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Diffstat (limited to 'src/librbd/operation/DisableFeaturesRequest.h')
| -rw-r--r-- | src/librbd/operation/DisableFeaturesRequest.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/librbd/operation/DisableFeaturesRequest.h b/src/librbd/operation/DisableFeaturesRequest.h new file mode 100644 index 000000000..719a03399 --- /dev/null +++ b/src/librbd/operation/DisableFeaturesRequest.h @@ -0,0 +1,171 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_LIBRBD_OPERATION_DISABLE_FEATURES_REQUEST_H +#define CEPH_LIBRBD_OPERATION_DISABLE_FEATURES_REQUEST_H + +#include "librbd/ImageCtx.h" +#include "librbd/operation/Request.h" +#include "cls/rbd/cls_rbd_client.h" + +class Context; + +namespace librbd { + +class ImageCtx; + +namespace operation { + +template <typename ImageCtxT = ImageCtx> +class DisableFeaturesRequest : public Request<ImageCtxT> { +public: + static DisableFeaturesRequest *create(ImageCtxT &image_ctx, Context *on_finish, + uint64_t journal_op_tid, + uint64_t features, bool force) { + return new DisableFeaturesRequest(image_ctx, on_finish, journal_op_tid, + features, force); + } + + DisableFeaturesRequest(ImageCtxT &image_ctx, Context *on_finish, + uint64_t journal_op_tid, uint64_t features, bool force); + +protected: + void send_op() override; + bool should_complete(int r) override; + bool can_affect_io() const override { + return true; + } + journal::Event create_event(uint64_t op_tid) const override { + return journal::UpdateFeaturesEvent(op_tid, m_features, false); + } + +private: + /** + * DisableFeatures goes through the following state machine: + * + * @verbatim + * + * <start> + * | + * v + * STATE_PREPARE_LOCK + * | + * v + * STATE_BLOCK_WRITES + * | + * v + * STATE_ACQUIRE_EXCLUSIVE_LOCK (skip if not + * | required) + * | (disbling journaling) + * \-------------------\ + * | | + * | V + * | STATE_GET_MIRROR_MODE + * |(not | + * | disabling v + * | journaling) STATE_GET_MIRROR_IMAGE + * | | + * | v + * | STATE_DISABLE_MIRROR_IMAGE (skip if not + * | | required) + * | v + * | STATE_CLOSE_JOURNAL + * | | + * | v + * | STATE_REMOVE_JOURNAL + * | | + * |/-------------------/ + * | + * v + * STATE_APPEND_OP_EVENT (skip if journaling + * | disabled) + * v + * STATE_REMOVE_OBJECT_MAP (skip if not + * | disabling object map) + * v + * STATE_SET_FEATURES + * | + * v + * STATE_UPDATE_FLAGS + * | + * v + * STATE_NOTIFY_UPDATE + * | + * v + * STATE_REALEASE_EXCLUSIVE_LOCK (skip if not + * | required) + * | (unblock writes) + * v + * <finish> + * + * @endverbatim + * + */ + + uint64_t m_features; + bool m_force; + + bool m_acquired_lock = false; + bool m_writes_blocked = false; + bool m_image_lock_acquired = false; + bool m_requests_blocked = false; + + uint64_t m_new_features = 0; + uint64_t m_disable_flags = 0; + uint64_t m_features_mask = 0; + + decltype(ImageCtxT::journal) m_journal = nullptr; + cls::rbd::MirrorMode m_mirror_mode = cls::rbd::MIRROR_MODE_DISABLED; + bufferlist m_out_bl; + + void send_prepare_lock(); + Context *handle_prepare_lock(int *result); + + void send_block_writes(); + Context *handle_block_writes(int *result); + + Context *send_acquire_exclusive_lock(int *result); + Context *handle_acquire_exclusive_lock(int *result); + + void send_get_mirror_mode(); + Context *handle_get_mirror_mode(int *result); + + void send_get_mirror_image(); + Context *handle_get_mirror_image(int *result); + + void send_disable_mirror_image(); + Context *handle_disable_mirror_image(int *result); + + void send_close_journal(); + Context *handle_close_journal(int *result); + + void send_remove_journal(); + Context *handle_remove_journal(int *result); + + void send_append_op_event(); + Context *handle_append_op_event(int *result); + + void send_remove_object_map(); + Context *handle_remove_object_map(int *result); + + void send_set_features(); + Context *handle_set_features(int *result); + + void send_update_flags(); + Context *handle_update_flags(int *result); + + void send_notify_update(); + Context *handle_notify_update(int *result); + + void send_release_exclusive_lock(); + Context *handle_release_exclusive_lock(int *result); + + Context *handle_finish(int r); +}; + +} // namespace operation +} // namespace librbd + +extern template class librbd::operation::DisableFeaturesRequest<librbd::ImageCtx>; + +#endif // CEPH_LIBRBD_OPERATION_DISABLE_FEATURES_REQUEST_H |