163 lines
4.4 KiB
C++
163 lines
4.4 KiB
C++
#ifndef MAPPING_TREE_H
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#define MAPPING_TREE_H
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#include "base/run.h"
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#include "persistent-data/data-structures/btree.h"
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//----------------------------------------------------------------
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namespace thin_provisioning {
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namespace mapping_tree_detail {
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class space_map_ref_counter {
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public:
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space_map_ref_counter(space_map::ptr sm);
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void inc(block_address b);
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void dec(block_address b);
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private:
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space_map::ptr sm_;
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};
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struct block_time {
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uint64_t block_;
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uint32_t time_;
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};
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class block_time_ref_counter {
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public:
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block_time_ref_counter(space_map::ptr sm);
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void inc(block_time bt);
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void dec(block_time bt);
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private:
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space_map::ptr sm_;
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};
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struct block_traits {
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typedef base::le64 disk_type;
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typedef block_time value_type;
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typedef block_time_ref_counter ref_counter;
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static void unpack(disk_type const &disk, value_type &value);
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static void pack(value_type const &value, disk_type &disk);
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};
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class mtree_ref_counter final : public ref_counter<block_address> {
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public:
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mtree_ref_counter(transaction_manager &tm);
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void set(block_address const &b, uint32_t rc);
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void inc(block_address const &b);
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void dec(block_address const &b);
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private:
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transaction_manager &tm_;
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};
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// This value type is itself a tree containing mappings.
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// Used when manipulating the top level of the mapping
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// tree.
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struct mtree_traits {
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typedef base::le64 disk_type;
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typedef uint64_t value_type;
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typedef mtree_ref_counter ref_counter;
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static void unpack(disk_type const &disk, value_type &value);
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static void pack(value_type const &value, disk_type &disk);
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};
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//--------------------------------
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class damage_visitor;
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struct damage {
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virtual ~damage() {}
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virtual void visit(damage_visitor &v) const = 0;
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};
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struct missing_devices : public damage {
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missing_devices(std::string const &desc, run<uint64_t> const &keys);
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virtual void visit(damage_visitor &v) const;
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std::string desc_;
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run<uint64_t> keys_;
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};
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struct missing_mappings : public damage {
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missing_mappings(std::string const &desc, uint64_t thin_dev,
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run<uint64_t> const &keys);
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virtual void visit(damage_visitor &v) const;
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std::string desc_;
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uint64_t thin_dev_;
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run<uint64_t> keys_;
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};
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class damage_visitor {
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public:
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typedef std::shared_ptr<damage_visitor> ptr;
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virtual ~damage_visitor() {}
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void visit(damage const &d) {
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d.visit(*this);
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}
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virtual void visit(missing_devices const &d) = 0;
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virtual void visit(missing_mappings const &d) = 0;
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};
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class mapping_visitor {
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public:
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virtual ~mapping_visitor() {}
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// path contains 2 elements, the dev key, then the oblock
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virtual void visit(btree_path const &path, block_time const &m) = 0;
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};
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class device_visitor {
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public:
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virtual ~device_visitor() {}
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virtual void visit(btree_path const &path, block_address dtree_root) = 0;
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};
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}
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typedef persistent_data::btree<2, mapping_tree_detail::block_traits> mapping_tree;
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typedef persistent_data::btree<1, mapping_tree_detail::mtree_traits> dev_tree;
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typedef persistent_data::btree<1, mapping_tree_detail::block_traits> single_mapping_tree;
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void walk_mapping_tree(dev_tree const &tree,
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mapping_tree_detail::device_visitor &dev_v,
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mapping_tree_detail::damage_visitor &dv,
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bool ignore_non_fatal = false);
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void walk_mapping_tree(mapping_tree const &tree,
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mapping_tree_detail::mapping_visitor &mv,
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mapping_tree_detail::damage_visitor &dv,
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bool ignore_non_fatal = false);
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void walk_mapping_tree(single_mapping_tree const &tree,
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uint64_t dev_id,
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mapping_tree_detail::mapping_visitor &mv,
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mapping_tree_detail::damage_visitor &dv,
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bool ignore_non_fatal = false);
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void check_mapping_tree(single_mapping_tree const &tree,
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uint64_t dev_id,
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mapping_tree_detail::damage_visitor &visitor,
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bool ignore_non_fatal = false);
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void check_mapping_tree(dev_tree const &tree,
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mapping_tree_detail::damage_visitor &visitor,
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bool ignore_non_fatal = false);
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void check_mapping_tree(mapping_tree const &tree,
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mapping_tree_detail::damage_visitor &visitor,
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bool ignore_non_fatal = false);
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}
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//----------------------------------------------------------------
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#endif
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