144 lines
4.1 KiB
C++
144 lines
4.1 KiB
C++
// Copyright (C) 2011 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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#include "restore_emitter.h"
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using namespace boost;
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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class restorer : public emitter {
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public:
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restorer(metadata::ptr md)
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: md_(md),
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in_superblock_(false) {
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}
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virtual ~restorer() {
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}
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virtual void begin_superblock(std::string const &uuid,
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uint64_t time,
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uint64_t trans_id,
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uint32_t data_block_size,
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uint64_t nr_data_blocks,
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optional<uint64_t> metadata_snap) {
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in_superblock_ = true;
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superblock &sb = md_->sb_;
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memcpy(&sb.uuid_, &uuid, sizeof(&sb.uuid_));
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sb.time_ = time;
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sb.trans_id_ = trans_id;
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sb.data_block_size_ = data_block_size;
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sb.metadata_snap_ = metadata_snap ? *metadata_snap : 0;
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md_->data_sm_->extend(nr_data_blocks);
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}
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virtual void end_superblock() {
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if (!in_superblock_)
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throw runtime_error("missing superblock");
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md_->commit();
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in_superblock_ = false;
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}
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virtual void begin_device(uint32_t dev,
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uint64_t mapped_blocks,
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uint64_t trans_id,
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uint64_t creation_time,
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uint64_t snap_time) {
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if (!in_superblock_)
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throw runtime_error("missing superblock");
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if (device_exists(dev))
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throw std::runtime_error("Device already exists");
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// Add entry to the details tree
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uint64_t key[1] = {dev};
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device_details details = {mapped_blocks, trans_id, (uint32_t)creation_time, (uint32_t)snap_time};
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md_->details_->insert(key, details);
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// Insert an empty mapping tree
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single_mapping_tree::ptr new_tree(
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new single_mapping_tree(md_->tm_,
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block_time_ref_counter(md_->data_sm_)));
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md_->mappings_top_level_->insert(key, new_tree->get_root());
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md_->mappings_->set_root(md_->mappings_top_level_->get_root()); // FIXME: ugly
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current_device_ = optional<uint32_t>(dev);
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}
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virtual void end_device() {
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current_device_ = optional<uint32_t>();
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}
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virtual void begin_named_mapping(std::string const &name) {
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throw runtime_error("not implemented");
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}
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virtual void end_named_mapping() {
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throw runtime_error("not implemented");
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}
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virtual void identifier(std::string const &name) {
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throw runtime_error("not implemented");
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}
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virtual void range_map(uint64_t origin_begin, uint64_t data_begin, uint32_t time, uint64_t len) {
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for (uint64_t i = 0; i < len; i++)
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single_map(origin_begin++, data_begin++, time);
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}
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virtual void single_map(uint64_t origin_block, uint64_t data_block, uint32_t time) {
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if (!current_device_)
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throw runtime_error("not in device");
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uint64_t key[2] = {*current_device_, origin_block};
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block_time bt;
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bt.block_ = data_block;
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bt.time_ = time;
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md_->mappings_->insert(key, bt);
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md_->mappings_top_level_->set_root(md_->mappings_->get_root());
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md_->data_sm_->inc(data_block);
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}
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private:
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bool device_exists(thin_dev_t dev) const {
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uint64_t key[1] = {dev};
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detail_tree::maybe_value v = md_->details_->lookup(key);
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return v;
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}
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metadata::ptr md_;
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bool in_superblock_;
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optional<uint32_t> current_device_;
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};
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}
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//----------------------------------------------------------------
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emitter::ptr
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thin_provisioning::create_restore_emitter(metadata::ptr md)
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{
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return emitter::ptr(new restorer(md));
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}
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//----------------------------------------------------------------
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