From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Aleksandrov Subject: Re: [PATCH] Date: Thu, 26 Sep 2013 17:40:03 +0200 Message-ID: <52445553.1030308@redhat.com> References: <1380204582-27144-1-git-send-email-nikolay@redhat.com> <1380204582-27144-2-git-send-email-nikolay@redhat.com> <1380209227.3165.176.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Daniel Borkmann , netdev@vger.kernel.org, davem@davemloft.net, andy@greyhouse.net, fubar@us.ibm.com, vfalico@redhat.com To: Eric Dumazet Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56926 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751158Ab3IZPnj (ORCPT ); Thu, 26 Sep 2013 11:43:39 -0400 In-Reply-To: <1380209227.3165.176.camel@edumazet-glaptop> Sender: netdev-owner@vger.kernel.org List-ID: On 09/26/2013 05:27 PM, Eric Dumazet wrote: > On Thu, 2013-09-26 at 16:09 +0200, Nikolay Aleksandrov wrote: >> Factor out the code that extracts the ports from skb_flow_dissect and >> add a new function skb_flow_get_ports which can be re-used. >> >> Suggested-by: Veaceslav Falico >> Signed-off-by: Nikolay Aleksandrov >> --- >> v2: new patch >> v3: fix a bug in skb_flow_dissect where thoff didn't have poff added by >> modifying thoff directly in skb_flow_get_ports as it's done anyway. >> Also add the necessary export symbol for skb_flow_get_ports. >> This seems like a good idea because there're other users that can re-use >> it later as well. > > Wait a minute.... existing code seems buggy. > > Daniel, any objection if I submit this fix ? > > (commit 8ed781668dd49b608f) > 1 question, I might be missing something but proto_ports_offset() gets the SPI with that 4 byte offset as is written in the comments, in every other case proto_ports_offset() is 0, so why would we want the SPI in the ->ports field ? And even then isn't it supposed to be 16 bits (2 bytes) and not 4, since we need to pass over "next header" (8 bits) and length (8 bits) ? Thanks, Nik