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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/exclusive_lock/PreAcquireRequest.h"
#include "librbd/Utils.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/ImageCtx.h"
#include "librbd/ImageWatcher.h"
#include "librbd/ImageState.h"
#include "librbd/asio/ContextWQ.h"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::exclusive_lock::PreAcquireRequest: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace exclusive_lock {
using util::create_async_context_callback;
using util::create_context_callback;
using util::create_rados_callback;
template <typename I>
PreAcquireRequest<I>* PreAcquireRequest<I>::create(I &image_ctx,
Context *on_finish) {
return new PreAcquireRequest(image_ctx, on_finish);
}
template <typename I>
PreAcquireRequest<I>::PreAcquireRequest(I &image_ctx, Context *on_finish)
: m_image_ctx(image_ctx),
m_on_finish(create_async_context_callback(image_ctx, on_finish)),
m_error_result(0) {
}
template <typename I>
PreAcquireRequest<I>::~PreAcquireRequest() {
}
template <typename I>
void PreAcquireRequest<I>::send() {
send_prepare_lock();
}
template <typename I>
void PreAcquireRequest<I>::send_prepare_lock() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
// acquire the lock if the image is not busy performing other actions
Context *ctx = create_context_callback<
PreAcquireRequest<I>, &PreAcquireRequest<I>::handle_prepare_lock>(this);
m_image_ctx.state->prepare_lock(ctx);
}
template <typename I>
void PreAcquireRequest<I>::handle_prepare_lock(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << "r=" << r << dendl;
send_flush_notifies();
}
template <typename I>
void PreAcquireRequest<I>::send_flush_notifies() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
using klass = PreAcquireRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_flush_notifies>(
this);
m_image_ctx.image_watcher->flush(ctx);
}
template <typename I>
void PreAcquireRequest<I>::handle_flush_notifies(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
ceph_assert(r == 0);
finish();
}
template <typename I>
void PreAcquireRequest<I>::finish() {
m_on_finish->complete(m_error_result);
delete this;
}
} // namespace exclusive_lock
} // namespace librbd
template class librbd::exclusive_lock::PreAcquireRequest<librbd::ImageCtx>;
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