thin-provisioning-tools/thin-provisioning/pool_stream.h

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// Copyright (C) 2015 Red Hat, Inc. All rights reserved.
//
// This file is part of the thin-provisioning-tools source.
//
// thin-provisioning-tools is free software: you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// thin-provisioning-tools is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with thin-provisioning-tools. If not, see
// <http://www.gnu.org/licenses/>.
#ifndef POOL_STREAM_H
#define POOL_STREAM_H
#include "thin-provisioning/cache_stream.h"
#include "thin-provisioning/rmap_visitor.h"
#include "thin-provisioning/superblock.h"
//----------------------------------------------------------------
namespace thin_provisioning {
class pool_stream : public chunk_stream {
public:
pool_stream(cache_stream &stream,
transaction_manager::ptr tm, superblock_detail::superblock const &sb,
block_address nr_blocks);
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block_address size() const;
void rewind();
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bool next(block_address count = 1ull);
bool eof() const;
chunk const &get();
void put(chunk const &c);
private:
typedef rmap_visitor::region region;
typedef rmap_visitor::rmap_region rmap_region;
// FIXME: too big to return by value
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vector<rmap_region> read_rmap(transaction_manager::ptr tm,
superblock_detail::superblock const &sb,
block_address nr_blocks);
void init_rmap(transaction_manager::ptr tm, superblock_detail::superblock const &sb,
block_address nr_blocks);
bool advance_one();
cache_stream &stream_;
vector<uint32_t> block_to_thin_;
block_address nr_mapped_;
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block_address index_;
block_address block_size_;
};
}
//----------------------------------------------------------------
#endif