From patchwork Fri Jan 13 08:00:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heng Qi X-Patchwork-Id: 13100209 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9F18C677F1 for ; Fri, 13 Jan 2023 08:01:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240678AbjAMIBy (ORCPT ); Fri, 13 Jan 2023 03:01:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48034 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240759AbjAMIBP (ORCPT ); Fri, 13 Jan 2023 03:01:15 -0500 Received: from out30-6.freemail.mail.aliyun.com (out30-6.freemail.mail.aliyun.com [115.124.30.6]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 137246DB85; Fri, 13 Jan 2023 00:00:24 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R271e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045168;MF=hengqi@linux.alibaba.com;NM=1;PH=DS;RN=12;SR=0;TI=SMTPD_---0VZU0KJz_1673596819; Received: from localhost(mailfrom:hengqi@linux.alibaba.com fp:SMTPD_---0VZU0KJz_1673596819) by smtp.aliyun-inc.com; Fri, 13 Jan 2023 16:00:19 +0800 From: Heng Qi To: netdev@vger.kernel.org, bpf@vger.kernel.org Cc: Jason Wang , "Michael S . Tsirkin" , Paolo Abeni , Jakub Kicinski , John Fastabend , "David S . Miller" , Daniel Borkmann , Alexei Starovoitov , Eric Dumazet , Xuan Zhuo Subject: [PATCH net-next v4 03/10] virtio-net: set up xdp for multi buffer packets Date: Fri, 13 Jan 2023 16:00:09 +0800 Message-Id: <20230113080016.45505-4-hengqi@linux.alibaba.com> X-Mailer: git-send-email 2.19.1.6.gb485710b In-Reply-To: <20230113080016.45505-1-hengqi@linux.alibaba.com> References: <20230113080016.45505-1-hengqi@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org When the xdp program sets xdp.frags, which means it can process multi-buffer packets over larger MTU, so we continue to support xdp. Signed-off-by: Heng Qi Reviewed-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 87226dd8d262..60e199811212 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3097,9 +3097,9 @@ static int virtnet_xdp_set(struct net_device *dev, struct bpf_prog *prog, return -EINVAL; } - if (dev->mtu > max_sz) { - NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP"); - netdev_warn(dev, "XDP requires MTU less than %lu\n", max_sz); + if (prog && !prog->aux->xdp_has_frags && dev->mtu > max_sz) { + NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP without frags"); + netdev_warn(dev, "single-buffer XDP requires MTU less than %u\n", max_sz); return -EINVAL; }