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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | ||
4 | #include "librbd/exclusive_lock/PreReleaseRequest.h" | |
31f18b77 | 5 | #include "common/AsyncOpTracker.h" |
7c673cae FG |
6 | #include "common/dout.h" |
7 | #include "common/errno.h" | |
8 | #include "librbd/ExclusiveLock.h" | |
9 | #include "librbd/ImageState.h" | |
10 | #include "librbd/ImageWatcher.h" | |
11 | #include "librbd/Journal.h" | |
12 | #include "librbd/ObjectMap.h" | |
13 | #include "librbd/Utils.h" | |
14 | #include "librbd/io/ImageRequestWQ.h" | |
11fdf7f2 | 15 | #include "librbd/io/ObjectDispatcher.h" |
7c673cae FG |
16 | |
17 | #define dout_subsys ceph_subsys_rbd | |
18 | #undef dout_prefix | |
19 | #define dout_prefix *_dout << "librbd::exclusive_lock::PreReleaseRequest: " \ | |
20 | << this << " " << __func__ << ": " | |
21 | ||
22 | namespace librbd { | |
23 | namespace exclusive_lock { | |
24 | ||
25 | using util::create_async_context_callback; | |
26 | using util::create_context_callback; | |
27 | ||
28 | template <typename I> | |
31f18b77 FG |
29 | PreReleaseRequest<I>* PreReleaseRequest<I>::create( |
30 | I &image_ctx, bool shutting_down, AsyncOpTracker &async_op_tracker, | |
31 | Context *on_finish) { | |
32 | return new PreReleaseRequest(image_ctx, shutting_down, async_op_tracker, | |
33 | on_finish); | |
7c673cae FG |
34 | } |
35 | ||
36 | template <typename I> | |
37 | PreReleaseRequest<I>::PreReleaseRequest(I &image_ctx, bool shutting_down, | |
31f18b77 | 38 | AsyncOpTracker &async_op_tracker, |
7c673cae | 39 | Context *on_finish) |
31f18b77 FG |
40 | : m_image_ctx(image_ctx), m_shutting_down(shutting_down), |
41 | m_async_op_tracker(async_op_tracker), | |
42 | m_on_finish(create_async_context_callback(image_ctx, on_finish)) { | |
7c673cae FG |
43 | } |
44 | ||
45 | template <typename I> | |
46 | PreReleaseRequest<I>::~PreReleaseRequest() { | |
47 | if (!m_shutting_down) { | |
48 | m_image_ctx.state->handle_prepare_lock_complete(); | |
49 | } | |
50 | } | |
51 | ||
52 | template <typename I> | |
53 | void PreReleaseRequest<I>::send() { | |
54 | send_prepare_lock(); | |
55 | } | |
56 | ||
57 | template <typename I> | |
58 | void PreReleaseRequest<I>::send_prepare_lock() { | |
59 | if (m_shutting_down) { | |
60 | send_cancel_op_requests(); | |
61 | return; | |
62 | } | |
63 | ||
64 | CephContext *cct = m_image_ctx.cct; | |
65 | ldout(cct, 10) << dendl; | |
66 | ||
67 | // release the lock if the image is not busy performing other actions | |
68 | Context *ctx = create_context_callback< | |
69 | PreReleaseRequest<I>, &PreReleaseRequest<I>::handle_prepare_lock>(this); | |
70 | m_image_ctx.state->prepare_lock(ctx); | |
71 | } | |
72 | ||
73 | template <typename I> | |
74 | void PreReleaseRequest<I>::handle_prepare_lock(int r) { | |
75 | CephContext *cct = m_image_ctx.cct; | |
76 | ldout(cct, 10) << "r=" << r << dendl; | |
77 | ||
78 | send_cancel_op_requests(); | |
79 | } | |
80 | ||
81 | template <typename I> | |
82 | void PreReleaseRequest<I>::send_cancel_op_requests() { | |
83 | CephContext *cct = m_image_ctx.cct; | |
84 | ldout(cct, 10) << dendl; | |
85 | ||
86 | using klass = PreReleaseRequest<I>; | |
87 | Context *ctx = create_context_callback< | |
88 | klass, &klass::handle_cancel_op_requests>(this); | |
89 | m_image_ctx.cancel_async_requests(ctx); | |
90 | } | |
91 | ||
92 | template <typename I> | |
93 | void PreReleaseRequest<I>::handle_cancel_op_requests(int r) { | |
94 | CephContext *cct = m_image_ctx.cct; | |
95 | ldout(cct, 10) << "r=" << r << dendl; | |
96 | ||
11fdf7f2 | 97 | ceph_assert(r == 0); |
7c673cae FG |
98 | |
99 | send_block_writes(); | |
100 | } | |
101 | ||
102 | template <typename I> | |
103 | void PreReleaseRequest<I>::send_block_writes() { | |
104 | CephContext *cct = m_image_ctx.cct; | |
105 | ldout(cct, 10) << dendl; | |
106 | ||
107 | using klass = PreReleaseRequest<I>; | |
108 | Context *ctx = create_context_callback< | |
109 | klass, &klass::handle_block_writes>(this); | |
110 | ||
111 | { | |
112 | RWLock::RLocker owner_locker(m_image_ctx.owner_lock); | |
224ce89b WB |
113 | // setting the lock as required will automatically cause the IO |
114 | // queue to re-request the lock if any IO is queued | |
115 | if (m_image_ctx.clone_copy_on_read || | |
116 | m_image_ctx.test_features(RBD_FEATURE_JOURNALING)) { | |
117 | m_image_ctx.io_work_queue->set_require_lock(io::DIRECTION_BOTH, true); | |
118 | } else { | |
119 | m_image_ctx.io_work_queue->set_require_lock(io::DIRECTION_WRITE, true); | |
7c673cae FG |
120 | } |
121 | m_image_ctx.io_work_queue->block_writes(ctx); | |
122 | } | |
123 | } | |
124 | ||
125 | template <typename I> | |
126 | void PreReleaseRequest<I>::handle_block_writes(int r) { | |
127 | CephContext *cct = m_image_ctx.cct; | |
128 | ldout(cct, 10) << "r=" << r << dendl; | |
129 | ||
130 | if (r == -EBLACKLISTED) { | |
131 | // allow clean shut down if blacklisted | |
132 | lderr(cct) << "failed to block writes because client is blacklisted" | |
133 | << dendl; | |
134 | } else if (r < 0) { | |
135 | lderr(cct) << "failed to block writes: " << cpp_strerror(r) << dendl; | |
136 | m_image_ctx.io_work_queue->unblock_writes(); | |
137 | save_result(r); | |
138 | finish(); | |
139 | return; | |
140 | } | |
141 | ||
31f18b77 FG |
142 | send_wait_for_ops(); |
143 | } | |
144 | ||
145 | template <typename I> | |
146 | void PreReleaseRequest<I>::send_wait_for_ops() { | |
147 | CephContext *cct = m_image_ctx.cct; | |
148 | ldout(cct, 10) << dendl; | |
149 | ||
150 | Context *ctx = create_context_callback< | |
151 | PreReleaseRequest<I>, &PreReleaseRequest<I>::handle_wait_for_ops>(this); | |
152 | m_async_op_tracker.wait_for_ops(ctx); | |
153 | } | |
154 | ||
155 | template <typename I> | |
156 | void PreReleaseRequest<I>::handle_wait_for_ops(int r) { | |
157 | CephContext *cct = m_image_ctx.cct; | |
158 | ldout(cct, 10) << dendl; | |
159 | ||
11fdf7f2 | 160 | send_invalidate_cache(); |
7c673cae FG |
161 | } |
162 | ||
163 | template <typename I> | |
11fdf7f2 | 164 | void PreReleaseRequest<I>::send_invalidate_cache() { |
7c673cae | 165 | CephContext *cct = m_image_ctx.cct; |
11fdf7f2 | 166 | ldout(cct, 10) << dendl; |
7c673cae FG |
167 | |
168 | RWLock::RLocker owner_lock(m_image_ctx.owner_lock); | |
11fdf7f2 | 169 | Context *ctx = create_context_callback< |
7c673cae | 170 | PreReleaseRequest<I>, |
11fdf7f2 TL |
171 | &PreReleaseRequest<I>::handle_invalidate_cache>(this); |
172 | m_image_ctx.io_object_dispatcher->invalidate_cache(ctx); | |
7c673cae FG |
173 | } |
174 | ||
175 | template <typename I> | |
176 | void PreReleaseRequest<I>::handle_invalidate_cache(int r) { | |
177 | CephContext *cct = m_image_ctx.cct; | |
178 | ldout(cct, 10) << "r=" << r << dendl; | |
179 | ||
11fdf7f2 | 180 | if (r < 0 && r != -EBLACKLISTED && r != -EBUSY) { |
7c673cae FG |
181 | lderr(cct) << "failed to invalidate cache: " << cpp_strerror(r) |
182 | << dendl; | |
183 | m_image_ctx.io_work_queue->unblock_writes(); | |
184 | save_result(r); | |
185 | finish(); | |
186 | return; | |
187 | } | |
188 | ||
189 | send_flush_notifies(); | |
190 | } | |
191 | ||
192 | template <typename I> | |
193 | void PreReleaseRequest<I>::send_flush_notifies() { | |
194 | CephContext *cct = m_image_ctx.cct; | |
195 | ldout(cct, 10) << dendl; | |
196 | ||
197 | using klass = PreReleaseRequest<I>; | |
198 | Context *ctx = | |
199 | create_context_callback<klass, &klass::handle_flush_notifies>(this); | |
200 | m_image_ctx.image_watcher->flush(ctx); | |
201 | } | |
202 | ||
203 | template <typename I> | |
204 | void PreReleaseRequest<I>::handle_flush_notifies(int r) { | |
205 | CephContext *cct = m_image_ctx.cct; | |
206 | ldout(cct, 10) << dendl; | |
207 | ||
11fdf7f2 | 208 | ceph_assert(r == 0); |
7c673cae FG |
209 | send_close_journal(); |
210 | } | |
211 | ||
212 | template <typename I> | |
213 | void PreReleaseRequest<I>::send_close_journal() { | |
214 | { | |
215 | RWLock::WLocker snap_locker(m_image_ctx.snap_lock); | |
216 | std::swap(m_journal, m_image_ctx.journal); | |
217 | } | |
218 | ||
219 | if (m_journal == nullptr) { | |
220 | send_close_object_map(); | |
221 | return; | |
222 | } | |
223 | ||
224 | CephContext *cct = m_image_ctx.cct; | |
225 | ldout(cct, 10) << dendl; | |
226 | ||
227 | using klass = PreReleaseRequest<I>; | |
228 | Context *ctx = create_context_callback<klass, &klass::handle_close_journal>( | |
229 | this); | |
230 | m_journal->close(ctx); | |
231 | } | |
232 | ||
233 | template <typename I> | |
234 | void PreReleaseRequest<I>::handle_close_journal(int r) { | |
235 | CephContext *cct = m_image_ctx.cct; | |
236 | ldout(cct, 10) << "r=" << r << dendl; | |
237 | ||
238 | if (r < 0) { | |
239 | // error implies some journal events were not flushed -- continue | |
240 | lderr(cct) << "failed to close journal: " << cpp_strerror(r) << dendl; | |
241 | } | |
242 | ||
243 | delete m_journal; | |
244 | ||
245 | send_close_object_map(); | |
246 | } | |
247 | ||
248 | template <typename I> | |
249 | void PreReleaseRequest<I>::send_close_object_map() { | |
250 | { | |
251 | RWLock::WLocker snap_locker(m_image_ctx.snap_lock); | |
252 | std::swap(m_object_map, m_image_ctx.object_map); | |
253 | } | |
254 | ||
255 | if (m_object_map == nullptr) { | |
256 | send_unlock(); | |
257 | return; | |
258 | } | |
259 | ||
260 | CephContext *cct = m_image_ctx.cct; | |
261 | ldout(cct, 10) << dendl; | |
262 | ||
263 | using klass = PreReleaseRequest<I>; | |
264 | Context *ctx = create_context_callback< | |
265 | klass, &klass::handle_close_object_map>(this); | |
266 | m_object_map->close(ctx); | |
267 | } | |
268 | ||
269 | template <typename I> | |
270 | void PreReleaseRequest<I>::handle_close_object_map(int r) { | |
271 | CephContext *cct = m_image_ctx.cct; | |
272 | ldout(cct, 10) << "r=" << r << dendl; | |
273 | ||
11fdf7f2 TL |
274 | if (r < 0) { |
275 | lderr(cct) << "failed to close object map: " << cpp_strerror(r) << dendl; | |
276 | } | |
7c673cae | 277 | |
11fdf7f2 | 278 | delete m_object_map; |
7c673cae FG |
279 | send_unlock(); |
280 | } | |
281 | ||
282 | template <typename I> | |
283 | void PreReleaseRequest<I>::send_unlock() { | |
284 | CephContext *cct = m_image_ctx.cct; | |
285 | ldout(cct, 10) << dendl; | |
286 | ||
287 | finish(); | |
288 | } | |
289 | ||
290 | template <typename I> | |
291 | void PreReleaseRequest<I>::finish() { | |
292 | m_on_finish->complete(m_error_result); | |
293 | delete this; | |
294 | } | |
295 | ||
296 | } // namespace exclusive_lock | |
297 | } // namespace librbd | |
298 | ||
299 | template class librbd::exclusive_lock::PreReleaseRequest<librbd::ImageCtx>; |