linux-kernel - Re: [RFC PATCH] seccomp: Add extensibility mechanism to read notifications

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Message-ID: <20200615134406.GA2893648@cisco>
Date:   Mon, 15 Jun 2020 07:44:06 -0600
From:   Tycho Andersen <tycho@...ho.ws>
To:     Sargun Dhillon <sargun@...gun.me>
Cc:     Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
        Aleksa Sarai <cyphar@...har.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        containers@...ts.linux-foundation.org, linux-api@...r.kernel.org
Subject: Re: [RFC PATCH] seccomp: Add extensibility mechanism to read
 notifications

On Sat, Jun 13, 2020 at 12:26:09AM -0700, Sargun Dhillon wrote:
> This introduces an extensibility mechanism to receive seccomp
> notifications. It uses read(2), as opposed to using an ioctl. The listener
> must be first configured to write the notification via the
> SECCOMP_IOCTL_NOTIF_CONFIG ioctl with the fields that the user is
> interested in.

I think we're not supposed to use read for control any more, because
"read is for data".

Tycho