From nobody Sun Apr 28 04:24:02 2024 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 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1511877145076338.85086114259; Tue, 28 Nov 2017 05:52:25 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 768344E334; Tue, 28 Nov 2017 13:52:23 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C4D7E6060D; Tue, 28 Nov 2017 13:52:22 +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 24D511800BDE; Tue, 28 Nov 2017 13:52:21 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id vASDpk6T031097 for ; Tue, 28 Nov 2017 08:51:46 -0500 Received: by smtp.corp.redhat.com (Postfix) id 999F660C9E; Tue, 28 Nov 2017 13:51:46 +0000 (UTC) Received: from icr.brq.redhat.com (unknown [10.43.2.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20BA160FAD for ; Tue, 28 Nov 2017 13:51:42 +0000 (UTC) From: =?UTF-8?q?J=C3=A1n=20Tomko?= To: libvir-list@redhat.com Date: Tue, 28 Nov 2017 14:51:35 +0100 Message-Id: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH] qemu: forbid user aliases for implicit pci-root controllers 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 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 28 Nov 2017 13:52:24 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" For implicit controllers, we do not format user aliases on the command line so we provide a translation between the user alias and the qemu alias. However for pci-root controllers, the logic determining whether to use 'pci' or 'pci.0' depends on: * domain architecture * machine type * QEMU version (for PPC) Since we do not store the QEMU version in status XML and as of commit 5b783379 we no longer have the QEMU_CAPS_PCI_MULTIBUS capability formatted there either, we can only rely on the alias of the controller formatted there. Forbid user aliases for the implicit pci-root controllers so that we retain this information. This allows us to drop the call to virQEMUCapsHasPCIMultiBus, and fixing hotplug after daemon restart, since virQEMUCapsHasPCIMultiBus relies on qemuCaps->arch which is not filled out by reading the status XML either. Partially reverts commit 937f3195 which added the user alias -> qemu alias mapping for implicit PCI controllers. https://bugzilla.redhat.com/show_bug.cgi?id=3D1518148 --- While we cannot reliably map user aliases to qemu aliases in every corner case, I am not sure where to draw the line. For x86_64, HasPCIMultiBus could be fixed by using def->os.arch instead of qemuCaps->arch. So only PPC is unfixable, but this looked like the option with the least amount of exceptions. src/conf/domain_conf.c | 3 +-- src/conf/domain_conf.h | 2 ++ src/qemu/qemu_command.c | 16 +++++-------- src/qemu/qemu_domain.c | 26 ++++++++++++++++++= +++- .../qemuxml2argvdata/qemuxml2argv-user-aliases.xml | 4 +--- 5 files changed, 35 insertions(+), 16 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index 66536653b..d3cd598c8 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -6623,7 +6623,6 @@ virDomainDeviceAddressParseXML(xmlNodePtr address, } =20 =20 -#define USER_ALIAS_PREFIX "ua-" #define USER_ALIAS_CHARS \ "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-" =20 @@ -6680,7 +6679,7 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xml= opt ATTRIBUTE_UNUSED, =20 if (!(flags & VIR_DOMAIN_DEF_PARSE_INACTIVE) || (xmlopt->config.features & VIR_DOMAIN_DEF_FEATURE_USER_ALIAS && - STRPREFIX(aliasStr, USER_ALIAS_PREFIX) && + STRPREFIX(aliasStr, VIR_DOMAIN_USER_ALIAS_PREFIX) && strspn(aliasStr, USER_ALIAS_CHARS) =3D=3D strlen(aliasStr))) VIR_STEAL_PTR(info->alias, aliasStr); } diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index dabbff1c2..de34fb163 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -57,6 +57,8 @@ # include "virtypedparam.h" # include "virsavecookie.h" =20 +# define VIR_DOMAIN_USER_ALIAS_PREFIX "ua-" + /* forward declarations of all device types, required by * virDomainDeviceDef */ diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 0eb591253..89e8b5350 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -321,16 +321,12 @@ qemuBuildDeviceAddressStr(virBufferPtr buf, contIsPHB =3D virDomainControllerIsPSeriesPHB(cont); contTargetIndex =3D cont->opts.pciopts.targetIndex; =20 - /* When domain has builtin pci-root controller we don't pu= t it - * onto cmd line. Therefore we can't set its alias. In that - * case, use the default one. */ - if (!qemuDomainIsPSeries(domainDef) && - cont->model =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROO= T) { - if (virQEMUCapsHasPCIMultiBus(qemuCaps, domainDef)) - contAlias =3D "pci.0"; - else - contAlias =3D "pci"; - } else if (cont->model =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_= PCIE_ROOT) { + /* The builtin pcie-root controller is not put on the comm= and line. + * We cannot set a user alias, but we can reliably predict= the one + * qemu will use. + * For builtin pci-root controllers we cannot do that once= a domain + * is started, but user aliases are forbidden for those. */ + if (cont->model =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_PCIE_RO= OT) { contAlias =3D "pcie.0"; } else { contAlias =3D cont->info.alias; diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 9dab6b24b..ec33f3bad 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3718,6 +3718,27 @@ qemuDomainDeviceDefValidateDisk(const virDomainDiskD= ef *disk) =20 =20 static int +qemuDomainDeviceDefValidateController(const virDomainControllerDef *contro= ller, + const virDomainDef *def) +{ + /* Forbid user aliases for implicit controllers where + * the qemu's device alias depends on the version and therefore + * we cannot figure it out for an already running domain. */ + if (controller->model =3D=3D VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT && + !qemuDomainIsPSeries(def) && + controller->info.alias && + STRPREFIX(controller->info.alias, VIR_DOMAIN_USER_ALIAS_PREFIX)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("user aliases are not available for " + "implicit pci-root controller")); + return -1; + } + + return 0; +} + + +static int qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev, const virDomainDef *def, void *opaque ATTRIBUTE_UNUSED) @@ -3761,11 +3782,14 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDe= f *dev, ret =3D qemuDomainDeviceDefValidateDisk(dev->data.disk); break; =20 + case VIR_DOMAIN_DEVICE_CONTROLLER: + ret =3D qemuDomainDeviceDefValidateController(dev->data.controller= , def); + break; + case VIR_DOMAIN_DEVICE_LEASE: case VIR_DOMAIN_DEVICE_FS: case VIR_DOMAIN_DEVICE_INPUT: case VIR_DOMAIN_DEVICE_SOUND: - case VIR_DOMAIN_DEVICE_CONTROLLER: case VIR_DOMAIN_DEVICE_GRAPHICS: case VIR_DOMAIN_DEVICE_HUB: case VIR_DOMAIN_DEVICE_MEMBALLOON: diff --git a/tests/qemuxml2argvdata/qemuxml2argv-user-aliases.xml b/tests/q= emuxml2argvdata/qemuxml2argv-user-aliases.xml index c760098fe..d1cb8fea6 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-user-aliases.xml +++ b/tests/qemuxml2argvdata/qemuxml2argv-user-aliases.xml @@ -74,9 +74,7 @@
- - - +
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