1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/journal/DemoteRequest.h"
5 #include "common/dout.h"
6 #include "common/errno.h"
7 #include "journal/Journaler.h"
8 #include "journal/Settings.h"
9 #include "librbd/ImageCtx.h"
10 #include "librbd/Journal.h"
11 #include "librbd/Utils.h"
12 #include "librbd/asio/ContextWQ.h"
13 #include "librbd/journal/OpenRequest.h"
15 #define dout_subsys ceph_subsys_rbd
17 #define dout_prefix *_dout << "librbd::journal::DemoteRequest: " << this \
18 << " " << __func__ << ": "
23 using librbd::util::create_async_context_callback
;
24 using librbd::util::create_context_callback
;
27 DemoteRequest
<I
>::DemoteRequest(I
&image_ctx
, Context
*on_finish
)
28 : m_image_ctx(image_ctx
), m_on_finish(on_finish
),
29 m_lock(ceph::make_mutex("DemoteRequest::m_lock")) {
33 DemoteRequest
<I
>::~DemoteRequest() {
34 ceph_assert(m_journaler
== nullptr);
38 void DemoteRequest
<I
>::send() {
43 void DemoteRequest
<I
>::open_journaler() {
44 CephContext
*cct
= m_image_ctx
.cct
;
45 ldout(cct
, 20) << dendl
;
47 m_journaler
= new Journaler(m_image_ctx
.md_ctx
, m_image_ctx
.id
,
48 Journal
<>::IMAGE_CLIENT_ID
, {}, nullptr);
49 auto ctx
= create_async_context_callback(
50 m_image_ctx
, create_context_callback
<
51 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_open_journaler
>(this));
52 auto req
= OpenRequest
<I
>::create(&m_image_ctx
, m_journaler
, &m_lock
,
53 &m_client_meta
, &m_tag_tid
, &m_tag_data
,
59 void DemoteRequest
<I
>::handle_open_journaler(int r
) {
60 CephContext
*cct
= m_image_ctx
.cct
;
61 ldout(cct
, 20) << "r=" << r
<< dendl
;
65 lderr(cct
) << "failed to open journal: " << cpp_strerror(r
) << dendl
;
66 shut_down_journaler();
68 } else if (m_tag_data
.mirror_uuid
!= Journal
<>::LOCAL_MIRROR_UUID
) {
70 lderr(cct
) << "image is not currently the primary" << dendl
;
71 shut_down_journaler();
79 void DemoteRequest
<I
>::allocate_tag() {
80 CephContext
*cct
= m_image_ctx
.cct
;
81 ldout(cct
, 20) << dendl
;
83 cls::journal::Client client
;
84 int r
= m_journaler
->get_cached_client(Journal
<>::IMAGE_CLIENT_ID
, &client
);
87 lderr(cct
) << "failed to retrieve client: " << cpp_strerror(r
) << dendl
;
88 shut_down_journaler();
92 TagPredecessor predecessor
;
93 predecessor
.mirror_uuid
= Journal
<>::LOCAL_MIRROR_UUID
;
94 if (!client
.commit_position
.object_positions
.empty()) {
95 auto position
= client
.commit_position
.object_positions
.front();
96 predecessor
.commit_valid
= true;
97 predecessor
.tag_tid
= position
.tag_tid
;
98 predecessor
.entry_tid
= position
.entry_tid
;
102 tag_data
.mirror_uuid
= Journal
<>::ORPHAN_MIRROR_UUID
;
103 tag_data
.predecessor
= std::move(predecessor
);
106 encode(tag_data
, tag_bl
);
108 auto ctx
= create_context_callback
<
109 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_allocate_tag
>(this);
110 m_journaler
->allocate_tag(m_client_meta
.tag_class
, tag_bl
, &m_tag
, ctx
);
113 template <typename I
>
114 void DemoteRequest
<I
>::handle_allocate_tag(int r
) {
115 CephContext
*cct
= m_image_ctx
.cct
;
116 ldout(cct
, 20) << "r=" << r
<< dendl
;
120 lderr(cct
) << "failed to allocate tag: " << cpp_strerror(r
) << dendl
;
121 shut_down_journaler();
125 m_tag_tid
= m_tag
.tid
;
129 template <typename I
>
130 void DemoteRequest
<I
>::append_event() {
131 CephContext
*cct
= m_image_ctx
.cct
;
132 ldout(cct
, 20) << dendl
;
134 EventEntry event_entry
{DemotePromoteEvent
{}, {}};
135 bufferlist event_entry_bl
;
136 encode(event_entry
, event_entry_bl
);
138 m_journaler
->start_append(0);
139 m_future
= m_journaler
->append(m_tag_tid
, event_entry_bl
);
141 auto ctx
= create_context_callback
<
142 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_append_event
>(this);
147 template <typename I
>
148 void DemoteRequest
<I
>::handle_append_event(int r
) {
149 CephContext
*cct
= m_image_ctx
.cct
;
150 ldout(cct
, 20) << "r=" << r
<< dendl
;
154 lderr(cct
) << "failed to append demotion journal event: " << cpp_strerror(r
)
163 template <typename I
>
164 void DemoteRequest
<I
>::commit_event() {
165 CephContext
*cct
= m_image_ctx
.cct
;
166 ldout(cct
, 20) << dendl
;
168 m_journaler
->committed(m_future
);
170 auto ctx
= create_context_callback
<
171 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_commit_event
>(this);
172 m_journaler
->flush_commit_position(ctx
);
175 template <typename I
>
176 void DemoteRequest
<I
>::handle_commit_event(int r
) {
177 CephContext
*cct
= m_image_ctx
.cct
;
178 ldout(cct
, 20) << "r=" << r
<< dendl
;
182 lderr(cct
) << "failed to flush demotion commit position: "
183 << cpp_strerror(r
) << dendl
;
189 template <typename I
>
190 void DemoteRequest
<I
>::stop_append() {
191 CephContext
*cct
= m_image_ctx
.cct
;
192 ldout(cct
, 20) << dendl
;
194 auto ctx
= create_context_callback
<
195 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_stop_append
>(this);
196 m_journaler
->stop_append(ctx
);
199 template <typename I
>
200 void DemoteRequest
<I
>::handle_stop_append(int r
) {
201 CephContext
*cct
= m_image_ctx
.cct
;
202 ldout(cct
, 20) << "r=" << r
<< dendl
;
205 if (m_ret_val
== 0) {
208 lderr(cct
) << "failed to stop journal append: " << cpp_strerror(r
) << dendl
;
211 shut_down_journaler();
214 template <typename I
>
215 void DemoteRequest
<I
>::shut_down_journaler() {
216 CephContext
*cct
= m_image_ctx
.cct
;
217 ldout(cct
, 20) << dendl
;
219 Context
*ctx
= create_async_context_callback(
220 m_image_ctx
, create_context_callback
<
221 DemoteRequest
<I
>, &DemoteRequest
<I
>::handle_shut_down_journaler
>(this));
222 m_journaler
->shut_down(ctx
);
225 template <typename I
>
226 void DemoteRequest
<I
>::handle_shut_down_journaler(int r
) {
227 CephContext
*cct
= m_image_ctx
.cct
;
228 ldout(cct
, 20) << "r=" << r
<< dendl
;
231 lderr(cct
) << "failed to shut down journal: " << cpp_strerror(r
) << dendl
;
235 m_journaler
= nullptr;
239 template <typename I
>
240 void DemoteRequest
<I
>::finish(int r
) {
245 CephContext
*cct
= m_image_ctx
.cct
;
246 ldout(cct
, 20) << "r=" << r
<< dendl
;
248 m_on_finish
->complete(r
);
252 } // namespace journal
253 } // namespace librbd
255 template class librbd::journal::DemoteRequest
<librbd::ImageCtx
>;