From patchwork Tue Sep 26 22:41:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jonah Palmer X-Patchwork-Id: 13399708 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 7CF8CE7F143 for ; Tue, 26 Sep 2023 22:42:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qlGk9-0005xQ-0N; Tue, 26 Sep 2023 18:41:25 -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 1qlGk8-0005xB-5J for qemu-devel@nongnu.org; Tue, 26 Sep 2023 18:41:24 -0400 Received: from mx0a-00069f02.pphosted.com ([205.220.165.32]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qlGk6-0005Tw-5i for qemu-devel@nongnu.org; Tue, 26 Sep 2023 18:41:23 -0400 Received: from pps.filterd (m0246617.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38QLTIi7011161; Tue, 26 Sep 2023 22:41:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2023-03-30; bh=w5etLEMISJG2qsLVhiZMoZtWwzuiDUc38taoQ2VP56Q=; b=kvd71qoBiTf2qw1+icOSq469R8SGmwEZwvBQJBhklUrcF+6qPJJBQjpnpOqZPq8oVDWX yXRN6sWXXnGh5A8ArAynAVAxeGGSLY0HyxUMHiJCjBhzj5GYqhez7uVa5AwSk5L7kvHO umS2lfYCKsAImkgV/jj6sGnX+Xsey+vIV305cuLneT5sPEGvw0929eEMC08xsIOum7DD 0ozIpFFys3jw/iCaNDAVHh+FRnhNY9ORA6RuoBDvggfaW84Kpp4RoPBfIGJvgGIxGj3G sL7YNYCTx4vNcMPEw+oy9HyPcg0Kja0/IDzIyseUiiJ8PSN/+jPLt06+g/9IeZk9J2ag OA== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3t9rjug2cj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Sep 2023 22:41:15 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 38QKvGu9003238; Tue, 26 Sep 2023 22:41:14 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3t9pf74c8c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 26 Sep 2023 22:41:14 +0000 Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 38QMfBNn022981; Tue, 26 Sep 2023 22:41:14 GMT Received: from jonah-ol8.us.oracle.com (dhcp-10-65-186-167.vpn.oracle.com [10.65.186.167]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3t9pf74c6n-2; Tue, 26 Sep 2023 22:41:13 +0000 From: Jonah Palmer To: qemu-devel@nongnu.org Cc: philmd@linaro.org, laurent@vivier.eu, mst@redhat.com, boris.ostrovsky@oracle.com, alex.bennee@linaro.org, viresh.kumar@linaro.org, armbru@redhat.com, pbonzini@redhat.com, berrange@redhat.com, eduardo@habkost.net, jonah.palmer@oracle.com Subject: [PATCH RESEND v5 1/3] qmp: remove virtio_list, search QOM tree instead Date: Tue, 26 Sep 2023 18:41:05 -0400 Message-Id: <20230926224107.2951144-2-jonah.palmer@oracle.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230926224107.2951144-1-jonah.palmer@oracle.com> References: <20230926224107.2951144-1-jonah.palmer@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-09-26_15,2023-09-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 mlxscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2309260194 X-Proofpoint-ORIG-GUID: pA8a2dpM6e2C6hJH1zzBNef-vd5KUDuc X-Proofpoint-GUID: pA8a2dpM6e2C6hJH1zzBNef-vd5KUDuc Received-SPF: pass client-ip=205.220.165.32; envelope-from=jonah.palmer@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_SBL_A=0.1 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The virtio_list duplicates information about virtio devices that already exist in the QOM composition tree. Instead of creating this list of realized virtio devices, search the QOM composition tree instead. This patch modifies the QMP command qmp_x_query_virtio to instead recursively search the QOM composition tree for devices of type 'TYPE_VIRTIO_DEVICE'. The device is also checked to ensure it's realized. Signed-off-by: Jonah Palmer Reviewed-by: Daniel P. Berrangé --- hw/virtio/virtio-qmp.c | 85 ++++++++++++++---------------------------- hw/virtio/virtio-qmp.h | 7 ---- hw/virtio/virtio.c | 6 --- 3 files changed, 29 insertions(+), 69 deletions(-) diff --git a/hw/virtio/virtio-qmp.c b/hw/virtio/virtio-qmp.c index 7515b0947b..adebf87e9b 100644 --- a/hw/virtio/virtio-qmp.c +++ b/hw/virtio/virtio-qmp.c @@ -667,70 +667,43 @@ VirtioDeviceFeatures *qmp_decode_features(uint16_t device_id, uint64_t bitmap) return features; } +static int query_dev_child(Object *child, void *opaque) +{ + VirtioInfoList **vdevs = opaque; + Object *dev = object_dynamic_cast(child, TYPE_VIRTIO_DEVICE); + if (dev != NULL && DEVICE(dev)->realized) { + VirtIODevice *vdev = VIRTIO_DEVICE(dev); + VirtioInfo *info = g_new(VirtioInfo, 1); + + /* Get canonical path & name of device */ + info->path = object_get_canonical_path(dev); + info->name = g_strdup(vdev->name); + QAPI_LIST_PREPEND(*vdevs, info); + } + return 0; +} + VirtioInfoList *qmp_x_query_virtio(Error **errp) { - VirtioInfoList *list = NULL; - VirtioInfo *node; - VirtIODevice *vdev; + VirtioInfoList *vdevs = NULL; - QTAILQ_FOREACH(vdev, &virtio_list, next) { - DeviceState *dev = DEVICE(vdev); - Error *err = NULL; - QObject *obj = qmp_qom_get(dev->canonical_path, "realized", &err); - - if (err == NULL) { - GString *is_realized = qobject_to_json_pretty(obj, true); - /* virtio device is NOT realized, remove it from list */ - if (!strncmp(is_realized->str, "false", 4)) { - QTAILQ_REMOVE(&virtio_list, vdev, next); - } else { - node = g_new(VirtioInfo, 1); - node->path = g_strdup(dev->canonical_path); - node->name = g_strdup(vdev->name); - QAPI_LIST_PREPEND(list, node); - } - g_string_free(is_realized, true); - } - qobject_unref(obj); + /* Query the QOM composition tree recursively for virtio devices */ + object_child_foreach_recursive(object_get_root(), query_dev_child, &vdevs); + if (vdevs == NULL) { + error_setg(errp, "No virtio devices found"); } - - return list; + return vdevs; } VirtIODevice *qmp_find_virtio_device(const char *path) { - VirtIODevice *vdev; - - QTAILQ_FOREACH(vdev, &virtio_list, next) { - DeviceState *dev = DEVICE(vdev); - - if (strcmp(dev->canonical_path, path) != 0) { - continue; - } - - Error *err = NULL; - QObject *obj = qmp_qom_get(dev->canonical_path, "realized", &err); - if (err == NULL) { - GString *is_realized = qobject_to_json_pretty(obj, true); - /* virtio device is NOT realized, remove it from list */ - if (!strncmp(is_realized->str, "false", 4)) { - g_string_free(is_realized, true); - qobject_unref(obj); - QTAILQ_REMOVE(&virtio_list, vdev, next); - return NULL; - } - g_string_free(is_realized, true); - } else { - /* virtio device doesn't exist in QOM tree */ - QTAILQ_REMOVE(&virtio_list, vdev, next); - qobject_unref(obj); - return NULL; - } - /* device exists in QOM tree & is realized */ - qobject_unref(obj); - return vdev; + /* Verify the canonical path is a realized virtio device */ + Object *dev = object_dynamic_cast(object_resolve_path(path, NULL), + TYPE_VIRTIO_DEVICE); + if (!dev || !DEVICE(dev)->realized) { + return NULL; } - return NULL; + return VIRTIO_DEVICE(dev); } VirtioStatus *qmp_x_query_virtio_status(const char *path, Error **errp) @@ -740,7 +713,7 @@ VirtioStatus *qmp_x_query_virtio_status(const char *path, Error **errp) vdev = qmp_find_virtio_device(path); if (vdev == NULL) { - error_setg(errp, "Path %s is not a VirtIODevice", path); + error_setg(errp, "Path %s is not a realized VirtIODevice", path); return NULL; } diff --git a/hw/virtio/virtio-qmp.h b/hw/virtio/virtio-qmp.h index 8af5f5e65a..245a446a56 100644 --- a/hw/virtio/virtio-qmp.h +++ b/hw/virtio/virtio-qmp.h @@ -15,13 +15,6 @@ #include "hw/virtio/virtio.h" #include "hw/virtio/vhost.h" -#include "qemu/queue.h" - -typedef QTAILQ_HEAD(QmpVirtIODeviceList, VirtIODevice) QmpVirtIODeviceList; - -/* QAPI list of realized VirtIODevices */ -extern QmpVirtIODeviceList virtio_list; - VirtIODevice *qmp_find_virtio_device(const char *path); VirtioDeviceStatus *qmp_decode_status(uint8_t bitmap); VhostDeviceProtocols *qmp_decode_protocols(uint64_t bitmap); diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 4577f3f5b3..6df5d9bec6 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -45,8 +45,6 @@ #include "standard-headers/linux/virtio_mem.h" #include "standard-headers/linux/virtio_vsock.h" -QmpVirtIODeviceList virtio_list; - /* * Maximum size of virtio device config space */ @@ -3651,7 +3649,6 @@ static void virtio_device_realize(DeviceState *dev, Error **errp) vdev->listener.commit = virtio_memory_listener_commit; vdev->listener.name = "virtio"; memory_listener_register(&vdev->listener, vdev->dma_as); - QTAILQ_INSERT_TAIL(&virtio_list, vdev, next); } static void virtio_device_unrealize(DeviceState *dev) @@ -3666,7 +3663,6 @@ static void virtio_device_unrealize(DeviceState *dev) vdc->unrealize(dev); } - QTAILQ_REMOVE(&virtio_list, vdev, next); g_free(vdev->bus_name); vdev->bus_name = NULL; } @@ -3840,8 +3836,6 @@ static void virtio_device_class_init(ObjectClass *klass, void *data) vdc->stop_ioeventfd = virtio_device_stop_ioeventfd_impl; vdc->legacy_features |= VIRTIO_LEGACY_FEATURES; - - QTAILQ_INIT(&virtio_list); } bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev)