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qdev: Decouple qdev_prop_drive from DriveInfo

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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>
This commit is contained in:
Markus Armbruster 2010-05-05 16:36:52 +02:00 • committed by Kevin Wolf
parent 14bafc5407
commit f8b6cc0070
16 changed files with 73 additions and 72 deletions
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4
hw/pci-hotplug.c
View file

@ -89,7 +89,7 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
* specified).
*/
dinfo->unit = qemu_opt_get_number(dinfo->opts, "unit", -1);
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo, dinfo->unit);
scsidev = scsi_bus_legacy_add_drive(scsibus, dinfo->bdrv, dinfo->unit);
if (!scsidev) {
return -1;
}
@ -214,7 +214,7 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
return NULL;
}
dev = pci_create(bus, devfn, "virtio-blk-pci");
qdev_prop_set_drive(&dev->qdev, "drive", dinfo);
qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv);
if (qdev_init(&dev->qdev) < 0)
dev = NULL;
break;