# Re: \[PATCH 9/9\] netfilter: implement xt\_cgroup cgroup2 path match

- From: Jan Engelhardt \<hidden\>
- Date: 2015-11-21 20:26:31 
- List: netdev
- Page: https://ratatoskr.run/netdev/2015/11/4625756
- Thread: https://ratatoskr.run/netdev/2015/11/4625692/t.md

```text

On Saturday 2015-11-21 19:54, Florian Westphal wrote:
>
>The only other question I have is wheter PATH_MAX might be a possible
>ABI breaker in future.  It would have to be guaranteed that this is the
>same size forever, else you'd get strange errors on rule insertion if
>the sizes of the kernel and userspace version differs.
>
The same goes for IFNAMSIZ. But, so far, nobody changed it in the kernel,
even though there are voices that 15 characters + '\0' were a tight choice.
```