[PATCH 6/8] qdev: realize BlockParentClass
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov(a)virtuozzo.com>
---
softmmu/qdev-monitor.c | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c
index 0117989009..2e149aa9b8 100644
--- a/softmmu/qdev-monitor.c
+++ b/softmmu/qdev-monitor.c
@@ -18,6 +18,7 @@
*/
#include "qemu/osdep.h"
+#include "block/block-parent.h"
#include "hw/sysbus.h"
#include "monitor/hmp.h"
#include "monitor/monitor.h"
@@ -1023,3 +1024,44 @@ bool qmp_command_available(const QmpCommand *cmd, Error **errp)
}
return true;
}
+
+static int qdev_find_child(const char *parent_id, const char *child_name,
+ BlockDriverState *child_bs,
+ BdrvChild **child, Error **errp)
+{
+ int ret;
+ DeviceState *dev;
+ BlockBackend *blk;
+
+ ret = find_device_state(parent_id, &dev, errp);
+ if (ret <= 0) {
+ return ret;
+ }
+
+ blk = blk_by_dev(dev);
+ if (!blk || !blk_root(blk)) {
+ error_setg(errp, "Device '%s' does not have a block device
backend",
+ parent_id);
+ return -EINVAL;
+ }
+
+ if (child_bs && blk_bs(blk) != child_bs) {
+ error_setg(errp, "Root child of device '%s' doesn't match",
parent_id);
+ return -EINVAL;
+ }
+
+ *child = blk_root(blk);
+ return 1;
+}
+
+BlockParentClass block_parent_qdev = {
+ .name = "qdev",
+ .find_child = qdev_find_child,
+};
+
+static void qdev_monitor_init(void)
+{
+ block_parent_class_register(&block_parent_qdev);
+}
+
+block_init(qdev_monitor_init);
--
2.29.2