From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next 0/1 v2] skbuff: Extend gso_type to unsigned int. Date: Sat, 08 Apr 2017 12:32:34 -0700 (PDT) Message-ID: <20170408.123234.1062158742988397943.davem@davemloft.net> References: <1491676584-22421-1-git-send-email-steffen.klassert@secunet.com> <1491676584-22421-2-git-send-email-steffen.klassert@secunet.com> <1491677732.10124.94.camel@edumazet-glaptop3.roam.corp.google.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: steffen.klassert@secunet.com, netdev@vger.kernel.org, edumazet@google.com, alexander.duyck@gmail.com To: eric.dumazet@gmail.com Return-path: Received: from shards.monkeyblade.net ([184.105.139.130]:50298 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751010AbdDHTck (ORCPT ); Sat, 8 Apr 2017 15:32:40 -0400 In-Reply-To: <1491677732.10124.94.camel@edumazet-glaptop3.roam.corp.google.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Sat, 08 Apr 2017 11:55:32 -0700 > On Sat, 2017-04-08 at 20:36 +0200, Steffen Klassert wrote: >> All available gso_type flags are currently in use, so >> extend gso_type from 'unsigned short' to 'unsigned int' >> to be able to add further flags. >> >> We reorder the struct skb_shared_info to use >> two bytes of the four byte hole before dataref. >> All fields before dataref are cleared, i.e. >> four bytes more than before the change. >> >> The remaining two byte hole is moved to the >> beginning of the structure, this protects us >> from immediate overwites on out of bound writes >> to the sk_buff head. > >> Signed-off-by: Steffen Klassert ... > This looks much better, thanks Steffen. > > Acked-by: Eric Dumazet Applied, thanks everyone.