1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #include "librbd/operation/SnapshotRenameRequest.h"
5 #include "common/dout.h"
6 #include "common/errno.h"
7 #include "librbd/ExclusiveLock.h"
8 #include "librbd/ImageCtx.h"
10 #define dout_subsys ceph_subsys_rbd
12 #define dout_prefix *_dout << "librbd::SnapshotRenameRequest: "
20 std::ostream& operator<<(std::ostream& os,
21 const typename SnapshotRenameRequest<I>::State& state) {
23 case SnapshotRenameRequest<I>::STATE_RENAME_SNAP:
30 } // anonymous namespace
33 SnapshotRenameRequest<I>::SnapshotRenameRequest(I &image_ctx,
36 const std::string &snap_name)
37 : Request<I>(image_ctx, on_finish), m_snap_id(snap_id), m_snap_name(snap_name) {
41 journal::Event SnapshotRenameRequest<I>::create_event(uint64_t op_tid) const {
42 I &image_ctx = this->m_image_ctx;
43 assert(image_ctx.snap_lock.is_locked());
45 std::string src_snap_name;
46 auto snap_info_it = image_ctx.snap_info.find(m_snap_id);
47 if (snap_info_it != image_ctx.snap_info.end()) {
48 src_snap_name = snap_info_it->second.name;
51 return journal::SnapRenameEvent(op_tid, m_snap_id, src_snap_name,
56 void SnapshotRenameRequest<I>::send_op() {
61 bool SnapshotRenameRequest<I>::should_complete(int r) {
62 I &image_ctx = this->m_image_ctx;
63 CephContext *cct = image_ctx.cct;
64 ldout(cct, 5) << this << " " << __func__ << ": state=" << m_state << ", "
65 << "r=" << r << dendl;
68 ldout(cct, 1) << "snapshot already exists" << dendl;
70 lderr(cct) << "encountered error: " << cpp_strerror(r) << dendl;
77 void SnapshotRenameRequest<I>::send_rename_snap() {
78 I &image_ctx = this->m_image_ctx;
79 assert(image_ctx.owner_lock.is_locked());
80 RWLock::RLocker md_locker(image_ctx.md_lock);
81 RWLock::RLocker snap_locker(image_ctx.snap_lock);
83 CephContext *cct = image_ctx.cct;
84 ldout(cct, 5) << this << " " << __func__ << dendl;
86 m_state = STATE_RENAME_SNAP;
88 librados::ObjectWriteOperation op;
89 if (image_ctx.old_format) {
90 cls_client::old_snapshot_rename(&op, m_snap_id, m_snap_name);
92 cls_client::snapshot_rename(&op, m_snap_id, m_snap_name);
95 librados::AioCompletion *rados_completion = this->create_callback_completion();
96 int r = image_ctx.md_ctx.aio_operate(image_ctx.header_oid,
97 rados_completion, &op);
99 rados_completion->release();
102 } // namespace operation
103 } // namespace librbd
105 template class librbd::operation::SnapshotRenameRequest<librbd::ImageCtx>;