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
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/mirror/ImageStateUpdateRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/MirroringWatcher.h"
#include "librbd/Utils.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::mirror::ImageStateUpdateRequest: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace mirror {
using util::create_rados_callback;
template <typename I>
ImageStateUpdateRequest<I>::ImageStateUpdateRequest(
librados::IoCtx& io_ctx,
const std::string& image_id,
cls::rbd::MirrorImageState mirror_image_state,
const cls::rbd::MirrorImage& mirror_image,
Context* on_finish)
: m_io_ctx(io_ctx), m_image_id(image_id),
m_mirror_image_state(mirror_image_state), m_mirror_image(mirror_image),
m_on_finish(on_finish), m_cct(static_cast<CephContext*>(m_io_ctx.cct())) {
ceph_assert(m_mirror_image_state != cls::rbd::MIRROR_IMAGE_STATE_DISABLED);
}
template <typename I>
void ImageStateUpdateRequest<I>::send() {
get_mirror_image();
}
template <typename I>
void ImageStateUpdateRequest<I>::get_mirror_image() {
if (!m_mirror_image.global_image_id.empty()) {
set_mirror_image();
return;
}
ldout(m_cct, 10) << dendl;
librados::ObjectReadOperation op;
cls_client::mirror_image_get_start(&op, m_image_id);
auto comp = create_rados_callback<
ImageStateUpdateRequest<I>,
&ImageStateUpdateRequest<I>::handle_get_mirror_image>(this);
int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op, &m_out_bl);
ceph_assert(r == 0);
comp->release();
}
template <typename I>
void ImageStateUpdateRequest<I>::handle_get_mirror_image(int r) {
ldout(m_cct, 10) << "r=" << r << dendl;
if (r == 0) {
auto iter = m_out_bl.cbegin();
r = cls_client::mirror_image_get_finish(&iter, &m_mirror_image);
}
if (r == -ENOENT) {
ldout(m_cct, 20) << "mirroring is disabled" << dendl;
finish(0);
return;
} else if (r < 0) {
lderr(m_cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
set_mirror_image();
}
template <typename I>
void ImageStateUpdateRequest<I>::set_mirror_image() {
if (m_mirror_image.state == m_mirror_image_state) {
finish(0);
return;
}
ldout(m_cct, 10) << dendl;
m_mirror_image.state = m_mirror_image_state;
librados::ObjectWriteOperation op;
cls_client::mirror_image_set(&op, m_image_id, m_mirror_image);
auto comp = create_rados_callback<
ImageStateUpdateRequest<I>,
&ImageStateUpdateRequest<I>::handle_set_mirror_image>(this);
int r = m_io_ctx.aio_operate(RBD_MIRRORING, comp, &op);
ceph_assert(r == 0);
comp->release();
}
template <typename I>
void ImageStateUpdateRequest<I>::handle_set_mirror_image(int r) {
ldout(m_cct, 10) << "r=" << r << dendl;
if (r < 0) {
lderr(m_cct) << "failed to disable mirroring image: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
notify_mirroring_watcher();
}
template <typename I>
void ImageStateUpdateRequest<I>::notify_mirroring_watcher() {
ldout(m_cct, 10) << dendl;
auto ctx = util::create_context_callback<
ImageStateUpdateRequest<I>,
&ImageStateUpdateRequest<I>::handle_notify_mirroring_watcher>(this);
MirroringWatcher<I>::notify_image_updated(
m_io_ctx, m_mirror_image_state, m_image_id, m_mirror_image.global_image_id,
ctx);
}
template <typename I>
void ImageStateUpdateRequest<I>::handle_notify_mirroring_watcher(int r) {
ldout(m_cct, 10) << "r=" << r << dendl;
if (r < 0) {
lderr(m_cct) << "failed to notify mirror image update: " << cpp_strerror(r)
<< dendl;
}
finish(0);
}
template <typename I>
void ImageStateUpdateRequest<I>::finish(int r) {
ldout(m_cct, 10) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace mirror
} // namespace librbd
template class librbd::mirror::ImageStateUpdateRequest<librbd::ImageCtx>;
|
