netdev - Re: [PATCH v3 net-next 4/4] net/sched: act

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Date:   Thu, 6 Oct 2016 17:49:16 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     Shmulik Ladkani <shmulik.ladkani@...il.com>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH v3 net-next 4/4] net/sched: act_mirred: Implement ingress actions

On Thu, Oct 6, 2016 at 5:17 PM, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> I dont believe we need to bother with the return code in  this case.

Why?

For a quick example, STOLEN vs. SHOT:

        result = tc_classify(skb, filter, &res, false);
        if (result >= 0) {
#ifdef CONFIG_NET_CLS_ACT
                switch (result) {
                case TC_ACT_STOLEN:
                case TC_ACT_QUEUED:
                        *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
                case TC_ACT_SHOT:
                        return 0;
                }
#endif

Note, *qerr is the return value to ->enqueue().