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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/librbd/cache/pwl/InitRequest.h | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/librbd/cache/pwl/InitRequest.h')
-rw-r--r-- | src/librbd/cache/pwl/InitRequest.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/librbd/cache/pwl/InitRequest.h b/src/librbd/cache/pwl/InitRequest.h new file mode 100644 index 000000000..56e63425e --- /dev/null +++ b/src/librbd/cache/pwl/InitRequest.h @@ -0,0 +1,105 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_CACHE_RWL_INIT_REQUEST_H +#define CEPH_LIBRBD_CACHE_RWL_INIT_REQUEST_H + +class Context; + +namespace librbd { + +class ImageCtx; + +namespace io { class ImageDispatchInterface; } + +namespace plugin { template <typename> struct Api; } + +namespace cache { + +class ImageWritebackInterface; + +namespace pwl { + +template<typename> +class AbstractWriteLog; + +template<typename> +class ImageCacheState; + +template <typename ImageCtxT = ImageCtx> +class InitRequest { +public: + static InitRequest* create( + ImageCtxT &image_ctx, + librbd::cache::ImageWritebackInterface& image_writeback, + plugin::Api<ImageCtxT>& plugin_api, + Context *on_finish); + + void send(); + +private: + + /** + * @verbatim + * + * Init request goes through the following state machine: + * + * <start> + * | + * v + * GET_IMAGE_CACHE_STATE + * | + * v + * INIT_IMAGE_CACHE + * | + * v + * SET_FEATURE_BIT * * * > CLOSE_IMAGE_CACHE + * | | + * v | + * <finish> <-------------------/ + * + * @endverbatim + */ + + InitRequest(ImageCtxT &image_ctx, + librbd::cache::ImageWritebackInterface& image_writeback, + plugin::Api<ImageCtxT>& plugin_api, + Context *on_finish); + + ImageCtxT &m_image_ctx; + librbd::cache::ImageWritebackInterface& m_image_writeback; + plugin::Api<ImageCtxT>& m_plugin_api; + AbstractWriteLog<ImageCtxT> *m_image_cache; + Context *m_on_finish; + + int m_error_result; + + bool is_pwl_enabled(); + + void get_image_cache_state(); + + void init_image_cache(); + void handle_init_image_cache(int r); + + void set_feature_bit(); + void handle_set_feature_bit(int r); + + void shutdown_image_cache(); + void handle_shutdown_image_cache(int r); + + void finish(); + + void save_result(int result) { + if (m_error_result == 0 && result < 0) { + m_error_result = result; + } + } +}; + +} // namespace pwl +} // namespace cache +} // namespace librbd + +extern template class librbd::cache::pwl::InitRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_CACHE_RWL_INIT_REQUEST_H |