fuse_ctl_add_dentry
parent = fuse_ctl_add_dentry(parent, fc, name, S_IFDIR | 0500,
if (!fuse_ctl_add_dentry(parent, fc, "waiting", S_IFREG | 0400,
!fuse_ctl_add_dentry(parent, fc, "abort", S_IFREG | 0200,
!fuse_ctl_add_dentry(parent, fc, "max_background", S_IFREG | 0600,
!fuse_ctl_add_dentry(parent, fc, "congestion_threshold",