1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H
#define CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H
#include "include/int_types.h"
#include "include/buffer.h"
#include "include/utime.h"
#include "common/snap_types.h"
#include "cls/lock/cls_lock_types.h"
#include "librbd/ImageCtx.h"
#include "librbd/Types.h"
#include <string>
#include <vector>
class Context;
namespace librbd {
class ImageCtx;
namespace image {
template<typename> class RefreshParentRequest;
template<typename ImageCtxT = ImageCtx>
class RefreshRequest {
public:
static constexpr int MAX_ENOENT_RETRIES = 10;
static RefreshRequest *create(ImageCtxT &image_ctx, bool acquiring_lock,
bool skip_open_parent, Context *on_finish) {
return new RefreshRequest(image_ctx, acquiring_lock, skip_open_parent,
on_finish);
}
RefreshRequest(ImageCtxT &image_ctx, bool acquiring_lock,
bool skip_open_parent, Context *on_finish);
~RefreshRequest();
void send();
private:
/**
* @verbatim
*
* <start> < * * * * * * * * * * * * * * * * * * * * * * * * * * (ENOENT)
* ^ | *
* * | (v1) *
* * |-----> V1_READ_HEADER -------------> GET_MIGRATION_HEADER (skip if not
* * | | migrating)
* * | (v2) v
* * \-----> V2_GET_MUTABLE_METADATA V1_GET_SNAPSHOTS
* * * | |
* * * | -EOPNOTSUPP v
* * * | * * * V1_GET_LOCKS
* * * | * * |
* * * v v * v
* * * V2_GET_PARENT <apply>
* * * | |
* * v |
* * * * * * GET_MIGRATION_HEADER (skip if not |
* (ENOENT) | migrating) |
* v |
* * V2_GET_METADATA |
* * | |
* * v |
* * V2_GET_POOL_METADATA |
* * | |
* * v (skip if not enabled) |
* * V2_GET_OP_FEATURES |
* * | |
* * v |
* * V2_GET_GROUP |
* * | |
* * | -EOPNOTSUPP |
* * | * * * |
* * | * * |
* * v v * |
* * * V2_GET_SNAPSHOTS (skip if no snaps) |
* (ENOENT) | |
* * v |
* * * V2_REFRESH_PARENT (skip if no parent or |
* (ENOENT) | refresh not needed) |
* v |
* V2_INIT_EXCLUSIVE_LOCK (skip if lock |
* | active or disabled) |
* v |
* V2_OPEN_OBJECT_MAP (skip if map |
* | active or disabled) |
* v |
* V2_OPEN_JOURNAL (skip if journal |
* | active or disabled) |
* v |
* V2_BLOCK_WRITES (skip if journal not |
* | disabled) |
* v |
* <apply> |
* | |
* v |
* V2_FINALIZE_REFRESH_PARENT (skip if refresh |
* | not needed) |
* (error) v |
* * * * * > V2_SHUT_DOWN_EXCLUSIVE_LOCK (skip if lock |
* | active or enabled) |
* v |
* V2_CLOSE_JOURNAL (skip if journal inactive |
* | or enabled) |
* v |
* V2_CLOSE_OBJECT_MAP (skip if map inactive |
* | or enabled) |
* | |
* \-------------------\/--------------------/
* |
* v
* FLUSH (skip if no new
* | snapshots)
* v
* <finish>
*
* @endverbatim
*/
enum LegacySnapshot {
LEGACY_SNAPSHOT_DISABLED,
LEGACY_SNAPSHOT_ENABLED,
LEGACY_SNAPSHOT_ENABLED_NO_TIMESTAMP
};
ImageCtxT &m_image_ctx;
bool m_acquiring_lock;
bool m_skip_open_parent_image;
Context *m_on_finish;
cls::rbd::MigrationSpec m_migration_spec;
int m_error_result;
bool m_flush_aio;
decltype(m_image_ctx.exclusive_lock) m_exclusive_lock;
decltype(m_image_ctx.object_map) m_object_map;
decltype(m_image_ctx.journal) m_journal;
RefreshParentRequest<ImageCtxT> *m_refresh_parent;
bufferlist m_out_bl;
bool m_legacy_parent = false;
LegacySnapshot m_legacy_snapshot = LEGACY_SNAPSHOT_DISABLED;
int m_enoent_retries = 0;
uint8_t m_order = 0;
uint64_t m_size = 0;
uint64_t m_features = 0;
uint64_t m_incompatible_features = 0;
uint64_t m_flags = 0;
uint64_t m_op_features = 0;
uint32_t m_read_only_flags = 0U;
bool m_read_only = false;
librados::IoCtx m_pool_metadata_io_ctx;
std::map<std::string, bufferlist> m_metadata;
std::string m_object_prefix;
ParentImageInfo m_parent_md;
bool m_head_parent_overlap = false;
cls::rbd::GroupSpec m_group_spec;
::SnapContext m_snapc;
std::vector<cls::rbd::SnapshotInfo> m_snap_infos;
std::vector<ParentImageInfo> m_snap_parents;
std::vector<uint8_t> m_snap_protection;
std::vector<uint64_t> m_snap_flags;
std::map<rados::cls::lock::locker_id_t,
rados::cls::lock::locker_info_t> m_lockers;
std::string m_lock_tag;
bool m_exclusive_locked = false;
bool m_blocked_writes = false;
bool m_incomplete_update = false;
void send_get_migration_header();
Context *handle_get_migration_header(int *result);
void send_v1_read_header();
Context *handle_v1_read_header(int *result);
void send_v1_get_snapshots();
Context *handle_v1_get_snapshots(int *result);
void send_v1_get_locks();
Context *handle_v1_get_locks(int *result);
void send_v1_apply();
Context *handle_v1_apply(int *result);
void send_v2_get_mutable_metadata();
Context *handle_v2_get_mutable_metadata(int *result);
void send_v2_get_parent();
Context *handle_v2_get_parent(int *result);
void send_v2_get_metadata();
Context *handle_v2_get_metadata(int *result);
void send_v2_get_pool_metadata();
Context *handle_v2_get_pool_metadata(int *result);
void send_v2_get_op_features();
Context *handle_v2_get_op_features(int *result);
void send_v2_get_group();
Context *handle_v2_get_group(int *result);
void send_v2_get_snapshots();
Context *handle_v2_get_snapshots(int *result);
void send_v2_get_snapshots_legacy();
Context *handle_v2_get_snapshots_legacy(int *result);
void send_v2_refresh_parent();
Context *handle_v2_refresh_parent(int *result);
void send_v2_init_exclusive_lock();
Context *handle_v2_init_exclusive_lock(int *result);
void send_v2_open_journal();
Context *handle_v2_open_journal(int *result);
void send_v2_block_writes();
Context *handle_v2_block_writes(int *result);
void send_v2_open_object_map();
Context *handle_v2_open_object_map(int *result);
void send_v2_apply();
Context *handle_v2_apply(int *result);
Context *send_v2_finalize_refresh_parent();
Context *handle_v2_finalize_refresh_parent(int *result);
Context *send_v2_shut_down_exclusive_lock();
Context *handle_v2_shut_down_exclusive_lock(int *result);
Context *send_v2_close_journal();
Context *handle_v2_close_journal(int *result);
Context *send_v2_close_object_map();
Context *handle_v2_close_object_map(int *result);
Context *send_flush_aio();
Context *handle_flush_aio(int *result);
Context *handle_error(int *result);
void save_result(int *result) {
if (m_error_result == 0 && *result < 0) {
m_error_result = *result;
}
}
void apply();
int get_parent_info(uint64_t snap_id, ParentImageInfo *parent_md,
MigrationInfo *migration_info);
int get_migration_info(ParentImageInfo *parent_md,
MigrationInfo *migration_info,
bool* migration_info_valid);
};
} // namespace image
} // namespace librbd
extern template class librbd::image::RefreshRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_IMAGE_REFRESH_REQUEST_H
|
