netdev - Re: [RFC 1/3] tc: fix return values of ingress qdisc

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Message-ID: <CAHA+R7NwAdc81bFSoqvXsTpzod0vzT-PV38_Q0N0WTUVGFUY-g@mail.gmail.com>
Date:	Tue, 21 Apr 2015 21:59:33 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [RFC 1/3] tc: fix return values of ingress qdisc

On Tue, Apr 21, 2015 at 12:27 PM, Alexei Starovoitov <ast@...mgrid.com> wrote:
> ingress qdisc should return NET_XMIT_* values just like all other qdiscs.
>

XMIT already means egress...

> Since it's invoked via qdisc_enqueue_root() (which suppose to return
> only NET_XMIT_* values as well), it was working by accident,
> since TC_ACT_* values fit within NET_XMIT_MASK.
>

Why not just add a BUILD_BUG_ON() to capture this?
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