From patchwork Thu May 2 02:26:44 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wayne Xia X-Patchwork-Id: 240882 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 7385F2C00D4 for ; Thu, 2 May 2013 12:30:02 +1000 (EST) Received: from localhost ([::1]:50031 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UXjHU-00059U-L9 for incoming@patchwork.ozlabs.org; Wed, 01 May 2013 22:30:00 -0400 Received: from eggs.gnu.org ([208.118.235.92]:53346) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UXjGG-0003cc-7l for qemu-devel@nongnu.org; Wed, 01 May 2013 22:28:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UXjGF-0002pg-9P for qemu-devel@nongnu.org; Wed, 01 May 2013 22:28:44 -0400 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:43062) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UXjGE-0002oJ-30 for qemu-devel@nongnu.org; Wed, 01 May 2013 22:28:43 -0400 Received: from /spool/local by e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 2 May 2013 12:18:49 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id BE1B13578053 for ; Thu, 2 May 2013 12:28:31 +1000 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r422ElGM12714238 for ; Thu, 2 May 2013 12:14:47 +1000 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r422SUnL011389 for ; Thu, 2 May 2013 12:28:31 +1000 Received: from RH63Wenchao (wenchaox.cn.ibm.com [9.115.122.225]) by d23av04.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r422QrHK008158; Thu, 2 May 2013 12:28:29 +1000 From: Wenchao Xia To: qemu-devel@nongnu.org Date: Thu, 2 May 2013 10:26:44 +0800 Message-Id: <1367461606-7554-4-git-send-email-xiawenc@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1367461606-7554-1-git-send-email-xiawenc@linux.vnet.ibm.com> References: <1367461606-7554-1-git-send-email-xiawenc@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13050202-0260-0000-0000-000002E536C9 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] X-Received-From: 202.81.31.140 Cc: kwolf@redhat.com, stefanha@gmail.com, dietmar@proxmox.com, pbonzini@redhat.com, Wenchao Xia Subject: [Qemu-devel] [PATCH V4 3/5] block: package committing code in qmp_transaction() 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 The code is simply moved into a separate function. Signed-off-by: Wenchao Xia Reviewed-by: Eric Blake --- blockdev.c | 19 ++++++++++++------- 1 files changed, 12 insertions(+), 7 deletions(-) diff --git a/blockdev.c b/blockdev.c index 06100d7..26bc78e 100644 --- a/blockdev.c +++ b/blockdev.c @@ -871,6 +871,17 @@ static void external_snapshot_prepare(BlockdevAction *action, } } +static void external_snapshot_commit(BlkTransactionStates *states) +{ + /* This removes our old bs from the bdrv_states, and adds the new bs */ + bdrv_append(states->new_bs, states->old_bs); + /* We don't need (or want) to use the transactional + * bdrv_reopen_multiple() across all the entries at once, because we + * don't want to abort all of them if one of them fails the reopen */ + bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, + NULL); +} + /* * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail * then we do not pivot any of the devices in the group, and abandon the @@ -916,13 +927,7 @@ void qmp_transaction(BlockdevActionList *dev_list, Error **errp) /* Now we are going to do the actual pivot. Everything up to this point * is reversible, but we are committed at this point */ QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { - /* This removes our old bs from the bdrv_states, and adds the new bs */ - bdrv_append(states->new_bs, states->old_bs); - /* We don't need (or want) to use the transactional - * bdrv_reopen_multiple() across all the entries at once, because we - * don't want to abort all of them if one of them fails the reopen */ - bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, - NULL); + external_snapshot_commit(states); } /* success */