unpack_block_time
unpack_block_time(block_time, &exception_block, &exception_time);
unpack_block_time(le64_to_cpu(*value_le), &b, &t);
unpack_block_time(le64_to_cpu(v1_le), &b1, &t);
unpack_block_time(le64_to_cpu(v2_le), &b2, &t);