thin-provisioning-tools/caching/restore_emitter.cc
2013-09-24 12:37:27 +01:00

118 lines
2.5 KiB
C++

#include "caching/restore_emitter.h"
#include "caching/superblock.h"
#include "caching/mapping_array.h"
using namespace caching;
using namespace mapping_array_detail;
using namespace std;
using namespace superblock_detail;
//----------------------------------------------------------------
namespace {
class restorer : public emitter {
public:
restorer(metadata::ptr md)
: in_superblock_(false),
md_(md) {
}
virtual ~restorer() {
}
virtual void begin_superblock(std::string const &uuid,
pd::block_address block_size,
pd::block_address nr_cache_blocks,
std::string const &policy) {
superblock &sb = md_->sb_;
sb.flags = 0;
memset(sb.uuid, 0, sizeof(sb.uuid));
sb.magic = caching::superblock_detail::SUPERBLOCK_MAGIC;
sb.version = 0; // FIXME: fix
// strncpy(sb.policy_name, policy.c_str(), sizeof(sb.policy_name));
memset(sb.policy_version, 0, sizeof(sb.policy_version));
sb.policy_hint_size = 0; // FIXME: fix
memset(sb.metadata_space_map_root, 0, sizeof(sb.metadata_space_map_root));
sb.mapping_root = 0;
sb.hint_root = 0;
sb.discard_root = 0;
sb.discard_block_size = 0;
sb.discard_nr_blocks = 0;
sb.data_block_size = block_size;
sb.metadata_block_size = 0;
sb.cache_blocks = nr_cache_blocks;
sb.compat_flags = 0;
sb.compat_ro_flags = 0;
sb.incompat_flags = 0;
sb.read_hits = 0;
sb.read_misses = 0;
sb.write_hits = 0;
sb.write_misses = 0;
struct mapping unmapped_value;
unmapped_value.oblock_ = 0;
unmapped_value.flags_ = 0;
md_->mappings_->grow(nr_cache_blocks, unmapped_value);
}
virtual void end_superblock() {
md_->commit();
}
virtual void begin_mappings() {
// noop
}
virtual void end_mappings() {
// noop
}
virtual void mapping(pd::block_address cblock,
pd::block_address oblock,
bool dirty) {
mapping_array_detail::mapping m;
m.oblock_ = oblock;
m.flags_ = M_VALID;
if (dirty)
m.flags_ = m.flags_ | M_DIRTY;
md_->mappings_->set(cblock, m);
}
virtual void begin_hints() {
// noop
}
virtual void end_hints() {
// noop
}
virtual void hint(pd::block_address cblock,
vector<unsigned char> const &data) {
}
private:
bool in_superblock_;
metadata::ptr md_;
};
}
//----------------------------------------------------------------
emitter::ptr
caching::create_restore_emitter(metadata::ptr md)
{
return emitter::ptr(new restorer(md));
}
//----------------------------------------------------------------