From: Wei Yongjun <yjwei@cn.fujitsu.com>
Date: Fri, 1 Aug 2008 03:46:47 +0000 (-0700)
Subject: ipv6: Fix ip6_xmit to send fragments if ipfragok is true
X-Git-Tag: v2.6.27-rc2~102^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=77e2f14f71d68d05945f1d30ca55b5194d6ab1ce;p=pandora-kernel.git

ipv6: Fix ip6_xmit to send fragments if ipfragok is true

SCTP used ip6_xmit() to send fragments after received ICMP packet too
big message. But while send packet used ip6_xmit, the skb->local_df is
not initialized. So when skb if enter ip6_fragment(), the following
code will discard the skb.

ip6_fragment(...)
{
    if (!skb->local_df) {
        ...
        return -EMSGSIZE;
    }
    ...
}

SCTP do the following step:
1. send packet ip6_xmit(skb, ipfragok=0)
2. received ICMP packet too big message
3. if PMTUD_ENABLE: ip6_xmit(skb, ipfragok=1)

This patch fixed the problem by set local_df if ipfragok is true.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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