From patchwork Mon May 2 12:33:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Mammedov X-Patchwork-Id: 8992061 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 96D859F1C1 for ; Mon, 2 May 2016 12:43:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EF9B9201FE for ; Mon, 2 May 2016 12:43:35 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2FFFF201FA for ; Mon, 2 May 2016 12:43:35 +0000 (UTC) Received: from localhost ([::1]:36422 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axDCF-0003py-DL for patchwork-qemu-devel@patchwork.kernel.org; Mon, 02 May 2016 08:43:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35722) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axD49-00079k-D0 for qemu-devel@nongnu.org; Mon, 02 May 2016 08:35:15 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1axD3x-000091-J4 for qemu-devel@nongnu.org; Mon, 02 May 2016 08:35:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60253) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1axD3x-0008WT-BU for qemu-devel@nongnu.org; Mon, 02 May 2016 08:34:57 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 425FF8111B for ; Mon, 2 May 2016 12:34:46 +0000 (UTC) Received: from dell-r430-03.lab.eng.brq.redhat.com (dell-r430-03.lab.eng.brq.redhat.com [10.34.112.60]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u42CXqcH000450; Mon, 2 May 2016 08:34:44 -0400 From: Igor Mammedov To: qemu-devel@nongnu.org Date: Mon, 2 May 2016 14:33:39 +0200 Message-Id: <1462192431-146342-31-git-send-email-imammedo@redhat.com> In-Reply-To: <1462192431-146342-1-git-send-email-imammedo@redhat.com> References: <1462192431-146342-1-git-send-email-imammedo@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC 30/42] qdev: hotplug: Introduce HotplugHandler.pre_plug() callback 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: drjones@redhat.com, ehabkost@redhat.com, mst@redhat.com, armbru@redhat.com, marcel@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP pre_plug callback is to be called before device.realize() is executed. This would allow to check/set device's properties from HotplugHandler. Signed-off-by: Igor Mammedov Signed-off-by: Bharata B Rao --- hw/core/hotplug.c | 11 +++++++++++ hw/core/qdev.c | 9 ++++++++- include/hw/hotplug.h | 14 +++++++++++++- 3 files changed, 32 insertions(+), 2 deletions(-) diff --git a/hw/core/hotplug.c b/hw/core/hotplug.c index 645cfca..17ac986 100644 --- a/hw/core/hotplug.c +++ b/hw/core/hotplug.c @@ -13,6 +13,17 @@ #include "hw/hotplug.h" #include "qemu/module.h" +void hotplug_handler_pre_plug(HotplugHandler *plug_handler, + DeviceState *plugged_dev, + Error **errp) +{ + HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler); + + if (hdc->pre_plug) { + hdc->pre_plug(plug_handler, plugged_dev, errp); + } +} + void hotplug_handler_plug(HotplugHandler *plug_handler, DeviceState *plugged_dev, Error **errp) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index db41aa1..a0b3aad 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -1062,6 +1062,14 @@ static void device_set_realized(Object *obj, bool value, Error **errp) g_free(name); } + hotplug_ctrl = qdev_get_hotplug_handler(dev); + if (hotplug_ctrl) { + hotplug_handler_pre_plug(hotplug_ctrl, dev, &local_err); + if (local_err != NULL) { + goto fail; + } + } + if (dc->realize) { dc->realize(dev, &local_err); } @@ -1072,7 +1080,6 @@ static void device_set_realized(Object *obj, bool value, Error **errp) DEVICE_LISTENER_CALL(realize, Forward, dev); - hotplug_ctrl = qdev_get_hotplug_handler(dev); if (hotplug_ctrl) { hotplug_handler_plug(hotplug_ctrl, dev, &local_err); } diff --git a/include/hw/hotplug.h b/include/hw/hotplug.h index da1d0e4..c0db869 100644 --- a/include/hw/hotplug.h +++ b/include/hw/hotplug.h @@ -45,7 +45,8 @@ typedef void (*hotplug_fn)(HotplugHandler *plug_handler, * hardware (un)plug functions. * * @parent: Opaque parent interface. - * @plug: plug callback. + * @pre_plug: pre plug callback called at start of device.realize(true) + * @plug: plug callback called at end of device.realize(true). * @unplug_request: unplug request callback. * Used as a means to initiate device unplug for devices that * require asynchronous unplug handling. @@ -58,6 +59,7 @@ typedef struct HotplugHandlerClass { InterfaceClass parent; /* */ + hotplug_fn pre_plug; hotplug_fn plug; hotplug_fn unplug_request; hotplug_fn unplug; @@ -73,6 +75,16 @@ void hotplug_handler_plug(HotplugHandler *plug_handler, Error **errp); /** + * hotplug_handler_pre_plug: + * + * Call #HotplugHandlerClass.pre_plug callback of @plug_handler. + */ +void hotplug_handler_pre_plug(HotplugHandler *plug_handler, + DeviceState *plugged_dev, + Error **errp); + + +/** * hotplug_handler_unplug_request: * * Calls #HotplugHandlerClass.unplug_request callback of @plug_handler.