From patchwork Fri Jul 9 11:10:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 472644 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D1E2C07E9E for ; Fri, 9 Jul 2021 11:10:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7E51761369 for ; Fri, 9 Jul 2021 11:10:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230383AbhGILNf (ORCPT ); Fri, 9 Jul 2021 07:13:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:52442 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229641AbhGILNe (ORCPT ); Fri, 9 Jul 2021 07:13:34 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1E0BF613D6; Fri, 9 Jul 2021 11:10:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625829051; bh=oydCl5SC8mTDWkWcTTMhZldv5aPmKHXOWDlXgdsn6No=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hx+HgWKENwTuo/RuCLVSrd0dxu+dnKiRSXbnTQ496oHyef4buY2JrKSb7blS6+WSg 7lwUxLqFRlaa4gyGWrzWIeh1xj5Z2XBo/XnVC4dDatWN24hca2KIQedqRDv+DzQYpv /e851+/QK/v+uQu54/BlU4wW7Kekid9ZjRdVt7H9OIhTPYOBHhT1bBrUa+52PeqYJn jDxP5b2fh+8h3vJywykXDPtVOpEs+RIybvxM1dt5QokAaXyoDA1QVZeYqMLx0/kgy1 BqNh61N4+N6gQLmhWxEKkRxYslmTcGtJkeUdMGp+GYAWH65cP5GLNPMUoihu5kKwn0 OT3pfwFFpC/eA== From: Lorenzo Bianconi To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, alexander.duyck@gmail.com, brouer@redhat.com, echaudro@redhat.com, magnus.karlsson@intel.com, tirthendu.sarkar@intel.com, toke@redhat.com Subject: [PATCH bpf-next 1/2] net: skbuff: add xdp_frags_tsize field to skb_shared_info Date: Fri, 9 Jul 2021 13:10:27 +0200 Message-Id: <2a37aaa826807751478a2003b83ccb9838323b17.1625828537.git.lorenzo@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org xdp_frags_tsize field will be used to store paged frame truesize for xdp_buff/xdp_frame. In order to not increase skb_shared_info size we will use a hole due to skb_shared_info alignment. gso_type filed will be used to store paged frame size. This is a preliminary patch to properly support xdp multi-buff Signed-off-by: Lorenzo Bianconi --- include/linux/skbuff.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index f19190820e63..0e345c5ccb4f 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -522,6 +522,7 @@ struct skb_shared_info { unsigned short gso_segs; struct sk_buff *frag_list; struct skb_shared_hwtstamps hwtstamps; + /* used for xdp_{buff,frame} paged size */ unsigned int gso_type; u32 tskey; @@ -529,6 +530,7 @@ struct skb_shared_info { * Warning : all fields before dataref are cleared in __alloc_skb() */ atomic_t dataref; + unsigned int xdp_frags_tsize; /* Intermediate layers must ensure that destructor_arg * remains valid until skb destructor */