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
|
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/operation/SnapshotRenameRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/ExclusiveLock.h"
#include "librbd/ImageCtx.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::SnapshotRenameRequest: "
namespace librbd {
namespace operation {
namespace {
template <typename I>
std::ostream& operator<<(std::ostream& os,
const typename SnapshotRenameRequest<I>::State& state) {
switch(state) {
case SnapshotRenameRequest<I>::STATE_RENAME_SNAP:
os << "RENAME_SNAP";
break;
}
return os;
}
} // anonymous namespace
template <typename I>
SnapshotRenameRequest<I>::SnapshotRenameRequest(I &image_ctx,
Context *on_finish,
uint64_t snap_id,
const std::string &snap_name)
: Request<I>(image_ctx, on_finish), m_snap_id(snap_id),
m_snap_name(snap_name), m_state(STATE_RENAME_SNAP) {
}
template <typename I>
journal::Event SnapshotRenameRequest<I>::create_event(uint64_t op_tid) const {
I &image_ctx = this->m_image_ctx;
ceph_assert(image_ctx.snap_lock.is_locked());
std::string src_snap_name;
auto snap_info_it = image_ctx.snap_info.find(m_snap_id);
if (snap_info_it != image_ctx.snap_info.end()) {
src_snap_name = snap_info_it->second.name;
}
return journal::SnapRenameEvent(op_tid, m_snap_id, src_snap_name,
m_snap_name);
}
template <typename I>
void SnapshotRenameRequest<I>::send_op() {
send_rename_snap();
}
template <typename I>
bool SnapshotRenameRequest<I>::should_complete(int r) {
I &image_ctx = this->m_image_ctx;
CephContext *cct = image_ctx.cct;
ldout(cct, 5) << this << " " << __func__ << ": state=" << m_state << ", "
<< "r=" << r << dendl;
if (r < 0) {
if (r == -EEXIST) {
ldout(cct, 1) << "snapshot already exists" << dendl;
} else {
lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
}
}
return true;
}
template <typename I>
void SnapshotRenameRequest<I>::send_rename_snap() {
I &image_ctx = this->m_image_ctx;
ceph_assert(image_ctx.owner_lock.is_locked());
RWLock::RLocker md_locker(image_ctx.md_lock);
RWLock::RLocker snap_locker(image_ctx.snap_lock);
CephContext *cct = image_ctx.cct;
ldout(cct, 5) << this << " " << __func__ << dendl;
librados::ObjectWriteOperation op;
if (image_ctx.old_format) {
cls_client::old_snapshot_rename(&op, m_snap_id, m_snap_name);
} else {
cls_client::snapshot_rename(&op, m_snap_id, m_snap_name);
}
librados::AioCompletion *rados_completion = this->create_callback_completion();
int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid,
rados_completion, &op);
ceph_assert(r == 0);
rados_completion->release();
}
} // namespace operation
} // namespace librbd
template class librbd::operation::SnapshotRenameRequest<librbd::ImageCtx>;
|
