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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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6
hw/scsi-generic.c
View file

@ -453,7 +453,7 @@ static void scsi_destroy(SCSIDevice *d)
r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests));
scsi_remove_request(r);
}
blockdev_mark_auto_del(s->qdev.conf.dinfo->bdrv);
blockdev_mark_auto_del(s->qdev.conf.bs);
}
static int scsi_generic_initfn(SCSIDevice *dev)
@ -462,11 +462,11 @@ static int scsi_generic_initfn(SCSIDevice *dev)
int sg_version;
struct sg_scsi_id scsiid;
if (!s->qdev.conf.dinfo || !s->qdev.conf.dinfo->bdrv) {
if (!s->qdev.conf.bs) {
error_report("scsi-generic: drive property not set");
return -1;
}
s->bs = s->qdev.conf.dinfo->bdrv;
s->bs = s->qdev.conf.bs;
/* check we are really using a /dev/sg* file */
if (!bdrv_is_sg(s->bs)) {