Re: [PATCH RESEND v5 2/5] namei: O_BENEATH-style path resolution flags

From: Linus Torvalds
Date: Sat Mar 09 2019 - 13:16:24 EST

On Sat, Mar 9, 2019 at 9:26 AM Christian Brauner <christian@xxxxxxxxxx> wrote:
> Aside from that I want to point out that it is non-trivial to do this in
> user space.

Oh, absolutely agreed. It's easy to do it in the kernel, and doing it
anywhere else ends up having horrible races that the kernel has to
deal with and has long solved anyway.

I've only seen this (2/5) patch, so I won't comment on the other ones,
but this still makes sense to me.

Al, comments?