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From:   Yosry Ahmed <yosryahmed@google.com>
Date:   Mon, 10 Oct 2022 13:09:51 -0700
Message-ID: <CAJD7tkb6-X18Hfe9-At3vUF0NJPx75sc94YY-VRfxJE2u1CS7g@mail.gmail.com>
Subject: Re: [PATCH] cgroup: Fix crash with CLONE_INTO_CGROUP and v1 cgroups
To:     Tejun Heo <tj@kernel.org>
Cc:     "Christian A. Ehrhardt" <lk@c--e.de>,
        Christian Brauner <brauner@kernel.org>,
        syzbot <syzbot+534ee3d24c37c411f37f@syzkaller.appspotmail.com>,
        gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
        syzkaller-bugs@googlegroups.com,
        Martin KaFai Lau <martin.lau@linux.dev>
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On Mon, Oct 10, 2022 at 1:07 PM Tejun Heo <tj@kernel.org> wrote:
>
> Hello,
>
> On Mon, Oct 10, 2022 at 12:57:34PM -0700, Yosry Ahmed wrote:
> > Any suggestions for the new names though? Given that the new ones
> > would be the ones that will support both versions, I am not sure how
> > to name them differently in a meaningful way. Maybe something like
> > cgroup_get_all_from_[fd/file]() ?
>
> idk, cgroup12_get_from_[fd/file]()?
>
> > IMO, we can rename the current versions to
> > cgroup_get_dfl_from_[fd/file](), and the new ones (which support both)
> > as cgroup_get_from_fd/file(). In this case it's obvious that one
> > version specifically works on "dfl", aka cgroup2.
>
> It's kinda confusing because we've been assuming that these lookup functions
> are all cgroup2 only.
>
> Thanks.

Got it. Will send a patch shortly. Thanks!

>
> --
> tejun