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[PATCH 6/8] qdev: realize BlockParentClass
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[PATCH 6/8] qdev: realize BlockParentClass |
Date: |
Mon, 2 Aug 2021 21:54:14 +0300 |
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@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
- [PATCH RFC 0/8] blockdev-replace, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 2/8] block: add BlockParentClass class, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 1/8] block-backend: blk_root(): drop const specifier on return type, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 3/8] block: realize BlockParentClass for BlockDriverState, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 5/8] qdev: improve find_device_state() to distinguish simple not found case, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 4/8] block/export: realize BlockParentClass functionality, Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 6/8] qdev: realize BlockParentClass,
Vladimir Sementsov-Ogievskiy <=
- [PATCH 7/8] block: improve bdrv_replace_node_noperm(), Vladimir Sementsov-Ogievskiy, 2021/08/02
- [PATCH 8/8] qapi: add blockdev-replace command, Vladimir Sementsov-Ogievskiy, 2021/08/02