netdev - Re: [patch net-next RFC 1/9] net_sch: red: Add offload ability to RED qdisc

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Message-Id: <20171030.212015.742241045938302800.davem@davemloft.net>
Date:   Mon, 30 Oct 2017 21:20:15 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     jiri@...nulli.us
Cc:     netdev@...r.kernel.org, nogahf@...lanox.com, jhs@...atatu.com,
        xiyou.wangcong@...il.com, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com,
        simon.horman@...ronome.com, pieter.jansenvanvuuren@...ronome.com,
        john.hurley@...ronome.com, alexander.h.duyck@...el.com,
        ogerlitz@...lanox.com, john.fastabend@...il.com
Subject: Re: [patch net-next RFC 1/9] net_sch: red: Add offload ability to
 RED qdisc

From: Jiri Pirko <jiri@...nulli.us>
Date: Mon, 30 Oct 2017 09:56:05 +0100

> diff --git a/include/uapi/linux/pkt_sched.h b/include/uapi/linux/pkt_sched.h
> index 0e88cc2..743c42a 100644
> --- a/include/uapi/linux/pkt_sched.h
> +++ b/include/uapi/linux/pkt_sched.h
> @@ -255,6 +255,7 @@ struct tc_red_qopt {
>  #define TC_RED_ECN		1
>  #define TC_RED_HARDDROP		2
>  #define TC_RED_ADAPTATIVE	4
> +#define TC_RED_OFFLOADED	8
>  };
>  
>  struct tc_red_xstats {

What keeps a user from setting this flag in the tc_red_qopt it
passes into the a change operation?