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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 | #include <errno.h> | |
4 | #include <boost/assign/list_of.hpp> | |
5 | #include <stddef.h> | |
6 | ||
7 | #include "common/ceph_context.h" | |
8 | #include "common/dout.h" | |
9 | #include "common/errno.h" | |
10 | #include "common/perf_counters.h" | |
11 | #include "common/WorkQueue.h" | |
12 | #include "common/Timer.h" | |
13 | ||
14 | #include "librbd/AsyncOperation.h" | |
15 | #include "librbd/AsyncRequest.h" | |
16 | #include "librbd/ExclusiveLock.h" | |
17 | #include "librbd/internal.h" | |
18 | #include "librbd/ImageCtx.h" | |
19 | #include "librbd/ImageState.h" | |
20 | #include "librbd/ImageWatcher.h" | |
21 | #include "librbd/Journal.h" | |
22 | #include "librbd/LibrbdAdminSocketHook.h" | |
23 | #include "librbd/ObjectMap.h" | |
24 | #include "librbd/Operations.h" | |
25 | #include "librbd/operation/ResizeRequest.h" | |
26 | #include "librbd/Utils.h" | |
27 | #include "librbd/LibrbdWriteback.h" | |
28 | #include "librbd/exclusive_lock/AutomaticPolicy.h" | |
29 | #include "librbd/exclusive_lock/StandardPolicy.h" | |
30 | #include "librbd/io/AioCompletion.h" | |
31 | #include "librbd/io/ImageRequestWQ.h" | |
32 | #include "librbd/journal/StandardPolicy.h" | |
33 | ||
34 | #include "osdc/Striper.h" | |
35 | #include <boost/bind.hpp> | |
36 | ||
37 | #define dout_subsys ceph_subsys_rbd | |
38 | #undef dout_prefix | |
39 | #define dout_prefix *_dout << "librbd::ImageCtx: " | |
40 | ||
41 | using std::map; | |
42 | using std::pair; | |
43 | using std::set; | |
44 | using std::string; | |
45 | using std::vector; | |
46 | ||
47 | using ceph::bufferlist; | |
48 | using librados::snap_t; | |
49 | using librados::IoCtx; | |
50 | ||
51 | namespace librbd { | |
52 | ||
53 | namespace { | |
54 | ||
55 | class ThreadPoolSingleton : public ThreadPool { | |
56 | public: | |
57 | ContextWQ *op_work_queue; | |
58 | ||
59 | explicit ThreadPoolSingleton(CephContext *cct) | |
60 | : ThreadPool(cct, "librbd::thread_pool", "tp_librbd", 1, | |
61 | "rbd_op_threads"), | |
62 | op_work_queue(new ContextWQ("librbd::op_work_queue", | |
63 | cct->_conf->rbd_op_thread_timeout, | |
64 | this)) { | |
65 | start(); | |
66 | } | |
67 | ~ThreadPoolSingleton() override { | |
68 | op_work_queue->drain(); | |
69 | delete op_work_queue; | |
70 | ||
71 | stop(); | |
72 | } | |
73 | }; | |
74 | ||
75 | class SafeTimerSingleton : public SafeTimer { | |
76 | public: | |
77 | Mutex lock; | |
78 | ||
79 | explicit SafeTimerSingleton(CephContext *cct) | |
80 | : SafeTimer(cct, lock, true), | |
81 | lock("librbd::Journal::SafeTimerSingleton::lock") { | |
82 | init(); | |
83 | } | |
84 | ~SafeTimerSingleton() { | |
85 | Mutex::Locker locker(lock); | |
86 | shutdown(); | |
87 | } | |
88 | }; | |
89 | ||
90 | struct C_FlushCache : public Context { | |
91 | ImageCtx *image_ctx; | |
92 | Context *on_safe; | |
93 | ||
94 | C_FlushCache(ImageCtx *_image_ctx, Context *_on_safe) | |
95 | : image_ctx(_image_ctx), on_safe(_on_safe) { | |
96 | } | |
97 | void finish(int r) override { | |
98 | // successful cache flush indicates all IO is now safe | |
99 | image_ctx->flush_cache(on_safe); | |
100 | } | |
101 | }; | |
102 | ||
103 | struct C_ShutDownCache : public Context { | |
104 | ImageCtx *image_ctx; | |
105 | Context *on_finish; | |
106 | ||
107 | C_ShutDownCache(ImageCtx *_image_ctx, Context *_on_finish) | |
108 | : image_ctx(_image_ctx), on_finish(_on_finish) { | |
109 | } | |
110 | void finish(int r) override { | |
111 | image_ctx->object_cacher->stop(); | |
112 | on_finish->complete(r); | |
113 | } | |
114 | }; | |
115 | ||
116 | struct C_InvalidateCache : public Context { | |
117 | ImageCtx *image_ctx; | |
118 | bool purge_on_error; | |
119 | bool reentrant_safe; | |
120 | Context *on_finish; | |
121 | ||
122 | C_InvalidateCache(ImageCtx *_image_ctx, bool _purge_on_error, | |
123 | bool _reentrant_safe, Context *_on_finish) | |
124 | : image_ctx(_image_ctx), purge_on_error(_purge_on_error), | |
125 | reentrant_safe(_reentrant_safe), on_finish(_on_finish) { | |
126 | } | |
127 | void finish(int r) override { | |
128 | assert(image_ctx->cache_lock.is_locked()); | |
129 | CephContext *cct = image_ctx->cct; | |
130 | ||
131 | if (r == -EBLACKLISTED) { | |
132 | lderr(cct) << "Blacklisted during flush! Purging cache..." << dendl; | |
133 | image_ctx->object_cacher->purge_set(image_ctx->object_set); | |
134 | } else if (r != 0 && purge_on_error) { | |
135 | lderr(cct) << "invalidate cache encountered error " | |
136 | << cpp_strerror(r) << " !Purging cache..." << dendl; | |
137 | image_ctx->object_cacher->purge_set(image_ctx->object_set); | |
138 | } else if (r != 0) { | |
139 | lderr(cct) << "flush_cache returned " << r << dendl; | |
140 | } | |
141 | ||
142 | loff_t unclean = image_ctx->object_cacher->release_set( | |
143 | image_ctx->object_set); | |
144 | if (unclean == 0) { | |
145 | r = 0; | |
146 | } else { | |
147 | lderr(cct) << "could not release all objects from cache: " | |
148 | << unclean << " bytes remain" << dendl; | |
149 | if (r == 0) { | |
150 | r = -EBUSY; | |
151 | } | |
152 | } | |
153 | ||
154 | if (reentrant_safe) { | |
155 | on_finish->complete(r); | |
156 | } else { | |
157 | image_ctx->op_work_queue->queue(on_finish, r); | |
158 | } | |
159 | } | |
160 | ||
161 | }; | |
162 | ||
163 | } // anonymous namespace | |
164 | ||
165 | const string ImageCtx::METADATA_CONF_PREFIX = "conf_"; | |
166 | ||
167 | ImageCtx::ImageCtx(const string &image_name, const string &image_id, | |
168 | const char *snap, IoCtx& p, bool ro) | |
169 | : cct((CephContext*)p.cct()), | |
170 | perfcounter(NULL), | |
171 | snap_id(CEPH_NOSNAP), | |
172 | snap_exists(true), | |
173 | read_only(ro), | |
174 | flush_encountered(false), | |
175 | exclusive_locked(false), | |
176 | name(image_name), | |
177 | image_watcher(NULL), | |
178 | journal(NULL), | |
179 | owner_lock(util::unique_lock_name("librbd::ImageCtx::owner_lock", this)), | |
180 | md_lock(util::unique_lock_name("librbd::ImageCtx::md_lock", this)), | |
181 | cache_lock(util::unique_lock_name("librbd::ImageCtx::cache_lock", this)), | |
182 | snap_lock(util::unique_lock_name("librbd::ImageCtx::snap_lock", this)), | |
183 | parent_lock(util::unique_lock_name("librbd::ImageCtx::parent_lock", this)), | |
184 | object_map_lock(util::unique_lock_name("librbd::ImageCtx::object_map_lock", this)), | |
185 | async_ops_lock(util::unique_lock_name("librbd::ImageCtx::async_ops_lock", this)), | |
186 | copyup_list_lock(util::unique_lock_name("librbd::ImageCtx::copyup_list_lock", this)), | |
187 | completed_reqs_lock(util::unique_lock_name("librbd::ImageCtx::completed_reqs_lock", this)), | |
188 | extra_read_flags(0), | |
189 | old_format(true), | |
190 | order(0), size(0), features(0), | |
191 | format_string(NULL), | |
192 | id(image_id), parent(NULL), | |
193 | stripe_unit(0), stripe_count(0), flags(0), | |
194 | object_cacher(NULL), writeback_handler(NULL), object_set(NULL), | |
195 | readahead(), | |
196 | total_bytes_read(0), | |
197 | state(new ImageState<>(this)), | |
198 | operations(new Operations<>(*this)), | |
199 | exclusive_lock(nullptr), object_map(nullptr), | |
200 | io_work_queue(nullptr), op_work_queue(nullptr), | |
201 | asok_hook(nullptr) | |
202 | { | |
203 | md_ctx.dup(p); | |
204 | data_ctx.dup(p); | |
205 | if (snap) | |
206 | snap_name = snap; | |
207 | ||
208 | memset(&header, 0, sizeof(header)); | |
209 | ||
210 | ThreadPool *thread_pool; | |
211 | get_thread_pool_instance(cct, &thread_pool, &op_work_queue); | |
212 | io_work_queue = new io::ImageRequestWQ( | |
213 | this, "librbd::io_work_queue", cct->_conf->rbd_op_thread_timeout, | |
214 | thread_pool); | |
215 | ||
216 | if (cct->_conf->rbd_auto_exclusive_lock_until_manual_request) { | |
217 | exclusive_lock_policy = new exclusive_lock::AutomaticPolicy(this); | |
218 | } else { | |
219 | exclusive_lock_policy = new exclusive_lock::StandardPolicy(this); | |
220 | } | |
221 | journal_policy = new journal::StandardPolicy<ImageCtx>(this); | |
222 | } | |
223 | ||
224 | ImageCtx::~ImageCtx() { | |
225 | assert(image_watcher == NULL); | |
226 | assert(exclusive_lock == NULL); | |
227 | assert(object_map == NULL); | |
228 | assert(journal == NULL); | |
229 | assert(asok_hook == NULL); | |
230 | ||
231 | if (perfcounter) { | |
232 | perf_stop(); | |
233 | } | |
234 | if (object_cacher) { | |
235 | delete object_cacher; | |
236 | object_cacher = NULL; | |
237 | } | |
238 | if (writeback_handler) { | |
239 | delete writeback_handler; | |
240 | writeback_handler = NULL; | |
241 | } | |
242 | if (object_set) { | |
243 | delete object_set; | |
244 | object_set = NULL; | |
245 | } | |
246 | delete[] format_string; | |
247 | ||
248 | md_ctx.aio_flush(); | |
249 | data_ctx.aio_flush(); | |
250 | io_work_queue->drain(); | |
251 | ||
252 | delete journal_policy; | |
253 | delete exclusive_lock_policy; | |
254 | delete io_work_queue; | |
255 | delete operations; | |
256 | delete state; | |
257 | } | |
258 | ||
259 | void ImageCtx::init() { | |
260 | assert(!header_oid.empty()); | |
261 | assert(old_format || !id.empty()); | |
262 | ||
263 | asok_hook = new LibrbdAdminSocketHook(this); | |
264 | ||
265 | string pname = string("librbd-") + id + string("-") + | |
266 | data_ctx.get_pool_name() + string("-") + name; | |
267 | if (!snap_name.empty()) { | |
268 | pname += "-"; | |
269 | pname += snap_name; | |
270 | } | |
271 | ||
272 | perf_start(pname); | |
273 | ||
274 | if (cache) { | |
275 | Mutex::Locker l(cache_lock); | |
276 | ldout(cct, 20) << "enabling caching..." << dendl; | |
277 | writeback_handler = new LibrbdWriteback(this, cache_lock); | |
278 | ||
279 | uint64_t init_max_dirty = cache_max_dirty; | |
280 | if (cache_writethrough_until_flush) | |
281 | init_max_dirty = 0; | |
282 | ldout(cct, 20) << "Initial cache settings:" | |
283 | << " size=" << cache_size | |
284 | << " num_objects=" << 10 | |
285 | << " max_dirty=" << init_max_dirty | |
286 | << " target_dirty=" << cache_target_dirty | |
287 | << " max_dirty_age=" | |
288 | << cache_max_dirty_age << dendl; | |
289 | ||
290 | object_cacher = new ObjectCacher(cct, pname, *writeback_handler, cache_lock, | |
291 | NULL, NULL, | |
292 | cache_size, | |
293 | 10, /* reset this in init */ | |
294 | init_max_dirty, | |
295 | cache_target_dirty, | |
296 | cache_max_dirty_age, | |
297 | cache_block_writes_upfront); | |
298 | ||
299 | // size object cache appropriately | |
300 | uint64_t obj = cache_max_dirty_object; | |
301 | if (!obj) { | |
302 | obj = MIN(2000, MAX(10, cache_size / 100 / sizeof(ObjectCacher::Object))); | |
303 | } | |
304 | ldout(cct, 10) << " cache bytes " << cache_size | |
305 | << " -> about " << obj << " objects" << dendl; | |
306 | object_cacher->set_max_objects(obj); | |
307 | ||
308 | object_set = new ObjectCacher::ObjectSet(NULL, data_ctx.get_id(), 0); | |
309 | object_set->return_enoent = true; | |
310 | object_cacher->start(); | |
311 | } | |
312 | ||
313 | readahead.set_trigger_requests(readahead_trigger_requests); | |
314 | readahead.set_max_readahead_size(readahead_max_bytes); | |
315 | } | |
316 | ||
317 | void ImageCtx::shutdown() { | |
318 | delete image_watcher; | |
319 | image_watcher = nullptr; | |
320 | ||
321 | delete asok_hook; | |
322 | asok_hook = nullptr; | |
323 | } | |
324 | ||
325 | void ImageCtx::init_layout() | |
326 | { | |
327 | if (stripe_unit == 0 || stripe_count == 0) { | |
328 | stripe_unit = 1ull << order; | |
329 | stripe_count = 1; | |
330 | } | |
331 | ||
332 | vector<uint64_t> alignments; | |
333 | alignments.push_back(stripe_count << order); // object set (in file striping terminology) | |
334 | alignments.push_back(stripe_unit * stripe_count); // stripe | |
335 | alignments.push_back(stripe_unit); // stripe unit | |
336 | readahead.set_alignments(alignments); | |
337 | ||
338 | layout = file_layout_t(); | |
339 | layout.stripe_unit = stripe_unit; | |
340 | layout.stripe_count = stripe_count; | |
341 | layout.object_size = 1ull << order; | |
342 | layout.pool_id = data_ctx.get_id(); // FIXME: pool id overflow? | |
343 | ||
344 | delete[] format_string; | |
345 | size_t len = object_prefix.length() + 16; | |
346 | format_string = new char[len]; | |
347 | if (old_format) { | |
348 | snprintf(format_string, len, "%s.%%012llx", object_prefix.c_str()); | |
349 | } else { | |
350 | snprintf(format_string, len, "%s.%%016llx", object_prefix.c_str()); | |
351 | } | |
352 | ||
353 | ldout(cct, 10) << "init_layout stripe_unit " << stripe_unit | |
354 | << " stripe_count " << stripe_count | |
355 | << " object_size " << layout.object_size | |
356 | << " prefix " << object_prefix | |
357 | << " format " << format_string | |
358 | << dendl; | |
359 | } | |
360 | ||
361 | void ImageCtx::perf_start(string name) { | |
362 | PerfCountersBuilder plb(cct, name, l_librbd_first, l_librbd_last); | |
363 | ||
364 | plb.add_u64_counter(l_librbd_rd, "rd", "Reads"); | |
365 | plb.add_u64_counter(l_librbd_rd_bytes, "rd_bytes", "Data size in reads"); | |
366 | plb.add_time_avg(l_librbd_rd_latency, "rd_latency", "Latency of reads"); | |
367 | plb.add_u64_counter(l_librbd_wr, "wr", "Writes"); | |
368 | plb.add_u64_counter(l_librbd_wr_bytes, "wr_bytes", "Written data"); | |
369 | plb.add_time_avg(l_librbd_wr_latency, "wr_latency", "Write latency"); | |
370 | plb.add_u64_counter(l_librbd_discard, "discard", "Discards"); | |
371 | plb.add_u64_counter(l_librbd_discard_bytes, "discard_bytes", "Discarded data"); | |
372 | plb.add_time_avg(l_librbd_discard_latency, "discard_latency", "Discard latency"); | |
373 | plb.add_u64_counter(l_librbd_flush, "flush", "Flushes"); | |
374 | plb.add_u64_counter(l_librbd_aio_flush, "aio_flush", "Async flushes"); | |
375 | plb.add_time_avg(l_librbd_aio_flush_latency, "aio_flush_latency", "Latency of async flushes"); | |
376 | plb.add_u64_counter(l_librbd_ws, "ws", "WriteSames"); | |
377 | plb.add_u64_counter(l_librbd_ws_bytes, "ws_bytes", "WriteSame data"); | |
378 | plb.add_time_avg(l_librbd_ws_latency, "ws_latency", "WriteSame latency"); | |
379 | plb.add_u64_counter(l_librbd_snap_create, "snap_create", "Snap creations"); | |
380 | plb.add_u64_counter(l_librbd_snap_remove, "snap_remove", "Snap removals"); | |
381 | plb.add_u64_counter(l_librbd_snap_rollback, "snap_rollback", "Snap rollbacks"); | |
382 | plb.add_u64_counter(l_librbd_snap_rename, "snap_rename", "Snap rename"); | |
383 | plb.add_u64_counter(l_librbd_notify, "notify", "Updated header notifications"); | |
384 | plb.add_u64_counter(l_librbd_resize, "resize", "Resizes"); | |
385 | plb.add_u64_counter(l_librbd_readahead, "readahead", "Read ahead"); | |
386 | plb.add_u64_counter(l_librbd_readahead_bytes, "readahead_bytes", "Data size in read ahead"); | |
387 | plb.add_u64_counter(l_librbd_invalidate_cache, "invalidate_cache", "Cache invalidates"); | |
388 | ||
389 | perfcounter = plb.create_perf_counters(); | |
390 | cct->get_perfcounters_collection()->add(perfcounter); | |
391 | } | |
392 | ||
393 | void ImageCtx::perf_stop() { | |
394 | assert(perfcounter); | |
395 | cct->get_perfcounters_collection()->remove(perfcounter); | |
396 | delete perfcounter; | |
397 | } | |
398 | ||
399 | void ImageCtx::set_read_flag(unsigned flag) { | |
400 | extra_read_flags |= flag; | |
401 | } | |
402 | ||
403 | int ImageCtx::get_read_flags(snap_t snap_id) { | |
404 | int flags = librados::OPERATION_NOFLAG | extra_read_flags; | |
405 | if (snap_id == LIBRADOS_SNAP_HEAD) | |
406 | return flags; | |
407 | ||
408 | if (balance_snap_reads) | |
409 | flags |= librados::OPERATION_BALANCE_READS; | |
410 | else if (localize_snap_reads) | |
411 | flags |= librados::OPERATION_LOCALIZE_READS; | |
412 | return flags; | |
413 | } | |
414 | ||
415 | int ImageCtx::snap_set(cls::rbd::SnapshotNamespace in_snap_namespace, | |
416 | string in_snap_name) | |
417 | { | |
418 | assert(snap_lock.is_wlocked()); | |
419 | snap_t in_snap_id = get_snap_id(in_snap_namespace, in_snap_name); | |
420 | if (in_snap_id != CEPH_NOSNAP) { | |
421 | snap_id = in_snap_id; | |
422 | snap_namespace = in_snap_namespace; | |
423 | snap_name = in_snap_name; | |
424 | snap_exists = true; | |
425 | data_ctx.snap_set_read(snap_id); | |
426 | return 0; | |
427 | } | |
428 | return -ENOENT; | |
429 | } | |
430 | ||
431 | void ImageCtx::snap_unset() | |
432 | { | |
433 | assert(snap_lock.is_wlocked()); | |
434 | snap_id = CEPH_NOSNAP; | |
435 | snap_namespace = {}; | |
436 | snap_name = ""; | |
437 | snap_exists = true; | |
438 | data_ctx.snap_set_read(snap_id); | |
439 | } | |
440 | ||
441 | snap_t ImageCtx::get_snap_id(cls::rbd::SnapshotNamespace in_snap_namespace, | |
442 | string in_snap_name) const | |
443 | { | |
444 | assert(snap_lock.is_locked()); | |
445 | auto it = snap_ids.find({in_snap_namespace, in_snap_name}); | |
446 | if (it != snap_ids.end()) | |
447 | return it->second; | |
448 | return CEPH_NOSNAP; | |
449 | } | |
450 | ||
451 | const SnapInfo* ImageCtx::get_snap_info(snap_t in_snap_id) const | |
452 | { | |
453 | assert(snap_lock.is_locked()); | |
454 | map<snap_t, SnapInfo>::const_iterator it = | |
455 | snap_info.find(in_snap_id); | |
456 | if (it != snap_info.end()) | |
457 | return &it->second; | |
458 | return NULL; | |
459 | } | |
460 | ||
461 | int ImageCtx::get_snap_name(snap_t in_snap_id, | |
462 | string *out_snap_name) const | |
463 | { | |
464 | assert(snap_lock.is_locked()); | |
465 | const SnapInfo *info = get_snap_info(in_snap_id); | |
466 | if (info) { | |
467 | *out_snap_name = info->name; | |
468 | return 0; | |
469 | } | |
470 | return -ENOENT; | |
471 | } | |
472 | ||
473 | int ImageCtx::get_snap_namespace(snap_t in_snap_id, | |
474 | cls::rbd::SnapshotNamespace *out_snap_namespace) const | |
475 | { | |
476 | assert(snap_lock.is_locked()); | |
477 | const SnapInfo *info = get_snap_info(in_snap_id); | |
478 | if (info) { | |
479 | *out_snap_namespace = info->snap_namespace; | |
480 | return 0; | |
481 | } | |
482 | return -ENOENT; | |
483 | } | |
484 | ||
485 | int ImageCtx::get_parent_spec(snap_t in_snap_id, | |
486 | ParentSpec *out_pspec) const | |
487 | { | |
488 | const SnapInfo *info = get_snap_info(in_snap_id); | |
489 | if (info) { | |
490 | *out_pspec = info->parent.spec; | |
491 | return 0; | |
492 | } | |
493 | return -ENOENT; | |
494 | } | |
495 | ||
496 | uint64_t ImageCtx::get_current_size() const | |
497 | { | |
498 | assert(snap_lock.is_locked()); | |
499 | return size; | |
500 | } | |
501 | ||
502 | uint64_t ImageCtx::get_object_size() const | |
503 | { | |
504 | return 1ull << order; | |
505 | } | |
506 | ||
507 | string ImageCtx::get_object_name(uint64_t num) const { | |
508 | char buf[object_prefix.length() + 32]; | |
509 | snprintf(buf, sizeof(buf), format_string, num); | |
510 | return string(buf); | |
511 | } | |
512 | ||
513 | uint64_t ImageCtx::get_stripe_unit() const | |
514 | { | |
515 | return stripe_unit; | |
516 | } | |
517 | ||
518 | uint64_t ImageCtx::get_stripe_count() const | |
519 | { | |
520 | return stripe_count; | |
521 | } | |
522 | ||
523 | uint64_t ImageCtx::get_stripe_period() const | |
524 | { | |
525 | return stripe_count * (1ull << order); | |
526 | } | |
527 | ||
528 | int ImageCtx::is_snap_protected(snap_t in_snap_id, | |
529 | bool *is_protected) const | |
530 | { | |
531 | assert(snap_lock.is_locked()); | |
532 | const SnapInfo *info = get_snap_info(in_snap_id); | |
533 | if (info) { | |
534 | *is_protected = | |
535 | (info->protection_status == RBD_PROTECTION_STATUS_PROTECTED); | |
536 | return 0; | |
537 | } | |
538 | return -ENOENT; | |
539 | } | |
540 | ||
541 | int ImageCtx::is_snap_unprotected(snap_t in_snap_id, | |
542 | bool *is_unprotected) const | |
543 | { | |
544 | assert(snap_lock.is_locked()); | |
545 | const SnapInfo *info = get_snap_info(in_snap_id); | |
546 | if (info) { | |
547 | *is_unprotected = | |
548 | (info->protection_status == RBD_PROTECTION_STATUS_UNPROTECTED); | |
549 | return 0; | |
550 | } | |
551 | return -ENOENT; | |
552 | } | |
553 | ||
554 | void ImageCtx::add_snap(cls::rbd::SnapshotNamespace in_snap_namespace, | |
555 | string in_snap_name, | |
556 | snap_t id, uint64_t in_size, | |
557 | const ParentInfo &parent, uint8_t protection_status, | |
558 | uint64_t flags, utime_t timestamp) | |
559 | { | |
560 | assert(snap_lock.is_wlocked()); | |
561 | snaps.push_back(id); | |
562 | SnapInfo info(in_snap_name, in_snap_namespace, | |
563 | in_size, parent, protection_status, flags, timestamp); | |
564 | snap_info.insert({id, info}); | |
565 | snap_ids.insert({{in_snap_namespace, in_snap_name}, id}); | |
566 | } | |
567 | ||
568 | void ImageCtx::rm_snap(cls::rbd::SnapshotNamespace in_snap_namespace, | |
569 | string in_snap_name, | |
570 | snap_t id) | |
571 | { | |
572 | assert(snap_lock.is_wlocked()); | |
573 | snaps.erase(std::remove(snaps.begin(), snaps.end(), id), snaps.end()); | |
574 | snap_info.erase(id); | |
575 | snap_ids.erase({in_snap_namespace, in_snap_name}); | |
576 | } | |
577 | ||
578 | uint64_t ImageCtx::get_image_size(snap_t in_snap_id) const | |
579 | { | |
580 | assert(snap_lock.is_locked()); | |
581 | if (in_snap_id == CEPH_NOSNAP) { | |
582 | if (!resize_reqs.empty() && | |
583 | resize_reqs.front()->shrinking()) { | |
584 | return resize_reqs.front()->get_image_size(); | |
585 | } | |
586 | return size; | |
587 | } | |
588 | ||
589 | const SnapInfo *info = get_snap_info(in_snap_id); | |
590 | if (info) { | |
591 | return info->size; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
596 | uint64_t ImageCtx::get_object_count(snap_t in_snap_id) const { | |
597 | assert(snap_lock.is_locked()); | |
598 | uint64_t image_size = get_image_size(in_snap_id); | |
599 | return Striper::get_num_objects(layout, image_size); | |
600 | } | |
601 | ||
602 | bool ImageCtx::test_features(uint64_t features) const | |
603 | { | |
604 | RWLock::RLocker l(snap_lock); | |
605 | return test_features(features, snap_lock); | |
606 | } | |
607 | ||
608 | bool ImageCtx::test_features(uint64_t in_features, | |
609 | const RWLock &in_snap_lock) const | |
610 | { | |
611 | assert(snap_lock.is_locked()); | |
612 | return ((features & in_features) == in_features); | |
613 | } | |
614 | ||
615 | int ImageCtx::get_flags(librados::snap_t _snap_id, uint64_t *_flags) const | |
616 | { | |
617 | assert(snap_lock.is_locked()); | |
618 | if (_snap_id == CEPH_NOSNAP) { | |
619 | *_flags = flags; | |
620 | return 0; | |
621 | } | |
622 | const SnapInfo *info = get_snap_info(_snap_id); | |
623 | if (info) { | |
624 | *_flags = info->flags; | |
625 | return 0; | |
626 | } | |
627 | return -ENOENT; | |
628 | } | |
629 | ||
630 | bool ImageCtx::test_flags(uint64_t flags) const | |
631 | { | |
632 | RWLock::RLocker l(snap_lock); | |
633 | return test_flags(flags, snap_lock); | |
634 | } | |
635 | ||
636 | bool ImageCtx::test_flags(uint64_t flags, const RWLock &in_snap_lock) const | |
637 | { | |
638 | assert(snap_lock.is_locked()); | |
639 | uint64_t snap_flags; | |
640 | get_flags(snap_id, &snap_flags); | |
641 | return ((snap_flags & flags) == flags); | |
642 | } | |
643 | ||
644 | int ImageCtx::update_flags(snap_t in_snap_id, uint64_t flag, bool enabled) | |
645 | { | |
646 | assert(snap_lock.is_wlocked()); | |
647 | uint64_t *_flags; | |
648 | if (in_snap_id == CEPH_NOSNAP) { | |
649 | _flags = &flags; | |
650 | } else { | |
651 | map<snap_t, SnapInfo>::iterator it = snap_info.find(in_snap_id); | |
652 | if (it == snap_info.end()) { | |
653 | return -ENOENT; | |
654 | } | |
655 | _flags = &it->second.flags; | |
656 | } | |
657 | ||
658 | if (enabled) { | |
659 | (*_flags) |= flag; | |
660 | } else { | |
661 | (*_flags) &= ~flag; | |
662 | } | |
663 | return 0; | |
664 | } | |
665 | ||
666 | const ParentInfo* ImageCtx::get_parent_info(snap_t in_snap_id) const | |
667 | { | |
668 | assert(snap_lock.is_locked()); | |
669 | assert(parent_lock.is_locked()); | |
670 | if (in_snap_id == CEPH_NOSNAP) | |
671 | return &parent_md; | |
672 | const SnapInfo *info = get_snap_info(in_snap_id); | |
673 | if (info) | |
674 | return &info->parent; | |
675 | return NULL; | |
676 | } | |
677 | ||
678 | int64_t ImageCtx::get_parent_pool_id(snap_t in_snap_id) const | |
679 | { | |
680 | const ParentInfo *info = get_parent_info(in_snap_id); | |
681 | if (info) | |
682 | return info->spec.pool_id; | |
683 | return -1; | |
684 | } | |
685 | ||
686 | string ImageCtx::get_parent_image_id(snap_t in_snap_id) const | |
687 | { | |
688 | const ParentInfo *info = get_parent_info(in_snap_id); | |
689 | if (info) | |
690 | return info->spec.image_id; | |
691 | return ""; | |
692 | } | |
693 | ||
694 | uint64_t ImageCtx::get_parent_snap_id(snap_t in_snap_id) const | |
695 | { | |
696 | const ParentInfo *info = get_parent_info(in_snap_id); | |
697 | if (info) | |
698 | return info->spec.snap_id; | |
699 | return CEPH_NOSNAP; | |
700 | } | |
701 | ||
702 | int ImageCtx::get_parent_overlap(snap_t in_snap_id, uint64_t *overlap) const | |
703 | { | |
704 | assert(snap_lock.is_locked()); | |
705 | const ParentInfo *info = get_parent_info(in_snap_id); | |
706 | if (info) { | |
707 | *overlap = info->overlap; | |
708 | return 0; | |
709 | } | |
710 | return -ENOENT; | |
711 | } | |
712 | ||
713 | void ImageCtx::aio_read_from_cache(object_t o, uint64_t object_no, | |
714 | bufferlist *bl, size_t len, | |
715 | uint64_t off, Context *onfinish, | |
716 | int fadvise_flags) { | |
717 | snap_lock.get_read(); | |
718 | ObjectCacher::OSDRead *rd = object_cacher->prepare_read(snap_id, bl, fadvise_flags); | |
719 | snap_lock.put_read(); | |
720 | ObjectExtent extent(o, object_no, off, len, 0); | |
721 | extent.oloc.pool = data_ctx.get_id(); | |
722 | extent.buffer_extents.push_back(make_pair(0, len)); | |
723 | rd->extents.push_back(extent); | |
724 | cache_lock.Lock(); | |
725 | int r = object_cacher->readx(rd, object_set, onfinish); | |
726 | cache_lock.Unlock(); | |
727 | if (r != 0) | |
728 | onfinish->complete(r); | |
729 | } | |
730 | ||
731 | void ImageCtx::write_to_cache(object_t o, const bufferlist& bl, size_t len, | |
732 | uint64_t off, Context *onfinish, | |
733 | int fadvise_flags, uint64_t journal_tid) { | |
734 | snap_lock.get_read(); | |
735 | ObjectCacher::OSDWrite *wr = object_cacher->prepare_write( | |
736 | snapc, bl, ceph::real_time::min(), fadvise_flags, journal_tid); | |
737 | snap_lock.put_read(); | |
738 | ObjectExtent extent(o, 0, off, len, 0); | |
739 | extent.oloc.pool = data_ctx.get_id(); | |
740 | // XXX: nspace is always default, io_ctx_impl field private | |
741 | //extent.oloc.nspace = data_ctx.io_ctx_impl->oloc.nspace; | |
742 | extent.buffer_extents.push_back(make_pair(0, len)); | |
743 | wr->extents.push_back(extent); | |
744 | { | |
745 | Mutex::Locker l(cache_lock); | |
746 | object_cacher->writex(wr, object_set, onfinish); | |
747 | } | |
748 | } | |
749 | ||
750 | void ImageCtx::user_flushed() { | |
751 | if (object_cacher && cache_writethrough_until_flush) { | |
752 | md_lock.get_read(); | |
753 | bool flushed_before = flush_encountered; | |
754 | md_lock.put_read(); | |
755 | ||
756 | uint64_t max_dirty = cache_max_dirty; | |
757 | if (!flushed_before && max_dirty > 0) { | |
758 | md_lock.get_write(); | |
759 | flush_encountered = true; | |
760 | md_lock.put_write(); | |
761 | ||
762 | ldout(cct, 10) << "saw first user flush, enabling writeback" << dendl; | |
763 | Mutex::Locker l(cache_lock); | |
764 | object_cacher->set_max_dirty(max_dirty); | |
765 | } | |
766 | } | |
767 | } | |
768 | ||
769 | void ImageCtx::flush_cache(Context *onfinish) { | |
770 | cache_lock.Lock(); | |
771 | object_cacher->flush_set(object_set, onfinish); | |
772 | cache_lock.Unlock(); | |
773 | } | |
774 | ||
775 | void ImageCtx::shut_down_cache(Context *on_finish) { | |
776 | if (object_cacher == NULL) { | |
777 | on_finish->complete(0); | |
778 | return; | |
779 | } | |
780 | ||
781 | cache_lock.Lock(); | |
782 | object_cacher->release_set(object_set); | |
783 | cache_lock.Unlock(); | |
784 | ||
785 | C_ShutDownCache *shut_down = new C_ShutDownCache(this, on_finish); | |
786 | flush_cache(new C_InvalidateCache(this, true, false, shut_down)); | |
787 | } | |
788 | ||
789 | int ImageCtx::invalidate_cache(bool purge_on_error) { | |
790 | flush_async_operations(); | |
791 | if (object_cacher == NULL) { | |
792 | return 0; | |
793 | } | |
794 | ||
795 | cache_lock.Lock(); | |
796 | object_cacher->release_set(object_set); | |
797 | cache_lock.Unlock(); | |
798 | ||
799 | C_SaferCond ctx; | |
800 | flush_cache(new C_InvalidateCache(this, purge_on_error, true, &ctx)); | |
801 | ||
802 | int result = ctx.wait(); | |
803 | return result; | |
804 | } | |
805 | ||
806 | void ImageCtx::invalidate_cache(bool purge_on_error, Context *on_finish) { | |
807 | if (object_cacher == NULL) { | |
808 | op_work_queue->queue(on_finish, 0); | |
809 | return; | |
810 | } | |
811 | ||
812 | cache_lock.Lock(); | |
813 | object_cacher->release_set(object_set); | |
814 | cache_lock.Unlock(); | |
815 | ||
816 | flush_cache(new C_InvalidateCache(this, purge_on_error, false, on_finish)); | |
817 | } | |
818 | ||
819 | void ImageCtx::clear_nonexistence_cache() { | |
820 | assert(cache_lock.is_locked()); | |
821 | if (!object_cacher) | |
822 | return; | |
823 | object_cacher->clear_nonexistence(object_set); | |
824 | } | |
825 | ||
826 | bool ImageCtx::is_cache_empty() { | |
827 | Mutex::Locker locker(cache_lock); | |
828 | return object_cacher->set_is_empty(object_set); | |
829 | } | |
830 | ||
831 | void ImageCtx::register_watch(Context *on_finish) { | |
832 | assert(image_watcher == NULL); | |
833 | image_watcher = new ImageWatcher<>(*this); | |
834 | image_watcher->register_watch(on_finish); | |
835 | } | |
836 | ||
837 | uint64_t ImageCtx::prune_parent_extents(vector<pair<uint64_t,uint64_t> >& objectx, | |
838 | uint64_t overlap) | |
839 | { | |
840 | // drop extents completely beyond the overlap | |
841 | while (!objectx.empty() && objectx.back().first >= overlap) | |
842 | objectx.pop_back(); | |
843 | ||
844 | // trim final overlapping extent | |
845 | if (!objectx.empty() && objectx.back().first + objectx.back().second > overlap) | |
846 | objectx.back().second = overlap - objectx.back().first; | |
847 | ||
848 | uint64_t len = 0; | |
849 | for (vector<pair<uint64_t,uint64_t> >::iterator p = objectx.begin(); | |
850 | p != objectx.end(); | |
851 | ++p) | |
852 | len += p->second; | |
853 | ldout(cct, 10) << "prune_parent_extents image overlap " << overlap | |
854 | << ", object overlap " << len | |
855 | << " from image extents " << objectx << dendl; | |
856 | return len; | |
857 | } | |
858 | ||
859 | void ImageCtx::flush_async_operations() { | |
860 | C_SaferCond ctx; | |
861 | flush_async_operations(&ctx); | |
862 | ctx.wait(); | |
863 | } | |
864 | ||
865 | void ImageCtx::flush_async_operations(Context *on_finish) { | |
866 | { | |
867 | Mutex::Locker l(async_ops_lock); | |
868 | if (!async_ops.empty()) { | |
869 | ldout(cct, 20) << "flush async operations: " << on_finish << " " | |
870 | << "count=" << async_ops.size() << dendl; | |
871 | async_ops.front()->add_flush_context(on_finish); | |
872 | return; | |
873 | } | |
874 | } | |
875 | on_finish->complete(0); | |
876 | } | |
877 | ||
878 | int ImageCtx::flush() { | |
879 | C_SaferCond cond_ctx; | |
880 | flush(&cond_ctx); | |
881 | return cond_ctx.wait(); | |
882 | } | |
883 | ||
884 | void ImageCtx::flush(Context *on_safe) { | |
885 | // ensure no locks are held when flush is complete | |
886 | on_safe = util::create_async_context_callback(*this, on_safe); | |
887 | ||
888 | if (object_cacher != NULL) { | |
889 | // flush cache after completing all in-flight AIO ops | |
890 | on_safe = new C_FlushCache(this, on_safe); | |
891 | } | |
892 | flush_async_operations(on_safe); | |
893 | } | |
894 | ||
895 | void ImageCtx::cancel_async_requests() { | |
896 | C_SaferCond ctx; | |
897 | cancel_async_requests(&ctx); | |
898 | ctx.wait(); | |
899 | } | |
900 | ||
901 | void ImageCtx::cancel_async_requests(Context *on_finish) { | |
902 | { | |
903 | Mutex::Locker async_ops_locker(async_ops_lock); | |
904 | if (!async_requests.empty()) { | |
905 | ldout(cct, 10) << "canceling async requests: count=" | |
906 | << async_requests.size() << dendl; | |
907 | for (auto req : async_requests) { | |
908 | ldout(cct, 10) << "canceling async request: " << req << dendl; | |
909 | req->cancel(); | |
910 | } | |
911 | async_requests_waiters.push_back(on_finish); | |
912 | return; | |
913 | } | |
914 | } | |
915 | ||
916 | on_finish->complete(0); | |
917 | } | |
918 | ||
919 | void ImageCtx::clear_pending_completions() { | |
920 | Mutex::Locker l(completed_reqs_lock); | |
921 | ldout(cct, 10) << "clear pending AioCompletion: count=" | |
922 | << completed_reqs.size() << dendl; | |
923 | completed_reqs.clear(); | |
924 | } | |
925 | ||
926 | bool ImageCtx::_filter_metadata_confs(const string &prefix, | |
927 | map<string, bool> &configs, | |
928 | const map<string, bufferlist> &pairs, | |
929 | map<string, bufferlist> *res) { | |
930 | size_t conf_prefix_len = prefix.size(); | |
931 | ||
932 | for (auto it : pairs) { | |
933 | if (it.first.compare(0, MIN(conf_prefix_len, it.first.size()), prefix) > 0) | |
934 | return false; | |
935 | ||
936 | if (it.first.size() <= conf_prefix_len) | |
937 | continue; | |
938 | ||
939 | string key = it.first.substr(conf_prefix_len, it.first.size() - conf_prefix_len); | |
940 | auto cit = configs.find(key); | |
941 | if (cit != configs.end()) { | |
942 | cit->second = true; | |
943 | res->insert(make_pair(key, it.second)); | |
944 | } | |
945 | } | |
946 | return true; | |
947 | } | |
948 | ||
949 | void ImageCtx::apply_metadata(const std::map<std::string, bufferlist> &meta) { | |
950 | ldout(cct, 20) << __func__ << dendl; | |
951 | std::map<string, bool> configs = boost::assign::map_list_of( | |
952 | "rbd_non_blocking_aio", false)( | |
953 | "rbd_cache", false)( | |
954 | "rbd_cache_writethrough_until_flush", false)( | |
955 | "rbd_cache_size", false)( | |
956 | "rbd_cache_max_dirty", false)( | |
957 | "rbd_cache_target_dirty", false)( | |
958 | "rbd_cache_max_dirty_age", false)( | |
959 | "rbd_cache_max_dirty_object", false)( | |
960 | "rbd_cache_block_writes_upfront", false)( | |
961 | "rbd_concurrent_management_ops", false)( | |
962 | "rbd_balance_snap_reads", false)( | |
963 | "rbd_localize_snap_reads", false)( | |
964 | "rbd_balance_parent_reads", false)( | |
965 | "rbd_localize_parent_reads", false)( | |
966 | "rbd_readahead_trigger_requests", false)( | |
967 | "rbd_readahead_max_bytes", false)( | |
968 | "rbd_readahead_disable_after_bytes", false)( | |
969 | "rbd_clone_copy_on_read", false)( | |
970 | "rbd_blacklist_on_break_lock", false)( | |
971 | "rbd_blacklist_expire_seconds", false)( | |
972 | "rbd_request_timed_out_seconds", false)( | |
973 | "rbd_journal_order", false)( | |
974 | "rbd_journal_splay_width", false)( | |
975 | "rbd_journal_commit_age", false)( | |
976 | "rbd_journal_object_flush_interval", false)( | |
977 | "rbd_journal_object_flush_bytes", false)( | |
978 | "rbd_journal_object_flush_age", false)( | |
979 | "rbd_journal_pool", false)( | |
980 | "rbd_journal_max_payload_bytes", false)( | |
981 | "rbd_journal_max_concurrent_object_sets", false)( | |
982 | "rbd_mirroring_resync_after_disconnect", false)( | |
983 | "rbd_mirroring_replay_delay", false)( | |
984 | "rbd_skip_partial_discard", false); | |
985 | ||
986 | md_config_t local_config_t; | |
987 | std::map<std::string, bufferlist> res; | |
988 | ||
989 | _filter_metadata_confs(METADATA_CONF_PREFIX, configs, meta, &res); | |
990 | for (auto it : res) { | |
991 | std::string val(it.second.c_str(), it.second.length()); | |
992 | int j = local_config_t.set_val(it.first.c_str(), val); | |
993 | if (j < 0) { | |
994 | lderr(cct) << __func__ << " failed to set config " << it.first | |
995 | << " with value " << it.second.c_str() << ": " << j | |
996 | << dendl; | |
997 | } | |
998 | } | |
999 | ||
1000 | #define ASSIGN_OPTION(config) \ | |
1001 | do { \ | |
1002 | string key = "rbd_"; \ | |
1003 | key = key + #config; \ | |
1004 | if (configs[key]) \ | |
1005 | config = local_config_t.rbd_##config; \ | |
1006 | else \ | |
1007 | config = cct->_conf->rbd_##config; \ | |
1008 | } while (0); | |
1009 | ||
1010 | ASSIGN_OPTION(non_blocking_aio); | |
1011 | ASSIGN_OPTION(cache); | |
1012 | ASSIGN_OPTION(cache_writethrough_until_flush); | |
1013 | ASSIGN_OPTION(cache_size); | |
1014 | ASSIGN_OPTION(cache_max_dirty); | |
1015 | ASSIGN_OPTION(cache_target_dirty); | |
1016 | ASSIGN_OPTION(cache_max_dirty_age); | |
1017 | ASSIGN_OPTION(cache_max_dirty_object); | |
1018 | ASSIGN_OPTION(cache_block_writes_upfront); | |
1019 | ASSIGN_OPTION(concurrent_management_ops); | |
1020 | ASSIGN_OPTION(balance_snap_reads); | |
1021 | ASSIGN_OPTION(localize_snap_reads); | |
1022 | ASSIGN_OPTION(balance_parent_reads); | |
1023 | ASSIGN_OPTION(localize_parent_reads); | |
1024 | ASSIGN_OPTION(readahead_trigger_requests); | |
1025 | ASSIGN_OPTION(readahead_max_bytes); | |
1026 | ASSIGN_OPTION(readahead_disable_after_bytes); | |
1027 | ASSIGN_OPTION(clone_copy_on_read); | |
1028 | ASSIGN_OPTION(blacklist_on_break_lock); | |
1029 | ASSIGN_OPTION(blacklist_expire_seconds); | |
1030 | ASSIGN_OPTION(request_timed_out_seconds); | |
1031 | ASSIGN_OPTION(enable_alloc_hint); | |
1032 | ASSIGN_OPTION(journal_order); | |
1033 | ASSIGN_OPTION(journal_splay_width); | |
1034 | ASSIGN_OPTION(journal_commit_age); | |
1035 | ASSIGN_OPTION(journal_object_flush_interval); | |
1036 | ASSIGN_OPTION(journal_object_flush_bytes); | |
1037 | ASSIGN_OPTION(journal_object_flush_age); | |
1038 | ASSIGN_OPTION(journal_pool); | |
1039 | ASSIGN_OPTION(journal_max_payload_bytes); | |
1040 | ASSIGN_OPTION(journal_max_concurrent_object_sets); | |
1041 | ASSIGN_OPTION(mirroring_resync_after_disconnect); | |
1042 | ASSIGN_OPTION(mirroring_replay_delay); | |
1043 | ASSIGN_OPTION(skip_partial_discard); | |
1044 | } | |
1045 | ||
1046 | ExclusiveLock<ImageCtx> *ImageCtx::create_exclusive_lock() { | |
1047 | return new ExclusiveLock<ImageCtx>(*this); | |
1048 | } | |
1049 | ||
1050 | ObjectMap<ImageCtx> *ImageCtx::create_object_map(uint64_t snap_id) { | |
1051 | return new ObjectMap<ImageCtx>(*this, snap_id); | |
1052 | } | |
1053 | ||
1054 | Journal<ImageCtx> *ImageCtx::create_journal() { | |
1055 | return new Journal<ImageCtx>(*this); | |
1056 | } | |
1057 | ||
1058 | void ImageCtx::set_image_name(const std::string &image_name) { | |
1059 | // update the name so rename can be invoked repeatedly | |
1060 | RWLock::RLocker owner_locker(owner_lock); | |
1061 | RWLock::WLocker snap_locker(snap_lock); | |
1062 | name = image_name; | |
1063 | if (old_format) { | |
1064 | header_oid = util::old_header_name(image_name); | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | void ImageCtx::notify_update() { | |
1069 | state->handle_update_notification(); | |
1070 | ImageWatcher<>::notify_header_update(md_ctx, header_oid); | |
1071 | } | |
1072 | ||
1073 | void ImageCtx::notify_update(Context *on_finish) { | |
1074 | state->handle_update_notification(); | |
1075 | image_watcher->notify_header_update(on_finish); | |
1076 | } | |
1077 | ||
1078 | exclusive_lock::Policy *ImageCtx::get_exclusive_lock_policy() const { | |
1079 | assert(owner_lock.is_locked()); | |
1080 | assert(exclusive_lock_policy != nullptr); | |
1081 | return exclusive_lock_policy; | |
1082 | } | |
1083 | ||
1084 | void ImageCtx::set_exclusive_lock_policy(exclusive_lock::Policy *policy) { | |
1085 | assert(owner_lock.is_wlocked()); | |
1086 | assert(policy != nullptr); | |
1087 | delete exclusive_lock_policy; | |
1088 | exclusive_lock_policy = policy; | |
1089 | } | |
1090 | ||
1091 | journal::Policy *ImageCtx::get_journal_policy() const { | |
1092 | assert(snap_lock.is_locked()); | |
1093 | assert(journal_policy != nullptr); | |
1094 | return journal_policy; | |
1095 | } | |
1096 | ||
1097 | void ImageCtx::set_journal_policy(journal::Policy *policy) { | |
1098 | assert(snap_lock.is_wlocked()); | |
1099 | assert(policy != nullptr); | |
1100 | delete journal_policy; | |
1101 | journal_policy = policy; | |
1102 | } | |
1103 | ||
1104 | void ImageCtx::get_thread_pool_instance(CephContext *cct, | |
1105 | ThreadPool **thread_pool, | |
1106 | ContextWQ **op_work_queue) { | |
1107 | ThreadPoolSingleton *thread_pool_singleton; | |
1108 | cct->lookup_or_create_singleton_object<ThreadPoolSingleton>( | |
1109 | thread_pool_singleton, "librbd::thread_pool"); | |
1110 | *thread_pool = thread_pool_singleton; | |
1111 | *op_work_queue = thread_pool_singleton->op_work_queue; | |
1112 | } | |
1113 | ||
1114 | void ImageCtx::get_timer_instance(CephContext *cct, SafeTimer **timer, | |
1115 | Mutex **timer_lock) { | |
1116 | SafeTimerSingleton *safe_timer_singleton; | |
1117 | cct->lookup_or_create_singleton_object<SafeTimerSingleton>( | |
1118 | safe_timer_singleton, "librbd::journal::safe_timer"); | |
1119 | *timer = safe_timer_singleton; | |
1120 | *timer_lock = &safe_timer_singleton->lock; | |
1121 | } | |
1122 | } |