netdev - Re: [PATCH 1/2] Disable forwarding of LRO skbs

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Date:	Thu, 01 May 2008 02:51:37 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	kmansley@...arflare.com, shemminger@...tta.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] Disable forwarding of LRO skbs

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Wed, 30 Apr 2008 22:51:26 +0100

> Add skb_warn_if_lro() to test whether an skb was received with LRO and
> warn if so.
> 
> Change br_forward(), ip_forward() and ip6_forward() to call
> skb_warn_if_lro() and discard the skb if it returns true.

This skb_is_gso() test should be inline.

So, instead make this something like:

include/linux/skbuff.h:

extern bool __skb_warn_if_lro(const struct sk_buff *skb);

static inline bool skb_warn_if_lro(const struct sk_buff *skb)
{
	if (unlikely(skb_is_gso(skb)))
		return __skb_warn_if_lro(skb);
	return false;
}

net/core/skbuff.c:

bool skb_warn_if_lro(const struct sk_buff *skb)
{
	if (net_ratelimit())
		pr_warning("%s: received packets cannot be forwarded"
			   " while LRO is enabled\n", skb->dev->name);
	return true;
}

Can you make this correction and resubmit this patch?

The second one looks fine to me, you don't need to resubmit
that one.

Thanks!
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