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xen: Don't change -drive if=xen device name during machine init

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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 <armbru@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster 2012-06-13 10:11:49 +02:00 committed by Kevin Wolf
parent f8d6bba1c1
commit 8814a05112
1 changed files with 4 additions and 5 deletions
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9
hw/xen_devconfig.c
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@ -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);