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Diffstat (limited to 'src/librbd/image/RefreshParentRequest.h')
-rw-r--r-- | src/librbd/image/RefreshParentRequest.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/librbd/image/RefreshParentRequest.h b/src/librbd/image/RefreshParentRequest.h new file mode 100644 index 000000000..086d8ec1b --- /dev/null +++ b/src/librbd/image/RefreshParentRequest.h @@ -0,0 +1,109 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_IMAGE_REFRESH_PARENT_REQUEST_H +#define CEPH_LIBRBD_IMAGE_REFRESH_PARENT_REQUEST_H + +#include "include/int_types.h" +#include "librbd/Types.h" + +class Context; + +namespace librbd { + +class ImageCtx; + +namespace image { + +template <typename ImageCtxT = ImageCtx> +class RefreshParentRequest { +public: + static RefreshParentRequest *create(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info, + Context *on_finish) { + return new RefreshParentRequest(child_image_ctx, parent_md, migration_info, + on_finish); + } + + static bool is_refresh_required(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info); + + void send(); + void apply(); + void finalize(Context *on_finish); + +private: + /** + * @verbatim + * + * <start> + * | + * | (open required) + * |----------------> OPEN_PARENT * * * * * * * * * * * * * * * + * | | * + * | v (on error) * + * \----------------> <apply> * + * | * + * | (close required) * + * |-----------------> CLOSE_PARENT * + * | | * + * | v * + * | RESET_EXISTENCE * + * | | * + * | v * + * \-----------------> <finish> < * * * * + * + * @endverbatim + */ + + RefreshParentRequest(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info, Context *on_finish); + + ImageCtxT &m_child_image_ctx; + ParentImageInfo m_parent_md; + MigrationInfo m_migration_info; + Context *m_on_finish; + + ImageCtxT *m_parent_image_ctx; + uint64_t m_parent_snap_id; + + int m_error_result; + + static bool is_close_required(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info); + static bool is_open_required(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info); + static bool does_parent_exist(ImageCtxT &child_image_ctx, + const ParentImageInfo &parent_md, + const MigrationInfo &migration_info); + + void send_open_parent(); + Context *handle_open_parent(int *result); + + void send_close_parent(); + Context *handle_close_parent(int *result); + + void send_reset_existence_cache(); + Context *handle_reset_existence_cache(int *result); + + void send_complete(int r); + + void save_result(int *result) { + if (m_error_result == 0 && *result < 0) { + m_error_result = *result; + } + } + +}; + +} // namespace image +} // namespace librbd + +extern template class librbd::image::RefreshParentRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_IMAGE_REFRESH_PARENT_REQUEST_H |