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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16D81C433EF for ; Wed, 10 Nov 2021 05:48:21 +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 9B99F61053 for ; Wed, 10 Nov 2021 05:48:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9B99F61053 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]:37458 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mkgT5-0006Py-Lv for qemu-devel@archiver.kernel.org; Wed, 10 Nov 2021 00:48:19 -0500 Received: from eggs.gnu.org ([209.51.188.92]:48940) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkgQh-0004c1-Sd for qemu-devel@nongnu.org; Wed, 10 Nov 2021 00:45:52 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:33877) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mkgQf-0007jo-Ky for qemu-devel@nongnu.org; Wed, 10 Nov 2021 00:45:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1636523148; 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=zC+D8hvg27hFwJP/rUi5AHOq0p4RdraLwZ8q1YH7nIU=; b=c0YGOT7AmfICbLocmxSLFFNrxgfKv6rUbHSWAc55ttQ0PX7Q60r41as5I7k+wWL3TMrf7z PgDgC31rfiEBhiwK2nqVFwPB+sc+F+aa4mEkMzz0c97Ltki0f2wOkXjVYcjVkpjg1ueno1 3SKJf2sa+0iptRLcYT+jR1zJqNWMzbQ= 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-43-jtXEMdk6OMCM_3LYn_ZW5w-1; Wed, 10 Nov 2021 00:45:44 -0500 X-MC-Unique: jtXEMdk6OMCM_3LYn_ZW5w-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 C1F03874994; Wed, 10 Nov 2021 05:45:43 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-7.ams2.redhat.com [10.36.112.7]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7341860C17; Wed, 10 Nov 2021 05:45:43 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id F3D1F11380AA; Wed, 10 Nov 2021 06:45:41 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 1/1] monitor: Fix find_device_state() for IDs containing slashes Date: Wed, 10 Nov 2021 06:45:41 +0100 Message-Id: <20211110054541.2368410-2-armbru@redhat.com> In-Reply-To: <20211110054541.2368410-1-armbru@redhat.com> References: <20211110054541.2368410-1-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=170.10.129.124; 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=-0.699, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christian Borntraeger , richard.henderson@linaro.org, Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Recent commit 6952026120 "monitor: Tidy up find_device_state()" assumed the function's argument is "the device's ID or QOM path" (as documented for device_del). It's actually either an absolute QOM path, or a QOM path relative to /machine/peripheral/. Such a relative path is a device ID when it doesn't contain a slash. When it does, the function now always fails. Broke iotest 200, which uses relative path "vda/virtio-backend". It fails because object_resolve_path_component() resolves just one component, not a relative path. The obvious function to resolve relative paths is object_resolve_path(). It picks a parent automatically. Too much magic, we want to specify the parent. Create new object_resolve_path_at() for that, and use it in find_device_state(). Reported-by: Christian Borntraeger Signed-off-by: Markus Armbruster Message-Id: <20211019085711.86377-1-armbru@redhat.com> Tested-by: Christian Borntraeger Acked-by: Paolo Bonzini --- include/qom/object.h | 12 ++++++++++++ qom/object.c | 11 +++++++++++ softmmu/qdev-monitor.c | 8 +------- 3 files changed, 24 insertions(+), 7 deletions(-) diff --git a/include/qom/object.h b/include/qom/object.h index faae0d841f..fae096f51c 100644 --- a/include/qom/object.h +++ b/include/qom/object.h @@ -1543,6 +1543,18 @@ Object *object_resolve_path(const char *path, bool *ambiguous); Object *object_resolve_path_type(const char *path, const char *typename, bool *ambiguous); +/** + * object_resolve_path_at: + * @parent: the object in which to resolve the path + * @path: the path to resolve + * + * This is like object_resolve_path(), except paths not starting with + * a slash are relative to @parent. + * + * Returns: The resolved object or NULL on path lookup failure. + */ +Object *object_resolve_path_at(Object *parent, const char *path); + /** * object_resolve_path_component: * @parent: the object in which to resolve the path diff --git a/qom/object.c b/qom/object.c index 6be710bc40..4f0677cca9 100644 --- a/qom/object.c +++ b/qom/object.c @@ -2144,6 +2144,17 @@ Object *object_resolve_path(const char *path, bool *ambiguous) return object_resolve_path_type(path, TYPE_OBJECT, ambiguous); } +Object *object_resolve_path_at(Object *parent, const char *path) +{ + g_auto(GStrv) parts = g_strsplit(path, "/", 0); + + if (*path == '/') { + return object_resolve_abs_path(object_get_root(), parts + 1, + TYPE_OBJECT); + } + return object_resolve_abs_path(parent, parts, TYPE_OBJECT); +} + typedef struct StringProperty { char *(*get)(Object *, Error **); diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c index f8b3a4cd82..b5aaae4b8c 100644 --- a/softmmu/qdev-monitor.c +++ b/softmmu/qdev-monitor.c @@ -871,15 +871,9 @@ void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp) static DeviceState *find_device_state(const char *id, Error **errp) { - Object *obj; + Object *obj = object_resolve_path_at(qdev_get_peripheral(), id); DeviceState *dev; - if (id[0] == '/') { - obj = object_resolve_path(id, NULL); - } else { - obj = object_resolve_path_component(qdev_get_peripheral(), id); - } - if (!obj) { error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, "Device '%s' not found", id); -- 2.31.1