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

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Date:   Wed, 26 Jul 2017 22:59:19 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     Cong Wang <xiyou.wangcong@...il.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 03:01:32PM -0700, Cong Wang wrote:
>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())?

My logic was that if CONFIG_SOCK_CGROUP_DATA is disabled, then all sockets have the same default classid ==> 0, rather than having to deal with whether that config is enabled or not.

>> +
>> +               nla_put(skb, INET_DIAG_CLASS_ID, sizeof(classid), &classid);
>
>nla_put_u32()

Will fix, thanks!

-- 

Thanks,
Sasha