[Qemu-devel] Re: [PATCH 06/12] qdev: Decouple qdev_prop_drive from DriveInfo

[Christoph Hellwig <hch@lst.de>]

On Fri, Jun 25, 2010 at 06:53:26PM +0200, Markus Armbruster wrote:
> 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_of_blockdev() there.
> 
> Device model code should now use DriveInfo only when explicitly
> dealing with drives defined the old way, i.e. without -device.

This looks good to me.  Assuming the size change of the property can't
cause any problems:


Reviewed-by: Christoph Hellwig <hch@lst.de>