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Diffstat (limited to '')
-rw-r--r-- | src/librbd/exclusive_lock/PostAcquireRequest.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/librbd/exclusive_lock/PostAcquireRequest.h b/src/librbd/exclusive_lock/PostAcquireRequest.h new file mode 100644 index 000000000..2f7efdf07 --- /dev/null +++ b/src/librbd/exclusive_lock/PostAcquireRequest.h @@ -0,0 +1,124 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_EXCLUSIVE_LOCK_POST_ACQUIRE_REQUEST_H +#define CEPH_LIBRBD_EXCLUSIVE_LOCK_POST_ACQUIRE_REQUEST_H + +#include "include/int_types.h" +#include "include/buffer.h" +#include "librbd/ImageCtx.h" +#include "msg/msg_types.h" +#include <string> + +class Context; + +namespace librbd { + +namespace exclusive_lock { + +template <typename ImageCtxT = ImageCtx> +class PostAcquireRequest { +public: + static PostAcquireRequest* create(ImageCtxT &image_ctx, Context *on_acquire, + Context *on_finish); + + ~PostAcquireRequest(); + void send(); + +private: + + /** + * @verbatim + * + * <start> + * | + * | + * v + * REFRESH (skip if not + * | needed) + * v + * OPEN_OBJECT_MAP (skip if + * | disabled) + * v + * OPEN_JOURNAL (skip if + * | * disabled) + * | * + * | * * * * * * * * + * v * + * ALLOCATE_JOURNAL_TAG * + * | * * + * | * * + * v * * + * PROCESS_PLUGIN_ACQUIRE* + * | * * + * | * * + * | v v v + * | PROCESS_PLUGIN_RELEASE + * | | + * | v + * | CLOSE_JOURNAL + * | | + * | v + * | CLOSE_OBJECT_MAP + * | | + * v | + * <finish> <----------/ + * + * @endverbatim + */ + + PostAcquireRequest(ImageCtxT &image_ctx, Context *on_acquire, + Context *on_finish); + + ImageCtxT &m_image_ctx; + Context *m_on_acquire; + Context *m_on_finish; + + decltype(m_image_ctx.object_map) m_object_map; + decltype(m_image_ctx.journal) m_journal; + + bool m_prepare_lock_completed = false; + int m_error_result; + + void send_refresh(); + void handle_refresh(int r); + + void send_open_journal(); + void handle_open_journal(int r); + + void send_allocate_journal_tag(); + void handle_allocate_journal_tag(int r); + + void send_open_object_map(); + void handle_open_object_map(int r); + + void send_close_journal(); + void handle_close_journal(int r); + + void send_close_object_map(); + void handle_close_object_map(int r); + + void send_process_plugin_acquire_lock(); + void handle_process_plugin_acquire_lock(int r); + + void send_process_plugin_release_lock(); + void handle_process_plugin_release_lock(int r); + + void apply(); + void revert(); + + void finish(); + + void save_result(int result) { + if (m_error_result == 0 && result < 0) { + m_error_result = result; + } + } +}; + +} // namespace exclusive_lock +} // namespace librbd + +extern template class librbd::exclusive_lock::PostAcquireRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_EXCLUSIVE_LOCK_POST_ACQUIRE_REQUEST_H |