From nobody Mon Feb 9 01:22:02 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=pass(p=none dis=none) header.from=redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1534176117311952.0382354544793; Mon, 13 Aug 2018 09:01:57 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 125ED5D5E8; Mon, 13 Aug 2018 16:01:55 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C310F5D750; Mon, 13 Aug 2018 16:01:54 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 603AF245FE; Mon, 13 Aug 2018 16:01:54 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id w7DG103v001468 for ; Mon, 13 Aug 2018 12:01:00 -0400 Received: by smtp.corp.redhat.com (Postfix) id 6B5342166BA5; Mon, 13 Aug 2018 16:01:00 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 093C62166BA0 for ; Mon, 13 Aug 2018 16:00:59 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Mon, 13 Aug 2018 18:00:03 +0200 Message-Id: <8ca33a7e8c8cddfd42ece6e3a6ce2b033001376a.1534173735.git.pkrempa@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCHv2 29/62] qemu: alias: Generate QDEV name of the block backend for disks X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Mon, 13 Aug 2018 16:01:56 +0000 (UTC) X-ZohoMail: RDMRC_0 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" When we stop using -drive qemu stops reporting it in some of the monitor commands. To allow referring the disk frontends and the corresponding block backends we need to know these names. Unfortunately different buses require different names. Signed-off-by: Peter Krempa --- src/qemu/qemu_alias.c | 86 +++++++++++++++++++++++++++++++++++----------= ---- src/qemu/qemu_alias.h | 3 +- src/qemu/qemu_hotplug.c | 2 +- 3 files changed, 65 insertions(+), 26 deletions(-) diff --git a/src/qemu/qemu_alias.c b/src/qemu/qemu_alias.c index 80d9b6cf46..e66a8a5c1d 100644 --- a/src/qemu/qemu_alias.c +++ b/src/qemu/qemu_alias.c @@ -175,44 +175,82 @@ qemuAssignDeviceControllerAlias(virDomainDefPtr domai= nDef, } -/* Our custom -drive naming scheme used with id=3D */ int qemuAssignDeviceDiskAlias(virDomainDefPtr def, - virDomainDiskDefPtr disk) + virDomainDiskDefPtr disk, + virQEMUCapsPtr qemuCaps) { + qemuDomainDiskPrivatePtr diskPriv =3D QEMU_DOMAIN_DISK_PRIVATE(disk); const char *prefix =3D virDomainDiskBusTypeToString(disk->bus); int controllerModel =3D -1; if (disk->info.alias) return 0; - if (disk->info.type =3D=3D VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE) { - if (disk->bus =3D=3D VIR_DOMAIN_DISK_BUS_SCSI) { - controllerModel =3D qemuDomainFindSCSIControllerModel(def, - &disk->inf= o); - if (controllerModel < 0) + if (!disk->info.alias) { + if (disk->info.type =3D=3D VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DRIVE) { + if (disk->bus =3D=3D VIR_DOMAIN_DISK_BUS_SCSI) { + controllerModel =3D qemuDomainFindSCSIControllerModel(def, + &disk-= >info); + if (controllerModel < 0) + return -1; + } + + if (disk->bus !=3D VIR_DOMAIN_DISK_BUS_SCSI || + controllerModel =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LS= ILOGIC) { + if (virAsprintf(&disk->info.alias, "%s%d-%d-%d", prefix, + disk->info.addr.drive.controller, + disk->info.addr.drive.bus, + disk->info.addr.drive.unit) < 0) + return -1; + } else { + if (virAsprintf(&disk->info.alias, "%s%d-%d-%d-%d", prefix, + disk->info.addr.drive.controller, + disk->info.addr.drive.bus, + disk->info.addr.drive.target, + disk->info.addr.drive.unit) < 0) + return -1; + } + } else { + int idx =3D virDiskNameToIndex(disk->dst); + if (virAsprintf(&disk->info.alias, "%s-disk%d", prefix, idx) <= 0) return -1; } + } - if (disk->bus !=3D VIR_DOMAIN_DISK_BUS_SCSI || - controllerModel =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_SCSI_LSILOG= IC) { - if (virAsprintf(&disk->info.alias, "%s%d-%d-%d", prefix, - disk->info.addr.drive.controller, - disk->info.addr.drive.bus, - disk->info.addr.drive.unit) < 0) + /* For -blockdev we need to know the QDEV ids of the block backend of = the + * disk. The QDEV id used by qemu is based on the alias so we generate= them + * here. */ + if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV)) { + switch ((virDomainDiskBus) disk->bus) { + case VIR_DOMAIN_DISK_BUS_FDC: + case VIR_DOMAIN_DISK_BUS_IDE: + case VIR_DOMAIN_DISK_BUS_SATA: + case VIR_DOMAIN_DISK_BUS_SCSI: + if (VIR_STRDUP(diskPriv->backendQomName, disk->info.alias) < 0) return -1; - } else { - if (virAsprintf(&disk->info.alias, "%s%d-%d-%d-%d", prefix, - disk->info.addr.drive.controller, - disk->info.addr.drive.bus, - disk->info.addr.drive.target, - disk->info.addr.drive.unit) < 0) + break; + + case VIR_DOMAIN_DISK_BUS_VIRTIO: + if (virAsprintf(&diskPriv->backendQomName, + "/machine/peripheral/%s/virtio-backend", + disk->info.alias) < 0) return -1; + break; + + case VIR_DOMAIN_DISK_BUS_USB: + if (virAsprintf(&diskPriv->backendQomName, + "/machine/peripheral/%s/%s.0/legacy[0]", + disk->info.alias, disk->info.alias) < 0) + return -1; + break; + + case VIR_DOMAIN_DISK_BUS_XEN: + case VIR_DOMAIN_DISK_BUS_UML: + case VIR_DOMAIN_DISK_BUS_SD: + case VIR_DOMAIN_DISK_BUS_LAST: + break; } - } else { - int idx =3D virDiskNameToIndex(disk->dst); - if (virAsprintf(&disk->info.alias, "%s-disk%d", prefix, idx) < 0) - return -1; } return 0; @@ -551,7 +589,7 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCap= sPtr qemuCaps) size_t i; for (i =3D 0; i < def->ndisks; i++) { - if (qemuAssignDeviceDiskAlias(def, def->disks[i]) < 0) + if (qemuAssignDeviceDiskAlias(def, def->disks[i], qemuCaps) < 0) return -1; } for (i =3D 0; i < def->nnets; i++) { diff --git a/src/qemu/qemu_alias.h b/src/qemu/qemu_alias.h index 7bfebff968..33b9937ea4 100644 --- a/src/qemu/qemu_alias.h +++ b/src/qemu/qemu_alias.h @@ -39,7 +39,8 @@ int qemuAssignDeviceControllerAlias(virDomainDefPtr domai= nDef, virDomainControllerDefPtr controller); int qemuAssignDeviceDiskAlias(virDomainDefPtr def, - virDomainDiskDefPtr disk); + virDomainDiskDefPtr disk, + virQEMUCapsPtr qemuCaps); int qemuAssignDeviceHostdevAlias(virDomainDefPtr def, char **alias, diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 53ee01bc54..32d0c3862e 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -645,7 +645,7 @@ qemuDomainAttachDiskGeneric(virQEMUDriverPtr driver, if (qemuHotplugPrepareDiskAccess(driver, vm, disk, NULL, false) < 0) goto cleanup; - if (qemuAssignDeviceDiskAlias(vm->def, disk) < 0) + if (qemuAssignDeviceDiskAlias(vm->def, disk, priv->qemuCaps) < 0) goto error; if (!(diskdata =3D qemuHotplugDiskSourceAttachPrepare(disk, priv->qemu= Caps))) --=20 2.16.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list