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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 | ||
b32b8144 | 4 | #include <boost/algorithm/string/predicate.hpp> |
11fdf7f2 | 5 | #include "include/ceph_assert.h" |
b32b8144 | 6 | |
7c673cae FG |
7 | #include "librbd/image/RefreshRequest.h" |
8 | #include "common/dout.h" | |
9 | #include "common/errno.h" | |
10 | #include "cls/lock/cls_lock_client.h" | |
11 | #include "cls/rbd/cls_rbd_client.h" | |
12 | #include "librbd/ExclusiveLock.h" | |
13 | #include "librbd/ImageCtx.h" | |
11fdf7f2 | 14 | #include "librbd/ImageWatcher.h" |
7c673cae FG |
15 | #include "librbd/Journal.h" |
16 | #include "librbd/ObjectMap.h" | |
17 | #include "librbd/Utils.h" | |
11fdf7f2 | 18 | #include "librbd/deep_copy/Utils.h" |
7c673cae | 19 | #include "librbd/image/RefreshParentRequest.h" |
11fdf7f2 TL |
20 | #include "librbd/io/AioCompletion.h" |
21 | #include "librbd/io/ImageDispatchSpec.h" | |
7c673cae FG |
22 | #include "librbd/io/ImageRequestWQ.h" |
23 | #include "librbd/journal/Policy.h" | |
24 | ||
25 | #define dout_subsys ceph_subsys_rbd | |
26 | #undef dout_prefix | |
27 | #define dout_prefix *_dout << "librbd::image::RefreshRequest: " | |
28 | ||
29 | namespace librbd { | |
30 | namespace image { | |
31 | ||
b32b8144 FG |
32 | namespace { |
33 | ||
34 | const uint64_t MAX_METADATA_ITEMS = 128; | |
35 | ||
36 | } | |
37 | ||
7c673cae FG |
38 | using util::create_rados_callback; |
39 | using util::create_async_context_callback; | |
40 | using util::create_context_callback; | |
41 | ||
42 | template <typename I> | |
43 | RefreshRequest<I>::RefreshRequest(I &image_ctx, bool acquiring_lock, | |
44 | bool skip_open_parent, Context *on_finish) | |
45 | : m_image_ctx(image_ctx), m_acquiring_lock(acquiring_lock), | |
46 | m_skip_open_parent_image(skip_open_parent), | |
47 | m_on_finish(create_async_context_callback(m_image_ctx, on_finish)), | |
48 | m_error_result(0), m_flush_aio(false), m_exclusive_lock(nullptr), | |
49 | m_object_map(nullptr), m_journal(nullptr), m_refresh_parent(nullptr) { | |
11fdf7f2 TL |
50 | m_pool_metadata_io_ctx.dup(image_ctx.md_ctx); |
51 | m_pool_metadata_io_ctx.set_namespace(""); | |
7c673cae FG |
52 | } |
53 | ||
54 | template <typename I> | |
55 | RefreshRequest<I>::~RefreshRequest() { | |
56 | // these require state machine to close | |
11fdf7f2 TL |
57 | ceph_assert(m_exclusive_lock == nullptr); |
58 | ceph_assert(m_object_map == nullptr); | |
59 | ceph_assert(m_journal == nullptr); | |
60 | ceph_assert(m_refresh_parent == nullptr); | |
61 | ceph_assert(!m_blocked_writes); | |
7c673cae FG |
62 | } |
63 | ||
64 | template <typename I> | |
65 | void RefreshRequest<I>::send() { | |
66 | if (m_image_ctx.old_format) { | |
67 | send_v1_read_header(); | |
68 | } else { | |
69 | send_v2_get_mutable_metadata(); | |
70 | } | |
71 | } | |
72 | ||
11fdf7f2 TL |
73 | template <typename I> |
74 | void RefreshRequest<I>::send_get_migration_header() { | |
75 | if (m_image_ctx.ignore_migrating) { | |
76 | if (m_image_ctx.old_format) { | |
77 | send_v1_get_snapshots(); | |
78 | } else { | |
79 | send_v2_get_metadata(); | |
80 | } | |
81 | return; | |
82 | } | |
83 | ||
84 | CephContext *cct = m_image_ctx.cct; | |
85 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
86 | ||
87 | librados::ObjectReadOperation op; | |
88 | cls_client::migration_get_start(&op); | |
89 | ||
90 | using klass = RefreshRequest<I>; | |
91 | librados::AioCompletion *comp = | |
92 | create_rados_callback<klass, &klass::handle_get_migration_header>(this); | |
93 | m_out_bl.clear(); | |
94 | m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
95 | &m_out_bl); | |
96 | comp->release(); | |
97 | } | |
98 | ||
99 | template <typename I> | |
100 | Context *RefreshRequest<I>::handle_get_migration_header(int *result) { | |
101 | CephContext *cct = m_image_ctx.cct; | |
102 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
103 | ||
104 | if (*result == 0) { | |
105 | auto it = m_out_bl.cbegin(); | |
106 | *result = cls_client::migration_get_finish(&it, &m_migration_spec); | |
107 | } else if (*result == -ENOENT) { | |
108 | ldout(cct, 5) << this << " " << __func__ << ": no migration header found" | |
109 | << ", retrying" << dendl; | |
110 | send(); | |
111 | return nullptr; | |
112 | } | |
113 | ||
114 | if (*result < 0) { | |
115 | lderr(cct) << "failed to retrieve migration header: " | |
116 | << cpp_strerror(*result) << dendl; | |
117 | return m_on_finish; | |
118 | } | |
119 | ||
120 | switch(m_migration_spec.header_type) { | |
121 | case cls::rbd::MIGRATION_HEADER_TYPE_SRC: | |
122 | if (!m_image_ctx.read_only) { | |
123 | lderr(cct) << "image being migrated" << dendl; | |
124 | *result = -EROFS; | |
125 | return m_on_finish; | |
126 | } | |
127 | ldout(cct, 1) << this << " " << __func__ << ": migrating to: " | |
128 | << m_migration_spec << dendl; | |
129 | break; | |
130 | case cls::rbd::MIGRATION_HEADER_TYPE_DST: | |
131 | ldout(cct, 1) << this << " " << __func__ << ": migrating from: " | |
132 | << m_migration_spec << dendl; | |
133 | if (m_migration_spec.state != cls::rbd::MIGRATION_STATE_PREPARED && | |
134 | m_migration_spec.state != cls::rbd::MIGRATION_STATE_EXECUTING && | |
135 | m_migration_spec.state != cls::rbd::MIGRATION_STATE_EXECUTED) { | |
136 | ldout(cct, 5) << this << " " << __func__ << ": current migration state: " | |
137 | << m_migration_spec.state << ", retrying" << dendl; | |
138 | send(); | |
139 | return nullptr; | |
140 | } | |
141 | break; | |
142 | default: | |
143 | ldout(cct, 1) << this << " " << __func__ << ": migration type " | |
144 | << m_migration_spec.header_type << dendl; | |
145 | *result = -EBADMSG; | |
146 | return m_on_finish; | |
147 | } | |
148 | ||
149 | if (m_image_ctx.old_format) { | |
150 | send_v1_get_snapshots(); | |
151 | } else { | |
152 | send_v2_get_metadata(); | |
153 | } | |
154 | return nullptr; | |
155 | } | |
156 | ||
7c673cae FG |
157 | template <typename I> |
158 | void RefreshRequest<I>::send_v1_read_header() { | |
159 | CephContext *cct = m_image_ctx.cct; | |
160 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
161 | ||
162 | librados::ObjectReadOperation op; | |
163 | op.read(0, 0, nullptr, nullptr); | |
164 | ||
165 | using klass = RefreshRequest<I>; | |
166 | librados::AioCompletion *comp = create_rados_callback< | |
167 | klass, &klass::handle_v1_read_header>(this); | |
168 | m_out_bl.clear(); | |
169 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
170 | &m_out_bl); | |
11fdf7f2 | 171 | ceph_assert(r == 0); |
7c673cae FG |
172 | comp->release(); |
173 | } | |
174 | ||
175 | template <typename I> | |
176 | Context *RefreshRequest<I>::handle_v1_read_header(int *result) { | |
177 | CephContext *cct = m_image_ctx.cct; | |
178 | ldout(cct, 10) << this << " " << __func__ << ": " << "r=" << *result << dendl; | |
179 | ||
180 | rbd_obj_header_ondisk v1_header; | |
11fdf7f2 | 181 | bool migrating = false; |
7c673cae FG |
182 | if (*result < 0) { |
183 | return m_on_finish; | |
184 | } else if (m_out_bl.length() < sizeof(v1_header)) { | |
185 | lderr(cct) << "v1 header too small" << dendl; | |
186 | *result = -EIO; | |
187 | return m_on_finish; | |
188 | } else if (memcmp(RBD_HEADER_TEXT, m_out_bl.c_str(), | |
189 | sizeof(RBD_HEADER_TEXT)) != 0) { | |
11fdf7f2 TL |
190 | if (memcmp(RBD_MIGRATE_HEADER_TEXT, m_out_bl.c_str(), |
191 | sizeof(RBD_MIGRATE_HEADER_TEXT)) == 0) { | |
192 | ldout(cct, 1) << this << " " << __func__ << ": migration v1 header detected" | |
193 | << dendl; | |
194 | migrating = true; | |
195 | } else { | |
196 | lderr(cct) << "unrecognized v1 header" << dendl; | |
197 | *result = -ENXIO; | |
198 | return m_on_finish; | |
199 | } | |
7c673cae FG |
200 | } |
201 | ||
202 | memcpy(&v1_header, m_out_bl.c_str(), sizeof(v1_header)); | |
203 | m_order = v1_header.options.order; | |
204 | m_size = v1_header.image_size; | |
205 | m_object_prefix = v1_header.block_name; | |
11fdf7f2 TL |
206 | if (migrating) { |
207 | send_get_migration_header(); | |
208 | } else { | |
209 | send_v1_get_snapshots(); | |
210 | } | |
7c673cae FG |
211 | return nullptr; |
212 | } | |
213 | ||
214 | template <typename I> | |
215 | void RefreshRequest<I>::send_v1_get_snapshots() { | |
216 | CephContext *cct = m_image_ctx.cct; | |
217 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
218 | ||
219 | librados::ObjectReadOperation op; | |
220 | cls_client::old_snapshot_list_start(&op); | |
221 | ||
222 | using klass = RefreshRequest<I>; | |
223 | librados::AioCompletion *comp = create_rados_callback< | |
224 | klass, &klass::handle_v1_get_snapshots>(this); | |
225 | m_out_bl.clear(); | |
226 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
227 | &m_out_bl); | |
11fdf7f2 | 228 | ceph_assert(r == 0); |
7c673cae FG |
229 | comp->release(); |
230 | } | |
231 | ||
232 | template <typename I> | |
233 | Context *RefreshRequest<I>::handle_v1_get_snapshots(int *result) { | |
234 | CephContext *cct = m_image_ctx.cct; | |
235 | ldout(cct, 10) << this << " " << __func__ << ": " << "r=" << *result << dendl; | |
236 | ||
11fdf7f2 TL |
237 | std::vector<std::string> snap_names; |
238 | std::vector<uint64_t> snap_sizes; | |
7c673cae | 239 | if (*result == 0) { |
11fdf7f2 TL |
240 | auto it = m_out_bl.cbegin(); |
241 | *result = cls_client::old_snapshot_list_finish(&it, &snap_names, | |
242 | &snap_sizes, &m_snapc); | |
7c673cae FG |
243 | } |
244 | ||
245 | if (*result < 0) { | |
246 | lderr(cct) << "failed to retrieve v1 snapshots: " << cpp_strerror(*result) | |
247 | << dendl; | |
248 | return m_on_finish; | |
249 | } | |
250 | ||
251 | if (!m_snapc.is_valid()) { | |
252 | lderr(cct) << "v1 image snap context is invalid" << dendl; | |
253 | *result = -EIO; | |
254 | return m_on_finish; | |
255 | } | |
256 | ||
11fdf7f2 TL |
257 | m_snap_infos.clear(); |
258 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { | |
259 | m_snap_infos.push_back({m_snapc.snaps[i], | |
260 | {cls::rbd::UserSnapshotNamespace{}}, | |
261 | snap_names[i], snap_sizes[i], {}, 0}); | |
262 | } | |
7c673cae FG |
263 | |
264 | send_v1_get_locks(); | |
265 | return nullptr; | |
266 | } | |
267 | ||
268 | template <typename I> | |
269 | void RefreshRequest<I>::send_v1_get_locks() { | |
270 | CephContext *cct = m_image_ctx.cct; | |
271 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
272 | ||
273 | librados::ObjectReadOperation op; | |
274 | rados::cls::lock::get_lock_info_start(&op, RBD_LOCK_NAME); | |
275 | ||
276 | using klass = RefreshRequest<I>; | |
277 | librados::AioCompletion *comp = create_rados_callback< | |
278 | klass, &klass::handle_v1_get_locks>(this); | |
279 | m_out_bl.clear(); | |
280 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
281 | &m_out_bl); | |
11fdf7f2 | 282 | ceph_assert(r == 0); |
7c673cae FG |
283 | comp->release(); |
284 | } | |
285 | ||
286 | template <typename I> | |
287 | Context *RefreshRequest<I>::handle_v1_get_locks(int *result) { | |
288 | CephContext *cct = m_image_ctx.cct; | |
289 | ldout(cct, 10) << this << " " << __func__ << ": " | |
290 | << "r=" << *result << dendl; | |
291 | ||
11fdf7f2 TL |
292 | if (*result == 0) { |
293 | auto it = m_out_bl.cbegin(); | |
7c673cae FG |
294 | ClsLockType lock_type; |
295 | *result = rados::cls::lock::get_lock_info_finish(&it, &m_lockers, | |
296 | &lock_type, &m_lock_tag); | |
297 | if (*result == 0) { | |
298 | m_exclusive_locked = (lock_type == LOCK_EXCLUSIVE); | |
299 | } | |
300 | } | |
301 | if (*result < 0) { | |
302 | lderr(cct) << "failed to retrieve locks: " << cpp_strerror(*result) | |
303 | << dendl; | |
304 | return m_on_finish; | |
305 | } | |
306 | ||
307 | send_v1_apply(); | |
308 | return nullptr; | |
309 | } | |
310 | ||
311 | template <typename I> | |
312 | void RefreshRequest<I>::send_v1_apply() { | |
313 | CephContext *cct = m_image_ctx.cct; | |
314 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
315 | ||
316 | // ensure we are not in a rados callback when applying updates | |
317 | using klass = RefreshRequest<I>; | |
318 | Context *ctx = create_context_callback< | |
319 | klass, &klass::handle_v1_apply>(this); | |
320 | m_image_ctx.op_work_queue->queue(ctx, 0); | |
321 | } | |
322 | ||
323 | template <typename I> | |
324 | Context *RefreshRequest<I>::handle_v1_apply(int *result) { | |
325 | CephContext *cct = m_image_ctx.cct; | |
326 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
327 | ||
328 | apply(); | |
329 | return send_flush_aio(); | |
330 | } | |
331 | ||
332 | template <typename I> | |
333 | void RefreshRequest<I>::send_v2_get_mutable_metadata() { | |
334 | CephContext *cct = m_image_ctx.cct; | |
335 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
336 | ||
337 | uint64_t snap_id; | |
338 | { | |
339 | RWLock::RLocker snap_locker(m_image_ctx.snap_lock); | |
340 | snap_id = m_image_ctx.snap_id; | |
341 | } | |
342 | ||
343 | bool read_only = m_image_ctx.read_only || snap_id != CEPH_NOSNAP; | |
344 | librados::ObjectReadOperation op; | |
11fdf7f2 TL |
345 | cls_client::get_size_start(&op, CEPH_NOSNAP); |
346 | cls_client::get_features_start(&op, read_only); | |
347 | cls_client::get_flags_start(&op, CEPH_NOSNAP); | |
348 | cls_client::get_snapcontext_start(&op); | |
349 | rados::cls::lock::get_lock_info_start(&op, RBD_LOCK_NAME); | |
7c673cae FG |
350 | |
351 | using klass = RefreshRequest<I>; | |
352 | librados::AioCompletion *comp = create_rados_callback< | |
353 | klass, &klass::handle_v2_get_mutable_metadata>(this); | |
354 | m_out_bl.clear(); | |
355 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
356 | &m_out_bl); | |
11fdf7f2 | 357 | ceph_assert(r == 0); |
7c673cae FG |
358 | comp->release(); |
359 | } | |
360 | ||
361 | template <typename I> | |
362 | Context *RefreshRequest<I>::handle_v2_get_mutable_metadata(int *result) { | |
363 | CephContext *cct = m_image_ctx.cct; | |
364 | ldout(cct, 10) << this << " " << __func__ << ": " | |
365 | << "r=" << *result << dendl; | |
366 | ||
11fdf7f2 TL |
367 | auto it = m_out_bl.cbegin(); |
368 | if (*result >= 0) { | |
369 | uint8_t order; | |
370 | *result = cls_client::get_size_finish(&it, &m_size, &order); | |
371 | } | |
372 | ||
373 | if (*result >= 0) { | |
374 | *result = cls_client::get_features_finish(&it, &m_features, | |
375 | &m_incompatible_features); | |
376 | } | |
377 | ||
378 | if (*result >= 0) { | |
379 | *result = cls_client::get_flags_finish(&it, &m_flags); | |
380 | } | |
381 | ||
382 | if (*result >= 0) { | |
383 | *result = cls_client::get_snapcontext_finish(&it, &m_snapc); | |
384 | } | |
385 | ||
386 | if (*result >= 0) { | |
387 | ClsLockType lock_type = LOCK_NONE; | |
388 | *result = rados::cls::lock::get_lock_info_finish(&it, &m_lockers, | |
389 | &lock_type, &m_lock_tag); | |
390 | if (*result == 0) { | |
391 | m_exclusive_locked = (lock_type == LOCK_EXCLUSIVE); | |
392 | } | |
7c673cae | 393 | } |
11fdf7f2 | 394 | |
7c673cae FG |
395 | if (*result < 0) { |
396 | lderr(cct) << "failed to retrieve mutable metadata: " | |
397 | << cpp_strerror(*result) << dendl; | |
398 | return m_on_finish; | |
399 | } | |
400 | ||
401 | uint64_t unsupported = m_incompatible_features & ~RBD_FEATURES_ALL; | |
402 | if (unsupported != 0ULL) { | |
403 | lderr(cct) << "Image uses unsupported features: " << unsupported << dendl; | |
404 | *result = -ENOSYS; | |
405 | return m_on_finish; | |
406 | } | |
407 | ||
408 | if (!m_snapc.is_valid()) { | |
409 | lderr(cct) << "image snap context is invalid!" << dendl; | |
410 | *result = -EIO; | |
411 | return m_on_finish; | |
412 | } | |
413 | ||
414 | if (m_acquiring_lock && (m_features & RBD_FEATURE_EXCLUSIVE_LOCK) == 0) { | |
415 | ldout(cct, 5) << "ignoring dynamically disabled exclusive lock" << dendl; | |
416 | m_features |= RBD_FEATURE_EXCLUSIVE_LOCK; | |
417 | m_incomplete_update = true; | |
418 | } | |
419 | ||
11fdf7f2 TL |
420 | send_v2_get_parent(); |
421 | return nullptr; | |
422 | } | |
423 | ||
424 | template <typename I> | |
425 | void RefreshRequest<I>::send_v2_get_parent() { | |
426 | // NOTE: remove support when Mimic is EOLed | |
427 | CephContext *cct = m_image_ctx.cct; | |
428 | ldout(cct, 10) << this << " " << __func__ << ": legacy=" << m_legacy_parent | |
429 | << dendl; | |
430 | ||
431 | librados::ObjectReadOperation op; | |
432 | if (!m_legacy_parent) { | |
433 | cls_client::parent_get_start(&op); | |
434 | cls_client::parent_overlap_get_start(&op, CEPH_NOSNAP); | |
435 | } else { | |
436 | cls_client::get_parent_start(&op, CEPH_NOSNAP); | |
437 | } | |
438 | ||
439 | auto aio_comp = create_rados_callback< | |
440 | RefreshRequest<I>, &RefreshRequest<I>::handle_v2_get_parent>(this); | |
441 | m_out_bl.clear(); | |
442 | m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, aio_comp, &op, | |
443 | &m_out_bl); | |
444 | aio_comp->release(); | |
445 | } | |
446 | ||
447 | template <typename I> | |
448 | Context *RefreshRequest<I>::handle_v2_get_parent(int *result) { | |
449 | // NOTE: remove support when Mimic is EOLed | |
450 | CephContext *cct = m_image_ctx.cct; | |
451 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
452 | ||
453 | auto it = m_out_bl.cbegin(); | |
454 | if (!m_legacy_parent) { | |
455 | if (*result == 0) { | |
456 | *result = cls_client::parent_get_finish(&it, &m_parent_md.spec); | |
457 | } | |
458 | ||
459 | std::optional<uint64_t> parent_overlap; | |
460 | if (*result == 0) { | |
461 | *result = cls_client::parent_overlap_get_finish(&it, &parent_overlap); | |
462 | } | |
463 | ||
464 | if (*result == 0 && parent_overlap) { | |
465 | m_parent_md.overlap = *parent_overlap; | |
466 | m_head_parent_overlap = true; | |
467 | } | |
468 | } else if (*result == 0) { | |
469 | *result = cls_client::get_parent_finish(&it, &m_parent_md.spec, | |
470 | &m_parent_md.overlap); | |
471 | m_head_parent_overlap = true; | |
472 | } | |
473 | ||
474 | if (*result == -EOPNOTSUPP && !m_legacy_parent) { | |
475 | ldout(cct, 10) << "retrying using legacy parent method" << dendl; | |
476 | m_legacy_parent = true; | |
477 | send_v2_get_parent(); | |
478 | return nullptr; | |
479 | } if (*result < 0) { | |
480 | lderr(cct) << "failed to retrieve parent: " << cpp_strerror(*result) | |
481 | << dendl; | |
482 | return m_on_finish; | |
483 | } | |
484 | ||
485 | if ((m_features & RBD_FEATURE_MIGRATING) != 0) { | |
486 | ldout(cct, 1) << "migrating feature set" << dendl; | |
487 | send_get_migration_header(); | |
488 | return nullptr; | |
489 | } | |
490 | ||
b32b8144 FG |
491 | send_v2_get_metadata(); |
492 | return nullptr; | |
493 | } | |
494 | ||
495 | template <typename I> | |
496 | void RefreshRequest<I>::send_v2_get_metadata() { | |
497 | CephContext *cct = m_image_ctx.cct; | |
498 | ldout(cct, 10) << this << " " << __func__ << ": " | |
499 | << "start_key=" << m_last_metadata_key << dendl; | |
500 | ||
501 | librados::ObjectReadOperation op; | |
502 | cls_client::metadata_list_start(&op, m_last_metadata_key, MAX_METADATA_ITEMS); | |
503 | ||
504 | using klass = RefreshRequest<I>; | |
505 | librados::AioCompletion *comp = | |
506 | create_rados_callback<klass, &klass::handle_v2_get_metadata>(this); | |
507 | m_out_bl.clear(); | |
508 | m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
509 | &m_out_bl); | |
510 | comp->release(); | |
511 | } | |
512 | ||
513 | template <typename I> | |
514 | Context *RefreshRequest<I>::handle_v2_get_metadata(int *result) { | |
515 | CephContext *cct = m_image_ctx.cct; | |
516 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
517 | ||
518 | std::map<std::string, bufferlist> metadata; | |
519 | if (*result == 0) { | |
11fdf7f2 | 520 | auto it = m_out_bl.cbegin(); |
b32b8144 FG |
521 | *result = cls_client::metadata_list_finish(&it, &metadata); |
522 | } | |
523 | ||
11fdf7f2 | 524 | if (*result < 0) { |
b32b8144 FG |
525 | lderr(cct) << "failed to retrieve metadata: " << cpp_strerror(*result) |
526 | << dendl; | |
527 | return m_on_finish; | |
528 | } | |
529 | ||
530 | if (!metadata.empty()) { | |
531 | m_metadata.insert(metadata.begin(), metadata.end()); | |
532 | m_last_metadata_key = metadata.rbegin()->first; | |
533 | if (boost::starts_with(m_last_metadata_key, | |
534 | ImageCtx::METADATA_CONF_PREFIX)) { | |
535 | send_v2_get_metadata(); | |
536 | return nullptr; | |
537 | } | |
538 | } | |
539 | ||
11fdf7f2 TL |
540 | m_last_metadata_key.clear(); |
541 | send_v2_get_pool_metadata(); | |
7c673cae FG |
542 | return nullptr; |
543 | } | |
544 | ||
545 | template <typename I> | |
11fdf7f2 | 546 | void RefreshRequest<I>::send_v2_get_pool_metadata() { |
7c673cae | 547 | CephContext *cct = m_image_ctx.cct; |
11fdf7f2 TL |
548 | ldout(cct, 10) << this << " " << __func__ << ": " |
549 | << "start_key=" << m_last_metadata_key << dendl; | |
7c673cae FG |
550 | |
551 | librados::ObjectReadOperation op; | |
11fdf7f2 | 552 | cls_client::metadata_list_start(&op, m_last_metadata_key, MAX_METADATA_ITEMS); |
7c673cae FG |
553 | |
554 | using klass = RefreshRequest<I>; | |
11fdf7f2 TL |
555 | librados::AioCompletion *comp = |
556 | create_rados_callback<klass, &klass::handle_v2_get_pool_metadata>(this); | |
7c673cae | 557 | m_out_bl.clear(); |
11fdf7f2 | 558 | m_pool_metadata_io_ctx.aio_operate(RBD_INFO, comp, &op, &m_out_bl); |
7c673cae FG |
559 | comp->release(); |
560 | } | |
561 | ||
562 | template <typename I> | |
11fdf7f2 | 563 | Context *RefreshRequest<I>::handle_v2_get_pool_metadata(int *result) { |
7c673cae | 564 | CephContext *cct = m_image_ctx.cct; |
11fdf7f2 | 565 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; |
7c673cae | 566 | |
11fdf7f2 | 567 | std::map<std::string, bufferlist> metadata; |
7c673cae | 568 | if (*result == 0) { |
11fdf7f2 TL |
569 | auto it = m_out_bl.cbegin(); |
570 | *result = cls_client::metadata_list_finish(&it, &metadata); | |
571 | } | |
7c673cae | 572 | |
11fdf7f2 TL |
573 | if (*result == -EOPNOTSUPP || *result == -ENOENT) { |
574 | ldout(cct, 10) << "pool metadata not supported by OSD" << dendl; | |
7c673cae | 575 | } else if (*result < 0) { |
11fdf7f2 | 576 | lderr(cct) << "failed to retrieve pool metadata: " << cpp_strerror(*result) |
7c673cae FG |
577 | << dendl; |
578 | return m_on_finish; | |
579 | } | |
580 | ||
11fdf7f2 TL |
581 | if (!metadata.empty()) { |
582 | m_metadata.insert(metadata.begin(), metadata.end()); | |
583 | m_last_metadata_key = metadata.rbegin()->first; | |
584 | if (boost::starts_with(m_last_metadata_key, | |
585 | ImageCtx::METADATA_CONF_PREFIX)) { | |
586 | send_v2_get_pool_metadata(); | |
587 | return nullptr; | |
588 | } | |
589 | } | |
590 | ||
591 | bool thread_safe = m_image_ctx.image_watcher->is_unregistered(); | |
592 | m_image_ctx.apply_metadata(m_metadata, thread_safe); | |
593 | ||
594 | send_v2_get_op_features(); | |
7c673cae FG |
595 | return nullptr; |
596 | } | |
597 | ||
598 | template <typename I> | |
11fdf7f2 TL |
599 | void RefreshRequest<I>::send_v2_get_op_features() { |
600 | if ((m_features & RBD_FEATURE_OPERATIONS) == 0LL) { | |
601 | send_v2_get_group(); | |
602 | return; | |
603 | } | |
604 | ||
7c673cae FG |
605 | CephContext *cct = m_image_ctx.cct; |
606 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
607 | ||
608 | librados::ObjectReadOperation op; | |
11fdf7f2 | 609 | cls_client::op_features_get_start(&op); |
7c673cae | 610 | |
7c673cae | 611 | librados::AioCompletion *comp = create_rados_callback< |
11fdf7f2 | 612 | RefreshRequest<I>, &RefreshRequest<I>::handle_v2_get_op_features>(this); |
7c673cae FG |
613 | m_out_bl.clear(); |
614 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
615 | &m_out_bl); | |
11fdf7f2 | 616 | ceph_assert(r == 0); |
7c673cae FG |
617 | comp->release(); |
618 | } | |
619 | ||
620 | template <typename I> | |
11fdf7f2 | 621 | Context *RefreshRequest<I>::handle_v2_get_op_features(int *result) { |
7c673cae FG |
622 | CephContext *cct = m_image_ctx.cct; |
623 | ldout(cct, 10) << this << " " << __func__ << ": " | |
624 | << "r=" << *result << dendl; | |
625 | ||
11fdf7f2 TL |
626 | // -EOPNOTSUPP handler not required since feature bit implies OSD |
627 | // supports the method | |
7c673cae | 628 | if (*result == 0) { |
11fdf7f2 TL |
629 | auto it = m_out_bl.cbegin(); |
630 | cls_client::op_features_get_finish(&it, &m_op_features); | |
7c673cae | 631 | } else if (*result < 0) { |
11fdf7f2 | 632 | lderr(cct) << "failed to retrieve op features: " << cpp_strerror(*result) |
7c673cae FG |
633 | << dendl; |
634 | return m_on_finish; | |
635 | } | |
636 | ||
11fdf7f2 | 637 | send_v2_get_group(); |
7c673cae FG |
638 | return nullptr; |
639 | } | |
640 | ||
641 | template <typename I> | |
11fdf7f2 | 642 | void RefreshRequest<I>::send_v2_get_group() { |
7c673cae FG |
643 | CephContext *cct = m_image_ctx.cct; |
644 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
645 | ||
646 | librados::ObjectReadOperation op; | |
11fdf7f2 | 647 | cls_client::image_group_get_start(&op); |
7c673cae FG |
648 | |
649 | using klass = RefreshRequest<I>; | |
650 | librados::AioCompletion *comp = create_rados_callback< | |
11fdf7f2 | 651 | klass, &klass::handle_v2_get_group>(this); |
7c673cae FG |
652 | m_out_bl.clear(); |
653 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
654 | &m_out_bl); | |
11fdf7f2 | 655 | ceph_assert(r == 0); |
7c673cae FG |
656 | comp->release(); |
657 | } | |
658 | ||
659 | template <typename I> | |
11fdf7f2 | 660 | Context *RefreshRequest<I>::handle_v2_get_group(int *result) { |
7c673cae FG |
661 | CephContext *cct = m_image_ctx.cct; |
662 | ldout(cct, 10) << this << " " << __func__ << ": " | |
663 | << "r=" << *result << dendl; | |
664 | ||
665 | if (*result == 0) { | |
11fdf7f2 TL |
666 | auto it = m_out_bl.cbegin(); |
667 | cls_client::image_group_get_finish(&it, &m_group_spec); | |
7c673cae | 668 | } |
11fdf7f2 TL |
669 | if (*result < 0 && *result != -EOPNOTSUPP) { |
670 | lderr(cct) << "failed to retrieve group: " << cpp_strerror(*result) | |
7c673cae FG |
671 | << dendl; |
672 | return m_on_finish; | |
673 | } | |
674 | ||
11fdf7f2 | 675 | send_v2_get_snapshots(); |
7c673cae FG |
676 | return nullptr; |
677 | } | |
678 | ||
679 | template <typename I> | |
11fdf7f2 TL |
680 | void RefreshRequest<I>::send_v2_get_snapshots() { |
681 | m_snap_infos.resize(m_snapc.snaps.size()); | |
682 | m_snap_flags.resize(m_snapc.snaps.size()); | |
683 | m_snap_parents.resize(m_snapc.snaps.size()); | |
684 | m_snap_protection.resize(m_snapc.snaps.size()); | |
685 | ||
686 | if (m_snapc.snaps.empty()) { | |
687 | send_v2_refresh_parent(); | |
688 | return; | |
689 | } | |
690 | ||
7c673cae FG |
691 | CephContext *cct = m_image_ctx.cct; |
692 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
693 | ||
694 | librados::ObjectReadOperation op; | |
11fdf7f2 | 695 | for (auto snap_id : m_snapc.snaps) { |
81eedcae | 696 | if (m_legacy_snapshot != LEGACY_SNAPSHOT_DISABLED) { |
11fdf7f2 TL |
697 | /// NOTE: remove after Luminous is retired |
698 | cls_client::get_snapshot_name_start(&op, snap_id); | |
699 | cls_client::get_size_start(&op, snap_id); | |
81eedcae TL |
700 | if (m_legacy_snapshot != LEGACY_SNAPSHOT_ENABLED_NO_TIMESTAMP) { |
701 | cls_client::get_snapshot_timestamp_start(&op, snap_id); | |
702 | } | |
11fdf7f2 TL |
703 | } else { |
704 | cls_client::snapshot_get_start(&op, snap_id); | |
705 | } | |
706 | ||
707 | if (m_legacy_parent) { | |
708 | cls_client::get_parent_start(&op, snap_id); | |
709 | } else { | |
710 | cls_client::parent_overlap_get_start(&op, snap_id); | |
711 | } | |
712 | ||
713 | cls_client::get_flags_start(&op, snap_id); | |
714 | cls_client::get_protection_status_start(&op, snap_id); | |
715 | } | |
7c673cae FG |
716 | |
717 | using klass = RefreshRequest<I>; | |
718 | librados::AioCompletion *comp = create_rados_callback< | |
11fdf7f2 | 719 | klass, &klass::handle_v2_get_snapshots>(this); |
7c673cae FG |
720 | m_out_bl.clear(); |
721 | int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, comp, &op, | |
11fdf7f2 TL |
722 | &m_out_bl); |
723 | ceph_assert(r == 0); | |
7c673cae FG |
724 | comp->release(); |
725 | } | |
726 | ||
727 | template <typename I> | |
11fdf7f2 | 728 | Context *RefreshRequest<I>::handle_v2_get_snapshots(int *result) { |
7c673cae FG |
729 | CephContext *cct = m_image_ctx.cct; |
730 | ldout(cct, 10) << this << " " << __func__ << ": " << "r=" << *result << dendl; | |
731 | ||
11fdf7f2 TL |
732 | auto it = m_out_bl.cbegin(); |
733 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { | |
81eedcae | 734 | if (m_legacy_snapshot != LEGACY_SNAPSHOT_DISABLED) { |
11fdf7f2 TL |
735 | /// NOTE: remove after Luminous is retired |
736 | std::string snap_name; | |
737 | if (*result >= 0) { | |
738 | *result = cls_client::get_snapshot_name_finish(&it, &snap_name); | |
739 | } | |
7c673cae | 740 | |
11fdf7f2 TL |
741 | uint64_t snap_size; |
742 | if (*result >= 0) { | |
743 | uint8_t order; | |
744 | *result = cls_client::get_size_finish(&it, &snap_size, &order); | |
745 | } | |
7c673cae | 746 | |
11fdf7f2 | 747 | utime_t snap_timestamp; |
81eedcae TL |
748 | if (*result >= 0 && |
749 | m_legacy_snapshot != LEGACY_SNAPSHOT_ENABLED_NO_TIMESTAMP) { | |
750 | /// NOTE: remove after Jewel is retired | |
11fdf7f2 TL |
751 | *result = cls_client::get_snapshot_timestamp_finish(&it, |
752 | &snap_timestamp); | |
753 | } | |
7c673cae | 754 | |
11fdf7f2 TL |
755 | if (*result >= 0) { |
756 | m_snap_infos[i] = {m_snapc.snaps[i], | |
757 | {cls::rbd::UserSnapshotNamespace{}}, | |
758 | snap_name, snap_size, snap_timestamp, 0}; | |
759 | } | |
760 | } else if (*result >= 0) { | |
761 | *result = cls_client::snapshot_get_finish(&it, &m_snap_infos[i]); | |
762 | } | |
7c673cae | 763 | |
11fdf7f2 TL |
764 | if (*result == 0) { |
765 | if (m_legacy_parent) { | |
766 | *result = cls_client::get_parent_finish(&it, &m_snap_parents[i].spec, | |
767 | &m_snap_parents[i].overlap); | |
768 | } else { | |
769 | std::optional<uint64_t> parent_overlap; | |
770 | *result = cls_client::parent_overlap_get_finish(&it, &parent_overlap); | |
771 | if (*result == 0 && parent_overlap && m_parent_md.spec.pool_id > -1) { | |
772 | m_snap_parents[i].spec = m_parent_md.spec; | |
773 | m_snap_parents[i].overlap = *parent_overlap; | |
774 | } | |
775 | } | |
776 | } | |
7c673cae | 777 | |
11fdf7f2 TL |
778 | if (*result >= 0) { |
779 | *result = cls_client::get_flags_finish(&it, &m_snap_flags[i]); | |
780 | } | |
7c673cae | 781 | |
11fdf7f2 TL |
782 | if (*result >= 0) { |
783 | *result = cls_client::get_protection_status_finish( | |
784 | &it, &m_snap_protection[i]); | |
785 | } | |
786 | ||
787 | if (*result < 0) { | |
788 | break; | |
789 | } | |
7c673cae | 790 | } |
11fdf7f2 | 791 | |
7c673cae FG |
792 | if (*result == -ENOENT) { |
793 | ldout(cct, 10) << "out-of-sync snapshot state detected" << dendl; | |
794 | send_v2_get_mutable_metadata(); | |
795 | return nullptr; | |
81eedcae TL |
796 | } else if (m_legacy_snapshot == LEGACY_SNAPSHOT_DISABLED && |
797 | *result == -EOPNOTSUPP) { | |
11fdf7f2 | 798 | ldout(cct, 10) << "retrying using legacy snapshot methods" << dendl; |
81eedcae TL |
799 | m_legacy_snapshot = LEGACY_SNAPSHOT_ENABLED; |
800 | send_v2_get_snapshots(); | |
801 | return nullptr; | |
802 | } else if (m_legacy_snapshot == LEGACY_SNAPSHOT_ENABLED && | |
803 | *result == -EOPNOTSUPP) { | |
804 | ldout(cct, 10) << "retrying using legacy snapshot methods (jewel)" << dendl; | |
805 | m_legacy_snapshot = LEGACY_SNAPSHOT_ENABLED_NO_TIMESTAMP; | |
11fdf7f2 TL |
806 | send_v2_get_snapshots(); |
807 | return nullptr; | |
7c673cae FG |
808 | } else if (*result < 0) { |
809 | lderr(cct) << "failed to retrieve snapshots: " << cpp_strerror(*result) | |
810 | << dendl; | |
811 | return m_on_finish; | |
812 | } | |
813 | ||
814 | send_v2_refresh_parent(); | |
815 | return nullptr; | |
816 | } | |
817 | ||
818 | template <typename I> | |
819 | void RefreshRequest<I>::send_v2_refresh_parent() { | |
820 | { | |
821 | RWLock::RLocker snap_locker(m_image_ctx.snap_lock); | |
822 | RWLock::RLocker parent_locker(m_image_ctx.parent_lock); | |
823 | ||
11fdf7f2 TL |
824 | ParentImageInfo parent_md; |
825 | MigrationInfo migration_info; | |
826 | int r = get_parent_info(m_image_ctx.snap_id, &parent_md, &migration_info); | |
7c673cae | 827 | if (!m_skip_open_parent_image && (r < 0 || |
11fdf7f2 TL |
828 | RefreshParentRequest<I>::is_refresh_required(m_image_ctx, parent_md, |
829 | migration_info))) { | |
7c673cae FG |
830 | CephContext *cct = m_image_ctx.cct; |
831 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
832 | ||
833 | using klass = RefreshRequest<I>; | |
834 | Context *ctx = create_context_callback< | |
835 | klass, &klass::handle_v2_refresh_parent>(this); | |
836 | m_refresh_parent = RefreshParentRequest<I>::create( | |
11fdf7f2 | 837 | m_image_ctx, parent_md, migration_info, ctx); |
7c673cae FG |
838 | } |
839 | } | |
840 | ||
841 | if (m_refresh_parent != nullptr) { | |
842 | m_refresh_parent->send(); | |
843 | } else { | |
844 | send_v2_init_exclusive_lock(); | |
845 | } | |
846 | } | |
847 | ||
848 | template <typename I> | |
849 | Context *RefreshRequest<I>::handle_v2_refresh_parent(int *result) { | |
850 | CephContext *cct = m_image_ctx.cct; | |
851 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
852 | ||
853 | if (*result < 0) { | |
854 | lderr(cct) << "failed to refresh parent image: " << cpp_strerror(*result) | |
855 | << dendl; | |
856 | save_result(result); | |
857 | send_v2_apply(); | |
858 | return nullptr; | |
859 | } | |
860 | ||
861 | send_v2_init_exclusive_lock(); | |
862 | return nullptr; | |
863 | } | |
864 | ||
865 | template <typename I> | |
866 | void RefreshRequest<I>::send_v2_init_exclusive_lock() { | |
867 | if ((m_features & RBD_FEATURE_EXCLUSIVE_LOCK) == 0 || | |
868 | m_image_ctx.read_only || !m_image_ctx.snap_name.empty() || | |
869 | m_image_ctx.exclusive_lock != nullptr) { | |
870 | send_v2_open_object_map(); | |
871 | return; | |
872 | } | |
873 | ||
874 | // implies exclusive lock dynamically enabled or image open in-progress | |
875 | CephContext *cct = m_image_ctx.cct; | |
876 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
877 | ||
878 | // TODO need safe shut down | |
879 | m_exclusive_lock = m_image_ctx.create_exclusive_lock(); | |
880 | ||
881 | using klass = RefreshRequest<I>; | |
882 | Context *ctx = create_context_callback< | |
883 | klass, &klass::handle_v2_init_exclusive_lock>(this); | |
884 | ||
885 | RWLock::RLocker owner_locker(m_image_ctx.owner_lock); | |
886 | m_exclusive_lock->init(m_features, ctx); | |
887 | } | |
888 | ||
889 | template <typename I> | |
890 | Context *RefreshRequest<I>::handle_v2_init_exclusive_lock(int *result) { | |
891 | CephContext *cct = m_image_ctx.cct; | |
892 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
893 | ||
894 | if (*result < 0) { | |
895 | lderr(cct) << "failed to initialize exclusive lock: " | |
896 | << cpp_strerror(*result) << dendl; | |
897 | save_result(result); | |
898 | } | |
899 | ||
900 | // object map and journal will be opened when exclusive lock is | |
901 | // acquired (if features are enabled) | |
902 | send_v2_apply(); | |
903 | return nullptr; | |
904 | } | |
905 | ||
906 | template <typename I> | |
907 | void RefreshRequest<I>::send_v2_open_journal() { | |
908 | bool journal_disabled = ( | |
909 | (m_features & RBD_FEATURE_JOURNALING) == 0 || | |
910 | m_image_ctx.read_only || | |
911 | !m_image_ctx.snap_name.empty() || | |
912 | m_image_ctx.journal != nullptr || | |
913 | m_image_ctx.exclusive_lock == nullptr || | |
914 | !m_image_ctx.exclusive_lock->is_lock_owner()); | |
915 | bool journal_disabled_by_policy; | |
916 | { | |
917 | RWLock::RLocker snap_locker(m_image_ctx.snap_lock); | |
918 | journal_disabled_by_policy = ( | |
919 | !journal_disabled && | |
920 | m_image_ctx.get_journal_policy()->journal_disabled()); | |
921 | } | |
922 | ||
923 | if (journal_disabled || journal_disabled_by_policy) { | |
924 | // journal dynamically enabled -- doesn't own exclusive lock | |
925 | if ((m_features & RBD_FEATURE_JOURNALING) != 0 && | |
926 | !journal_disabled_by_policy && | |
927 | m_image_ctx.exclusive_lock != nullptr && | |
928 | m_image_ctx.journal == nullptr) { | |
224ce89b WB |
929 | m_image_ctx.io_work_queue->set_require_lock(librbd::io::DIRECTION_BOTH, |
930 | true); | |
7c673cae FG |
931 | } |
932 | send_v2_block_writes(); | |
933 | return; | |
934 | } | |
935 | ||
936 | // implies journal dynamically enabled since ExclusiveLock will init | |
937 | // the journal upon acquiring the lock | |
938 | CephContext *cct = m_image_ctx.cct; | |
939 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
940 | ||
941 | using klass = RefreshRequest<I>; | |
942 | Context *ctx = create_context_callback< | |
943 | klass, &klass::handle_v2_open_journal>(this); | |
944 | ||
945 | // TODO need safe close | |
946 | m_journal = m_image_ctx.create_journal(); | |
947 | m_journal->open(ctx); | |
948 | } | |
949 | ||
950 | template <typename I> | |
951 | Context *RefreshRequest<I>::handle_v2_open_journal(int *result) { | |
952 | CephContext *cct = m_image_ctx.cct; | |
953 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
954 | ||
955 | if (*result < 0) { | |
956 | lderr(cct) << "failed to initialize journal: " << cpp_strerror(*result) | |
957 | << dendl; | |
958 | save_result(result); | |
959 | } | |
960 | ||
961 | send_v2_block_writes(); | |
962 | return nullptr; | |
963 | } | |
964 | ||
965 | template <typename I> | |
966 | void RefreshRequest<I>::send_v2_block_writes() { | |
967 | bool disabled_journaling = false; | |
968 | { | |
969 | RWLock::RLocker snap_locker(m_image_ctx.snap_lock); | |
970 | disabled_journaling = ((m_features & RBD_FEATURE_EXCLUSIVE_LOCK) != 0 && | |
971 | (m_features & RBD_FEATURE_JOURNALING) == 0 && | |
972 | m_image_ctx.journal != nullptr); | |
973 | } | |
974 | ||
975 | if (!disabled_journaling) { | |
976 | send_v2_apply(); | |
977 | return; | |
978 | } | |
979 | ||
980 | CephContext *cct = m_image_ctx.cct; | |
981 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
982 | ||
983 | // we need to block writes temporarily to avoid in-flight journal | |
984 | // writes | |
985 | m_blocked_writes = true; | |
986 | Context *ctx = create_context_callback< | |
987 | RefreshRequest<I>, &RefreshRequest<I>::handle_v2_block_writes>(this); | |
988 | ||
989 | RWLock::RLocker owner_locker(m_image_ctx.owner_lock); | |
990 | m_image_ctx.io_work_queue->block_writes(ctx); | |
991 | } | |
992 | ||
993 | template <typename I> | |
994 | Context *RefreshRequest<I>::handle_v2_block_writes(int *result) { | |
995 | CephContext *cct = m_image_ctx.cct; | |
996 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
997 | ||
998 | if (*result < 0) { | |
999 | lderr(cct) << "failed to block writes: " << cpp_strerror(*result) | |
1000 | << dendl; | |
1001 | save_result(result); | |
1002 | } | |
1003 | send_v2_apply(); | |
1004 | return nullptr; | |
1005 | } | |
1006 | ||
1007 | template <typename I> | |
1008 | void RefreshRequest<I>::send_v2_open_object_map() { | |
1009 | if ((m_features & RBD_FEATURE_OBJECT_MAP) == 0 || | |
1010 | m_image_ctx.object_map != nullptr || | |
1011 | (m_image_ctx.snap_name.empty() && | |
1012 | (m_image_ctx.read_only || | |
1013 | m_image_ctx.exclusive_lock == nullptr || | |
1014 | !m_image_ctx.exclusive_lock->is_lock_owner()))) { | |
1015 | send_v2_open_journal(); | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | // implies object map dynamically enabled or image open in-progress | |
1020 | // since SetSnapRequest loads the object map for a snapshot and | |
1021 | // ExclusiveLock loads the object map for HEAD | |
1022 | CephContext *cct = m_image_ctx.cct; | |
1023 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1024 | ||
1025 | if (m_image_ctx.snap_name.empty()) { | |
1026 | m_object_map = m_image_ctx.create_object_map(CEPH_NOSNAP); | |
1027 | } else { | |
11fdf7f2 TL |
1028 | for (size_t snap_idx = 0; snap_idx < m_snap_infos.size(); ++snap_idx) { |
1029 | if (m_snap_infos[snap_idx].name == m_image_ctx.snap_name) { | |
7c673cae FG |
1030 | m_object_map = m_image_ctx.create_object_map( |
1031 | m_snapc.snaps[snap_idx].val); | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | if (m_object_map == nullptr) { | |
1037 | lderr(cct) << "failed to locate snapshot: " << m_image_ctx.snap_name | |
1038 | << dendl; | |
1039 | send_v2_open_journal(); | |
1040 | return; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | using klass = RefreshRequest<I>; | |
1045 | Context *ctx = create_context_callback< | |
1046 | klass, &klass::handle_v2_open_object_map>(this); | |
1047 | m_object_map->open(ctx); | |
1048 | } | |
1049 | ||
1050 | template <typename I> | |
1051 | Context *RefreshRequest<I>::handle_v2_open_object_map(int *result) { | |
1052 | CephContext *cct = m_image_ctx.cct; | |
1053 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1054 | ||
1055 | if (*result < 0) { | |
1056 | lderr(cct) << "failed to open object map: " << cpp_strerror(*result) | |
1057 | << dendl; | |
1058 | delete m_object_map; | |
1059 | m_object_map = nullptr; | |
11fdf7f2 TL |
1060 | |
1061 | if (*result != -EFBIG) { | |
1062 | save_result(result); | |
1063 | } | |
7c673cae FG |
1064 | } |
1065 | ||
1066 | send_v2_open_journal(); | |
1067 | return nullptr; | |
1068 | } | |
1069 | ||
1070 | template <typename I> | |
1071 | void RefreshRequest<I>::send_v2_apply() { | |
1072 | CephContext *cct = m_image_ctx.cct; | |
1073 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1074 | ||
1075 | // ensure we are not in a rados callback when applying updates | |
1076 | using klass = RefreshRequest<I>; | |
1077 | Context *ctx = create_context_callback< | |
1078 | klass, &klass::handle_v2_apply>(this); | |
1079 | m_image_ctx.op_work_queue->queue(ctx, 0); | |
1080 | } | |
1081 | ||
1082 | template <typename I> | |
1083 | Context *RefreshRequest<I>::handle_v2_apply(int *result) { | |
1084 | CephContext *cct = m_image_ctx.cct; | |
1085 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1086 | ||
1087 | apply(); | |
1088 | ||
1089 | return send_v2_finalize_refresh_parent(); | |
1090 | } | |
1091 | ||
1092 | template <typename I> | |
1093 | Context *RefreshRequest<I>::send_v2_finalize_refresh_parent() { | |
1094 | if (m_refresh_parent == nullptr) { | |
1095 | return send_v2_shut_down_exclusive_lock(); | |
1096 | } | |
1097 | ||
1098 | CephContext *cct = m_image_ctx.cct; | |
1099 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1100 | ||
1101 | using klass = RefreshRequest<I>; | |
1102 | Context *ctx = create_context_callback< | |
1103 | klass, &klass::handle_v2_finalize_refresh_parent>(this); | |
1104 | m_refresh_parent->finalize(ctx); | |
1105 | return nullptr; | |
1106 | } | |
1107 | ||
1108 | template <typename I> | |
1109 | Context *RefreshRequest<I>::handle_v2_finalize_refresh_parent(int *result) { | |
1110 | CephContext *cct = m_image_ctx.cct; | |
1111 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1112 | ||
11fdf7f2 | 1113 | ceph_assert(m_refresh_parent != nullptr); |
7c673cae FG |
1114 | delete m_refresh_parent; |
1115 | m_refresh_parent = nullptr; | |
1116 | ||
1117 | return send_v2_shut_down_exclusive_lock(); | |
1118 | } | |
1119 | ||
1120 | template <typename I> | |
1121 | Context *RefreshRequest<I>::send_v2_shut_down_exclusive_lock() { | |
1122 | if (m_exclusive_lock == nullptr) { | |
1123 | return send_v2_close_journal(); | |
1124 | } | |
1125 | ||
1126 | CephContext *cct = m_image_ctx.cct; | |
1127 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1128 | ||
1129 | // exclusive lock feature was dynamically disabled. in-flight IO will be | |
1130 | // flushed and in-flight requests will be canceled before releasing lock | |
1131 | using klass = RefreshRequest<I>; | |
1132 | Context *ctx = create_context_callback< | |
1133 | klass, &klass::handle_v2_shut_down_exclusive_lock>(this); | |
1134 | m_exclusive_lock->shut_down(ctx); | |
1135 | return nullptr; | |
1136 | } | |
1137 | ||
1138 | template <typename I> | |
1139 | Context *RefreshRequest<I>::handle_v2_shut_down_exclusive_lock(int *result) { | |
1140 | CephContext *cct = m_image_ctx.cct; | |
1141 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1142 | ||
1143 | if (*result < 0) { | |
1144 | lderr(cct) << "failed to shut down exclusive lock: " | |
1145 | << cpp_strerror(*result) << dendl; | |
1146 | save_result(result); | |
1147 | } | |
1148 | ||
1149 | { | |
1150 | RWLock::WLocker owner_locker(m_image_ctx.owner_lock); | |
11fdf7f2 | 1151 | ceph_assert(m_image_ctx.exclusive_lock == nullptr); |
7c673cae FG |
1152 | } |
1153 | ||
11fdf7f2 | 1154 | ceph_assert(m_exclusive_lock != nullptr); |
7c673cae FG |
1155 | delete m_exclusive_lock; |
1156 | m_exclusive_lock = nullptr; | |
1157 | ||
1158 | return send_v2_close_journal(); | |
1159 | } | |
1160 | ||
1161 | template <typename I> | |
1162 | Context *RefreshRequest<I>::send_v2_close_journal() { | |
1163 | if (m_journal == nullptr) { | |
1164 | return send_v2_close_object_map(); | |
1165 | } | |
1166 | ||
1167 | CephContext *cct = m_image_ctx.cct; | |
1168 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1169 | ||
1170 | // journal feature was dynamically disabled | |
1171 | using klass = RefreshRequest<I>; | |
1172 | Context *ctx = create_context_callback< | |
1173 | klass, &klass::handle_v2_close_journal>(this); | |
1174 | m_journal->close(ctx); | |
1175 | return nullptr; | |
1176 | } | |
1177 | ||
1178 | template <typename I> | |
1179 | Context *RefreshRequest<I>::handle_v2_close_journal(int *result) { | |
1180 | CephContext *cct = m_image_ctx.cct; | |
1181 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1182 | ||
1183 | if (*result < 0) { | |
1184 | save_result(result); | |
1185 | lderr(cct) << "failed to close journal: " << cpp_strerror(*result) | |
1186 | << dendl; | |
1187 | } | |
1188 | ||
11fdf7f2 | 1189 | ceph_assert(m_journal != nullptr); |
7c673cae FG |
1190 | delete m_journal; |
1191 | m_journal = nullptr; | |
1192 | ||
11fdf7f2 | 1193 | ceph_assert(m_blocked_writes); |
7c673cae FG |
1194 | m_blocked_writes = false; |
1195 | ||
1196 | m_image_ctx.io_work_queue->unblock_writes(); | |
1197 | return send_v2_close_object_map(); | |
1198 | } | |
1199 | ||
1200 | template <typename I> | |
1201 | Context *RefreshRequest<I>::send_v2_close_object_map() { | |
1202 | if (m_object_map == nullptr) { | |
1203 | return send_flush_aio(); | |
1204 | } | |
1205 | ||
1206 | CephContext *cct = m_image_ctx.cct; | |
1207 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1208 | ||
1209 | // object map was dynamically disabled | |
1210 | using klass = RefreshRequest<I>; | |
1211 | Context *ctx = create_context_callback< | |
1212 | klass, &klass::handle_v2_close_object_map>(this); | |
1213 | m_object_map->close(ctx); | |
1214 | return nullptr; | |
1215 | } | |
1216 | ||
1217 | template <typename I> | |
1218 | Context *RefreshRequest<I>::handle_v2_close_object_map(int *result) { | |
1219 | CephContext *cct = m_image_ctx.cct; | |
1220 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1221 | ||
11fdf7f2 TL |
1222 | if (*result < 0) { |
1223 | lderr(cct) << "failed to close object map: " << cpp_strerror(*result) | |
1224 | << dendl; | |
1225 | } | |
1226 | ||
1227 | ceph_assert(m_object_map != nullptr); | |
7c673cae FG |
1228 | delete m_object_map; |
1229 | m_object_map = nullptr; | |
1230 | ||
1231 | return send_flush_aio(); | |
1232 | } | |
1233 | ||
1234 | template <typename I> | |
1235 | Context *RefreshRequest<I>::send_flush_aio() { | |
1236 | if (m_incomplete_update && m_error_result == 0) { | |
1237 | // if this was a partial refresh, notify ImageState | |
1238 | m_error_result = -ERESTART; | |
1239 | } | |
1240 | ||
1241 | if (m_flush_aio) { | |
1242 | CephContext *cct = m_image_ctx.cct; | |
1243 | ldout(cct, 10) << this << " " << __func__ << dendl; | |
1244 | ||
11fdf7f2 TL |
1245 | RWLock::RLocker owner_locker(m_image_ctx.owner_lock); |
1246 | auto ctx = create_context_callback< | |
1247 | RefreshRequest<I>, &RefreshRequest<I>::handle_flush_aio>(this); | |
494da23a | 1248 | auto aio_comp = io::AioCompletion::create_and_start( |
11fdf7f2 TL |
1249 | ctx, util::get_image_ctx(&m_image_ctx), io::AIO_TYPE_FLUSH); |
1250 | auto req = io::ImageDispatchSpec<I>::create_flush_request( | |
1251 | m_image_ctx, aio_comp, io::FLUSH_SOURCE_INTERNAL, {}); | |
1252 | req->send(); | |
1253 | delete req; | |
7c673cae FG |
1254 | return nullptr; |
1255 | } else if (m_error_result < 0) { | |
1256 | // propagate saved error back to caller | |
1257 | Context *ctx = create_context_callback< | |
1258 | RefreshRequest<I>, &RefreshRequest<I>::handle_error>(this); | |
1259 | m_image_ctx.op_work_queue->queue(ctx, 0); | |
1260 | return nullptr; | |
1261 | } | |
1262 | ||
1263 | return m_on_finish; | |
1264 | } | |
1265 | ||
1266 | template <typename I> | |
1267 | Context *RefreshRequest<I>::handle_flush_aio(int *result) { | |
1268 | CephContext *cct = m_image_ctx.cct; | |
1269 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1270 | ||
1271 | if (*result < 0) { | |
1272 | lderr(cct) << "failed to flush pending AIO: " << cpp_strerror(*result) | |
1273 | << dendl; | |
1274 | } | |
1275 | ||
1276 | return handle_error(result); | |
1277 | } | |
1278 | ||
1279 | template <typename I> | |
1280 | Context *RefreshRequest<I>::handle_error(int *result) { | |
1281 | if (m_error_result < 0) { | |
1282 | *result = m_error_result; | |
1283 | ||
1284 | CephContext *cct = m_image_ctx.cct; | |
1285 | ldout(cct, 10) << this << " " << __func__ << ": r=" << *result << dendl; | |
1286 | } | |
1287 | return m_on_finish; | |
1288 | } | |
1289 | ||
1290 | template <typename I> | |
1291 | void RefreshRequest<I>::apply() { | |
1292 | CephContext *cct = m_image_ctx.cct; | |
1293 | ldout(cct, 20) << this << " " << __func__ << dendl; | |
1294 | ||
1295 | RWLock::WLocker owner_locker(m_image_ctx.owner_lock); | |
1296 | RWLock::WLocker md_locker(m_image_ctx.md_lock); | |
1297 | ||
1298 | { | |
7c673cae FG |
1299 | RWLock::WLocker snap_locker(m_image_ctx.snap_lock); |
1300 | RWLock::WLocker parent_locker(m_image_ctx.parent_lock); | |
1301 | ||
1302 | m_image_ctx.size = m_size; | |
1303 | m_image_ctx.lockers = m_lockers; | |
1304 | m_image_ctx.lock_tag = m_lock_tag; | |
1305 | m_image_ctx.exclusive_locked = m_exclusive_locked; | |
1306 | ||
11fdf7f2 TL |
1307 | std::map<uint64_t, uint64_t> migration_reverse_snap_seq; |
1308 | ||
7c673cae FG |
1309 | if (m_image_ctx.old_format) { |
1310 | m_image_ctx.order = m_order; | |
1311 | m_image_ctx.features = 0; | |
1312 | m_image_ctx.flags = 0; | |
11fdf7f2 TL |
1313 | m_image_ctx.op_features = 0; |
1314 | m_image_ctx.operations_disabled = false; | |
7c673cae FG |
1315 | m_image_ctx.object_prefix = std::move(m_object_prefix); |
1316 | m_image_ctx.init_layout(); | |
1317 | } else { | |
11fdf7f2 TL |
1318 | // HEAD revision doesn't have a defined overlap so it's only |
1319 | // applicable to snapshots | |
1320 | if (!m_head_parent_overlap) { | |
1321 | m_parent_md = {}; | |
1322 | } | |
1323 | ||
7c673cae FG |
1324 | m_image_ctx.features = m_features; |
1325 | m_image_ctx.flags = m_flags; | |
11fdf7f2 TL |
1326 | m_image_ctx.op_features = m_op_features; |
1327 | m_image_ctx.operations_disabled = ( | |
1328 | (m_op_features & ~RBD_OPERATION_FEATURES_ALL) != 0ULL); | |
7c673cae | 1329 | m_image_ctx.group_spec = m_group_spec; |
11fdf7f2 TL |
1330 | if (get_migration_info(&m_image_ctx.parent_md, |
1331 | &m_image_ctx.migration_info)) { | |
1332 | for (auto it : m_image_ctx.migration_info.snap_map) { | |
1333 | migration_reverse_snap_seq[it.second.front()] = it.first; | |
1334 | } | |
1335 | } else { | |
1336 | m_image_ctx.parent_md = m_parent_md; | |
1337 | m_image_ctx.migration_info = {}; | |
1338 | } | |
7c673cae FG |
1339 | } |
1340 | ||
1341 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { | |
1342 | std::vector<librados::snap_t>::const_iterator it = std::find( | |
1343 | m_image_ctx.snaps.begin(), m_image_ctx.snaps.end(), | |
1344 | m_snapc.snaps[i].val); | |
1345 | if (it == m_image_ctx.snaps.end()) { | |
1346 | m_flush_aio = true; | |
1347 | ldout(cct, 20) << "new snapshot id=" << m_snapc.snaps[i].val | |
11fdf7f2 TL |
1348 | << " name=" << m_snap_infos[i].name |
1349 | << " size=" << m_snap_infos[i].image_size | |
7c673cae FG |
1350 | << dendl; |
1351 | } | |
1352 | } | |
1353 | ||
1354 | m_image_ctx.snaps.clear(); | |
1355 | m_image_ctx.snap_info.clear(); | |
1356 | m_image_ctx.snap_ids.clear(); | |
11fdf7f2 | 1357 | auto overlap = m_image_ctx.parent_md.overlap; |
7c673cae FG |
1358 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { |
1359 | uint64_t flags = m_image_ctx.old_format ? 0 : m_snap_flags[i]; | |
1360 | uint8_t protection_status = m_image_ctx.old_format ? | |
1361 | static_cast<uint8_t>(RBD_PROTECTION_STATUS_UNPROTECTED) : | |
1362 | m_snap_protection[i]; | |
11fdf7f2 | 1363 | ParentImageInfo parent; |
7c673cae | 1364 | if (!m_image_ctx.old_format) { |
11fdf7f2 TL |
1365 | if (!m_image_ctx.migration_info.empty()) { |
1366 | parent = m_image_ctx.parent_md; | |
1367 | auto it = migration_reverse_snap_seq.find(m_snapc.snaps[i].val); | |
1368 | if (it != migration_reverse_snap_seq.end()) { | |
1369 | parent.spec.snap_id = it->second; | |
1370 | parent.overlap = m_snap_infos[i].image_size; | |
1371 | } else { | |
1372 | overlap = std::min(overlap, m_snap_infos[i].image_size); | |
1373 | parent.overlap = overlap; | |
1374 | } | |
1375 | } else { | |
1376 | parent = m_snap_parents[i]; | |
1377 | } | |
7c673cae | 1378 | } |
11fdf7f2 TL |
1379 | m_image_ctx.add_snap(m_snap_infos[i].snapshot_namespace, |
1380 | m_snap_infos[i].name, m_snapc.snaps[i].val, | |
1381 | m_snap_infos[i].image_size, parent, | |
1382 | protection_status, flags, | |
1383 | m_snap_infos[i].timestamp); | |
7c673cae | 1384 | } |
11fdf7f2 | 1385 | m_image_ctx.parent_md.overlap = std::min(overlap, m_image_ctx.size); |
7c673cae FG |
1386 | m_image_ctx.snapc = m_snapc; |
1387 | ||
1388 | if (m_image_ctx.snap_id != CEPH_NOSNAP && | |
1389 | m_image_ctx.get_snap_id(m_image_ctx.snap_namespace, | |
1390 | m_image_ctx.snap_name) != m_image_ctx.snap_id) { | |
1391 | lderr(cct) << "tried to read from a snapshot that no longer exists: " | |
1392 | << m_image_ctx.snap_name << dendl; | |
1393 | m_image_ctx.snap_exists = false; | |
1394 | } | |
1395 | ||
1396 | if (m_refresh_parent != nullptr) { | |
1397 | m_refresh_parent->apply(); | |
1398 | } | |
1399 | m_image_ctx.data_ctx.selfmanaged_snap_set_write_ctx(m_image_ctx.snapc.seq, | |
1400 | m_image_ctx.snaps); | |
1401 | ||
1402 | // handle dynamically enabled / disabled features | |
1403 | if (m_image_ctx.exclusive_lock != nullptr && | |
1404 | !m_image_ctx.test_features(RBD_FEATURE_EXCLUSIVE_LOCK, | |
1405 | m_image_ctx.snap_lock)) { | |
1406 | // disabling exclusive lock will automatically handle closing | |
1407 | // object map and journaling | |
11fdf7f2 | 1408 | ceph_assert(m_exclusive_lock == nullptr); |
7c673cae | 1409 | m_exclusive_lock = m_image_ctx.exclusive_lock; |
7c673cae FG |
1410 | } else { |
1411 | if (m_exclusive_lock != nullptr) { | |
11fdf7f2 | 1412 | ceph_assert(m_image_ctx.exclusive_lock == nullptr); |
7c673cae FG |
1413 | std::swap(m_exclusive_lock, m_image_ctx.exclusive_lock); |
1414 | } | |
1415 | if (!m_image_ctx.test_features(RBD_FEATURE_JOURNALING, | |
1416 | m_image_ctx.snap_lock)) { | |
224ce89b WB |
1417 | if (!m_image_ctx.clone_copy_on_read && m_image_ctx.journal != nullptr) { |
1418 | m_image_ctx.io_work_queue->set_require_lock(io::DIRECTION_READ, | |
1419 | false); | |
7c673cae FG |
1420 | } |
1421 | std::swap(m_journal, m_image_ctx.journal); | |
1422 | } else if (m_journal != nullptr) { | |
1423 | std::swap(m_journal, m_image_ctx.journal); | |
1424 | } | |
1425 | if (!m_image_ctx.test_features(RBD_FEATURE_OBJECT_MAP, | |
1426 | m_image_ctx.snap_lock) || | |
1427 | m_object_map != nullptr) { | |
1428 | std::swap(m_object_map, m_image_ctx.object_map); | |
1429 | } | |
7c673cae FG |
1430 | } |
1431 | } | |
1432 | } | |
1433 | ||
1434 | template <typename I> | |
1435 | int RefreshRequest<I>::get_parent_info(uint64_t snap_id, | |
11fdf7f2 TL |
1436 | ParentImageInfo *parent_md, |
1437 | MigrationInfo *migration_info) { | |
1438 | if (get_migration_info(parent_md, migration_info)) { | |
1439 | return 0; | |
1440 | } else if (snap_id == CEPH_NOSNAP) { | |
7c673cae | 1441 | *parent_md = m_parent_md; |
11fdf7f2 | 1442 | *migration_info = {}; |
7c673cae FG |
1443 | return 0; |
1444 | } else { | |
1445 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { | |
1446 | if (m_snapc.snaps[i].val == snap_id) { | |
1447 | *parent_md = m_snap_parents[i]; | |
11fdf7f2 | 1448 | *migration_info = {}; |
7c673cae FG |
1449 | return 0; |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | return -ENOENT; | |
1454 | } | |
1455 | ||
11fdf7f2 TL |
1456 | template <typename I> |
1457 | bool RefreshRequest<I>::get_migration_info(ParentImageInfo *parent_md, | |
1458 | MigrationInfo *migration_info) { | |
1459 | if (m_migration_spec.header_type != cls::rbd::MIGRATION_HEADER_TYPE_DST || | |
1460 | (m_migration_spec.state != cls::rbd::MIGRATION_STATE_PREPARED && | |
1461 | m_migration_spec.state != cls::rbd::MIGRATION_STATE_EXECUTING)) { | |
1462 | ceph_assert(m_migration_spec.header_type == | |
1463 | cls::rbd::MIGRATION_HEADER_TYPE_SRC || | |
1464 | m_migration_spec.pool_id == -1 || | |
1465 | m_migration_spec.state == cls::rbd::MIGRATION_STATE_EXECUTED); | |
1466 | ||
1467 | return false; | |
1468 | } | |
1469 | ||
1470 | parent_md->spec.pool_id = m_migration_spec.pool_id; | |
1471 | parent_md->spec.pool_namespace = m_migration_spec.pool_namespace; | |
1472 | parent_md->spec.image_id = m_migration_spec.image_id; | |
1473 | parent_md->spec.snap_id = CEPH_NOSNAP; | |
1474 | parent_md->overlap = std::min(m_size, m_migration_spec.overlap); | |
1475 | ||
1476 | auto snap_seqs = m_migration_spec.snap_seqs; | |
1477 | // If new snapshots have been created on destination image after | |
1478 | // migration stared, map the source CEPH_NOSNAP to the earliest of | |
1479 | // these snapshots. | |
1480 | snapid_t snap_id = snap_seqs.empty() ? 0 : snap_seqs.rbegin()->second; | |
1481 | auto it = std::upper_bound(m_snapc.snaps.rbegin(), m_snapc.snaps.rend(), | |
1482 | snap_id); | |
1483 | if (it != m_snapc.snaps.rend()) { | |
1484 | snap_seqs[CEPH_NOSNAP] = *it; | |
1485 | } else { | |
1486 | snap_seqs[CEPH_NOSNAP] = CEPH_NOSNAP; | |
1487 | } | |
1488 | ||
1489 | std::set<uint64_t> snap_ids; | |
1490 | for (auto& it : snap_seqs) { | |
1491 | snap_ids.insert(it.second); | |
1492 | } | |
1493 | uint64_t overlap = snap_ids.find(CEPH_NOSNAP) != snap_ids.end() ? | |
1494 | parent_md->overlap : 0; | |
1495 | for (size_t i = 0; i < m_snapc.snaps.size(); ++i) { | |
1496 | if (snap_ids.find(m_snapc.snaps[i].val) != snap_ids.end()) { | |
1497 | overlap = std::max(overlap, m_snap_infos[i].image_size); | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | *migration_info = {m_migration_spec.pool_id, m_migration_spec.pool_namespace, | |
1502 | m_migration_spec.image_name, m_migration_spec.image_id, {}, | |
1503 | overlap, m_migration_spec.flatten}; | |
1504 | ||
1505 | deep_copy::util::compute_snap_map(0, CEPH_NOSNAP, snap_seqs, | |
1506 | &migration_info->snap_map); | |
1507 | return true; | |
1508 | } | |
1509 | ||
7c673cae FG |
1510 | } // namespace image |
1511 | } // namespace librbd | |
1512 | ||
1513 | template class librbd::image::RefreshRequest<librbd::ImageCtx>; |