) | |
2796 | { | |
9f95a23c | 2797 | dout(7) << *dir << dendl; |
7c673cae FG |
2798 | |
2799 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2800 | stat.state = IMPORT_ABORTING; | |
2801 | ||
2802 | set<CDir*> bounds; | |
f67539c2 | 2803 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
2804 | |
2805 | // remove pins | |
2806 | import_remove_pins(dir, bounds); | |
2807 | ||
2808 | // update auth, with possible subtree merge. | |
11fdf7f2 | 2809 | ceph_assert(dir->is_subtree_root()); |
7c673cae | 2810 | if (mds->is_resolve()) |
f67539c2 | 2811 | mdcache->trim_non_auth_subtree(dir); |
7c673cae | 2812 | |
f67539c2 | 2813 | mdcache->adjust_subtree_auth(dir, stat.peer); |
7c673cae | 2814 | |
91327a77 | 2815 | auto fin = new C_MDC_QueueContexts(this); |
7c673cae FG |
2816 | if (!dir->get_inode()->is_auth() && |
2817 | !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2818 | dir->get_inode()->clear_scatter_dirty(); | |
2819 | // wake up scatter_nudge waiters | |
2820 | dir->get_inode()->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2821 | } | |
2822 | ||
2823 | int num_dentries = 0; | |
2824 | // adjust auth bits. | |
9f95a23c | 2825 | std::deque<CDir*> q; |
7c673cae FG |
2826 | q.push_back(dir); |
2827 | while (!q.empty()) { | |
2828 | CDir *cur = q.front(); | |
2829 | q.pop_front(); | |
2830 | ||
2831 | // dir | |
11fdf7f2 | 2832 | cur->abort_import(); |
7c673cae | 2833 | |
94b18763 FG |
2834 | for (auto &p : *cur) { |
2835 | CDentry *dn = p.second; | |
7c673cae FG |
2836 | |
2837 | // dentry | |
1e59de90 | 2838 | dn->clear_auth(); |
7c673cae FG |
2839 | dn->clear_replica_map(); |
2840 | dn->set_replica_nonce(CDentry::EXPORT_NONCE); | |
2841 | if (dn->is_dirty()) | |
2842 | dn->mark_clean(); | |
2843 | ||
2844 | // inode? | |
2845 | if (dn->get_linkage()->is_primary()) { | |
2846 | CInode *in = dn->get_linkage()->get_inode(); | |
1e59de90 | 2847 | in->state_clear(CInode::STATE_AUTH); |
7c673cae FG |
2848 | in->clear_replica_map(); |
2849 | in->set_replica_nonce(CInode::EXPORT_NONCE); | |
2850 | if (in->is_dirty()) | |
2851 | in->mark_clean(); | |
2852 | in->clear_dirty_rstat(); | |
2853 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
2854 | in->clear_scatter_dirty(); | |
2855 | in->take_waiting(CInode::WAIT_ANY_MASK, fin->contexts); | |
2856 | } | |
2857 | ||
2858 | in->clear_dirty_parent(); | |
2859 | ||
f91f0fd5 TL |
2860 | in->clear_clientwriteable(); |
2861 | in->state_clear(CInode::STATE_NEEDSRECOVER); | |
2862 | ||
7c673cae FG |
2863 | in->authlock.clear_gather(); |
2864 | in->linklock.clear_gather(); | |
2865 | in->dirfragtreelock.clear_gather(); | |
2866 | in->filelock.clear_gather(); | |
2867 | ||
2868 | in->clear_file_locks(); | |
2869 | ||
2870 | // non-bounding dir? | |
9f95a23c TL |
2871 | auto&& dfs = in->get_dirfrags(); |
2872 | for (const auto& dir : dfs) { | |
2873 | if (bounds.count(dir) == 0) | |
2874 | q.push_back(dir); | |
2875 | } | |
7c673cae FG |
2876 | } |
2877 | ||
f67539c2 | 2878 | mdcache->touch_dentry_bottom(dn); // move dentry to tail of LRU |
7c673cae FG |
2879 | ++num_dentries; |
2880 | } | |
2881 | } | |
2882 | ||
2883 | dir->add_waiter(CDir::WAIT_UNFREEZE, fin); | |
2884 | ||
2885 | if (stat.state == IMPORT_ACKING) { | |
2886 | // remove imported caps | |
2887 | for (map<CInode*,map<client_t,Capability::Export> >::iterator p = stat.peer_exports.begin(); | |
28e407b8 AA |
2888 | p != stat.peer_exports.end(); |
2889 | ++p) { | |
7c673cae FG |
2890 | CInode *in = p->first; |
2891 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); | |
28e407b8 AA |
2892 | q != p->second.end(); |
2893 | ++q) { | |
7c673cae | 2894 | Capability *cap = in->get_client_cap(q->first); |
28e407b8 | 2895 | if (!cap) { |
11fdf7f2 | 2896 | ceph_assert(!stat.session_map.count(q->first)); |
28e407b8 AA |
2897 | continue; |
2898 | } | |
7c673cae FG |
2899 | if (cap->is_importing()) |
2900 | in->remove_client_cap(q->first); | |
f91f0fd5 TL |
2901 | else |
2902 | cap->clear_clientwriteable(); | |
7c673cae FG |
2903 | } |
2904 | in->put(CInode::PIN_IMPORTINGCAPS); | |
2905 | } | |
28e407b8 AA |
2906 | for (auto& p : stat.session_map) { |
2907 | Session *session = p.second.first; | |
7c673cae FG |
2908 | session->dec_importing(); |
2909 | } | |
2910 | } | |
2911 | ||
2912 | // log our failure | |
2913 | mds->mdlog->start_submit_entry(new EImportFinish(dir, false)); // log failure | |
2914 | ||
f67539c2 | 2915 | mdcache->trim(num_dentries); // try trimming dentries |
7c673cae FG |
2916 | |
2917 | // notify bystanders; wait in aborting state | |
2918 | import_notify_abort(dir, bounds); | |
2919 | } | |
2920 | ||
2921 | void Migrator::import_notify_finish(CDir *dir, set<CDir*>& bounds) | |
2922 | { | |
9f95a23c | 2923 | dout(7) << *dir << dendl; |
7c673cae FG |
2924 | |
2925 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2926 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2927 | p != stat.bystanders.end(); | |
2928 | ++p) { | |
9f95a23c | 2929 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, false, |
11fdf7f2 TL |
2930 | pair<int,int>(stat.peer, mds->get_nodeid()), |
2931 | pair<int,int>(mds->get_nodeid(), CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2932 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
2933 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2934 | mds->send_message_mds(notify, *p); | |
2935 | } | |
2936 | } | |
2937 | ||
2938 | void Migrator::import_notify_abort(CDir *dir, set<CDir*>& bounds) | |
2939 | { | |
9f95a23c | 2940 | dout(7) << *dir << dendl; |
7c673cae FG |
2941 | |
2942 | import_state_t& stat = import_state[dir->dirfrag()]; | |
2943 | for (set<mds_rank_t>::iterator p = stat.bystanders.begin(); | |
2944 | p != stat.bystanders.end(); ) { | |
2945 | if (mds->is_cluster_degraded() && | |
2946 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(*p)) { | |
2947 | // this can happen if both exporter and bystander fail in the same mdsmap epoch | |
2948 | stat.bystanders.erase(p++); | |
2949 | continue; | |
2950 | } | |
9f95a23c | 2951 | auto notify = make_message<MExportDirNotify>(dir->dirfrag(), stat.tid, true, |
11fdf7f2 TL |
2952 | mds_authority_t(stat.peer, mds->get_nodeid()), |
2953 | mds_authority_t(stat.peer, CDIR_AUTH_UNKNOWN)); | |
7c673cae FG |
2954 | for (set<CDir*>::iterator i = bounds.begin(); i != bounds.end(); ++i) |
2955 | notify->get_bounds().push_back((*i)->dirfrag()); | |
2956 | mds->send_message_mds(notify, *p); | |
2957 | ++p; | |
2958 | } | |
2959 | if (stat.bystanders.empty()) { | |
2960 | dout(7) << "no bystanders, finishing reverse now" << dendl; | |
2961 | import_reverse_unfreeze(dir); | |
2962 | } else { | |
20effc67 | 2963 | ceph_assert(g_conf()->mds_kill_import_at != 10); |
7c673cae FG |
2964 | } |
2965 | } | |
2966 | ||
2967 | void Migrator::import_reverse_unfreeze(CDir *dir) | |
2968 | { | |
9f95a23c | 2969 | dout(7) << *dir << dendl; |
11fdf7f2 | 2970 | ceph_assert(!dir->is_auth()); |
f67539c2 | 2971 | mdcache->discard_delayed_expire(dir); |
224ce89b WB |
2972 | dir->unfreeze_tree(); |
2973 | if (dir->is_subtree_root()) | |
f67539c2 | 2974 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
2975 | import_reverse_final(dir); |
2976 | } | |
2977 | ||
2978 | void Migrator::import_reverse_final(CDir *dir) | |
2979 | { | |
9f95a23c | 2980 | dout(7) << *dir << dendl; |
7c673cae FG |
2981 | |
2982 | // clean up | |
2983 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
11fdf7f2 | 2984 | ceph_assert(it != import_state.end()); |
7c673cae FG |
2985 | |
2986 | MutationRef mut = it->second.mut; | |
2987 | import_state.erase(it); | |
2988 | ||
2989 | // send pending import_maps? | |
f67539c2 | 2990 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
2991 | |
2992 | if (mut) { | |
2993 | mds->locker->drop_locks(mut.get()); | |
2994 | mut->cleanup(); | |
2995 | } | |
2996 | ||
f67539c2 | 2997 | mdcache->show_subtrees(); |
7c673cae FG |
2998 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) |
2999 | } | |
3000 | ||
3001 | ||
3002 | ||
3003 | ||
3004 | void Migrator::import_logged_start(dirfrag_t df, CDir *dir, mds_rank_t from, | |
28e407b8 | 3005 | map<client_t,pair<Session*,uint64_t> >& imported_session_map) |
7c673cae | 3006 | { |
9f95a23c TL |
3007 | dout(7) << *dir << dendl; |
3008 | ||
7c673cae FG |
3009 | map<dirfrag_t, import_state_t>::iterator it = import_state.find(dir->dirfrag()); |
3010 | if (it == import_state.end() || | |
3011 | it->second.state != IMPORT_LOGGINGSTART) { | |
3012 | dout(7) << "import " << df << " must have aborted" << dendl; | |
28e407b8 | 3013 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae FG |
3014 | return; |
3015 | } | |
3016 | ||
7c673cae FG |
3017 | // note state |
3018 | it->second.state = IMPORT_ACKING; | |
3019 | ||
20effc67 | 3020 | ceph_assert(g_conf()->mds_kill_import_at != 7); |
7c673cae FG |
3021 | |
3022 | // force open client sessions and finish cap import | |
28e407b8 | 3023 | mds->server->finish_force_open_sessions(imported_session_map, false); |
7c673cae FG |
3024 | |
3025 | map<inodeno_t,map<client_t,Capability::Import> > imported_caps; | |
3026 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
3027 | p != it->second.peer_exports.end(); | |
3028 | ++p) { | |
3029 | // parameter 'peer' is NONE, delay sending cap import messages to client | |
28e407b8 AA |
3030 | finish_import_inode_caps(p->first, MDS_RANK_NONE, true, imported_session_map, |
3031 | p->second, imported_caps[p->first->ino()]); | |
7c673cae | 3032 | } |
28e407b8 AA |
3033 | |
3034 | it->second.session_map.swap(imported_session_map); | |
7c673cae FG |
3035 | |
3036 | // send notify's etc. | |
3037 | dout(7) << "sending ack for " << *dir << " to old auth mds." << from << dendl; | |
3038 | ||
3039 | // test surviving observer of a failed migration that did not complete | |
3040 | //assert(dir->replica_map.size() < 2 || mds->get_nodeid() != 0); | |
3041 | ||
9f95a23c | 3042 | auto ack = make_message<MExportDirAck>(dir->dirfrag(), it->second.tid); |
11fdf7f2 | 3043 | encode(imported_caps, ack->imported_caps); |
7c673cae FG |
3044 | |
3045 | mds->send_message_mds(ack, from); | |
20effc67 | 3046 | ceph_assert(g_conf()->mds_kill_import_at != 8); |
7c673cae | 3047 | |
f67539c2 | 3048 | mdcache->show_subtrees(); |
7c673cae FG |
3049 | } |
3050 | ||
9f95a23c | 3051 | void Migrator::handle_export_finish(const cref_t<MExportDirFinish> &m) |
7c673cae | 3052 | { |
f67539c2 | 3053 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
11fdf7f2 | 3054 | ceph_assert(dir); |
9f95a23c | 3055 | dout(7) << *dir << (m->is_last() ? " last" : "") << dendl; |
7c673cae FG |
3056 | |
3057 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(m->get_dirfrag()); | |
11fdf7f2 TL |
3058 | ceph_assert(it != import_state.end()); |
3059 | ceph_assert(it->second.tid == m->get_tid()); | |
7c673cae FG |
3060 | |
3061 | import_finish(dir, false, m->is_last()); | |
7c673cae FG |
3062 | } |
3063 | ||
3064 | void Migrator::import_finish(CDir *dir, bool notify, bool last) | |
3065 | { | |
9f95a23c | 3066 | dout(7) << *dir << dendl; |
7c673cae FG |
3067 | |
3068 | map<dirfrag_t,import_state_t>::iterator it = import_state.find(dir->dirfrag()); | |
11fdf7f2 TL |
3069 | ceph_assert(it != import_state.end()); |
3070 | ceph_assert(it->second.state == IMPORT_ACKING || it->second.state == IMPORT_FINISHING); | |
7c673cae | 3071 | |
224ce89b | 3072 | if (it->second.state == IMPORT_ACKING) { |
11fdf7f2 | 3073 | ceph_assert(dir->is_auth()); |
f67539c2 | 3074 | mdcache->adjust_subtree_auth(dir, mds->get_nodeid(), mds->get_nodeid()); |
224ce89b WB |
3075 | } |
3076 | ||
7c673cae | 3077 | // log finish |
11fdf7f2 | 3078 | ceph_assert(g_conf()->mds_kill_import_at != 9); |
7c673cae FG |
3079 | |
3080 | if (it->second.state == IMPORT_ACKING) { | |
3081 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = it->second.peer_exports.begin(); | |
3082 | p != it->second.peer_exports.end(); | |
3083 | ++p) { | |
3084 | CInode *in = p->first; | |
11fdf7f2 | 3085 | ceph_assert(in->is_auth()); |
7c673cae FG |
3086 | for (map<client_t,Capability::Export>::iterator q = p->second.begin(); |
3087 | q != p->second.end(); | |
3088 | ++q) { | |
28e407b8 AA |
3089 | auto r = it->second.session_map.find(q->first); |
3090 | if (r == it->second.session_map.end()) | |
3091 | continue; | |
3092 | ||
3093 | Session *session = r->second.first; | |
7c673cae | 3094 | Capability *cap = in->get_client_cap(q->first); |
11fdf7f2 | 3095 | ceph_assert(cap); |
7c673cae FG |
3096 | cap->merge(q->second, true); |
3097 | cap->clear_importing(); | |
f67539c2 | 3098 | mdcache->do_cap_import(session, in, cap, q->second.cap_id, q->second.seq, |
7c673cae FG |
3099 | q->second.mseq - 1, it->second.peer, CEPH_CAP_FLAG_AUTH); |
3100 | } | |
3101 | p->second.clear(); | |
3102 | in->replica_caps_wanted = 0; | |
3103 | } | |
28e407b8 AA |
3104 | for (auto& p : it->second.session_map) { |
3105 | Session *session = p.second.first; | |
7c673cae FG |
3106 | session->dec_importing(); |
3107 | } | |
3108 | } | |
3109 | ||
3110 | if (!last) { | |
11fdf7f2 | 3111 | ceph_assert(it->second.state == IMPORT_ACKING); |
7c673cae FG |
3112 | it->second.state = IMPORT_FINISHING; |
3113 | return; | |
3114 | } | |
3115 | ||
3116 | // remove pins | |
3117 | set<CDir*> bounds; | |
f67539c2 | 3118 | mdcache->get_subtree_bounds(dir, bounds); |
7c673cae FG |
3119 | |
3120 | if (notify) | |
3121 | import_notify_finish(dir, bounds); | |
3122 | ||
3123 | import_remove_pins(dir, bounds); | |
3124 | ||
3125 | map<CInode*, map<client_t,Capability::Export> > peer_exports; | |
3126 | it->second.peer_exports.swap(peer_exports); | |
3127 | ||
3128 | // clear import state (we're done!) | |
3129 | MutationRef mut = it->second.mut; | |
3130 | import_state.erase(it); | |
3131 | ||
7c673cae FG |
3132 | mds->mdlog->start_submit_entry(new EImportFinish(dir, true)); |
3133 | ||
7c673cae | 3134 | // process delayed expires |
f67539c2 | 3135 | mdcache->process_delayed_expire(dir); |
7c673cae | 3136 | |
224ce89b | 3137 | // unfreeze tree, with possible subtree merge. |
7c673cae | 3138 | dir->unfreeze_tree(); |
f67539c2 | 3139 | mdcache->try_subtree_merge(dir); |
224ce89b | 3140 | |
f67539c2 | 3141 | mdcache->show_subtrees(); |
7c673cae FG |
3142 | //audit(); // this fails, bc we munge up the subtree map during handle_import_map (resolve phase) |
3143 | ||
3144 | if (mut) { | |
3145 | mds->locker->drop_locks(mut.get()); | |
3146 | mut->cleanup(); | |
3147 | } | |
3148 | ||
3149 | // re-eval imported caps | |
3150 | for (map<CInode*, map<client_t,Capability::Export> >::iterator p = peer_exports.begin(); | |
3151 | p != peer_exports.end(); | |
3152 | ++p) { | |
3153 | if (p->first->is_auth()) | |
3154 | mds->locker->eval(p->first, CEPH_CAP_LOCKS, true); | |
3155 | p->first->put(CInode::PIN_IMPORTINGCAPS); | |
3156 | } | |
3157 | ||
3158 | // send pending import_maps? | |
f67539c2 | 3159 | mdcache->maybe_send_pending_resolves(); |
7c673cae FG |
3160 | |
3161 | // did i just import mydir? | |
3162 | if (dir->ino() == MDS_INO_MDSDIR(mds->get_nodeid())) | |
f67539c2 | 3163 | mdcache->populate_mydir(); |
7c673cae FG |
3164 | |
3165 | // is it empty? | |
3166 | if (dir->get_num_head_items() == 0 && | |
3167 | !dir->inode->is_auth()) { | |
3168 | // reexport! | |
3169 | export_empty_import(dir); | |
3170 | } | |
3171 | } | |
3172 | ||
11fdf7f2 | 3173 | void Migrator::decode_import_inode(CDentry *dn, bufferlist::const_iterator& blp, |
7c673cae FG |
3174 | mds_rank_t oldauth, LogSegment *ls, |
3175 | map<CInode*, map<client_t,Capability::Export> >& peer_exports, | |
3176 | list<ScatterLock*>& updated_scatterlocks) | |
9f95a23c TL |
3177 | { |
3178 | CInode *in; | |
3179 | bool added = false; | |
3180 | DECODE_START(1, blp); | |
3181 | dout(15) << " on " << *dn << dendl; | |
7c673cae FG |
3182 | |
3183 | inodeno_t ino; | |
3184 | snapid_t last; | |
11fdf7f2 TL |
3185 | decode(ino, blp); |
3186 | decode(last, blp); | |
7c673cae | 3187 | |
f67539c2 | 3188 | in = mdcache->get_inode(ino, last); |
7c673cae | 3189 | if (!in) { |
f67539c2 | 3190 | in = new CInode(mds->mdcache, true, 2, last); |
7c673cae FG |
3191 | added = true; |
3192 | } | |
3193 | ||
3194 | // state after link -- or not! -sage | |
3195 | in->decode_import(blp, ls); // cap imports are noted for later action | |
3196 | ||
3197 | // caps | |
3198 | decode_import_inode_caps(in, true, blp, peer_exports); | |
3199 | ||
9f95a23c TL |
3200 | DECODE_FINISH(blp); |
3201 | ||
7c673cae FG |
3202 | // link before state -- or not! -sage |
3203 | if (dn->get_linkage()->get_inode() != in) { | |
11fdf7f2 | 3204 | ceph_assert(!dn->get_linkage()->get_inode()); |
7c673cae FG |
3205 | dn->dir->link_primary_inode(dn, in); |
3206 | } | |
28e407b8 AA |
3207 | |
3208 | if (in->is_dir()) | |
3209 | dn->dir->pop_lru_subdirs.push_back(&in->item_pop_lru); | |
7c673cae FG |
3210 | |
3211 | // add inode? | |
3212 | if (added) { | |
f67539c2 | 3213 | mdcache->add_inode(in); |
7c673cae FG |
3214 | dout(10) << "added " << *in << dendl; |
3215 | } else { | |
3216 | dout(10) << " had " << *in << dendl; | |
3217 | } | |
3218 | ||
f67539c2 | 3219 | if (in->get_inode()->is_dirty_rstat()) |
7c673cae | 3220 | in->mark_dirty_rstat(); |
f91f0fd5 | 3221 | |
f67539c2 | 3222 | if (!in->get_inode()->client_ranges.empty()) |
f91f0fd5 | 3223 | in->mark_clientwriteable(); |
7c673cae FG |
3224 | |
3225 | // clear if dirtyscattered, since we're going to journal this | |
3226 | // but not until we _actually_ finish the import... | |
3227 | if (in->filelock.is_dirty()) { | |
3228 | updated_scatterlocks.push_back(&in->filelock); | |
3229 | mds->locker->mark_updated_scatterlock(&in->filelock); | |
3230 | } | |
3231 | ||
3232 | if (in->dirfragtreelock.is_dirty()) { | |
3233 | updated_scatterlocks.push_back(&in->dirfragtreelock); | |
3234 | mds->locker->mark_updated_scatterlock(&in->dirfragtreelock); | |
3235 | } | |
3236 | ||
3237 | // adjust replica list | |
3238 | //assert(!in->is_replica(oldauth)); // not true on failed export | |
3239 | in->add_replica(oldauth, CInode::EXPORT_NONCE); | |
3240 | if (in->is_replica(mds->get_nodeid())) | |
3241 | in->remove_replica(mds->get_nodeid()); | |
11fdf7f2 TL |
3242 | |
3243 | if (in->snaplock.is_stable() && | |
3244 | in->snaplock.get_state() != LOCK_SYNC) | |
3245 | mds->locker->try_eval(&in->snaplock, NULL); | |
9f95a23c TL |
3246 | |
3247 | if (in->policylock.is_stable() && | |
3248 | in->policylock.get_state() != LOCK_SYNC) | |
3249 | mds->locker->try_eval(&in->policylock, NULL); | |
7c673cae FG |
3250 | } |
3251 | ||
3252 | void Migrator::decode_import_inode_caps(CInode *in, bool auth_cap, | |
11fdf7f2 | 3253 | bufferlist::const_iterator &blp, |
7c673cae FG |
3254 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) |
3255 | { | |
9f95a23c | 3256 | DECODE_START(1, blp); |
7c673cae | 3257 | map<client_t,Capability::Export> cap_map; |
11fdf7f2 TL |
3258 | decode(cap_map, blp); |
3259 | if (auth_cap) { | |
3260 | mempool::mds_co::compact_map<int32_t,int32_t> mds_wanted; | |
3261 | decode(mds_wanted, blp); | |
3262 | mds_wanted.erase(mds->get_nodeid()); | |
3263 | in->set_mds_caps_wanted(mds_wanted); | |
3264 | } | |
7c673cae | 3265 | if (!cap_map.empty() || |
b32b8144 | 3266 | (auth_cap && (in->get_caps_wanted() & ~CEPH_CAP_PIN))) { |
7c673cae FG |
3267 | peer_exports[in].swap(cap_map); |
3268 | in->get(CInode::PIN_IMPORTINGCAPS); | |
3269 | } | |
9f95a23c | 3270 | DECODE_FINISH(blp); |
7c673cae FG |
3271 | } |
3272 | ||
3273 | void Migrator::finish_import_inode_caps(CInode *in, mds_rank_t peer, bool auth_cap, | |
28e407b8 AA |
3274 | const map<client_t,pair<Session*,uint64_t> >& session_map, |
3275 | const map<client_t,Capability::Export> &export_map, | |
7c673cae FG |
3276 | map<client_t,Capability::Import> &import_map) |
3277 | { | |
f91f0fd5 TL |
3278 | const auto& client_ranges = in->get_projected_inode()->client_ranges; |
3279 | auto r = client_ranges.cbegin(); | |
3280 | bool needs_recover = false; | |
3281 | ||
28e407b8 | 3282 | for (auto& it : export_map) { |
9f95a23c | 3283 | dout(10) << "for client." << it.first << " on " << *in << dendl; |
28e407b8 AA |
3284 | |
3285 | auto p = session_map.find(it.first); | |
3286 | if (p == session_map.end()) { | |
3287 | dout(10) << " no session for client." << it.first << dendl; | |
3288 | (void)import_map[it.first]; | |
3289 | continue; | |
3290 | } | |
7c673cae | 3291 | |
28e407b8 AA |
3292 | Session *session = p->second.first; |
3293 | ||
3294 | Capability *cap = in->get_client_cap(it.first); | |
7c673cae | 3295 | if (!cap) { |
28e407b8 | 3296 | cap = in->add_client_cap(it.first, session); |
7c673cae FG |
3297 | if (peer < 0) |
3298 | cap->mark_importing(); | |
3299 | } | |
3300 | ||
f91f0fd5 TL |
3301 | if (auth_cap) { |
3302 | while (r != client_ranges.cend() && r->first < it.first) { | |
3303 | needs_recover = true; | |
3304 | ++r; | |
3305 | } | |
3306 | if (r != client_ranges.cend() && r->first == it.first) { | |
3307 | cap->mark_clientwriteable(); | |
3308 | ++r; | |
3309 | } | |
3310 | } | |
3311 | ||
1adf2230 AA |
3312 | // Always ask exporter mds to send cap export messages for auth caps. |
3313 | // For non-auth caps, ask exporter mds to send cap export messages to | |
3314 | // clients who haven't opened sessions. The cap export messages will | |
3315 | // make clients open sessions. | |
11fdf7f2 | 3316 | if (auth_cap || !session->get_connection()) { |
1adf2230 AA |
3317 | Capability::Import& im = import_map[it.first]; |
3318 | im.cap_id = cap->get_cap_id(); | |
3319 | im.mseq = auth_cap ? it.second.mseq : cap->get_mseq(); | |
3320 | im.issue_seq = cap->get_last_seq() + 1; | |
3321 | } | |
7c673cae FG |
3322 | |
3323 | if (peer >= 0) { | |
28e407b8 | 3324 | cap->merge(it.second, auth_cap); |
f67539c2 | 3325 | mdcache->do_cap_import(session, in, cap, it.second.cap_id, |
28e407b8 | 3326 | it.second.seq, it.second.mseq - 1, peer, |
7c673cae FG |
3327 | auth_cap ? CEPH_CAP_FLAG_AUTH : CEPH_CAP_FLAG_RELEASE); |
3328 | } | |
3329 | } | |
3330 | ||
f91f0fd5 TL |
3331 | if (auth_cap) { |
3332 | if (r != client_ranges.cend()) | |
3333 | needs_recover = true; | |
3334 | if (needs_recover) | |
3335 | in->state_set(CInode::STATE_NEEDSRECOVER); | |
3336 | } | |
3337 | ||
7c673cae FG |
3338 | if (peer >= 0) { |
3339 | in->replica_caps_wanted = 0; | |
3340 | in->put(CInode::PIN_IMPORTINGCAPS); | |
3341 | } | |
3342 | } | |
3343 | ||
9f95a23c | 3344 | void Migrator::decode_import_dir(bufferlist::const_iterator& blp, |
7c673cae FG |
3345 | mds_rank_t oldauth, |
3346 | CDir *import_root, | |
3347 | EImportStart *le, | |
3348 | LogSegment *ls, | |
3349 | map<CInode*,map<client_t,Capability::Export> >& peer_exports, | |
9f95a23c | 3350 | list<ScatterLock*>& updated_scatterlocks, int &num_imported) |
7c673cae | 3351 | { |
9f95a23c | 3352 | DECODE_START(1, blp); |
7c673cae FG |
3353 | // set up dir |
3354 | dirfrag_t df; | |
11fdf7f2 | 3355 | decode(df, blp); |
7c673cae | 3356 | |
f67539c2 | 3357 | CInode *diri = mdcache->get_inode(df.ino); |
11fdf7f2 | 3358 | ceph_assert(diri); |
7c673cae | 3359 | CDir *dir = diri->get_or_open_dirfrag(mds->mdcache, df.frag); |
11fdf7f2 | 3360 | ceph_assert(dir); |
7c673cae | 3361 | |
9f95a23c | 3362 | dout(7) << *dir << dendl; |
7c673cae | 3363 | |
11fdf7f2 TL |
3364 | if (!dir->freeze_tree_state) { |
3365 | ceph_assert(dir->get_version() == 0); | |
3366 | dir->freeze_tree_state = import_root->freeze_tree_state; | |
3367 | } | |
3368 | ||
7c673cae | 3369 | // assimilate state |
11fdf7f2 | 3370 | dir->decode_import(blp, ls); |
7c673cae FG |
3371 | |
3372 | // adjust replica list | |
3373 | //assert(!dir->is_replica(oldauth)); // not true on failed export | |
3374 | dir->add_replica(oldauth, CDir::EXPORT_NONCE); | |
3375 | if (dir->is_replica(mds->get_nodeid())) | |
3376 | dir->remove_replica(mds->get_nodeid()); | |
3377 | ||
3378 | // add to journal entry | |
3379 | if (le) | |
3380 | le->metablob.add_import_dir(dir); | |
3381 | ||
3382 | int num_imported = 0; | |
3383 | ||
3384 | // take all waiters on this dir | |
3385 | // NOTE: a pass of imported data is guaranteed to get all of my waiters because | |
3386 | // a replica's presense in my cache implies/forces it's presense in authority's. | |
11fdf7f2 | 3387 | MDSContext::vec waiters; |
7c673cae | 3388 | dir->take_waiting(CDir::WAIT_ANY_MASK, waiters); |
11fdf7f2 TL |
3389 | for (auto c : waiters) |
3390 | dir->add_waiter(CDir::WAIT_UNFREEZE, c); // UNFREEZE will get kicked both on success or failure | |
7c673cae FG |
3391 | |
3392 | dout(15) << "doing contents" << dendl; | |
3393 | ||
3394 | // contents | |
3395 | __u32 nden; | |
11fdf7f2 | 3396 | decode(nden, blp); |
7c673cae FG |
3397 | |
3398 | for (; nden>0; nden--) { | |
3399 | num_imported++; | |
3400 | ||
3401 | // dentry | |
3402 | string dname; | |
3403 | snapid_t last; | |
11fdf7f2 TL |
3404 | decode(dname, blp); |
3405 | decode(last, blp); | |
7c673cae FG |
3406 | |
3407 | CDentry *dn = dir->lookup_exact_snap(dname, last); | |
3408 | if (!dn) | |
3409 | dn = dir->add_null_dentry(dname, 1, last); | |
3410 | ||
3411 | dn->decode_import(blp, ls); | |
3412 | ||
3413 | dn->add_replica(oldauth, CDentry::EXPORT_NONCE); | |
3414 | if (dn->is_replica(mds->get_nodeid())) | |
3415 | dn->remove_replica(mds->get_nodeid()); | |
3416 | ||
3417 | // dentry lock in unreadable state can block path traverse | |
3418 | if (dn->lock.get_state() != LOCK_SYNC) | |
3419 | mds->locker->try_eval(&dn->lock, NULL); | |
3420 | ||
9f95a23c | 3421 | dout(15) << " got " << *dn << dendl; |
7c673cae FG |
3422 | |
3423 | // points to... | |
3424 | char icode; | |
11fdf7f2 | 3425 | decode(icode, blp); |
7c673cae FG |
3426 | |
3427 | if (icode == 'N') { | |
3428 | // null dentry | |
11fdf7f2 | 3429 | ceph_assert(dn->get_linkage()->is_null()); |
7c673cae FG |
3430 | |
3431 | // fall thru | |
3432 | } | |
f67539c2 | 3433 | else if (icode == 'L' || icode == 'l') { |
7c673cae FG |
3434 | // remote link |
3435 | inodeno_t ino; | |
3436 | unsigned char d_type; | |
f67539c2 TL |
3437 | mempool::mds_co::string alternate_name; |
3438 | ||
3439 | CDentry::decode_remote(icode, ino, d_type, alternate_name, blp); | |
3440 | ||
7c673cae | 3441 | if (dn->get_linkage()->is_remote()) { |
11fdf7f2 | 3442 | ceph_assert(dn->get_linkage()->get_remote_ino() == ino); |
f67539c2 | 3443 | ceph_assert(dn->get_alternate_name() == alternate_name); |
7c673cae FG |
3444 | } else { |
3445 | dir->link_remote_inode(dn, ino, d_type); | |
f67539c2 | 3446 | dn->set_alternate_name(std::move(alternate_name)); |
7c673cae FG |
3447 | } |
3448 | } | |
f67539c2 | 3449 | else if (icode == 'I' || icode == 'i') { |
7c673cae | 3450 | // inode |
11fdf7f2 | 3451 | ceph_assert(le); |
f67539c2 TL |
3452 | if (icode == 'i') { |
3453 | DECODE_START(2, blp); | |
3454 | decode_import_inode(dn, blp, oldauth, ls, | |
3455 | peer_exports, updated_scatterlocks); | |
3456 | ceph_assert(!dn->is_projected()); | |
3457 | decode(dn->alternate_name, blp); | |
3458 | DECODE_FINISH(blp); | |
3459 | } else { | |
3460 | decode_import_inode(dn, blp, oldauth, ls, | |
3461 | peer_exports, updated_scatterlocks); | |
3462 | } | |
7c673cae FG |
3463 | } |
3464 | ||
3465 | // add dentry to journal entry | |
3466 | if (le) | |
3467 | le->metablob.add_import_dentry(dn); | |
3468 | } | |
3469 | ||
3470 | #ifdef MDS_VERIFY_FRAGSTAT | |
3471 | if (dir->is_complete()) | |
3472 | dir->verify_fragstat(); | |
3473 | #endif | |
3474 | ||
3475 | dir->inode->maybe_export_pin(); | |
3476 | ||
9f95a23c TL |
3477 | dout(7) << " done " << *dir << dendl; |
3478 | DECODE_FINISH(blp); | |
7c673cae FG |
3479 | } |
3480 | ||
3481 | ||
3482 | ||
3483 | ||
3484 | ||
3485 | // authority bystander | |
3486 | ||
9f95a23c | 3487 | void Migrator::handle_export_notify(const cref_t<MExportDirNotify> &m) |
7c673cae FG |
3488 | { |
3489 | if (!(mds->is_clientreplay() || mds->is_active() || mds->is_stopping())) { | |
7c673cae FG |
3490 | return; |
3491 | } | |
3492 | ||
f67539c2 | 3493 | CDir *dir = mdcache->get_dirfrag(m->get_dirfrag()); |
7c673cae FG |
3494 | |
3495 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
3496 | mds_authority_t old_auth = m->get_old_auth(); | |
3497 | mds_authority_t new_auth = m->get_new_auth(); | |
3498 | ||
3499 | if (!dir) { | |
9f95a23c | 3500 | dout(7) << old_auth << " -> " << new_auth |
7c673cae FG |
3501 | << " on missing dir " << m->get_dirfrag() << dendl; |
3502 | } else if (dir->authority() != old_auth) { | |
9f95a23c | 3503 | dout(7) << "old_auth was " << dir->authority() |
7c673cae FG |
3504 | << " != " << old_auth << " -> " << new_auth |
3505 | << " on " << *dir << dendl; | |
3506 | } else { | |
9f95a23c | 3507 | dout(7) << old_auth << " -> " << new_auth |
7c673cae FG |
3508 | << " on " << *dir << dendl; |
3509 | // adjust auth | |
3510 | set<CDir*> have; | |
f67539c2 TL |
3511 | mdcache->map_dirfrag_set(m->get_bounds(), have); |
3512 | mdcache->adjust_bounded_subtree_auth(dir, have, new_auth); | |
7c673cae FG |
3513 | |
3514 | // induce a merge? | |
f67539c2 | 3515 | mdcache->try_subtree_merge(dir); |
7c673cae FG |
3516 | } |
3517 | ||
3518 | // send ack | |
3519 | if (m->wants_ack()) { | |
9f95a23c | 3520 | mds->send_message_mds(make_message<MExportDirNotifyAck>(m->get_dirfrag(), m->get_tid(), m->get_new_auth()), from); |
7c673cae FG |
3521 | } else { |
3522 | // aborted. no ack. | |
9f95a23c | 3523 | dout(7) << "no ack requested" << dendl; |
7c673cae | 3524 | } |
7c673cae FG |
3525 | } |
3526 | ||
3527 | /** cap exports **/ | |
3528 | void Migrator::export_caps(CInode *in) | |
3529 | { | |
3530 | mds_rank_t dest = in->authority().first; | |
9f95a23c | 3531 | dout(7) << "to mds." << dest << " " << *in << dendl; |
7c673cae | 3532 | |
11fdf7f2 TL |
3533 | ceph_assert(in->is_any_caps()); |
3534 | ceph_assert(!in->is_auth()); | |
3535 | ceph_assert(!in->is_ambiguous_auth()); | |
3536 | ceph_assert(!in->state_test(CInode::STATE_EXPORTINGCAPS)); | |
7c673cae | 3537 | |
9f95a23c | 3538 | auto ex = make_message<MExportCaps>(); |
7c673cae FG |
3539 | ex->ino = in->ino(); |
3540 | ||
11fdf7f2 | 3541 | encode_export_inode_caps(in, false, ex->cap_bl, ex->client_map, ex->client_metadata_map); |
7c673cae FG |
3542 | |
3543 | mds->send_message_mds(ex, dest); | |
3544 | } | |
3545 | ||
9f95a23c | 3546 | void Migrator::handle_export_caps_ack(const cref_t<MExportCapsAck> &ack) |
1adf2230 AA |
3547 | { |
3548 | mds_rank_t from = ack->get_source().num(); | |
f67539c2 | 3549 | CInode *in = mdcache->get_inode(ack->ino); |
1adf2230 | 3550 | if (in) { |
11fdf7f2 | 3551 | ceph_assert(!in->is_auth()); |
1adf2230 | 3552 | |
9f95a23c | 3553 | dout(10) << *ack << " from " |
1adf2230 AA |
3554 | << ack->get_source() << " on " << *in << dendl; |
3555 | ||
3556 | map<client_t,Capability::Import> imported_caps; | |
3557 | map<client_t,uint64_t> caps_ids; | |
11fdf7f2 TL |
3558 | auto blp = ack->cap_bl.cbegin(); |
3559 | decode(imported_caps, blp); | |
3560 | decode(caps_ids, blp); | |
1adf2230 AA |
3561 | |
3562 | for (auto& it : imported_caps) { | |
3563 | Capability *cap = in->get_client_cap(it.first); | |
3564 | if (!cap || cap->get_cap_id() != caps_ids.at(it.first)) | |
3565 | continue; | |
3566 | ||
9f95a23c | 3567 | dout(7) << " telling client." << it.first |
1adf2230 | 3568 | << " exported caps on " << *in << dendl; |
9f95a23c | 3569 | auto m = make_message<MClientCaps>(CEPH_CAP_OP_EXPORT, in->ino(), 0, |
1adf2230 AA |
3570 | cap->get_cap_id(), cap->get_mseq(), |
3571 | mds->get_osd_epoch_barrier()); | |
3572 | m->set_cap_peer(it.second.cap_id, it.second.issue_seq, it.second.mseq, from, 0); | |
3573 | mds->send_message_client_counted(m, it.first); | |
3574 | ||
3575 | in->remove_client_cap(it.first); | |
3576 | } | |
3577 | ||
3578 | mds->locker->request_inode_file_caps(in); | |
3579 | mds->locker->try_eval(in, CEPH_CAP_LOCKS); | |
3580 | } | |
1adf2230 AA |
3581 | } |
3582 | ||
9f95a23c | 3583 | void Migrator::handle_gather_caps(const cref_t<MGatherCaps> &m) |
7c673cae | 3584 | { |
f67539c2 | 3585 | CInode *in = mdcache->get_inode(m->ino); |
7c673cae | 3586 | if (!in) |
11fdf7f2 | 3587 | return; |
7c673cae | 3588 | |
9f95a23c | 3589 | dout(10) << *m << " from " << m->get_source() |
1adf2230 AA |
3590 | << " on " << *in << dendl; |
3591 | ||
7c673cae FG |
3592 | if (in->is_any_caps() && |
3593 | !in->is_auth() && | |
3594 | !in->is_ambiguous_auth() && | |
3595 | !in->state_test(CInode::STATE_EXPORTINGCAPS)) | |
3596 | export_caps(in); | |
7c673cae FG |
3597 | } |
3598 | ||
3599 | class C_M_LoggedImportCaps : public MigratorLogContext { | |
3600 | CInode *in; | |
3601 | mds_rank_t from; | |
3602 | public: | |
28e407b8 | 3603 | map<client_t,pair<Session*,uint64_t> > imported_session_map; |
7c673cae | 3604 | map<CInode*, map<client_t,Capability::Export> > peer_exports; |
7c673cae FG |
3605 | |
3606 | C_M_LoggedImportCaps(Migrator *m, CInode *i, mds_rank_t f) : MigratorLogContext(m), in(i), from(f) {} | |
3607 | void finish(int r) override { | |
28e407b8 | 3608 | mig->logged_import_caps(in, from, imported_session_map, peer_exports); |
7c673cae FG |
3609 | } |
3610 | }; | |
3611 | ||
9f95a23c | 3612 | void Migrator::handle_export_caps(const cref_t<MExportCaps> &ex) |
7c673cae | 3613 | { |
9f95a23c | 3614 | dout(10) << *ex << " from " << ex->get_source() << dendl; |
f67539c2 | 3615 | CInode *in = mdcache->get_inode(ex->ino); |
7c673cae | 3616 | |
11fdf7f2 TL |
3617 | ceph_assert(in); |
3618 | ceph_assert(in->is_auth()); | |
7c673cae FG |
3619 | |
3620 | // FIXME | |
28e407b8 | 3621 | if (!in->can_auth_pin()) { |
7c673cae | 3622 | return; |
28e407b8 AA |
3623 | } |
3624 | ||
181888fb | 3625 | in->auth_pin(this); |
7c673cae | 3626 | |
11fdf7f2 TL |
3627 | map<client_t,entity_inst_t> client_map{ex->client_map}; |
3628 | map<client_t,client_metadata_t> client_metadata_map{ex->client_metadata_map}; | |
28e407b8 | 3629 | |
7c673cae FG |
3630 | C_M_LoggedImportCaps *finish = new C_M_LoggedImportCaps( |
3631 | this, in, mds_rank_t(ex->get_source().num())); | |
7c673cae | 3632 | |
11fdf7f2 | 3633 | version_t pv = mds->server->prepare_force_open_sessions(client_map, client_metadata_map, |
28e407b8 | 3634 | finish->imported_session_map); |
7c673cae | 3635 | // decode new caps |
11fdf7f2 | 3636 | auto blp = ex->cap_bl.cbegin(); |
7c673cae | 3637 | decode_import_inode_caps(in, false, blp, finish->peer_exports); |
11fdf7f2 | 3638 | ceph_assert(!finish->peer_exports.empty()); // thus, inode is pinned. |
7c673cae FG |
3639 | |
3640 | // journal open client sessions | |
11fdf7f2 TL |
3641 | ESessions *le = new ESessions(pv, std::move(client_map), |
3642 | std::move(client_metadata_map)); | |
7c673cae FG |
3643 | mds->mdlog->start_submit_entry(le, finish); |
3644 | mds->mdlog->flush(); | |
7c673cae FG |
3645 | } |
3646 | ||
3647 | ||
3648 | void Migrator::logged_import_caps(CInode *in, | |
3649 | mds_rank_t from, | |
28e407b8 AA |
3650 | map<client_t,pair<Session*,uint64_t> >& imported_session_map, |
3651 | map<CInode*, map<client_t,Capability::Export> >& peer_exports) | |
7c673cae | 3652 | { |
9f95a23c | 3653 | dout(10) << *in << dendl; |
7c673cae | 3654 | // see export_go() vs export_go_synced() |
11fdf7f2 | 3655 | ceph_assert(in->is_auth()); |
7c673cae FG |
3656 | |
3657 | // force open client sessions and finish cap import | |
28e407b8 | 3658 | mds->server->finish_force_open_sessions(imported_session_map); |
7c673cae | 3659 | |
28e407b8 | 3660 | auto it = peer_exports.find(in); |
11fdf7f2 | 3661 | ceph_assert(it != peer_exports.end()); |
28e407b8 | 3662 | |
7c673cae | 3663 | // clients will release caps from the exporter when they receive the cap import message. |
1adf2230 | 3664 | map<client_t,Capability::Import> imported_caps; |
28e407b8 | 3665 | finish_import_inode_caps(in, from, false, imported_session_map, it->second, imported_caps); |
7c673cae | 3666 | mds->locker->eval(in, CEPH_CAP_LOCKS, true); |
1adf2230 AA |
3667 | |
3668 | if (!imported_caps.empty()) { | |
9f95a23c | 3669 | auto ack = make_message<MExportCapsAck>(in->ino()); |
1adf2230 AA |
3670 | map<client_t,uint64_t> peer_caps_ids; |
3671 | for (auto &p : imported_caps ) | |
3672 | peer_caps_ids[p.first] = it->second.at(p.first).cap_id; | |
3673 | ||
11fdf7f2 TL |
3674 | encode(imported_caps, ack->cap_bl); |
3675 | encode(peer_caps_ids, ack->cap_bl); | |
1adf2230 AA |
3676 | mds->send_message_mds(ack, from); |
3677 | } | |
3678 | ||
181888fb | 3679 | in->auth_unpin(this); |
7c673cae | 3680 | } |
28e407b8 | 3681 | |
f67539c2 | 3682 | Migrator::Migrator(MDSRank *m, MDCache *c) : mds(m), mdcache(c) { |
11fdf7f2 TL |
3683 | max_export_size = g_conf().get_val<Option::size_t>("mds_max_export_size"); |
3684 | inject_session_race = g_conf().get_val<bool>("mds_inject_migrator_session_race"); | |
91327a77 AA |
3685 | } |
3686 | ||
92f5a8d4 | 3687 | void Migrator::handle_conf_change(const std::set<std::string>& changed, const MDSMap& mds_map) |
28e407b8 | 3688 | { |
91327a77 | 3689 | if (changed.count("mds_max_export_size")) |
11fdf7f2 | 3690 | max_export_size = g_conf().get_val<Option::size_t>("mds_max_export_size"); |
28e407b8 | 3691 | if (changed.count("mds_inject_migrator_session_race")) { |
92f5a8d4 | 3692 | inject_session_race = g_conf().get_val<bool>("mds_inject_migrator_session_race"); |
28e407b8 AA |
3693 | dout(0) << "mds_inject_migrator_session_race is " << inject_session_race << dendl; |
3694 | } | |
3695 | } |