From nobody Sat Feb 7 10:44:42 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 1550678003959683.3835684437631; Wed, 20 Feb 2019 07:53:23 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 73C9B11BB5B; Wed, 20 Feb 2019 15:53:21 +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 123674BD; Wed, 20 Feb 2019 15:53:21 +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 BC5FB181A00C; Wed, 20 Feb 2019 15:53:20 +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 x1KFrJ8x031729 for ; Wed, 20 Feb 2019 10:53:19 -0500 Received: by smtp.corp.redhat.com (Postfix) id E180E60F94; Wed, 20 Feb 2019 15:53:19 +0000 (UTC) Received: from blue.redhat.com (ovpn-116-222.phx2.redhat.com [10.3.116.222]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E5B460BF6; Wed, 20 Feb 2019 15:53:19 +0000 (UTC) From: Eric Blake To: libvir-list@redhat.com Date: Wed, 20 Feb 2019 09:53:10 -0600 Message-Id: <20190220155316.6329-2-eblake@redhat.com> In-Reply-To: <20190220155316.6329-1-eblake@redhat.com> References: <20190220155316.6329-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: libvir-list@redhat.com Cc: nsoffer@redhat.com Subject: [libvirt] [PATCH 1/7] domain: Document VIR_DOMAIN_XML_MIGRATABLE 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: , 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 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Wed, 20 Feb 2019 15:53:22 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Commit 28f8dfdc (1.0.0) added a flag to virDomainGetXMLDesc, but failed to document its effects. And considering that the MIGRATABLE flag has been the source of past bugs (CVE-2014-7823, fixed in commit b1674ad5 (1.2.11), or even cf2d4c60 (1.2.13) where flag mismatch broke virsh edit), make the wording wishy-washy enough to discourage using the flag casually, by mentioning that the resulting XML is more for internal use than for validation against the schema. Signed-off-by: Eric Blake --- src/libvirt-domain.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c index e2ed8b2772..072b92b717 100644 --- a/src/libvirt-domain.c +++ b/src/libvirt-domain.c @@ -2561,6 +2561,15 @@ virDomainGetControlInfo(virDomainPtr domain, * describing CPU capabilities is modified to match actual * capabilities of the host. * + * If @flags contains VIR_DOMAIN_XML_MIGRATABLE, the XML is altered to + * assist in migrations, since the source and destination may be + * running different libvirt versions. This may include trimming + * redundant or default information that might confuse an older + * recipient, or exposing internal details that aid a newer recipient; + * this flag is rejected on read-only connections, and the resulting + * XML might not validate against the schema, so it is mainly for + * internal use. + * * Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of e= rror. * the caller must free() the returned value. */ --=20 2.20.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list