From nobody Wed Feb 11 03:24:39 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1499943892231872.7498856259201; Thu, 13 Jul 2017 04:04:52 -0700 (PDT) Received: from localhost ([::1]:58739 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dVbvL-0007CW-N4 for importer@patchew.org; Thu, 13 Jul 2017 07:04:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40224) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dVbtT-0005iD-27 for qemu-devel@nongnu.org; Thu, 13 Jul 2017 07:02:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dVbtR-0001Jp-QE for qemu-devel@nongnu.org; Thu, 13 Jul 2017 07:02:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49806) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dVbtR-0001IY-Jz for qemu-devel@nongnu.org; Thu, 13 Jul 2017 07:02:49 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 829187F3E0; Thu, 13 Jul 2017 11:02:48 +0000 (UTC) Received: from dhcp-1-107.brq.redhat.com (unknown [10.43.2.68]) by smtp.corp.redhat.com (Postfix) with ESMTP id B0F405D9C0; Thu, 13 Jul 2017 11:02:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 829187F3E0 Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=lprosek@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 829187F3E0 From: Ladi Prosek To: qemu-devel@nongnu.org Date: Thu, 13 Jul 2017 13:02:31 +0200 Message-Id: <20170713110237.6712-3-lprosek@redhat.com> In-Reply-To: <20170713110237.6712-1-lprosek@redhat.com> References: <20170713110237.6712-1-lprosek@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 13 Jul 2017 11:02:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 2/8] virtio: enhance virtio_error messages X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: casasfernando@hotmail.com, mst@redhat.com, jasowang@redhat.com, armbru@redhat.com, groug@kaod.org, arei.gonglei@huawei.com, aneesh.kumar@linux.vnet.ibm.com, stefanha@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Output like "Virtqueue size exceeded" is not much useful in identifying the culprit. This commit adds virtio device name (e.g. "virtio-input") and id if set (e.g. "mouse0") to all virtio error messages to improve debuggabilit= y. Some virtio devices (virtio-scsi, virtio-serial) insert a bus between the proxy object and the virtio backends, so a helper function is added to walk the object hierarchy and find the right proxy object to extract the id from. Signed-off-by: Ladi Prosek --- hw/virtio/virtio.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 0e76a73..a98f681 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -31,6 +31,11 @@ */ #define VIRTIO_PCI_VRING_ALIGN 4096 =20 +/* + * Name of the property linking proxy objects to virtio backend objects. + */ +#define VIRTIO_PROP_BACKEND "virtio-backend" + typedef struct VRingDesc { uint64_t addr; @@ -2223,7 +2228,8 @@ void virtio_instance_init_common(Object *proxy_obj, v= oid *data, DeviceState *vdev =3D data; =20 object_initialize(vdev, vdev_size, vdev_name); - object_property_add_child(proxy_obj, "virtio-backend", OBJECT(vdev), N= ULL); + object_property_add_child(proxy_obj, VIRTIO_PROP_BACKEND, OBJECT(vdev), + NULL); object_unref(OBJECT(vdev)); qdev_alias_all_properties(vdev, proxy_obj); } @@ -2443,12 +2449,29 @@ void virtio_device_set_child_bus_name(VirtIODevice = *vdev, char *bus_name) vdev->bus_name =3D g_strdup(bus_name); } =20 +static const char *virtio_get_device_id(VirtIODevice *vdev) +{ + DeviceState *qdev =3D DEVICE(vdev); + while (qdev) { + /* Find the proxy object corresponding to the vdev backend */ + Object *prop =3D object_property_get_link(OBJECT(qdev), + VIRTIO_PROP_BACKEND, NULL); + if (prop =3D=3D OBJECT(vdev)) { + return qdev->id; + } + qdev =3D qdev->parent_bus->parent; + } + return NULL; +} + void GCC_FMT_ATTR(2, 3) virtio_error(VirtIODevice *vdev, const char *fmt, = ...) { va_list ap; =20 + error_report_nolf("%s (id=3D%s): ", vdev->name, virtio_get_device_id(v= dev)); + va_start(ap, fmt); - error_vreport_nolf(fmt, ap); + error_vprintf(fmt, ap); va_end(ap); error_printf("\n"); =20 --=20 2.9.3