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