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Date: Thu, 12 Jun 2014 16:04:16 -0700 (PDT) From: Tom Herbert <therbert@...gle.com> To: davem@...emloft.net, netdev@...r.kernel.org Subject: [PATCH 3/4] net: add skb_pop_rcv_encapsulation This function is used by UDP encapsulation protocols in RX when crossing encapsulation boundary. If ip_summed is set to CHECKSUM_UNNECESSARY and encapsulation is not set, change to CHECKSUM_NONE since the checksum has not been validated within the encapsulation. Signed-off-by: Tom Herbert <therbert@...gle.com> --- include/linux/skbuff.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 5b5cd31..fdb510c 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1853,6 +1853,17 @@ static inline int pskb_network_may_pull(struct sk_buff *skb, unsigned int len) return pskb_may_pull(skb, skb_network_offset(skb) + len); } +static inline void skb_pop_rcv_encapsulation(struct sk_buff *skb) +{ + /* Only continue with checksum unnecessary if device indicated + * it is valid across encapsulation (skb->encapsulation was set). + */ + if (skb->ip_summed == CHECKSUM_UNNECESSARY && !skb->encapsulation) + skb->ip_summed = CHECKSUM_NONE; + + skb->encapsulation = 0; +} + /* * CPUs often take a performance hit when accessing unaligned memory * locations. The actual performance hit varies, it can be small if the -- 2.0.0.526.g5318336 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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