From patchwork Wed Jun 13 08:11:49 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v3, 2/3] xen: Don't change -drive if=xen device name during machine init Date: Tue, 12 Jun 2012 22:11:49 -0000 From: Markus Armbruster X-Patchwork-Id: 164586 Message-Id: <1339575110-18207-3-git-send-email-armbru@redhat.com> To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, peter.maydell@linaro.org, stefano.stabellini@eu.citrix.com A "top" BlockDriverState has a non-empty device_name. If the user doesn't specify one with -drive parameter id, the system supplies a default name. xen_config_dev_blk() changes this name, during machine initialization. Naughty. Don't do that. Signed-off-by: Markus Armbruster --- hw/xen_devconfig.c | 9 ++++----- 1 files changed, 4 insertions(+), 5 deletions(-) diff --git a/hw/xen_devconfig.c b/hw/xen_devconfig.c index 41accbb..7b7b0a2 100644 --- a/hw/xen_devconfig.c +++ b/hw/xen_devconfig.c @@ -94,16 +94,15 @@ static int xen_config_dev_all(char *fe, char *be) int xen_config_dev_blk(DriveInfo *disk) { - char fe[256], be[256]; + char fe[256], be[256], device_name[32]; int vdev = 202 * 256 + 16 * disk->unit; int cdrom = disk->media_cd; const char *devtype = cdrom ? "cdrom" : "disk"; const char *mode = cdrom ? "r" : "w"; - snprintf(disk->bdrv->device_name, sizeof(disk->bdrv->device_name), - "xvd%c", 'a' + disk->unit); + snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit); xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n", - disk->unit, disk->bdrv->device_name, disk->bdrv->filename); + disk->unit, device_name, disk->bdrv->filename); xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe)); /* frontend */ @@ -111,7 +110,7 @@ int xen_config_dev_blk(DriveInfo *disk) xenstore_write_str(fe, "device-type", devtype); /* backend */ - xenstore_write_str(be, "dev", disk->bdrv->device_name); + xenstore_write_str(be, "dev", device_name); xenstore_write_str(be, "type", "file"); xenstore_write_str(be, "params", disk->bdrv->filename); xenstore_write_str(be, "mode", mode);