[PATCH v2 3/5] nvmef: Introduce the NVME_OPT_HIDDEN_NS option

[Christoph Hellwig]

On Fri, Oct 11, 2024 at 09:19:49PM +0900, Damien Le Moal wrote:
> Introduce the NVME fabrics option NVME_OPT_HIDDEN_NS to allow a host
> controller to be created without any user visible or internally usable
> namespace devices. That is, if set, this option will result in the
> controller having no character device and no block device for any of its
> namespaces.
> 
> This option should be used only when the nvme controller will be
> managed using passthrough commands using the controller character
> device, either by the user or by another device driver.

That doesn't make any sense whatsover.  Why would you create a
passthrough controller to support PCIe?