static void report_unsupported_feature(BlockDriverState *bs,
    Error **errp, Qcow2Feature *table, uint64_t mask)
{
    while (table && table->name[0] != '\0') {
        if (table->type == QCOW2_FEAT_TYPE_INCOMPATIBLE) {
            if (mask & (1 << table->bit)) {
                report_unsupported(bs, errp, "%.46s", table->name);
                mask &= ~(1 << table->bit);
            }
        }
        table++;
    }

    if (mask) {
        report_unsupported(bs, errp, "Unknown incompatible feature: %" PRIx64,
                           mask);
    }
}
Unknown