thin-provisioning-tools/era/metadata.cc
2014-01-31 16:31:27 +00:00

66 lines
1.5 KiB
C++

#include "era/metadata.h"
#include "persistent-data/space-maps/core.h"
using namespace era;
//----------------------------------------------------------------
namespace {
unsigned const METADATA_CACHE_SIZ = 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:
// finish
throw runtime_error("not imlemented");
break;
case OPEN:
open_metadata(bm);
break;
}
}
metadata::metadata(block_manager<>::ptr bm, block_address metadata_snap)
{
open_metadata(bm);
}
void
metadata::open_metadata(block_manager<>::ptr bm, block_address loc)
{
tm_ = open_tm(bm);
sb_ = read_superblock(tm_->get_bm(), loc);
writeset_tree_ = writeset_tree::ptr(new writeset_tree(tm_,
sb_.writeset_tree_root,
era_detail_traits::ref_counter(tm_)));
era_array_ = era_array::ptr(new era_array(tm_,
uint32_traits::ref_counter(),
sb_.era_array_root,
sb_.nr_blocks));
}
//----------------------------------------------------------------