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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/PluginRegistry.h"
#include "include/Context.h"
#include "common/dout.h"
#include "librbd/cache/ImageWriteback.h"
#include "librbd/ImageCtx.h"
#include "librbd/plugin/Api.h"
#include <boost/tokenizer.hpp>
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::PluginRegistry: " \
<< this << " " << __func__ << ": "
namespace librbd {
template <typename I>
PluginRegistry<I>::PluginRegistry(I* image_ctx)
: m_image_ctx(image_ctx), m_plugin_api(std::make_unique<plugin::Api<I>>()),
m_image_writeback(std::make_unique<cache::ImageWriteback<I>>(*image_ctx)) {
}
template <typename I>
PluginRegistry<I>::~PluginRegistry() {
}
template <typename I>
void PluginRegistry<I>::init(const std::string& plugins, Context* on_finish) {
auto cct = m_image_ctx->cct;
auto plugin_registry = cct->get_plugin_registry();
auto gather_ctx = new C_Gather(cct, on_finish);
boost::tokenizer<boost::escaped_list_separator<char>> tokenizer(plugins);
for (auto token : tokenizer) {
ldout(cct, 5) << "attempting to load plugin: " << token << dendl;
auto ctx = gather_ctx->new_sub();
auto plugin = dynamic_cast<plugin::Interface<I>*>(
plugin_registry->get_with_load("librbd", "librbd_" + token));
if (plugin == nullptr) {
lderr(cct) << "failed to load plugin: " << token << dendl;
ctx->complete(-ENOSYS);
break;
}
plugin->init(
m_image_ctx, *m_plugin_api, *m_image_writeback, m_plugin_hook_points, ctx);
}
gather_ctx->activate();
}
template <typename I>
void PluginRegistry<I>::acquired_exclusive_lock(Context* on_finish) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
auto gather_ctx = new C_Gather(cct, on_finish);
for (auto &hook : m_plugin_hook_points) {
auto ctx = gather_ctx->new_sub();
hook->acquired_exclusive_lock(ctx);
}
gather_ctx->activate();
}
template <typename I>
void PluginRegistry<I>::prerelease_exclusive_lock(Context* on_finish) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
auto gather_ctx = new C_Gather(cct, on_finish);
for (auto &hook : m_plugin_hook_points) {
auto ctx = gather_ctx->new_sub();
hook->prerelease_exclusive_lock(ctx);
}
gather_ctx->activate();
}
template <typename I>
void PluginRegistry<I>::discard(Context* on_finish) {
auto cct = m_image_ctx->cct;
ldout(cct, 20) << dendl;
auto gather_ctx = new C_Gather(cct, on_finish);
for (auto &hook : m_plugin_hook_points) {
auto ctx = gather_ctx->new_sub();
hook->discard(ctx);
}
gather_ctx->activate();
}
} // namespace librbd
template class librbd::PluginRegistry<librbd::ImageCtx>;
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