[PATCH 07/10] nvme: track shared namespaces

[Christoph Hellwig]

On Mon, Aug 28, 2017 at 08:41:23PM +0800, Guan Junxiong wrote:
> If a namespace can be accessed by another subsystem,  the above line
> will ignore such namespace.

And that's intentional.

> Or does the NVMe/NVMf specification constrain that any namespace
> can only be accessed by a subsystem?

Yes, inside the NVMe spec a Namespace is contained inside a Subsystem.
That doesn't preclude other ways to access the LBAs, but they are outside
the specification (e.g. also exporting them as SCSI).