From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 5150AC07E9B for ; Tue, 20 Jul 2021 13:02:12 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DB67A6101E for ; Tue, 20 Jul 2021 13:02:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB67A6101E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36320 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m5pNy-00028X-SE for qemu-devel@archiver.kernel.org; Tue, 20 Jul 2021 09:02:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51024) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m5pGS-0004t3-Pw for qemu-devel@nongnu.org; Tue, 20 Jul 2021 08:54:24 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:56097) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m5pGO-0008If-Jh for qemu-devel@nongnu.org; Tue, 20 Jul 2021 08:54:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626785660; 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=5lcuUhLpFx5x66QANuw8RMIjKw5nsdw9ExuMGaIhc24=; b=MIA3R9y8Y72O9wWsMUS/P0HpbeF+HdOm5zoqUmNUTrvS+8XjlIIovGQL2dXLIPPDc72vPC ru9anzPe2X5x+CMVIlHLaQe9dKwPTRirNfds/164xai6XeJ7MGWeKUfew/mU9hNPyWFVbL ExbNl0A/P6YM/MXElqUuUt03JsUEUr0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-373-rOLH2m6hNRG-G4MxDYf4ig-1; Tue, 20 Jul 2021 08:54:18 -0400 X-MC-Unique: rOLH2m6hNRG-G4MxDYf4ig-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B7A9D101F7A1 for ; Tue, 20 Jul 2021 12:54:17 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-114-187.ams2.redhat.com [10.36.114.187]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 07F3F60C82; Tue, 20 Jul 2021 12:54:14 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 18B39112D850; Tue, 20 Jul 2021 14:54:09 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH 12/16] vhost: Clean up how VhostOpts method vhost_get_config() fails Date: Tue, 20 Jul 2021 14:54:04 +0200 Message-Id: <20210720125408.387910-13-armbru@redhat.com> In-Reply-To: <20210720125408.387910-1-armbru@redhat.com> References: <20210720125408.387910-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.474, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , "Michael S . Tsirkin" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" vhost_user_get_config() can fail without setting an error. Unclean. Its caller vhost_dev_get_config() compensates by substituting a generic error then. Goes back to commit 50de51387f "vhost: Distinguish errors in vhost_dev_get_config()". Clean up by moving the generic error from vhost_dev_get_config() to all the failure paths that neglect to set an error. Cc: Kevin Wolf Cc: Michael S. Tsirkin Signed-off-by: Markus Armbruster --- hw/virtio/vhost-user.c | 2 ++ hw/virtio/vhost.c | 10 ++-------- 2 files changed, 4 insertions(+), 8 deletions(-) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 29ea2b4fce..dbbd6fbc25 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -2139,10 +2139,12 @@ static int vhost_user_get_config(struct vhost_dev *dev, uint8_t *config, msg.payload.config.offset = 0; msg.payload.config.size = config_len; if (vhost_user_write(dev, &msg, NULL, 0) < 0) { + error_setg_errno(errp, -EPROTO, "vhost_get_config failed"); return -EPROTO; } if (vhost_user_read(dev, &msg) < 0) { + error_setg_errno(errp, -EPROTO, "vhost_get_config failed"); return -EPROTO; } diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index dbbc6b6915..88f8a397dc 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1564,17 +1564,11 @@ void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits, int vhost_dev_get_config(struct vhost_dev *hdev, uint8_t *config, uint32_t config_len, Error **errp) { - ERRP_GUARD(); - int ret; - assert(hdev->vhost_ops); if (hdev->vhost_ops->vhost_get_config) { - ret = hdev->vhost_ops->vhost_get_config(hdev, config, config_len, errp); - if (ret < 0 && !*errp) { - error_setg_errno(errp, -ret, "vhost_get_config failed"); - } - return ret; + return hdev->vhost_ops->vhost_get_config(hdev, config, config_len, + errp); } error_setg(errp, "vhost_get_config not implemented"); -- 2.31.1