From patchwork Fri Mar 19 21:47:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lorenzo@kernel.org" X-Patchwork-Id: 12151991 X-Patchwork-Delegate: bpf@iogearbox.net 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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 D93C8C433E3 for ; Fri, 19 Mar 2021 21:49:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C21816198E for ; Fri, 19 Mar 2021 21:49:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230507AbhCSVsq (ORCPT ); Fri, 19 Mar 2021 17:48:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:45598 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229942AbhCSVs0 (ORCPT ); Fri, 19 Mar 2021 17:48:26 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 62D3861986; Fri, 19 Mar 2021 21:48:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616190506; bh=tDqB0Ey7DwyVDYXMPU2eRxTOZD4Z/gsFYf6a8/8/tlo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ISUoFvsiX8lmD5IRJ/KxkRnnf9uaLL/P/NwOLYnwblMfS/Eeae1nMmIcmq5kn9RmQ s2kb7KuBZuitm1UY4VJWUQ1PVOEIJv2hT+gSw0014rX18+sIJirI/GrW22Dn89Dcu2 tV2nDMZcdZbJeisDiLWMboi7xBT0ZmbIasM/8IbDjEULKRZoRy2kamp7lUMcxg9u+Z QeXnEPOpBwDJS4doseIUlaWKpZzXT0PRLOI4nnAfszdCBN4aZA9PxFDYtynDUQ9rkJ RqaoZnJ6MeDFIHponhXIbEmY+ODk99b2f62VdvDxyzoy2SIRXuhmCSCi+YtGoymtdg c/gQk+lR0yPyw== From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: lorenzo.bianconi@redhat.com, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, shayagr@amazon.com, john.fastabend@gmail.com, dsahern@kernel.org, brouer@redhat.com, echaudro@redhat.com, jasowang@redhat.com, alexander.duyck@gmail.com, saeed@kernel.org, maciej.fijalkowski@intel.com, sameehj@amazon.com Subject: [PATCH v7 bpf-next 07/14] net: xdp: add multi-buff support to xdp_build_skb_from_fram Date: Fri, 19 Mar 2021 22:47:21 +0100 Message-Id: X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Introduce xdp multi-buff support to __xdp_build_skb_from_frame/xdp_build_skb_from_fram utility routines. Signed-off-by: Lorenzo Bianconi --- net/core/xdp.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/net/core/xdp.c b/net/core/xdp.c index 430f516259d9..7388bc6d680b 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -603,9 +603,21 @@ struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf, struct sk_buff *skb, struct net_device *dev) { + skb_frag_t frag_list[MAX_SKB_FRAGS]; unsigned int headroom, frame_size; + int i, num_frags = 0; void *hard_start; + /* XDP multi-buff frame */ + if (unlikely(xdpf->mb)) { + struct xdp_shared_info *xdp_sinfo; + + xdp_sinfo = xdp_get_shared_info_from_frame(xdpf); + num_frags = xdp_sinfo->nr_frags; + memcpy(frag_list, xdp_sinfo->frags, + sizeof(skb_frag_t) * num_frags); + } + /* Part of headroom was reserved to xdpf */ headroom = sizeof(*xdpf) + xdpf->headroom; @@ -624,6 +636,20 @@ struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf, if (xdpf->metasize) skb_metadata_set(skb, xdpf->metasize); + /* Single-buff XDP frame */ + if (likely(!num_frags)) + goto out; + + for (i = 0; i < num_frags; i++) { + struct page *page = xdp_get_frag_page(&frag_list[i]); + + skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, + page, xdp_get_frag_offset(&frag_list[i]), + xdp_get_frag_size(&frag_list[i]), + xdpf->frame_sz); + } + +out: /* Essential SKB info: protocol and skb->dev */ skb->protocol = eth_type_trans(skb, dev);