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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "tools/rbd_mirror/image_replayer/PrepareLocalImageRequest.h"
#include "include/rados/librados.hpp"
#include "cls/rbd/cls_rbd_client.h"
#include "common/debug.h"
#include "common/errno.h"
#include "librbd/ImageCtx.h"
#include "librbd/Journal.h"
#include "librbd/Utils.h"
#include "librbd/mirror/GetInfoRequest.h"
#include "tools/rbd_mirror/ImageDeleter.h"
#include "tools/rbd_mirror/Threads.h"
#include "tools/rbd_mirror/image_replayer/GetMirrorImageIdRequest.h"
#include "tools/rbd_mirror/image_replayer/journal/StateBuilder.h"
#include "tools/rbd_mirror/image_replayer/snapshot/StateBuilder.h"
#include <type_traits>
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_rbd_mirror
#undef dout_prefix
#define dout_prefix *_dout << "rbd::mirror::image_replayer::" \
<< "PrepareLocalImageRequest: " << this << " " \
<< __func__ << ": "
namespace rbd {
namespace mirror {
namespace image_replayer {
using librbd::util::create_context_callback;
using librbd::util::create_rados_callback;
template <typename I>
void PrepareLocalImageRequest<I>::send() {
dout(10) << dendl;
get_local_image_id();
}
template <typename I>
void PrepareLocalImageRequest<I>::get_local_image_id() {
dout(10) << dendl;
Context *ctx = create_context_callback<
PrepareLocalImageRequest<I>,
&PrepareLocalImageRequest<I>::handle_get_local_image_id>(this);
auto req = GetMirrorImageIdRequest<I>::create(m_io_ctx, m_global_image_id,
&m_local_image_id, ctx);
req->send();
}
template <typename I>
void PrepareLocalImageRequest<I>::handle_get_local_image_id(int r) {
dout(10) << "r=" << r << ", "
<< "local_image_id=" << m_local_image_id << dendl;
if (r < 0) {
finish(r);
return;
}
get_local_image_name();
}
template <typename I>
void PrepareLocalImageRequest<I>::get_local_image_name() {
dout(10) << dendl;
librados::ObjectReadOperation op;
librbd::cls_client::dir_get_name_start(&op, m_local_image_id);
m_out_bl.clear();
librados::AioCompletion *aio_comp = create_rados_callback<
PrepareLocalImageRequest<I>,
&PrepareLocalImageRequest<I>::handle_get_local_image_name>(this);
int r = m_io_ctx.aio_operate(RBD_DIRECTORY, aio_comp, &op, &m_out_bl);
ceph_assert(r == 0);
aio_comp->release();
}
template <typename I>
void PrepareLocalImageRequest<I>::handle_get_local_image_name(int r) {
dout(10) << "r=" << r << dendl;
if (r == 0) {
auto it = m_out_bl.cbegin();
r = librbd::cls_client::dir_get_name_finish(&it, m_local_image_name);
}
if (r == -ENOENT) {
// proceed we should have a mirror image record if we got this far
dout(10) << "image does not exist for local image id " << m_local_image_id
<< dendl;
*m_local_image_name = "";
} else if (r < 0) {
derr << "failed to retrieve image name: " << cpp_strerror(r) << dendl;
finish(r);
return;
}
get_mirror_info();
}
template <typename I>
void PrepareLocalImageRequest<I>::get_mirror_info() {
dout(10) << dendl;
auto ctx = create_context_callback<
PrepareLocalImageRequest<I>,
&PrepareLocalImageRequest<I>::handle_get_mirror_info>(this);
auto req = librbd::mirror::GetInfoRequest<I>::create(
m_io_ctx, m_work_queue, m_local_image_id, &m_mirror_image,
&m_promotion_state, &m_primary_mirror_uuid, ctx);
req->send();
}
template <typename I>
void PrepareLocalImageRequest<I>::handle_get_mirror_info(int r) {
dout(10) << ": r=" << r << dendl;
if (r < 0) {
derr << "failed to retrieve local mirror image info: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
if (m_mirror_image.state == cls::rbd::MIRROR_IMAGE_STATE_CREATING) {
dout(5) << "local image is still in creating state, issuing a removal"
<< dendl;
move_to_trash();
return;
} else if (m_mirror_image.state == cls::rbd::MIRROR_IMAGE_STATE_DISABLING) {
dout(5) << "local image mirroring is in disabling state" << dendl;
finish(-ERESTART);
return;
}
switch (m_mirror_image.mode) {
case cls::rbd::MIRROR_IMAGE_MODE_JOURNAL:
// journal-based local image exists
{
auto state_builder = journal::StateBuilder<I>::create(m_global_image_id);
state_builder->local_primary_mirror_uuid = m_primary_mirror_uuid;
*m_state_builder = state_builder;
}
break;
case cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT:
// snapshot-based local image exists
*m_state_builder = snapshot::StateBuilder<I>::create(m_global_image_id);
break;
default:
derr << "unsupported mirror image mode " << m_mirror_image.mode << " "
<< "for image " << m_global_image_id << dendl;
finish(-EOPNOTSUPP);
break;
}
dout(10) << "local_image_id=" << m_local_image_id << ", "
<< "local_promotion_state=" << m_promotion_state << ", "
<< "local_primary_mirror_uuid=" << m_primary_mirror_uuid << dendl;
(*m_state_builder)->local_image_id = m_local_image_id;
(*m_state_builder)->local_promotion_state = m_promotion_state;
finish(0);
}
template <typename I>
void PrepareLocalImageRequest<I>::move_to_trash() {
dout(10) << dendl;
Context *ctx = create_context_callback<
PrepareLocalImageRequest<I>,
&PrepareLocalImageRequest<I>::handle_move_to_trash>(this);
ImageDeleter<I>::trash_move(m_io_ctx, m_global_image_id,
false, m_work_queue, ctx);
}
template <typename I>
void PrepareLocalImageRequest<I>::handle_move_to_trash(int r) {
dout(10) << ": r=" << r << dendl;
finish(-ENOENT);
}
template <typename I>
void PrepareLocalImageRequest<I>::finish(int r) {
dout(10) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace image_replayer
} // namespace mirror
} // namespace rbd
template class rbd::mirror::image_replayer::PrepareLocalImageRequest<librbd::ImageCtx>;
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