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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/image/AttachParentRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "cls/rbd/cls_rbd_client.h"
#include "librbd/ImageCtx.h"
#include "librbd/Utils.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::image::AttachParentRequest: " << this \
<< " " << __func__ << ": "
namespace librbd {
namespace image {
using util::create_rados_callback;
template <typename I>
void AttachParentRequest<I>::send() {
attach_parent();
}
template <typename I>
void AttachParentRequest<I>::attach_parent() {
auto cct = m_image_ctx.cct;
ldout(cct, 5) << "parent_image_spec=" << m_parent_image_spec << dendl;
librados::ObjectWriteOperation op;
if (!m_legacy_parent) {
librbd::cls_client::parent_attach(&op, m_parent_image_spec,
m_parent_overlap, m_reattach);
} else {
librbd::cls_client::set_parent(&op, m_parent_image_spec, m_parent_overlap);
}
auto aio_comp = create_rados_callback<
AttachParentRequest<I>,
&AttachParentRequest<I>::handle_attach_parent>(this);
int r = m_image_ctx.md_ctx.aio_operate(m_image_ctx.header_oid, aio_comp, &op);
ceph_assert(r == 0);
aio_comp->release();
}
template <typename I>
void AttachParentRequest<I>::handle_attach_parent(int r) {
auto cct = m_image_ctx.cct;
ldout(cct, 5) << dendl;
if (!m_legacy_parent && r == -EOPNOTSUPP && !m_reattach) {
if (m_parent_image_spec.pool_namespace ==
m_image_ctx.md_ctx.get_namespace()) {
m_parent_image_spec.pool_namespace = "";
}
if (m_parent_image_spec.pool_namespace.empty()) {
ldout(cct, 10) << "retrying using legacy parent method" << dendl;
m_legacy_parent = true;
attach_parent();
return;
}
// namespaces require newer OSDs
r = -EXDEV;
}
if (r < 0) {
lderr(cct) << "attach parent encountered an error: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
finish(0);
}
template <typename I>
void AttachParentRequest<I>::finish(int r) {
auto cct = m_image_ctx.cct;
ldout(cct, 5) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace image
} // namespace librbd
template class librbd::image::AttachParentRequest<librbd::ImageCtx>;
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