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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/plugin/ParentCache.h"
#include "ceph_ver.h"
#include "common/dout.h"
#include "common/errno.h"
#include "common/PluginRegistry.h"
#include "librbd/ImageCtx.h"
#include "librbd/cache/ParentCacheObjectDispatch.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::ParentCache<librbd::ImageCtx>(cct));
}
} // extern "C"
#define dout_subsys ceph_subsys_rbd
#undef dout_prefix
#define dout_prefix *_dout << "librbd::plugin::ParentCache: " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace plugin {
template <typename I>
void ParentCache<I>::init(I* image_ctx, Api<I>& api,
cache::ImageWritebackInterface& image_writeback,
PluginHookPoints& hook_points_list,
Context* on_finish) {
bool parent_cache_enabled = image_ctx->config.template get_val<bool>(
"rbd_parent_cache_enabled");
if (image_ctx->child == nullptr || !parent_cache_enabled ||
!image_ctx->data_ctx.is_valid()) {
on_finish->complete(0);
return;
}
auto cct = image_ctx->cct;
ldout(cct, 5) << dendl;
auto parent_cache = cache::ParentCacheObjectDispatch<I>::create(
image_ctx, api);
on_finish = new LambdaContext([this, on_finish, parent_cache](int r) {
if (r < 0) {
// the object dispatcher will handle cleanup if successfully initialized
delete parent_cache;
}
handle_init_parent_cache(r, on_finish);
});
parent_cache->init(on_finish);
}
template <typename I>
void ParentCache<I>::handle_init_parent_cache(int r, Context* on_finish) {
ldout(cct, 5) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "Failed to initialize parent cache object dispatch layer: "
<< cpp_strerror(r) << dendl;
on_finish->complete(r);
return;
}
on_finish->complete(0);
}
} // namespace plugin
} // namespace librbd
template class librbd::plugin::ParentCache<librbd::ImageCtx>;
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