From nobody Thu May 15 09:55:15 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 15108366004671014.9391181577289; Thu, 16 Nov 2017 04:50:00 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 36E355D9E2; Thu, 16 Nov 2017 12:49:57 +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 120B160560; Thu, 16 Nov 2017 12:49:57 +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 CDC6F3D384; Thu, 16 Nov 2017 12:49:56 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id vAGCmcWY004475 for ; Thu, 16 Nov 2017 07:48:38 -0500 Received: by smtp.corp.redhat.com (Postfix) id A708A2C7C4; Thu, 16 Nov 2017 12:48:38 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id D4A0D1748E; Thu, 16 Nov 2017 12:48:37 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Thu, 16 Nov 2017 13:48:02 +0100 Message-Id: In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-loop: libvir-list@redhat.com Cc: Peter Krempa Subject: [libvirt] [PATCH 09/11] qemu: Disallow pivot of shared disks to unsupported storage 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 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 16 Nov 2017 12:49:57 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" Pivoting to a unsupported storage type might break the assumption that shared disks will not corrupt metadata. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=3D1511480 --- src/qemu/qemu_driver.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index f7984a87d..520409cc1 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -16501,6 +16501,16 @@ qemuDomainBlockPivot(virQEMUDriverPtr driver, goto cleanup; } + /* When pivoting to a shareable disk we need to make sure that the dis= k can + * be safely shared, since block copy might have changed the format. */ + if (disk->src->shared && !disk->src->readonly && + !qemuBlockStorageSourceSupportsConcurrentAccess(disk->mirror)) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s", + _("can't pivot a shared disk to a storage volume no= t " + "supporting sharing")); + goto cleanup; + } + /* For active commit, the mirror is part of the already labeled * chain. For blockcopy, we previously labeled only the top-level * image; but if the user is reusing an external image that --=20 2.14.3 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list