From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 406BCA04FD for ; Wed, 8 Jun 2022 14:50:07 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 064CC42B92; Wed, 8 Jun 2022 14:50:06 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id CA74042B7B for ; Wed, 8 Jun 2022 14:50:04 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1654692604; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=u4XQrNt2jAtHz9ezEGV/AGywYv85Fg0vdjV8V4+nAJQ=; b=Nxw2gLdoGbsXuFmwISUwdq0+WG8PwbHtjmOB1n5tm+Mna86voH2Yd9KH5ClW0dV+87kZkO cHhrgFXUakiNSD8U8bvdk15MyXAKkiubM1lqi6EZFItj9fACJUrJVIb6uC+3fxs0Vz0nK1 XqCiCRJQmYZv/5fRWh/nCerBRkU4p1g= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-534-6R6QizG7OzamyvZh9hvpjg-1; Wed, 08 Jun 2022 08:50:00 -0400 X-MC-Unique: 6R6QizG7OzamyvZh9hvpjg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C699D80013E; Wed, 8 Jun 2022 12:49:59 +0000 (UTC) Received: from max-t490s.redhat.com (unknown [10.39.208.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0B0E040CF8E8; Wed, 8 Jun 2022 12:49:57 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, jasowang@redhat.com, chenbo.xia@intel.com, david.marchand@redhat.com, olivier.matz@6wind.com, wenwux.ma@intel.com, yuying.zhang@intel.com, aman.deep.singh@intel.com Cc: Maxime Coquelin , stable@dpdk.org Subject: [PATCH v2 2/6] vhost: fix missing enqueue pseudo-header calculation Date: Wed, 8 Jun 2022 14:49:42 +0200 Message-Id: <20220608124946.102623-3-maxime.coquelin@redhat.com> In-Reply-To: <20220608124946.102623-1-maxime.coquelin@redhat.com> References: <20220608124946.102623-1-maxime.coquelin@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=maxime.coquelin@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org The Virtio specification requires that in case of checksum offloading, the pseudo-header checksum must be set in the L4 header. When received from another Vhost-user port, the packet checksum might already contain the pseudo-header checksum but we have no way to know it. So we have no other choice than doing the pseudo-header checksum systematically. This patch handles this using the rte_net_intel_cksum_prepare() helper. Fixes: 859b480d5afd ("vhost: add guest offload setting") Cc: stable@dpdk.org Signed-off-by: Maxime Coquelin Reviewed-by: Chenbo Xia --- lib/vhost/virtio_net.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c index 68a26eb17d..ce22e3ac79 100644 --- a/lib/vhost/virtio_net.c +++ b/lib/vhost/virtio_net.c @@ -596,6 +596,16 @@ virtio_enqueue_offload(struct rte_mbuf *m_buf, struct virtio_net_hdr *net_hdr) csum_l4 |= RTE_MBUF_F_TX_TCP_CKSUM; if (csum_l4) { + /* + * Pseudo-header checksum must be set as per Virtio spec. + * + * Note: We don't propagate rte_net_intel_cksum_prepare() + * errors, as it would have an impact on performance, and an + * error would mean the packet is dropped by the guest instead + * of being dropped here. + */ + rte_net_intel_cksum_prepare(m_buf); + net_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM; net_hdr->csum_start = m_buf->l2_len + m_buf->l3_len; -- 2.35.3