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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 | ||
16 | #include "MDSRank.h" | |
17 | #include "MDCache.h" | |
18 | #include "Locker.h" | |
19 | #include "CInode.h" | |
20 | #include "CDir.h" | |
21 | #include "CDentry.h" | |
22 | #include "Mutation.h" | |
23 | #include "MDSContext.h" | |
24 | ||
25 | #include "MDLog.h" | |
26 | #include "MDSMap.h" | |
27 | ||
28 | #include "events/EUpdate.h" | |
29 | #include "events/EOpen.h" | |
30 | ||
31 | #include "msg/Messenger.h" | |
32 | #include "osdc/Objecter.h" | |
33 | ||
34 | #include "messages/MInodeFileCaps.h" | |
35 | #include "messages/MLock.h" | |
36 | #include "messages/MClientLease.h" | |
37 | #include "messages/MClientReply.h" | |
38 | #include "messages/MClientCaps.h" | |
39 | #include "messages/MClientCapRelease.h" | |
40 | ||
41 | #include "messages/MMDSSlaveRequest.h" | |
42 | ||
43 | #include <errno.h> | |
44 | ||
45 | #include "common/config.h" | |
46 | ||
47 | ||
48 | #define dout_subsys ceph_subsys_mds | |
49 | #undef dout_prefix | |
50 | #define dout_context g_ceph_context | |
51 | #define dout_prefix _prefix(_dout, mds) | |
52 | static ostream& _prefix(std::ostream *_dout, MDSRank *mds) { | |
53 | return *_dout << "mds." << mds->get_nodeid() << ".locker "; | |
54 | } | |
55 | ||
56 | ||
57 | class LockerContext : public MDSInternalContextBase { | |
58 | protected: | |
59 | Locker *locker; | |
60 | MDSRank *get_mds() override | |
61 | { | |
62 | return locker->mds; | |
63 | } | |
64 | ||
65 | public: | |
66 | explicit LockerContext(Locker *locker_) : locker(locker_) { | |
67 | assert(locker != NULL); | |
68 | } | |
69 | }; | |
70 | ||
71 | class LockerLogContext : public MDSLogContextBase { | |
72 | protected: | |
73 | Locker *locker; | |
74 | MDSRank *get_mds() override | |
75 | { | |
76 | return locker->mds; | |
77 | } | |
78 | ||
79 | public: | |
80 | explicit LockerLogContext(Locker *locker_) : locker(locker_) { | |
81 | assert(locker != NULL); | |
82 | } | |
83 | }; | |
84 | ||
85 | /* This function DOES put the passed message before returning */ | |
86 | void Locker::dispatch(Message *m) | |
87 | { | |
88 | ||
89 | switch (m->get_type()) { | |
90 | ||
91 | // inter-mds locking | |
92 | case MSG_MDS_LOCK: | |
93 | handle_lock(static_cast<MLock*>(m)); | |
94 | break; | |
95 | // inter-mds caps | |
96 | case MSG_MDS_INODEFILECAPS: | |
97 | handle_inode_file_caps(static_cast<MInodeFileCaps*>(m)); | |
98 | break; | |
99 | ||
100 | // client sync | |
101 | case CEPH_MSG_CLIENT_CAPS: | |
102 | handle_client_caps(static_cast<MClientCaps*>(m)); | |
103 | ||
104 | break; | |
105 | case CEPH_MSG_CLIENT_CAPRELEASE: | |
106 | handle_client_cap_release(static_cast<MClientCapRelease*>(m)); | |
107 | break; | |
108 | case CEPH_MSG_CLIENT_LEASE: | |
109 | handle_client_lease(static_cast<MClientLease*>(m)); | |
110 | break; | |
111 | ||
112 | default: | |
113 | derr << "locker unknown message " << m->get_type() << dendl; | |
114 | assert(0 == "locker unknown message"); | |
115 | } | |
116 | } | |
117 | ||
118 | void Locker::tick() | |
119 | { | |
120 | scatter_tick(); | |
121 | caps_tick(); | |
122 | } | |
123 | ||
124 | /* | |
125 | * locks vs rejoin | |
126 | * | |
127 | * | |
128 | * | |
129 | */ | |
130 | ||
131 | void Locker::send_lock_message(SimpleLock *lock, int msg) | |
132 | { | |
133 | for (compact_map<mds_rank_t,unsigned>::iterator it = lock->get_parent()->replicas_begin(); | |
134 | it != lock->get_parent()->replicas_end(); | |
135 | ++it) { | |
136 | if (mds->is_cluster_degraded() && | |
137 | mds->mdsmap->get_state(it->first) < MDSMap::STATE_REJOIN) | |
138 | continue; | |
139 | MLock *m = new MLock(lock, msg, mds->get_nodeid()); | |
140 | mds->send_message_mds(m, it->first); | |
141 | } | |
142 | } | |
143 | ||
144 | void Locker::send_lock_message(SimpleLock *lock, int msg, const bufferlist &data) | |
145 | { | |
146 | for (compact_map<mds_rank_t,unsigned>::iterator it = lock->get_parent()->replicas_begin(); | |
147 | it != lock->get_parent()->replicas_end(); | |
148 | ++it) { | |
149 | if (mds->is_cluster_degraded() && | |
150 | mds->mdsmap->get_state(it->first) < MDSMap::STATE_REJOIN) | |
151 | continue; | |
152 | MLock *m = new MLock(lock, msg, mds->get_nodeid()); | |
153 | m->set_data(data); | |
154 | mds->send_message_mds(m, it->first); | |
155 | } | |
156 | } | |
157 | ||
158 | ||
159 | ||
160 | ||
161 | void Locker::include_snap_rdlocks(set<SimpleLock*>& rdlocks, CInode *in) | |
162 | { | |
163 | // rdlock ancestor snaps | |
164 | CInode *t = in; | |
165 | rdlocks.insert(&in->snaplock); | |
166 | while (t->get_projected_parent_dn()) { | |
167 | t = t->get_projected_parent_dn()->get_dir()->get_inode(); | |
168 | rdlocks.insert(&t->snaplock); | |
169 | } | |
170 | } | |
171 | ||
172 | void Locker::include_snap_rdlocks_wlayout(set<SimpleLock*>& rdlocks, CInode *in, | |
173 | file_layout_t **layout) | |
174 | { | |
175 | //rdlock ancestor snaps | |
176 | CInode *t = in; | |
177 | rdlocks.insert(&in->snaplock); | |
178 | rdlocks.insert(&in->policylock); | |
179 | bool found_layout = false; | |
180 | while (t) { | |
181 | rdlocks.insert(&t->snaplock); | |
182 | if (!found_layout) { | |
183 | rdlocks.insert(&t->policylock); | |
184 | if (t->get_projected_inode()->has_layout()) { | |
185 | *layout = &t->get_projected_inode()->layout; | |
186 | found_layout = true; | |
187 | } | |
188 | } | |
189 | if (t->get_projected_parent_dn() && | |
190 | t->get_projected_parent_dn()->get_dir()) | |
191 | t = t->get_projected_parent_dn()->get_dir()->get_inode(); | |
192 | else t = NULL; | |
193 | } | |
194 | } | |
195 | ||
196 | struct MarkEventOnDestruct { | |
197 | MDRequestRef& mdr; | |
198 | const char* message; | |
199 | bool mark_event; | |
200 | MarkEventOnDestruct(MDRequestRef& _mdr, | |
201 | const char *_message) : mdr(_mdr), | |
202 | message(_message), | |
203 | mark_event(true) {} | |
204 | ~MarkEventOnDestruct() { | |
205 | if (mark_event) | |
206 | mdr->mark_event(message); | |
207 | } | |
208 | }; | |
209 | ||
210 | /* If this function returns false, the mdr has been placed | |
211 | * on the appropriate wait list */ | |
212 | bool Locker::acquire_locks(MDRequestRef& mdr, | |
213 | set<SimpleLock*> &rdlocks, | |
214 | set<SimpleLock*> &wrlocks, | |
215 | set<SimpleLock*> &xlocks, | |
216 | map<SimpleLock*,mds_rank_t> *remote_wrlocks, | |
217 | CInode *auth_pin_freeze, | |
218 | bool auth_pin_nonblock) | |
219 | { | |
220 | if (mdr->done_locking && | |
221 | !mdr->is_slave()) { // not on slaves! master requests locks piecemeal. | |
222 | dout(10) << "acquire_locks " << *mdr << " - done locking" << dendl; | |
223 | return true; // at least we had better be! | |
224 | } | |
225 | dout(10) << "acquire_locks " << *mdr << dendl; | |
226 | ||
227 | MarkEventOnDestruct marker(mdr, "failed to acquire_locks"); | |
228 | ||
229 | client_t client = mdr->get_client(); | |
230 | ||
231 | set<SimpleLock*, SimpleLock::ptr_lt> sorted; // sort everything we will lock | |
232 | set<MDSCacheObject*> mustpin; // items to authpin | |
233 | ||
234 | // xlocks | |
235 | for (set<SimpleLock*>::iterator p = xlocks.begin(); p != xlocks.end(); ++p) { | |
236 | dout(20) << " must xlock " << **p << " " << *(*p)->get_parent() << dendl; | |
237 | sorted.insert(*p); | |
238 | mustpin.insert((*p)->get_parent()); | |
239 | ||
240 | // augment xlock with a versionlock? | |
241 | if ((*p)->get_type() == CEPH_LOCK_DN) { | |
242 | CDentry *dn = (CDentry*)(*p)->get_parent(); | |
243 | if (!dn->is_auth()) | |
244 | continue; | |
245 | ||
246 | if (xlocks.count(&dn->versionlock)) | |
247 | continue; // we're xlocking the versionlock too; don't wrlock it! | |
248 | ||
249 | if (mdr->is_master()) { | |
250 | // master. wrlock versionlock so we can pipeline dentry updates to journal. | |
251 | wrlocks.insert(&dn->versionlock); | |
252 | } else { | |
253 | // slave. exclusively lock the dentry version (i.e. block other journal updates). | |
254 | // this makes rollback safe. | |
255 | xlocks.insert(&dn->versionlock); | |
256 | sorted.insert(&dn->versionlock); | |
257 | } | |
258 | } | |
259 | if ((*p)->get_type() > CEPH_LOCK_IVERSION) { | |
260 | // inode version lock? | |
261 | CInode *in = (CInode*)(*p)->get_parent(); | |
262 | if (!in->is_auth()) | |
263 | continue; | |
264 | if (mdr->is_master()) { | |
265 | // master. wrlock versionlock so we can pipeline inode updates to journal. | |
266 | wrlocks.insert(&in->versionlock); | |
267 | } else { | |
268 | // slave. exclusively lock the inode version (i.e. block other journal updates). | |
269 | // this makes rollback safe. | |
270 | xlocks.insert(&in->versionlock); | |
271 | sorted.insert(&in->versionlock); | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
276 | // wrlocks | |
277 | for (set<SimpleLock*>::iterator p = wrlocks.begin(); p != wrlocks.end(); ++p) { | |
278 | MDSCacheObject *object = (*p)->get_parent(); | |
279 | dout(20) << " must wrlock " << **p << " " << *object << dendl; | |
280 | sorted.insert(*p); | |
281 | if (object->is_auth()) | |
282 | mustpin.insert(object); | |
283 | else if (!object->is_auth() && | |
284 | !(*p)->can_wrlock(client) && // we might have to request a scatter | |
285 | !mdr->is_slave()) { // if we are slave (remote_wrlock), the master already authpinned | |
286 | dout(15) << " will also auth_pin " << *object | |
287 | << " in case we need to request a scatter" << dendl; | |
288 | mustpin.insert(object); | |
289 | } | |
290 | } | |
291 | ||
292 | // remote_wrlocks | |
293 | if (remote_wrlocks) { | |
294 | for (map<SimpleLock*,mds_rank_t>::iterator p = remote_wrlocks->begin(); p != remote_wrlocks->end(); ++p) { | |
295 | MDSCacheObject *object = p->first->get_parent(); | |
296 | dout(20) << " must remote_wrlock on mds." << p->second << " " | |
297 | << *p->first << " " << *object << dendl; | |
298 | sorted.insert(p->first); | |
299 | mustpin.insert(object); | |
300 | } | |
301 | } | |
302 | ||
303 | // rdlocks | |
304 | for (set<SimpleLock*>::iterator p = rdlocks.begin(); | |
305 | p != rdlocks.end(); | |
306 | ++p) { | |
307 | MDSCacheObject *object = (*p)->get_parent(); | |
308 | dout(20) << " must rdlock " << **p << " " << *object << dendl; | |
309 | sorted.insert(*p); | |
310 | if (object->is_auth()) | |
311 | mustpin.insert(object); | |
312 | else if (!object->is_auth() && | |
313 | !(*p)->can_rdlock(client)) { // we might have to request an rdlock | |
314 | dout(15) << " will also auth_pin " << *object | |
315 | << " in case we need to request a rdlock" << dendl; | |
316 | mustpin.insert(object); | |
317 | } | |
318 | } | |
319 | ||
320 | ||
321 | // AUTH PINS | |
322 | map<mds_rank_t, set<MDSCacheObject*> > mustpin_remote; // mds -> (object set) | |
323 | ||
324 | // can i auth pin them all now? | |
325 | marker.message = "failed to authpin local pins"; | |
326 | for (set<MDSCacheObject*>::iterator p = mustpin.begin(); | |
327 | p != mustpin.end(); | |
328 | ++p) { | |
329 | MDSCacheObject *object = *p; | |
330 | ||
331 | dout(10) << " must authpin " << *object << dendl; | |
332 | ||
333 | if (mdr->is_auth_pinned(object)) { | |
334 | if (object != (MDSCacheObject*)auth_pin_freeze) | |
335 | continue; | |
336 | if (mdr->more()->is_remote_frozen_authpin) { | |
337 | if (mdr->more()->rename_inode == auth_pin_freeze) | |
338 | continue; | |
339 | // unfreeze auth pin for the wrong inode | |
340 | mustpin_remote[mdr->more()->rename_inode->authority().first].size(); | |
341 | } | |
342 | } | |
343 | ||
344 | if (!object->is_auth()) { | |
345 | if (!mdr->locks.empty()) | |
346 | drop_locks(mdr.get()); | |
347 | if (object->is_ambiguous_auth()) { | |
348 | // wait | |
349 | dout(10) << " ambiguous auth, waiting to authpin " << *object << dendl; | |
350 | object->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_MDS_RetryRequest(mdcache, mdr)); | |
351 | mdr->drop_local_auth_pins(); | |
352 | return false; | |
353 | } | |
354 | mustpin_remote[object->authority().first].insert(object); | |
355 | continue; | |
356 | } | |
357 | if (!object->can_auth_pin()) { | |
358 | // wait | |
359 | drop_locks(mdr.get()); | |
360 | mdr->drop_local_auth_pins(); | |
361 | if (auth_pin_nonblock) { | |
362 | dout(10) << " can't auth_pin (freezing?) " << *object << ", nonblocking" << dendl; | |
363 | mdr->aborted = true; | |
364 | return false; | |
365 | } | |
366 | dout(10) << " can't auth_pin (freezing?), waiting to authpin " << *object << dendl; | |
367 | object->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); | |
224ce89b WB |
368 | |
369 | if (!mdr->remote_auth_pins.empty()) | |
370 | notify_freeze_waiter(object); | |
371 | ||
7c673cae FG |
372 | return false; |
373 | } | |
374 | } | |
375 | ||
376 | // ok, grab local auth pins | |
377 | for (set<MDSCacheObject*>::iterator p = mustpin.begin(); | |
378 | p != mustpin.end(); | |
379 | ++p) { | |
380 | MDSCacheObject *object = *p; | |
381 | if (mdr->is_auth_pinned(object)) { | |
382 | dout(10) << " already auth_pinned " << *object << dendl; | |
383 | } else if (object->is_auth()) { | |
384 | dout(10) << " auth_pinning " << *object << dendl; | |
385 | mdr->auth_pin(object); | |
386 | } | |
387 | } | |
388 | ||
389 | // request remote auth_pins | |
390 | if (!mustpin_remote.empty()) { | |
391 | marker.message = "requesting remote authpins"; | |
392 | for (map<MDSCacheObject*,mds_rank_t>::iterator p = mdr->remote_auth_pins.begin(); | |
393 | p != mdr->remote_auth_pins.end(); | |
394 | ++p) { | |
395 | if (mustpin.count(p->first)) { | |
396 | assert(p->second == p->first->authority().first); | |
397 | map<mds_rank_t, set<MDSCacheObject*> >::iterator q = mustpin_remote.find(p->second); | |
398 | if (q != mustpin_remote.end()) | |
399 | q->second.insert(p->first); | |
400 | } | |
401 | } | |
402 | for (map<mds_rank_t, set<MDSCacheObject*> >::iterator p = mustpin_remote.begin(); | |
403 | p != mustpin_remote.end(); | |
404 | ++p) { | |
405 | dout(10) << "requesting remote auth_pins from mds." << p->first << dendl; | |
406 | ||
407 | // wait for active auth | |
408 | if (mds->is_cluster_degraded() && | |
409 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(p->first)) { | |
410 | dout(10) << " mds." << p->first << " is not active" << dendl; | |
411 | if (mdr->more()->waiting_on_slave.empty()) | |
412 | mds->wait_for_active_peer(p->first, new C_MDS_RetryRequest(mdcache, mdr)); | |
413 | return false; | |
414 | } | |
415 | ||
416 | MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
417 | MMDSSlaveRequest::OP_AUTHPIN); | |
418 | for (set<MDSCacheObject*>::iterator q = p->second.begin(); | |
419 | q != p->second.end(); | |
420 | ++q) { | |
421 | dout(10) << " req remote auth_pin of " << **q << dendl; | |
422 | MDSCacheObjectInfo info; | |
423 | (*q)->set_object_info(info); | |
424 | req->get_authpins().push_back(info); | |
425 | if (*q == auth_pin_freeze) | |
426 | (*q)->set_object_info(req->get_authpin_freeze()); | |
427 | mdr->pin(*q); | |
428 | } | |
429 | if (auth_pin_nonblock) | |
430 | req->mark_nonblock(); | |
431 | mds->send_message_mds(req, p->first); | |
432 | ||
433 | // put in waiting list | |
434 | assert(mdr->more()->waiting_on_slave.count(p->first) == 0); | |
435 | mdr->more()->waiting_on_slave.insert(p->first); | |
436 | } | |
437 | return false; | |
438 | } | |
439 | ||
440 | // caps i'll need to issue | |
441 | set<CInode*> issue_set; | |
442 | bool result = false; | |
443 | ||
444 | // acquire locks. | |
445 | // make sure they match currently acquired locks. | |
446 | set<SimpleLock*, SimpleLock::ptr_lt>::iterator existing = mdr->locks.begin(); | |
447 | for (set<SimpleLock*, SimpleLock::ptr_lt>::iterator p = sorted.begin(); | |
448 | p != sorted.end(); | |
449 | ++p) { | |
450 | bool need_wrlock = !!wrlocks.count(*p); | |
451 | bool need_remote_wrlock = !!(remote_wrlocks && remote_wrlocks->count(*p)); | |
452 | ||
453 | // already locked? | |
454 | if (existing != mdr->locks.end() && *existing == *p) { | |
455 | // right kind? | |
456 | SimpleLock *have = *existing; | |
457 | ++existing; | |
458 | if (xlocks.count(have) && mdr->xlocks.count(have)) { | |
459 | dout(10) << " already xlocked " << *have << " " << *have->get_parent() << dendl; | |
460 | continue; | |
461 | } | |
462 | if (mdr->remote_wrlocks.count(have)) { | |
463 | if (!need_remote_wrlock || | |
464 | mdr->remote_wrlocks[have] != (*remote_wrlocks)[have]) { | |
465 | dout(10) << " unlocking remote_wrlock on wrong mds." << mdr->remote_wrlocks[have] | |
466 | << " " << *have << " " << *have->get_parent() << dendl; | |
467 | remote_wrlock_finish(have, mdr->remote_wrlocks[have], mdr.get()); | |
468 | } | |
469 | } | |
470 | if (need_wrlock || need_remote_wrlock) { | |
471 | if (need_wrlock == !!mdr->wrlocks.count(have) && | |
472 | need_remote_wrlock == !!mdr->remote_wrlocks.count(have)) { | |
473 | if (need_wrlock) | |
474 | dout(10) << " already wrlocked " << *have << " " << *have->get_parent() << dendl; | |
475 | if (need_remote_wrlock) | |
476 | dout(10) << " already remote_wrlocked " << *have << " " << *have->get_parent() << dendl; | |
477 | continue; | |
478 | } | |
479 | } | |
480 | if (rdlocks.count(have) && mdr->rdlocks.count(have)) { | |
481 | dout(10) << " already rdlocked " << *have << " " << *have->get_parent() << dendl; | |
482 | continue; | |
483 | } | |
484 | } | |
485 | ||
486 | // hose any stray locks | |
487 | if (existing != mdr->locks.end() && *existing == *p) { | |
488 | assert(need_wrlock || need_remote_wrlock); | |
489 | SimpleLock *lock = *existing; | |
490 | if (mdr->wrlocks.count(lock)) { | |
491 | if (!need_wrlock) | |
492 | dout(10) << " unlocking extra " << *lock << " " << *lock->get_parent() << dendl; | |
493 | else if (need_remote_wrlock) // acquire remote_wrlock first | |
494 | dout(10) << " unlocking out-of-order " << *lock << " " << *lock->get_parent() << dendl; | |
495 | bool need_issue = false; | |
496 | wrlock_finish(lock, mdr.get(), &need_issue); | |
497 | if (need_issue) | |
498 | issue_set.insert(static_cast<CInode*>(lock->get_parent())); | |
499 | } | |
500 | ++existing; | |
501 | } | |
502 | while (existing != mdr->locks.end()) { | |
503 | SimpleLock *stray = *existing; | |
504 | ++existing; | |
505 | dout(10) << " unlocking out-of-order " << *stray << " " << *stray->get_parent() << dendl; | |
506 | bool need_issue = false; | |
507 | if (mdr->xlocks.count(stray)) { | |
508 | xlock_finish(stray, mdr.get(), &need_issue); | |
509 | } else if (mdr->rdlocks.count(stray)) { | |
510 | rdlock_finish(stray, mdr.get(), &need_issue); | |
511 | } else { | |
512 | // may have acquired both wrlock and remore wrlock | |
513 | if (mdr->wrlocks.count(stray)) | |
514 | wrlock_finish(stray, mdr.get(), &need_issue); | |
515 | if (mdr->remote_wrlocks.count(stray)) | |
516 | remote_wrlock_finish(stray, mdr->remote_wrlocks[stray], mdr.get()); | |
517 | } | |
518 | if (need_issue) | |
519 | issue_set.insert(static_cast<CInode*>(stray->get_parent())); | |
520 | } | |
521 | ||
522 | // lock | |
523 | if (mdr->locking && *p != mdr->locking) { | |
524 | cancel_locking(mdr.get(), &issue_set); | |
525 | } | |
526 | if (xlocks.count(*p)) { | |
527 | marker.message = "failed to xlock, waiting"; | |
528 | if (!xlock_start(*p, mdr)) | |
529 | goto out; | |
530 | dout(10) << " got xlock on " << **p << " " << *(*p)->get_parent() << dendl; | |
531 | } else if (need_wrlock || need_remote_wrlock) { | |
532 | if (need_remote_wrlock && !mdr->remote_wrlocks.count(*p)) { | |
533 | marker.message = "waiting for remote wrlocks"; | |
534 | remote_wrlock_start(*p, (*remote_wrlocks)[*p], mdr); | |
535 | goto out; | |
536 | } | |
537 | if (need_wrlock && !mdr->wrlocks.count(*p)) { | |
538 | marker.message = "failed to wrlock, waiting"; | |
539 | if (need_remote_wrlock && !(*p)->can_wrlock(mdr->get_client())) { | |
540 | marker.message = "failed to wrlock, dropping remote wrlock and waiting"; | |
541 | // can't take the wrlock because the scatter lock is gathering. need to | |
542 | // release the remote wrlock, so that the gathering process can finish. | |
543 | remote_wrlock_finish(*p, mdr->remote_wrlocks[*p], mdr.get()); | |
544 | remote_wrlock_start(*p, (*remote_wrlocks)[*p], mdr); | |
545 | goto out; | |
546 | } | |
547 | // nowait if we have already gotten remote wrlock | |
548 | if (!wrlock_start(*p, mdr, need_remote_wrlock)) | |
549 | goto out; | |
550 | dout(10) << " got wrlock on " << **p << " " << *(*p)->get_parent() << dendl; | |
551 | } | |
552 | } else { | |
553 | assert(mdr->is_master()); | |
554 | if ((*p)->is_scatterlock()) { | |
555 | ScatterLock *slock = static_cast<ScatterLock *>(*p); | |
556 | if (slock->is_rejoin_mix()) { | |
557 | // If there is a recovering mds who replcated an object when it failed | |
558 | // and scatterlock in the object was in MIX state, It's possible that | |
559 | // the recovering mds needs to take wrlock on the scatterlock when it | |
560 | // replays unsafe requests. So this mds should delay taking rdlock on | |
561 | // the scatterlock until the recovering mds finishes replaying unsafe. | |
562 | // Otherwise unsafe requests may get replayed after current request. | |
563 | // | |
564 | // For example: | |
565 | // The recovering mds is auth mds of a dirfrag, this mds is auth mds | |
566 | // of correspinding inode. when 'rm -rf' the direcotry, this mds should | |
567 | // delay the rmdir request until the recovering mds has replayed unlink | |
568 | // requests. | |
569 | if (mds->is_cluster_degraded()) { | |
570 | if (!mdr->is_replay()) { | |
571 | drop_locks(mdr.get()); | |
572 | mds->wait_for_cluster_recovered(new C_MDS_RetryRequest(mdcache, mdr)); | |
573 | dout(10) << " rejoin mix scatterlock " << *slock << " " << *(*p)->get_parent() | |
574 | << ", waiting for cluster recovered" << dendl; | |
575 | marker.message = "rejoin mix scatterlock, waiting for cluster recovered"; | |
576 | return false; | |
577 | } | |
578 | } else { | |
579 | slock->clear_rejoin_mix(); | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | marker.message = "failed to rdlock, waiting"; | |
585 | if (!rdlock_start(*p, mdr)) | |
586 | goto out; | |
587 | dout(10) << " got rdlock on " << **p << " " << *(*p)->get_parent() << dendl; | |
588 | } | |
589 | } | |
590 | ||
591 | // any extra unneeded locks? | |
592 | while (existing != mdr->locks.end()) { | |
593 | SimpleLock *stray = *existing; | |
594 | ++existing; | |
595 | dout(10) << " unlocking extra " << *stray << " " << *stray->get_parent() << dendl; | |
596 | bool need_issue = false; | |
597 | if (mdr->xlocks.count(stray)) { | |
598 | xlock_finish(stray, mdr.get(), &need_issue); | |
599 | } else if (mdr->rdlocks.count(stray)) { | |
600 | rdlock_finish(stray, mdr.get(), &need_issue); | |
601 | } else { | |
602 | // may have acquired both wrlock and remore wrlock | |
603 | if (mdr->wrlocks.count(stray)) | |
604 | wrlock_finish(stray, mdr.get(), &need_issue); | |
605 | if (mdr->remote_wrlocks.count(stray)) | |
606 | remote_wrlock_finish(stray, mdr->remote_wrlocks[stray], mdr.get()); | |
607 | } | |
608 | if (need_issue) | |
609 | issue_set.insert(static_cast<CInode*>(stray->get_parent())); | |
610 | } | |
611 | ||
612 | mdr->done_locking = true; | |
613 | mdr->set_mds_stamp(ceph_clock_now()); | |
614 | result = true; | |
615 | marker.message = "acquired locks"; | |
616 | ||
617 | out: | |
618 | issue_caps_set(issue_set); | |
619 | return result; | |
620 | } | |
621 | ||
224ce89b WB |
622 | void Locker::notify_freeze_waiter(MDSCacheObject *o) |
623 | { | |
624 | CDir *dir = NULL; | |
625 | if (CInode *in = dynamic_cast<CInode*>(o)) { | |
626 | if (!in->is_root()) | |
627 | dir = in->get_parent_dir(); | |
628 | } else if (CDentry *dn = dynamic_cast<CDentry*>(o)) { | |
629 | dir = dn->get_dir(); | |
630 | } else { | |
631 | dir = dynamic_cast<CDir*>(o); | |
632 | assert(dir); | |
633 | } | |
634 | if (dir) { | |
635 | if (dir->is_freezing_dir()) | |
636 | mdcache->fragment_freeze_inc_num_waiters(dir); | |
637 | if (dir->is_freezing_tree()) { | |
638 | while (!dir->is_freezing_tree_root()) | |
639 | dir = dir->get_parent_dir(); | |
640 | mdcache->migrator->export_freeze_inc_num_waiters(dir); | |
641 | } | |
642 | } | |
643 | } | |
7c673cae FG |
644 | |
645 | void Locker::set_xlocks_done(MutationImpl *mut, bool skip_dentry) | |
646 | { | |
647 | for (set<SimpleLock*>::iterator p = mut->xlocks.begin(); | |
648 | p != mut->xlocks.end(); | |
649 | ++p) { | |
650 | MDSCacheObject *object = (*p)->get_parent(); | |
651 | assert(object->is_auth()); | |
652 | if (skip_dentry && | |
653 | ((*p)->get_type() == CEPH_LOCK_DN || (*p)->get_type() == CEPH_LOCK_DVERSION)) | |
654 | continue; | |
655 | dout(10) << "set_xlocks_done on " << **p << " " << *object << dendl; | |
656 | (*p)->set_xlock_done(); | |
657 | } | |
658 | } | |
659 | ||
660 | void Locker::_drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue) | |
661 | { | |
662 | while (!mut->rdlocks.empty()) { | |
663 | bool ni = false; | |
664 | MDSCacheObject *p = (*mut->rdlocks.begin())->get_parent(); | |
665 | rdlock_finish(*mut->rdlocks.begin(), mut, &ni); | |
666 | if (ni) | |
667 | pneed_issue->insert(static_cast<CInode*>(p)); | |
668 | } | |
669 | } | |
670 | ||
671 | void Locker::_drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue) | |
672 | { | |
673 | set<mds_rank_t> slaves; | |
674 | ||
675 | while (!mut->xlocks.empty()) { | |
676 | SimpleLock *lock = *mut->xlocks.begin(); | |
677 | MDSCacheObject *p = lock->get_parent(); | |
678 | if (!p->is_auth()) { | |
679 | assert(lock->get_sm()->can_remote_xlock); | |
680 | slaves.insert(p->authority().first); | |
681 | lock->put_xlock(); | |
682 | mut->locks.erase(lock); | |
683 | mut->xlocks.erase(lock); | |
684 | continue; | |
685 | } | |
686 | bool ni = false; | |
687 | xlock_finish(lock, mut, &ni); | |
688 | if (ni) | |
689 | pneed_issue->insert(static_cast<CInode*>(p)); | |
690 | } | |
691 | ||
692 | while (!mut->remote_wrlocks.empty()) { | |
693 | map<SimpleLock*,mds_rank_t>::iterator p = mut->remote_wrlocks.begin(); | |
694 | slaves.insert(p->second); | |
695 | if (mut->wrlocks.count(p->first) == 0) | |
696 | mut->locks.erase(p->first); | |
697 | mut->remote_wrlocks.erase(p); | |
698 | } | |
699 | ||
700 | while (!mut->wrlocks.empty()) { | |
701 | bool ni = false; | |
702 | MDSCacheObject *p = (*mut->wrlocks.begin())->get_parent(); | |
703 | wrlock_finish(*mut->wrlocks.begin(), mut, &ni); | |
704 | if (ni) | |
705 | pneed_issue->insert(static_cast<CInode*>(p)); | |
706 | } | |
707 | ||
708 | for (set<mds_rank_t>::iterator p = slaves.begin(); p != slaves.end(); ++p) { | |
709 | if (!mds->is_cluster_degraded() || | |
710 | mds->mdsmap->get_state(*p) >= MDSMap::STATE_REJOIN) { | |
711 | dout(10) << "_drop_non_rdlocks dropping remote locks on mds." << *p << dendl; | |
712 | MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt, | |
713 | MMDSSlaveRequest::OP_DROPLOCKS); | |
714 | mds->send_message_mds(slavereq, *p); | |
715 | } | |
716 | } | |
717 | } | |
718 | ||
719 | void Locker::cancel_locking(MutationImpl *mut, set<CInode*> *pneed_issue) | |
720 | { | |
721 | SimpleLock *lock = mut->locking; | |
722 | assert(lock); | |
723 | dout(10) << "cancel_locking " << *lock << " on " << *mut << dendl; | |
724 | ||
725 | if (lock->get_parent()->is_auth()) { | |
726 | bool need_issue = false; | |
727 | if (lock->get_state() == LOCK_PREXLOCK) { | |
728 | _finish_xlock(lock, -1, &need_issue); | |
729 | } else if (lock->get_state() == LOCK_LOCK_XLOCK && | |
730 | lock->get_num_xlocks() == 0) { | |
731 | lock->set_state(LOCK_XLOCKDONE); | |
732 | eval_gather(lock, true, &need_issue); | |
733 | } | |
734 | if (need_issue) | |
735 | pneed_issue->insert(static_cast<CInode *>(lock->get_parent())); | |
736 | } | |
737 | mut->finish_locking(lock); | |
738 | } | |
739 | ||
740 | void Locker::drop_locks(MutationImpl *mut, set<CInode*> *pneed_issue) | |
741 | { | |
742 | // leftover locks | |
743 | set<CInode*> my_need_issue; | |
744 | if (!pneed_issue) | |
745 | pneed_issue = &my_need_issue; | |
746 | ||
747 | if (mut->locking) | |
748 | cancel_locking(mut, pneed_issue); | |
749 | _drop_non_rdlocks(mut, pneed_issue); | |
750 | _drop_rdlocks(mut, pneed_issue); | |
751 | ||
752 | if (pneed_issue == &my_need_issue) | |
753 | issue_caps_set(*pneed_issue); | |
754 | mut->done_locking = false; | |
755 | } | |
756 | ||
757 | void Locker::drop_non_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue) | |
758 | { | |
759 | set<CInode*> my_need_issue; | |
760 | if (!pneed_issue) | |
761 | pneed_issue = &my_need_issue; | |
762 | ||
763 | _drop_non_rdlocks(mut, pneed_issue); | |
764 | ||
765 | if (pneed_issue == &my_need_issue) | |
766 | issue_caps_set(*pneed_issue); | |
767 | } | |
768 | ||
769 | void Locker::drop_rdlocks(MutationImpl *mut, set<CInode*> *pneed_issue) | |
770 | { | |
771 | set<CInode*> my_need_issue; | |
772 | if (!pneed_issue) | |
773 | pneed_issue = &my_need_issue; | |
774 | ||
775 | _drop_rdlocks(mut, pneed_issue); | |
776 | ||
777 | if (pneed_issue == &my_need_issue) | |
778 | issue_caps_set(*pneed_issue); | |
779 | } | |
780 | ||
781 | ||
782 | // generics | |
783 | ||
784 | void Locker::eval_gather(SimpleLock *lock, bool first, bool *pneed_issue, list<MDSInternalContextBase*> *pfinishers) | |
785 | { | |
786 | dout(10) << "eval_gather " << *lock << " on " << *lock->get_parent() << dendl; | |
787 | assert(!lock->is_stable()); | |
788 | ||
789 | int next = lock->get_next_state(); | |
790 | ||
791 | CInode *in = 0; | |
792 | bool caps = lock->get_cap_shift(); | |
793 | if (lock->get_type() != CEPH_LOCK_DN) | |
794 | in = static_cast<CInode *>(lock->get_parent()); | |
795 | ||
796 | bool need_issue = false; | |
797 | ||
798 | int loner_issued = 0, other_issued = 0, xlocker_issued = 0; | |
799 | assert(!caps || in != NULL); | |
800 | if (caps && in->is_head()) { | |
801 | in->get_caps_issued(&loner_issued, &other_issued, &xlocker_issued, | |
802 | lock->get_cap_shift(), lock->get_cap_mask()); | |
803 | dout(10) << " next state is " << lock->get_state_name(next) | |
804 | << " issued/allows loner " << gcap_string(loner_issued) | |
805 | << "/" << gcap_string(lock->gcaps_allowed(CAP_LONER, next)) | |
806 | << " xlocker " << gcap_string(xlocker_issued) | |
807 | << "/" << gcap_string(lock->gcaps_allowed(CAP_XLOCKER, next)) | |
808 | << " other " << gcap_string(other_issued) | |
809 | << "/" << gcap_string(lock->gcaps_allowed(CAP_ANY, next)) | |
810 | << dendl; | |
811 | ||
812 | if (first && ((~lock->gcaps_allowed(CAP_ANY, next) & other_issued) || | |
813 | (~lock->gcaps_allowed(CAP_LONER, next) & loner_issued) || | |
814 | (~lock->gcaps_allowed(CAP_XLOCKER, next) & xlocker_issued))) | |
815 | need_issue = true; | |
816 | } | |
817 | ||
818 | #define IS_TRUE_AND_LT_AUTH(x, auth) (x && ((auth && x <= AUTH) || (!auth && x < AUTH))) | |
819 | bool auth = lock->get_parent()->is_auth(); | |
820 | if (!lock->is_gathering() && | |
821 | (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_rdlock, auth) || !lock->is_rdlocked()) && | |
822 | (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_wrlock, auth) || !lock->is_wrlocked()) && | |
823 | (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_xlock, auth) || !lock->is_xlocked()) && | |
824 | (IS_TRUE_AND_LT_AUTH(lock->get_sm()->states[next].can_lease, auth) || !lock->is_leased()) && | |
825 | !(lock->get_parent()->is_auth() && lock->is_flushing()) && // i.e. wait for scatter_writebehind! | |
826 | (!caps || ((~lock->gcaps_allowed(CAP_ANY, next) & other_issued) == 0 && | |
827 | (~lock->gcaps_allowed(CAP_LONER, next) & loner_issued) == 0 && | |
828 | (~lock->gcaps_allowed(CAP_XLOCKER, next) & xlocker_issued) == 0)) && | |
829 | lock->get_state() != LOCK_SYNC_MIX2 && // these states need an explicit trigger from the auth mds | |
830 | lock->get_state() != LOCK_MIX_SYNC2 | |
831 | ) { | |
832 | dout(7) << "eval_gather finished gather on " << *lock | |
833 | << " on " << *lock->get_parent() << dendl; | |
834 | ||
835 | if (lock->get_sm() == &sm_filelock) { | |
836 | assert(in); | |
837 | if (in->state_test(CInode::STATE_RECOVERING)) { | |
838 | dout(7) << "eval_gather finished gather, but still recovering" << dendl; | |
839 | return; | |
840 | } else if (in->state_test(CInode::STATE_NEEDSRECOVER)) { | |
841 | dout(7) << "eval_gather finished gather, but need to recover" << dendl; | |
842 | mds->mdcache->queue_file_recover(in); | |
843 | mds->mdcache->do_file_recover(); | |
844 | return; | |
845 | } | |
846 | } | |
847 | ||
848 | if (!lock->get_parent()->is_auth()) { | |
849 | // replica: tell auth | |
850 | mds_rank_t auth = lock->get_parent()->authority().first; | |
851 | ||
852 | if (lock->get_parent()->is_rejoining() && | |
853 | mds->mdsmap->get_state(auth) == MDSMap::STATE_REJOIN) { | |
854 | dout(7) << "eval_gather finished gather, but still rejoining " | |
855 | << *lock->get_parent() << dendl; | |
856 | return; | |
857 | } | |
858 | ||
859 | if (!mds->is_cluster_degraded() || | |
860 | mds->mdsmap->get_state(auth) >= MDSMap::STATE_REJOIN) { | |
861 | switch (lock->get_state()) { | |
862 | case LOCK_SYNC_LOCK: | |
863 | mds->send_message_mds(new MLock(lock, LOCK_AC_LOCKACK, mds->get_nodeid()), | |
864 | auth); | |
865 | break; | |
866 | ||
867 | case LOCK_MIX_SYNC: | |
868 | { | |
869 | MLock *reply = new MLock(lock, LOCK_AC_SYNCACK, mds->get_nodeid()); | |
870 | lock->encode_locked_state(reply->get_data()); | |
871 | mds->send_message_mds(reply, auth); | |
872 | next = LOCK_MIX_SYNC2; | |
873 | (static_cast<ScatterLock *>(lock))->start_flush(); | |
874 | } | |
875 | break; | |
876 | ||
877 | case LOCK_MIX_SYNC2: | |
878 | (static_cast<ScatterLock *>(lock))->finish_flush(); | |
879 | (static_cast<ScatterLock *>(lock))->clear_flushed(); | |
880 | ||
881 | case LOCK_SYNC_MIX2: | |
882 | // do nothing, we already acked | |
883 | break; | |
884 | ||
885 | case LOCK_SYNC_MIX: | |
886 | { | |
887 | MLock *reply = new MLock(lock, LOCK_AC_MIXACK, mds->get_nodeid()); | |
888 | mds->send_message_mds(reply, auth); | |
889 | next = LOCK_SYNC_MIX2; | |
890 | } | |
891 | break; | |
892 | ||
893 | case LOCK_MIX_LOCK: | |
894 | { | |
895 | bufferlist data; | |
896 | lock->encode_locked_state(data); | |
897 | mds->send_message_mds(new MLock(lock, LOCK_AC_LOCKACK, mds->get_nodeid(), data), auth); | |
898 | (static_cast<ScatterLock *>(lock))->start_flush(); | |
899 | // we'll get an AC_LOCKFLUSHED to complete | |
900 | } | |
901 | break; | |
902 | ||
903 | default: | |
904 | ceph_abort(); | |
905 | } | |
906 | } | |
907 | } else { | |
908 | // auth | |
909 | ||
910 | // once the first (local) stage of mix->lock gather complete we can | |
911 | // gather from replicas | |
912 | if (lock->get_state() == LOCK_MIX_LOCK && | |
913 | lock->get_parent()->is_replicated()) { | |
914 | dout(10) << " finished (local) gather for mix->lock, now gathering from replicas" << dendl; | |
915 | send_lock_message(lock, LOCK_AC_LOCK); | |
916 | lock->init_gather(); | |
917 | lock->set_state(LOCK_MIX_LOCK2); | |
918 | return; | |
919 | } | |
920 | ||
921 | if (lock->is_dirty() && !lock->is_flushed()) { | |
922 | scatter_writebehind(static_cast<ScatterLock *>(lock)); | |
923 | mds->mdlog->flush(); | |
924 | return; | |
925 | } | |
926 | lock->clear_flushed(); | |
927 | ||
928 | switch (lock->get_state()) { | |
929 | // to mixed | |
930 | case LOCK_TSYN_MIX: | |
931 | case LOCK_SYNC_MIX: | |
932 | case LOCK_EXCL_MIX: | |
933 | in->start_scatter(static_cast<ScatterLock *>(lock)); | |
934 | if (lock->get_parent()->is_replicated()) { | |
935 | bufferlist softdata; | |
936 | lock->encode_locked_state(softdata); | |
937 | send_lock_message(lock, LOCK_AC_MIX, softdata); | |
938 | } | |
939 | (static_cast<ScatterLock *>(lock))->clear_scatter_wanted(); | |
940 | break; | |
941 | ||
942 | case LOCK_XLOCK: | |
943 | case LOCK_XLOCKDONE: | |
944 | if (next != LOCK_SYNC) | |
945 | break; | |
946 | // fall-thru | |
947 | ||
948 | // to sync | |
949 | case LOCK_EXCL_SYNC: | |
950 | case LOCK_LOCK_SYNC: | |
951 | case LOCK_MIX_SYNC: | |
952 | case LOCK_XSYN_SYNC: | |
953 | if (lock->get_parent()->is_replicated()) { | |
954 | bufferlist softdata; | |
955 | lock->encode_locked_state(softdata); | |
956 | send_lock_message(lock, LOCK_AC_SYNC, softdata); | |
957 | } | |
958 | break; | |
959 | } | |
960 | ||
961 | } | |
962 | ||
963 | lock->set_state(next); | |
964 | ||
965 | if (lock->get_parent()->is_auth() && | |
966 | lock->is_stable()) | |
967 | lock->get_parent()->auth_unpin(lock); | |
968 | ||
969 | // drop loner before doing waiters | |
970 | if (caps && | |
971 | in->is_head() && | |
972 | in->is_auth() && | |
973 | in->get_wanted_loner() != in->get_loner()) { | |
974 | dout(10) << " trying to drop loner" << dendl; | |
975 | if (in->try_drop_loner()) { | |
976 | dout(10) << " dropped loner" << dendl; | |
977 | need_issue = true; | |
978 | } | |
979 | } | |
980 | ||
981 | if (pfinishers) | |
982 | lock->take_waiting(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD|SimpleLock::WAIT_XLOCK, | |
983 | *pfinishers); | |
984 | else | |
985 | lock->finish_waiters(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD|SimpleLock::WAIT_XLOCK); | |
986 | ||
987 | if (caps && in->is_head()) | |
988 | need_issue = true; | |
989 | ||
990 | if (lock->get_parent()->is_auth() && | |
991 | lock->is_stable()) | |
992 | try_eval(lock, &need_issue); | |
993 | } | |
994 | ||
995 | if (need_issue) { | |
996 | if (pneed_issue) | |
997 | *pneed_issue = true; | |
998 | else if (in->is_head()) | |
999 | issue_caps(in); | |
1000 | } | |
1001 | ||
1002 | } | |
1003 | ||
1004 | bool Locker::eval(CInode *in, int mask, bool caps_imported) | |
1005 | { | |
1006 | bool need_issue = caps_imported; | |
1007 | list<MDSInternalContextBase*> finishers; | |
1008 | ||
1009 | dout(10) << "eval " << mask << " " << *in << dendl; | |
1010 | ||
1011 | // choose loner? | |
1012 | if (in->is_auth() && in->is_head()) { | |
1013 | if (in->choose_ideal_loner() >= 0) { | |
1014 | if (in->try_set_loner()) { | |
1015 | dout(10) << "eval set loner to client." << in->get_loner() << dendl; | |
1016 | need_issue = true; | |
1017 | mask = -1; | |
1018 | } else | |
1019 | dout(10) << "eval want loner client." << in->get_wanted_loner() << " but failed to set it" << dendl; | |
1020 | } else | |
1021 | dout(10) << "eval doesn't want loner" << dendl; | |
1022 | } | |
1023 | ||
1024 | retry: | |
1025 | if (mask & CEPH_LOCK_IFILE) | |
1026 | eval_any(&in->filelock, &need_issue, &finishers, caps_imported); | |
1027 | if (mask & CEPH_LOCK_IAUTH) | |
1028 | eval_any(&in->authlock, &need_issue, &finishers, caps_imported); | |
1029 | if (mask & CEPH_LOCK_ILINK) | |
1030 | eval_any(&in->linklock, &need_issue, &finishers, caps_imported); | |
1031 | if (mask & CEPH_LOCK_IXATTR) | |
1032 | eval_any(&in->xattrlock, &need_issue, &finishers, caps_imported); | |
1033 | if (mask & CEPH_LOCK_INEST) | |
1034 | eval_any(&in->nestlock, &need_issue, &finishers, caps_imported); | |
1035 | if (mask & CEPH_LOCK_IFLOCK) | |
1036 | eval_any(&in->flocklock, &need_issue, &finishers, caps_imported); | |
1037 | if (mask & CEPH_LOCK_IPOLICY) | |
1038 | eval_any(&in->policylock, &need_issue, &finishers, caps_imported); | |
1039 | ||
1040 | // drop loner? | |
1041 | if (in->is_auth() && in->is_head() && in->get_wanted_loner() != in->get_loner()) { | |
1042 | dout(10) << " trying to drop loner" << dendl; | |
1043 | if (in->try_drop_loner()) { | |
1044 | dout(10) << " dropped loner" << dendl; | |
1045 | need_issue = true; | |
1046 | ||
1047 | if (in->get_wanted_loner() >= 0) { | |
1048 | if (in->try_set_loner()) { | |
1049 | dout(10) << "eval end set loner to client." << in->get_loner() << dendl; | |
1050 | mask = -1; | |
1051 | goto retry; | |
1052 | } else { | |
1053 | dout(10) << "eval want loner client." << in->get_wanted_loner() << " but failed to set it" << dendl; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | finish_contexts(g_ceph_context, finishers); | |
1060 | ||
1061 | if (need_issue && in->is_head()) | |
1062 | issue_caps(in); | |
1063 | ||
1064 | dout(10) << "eval done" << dendl; | |
1065 | return need_issue; | |
1066 | } | |
1067 | ||
1068 | class C_Locker_Eval : public LockerContext { | |
1069 | MDSCacheObject *p; | |
1070 | int mask; | |
1071 | public: | |
1072 | C_Locker_Eval(Locker *l, MDSCacheObject *pp, int m) : LockerContext(l), p(pp), mask(m) { | |
1073 | // We are used as an MDSCacheObject waiter, so should | |
1074 | // only be invoked by someone already holding the big lock. | |
1075 | assert(locker->mds->mds_lock.is_locked_by_me()); | |
1076 | p->get(MDSCacheObject::PIN_PTRWAITER); | |
1077 | } | |
1078 | void finish(int r) override { | |
1079 | locker->try_eval(p, mask); | |
1080 | p->put(MDSCacheObject::PIN_PTRWAITER); | |
1081 | } | |
1082 | }; | |
1083 | ||
1084 | void Locker::try_eval(MDSCacheObject *p, int mask) | |
1085 | { | |
1086 | // unstable and ambiguous auth? | |
1087 | if (p->is_ambiguous_auth()) { | |
1088 | dout(7) << "try_eval ambiguous auth, waiting on " << *p << dendl; | |
1089 | p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_Eval(this, p, mask)); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | if (p->is_auth() && p->is_frozen()) { | |
1094 | dout(7) << "try_eval frozen, waiting on " << *p << dendl; | |
1095 | p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, mask)); | |
1096 | return; | |
1097 | } | |
1098 | ||
1099 | if (mask & CEPH_LOCK_DN) { | |
1100 | assert(mask == CEPH_LOCK_DN); | |
1101 | bool need_issue = false; // ignore this, no caps on dentries | |
1102 | CDentry *dn = static_cast<CDentry *>(p); | |
1103 | eval_any(&dn->lock, &need_issue); | |
1104 | } else { | |
1105 | CInode *in = static_cast<CInode *>(p); | |
1106 | eval(in, mask); | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | void Locker::try_eval(SimpleLock *lock, bool *pneed_issue) | |
1111 | { | |
1112 | MDSCacheObject *p = lock->get_parent(); | |
1113 | ||
1114 | // unstable and ambiguous auth? | |
1115 | if (p->is_ambiguous_auth()) { | |
1116 | dout(7) << "try_eval " << *lock << " ambiguousauth, waiting on " << *p << dendl; | |
1117 | p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_Eval(this, p, lock->get_type())); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | if (!p->is_auth()) { | |
1122 | dout(7) << "try_eval " << *lock << " not auth for " << *p << dendl; | |
1123 | return; | |
1124 | } | |
1125 | ||
1126 | if (p->is_frozen()) { | |
1127 | dout(7) << "try_eval " << *lock << " frozen, waiting on " << *p << dendl; | |
1128 | p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, lock->get_type())); | |
1129 | return; | |
1130 | } | |
1131 | ||
1132 | /* | |
1133 | * We could have a situation like: | |
1134 | * | |
1135 | * - mds A authpins item on mds B | |
1136 | * - mds B starts to freeze tree containing item | |
1137 | * - mds A tries wrlock_start on A, sends REQSCATTER to B | |
1138 | * - mds B lock is unstable, sets scatter_wanted | |
1139 | * - mds B lock stabilizes, calls try_eval. | |
1140 | * | |
1141 | * We can defer while freezing without causing a deadlock. Honor | |
1142 | * scatter_wanted flag here. This will never get deferred by the | |
1143 | * checks above due to the auth_pin held by the master. | |
1144 | */ | |
1145 | if (lock->is_scatterlock()) { | |
1146 | ScatterLock *slock = static_cast<ScatterLock *>(lock); | |
1147 | if (slock->get_scatter_wanted() && | |
1148 | slock->get_state() != LOCK_MIX) { | |
1149 | scatter_mix(slock, pneed_issue); | |
1150 | if (!lock->is_stable()) | |
1151 | return; | |
1152 | } else if (slock->get_unscatter_wanted() && | |
1153 | slock->get_state() != LOCK_LOCK) { | |
1154 | simple_lock(slock, pneed_issue); | |
1155 | if (!lock->is_stable()) { | |
1156 | return; | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | if (lock->get_type() != CEPH_LOCK_DN && p->is_freezing()) { | |
1162 | dout(7) << "try_eval " << *lock << " freezing, waiting on " << *p << dendl; | |
1163 | p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_Eval(this, p, lock->get_type())); | |
1164 | return; | |
1165 | } | |
1166 | ||
1167 | eval(lock, pneed_issue); | |
1168 | } | |
1169 | ||
1170 | void Locker::eval_cap_gather(CInode *in, set<CInode*> *issue_set) | |
1171 | { | |
1172 | bool need_issue = false; | |
1173 | list<MDSInternalContextBase*> finishers; | |
1174 | ||
1175 | // kick locks now | |
1176 | if (!in->filelock.is_stable()) | |
1177 | eval_gather(&in->filelock, false, &need_issue, &finishers); | |
1178 | if (!in->authlock.is_stable()) | |
1179 | eval_gather(&in->authlock, false, &need_issue, &finishers); | |
1180 | if (!in->linklock.is_stable()) | |
1181 | eval_gather(&in->linklock, false, &need_issue, &finishers); | |
1182 | if (!in->xattrlock.is_stable()) | |
1183 | eval_gather(&in->xattrlock, false, &need_issue, &finishers); | |
1184 | ||
1185 | if (need_issue && in->is_head()) { | |
1186 | if (issue_set) | |
1187 | issue_set->insert(in); | |
1188 | else | |
1189 | issue_caps(in); | |
1190 | } | |
1191 | ||
1192 | finish_contexts(g_ceph_context, finishers); | |
1193 | } | |
1194 | ||
1195 | void Locker::eval_scatter_gathers(CInode *in) | |
1196 | { | |
1197 | bool need_issue = false; | |
1198 | list<MDSInternalContextBase*> finishers; | |
1199 | ||
1200 | dout(10) << "eval_scatter_gathers " << *in << dendl; | |
1201 | ||
1202 | // kick locks now | |
1203 | if (!in->filelock.is_stable()) | |
1204 | eval_gather(&in->filelock, false, &need_issue, &finishers); | |
1205 | if (!in->nestlock.is_stable()) | |
1206 | eval_gather(&in->nestlock, false, &need_issue, &finishers); | |
1207 | if (!in->dirfragtreelock.is_stable()) | |
1208 | eval_gather(&in->dirfragtreelock, false, &need_issue, &finishers); | |
1209 | ||
1210 | if (need_issue && in->is_head()) | |
1211 | issue_caps(in); | |
1212 | ||
1213 | finish_contexts(g_ceph_context, finishers); | |
1214 | } | |
1215 | ||
1216 | void Locker::eval(SimpleLock *lock, bool *need_issue) | |
1217 | { | |
1218 | switch (lock->get_type()) { | |
1219 | case CEPH_LOCK_IFILE: | |
1220 | return file_eval(static_cast<ScatterLock*>(lock), need_issue); | |
1221 | case CEPH_LOCK_IDFT: | |
1222 | case CEPH_LOCK_INEST: | |
1223 | return scatter_eval(static_cast<ScatterLock*>(lock), need_issue); | |
1224 | default: | |
1225 | return simple_eval(lock, need_issue); | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | ||
1230 | // ------------------ | |
1231 | // rdlock | |
1232 | ||
1233 | bool Locker::_rdlock_kick(SimpleLock *lock, bool as_anon) | |
1234 | { | |
1235 | // kick the lock | |
1236 | if (lock->is_stable()) { | |
1237 | if (lock->get_parent()->is_auth()) { | |
1238 | if (lock->get_sm() == &sm_scatterlock) { | |
1239 | // not until tempsync is fully implemented | |
1240 | //if (lock->get_parent()->is_replicated()) | |
1241 | //scatter_tempsync((ScatterLock*)lock); | |
1242 | //else | |
1243 | simple_sync(lock); | |
1244 | } else if (lock->get_sm() == &sm_filelock) { | |
1245 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
1246 | if (lock->get_state() == LOCK_EXCL && | |
1247 | in->get_target_loner() >= 0 && | |
1248 | !in->is_dir() && !as_anon) // as_anon => caller wants SYNC, not XSYN | |
1249 | file_xsyn(lock); | |
1250 | else | |
1251 | simple_sync(lock); | |
1252 | } else | |
1253 | simple_sync(lock); | |
1254 | return true; | |
1255 | } else { | |
1256 | // request rdlock state change from auth | |
1257 | mds_rank_t auth = lock->get_parent()->authority().first; | |
1258 | if (!mds->is_cluster_degraded() || | |
1259 | mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) { | |
1260 | dout(10) << "requesting rdlock from auth on " | |
1261 | << *lock << " on " << *lock->get_parent() << dendl; | |
1262 | mds->send_message_mds(new MLock(lock, LOCK_AC_REQRDLOCK, mds->get_nodeid()), auth); | |
1263 | } | |
1264 | return false; | |
1265 | } | |
1266 | } | |
1267 | if (lock->get_type() == CEPH_LOCK_IFILE) { | |
1268 | CInode *in = static_cast<CInode *>(lock->get_parent()); | |
1269 | if (in->state_test(CInode::STATE_RECOVERING)) { | |
1270 | mds->mdcache->recovery_queue.prioritize(in); | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | return false; | |
1275 | } | |
1276 | ||
1277 | bool Locker::rdlock_try(SimpleLock *lock, client_t client, MDSInternalContextBase *con) | |
1278 | { | |
1279 | dout(7) << "rdlock_try on " << *lock << " on " << *lock->get_parent() << dendl; | |
1280 | ||
1281 | // can read? grab ref. | |
1282 | if (lock->can_rdlock(client)) | |
1283 | return true; | |
1284 | ||
1285 | _rdlock_kick(lock, false); | |
1286 | ||
1287 | if (lock->can_rdlock(client)) | |
1288 | return true; | |
1289 | ||
1290 | // wait! | |
1291 | if (con) { | |
1292 | dout(7) << "rdlock_try waiting on " << *lock << " on " << *lock->get_parent() << dendl; | |
1293 | lock->add_waiter(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_RD, con); | |
1294 | } | |
1295 | return false; | |
1296 | } | |
1297 | ||
1298 | bool Locker::rdlock_start(SimpleLock *lock, MDRequestRef& mut, bool as_anon) | |
1299 | { | |
1300 | dout(7) << "rdlock_start on " << *lock << " on " << *lock->get_parent() << dendl; | |
1301 | ||
1302 | // client may be allowed to rdlock the same item it has xlocked. | |
1303 | // UNLESS someone passes in as_anon, or we're reading snapped version here. | |
1304 | if (mut->snapid != CEPH_NOSNAP) | |
1305 | as_anon = true; | |
1306 | client_t client = as_anon ? -1 : mut->get_client(); | |
1307 | ||
1308 | CInode *in = 0; | |
1309 | if (lock->get_type() != CEPH_LOCK_DN) | |
1310 | in = static_cast<CInode *>(lock->get_parent()); | |
1311 | ||
1312 | /* | |
1313 | if (!lock->get_parent()->is_auth() && | |
1314 | lock->fw_rdlock_to_auth()) { | |
1315 | mdcache->request_forward(mut, lock->get_parent()->authority().first); | |
1316 | return false; | |
1317 | } | |
1318 | */ | |
1319 | ||
1320 | while (1) { | |
1321 | // can read? grab ref. | |
1322 | if (lock->can_rdlock(client)) { | |
1323 | lock->get_rdlock(); | |
1324 | mut->rdlocks.insert(lock); | |
1325 | mut->locks.insert(lock); | |
1326 | return true; | |
1327 | } | |
1328 | ||
1329 | // hmm, wait a second. | |
1330 | if (in && !in->is_head() && in->is_auth() && | |
1331 | lock->get_state() == LOCK_SNAP_SYNC) { | |
1332 | // okay, we actually need to kick the head's lock to get ourselves synced up. | |
1333 | CInode *head = mdcache->get_inode(in->ino()); | |
1334 | assert(head); | |
c07f9fc5 FG |
1335 | SimpleLock *hlock = head->get_lock(CEPH_LOCK_IFILE); |
1336 | if (hlock->get_state() == LOCK_SYNC) | |
1337 | hlock = head->get_lock(lock->get_type()); | |
1338 | ||
7c673cae FG |
1339 | if (hlock->get_state() != LOCK_SYNC) { |
1340 | dout(10) << "rdlock_start trying head inode " << *head << dendl; | |
c07f9fc5 | 1341 | if (!rdlock_start(hlock, mut, true)) // ** as_anon, no rdlock on EXCL ** |
7c673cae FG |
1342 | return false; |
1343 | // oh, check our lock again then | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | if (!_rdlock_kick(lock, as_anon)) | |
1348 | break; | |
1349 | } | |
1350 | ||
1351 | // wait! | |
1352 | int wait_on; | |
1353 | if (lock->get_parent()->is_auth() && lock->is_stable()) | |
1354 | wait_on = SimpleLock::WAIT_RD; | |
1355 | else | |
1356 | wait_on = SimpleLock::WAIT_STABLE; // REQRDLOCK is ignored if lock is unstable, so we need to retry. | |
1357 | dout(7) << "rdlock_start waiting on " << *lock << " on " << *lock->get_parent() << dendl; | |
1358 | lock->add_waiter(wait_on, new C_MDS_RetryRequest(mdcache, mut)); | |
1359 | nudge_log(lock); | |
1360 | return false; | |
1361 | } | |
1362 | ||
1363 | void Locker::nudge_log(SimpleLock *lock) | |
1364 | { | |
1365 | dout(10) << "nudge_log " << *lock << " on " << *lock->get_parent() << dendl; | |
1366 | if (lock->get_parent()->is_auth() && lock->is_unstable_and_locked()) // as with xlockdone, or cap flush | |
1367 | mds->mdlog->flush(); | |
1368 | } | |
1369 | ||
1370 | void Locker::rdlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue) | |
1371 | { | |
1372 | // drop ref | |
1373 | lock->put_rdlock(); | |
1374 | if (mut) { | |
1375 | mut->rdlocks.erase(lock); | |
1376 | mut->locks.erase(lock); | |
1377 | } | |
1378 | ||
1379 | dout(7) << "rdlock_finish on " << *lock << " on " << *lock->get_parent() << dendl; | |
1380 | ||
1381 | // last one? | |
1382 | if (!lock->is_rdlocked()) { | |
1383 | if (!lock->is_stable()) | |
1384 | eval_gather(lock, false, pneed_issue); | |
1385 | else if (lock->get_parent()->is_auth()) | |
1386 | try_eval(lock, pneed_issue); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | ||
1391 | bool Locker::can_rdlock_set(set<SimpleLock*>& locks) | |
1392 | { | |
1393 | dout(10) << "can_rdlock_set " << locks << dendl; | |
1394 | for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p) | |
1395 | if (!(*p)->can_rdlock(-1)) { | |
1396 | dout(10) << "can_rdlock_set can't rdlock " << *p << " on " << *(*p)->get_parent() << dendl; | |
1397 | return false; | |
1398 | } | |
1399 | return true; | |
1400 | } | |
1401 | ||
1402 | bool Locker::rdlock_try_set(set<SimpleLock*>& locks) | |
1403 | { | |
1404 | dout(10) << "rdlock_try_set " << locks << dendl; | |
1405 | for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p) | |
1406 | if (!rdlock_try(*p, -1, NULL)) { | |
1407 | dout(10) << "rdlock_try_set can't rdlock " << *p << " on " << *(*p)->get_parent() << dendl; | |
1408 | return false; | |
1409 | } | |
1410 | return true; | |
1411 | } | |
1412 | ||
1413 | void Locker::rdlock_take_set(set<SimpleLock*>& locks, MutationRef& mut) | |
1414 | { | |
1415 | dout(10) << "rdlock_take_set " << locks << dendl; | |
1416 | for (set<SimpleLock*>::iterator p = locks.begin(); p != locks.end(); ++p) { | |
1417 | (*p)->get_rdlock(); | |
1418 | mut->rdlocks.insert(*p); | |
1419 | mut->locks.insert(*p); | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | // ------------------ | |
1424 | // wrlock | |
1425 | ||
1426 | void Locker::wrlock_force(SimpleLock *lock, MutationRef& mut) | |
1427 | { | |
1428 | if (lock->get_type() == CEPH_LOCK_IVERSION || | |
1429 | lock->get_type() == CEPH_LOCK_DVERSION) | |
1430 | return local_wrlock_grab(static_cast<LocalLock*>(lock), mut); | |
1431 | ||
1432 | dout(7) << "wrlock_force on " << *lock | |
1433 | << " on " << *lock->get_parent() << dendl; | |
1434 | lock->get_wrlock(true); | |
1435 | mut->wrlocks.insert(lock); | |
1436 | mut->locks.insert(lock); | |
1437 | } | |
1438 | ||
1439 | bool Locker::wrlock_start(SimpleLock *lock, MDRequestRef& mut, bool nowait) | |
1440 | { | |
1441 | if (lock->get_type() == CEPH_LOCK_IVERSION || | |
1442 | lock->get_type() == CEPH_LOCK_DVERSION) | |
1443 | return local_wrlock_start(static_cast<LocalLock*>(lock), mut); | |
1444 | ||
1445 | dout(10) << "wrlock_start " << *lock << " on " << *lock->get_parent() << dendl; | |
1446 | ||
1447 | CInode *in = static_cast<CInode *>(lock->get_parent()); | |
1448 | client_t client = mut->get_client(); | |
1449 | bool want_scatter = !nowait && lock->get_parent()->is_auth() && | |
1450 | (in->has_subtree_or_exporting_dirfrag() || | |
1451 | static_cast<ScatterLock*>(lock)->get_scatter_wanted()); | |
1452 | ||
1453 | while (1) { | |
1454 | // wrlock? | |
1455 | if (lock->can_wrlock(client) && | |
1456 | (!want_scatter || lock->get_state() == LOCK_MIX)) { | |
1457 | lock->get_wrlock(); | |
1458 | mut->wrlocks.insert(lock); | |
1459 | mut->locks.insert(lock); | |
1460 | return true; | |
1461 | } | |
1462 | ||
1463 | if (lock->get_type() == CEPH_LOCK_IFILE && | |
1464 | in->state_test(CInode::STATE_RECOVERING)) { | |
1465 | mds->mdcache->recovery_queue.prioritize(in); | |
1466 | } | |
1467 | ||
1468 | if (!lock->is_stable()) | |
1469 | break; | |
1470 | ||
1471 | if (in->is_auth()) { | |
1472 | // don't do nested lock state change if we have dirty scatterdata and | |
1473 | // may scatter_writebehind or start_scatter, because nowait==true implies | |
1474 | // that the caller already has a log entry open! | |
1475 | if (nowait && lock->is_dirty()) | |
1476 | return false; | |
1477 | ||
1478 | if (want_scatter) | |
1479 | scatter_mix(static_cast<ScatterLock*>(lock)); | |
1480 | else | |
1481 | simple_lock(lock); | |
1482 | ||
1483 | if (nowait && !lock->can_wrlock(client)) | |
1484 | return false; | |
1485 | ||
1486 | } else { | |
1487 | // replica. | |
1488 | // auth should be auth_pinned (see acquire_locks wrlock weird mustpin case). | |
1489 | mds_rank_t auth = lock->get_parent()->authority().first; | |
1490 | if (!mds->is_cluster_degraded() || | |
1491 | mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) { | |
1492 | dout(10) << "requesting scatter from auth on " | |
1493 | << *lock << " on " << *lock->get_parent() << dendl; | |
1494 | mds->send_message_mds(new MLock(lock, LOCK_AC_REQSCATTER, mds->get_nodeid()), auth); | |
1495 | } | |
1496 | break; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | if (!nowait) { | |
1501 | dout(7) << "wrlock_start waiting on " << *lock << " on " << *lock->get_parent() << dendl; | |
1502 | lock->add_waiter(SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut)); | |
1503 | nudge_log(lock); | |
1504 | } | |
1505 | ||
1506 | return false; | |
1507 | } | |
1508 | ||
1509 | void Locker::wrlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue) | |
1510 | { | |
1511 | if (lock->get_type() == CEPH_LOCK_IVERSION || | |
1512 | lock->get_type() == CEPH_LOCK_DVERSION) | |
1513 | return local_wrlock_finish(static_cast<LocalLock*>(lock), mut); | |
1514 | ||
1515 | dout(7) << "wrlock_finish on " << *lock << " on " << *lock->get_parent() << dendl; | |
1516 | lock->put_wrlock(); | |
1517 | if (mut) { | |
1518 | mut->wrlocks.erase(lock); | |
1519 | if (mut->remote_wrlocks.count(lock) == 0) | |
1520 | mut->locks.erase(lock); | |
1521 | } | |
1522 | ||
1523 | if (!lock->is_wrlocked()) { | |
1524 | if (!lock->is_stable()) | |
1525 | eval_gather(lock, false, pneed_issue); | |
1526 | else if (lock->get_parent()->is_auth()) | |
1527 | try_eval(lock, pneed_issue); | |
1528 | } | |
1529 | } | |
1530 | ||
1531 | ||
1532 | // remote wrlock | |
1533 | ||
1534 | void Locker::remote_wrlock_start(SimpleLock *lock, mds_rank_t target, MDRequestRef& mut) | |
1535 | { | |
1536 | dout(7) << "remote_wrlock_start mds." << target << " on " << *lock << " on " << *lock->get_parent() << dendl; | |
1537 | ||
1538 | // wait for active target | |
1539 | if (mds->is_cluster_degraded() && | |
1540 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(target)) { | |
1541 | dout(7) << " mds." << target << " is not active" << dendl; | |
1542 | if (mut->more()->waiting_on_slave.empty()) | |
1543 | mds->wait_for_active_peer(target, new C_MDS_RetryRequest(mdcache, mut)); | |
1544 | return; | |
1545 | } | |
1546 | ||
1547 | // send lock request | |
1548 | mut->start_locking(lock, target); | |
1549 | mut->more()->slaves.insert(target); | |
1550 | MMDSSlaveRequest *r = new MMDSSlaveRequest(mut->reqid, mut->attempt, | |
1551 | MMDSSlaveRequest::OP_WRLOCK); | |
1552 | r->set_lock_type(lock->get_type()); | |
1553 | lock->get_parent()->set_object_info(r->get_object_info()); | |
1554 | mds->send_message_mds(r, target); | |
1555 | ||
1556 | assert(mut->more()->waiting_on_slave.count(target) == 0); | |
1557 | mut->more()->waiting_on_slave.insert(target); | |
1558 | } | |
1559 | ||
1560 | void Locker::remote_wrlock_finish(SimpleLock *lock, mds_rank_t target, | |
1561 | MutationImpl *mut) | |
1562 | { | |
1563 | // drop ref | |
1564 | mut->remote_wrlocks.erase(lock); | |
1565 | if (mut->wrlocks.count(lock) == 0) | |
1566 | mut->locks.erase(lock); | |
1567 | ||
1568 | dout(7) << "remote_wrlock_finish releasing remote wrlock on mds." << target | |
1569 | << " " << *lock->get_parent() << dendl; | |
1570 | if (!mds->is_cluster_degraded() || | |
1571 | mds->mdsmap->get_state(target) >= MDSMap::STATE_REJOIN) { | |
1572 | MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt, | |
1573 | MMDSSlaveRequest::OP_UNWRLOCK); | |
1574 | slavereq->set_lock_type(lock->get_type()); | |
1575 | lock->get_parent()->set_object_info(slavereq->get_object_info()); | |
1576 | mds->send_message_mds(slavereq, target); | |
1577 | } | |
1578 | } | |
1579 | ||
1580 | ||
1581 | // ------------------ | |
1582 | // xlock | |
1583 | ||
1584 | bool Locker::xlock_start(SimpleLock *lock, MDRequestRef& mut) | |
1585 | { | |
1586 | if (lock->get_type() == CEPH_LOCK_IVERSION || | |
1587 | lock->get_type() == CEPH_LOCK_DVERSION) | |
1588 | return local_xlock_start(static_cast<LocalLock*>(lock), mut); | |
1589 | ||
1590 | dout(7) << "xlock_start on " << *lock << " on " << *lock->get_parent() << dendl; | |
1591 | client_t client = mut->get_client(); | |
1592 | ||
1593 | // auth? | |
1594 | if (lock->get_parent()->is_auth()) { | |
1595 | // auth | |
1596 | while (1) { | |
1597 | if (lock->can_xlock(client)) { | |
1598 | lock->set_state(LOCK_XLOCK); | |
1599 | lock->get_xlock(mut, client); | |
1600 | mut->xlocks.insert(lock); | |
1601 | mut->locks.insert(lock); | |
1602 | mut->finish_locking(lock); | |
1603 | return true; | |
1604 | } | |
1605 | ||
1606 | if (lock->get_type() == CEPH_LOCK_IFILE) { | |
1607 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
1608 | if (in->state_test(CInode::STATE_RECOVERING)) { | |
1609 | mds->mdcache->recovery_queue.prioritize(in); | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | if (!lock->is_stable() && (lock->get_state() != LOCK_XLOCKDONE || | |
1614 | lock->get_xlock_by_client() != client || | |
1615 | lock->is_waiter_for(SimpleLock::WAIT_STABLE))) | |
1616 | break; | |
1617 | ||
1618 | if (lock->get_state() == LOCK_LOCK || lock->get_state() == LOCK_XLOCKDONE) { | |
1619 | mut->start_locking(lock); | |
1620 | simple_xlock(lock); | |
1621 | } else { | |
1622 | simple_lock(lock); | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut)); | |
1627 | nudge_log(lock); | |
1628 | return false; | |
1629 | } else { | |
1630 | // replica | |
1631 | assert(lock->get_sm()->can_remote_xlock); | |
1632 | assert(!mut->slave_request); | |
1633 | ||
1634 | // wait for single auth | |
1635 | if (lock->get_parent()->is_ambiguous_auth()) { | |
1636 | lock->get_parent()->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, | |
1637 | new C_MDS_RetryRequest(mdcache, mut)); | |
1638 | return false; | |
1639 | } | |
1640 | ||
1641 | // wait for active auth | |
1642 | mds_rank_t auth = lock->get_parent()->authority().first; | |
1643 | if (mds->is_cluster_degraded() && | |
1644 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) { | |
1645 | dout(7) << " mds." << auth << " is not active" << dendl; | |
1646 | if (mut->more()->waiting_on_slave.empty()) | |
1647 | mds->wait_for_active_peer(auth, new C_MDS_RetryRequest(mdcache, mut)); | |
1648 | return false; | |
1649 | } | |
1650 | ||
1651 | // send lock request | |
1652 | mut->more()->slaves.insert(auth); | |
1653 | mut->start_locking(lock, auth); | |
1654 | MMDSSlaveRequest *r = new MMDSSlaveRequest(mut->reqid, mut->attempt, | |
1655 | MMDSSlaveRequest::OP_XLOCK); | |
1656 | r->set_lock_type(lock->get_type()); | |
1657 | lock->get_parent()->set_object_info(r->get_object_info()); | |
1658 | mds->send_message_mds(r, auth); | |
1659 | ||
1660 | assert(mut->more()->waiting_on_slave.count(auth) == 0); | |
1661 | mut->more()->waiting_on_slave.insert(auth); | |
1662 | ||
1663 | return false; | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | void Locker::_finish_xlock(SimpleLock *lock, client_t xlocker, bool *pneed_issue) | |
1668 | { | |
1669 | assert(!lock->is_stable()); | |
1670 | if (lock->get_num_rdlocks() == 0 && | |
1671 | lock->get_num_wrlocks() == 0 && | |
1672 | lock->get_num_client_lease() == 0 && | |
1673 | lock->get_state() != LOCK_XLOCKSNAP && | |
1674 | lock->get_type() != CEPH_LOCK_DN) { | |
1675 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
1676 | client_t loner = in->get_target_loner(); | |
1677 | if (loner >= 0 && (xlocker < 0 || xlocker == loner)) { | |
1678 | lock->set_state(LOCK_EXCL); | |
1679 | lock->get_parent()->auth_unpin(lock); | |
1680 | lock->finish_waiters(SimpleLock::WAIT_STABLE|SimpleLock::WAIT_WR|SimpleLock::WAIT_RD); | |
1681 | if (lock->get_cap_shift()) | |
1682 | *pneed_issue = true; | |
1683 | if (lock->get_parent()->is_auth() && | |
1684 | lock->is_stable()) | |
1685 | try_eval(lock, pneed_issue); | |
1686 | return; | |
1687 | } | |
1688 | } | |
1689 | // the xlocker may have CEPH_CAP_GSHARED, need to revoke it if next state is LOCK_LOCK | |
1690 | eval_gather(lock, lock->get_state() != LOCK_XLOCKSNAP, pneed_issue); | |
1691 | } | |
1692 | ||
1693 | void Locker::xlock_finish(SimpleLock *lock, MutationImpl *mut, bool *pneed_issue) | |
1694 | { | |
1695 | if (lock->get_type() == CEPH_LOCK_IVERSION || | |
1696 | lock->get_type() == CEPH_LOCK_DVERSION) | |
1697 | return local_xlock_finish(static_cast<LocalLock*>(lock), mut); | |
1698 | ||
1699 | dout(10) << "xlock_finish on " << *lock << " " << *lock->get_parent() << dendl; | |
1700 | ||
1701 | client_t xlocker = lock->get_xlock_by_client(); | |
1702 | ||
1703 | // drop ref | |
1704 | lock->put_xlock(); | |
1705 | assert(mut); | |
1706 | mut->xlocks.erase(lock); | |
1707 | mut->locks.erase(lock); | |
1708 | ||
1709 | bool do_issue = false; | |
1710 | ||
1711 | // remote xlock? | |
1712 | if (!lock->get_parent()->is_auth()) { | |
1713 | assert(lock->get_sm()->can_remote_xlock); | |
1714 | ||
1715 | // tell auth | |
1716 | dout(7) << "xlock_finish releasing remote xlock on " << *lock->get_parent() << dendl; | |
1717 | mds_rank_t auth = lock->get_parent()->authority().first; | |
1718 | if (!mds->is_cluster_degraded() || | |
1719 | mds->mdsmap->get_state(auth) >= MDSMap::STATE_REJOIN) { | |
1720 | MMDSSlaveRequest *slavereq = new MMDSSlaveRequest(mut->reqid, mut->attempt, | |
1721 | MMDSSlaveRequest::OP_UNXLOCK); | |
1722 | slavereq->set_lock_type(lock->get_type()); | |
1723 | lock->get_parent()->set_object_info(slavereq->get_object_info()); | |
1724 | mds->send_message_mds(slavereq, auth); | |
1725 | } | |
1726 | // others waiting? | |
1727 | lock->finish_waiters(SimpleLock::WAIT_STABLE | | |
1728 | SimpleLock::WAIT_WR | | |
1729 | SimpleLock::WAIT_RD, 0); | |
1730 | } else { | |
1731 | if (lock->get_num_xlocks() == 0) { | |
1732 | if (lock->get_state() == LOCK_LOCK_XLOCK) | |
1733 | lock->set_state(LOCK_XLOCKDONE); | |
1734 | _finish_xlock(lock, xlocker, &do_issue); | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | if (do_issue) { | |
1739 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
1740 | if (in->is_head()) { | |
1741 | if (pneed_issue) | |
1742 | *pneed_issue = true; | |
1743 | else | |
1744 | issue_caps(in); | |
1745 | } | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | void Locker::xlock_export(SimpleLock *lock, MutationImpl *mut) | |
1750 | { | |
1751 | dout(10) << "xlock_export on " << *lock << " " << *lock->get_parent() << dendl; | |
1752 | ||
1753 | lock->put_xlock(); | |
1754 | mut->xlocks.erase(lock); | |
1755 | mut->locks.erase(lock); | |
1756 | ||
1757 | MDSCacheObject *p = lock->get_parent(); | |
1758 | assert(p->state_test(CInode::STATE_AMBIGUOUSAUTH)); // we are exporting this (inode) | |
1759 | ||
1760 | if (!lock->is_stable()) | |
1761 | lock->get_parent()->auth_unpin(lock); | |
1762 | ||
1763 | lock->set_state(LOCK_LOCK); | |
1764 | } | |
1765 | ||
1766 | void Locker::xlock_import(SimpleLock *lock) | |
1767 | { | |
1768 | dout(10) << "xlock_import on " << *lock << " " << *lock->get_parent() << dendl; | |
1769 | lock->get_parent()->auth_pin(lock); | |
1770 | } | |
1771 | ||
1772 | ||
1773 | ||
1774 | // file i/o ----------------------------------------- | |
1775 | ||
1776 | version_t Locker::issue_file_data_version(CInode *in) | |
1777 | { | |
1778 | dout(7) << "issue_file_data_version on " << *in << dendl; | |
1779 | return in->inode.file_data_version; | |
1780 | } | |
1781 | ||
1782 | class C_Locker_FileUpdate_finish : public LockerLogContext { | |
1783 | CInode *in; | |
1784 | MutationRef mut; | |
1785 | bool share_max; | |
1786 | bool need_issue; | |
1787 | client_t client; | |
1788 | MClientCaps *ack; | |
1789 | public: | |
1790 | C_Locker_FileUpdate_finish(Locker *l, CInode *i, MutationRef& m, | |
1791 | bool sm=false, bool ni=false, client_t c=-1, | |
1792 | MClientCaps *ac = 0) | |
1793 | : LockerLogContext(l), in(i), mut(m), share_max(sm), need_issue(ni), | |
1794 | client(c), ack(ac) { | |
1795 | in->get(CInode::PIN_PTRWAITER); | |
1796 | } | |
1797 | void finish(int r) override { | |
1798 | locker->file_update_finish(in, mut, share_max, need_issue, client, ack); | |
1799 | in->put(CInode::PIN_PTRWAITER); | |
1800 | } | |
1801 | }; | |
1802 | ||
1803 | void Locker::file_update_finish(CInode *in, MutationRef& mut, bool share_max, bool issue_client_cap, | |
1804 | client_t client, MClientCaps *ack) | |
1805 | { | |
1806 | dout(10) << "file_update_finish on " << *in << dendl; | |
1807 | in->pop_and_dirty_projected_inode(mut->ls); | |
1808 | ||
1809 | mut->apply(); | |
1810 | ||
1811 | if (ack) { | |
1812 | Session *session = mds->get_session(client); | |
1813 | if (session) { | |
1814 | // "oldest flush tid" > 0 means client uses unique TID for each flush | |
1815 | if (ack->get_oldest_flush_tid() > 0) | |
1816 | session->add_completed_flush(ack->get_client_tid()); | |
1817 | mds->send_message_client_counted(ack, session); | |
1818 | } else { | |
1819 | dout(10) << " no session for client." << client << " " << *ack << dendl; | |
1820 | ack->put(); | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | set<CInode*> need_issue; | |
1825 | drop_locks(mut.get(), &need_issue); | |
1826 | ||
1827 | if (!in->is_head() && !in->client_snap_caps.empty()) { | |
1828 | dout(10) << " client_snap_caps " << in->client_snap_caps << dendl; | |
1829 | // check for snap writeback completion | |
1830 | bool gather = false; | |
1831 | compact_map<int,set<client_t> >::iterator p = in->client_snap_caps.begin(); | |
1832 | while (p != in->client_snap_caps.end()) { | |
1833 | SimpleLock *lock = in->get_lock(p->first); | |
1834 | assert(lock); | |
1835 | dout(10) << " completing client_snap_caps for " << ccap_string(p->first) | |
1836 | << " lock " << *lock << " on " << *in << dendl; | |
1837 | lock->put_wrlock(); | |
1838 | ||
1839 | p->second.erase(client); | |
1840 | if (p->second.empty()) { | |
1841 | gather = true; | |
1842 | in->client_snap_caps.erase(p++); | |
1843 | } else | |
1844 | ++p; | |
1845 | } | |
1846 | if (gather) { | |
1847 | if (in->client_snap_caps.empty()) | |
1848 | in->item_open_file.remove_myself(); | |
1849 | eval_cap_gather(in, &need_issue); | |
1850 | } | |
1851 | } else { | |
1852 | if (issue_client_cap && need_issue.count(in) == 0) { | |
1853 | Capability *cap = in->get_client_cap(client); | |
1854 | if (cap && (cap->wanted() & ~cap->pending())) | |
1855 | issue_caps(in, cap); | |
1856 | } | |
1857 | ||
1858 | if (share_max && in->is_auth() && | |
1859 | (in->filelock.gcaps_allowed(CAP_LONER) & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER))) | |
1860 | share_inode_max_size(in); | |
1861 | } | |
1862 | issue_caps_set(need_issue); | |
1863 | ||
1864 | // auth unpin after issuing caps | |
1865 | mut->cleanup(); | |
1866 | } | |
1867 | ||
1868 | Capability* Locker::issue_new_caps(CInode *in, | |
1869 | int mode, | |
1870 | Session *session, | |
1871 | SnapRealm *realm, | |
1872 | bool is_replay) | |
1873 | { | |
1874 | dout(7) << "issue_new_caps for mode " << mode << " on " << *in << dendl; | |
1875 | bool is_new; | |
1876 | ||
1877 | // if replay, try to reconnect cap, and otherwise do nothing. | |
1878 | if (is_replay) { | |
1879 | mds->mdcache->try_reconnect_cap(in, session); | |
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | // my needs | |
1884 | assert(session->info.inst.name.is_client()); | |
31f18b77 | 1885 | client_t my_client = session->info.inst.name.num(); |
7c673cae FG |
1886 | int my_want = ceph_caps_for_mode(mode); |
1887 | ||
1888 | // register a capability | |
1889 | Capability *cap = in->get_client_cap(my_client); | |
1890 | if (!cap) { | |
1891 | // new cap | |
1892 | cap = in->add_client_cap(my_client, session, realm); | |
1893 | cap->set_wanted(my_want); | |
1894 | cap->mark_new(); | |
1895 | cap->inc_suppress(); // suppress file cap messages for new cap (we'll bundle with the open() reply) | |
1896 | is_new = true; | |
1897 | } else { | |
1898 | is_new = false; | |
1899 | // make sure it wants sufficient caps | |
1900 | if (my_want & ~cap->wanted()) { | |
1901 | // augment wanted caps for this client | |
1902 | cap->set_wanted(cap->wanted() | my_want); | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | if (in->is_auth()) { | |
1907 | // [auth] twiddle mode? | |
1908 | eval(in, CEPH_CAP_LOCKS); | |
1909 | ||
1910 | if (_need_flush_mdlog(in, my_want)) | |
1911 | mds->mdlog->flush(); | |
1912 | ||
1913 | } else { | |
1914 | // [replica] tell auth about any new caps wanted | |
1915 | request_inode_file_caps(in); | |
1916 | } | |
1917 | ||
1918 | // issue caps (pot. incl new one) | |
1919 | //issue_caps(in); // note: _eval above may have done this already... | |
1920 | ||
1921 | // re-issue whatever we can | |
1922 | //cap->issue(cap->pending()); | |
1923 | ||
1924 | if (is_new) | |
1925 | cap->dec_suppress(); | |
1926 | ||
1927 | return cap; | |
1928 | } | |
1929 | ||
1930 | ||
1931 | void Locker::issue_caps_set(set<CInode*>& inset) | |
1932 | { | |
1933 | for (set<CInode*>::iterator p = inset.begin(); p != inset.end(); ++p) | |
1934 | issue_caps(*p); | |
1935 | } | |
1936 | ||
1937 | bool Locker::issue_caps(CInode *in, Capability *only_cap) | |
1938 | { | |
1939 | // allowed caps are determined by the lock mode. | |
1940 | int all_allowed = in->get_caps_allowed_by_type(CAP_ANY); | |
1941 | int loner_allowed = in->get_caps_allowed_by_type(CAP_LONER); | |
1942 | int xlocker_allowed = in->get_caps_allowed_by_type(CAP_XLOCKER); | |
1943 | ||
1944 | client_t loner = in->get_loner(); | |
1945 | if (loner >= 0) { | |
1946 | dout(7) << "issue_caps loner client." << loner | |
1947 | << " allowed=" << ccap_string(loner_allowed) | |
1948 | << ", xlocker allowed=" << ccap_string(xlocker_allowed) | |
1949 | << ", others allowed=" << ccap_string(all_allowed) | |
1950 | << " on " << *in << dendl; | |
1951 | } else { | |
1952 | dout(7) << "issue_caps allowed=" << ccap_string(all_allowed) | |
1953 | << ", xlocker allowed=" << ccap_string(xlocker_allowed) | |
1954 | << " on " << *in << dendl; | |
1955 | } | |
1956 | ||
1957 | assert(in->is_head()); | |
1958 | ||
1959 | // count conflicts with | |
1960 | int nissued = 0; | |
1961 | ||
1962 | // client caps | |
1963 | map<client_t, Capability*>::iterator it; | |
1964 | if (only_cap) | |
1965 | it = in->client_caps.find(only_cap->get_client()); | |
1966 | else | |
1967 | it = in->client_caps.begin(); | |
1968 | for (; it != in->client_caps.end(); ++it) { | |
1969 | Capability *cap = it->second; | |
1970 | if (cap->is_stale()) | |
1971 | continue; | |
1972 | ||
1973 | // do not issue _new_ bits when size|mtime is projected | |
1974 | int allowed; | |
1975 | if (loner == it->first) | |
1976 | allowed = loner_allowed; | |
1977 | else | |
1978 | allowed = all_allowed; | |
1979 | ||
1980 | // add in any xlocker-only caps (for locks this client is the xlocker for) | |
1981 | allowed |= xlocker_allowed & in->get_xlocker_mask(it->first); | |
1982 | ||
1983 | Session *session = mds->get_session(it->first); | |
1984 | if (in->inode.inline_data.version != CEPH_INLINE_NONE && | |
1985 | !(session && session->connection && | |
1986 | session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA))) | |
1987 | allowed &= ~(CEPH_CAP_FILE_RD | CEPH_CAP_FILE_WR); | |
1988 | ||
1989 | int pending = cap->pending(); | |
1990 | int wanted = cap->wanted(); | |
1991 | ||
1992 | dout(20) << " client." << it->first | |
1993 | << " pending " << ccap_string(pending) | |
1994 | << " allowed " << ccap_string(allowed) | |
1995 | << " wanted " << ccap_string(wanted) | |
1996 | << dendl; | |
1997 | ||
1998 | if (!(pending & ~allowed)) { | |
1999 | // skip if suppress or new, and not revocation | |
2000 | if (cap->is_new() || cap->is_suppress()) { | |
2001 | dout(20) << " !revoke and new|suppressed, skipping client." << it->first << dendl; | |
2002 | continue; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | // notify clients about deleted inode, to make sure they release caps ASAP. | |
2007 | if (in->inode.nlink == 0) | |
2008 | wanted |= CEPH_CAP_LINK_SHARED; | |
2009 | ||
2010 | // are there caps that the client _wants_ and can have, but aren't pending? | |
2011 | // or do we need to revoke? | |
2012 | if (((wanted & allowed) & ~pending) || // missing wanted+allowed caps | |
2013 | (pending & ~allowed)) { // need to revoke ~allowed caps. | |
2014 | // issue | |
2015 | nissued++; | |
2016 | ||
2017 | // include caps that clients generally like, while we're at it. | |
2018 | int likes = in->get_caps_liked(); | |
2019 | int before = pending; | |
2020 | long seq; | |
2021 | if (pending & ~allowed) | |
2022 | seq = cap->issue((wanted|likes) & allowed & pending); // if revoking, don't issue anything new. | |
2023 | else | |
2024 | seq = cap->issue((wanted|likes) & allowed); | |
2025 | int after = cap->pending(); | |
2026 | ||
2027 | if (cap->is_new()) { | |
2028 | // haven't send caps to client yet | |
2029 | if (before & ~after) | |
2030 | cap->confirm_receipt(seq, after); | |
2031 | } else { | |
2032 | dout(7) << " sending MClientCaps to client." << it->first | |
2033 | << " seq " << cap->get_last_seq() | |
2034 | << " new pending " << ccap_string(after) << " was " << ccap_string(before) | |
2035 | << dendl; | |
2036 | ||
2037 | int op = (before & ~after) ? CEPH_CAP_OP_REVOKE : CEPH_CAP_OP_GRANT; | |
2038 | if (op == CEPH_CAP_OP_REVOKE) { | |
2039 | revoking_caps.push_back(&cap->item_revoking_caps); | |
2040 | revoking_caps_by_client[cap->get_client()].push_back(&cap->item_client_revoking_caps); | |
2041 | cap->set_last_revoke_stamp(ceph_clock_now()); | |
2042 | cap->reset_num_revoke_warnings(); | |
2043 | } | |
2044 | ||
2045 | MClientCaps *m = new MClientCaps(op, in->ino(), | |
2046 | in->find_snaprealm()->inode->ino(), | |
2047 | cap->get_cap_id(), cap->get_last_seq(), | |
2048 | after, wanted, 0, | |
2049 | cap->get_mseq(), | |
2050 | mds->get_osd_epoch_barrier()); | |
2051 | in->encode_cap_message(m, cap); | |
2052 | ||
2053 | mds->send_message_client_counted(m, it->first); | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | if (only_cap) | |
2058 | break; | |
2059 | } | |
2060 | ||
2061 | return (nissued == 0); // true if no re-issued, no callbacks | |
2062 | } | |
2063 | ||
2064 | void Locker::issue_truncate(CInode *in) | |
2065 | { | |
2066 | dout(7) << "issue_truncate on " << *in << dendl; | |
2067 | ||
2068 | for (map<client_t, Capability*>::iterator it = in->client_caps.begin(); | |
2069 | it != in->client_caps.end(); | |
2070 | ++it) { | |
2071 | Capability *cap = it->second; | |
2072 | MClientCaps *m = new MClientCaps(CEPH_CAP_OP_TRUNC, | |
2073 | in->ino(), | |
2074 | in->find_snaprealm()->inode->ino(), | |
2075 | cap->get_cap_id(), cap->get_last_seq(), | |
2076 | cap->pending(), cap->wanted(), 0, | |
2077 | cap->get_mseq(), | |
2078 | mds->get_osd_epoch_barrier()); | |
2079 | in->encode_cap_message(m, cap); | |
2080 | mds->send_message_client_counted(m, it->first); | |
2081 | } | |
2082 | ||
2083 | // should we increase max_size? | |
2084 | if (in->is_auth() && in->is_file()) | |
2085 | check_inode_max_size(in); | |
2086 | } | |
2087 | ||
2088 | ||
2089 | void Locker::revoke_stale_caps(Capability *cap) | |
2090 | { | |
2091 | CInode *in = cap->get_inode(); | |
2092 | if (in->state_test(CInode::STATE_EXPORTINGCAPS)) { | |
2093 | // if export succeeds, the cap will be removed. if export fails, we need to | |
2094 | // revoke the cap if it's still stale. | |
2095 | in->state_set(CInode::STATE_EVALSTALECAPS); | |
2096 | return; | |
2097 | } | |
2098 | ||
2099 | int issued = cap->issued(); | |
2100 | if (issued & ~CEPH_CAP_PIN) { | |
2101 | dout(10) << " revoking " << ccap_string(issued) << " on " << *in << dendl; | |
2102 | cap->revoke(); | |
2103 | ||
2104 | if (in->is_auth() && | |
2105 | in->inode.client_ranges.count(cap->get_client())) | |
2106 | in->state_set(CInode::STATE_NEEDSRECOVER); | |
2107 | ||
2108 | if (!in->filelock.is_stable()) eval_gather(&in->filelock); | |
2109 | if (!in->linklock.is_stable()) eval_gather(&in->linklock); | |
2110 | if (!in->authlock.is_stable()) eval_gather(&in->authlock); | |
2111 | if (!in->xattrlock.is_stable()) eval_gather(&in->xattrlock); | |
2112 | ||
2113 | if (in->is_auth()) { | |
2114 | try_eval(in, CEPH_CAP_LOCKS); | |
2115 | } else { | |
2116 | request_inode_file_caps(in); | |
2117 | } | |
2118 | } | |
2119 | } | |
2120 | ||
2121 | void Locker::revoke_stale_caps(Session *session) | |
2122 | { | |
2123 | dout(10) << "revoke_stale_caps for " << session->info.inst.name << dendl; | |
2124 | ||
2125 | for (xlist<Capability*>::iterator p = session->caps.begin(); !p.end(); ++p) { | |
2126 | Capability *cap = *p; | |
2127 | cap->mark_stale(); | |
2128 | revoke_stale_caps(cap); | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | void Locker::resume_stale_caps(Session *session) | |
2133 | { | |
2134 | dout(10) << "resume_stale_caps for " << session->info.inst.name << dendl; | |
2135 | ||
2136 | for (xlist<Capability*>::iterator p = session->caps.begin(); !p.end(); ++p) { | |
2137 | Capability *cap = *p; | |
2138 | CInode *in = cap->get_inode(); | |
2139 | assert(in->is_head()); | |
2140 | if (cap->is_stale()) { | |
2141 | dout(10) << " clearing stale flag on " << *in << dendl; | |
2142 | cap->clear_stale(); | |
2143 | ||
2144 | if (in->state_test(CInode::STATE_EXPORTINGCAPS)) { | |
2145 | // if export succeeds, the cap will be removed. if export fails, | |
2146 | // we need to re-issue the cap if it's not stale. | |
2147 | in->state_set(CInode::STATE_EVALSTALECAPS); | |
2148 | continue; | |
2149 | } | |
2150 | ||
2151 | if (!in->is_auth() || !eval(in, CEPH_CAP_LOCKS)) | |
2152 | issue_caps(in, cap); | |
2153 | } | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | void Locker::remove_stale_leases(Session *session) | |
2158 | { | |
2159 | dout(10) << "remove_stale_leases for " << session->info.inst.name << dendl; | |
2160 | xlist<ClientLease*>::iterator p = session->leases.begin(); | |
2161 | while (!p.end()) { | |
2162 | ClientLease *l = *p; | |
2163 | ++p; | |
2164 | CDentry *parent = static_cast<CDentry*>(l->parent); | |
2165 | dout(15) << " removing lease on " << *parent << dendl; | |
2166 | parent->remove_client_lease(l, this); | |
2167 | } | |
2168 | } | |
2169 | ||
2170 | ||
2171 | class C_MDL_RequestInodeFileCaps : public LockerContext { | |
2172 | CInode *in; | |
2173 | public: | |
2174 | C_MDL_RequestInodeFileCaps(Locker *l, CInode *i) : LockerContext(l), in(i) { | |
2175 | in->get(CInode::PIN_PTRWAITER); | |
2176 | } | |
2177 | void finish(int r) override { | |
2178 | if (!in->is_auth()) | |
2179 | locker->request_inode_file_caps(in); | |
2180 | in->put(CInode::PIN_PTRWAITER); | |
2181 | } | |
2182 | }; | |
2183 | ||
2184 | void Locker::request_inode_file_caps(CInode *in) | |
2185 | { | |
2186 | assert(!in->is_auth()); | |
2187 | ||
2188 | int wanted = in->get_caps_wanted() & ~CEPH_CAP_PIN; | |
2189 | if (wanted != in->replica_caps_wanted) { | |
2190 | // wait for single auth | |
2191 | if (in->is_ambiguous_auth()) { | |
2192 | in->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, | |
2193 | new C_MDL_RequestInodeFileCaps(this, in)); | |
2194 | return; | |
2195 | } | |
2196 | ||
2197 | mds_rank_t auth = in->authority().first; | |
2198 | if (mds->is_cluster_degraded() && | |
2199 | mds->mdsmap->get_state(auth) == MDSMap::STATE_REJOIN) { | |
2200 | mds->wait_for_active_peer(auth, new C_MDL_RequestInodeFileCaps(this, in)); | |
2201 | return; | |
2202 | } | |
2203 | ||
2204 | dout(7) << "request_inode_file_caps " << ccap_string(wanted) | |
2205 | << " was " << ccap_string(in->replica_caps_wanted) | |
2206 | << " on " << *in << " to mds." << auth << dendl; | |
2207 | ||
2208 | in->replica_caps_wanted = wanted; | |
2209 | ||
2210 | if (!mds->is_cluster_degraded() || | |
2211 | mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) | |
2212 | mds->send_message_mds(new MInodeFileCaps(in->ino(), in->replica_caps_wanted), | |
2213 | auth); | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | /* This function DOES put the passed message before returning */ | |
2218 | void Locker::handle_inode_file_caps(MInodeFileCaps *m) | |
2219 | { | |
2220 | // nobody should be talking to us during recovery. | |
2221 | assert(mds->is_clientreplay() || mds->is_active() || mds->is_stopping()); | |
2222 | ||
2223 | // ok | |
2224 | CInode *in = mdcache->get_inode(m->get_ino()); | |
2225 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
2226 | ||
2227 | assert(in); | |
2228 | assert(in->is_auth()); | |
2229 | ||
2230 | dout(7) << "handle_inode_file_caps replica mds." << from << " wants caps " << ccap_string(m->get_caps()) << " on " << *in << dendl; | |
2231 | ||
2232 | if (m->get_caps()) | |
2233 | in->mds_caps_wanted[from] = m->get_caps(); | |
2234 | else | |
2235 | in->mds_caps_wanted.erase(from); | |
2236 | ||
2237 | try_eval(in, CEPH_CAP_LOCKS); | |
2238 | m->put(); | |
2239 | } | |
2240 | ||
2241 | ||
2242 | class C_MDL_CheckMaxSize : public LockerContext { | |
2243 | CInode *in; | |
2244 | uint64_t new_max_size; | |
2245 | uint64_t newsize; | |
2246 | utime_t mtime; | |
2247 | ||
2248 | public: | |
2249 | C_MDL_CheckMaxSize(Locker *l, CInode *i, uint64_t _new_max_size, | |
2250 | uint64_t _newsize, utime_t _mtime) : | |
2251 | LockerContext(l), in(i), | |
2252 | new_max_size(_new_max_size), newsize(_newsize), mtime(_mtime) | |
2253 | { | |
2254 | in->get(CInode::PIN_PTRWAITER); | |
2255 | } | |
2256 | void finish(int r) override { | |
2257 | if (in->is_auth()) | |
2258 | locker->check_inode_max_size(in, false, new_max_size, newsize, mtime); | |
2259 | in->put(CInode::PIN_PTRWAITER); | |
2260 | } | |
2261 | }; | |
2262 | ||
31f18b77 FG |
2263 | uint64_t Locker::calc_new_max_size(inode_t *pi, uint64_t size) |
2264 | { | |
2265 | uint64_t new_max = (size + 1) << 1; | |
2266 | uint64_t max_inc = g_conf->mds_client_writeable_range_max_inc_objs; | |
2267 | if (max_inc > 0) { | |
2268 | max_inc *= pi->get_layout_size_increment(); | |
2269 | new_max = MIN(new_max, size + max_inc); | |
2270 | } | |
2271 | return ROUND_UP_TO(new_max, pi->get_layout_size_increment()); | |
2272 | } | |
7c673cae FG |
2273 | |
2274 | void Locker::calc_new_client_ranges(CInode *in, uint64_t size, | |
2275 | map<client_t,client_writeable_range_t> *new_ranges, | |
2276 | bool *max_increased) | |
2277 | { | |
2278 | inode_t *latest = in->get_projected_inode(); | |
2279 | uint64_t ms; | |
2280 | if(latest->has_layout()) { | |
31f18b77 | 2281 | ms = calc_new_max_size(latest, size); |
7c673cae FG |
2282 | } else { |
2283 | // Layout-less directories like ~mds0/, have zero size | |
2284 | ms = 0; | |
2285 | } | |
2286 | ||
2287 | // increase ranges as appropriate. | |
2288 | // shrink to 0 if no WR|BUFFER caps issued. | |
2289 | for (map<client_t,Capability*>::iterator p = in->client_caps.begin(); | |
2290 | p != in->client_caps.end(); | |
2291 | ++p) { | |
2292 | if ((p->second->issued() | p->second->wanted()) & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER)) { | |
2293 | client_writeable_range_t& nr = (*new_ranges)[p->first]; | |
2294 | nr.range.first = 0; | |
2295 | if (latest->client_ranges.count(p->first)) { | |
2296 | client_writeable_range_t& oldr = latest->client_ranges[p->first]; | |
2297 | if (ms > oldr.range.last) | |
2298 | *max_increased = true; | |
2299 | nr.range.last = MAX(ms, oldr.range.last); | |
2300 | nr.follows = oldr.follows; | |
2301 | } else { | |
31f18b77 | 2302 | *max_increased = true; |
7c673cae FG |
2303 | nr.range.last = ms; |
2304 | nr.follows = in->first - 1; | |
2305 | } | |
2306 | } | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | bool Locker::check_inode_max_size(CInode *in, bool force_wrlock, | |
2311 | uint64_t new_max_size, uint64_t new_size, | |
2312 | utime_t new_mtime) | |
2313 | { | |
2314 | assert(in->is_auth()); | |
2315 | assert(in->is_file()); | |
2316 | ||
2317 | inode_t *latest = in->get_projected_inode(); | |
2318 | map<client_t, client_writeable_range_t> new_ranges; | |
2319 | uint64_t size = latest->size; | |
2320 | bool update_size = new_size > 0; | |
2321 | bool update_max = false; | |
2322 | bool max_increased = false; | |
2323 | ||
2324 | if (update_size) { | |
2325 | new_size = size = MAX(size, new_size); | |
2326 | new_mtime = MAX(new_mtime, latest->mtime); | |
2327 | if (latest->size == new_size && latest->mtime == new_mtime) | |
2328 | update_size = false; | |
2329 | } | |
2330 | ||
2331 | calc_new_client_ranges(in, max(new_max_size, size), &new_ranges, &max_increased); | |
2332 | ||
2333 | if (max_increased || latest->client_ranges != new_ranges) | |
2334 | update_max = true; | |
2335 | ||
2336 | if (!update_size && !update_max) { | |
2337 | dout(20) << "check_inode_max_size no-op on " << *in << dendl; | |
2338 | return false; | |
2339 | } | |
2340 | ||
2341 | dout(10) << "check_inode_max_size new_ranges " << new_ranges | |
2342 | << " update_size " << update_size | |
2343 | << " on " << *in << dendl; | |
2344 | ||
2345 | if (in->is_frozen()) { | |
2346 | dout(10) << "check_inode_max_size frozen, waiting on " << *in << dendl; | |
2347 | C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in, | |
2348 | new_max_size, | |
2349 | new_size, | |
2350 | new_mtime); | |
2351 | in->add_waiter(CInode::WAIT_UNFREEZE, cms); | |
2352 | return false; | |
2353 | } | |
2354 | if (!force_wrlock && !in->filelock.can_wrlock(in->get_loner())) { | |
2355 | // lock? | |
2356 | if (in->filelock.is_stable()) { | |
2357 | if (in->get_target_loner() >= 0) | |
2358 | file_excl(&in->filelock); | |
2359 | else | |
2360 | simple_lock(&in->filelock); | |
2361 | } | |
2362 | if (!in->filelock.can_wrlock(in->get_loner())) { | |
2363 | // try again later | |
2364 | C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in, | |
2365 | new_max_size, | |
2366 | new_size, | |
2367 | new_mtime); | |
2368 | ||
2369 | in->filelock.add_waiter(SimpleLock::WAIT_STABLE, cms); | |
2370 | dout(10) << "check_inode_max_size can't wrlock, waiting on " << *in << dendl; | |
2371 | return false; | |
2372 | } | |
2373 | } | |
2374 | ||
2375 | MutationRef mut(new MutationImpl()); | |
2376 | mut->ls = mds->mdlog->get_current_segment(); | |
2377 | ||
2378 | inode_t *pi = in->project_inode(); | |
2379 | pi->version = in->pre_dirty(); | |
2380 | ||
2381 | if (update_max) { | |
2382 | dout(10) << "check_inode_max_size client_ranges " << pi->client_ranges << " -> " << new_ranges << dendl; | |
2383 | pi->client_ranges = new_ranges; | |
2384 | } | |
2385 | ||
2386 | if (update_size) { | |
2387 | dout(10) << "check_inode_max_size size " << pi->size << " -> " << new_size << dendl; | |
2388 | pi->size = new_size; | |
2389 | pi->rstat.rbytes = new_size; | |
2390 | dout(10) << "check_inode_max_size mtime " << pi->mtime << " -> " << new_mtime << dendl; | |
2391 | pi->mtime = new_mtime; | |
2392 | } | |
2393 | ||
2394 | // use EOpen if the file is still open; otherwise, use EUpdate. | |
2395 | // this is just an optimization to push open files forward into | |
2396 | // newer log segments. | |
2397 | LogEvent *le; | |
2398 | EMetaBlob *metablob; | |
2399 | if (in->is_any_caps_wanted() && in->last == CEPH_NOSNAP) { | |
2400 | EOpen *eo = new EOpen(mds->mdlog); | |
2401 | eo->add_ino(in->ino()); | |
2402 | metablob = &eo->metablob; | |
2403 | le = eo; | |
2404 | mut->ls->open_files.push_back(&in->item_open_file); | |
2405 | } else { | |
2406 | EUpdate *eu = new EUpdate(mds->mdlog, "check_inode_max_size"); | |
2407 | metablob = &eu->metablob; | |
2408 | le = eu; | |
2409 | } | |
2410 | mds->mdlog->start_entry(le); | |
2411 | if (update_size) { // FIXME if/when we do max_size nested accounting | |
2412 | mdcache->predirty_journal_parents(mut, metablob, in, 0, PREDIRTY_PRIMARY); | |
2413 | // no cow, here! | |
2414 | CDentry *parent = in->get_projected_parent_dn(); | |
2415 | metablob->add_primary_dentry(parent, in, true); | |
2416 | } else { | |
2417 | metablob->add_dir_context(in->get_projected_parent_dn()->get_dir()); | |
2418 | mdcache->journal_dirty_inode(mut.get(), metablob, in); | |
2419 | } | |
2420 | mds->mdlog->submit_entry(le, | |
2421 | new C_Locker_FileUpdate_finish(this, in, mut, true)); | |
2422 | wrlock_force(&in->filelock, mut); // wrlock for duration of journal | |
2423 | mut->auth_pin(in); | |
2424 | ||
2425 | // make max_size _increase_ timely | |
2426 | if (max_increased) | |
2427 | mds->mdlog->flush(); | |
2428 | ||
2429 | return true; | |
2430 | } | |
2431 | ||
2432 | ||
2433 | void Locker::share_inode_max_size(CInode *in, Capability *only_cap) | |
2434 | { | |
2435 | /* | |
2436 | * only share if currently issued a WR cap. if client doesn't have it, | |
2437 | * file_max doesn't matter, and the client will get it if/when they get | |
2438 | * the cap later. | |
2439 | */ | |
2440 | dout(10) << "share_inode_max_size on " << *in << dendl; | |
2441 | map<client_t, Capability*>::iterator it; | |
2442 | if (only_cap) | |
2443 | it = in->client_caps.find(only_cap->get_client()); | |
2444 | else | |
2445 | it = in->client_caps.begin(); | |
2446 | for (; it != in->client_caps.end(); ++it) { | |
2447 | const client_t client = it->first; | |
2448 | Capability *cap = it->second; | |
2449 | if (cap->is_suppress()) | |
2450 | continue; | |
2451 | if (cap->pending() & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER)) { | |
2452 | dout(10) << "share_inode_max_size with client." << client << dendl; | |
2453 | cap->inc_last_seq(); | |
2454 | MClientCaps *m = new MClientCaps(CEPH_CAP_OP_GRANT, | |
2455 | in->ino(), | |
2456 | in->find_snaprealm()->inode->ino(), | |
2457 | cap->get_cap_id(), cap->get_last_seq(), | |
2458 | cap->pending(), cap->wanted(), 0, | |
2459 | cap->get_mseq(), | |
2460 | mds->get_osd_epoch_barrier()); | |
2461 | in->encode_cap_message(m, cap); | |
2462 | mds->send_message_client_counted(m, client); | |
2463 | } | |
2464 | if (only_cap) | |
2465 | break; | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | bool Locker::_need_flush_mdlog(CInode *in, int wanted) | |
2470 | { | |
2471 | /* flush log if caps are wanted by client but corresponding lock is unstable and locked by | |
2472 | * pending mutations. */ | |
2473 | if (((wanted & (CEPH_CAP_FILE_RD|CEPH_CAP_FILE_WR|CEPH_CAP_FILE_SHARED|CEPH_CAP_FILE_EXCL)) && | |
2474 | in->filelock.is_unstable_and_locked()) || | |
2475 | ((wanted & (CEPH_CAP_AUTH_SHARED|CEPH_CAP_AUTH_EXCL)) && | |
2476 | in->authlock.is_unstable_and_locked()) || | |
2477 | ((wanted & (CEPH_CAP_LINK_SHARED|CEPH_CAP_LINK_EXCL)) && | |
2478 | in->linklock.is_unstable_and_locked()) || | |
2479 | ((wanted & (CEPH_CAP_XATTR_SHARED|CEPH_CAP_XATTR_EXCL)) && | |
2480 | in->xattrlock.is_unstable_and_locked())) | |
2481 | return true; | |
2482 | return false; | |
2483 | } | |
2484 | ||
2485 | void Locker::adjust_cap_wanted(Capability *cap, int wanted, int issue_seq) | |
2486 | { | |
2487 | if (ceph_seq_cmp(issue_seq, cap->get_last_issue()) == 0) { | |
2488 | dout(10) << " wanted " << ccap_string(cap->wanted()) | |
2489 | << " -> " << ccap_string(wanted) << dendl; | |
2490 | cap->set_wanted(wanted); | |
2491 | } else if (wanted & ~cap->wanted()) { | |
2492 | dout(10) << " wanted " << ccap_string(cap->wanted()) | |
2493 | << " -> " << ccap_string(wanted) | |
2494 | << " (added caps even though we had seq mismatch!)" << dendl; | |
2495 | cap->set_wanted(wanted | cap->wanted()); | |
2496 | } else { | |
2497 | dout(10) << " NOT changing wanted " << ccap_string(cap->wanted()) | |
2498 | << " -> " << ccap_string(wanted) | |
2499 | << " (issue_seq " << issue_seq << " != last_issue " | |
2500 | << cap->get_last_issue() << ")" << dendl; | |
2501 | return; | |
2502 | } | |
2503 | ||
2504 | CInode *cur = cap->get_inode(); | |
2505 | if (!cur->is_auth()) { | |
2506 | request_inode_file_caps(cur); | |
2507 | return; | |
2508 | } | |
2509 | ||
2510 | if (cap->wanted() == 0) { | |
2511 | if (cur->item_open_file.is_on_list() && | |
2512 | !cur->is_any_caps_wanted()) { | |
2513 | dout(10) << " removing unwanted file from open file list " << *cur << dendl; | |
2514 | cur->item_open_file.remove_myself(); | |
2515 | } | |
2516 | } else { | |
2517 | if (cur->state_test(CInode::STATE_RECOVERING) && | |
2518 | (cap->wanted() & (CEPH_CAP_FILE_RD | | |
2519 | CEPH_CAP_FILE_WR))) { | |
2520 | mds->mdcache->recovery_queue.prioritize(cur); | |
2521 | } | |
2522 | ||
2523 | if (!cur->item_open_file.is_on_list()) { | |
2524 | dout(10) << " adding to open file list " << *cur << dendl; | |
2525 | assert(cur->last == CEPH_NOSNAP); | |
2526 | LogSegment *ls = mds->mdlog->get_current_segment(); | |
2527 | EOpen *le = new EOpen(mds->mdlog); | |
2528 | mds->mdlog->start_entry(le); | |
2529 | le->add_clean_inode(cur); | |
2530 | ls->open_files.push_back(&cur->item_open_file); | |
2531 | mds->mdlog->submit_entry(le); | |
2532 | } | |
2533 | } | |
2534 | } | |
2535 | ||
2536 | ||
2537 | ||
c07f9fc5 | 2538 | void Locker::_do_null_snapflush(CInode *head_in, client_t client, snapid_t last) |
7c673cae FG |
2539 | { |
2540 | dout(10) << "_do_null_snapflush client." << client << " on " << *head_in << dendl; | |
c07f9fc5 FG |
2541 | for (auto p = head_in->client_need_snapflush.begin(); |
2542 | p != head_in->client_need_snapflush.end() && p->first < last; ) { | |
7c673cae FG |
2543 | snapid_t snapid = p->first; |
2544 | set<client_t>& clients = p->second; | |
2545 | ++p; // be careful, q loop below depends on this | |
2546 | ||
2547 | if (clients.count(client)) { | |
2548 | dout(10) << " doing async NULL snapflush on " << snapid << " from client." << client << dendl; | |
2549 | CInode *sin = mdcache->get_inode(head_in->ino(), snapid); | |
2550 | if (!sin) { | |
2551 | // hrm, look forward until we find the inode. | |
2552 | // (we can only look it up by the last snapid it is valid for) | |
2553 | dout(10) << " didn't have " << head_in->ino() << " snapid " << snapid << dendl; | |
2554 | for (compact_map<snapid_t, set<client_t> >::iterator q = p; // p is already at next entry | |
2555 | q != head_in->client_need_snapflush.end(); | |
2556 | ++q) { | |
2557 | dout(10) << " trying snapid " << q->first << dendl; | |
2558 | sin = mdcache->get_inode(head_in->ino(), q->first); | |
2559 | if (sin) { | |
2560 | assert(sin->first <= snapid); | |
2561 | break; | |
2562 | } | |
2563 | dout(10) << " didn't have " << head_in->ino() << " snapid " << q->first << dendl; | |
2564 | } | |
2565 | if (!sin && head_in->is_multiversion()) | |
2566 | sin = head_in; | |
2567 | assert(sin); | |
2568 | } | |
2569 | _do_snap_update(sin, snapid, 0, sin->first - 1, client, NULL, NULL); | |
2570 | head_in->remove_need_snapflush(sin, snapid, client); | |
2571 | } | |
2572 | } | |
2573 | } | |
2574 | ||
2575 | ||
2576 | bool Locker::should_defer_client_cap_frozen(CInode *in) | |
2577 | { | |
2578 | /* | |
2579 | * This policy needs to be AT LEAST as permissive as allowing a client request | |
2580 | * to go forward, or else a client request can release something, the release | |
2581 | * gets deferred, but the request gets processed and deadlocks because when the | |
2582 | * caps can't get revoked. | |
2583 | * | |
2584 | * Currently, a request wait if anything locked is freezing (can't | |
2585 | * auth_pin), which would avoid any deadlock with cap release. Thus @in | |
2586 | * _MUST_ be in the lock/auth_pin set. | |
2587 | * | |
2588 | * auth_pins==0 implies no unstable lock and not auth pinnned by | |
2589 | * client request, otherwise continue even it's freezing. | |
2590 | */ | |
2591 | return (in->is_freezing() && in->get_num_auth_pins() == 0) || in->is_frozen(); | |
2592 | } | |
2593 | ||
2594 | /* | |
2595 | * This function DOES put the passed message before returning | |
2596 | */ | |
2597 | void Locker::handle_client_caps(MClientCaps *m) | |
2598 | { | |
2599 | Session *session = static_cast<Session *>(m->get_connection()->get_priv()); | |
2600 | client_t client = m->get_source().num(); | |
2601 | ||
2602 | snapid_t follows = m->get_snap_follows(); | |
2603 | dout(7) << "handle_client_caps " | |
2604 | << ((m->flags & CLIENT_CAPS_SYNC) ? "sync" : "async") | |
2605 | << " on " << m->get_ino() | |
2606 | << " tid " << m->get_client_tid() << " follows " << follows | |
2607 | << " op " << ceph_cap_op_name(m->get_op()) << dendl; | |
2608 | ||
2609 | if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) { | |
2610 | if (!session) { | |
2611 | dout(5) << " no session, dropping " << *m << dendl; | |
2612 | m->put(); | |
2613 | return; | |
2614 | } | |
2615 | if (session->is_closed() || | |
2616 | session->is_closing() || | |
2617 | session->is_killing()) { | |
2618 | dout(7) << " session closed|closing|killing, dropping " << *m << dendl; | |
2619 | m->put(); | |
2620 | return; | |
2621 | } | |
2622 | if (mds->is_reconnect() && | |
2623 | m->get_dirty() && m->get_client_tid() > 0 && | |
2624 | !session->have_completed_flush(m->get_client_tid())) { | |
2625 | mdcache->set_reconnected_dirty_caps(client, m->get_ino(), m->get_dirty()); | |
2626 | } | |
2627 | mds->wait_for_replay(new C_MDS_RetryMessage(mds, m)); | |
2628 | return; | |
2629 | } | |
2630 | ||
2631 | if (m->get_client_tid() > 0 && session && | |
2632 | session->have_completed_flush(m->get_client_tid())) { | |
2633 | dout(7) << "handle_client_caps already flushed tid " << m->get_client_tid() | |
2634 | << " for client." << client << dendl; | |
2635 | MClientCaps *ack; | |
2636 | if (m->get_op() == CEPH_CAP_OP_FLUSHSNAP) { | |
2637 | ack = new MClientCaps(CEPH_CAP_OP_FLUSHSNAP_ACK, m->get_ino(), 0, 0, 0, 0, 0, | |
2638 | m->get_dirty(), 0, mds->get_osd_epoch_barrier()); | |
2639 | } else { | |
2640 | ack = new MClientCaps(CEPH_CAP_OP_FLUSH_ACK, m->get_ino(), 0, m->get_cap_id(), | |
2641 | m->get_seq(), m->get_caps(), 0, m->get_dirty(), 0, | |
2642 | mds->get_osd_epoch_barrier()); | |
2643 | } | |
2644 | ack->set_snap_follows(follows); | |
2645 | ack->set_client_tid(m->get_client_tid()); | |
2646 | mds->send_message_client_counted(ack, m->get_connection()); | |
2647 | if (m->get_op() == CEPH_CAP_OP_FLUSHSNAP) { | |
2648 | m->put(); | |
2649 | return; | |
2650 | } else { | |
2651 | // fall-thru because the message may release some caps | |
2652 | m->clear_dirty(); | |
2653 | m->set_op(CEPH_CAP_OP_UPDATE); | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | // "oldest flush tid" > 0 means client uses unique TID for each flush | |
2658 | if (m->get_oldest_flush_tid() > 0 && session) { | |
2659 | if (session->trim_completed_flushes(m->get_oldest_flush_tid())) { | |
2660 | mds->mdlog->get_current_segment()->touched_sessions.insert(session->info.inst.name); | |
2661 | ||
2662 | if (session->get_num_trim_flushes_warnings() > 0 && | |
2663 | session->get_num_completed_flushes() * 2 < g_conf->mds_max_completed_flushes) | |
2664 | session->reset_num_trim_flushes_warnings(); | |
2665 | } else { | |
2666 | if (session->get_num_completed_flushes() >= | |
2667 | (g_conf->mds_max_completed_flushes << session->get_num_trim_flushes_warnings())) { | |
2668 | session->inc_num_trim_flushes_warnings(); | |
2669 | stringstream ss; | |
2670 | ss << "client." << session->get_client() << " does not advance its oldest_flush_tid (" | |
2671 | << m->get_oldest_flush_tid() << "), " | |
2672 | << session->get_num_completed_flushes() | |
2673 | << " completed flushes recorded in session"; | |
2674 | mds->clog->warn() << ss.str(); | |
2675 | dout(20) << __func__ << " " << ss.str() << dendl; | |
2676 | } | |
2677 | } | |
2678 | } | |
2679 | ||
2680 | CInode *head_in = mdcache->get_inode(m->get_ino()); | |
2681 | if (!head_in) { | |
2682 | if (mds->is_clientreplay()) { | |
2683 | dout(7) << "handle_client_caps on unknown ino " << m->get_ino() | |
2684 | << ", will try again after replayed client requests" << dendl; | |
2685 | mdcache->wait_replay_cap_reconnect(m->get_ino(), new C_MDS_RetryMessage(mds, m)); | |
2686 | return; | |
2687 | } | |
2688 | dout(1) << "handle_client_caps on unknown ino " << m->get_ino() << ", dropping" << dendl; | |
2689 | m->put(); | |
2690 | return; | |
2691 | } | |
2692 | ||
2693 | if (m->osd_epoch_barrier && !mds->objecter->have_map(m->osd_epoch_barrier)) { | |
2694 | // Pause RADOS operations until we see the required epoch | |
2695 | mds->objecter->set_epoch_barrier(m->osd_epoch_barrier); | |
2696 | } | |
2697 | ||
2698 | if (mds->get_osd_epoch_barrier() < m->osd_epoch_barrier) { | |
2699 | // Record the barrier so that we will retransmit it to clients | |
2700 | mds->set_osd_epoch_barrier(m->osd_epoch_barrier); | |
2701 | } | |
2702 | ||
2703 | CInode *in = head_in; | |
2704 | if (follows > 0) { | |
2705 | in = mdcache->pick_inode_snap(head_in, follows); | |
2706 | if (in != head_in) | |
2707 | dout(10) << " head inode " << *head_in << dendl; | |
2708 | } | |
2709 | dout(10) << " cap inode " << *in << dendl; | |
2710 | ||
2711 | Capability *cap = 0; | |
2712 | cap = in->get_client_cap(client); | |
2713 | if (!cap && in != head_in) | |
2714 | cap = head_in->get_client_cap(client); | |
2715 | if (!cap) { | |
2716 | dout(7) << "handle_client_caps no cap for client." << client << " on " << *in << dendl; | |
2717 | m->put(); | |
2718 | return; | |
2719 | } | |
2720 | assert(cap); | |
2721 | ||
2722 | // freezing|frozen? | |
2723 | if (should_defer_client_cap_frozen(in)) { | |
2724 | dout(7) << "handle_client_caps freezing|frozen on " << *in << dendl; | |
2725 | in->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryMessage(mds, m)); | |
2726 | return; | |
2727 | } | |
2728 | if (ceph_seq_cmp(m->get_mseq(), cap->get_mseq()) < 0) { | |
2729 | dout(7) << "handle_client_caps mseq " << m->get_mseq() << " < " << cap->get_mseq() | |
2730 | << ", dropping" << dendl; | |
2731 | m->put(); | |
2732 | return; | |
2733 | } | |
2734 | ||
2735 | int op = m->get_op(); | |
2736 | ||
2737 | // flushsnap? | |
2738 | if (op == CEPH_CAP_OP_FLUSHSNAP) { | |
2739 | if (!in->is_auth()) { | |
2740 | dout(7) << " not auth, ignoring flushsnap on " << *in << dendl; | |
2741 | goto out; | |
2742 | } | |
2743 | ||
2744 | SnapRealm *realm = in->find_snaprealm(); | |
2745 | snapid_t snap = realm->get_snap_following(follows); | |
2746 | dout(10) << " flushsnap follows " << follows << " -> snap " << snap << dendl; | |
2747 | ||
2748 | // we can prepare the ack now, since this FLUSHEDSNAP is independent of any | |
2749 | // other cap ops. (except possibly duplicate FLUSHSNAP requests, but worst | |
2750 | // case we get a dup response, so whatever.) | |
2751 | MClientCaps *ack = 0; | |
2752 | if (m->get_dirty()) { | |
2753 | ack = new MClientCaps(CEPH_CAP_OP_FLUSHSNAP_ACK, in->ino(), 0, 0, 0, 0, 0, m->get_dirty(), 0, mds->get_osd_epoch_barrier()); | |
2754 | ack->set_snap_follows(follows); | |
2755 | ack->set_client_tid(m->get_client_tid()); | |
2756 | ack->set_oldest_flush_tid(m->get_oldest_flush_tid()); | |
2757 | } | |
2758 | ||
2759 | if (in == head_in || | |
2760 | (head_in->client_need_snapflush.count(snap) && | |
2761 | head_in->client_need_snapflush[snap].count(client))) { | |
2762 | dout(7) << " flushsnap snap " << snap | |
2763 | << " client." << client << " on " << *in << dendl; | |
2764 | ||
2765 | // this cap now follows a later snap (i.e. the one initiating this flush, or later) | |
2766 | if (in == head_in) | |
2767 | cap->client_follows = snap < CEPH_NOSNAP ? snap : realm->get_newest_seq(); | |
c07f9fc5 FG |
2768 | else if (head_in->client_need_snapflush.begin()->first < snap) |
2769 | _do_null_snapflush(head_in, client, snap); | |
7c673cae FG |
2770 | |
2771 | _do_snap_update(in, snap, m->get_dirty(), follows, client, m, ack); | |
2772 | ||
2773 | if (in != head_in) | |
2774 | head_in->remove_need_snapflush(in, snap, client); | |
2775 | ||
2776 | } else { | |
2777 | dout(7) << " not expecting flushsnap " << snap << " from client." << client << " on " << *in << dendl; | |
2778 | if (ack) | |
2779 | mds->send_message_client_counted(ack, m->get_connection()); | |
2780 | } | |
2781 | goto out; | |
2782 | } | |
2783 | ||
2784 | if (cap->get_cap_id() != m->get_cap_id()) { | |
2785 | dout(7) << " ignoring client capid " << m->get_cap_id() << " != my " << cap->get_cap_id() << dendl; | |
2786 | } else { | |
2787 | // intermediate snap inodes | |
2788 | while (in != head_in) { | |
2789 | assert(in->last != CEPH_NOSNAP); | |
2790 | if (in->is_auth() && m->get_dirty()) { | |
2791 | dout(10) << " updating intermediate snapped inode " << *in << dendl; | |
2792 | _do_cap_update(in, NULL, m->get_dirty(), follows, m); | |
2793 | } | |
2794 | in = mdcache->pick_inode_snap(head_in, in->last); | |
2795 | } | |
2796 | ||
2797 | // head inode, and cap | |
2798 | MClientCaps *ack = 0; | |
2799 | ||
2800 | int caps = m->get_caps(); | |
2801 | if (caps & ~cap->issued()) { | |
2802 | dout(10) << " confirming not issued caps " << ccap_string(caps & ~cap->issued()) << dendl; | |
2803 | caps &= cap->issued(); | |
2804 | } | |
2805 | ||
2806 | cap->confirm_receipt(m->get_seq(), caps); | |
2807 | dout(10) << " follows " << follows | |
2808 | << " retains " << ccap_string(m->get_caps()) | |
2809 | << " dirty " << ccap_string(m->get_dirty()) | |
2810 | << " on " << *in << dendl; | |
2811 | ||
2812 | ||
2813 | // missing/skipped snapflush? | |
2814 | // The client MAY send a snapflush if it is issued WR/EXCL caps, but | |
2815 | // presently only does so when it has actual dirty metadata. But, we | |
2816 | // set up the need_snapflush stuff based on the issued caps. | |
2817 | // We can infer that the client WONT send a FLUSHSNAP once they have | |
2818 | // released all WR/EXCL caps (the FLUSHSNAP always comes before the cap | |
2819 | // update/release). | |
2820 | if (!head_in->client_need_snapflush.empty()) { | |
2821 | if ((cap->issued() & CEPH_CAP_ANY_FILE_WR) == 0) { | |
2822 | _do_null_snapflush(head_in, client); | |
2823 | } else { | |
2824 | dout(10) << " revocation in progress, not making any conclusions about null snapflushes" << dendl; | |
2825 | } | |
2826 | } | |
2827 | ||
2828 | if (m->get_dirty() && in->is_auth()) { | |
2829 | dout(7) << " flush client." << client << " dirty " << ccap_string(m->get_dirty()) | |
2830 | << " seq " << m->get_seq() << " on " << *in << dendl; | |
2831 | ack = new MClientCaps(CEPH_CAP_OP_FLUSH_ACK, in->ino(), 0, cap->get_cap_id(), m->get_seq(), | |
2832 | m->get_caps(), 0, m->get_dirty(), 0, mds->get_osd_epoch_barrier()); | |
2833 | ack->set_client_tid(m->get_client_tid()); | |
2834 | ack->set_oldest_flush_tid(m->get_oldest_flush_tid()); | |
2835 | } | |
2836 | ||
2837 | // filter wanted based on what we could ever give out (given auth/replica status) | |
2838 | bool need_flush = m->flags & CLIENT_CAPS_SYNC; | |
2839 | int new_wanted = m->get_wanted() & head_in->get_caps_allowed_ever(); | |
2840 | if (new_wanted != cap->wanted()) { | |
2841 | if (!need_flush && (new_wanted & ~cap->pending())) { | |
2842 | // exapnding caps. make sure we aren't waiting for a log flush | |
2843 | need_flush = _need_flush_mdlog(head_in, new_wanted & ~cap->pending()); | |
2844 | } | |
2845 | ||
2846 | adjust_cap_wanted(cap, new_wanted, m->get_issue_seq()); | |
2847 | } | |
2848 | ||
2849 | if (in->is_auth() && | |
2850 | _do_cap_update(in, cap, m->get_dirty(), follows, m, ack, &need_flush)) { | |
2851 | // updated | |
2852 | eval(in, CEPH_CAP_LOCKS); | |
2853 | ||
2854 | if (!need_flush && (cap->wanted() & ~cap->pending())) | |
2855 | need_flush = _need_flush_mdlog(in, cap->wanted() & ~cap->pending()); | |
2856 | } else { | |
2857 | // no update, ack now. | |
2858 | if (ack) | |
2859 | mds->send_message_client_counted(ack, m->get_connection()); | |
2860 | ||
2861 | bool did_issue = eval(in, CEPH_CAP_LOCKS); | |
2862 | if (!did_issue && (cap->wanted() & ~cap->pending())) | |
2863 | issue_caps(in, cap); | |
2864 | ||
2865 | if (cap->get_last_seq() == 0 && | |
2866 | (cap->pending() & (CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER))) { | |
2867 | cap->issue_norevoke(cap->issued()); | |
2868 | share_inode_max_size(in, cap); | |
2869 | } | |
2870 | } | |
2871 | ||
2872 | if (need_flush) | |
2873 | mds->mdlog->flush(); | |
2874 | } | |
2875 | ||
2876 | out: | |
2877 | m->put(); | |
2878 | } | |
2879 | ||
2880 | ||
2881 | class C_Locker_RetryRequestCapRelease : public LockerContext { | |
2882 | client_t client; | |
2883 | ceph_mds_request_release item; | |
2884 | public: | |
2885 | C_Locker_RetryRequestCapRelease(Locker *l, client_t c, const ceph_mds_request_release& it) : | |
2886 | LockerContext(l), client(c), item(it) { } | |
2887 | void finish(int r) override { | |
2888 | string dname; | |
2889 | MDRequestRef null_ref; | |
2890 | locker->process_request_cap_release(null_ref, client, item, dname); | |
2891 | } | |
2892 | }; | |
2893 | ||
2894 | void Locker::process_request_cap_release(MDRequestRef& mdr, client_t client, const ceph_mds_request_release& item, | |
2895 | const string &dname) | |
2896 | { | |
2897 | inodeno_t ino = (uint64_t)item.ino; | |
2898 | uint64_t cap_id = item.cap_id; | |
2899 | int caps = item.caps; | |
2900 | int wanted = item.wanted; | |
2901 | int seq = item.seq; | |
2902 | int issue_seq = item.issue_seq; | |
2903 | int mseq = item.mseq; | |
2904 | ||
2905 | CInode *in = mdcache->get_inode(ino); | |
2906 | if (!in) | |
2907 | return; | |
2908 | ||
2909 | if (dname.length()) { | |
2910 | frag_t fg = in->pick_dirfrag(dname); | |
2911 | CDir *dir = in->get_dirfrag(fg); | |
2912 | if (dir) { | |
2913 | CDentry *dn = dir->lookup(dname); | |
2914 | if (dn) { | |
2915 | ClientLease *l = dn->get_client_lease(client); | |
2916 | if (l) { | |
2917 | dout(10) << "process_cap_release removing lease on " << *dn << dendl; | |
2918 | dn->remove_client_lease(l, this); | |
2919 | } else { | |
2920 | dout(7) << "process_cap_release client." << client | |
2921 | << " doesn't have lease on " << *dn << dendl; | |
2922 | } | |
2923 | } else { | |
2924 | dout(7) << "process_cap_release client." << client << " released lease on dn " | |
2925 | << dir->dirfrag() << "/" << dname << " which dne" << dendl; | |
2926 | } | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | Capability *cap = in->get_client_cap(client); | |
2931 | if (!cap) | |
2932 | return; | |
2933 | ||
2934 | dout(10) << "process_cap_release client." << client << " " << ccap_string(caps) << " on " << *in | |
2935 | << (mdr ? "" : " (DEFERRED, no mdr)") | |
2936 | << dendl; | |
2937 | ||
2938 | if (ceph_seq_cmp(mseq, cap->get_mseq()) < 0) { | |
2939 | dout(7) << " mseq " << mseq << " < " << cap->get_mseq() << ", dropping" << dendl; | |
2940 | return; | |
2941 | } | |
2942 | ||
2943 | if (cap->get_cap_id() != cap_id) { | |
2944 | dout(7) << " cap_id " << cap_id << " != " << cap->get_cap_id() << ", dropping" << dendl; | |
2945 | return; | |
2946 | } | |
2947 | ||
2948 | if (should_defer_client_cap_frozen(in)) { | |
2949 | dout(7) << " frozen, deferring" << dendl; | |
2950 | in->add_waiter(CInode::WAIT_UNFREEZE, new C_Locker_RetryRequestCapRelease(this, client, item)); | |
2951 | return; | |
2952 | } | |
2953 | ||
2954 | if (caps & ~cap->issued()) { | |
2955 | dout(10) << " confirming not issued caps " << ccap_string(caps & ~cap->issued()) << dendl; | |
2956 | caps &= cap->issued(); | |
2957 | } | |
2958 | cap->confirm_receipt(seq, caps); | |
2959 | ||
2960 | if (!in->client_need_snapflush.empty() && | |
2961 | (cap->issued() & CEPH_CAP_ANY_FILE_WR) == 0) { | |
2962 | _do_null_snapflush(in, client); | |
2963 | } | |
2964 | ||
2965 | adjust_cap_wanted(cap, wanted, issue_seq); | |
2966 | ||
2967 | if (mdr) | |
2968 | cap->inc_suppress(); | |
2969 | eval(in, CEPH_CAP_LOCKS); | |
2970 | if (mdr) | |
2971 | cap->dec_suppress(); | |
2972 | ||
2973 | // take note; we may need to reissue on this cap later | |
2974 | if (mdr) | |
2975 | mdr->cap_releases[in->vino()] = cap->get_last_seq(); | |
2976 | } | |
2977 | ||
2978 | class C_Locker_RetryKickIssueCaps : public LockerContext { | |
2979 | CInode *in; | |
2980 | client_t client; | |
2981 | ceph_seq_t seq; | |
2982 | public: | |
2983 | C_Locker_RetryKickIssueCaps(Locker *l, CInode *i, client_t c, ceph_seq_t s) : | |
2984 | LockerContext(l), in(i), client(c), seq(s) { | |
2985 | in->get(CInode::PIN_PTRWAITER); | |
2986 | } | |
2987 | void finish(int r) override { | |
2988 | locker->kick_issue_caps(in, client, seq); | |
2989 | in->put(CInode::PIN_PTRWAITER); | |
2990 | } | |
2991 | }; | |
2992 | ||
2993 | void Locker::kick_issue_caps(CInode *in, client_t client, ceph_seq_t seq) | |
2994 | { | |
2995 | Capability *cap = in->get_client_cap(client); | |
2996 | if (!cap || cap->get_last_sent() != seq) | |
2997 | return; | |
2998 | if (in->is_frozen()) { | |
2999 | dout(10) << "kick_issue_caps waiting for unfreeze on " << *in << dendl; | |
3000 | in->add_waiter(CInode::WAIT_UNFREEZE, | |
3001 | new C_Locker_RetryKickIssueCaps(this, in, client, seq)); | |
3002 | return; | |
3003 | } | |
3004 | dout(10) << "kick_issue_caps released at current seq " << seq | |
3005 | << ", reissuing" << dendl; | |
3006 | issue_caps(in, cap); | |
3007 | } | |
3008 | ||
3009 | void Locker::kick_cap_releases(MDRequestRef& mdr) | |
3010 | { | |
3011 | client_t client = mdr->get_client(); | |
3012 | for (map<vinodeno_t,ceph_seq_t>::iterator p = mdr->cap_releases.begin(); | |
3013 | p != mdr->cap_releases.end(); | |
3014 | ++p) { | |
3015 | CInode *in = mdcache->get_inode(p->first); | |
3016 | if (!in) | |
3017 | continue; | |
3018 | kick_issue_caps(in, client, p->second); | |
3019 | } | |
3020 | } | |
3021 | ||
7c673cae FG |
3022 | /** |
3023 | * m and ack might be NULL, so don't dereference them unless dirty != 0 | |
3024 | */ | |
3025 | void Locker::_do_snap_update(CInode *in, snapid_t snap, int dirty, snapid_t follows, client_t client, MClientCaps *m, MClientCaps *ack) | |
3026 | { | |
3027 | dout(10) << "_do_snap_update dirty " << ccap_string(dirty) | |
3028 | << " follows " << follows << " snap " << snap | |
3029 | << " on " << *in << dendl; | |
3030 | ||
3031 | if (snap == CEPH_NOSNAP) { | |
3032 | // hmm, i guess snap was already deleted? just ack! | |
3033 | dout(10) << " wow, the snap following " << follows | |
3034 | << " was already deleted. nothing to record, just ack." << dendl; | |
3035 | if (ack) | |
3036 | mds->send_message_client_counted(ack, m->get_connection()); | |
3037 | return; | |
3038 | } | |
3039 | ||
3040 | EUpdate *le = new EUpdate(mds->mdlog, "snap flush"); | |
3041 | mds->mdlog->start_entry(le); | |
3042 | MutationRef mut = new MutationImpl(); | |
3043 | mut->ls = mds->mdlog->get_current_segment(); | |
3044 | ||
3045 | // normal metadata updates that we can apply to the head as well. | |
3046 | ||
3047 | // update xattrs? | |
3048 | bool xattrs = false; | |
3049 | map<string,bufferptr> *px = 0; | |
3050 | if ((dirty & CEPH_CAP_XATTR_EXCL) && | |
3051 | m->xattrbl.length() && | |
3052 | m->head.xattr_version > in->get_projected_inode()->xattr_version) | |
3053 | xattrs = true; | |
3054 | ||
3055 | old_inode_t *oi = 0; | |
3056 | if (in->is_multiversion()) { | |
3057 | oi = in->pick_old_inode(snap); | |
3058 | } | |
3059 | ||
3060 | inode_t *pi; | |
3061 | if (oi) { | |
3062 | dout(10) << " writing into old inode" << dendl; | |
3063 | pi = in->project_inode(); | |
3064 | pi->version = in->pre_dirty(); | |
3065 | if (snap > oi->first) | |
3066 | in->split_old_inode(snap); | |
3067 | pi = &oi->inode; | |
3068 | if (xattrs) | |
3069 | px = &oi->xattrs; | |
3070 | } else { | |
3071 | if (xattrs) | |
3072 | px = new map<string,bufferptr>; | |
3073 | pi = in->project_inode(px); | |
3074 | pi->version = in->pre_dirty(); | |
3075 | } | |
3076 | ||
3077 | _update_cap_fields(in, dirty, m, pi); | |
3078 | ||
3079 | // xattr | |
3080 | if (px) { | |
3081 | dout(7) << " xattrs v" << pi->xattr_version << " -> " << m->head.xattr_version | |
3082 | << " len " << m->xattrbl.length() << dendl; | |
3083 | pi->xattr_version = m->head.xattr_version; | |
3084 | bufferlist::iterator p = m->xattrbl.begin(); | |
3085 | ::decode(*px, p); | |
3086 | } | |
3087 | ||
3088 | if (pi->client_ranges.count(client)) { | |
3089 | if (in->last == snap) { | |
3090 | dout(10) << " removing client_range entirely" << dendl; | |
3091 | pi->client_ranges.erase(client); | |
3092 | } else { | |
3093 | dout(10) << " client_range now follows " << snap << dendl; | |
3094 | pi->client_ranges[client].follows = snap; | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | mut->auth_pin(in); | |
3099 | mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY, 0, follows); | |
3100 | mdcache->journal_dirty_inode(mut.get(), &le->metablob, in, follows); | |
3101 | ||
3102 | // "oldest flush tid" > 0 means client uses unique TID for each flush | |
3103 | if (ack && ack->get_oldest_flush_tid() > 0) | |
3104 | le->metablob.add_client_flush(metareqid_t(m->get_source(), ack->get_client_tid()), | |
3105 | ack->get_oldest_flush_tid()); | |
3106 | ||
3107 | mds->mdlog->submit_entry(le, new C_Locker_FileUpdate_finish(this, in, mut, false, false, | |
3108 | client, ack)); | |
3109 | } | |
3110 | ||
3111 | void Locker::_update_cap_fields(CInode *in, int dirty, MClientCaps *m, inode_t *pi) | |
3112 | { | |
3113 | if (dirty == 0) | |
3114 | return; | |
3115 | ||
3116 | /* m must be valid if there are dirty caps */ | |
3117 | assert(m); | |
3118 | uint64_t features = m->get_connection()->get_features(); | |
3119 | ||
3120 | if (m->get_ctime() > pi->ctime) { | |
3121 | dout(7) << " ctime " << pi->ctime << " -> " << m->get_ctime() | |
3122 | << " for " << *in << dendl; | |
3123 | pi->ctime = m->get_ctime(); | |
3124 | } | |
3125 | ||
3126 | if ((features & CEPH_FEATURE_FS_CHANGE_ATTR) && | |
3127 | m->get_change_attr() > pi->change_attr) { | |
3128 | dout(7) << " change_attr " << pi->change_attr << " -> " << m->get_change_attr() | |
3129 | << " for " << *in << dendl; | |
3130 | pi->change_attr = m->get_change_attr(); | |
3131 | } | |
3132 | ||
3133 | // file | |
3134 | if (dirty & (CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR)) { | |
3135 | utime_t atime = m->get_atime(); | |
3136 | utime_t mtime = m->get_mtime(); | |
3137 | uint64_t size = m->get_size(); | |
3138 | version_t inline_version = m->inline_version; | |
3139 | ||
3140 | if (((dirty & CEPH_CAP_FILE_WR) && mtime > pi->mtime) || | |
3141 | ((dirty & CEPH_CAP_FILE_EXCL) && mtime != pi->mtime)) { | |
3142 | dout(7) << " mtime " << pi->mtime << " -> " << mtime | |
3143 | << " for " << *in << dendl; | |
3144 | pi->mtime = mtime; | |
3145 | } | |
3146 | if (in->inode.is_file() && // ONLY if regular file | |
3147 | size > pi->size) { | |
3148 | dout(7) << " size " << pi->size << " -> " << size | |
3149 | << " for " << *in << dendl; | |
3150 | pi->size = size; | |
3151 | pi->rstat.rbytes = size; | |
3152 | } | |
3153 | if (in->inode.is_file() && | |
3154 | (dirty & CEPH_CAP_FILE_WR) && | |
3155 | inline_version > pi->inline_data.version) { | |
3156 | pi->inline_data.version = inline_version; | |
3157 | if (inline_version != CEPH_INLINE_NONE && m->inline_data.length() > 0) | |
3158 | pi->inline_data.get_data() = m->inline_data; | |
3159 | else | |
3160 | pi->inline_data.free_data(); | |
3161 | } | |
3162 | if ((dirty & CEPH_CAP_FILE_EXCL) && atime != pi->atime) { | |
3163 | dout(7) << " atime " << pi->atime << " -> " << atime | |
3164 | << " for " << *in << dendl; | |
3165 | pi->atime = atime; | |
3166 | } | |
3167 | if ((dirty & CEPH_CAP_FILE_EXCL) && | |
3168 | ceph_seq_cmp(pi->time_warp_seq, m->get_time_warp_seq()) < 0) { | |
3169 | dout(7) << " time_warp_seq " << pi->time_warp_seq << " -> " << m->get_time_warp_seq() | |
3170 | << " for " << *in << dendl; | |
3171 | pi->time_warp_seq = m->get_time_warp_seq(); | |
3172 | } | |
3173 | } | |
3174 | // auth | |
3175 | if (dirty & CEPH_CAP_AUTH_EXCL) { | |
3176 | if (m->head.uid != pi->uid) { | |
3177 | dout(7) << " uid " << pi->uid | |
3178 | << " -> " << m->head.uid | |
3179 | << " for " << *in << dendl; | |
3180 | pi->uid = m->head.uid; | |
3181 | } | |
3182 | if (m->head.gid != pi->gid) { | |
3183 | dout(7) << " gid " << pi->gid | |
3184 | << " -> " << m->head.gid | |
3185 | << " for " << *in << dendl; | |
3186 | pi->gid = m->head.gid; | |
3187 | } | |
3188 | if (m->head.mode != pi->mode) { | |
3189 | dout(7) << " mode " << oct << pi->mode | |
3190 | << " -> " << m->head.mode << dec | |
3191 | << " for " << *in << dendl; | |
3192 | pi->mode = m->head.mode; | |
3193 | } | |
3194 | if ((features & CEPH_FEATURE_FS_BTIME) && m->get_btime() != pi->btime) { | |
3195 | dout(7) << " btime " << oct << pi->btime | |
3196 | << " -> " << m->get_btime() << dec | |
3197 | << " for " << *in << dendl; | |
3198 | pi->btime = m->get_btime(); | |
3199 | } | |
3200 | } | |
3201 | } | |
3202 | ||
3203 | /* | |
3204 | * update inode based on cap flush|flushsnap|wanted. | |
3205 | * adjust max_size, if needed. | |
3206 | * if we update, return true; otherwise, false (no updated needed). | |
3207 | */ | |
3208 | bool Locker::_do_cap_update(CInode *in, Capability *cap, | |
3209 | int dirty, snapid_t follows, | |
3210 | MClientCaps *m, MClientCaps *ack, | |
3211 | bool *need_flush) | |
3212 | { | |
3213 | dout(10) << "_do_cap_update dirty " << ccap_string(dirty) | |
3214 | << " issued " << ccap_string(cap ? cap->issued() : 0) | |
3215 | << " wanted " << ccap_string(cap ? cap->wanted() : 0) | |
3216 | << " on " << *in << dendl; | |
3217 | assert(in->is_auth()); | |
3218 | client_t client = m->get_source().num(); | |
3219 | inode_t *latest = in->get_projected_inode(); | |
3220 | ||
3221 | // increase or zero max_size? | |
3222 | uint64_t size = m->get_size(); | |
3223 | bool change_max = false; | |
3224 | uint64_t old_max = latest->client_ranges.count(client) ? latest->client_ranges[client].range.last : 0; | |
3225 | uint64_t new_max = old_max; | |
3226 | ||
3227 | if (in->is_file()) { | |
3228 | bool forced_change_max = false; | |
3229 | dout(20) << "inode is file" << dendl; | |
3230 | if (cap && ((cap->issued() | cap->wanted()) & CEPH_CAP_ANY_FILE_WR)) { | |
3231 | dout(20) << "client has write caps; m->get_max_size=" | |
3232 | << m->get_max_size() << "; old_max=" << old_max << dendl; | |
3233 | if (m->get_max_size() > new_max) { | |
3234 | dout(10) << "client requests file_max " << m->get_max_size() | |
3235 | << " > max " << old_max << dendl; | |
3236 | change_max = true; | |
3237 | forced_change_max = true; | |
31f18b77 | 3238 | new_max = calc_new_max_size(latest, m->get_max_size()); |
7c673cae | 3239 | } else { |
31f18b77 | 3240 | new_max = calc_new_max_size(latest, size); |
7c673cae FG |
3241 | |
3242 | if (new_max > old_max) | |
3243 | change_max = true; | |
3244 | else | |
3245 | new_max = old_max; | |
3246 | } | |
3247 | } else { | |
3248 | if (old_max) { | |
3249 | change_max = true; | |
3250 | new_max = 0; | |
3251 | } | |
3252 | } | |
3253 | ||
3254 | if (in->last == CEPH_NOSNAP && | |
3255 | change_max && | |
3256 | !in->filelock.can_wrlock(client) && | |
3257 | !in->filelock.can_force_wrlock(client)) { | |
3258 | dout(10) << " i want to change file_max, but lock won't allow it (yet)" << dendl; | |
3259 | if (in->filelock.is_stable()) { | |
3260 | bool need_issue = false; | |
3261 | if (cap) | |
3262 | cap->inc_suppress(); | |
3263 | if (in->mds_caps_wanted.empty() && | |
3264 | (in->get_loner() >= 0 || (in->get_wanted_loner() >= 0 && in->try_set_loner()))) { | |
3265 | if (in->filelock.get_state() != LOCK_EXCL) | |
3266 | file_excl(&in->filelock, &need_issue); | |
3267 | } else | |
3268 | simple_lock(&in->filelock, &need_issue); | |
3269 | if (need_issue) | |
3270 | issue_caps(in); | |
3271 | if (cap) | |
3272 | cap->dec_suppress(); | |
3273 | } | |
3274 | if (!in->filelock.can_wrlock(client) && | |
3275 | !in->filelock.can_force_wrlock(client)) { | |
3276 | C_MDL_CheckMaxSize *cms = new C_MDL_CheckMaxSize(this, in, | |
3277 | forced_change_max ? new_max : 0, | |
3278 | 0, utime_t()); | |
3279 | ||
3280 | in->filelock.add_waiter(SimpleLock::WAIT_STABLE, cms); | |
3281 | change_max = false; | |
3282 | } | |
3283 | } | |
3284 | } | |
3285 | ||
3286 | if (m->flockbl.length()) { | |
3287 | int32_t num_locks; | |
3288 | bufferlist::iterator bli = m->flockbl.begin(); | |
3289 | ::decode(num_locks, bli); | |
3290 | for ( int i=0; i < num_locks; ++i) { | |
3291 | ceph_filelock decoded_lock; | |
3292 | ::decode(decoded_lock, bli); | |
3293 | in->get_fcntl_lock_state()->held_locks. | |
3294 | insert(pair<uint64_t, ceph_filelock>(decoded_lock.start, decoded_lock)); | |
3295 | ++in->get_fcntl_lock_state()->client_held_lock_counts[(client_t)(decoded_lock.client)]; | |
3296 | } | |
3297 | ::decode(num_locks, bli); | |
3298 | for ( int i=0; i < num_locks; ++i) { | |
3299 | ceph_filelock decoded_lock; | |
3300 | ::decode(decoded_lock, bli); | |
3301 | in->get_flock_lock_state()->held_locks. | |
3302 | insert(pair<uint64_t, ceph_filelock>(decoded_lock.start, decoded_lock)); | |
3303 | ++in->get_flock_lock_state()->client_held_lock_counts[(client_t)(decoded_lock.client)]; | |
3304 | } | |
3305 | } | |
3306 | ||
3307 | if (!dirty && !change_max) | |
3308 | return false; | |
3309 | ||
3310 | Session *session = static_cast<Session *>(m->get_connection()->get_priv()); | |
3311 | if (session->check_access(in, MAY_WRITE, | |
3312 | m->caller_uid, m->caller_gid, NULL, 0, 0) < 0) { | |
3313 | session->put(); | |
3314 | dout(10) << "check_access failed, dropping cap update on " << *in << dendl; | |
3315 | return false; | |
3316 | } | |
3317 | session->put(); | |
3318 | ||
3319 | // do the update. | |
3320 | EUpdate *le = new EUpdate(mds->mdlog, "cap update"); | |
3321 | mds->mdlog->start_entry(le); | |
3322 | ||
3323 | // xattrs update? | |
3324 | map<string,bufferptr> *px = 0; | |
3325 | if ((dirty & CEPH_CAP_XATTR_EXCL) && | |
3326 | m->xattrbl.length() && | |
3327 | m->head.xattr_version > in->get_projected_inode()->xattr_version) | |
3328 | px = new map<string,bufferptr>; | |
3329 | ||
3330 | inode_t *pi = in->project_inode(px); | |
3331 | pi->version = in->pre_dirty(); | |
3332 | ||
3333 | MutationRef mut(new MutationImpl()); | |
3334 | mut->ls = mds->mdlog->get_current_segment(); | |
3335 | ||
3336 | _update_cap_fields(in, dirty, m, pi); | |
3337 | ||
3338 | if (change_max) { | |
3339 | dout(7) << " max_size " << old_max << " -> " << new_max | |
3340 | << " for " << *in << dendl; | |
3341 | if (new_max) { | |
3342 | pi->client_ranges[client].range.first = 0; | |
3343 | pi->client_ranges[client].range.last = new_max; | |
3344 | pi->client_ranges[client].follows = in->first - 1; | |
3345 | } else | |
3346 | pi->client_ranges.erase(client); | |
3347 | } | |
3348 | ||
3349 | if (change_max || (dirty & (CEPH_CAP_FILE_EXCL|CEPH_CAP_FILE_WR))) | |
3350 | wrlock_force(&in->filelock, mut); // wrlock for duration of journal | |
3351 | ||
3352 | // auth | |
3353 | if (dirty & CEPH_CAP_AUTH_EXCL) | |
3354 | wrlock_force(&in->authlock, mut); | |
3355 | ||
3356 | // xattr | |
3357 | if (px) { | |
3358 | dout(7) << " xattrs v" << pi->xattr_version << " -> " << m->head.xattr_version << dendl; | |
3359 | pi->xattr_version = m->head.xattr_version; | |
3360 | bufferlist::iterator p = m->xattrbl.begin(); | |
3361 | ::decode(*px, p); | |
3362 | ||
3363 | wrlock_force(&in->xattrlock, mut); | |
3364 | } | |
3365 | ||
3366 | mut->auth_pin(in); | |
3367 | mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY, 0, follows); | |
3368 | mdcache->journal_dirty_inode(mut.get(), &le->metablob, in, follows); | |
3369 | ||
3370 | // "oldest flush tid" > 0 means client uses unique TID for each flush | |
3371 | if (ack && ack->get_oldest_flush_tid() > 0) | |
3372 | le->metablob.add_client_flush(metareqid_t(m->get_source(), ack->get_client_tid()), | |
3373 | ack->get_oldest_flush_tid()); | |
3374 | ||
3375 | mds->mdlog->submit_entry(le, new C_Locker_FileUpdate_finish(this, in, mut, | |
3376 | change_max, !!cap, | |
3377 | client, ack)); | |
3378 | if (need_flush && !*need_flush && | |
3379 | ((change_max && new_max) || // max INCREASE | |
3380 | _need_flush_mdlog(in, dirty))) | |
3381 | *need_flush = true; | |
3382 | ||
3383 | return true; | |
3384 | } | |
3385 | ||
3386 | /* This function DOES put the passed message before returning */ | |
3387 | void Locker::handle_client_cap_release(MClientCapRelease *m) | |
3388 | { | |
3389 | client_t client = m->get_source().num(); | |
3390 | dout(10) << "handle_client_cap_release " << *m << dendl; | |
3391 | ||
3392 | if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) { | |
3393 | mds->wait_for_replay(new C_MDS_RetryMessage(mds, m)); | |
3394 | return; | |
3395 | } | |
3396 | ||
3397 | if (m->osd_epoch_barrier && !mds->objecter->have_map(m->osd_epoch_barrier)) { | |
3398 | // Pause RADOS operations until we see the required epoch | |
3399 | mds->objecter->set_epoch_barrier(m->osd_epoch_barrier); | |
3400 | } | |
3401 | ||
3402 | if (mds->get_osd_epoch_barrier() < m->osd_epoch_barrier) { | |
3403 | // Record the barrier so that we will retransmit it to clients | |
3404 | mds->set_osd_epoch_barrier(m->osd_epoch_barrier); | |
3405 | } | |
3406 | ||
3407 | Session *session = static_cast<Session *>(m->get_connection()->get_priv()); | |
3408 | ||
3409 | for (vector<ceph_mds_cap_item>::iterator p = m->caps.begin(); p != m->caps.end(); ++p) { | |
3410 | _do_cap_release(client, inodeno_t((uint64_t)p->ino) , p->cap_id, p->migrate_seq, p->seq); | |
3411 | } | |
3412 | ||
3413 | if (session) { | |
3414 | session->notify_cap_release(m->caps.size()); | |
3415 | } | |
3416 | ||
3417 | m->put(); | |
3418 | } | |
3419 | ||
3420 | class C_Locker_RetryCapRelease : public LockerContext { | |
3421 | client_t client; | |
3422 | inodeno_t ino; | |
3423 | uint64_t cap_id; | |
3424 | ceph_seq_t migrate_seq; | |
3425 | ceph_seq_t issue_seq; | |
3426 | public: | |
3427 | C_Locker_RetryCapRelease(Locker *l, client_t c, inodeno_t i, uint64_t id, | |
3428 | ceph_seq_t mseq, ceph_seq_t seq) : | |
3429 | LockerContext(l), client(c), ino(i), cap_id(id), migrate_seq(mseq), issue_seq(seq) {} | |
3430 | void finish(int r) override { | |
3431 | locker->_do_cap_release(client, ino, cap_id, migrate_seq, issue_seq); | |
3432 | } | |
3433 | }; | |
3434 | ||
3435 | void Locker::_do_cap_release(client_t client, inodeno_t ino, uint64_t cap_id, | |
3436 | ceph_seq_t mseq, ceph_seq_t seq) | |
3437 | { | |
3438 | CInode *in = mdcache->get_inode(ino); | |
3439 | if (!in) { | |
3440 | dout(7) << "_do_cap_release missing ino " << ino << dendl; | |
3441 | return; | |
3442 | } | |
3443 | Capability *cap = in->get_client_cap(client); | |
3444 | if (!cap) { | |
3445 | dout(7) << "_do_cap_release no cap for client" << client << " on "<< *in << dendl; | |
3446 | return; | |
3447 | } | |
3448 | ||
3449 | dout(7) << "_do_cap_release for client." << client << " on "<< *in << dendl; | |
3450 | if (cap->get_cap_id() != cap_id) { | |
3451 | dout(7) << " capid " << cap_id << " != " << cap->get_cap_id() << ", ignore" << dendl; | |
3452 | return; | |
3453 | } | |
3454 | if (ceph_seq_cmp(mseq, cap->get_mseq()) < 0) { | |
3455 | dout(7) << " mseq " << mseq << " < " << cap->get_mseq() << ", ignore" << dendl; | |
3456 | return; | |
3457 | } | |
3458 | if (should_defer_client_cap_frozen(in)) { | |
3459 | dout(7) << " freezing|frozen, deferring" << dendl; | |
3460 | in->add_waiter(CInode::WAIT_UNFREEZE, | |
3461 | new C_Locker_RetryCapRelease(this, client, ino, cap_id, mseq, seq)); | |
3462 | return; | |
3463 | } | |
3464 | if (seq != cap->get_last_issue()) { | |
3465 | dout(7) << " issue_seq " << seq << " != " << cap->get_last_issue() << dendl; | |
3466 | // clean out any old revoke history | |
3467 | cap->clean_revoke_from(seq); | |
3468 | eval_cap_gather(in); | |
3469 | return; | |
3470 | } | |
3471 | remove_client_cap(in, client); | |
3472 | } | |
3473 | ||
3474 | /* This function DOES put the passed message before returning */ | |
3475 | ||
3476 | void Locker::remove_client_cap(CInode *in, client_t client) | |
3477 | { | |
3478 | // clean out any pending snapflush state | |
3479 | if (!in->client_need_snapflush.empty()) | |
3480 | _do_null_snapflush(in, client); | |
3481 | ||
3482 | in->remove_client_cap(client); | |
3483 | ||
3484 | if (in->is_auth()) { | |
3485 | // make sure we clear out the client byte range | |
3486 | if (in->get_projected_inode()->client_ranges.count(client) && | |
3487 | !(in->inode.nlink == 0 && !in->is_any_caps())) // unless it's unlink + stray | |
3488 | check_inode_max_size(in); | |
3489 | } else { | |
3490 | request_inode_file_caps(in); | |
3491 | } | |
3492 | ||
3493 | try_eval(in, CEPH_CAP_LOCKS); | |
3494 | } | |
3495 | ||
3496 | ||
3497 | /** | |
3498 | * Return true if any currently revoking caps exceed the | |
3499 | * mds_revoke_cap_timeout threshold. | |
3500 | */ | |
3501 | bool Locker::any_late_revoking_caps(xlist<Capability*> const &revoking) const | |
3502 | { | |
3503 | xlist<Capability*>::const_iterator p = revoking.begin(); | |
3504 | if (p.end()) { | |
3505 | // No revoking caps at the moment | |
3506 | return false; | |
3507 | } else { | |
3508 | utime_t now = ceph_clock_now(); | |
3509 | utime_t age = now - (*p)->get_last_revoke_stamp(); | |
3510 | if (age <= g_conf->mds_revoke_cap_timeout) { | |
3511 | return false; | |
3512 | } else { | |
3513 | return true; | |
3514 | } | |
3515 | } | |
3516 | } | |
3517 | ||
3518 | ||
3519 | void Locker::get_late_revoking_clients(std::list<client_t> *result) const | |
3520 | { | |
3521 | if (!any_late_revoking_caps(revoking_caps)) { | |
3522 | // Fast path: no misbehaving clients, execute in O(1) | |
3523 | return; | |
3524 | } | |
3525 | ||
3526 | // Slow path: execute in O(N_clients) | |
3527 | std::map<client_t, xlist<Capability*> >::const_iterator client_rc_iter; | |
3528 | for (client_rc_iter = revoking_caps_by_client.begin(); | |
3529 | client_rc_iter != revoking_caps_by_client.end(); ++client_rc_iter) { | |
3530 | xlist<Capability*> const &client_rc = client_rc_iter->second; | |
3531 | bool any_late = any_late_revoking_caps(client_rc); | |
3532 | if (any_late) { | |
3533 | result->push_back(client_rc_iter->first); | |
3534 | } | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | // Hard-code instead of surfacing a config settings because this is | |
3539 | // really a hack that should go away at some point when we have better | |
3540 | // inspection tools for getting at detailed cap state (#7316) | |
3541 | #define MAX_WARN_CAPS 100 | |
3542 | ||
3543 | void Locker::caps_tick() | |
3544 | { | |
3545 | utime_t now = ceph_clock_now(); | |
3546 | ||
3547 | dout(20) << __func__ << " " << revoking_caps.size() << " revoking caps" << dendl; | |
3548 | ||
3549 | int i = 0; | |
3550 | for (xlist<Capability*>::iterator p = revoking_caps.begin(); !p.end(); ++p) { | |
3551 | Capability *cap = *p; | |
3552 | ||
3553 | utime_t age = now - cap->get_last_revoke_stamp(); | |
3554 | dout(20) << __func__ << " age = " << age << cap->get_client() << "." << cap->get_inode()->ino() << dendl; | |
3555 | if (age <= g_conf->mds_revoke_cap_timeout) { | |
3556 | dout(20) << __func__ << " age below timeout " << g_conf->mds_revoke_cap_timeout << dendl; | |
3557 | break; | |
3558 | } else { | |
3559 | ++i; | |
3560 | if (i > MAX_WARN_CAPS) { | |
3561 | dout(1) << __func__ << " more than " << MAX_WARN_CAPS << " caps are late" | |
3562 | << "revoking, ignoring subsequent caps" << dendl; | |
3563 | break; | |
3564 | } | |
3565 | } | |
3566 | // exponential backoff of warning intervals | |
3567 | if (age > g_conf->mds_revoke_cap_timeout * (1 << cap->get_num_revoke_warnings())) { | |
3568 | cap->inc_num_revoke_warnings(); | |
3569 | stringstream ss; | |
3570 | ss << "client." << cap->get_client() << " isn't responding to mclientcaps(revoke), ino " | |
3571 | << cap->get_inode()->ino() << " pending " << ccap_string(cap->pending()) | |
3572 | << " issued " << ccap_string(cap->issued()) << ", sent " << age << " seconds ago"; | |
3573 | mds->clog->warn() << ss.str(); | |
3574 | dout(20) << __func__ << " " << ss.str() << dendl; | |
3575 | } else { | |
3576 | dout(20) << __func__ << " silencing log message (backoff) for " << cap->get_client() << "." << cap->get_inode()->ino() << dendl; | |
3577 | } | |
3578 | } | |
3579 | } | |
3580 | ||
3581 | ||
3582 | void Locker::handle_client_lease(MClientLease *m) | |
3583 | { | |
3584 | dout(10) << "handle_client_lease " << *m << dendl; | |
3585 | ||
3586 | assert(m->get_source().is_client()); | |
3587 | client_t client = m->get_source().num(); | |
3588 | ||
3589 | CInode *in = mdcache->get_inode(m->get_ino(), m->get_last()); | |
3590 | if (!in) { | |
3591 | dout(7) << "handle_client_lease don't have ino " << m->get_ino() << "." << m->get_last() << dendl; | |
3592 | m->put(); | |
3593 | return; | |
3594 | } | |
3595 | CDentry *dn = 0; | |
3596 | ||
3597 | frag_t fg = in->pick_dirfrag(m->dname); | |
3598 | CDir *dir = in->get_dirfrag(fg); | |
3599 | if (dir) | |
3600 | dn = dir->lookup(m->dname); | |
3601 | if (!dn) { | |
3602 | dout(7) << "handle_client_lease don't have dn " << m->get_ino() << " " << m->dname << dendl; | |
3603 | m->put(); | |
3604 | return; | |
3605 | } | |
3606 | dout(10) << " on " << *dn << dendl; | |
3607 | ||
3608 | // replica and lock | |
3609 | ClientLease *l = dn->get_client_lease(client); | |
3610 | if (!l) { | |
3611 | dout(7) << "handle_client_lease didn't have lease for client." << client << " of " << *dn << dendl; | |
3612 | m->put(); | |
3613 | return; | |
3614 | } | |
3615 | ||
3616 | switch (m->get_action()) { | |
3617 | case CEPH_MDS_LEASE_REVOKE_ACK: | |
3618 | case CEPH_MDS_LEASE_RELEASE: | |
3619 | if (l->seq != m->get_seq()) { | |
3620 | dout(7) << "handle_client_lease release - seq " << l->seq << " != provided " << m->get_seq() << dendl; | |
3621 | } else { | |
3622 | dout(7) << "handle_client_lease client." << client | |
3623 | << " on " << *dn << dendl; | |
3624 | dn->remove_client_lease(l, this); | |
3625 | } | |
3626 | m->put(); | |
3627 | break; | |
3628 | ||
3629 | case CEPH_MDS_LEASE_RENEW: | |
3630 | { | |
3631 | dout(7) << "handle_client_lease client." << client << " renew on " << *dn | |
3632 | << (!dn->lock.can_lease(client)?", revoking lease":"") << dendl; | |
3633 | if (dn->lock.can_lease(client)) { | |
3634 | int pool = 1; // fixme.. do something smart! | |
3635 | m->h.duration_ms = (int)(1000 * mdcache->client_lease_durations[pool]); | |
3636 | m->h.seq = ++l->seq; | |
3637 | m->clear_payload(); | |
3638 | ||
3639 | utime_t now = ceph_clock_now(); | |
3640 | now += mdcache->client_lease_durations[pool]; | |
3641 | mdcache->touch_client_lease(l, pool, now); | |
3642 | ||
3643 | mds->send_message_client_counted(m, m->get_connection()); | |
3644 | } | |
3645 | } | |
3646 | break; | |
3647 | ||
3648 | default: | |
3649 | ceph_abort(); // implement me | |
3650 | break; | |
3651 | } | |
3652 | } | |
3653 | ||
3654 | ||
3655 | void Locker::issue_client_lease(CDentry *dn, client_t client, | |
3656 | bufferlist &bl, utime_t now, Session *session) | |
3657 | { | |
3658 | CInode *diri = dn->get_dir()->get_inode(); | |
3659 | if (!diri->is_stray() && // do not issue dn leases in stray dir! | |
3660 | ((!diri->filelock.can_lease(client) && | |
3661 | (diri->get_client_cap_pending(client) & (CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_EXCL)) == 0)) && | |
3662 | dn->lock.can_lease(client)) { | |
3663 | int pool = 1; // fixme.. do something smart! | |
3664 | // issue a dentry lease | |
3665 | ClientLease *l = dn->add_client_lease(client, session); | |
3666 | session->touch_lease(l); | |
3667 | ||
3668 | now += mdcache->client_lease_durations[pool]; | |
3669 | mdcache->touch_client_lease(l, pool, now); | |
3670 | ||
3671 | LeaseStat e; | |
3672 | e.mask = 1 | CEPH_LOCK_DN; // old and new bit values | |
3673 | e.seq = ++l->seq; | |
3674 | e.duration_ms = (int)(1000 * mdcache->client_lease_durations[pool]); | |
3675 | ::encode(e, bl); | |
3676 | dout(20) << "issue_client_lease seq " << e.seq << " dur " << e.duration_ms << "ms " | |
3677 | << " on " << *dn << dendl; | |
3678 | } else { | |
3679 | // null lease | |
3680 | LeaseStat e; | |
3681 | e.mask = 0; | |
3682 | e.seq = 0; | |
3683 | e.duration_ms = 0; | |
3684 | ::encode(e, bl); | |
3685 | dout(20) << "issue_client_lease no/null lease on " << *dn << dendl; | |
3686 | } | |
3687 | } | |
3688 | ||
3689 | ||
3690 | void Locker::revoke_client_leases(SimpleLock *lock) | |
3691 | { | |
3692 | int n = 0; | |
3693 | CDentry *dn = static_cast<CDentry*>(lock->get_parent()); | |
3694 | for (map<client_t, ClientLease*>::iterator p = dn->client_lease_map.begin(); | |
3695 | p != dn->client_lease_map.end(); | |
3696 | ++p) { | |
3697 | ClientLease *l = p->second; | |
3698 | ||
3699 | n++; | |
3700 | assert(lock->get_type() == CEPH_LOCK_DN); | |
3701 | ||
3702 | CDentry *dn = static_cast<CDentry*>(lock->get_parent()); | |
3703 | int mask = 1 | CEPH_LOCK_DN; // old and new bits | |
3704 | ||
3705 | // i should also revoke the dir ICONTENT lease, if they have it! | |
3706 | CInode *diri = dn->get_dir()->get_inode(); | |
3707 | mds->send_message_client_counted(new MClientLease(CEPH_MDS_LEASE_REVOKE, l->seq, | |
3708 | mask, | |
3709 | diri->ino(), | |
3710 | diri->first, CEPH_NOSNAP, | |
3711 | dn->get_name()), | |
3712 | l->client); | |
3713 | } | |
3714 | assert(n == lock->get_num_client_lease()); | |
3715 | } | |
3716 | ||
3717 | ||
3718 | ||
3719 | // locks ---------------------------------------------------------------- | |
3720 | ||
3721 | SimpleLock *Locker::get_lock(int lock_type, MDSCacheObjectInfo &info) | |
3722 | { | |
3723 | switch (lock_type) { | |
3724 | case CEPH_LOCK_DN: | |
3725 | { | |
3726 | // be careful; info.dirfrag may have incorrect frag; recalculate based on dname. | |
3727 | CInode *diri = mdcache->get_inode(info.dirfrag.ino); | |
3728 | frag_t fg; | |
3729 | CDir *dir = 0; | |
3730 | CDentry *dn = 0; | |
3731 | if (diri) { | |
3732 | fg = diri->pick_dirfrag(info.dname); | |
3733 | dir = diri->get_dirfrag(fg); | |
3734 | if (dir) | |
3735 | dn = dir->lookup(info.dname, info.snapid); | |
3736 | } | |
3737 | if (!dn) { | |
3738 | dout(7) << "get_lock don't have dn " << info.dirfrag.ino << " " << info.dname << dendl; | |
3739 | return 0; | |
3740 | } | |
3741 | return &dn->lock; | |
3742 | } | |
3743 | ||
3744 | case CEPH_LOCK_IAUTH: | |
3745 | case CEPH_LOCK_ILINK: | |
3746 | case CEPH_LOCK_IDFT: | |
3747 | case CEPH_LOCK_IFILE: | |
3748 | case CEPH_LOCK_INEST: | |
3749 | case CEPH_LOCK_IXATTR: | |
3750 | case CEPH_LOCK_ISNAP: | |
3751 | case CEPH_LOCK_IFLOCK: | |
3752 | case CEPH_LOCK_IPOLICY: | |
3753 | { | |
3754 | CInode *in = mdcache->get_inode(info.ino, info.snapid); | |
3755 | if (!in) { | |
3756 | dout(7) << "get_lock don't have ino " << info.ino << dendl; | |
3757 | return 0; | |
3758 | } | |
3759 | switch (lock_type) { | |
3760 | case CEPH_LOCK_IAUTH: return &in->authlock; | |
3761 | case CEPH_LOCK_ILINK: return &in->linklock; | |
3762 | case CEPH_LOCK_IDFT: return &in->dirfragtreelock; | |
3763 | case CEPH_LOCK_IFILE: return &in->filelock; | |
3764 | case CEPH_LOCK_INEST: return &in->nestlock; | |
3765 | case CEPH_LOCK_IXATTR: return &in->xattrlock; | |
3766 | case CEPH_LOCK_ISNAP: return &in->snaplock; | |
3767 | case CEPH_LOCK_IFLOCK: return &in->flocklock; | |
3768 | case CEPH_LOCK_IPOLICY: return &in->policylock; | |
3769 | } | |
3770 | } | |
3771 | ||
3772 | default: | |
3773 | dout(7) << "get_lock don't know lock_type " << lock_type << dendl; | |
3774 | ceph_abort(); | |
3775 | break; | |
3776 | } | |
3777 | ||
3778 | return 0; | |
3779 | } | |
3780 | ||
3781 | /* This function DOES put the passed message before returning */ | |
3782 | void Locker::handle_lock(MLock *m) | |
3783 | { | |
3784 | // nobody should be talking to us during recovery. | |
3785 | assert(mds->is_rejoin() || mds->is_clientreplay() || mds->is_active() || mds->is_stopping()); | |
3786 | ||
3787 | SimpleLock *lock = get_lock(m->get_lock_type(), m->get_object_info()); | |
3788 | if (!lock) { | |
3789 | dout(10) << "don't have object " << m->get_object_info() << ", must have trimmed, dropping" << dendl; | |
3790 | m->put(); | |
3791 | return; | |
3792 | } | |
3793 | ||
3794 | switch (lock->get_type()) { | |
3795 | case CEPH_LOCK_DN: | |
3796 | case CEPH_LOCK_IAUTH: | |
3797 | case CEPH_LOCK_ILINK: | |
3798 | case CEPH_LOCK_ISNAP: | |
3799 | case CEPH_LOCK_IXATTR: | |
3800 | case CEPH_LOCK_IFLOCK: | |
3801 | case CEPH_LOCK_IPOLICY: | |
3802 | handle_simple_lock(lock, m); | |
3803 | break; | |
3804 | ||
3805 | case CEPH_LOCK_IDFT: | |
3806 | case CEPH_LOCK_INEST: | |
3807 | //handle_scatter_lock((ScatterLock*)lock, m); | |
3808 | //break; | |
3809 | ||
3810 | case CEPH_LOCK_IFILE: | |
3811 | handle_file_lock(static_cast<ScatterLock*>(lock), m); | |
3812 | break; | |
3813 | ||
3814 | default: | |
3815 | dout(7) << "handle_lock got otype " << m->get_lock_type() << dendl; | |
3816 | ceph_abort(); | |
3817 | break; | |
3818 | } | |
3819 | } | |
3820 | ||
3821 | ||
3822 | ||
3823 | ||
3824 | ||
3825 | // ========================================================================== | |
3826 | // simple lock | |
3827 | ||
3828 | /** This function may take a reference to m if it needs one, but does | |
3829 | * not put references. */ | |
3830 | void Locker::handle_reqrdlock(SimpleLock *lock, MLock *m) | |
3831 | { | |
3832 | MDSCacheObject *parent = lock->get_parent(); | |
3833 | if (parent->is_auth() && | |
3834 | lock->get_state() != LOCK_SYNC && | |
3835 | !parent->is_frozen()) { | |
3836 | dout(7) << "handle_reqrdlock got rdlock request on " << *lock | |
3837 | << " on " << *parent << dendl; | |
3838 | assert(parent->is_auth()); // replica auth pinned if they're doing this! | |
3839 | if (lock->is_stable()) { | |
3840 | simple_sync(lock); | |
3841 | } else { | |
3842 | dout(7) << "handle_reqrdlock delaying request until lock is stable" << dendl; | |
3843 | lock->add_waiter(SimpleLock::WAIT_STABLE | MDSCacheObject::WAIT_UNFREEZE, | |
3844 | new C_MDS_RetryMessage(mds, m->get())); | |
3845 | } | |
3846 | } else { | |
3847 | dout(7) << "handle_reqrdlock dropping rdlock request on " << *lock | |
3848 | << " on " << *parent << dendl; | |
3849 | // replica should retry | |
3850 | } | |
3851 | } | |
3852 | ||
3853 | /* This function DOES put the passed message before returning */ | |
3854 | void Locker::handle_simple_lock(SimpleLock *lock, MLock *m) | |
3855 | { | |
3856 | int from = m->get_asker(); | |
3857 | ||
3858 | dout(10) << "handle_simple_lock " << *m | |
3859 | << " on " << *lock << " " << *lock->get_parent() << dendl; | |
3860 | ||
3861 | if (mds->is_rejoin()) { | |
3862 | if (lock->get_parent()->is_rejoining()) { | |
3863 | dout(7) << "handle_simple_lock still rejoining " << *lock->get_parent() | |
3864 | << ", dropping " << *m << dendl; | |
3865 | m->put(); | |
3866 | return; | |
3867 | } | |
3868 | } | |
3869 | ||
3870 | switch (m->get_action()) { | |
3871 | // -- replica -- | |
3872 | case LOCK_AC_SYNC: | |
3873 | assert(lock->get_state() == LOCK_LOCK); | |
3874 | lock->decode_locked_state(m->get_data()); | |
3875 | lock->set_state(LOCK_SYNC); | |
3876 | lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE); | |
3877 | break; | |
3878 | ||
3879 | case LOCK_AC_LOCK: | |
3880 | assert(lock->get_state() == LOCK_SYNC); | |
3881 | lock->set_state(LOCK_SYNC_LOCK); | |
3882 | if (lock->is_leased()) | |
3883 | revoke_client_leases(lock); | |
3884 | eval_gather(lock, true); | |
31f18b77 FG |
3885 | if (lock->is_unstable_and_locked()) |
3886 | mds->mdlog->flush(); | |
7c673cae FG |
3887 | break; |
3888 | ||
3889 | ||
3890 | // -- auth -- | |
3891 | case LOCK_AC_LOCKACK: | |
3892 | assert(lock->get_state() == LOCK_SYNC_LOCK || | |
3893 | lock->get_state() == LOCK_SYNC_EXCL); | |
3894 | assert(lock->is_gathering(from)); | |
3895 | lock->remove_gather(from); | |
3896 | ||
3897 | if (lock->is_gathering()) { | |
3898 | dout(7) << "handle_simple_lock " << *lock << " on " << *lock->get_parent() << " from " << from | |
3899 | << ", still gathering " << lock->get_gather_set() << dendl; | |
3900 | } else { | |
3901 | dout(7) << "handle_simple_lock " << *lock << " on " << *lock->get_parent() << " from " << from | |
3902 | << ", last one" << dendl; | |
3903 | eval_gather(lock); | |
3904 | } | |
3905 | break; | |
3906 | ||
3907 | case LOCK_AC_REQRDLOCK: | |
3908 | handle_reqrdlock(lock, m); | |
3909 | break; | |
3910 | ||
3911 | } | |
3912 | ||
3913 | m->put(); | |
3914 | } | |
3915 | ||
3916 | /* unused, currently. | |
3917 | ||
3918 | class C_Locker_SimpleEval : public Context { | |
3919 | Locker *locker; | |
3920 | SimpleLock *lock; | |
3921 | public: | |
3922 | C_Locker_SimpleEval(Locker *l, SimpleLock *lk) : locker(l), lock(lk) {} | |
3923 | void finish(int r) { | |
3924 | locker->try_simple_eval(lock); | |
3925 | } | |
3926 | }; | |
3927 | ||
3928 | void Locker::try_simple_eval(SimpleLock *lock) | |
3929 | { | |
3930 | // unstable and ambiguous auth? | |
3931 | if (!lock->is_stable() && | |
3932 | lock->get_parent()->is_ambiguous_auth()) { | |
3933 | dout(7) << "simple_eval not stable and ambiguous auth, waiting on " << *lock->get_parent() << dendl; | |
3934 | //if (!lock->get_parent()->is_waiter(MDSCacheObject::WAIT_SINGLEAUTH)) | |
3935 | lock->get_parent()->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, new C_Locker_SimpleEval(this, lock)); | |
3936 | return; | |
3937 | } | |
3938 | ||
3939 | if (!lock->get_parent()->is_auth()) { | |
3940 | dout(7) << "try_simple_eval not auth for " << *lock->get_parent() << dendl; | |
3941 | return; | |
3942 | } | |
3943 | ||
3944 | if (!lock->get_parent()->can_auth_pin()) { | |
3945 | dout(7) << "try_simple_eval can't auth_pin, waiting on " << *lock->get_parent() << dendl; | |
3946 | //if (!lock->get_parent()->is_waiter(MDSCacheObject::WAIT_SINGLEAUTH)) | |
3947 | lock->get_parent()->add_waiter(MDSCacheObject::WAIT_UNFREEZE, new C_Locker_SimpleEval(this, lock)); | |
3948 | return; | |
3949 | } | |
3950 | ||
3951 | if (lock->is_stable()) | |
3952 | simple_eval(lock); | |
3953 | } | |
3954 | */ | |
3955 | ||
3956 | ||
3957 | void Locker::simple_eval(SimpleLock *lock, bool *need_issue) | |
3958 | { | |
3959 | dout(10) << "simple_eval " << *lock << " on " << *lock->get_parent() << dendl; | |
3960 | ||
3961 | assert(lock->get_parent()->is_auth()); | |
3962 | assert(lock->is_stable()); | |
3963 | ||
3964 | if (lock->get_parent()->is_freezing_or_frozen()) { | |
3965 | // dentry lock in unreadable state can block path traverse | |
3966 | if ((lock->get_type() != CEPH_LOCK_DN || | |
3967 | lock->get_state() == LOCK_SYNC || | |
3968 | lock->get_parent()->is_frozen())) | |
3969 | return; | |
3970 | } | |
3971 | ||
3972 | if (mdcache->is_readonly()) { | |
3973 | if (lock->get_state() != LOCK_SYNC) { | |
3974 | dout(10) << "simple_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl; | |
3975 | simple_sync(lock, need_issue); | |
3976 | } | |
3977 | return; | |
3978 | } | |
3979 | ||
3980 | CInode *in = 0; | |
3981 | int wanted = 0; | |
3982 | if (lock->get_type() != CEPH_LOCK_DN) { | |
3983 | in = static_cast<CInode*>(lock->get_parent()); | |
3984 | in->get_caps_wanted(&wanted, NULL, lock->get_cap_shift()); | |
3985 | } | |
3986 | ||
3987 | // -> excl? | |
3988 | if (lock->get_state() != LOCK_EXCL && | |
3989 | in && in->get_target_loner() >= 0 && | |
3990 | (wanted & CEPH_CAP_GEXCL)) { | |
3991 | dout(7) << "simple_eval stable, going to excl " << *lock | |
3992 | << " on " << *lock->get_parent() << dendl; | |
3993 | simple_excl(lock, need_issue); | |
3994 | } | |
3995 | ||
3996 | // stable -> sync? | |
3997 | else if (lock->get_state() != LOCK_SYNC && | |
3998 | !lock->is_wrlocked() && | |
3999 | ((!(wanted & CEPH_CAP_GEXCL) && !lock->is_waiter_for(SimpleLock::WAIT_WR)) || | |
4000 | (lock->get_state() == LOCK_EXCL && in && in->get_target_loner() < 0))) { | |
4001 | dout(7) << "simple_eval stable, syncing " << *lock | |
4002 | << " on " << *lock->get_parent() << dendl; | |
4003 | simple_sync(lock, need_issue); | |
4004 | } | |
4005 | } | |
4006 | ||
4007 | ||
4008 | // mid | |
4009 | ||
4010 | bool Locker::simple_sync(SimpleLock *lock, bool *need_issue) | |
4011 | { | |
4012 | dout(7) << "simple_sync on " << *lock << " on " << *lock->get_parent() << dendl; | |
4013 | assert(lock->get_parent()->is_auth()); | |
4014 | assert(lock->is_stable()); | |
4015 | ||
4016 | CInode *in = 0; | |
4017 | if (lock->get_cap_shift()) | |
4018 | in = static_cast<CInode *>(lock->get_parent()); | |
4019 | ||
4020 | int old_state = lock->get_state(); | |
4021 | ||
4022 | if (old_state != LOCK_TSYN) { | |
4023 | ||
4024 | switch (lock->get_state()) { | |
4025 | case LOCK_MIX: lock->set_state(LOCK_MIX_SYNC); break; | |
4026 | case LOCK_LOCK: lock->set_state(LOCK_LOCK_SYNC); break; | |
4027 | case LOCK_XSYN: lock->set_state(LOCK_XSYN_SYNC); break; | |
4028 | case LOCK_EXCL: lock->set_state(LOCK_EXCL_SYNC); break; | |
4029 | default: ceph_abort(); | |
4030 | } | |
4031 | ||
4032 | int gather = 0; | |
4033 | if (lock->is_wrlocked()) | |
4034 | gather++; | |
4035 | ||
4036 | if (lock->get_parent()->is_replicated() && old_state == LOCK_MIX) { | |
4037 | send_lock_message(lock, LOCK_AC_SYNC); | |
4038 | lock->init_gather(); | |
4039 | gather++; | |
4040 | } | |
4041 | ||
4042 | if (in && in->is_head()) { | |
4043 | if (in->issued_caps_need_gather(lock)) { | |
4044 | if (need_issue) | |
4045 | *need_issue = true; | |
4046 | else | |
4047 | issue_caps(in); | |
4048 | gather++; | |
4049 | } | |
4050 | } | |
4051 | ||
4052 | bool need_recover = false; | |
4053 | if (lock->get_type() == CEPH_LOCK_IFILE) { | |
4054 | assert(in); | |
4055 | if (in->state_test(CInode::STATE_NEEDSRECOVER)) { | |
4056 | mds->mdcache->queue_file_recover(in); | |
4057 | need_recover = true; | |
4058 | gather++; | |
4059 | } | |
4060 | } | |
4061 | ||
4062 | if (!gather && lock->is_dirty()) { | |
4063 | lock->get_parent()->auth_pin(lock); | |
4064 | scatter_writebehind(static_cast<ScatterLock*>(lock)); | |
4065 | mds->mdlog->flush(); | |
4066 | return false; | |
4067 | } | |
4068 | ||
4069 | if (gather) { | |
4070 | lock->get_parent()->auth_pin(lock); | |
4071 | if (need_recover) | |
4072 | mds->mdcache->do_file_recover(); | |
4073 | return false; | |
4074 | } | |
4075 | } | |
4076 | ||
4077 | if (lock->get_parent()->is_replicated()) { // FIXME | |
4078 | bufferlist data; | |
4079 | lock->encode_locked_state(data); | |
4080 | send_lock_message(lock, LOCK_AC_SYNC, data); | |
4081 | } | |
4082 | lock->set_state(LOCK_SYNC); | |
4083 | lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE); | |
4084 | if (in && in->is_head()) { | |
4085 | if (need_issue) | |
4086 | *need_issue = true; | |
4087 | else | |
4088 | issue_caps(in); | |
4089 | } | |
4090 | return true; | |
4091 | } | |
4092 | ||
4093 | void Locker::simple_excl(SimpleLock *lock, bool *need_issue) | |
4094 | { | |
4095 | dout(7) << "simple_excl on " << *lock << " on " << *lock->get_parent() << dendl; | |
4096 | assert(lock->get_parent()->is_auth()); | |
4097 | assert(lock->is_stable()); | |
4098 | ||
4099 | CInode *in = 0; | |
4100 | if (lock->get_cap_shift()) | |
4101 | in = static_cast<CInode *>(lock->get_parent()); | |
4102 | ||
4103 | switch (lock->get_state()) { | |
4104 | case LOCK_LOCK: lock->set_state(LOCK_LOCK_EXCL); break; | |
4105 | case LOCK_SYNC: lock->set_state(LOCK_SYNC_EXCL); break; | |
4106 | case LOCK_XSYN: lock->set_state(LOCK_XSYN_EXCL); break; | |
4107 | default: ceph_abort(); | |
4108 | } | |
4109 | ||
4110 | int gather = 0; | |
4111 | if (lock->is_rdlocked()) | |
4112 | gather++; | |
4113 | if (lock->is_wrlocked()) | |
4114 | gather++; | |
4115 | ||
4116 | if (lock->get_parent()->is_replicated() && | |
4117 | lock->get_state() != LOCK_LOCK_EXCL && | |
4118 | lock->get_state() != LOCK_XSYN_EXCL) { | |
4119 | send_lock_message(lock, LOCK_AC_LOCK); | |
4120 | lock->init_gather(); | |
4121 | gather++; | |
4122 | } | |
4123 | ||
4124 | if (in && in->is_head()) { | |
4125 | if (in->issued_caps_need_gather(lock)) { | |
4126 | if (need_issue) | |
4127 | *need_issue = true; | |
4128 | else | |
4129 | issue_caps(in); | |
4130 | gather++; | |
4131 | } | |
4132 | } | |
4133 | ||
4134 | if (gather) { | |
4135 | lock->get_parent()->auth_pin(lock); | |
4136 | } else { | |
4137 | lock->set_state(LOCK_EXCL); | |
4138 | lock->finish_waiters(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE); | |
4139 | if (in) { | |
4140 | if (need_issue) | |
4141 | *need_issue = true; | |
4142 | else | |
4143 | issue_caps(in); | |
4144 | } | |
4145 | } | |
4146 | } | |
4147 | ||
4148 | void Locker::simple_lock(SimpleLock *lock, bool *need_issue) | |
4149 | { | |
4150 | dout(7) << "simple_lock on " << *lock << " on " << *lock->get_parent() << dendl; | |
4151 | assert(lock->get_parent()->is_auth()); | |
4152 | assert(lock->is_stable()); | |
4153 | assert(lock->get_state() != LOCK_LOCK); | |
4154 | ||
4155 | CInode *in = 0; | |
4156 | if (lock->get_cap_shift()) | |
4157 | in = static_cast<CInode *>(lock->get_parent()); | |
4158 | ||
4159 | int old_state = lock->get_state(); | |
4160 | ||
4161 | switch (lock->get_state()) { | |
4162 | case LOCK_SYNC: lock->set_state(LOCK_SYNC_LOCK); break; | |
4163 | case LOCK_XSYN: | |
4164 | file_excl(static_cast<ScatterLock*>(lock), need_issue); | |
4165 | if (lock->get_state() != LOCK_EXCL) | |
4166 | return; | |
4167 | // fall-thru | |
4168 | case LOCK_EXCL: lock->set_state(LOCK_EXCL_LOCK); break; | |
4169 | case LOCK_MIX: lock->set_state(LOCK_MIX_LOCK); | |
4170 | (static_cast<ScatterLock *>(lock))->clear_unscatter_wanted(); | |
4171 | break; | |
4172 | case LOCK_TSYN: lock->set_state(LOCK_TSYN_LOCK); break; | |
4173 | default: ceph_abort(); | |
4174 | } | |
4175 | ||
4176 | int gather = 0; | |
4177 | if (lock->is_leased()) { | |
4178 | gather++; | |
4179 | revoke_client_leases(lock); | |
4180 | } | |
4181 | if (lock->is_rdlocked()) | |
4182 | gather++; | |
4183 | if (in && in->is_head()) { | |
4184 | if (in->issued_caps_need_gather(lock)) { | |
4185 | if (need_issue) | |
4186 | *need_issue = true; | |
4187 | else | |
4188 | issue_caps(in); | |
4189 | gather++; | |
4190 | } | |
4191 | } | |
4192 | ||
4193 | bool need_recover = false; | |
4194 | if (lock->get_type() == CEPH_LOCK_IFILE) { | |
4195 | assert(in); | |
4196 | if(in->state_test(CInode::STATE_NEEDSRECOVER)) { | |
4197 | mds->mdcache->queue_file_recover(in); | |
4198 | need_recover = true; | |
4199 | gather++; | |
4200 | } | |
4201 | } | |
4202 | ||
4203 | if (lock->get_parent()->is_replicated() && | |
4204 | lock->get_state() == LOCK_MIX_LOCK && | |
4205 | gather) { | |
4206 | dout(10) << " doing local stage of mix->lock gather before gathering from replicas" << dendl; | |
4207 | } else { | |
4208 | // move to second stage of gather now, so we don't send the lock action later. | |
4209 | if (lock->get_state() == LOCK_MIX_LOCK) | |
4210 | lock->set_state(LOCK_MIX_LOCK2); | |
4211 | ||
4212 | if (lock->get_parent()->is_replicated() && | |
4213 | lock->get_sm()->states[old_state].replica_state != LOCK_LOCK) { // replica may already be LOCK | |
4214 | gather++; | |
4215 | send_lock_message(lock, LOCK_AC_LOCK); | |
4216 | lock->init_gather(); | |
4217 | } | |
4218 | } | |
4219 | ||
4220 | if (!gather && lock->is_dirty()) { | |
4221 | lock->get_parent()->auth_pin(lock); | |
4222 | scatter_writebehind(static_cast<ScatterLock*>(lock)); | |
4223 | mds->mdlog->flush(); | |
4224 | return; | |
4225 | } | |
4226 | ||
4227 | if (gather) { | |
4228 | lock->get_parent()->auth_pin(lock); | |
4229 | if (need_recover) | |
4230 | mds->mdcache->do_file_recover(); | |
4231 | } else { | |
4232 | lock->set_state(LOCK_LOCK); | |
4233 | lock->finish_waiters(ScatterLock::WAIT_XLOCK|ScatterLock::WAIT_WR|ScatterLock::WAIT_STABLE); | |
4234 | } | |
4235 | } | |
4236 | ||
4237 | ||
4238 | void Locker::simple_xlock(SimpleLock *lock) | |
4239 | { | |
4240 | dout(7) << "simple_xlock on " << *lock << " on " << *lock->get_parent() << dendl; | |
4241 | assert(lock->get_parent()->is_auth()); | |
4242 | //assert(lock->is_stable()); | |
4243 | assert(lock->get_state() != LOCK_XLOCK); | |
4244 | ||
4245 | CInode *in = 0; | |
4246 | if (lock->get_cap_shift()) | |
4247 | in = static_cast<CInode *>(lock->get_parent()); | |
4248 | ||
4249 | if (lock->is_stable()) | |
4250 | lock->get_parent()->auth_pin(lock); | |
4251 | ||
4252 | switch (lock->get_state()) { | |
4253 | case LOCK_LOCK: | |
4254 | case LOCK_XLOCKDONE: lock->set_state(LOCK_LOCK_XLOCK); break; | |
4255 | default: ceph_abort(); | |
4256 | } | |
4257 | ||
4258 | int gather = 0; | |
4259 | if (lock->is_rdlocked()) | |
4260 | gather++; | |
4261 | if (lock->is_wrlocked()) | |
4262 | gather++; | |
4263 | ||
4264 | if (in && in->is_head()) { | |
4265 | if (in->issued_caps_need_gather(lock)) { | |
4266 | issue_caps(in); | |
4267 | gather++; | |
4268 | } | |
4269 | } | |
4270 | ||
4271 | if (!gather) { | |
4272 | lock->set_state(LOCK_PREXLOCK); | |
4273 | //assert("shouldn't be called if we are already xlockable" == 0); | |
4274 | } | |
4275 | } | |
4276 | ||
4277 | ||
4278 | ||
4279 | ||
4280 | ||
4281 | // ========================================================================== | |
4282 | // scatter lock | |
4283 | ||
4284 | /* | |
4285 | ||
4286 | Some notes on scatterlocks. | |
4287 | ||
4288 | - The scatter/gather is driven by the inode lock. The scatter always | |
4289 | brings in the latest metadata from the fragments. | |
4290 | ||
4291 | - When in a scattered/MIX state, fragments are only allowed to | |
4292 | update/be written to if the accounted stat matches the inode's | |
4293 | current version. | |
4294 | ||
4295 | - That means, on gather, we _only_ assimilate diffs for frag metadata | |
4296 | that match the current version, because those are the only ones | |
4297 | written during this scatter/gather cycle. (Others didn't permit | |
4298 | it.) We increment the version and journal this to disk. | |
4299 | ||
4300 | - When possible, we also simultaneously update our local frag | |
4301 | accounted stats to match. | |
4302 | ||
4303 | - On scatter, the new inode info is broadcast to frags, both local | |
4304 | and remote. If possible (auth and !frozen), the dirfrag auth | |
4305 | should update the accounted state (if it isn't already up to date). | |
4306 | Note that this may occur on both the local inode auth node and | |
4307 | inode replicas, so there are two potential paths. If it is NOT | |
4308 | possible, they need to mark_stale to prevent any possible writes. | |
4309 | ||
4310 | - A scatter can be to MIX (potentially writeable) or to SYNC (read | |
4311 | only). Both are opportunities to update the frag accounted stats, | |
4312 | even though only the MIX case is affected by a stale dirfrag. | |
4313 | ||
4314 | - Because many scatter/gather cycles can potentially go by without a | |
4315 | frag being able to update its accounted stats (due to being frozen | |
4316 | by exports/refragments in progress), the frag may have (even very) | |
4317 | old stat versions. That's fine. If when we do want to update it, | |
4318 | we can update accounted_* and the version first. | |
4319 | ||
4320 | */ | |
4321 | ||
4322 | class C_Locker_ScatterWB : public LockerLogContext { | |
4323 | ScatterLock *lock; | |
4324 | MutationRef mut; | |
4325 | public: | |
4326 | C_Locker_ScatterWB(Locker *l, ScatterLock *sl, MutationRef& m) : | |
4327 | LockerLogContext(l), lock(sl), mut(m) {} | |
4328 | void finish(int r) override { | |
4329 | locker->scatter_writebehind_finish(lock, mut); | |
4330 | } | |
4331 | }; | |
4332 | ||
4333 | void Locker::scatter_writebehind(ScatterLock *lock) | |
4334 | { | |
4335 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4336 | dout(10) << "scatter_writebehind " << in->inode.mtime << " on " << *lock << " on " << *in << dendl; | |
4337 | ||
4338 | // journal | |
4339 | MutationRef mut(new MutationImpl()); | |
4340 | mut->ls = mds->mdlog->get_current_segment(); | |
4341 | ||
4342 | // forcefully take a wrlock | |
4343 | lock->get_wrlock(true); | |
4344 | mut->wrlocks.insert(lock); | |
4345 | mut->locks.insert(lock); | |
4346 | ||
4347 | in->pre_cow_old_inode(); // avoid cow mayhem | |
4348 | ||
4349 | inode_t *pi = in->project_inode(); | |
4350 | pi->version = in->pre_dirty(); | |
4351 | ||
4352 | in->finish_scatter_gather_update(lock->get_type()); | |
4353 | lock->start_flush(); | |
4354 | ||
4355 | EUpdate *le = new EUpdate(mds->mdlog, "scatter_writebehind"); | |
4356 | mds->mdlog->start_entry(le); | |
4357 | ||
4358 | mdcache->predirty_journal_parents(mut, &le->metablob, in, 0, PREDIRTY_PRIMARY); | |
4359 | mdcache->journal_dirty_inode(mut.get(), &le->metablob, in); | |
4360 | ||
4361 | in->finish_scatter_gather_update_accounted(lock->get_type(), mut, &le->metablob); | |
4362 | ||
4363 | mds->mdlog->submit_entry(le, new C_Locker_ScatterWB(this, lock, mut)); | |
4364 | } | |
4365 | ||
4366 | void Locker::scatter_writebehind_finish(ScatterLock *lock, MutationRef& mut) | |
4367 | { | |
4368 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4369 | dout(10) << "scatter_writebehind_finish on " << *lock << " on " << *in << dendl; | |
4370 | in->pop_and_dirty_projected_inode(mut->ls); | |
4371 | ||
4372 | lock->finish_flush(); | |
4373 | ||
4374 | // if replicas may have flushed in a mix->lock state, send another | |
4375 | // message so they can finish_flush(). | |
4376 | if (in->is_replicated()) { | |
4377 | switch (lock->get_state()) { | |
4378 | case LOCK_MIX_LOCK: | |
4379 | case LOCK_MIX_LOCK2: | |
4380 | case LOCK_MIX_EXCL: | |
4381 | case LOCK_MIX_TSYN: | |
4382 | send_lock_message(lock, LOCK_AC_LOCKFLUSHED); | |
4383 | } | |
4384 | } | |
4385 | ||
4386 | mut->apply(); | |
4387 | drop_locks(mut.get()); | |
4388 | mut->cleanup(); | |
4389 | ||
4390 | if (lock->is_stable()) | |
4391 | lock->finish_waiters(ScatterLock::WAIT_STABLE); | |
4392 | ||
4393 | //scatter_eval_gather(lock); | |
4394 | } | |
4395 | ||
4396 | void Locker::scatter_eval(ScatterLock *lock, bool *need_issue) | |
4397 | { | |
4398 | dout(10) << "scatter_eval " << *lock << " on " << *lock->get_parent() << dendl; | |
4399 | ||
4400 | assert(lock->get_parent()->is_auth()); | |
4401 | assert(lock->is_stable()); | |
4402 | ||
4403 | if (lock->get_parent()->is_freezing_or_frozen()) { | |
4404 | dout(20) << " freezing|frozen" << dendl; | |
4405 | return; | |
4406 | } | |
4407 | ||
4408 | if (mdcache->is_readonly()) { | |
4409 | if (lock->get_state() != LOCK_SYNC) { | |
4410 | dout(10) << "scatter_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl; | |
4411 | simple_sync(lock, need_issue); | |
4412 | } | |
4413 | return; | |
4414 | } | |
4415 | ||
4416 | if (!lock->is_rdlocked() && | |
4417 | lock->get_state() != LOCK_MIX && | |
4418 | lock->get_scatter_wanted()) { | |
4419 | dout(10) << "scatter_eval scatter_wanted, bump to mix " << *lock | |
4420 | << " on " << *lock->get_parent() << dendl; | |
4421 | scatter_mix(lock, need_issue); | |
4422 | return; | |
4423 | } | |
4424 | ||
4425 | if (lock->get_type() == CEPH_LOCK_INEST) { | |
4426 | // in general, we want to keep INEST writable at all times. | |
4427 | if (!lock->is_rdlocked()) { | |
4428 | if (lock->get_parent()->is_replicated()) { | |
4429 | if (lock->get_state() != LOCK_MIX) | |
4430 | scatter_mix(lock, need_issue); | |
4431 | } else { | |
4432 | if (lock->get_state() != LOCK_LOCK) | |
4433 | simple_lock(lock, need_issue); | |
4434 | } | |
4435 | } | |
4436 | return; | |
4437 | } | |
4438 | ||
4439 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4440 | if (!in->has_subtree_or_exporting_dirfrag() || in->is_base()) { | |
4441 | // i _should_ be sync. | |
4442 | if (!lock->is_wrlocked() && | |
4443 | lock->get_state() != LOCK_SYNC) { | |
4444 | dout(10) << "scatter_eval no wrlocks|xlocks, not subtree root inode, syncing" << dendl; | |
4445 | simple_sync(lock, need_issue); | |
4446 | } | |
4447 | } | |
4448 | } | |
4449 | ||
4450 | ||
4451 | /* | |
4452 | * mark a scatterlock to indicate that the dir fnode has some dirty data | |
4453 | */ | |
4454 | void Locker::mark_updated_scatterlock(ScatterLock *lock) | |
4455 | { | |
4456 | lock->mark_dirty(); | |
4457 | if (lock->get_updated_item()->is_on_list()) { | |
4458 | dout(10) << "mark_updated_scatterlock " << *lock | |
4459 | << " - already on list since " << lock->get_update_stamp() << dendl; | |
4460 | } else { | |
4461 | updated_scatterlocks.push_back(lock->get_updated_item()); | |
4462 | utime_t now = ceph_clock_now(); | |
4463 | lock->set_update_stamp(now); | |
4464 | dout(10) << "mark_updated_scatterlock " << *lock | |
4465 | << " - added at " << now << dendl; | |
4466 | } | |
4467 | } | |
4468 | ||
4469 | /* | |
4470 | * this is called by scatter_tick and LogSegment::try_to_trim() when | |
4471 | * trying to flush dirty scattered data (i.e. updated fnode) back to | |
4472 | * the inode. | |
4473 | * | |
4474 | * we need to lock|scatter in order to push fnode changes into the | |
4475 | * inode.dirstat. | |
4476 | */ | |
4477 | void Locker::scatter_nudge(ScatterLock *lock, MDSInternalContextBase *c, bool forcelockchange) | |
4478 | { | |
4479 | CInode *p = static_cast<CInode *>(lock->get_parent()); | |
4480 | ||
4481 | if (p->is_frozen() || p->is_freezing()) { | |
4482 | dout(10) << "scatter_nudge waiting for unfreeze on " << *p << dendl; | |
4483 | if (c) | |
4484 | p->add_waiter(MDSCacheObject::WAIT_UNFREEZE, c); | |
4485 | else | |
4486 | // just requeue. not ideal.. starvation prone.. | |
4487 | updated_scatterlocks.push_back(lock->get_updated_item()); | |
4488 | return; | |
4489 | } | |
4490 | ||
4491 | if (p->is_ambiguous_auth()) { | |
4492 | dout(10) << "scatter_nudge waiting for single auth on " << *p << dendl; | |
4493 | if (c) | |
4494 | p->add_waiter(MDSCacheObject::WAIT_SINGLEAUTH, c); | |
4495 | else | |
4496 | // just requeue. not ideal.. starvation prone.. | |
4497 | updated_scatterlocks.push_back(lock->get_updated_item()); | |
4498 | return; | |
4499 | } | |
4500 | ||
4501 | if (p->is_auth()) { | |
4502 | int count = 0; | |
4503 | while (true) { | |
4504 | if (lock->is_stable()) { | |
4505 | // can we do it now? | |
4506 | // (only if we're not replicated.. if we are, we really do need | |
4507 | // to nudge the lock state!) | |
4508 | /* | |
4509 | actually, even if we're not replicated, we can't stay in MIX, because another mds | |
4510 | could discover and replicate us at any time. if that happens while we're flushing, | |
4511 | they end up in MIX but their inode has the old scatterstat version. | |
4512 | ||
4513 | if (!forcelockchange && !lock->get_parent()->is_replicated() && lock->can_wrlock(-1)) { | |
4514 | dout(10) << "scatter_nudge auth, propagating " << *lock << " on " << *p << dendl; | |
4515 | scatter_writebehind(lock); | |
4516 | if (c) | |
4517 | lock->add_waiter(SimpleLock::WAIT_STABLE, c); | |
4518 | return; | |
4519 | } | |
4520 | */ | |
4521 | ||
4522 | if (mdcache->is_readonly()) { | |
4523 | if (lock->get_state() != LOCK_SYNC) { | |
4524 | dout(10) << "scatter_nudge auth, read-only FS, syncing " << *lock << " on " << *p << dendl; | |
4525 | simple_sync(static_cast<ScatterLock*>(lock)); | |
4526 | } | |
4527 | break; | |
4528 | } | |
4529 | ||
4530 | // adjust lock state | |
4531 | dout(10) << "scatter_nudge auth, scatter/unscattering " << *lock << " on " << *p << dendl; | |
4532 | switch (lock->get_type()) { | |
4533 | case CEPH_LOCK_IFILE: | |
4534 | if (p->is_replicated() && lock->get_state() != LOCK_MIX) | |
4535 | scatter_mix(static_cast<ScatterLock*>(lock)); | |
4536 | else if (lock->get_state() != LOCK_LOCK) | |
4537 | simple_lock(static_cast<ScatterLock*>(lock)); | |
4538 | else | |
4539 | simple_sync(static_cast<ScatterLock*>(lock)); | |
4540 | break; | |
4541 | ||
4542 | case CEPH_LOCK_IDFT: | |
4543 | case CEPH_LOCK_INEST: | |
4544 | if (p->is_replicated() && lock->get_state() != LOCK_MIX) | |
4545 | scatter_mix(lock); | |
4546 | else if (lock->get_state() != LOCK_LOCK) | |
4547 | simple_lock(lock); | |
4548 | else | |
4549 | simple_sync(lock); | |
4550 | break; | |
4551 | default: | |
4552 | ceph_abort(); | |
4553 | } | |
4554 | ++count; | |
4555 | if (lock->is_stable() && count == 2) { | |
4556 | dout(10) << "scatter_nudge oh, stable after two cycles." << dendl; | |
4557 | // this should only realy happen when called via | |
4558 | // handle_file_lock due to AC_NUDGE, because the rest of the | |
4559 | // time we are replicated or have dirty data and won't get | |
4560 | // called. bailing here avoids an infinite loop. | |
4561 | assert(!c); | |
4562 | break; | |
4563 | } | |
4564 | } else { | |
4565 | dout(10) << "scatter_nudge auth, waiting for stable " << *lock << " on " << *p << dendl; | |
4566 | if (c) | |
4567 | lock->add_waiter(SimpleLock::WAIT_STABLE, c); | |
4568 | return; | |
4569 | } | |
4570 | } | |
4571 | } else { | |
4572 | dout(10) << "scatter_nudge replica, requesting scatter/unscatter of " | |
4573 | << *lock << " on " << *p << dendl; | |
4574 | // request unscatter? | |
4575 | mds_rank_t auth = lock->get_parent()->authority().first; | |
4576 | if (!mds->is_cluster_degraded() || | |
4577 | mds->mdsmap->is_clientreplay_or_active_or_stopping(auth)) | |
4578 | mds->send_message_mds(new MLock(lock, LOCK_AC_NUDGE, mds->get_nodeid()), auth); | |
4579 | ||
4580 | // wait... | |
4581 | if (c) | |
4582 | lock->add_waiter(SimpleLock::WAIT_STABLE, c); | |
4583 | ||
4584 | // also, requeue, in case we had wrong auth or something | |
4585 | updated_scatterlocks.push_back(lock->get_updated_item()); | |
4586 | } | |
4587 | } | |
4588 | ||
4589 | void Locker::scatter_tick() | |
4590 | { | |
4591 | dout(10) << "scatter_tick" << dendl; | |
4592 | ||
4593 | // updated | |
4594 | utime_t now = ceph_clock_now(); | |
4595 | int n = updated_scatterlocks.size(); | |
4596 | while (!updated_scatterlocks.empty()) { | |
4597 | ScatterLock *lock = updated_scatterlocks.front(); | |
4598 | ||
4599 | if (n-- == 0) break; // scatter_nudge() may requeue; avoid looping | |
4600 | ||
4601 | if (!lock->is_dirty()) { | |
4602 | updated_scatterlocks.pop_front(); | |
4603 | dout(10) << " removing from updated_scatterlocks " | |
4604 | << *lock << " " << *lock->get_parent() << dendl; | |
4605 | continue; | |
4606 | } | |
4607 | if (now - lock->get_update_stamp() < g_conf->mds_scatter_nudge_interval) | |
4608 | break; | |
4609 | updated_scatterlocks.pop_front(); | |
4610 | scatter_nudge(lock, 0); | |
4611 | } | |
4612 | mds->mdlog->flush(); | |
4613 | } | |
4614 | ||
4615 | ||
4616 | void Locker::scatter_tempsync(ScatterLock *lock, bool *need_issue) | |
4617 | { | |
4618 | dout(10) << "scatter_tempsync " << *lock | |
4619 | << " on " << *lock->get_parent() << dendl; | |
4620 | assert(lock->get_parent()->is_auth()); | |
4621 | assert(lock->is_stable()); | |
4622 | ||
4623 | assert(0 == "not fully implemented, at least not for filelock"); | |
4624 | ||
4625 | CInode *in = static_cast<CInode *>(lock->get_parent()); | |
4626 | ||
4627 | switch (lock->get_state()) { | |
4628 | case LOCK_SYNC: ceph_abort(); // this shouldn't happen | |
4629 | case LOCK_LOCK: lock->set_state(LOCK_LOCK_TSYN); break; | |
4630 | case LOCK_MIX: lock->set_state(LOCK_MIX_TSYN); break; | |
4631 | default: ceph_abort(); | |
4632 | } | |
4633 | ||
4634 | int gather = 0; | |
4635 | if (lock->is_wrlocked()) | |
4636 | gather++; | |
4637 | ||
4638 | if (lock->get_cap_shift() && | |
4639 | in->is_head() && | |
4640 | in->issued_caps_need_gather(lock)) { | |
4641 | if (need_issue) | |
4642 | *need_issue = true; | |
4643 | else | |
4644 | issue_caps(in); | |
4645 | gather++; | |
4646 | } | |
4647 | ||
4648 | if (lock->get_state() == LOCK_MIX_TSYN && | |
4649 | in->is_replicated()) { | |
4650 | lock->init_gather(); | |
4651 | send_lock_message(lock, LOCK_AC_LOCK); | |
4652 | gather++; | |
4653 | } | |
4654 | ||
4655 | if (gather) { | |
4656 | in->auth_pin(lock); | |
4657 | } else { | |
4658 | // do tempsync | |
4659 | lock->set_state(LOCK_TSYN); | |
4660 | lock->finish_waiters(ScatterLock::WAIT_RD|ScatterLock::WAIT_STABLE); | |
4661 | if (lock->get_cap_shift()) { | |
4662 | if (need_issue) | |
4663 | *need_issue = true; | |
4664 | else | |
4665 | issue_caps(in); | |
4666 | } | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | ||
4671 | ||
4672 | // ========================================================================== | |
4673 | // local lock | |
4674 | ||
4675 | void Locker::local_wrlock_grab(LocalLock *lock, MutationRef& mut) | |
4676 | { | |
4677 | dout(7) << "local_wrlock_grab on " << *lock | |
4678 | << " on " << *lock->get_parent() << dendl; | |
4679 | ||
4680 | assert(lock->get_parent()->is_auth()); | |
4681 | assert(lock->can_wrlock()); | |
4682 | assert(!mut->wrlocks.count(lock)); | |
4683 | lock->get_wrlock(mut->get_client()); | |
4684 | mut->wrlocks.insert(lock); | |
4685 | mut->locks.insert(lock); | |
4686 | } | |
4687 | ||
4688 | bool Locker::local_wrlock_start(LocalLock *lock, MDRequestRef& mut) | |
4689 | { | |
4690 | dout(7) << "local_wrlock_start on " << *lock | |
4691 | << " on " << *lock->get_parent() << dendl; | |
4692 | ||
4693 | assert(lock->get_parent()->is_auth()); | |
4694 | if (lock->can_wrlock()) { | |
4695 | assert(!mut->wrlocks.count(lock)); | |
4696 | lock->get_wrlock(mut->get_client()); | |
4697 | mut->wrlocks.insert(lock); | |
4698 | mut->locks.insert(lock); | |
4699 | return true; | |
4700 | } else { | |
4701 | lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut)); | |
4702 | return false; | |
4703 | } | |
4704 | } | |
4705 | ||
4706 | void Locker::local_wrlock_finish(LocalLock *lock, MutationImpl *mut) | |
4707 | { | |
4708 | dout(7) << "local_wrlock_finish on " << *lock | |
4709 | << " on " << *lock->get_parent() << dendl; | |
4710 | lock->put_wrlock(); | |
4711 | mut->wrlocks.erase(lock); | |
4712 | mut->locks.erase(lock); | |
4713 | if (lock->get_num_wrlocks() == 0) { | |
4714 | lock->finish_waiters(SimpleLock::WAIT_STABLE | | |
4715 | SimpleLock::WAIT_WR | | |
4716 | SimpleLock::WAIT_RD); | |
4717 | } | |
4718 | } | |
4719 | ||
4720 | bool Locker::local_xlock_start(LocalLock *lock, MDRequestRef& mut) | |
4721 | { | |
4722 | dout(7) << "local_xlock_start on " << *lock | |
4723 | << " on " << *lock->get_parent() << dendl; | |
4724 | ||
4725 | assert(lock->get_parent()->is_auth()); | |
4726 | if (!lock->can_xlock_local()) { | |
4727 | lock->add_waiter(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE, new C_MDS_RetryRequest(mdcache, mut)); | |
4728 | return false; | |
4729 | } | |
4730 | ||
4731 | lock->get_xlock(mut, mut->get_client()); | |
4732 | mut->xlocks.insert(lock); | |
4733 | mut->locks.insert(lock); | |
4734 | return true; | |
4735 | } | |
4736 | ||
4737 | void Locker::local_xlock_finish(LocalLock *lock, MutationImpl *mut) | |
4738 | { | |
4739 | dout(7) << "local_xlock_finish on " << *lock | |
4740 | << " on " << *lock->get_parent() << dendl; | |
4741 | lock->put_xlock(); | |
4742 | mut->xlocks.erase(lock); | |
4743 | mut->locks.erase(lock); | |
4744 | ||
4745 | lock->finish_waiters(SimpleLock::WAIT_STABLE | | |
4746 | SimpleLock::WAIT_WR | | |
4747 | SimpleLock::WAIT_RD); | |
4748 | } | |
4749 | ||
4750 | ||
4751 | ||
4752 | // ========================================================================== | |
4753 | // file lock | |
4754 | ||
4755 | ||
4756 | void Locker::file_eval(ScatterLock *lock, bool *need_issue) | |
4757 | { | |
4758 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4759 | int loner_wanted, other_wanted; | |
4760 | int wanted = in->get_caps_wanted(&loner_wanted, &other_wanted, CEPH_CAP_SFILE); | |
4761 | dout(7) << "file_eval wanted=" << gcap_string(wanted) | |
4762 | << " loner_wanted=" << gcap_string(loner_wanted) | |
4763 | << " other_wanted=" << gcap_string(other_wanted) | |
4764 | << " filelock=" << *lock << " on " << *lock->get_parent() | |
4765 | << dendl; | |
4766 | ||
4767 | assert(lock->get_parent()->is_auth()); | |
4768 | assert(lock->is_stable()); | |
4769 | ||
4770 | if (lock->get_parent()->is_freezing_or_frozen()) | |
4771 | return; | |
4772 | ||
4773 | if (mdcache->is_readonly()) { | |
4774 | if (lock->get_state() != LOCK_SYNC) { | |
4775 | dout(10) << "file_eval read-only FS, syncing " << *lock << " on " << *lock->get_parent() << dendl; | |
4776 | simple_sync(lock, need_issue); | |
4777 | } | |
4778 | return; | |
4779 | } | |
4780 | ||
4781 | // excl -> *? | |
4782 | if (lock->get_state() == LOCK_EXCL) { | |
4783 | dout(20) << " is excl" << dendl; | |
4784 | int loner_issued, other_issued, xlocker_issued; | |
4785 | in->get_caps_issued(&loner_issued, &other_issued, &xlocker_issued, CEPH_CAP_SFILE); | |
4786 | dout(7) << "file_eval loner_issued=" << gcap_string(loner_issued) | |
4787 | << " other_issued=" << gcap_string(other_issued) | |
4788 | << " xlocker_issued=" << gcap_string(xlocker_issued) | |
4789 | << dendl; | |
4790 | if (!((loner_wanted|loner_issued) & (CEPH_CAP_GEXCL|CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) || | |
4791 | (other_wanted & (CEPH_CAP_GEXCL|CEPH_CAP_GWR|CEPH_CAP_GRD)) || | |
4792 | (in->inode.is_dir() && in->multiple_nonstale_caps())) { // FIXME.. :/ | |
4793 | dout(20) << " should lose it" << dendl; | |
4794 | // we should lose it. | |
4795 | // loner other want | |
4796 | // R R SYNC | |
4797 | // R R|W MIX | |
4798 | // R W MIX | |
4799 | // R|W R MIX | |
4800 | // R|W R|W MIX | |
4801 | // R|W W MIX | |
4802 | // W R MIX | |
4803 | // W R|W MIX | |
4804 | // W W MIX | |
4805 | // -> any writer means MIX; RD doesn't matter. | |
4806 | if (((other_wanted|loner_wanted) & CEPH_CAP_GWR) || | |
4807 | lock->is_waiter_for(SimpleLock::WAIT_WR)) | |
4808 | scatter_mix(lock, need_issue); | |
4809 | else if (!lock->is_wrlocked()) // let excl wrlocks drain first | |
4810 | simple_sync(lock, need_issue); | |
4811 | else | |
4812 | dout(10) << " waiting for wrlock to drain" << dendl; | |
4813 | } | |
4814 | } | |
4815 | ||
4816 | // * -> excl? | |
4817 | else if (lock->get_state() != LOCK_EXCL && | |
4818 | !lock->is_rdlocked() && | |
4819 | //!lock->is_waiter_for(SimpleLock::WAIT_WR) && | |
4820 | ((wanted & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) || | |
4821 | (in->inode.is_dir() && !in->has_subtree_or_exporting_dirfrag())) && | |
4822 | in->get_target_loner() >= 0) { | |
4823 | dout(7) << "file_eval stable, bump to loner " << *lock | |
4824 | << " on " << *lock->get_parent() << dendl; | |
4825 | file_excl(lock, need_issue); | |
4826 | } | |
4827 | ||
4828 | // * -> mixed? | |
4829 | else if (lock->get_state() != LOCK_MIX && | |
4830 | !lock->is_rdlocked() && | |
4831 | //!lock->is_waiter_for(SimpleLock::WAIT_WR) && | |
4832 | (lock->get_scatter_wanted() || | |
4833 | (in->get_wanted_loner() < 0 && (wanted & CEPH_CAP_GWR)))) { | |
4834 | dout(7) << "file_eval stable, bump to mixed " << *lock | |
4835 | << " on " << *lock->get_parent() << dendl; | |
4836 | scatter_mix(lock, need_issue); | |
4837 | } | |
4838 | ||
4839 | // * -> sync? | |
4840 | else if (lock->get_state() != LOCK_SYNC && | |
4841 | !lock->is_wrlocked() && // drain wrlocks first! | |
4842 | !lock->is_waiter_for(SimpleLock::WAIT_WR) && | |
4843 | !(wanted & (CEPH_CAP_GWR|CEPH_CAP_GBUFFER)) && | |
4844 | !((lock->get_state() == LOCK_MIX) && | |
4845 | in->is_dir() && in->has_subtree_or_exporting_dirfrag()) // if we are a delegation point, stay where we are | |
4846 | //((wanted & CEPH_CAP_RD) || | |
4847 | //in->is_replicated() || | |
4848 | //lock->get_num_client_lease() || | |
4849 | //(!loner && lock->get_state() == LOCK_EXCL)) && | |
4850 | ) { | |
4851 | dout(7) << "file_eval stable, bump to sync " << *lock | |
4852 | << " on " << *lock->get_parent() << dendl; | |
4853 | simple_sync(lock, need_issue); | |
4854 | } | |
4855 | } | |
4856 | ||
4857 | ||
4858 | ||
4859 | void Locker::scatter_mix(ScatterLock *lock, bool *need_issue) | |
4860 | { | |
4861 | dout(7) << "scatter_mix " << *lock << " on " << *lock->get_parent() << dendl; | |
4862 | ||
4863 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4864 | assert(in->is_auth()); | |
4865 | assert(lock->is_stable()); | |
4866 | ||
4867 | if (lock->get_state() == LOCK_LOCK) { | |
4868 | in->start_scatter(lock); | |
4869 | if (in->is_replicated()) { | |
4870 | // data | |
4871 | bufferlist softdata; | |
4872 | lock->encode_locked_state(softdata); | |
4873 | ||
4874 | // bcast to replicas | |
4875 | send_lock_message(lock, LOCK_AC_MIX, softdata); | |
4876 | } | |
4877 | ||
4878 | // change lock | |
4879 | lock->set_state(LOCK_MIX); | |
4880 | lock->clear_scatter_wanted(); | |
4881 | if (lock->get_cap_shift()) { | |
4882 | if (need_issue) | |
4883 | *need_issue = true; | |
4884 | else | |
4885 | issue_caps(in); | |
4886 | } | |
4887 | } else { | |
4888 | // gather? | |
4889 | switch (lock->get_state()) { | |
4890 | case LOCK_SYNC: lock->set_state(LOCK_SYNC_MIX); break; | |
4891 | case LOCK_XSYN: | |
4892 | file_excl(lock, need_issue); | |
4893 | if (lock->get_state() != LOCK_EXCL) | |
4894 | return; | |
4895 | // fall-thru | |
4896 | case LOCK_EXCL: lock->set_state(LOCK_EXCL_MIX); break; | |
4897 | case LOCK_TSYN: lock->set_state(LOCK_TSYN_MIX); break; | |
4898 | default: ceph_abort(); | |
4899 | } | |
4900 | ||
4901 | int gather = 0; | |
4902 | if (lock->is_rdlocked()) | |
4903 | gather++; | |
4904 | if (in->is_replicated()) { | |
4905 | if (lock->get_state() != LOCK_EXCL_MIX && // EXCL replica is already LOCK | |
4906 | lock->get_state() != LOCK_XSYN_EXCL) { // XSYN replica is already LOCK; ** FIXME here too! | |
4907 | send_lock_message(lock, LOCK_AC_MIX); | |
4908 | lock->init_gather(); | |
4909 | gather++; | |
4910 | } | |
4911 | } | |
4912 | if (lock->is_leased()) { | |
4913 | revoke_client_leases(lock); | |
4914 | gather++; | |
4915 | } | |
4916 | if (lock->get_cap_shift() && | |
4917 | in->is_head() && | |
4918 | in->issued_caps_need_gather(lock)) { | |
4919 | if (need_issue) | |
4920 | *need_issue = true; | |
4921 | else | |
4922 | issue_caps(in); | |
4923 | gather++; | |
4924 | } | |
4925 | bool need_recover = false; | |
4926 | if (in->state_test(CInode::STATE_NEEDSRECOVER)) { | |
4927 | mds->mdcache->queue_file_recover(in); | |
4928 | need_recover = true; | |
4929 | gather++; | |
4930 | } | |
4931 | ||
4932 | if (gather) { | |
4933 | lock->get_parent()->auth_pin(lock); | |
4934 | if (need_recover) | |
4935 | mds->mdcache->do_file_recover(); | |
4936 | } else { | |
4937 | in->start_scatter(lock); | |
4938 | lock->set_state(LOCK_MIX); | |
4939 | lock->clear_scatter_wanted(); | |
4940 | if (in->is_replicated()) { | |
4941 | bufferlist softdata; | |
4942 | lock->encode_locked_state(softdata); | |
4943 | send_lock_message(lock, LOCK_AC_MIX, softdata); | |
4944 | } | |
4945 | if (lock->get_cap_shift()) { | |
4946 | if (need_issue) | |
4947 | *need_issue = true; | |
4948 | else | |
4949 | issue_caps(in); | |
4950 | } | |
4951 | } | |
4952 | } | |
4953 | } | |
4954 | ||
4955 | ||
4956 | void Locker::file_excl(ScatterLock *lock, bool *need_issue) | |
4957 | { | |
4958 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
4959 | dout(7) << "file_excl " << *lock << " on " << *lock->get_parent() << dendl; | |
4960 | ||
4961 | assert(in->is_auth()); | |
4962 | assert(lock->is_stable()); | |
4963 | ||
4964 | assert((in->get_loner() >= 0 && in->mds_caps_wanted.empty()) || | |
4965 | (lock->get_state() == LOCK_XSYN)); // must do xsyn -> excl -> <anything else> | |
4966 | ||
4967 | switch (lock->get_state()) { | |
4968 | case LOCK_SYNC: lock->set_state(LOCK_SYNC_EXCL); break; | |
4969 | case LOCK_MIX: lock->set_state(LOCK_MIX_EXCL); break; | |
4970 | case LOCK_LOCK: lock->set_state(LOCK_LOCK_EXCL); break; | |
4971 | case LOCK_XSYN: lock->set_state(LOCK_XSYN_EXCL); break; | |
4972 | default: ceph_abort(); | |
4973 | } | |
4974 | int gather = 0; | |
4975 | ||
4976 | if (lock->is_rdlocked()) | |
4977 | gather++; | |
4978 | if (lock->is_wrlocked()) | |
4979 | gather++; | |
4980 | ||
4981 | if (in->is_replicated() && | |
4982 | lock->get_state() != LOCK_LOCK_EXCL && | |
4983 | lock->get_state() != LOCK_XSYN_EXCL) { // if we were lock, replicas are already lock. | |
4984 | send_lock_message(lock, LOCK_AC_LOCK); | |
4985 | lock->init_gather(); | |
4986 | gather++; | |
4987 | } | |
4988 | if (lock->is_leased()) { | |
4989 | revoke_client_leases(lock); | |
4990 | gather++; | |
4991 | } | |
4992 | if (in->is_head() && | |
4993 | in->issued_caps_need_gather(lock)) { | |
4994 | if (need_issue) | |
4995 | *need_issue = true; | |
4996 | else | |
4997 | issue_caps(in); | |
4998 | gather++; | |
4999 | } | |
5000 | bool need_recover = false; | |
5001 | if (in->state_test(CInode::STATE_NEEDSRECOVER)) { | |
5002 | mds->mdcache->queue_file_recover(in); | |
5003 | need_recover = true; | |
5004 | gather++; | |
5005 | } | |
5006 | ||
5007 | if (gather) { | |
5008 | lock->get_parent()->auth_pin(lock); | |
5009 | if (need_recover) | |
5010 | mds->mdcache->do_file_recover(); | |
5011 | } else { | |
5012 | lock->set_state(LOCK_EXCL); | |
5013 | if (need_issue) | |
5014 | *need_issue = true; | |
5015 | else | |
5016 | issue_caps(in); | |
5017 | } | |
5018 | } | |
5019 | ||
5020 | void Locker::file_xsyn(SimpleLock *lock, bool *need_issue) | |
5021 | { | |
5022 | dout(7) << "file_xsyn on " << *lock << " on " << *lock->get_parent() << dendl; | |
5023 | CInode *in = static_cast<CInode *>(lock->get_parent()); | |
5024 | assert(in->is_auth()); | |
5025 | assert(in->get_loner() >= 0 && in->mds_caps_wanted.empty()); | |
5026 | ||
5027 | switch (lock->get_state()) { | |
5028 | case LOCK_EXCL: lock->set_state(LOCK_EXCL_XSYN); break; | |
5029 | default: ceph_abort(); | |
5030 | } | |
5031 | ||
5032 | int gather = 0; | |
5033 | if (lock->is_wrlocked()) | |
5034 | gather++; | |
5035 | ||
5036 | if (in->is_head() && | |
5037 | in->issued_caps_need_gather(lock)) { | |
5038 | if (need_issue) | |
5039 | *need_issue = true; | |
5040 | else | |
5041 | issue_caps(in); | |
5042 | gather++; | |
5043 | } | |
5044 | ||
5045 | if (gather) { | |
5046 | lock->get_parent()->auth_pin(lock); | |
5047 | } else { | |
5048 | lock->set_state(LOCK_XSYN); | |
5049 | lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE); | |
5050 | if (need_issue) | |
5051 | *need_issue = true; | |
5052 | else | |
5053 | issue_caps(in); | |
5054 | } | |
5055 | } | |
5056 | ||
5057 | void Locker::file_recover(ScatterLock *lock) | |
5058 | { | |
5059 | CInode *in = static_cast<CInode *>(lock->get_parent()); | |
5060 | dout(7) << "file_recover " << *lock << " on " << *in << dendl; | |
5061 | ||
5062 | assert(in->is_auth()); | |
5063 | //assert(lock->is_stable()); | |
5064 | assert(lock->get_state() == LOCK_PRE_SCAN); // only called from MDCache::start_files_to_recover() | |
5065 | ||
5066 | int gather = 0; | |
5067 | ||
5068 | /* | |
5069 | if (in->is_replicated() | |
5070 | lock->get_sm()->states[oldstate].replica_state != LOCK_LOCK) { | |
5071 | send_lock_message(lock, LOCK_AC_LOCK); | |
5072 | lock->init_gather(); | |
5073 | gather++; | |
5074 | } | |
5075 | */ | |
5076 | if (in->is_head() && | |
5077 | in->issued_caps_need_gather(lock)) { | |
5078 | issue_caps(in); | |
5079 | gather++; | |
5080 | } | |
5081 | ||
5082 | lock->set_state(LOCK_SCAN); | |
5083 | if (gather) | |
5084 | in->state_set(CInode::STATE_NEEDSRECOVER); | |
5085 | else | |
5086 | mds->mdcache->queue_file_recover(in); | |
5087 | } | |
5088 | ||
5089 | ||
5090 | // messenger | |
5091 | /* This function DOES put the passed message before returning */ | |
5092 | void Locker::handle_file_lock(ScatterLock *lock, MLock *m) | |
5093 | { | |
5094 | CInode *in = static_cast<CInode*>(lock->get_parent()); | |
5095 | int from = m->get_asker(); | |
5096 | ||
5097 | if (mds->is_rejoin()) { | |
5098 | if (in->is_rejoining()) { | |
5099 | dout(7) << "handle_file_lock still rejoining " << *in | |
5100 | << ", dropping " << *m << dendl; | |
5101 | m->put(); | |
5102 | return; | |
5103 | } | |
5104 | } | |
5105 | ||
5106 | dout(7) << "handle_file_lock a=" << get_lock_action_name(m->get_action()) | |
5107 | << " on " << *lock | |
5108 | << " from mds." << from << " " | |
5109 | << *in << dendl; | |
5110 | ||
5111 | bool caps = lock->get_cap_shift(); | |
5112 | ||
5113 | switch (m->get_action()) { | |
5114 | // -- replica -- | |
5115 | case LOCK_AC_SYNC: | |
5116 | assert(lock->get_state() == LOCK_LOCK || | |
5117 | lock->get_state() == LOCK_MIX || | |
5118 | lock->get_state() == LOCK_MIX_SYNC2); | |
5119 | ||
5120 | if (lock->get_state() == LOCK_MIX) { | |
5121 | lock->set_state(LOCK_MIX_SYNC); | |
5122 | eval_gather(lock, true); | |
31f18b77 FG |
5123 | if (lock->is_unstable_and_locked()) |
5124 | mds->mdlog->flush(); | |
7c673cae FG |
5125 | break; |
5126 | } | |
5127 | ||
5128 | (static_cast<ScatterLock *>(lock))->finish_flush(); | |
5129 | (static_cast<ScatterLock *>(lock))->clear_flushed(); | |
5130 | ||
5131 | // ok | |
5132 | lock->decode_locked_state(m->get_data()); | |
5133 | lock->set_state(LOCK_SYNC); | |
5134 | ||
5135 | lock->get_rdlock(); | |
5136 | if (caps) | |
5137 | issue_caps(in); | |
5138 | lock->finish_waiters(SimpleLock::WAIT_RD|SimpleLock::WAIT_STABLE); | |
5139 | lock->put_rdlock(); | |
5140 | break; | |
5141 | ||
5142 | case LOCK_AC_LOCK: | |
5143 | switch (lock->get_state()) { | |
5144 | case LOCK_SYNC: lock->set_state(LOCK_SYNC_LOCK); break; | |
5145 | case LOCK_MIX: lock->set_state(LOCK_MIX_LOCK); break; | |
5146 | default: ceph_abort(); | |
5147 | } | |
5148 | ||
5149 | eval_gather(lock, true); | |
31f18b77 FG |
5150 | if (lock->is_unstable_and_locked()) |
5151 | mds->mdlog->flush(); | |
5152 | ||
7c673cae FG |
5153 | break; |
5154 | ||
5155 | case LOCK_AC_LOCKFLUSHED: | |
5156 | (static_cast<ScatterLock *>(lock))->finish_flush(); | |
5157 | (static_cast<ScatterLock *>(lock))->clear_flushed(); | |
5158 | // wake up scatter_nudge waiters | |
5159 | if (lock->is_stable()) | |
5160 | lock->finish_waiters(SimpleLock::WAIT_STABLE); | |
5161 | break; | |
5162 | ||
5163 | case LOCK_AC_MIX: | |
5164 | assert(lock->get_state() == LOCK_SYNC || | |
5165 | lock->get_state() == LOCK_LOCK || | |
5166 | lock->get_state() == LOCK_SYNC_MIX2); | |
5167 | ||
5168 | if (lock->get_state() == LOCK_SYNC) { | |
5169 | // MIXED | |
5170 | lock->set_state(LOCK_SYNC_MIX); | |
5171 | eval_gather(lock, true); | |
31f18b77 FG |
5172 | if (lock->is_unstable_and_locked()) |
5173 | mds->mdlog->flush(); | |
7c673cae FG |
5174 | break; |
5175 | } | |
c07f9fc5 | 5176 | |
7c673cae | 5177 | // ok |
7c673cae | 5178 | lock->set_state(LOCK_MIX); |
c07f9fc5 | 5179 | lock->decode_locked_state(m->get_data()); |
7c673cae FG |
5180 | |
5181 | if (caps) | |
5182 | issue_caps(in); | |
5183 | ||
5184 | lock->finish_waiters(SimpleLock::WAIT_WR|SimpleLock::WAIT_STABLE); | |
5185 | break; | |
5186 | ||
5187 | ||
5188 | // -- auth -- | |
5189 | case LOCK_AC_LOCKACK: | |
5190 | assert(lock->get_state() == LOCK_SYNC_LOCK || | |
5191 | lock->get_state() == LOCK_MIX_LOCK || | |
5192 | lock->get_state() == LOCK_MIX_LOCK2 || | |
5193 | lock->get_state() == LOCK_MIX_EXCL || | |
5194 | lock->get_state() == LOCK_SYNC_EXCL || | |
5195 | lock->get_state() == LOCK_SYNC_MIX || | |
5196 | lock->get_state() == LOCK_MIX_TSYN); | |
5197 | assert(lock->is_gathering(from)); | |
5198 | lock->remove_gather(from); | |
5199 | ||
5200 | if (lock->get_state() == LOCK_MIX_LOCK || | |
5201 | lock->get_state() == LOCK_MIX_LOCK2 || | |
5202 | lock->get_state() == LOCK_MIX_EXCL || | |
5203 | lock->get_state() == LOCK_MIX_TSYN) { | |
5204 | lock->decode_locked_state(m->get_data()); | |
5205 | // replica is waiting for AC_LOCKFLUSHED, eval_gather() should not | |
5206 | // delay calling scatter_writebehind(). | |
5207 | lock->clear_flushed(); | |
5208 | } | |
5209 | ||
5210 | if (lock->is_gathering()) { | |
5211 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5212 | << ", still gathering " << lock->get_gather_set() << dendl; | |
5213 | } else { | |
5214 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5215 | << ", last one" << dendl; | |
5216 | eval_gather(lock); | |
5217 | } | |
5218 | break; | |
5219 | ||
5220 | case LOCK_AC_SYNCACK: | |
5221 | assert(lock->get_state() == LOCK_MIX_SYNC); | |
5222 | assert(lock->is_gathering(from)); | |
5223 | lock->remove_gather(from); | |
5224 | ||
5225 | lock->decode_locked_state(m->get_data()); | |
5226 | ||
5227 | if (lock->is_gathering()) { | |
5228 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5229 | << ", still gathering " << lock->get_gather_set() << dendl; | |
5230 | } else { | |
5231 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5232 | << ", last one" << dendl; | |
5233 | eval_gather(lock); | |
5234 | } | |
5235 | break; | |
5236 | ||
5237 | case LOCK_AC_MIXACK: | |
5238 | assert(lock->get_state() == LOCK_SYNC_MIX); | |
5239 | assert(lock->is_gathering(from)); | |
5240 | lock->remove_gather(from); | |
5241 | ||
5242 | if (lock->is_gathering()) { | |
5243 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5244 | << ", still gathering " << lock->get_gather_set() << dendl; | |
5245 | } else { | |
5246 | dout(7) << "handle_file_lock " << *in << " from " << from | |
5247 | << ", last one" << dendl; | |
5248 | eval_gather(lock); | |
5249 | } | |
5250 | break; | |
5251 | ||
5252 | ||
5253 | // requests.... | |
5254 | case LOCK_AC_REQSCATTER: | |
5255 | if (lock->is_stable()) { | |
5256 | /* NOTE: we can do this _even_ if !can_auth_pin (i.e. freezing) | |
5257 | * because the replica should be holding an auth_pin if they're | |
5258 | * doing this (and thus, we are freezing, not frozen, and indefinite | |
5259 | * starvation isn't an issue). | |
5260 | */ | |
5261 | dout(7) << "handle_file_lock got scatter request on " << *lock | |
5262 | << " on " << *lock->get_parent() << dendl; | |
5263 | if (lock->get_state() != LOCK_MIX) // i.e., the reqscatter didn't race with an actual mix/scatter | |
5264 | scatter_mix(lock); | |
5265 | } else { | |
5266 | dout(7) << "handle_file_lock got scatter request, !stable, marking scatter_wanted on " << *lock | |
5267 | << " on " << *lock->get_parent() << dendl; | |
5268 | lock->set_scatter_wanted(); | |
5269 | } | |
5270 | break; | |
5271 | ||
5272 | case LOCK_AC_REQUNSCATTER: | |
5273 | if (lock->is_stable()) { | |
5274 | /* NOTE: we can do this _even_ if !can_auth_pin (i.e. freezing) | |
5275 | * because the replica should be holding an auth_pin if they're | |
5276 | * doing this (and thus, we are freezing, not frozen, and indefinite | |
5277 | * starvation isn't an issue). | |
5278 | */ | |
5279 | dout(7) << "handle_file_lock got unscatter request on " << *lock | |
5280 | << " on " << *lock->get_parent() << dendl; | |
5281 | if (lock->get_state() == LOCK_MIX) // i.e., the reqscatter didn't race with an actual mix/scatter | |
5282 | simple_lock(lock); // FIXME tempsync? | |
5283 | } else { | |
5284 | dout(7) << "handle_file_lock ignoring unscatter request on " << *lock | |
5285 | << " on " << *lock->get_parent() << dendl; | |
5286 | lock->set_unscatter_wanted(); | |
5287 | } | |
5288 | break; | |
5289 | ||
5290 | case LOCK_AC_REQRDLOCK: | |
5291 | handle_reqrdlock(lock, m); | |
5292 | break; | |
5293 | ||
5294 | case LOCK_AC_NUDGE: | |
5295 | if (!lock->get_parent()->is_auth()) { | |
5296 | dout(7) << "handle_file_lock IGNORING nudge on non-auth " << *lock | |
5297 | << " on " << *lock->get_parent() << dendl; | |
5298 | } else if (!lock->get_parent()->is_replicated()) { | |
5299 | dout(7) << "handle_file_lock IGNORING nudge on non-replicated " << *lock | |
5300 | << " on " << *lock->get_parent() << dendl; | |
5301 | } else { | |
5302 | dout(7) << "handle_file_lock trying nudge on " << *lock | |
5303 | << " on " << *lock->get_parent() << dendl; | |
5304 | scatter_nudge(lock, 0, true); | |
5305 | mds->mdlog->flush(); | |
5306 | } | |
5307 | break; | |
5308 | ||
5309 | default: | |
5310 | ceph_abort(); | |
5311 | } | |
5312 | ||
5313 | m->put(); | |
5314 | } | |
5315 | ||
5316 | ||
5317 | ||
5318 | ||
5319 | ||
5320 |