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-rw-r--r--src/librbd/cache/ParentCacheObjectDispatch.h161
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diff --git a/src/librbd/cache/ParentCacheObjectDispatch.h b/src/librbd/cache/ParentCacheObjectDispatch.h
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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,
+ 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