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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 | #include <boost/lexical_cast.hpp> | |
16 | #include "include/assert.h" // lexical_cast includes system assert.h | |
17 | ||
18 | #include <boost/config/warning_disable.hpp> | |
19 | #include <boost/fusion/include/std_pair.hpp> | |
20 | ||
21 | #include "MDSRank.h" | |
22 | #include "Server.h" | |
23 | #include "Locker.h" | |
24 | #include "MDCache.h" | |
25 | #include "MDLog.h" | |
26 | #include "Migrator.h" | |
27 | #include "MDBalancer.h" | |
28 | #include "InoTable.h" | |
29 | #include "SnapClient.h" | |
30 | #include "Mutation.h" | |
31 | ||
32 | #include "msg/Messenger.h" | |
33 | ||
34 | #include "osdc/Objecter.h" | |
35 | ||
36 | #include "messages/MClientSession.h" | |
37 | #include "messages/MClientRequest.h" | |
38 | #include "messages/MClientReply.h" | |
39 | #include "messages/MClientReconnect.h" | |
40 | #include "messages/MClientCaps.h" | |
41 | #include "messages/MClientSnap.h" | |
42 | ||
43 | #include "messages/MMDSSlaveRequest.h" | |
44 | ||
45 | #include "messages/MLock.h" | |
46 | ||
47 | #include "events/EUpdate.h" | |
48 | #include "events/ESlaveUpdate.h" | |
49 | #include "events/ESession.h" | |
50 | #include "events/EOpen.h" | |
51 | #include "events/ECommitted.h" | |
52 | ||
53 | #include "include/filepath.h" | |
54 | #include "common/errno.h" | |
55 | #include "common/Timer.h" | |
56 | #include "common/perf_counters.h" | |
57 | #include "include/compat.h" | |
58 | #include "osd/OSDMap.h" | |
59 | ||
60 | #include <errno.h> | |
61 | ||
62 | #include <list> | |
63 | #include <iostream> | |
64 | using namespace std; | |
65 | ||
66 | #include "common/config.h" | |
67 | ||
68 | #define dout_context g_ceph_context | |
69 | #define dout_subsys ceph_subsys_mds | |
70 | #undef dout_prefix | |
71 | #define dout_prefix *_dout << "mds." << mds->get_nodeid() << ".server " | |
72 | ||
73 | ||
74 | class ServerContext : public MDSInternalContextBase { | |
75 | protected: | |
76 | Server *server; | |
77 | MDSRank *get_mds() override | |
78 | { | |
79 | return server->mds; | |
80 | } | |
81 | ||
82 | public: | |
83 | explicit ServerContext(Server *s) : server(s) { | |
84 | assert(server != NULL); | |
85 | } | |
86 | }; | |
87 | ||
88 | class ServerLogContext : public MDSLogContextBase { | |
89 | protected: | |
90 | Server *server; | |
91 | MDSRank *get_mds() override | |
92 | { | |
93 | return server->mds; | |
94 | } | |
95 | ||
96 | MDRequestRef mdr; | |
97 | void pre_finish(int r) override { | |
98 | if (mdr) | |
99 | mdr->mark_event("journal_committed: "); | |
100 | } | |
101 | public: | |
102 | explicit ServerLogContext(Server *s) : server(s) { | |
103 | assert(server != NULL); | |
104 | } | |
105 | explicit ServerLogContext(Server *s, MDRequestRef& r) : server(s), mdr(r) { | |
106 | assert(server != NULL); | |
107 | } | |
108 | }; | |
109 | ||
110 | void Server::create_logger() | |
111 | { | |
112 | PerfCountersBuilder plb(g_ceph_context, "mds_server", l_mdss_first, l_mdss_last); | |
113 | plb.add_u64_counter(l_mdss_handle_client_request,"handle_client_request", | |
114 | "Client requests", "hcr"); | |
115 | plb.add_u64_counter(l_mdss_handle_slave_request, "handle_slave_request", | |
116 | "Slave requests", "hsr"); | |
117 | plb.add_u64_counter(l_mdss_handle_client_session, "handle_client_session", | |
118 | "Client session messages", "hcs"); | |
119 | plb.add_u64_counter(l_mdss_dispatch_client_request, "dispatch_client_request", "Client requests dispatched"); | |
120 | plb.add_u64_counter(l_mdss_dispatch_slave_request, "dispatch_server_request", "Server requests dispatched"); | |
121 | plb.add_u64_counter(l_mdss_req_lookuphash, "req_lookuphash", | |
122 | "Request type lookup hash of inode"); | |
123 | plb.add_u64_counter(l_mdss_req_lookupino, "req_lookupino", | |
124 | "Request type lookup inode"); | |
125 | plb.add_u64_counter(l_mdss_req_lookupparent, "req_lookupparent", | |
126 | "Request type lookup parent"); | |
127 | plb.add_u64_counter(l_mdss_req_lookupname, "req_lookupname", | |
128 | "Request type lookup name"); | |
129 | plb.add_u64_counter(l_mdss_req_lookup, "req_lookup", | |
130 | "Request type lookup"); | |
131 | plb.add_u64_counter(l_mdss_req_lookupsnap, "req_lookupsnap", | |
132 | "Request type lookup snapshot"); | |
133 | plb.add_u64_counter(l_mdss_req_getattr, "req_getattr", | |
134 | "Request type get attribute"); | |
135 | plb.add_u64_counter(l_mdss_req_setattr, "req_setattr", | |
136 | "Request type set attribute"); | |
137 | plb.add_u64_counter(l_mdss_req_setlayout, "req_setlayout", | |
138 | "Request type set file layout"); | |
139 | plb.add_u64_counter(l_mdss_req_setdirlayout, "req_setdirlayout", | |
140 | "Request type set directory layout"); | |
141 | plb.add_u64_counter(l_mdss_req_setxattr, "req_setxattr", | |
142 | "Request type set extended attribute"); | |
143 | plb.add_u64_counter(l_mdss_req_rmxattr, "req_rmxattr", | |
144 | "Request type remove extended attribute"); | |
145 | plb.add_u64_counter(l_mdss_req_readdir, "req_readdir", | |
146 | "Request type read directory"); | |
147 | plb.add_u64_counter(l_mdss_req_setfilelock, "req_setfilelock", | |
148 | "Request type set file lock"); | |
149 | plb.add_u64_counter(l_mdss_req_getfilelock, "req_getfilelock", | |
150 | "Request type get file lock"); | |
151 | plb.add_u64_counter(l_mdss_req_create, "req_create", | |
152 | "Request type create"); | |
153 | plb.add_u64_counter(l_mdss_req_open, "req_open", | |
154 | "Request type open"); | |
155 | plb.add_u64_counter(l_mdss_req_mknod, "req_mknod", | |
156 | "Request type make node"); | |
157 | plb.add_u64_counter(l_mdss_req_link, "req_link", | |
158 | "Request type link"); | |
159 | plb.add_u64_counter(l_mdss_req_unlink, "req_unlink", | |
160 | "Request type unlink"); | |
161 | plb.add_u64_counter(l_mdss_req_rmdir, "req_rmdir", | |
162 | "Request type remove directory"); | |
163 | plb.add_u64_counter(l_mdss_req_rename, "req_rename", | |
164 | "Request type rename"); | |
165 | plb.add_u64_counter(l_mdss_req_mkdir, "req_mkdir", | |
166 | "Request type make directory"); | |
167 | plb.add_u64_counter(l_mdss_req_symlink, "req_symlink", | |
168 | "Request type symbolic link"); | |
169 | plb.add_u64_counter(l_mdss_req_lssnap, "req_lssnap", | |
170 | "Request type list snapshot"); | |
171 | plb.add_u64_counter(l_mdss_req_mksnap, "req_mksnap", | |
172 | "Request type make snapshot"); | |
173 | plb.add_u64_counter(l_mdss_req_rmsnap, "req_rmsnap", | |
174 | "Request type remove snapshot"); | |
175 | plb.add_u64_counter(l_mdss_req_renamesnap, "req_renamesnap", | |
176 | "Request type rename snapshot"); | |
177 | logger = plb.create_perf_counters(); | |
178 | g_ceph_context->get_perfcounters_collection()->add(logger); | |
179 | } | |
180 | ||
181 | Server::Server(MDSRank *m) : | |
182 | mds(m), | |
183 | mdcache(mds->mdcache), mdlog(mds->mdlog), | |
184 | logger(0), | |
185 | is_full(false), | |
186 | reconnect_done(NULL), | |
187 | failed_reconnects(0), | |
31f18b77 | 188 | reconnect_evicting(false), |
7c673cae FG |
189 | terminating_sessions(false) |
190 | { | |
191 | } | |
192 | ||
193 | ||
194 | /* This function DOES put the passed message before returning*/ | |
195 | void Server::dispatch(Message *m) | |
196 | { | |
197 | switch (m->get_type()) { | |
198 | case CEPH_MSG_CLIENT_RECONNECT: | |
199 | handle_client_reconnect(static_cast<MClientReconnect*>(m)); | |
200 | return; | |
201 | } | |
202 | ||
203 | // active? | |
204 | if (!mds->is_active() && | |
205 | !(mds->is_stopping() && m->get_source().is_mds())) { | |
206 | if (m->get_type() == CEPH_MSG_CLIENT_REQUEST && | |
207 | (mds->is_reconnect() || mds->get_want_state() == CEPH_MDS_STATE_RECONNECT)) { | |
208 | MClientRequest *req = static_cast<MClientRequest*>(m); | |
209 | Session *session = get_session(req); | |
210 | if (!session || session->is_closed()) { | |
211 | dout(5) << "session is closed, dropping " << req->get_reqid() << dendl; | |
212 | req->put(); | |
213 | return; | |
214 | } | |
215 | bool queue_replay = false; | |
216 | if (req->is_replay()) { | |
217 | dout(3) << "queuing replayed op" << dendl; | |
218 | queue_replay = true; | |
219 | } else if (req->get_retry_attempt()) { | |
220 | // process completed request in clientreplay stage. The completed request | |
221 | // might have created new file/directorie. This guarantees MDS sends a reply | |
222 | // to client before other request modifies the new file/directorie. | |
223 | if (session->have_completed_request(req->get_reqid().tid, NULL)) { | |
224 | dout(3) << "queuing completed op" << dendl; | |
225 | queue_replay = true; | |
226 | } | |
227 | // this request was created before the cap reconnect message, drop any embedded | |
228 | // cap releases. | |
229 | req->releases.clear(); | |
230 | } | |
231 | if (queue_replay) { | |
232 | req->mark_queued_for_replay(); | |
233 | mds->enqueue_replay(new C_MDS_RetryMessage(mds, m)); | |
234 | return; | |
235 | } | |
236 | } | |
237 | ||
238 | bool wait_for_active = true; | |
239 | if (m->get_type() == MSG_MDS_SLAVE_REQUEST) { | |
240 | // handle_slave_request() will wait if necessary | |
241 | wait_for_active = false; | |
242 | } else if (mds->is_clientreplay()) { | |
243 | // session open requests need to be handled during replay, | |
244 | // close requests need to be delayed | |
245 | if ((m->get_type() == CEPH_MSG_CLIENT_SESSION && | |
246 | (static_cast<MClientSession*>(m))->get_op() != CEPH_SESSION_REQUEST_CLOSE)) { | |
247 | wait_for_active = false; | |
248 | } else if (m->get_type() == CEPH_MSG_CLIENT_REQUEST) { | |
249 | MClientRequest *req = static_cast<MClientRequest*>(m); | |
250 | if (req->is_queued_for_replay()) { | |
251 | wait_for_active = false; | |
252 | } | |
253 | } | |
254 | } | |
255 | if (wait_for_active) { | |
256 | dout(3) << "not active yet, waiting" << dendl; | |
257 | mds->wait_for_active(new C_MDS_RetryMessage(mds, m)); | |
258 | return; | |
259 | } | |
260 | } | |
261 | ||
262 | switch (m->get_type()) { | |
263 | case CEPH_MSG_CLIENT_SESSION: | |
264 | handle_client_session(static_cast<MClientSession*>(m)); | |
265 | return; | |
266 | case CEPH_MSG_CLIENT_REQUEST: | |
267 | handle_client_request(static_cast<MClientRequest*>(m)); | |
268 | return; | |
269 | case MSG_MDS_SLAVE_REQUEST: | |
270 | handle_slave_request(static_cast<MMDSSlaveRequest*>(m)); | |
271 | return; | |
272 | default: | |
273 | derr << "server unknown message " << m->get_type() << dendl; | |
274 | assert(0 == "server unknown message"); | |
275 | } | |
276 | } | |
277 | ||
278 | ||
279 | ||
280 | // ---------------------------------------------------------- | |
281 | // SESSION management | |
282 | ||
283 | class C_MDS_session_finish : public ServerLogContext { | |
284 | Session *session; | |
285 | uint64_t state_seq; | |
286 | bool open; | |
287 | version_t cmapv; | |
288 | interval_set<inodeno_t> inos; | |
289 | version_t inotablev; | |
290 | Context *fin; | |
291 | public: | |
292 | C_MDS_session_finish(Server *srv, Session *se, uint64_t sseq, bool s, version_t mv, Context *fin_ = NULL) : | |
293 | ServerLogContext(srv), session(se), state_seq(sseq), open(s), cmapv(mv), inotablev(0), fin(fin_) { } | |
294 | C_MDS_session_finish(Server *srv, Session *se, uint64_t sseq, bool s, version_t mv, interval_set<inodeno_t>& i, version_t iv, Context *fin_ = NULL) : | |
295 | ServerLogContext(srv), session(se), state_seq(sseq), open(s), cmapv(mv), inos(i), inotablev(iv), fin(fin_) { } | |
296 | void finish(int r) override { | |
297 | assert(r == 0); | |
298 | server->_session_logged(session, state_seq, open, cmapv, inos, inotablev); | |
299 | if (fin) { | |
300 | fin->complete(r); | |
301 | } | |
302 | } | |
303 | }; | |
304 | ||
305 | Session *Server::get_session(Message *m) | |
306 | { | |
307 | Session *session = static_cast<Session *>(m->get_connection()->get_priv()); | |
308 | if (session) { | |
309 | dout(20) << "get_session have " << session << " " << session->info.inst | |
310 | << " state " << session->get_state_name() << dendl; | |
311 | session->put(); // not carry ref | |
312 | } else { | |
313 | dout(20) << "get_session dne for " << m->get_source_inst() << dendl; | |
314 | } | |
315 | return session; | |
316 | } | |
317 | ||
318 | /* This function DOES put the passed message before returning*/ | |
319 | void Server::handle_client_session(MClientSession *m) | |
320 | { | |
321 | version_t pv; | |
31f18b77 | 322 | bool blacklisted = false; |
7c673cae FG |
323 | Session *session = get_session(m); |
324 | ||
325 | dout(3) << "handle_client_session " << *m << " from " << m->get_source() << dendl; | |
326 | assert(m->get_source().is_client()); // should _not_ come from an mds! | |
327 | ||
328 | if (!session) { | |
329 | dout(0) << " ignoring sessionless msg " << *m << dendl; | |
330 | m->put(); | |
331 | return; | |
332 | } | |
333 | ||
334 | if (logger) | |
335 | logger->inc(l_mdss_handle_client_session); | |
336 | ||
337 | uint64_t sseq = 0; | |
338 | switch (m->get_op()) { | |
339 | case CEPH_SESSION_REQUEST_OPEN: | |
340 | if (session->is_opening() || | |
341 | session->is_open() || | |
342 | session->is_stale() || | |
343 | session->is_killing()) { | |
344 | dout(10) << "currently open|opening|stale|killing, dropping this req" << dendl; | |
345 | m->put(); | |
346 | return; | |
347 | } | |
348 | assert(session->is_closed() || | |
349 | session->is_closing()); | |
350 | ||
31f18b77 FG |
351 | blacklisted = mds->objecter->with_osdmap( |
352 | [session](const OSDMap &osd_map) -> bool { | |
353 | return osd_map.is_blacklisted(session->info.inst.addr); | |
354 | }); | |
355 | ||
356 | if (blacklisted) { | |
357 | dout(10) << "ignoring blacklisted client " << session->info.inst.addr << dendl; | |
358 | m->put(); | |
359 | return; | |
360 | } | |
361 | ||
7c673cae FG |
362 | session->set_client_metadata(m->client_meta); |
363 | dout(20) << __func__ << " CEPH_SESSION_REQUEST_OPEN " | |
364 | << session->info.client_metadata.size() << " metadata entries:" << dendl; | |
365 | for (map<string, string>::iterator i = session->info.client_metadata.begin(); | |
366 | i != session->info.client_metadata.end(); ++i) { | |
367 | dout(20) << " " << i->first << ": " << i->second << dendl; | |
368 | } | |
369 | ||
370 | // Special case for the 'root' metadata path; validate that the claimed | |
371 | // root is actually within the caps of the session | |
372 | if (session->info.client_metadata.count("root")) { | |
373 | const auto claimed_root = session->info.client_metadata.at("root"); | |
374 | // claimed_root has a leading "/" which we strip before passing | |
375 | // into caps check | |
376 | if (claimed_root.empty() || claimed_root[0] != '/' || | |
377 | !session->auth_caps.path_capable(claimed_root.substr(1))) { | |
378 | derr << __func__ << " forbidden path claimed as mount root: " | |
379 | << claimed_root << " by " << m->get_source() << dendl; | |
380 | // Tell the client we're rejecting their open | |
381 | mds->send_message_client(new MClientSession(CEPH_SESSION_REJECT), session); | |
382 | mds->clog->warn() << "client session with invalid root '" << | |
383 | claimed_root << "' denied (" << session->info.inst << ")"; | |
384 | session->clear(); | |
385 | // Drop out; don't record this session in SessionMap or journal it. | |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
390 | if (session->is_closed()) | |
391 | mds->sessionmap.add_session(session); | |
392 | ||
393 | pv = mds->sessionmap.mark_projected(session); | |
394 | sseq = mds->sessionmap.set_state(session, Session::STATE_OPENING); | |
395 | mds->sessionmap.touch_session(session); | |
396 | mdlog->start_submit_entry(new ESession(m->get_source_inst(), true, pv, m->client_meta), | |
397 | new C_MDS_session_finish(this, session, sseq, true, pv)); | |
398 | mdlog->flush(); | |
399 | break; | |
400 | ||
401 | case CEPH_SESSION_REQUEST_RENEWCAPS: | |
402 | if (session->is_open() || | |
403 | session->is_stale()) { | |
404 | mds->sessionmap.touch_session(session); | |
405 | if (session->is_stale()) { | |
406 | mds->sessionmap.set_state(session, Session::STATE_OPEN); | |
407 | mds->locker->resume_stale_caps(session); | |
408 | mds->sessionmap.touch_session(session); | |
409 | } | |
410 | m->get_connection()->send_message(new MClientSession(CEPH_SESSION_RENEWCAPS, m->get_seq())); | |
411 | } else { | |
412 | dout(10) << "ignoring renewcaps on non open|stale session (" << session->get_state_name() << ")" << dendl; | |
413 | } | |
414 | break; | |
415 | ||
416 | case CEPH_SESSION_REQUEST_CLOSE: | |
417 | { | |
418 | if (session->is_closed() || | |
419 | session->is_closing() || | |
420 | session->is_killing()) { | |
421 | dout(10) << "already closed|closing|killing, dropping this req" << dendl; | |
422 | m->put(); | |
423 | return; | |
424 | } | |
425 | if (session->is_importing()) { | |
426 | dout(10) << "ignoring close req on importing session" << dendl; | |
427 | m->put(); | |
428 | return; | |
429 | } | |
430 | assert(session->is_open() || | |
431 | session->is_stale() || | |
432 | session->is_opening()); | |
433 | if (m->get_seq() < session->get_push_seq()) { | |
434 | dout(10) << "old push seq " << m->get_seq() << " < " << session->get_push_seq() | |
435 | << ", dropping" << dendl; | |
436 | m->put(); | |
437 | return; | |
438 | } | |
439 | // We are getting a seq that is higher than expected. | |
440 | // Handle the same as any other seqn error. | |
441 | // | |
442 | if (m->get_seq() != session->get_push_seq()) { | |
443 | dout(0) << "old push seq " << m->get_seq() << " != " << session->get_push_seq() | |
444 | << ", BUGGY!" << dendl; | |
445 | mds->clog->warn() << "incorrect push seq " << m->get_seq() << " != " | |
446 | << session->get_push_seq() << ", dropping" << " from client : " << session->get_human_name(); | |
447 | m->put(); | |
448 | return; | |
449 | } | |
450 | journal_close_session(session, Session::STATE_CLOSING, NULL); | |
451 | } | |
452 | break; | |
453 | ||
454 | case CEPH_SESSION_FLUSHMSG_ACK: | |
455 | finish_flush_session(session, m->get_seq()); | |
456 | break; | |
457 | ||
31f18b77 FG |
458 | case CEPH_SESSION_REQUEST_FLUSH_MDLOG: |
459 | mdlog->flush(); | |
460 | break; | |
461 | ||
7c673cae FG |
462 | default: |
463 | ceph_abort(); | |
464 | } | |
465 | m->put(); | |
466 | } | |
467 | ||
468 | void Server::flush_client_sessions(set<client_t>& client_set, MDSGatherBuilder& gather) | |
469 | { | |
470 | for (set<client_t>::iterator p = client_set.begin(); p != client_set.end(); ++p) { | |
471 | Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p->v)); | |
472 | assert(session); | |
473 | if (!session->is_open() || | |
474 | !session->connection.get() || | |
475 | !session->connection->has_feature(CEPH_FEATURE_EXPORT_PEER)) | |
476 | continue; | |
477 | version_t seq = session->wait_for_flush(gather.new_sub()); | |
478 | mds->send_message_client(new MClientSession(CEPH_SESSION_FLUSHMSG, seq), session); | |
479 | } | |
480 | } | |
481 | ||
482 | void Server::finish_flush_session(Session *session, version_t seq) | |
483 | { | |
484 | list<MDSInternalContextBase*> finished; | |
485 | session->finish_flush(seq, finished); | |
486 | mds->queue_waiters(finished); | |
487 | } | |
488 | ||
489 | void Server::_session_logged(Session *session, uint64_t state_seq, bool open, version_t pv, | |
490 | interval_set<inodeno_t>& inos, version_t piv) | |
491 | { | |
492 | dout(10) << "_session_logged " << session->info.inst << " state_seq " << state_seq << " " << (open ? "open":"close") | |
493 | << " " << pv << dendl; | |
494 | ||
495 | if (piv) { | |
496 | assert(session->is_closing() || session->is_killing() || | |
497 | session->is_opening()); // re-open closing session | |
498 | session->info.prealloc_inos.subtract(inos); | |
499 | mds->inotable->apply_release_ids(inos); | |
500 | assert(mds->inotable->get_version() == piv); | |
501 | } | |
502 | ||
503 | mds->sessionmap.mark_dirty(session); | |
504 | ||
505 | // apply | |
506 | if (session->get_state_seq() != state_seq) { | |
507 | dout(10) << " journaled state_seq " << state_seq << " != current " << session->get_state_seq() | |
508 | << ", noop" << dendl; | |
509 | // close must have been canceled (by an import?), or any number of other things.. | |
510 | } else if (open) { | |
511 | assert(session->is_opening()); | |
512 | mds->sessionmap.set_state(session, Session::STATE_OPEN); | |
513 | mds->sessionmap.touch_session(session); | |
514 | assert(session->connection != NULL); | |
515 | session->connection->send_message(new MClientSession(CEPH_SESSION_OPEN)); | |
516 | if (mdcache->is_readonly()) | |
517 | session->connection->send_message(new MClientSession(CEPH_SESSION_FORCE_RO)); | |
518 | } else if (session->is_closing() || | |
519 | session->is_killing()) { | |
520 | // kill any lingering capabilities, leases, requests | |
521 | while (!session->caps.empty()) { | |
522 | Capability *cap = session->caps.front(); | |
523 | CInode *in = cap->get_inode(); | |
524 | dout(20) << " killing capability " << ccap_string(cap->issued()) << " on " << *in << dendl; | |
525 | mds->locker->remove_client_cap(in, session->info.inst.name.num()); | |
526 | } | |
527 | while (!session->leases.empty()) { | |
528 | ClientLease *r = session->leases.front(); | |
529 | CDentry *dn = static_cast<CDentry*>(r->parent); | |
530 | dout(20) << " killing client lease of " << *dn << dendl; | |
531 | dn->remove_client_lease(r, mds->locker); | |
532 | } | |
533 | if (client_reconnect_gather.count(session->info.get_client())) { | |
534 | dout(20) << " removing client from reconnect set" << dendl; | |
535 | client_reconnect_gather.erase(session->info.get_client()); | |
536 | ||
537 | if (client_reconnect_gather.empty()) { | |
538 | dout(7) << " client " << session->info.inst << " was last reconnect, finishing" << dendl; | |
539 | reconnect_gather_finish(); | |
540 | } | |
541 | } | |
542 | ||
543 | if (session->is_closing()) { | |
544 | // mark con disposable. if there is a fault, we will get a | |
545 | // reset and clean it up. if the client hasn't received the | |
546 | // CLOSE message yet, they will reconnect and get an | |
547 | // ms_handle_remote_reset() and realize they had in fact closed. | |
548 | // do this *before* sending the message to avoid a possible | |
549 | // race. | |
550 | if (session->connection != NULL) { | |
551 | // Conditional because terminate_sessions will indiscrimately | |
552 | // put sessions in CLOSING whether they ever had a conn or not. | |
553 | session->connection->mark_disposable(); | |
554 | } | |
555 | ||
556 | // reset session | |
557 | mds->send_message_client(new MClientSession(CEPH_SESSION_CLOSE), session); | |
558 | mds->sessionmap.set_state(session, Session::STATE_CLOSED); | |
559 | session->clear(); | |
560 | mds->sessionmap.remove_session(session); | |
561 | } else if (session->is_killing()) { | |
562 | // destroy session, close connection | |
563 | if (session->connection != NULL) { | |
564 | session->connection->mark_down(); | |
565 | } | |
566 | mds->sessionmap.remove_session(session); | |
567 | } else { | |
568 | ceph_abort(); | |
569 | } | |
570 | } else { | |
571 | ceph_abort(); | |
572 | } | |
573 | } | |
574 | ||
575 | /** | |
576 | * Inject sessions from some source other than actual connections. | |
577 | * | |
578 | * For example: | |
579 | * - sessions inferred from journal replay | |
580 | * - sessions learned from other MDSs during rejoin | |
581 | * - sessions learned from other MDSs during dir/caps migration | |
582 | * - sessions learned from other MDSs during a cross-MDS rename | |
583 | */ | |
584 | version_t Server::prepare_force_open_sessions(map<client_t,entity_inst_t>& cm, | |
585 | map<client_t,uint64_t>& sseqmap) | |
586 | { | |
587 | version_t pv = mds->sessionmap.get_projected(); | |
588 | ||
589 | dout(10) << "prepare_force_open_sessions " << pv | |
590 | << " on " << cm.size() << " clients" | |
591 | << dendl; | |
592 | for (map<client_t,entity_inst_t>::iterator p = cm.begin(); p != cm.end(); ++p) { | |
593 | ||
594 | Session *session = mds->sessionmap.get_or_add_session(p->second); | |
595 | pv = mds->sessionmap.mark_projected(session); | |
596 | if (session->is_closed() || | |
597 | session->is_closing() || | |
598 | session->is_killing()) | |
599 | sseqmap[p->first] = mds->sessionmap.set_state(session, Session::STATE_OPENING); | |
600 | else | |
601 | assert(session->is_open() || | |
602 | session->is_opening() || | |
603 | session->is_stale()); | |
604 | session->inc_importing(); | |
605 | } | |
606 | return pv; | |
607 | } | |
608 | ||
609 | void Server::finish_force_open_sessions(map<client_t,entity_inst_t>& cm, | |
610 | map<client_t,uint64_t>& sseqmap, | |
611 | bool dec_import) | |
612 | { | |
613 | /* | |
614 | * FIXME: need to carefully consider the race conditions between a | |
615 | * client trying to close a session and an MDS doing an import | |
616 | * trying to force open a session... | |
617 | */ | |
618 | dout(10) << "finish_force_open_sessions on " << cm.size() << " clients," | |
619 | << " initial v " << mds->sessionmap.get_version() << dendl; | |
620 | ||
621 | ||
622 | int sessions_inserted = 0; | |
623 | for (map<client_t,entity_inst_t>::iterator p = cm.begin(); p != cm.end(); ++p) { | |
624 | sessions_inserted++; | |
625 | ||
626 | Session *session = mds->sessionmap.get_session(p->second.name); | |
627 | assert(session); | |
628 | ||
629 | if (sseqmap.count(p->first)) { | |
630 | uint64_t sseq = sseqmap[p->first]; | |
631 | if (session->get_state_seq() != sseq) { | |
632 | dout(10) << "force_open_sessions skipping changed " << session->info.inst << dendl; | |
633 | } else { | |
634 | dout(10) << "force_open_sessions opened " << session->info.inst << dendl; | |
635 | mds->sessionmap.set_state(session, Session::STATE_OPEN); | |
636 | mds->sessionmap.touch_session(session); | |
637 | mds->send_message_client(new MClientSession(CEPH_SESSION_OPEN), session); | |
638 | if (mdcache->is_readonly()) | |
639 | mds->send_message_client(new MClientSession(CEPH_SESSION_FORCE_RO), session); | |
640 | } | |
641 | } else { | |
642 | dout(10) << "force_open_sessions skipping already-open " << session->info.inst << dendl; | |
643 | assert(session->is_open() || session->is_stale()); | |
644 | } | |
645 | ||
646 | if (dec_import) { | |
647 | session->dec_importing(); | |
648 | } | |
649 | ||
650 | mds->sessionmap.mark_dirty(session); | |
651 | } | |
652 | ||
653 | dout(10) << __func__ << ": final v " << mds->sessionmap.get_version() << dendl; | |
654 | } | |
655 | ||
656 | class C_MDS_TerminatedSessions : public ServerContext { | |
657 | void finish(int r) override { | |
658 | server->terminating_sessions = false; | |
659 | } | |
660 | public: | |
661 | explicit C_MDS_TerminatedSessions(Server *s) : ServerContext(s) {} | |
662 | }; | |
663 | ||
664 | void Server::terminate_sessions() | |
665 | { | |
666 | dout(2) << "terminate_sessions" << dendl; | |
667 | ||
668 | terminating_sessions = true; | |
669 | ||
670 | // kill them off. clients will retry etc. | |
671 | set<Session*> sessions; | |
672 | mds->sessionmap.get_client_session_set(sessions); | |
673 | for (set<Session*>::const_iterator p = sessions.begin(); | |
674 | p != sessions.end(); | |
675 | ++p) { | |
676 | Session *session = *p; | |
677 | if (session->is_closing() || | |
678 | session->is_killing() || | |
679 | session->is_closed()) | |
680 | continue; | |
681 | journal_close_session(session, Session::STATE_CLOSING, NULL); | |
682 | } | |
683 | ||
684 | mdlog->wait_for_safe(new C_MDS_TerminatedSessions(this)); | |
685 | } | |
686 | ||
687 | ||
688 | void Server::find_idle_sessions() | |
689 | { | |
690 | dout(10) << "find_idle_sessions. laggy until " << mds->get_laggy_until() << dendl; | |
691 | ||
692 | // timeout/stale | |
693 | // (caps go stale, lease die) | |
694 | utime_t now = ceph_clock_now(); | |
695 | utime_t cutoff = now; | |
696 | cutoff -= g_conf->mds_session_timeout; | |
697 | while (1) { | |
698 | Session *session = mds->sessionmap.get_oldest_session(Session::STATE_OPEN); | |
699 | if (!session) break; | |
700 | dout(20) << "laggiest active session is " << session->info.inst << dendl; | |
701 | if (session->last_cap_renew >= cutoff) { | |
702 | dout(20) << "laggiest active session is " << session->info.inst << " and sufficiently new (" | |
703 | << session->last_cap_renew << ")" << dendl; | |
704 | break; | |
705 | } | |
706 | ||
707 | dout(10) << "new stale session " << session->info.inst << " last " << session->last_cap_renew << dendl; | |
708 | mds->sessionmap.set_state(session, Session::STATE_STALE); | |
709 | mds->locker->revoke_stale_caps(session); | |
710 | mds->locker->remove_stale_leases(session); | |
711 | mds->send_message_client(new MClientSession(CEPH_SESSION_STALE, session->get_push_seq()), session); | |
712 | finish_flush_session(session, session->get_push_seq()); | |
713 | } | |
714 | ||
715 | // autoclose | |
716 | cutoff = now; | |
717 | cutoff -= g_conf->mds_session_autoclose; | |
718 | ||
719 | // don't kick clients if we've been laggy | |
720 | if (mds->get_laggy_until() > cutoff) { | |
721 | dout(10) << " laggy_until " << mds->get_laggy_until() << " > cutoff " << cutoff | |
722 | << ", not kicking any clients to be safe" << dendl; | |
723 | return; | |
724 | } | |
725 | ||
726 | if (mds->sessionmap.get_sessions().size() == 1 && | |
727 | mds->mdsmap->get_num_in_mds() == 1) { | |
728 | dout(20) << "not evicting a slow client, because there is only one" | |
729 | << dendl; | |
730 | return; | |
731 | } | |
732 | ||
31f18b77 FG |
733 | // Collect a list of sessions exceeding the autoclose threshold |
734 | std::vector<Session *> to_evict; | |
735 | const auto sessions_p = mds->sessionmap.by_state.find(Session::STATE_STALE); | |
736 | if (sessions_p == mds->sessionmap.by_state.end() || sessions_p->second->empty()) { | |
737 | return; | |
738 | } | |
739 | const auto &stale_sessions = sessions_p->second; | |
740 | assert(stale_sessions != nullptr); | |
741 | ||
742 | for (const auto &session: *stale_sessions) { | |
7c673cae FG |
743 | if (session->is_importing()) { |
744 | dout(10) << "stopping at importing session " << session->info.inst << dendl; | |
745 | break; | |
746 | } | |
747 | assert(session->is_stale()); | |
748 | if (session->last_cap_renew >= cutoff) { | |
749 | dout(20) << "oldest stale session is " << session->info.inst << " and sufficiently new (" | |
750 | << session->last_cap_renew << ")" << dendl; | |
751 | break; | |
752 | } | |
31f18b77 FG |
753 | |
754 | to_evict.push_back(session); | |
755 | } | |
756 | ||
757 | for (const auto &session: to_evict) { | |
7c673cae FG |
758 | utime_t age = now; |
759 | age -= session->last_cap_renew; | |
31f18b77 FG |
760 | mds->clog->warn() << "evicting unresponsive client " << *session |
761 | << ", after " << age << " seconds"; | |
762 | dout(10) << "autoclosing stale session " << session->info.inst << " last " | |
763 | << session->last_cap_renew << dendl; | |
764 | ||
765 | if (g_conf->mds_session_blacklist_on_timeout) { | |
766 | std::stringstream ss; | |
767 | mds->evict_client(session->info.inst.name.num(), false, true, | |
768 | ss, nullptr); | |
769 | } else { | |
770 | kill_session(session, NULL); | |
771 | } | |
7c673cae FG |
772 | } |
773 | } | |
774 | ||
775 | /* | |
776 | * XXX bump in the interface here, not using an MDSInternalContextBase here | |
777 | * because all the callers right now happen to use a SaferCond | |
778 | */ | |
779 | void Server::kill_session(Session *session, Context *on_safe) | |
780 | { | |
31f18b77 FG |
781 | assert(mds->mds_lock.is_locked_by_me()); |
782 | ||
7c673cae FG |
783 | if ((session->is_opening() || |
784 | session->is_open() || | |
785 | session->is_stale()) && | |
786 | !session->is_importing()) { | |
787 | dout(10) << "kill_session " << session << dendl; | |
788 | journal_close_session(session, Session::STATE_KILLING, on_safe); | |
789 | } else { | |
790 | dout(10) << "kill_session importing or already closing/killing " << session << dendl; | |
791 | assert(session->is_closing() || | |
792 | session->is_closed() || | |
793 | session->is_killing() || | |
794 | session->is_importing()); | |
795 | if (on_safe) { | |
796 | on_safe->complete(0); | |
797 | } | |
798 | } | |
799 | } | |
800 | ||
31f18b77 FG |
801 | size_t Server::apply_blacklist(const std::set<entity_addr_t> &blacklist) |
802 | { | |
803 | std::list<Session*> victims; | |
804 | const auto sessions = mds->sessionmap.get_sessions(); | |
805 | for (const auto p : sessions) { | |
806 | if (!p.first.is_client()) { | |
807 | // Do not apply OSDMap blacklist to MDS daemons, we find out | |
808 | // about their death via MDSMap. | |
809 | continue; | |
810 | } | |
811 | ||
812 | Session *s = p.second; | |
813 | if (blacklist.count(s->info.inst.addr)) { | |
814 | victims.push_back(s); | |
815 | } | |
816 | } | |
817 | ||
818 | for (const auto s : victims) { | |
819 | kill_session(s, nullptr); | |
820 | } | |
821 | ||
822 | dout(10) << "apply_blacklist: killed " << victims.size() << dendl; | |
823 | ||
824 | return victims.size(); | |
825 | } | |
826 | ||
7c673cae FG |
827 | void Server::journal_close_session(Session *session, int state, Context *on_safe) |
828 | { | |
829 | uint64_t sseq = mds->sessionmap.set_state(session, state); | |
830 | version_t pv = mds->sessionmap.mark_projected(session); | |
831 | version_t piv = 0; | |
832 | ||
833 | // release alloc and pending-alloc inos for this session | |
834 | // and wipe out session state, in case the session close aborts for some reason | |
835 | interval_set<inodeno_t> both; | |
836 | both.insert(session->info.prealloc_inos); | |
837 | both.insert(session->pending_prealloc_inos); | |
838 | if (both.size()) { | |
839 | mds->inotable->project_release_ids(both); | |
840 | piv = mds->inotable->get_projected_version(); | |
841 | } else | |
842 | piv = 0; | |
843 | ||
844 | mdlog->start_submit_entry(new ESession(session->info.inst, false, pv, both, piv), | |
845 | new C_MDS_session_finish(this, session, sseq, false, pv, both, piv, on_safe)); | |
846 | mdlog->flush(); | |
847 | ||
848 | // clean up requests, too | |
849 | elist<MDRequestImpl*>::iterator p = | |
850 | session->requests.begin(member_offset(MDRequestImpl, | |
851 | item_session_request)); | |
852 | while (!p.end()) { | |
853 | MDRequestRef mdr = mdcache->request_get((*p)->reqid); | |
854 | ++p; | |
855 | mdcache->request_kill(mdr); | |
856 | } | |
857 | ||
858 | finish_flush_session(session, session->get_push_seq()); | |
859 | } | |
860 | ||
861 | void Server::reconnect_clients(MDSInternalContext *reconnect_done_) | |
862 | { | |
863 | reconnect_done = reconnect_done_; | |
864 | mds->sessionmap.get_client_set(client_reconnect_gather); | |
865 | ||
866 | if (client_reconnect_gather.empty()) { | |
867 | dout(7) << "reconnect_clients -- no sessions, doing nothing." << dendl; | |
868 | reconnect_gather_finish(); | |
869 | return; | |
870 | } | |
871 | ||
872 | // clients will get the mdsmap and discover we're reconnecting via the monitor. | |
873 | ||
874 | reconnect_start = ceph_clock_now(); | |
875 | dout(1) << "reconnect_clients -- " << client_reconnect_gather.size() << " sessions" << dendl; | |
876 | mds->sessionmap.dump(); | |
877 | } | |
878 | ||
879 | /* This function DOES put the passed message before returning*/ | |
880 | void Server::handle_client_reconnect(MClientReconnect *m) | |
881 | { | |
882 | dout(7) << "handle_client_reconnect " << m->get_source() << dendl; | |
883 | client_t from = m->get_source().num(); | |
884 | Session *session = get_session(m); | |
885 | assert(session); | |
886 | ||
887 | if (!mds->is_reconnect() && mds->get_want_state() == CEPH_MDS_STATE_RECONNECT) { | |
888 | dout(10) << " we're almost in reconnect state (mdsmap delivery race?); waiting" << dendl; | |
889 | mds->wait_for_reconnect(new C_MDS_RetryMessage(mds, m)); | |
890 | return; | |
891 | } | |
892 | ||
893 | utime_t delay = ceph_clock_now(); | |
894 | delay -= reconnect_start; | |
895 | dout(10) << " reconnect_start " << reconnect_start << " delay " << delay << dendl; | |
896 | ||
897 | bool deny = false; | |
898 | if (!mds->is_reconnect()) { | |
899 | // XXX maybe in the future we can do better than this? | |
900 | dout(1) << " no longer in reconnect state, ignoring reconnect, sending close" << dendl; | |
901 | mds->clog->info() << "denied reconnect attempt (mds is " | |
902 | << ceph_mds_state_name(mds->get_state()) | |
903 | << ") from " << m->get_source_inst() | |
904 | << " after " << delay << " (allowed interval " << g_conf->mds_reconnect_timeout << ")"; | |
905 | deny = true; | |
906 | } else if (session->is_closed()) { | |
907 | dout(1) << " session is closed, ignoring reconnect, sending close" << dendl; | |
908 | mds->clog->info() << "denied reconnect attempt (mds is " | |
909 | << ceph_mds_state_name(mds->get_state()) | |
910 | << ") from " << m->get_source_inst() << " (session is closed)"; | |
911 | deny = true; | |
912 | } else if (mdcache->is_readonly()) { | |
913 | dout(1) << " read-only FS, ignoring reconnect, sending close" << dendl; | |
914 | mds->clog->info() << "denied reconnect attempt (mds is read-only)"; | |
915 | deny = true; | |
916 | } | |
917 | ||
918 | if (deny) { | |
919 | m->get_connection()->send_message(new MClientSession(CEPH_SESSION_CLOSE)); | |
920 | m->put(); | |
921 | return; | |
922 | } | |
923 | ||
924 | // notify client of success with an OPEN | |
925 | m->get_connection()->send_message(new MClientSession(CEPH_SESSION_OPEN)); | |
926 | session->last_cap_renew = ceph_clock_now(); | |
927 | mds->clog->debug() << "reconnect by " << session->info.inst << " after " << delay; | |
928 | ||
929 | // snaprealms | |
930 | for (vector<ceph_mds_snaprealm_reconnect>::iterator p = m->realms.begin(); | |
931 | p != m->realms.end(); | |
932 | ++p) { | |
933 | CInode *in = mdcache->get_inode(inodeno_t(p->ino)); | |
934 | if (in && in->state_test(CInode::STATE_PURGING)) | |
935 | continue; | |
936 | if (in) { | |
937 | assert(in->snaprealm); | |
938 | if (in->snaprealm->have_past_parents_open()) { | |
939 | dout(15) << "open snaprealm (w/ past parents) on " << *in << dendl; | |
940 | mdcache->finish_snaprealm_reconnect(from, in->snaprealm, snapid_t(p->seq)); | |
941 | } else { | |
942 | dout(15) << "open snaprealm (w/o past parents) on " << *in << dendl; | |
943 | mdcache->add_reconnected_snaprealm(from, inodeno_t(p->ino), snapid_t(p->seq)); | |
944 | } | |
945 | } else { | |
946 | dout(15) << "open snaprealm (w/o inode) on " << inodeno_t(p->ino) | |
947 | << " seq " << p->seq << dendl; | |
948 | mdcache->add_reconnected_snaprealm(from, inodeno_t(p->ino), snapid_t(p->seq)); | |
949 | } | |
950 | } | |
951 | ||
952 | // caps | |
953 | for (map<inodeno_t, cap_reconnect_t>::iterator p = m->caps.begin(); | |
954 | p != m->caps.end(); | |
955 | ++p) { | |
956 | // make sure our last_cap_id is MAX over all issued caps | |
957 | if (p->second.capinfo.cap_id > mdcache->last_cap_id) | |
958 | mdcache->last_cap_id = p->second.capinfo.cap_id; | |
959 | ||
960 | CInode *in = mdcache->get_inode(p->first); | |
961 | if (in && in->state_test(CInode::STATE_PURGING)) | |
962 | continue; | |
963 | if (in && in->is_auth()) { | |
964 | // we recovered it, and it's ours. take note. | |
965 | dout(15) << "open cap realm " << inodeno_t(p->second.capinfo.snaprealm) | |
966 | << " on " << *in << dendl; | |
967 | in->reconnect_cap(from, p->second, session); | |
968 | mdcache->add_reconnected_cap(from, p->first, p->second); | |
969 | recover_filelocks(in, p->second.flockbl, m->get_orig_source().num()); | |
970 | continue; | |
971 | } | |
972 | ||
973 | if (in && !in->is_auth()) { | |
974 | // not mine. | |
975 | dout(10) << "non-auth " << *in << ", will pass off to authority" << dendl; | |
976 | // add to cap export list. | |
977 | p->second.path.clear(); // we don't need path | |
978 | mdcache->rejoin_export_caps(p->first, from, p->second, | |
979 | in->authority().first); | |
980 | } else { | |
981 | // don't know if the inode is mine | |
982 | dout(10) << "missing ino " << p->first << ", will load later" << dendl; | |
983 | p->second.path.clear(); // we don't need path | |
984 | mdcache->rejoin_recovered_caps(p->first, from, p->second, MDS_RANK_NONE); | |
985 | } | |
986 | } | |
987 | ||
988 | // remove from gather set | |
989 | client_reconnect_gather.erase(from); | |
990 | if (client_reconnect_gather.empty()) | |
991 | reconnect_gather_finish(); | |
992 | ||
993 | m->put(); | |
994 | } | |
995 | ||
996 | ||
997 | ||
998 | void Server::reconnect_gather_finish() | |
999 | { | |
1000 | dout(7) << "reconnect_gather_finish. failed on " << failed_reconnects << " clients" << dendl; | |
1001 | assert(reconnect_done); | |
1002 | reconnect_done->complete(0); | |
1003 | reconnect_done = NULL; | |
1004 | } | |
1005 | ||
1006 | void Server::reconnect_tick() | |
1007 | { | |
31f18b77 FG |
1008 | if (reconnect_evicting) { |
1009 | dout(4) << "reconnect_tick: waiting for evictions" << dendl; | |
1010 | return; | |
1011 | } | |
1012 | ||
7c673cae FG |
1013 | utime_t reconnect_end = reconnect_start; |
1014 | reconnect_end += g_conf->mds_reconnect_timeout; | |
1015 | if (ceph_clock_now() >= reconnect_end && | |
1016 | !client_reconnect_gather.empty()) { | |
1017 | dout(10) << "reconnect timed out" << dendl; | |
31f18b77 FG |
1018 | |
1019 | // If we're doing blacklist evictions, use this to wait for them before | |
1020 | // proceeding to reconnect_gather_finish | |
1021 | MDSGatherBuilder gather(g_ceph_context); | |
1022 | ||
7c673cae FG |
1023 | for (set<client_t>::iterator p = client_reconnect_gather.begin(); |
1024 | p != client_reconnect_gather.end(); | |
1025 | ++p) { | |
1026 | Session *session = mds->sessionmap.get_session(entity_name_t::CLIENT(p->v)); | |
1027 | assert(session); | |
1028 | dout(1) << "reconnect gave up on " << session->info.inst << dendl; | |
31f18b77 FG |
1029 | |
1030 | mds->clog->warn() << "evicting unresponsive client " << *session | |
1031 | << ", after waiting " << g_conf->mds_reconnect_timeout | |
1032 | << " seconds during MDS startup"; | |
1033 | ||
1034 | if (g_conf->mds_session_blacklist_on_timeout) { | |
1035 | std::stringstream ss; | |
1036 | mds->evict_client(session->info.inst.name.num(), false, true, ss, | |
1037 | gather.new_sub()); | |
1038 | } else { | |
1039 | kill_session(session, NULL); | |
1040 | } | |
1041 | ||
7c673cae FG |
1042 | failed_reconnects++; |
1043 | } | |
1044 | client_reconnect_gather.clear(); | |
31f18b77 FG |
1045 | |
1046 | if (gather.has_subs()) { | |
1047 | dout(1) << "reconnect will complete once clients are evicted" << dendl; | |
1048 | gather.set_finisher(new MDSInternalContextWrapper(mds, new FunctionContext( | |
1049 | [this](int r){reconnect_gather_finish();}))); | |
1050 | gather.activate(); | |
1051 | reconnect_evicting = true; | |
1052 | } else { | |
1053 | reconnect_gather_finish(); | |
1054 | } | |
7c673cae FG |
1055 | } |
1056 | } | |
1057 | ||
1058 | void Server::recover_filelocks(CInode *in, bufferlist locks, int64_t client) | |
1059 | { | |
1060 | if (!locks.length()) return; | |
1061 | int numlocks; | |
1062 | ceph_filelock lock; | |
1063 | bufferlist::iterator p = locks.begin(); | |
1064 | ::decode(numlocks, p); | |
1065 | for (int i = 0; i < numlocks; ++i) { | |
1066 | ::decode(lock, p); | |
1067 | lock.client = client; | |
1068 | in->get_fcntl_lock_state()->held_locks.insert(pair<uint64_t, ceph_filelock>(lock.start, lock)); | |
1069 | ++in->get_fcntl_lock_state()->client_held_lock_counts[client]; | |
1070 | } | |
1071 | ::decode(numlocks, p); | |
1072 | for (int i = 0; i < numlocks; ++i) { | |
1073 | ::decode(lock, p); | |
1074 | lock.client = client; | |
1075 | in->get_flock_lock_state()->held_locks.insert(pair<uint64_t, ceph_filelock> (lock.start, lock)); | |
1076 | ++in->get_flock_lock_state()->client_held_lock_counts[client]; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | ||
1081 | /** | |
1082 | * Call this when the MDCache is oversized, to send requests to the clients | |
1083 | * to trim some caps, and consequently unpin some inodes in the MDCache so | |
1084 | * that it can trim too. | |
1085 | */ | |
1086 | void Server::recall_client_state(float ratio) | |
1087 | { | |
1088 | int max_caps_per_client = (int)(g_conf->mds_cache_size * .8); | |
1089 | int min_caps_per_client = 100; | |
1090 | ||
1091 | dout(10) << "recall_client_state " << ratio | |
1092 | << ", caps per client " << min_caps_per_client << "-" << max_caps_per_client | |
1093 | << dendl; | |
1094 | ||
1095 | set<Session*> sessions; | |
1096 | mds->sessionmap.get_client_session_set(sessions); | |
1097 | for (set<Session*>::const_iterator p = sessions.begin(); | |
1098 | p != sessions.end(); | |
1099 | ++p) { | |
1100 | Session *session = *p; | |
1101 | if (!session->is_open() || | |
1102 | !session->info.inst.name.is_client()) | |
1103 | continue; | |
1104 | ||
1105 | dout(10) << " session " << session->info.inst | |
1106 | << " caps " << session->caps.size() | |
1107 | << ", leases " << session->leases.size() | |
1108 | << dendl; | |
1109 | ||
1110 | if (session->caps.size() > min_caps_per_client) { | |
1111 | int newlim = MIN((int)(session->caps.size() * ratio), max_caps_per_client); | |
1112 | if (session->caps.size() > newlim) { | |
1113 | MClientSession *m = new MClientSession(CEPH_SESSION_RECALL_STATE); | |
1114 | m->head.max_caps = newlim; | |
1115 | mds->send_message_client(m, session); | |
1116 | session->notify_recall_sent(newlim); | |
1117 | } | |
1118 | } | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | void Server::force_clients_readonly() | |
1123 | { | |
1124 | dout(10) << "force_clients_readonly" << dendl; | |
1125 | set<Session*> sessions; | |
1126 | mds->sessionmap.get_client_session_set(sessions); | |
1127 | for (set<Session*>::const_iterator p = sessions.begin(); | |
1128 | p != sessions.end(); | |
1129 | ++p) { | |
1130 | Session *session = *p; | |
1131 | if (!session->info.inst.name.is_client() || | |
1132 | !(session->is_open() || session->is_stale())) | |
1133 | continue; | |
1134 | mds->send_message_client(new MClientSession(CEPH_SESSION_FORCE_RO), session); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | /******* | |
1139 | * some generic stuff for finishing off requests | |
1140 | */ | |
1141 | void Server::journal_and_reply(MDRequestRef& mdr, CInode *in, CDentry *dn, LogEvent *le, MDSLogContextBase *fin) | |
1142 | { | |
1143 | dout(10) << "journal_and_reply tracei " << in << " tracedn " << dn << dendl; | |
1144 | assert(!mdr->has_completed); | |
1145 | ||
1146 | // note trace items for eventual reply. | |
1147 | mdr->tracei = in; | |
1148 | if (in) | |
1149 | mdr->pin(in); | |
1150 | ||
1151 | mdr->tracedn = dn; | |
1152 | if (dn) | |
1153 | mdr->pin(dn); | |
1154 | ||
1155 | early_reply(mdr, in, dn); | |
1156 | ||
1157 | mdr->committing = true; | |
1158 | submit_mdlog_entry(le, fin, mdr, __func__); | |
1159 | ||
1160 | if (mdr->client_request && mdr->client_request->is_queued_for_replay()) { | |
1161 | if (mds->queue_one_replay()) { | |
1162 | dout(10) << " queued next replay op" << dendl; | |
1163 | } else { | |
1164 | dout(10) << " journaled last replay op, flushing" << dendl; | |
1165 | mdlog->flush(); | |
1166 | } | |
1167 | } else if (mdr->did_early_reply) | |
1168 | mds->locker->drop_rdlocks(mdr.get()); | |
1169 | else | |
1170 | mdlog->flush(); | |
1171 | } | |
1172 | ||
1173 | void Server::submit_mdlog_entry(LogEvent *le, MDSLogContextBase *fin, MDRequestRef& mdr, | |
1174 | const char *event) | |
1175 | { | |
1176 | if (mdr) { | |
1177 | string event_str("submit entry: "); | |
1178 | event_str += event; | |
1179 | mdr->mark_event_string(event_str); | |
1180 | } | |
1181 | mdlog->submit_entry(le, fin); | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * send response built from mdr contents and error code; clean up mdr | |
1186 | */ | |
1187 | void Server::respond_to_request(MDRequestRef& mdr, int r) | |
1188 | { | |
1189 | if (mdr->client_request) { | |
1190 | reply_client_request(mdr, new MClientReply(mdr->client_request, r)); | |
1191 | ||
1192 | // add here to avoid counting ops multiple times (e.g., locks, loading) | |
1193 | switch(mdr->client_request->get_op()) { | |
1194 | case CEPH_MDS_OP_LOOKUPHASH: | |
1195 | logger->inc(l_mdss_req_lookuphash); | |
1196 | break; | |
1197 | case CEPH_MDS_OP_LOOKUPINO: | |
1198 | logger->inc(l_mdss_req_lookupino); | |
1199 | break; | |
1200 | case CEPH_MDS_OP_LOOKUPPARENT: | |
1201 | logger->inc(l_mdss_req_lookupparent); | |
1202 | break; | |
1203 | case CEPH_MDS_OP_LOOKUPNAME: | |
1204 | logger->inc(l_mdss_req_lookupname); | |
1205 | break; | |
1206 | case CEPH_MDS_OP_LOOKUP: | |
1207 | logger->inc(l_mdss_req_lookup); | |
1208 | break; | |
1209 | case CEPH_MDS_OP_LOOKUPSNAP: | |
1210 | logger->inc(l_mdss_req_lookupsnap); | |
1211 | break; | |
1212 | case CEPH_MDS_OP_GETATTR: | |
1213 | logger->inc(l_mdss_req_getattr); | |
1214 | break; | |
1215 | case CEPH_MDS_OP_SETATTR: | |
1216 | logger->inc(l_mdss_req_setattr); | |
1217 | break; | |
1218 | case CEPH_MDS_OP_SETLAYOUT: | |
1219 | logger->inc(l_mdss_req_setlayout); | |
1220 | break; | |
1221 | case CEPH_MDS_OP_SETDIRLAYOUT: | |
1222 | logger->inc(l_mdss_req_setdirlayout); | |
1223 | break; | |
1224 | case CEPH_MDS_OP_SETXATTR: | |
1225 | logger->inc(l_mdss_req_setxattr); | |
1226 | break; | |
1227 | case CEPH_MDS_OP_RMXATTR: | |
1228 | logger->inc(l_mdss_req_rmxattr); | |
1229 | break; | |
1230 | case CEPH_MDS_OP_READDIR: | |
1231 | logger->inc(l_mdss_req_readdir); | |
1232 | break; | |
1233 | case CEPH_MDS_OP_SETFILELOCK: | |
1234 | logger->inc(l_mdss_req_setfilelock); | |
1235 | break; | |
1236 | case CEPH_MDS_OP_GETFILELOCK: | |
1237 | logger->inc(l_mdss_req_getfilelock); | |
1238 | break; | |
1239 | case CEPH_MDS_OP_CREATE: | |
1240 | logger->inc(l_mdss_req_create); | |
1241 | case CEPH_MDS_OP_OPEN: | |
1242 | logger->inc(l_mdss_req_open); | |
1243 | break; | |
1244 | case CEPH_MDS_OP_MKNOD: | |
1245 | logger->inc(l_mdss_req_mknod); | |
1246 | break; | |
1247 | case CEPH_MDS_OP_LINK: | |
1248 | logger->inc(l_mdss_req_link); | |
1249 | break; | |
1250 | case CEPH_MDS_OP_UNLINK: | |
1251 | logger->inc(l_mdss_req_unlink); | |
1252 | break; | |
1253 | case CEPH_MDS_OP_RMDIR: | |
1254 | logger->inc(l_mdss_req_rmdir); | |
1255 | break; | |
1256 | case CEPH_MDS_OP_RENAME: | |
1257 | logger->inc(l_mdss_req_rename); | |
1258 | break; | |
1259 | case CEPH_MDS_OP_MKDIR: | |
1260 | logger->inc(l_mdss_req_mkdir); | |
1261 | break; | |
1262 | case CEPH_MDS_OP_SYMLINK: | |
1263 | logger->inc(l_mdss_req_symlink); | |
1264 | break; | |
1265 | case CEPH_MDS_OP_LSSNAP: | |
1266 | logger->inc(l_mdss_req_lssnap); | |
1267 | break; | |
1268 | case CEPH_MDS_OP_MKSNAP: | |
1269 | logger->inc(l_mdss_req_mksnap); | |
1270 | break; | |
1271 | case CEPH_MDS_OP_RMSNAP: | |
1272 | logger->inc(l_mdss_req_rmsnap); | |
1273 | break; | |
1274 | case CEPH_MDS_OP_RENAMESNAP: | |
1275 | logger->inc(l_mdss_req_renamesnap); | |
1276 | break; | |
1277 | } | |
1278 | } else if (mdr->internal_op > -1) { | |
1279 | dout(10) << "respond_to_request on internal request " << mdr << dendl; | |
1280 | if (!mdr->internal_op_finish) | |
1281 | assert(0 == "trying to respond to internal op without finisher"); | |
1282 | mdr->internal_op_finish->complete(r); | |
1283 | mdcache->request_finish(mdr); | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | void Server::early_reply(MDRequestRef& mdr, CInode *tracei, CDentry *tracedn) | |
1288 | { | |
1289 | if (!g_conf->mds_early_reply) | |
1290 | return; | |
1291 | ||
1292 | if (mdr->has_more() && mdr->more()->has_journaled_slaves) { | |
1293 | dout(10) << "early_reply - there are journaled slaves, not allowed." << dendl; | |
1294 | return; | |
1295 | } | |
1296 | ||
1297 | if (mdr->alloc_ino) { | |
1298 | dout(10) << "early_reply - allocated ino, not allowed" << dendl; | |
1299 | return; | |
1300 | } | |
1301 | ||
1302 | MClientRequest *req = mdr->client_request; | |
1303 | entity_inst_t client_inst = req->get_source_inst(); | |
1304 | if (client_inst.name.is_mds()) | |
1305 | return; | |
1306 | ||
1307 | if (req->is_replay()) { | |
1308 | dout(10) << " no early reply on replay op" << dendl; | |
1309 | return; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | MClientReply *reply = new MClientReply(req, 0); | |
1314 | reply->set_unsafe(); | |
1315 | ||
1316 | // mark xlocks "done", indicating that we are exposing uncommitted changes. | |
1317 | // | |
1318 | //_rename_finish() does not send dentry link/unlink message to replicas. | |
1319 | // so do not set xlocks on dentries "done", the xlocks prevent dentries | |
1320 | // that have projected linkages from getting new replica. | |
1321 | mds->locker->set_xlocks_done(mdr.get(), req->get_op() == CEPH_MDS_OP_RENAME); | |
1322 | ||
1323 | dout(10) << "early_reply " << reply->get_result() | |
1324 | << " (" << cpp_strerror(reply->get_result()) | |
1325 | << ") " << *req << dendl; | |
1326 | ||
1327 | if (tracei || tracedn) { | |
1328 | if (tracei) | |
1329 | mdr->cap_releases.erase(tracei->vino()); | |
1330 | if (tracedn) | |
1331 | mdr->cap_releases.erase(tracedn->get_dir()->get_inode()->vino()); | |
1332 | ||
1333 | set_trace_dist(mdr->session, reply, tracei, tracedn, mdr->snapid, | |
1334 | req->get_dentry_wanted(), mdr); | |
1335 | } | |
1336 | ||
1337 | reply->set_extra_bl(mdr->reply_extra_bl); | |
1338 | req->get_connection()->send_message(reply); | |
1339 | ||
1340 | mdr->did_early_reply = true; | |
1341 | ||
1342 | mds->logger->inc(l_mds_reply); | |
1343 | utime_t lat = ceph_clock_now() - req->get_recv_stamp(); | |
1344 | mds->logger->tinc(l_mds_reply_latency, lat); | |
1345 | dout(20) << "lat " << lat << dendl; | |
1346 | ||
1347 | mdr->mark_event("early_replied"); | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * send given reply | |
1352 | * include a trace to tracei | |
1353 | * Clean up mdr | |
1354 | */ | |
1355 | void Server::reply_client_request(MDRequestRef& mdr, MClientReply *reply) | |
1356 | { | |
1357 | assert(mdr.get()); | |
1358 | MClientRequest *req = mdr->client_request; | |
1359 | ||
1360 | dout(7) << "reply_client_request " << reply->get_result() | |
1361 | << " (" << cpp_strerror(reply->get_result()) | |
1362 | << ") " << *req << dendl; | |
1363 | ||
1364 | mdr->mark_event("replying"); | |
1365 | ||
1366 | Session *session = mdr->session; | |
1367 | ||
1368 | // note successful request in session map? | |
1369 | // | |
1370 | // setfilelock requests are special, they only modify states in MDS memory. | |
1371 | // The states get lost when MDS fails. If Client re-send a completed | |
1372 | // setfilelock request, it means that client did not receive corresponding | |
1373 | // setfilelock reply. So MDS should re-execute the setfilelock request. | |
1374 | if (req->may_write() && req->get_op() != CEPH_MDS_OP_SETFILELOCK && | |
1375 | reply->get_result() == 0 && session) { | |
1376 | inodeno_t created = mdr->alloc_ino ? mdr->alloc_ino : mdr->used_prealloc_ino; | |
1377 | session->add_completed_request(mdr->reqid.tid, created); | |
1378 | if (mdr->ls) { | |
1379 | mdr->ls->touched_sessions.insert(session->info.inst.name); | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | // give any preallocated inos to the session | |
1384 | apply_allocated_inos(mdr, session); | |
1385 | ||
1386 | // get tracei/tracedn from mdr? | |
1387 | snapid_t snapid = mdr->snapid; | |
1388 | CInode *tracei = mdr->tracei; | |
1389 | CDentry *tracedn = mdr->tracedn; | |
1390 | ||
1391 | bool is_replay = mdr->client_request->is_replay(); | |
1392 | bool did_early_reply = mdr->did_early_reply; | |
1393 | entity_inst_t client_inst = req->get_source_inst(); | |
1394 | int dentry_wanted = req->get_dentry_wanted(); | |
1395 | ||
1396 | if (!did_early_reply && !is_replay) { | |
1397 | ||
1398 | mds->logger->inc(l_mds_reply); | |
1399 | utime_t lat = ceph_clock_now() - mdr->client_request->get_recv_stamp(); | |
1400 | mds->logger->tinc(l_mds_reply_latency, lat); | |
1401 | dout(20) << "lat " << lat << dendl; | |
1402 | ||
1403 | if (tracei) | |
1404 | mdr->cap_releases.erase(tracei->vino()); | |
1405 | if (tracedn) | |
1406 | mdr->cap_releases.erase(tracedn->get_dir()->get_inode()->vino()); | |
1407 | } | |
1408 | ||
1409 | // drop non-rdlocks before replying, so that we can issue leases | |
1410 | mdcache->request_drop_non_rdlocks(mdr); | |
1411 | ||
1412 | // reply at all? | |
1413 | if (client_inst.name.is_mds() || !session) { | |
1414 | reply->put(); // mds doesn't need a reply | |
1415 | reply = 0; | |
1416 | } else { | |
1417 | // send reply. | |
1418 | if (!did_early_reply && // don't issue leases if we sent an earlier reply already | |
1419 | (tracei || tracedn)) { | |
1420 | if (is_replay) { | |
1421 | if (tracei) | |
1422 | mdcache->try_reconnect_cap(tracei, session); | |
1423 | } else { | |
1424 | // include metadata in reply | |
1425 | set_trace_dist(session, reply, tracei, tracedn, | |
1426 | snapid, dentry_wanted, | |
1427 | mdr); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | // We can set the extra bl unconditionally: if it's already been sent in the | |
1432 | // early_reply, set_extra_bl will have claimed it and reply_extra_bl is empty | |
1433 | reply->set_extra_bl(mdr->reply_extra_bl); | |
1434 | ||
1435 | reply->set_mdsmap_epoch(mds->mdsmap->get_epoch()); | |
1436 | req->get_connection()->send_message(reply); | |
1437 | } | |
1438 | ||
1439 | if (req->is_queued_for_replay() && | |
1440 | (mdr->has_completed || reply->get_result() < 0)) { | |
1441 | if (reply->get_result() < 0) { | |
1442 | int r = reply->get_result(); | |
1443 | derr << "reply_client_request: failed to replay " << *req | |
1444 | << " error " << r << " (" << cpp_strerror(r) << ")" << dendl; | |
1445 | mds->clog->warn() << "failed to replay " << req->get_reqid() << " error " << r; | |
1446 | } | |
1447 | mds->queue_one_replay(); | |
1448 | } | |
1449 | ||
1450 | // clean up request | |
1451 | mdcache->request_finish(mdr); | |
1452 | ||
1453 | // take a closer look at tracei, if it happens to be a remote link | |
1454 | if (tracei && | |
1455 | tracedn && | |
1456 | tracedn->get_projected_linkage()->is_remote()) { | |
1457 | mdcache->eval_remote(tracedn); | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | ||
1462 | void Server::encode_empty_dirstat(bufferlist& bl) | |
1463 | { | |
1464 | static DirStat empty; | |
1465 | empty.encode(bl); | |
1466 | } | |
1467 | ||
1468 | void Server::encode_infinite_lease(bufferlist& bl) | |
1469 | { | |
1470 | LeaseStat e; | |
1471 | e.seq = 0; | |
1472 | e.mask = -1; | |
1473 | e.duration_ms = -1; | |
1474 | ::encode(e, bl); | |
1475 | dout(20) << "encode_infinite_lease " << e << dendl; | |
1476 | } | |
1477 | ||
1478 | void Server::encode_null_lease(bufferlist& bl) | |
1479 | { | |
1480 | LeaseStat e; | |
1481 | e.seq = 0; | |
1482 | e.mask = 0; | |
1483 | e.duration_ms = 0; | |
1484 | ::encode(e, bl); | |
1485 | dout(20) << "encode_null_lease " << e << dendl; | |
1486 | } | |
1487 | ||
1488 | ||
1489 | /* | |
1490 | * pass inode OR dentry (not both, or we may get confused) | |
1491 | * | |
1492 | * trace is in reverse order (i.e. root inode comes last) | |
1493 | */ | |
1494 | void Server::set_trace_dist(Session *session, MClientReply *reply, | |
1495 | CInode *in, CDentry *dn, | |
1496 | snapid_t snapid, | |
1497 | int dentry_wanted, | |
1498 | MDRequestRef& mdr) | |
1499 | { | |
1500 | // skip doing this for debugging purposes? | |
1501 | if (g_conf->mds_inject_traceless_reply_probability && | |
1502 | mdr->ls && !mdr->o_trunc && | |
1503 | (rand() % 10000 < g_conf->mds_inject_traceless_reply_probability * 10000.0)) { | |
1504 | dout(5) << "deliberately skipping trace for " << *reply << dendl; | |
1505 | return; | |
1506 | } | |
1507 | ||
1508 | // inode, dentry, dir, ..., inode | |
1509 | bufferlist bl; | |
1510 | mds_rank_t whoami = mds->get_nodeid(); | |
1511 | client_t client = session->get_client(); | |
1512 | utime_t now = ceph_clock_now(); | |
1513 | ||
1514 | dout(20) << "set_trace_dist snapid " << snapid << dendl; | |
1515 | ||
1516 | //assert((bool)dn == (bool)dentry_wanted); // not true for snapshot lookups | |
1517 | ||
1518 | // realm | |
1519 | if (snapid == CEPH_NOSNAP) { | |
1520 | SnapRealm *realm; | |
1521 | if (in) | |
1522 | realm = in->find_snaprealm(); | |
1523 | else | |
1524 | realm = dn->get_dir()->get_inode()->find_snaprealm(); | |
1525 | reply->snapbl = realm->get_snap_trace(); | |
1526 | dout(10) << "set_trace_dist snaprealm " << *realm << " len=" << reply->snapbl.length() << dendl; | |
1527 | } | |
1528 | ||
1529 | // dir + dentry? | |
1530 | if (dn) { | |
1531 | reply->head.is_dentry = 1; | |
1532 | CDir *dir = dn->get_dir(); | |
1533 | CInode *diri = dir->get_inode(); | |
1534 | ||
1535 | diri->encode_inodestat(bl, session, NULL, snapid); | |
1536 | dout(20) << "set_trace_dist added diri " << *diri << dendl; | |
1537 | ||
1538 | #ifdef MDS_VERIFY_FRAGSTAT | |
1539 | if (dir->is_complete()) | |
1540 | dir->verify_fragstat(); | |
1541 | #endif | |
1542 | dir->encode_dirstat(bl, whoami); | |
1543 | dout(20) << "set_trace_dist added dir " << *dir << dendl; | |
1544 | ||
1545 | ::encode(dn->get_name(), bl); | |
1546 | if (snapid == CEPH_NOSNAP) | |
1547 | mds->locker->issue_client_lease(dn, client, bl, now, session); | |
1548 | else | |
1549 | encode_null_lease(bl); | |
1550 | dout(20) << "set_trace_dist added dn " << snapid << " " << *dn << dendl; | |
1551 | } else | |
1552 | reply->head.is_dentry = 0; | |
1553 | ||
1554 | // inode | |
1555 | if (in) { | |
1556 | in->encode_inodestat(bl, session, NULL, snapid, 0, mdr->getattr_caps); | |
1557 | dout(20) << "set_trace_dist added in " << *in << dendl; | |
1558 | reply->head.is_target = 1; | |
1559 | } else | |
1560 | reply->head.is_target = 0; | |
1561 | ||
1562 | reply->set_trace(bl); | |
1563 | } | |
1564 | ||
1565 | ||
1566 | ||
1567 | ||
1568 | /*** | |
1569 | * process a client request | |
1570 | * This function DOES put the passed message before returning | |
1571 | */ | |
1572 | void Server::handle_client_request(MClientRequest *req) | |
1573 | { | |
1574 | dout(4) << "handle_client_request " << *req << dendl; | |
1575 | ||
1576 | if (mds->logger) | |
1577 | mds->logger->inc(l_mds_request); | |
1578 | if (logger) | |
1579 | logger->inc(l_mdss_handle_client_request); | |
1580 | ||
1581 | if (!mdcache->is_open()) { | |
1582 | dout(5) << "waiting for root" << dendl; | |
1583 | mdcache->wait_for_open(new C_MDS_RetryMessage(mds, req)); | |
1584 | return; | |
1585 | } | |
1586 | ||
1587 | // active session? | |
1588 | Session *session = 0; | |
1589 | if (req->get_source().is_client()) { | |
1590 | session = get_session(req); | |
1591 | if (!session) { | |
1592 | dout(5) << "no session for " << req->get_source() << ", dropping" << dendl; | |
1593 | } else if (session->is_closed() || | |
1594 | session->is_closing() || | |
1595 | session->is_killing()) { | |
1596 | dout(5) << "session closed|closing|killing, dropping" << dendl; | |
1597 | session = NULL; | |
1598 | } | |
1599 | if (!session) { | |
1600 | if (req->is_queued_for_replay()) | |
1601 | mds->queue_one_replay(); | |
1602 | req->put(); | |
1603 | return; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | // old mdsmap? | |
1608 | if (req->get_mdsmap_epoch() < mds->mdsmap->get_epoch()) { | |
1609 | // send it? hrm, this isn't ideal; they may get a lot of copies if | |
1610 | // they have a high request rate. | |
1611 | } | |
1612 | ||
1613 | // completed request? | |
1614 | bool has_completed = false; | |
1615 | if (req->is_replay() || req->get_retry_attempt()) { | |
1616 | assert(session); | |
1617 | inodeno_t created; | |
1618 | if (session->have_completed_request(req->get_reqid().tid, &created)) { | |
1619 | has_completed = true; | |
1620 | // Don't send traceless reply if the completed request has created | |
1621 | // new inode. Treat the request as lookup request instead. | |
1622 | if (req->is_replay() || | |
1623 | ((created == inodeno_t() || !mds->is_clientreplay()) && | |
1624 | req->get_op() != CEPH_MDS_OP_OPEN && | |
1625 | req->get_op() != CEPH_MDS_OP_CREATE)) { | |
1626 | dout(5) << "already completed " << req->get_reqid() << dendl; | |
1627 | MClientReply *reply = new MClientReply(req, 0); | |
1628 | if (created != inodeno_t()) { | |
1629 | bufferlist extra; | |
1630 | ::encode(created, extra); | |
1631 | reply->set_extra_bl(extra); | |
1632 | } | |
1633 | req->get_connection()->send_message(reply); | |
1634 | ||
1635 | if (req->is_queued_for_replay()) | |
1636 | mds->queue_one_replay(); | |
1637 | ||
1638 | req->put(); | |
1639 | return; | |
1640 | } | |
1641 | if (req->get_op() != CEPH_MDS_OP_OPEN && | |
1642 | req->get_op() != CEPH_MDS_OP_CREATE) { | |
1643 | dout(10) << " completed request which created new inode " << created | |
1644 | << ", convert it to lookup request" << dendl; | |
1645 | req->head.op = req->get_dentry_wanted() ? CEPH_MDS_OP_LOOKUP : CEPH_MDS_OP_GETATTR; | |
1646 | req->head.args.getattr.mask = CEPH_STAT_CAP_INODE_ALL; | |
1647 | } | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | // trim completed_request list | |
1652 | if (req->get_oldest_client_tid() > 0) { | |
1653 | dout(15) << " oldest_client_tid=" << req->get_oldest_client_tid() << dendl; | |
1654 | assert(session); | |
1655 | if (session->trim_completed_requests(req->get_oldest_client_tid())) { | |
1656 | // Sessions 'completed_requests' was dirtied, mark it to be | |
1657 | // potentially flushed at segment expiry. | |
1658 | mdlog->get_current_segment()->touched_sessions.insert(session->info.inst.name); | |
1659 | ||
1660 | if (session->get_num_trim_requests_warnings() > 0 && | |
1661 | session->get_num_completed_requests() * 2 < g_conf->mds_max_completed_requests) | |
1662 | session->reset_num_trim_requests_warnings(); | |
1663 | } else { | |
1664 | if (session->get_num_completed_requests() >= | |
1665 | (g_conf->mds_max_completed_requests << session->get_num_trim_requests_warnings())) { | |
1666 | session->inc_num_trim_requests_warnings(); | |
1667 | stringstream ss; | |
1668 | ss << "client." << session->get_client() << " does not advance its oldest_client_tid (" | |
1669 | << req->get_oldest_client_tid() << "), " | |
1670 | << session->get_num_completed_requests() | |
1671 | << " completed requests recorded in session\n"; | |
1672 | mds->clog->warn() << ss.str(); | |
1673 | dout(20) << __func__ << " " << ss.str() << dendl; | |
1674 | } | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | // register + dispatch | |
1679 | MDRequestRef mdr = mdcache->request_start(req); | |
1680 | if (!mdr.get()) | |
1681 | return; | |
1682 | ||
1683 | if (session) { | |
1684 | mdr->session = session; | |
1685 | session->requests.push_back(&mdr->item_session_request); | |
1686 | } | |
1687 | ||
1688 | if (has_completed) | |
1689 | mdr->has_completed = true; | |
1690 | ||
1691 | // process embedded cap releases? | |
1692 | // (only if NOT replay!) | |
1693 | if (!req->releases.empty() && req->get_source().is_client() && !req->is_replay()) { | |
1694 | client_t client = req->get_source().num(); | |
1695 | for (vector<MClientRequest::Release>::iterator p = req->releases.begin(); | |
1696 | p != req->releases.end(); | |
1697 | ++p) | |
1698 | mds->locker->process_request_cap_release(mdr, client, p->item, p->dname); | |
1699 | req->releases.clear(); | |
1700 | } | |
1701 | ||
1702 | dispatch_client_request(mdr); | |
1703 | return; | |
1704 | } | |
1705 | ||
1706 | void Server::handle_osd_map() | |
1707 | { | |
1708 | /* Note that we check the OSDMAP_FULL flag directly rather than | |
1709 | * using osdmap_full_flag(), because we want to know "is the flag set" | |
1710 | * rather than "does the flag apply to us?" */ | |
1711 | mds->objecter->with_osdmap([this](const OSDMap& o) { | |
1712 | is_full = o.test_flag(CEPH_OSDMAP_FULL); | |
1713 | dout(7) << __func__ << ": full = " << is_full << " epoch = " | |
1714 | << o.get_epoch() << dendl; | |
1715 | }); | |
1716 | } | |
1717 | ||
1718 | void Server::dispatch_client_request(MDRequestRef& mdr) | |
1719 | { | |
1720 | // we shouldn't be waiting on anyone. | |
1721 | assert(!mdr->has_more() || mdr->more()->waiting_on_slave.empty()); | |
1722 | ||
1723 | if (mdr->killed) { | |
1724 | dout(10) << "request " << *mdr << " was killed" << dendl; | |
1725 | return; | |
1726 | } | |
1727 | ||
1728 | MClientRequest *req = mdr->client_request; | |
1729 | ||
1730 | if (logger) logger->inc(l_mdss_dispatch_client_request); | |
1731 | ||
1732 | dout(7) << "dispatch_client_request " << *req << dendl; | |
1733 | ||
1734 | if (req->may_write()) { | |
1735 | if (mdcache->is_readonly()) { | |
1736 | dout(10) << " read-only FS" << dendl; | |
1737 | respond_to_request(mdr, -EROFS); | |
1738 | return; | |
1739 | } | |
1740 | if (mdr->has_more() && mdr->more()->slave_error) { | |
1741 | dout(10) << " got error from slaves" << dendl; | |
1742 | respond_to_request(mdr, mdr->more()->slave_error); | |
1743 | return; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | if (is_full) { | |
1748 | if (req->get_op() == CEPH_MDS_OP_SETLAYOUT || | |
1749 | req->get_op() == CEPH_MDS_OP_SETDIRLAYOUT || | |
1750 | req->get_op() == CEPH_MDS_OP_SETLAYOUT || | |
1751 | req->get_op() == CEPH_MDS_OP_RMXATTR || | |
1752 | req->get_op() == CEPH_MDS_OP_SETXATTR || | |
1753 | req->get_op() == CEPH_MDS_OP_CREATE || | |
1754 | req->get_op() == CEPH_MDS_OP_SYMLINK || | |
1755 | req->get_op() == CEPH_MDS_OP_MKSNAP || | |
1756 | ((req->get_op() == CEPH_MDS_OP_LINK || | |
1757 | req->get_op() == CEPH_MDS_OP_RENAME) && | |
1758 | (!mdr->has_more() || mdr->more()->witnessed.empty())) // haven't started slave request | |
1759 | ) { | |
1760 | ||
1761 | dout(20) << __func__ << ": full, responding ENOSPC to op " << ceph_mds_op_name(req->get_op()) << dendl; | |
1762 | respond_to_request(mdr, -ENOSPC); | |
1763 | return; | |
1764 | } else { | |
1765 | dout(20) << __func__ << ": full, permitting op " << ceph_mds_op_name(req->get_op()) << dendl; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | switch (req->get_op()) { | |
1770 | case CEPH_MDS_OP_LOOKUPHASH: | |
1771 | case CEPH_MDS_OP_LOOKUPINO: | |
1772 | handle_client_lookup_ino(mdr, false, false); | |
1773 | break; | |
1774 | case CEPH_MDS_OP_LOOKUPPARENT: | |
1775 | handle_client_lookup_ino(mdr, true, false); | |
1776 | break; | |
1777 | case CEPH_MDS_OP_LOOKUPNAME: | |
1778 | handle_client_lookup_ino(mdr, false, true); | |
1779 | break; | |
1780 | ||
1781 | // inodes ops. | |
1782 | case CEPH_MDS_OP_LOOKUP: | |
1783 | handle_client_getattr(mdr, true); | |
1784 | break; | |
1785 | ||
1786 | case CEPH_MDS_OP_LOOKUPSNAP: | |
1787 | // lookupsnap does not reference a CDentry; treat it as a getattr | |
1788 | case CEPH_MDS_OP_GETATTR: | |
1789 | handle_client_getattr(mdr, false); | |
1790 | break; | |
1791 | ||
1792 | case CEPH_MDS_OP_SETATTR: | |
1793 | handle_client_setattr(mdr); | |
1794 | break; | |
1795 | case CEPH_MDS_OP_SETLAYOUT: | |
1796 | handle_client_setlayout(mdr); | |
1797 | break; | |
1798 | case CEPH_MDS_OP_SETDIRLAYOUT: | |
1799 | handle_client_setdirlayout(mdr); | |
1800 | break; | |
1801 | case CEPH_MDS_OP_SETXATTR: | |
1802 | handle_client_setxattr(mdr); | |
1803 | break; | |
1804 | case CEPH_MDS_OP_RMXATTR: | |
1805 | handle_client_removexattr(mdr); | |
1806 | break; | |
1807 | ||
1808 | case CEPH_MDS_OP_READDIR: | |
1809 | handle_client_readdir(mdr); | |
1810 | break; | |
1811 | ||
1812 | case CEPH_MDS_OP_SETFILELOCK: | |
1813 | handle_client_file_setlock(mdr); | |
1814 | break; | |
1815 | ||
1816 | case CEPH_MDS_OP_GETFILELOCK: | |
1817 | handle_client_file_readlock(mdr); | |
1818 | break; | |
1819 | ||
1820 | // funky. | |
1821 | case CEPH_MDS_OP_CREATE: | |
1822 | if (mdr->has_completed) | |
1823 | handle_client_open(mdr); // already created.. just open | |
1824 | else | |
1825 | handle_client_openc(mdr); | |
1826 | break; | |
1827 | ||
1828 | case CEPH_MDS_OP_OPEN: | |
1829 | handle_client_open(mdr); | |
1830 | break; | |
1831 | ||
1832 | // namespace. | |
1833 | // no prior locks. | |
1834 | case CEPH_MDS_OP_MKNOD: | |
1835 | handle_client_mknod(mdr); | |
1836 | break; | |
1837 | case CEPH_MDS_OP_LINK: | |
1838 | handle_client_link(mdr); | |
1839 | break; | |
1840 | case CEPH_MDS_OP_UNLINK: | |
1841 | case CEPH_MDS_OP_RMDIR: | |
1842 | handle_client_unlink(mdr); | |
1843 | break; | |
1844 | case CEPH_MDS_OP_RENAME: | |
1845 | handle_client_rename(mdr); | |
1846 | break; | |
1847 | case CEPH_MDS_OP_MKDIR: | |
1848 | handle_client_mkdir(mdr); | |
1849 | break; | |
1850 | case CEPH_MDS_OP_SYMLINK: | |
1851 | handle_client_symlink(mdr); | |
1852 | break; | |
1853 | ||
1854 | ||
1855 | // snaps | |
1856 | case CEPH_MDS_OP_LSSNAP: | |
1857 | handle_client_lssnap(mdr); | |
1858 | break; | |
1859 | case CEPH_MDS_OP_MKSNAP: | |
1860 | handle_client_mksnap(mdr); | |
1861 | break; | |
1862 | case CEPH_MDS_OP_RMSNAP: | |
1863 | handle_client_rmsnap(mdr); | |
1864 | break; | |
1865 | case CEPH_MDS_OP_RENAMESNAP: | |
1866 | handle_client_renamesnap(mdr); | |
1867 | break; | |
1868 | ||
1869 | default: | |
1870 | dout(1) << " unknown client op " << req->get_op() << dendl; | |
1871 | respond_to_request(mdr, -EOPNOTSUPP); | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | ||
1876 | // --------------------------------------- | |
1877 | // SLAVE REQUESTS | |
1878 | ||
1879 | /* This function DOES put the passed message before returning*/ | |
1880 | void Server::handle_slave_request(MMDSSlaveRequest *m) | |
1881 | { | |
1882 | dout(4) << "handle_slave_request " << m->get_reqid() << " from " << m->get_source() << dendl; | |
1883 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
1884 | ||
1885 | if (logger) logger->inc(l_mdss_handle_slave_request); | |
1886 | ||
1887 | // reply? | |
1888 | if (m->is_reply()) | |
1889 | return handle_slave_request_reply(m); | |
1890 | ||
1891 | // the purpose of rename notify is enforcing causal message ordering. making sure | |
1892 | // bystanders have received all messages from rename srcdn's auth MDS. | |
1893 | if (m->get_op() == MMDSSlaveRequest::OP_RENAMENOTIFY) { | |
1894 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(m->get_reqid(), m->get_attempt(), | |
1895 | MMDSSlaveRequest::OP_RENAMENOTIFYACK); | |
1896 | mds->send_message(reply, m->get_connection()); | |
1897 | m->put(); | |
1898 | return; | |
1899 | } | |
1900 | ||
1901 | CDentry *straydn = NULL; | |
1902 | if (m->stray.length() > 0) { | |
1903 | straydn = mdcache->add_replica_stray(m->stray, from); | |
1904 | assert(straydn); | |
1905 | m->stray.clear(); | |
1906 | } | |
1907 | ||
1908 | // am i a new slave? | |
1909 | MDRequestRef mdr; | |
1910 | if (mdcache->have_request(m->get_reqid())) { | |
1911 | // existing? | |
1912 | mdr = mdcache->request_get(m->get_reqid()); | |
1913 | ||
1914 | // is my request newer? | |
1915 | if (mdr->attempt > m->get_attempt()) { | |
1916 | dout(10) << "local request " << *mdr << " attempt " << mdr->attempt << " > " << m->get_attempt() | |
1917 | << ", dropping " << *m << dendl; | |
1918 | m->put(); | |
1919 | return; | |
1920 | } | |
1921 | ||
1922 | ||
1923 | if (mdr->attempt < m->get_attempt()) { | |
1924 | // mine is old, close it out | |
1925 | dout(10) << "local request " << *mdr << " attempt " << mdr->attempt << " < " << m->get_attempt() | |
1926 | << ", closing out" << dendl; | |
1927 | mdcache->request_finish(mdr); | |
1928 | mdr.reset(); | |
1929 | } else if (mdr->slave_to_mds != from) { | |
1930 | dout(10) << "local request " << *mdr << " not slave to mds." << from << dendl; | |
1931 | m->put(); | |
1932 | return; | |
1933 | } | |
1934 | ||
1935 | if (m->get_op() == MMDSSlaveRequest::OP_FINISH && m->is_abort()) { | |
1936 | mdr->aborted = true; | |
1937 | if (mdr->slave_request) { | |
1938 | // only abort on-going xlock, wrlock and auth pin | |
1939 | assert(!mdr->slave_did_prepare()); | |
1940 | } else { | |
1941 | mdcache->request_finish(mdr); | |
1942 | } | |
1943 | return; | |
1944 | } | |
1945 | } | |
1946 | if (!mdr.get()) { | |
1947 | // new? | |
1948 | if (m->get_op() == MMDSSlaveRequest::OP_FINISH) { | |
1949 | dout(10) << "missing slave request for " << m->get_reqid() | |
1950 | << " OP_FINISH, must have lost race with a forward" << dendl; | |
1951 | m->put(); | |
1952 | return; | |
1953 | } | |
1954 | mdr = mdcache->request_start_slave(m->get_reqid(), m->get_attempt(), m); | |
1955 | mdr->set_op_stamp(m->op_stamp); | |
1956 | } | |
1957 | assert(mdr->slave_request == 0); // only one at a time, please! | |
1958 | ||
1959 | if (straydn) { | |
1960 | mdr->pin(straydn); | |
1961 | mdr->straydn = straydn; | |
1962 | } | |
1963 | ||
1964 | if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) { | |
1965 | dout(3) << "not clientreplay|active yet, waiting" << dendl; | |
1966 | mds->wait_for_replay(new C_MDS_RetryMessage(mds, m)); | |
1967 | return; | |
1968 | } else if (mds->is_clientreplay() && !mds->mdsmap->is_clientreplay(from) && | |
1969 | mdr->locks.empty()) { | |
1970 | dout(3) << "not active yet, waiting" << dendl; | |
1971 | mds->wait_for_active(new C_MDS_RetryMessage(mds, m)); | |
1972 | return; | |
1973 | } | |
1974 | ||
1975 | mdr->slave_request = m; | |
1976 | ||
1977 | dispatch_slave_request(mdr); | |
1978 | } | |
1979 | ||
1980 | /* This function DOES put the passed message before returning*/ | |
1981 | void Server::handle_slave_request_reply(MMDSSlaveRequest *m) | |
1982 | { | |
1983 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
1984 | ||
1985 | if (!mds->is_clientreplay() && !mds->is_active() && !mds->is_stopping()) { | |
1986 | metareqid_t r = m->get_reqid(); | |
1987 | if (!mdcache->have_uncommitted_master(r, from)) { | |
1988 | dout(10) << "handle_slave_request_reply ignoring slave reply from mds." | |
1989 | << from << " reqid " << r << dendl; | |
1990 | m->put(); | |
1991 | return; | |
1992 | } | |
1993 | dout(3) << "not clientreplay|active yet, waiting" << dendl; | |
1994 | mds->wait_for_replay(new C_MDS_RetryMessage(mds, m)); | |
1995 | return; | |
1996 | } | |
1997 | ||
1998 | if (m->get_op() == MMDSSlaveRequest::OP_COMMITTED) { | |
1999 | metareqid_t r = m->get_reqid(); | |
2000 | mdcache->committed_master_slave(r, from); | |
2001 | m->put(); | |
2002 | return; | |
2003 | } | |
2004 | ||
2005 | MDRequestRef mdr = mdcache->request_get(m->get_reqid()); | |
2006 | if (m->get_attempt() != mdr->attempt) { | |
2007 | dout(10) << "handle_slave_request_reply " << *mdr << " ignoring reply from other attempt " | |
2008 | << m->get_attempt() << dendl; | |
2009 | m->put(); | |
2010 | return; | |
2011 | } | |
2012 | ||
2013 | switch (m->get_op()) { | |
2014 | case MMDSSlaveRequest::OP_XLOCKACK: | |
2015 | { | |
2016 | // identify lock, master request | |
2017 | SimpleLock *lock = mds->locker->get_lock(m->get_lock_type(), | |
2018 | m->get_object_info()); | |
2019 | mdr->more()->slaves.insert(from); | |
2020 | dout(10) << "got remote xlock on " << *lock << " on " << *lock->get_parent() << dendl; | |
2021 | mdr->xlocks.insert(lock); | |
2022 | mdr->locks.insert(lock); | |
2023 | mdr->finish_locking(lock); | |
2024 | lock->get_xlock(mdr, mdr->get_client()); | |
2025 | ||
2026 | assert(mdr->more()->waiting_on_slave.count(from)); | |
2027 | mdr->more()->waiting_on_slave.erase(from); | |
2028 | assert(mdr->more()->waiting_on_slave.empty()); | |
2029 | mdcache->dispatch_request(mdr); | |
2030 | } | |
2031 | break; | |
2032 | ||
2033 | case MMDSSlaveRequest::OP_WRLOCKACK: | |
2034 | { | |
2035 | // identify lock, master request | |
2036 | SimpleLock *lock = mds->locker->get_lock(m->get_lock_type(), | |
2037 | m->get_object_info()); | |
2038 | mdr->more()->slaves.insert(from); | |
2039 | dout(10) << "got remote wrlock on " << *lock << " on " << *lock->get_parent() << dendl; | |
2040 | mdr->remote_wrlocks[lock] = from; | |
2041 | mdr->locks.insert(lock); | |
2042 | mdr->finish_locking(lock); | |
2043 | ||
2044 | assert(mdr->more()->waiting_on_slave.count(from)); | |
2045 | mdr->more()->waiting_on_slave.erase(from); | |
2046 | assert(mdr->more()->waiting_on_slave.empty()); | |
2047 | mdcache->dispatch_request(mdr); | |
2048 | } | |
2049 | break; | |
2050 | ||
2051 | case MMDSSlaveRequest::OP_AUTHPINACK: | |
2052 | handle_slave_auth_pin_ack(mdr, m); | |
2053 | break; | |
2054 | ||
2055 | case MMDSSlaveRequest::OP_LINKPREPACK: | |
2056 | handle_slave_link_prep_ack(mdr, m); | |
2057 | break; | |
2058 | ||
2059 | case MMDSSlaveRequest::OP_RMDIRPREPACK: | |
2060 | handle_slave_rmdir_prep_ack(mdr, m); | |
2061 | break; | |
2062 | ||
2063 | case MMDSSlaveRequest::OP_RENAMEPREPACK: | |
2064 | handle_slave_rename_prep_ack(mdr, m); | |
2065 | break; | |
2066 | ||
2067 | case MMDSSlaveRequest::OP_RENAMENOTIFYACK: | |
2068 | handle_slave_rename_notify_ack(mdr, m); | |
2069 | break; | |
2070 | ||
2071 | default: | |
2072 | ceph_abort(); | |
2073 | } | |
2074 | ||
2075 | // done with reply. | |
2076 | m->put(); | |
2077 | } | |
2078 | ||
2079 | /* This function DOES put the mdr->slave_request before returning*/ | |
2080 | void Server::dispatch_slave_request(MDRequestRef& mdr) | |
2081 | { | |
2082 | dout(7) << "dispatch_slave_request " << *mdr << " " << *mdr->slave_request << dendl; | |
2083 | ||
2084 | if (mdr->aborted) { | |
2085 | dout(7) << " abort flag set, finishing" << dendl; | |
2086 | mdcache->request_finish(mdr); | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | if (logger) logger->inc(l_mdss_dispatch_slave_request); | |
2091 | ||
2092 | int op = mdr->slave_request->get_op(); | |
2093 | switch (op) { | |
2094 | case MMDSSlaveRequest::OP_XLOCK: | |
2095 | case MMDSSlaveRequest::OP_WRLOCK: | |
2096 | { | |
2097 | // identify object | |
2098 | SimpleLock *lock = mds->locker->get_lock(mdr->slave_request->get_lock_type(), | |
2099 | mdr->slave_request->get_object_info()); | |
2100 | ||
2101 | if (!lock) { | |
2102 | dout(10) << "don't have object, dropping" << dendl; | |
2103 | ceph_abort(); // can this happen, if we auth pinned properly. | |
2104 | } | |
2105 | if (op == MMDSSlaveRequest::OP_XLOCK && !lock->get_parent()->is_auth()) { | |
2106 | dout(10) << "not auth for remote xlock attempt, dropping on " | |
2107 | << *lock << " on " << *lock->get_parent() << dendl; | |
2108 | } else { | |
2109 | // use acquire_locks so that we get auth_pinning. | |
2110 | set<SimpleLock*> rdlocks; | |
2111 | set<SimpleLock*> wrlocks = mdr->wrlocks; | |
2112 | set<SimpleLock*> xlocks = mdr->xlocks; | |
2113 | ||
2114 | int replycode = 0; | |
2115 | switch (op) { | |
2116 | case MMDSSlaveRequest::OP_XLOCK: | |
2117 | xlocks.insert(lock); | |
2118 | replycode = MMDSSlaveRequest::OP_XLOCKACK; | |
2119 | break; | |
2120 | case MMDSSlaveRequest::OP_WRLOCK: | |
2121 | wrlocks.insert(lock); | |
2122 | replycode = MMDSSlaveRequest::OP_WRLOCKACK; | |
2123 | break; | |
2124 | } | |
2125 | ||
2126 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
2127 | return; | |
2128 | ||
2129 | // ack | |
2130 | MMDSSlaveRequest *r = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, replycode); | |
2131 | r->set_lock_type(lock->get_type()); | |
2132 | lock->get_parent()->set_object_info(r->get_object_info()); | |
2133 | mds->send_message(r, mdr->slave_request->get_connection()); | |
2134 | } | |
2135 | ||
2136 | // done. | |
2137 | mdr->slave_request->put(); | |
2138 | mdr->slave_request = 0; | |
2139 | } | |
2140 | break; | |
2141 | ||
2142 | case MMDSSlaveRequest::OP_UNXLOCK: | |
2143 | case MMDSSlaveRequest::OP_UNWRLOCK: | |
2144 | { | |
2145 | SimpleLock *lock = mds->locker->get_lock(mdr->slave_request->get_lock_type(), | |
2146 | mdr->slave_request->get_object_info()); | |
2147 | assert(lock); | |
2148 | bool need_issue = false; | |
2149 | switch (op) { | |
2150 | case MMDSSlaveRequest::OP_UNXLOCK: | |
2151 | mds->locker->xlock_finish(lock, mdr.get(), &need_issue); | |
2152 | break; | |
2153 | case MMDSSlaveRequest::OP_UNWRLOCK: | |
2154 | mds->locker->wrlock_finish(lock, mdr.get(), &need_issue); | |
2155 | break; | |
2156 | } | |
2157 | if (need_issue) | |
2158 | mds->locker->issue_caps(static_cast<CInode*>(lock->get_parent())); | |
2159 | ||
2160 | // done. no ack necessary. | |
2161 | mdr->slave_request->put(); | |
2162 | mdr->slave_request = 0; | |
2163 | } | |
2164 | break; | |
2165 | ||
2166 | case MMDSSlaveRequest::OP_DROPLOCKS: | |
2167 | mds->locker->drop_locks(mdr.get()); | |
2168 | mdr->slave_request->put(); | |
2169 | mdr->slave_request = 0; | |
2170 | break; | |
2171 | ||
2172 | case MMDSSlaveRequest::OP_AUTHPIN: | |
2173 | handle_slave_auth_pin(mdr); | |
2174 | break; | |
2175 | ||
2176 | case MMDSSlaveRequest::OP_LINKPREP: | |
2177 | case MMDSSlaveRequest::OP_UNLINKPREP: | |
2178 | handle_slave_link_prep(mdr); | |
2179 | break; | |
2180 | ||
2181 | case MMDSSlaveRequest::OP_RMDIRPREP: | |
2182 | handle_slave_rmdir_prep(mdr); | |
2183 | break; | |
2184 | ||
2185 | case MMDSSlaveRequest::OP_RENAMEPREP: | |
2186 | handle_slave_rename_prep(mdr); | |
2187 | break; | |
2188 | ||
2189 | case MMDSSlaveRequest::OP_FINISH: | |
2190 | // information about rename imported caps | |
2191 | if (mdr->slave_request->inode_export.length() > 0) | |
2192 | mdr->more()->inode_import.claim(mdr->slave_request->inode_export); | |
2193 | // finish off request. | |
2194 | mdcache->request_finish(mdr); | |
2195 | break; | |
2196 | ||
2197 | default: | |
2198 | ceph_abort(); | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | /* This function DOES put the mdr->slave_request before returning*/ | |
2203 | void Server::handle_slave_auth_pin(MDRequestRef& mdr) | |
2204 | { | |
2205 | dout(10) << "handle_slave_auth_pin " << *mdr << dendl; | |
2206 | ||
2207 | // build list of objects | |
2208 | list<MDSCacheObject*> objects; | |
2209 | CInode *auth_pin_freeze = NULL; | |
2210 | bool fail = false, wouldblock = false, readonly = false; | |
2211 | ||
2212 | if (mdcache->is_readonly()) { | |
2213 | dout(10) << " read-only FS" << dendl; | |
2214 | readonly = true; | |
2215 | fail = true; | |
2216 | } | |
2217 | ||
2218 | if (!fail) { | |
2219 | for (vector<MDSCacheObjectInfo>::iterator p = mdr->slave_request->get_authpins().begin(); | |
2220 | p != mdr->slave_request->get_authpins().end(); | |
2221 | ++p) { | |
2222 | MDSCacheObject *object = mdcache->get_object(*p); | |
2223 | if (!object) { | |
2224 | dout(10) << " don't have " << *p << dendl; | |
2225 | fail = true; | |
2226 | break; | |
2227 | } | |
2228 | ||
2229 | objects.push_back(object); | |
2230 | if (*p == mdr->slave_request->get_authpin_freeze()) | |
2231 | auth_pin_freeze = static_cast<CInode*>(object); | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | // can we auth pin them? | |
2236 | if (!fail) { | |
2237 | for (list<MDSCacheObject*>::iterator p = objects.begin(); | |
2238 | p != objects.end(); | |
2239 | ++p) { | |
2240 | if (!(*p)->is_auth()) { | |
2241 | dout(10) << " not auth for " << **p << dendl; | |
2242 | fail = true; | |
2243 | break; | |
2244 | } | |
2245 | if (mdr->is_auth_pinned(*p)) | |
2246 | continue; | |
2247 | if (!mdr->can_auth_pin(*p)) { | |
2248 | if (mdr->slave_request->is_nonblock()) { | |
2249 | dout(10) << " can't auth_pin (freezing?) " << **p << " nonblocking" << dendl; | |
2250 | fail = true; | |
2251 | wouldblock = true; | |
2252 | break; | |
2253 | } | |
2254 | // wait | |
2255 | dout(10) << " waiting for authpinnable on " << **p << dendl; | |
2256 | (*p)->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); | |
2257 | mdr->drop_local_auth_pins(); | |
2258 | ||
224ce89b | 2259 | mds->locker->notify_freeze_waiter(*p); |
7c673cae FG |
2260 | return; |
2261 | } | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | // auth pin! | |
2266 | if (fail) { | |
2267 | mdr->drop_local_auth_pins(); // just in case | |
2268 | } else { | |
2269 | /* freeze authpin wrong inode */ | |
2270 | if (mdr->has_more() && mdr->more()->is_freeze_authpin && | |
2271 | mdr->more()->rename_inode != auth_pin_freeze) | |
2272 | mdr->unfreeze_auth_pin(true); | |
2273 | ||
2274 | /* handle_slave_rename_prep() call freeze_inode() to wait for all other operations | |
2275 | * on the source inode to complete. This happens after all locks for the rename | |
2276 | * operation are acquired. But to acquire locks, we need auth pin locks' parent | |
2277 | * objects first. So there is an ABBA deadlock if someone auth pins the source inode | |
2278 | * after locks are acquired and before Server::handle_slave_rename_prep() is called. | |
2279 | * The solution is freeze the inode and prevent other MDRequests from getting new | |
2280 | * auth pins. | |
2281 | */ | |
2282 | if (auth_pin_freeze) { | |
2283 | dout(10) << " freezing auth pin on " << *auth_pin_freeze << dendl; | |
2284 | if (!mdr->freeze_auth_pin(auth_pin_freeze)) { | |
2285 | auth_pin_freeze->add_waiter(CInode::WAIT_FROZEN, new C_MDS_RetryRequest(mdcache, mdr)); | |
2286 | mds->mdlog->flush(); | |
2287 | return; | |
2288 | } | |
2289 | } | |
2290 | for (list<MDSCacheObject*>::iterator p = objects.begin(); | |
2291 | p != objects.end(); | |
2292 | ++p) { | |
2293 | dout(10) << "auth_pinning " << **p << dendl; | |
2294 | mdr->auth_pin(*p); | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | // ack! | |
2299 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_AUTHPINACK); | |
2300 | ||
2301 | // return list of my auth_pins (if any) | |
2302 | for (set<MDSCacheObject*>::iterator p = mdr->auth_pins.begin(); | |
2303 | p != mdr->auth_pins.end(); | |
2304 | ++p) { | |
2305 | MDSCacheObjectInfo info; | |
2306 | (*p)->set_object_info(info); | |
2307 | reply->get_authpins().push_back(info); | |
2308 | if (*p == (MDSCacheObject*)auth_pin_freeze) | |
2309 | auth_pin_freeze->set_object_info(reply->get_authpin_freeze()); | |
2310 | } | |
2311 | ||
2312 | if (wouldblock) | |
2313 | reply->mark_error_wouldblock(); | |
2314 | if (readonly) | |
2315 | reply->mark_error_rofs(); | |
2316 | ||
2317 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
2318 | ||
2319 | // clean up this request | |
2320 | mdr->slave_request->put(); | |
2321 | mdr->slave_request = 0; | |
2322 | return; | |
2323 | } | |
2324 | ||
2325 | /* This function DOES NOT put the passed ack before returning*/ | |
2326 | void Server::handle_slave_auth_pin_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack) | |
2327 | { | |
2328 | dout(10) << "handle_slave_auth_pin_ack on " << *mdr << " " << *ack << dendl; | |
2329 | mds_rank_t from = mds_rank_t(ack->get_source().num()); | |
2330 | ||
2331 | // added auth pins? | |
2332 | set<MDSCacheObject*> pinned; | |
2333 | for (vector<MDSCacheObjectInfo>::iterator p = ack->get_authpins().begin(); | |
2334 | p != ack->get_authpins().end(); | |
2335 | ++p) { | |
2336 | MDSCacheObject *object = mdcache->get_object(*p); | |
2337 | assert(object); // we pinned it | |
2338 | dout(10) << " remote has pinned " << *object << dendl; | |
2339 | if (!mdr->is_auth_pinned(object)) | |
2340 | mdr->remote_auth_pins[object] = from; | |
2341 | if (*p == ack->get_authpin_freeze()) | |
2342 | mdr->set_remote_frozen_auth_pin(static_cast<CInode *>(object)); | |
2343 | pinned.insert(object); | |
2344 | } | |
2345 | ||
2346 | // removed frozen auth pin ? | |
2347 | if (mdr->more()->is_remote_frozen_authpin && | |
2348 | ack->get_authpin_freeze() == MDSCacheObjectInfo()) { | |
2349 | auto p = mdr->remote_auth_pins.find(mdr->more()->rename_inode); | |
2350 | assert(p != mdr->remote_auth_pins.end()); | |
2351 | if (p->second == from) { | |
2352 | mdr->more()->is_remote_frozen_authpin = false; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | // removed auth pins? | |
2357 | map<MDSCacheObject*, mds_rank_t>::iterator p = mdr->remote_auth_pins.begin(); | |
2358 | while (p != mdr->remote_auth_pins.end()) { | |
2359 | MDSCacheObject* object = p->first; | |
2360 | if (p->second == from && pinned.count(object) == 0) { | |
2361 | dout(10) << " remote has unpinned " << *object << dendl; | |
2362 | mdr->remote_auth_pins.erase(p++); | |
2363 | } else { | |
2364 | ++p; | |
2365 | } | |
2366 | } | |
2367 | ||
2368 | if (ack->is_error_rofs()) { | |
2369 | mdr->more()->slave_error = -EROFS; | |
2370 | mdr->aborted = true; | |
2371 | } else if (ack->is_error_wouldblock()) { | |
2372 | mdr->more()->slave_error = -EWOULDBLOCK; | |
2373 | mdr->aborted = true; | |
2374 | } | |
2375 | ||
2376 | // note slave | |
2377 | mdr->more()->slaves.insert(from); | |
2378 | ||
2379 | // clear from waiting list | |
2380 | assert(mdr->more()->waiting_on_slave.count(from)); | |
2381 | mdr->more()->waiting_on_slave.erase(from); | |
2382 | ||
2383 | // go again? | |
2384 | if (mdr->more()->waiting_on_slave.empty()) | |
2385 | mdcache->dispatch_request(mdr); | |
2386 | else | |
2387 | dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl; | |
2388 | } | |
2389 | ||
2390 | ||
2391 | // --------------------------------------- | |
2392 | // HELPERS | |
2393 | ||
2394 | ||
2395 | /** | |
2396 | * check whether we are permitted to complete a request | |
2397 | * | |
2398 | * Check whether we have permission to perform the operation specified | |
2399 | * by mask on the given inode, based on the capability in the mdr's | |
2400 | * session. | |
2401 | */ | |
2402 | bool Server::check_access(MDRequestRef& mdr, CInode *in, unsigned mask) | |
2403 | { | |
2404 | if (mdr->session) { | |
2405 | int r = mdr->session->check_access( | |
2406 | in, mask, | |
2407 | mdr->client_request->get_caller_uid(), | |
2408 | mdr->client_request->get_caller_gid(), | |
2409 | &mdr->client_request->get_caller_gid_list(), | |
2410 | mdr->client_request->head.args.setattr.uid, | |
2411 | mdr->client_request->head.args.setattr.gid); | |
2412 | if (r < 0) { | |
2413 | respond_to_request(mdr, r); | |
2414 | return false; | |
2415 | } | |
2416 | } | |
2417 | return true; | |
2418 | } | |
2419 | ||
2420 | /** | |
2421 | * check whether fragment has reached maximum size | |
2422 | * | |
2423 | */ | |
2424 | bool Server::check_fragment_space(MDRequestRef &mdr, CDir *in) | |
2425 | { | |
2426 | const auto size = in->get_frag_size(); | |
2427 | if (size >= g_conf->mds_bal_fragment_size_max) { | |
2428 | dout(10) << "fragment " << *in << " size exceeds " << g_conf->mds_bal_fragment_size_max << " (ENOSPC)" << dendl; | |
2429 | respond_to_request(mdr, -ENOSPC); | |
2430 | return false; | |
2431 | } | |
2432 | ||
2433 | return true; | |
2434 | } | |
2435 | ||
2436 | ||
2437 | /** validate_dentry_dir | |
2438 | * | |
2439 | * verify that the dir exists and would own the dname. | |
2440 | * do not check if the dentry exists. | |
2441 | */ | |
2442 | CDir *Server::validate_dentry_dir(MDRequestRef& mdr, CInode *diri, const string& dname) | |
2443 | { | |
2444 | // make sure parent is a dir? | |
2445 | if (!diri->is_dir()) { | |
2446 | dout(7) << "validate_dentry_dir: not a dir" << dendl; | |
2447 | respond_to_request(mdr, -ENOTDIR); | |
2448 | return NULL; | |
2449 | } | |
2450 | ||
2451 | // which dirfrag? | |
2452 | frag_t fg = diri->pick_dirfrag(dname); | |
2453 | CDir *dir = try_open_auth_dirfrag(diri, fg, mdr); | |
2454 | if (!dir) | |
2455 | return 0; | |
2456 | ||
2457 | // frozen? | |
2458 | if (dir->is_frozen()) { | |
2459 | dout(7) << "dir is frozen " << *dir << dendl; | |
2460 | dir->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); | |
2461 | return NULL; | |
2462 | } | |
2463 | ||
2464 | return dir; | |
2465 | } | |
2466 | ||
2467 | ||
2468 | /** prepare_null_dentry | |
2469 | * prepare a null (or existing) dentry in given dir. | |
2470 | * wait for any dn lock. | |
2471 | */ | |
2472 | CDentry* Server::prepare_null_dentry(MDRequestRef& mdr, CDir *dir, const string& dname, bool okexist) | |
2473 | { | |
2474 | dout(10) << "prepare_null_dentry " << dname << " in " << *dir << dendl; | |
2475 | assert(dir->is_auth()); | |
2476 | ||
2477 | client_t client = mdr->get_client(); | |
2478 | ||
2479 | // does it already exist? | |
2480 | CDentry *dn = dir->lookup(dname); | |
2481 | if (dn) { | |
2482 | /* | |
2483 | if (dn->lock.is_xlocked_by_other(mdr)) { | |
2484 | dout(10) << "waiting on xlocked dentry " << *dn << dendl; | |
2485 | dn->lock.add_waiter(SimpleLock::WAIT_RD, new C_MDS_RetryRequest(mdcache, mdr)); | |
2486 | return 0; | |
2487 | } | |
2488 | */ | |
2489 | if (!dn->get_linkage(client, mdr)->is_null()) { | |
2490 | // name already exists | |
2491 | dout(10) << "dentry " << dname << " exists in " << *dir << dendl; | |
2492 | if (!okexist) { | |
2493 | respond_to_request(mdr, -EEXIST); | |
2494 | return 0; | |
2495 | } | |
2496 | } else { | |
2497 | dn->first = dir->inode->find_snaprealm()->get_newest_seq() + 1; | |
2498 | } | |
2499 | ||
2500 | return dn; | |
2501 | } | |
2502 | ||
2503 | // make sure dir is complete | |
2504 | if (!dir->is_complete() && (!dir->has_bloom() || dir->is_in_bloom(dname))) { | |
2505 | dout(7) << " incomplete dir contents for " << *dir << ", fetching" << dendl; | |
2506 | dir->fetch(new C_MDS_RetryRequest(mdcache, mdr)); | |
2507 | return 0; | |
2508 | } | |
2509 | ||
2510 | // create | |
2511 | dn = dir->add_null_dentry(dname, dir->inode->find_snaprealm()->get_newest_seq() + 1); | |
2512 | dn->mark_new(); | |
2513 | dout(10) << "prepare_null_dentry added " << *dn << dendl; | |
2514 | return dn; | |
2515 | } | |
2516 | ||
2517 | CDentry* Server::prepare_stray_dentry(MDRequestRef& mdr, CInode *in) | |
2518 | { | |
2519 | CDentry *straydn = mdr->straydn; | |
2520 | if (straydn) { | |
2521 | string straydname; | |
2522 | in->name_stray_dentry(straydname); | |
2523 | if (straydn->get_name() == straydname) | |
2524 | return straydn; | |
2525 | ||
2526 | assert(!mdr->done_locking); | |
2527 | mdr->unpin(straydn); | |
2528 | } | |
2529 | ||
2530 | CDir *straydir = mdcache->get_stray_dir(in); | |
2531 | ||
2532 | if (!mdr->client_request->is_replay() && | |
2533 | !check_fragment_space(mdr, straydir)) | |
2534 | return NULL; | |
2535 | ||
2536 | straydn = mdcache->get_or_create_stray_dentry(in); | |
2537 | mdr->straydn = straydn; | |
2538 | mdr->pin(straydn); | |
2539 | return straydn; | |
2540 | } | |
2541 | ||
2542 | /** prepare_new_inode | |
2543 | * | |
2544 | * create a new inode. set c/m/atime. hit dir pop. | |
2545 | */ | |
2546 | CInode* Server::prepare_new_inode(MDRequestRef& mdr, CDir *dir, inodeno_t useino, unsigned mode, | |
2547 | file_layout_t *layout) | |
2548 | { | |
2549 | CInode *in = new CInode(mdcache); | |
2550 | ||
2551 | // Server::prepare_force_open_sessions() can re-open session in closing | |
2552 | // state. In that corner case, session's prealloc_inos are being freed. | |
2553 | // To simplify the code, we disallow using/refilling session's prealloc_ino | |
2554 | // while session is opening. | |
2555 | bool allow_prealloc_inos = !mdr->session->is_opening(); | |
2556 | ||
2557 | // assign ino | |
2558 | if (allow_prealloc_inos && | |
2559 | mdr->session->info.prealloc_inos.size()) { | |
2560 | mdr->used_prealloc_ino = | |
2561 | in->inode.ino = mdr->session->take_ino(useino); // prealloc -> used | |
2562 | mds->sessionmap.mark_projected(mdr->session); | |
2563 | ||
2564 | dout(10) << "prepare_new_inode used_prealloc " << mdr->used_prealloc_ino | |
2565 | << " (" << mdr->session->info.prealloc_inos | |
2566 | << ", " << mdr->session->info.prealloc_inos.size() << " left)" | |
2567 | << dendl; | |
2568 | } else { | |
2569 | mdr->alloc_ino = | |
2570 | in->inode.ino = mds->inotable->project_alloc_id(); | |
2571 | dout(10) << "prepare_new_inode alloc " << mdr->alloc_ino << dendl; | |
2572 | } | |
2573 | ||
2574 | if (useino && useino != in->inode.ino) { | |
2575 | dout(0) << "WARNING: client specified " << useino << " and i allocated " << in->inode.ino << dendl; | |
2576 | mds->clog->error() << mdr->client_request->get_source() | |
2577 | << " specified ino " << useino | |
2578 | << " but mds." << mds->get_nodeid() << " allocated " << in->inode.ino; | |
2579 | //ceph_abort(); // just for now. | |
2580 | } | |
2581 | ||
2582 | if (allow_prealloc_inos && | |
2583 | mdr->session->get_num_projected_prealloc_inos() < g_conf->mds_client_prealloc_inos / 2) { | |
2584 | int need = g_conf->mds_client_prealloc_inos - mdr->session->get_num_projected_prealloc_inos(); | |
2585 | mds->inotable->project_alloc_ids(mdr->prealloc_inos, need); | |
2586 | assert(mdr->prealloc_inos.size()); // or else fix projected increment semantics | |
2587 | mdr->session->pending_prealloc_inos.insert(mdr->prealloc_inos); | |
2588 | mds->sessionmap.mark_projected(mdr->session); | |
2589 | dout(10) << "prepare_new_inode prealloc " << mdr->prealloc_inos << dendl; | |
2590 | } | |
2591 | ||
2592 | in->inode.version = 1; | |
2593 | in->inode.xattr_version = 1; | |
2594 | in->inode.nlink = 1; // FIXME | |
2595 | ||
2596 | in->inode.mode = mode; | |
2597 | ||
2598 | memset(&in->inode.dir_layout, 0, sizeof(in->inode.dir_layout)); | |
2599 | if (in->inode.is_dir()) { | |
2600 | in->inode.dir_layout.dl_dir_hash = g_conf->mds_default_dir_hash; | |
2601 | } else if (layout) { | |
2602 | in->inode.layout = *layout; | |
2603 | } else { | |
2604 | in->inode.layout = mdcache->default_file_layout; | |
2605 | } | |
2606 | ||
2607 | in->inode.truncate_size = -1ull; // not truncated, yet! | |
2608 | in->inode.truncate_seq = 1; /* starting with 1, 0 is kept for no-truncation logic */ | |
2609 | ||
2610 | CInode *diri = dir->get_inode(); | |
2611 | ||
2612 | dout(10) << oct << " dir mode 0" << diri->inode.mode << " new mode 0" << mode << dec << dendl; | |
2613 | ||
2614 | if (diri->inode.mode & S_ISGID) { | |
2615 | dout(10) << " dir is sticky" << dendl; | |
2616 | in->inode.gid = diri->inode.gid; | |
2617 | if (S_ISDIR(mode)) { | |
2618 | dout(10) << " new dir also sticky" << dendl; | |
2619 | in->inode.mode |= S_ISGID; | |
2620 | } | |
2621 | } else | |
2622 | in->inode.gid = mdr->client_request->get_caller_gid(); | |
2623 | ||
2624 | in->inode.uid = mdr->client_request->get_caller_uid(); | |
2625 | ||
2626 | in->inode.btime = in->inode.ctime = in->inode.mtime = in->inode.atime = | |
2627 | mdr->get_op_stamp(); | |
2628 | ||
2629 | in->inode.change_attr = 0; | |
2630 | ||
2631 | MClientRequest *req = mdr->client_request; | |
2632 | if (req->get_data().length()) { | |
2633 | bufferlist::iterator p = req->get_data().begin(); | |
2634 | ||
2635 | // xattrs on new inode? | |
2636 | map<string,bufferptr> xattrs; | |
2637 | ::decode(xattrs, p); | |
2638 | for (map<string,bufferptr>::iterator p = xattrs.begin(); p != xattrs.end(); ++p) { | |
2639 | dout(10) << "prepare_new_inode setting xattr " << p->first << dendl; | |
2640 | in->xattrs[p->first] = p->second; | |
2641 | } | |
2642 | } | |
2643 | ||
2644 | if (!mds->mdsmap->get_inline_data_enabled() || | |
2645 | !mdr->session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA)) | |
2646 | in->inode.inline_data.version = CEPH_INLINE_NONE; | |
2647 | ||
2648 | mdcache->add_inode(in); // add | |
2649 | dout(10) << "prepare_new_inode " << *in << dendl; | |
2650 | return in; | |
2651 | } | |
2652 | ||
2653 | void Server::journal_allocated_inos(MDRequestRef& mdr, EMetaBlob *blob) | |
2654 | { | |
2655 | dout(20) << "journal_allocated_inos sessionmapv " << mds->sessionmap.get_projected() | |
2656 | << " inotablev " << mds->inotable->get_projected_version() | |
2657 | << dendl; | |
2658 | blob->set_ino_alloc(mdr->alloc_ino, | |
2659 | mdr->used_prealloc_ino, | |
2660 | mdr->prealloc_inos, | |
2661 | mdr->client_request->get_source(), | |
2662 | mds->sessionmap.get_projected(), | |
2663 | mds->inotable->get_projected_version()); | |
2664 | } | |
2665 | ||
2666 | void Server::apply_allocated_inos(MDRequestRef& mdr, Session *session) | |
2667 | { | |
2668 | dout(10) << "apply_allocated_inos " << mdr->alloc_ino | |
2669 | << " / " << mdr->prealloc_inos | |
2670 | << " / " << mdr->used_prealloc_ino << dendl; | |
2671 | ||
2672 | if (mdr->alloc_ino) { | |
2673 | mds->inotable->apply_alloc_id(mdr->alloc_ino); | |
2674 | } | |
2675 | if (mdr->prealloc_inos.size()) { | |
2676 | assert(session); | |
2677 | session->pending_prealloc_inos.subtract(mdr->prealloc_inos); | |
2678 | session->info.prealloc_inos.insert(mdr->prealloc_inos); | |
2679 | mds->sessionmap.mark_dirty(session); | |
2680 | mds->inotable->apply_alloc_ids(mdr->prealloc_inos); | |
2681 | } | |
2682 | if (mdr->used_prealloc_ino) { | |
2683 | assert(session); | |
2684 | session->info.used_inos.erase(mdr->used_prealloc_ino); | |
2685 | mds->sessionmap.mark_dirty(session); | |
2686 | } | |
2687 | } | |
2688 | ||
2689 | class C_MDS_TryFindInode : public ServerContext { | |
2690 | MDRequestRef mdr; | |
2691 | public: | |
2692 | C_MDS_TryFindInode(Server *s, MDRequestRef& r) : ServerContext(s), mdr(r) {} | |
2693 | void finish(int r) override { | |
2694 | if (r == -ESTALE) // :( find_ino_peers failed | |
2695 | server->respond_to_request(mdr, r); | |
2696 | else | |
2697 | server->dispatch_client_request(mdr); | |
2698 | } | |
2699 | }; | |
2700 | ||
2701 | CDir *Server::traverse_to_auth_dir(MDRequestRef& mdr, vector<CDentry*> &trace, filepath refpath) | |
2702 | { | |
2703 | // figure parent dir vs dname | |
2704 | if (refpath.depth() == 0) { | |
2705 | dout(7) << "can't do that to root" << dendl; | |
2706 | respond_to_request(mdr, -EINVAL); | |
2707 | return 0; | |
2708 | } | |
2709 | string dname = refpath.last_dentry(); | |
2710 | refpath.pop_dentry(); | |
2711 | ||
2712 | dout(10) << "traverse_to_auth_dir dirpath " << refpath << " dname " << dname << dendl; | |
2713 | ||
2714 | // traverse to parent dir | |
2715 | CInode *diri; | |
2716 | int r = mdcache->path_traverse(mdr, NULL, NULL, refpath, &trace, &diri, MDS_TRAVERSE_FORWARD); | |
2717 | if (r > 0) return 0; // delayed | |
2718 | if (r < 0) { | |
2719 | if (r == -ESTALE) { | |
2720 | dout(10) << "FAIL on ESTALE but attempting recovery" << dendl; | |
2721 | mdcache->find_ino_peers(refpath.get_ino(), new C_MDS_TryFindInode(this, mdr)); | |
2722 | return 0; | |
2723 | } | |
2724 | respond_to_request(mdr, r); | |
2725 | return 0; | |
2726 | } | |
2727 | ||
2728 | // is it an auth dir? | |
2729 | CDir *dir = validate_dentry_dir(mdr, diri, dname); | |
2730 | if (!dir) | |
2731 | return 0; // forwarded or waiting for freeze | |
2732 | ||
2733 | dout(10) << "traverse_to_auth_dir " << *dir << dendl; | |
2734 | return dir; | |
2735 | } | |
2736 | ||
2737 | /* If this returns null, the request has been handled | |
2738 | * as appropriate: forwarded on, or the client's been replied to */ | |
2739 | CInode* Server::rdlock_path_pin_ref(MDRequestRef& mdr, int n, | |
2740 | set<SimpleLock*> &rdlocks, | |
2741 | bool want_auth, | |
2742 | bool no_want_auth, /* for readdir, who doesn't want auth _even_if_ it's | |
2743 | a snapped dir */ | |
2744 | file_layout_t **layout, | |
2745 | bool no_lookup) // true if we cannot return a null dentry lease | |
2746 | { | |
2747 | const filepath& refpath = n ? mdr->get_filepath2() : mdr->get_filepath(); | |
2748 | dout(10) << "rdlock_path_pin_ref " << *mdr << " " << refpath << dendl; | |
2749 | ||
2750 | if (mdr->done_locking) | |
2751 | return mdr->in[n]; | |
2752 | ||
2753 | // traverse | |
2754 | int r = mdcache->path_traverse(mdr, NULL, NULL, refpath, &mdr->dn[n], &mdr->in[n], MDS_TRAVERSE_FORWARD); | |
2755 | if (r > 0) | |
2756 | return NULL; // delayed | |
2757 | if (r < 0) { // error | |
2758 | if (r == -ENOENT && n == 0 && mdr->dn[n].size()) { | |
2759 | if (!no_lookup) | |
2760 | mdr->tracedn = mdr->dn[n][mdr->dn[n].size()-1]; | |
2761 | respond_to_request(mdr, r); | |
2762 | } else if (r == -ESTALE) { | |
2763 | dout(10) << "FAIL on ESTALE but attempting recovery" << dendl; | |
2764 | MDSInternalContextBase *c = new C_MDS_TryFindInode(this, mdr); | |
2765 | mdcache->find_ino_peers(refpath.get_ino(), c); | |
2766 | } else { | |
2767 | dout(10) << "FAIL on error " << r << dendl; | |
2768 | respond_to_request(mdr, r); | |
2769 | } | |
2770 | return 0; | |
2771 | } | |
2772 | CInode *ref = mdr->in[n]; | |
2773 | dout(10) << "ref is " << *ref << dendl; | |
2774 | ||
2775 | // fw to inode auth? | |
2776 | if (mdr->snapid != CEPH_NOSNAP && !no_want_auth) | |
2777 | want_auth = true; | |
2778 | ||
2779 | if (want_auth) { | |
2780 | if (ref->is_ambiguous_auth()) { | |
2781 | dout(10) << "waiting for single auth on " << *ref << dendl; | |
2782 | ref->add_waiter(CInode::WAIT_SINGLEAUTH, new C_MDS_RetryRequest(mdcache, mdr)); | |
2783 | return 0; | |
2784 | } | |
2785 | if (!ref->is_auth()) { | |
2786 | dout(10) << "fw to auth for " << *ref << dendl; | |
2787 | mdcache->request_forward(mdr, ref->authority().first); | |
2788 | return 0; | |
2789 | } | |
2790 | ||
2791 | // auth_pin? | |
2792 | // do NOT proceed if freezing, as cap release may defer in that case, and | |
2793 | // we could deadlock when we try to lock @ref. | |
2794 | // if we're already auth_pinned, continue; the release has already been processed. | |
2795 | if (ref->is_frozen() || ref->is_frozen_auth_pin() || | |
2796 | (ref->is_freezing() && !mdr->is_auth_pinned(ref))) { | |
2797 | dout(7) << "waiting for !frozen/authpinnable on " << *ref << dendl; | |
2798 | ref->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); | |
2799 | /* If we have any auth pins, this will deadlock. | |
2800 | * But the only way to get here if we've already got auth pins | |
2801 | * is because we're on an inode with snapshots that got updated | |
2802 | * between dispatches of this request. So we're going to drop | |
2803 | * our locks and our auth pins and reacquire them later. | |
2804 | * | |
2805 | * This is safe since we're only in this function when working on | |
2806 | * a single MDS request; otherwise we'd be in | |
2807 | * rdlock_path_xlock_dentry. | |
2808 | */ | |
2809 | mds->locker->drop_locks(mdr.get(), NULL); | |
2810 | mdr->drop_local_auth_pins(); | |
224ce89b WB |
2811 | if (!mdr->remote_auth_pins.empty()) |
2812 | mds->locker->notify_freeze_waiter(ref); | |
7c673cae FG |
2813 | return 0; |
2814 | } | |
2815 | ||
2816 | mdr->auth_pin(ref); | |
2817 | } | |
2818 | ||
2819 | for (int i=0; i<(int)mdr->dn[n].size(); i++) | |
2820 | rdlocks.insert(&mdr->dn[n][i]->lock); | |
2821 | if (layout) | |
2822 | mds->locker->include_snap_rdlocks_wlayout(rdlocks, ref, layout); | |
2823 | else | |
2824 | mds->locker->include_snap_rdlocks(rdlocks, ref); | |
2825 | ||
2826 | // set and pin ref | |
2827 | mdr->pin(ref); | |
2828 | return ref; | |
2829 | } | |
2830 | ||
2831 | ||
2832 | /** rdlock_path_xlock_dentry | |
2833 | * traverse path to the directory that could/would contain dentry. | |
2834 | * make sure i am auth for that dentry, forward as necessary. | |
2835 | * create null dentry in place (or use existing if okexist). | |
2836 | * get rdlocks on traversed dentries, xlock on new dentry. | |
2837 | */ | |
2838 | CDentry* Server::rdlock_path_xlock_dentry(MDRequestRef& mdr, int n, | |
2839 | set<SimpleLock*>& rdlocks, set<SimpleLock*>& wrlocks, set<SimpleLock*>& xlocks, | |
2840 | bool okexist, bool mustexist, bool alwaysxlock, | |
2841 | file_layout_t **layout) | |
2842 | { | |
2843 | const filepath& refpath = n ? mdr->get_filepath2() : mdr->get_filepath(); | |
2844 | ||
2845 | dout(10) << "rdlock_path_xlock_dentry " << *mdr << " " << refpath << dendl; | |
2846 | ||
2847 | client_t client = mdr->get_client(); | |
2848 | ||
2849 | if (mdr->done_locking) | |
2850 | return mdr->dn[n].back(); | |
2851 | ||
2852 | CDir *dir = traverse_to_auth_dir(mdr, mdr->dn[n], refpath); | |
2853 | if (!dir) return 0; | |
2854 | dout(10) << "rdlock_path_xlock_dentry dir " << *dir << dendl; | |
2855 | ||
7c673cae FG |
2856 | CInode *diri = dir->get_inode(); |
2857 | if (!mdr->reqid.name.is_mds()) { | |
2858 | if (diri->is_system() && !diri->is_root()) { | |
2859 | respond_to_request(mdr, -EROFS); | |
2860 | return 0; | |
2861 | } | |
2862 | } | |
2863 | if (!diri->is_base() && diri->get_projected_parent_dir()->inode->is_stray()) { | |
2864 | respond_to_request(mdr, -ENOENT); | |
2865 | return 0; | |
2866 | } | |
2867 | ||
2868 | // make a null dentry? | |
2869 | const string &dname = refpath.last_dentry(); | |
2870 | CDentry *dn; | |
2871 | if (mustexist) { | |
2872 | dn = dir->lookup(dname); | |
2873 | ||
2874 | // make sure dir is complete | |
2875 | if (!dn && !dir->is_complete() && | |
2876 | (!dir->has_bloom() || dir->is_in_bloom(dname))) { | |
2877 | dout(7) << " incomplete dir contents for " << *dir << ", fetching" << dendl; | |
2878 | dir->fetch(new C_MDS_RetryRequest(mdcache, mdr)); | |
2879 | return 0; | |
2880 | } | |
2881 | ||
2882 | // readable? | |
2883 | if (dn && !dn->lock.can_read(client) && dn->lock.get_xlock_by() != mdr) { | |
2884 | dout(10) << "waiting on xlocked dentry " << *dn << dendl; | |
2885 | dn->lock.add_waiter(SimpleLock::WAIT_RD, new C_MDS_RetryRequest(mdcache, mdr)); | |
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | // exists? | |
2890 | if (!dn || dn->get_linkage(client, mdr)->is_null()) { | |
2891 | dout(7) << "dentry " << dname << " dne in " << *dir << dendl; | |
2892 | respond_to_request(mdr, -ENOENT); | |
2893 | return 0; | |
2894 | } | |
2895 | } else { | |
2896 | dn = prepare_null_dentry(mdr, dir, dname, okexist); | |
2897 | if (!dn) | |
2898 | return 0; | |
2899 | } | |
2900 | ||
2901 | mdr->dn[n].push_back(dn); | |
2902 | CDentry::linkage_t *dnl = dn->get_linkage(client, mdr); | |
2903 | mdr->in[n] = dnl->get_inode(); | |
2904 | ||
2905 | // -- lock -- | |
2906 | // NOTE: rename takes the same set of locks for srcdn | |
2907 | for (int i=0; i<(int)mdr->dn[n].size(); i++) | |
2908 | rdlocks.insert(&mdr->dn[n][i]->lock); | |
2909 | if (alwaysxlock || dnl->is_null()) | |
2910 | xlocks.insert(&dn->lock); // new dn, xlock | |
2911 | else | |
2912 | rdlocks.insert(&dn->lock); // existing dn, rdlock | |
2913 | wrlocks.insert(&dn->get_dir()->inode->filelock); // also, wrlock on dir mtime | |
2914 | wrlocks.insert(&dn->get_dir()->inode->nestlock); // also, wrlock on dir mtime | |
2915 | if (layout) | |
2916 | mds->locker->include_snap_rdlocks_wlayout(rdlocks, dn->get_dir()->inode, layout); | |
2917 | else | |
2918 | mds->locker->include_snap_rdlocks(rdlocks, dn->get_dir()->inode); | |
2919 | ||
2920 | return dn; | |
2921 | } | |
2922 | ||
2923 | ||
2924 | ||
2925 | ||
2926 | ||
2927 | /** | |
2928 | * try_open_auth_dirfrag -- open dirfrag, or forward to dirfrag auth | |
2929 | * | |
2930 | * @param diri base inode | |
2931 | * @param fg the exact frag we want | |
2932 | * @param mdr request | |
2933 | * @returns the pointer, or NULL if it had to be delayed (but mdr is taken care of) | |
2934 | */ | |
2935 | CDir* Server::try_open_auth_dirfrag(CInode *diri, frag_t fg, MDRequestRef& mdr) | |
2936 | { | |
2937 | CDir *dir = diri->get_dirfrag(fg); | |
2938 | ||
2939 | // not open and inode not mine? | |
2940 | if (!dir && !diri->is_auth()) { | |
2941 | mds_rank_t inauth = diri->authority().first; | |
2942 | dout(7) << "try_open_auth_dirfrag: not open, not inode auth, fw to mds." << inauth << dendl; | |
2943 | mdcache->request_forward(mdr, inauth); | |
2944 | return 0; | |
2945 | } | |
2946 | ||
2947 | // not open and inode frozen? | |
2948 | if (!dir && diri->is_frozen()) { | |
2949 | dout(10) << "try_open_auth_dirfrag: dir inode is frozen, waiting " << *diri << dendl; | |
2950 | assert(diri->get_parent_dir()); | |
224ce89b | 2951 | diri->add_waiter(CInode::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); |
7c673cae FG |
2952 | return 0; |
2953 | } | |
2954 | ||
2955 | // invent? | |
2956 | if (!dir) | |
2957 | dir = diri->get_or_open_dirfrag(mdcache, fg); | |
2958 | ||
2959 | // am i auth for the dirfrag? | |
2960 | if (!dir->is_auth()) { | |
2961 | mds_rank_t auth = dir->authority().first; | |
2962 | dout(7) << "try_open_auth_dirfrag: not auth for " << *dir | |
2963 | << ", fw to mds." << auth << dendl; | |
2964 | mdcache->request_forward(mdr, auth); | |
2965 | return 0; | |
2966 | } | |
2967 | ||
2968 | return dir; | |
2969 | } | |
2970 | ||
2971 | ||
2972 | // =============================================================================== | |
2973 | // STAT | |
2974 | ||
2975 | void Server::handle_client_getattr(MDRequestRef& mdr, bool is_lookup) | |
2976 | { | |
2977 | MClientRequest *req = mdr->client_request; | |
2978 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
2979 | ||
2980 | if (req->get_filepath().depth() == 0 && is_lookup) { | |
2981 | // refpath can't be empty for lookup but it can for | |
2982 | // getattr (we do getattr with empty refpath for mount of '/') | |
2983 | respond_to_request(mdr, -EINVAL); | |
2984 | return; | |
2985 | } | |
2986 | ||
2987 | CInode *ref = rdlock_path_pin_ref(mdr, 0, rdlocks, false, false, NULL, !is_lookup); | |
2988 | if (!ref) return; | |
2989 | ||
2990 | /* | |
2991 | * if client currently holds the EXCL cap on a field, do not rdlock | |
2992 | * it; client's stat() will result in valid info if _either_ EXCL | |
2993 | * cap is held or MDS rdlocks and reads the value here. | |
2994 | * | |
2995 | * handling this case here is easier than weakening rdlock | |
2996 | * semantics... that would cause problems elsewhere. | |
2997 | */ | |
2998 | client_t client = mdr->get_client(); | |
2999 | int issued = 0; | |
3000 | Capability *cap = ref->get_client_cap(client); | |
3001 | if (cap && (mdr->snapid == CEPH_NOSNAP || | |
3002 | mdr->snapid <= cap->client_follows)) | |
3003 | issued = cap->issued(); | |
3004 | ||
3005 | int mask = req->head.args.getattr.mask; | |
3006 | if ((mask & CEPH_CAP_LINK_SHARED) && (issued & CEPH_CAP_LINK_EXCL) == 0) rdlocks.insert(&ref->linklock); | |
3007 | if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0) rdlocks.insert(&ref->authlock); | |
3008 | if ((mask & CEPH_CAP_FILE_SHARED) && (issued & CEPH_CAP_FILE_EXCL) == 0) rdlocks.insert(&ref->filelock); | |
3009 | if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0) rdlocks.insert(&ref->xattrlock); | |
3010 | ||
3011 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3012 | return; | |
3013 | ||
3014 | if (!check_access(mdr, ref, MAY_READ)) | |
3015 | return; | |
3016 | ||
3017 | // note which caps are requested, so we return at least a snapshot | |
3018 | // value for them. (currently this matters for xattrs and inline data) | |
3019 | mdr->getattr_caps = mask; | |
3020 | ||
3021 | mds->balancer->hit_inode(ceph_clock_now(), ref, META_POP_IRD, | |
3022 | req->get_source().num()); | |
3023 | ||
3024 | // reply | |
3025 | dout(10) << "reply to stat on " << *req << dendl; | |
3026 | mdr->tracei = ref; | |
3027 | if (is_lookup) | |
3028 | mdr->tracedn = mdr->dn[0].back(); | |
3029 | respond_to_request(mdr, 0); | |
3030 | } | |
3031 | ||
3032 | struct C_MDS_LookupIno2 : public ServerContext { | |
3033 | MDRequestRef mdr; | |
3034 | C_MDS_LookupIno2(Server *s, MDRequestRef& r) : ServerContext(s), mdr(r) {} | |
3035 | void finish(int r) override { | |
3036 | server->_lookup_ino_2(mdr, r); | |
3037 | } | |
3038 | }; | |
3039 | ||
3040 | /* This function DOES clean up the mdr before returning*/ | |
3041 | /* | |
3042 | * filepath: ino | |
3043 | */ | |
3044 | void Server::handle_client_lookup_ino(MDRequestRef& mdr, | |
3045 | bool want_parent, bool want_dentry) | |
3046 | { | |
3047 | MClientRequest *req = mdr->client_request; | |
3048 | ||
3049 | inodeno_t ino = req->get_filepath().get_ino(); | |
3050 | CInode *in = mdcache->get_inode(ino); | |
3051 | if (in && in->state_test(CInode::STATE_PURGING)) { | |
3052 | respond_to_request(mdr, -ESTALE); | |
3053 | return; | |
3054 | } | |
3055 | if (!in) { | |
3056 | mdcache->open_ino(ino, (int64_t)-1, new C_MDS_LookupIno2(this, mdr), false); | |
3057 | return; | |
3058 | } | |
3059 | ||
3060 | if (mdr && in->snaprealm && !in->snaprealm->is_open() && | |
3061 | !in->snaprealm->open_parents(new C_MDS_RetryRequest(mdcache, mdr))) { | |
3062 | return; | |
3063 | } | |
3064 | ||
3065 | // check for nothing (not read or write); this still applies the | |
3066 | // path check. | |
3067 | if (!check_access(mdr, in, 0)) | |
3068 | return; | |
3069 | ||
3070 | CDentry *dn = in->get_projected_parent_dn(); | |
3071 | CInode *diri = dn ? dn->get_dir()->inode : NULL; | |
3072 | ||
3073 | set<SimpleLock*> rdlocks; | |
3074 | if (dn && (want_parent || want_dentry)) { | |
3075 | mdr->pin(dn); | |
3076 | rdlocks.insert(&dn->lock); | |
3077 | } | |
3078 | ||
3079 | unsigned mask = req->head.args.getattr.mask; | |
3080 | if (mask) { | |
3081 | Capability *cap = in->get_client_cap(mdr->get_client()); | |
3082 | int issued = 0; | |
3083 | if (cap && (mdr->snapid == CEPH_NOSNAP || mdr->snapid <= cap->client_follows)) | |
3084 | issued = cap->issued(); | |
3085 | // permission bits, ACL/security xattrs | |
3086 | if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0) | |
3087 | rdlocks.insert(&in->authlock); | |
3088 | if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0) | |
3089 | rdlocks.insert(&in->xattrlock); | |
3090 | ||
3091 | mdr->getattr_caps = mask; | |
3092 | } | |
3093 | ||
3094 | if (!rdlocks.empty()) { | |
3095 | set<SimpleLock*> wrlocks, xlocks; | |
3096 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3097 | return; | |
3098 | ||
3099 | // need read access to directory inode | |
3100 | if (!check_access(mdr, diri, MAY_READ)) | |
3101 | return; | |
3102 | } | |
3103 | ||
3104 | if (want_parent) { | |
3105 | if (in->is_base()) { | |
3106 | respond_to_request(mdr, -EINVAL); | |
3107 | return; | |
3108 | } | |
3109 | if (!diri || diri->is_stray()) { | |
3110 | respond_to_request(mdr, -ESTALE); | |
3111 | return; | |
3112 | } | |
3113 | dout(10) << "reply to lookup_parent " << *in << dendl; | |
3114 | mdr->tracei = diri; | |
3115 | respond_to_request(mdr, 0); | |
3116 | } else { | |
3117 | if (want_dentry) { | |
3118 | inodeno_t dirino = req->get_filepath2().get_ino(); | |
3119 | if (!diri || (dirino != inodeno_t() && diri->ino() != dirino)) { | |
3120 | respond_to_request(mdr, -ENOENT); | |
3121 | return; | |
3122 | } | |
3123 | dout(10) << "reply to lookup_name " << *in << dendl; | |
3124 | } else | |
3125 | dout(10) << "reply to lookup_ino " << *in << dendl; | |
3126 | ||
3127 | mdr->tracei = in; | |
3128 | if (want_dentry) | |
3129 | mdr->tracedn = dn; | |
3130 | respond_to_request(mdr, 0); | |
3131 | } | |
3132 | } | |
3133 | ||
3134 | void Server::_lookup_ino_2(MDRequestRef& mdr, int r) | |
3135 | { | |
3136 | inodeno_t ino = mdr->client_request->get_filepath().get_ino(); | |
3137 | dout(10) << "_lookup_ino_2 " << mdr.get() << " ino " << ino << " r=" << r << dendl; | |
3138 | ||
3139 | // `r` is a rank if >=0, else an error code | |
3140 | if (r >= 0) { | |
3141 | mds_rank_t dest_rank(r); | |
3142 | if (dest_rank == mds->get_nodeid()) | |
3143 | dispatch_client_request(mdr); | |
3144 | else | |
3145 | mdcache->request_forward(mdr, dest_rank); | |
3146 | return; | |
3147 | } | |
3148 | ||
3149 | // give up | |
3150 | if (r == -ENOENT || r == -ENODATA) | |
3151 | r = -ESTALE; | |
3152 | respond_to_request(mdr, r); | |
3153 | } | |
3154 | ||
3155 | ||
3156 | /* This function takes responsibility for the passed mdr*/ | |
3157 | void Server::handle_client_open(MDRequestRef& mdr) | |
3158 | { | |
3159 | MClientRequest *req = mdr->client_request; | |
3160 | dout(7) << "open on " << req->get_filepath() << dendl; | |
3161 | ||
3162 | int flags = req->head.args.open.flags; | |
3163 | int cmode = ceph_flags_to_mode(flags); | |
3164 | if (cmode < 0) { | |
3165 | respond_to_request(mdr, -EINVAL); | |
3166 | return; | |
3167 | } | |
3168 | ||
3169 | bool need_auth = !file_mode_is_readonly(cmode) || (flags & CEPH_O_TRUNC); | |
3170 | ||
3171 | if ((cmode & CEPH_FILE_MODE_WR) && mdcache->is_readonly()) { | |
3172 | dout(7) << "read-only FS" << dendl; | |
3173 | respond_to_request(mdr, -EROFS); | |
3174 | return; | |
3175 | } | |
3176 | ||
3177 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3178 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, need_auth); | |
3179 | if (!cur) | |
3180 | return; | |
3181 | ||
3182 | if (cur->is_frozen() || cur->state_test(CInode::STATE_EXPORTINGCAPS)) { | |
3183 | assert(!need_auth); | |
3184 | mdr->done_locking = false; | |
3185 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
3186 | if (!cur) | |
3187 | return; | |
3188 | } | |
3189 | ||
3190 | if (!cur->inode.is_file()) { | |
3191 | // can only open non-regular inode with mode FILE_MODE_PIN, at least for now. | |
3192 | cmode = CEPH_FILE_MODE_PIN; | |
3193 | // the inode is symlink and client wants to follow it, ignore the O_TRUNC flag. | |
3194 | if (cur->inode.is_symlink() && !(flags & CEPH_O_NOFOLLOW)) | |
3195 | flags &= ~CEPH_O_TRUNC; | |
3196 | } | |
3197 | ||
3198 | dout(10) << "open flags = " << flags | |
3199 | << ", filemode = " << cmode | |
3200 | << ", need_auth = " << need_auth | |
3201 | << dendl; | |
3202 | ||
3203 | // regular file? | |
3204 | /*if (!cur->inode.is_file() && !cur->inode.is_dir()) { | |
3205 | dout(7) << "not a file or dir " << *cur << dendl; | |
3206 | respond_to_request(mdr, -ENXIO); // FIXME what error do we want? | |
3207 | return; | |
3208 | }*/ | |
3209 | if ((flags & CEPH_O_DIRECTORY) && !cur->inode.is_dir() && !cur->inode.is_symlink()) { | |
3210 | dout(7) << "specified O_DIRECTORY on non-directory " << *cur << dendl; | |
3211 | respond_to_request(mdr, -EINVAL); | |
3212 | return; | |
3213 | } | |
3214 | ||
3215 | if ((flags & CEPH_O_TRUNC) && !cur->inode.is_file()) { | |
3216 | dout(7) << "specified O_TRUNC on !(file|symlink) " << *cur << dendl; | |
3217 | // we should return -EISDIR for directory, return -EINVAL for other non-regular | |
3218 | respond_to_request(mdr, cur->inode.is_dir() ? -EISDIR : -EINVAL); | |
3219 | return; | |
3220 | } | |
3221 | ||
3222 | if (cur->inode.inline_data.version != CEPH_INLINE_NONE && | |
3223 | !mdr->session->connection->has_feature(CEPH_FEATURE_MDS_INLINE_DATA)) { | |
3224 | dout(7) << "old client cannot open inline data file " << *cur << dendl; | |
3225 | respond_to_request(mdr, -EPERM); | |
3226 | return; | |
3227 | } | |
3228 | ||
3229 | // snapped data is read only | |
3230 | if (mdr->snapid != CEPH_NOSNAP && | |
3231 | ((cmode & CEPH_FILE_MODE_WR) || req->may_write())) { | |
3232 | dout(7) << "snap " << mdr->snapid << " is read-only " << *cur << dendl; | |
3233 | respond_to_request(mdr, -EROFS); | |
3234 | return; | |
3235 | } | |
3236 | ||
3237 | unsigned mask = req->head.args.open.mask; | |
3238 | if (mask) { | |
3239 | Capability *cap = cur->get_client_cap(mdr->get_client()); | |
3240 | int issued = 0; | |
3241 | if (cap && (mdr->snapid == CEPH_NOSNAP || mdr->snapid <= cap->client_follows)) | |
3242 | issued = cap->issued(); | |
3243 | // permission bits, ACL/security xattrs | |
3244 | if ((mask & CEPH_CAP_AUTH_SHARED) && (issued & CEPH_CAP_AUTH_EXCL) == 0) | |
3245 | rdlocks.insert(&cur->authlock); | |
3246 | if ((mask & CEPH_CAP_XATTR_SHARED) && (issued & CEPH_CAP_XATTR_EXCL) == 0) | |
3247 | rdlocks.insert(&cur->xattrlock); | |
3248 | ||
3249 | mdr->getattr_caps = mask; | |
3250 | } | |
3251 | ||
3252 | // O_TRUNC | |
3253 | if ((flags & CEPH_O_TRUNC) && !mdr->has_completed) { | |
3254 | assert(cur->is_auth()); | |
3255 | ||
3256 | xlocks.insert(&cur->filelock); | |
3257 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3258 | return; | |
3259 | ||
3260 | if (!check_access(mdr, cur, MAY_WRITE)) | |
3261 | return; | |
3262 | ||
3263 | // wait for pending truncate? | |
3264 | const inode_t *pi = cur->get_projected_inode(); | |
3265 | if (pi->is_truncating()) { | |
3266 | dout(10) << " waiting for pending truncate from " << pi->truncate_from | |
3267 | << " to " << pi->truncate_size << " to complete on " << *cur << dendl; | |
3268 | mds->locker->drop_locks(mdr.get()); | |
3269 | mdr->drop_local_auth_pins(); | |
3270 | cur->add_waiter(CInode::WAIT_TRUNC, new C_MDS_RetryRequest(mdcache, mdr)); | |
3271 | return; | |
3272 | } | |
3273 | ||
3274 | do_open_truncate(mdr, cmode); | |
3275 | return; | |
3276 | } | |
3277 | ||
3278 | // sync filelock if snapped. | |
3279 | // this makes us wait for writers to flushsnaps, ensuring we get accurate metadata, | |
3280 | // and that data itself is flushed so that we can read the snapped data off disk. | |
3281 | if (mdr->snapid != CEPH_NOSNAP && !cur->is_dir()) { | |
3282 | rdlocks.insert(&cur->filelock); | |
3283 | } | |
3284 | ||
3285 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3286 | return; | |
3287 | ||
3288 | mask = MAY_READ; | |
3289 | if (cmode & CEPH_FILE_MODE_WR) | |
3290 | mask |= MAY_WRITE; | |
3291 | if (!check_access(mdr, cur, mask)) | |
3292 | return; | |
3293 | ||
3294 | if (cur->is_file() || cur->is_dir()) { | |
3295 | if (mdr->snapid == CEPH_NOSNAP) { | |
3296 | // register new cap | |
3297 | Capability *cap = mds->locker->issue_new_caps(cur, cmode, mdr->session, 0, req->is_replay()); | |
3298 | if (cap) | |
3299 | dout(12) << "open issued caps " << ccap_string(cap->pending()) | |
3300 | << " for " << req->get_source() | |
3301 | << " on " << *cur << dendl; | |
3302 | } else { | |
3303 | int caps = ceph_caps_for_mode(cmode); | |
3304 | dout(12) << "open issued IMMUTABLE SNAP caps " << ccap_string(caps) | |
3305 | << " for " << req->get_source() | |
3306 | << " snapid " << mdr->snapid | |
3307 | << " on " << *cur << dendl; | |
3308 | mdr->snap_caps = caps; | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | // increase max_size? | |
3313 | if (cmode & CEPH_FILE_MODE_WR) | |
3314 | mds->locker->check_inode_max_size(cur); | |
3315 | ||
3316 | // make sure this inode gets into the journal | |
3317 | if (cur->is_auth() && cur->last == CEPH_NOSNAP && | |
3318 | !cur->item_open_file.is_on_list()) { | |
3319 | LogSegment *ls = mds->mdlog->get_current_segment(); | |
3320 | EOpen *le = new EOpen(mds->mdlog); | |
3321 | mdlog->start_entry(le); | |
3322 | le->add_clean_inode(cur); | |
3323 | ls->open_files.push_back(&cur->item_open_file); | |
3324 | mdlog->submit_entry(le); | |
3325 | } | |
3326 | ||
3327 | // hit pop | |
3328 | if (cmode & CEPH_FILE_MODE_WR) | |
3329 | mds->balancer->hit_inode(mdr->get_mds_stamp(), cur, META_POP_IWR); | |
3330 | else | |
3331 | mds->balancer->hit_inode(mdr->get_mds_stamp(), cur, META_POP_IRD, | |
3332 | mdr->client_request->get_source().num()); | |
3333 | ||
3334 | CDentry *dn = 0; | |
3335 | if (req->get_dentry_wanted()) { | |
3336 | assert(mdr->dn[0].size()); | |
3337 | dn = mdr->dn[0].back(); | |
3338 | } | |
3339 | ||
3340 | mdr->tracei = cur; | |
3341 | mdr->tracedn = dn; | |
3342 | respond_to_request(mdr, 0); | |
3343 | } | |
3344 | ||
3345 | class C_MDS_openc_finish : public ServerLogContext { | |
3346 | CDentry *dn; | |
3347 | CInode *newi; | |
3348 | snapid_t follows; | |
3349 | public: | |
3350 | C_MDS_openc_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ni, snapid_t f) : | |
3351 | ServerLogContext(s, r), dn(d), newi(ni), follows(f) {} | |
3352 | void finish(int r) override { | |
3353 | assert(r == 0); | |
3354 | ||
3355 | dn->pop_projected_linkage(); | |
3356 | ||
3357 | // dirty inode, dn, dir | |
3358 | newi->inode.version--; // a bit hacky, see C_MDS_mknod_finish | |
3359 | newi->mark_dirty(newi->inode.version+1, mdr->ls); | |
3360 | newi->_mark_dirty_parent(mdr->ls, true); | |
3361 | ||
3362 | mdr->apply(); | |
3363 | ||
3364 | get_mds()->locker->share_inode_max_size(newi); | |
3365 | ||
3366 | MDRequestRef null_ref; | |
3367 | get_mds()->mdcache->send_dentry_link(dn, null_ref); | |
3368 | ||
3369 | get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), newi, META_POP_IWR); | |
3370 | ||
3371 | server->respond_to_request(mdr, 0); | |
3372 | ||
3373 | assert(g_conf->mds_kill_openc_at != 1); | |
3374 | } | |
3375 | }; | |
3376 | ||
3377 | /* This function takes responsibility for the passed mdr*/ | |
3378 | void Server::handle_client_openc(MDRequestRef& mdr) | |
3379 | { | |
3380 | MClientRequest *req = mdr->client_request; | |
3381 | client_t client = mdr->get_client(); | |
3382 | ||
3383 | dout(7) << "open w/ O_CREAT on " << req->get_filepath() << dendl; | |
3384 | ||
3385 | int cmode = ceph_flags_to_mode(req->head.args.open.flags); | |
3386 | if (cmode < 0) { | |
3387 | respond_to_request(mdr, -EINVAL); | |
3388 | return; | |
3389 | } | |
3390 | ||
3391 | if (!(req->head.args.open.flags & CEPH_O_EXCL)) { | |
3392 | int r = mdcache->path_traverse(mdr, NULL, NULL, req->get_filepath(), | |
3393 | &mdr->dn[0], NULL, MDS_TRAVERSE_FORWARD); | |
3394 | if (r > 0) return; | |
3395 | if (r == 0) { | |
3396 | // it existed. | |
3397 | handle_client_open(mdr); | |
3398 | return; | |
3399 | } | |
3400 | if (r < 0 && r != -ENOENT) { | |
3401 | if (r == -ESTALE) { | |
3402 | dout(10) << "FAIL on ESTALE but attempting recovery" << dendl; | |
3403 | MDSInternalContextBase *c = new C_MDS_TryFindInode(this, mdr); | |
3404 | mdcache->find_ino_peers(req->get_filepath().get_ino(), c); | |
3405 | } else { | |
3406 | dout(10) << "FAIL on error " << r << dendl; | |
3407 | respond_to_request(mdr, r); | |
3408 | } | |
3409 | return; | |
3410 | } | |
3411 | // r == -ENOENT | |
3412 | } | |
3413 | ||
3414 | bool excl = (req->head.args.open.flags & CEPH_O_EXCL); | |
3415 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3416 | file_layout_t *dir_layout = NULL; | |
3417 | CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, | |
3418 | !excl, false, false, &dir_layout); | |
3419 | if (!dn) return; | |
3420 | if (mdr->snapid != CEPH_NOSNAP) { | |
3421 | respond_to_request(mdr, -EROFS); | |
3422 | return; | |
3423 | } | |
3424 | // set layout | |
3425 | file_layout_t layout; | |
3426 | if (dir_layout) | |
3427 | layout = *dir_layout; | |
3428 | else | |
3429 | layout = mdcache->default_file_layout; | |
3430 | ||
3431 | // What kind of client caps are required to complete this operation | |
3432 | uint64_t access = MAY_WRITE; | |
3433 | ||
3434 | const auto default_layout = layout; | |
3435 | ||
3436 | // fill in any special params from client | |
3437 | if (req->head.args.open.stripe_unit) | |
3438 | layout.stripe_unit = req->head.args.open.stripe_unit; | |
3439 | if (req->head.args.open.stripe_count) | |
3440 | layout.stripe_count = req->head.args.open.stripe_count; | |
3441 | if (req->head.args.open.object_size) | |
3442 | layout.object_size = req->head.args.open.object_size; | |
3443 | if (req->get_connection()->has_feature(CEPH_FEATURE_CREATEPOOLID) && | |
3444 | (__s32)req->head.args.open.pool >= 0) { | |
3445 | layout.pool_id = req->head.args.open.pool; | |
3446 | ||
3447 | // make sure we have as new a map as the client | |
3448 | if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) { | |
3449 | mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr)); | |
3450 | return; | |
3451 | } | |
3452 | } | |
3453 | ||
3454 | // If client doesn't have capability to modify layout pools, then | |
3455 | // only permit this request if the requested pool matches what the | |
3456 | // file would have inherited anyway from its parent. | |
3457 | if (default_layout != layout) { | |
3458 | access |= MAY_SET_VXATTR; | |
3459 | } | |
3460 | ||
3461 | if (!layout.is_valid()) { | |
3462 | dout(10) << " invalid initial file layout" << dendl; | |
3463 | respond_to_request(mdr, -EINVAL); | |
3464 | return; | |
3465 | } | |
3466 | if (!mds->mdsmap->is_data_pool(layout.pool_id)) { | |
3467 | dout(10) << " invalid data pool " << layout.pool_id << dendl; | |
3468 | respond_to_request(mdr, -EINVAL); | |
3469 | return; | |
3470 | } | |
3471 | ||
3472 | CDir *dir = dn->get_dir(); | |
3473 | CInode *diri = dir->get_inode(); | |
3474 | rdlocks.insert(&diri->authlock); | |
3475 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3476 | return; | |
3477 | ||
3478 | if (!check_access(mdr, diri, access)) | |
3479 | return; | |
3480 | ||
3481 | if (!check_fragment_space(mdr, dir)) | |
3482 | return; | |
3483 | ||
3484 | CDentry::linkage_t *dnl = dn->get_projected_linkage(); | |
3485 | ||
3486 | if (!dnl->is_null()) { | |
3487 | // it existed. | |
3488 | assert(req->head.args.open.flags & CEPH_O_EXCL); | |
3489 | dout(10) << "O_EXCL, target exists, failing with -EEXIST" << dendl; | |
3490 | mdr->tracei = dnl->get_inode(); | |
3491 | mdr->tracedn = dn; | |
3492 | respond_to_request(mdr, -EEXIST); | |
3493 | return; | |
3494 | } | |
3495 | ||
3496 | // created null dn. | |
3497 | ||
3498 | // create inode. | |
3499 | SnapRealm *realm = diri->find_snaprealm(); // use directory's realm; inode isn't attached yet. | |
3500 | snapid_t follows = realm->get_newest_seq(); | |
3501 | ||
3502 | CInode *in = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), | |
3503 | req->head.args.open.mode | S_IFREG, &layout); | |
3504 | assert(in); | |
3505 | ||
3506 | // it's a file. | |
3507 | dn->push_projected_linkage(in); | |
3508 | ||
3509 | in->inode.version = dn->pre_dirty(); | |
3510 | if (layout.pool_id != mdcache->default_file_layout.pool_id) | |
3511 | in->inode.add_old_pool(mdcache->default_file_layout.pool_id); | |
3512 | in->inode.update_backtrace(); | |
3513 | if (cmode & CEPH_FILE_MODE_WR) { | |
3514 | in->inode.client_ranges[client].range.first = 0; | |
3515 | in->inode.client_ranges[client].range.last = in->inode.get_layout_size_increment(); | |
3516 | in->inode.client_ranges[client].follows = follows; | |
3517 | } | |
3518 | in->inode.rstat.rfiles = 1; | |
3519 | ||
3520 | assert(dn->first == follows+1); | |
3521 | in->first = dn->first; | |
3522 | ||
3523 | // prepare finisher | |
3524 | mdr->ls = mdlog->get_current_segment(); | |
3525 | EUpdate *le = new EUpdate(mdlog, "openc"); | |
3526 | mdlog->start_entry(le); | |
3527 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
3528 | journal_allocated_inos(mdr, &le->metablob); | |
3529 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
3530 | le->metablob.add_primary_dentry(dn, in, true, true, true); | |
3531 | ||
3532 | // do the open | |
3533 | mds->locker->issue_new_caps(in, cmode, mdr->session, realm, req->is_replay()); | |
3534 | in->authlock.set_state(LOCK_EXCL); | |
3535 | in->xattrlock.set_state(LOCK_EXCL); | |
3536 | ||
3537 | // make sure this inode gets into the journal | |
3538 | le->metablob.add_opened_ino(in->ino()); | |
3539 | LogSegment *ls = mds->mdlog->get_current_segment(); | |
3540 | ls->open_files.push_back(&in->item_open_file); | |
3541 | ||
3542 | C_MDS_openc_finish *fin = new C_MDS_openc_finish(this, mdr, dn, in, follows); | |
3543 | ||
3544 | if (mdr->client_request->get_connection()->has_feature(CEPH_FEATURE_REPLY_CREATE_INODE)) { | |
3545 | dout(10) << "adding ino to reply to indicate inode was created" << dendl; | |
3546 | // add the file created flag onto the reply if create_flags features is supported | |
3547 | ::encode(in->inode.ino, mdr->reply_extra_bl); | |
3548 | } | |
3549 | ||
3550 | journal_and_reply(mdr, in, dn, le, fin); | |
3551 | ||
3552 | // We hit_dir (via hit_inode) in our finish callback, but by then we might | |
3553 | // have overshot the split size (multiple opencs in flight), so here is | |
3554 | // an early chance to split the dir if this openc makes it oversized. | |
3555 | mds->balancer->maybe_fragment(dir, false); | |
3556 | } | |
3557 | ||
3558 | ||
3559 | ||
3560 | void Server::handle_client_readdir(MDRequestRef& mdr) | |
3561 | { | |
3562 | MClientRequest *req = mdr->client_request; | |
3563 | client_t client = req->get_source().num(); | |
3564 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3565 | CInode *diri = rdlock_path_pin_ref(mdr, 0, rdlocks, false, true); | |
3566 | if (!diri) return; | |
3567 | ||
3568 | // it's a directory, right? | |
3569 | if (!diri->is_dir()) { | |
3570 | // not a dir | |
3571 | dout(10) << "reply to " << *req << " readdir -ENOTDIR" << dendl; | |
3572 | respond_to_request(mdr, -ENOTDIR); | |
3573 | return; | |
3574 | } | |
3575 | ||
3576 | rdlocks.insert(&diri->filelock); | |
3577 | rdlocks.insert(&diri->dirfragtreelock); | |
3578 | ||
3579 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
3580 | return; | |
3581 | ||
3582 | if (!check_access(mdr, diri, MAY_READ)) | |
3583 | return; | |
3584 | ||
3585 | // which frag? | |
3586 | frag_t fg = (__u32)req->head.args.readdir.frag; | |
3587 | unsigned req_flags = (__u32)req->head.args.readdir.flags; | |
3588 | string offset_str = req->get_path2(); | |
3589 | ||
3590 | __u32 offset_hash = 0; | |
3591 | if (!offset_str.empty()) | |
3592 | offset_hash = ceph_frag_value(diri->hash_dentry_name(offset_str)); | |
3593 | else | |
3594 | offset_hash = (__u32)req->head.args.readdir.offset_hash; | |
3595 | ||
3596 | dout(10) << " frag " << fg << " offset '" << offset_str << "'" | |
3597 | << " offset_hash " << offset_hash << " flags " << req_flags << dendl; | |
3598 | ||
3599 | // does the frag exist? | |
3600 | if (diri->dirfragtree[fg.value()] != fg) { | |
3601 | frag_t newfg; | |
3602 | if (req_flags & CEPH_READDIR_REPLY_BITFLAGS) { | |
3603 | if (fg.contains((unsigned)offset_hash)) { | |
3604 | newfg = diri->dirfragtree[offset_hash]; | |
3605 | } else { | |
3606 | // client actually wants next frag | |
3607 | newfg = diri->dirfragtree[fg.value()]; | |
3608 | } | |
3609 | } else { | |
3610 | offset_str.clear(); | |
3611 | newfg = diri->dirfragtree[fg.value()]; | |
3612 | } | |
3613 | dout(10) << " adjust frag " << fg << " -> " << newfg << " " << diri->dirfragtree << dendl; | |
3614 | fg = newfg; | |
3615 | } | |
3616 | ||
3617 | CDir *dir = try_open_auth_dirfrag(diri, fg, mdr); | |
3618 | if (!dir) return; | |
3619 | ||
3620 | // ok! | |
3621 | dout(10) << "handle_client_readdir on " << *dir << dendl; | |
3622 | assert(dir->is_auth()); | |
3623 | ||
3624 | if (!dir->is_complete()) { | |
3625 | if (dir->is_frozen()) { | |
3626 | dout(7) << "dir is frozen " << *dir << dendl; | |
3627 | mds->locker->drop_locks(mdr.get()); | |
3628 | mdr->drop_local_auth_pins(); | |
3629 | dir->add_waiter(CDir::WAIT_UNFREEZE, new C_MDS_RetryRequest(mdcache, mdr)); | |
3630 | return; | |
3631 | } | |
3632 | // fetch | |
3633 | dout(10) << " incomplete dir contents for readdir on " << *dir << ", fetching" << dendl; | |
3634 | dir->fetch(new C_MDS_RetryRequest(mdcache, mdr), true); | |
3635 | return; | |
3636 | } | |
3637 | ||
3638 | #ifdef MDS_VERIFY_FRAGSTAT | |
3639 | dir->verify_fragstat(); | |
3640 | #endif | |
3641 | ||
3642 | utime_t now = ceph_clock_now(); | |
3643 | mdr->set_mds_stamp(now); | |
3644 | ||
3645 | snapid_t snapid = mdr->snapid; | |
3646 | dout(10) << "snapid " << snapid << dendl; | |
3647 | ||
3648 | SnapRealm *realm = diri->find_snaprealm(); | |
3649 | ||
3650 | unsigned max = req->head.args.readdir.max_entries; | |
3651 | if (!max) | |
3652 | max = dir->get_num_any(); // whatever, something big. | |
3653 | unsigned max_bytes = req->head.args.readdir.max_bytes; | |
3654 | if (!max_bytes) | |
3655 | // make sure at least one item can be encoded | |
3656 | max_bytes = (512 << 10) + g_conf->mds_max_xattr_pairs_size; | |
3657 | ||
3658 | // start final blob | |
3659 | bufferlist dirbl; | |
3660 | dir->encode_dirstat(dirbl, mds->get_nodeid()); | |
3661 | ||
3662 | // count bytes available. | |
3663 | // this isn't perfect, but we should capture the main variable/unbounded size items! | |
3664 | int front_bytes = dirbl.length() + sizeof(__u32) + sizeof(__u8)*2; | |
3665 | int bytes_left = max_bytes - front_bytes; | |
3666 | bytes_left -= realm->get_snap_trace().length(); | |
3667 | ||
3668 | // build dir contents | |
3669 | bufferlist dnbl; | |
3670 | __u32 numfiles = 0; | |
3671 | bool start = !offset_hash && offset_str.empty(); | |
3672 | bool end = (dir->begin() == dir->end()); | |
3673 | // skip all dns < dentry_key_t(snapid, offset_str, offset_hash) | |
3674 | dentry_key_t skip_key(snapid, offset_str.c_str(), offset_hash); | |
3675 | for (CDir::map_t::iterator it = start ? dir->begin() : dir->lower_bound(skip_key); | |
3676 | !end && numfiles < max; | |
3677 | end = (it == dir->end())) { | |
3678 | CDentry *dn = it->second; | |
3679 | ++it; | |
3680 | ||
3681 | if (dn->state_test(CDentry::STATE_PURGING)) | |
3682 | continue; | |
3683 | ||
3684 | bool dnp = dn->use_projected(client, mdr); | |
3685 | CDentry::linkage_t *dnl = dnp ? dn->get_projected_linkage() : dn->get_linkage(); | |
3686 | ||
3687 | if (dnl->is_null()) | |
3688 | continue; | |
3689 | ||
3690 | if (dn->last < snapid || dn->first > snapid) { | |
3691 | dout(20) << "skipping non-overlapping snap " << *dn << dendl; | |
3692 | continue; | |
3693 | } | |
3694 | ||
3695 | if (!start) { | |
3696 | dentry_key_t offset_key(dn->last, offset_str.c_str(), offset_hash); | |
3697 | if (!(offset_key < dn->key())) | |
3698 | continue; | |
3699 | } | |
3700 | ||
3701 | CInode *in = dnl->get_inode(); | |
3702 | ||
3703 | if (in && in->ino() == CEPH_INO_CEPH) | |
3704 | continue; | |
3705 | ||
3706 | // remote link? | |
3707 | // better for the MDS to do the work, if we think the client will stat any of these files. | |
3708 | if (dnl->is_remote() && !in) { | |
3709 | in = mdcache->get_inode(dnl->get_remote_ino()); | |
3710 | if (in) { | |
3711 | dn->link_remote(dnl, in); | |
3712 | } else if (dn->state_test(CDentry::STATE_BADREMOTEINO)) { | |
3713 | dout(10) << "skipping bad remote ino on " << *dn << dendl; | |
3714 | continue; | |
3715 | } else { | |
3716 | // touch everything i _do_ have | |
3717 | for (CDir::map_t::iterator p = dir->begin(); p != dir->end(); ++p) | |
3718 | if (!p->second->get_linkage()->is_null()) | |
3719 | mdcache->lru.lru_touch(p->second); | |
3720 | ||
3721 | // already issued caps and leases, reply immediately. | |
3722 | if (dnbl.length() > 0) { | |
3723 | mdcache->open_remote_dentry(dn, dnp, new C_MDSInternalNoop); | |
3724 | dout(10) << " open remote dentry after caps were issued, stopping at " | |
3725 | << dnbl.length() << " < " << bytes_left << dendl; | |
3726 | break; | |
3727 | } | |
3728 | ||
3729 | mds->locker->drop_locks(mdr.get()); | |
3730 | mdr->drop_local_auth_pins(); | |
3731 | mdcache->open_remote_dentry(dn, dnp, new C_MDS_RetryRequest(mdcache, mdr)); | |
3732 | return; | |
3733 | } | |
3734 | } | |
3735 | assert(in); | |
3736 | ||
3737 | if ((int)(dnbl.length() + dn->name.length() + sizeof(__u32) + sizeof(LeaseStat)) > bytes_left) { | |
3738 | dout(10) << " ran out of room, stopping at " << dnbl.length() << " < " << bytes_left << dendl; | |
3739 | break; | |
3740 | } | |
3741 | ||
3742 | unsigned start_len = dnbl.length(); | |
3743 | ||
3744 | // dentry | |
3745 | dout(12) << "including dn " << *dn << dendl; | |
3746 | ::encode(dn->name, dnbl); | |
3747 | mds->locker->issue_client_lease(dn, client, dnbl, now, mdr->session); | |
3748 | ||
3749 | // inode | |
3750 | dout(12) << "including inode " << *in << dendl; | |
3751 | int r = in->encode_inodestat(dnbl, mdr->session, realm, snapid, bytes_left - (int)dnbl.length()); | |
3752 | if (r < 0) { | |
3753 | // chop off dn->name, lease | |
3754 | dout(10) << " ran out of room, stopping at " << start_len << " < " << bytes_left << dendl; | |
3755 | bufferlist keep; | |
3756 | keep.substr_of(dnbl, 0, start_len); | |
3757 | dnbl.swap(keep); | |
3758 | break; | |
3759 | } | |
3760 | assert(r >= 0); | |
3761 | numfiles++; | |
3762 | ||
3763 | // touch dn | |
3764 | mdcache->lru.lru_touch(dn); | |
3765 | } | |
3766 | ||
3767 | __u16 flags = 0; | |
3768 | if (end) { | |
3769 | flags = CEPH_READDIR_FRAG_END; | |
3770 | if (start) | |
3771 | flags |= CEPH_READDIR_FRAG_COMPLETE; // FIXME: what purpose does this serve | |
3772 | } | |
3773 | // client only understand END and COMPLETE flags ? | |
3774 | if (req_flags & CEPH_READDIR_REPLY_BITFLAGS) { | |
3775 | flags |= CEPH_READDIR_HASH_ORDER | CEPH_READDIR_OFFSET_HASH; | |
3776 | } | |
3777 | ||
3778 | // finish final blob | |
3779 | ::encode(numfiles, dirbl); | |
3780 | ::encode(flags, dirbl); | |
3781 | dirbl.claim_append(dnbl); | |
3782 | ||
3783 | // yay, reply | |
3784 | dout(10) << "reply to " << *req << " readdir num=" << numfiles | |
3785 | << " bytes=" << dirbl.length() | |
3786 | << " start=" << (int)start | |
3787 | << " end=" << (int)end | |
3788 | << dendl; | |
3789 | mdr->reply_extra_bl = dirbl; | |
3790 | ||
3791 | // bump popularity. NOTE: this doesn't quite capture it. | |
3792 | mds->balancer->hit_dir(now, dir, META_POP_IRD, -1, numfiles); | |
3793 | ||
3794 | // reply | |
3795 | mdr->tracei = diri; | |
3796 | respond_to_request(mdr, 0); | |
3797 | } | |
3798 | ||
3799 | ||
3800 | ||
3801 | // =============================================================================== | |
3802 | // INODE UPDATES | |
3803 | ||
3804 | ||
3805 | /* | |
3806 | * finisher for basic inode updates | |
3807 | */ | |
3808 | class C_MDS_inode_update_finish : public ServerLogContext { | |
3809 | CInode *in; | |
3810 | bool truncating_smaller, changed_ranges; | |
3811 | public: | |
3812 | C_MDS_inode_update_finish(Server *s, MDRequestRef& r, CInode *i, | |
3813 | bool sm=false, bool cr=false) : | |
3814 | ServerLogContext(s, r), in(i), truncating_smaller(sm), changed_ranges(cr) { } | |
3815 | void finish(int r) override { | |
3816 | assert(r == 0); | |
3817 | ||
3818 | // apply | |
3819 | in->pop_and_dirty_projected_inode(mdr->ls); | |
3820 | mdr->apply(); | |
3821 | ||
3822 | // notify any clients | |
3823 | if (truncating_smaller && in->inode.is_truncating()) { | |
3824 | get_mds()->locker->issue_truncate(in); | |
3825 | get_mds()->mdcache->truncate_inode(in, mdr->ls); | |
3826 | } | |
3827 | ||
3828 | get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR); | |
3829 | ||
3830 | server->respond_to_request(mdr, 0); | |
3831 | ||
3832 | if (changed_ranges) | |
3833 | get_mds()->locker->share_inode_max_size(in); | |
3834 | } | |
3835 | }; | |
3836 | ||
3837 | void Server::handle_client_file_setlock(MDRequestRef& mdr) | |
3838 | { | |
3839 | MClientRequest *req = mdr->client_request; | |
3840 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3841 | ||
3842 | // get the inode to operate on, and set up any locks needed for that | |
3843 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
3844 | if (!cur) | |
3845 | return; | |
3846 | ||
3847 | xlocks.insert(&cur->flocklock); | |
3848 | /* acquire_locks will return true if it gets the locks. If it fails, | |
3849 | it will redeliver this request at a later date, so drop the request. | |
3850 | */ | |
3851 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) { | |
3852 | dout(10) << "handle_client_file_setlock could not get locks!" << dendl; | |
3853 | return; | |
3854 | } | |
3855 | ||
3856 | // copy the lock change into a ceph_filelock so we can store/apply it | |
3857 | ceph_filelock set_lock; | |
3858 | set_lock.start = req->head.args.filelock_change.start; | |
3859 | set_lock.length = req->head.args.filelock_change.length; | |
3860 | set_lock.client = req->get_orig_source().num(); | |
3861 | set_lock.owner = req->head.args.filelock_change.owner; | |
3862 | set_lock.pid = req->head.args.filelock_change.pid; | |
3863 | set_lock.type = req->head.args.filelock_change.type; | |
3864 | bool will_wait = req->head.args.filelock_change.wait; | |
3865 | ||
3866 | dout(10) << "handle_client_file_setlock: " << set_lock << dendl; | |
3867 | ||
3868 | ceph_lock_state_t *lock_state = NULL; | |
3869 | bool interrupt = false; | |
3870 | ||
3871 | // get the appropriate lock state | |
3872 | switch (req->head.args.filelock_change.rule) { | |
3873 | case CEPH_LOCK_FLOCK_INTR: | |
3874 | interrupt = true; | |
3875 | // fall-thru | |
3876 | case CEPH_LOCK_FLOCK: | |
3877 | lock_state = cur->get_flock_lock_state(); | |
3878 | break; | |
3879 | ||
3880 | case CEPH_LOCK_FCNTL_INTR: | |
3881 | interrupt = true; | |
3882 | // fall-thru | |
3883 | case CEPH_LOCK_FCNTL: | |
3884 | lock_state = cur->get_fcntl_lock_state(); | |
3885 | break; | |
3886 | ||
3887 | default: | |
3888 | dout(10) << "got unknown lock type " << set_lock.type | |
3889 | << ", dropping request!" << dendl; | |
3890 | respond_to_request(mdr, -EOPNOTSUPP); | |
3891 | return; | |
3892 | } | |
3893 | ||
3894 | dout(10) << " state prior to lock change: " << *lock_state << dendl; | |
3895 | if (CEPH_LOCK_UNLOCK == set_lock.type) { | |
3896 | list<ceph_filelock> activated_locks; | |
3897 | list<MDSInternalContextBase*> waiters; | |
3898 | if (lock_state->is_waiting(set_lock)) { | |
3899 | dout(10) << " unlock removing waiting lock " << set_lock << dendl; | |
3900 | lock_state->remove_waiting(set_lock); | |
3901 | cur->take_waiting(CInode::WAIT_FLOCK, waiters); | |
3902 | } else if (!interrupt) { | |
3903 | dout(10) << " unlock attempt on " << set_lock << dendl; | |
3904 | lock_state->remove_lock(set_lock, activated_locks); | |
3905 | cur->take_waiting(CInode::WAIT_FLOCK, waiters); | |
3906 | } | |
3907 | mds->queue_waiters(waiters); | |
3908 | ||
3909 | respond_to_request(mdr, 0); | |
3910 | } else { | |
3911 | dout(10) << " lock attempt on " << set_lock << dendl; | |
3912 | bool deadlock = false; | |
3913 | if (mdr->more()->flock_was_waiting && | |
3914 | !lock_state->is_waiting(set_lock)) { | |
3915 | dout(10) << " was waiting for lock but not anymore, must have been canceled " << set_lock << dendl; | |
3916 | respond_to_request(mdr, -EINTR); | |
3917 | } else if (!lock_state->add_lock(set_lock, will_wait, mdr->more()->flock_was_waiting, &deadlock)) { | |
3918 | dout(10) << " it failed on this attempt" << dendl; | |
3919 | // couldn't set lock right now | |
3920 | if (deadlock) { | |
3921 | respond_to_request(mdr, -EDEADLK); | |
3922 | } else if (!will_wait) { | |
3923 | respond_to_request(mdr, -EWOULDBLOCK); | |
3924 | } else { | |
3925 | dout(10) << " added to waiting list" << dendl; | |
3926 | assert(lock_state->is_waiting(set_lock)); | |
3927 | mdr->more()->flock_was_waiting = true; | |
3928 | mds->locker->drop_locks(mdr.get()); | |
3929 | mdr->drop_local_auth_pins(); | |
3930 | cur->add_waiter(CInode::WAIT_FLOCK, new C_MDS_RetryRequest(mdcache, mdr)); | |
3931 | } | |
3932 | } else | |
3933 | respond_to_request(mdr, 0); | |
3934 | } | |
3935 | dout(10) << " state after lock change: " << *lock_state << dendl; | |
3936 | } | |
3937 | ||
3938 | void Server::handle_client_file_readlock(MDRequestRef& mdr) | |
3939 | { | |
3940 | MClientRequest *req = mdr->client_request; | |
3941 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3942 | ||
3943 | // get the inode to operate on, and set up any locks needed for that | |
3944 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
3945 | if (!cur) | |
3946 | return; | |
3947 | ||
3948 | /* acquire_locks will return true if it gets the locks. If it fails, | |
3949 | it will redeliver this request at a later date, so drop the request. | |
3950 | */ | |
3951 | rdlocks.insert(&cur->flocklock); | |
3952 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) { | |
3953 | dout(10) << "handle_client_file_readlock could not get locks!" << dendl; | |
3954 | return; | |
3955 | } | |
3956 | ||
3957 | // copy the lock change into a ceph_filelock so we can store/apply it | |
3958 | ceph_filelock checking_lock; | |
3959 | checking_lock.start = req->head.args.filelock_change.start; | |
3960 | checking_lock.length = req->head.args.filelock_change.length; | |
3961 | checking_lock.client = req->get_orig_source().num(); | |
3962 | checking_lock.owner = req->head.args.filelock_change.owner; | |
3963 | checking_lock.pid = req->head.args.filelock_change.pid; | |
3964 | checking_lock.type = req->head.args.filelock_change.type; | |
3965 | ||
3966 | // get the appropriate lock state | |
3967 | ceph_lock_state_t *lock_state = NULL; | |
3968 | switch (req->head.args.filelock_change.rule) { | |
3969 | case CEPH_LOCK_FLOCK: | |
3970 | lock_state = cur->get_flock_lock_state(); | |
3971 | break; | |
3972 | ||
3973 | case CEPH_LOCK_FCNTL: | |
3974 | lock_state = cur->get_fcntl_lock_state(); | |
3975 | break; | |
3976 | ||
3977 | default: | |
3978 | dout(10) << "got unknown lock type " << checking_lock.type << dendl; | |
3979 | respond_to_request(mdr, -EINVAL); | |
3980 | return; | |
3981 | } | |
3982 | lock_state->look_for_lock(checking_lock); | |
3983 | ||
3984 | bufferlist lock_bl; | |
3985 | ::encode(checking_lock, lock_bl); | |
3986 | ||
3987 | mdr->reply_extra_bl = lock_bl; | |
3988 | respond_to_request(mdr, 0); | |
3989 | } | |
3990 | ||
3991 | void Server::handle_client_setattr(MDRequestRef& mdr) | |
3992 | { | |
3993 | MClientRequest *req = mdr->client_request; | |
3994 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
3995 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
3996 | if (!cur) return; | |
3997 | ||
3998 | if (mdr->snapid != CEPH_NOSNAP) { | |
3999 | respond_to_request(mdr, -EROFS); | |
4000 | return; | |
4001 | } | |
4002 | if (cur->ino() < MDS_INO_SYSTEM_BASE && !cur->is_base()) { | |
4003 | respond_to_request(mdr, -EPERM); | |
4004 | return; | |
4005 | } | |
4006 | ||
4007 | __u32 mask = req->head.args.setattr.mask; | |
4008 | __u32 access_mask = MAY_WRITE; | |
4009 | ||
4010 | // xlock inode | |
4011 | if (mask & (CEPH_SETATTR_MODE|CEPH_SETATTR_UID|CEPH_SETATTR_GID|CEPH_SETATTR_BTIME|CEPH_SETATTR_KILL_SGUID)) | |
4012 | xlocks.insert(&cur->authlock); | |
4013 | if (mask & (CEPH_SETATTR_MTIME|CEPH_SETATTR_ATIME|CEPH_SETATTR_SIZE)) | |
4014 | xlocks.insert(&cur->filelock); | |
4015 | if (mask & CEPH_SETATTR_CTIME) | |
4016 | wrlocks.insert(&cur->versionlock); | |
4017 | ||
4018 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4019 | return; | |
4020 | ||
4021 | if ((mask & CEPH_SETATTR_UID) && (cur->inode.uid != req->head.args.setattr.uid)) | |
4022 | access_mask |= MAY_CHOWN; | |
4023 | ||
4024 | if ((mask & CEPH_SETATTR_GID) && (cur->inode.gid != req->head.args.setattr.gid)) | |
4025 | access_mask |= MAY_CHGRP; | |
4026 | ||
4027 | if (!check_access(mdr, cur, access_mask)) | |
4028 | return; | |
4029 | ||
4030 | // trunc from bigger -> smaller? | |
4031 | inode_t *pi = cur->get_projected_inode(); | |
4032 | ||
4033 | uint64_t old_size = MAX(pi->size, req->head.args.setattr.old_size); | |
4034 | ||
4035 | // ENOSPC on growing file while full, but allow shrinks | |
4036 | if (is_full && req->head.args.setattr.size > old_size) { | |
4037 | dout(20) << __func__ << ": full, responding ENOSPC to setattr with larger size" << dendl; | |
4038 | respond_to_request(mdr, -ENOSPC); | |
4039 | return; | |
4040 | } | |
4041 | ||
4042 | bool truncating_smaller = false; | |
4043 | if (mask & CEPH_SETATTR_SIZE) { | |
4044 | truncating_smaller = req->head.args.setattr.size < old_size; | |
4045 | if (truncating_smaller && pi->is_truncating()) { | |
4046 | dout(10) << " waiting for pending truncate from " << pi->truncate_from | |
4047 | << " to " << pi->truncate_size << " to complete on " << *cur << dendl; | |
4048 | mds->locker->drop_locks(mdr.get()); | |
4049 | mdr->drop_local_auth_pins(); | |
4050 | cur->add_waiter(CInode::WAIT_TRUNC, new C_MDS_RetryRequest(mdcache, mdr)); | |
4051 | return; | |
4052 | } | |
4053 | } | |
4054 | ||
4055 | bool changed_ranges = false; | |
4056 | ||
4057 | // project update | |
4058 | mdr->ls = mdlog->get_current_segment(); | |
4059 | EUpdate *le = new EUpdate(mdlog, "setattr"); | |
4060 | mdlog->start_entry(le); | |
4061 | ||
4062 | pi = cur->project_inode(); | |
4063 | ||
4064 | if (mask & CEPH_SETATTR_UID) | |
4065 | pi->uid = req->head.args.setattr.uid; | |
4066 | if (mask & CEPH_SETATTR_GID) | |
4067 | pi->gid = req->head.args.setattr.gid; | |
4068 | ||
4069 | if (mask & CEPH_SETATTR_MODE) | |
4070 | pi->mode = (pi->mode & ~07777) | (req->head.args.setattr.mode & 07777); | |
4071 | else if ((mask & (CEPH_SETATTR_UID|CEPH_SETATTR_GID|CEPH_SETATTR_KILL_SGUID)) && | |
4072 | S_ISREG(pi->mode)) { | |
4073 | pi->mode &= ~S_ISUID; | |
4074 | if ((pi->mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) | |
4075 | pi->mode &= ~S_ISGID; | |
4076 | } | |
4077 | ||
4078 | if (mask & CEPH_SETATTR_MTIME) | |
4079 | pi->mtime = req->head.args.setattr.mtime; | |
4080 | if (mask & CEPH_SETATTR_ATIME) | |
4081 | pi->atime = req->head.args.setattr.atime; | |
4082 | if (mask & CEPH_SETATTR_BTIME) | |
4083 | pi->btime = req->head.args.setattr.btime; | |
4084 | if (mask & (CEPH_SETATTR_ATIME | CEPH_SETATTR_MTIME | CEPH_SETATTR_BTIME)) | |
4085 | pi->time_warp_seq++; // maybe not a timewarp, but still a serialization point. | |
4086 | if (mask & CEPH_SETATTR_SIZE) { | |
4087 | if (truncating_smaller) { | |
4088 | pi->truncate(old_size, req->head.args.setattr.size); | |
4089 | le->metablob.add_truncate_start(cur->ino()); | |
4090 | } else { | |
4091 | pi->size = req->head.args.setattr.size; | |
4092 | pi->rstat.rbytes = pi->size; | |
4093 | } | |
4094 | pi->mtime = mdr->get_op_stamp(); | |
4095 | ||
4096 | // adjust client's max_size? | |
4097 | map<client_t,client_writeable_range_t> new_ranges; | |
4098 | bool max_increased = false; | |
4099 | mds->locker->calc_new_client_ranges(cur, pi->size, &new_ranges, &max_increased); | |
4100 | if (pi->client_ranges != new_ranges) { | |
4101 | dout(10) << " client_ranges " << pi->client_ranges << " -> " << new_ranges << dendl; | |
4102 | pi->client_ranges = new_ranges; | |
4103 | changed_ranges = true; | |
4104 | } | |
4105 | } | |
4106 | ||
4107 | pi->version = cur->pre_dirty(); | |
4108 | pi->ctime = mdr->get_op_stamp(); | |
4109 | pi->change_attr++; | |
4110 | ||
4111 | // log + wait | |
4112 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4113 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4114 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4115 | ||
4116 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur, | |
4117 | truncating_smaller, changed_ranges)); | |
4118 | ||
4119 | // flush immediately if there are readers/writers waiting | |
4120 | if (xlocks.count(&cur->filelock) && | |
4121 | (cur->get_caps_wanted() & (CEPH_CAP_FILE_RD|CEPH_CAP_FILE_WR))) | |
4122 | mds->mdlog->flush(); | |
4123 | } | |
4124 | ||
4125 | /* Takes responsibility for mdr */ | |
4126 | void Server::do_open_truncate(MDRequestRef& mdr, int cmode) | |
4127 | { | |
4128 | CInode *in = mdr->in[0]; | |
4129 | client_t client = mdr->get_client(); | |
4130 | assert(in); | |
4131 | ||
4132 | dout(10) << "do_open_truncate " << *in << dendl; | |
4133 | ||
4134 | SnapRealm *realm = in->find_snaprealm(); | |
4135 | mds->locker->issue_new_caps(in, cmode, mdr->session, realm, mdr->client_request->is_replay()); | |
4136 | ||
4137 | mdr->ls = mdlog->get_current_segment(); | |
4138 | EUpdate *le = new EUpdate(mdlog, "open_truncate"); | |
4139 | mdlog->start_entry(le); | |
4140 | ||
4141 | // prepare | |
4142 | inode_t *pi = in->project_inode(); | |
4143 | pi->version = in->pre_dirty(); | |
4144 | pi->mtime = pi->ctime = mdr->get_op_stamp(); | |
4145 | pi->change_attr++; | |
4146 | ||
4147 | uint64_t old_size = MAX(pi->size, mdr->client_request->head.args.open.old_size); | |
4148 | if (old_size > 0) { | |
4149 | pi->truncate(old_size, 0); | |
4150 | le->metablob.add_truncate_start(in->ino()); | |
4151 | } | |
4152 | ||
4153 | bool changed_ranges = false; | |
4154 | if (cmode & CEPH_FILE_MODE_WR) { | |
4155 | pi->client_ranges[client].range.first = 0; | |
4156 | pi->client_ranges[client].range.last = pi->get_layout_size_increment(); | |
4157 | pi->client_ranges[client].follows = in->find_snaprealm()->get_newest_seq(); | |
4158 | changed_ranges = true; | |
4159 | } | |
4160 | ||
4161 | le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid()); | |
4162 | ||
4163 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, 0, PREDIRTY_PRIMARY); | |
4164 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, in); | |
4165 | ||
4166 | // make sure ino gets into the journal | |
4167 | le->metablob.add_opened_ino(in->ino()); | |
4168 | LogSegment *ls = mds->mdlog->get_current_segment(); | |
4169 | ls->open_files.push_back(&in->item_open_file); | |
4170 | ||
4171 | mdr->o_trunc = true; | |
4172 | ||
4173 | CDentry *dn = 0; | |
4174 | if (mdr->client_request->get_dentry_wanted()) { | |
4175 | assert(mdr->dn[0].size()); | |
4176 | dn = mdr->dn[0].back(); | |
4177 | } | |
4178 | ||
4179 | journal_and_reply(mdr, in, dn, le, new C_MDS_inode_update_finish(this, mdr, in, old_size > 0, | |
4180 | changed_ranges)); | |
4181 | // Although the `open` part can give an early reply, the truncation won't | |
4182 | // happen until our EUpdate is persistent, to give the client a prompt | |
4183 | // response we must also flush that event. | |
4184 | mdlog->flush(); | |
4185 | } | |
4186 | ||
4187 | ||
4188 | /* This function cleans up the passed mdr */ | |
4189 | void Server::handle_client_setlayout(MDRequestRef& mdr) | |
4190 | { | |
4191 | MClientRequest *req = mdr->client_request; | |
4192 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
4193 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
4194 | if (!cur) return; | |
4195 | ||
4196 | if (mdr->snapid != CEPH_NOSNAP) { | |
4197 | respond_to_request(mdr, -EROFS); | |
4198 | return; | |
4199 | } | |
4200 | if (!cur->is_file()) { | |
4201 | respond_to_request(mdr, -EINVAL); | |
4202 | return; | |
4203 | } | |
4204 | if (cur->get_projected_inode()->size || | |
4205 | cur->get_projected_inode()->truncate_seq > 1) { | |
4206 | respond_to_request(mdr, -ENOTEMPTY); | |
4207 | return; | |
4208 | } | |
4209 | ||
4210 | // validate layout | |
4211 | file_layout_t layout = cur->get_projected_inode()->layout; | |
4212 | // save existing layout for later | |
4213 | const auto old_layout = layout; | |
4214 | ||
4215 | int access = MAY_WRITE; | |
4216 | ||
4217 | if (req->head.args.setlayout.layout.fl_object_size > 0) | |
4218 | layout.object_size = req->head.args.setlayout.layout.fl_object_size; | |
4219 | if (req->head.args.setlayout.layout.fl_stripe_unit > 0) | |
4220 | layout.stripe_unit = req->head.args.setlayout.layout.fl_stripe_unit; | |
4221 | if (req->head.args.setlayout.layout.fl_stripe_count > 0) | |
4222 | layout.stripe_count=req->head.args.setlayout.layout.fl_stripe_count; | |
4223 | if (req->head.args.setlayout.layout.fl_pg_pool > 0) { | |
4224 | layout.pool_id = req->head.args.setlayout.layout.fl_pg_pool; | |
4225 | ||
4226 | // make sure we have as new a map as the client | |
4227 | if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) { | |
4228 | mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr)); | |
4229 | return; | |
4230 | } | |
4231 | } | |
4232 | ||
4233 | // Don't permit layout modifications without 'p' caps | |
4234 | if (layout != old_layout) { | |
4235 | access |= MAY_SET_VXATTR; | |
4236 | } | |
4237 | ||
4238 | if (!layout.is_valid()) { | |
4239 | dout(10) << "bad layout" << dendl; | |
4240 | respond_to_request(mdr, -EINVAL); | |
4241 | return; | |
4242 | } | |
4243 | if (!mds->mdsmap->is_data_pool(layout.pool_id)) { | |
4244 | dout(10) << " invalid data pool " << layout.pool_id << dendl; | |
4245 | respond_to_request(mdr, -EINVAL); | |
4246 | return; | |
4247 | } | |
4248 | ||
4249 | xlocks.insert(&cur->filelock); | |
4250 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4251 | return; | |
4252 | ||
4253 | if (!check_access(mdr, cur, access)) | |
4254 | return; | |
4255 | ||
4256 | // project update | |
4257 | inode_t *pi = cur->project_inode(); | |
4258 | pi->layout = layout; | |
4259 | // add the old pool to the inode | |
4260 | pi->add_old_pool(old_layout.pool_id); | |
4261 | pi->version = cur->pre_dirty(); | |
4262 | pi->ctime = mdr->get_op_stamp(); | |
4263 | pi->change_attr++; | |
4264 | ||
4265 | // log + wait | |
4266 | mdr->ls = mdlog->get_current_segment(); | |
4267 | EUpdate *le = new EUpdate(mdlog, "setlayout"); | |
4268 | mdlog->start_entry(le); | |
4269 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4270 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4271 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4272 | ||
4273 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4274 | } | |
4275 | ||
4276 | void Server::handle_client_setdirlayout(MDRequestRef& mdr) | |
4277 | { | |
4278 | MClientRequest *req = mdr->client_request; | |
4279 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
4280 | file_layout_t *dir_layout = NULL; | |
4281 | CInode *cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout); | |
4282 | if (!cur) return; | |
4283 | ||
4284 | if (mdr->snapid != CEPH_NOSNAP) { | |
4285 | respond_to_request(mdr, -EROFS); | |
4286 | return; | |
4287 | } | |
4288 | ||
4289 | if (!cur->is_dir()) { | |
4290 | respond_to_request(mdr, -ENOTDIR); | |
4291 | return; | |
4292 | } | |
4293 | ||
4294 | xlocks.insert(&cur->policylock); | |
4295 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4296 | return; | |
4297 | ||
4298 | // validate layout | |
4299 | const inode_t *old_pi = cur->get_projected_inode(); | |
4300 | file_layout_t layout; | |
4301 | if (old_pi->has_layout()) | |
4302 | layout = old_pi->layout; | |
4303 | else if (dir_layout) | |
4304 | layout = *dir_layout; | |
4305 | else | |
4306 | layout = mdcache->default_file_layout; | |
4307 | ||
4308 | // Level of access required to complete | |
4309 | int access = MAY_WRITE; | |
4310 | ||
4311 | const auto old_layout = layout; | |
4312 | ||
4313 | if (req->head.args.setlayout.layout.fl_object_size > 0) | |
4314 | layout.object_size = req->head.args.setlayout.layout.fl_object_size; | |
4315 | if (req->head.args.setlayout.layout.fl_stripe_unit > 0) | |
4316 | layout.stripe_unit = req->head.args.setlayout.layout.fl_stripe_unit; | |
4317 | if (req->head.args.setlayout.layout.fl_stripe_count > 0) | |
4318 | layout.stripe_count=req->head.args.setlayout.layout.fl_stripe_count; | |
4319 | if (req->head.args.setlayout.layout.fl_pg_pool > 0) { | |
4320 | layout.pool_id = req->head.args.setlayout.layout.fl_pg_pool; | |
4321 | // make sure we have as new a map as the client | |
4322 | if (req->get_mdsmap_epoch() > mds->mdsmap->get_epoch()) { | |
4323 | mds->wait_for_mdsmap(req->get_mdsmap_epoch(), new C_MDS_RetryRequest(mdcache, mdr)); | |
4324 | return; | |
4325 | } | |
4326 | } | |
4327 | ||
4328 | if (layout != old_layout) { | |
4329 | access |= MAY_SET_VXATTR; | |
4330 | } | |
4331 | ||
4332 | if (!layout.is_valid()) { | |
4333 | dout(10) << "bad layout" << dendl; | |
4334 | respond_to_request(mdr, -EINVAL); | |
4335 | return; | |
4336 | } | |
4337 | if (!mds->mdsmap->is_data_pool(layout.pool_id)) { | |
4338 | dout(10) << " invalid data pool " << layout.pool_id << dendl; | |
4339 | respond_to_request(mdr, -EINVAL); | |
4340 | return; | |
4341 | } | |
4342 | ||
4343 | if (!check_access(mdr, cur, access)) | |
4344 | return; | |
4345 | ||
4346 | inode_t *pi = cur->project_inode(); | |
4347 | pi->layout = layout; | |
4348 | pi->version = cur->pre_dirty(); | |
4349 | ||
4350 | // log + wait | |
4351 | mdr->ls = mdlog->get_current_segment(); | |
4352 | EUpdate *le = new EUpdate(mdlog, "setlayout"); | |
4353 | mdlog->start_entry(le); | |
4354 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4355 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4356 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4357 | ||
4358 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4359 | } | |
4360 | ||
4361 | // XATTRS | |
4362 | ||
4363 | int Server::parse_layout_vxattr(string name, string value, const OSDMap& osdmap, | |
4364 | file_layout_t *layout, bool validate) | |
4365 | { | |
4366 | dout(20) << "parse_layout_vxattr name " << name << " value '" << value << "'" << dendl; | |
4367 | try { | |
4368 | if (name == "layout") { | |
4369 | string::iterator begin = value.begin(); | |
4370 | string::iterator end = value.end(); | |
4371 | keys_and_values<string::iterator> p; // create instance of parser | |
4372 | std::map<string, string> m; // map to receive results | |
4373 | if (!qi::parse(begin, end, p, m)) { // returns true if successful | |
4374 | return -EINVAL; | |
4375 | } | |
4376 | string left(begin, end); | |
4377 | dout(10) << " parsed " << m << " left '" << left << "'" << dendl; | |
4378 | if (begin != end) | |
4379 | return -EINVAL; | |
4380 | for (map<string,string>::iterator q = m.begin(); q != m.end(); ++q) { | |
4381 | // Skip validation on each attr, we do it once at the end (avoid | |
4382 | // rejecting intermediate states if the overall result is ok) | |
4383 | int r = parse_layout_vxattr(string("layout.") + q->first, q->second, | |
4384 | osdmap, layout, false); | |
4385 | if (r < 0) | |
4386 | return r; | |
4387 | } | |
4388 | } else if (name == "layout.object_size") { | |
4389 | layout->object_size = boost::lexical_cast<unsigned>(value); | |
4390 | } else if (name == "layout.stripe_unit") { | |
4391 | layout->stripe_unit = boost::lexical_cast<unsigned>(value); | |
4392 | } else if (name == "layout.stripe_count") { | |
4393 | layout->stripe_count = boost::lexical_cast<unsigned>(value); | |
4394 | } else if (name == "layout.pool") { | |
4395 | try { | |
4396 | layout->pool_id = boost::lexical_cast<unsigned>(value); | |
4397 | } catch (boost::bad_lexical_cast const&) { | |
4398 | int64_t pool = osdmap.lookup_pg_pool_name(value); | |
4399 | if (pool < 0) { | |
4400 | dout(10) << " unknown pool " << value << dendl; | |
4401 | return -ENOENT; | |
4402 | } | |
4403 | layout->pool_id = pool; | |
4404 | } | |
4405 | } else if (name == "layout.pool_namespace") { | |
4406 | layout->pool_ns = value; | |
4407 | } else { | |
4408 | dout(10) << " unknown layout vxattr " << name << dendl; | |
4409 | return -EINVAL; | |
4410 | } | |
4411 | } catch (boost::bad_lexical_cast const&) { | |
4412 | dout(10) << "bad vxattr value, unable to parse int for " << name << dendl; | |
4413 | return -EINVAL; | |
4414 | } | |
4415 | ||
4416 | if (validate && !layout->is_valid()) { | |
4417 | dout(10) << "bad layout" << dendl; | |
4418 | return -EINVAL; | |
4419 | } | |
4420 | if (!mds->mdsmap->is_data_pool(layout->pool_id)) { | |
4421 | dout(10) << " invalid data pool " << layout->pool_id << dendl; | |
4422 | return -EINVAL; | |
4423 | } | |
4424 | return 0; | |
4425 | } | |
4426 | ||
4427 | int Server::parse_quota_vxattr(string name, string value, quota_info_t *quota) | |
4428 | { | |
4429 | dout(20) << "parse_quota_vxattr name " << name << " value '" << value << "'" << dendl; | |
4430 | try { | |
4431 | if (name == "quota") { | |
4432 | string::iterator begin = value.begin(); | |
4433 | string::iterator end = value.end(); | |
4434 | keys_and_values<string::iterator> p; // create instance of parser | |
4435 | std::map<string, string> m; // map to receive results | |
4436 | if (!qi::parse(begin, end, p, m)) { // returns true if successful | |
4437 | return -EINVAL; | |
4438 | } | |
4439 | string left(begin, end); | |
4440 | dout(10) << " parsed " << m << " left '" << left << "'" << dendl; | |
4441 | if (begin != end) | |
4442 | return -EINVAL; | |
4443 | for (map<string,string>::iterator q = m.begin(); q != m.end(); ++q) { | |
4444 | int r = parse_quota_vxattr(string("quota.") + q->first, q->second, quota); | |
4445 | if (r < 0) | |
4446 | return r; | |
4447 | } | |
4448 | } else if (name == "quota.max_bytes") { | |
4449 | int64_t q = boost::lexical_cast<int64_t>(value); | |
4450 | if (q < 0) | |
4451 | return -EINVAL; | |
4452 | quota->max_bytes = q; | |
4453 | } else if (name == "quota.max_files") { | |
4454 | int64_t q = boost::lexical_cast<int64_t>(value); | |
4455 | if (q < 0) | |
4456 | return -EINVAL; | |
4457 | quota->max_files = q; | |
4458 | } else { | |
4459 | dout(10) << " unknown quota vxattr " << name << dendl; | |
4460 | return -EINVAL; | |
4461 | } | |
4462 | } catch (boost::bad_lexical_cast const&) { | |
4463 | dout(10) << "bad vxattr value, unable to parse int for " << name << dendl; | |
4464 | return -EINVAL; | |
4465 | } | |
4466 | ||
4467 | if (!quota->is_valid()) { | |
4468 | dout(10) << "bad quota" << dendl; | |
4469 | return -EINVAL; | |
4470 | } | |
4471 | return 0; | |
4472 | } | |
4473 | ||
4474 | /* | |
4475 | * Verify that the file layout attribute carried by client | |
4476 | * is well-formatted. | |
4477 | * Return 0 on success, otherwise this function takes | |
4478 | * responsibility for the passed mdr. | |
4479 | */ | |
4480 | int Server::check_layout_vxattr(MDRequestRef& mdr, | |
4481 | string name, | |
4482 | string value, | |
4483 | file_layout_t *layout) | |
4484 | { | |
4485 | MClientRequest *req = mdr->client_request; | |
4486 | epoch_t epoch; | |
4487 | int r; | |
4488 | ||
4489 | mds->objecter->with_osdmap([&](const OSDMap& osdmap) { | |
4490 | r = parse_layout_vxattr(name, value, osdmap, layout); | |
4491 | epoch = osdmap.get_epoch(); | |
4492 | }); | |
4493 | ||
4494 | if (r == -ENOENT) { | |
4495 | ||
4496 | // we don't have the specified pool, make sure our map | |
4497 | // is newer than or as new as the client. | |
4498 | epoch_t req_epoch = req->get_osdmap_epoch(); | |
4499 | ||
4500 | if (req_epoch > epoch) { | |
4501 | ||
4502 | // well, our map is older. consult mds. | |
4503 | Context *fin = new C_IO_Wrapper(mds, new C_MDS_RetryRequest(mdcache, mdr)); | |
4504 | ||
4505 | if (!mds->objecter->wait_for_map(req_epoch, fin)) | |
4506 | return r; // wait, fin will retry this request later | |
4507 | ||
4508 | delete fin; | |
4509 | ||
4510 | // now we have at least as new a map as the client, try again. | |
4511 | mds->objecter->with_osdmap([&](const OSDMap& osdmap) { | |
4512 | r = parse_layout_vxattr(name, value, osdmap, layout); | |
4513 | epoch = osdmap.get_epoch(); | |
4514 | }); | |
4515 | ||
4516 | assert(epoch >= req_epoch); // otherwise wait_for_map() told a lie | |
4517 | ||
4518 | } else if (req_epoch == 0 && !mdr->waited_for_osdmap) { | |
4519 | ||
4520 | // For compatibility with client w/ old code, we still need get the | |
4521 | // latest map. One day if COMPACT_VERSION of MClientRequest >=3, | |
4522 | // we can remove those code. | |
4523 | mdr->waited_for_osdmap = true; | |
4524 | mds->objecter->wait_for_latest_osdmap(new C_IO_Wrapper( | |
4525 | mds, new C_MDS_RetryRequest(mdcache, mdr))); | |
4526 | return r; | |
4527 | } | |
4528 | } | |
4529 | ||
4530 | if (r < 0) { | |
4531 | ||
4532 | if (r == -ENOENT) | |
4533 | r = -EINVAL; | |
4534 | ||
4535 | respond_to_request(mdr, r); | |
4536 | return r; | |
4537 | } | |
4538 | ||
4539 | // all is well | |
4540 | return 0; | |
4541 | } | |
4542 | ||
4543 | void Server::handle_set_vxattr(MDRequestRef& mdr, CInode *cur, | |
4544 | file_layout_t *dir_layout, | |
4545 | set<SimpleLock*> rdlocks, | |
4546 | set<SimpleLock*> wrlocks, | |
4547 | set<SimpleLock*> xlocks) | |
4548 | { | |
4549 | MClientRequest *req = mdr->client_request; | |
4550 | string name(req->get_path2()); | |
4551 | bufferlist bl = req->get_data(); | |
4552 | string value (bl.c_str(), bl.length()); | |
4553 | dout(10) << "handle_set_vxattr " << name | |
4554 | << " val " << value.length() | |
4555 | << " bytes on " << *cur | |
4556 | << dendl; | |
4557 | ||
4558 | inode_t *pi = NULL; | |
4559 | string rest; | |
4560 | ||
4561 | if (!check_access(mdr, cur, MAY_SET_VXATTR)) { | |
4562 | return; | |
4563 | } | |
4564 | ||
4565 | if (name.compare(0, 15, "ceph.dir.layout") == 0) { | |
4566 | if (!cur->is_dir()) { | |
4567 | respond_to_request(mdr, -EINVAL); | |
4568 | return; | |
4569 | } | |
4570 | ||
4571 | file_layout_t layout; | |
4572 | if (cur->get_projected_inode()->has_layout()) | |
4573 | layout = cur->get_projected_inode()->layout; | |
4574 | else if (dir_layout) | |
4575 | layout = *dir_layout; | |
4576 | else | |
4577 | layout = mdcache->default_file_layout; | |
4578 | ||
4579 | rest = name.substr(name.find("layout")); | |
4580 | if (check_layout_vxattr(mdr, rest, value, &layout) < 0) | |
4581 | return; | |
4582 | ||
4583 | xlocks.insert(&cur->policylock); | |
4584 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4585 | return; | |
4586 | ||
4587 | pi = cur->project_inode(); | |
4588 | pi->layout = layout; | |
4589 | } else if (name.compare(0, 16, "ceph.file.layout") == 0) { | |
4590 | if (!cur->is_file()) { | |
4591 | respond_to_request(mdr, -EINVAL); | |
4592 | return; | |
4593 | } | |
4594 | if (cur->get_projected_inode()->size || | |
4595 | cur->get_projected_inode()->truncate_seq > 1) { | |
4596 | respond_to_request(mdr, -ENOTEMPTY); | |
4597 | return; | |
4598 | } | |
4599 | file_layout_t layout = cur->get_projected_inode()->layout; | |
4600 | rest = name.substr(name.find("layout")); | |
4601 | if (check_layout_vxattr(mdr, rest, value, &layout) < 0) | |
4602 | return; | |
4603 | ||
4604 | xlocks.insert(&cur->filelock); | |
4605 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4606 | return; | |
4607 | ||
4608 | pi = cur->project_inode(); | |
4609 | int64_t old_pool = pi->layout.pool_id; | |
4610 | pi->add_old_pool(old_pool); | |
4611 | pi->layout = layout; | |
4612 | pi->ctime = mdr->get_op_stamp(); | |
4613 | } else if (name.compare(0, 10, "ceph.quota") == 0) { | |
4614 | if (!cur->is_dir() || cur->is_root()) { | |
4615 | respond_to_request(mdr, -EINVAL); | |
4616 | return; | |
4617 | } | |
4618 | ||
4619 | quota_info_t quota = cur->get_projected_inode()->quota; | |
4620 | ||
4621 | rest = name.substr(name.find("quota")); | |
4622 | int r = parse_quota_vxattr(rest, value, "a); | |
4623 | if (r < 0) { | |
4624 | respond_to_request(mdr, r); | |
4625 | return; | |
4626 | } | |
4627 | ||
4628 | xlocks.insert(&cur->policylock); | |
4629 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4630 | return; | |
4631 | ||
4632 | pi = cur->project_inode(); | |
4633 | pi->quota = quota; | |
4634 | } else if (name.find("ceph.dir.pin") == 0) { | |
4635 | if (!cur->is_dir() || cur->is_root()) { | |
4636 | respond_to_request(mdr, -EINVAL); | |
4637 | return; | |
4638 | } | |
4639 | ||
4640 | mds_rank_t rank; | |
4641 | try { | |
4642 | rank = boost::lexical_cast<mds_rank_t>(value); | |
4643 | if (rank < 0) rank = MDS_RANK_NONE; | |
4644 | } catch (boost::bad_lexical_cast const&) { | |
4645 | dout(10) << "bad vxattr value, unable to parse int for " << name << dendl; | |
4646 | respond_to_request(mdr, -EINVAL); | |
4647 | return; | |
4648 | } | |
4649 | ||
4650 | xlocks.insert(&cur->policylock); | |
4651 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4652 | return; | |
4653 | ||
4654 | pi = cur->project_inode(); | |
4655 | cur->set_export_pin(rank); | |
4656 | } else { | |
4657 | dout(10) << " unknown vxattr " << name << dendl; | |
4658 | respond_to_request(mdr, -EINVAL); | |
4659 | return; | |
4660 | } | |
4661 | ||
4662 | pi->change_attr++; | |
4663 | pi->ctime = mdr->get_op_stamp(); | |
4664 | pi->version = cur->pre_dirty(); | |
4665 | if (cur->is_file()) | |
4666 | pi->update_backtrace(); | |
4667 | ||
4668 | // log + wait | |
4669 | mdr->ls = mdlog->get_current_segment(); | |
4670 | EUpdate *le = new EUpdate(mdlog, "set vxattr layout"); | |
4671 | mdlog->start_entry(le); | |
4672 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4673 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4674 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4675 | ||
4676 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4677 | return; | |
4678 | } | |
4679 | ||
4680 | void Server::handle_remove_vxattr(MDRequestRef& mdr, CInode *cur, | |
4681 | file_layout_t *dir_layout, | |
4682 | set<SimpleLock*> rdlocks, | |
4683 | set<SimpleLock*> wrlocks, | |
4684 | set<SimpleLock*> xlocks) | |
4685 | { | |
4686 | MClientRequest *req = mdr->client_request; | |
4687 | string name(req->get_path2()); | |
4688 | ||
4689 | dout(10) << __func__ << " " << name << " on " << *cur << dendl; | |
4690 | ||
4691 | if (name == "ceph.dir.layout") { | |
4692 | if (!cur->is_dir()) { | |
4693 | respond_to_request(mdr, -ENODATA); | |
4694 | return; | |
4695 | } | |
4696 | if (cur->is_root()) { | |
4697 | dout(10) << "can't remove layout policy on the root directory" << dendl; | |
4698 | respond_to_request(mdr, -EINVAL); | |
4699 | return; | |
4700 | } | |
4701 | ||
4702 | if (!cur->get_projected_inode()->has_layout()) { | |
4703 | respond_to_request(mdr, -ENODATA); | |
4704 | return; | |
4705 | } | |
4706 | ||
4707 | xlocks.insert(&cur->policylock); | |
4708 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4709 | return; | |
4710 | ||
4711 | inode_t *pi = cur->project_inode(); | |
4712 | pi->clear_layout(); | |
4713 | pi->version = cur->pre_dirty(); | |
4714 | ||
4715 | // log + wait | |
4716 | mdr->ls = mdlog->get_current_segment(); | |
4717 | EUpdate *le = new EUpdate(mdlog, "remove dir layout vxattr"); | |
4718 | mdlog->start_entry(le); | |
4719 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4720 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4721 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4722 | ||
4723 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4724 | return; | |
4725 | } else if (name == "ceph.dir.layout.pool_namespace" | |
4726 | || name == "ceph.file.layout.pool_namespace") { | |
4727 | // Namespace is the only layout field that has a meaningful | |
4728 | // null/none value (empty string, means default layout). Is equivalent | |
4729 | // to a setxattr with empty string: pass through the empty payload of | |
4730 | // the rmxattr request to do this. | |
4731 | handle_set_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks); | |
4732 | return; | |
4733 | } | |
4734 | ||
4735 | respond_to_request(mdr, -ENODATA); | |
4736 | } | |
4737 | ||
4738 | class C_MDS_inode_xattr_update_finish : public ServerLogContext { | |
4739 | CInode *in; | |
4740 | public: | |
4741 | ||
4742 | C_MDS_inode_xattr_update_finish(Server *s, MDRequestRef& r, CInode *i) : | |
4743 | ServerLogContext(s, r), in(i) { } | |
4744 | void finish(int r) override { | |
4745 | assert(r == 0); | |
4746 | ||
4747 | // apply | |
4748 | in->pop_and_dirty_projected_inode(mdr->ls); | |
4749 | ||
4750 | mdr->apply(); | |
4751 | ||
4752 | get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR); | |
4753 | ||
4754 | server->respond_to_request(mdr, 0); | |
4755 | } | |
4756 | }; | |
4757 | ||
4758 | void Server::handle_client_setxattr(MDRequestRef& mdr) | |
4759 | { | |
4760 | MClientRequest *req = mdr->client_request; | |
4761 | string name(req->get_path2()); | |
4762 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
4763 | CInode *cur; | |
4764 | ||
4765 | file_layout_t *dir_layout = NULL; | |
4766 | if (name.compare(0, 15, "ceph.dir.layout") == 0) | |
4767 | cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout); | |
4768 | else | |
4769 | cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
4770 | if (!cur) | |
4771 | return; | |
4772 | ||
4773 | if (mdr->snapid != CEPH_NOSNAP) { | |
4774 | respond_to_request(mdr, -EROFS); | |
4775 | return; | |
4776 | } | |
4777 | ||
4778 | int flags = req->head.args.setxattr.flags; | |
4779 | ||
4780 | // magic ceph.* namespace? | |
4781 | if (name.compare(0, 5, "ceph.") == 0) { | |
4782 | handle_set_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks); | |
4783 | return; | |
4784 | } | |
4785 | ||
4786 | xlocks.insert(&cur->xattrlock); | |
4787 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4788 | return; | |
4789 | ||
4790 | if (!check_access(mdr, cur, MAY_WRITE)) | |
4791 | return; | |
4792 | ||
4793 | map<string, bufferptr> *pxattrs = cur->get_projected_xattrs(); | |
4794 | size_t len = req->get_data().length(); | |
4795 | size_t inc = len + name.length(); | |
4796 | ||
4797 | // check xattrs kv pairs size | |
4798 | size_t cur_xattrs_size = 0; | |
4799 | for (const auto& p : *pxattrs) { | |
4800 | if ((flags & CEPH_XATTR_REPLACE) && (name.compare(p.first) == 0)) { | |
4801 | continue; | |
4802 | } | |
4803 | cur_xattrs_size += p.first.length() + p.second.length(); | |
4804 | } | |
4805 | ||
4806 | if (((cur_xattrs_size + inc) > g_conf->mds_max_xattr_pairs_size)) { | |
4807 | dout(10) << "xattr kv pairs size too big. cur_xattrs_size " | |
4808 | << cur_xattrs_size << ", inc " << inc << dendl; | |
4809 | respond_to_request(mdr, -ENOSPC); | |
4810 | return; | |
4811 | } | |
4812 | ||
4813 | if ((flags & CEPH_XATTR_CREATE) && pxattrs->count(name)) { | |
4814 | dout(10) << "setxattr '" << name << "' XATTR_CREATE and EEXIST on " << *cur << dendl; | |
4815 | respond_to_request(mdr, -EEXIST); | |
4816 | return; | |
4817 | } | |
4818 | if ((flags & CEPH_XATTR_REPLACE) && !pxattrs->count(name)) { | |
4819 | dout(10) << "setxattr '" << name << "' XATTR_REPLACE and ENODATA on " << *cur << dendl; | |
4820 | respond_to_request(mdr, -ENODATA); | |
4821 | return; | |
4822 | } | |
4823 | ||
4824 | dout(10) << "setxattr '" << name << "' len " << len << " on " << *cur << dendl; | |
4825 | ||
4826 | // project update | |
4827 | map<string,bufferptr> *px = new map<string,bufferptr>; | |
4828 | inode_t *pi = cur->project_inode(px); | |
4829 | pi->version = cur->pre_dirty(); | |
4830 | pi->ctime = mdr->get_op_stamp(); | |
4831 | pi->change_attr++; | |
4832 | pi->xattr_version++; | |
4833 | px->erase(name); | |
4834 | if (!(flags & CEPH_XATTR_REMOVE)) { | |
4835 | (*px)[name] = buffer::create(len); | |
4836 | if (len) | |
4837 | req->get_data().copy(0, len, (*px)[name].c_str()); | |
4838 | } | |
4839 | ||
4840 | // log + wait | |
4841 | mdr->ls = mdlog->get_current_segment(); | |
4842 | EUpdate *le = new EUpdate(mdlog, "setxattr"); | |
4843 | mdlog->start_entry(le); | |
4844 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4845 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4846 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4847 | ||
4848 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4849 | } | |
4850 | ||
4851 | void Server::handle_client_removexattr(MDRequestRef& mdr) | |
4852 | { | |
4853 | MClientRequest *req = mdr->client_request; | |
4854 | string name(req->get_path2()); | |
4855 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
4856 | file_layout_t *dir_layout = NULL; | |
4857 | CInode *cur; | |
4858 | if (name == "ceph.dir.layout") | |
4859 | cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true, false, &dir_layout); | |
4860 | else | |
4861 | cur = rdlock_path_pin_ref(mdr, 0, rdlocks, true); | |
4862 | if (!cur) | |
4863 | return; | |
4864 | ||
4865 | if (mdr->snapid != CEPH_NOSNAP) { | |
4866 | respond_to_request(mdr, -EROFS); | |
4867 | return; | |
4868 | } | |
4869 | ||
4870 | if (name.compare(0, 5, "ceph.") == 0) { | |
4871 | handle_remove_vxattr(mdr, cur, dir_layout, rdlocks, wrlocks, xlocks); | |
4872 | return; | |
4873 | } | |
4874 | ||
4875 | xlocks.insert(&cur->xattrlock); | |
4876 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4877 | return; | |
4878 | ||
4879 | map<string, bufferptr> *pxattrs = cur->get_projected_xattrs(); | |
4880 | if (pxattrs->count(name) == 0) { | |
4881 | dout(10) << "removexattr '" << name << "' and ENODATA on " << *cur << dendl; | |
4882 | respond_to_request(mdr, -ENODATA); | |
4883 | return; | |
4884 | } | |
4885 | ||
4886 | dout(10) << "removexattr '" << name << "' on " << *cur << dendl; | |
4887 | ||
4888 | // project update | |
4889 | map<string,bufferptr> *px = new map<string,bufferptr>; | |
4890 | inode_t *pi = cur->project_inode(px); | |
4891 | pi->version = cur->pre_dirty(); | |
4892 | pi->ctime = mdr->get_op_stamp(); | |
4893 | pi->change_attr++; | |
4894 | pi->xattr_version++; | |
4895 | px->erase(name); | |
4896 | ||
4897 | // log + wait | |
4898 | mdr->ls = mdlog->get_current_segment(); | |
4899 | EUpdate *le = new EUpdate(mdlog, "removexattr"); | |
4900 | mdlog->start_entry(le); | |
4901 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
4902 | mdcache->predirty_journal_parents(mdr, &le->metablob, cur, 0, PREDIRTY_PRIMARY); | |
4903 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, cur); | |
4904 | ||
4905 | journal_and_reply(mdr, cur, 0, le, new C_MDS_inode_update_finish(this, mdr, cur)); | |
4906 | } | |
4907 | ||
4908 | ||
4909 | // ================================================================= | |
4910 | // DIRECTORY and NAMESPACE OPS | |
4911 | ||
4912 | ||
4913 | // ------------------------------------------------ | |
4914 | ||
4915 | // MKNOD | |
4916 | ||
4917 | class C_MDS_mknod_finish : public ServerLogContext { | |
4918 | CDentry *dn; | |
4919 | CInode *newi; | |
4920 | public: | |
4921 | C_MDS_mknod_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ni) : | |
4922 | ServerLogContext(s, r), dn(d), newi(ni) {} | |
4923 | void finish(int r) override { | |
4924 | assert(r == 0); | |
4925 | ||
4926 | // link the inode | |
4927 | dn->pop_projected_linkage(); | |
4928 | ||
4929 | // be a bit hacky with the inode version, here.. we decrement it | |
4930 | // just to keep mark_dirty() happen. (we didn't bother projecting | |
4931 | // a new version of hte inode since it's just been created) | |
4932 | newi->inode.version--; | |
4933 | newi->mark_dirty(newi->inode.version + 1, mdr->ls); | |
4934 | newi->_mark_dirty_parent(mdr->ls, true); | |
4935 | ||
4936 | // mkdir? | |
4937 | if (newi->inode.is_dir()) { | |
4938 | CDir *dir = newi->get_dirfrag(frag_t()); | |
4939 | assert(dir); | |
4940 | dir->fnode.version--; | |
4941 | dir->mark_dirty(dir->fnode.version + 1, mdr->ls); | |
4942 | dir->mark_new(mdr->ls); | |
4943 | } | |
4944 | ||
4945 | mdr->apply(); | |
4946 | ||
4947 | MDRequestRef null_ref; | |
4948 | get_mds()->mdcache->send_dentry_link(dn, null_ref); | |
4949 | ||
4950 | if (newi->inode.is_file()) | |
4951 | get_mds()->locker->share_inode_max_size(newi); | |
4952 | ||
4953 | // hit pop | |
4954 | get_mds()->balancer->hit_inode(mdr->get_mds_stamp(), newi, META_POP_IWR); | |
4955 | ||
4956 | // reply | |
4957 | server->respond_to_request(mdr, 0); | |
4958 | } | |
4959 | }; | |
4960 | ||
4961 | ||
4962 | void Server::handle_client_mknod(MDRequestRef& mdr) | |
4963 | { | |
4964 | MClientRequest *req = mdr->client_request; | |
4965 | client_t client = mdr->get_client(); | |
4966 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
4967 | file_layout_t *dir_layout = NULL; | |
4968 | CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false, | |
4969 | &dir_layout); | |
4970 | if (!dn) return; | |
4971 | if (mdr->snapid != CEPH_NOSNAP) { | |
4972 | respond_to_request(mdr, -EROFS); | |
4973 | return; | |
4974 | } | |
4975 | CInode *diri = dn->get_dir()->get_inode(); | |
4976 | rdlocks.insert(&diri->authlock); | |
4977 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
4978 | return; | |
4979 | ||
4980 | if (!check_access(mdr, diri, MAY_WRITE)) | |
4981 | return; | |
4982 | ||
4983 | if (!check_fragment_space(mdr, dn->get_dir())) | |
4984 | return; | |
4985 | ||
4986 | unsigned mode = req->head.args.mknod.mode; | |
4987 | if ((mode & S_IFMT) == 0) | |
4988 | mode |= S_IFREG; | |
4989 | ||
4990 | // set layout | |
4991 | file_layout_t layout; | |
4992 | if (dir_layout && S_ISREG(mode)) | |
4993 | layout = *dir_layout; | |
4994 | else | |
4995 | layout = mdcache->default_file_layout; | |
4996 | ||
4997 | SnapRealm *realm = dn->get_dir()->inode->find_snaprealm(); | |
4998 | snapid_t follows = realm->get_newest_seq(); | |
4999 | CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), | |
5000 | mode, &layout); | |
5001 | assert(newi); | |
5002 | ||
5003 | dn->push_projected_linkage(newi); | |
5004 | ||
5005 | newi->inode.rdev = req->head.args.mknod.rdev; | |
5006 | newi->inode.version = dn->pre_dirty(); | |
5007 | newi->inode.rstat.rfiles = 1; | |
5008 | if (layout.pool_id != mdcache->default_file_layout.pool_id) | |
5009 | newi->inode.add_old_pool(mdcache->default_file_layout.pool_id); | |
5010 | newi->inode.update_backtrace(); | |
5011 | ||
5012 | // if the client created a _regular_ file via MKNOD, it's highly likely they'll | |
5013 | // want to write to it (e.g., if they are reexporting NFS) | |
5014 | if (S_ISREG(newi->inode.mode)) { | |
5015 | dout(15) << " setting a client_range too, since this is a regular file" << dendl; | |
5016 | newi->inode.client_ranges[client].range.first = 0; | |
5017 | newi->inode.client_ranges[client].range.last = newi->inode.get_layout_size_increment(); | |
5018 | newi->inode.client_ranges[client].follows = follows; | |
5019 | ||
5020 | // issue a cap on the file | |
5021 | int cmode = CEPH_FILE_MODE_RDWR; | |
5022 | Capability *cap = mds->locker->issue_new_caps(newi, cmode, mdr->session, realm, req->is_replay()); | |
5023 | if (cap) { | |
5024 | cap->set_wanted(0); | |
5025 | ||
5026 | // put locks in excl mode | |
5027 | newi->filelock.set_state(LOCK_EXCL); | |
5028 | newi->authlock.set_state(LOCK_EXCL); | |
5029 | newi->xattrlock.set_state(LOCK_EXCL); | |
5030 | } | |
5031 | } | |
5032 | ||
5033 | assert(dn->first == follows + 1); | |
5034 | newi->first = dn->first; | |
5035 | ||
5036 | dout(10) << "mknod mode " << newi->inode.mode << " rdev " << newi->inode.rdev << dendl; | |
5037 | ||
5038 | // prepare finisher | |
5039 | mdr->ls = mdlog->get_current_segment(); | |
5040 | EUpdate *le = new EUpdate(mdlog, "mknod"); | |
5041 | mdlog->start_entry(le); | |
5042 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
5043 | journal_allocated_inos(mdr, &le->metablob); | |
5044 | ||
5045 | mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(), | |
5046 | PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
5047 | le->metablob.add_primary_dentry(dn, newi, true, true, true); | |
5048 | ||
5049 | journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi)); | |
5050 | } | |
5051 | ||
5052 | ||
5053 | ||
5054 | // MKDIR | |
5055 | /* This function takes responsibility for the passed mdr*/ | |
5056 | void Server::handle_client_mkdir(MDRequestRef& mdr) | |
5057 | { | |
5058 | MClientRequest *req = mdr->client_request; | |
5059 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
5060 | CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false); | |
5061 | if (!dn) return; | |
5062 | if (mdr->snapid != CEPH_NOSNAP) { | |
5063 | respond_to_request(mdr, -EROFS); | |
5064 | return; | |
5065 | } | |
5066 | CDir *dir = dn->get_dir(); | |
5067 | CInode *diri = dir->get_inode(); | |
5068 | rdlocks.insert(&diri->authlock); | |
5069 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
5070 | return; | |
5071 | ||
5072 | // mkdir check access | |
5073 | if (!check_access(mdr, diri, MAY_WRITE)) | |
5074 | return; | |
5075 | ||
5076 | if (!check_fragment_space(mdr, dir)) | |
5077 | return; | |
5078 | ||
5079 | // new inode | |
5080 | SnapRealm *realm = dn->get_dir()->inode->find_snaprealm(); | |
5081 | snapid_t follows = realm->get_newest_seq(); | |
5082 | ||
5083 | unsigned mode = req->head.args.mkdir.mode; | |
5084 | mode &= ~S_IFMT; | |
5085 | mode |= S_IFDIR; | |
5086 | CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), mode); | |
5087 | assert(newi); | |
5088 | ||
5089 | // it's a directory. | |
5090 | dn->push_projected_linkage(newi); | |
5091 | ||
5092 | newi->inode.version = dn->pre_dirty(); | |
5093 | newi->inode.rstat.rsubdirs = 1; | |
5094 | newi->inode.update_backtrace(); | |
5095 | ||
5096 | dout(12) << " follows " << follows << dendl; | |
5097 | assert(dn->first == follows + 1); | |
5098 | newi->first = dn->first; | |
5099 | ||
5100 | // ...and that new dir is empty. | |
5101 | CDir *newdir = newi->get_or_open_dirfrag(mdcache, frag_t()); | |
5102 | newdir->state_set(CDir::STATE_CREATING); | |
5103 | newdir->mark_complete(); | |
5104 | newdir->fnode.version = newdir->pre_dirty(); | |
5105 | ||
5106 | // prepare finisher | |
5107 | mdr->ls = mdlog->get_current_segment(); | |
5108 | EUpdate *le = new EUpdate(mdlog, "mkdir"); | |
5109 | mdlog->start_entry(le); | |
5110 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
5111 | journal_allocated_inos(mdr, &le->metablob); | |
5112 | mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
5113 | le->metablob.add_primary_dentry(dn, newi, true, true); | |
5114 | le->metablob.add_new_dir(newdir); // dirty AND complete AND new | |
5115 | ||
5116 | // issue a cap on the directory | |
5117 | int cmode = CEPH_FILE_MODE_RDWR; | |
5118 | Capability *cap = mds->locker->issue_new_caps(newi, cmode, mdr->session, realm, req->is_replay()); | |
5119 | if (cap) { | |
5120 | cap->set_wanted(0); | |
5121 | ||
5122 | // put locks in excl mode | |
5123 | newi->filelock.set_state(LOCK_EXCL); | |
5124 | newi->authlock.set_state(LOCK_EXCL); | |
5125 | newi->xattrlock.set_state(LOCK_EXCL); | |
5126 | } | |
5127 | ||
5128 | // make sure this inode gets into the journal | |
5129 | le->metablob.add_opened_ino(newi->ino()); | |
5130 | LogSegment *ls = mds->mdlog->get_current_segment(); | |
5131 | ls->open_files.push_back(&newi->item_open_file); | |
5132 | ||
5133 | journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi)); | |
5134 | } | |
5135 | ||
5136 | ||
5137 | // SYMLINK | |
5138 | ||
5139 | void Server::handle_client_symlink(MDRequestRef& mdr) | |
5140 | { | |
5141 | MClientRequest *req = mdr->client_request; | |
5142 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
5143 | CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false); | |
5144 | if (!dn) return; | |
5145 | if (mdr->snapid != CEPH_NOSNAP) { | |
5146 | respond_to_request(mdr, -EROFS); | |
5147 | return; | |
5148 | } | |
5149 | CDir *dir = dn->get_dir(); | |
5150 | CInode *diri = dir->get_inode(); | |
5151 | rdlocks.insert(&diri->authlock); | |
5152 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
5153 | return; | |
5154 | ||
5155 | if (!check_access(mdr, diri, MAY_WRITE)) | |
5156 | return; | |
5157 | ||
5158 | if (!check_fragment_space(mdr, dir)) | |
5159 | return; | |
5160 | ||
5161 | unsigned mode = S_IFLNK | 0777; | |
5162 | CInode *newi = prepare_new_inode(mdr, dn->get_dir(), inodeno_t(req->head.ino), mode); | |
5163 | assert(newi); | |
5164 | ||
5165 | // it's a symlink | |
5166 | dn->push_projected_linkage(newi); | |
5167 | ||
5168 | newi->symlink = req->get_path2(); | |
5169 | newi->inode.size = newi->symlink.length(); | |
5170 | newi->inode.rstat.rbytes = newi->inode.size; | |
5171 | newi->inode.rstat.rfiles = 1; | |
5172 | newi->inode.version = dn->pre_dirty(); | |
5173 | newi->inode.update_backtrace(); | |
5174 | ||
5175 | newi->first = dn->first; | |
5176 | ||
5177 | // prepare finisher | |
5178 | mdr->ls = mdlog->get_current_segment(); | |
5179 | EUpdate *le = new EUpdate(mdlog, "symlink"); | |
5180 | mdlog->start_entry(le); | |
5181 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
5182 | journal_allocated_inos(mdr, &le->metablob); | |
5183 | mdcache->predirty_journal_parents(mdr, &le->metablob, newi, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
5184 | le->metablob.add_primary_dentry(dn, newi, true, true); | |
5185 | ||
5186 | journal_and_reply(mdr, newi, dn, le, new C_MDS_mknod_finish(this, mdr, dn, newi)); | |
5187 | } | |
5188 | ||
5189 | ||
5190 | ||
5191 | ||
5192 | ||
5193 | // LINK | |
5194 | ||
5195 | void Server::handle_client_link(MDRequestRef& mdr) | |
5196 | { | |
5197 | MClientRequest *req = mdr->client_request; | |
5198 | ||
5199 | dout(7) << "handle_client_link " << req->get_filepath() | |
5200 | << " to " << req->get_filepath2() | |
5201 | << dendl; | |
5202 | ||
5203 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
5204 | ||
5205 | CDentry *dn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, false, false, false); | |
5206 | if (!dn) return; | |
5207 | CInode *targeti = rdlock_path_pin_ref(mdr, 1, rdlocks, false); | |
5208 | if (!targeti) return; | |
5209 | if (mdr->snapid != CEPH_NOSNAP) { | |
5210 | respond_to_request(mdr, -EROFS); | |
5211 | return; | |
5212 | } | |
5213 | ||
5214 | CDir *dir = dn->get_dir(); | |
5215 | dout(7) << "handle_client_link link " << dn->get_name() << " in " << *dir << dendl; | |
5216 | dout(7) << "target is " << *targeti << dendl; | |
5217 | if (targeti->is_dir()) { | |
5218 | dout(7) << "target is a dir, failing..." << dendl; | |
5219 | respond_to_request(mdr, -EINVAL); | |
5220 | return; | |
5221 | } | |
5222 | ||
5223 | xlocks.insert(&targeti->linklock); | |
5224 | ||
5225 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
5226 | return; | |
5227 | ||
5228 | if ((!mdr->has_more() || mdr->more()->witnessed.empty())) { | |
5229 | if (!check_access(mdr, targeti, MAY_WRITE)) | |
5230 | return; | |
5231 | ||
5232 | if (!check_access(mdr, dir->get_inode(), MAY_WRITE)) | |
5233 | return; | |
5234 | ||
5235 | if (!check_fragment_space(mdr, dir)) | |
5236 | return; | |
5237 | } | |
5238 | ||
5239 | // go! | |
5240 | assert(g_conf->mds_kill_link_at != 1); | |
5241 | ||
5242 | // local or remote? | |
5243 | if (targeti->is_auth()) | |
5244 | _link_local(mdr, dn, targeti); | |
5245 | else | |
5246 | _link_remote(mdr, true, dn, targeti); | |
5247 | } | |
5248 | ||
5249 | ||
5250 | class C_MDS_link_local_finish : public ServerLogContext { | |
5251 | CDentry *dn; | |
5252 | CInode *targeti; | |
5253 | version_t dnpv; | |
5254 | version_t tipv; | |
5255 | public: | |
5256 | C_MDS_link_local_finish(Server *s, MDRequestRef& r, CDentry *d, CInode *ti, | |
5257 | version_t dnpv_, version_t tipv_) : | |
5258 | ServerLogContext(s, r), dn(d), targeti(ti), | |
5259 | dnpv(dnpv_), tipv(tipv_) { } | |
5260 | void finish(int r) override { | |
5261 | assert(r == 0); | |
5262 | server->_link_local_finish(mdr, dn, targeti, dnpv, tipv); | |
5263 | } | |
5264 | }; | |
5265 | ||
5266 | ||
5267 | void Server::_link_local(MDRequestRef& mdr, CDentry *dn, CInode *targeti) | |
5268 | { | |
5269 | dout(10) << "_link_local " << *dn << " to " << *targeti << dendl; | |
5270 | ||
5271 | mdr->ls = mdlog->get_current_segment(); | |
5272 | ||
5273 | // predirty NEW dentry | |
5274 | version_t dnpv = dn->pre_dirty(); | |
5275 | version_t tipv = targeti->pre_dirty(); | |
5276 | ||
5277 | // project inode update | |
5278 | inode_t *pi = targeti->project_inode(); | |
5279 | pi->nlink++; | |
5280 | pi->ctime = mdr->get_op_stamp(); | |
5281 | pi->change_attr++; | |
5282 | pi->version = tipv; | |
5283 | ||
5284 | // log + wait | |
5285 | EUpdate *le = new EUpdate(mdlog, "link_local"); | |
5286 | mdlog->start_entry(le); | |
5287 | le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid()); | |
5288 | mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, 1); // new dn | |
5289 | mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, 0, PREDIRTY_PRIMARY); // targeti | |
5290 | le->metablob.add_remote_dentry(dn, true, targeti->ino(), targeti->d_type()); // new remote | |
5291 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, targeti); | |
5292 | ||
5293 | // do this after predirty_*, to avoid funky extra dnl arg | |
5294 | dn->push_projected_linkage(targeti->ino(), targeti->d_type()); | |
5295 | ||
5296 | journal_and_reply(mdr, targeti, dn, le, new C_MDS_link_local_finish(this, mdr, dn, targeti, dnpv, tipv)); | |
5297 | } | |
5298 | ||
5299 | void Server::_link_local_finish(MDRequestRef& mdr, CDentry *dn, CInode *targeti, | |
5300 | version_t dnpv, version_t tipv) | |
5301 | { | |
5302 | dout(10) << "_link_local_finish " << *dn << " to " << *targeti << dendl; | |
5303 | ||
5304 | // link and unlock the NEW dentry | |
31f18b77 FG |
5305 | CDentry::linkage_t *dnl = dn->pop_projected_linkage(); |
5306 | if (!dnl->get_inode()) | |
5307 | dn->link_remote(dnl, targeti); | |
7c673cae FG |
5308 | dn->mark_dirty(dnpv, mdr->ls); |
5309 | ||
5310 | // target inode | |
5311 | targeti->pop_and_dirty_projected_inode(mdr->ls); | |
5312 | ||
5313 | mdr->apply(); | |
5314 | ||
5315 | MDRequestRef null_ref; | |
5316 | mdcache->send_dentry_link(dn, null_ref); | |
5317 | ||
5318 | // bump target popularity | |
5319 | mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR); | |
5320 | mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR); | |
5321 | ||
5322 | // reply | |
5323 | respond_to_request(mdr, 0); | |
5324 | } | |
5325 | ||
5326 | ||
5327 | // link / unlink remote | |
5328 | ||
5329 | class C_MDS_link_remote_finish : public ServerLogContext { | |
5330 | bool inc; | |
5331 | CDentry *dn; | |
5332 | CInode *targeti; | |
5333 | version_t dpv; | |
5334 | public: | |
5335 | C_MDS_link_remote_finish(Server *s, MDRequestRef& r, bool i, CDentry *d, CInode *ti) : | |
5336 | ServerLogContext(s, r), inc(i), dn(d), targeti(ti), | |
5337 | dpv(d->get_projected_version()) {} | |
5338 | void finish(int r) override { | |
5339 | assert(r == 0); | |
5340 | server->_link_remote_finish(mdr, inc, dn, targeti, dpv); | |
5341 | } | |
5342 | }; | |
5343 | ||
5344 | void Server::_link_remote(MDRequestRef& mdr, bool inc, CDentry *dn, CInode *targeti) | |
5345 | { | |
5346 | dout(10) << "_link_remote " | |
5347 | << (inc ? "link ":"unlink ") | |
5348 | << *dn << " to " << *targeti << dendl; | |
5349 | ||
5350 | // 1. send LinkPrepare to dest (journal nlink++ prepare) | |
5351 | mds_rank_t linkauth = targeti->authority().first; | |
5352 | if (mdr->more()->witnessed.count(linkauth) == 0) { | |
5353 | if (mds->is_cluster_degraded() && | |
5354 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(linkauth)) { | |
5355 | dout(10) << " targeti auth mds." << linkauth << " is not active" << dendl; | |
5356 | if (mdr->more()->waiting_on_slave.empty()) | |
5357 | mds->wait_for_active_peer(linkauth, new C_MDS_RetryRequest(mdcache, mdr)); | |
5358 | return; | |
5359 | } | |
5360 | ||
5361 | dout(10) << " targeti auth must prepare nlink++/--" << dendl; | |
5362 | int op; | |
5363 | if (inc) | |
5364 | op = MMDSSlaveRequest::OP_LINKPREP; | |
5365 | else | |
5366 | op = MMDSSlaveRequest::OP_UNLINKPREP; | |
5367 | MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, op); | |
5368 | targeti->set_object_info(req->get_object_info()); | |
5369 | req->op_stamp = mdr->get_op_stamp(); | |
5370 | mds->send_message_mds(req, linkauth); | |
5371 | ||
5372 | assert(mdr->more()->waiting_on_slave.count(linkauth) == 0); | |
5373 | mdr->more()->waiting_on_slave.insert(linkauth); | |
5374 | return; | |
5375 | } | |
5376 | dout(10) << " targeti auth has prepared nlink++/--" << dendl; | |
5377 | ||
5378 | assert(g_conf->mds_kill_link_at != 2); | |
5379 | ||
5380 | mdr->set_mds_stamp(ceph_clock_now()); | |
5381 | ||
5382 | // add to event | |
5383 | mdr->ls = mdlog->get_current_segment(); | |
5384 | EUpdate *le = new EUpdate(mdlog, inc ? "link_remote":"unlink_remote"); | |
5385 | mdlog->start_entry(le); | |
5386 | le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid()); | |
5387 | if (!mdr->more()->witnessed.empty()) { | |
5388 | dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl; | |
5389 | le->reqid = mdr->reqid; | |
5390 | le->had_slaves = true; | |
5391 | mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed); | |
5392 | } | |
5393 | ||
5394 | if (inc) { | |
5395 | dn->pre_dirty(); | |
5396 | mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, 1); | |
5397 | le->metablob.add_remote_dentry(dn, true, targeti->ino(), targeti->d_type()); // new remote | |
5398 | dn->push_projected_linkage(targeti->ino(), targeti->d_type()); | |
5399 | } else { | |
5400 | dn->pre_dirty(); | |
5401 | mdcache->predirty_journal_parents(mdr, &le->metablob, targeti, dn->get_dir(), PREDIRTY_DIR, -1); | |
5402 | mdcache->journal_cow_dentry(mdr.get(), &le->metablob, dn); | |
5403 | le->metablob.add_null_dentry(dn, true); | |
31f18b77 | 5404 | dn->push_projected_linkage(); |
7c673cae FG |
5405 | } |
5406 | ||
5407 | journal_and_reply(mdr, targeti, dn, le, new C_MDS_link_remote_finish(this, mdr, inc, dn, targeti)); | |
5408 | } | |
5409 | ||
5410 | void Server::_link_remote_finish(MDRequestRef& mdr, bool inc, | |
5411 | CDentry *dn, CInode *targeti, | |
5412 | version_t dpv) | |
5413 | { | |
5414 | dout(10) << "_link_remote_finish " | |
5415 | << (inc ? "link ":"unlink ") | |
5416 | << *dn << " to " << *targeti << dendl; | |
5417 | ||
5418 | assert(g_conf->mds_kill_link_at != 3); | |
5419 | ||
5420 | if (!mdr->more()->witnessed.empty()) | |
5421 | mdcache->logged_master_update(mdr->reqid); | |
5422 | ||
5423 | if (inc) { | |
5424 | // link the new dentry | |
31f18b77 FG |
5425 | CDentry::linkage_t *dnl = dn->pop_projected_linkage(); |
5426 | if (!dnl->get_inode()) | |
5427 | dn->link_remote(dnl, targeti); | |
7c673cae FG |
5428 | dn->mark_dirty(dpv, mdr->ls); |
5429 | } else { | |
5430 | // unlink main dentry | |
5431 | dn->get_dir()->unlink_inode(dn); | |
31f18b77 | 5432 | dn->pop_projected_linkage(); |
7c673cae FG |
5433 | dn->mark_dirty(dn->get_projected_version(), mdr->ls); // dirty old dentry |
5434 | } | |
5435 | ||
5436 | mdr->apply(); | |
5437 | ||
5438 | MDRequestRef null_ref; | |
5439 | if (inc) | |
5440 | mdcache->send_dentry_link(dn, null_ref); | |
5441 | else | |
5442 | mdcache->send_dentry_unlink(dn, NULL, null_ref); | |
5443 | ||
5444 | // bump target popularity | |
5445 | mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR); | |
5446 | mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR); | |
5447 | ||
5448 | // reply | |
5449 | respond_to_request(mdr, 0); | |
5450 | ||
5451 | if (!inc) | |
5452 | // removing a new dn? | |
5453 | dn->get_dir()->try_remove_unlinked_dn(dn); | |
5454 | } | |
5455 | ||
5456 | ||
5457 | // remote linking/unlinking | |
5458 | ||
5459 | class C_MDS_SlaveLinkPrep : public ServerLogContext { | |
5460 | CInode *targeti; | |
5461 | public: | |
5462 | C_MDS_SlaveLinkPrep(Server *s, MDRequestRef& r, CInode *t) : | |
5463 | ServerLogContext(s, r), targeti(t) { } | |
5464 | void finish(int r) override { | |
5465 | assert(r == 0); | |
5466 | server->_logged_slave_link(mdr, targeti); | |
5467 | } | |
5468 | }; | |
5469 | ||
5470 | class C_MDS_SlaveLinkCommit : public ServerContext { | |
5471 | MDRequestRef mdr; | |
5472 | CInode *targeti; | |
5473 | public: | |
5474 | C_MDS_SlaveLinkCommit(Server *s, MDRequestRef& r, CInode *t) : | |
5475 | ServerContext(s), mdr(r), targeti(t) { } | |
5476 | void finish(int r) override { | |
5477 | server->_commit_slave_link(mdr, r, targeti); | |
5478 | } | |
5479 | }; | |
5480 | ||
5481 | /* This function DOES put the mdr->slave_request before returning*/ | |
5482 | void Server::handle_slave_link_prep(MDRequestRef& mdr) | |
5483 | { | |
5484 | dout(10) << "handle_slave_link_prep " << *mdr | |
5485 | << " on " << mdr->slave_request->get_object_info() | |
5486 | << dendl; | |
5487 | ||
5488 | assert(g_conf->mds_kill_link_at != 4); | |
5489 | ||
5490 | CInode *targeti = mdcache->get_inode(mdr->slave_request->get_object_info().ino); | |
5491 | assert(targeti); | |
5492 | dout(10) << "targeti " << *targeti << dendl; | |
5493 | CDentry *dn = targeti->get_parent_dn(); | |
5494 | CDentry::linkage_t *dnl = dn->get_linkage(); | |
5495 | assert(dnl->is_primary()); | |
5496 | ||
5497 | mdr->set_op_stamp(mdr->slave_request->op_stamp); | |
5498 | ||
5499 | mdr->auth_pin(targeti); | |
5500 | ||
5501 | //ceph_abort(); // test hack: make sure master can handle a slave that fails to prepare... | |
5502 | assert(g_conf->mds_kill_link_at != 5); | |
5503 | ||
5504 | // journal it | |
5505 | mdr->ls = mdlog->get_current_segment(); | |
5506 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_prep", mdr->reqid, mdr->slave_to_mds, | |
5507 | ESlaveUpdate::OP_PREPARE, ESlaveUpdate::LINK); | |
5508 | mdlog->start_entry(le); | |
5509 | ||
5510 | inode_t *pi = dnl->get_inode()->project_inode(); | |
5511 | ||
5512 | // update journaled target inode | |
5513 | bool inc; | |
5514 | if (mdr->slave_request->get_op() == MMDSSlaveRequest::OP_LINKPREP) { | |
5515 | inc = true; | |
5516 | pi->nlink++; | |
5517 | } else { | |
5518 | inc = false; | |
5519 | pi->nlink--; | |
5520 | } | |
5521 | ||
5522 | link_rollback rollback; | |
5523 | rollback.reqid = mdr->reqid; | |
5524 | rollback.ino = targeti->ino(); | |
5525 | rollback.old_ctime = targeti->inode.ctime; // we hold versionlock xlock; no concorrent projections | |
5526 | const fnode_t *pf = targeti->get_parent_dn()->get_dir()->get_projected_fnode(); | |
5527 | rollback.old_dir_mtime = pf->fragstat.mtime; | |
5528 | rollback.old_dir_rctime = pf->rstat.rctime; | |
5529 | rollback.was_inc = inc; | |
5530 | ::encode(rollback, le->rollback); | |
5531 | mdr->more()->rollback_bl = le->rollback; | |
5532 | ||
5533 | pi->ctime = mdr->get_op_stamp(); | |
5534 | pi->version = targeti->pre_dirty(); | |
5535 | ||
5536 | dout(10) << " projected inode " << pi << " v " << pi->version << dendl; | |
5537 | ||
5538 | // commit case | |
5539 | mdcache->predirty_journal_parents(mdr, &le->commit, dnl->get_inode(), 0, PREDIRTY_SHALLOW|PREDIRTY_PRIMARY); | |
5540 | mdcache->journal_dirty_inode(mdr.get(), &le->commit, targeti); | |
5541 | ||
5542 | // set up commit waiter | |
5543 | mdr->more()->slave_commit = new C_MDS_SlaveLinkCommit(this, mdr, targeti); | |
5544 | ||
5545 | mdr->more()->slave_update_journaled = true; | |
5546 | submit_mdlog_entry(le, new C_MDS_SlaveLinkPrep(this, mdr, targeti), | |
5547 | mdr, __func__); | |
5548 | mdlog->flush(); | |
5549 | } | |
5550 | ||
5551 | void Server::_logged_slave_link(MDRequestRef& mdr, CInode *targeti) | |
5552 | { | |
5553 | dout(10) << "_logged_slave_link " << *mdr | |
5554 | << " " << *targeti << dendl; | |
5555 | ||
5556 | assert(g_conf->mds_kill_link_at != 6); | |
5557 | ||
5558 | // update the target | |
5559 | targeti->pop_and_dirty_projected_inode(mdr->ls); | |
5560 | mdr->apply(); | |
5561 | ||
5562 | // hit pop | |
5563 | mds->balancer->hit_inode(mdr->get_mds_stamp(), targeti, META_POP_IWR); | |
5564 | ||
5565 | // done. | |
5566 | mdr->slave_request->put(); | |
5567 | mdr->slave_request = 0; | |
5568 | ||
5569 | // ack | |
5570 | if (!mdr->aborted) { | |
5571 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
5572 | MMDSSlaveRequest::OP_LINKPREPACK); | |
5573 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
5574 | } else { | |
5575 | dout(10) << " abort flag set, finishing" << dendl; | |
5576 | mdcache->request_finish(mdr); | |
5577 | } | |
5578 | } | |
5579 | ||
5580 | ||
5581 | struct C_MDS_CommittedSlave : public ServerLogContext { | |
5582 | C_MDS_CommittedSlave(Server *s, MDRequestRef& m) : ServerLogContext(s, m) {} | |
5583 | void finish(int r) override { | |
5584 | server->_committed_slave(mdr); | |
5585 | } | |
5586 | }; | |
5587 | ||
5588 | void Server::_commit_slave_link(MDRequestRef& mdr, int r, CInode *targeti) | |
5589 | { | |
5590 | dout(10) << "_commit_slave_link " << *mdr | |
5591 | << " r=" << r | |
5592 | << " " << *targeti << dendl; | |
5593 | ||
5594 | assert(g_conf->mds_kill_link_at != 7); | |
5595 | ||
5596 | if (r == 0) { | |
5597 | // drop our pins, etc. | |
5598 | mdr->cleanup(); | |
5599 | ||
5600 | // write a commit to the journal | |
5601 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_commit", mdr->reqid, mdr->slave_to_mds, | |
5602 | ESlaveUpdate::OP_COMMIT, ESlaveUpdate::LINK); | |
5603 | mdlog->start_entry(le); | |
5604 | submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__); | |
5605 | mdlog->flush(); | |
5606 | } else { | |
5607 | do_link_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr); | |
5608 | } | |
5609 | } | |
5610 | ||
5611 | void Server::_committed_slave(MDRequestRef& mdr) | |
5612 | { | |
5613 | dout(10) << "_committed_slave " << *mdr << dendl; | |
5614 | ||
5615 | assert(g_conf->mds_kill_link_at != 8); | |
5616 | ||
5617 | MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
5618 | MMDSSlaveRequest::OP_COMMITTED); | |
5619 | mds->send_message_mds(req, mdr->slave_to_mds); | |
5620 | mdcache->request_finish(mdr); | |
5621 | } | |
5622 | ||
5623 | struct C_MDS_LoggedLinkRollback : public ServerLogContext { | |
5624 | MutationRef mut; | |
5625 | C_MDS_LoggedLinkRollback(Server *s, MutationRef& m, MDRequestRef& r) : ServerLogContext(s, r), mut(m) {} | |
5626 | void finish(int r) override { | |
5627 | server->_link_rollback_finish(mut, mdr); | |
5628 | } | |
5629 | }; | |
5630 | ||
5631 | void Server::do_link_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr) | |
5632 | { | |
5633 | link_rollback rollback; | |
5634 | bufferlist::iterator p = rbl.begin(); | |
5635 | ::decode(rollback, p); | |
5636 | ||
5637 | dout(10) << "do_link_rollback on " << rollback.reqid | |
5638 | << (rollback.was_inc ? " inc":" dec") | |
5639 | << " ino " << rollback.ino | |
5640 | << dendl; | |
5641 | ||
5642 | assert(g_conf->mds_kill_link_at != 9); | |
5643 | ||
5644 | mdcache->add_rollback(rollback.reqid, master); // need to finish this update before resolve finishes | |
5645 | assert(mdr || mds->is_resolve()); | |
5646 | ||
5647 | MutationRef mut(new MutationImpl(nullptr, utime_t(), rollback.reqid)); | |
5648 | mut->ls = mds->mdlog->get_current_segment(); | |
5649 | ||
5650 | CInode *in = mdcache->get_inode(rollback.ino); | |
5651 | assert(in); | |
5652 | dout(10) << " target is " << *in << dendl; | |
5653 | assert(!in->is_projected()); // live slave request hold versionlock xlock. | |
5654 | ||
5655 | inode_t *pi = in->project_inode(); | |
5656 | pi->version = in->pre_dirty(); | |
5657 | mut->add_projected_inode(in); | |
5658 | ||
5659 | // parent dir rctime | |
5660 | CDir *parent = in->get_projected_parent_dn()->get_dir(); | |
5661 | fnode_t *pf = parent->project_fnode(); | |
5662 | mut->add_projected_fnode(parent); | |
5663 | pf->version = parent->pre_dirty(); | |
5664 | if (pf->fragstat.mtime == pi->ctime) { | |
5665 | pf->fragstat.mtime = rollback.old_dir_mtime; | |
5666 | if (pf->rstat.rctime == pi->ctime) | |
5667 | pf->rstat.rctime = rollback.old_dir_rctime; | |
5668 | mut->add_updated_lock(&parent->get_inode()->filelock); | |
5669 | mut->add_updated_lock(&parent->get_inode()->nestlock); | |
5670 | } | |
5671 | ||
5672 | // inode | |
5673 | pi->ctime = rollback.old_ctime; | |
5674 | if (rollback.was_inc) | |
5675 | pi->nlink--; | |
5676 | else | |
5677 | pi->nlink++; | |
5678 | ||
5679 | // journal it | |
5680 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_link_rollback", rollback.reqid, master, | |
5681 | ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::LINK); | |
5682 | mdlog->start_entry(le); | |
5683 | le->commit.add_dir_context(parent); | |
5684 | le->commit.add_dir(parent, true); | |
5685 | le->commit.add_primary_dentry(in->get_projected_parent_dn(), 0, true); | |
5686 | ||
5687 | submit_mdlog_entry(le, new C_MDS_LoggedLinkRollback(this, mut, mdr), | |
5688 | mdr, __func__); | |
5689 | mdlog->flush(); | |
5690 | } | |
5691 | ||
5692 | void Server::_link_rollback_finish(MutationRef& mut, MDRequestRef& mdr) | |
5693 | { | |
5694 | dout(10) << "_link_rollback_finish" << dendl; | |
5695 | ||
5696 | assert(g_conf->mds_kill_link_at != 10); | |
5697 | ||
5698 | mut->apply(); | |
5699 | if (mdr) | |
5700 | mdcache->request_finish(mdr); | |
5701 | ||
5702 | mdcache->finish_rollback(mut->reqid); | |
5703 | ||
5704 | mut->cleanup(); | |
5705 | } | |
5706 | ||
5707 | ||
5708 | /* This function DOES NOT put the passed message before returning*/ | |
5709 | void Server::handle_slave_link_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *m) | |
5710 | { | |
5711 | dout(10) << "handle_slave_link_prep_ack " << *mdr | |
5712 | << " " << *m << dendl; | |
5713 | mds_rank_t from = mds_rank_t(m->get_source().num()); | |
5714 | ||
5715 | assert(g_conf->mds_kill_link_at != 11); | |
5716 | ||
5717 | // note slave | |
5718 | mdr->more()->slaves.insert(from); | |
5719 | ||
5720 | // witnessed! | |
5721 | assert(mdr->more()->witnessed.count(from) == 0); | |
5722 | mdr->more()->witnessed.insert(from); | |
5723 | assert(!m->is_not_journaled()); | |
5724 | mdr->more()->has_journaled_slaves = true; | |
5725 | ||
5726 | // remove from waiting list | |
5727 | assert(mdr->more()->waiting_on_slave.count(from)); | |
5728 | mdr->more()->waiting_on_slave.erase(from); | |
5729 | ||
5730 | assert(mdr->more()->waiting_on_slave.empty()); | |
5731 | ||
5732 | dispatch_client_request(mdr); // go again! | |
5733 | } | |
5734 | ||
5735 | ||
5736 | ||
5737 | ||
5738 | ||
5739 | // UNLINK | |
5740 | ||
5741 | void Server::handle_client_unlink(MDRequestRef& mdr) | |
5742 | { | |
5743 | MClientRequest *req = mdr->client_request; | |
5744 | client_t client = mdr->get_client(); | |
5745 | ||
5746 | // rmdir or unlink? | |
5747 | bool rmdir = false; | |
5748 | if (req->get_op() == CEPH_MDS_OP_RMDIR) rmdir = true; | |
5749 | ||
5750 | if (req->get_filepath().depth() == 0) { | |
5751 | respond_to_request(mdr, -EINVAL); | |
5752 | return; | |
5753 | } | |
5754 | ||
5755 | // traverse to path | |
5756 | vector<CDentry*> trace; | |
5757 | CInode *in; | |
5758 | int r = mdcache->path_traverse(mdr, NULL, NULL, req->get_filepath(), &trace, &in, MDS_TRAVERSE_FORWARD); | |
5759 | if (r > 0) return; | |
5760 | if (r < 0) { | |
5761 | if (r == -ESTALE) { | |
5762 | dout(10) << "FAIL on ESTALE but attempting recovery" << dendl; | |
5763 | mdcache->find_ino_peers(req->get_filepath().get_ino(), new C_MDS_TryFindInode(this, mdr)); | |
5764 | return; | |
5765 | } | |
5766 | respond_to_request(mdr, r); | |
5767 | return; | |
5768 | } | |
5769 | if (mdr->snapid != CEPH_NOSNAP) { | |
5770 | respond_to_request(mdr, -EROFS); | |
5771 | return; | |
5772 | } | |
5773 | ||
5774 | CDentry *dn = trace[trace.size()-1]; | |
5775 | assert(dn); | |
5776 | if (!dn->is_auth()) { | |
5777 | mdcache->request_forward(mdr, dn->authority().first); | |
5778 | return; | |
5779 | } | |
5780 | ||
5781 | CInode *diri = dn->get_dir()->get_inode(); | |
5782 | ||
5783 | CDentry::linkage_t *dnl = dn->get_linkage(client, mdr); | |
5784 | assert(!dnl->is_null()); | |
5785 | ||
5786 | if (rmdir) { | |
5787 | dout(7) << "handle_client_rmdir on " << *dn << dendl; | |
5788 | } else { | |
5789 | dout(7) << "handle_client_unlink on " << *dn << dendl; | |
5790 | } | |
5791 | dout(7) << "dn links to " << *in << dendl; | |
5792 | ||
5793 | // rmdir vs is_dir | |
5794 | if (in->is_dir()) { | |
5795 | if (rmdir) { | |
5796 | // do empty directory checks | |
5797 | if (_dir_is_nonempty_unlocked(mdr, in)) { | |
5798 | respond_to_request(mdr, -ENOTEMPTY); | |
5799 | return; | |
5800 | } | |
5801 | } else { | |
5802 | dout(7) << "handle_client_unlink on dir " << *in << ", returning error" << dendl; | |
5803 | respond_to_request(mdr, -EISDIR); | |
5804 | return; | |
5805 | } | |
5806 | } else { | |
5807 | if (rmdir) { | |
5808 | // unlink | |
5809 | dout(7) << "handle_client_rmdir on non-dir " << *in << ", returning error" << dendl; | |
5810 | respond_to_request(mdr, -ENOTDIR); | |
5811 | return; | |
5812 | } | |
5813 | } | |
5814 | ||
5815 | // -- create stray dentry? -- | |
5816 | CDentry *straydn = NULL; | |
5817 | if (dnl->is_primary()) { | |
5818 | straydn = prepare_stray_dentry(mdr, dnl->get_inode()); | |
5819 | if (!straydn) | |
5820 | return; | |
5821 | dout(10) << " straydn is " << *straydn << dendl; | |
5822 | } else if (mdr->straydn) { | |
5823 | mdr->unpin(mdr->straydn); | |
5824 | mdr->straydn = NULL; | |
5825 | } | |
5826 | ||
5827 | // lock | |
5828 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
5829 | ||
5830 | for (int i=0; i<(int)trace.size()-1; i++) | |
5831 | rdlocks.insert(&trace[i]->lock); | |
5832 | xlocks.insert(&dn->lock); | |
5833 | wrlocks.insert(&diri->filelock); | |
5834 | wrlocks.insert(&diri->nestlock); | |
5835 | xlocks.insert(&in->linklock); | |
5836 | if (straydn) { | |
5837 | wrlocks.insert(&straydn->get_dir()->inode->filelock); | |
5838 | wrlocks.insert(&straydn->get_dir()->inode->nestlock); | |
5839 | xlocks.insert(&straydn->lock); | |
5840 | } | |
5841 | if (in->is_dir()) | |
5842 | rdlocks.insert(&in->filelock); // to verify it's empty | |
5843 | mds->locker->include_snap_rdlocks(rdlocks, dnl->get_inode()); | |
5844 | ||
5845 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
5846 | return; | |
5847 | ||
5848 | if (in->is_dir() && | |
5849 | _dir_is_nonempty(mdr, in)) { | |
5850 | respond_to_request(mdr, -ENOTEMPTY); | |
5851 | return; | |
5852 | } | |
5853 | ||
5854 | if ((!mdr->has_more() || mdr->more()->witnessed.empty())) { | |
5855 | if (!check_access(mdr, diri, MAY_WRITE)) | |
5856 | return; | |
5857 | } | |
5858 | ||
5859 | // yay! | |
5860 | if (in->is_dir() && in->has_subtree_root_dirfrag()) { | |
5861 | // subtree root auths need to be witnesses | |
5862 | set<mds_rank_t> witnesses; | |
5863 | in->list_replicas(witnesses); | |
5864 | dout(10) << " witnesses " << witnesses << ", have " << mdr->more()->witnessed << dendl; | |
5865 | ||
5866 | for (set<mds_rank_t>::iterator p = witnesses.begin(); | |
5867 | p != witnesses.end(); | |
5868 | ++p) { | |
5869 | if (mdr->more()->witnessed.count(*p)) { | |
5870 | dout(10) << " already witnessed by mds." << *p << dendl; | |
5871 | } else if (mdr->more()->waiting_on_slave.count(*p)) { | |
5872 | dout(10) << " already waiting on witness mds." << *p << dendl; | |
5873 | } else { | |
5874 | if (!_rmdir_prepare_witness(mdr, *p, trace, straydn)) | |
5875 | return; | |
5876 | } | |
5877 | } | |
5878 | if (!mdr->more()->waiting_on_slave.empty()) | |
5879 | return; // we're waiting for a witness. | |
5880 | } | |
5881 | ||
5882 | // ok! | |
5883 | if (dnl->is_remote() && !dnl->get_inode()->is_auth()) | |
5884 | _link_remote(mdr, false, dn, dnl->get_inode()); | |
5885 | else | |
5886 | _unlink_local(mdr, dn, straydn); | |
5887 | } | |
5888 | ||
5889 | class C_MDS_unlink_local_finish : public ServerLogContext { | |
5890 | CDentry *dn; | |
5891 | CDentry *straydn; | |
5892 | version_t dnpv; // deleted dentry | |
5893 | public: | |
5894 | C_MDS_unlink_local_finish(Server *s, MDRequestRef& r, CDentry *d, CDentry *sd) : | |
5895 | ServerLogContext(s, r), dn(d), straydn(sd), | |
5896 | dnpv(d->get_projected_version()) {} | |
5897 | void finish(int r) override { | |
5898 | assert(r == 0); | |
5899 | server->_unlink_local_finish(mdr, dn, straydn, dnpv); | |
5900 | } | |
5901 | }; | |
5902 | ||
5903 | void Server::_unlink_local(MDRequestRef& mdr, CDentry *dn, CDentry *straydn) | |
5904 | { | |
5905 | dout(10) << "_unlink_local " << *dn << dendl; | |
5906 | ||
5907 | CDentry::linkage_t *dnl = dn->get_projected_linkage(); | |
5908 | CInode *in = dnl->get_inode(); | |
5909 | ||
5910 | SnapRealm *realm = in->find_snaprealm(); | |
5911 | snapid_t follows = realm->get_newest_seq(); | |
5912 | ||
5913 | // ok, let's do it. | |
5914 | mdr->ls = mdlog->get_current_segment(); | |
5915 | ||
5916 | // prepare log entry | |
5917 | EUpdate *le = new EUpdate(mdlog, "unlink_local"); | |
5918 | mdlog->start_entry(le); | |
5919 | le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid()); | |
5920 | if (!mdr->more()->witnessed.empty()) { | |
5921 | dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl; | |
5922 | le->reqid = mdr->reqid; | |
5923 | le->had_slaves = true; | |
5924 | mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed); | |
5925 | } | |
5926 | ||
5927 | if (straydn) { | |
5928 | assert(dnl->is_primary()); | |
5929 | straydn->push_projected_linkage(in); | |
5930 | straydn->first = follows + 1; | |
5931 | } | |
5932 | ||
5933 | // the unlinked dentry | |
5934 | dn->pre_dirty(); | |
5935 | ||
5936 | inode_t *pi = in->project_inode(); | |
31f18b77 | 5937 | dn->make_path_string(pi->stray_prior_path, true); |
7c673cae FG |
5938 | mdr->add_projected_inode(in); // do this _after_ my dn->pre_dirty().. we apply that one manually. |
5939 | pi->version = in->pre_dirty(); | |
5940 | pi->ctime = mdr->get_op_stamp(); | |
5941 | pi->change_attr++; | |
5942 | pi->nlink--; | |
5943 | if (pi->nlink == 0) | |
5944 | in->state_set(CInode::STATE_ORPHAN); | |
5945 | ||
5946 | if (dnl->is_primary()) { | |
5947 | // primary link. add stray dentry. | |
5948 | assert(straydn); | |
5949 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, -1); | |
5950 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, straydn->get_dir(), PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
5951 | ||
5952 | // project snaprealm, too | |
5953 | if (in->snaprealm || follows + 1 > in->get_oldest_snap()) | |
5954 | in->project_past_snaprealm_parent(straydn->get_dir()->inode->find_snaprealm()); | |
5955 | ||
5956 | pi->update_backtrace(); | |
5957 | le->metablob.add_primary_dentry(straydn, in, true, true); | |
5958 | } else { | |
5959 | // remote link. update remote inode. | |
5960 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, dn->get_dir(), PREDIRTY_DIR, -1); | |
5961 | mdcache->predirty_journal_parents(mdr, &le->metablob, in, 0, PREDIRTY_PRIMARY); | |
5962 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, in); | |
5963 | } | |
5964 | ||
5965 | mdcache->journal_cow_dentry(mdr.get(), &le->metablob, dn); | |
5966 | le->metablob.add_null_dentry(dn, true); | |
5967 | ||
5968 | if (in->is_dir()) { | |
5969 | dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl; | |
5970 | le->metablob.renamed_dirino = in->ino(); | |
5971 | } | |
5972 | ||
5973 | dn->push_projected_linkage(); | |
5974 | ||
5975 | if (in->is_dir()) { | |
5976 | assert(straydn); | |
5977 | mdcache->project_subtree_rename(in, dn->get_dir(), straydn->get_dir()); | |
5978 | } | |
5979 | ||
5980 | journal_and_reply(mdr, 0, dn, le, new C_MDS_unlink_local_finish(this, mdr, dn, straydn)); | |
5981 | } | |
5982 | ||
5983 | void Server::_unlink_local_finish(MDRequestRef& mdr, | |
5984 | CDentry *dn, CDentry *straydn, | |
5985 | version_t dnpv) | |
5986 | { | |
5987 | dout(10) << "_unlink_local_finish " << *dn << dendl; | |
5988 | ||
5989 | if (!mdr->more()->witnessed.empty()) | |
5990 | mdcache->logged_master_update(mdr->reqid); | |
5991 | ||
5992 | // unlink main dentry | |
5993 | dn->get_dir()->unlink_inode(dn); | |
5994 | dn->pop_projected_linkage(); | |
5995 | ||
5996 | // relink as stray? (i.e. was primary link?) | |
5997 | CInode *strayin = NULL; | |
5998 | bool snap_is_new = false; | |
5999 | if (straydn) { | |
6000 | dout(20) << " straydn is " << *straydn << dendl; | |
6001 | CDentry::linkage_t *straydnl = straydn->pop_projected_linkage(); | |
6002 | strayin = straydnl->get_inode(); | |
6003 | ||
6004 | snap_is_new = strayin->snaprealm ? true : false; | |
6005 | mdcache->touch_dentry_bottom(straydn); | |
6006 | } | |
6007 | ||
6008 | dn->mark_dirty(dnpv, mdr->ls); | |
6009 | mdr->apply(); | |
6010 | ||
6011 | if (snap_is_new) //only new if strayin exists | |
6012 | mdcache->do_realm_invalidate_and_update_notify(strayin, CEPH_SNAP_OP_SPLIT, true); | |
6013 | ||
6014 | mdcache->send_dentry_unlink(dn, straydn, mdr); | |
6015 | ||
6016 | // update subtree map? | |
6017 | if (straydn && strayin->is_dir()) | |
6018 | mdcache->adjust_subtree_after_rename(strayin, dn->get_dir(), true); | |
6019 | ||
6020 | // bump pop | |
6021 | mds->balancer->hit_dir(mdr->get_mds_stamp(), dn->get_dir(), META_POP_IWR); | |
6022 | ||
6023 | // reply | |
6024 | respond_to_request(mdr, 0); | |
6025 | ||
6026 | // removing a new dn? | |
6027 | dn->get_dir()->try_remove_unlinked_dn(dn); | |
6028 | ||
6029 | // clean up ? | |
6030 | // respond_to_request() drops locks. So stray reintegration can race with us. | |
6031 | if (straydn && !straydn->get_projected_linkage()->is_null()) { | |
6032 | // Tip off the MDCache that this dentry is a stray that | |
6033 | // might be elegible for purge. | |
6034 | mdcache->notify_stray(straydn); | |
6035 | } | |
6036 | } | |
6037 | ||
6038 | bool Server::_rmdir_prepare_witness(MDRequestRef& mdr, mds_rank_t who, vector<CDentry*>& trace, CDentry *straydn) | |
6039 | { | |
6040 | if (mds->is_cluster_degraded() && | |
6041 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(who)) { | |
6042 | dout(10) << "_rmdir_prepare_witness mds." << who << " is not active" << dendl; | |
6043 | if (mdr->more()->waiting_on_slave.empty()) | |
6044 | mds->wait_for_active_peer(who, new C_MDS_RetryRequest(mdcache, mdr)); | |
6045 | return false; | |
6046 | } | |
6047 | ||
6048 | dout(10) << "_rmdir_prepare_witness mds." << who << dendl; | |
6049 | MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
6050 | MMDSSlaveRequest::OP_RMDIRPREP); | |
6051 | req->srcdnpath = filepath(trace.front()->get_dir()->ino()); | |
6052 | for (auto dn : trace) | |
6053 | req->srcdnpath.push_dentry(dn->name); | |
6054 | mdcache->replicate_stray(straydn, who, req->stray); | |
6055 | ||
6056 | req->op_stamp = mdr->get_op_stamp(); | |
6057 | mds->send_message_mds(req, who); | |
6058 | ||
6059 | assert(mdr->more()->waiting_on_slave.count(who) == 0); | |
6060 | mdr->more()->waiting_on_slave.insert(who); | |
6061 | return true; | |
6062 | } | |
6063 | ||
6064 | struct C_MDS_SlaveRmdirPrep : public ServerLogContext { | |
6065 | CDentry *dn, *straydn; | |
6066 | C_MDS_SlaveRmdirPrep(Server *s, MDRequestRef& r, CDentry *d, CDentry *st) | |
6067 | : ServerLogContext(s, r), dn(d), straydn(st) {} | |
6068 | void finish(int r) override { | |
6069 | server->_logged_slave_rmdir(mdr, dn, straydn); | |
6070 | } | |
6071 | }; | |
6072 | ||
6073 | struct C_MDS_SlaveRmdirCommit : public ServerContext { | |
6074 | MDRequestRef mdr; | |
31f18b77 FG |
6075 | CDentry *straydn; |
6076 | C_MDS_SlaveRmdirCommit(Server *s, MDRequestRef& r, CDentry *sd) | |
6077 | : ServerContext(s), mdr(r), straydn(sd) { } | |
7c673cae | 6078 | void finish(int r) override { |
31f18b77 | 6079 | server->_commit_slave_rmdir(mdr, r, straydn); |
7c673cae FG |
6080 | } |
6081 | }; | |
6082 | ||
6083 | void Server::handle_slave_rmdir_prep(MDRequestRef& mdr) | |
6084 | { | |
6085 | dout(10) << "handle_slave_rmdir_prep " << *mdr | |
6086 | << " " << mdr->slave_request->srcdnpath | |
6087 | << " to " << mdr->slave_request->destdnpath | |
6088 | << dendl; | |
6089 | ||
6090 | vector<CDentry*> trace; | |
6091 | filepath srcpath(mdr->slave_request->srcdnpath); | |
6092 | dout(10) << " src " << srcpath << dendl; | |
6093 | CInode *in; | |
6094 | int r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &trace, &in, MDS_TRAVERSE_DISCOVERXLOCK); | |
6095 | if (r > 0) return; | |
6096 | if (r == -ESTALE) { | |
6097 | mdcache->find_ino_peers(srcpath.get_ino(), new C_MDS_RetryRequest(mdcache, mdr), | |
6098 | mdr->slave_to_mds); | |
6099 | return; | |
6100 | } | |
6101 | assert(r == 0); | |
6102 | CDentry *dn = trace[trace.size()-1]; | |
6103 | dout(10) << " dn " << *dn << dendl; | |
6104 | mdr->pin(dn); | |
6105 | ||
6106 | assert(mdr->straydn); | |
6107 | CDentry *straydn = mdr->straydn; | |
6108 | dout(10) << " straydn " << *straydn << dendl; | |
6109 | ||
6110 | mdr->set_op_stamp(mdr->slave_request->op_stamp); | |
6111 | ||
6112 | rmdir_rollback rollback; | |
6113 | rollback.reqid = mdr->reqid; | |
6114 | rollback.src_dir = dn->get_dir()->dirfrag(); | |
6115 | rollback.src_dname = dn->name; | |
6116 | rollback.dest_dir = straydn->get_dir()->dirfrag(); | |
6117 | rollback.dest_dname = straydn->name; | |
6118 | ::encode(rollback, mdr->more()->rollback_bl); | |
6119 | dout(20) << " rollback is " << mdr->more()->rollback_bl.length() << " bytes" << dendl; | |
6120 | ||
6121 | // set up commit waiter | |
31f18b77 | 6122 | mdr->more()->slave_commit = new C_MDS_SlaveRmdirCommit(this, mdr, straydn); |
7c673cae FG |
6123 | |
6124 | if (!in->has_subtree_root_dirfrag(mds->get_nodeid())) { | |
6125 | dout(10) << " no auth subtree in " << *in << ", skipping journal" << dendl; | |
6126 | dn->get_dir()->unlink_inode(dn); | |
6127 | straydn->get_dir()->link_primary_inode(straydn, in); | |
6128 | ||
6129 | assert(straydn->first >= in->first); | |
6130 | in->first = straydn->first; | |
6131 | ||
6132 | mdcache->adjust_subtree_after_rename(in, dn->get_dir(), false); | |
6133 | ||
6134 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
6135 | MMDSSlaveRequest::OP_RMDIRPREPACK); | |
6136 | reply->mark_not_journaled(); | |
6137 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
6138 | ||
6139 | // send caps to auth (if we're not already) | |
6140 | if (in->is_any_caps() && !in->state_test(CInode::STATE_EXPORTINGCAPS)) | |
6141 | mdcache->migrator->export_caps(in); | |
6142 | ||
6143 | mdcache->touch_dentry_bottom(straydn); // move stray to end of lru | |
6144 | ||
6145 | mdr->slave_request->put(); | |
6146 | mdr->slave_request = 0; | |
6147 | mdr->straydn = 0; | |
6148 | return; | |
6149 | } | |
6150 | ||
6151 | straydn->push_projected_linkage(in); | |
6152 | dn->push_projected_linkage(); | |
6153 | ||
6154 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir", mdr->reqid, mdr->slave_to_mds, | |
6155 | ESlaveUpdate::OP_PREPARE, ESlaveUpdate::RMDIR); | |
6156 | mdlog->start_entry(le); | |
6157 | le->rollback = mdr->more()->rollback_bl; | |
6158 | ||
6159 | le->commit.add_dir_context(straydn->get_dir()); | |
6160 | le->commit.add_primary_dentry(straydn, in, true); | |
6161 | // slave: no need to journal original dentry | |
6162 | ||
6163 | dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl; | |
6164 | le->commit.renamed_dirino = in->ino(); | |
6165 | ||
6166 | mdcache->project_subtree_rename(in, dn->get_dir(), straydn->get_dir()); | |
6167 | ||
6168 | mdr->more()->slave_update_journaled = true; | |
6169 | submit_mdlog_entry(le, new C_MDS_SlaveRmdirPrep(this, mdr, dn, straydn), | |
6170 | mdr, __func__); | |
6171 | mdlog->flush(); | |
6172 | } | |
6173 | ||
6174 | void Server::_logged_slave_rmdir(MDRequestRef& mdr, CDentry *dn, CDentry *straydn) | |
6175 | { | |
6176 | dout(10) << "_logged_slave_rmdir " << *mdr << " on " << *dn << dendl; | |
6177 | ||
6178 | // update our cache now, so we are consistent with what is in the journal | |
6179 | // when we journal a subtree map | |
6180 | CInode *in = dn->get_linkage()->get_inode(); | |
6181 | dn->get_dir()->unlink_inode(dn); | |
6182 | straydn->pop_projected_linkage(); | |
6183 | dn->pop_projected_linkage(); | |
6184 | mdcache->adjust_subtree_after_rename(in, dn->get_dir(), true); | |
6185 | ||
6186 | // done. | |
6187 | mdr->slave_request->put(); | |
6188 | mdr->slave_request = 0; | |
6189 | mdr->straydn = 0; | |
6190 | ||
6191 | if (!mdr->aborted) { | |
6192 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
6193 | MMDSSlaveRequest::OP_RMDIRPREPACK); | |
6194 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
6195 | } else { | |
6196 | dout(10) << " abort flag set, finishing" << dendl; | |
6197 | mdcache->request_finish(mdr); | |
6198 | } | |
6199 | } | |
6200 | ||
6201 | void Server::handle_slave_rmdir_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack) | |
6202 | { | |
6203 | dout(10) << "handle_slave_rmdir_prep_ack " << *mdr | |
6204 | << " " << *ack << dendl; | |
6205 | ||
6206 | mds_rank_t from = mds_rank_t(ack->get_source().num()); | |
6207 | ||
6208 | mdr->more()->slaves.insert(from); | |
6209 | mdr->more()->witnessed.insert(from); | |
6210 | if (!ack->is_not_journaled()) | |
6211 | mdr->more()->has_journaled_slaves = true; | |
6212 | ||
6213 | // remove from waiting list | |
6214 | assert(mdr->more()->waiting_on_slave.count(from)); | |
6215 | mdr->more()->waiting_on_slave.erase(from); | |
6216 | ||
6217 | if (mdr->more()->waiting_on_slave.empty()) | |
6218 | dispatch_client_request(mdr); // go again! | |
6219 | else | |
6220 | dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl; | |
6221 | } | |
6222 | ||
31f18b77 | 6223 | void Server::_commit_slave_rmdir(MDRequestRef& mdr, int r, CDentry *straydn) |
7c673cae FG |
6224 | { |
6225 | dout(10) << "_commit_slave_rmdir " << *mdr << " r=" << r << dendl; | |
6226 | ||
6227 | if (r == 0) { | |
31f18b77 FG |
6228 | if (mdr->more()->slave_update_journaled) { |
6229 | CInode *strayin = straydn->get_projected_linkage()->get_inode(); | |
6230 | if (strayin && !strayin->snaprealm) | |
6231 | mdcache->clear_dirty_bits_for_stray(strayin); | |
6232 | } | |
6233 | ||
7c673cae FG |
6234 | mdr->cleanup(); |
6235 | ||
6236 | if (mdr->more()->slave_update_journaled) { | |
6237 | // write a commit to the journal | |
6238 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir_commit", mdr->reqid, | |
6239 | mdr->slave_to_mds, ESlaveUpdate::OP_COMMIT, | |
6240 | ESlaveUpdate::RMDIR); | |
6241 | mdlog->start_entry(le); | |
6242 | submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__); | |
6243 | mdlog->flush(); | |
6244 | } else { | |
6245 | _committed_slave(mdr); | |
6246 | } | |
6247 | } else { | |
6248 | // abort | |
6249 | do_rmdir_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr); | |
6250 | } | |
6251 | } | |
6252 | ||
6253 | struct C_MDS_LoggedRmdirRollback : public ServerLogContext { | |
6254 | metareqid_t reqid; | |
6255 | CDentry *dn; | |
6256 | CDentry *straydn; | |
6257 | C_MDS_LoggedRmdirRollback(Server *s, MDRequestRef& m, metareqid_t mr, CDentry *d, CDentry *st) | |
6258 | : ServerLogContext(s, m), reqid(mr), dn(d), straydn(st) {} | |
6259 | void finish(int r) override { | |
6260 | server->_rmdir_rollback_finish(mdr, reqid, dn, straydn); | |
6261 | } | |
6262 | }; | |
6263 | ||
6264 | void Server::do_rmdir_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr) | |
6265 | { | |
6266 | // unlink the other rollback methods, the rmdir rollback is only | |
6267 | // needed to record the subtree changes in the journal for inode | |
6268 | // replicas who are auth for empty dirfrags. no actual changes to | |
6269 | // the file system are taking place here, so there is no Mutation. | |
6270 | ||
6271 | rmdir_rollback rollback; | |
6272 | bufferlist::iterator p = rbl.begin(); | |
6273 | ::decode(rollback, p); | |
6274 | ||
6275 | dout(10) << "do_rmdir_rollback on " << rollback.reqid << dendl; | |
6276 | mdcache->add_rollback(rollback.reqid, master); // need to finish this update before resolve finishes | |
6277 | assert(mdr || mds->is_resolve()); | |
6278 | ||
6279 | CDir *dir = mdcache->get_dirfrag(rollback.src_dir); | |
6280 | if (!dir) | |
6281 | dir = mdcache->get_dirfrag(rollback.src_dir.ino, rollback.src_dname); | |
6282 | assert(dir); | |
6283 | CDentry *dn = dir->lookup(rollback.src_dname); | |
6284 | assert(dn); | |
6285 | dout(10) << " dn " << *dn << dendl; | |
6286 | dir = mdcache->get_dirfrag(rollback.dest_dir); | |
6287 | assert(dir); | |
6288 | CDentry *straydn = dir->lookup(rollback.dest_dname); | |
6289 | assert(straydn); | |
6290 | dout(10) << " straydn " << *dn << dendl; | |
6291 | CInode *in = straydn->get_linkage()->get_inode(); | |
6292 | ||
6293 | if (mdr && !mdr->more()->slave_update_journaled) { | |
6294 | assert(!in->has_subtree_root_dirfrag(mds->get_nodeid())); | |
6295 | ||
6296 | straydn->get_dir()->unlink_inode(straydn); | |
6297 | dn->get_dir()->link_primary_inode(dn, in); | |
6298 | ||
6299 | mdcache->adjust_subtree_after_rename(in, straydn->get_dir(), false); | |
6300 | ||
6301 | mdcache->request_finish(mdr); | |
6302 | mdcache->finish_rollback(rollback.reqid); | |
6303 | return; | |
6304 | } | |
6305 | ||
6306 | dn->push_projected_linkage(in); | |
6307 | straydn->push_projected_linkage(); | |
6308 | ||
6309 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rmdir_rollback", rollback.reqid, master, | |
6310 | ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::RMDIR); | |
6311 | mdlog->start_entry(le); | |
6312 | ||
6313 | le->commit.add_dir_context(dn->get_dir()); | |
6314 | le->commit.add_primary_dentry(dn, in, true); | |
6315 | // slave: no need to journal straydn | |
6316 | ||
6317 | dout(10) << " noting renamed (unlinked) dir ino " << in->ino() << " in metablob" << dendl; | |
6318 | le->commit.renamed_dirino = in->ino(); | |
6319 | ||
6320 | mdcache->project_subtree_rename(in, straydn->get_dir(), dn->get_dir()); | |
6321 | ||
6322 | submit_mdlog_entry(le, | |
6323 | new C_MDS_LoggedRmdirRollback(this, mdr,rollback.reqid, | |
6324 | dn, straydn), | |
6325 | mdr, __func__); | |
6326 | mdlog->flush(); | |
6327 | } | |
6328 | ||
6329 | void Server::_rmdir_rollback_finish(MDRequestRef& mdr, metareqid_t reqid, CDentry *dn, CDentry *straydn) | |
6330 | { | |
6331 | dout(10) << "_rmdir_rollback_finish " << reqid << dendl; | |
6332 | ||
6333 | straydn->get_dir()->unlink_inode(straydn); | |
6334 | dn->pop_projected_linkage(); | |
6335 | straydn->pop_projected_linkage(); | |
6336 | ||
6337 | CInode *in = dn->get_linkage()->get_inode(); | |
6338 | mdcache->adjust_subtree_after_rename(in, straydn->get_dir(), true); | |
6339 | if (mds->is_resolve()) { | |
6340 | CDir *root = mdcache->get_subtree_root(straydn->get_dir()); | |
6341 | mdcache->try_trim_non_auth_subtree(root); | |
6342 | } | |
6343 | ||
6344 | if (mdr) | |
6345 | mdcache->request_finish(mdr); | |
6346 | ||
6347 | mdcache->finish_rollback(reqid); | |
6348 | } | |
6349 | ||
6350 | ||
6351 | /** _dir_is_nonempty[_unlocked] | |
6352 | * | |
6353 | * check if a directory is non-empty (i.e. we can rmdir it). | |
6354 | * | |
6355 | * the unlocked varient this is a fastpath check. we can't really be | |
6356 | * sure until we rdlock the filelock. | |
6357 | */ | |
6358 | bool Server::_dir_is_nonempty_unlocked(MDRequestRef& mdr, CInode *in) | |
6359 | { | |
6360 | dout(10) << "dir_is_nonempty_unlocked " << *in << dendl; | |
6361 | assert(in->is_auth()); | |
6362 | ||
6363 | if (in->snaprealm && in->snaprealm->srnode.snaps.size()) | |
6364 | return true; // in a snapshot! | |
6365 | ||
6366 | list<CDir*> ls; | |
6367 | in->get_dirfrags(ls); | |
6368 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
6369 | CDir *dir = *p; | |
6370 | // is the frag obviously non-empty? | |
6371 | if (dir->is_auth()) { | |
6372 | if (dir->get_projected_fnode()->fragstat.size()) { | |
6373 | dout(10) << "dir_is_nonempty_unlocked dirstat has " | |
6374 | << dir->get_projected_fnode()->fragstat.size() << " items " << *dir << dendl; | |
6375 | return true; | |
6376 | } | |
6377 | } | |
6378 | } | |
6379 | ||
6380 | return false; | |
6381 | } | |
6382 | ||
6383 | bool Server::_dir_is_nonempty(MDRequestRef& mdr, CInode *in) | |
6384 | { | |
6385 | dout(10) << "dir_is_nonempty " << *in << dendl; | |
6386 | assert(in->is_auth()); | |
6387 | assert(in->filelock.can_read(mdr->get_client())); | |
6388 | ||
6389 | frag_info_t dirstat; | |
6390 | version_t dirstat_version = in->get_projected_inode()->dirstat.version; | |
6391 | ||
6392 | list<CDir*> ls; | |
6393 | in->get_dirfrags(ls); | |
6394 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
6395 | CDir *dir = *p; | |
6396 | const fnode_t *pf = dir->get_projected_fnode(); | |
6397 | if (pf->fragstat.size()) { | |
6398 | dout(10) << "dir_is_nonempty dirstat has " | |
6399 | << pf->fragstat.size() << " items " << *dir << dendl; | |
6400 | return true; | |
6401 | } | |
6402 | ||
6403 | if (pf->accounted_fragstat.version == dirstat_version) | |
6404 | dirstat.add(pf->accounted_fragstat); | |
6405 | else | |
6406 | dirstat.add(pf->fragstat); | |
6407 | } | |
6408 | ||
6409 | return dirstat.size() != in->get_projected_inode()->dirstat.size(); | |
6410 | } | |
6411 | ||
6412 | ||
6413 | // ====================================================== | |
6414 | ||
6415 | ||
6416 | class C_MDS_rename_finish : public ServerLogContext { | |
6417 | CDentry *srcdn; | |
6418 | CDentry *destdn; | |
6419 | CDentry *straydn; | |
6420 | public: | |
6421 | C_MDS_rename_finish(Server *s, MDRequestRef& r, | |
6422 | CDentry *sdn, CDentry *ddn, CDentry *stdn) : | |
6423 | ServerLogContext(s, r), | |
6424 | srcdn(sdn), destdn(ddn), straydn(stdn) { } | |
6425 | void finish(int r) override { | |
6426 | assert(r == 0); | |
6427 | server->_rename_finish(mdr, srcdn, destdn, straydn); | |
6428 | } | |
6429 | }; | |
6430 | ||
6431 | ||
6432 | /** handle_client_rename | |
6433 | * | |
6434 | * rename master is the destdn auth. this is because cached inodes | |
6435 | * must remain connected. thus, any replica of srci, must also | |
6436 | * replicate destdn, and possibly straydn, so that srci (and | |
6437 | * destdn->inode) remain connected during the rename. | |
6438 | * | |
6439 | * to do this, we freeze srci, then master (destdn auth) verifies that | |
6440 | * all other nodes have also replciated destdn and straydn. note that | |
6441 | * destdn replicas need not also replicate srci. this only works when | |
6442 | * destdn is master. | |
6443 | * | |
6444 | * This function takes responsibility for the passed mdr. | |
6445 | */ | |
6446 | void Server::handle_client_rename(MDRequestRef& mdr) | |
6447 | { | |
6448 | MClientRequest *req = mdr->client_request; | |
6449 | dout(7) << "handle_client_rename " << *req << dendl; | |
6450 | ||
6451 | filepath destpath = req->get_filepath(); | |
6452 | filepath srcpath = req->get_filepath2(); | |
6453 | if (destpath.depth() == 0 || srcpath.depth() == 0) { | |
6454 | respond_to_request(mdr, -EINVAL); | |
6455 | return; | |
6456 | } | |
6457 | const string &destname = destpath.last_dentry(); | |
6458 | ||
6459 | vector<CDentry*>& srctrace = mdr->dn[1]; | |
6460 | vector<CDentry*>& desttrace = mdr->dn[0]; | |
6461 | ||
6462 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
6463 | ||
6464 | CDentry *destdn = rdlock_path_xlock_dentry(mdr, 0, rdlocks, wrlocks, xlocks, true, false, true); | |
6465 | if (!destdn) return; | |
6466 | dout(10) << " destdn " << *destdn << dendl; | |
6467 | if (mdr->snapid != CEPH_NOSNAP) { | |
6468 | respond_to_request(mdr, -EROFS); | |
6469 | return; | |
6470 | } | |
6471 | CDentry::linkage_t *destdnl = destdn->get_projected_linkage(); | |
6472 | CDir *destdir = destdn->get_dir(); | |
6473 | assert(destdir->is_auth()); | |
6474 | ||
6475 | int r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &srctrace, NULL, MDS_TRAVERSE_DISCOVER); | |
6476 | if (r > 0) | |
6477 | return; // delayed | |
6478 | if (r < 0) { | |
6479 | if (r == -ESTALE) { | |
6480 | dout(10) << "FAIL on ESTALE but attempting recovery" << dendl; | |
6481 | mdcache->find_ino_peers(srcpath.get_ino(), new C_MDS_TryFindInode(this, mdr)); | |
6482 | } else { | |
6483 | dout(10) << "FAIL on error " << r << dendl; | |
6484 | respond_to_request(mdr, r); | |
6485 | } | |
6486 | return; | |
6487 | ||
6488 | } | |
6489 | assert(!srctrace.empty()); | |
6490 | CDentry *srcdn = srctrace[srctrace.size()-1]; | |
6491 | dout(10) << " srcdn " << *srcdn << dendl; | |
6492 | if (srcdn->last != CEPH_NOSNAP) { | |
6493 | respond_to_request(mdr, -EROFS); | |
6494 | return; | |
6495 | } | |
6496 | CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage(); | |
6497 | CInode *srci = srcdnl->get_inode(); | |
6498 | dout(10) << " srci " << *srci << dendl; | |
6499 | ||
6500 | CInode *oldin = 0; | |
6501 | if (!destdnl->is_null()) { | |
6502 | //dout(10) << "dest dn exists " << *destdn << dendl; | |
6503 | oldin = mdcache->get_dentry_inode(destdn, mdr, true); | |
6504 | if (!oldin) return; | |
6505 | dout(10) << " oldin " << *oldin << dendl; | |
6506 | ||
6507 | // mv /some/thing /to/some/existing_other_thing | |
6508 | if (oldin->is_dir() && !srci->is_dir()) { | |
6509 | respond_to_request(mdr, -EISDIR); | |
6510 | return; | |
6511 | } | |
6512 | if (!oldin->is_dir() && srci->is_dir()) { | |
6513 | respond_to_request(mdr, -ENOTDIR); | |
6514 | return; | |
6515 | } | |
6516 | ||
6517 | // non-empty dir? do trivial fast unlocked check, do another check later with read locks | |
6518 | if (oldin->is_dir() && _dir_is_nonempty_unlocked(mdr, oldin)) { | |
6519 | respond_to_request(mdr, -ENOTEMPTY); | |
6520 | return; | |
6521 | } | |
6522 | if (srci == oldin && !srcdn->get_dir()->inode->is_stray()) { | |
6523 | respond_to_request(mdr, 0); // no-op. POSIX makes no sense. | |
6524 | return; | |
6525 | } | |
6526 | } | |
6527 | ||
6528 | // -- some sanity checks -- | |
6529 | ||
6530 | // src+dest traces _must_ share a common ancestor for locking to prevent orphans | |
6531 | if (destpath.get_ino() != srcpath.get_ino() && | |
6532 | !(req->get_source().is_mds() && | |
6533 | MDS_INO_IS_MDSDIR(srcpath.get_ino()))) { // <-- mds 'rename' out of stray dir is ok! | |
6534 | CInode *srcbase = srctrace[0]->get_dir()->get_inode(); | |
6535 | CInode *destbase = desttrace[0]->get_dir()->get_inode(); | |
6536 | // ok, extend srctrace toward root until it is an ancestor of desttrace. | |
6537 | while (srcbase != destbase && | |
6538 | !srcbase->is_projected_ancestor_of(destbase)) { | |
6539 | CDentry *pdn = srcbase->get_projected_parent_dn(); | |
6540 | srctrace.insert(srctrace.begin(), pdn); | |
6541 | dout(10) << "rename prepending srctrace with " << *pdn << dendl; | |
6542 | srcbase = pdn->get_dir()->get_inode(); | |
6543 | } | |
6544 | ||
6545 | // then, extend destpath until it shares the same parent inode as srcpath. | |
6546 | while (destbase != srcbase) { | |
6547 | CDentry *pdn = destbase->get_projected_parent_dn(); | |
6548 | desttrace.insert(desttrace.begin(), pdn); | |
6549 | rdlocks.insert(&pdn->lock); | |
6550 | dout(10) << "rename prepending desttrace with " << *pdn << dendl; | |
6551 | destbase = pdn->get_dir()->get_inode(); | |
6552 | } | |
6553 | dout(10) << "rename src and dest traces now share common ancestor " << *destbase << dendl; | |
6554 | } | |
6555 | ||
6556 | // src == dest? | |
6557 | if (srcdn->get_dir() == destdir && srcdn->name == destname) { | |
6558 | dout(7) << "rename src=dest, noop" << dendl; | |
6559 | respond_to_request(mdr, 0); | |
6560 | return; | |
6561 | } | |
6562 | ||
6563 | // dest a child of src? | |
6564 | // e.g. mv /usr /usr/foo | |
6565 | CDentry *pdn = destdir->inode->get_projected_parent_dn(); | |
6566 | while (pdn) { | |
6567 | if (pdn == srcdn) { | |
6568 | dout(7) << "cannot rename item to be a child of itself" << dendl; | |
6569 | respond_to_request(mdr, -EINVAL); | |
6570 | return; | |
6571 | } | |
6572 | pdn = pdn->get_dir()->inode->parent; | |
6573 | } | |
6574 | ||
6575 | // is this a stray migration, reintegration or merge? (sanity checks!) | |
6576 | if (mdr->reqid.name.is_mds() && | |
6577 | !(MDS_INO_IS_MDSDIR(srcpath.get_ino()) && | |
6578 | MDS_INO_IS_MDSDIR(destpath.get_ino())) && | |
6579 | !(destdnl->is_remote() && | |
6580 | destdnl->get_remote_ino() == srci->ino())) { | |
6581 | respond_to_request(mdr, -EINVAL); // actually, this won't reply, but whatev. | |
6582 | return; | |
6583 | } | |
6584 | ||
6585 | bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() && | |
6586 | (srcdnl->is_primary() || destdnl->is_primary())); | |
6587 | if (linkmerge) | |
6588 | dout(10) << " this is a link merge" << dendl; | |
6589 | ||
6590 | // -- create stray dentry? -- | |
6591 | CDentry *straydn = NULL; | |
6592 | if (destdnl->is_primary() && !linkmerge) { | |
6593 | straydn = prepare_stray_dentry(mdr, destdnl->get_inode()); | |
6594 | if (!straydn) | |
6595 | return; | |
6596 | dout(10) << " straydn is " << *straydn << dendl; | |
6597 | } else if (mdr->straydn) { | |
6598 | mdr->unpin(mdr->straydn); | |
6599 | mdr->straydn = NULL; | |
6600 | } | |
6601 | ||
6602 | // -- prepare witness list -- | |
6603 | /* | |
6604 | * NOTE: we use _all_ replicas as witnesses. | |
6605 | * this probably isn't totally necessary (esp for file renames), | |
6606 | * but if/when we change that, we have to make sure rejoin is | |
6607 | * sufficiently robust to handle strong rejoins from survivors | |
6608 | * with totally wrong dentry->inode linkage. | |
6609 | * (currently, it can ignore rename effects, because the resolve | |
6610 | * stage will sort them out.) | |
6611 | */ | |
6612 | set<mds_rank_t> witnesses = mdr->more()->extra_witnesses; | |
6613 | if (srcdn->is_auth()) | |
6614 | srcdn->list_replicas(witnesses); | |
6615 | else | |
6616 | witnesses.insert(srcdn->authority().first); | |
6617 | if (srcdnl->is_remote() && !srci->is_auth()) | |
6618 | witnesses.insert(srci->authority().first); | |
6619 | destdn->list_replicas(witnesses); | |
6620 | if (destdnl->is_remote() && !oldin->is_auth()) | |
6621 | witnesses.insert(oldin->authority().first); | |
6622 | dout(10) << " witnesses " << witnesses << ", have " << mdr->more()->witnessed << dendl; | |
6623 | ||
6624 | ||
6625 | // -- locks -- | |
6626 | map<SimpleLock*, mds_rank_t> remote_wrlocks; | |
6627 | ||
6628 | // srctrace items. this mirrors locks taken in rdlock_path_xlock_dentry | |
6629 | for (int i=0; i<(int)srctrace.size(); i++) | |
6630 | rdlocks.insert(&srctrace[i]->lock); | |
6631 | xlocks.insert(&srcdn->lock); | |
6632 | mds_rank_t srcdirauth = srcdn->get_dir()->authority().first; | |
6633 | if (srcdirauth != mds->get_nodeid()) { | |
6634 | dout(10) << " will remote_wrlock srcdir scatterlocks on mds." << srcdirauth << dendl; | |
6635 | remote_wrlocks[&srcdn->get_dir()->inode->filelock] = srcdirauth; | |
6636 | remote_wrlocks[&srcdn->get_dir()->inode->nestlock] = srcdirauth; | |
6637 | if (srci->is_dir()) | |
6638 | rdlocks.insert(&srci->dirfragtreelock); | |
6639 | } else { | |
6640 | wrlocks.insert(&srcdn->get_dir()->inode->filelock); | |
6641 | wrlocks.insert(&srcdn->get_dir()->inode->nestlock); | |
6642 | } | |
6643 | mds->locker->include_snap_rdlocks(rdlocks, srcdn->get_dir()->inode); | |
6644 | ||
6645 | // straydn? | |
6646 | if (straydn) { | |
6647 | wrlocks.insert(&straydn->get_dir()->inode->filelock); | |
6648 | wrlocks.insert(&straydn->get_dir()->inode->nestlock); | |
6649 | xlocks.insert(&straydn->lock); | |
6650 | } | |
6651 | ||
6652 | // xlock versionlock on dentries if there are witnesses. | |
6653 | // replicas can't see projected dentry linkages, and will get | |
6654 | // confused if we try to pipeline things. | |
6655 | if (!witnesses.empty()) { | |
6656 | // take xlock on all projected ancestor dentries for srcdn and destdn. | |
6657 | // this ensures the srcdn and destdn can be traversed to by the witnesses. | |
6658 | for (int i= 0; i<(int)srctrace.size(); i++) { | |
6659 | if (srctrace[i]->is_auth() && srctrace[i]->is_projected()) | |
6660 | xlocks.insert(&srctrace[i]->versionlock); | |
6661 | } | |
6662 | for (int i=0; i<(int)desttrace.size(); i++) { | |
6663 | if (desttrace[i]->is_auth() && desttrace[i]->is_projected()) | |
6664 | xlocks.insert(&desttrace[i]->versionlock); | |
6665 | } | |
6666 | // xlock srci and oldin's primary dentries, so witnesses can call | |
6667 | // open_remote_ino() with 'want_locked=true' when the srcdn or destdn | |
6668 | // is traversed. | |
6669 | if (srcdnl->is_remote()) | |
6670 | xlocks.insert(&srci->get_projected_parent_dn()->lock); | |
6671 | if (destdnl->is_remote()) | |
6672 | xlocks.insert(&oldin->get_projected_parent_dn()->lock); | |
6673 | } | |
6674 | ||
6675 | // we need to update srci's ctime. xlock its least contended lock to do that... | |
6676 | xlocks.insert(&srci->linklock); | |
6677 | ||
6678 | // xlock oldin (for nlink--) | |
6679 | if (oldin) { | |
6680 | xlocks.insert(&oldin->linklock); | |
6681 | if (oldin->is_dir()) | |
6682 | rdlocks.insert(&oldin->filelock); | |
6683 | } | |
6684 | if (srcdnl->is_primary() && srci->is_dir()) | |
6685 | // FIXME: this should happen whenever we are renamning between | |
6686 | // realms, regardless of the file type | |
6687 | // FIXME: If/when this changes, make sure to update the | |
6688 | // "allowance" in handle_slave_rename_prep | |
6689 | xlocks.insert(&srci->snaplock); // FIXME: an auth bcast could be sufficient? | |
6690 | else | |
6691 | rdlocks.insert(&srci->snaplock); | |
6692 | ||
6693 | CInode *auth_pin_freeze = !srcdn->is_auth() && srcdnl->is_primary() ? srci : NULL; | |
6694 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks, | |
6695 | &remote_wrlocks, auth_pin_freeze)) | |
6696 | return; | |
6697 | ||
6698 | if ((!mdr->has_more() || mdr->more()->witnessed.empty())) { | |
6699 | if (!check_access(mdr, srcdn->get_dir()->get_inode(), MAY_WRITE)) | |
6700 | return; | |
6701 | ||
6702 | if (!check_access(mdr, destdn->get_dir()->get_inode(), MAY_WRITE)) | |
6703 | return; | |
6704 | ||
6705 | if (!check_fragment_space(mdr, destdn->get_dir())) | |
6706 | return; | |
6707 | ||
6708 | if (!check_access(mdr, srci, MAY_WRITE)) | |
6709 | return; | |
6710 | } | |
6711 | ||
6712 | // with read lock, really verify oldin is empty | |
6713 | if (oldin && | |
6714 | oldin->is_dir() && | |
6715 | _dir_is_nonempty(mdr, oldin)) { | |
6716 | respond_to_request(mdr, -ENOTEMPTY); | |
6717 | return; | |
6718 | } | |
6719 | ||
6720 | /* project_past_snaprealm_parent() will do this job | |
6721 | * | |
6722 | // moving between snaprealms? | |
6723 | if (srcdnl->is_primary() && srci->is_multiversion() && !srci->snaprealm) { | |
6724 | SnapRealm *srcrealm = srci->find_snaprealm(); | |
6725 | SnapRealm *destrealm = destdn->get_dir()->inode->find_snaprealm(); | |
6726 | if (srcrealm != destrealm && | |
6727 | (srcrealm->get_newest_seq() + 1 > srcdn->first || | |
6728 | destrealm->get_newest_seq() + 1 > srcdn->first)) { | |
6729 | dout(10) << " renaming between snaprealms, creating snaprealm for " << *srci << dendl; | |
6730 | mdcache->snaprealm_create(mdr, srci); | |
6731 | return; | |
6732 | } | |
6733 | } | |
6734 | */ | |
6735 | ||
6736 | assert(g_conf->mds_kill_rename_at != 1); | |
6737 | ||
6738 | // -- open all srcdn inode frags, if any -- | |
6739 | // we need these open so that auth can properly delegate from inode to dirfrags | |
6740 | // after the inode is _ours_. | |
6741 | if (srcdnl->is_primary() && | |
6742 | !srcdn->is_auth() && | |
6743 | srci->is_dir()) { | |
6744 | dout(10) << "srci is remote dir, setting stickydirs and opening all frags" << dendl; | |
6745 | mdr->set_stickydirs(srci); | |
6746 | ||
6747 | list<frag_t> frags; | |
6748 | srci->dirfragtree.get_leaves(frags); | |
6749 | for (list<frag_t>::iterator p = frags.begin(); | |
6750 | p != frags.end(); | |
6751 | ++p) { | |
6752 | CDir *dir = srci->get_dirfrag(*p); | |
6753 | if (!dir) { | |
6754 | dout(10) << " opening " << *p << " under " << *srci << dendl; | |
6755 | mdcache->open_remote_dirfrag(srci, *p, new C_MDS_RetryRequest(mdcache, mdr)); | |
6756 | return; | |
6757 | } | |
6758 | } | |
6759 | } | |
6760 | ||
6761 | // -- prepare witnesses -- | |
6762 | ||
6763 | // do srcdn auth last | |
6764 | mds_rank_t last = MDS_RANK_NONE; | |
6765 | if (!srcdn->is_auth()) { | |
6766 | last = srcdn->authority().first; | |
6767 | mdr->more()->srcdn_auth_mds = last; | |
6768 | // ask auth of srci to mark srci as ambiguous auth if more than two MDS | |
6769 | // are involved in the rename operation. | |
6770 | if (srcdnl->is_primary() && !mdr->more()->is_ambiguous_auth) { | |
6771 | dout(10) << " preparing ambiguous auth for srci" << dendl; | |
6772 | assert(mdr->more()->is_remote_frozen_authpin); | |
6773 | assert(mdr->more()->rename_inode == srci); | |
6774 | _rename_prepare_witness(mdr, last, witnesses, srctrace, desttrace, straydn); | |
6775 | return; | |
6776 | } | |
6777 | } | |
6778 | ||
6779 | for (set<mds_rank_t>::iterator p = witnesses.begin(); | |
6780 | p != witnesses.end(); | |
6781 | ++p) { | |
6782 | if (*p == last) continue; // do it last! | |
6783 | if (mdr->more()->witnessed.count(*p)) { | |
6784 | dout(10) << " already witnessed by mds." << *p << dendl; | |
6785 | } else if (mdr->more()->waiting_on_slave.count(*p)) { | |
6786 | dout(10) << " already waiting on witness mds." << *p << dendl; | |
6787 | } else { | |
6788 | if (!_rename_prepare_witness(mdr, *p, witnesses, srctrace, desttrace, straydn)) | |
6789 | return; | |
6790 | } | |
6791 | } | |
6792 | if (!mdr->more()->waiting_on_slave.empty()) | |
6793 | return; // we're waiting for a witness. | |
6794 | ||
6795 | if (last != MDS_RANK_NONE && mdr->more()->witnessed.count(last) == 0) { | |
6796 | dout(10) << " preparing last witness (srcdn auth)" << dendl; | |
6797 | assert(mdr->more()->waiting_on_slave.count(last) == 0); | |
6798 | _rename_prepare_witness(mdr, last, witnesses, srctrace, desttrace, straydn); | |
6799 | return; | |
6800 | } | |
6801 | ||
6802 | // test hack: bail after slave does prepare, so we can verify it's _live_ rollback. | |
6803 | if (!mdr->more()->slaves.empty() && !srci->is_dir()) | |
6804 | assert(g_conf->mds_kill_rename_at != 3); | |
6805 | if (!mdr->more()->slaves.empty() && srci->is_dir()) | |
6806 | assert(g_conf->mds_kill_rename_at != 4); | |
6807 | ||
6808 | // -- declare now -- | |
6809 | mdr->set_mds_stamp(ceph_clock_now()); | |
6810 | ||
6811 | // -- prepare journal entry -- | |
6812 | mdr->ls = mdlog->get_current_segment(); | |
6813 | EUpdate *le = new EUpdate(mdlog, "rename"); | |
6814 | mdlog->start_entry(le); | |
6815 | le->metablob.add_client_req(mdr->reqid, mdr->client_request->get_oldest_client_tid()); | |
6816 | if (!mdr->more()->witnessed.empty()) { | |
6817 | dout(20) << " noting uncommitted_slaves " << mdr->more()->witnessed << dendl; | |
6818 | ||
6819 | le->reqid = mdr->reqid; | |
6820 | le->had_slaves = true; | |
6821 | ||
6822 | mdcache->add_uncommitted_master(mdr->reqid, mdr->ls, mdr->more()->witnessed); | |
6823 | // no need to send frozen auth pin to recovring auth MDS of srci | |
6824 | mdr->more()->is_remote_frozen_authpin = false; | |
6825 | } | |
6826 | ||
6827 | _rename_prepare(mdr, &le->metablob, &le->client_map, srcdn, destdn, straydn); | |
6828 | if (le->client_map.length()) | |
6829 | le->cmapv = mds->sessionmap.get_projected(); | |
6830 | ||
6831 | // -- commit locally -- | |
6832 | C_MDS_rename_finish *fin = new C_MDS_rename_finish(this, mdr, srcdn, destdn, straydn); | |
6833 | ||
6834 | journal_and_reply(mdr, srci, destdn, le, fin); | |
6835 | } | |
6836 | ||
6837 | ||
6838 | void Server::_rename_finish(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn) | |
6839 | { | |
6840 | dout(10) << "_rename_finish " << *mdr << dendl; | |
6841 | ||
6842 | if (!mdr->more()->witnessed.empty()) | |
6843 | mdcache->logged_master_update(mdr->reqid); | |
6844 | ||
6845 | // apply | |
6846 | _rename_apply(mdr, srcdn, destdn, straydn); | |
6847 | ||
6848 | mdcache->send_dentry_link(destdn, mdr); | |
6849 | ||
6850 | CDentry::linkage_t *destdnl = destdn->get_linkage(); | |
6851 | CInode *in = destdnl->get_inode(); | |
6852 | bool need_eval = mdr->more()->cap_imports.count(in); | |
6853 | ||
6854 | // test hack: test slave commit | |
6855 | if (!mdr->more()->slaves.empty() && !in->is_dir()) | |
6856 | assert(g_conf->mds_kill_rename_at != 5); | |
6857 | if (!mdr->more()->slaves.empty() && in->is_dir()) | |
6858 | assert(g_conf->mds_kill_rename_at != 6); | |
6859 | ||
6860 | // bump popularity | |
6861 | mds->balancer->hit_dir(mdr->get_mds_stamp(), srcdn->get_dir(), META_POP_IWR); | |
6862 | if (destdnl->is_remote() && in->is_auth()) | |
6863 | mds->balancer->hit_inode(mdr->get_mds_stamp(), in, META_POP_IWR); | |
6864 | ||
6865 | // did we import srci? if so, explicitly ack that import that, before we unlock and reply. | |
6866 | ||
6867 | assert(g_conf->mds_kill_rename_at != 7); | |
6868 | ||
6869 | // reply | |
6870 | respond_to_request(mdr, 0); | |
6871 | ||
6872 | if (need_eval) | |
6873 | mds->locker->eval(in, CEPH_CAP_LOCKS, true); | |
6874 | ||
6875 | // clean up? | |
6876 | // respond_to_request() drops locks. So stray reintegration can race with us. | |
6877 | if (straydn && !straydn->get_projected_linkage()->is_null()) { | |
6878 | mdcache->notify_stray(straydn); | |
6879 | } | |
6880 | } | |
6881 | ||
6882 | ||
6883 | ||
6884 | // helpers | |
6885 | ||
6886 | bool Server::_rename_prepare_witness(MDRequestRef& mdr, mds_rank_t who, set<mds_rank_t> &witnesse, | |
6887 | vector<CDentry*>& srctrace, vector<CDentry*>& dsttrace, CDentry *straydn) | |
6888 | { | |
6889 | if (mds->is_cluster_degraded() && | |
6890 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(who)) { | |
6891 | dout(10) << "_rename_prepare_witness mds." << who << " is not active" << dendl; | |
6892 | if (mdr->more()->waiting_on_slave.empty()) | |
6893 | mds->wait_for_active_peer(who, new C_MDS_RetryRequest(mdcache, mdr)); | |
6894 | return false; | |
6895 | } | |
6896 | ||
6897 | dout(10) << "_rename_prepare_witness mds." << who << dendl; | |
6898 | MMDSSlaveRequest *req = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
6899 | MMDSSlaveRequest::OP_RENAMEPREP); | |
6900 | ||
6901 | req->srcdnpath = filepath(srctrace.front()->get_dir()->ino()); | |
6902 | for (auto dn : srctrace) | |
6903 | req->srcdnpath.push_dentry(dn->name); | |
6904 | req->destdnpath = filepath(dsttrace.front()->get_dir()->ino()); | |
6905 | for (auto dn : dsttrace) | |
6906 | req->destdnpath.push_dentry(dn->name); | |
6907 | if (straydn) | |
6908 | mdcache->replicate_stray(straydn, who, req->stray); | |
31f18b77 FG |
6909 | |
6910 | req->srcdn_auth = mdr->more()->srcdn_auth_mds; | |
7c673cae FG |
6911 | |
6912 | // srcdn auth will verify our current witness list is sufficient | |
6913 | req->witnesses = witnesse; | |
6914 | ||
6915 | req->op_stamp = mdr->get_op_stamp(); | |
6916 | mds->send_message_mds(req, who); | |
6917 | ||
6918 | assert(mdr->more()->waiting_on_slave.count(who) == 0); | |
6919 | mdr->more()->waiting_on_slave.insert(who); | |
6920 | return true; | |
6921 | } | |
6922 | ||
6923 | version_t Server::_rename_prepare_import(MDRequestRef& mdr, CDentry *srcdn, bufferlist *client_map_bl) | |
6924 | { | |
6925 | version_t oldpv = mdr->more()->inode_import_v; | |
6926 | ||
6927 | CDentry::linkage_t *srcdnl = srcdn->get_linkage(); | |
6928 | ||
6929 | /* import node */ | |
6930 | bufferlist::iterator blp = mdr->more()->inode_import.begin(); | |
6931 | ||
6932 | // imported caps | |
6933 | ::decode(mdr->more()->imported_client_map, blp); | |
6934 | ::encode(mdr->more()->imported_client_map, *client_map_bl, | |
6935 | mds->mdsmap->get_up_features()); | |
6936 | prepare_force_open_sessions(mdr->more()->imported_client_map, mdr->more()->sseq_map); | |
6937 | ||
6938 | list<ScatterLock*> updated_scatterlocks; | |
6939 | mdcache->migrator->decode_import_inode(srcdn, blp, srcdn->authority().first, mdr->ls, | |
6940 | mdr->more()->cap_imports, updated_scatterlocks); | |
6941 | ||
6942 | // hack: force back to !auth and clean, temporarily | |
6943 | srcdnl->get_inode()->state_clear(CInode::STATE_AUTH); | |
6944 | srcdnl->get_inode()->mark_clean(); | |
6945 | ||
6946 | return oldpv; | |
6947 | } | |
6948 | ||
6949 | bool Server::_need_force_journal(CInode *diri, bool empty) | |
6950 | { | |
6951 | list<CDir*> ls; | |
6952 | diri->get_dirfrags(ls); | |
6953 | ||
6954 | bool force_journal = false; | |
6955 | if (empty) { | |
6956 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
6957 | if ((*p)->is_subtree_root() && (*p)->get_dir_auth().first == mds->get_nodeid()) { | |
6958 | dout(10) << " frag " << (*p)->get_frag() << " is auth subtree dirfrag, will force journal" << dendl; | |
6959 | force_journal = true; | |
6960 | break; | |
6961 | } else | |
6962 | dout(20) << " frag " << (*p)->get_frag() << " is not auth subtree dirfrag" << dendl; | |
6963 | } | |
6964 | } else { | |
6965 | // see if any children of our frags are auth subtrees. | |
6966 | list<CDir*> subtrees; | |
6967 | mdcache->list_subtrees(subtrees); | |
6968 | dout(10) << " subtrees " << subtrees << " frags " << ls << dendl; | |
6969 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
6970 | CDir *dir = *p; | |
6971 | for (list<CDir*>::iterator q = subtrees.begin(); q != subtrees.end(); ++q) { | |
6972 | if (dir->contains(*q)) { | |
6973 | if ((*q)->get_dir_auth().first == mds->get_nodeid()) { | |
6974 | dout(10) << " frag " << (*p)->get_frag() << " contains (maybe) auth subtree, will force journal " | |
6975 | << **q << dendl; | |
6976 | force_journal = true; | |
6977 | break; | |
6978 | } else | |
6979 | dout(20) << " frag " << (*p)->get_frag() << " contains but isn't auth for " << **q << dendl; | |
6980 | } else | |
6981 | dout(20) << " frag " << (*p)->get_frag() << " does not contain " << **q << dendl; | |
6982 | } | |
6983 | if (force_journal) | |
6984 | break; | |
6985 | } | |
6986 | } | |
6987 | return force_journal; | |
6988 | } | |
6989 | ||
6990 | void Server::_rename_prepare(MDRequestRef& mdr, | |
6991 | EMetaBlob *metablob, bufferlist *client_map_bl, | |
6992 | CDentry *srcdn, CDentry *destdn, CDentry *straydn) | |
6993 | { | |
6994 | dout(10) << "_rename_prepare " << *mdr << " " << *srcdn << " " << *destdn << dendl; | |
6995 | if (straydn) | |
6996 | dout(10) << " straydn " << *straydn << dendl; | |
6997 | ||
6998 | CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage(); | |
6999 | CDentry::linkage_t *destdnl = destdn->get_projected_linkage(); | |
7000 | CInode *srci = srcdnl->get_inode(); | |
7001 | CInode *oldin = destdnl->get_inode(); | |
7002 | ||
7003 | // primary+remote link merge? | |
7004 | bool linkmerge = (srci == destdnl->get_inode() && | |
7005 | (srcdnl->is_primary() || destdnl->is_primary())); | |
7006 | bool silent = srcdn->get_dir()->inode->is_stray(); | |
7007 | ||
7008 | bool force_journal_dest = false; | |
7009 | if (srci->is_dir() && !destdn->is_auth()) { | |
7010 | if (srci->is_auth()) { | |
7011 | // if we are auth for srci and exporting it, force journal because journal replay needs | |
7012 | // the source inode to create auth subtrees. | |
7013 | dout(10) << " we are exporting srci, will force journal destdn" << dendl; | |
7014 | force_journal_dest = true; | |
7015 | } else | |
7016 | force_journal_dest = _need_force_journal(srci, false); | |
7017 | } | |
7018 | ||
7019 | bool force_journal_stray = false; | |
7020 | if (oldin && oldin->is_dir() && straydn && !straydn->is_auth()) | |
7021 | force_journal_stray = _need_force_journal(oldin, true); | |
7022 | ||
7023 | if (linkmerge) | |
7024 | dout(10) << " merging remote and primary links to the same inode" << dendl; | |
7025 | if (silent) | |
7026 | dout(10) << " reintegrating stray; will avoid changing nlink or dir mtime" << dendl; | |
7027 | if (force_journal_dest) | |
7028 | dout(10) << " forcing journal destdn because we (will) have auth subtrees nested beneath it" << dendl; | |
7029 | if (force_journal_stray) | |
7030 | dout(10) << " forcing journal straydn because we (will) have auth subtrees nested beneath it" << dendl; | |
7031 | ||
7032 | if (srci->is_dir() && (destdn->is_auth() || force_journal_dest)) { | |
7033 | dout(10) << " noting renamed dir ino " << srci->ino() << " in metablob" << dendl; | |
7034 | metablob->renamed_dirino = srci->ino(); | |
7035 | } else if (oldin && oldin->is_dir() && force_journal_stray) { | |
7036 | dout(10) << " noting rename target dir " << oldin->ino() << " in metablob" << dendl; | |
7037 | metablob->renamed_dirino = oldin->ino(); | |
7038 | } | |
7039 | ||
7040 | // prepare | |
7041 | inode_t *pi = 0; // renamed inode | |
7042 | inode_t *tpi = 0; // target/overwritten inode | |
7043 | ||
7044 | // target inode | |
7045 | if (!linkmerge) { | |
7046 | if (destdnl->is_primary()) { | |
7047 | assert(straydn); // moving to straydn. | |
7048 | // link--, and move. | |
7049 | if (destdn->is_auth()) { | |
7050 | tpi = oldin->project_inode(); //project_snaprealm | |
7051 | tpi->version = straydn->pre_dirty(tpi->version); | |
7052 | tpi->update_backtrace(); | |
7053 | } | |
7054 | straydn->push_projected_linkage(oldin); | |
7055 | } else if (destdnl->is_remote()) { | |
7056 | // nlink-- targeti | |
7057 | if (oldin->is_auth()) { | |
7058 | tpi = oldin->project_inode(); | |
7059 | tpi->version = oldin->pre_dirty(); | |
7060 | } | |
7061 | } | |
7062 | } | |
7063 | ||
7064 | // dest | |
7065 | if (srcdnl->is_remote()) { | |
7066 | if (!linkmerge) { | |
7067 | // destdn | |
7068 | if (destdn->is_auth()) | |
7069 | mdr->more()->pvmap[destdn] = destdn->pre_dirty(); | |
7070 | destdn->push_projected_linkage(srcdnl->get_remote_ino(), srcdnl->get_remote_d_type()); | |
7071 | // srci | |
7072 | if (srci->is_auth()) { | |
7073 | pi = srci->project_inode(); | |
7074 | pi->version = srci->pre_dirty(); | |
7075 | } | |
7076 | } else { | |
7077 | dout(10) << " will merge remote onto primary link" << dendl; | |
7078 | if (destdn->is_auth()) { | |
7079 | pi = oldin->project_inode(); | |
7080 | pi->version = mdr->more()->pvmap[destdn] = destdn->pre_dirty(oldin->inode.version); | |
7081 | } | |
7082 | } | |
7083 | } else { // primary | |
7084 | if (destdn->is_auth()) { | |
7085 | version_t oldpv; | |
7086 | if (srcdn->is_auth()) | |
7087 | oldpv = srci->get_projected_version(); | |
7088 | else { | |
7089 | oldpv = _rename_prepare_import(mdr, srcdn, client_map_bl); | |
7090 | ||
7091 | // note which dirfrags have child subtrees in the journal | |
7092 | // event, so that we can open those (as bounds) during replay. | |
7093 | if (srci->is_dir()) { | |
7094 | list<CDir*> ls; | |
7095 | srci->get_dirfrags(ls); | |
7096 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
7097 | CDir *dir = *p; | |
7098 | if (!dir->is_auth()) | |
7099 | metablob->renamed_dir_frags.push_back(dir->get_frag()); | |
7100 | } | |
7101 | dout(10) << " noting renamed dir open frags " << metablob->renamed_dir_frags << dendl; | |
7102 | } | |
7103 | } | |
7104 | pi = srci->project_inode(); // project snaprealm if srcdnl->is_primary | |
7105 | // & srcdnl->snaprealm | |
7106 | pi->version = mdr->more()->pvmap[destdn] = destdn->pre_dirty(oldpv); | |
7107 | pi->update_backtrace(); | |
7108 | } | |
7109 | destdn->push_projected_linkage(srci); | |
7110 | } | |
7111 | ||
7112 | // src | |
7113 | if (srcdn->is_auth()) | |
7114 | mdr->more()->pvmap[srcdn] = srcdn->pre_dirty(); | |
7115 | srcdn->push_projected_linkage(); // push null linkage | |
7116 | ||
7117 | if (!silent) { | |
7118 | if (pi) { | |
7119 | pi->ctime = mdr->get_op_stamp(); | |
7120 | pi->change_attr++; | |
7121 | if (linkmerge) | |
7122 | pi->nlink--; | |
7123 | } | |
7124 | if (tpi) { | |
7125 | tpi->ctime = mdr->get_op_stamp(); | |
7126 | tpi->change_attr++; | |
31f18b77 | 7127 | destdn->make_path_string(tpi->stray_prior_path, true); |
7c673cae FG |
7128 | tpi->nlink--; |
7129 | if (tpi->nlink == 0) | |
7130 | oldin->state_set(CInode::STATE_ORPHAN); | |
7131 | } | |
7132 | } | |
7133 | ||
7134 | // prepare nesting, mtime updates | |
7135 | int predirty_dir = silent ? 0:PREDIRTY_DIR; | |
7136 | ||
7137 | // guarantee stray dir is processed first during journal replay. unlink the old inode, | |
7138 | // then link the source inode to destdn | |
7139 | if (destdnl->is_primary()) { | |
7140 | assert(straydn); | |
7141 | if (straydn->is_auth()) { | |
7142 | metablob->add_dir_context(straydn->get_dir()); | |
7143 | metablob->add_dir(straydn->get_dir(), true); | |
7144 | } | |
7145 | } | |
7146 | ||
7147 | // sub off target | |
7148 | if (destdn->is_auth() && !destdnl->is_null()) { | |
7149 | mdcache->predirty_journal_parents(mdr, metablob, oldin, destdn->get_dir(), | |
7150 | (destdnl->is_primary() ? PREDIRTY_PRIMARY:0)|predirty_dir, -1); | |
224ce89b WB |
7151 | if (destdnl->is_primary()) { |
7152 | assert(straydn); | |
7c673cae FG |
7153 | mdcache->predirty_journal_parents(mdr, metablob, oldin, straydn->get_dir(), |
7154 | PREDIRTY_PRIMARY|PREDIRTY_DIR, 1); | |
224ce89b | 7155 | } |
7c673cae FG |
7156 | } |
7157 | ||
7158 | // move srcdn | |
7159 | int predirty_primary = (srcdnl->is_primary() && srcdn->get_dir() != destdn->get_dir()) ? PREDIRTY_PRIMARY:0; | |
7160 | int flags = predirty_dir | predirty_primary; | |
7161 | if (srcdn->is_auth()) | |
7162 | mdcache->predirty_journal_parents(mdr, metablob, srci, srcdn->get_dir(), PREDIRTY_SHALLOW|flags, -1); | |
7163 | if (destdn->is_auth()) | |
7164 | mdcache->predirty_journal_parents(mdr, metablob, srci, destdn->get_dir(), flags, 1); | |
7165 | ||
7166 | SnapRealm *src_realm = srci->find_snaprealm(); | |
7167 | SnapRealm *dest_realm = destdn->get_dir()->inode->find_snaprealm(); | |
7168 | snapid_t next_dest_snap = dest_realm->get_newest_seq() + 1; | |
7169 | ||
7170 | // add it all to the metablob | |
7171 | // target inode | |
7172 | if (!linkmerge) { | |
7173 | if (destdnl->is_primary()) { | |
224ce89b | 7174 | assert(straydn); |
7c673cae FG |
7175 | if (destdn->is_auth()) { |
7176 | // project snaprealm, too | |
7177 | if (oldin->snaprealm || dest_realm->get_newest_seq() + 1 > oldin->get_oldest_snap()) | |
7178 | oldin->project_past_snaprealm_parent(straydn->get_dir()->inode->find_snaprealm()); | |
7179 | straydn->first = MAX(oldin->first, next_dest_snap); | |
7180 | metablob->add_primary_dentry(straydn, oldin, true, true); | |
7181 | } else if (force_journal_stray) { | |
7182 | dout(10) << " forced journaling straydn " << *straydn << dendl; | |
7183 | metablob->add_dir_context(straydn->get_dir()); | |
7184 | metablob->add_primary_dentry(straydn, oldin, true); | |
7185 | } | |
7186 | } else if (destdnl->is_remote()) { | |
7187 | if (oldin->is_auth()) { | |
7188 | // auth for targeti | |
7189 | metablob->add_dir_context(oldin->get_projected_parent_dir()); | |
7190 | mdcache->journal_cow_dentry(mdr.get(), metablob, oldin->get_projected_parent_dn(), | |
7191 | CEPH_NOSNAP, 0, destdnl); | |
7192 | metablob->add_primary_dentry(oldin->get_projected_parent_dn(), oldin, true); | |
7193 | } | |
7194 | } | |
7195 | } | |
7196 | ||
7197 | // dest | |
7198 | if (srcdnl->is_remote()) { | |
7199 | if (!linkmerge) { | |
7200 | if (destdn->is_auth() && !destdnl->is_null()) | |
7201 | mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl); | |
7202 | else | |
7203 | destdn->first = MAX(destdn->first, next_dest_snap); | |
7204 | ||
7205 | if (destdn->is_auth()) | |
7206 | metablob->add_remote_dentry(destdn, true, srcdnl->get_remote_ino(), srcdnl->get_remote_d_type()); | |
7207 | if (srci->get_projected_parent_dn()->is_auth()) { // it's remote | |
7208 | metablob->add_dir_context(srci->get_projected_parent_dir()); | |
7209 | mdcache->journal_cow_dentry(mdr.get(), metablob, srci->get_projected_parent_dn(), CEPH_NOSNAP, 0, srcdnl); | |
7210 | metablob->add_primary_dentry(srci->get_projected_parent_dn(), srci, true); | |
7211 | } | |
7212 | } else { | |
7213 | if (destdn->is_auth() && !destdnl->is_null()) | |
7214 | mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl); | |
7215 | else | |
7216 | destdn->first = MAX(destdn->first, next_dest_snap); | |
7217 | ||
7218 | if (destdn->is_auth()) | |
7219 | metablob->add_primary_dentry(destdn, destdnl->get_inode(), true, true); | |
7220 | } | |
7221 | } else if (srcdnl->is_primary()) { | |
7222 | // project snap parent update? | |
7223 | if (destdn->is_auth() && src_realm != dest_realm && | |
7224 | (srci->snaprealm || src_realm->get_newest_seq() + 1 > srci->get_oldest_snap())) | |
7225 | srci->project_past_snaprealm_parent(dest_realm); | |
7226 | ||
7227 | if (destdn->is_auth() && !destdnl->is_null()) | |
7228 | mdcache->journal_cow_dentry(mdr.get(), metablob, destdn, CEPH_NOSNAP, 0, destdnl); | |
7229 | else | |
7230 | destdn->first = MAX(destdn->first, next_dest_snap); | |
7231 | ||
7232 | if (destdn->is_auth()) | |
7233 | metablob->add_primary_dentry(destdn, srci, true, true); | |
7234 | else if (force_journal_dest) { | |
7235 | dout(10) << " forced journaling destdn " << *destdn << dendl; | |
7236 | metablob->add_dir_context(destdn->get_dir()); | |
7237 | metablob->add_primary_dentry(destdn, srci, true); | |
7238 | if (srcdn->is_auth() && srci->is_dir()) { | |
7239 | // journal new subtrees root dirfrags | |
7240 | list<CDir*> ls; | |
7241 | srci->get_dirfrags(ls); | |
7242 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
7243 | CDir *dir = *p; | |
7244 | if (dir->is_auth()) | |
7245 | metablob->add_dir(dir, true); | |
7246 | } | |
7247 | } | |
7248 | } | |
7249 | } | |
7250 | ||
7251 | // src | |
7252 | if (srcdn->is_auth()) { | |
7253 | dout(10) << " journaling srcdn " << *srcdn << dendl; | |
7254 | mdcache->journal_cow_dentry(mdr.get(), metablob, srcdn, CEPH_NOSNAP, 0, srcdnl); | |
7255 | // also journal the inode in case we need do slave rename rollback. It is Ok to add | |
7256 | // both primary and NULL dentries. Because during journal replay, null dentry is | |
7257 | // processed after primary dentry. | |
7258 | if (srcdnl->is_primary() && !srci->is_dir() && !destdn->is_auth()) | |
7259 | metablob->add_primary_dentry(srcdn, srci, true); | |
7260 | metablob->add_null_dentry(srcdn, true); | |
7261 | } else | |
7262 | dout(10) << " NOT journaling srcdn " << *srcdn << dendl; | |
7263 | ||
7264 | // make renamed inode first track the dn | |
7265 | if (srcdnl->is_primary() && destdn->is_auth()) | |
7266 | srci->first = destdn->first; | |
7267 | ||
224ce89b WB |
7268 | if (oldin && oldin->is_dir()) { |
7269 | assert(straydn); | |
7c673cae | 7270 | mdcache->project_subtree_rename(oldin, destdn->get_dir(), straydn->get_dir()); |
224ce89b | 7271 | } |
7c673cae FG |
7272 | if (srci->is_dir()) |
7273 | mdcache->project_subtree_rename(srci, srcdn->get_dir(), destdn->get_dir()); | |
7274 | ||
7275 | } | |
7276 | ||
7277 | ||
7278 | void Server::_rename_apply(MDRequestRef& mdr, CDentry *srcdn, CDentry *destdn, CDentry *straydn) | |
7279 | { | |
7280 | dout(10) << "_rename_apply " << *mdr << " " << *srcdn << " " << *destdn << dendl; | |
7281 | dout(10) << " pvs " << mdr->more()->pvmap << dendl; | |
7282 | ||
7283 | CDentry::linkage_t *srcdnl = srcdn->get_linkage(); | |
7284 | CDentry::linkage_t *destdnl = destdn->get_linkage(); | |
7285 | ||
7286 | CInode *oldin = destdnl->get_inode(); | |
7c673cae FG |
7287 | |
7288 | // primary+remote link merge? | |
7289 | bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() && | |
7290 | (srcdnl->is_primary() || destdnl->is_primary())); | |
7291 | ||
7292 | // target inode | |
7293 | if (!linkmerge) { | |
7294 | if (destdnl->is_primary()) { | |
7295 | assert(straydn); | |
7296 | dout(10) << "straydn is " << *straydn << dendl; | |
31f18b77 | 7297 | destdn->get_dir()->unlink_inode(destdn, false); |
7c673cae FG |
7298 | |
7299 | straydn->pop_projected_linkage(); | |
7300 | if (mdr->is_slave() && !mdr->more()->slave_update_journaled) | |
7301 | assert(!straydn->is_projected()); // no other projected | |
7302 | ||
7303 | mdcache->touch_dentry_bottom(straydn); // drop dn as quickly as possible. | |
7304 | ||
7305 | // nlink-- targeti | |
7306 | if (destdn->is_auth()) { | |
7307 | bool hadrealm = (oldin->snaprealm ? true : false); | |
7308 | oldin->pop_and_dirty_projected_inode(mdr->ls); | |
7309 | if (oldin->snaprealm && !hadrealm) | |
7310 | mdcache->do_realm_invalidate_and_update_notify(oldin, CEPH_SNAP_OP_SPLIT); | |
7311 | } else { | |
7312 | // FIXME this snaprealm is not filled out correctly | |
7313 | //oldin->open_snaprealm(); might be sufficient.. | |
7314 | } | |
7315 | } else if (destdnl->is_remote()) { | |
31f18b77 | 7316 | destdn->get_dir()->unlink_inode(destdn, false); |
7c673cae FG |
7317 | if (oldin->is_auth()) |
7318 | oldin->pop_and_dirty_projected_inode(mdr->ls); | |
7319 | } | |
7320 | } | |
7321 | ||
7322 | // unlink src before we relink it at dest | |
7323 | CInode *in = srcdnl->get_inode(); | |
7324 | assert(in); | |
7325 | ||
7326 | bool srcdn_was_remote = srcdnl->is_remote(); | |
7327 | srcdn->get_dir()->unlink_inode(srcdn); | |
7328 | ||
7329 | // dest | |
7330 | if (srcdn_was_remote) { | |
7331 | if (!linkmerge) { | |
7332 | // destdn | |
7333 | destdnl = destdn->pop_projected_linkage(); | |
7334 | if (mdr->is_slave() && !mdr->more()->slave_update_journaled) | |
7335 | assert(!destdn->is_projected()); // no other projected | |
7336 | ||
7337 | destdn->link_remote(destdnl, in); | |
7338 | if (destdn->is_auth()) | |
7339 | destdn->mark_dirty(mdr->more()->pvmap[destdn], mdr->ls); | |
7340 | // in | |
7341 | if (in->is_auth()) | |
7342 | in->pop_and_dirty_projected_inode(mdr->ls); | |
7343 | } else { | |
7344 | dout(10) << "merging remote onto primary link" << dendl; | |
7345 | oldin->pop_and_dirty_projected_inode(mdr->ls); | |
7346 | } | |
7347 | } else { // primary | |
7348 | if (linkmerge) { | |
7349 | dout(10) << "merging primary onto remote link" << dendl; | |
31f18b77 | 7350 | destdn->get_dir()->unlink_inode(destdn, false); |
7c673cae FG |
7351 | } |
7352 | destdnl = destdn->pop_projected_linkage(); | |
7353 | if (mdr->is_slave() && !mdr->more()->slave_update_journaled) | |
7354 | assert(!destdn->is_projected()); // no other projected | |
7355 | ||
7356 | // srcdn inode import? | |
7357 | if (!srcdn->is_auth() && destdn->is_auth()) { | |
7358 | assert(mdr->more()->inode_import.length() > 0); | |
7359 | ||
7360 | map<client_t,Capability::Import> imported_caps; | |
7361 | ||
7362 | // finish cap imports | |
7363 | finish_force_open_sessions(mdr->more()->imported_client_map, mdr->more()->sseq_map); | |
7364 | if (mdr->more()->cap_imports.count(destdnl->get_inode())) { | |
7365 | mdcache->migrator->finish_import_inode_caps(destdnl->get_inode(), | |
7366 | mdr->more()->srcdn_auth_mds, true, | |
7367 | mdr->more()->cap_imports[destdnl->get_inode()], | |
7368 | imported_caps); | |
7369 | } | |
7370 | ||
7371 | mdr->more()->inode_import.clear(); | |
7372 | ::encode(imported_caps, mdr->more()->inode_import); | |
7373 | ||
7374 | /* hack: add an auth pin for each xlock we hold. These were | |
7375 | * remote xlocks previously but now they're local and | |
7376 | * we're going to try and unpin when we xlock_finish. */ | |
7377 | for (set<SimpleLock *>::iterator i = mdr->xlocks.begin(); | |
7378 | i != mdr->xlocks.end(); | |
7379 | ++i) | |
7380 | if ((*i)->get_parent() == destdnl->get_inode() && | |
7381 | !(*i)->is_locallock()) | |
7382 | mds->locker->xlock_import(*i); | |
7383 | ||
7384 | // hack: fix auth bit | |
7385 | in->state_set(CInode::STATE_AUTH); | |
7c673cae FG |
7386 | |
7387 | mdr->clear_ambiguous_auth(); | |
7388 | } | |
7389 | ||
7390 | if (destdn->is_auth()) { | |
7391 | in->pop_and_dirty_projected_inode(mdr->ls); | |
7392 | ||
7393 | } else { | |
7394 | // FIXME: fix up snaprealm! | |
7395 | } | |
7396 | } | |
7397 | ||
7398 | // src | |
7399 | if (srcdn->is_auth()) | |
7400 | srcdn->mark_dirty(mdr->more()->pvmap[srcdn], mdr->ls); | |
7401 | srcdn->pop_projected_linkage(); | |
7402 | if (mdr->is_slave() && !mdr->more()->slave_update_journaled) | |
7403 | assert(!srcdn->is_projected()); // no other projected | |
7404 | ||
7405 | // apply remaining projected inodes (nested) | |
7406 | mdr->apply(); | |
7407 | ||
7408 | // update subtree map? | |
7409 | if (destdnl->is_primary() && in->is_dir()) | |
224ce89b | 7410 | mdcache->adjust_subtree_after_rename(in, srcdn->get_dir(), true); |
7c673cae FG |
7411 | |
7412 | if (straydn && oldin->is_dir()) | |
7413 | mdcache->adjust_subtree_after_rename(oldin, destdn->get_dir(), true); | |
7414 | ||
7415 | // removing a new dn? | |
7416 | if (srcdn->is_auth()) | |
7417 | srcdn->get_dir()->try_remove_unlinked_dn(srcdn); | |
7418 | } | |
7419 | ||
7420 | ||
7421 | ||
7422 | // ------------ | |
7423 | // SLAVE | |
7424 | ||
7425 | class C_MDS_SlaveRenamePrep : public ServerLogContext { | |
7426 | CDentry *srcdn, *destdn, *straydn; | |
7427 | public: | |
7428 | C_MDS_SlaveRenamePrep(Server *s, MDRequestRef& m, CDentry *sr, CDentry *de, CDentry *st) : | |
7429 | ServerLogContext(s, m), srcdn(sr), destdn(de), straydn(st) {} | |
7430 | void finish(int r) override { | |
7431 | server->_logged_slave_rename(mdr, srcdn, destdn, straydn); | |
7432 | } | |
7433 | }; | |
7434 | ||
7435 | class C_MDS_SlaveRenameCommit : public ServerContext { | |
7436 | MDRequestRef mdr; | |
7437 | CDentry *srcdn, *destdn, *straydn; | |
7438 | public: | |
7439 | C_MDS_SlaveRenameCommit(Server *s, MDRequestRef& m, CDentry *sr, CDentry *de, CDentry *st) : | |
7440 | ServerContext(s), mdr(m), srcdn(sr), destdn(de), straydn(st) {} | |
7441 | void finish(int r) override { | |
7442 | server->_commit_slave_rename(mdr, r, srcdn, destdn, straydn); | |
7443 | } | |
7444 | }; | |
7445 | ||
7446 | class C_MDS_SlaveRenameSessionsFlushed : public ServerContext { | |
7447 | MDRequestRef mdr; | |
7448 | public: | |
7449 | C_MDS_SlaveRenameSessionsFlushed(Server *s, MDRequestRef& r) : | |
7450 | ServerContext(s), mdr(r) {} | |
7451 | void finish(int r) override { | |
7452 | server->_slave_rename_sessions_flushed(mdr); | |
7453 | } | |
7454 | }; | |
7455 | ||
7456 | /* This function DOES put the mdr->slave_request before returning*/ | |
7457 | void Server::handle_slave_rename_prep(MDRequestRef& mdr) | |
7458 | { | |
7459 | dout(10) << "handle_slave_rename_prep " << *mdr | |
7460 | << " " << mdr->slave_request->srcdnpath | |
7461 | << " to " << mdr->slave_request->destdnpath | |
7462 | << dendl; | |
31f18b77 FG |
7463 | |
7464 | if (mdr->slave_request->is_interrupted()) { | |
7465 | dout(10) << " slave request interrupted, sending noop reply" << dendl; | |
7466 | MMDSSlaveRequest *reply= new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_RENAMEPREPACK); | |
7467 | reply->mark_interrupted(); | |
7468 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
7469 | mdr->slave_request->put(); | |
7470 | mdr->slave_request = 0; | |
7471 | return; | |
7472 | } | |
7473 | ||
7c673cae FG |
7474 | // discover destdn |
7475 | filepath destpath(mdr->slave_request->destdnpath); | |
7476 | dout(10) << " dest " << destpath << dendl; | |
7477 | vector<CDentry*> trace; | |
7478 | int r = mdcache->path_traverse(mdr, NULL, NULL, destpath, &trace, NULL, MDS_TRAVERSE_DISCOVERXLOCK); | |
7479 | if (r > 0) return; | |
7480 | if (r == -ESTALE) { | |
7481 | mdcache->find_ino_peers(destpath.get_ino(), new C_MDS_RetryRequest(mdcache, mdr), | |
7482 | mdr->slave_to_mds); | |
7483 | return; | |
7484 | } | |
7485 | assert(r == 0); // we shouldn't get an error here! | |
7486 | ||
7487 | CDentry *destdn = trace[trace.size()-1]; | |
7488 | CDentry::linkage_t *destdnl = destdn->get_projected_linkage(); | |
7489 | dout(10) << " destdn " << *destdn << dendl; | |
7490 | mdr->pin(destdn); | |
7491 | ||
7492 | // discover srcdn | |
7493 | filepath srcpath(mdr->slave_request->srcdnpath); | |
7494 | dout(10) << " src " << srcpath << dendl; | |
7495 | CInode *srci = nullptr; | |
7496 | r = mdcache->path_traverse(mdr, NULL, NULL, srcpath, &trace, &srci, MDS_TRAVERSE_DISCOVERXLOCK); | |
7497 | if (r > 0) return; | |
7498 | assert(r == 0); | |
7499 | ||
7500 | // srcpath must not point to a null dentry | |
7501 | assert(srci != nullptr); | |
7502 | ||
7503 | CDentry *srcdn = trace[trace.size()-1]; | |
7504 | CDentry::linkage_t *srcdnl = srcdn->get_projected_linkage(); | |
7505 | dout(10) << " srcdn " << *srcdn << dendl; | |
7506 | mdr->pin(srcdn); | |
7507 | mdr->pin(srci); | |
7508 | ||
7509 | // stray? | |
7510 | bool linkmerge = (srcdnl->get_inode() == destdnl->get_inode() && | |
7511 | (srcdnl->is_primary() || destdnl->is_primary())); | |
7512 | CDentry *straydn = mdr->straydn; | |
7513 | if (destdnl->is_primary() && !linkmerge) | |
7514 | assert(straydn); | |
7515 | ||
7516 | mdr->set_op_stamp(mdr->slave_request->op_stamp); | |
7517 | mdr->more()->srcdn_auth_mds = srcdn->authority().first; | |
7518 | ||
7519 | // set up commit waiter (early, to clean up any freezing etc we do) | |
7520 | if (!mdr->more()->slave_commit) | |
7521 | mdr->more()->slave_commit = new C_MDS_SlaveRenameCommit(this, mdr, srcdn, destdn, straydn); | |
7522 | ||
7523 | // am i srcdn auth? | |
7524 | if (srcdn->is_auth()) { | |
7525 | set<mds_rank_t> srcdnrep; | |
7526 | srcdn->list_replicas(srcdnrep); | |
7527 | ||
7528 | bool reply_witness = false; | |
7529 | if (srcdnl->is_primary() && !srcdnl->get_inode()->state_test(CInode::STATE_AMBIGUOUSAUTH)) { | |
7530 | // freeze? | |
7531 | // we need this to | |
7532 | // - avoid conflicting lock state changes | |
7533 | // - avoid concurrent updates to the inode | |
7534 | // (this could also be accomplished with the versionlock) | |
7535 | int allowance = 2; // 1 for the mdr auth_pin, 1 for the link lock | |
7536 | allowance += srcdnl->get_inode()->is_dir(); // for the snap lock | |
7537 | dout(10) << " freezing srci " << *srcdnl->get_inode() << " with allowance " << allowance << dendl; | |
7538 | bool frozen_inode = srcdnl->get_inode()->freeze_inode(allowance); | |
7539 | ||
7540 | // unfreeze auth pin after freezing the inode to avoid queueing waiters | |
7541 | if (srcdnl->get_inode()->is_frozen_auth_pin()) | |
7542 | mdr->unfreeze_auth_pin(); | |
7543 | ||
7544 | if (!frozen_inode) { | |
7545 | srcdnl->get_inode()->add_waiter(CInode::WAIT_FROZEN, new C_MDS_RetryRequest(mdcache, mdr)); | |
7546 | return; | |
7547 | } | |
7548 | ||
7549 | /* | |
7550 | * set ambiguous auth for srci | |
7551 | * NOTE: we don't worry about ambiguous cache expire as we do | |
7552 | * with subtree migrations because all slaves will pin | |
7553 | * srcdn->get_inode() for duration of this rename. | |
7554 | */ | |
7555 | mdr->set_ambiguous_auth(srcdnl->get_inode()); | |
7556 | ||
7557 | // just mark the source inode as ambiguous auth if more than two MDS are involved. | |
7558 | // the master will send another OP_RENAMEPREP slave request later. | |
7559 | if (mdr->slave_request->witnesses.size() > 1) { | |
7560 | dout(10) << " set srci ambiguous auth; providing srcdn replica list" << dendl; | |
7561 | reply_witness = true; | |
7562 | } | |
7563 | ||
7564 | // make sure bystanders have received all lock related messages | |
7565 | for (set<mds_rank_t>::iterator p = srcdnrep.begin(); p != srcdnrep.end(); ++p) { | |
7566 | if (*p == mdr->slave_to_mds || | |
7567 | (mds->is_cluster_degraded() && | |
7568 | !mds->mdsmap->is_clientreplay_or_active_or_stopping(*p))) | |
7569 | continue; | |
7570 | MMDSSlaveRequest *notify = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
7571 | MMDSSlaveRequest::OP_RENAMENOTIFY); | |
7572 | mds->send_message_mds(notify, *p); | |
7573 | mdr->more()->waiting_on_slave.insert(*p); | |
7574 | } | |
7575 | ||
7576 | // make sure clients have received all cap related messages | |
7577 | set<client_t> export_client_set; | |
7578 | mdcache->migrator->get_export_client_set(srcdnl->get_inode(), export_client_set); | |
7579 | ||
7580 | MDSGatherBuilder gather(g_ceph_context); | |
7581 | flush_client_sessions(export_client_set, gather); | |
7582 | if (gather.has_subs()) { | |
7583 | mdr->more()->waiting_on_slave.insert(MDS_RANK_NONE); | |
7584 | gather.set_finisher(new C_MDS_SlaveRenameSessionsFlushed(this, mdr)); | |
7585 | gather.activate(); | |
7586 | } | |
7587 | } | |
7588 | ||
7589 | // is witness list sufficient? | |
7590 | for (set<mds_rank_t>::iterator p = srcdnrep.begin(); p != srcdnrep.end(); ++p) { | |
7591 | if (*p == mdr->slave_to_mds || | |
7592 | mdr->slave_request->witnesses.count(*p)) continue; | |
7593 | dout(10) << " witness list insufficient; providing srcdn replica list" << dendl; | |
7594 | reply_witness = true; | |
7595 | break; | |
7596 | } | |
7597 | ||
7598 | if (reply_witness) { | |
7599 | assert(!srcdnrep.empty()); | |
7600 | MMDSSlaveRequest *reply = new MMDSSlaveRequest(mdr->reqid, mdr->attempt, | |
7601 | MMDSSlaveRequest::OP_RENAMEPREPACK); | |
7602 | reply->witnesses.swap(srcdnrep); | |
7603 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
7604 | mdr->slave_request->put(); | |
7605 | mdr->slave_request = 0; | |
7606 | return; | |
7607 | } | |
7608 | dout(10) << " witness list sufficient: includes all srcdn replicas" << dendl; | |
7609 | if (!mdr->more()->waiting_on_slave.empty()) { | |
7610 | dout(10) << " still waiting for rename notify acks from " | |
7611 | << mdr->more()->waiting_on_slave << dendl; | |
7612 | return; | |
7613 | } | |
7614 | } else if (srcdnl->is_primary() && srcdn->authority() != destdn->authority()) { | |
7615 | // set ambiguous auth for srci on witnesses | |
7616 | mdr->set_ambiguous_auth(srcdnl->get_inode()); | |
7617 | } | |
7618 | ||
7619 | // encode everything we'd need to roll this back... basically, just the original state. | |
7620 | rename_rollback rollback; | |
7621 | ||
7622 | rollback.reqid = mdr->reqid; | |
7623 | ||
7624 | rollback.orig_src.dirfrag = srcdn->get_dir()->dirfrag(); | |
7625 | rollback.orig_src.dirfrag_old_mtime = srcdn->get_dir()->get_projected_fnode()->fragstat.mtime; | |
7626 | rollback.orig_src.dirfrag_old_rctime = srcdn->get_dir()->get_projected_fnode()->rstat.rctime; | |
7627 | rollback.orig_src.dname = srcdn->name; | |
7628 | if (srcdnl->is_primary()) | |
7629 | rollback.orig_src.ino = srcdnl->get_inode()->ino(); | |
7630 | else { | |
7631 | assert(srcdnl->is_remote()); | |
7632 | rollback.orig_src.remote_ino = srcdnl->get_remote_ino(); | |
7633 | rollback.orig_src.remote_d_type = srcdnl->get_remote_d_type(); | |
7634 | } | |
7635 | ||
7636 | rollback.orig_dest.dirfrag = destdn->get_dir()->dirfrag(); | |
7637 | rollback.orig_dest.dirfrag_old_mtime = destdn->get_dir()->get_projected_fnode()->fragstat.mtime; | |
7638 | rollback.orig_dest.dirfrag_old_rctime = destdn->get_dir()->get_projected_fnode()->rstat.rctime; | |
7639 | rollback.orig_dest.dname = destdn->name; | |
7640 | if (destdnl->is_primary()) | |
7641 | rollback.orig_dest.ino = destdnl->get_inode()->ino(); | |
7642 | else if (destdnl->is_remote()) { | |
7643 | rollback.orig_dest.remote_ino = destdnl->get_remote_ino(); | |
7644 | rollback.orig_dest.remote_d_type = destdnl->get_remote_d_type(); | |
7645 | } | |
7646 | ||
7647 | if (straydn) { | |
7648 | rollback.stray.dirfrag = straydn->get_dir()->dirfrag(); | |
7649 | rollback.stray.dirfrag_old_mtime = straydn->get_dir()->get_projected_fnode()->fragstat.mtime; | |
7650 | rollback.stray.dirfrag_old_rctime = straydn->get_dir()->get_projected_fnode()->rstat.rctime; | |
7651 | rollback.stray.dname = straydn->name; | |
7652 | } | |
7653 | ::encode(rollback, mdr->more()->rollback_bl); | |
7654 | dout(20) << " rollback is " << mdr->more()->rollback_bl.length() << " bytes" << dendl; | |
7655 | ||
7656 | // journal. | |
7657 | mdr->ls = mdlog->get_current_segment(); | |
7658 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_prep", mdr->reqid, mdr->slave_to_mds, | |
7659 | ESlaveUpdate::OP_PREPARE, ESlaveUpdate::RENAME); | |
7660 | mdlog->start_entry(le); | |
7661 | le->rollback = mdr->more()->rollback_bl; | |
7662 | ||
7663 | bufferlist blah; // inode import data... obviously not used if we're the slave | |
7664 | _rename_prepare(mdr, &le->commit, &blah, srcdn, destdn, straydn); | |
7665 | ||
7666 | if (le->commit.empty()) { | |
7667 | dout(10) << " empty metablob, skipping journal" << dendl; | |
7668 | mdlog->cancel_entry(le); | |
7669 | mdr->ls = NULL; | |
7670 | _logged_slave_rename(mdr, srcdn, destdn, straydn); | |
7671 | } else { | |
7672 | mdr->more()->slave_update_journaled = true; | |
7673 | submit_mdlog_entry(le, new C_MDS_SlaveRenamePrep(this, mdr, srcdn, destdn, straydn), | |
7674 | mdr, __func__); | |
7675 | mdlog->flush(); | |
7676 | } | |
7677 | } | |
7678 | ||
7679 | void Server::_logged_slave_rename(MDRequestRef& mdr, | |
7680 | CDentry *srcdn, CDentry *destdn, CDentry *straydn) | |
7681 | { | |
7682 | dout(10) << "_logged_slave_rename " << *mdr << dendl; | |
7683 | ||
7684 | // prepare ack | |
7685 | MMDSSlaveRequest *reply = NULL; | |
7686 | if (!mdr->aborted) { | |
7687 | reply= new MMDSSlaveRequest(mdr->reqid, mdr->attempt, MMDSSlaveRequest::OP_RENAMEPREPACK); | |
7688 | if (!mdr->more()->slave_update_journaled) | |
7689 | reply->mark_not_journaled(); | |
7690 | } | |
7691 | ||
7692 | CDentry::linkage_t *srcdnl = srcdn->get_linkage(); | |
7693 | CDentry::linkage_t *destdnl = NULL; | |
7694 | //CDentry::linkage_t *straydnl = straydn ? straydn->get_linkage() : 0; | |
7695 | ||
7696 | // export srci? | |
7697 | if (srcdn->is_auth() && srcdnl->is_primary()) { | |
7698 | // set export bounds for CInode::encode_export() | |
7699 | list<CDir*> bounds; | |
7700 | if (srcdnl->get_inode()->is_dir()) { | |
7701 | srcdnl->get_inode()->get_dirfrags(bounds); | |
7702 | for (list<CDir*>::iterator p = bounds.begin(); p != bounds.end(); ++p) | |
7703 | (*p)->state_set(CDir::STATE_EXPORTBOUND); | |
7704 | } | |
7705 | ||
7706 | map<client_t,entity_inst_t> exported_client_map; | |
7707 | bufferlist inodebl; | |
7708 | mdcache->migrator->encode_export_inode(srcdnl->get_inode(), inodebl, | |
7709 | exported_client_map); | |
7710 | ||
7711 | for (list<CDir*>::iterator p = bounds.begin(); p != bounds.end(); ++p) | |
7712 | (*p)->state_clear(CDir::STATE_EXPORTBOUND); | |
7713 | ||
7714 | if (reply) { | |
7715 | ::encode(exported_client_map, reply->inode_export, mds->mdsmap->get_up_features()); | |
7716 | reply->inode_export.claim_append(inodebl); | |
7717 | reply->inode_export_v = srcdnl->get_inode()->inode.version; | |
7718 | } | |
7719 | ||
7720 | // remove mdr auth pin | |
7721 | mdr->auth_unpin(srcdnl->get_inode()); | |
7722 | mdr->more()->is_inode_exporter = true; | |
7723 | ||
7724 | if (srcdnl->get_inode()->is_dirty()) | |
7725 | srcdnl->get_inode()->mark_clean(); | |
7726 | ||
7727 | dout(10) << " exported srci " << *srcdnl->get_inode() << dendl; | |
7728 | } | |
7729 | ||
7730 | // apply | |
7731 | _rename_apply(mdr, srcdn, destdn, straydn); | |
7732 | ||
7733 | destdnl = destdn->get_linkage(); | |
7734 | ||
7735 | // bump popularity | |
7736 | mds->balancer->hit_dir(mdr->get_mds_stamp(), srcdn->get_dir(), META_POP_IWR); | |
7737 | if (destdnl->get_inode() && destdnl->get_inode()->is_auth()) | |
7738 | mds->balancer->hit_inode(mdr->get_mds_stamp(), destdnl->get_inode(), | |
7739 | META_POP_IWR); | |
7740 | ||
7741 | // done. | |
7742 | mdr->slave_request->put(); | |
7743 | mdr->slave_request = 0; | |
7744 | mdr->straydn = 0; | |
7745 | ||
7746 | if (reply) { | |
7747 | mds->send_message_mds(reply, mdr->slave_to_mds); | |
7748 | } else { | |
7749 | assert(mdr->aborted); | |
7750 | dout(10) << " abort flag set, finishing" << dendl; | |
7751 | mdcache->request_finish(mdr); | |
7752 | } | |
7753 | } | |
7754 | ||
7755 | void Server::_commit_slave_rename(MDRequestRef& mdr, int r, | |
7756 | CDentry *srcdn, CDentry *destdn, CDentry *straydn) | |
7757 | { | |
7758 | dout(10) << "_commit_slave_rename " << *mdr << " r=" << r << dendl; | |
7759 | ||
7760 | CDentry::linkage_t *destdnl = destdn->get_linkage(); | |
7761 | ||
7762 | list<MDSInternalContextBase*> finished; | |
7763 | if (r == 0) { | |
7764 | // unfreeze+singleauth inode | |
7765 | // hmm, do i really need to delay this? | |
7766 | if (mdr->more()->is_inode_exporter) { | |
7767 | ||
7768 | CInode *in = destdnl->get_inode(); | |
7769 | ||
7770 | // drop our pins | |
7771 | // we exported, clear out any xlocks that we moved to another MDS | |
7772 | set<SimpleLock*>::iterator i = mdr->xlocks.begin(); | |
7773 | while (i != mdr->xlocks.end()) { | |
7774 | SimpleLock *lock = *i++; | |
7775 | ||
7776 | // we only care about xlocks on the exported inode | |
7777 | if (lock->get_parent() == in && | |
7778 | !lock->is_locallock()) | |
7779 | mds->locker->xlock_export(lock, mdr.get()); | |
7780 | } | |
7781 | ||
7782 | map<client_t,Capability::Import> peer_imported; | |
7783 | bufferlist::iterator bp = mdr->more()->inode_import.begin(); | |
7784 | ::decode(peer_imported, bp); | |
7785 | ||
7786 | dout(10) << " finishing inode export on " << *destdnl->get_inode() << dendl; | |
7787 | mdcache->migrator->finish_export_inode(destdnl->get_inode(), | |
7788 | mdr->get_mds_stamp(), | |
7789 | mdr->slave_to_mds, peer_imported, finished); | |
7790 | mds->queue_waiters(finished); // this includes SINGLEAUTH waiters. | |
7791 | ||
7792 | // unfreeze | |
7793 | assert(destdnl->get_inode()->is_frozen_inode()); | |
7794 | destdnl->get_inode()->unfreeze_inode(finished); | |
7795 | } | |
7796 | ||
7797 | // singleauth | |
7798 | if (mdr->more()->is_ambiguous_auth) { | |
7799 | mdr->more()->rename_inode->clear_ambiguous_auth(finished); | |
7800 | mdr->more()->is_ambiguous_auth = false; | |
7801 | } | |
7802 | ||
31f18b77 FG |
7803 | if (straydn && mdr->more()->slave_update_journaled) { |
7804 | CInode *strayin = straydn->get_projected_linkage()->get_inode(); | |
7805 | if (strayin && !strayin->snaprealm) | |
7806 | mdcache->clear_dirty_bits_for_stray(strayin); | |
7807 | } | |
7c673cae FG |
7808 | |
7809 | mds->queue_waiters(finished); | |
7810 | mdr->cleanup(); | |
7811 | ||
7812 | if (mdr->more()->slave_update_journaled) { | |
7813 | // write a commit to the journal | |
7814 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_commit", mdr->reqid, | |
7815 | mdr->slave_to_mds, ESlaveUpdate::OP_COMMIT, | |
7816 | ESlaveUpdate::RENAME); | |
7817 | mdlog->start_entry(le); | |
7818 | submit_mdlog_entry(le, new C_MDS_CommittedSlave(this, mdr), mdr, __func__); | |
7819 | mdlog->flush(); | |
7820 | } else { | |
7821 | _committed_slave(mdr); | |
7822 | } | |
7823 | } else { | |
7824 | ||
7825 | // abort | |
7826 | // rollback_bl may be empty if we froze the inode but had to provide an expanded | |
7827 | // witness list from the master, and they failed before we tried prep again. | |
7828 | if (mdr->more()->rollback_bl.length()) { | |
7829 | if (mdr->more()->is_inode_exporter) { | |
7830 | dout(10) << " reversing inode export of " << *destdnl->get_inode() << dendl; | |
7831 | destdnl->get_inode()->abort_export(); | |
7832 | } | |
7833 | if (mdcache->is_ambiguous_slave_update(mdr->reqid, mdr->slave_to_mds)) { | |
7834 | mdcache->remove_ambiguous_slave_update(mdr->reqid, mdr->slave_to_mds); | |
7835 | // rollback but preserve the slave request | |
7836 | do_rename_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr, false); | |
7837 | mdr->more()->rollback_bl.clear(); | |
7838 | } else | |
7839 | do_rename_rollback(mdr->more()->rollback_bl, mdr->slave_to_mds, mdr, true); | |
7840 | } else { | |
7841 | dout(10) << " rollback_bl empty, not rollback back rename (master failed after getting extra witnesses?)" << dendl; | |
7842 | // singleauth | |
7843 | if (mdr->more()->is_ambiguous_auth) { | |
7844 | if (srcdn->is_auth()) | |
7845 | mdr->more()->rename_inode->unfreeze_inode(finished); | |
7846 | ||
7847 | mdr->more()->rename_inode->clear_ambiguous_auth(finished); | |
7848 | mdr->more()->is_ambiguous_auth = false; | |
7849 | } | |
7850 | mds->queue_waiters(finished); | |
7851 | mdcache->request_finish(mdr); | |
7852 | } | |
7853 | } | |
7854 | } | |
7855 | ||
7856 | void _rollback_repair_dir(MutationRef& mut, CDir *dir, rename_rollback::drec &r, utime_t ctime, | |
7857 | bool isdir, int linkunlink, nest_info_t &rstat) | |
7858 | { | |
7859 | fnode_t *pf; | |
7860 | pf = dir->project_fnode(); | |
7861 | mut->add_projected_fnode(dir); | |
7862 | pf->version = dir->pre_dirty(); | |
7863 | ||
7864 | if (isdir) { | |
7865 | pf->fragstat.nsubdirs += linkunlink; | |
7866 | } else { | |
7867 | pf->fragstat.nfiles += linkunlink; | |
7868 | } | |
7869 | if (r.ino) { | |
7870 | pf->rstat.rbytes += linkunlink * rstat.rbytes; | |
7871 | pf->rstat.rfiles += linkunlink * rstat.rfiles; | |
7872 | pf->rstat.rsubdirs += linkunlink * rstat.rsubdirs; | |
7873 | pf->rstat.rsnaprealms += linkunlink * rstat.rsnaprealms; | |
7874 | } | |
7875 | if (pf->fragstat.mtime == ctime) { | |
7876 | pf->fragstat.mtime = r.dirfrag_old_mtime; | |
7877 | if (pf->rstat.rctime == ctime) | |
7878 | pf->rstat.rctime = r.dirfrag_old_rctime; | |
7879 | } | |
7880 | mut->add_updated_lock(&dir->get_inode()->filelock); | |
7881 | mut->add_updated_lock(&dir->get_inode()->nestlock); | |
7882 | } | |
7883 | ||
7884 | struct C_MDS_LoggedRenameRollback : public ServerLogContext { | |
7885 | MutationRef mut; | |
7886 | CDentry *srcdn; | |
7887 | version_t srcdnpv; | |
7888 | CDentry *destdn; | |
7889 | CDentry *straydn; | |
7890 | bool finish_mdr; | |
7891 | C_MDS_LoggedRenameRollback(Server *s, MutationRef& m, MDRequestRef& r, | |
7892 | CDentry *sd, version_t pv, CDentry *dd, | |
7893 | CDentry *st, bool f) : | |
7894 | ServerLogContext(s, r), mut(m), srcdn(sd), srcdnpv(pv), destdn(dd), | |
7895 | straydn(st), finish_mdr(f) {} | |
7896 | void finish(int r) override { | |
7897 | server->_rename_rollback_finish(mut, mdr, srcdn, srcdnpv, | |
7898 | destdn, straydn, finish_mdr); | |
7899 | } | |
7900 | }; | |
7901 | ||
7902 | void Server::do_rename_rollback(bufferlist &rbl, mds_rank_t master, MDRequestRef& mdr, | |
7903 | bool finish_mdr) | |
7904 | { | |
7905 | rename_rollback rollback; | |
7906 | bufferlist::iterator p = rbl.begin(); | |
7907 | ::decode(rollback, p); | |
7908 | ||
7909 | dout(10) << "do_rename_rollback on " << rollback.reqid << dendl; | |
7910 | // need to finish this update before sending resolve to claim the subtree | |
7911 | mdcache->add_rollback(rollback.reqid, master); | |
7912 | ||
7913 | MutationRef mut(new MutationImpl(nullptr, utime_t(), rollback.reqid)); | |
7914 | mut->ls = mds->mdlog->get_current_segment(); | |
7915 | ||
7916 | CDentry *srcdn = NULL; | |
7917 | CDir *srcdir = mdcache->get_dirfrag(rollback.orig_src.dirfrag); | |
7918 | if (!srcdir) | |
7919 | srcdir = mdcache->get_dirfrag(rollback.orig_src.dirfrag.ino, rollback.orig_src.dname); | |
7920 | if (srcdir) { | |
7921 | dout(10) << " srcdir " << *srcdir << dendl; | |
7922 | srcdn = srcdir->lookup(rollback.orig_src.dname); | |
7923 | if (srcdn) { | |
7924 | dout(10) << " srcdn " << *srcdn << dendl; | |
7925 | assert(srcdn->get_linkage()->is_null()); | |
7926 | } else | |
7927 | dout(10) << " srcdn not found" << dendl; | |
7928 | } else | |
7929 | dout(10) << " srcdir not found" << dendl; | |
7930 | ||
7931 | CDentry *destdn = NULL; | |
7932 | CDir *destdir = mdcache->get_dirfrag(rollback.orig_dest.dirfrag); | |
7933 | if (!destdir) | |
7934 | destdir = mdcache->get_dirfrag(rollback.orig_dest.dirfrag.ino, rollback.orig_dest.dname); | |
7935 | if (destdir) { | |
7936 | dout(10) << " destdir " << *destdir << dendl; | |
7937 | destdn = destdir->lookup(rollback.orig_dest.dname); | |
7938 | if (destdn) | |
7939 | dout(10) << " destdn " << *destdn << dendl; | |
7940 | else | |
7941 | dout(10) << " destdn not found" << dendl; | |
7942 | } else | |
7943 | dout(10) << " destdir not found" << dendl; | |
7944 | ||
7945 | CInode *in = NULL; | |
7946 | if (rollback.orig_src.ino) { | |
7947 | in = mdcache->get_inode(rollback.orig_src.ino); | |
7948 | if (in && in->is_dir()) | |
7949 | assert(srcdn && destdn); | |
7950 | } else | |
7951 | in = mdcache->get_inode(rollback.orig_src.remote_ino); | |
7952 | ||
7953 | CDir *straydir = NULL; | |
7954 | CDentry *straydn = NULL; | |
7955 | if (rollback.stray.dirfrag.ino) { | |
7956 | straydir = mdcache->get_dirfrag(rollback.stray.dirfrag); | |
7957 | if (straydir) { | |
7958 | dout(10) << "straydir " << *straydir << dendl; | |
7959 | straydn = straydir->lookup(rollback.stray.dname); | |
7960 | if (straydn) { | |
7961 | dout(10) << " straydn " << *straydn << dendl; | |
7962 | assert(straydn->get_linkage()->is_primary()); | |
7963 | } else | |
7964 | dout(10) << " straydn not found" << dendl; | |
7965 | } else | |
7966 | dout(10) << "straydir not found" << dendl; | |
7967 | } | |
7968 | ||
7969 | CInode *target = NULL; | |
7970 | if (rollback.orig_dest.ino) { | |
7971 | target = mdcache->get_inode(rollback.orig_dest.ino); | |
7972 | if (target) | |
7973 | assert(destdn && straydn); | |
7974 | } else if (rollback.orig_dest.remote_ino) | |
7975 | target = mdcache->get_inode(rollback.orig_dest.remote_ino); | |
7976 | ||
7977 | // can't use is_auth() in the resolve stage | |
7978 | mds_rank_t whoami = mds->get_nodeid(); | |
7979 | // slave | |
7980 | assert(!destdn || destdn->authority().first != whoami); | |
7981 | assert(!straydn || straydn->authority().first != whoami); | |
7982 | ||
7983 | bool force_journal_src = false; | |
7984 | bool force_journal_dest = false; | |
7985 | if (in && in->is_dir() && srcdn->authority().first != whoami) | |
7986 | force_journal_src = _need_force_journal(in, false); | |
7987 | if (in && target && target->is_dir()) | |
7988 | force_journal_dest = _need_force_journal(in, true); | |
7989 | ||
7990 | version_t srcdnpv = 0; | |
7991 | // repair src | |
7992 | if (srcdn) { | |
7993 | if (srcdn->authority().first == whoami) | |
7994 | srcdnpv = srcdn->pre_dirty(); | |
7995 | if (rollback.orig_src.ino) { | |
7996 | assert(in); | |
7997 | srcdn->push_projected_linkage(in); | |
7998 | } else | |
7999 | srcdn->push_projected_linkage(rollback.orig_src.remote_ino, | |
8000 | rollback.orig_src.remote_d_type); | |
8001 | } | |
8002 | ||
8003 | inode_t *pi = 0; | |
8004 | if (in) { | |
8005 | if (in->authority().first == whoami) { | |
8006 | pi = in->project_inode(); | |
8007 | mut->add_projected_inode(in); | |
8008 | pi->version = in->pre_dirty(); | |
8009 | } else | |
8010 | pi = in->get_projected_inode(); | |
8011 | if (pi->ctime == rollback.ctime) | |
8012 | pi->ctime = rollback.orig_src.old_ctime; | |
8013 | } | |
8014 | ||
8015 | if (srcdn && srcdn->authority().first == whoami) { | |
8016 | nest_info_t blah; | |
8017 | _rollback_repair_dir(mut, srcdir, rollback.orig_src, rollback.ctime, | |
8018 | in ? in->is_dir() : false, 1, pi ? pi->accounted_rstat : blah); | |
8019 | } | |
8020 | ||
8021 | // repair dest | |
8022 | if (destdn) { | |
8023 | if (rollback.orig_dest.ino && target) { | |
8024 | destdn->push_projected_linkage(target); | |
8025 | } else if (rollback.orig_dest.remote_ino) { | |
8026 | destdn->push_projected_linkage(rollback.orig_dest.remote_ino, | |
8027 | rollback.orig_dest.remote_d_type); | |
8028 | } else { | |
8029 | // the dentry will be trimmed soon, it's ok to have wrong linkage | |
8030 | if (rollback.orig_dest.ino) | |
8031 | assert(mds->is_resolve()); | |
8032 | destdn->push_projected_linkage(); | |
8033 | } | |
8034 | } | |
8035 | ||
8036 | if (straydn) | |
8037 | straydn->push_projected_linkage(); | |
8038 | ||
8039 | if (target) { | |
8040 | inode_t *ti = NULL; | |
8041 | if (target->authority().first == whoami) { | |
8042 | ti = target->project_inode(); | |
8043 | mut->add_projected_inode(target); | |
8044 | ti->version = target->pre_dirty(); | |
8045 | } else | |
8046 | ti = target->get_projected_inode(); | |
8047 | if (ti->ctime == rollback.ctime) | |
8048 | ti->ctime = rollback.orig_dest.old_ctime; | |
8049 | if (MDS_INO_IS_STRAY(rollback.orig_src.dirfrag.ino)) { | |
8050 | if (MDS_INO_IS_STRAY(rollback.orig_dest.dirfrag.ino)) | |
8051 | assert(!rollback.orig_dest.ino && !rollback.orig_dest.remote_ino); | |
8052 | else | |
8053 | assert(rollback.orig_dest.remote_ino && | |
8054 | rollback.orig_dest.remote_ino == rollback.orig_src.ino); | |
8055 | } else | |
8056 | ti->nlink++; | |
8057 | } | |
8058 | ||
8059 | if (srcdn) | |
8060 | dout(0) << " srcdn back to " << *srcdn << dendl; | |
8061 | if (in) | |
8062 | dout(0) << " srci back to " << *in << dendl; | |
8063 | if (destdn) | |
8064 | dout(0) << " destdn back to " << *destdn << dendl; | |
8065 | if (target) | |
8066 | dout(0) << " desti back to " << *target << dendl; | |
8067 | ||
8068 | // journal it | |
8069 | ESlaveUpdate *le = new ESlaveUpdate(mdlog, "slave_rename_rollback", rollback.reqid, master, | |
8070 | ESlaveUpdate::OP_ROLLBACK, ESlaveUpdate::RENAME); | |
8071 | mdlog->start_entry(le); | |
8072 | ||
8073 | if (srcdn && (srcdn->authority().first == whoami || force_journal_src)) { | |
8074 | le->commit.add_dir_context(srcdir); | |
8075 | if (rollback.orig_src.ino) | |
8076 | le->commit.add_primary_dentry(srcdn, 0, true); | |
8077 | else | |
8078 | le->commit.add_remote_dentry(srcdn, true); | |
8079 | } | |
8080 | ||
8081 | if (!rollback.orig_src.ino && // remote linkage | |
8082 | in && in->authority().first == whoami) { | |
8083 | le->commit.add_dir_context(in->get_projected_parent_dir()); | |
8084 | le->commit.add_primary_dentry(in->get_projected_parent_dn(), in, true); | |
8085 | } | |
8086 | ||
8087 | if (force_journal_dest) { | |
8088 | assert(rollback.orig_dest.ino); | |
8089 | le->commit.add_dir_context(destdir); | |
8090 | le->commit.add_primary_dentry(destdn, 0, true); | |
8091 | } | |
8092 | ||
8093 | // slave: no need to journal straydn | |
8094 | ||
8095 | if (target && target != in && target->authority().first == whoami) { | |
8096 | assert(rollback.orig_dest.remote_ino); | |
8097 | le->commit.add_dir_context(target->get_projected_parent_dir()); | |
8098 | le->commit.add_primary_dentry(target->get_projected_parent_dn(), target, true); | |
8099 | } | |
8100 | ||
8101 | if (in && in->is_dir() && (srcdn->authority().first == whoami || force_journal_src)) { | |
8102 | dout(10) << " noting renamed dir ino " << in->ino() << " in metablob" << dendl; | |
8103 | le->commit.renamed_dirino = in->ino(); | |
8104 | if (srcdn->authority().first == whoami) { | |
8105 | list<CDir*> ls; | |
8106 | in->get_dirfrags(ls); | |
8107 | for (list<CDir*>::iterator p = ls.begin(); p != ls.end(); ++p) { | |
8108 | CDir *dir = *p; | |
8109 | if (!dir->is_auth()) | |
8110 | le->commit.renamed_dir_frags.push_back(dir->get_frag()); | |
8111 | } | |
8112 | dout(10) << " noting renamed dir open frags " << le->commit.renamed_dir_frags << dendl; | |
8113 | } | |
8114 | } else if (force_journal_dest) { | |
8115 | dout(10) << " noting rename target ino " << target->ino() << " in metablob" << dendl; | |
8116 | le->commit.renamed_dirino = target->ino(); | |
8117 | } | |
8118 | ||
8119 | if (target && target->is_dir()) { | |
8120 | assert(destdn); | |
8121 | mdcache->project_subtree_rename(target, straydir, destdir); | |
8122 | } | |
8123 | ||
8124 | if (in && in->is_dir()) { | |
8125 | assert(srcdn); | |
8126 | mdcache->project_subtree_rename(in, destdir, srcdir); | |
8127 | } | |
8128 | ||
8129 | if (mdr && !mdr->more()->slave_update_journaled) { | |
8130 | assert(le->commit.empty()); | |
8131 | mdlog->cancel_entry(le); | |
8132 | mut->ls = NULL; | |
8133 | _rename_rollback_finish(mut, mdr, srcdn, srcdnpv, destdn, straydn, finish_mdr); | |
8134 | } else { | |
8135 | assert(!le->commit.empty()); | |
8136 | if (mdr) | |
8137 | mdr->more()->slave_update_journaled = false; | |
8138 | MDSLogContextBase *fin = new C_MDS_LoggedRenameRollback(this, mut, mdr, srcdn, srcdnpv, | |
8139 | destdn, straydn, finish_mdr); | |
8140 | submit_mdlog_entry(le, fin, mdr, __func__); | |
8141 | mdlog->flush(); | |
8142 | } | |
8143 | } | |
8144 | ||
8145 | void Server::_rename_rollback_finish(MutationRef& mut, MDRequestRef& mdr, CDentry *srcdn, | |
8146 | version_t srcdnpv, CDentry *destdn, | |
8147 | CDentry *straydn, bool finish_mdr) | |
8148 | { | |
8149 | dout(10) << "_rename_rollback_finish " << mut->reqid << dendl; | |
8150 | ||
8151 | if (straydn) { | |
8152 | straydn->get_dir()->unlink_inode(straydn); | |
8153 | straydn->pop_projected_linkage(); | |
8154 | } | |
8155 | if (destdn) { | |
8156 | destdn->get_dir()->unlink_inode(destdn); | |
8157 | destdn->pop_projected_linkage(); | |
8158 | } | |
8159 | if (srcdn) { | |
8160 | srcdn->pop_projected_linkage(); | |
8161 | if (srcdn->authority().first == mds->get_nodeid()) | |
8162 | srcdn->mark_dirty(srcdnpv, mut->ls); | |
8163 | } | |
8164 | ||
8165 | mut->apply(); | |
8166 | ||
8167 | if (srcdn && srcdn->get_linkage()->is_primary()) { | |
8168 | CInode *in = srcdn->get_linkage()->get_inode(); | |
8169 | if (srcdn->authority().first == mds->get_nodeid()) | |
8170 | in->state_set(CInode::STATE_AUTH); | |
8171 | // update subtree map? | |
8172 | if (in && in->is_dir()) { | |
8173 | assert(destdn); | |
8174 | mdcache->adjust_subtree_after_rename(in, destdn->get_dir(), true); | |
8175 | } | |
8176 | } | |
8177 | ||
8178 | if (destdn) { | |
8179 | CInode *oldin = destdn->get_linkage()->get_inode(); | |
8180 | // update subtree map? | |
8181 | if (oldin && oldin->is_dir()) { | |
8182 | assert(straydn); | |
8183 | mdcache->adjust_subtree_after_rename(oldin, straydn->get_dir(), true); | |
8184 | } | |
8185 | } | |
8186 | ||
8187 | if (mds->is_resolve()) { | |
8188 | CDir *root = NULL; | |
8189 | if (straydn) | |
8190 | root = mdcache->get_subtree_root(straydn->get_dir()); | |
8191 | else if (destdn) | |
8192 | root = mdcache->get_subtree_root(destdn->get_dir()); | |
8193 | if (root) | |
8194 | mdcache->try_trim_non_auth_subtree(root); | |
8195 | } | |
8196 | ||
8197 | if (mdr) { | |
8198 | list<MDSInternalContextBase*> finished; | |
8199 | if (mdr->more()->is_ambiguous_auth) { | |
8200 | if (srcdn->is_auth()) | |
8201 | mdr->more()->rename_inode->unfreeze_inode(finished); | |
8202 | ||
8203 | mdr->more()->rename_inode->clear_ambiguous_auth(finished); | |
8204 | mdr->more()->is_ambiguous_auth = false; | |
8205 | } | |
8206 | mds->queue_waiters(finished); | |
8207 | if (finish_mdr || mdr->aborted) | |
8208 | mdcache->request_finish(mdr); | |
8209 | else | |
8210 | mdr->more()->slave_rolling_back = false; | |
8211 | } | |
8212 | ||
8213 | mdcache->finish_rollback(mut->reqid); | |
8214 | ||
8215 | mut->cleanup(); | |
8216 | } | |
8217 | ||
8218 | /* This function DOES put the passed message before returning*/ | |
8219 | void Server::handle_slave_rename_prep_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack) | |
8220 | { | |
8221 | dout(10) << "handle_slave_rename_prep_ack " << *mdr | |
8222 | << " witnessed by " << ack->get_source() | |
8223 | << " " << *ack << dendl; | |
8224 | mds_rank_t from = mds_rank_t(ack->get_source().num()); | |
8225 | ||
8226 | // note slave | |
8227 | mdr->more()->slaves.insert(from); | |
8228 | if (mdr->more()->srcdn_auth_mds == from && | |
8229 | mdr->more()->is_remote_frozen_authpin && | |
8230 | !mdr->more()->is_ambiguous_auth) { | |
8231 | mdr->set_ambiguous_auth(mdr->more()->rename_inode); | |
8232 | } | |
8233 | ||
8234 | // witnessed? or add extra witnesses? | |
8235 | assert(mdr->more()->witnessed.count(from) == 0); | |
31f18b77 FG |
8236 | if (ack->is_interrupted()) { |
8237 | dout(10) << " slave request interrupted, noop" << dendl; | |
8238 | } else if (ack->witnesses.empty()) { | |
7c673cae FG |
8239 | mdr->more()->witnessed.insert(from); |
8240 | if (!ack->is_not_journaled()) | |
8241 | mdr->more()->has_journaled_slaves = true; | |
8242 | } else { | |
8243 | dout(10) << " extra witnesses (srcdn replicas) are " << ack->witnesses << dendl; | |
8244 | mdr->more()->extra_witnesses.swap(ack->witnesses); | |
8245 | mdr->more()->extra_witnesses.erase(mds->get_nodeid()); // not me! | |
8246 | } | |
8247 | ||
8248 | // srci import? | |
8249 | if (ack->inode_export.length()) { | |
8250 | dout(10) << " got srci import" << dendl; | |
8251 | mdr->more()->inode_import.claim(ack->inode_export); | |
8252 | mdr->more()->inode_import_v = ack->inode_export_v; | |
8253 | } | |
8254 | ||
8255 | // remove from waiting list | |
8256 | assert(mdr->more()->waiting_on_slave.count(from)); | |
8257 | mdr->more()->waiting_on_slave.erase(from); | |
8258 | ||
8259 | if (mdr->more()->waiting_on_slave.empty()) | |
8260 | dispatch_client_request(mdr); // go again! | |
8261 | else | |
8262 | dout(10) << "still waiting on slaves " << mdr->more()->waiting_on_slave << dendl; | |
8263 | } | |
8264 | ||
8265 | void Server::handle_slave_rename_notify_ack(MDRequestRef& mdr, MMDSSlaveRequest *ack) | |
8266 | { | |
8267 | dout(10) << "handle_slave_rename_notify_ack " << *mdr << " from mds." | |
8268 | << ack->get_source() << dendl; | |
8269 | assert(mdr->is_slave()); | |
8270 | mds_rank_t from = mds_rank_t(ack->get_source().num()); | |
8271 | ||
8272 | if (mdr->more()->waiting_on_slave.count(from)) { | |
8273 | mdr->more()->waiting_on_slave.erase(from); | |
8274 | ||
8275 | if (mdr->more()->waiting_on_slave.empty()) { | |
8276 | if (mdr->slave_request) | |
8277 | dispatch_slave_request(mdr); | |
8278 | } else | |
8279 | dout(10) << " still waiting for rename notify acks from " | |
8280 | << mdr->more()->waiting_on_slave << dendl; | |
8281 | } | |
8282 | } | |
8283 | ||
8284 | void Server::_slave_rename_sessions_flushed(MDRequestRef& mdr) | |
8285 | { | |
8286 | dout(10) << "_slave_rename_sessions_flushed " << *mdr << dendl; | |
8287 | ||
8288 | if (mdr->more()->waiting_on_slave.count(MDS_RANK_NONE)) { | |
8289 | mdr->more()->waiting_on_slave.erase(MDS_RANK_NONE); | |
8290 | ||
8291 | if (mdr->more()->waiting_on_slave.empty()) { | |
8292 | if (mdr->slave_request) | |
8293 | dispatch_slave_request(mdr); | |
8294 | } else | |
8295 | dout(10) << " still waiting for rename notify acks from " | |
8296 | << mdr->more()->waiting_on_slave << dendl; | |
8297 | } | |
8298 | } | |
8299 | ||
8300 | // snaps | |
8301 | /* This function takes responsibility for the passed mdr*/ | |
8302 | void Server::handle_client_lssnap(MDRequestRef& mdr) | |
8303 | { | |
8304 | MClientRequest *req = mdr->client_request; | |
8305 | ||
8306 | // traverse to path | |
8307 | CInode *diri = mdcache->get_inode(req->get_filepath().get_ino()); | |
8308 | if (!diri || diri->state_test(CInode::STATE_PURGING)) { | |
8309 | respond_to_request(mdr, -ESTALE); | |
8310 | return; | |
8311 | } | |
8312 | if (!diri->is_auth()) { | |
8313 | mdcache->request_forward(mdr, diri->authority().first); | |
8314 | return; | |
8315 | } | |
8316 | if (!diri->is_dir()) { | |
8317 | respond_to_request(mdr, -ENOTDIR); | |
8318 | return; | |
8319 | } | |
8320 | dout(10) << "lssnap on " << *diri << dendl; | |
8321 | ||
8322 | // lock snap | |
8323 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
8324 | mds->locker->include_snap_rdlocks(rdlocks, diri); | |
8325 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
8326 | return; | |
8327 | ||
8328 | if (!check_access(mdr, diri, MAY_READ)) | |
8329 | return; | |
8330 | ||
8331 | SnapRealm *realm = diri->find_snaprealm(); | |
8332 | map<snapid_t,SnapInfo*> infomap; | |
8333 | realm->get_snap_info(infomap, diri->get_oldest_snap()); | |
8334 | ||
8335 | unsigned max_entries = req->head.args.readdir.max_entries; | |
8336 | if (!max_entries) | |
8337 | max_entries = infomap.size(); | |
8338 | int max_bytes = req->head.args.readdir.max_bytes; | |
8339 | if (!max_bytes) | |
8340 | // make sure at least one item can be encoded | |
8341 | max_bytes = (512 << 10) + g_conf->mds_max_xattr_pairs_size; | |
8342 | ||
8343 | __u64 last_snapid = 0; | |
8344 | string offset_str = req->get_path2(); | |
8345 | if (!offset_str.empty()) | |
8346 | last_snapid = realm->resolve_snapname(offset_str, diri->ino()); | |
8347 | ||
8348 | bufferlist dirbl; | |
8349 | encode_empty_dirstat(dirbl); | |
8350 | ||
8351 | max_bytes -= dirbl.length() - sizeof(__u32) + sizeof(__u8) * 2; | |
8352 | ||
8353 | __u32 num = 0; | |
8354 | bufferlist dnbl; | |
8355 | map<snapid_t,SnapInfo*>::iterator p = infomap.upper_bound(last_snapid); | |
8356 | for (; p != infomap.end() && num < max_entries; ++p) { | |
8357 | dout(10) << p->first << " -> " << *p->second << dendl; | |
8358 | ||
8359 | // actual | |
8360 | string snap_name; | |
8361 | if (p->second->ino == diri->ino()) | |
8362 | snap_name = p->second->name; | |
8363 | else | |
8364 | snap_name = p->second->get_long_name(); | |
8365 | ||
8366 | unsigned start_len = dnbl.length(); | |
8367 | if (int(start_len + snap_name.length() + sizeof(__u32) + sizeof(LeaseStat)) > max_bytes) | |
8368 | break; | |
8369 | ||
8370 | ::encode(snap_name, dnbl); | |
8371 | encode_infinite_lease(dnbl); | |
8372 | ||
8373 | int r = diri->encode_inodestat(dnbl, mdr->session, realm, p->first, max_bytes - (int)dnbl.length()); | |
8374 | if (r < 0) { | |
8375 | bufferlist keep; | |
8376 | keep.substr_of(dnbl, 0, start_len); | |
8377 | dnbl.swap(keep); | |
8378 | break; | |
8379 | } | |
8380 | ++num; | |
8381 | } | |
8382 | ||
8383 | ::encode(num, dirbl); | |
8384 | __u16 flags = 0; | |
8385 | if (p == infomap.end()) { | |
8386 | flags = CEPH_READDIR_FRAG_END; | |
8387 | if (last_snapid == 0) | |
8388 | flags |= CEPH_READDIR_FRAG_COMPLETE; | |
8389 | } | |
8390 | ::encode(flags, dirbl); | |
8391 | dirbl.claim_append(dnbl); | |
8392 | ||
8393 | mdr->reply_extra_bl = dirbl; | |
8394 | mdr->tracei = diri; | |
8395 | respond_to_request(mdr, 0); | |
8396 | } | |
8397 | ||
8398 | ||
8399 | // MKSNAP | |
8400 | ||
8401 | struct C_MDS_mksnap_finish : public ServerLogContext { | |
8402 | CInode *diri; | |
8403 | SnapInfo info; | |
8404 | C_MDS_mksnap_finish(Server *s, MDRequestRef& r, CInode *di, SnapInfo &i) : | |
8405 | ServerLogContext(s, r), diri(di), info(i) {} | |
8406 | void finish(int r) override { | |
8407 | server->_mksnap_finish(mdr, diri, info); | |
8408 | } | |
8409 | }; | |
8410 | ||
8411 | /* This function takes responsibility for the passed mdr*/ | |
8412 | void Server::handle_client_mksnap(MDRequestRef& mdr) | |
8413 | { | |
8414 | if (!mds->mdsmap->allows_snaps()) { | |
8415 | // you can't make snapshots until you set an option right now | |
8416 | respond_to_request(mdr, -EPERM); | |
8417 | return; | |
8418 | } | |
8419 | ||
8420 | MClientRequest *req = mdr->client_request; | |
8421 | CInode *diri = mdcache->get_inode(req->get_filepath().get_ino()); | |
8422 | if (!diri || diri->state_test(CInode::STATE_PURGING)) { | |
8423 | respond_to_request(mdr, -ESTALE); | |
8424 | return; | |
8425 | } | |
8426 | ||
8427 | if (!diri->is_auth()) { // fw to auth? | |
8428 | mdcache->request_forward(mdr, diri->authority().first); | |
8429 | return; | |
8430 | } | |
8431 | ||
8432 | // dir only | |
8433 | if (!diri->is_dir()) { | |
8434 | respond_to_request(mdr, -ENOTDIR); | |
8435 | return; | |
8436 | } | |
8437 | if (diri->is_system() && !diri->is_root()) { | |
8438 | // no snaps in system dirs (root is ok) | |
8439 | respond_to_request(mdr, -EPERM); | |
8440 | return; | |
8441 | } | |
8442 | ||
8443 | const string &snapname = req->get_filepath().last_dentry(); | |
8444 | ||
8445 | if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid || mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) { | |
8446 | dout(20) << "mksnap " << snapname << " on " << *diri << " denied to uid " << mdr->client_request->get_caller_uid() << dendl; | |
8447 | respond_to_request(mdr, -EPERM); | |
8448 | return; | |
8449 | } | |
8450 | ||
8451 | dout(10) << "mksnap " << snapname << " on " << *diri << dendl; | |
8452 | ||
8453 | // lock snap | |
8454 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
8455 | ||
8456 | mds->locker->include_snap_rdlocks(rdlocks, diri); | |
8457 | rdlocks.erase(&diri->snaplock); | |
8458 | xlocks.insert(&diri->snaplock); | |
8459 | ||
8460 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
8461 | return; | |
8462 | ||
8463 | if (!check_access(mdr, diri, MAY_WRITE)) | |
8464 | return; | |
8465 | ||
8466 | // make sure name is unique | |
8467 | if (diri->snaprealm && | |
8468 | diri->snaprealm->exists(snapname)) { | |
8469 | respond_to_request(mdr, -EEXIST); | |
8470 | return; | |
8471 | } | |
8472 | if (snapname.length() == 0 || | |
8473 | snapname[0] == '_') { | |
8474 | respond_to_request(mdr, -EINVAL); | |
8475 | return; | |
8476 | } | |
8477 | ||
8478 | // allocate a snapid | |
8479 | if (!mdr->more()->stid) { | |
8480 | // prepare an stid | |
8481 | mds->snapclient->prepare_create(diri->ino(), snapname, | |
8482 | mdr->get_mds_stamp(), | |
8483 | &mdr->more()->stid, &mdr->more()->snapidbl, | |
8484 | new C_MDS_RetryRequest(mdcache, mdr)); | |
8485 | return; | |
8486 | } | |
8487 | ||
8488 | version_t stid = mdr->more()->stid; | |
8489 | snapid_t snapid; | |
8490 | bufferlist::iterator p = mdr->more()->snapidbl.begin(); | |
8491 | ::decode(snapid, p); | |
8492 | dout(10) << " stid " << stid << " snapid " << snapid << dendl; | |
8493 | ||
8494 | // journal | |
8495 | SnapInfo info; | |
8496 | info.ino = diri->ino(); | |
8497 | info.snapid = snapid; | |
8498 | info.name = snapname; | |
8499 | info.stamp = mdr->get_op_stamp(); | |
8500 | ||
8501 | inode_t *pi = diri->project_inode(); | |
8502 | pi->ctime = info.stamp; | |
8503 | pi->version = diri->pre_dirty(); | |
8504 | ||
8505 | // project the snaprealm | |
8506 | sr_t *newsnap = diri->project_snaprealm(snapid); | |
8507 | newsnap->snaps[snapid] = info; | |
8508 | newsnap->seq = snapid; | |
8509 | newsnap->last_created = snapid; | |
8510 | ||
8511 | // journal the inode changes | |
8512 | mdr->ls = mdlog->get_current_segment(); | |
8513 | EUpdate *le = new EUpdate(mdlog, "mksnap"); | |
8514 | mdlog->start_entry(le); | |
8515 | ||
8516 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
8517 | le->metablob.add_table_transaction(TABLE_SNAP, stid); | |
8518 | mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false); | |
8519 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri); | |
8520 | ||
8521 | // journal the snaprealm changes | |
8522 | submit_mdlog_entry(le, new C_MDS_mksnap_finish(this, mdr, diri, info), | |
8523 | mdr, __func__); | |
8524 | mdlog->flush(); | |
8525 | } | |
8526 | ||
8527 | void Server::_mksnap_finish(MDRequestRef& mdr, CInode *diri, SnapInfo &info) | |
8528 | { | |
8529 | dout(10) << "_mksnap_finish " << *mdr << " " << info << dendl; | |
8530 | ||
8531 | int op = (diri->snaprealm? CEPH_SNAP_OP_CREATE : CEPH_SNAP_OP_SPLIT); | |
8532 | ||
8533 | diri->pop_and_dirty_projected_inode(mdr->ls); | |
8534 | mdr->apply(); | |
8535 | ||
8536 | mds->snapclient->commit(mdr->more()->stid, mdr->ls); | |
8537 | ||
8538 | // create snap | |
8539 | dout(10) << "snaprealm now " << *diri->snaprealm << dendl; | |
8540 | ||
8541 | mdcache->do_realm_invalidate_and_update_notify(diri, op); | |
8542 | ||
8543 | // yay | |
8544 | mdr->in[0] = diri; | |
8545 | mdr->snapid = info.snapid; | |
8546 | mdr->tracei = diri; | |
8547 | respond_to_request(mdr, 0); | |
8548 | } | |
8549 | ||
8550 | ||
8551 | // RMSNAP | |
8552 | ||
8553 | struct C_MDS_rmsnap_finish : public ServerLogContext { | |
8554 | CInode *diri; | |
8555 | snapid_t snapid; | |
8556 | C_MDS_rmsnap_finish(Server *s, MDRequestRef& r, CInode *di, snapid_t sn) : | |
8557 | ServerLogContext(s, r), diri(di), snapid(sn) {} | |
8558 | void finish(int r) override { | |
8559 | server->_rmsnap_finish(mdr, diri, snapid); | |
8560 | } | |
8561 | }; | |
8562 | ||
8563 | /* This function takes responsibility for the passed mdr*/ | |
8564 | void Server::handle_client_rmsnap(MDRequestRef& mdr) | |
8565 | { | |
8566 | MClientRequest *req = mdr->client_request; | |
8567 | ||
8568 | CInode *diri = mdcache->get_inode(req->get_filepath().get_ino()); | |
8569 | if (!diri || diri->state_test(CInode::STATE_PURGING)) { | |
8570 | respond_to_request(mdr, -ESTALE); | |
8571 | return; | |
8572 | } | |
8573 | if (!diri->is_auth()) { // fw to auth? | |
8574 | mdcache->request_forward(mdr, diri->authority().first); | |
8575 | return; | |
8576 | } | |
8577 | if (!diri->is_dir()) { | |
8578 | respond_to_request(mdr, -ENOTDIR); | |
8579 | return; | |
8580 | } | |
8581 | ||
8582 | const string &snapname = req->get_filepath().last_dentry(); | |
8583 | ||
8584 | if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid || mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) { | |
8585 | dout(20) << "rmsnap " << snapname << " on " << *diri << " denied to uid " << mdr->client_request->get_caller_uid() << dendl; | |
8586 | respond_to_request(mdr, -EPERM); | |
8587 | return; | |
8588 | } | |
8589 | ||
8590 | dout(10) << "rmsnap " << snapname << " on " << *diri << dendl; | |
8591 | ||
8592 | // does snap exist? | |
8593 | if (snapname.length() == 0 || snapname[0] == '_') { | |
8594 | respond_to_request(mdr, -EINVAL); // can't prune a parent snap, currently. | |
8595 | return; | |
8596 | } | |
8597 | if (!diri->snaprealm || !diri->snaprealm->exists(snapname)) { | |
8598 | respond_to_request(mdr, -ENOENT); | |
8599 | return; | |
8600 | } | |
8601 | snapid_t snapid = diri->snaprealm->resolve_snapname(snapname, diri->ino()); | |
8602 | dout(10) << " snapname " << snapname << " is " << snapid << dendl; | |
8603 | ||
8604 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
8605 | mds->locker->include_snap_rdlocks(rdlocks, diri); | |
8606 | rdlocks.erase(&diri->snaplock); | |
8607 | xlocks.insert(&diri->snaplock); | |
8608 | ||
8609 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
8610 | return; | |
8611 | ||
8612 | if (!check_access(mdr, diri, MAY_WRITE)) | |
8613 | return; | |
8614 | ||
8615 | // prepare | |
8616 | if (!mdr->more()->stid) { | |
8617 | mds->snapclient->prepare_destroy(diri->ino(), snapid, | |
8618 | &mdr->more()->stid, &mdr->more()->snapidbl, | |
8619 | new C_MDS_RetryRequest(mdcache, mdr)); | |
8620 | return; | |
8621 | } | |
8622 | version_t stid = mdr->more()->stid; | |
8623 | bufferlist::iterator p = mdr->more()->snapidbl.begin(); | |
8624 | snapid_t seq; | |
8625 | ::decode(seq, p); | |
8626 | dout(10) << " stid is " << stid << ", seq is " << seq << dendl; | |
8627 | ||
8628 | // journal | |
8629 | inode_t *pi = diri->project_inode(); | |
8630 | pi->version = diri->pre_dirty(); | |
8631 | pi->ctime = mdr->get_op_stamp(); | |
8632 | ||
8633 | mdr->ls = mdlog->get_current_segment(); | |
8634 | EUpdate *le = new EUpdate(mdlog, "rmsnap"); | |
8635 | mdlog->start_entry(le); | |
8636 | ||
8637 | // project the snaprealm | |
8638 | sr_t *newnode = diri->project_snaprealm(); | |
8639 | newnode->snaps.erase(snapid); | |
8640 | newnode->seq = seq; | |
8641 | newnode->last_destroyed = seq; | |
8642 | ||
8643 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
8644 | le->metablob.add_table_transaction(TABLE_SNAP, stid); | |
8645 | mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false); | |
8646 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri); | |
8647 | ||
8648 | submit_mdlog_entry(le, new C_MDS_rmsnap_finish(this, mdr, diri, snapid), | |
8649 | mdr, __func__); | |
8650 | mdlog->flush(); | |
8651 | } | |
8652 | ||
8653 | void Server::_rmsnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid) | |
8654 | { | |
8655 | dout(10) << "_rmsnap_finish " << *mdr << " " << snapid << dendl; | |
8656 | snapid_t stid = mdr->more()->stid; | |
8657 | bufferlist::iterator p = mdr->more()->snapidbl.begin(); | |
8658 | snapid_t seq; | |
8659 | ::decode(seq, p); | |
8660 | ||
8661 | diri->pop_and_dirty_projected_inode(mdr->ls); | |
8662 | mdr->apply(); | |
8663 | ||
8664 | mds->snapclient->commit(stid, mdr->ls); | |
8665 | ||
8666 | dout(10) << "snaprealm now " << *diri->snaprealm << dendl; | |
8667 | ||
8668 | mdcache->do_realm_invalidate_and_update_notify(diri, CEPH_SNAP_OP_DESTROY); | |
8669 | ||
8670 | // yay | |
8671 | mdr->in[0] = diri; | |
8672 | respond_to_request(mdr, 0); | |
8673 | ||
8674 | // purge snapshot data | |
8675 | if (diri->snaprealm->have_past_parents_open()) | |
8676 | diri->purge_stale_snap_data(diri->snaprealm->get_snaps()); | |
8677 | } | |
8678 | ||
8679 | struct C_MDS_renamesnap_finish : public ServerLogContext { | |
8680 | CInode *diri; | |
8681 | snapid_t snapid; | |
8682 | C_MDS_renamesnap_finish(Server *s, MDRequestRef& r, CInode *di, snapid_t sn) : | |
8683 | ServerLogContext(s, r), diri(di), snapid(sn) {} | |
8684 | void finish(int r) override { | |
8685 | server->_renamesnap_finish(mdr, diri, snapid); | |
8686 | } | |
8687 | }; | |
8688 | ||
8689 | /* This function takes responsibility for the passed mdr*/ | |
8690 | void Server::handle_client_renamesnap(MDRequestRef& mdr) | |
8691 | { | |
8692 | MClientRequest *req = mdr->client_request; | |
8693 | if (req->get_filepath().get_ino() != req->get_filepath2().get_ino()) { | |
8694 | respond_to_request(mdr, -EINVAL); | |
8695 | return; | |
8696 | } | |
8697 | ||
8698 | CInode *diri = mdcache->get_inode(req->get_filepath().get_ino()); | |
8699 | if (!diri || diri->state_test(CInode::STATE_PURGING)) { | |
8700 | respond_to_request(mdr, -ESTALE); | |
8701 | return; | |
8702 | } | |
8703 | ||
8704 | if (!diri->is_auth()) { // fw to auth? | |
8705 | mdcache->request_forward(mdr, diri->authority().first); | |
8706 | return; | |
8707 | } | |
8708 | ||
8709 | if (!diri->is_dir()) { // dir only | |
8710 | respond_to_request(mdr, -ENOTDIR); | |
8711 | return; | |
8712 | } | |
8713 | ||
8714 | if (mdr->client_request->get_caller_uid() < g_conf->mds_snap_min_uid || | |
8715 | mdr->client_request->get_caller_uid() > g_conf->mds_snap_max_uid) { | |
8716 | respond_to_request(mdr, -EPERM); | |
8717 | return; | |
8718 | } | |
8719 | ||
8720 | const string &dstname = req->get_filepath().last_dentry(); | |
8721 | const string &srcname = req->get_filepath2().last_dentry(); | |
8722 | dout(10) << "renamesnap " << srcname << "->" << dstname << " on " << *diri << dendl; | |
8723 | ||
8724 | if (srcname.length() == 0 || srcname[0] == '_') { | |
8725 | respond_to_request(mdr, -EINVAL); // can't rename a parent snap. | |
8726 | return; | |
8727 | } | |
8728 | if (!diri->snaprealm || !diri->snaprealm->exists(srcname)) { | |
8729 | respond_to_request(mdr, -ENOENT); | |
8730 | return; | |
8731 | } | |
8732 | if (dstname.length() == 0 || dstname[0] == '_') { | |
8733 | respond_to_request(mdr, -EINVAL); | |
8734 | return; | |
8735 | } | |
8736 | if (diri->snaprealm->exists(dstname)) { | |
8737 | respond_to_request(mdr, -EEXIST); | |
8738 | return; | |
8739 | } | |
8740 | ||
8741 | snapid_t snapid = diri->snaprealm->resolve_snapname(srcname, diri->ino()); | |
8742 | dout(10) << " snapname " << srcname << " is " << snapid << dendl; | |
8743 | ||
8744 | // lock snap | |
8745 | set<SimpleLock*> rdlocks, wrlocks, xlocks; | |
8746 | ||
8747 | mds->locker->include_snap_rdlocks(rdlocks, diri); | |
8748 | rdlocks.erase(&diri->snaplock); | |
8749 | xlocks.insert(&diri->snaplock); | |
8750 | ||
8751 | if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks)) | |
8752 | return; | |
8753 | ||
8754 | if (!check_access(mdr, diri, MAY_WRITE)) | |
8755 | return; | |
8756 | ||
8757 | // prepare | |
8758 | if (!mdr->more()->stid) { | |
8759 | mds->snapclient->prepare_update(diri->ino(), snapid, dstname, utime_t(), | |
8760 | &mdr->more()->stid, &mdr->more()->snapidbl, | |
8761 | new C_MDS_RetryRequest(mdcache, mdr)); | |
8762 | return; | |
8763 | } | |
8764 | ||
8765 | version_t stid = mdr->more()->stid; | |
8766 | bufferlist::iterator p = mdr->more()->snapidbl.begin(); | |
8767 | snapid_t seq; | |
8768 | ::decode(seq, p); | |
8769 | dout(10) << " stid is " << stid << ", seq is " << seq << dendl; | |
8770 | ||
8771 | // journal | |
8772 | inode_t *pi = diri->project_inode(); | |
8773 | pi->ctime = mdr->get_op_stamp(); | |
8774 | pi->version = diri->pre_dirty(); | |
8775 | ||
8776 | // project the snaprealm | |
8777 | sr_t *newsnap = diri->project_snaprealm(); | |
8778 | assert(newsnap->snaps.count(snapid)); | |
8779 | newsnap->snaps[snapid].name = dstname; | |
8780 | ||
8781 | // journal the inode changes | |
8782 | mdr->ls = mdlog->get_current_segment(); | |
8783 | EUpdate *le = new EUpdate(mdlog, "renamesnap"); | |
8784 | mdlog->start_entry(le); | |
8785 | ||
8786 | le->metablob.add_client_req(req->get_reqid(), req->get_oldest_client_tid()); | |
8787 | le->metablob.add_table_transaction(TABLE_SNAP, stid); | |
8788 | mdcache->predirty_journal_parents(mdr, &le->metablob, diri, 0, PREDIRTY_PRIMARY, false); | |
8789 | mdcache->journal_dirty_inode(mdr.get(), &le->metablob, diri); | |
8790 | ||
8791 | // journal the snaprealm changes | |
8792 | submit_mdlog_entry(le, new C_MDS_renamesnap_finish(this, mdr, diri, snapid), | |
8793 | mdr, __func__); | |
8794 | mdlog->flush(); | |
8795 | } | |
8796 | ||
8797 | void Server::_renamesnap_finish(MDRequestRef& mdr, CInode *diri, snapid_t snapid) | |
8798 | { | |
8799 | dout(10) << "_renamesnap_finish " << *mdr << " " << snapid << dendl; | |
8800 | ||
8801 | diri->pop_and_dirty_projected_inode(mdr->ls); | |
8802 | mdr->apply(); | |
8803 | ||
8804 | mds->snapclient->commit(mdr->more()->stid, mdr->ls); | |
8805 | ||
8806 | dout(10) << "snaprealm now " << *diri->snaprealm << dendl; | |
8807 | ||
8808 | mdcache->do_realm_invalidate_and_update_notify(diri, CEPH_SNAP_OP_UPDATE, true); | |
8809 | ||
8810 | // yay | |
8811 | mdr->in[0] = diri; | |
8812 | mdr->tracei = diri; | |
8813 | mdr->snapid = snapid; | |
8814 | respond_to_request(mdr, 0); | |
8815 | } | |
8816 | ||
8817 | /** | |
8818 | * Return true if server is in state RECONNECT and this | |
8819 | * client has not yet reconnected. | |
8820 | */ | |
8821 | bool Server::waiting_for_reconnect(client_t c) const | |
8822 | { | |
8823 | return client_reconnect_gather.count(c) > 0; | |
8824 | } | |
8825 | ||
8826 | void Server::dump_reconnect_status(Formatter *f) const | |
8827 | { | |
8828 | f->open_object_section("reconnect_status"); | |
8829 | f->dump_stream("client_reconnect_gather") << client_reconnect_gather; | |
8830 | f->close_section(); | |
8831 | } |