From patchwork Mon Jul 10 23:04:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 1806085 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=Ku5xUJ+m; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4R0KRs5HRyz20bx for ; Tue, 11 Jul 2023 09:08:25 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qIzve-0008P2-0Z; Mon, 10 Jul 2023 19:04:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qIzva-000843-SE for qemu-devel@nongnu.org; Mon, 10 Jul 2023 19:04:23 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qIzvZ-0004UN-9n for qemu-devel@nongnu.org; Mon, 10 Jul 2023 19:04:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1689030260; 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=fHmhGhTSD6X74P22Q0DAjxHl108XBojNde1QZNnDoCw=; b=Ku5xUJ+m7c/QB0ttv0JccmGd0tpA0j3JPkbiUcBvRtOd2rSUZxbK+sui0fjrz1Z6EQ3Fbg ye/W12VDXJ44742VN5Zg8XnFhl2RguMlBeNTOM0gNSD4MtpdQRBn2hbBpWrZq3W7rRzL6r IlF4wwt4oQPOVTrI46KiwIDQBL7V20Y= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-601-9sC7DBvZMw6xkIvuwR1MgQ-1; Mon, 10 Jul 2023 19:04:19 -0400 X-MC-Unique: 9sC7DBvZMw6xkIvuwR1MgQ-1 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-3fa8db49267so31649285e9.3 for ; Mon, 10 Jul 2023 16:04:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689030257; x=1691622257; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fHmhGhTSD6X74P22Q0DAjxHl108XBojNde1QZNnDoCw=; b=ds47wJF2TvIFHznB9tL5mE3TuPvpWPQg/5h9vYShRB3fdzOH8iw6MnSvr0GI8Ga8Rz KTs1/r6f6BA/vGTYCgi5AFcKgLZH7+2sAHF4Q2OtoEWKZRmAq1nOr6JhpuLPISkq+tR9 o+MEBk69EKEycuNR79hYFQJSv8x0HZAC0Q9teFqjidwO4XsUSxHvzX++mma+82/vr6UF U+l6qcE36E3B2sQJmyTEs8010ELvM9nuOueXrU/384QamQbyaIFf3C1/gEoiKZwselgH t+sy+F9jhxmO7DQmW0FxB00Y/siZus9VYz43D4cI3yu2stKZvt2f3E4D9gtIHCXh9uXZ JUdg== X-Gm-Message-State: ABy/qLZtnelU3mEcYSEHS4UHkJoBDNR1tacM7327O/RgyKEM5BNozsnt UWs/qOgVSoVzGx+gYXuaC9MeF7npxDlFh26DAJJprhXeJuCkbi3UeV+9VI7wH2rsrKOYKlw7NHt sDi+Iuae+x4Ghxll18il68E3sMPPaq8ZwPS2rUBeQ4ATqNlJgPBOedJ2NOcpjKEvWKj4l X-Received: by 2002:a1c:6a0c:0:b0:3f7:e3dd:8a47 with SMTP id f12-20020a1c6a0c000000b003f7e3dd8a47mr12333313wmc.11.1689030257798; Mon, 10 Jul 2023 16:04:17 -0700 (PDT) X-Google-Smtp-Source: APBJJlHZGRlZ9eTrTscuHnI0NJMB37SWi28REPbq4btp7AF9RH5NQg2TcmWntxhbIzp3bZZ7KUGm5A== X-Received: by 2002:a1c:6a0c:0:b0:3f7:e3dd:8a47 with SMTP id f12-20020a1c6a0c000000b003f7e3dd8a47mr12333294wmc.11.1689030257528; Mon, 10 Jul 2023 16:04:17 -0700 (PDT) Received: from redhat.com ([2.52.3.112]) by smtp.gmail.com with ESMTPSA id m4-20020a05600c280400b003fc07e17d4esm7623082wmb.2.2023.07.10.16.04.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jul 2023 16:04:17 -0700 (PDT) Date: Mon, 10 Jul 2023 19:04:15 -0400 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , Hawkins Jiawei , Jason Wang , Eugenio =?utf-8?b?UMOpcmV6?= , Lei Yang Subject: [PULL 38/66] vdpa: Return -EIO if device ack is VIRTIO_NET_ERR in _load_mq() Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass client-ip=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Hawkins Jiawei According to VirtIO standard, "The class, command and command-specific-data are set by the driver, and the device sets the ack byte. There is little it can do except issue a diagnostic if ack is not VIRTIO_NET_OK." Therefore, QEMU should stop sending the queued SVQ commands and cancel the device startup if the device's ack is not VIRTIO_NET_OK. Yet the problem is that, vhost_vdpa_net_load_mq() returns 1 based on `*s->status != VIRTIO_NET_OK` when the device's ack is VIRTIO_NET_ERR. As a result, net->nc->info->load() also returns 1, this makes vhost_net_start_one() incorrectly assume the device state is successfully loaded by vhost_vdpa_net_load() and return 0, instead of goto `fail` label to cancel the device startup, as vhost_net_start_one() only cancels the device startup when net->nc->info->load() returns a negative value. This patch fixes this problem by returning -EIO when the device's ack is not VIRTIO_NET_OK. Fixes: f64c7cda69 ("vdpa: Add vhost_vdpa_net_load_mq") Signed-off-by: Hawkins Jiawei Acked-by: Jason Wang Acked-by: Eugenio Pérez Message-Id: Tested-by: Lei Yang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- net/vhost-vdpa.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 345a301d62..8477ed2579 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -677,8 +677,11 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, if (unlikely(dev_written < 0)) { return dev_written; } + if (*s->status != VIRTIO_NET_OK) { + return -EIO; + } - return *s->status != VIRTIO_NET_OK; + return 0; } static int vhost_vdpa_net_load_offloads(VhostVDPAState *s,