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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_CACHE_PARENT_CACHER_OBJECT_DISPATCH_H
#define CEPH_LIBRBD_CACHE_PARENT_CACHER_OBJECT_DISPATCH_H
#include "librbd/io/ObjectDispatchInterface.h"
#include "common/ceph_mutex.h"
#include "librbd/cache/TypeTraits.h"
#include "tools/immutable_object_cache/CacheClient.h"
#include "tools/immutable_object_cache/Types.h"
namespace librbd {
class ImageCtx;
namespace plugin { template <typename> struct Api; }
namespace cache {
template <typename ImageCtxT = ImageCtx>
class ParentCacheObjectDispatch : public io::ObjectDispatchInterface {
// mock unit testing support
typedef cache::TypeTraits<ImageCtxT> TypeTraits;
typedef typename TypeTraits::CacheClient CacheClient;
public:
static ParentCacheObjectDispatch* create(ImageCtxT* image_ctx,
plugin::Api<ImageCtxT>& plugin_api) {
return new ParentCacheObjectDispatch(image_ctx, plugin_api);
}
ParentCacheObjectDispatch(ImageCtxT* image_ctx,
plugin::Api<ImageCtxT>& plugin_api);
~ParentCacheObjectDispatch() override;
io::ObjectDispatchLayer get_dispatch_layer() const override {
return io::OBJECT_DISPATCH_LAYER_PARENT_CACHE;
}
void init(Context* on_finish = nullptr);
void shut_down(Context* on_finish) {
m_image_ctx->op_work_queue->queue(on_finish, 0);
}
bool read(
uint64_t object_no, io::ReadExtents* extents, IOContext io_context,
int op_flags, int read_flags, const ZTracer::Trace &parent_trace,
uint64_t* version, int* object_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) override;
bool discard(
uint64_t object_no, uint64_t object_off, uint64_t object_len,
IOContext io_context, int discard_flags,
const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
uint64_t* journal_tid, io::DispatchResult* dispatch_result,
Context** on_finish, Context* on_dispatched) {
return false;
}
bool write(
uint64_t object_no, uint64_t object_off, ceph::bufferlist&& data,
IOContext io_context, int op_flags, int write_flags,
std::optional<uint64_t> assert_version,
const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
uint64_t* journal_tid, io::DispatchResult* dispatch_result,
Context** on_finish, Context* on_dispatched) {
return false;
}
bool write_same(
uint64_t object_no, uint64_t object_off, uint64_t object_len,
io::LightweightBufferExtents&& buffer_extents, ceph::bufferlist&& data,
IOContext io_context, int op_flags,
const ZTracer::Trace &parent_trace, int* object_dispatch_flags,
uint64_t* journal_tid, io::DispatchResult* dispatch_result,
Context** on_finish, Context* on_dispatched) {
return false;
}
bool compare_and_write(
uint64_t object_no, uint64_t object_off, ceph::bufferlist&& cmp_data,
ceph::bufferlist&& write_data, IOContext io_context, int op_flags,
const ZTracer::Trace &parent_trace, uint64_t* mismatch_offset,
int* object_dispatch_flags, uint64_t* journal_tid,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) {
return false;
}
bool flush(
io::FlushSource flush_source, const ZTracer::Trace &parent_trace,
uint64_t* journal_id, io::DispatchResult* dispatch_result,
Context** on_finish, Context* on_dispatched) {
return false;
}
bool list_snaps(
uint64_t object_no, io::Extents&& extents, io::SnapIds&& snap_ids,
int list_snap_flags, const ZTracer::Trace &parent_trace,
io::SnapshotDelta* snapshot_delta, int* object_dispatch_flags,
io::DispatchResult* dispatch_result, Context** on_finish,
Context* on_dispatched) override {
return false;
}
bool invalidate_cache(Context* on_finish) {
return false;
}
bool reset_existence_cache(Context* on_finish) {
return false;
}
void extent_overwritten(
uint64_t object_no, uint64_t object_off, uint64_t object_len,
uint64_t journal_tid, uint64_t new_journal_tid) {
}
int prepare_copyup(
uint64_t object_no,
io::SnapshotSparseBufferlist* snapshot_sparse_bufferlist) override {
return 0;
}
ImageCtxT* get_image_ctx() {
return m_image_ctx;
}
CacheClient* get_cache_client() {
return m_cache_client;
}
private:
int read_object(std::string file_path, ceph::bufferlist* read_data,
uint64_t offset, uint64_t length, Context *on_finish);
void handle_read_cache(ceph::immutable_obj_cache::ObjectCacheRequest* ack,
uint64_t object_no, io::ReadExtents* extents,
IOContext io_context, int read_flags,
const ZTracer::Trace &parent_trace,
io::DispatchResult* dispatch_result,
Context* on_dispatched);
int handle_register_client(bool reg);
void create_cache_session(Context* on_finish, bool is_reconnect);
ImageCtxT* m_image_ctx;
plugin::Api<ImageCtxT>& m_plugin_api;
ceph::mutex m_lock;
CacheClient *m_cache_client = nullptr;
bool m_connecting = false;
};
} // namespace cache
} // namespace librbd
extern template class librbd::cache::ParentCacheObjectDispatch<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_CACHE_PARENT_CACHER_OBJECT_DISPATCH_H
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