# Re: \[PATCH\] statx: reject unknown flags when using NULL path

- From: Eric Biggers \<hidden\>
- Date: 2017-03-20 17:12:15 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2017/03/119330
- Thread: https://ratatoskr.run/linux-fsdevel/2017/03/119331/t.md

```text
On Fri, Mar 10, 2017 at 10:58:23PM -0800, Eric Biggers wrote:
> From: Eric Biggers <redacted>
> 
> The statx() system call currently accepts unknown flags when called with
> a NULL path to operate on a file descriptor.  Left unchanged, this could
> make it hard to introduce new query flags in the future, since
> applications may not be able to tell whether a given flag is supported.
> 
> Fix this by failing the system call with EINVAL if any flags other than
> KSTAT_QUERY_FLAGS are specified in combination with a NULL path.
> 

Does anyone have comments on this patch?

I really think we need to get this in before v4.11 is released, since it deals
with the API.

- Eric
```