From patchwork Wed Mar 25 09:36:05 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 454335 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 9A5F7140077 for ; Wed, 25 Mar 2015 20:40:18 +1100 (AEDT) Received: from localhost ([::1]:37128 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YahnM-0000sl-L7 for incoming@patchwork.ozlabs.org; Wed, 25 Mar 2015 05:40:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40413) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yahgk-0005zu-Bu for qemu-devel@nongnu.org; Wed, 25 Mar 2015 05:33:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yahgj-0007rT-4C for qemu-devel@nongnu.org; Wed, 25 Mar 2015 05:33:26 -0400 Received: from [59.151.112.132] (port=64123 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yahgi-0007mj-Bm; Wed, 25 Mar 2015 05:33:25 -0400 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="89293789" Received: from unknown (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 25 Mar 2015 17:29:39 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t2P9WK8X015796; Wed, 25 Mar 2015 17:32:20 +0800 Received: from G08FNSTD140052.g08.fujitsu.local (10.167.226.52) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Wed, 25 Mar 2015 17:33:27 +0800 From: Wen Congyang To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini Date: Wed, 25 Mar 2015 17:36:05 +0800 Message-ID: <1427276174-9130-5-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1427276174-9130-1-git-send-email-wency@cn.fujitsu.com> References: <1427276174-9130-1-git-send-email-wency@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.52] X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Cc: Kevin Wolf , qemu block , Lai Jiangshan , Jiang Yunhong , Dong Eddie , "Dr. David Alan Gilbert" , Luiz Capitulino , Gonglei , Stefan Hajnoczi , Yang Hongyang , Michael Roth , zhanghailiang Subject: [Qemu-devel] [RFC PATCH COLO v2 04/13] Add new block driver interfaces to control block replication 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 Signed-off-by: Wen Congyang Signed-off-by: zhanghailiang Signed-off-by: Gonglei Cc: Luiz Capitulino Cc: Michael Roth Reviewed-by: Paolo Bonzini --- block.c | 39 +++++++++++++++++++++++++++++++++++++++ include/block/block.h | 4 ++++ include/block/block_int.h | 11 +++++++++++ qapi/block.json | 16 ++++++++++++++++ 4 files changed, 70 insertions(+) diff --git a/block.c b/block.c index 0fe97de..0ff5cf8 100644 --- a/block.c +++ b/block.c @@ -6196,3 +6196,42 @@ BlockAcctStats *bdrv_get_stats(BlockDriverState *bs) { return &bs->stats; } + +void bdrv_start_replication(BlockDriverState *bs, COLOMode mode, Error **errp) +{ + BlockDriver *drv = bs->drv; + + if (drv && drv->bdrv_start_replication) { + drv->bdrv_start_replication(bs, mode, errp); + } else if (bs->file) { + bdrv_start_replication(bs->file, mode, errp); + } else { + error_set(errp, QERR_UNSUPPORTED); + } +} + +void bdrv_do_checkpoint(BlockDriverState *bs, Error **errp) +{ + BlockDriver *drv = bs->drv; + + if (drv && drv->bdrv_do_checkpoint) { + drv->bdrv_do_checkpoint(bs, errp); + } else if (bs->file) { + bdrv_do_checkpoint(bs->file, errp); + } else { + error_set(errp, QERR_UNSUPPORTED); + } +} + +void bdrv_stop_replication(BlockDriverState *bs, Error **errp) +{ + BlockDriver *drv = bs->drv; + + if (drv && drv->bdrv_stop_replication) { + drv->bdrv_stop_replication(bs, errp); + } else if (bs->file) { + bdrv_stop_replication(bs->file, errp); + } else { + error_set(errp, QERR_UNSUPPORTED); + } +} diff --git a/include/block/block.h b/include/block/block.h index 4c57d63..68f3b1a 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -569,4 +569,8 @@ void bdrv_flush_io_queue(BlockDriverState *bs); BlockAcctStats *bdrv_get_stats(BlockDriverState *bs); +void bdrv_start_replication(BlockDriverState *bs, COLOMode mode, Error **errp); +void bdrv_do_checkpoint(BlockDriverState *bs, Error **errp); +void bdrv_stop_replication(BlockDriverState *bs, Error **errp); + #endif diff --git a/include/block/block_int.h b/include/block/block_int.h index dccb092..08dd8ba 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -290,6 +290,17 @@ struct BlockDriver { */ int (*bdrv_probe_geometry)(BlockDriverState *bs, HDGeometry *geo); + + void (*bdrv_start_replication)(BlockDriverState *bs, COLOMode mode, + Error **errp); + /* Drop Disk buffer when doing checkpoint. */ + void (*bdrv_do_checkpoint)(BlockDriverState *bs, Error **errp); + /* + * After failover, we should flush Disk buffer into secondary disk + * and stop block replication. + */ + void (*bdrv_stop_replication)(BlockDriverState *bs, Error **errp); + QLIST_ENTRY(BlockDriver) list; }; diff --git a/qapi/block.json b/qapi/block.json index e313465..e640566 100644 --- a/qapi/block.json +++ b/qapi/block.json @@ -40,6 +40,22 @@ 'data': ['auto', 'none', 'lba', 'large', 'rechs']} ## +# @COLOMode +# +# An enumeration of COLO mode. +# +# @unprotected: COLO is not started or after failover +# +# @primary: Primary mode, the vm's state will be sent to secondary QEMU. +# +# @secondary: Secondary mode, receive the vm's state from primary QEMU. +# +# Since: 2.4 +## +{ 'enum' : 'COLOMode', + 'data' : ['unprotected', 'primary', 'secondary']} + +## # @BlockdevSnapshotInternal # # @device: the name of the device to generate the snapshot from