netdev - Re: [PATCH net-next v5 1/4] net/sched: user-space can't set unknown tcfa

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Message-ID: <f455f493-c106-aa93-b92a-2aa94c969d31@mojatatu.com>
Date:   Mon, 30 Jul 2018 10:03:50 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Daniel Borkmann <daniel@...earbox.net>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Eyal Birger <eyal.birger@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next v5 1/4] net/sched: user-space can't set unknown
 tcfa_action values

On 30/07/18 08:30 AM, Paolo Abeni wrote:
>   	}
>   
> +	if (!tcf_action_valid(a->tcfa_action)) {
> +		NL_SET_ERR_MSG(extack, "invalid action value, using TC_ACT_UNSPEC instead");
> +		a->tcfa_action = TC_ACT_UNSPEC;
> +	}
> +
>   	return a;
>   


I think it would make a lot more sense to just reject the entry than
changing it underneath the user to a default value. Least element of
suprise.

cheers,
jamal