netdev - Re: [PATCH] net: inet: diag: expose sockets cgroup classid

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Date:   Wed, 26 Jul 2017 15:01:32 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Cc:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuznet@....inr.ac.ru" <kuznet@....inr.ac.ru>,
        "yoshfuji@...ux-ipv6.org" <yoshfuji@...ux-ipv6.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: inet: diag: expose sockets cgroup classid

On Wed, Jul 26, 2017 at 10:22 AM, Levin, Alexander (Sasha Levin)
<alexander.levin@...izon.com> wrote:
> +       if (ext & (1 << (INET_DIAG_CLASS_ID - 1))) {
> +               u32 classid = 0;
> +
> +#ifdef CONFIG_SOCK_CGROUP_DATA
> +               classid = sock_cgroup_classid(&sk->sk_cgrp_data);
> +#endif


If CONFIG_SOCK_CGROUP_DATA is not enabled, should we put 0
or put nothing (that is, skipping this nla_put())?

> +
> +               nla_put(skb, INET_DIAG_CLASS_ID, sizeof(classid), &classid);

nla_put_u32()

Thanks.