From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Herbert Subject: [PATCH net-next 1/2] net: add skb_checksum_complete_unset Date: Mon, 20 Apr 2015 14:10:04 -0700 Message-ID: <1429564205-1661247-2-git-send-email-tom@herbertland.com> References: <1429564205-1661247-1-git-send-email-tom@herbertland.com> Mime-Version: 1.0 Content-Type: text/plain To: Return-path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:47500 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754402AbbDTVKW (ORCPT ); Mon, 20 Apr 2015 17:10:22 -0400 Received: from pps.filterd (m0004348 [127.0.0.1]) by m0004348.ppops.net (8.14.5/8.14.5) with SMTP id t3KL9osK021545 for ; Mon, 20 Apr 2015 14:10:21 -0700 Received: from mail.thefacebook.com ([199.201.64.23]) by m0004348.ppops.net with ESMTP id 1tw7pwr4y6-1 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT) for ; Mon, 20 Apr 2015 14:10:21 -0700 Received: from facebook.com (2401:db00:20:702e:face:0:23:0) by mx-out.facebook.com (10.212.236.89) with ESMTP id a6fd948ee7a111e487e00002c95209d8-492a72c0 for ; Mon, 20 Apr 2015 14:10:20 -0700 In-Reply-To: <1429564205-1661247-1-git-send-email-tom@herbertland.com> Sender: netdev-owner@vger.kernel.org List-ID: This function changes ip_summed to CHECKSUM_NONE if CHECKSUM_COMPLETE is set. This is called to discard checksum-complete when packet is being modified and checksum is not pulled for headers in a layer. Signed-off-by: Tom Herbert --- include/linux/skbuff.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 0991259..06793b5 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3016,6 +3016,18 @@ static inline bool __skb_checksum_validate_needed(struct sk_buff *skb, */ #define CHECKSUM_BREAK 76 +/* Unset checksum-complete + * + * Unset checksum complete can be done when packet is being modified + * (uncompressed for instance) and checksum-complete value is + * invalidated. + */ +static inline void skb_checksum_complete_unset(struct sk_buff *skb) +{ + if (skb->ip_summed == CHECKSUM_COMPLETE) + skb->ip_summed = CHECKSUM_NONE; +} + /* Validate (init) checksum based on checksum complete. * * Return values: -- 1.8.1