[PATCH 10/10] nvme: implement multipath access to nvme subsystems

[hch@lst.de (Christoph Hellwig)]

On Wed, Aug 23, 2017@06:53:00PM -0400, Keith Busch wrote:
> On Wed, Aug 23, 2017@07:58:15PM +0200, Christoph Hellwig wrote:
> > 
> > TODO: implement sysfs interfaces for the new subsystem and
> > subsystem-namespace object.  Unless we can come up with something
> > better than sysfs here..
> 
> Can we get symlinks from the multipath'ed nvme block device to the
> individual paths? I think it should be something like the following:
>  
> > @@ -2616,6 +2821,10 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
> >  	if (ns->ndev && nvme_nvm_register_sysfs(ns))
> >  		pr_warn("%s: failed to register lightnvm sysfs group for identification\n",
> >  			ns->disk->disk_name);
> > +
> > +	if (new)
> > +		add_disk(ns->head->disk);
> +
> +	sysfs_create_link(&disk_to_dev(ns->head->disk)->kobj,
> +			  &disk_to_dev(ns->disk)->kobj,
> +			  ns->disk->name);

Yeah, probably..