Christian Brauner
f0c1dc50ef
In preparation for runtime block-device hotplug, where in-flight QMP callbacks need to keep a slot reference on the DriveInfo while the bridge also holds it in its block-device registry. Today each DriveInfo has exactly one owner; switch the API from drive_info_free() / drive_info_freep to drive_info_ref() / drive_info_unref() / drive_info_unrefp so future code can take additional refs without the caller losing track of ownership. drive_info_new() initialises n_ref to 1 (one ref for the caller). The existing drive_infos_done() and the prepare_*_drive() callers in vmspawn.c are switched to the unref form. No behaviour change: each DriveInfo still has exactly one ref at every point in this commit. Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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