From nobody Mon Feb 9 09:00:24 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 1534176152955574.053852909719; Mon, 13 Aug 2018 09:02:32 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AA1F236A5E6; Mon, 13 Aug 2018 16:02:28 +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 6256710493B4; Mon, 13 Aug 2018 16:02:28 +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 0DD7A18037F3; Mon, 13 Aug 2018 16:02:28 +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 w7DG15ac001524 for ; Mon, 13 Aug 2018 12:01:05 -0400 Received: by smtp.corp.redhat.com (Postfix) id DD2F42166BA5; Mon, 13 Aug 2018 16:01:04 +0000 (UTC) Received: from angien.brq.redhat.com (unknown [10.43.2.136]) by smtp.corp.redhat.com (Postfix) with ESMTP id 79ED02166BB1 for ; Mon, 13 Aug 2018 16:01:04 +0000 (UTC) From: Peter Krempa To: libvir-list@redhat.com Date: Mon, 13 Aug 2018 18:00:07 +0200 Message-Id: <5b10ab3f214c13b66d7379d517d31bc37f632f30.1534173735.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 33/62] qemu: block: Add generator for the 'copy-on-read' blockdev driver 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 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 13 Aug 2018 16:02:30 +0000 (UTC) X-ZohoMail: RDMRC_0 RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" The copy on read functionality is done using a separate layer in the backing chain. Add function to generate properties for it. Signed-off-by: Peter Krempa --- src/qemu/qemu_block.c | 22 ++++++++++++++++++++++ src/qemu/qemu_block.h | 2 ++ 2 files changed, 24 insertions(+) diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c index ccdd334367..5321dda316 100644 --- a/src/qemu/qemu_block.c +++ b/src/qemu/qemu_block.c @@ -1745,3 +1745,25 @@ qemuBlockSnapshotAddLegacy(virJSONValuePtr actions, VIR_FREE(source); return ret; } + + +/** + * qemuBlockStorageGetCopyOnReadProps: + * @disk: disk with copy-on-read enabled + * + * Creates blockdev properties for a disk copy-on-read layer. + */ +virJSONValuePtr +qemuBlockStorageGetCopyOnReadProps(virDomainDiskDefPtr disk) +{ + qemuDomainDiskPrivatePtr priv =3D QEMU_DOMAIN_DISK_PRIVATE(disk); + virJSONValuePtr ret =3D NULL; + + ignore_value(virJSONValueObjectCreate(&ret, + "s:driver", "copy-on-read", + "s:node-name", priv->nodeCopyOnR= ead, + "s:file", disk->src->nodeformat, + NULL)); + + return ret; +} diff --git a/src/qemu/qemu_block.h b/src/qemu/qemu_block.h index fd8984e60b..62ed5027cb 100644 --- a/src/qemu/qemu_block.h +++ b/src/qemu/qemu_block.h @@ -67,6 +67,8 @@ qemuBlockStorageSourceGetURI(virStorageSourcePtr src); virJSONValuePtr qemuBlockStorageSourceGetBlockdevProps(virStorageSourcePtr src); +virJSONValuePtr +qemuBlockStorageGetCopyOnReadProps(virDomainDiskDefPtr disk); typedef struct qemuBlockStorageSourceAttachData qemuBlockStorageSourceAtta= chData; typedef qemuBlockStorageSourceAttachData *qemuBlockStorageSourceAttachData= Ptr; --=20 2.16.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list