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-rw-r--r--src/librbd/mirror/DemoteRequest.h86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/librbd/mirror/DemoteRequest.h b/src/librbd/mirror/DemoteRequest.h
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+++ b/src/librbd/mirror/DemoteRequest.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H
+#define CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H
+
+#include "cls/rbd/cls_rbd_types.h"
+#include "librbd/mirror/Types.h"
+
+struct Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace mirror {
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class DemoteRequest {
+public:
+ static DemoteRequest *create(ImageCtxT &image_ctx, Context *on_finish) {
+ return new DemoteRequest(image_ctx, on_finish);
+ }
+
+ DemoteRequest(ImageCtxT &image_ctx, Context *on_finish)
+ : m_image_ctx(image_ctx), m_on_finish(on_finish) {
+ }
+
+ void send();
+
+private:
+ /**
+ * @verbatim
+ *
+ * <start>
+ * |
+ * v
+ * GET_INFO
+ * |
+ * v
+ * ACQUIRE_LOCK * * * *
+ * | *
+ * v *
+ * DEMOTE *
+ * | *
+ * v *
+ * RELEASE_LOCK *
+ * | *
+ * v *
+ * <finish> < * * * * *
+ *
+ * @endverbatim
+ */
+
+ ImageCtxT &m_image_ctx;
+ Context *m_on_finish;
+
+ int m_ret_val = 0;
+ bool m_blocked_requests = false;
+
+ cls::rbd::MirrorImage m_mirror_image;
+ PromotionState m_promotion_state = PROMOTION_STATE_PRIMARY;
+ std::string m_primary_mirror_uuid;
+
+ void get_info();
+ void handle_get_info(int r);
+
+ void acquire_lock();
+ void handle_acquire_lock(int r);
+
+ void demote();
+ void handle_demote(int r);
+
+ void release_lock();
+ void handle_release_lock(int r);
+
+ void finish(int r);
+
+};
+
+} // namespace mirror
+} // namespace librbd
+
+extern template class librbd::mirror::DemoteRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H