99 lines
2.1 KiB
C++
99 lines
2.1 KiB
C++
#include "caching/restore_emitter.h"
|
|
#include "caching/superblock.h"
|
|
#include "caching/mapping_array.h"
|
|
|
|
using namespace caching;
|
|
using namespace std;
|
|
using namespace superblock_damage;
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
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,
|
|
size_t hint_width) {
|
|
|
|
superblock &sb = md_->sb_;
|
|
strncpy((char *) sb.policy_name, policy.c_str(), sizeof(sb.policy_name));
|
|
memset(sb.policy_version, 0, sizeof(sb.policy_version)); // FIXME: should come from xml
|
|
sb.policy_hint_size = hint_width;
|
|
md_->setup_hint_array(hint_width);
|
|
|
|
sb.data_block_size = block_size;
|
|
sb.cache_blocks = nr_cache_blocks;
|
|
|
|
struct mapping unmapped_value;
|
|
unmapped_value.oblock_ = 0;
|
|
unmapped_value.flags_ = 0;
|
|
md_->mappings_->grow(nr_cache_blocks, unmapped_value);
|
|
|
|
vector<unsigned char> hint_value(hint_width, '\0');
|
|
md_->hints_->grow(nr_cache_blocks, hint_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) {
|
|
typename caching::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));
|
|
}
|
|
|
|
//----------------------------------------------------------------
|