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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "ceph_ver.h"
#include "common/dout.h"
#include "common/errno.h"
#include "common/PluginRegistry.h"
#include "librbd/ImageCtx.h"
#include "librbd/cache/WriteLogImageDispatch.h"
#include "librbd/cache/ImageWriteback.h"
#include "librbd/cache/Utils.h"
#include "librbd/cache/pwl/DiscardRequest.h"
#include "librbd/cache/pwl/InitRequest.h"
#include "librbd/io/ImageDispatcherInterface.h"
#include "librbd/plugin/WriteLogImageCache.h"
extern "C" {
const char *__ceph_plugin_version() {
return CEPH_GIT_NICE_VER;
}
int __ceph_plugin_init(CephContext *cct, const std::string& type,
const std::string& name) {
auto plugin_registry = cct->get_plugin_registry();
return plugin_registry->add(
type, name, new librbd::plugin::WriteLogImageCache<librbd::ImageCtx>(cct));
}
} // extern "C"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::plugin::WriteLogImageCache: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace plugin {
template <typename I>
void WriteLogImageCache<I>::init(I* image_ctx, Api<I>& api,
cache::ImageWritebackInterface& image_writeback,
PluginHookPoints& hook_points_list,
Context* on_finish) {
bool pwl_enabled = librbd::cache::util::is_pwl_enabled(*image_ctx);
if (!pwl_enabled || !image_ctx->data_ctx.is_valid()) {
on_finish->complete(0);
return;
}
auto cct = image_ctx->cct;
ldout(cct, 5) << dendl;
auto hook_points = std::make_unique<WriteLogImageCache::HookPoints>(
image_ctx, image_writeback, api);
hook_points_list.emplace_back(std::move(hook_points));
on_finish->complete(0);
}
template <typename I>
WriteLogImageCache<I>::~WriteLogImageCache() {
}
template <typename I>
WriteLogImageCache<I>::HookPoints::HookPoints(
I* image_ctx, cache::ImageWritebackInterface& image_writeback,
plugin::Api<I>& plugin_api)
: m_image_ctx(image_ctx), m_image_writeback(image_writeback),
m_plugin_api(plugin_api)
{
}
template <typename I>
WriteLogImageCache<I>::HookPoints::~HookPoints() {
}
template <typename I>
void WriteLogImageCache<I>::HookPoints::acquired_exclusive_lock(
Context* on_finish) {
cache::pwl::InitRequest<I> *req = cache::pwl::InitRequest<I>::create(
*m_image_ctx, m_image_writeback, m_plugin_api, on_finish);
req->send();
}
template <typename I>
void WriteLogImageCache<I>::HookPoints::prerelease_exclusive_lock(
Context* on_finish) {
m_image_ctx->io_image_dispatcher->shut_down_dispatch(
io::IMAGE_DISPATCH_LAYER_WRITEBACK_CACHE, on_finish);
}
template <typename I>
void WriteLogImageCache<I>::HookPoints::discard(
Context* on_finish) {
cache::pwl::DiscardRequest<I> *req = cache::pwl::DiscardRequest<I>::create(
*m_image_ctx, m_plugin_api, on_finish);
req->send();
}
} // namespace plugin
} // namespace librbd
template class librbd::plugin::WriteLogImageCache<librbd::ImageCtx>;
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