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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/GetUuidRequest.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::mirror::GetUuidRequest: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace mirror {
using librbd::util::create_rados_callback;
template <typename I>
GetUuidRequest<I>::GetUuidRequest(
librados::IoCtx& io_ctx, std::string* mirror_uuid, Context* on_finish)
: m_mirror_uuid(mirror_uuid), m_on_finish(on_finish),
m_cct(reinterpret_cast<CephContext*>(io_ctx.cct())) {
m_io_ctx.dup(io_ctx);
m_io_ctx.set_namespace("");
}
template <typename I>
void GetUuidRequest<I>::send() {
get_mirror_uuid();
}
template <typename I>
void GetUuidRequest<I>::get_mirror_uuid() {
ldout(m_cct, 20) << dendl;
librados::ObjectReadOperation op;
librbd::cls_client::mirror_uuid_get_start(&op);
auto aio_comp = create_rados_callback<
GetUuidRequest<I>, &GetUuidRequest<I>::handle_get_mirror_uuid>(this);
int r = m_io_ctx.aio_operate(RBD_MIRRORING, aio_comp, &op, &m_out_bl);
ceph_assert(r == 0);
aio_comp->release();
}
template <typename I>
void GetUuidRequest<I>::handle_get_mirror_uuid(int r) {
ldout(m_cct, 20) << "r=" << r << dendl;
if (r >= 0) {
auto it = m_out_bl.cbegin();
r = librbd::cls_client::mirror_uuid_get_finish(&it, m_mirror_uuid);
if (r >= 0 && m_mirror_uuid->empty()) {
r = -ENOENT;
}
}
if (r < 0) {
if (r == -ENOENT) {
ldout(m_cct, 5) << "mirror uuid missing" << dendl;
} else {
lderr(m_cct) << "failed to retrieve mirror uuid: " << cpp_strerror(r)
<< dendl;
}
*m_mirror_uuid = "";
}
finish(r);
}
template <typename I>
void GetUuidRequest<I>::finish(int r) {
ldout(m_cct, 20) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace mirror
} // namespace librbd
template class librbd::mirror::GetUuidRequest<librbd::ImageCtx>;
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