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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "MetadataCopyRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/Utils.h"
#include "librbd/image/GetMetadataRequest.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::deep_copy::MetadataCopyRequest: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace deep_copy {
namespace {
const uint64_t MAX_METADATA_ITEMS = 128;
} // anonymous namespace
using librbd::util::create_context_callback;
using librbd::util::create_rados_callback;
template <typename I>
MetadataCopyRequest<I>::MetadataCopyRequest(I *src_image_ctx, I *dst_image_ctx,
Context *on_finish)
: m_src_image_ctx(src_image_ctx), m_dst_image_ctx(dst_image_ctx),
m_on_finish(on_finish), m_cct(dst_image_ctx->cct) {
}
template <typename I>
void MetadataCopyRequest<I>::send() {
list_src_metadata();
}
template <typename I>
void MetadataCopyRequest<I>::list_src_metadata() {
ldout(m_cct, 20) << "start_key=" << m_last_metadata_key << dendl;
m_metadata.clear();
auto ctx = create_context_callback<
MetadataCopyRequest<I>,
&MetadataCopyRequest<I>::handle_list_src_metadata>(this);
auto req = image::GetMetadataRequest<I>::create(
m_src_image_ctx->md_ctx, m_src_image_ctx->header_oid, true, "",
m_last_metadata_key, MAX_METADATA_ITEMS, &m_metadata, ctx);
req->send();
}
template <typename I>
void MetadataCopyRequest<I>::handle_list_src_metadata(int r) {
ldout(m_cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(m_cct) << "failed to retrieve metadata: " << cpp_strerror(r) << dendl;
finish(r);
return;
}
if (m_metadata.empty()) {
finish(0);
return;
}
m_last_metadata_key = m_metadata.rbegin()->first;
m_more_metadata = (m_metadata.size() >= MAX_METADATA_ITEMS);
set_dst_metadata();
}
template <typename I>
void MetadataCopyRequest<I>::set_dst_metadata() {
ldout(m_cct, 20) << "count=" << m_metadata.size() << dendl;
librados::ObjectWriteOperation op;
librbd::cls_client::metadata_set(&op, m_metadata);
librados::AioCompletion *aio_comp = create_rados_callback<
MetadataCopyRequest<I>,
&MetadataCopyRequest<I>::handle_set_dst_metadata>(this);
m_dst_image_ctx->md_ctx.aio_operate(m_dst_image_ctx->header_oid, aio_comp,
&op);
aio_comp->release();
}
template <typename I>
void MetadataCopyRequest<I>::handle_set_dst_metadata(int r) {
ldout(m_cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(m_cct) << "failed to set metadata: " << cpp_strerror(r) << dendl;
finish(r);
return;
}
if (m_more_metadata) {
list_src_metadata();
return;
}
finish(0);
}
template <typename I>
void MetadataCopyRequest<I>::finish(int r) {
ldout(m_cct, 20) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace deep_copy
} // namespace librbd
template class librbd::deep_copy::MetadataCopyRequest<librbd::ImageCtx>;
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