FS_VNODE_CAPABILITY_IOCTL
if (!HasVNodeCapability(vnode, FS_VNODE_CAPABILITY_IOCTL))
fNodeCapabilities.Set(FS_VNODE_CAPABILITY_IOCTL, fFSOps->ioctl);
capabilities.Set(FS_VNODE_CAPABILITY_IOCTL, ops->ioctl);