Re: [PATCH 6/8] qdev: realize BlockParentClass

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov(a)virtuozzo.com&gt; --- 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);