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>
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index d7dc234..49b3377 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -305,33 +305,36 @@
static int parse_drive(DeviceState *dev, Property *prop, const char *str)
{
- DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
+ BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
+ BlockDriverState *bs;
- *ptr = drive_get_by_id(str);
- if (*ptr == NULL)
+ bs = bdrv_find(str);
+ if (bs == NULL)
return -ENOENT;
+ *ptr = bs;
return 0;
}
static void free_drive(DeviceState *dev, Property *prop)
{
- DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
+ BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
if (*ptr) {
- blockdev_auto_del((*ptr)->bdrv);
+ blockdev_auto_del(*ptr);
}
}
static int print_drive(DeviceState *dev, Property *prop, char *dest, size_t len)
{
- DriveInfo **ptr = qdev_get_prop_ptr(dev, prop);
- return snprintf(dest, len, "%s", (*ptr) ? (*ptr)->id : "<null>");
+ BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
+ return snprintf(dest, len, "%s",
+ *ptr ? bdrv_get_device_name(*ptr) : "<null>");
}
PropertyInfo qdev_prop_drive = {
.name = "drive",
.type = PROP_TYPE_DRIVE,
- .size = sizeof(DriveInfo*),
+ .size = sizeof(BlockDriverState *),
.parse = parse_drive,
.print = print_drive,
.free = free_drive,
@@ -657,7 +660,7 @@
qdev_prop_set(dev, name, &value, PROP_TYPE_STRING);
}
-void qdev_prop_set_drive(DeviceState *dev, const char *name, DriveInfo *value)
+void qdev_prop_set_drive(DeviceState *dev, const char *name, BlockDriverState *value)
{
qdev_prop_set(dev, name, &value, PROP_TYPE_DRIVE);
}
