116 lines
2.5 KiB
C++
116 lines
2.5 KiB
C++
#include "era/metadata.h"
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#include "persistent-data/space-maps/core.h"
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using namespace era;
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//----------------------------------------------------------------
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namespace {
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// FIXME: duplication
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transaction_manager::ptr
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open_tm(block_manager::ptr bm) {
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auto nr_blocks = bm->get_nr_blocks();
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if (!nr_blocks)
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throw runtime_error("Metadata is not large enough for superblock.");
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space_map::ptr sm{create_core_map(nr_blocks)};
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sm->inc(SUPERBLOCK_LOCATION);
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transaction_manager::ptr tm(new transaction_manager(bm, sm));
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return tm;
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}
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void
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copy_space_maps(space_map::ptr lhs, space_map::ptr rhs) {
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for (block_address b = 0; b < rhs->get_nr_blocks(); b++) {
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uint32_t count = rhs->get_count(b);
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if (count > 0)
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lhs->set_count(b, rhs->get_count(b));
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}
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}
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}
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metadata::metadata(block_manager::ptr bm, open_type ot)
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{
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switch (ot) {
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case CREATE:
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create_metadata(bm);
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break;
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case OPEN:
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open_metadata(bm);
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break;
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}
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}
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metadata::metadata(block_manager::ptr bm, block_address metadata_snap)
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{
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open_metadata(bm);
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}
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void
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metadata::create_metadata(block_manager::ptr bm)
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{
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tm_ = open_tm(bm);
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space_map::ptr core = tm_->get_sm();
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metadata_sm_ = create_metadata_sm(*tm_, tm_->get_bm()->get_nr_blocks());
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copy_space_maps(metadata_sm_, core);
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tm_->set_sm(metadata_sm_);
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writeset_tree_ = writeset_tree::ptr(new writeset_tree(*tm_, era_detail_traits::ref_counter(tm_)));
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era_array_ = era_array::ptr(new era_array(*tm_,
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uint32_traits::ref_counter()));
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}
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void
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metadata::open_metadata(block_manager::ptr bm, block_address loc)
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{
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tm_ = open_tm(bm);
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sb_ = read_superblock(tm_->get_bm(), loc);
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writeset_tree_ = writeset_tree::ptr(new writeset_tree(*tm_,
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sb_.writeset_tree_root,
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era_detail_traits::ref_counter(tm_)));
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era_array_ = era_array::ptr(new era_array(*tm_,
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uint32_traits::ref_counter(),
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sb_.era_array_root,
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sb_.nr_blocks));
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}
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void
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metadata::commit()
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{
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commit_space_map();
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commit_writesets();
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commit_era_array();
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commit_superblock();
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}
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void
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metadata::commit_space_map()
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{
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metadata_sm_->commit();
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metadata_sm_->copy_root(&sb_.metadata_space_map_root, sizeof(sb_.metadata_space_map_root));
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}
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void
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metadata::commit_writesets()
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{
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sb_.writeset_tree_root = writeset_tree_->get_root();
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}
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void
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metadata::commit_era_array()
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{
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sb_.era_array_root = era_array_->get_root();
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}
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void
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metadata::commit_superblock()
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{
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write_superblock(tm_->get_bm(), sb_);
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}
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//----------------------------------------------------------------
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