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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1719264370; 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=m5kh+vHx1wOYeWPAD0Y2JGsKe21cUeEyyMAi2XwUp9s=; b=RR/n+gAxyPMpsyhj1Uw638x5vsoFGEEi4Sa4WLSOmR9BekmQgQiAaFdYZKgwG1O/vvD29i NwkugJdqI0ZhS0Aez4lBExfu0uoBiMFb2AfaUMb3TwhnUtO9gp8hDwKMgr4NMivsIS33FZ myoZiO4TvG6e+tQvoaIx1ohqpFrOh6A= X-MC-Unique: Q2601HdYOA-XUD6s6hqM8A-1 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Zhenzhong Duan , Eric Auger Subject: [PULL 26/42] vfio: Make vfio_devices_dma_logging_start() return bool Date: Mon, 24 Jun 2024 23:24:40 +0200 Message-ID: <20240624212456.350919-27-clg@redhat.com> In-Reply-To: <20240624212456.350919-1-clg@redhat.com> References: <20240624212456.350919-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.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; 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: 10 X-Spam_score: 1.0 X-Spam_bar: + X-Spam_report: (1.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.207, 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_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1719264466497100003 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(). Reviewed-by: Zhenzhong Duan Reviewed-by: Eric Auger Tested-by: Eric Auger Signed-off-by: C=C3=A9dric Le Goater --- 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..d48cd9b9361a92d184e423ffc60= aabaff40fb487 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1020,7 +1020,7 @@ static void vfio_device_feature_dma_logging_start_des= troy( g_free(feature); } =20 -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(VFIOContain= erBase *bcontainer, &ranges); if (!feature) { error_setg_errno(errp, errno, "Failed to prepare DMA logging"); - return -errno; + return false; } =20 QLIST_FOREACH(vbasedev, &bcontainer->device_list, container_next) { @@ -1058,7 +1058,7 @@ out: =20 vfio_device_feature_dma_logging_start_destroy(feature); =20 - return ret; + return ret =3D=3D 0; } =20 static bool vfio_listener_log_global_start(MemoryListener *listener, @@ -1067,18 +1067,18 @@ static bool vfio_listener_log_global_start(MemoryLi= stener *listener, ERRP_GUARD(); VFIOContainerBase *bcontainer =3D container_of(listener, VFIOContainer= Base, listener); - int ret; + bool ret; =20 if (vfio_devices_all_device_dirty_tracking(bcontainer)) { ret =3D vfio_devices_dma_logging_start(bcontainer, errp); } else { - ret =3D vfio_container_set_dirty_page_tracking(bcontainer, true, e= rrp); + ret =3D vfio_container_set_dirty_page_tracking(bcontainer, true, e= rrp) =3D=3D 0; } =20 - if (ret) { + if (!ret) { error_prepend(errp, "vfio: Could not start dirty page tracking - "= ); } - return !ret; + return ret; } =20 static void vfio_listener_log_global_stop(MemoryListener *listener) --=20 2.45.2