85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
#ifndef MULTISNAP_METADATA_H
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#define MULTISNAP_METADATA_H
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#include "emitter.h"
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#include "error_set.h"
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#include "metadata_ll.h"
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#include <string>
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#include <boost/shared_ptr.hpp>
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//----------------------------------------------------------------
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namespace thin_provisioning {
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class metadata;
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class thin {
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public:
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typedef boost::shared_ptr<thin> ptr;
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typedef boost::optional<block_time> maybe_address;
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thin_dev_t get_dev_t() const;
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maybe_address lookup(block_address thin_block);
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void insert(block_address thin_block, block_address data_block);
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void remove(block_address thin_block);
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void set_snapshot_time(uint32_t time);
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block_address get_mapped_blocks() const;
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void set_mapped_blocks(block_address count);
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private:
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friend class metadata;
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thin(thin_dev_t dev, metadata *metadata);
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thin_dev_t dev_;
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metadata *metadata_;
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};
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class metadata {
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public:
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typedef boost::shared_ptr<metadata> ptr;
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metadata(metadata_ll::ptr md);
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~metadata();
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void create_thin(thin_dev_t dev);
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void create_snap(thin_dev_t dev, thin_dev_t origin);
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void del(thin_dev_t);
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void set_transaction_id(uint64_t id);
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uint64_t get_transaction_id() const;
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block_address get_held_root() const;
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block_address alloc_data_block();
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void free_data_block(block_address b);
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// accessors
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block_address get_nr_free_data_blocks() const;
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sector_t get_data_block_size() const;
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block_address get_data_dev_size() const;
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thin::ptr open_thin(thin_dev_t);
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// FIXME: split out into a separate interface
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// Validation
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boost::optional<persistent_data::error_set::ptr> check();
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// FIXME: split out into a separate interface
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// Dumping metadata
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void dump(emitter::ptr e);
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private:
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friend class thin;
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bool device_exists(thin_dev_t dev) const;
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metadata_ll::ptr md_;
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};
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};
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//----------------------------------------------------------------
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#endif
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