From patchwork Mon Jun 17 06:33:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 13700191 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 CECE5C27C7B for ; Mon, 17 Jun 2024 06:35:58 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sJ5ws-0002bi-T5; Mon, 17 Jun 2024 02:34:38 -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 1sJ5wp-0002T4-Tl for qemu-devel@nongnu.org; Mon, 17 Jun 2024 02:34:35 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sJ5wn-0004Jd-T5 for qemu-devel@nongnu.org; Mon, 17 Jun 2024 02:34:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718606073; 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=Vok6+6cbG4CxFr0Iyrkv3BB2FhrRVuirn5S18kj9l1E=; b=Sl9jw+YmPHfARe9/Gn6k11JGB8ADixmTECbN5fV8GSOuToTYvB154y10EZ6VN6iS+xYfiE 4frgRVLHKYytTH+9lalZRCHsnyFl5dm4ZjuNZZdHUlzms11J3RLebWp+eHBpn7kBDvArZh 1PQ2Jeb5oYBhGTJqgxv5wHvYtoBYzYs= 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-33-_FfhDfAXNfCn2uPJV9xWjg-1; Mon, 17 Jun 2024 02:34:18 -0400 X-MC-Unique: _FfhDfAXNfCn2uPJV9xWjg-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 A5DB419560A0; Mon, 17 Jun 2024 06:34:17 +0000 (UTC) Received: from corto.redhat.com (unknown [10.39.192.49]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id DB1183000218; Mon, 17 Jun 2024 06:34:15 +0000 (UTC) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-devel@nongnu.org Cc: Eric Auger , Zhenzhong Duan , Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_Goat?= =?utf-8?q?er?= Subject: [PATCH v2 01/17] vfio: Make vfio_devices_dma_logging_start() return bool Date: Mon, 17 Jun 2024 08:33:53 +0200 Message-ID: <20240617063409.34393-2-clg@redhat.com> In-Reply-To: <20240617063409.34393-1-clg@redhat.com> References: <20240617063409.34393-1-clg@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 11 X-Spam_score: 1.1 X-Spam_bar: + X-Spam_report: (1.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.148, 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=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RCVD_IN_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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 Since vfio_devices_dma_logging_start() takes an 'Error **' argument, best practices suggest to return a bool. See the api/error.h Rules section. It will simplify potential changes coming after. vfio_container_set_dirty_page_tracking() could be modified in the same way but the errno value can be saved in the migration stream when called from vfio_listener_log_global_stop(). Signed-off-by: Cédric Le Goater Reviewed-by: Zhenzhong Duan Reviewed-by: Eric Auger --- hw/vfio/common.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 9e4c0cc95ff90209d3e8184035af0806a2bf890b..d48cd9b9361a92d184e423ffc60aabaff40fb487 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1020,7 +1020,7 @@ static void vfio_device_feature_dma_logging_start_destroy( g_free(feature); } -static int vfio_devices_dma_logging_start(VFIOContainerBase *bcontainer, +static bool vfio_devices_dma_logging_start(VFIOContainerBase *bcontainer, Error **errp) { struct vfio_device_feature *feature; @@ -1033,7 +1033,7 @@ static int vfio_devices_dma_logging_start(VFIOContainerBase *bcontainer, &ranges); if (!feature) { error_setg_errno(errp, errno, "Failed to prepare DMA logging"); - return -errno; + return false; } QLIST_FOREACH(vbasedev, &bcontainer->device_list, container_next) { @@ -1058,7 +1058,7 @@ out: vfio_device_feature_dma_logging_start_destroy(feature); - return ret; + return ret == 0; } static bool vfio_listener_log_global_start(MemoryListener *listener, @@ -1067,18 +1067,18 @@ static bool vfio_listener_log_global_start(MemoryListener *listener, ERRP_GUARD(); VFIOContainerBase *bcontainer = container_of(listener, VFIOContainerBase, listener); - int ret; + bool ret; if (vfio_devices_all_device_dirty_tracking(bcontainer)) { ret = vfio_devices_dma_logging_start(bcontainer, errp); } else { - ret = vfio_container_set_dirty_page_tracking(bcontainer, true, errp); + ret = vfio_container_set_dirty_page_tracking(bcontainer, true, errp) == 0; } - if (ret) { + if (!ret) { error_prepend(errp, "vfio: Could not start dirty page tracking - "); } - return !ret; + return ret; } static void vfio_listener_log_global_stop(MemoryListener *listener)