thin-provisioning-tools/caching/metadata.h
Ming-Hung Tsai 8806dfe4f4 [cache_writeback] Fix space map commits
Fix github issue #138
2022-01-10 23:31:10 +08:00

62 lines
1.6 KiB
C++

#ifndef CACHE_METADATA_H
#define CACHE_METADATA_H
#include "base/endian_utils.h"
#include "persistent-data/block.h"
#include "persistent-data/data-structures/array.h"
#include "persistent-data/data-structures/bitset.h"
#include "persistent-data/space-maps/disk.h"
#include "persistent-data/transaction_manager.h"
#include "caching/superblock.h"
#include "caching/hint_array.h"
#include "caching/mapping_array.h"
//----------------------------------------------------------------
namespace caching {
class metadata {
public:
enum open_type {
CREATE
};
typedef block_manager::read_ref read_ref;
typedef block_manager::write_ref write_ref;
typedef std::shared_ptr<metadata> ptr;
metadata(block_manager::ptr bm, open_type ot, unsigned metadata_version = 2); // Create only
metadata(block_manager::ptr bm, bool read_space_map = false);
void commit(bool clean_shutdown = true);
void setup_hint_array(size_t width);
typedef persistent_data::transaction_manager tm;
tm::ptr tm_;
superblock sb_;
checked_space_map::ptr metadata_sm_;
mapping_array::ptr mappings_;
hint_array::ptr hints_;
persistent_data::bitset::ptr discard_bits_;
persistent_data::bitset::ptr dirty_bits_;
private:
void init_superblock();
void create_metadata(block_manager::ptr bm, unsigned metadata_version);
void open_metadata(block_manager::ptr bm, bool read_space_map);
void commit_space_map();
void commit_mappings();
void commit_hints();
void commit_discard_bits();
void commit_superblock(bool clean_shutdown);
};
};
//----------------------------------------------------------------
#endif