# Re: \[PATCH bpf-next v2 3/6\] selftests/bpf: move open\_tuntap to network helpers

- From: Willem de Bruijn \<willemdebruijn.kernel@gmail.com\>
- Date: 2025-02-18 01:50:37 
- List: netdev
- Page: https://ratatoskr.run/netdev/2025/02/2930695
- Thread: https://ratatoskr.run/netdev/2025/02/2930329/t.md

```text
Marcus Wichelmann wrote:
> To test the XDP metadata functionality of the tun driver, it's necessary
> to create a new tap device first. A helper function for this already
> exists in lwt_helpers.h. Move it to the common network helpers header,
> so it can be reused in other tests.
> 
> Signed-off-by: Marcus Wichelmann <redacted>

Reviewed-by: Willem de Bruijn <willemb@google.com>

Both tests that include lwt_helpers.h also include network_helpers.h,
so the linking with network_helpers.o is already addressed. This was
not entirely obvious from just reading the code.
```