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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 BF6CBC4320E for ; Fri, 27 Aug 2021 04:59:26 +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 689AE60F92 for ; Fri, 27 Aug 2021 04:59:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 689AE60F92 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:53642 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mJTxd-0001aI-FZ for qemu-devel@archiver.kernel.org; Fri, 27 Aug 2021 00:59:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60728) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJTpV-0008SI-Py for qemu-devel@nongnu.org; Fri, 27 Aug 2021 00:51:01 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:27630) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJTpP-0000x4-SU for qemu-devel@nongnu.org; Fri, 27 Aug 2021 00:51:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630039855; 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=KbP8ehGUI+ZOMO7IyFP6ePTXBQRiVQ0KsBAVyiE8Yz0=; b=HsBCKK+TgqfaJKWk+13vMGWgbO57dre3uy8dntANH/maw25Fcez5PLJop21f1lZz4cY1IJ m8ZwfXnfDNdvpuphFRUf2ohYkjCUR6bV35hD2QOe9AIROJeZGA0zGl+bwrZCA0ML9xA6CH 6G/KIS8u2Vw76d/LSaJ3KH1OtPQAWRc= 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-187-7xo7t6cfMlykd4Fu1J4kqQ-1; Fri, 27 Aug 2021 00:50:53 -0400 X-MC-Unique: 7xo7t6cfMlykd4Fu1J4kqQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1C3C81008066; Fri, 27 Aug 2021 04:50:52 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-4.ams2.redhat.com [10.36.112.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DDC261002F12; Fri, 27 Aug 2021 04:50:51 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id A50FC11380D0; Fri, 27 Aug 2021 06:50:44 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 12/15] vhost: Clean up how VhostOpts method vhost_get_config() fails Date: Fri, 27 Aug 2021 06:50:41 +0200 Message-Id: <20210827045044.388748-13-armbru@redhat.com> In-Reply-To: <20210827045044.388748-1-armbru@redhat.com> References: <20210827045044.388748-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.742, 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_H2=-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 , peter.maydell@linaro.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , "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 Message-Id: <20210720125408.387910-13-armbru@redhat.com> Acked-by: Michael S. Tsirkin Reviewed-by: Philippe Mathieu-Daudé [Sign of error_setg_errno()'s second argument fixed in both calls] --- 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 aec6cc1990..229c114a19 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