Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Feedback-ID: i21f147d5:Fastmail
Date:   Mon, 27 Mar 2023 07:06:44 -0600
From:   Tycho Andersen <tycho@tycho.pizza>
To:     Christian Brauner <brauner@kernel.org>
Cc:     aloktiagi <aloktiagi@gmail.com>, viro@zeniv.linux.org.uk,
        willy@infradead.org, David.Laight@aculab.com,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        keescook@chromium.org, hch@infradead.org
Subject: Re: [RFC v4 2/2] file, epoll: Implement do_replace() and
 eventpoll_replace()
Message-ID: <ZCGU5JBg02+DU6JN@tycho.pizza>
References: <20230324063422.1031181-2-aloktiagi@gmail.com>
 <ZBzRfDnHaEycE72s@ip-172-31-38-16.us-west-2.compute.internal>
 <20230324082344.xgze2vu3ds2kubcz@wittgenstein>
 <ZB2o8cs+VTQlz5GA@tycho.pizza>
 <20230327090106.zylztuk77vble7ye@wittgenstein>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230327090106.zylztuk77vble7ye@wittgenstein>
Precedence: bulk

On Mon, Mar 27, 2023 at 11:01:06AM +0200, Christian Brauner wrote:
> On Fri, Mar 24, 2023 at 07:43:13AM -0600, Tycho Andersen wrote:
> > Perhaps we could add a flag that people could set from SECCOMP_ADDFD
> > asking for this extra behavior?
> 
>         +       if (fd > 0 && addfd->ioctl_flags & SECCOMP_ADDFD_FLAG_EPOLL) {
>         +               /*
>         +                * - retrieve old struct file that addfd->fd refered to if any.
>         +                * - call your epoll seccomp api to update the references in the epoll instance
>         +                */
> 			epoll_seccomp_notify()
>         +       }
>         +
>         +       if (fd > 0 && addfd->ioctl_flags & SECCOMP_ADDFD_FLAG_IO_URING) {
>         +               /*
>         +                * - call your io_uring seccomp api to update the references in the io_uring instance
>         +                */
> 			io_uring_seccomp_notify()
>         +       }

Looks reasonable to me, thanks.

Tycho