From patchwork Fri Jun 19 14:32:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 223720 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 6F91BC433DF for ; Fri, 19 Jun 2020 16:37:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F65E2158C for ; Fri, 19 Jun 2020 16:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592584665; bh=ByaBwvM0x9jrCerVOvexAYwUk8Y6Xv2hRaX91b41Llk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=l0b5dOxCa5JLYIyb4iuy1HifKd5jIJFvF7+1G3bNaXxMni1o+T8j8RzXDqbZ33A4t ldlpJ74MkWpG7LMMpZiUhoJ3UEJJhFTEl7i77ybbNi6/q5Cvv9UKPwLsv7g7ioOQGK gR/fd3BaFHkWleKias+wy8aRpiSfalDINHuLjfx8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389108AbgFSQhi (ORCPT ); Fri, 19 Jun 2020 12:37:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:40670 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388374AbgFSOsX (ORCPT ); Fri, 19 Jun 2020 10:48:23 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A299420DD4; Fri, 19 Jun 2020 14:48:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578103; bh=ByaBwvM0x9jrCerVOvexAYwUk8Y6Xv2hRaX91b41Llk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o7a6qnMyEDBqsuAznBdyf+05YMLYD+hnYdQ1g0v07u/s8YQzyqm7pi5vgPTWrzXjK qbUV7xb91WNKwEqoLSIpCSrlXYFdhOgaMJHCsEI8+1PHZzoPJ9kEO3uxGqpOFJ9fzf 5YCNAOmr35EIvWe2ebAcyyIRG7eXGloFBMHoo3lw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jesper Dangaard Brouer , Alexei Starovoitov , Jeff Kirsher , Sasha Levin Subject: [PATCH 4.14 083/190] ixgbe: Fix XDP redirect on archs with PAGE_SIZE above 4K Date: Fri, 19 Jun 2020 16:32:08 +0200 Message-Id: <20200619141637.739759890@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141633.446429600@linuxfoundation.org> References: <20200619141633.446429600@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jesper Dangaard Brouer [ Upstream commit 88eb0ee17b2ece64fcf6689a4557a5c2e7a89c4b ] The ixgbe driver have another memory model when compiled on archs with PAGE_SIZE above 4096 bytes. In this mode it doesn't split the page in two halves, but instead increment rx_buffer->page_offset by truesize of packet (which include headroom and tailroom for skb_shared_info). This is done correctly in ixgbe_build_skb(), but in ixgbe_rx_buffer_flip which is currently only called on XDP_TX and XDP_REDIRECT, it forgets to add the tailroom for skb_shared_info. This breaks XDP_REDIRECT, for veth and cpumap. Fix by adding size of skb_shared_info tailroom. Maintainers notice: This fix have been queued to Jeff. Fixes: 6453073987ba ("ixgbe: add initial support for xdp redirect") Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Alexei Starovoitov Cc: Jeff Kirsher Link: https://lore.kernel.org/bpf/158945344946.97035.17031588499266605743.stgit@firesoul Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index ba184287e11f..64ee45b6680a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -2274,7 +2274,8 @@ static void ixgbe_rx_buffer_flip(struct ixgbe_ring *rx_ring, rx_buffer->page_offset ^= truesize; #else unsigned int truesize = ring_uses_build_skb(rx_ring) ? - SKB_DATA_ALIGN(IXGBE_SKB_PAD + size) : + SKB_DATA_ALIGN(IXGBE_SKB_PAD + size) + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) : SKB_DATA_ALIGN(size); rx_buffer->page_offset += truesize;