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Diffstat (limited to '')
-rw-r--r-- | src/librbd/cache/ObjectCacherObjectDispatch.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/librbd/cache/ObjectCacherObjectDispatch.h b/src/librbd/cache/ObjectCacherObjectDispatch.h new file mode 100644 index 000000000..0cc87bd87 --- /dev/null +++ b/src/librbd/cache/ObjectCacherObjectDispatch.h @@ -0,0 +1,132 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_CACHE_OBJECT_CACHER_OBJECT_DISPATCH_H +#define CEPH_LIBRBD_CACHE_OBJECT_CACHER_OBJECT_DISPATCH_H + +#include "librbd/io/ObjectDispatchInterface.h" +#include "common/ceph_mutex.h" +#include "osdc/ObjectCacher.h" + +struct WritebackHandler; + +namespace librbd { + +class ImageCtx; + +namespace cache { + +/** + * Facade around the OSDC object cacher to make it align with + * the object dispatcher interface + */ +template <typename ImageCtxT = ImageCtx> +class ObjectCacherObjectDispatch : public io::ObjectDispatchInterface { +public: + static ObjectCacherObjectDispatch* create(ImageCtxT* image_ctx, + size_t max_dirty, + bool writethrough_until_flush) { + return new ObjectCacherObjectDispatch(image_ctx, max_dirty, + writethrough_until_flush); + } + + ObjectCacherObjectDispatch(ImageCtxT* image_ctx, size_t max_dirty, + bool writethrough_until_flush); + ~ObjectCacherObjectDispatch() override; + + io::ObjectDispatchLayer get_dispatch_layer() const override { + return io::OBJECT_DISPATCH_LAYER_CACHE; + } + + void init(); + void shut_down(Context* on_finish) override; + + 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) override; + + 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) override; + + 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) override; + + 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) override; + + bool flush( + io::FlushSource flush_source, const ZTracer::Trace &parent_trace, + uint64_t* journal_tid, io::DispatchResult* dispatch_result, + Context** on_finish, Context* on_dispatched) override; + + 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) override; + bool reset_existence_cache(Context* on_finish) override; + + 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; + } + +private: + struct C_InvalidateCache; + + ImageCtxT* m_image_ctx; + size_t m_max_dirty; + bool m_writethrough_until_flush; + + ceph::mutex m_cache_lock; + ObjectCacher *m_object_cacher = nullptr; + ObjectCacher::ObjectSet *m_object_set = nullptr; + + WritebackHandler *m_writeback_handler = nullptr; + + bool m_user_flushed = false; + +}; + +} // namespace cache +} // namespace librbd + +extern template class librbd::cache::ObjectCacherObjectDispatch<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_CACHE_OBJECT_CACHER_OBJECT_DISPATCH_H |