netdev - Re: [PATCH ipsec-next 04/11] xfrm: remove output indirection from xfrm

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Message-ID: <20190328111247.GA19967@bistromath.localdomain>
Date:   Thu, 28 Mar 2019 12:12:47 +0100
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     Florian Westphal <fw@...len.de>
Cc:     netdev@...r.kernel.org, steffen.klassert@...unet.com
Subject: Re: [PATCH ipsec-next 04/11] xfrm: remove output indirection from
 xfrm_mode

Hi Florian,

2019-03-27, 18:31:33 +0100, Florian Westphal wrote:
> diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
> index 9333153bafda..01eb142ba6d0 100644
> --- a/net/xfrm/xfrm_output.c
> +++ b/net/xfrm/xfrm_output.c
[snip]
> +static int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
> +{

Why no #if IS_ENABLED here? (and in xfrm6_prepare_output)

> +	int err;
> +
> +	err = xfrm_inner_extract_output(x, skb);
> +	if (err)
> +		return err;
> +
> +	IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
> +	skb->protocol = htons(ETH_P_IP);
> +
> +	return x->outer_mode->output2(x, skb);
> +}
> +
> +static int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
> +{
> +	int err;
> +
> +	err = xfrm_inner_extract_output(x, skb);
> +	if (err)
> +		return err;
> +
> +	skb->ignore_df = 1;
> +	skb->protocol = htons(ETH_P_IPV6);
> +
> +	return x->outer_mode->output2(x, skb);
> +}
> +
> +static int xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb)
> +{
> +	switch (x->outer_mode->encap) {
> +	case XFRM_MODE_BEET:
> +	case XFRM_MODE_TUNNEL:
> +		if (x->outer_mode->family == AF_INET)
> +			return xfrm4_prepare_output(x, skb);
> +		if (x->outer_mode->family == AF_INET6)
> +			return xfrm6_prepare_output(x, skb);

Missing "break;" here?

> +	case XFRM_MODE_TRANSPORT:
> +		if (x->outer_mode->family == AF_INET)
> +			return xfrm4_transport_output(x, skb);
> +		if (x->outer_mode->family == AF_INET6)
> +			return xfrm6_transport_output(x, skb);
> +		break;
> +	case XFRM_MODE_ROUTEOPTIMIZATION:
> +		if (x->outer_mode->family == AF_INET6)
> +			return xfrm6_ro_output(x, skb);
> +		WARN_ON_ONCE(1);

Missing "break;" here too?

> +	default:
> +		WARN_ON_ONCE(1);
> +		break;
> +	}
> +
> +	return -EOPNOTSUPP;
> +}

-- 
Sabrina