netdev - Re: [patch net-next v3 01/10] net: sched: move tc_classify function to cls

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Message-ID: <CAM_iQpWgtqBYEPTcdKqx=52kpmLTUug173Zdq+7gS-pniswy_A@mail.gmail.com>
Date:   Tue, 16 May 2017 14:03:14 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        David Ahern <dsa@...ulusnetworks.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexander Duyck <alexander.h.duyck@...el.com>,
        Simon Horman <simon.horman@...ronome.com>, mlxsw@...lanox.com
Subject: Re: [patch net-next v3 01/10] net: sched: move tc_classify function
 to cls_api.c

On Tue, May 16, 2017 at 2:00 PM, Jiri Pirko <jiri@...nulli.us> wrote:
> Tue, May 16, 2017 at 10:25:35PM CEST, xiyou.wangcong@...il.com wrote:
>>On Tue, May 16, 2017 at 10:27 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>>> From: Jiri Pirko <jiri@...lanox.com>
>>>
>>> Move tc_classify function to cls_api.c where it belongs, rename it to
>>> fit the namespace.
>>>
>>
>>It is not a pure move, you silently remove the CONFIG_NET_CLS_ACT
>>macros in tc_classify(). Probably not buggy, just redundancy when
>>actions are not compiled.
>
> Plese see include/net/pkt_cls.h in this patch.
>
> If CONFIG_NET_CLS_ACT is not defined, there is a stub there.

I am sure it is not NET_CLS_ACT:


#ifdef CONFIG_NET_CLS
 void tcf_destroy_chain(struct tcf_proto __rcu **fl);
+int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+                struct tcf_result *res, bool compat_mode);
+
 #else
 static inline void tcf_destroy_chain(struct tcf_proto __rcu **fl)
 {
 }
+
+static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+                              struct tcf_result *res, bool compat_mode)
+{
+       return TC_ACT_UNSPEC;
+}
 #endif