From patchwork Tue Feb 19 15:45:04 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 221840 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 7940C2C02CD for ; Wed, 20 Feb 2013 05:54:44 +1100 (EST) Received: from localhost ([::1]:57744 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U7pOE-00083D-Ek for incoming@patchwork.ozlabs.org; Tue, 19 Feb 2013 10:45:54 -0500 Received: from eggs.gnu.org ([208.118.235.92]:57081) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U7pNk-0006qT-Kb for qemu-devel@nongnu.org; Tue, 19 Feb 2013 10:45:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U7pNh-0000si-V1 for qemu-devel@nongnu.org; Tue, 19 Feb 2013 10:45:24 -0500 Received: from mx1.redhat.com ([209.132.183.28]:17874) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U7pNh-0000sa-N9 for qemu-devel@nongnu.org; Tue, 19 Feb 2013 10:45:21 -0500 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r1JFjLUb000805 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 19 Feb 2013 10:45:21 -0500 Received: from localhost (ovpn-112-41.ams2.redhat.com [10.36.112.41]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id r1JFjJMs028547; Tue, 19 Feb 2013 10:45:20 -0500 From: Stefan Hajnoczi To: Date: Tue, 19 Feb 2013 16:45:04 +0100 Message-Id: <1361288706-13929-5-git-send-email-stefanha@redhat.com> In-Reply-To: <1361288706-13929-1-git-send-email-stefanha@redhat.com> References: <1361288706-13929-1-git-send-email-stefanha@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Kevin Wolf , Stefan Hajnoczi Subject: [Qemu-devel] [PATCH 4/6] qcow2: flush in qcow2_update_snapshot_refcount() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Users of qcow2_update_snapshot_refcount() do not flush consistently. qcow2_snapshot_create() flushes but qcow2_snapshot_goto() and qcow2_snapshot_delete() do not. Solve this by moving the bdrv_flush() into qcow2_update_snapshot_refcount(). Signed-off-by: Stefan Hajnoczi --- block/qcow2-refcount.c | 2 +- block/qcow2-snapshot.c | 5 ----- 2 files changed, 1 insertion(+), 6 deletions(-) diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 4ef3dac..df29187 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -841,7 +841,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs, } } - ret = 0; + ret = bdrv_flush(bs); fail: if (l2_table) { qcow2_cache_put(bs, s->l2_table_cache, (void**) &l2_table); diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 429bbff..d433937 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -378,11 +378,6 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) goto fail; } - ret = bdrv_flush(bs); - if (ret < 0) { - goto fail; - } - /* Append the new snapshot to the snapshot list */ new_snapshot_list = g_malloc((s->nb_snapshots + 1) * sizeof(QCowSnapshot)); if (s->snapshots) {