thin-provisioning-tools/thin-provisioning/superblock.cc

#include "thin-provisioning/superblock.h"
#include "thin-provisioning/superblock_validator.h"

using namespace thin_provisioning;
using namespace superblock_detail;

//----------------------------------------------------------------

void
superblock_traits::unpack(superblock_disk const &disk, superblock &value)
{
	value.csum_ = to_cpu<uint32_t>(disk.csum_);
	value.flags_ = to_cpu<uint32_t>(disk.flags_);
	value.blocknr_ = to_cpu<uint64_t>(disk.blocknr_);

	::memcpy(value.uuid_, disk.uuid_, sizeof(value.uuid_));
	value.magic_ = to_cpu<uint64_t>(disk.magic_);
	value.version_ = to_cpu<uint32_t>(disk.version_);
	value.time_ = to_cpu<uint32_t>(disk.time_);

	value.trans_id_ = to_cpu<uint64_t>(disk.trans_id_);
	value.metadata_snap_ = to_cpu<uint64_t>(disk.metadata_snap_);

	::memcpy(value.data_space_map_root_,
		 disk.data_space_map_root_,
		 sizeof(value.data_space_map_root_));
	::memcpy(value.metadata_space_map_root_,
		 disk.metadata_space_map_root_,
		 sizeof(value.metadata_space_map_root_));

	value.data_mapping_root_ = to_cpu<uint64_t>(disk.data_mapping_root_);
	value.device_details_root_ = to_cpu<uint64_t>(disk.device_details_root_);
	value.data_block_size_ = to_cpu<uint32_t>(disk.data_block_size_);

	value.metadata_block_size_ = to_cpu<uint32_t>(disk.metadata_block_size_);
	value.metadata_nr_blocks_ = to_cpu<uint64_t>(disk.metadata_nr_blocks_);

	value.compat_flags_ = to_cpu<uint32_t>(disk.compat_flags_);
	value.incompat_flags_ = to_cpu<uint32_t>(disk.incompat_flags_);
}

void
superblock_traits::pack(superblock const &value, superblock_disk &disk)
{
	disk.csum_ = to_disk<le32>(value.csum_);
	disk.flags_ = to_disk<le32>(value.flags_);
	disk.blocknr_ = to_disk<le64>(value.blocknr_);

	::memcpy(disk.uuid_, value.uuid_, sizeof(disk.uuid_));
	disk.magic_ = to_disk<le64>(value.magic_);
	disk.version_ = to_disk<le32>(value.version_);
	disk.time_ = to_disk<le32>(value.time_);

	disk.trans_id_ = to_disk<le64>(value.trans_id_);
	disk.metadata_snap_ = to_disk<le64>(value.metadata_snap_);

	::memcpy(disk.data_space_map_root_,
		 value.data_space_map_root_,
		 sizeof(disk.data_space_map_root_));
	::memcpy(disk.metadata_space_map_root_,
		 value.metadata_space_map_root_,
		 sizeof(disk.metadata_space_map_root_));

	disk.data_mapping_root_ = to_disk<le64>(value.data_mapping_root_);
	disk.device_details_root_ = to_disk<le64>(value.device_details_root_);
	disk.data_block_size_ = to_disk<le32>(value.data_block_size_);

	disk.metadata_block_size_ = to_disk<le32>(value.metadata_block_size_);
	disk.metadata_nr_blocks_ = to_disk<le64>(value.metadata_nr_blocks_);

	disk.compat_flags_ = to_disk<le32>(value.compat_flags_);
	disk.incompat_flags_ = to_disk<le32>(value.incompat_flags_);
}

//----------------------------------------------------------------


#if 0
superblock_checker::superblock_checker(block_manager::ptr bm)
	: checker(bm)
{
}

// FIXME: Other things to check:
// - magic
// - version
// - 3 * flags (should be zero)
// - in bounds: metadata_snap, data_mapping_root
// - metadata_nr_blocks_ matches what we've been given.
damage_list_ptr
superblock_checker::check()
{
	superblock sb;

	damage_list_ptr damage(new damage_list);

	try {
		block_manager::read_ref r = bm_->read_lock(SUPERBLOCK_LOCATION, superblock_validator());
		superblock_disk const *sbd = reinterpret_cast<superblock_disk const *>(&r.data());
		superblock_traits::unpack(*sbd, sb);

	} catch (checksum_error const &e) {
		metadata_damage::ptr err(new super_block_corruption);
		err->set_message("checksum error");
		damage->push_back(err);
	}

	return damage;
}

//----------------------------------------------------------------
#endif