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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
15 | ||
16 | #include "FSMap.h" | |
17 | ||
18 | #include <sstream> | |
19 | using std::stringstream; | |
20 | ||
21 | ||
22 | void Filesystem::dump(Formatter *f) const | |
23 | { | |
24 | f->open_object_section("mdsmap"); | |
25 | mds_map.dump(f); | |
26 | f->close_section(); | |
27 | f->dump_int("id", fscid); | |
28 | } | |
29 | ||
30 | void FSMap::dump(Formatter *f) const | |
31 | { | |
32 | f->dump_int("epoch", epoch); | |
33 | ||
34 | f->open_object_section("compat"); | |
35 | compat.dump(f); | |
36 | f->close_section(); | |
37 | ||
38 | f->open_object_section("feature_flags"); | |
39 | f->dump_bool("enable_multiple", enable_multiple); | |
40 | f->dump_bool("ever_enabled_multiple", ever_enabled_multiple); | |
41 | f->close_section(); | |
42 | ||
43 | f->open_array_section("standbys"); | |
44 | for (const auto &i : standby_daemons) { | |
45 | f->open_object_section("info"); | |
46 | i.second.dump(f); | |
47 | f->dump_int("epoch", standby_epochs.at(i.first)); | |
48 | f->close_section(); | |
49 | } | |
50 | f->close_section(); | |
51 | ||
52 | f->open_array_section("filesystems"); | |
53 | for (const auto &fs : filesystems) { | |
54 | f->open_object_section("filesystem"); | |
55 | fs.second->dump(f); | |
56 | f->close_section(); | |
57 | } | |
58 | f->close_section(); | |
59 | } | |
60 | ||
61 | void FSMap::generate_test_instances(list<FSMap*>& ls) | |
62 | { | |
63 | FSMap *m = new FSMap(); | |
64 | ||
65 | std::list<MDSMap*> mds_map_instances; | |
66 | MDSMap::generate_test_instances(mds_map_instances); | |
67 | ||
68 | int k = 20; | |
69 | for (auto i : mds_map_instances) { | |
70 | auto fs = std::make_shared<Filesystem>(); | |
71 | fs->fscid = k++; | |
72 | fs->mds_map = *i; | |
73 | delete i; | |
74 | m->filesystems[fs->fscid] = fs; | |
75 | } | |
76 | mds_map_instances.clear(); | |
77 | ||
78 | ls.push_back(m); | |
79 | } | |
80 | ||
81 | void FSMap::print(ostream& out) const | |
82 | { | |
83 | out << "e" << epoch << std::endl; | |
84 | out << "enable_multiple, ever_enabled_multiple: " << enable_multiple << "," | |
85 | << ever_enabled_multiple << std::endl; | |
86 | out << "compat: " << compat << std::endl; | |
87 | out << "legacy client fscid: " << legacy_client_fscid << std::endl; | |
88 | out << " " << std::endl; | |
89 | ||
90 | if (filesystems.empty()) { | |
91 | out << "No filesystems configured" << std::endl; | |
92 | return; | |
93 | } | |
94 | ||
95 | for (const auto &fs : filesystems) { | |
96 | fs.second->print(out); | |
97 | out << " " << std::endl << " " << std::endl; // Space out a bit | |
98 | } | |
99 | ||
100 | if (!standby_daemons.empty()) { | |
101 | out << "Standby daemons:" << std::endl << " " << std::endl; | |
102 | } | |
103 | ||
104 | for (const auto &p : standby_daemons) { | |
105 | p.second.print_summary(out); | |
106 | out << std::endl; | |
107 | } | |
108 | } | |
109 | ||
110 | ||
111 | ||
112 | void FSMap::print_summary(Formatter *f, ostream *out) const | |
113 | { | |
114 | map<mds_role_t,string> by_rank; | |
115 | map<string,int> by_state; | |
116 | ||
117 | if (f) { | |
118 | f->dump_unsigned("epoch", get_epoch()); | |
119 | for (auto i : filesystems) { | |
120 | auto fs = i.second; | |
121 | f->dump_unsigned("id", fs->fscid); | |
122 | f->dump_unsigned("up", fs->mds_map.up.size()); | |
123 | f->dump_unsigned("in", fs->mds_map.in.size()); | |
124 | f->dump_unsigned("max", fs->mds_map.max_mds); | |
125 | } | |
126 | } else { | |
7c673cae FG |
127 | if (filesystems.size() == 1) { |
128 | auto fs = filesystems.begin()->second; | |
31f18b77 | 129 | *out << fs->mds_map.up.size() << "/" << fs->mds_map.in.size() << "/" |
7c673cae FG |
130 | << fs->mds_map.max_mds << " up"; |
131 | } else { | |
132 | for (auto i : filesystems) { | |
133 | auto fs = i.second; | |
31f18b77 FG |
134 | *out << fs->mds_map.fs_name << "-" << fs->mds_map.up.size() << "/" |
135 | << fs->mds_map.in.size() << "/" << fs->mds_map.max_mds << " up "; | |
7c673cae FG |
136 | } |
137 | } | |
138 | } | |
139 | ||
140 | if (f) { | |
141 | f->open_array_section("by_rank"); | |
142 | } | |
143 | ||
144 | const auto all_info = get_mds_info(); | |
145 | for (const auto &p : all_info) { | |
146 | const auto &info = p.second; | |
147 | string s = ceph_mds_state_name(info.state); | |
148 | if (info.laggy()) { | |
149 | s += "(laggy or crashed)"; | |
150 | } | |
151 | ||
152 | const fs_cluster_id_t fscid = mds_roles.at(info.global_id); | |
153 | ||
154 | if (info.rank != MDS_RANK_NONE && | |
155 | info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
156 | if (f) { | |
157 | f->open_object_section("mds"); | |
158 | f->dump_unsigned("filesystem_id", fscid); | |
159 | f->dump_unsigned("rank", info.rank); | |
160 | f->dump_string("name", info.name); | |
161 | f->dump_string("status", s); | |
162 | f->close_section(); | |
163 | } else { | |
164 | by_rank[mds_role_t(fscid, info.rank)] = info.name + "=" + s; | |
165 | } | |
166 | } else { | |
167 | by_state[s]++; | |
168 | } | |
169 | } | |
170 | ||
171 | if (f) { | |
172 | f->close_section(); | |
173 | } else { | |
174 | if (!by_rank.empty()) { | |
175 | if (filesystems.size() > 1) { | |
176 | // Disambiguate filesystems | |
177 | std::map<std::string, std::string> pretty; | |
178 | for (auto i : by_rank) { | |
179 | const auto &fs_name = filesystems.at(i.first.fscid)->mds_map.fs_name; | |
180 | std::ostringstream o; | |
181 | o << "[" << fs_name << ":" << i.first.rank << "]"; | |
182 | pretty[o.str()] = i.second; | |
183 | } | |
184 | *out << " " << pretty; | |
185 | } else { | |
186 | // Omit FSCID in output when only one filesystem exists | |
187 | std::map<mds_rank_t, std::string> shortened; | |
188 | for (auto i : by_rank) { | |
189 | shortened[i.first.rank] = i.second; | |
190 | } | |
191 | *out << " " << shortened; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | for (map<string,int>::reverse_iterator p = by_state.rbegin(); p != by_state.rend(); ++p) { | |
197 | if (f) { | |
198 | f->dump_unsigned(p->first.c_str(), p->second); | |
199 | } else { | |
200 | *out << ", " << p->second << " " << p->first; | |
201 | } | |
202 | } | |
203 | ||
204 | size_t failed = 0; | |
205 | size_t damaged = 0; | |
206 | for (auto i : filesystems) { | |
207 | auto fs = i.second; | |
208 | failed += fs->mds_map.failed.size(); | |
209 | damaged += fs->mds_map.damaged.size(); | |
210 | } | |
211 | ||
212 | if (failed > 0) { | |
213 | if (f) { | |
214 | f->dump_unsigned("failed", failed); | |
215 | } else { | |
216 | *out << ", " << failed << " failed"; | |
217 | } | |
218 | } | |
219 | ||
220 | if (damaged > 0) { | |
221 | if (f) { | |
222 | f->dump_unsigned("damaged", damaged); | |
223 | } else { | |
224 | *out << ", " << damaged << " damaged"; | |
225 | } | |
226 | } | |
227 | //if (stopped.size()) | |
228 | //out << ", " << stopped.size() << " stopped"; | |
229 | } | |
230 | ||
231 | ||
232 | void FSMap::create_filesystem(const std::string &name, | |
233 | int64_t metadata_pool, int64_t data_pool, | |
234 | uint64_t features) | |
235 | { | |
236 | auto fs = std::make_shared<Filesystem>(); | |
237 | fs->mds_map.fs_name = name; | |
238 | fs->mds_map.max_mds = 1; | |
31f18b77 | 239 | fs->mds_map.data_pools.push_back(data_pool); |
7c673cae FG |
240 | fs->mds_map.metadata_pool = metadata_pool; |
241 | fs->mds_map.cas_pool = -1; | |
242 | fs->mds_map.max_file_size = g_conf->mds_max_file_size; | |
243 | fs->mds_map.compat = compat; | |
244 | fs->mds_map.created = ceph_clock_now(); | |
245 | fs->mds_map.modified = ceph_clock_now(); | |
246 | fs->mds_map.session_timeout = g_conf->mds_session_timeout; | |
247 | fs->mds_map.session_autoclose = g_conf->mds_session_autoclose; | |
248 | fs->mds_map.enabled = true; | |
249 | if (features & CEPH_FEATURE_SERVER_JEWEL) { | |
250 | fs->fscid = next_filesystem_id++; | |
251 | // ANONYMOUS is only for upgrades from legacy mdsmaps, we should | |
252 | // have initialized next_filesystem_id such that it's never used here. | |
253 | assert(fs->fscid != FS_CLUSTER_ID_ANONYMOUS); | |
254 | } else { | |
255 | // Use anon fscid because this will get thrown away when encoding | |
256 | // as legacy MDSMap for legacy mons. | |
257 | assert(filesystems.empty()); | |
258 | fs->fscid = FS_CLUSTER_ID_ANONYMOUS; | |
259 | } | |
260 | filesystems[fs->fscid] = fs; | |
261 | ||
262 | // Created first filesystem? Set it as the one | |
263 | // for legacy clients to use | |
264 | if (filesystems.size() == 1) { | |
265 | legacy_client_fscid = fs->fscid; | |
266 | } | |
267 | } | |
268 | ||
269 | void FSMap::reset_filesystem(fs_cluster_id_t fscid) | |
270 | { | |
271 | auto fs = get_filesystem(fscid); | |
272 | auto new_fs = std::make_shared<Filesystem>(); | |
273 | ||
274 | // Populate rank 0 as existing (so don't go into CREATING) | |
275 | // but failed (so that next available MDS is assigned the rank) | |
276 | new_fs->mds_map.in.insert(mds_rank_t(0)); | |
277 | new_fs->mds_map.failed.insert(mds_rank_t(0)); | |
278 | ||
279 | // Carry forward what makes sense | |
280 | new_fs->fscid = fs->fscid; | |
281 | new_fs->mds_map.inline_data_enabled = fs->mds_map.inline_data_enabled; | |
282 | new_fs->mds_map.max_mds = 1; | |
283 | new_fs->mds_map.data_pools = fs->mds_map.data_pools; | |
284 | new_fs->mds_map.metadata_pool = fs->mds_map.metadata_pool; | |
285 | new_fs->mds_map.cas_pool = fs->mds_map.cas_pool; | |
286 | new_fs->mds_map.fs_name = fs->mds_map.fs_name; | |
287 | new_fs->mds_map.max_file_size = g_conf->mds_max_file_size; | |
288 | new_fs->mds_map.compat = compat; | |
289 | new_fs->mds_map.created = ceph_clock_now(); | |
290 | new_fs->mds_map.modified = ceph_clock_now(); | |
291 | new_fs->mds_map.session_timeout = g_conf->mds_session_timeout; | |
292 | new_fs->mds_map.session_autoclose = g_conf->mds_session_autoclose; | |
293 | new_fs->mds_map.standby_count_wanted = fs->mds_map.standby_count_wanted; | |
294 | new_fs->mds_map.enabled = true; | |
295 | ||
296 | // Persist the new FSMap | |
297 | filesystems[new_fs->fscid] = new_fs; | |
298 | } | |
299 | ||
300 | void FSMap::get_health(list<pair<health_status_t,string> >& summary, | |
301 | list<pair<health_status_t,string> > *detail) const | |
302 | { | |
303 | mds_rank_t standby_count_wanted = 0; | |
304 | for (const auto &i : filesystems) { | |
305 | const auto &fs = i.second; | |
306 | ||
307 | // TODO: move get_health up into here so that we can qualify | |
308 | // all the messages with what filesystem they're talking about | |
309 | fs->mds_map.get_health(summary, detail); | |
310 | ||
311 | standby_count_wanted = std::max(standby_count_wanted, fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size())); | |
312 | } | |
313 | ||
314 | if (standby_count_wanted) { | |
315 | std::ostringstream oss; | |
316 | oss << "insufficient standby daemons available: have " << standby_daemons.size() << "; want " << standby_count_wanted << " more"; | |
317 | summary.push_back(make_pair(HEALTH_WARN, oss.str())); | |
318 | } | |
319 | } | |
320 | ||
321 | bool FSMap::check_health(void) | |
322 | { | |
323 | bool changed = false; | |
324 | for (auto &i : filesystems) { | |
325 | changed |= i.second->mds_map.check_health((mds_rank_t)standby_daemons.size()); | |
326 | } | |
327 | return changed; | |
328 | } | |
329 | ||
330 | void FSMap::encode(bufferlist& bl, uint64_t features) const | |
331 | { | |
332 | if (features & CEPH_FEATURE_SERVER_JEWEL) { | |
333 | ENCODE_START(7, 6, bl); | |
334 | ::encode(epoch, bl); | |
335 | ::encode(next_filesystem_id, bl); | |
336 | ::encode(legacy_client_fscid, bl); | |
337 | ::encode(compat, bl); | |
338 | ::encode(enable_multiple, bl); | |
339 | std::vector<Filesystem> fs_list; | |
340 | for (auto i : filesystems) { | |
341 | fs_list.push_back(*(i.second)); | |
342 | } | |
343 | ::encode(fs_list, bl, features); | |
344 | ::encode(mds_roles, bl); | |
345 | ::encode(standby_daemons, bl, features); | |
346 | ::encode(standby_epochs, bl); | |
347 | ::encode(ever_enabled_multiple, bl); | |
348 | ENCODE_FINISH(bl); | |
349 | } else { | |
350 | if (filesystems.empty()) { | |
351 | MDSMap disabled_map; | |
352 | disabled_map.epoch = epoch; | |
353 | disabled_map.encode(bl, features); | |
354 | } else { | |
355 | // MDSMonitor should never have created multiple filesystems | |
356 | // until the quorum features indicated Jewel | |
357 | assert(filesystems.size() == 1); | |
358 | auto fs = filesystems.begin()->second; | |
359 | ||
360 | // Take the MDSMap for the enabled filesystem, and populated its | |
361 | // mds_info with the standbys to get a pre-jewel-style mon MDSMap. | |
362 | MDSMap full_mdsmap = fs->mds_map; | |
363 | full_mdsmap.epoch = epoch; | |
364 | for (const auto &p : standby_daemons) { | |
365 | full_mdsmap.mds_info[p.first] = p.second; | |
366 | } | |
367 | ||
368 | // Old MDSMaps don't set rank on standby replay daemons | |
369 | for (auto &i : full_mdsmap.mds_info) { | |
370 | auto &info = i.second; | |
371 | if (info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
372 | info.rank = MDS_RANK_NONE; | |
373 | } | |
374 | } | |
375 | ||
376 | full_mdsmap.encode(bl, features); | |
377 | } | |
378 | } | |
379 | } | |
380 | ||
381 | void FSMap::decode(bufferlist::iterator& p) | |
382 | { | |
383 | // Because the mon used to store an MDSMap where we now | |
384 | // store an FSMap, FSMap knows how to decode the legacy | |
385 | // MDSMap format (it never needs to encode it though). | |
386 | MDSMap legacy_mds_map; | |
387 | ||
388 | // The highest MDSMap encoding version before we changed the | |
389 | // MDSMonitor to store an FSMap instead of an MDSMap was | |
390 | // 5, so anything older than 6 is decoded as an MDSMap, | |
391 | // and anything newer is decoded as an FSMap. | |
392 | DECODE_START_LEGACY_COMPAT_LEN_16(7, 4, 4, p); | |
393 | if (struct_v < 6) { | |
394 | // Decoding an MDSMap (upgrade) | |
395 | ::decode(epoch, p); | |
396 | ::decode(legacy_mds_map.flags, p); | |
397 | ::decode(legacy_mds_map.last_failure, p); | |
398 | ::decode(legacy_mds_map.root, p); | |
399 | ::decode(legacy_mds_map.session_timeout, p); | |
400 | ::decode(legacy_mds_map.session_autoclose, p); | |
401 | ::decode(legacy_mds_map.max_file_size, p); | |
402 | ::decode(legacy_mds_map.max_mds, p); | |
403 | ::decode(legacy_mds_map.mds_info, p); | |
404 | if (struct_v < 3) { | |
405 | __u32 n; | |
406 | ::decode(n, p); | |
407 | while (n--) { | |
408 | __u32 m; | |
409 | ::decode(m, p); | |
31f18b77 | 410 | legacy_mds_map.data_pools.push_back(m); |
7c673cae FG |
411 | } |
412 | __s32 s; | |
413 | ::decode(s, p); | |
414 | legacy_mds_map.cas_pool = s; | |
415 | } else { | |
416 | ::decode(legacy_mds_map.data_pools, p); | |
417 | ::decode(legacy_mds_map.cas_pool, p); | |
418 | } | |
419 | ||
420 | // kclient ignores everything from here | |
421 | __u16 ev = 1; | |
422 | if (struct_v >= 2) | |
423 | ::decode(ev, p); | |
424 | if (ev >= 3) | |
425 | ::decode(legacy_mds_map.compat, p); | |
426 | else | |
427 | legacy_mds_map.compat = get_mdsmap_compat_set_base(); | |
428 | if (ev < 5) { | |
429 | __u32 n; | |
430 | ::decode(n, p); | |
431 | legacy_mds_map.metadata_pool = n; | |
432 | } else { | |
433 | ::decode(legacy_mds_map.metadata_pool, p); | |
434 | } | |
435 | ::decode(legacy_mds_map.created, p); | |
436 | ::decode(legacy_mds_map.modified, p); | |
437 | ::decode(legacy_mds_map.tableserver, p); | |
438 | ::decode(legacy_mds_map.in, p); | |
439 | std::map<mds_rank_t,int32_t> inc; // Legacy field, parse and drop | |
440 | ::decode(inc, p); | |
441 | ::decode(legacy_mds_map.up, p); | |
442 | ::decode(legacy_mds_map.failed, p); | |
443 | ::decode(legacy_mds_map.stopped, p); | |
444 | if (ev >= 4) | |
445 | ::decode(legacy_mds_map.last_failure_osd_epoch, p); | |
446 | if (ev >= 6) { | |
447 | if (ev < 10) { | |
448 | // previously this was a bool about snaps, not a flag map | |
449 | bool flag; | |
450 | ::decode(flag, p); | |
451 | legacy_mds_map.ever_allowed_features = flag ? | |
452 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
453 | ::decode(flag, p); | |
454 | legacy_mds_map.explicitly_allowed_features = flag ? | |
455 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
456 | if (legacy_mds_map.max_mds > 1) { | |
457 | legacy_mds_map.set_multimds_allowed(); | |
458 | } | |
459 | } else { | |
460 | ::decode(legacy_mds_map.ever_allowed_features, p); | |
461 | ::decode(legacy_mds_map.explicitly_allowed_features, p); | |
462 | } | |
463 | } else { | |
464 | legacy_mds_map.ever_allowed_features = CEPH_MDSMAP_ALLOW_CLASSICS; | |
465 | legacy_mds_map.explicitly_allowed_features = 0; | |
466 | if (legacy_mds_map.max_mds > 1) { | |
467 | legacy_mds_map.set_multimds_allowed(); | |
468 | } | |
469 | } | |
470 | if (ev >= 7) | |
471 | ::decode(legacy_mds_map.inline_data_enabled, p); | |
472 | ||
473 | if (ev >= 8) { | |
474 | assert(struct_v >= 5); | |
475 | ::decode(legacy_mds_map.enabled, p); | |
476 | ::decode(legacy_mds_map.fs_name, p); | |
477 | } else { | |
478 | legacy_mds_map.fs_name = "default"; | |
479 | if (epoch > 1) { | |
480 | // If an MDS has ever been started, epoch will be greater than 1, | |
481 | // assume filesystem is enabled. | |
482 | legacy_mds_map.enabled = true; | |
483 | } else { | |
484 | // Upgrading from a cluster that never used an MDS, switch off | |
485 | // filesystem until it's explicitly enabled. | |
486 | legacy_mds_map.enabled = false; | |
487 | } | |
488 | } | |
489 | ||
490 | if (ev >= 9) { | |
491 | ::decode(legacy_mds_map.damaged, p); | |
492 | } | |
493 | ||
494 | // We're upgrading, populate filesystems from the legacy fields | |
495 | filesystems.clear(); | |
496 | standby_daemons.clear(); | |
497 | standby_epochs.clear(); | |
498 | mds_roles.clear(); | |
499 | compat = legacy_mds_map.compat; | |
500 | enable_multiple = false; | |
501 | ||
502 | // Synthesise a Filesystem from legacy_mds_map, if enabled | |
503 | if (legacy_mds_map.enabled) { | |
504 | // Construct a Filesystem from the legacy MDSMap | |
505 | auto migrate_fs = std::make_shared<Filesystem>(); | |
506 | migrate_fs->fscid = FS_CLUSTER_ID_ANONYMOUS; | |
507 | migrate_fs->mds_map = legacy_mds_map; | |
508 | migrate_fs->mds_map.epoch = epoch; | |
509 | filesystems[migrate_fs->fscid] = migrate_fs; | |
510 | ||
511 | // List of GIDs that had invalid states | |
512 | std::set<mds_gid_t> drop_gids; | |
513 | ||
514 | // Construct mds_roles, standby_daemons, and remove | |
515 | // standbys from the MDSMap in the Filesystem. | |
516 | for (auto &p : migrate_fs->mds_map.mds_info) { | |
517 | if (p.second.state == MDSMap::STATE_STANDBY_REPLAY) { | |
518 | // In legacy MDSMap, standby replay daemons don't have | |
519 | // rank set, but since FSMap they do. | |
520 | p.second.rank = p.second.standby_for_rank; | |
521 | } | |
522 | if (p.second.rank == MDS_RANK_NONE) { | |
523 | if (p.second.state != MDSMap::STATE_STANDBY) { | |
524 | // Old MDSMaps can have down:dne here, which | |
525 | // is invalid in an FSMap (#17837) | |
526 | drop_gids.insert(p.first); | |
527 | } else { | |
528 | insert(p.second); // into standby_daemons | |
529 | } | |
530 | } else { | |
531 | mds_roles[p.first] = migrate_fs->fscid; | |
532 | } | |
533 | } | |
534 | for (const auto &p : standby_daemons) { | |
535 | // Erase from this Filesystem's MDSMap, because it has | |
536 | // been copied into FSMap::Standby_daemons above | |
537 | migrate_fs->mds_map.mds_info.erase(p.first); | |
538 | } | |
539 | for (const auto &gid : drop_gids) { | |
540 | // Throw away all info for this MDS because it was identified | |
541 | // as having invalid state above. | |
542 | migrate_fs->mds_map.mds_info.erase(gid); | |
543 | } | |
544 | ||
545 | legacy_client_fscid = migrate_fs->fscid; | |
546 | } else { | |
547 | legacy_client_fscid = FS_CLUSTER_ID_NONE; | |
548 | } | |
549 | } else { | |
550 | ::decode(epoch, p); | |
551 | ::decode(next_filesystem_id, p); | |
552 | ::decode(legacy_client_fscid, p); | |
553 | ::decode(compat, p); | |
554 | ::decode(enable_multiple, p); | |
555 | std::vector<Filesystem> fs_list; | |
556 | ::decode(fs_list, p); | |
557 | filesystems.clear(); | |
558 | for (std::vector<Filesystem>::const_iterator fs = fs_list.begin(); fs != fs_list.end(); ++fs) { | |
559 | filesystems[fs->fscid] = std::make_shared<Filesystem>(*fs); | |
560 | } | |
561 | ||
562 | ::decode(mds_roles, p); | |
563 | ::decode(standby_daemons, p); | |
564 | ::decode(standby_epochs, p); | |
565 | if (struct_v >= 7) { | |
566 | ::decode(ever_enabled_multiple, p); | |
567 | } | |
568 | } | |
569 | ||
570 | DECODE_FINISH(p); | |
571 | } | |
572 | ||
573 | ||
574 | void Filesystem::encode(bufferlist& bl, uint64_t features) const | |
575 | { | |
576 | ENCODE_START(1, 1, bl); | |
577 | ::encode(fscid, bl); | |
578 | bufferlist mdsmap_bl; | |
579 | mds_map.encode(mdsmap_bl, features); | |
580 | ::encode(mdsmap_bl, bl); | |
581 | ENCODE_FINISH(bl); | |
582 | } | |
583 | ||
584 | void Filesystem::decode(bufferlist::iterator& p) | |
585 | { | |
586 | DECODE_START(1, p); | |
587 | ::decode(fscid, p); | |
588 | bufferlist mdsmap_bl; | |
589 | ::decode(mdsmap_bl, p); | |
590 | bufferlist::iterator mdsmap_bl_iter = mdsmap_bl.begin(); | |
591 | mds_map.decode(mdsmap_bl_iter); | |
592 | DECODE_FINISH(p); | |
593 | } | |
594 | ||
595 | int FSMap::parse_filesystem( | |
596 | std::string const &ns_str, | |
597 | std::shared_ptr<const Filesystem> *result | |
598 | ) const | |
599 | { | |
600 | std::string ns_err; | |
601 | fs_cluster_id_t fscid = strict_strtol(ns_str.c_str(), 10, &ns_err); | |
602 | if (!ns_err.empty() || filesystems.count(fscid) == 0) { | |
603 | for (auto &fs : filesystems) { | |
604 | if (fs.second->mds_map.fs_name == ns_str) { | |
605 | *result = std::const_pointer_cast<const Filesystem>(fs.second); | |
606 | return 0; | |
607 | } | |
608 | } | |
609 | return -ENOENT; | |
610 | } else { | |
611 | *result = get_filesystem(fscid); | |
612 | return 0; | |
613 | } | |
614 | } | |
615 | ||
616 | void Filesystem::print(std::ostream &out) const | |
617 | { | |
618 | out << "Filesystem '" << mds_map.fs_name | |
619 | << "' (" << fscid << ")" << std::endl; | |
620 | mds_map.print(out); | |
621 | } | |
622 | ||
623 | mds_gid_t FSMap::find_standby_for(mds_role_t role, const std::string& name) const | |
624 | { | |
625 | mds_gid_t result = MDS_GID_NONE; | |
626 | ||
627 | // First see if we have a STANDBY_REPLAY | |
628 | auto fs = get_filesystem(role.fscid); | |
629 | for (const auto &i : fs->mds_map.mds_info) { | |
630 | const auto &info = i.second; | |
631 | if (info.rank == role.rank && info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
632 | return info.global_id; | |
633 | } | |
634 | } | |
635 | ||
636 | // See if there are any STANDBY daemons available | |
637 | for (const auto &i : standby_daemons) { | |
638 | const auto &gid = i.first; | |
639 | const auto &info = i.second; | |
640 | assert(info.state == MDSMap::STATE_STANDBY); | |
641 | assert(info.rank == MDS_RANK_NONE); | |
642 | ||
643 | if (info.laggy()) { | |
644 | continue; | |
645 | } | |
646 | ||
647 | // The mds_info_t may or may not tell us exactly which filesystem | |
648 | // the standby_for_rank refers to: lookup via legacy_client_fscid | |
649 | mds_role_t target_role = { | |
650 | info.standby_for_fscid == FS_CLUSTER_ID_NONE ? | |
651 | legacy_client_fscid : info.standby_for_fscid, | |
652 | info.standby_for_rank}; | |
653 | ||
654 | if ((target_role.rank == role.rank && target_role.fscid == role.fscid) | |
655 | || (name.length() && info.standby_for_name == name)) { | |
656 | // It's a named standby for *me*, use it. | |
657 | return gid; | |
658 | } else if ( | |
659 | info.standby_for_rank < 0 && info.standby_for_name.length() == 0 && | |
660 | (info.standby_for_fscid == FS_CLUSTER_ID_NONE || | |
661 | info.standby_for_fscid == role.fscid)) { | |
662 | // It's not a named standby for anyone, use it if we don't find | |
663 | // a named standby for me later, unless it targets another FSCID. | |
664 | result = gid; | |
665 | } | |
666 | } | |
667 | ||
668 | return result; | |
669 | } | |
670 | ||
31f18b77 FG |
671 | mds_gid_t FSMap::find_unused_for(mds_role_t role, |
672 | bool force_standby_active) const { | |
7c673cae FG |
673 | for (const auto &i : standby_daemons) { |
674 | const auto &gid = i.first; | |
675 | const auto &info = i.second; | |
676 | assert(info.state == MDSMap::STATE_STANDBY); | |
677 | ||
678 | if (info.laggy() || info.rank >= 0) | |
679 | continue; | |
680 | ||
681 | if (info.standby_for_fscid != FS_CLUSTER_ID_NONE && | |
31f18b77 FG |
682 | info.standby_for_fscid != role.fscid) |
683 | continue; | |
684 | if (info.standby_for_rank != MDS_RANK_NONE && | |
685 | info.standby_for_rank != role.rank) | |
7c673cae FG |
686 | continue; |
687 | ||
688 | // To be considered 'unused' a daemon must either not | |
689 | // be selected for standby-replay or the force_standby_active | |
690 | // setting must be enabled to use replay daemons anyway. | |
691 | if (!info.standby_replay || force_standby_active) { | |
692 | return gid; | |
693 | } | |
694 | } | |
695 | return MDS_GID_NONE; | |
696 | } | |
697 | ||
698 | mds_gid_t FSMap::find_replacement_for(mds_role_t role, const std::string& name, | |
699 | bool force_standby_active) const { | |
700 | const mds_gid_t standby = find_standby_for(role, name); | |
701 | if (standby) | |
702 | return standby; | |
703 | else | |
31f18b77 | 704 | return find_unused_for(role, force_standby_active); |
7c673cae FG |
705 | } |
706 | ||
707 | void FSMap::sanity() const | |
708 | { | |
709 | if (legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
710 | assert(filesystems.count(legacy_client_fscid) == 1); | |
711 | } | |
712 | ||
713 | for (const auto &i : filesystems) { | |
714 | auto fs = i.second; | |
715 | assert(fs->mds_map.compat.compare(compat) == 0); | |
716 | assert(fs->fscid == i.first); | |
717 | for (const auto &j : fs->mds_map.mds_info) { | |
718 | assert(j.second.rank != MDS_RANK_NONE); | |
719 | assert(mds_roles.count(j.first) == 1); | |
720 | assert(standby_daemons.count(j.first) == 0); | |
721 | assert(standby_epochs.count(j.first) == 0); | |
722 | assert(mds_roles.at(j.first) == i.first); | |
723 | if (j.second.state != MDSMap::STATE_STANDBY_REPLAY) { | |
724 | assert(fs->mds_map.up.at(j.second.rank) == j.first); | |
725 | assert(fs->mds_map.failed.count(j.second.rank) == 0); | |
726 | assert(fs->mds_map.damaged.count(j.second.rank) == 0); | |
727 | } | |
728 | } | |
729 | ||
730 | for (const auto &j : fs->mds_map.up) { | |
731 | mds_rank_t rank = j.first; | |
732 | assert(fs->mds_map.in.count(rank) == 1); | |
733 | mds_gid_t gid = j.second; | |
734 | assert(fs->mds_map.mds_info.count(gid) == 1); | |
735 | } | |
736 | } | |
737 | ||
738 | for (const auto &i : standby_daemons) { | |
739 | assert(i.second.state == MDSMap::STATE_STANDBY); | |
740 | assert(i.second.rank == MDS_RANK_NONE); | |
741 | assert(i.second.global_id == i.first); | |
742 | assert(standby_epochs.count(i.first) == 1); | |
743 | assert(mds_roles.count(i.first) == 1); | |
744 | assert(mds_roles.at(i.first) == FS_CLUSTER_ID_NONE); | |
745 | } | |
746 | ||
747 | for (const auto &i : standby_epochs) { | |
748 | assert(standby_daemons.count(i.first) == 1); | |
749 | } | |
750 | ||
751 | for (const auto &i : mds_roles) { | |
752 | if (i.second == FS_CLUSTER_ID_NONE) { | |
753 | assert(standby_daemons.count(i.first) == 1); | |
754 | } else { | |
755 | assert(filesystems.count(i.second) == 1); | |
756 | assert(filesystems.at(i.second)->mds_map.mds_info.count(i.first) == 1); | |
757 | } | |
758 | } | |
759 | } | |
760 | ||
761 | void FSMap::promote( | |
762 | mds_gid_t standby_gid, | |
763 | const std::shared_ptr<Filesystem> &filesystem, | |
764 | mds_rank_t assigned_rank) | |
765 | { | |
766 | assert(gid_exists(standby_gid)); | |
767 | bool is_standby_replay = mds_roles.at(standby_gid) != FS_CLUSTER_ID_NONE; | |
768 | if (!is_standby_replay) { | |
769 | assert(standby_daemons.count(standby_gid)); | |
770 | assert(standby_daemons.at(standby_gid).state == MDSMap::STATE_STANDBY); | |
771 | } | |
772 | ||
773 | MDSMap &mds_map = filesystem->mds_map; | |
774 | ||
775 | // Insert daemon state to Filesystem | |
776 | if (!is_standby_replay) { | |
777 | mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
778 | } else { | |
779 | assert(mds_map.mds_info.count(standby_gid)); | |
780 | assert(mds_map.mds_info.at(standby_gid).state == MDSMap::STATE_STANDBY_REPLAY); | |
781 | assert(mds_map.mds_info.at(standby_gid).rank == assigned_rank); | |
782 | } | |
783 | MDSMap::mds_info_t &info = mds_map.mds_info[standby_gid]; | |
784 | ||
785 | if (mds_map.stopped.erase(assigned_rank)) { | |
786 | // The cluster is being expanded with a stopped rank | |
787 | info.state = MDSMap::STATE_STARTING; | |
788 | } else if (!mds_map.is_in(assigned_rank)) { | |
789 | // The cluster is being expanded with a new rank | |
790 | info.state = MDSMap::STATE_CREATING; | |
791 | } else { | |
792 | // An existing rank is being assigned to a replacement | |
793 | info.state = MDSMap::STATE_REPLAY; | |
794 | mds_map.failed.erase(assigned_rank); | |
795 | } | |
796 | info.rank = assigned_rank; | |
797 | info.inc = epoch; | |
798 | mds_roles[standby_gid] = filesystem->fscid; | |
799 | ||
800 | // Update the rank state in Filesystem | |
801 | mds_map.in.insert(assigned_rank); | |
802 | mds_map.up[assigned_rank] = standby_gid; | |
803 | ||
804 | // Remove from the list of standbys | |
805 | if (!is_standby_replay) { | |
806 | standby_daemons.erase(standby_gid); | |
807 | standby_epochs.erase(standby_gid); | |
808 | } | |
809 | ||
810 | // Indicate that Filesystem has been modified | |
811 | mds_map.epoch = epoch; | |
812 | } | |
813 | ||
814 | void FSMap::assign_standby_replay( | |
815 | const mds_gid_t standby_gid, | |
816 | const fs_cluster_id_t leader_ns, | |
817 | const mds_rank_t leader_rank) | |
818 | { | |
819 | assert(mds_roles.at(standby_gid) == FS_CLUSTER_ID_NONE); | |
820 | assert(gid_exists(standby_gid)); | |
821 | assert(!gid_has_rank(standby_gid)); | |
822 | assert(standby_daemons.count(standby_gid)); | |
823 | ||
824 | // Insert to the filesystem | |
825 | auto fs = filesystems.at(leader_ns); | |
826 | fs->mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
827 | fs->mds_map.mds_info[standby_gid].rank = leader_rank; | |
828 | fs->mds_map.mds_info[standby_gid].state = MDSMap::STATE_STANDBY_REPLAY; | |
829 | mds_roles[standby_gid] = leader_ns; | |
830 | ||
831 | // Remove from the list of standbys | |
832 | standby_daemons.erase(standby_gid); | |
833 | standby_epochs.erase(standby_gid); | |
834 | ||
835 | // Indicate that Filesystem has been modified | |
836 | fs->mds_map.epoch = epoch; | |
837 | } | |
838 | ||
839 | void FSMap::erase(mds_gid_t who, epoch_t blacklist_epoch) | |
840 | { | |
841 | if (mds_roles.at(who) == FS_CLUSTER_ID_NONE) { | |
842 | standby_daemons.erase(who); | |
843 | standby_epochs.erase(who); | |
844 | } else { | |
845 | auto &fs = filesystems.at(mds_roles.at(who)); | |
846 | const auto &info = fs->mds_map.mds_info.at(who); | |
847 | if (info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
848 | if (info.state == MDSMap::STATE_CREATING) { | |
849 | // If this gid didn't make it past CREATING, then forget | |
850 | // the rank ever existed so that next time it's handed out | |
851 | // to a gid it'll go back into CREATING. | |
852 | fs->mds_map.in.erase(info.rank); | |
853 | } else { | |
854 | // Put this rank into the failed list so that the next available | |
855 | // STANDBY will pick it up. | |
856 | fs->mds_map.failed.insert(info.rank); | |
857 | } | |
858 | assert(fs->mds_map.up.at(info.rank) == info.global_id); | |
859 | fs->mds_map.up.erase(info.rank); | |
860 | } | |
861 | fs->mds_map.mds_info.erase(who); | |
862 | fs->mds_map.last_failure_osd_epoch = blacklist_epoch; | |
863 | fs->mds_map.epoch = epoch; | |
864 | } | |
865 | ||
866 | mds_roles.erase(who); | |
867 | } | |
868 | ||
869 | void FSMap::damaged(mds_gid_t who, epoch_t blacklist_epoch) | |
870 | { | |
871 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
872 | auto fs = filesystems.at(mds_roles.at(who)); | |
873 | mds_rank_t rank = fs->mds_map.mds_info[who].rank; | |
874 | ||
875 | erase(who, blacklist_epoch); | |
876 | fs->mds_map.failed.erase(rank); | |
877 | fs->mds_map.damaged.insert(rank); | |
878 | ||
879 | assert(fs->mds_map.epoch == epoch); | |
880 | } | |
881 | ||
882 | /** | |
883 | * Update to indicate that the rank `rank` is to be removed | |
884 | * from the damaged list of the filesystem `fscid` | |
885 | */ | |
886 | bool FSMap::undamaged(const fs_cluster_id_t fscid, const mds_rank_t rank) | |
887 | { | |
888 | auto fs = filesystems.at(fscid); | |
889 | ||
890 | if (fs->mds_map.damaged.erase(rank)) { | |
891 | fs->mds_map.failed.insert(rank); | |
892 | fs->mds_map.epoch = epoch; | |
893 | return true; | |
894 | } else { | |
895 | return false; | |
896 | } | |
897 | } | |
898 | ||
899 | void FSMap::insert(const MDSMap::mds_info_t &new_info) | |
900 | { | |
901 | assert(new_info.state == MDSMap::STATE_STANDBY); | |
902 | assert(new_info.rank == MDS_RANK_NONE); | |
903 | mds_roles[new_info.global_id] = FS_CLUSTER_ID_NONE; | |
904 | standby_daemons[new_info.global_id] = new_info; | |
905 | standby_epochs[new_info.global_id] = epoch; | |
906 | } | |
907 | ||
908 | std::list<mds_gid_t> FSMap::stop(mds_gid_t who) | |
909 | { | |
910 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
911 | auto fs = filesystems.at(mds_roles.at(who)); | |
912 | const auto &info = fs->mds_map.mds_info.at(who); | |
913 | fs->mds_map.up.erase(info.rank); | |
914 | fs->mds_map.in.erase(info.rank); | |
915 | fs->mds_map.stopped.insert(info.rank); | |
916 | ||
917 | // Also drop any standby replays that were following this rank | |
918 | std::list<mds_gid_t> standbys; | |
919 | for (const auto &i : fs->mds_map.mds_info) { | |
920 | const auto &other_gid = i.first; | |
921 | const auto &other_info = i.second; | |
922 | if (other_info.rank == info.rank | |
923 | && other_info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
924 | standbys.push_back(other_gid); | |
925 | erase(other_gid, 0); | |
926 | } | |
927 | } | |
928 | ||
929 | fs->mds_map.mds_info.erase(who); | |
930 | mds_roles.erase(who); | |
931 | ||
932 | fs->mds_map.epoch = epoch; | |
933 | ||
934 | return standbys; | |
935 | } | |
936 | ||
937 | ||
938 | /** | |
939 | * Given one of the following forms: | |
940 | * <fs name>:<rank> | |
941 | * <fs id>:<rank> | |
942 | * <rank> | |
943 | * | |
944 | * Parse into a mds_role_t. The rank-only form is only valid | |
945 | * if legacy_client_ns is set. | |
946 | */ | |
947 | int FSMap::parse_role( | |
948 | const std::string &role_str, | |
949 | mds_role_t *role, | |
950 | std::ostream &ss) const | |
951 | { | |
952 | size_t colon_pos = role_str.find(":"); | |
953 | size_t rank_pos; | |
954 | std::shared_ptr<const Filesystem> fs; | |
955 | if (colon_pos == std::string::npos) { | |
956 | if (legacy_client_fscid == FS_CLUSTER_ID_NONE) { | |
957 | ss << "No filesystem selected"; | |
958 | return -ENOENT; | |
959 | } | |
960 | fs = get_filesystem(legacy_client_fscid); | |
961 | rank_pos = 0; | |
962 | } else { | |
963 | if (parse_filesystem(role_str.substr(0, colon_pos), &fs) < 0) { | |
964 | ss << "Invalid filesystem"; | |
965 | return -ENOENT; | |
966 | } | |
967 | rank_pos = colon_pos+1; | |
968 | } | |
969 | ||
970 | mds_rank_t rank; | |
971 | std::string err; | |
972 | std::string rank_str = role_str.substr(rank_pos); | |
973 | long rank_i = strict_strtol(rank_str.c_str(), 10, &err); | |
974 | if (rank_i < 0 || !err.empty()) { | |
975 | ss << "Invalid rank '" << rank_str << "'"; | |
976 | return -EINVAL; | |
977 | } else { | |
978 | rank = rank_i; | |
979 | } | |
980 | ||
981 | if (fs->mds_map.in.count(rank) == 0) { | |
982 | ss << "Rank '" << rank << "' not found"; | |
983 | return -ENOENT; | |
984 | } | |
985 | ||
986 | *role = {fs->fscid, rank}; | |
987 | ||
988 | return 0; | |
989 | } |