netdev - Re: [PATCH net-next v3 1/4] net/sched: Add skb->hash field editing via act

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Message-ID: <e2741150-466c-576f-5534-c20339c886e1@gmail.com>
Date:   Tue, 14 Jul 2020 19:14:30 -0600
From:   David Ahern <dsahern@...il.com>
To:     Ariel Levkovich <lariel@...lanox.com>, netdev@...r.kernel.org
Cc:     jiri@...nulli.us, kuba@...nel.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, ast@...nel.org, daniel@...earbox.net,
        Jiri Pirko <jiri@...lanox.com>
Subject: Re: [PATCH net-next v3 1/4] net/sched: Add skb->hash field editing
 via act_skbedit

On 7/11/20 3:28 PM, Ariel Levkovich wrote:
> @@ -156,6 +173,17 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
>  			flags |= SKBEDIT_F_INHERITDSFIELD;
>  	}
>  
> +	if (tb[TCA_SKBEDIT_HASH] != NULL) {
> +		hash_alg = nla_get_u32(tb[TCA_SKBEDIT_HASH]);
> +		if (hash_alg > TCA_SKBEDIT_HASH_ALG_ASYM_L4)
> +			return -EINVAL;

tcf_skbedit_init has an extack argument, so fill in a message stating
why it is failing EINVAL.