From nobody Tue Feb 10 11:55:49 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1573225801; cv=none; d=zoho.com; s=zohoarc; b=EmWsp5mRQo68dmIjEnZDcMEk5eXCl1eqIQiGn1iT4ZTztm0NTS0f+3qSIxu9A5gq72eYfpdaS3yoW3uhGu37GFVGrXEKoAUhJ7EgRPMNrCn8qZVlcDEXjaf26fz+1zH/pWLhdvK+NjlC47DPEnMj5sMxE04LiGgLIDwsfyvVSgY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1573225801; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=qchnptFi058dP+AH94G/eZXd37hN440uraGqVjM2KYE=; b=ddofYtfbR9YegkYQp+3xP6O1CRq9vQPZV4l0hMj8q/35f2U9nn7X7hqr1xawraqKW/8INlIrfHxHgu7rUdP16Va6IOb/h65byMG1VovMgcWNbnA5tpH9Owvc3xGeDzUHxIEcaCjLvaPdEDrPYr9o6oqR+R9AlNuGYHUsTLUe45U= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1573225801309422.9584168286465; Fri, 8 Nov 2019 07:10:01 -0800 (PST) Received: from localhost ([::1]:55946 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iT5tg-00036a-3t for importer@patchew.org; Fri, 08 Nov 2019 10:10:00 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46493) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iT5oH-0004th-3a for qemu-devel@nongnu.org; Fri, 08 Nov 2019 10:04:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iT5oF-0004u4-BM for qemu-devel@nongnu.org; Fri, 08 Nov 2019 10:04:24 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:37175 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iT5oE-0004tF-1u for qemu-devel@nongnu.org; Fri, 08 Nov 2019 10:04:22 -0500 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-324-depKDAkFO_CFx_4sucFtuw-1; Fri, 08 Nov 2019 10:04:20 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 14252107ACC4 for ; Fri, 8 Nov 2019 15:04:19 +0000 (UTC) Received: from localhost (ovpn-112-25.ams2.redhat.com [10.36.112.25]) by smtp.corp.redhat.com (Postfix) with ESMTP id 388795C1BB; Fri, 8 Nov 2019 15:04:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573225461; 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=qchnptFi058dP+AH94G/eZXd37hN440uraGqVjM2KYE=; b=PRbYFbMHAtVJyMQ0YpVOFq2H7oDjaESiaOex8SErkFVVIuP+zGSKVX8Y4P64X/UzEgAlVg U3BEvDWkLxmQnqUVzHQ6FbSivLQKcs/MGNww85YZaTPSRBQq2xyBDprTh4cQHR38IPeL/F 8P9p47uLisYD2Xed0VxL910xaAH9ch8= From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: qemu-devel@nongnu.org Subject: [PATCH v6 12/25] qmp: introduce asynchronous command type Date: Fri, 8 Nov 2019 19:01:10 +0400 Message-Id: <20191108150123.12213-13-marcandre.lureau@redhat.com> In-Reply-To: <20191108150123.12213-1-marcandre.lureau@redhat.com> References: <20191108150123.12213-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: depKDAkFO_CFx_4sucFtuw-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , armbru@redhat.com, kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Add a new type of command, QmpCommandFuncAsync: those commands can return later thanks to QmpReturn. This commit introduces the new type and register function and teach qmp_dipatch() to call it without qmp_return(). The async_fn callback will be responsible for calling qmp_return(), either synchronously or asynchronously. Signed-off-by: Marc-Andr=C3=A9 Lureau --- include/qapi/qmp/dispatch.h | 10 +++++++++- qapi/qmp-dispatch.c | 27 ++++++++++++++++----------- qapi/qmp-registry.c | 27 ++++++++++++++++++++++++--- 3 files changed, 49 insertions(+), 15 deletions(-) diff --git a/include/qapi/qmp/dispatch.h b/include/qapi/qmp/dispatch.h index 92d6fd1afb..6aef0abc70 100644 --- a/include/qapi/qmp/dispatch.h +++ b/include/qapi/qmp/dispatch.h @@ -21,6 +21,7 @@ typedef struct QmpReturn QmpReturn; =20 typedef void (QmpCommandFunc)(QDict *, QObject **, Error **); +typedef void (QmpCommandAsyncFunc)(QDict *, QmpReturn *); =20 typedef enum QmpCommandOptions { @@ -28,12 +29,16 @@ typedef enum QmpCommandOptions QCO_NO_SUCCESS_RESP =3D (1U << 0), QCO_ALLOW_OOB =3D (1U << 1), QCO_ALLOW_PRECONFIG =3D (1U << 2), + QCO_ASYNC =3D (1U << 3), } QmpCommandOptions; =20 typedef struct QmpCommand { const char *name; - QmpCommandFunc *fn; + union { + QmpCommandFunc *fn; + QmpCommandAsyncFunc *async_fn; + }; QmpCommandOptions options; QTAILQ_ENTRY(QmpCommand) node; bool enabled; @@ -88,6 +93,9 @@ void qmp_return_error(QmpReturn *qret, Error *err); =20 void qmp_register_command(QmpCommandList *cmds, const char *name, QmpCommandFunc *fn, QmpCommandOptions options); +void qmp_register_async_command(QmpCommandList *cmds, const char *name, + QmpCommandAsyncFunc *fn, + QmpCommandOptions options); const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char *name); void qmp_session_init(QmpSession *session, diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c index 3eb7e4b610..85e99671a9 100644 --- a/qapi/qmp-dispatch.c +++ b/qapi/qmp-dispatch.c @@ -171,7 +171,7 @@ static QDict *qmp_dispatch_check_obj(const QObject *req= uest, bool allow_oob, return dict; } =20 -static QObject *do_qmp_dispatch(const QmpCommandList *cmds, QObject *reque= st, +static QObject *do_qmp_dispatch(QmpSession *session, QObject *request, bool allow_oob, Error **errp) { Error *local_err =3D NULL; @@ -193,7 +193,7 @@ static QObject *do_qmp_dispatch(const QmpCommandList *c= mds, QObject *request, command =3D qdict_get_str(dict, "exec-oob"); oob =3D true; } - cmd =3D qmp_find_command(cmds, command); + cmd =3D qmp_find_command(session->cmds, command); if (cmd =3D=3D NULL) { error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND, "The command %s has not been found", command); @@ -225,14 +225,19 @@ static QObject *do_qmp_dispatch(const QmpCommandList = *cmds, QObject *request, qobject_ref(args); } =20 - cmd->fn(args, &ret, &local_err); - if (local_err) { - error_propagate(errp, local_err); - } else if (cmd->options & QCO_NO_SUCCESS_RESP) { - g_assert(!ret); - } else if (!ret) { - /* TODO turn into assertion */ - ret =3D QOBJECT(qdict_new()); + + if (cmd->options & QCO_ASYNC) { + cmd->async_fn(args, qmp_return_new(session, request)); + } else { + cmd->fn(args, &ret, &local_err); + if (local_err) { + error_propagate(errp, local_err); + } else if (cmd->options & QCO_NO_SUCCESS_RESP) { + g_assert(!ret); + } else if (!ret) { + /* TODO turn into assertion */ + ret =3D QOBJECT(qdict_new()); + } } =20 qobject_unref(args); @@ -305,7 +310,7 @@ void qmp_dispatch(QmpSession *session, QObject *request= , bool allow_oob) Error *err =3D NULL; QObject *ret; =20 - ret =3D do_qmp_dispatch(session->cmds, request, allow_oob, &err); + ret =3D do_qmp_dispatch(session, request, allow_oob, &err); if (err) { qmp_return_error(qmp_return_new(session, request), err); } else if (ret) { diff --git a/qapi/qmp-registry.c b/qapi/qmp-registry.c index d0f9a1d3e3..0f3d521ce5 100644 --- a/qapi/qmp-registry.c +++ b/qapi/qmp-registry.c @@ -15,16 +15,37 @@ #include "qemu/osdep.h" #include "qapi/qmp/dispatch.h" =20 -void qmp_register_command(QmpCommandList *cmds, const char *name, - QmpCommandFunc *fn, QmpCommandOptions options) + +static QmpCommand *qmp_command_new(QmpCommandList *cmds, const char *name, + QmpCommandOptions options) { QmpCommand *cmd =3D g_malloc0(sizeof(*cmd)); =20 cmd->name =3D name; - cmd->fn =3D fn; cmd->enabled =3D true; cmd->options =3D options; QTAILQ_INSERT_TAIL(cmds, cmd, node); + + return cmd; +} + + +void qmp_register_command(QmpCommandList *cmds, const char *name, + QmpCommandFunc *fn, QmpCommandOptions options) +{ + QmpCommand *cmd =3D qmp_command_new(cmds, name, options); + + assert(!(options & QCO_ASYNC)); + cmd->fn =3D fn; +} + +void qmp_register_async_command(QmpCommandList *cmds, const char *name, + QmpCommandAsyncFunc *fn, QmpCommandOptions opt= ions) +{ + QmpCommand *cmd =3D qmp_command_new(cmds, name, options); + + assert(options & QCO_ASYNC); + cmd->async_fn =3D fn; } =20 const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char = *name) --=20 2.24.0