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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/cache/pwl/InitRequest.h"
#include "librbd/io/ImageDispatcher.h"
#include "librbd/Utils.h"
#include "common/dout.h"
#include "common/errno.h"
#include "librbd/asio/ContextWQ.h"
#include "librbd/cache/pwl/ImageCacheState.h"
#include "librbd/cache/WriteLogImageDispatch.h"
#include "librbd/cache/ImageWriteback.h"
#ifdef WITH_RBD_RWL
#include "librbd/cache/pwl/rwl/WriteLog.h"
#endif
#ifdef WITH_RBD_SSD_CACHE
#include "librbd/cache/pwl/ssd/WriteLog.h"
#endif
#include "librbd/cache/Utils.h"
#include "librbd/ImageCtx.h"
#include "librbd/plugin/Api.h"
#define dout_subsys ceph_subsys_rbd_pwl
#undef dout_prefix
#define dout_prefix *_dout << "librbd::cache::pwl:InitRequest " \
<< this << " " << __func__ << ": "
namespace librbd {
namespace cache {
namespace pwl {
using librbd::util::create_async_context_callback;
using librbd::util::create_context_callback;
template <typename I>
InitRequest<I>* InitRequest<I>::create(
I &image_ctx,
cache::ImageWritebackInterface& image_writeback,
plugin::Api<I>& plugin_api,
Context *on_finish) {
return new InitRequest(image_ctx, image_writeback, plugin_api, on_finish);
}
template <typename I>
InitRequest<I>::InitRequest(
I &image_ctx,
cache::ImageWritebackInterface& image_writeback,
plugin::Api<I>& plugin_api,
Context *on_finish)
: m_image_ctx(image_ctx),
m_image_writeback(image_writeback),
m_plugin_api(plugin_api),
m_on_finish(create_async_context_callback(image_ctx, on_finish)),
m_error_result(0) {
}
template <typename I>
void InitRequest<I>::send() {
get_image_cache_state();
}
template <typename I>
void InitRequest<I>::get_image_cache_state() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
int r;
auto cache_state = ImageCacheState<I>::create_image_cache_state(
&m_image_ctx, m_plugin_api, r);
if (r < 0 || !cache_state) {
save_result(r);
finish();
return;
} else if (!cache_state->is_valid()) {
delete cache_state;
cache_state = nullptr;
lderr(cct) << "failed to get image cache state: " << cpp_strerror(r)
<< dendl;
save_result(-ENOENT);
finish();
return;
}
auto mode = cache_state->get_image_cache_mode();
switch (mode) {
#ifdef WITH_RBD_RWL
case cache::IMAGE_CACHE_TYPE_RWL:
m_image_cache =
new librbd::cache::pwl::rwl::WriteLog<I>(m_image_ctx,
cache_state,
m_image_writeback,
m_plugin_api);
break;
#endif
#ifdef WITH_RBD_SSD_CACHE
case cache::IMAGE_CACHE_TYPE_SSD:
m_image_cache =
new librbd::cache::pwl::ssd::WriteLog<I>(m_image_ctx,
cache_state,
m_image_writeback,
m_plugin_api);
break;
#endif
default:
delete cache_state;
cache_state = nullptr;
save_result(-ENOENT);
finish();
return;
}
init_image_cache();
}
template <typename I>
void InitRequest<I>::init_image_cache() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
using klass = InitRequest<I>;
Context *ctx = create_async_context_callback(m_image_ctx,
create_context_callback<klass, &klass::handle_init_image_cache>(this));
m_image_cache->init(ctx);
}
template <typename I>
void InitRequest<I>::handle_init_image_cache(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
if (r < 0) {
lderr(cct) << "failed to init image cache: " << cpp_strerror(r)
<< dendl;
delete m_image_cache;
m_image_cache = nullptr;
save_result(r);
finish();
return;
}
set_feature_bit();
}
template <typename I>
void InitRequest<I>::set_feature_bit() {
CephContext *cct = m_image_ctx.cct;
uint64_t new_features = m_image_ctx.features | RBD_FEATURE_DIRTY_CACHE;
uint64_t features_mask = RBD_FEATURE_DIRTY_CACHE;
ldout(cct, 10) << "old_features=" << m_image_ctx.features
<< ", new_features=" << new_features
<< ", features_mask=" << features_mask
<< dendl;
int r = librbd::cls_client::set_features(&m_image_ctx.md_ctx,
m_image_ctx.header_oid,
new_features, features_mask);
m_image_ctx.features |= RBD_FEATURE_DIRTY_CACHE;
using klass = InitRequest<I>;
Context *ctx = create_context_callback<klass, &klass::handle_set_feature_bit>(
this);
ctx->complete(r);
}
template <typename I>
void InitRequest<I>::handle_set_feature_bit(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "failed to set feature bit: " << cpp_strerror(r)
<< dendl;
save_result(r);
shutdown_image_cache();
}
// Register RWL dispatch
auto image_dispatch = new cache::WriteLogImageDispatch<I>(
&m_image_ctx, m_image_cache, m_plugin_api);
m_image_ctx.io_image_dispatcher->register_dispatch(image_dispatch);
finish();
}
template <typename I>
void InitRequest<I>::shutdown_image_cache() {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
using klass = InitRequest<I>;
Context *ctx = create_context_callback<
klass, &klass::handle_shutdown_image_cache>(this);
m_image_cache->shut_down(ctx);
}
template <typename I>
void InitRequest<I>::handle_shutdown_image_cache(int r) {
CephContext *cct = m_image_ctx.cct;
ldout(cct, 10) << dendl;
if (r < 0) {
lderr(cct) << "failed to close image cache: " << cpp_strerror(r)
<< dendl;
}
delete m_image_cache;
m_image_cache = nullptr;
finish();
}
template <typename I>
void InitRequest<I>::finish() {
m_on_finish->complete(m_error_result);
delete this;
}
} // namespace pwl
} // namespace cache
} // namespace librbd
template class librbd::cache::pwl::InitRequest<librbd::ImageCtx>;
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