From nobody Thu May 15 09:46:05 2025 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 1511348364634665.2791761407699; Wed, 22 Nov 2017 02:59:24 -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 69F944B6E5; Wed, 22 Nov 2017 10:59:22 +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 45022648CD; Wed, 22 Nov 2017 10:59:22 +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 103843D383; Wed, 22 Nov 2017 10:59:22 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id vAMAvU2E013088 for ; Wed, 22 Nov 2017 05:57:30 -0500 Received: by smtp.corp.redhat.com (Postfix) id 10E895D973; Wed, 22 Nov 2017 10:57:30 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 622B85D964; Wed, 22 Nov 2017 10:57:29 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Wed, 22 Nov 2017 11:56:51 +0100 Message-Id: <36718e5a014d19d18387eed06b1373a0dc036c77.1511348086.git.pkrempa@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-loop: libvir-list@redhat.com Cc: Peter Krempa Subject: [libvirt] [PATCH v2 08/11] qemu: snapshot: Disallow snapshot of unsupported shared 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 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Wed, 22 Nov 2017 10:59:23 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Creating a snapshot would introduce a possibly unsupported member for sharing into the backing chain. Add a check to prevent that from happening. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=3D1511480 --- src/qemu/qemu_driver.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f830384a72..aa1f1e36d2 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -13944,6 +13944,24 @@ qemuDomainSnapshotCreateActiveInternal(virConnectP= tr conn, } +static int +qemuDomainSnapshotPrepareDiskShared(virDomainSnapshotDiskDefPtr snapdisk, + virDomainDiskDefPtr domdisk) +{ + if (!domdisk->src->shared || domdisk->src->readonly) + return 0; + + if (!qemuBlockStorageSourceSupportsConcurrentAccess(snapdisk->src)) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("shared access for disk '%s' requires use of " + "supported storage format"), domdisk->dst); + return -1; + } + + return 0; +} + + static int qemuDomainSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDefPtr = snapdisk, virDomainDiskDefPtr domdisk) @@ -14006,6 +14024,9 @@ qemuDomainSnapshotPrepareDiskExternalInactive(virDo= mainSnapshotDiskDefPtr snapdi return -1; } + if (qemuDomainSnapshotPrepareDiskShared(snapdisk, domdisk) < 0) + return -1; + return 0; } @@ -14065,6 +14086,9 @@ qemuDomainSnapshotPrepareDiskExternalActive(virDoma= inSnapshotDiskDefPtr snapdisk return -1; } + if (qemuDomainSnapshotPrepareDiskShared(snapdisk, domdisk) < 0) + return -1; + return 0; } --=20 2.14.3 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list