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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/journal/OpenRequest.h"
#include "common/dout.h"
#include "common/errno.h"
#include "journal/Journaler.h"
#include "librbd/ImageCtx.h"
#include "librbd/Journal.h"
#include "librbd/Utils.h"
#include "librbd/asio/ContextWQ.h"
#include "librbd/journal/Types.h"
#include "librbd/journal/Utils.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::journal::OpenRequest: " << this << " " \
<< __func__ << ": "
namespace librbd {
namespace journal {
using librbd::util::create_async_context_callback;
using librbd::util::create_context_callback;
using util::C_DecodeTags;
template <typename I>
OpenRequest<I>::OpenRequest(I *image_ctx, Journaler *journaler, ceph::mutex *lock,
journal::ImageClientMeta *client_meta,
uint64_t *tag_tid, journal::TagData *tag_data,
Context *on_finish)
: m_image_ctx(image_ctx), m_journaler(journaler), m_lock(lock),
m_client_meta(client_meta), m_tag_tid(tag_tid), m_tag_data(tag_data),
m_on_finish(on_finish) {
}
template <typename I>
void OpenRequest<I>::send() {
send_init();
}
template <typename I>
void OpenRequest<I>::send_init() {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
m_journaler->init(create_async_context_callback(
*m_image_ctx, create_context_callback<
OpenRequest<I>, &OpenRequest<I>::handle_init>(this)));
}
template <typename I>
void OpenRequest<I>::handle_init(int r) {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "failed to initialize journal: " << cpp_strerror(r)
<< dendl;
finish(r);
return;
}
// locate the master image client record
cls::journal::Client client;
r = m_journaler->get_cached_client(Journal<ImageCtx>::IMAGE_CLIENT_ID,
&client);
if (r < 0) {
lderr(cct) << "failed to locate master image client" << dendl;
finish(r);
return;
}
librbd::journal::ClientData client_data;
auto bl = client.data.cbegin();
try {
decode(client_data, bl);
} catch (const buffer::error &err) {
lderr(cct) << "failed to decode client meta data: " << err.what()
<< dendl;
finish(-EINVAL);
return;
}
journal::ImageClientMeta *image_client_meta =
boost::get<journal::ImageClientMeta>(&client_data.client_meta);
if (image_client_meta == nullptr) {
lderr(cct) << this << " " << __func__ << ": "
<< "failed to extract client meta data" << dendl;
finish(-EINVAL);
return;
}
ldout(cct, 20) << this << " " << __func__ << ": "
<< "client: " << client << ", "
<< "image meta: " << *image_client_meta << dendl;
m_tag_class = image_client_meta->tag_class;
{
std::lock_guard locker{*m_lock};
*m_client_meta = *image_client_meta;
}
send_get_tags();
}
template <typename I>
void OpenRequest<I>::send_get_tags() {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
C_DecodeTags *tags_ctx = new C_DecodeTags(
cct, m_lock, m_tag_tid, m_tag_data, create_async_context_callback(
*m_image_ctx, create_context_callback<
OpenRequest<I>, &OpenRequest<I>::handle_get_tags>(this)));
m_journaler->get_tags(m_tag_class, &tags_ctx->tags, tags_ctx);
}
template <typename I>
void OpenRequest<I>::handle_get_tags(int r) {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 20) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << this << " " << __func__ << ": "
<< "failed to decode journal tags: " << cpp_strerror(r) << dendl;
}
finish(r);
}
template <typename I>
void OpenRequest<I>::finish(int r) {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 20) << "r=" << r << dendl;
m_on_finish->complete(r);
delete this;
}
} // namespace journal
} // namespace librbd
template class librbd::journal::OpenRequest<librbd::ImageCtx>;
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