From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Jin Subject: [patch] xen-blkback: sync I/O after backend disconnected Date: Mon, 15 Aug 2011 12:55:02 +0800 Message-ID: <4E48A6A6.4040706@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk , Jens Axboe , Ian Campbell Cc: Kurt C Hackel , Greg Marsden , Joe Jin , "xen-devel@lists.xensource.com" , "linux-kernel@vger.kernel.org" List-Id: xen-devel@lists.xenproject.org When backend disconnect, sync IO requests to the disk. Signed-off-by: Joe Jin Cc: Jens Axboe Cc: Konrad Rzeszutek Wilk Cc: Ian Campbell --- drivers/block/xen-blkback/xenbus.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 1a87f5b..da39d61 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -35,6 +35,7 @@ static void connect(struct backend_info *); static int connect_ring(struct backend_info *); static void backend_changed(struct xenbus_watch *, const char **, unsigned int); +static void xen_vbd_sync(struct xen_vbd *vbd); struct xenbus_device *xen_blkbk_xenbus(struct backend_info *be) { @@ -232,6 +233,7 @@ static void xen_blkif_disconnect(struct xen_blkif *blkif) free_vm_area(blkif->blk_ring_area); blkif->blk_rings.common.sring = NULL; } + xen_vbd_sync(&blkif->vbd); } void xen_blkif_free(struct xen_blkif *blkif) @@ -332,6 +334,12 @@ static void xen_vbd_free(struct xen_vbd *vbd) vbd->bdev = NULL; } +static void xen_vbd_sync(struct xen_vbd *vbd) +{ + if (vbd->bdev) + fsync_bdev(vbd->bdev); +} + static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle, unsigned major, unsigned minor, int readonly, int cdrom)