102 lines
2.4 KiB
C++
102 lines
2.4 KiB
C++
#include "caching/metadata.h"
|
|
#include "caching/superblock.h"
|
|
#include "persistent-data/space-maps/core.h"
|
|
|
|
using namespace caching;
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace {
|
|
using namespace superblock_detail;
|
|
|
|
unsigned const METADATA_CACHE_SIZE = 1024;
|
|
|
|
// FIXME: duplication
|
|
transaction_manager::ptr
|
|
open_tm(block_manager<>::ptr bm) {
|
|
space_map::ptr sm(new core_map(bm->get_nr_blocks()));
|
|
sm->inc(SUPERBLOCK_LOCATION);
|
|
transaction_manager::ptr tm(new transaction_manager(bm, sm));
|
|
return tm;
|
|
}
|
|
|
|
void
|
|
copy_space_maps(space_map::ptr lhs, space_map::ptr rhs) {
|
|
for (block_address b = 0; b < rhs->get_nr_blocks(); b++) {
|
|
uint32_t count = rhs->get_count(b);
|
|
if (count > 0)
|
|
lhs->set_count(b, rhs->get_count(b));
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
metadata::metadata(block_manager<>::ptr bm, open_type ot)
|
|
{
|
|
switch (ot) {
|
|
case CREATE:
|
|
create_metadata(bm);
|
|
break;
|
|
|
|
case OPEN:
|
|
open_metadata(bm);
|
|
break;
|
|
|
|
default:
|
|
throw runtime_error("unhandled open_type");
|
|
}
|
|
}
|
|
|
|
void
|
|
metadata::commit()
|
|
{
|
|
metadata_sm_->commit();
|
|
metadata_sm_->copy_root(&sb_.metadata_space_map_root, sizeof(sb_.metadata_space_map_root));
|
|
sb_.mapping_root = mappings_->get_root();
|
|
|
|
write_ref superblock = tm_->get_bm()->superblock_zero(SUPERBLOCK_LOCATION, superblock_validator());
|
|
superblock_disk *disk = reinterpret_cast<superblock_disk *>(superblock.data().raw());
|
|
superblock_traits::pack(sb_, *disk);
|
|
}
|
|
|
|
void
|
|
metadata::init_superblock()
|
|
{
|
|
#if 0
|
|
sb_.magic_ = SUPERBLOCK_MAGIC;
|
|
sb_.version_ = 1;
|
|
sb_.data_mapping_root_ = mappings_->get_root();
|
|
sb_.device_details_root_ = details_->get_root();
|
|
sb_.data_block_size_ = data_block_size;
|
|
sb_.metadata_block_size_ = MD_BLOCK_SIZE;
|
|
sb_.metadata_nr_blocks_ = tm_->get_bm()->get_nr_blocks();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
metadata::create_metadata(block_manager<>::ptr bm)
|
|
{
|
|
tm_ = open_tm(bm);
|
|
|
|
::memset(&sb_, 0, sizeof(sb_));
|
|
init_superblock();
|
|
|
|
space_map::ptr core = tm_->get_sm();
|
|
metadata_sm_ = create_metadata_sm(tm_, tm_->get_bm()->get_nr_blocks());
|
|
copy_space_maps(metadata_sm_, core);
|
|
tm_->set_sm(metadata_sm_);
|
|
|
|
mappings_ = mapping_array::ptr(new mapping_array(tm_, mapping_array::ref_counter()));
|
|
// hints_ = hint_array::ptr(new hint_array(tm_));
|
|
}
|
|
|
|
void
|
|
metadata::open_metadata(block_manager<>::ptr bm)
|
|
{
|
|
tm_ = open_tm(bm);
|
|
sb_ = read_superblock(tm_->get_bm());
|
|
}
|
|
|
|
//----------------------------------------------------------------
|