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7c673cae FG |
1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include "cls/rbd/cls_rbd_types.h" | |
5 | #include "librbd/operation/SnapshotCreateRequest.h" | |
6 | #include "common/dout.h" | |
7 | #include "common/errno.h" | |
8 | #include "librbd/ExclusiveLock.h" | |
9 | #include "librbd/ImageCtx.h" | |
f67539c2 | 10 | #include "librbd/ImageWatcher.h" |
7c673cae FG |
11 | #include "librbd/ObjectMap.h" |
12 | #include "librbd/Utils.h" | |
f67539c2 | 13 | #include "librbd/io/ImageDispatcherInterface.h" |
9f95a23c | 14 | #include "librbd/mirror/snapshot/SetImageStateRequest.h" |
7c673cae FG |
15 | |
16 | #define dout_subsys ceph_subsys_rbd | |
17 | #undef dout_prefix | |
18 | #define dout_prefix *_dout << "librbd::SnapshotCreateRequest: " | |
19 | ||
20 | namespace librbd { | |
21 | namespace operation { | |
22 | ||
23 | using util::create_async_context_callback; | |
24 | using util::create_context_callback; | |
25 | using util::create_rados_callback; | |
26 | ||
27 | template <typename I> | |
28 | SnapshotCreateRequest<I>::SnapshotCreateRequest(I &image_ctx, | |
29 | Context *on_finish, | |
30 | const cls::rbd::SnapshotNamespace &snap_namespace, | |
31 | const std::string &snap_name, | |
32 | uint64_t journal_op_tid, | |
f67539c2 TL |
33 | uint64_t flags, |
34 | ProgressContext &prog_ctx) | |
7c673cae FG |
35 | : Request<I>(image_ctx, on_finish, journal_op_tid), |
36 | m_snap_namespace(snap_namespace), m_snap_name(snap_name), | |
f67539c2 TL |
37 | m_skip_object_map(flags & SNAP_CREATE_FLAG_SKIP_OBJECT_MAP), |
38 | m_skip_notify_quiesce(flags & SNAP_CREATE_FLAG_SKIP_NOTIFY_QUIESCE), | |
39 | m_ignore_notify_quiesce_error(flags & SNAP_CREATE_FLAG_IGNORE_NOTIFY_QUIESCE_ERROR), | |
40 | m_prog_ctx(prog_ctx) { | |
7c673cae FG |
41 | } |
42 | ||
43 | template <typename I> | |
44 | void SnapshotCreateRequest<I>::send_op() { | |
eafe8130 TL |
45 | I &image_ctx = this->m_image_ctx; |
46 | CephContext *cct = image_ctx.cct; | |
47 | ||
48 | if (!image_ctx.data_ctx.is_valid()) { | |
49 | lderr(cct) << "missing data pool" << dendl; | |
50 | this->async_complete(-ENODEV); | |
51 | return; | |
52 | } | |
53 | ||
f67539c2 TL |
54 | send_notify_quiesce(); |
55 | } | |
56 | ||
57 | template <typename I> | |
58 | void SnapshotCreateRequest<I>::send_notify_quiesce() { | |
59 | if (m_skip_notify_quiesce) { | |
60 | send_suspend_requests(); | |
61 | return; | |
62 | } | |
63 | ||
64 | I &image_ctx = this->m_image_ctx; | |
65 | CephContext *cct = image_ctx.cct; | |
66 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
67 | ||
68 | image_ctx.image_watcher->notify_quiesce( | |
69 | &m_request_id, m_prog_ctx, create_async_context_callback( | |
70 | image_ctx, create_context_callback<SnapshotCreateRequest<I>, | |
71 | &SnapshotCreateRequest<I>::handle_notify_quiesce>(this))); | |
72 | } | |
73 | ||
74 | template <typename I> | |
75 | Context *SnapshotCreateRequest<I>::handle_notify_quiesce(int *result) { | |
76 | I &image_ctx = this->m_image_ctx; | |
77 | CephContext *cct = image_ctx.cct; | |
78 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
79 | ||
80 | if (*result < 0 && !m_ignore_notify_quiesce_error) { | |
81 | lderr(cct) << "failed to notify quiesce: " << cpp_strerror(*result) | |
82 | << dendl; | |
83 | save_result(result); | |
84 | send_notify_unquiesce(); | |
85 | return nullptr; | |
86 | } | |
87 | ||
88 | std::shared_lock owner_locker{image_ctx.owner_lock}; | |
7c673cae | 89 | send_suspend_requests(); |
f67539c2 | 90 | return nullptr; |
7c673cae FG |
91 | } |
92 | ||
93 | template <typename I> | |
94 | void SnapshotCreateRequest<I>::send_suspend_requests() { | |
95 | I &image_ctx = this->m_image_ctx; | |
96 | CephContext *cct = image_ctx.cct; | |
97 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
98 | ||
99 | // TODO suspend (shrink) resize to ensure consistent RBD mirror | |
100 | send_suspend_aio(); | |
101 | } | |
102 | ||
103 | template <typename I> | |
104 | Context *SnapshotCreateRequest<I>::handle_suspend_requests(int *result) { | |
105 | I &image_ctx = this->m_image_ctx; | |
106 | CephContext *cct = image_ctx.cct; | |
107 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
108 | ||
109 | // TODO | |
110 | send_suspend_aio(); | |
111 | return nullptr; | |
112 | } | |
113 | ||
114 | template <typename I> | |
115 | void SnapshotCreateRequest<I>::send_suspend_aio() { | |
116 | I &image_ctx = this->m_image_ctx; | |
9f95a23c | 117 | ceph_assert(ceph_mutex_is_locked(image_ctx.owner_lock)); |
7c673cae FG |
118 | |
119 | CephContext *cct = image_ctx.cct; | |
120 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
121 | ||
f67539c2 | 122 | image_ctx.io_image_dispatcher->block_writes(create_context_callback< |
7c673cae FG |
123 | SnapshotCreateRequest<I>, |
124 | &SnapshotCreateRequest<I>::handle_suspend_aio>(this)); | |
125 | } | |
126 | ||
127 | template <typename I> | |
128 | Context *SnapshotCreateRequest<I>::handle_suspend_aio(int *result) { | |
129 | I &image_ctx = this->m_image_ctx; | |
130 | CephContext *cct = image_ctx.cct; | |
131 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
132 | ||
133 | if (*result < 0) { | |
134 | lderr(cct) << "failed to block writes: " << cpp_strerror(*result) << dendl; | |
f67539c2 TL |
135 | save_result(result); |
136 | return send_notify_unquiesce(); | |
7c673cae FG |
137 | } |
138 | ||
f67539c2 TL |
139 | m_writes_blocked = true; |
140 | ||
7c673cae FG |
141 | send_append_op_event(); |
142 | return nullptr; | |
143 | } | |
144 | ||
145 | template <typename I> | |
146 | void SnapshotCreateRequest<I>::send_append_op_event() { | |
147 | I &image_ctx = this->m_image_ctx; | |
148 | if (!this->template append_op_event< | |
149 | SnapshotCreateRequest<I>, | |
150 | &SnapshotCreateRequest<I>::handle_append_op_event>(this)) { | |
151 | send_allocate_snap_id(); | |
152 | return; | |
153 | } | |
154 | ||
155 | CephContext *cct = image_ctx.cct; | |
156 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
157 | } | |
158 | ||
159 | template <typename I> | |
160 | Context *SnapshotCreateRequest<I>::handle_append_op_event(int *result) { | |
161 | I &image_ctx = this->m_image_ctx; | |
162 | CephContext *cct = image_ctx.cct; | |
163 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
164 | ||
165 | if (*result < 0) { | |
7c673cae FG |
166 | lderr(cct) << "failed to commit journal entry: " << cpp_strerror(*result) |
167 | << dendl; | |
f67539c2 TL |
168 | save_result(result); |
169 | return send_notify_unquiesce(); | |
7c673cae FG |
170 | } |
171 | ||
172 | send_allocate_snap_id(); | |
173 | return nullptr; | |
174 | } | |
175 | ||
176 | template <typename I> | |
177 | void SnapshotCreateRequest<I>::send_allocate_snap_id() { | |
178 | I &image_ctx = this->m_image_ctx; | |
179 | CephContext *cct = image_ctx.cct; | |
180 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
181 | ||
182 | librados::AioCompletion *rados_completion = create_rados_callback< | |
183 | SnapshotCreateRequest<I>, | |
184 | &SnapshotCreateRequest<I>::handle_allocate_snap_id>(this); | |
3efd9988 | 185 | image_ctx.data_ctx.aio_selfmanaged_snap_create(&m_snap_id, rados_completion); |
7c673cae FG |
186 | rados_completion->release(); |
187 | } | |
188 | ||
189 | template <typename I> | |
190 | Context *SnapshotCreateRequest<I>::handle_allocate_snap_id(int *result) { | |
191 | I &image_ctx = this->m_image_ctx; | |
192 | CephContext *cct = image_ctx.cct; | |
193 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << ", " | |
194 | << "snap_id=" << m_snap_id << dendl; | |
195 | ||
196 | if (*result < 0) { | |
7c673cae FG |
197 | lderr(cct) << "failed to allocate snapshot id: " << cpp_strerror(*result) |
198 | << dendl; | |
f67539c2 TL |
199 | save_result(result); |
200 | return send_notify_unquiesce(); | |
7c673cae FG |
201 | } |
202 | ||
203 | send_create_snap(); | |
204 | return nullptr; | |
205 | } | |
206 | ||
207 | template <typename I> | |
208 | void SnapshotCreateRequest<I>::send_create_snap() { | |
209 | I &image_ctx = this->m_image_ctx; | |
210 | CephContext *cct = image_ctx.cct; | |
211 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
212 | ||
9f95a23c TL |
213 | std::shared_lock owner_locker{image_ctx.owner_lock}; |
214 | std::shared_lock image_locker{image_ctx.image_lock}; | |
7c673cae FG |
215 | |
216 | // should have been canceled prior to releasing lock | |
11fdf7f2 TL |
217 | ceph_assert(image_ctx.exclusive_lock == nullptr || |
218 | image_ctx.exclusive_lock->is_lock_owner()); | |
7c673cae FG |
219 | |
220 | // save current size / parent info for creating snapshot record in ImageCtx | |
221 | m_size = image_ctx.size; | |
222 | m_parent_info = image_ctx.parent_md; | |
223 | ||
224 | librados::ObjectWriteOperation op; | |
225 | if (image_ctx.old_format) { | |
226 | cls_client::old_snapshot_add(&op, m_snap_id, m_snap_name); | |
227 | } else { | |
228 | cls_client::snapshot_add(&op, m_snap_id, m_snap_name, m_snap_namespace); | |
229 | } | |
230 | ||
231 | librados::AioCompletion *rados_completion = create_rados_callback< | |
232 | SnapshotCreateRequest<I>, | |
233 | &SnapshotCreateRequest<I>::handle_create_snap>(this); | |
234 | int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid, | |
235 | rados_completion, &op); | |
11fdf7f2 | 236 | ceph_assert(r == 0); |
7c673cae FG |
237 | rados_completion->release(); |
238 | } | |
239 | ||
240 | template <typename I> | |
241 | Context *SnapshotCreateRequest<I>::handle_create_snap(int *result) { | |
242 | I &image_ctx = this->m_image_ctx; | |
243 | CephContext *cct = image_ctx.cct; | |
244 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
245 | ||
246 | if (*result == -ESTALE) { | |
247 | send_allocate_snap_id(); | |
248 | return nullptr; | |
249 | } else if (*result < 0) { | |
250 | save_result(result); | |
251 | send_release_snap_id(); | |
252 | return nullptr; | |
253 | } | |
254 | ||
255 | return send_create_object_map(); | |
256 | } | |
257 | ||
258 | template <typename I> | |
259 | Context *SnapshotCreateRequest<I>::send_create_object_map() { | |
260 | I &image_ctx = this->m_image_ctx; | |
261 | ||
9f95a23c | 262 | image_ctx.image_lock.lock_shared(); |
7c673cae | 263 | if (image_ctx.object_map == nullptr || m_skip_object_map) { |
9f95a23c TL |
264 | image_ctx.image_lock.unlock_shared(); |
265 | ||
266 | return send_create_image_state(); | |
267 | } | |
268 | ||
269 | CephContext *cct = image_ctx.cct; | |
270 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
271 | ||
272 | image_ctx.object_map->snapshot_add( | |
273 | m_snap_id, create_context_callback< | |
274 | SnapshotCreateRequest<I>, | |
275 | &SnapshotCreateRequest<I>::handle_create_object_map>(this)); | |
276 | image_ctx.image_lock.unlock_shared(); | |
277 | return nullptr; | |
278 | } | |
279 | ||
280 | template <typename I> | |
281 | Context *SnapshotCreateRequest<I>::handle_create_object_map(int *result) { | |
282 | I &image_ctx = this->m_image_ctx; | |
283 | CephContext *cct = image_ctx.cct; | |
284 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
285 | ||
286 | if (*result < 0) { | |
287 | lderr(cct) << this << " " << __func__ << ": failed to snapshot object map: " | |
288 | << cpp_strerror(*result) << dendl; | |
7c673cae | 289 | |
f67539c2 | 290 | save_result(result); |
9f95a23c | 291 | update_snap_context(); |
f67539c2 | 292 | return send_notify_unquiesce(); |
9f95a23c TL |
293 | } |
294 | ||
295 | return send_create_image_state(); | |
296 | } | |
297 | ||
298 | template <typename I> | |
299 | Context *SnapshotCreateRequest<I>::send_create_image_state() { | |
300 | I &image_ctx = this->m_image_ctx; | |
1e59de90 | 301 | auto mirror_ns = std::get_if<cls::rbd::MirrorSnapshotNamespace>( |
9f95a23c TL |
302 | &m_snap_namespace); |
303 | if (mirror_ns == nullptr || !mirror_ns->is_primary()) { | |
91327a77 | 304 | update_snap_context(); |
f67539c2 | 305 | return send_notify_unquiesce(); |
7c673cae FG |
306 | } |
307 | ||
308 | CephContext *cct = image_ctx.cct; | |
309 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
310 | ||
9f95a23c TL |
311 | auto req = mirror::snapshot::SetImageStateRequest<I>::create( |
312 | &image_ctx, m_snap_id, create_context_callback< | |
313 | SnapshotCreateRequest<I>, | |
314 | &SnapshotCreateRequest<I>::handle_create_image_state>(this)); | |
315 | req->send(); | |
7c673cae FG |
316 | return nullptr; |
317 | } | |
318 | ||
319 | template <typename I> | |
9f95a23c | 320 | Context *SnapshotCreateRequest<I>::handle_create_image_state(int *result) { |
7c673cae FG |
321 | I &image_ctx = this->m_image_ctx; |
322 | CephContext *cct = image_ctx.cct; | |
323 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
324 | ||
91327a77 | 325 | update_snap_context(); |
91327a77 | 326 | if (*result < 0) { |
f67539c2 | 327 | lderr(cct) << this << " " << __func__ << ": failed to create image state: " |
91327a77 | 328 | << cpp_strerror(*result) << dendl; |
f67539c2 | 329 | save_result(result); |
91327a77 AA |
330 | } |
331 | ||
f67539c2 | 332 | return send_notify_unquiesce(); |
7c673cae FG |
333 | } |
334 | ||
335 | template <typename I> | |
336 | void SnapshotCreateRequest<I>::send_release_snap_id() { | |
337 | I &image_ctx = this->m_image_ctx; | |
338 | CephContext *cct = image_ctx.cct; | |
339 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
340 | ||
11fdf7f2 | 341 | ceph_assert(m_snap_id != CEPH_NOSNAP); |
7c673cae FG |
342 | |
343 | librados::AioCompletion *rados_completion = create_rados_callback< | |
344 | SnapshotCreateRequest<I>, | |
345 | &SnapshotCreateRequest<I>::handle_release_snap_id>(this); | |
3efd9988 | 346 | image_ctx.data_ctx.aio_selfmanaged_snap_remove(m_snap_id, rados_completion); |
7c673cae FG |
347 | rados_completion->release(); |
348 | } | |
349 | ||
350 | template <typename I> | |
351 | Context *SnapshotCreateRequest<I>::handle_release_snap_id(int *result) { | |
352 | I &image_ctx = this->m_image_ctx; | |
353 | CephContext *cct = image_ctx.cct; | |
354 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
355 | ||
f67539c2 TL |
356 | return send_notify_unquiesce(); |
357 | } | |
358 | ||
359 | template <typename I> | |
360 | Context *SnapshotCreateRequest<I>::send_notify_unquiesce() { | |
361 | I &image_ctx = this->m_image_ctx; | |
362 | CephContext *cct = image_ctx.cct; | |
363 | ||
364 | if (m_writes_blocked) { | |
365 | image_ctx.io_image_dispatcher->unblock_writes(); | |
366 | } | |
7c673cae | 367 | |
f67539c2 TL |
368 | if (m_skip_notify_quiesce) { |
369 | return this->create_context_finisher(m_ret_val); | |
370 | } | |
371 | ||
372 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
373 | ||
374 | image_ctx.image_watcher->notify_unquiesce( | |
375 | m_request_id, create_context_callback< | |
376 | SnapshotCreateRequest<I>, | |
377 | &SnapshotCreateRequest<I>::handle_notify_unquiesce>(this)); | |
378 | ||
379 | return nullptr; | |
380 | } | |
381 | ||
382 | template <typename I> | |
383 | Context *SnapshotCreateRequest<I>::handle_notify_unquiesce(int *result) { | |
384 | I &image_ctx = this->m_image_ctx; | |
385 | CephContext *cct = image_ctx.cct; | |
386 | ldout(cct, 5) << this << " " << __func__ << ": r=" << *result << dendl; | |
387 | ||
388 | if (*result < 0) { | |
389 | lderr(cct) << "failed to notify unquiesce: " << cpp_strerror(*result) | |
390 | << dendl; | |
391 | // ignore error | |
392 | } | |
393 | ||
394 | *result = m_ret_val; | |
7c673cae FG |
395 | return this->create_context_finisher(m_ret_val); |
396 | } | |
397 | ||
398 | template <typename I> | |
399 | void SnapshotCreateRequest<I>::update_snap_context() { | |
400 | I &image_ctx = this->m_image_ctx; | |
401 | ||
9f95a23c TL |
402 | std::shared_lock owner_locker{image_ctx.owner_lock}; |
403 | std::unique_lock image_locker{image_ctx.image_lock}; | |
7c673cae FG |
404 | if (image_ctx.get_snap_info(m_snap_id) != NULL) { |
405 | return; | |
406 | } | |
407 | ||
408 | CephContext *cct = image_ctx.cct; | |
409 | ldout(cct, 5) << this << " " << __func__ << dendl; | |
410 | ||
411 | // should have been canceled prior to releasing lock | |
11fdf7f2 TL |
412 | ceph_assert(image_ctx.exclusive_lock == nullptr || |
413 | image_ctx.exclusive_lock->is_lock_owner()); | |
7c673cae FG |
414 | |
415 | // immediately add a reference to the new snapshot | |
416 | utime_t snap_time = ceph_clock_now(); | |
417 | image_ctx.add_snap(m_snap_namespace, m_snap_name, m_snap_id, m_size, | |
418 | m_parent_info, RBD_PROTECTION_STATUS_UNPROTECTED, | |
419 | 0, snap_time); | |
420 | ||
421 | // immediately start using the new snap context if we | |
422 | // own the exclusive lock | |
423 | std::vector<snapid_t> snaps; | |
424 | snaps.push_back(m_snap_id); | |
425 | snaps.insert(snaps.end(), image_ctx.snapc.snaps.begin(), | |
426 | image_ctx.snapc.snaps.end()); | |
427 | ||
428 | image_ctx.snapc.seq = m_snap_id; | |
429 | image_ctx.snapc.snaps.swap(snaps); | |
430 | image_ctx.data_ctx.selfmanaged_snap_set_write_ctx( | |
431 | image_ctx.snapc.seq, image_ctx.snaps); | |
f67539c2 | 432 | image_ctx.rebuild_data_io_context(); |
11fdf7f2 TL |
433 | |
434 | if (!image_ctx.migration_info.empty()) { | |
435 | auto it = image_ctx.migration_info.snap_map.find(CEPH_NOSNAP); | |
436 | ceph_assert(it != image_ctx.migration_info.snap_map.end()); | |
437 | ceph_assert(!it->second.empty()); | |
438 | if (it->second[0] == CEPH_NOSNAP) { | |
439 | ldout(cct, 5) << this << " " << __func__ | |
440 | << ": updating migration snap_map" << dendl; | |
441 | it->second[0] = m_snap_id; | |
442 | } | |
443 | } | |
7c673cae FG |
444 | } |
445 | ||
446 | } // namespace operation | |
447 | } // namespace librbd | |
448 | ||
449 | template class librbd::operation::SnapshotCreateRequest<librbd::ImageCtx>; |