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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "librbd/mirror/PromoteRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/ImageCtx.h"
#include "librbd/ImageState.h"
#include "librbd/Journal.h"
#include "librbd/Utils.h"
#include "librbd/mirror/GetInfoRequest.h"
#include "librbd/mirror/snapshot/PromoteRequest.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::mirror::PromoteRequest: " << this \
<< " " << __func__ << ": "
namespace librbd {
namespace mirror {
using librbd::util::create_context_callback;
template <typename I>
void PromoteRequest<I>::send() {
get_info();
}
template <typename I>
void PromoteRequest<I>::get_info() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << dendl;
auto ctx = create_context_callback<
PromoteRequest<I>, &PromoteRequest<I>::handle_get_info>(this);
auto req = GetInfoRequest<I>::create(m_image_ctx, &m_mirror_image,
&m_promotion_state,
&m_primary_mirror_uuid, ctx);
req->send();
}
template <typename I>
void PromoteRequest<I>::handle_get_info(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "failed to retrieve mirroring state: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
} else if (m_mirror_image.state != cls::rbd::MIRROR_IMAGE_STATE_ENABLED) {
lderr(cct) << "mirroring is not currently enabled" << dendl;
finish(-EINVAL);
return;
} else if (m_promotion_state == PROMOTION_STATE_PRIMARY) {
lderr(cct) << "image is already primary" << dendl;
finish(-EINVAL);
return;
} else if (m_promotion_state == PROMOTION_STATE_NON_PRIMARY && !m_force) {
lderr(cct) << "image is primary within a remote cluster or demotion is not propagated yet"
<< dendl;
finish(-EBUSY);
return;
}
promote();
}
template <typename I>
void PromoteRequest<I>::promote() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << dendl;
auto ctx = create_context_callback<
PromoteRequest<I>, &PromoteRequest<I>::handle_promote>(this);
if (m_mirror_image.mode == cls::rbd::MIRROR_IMAGE_MODE_JOURNAL) {
Journal<I>::promote(&m_image_ctx, ctx);
} else if (m_mirror_image.mode == cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT) {
auto req = mirror::snapshot::PromoteRequest<I>::create(
&m_image_ctx, m_mirror_image.global_image_id, ctx);
req->send();
} else {
lderr(cct) << "unknown image mirror mode: " << m_mirror_image.mode << dendl;
finish(-EOPNOTSUPP);
}
}
template <typename I>
void PromoteRequest<I>::handle_promote(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "failed to promote image: " << cpp_strerror(r)
<< dendl;
}
finish(r);
}
template <typename I>
void PromoteRequest<I>::finish(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 20) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace mirror
} // namespace librbd
template class librbd::mirror::PromoteRequest<librbd::ImageCtx>;
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