Merge "libsnapshot: MapSnapshot: use device string for inner device"

    }

    if (linear_sectors) {

        std::string snap_dev;

        if (!dm.GetDeviceString(snap_name, &snap_dev)) {

            LOG(ERROR) << "Cannot determine major/minor for: " << snap_name;

            return false;

        }

        // Our stacking will looks like this:

        //     [linear, linear] ; to snapshot, and non-snapshot region of base device

        //     [snapshot-inner]

        //     [base device]   [cow]

        DmTable table;

        table.Emplace<DmTargetLinear>(0, snapshot_sectors, *dev_path, 0);

        table.Emplace<DmTargetLinear>(0, snapshot_sectors, snap_dev, 0);

        table.Emplace<DmTargetLinear>(snapshot_sectors, linear_sectors, base_device,

                                      snapshot_sectors);

        if (!dm.CreateDevice(name, table, dev_path, timeout_ms)) {