From mboxrd@z Thu Jan 1 00:00:00 1970 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 From: Wen Congyang Date: Wed, 25 Mar 2015 17:36:05 +0800 Message-ID: <1427276174-9130-5-git-send-email-wency@cn.fujitsu.com> 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 Content-Type: text/plain Subject: [Qemu-devel] [RFC PATCH COLO v2 04/13] Add new block driver interfaces to control block replication List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini 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 Signed-off-by: Wen Congyang Signed-off-by: zhanghailiang Signed-off-by: Gonglei Cc: Luiz Capitulino Cc: Michael Roth --- 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 -- 2.1.0