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-rw-r--r--src/librbd/operation/SnapshotRemoveRequest.h122
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diff --git a/src/librbd/operation/SnapshotRemoveRequest.h b/src/librbd/operation/SnapshotRemoveRequest.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_OPERATION_SNAPSHOT_REMOVE_REQUEST_H
+#define CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H
+
+#include "librbd/operation/Request.h"
+#include "include/buffer.h"
+#include "librbd/Types.h"
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace operation {
+
+template <typename ImageCtxT = ImageCtx>
+class SnapshotRemoveRequest : public Request<ImageCtxT> {
+public:
+ /**
+ * @verbatim
+ *
+ * <start>
+ * |
+ * v
+ * TRASH_SNAP
+ * |
+ * v (skip if unsupported)
+ * GET_SNAP
+ * |
+ * v (skip if unnecessary)
+ * LIST_CHILDREN <-------------\
+ * | |
+ * v (skip if unnecessary) | (repeat as needed)
+ * DETACH_STALE_CHILD ---------/
+ * |
+ * v (skip if unnecessary)
+ * DETACH_CHILD
+ * |
+ * v (skip if disabled/in-use)
+ * REMOVE_OBJECT_MAP
+ * |
+ * v (skip if in-use)
+ * RELEASE_SNAP_ID
+ * |
+ * v (skip if in-use)
+ * REMOVE_SNAP
+ * |
+ * v
+ * <finish>
+ *
+ * @endverbatim
+ */
+
+ static SnapshotRemoveRequest *create(
+ ImageCtxT &image_ctx, const cls::rbd::SnapshotNamespace &snap_namespace,
+ const std::string &snap_name, uint64_t snap_id, Context *on_finish) {
+ return new SnapshotRemoveRequest(image_ctx, on_finish, snap_namespace,
+ snap_name, snap_id);
+ }
+
+ SnapshotRemoveRequest(ImageCtxT &image_ctx, Context *on_finish,
+ const cls::rbd::SnapshotNamespace &snap_namespace,
+ const std::string &snap_name,
+ uint64_t snap_id);
+
+protected:
+ void send_op() override;
+ bool should_complete(int r) override;
+
+ journal::Event create_event(uint64_t op_tid) const override {
+ return journal::SnapRemoveEvent(op_tid, m_snap_namespace, m_snap_name);
+ }
+
+private:
+ cls::rbd::SnapshotNamespace m_snap_namespace;
+ cls::rbd::ChildImageSpecs m_child_images;
+ std::string m_snap_name;
+ uint64_t m_snap_id;
+ bool m_trashed_snapshot = false;
+ bool m_child_attached = false;
+
+ ceph::bufferlist m_out_bl;
+
+ void trash_snap();
+ void handle_trash_snap(int r);
+
+ void get_snap();
+ void handle_get_snap(int r);
+
+ void list_children();
+ void handle_list_children(int r);
+
+ void detach_stale_child();
+ void handle_detach_stale_child(int r);
+
+ void detach_child();
+ void handle_detach_child(int r);
+
+ void remove_object_map();
+ void handle_remove_object_map(int r);
+
+ void release_snap_id();
+ void handle_release_snap_id(int r);
+
+ void remove_snap();
+ void handle_remove_snap(int r);
+
+ void remove_snap_context();
+ int scan_for_parents(cls::rbd::ParentImageSpec &pspec);
+
+};
+
+} // namespace operation
+} // namespace librbd
+
+extern template class librbd::operation::SnapshotRemoveRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H