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List: linux-api
Subject: Re: [PATCH v7 0/6] seccomp trap to userspace
From: Jann Horn <jannh () google ! com>
Date: 2018-09-28 22:48:51
Message-ID: CAG48ez1f7Cf-9J5wxnAt=NJ=SRuYLj75cNjCrCYmPH2=FypBdg () mail ! gmail ! com
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On Sat, Sep 29, 2018 at 12:47 AM Michael Kerrisk (man-pages)
<mtk.manpages@gmail.com> wrote:
> On Sat, 29 Sep 2018 at 00:35, Kees Cook <keescook@chromium.org> wrote:
> > On Fri, Sep 28, 2018 at 3:16 PM, Michael Kerrisk (man-pages)
> > <mtk.manpages@gmail.com> wrote:
> > > On Sat, 29 Sep 2018 at 00:04, Tycho Andersen <tycho@tycho.ws> wrote:
> > >> On Fri, Sep 28, 2018 at 11:57:40PM +0200, Michael Kerrisk (man-opages) wrote:
> > >> > On 09/27/2018 05:11 PM, Tycho Andersen wrote:
> > >> > > Here's v7 of the seccomp trap to userspace set. There are various minor
> > >> > > changes and bug fixes, but two major changes:
> > >> > >
> > >> > > * We now pass fds to the tracee via an ioctl, and do it immediately when
> > >> > > the ioctl is called. For this we needed some help from the vfs, so
> > >> > > I've put the one patch in this series and cc'd fsdevel. This does have
> > >> > > the advantage that the feature is now totally decoupled from the rest
> > >> > > of the set, which is itself useful (thanks Andy!)
> > >> > >
> > >> > > * Instead of putting all of the notification related stuff into the
> > >> > > struct seccomp_filter, it now lives in its own struct notification,
> > >> > > which is pointed to by struct seccomp_filter. This will save a lot of
> > >> > > memory (thanks Tyler!)
> > >> >
> > >> > Is there a documentation (man page) patch for this API change?
> > >>
> > >> Not yet, but once we decide on a final API I'll prepare one.
> > >
> > > Honestly, the production of such documentation should be part of the
> > > evolution towards the final API...
> > >
> > > Documentation is not an afterthought. It's a tool for pushing you, the
> > > developer (and others, your reviewers) to more deeply consider your
> > > design.
> >
> > In Tycho's defense, he did write up documentation in Documentation/
> > for the feature, so it won't be an afterthought. :)
>
> So, I missed that... How do I find this Documentation/ ?
It's in patch 1:
https://lore.kernel.org/lkml/20180927151119.9989-2-tycho@tycho.ws/
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