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 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 3831FC5AE5A for ; Wed, 28 Aug 2024 14:20:39 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sjJWa-000764-An; Wed, 28 Aug 2024 10:19:52 -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 1sjJWX-00075P-Ou for qemu-devel@nongnu.org; Wed, 28 Aug 2024 10:19:50 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sjJWV-0006Rb-0b for qemu-devel@nongnu.org; Wed, 28 Aug 2024 10:19:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724854784; h=from:from:reply-to: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=JNRHomEDXx9z9409hVeFmHx8gqVMt3a2fK9g6Y3TbVU=; b=gApfeFPBWsQyNv5LVAnbbGRlJTDexgCPIqROhGYaR9TxiRy2zP1FwyUflQQzWekpUxru5a Ag6ra8fThhyx/2xp2pU6RMjBr21+5Jx4NWkWjJBeLwH+pYrmHo4GAacyYQcJBqFP+I3oX7 Ot059M87XqSQdOKqTra5z/rsZ2mMoWU= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-70-_weIMNJlMqegwZH_472fQw-1; Wed, 28 Aug 2024 10:19:41 -0400 X-MC-Unique: _weIMNJlMqegwZH_472fQw-1 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 917081955D4E; Wed, 28 Aug 2024 14:19:39 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.92]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3C4881956052; Wed, 28 Aug 2024 14:19:36 +0000 (UTC) Date: Wed, 28 Aug 2024 15:19:33 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Stefan Hajnoczi Cc: qemu-devel@nongnu.org, Eduardo Habkost , pkrempa@redhat.com, Paolo Bonzini , armbru@redhat.com Subject: Re: [PATCH v3 1/2] qdev-monitor: avoid QemuOpts in QMP device_add Message-ID: References: <20240827192751.948633-1-stefanha@redhat.com> <20240827192751.948633-2-stefanha@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240827192751.948633-2-stefanha@redhat.com> User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Tue, Aug 27, 2024 at 03:27:50PM -0400, Stefan Hajnoczi wrote: > The QMP device_add monitor command converts the QDict arguments to > QemuOpts and then back again to QDict. This process only supports scalar > types. Device properties like virtio-blk-pci's iothread-vq-mapping (an > array of objects) are silently dropped by qemu_opts_from_qdict() during > the QemuOpts conversion even though QAPI is capable of validating them. > As a result, hotplugging virtio-blk-pci devices with the > iothread-vq-mapping property does not work as expected (the property is > ignored). > > Get rid of the QemuOpts conversion in qmp_device_add() and call > qdev_device_add_from_qdict() with from_json=true. Using the QMP > command's QDict arguments directly allows non-scalar properties. > > The HMP is also adjusted since qmp_device_add()'s now expects properly > typed JSON arguments and cannot be used from HMP anymore. Move the code > that was previously in qmp_device_add() (with QemuOpts conversion and > from_json=false) into hmp_device_add() so that its behavior is > unchanged. > > This patch changes the behavior of QMP device_add but not HMP > device_add. QMP clients that sent incorrectly typed device_add QMP > commands no longer work. This is a breaking change but clients should be > using the correct types already. See the netdev_add QAPIfication in > commit db2a380c8457 for similar reasoning and object-add in commit > 9151e59a8b6e. Unlike those commits, we continue to rely on 'gen': false > for the time being. > > Markus helped me figure this out and even provided a draft patch. The > code ended up very close to what he suggested. > > Suggested-by: Markus Armbruster > Cc: Daniel P. Berrangé > Signed-off-by: Stefan Hajnoczi > --- > system/qdev-monitor.c | 44 ++++++++++++++++++++++++++++--------------- > 1 file changed, 29 insertions(+), 15 deletions(-) Reviewed-by: Daniel P. Berrangé With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|