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Diffstat (limited to 'src/librbd/cache/pwl/ImageCacheState.h')
-rw-r--r-- | src/librbd/cache/pwl/ImageCacheState.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/librbd/cache/pwl/ImageCacheState.h b/src/librbd/cache/pwl/ImageCacheState.h new file mode 100644 index 000000000..5be5f73ac --- /dev/null +++ b/src/librbd/cache/pwl/ImageCacheState.h @@ -0,0 +1,86 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H +#define CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H + +#include "json_spirit/json_spirit.h" +#include "librbd/ImageCtx.h" +#include "librbd/cache/Types.h" +#include <string> + +namespace ceph { + class Formatter; +} + +namespace librbd { + +namespace plugin { template <typename> struct Api; } + +namespace cache { +namespace pwl { + +template <typename ImageCtxT = ImageCtx> +class ImageCacheState { +private: + ImageCtxT* m_image_ctx; + plugin::Api<ImageCtxT>& m_plugin_api; +public: + bool present = false; + bool empty = true; + bool clean = true; + std::string host; + std::string path; + std::string mode; + uint64_t size = 0; + /* After reloading, the following data does not need to be read, + * but recalculated. */ + utime_t stats_timestamp; + uint64_t allocated_bytes = 0; + uint64_t cached_bytes = 0; + uint64_t dirty_bytes = 0; + uint64_t free_bytes = 0; + uint64_t hits_full = 0; + uint64_t hits_partial = 0; + uint64_t misses = 0; + uint64_t hit_bytes = 0; + uint64_t miss_bytes = 0; + + ImageCacheState(ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api) + : m_image_ctx(image_ctx), m_plugin_api(plugin_api) {} + + ~ImageCacheState() {} + + ImageCacheType get_image_cache_mode() const { + if (mode == "rwl") { + return IMAGE_CACHE_TYPE_RWL; + } else if (mode == "ssd") { + return IMAGE_CACHE_TYPE_SSD; + } + return IMAGE_CACHE_TYPE_UNKNOWN; + } + + void init_from_config(); + bool init_from_metadata(json_spirit::mValue& json_root); + + void write_image_cache_state(std::unique_lock<ceph::mutex>& locker, + Context *on_finish); + + void clear_image_cache_state(Context *on_finish); + + static ImageCacheState<ImageCtxT>* create_image_cache_state( + ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api, int &r); + + static ImageCacheState<ImageCtxT>* get_image_cache_state( + ImageCtxT* image_ctx, plugin::Api<ImageCtxT>& plugin_api); + + bool is_valid(); +}; + +} // namespace pwl +} // namespace cache +} // namespace librbd + +extern template class librbd::cache::pwl::ImageCacheState<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_CACHE_RWL_IMAGE_CACHE_STATE_H |