qdev: Decouple qdev_prop_drive from DriveInfo

Make the property point to BlockDriverState, cutting out the DriveInfo
middleman.  This prepares the ground for block devices that don't have
a DriveInfo.

Currently all user-defined ones have a DriveInfo, because the only way
to define one is -drive & friends (they go through drive_init()).
DriveInfo is closely tied to -drive, and like -drive, it mixes
information about host and guest part of the block device.  I'm
working towards a new way to define block devices, with clean
host/guest separation, and I need to get DriveInfo out of the way for
that.

Fortunately, the device models are perfectly happy with
BlockDriverState, except for two places: ide_drive_initfn() and
scsi_disk_initfn() need to check the DriveInfo for a serial number set
with legacy -drive serial=...  Use drive_get_by_blockdev() there.

Device model code should now use DriveInfo only when explicitly
dealing with drives defined the old way, i.e. without -device.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index d5b66c14dd..2c58acac49 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -83,15 +83,15 @@ void scsi_qdev_register(SCSIDeviceInfo *info)
 }
 
 /* handle legacy '-drive if=scsi,...' cmd line args */
-SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, DriveInfo *dinfo, int unit)
+SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, int unit)
 {
     const char *driver;
     DeviceState *dev;
 
-    driver = bdrv_is_sg(dinfo->bdrv) ? "scsi-generic" : "scsi-disk";
+    driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk";
     dev = qdev_create(&bus->qbus, driver);
     qdev_prop_set_uint32(dev, "scsi-id", unit);
-    qdev_prop_set_drive(dev, "drive", dinfo);
+    qdev_prop_set_drive(dev, "drive", bdrv);
     if (qdev_init(dev) < 0)
         return NULL;
     return DO_UPCAST(SCSIDevice, qdev, dev);
@@ -107,7 +107,7 @@ int scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
         if (dinfo == NULL) {
             continue;
         }
-        if (!scsi_bus_legacy_add_drive(bus, dinfo, unit)) {
+        if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit)) {
             res = -1;
             break;
         }