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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 | #include <boost/intrusive_ptr.hpp> | |
5 | #include "common/ceph_json.h" | |
6 | #include "common/errno.h" | |
7 | #include "rgw_metadata.h" | |
8 | #include "rgw_coroutine.h" | |
9 | #include "cls/version/cls_version_types.h" | |
10 | ||
11 | #include "rgw_rados.h" | |
12 | #include "rgw_tools.h" | |
13 | ||
14 | #include "rgw_cr_rados.h" | |
15 | #include "rgw_boost_asio_yield.h" | |
16 | ||
17 | #include "include/assert.h" | |
18 | ||
19 | #define dout_subsys ceph_subsys_rgw | |
20 | ||
21 | void LogStatusDump::dump(Formatter *f) const { | |
22 | string s; | |
23 | switch (status) { | |
24 | case MDLOG_STATUS_WRITE: | |
25 | s = "write"; | |
26 | break; | |
27 | case MDLOG_STATUS_SETATTRS: | |
28 | s = "set_attrs"; | |
29 | break; | |
30 | case MDLOG_STATUS_REMOVE: | |
31 | s = "remove"; | |
32 | break; | |
33 | case MDLOG_STATUS_COMPLETE: | |
34 | s = "complete"; | |
35 | break; | |
36 | case MDLOG_STATUS_ABORT: | |
37 | s = "abort"; | |
38 | break; | |
39 | default: | |
40 | s = "unknown"; | |
41 | break; | |
42 | } | |
43 | encode_json("status", s, f); | |
44 | } | |
45 | ||
46 | void RGWMetadataLogData::encode(bufferlist& bl) const { | |
47 | ENCODE_START(1, 1, bl); | |
48 | ::encode(read_version, bl); | |
49 | ::encode(write_version, bl); | |
50 | uint32_t s = (uint32_t)status; | |
51 | ::encode(s, bl); | |
52 | ENCODE_FINISH(bl); | |
53 | } | |
54 | ||
55 | void RGWMetadataLogData::decode(bufferlist::iterator& bl) { | |
56 | DECODE_START(1, bl); | |
57 | ::decode(read_version, bl); | |
58 | ::decode(write_version, bl); | |
59 | uint32_t s; | |
60 | ::decode(s, bl); | |
61 | status = (RGWMDLogStatus)s; | |
62 | DECODE_FINISH(bl); | |
63 | } | |
64 | ||
65 | void RGWMetadataLogData::dump(Formatter *f) const { | |
66 | encode_json("read_version", read_version, f); | |
67 | encode_json("write_version", write_version, f); | |
68 | encode_json("status", LogStatusDump(status), f); | |
69 | } | |
70 | ||
71 | void decode_json_obj(RGWMDLogStatus& status, JSONObj *obj) { | |
72 | string s; | |
73 | JSONDecoder::decode_json("status", s, obj); | |
74 | if (s == "complete") { | |
75 | status = MDLOG_STATUS_COMPLETE; | |
76 | } else if (s == "write") { | |
77 | status = MDLOG_STATUS_WRITE; | |
78 | } else if (s == "remove") { | |
79 | status = MDLOG_STATUS_REMOVE; | |
80 | } else if (s == "set_attrs") { | |
81 | status = MDLOG_STATUS_SETATTRS; | |
82 | } else if (s == "abort") { | |
83 | status = MDLOG_STATUS_ABORT; | |
84 | } else { | |
85 | status = MDLOG_STATUS_UNKNOWN; | |
86 | } | |
87 | } | |
88 | ||
89 | void RGWMetadataLogData::decode_json(JSONObj *obj) { | |
90 | JSONDecoder::decode_json("read_version", read_version, obj); | |
91 | JSONDecoder::decode_json("write_version", write_version, obj); | |
92 | JSONDecoder::decode_json("status", status, obj); | |
93 | } | |
94 | ||
95 | ||
96 | int RGWMetadataLog::add_entry(RGWMetadataHandler *handler, const string& section, const string& key, bufferlist& bl) { | |
97 | if (!store->need_to_log_metadata()) | |
98 | return 0; | |
99 | ||
100 | string oid; | |
101 | ||
102 | string hash_key; | |
103 | handler->get_hash_key(section, key, hash_key); | |
104 | ||
105 | int shard_id; | |
106 | store->shard_name(prefix, cct->_conf->rgw_md_log_max_shards, hash_key, oid, &shard_id); | |
107 | mark_modified(shard_id); | |
108 | real_time now = real_clock::now(); | |
109 | return store->time_log_add(oid, now, section, key, bl); | |
110 | } | |
111 | ||
112 | int RGWMetadataLog::store_entries_in_shard(list<cls_log_entry>& entries, int shard_id, librados::AioCompletion *completion) | |
113 | { | |
114 | string oid; | |
115 | ||
116 | mark_modified(shard_id); | |
117 | store->shard_name(prefix, shard_id, oid); | |
118 | return store->time_log_add(oid, entries, completion, false); | |
119 | } | |
120 | ||
121 | void RGWMetadataLog::init_list_entries(int shard_id, const real_time& from_time, const real_time& end_time, | |
122 | string& marker, void **handle) | |
123 | { | |
124 | LogListCtx *ctx = new LogListCtx(); | |
125 | ||
126 | ctx->cur_shard = shard_id; | |
127 | ctx->from_time = from_time; | |
128 | ctx->end_time = end_time; | |
129 | ctx->marker = marker; | |
130 | ||
131 | get_shard_oid(ctx->cur_shard, ctx->cur_oid); | |
132 | ||
133 | *handle = (void *)ctx; | |
134 | } | |
135 | ||
136 | void RGWMetadataLog::complete_list_entries(void *handle) { | |
137 | LogListCtx *ctx = static_cast<LogListCtx *>(handle); | |
138 | delete ctx; | |
139 | } | |
140 | ||
141 | int RGWMetadataLog::list_entries(void *handle, | |
142 | int max_entries, | |
143 | list<cls_log_entry>& entries, | |
144 | string *last_marker, | |
145 | bool *truncated) { | |
146 | LogListCtx *ctx = static_cast<LogListCtx *>(handle); | |
147 | ||
148 | if (!max_entries) { | |
149 | *truncated = false; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | int ret = store->time_log_list(ctx->cur_oid, ctx->from_time, ctx->end_time, | |
154 | max_entries, entries, ctx->marker, | |
155 | last_marker, truncated); | |
156 | if ((ret < 0) && (ret != -ENOENT)) | |
157 | return ret; | |
158 | ||
159 | if (ret == -ENOENT) | |
160 | *truncated = false; | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int RGWMetadataLog::get_info(int shard_id, RGWMetadataLogInfo *info) | |
166 | { | |
167 | string oid; | |
168 | get_shard_oid(shard_id, oid); | |
169 | ||
170 | cls_log_header header; | |
171 | ||
172 | int ret = store->time_log_info(oid, &header); | |
173 | if ((ret < 0) && (ret != -ENOENT)) | |
174 | return ret; | |
175 | ||
176 | info->marker = header.max_marker; | |
177 | info->last_update = header.max_time.to_real_time(); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static void _mdlog_info_completion(librados::completion_t cb, void *arg) | |
183 | { | |
184 | auto infoc = static_cast<RGWMetadataLogInfoCompletion *>(arg); | |
185 | infoc->finish(cb); | |
186 | infoc->put(); // drop the ref from get_info_async() | |
187 | } | |
188 | ||
189 | RGWMetadataLogInfoCompletion::RGWMetadataLogInfoCompletion(info_callback_t cb) | |
190 | : completion(librados::Rados::aio_create_completion((void *)this, nullptr, | |
191 | _mdlog_info_completion)), | |
192 | callback(cb) | |
193 | { | |
194 | } | |
195 | ||
196 | RGWMetadataLogInfoCompletion::~RGWMetadataLogInfoCompletion() | |
197 | { | |
198 | completion->release(); | |
199 | } | |
200 | ||
201 | int RGWMetadataLog::get_info_async(int shard_id, RGWMetadataLogInfoCompletion *completion) | |
202 | { | |
203 | string oid; | |
204 | get_shard_oid(shard_id, oid); | |
205 | ||
206 | completion->get(); // hold a ref until the completion fires | |
207 | ||
208 | return store->time_log_info_async(completion->get_io_ctx(), oid, | |
209 | &completion->get_header(), | |
210 | completion->get_completion()); | |
211 | } | |
212 | ||
213 | int RGWMetadataLog::trim(int shard_id, const real_time& from_time, const real_time& end_time, | |
214 | const string& start_marker, const string& end_marker) | |
215 | { | |
216 | string oid; | |
217 | get_shard_oid(shard_id, oid); | |
218 | ||
219 | int ret; | |
220 | ||
221 | ret = store->time_log_trim(oid, from_time, end_time, start_marker, end_marker); | |
222 | ||
223 | if (ret == -ENOENT) | |
224 | ret = 0; | |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
229 | int RGWMetadataLog::lock_exclusive(int shard_id, timespan duration, string& zone_id, string& owner_id) { | |
230 | string oid; | |
231 | get_shard_oid(shard_id, oid); | |
232 | ||
233 | return store->lock_exclusive(store->get_zone_params().log_pool, oid, duration, zone_id, owner_id); | |
234 | } | |
235 | ||
236 | int RGWMetadataLog::unlock(int shard_id, string& zone_id, string& owner_id) { | |
237 | string oid; | |
238 | get_shard_oid(shard_id, oid); | |
239 | ||
240 | return store->unlock(store->get_zone_params().log_pool, oid, zone_id, owner_id); | |
241 | } | |
242 | ||
243 | void RGWMetadataLog::mark_modified(int shard_id) | |
244 | { | |
245 | lock.get_read(); | |
246 | if (modified_shards.find(shard_id) != modified_shards.end()) { | |
247 | lock.unlock(); | |
248 | return; | |
249 | } | |
250 | lock.unlock(); | |
251 | ||
252 | RWLock::WLocker wl(lock); | |
253 | modified_shards.insert(shard_id); | |
254 | } | |
255 | ||
256 | void RGWMetadataLog::read_clear_modified(set<int> &modified) | |
257 | { | |
258 | RWLock::WLocker wl(lock); | |
259 | modified.swap(modified_shards); | |
260 | modified_shards.clear(); | |
261 | } | |
262 | ||
263 | obj_version& RGWMetadataObject::get_version() | |
264 | { | |
265 | return objv; | |
266 | } | |
267 | ||
268 | class RGWMetadataTopHandler : public RGWMetadataHandler { | |
269 | struct iter_data { | |
270 | list<string> sections; | |
271 | list<string>::iterator iter; | |
272 | }; | |
273 | ||
274 | public: | |
275 | RGWMetadataTopHandler() {} | |
276 | ||
277 | string get_type() override { return string(); } | |
278 | ||
279 | int get(RGWRados *store, string& entry, RGWMetadataObject **obj) override { return -ENOTSUP; } | |
280 | int put(RGWRados *store, string& entry, RGWObjVersionTracker& objv_tracker, | |
281 | real_time mtime, JSONObj *obj, sync_type_t sync_type) override { return -ENOTSUP; } | |
282 | ||
283 | virtual void get_pool_and_oid(RGWRados *store, const string& key, rgw_pool& pool, string& oid) override {} | |
284 | ||
285 | int remove(RGWRados *store, string& entry, RGWObjVersionTracker& objv_tracker) override { return -ENOTSUP; } | |
286 | ||
287 | int list_keys_init(RGWRados *store, void **phandle) override { | |
288 | iter_data *data = new iter_data; | |
289 | store->meta_mgr->get_sections(data->sections); | |
290 | data->iter = data->sections.begin(); | |
291 | ||
292 | *phandle = data; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | int list_keys_next(void *handle, int max, list<string>& keys, bool *truncated) override { | |
297 | iter_data *data = static_cast<iter_data *>(handle); | |
298 | for (int i = 0; i < max && data->iter != data->sections.end(); ++i, ++(data->iter)) { | |
299 | keys.push_back(*data->iter); | |
300 | } | |
301 | ||
302 | *truncated = (data->iter != data->sections.end()); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | void list_keys_complete(void *handle) override { | |
307 | iter_data *data = static_cast<iter_data *>(handle); | |
308 | ||
309 | delete data; | |
310 | } | |
311 | }; | |
312 | ||
313 | static RGWMetadataTopHandler md_top_handler; | |
314 | ||
315 | ||
316 | RGWMetadataManager::RGWMetadataManager(CephContext *_cct, RGWRados *_store) | |
317 | : cct(_cct), store(_store) | |
318 | { | |
319 | } | |
320 | ||
321 | RGWMetadataManager::~RGWMetadataManager() | |
322 | { | |
323 | map<string, RGWMetadataHandler *>::iterator iter; | |
324 | ||
325 | for (iter = handlers.begin(); iter != handlers.end(); ++iter) { | |
326 | delete iter->second; | |
327 | } | |
328 | ||
329 | handlers.clear(); | |
330 | } | |
331 | ||
332 | const std::string RGWMetadataLogHistory::oid = "meta.history"; | |
333 | ||
334 | namespace { | |
335 | ||
336 | int read_history(RGWRados *store, RGWMetadataLogHistory *state, | |
337 | RGWObjVersionTracker *objv_tracker) | |
338 | { | |
339 | RGWObjectCtx ctx{store}; | |
340 | auto& pool = store->get_zone_params().log_pool; | |
341 | const auto& oid = RGWMetadataLogHistory::oid; | |
342 | bufferlist bl; | |
343 | int ret = rgw_get_system_obj(store, ctx, pool, oid, bl, objv_tracker, nullptr); | |
344 | if (ret < 0) { | |
345 | return ret; | |
346 | } | |
347 | try { | |
348 | auto p = bl.begin(); | |
349 | state->decode(p); | |
350 | } catch (buffer::error& e) { | |
351 | ldout(store->ctx(), 1) << "failed to decode the mdlog history: " | |
352 | << e.what() << dendl; | |
353 | return -EIO; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | int write_history(RGWRados *store, const RGWMetadataLogHistory& state, | |
359 | RGWObjVersionTracker *objv_tracker, bool exclusive = false) | |
360 | { | |
361 | bufferlist bl; | |
362 | state.encode(bl); | |
363 | ||
364 | auto& pool = store->get_zone_params().log_pool; | |
365 | const auto& oid = RGWMetadataLogHistory::oid; | |
366 | return rgw_put_system_obj(store, pool, oid, bl.c_str(), bl.length(), | |
367 | exclusive, objv_tracker, real_time{}); | |
368 | } | |
369 | ||
370 | using Cursor = RGWPeriodHistory::Cursor; | |
371 | ||
372 | /// read the mdlog history and use it to initialize the given cursor | |
373 | class ReadHistoryCR : public RGWCoroutine { | |
374 | RGWRados *store; | |
375 | Cursor *cursor; | |
376 | RGWObjVersionTracker *objv_tracker; | |
377 | RGWMetadataLogHistory state; | |
378 | public: | |
379 | ReadHistoryCR(RGWRados *store, Cursor *cursor, | |
380 | RGWObjVersionTracker *objv_tracker) | |
381 | : RGWCoroutine(store->ctx()), store(store), cursor(cursor), | |
382 | objv_tracker(objv_tracker) | |
383 | {} | |
384 | ||
385 | int operate() { | |
386 | reenter(this) { | |
387 | yield { | |
388 | rgw_raw_obj obj{store->get_zone_params().log_pool, | |
389 | RGWMetadataLogHistory::oid}; | |
390 | constexpr bool empty_on_enoent = false; | |
391 | ||
392 | using ReadCR = RGWSimpleRadosReadCR<RGWMetadataLogHistory>; | |
393 | call(new ReadCR(store->get_async_rados(), store, obj, | |
394 | &state, empty_on_enoent, objv_tracker)); | |
395 | } | |
396 | if (retcode < 0) { | |
397 | ldout(cct, 1) << "failed to read mdlog history: " | |
398 | << cpp_strerror(retcode) << dendl; | |
399 | return set_cr_error(retcode); | |
400 | } | |
401 | *cursor = store->period_history->lookup(state.oldest_realm_epoch); | |
402 | if (!*cursor) { | |
403 | return set_cr_error(cursor->get_error()); | |
404 | } | |
405 | ||
406 | ldout(cct, 10) << "read mdlog history with oldest period id=" | |
407 | << state.oldest_period_id << " realm_epoch=" | |
408 | << state.oldest_realm_epoch << dendl; | |
409 | return set_cr_done(); | |
410 | } | |
411 | return 0; | |
412 | } | |
413 | }; | |
414 | ||
415 | /// write the given cursor to the mdlog history | |
416 | class WriteHistoryCR : public RGWCoroutine { | |
417 | RGWRados *store; | |
418 | Cursor cursor; | |
419 | RGWObjVersionTracker *objv; | |
420 | RGWMetadataLogHistory state; | |
421 | public: | |
422 | WriteHistoryCR(RGWRados *store, const Cursor& cursor, | |
423 | RGWObjVersionTracker *objv) | |
424 | : RGWCoroutine(store->ctx()), store(store), cursor(cursor), objv(objv) | |
425 | {} | |
426 | ||
427 | int operate() { | |
428 | reenter(this) { | |
429 | state.oldest_period_id = cursor.get_period().get_id(); | |
430 | state.oldest_realm_epoch = cursor.get_epoch(); | |
431 | ||
432 | yield { | |
433 | rgw_raw_obj obj{store->get_zone_params().log_pool, | |
434 | RGWMetadataLogHistory::oid}; | |
435 | ||
436 | using WriteCR = RGWSimpleRadosWriteCR<RGWMetadataLogHistory>; | |
437 | call(new WriteCR(store->get_async_rados(), store, obj, state, objv)); | |
438 | } | |
439 | if (retcode < 0) { | |
440 | ldout(cct, 1) << "failed to write mdlog history: " | |
441 | << cpp_strerror(retcode) << dendl; | |
442 | return set_cr_error(retcode); | |
443 | } | |
444 | ||
445 | ldout(cct, 10) << "wrote mdlog history with oldest period id=" | |
446 | << state.oldest_period_id << " realm_epoch=" | |
447 | << state.oldest_realm_epoch << dendl; | |
448 | return set_cr_done(); | |
449 | } | |
450 | return 0; | |
451 | } | |
452 | }; | |
453 | ||
454 | /// update the mdlog history to reflect trimmed logs | |
455 | class TrimHistoryCR : public RGWCoroutine { | |
456 | RGWRados *store; | |
457 | const Cursor cursor; //< cursor to trimmed period | |
458 | RGWObjVersionTracker *objv; //< to prevent racing updates | |
459 | Cursor next; //< target cursor for oldest log period | |
460 | Cursor existing; //< existing cursor read from disk | |
461 | ||
462 | public: | |
463 | TrimHistoryCR(RGWRados *store, Cursor cursor, RGWObjVersionTracker *objv) | |
464 | : RGWCoroutine(store->ctx()), | |
465 | store(store), cursor(cursor), objv(objv), next(cursor) | |
466 | { | |
467 | next.next(); // advance past cursor | |
468 | } | |
469 | ||
470 | int operate() { | |
471 | reenter(this) { | |
472 | // read an existing history, and write the new history if it's newer | |
473 | yield call(new ReadHistoryCR(store, &existing, objv)); | |
474 | if (retcode < 0) { | |
475 | return set_cr_error(retcode); | |
476 | } | |
477 | // reject older trims with ECANCELED | |
478 | if (cursor.get_epoch() < existing.get_epoch()) { | |
479 | ldout(cct, 4) << "found oldest log epoch=" << existing.get_epoch() | |
480 | << ", rejecting trim at epoch=" << cursor.get_epoch() << dendl; | |
481 | return set_cr_error(-ECANCELED); | |
482 | } | |
483 | // overwrite with updated history | |
484 | yield call(new WriteHistoryCR(store, next, objv)); | |
485 | if (retcode < 0) { | |
486 | return set_cr_error(retcode); | |
487 | } | |
488 | return set_cr_done(); | |
489 | } | |
490 | return 0; | |
491 | } | |
492 | }; | |
493 | ||
494 | // traverse all the way back to the beginning of the period history, and | |
495 | // return a cursor to the first period in a fully attached history | |
496 | Cursor find_oldest_period(RGWRados *store) | |
497 | { | |
498 | auto cct = store->ctx(); | |
499 | auto cursor = store->period_history->get_current(); | |
500 | ||
501 | while (cursor) { | |
502 | // advance to the period's predecessor | |
503 | if (!cursor.has_prev()) { | |
504 | auto& predecessor = cursor.get_period().get_predecessor(); | |
505 | if (predecessor.empty()) { | |
506 | // this is the first period, so our logs must start here | |
507 | ldout(cct, 10) << "find_oldest_period returning first " | |
508 | "period " << cursor.get_period().get_id() << dendl; | |
509 | return cursor; | |
510 | } | |
511 | // pull the predecessor and add it to our history | |
512 | RGWPeriod period; | |
513 | int r = store->period_puller->pull(predecessor, period); | |
514 | if (r < 0) { | |
515 | return Cursor{r}; | |
516 | } | |
517 | auto prev = store->period_history->insert(std::move(period)); | |
518 | if (!prev) { | |
519 | return prev; | |
520 | } | |
521 | ldout(cct, 20) << "find_oldest_period advancing to " | |
522 | "predecessor period " << predecessor << dendl; | |
523 | assert(cursor.has_prev()); | |
524 | } | |
525 | cursor.prev(); | |
526 | } | |
527 | ldout(cct, 10) << "find_oldest_period returning empty cursor" << dendl; | |
528 | return cursor; | |
529 | } | |
530 | ||
531 | } // anonymous namespace | |
532 | ||
533 | Cursor RGWMetadataManager::init_oldest_log_period() | |
534 | { | |
535 | // read the mdlog history | |
536 | RGWMetadataLogHistory state; | |
537 | RGWObjVersionTracker objv; | |
538 | int ret = read_history(store, &state, &objv); | |
539 | ||
540 | if (ret == -ENOENT) { | |
541 | // initialize the mdlog history and write it | |
542 | ldout(cct, 10) << "initializing mdlog history" << dendl; | |
543 | auto cursor = find_oldest_period(store); | |
544 | if (!cursor) { | |
545 | return cursor; | |
546 | } | |
547 | ||
548 | // write the initial history | |
549 | state.oldest_realm_epoch = cursor.get_epoch(); | |
550 | state.oldest_period_id = cursor.get_period().get_id(); | |
551 | ||
552 | constexpr bool exclusive = true; // don't overwrite | |
553 | int ret = write_history(store, state, &objv, exclusive); | |
554 | if (ret < 0 && ret != -EEXIST) { | |
555 | ldout(cct, 1) << "failed to write mdlog history: " | |
556 | << cpp_strerror(ret) << dendl; | |
557 | return Cursor{ret}; | |
558 | } | |
559 | return cursor; | |
560 | } else if (ret < 0) { | |
561 | ldout(cct, 1) << "failed to read mdlog history: " | |
562 | << cpp_strerror(ret) << dendl; | |
563 | return Cursor{ret}; | |
564 | } | |
565 | ||
566 | // if it's already in the history, return it | |
567 | auto cursor = store->period_history->lookup(state.oldest_realm_epoch); | |
568 | if (cursor) { | |
569 | return cursor; | |
570 | } | |
571 | // pull the oldest period by id | |
572 | RGWPeriod period; | |
573 | ret = store->period_puller->pull(state.oldest_period_id, period); | |
574 | if (ret < 0) { | |
575 | ldout(cct, 1) << "failed to read period id=" << state.oldest_period_id | |
576 | << " for mdlog history: " << cpp_strerror(ret) << dendl; | |
577 | return Cursor{ret}; | |
578 | } | |
579 | // verify its realm_epoch | |
580 | if (period.get_realm_epoch() != state.oldest_realm_epoch) { | |
581 | ldout(cct, 1) << "inconsistent mdlog history: read period id=" | |
582 | << period.get_id() << " with realm_epoch=" << period.get_realm_epoch() | |
583 | << ", expected realm_epoch=" << state.oldest_realm_epoch << dendl; | |
584 | return Cursor{-EINVAL}; | |
585 | } | |
586 | // attach the period to our history | |
587 | return store->period_history->attach(std::move(period)); | |
588 | } | |
589 | ||
590 | Cursor RGWMetadataManager::read_oldest_log_period() const | |
591 | { | |
592 | RGWMetadataLogHistory state; | |
593 | int ret = read_history(store, &state, nullptr); | |
594 | if (ret < 0) { | |
595 | ldout(store->ctx(), 1) << "failed to read mdlog history: " | |
596 | << cpp_strerror(ret) << dendl; | |
597 | return Cursor{ret}; | |
598 | } | |
599 | ||
600 | ldout(store->ctx(), 10) << "read mdlog history with oldest period id=" | |
601 | << state.oldest_period_id << " realm_epoch=" | |
602 | << state.oldest_realm_epoch << dendl; | |
603 | ||
604 | return store->period_history->lookup(state.oldest_realm_epoch); | |
605 | } | |
606 | ||
607 | RGWCoroutine* RGWMetadataManager::read_oldest_log_period_cr(Cursor *period, | |
608 | RGWObjVersionTracker *objv) const | |
609 | { | |
610 | return new ReadHistoryCR(store, period, objv); | |
611 | } | |
612 | ||
613 | RGWCoroutine* RGWMetadataManager::trim_log_period_cr(Cursor period, | |
614 | RGWObjVersionTracker *objv) const | |
615 | { | |
616 | return new TrimHistoryCR(store, period, objv); | |
617 | } | |
618 | ||
619 | int RGWMetadataManager::init(const std::string& current_period) | |
620 | { | |
621 | // open a log for the current period | |
622 | current_log = get_log(current_period); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | RGWMetadataLog* RGWMetadataManager::get_log(const std::string& period) | |
627 | { | |
628 | // construct the period's log in place if it doesn't exist | |
629 | auto insert = md_logs.emplace(std::piecewise_construct, | |
630 | std::forward_as_tuple(period), | |
631 | std::forward_as_tuple(cct, store, period)); | |
632 | return &insert.first->second; | |
633 | } | |
634 | ||
635 | int RGWMetadataManager::register_handler(RGWMetadataHandler *handler) | |
636 | { | |
637 | string type = handler->get_type(); | |
638 | ||
639 | if (handlers.find(type) != handlers.end()) | |
640 | return -EINVAL; | |
641 | ||
642 | handlers[type] = handler; | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | RGWMetadataHandler *RGWMetadataManager::get_handler(const string& type) | |
648 | { | |
649 | map<string, RGWMetadataHandler *>::iterator iter = handlers.find(type); | |
650 | if (iter == handlers.end()) | |
651 | return NULL; | |
652 | ||
653 | return iter->second; | |
654 | } | |
655 | ||
656 | void RGWMetadataManager::parse_metadata_key(const string& metadata_key, string& type, string& entry) | |
657 | { | |
658 | auto pos = metadata_key.find(':'); | |
659 | if (pos == string::npos) { | |
660 | type = metadata_key; | |
661 | } else { | |
662 | type = metadata_key.substr(0, pos); | |
663 | entry = metadata_key.substr(pos + 1); | |
664 | } | |
665 | } | |
666 | ||
667 | int RGWMetadataManager::find_handler(const string& metadata_key, RGWMetadataHandler **handler, string& entry) | |
668 | { | |
669 | string type; | |
670 | ||
671 | parse_metadata_key(metadata_key, type, entry); | |
672 | ||
673 | if (type.empty()) { | |
674 | *handler = &md_top_handler; | |
675 | return 0; | |
676 | } | |
677 | ||
678 | map<string, RGWMetadataHandler *>::iterator iter = handlers.find(type); | |
679 | if (iter == handlers.end()) | |
680 | return -ENOENT; | |
681 | ||
682 | *handler = iter->second; | |
683 | ||
684 | return 0; | |
685 | ||
686 | } | |
687 | ||
688 | int RGWMetadataManager::get(string& metadata_key, Formatter *f) | |
689 | { | |
690 | RGWMetadataHandler *handler; | |
691 | string entry; | |
692 | int ret = find_handler(metadata_key, &handler, entry); | |
693 | if (ret < 0) { | |
694 | return ret; | |
695 | } | |
696 | ||
697 | RGWMetadataObject *obj; | |
698 | ||
699 | ret = handler->get(store, entry, &obj); | |
700 | if (ret < 0) { | |
701 | return ret; | |
702 | } | |
703 | ||
704 | f->open_object_section("metadata_info"); | |
705 | encode_json("key", metadata_key, f); | |
706 | encode_json("ver", obj->get_version(), f); | |
707 | real_time mtime = obj->get_mtime(); | |
708 | if (!real_clock::is_zero(mtime)) { | |
709 | utime_t ut(mtime); | |
710 | encode_json("mtime", ut, f); | |
711 | } | |
712 | encode_json("data", *obj, f); | |
713 | f->close_section(); | |
714 | ||
715 | delete obj; | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | int RGWMetadataManager::put(string& metadata_key, bufferlist& bl, | |
721 | RGWMetadataHandler::sync_type_t sync_type, | |
722 | obj_version *existing_version) | |
723 | { | |
724 | RGWMetadataHandler *handler; | |
725 | string entry; | |
726 | ||
727 | int ret = find_handler(metadata_key, &handler, entry); | |
728 | if (ret < 0) | |
729 | return ret; | |
730 | ||
731 | JSONParser parser; | |
732 | if (!parser.parse(bl.c_str(), bl.length())) { | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
736 | RGWObjVersionTracker objv_tracker; | |
737 | ||
738 | obj_version *objv = &objv_tracker.write_version; | |
739 | ||
740 | utime_t mtime; | |
741 | ||
742 | try { | |
743 | JSONDecoder::decode_json("key", metadata_key, &parser); | |
744 | JSONDecoder::decode_json("ver", *objv, &parser); | |
745 | JSONDecoder::decode_json("mtime", mtime, &parser); | |
746 | } catch (JSONDecoder::err& e) { | |
747 | return -EINVAL; | |
748 | } | |
749 | ||
750 | JSONObj *jo = parser.find_obj("data"); | |
751 | if (!jo) { | |
752 | return -EINVAL; | |
753 | } | |
754 | ||
755 | ret = handler->put(store, entry, objv_tracker, mtime.to_real_time(), jo, sync_type); | |
756 | if (existing_version) { | |
757 | *existing_version = objv_tracker.read_version; | |
758 | } | |
759 | return ret; | |
760 | } | |
761 | ||
762 | int RGWMetadataManager::remove(string& metadata_key) | |
763 | { | |
764 | RGWMetadataHandler *handler; | |
765 | string entry; | |
766 | ||
767 | int ret = find_handler(metadata_key, &handler, entry); | |
768 | if (ret < 0) | |
769 | return ret; | |
770 | ||
771 | RGWMetadataObject *obj; | |
772 | ||
773 | ret = handler->get(store, entry, &obj); | |
774 | if (ret < 0) { | |
775 | return ret; | |
776 | } | |
777 | ||
778 | RGWObjVersionTracker objv_tracker; | |
779 | ||
780 | objv_tracker.read_version = obj->get_version(); | |
781 | ||
782 | delete obj; | |
783 | ||
784 | return handler->remove(store, entry, objv_tracker); | |
785 | } | |
786 | ||
787 | int RGWMetadataManager::lock_exclusive(string& metadata_key, timespan duration, string& owner_id) { | |
788 | RGWMetadataHandler *handler; | |
789 | string entry; | |
790 | string zone_id; | |
791 | ||
792 | int ret = find_handler(metadata_key, &handler, entry); | |
793 | if (ret < 0) | |
794 | return ret; | |
795 | ||
796 | rgw_pool pool; | |
797 | string oid; | |
798 | ||
799 | handler->get_pool_and_oid(store, entry, pool, oid); | |
800 | ||
801 | return store->lock_exclusive(pool, oid, duration, zone_id, owner_id); | |
802 | } | |
803 | ||
804 | int RGWMetadataManager::unlock(string& metadata_key, string& owner_id) { | |
805 | librados::IoCtx io_ctx; | |
806 | RGWMetadataHandler *handler; | |
807 | string entry; | |
808 | string zone_id; | |
809 | ||
810 | int ret = find_handler(metadata_key, &handler, entry); | |
811 | if (ret < 0) | |
812 | return ret; | |
813 | ||
814 | rgw_pool pool; | |
815 | string oid; | |
816 | ||
817 | handler->get_pool_and_oid(store, entry, pool, oid); | |
818 | ||
819 | return store->unlock(pool, oid, zone_id, owner_id); | |
820 | } | |
821 | ||
822 | struct list_keys_handle { | |
823 | void *handle; | |
824 | RGWMetadataHandler *handler; | |
825 | }; | |
826 | ||
827 | ||
828 | int RGWMetadataManager::list_keys_init(string& section, void **handle) | |
829 | { | |
830 | string entry; | |
831 | RGWMetadataHandler *handler; | |
832 | ||
833 | int ret; | |
834 | ||
835 | ret = find_handler(section, &handler, entry); | |
836 | if (ret < 0) { | |
837 | return -ENOENT; | |
838 | } | |
839 | ||
840 | list_keys_handle *h = new list_keys_handle; | |
841 | h->handler = handler; | |
842 | ret = handler->list_keys_init(store, &h->handle); | |
843 | if (ret < 0) { | |
844 | delete h; | |
845 | return ret; | |
846 | } | |
847 | ||
848 | *handle = (void *)h; | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | int RGWMetadataManager::list_keys_next(void *handle, int max, list<string>& keys, bool *truncated) | |
854 | { | |
855 | list_keys_handle *h = static_cast<list_keys_handle *>(handle); | |
856 | ||
857 | RGWMetadataHandler *handler = h->handler; | |
858 | ||
859 | return handler->list_keys_next(h->handle, max, keys, truncated); | |
860 | } | |
861 | ||
862 | ||
863 | void RGWMetadataManager::list_keys_complete(void *handle) | |
864 | { | |
865 | list_keys_handle *h = static_cast<list_keys_handle *>(handle); | |
866 | ||
867 | RGWMetadataHandler *handler = h->handler; | |
868 | ||
869 | handler->list_keys_complete(h->handle); | |
870 | delete h; | |
871 | } | |
872 | ||
873 | void RGWMetadataManager::dump_log_entry(cls_log_entry& entry, Formatter *f) | |
874 | { | |
875 | f->open_object_section("entry"); | |
876 | f->dump_string("id", entry.id); | |
877 | f->dump_string("section", entry.section); | |
878 | f->dump_string("name", entry.name); | |
879 | entry.timestamp.gmtime_nsec(f->dump_stream("timestamp")); | |
880 | ||
881 | try { | |
882 | RGWMetadataLogData log_data; | |
883 | bufferlist::iterator iter = entry.data.begin(); | |
884 | ::decode(log_data, iter); | |
885 | ||
886 | encode_json("data", log_data, f); | |
887 | } catch (buffer::error& err) { | |
888 | lderr(cct) << "failed to decode log entry: " << entry.section << ":" << entry.name<< " ts=" << entry.timestamp << dendl; | |
889 | } | |
890 | f->close_section(); | |
891 | } | |
892 | ||
893 | void RGWMetadataManager::get_sections(list<string>& sections) | |
894 | { | |
895 | for (map<string, RGWMetadataHandler *>::iterator iter = handlers.begin(); iter != handlers.end(); ++iter) { | |
896 | sections.push_back(iter->first); | |
897 | } | |
898 | } | |
899 | ||
900 | int RGWMetadataManager::pre_modify(RGWMetadataHandler *handler, string& section, const string& key, | |
901 | RGWMetadataLogData& log_data, RGWObjVersionTracker *objv_tracker, | |
902 | RGWMDLogStatus op_type) | |
903 | { | |
904 | section = handler->get_type(); | |
905 | ||
906 | /* if write version has not been set, and there's a read version, set it so that we can | |
907 | * log it | |
908 | */ | |
909 | if (objv_tracker) { | |
910 | if (objv_tracker->read_version.ver && !objv_tracker->write_version.ver) { | |
911 | objv_tracker->write_version = objv_tracker->read_version; | |
912 | objv_tracker->write_version.ver++; | |
913 | } | |
914 | log_data.read_version = objv_tracker->read_version; | |
915 | log_data.write_version = objv_tracker->write_version; | |
916 | } | |
917 | ||
918 | log_data.status = op_type; | |
919 | ||
920 | bufferlist logbl; | |
921 | ::encode(log_data, logbl); | |
922 | ||
923 | assert(current_log); // must have called init() | |
924 | int ret = current_log->add_entry(handler, section, key, logbl); | |
925 | if (ret < 0) | |
926 | return ret; | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | int RGWMetadataManager::post_modify(RGWMetadataHandler *handler, const string& section, const string& key, RGWMetadataLogData& log_data, | |
932 | RGWObjVersionTracker *objv_tracker, int ret) | |
933 | { | |
934 | if (ret >= 0) | |
935 | log_data.status = MDLOG_STATUS_COMPLETE; | |
936 | else | |
937 | log_data.status = MDLOG_STATUS_ABORT; | |
938 | ||
939 | bufferlist logbl; | |
940 | ::encode(log_data, logbl); | |
941 | ||
942 | assert(current_log); // must have called init() | |
943 | int r = current_log->add_entry(handler, section, key, logbl); | |
944 | if (ret < 0) | |
945 | return ret; | |
946 | ||
947 | if (r < 0) | |
948 | return r; | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | string RGWMetadataManager::heap_oid(RGWMetadataHandler *handler, const string& key, const obj_version& objv) | |
954 | { | |
955 | char buf[objv.tag.size() + 32]; | |
956 | snprintf(buf, sizeof(buf), "%s:%lld", objv.tag.c_str(), (long long)objv.ver); | |
957 | return string(".meta:") + handler->get_type() + ":" + key + ":" + buf; | |
958 | } | |
959 | ||
960 | int RGWMetadataManager::store_in_heap(RGWMetadataHandler *handler, const string& key, bufferlist& bl, | |
961 | RGWObjVersionTracker *objv_tracker, real_time mtime, | |
962 | map<string, bufferlist> *pattrs) | |
963 | { | |
964 | if (!objv_tracker) { | |
965 | return -EINVAL; | |
966 | } | |
967 | ||
968 | rgw_pool heap_pool(store->get_zone_params().metadata_heap); | |
969 | ||
970 | if (heap_pool.empty()) { | |
971 | return 0; | |
972 | } | |
973 | ||
974 | RGWObjVersionTracker otracker; | |
975 | otracker.write_version = objv_tracker->write_version; | |
976 | string oid = heap_oid(handler, key, objv_tracker->write_version); | |
977 | int ret = rgw_put_system_obj(store, heap_pool, oid, | |
978 | bl.c_str(), bl.length(), false, | |
979 | &otracker, mtime, pattrs); | |
980 | if (ret < 0) { | |
981 | ldout(store->ctx(), 0) << "ERROR: rgw_put_system_obj() oid=" << oid << ") returned ret=" << ret << dendl; | |
982 | return ret; | |
983 | } | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
988 | int RGWMetadataManager::remove_from_heap(RGWMetadataHandler *handler, const string& key, RGWObjVersionTracker *objv_tracker) | |
989 | { | |
990 | if (!objv_tracker) { | |
991 | return -EINVAL; | |
992 | } | |
993 | ||
994 | rgw_pool heap_pool(store->get_zone_params().metadata_heap); | |
995 | ||
996 | if (heap_pool.empty()) { | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | string oid = heap_oid(handler, key, objv_tracker->write_version); | |
1001 | rgw_raw_obj obj(heap_pool, oid); | |
1002 | int ret = store->delete_system_obj(obj); | |
1003 | if (ret < 0) { | |
1004 | ldout(store->ctx(), 0) << "ERROR: store->delete_system_obj()=" << oid << ") returned ret=" << ret << dendl; | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | int RGWMetadataManager::put_entry(RGWMetadataHandler *handler, const string& key, bufferlist& bl, bool exclusive, | |
1012 | RGWObjVersionTracker *objv_tracker, real_time mtime, map<string, bufferlist> *pattrs) | |
1013 | { | |
1014 | string section; | |
1015 | RGWMetadataLogData log_data; | |
1016 | int ret = pre_modify(handler, section, key, log_data, objv_tracker, MDLOG_STATUS_WRITE); | |
1017 | if (ret < 0) | |
1018 | return ret; | |
1019 | ||
1020 | string oid; | |
1021 | rgw_pool pool; | |
1022 | ||
1023 | handler->get_pool_and_oid(store, key, pool, oid); | |
1024 | ||
1025 | ret = store_in_heap(handler, key, bl, objv_tracker, mtime, pattrs); | |
1026 | if (ret < 0) { | |
1027 | ldout(store->ctx(), 0) << "ERROR: " << __func__ << ": store_in_heap() key=" << key << " returned ret=" << ret << dendl; | |
1028 | goto done; | |
1029 | } | |
1030 | ||
1031 | ret = rgw_put_system_obj(store, pool, oid, | |
1032 | bl.c_str(), bl.length(), exclusive, | |
1033 | objv_tracker, mtime, pattrs); | |
1034 | ||
1035 | if (ret < 0) { | |
1036 | int r = remove_from_heap(handler, key, objv_tracker); | |
1037 | if (r < 0) { | |
1038 | ldout(store->ctx(), 0) << "ERROR: " << __func__ << ": remove_from_heap() key=" << key << " returned ret=" << r << dendl; | |
1039 | } | |
1040 | } | |
1041 | done: | |
1042 | /* cascading ret into post_modify() */ | |
1043 | ||
1044 | ret = post_modify(handler, section, key, log_data, objv_tracker, ret); | |
1045 | if (ret < 0) | |
1046 | return ret; | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | int RGWMetadataManager::remove_entry(RGWMetadataHandler *handler, string& key, RGWObjVersionTracker *objv_tracker) | |
1052 | { | |
1053 | string section; | |
1054 | RGWMetadataLogData log_data; | |
1055 | int ret = pre_modify(handler, section, key, log_data, objv_tracker, MDLOG_STATUS_REMOVE); | |
1056 | if (ret < 0) | |
1057 | return ret; | |
1058 | ||
1059 | string oid; | |
1060 | rgw_pool pool; | |
1061 | ||
1062 | handler->get_pool_and_oid(store, key, pool, oid); | |
1063 | ||
1064 | rgw_raw_obj obj(pool, oid); | |
1065 | ||
1066 | ret = store->delete_system_obj(obj, objv_tracker); | |
1067 | /* cascading ret into post_modify() */ | |
1068 | ||
1069 | ret = post_modify(handler, section, key, log_data, objv_tracker, ret); | |
1070 | if (ret < 0) | |
1071 | return ret; | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | int RGWMetadataManager::get_log_shard_id(const string& section, | |
1077 | const string& key, int *shard_id) | |
1078 | { | |
1079 | RGWMetadataHandler *handler = get_handler(section); | |
1080 | if (!handler) { | |
1081 | return -EINVAL; | |
1082 | } | |
1083 | string hash_key; | |
1084 | handler->get_hash_key(section, key, hash_key); | |
1085 | *shard_id = store->key_to_shard_id(hash_key, cct->_conf->rgw_md_log_max_shards); | |
1086 | return 0; | |
1087 | } |