1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/object_map/SnapshotRemoveRequest.h"
5 #include "common/dout.h"
6 #include "common/errno.h"
7 #include "librbd/ImageCtx.h"
8 #include "librbd/ObjectMap.h"
9 #include "librbd/object_map/InvalidateRequest.h"
10 #include "cls/lock/cls_lock_client.h"
12 #define dout_subsys ceph_subsys_rbd
14 #define dout_prefix *_dout << "librbd::object_map::SnapshotRemoveRequest: "
17 namespace object_map
{
21 std::ostream
& operator<<(std::ostream
& os
,
22 const SnapshotRemoveRequest::State
& state
) {
24 case SnapshotRemoveRequest::STATE_LOAD_MAP
:
27 case SnapshotRemoveRequest::STATE_REMOVE_SNAPSHOT
:
28 os
<< "REMOVE_SNAPSHOT";
30 case SnapshotRemoveRequest::STATE_INVALIDATE_NEXT_MAP
:
31 os
<< "INVALIDATE_NEXT_MAP";
33 case SnapshotRemoveRequest::STATE_REMOVE_MAP
:
37 os
<< "UNKNOWN (" << static_cast<uint32_t>(state
) << ")";
43 } // anonymous namespace
45 void SnapshotRemoveRequest::send() {
46 assert(m_image_ctx
.owner_lock
.is_locked());
47 assert(m_image_ctx
.snap_lock
.is_wlocked());
49 if ((m_image_ctx
.features
& RBD_FEATURE_FAST_DIFF
) != 0) {
50 compute_next_snap_id();
53 int r
= m_image_ctx
.get_flags(m_snap_id
, &flags
);
56 if ((flags
& RBD_FLAG_OBJECT_MAP_INVALID
) != 0) {
57 send_invalidate_next_map();
66 bool SnapshotRemoveRequest::should_complete(int r
) {
67 CephContext
*cct
= m_image_ctx
.cct
;
68 ldout(cct
, 5) << this << " " << __func__
<< ": state=" << m_state
<< ", "
69 << "r=" << r
<< dendl
;
71 RWLock::RLocker
owner_locker(m_image_ctx
.owner_lock
);
72 bool finished
= false;
81 bufferlist::iterator it
= m_out_bl
.begin();
82 r
= cls_client::object_map_load_finish(&it
, &m_snap_object_map
);
85 RWLock::WLocker
snap_locker(m_image_ctx
.snap_lock
);
86 send_invalidate_next_map();
88 send_remove_snapshot();
91 case STATE_REMOVE_SNAPSHOT
:
92 if (r
< 0 && r
!= -ENOENT
) {
93 RWLock::WLocker
snap_locker(m_image_ctx
.snap_lock
);
94 send_invalidate_next_map();
100 case STATE_INVALIDATE_NEXT_MAP
:
103 case STATE_REMOVE_MAP
:
113 void SnapshotRemoveRequest::send_load_map() {
114 CephContext
*cct
= m_image_ctx
.cct
;
115 std::string
snap_oid(ObjectMap
<>::object_map_name(m_image_ctx
.id
, m_snap_id
));
116 ldout(cct
, 5) << this << " " << __func__
<< ": snap_oid=" << snap_oid
118 m_state
= STATE_LOAD_MAP
;
120 librados::ObjectReadOperation op
;
121 cls_client::object_map_load_start(&op
);
123 librados::AioCompletion
*rados_completion
= create_callback_completion();
124 int r
= m_image_ctx
.md_ctx
.aio_operate(snap_oid
, rados_completion
, &op
,
127 rados_completion
->release();
130 void SnapshotRemoveRequest::send_remove_snapshot() {
131 CephContext
*cct
= m_image_ctx
.cct
;
132 std::string
oid(ObjectMap
<>::object_map_name(m_image_ctx
.id
, m_next_snap_id
));
133 ldout(cct
, 5) << this << " " << __func__
<< ": oid=" << oid
<< dendl
;
134 m_state
= STATE_REMOVE_SNAPSHOT
;
136 librados::ObjectWriteOperation op
;
137 if (m_next_snap_id
== CEPH_NOSNAP
) {
138 rados::cls::lock::assert_locked(&op
, RBD_LOCK_NAME
, LOCK_EXCLUSIVE
, "", "");
140 cls_client::object_map_snap_remove(&op
, m_snap_object_map
);
142 librados::AioCompletion
*rados_completion
= create_callback_completion();
143 int r
= m_image_ctx
.md_ctx
.aio_operate(oid
, rados_completion
, &op
);
145 rados_completion
->release();
148 void SnapshotRemoveRequest::send_invalidate_next_map() {
149 assert(m_image_ctx
.owner_lock
.is_locked());
150 assert(m_image_ctx
.snap_lock
.is_wlocked());
152 CephContext
*cct
= m_image_ctx
.cct
;
153 ldout(cct
, 5) << this << " " << __func__
<< dendl
;
154 m_state
= STATE_INVALIDATE_NEXT_MAP
;
156 InvalidateRequest
<> *req
= new InvalidateRequest
<>(m_image_ctx
,
157 m_next_snap_id
, true,
158 create_callback_context());
162 void SnapshotRemoveRequest::send_remove_map() {
163 CephContext
*cct
= m_image_ctx
.cct
;
164 std::string
oid(ObjectMap
<>::object_map_name(m_image_ctx
.id
, m_snap_id
));
165 ldout(cct
, 5) << this << " " << __func__
<< ": oid=" << oid
<< dendl
;
166 m_state
= STATE_REMOVE_MAP
;
168 librados::ObjectWriteOperation op
;
171 librados::AioCompletion
*rados_completion
= create_callback_completion();
172 int r
= m_image_ctx
.md_ctx
.aio_operate(oid
, rados_completion
, &op
);
174 rados_completion
->release();
177 void SnapshotRemoveRequest::compute_next_snap_id() {
178 assert(m_image_ctx
.snap_lock
.is_locked());
180 m_next_snap_id
= CEPH_NOSNAP
;
181 std::map
<librados::snap_t
, SnapInfo
>::const_iterator it
=
182 m_image_ctx
.snap_info
.find(m_snap_id
);
183 assert(it
!= m_image_ctx
.snap_info
.end());
186 if (it
!= m_image_ctx
.snap_info
.end()) {
187 m_next_snap_id
= it
->first
;
191 void SnapshotRemoveRequest::update_object_map() {
192 RWLock::RLocker
snap_locker(m_image_ctx
.snap_lock
);
193 RWLock::WLocker
object_map_locker(m_image_ctx
.object_map_lock
);
194 if (m_next_snap_id
== m_image_ctx
.snap_id
&& m_next_snap_id
== CEPH_NOSNAP
) {
195 CephContext
*cct
= m_image_ctx
.cct
;
196 ldout(cct
, 5) << this << " " << __func__
<< dendl
;
198 auto it
= m_object_map
.begin();
199 auto end_it
= m_object_map
.end();
200 auto snap_it
= m_snap_object_map
.begin();
202 for (; it
!= end_it
; ++it
) {
203 if (*it
== OBJECT_EXISTS_CLEAN
&&
204 (i
>= m_snap_object_map
.size() ||
205 *snap_it
== OBJECT_EXISTS
)) {
208 if (i
< m_snap_object_map
.size()) {
216 } // namespace object_map
217 } // namespace librbd