thin-provisioning-tools/thin-provisioning/mapping_tree.h

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#ifndef MAPPING_TREE_H
#define MAPPING_TREE_H
#include "persistent-data/data-structures/btree.h"
#include "persistent-data/range.h"
//----------------------------------------------------------------
namespace thin_provisioning {
namespace mapping_tree_detail {
class space_map_ref_counter {
public:
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space_map_ref_counter(space_map::ptr sm);
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void inc(block_address b);
void dec(block_address b);
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private:
space_map::ptr sm_;
};
struct block_time {
uint64_t block_;
uint32_t time_;
};
class block_time_ref_counter {
public:
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block_time_ref_counter(space_map::ptr sm);
void inc(block_time bt);
void dec(block_time bt);
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private:
space_map::ptr sm_;
};
struct block_traits {
typedef base::le64 disk_type;
typedef block_time value_type;
typedef block_time_ref_counter ref_counter;
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static void unpack(disk_type const &disk, value_type &value);
static void pack(value_type const &value, disk_type &disk);
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};
class mtree_ref_counter {
public:
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mtree_ref_counter(transaction_manager::ptr tm);
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void inc(block_address b);
void dec(block_address b);
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private:
transaction_manager::ptr tm_;
};
struct mtree_traits {
typedef base::le64 disk_type;
typedef uint64_t value_type;
typedef mtree_ref_counter ref_counter;
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static void unpack(disk_type const &disk, value_type &value);
static void pack(value_type const &value, disk_type &disk);
};
//--------------------------------
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_;
};
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struct missing_mappings : public damage {
missing_mappings(std::string const &desc, uint64_t thin_dev,
range<uint64_t> const &keys);
virtual void visit(damage_visitor &v) const;
std::string desc_;
uint64_t thin_dev_;
range<uint64_t> keys_;
};
class damage_visitor {
public:
virtual ~damage_visitor() {}
void visit(damage const &d) {
d.visit(*this);
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}
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virtual void visit(missing_devices const &d) = 0;
virtual void visit(missing_mappings const &d) = 0;
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};
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}
typedef persistent_data::btree<2, mapping_tree_detail::block_traits> mapping_tree;
typedef persistent_data::btree<1, mapping_tree_detail::mtree_traits> dev_tree;
typedef persistent_data::btree<1, mapping_tree_detail::block_traits> single_mapping_tree;
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void check_mapping_tree(mapping_tree const &tree,
mapping_tree_detail::damage_visitor &visitor);
}
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//----------------------------------------------------------------
#endif