device_tree

thin-provisioning/device_tree.h

@@ -0,0 +1,51 @@
+#ifndef THIN_DEVICE_CHECKER_H
+#define THIN_DEVICE_CHECKER_H
+
+#include "persistent-data/data-structures/btree.h"
+#include "persistent-data/range.h"
+
+#include "thin-provisioning/metadata_disk_structures.h"
+
+//----------------------------------------------------------------
+
+namespace thin_provisioning {
+	typedef persistent_data::btree<1, device_details_traits> device_tree;
+
+	namespace device_tree_detail {
+		class damage_visitor;
+
+		struct damage {
+			virtual ~damage() {}
+			virtual void visit(damage_visitor &v) const = 0;
+		};
+
+		struct missing_devices : public damage {
+			missing_devices(std::string const &desc, range<uint64_t> const &keys);
+			virtual void visit(damage_visitor &v) const;
+
+			std::string desc_;
+			range<uint64_t> keys_;
+		};
+
+		class damage_visitor {
+		public:
+			virtual ~damage_visitor() {}
+
+			void visit(damage const &d) {
+				d.visit(*this);
+			}
+
+			virtual void visit(btree_path const &path, missing_devices const &d) = 0;
+		};
+
+		// FIXME: need to add some more damage types for bad leaf data
+
+	};
+
+	void check_device_tree(device_tree const &tree,
+			       device_tree_detail::damage_visitor &visitor);
+}
+
+//----------------------------------------------------------------
+
+#endif