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Diffstat (limited to 'src/librbd/object_map/LockRequest.h')
-rw-r--r-- | src/librbd/object_map/LockRequest.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/librbd/object_map/LockRequest.h b/src/librbd/object_map/LockRequest.h new file mode 100644 index 00000000..0333548e --- /dev/null +++ b/src/librbd/object_map/LockRequest.h @@ -0,0 +1,75 @@ +// -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_OBJECT_MAP_LOCK_REQUEST_H +#define CEPH_LIBRBD_OBJECT_MAP_LOCK_REQUEST_H + +#include "include/buffer.h" +#include "cls/lock/cls_lock_types.h" +#include <map> + +class Context; + +namespace librbd { + +class ImageCtx; + +namespace object_map { + +template <typename ImageCtxT = ImageCtx> +class LockRequest { +public: + static LockRequest* create(ImageCtxT &image_ctx, Context *on_finish) { + return new LockRequest(image_ctx, on_finish); + } + LockRequest(ImageCtxT &image_ctx, Context *on_finish); + + void send(); + +private: + /** + * @verbatim + * + * <start> /------------------------------------- BREAK_LOCKS * * * + * | | ^ * + * | | | * + * | | | * + * | v (EBUSY && !broke_lock) | * + * \---------> LOCK_OBJECT_MAP * * * * * * * * * * * > GET_LOCK_INFO * * + * | * ^ * * + * | * * * * + * | * * (ENOENT) * * + * | * * * * * * * * * * * * * * * * * * + * | * * + * | * (other errors) * + * | * * + * v v (other errors) * + * <finish> < * * * * * * * * * * * * * * * * * * * * * * * * + * + * @endverbatim + */ + + ImageCtxT &m_image_ctx; + Context *m_on_finish; + + bool m_broke_lock; + std::map<rados::cls::lock::locker_id_t, + rados::cls::lock::locker_info_t> m_lockers; + bufferlist m_out_bl; + + void send_lock(); + Context *handle_lock(int *ret_val); + + void send_get_lock_info(); + Context *handle_get_lock_info(int *ret_val); + + void send_break_locks(); + Context *handle_break_locks(int *ret_val); +}; + +} // namespace object_map +} // namespace librbd + +extern template class librbd::object_map::LockRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_OBJECT_MAP_LOCK_REQUEST_H |