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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "common/dout.h"
#include "common/errno.h"
#include "include/ceph_assert.h"
#include "librbd/Utils.h"
#include "common/Timer.h"
#include "common/WorkQueue.h"
#include "journal/Settings.h"
#include "librbd/journal/CreateRequest.h"
#include "librbd/journal/RemoveRequest.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::Journal::CreateRequest: "
namespace librbd {
using util::create_context_callback;
namespace journal {
template<typename I>
CreateRequest<I>::CreateRequest(IoCtx &ioctx, const std::string &imageid,
uint8_t order, uint8_t splay_width,
const std::string &object_pool,
uint64_t tag_class, TagData &tag_data,
const std::string &client_id,
ContextWQ *op_work_queue,
Context *on_finish)
: m_ioctx(ioctx), m_image_id(imageid), m_order(order),
m_splay_width(splay_width), m_object_pool(object_pool),
m_tag_class(tag_class), m_tag_data(tag_data), m_image_client_id(client_id),
m_op_work_queue(op_work_queue), m_on_finish(on_finish) {
m_cct = reinterpret_cast<CephContext *>(m_ioctx.cct());
}
template<typename I>
void CreateRequest<I>::send() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
if (m_order > 64 || m_order < 12) {
lderr(m_cct) << "order must be in the range [12, 64]" << dendl;
complete(-EDOM);
return;
}
if (m_splay_width == 0) {
complete(-EINVAL);
return;
}
get_pool_id();
}
template<typename I>
void CreateRequest<I>::get_pool_id() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
if (m_object_pool.empty()) {
create_journal();
return;
}
librados::Rados rados(m_ioctx);
IoCtx data_ioctx;
int r = rados.ioctx_create(m_object_pool.c_str(), data_ioctx);
if (r != 0) {
lderr(m_cct) << "failed to create journal: "
<< "error opening journal object pool '" << m_object_pool
<< "': " << cpp_strerror(r) << dendl;
complete(r);
return;
}
data_ioctx.set_namespace(m_ioctx.get_namespace());
m_pool_id = data_ioctx.get_id();
create_journal();
}
template<typename I>
void CreateRequest<I>::create_journal() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
ImageCtx::get_timer_instance(m_cct, &m_timer, &m_timer_lock);
m_journaler = new Journaler(m_op_work_queue, m_timer, m_timer_lock,
m_ioctx, m_image_id, m_image_client_id, {});
using klass = CreateRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_create_journal>(this);
m_journaler->create(m_order, m_splay_width, m_pool_id, ctx);
}
template<typename I>
Context *CreateRequest<I>::handle_create_journal(int *result) {
ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
if (*result < 0) {
lderr(m_cct) << "failed to create journal: " << cpp_strerror(*result) << dendl;
shut_down_journaler(*result);
return nullptr;
}
allocate_journal_tag();
return nullptr;
}
template<typename I>
void CreateRequest<I>::allocate_journal_tag() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
using klass = CreateRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_journal_tag>(this);
encode(m_tag_data, m_bl);
m_journaler->allocate_tag(m_tag_class, m_bl, &m_tag, ctx);
}
template<typename I>
Context *CreateRequest<I>::handle_journal_tag(int *result) {
ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
if (*result < 0) {
lderr(m_cct) << "failed to allocate tag: " << cpp_strerror(*result) << dendl;
shut_down_journaler(*result);
return nullptr;
}
register_client();
return nullptr;
}
template<typename I>
void CreateRequest<I>::register_client() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
m_bl.clear();
encode(ClientData{ImageClientMeta{m_tag.tag_class}}, m_bl);
using klass = CreateRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_register_client>(this);
m_journaler->register_client(m_bl, ctx);
}
template<typename I>
Context *CreateRequest<I>::handle_register_client(int *result) {
ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
if (*result < 0) {
lderr(m_cct) << "failed to register client: " << cpp_strerror(*result) << dendl;
}
shut_down_journaler(*result);
return nullptr;
}
template<typename I>
void CreateRequest<I>::shut_down_journaler(int r) {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
m_r_saved = r;
using klass = CreateRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_journaler_shutdown>(this);
m_journaler->shut_down(ctx);
}
template<typename I>
Context *CreateRequest<I>::handle_journaler_shutdown(int *result) {
ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
if (*result < 0) {
lderr(m_cct) << "failed to shut down journaler: " << cpp_strerror(*result) << dendl;
}
delete m_journaler;
if (!m_r_saved) {
complete(0);
return nullptr;
}
// there was an error during journal creation, so we rollback
// what ever was done. the easiest way to do this is to invoke
// journal remove state machine, although it's not the most
// cleanest approach when it comes to redundancy, but that's
// ok during the failure path.
remove_journal();
return nullptr;
}
template<typename I>
void CreateRequest<I>::remove_journal() {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
using klass = CreateRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_remove_journal>(this);
RemoveRequest<I> *req = RemoveRequest<I>::create(
m_ioctx, m_image_id, m_image_client_id, m_op_work_queue, ctx);
req->send();
}
template<typename I>
Context *CreateRequest<I>::handle_remove_journal(int *result) {
ldout(m_cct, 20) << __func__ << ": r=" << *result << dendl;
if (*result < 0) {
lderr(m_cct) << "error cleaning up journal after creation failed: "
<< cpp_strerror(*result) << dendl;
}
complete(m_r_saved);
return nullptr;
}
template<typename I>
void CreateRequest<I>::complete(int r) {
ldout(m_cct, 20) << this << " " << __func__ << dendl;
if (r == 0) {
ldout(m_cct, 20) << "done." << dendl;
}
m_on_finish->complete(r);
delete this;
}
} // namespace journal
} // namespace librbd
template class librbd::journal::CreateRequest<librbd::ImageCtx>;
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